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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 16:12:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 16:12:24 -0700
commit94b5aff4c6f72fee6b0f49d49e4fa8b204e8ded9 (patch)
tree39197121b6ef8cddaa0f4057fe24b4ced58e8982 /drivers/tty
parent5d4e2d08e7fdf7339f84a1c670d296a77e02f881 (diff)
parent59bd234b72fc29887839d792b7d6c7e8d2a577a6 (diff)
downloadop-kernel-dev-94b5aff4c6f72fee6b0f49d49e4fa8b204e8ded9.zip
op-kernel-dev-94b5aff4c6f72fee6b0f49d49e4fa8b204e8ded9.tar.gz
Merge tag 'tty-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY updates from Greg Kroah-Hartman: "Here's the big TTY/serial driver pull request for the 3.5-rc1 merge window. Nothing major in here, just lots of incremental changes from Alan and Jiri reworking some tty core things to behave better and to get a more solid grasp on some of the nasty tty locking issues. There are a few tty and serial driver updates in here as well. All of this has been in the linux-next releases for a while with no problems. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" * tag 'tty-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (115 commits) serial: bfin_uart: Make MMR access compatible with 32 bits bf609 style controller. serial: bfin_uart: RTS and CTS MMRs can be either 16-bit width or 32-bit width. serial: bfin_uart: narrow the reboot condition in DMA tx interrupt serial: bfin_uart: Adapt bf5xx serial driver to bf60x serial4 controller. Revert "serial_core: Update buffer overrun statistics." tty: hvc_xen: NULL dereference on allocation failure tty: Fix LED error return tty: Allow uart_register/unregister/register tty: move global ldisc idle waitqueue to the individual ldisc serial8250-em: Add DT support serial8250-em: clk_get() IS_ERR() error handling fix serial_core: Update buffer overrun statistics. tty: drop the pty lock during hangup cris: fix missing tty arg in wait_event_interruptible_tty call tty/amiserial: Add missing argument for tty_unlock() tty_lock: Localise the lock pty: Lock the devpts bits privately tty_lock: undo the old tty_lock use on the ctty serial8250-em: Emma Mobile UART driver V2 Add missing call to uart_update_timeout() ...
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/amiserial.c14
-rw-r--r--drivers/tty/bfin_jtag_comm.c44
-rw-r--r--drivers/tty/cyclades.c2
-rw-r--r--drivers/tty/hvc/hvc_console.c96
-rw-r--r--drivers/tty/hvc/hvc_console.h4
-rw-r--r--drivers/tty/hvc/hvc_xen.c4
-rw-r--r--drivers/tty/hvc/hvcs.c74
-rw-r--r--drivers/tty/hvc/hvsi.c128
-rw-r--r--drivers/tty/hvc/hvsi_lib.c2
-rw-r--r--drivers/tty/ipwireless/tty.c81
-rw-r--r--drivers/tty/mxser.c2
-rw-r--r--drivers/tty/n_r3964.c11
-rw-r--r--drivers/tty/n_tty.c9
-rw-r--r--drivers/tty/pty.c40
-rw-r--r--drivers/tty/serial/68328serial.c383
-rw-r--r--drivers/tty/serial/68328serial.h186
-rw-r--r--drivers/tty/serial/8250/8250.c312
-rw-r--r--drivers/tty/serial/8250/8250.h16
-rw-r--r--drivers/tty/serial/8250/8250_em.c186
-rw-r--r--drivers/tty/serial/8250/8250_pci.c63
-rw-r--r--drivers/tty/serial/8250/Kconfig8
-rw-r--r--drivers/tty/serial/8250/Makefile1
-rw-r--r--drivers/tty/serial/amba-pl011.c109
-rw-r--r--drivers/tty/serial/bfin_uart.c74
-rw-r--r--drivers/tty/serial/crisv10.c36
-rw-r--r--drivers/tty/serial/mxs-auart.c2
-rw-r--r--drivers/tty/serial/of_serial.c26
-rw-r--r--drivers/tty/serial/omap-serial.c74
-rw-r--r--drivers/tty/serial/pch_uart.c53
-rw-r--r--drivers/tty/serial/serial_core.c1
-rw-r--r--drivers/tty/synclink.c4
-rw-r--r--drivers/tty/synclink_gt.c4
-rw-r--r--drivers/tty/synclinkmp.c4
-rw-r--r--drivers/tty/tty_buffer.c85
-rw-r--r--drivers/tty/tty_io.c76
-rw-r--r--drivers/tty/tty_ldisc.c37
-rw-r--r--drivers/tty/tty_mutex.c60
-rw-r--r--drivers/tty/tty_port.c6
-rw-r--r--drivers/tty/vt/consolemap.c123
-rw-r--r--drivers/tty/vt/vt.c68
-rw-r--r--drivers/tty/vt/vt_ioctl.c25
41 files changed, 1316 insertions, 1217 deletions
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 6cc4358..35819e3 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -1033,7 +1033,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state,
if (!retinfo)
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
- tty_lock();
+ tty_lock(tty);
tmp.line = tty->index;
tmp.port = state->port;
tmp.flags = state->tport.flags;
@@ -1042,7 +1042,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state,
tmp.close_delay = state->tport.close_delay;
tmp.closing_wait = state->tport.closing_wait;
tmp.custom_divisor = state->custom_divisor;
- tty_unlock();
+ tty_unlock(tty);
if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
return -EFAULT;
return 0;
@@ -1059,12 +1059,12 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
return -EFAULT;
- tty_lock();
+ tty_lock(tty);
change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) ||
new_serial.custom_divisor != state->custom_divisor;
if (new_serial.irq || new_serial.port != state->port ||
new_serial.xmit_fifo_size != state->xmit_fifo_size) {
- tty_unlock();
+ tty_unlock(tty);
return -EINVAL;
}
@@ -1074,7 +1074,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
(new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
((new_serial.flags & ~ASYNC_USR_MASK) !=
(port->flags & ~ASYNC_USR_MASK))) {
- tty_unlock();
+ tty_unlock(tty);
return -EPERM;
}
port->flags = ((port->flags & ~ASYNC_USR_MASK) |
@@ -1084,7 +1084,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
}
if (new_serial.baud_base < 9600) {
- tty_unlock();
+ tty_unlock(tty);
return -EINVAL;
}
@@ -1116,7 +1116,7 @@ check_and_exit:
}
} else
retval = startup(tty, state);
- tty_unlock();
+ tty_unlock(tty);
return retval;
}
diff --git a/drivers/tty/bfin_jtag_comm.c b/drivers/tty/bfin_jtag_comm.c
index 946f799..61fc74f 100644
--- a/drivers/tty/bfin_jtag_comm.c
+++ b/drivers/tty/bfin_jtag_comm.c
@@ -62,9 +62,7 @@ static inline uint32_t bfin_write_emudat_chars(char a, char b, char c, char d)
static struct tty_driver *bfin_jc_driver;
static struct task_struct *bfin_jc_kthread;
-static struct tty_struct * volatile bfin_jc_tty;
-static unsigned long bfin_jc_count;
-static DEFINE_MUTEX(bfin_jc_tty_mutex);
+static struct tty_port port;
static volatile struct circ_buf bfin_jc_write_buf;
static int
@@ -73,18 +71,21 @@ bfin_jc_emudat_manager(void *arg)
uint32_t inbound_len = 0, outbound_len = 0;
while (!kthread_should_stop()) {
+ struct tty_struct *tty = tty_port_tty_get(&port);
/* no one left to give data to, so sleep */
- if (bfin_jc_tty == NULL && circ_empty(&bfin_jc_write_buf)) {
+ if (tty == NULL && circ_empty(&bfin_jc_write_buf)) {
pr_debug("waiting for readers\n");
__set_current_state(TASK_UNINTERRUPTIBLE);
schedule();
__set_current_state(TASK_RUNNING);
+ continue;
}
/* no data available, so just chill */
if (!(bfin_read_DBGSTAT() & EMUDIF) && circ_empty(&bfin_jc_write_buf)) {
pr_debug("waiting for data (in_len = %i) (circ: %i %i)\n",
inbound_len, bfin_jc_write_buf.tail, bfin_jc_write_buf.head);
+ tty_kref_put(tty);
if (inbound_len)
schedule();
else
@@ -94,9 +95,6 @@ bfin_jc_emudat_manager(void *arg)
/* if incoming data is ready, eat it */
if (bfin_read_DBGSTAT() & EMUDIF) {
- struct tty_struct *tty;
- mutex_lock(&bfin_jc_tty_mutex);
- tty = (struct tty_struct *)bfin_jc_tty;
if (tty != NULL) {
uint32_t emudat = bfin_read_emudat();
if (inbound_len == 0) {
@@ -110,7 +108,6 @@ bfin_jc_emudat_manager(void *arg)
tty_flip_buffer_push(tty);
}
}
- mutex_unlock(&bfin_jc_tty_mutex);
}
/* if outgoing data is ready, post it */
@@ -120,7 +117,6 @@ bfin_jc_emudat_manager(void *arg)
bfin_write_emudat(outbound_len);
pr_debug("outgoing length: 0x%08x\n", outbound_len);
} else {
- struct tty_struct *tty;
int tail = bfin_jc_write_buf.tail;
size_t ate = (4 <= outbound_len ? 4 : outbound_len);
uint32_t emudat =
@@ -132,14 +128,12 @@ bfin_jc_emudat_manager(void *arg)
);
bfin_jc_write_buf.tail += ate;
outbound_len -= ate;
- mutex_lock(&bfin_jc_tty_mutex);
- tty = (struct tty_struct *)bfin_jc_tty;
if (tty)
tty_wakeup(tty);
- mutex_unlock(&bfin_jc_tty_mutex);
pr_debug(" outgoing data: 0x%08x (pushing %zu)\n", emudat, ate);
}
}
+ tty_kref_put(tty);
}
__set_current_state(TASK_RUNNING);
@@ -149,24 +143,28 @@ bfin_jc_emudat_manager(void *arg)
static int
bfin_jc_open(struct tty_struct *tty, struct file *filp)
{
- mutex_lock(&bfin_jc_tty_mutex);
- pr_debug("open %lu\n", bfin_jc_count);
- ++bfin_jc_count;
- bfin_jc_tty = tty;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port.lock, flags);
+ port.count++;
+ spin_unlock_irqrestore(&port.lock, flags);
+ tty_port_tty_set(&port, tty);
wake_up_process(bfin_jc_kthread);
- mutex_unlock(&bfin_jc_tty_mutex);
return 0;
}
static void
bfin_jc_close(struct tty_struct *tty, struct file *filp)
{
- mutex_lock(&bfin_jc_tty_mutex);
- pr_debug("close %lu\n", bfin_jc_count);
- if (--bfin_jc_count == 0)
- bfin_jc_tty = NULL;
+ unsigned long flags;
+ bool last;
+
+ spin_lock_irqsave(&port.lock, flags);
+ last = --port.count == 0;
+ spin_unlock_irqrestore(&port.lock, flags);
+ if (last)
+ tty_port_tty_set(&port, NULL);
wake_up_process(bfin_jc_kthread);
- mutex_unlock(&bfin_jc_tty_mutex);
}
/* XXX: we dont handle the put_char() case where we must handle count = 1 */
@@ -242,6 +240,8 @@ static int __init bfin_jc_init(void)
{
int ret;
+ tty_port_init(&port);
+
bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);
if (IS_ERR(bfin_jc_kthread))
return PTR_ERR(bfin_jc_kthread);
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index e61cabd..6984e1a 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -1599,7 +1599,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp)
* If the port is the middle of closing, bail out now
*/
if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(info->port.close_wait,
+ wait_event_interruptible_tty(tty, info->port.close_wait,
!(info->port.flags & ASYNC_CLOSING));
return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
}
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 8880adf..2d691eb 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -107,7 +107,7 @@ static struct hvc_struct *hvc_get_by_index(int index)
list_for_each_entry(hp, &hvc_structs, next) {
spin_lock_irqsave(&hp->lock, flags);
if (hp->index == index) {
- kref_get(&hp->kref);
+ tty_port_get(&hp->port);
spin_unlock_irqrestore(&hp->lock, flags);
spin_unlock(&hvc_structs_lock);
return hp;
@@ -229,9 +229,9 @@ static int __init hvc_console_init(void)
console_initcall(hvc_console_init);
/* callback when the kboject ref count reaches zero. */
-static void destroy_hvc_struct(struct kref *kref)
+static void hvc_port_destruct(struct tty_port *port)
{
- struct hvc_struct *hp = container_of(kref, struct hvc_struct, kref);
+ struct hvc_struct *hp = container_of(port, struct hvc_struct, port);
unsigned long flags;
spin_lock(&hvc_structs_lock);
@@ -264,7 +264,7 @@ int hvc_instantiate(uint32_t vtermno, int index, const struct hv_ops *ops)
/* make sure no no tty has been registered in this index */
hp = hvc_get_by_index(index);
if (hp) {
- kref_put(&hp->kref, destroy_hvc_struct);
+ tty_port_put(&hp->port);
return -1;
}
@@ -313,20 +313,17 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
if (!(hp = hvc_get_by_index(tty->index)))
return -ENODEV;
- spin_lock_irqsave(&hp->lock, flags);
+ spin_lock_irqsave(&hp->port.lock, flags);
/* Check and then increment for fast path open. */
- if (hp->count++ > 0) {
- tty_kref_get(tty);
- spin_unlock_irqrestore(&hp->lock, flags);
+ if (hp->port.count++ > 0) {
+ spin_unlock_irqrestore(&hp->port.lock, flags);
hvc_kick();
return 0;
} /* else count == 0 */
+ spin_unlock_irqrestore(&hp->port.lock, flags);
tty->driver_data = hp;
-
- hp->tty = tty_kref_get(tty);
-
- spin_unlock_irqrestore(&hp->lock, flags);
+ tty_port_tty_set(&hp->port, tty);
if (hp->ops->notifier_add)
rc = hp->ops->notifier_add(hp, hp->data);
@@ -338,12 +335,9 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
* tty fields and return the kref reference.
*/
if (rc) {
- spin_lock_irqsave(&hp->lock, flags);
- hp->tty = NULL;
- spin_unlock_irqrestore(&hp->lock, flags);
- tty_kref_put(tty);
+ tty_port_tty_set(&hp->port, NULL);
tty->driver_data = NULL;
- kref_put(&hp->kref, destroy_hvc_struct);
+ tty_port_put(&hp->port);
printk(KERN_ERR "hvc_open: request_irq failed with rc %d.\n", rc);
}
/* Force wakeup of the polling thread */
@@ -370,12 +364,12 @@ static void hvc_close(struct tty_struct *tty, struct file * filp)
hp = tty->driver_data;
- spin_lock_irqsave(&hp->lock, flags);
+ spin_lock_irqsave(&hp->port.lock, flags);
- if (--hp->count == 0) {
+ if (--hp->port.count == 0) {
+ spin_unlock_irqrestore(&hp->port.lock, flags);
/* We are done with the tty pointer now. */
- hp->tty = NULL;
- spin_unlock_irqrestore(&hp->lock, flags);
+ tty_port_tty_set(&hp->port, NULL);
if (hp->ops->notifier_del)
hp->ops->notifier_del(hp, hp->data);
@@ -390,14 +384,13 @@ static void hvc_close(struct tty_struct *tty, struct file * filp)
*/
tty_wait_until_sent_from_close(tty, HVC_CLOSE_WAIT);
} else {
- if (hp->count < 0)
+ if (hp->port.count < 0)
printk(KERN_ERR "hvc_close %X: oops, count is %d\n",
- hp->vtermno, hp->count);
- spin_unlock_irqrestore(&hp->lock, flags);
+ hp->vtermno, hp->port.count);
+ spin_unlock_irqrestore(&hp->port.lock, flags);
}
- tty_kref_put(tty);
- kref_put(&hp->kref, destroy_hvc_struct);
+ tty_port_put(&hp->port);
}
static void hvc_hangup(struct tty_struct *tty)
@@ -412,32 +405,31 @@ static void hvc_hangup(struct tty_struct *tty)
/* cancel pending tty resize work */
cancel_work_sync(&hp->tty_resize);
- spin_lock_irqsave(&hp->lock, flags);
+ spin_lock_irqsave(&hp->port.lock, flags);
/*
* The N_TTY line discipline has problems such that in a close vs
* open->hangup case this can be called after the final close so prevent
* that from happening for now.
*/
- if (hp->count <= 0) {
- spin_unlock_irqrestore(&hp->lock, flags);
+ if (hp->port.count <= 0) {
+ spin_unlock_irqrestore(&hp->port.lock, flags);
return;
}
- temp_open_count = hp->count;
- hp->count = 0;
- hp->n_outbuf = 0;
- hp->tty = NULL;
+ temp_open_count = hp->port.count;
+ hp->port.count = 0;
+ spin_unlock_irqrestore(&hp->port.lock, flags);
+ tty_port_tty_set(&hp->port, NULL);
- spin_unlock_irqrestore(&hp->lock, flags);
+ hp->n_outbuf = 0;
if (hp->ops->notifier_hangup)
hp->ops->notifier_hangup(hp, hp->data);
while(temp_open_count) {
--temp_open_count;
- tty_kref_put(tty);
- kref_put(&hp->kref, destroy_hvc_struct);
+ tty_port_put(&hp->port);
}
}
@@ -478,7 +470,8 @@ static int hvc_write(struct tty_struct *tty, const unsigned char *buf, int count
if (!hp)
return -EPIPE;
- if (hp->count <= 0)
+ /* FIXME what's this (unprotected) check for? */
+ if (hp->port.count <= 0)
return -EIO;
spin_lock_irqsave(&hp->lock, flags);
@@ -526,13 +519,12 @@ static void hvc_set_winsz(struct work_struct *work)
hp = container_of(work, struct hvc_struct, tty_resize);
- spin_lock_irqsave(&hp->lock, hvc_flags);
- if (!hp->tty) {
- spin_unlock_irqrestore(&hp->lock, hvc_flags);
+ tty = tty_port_tty_get(&hp->port);
+ if (!tty)
return;
- }
- ws = hp->ws;
- tty = tty_kref_get(hp->tty);
+
+ spin_lock_irqsave(&hp->lock, hvc_flags);
+ ws = hp->ws;
spin_unlock_irqrestore(&hp->lock, hvc_flags);
tty_do_resize(tty, &ws);
@@ -601,7 +593,7 @@ int hvc_poll(struct hvc_struct *hp)
}
/* No tty attached, just skip */
- tty = tty_kref_get(hp->tty);
+ tty = tty_port_tty_get(&hp->port);
if (tty == NULL)
goto bail;
@@ -681,8 +673,7 @@ int hvc_poll(struct hvc_struct *hp)
tty_flip_buffer_push(tty);
}
- if (tty)
- tty_kref_put(tty);
+ tty_kref_put(tty);
return poll_mask;
}
@@ -817,6 +808,10 @@ static const struct tty_operations hvc_ops = {
#endif
};
+static const struct tty_port_operations hvc_port_ops = {
+ .destruct = hvc_port_destruct,
+};
+
struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
const struct hv_ops *ops,
int outbuf_size)
@@ -842,7 +837,8 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
hp->outbuf_size = outbuf_size;
hp->outbuf = &((char *)hp)[ALIGN(sizeof(*hp), sizeof(long))];
- kref_init(&hp->kref);
+ tty_port_init(&hp->port);
+ hp->port.ops = &hvc_port_ops;
INIT_WORK(&hp->tty_resize, hvc_set_winsz);
spin_lock_init(&hp->lock);
@@ -875,9 +871,9 @@ int hvc_remove(struct hvc_struct *hp)
unsigned long flags;
struct tty_struct *tty;
- spin_lock_irqsave(&hp->lock, flags);
- tty = tty_kref_get(hp->tty);
+ tty = tty_port_tty_get(&hp->port);
+ spin_lock_irqsave(&hp->lock, flags);
if (hp->index < MAX_NR_HVC_CONSOLES)
vtermnos[hp->index] = -1;
@@ -891,7 +887,7 @@ int hvc_remove(struct hvc_struct *hp)
* kref cause it to be removed, which will probably be the tty_vhangup
* below.
*/
- kref_put(&hp->kref, destroy_hvc_struct);
+ tty_port_put(&hp->port);
/*
* This function call will auto chain call hvc_hangup.
diff --git a/drivers/tty/hvc/hvc_console.h b/drivers/tty/hvc/hvc_console.h
index c335a14..674d23c 100644
--- a/drivers/tty/hvc/hvc_console.h
+++ b/drivers/tty/hvc/hvc_console.h
@@ -46,10 +46,9 @@
#define HVC_ALLOC_TTY_ADAPTERS 8
struct hvc_struct {
+ struct tty_port port;
spinlock_t lock;
int index;
- struct tty_struct *tty;
- int count;
int do_wakeup;
char *outbuf;
int outbuf_size;
@@ -61,7 +60,6 @@ struct hvc_struct {
struct winsize ws;
struct work_struct tty_resize;
struct list_head next;
- struct kref kref; /* ref count & hvc_struct lifetime */
};
/* implemented by a low level driver */
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 83d5c88..d3d91da 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -430,9 +430,9 @@ static int __devinit xencons_probe(struct xenbus_device *dev,
if (devid == 0)
return -ENODEV;
- info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL | __GFP_ZERO);
+ info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL);
if (!info)
- goto error_nomem;
+ return -ENOMEM;
dev_set_drvdata(&dev->dev, info);
info->xbdev = dev;
info->vtermno = xenbus_devid_to_vtermno(devid);
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index 3436436..d56788c 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -261,6 +261,7 @@ static DEFINE_SPINLOCK(hvcs_pi_lock);
/* One vty-server per hvcs_struct */
struct hvcs_struct {
+ struct tty_port port;
spinlock_t lock;
/*
@@ -269,9 +270,6 @@ struct hvcs_struct {
*/
unsigned int index;
- struct tty_struct *tty;
- int open_count;
-
/*
* Used to tell the driver kernel_thread what operations need to take
* place upon this hvcs_struct instance.
@@ -290,12 +288,11 @@ struct hvcs_struct {
int chars_in_buffer;
/*
- * Any variable below the kref is valid before a tty is connected and
+ * Any variable below is valid before a tty is connected and
* stays valid after the tty is disconnected. These shouldn't be
* whacked until the kobject refcount reaches zero though some entries
* may be changed via sysfs initiatives.
*/
- struct kref kref; /* ref count & hvcs_struct lifetime */
int connected; /* is the vty-server currently connected to a vty? */
uint32_t p_unit_address; /* partner unit address */
uint32_t p_partition_ID; /* partner partition ID */
@@ -304,9 +301,6 @@ struct hvcs_struct {
struct vio_dev *vdev;
};
-/* Required to back map a kref to its containing object */
-#define from_kref(k) container_of(k, struct hvcs_struct, kref)
-
static LIST_HEAD(hvcs_structs);
static DEFINE_SPINLOCK(hvcs_structs_lock);
static DEFINE_MUTEX(hvcs_init_mutex);
@@ -422,7 +416,7 @@ static ssize_t hvcs_vterm_state_store(struct device *dev, struct device_attribut
spin_lock_irqsave(&hvcsd->lock, flags);
- if (hvcsd->open_count > 0) {
+ if (hvcsd->port.count > 0) {
spin_unlock_irqrestore(&hvcsd->lock, flags);
printk(KERN_INFO "HVCS: vterm state unchanged. "
"The hvcs device node is still in use.\n");
@@ -564,7 +558,7 @@ static irqreturn_t hvcs_handle_interrupt(int irq, void *dev_instance)
static void hvcs_try_write(struct hvcs_struct *hvcsd)
{
uint32_t unit_address = hvcsd->vdev->unit_address;
- struct tty_struct *tty = hvcsd->tty;
+ struct tty_struct *tty = hvcsd->port.tty;
int sent;
if (hvcsd->todo_mask & HVCS_TRY_WRITE) {
@@ -602,7 +596,7 @@ static int hvcs_io(struct hvcs_struct *hvcsd)
spin_lock_irqsave(&hvcsd->lock, flags);
unit_address = hvcsd->vdev->unit_address;
- tty = hvcsd->tty;
+ tty = hvcsd->port.tty;
hvcs_try_write(hvcsd);
@@ -701,10 +695,9 @@ static void hvcs_return_index(int index)
hvcs_index_list[index] = -1;
}
-/* callback when the kref ref count reaches zero */
-static void destroy_hvcs_struct(struct kref *kref)
+static void hvcs_destruct_port(struct tty_port *p)
{
- struct hvcs_struct *hvcsd = from_kref(kref);
+ struct hvcs_struct *hvcsd = container_of(p, struct hvcs_struct, port);
struct vio_dev *vdev;
unsigned long flags;
@@ -741,6 +734,10 @@ static void destroy_hvcs_struct(struct kref *kref)
kfree(hvcsd);
}
+static const struct tty_port_operations hvcs_port_ops = {
+ .destruct = hvcs_destruct_port,
+};
+
static int hvcs_get_index(void)
{
int i;
@@ -789,10 +786,9 @@ static int __devinit hvcs_probe(
if (!hvcsd)
return -ENODEV;
-
+ tty_port_init(&hvcsd->port);
+ hvcsd->port.ops = &hvcs_port_ops;
spin_lock_init(&hvcsd->lock);
- /* Automatically incs the refcount the first time */
- kref_init(&hvcsd->kref);
hvcsd->vdev = dev;
dev_set_drvdata(&dev->dev, hvcsd);
@@ -852,7 +848,7 @@ static int __devexit hvcs_remove(struct vio_dev *dev)
spin_lock_irqsave(&hvcsd->lock, flags);
- tty = hvcsd->tty;
+ tty = hvcsd->port.tty;
spin_unlock_irqrestore(&hvcsd->lock, flags);
@@ -860,7 +856,7 @@ static int __devexit hvcs_remove(struct vio_dev *dev)
* Let the last holder of this object cause it to be removed, which
* would probably be tty_hangup below.
*/
- kref_put(&hvcsd->kref, destroy_hvcs_struct);
+ tty_port_put(&hvcsd->port);
/*
* The hangup is a scheduled function which will auto chain call
@@ -1094,7 +1090,7 @@ static struct hvcs_struct *hvcs_get_by_index(int index)
list_for_each_entry(hvcsd, &hvcs_structs, next) {
spin_lock_irqsave(&hvcsd->lock, flags);
if (hvcsd->index == index) {
- kref_get(&hvcsd->kref);
+ tty_port_get(&hvcsd->port);
spin_unlock_irqrestore(&hvcsd->lock, flags);
spin_unlock(&hvcs_structs_lock);
return hvcsd;
@@ -1138,8 +1134,8 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
if ((retval = hvcs_partner_connect(hvcsd)))
goto error_release;
- hvcsd->open_count = 1;
- hvcsd->tty = tty;
+ hvcsd->port.count = 1;
+ hvcsd->port.tty = tty;
tty->driver_data = hvcsd;
memset(&hvcsd->buffer[0], 0x00, HVCS_BUFF_LEN);
@@ -1160,7 +1156,7 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
* and will grab the spinlock and free the connection if it fails.
*/
if (((rc = hvcs_enable_device(hvcsd, unit_address, irq, vdev)))) {
- kref_put(&hvcsd->kref, destroy_hvcs_struct);
+ tty_port_put(&hvcsd->port);
printk(KERN_WARNING "HVCS: enable device failed.\n");
return rc;
}
@@ -1171,8 +1167,8 @@ fast_open:
hvcsd = tty->driver_data;
spin_lock_irqsave(&hvcsd->lock, flags);
- kref_get(&hvcsd->kref);
- hvcsd->open_count++;
+ tty_port_get(&hvcsd->port);
+ hvcsd->port.count++;
hvcsd->todo_mask |= HVCS_SCHED_READ;
spin_unlock_irqrestore(&hvcsd->lock, flags);
@@ -1186,7 +1182,7 @@ open_success:
error_release:
spin_unlock_irqrestore(&hvcsd->lock, flags);
- kref_put(&hvcsd->kref, destroy_hvcs_struct);
+ tty_port_put(&hvcsd->port);
printk(KERN_WARNING "HVCS: partner connect failed.\n");
return retval;
@@ -1216,7 +1212,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
hvcsd = tty->driver_data;
spin_lock_irqsave(&hvcsd->lock, flags);
- if (--hvcsd->open_count == 0) {
+ if (--hvcsd->port.count == 0) {
vio_disable_interrupts(hvcsd->vdev);
@@ -1225,7 +1221,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
* execute any operations on the TTY even though it is obligated
* to deliver any pending I/O to the hypervisor.
*/
- hvcsd->tty = NULL;
+ hvcsd->port.tty = NULL;
irq = hvcsd->vdev->irq;
spin_unlock_irqrestore(&hvcsd->lock, flags);
@@ -1240,16 +1236,16 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
tty->driver_data = NULL;
free_irq(irq, hvcsd);
- kref_put(&hvcsd->kref, destroy_hvcs_struct);
+ tty_port_put(&hvcsd->port);
return;
- } else if (hvcsd->open_count < 0) {
+ } else if (hvcsd->port.count < 0) {
printk(KERN_ERR "HVCS: vty-server@%X open_count: %d"
" is missmanaged.\n",
- hvcsd->vdev->unit_address, hvcsd->open_count);
+ hvcsd->vdev->unit_address, hvcsd->port.count);
}
spin_unlock_irqrestore(&hvcsd->lock, flags);
- kref_put(&hvcsd->kref, destroy_hvcs_struct);
+ tty_port_put(&hvcsd->port);
}
static void hvcs_hangup(struct tty_struct * tty)
@@ -1261,7 +1257,7 @@ static void hvcs_hangup(struct tty_struct * tty)
spin_lock_irqsave(&hvcsd->lock, flags);
/* Preserve this so that we know how many kref refs to put */
- temp_open_count = hvcsd->open_count;
+ temp_open_count = hvcsd->port.count;
/*
* Don't kref put inside the spinlock because the destruction
@@ -1273,10 +1269,10 @@ static void hvcs_hangup(struct tty_struct * tty)
hvcsd->todo_mask = 0;
/* I don't think the tty needs the hvcs_struct pointer after a hangup */
- hvcsd->tty->driver_data = NULL;
- hvcsd->tty = NULL;
+ tty->driver_data = NULL;
+ hvcsd->port.tty = NULL;
- hvcsd->open_count = 0;
+ hvcsd->port.count = 0;
/* This will drop any buffered data on the floor which is OK in a hangup
* scenario. */
@@ -1301,7 +1297,7 @@ static void hvcs_hangup(struct tty_struct * tty)
* NOTE: If this hangup was signaled from user space then the
* final put will never happen.
*/
- kref_put(&hvcsd->kref, destroy_hvcs_struct);
+ tty_port_put(&hvcsd->port);
}
}
@@ -1347,7 +1343,7 @@ static int hvcs_write(struct tty_struct *tty,
* the middle of a write operation? This is a crummy place to do this
* but we want to keep it all in the spinlock.
*/
- if (hvcsd->open_count <= 0) {
+ if (hvcsd->port.count <= 0) {
spin_unlock_irqrestore(&hvcsd->lock, flags);
return -ENODEV;
}
@@ -1421,7 +1417,7 @@ static int hvcs_write_room(struct tty_struct *tty)
{
struct hvcs_struct *hvcsd = tty->driver_data;
- if (!hvcsd || hvcsd->open_count <= 0)
+ if (!hvcsd || hvcsd->port.count <= 0)
return 0;
return HVCS_BUFF_LEN - hvcsd->chars_in_buffer;
diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c
index a7488b7..6f5bc49 100644
--- a/drivers/tty/hvc/hvsi.c
+++ b/drivers/tty/hvc/hvsi.c
@@ -69,14 +69,13 @@
#define __ALIGNED__ __attribute__((__aligned__(sizeof(long))))
struct hvsi_struct {
+ struct tty_port port;
struct delayed_work writer;
struct work_struct handshaker;
wait_queue_head_t emptyq; /* woken when outbuf is emptied */
wait_queue_head_t stateq; /* woken when HVSI state changes */
spinlock_t lock;
int index;
- struct tty_struct *tty;
- int count;
uint8_t throttle_buf[128];
uint8_t outbuf[N_OUTBUF]; /* to implement write_room and chars_in_buffer */
/* inbuf is for packet reassembly. leave a little room for leftovers. */
@@ -237,7 +236,7 @@ static int hvsi_read(struct hvsi_struct *hp, char *buf, int count)
}
static void hvsi_recv_control(struct hvsi_struct *hp, uint8_t *packet,
- struct tty_struct **to_hangup, struct hvsi_struct **to_handshake)
+ struct tty_struct *tty, struct hvsi_struct **to_handshake)
{
struct hvsi_control *header = (struct hvsi_control *)packet;
@@ -247,9 +246,8 @@ static void hvsi_recv_control(struct hvsi_struct *hp, uint8_t *packet,
/* CD went away; no more connection */
pr_debug("hvsi%i: CD dropped\n", hp->index);
hp->mctrl &= TIOCM_CD;
- /* If userland hasn't done an open(2) yet, hp->tty is NULL. */
- if (hp->tty && !(hp->tty->flags & CLOCAL))
- *to_hangup = hp->tty;
+ if (tty && !C_CLOCAL(tty))
+ tty_hangup(tty);
}
break;
case VSV_CLOSE_PROTOCOL:
@@ -331,7 +329,8 @@ static void hvsi_recv_query(struct hvsi_struct *hp, uint8_t *packet)
}
}
-static void hvsi_insert_chars(struct hvsi_struct *hp, const char *buf, int len)
+static void hvsi_insert_chars(struct hvsi_struct *hp, struct tty_struct *tty,
+ const char *buf, int len)
{
int i;
@@ -347,7 +346,7 @@ static void hvsi_insert_chars(struct hvsi_struct *hp, const char *buf, int len)
continue;
}
#endif /* CONFIG_MAGIC_SYSRQ */
- tty_insert_flip_char(hp->tty, c, 0);
+ tty_insert_flip_char(tty, c, 0);
}
}
@@ -360,7 +359,7 @@ static void hvsi_insert_chars(struct hvsi_struct *hp, const char *buf, int len)
* revisited.
*/
#define TTY_THRESHOLD_THROTTLE 128
-static struct tty_struct *hvsi_recv_data(struct hvsi_struct *hp,
+static bool hvsi_recv_data(struct hvsi_struct *hp, struct tty_struct *tty,
const uint8_t *packet)
{
const struct hvsi_header *header = (const struct hvsi_header *)packet;
@@ -371,14 +370,14 @@ static struct tty_struct *hvsi_recv_data(struct hvsi_struct *hp,
pr_debug("queueing %i chars '%.*s'\n", datalen, datalen, data);
if (datalen == 0)
- return NULL;
+ return false;
if (overflow > 0) {
pr_debug("%s: got >TTY_THRESHOLD_THROTTLE bytes\n", __func__);
datalen = TTY_THRESHOLD_THROTTLE;
}
- hvsi_insert_chars(hp, data, datalen);
+ hvsi_insert_chars(hp, tty, data, datalen);
if (overflow > 0) {
/*
@@ -390,7 +389,7 @@ static struct tty_struct *hvsi_recv_data(struct hvsi_struct *hp,
hp->n_throttle = overflow;
}
- return hp->tty;
+ return true;
}
/*
@@ -399,14 +398,13 @@ static struct tty_struct *hvsi_recv_data(struct hvsi_struct *hp,
* machine during console handshaking (in which case tty = NULL and we ignore
* incoming data).
*/
-static int hvsi_load_chunk(struct hvsi_struct *hp, struct tty_struct **flip,
- struct tty_struct **hangup, struct hvsi_struct **handshake)
+static int hvsi_load_chunk(struct hvsi_struct *hp, struct tty_struct *tty,
+ struct hvsi_struct **handshake)
{
uint8_t *packet = hp->inbuf;
int chunklen;
+ bool flip = false;
- *flip = NULL;
- *hangup = NULL;
*handshake = NULL;
chunklen = hvsi_read(hp, hp->inbuf_end, HVSI_MAX_READ);
@@ -440,12 +438,12 @@ static int hvsi_load_chunk(struct hvsi_struct *hp, struct tty_struct **flip,
case VS_DATA_PACKET_HEADER:
if (!is_open(hp))
break;
- if (hp->tty == NULL)
+ if (tty == NULL)
break; /* no tty buffer to put data in */
- *flip = hvsi_recv_data(hp, packet);
+ flip = hvsi_recv_data(hp, tty, packet);
break;
case VS_CONTROL_PACKET_HEADER:
- hvsi_recv_control(hp, packet, hangup, handshake);
+ hvsi_recv_control(hp, packet, tty, handshake);
break;
case VS_QUERY_RESPONSE_PACKET_HEADER:
hvsi_recv_response(hp, packet);
@@ -462,28 +460,26 @@ static int hvsi_load_chunk(struct hvsi_struct *hp, struct tty_struct **flip,
packet += len_packet(packet);
- if (*hangup || *handshake) {
- pr_debug("%s: hangup or handshake\n", __func__);
- /*
- * we need to send the hangup now before receiving any more data.
- * If we get "data, hangup, data", we can't deliver the second
- * data before the hangup.
- */
+ if (*handshake) {
+ pr_debug("%s: handshake\n", __func__);
break;
}
}
compact_inbuf(hp, packet);
+ if (flip)
+ tty_flip_buffer_push(tty);
+
return 1;
}
-static void hvsi_send_overflow(struct hvsi_struct *hp)
+static void hvsi_send_overflow(struct hvsi_struct *hp, struct tty_struct *tty)
{
pr_debug("%s: delivering %i bytes overflow\n", __func__,
hp->n_throttle);
- hvsi_insert_chars(hp, hp->throttle_buf, hp->n_throttle);
+ hvsi_insert_chars(hp, tty, hp->throttle_buf, hp->n_throttle);
hp->n_throttle = 0;
}
@@ -494,35 +490,20 @@ static void hvsi_send_overflow(struct hvsi_struct *hp)
static irqreturn_t hvsi_interrupt(int irq, void *arg)
{
struct hvsi_struct *hp = (struct hvsi_struct *)arg;
- struct tty_struct *flip;
- struct tty_struct *hangup;
struct hvsi_struct *handshake;
+ struct tty_struct *tty;
unsigned long flags;
int again = 1;
pr_debug("%s\n", __func__);
+ tty = tty_port_tty_get(&hp->port);
+
while (again) {
spin_lock_irqsave(&hp->lock, flags);
- again = hvsi_load_chunk(hp, &flip, &hangup, &handshake);
+ again = hvsi_load_chunk(hp, tty, &handshake);
spin_unlock_irqrestore(&hp->lock, flags);
- /*
- * we have to call tty_flip_buffer_push() and tty_hangup() outside our
- * spinlock. But we also have to keep going until we've read all the
- * available data.
- */
-
- if (flip) {
- /* there was data put in the tty flip buffer */
- tty_flip_buffer_push(flip);
- flip = NULL;
- }
-
- if (hangup) {
- tty_hangup(hangup);
- }
-
if (handshake) {
pr_debug("hvsi%i: attempting re-handshake\n", handshake->index);
schedule_work(&handshake->handshaker);
@@ -530,18 +511,15 @@ static irqreturn_t hvsi_interrupt(int irq, void *arg)
}
spin_lock_irqsave(&hp->lock, flags);
- if (hp->tty && hp->n_throttle
- && (!test_bit(TTY_THROTTLED, &hp->tty->flags))) {
- /* we weren't hung up and we weren't throttled, so we can deliver the
- * rest now */
- flip = hp->tty;
- hvsi_send_overflow(hp);
+ if (tty && hp->n_throttle && !test_bit(TTY_THROTTLED, &tty->flags)) {
+ /* we weren't hung up and we weren't throttled, so we can
+ * deliver the rest now */
+ hvsi_send_overflow(hp, tty);
+ tty_flip_buffer_push(tty);
}
spin_unlock_irqrestore(&hp->lock, flags);
- if (flip) {
- tty_flip_buffer_push(flip);
- }
+ tty_kref_put(tty);
return IRQ_HANDLED;
}
@@ -749,9 +727,9 @@ static int hvsi_open(struct tty_struct *tty, struct file *filp)
if (hp->state == HVSI_FSP_DIED)
return -EIO;
+ tty_port_tty_set(&hp->port, tty);
spin_lock_irqsave(&hp->lock, flags);
- hp->tty = tty;
- hp->count++;
+ hp->port.count++;
atomic_set(&hp->seqno, 0);
h_vio_signal(hp->vtermno, VIO_IRQ_ENABLE);
spin_unlock_irqrestore(&hp->lock, flags);
@@ -808,8 +786,8 @@ static void hvsi_close(struct tty_struct *tty, struct file *filp)
spin_lock_irqsave(&hp->lock, flags);
- if (--hp->count == 0) {
- hp->tty = NULL;
+ if (--hp->port.count == 0) {
+ tty_port_tty_set(&hp->port, NULL);
hp->inbuf_end = hp->inbuf; /* discard remaining partial packets */
/* only close down connection if it is not the console */
@@ -841,9 +819,9 @@ static void hvsi_close(struct tty_struct *tty, struct file *filp)
spin_lock_irqsave(&hp->lock, flags);
}
- } else if (hp->count < 0)
+ } else if (hp->port.count < 0)
printk(KERN_ERR "hvsi_close %lu: oops, count is %d\n",
- hp - hvsi_ports, hp->count);
+ hp - hvsi_ports, hp->port.count);
spin_unlock_irqrestore(&hp->lock, flags);
}
@@ -855,12 +833,11 @@ static void hvsi_hangup(struct tty_struct *tty)
pr_debug("%s\n", __func__);
- spin_lock_irqsave(&hp->lock, flags);
+ tty_port_tty_set(&hp->port, NULL);
- hp->count = 0;
+ spin_lock_irqsave(&hp->lock, flags);
+ hp->port.count = 0;
hp->n_outbuf = 0;
- hp->tty = NULL;
-
spin_unlock_irqrestore(&hp->lock, flags);
}
@@ -888,6 +865,7 @@ static void hvsi_write_worker(struct work_struct *work)
{
struct hvsi_struct *hp =
container_of(work, struct hvsi_struct, writer.work);
+ struct tty_struct *tty;
unsigned long flags;
#ifdef DEBUG
static long start_j = 0;
@@ -921,7 +899,11 @@ static void hvsi_write_worker(struct work_struct *work)
start_j = 0;
#endif /* DEBUG */
wake_up_all(&hp->emptyq);
- tty_wakeup(hp->tty);
+ tty = tty_port_tty_get(&hp->port);
+ if (tty) {
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+ }
}
out:
@@ -966,8 +948,8 @@ static int hvsi_write(struct tty_struct *tty,
* and hvsi_write_worker will be scheduled. subsequent hvsi_write() calls
* will see there is no room in outbuf and return.
*/
- while ((count > 0) && (hvsi_write_room(hp->tty) > 0)) {
- int chunksize = min(count, hvsi_write_room(hp->tty));
+ while ((count > 0) && (hvsi_write_room(tty) > 0)) {
+ int chunksize = min(count, hvsi_write_room(tty));
BUG_ON(hp->n_outbuf < 0);
memcpy(hp->outbuf + hp->n_outbuf, source, chunksize);
@@ -1014,19 +996,16 @@ static void hvsi_unthrottle(struct tty_struct *tty)
{
struct hvsi_struct *hp = tty->driver_data;
unsigned long flags;
- int shouldflip = 0;
pr_debug("%s\n", __func__);
spin_lock_irqsave(&hp->lock, flags);
if (hp->n_throttle) {
- hvsi_send_overflow(hp);
- shouldflip = 1;
+ hvsi_send_overflow(hp, tty);
+ tty_flip_buffer_push(tty);
}
spin_unlock_irqrestore(&hp->lock, flags);
- if (shouldflip)
- tty_flip_buffer_push(hp->tty);
h_vio_signal(hp->vtermno, VIO_IRQ_ENABLE);
}
@@ -1228,6 +1207,7 @@ static int __init hvsi_console_init(void)
init_waitqueue_head(&hp->emptyq);
init_waitqueue_head(&hp->stateq);
spin_lock_init(&hp->lock);
+ tty_port_init(&hp->port);
hp->index = hvsi_count;
hp->inbuf_end = hp->inbuf;
hp->state = HVSI_CLOSED;
diff --git a/drivers/tty/hvc/hvsi_lib.c b/drivers/tty/hvc/hvsi_lib.c
index 6f4dd83..59c135d 100644
--- a/drivers/tty/hvc/hvsi_lib.c
+++ b/drivers/tty/hvc/hvsi_lib.c
@@ -377,7 +377,7 @@ int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp)
pr_devel("HVSI@%x: open !\n", pv->termno);
/* Keep track of the tty data structure */
- pv->tty = tty_kref_get(hp->tty);
+ pv->tty = tty_port_tty_get(&hp->port);
hvsilib_establish(pv);
diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c
index 4daf962..f8b5fa0 100644
--- a/drivers/tty/ipwireless/tty.c
+++ b/drivers/tty/ipwireless/tty.c
@@ -44,14 +44,13 @@
#define TTYTYPE_RAS_RAW (2)
struct ipw_tty {
+ struct tty_port port;
int index;
struct ipw_hardware *hardware;
unsigned int channel_idx;
unsigned int secondary_channel_idx;
int tty_type;
struct ipw_network *network;
- struct tty_struct *linux_tty;
- int open_count;
unsigned int control_lines;
struct mutex ipw_tty_mutex;
int tx_bytes_queued;
@@ -73,23 +72,6 @@ static char *tty_type_name(int tty_type)
return channel_names[tty_type];
}
-static void report_registering(struct ipw_tty *tty)
-{
- char *iftype = tty_type_name(tty->tty_type);
-
- printk(KERN_INFO IPWIRELESS_PCCARD_NAME
- ": registering %s device ttyIPWp%d\n", iftype, tty->index);
-}
-
-static void report_deregistering(struct ipw_tty *tty)
-{
- char *iftype = tty_type_name(tty->tty_type);
-
- printk(KERN_INFO IPWIRELESS_PCCARD_NAME
- ": deregistering %s device ttyIPWp%d\n", iftype,
- tty->index);
-}
-
static struct ipw_tty *get_tty(int index)
{
/*
@@ -117,12 +99,12 @@ static int ipw_open(struct tty_struct *linux_tty, struct file *filp)
mutex_unlock(&tty->ipw_tty_mutex);
return -ENODEV;
}
- if (tty->open_count == 0)
+ if (tty->port.count == 0)
tty->tx_bytes_queued = 0;
- tty->open_count++;
+ tty->port.count++;
- tty->linux_tty = linux_tty;
+ tty->port.tty = linux_tty;
linux_tty->driver_data = tty;
linux_tty->low_latency = 1;
@@ -136,13 +118,13 @@ static int ipw_open(struct tty_struct *linux_tty, struct file *filp)
static void do_ipw_close(struct ipw_tty *tty)
{
- tty->open_count--;
+ tty->port.count--;
- if (tty->open_count == 0) {
- struct tty_struct *linux_tty = tty->linux_tty;
+ if (tty->port.count == 0) {
+ struct tty_struct *linux_tty = tty->port.tty;
if (linux_tty != NULL) {
- tty->linux_tty = NULL;
+ tty->port.tty = NULL;
linux_tty->driver_data = NULL;
if (tty->tty_type == TTYTYPE_MODEM)
@@ -159,7 +141,7 @@ static void ipw_hangup(struct tty_struct *linux_tty)
return;
mutex_lock(&tty->ipw_tty_mutex);
- if (tty->open_count == 0) {
+ if (tty->port.count == 0) {
mutex_unlock(&tty->ipw_tty_mutex);
return;
}
@@ -182,13 +164,13 @@ void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data,
int work = 0;
mutex_lock(&tty->ipw_tty_mutex);
- linux_tty = tty->linux_tty;
+ linux_tty = tty->port.tty;
if (linux_tty == NULL) {
mutex_unlock(&tty->ipw_tty_mutex);
return;
}
- if (!tty->open_count) {
+ if (!tty->port.count) {
mutex_unlock(&tty->ipw_tty_mutex);
return;
}
@@ -230,7 +212,7 @@ static int ipw_write(struct tty_struct *linux_tty,
return -ENODEV;
mutex_lock(&tty->ipw_tty_mutex);
- if (!tty->open_count) {
+ if (!tty->port.count) {
mutex_unlock(&tty->ipw_tty_mutex);
return -EINVAL;
}
@@ -270,7 +252,7 @@ static int ipw_write_room(struct tty_struct *linux_tty)
if (!tty)
return -ENODEV;
- if (!tty->open_count)
+ if (!tty->port.count)
return -EINVAL;
room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued;
@@ -312,7 +294,7 @@ static int ipw_chars_in_buffer(struct tty_struct *linux_tty)
if (!tty)
return 0;
- if (!tty->open_count)
+ if (!tty->port.count)
return 0;
return tty->tx_bytes_queued;
@@ -393,7 +375,7 @@ static int ipw_tiocmget(struct tty_struct *linux_tty)
if (!tty)
return -ENODEV;
- if (!tty->open_count)
+ if (!tty->port.count)
return -EINVAL;
return get_control_lines(tty);
@@ -409,7 +391,7 @@ ipw_tiocmset(struct tty_struct *linux_tty,
if (!tty)
return -ENODEV;
- if (!tty->open_count)
+ if (!tty->port.count)
return -EINVAL;
return set_control_lines(tty, set, clear);
@@ -423,7 +405,7 @@ static int ipw_ioctl(struct tty_struct *linux_tty,
if (!tty)
return -ENODEV;
- if (!tty->open_count)
+ if (!tty->port.count)
return -EINVAL;
/* FIXME: Exactly how is the tty object locked here .. */
@@ -492,6 +474,7 @@ static int add_tty(int j,
ttys[j]->network = network;
ttys[j]->tty_type = tty_type;
mutex_init(&ttys[j]->ipw_tty_mutex);
+ tty_port_init(&ttys[j]->port);
tty_register_device(ipw_tty_driver, j, NULL);
ipwireless_associate_network_tty(network, channel_idx, ttys[j]);
@@ -500,8 +483,12 @@ static int add_tty(int j,
ipwireless_associate_network_tty(network,
secondary_channel_idx,
ttys[j]);
- if (get_tty(j) == ttys[j])
- report_registering(ttys[j]);
+ /* check if we provide raw device (if loopback is enabled) */
+ if (get_tty(j))
+ printk(KERN_INFO IPWIRELESS_PCCARD_NAME
+ ": registering %s device ttyIPWp%d\n",
+ tty_type_name(tty_type), j);
+
return 0;
}
@@ -560,19 +547,21 @@ void ipwireless_tty_free(struct ipw_tty *tty)
if (ttyj) {
mutex_lock(&ttyj->ipw_tty_mutex);
- if (get_tty(j) == ttyj)
- report_deregistering(ttyj);
+ if (get_tty(j))
+ printk(KERN_INFO IPWIRELESS_PCCARD_NAME
+ ": deregistering %s device ttyIPWp%d\n",
+ tty_type_name(ttyj->tty_type), j);
ttyj->closing = 1;
- if (ttyj->linux_tty != NULL) {
+ if (ttyj->port.tty != NULL) {
mutex_unlock(&ttyj->ipw_tty_mutex);
- tty_hangup(ttyj->linux_tty);
- /* Wait till the tty_hangup has completed */
- flush_work_sync(&ttyj->linux_tty->hangup_work);
+ tty_vhangup(ttyj->port.tty);
/* FIXME: Exactly how is the tty object locked here
against a parallel ioctl etc */
+ /* FIXME2: hangup does not mean all processes
+ * are gone */
mutex_lock(&ttyj->ipw_tty_mutex);
}
- while (ttyj->open_count)
+ while (ttyj->port.count)
do_ipw_close(ttyj);
ipwireless_disassociate_network_ttys(network,
ttyj->channel_idx);
@@ -661,8 +650,8 @@ ipwireless_tty_notify_control_line_change(struct ipw_tty *tty,
*/
if ((old_control_lines & IPW_CONTROL_LINE_DCD)
&& !(tty->control_lines & IPW_CONTROL_LINE_DCD)
- && tty->linux_tty) {
- tty_hangup(tty->linux_tty);
+ && tty->port.tty) {
+ tty_hangup(tty->port.tty);
}
}
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index c6f372d..90cc680 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -2326,7 +2326,7 @@ static const struct tty_operations mxser_ops = {
.get_icount = mxser_get_icount,
};
-struct tty_port_operations mxser_port_ops = {
+static struct tty_port_operations mxser_port_ops = {
.carrier_raised = mxser_carrier_raised,
.dtr_rts = mxser_dtr_rts,
.activate = mxser_activate,
diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c
index 5c6c314..656ad93 100644
--- a/drivers/tty/n_r3964.c
+++ b/drivers/tty/n_r3964.c
@@ -1065,7 +1065,8 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
TRACE_L("read()");
- tty_lock();
+ /* FIXME: should use a private lock */
+ tty_lock(tty);
pClient = findClient(pInfo, task_pid(current));
if (pClient) {
@@ -1077,7 +1078,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
goto unlock;
}
/* block until there is a message: */
- wait_event_interruptible_tty(pInfo->read_wait,
+ wait_event_interruptible_tty(tty, pInfo->read_wait,
(pMsg = remove_msg(pInfo, pClient)));
}
@@ -1107,7 +1108,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
}
ret = -EPERM;
unlock:
- tty_unlock();
+ tty_unlock(tty);
return ret;
}
@@ -1156,7 +1157,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
pHeader->locks = 0;
pHeader->owner = NULL;
- tty_lock();
+ tty_lock(tty);
pClient = findClient(pInfo, task_pid(current));
if (pClient) {
@@ -1175,7 +1176,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
add_tx_queue(pInfo, pHeader);
trigger_transmit(pInfo);
- tty_unlock();
+ tty_unlock(tty);
return 0;
}
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 94b6eda..ee1c268 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1630,6 +1630,7 @@ static int copy_from_read_buf(struct tty_struct *tty,
int retval;
size_t n;
unsigned long flags;
+ bool is_eof;
retval = 0;
spin_lock_irqsave(&tty->read_lock, flags);
@@ -1639,15 +1640,15 @@ static int copy_from_read_buf(struct tty_struct *tty,
if (n) {
retval = copy_to_user(*b, &tty->read_buf[tty->read_tail], n);
n -= retval;
+ is_eof = n == 1 &&
+ tty->read_buf[tty->read_tail] == EOF_CHAR(tty);
tty_audit_add_data(tty, &tty->read_buf[tty->read_tail], n);
spin_lock_irqsave(&tty->read_lock, flags);
tty->read_tail = (tty->read_tail + n) & (N_TTY_BUF_SIZE-1);
tty->read_cnt -= n;
/* Turn single EOF into zero-length read */
- if (L_EXTPROC(tty) && tty->icanon && n == 1) {
- if (!tty->read_cnt && (*b)[n-1] == EOF_CHAR(tty))
- n--;
- }
+ if (L_EXTPROC(tty) && tty->icanon && is_eof && !tty->read_cnt)
+ n = 0;
spin_unlock_irqrestore(&tty->read_lock, flags);
*b += n;
*nr -= n;
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index eeae7fa..59af394 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -26,11 +26,13 @@
#include <linux/bitops.h>
#include <linux/devpts_fs.h>
#include <linux/slab.h>
+#include <linux/mutex.h>
#ifdef CONFIG_UNIX98_PTYS
static struct tty_driver *ptm_driver;
static struct tty_driver *pts_driver;
+static DEFINE_MUTEX(devpts_mutex);
#endif
static void pty_close(struct tty_struct *tty, struct file *filp)
@@ -45,6 +47,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
wake_up_interruptible(&tty->read_wait);
wake_up_interruptible(&tty->write_wait);
tty->packet = 0;
+ /* Review - krefs on tty_link ?? */
if (!tty->link)
return;
tty->link->packet = 0;
@@ -54,12 +57,15 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
if (tty->driver->subtype == PTY_TYPE_MASTER) {
set_bit(TTY_OTHER_CLOSED, &tty->flags);
#ifdef CONFIG_UNIX98_PTYS
- if (tty->driver == ptm_driver)
+ if (tty->driver == ptm_driver) {
+ mutex_lock(&devpts_mutex);
devpts_pty_kill(tty->link);
+ mutex_unlock(&devpts_mutex);
+ }
#endif
- tty_unlock();
+ tty_unlock(tty);
tty_vhangup(tty->link);
- tty_lock();
+ tty_lock(tty);
}
}
@@ -475,13 +481,17 @@ static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver,
* @idx: tty index
*
* Look up a pty master device. Called under the tty_mutex for now.
- * This provides our locking.
+ * This provides our locking for the tty pointer.
*/
static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver,
struct inode *pts_inode, int idx)
{
- struct tty_struct *tty = devpts_get_tty(pts_inode, idx);
+ struct tty_struct *tty;
+
+ mutex_lock(&devpts_mutex);
+ tty = devpts_get_tty(pts_inode, idx);
+ mutex_unlock(&devpts_mutex);
/* Master must be open before slave */
if (!tty)
return ERR_PTR(-EIO);
@@ -613,24 +623,29 @@ static int ptmx_open(struct inode *inode, struct file *filp)
return retval;
/* find a device that is not in use. */
- tty_lock();
+ mutex_lock(&devpts_mutex);
index = devpts_new_index(inode);
- tty_unlock();
if (index < 0) {
retval = index;
goto err_file;
}
+ mutex_unlock(&devpts_mutex);
+
mutex_lock(&tty_mutex);
- tty_lock();
+ mutex_lock(&devpts_mutex);
tty = tty_init_dev(ptm_driver, index);
- mutex_unlock(&tty_mutex);
if (IS_ERR(tty)) {
retval = PTR_ERR(tty);
goto out;
}
+ /* The tty returned here is locked so we can safely
+ drop the mutex */
+ mutex_unlock(&devpts_mutex);
+ mutex_unlock(&tty_mutex);
+
set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
tty_add_file(tty, filp);
@@ -643,16 +658,17 @@ static int ptmx_open(struct inode *inode, struct file *filp)
if (retval)
goto err_release;
- tty_unlock();
+ tty_unlock(tty);
return 0;
err_release:
- tty_unlock();
+ tty_unlock(tty);
tty_release(inode, filp);
return retval;
out:
+ mutex_unlock(&tty_mutex);
devpts_kill_index(inode, index);
- tty_unlock();
err_file:
+ mutex_unlock(&devpts_mutex);
tty_free_file(filp);
return retval;
}
diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
index 5ce78252..3ed20e4 100644
--- a/drivers/tty/serial/68328serial.c
+++ b/drivers/tty/serial/68328serial.c
@@ -17,6 +17,7 @@
#include <asm/dbg.h>
#include <linux/module.h>
#include <linux/errno.h>
+#include <linux/serial.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
@@ -56,8 +57,6 @@
#endif /* CONFIG_M68VZ328 */
#endif /* CONFIG_M68EZ328 */
-#include "68328serial.h"
-
/* Turn off usage of real serial interrupt code, to "support" Copilot */
#ifdef CONFIG_XCOPILOT_BUGS
#undef USE_INTS
@@ -65,33 +64,82 @@
#define USE_INTS
#endif
-static struct m68k_serial m68k_soft[NR_PORTS];
+/*
+ * I believe this is the optimal setting that reduces the number of interrupts.
+ * At high speeds the output might become a little "bursted" (use USTCNT_TXHE
+ * if that bothers you), but in most cases it will not, since we try to
+ * transmit characters every time rs_interrupt is called. Thus, quite often
+ * you'll see that a receive interrupt occures before the transmit one.
+ * -- Vladimir Gurevich
+ */
+#define USTCNT_TX_INTR_MASK (USTCNT_TXEE)
-static unsigned int uart_irqs[NR_PORTS] = UART_IRQ_DEFNS;
+/*
+ * 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special
+ * "Old data interrupt" which occures whenever the data stay in the FIFO
+ * longer than 30 bits time. This allows us to use FIFO without compromising
+ * latency. '328 does not have this feature and without the real 328-based
+ * board I would assume that RXRE is the safest setting.
+ *
+ * For EZ328 I use RXHE (Half empty) interrupt to reduce the number of
+ * interrupts. RXFE (receive queue full) causes the system to lose data
+ * at least at 115200 baud
+ *
+ * If your board is busy doing other stuff, you might consider to use
+ * RXRE (data ready intrrupt) instead.
+ *
+ * The other option is to make these INTR masks run-time configurable, so
+ * that people can dynamically adapt them according to the current usage.
+ * -- Vladimir Gurevich
+ */
-/* multiple ports are contiguous in memory */
-m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR;
+/* (es) */
+#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328)
+#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN)
+#elif defined(CONFIG_M68328)
+#define USTCNT_RX_INTR_MASK (USTCNT_RXRE)
+#else
+#error Please, define the Rx interrupt events for your CPU
+#endif
+/* (/es) */
-struct tty_struct m68k_ttys;
-struct m68k_serial *m68k_consinfo = 0;
+/*
+ * This is our internal structure for each serial port's state.
+ */
+struct m68k_serial {
+ struct tty_port tport;
+ char is_cons; /* Is this our console. */
+ int magic;
+ int baud_base;
+ int port;
+ int irq;
+ int type; /* UART type */
+ int custom_divisor;
+ int x_char; /* xon/xoff character */
+ int line;
+ unsigned char *xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+};
-#define M68K_CLOCK (16667000) /* FIXME: 16MHz is likely wrong */
+#define SERIAL_MAGIC 0x5301
-struct tty_driver *serial_driver;
+/*
+ * Define the number of ports supported and their irqs.
+ */
+#define NR_PORTS 1
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
+static struct m68k_serial m68k_soft[NR_PORTS];
-/* Debugging... DEBUG_INTR is bad to use when one of the zs
- * lines is your console ;(
- */
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
+static unsigned int uart_irqs[NR_PORTS] = { UART_IRQ_NUM };
-#define RS_ISR_PASS_LIMIT 256
+/* multiple ports are contiguous in memory */
+m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR;
+
+struct tty_driver *serial_driver;
-static void change_speed(struct m68k_serial *info);
+static void change_speed(struct m68k_serial *info, struct tty_struct *tty);
/*
* Setup for console. Argument comes from the boot command line.
@@ -143,17 +191,6 @@ static int baud_table[] = {
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
9600, 19200, 38400, 57600, 115200, 0 };
-/* Sets or clears DTR/RTS on the requested line */
-static inline void m68k_rtsdtr(struct m68k_serial *ss, int set)
-{
- if (set) {
- /* set the RTS/CTS line */
- } else {
- /* clear it */
- }
- return;
-}
-
/* Utility routines */
static inline int get_baud(struct m68k_serial *ss)
{
@@ -189,7 +226,8 @@ static void rs_stop(struct tty_struct *tty)
static int rs_put_char(char ch)
{
- int flags, loops = 0;
+ unsigned long flags;
+ int loops = 0;
local_irq_save(flags);
@@ -224,28 +262,9 @@ static void rs_start(struct tty_struct *tty)
local_irq_restore(flags);
}
-/* Drop into either the boot monitor or kadb upon receiving a break
- * from keyboard/console input.
- */
-static void batten_down_hatches(void)
-{
- /* Drop into the debugger */
-}
-
-static void status_handle(struct m68k_serial *info, unsigned short status)
+static void receive_chars(struct m68k_serial *info, struct tty_struct *tty,
+ unsigned short rx)
{
- /* If this is console input and this is a
- * 'break asserted' status change interrupt
- * see if we can drop into the debugger
- */
- if((status & URX_BREAK) && info->break_abort)
- batten_down_hatches();
- return;
-}
-
-static void receive_chars(struct m68k_serial *info, unsigned short rx)
-{
- struct tty_struct *tty = info->tty;
m68328_uart *uart = &uart_addr[info->line];
unsigned char ch, flag;
@@ -259,7 +278,6 @@ static void receive_chars(struct m68k_serial *info, unsigned short rx)
if(info->is_cons) {
if(URX_BREAK & rx) { /* whee, break received */
- status_handle(info, rx);
return;
#ifdef CONFIG_MAGIC_SYSRQ
} else if (ch == 0x10) { /* ^P */
@@ -280,16 +298,13 @@ static void receive_chars(struct m68k_serial *info, unsigned short rx)
flag = TTY_NORMAL;
- if(rx & URX_PARITY_ERROR) {
+ if (rx & URX_PARITY_ERROR)
flag = TTY_PARITY;
- status_handle(info, rx);
- } else if(rx & URX_OVRUN) {
+ else if (rx & URX_OVRUN)
flag = TTY_OVERRUN;
- status_handle(info, rx);
- } else if(rx & URX_FRAME_ERROR) {
+ else if (rx & URX_FRAME_ERROR)
flag = TTY_FRAME;
- status_handle(info, rx);
- }
+
tty_insert_flip_char(tty, ch, flag);
#ifndef CONFIG_XCOPILOT_BUGS
} while((rx = uart->urx.w) & URX_DATA_READY);
@@ -301,7 +316,7 @@ clear_and_exit:
return;
}
-static void transmit_chars(struct m68k_serial *info)
+static void transmit_chars(struct m68k_serial *info, struct tty_struct *tty)
{
m68328_uart *uart = &uart_addr[info->line];
@@ -312,7 +327,7 @@ static void transmit_chars(struct m68k_serial *info)
goto clear_and_return;
}
- if((info->xmit_cnt <= 0) || info->tty->stopped) {
+ if ((info->xmit_cnt <= 0) || !tty || tty->stopped) {
/* That's peculiar... TX ints off */
uart->ustcnt &= ~USTCNT_TX_INTR_MASK;
goto clear_and_return;
@@ -340,6 +355,7 @@ clear_and_return:
irqreturn_t rs_interrupt(int irq, void *dev_id)
{
struct m68k_serial *info = dev_id;
+ struct tty_struct *tty = tty_port_tty_get(&info->tport);
m68328_uart *uart;
unsigned short rx;
unsigned short tx;
@@ -350,20 +366,24 @@ irqreturn_t rs_interrupt(int irq, void *dev_id)
#ifdef USE_INTS
tx = uart->utx.w;
- if (rx & URX_DATA_READY) receive_chars(info, rx);
- if (tx & UTX_TX_AVAIL) transmit_chars(info);
+ if (rx & URX_DATA_READY)
+ receive_chars(info, tty, rx);
+ if (tx & UTX_TX_AVAIL)
+ transmit_chars(info, tty);
#else
- receive_chars(info, rx);
+ receive_chars(info, tty, rx);
#endif
+ tty_kref_put(tty);
+
return IRQ_HANDLED;
}
-static int startup(struct m68k_serial * info)
+static int startup(struct m68k_serial *info, struct tty_struct *tty)
{
m68328_uart *uart = &uart_addr[info->line];
unsigned long flags;
- if (info->flags & S_INITIALIZED)
+ if (info->tport.flags & ASYNC_INITIALIZED)
return 0;
if (!info->xmit_buf) {
@@ -380,7 +400,6 @@ static int startup(struct m68k_serial * info)
*/
uart->ustcnt = USTCNT_UEN;
- info->xmit_fifo_size = 1;
uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_TXEN;
(void)uart->urx.w;
@@ -394,17 +413,17 @@ static int startup(struct m68k_serial * info)
uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_RX_INTR_MASK;
#endif
- if (info->tty)
- clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ if (tty)
+ clear_bit(TTY_IO_ERROR, &tty->flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
/*
* and set the speed of the serial port
*/
- change_speed(info);
+ change_speed(info, tty);
- info->flags |= S_INITIALIZED;
+ info->tport.flags |= ASYNC_INITIALIZED;
local_irq_restore(flags);
return 0;
}
@@ -413,13 +432,13 @@ static int startup(struct m68k_serial * info)
* This routine will shutdown a serial port; interrupts are disabled, and
* DTR is dropped if the hangup on close termio flag is on.
*/
-static void shutdown(struct m68k_serial * info)
+static void shutdown(struct m68k_serial *info, struct tty_struct *tty)
{
m68328_uart *uart = &uart_addr[info->line];
unsigned long flags;
uart->ustcnt = 0; /* All off! */
- if (!(info->flags & S_INITIALIZED))
+ if (!(info->tport.flags & ASYNC_INITIALIZED))
return;
local_irq_save(flags);
@@ -429,10 +448,10 @@ static void shutdown(struct m68k_serial * info)
info->xmit_buf = 0;
}
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
+ if (tty)
+ set_bit(TTY_IO_ERROR, &tty->flags);
- info->flags &= ~S_INITIALIZED;
+ info->tport.flags &= ~ASYNC_INITIALIZED;
local_irq_restore(flags);
}
@@ -488,7 +507,7 @@ struct {
* This routine is called to set the UART divisor registers to match
* the specified baud rate for a serial port.
*/
-static void change_speed(struct m68k_serial *info)
+static void change_speed(struct m68k_serial *info, struct tty_struct *tty)
{
m68328_uart *uart = &uart_addr[info->line];
unsigned short port;
@@ -496,9 +515,7 @@ static void change_speed(struct m68k_serial *info)
unsigned cflag;
int i;
- if (!info->tty || !info->tty->termios)
- return;
- cflag = info->tty->termios->c_cflag;
+ cflag = tty->termios->c_cflag;
if (!(port = info->port))
return;
@@ -510,7 +527,6 @@ static void change_speed(struct m68k_serial *info)
i = (i & ~CBAUDEX) + B38400;
}
- info->baud = baud_table[i];
uart->ubaud = PUT_FIELD(UBAUD_DIVIDE, hw_baud_table[i].divisor) |
PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale);
@@ -807,10 +823,10 @@ static int get_serial_info(struct m68k_serial * info,
tmp.line = info->line;
tmp.port = info->port;
tmp.irq = info->irq;
- tmp.flags = info->flags;
+ tmp.flags = info->tport.flags;
tmp.baud_base = info->baud_base;
- tmp.close_delay = info->close_delay;
- tmp.closing_wait = info->closing_wait;
+ tmp.close_delay = info->tport.close_delay;
+ tmp.closing_wait = info->tport.closing_wait;
tmp.custom_divisor = info->custom_divisor;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
@@ -818,9 +834,10 @@ static int get_serial_info(struct m68k_serial * info,
return 0;
}
-static int set_serial_info(struct m68k_serial * info,
+static int set_serial_info(struct m68k_serial *info, struct tty_struct *tty,
struct serial_struct * new_info)
{
+ struct tty_port *port = &info->tport;
struct serial_struct new_serial;
struct m68k_serial old_info;
int retval = 0;
@@ -834,17 +851,17 @@ static int set_serial_info(struct m68k_serial * info,
if (!capable(CAP_SYS_ADMIN)) {
if ((new_serial.baud_base != info->baud_base) ||
(new_serial.type != info->type) ||
- (new_serial.close_delay != info->close_delay) ||
- ((new_serial.flags & ~S_USR_MASK) !=
- (info->flags & ~S_USR_MASK)))
+ (new_serial.close_delay != port->close_delay) ||
+ ((new_serial.flags & ~ASYNC_USR_MASK) !=
+ (port->flags & ~ASYNC_USR_MASK)))
return -EPERM;
- info->flags = ((info->flags & ~S_USR_MASK) |
- (new_serial.flags & S_USR_MASK));
+ port->flags = ((port->flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK));
info->custom_divisor = new_serial.custom_divisor;
goto check_and_exit;
}
- if (info->count > 1)
+ if (port->count > 1)
return -EBUSY;
/*
@@ -853,14 +870,14 @@ static int set_serial_info(struct m68k_serial * info,
*/
info->baud_base = new_serial.baud_base;
- info->flags = ((info->flags & ~S_FLAGS) |
- (new_serial.flags & S_FLAGS));
+ port->flags = ((port->flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS));
info->type = new_serial.type;
- info->close_delay = new_serial.close_delay;
- info->closing_wait = new_serial.closing_wait;
+ port->close_delay = new_serial.close_delay;
+ port->closing_wait = new_serial.closing_wait;
check_and_exit:
- retval = startup(info);
+ retval = startup(info, tty);
return retval;
}
@@ -946,7 +963,7 @@ static int rs_ioctl(struct tty_struct *tty,
return get_serial_info(info,
(struct serial_struct *) arg);
case TIOCSSERIAL:
- return set_serial_info(info,
+ return set_serial_info(info, tty,
(struct serial_struct *) arg);
case TIOCSERGETLSR: /* Get line status register */
return get_lsr_info(info, (unsigned int *) arg);
@@ -965,7 +982,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
{
struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
- change_speed(info);
+ change_speed(info, tty);
if ((old_termios->c_cflag & CRTSCTS) &&
!(tty->termios->c_cflag & CRTSCTS)) {
@@ -988,6 +1005,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
static void rs_close(struct tty_struct *tty, struct file * filp)
{
struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
+ struct tty_port *port = &info->tport;
m68328_uart *uart = &uart_addr[info->line];
unsigned long flags;
@@ -1001,7 +1019,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
return;
}
- if ((tty->count == 1) && (info->count != 1)) {
+ if ((tty->count == 1) && (port->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
@@ -1010,26 +1028,26 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
* serial port won't be shutdown.
*/
printk("rs_close: bad serial port count; tty->count is 1, "
- "info->count is %d\n", info->count);
- info->count = 1;
+ "port->count is %d\n", port->count);
+ port->count = 1;
}
- if (--info->count < 0) {
+ if (--port->count < 0) {
printk("rs_close: bad serial port count for ttyS%d: %d\n",
- info->line, info->count);
- info->count = 0;
+ info->line, port->count);
+ port->count = 0;
}
- if (info->count) {
+ if (port->count) {
local_irq_restore(flags);
return;
}
- info->flags |= S_CLOSING;
+ port->flags |= ASYNC_CLOSING;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
- if (info->closing_wait != S_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
+ if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent(tty, port->closing_wait);
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
@@ -1040,13 +1058,12 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
uart->ustcnt &= ~USTCNT_RXEN;
uart->ustcnt &= ~(USTCNT_RXEN | USTCNT_RX_INTR_MASK);
- shutdown(info);
+ shutdown(info, tty);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
- info->event = 0;
- info->tty = NULL;
+ tty_port_tty_set(&info->tport, NULL);
#warning "This is not and has never been valid so fix it"
#if 0
if (tty->ldisc.num != ldiscs[N_TTY].num) {
@@ -1058,14 +1075,13 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
(tty->ldisc.open)(tty);
}
#endif
- if (info->blocked_open) {
- if (info->close_delay) {
- msleep_interruptible(jiffies_to_msecs(info->close_delay));
- }
- wake_up_interruptible(&info->open_wait);
+ if (port->blocked_open) {
+ if (port->close_delay)
+ msleep_interruptible(jiffies_to_msecs(port->close_delay));
+ wake_up_interruptible(&port->open_wait);
}
- info->flags &= ~(S_NORMAL_ACTIVE|S_CLOSING);
- wake_up_interruptible(&info->close_wait);
+ port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ wake_up_interruptible(&port->close_wait);
local_irq_restore(flags);
}
@@ -1080,107 +1096,14 @@ void rs_hangup(struct tty_struct *tty)
return;
rs_flush_buffer(tty);
- shutdown(info);
- info->event = 0;
- info->count = 0;
- info->flags &= ~S_NORMAL_ACTIVE;
- info->tty = NULL;
- wake_up_interruptible(&info->open_wait);
+ shutdown(info, tty);
+ info->tport.count = 0;
+ info->tport.flags &= ~ASYNC_NORMAL_ACTIVE;
+ tty_port_tty_set(&info->tport, NULL);
+ wake_up_interruptible(&info->tport.open_wait);
}
/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
- struct m68k_serial *info)
-{
- DECLARE_WAITQUEUE(wait, current);
- int retval;
- int do_clocal = 0;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (info->flags & S_CLOSING) {
- interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
- if (info->flags & S_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * If non-blocking mode is set, or the port is not enabled,
- * then make the check up front and then exit.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR))) {
- info->flags |= S_NORMAL_ACTIVE;
- return 0;
- }
-
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
-
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
- * rs_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
- add_wait_queue(&info->open_wait, &wait);
-
- info->count--;
- info->blocked_open++;
- while (1) {
- local_irq_disable();
- m68k_rtsdtr(info, 1);
- local_irq_enable();
- current->state = TASK_INTERRUPTIBLE;
- if (tty_hung_up_p(filp) ||
- !(info->flags & S_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
- if (info->flags & S_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
-#else
- retval = -EAGAIN;
-#endif
- break;
- }
- if (!(info->flags & S_CLOSING) && do_clocal)
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
- tty_unlock();
- schedule();
- tty_lock();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&info->open_wait, &wait);
- if (!tty_hung_up_p(filp))
- info->count++;
- info->blocked_open--;
-
- if (retval)
- return retval;
- info->flags |= S_NORMAL_ACTIVE;
- return 0;
-}
-
-/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its S structure into
* the IRQ chain. It also performs the serial-specific
@@ -1196,18 +1119,18 @@ int rs_open(struct tty_struct *tty, struct file * filp)
if (serial_paranoia_check(info, tty->name, "rs_open"))
return -ENODEV;
- info->count++;
+ info->tport.count++;
tty->driver_data = info;
- info->tty = tty;
+ tty_port_tty_set(&info->tport, tty);
/*
* Start up serial port
*/
- retval = startup(info);
+ retval = startup(info, tty);
if (retval)
return retval;
- return block_til_ready(tty, filp, info);
+ return tty_port_block_til_ready(&info->tport, tty, filp);
}
/* Finally, routines used to initialize the serial driver. */
@@ -1235,11 +1158,15 @@ static const struct tty_operations rs_ops = {
.set_ldisc = rs_set_ldisc,
};
+static const struct tty_port_operations rs_port_ops = {
+};
+
/* rs_init inits the driver */
static int __init
rs68328_init(void)
{
- int flags, i;
+ unsigned long flags;
+ int i;
struct m68k_serial *info;
serial_driver = alloc_tty_driver(NR_PORTS);
@@ -1273,19 +1200,13 @@ rs68328_init(void)
for(i=0;i<NR_PORTS;i++) {
info = &m68k_soft[i];
+ tty_port_init(&info->tport);
+ info->tport.ops = &rs_port_ops;
info->magic = SERIAL_MAGIC;
info->port = (int) &uart_addr[i];
- info->tty = NULL;
info->irq = uart_irqs[i];
info->custom_divisor = 16;
- info->close_delay = 50;
- info->closing_wait = 3000;
info->x_char = 0;
- info->event = 0;
- info->count = 0;
- info->blocked_open = 0;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
info->line = i;
info->is_cons = 1; /* Means shortcuts work */
diff --git a/drivers/tty/serial/68328serial.h b/drivers/tty/serial/68328serial.h
deleted file mode 100644
index 3d2faab..0000000
--- a/drivers/tty/serial/68328serial.h
+++ /dev/null
@@ -1,186 +0,0 @@
-/* 68328serial.h: Definitions for the mc68328 serial driver.
- *
- * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu>
- * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
- * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org>
- * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com>
- *
- * VZ Support/Fixes Evan Stawnyczy <e@lineo.ca>
- */
-
-#ifndef _MC683XX_SERIAL_H
-#define _MC683XX_SERIAL_H
-
-
-struct serial_struct {
- int type;
- int line;
- int port;
- int irq;
- int flags;
- int xmit_fifo_size;
- int custom_divisor;
- int baud_base;
- unsigned short close_delay;
- char reserved_char[2];
- int hub6; /* FIXME: We don't have AT&T Hub6 boards! */
- unsigned short closing_wait; /* time to wait before closing */
- unsigned short closing_wait2; /* no longer used... */
- int reserved[4];
-};
-
-/*
- * For the close wait times, 0 means wait forever for serial port to
- * flush its output. 65535 means don't wait at all.
- */
-#define S_CLOSING_WAIT_INF 0
-#define S_CLOSING_WAIT_NONE 65535
-
-/*
- * Definitions for S_struct (and serial_struct) flags field
- */
-#define S_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
- on the callout port */
-#define S_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
-#define S_SAK 0x0004 /* Secure Attention Key (Orange book) */
-#define S_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
-
-#define S_SPD_MASK 0x0030
-#define S_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
-
-#define S_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
-#define S_SPD_CUST 0x0030 /* Use user-specified divisor */
-
-#define S_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
-#define S_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
-#define S_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
-#define S_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
-#define S_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
-
-#define S_FLAGS 0x0FFF /* Possible legal S flags */
-#define S_USR_MASK 0x0430 /* Legal flags that non-privileged
- * users can set or reset */
-
-/* Internal flags used only by kernel/chr_drv/serial.c */
-#define S_INITIALIZED 0x80000000 /* Serial port was initialized */
-#define S_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */
-#define S_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
-#define S_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
-#define S_CLOSING 0x08000000 /* Serial port is closing */
-#define S_CTS_FLOW 0x04000000 /* Do CTS flow control */
-#define S_CHECK_CD 0x02000000 /* i.e., CLOCAL */
-
-/* Software state per channel */
-
-#ifdef __KERNEL__
-
-/*
- * I believe this is the optimal setting that reduces the number of interrupts.
- * At high speeds the output might become a little "bursted" (use USTCNT_TXHE
- * if that bothers you), but in most cases it will not, since we try to
- * transmit characters every time rs_interrupt is called. Thus, quite often
- * you'll see that a receive interrupt occures before the transmit one.
- * -- Vladimir Gurevich
- */
-#define USTCNT_TX_INTR_MASK (USTCNT_TXEE)
-
-/*
- * 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special
- * "Old data interrupt" which occures whenever the data stay in the FIFO
- * longer than 30 bits time. This allows us to use FIFO without compromising
- * latency. '328 does not have this feature and without the real 328-based
- * board I would assume that RXRE is the safest setting.
- *
- * For EZ328 I use RXHE (Half empty) interrupt to reduce the number of
- * interrupts. RXFE (receive queue full) causes the system to lose data
- * at least at 115200 baud
- *
- * If your board is busy doing other stuff, you might consider to use
- * RXRE (data ready intrrupt) instead.
- *
- * The other option is to make these INTR masks run-time configurable, so
- * that people can dynamically adapt them according to the current usage.
- * -- Vladimir Gurevich
- */
-
-/* (es) */
-#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328)
-#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN)
-#elif defined(CONFIG_M68328)
-#define USTCNT_RX_INTR_MASK (USTCNT_RXRE)
-#else
-#error Please, define the Rx interrupt events for your CPU
-#endif
-/* (/es) */
-
-/*
- * This is our internal structure for each serial port's state.
- *
- * Many fields are paralleled by the structure used by the serial_struct
- * structure.
- *
- * For definitions of the flags field, see tty.h
- */
-
-struct m68k_serial {
- char soft_carrier; /* Use soft carrier on this channel */
- char break_abort; /* Is serial console in, so process brk/abrt */
- char is_cons; /* Is this our console. */
-
- /* We need to know the current clock divisor
- * to read the bps rate the chip has currently
- * loaded.
- */
- unsigned char clk_divisor; /* May be 1, 16, 32, or 64 */
- int baud;
- int magic;
- int baud_base;
- int port;
- int irq;
- int flags; /* defined in tty.h */
- int type; /* UART type */
- struct tty_struct *tty;
- int read_status_mask;
- int ignore_status_mask;
- int timeout;
- int xmit_fifo_size;
- int custom_divisor;
- int x_char; /* xon/xoff character */
- int close_delay;
- unsigned short closing_wait;
- unsigned short closing_wait2;
- unsigned long event;
- unsigned long last_active;
- int line;
- int count; /* # of fd on device */
- int blocked_open; /* # of blocked opens */
- unsigned char *xmit_buf;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
-};
-
-
-#define SERIAL_MAGIC 0x5301
-
-/*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
-#define SERIAL_XMIT_SIZE 4096
-
-/*
- * Events are used to schedule things to happen at timer-interrupt
- * time, instead of at rs interrupt time.
- */
-#define RS_EVENT_WRITE_WAKEUP 0
-
-/*
- * Define the number of ports supported and their irqs.
- */
-#define NR_PORTS 1
-#define UART_IRQ_DEFNS {UART_IRQ_NUM}
-
-#endif /* __KERNEL__ */
-#endif /* !(_MC683XX_SERIAL_H) */
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index 5c27f7e..47d061b 100644
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -284,7 +284,20 @@ static const struct serial8250_config uart_config[] = {
},
};
-#if defined(CONFIG_MIPS_ALCHEMY)
+/* Uart divisor latch read */
+static int default_serial_dl_read(struct uart_8250_port *up)
+{
+ return serial_in(up, UART_DLL) | serial_in(up, UART_DLM) << 8;
+}
+
+/* Uart divisor latch write */
+static void default_serial_dl_write(struct uart_8250_port *up, int value)
+{
+ serial_out(up, UART_DLL, value & 0xff);
+ serial_out(up, UART_DLM, value >> 8 & 0xff);
+}
+
+#ifdef CONFIG_MIPS_ALCHEMY
/* Au1x00 UART hardware has a weird register layout */
static const u8 au_io_in_map[] = {
@@ -305,22 +318,32 @@ static const u8 au_io_out_map[] = {
[UART_MCR] = 6,
};
-/* sane hardware needs no mapping */
-static inline int map_8250_in_reg(struct uart_port *p, int offset)
+static unsigned int au_serial_in(struct uart_port *p, int offset)
+{
+ offset = au_io_in_map[offset] << p->regshift;
+ return __raw_readl(p->membase + offset);
+}
+
+static void au_serial_out(struct uart_port *p, int offset, int value)
+{
+ offset = au_io_out_map[offset] << p->regshift;
+ __raw_writel(value, p->membase + offset);
+}
+
+/* Au1x00 haven't got a standard divisor latch */
+static int au_serial_dl_read(struct uart_8250_port *up)
{
- if (p->iotype != UPIO_AU)
- return offset;
- return au_io_in_map[offset];
+ return __raw_readl(up->port.membase + 0x28);
}
-static inline int map_8250_out_reg(struct uart_port *p, int offset)
+static void au_serial_dl_write(struct uart_8250_port *up, int value)
{
- if (p->iotype != UPIO_AU)
- return offset;
- return au_io_out_map[offset];
+ __raw_writel(value, up->port.membase + 0x28);
}
-#elif defined(CONFIG_SERIAL_8250_RM9K)
+#endif
+
+#ifdef CONFIG_SERIAL_8250_RM9K
static const u8
regmap_in[8] = {
@@ -344,87 +367,79 @@ static const u8
[UART_SCR] = 0x2c
};
-static inline int map_8250_in_reg(struct uart_port *p, int offset)
+static unsigned int rm9k_serial_in(struct uart_port *p, int offset)
{
- if (p->iotype != UPIO_RM9000)
- return offset;
- return regmap_in[offset];
+ offset = regmap_in[offset] << p->regshift;
+ return readl(p->membase + offset);
}
-static inline int map_8250_out_reg(struct uart_port *p, int offset)
+static void rm9k_serial_out(struct uart_port *p, int offset, int value)
{
- if (p->iotype != UPIO_RM9000)
- return offset;
- return regmap_out[offset];
+ offset = regmap_out[offset] << p->regshift;
+ writel(value, p->membase + offset);
}
-#else
+static int rm9k_serial_dl_read(struct uart_8250_port *up)
+{
+ return ((__raw_readl(up->port.membase + 0x10) << 8) |
+ (__raw_readl(up->port.membase + 0x08) & 0xff)) & 0xffff;
+}
-/* sane hardware needs no mapping */
-#define map_8250_in_reg(up, offset) (offset)
-#define map_8250_out_reg(up, offset) (offset)
+static void rm9k_serial_dl_write(struct uart_8250_port *up, int value)
+{
+ __raw_writel(value, up->port.membase + 0x08);
+ __raw_writel(value >> 8, up->port.membase + 0x10);
+}
#endif
static unsigned int hub6_serial_in(struct uart_port *p, int offset)
{
- offset = map_8250_in_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
outb(p->hub6 - 1 + offset, p->iobase);
return inb(p->iobase + 1);
}
static void hub6_serial_out(struct uart_port *p, int offset, int value)
{
- offset = map_8250_out_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
outb(p->hub6 - 1 + offset, p->iobase);
outb(value, p->iobase + 1);
}
static unsigned int mem_serial_in(struct uart_port *p, int offset)
{
- offset = map_8250_in_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
return readb(p->membase + offset);
}
static void mem_serial_out(struct uart_port *p, int offset, int value)
{
- offset = map_8250_out_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
writeb(value, p->membase + offset);
}
static void mem32_serial_out(struct uart_port *p, int offset, int value)
{
- offset = map_8250_out_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
writel(value, p->membase + offset);
}
static unsigned int mem32_serial_in(struct uart_port *p, int offset)
{
- offset = map_8250_in_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
return readl(p->membase + offset);
}
-static unsigned int au_serial_in(struct uart_port *p, int offset)
-{
- offset = map_8250_in_reg(p, offset) << p->regshift;
- return __raw_readl(p->membase + offset);
-}
-
-static void au_serial_out(struct uart_port *p, int offset, int value)
-{
- offset = map_8250_out_reg(p, offset) << p->regshift;
- __raw_writel(value, p->membase + offset);
-}
-
static unsigned int io_serial_in(struct uart_port *p, int offset)
{
- offset = map_8250_in_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
return inb(p->iobase + offset);
}
static void io_serial_out(struct uart_port *p, int offset, int value)
{
- offset = map_8250_out_reg(p, offset) << p->regshift;
+ offset = offset << p->regshift;
outb(value, p->iobase + offset);
}
@@ -434,6 +449,10 @@ static void set_io_from_upio(struct uart_port *p)
{
struct uart_8250_port *up =
container_of(p, struct uart_8250_port, port);
+
+ up->dl_read = default_serial_dl_read;
+ up->dl_write = default_serial_dl_write;
+
switch (p->iotype) {
case UPIO_HUB6:
p->serial_in = hub6_serial_in;
@@ -445,16 +464,28 @@ static void set_io_from_upio(struct uart_port *p)
p->serial_out = mem_serial_out;
break;
- case UPIO_RM9000:
case UPIO_MEM32:
p->serial_in = mem32_serial_in;
p->serial_out = mem32_serial_out;
break;
+#ifdef CONFIG_SERIAL_8250_RM9K
+ case UPIO_RM9000:
+ p->serial_in = rm9k_serial_in;
+ p->serial_out = rm9k_serial_out;
+ up->dl_read = rm9k_serial_dl_read;
+ up->dl_write = rm9k_serial_dl_write;
+ break;
+#endif
+
+#ifdef CONFIG_MIPS_ALCHEMY
case UPIO_AU:
p->serial_in = au_serial_in;
p->serial_out = au_serial_out;
+ up->dl_read = au_serial_dl_read;
+ up->dl_write = au_serial_dl_write;
break;
+#endif
default:
p->serial_in = io_serial_in;
@@ -481,59 +512,6 @@ serial_port_out_sync(struct uart_port *p, int offset, int value)
}
}
-/* Uart divisor latch read */
-static inline int _serial_dl_read(struct uart_8250_port *up)
-{
- return serial_in(up, UART_DLL) | serial_in(up, UART_DLM) << 8;
-}
-
-/* Uart divisor latch write */
-static inline void _serial_dl_write(struct uart_8250_port *up, int value)
-{
- serial_out(up, UART_DLL, value & 0xff);
- serial_out(up, UART_DLM, value >> 8 & 0xff);
-}
-
-#if defined(CONFIG_MIPS_ALCHEMY)
-/* Au1x00 haven't got a standard divisor latch */
-static int serial_dl_read(struct uart_8250_port *up)
-{
- if (up->port.iotype == UPIO_AU)
- return __raw_readl(up->port.membase + 0x28);
- else
- return _serial_dl_read(up);
-}
-
-static void serial_dl_write(struct uart_8250_port *up, int value)
-{
- if (up->port.iotype == UPIO_AU)
- __raw_writel(value, up->port.membase + 0x28);
- else
- _serial_dl_write(up, value);
-}
-#elif defined(CONFIG_SERIAL_8250_RM9K)
-static int serial_dl_read(struct uart_8250_port *up)
-{
- return (up->port.iotype == UPIO_RM9000) ?
- (((__raw_readl(up->port.membase + 0x10) << 8) |
- (__raw_readl(up->port.membase + 0x08) & 0xff)) & 0xffff) :
- _serial_dl_read(up);
-}
-
-static void serial_dl_write(struct uart_8250_port *up, int value)
-{
- if (up->port.iotype == UPIO_RM9000) {
- __raw_writel(value, up->port.membase + 0x08);
- __raw_writel(value >> 8, up->port.membase + 0x10);
- } else {
- _serial_dl_write(up, value);
- }
-}
-#else
-#define serial_dl_read(up) _serial_dl_read(up)
-#define serial_dl_write(up, value) _serial_dl_write(up, value)
-#endif
-
/*
* For the 16C950
*/
@@ -568,6 +546,16 @@ static void serial8250_clear_fifos(struct uart_8250_port *p)
}
}
+void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p)
+{
+ unsigned char fcr;
+
+ serial8250_clear_fifos(p);
+ fcr = uart_config[p->port.type].fcr;
+ serial_out(p, UART_FCR, fcr);
+}
+EXPORT_SYMBOL_GPL(serial8250_clear_and_reinit_fifos);
+
/*
* IER sleep support. UARTs which have EFRs need the "extended
* capability" bit enabled. Note that on XR16C850s, we need to
@@ -1332,27 +1320,6 @@ static void serial8250_enable_ms(struct uart_port *port)
}
/*
- * Clear the Tegra rx fifo after a break
- *
- * FIXME: This needs to become a port specific callback once we have a
- * framework for this
- */
-static void clear_rx_fifo(struct uart_8250_port *up)
-{
- unsigned int status, tmout = 10000;
- do {
- status = serial_in(up, UART_LSR);
- if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
- status = serial_in(up, UART_RX);
- else
- break;
- if (--tmout == 0)
- break;
- udelay(1);
- } while (1);
-}
-
-/*
* serial8250_rx_chars: processes according to the passed in LSR
* value, and returns the remaining LSR bits not handled
* by this Rx routine.
@@ -1386,20 +1353,10 @@ serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr)
up->lsr_saved_flags = 0;
if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) {
- /*
- * For statistics only
- */
if (lsr & UART_LSR_BI) {
lsr &= ~(UART_LSR_FE | UART_LSR_PE);
port->icount.brk++;
/*
- * If tegra port then clear the rx fifo to
- * accept another break/character.
- */
- if (port->type == PORT_TEGRA)
- clear_rx_fifo(up);
-
- /*
* We do the SysRQ and SAK checking
* here because otherwise the break
* may get masked by ignore_status_mask
@@ -2280,10 +2237,11 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
quot++;
if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) {
- if (baud < 2400)
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
- else
- fcr = uart_config[port->type].fcr;
+ fcr = uart_config[port->type].fcr;
+ if (baud < 2400) {
+ fcr &= ~UART_FCR_TRIGGER_MASK;
+ fcr |= UART_FCR_TRIGGER_1;
+ }
}
/*
@@ -3037,6 +2995,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
port.serial_in = p->serial_in;
port.serial_out = p->serial_out;
port.handle_irq = p->handle_irq;
+ port.handle_break = p->handle_break;
port.set_termios = p->set_termios;
port.pm = p->pm;
port.dev = &dev->dev;
@@ -3153,7 +3112,7 @@ static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *
}
/**
- * serial8250_register_port - register a serial port
+ * serial8250_register_8250_port - register a serial port
* @port: serial port template
*
* Configure the serial port specified by the request. If the
@@ -3165,50 +3124,56 @@ static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *
*
* On success the port is ready to use and the line number is returned.
*/
-int serial8250_register_port(struct uart_port *port)
+int serial8250_register_8250_port(struct uart_8250_port *up)
{
struct uart_8250_port *uart;
int ret = -ENOSPC;
- if (port->uartclk == 0)
+ if (up->port.uartclk == 0)
return -EINVAL;
mutex_lock(&serial_mutex);
- uart = serial8250_find_match_or_unused(port);
+ uart = serial8250_find_match_or_unused(&up->port);
if (uart) {
uart_remove_one_port(&serial8250_reg, &uart->port);
- uart->port.iobase = port->iobase;
- uart->port.membase = port->membase;
- uart->port.irq = port->irq;
- uart->port.irqflags = port->irqflags;
- uart->port.uartclk = port->uartclk;
- uart->port.fifosize = port->fifosize;
- uart->port.regshift = port->regshift;
- uart->port.iotype = port->iotype;
- uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
- uart->port.mapbase = port->mapbase;
- uart->port.private_data = port->private_data;
- if (port->dev)
- uart->port.dev = port->dev;
-
- if (port->flags & UPF_FIXED_TYPE)
- serial8250_init_fixed_type_port(uart, port->type);
+ uart->port.iobase = up->port.iobase;
+ uart->port.membase = up->port.membase;
+ uart->port.irq = up->port.irq;
+ uart->port.irqflags = up->port.irqflags;
+ uart->port.uartclk = up->port.uartclk;
+ uart->port.fifosize = up->port.fifosize;
+ uart->port.regshift = up->port.regshift;
+ uart->port.iotype = up->port.iotype;
+ uart->port.flags = up->port.flags | UPF_BOOT_AUTOCONF;
+ uart->port.mapbase = up->port.mapbase;
+ uart->port.private_data = up->port.private_data;
+ if (up->port.dev)
+ uart->port.dev = up->port.dev;
+
+ if (up->port.flags & UPF_FIXED_TYPE)
+ serial8250_init_fixed_type_port(uart, up->port.type);
set_io_from_upio(&uart->port);
/* Possibly override default I/O functions. */
- if (port->serial_in)
- uart->port.serial_in = port->serial_in;
- if (port->serial_out)
- uart->port.serial_out = port->serial_out;
- if (port->handle_irq)
- uart->port.handle_irq = port->handle_irq;
+ if (up->port.serial_in)
+ uart->port.serial_in = up->port.serial_in;
+ if (up->port.serial_out)
+ uart->port.serial_out = up->port.serial_out;
+ if (up->port.handle_irq)
+ uart->port.handle_irq = up->port.handle_irq;
/* Possibly override set_termios call */
- if (port->set_termios)
- uart->port.set_termios = port->set_termios;
- if (port->pm)
- uart->port.pm = port->pm;
+ if (up->port.set_termios)
+ uart->port.set_termios = up->port.set_termios;
+ if (up->port.pm)
+ uart->port.pm = up->port.pm;
+ if (up->port.handle_break)
+ uart->port.handle_break = up->port.handle_break;
+ if (up->dl_read)
+ uart->dl_read = up->dl_read;
+ if (up->dl_write)
+ uart->dl_write = up->dl_write;
if (serial8250_isa_config != NULL)
serial8250_isa_config(0, &uart->port,
@@ -3222,6 +3187,29 @@ int serial8250_register_port(struct uart_port *port)
return ret;
}
+EXPORT_SYMBOL(serial8250_register_8250_port);
+
+/**
+ * serial8250_register_port - register a serial port
+ * @port: serial port template
+ *
+ * Configure the serial port specified by the request. If the
+ * port exists and is in use, it is hung up and unregistered
+ * first.
+ *
+ * The port is then probed and if necessary the IRQ is autodetected
+ * If this fails an error is returned.
+ *
+ * On success the port is ready to use and the line number is returned.
+ */
+int serial8250_register_port(struct uart_port *port)
+{
+ struct uart_8250_port up;
+
+ memset(&up, 0, sizeof(up));
+ memcpy(&up.port, port, sizeof(*port));
+ return serial8250_register_8250_port(&up);
+}
EXPORT_SYMBOL(serial8250_register_port);
/**
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 2868a1d..f9719d1 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -37,6 +37,10 @@ struct uart_8250_port {
unsigned char lsr_saved_flags;
#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
unsigned char msr_saved_flags;
+
+ /* 8250 specific callbacks */
+ int (*dl_read)(struct uart_8250_port *);
+ void (*dl_write)(struct uart_8250_port *, int);
};
struct old_serial_port {
@@ -96,6 +100,18 @@ static inline void serial_out(struct uart_8250_port *up, int offset, int value)
up->port.serial_out(&up->port, offset, value);
}
+void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p);
+
+static inline int serial_dl_read(struct uart_8250_port *up)
+{
+ return up->dl_read(up);
+}
+
+static inline void serial_dl_write(struct uart_8250_port *up, int value)
+{
+ up->dl_write(up, value);
+}
+
#if defined(__alpha__) && !defined(CONFIG_PCI)
/*
* Digital did something really horribly wrong with the OUT1 and OUT2
diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c
new file mode 100644
index 0000000..3a0363e
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_em.c
@@ -0,0 +1,186 @@
+/*
+ * Renesas Emma Mobile 8250 driver
+ *
+ * Copyright (C) 2012 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+
+#include "8250.h"
+
+#define UART_DLL_EM 9
+#define UART_DLM_EM 10
+
+struct serial8250_em_priv {
+ struct clk *sclk;
+ int line;
+};
+
+static void serial8250_em_serial_out(struct uart_port *p, int offset, int value)
+{
+ switch (offset) {
+ case UART_TX: /* TX @ 0x00 */
+ writeb(value, p->membase);
+ break;
+ case UART_FCR: /* FCR @ 0x0c (+1) */
+ case UART_LCR: /* LCR @ 0x10 (+1) */
+ case UART_MCR: /* MCR @ 0x14 (+1) */
+ case UART_SCR: /* SCR @ 0x20 (+1) */
+ writel(value, p->membase + ((offset + 1) << 2));
+ break;
+ case UART_IER: /* IER @ 0x04 */
+ value &= 0x0f; /* only 4 valid bits - not Xscale */
+ /* fall-through */
+ case UART_DLL_EM: /* DLL @ 0x24 (+9) */
+ case UART_DLM_EM: /* DLM @ 0x28 (+9) */
+ writel(value, p->membase + (offset << 2));
+ }
+}
+
+static unsigned int serial8250_em_serial_in(struct uart_port *p, int offset)
+{
+ switch (offset) {
+ case UART_RX: /* RX @ 0x00 */
+ return readb(p->membase);
+ case UART_MCR: /* MCR @ 0x14 (+1) */
+ case UART_LSR: /* LSR @ 0x18 (+1) */
+ case UART_MSR: /* MSR @ 0x1c (+1) */
+ case UART_SCR: /* SCR @ 0x20 (+1) */
+ return readl(p->membase + ((offset + 1) << 2));
+ case UART_IER: /* IER @ 0x04 */
+ case UART_IIR: /* IIR @ 0x08 */
+ case UART_DLL_EM: /* DLL @ 0x24 (+9) */
+ case UART_DLM_EM: /* DLM @ 0x28 (+9) */
+ return readl(p->membase + (offset << 2));
+ }
+ return 0;
+}
+
+static int serial8250_em_serial_dl_read(struct uart_8250_port *up)
+{
+ return serial_in(up, UART_DLL_EM) | serial_in(up, UART_DLM_EM) << 8;
+}
+
+static void serial8250_em_serial_dl_write(struct uart_8250_port *up, int value)
+{
+ serial_out(up, UART_DLL_EM, value & 0xff);
+ serial_out(up, UART_DLM_EM, value >> 8 & 0xff);
+}
+
+static int __devinit serial8250_em_probe(struct platform_device *pdev)
+{
+ struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ struct serial8250_em_priv *priv;
+ struct uart_8250_port up;
+ int ret = -EINVAL;
+
+ if (!regs || !irq) {
+ dev_err(&pdev->dev, "missing registers or irq\n");
+ goto err0;
+ }
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "unable to allocate private data\n");
+ ret = -ENOMEM;
+ goto err0;
+ }
+
+ priv->sclk = clk_get(&pdev->dev, "sclk");
+ if (IS_ERR(priv->sclk)) {
+ dev_err(&pdev->dev, "unable to get clock\n");
+ ret = PTR_ERR(priv->sclk);
+ goto err1;
+ }
+
+ memset(&up, 0, sizeof(up));
+ up.port.mapbase = regs->start;
+ up.port.irq = irq->start;
+ up.port.type = PORT_UNKNOWN;
+ up.port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_IOREMAP;
+ up.port.dev = &pdev->dev;
+ up.port.private_data = priv;
+
+ clk_enable(priv->sclk);
+ up.port.uartclk = clk_get_rate(priv->sclk);
+
+ up.port.iotype = UPIO_MEM32;
+ up.port.serial_in = serial8250_em_serial_in;
+ up.port.serial_out = serial8250_em_serial_out;
+ up.dl_read = serial8250_em_serial_dl_read;
+ up.dl_write = serial8250_em_serial_dl_write;
+
+ ret = serial8250_register_8250_port(&up);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "unable to register 8250 port\n");
+ goto err2;
+ }
+
+ priv->line = ret;
+ platform_set_drvdata(pdev, priv);
+ return 0;
+
+ err2:
+ clk_disable(priv->sclk);
+ clk_put(priv->sclk);
+ err1:
+ kfree(priv);
+ err0:
+ return ret;
+}
+
+static int __devexit serial8250_em_remove(struct platform_device *pdev)
+{
+ struct serial8250_em_priv *priv = platform_get_drvdata(pdev);
+
+ serial8250_unregister_port(priv->line);
+ clk_disable(priv->sclk);
+ clk_put(priv->sclk);
+ kfree(priv);
+ return 0;
+}
+
+static const struct of_device_id serial8250_em_dt_ids[] __devinitconst = {
+ { .compatible = "renesas,em-uart", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, serial8250_em_dt_ids);
+
+static struct platform_driver serial8250_em_platform_driver = {
+ .driver = {
+ .name = "serial8250-em",
+ .of_match_table = serial8250_em_dt_ids,
+ .owner = THIS_MODULE,
+ },
+ .probe = serial8250_em_probe,
+ .remove = __devexit_p(serial8250_em_remove),
+};
+
+module_platform_driver(serial8250_em_platform_driver);
+
+MODULE_AUTHOR("Magnus Damm");
+MODULE_DESCRIPTION("Renesas Emma Mobile 8250 Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 858dca8..28e7c7c 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -17,6 +17,7 @@
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/tty.h>
+#include <linux/serial_reg.h>
#include <linux/serial_core.h>
#include <linux/8250_pci.h>
#include <linux/bitops.h>
@@ -1092,11 +1093,49 @@ static int skip_tx_en_setup(struct serial_private *priv,
return pci_default_setup(priv, board, port, idx);
}
+static void kt_handle_break(struct uart_port *p)
+{
+ struct uart_8250_port *up =
+ container_of(p, struct uart_8250_port, port);
+ /*
+ * On receipt of a BI, serial device in Intel ME (Intel
+ * management engine) needs to have its fifos cleared for sane
+ * SOL (Serial Over Lan) output.
+ */
+ serial8250_clear_and_reinit_fifos(up);
+}
+
+static unsigned int kt_serial_in(struct uart_port *p, int offset)
+{
+ struct uart_8250_port *up =
+ container_of(p, struct uart_8250_port, port);
+ unsigned int val;
+
+ /*
+ * When the Intel ME (management engine) gets reset its serial
+ * port registers could return 0 momentarily. Functions like
+ * serial8250_console_write, read and save the IER, perform
+ * some operation and then restore it. In order to avoid
+ * setting IER register inadvertently to 0, if the value read
+ * is 0, double check with ier value in uart_8250_port and use
+ * that instead. up->ier should be the same value as what is
+ * currently configured.
+ */
+ val = inb(p->iobase + offset);
+ if (offset == UART_IER) {
+ if (val == 0)
+ val = up->ier;
+ }
+ return val;
+}
+
static int kt_serial_setup(struct serial_private *priv,
const struct pciserial_board *board,
struct uart_port *port, int idx)
{
port->flags |= UPF_BUG_THRE;
+ port->serial_in = kt_serial_in;
+ port->handle_break = kt_handle_break;
return skip_tx_en_setup(priv, board, port, idx);
}
@@ -1609,54 +1648,72 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8811,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8812,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8813,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8814,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x8027,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x8028,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x8029,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x800C,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x800D,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
.init = pci_eg20t_init,
.setup = pci_default_setup,
},
@@ -2775,6 +2832,12 @@ void pciserial_suspend_ports(struct serial_private *priv)
for (i = 0; i < priv->nr; i++)
if (priv->line[i] >= 0)
serial8250_suspend_port(priv->line[i]);
+
+ /*
+ * Ensure that every init quirk is properly torn down
+ */
+ if (priv->quirk->exit)
+ priv->quirk->exit(priv->dev);
}
EXPORT_SYMBOL_GPL(pciserial_suspend_ports);
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 591f801..8bc7ecb 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -278,3 +278,11 @@ config SERIAL_8250_DW
help
Selecting this option will enable handling of the extra features
present in the Synopsys DesignWare APB UART.
+
+config SERIAL_8250_EM
+ tristate "Support for Emma Mobile intergrated serial port"
+ depends on SERIAL_8250 && ARM && HAVE_CLK
+ help
+ Selecting this option will add support for the integrated serial
+ port hardware found on the Emma Mobile line of processors.
+ If unsure, say N.
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index 867bba7..3f35eac 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -18,3 +18,4 @@ obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o
obj-$(CONFIG_SERIAL_8250_MCA) += 8250_mca.o
obj-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o
obj-$(CONFIG_SERIAL_8250_DW) += 8250_dw.o
+obj-$(CONFIG_SERIAL_8250_EM) += 8250_em.o
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 062ef8c..4ad721f 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -68,30 +68,6 @@
#define UART_DR_ERROR (UART011_DR_OE|UART011_DR_BE|UART011_DR_PE|UART011_DR_FE)
#define UART_DUMMY_DR_RX (1 << 16)
-
-#define UART_WA_SAVE_NR 14
-
-static void pl011_lockup_wa(unsigned long data);
-static const u32 uart_wa_reg[UART_WA_SAVE_NR] = {
- ST_UART011_DMAWM,
- ST_UART011_TIMEOUT,
- ST_UART011_LCRH_RX,
- UART011_IBRD,
- UART011_FBRD,
- ST_UART011_LCRH_TX,
- UART011_IFLS,
- ST_UART011_XFCR,
- ST_UART011_XON1,
- ST_UART011_XON2,
- ST_UART011_XOFF1,
- ST_UART011_XOFF2,
- UART011_CR,
- UART011_IMSC
-};
-
-static u32 uart_wa_regdata[UART_WA_SAVE_NR];
-static DECLARE_TASKLET(pl011_lockup_tlet, pl011_lockup_wa, 0);
-
/* There is by now at least one vendor with differing details, so handle it */
struct vendor_data {
unsigned int ifls;
@@ -101,6 +77,7 @@ struct vendor_data {
bool oversampling;
bool interrupt_may_hang; /* vendor-specific */
bool dma_threshold;
+ bool cts_event_workaround;
};
static struct vendor_data vendor_arm = {
@@ -110,6 +87,7 @@ static struct vendor_data vendor_arm = {
.lcrh_rx = UART011_LCRH,
.oversampling = false,
.dma_threshold = false,
+ .cts_event_workaround = false,
};
static struct vendor_data vendor_st = {
@@ -120,6 +98,7 @@ static struct vendor_data vendor_st = {
.oversampling = true,
.interrupt_may_hang = true,
.dma_threshold = true,
+ .cts_event_workaround = true,
};
static struct uart_amba_port *amba_ports[UART_NR];
@@ -1055,69 +1034,6 @@ static inline bool pl011_dma_rx_running(struct uart_amba_port *uap)
#define pl011_dma_flush_buffer NULL
#endif
-
-/*
- * pl011_lockup_wa
- * This workaround aims to break the deadlock situation
- * when after long transfer over uart in hardware flow
- * control, uart interrupt registers cannot be cleared.
- * Hence uart transfer gets blocked.
- *
- * It is seen that during such deadlock condition ICR
- * don't get cleared even on multiple write. This leads
- * pass_counter to decrease and finally reach zero. This
- * can be taken as trigger point to run this UART_BT_WA.
- *
- */
-static void pl011_lockup_wa(unsigned long data)
-{
- struct uart_amba_port *uap = amba_ports[0];
- void __iomem *base = uap->port.membase;
- struct circ_buf *xmit = &uap->port.state->xmit;
- struct tty_struct *tty = uap->port.state->port.tty;
- int buf_empty_retries = 200;
- int loop;
-
- /* Stop HCI layer from submitting data for tx */
- tty->hw_stopped = 1;
- while (!uart_circ_empty(xmit)) {
- if (buf_empty_retries-- == 0)
- break;
- udelay(100);
- }
-
- /* Backup registers */
- for (loop = 0; loop < UART_WA_SAVE_NR; loop++)
- uart_wa_regdata[loop] = readl(base + uart_wa_reg[loop]);
-
- /* Disable UART so that FIFO data is flushed out */
- writew(0x00, uap->port.membase + UART011_CR);
-
- /* Soft reset UART module */
- if (uap->port.dev->platform_data) {
- struct amba_pl011_data *plat;
-
- plat = uap->port.dev->platform_data;
- if (plat->reset)
- plat->reset();
- }
-
- /* Restore registers */
- for (loop = 0; loop < UART_WA_SAVE_NR; loop++)
- writew(uart_wa_regdata[loop] ,
- uap->port.membase + uart_wa_reg[loop]);
-
- /* Initialise the old status of the modem signals */
- uap->old_status = readw(uap->port.membase + UART01x_FR) &
- UART01x_FR_MODEM_ANY;
-
- if (readl(base + UART011_MIS) & 0x2)
- printk(KERN_EMERG "UART_BT_WA: ***FAILED***\n");
-
- /* Start Tx/Rx */
- tty->hw_stopped = 0;
-}
-
static void pl011_stop_tx(struct uart_port *port)
{
struct uart_amba_port *uap = (struct uart_amba_port *)port;
@@ -1246,12 +1162,26 @@ static irqreturn_t pl011_int(int irq, void *dev_id)
unsigned long flags;
unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
int handled = 0;
+ unsigned int dummy_read;
spin_lock_irqsave(&uap->port.lock, flags);
status = readw(uap->port.membase + UART011_MIS);
if (status) {
do {
+ if (uap->vendor->cts_event_workaround) {
+ /* workaround to make sure that all bits are unlocked.. */
+ writew(0x00, uap->port.membase + UART011_ICR);
+
+ /*
+ * WA: introduce 26ns(1 uart clk) delay before W1C;
+ * single apb access will incur 2 pclk(133.12Mhz) delay,
+ * so add 2 dummy reads
+ */
+ dummy_read = readw(uap->port.membase + UART011_ICR);
+ dummy_read = readw(uap->port.membase + UART011_ICR);
+ }
+
writew(status & ~(UART011_TXIS|UART011_RTIS|
UART011_RXIS),
uap->port.membase + UART011_ICR);
@@ -1268,11 +1198,8 @@ static irqreturn_t pl011_int(int irq, void *dev_id)
if (status & UART011_TXIS)
pl011_tx_chars(uap);
- if (pass_counter-- == 0) {
- if (uap->interrupt_may_hang)
- tasklet_schedule(&pl011_lockup_tlet);
+ if (pass_counter-- == 0)
break;
- }
status = readw(uap->port.membase + UART011_MIS);
} while (status != 0);
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index 5832fde..bd97db2 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -1,7 +1,7 @@
/*
* Blackfin On-Chip Serial Driver
*
- * Copyright 2006-2010 Analog Devices Inc.
+ * Copyright 2006-2011 Analog Devices Inc.
*
* Enter bugs at http://blackfin.uclinux.org/
*
@@ -35,10 +35,6 @@
#include <asm/portmux.h>
#include <asm/cacheflush.h>
#include <asm/dma.h>
-
-#define port_membase(uart) (((struct bfin_serial_port *)(uart))->port.membase)
-#define get_lsr_cache(uart) (((struct bfin_serial_port *)(uart))->lsr)
-#define put_lsr_cache(uart, v) (((struct bfin_serial_port *)(uart))->lsr = (v))
#include <asm/bfin_serial.h>
#ifdef CONFIG_SERIAL_BFIN_MODULE
@@ -166,7 +162,7 @@ static void bfin_serial_stop_tx(struct uart_port *port)
uart->tx_count = 0;
uart->tx_done = 1;
#else
-#ifdef CONFIG_BF54x
+#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x)
/* Clear TFI bit */
UART_PUT_LSR(uart, TFI);
#endif
@@ -337,7 +333,7 @@ static void bfin_serial_tx_chars(struct bfin_serial_port *uart)
struct circ_buf *xmit = &uart->port.state->xmit;
if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) {
-#ifdef CONFIG_BF54x
+#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x)
/* Clear TFI bit */
UART_PUT_LSR(uart, TFI);
#endif
@@ -536,7 +532,7 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id)
*/
UART_CLEAR_IER(uart, ETBEI);
uart->port.icount.tx += uart->tx_count;
- if (!uart_circ_empty(xmit)) {
+ if (!(xmit->tail == 0 && xmit->head == 0)) {
xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
@@ -553,7 +549,7 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id)
static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id)
{
struct bfin_serial_port *uart = dev_id;
- unsigned short irqstat;
+ unsigned int irqstat;
int x_pos, pos;
spin_lock(&uart->rx_lock);
@@ -586,7 +582,7 @@ static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id)
static unsigned int bfin_serial_tx_empty(struct uart_port *port)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- unsigned short lsr;
+ unsigned int lsr;
lsr = UART_GET_LSR(uart);
if (lsr & TEMT)
@@ -598,7 +594,7 @@ static unsigned int bfin_serial_tx_empty(struct uart_port *port)
static void bfin_serial_break_ctl(struct uart_port *port, int break_state)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- u16 lcr = UART_GET_LCR(uart);
+ u32 lcr = UART_GET_LCR(uart);
if (break_state)
lcr |= SB;
else
@@ -745,7 +741,7 @@ static int bfin_serial_startup(struct uart_port *port)
}
/* CTS RTS PINs are negative assertive. */
- UART_PUT_MCR(uart, ACTS);
+ UART_PUT_MCR(uart, UART_GET_MCR(uart) | ACTS);
UART_SET_IER(uart, EDSSI);
}
#endif
@@ -803,7 +799,7 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
unsigned long flags;
unsigned int baud, quot;
- unsigned short val, ier, lcr = 0;
+ unsigned int ier, lcr = 0;
switch (termios->c_cflag & CSIZE) {
case CS8:
@@ -875,26 +871,23 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
/* Disable UART */
ier = UART_GET_IER(uart);
+ UART_PUT_GCTL(uart, UART_GET_GCTL(uart) & ~UCEN);
UART_DISABLE_INTS(uart);
- /* Set DLAB in LCR to Access DLL and DLH */
+ /* Set DLAB in LCR to Access CLK */
UART_SET_DLAB(uart);
- UART_PUT_DLL(uart, quot & 0xFF);
- UART_PUT_DLH(uart, (quot >> 8) & 0xFF);
+ UART_PUT_CLK(uart, quot);
SSYNC();
/* Clear DLAB in LCR to Access THR RBR IER */
UART_CLEAR_DLAB(uart);
- UART_PUT_LCR(uart, lcr);
+ UART_PUT_LCR(uart, (UART_GET_LCR(uart) & ~LCR_MASK) | lcr);
/* Enable UART */
UART_ENABLE_INTS(uart, ier);
-
- val = UART_GET_GCTL(uart);
- val |= UCEN;
- UART_PUT_GCTL(uart, val);
+ UART_PUT_GCTL(uart, UART_GET_GCTL(uart) | UCEN);
/* Port speed changed, update the per-port timeout. */
uart_update_timeout(port, termios->c_cflag, baud);
@@ -954,17 +947,17 @@ bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser)
static void bfin_serial_set_ldisc(struct uart_port *port, int ld)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- unsigned short val;
+ unsigned int val;
switch (ld) {
case N_IRDA:
val = UART_GET_GCTL(uart);
- val |= (IREN | RPOLC);
+ val |= (UMOD_IRDA | RPOLC);
UART_PUT_GCTL(uart, val);
break;
default:
val = UART_GET_GCTL(uart);
- val &= ~(IREN | RPOLC);
+ val &= ~(UMOD_MASK | RPOLC);
UART_PUT_GCTL(uart, val);
}
}
@@ -972,13 +965,13 @@ static void bfin_serial_set_ldisc(struct uart_port *port, int ld)
static void bfin_serial_reset_irda(struct uart_port *port)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- unsigned short val;
+ unsigned int val;
val = UART_GET_GCTL(uart);
- val &= ~(IREN | RPOLC);
+ val &= ~(UMOD_MASK | RPOLC);
UART_PUT_GCTL(uart, val);
SSYNC();
- val |= (IREN | RPOLC);
+ val |= (UMOD_IRDA | RPOLC);
UART_PUT_GCTL(uart, val);
SSYNC();
}
@@ -1070,12 +1063,12 @@ static void __init
bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud,
int *parity, int *bits)
{
- unsigned short status;
+ unsigned int status;
status = UART_GET_IER(uart) & (ERBFI | ETBEI);
if (status == (ERBFI | ETBEI)) {
/* ok, the port was enabled */
- u16 lcr, dlh, dll;
+ u32 lcr, clk;
lcr = UART_GET_LCR(uart);
@@ -1086,30 +1079,17 @@ bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud,
else
*parity = 'o';
}
- switch (lcr & 0x03) {
- case 0:
- *bits = 5;
- break;
- case 1:
- *bits = 6;
- break;
- case 2:
- *bits = 7;
- break;
- case 3:
- *bits = 8;
- break;
- }
- /* Set DLAB in LCR to Access DLL and DLH */
+ *bits = ((lcr & WLS_MASK) >> WLS_OFFSET) + 5;
+
+ /* Set DLAB in LCR to Access CLK */
UART_SET_DLAB(uart);
- dll = UART_GET_DLL(uart);
- dlh = UART_GET_DLH(uart);
+ clk = UART_GET_CLK(uart);
/* Clear DLAB in LCR to Access THR RBR IER */
UART_CLEAR_DLAB(uart);
- *baud = get_sclk() / (16*(dll | dlh << 8));
+ *baud = get_sclk() / (16*clk);
}
pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __func__, *baud, *parity, *bits);
}
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index 5b07c0c..7264d4d 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -952,19 +952,6 @@ static const struct control_pins e100_modem_pins[NR_PORTS] =
/* Input */
#define E100_DSR_GET(info) ((*e100_modem_pins[(info)->line].dsr_port) & e100_modem_pins[(info)->line].dsr_mask)
-
-/*
- * tmp_buf is used as a temporary buffer by serial_write. We need to
- * lock it in case the memcpy_fromfs blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DEFINE_MUTEX(tmp_buf_mutex);
-
/* Calculate the chartime depending on baudrate, numbor of bits etc. */
static void update_char_time(struct e100_serial * info)
{
@@ -3150,7 +3137,7 @@ static int rs_raw_write(struct tty_struct *tty,
/* first some sanity checks */
- if (!tty || !info->xmit.buf || !tmp_buf)
+ if (!tty || !info->xmit.buf)
return 0;
#ifdef SERIAL_DEBUG_DATA
@@ -3989,7 +3976,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
*/
if (tty_hung_up_p(filp) ||
(info->flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(info->close_wait,
+ wait_event_interruptible_tty(tty, info->close_wait,
!(info->flags & ASYNC_CLOSING));
#ifdef SERIAL_DO_RESTART
if (info->flags & ASYNC_HUP_NOTIFY)
@@ -4065,9 +4052,9 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
printk("block_til_ready blocking: ttyS%d, count = %d\n",
info->line, info->count);
#endif
- tty_unlock();
+ tty_unlock(tty);
schedule();
- tty_lock();
+ tty_lock(tty);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&info->open_wait, &wait);
@@ -4106,7 +4093,6 @@ rs_open(struct tty_struct *tty, struct file * filp)
{
struct e100_serial *info;
int retval;
- unsigned long page;
int allocated_resources = 0;
info = rs_table + tty->index;
@@ -4124,23 +4110,12 @@ rs_open(struct tty_struct *tty, struct file * filp)
tty->low_latency = !!(info->flags & ASYNC_LOW_LATENCY);
- if (!tmp_buf) {
- page = get_zeroed_page(GFP_KERNEL);
- if (!page) {
- return -ENOMEM;
- }
- if (tmp_buf)
- free_page(page);
- else
- tmp_buf = (unsigned char *) page;
- }
-
/*
* If the port is in the middle of closing, bail out now
*/
if (tty_hung_up_p(filp) ||
(info->flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(info->close_wait,
+ wait_event_interruptible_tty(tty, info->close_wait,
!(info->flags & ASYNC_CLOSING));
#ifdef SERIAL_DO_RESTART
return ((info->flags & ASYNC_HUP_NOTIFY) ?
@@ -4487,6 +4462,7 @@ static int __init rs_init(void)
info->enabled = 0;
}
}
+ tty_port_init(&info->port);
info->uses_dma_in = 0;
info->uses_dma_out = 0;
info->line = i;
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 7081600..ec56d83 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -370,6 +370,8 @@ static void mxs_auart_settermios(struct uart_port *u,
writel(ctrl, u->membase + AUART_LINECTRL);
writel(ctrl2, u->membase + AUART_CTRL2);
+
+ uart_update_timeout(u, termios->c_cflag, baud);
}
static irqreturn_t mxs_auart_irq_handle(int irq, void *context)
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index e8c9cee..5410c06 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -12,10 +12,13 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/delay.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
+#include <linux/serial_reg.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/of_serial.h>
#include <linux/of_platform.h>
#include <linux/nwpserial.h>
@@ -24,6 +27,26 @@ struct of_serial_info {
int line;
};
+#ifdef CONFIG_ARCH_TEGRA
+void tegra_serial_handle_break(struct uart_port *p)
+{
+ unsigned int status, tmout = 10000;
+
+ do {
+ status = p->serial_in(p, UART_LSR);
+ if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
+ status = p->serial_in(p, UART_RX);
+ else
+ break;
+ if (--tmout == 0)
+ break;
+ udelay(1);
+ } while (1);
+}
+/* FIXME remove this export when tegra finishes conversion to open firmware */
+EXPORT_SYMBOL_GPL(tegra_serial_handle_break);
+#endif
+
/*
* Fill a struct uart_port for a given device node
*/
@@ -84,6 +107,9 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
| UPF_FIXED_PORT | UPF_FIXED_TYPE;
port->dev = &ofdev->dev;
+ if (type == PORT_TEGRA)
+ port->handle_break = tegra_serial_handle_break;
+
return 0;
}
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index d00b38e..d3cda0c 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -44,6 +44,13 @@
#include <plat/dmtimer.h>
#include <plat/omap-serial.h>
+#define UART_BUILD_REVISION(x, y) (((x) << 8) | (y))
+
+#define OMAP_UART_REV_42 0x0402
+#define OMAP_UART_REV_46 0x0406
+#define OMAP_UART_REV_52 0x0502
+#define OMAP_UART_REV_63 0x0603
+
#define DEFAULT_CLK_SPEED 48000000 /* 48Mhz*/
/* SCR register bitmasks */
@@ -53,6 +60,17 @@
#define OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT 6
#define OMAP_UART_FCR_RX_FIFO_TRIG_MASK (0x3 << 6)
+/* MVR register bitmasks */
+#define OMAP_UART_MVR_SCHEME_SHIFT 30
+
+#define OMAP_UART_LEGACY_MVR_MAJ_MASK 0xf0
+#define OMAP_UART_LEGACY_MVR_MAJ_SHIFT 4
+#define OMAP_UART_LEGACY_MVR_MIN_MASK 0x0f
+
+#define OMAP_UART_MVR_MAJ_MASK 0x700
+#define OMAP_UART_MVR_MAJ_SHIFT 8
+#define OMAP_UART_MVR_MIN_MASK 0x3f
+
static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS];
/* Forward declaration of functions */
@@ -1346,6 +1364,59 @@ static void uart_tx_dma_callback(int lch, u16 ch_status, void *data)
return;
}
+static void omap_serial_fill_features_erratas(struct uart_omap_port *up)
+{
+ u32 mvr, scheme;
+ u16 revision, major, minor;
+
+ mvr = serial_in(up, UART_OMAP_MVER);
+
+ /* Check revision register scheme */
+ scheme = mvr >> OMAP_UART_MVR_SCHEME_SHIFT;
+
+ switch (scheme) {
+ case 0: /* Legacy Scheme: OMAP2/3 */
+ /* MINOR_REV[0:4], MAJOR_REV[4:7] */
+ major = (mvr & OMAP_UART_LEGACY_MVR_MAJ_MASK) >>
+ OMAP_UART_LEGACY_MVR_MAJ_SHIFT;
+ minor = (mvr & OMAP_UART_LEGACY_MVR_MIN_MASK);
+ break;
+ case 1:
+ /* New Scheme: OMAP4+ */
+ /* MINOR_REV[0:5], MAJOR_REV[8:10] */
+ major = (mvr & OMAP_UART_MVR_MAJ_MASK) >>
+ OMAP_UART_MVR_MAJ_SHIFT;
+ minor = (mvr & OMAP_UART_MVR_MIN_MASK);
+ break;
+ default:
+ dev_warn(&up->pdev->dev,
+ "Unknown %s revision, defaulting to highest\n",
+ up->name);
+ /* highest possible revision */
+ major = 0xff;
+ minor = 0xff;
+ }
+
+ /* normalize revision for the driver */
+ revision = UART_BUILD_REVISION(major, minor);
+
+ switch (revision) {
+ case OMAP_UART_REV_46:
+ up->errata |= (UART_ERRATA_i202_MDR1_ACCESS |
+ UART_ERRATA_i291_DMA_FORCEIDLE);
+ break;
+ case OMAP_UART_REV_52:
+ up->errata |= (UART_ERRATA_i202_MDR1_ACCESS |
+ UART_ERRATA_i291_DMA_FORCEIDLE);
+ break;
+ case OMAP_UART_REV_63:
+ up->errata |= UART_ERRATA_i202_MDR1_ACCESS;
+ break;
+ default:
+ break;
+ }
+}
+
static struct omap_uart_port_info *of_get_uart_port_info(struct device *dev)
{
struct omap_uart_port_info *omap_up_info;
@@ -1439,7 +1510,6 @@ static int serial_omap_probe(struct platform_device *pdev)
"%d\n", DEFAULT_CLK_SPEED);
}
up->uart_dma.uart_base = mem->start;
- up->errata = omap_up_info->errata;
if (omap_up_info->dma_enabled) {
up->uart_dma.uart_dma_tx = dma_tx->start;
@@ -1469,6 +1539,8 @@ static int serial_omap_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
+ omap_serial_fill_features_erratas(up);
+
ui[up->port.line] = up;
serial_omap_add_console_port(up);
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index c2816f4..4fdec6a6 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -39,6 +39,7 @@ enum {
PCH_UART_HANDLED_RX_ERR_INT_SHIFT,
PCH_UART_HANDLED_RX_TRG_INT_SHIFT,
PCH_UART_HANDLED_MS_INT_SHIFT,
+ PCH_UART_HANDLED_LS_INT_SHIFT,
};
enum {
@@ -63,6 +64,8 @@ enum {
PCH_UART_HANDLED_RX_TRG_INT_SHIFT)<<1))
#define PCH_UART_HANDLED_MS_INT (1<<((PCH_UART_HANDLED_MS_INT_SHIFT)<<1))
+#define PCH_UART_HANDLED_LS_INT (1<<((PCH_UART_HANDLED_LS_INT_SHIFT)<<1))
+
#define PCH_UART_RBR 0x00
#define PCH_UART_THR 0x00
@@ -229,7 +232,6 @@ struct eg20t_port {
int start_tx;
int start_rx;
int tx_empty;
- int int_dis_flag;
int trigger;
int trigger_level;
struct pch_uart_buffer rxbuf;
@@ -237,7 +239,6 @@ struct eg20t_port {
unsigned int fcr;
unsigned int mcr;
unsigned int use_dma;
- unsigned int use_dma_flag;
struct dma_async_tx_descriptor *desc_tx;
struct dma_async_tx_descriptor *desc_rx;
struct pch_dma_slave param_tx;
@@ -560,14 +561,10 @@ static int pch_uart_hal_read(struct eg20t_port *priv, unsigned char *buf,
return i;
}
-static unsigned int pch_uart_hal_get_iid(struct eg20t_port *priv)
+static unsigned char pch_uart_hal_get_iid(struct eg20t_port *priv)
{
- unsigned int iir;
- int ret;
-
- iir = ioread8(priv->membase + UART_IIR);
- ret = (iir & (PCH_UART_IIR_IID | PCH_UART_IIR_TOI | PCH_UART_IIR_IP));
- return ret;
+ return ioread8(priv->membase + UART_IIR) &\
+ (PCH_UART_IIR_IID | PCH_UART_IIR_TOI | PCH_UART_IIR_IP);
}
static u8 pch_uart_hal_get_line_status(struct eg20t_port *priv)
@@ -666,10 +663,13 @@ static void pch_free_dma(struct uart_port *port)
dma_release_channel(priv->chan_rx);
priv->chan_rx = NULL;
}
- if (sg_dma_address(&priv->sg_rx))
- dma_free_coherent(port->dev, port->fifosize,
- sg_virt(&priv->sg_rx),
- sg_dma_address(&priv->sg_rx));
+
+ if (priv->rx_buf_dma) {
+ dma_free_coherent(port->dev, port->fifosize, priv->rx_buf_virt,
+ priv->rx_buf_dma);
+ priv->rx_buf_virt = NULL;
+ priv->rx_buf_dma = 0;
+ }
return;
}
@@ -1053,12 +1053,17 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
unsigned int handled;
u8 lsr;
int ret = 0;
- unsigned int iid;
+ unsigned char iid;
unsigned long flags;
+ int next = 1;
+ u8 msr;
spin_lock_irqsave(&priv->port.lock, flags);
handled = 0;
- while ((iid = pch_uart_hal_get_iid(priv)) > 1) {
+ while (next) {
+ iid = pch_uart_hal_get_iid(priv);
+ if (iid & PCH_UART_IIR_IP) /* No Interrupt */
+ break;
switch (iid) {
case PCH_UART_IID_RLS: /* Receiver Line Status */
lsr = pch_uart_hal_get_line_status(priv);
@@ -1066,6 +1071,8 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
UART_LSR_PE | UART_LSR_OE)) {
pch_uart_err_ir(priv, lsr);
ret = PCH_UART_HANDLED_RX_ERR_INT;
+ } else {
+ ret = PCH_UART_HANDLED_LS_INT;
}
break;
case PCH_UART_IID_RDR: /* Received Data Ready */
@@ -1092,20 +1099,22 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
ret = handle_tx(priv);
break;
case PCH_UART_IID_MS: /* Modem Status */
- ret = PCH_UART_HANDLED_MS_INT;
+ msr = pch_uart_hal_get_modem(priv);
+ next = 0; /* MS ir prioirty is the lowest. So, MS ir
+ means final interrupt */
+ if ((msr & UART_MSR_ANY_DELTA) == 0)
+ break;
+ ret |= PCH_UART_HANDLED_MS_INT;
break;
default: /* Never junp to this label */
- dev_err(priv->port.dev, "%s:iid=%d (%lu)\n", __func__,
+ dev_err(priv->port.dev, "%s:iid=%02x (%lu)\n", __func__,
iid, jiffies);
ret = -1;
+ next = 0;
break;
}
handled |= (unsigned int)ret;
}
- if (handled == 0 && iid <= 1) {
- if (priv->int_dis_flag)
- priv->int_dis_flag = 0;
- }
spin_unlock_irqrestore(&priv->port.lock, flags);
return IRQ_RETVAL(handled);
@@ -1200,7 +1209,6 @@ static void pch_uart_stop_rx(struct uart_port *port)
priv = container_of(port, struct eg20t_port, port);
priv->start_rx = 0;
pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT);
- priv->int_dis_flag = 1;
}
/* Enable the modem status interrupts. */
@@ -1447,7 +1455,6 @@ static int pch_uart_verify_port(struct uart_port *port,
__func__);
return -EOPNOTSUPP;
#endif
- priv->use_dma_flag = 1;
dev_info(priv->port.dev, "PCH UART : Use DMA Mode\n");
if (!priv->use_dma)
pch_request_dma(port);
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 9c4c05b..246b823 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2282,6 +2282,7 @@ void uart_unregister_driver(struct uart_driver *drv)
tty_unregister_driver(p);
put_tty_driver(p);
kfree(drv->state);
+ drv->state = NULL;
drv->tty_driver = NULL;
}
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index 593d40a..5ed0daa 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -3338,9 +3338,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
printk("%s(%d):block_til_ready blocking on %s count=%d\n",
__FILE__,__LINE__, tty->driver->name, port->count );
- tty_unlock();
+ tty_unlock(tty);
schedule();
- tty_lock();
+ tty_lock(tty);
}
set_current_state(TASK_RUNNING);
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index aa1debf..45b43f1 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -3336,9 +3336,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
}
DBGINFO(("%s block_til_ready wait\n", tty->driver->name));
- tty_unlock();
+ tty_unlock(tty);
schedule();
- tty_lock();
+ tty_lock(tty);
}
set_current_state(TASK_RUNNING);
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index a3dddc1..4a1e4f0 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -3357,9 +3357,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
printk("%s(%d):%s block_til_ready() count=%d\n",
__FILE__,__LINE__, tty->driver->name, port->count );
- tty_unlock();
+ tty_unlock(tty);
schedule();
- tty_lock();
+ tty_lock(tty);
}
set_current_state(TASK_RUNNING);
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 6c9b7cd..91e326f 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -185,25 +185,19 @@ static struct tty_buffer *tty_buffer_find(struct tty_struct *tty, size_t size)
/* Should possibly check if this fails for the largest buffer we
have queued and recycle that ? */
}
-
/**
- * tty_buffer_request_room - grow tty buffer if needed
+ * __tty_buffer_request_room - grow tty buffer if needed
* @tty: tty structure
* @size: size desired
*
* Make at least size bytes of linear space available for the tty
* buffer. If we fail return the size we managed to find.
- *
- * Locking: Takes tty->buf.lock
+ * Locking: Caller must hold tty->buf.lock
*/
-int tty_buffer_request_room(struct tty_struct *tty, size_t size)
+static int __tty_buffer_request_room(struct tty_struct *tty, size_t size)
{
struct tty_buffer *b, *n;
int left;
- unsigned long flags;
-
- spin_lock_irqsave(&tty->buf.lock, flags);
-
/* OPTIMISATION: We could keep a per tty "zero" sized buffer to
remove this conditional if its worth it. This would be invisible
to the callers */
@@ -225,9 +219,30 @@ int tty_buffer_request_room(struct tty_struct *tty, size_t size)
size = left;
}
- spin_unlock_irqrestore(&tty->buf.lock, flags);
return size;
}
+
+
+/**
+ * tty_buffer_request_room - grow tty buffer if needed
+ * @tty: tty structure
+ * @size: size desired
+ *
+ * Make at least size bytes of linear space available for the tty
+ * buffer. If we fail return the size we managed to find.
+ *
+ * Locking: Takes tty->buf.lock
+ */
+int tty_buffer_request_room(struct tty_struct *tty, size_t size)
+{
+ unsigned long flags;
+ int length;
+
+ spin_lock_irqsave(&tty->buf.lock, flags);
+ length = __tty_buffer_request_room(tty, size);
+ spin_unlock_irqrestore(&tty->buf.lock, flags);
+ return length;
+}
EXPORT_SYMBOL_GPL(tty_buffer_request_room);
/**
@@ -249,14 +264,22 @@ int tty_insert_flip_string_fixed_flag(struct tty_struct *tty,
int copied = 0;
do {
int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE);
- int space = tty_buffer_request_room(tty, goal);
- struct tty_buffer *tb = tty->buf.tail;
+ int space;
+ unsigned long flags;
+ struct tty_buffer *tb;
+
+ spin_lock_irqsave(&tty->buf.lock, flags);
+ space = __tty_buffer_request_room(tty, goal);
+ tb = tty->buf.tail;
/* If there is no space then tb may be NULL */
- if (unlikely(space == 0))
+ if (unlikely(space == 0)) {
+ spin_unlock_irqrestore(&tty->buf.lock, flags);
break;
+ }
memcpy(tb->char_buf_ptr + tb->used, chars, space);
memset(tb->flag_buf_ptr + tb->used, flag, space);
tb->used += space;
+ spin_unlock_irqrestore(&tty->buf.lock, flags);
copied += space;
chars += space;
/* There is a small chance that we need to split the data over
@@ -286,14 +309,22 @@ int tty_insert_flip_string_flags(struct tty_struct *tty,
int copied = 0;
do {
int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE);
- int space = tty_buffer_request_room(tty, goal);
- struct tty_buffer *tb = tty->buf.tail;
+ int space;
+ unsigned long __flags;
+ struct tty_buffer *tb;
+
+ spin_lock_irqsave(&tty->buf.lock, __flags);
+ space = __tty_buffer_request_room(tty, goal);
+ tb = tty->buf.tail;
/* If there is no space then tb may be NULL */
- if (unlikely(space == 0))
+ if (unlikely(space == 0)) {
+ spin_unlock_irqrestore(&tty->buf.lock, __flags);
break;
+ }
memcpy(tb->char_buf_ptr + tb->used, chars, space);
memcpy(tb->flag_buf_ptr + tb->used, flags, space);
tb->used += space;
+ spin_unlock_irqrestore(&tty->buf.lock, __flags);
copied += space;
chars += space;
flags += space;
@@ -344,13 +375,20 @@ EXPORT_SYMBOL(tty_schedule_flip);
int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars,
size_t size)
{
- int space = tty_buffer_request_room(tty, size);
+ int space;
+ unsigned long flags;
+ struct tty_buffer *tb;
+
+ spin_lock_irqsave(&tty->buf.lock, flags);
+ space = __tty_buffer_request_room(tty, size);
+
+ tb = tty->buf.tail;
if (likely(space)) {
- struct tty_buffer *tb = tty->buf.tail;
*chars = tb->char_buf_ptr + tb->used;
memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
tb->used += space;
}
+ spin_unlock_irqrestore(&tty->buf.lock, flags);
return space;
}
EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
@@ -374,13 +412,20 @@ EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
int tty_prepare_flip_string_flags(struct tty_struct *tty,
unsigned char **chars, char **flags, size_t size)
{
- int space = tty_buffer_request_room(tty, size);
+ int space;
+ unsigned long __flags;
+ struct tty_buffer *tb;
+
+ spin_lock_irqsave(&tty->buf.lock, __flags);
+ space = __tty_buffer_request_room(tty, size);
+
+ tb = tty->buf.tail;
if (likely(space)) {
- struct tty_buffer *tb = tty->buf.tail;
*chars = tb->char_buf_ptr + tb->used;
*flags = tb->flag_buf_ptr + tb->used;
tb->used += space;
}
+ spin_unlock_irqrestore(&tty->buf.lock, __flags);
return space;
}
EXPORT_SYMBOL_GPL(tty_prepare_flip_string_flags);
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index d939bd7..9e930c0 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -185,6 +185,7 @@ void free_tty_struct(struct tty_struct *tty)
put_device(tty->dev);
kfree(tty->write_buf);
tty_buffer_free_all(tty);
+ tty->magic = 0xDEADDEAD;
kfree(tty);
}
@@ -573,7 +574,7 @@ void __tty_hangup(struct tty_struct *tty)
}
spin_unlock(&redirect_lock);
- tty_lock();
+ tty_lock(tty);
/* some functions below drop BTM, so we need this bit */
set_bit(TTY_HUPPING, &tty->flags);
@@ -666,7 +667,7 @@ void __tty_hangup(struct tty_struct *tty)
clear_bit(TTY_HUPPING, &tty->flags);
tty_ldisc_enable(tty);
- tty_unlock();
+ tty_unlock(tty);
if (f)
fput(f);
@@ -855,10 +856,11 @@ void disassociate_ctty(int on_exit)
*/
void no_tty(void)
{
+ /* FIXME: Review locking here. The tty_lock never covered any race
+ between a new association and proc_clear_tty but possible we need
+ to protect against this anyway */
struct task_struct *tsk = current;
- tty_lock();
disassociate_ctty(0);
- tty_unlock();
proc_clear_tty(tsk);
}
@@ -1102,12 +1104,12 @@ void tty_write_message(struct tty_struct *tty, char *msg)
{
if (tty) {
mutex_lock(&tty->atomic_write_lock);
- tty_lock();
+ tty_lock(tty);
if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags)) {
- tty_unlock();
+ tty_unlock(tty);
tty->ops->write(tty, msg, strlen(msg));
} else
- tty_unlock();
+ tty_unlock(tty);
tty_write_unlock(tty);
}
return;
@@ -1402,6 +1404,7 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)
}
initialize_tty_struct(tty, driver, idx);
+ tty_lock(tty);
retval = tty_driver_install_tty(driver, tty);
if (retval < 0)
goto err_deinit_tty;
@@ -1414,9 +1417,11 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)
retval = tty_ldisc_setup(tty, tty->link);
if (retval)
goto err_release_tty;
+ /* Return the tty locked so that it cannot vanish under the caller */
return tty;
err_deinit_tty:
+ tty_unlock(tty);
deinitialize_tty_struct(tty);
free_tty_struct(tty);
err_module_put:
@@ -1425,6 +1430,7 @@ err_module_put:
/* call the tty release_tty routine to clean out this slot */
err_release_tty:
+ tty_unlock(tty);
printk_ratelimited(KERN_INFO "tty_init_dev: ldisc open failed, "
"clearing slot %d\n", idx);
release_tty(tty, idx);
@@ -1627,7 +1633,7 @@ int tty_release(struct inode *inode, struct file *filp)
if (tty_paranoia_check(tty, inode, __func__))
return 0;
- tty_lock();
+ tty_lock(tty);
check_tty_count(tty, __func__);
__tty_fasync(-1, filp, 0);
@@ -1636,10 +1642,11 @@ int tty_release(struct inode *inode, struct file *filp)
pty_master = (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
tty->driver->subtype == PTY_TYPE_MASTER);
devpts = (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM) != 0;
+ /* Review: parallel close */
o_tty = tty->link;
if (tty_release_checks(tty, o_tty, idx)) {
- tty_unlock();
+ tty_unlock(tty);
return 0;
}
@@ -1651,7 +1658,7 @@ int tty_release(struct inode *inode, struct file *filp)
if (tty->ops->close)
tty->ops->close(tty, filp);
- tty_unlock();
+ tty_unlock(tty);
/*
* Sanity check: if tty->count is going to zero, there shouldn't be
* any waiters on tty->read_wait or tty->write_wait. We test the
@@ -1674,7 +1681,7 @@ int tty_release(struct inode *inode, struct file *filp)
opens on /dev/tty */
mutex_lock(&tty_mutex);
- tty_lock();
+ tty_lock_pair(tty, o_tty);
tty_closing = tty->count <= 1;
o_tty_closing = o_tty &&
(o_tty->count <= (pty_master ? 1 : 0));
@@ -1705,7 +1712,7 @@ int tty_release(struct inode *inode, struct file *filp)
printk(KERN_WARNING "%s: %s: read/write wait queue active!\n",
__func__, tty_name(tty, buf));
- tty_unlock();
+ tty_unlock_pair(tty, o_tty);
mutex_unlock(&tty_mutex);
schedule();
}
@@ -1768,7 +1775,7 @@ int tty_release(struct inode *inode, struct file *filp)
/* check whether both sides are closing ... */
if (!tty_closing || (o_tty && !o_tty_closing)) {
- tty_unlock();
+ tty_unlock_pair(tty, o_tty);
return 0;
}
@@ -1781,14 +1788,16 @@ int tty_release(struct inode *inode, struct file *filp)
tty_ldisc_release(tty, o_tty);
/*
* The release_tty function takes care of the details of clearing
- * the slots and preserving the termios structure.
+ * the slots and preserving the termios structure. The tty_unlock_pair
+ * should be safe as we keep a kref while the tty is locked (so the
+ * unlock never unlocks a freed tty).
*/
release_tty(tty, idx);
+ tty_unlock_pair(tty, o_tty);
/* Make this pty number available for reallocation */
if (devpts)
devpts_kill_index(inode, idx);
- tty_unlock();
return 0;
}
@@ -1800,6 +1809,9 @@ int tty_release(struct inode *inode, struct file *filp)
*
* We cannot return driver and index like for the other nodes because
* devpts will not work then. It expects inodes to be from devpts FS.
+ *
+ * We need to move to returning a refcounted object from all the lookup
+ * paths including this one.
*/
static struct tty_struct *tty_open_current_tty(dev_t device, struct file *filp)
{
@@ -1816,6 +1828,7 @@ static struct tty_struct *tty_open_current_tty(dev_t device, struct file *filp)
/* noctty = 1; */
tty_kref_put(tty);
/* FIXME: we put a reference and return a TTY! */
+ /* This is only safe because the caller holds tty_mutex */
return tty;
}
@@ -1888,6 +1901,9 @@ static struct tty_driver *tty_lookup_driver(dev_t device, struct file *filp,
* Locking: tty_mutex protects tty, tty_lookup_driver and tty_init_dev.
* tty->count should protect the rest.
* ->siglock protects ->signal/->sighand
+ *
+ * Note: the tty_unlock/lock cases without a ref are only safe due to
+ * tty_mutex
*/
static int tty_open(struct inode *inode, struct file *filp)
@@ -1911,8 +1927,7 @@ retry_open:
retval = 0;
mutex_lock(&tty_mutex);
- tty_lock();
-
+ /* This is protected by the tty_mutex */
tty = tty_open_current_tty(device, filp);
if (IS_ERR(tty)) {
retval = PTR_ERR(tty);
@@ -1933,17 +1948,19 @@ retry_open:
}
if (tty) {
+ tty_lock(tty);
retval = tty_reopen(tty);
- if (retval)
+ if (retval < 0) {
+ tty_unlock(tty);
tty = ERR_PTR(retval);
- } else
+ }
+ } else /* Returns with the tty_lock held for now */
tty = tty_init_dev(driver, index);
mutex_unlock(&tty_mutex);
if (driver)
tty_driver_kref_put(driver);
if (IS_ERR(tty)) {
- tty_unlock();
retval = PTR_ERR(tty);
goto err_file;
}
@@ -1972,7 +1989,7 @@ retry_open:
printk(KERN_DEBUG "%s: error %d in opening %s...\n", __func__,
retval, tty->name);
#endif
- tty_unlock(); /* need to call tty_release without BTM */
+ tty_unlock(tty); /* need to call tty_release without BTM */
tty_release(inode, filp);
if (retval != -ERESTARTSYS)
return retval;
@@ -1984,17 +2001,15 @@ retry_open:
/*
* Need to reset f_op in case a hangup happened.
*/
- tty_lock();
if (filp->f_op == &hung_up_tty_fops)
filp->f_op = &tty_fops;
- tty_unlock();
goto retry_open;
}
- tty_unlock();
+ tty_unlock(tty);
mutex_lock(&tty_mutex);
- tty_lock();
+ tty_lock(tty);
spin_lock_irq(&current->sighand->siglock);
if (!noctty &&
current->signal->leader &&
@@ -2002,11 +2017,10 @@ retry_open:
tty->session == NULL)
__proc_set_tty(current, tty);
spin_unlock_irq(&current->sighand->siglock);
- tty_unlock();
+ tty_unlock(tty);
mutex_unlock(&tty_mutex);
return 0;
err_unlock:
- tty_unlock();
mutex_unlock(&tty_mutex);
/* after locks to avoid deadlock */
if (!IS_ERR_OR_NULL(driver))
@@ -2089,10 +2103,13 @@ out:
static int tty_fasync(int fd, struct file *filp, int on)
{
+ struct tty_struct *tty = file_tty(filp);
int retval;
- tty_lock();
+
+ tty_lock(tty);
retval = __tty_fasync(fd, filp, on);
- tty_unlock();
+ tty_unlock(tty);
+
return retval;
}
@@ -2929,6 +2946,7 @@ void initialize_tty_struct(struct tty_struct *tty,
tty->pgrp = NULL;
tty->overrun_time = jiffies;
tty_buffer_init(tty);
+ mutex_init(&tty->legacy_mutex);
mutex_init(&tty->termios_mutex);
mutex_init(&tty->ldisc_mutex);
init_waitqueue_head(&tty->write_wait);
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 24b95db..173a900 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -28,7 +28,6 @@
static DEFINE_SPINLOCK(tty_ldisc_lock);
static DECLARE_WAIT_QUEUE_HEAD(tty_ldisc_wait);
-static DECLARE_WAIT_QUEUE_HEAD(tty_ldisc_idle);
/* Line disc dispatch table */
static struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
@@ -65,7 +64,7 @@ static void put_ldisc(struct tty_ldisc *ld)
return;
}
local_irq_restore(flags);
- wake_up(&tty_ldisc_idle);
+ wake_up(&ld->wq_idle);
}
/**
@@ -200,6 +199,8 @@ static struct tty_ldisc *tty_ldisc_get(int disc)
ld->ops = ldops;
atomic_set(&ld->users, 1);
+ init_waitqueue_head(&ld->wq_idle);
+
return ld;
}
@@ -538,7 +539,7 @@ static void tty_ldisc_flush_works(struct tty_struct *tty)
static int tty_ldisc_wait_idle(struct tty_struct *tty, long timeout)
{
long ret;
- ret = wait_event_timeout(tty_ldisc_idle,
+ ret = wait_event_timeout(tty->ldisc->wq_idle,
atomic_read(&tty->ldisc->users) == 1, timeout);
return ret > 0 ? 0 : -EBUSY;
}
@@ -567,7 +568,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
if (IS_ERR(new_ldisc))
return PTR_ERR(new_ldisc);
- tty_lock();
+ tty_lock(tty);
/*
* We need to look at the tty locking here for pty/tty pairs
* when both sides try to change in parallel.
@@ -581,12 +582,12 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
*/
if (tty->ldisc->ops->num == ldisc) {
- tty_unlock();
+ tty_unlock(tty);
tty_ldisc_put(new_ldisc);
return 0;
}
- tty_unlock();
+ tty_unlock(tty);
/*
* Problem: What do we do if this blocks ?
* We could deadlock here
@@ -594,7 +595,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
tty_wait_until_sent(tty, 0);
- tty_lock();
+ tty_lock(tty);
mutex_lock(&tty->ldisc_mutex);
/*
@@ -604,10 +605,10 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
while (test_bit(TTY_LDISC_CHANGING, &tty->flags)) {
mutex_unlock(&tty->ldisc_mutex);
- tty_unlock();
+ tty_unlock(tty);
wait_event(tty_ldisc_wait,
test_bit(TTY_LDISC_CHANGING, &tty->flags) == 0);
- tty_lock();
+ tty_lock(tty);
mutex_lock(&tty->ldisc_mutex);
}
@@ -622,7 +623,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
o_ldisc = tty->ldisc;
- tty_unlock();
+ tty_unlock(tty);
/*
* Make sure we don't change while someone holds a
* reference to the line discipline. The TTY_LDISC bit
@@ -649,7 +650,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
retval = tty_ldisc_wait_idle(tty, 5 * HZ);
- tty_lock();
+ tty_lock(tty);
mutex_lock(&tty->ldisc_mutex);
/* handle wait idle failure locked */
@@ -664,7 +665,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
clear_bit(TTY_LDISC_CHANGING, &tty->flags);
mutex_unlock(&tty->ldisc_mutex);
tty_ldisc_put(new_ldisc);
- tty_unlock();
+ tty_unlock(tty);
return -EIO;
}
@@ -707,7 +708,7 @@ enable:
if (o_work)
schedule_work(&o_tty->buf.work);
mutex_unlock(&tty->ldisc_mutex);
- tty_unlock();
+ tty_unlock(tty);
return retval;
}
@@ -815,11 +816,11 @@ void tty_ldisc_hangup(struct tty_struct *tty)
* need to wait for another function taking the BTM
*/
clear_bit(TTY_LDISC, &tty->flags);
- tty_unlock();
+ tty_unlock(tty);
cancel_work_sync(&tty->buf.work);
mutex_unlock(&tty->ldisc_mutex);
retry:
- tty_lock();
+ tty_lock(tty);
mutex_lock(&tty->ldisc_mutex);
/* At this point we have a closed ldisc and we want to
@@ -830,7 +831,7 @@ retry:
if (atomic_read(&tty->ldisc->users) != 1) {
char cur_n[TASK_COMM_LEN], tty_n[64];
long timeout = 3 * HZ;
- tty_unlock();
+ tty_unlock(tty);
while (tty_ldisc_wait_idle(tty, timeout) == -EBUSY) {
timeout = MAX_SCHEDULE_TIMEOUT;
@@ -911,10 +912,10 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty)
* race with the set_ldisc code path.
*/
- tty_unlock();
+ tty_unlock(tty);
tty_ldisc_halt(tty);
tty_ldisc_flush_works(tty);
- tty_lock();
+ tty_lock(tty);
mutex_lock(&tty->ldisc_mutex);
/*
diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c
index 9ff986c..69adc80 100644
--- a/drivers/tty/tty_mutex.c
+++ b/drivers/tty/tty_mutex.c
@@ -4,29 +4,59 @@
#include <linux/semaphore.h>
#include <linux/sched.h>
-/*
- * The 'big tty mutex'
- *
- * This mutex is taken and released by tty_lock() and tty_unlock(),
- * replacing the older big kernel lock.
- * It can no longer be taken recursively, and does not get
- * released implicitly while sleeping.
- *
- * Don't use in new code.
- */
-static DEFINE_MUTEX(big_tty_mutex);
+/* Legacy tty mutex glue */
/*
* Getting the big tty mutex.
*/
-void __lockfunc tty_lock(void)
+
+void __lockfunc tty_lock(struct tty_struct *tty)
{
- mutex_lock(&big_tty_mutex);
+ if (tty->magic != TTY_MAGIC) {
+ printk(KERN_ERR "L Bad %p\n", tty);
+ WARN_ON(1);
+ return;
+ }
+ tty_kref_get(tty);
+ mutex_lock(&tty->legacy_mutex);
}
EXPORT_SYMBOL(tty_lock);
-void __lockfunc tty_unlock(void)
+void __lockfunc tty_unlock(struct tty_struct *tty)
{
- mutex_unlock(&big_tty_mutex);
+ if (tty->magic != TTY_MAGIC) {
+ printk(KERN_ERR "U Bad %p\n", tty);
+ WARN_ON(1);
+ return;
+ }
+ mutex_unlock(&tty->legacy_mutex);
+ tty_kref_put(tty);
}
EXPORT_SYMBOL(tty_unlock);
+
+/*
+ * Getting the big tty mutex for a pair of ttys with lock ordering
+ * On a non pty/tty pair tty2 can be NULL which is just fine.
+ */
+void __lockfunc tty_lock_pair(struct tty_struct *tty,
+ struct tty_struct *tty2)
+{
+ if (tty < tty2) {
+ tty_lock(tty);
+ tty_lock(tty2);
+ } else {
+ if (tty2 && tty2 != tty)
+ tty_lock(tty2);
+ tty_lock(tty);
+ }
+}
+EXPORT_SYMBOL(tty_lock_pair);
+
+void __lockfunc tty_unlock_pair(struct tty_struct *tty,
+ struct tty_struct *tty2)
+{
+ tty_unlock(tty);
+ if (tty2 && tty2 != tty)
+ tty_unlock(tty2);
+}
+EXPORT_SYMBOL(tty_unlock_pair);
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index bf6e238..d9cca95 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -230,7 +230,7 @@ int tty_port_block_til_ready(struct tty_port *port,
/* block if port is in the process of being closed */
if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
- wait_event_interruptible_tty(port->close_wait,
+ wait_event_interruptible_tty(tty, port->close_wait,
!(port->flags & ASYNC_CLOSING));
if (port->flags & ASYNC_HUP_NOTIFY)
return -EAGAIN;
@@ -296,9 +296,9 @@ int tty_port_block_til_ready(struct tty_port *port,
retval = -ERESTARTSYS;
break;
}
- tty_unlock();
+ tty_unlock(tty);
schedule();
- tty_lock();
+ tty_lock(tty);
}
finish_wait(&port->open_wait, &wait);
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index 8308fc7..2aaa0c2 100644
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -19,6 +19,7 @@
#include <linux/init.h>
#include <linux/tty.h>
#include <asm/uaccess.h>
+#include <linux/console.h>
#include <linux/consolemap.h>
#include <linux/vt_kern.h>
@@ -312,6 +313,7 @@ int con_set_trans_old(unsigned char __user * arg)
if (!access_ok(VERIFY_READ, arg, E_TABSZ))
return -EFAULT;
+ console_lock();
for (i=0; i<E_TABSZ ; i++) {
unsigned char uc;
__get_user(uc, arg+i);
@@ -319,6 +321,7 @@ int con_set_trans_old(unsigned char __user * arg)
}
update_user_maps();
+ console_unlock();
return 0;
}
@@ -330,11 +333,13 @@ int con_get_trans_old(unsigned char __user * arg)
if (!access_ok(VERIFY_WRITE, arg, E_TABSZ))
return -EFAULT;
+ console_lock();
for (i=0; i<E_TABSZ ; i++)
- {
- ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
- __put_user((ch & ~0xff) ? 0 : ch, arg+i);
- }
+ {
+ ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
+ __put_user((ch & ~0xff) ? 0 : ch, arg+i);
+ }
+ console_unlock();
return 0;
}
@@ -346,6 +351,7 @@ int con_set_trans_new(ushort __user * arg)
if (!access_ok(VERIFY_READ, arg, E_TABSZ*sizeof(unsigned short)))
return -EFAULT;
+ console_lock();
for (i=0; i<E_TABSZ ; i++) {
unsigned short us;
__get_user(us, arg+i);
@@ -353,6 +359,7 @@ int con_set_trans_new(ushort __user * arg)
}
update_user_maps();
+ console_unlock();
return 0;
}
@@ -364,8 +371,10 @@ int con_get_trans_new(ushort __user * arg)
if (!access_ok(VERIFY_WRITE, arg, E_TABSZ*sizeof(unsigned short)))
return -EFAULT;
+ console_lock();
for (i=0; i<E_TABSZ ; i++)
__put_user(p[i], arg+i);
+ console_unlock();
return 0;
}
@@ -407,6 +416,7 @@ static void con_release_unimap(struct uni_pagedir *p)
}
}
+/* Caller must hold the console lock */
void con_free_unimap(struct vc_data *vc)
{
struct uni_pagedir *p;
@@ -487,17 +497,21 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
return 0;
}
-/* ui is a leftover from using a hashtable, but might be used again */
-int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
+/* ui is a leftover from using a hashtable, but might be used again
+ Caller must hold the lock */
+static int con_do_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
{
struct uni_pagedir *p, *q;
-
+
p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
- if (p && p->readonly) return -EIO;
+ if (p && p->readonly)
+ return -EIO;
+
if (!p || --p->refcount) {
q = kzalloc(sizeof(*p), GFP_KERNEL);
if (!q) {
- if (p) p->refcount++;
+ if (p)
+ p->refcount++;
return -ENOMEM;
}
q->refcount=1;
@@ -511,23 +525,43 @@ int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
return 0;
}
+int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
+{
+ int ret;
+ console_lock();
+ ret = con_do_clear_unimap(vc, ui);
+ console_unlock();
+ return ret;
+}
+
int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
{
int err = 0, err1, i;
struct uni_pagedir *p, *q;
+ console_lock();
+
/* Save original vc_unipagdir_loc in case we allocate a new one */
p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
- if (p->readonly) return -EIO;
+ if (p->readonly) {
+ console_unlock();
+ return -EIO;
+ }
- if (!ct) return 0;
+ if (!ct) {
+ console_unlock();
+ return 0;
+ }
if (p->refcount > 1) {
int j, k;
u16 **p1, *p2, l;
- err1 = con_clear_unimap(vc, NULL);
- if (err1) return err1;
+ err1 = con_do_clear_unimap(vc, NULL);
+ if (err1) {
+ console_unlock();
+ return err1;
+ }
/*
* Since refcount was > 1, con_clear_unimap() allocated a
@@ -558,7 +592,8 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
*vc->vc_uni_pagedir_loc = (unsigned long)p;
con_release_unimap(q);
kfree(q);
- return err1;
+ console_unlock();
+ return err1;
}
}
} else {
@@ -592,21 +627,30 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
/*
* Merge with fontmaps of any other virtual consoles.
*/
- if (con_unify_unimap(vc, p))
+ if (con_unify_unimap(vc, p)) {
+ console_unlock();
return err;
+ }
for (i = 0; i <= 3; i++)
set_inverse_transl(vc, p, i); /* Update inverse translations */
set_inverse_trans_unicode(vc, p);
-
+
+ console_unlock();
return err;
}
-/* Loads the unimap for the hardware font, as defined in uni_hash.tbl.
- The representation used was the most compact I could come up
- with. This routine is executed at sys_setup time, and when the
- PIO_FONTRESET ioctl is called. */
-
+/**
+ * con_set_default_unimap - set default unicode map
+ * @vc: the console we are updating
+ *
+ * Loads the unimap for the hardware font, as defined in uni_hash.tbl.
+ * The representation used was the most compact I could come up
+ * with. This routine is executed at video setup, and when the
+ * PIO_FONTRESET ioctl is called.
+ *
+ * The caller must hold the console lock
+ */
int con_set_default_unimap(struct vc_data *vc)
{
int i, j, err = 0, err1;
@@ -617,6 +661,7 @@ int con_set_default_unimap(struct vc_data *vc)
p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
if (p == dflt)
return 0;
+
dflt->refcount++;
*vc->vc_uni_pagedir_loc = (unsigned long)dflt;
if (p && !--p->refcount) {
@@ -628,8 +673,9 @@ int con_set_default_unimap(struct vc_data *vc)
/* The default font is always 256 characters */
- err = con_clear_unimap(vc, NULL);
- if (err) return err;
+ err = con_do_clear_unimap(vc, NULL);
+ if (err)
+ return err;
p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
q = dfont_unitable;
@@ -654,6 +700,13 @@ int con_set_default_unimap(struct vc_data *vc)
}
EXPORT_SYMBOL(con_set_default_unimap);
+/**
+ * con_copy_unimap - copy unimap between two vts
+ * @dst_vc: target
+ * @src_vt: source
+ *
+ * The caller must hold the console lock when invoking this method
+ */
int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
{
struct uni_pagedir *q;
@@ -668,13 +721,23 @@ int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
*dst_vc->vc_uni_pagedir_loc = (long)q;
return 0;
}
+EXPORT_SYMBOL(con_copy_unimap);
+/**
+ * con_get_unimap - get the unicode map
+ * @vc: the console to read from
+ *
+ * Read the console unicode data for this console. Called from the ioctl
+ * handlers.
+ */
int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
{
int i, j, k, ect;
u16 **p1, *p2;
struct uni_pagedir *p;
+ console_lock();
+
ect = 0;
if (*vc->vc_uni_pagedir_loc) {
p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
@@ -694,22 +757,19 @@ int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct uni
}
}
__put_user(ect, uct);
+ console_unlock();
return ((ect <= ct) ? 0 : -ENOMEM);
}
-void con_protect_unimap(struct vc_data *vc, int rdonly)
-{
- struct uni_pagedir *p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
-
- if (p)
- p->readonly = rdonly;
-}
-
/*
* Always use USER_MAP. These functions are used by the keyboard,
* which shouldn't be affected by G0/G1 switching, etc.
* If the user map still contains default values, i.e. the
* direct-to-font mapping, then assume user is using Latin1.
+ *
+ * FIXME: at some point we need to decide if we want to lock the table
+ * update element itself via the keyboard_event_lock for consistency with the
+ * keyboard driver as well as the consoles
*/
/* may be called during an interrupt */
u32 conv_8bit_to_uni(unsigned char c)
@@ -777,4 +837,3 @@ console_map_init(void)
con_set_default_unimap(vc_cons[i].d);
}
-EXPORT_SYMBOL(con_copy_unimap);
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 2156188..84cbf29 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3892,36 +3892,6 @@ static void set_palette(struct vc_data *vc)
vc->vc_sw->con_set_palette(vc, color_table);
}
-static int set_get_cmap(unsigned char __user *arg, int set)
-{
- int i, j, k;
-
- WARN_CONSOLE_UNLOCKED();
-
- for (i = 0; i < 16; i++)
- if (set) {
- get_user(default_red[i], arg++);
- get_user(default_grn[i], arg++);
- get_user(default_blu[i], arg++);
- } else {
- put_user(default_red[i], arg++);
- put_user(default_grn[i], arg++);
- put_user(default_blu[i], arg++);
- }
- if (set) {
- for (i = 0; i < MAX_NR_CONSOLES; i++)
- if (vc_cons_allocated(i)) {
- for (j = k = 0; j < 16; j++) {
- vc_cons[i].d->vc_palette[k++] = default_red[j];
- vc_cons[i].d->vc_palette[k++] = default_grn[j];
- vc_cons[i].d->vc_palette[k++] = default_blu[j];
- }
- set_palette(vc_cons[i].d);
- }
- }
- return 0;
-}
-
/*
* Load palette into the DAC registers. arg points to a colour
* map, 3 bytes per colour, 16 colours, range from 0 to 255.
@@ -3929,24 +3899,50 @@ static int set_get_cmap(unsigned char __user *arg, int set)
int con_set_cmap(unsigned char __user *arg)
{
- int rc;
+ int i, j, k;
+ unsigned char colormap[3*16];
+
+ if (copy_from_user(colormap, arg, sizeof(colormap)))
+ return -EFAULT;
console_lock();
- rc = set_get_cmap (arg,1);
+ for (i = k = 0; i < 16; i++) {
+ default_red[i] = colormap[k++];
+ default_grn[i] = colormap[k++];
+ default_blu[i] = colormap[k++];
+ }
+ for (i = 0; i < MAX_NR_CONSOLES; i++) {
+ if (!vc_cons_allocated(i))
+ continue;
+ for (j = k = 0; j < 16; j++) {
+ vc_cons[i].d->vc_palette[k++] = default_red[j];
+ vc_cons[i].d->vc_palette[k++] = default_grn[j];
+ vc_cons[i].d->vc_palette[k++] = default_blu[j];
+ }
+ set_palette(vc_cons[i].d);
+ }
console_unlock();
- return rc;
+ return 0;
}
int con_get_cmap(unsigned char __user *arg)
{
- int rc;
+ int i, k;
+ unsigned char colormap[3*16];
console_lock();
- rc = set_get_cmap (arg,0);
+ for (i = k = 0; i < 16; i++) {
+ colormap[k++] = default_red[i];
+ colormap[k++] = default_grn[i];
+ colormap[k++] = default_blu[i];
+ }
console_unlock();
- return rc;
+ if (copy_to_user(arg, colormap, sizeof(colormap)))
+ return -EFAULT;
+
+ return 0;
}
void reset_palette(struct vc_data *vc)
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index ede2ef1..6461854 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -910,7 +910,9 @@ int vt_ioctl(struct tty_struct *tty,
ret = con_font_op(vc_cons[fg_console].d, &op);
if (ret)
break;
+ console_lock();
con_set_default_unimap(vc_cons[fg_console].d);
+ console_unlock();
break;
}
#endif
@@ -934,33 +936,23 @@ int vt_ioctl(struct tty_struct *tty,
case PIO_SCRNMAP:
if (!perm)
ret = -EPERM;
- else {
- tty_lock();
+ else
ret = con_set_trans_old(up);
- tty_unlock();
- }
break;
case GIO_SCRNMAP:
- tty_lock();
ret = con_get_trans_old(up);
- tty_unlock();
break;
case PIO_UNISCRNMAP:
if (!perm)
ret = -EPERM;
- else {
- tty_lock();
+ else
ret = con_set_trans_new(up);
- tty_unlock();
- }
break;
case GIO_UNISCRNMAP:
- tty_lock();
ret = con_get_trans_new(up);
- tty_unlock();
break;
case PIO_UNIMAPCLR:
@@ -970,19 +962,14 @@ int vt_ioctl(struct tty_struct *tty,
ret = copy_from_user(&ui, up, sizeof(struct unimapinit));
if (ret)
ret = -EFAULT;
- else {
- tty_lock();
+ else
con_clear_unimap(vc, &ui);
- tty_unlock();
- }
break;
}
case PIO_UNIMAP:
case GIO_UNIMAP:
- tty_lock();
ret = do_unimap_ioctl(cmd, up, perm, vc);
- tty_unlock();
break;
case VT_LOCKSWITCH:
@@ -1196,9 +1183,7 @@ long vt_compat_ioctl(struct tty_struct *tty,
case PIO_UNIMAP:
case GIO_UNIMAP:
- tty_lock();
ret = compat_unimap_ioctl(cmd, up, perm, vc);
- tty_unlock();
break;
/*
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