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-rw-r--r--drivers/serial/68328serial.c3
-rw-r--r--drivers/serial/8250.c20
-rw-r--r--drivers/serial/8250_early.c23
-rw-r--r--drivers/serial/8250_gsc.c17
-rw-r--r--drivers/serial/8250_hp300.c35
-rw-r--r--drivers/serial/8250_hub6.c24
-rw-r--r--drivers/serial/8250_pci.c109
-rw-r--r--drivers/serial/Kconfig66
-rw-r--r--drivers/serial/Makefile1
-rw-r--r--drivers/serial/atmel_serial.c884
-rw-r--r--drivers/serial/cpm_uart/cpm_uart_core.c2
-rw-r--r--drivers/serial/crisv10.c5
-rw-r--r--drivers/serial/dz.c543
-rw-r--r--drivers/serial/dz.h11
-rw-r--r--drivers/serial/imx.c4
-rw-r--r--drivers/serial/mpc52xx_uart.c424
-rw-r--r--drivers/serial/sc26xx.c755
-rw-r--r--drivers/serial/serial_core.c59
-rw-r--r--drivers/serial/sh-sci.c2
-rw-r--r--drivers/serial/sh-sci.h9
-rw-r--r--drivers/serial/uartlite.c55
21 files changed, 2382 insertions, 669 deletions
diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c
index 0d99120..2b8a410 100644
--- a/drivers/serial/68328serial.c
+++ b/drivers/serial/68328serial.c
@@ -84,9 +84,6 @@ extern wait_queue_head_t keypress_wait;
struct tty_driver *serial_driver;
-/* serial subtype definitions */
-#define SERIAL_TYPE_NORMAL 1
-
/* number of characters left in xmit buffer before we ask for more */
#define WAKEUP_CHARS 256
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index b8a4bd9..77f7a7f 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -305,7 +305,7 @@ static inline int map_8250_out_reg(struct uart_8250_port *up, int offset)
return au_io_out_map[offset];
}
-#elif defined (CONFIG_SERIAL_8250_RM9K)
+#elif defined(CONFIG_SERIAL_8250_RM9K)
static const u8
regmap_in[8] = {
@@ -475,7 +475,7 @@ static inline void _serial_dl_write(struct uart_8250_port *up, int value)
serial_outp(up, UART_DLM, value >> 8 & 0xff);
}
-#if defined (CONFIG_SERIAL_8250_AU1X00)
+#if defined(CONFIG_SERIAL_8250_AU1X00)
/* Au1x00 haven't got a standard divisor latch */
static int serial_dl_read(struct uart_8250_port *up)
{
@@ -492,7 +492,7 @@ static void serial_dl_write(struct uart_8250_port *up, int value)
else
_serial_dl_write(up, value);
}
-#elif defined (CONFIG_SERIAL_8250_RM9K)
+#elif defined(CONFIG_SERIAL_8250_RM9K)
static int serial_dl_read(struct uart_8250_port *up)
{
return (up->port.iotype == UPIO_RM9000) ?
@@ -1185,8 +1185,8 @@ static void autoconfig_irq(struct uart_8250_port *up)
irqs = probe_irq_on();
serial_outp(up, UART_MCR, 0);
- udelay (10);
- if (up->port.flags & UPF_FOURPORT) {
+ udelay(10);
+ if (up->port.flags & UPF_FOURPORT) {
serial_outp(up, UART_MCR,
UART_MCR_DTR | UART_MCR_RTS);
} else {
@@ -1199,7 +1199,7 @@ static void autoconfig_irq(struct uart_8250_port *up)
(void)serial_inp(up, UART_IIR);
(void)serial_inp(up, UART_MSR);
serial_outp(up, UART_TX, 0xFF);
- udelay (20);
+ udelay(20);
irq = probe_irq_off(irqs);
serial_outp(up, UART_MCR, save_mcr);
@@ -1343,7 +1343,7 @@ receive_chars(struct uart_8250_port *up, unsigned int *status)
uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag);
- ignore_char:
+ignore_char:
lsr = serial_inp(up, UART_LSR);
} while ((lsr & UART_LSR_DR) && (max_count-- > 0));
spin_unlock(&up->port.lock);
@@ -1633,7 +1633,8 @@ static void serial8250_backup_timeout(unsigned long data)
serial_out(up, UART_IER, ier);
/* Standard timer interval plus 0.2s to keep the port running */
- mod_timer(&up->timer, jiffies + poll_timeout(up->port.timeout) + HZ/5);
+ mod_timer(&up->timer,
+ jiffies + poll_timeout(up->port.timeout) + HZ / 5);
}
static unsigned int serial8250_tx_empty(struct uart_port *port)
@@ -1844,7 +1845,7 @@ static int serial8250_startup(struct uart_port *port)
up->timer.function = serial8250_backup_timeout;
up->timer.data = (unsigned long)up;
mod_timer(&up->timer, jiffies +
- poll_timeout(up->port.timeout) + HZ/5);
+ poll_timeout(up->port.timeout) + HZ / 5);
}
}
@@ -2173,6 +2174,7 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios,
}
serial8250_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
+ tty_termios_encode_baud_rate(termios, baud, baud);
}
static void
diff --git a/drivers/serial/8250_early.c b/drivers/serial/8250_early.c
index 1f16de7..38776e8 100644
--- a/drivers/serial/8250_early.c
+++ b/drivers/serial/8250_early.c
@@ -82,7 +82,8 @@ static void __init serial_putc(struct uart_port *port, int c)
serial_out(port, UART_TX, c);
}
-static void __init early_serial8250_write(struct console *console, const char *s, unsigned int count)
+static void __init early_serial8250_write(struct console *console,
+ const char *s, unsigned int count)
{
struct uart_port *port = &early_device.port;
unsigned int ier;
@@ -132,7 +133,8 @@ static void __init init_port(struct early_serial8250_device *device)
serial_out(port, UART_LCR, c & ~UART_LCR_DLAB);
}
-static int __init parse_options(struct early_serial8250_device *device, char *options)
+static int __init parse_options(struct early_serial8250_device *device,
+ char *options)
{
struct uart_port *port = &device->port;
int mmio, length;
@@ -145,8 +147,10 @@ static int __init parse_options(struct early_serial8250_device *device, char *op
port->iotype = UPIO_MEM;
port->mapbase = simple_strtoul(options + 5, &options, 0);
#ifdef CONFIG_FIX_EARLYCON_MEM
- set_fixmap_nocache(FIX_EARLYCON_MEM_BASE, port->mapbase & PAGE_MASK);
- port->membase = (void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE);
+ set_fixmap_nocache(FIX_EARLYCON_MEM_BASE,
+ port->mapbase & PAGE_MASK);
+ port->membase =
+ (void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE);
port->membase += port->mapbase & ~PAGE_MASK;
#else
port->membase = ioremap(port->mapbase, 64);
@@ -165,7 +169,8 @@ static int __init parse_options(struct early_serial8250_device *device, char *op
} else
return -EINVAL;
- if ((options = strchr(options, ','))) {
+ options = strchr(options, ',');
+ if (options) {
options++;
device->baud = simple_strtoul(options, NULL, 0);
length = min(strcspn(options, " "), sizeof(device->options));
@@ -179,7 +184,7 @@ static int __init parse_options(struct early_serial8250_device *device, char *op
printk(KERN_INFO "Early serial console at %s 0x%llx (options '%s')\n",
mmio ? "MMIO" : "I/O port",
mmio ? (unsigned long long) port->mapbase
- : (unsigned long long) port->iobase,
+ : (unsigned long long) port->iobase,
device->options);
return 0;
}
@@ -199,7 +204,8 @@ static int __init early_serial8250_setup(char *options)
if (device->port.membase || device->port.iobase)
return 0;
- if ((err = parse_options(device, options)) < 0)
+ err = parse_options(device, options);
+ if (err < 0)
return err;
init_port(device);
@@ -219,7 +225,8 @@ int __init setup_early_serial8250_console(char *cmdline)
}
options = strchr(cmdline, ',') + 1;
- if ((err = early_serial8250_setup(options)) < 0)
+ err = early_serial8250_setup(options);
+ if (err < 0)
return err;
register_console(&early_serial8250_console);
diff --git a/drivers/serial/8250_gsc.c b/drivers/serial/8250_gsc.c
index c5d0add..4eb7437 100644
--- a/drivers/serial/8250_gsc.c
+++ b/drivers/serial/8250_gsc.c
@@ -25,8 +25,7 @@
#include "8250.h"
-static int __init
-serial_init_chip(struct parisc_device *dev)
+static int __init serial_init_chip(struct parisc_device *dev)
{
struct uart_port port;
unsigned long address;
@@ -38,18 +37,17 @@ serial_init_chip(struct parisc_device *dev)
* what we have here is a missing parent device, so tell
* the user what they're missing.
*/
- if (parisc_parent(dev)->id.hw_type != HPHW_IOA) {
- printk(KERN_INFO "Serial: device 0x%lx not configured.\n"
+ if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
+ printk(KERN_INFO
+ "Serial: device 0x%lx not configured.\n"
"Enable support for Wax, Lasi, Asp or Dino.\n",
dev->hpa.start);
- }
return -ENODEV;
}
address = dev->hpa.start;
- if (dev->id.sversion != 0x8d) {
+ if (dev->id.sversion != 0x8d)
address += 0x800;
- }
memset(&port, 0, sizeof(port));
port.iotype = UPIO_MEM;
@@ -63,11 +61,12 @@ serial_init_chip(struct parisc_device *dev)
err = serial8250_register_port(&port);
if (err < 0) {
- printk(KERN_WARNING "serial8250_register_port returned error %d\n", err);
+ printk(KERN_WARNING
+ "serial8250_register_port returned error %d\n", err);
iounmap(port.membase);
return err;
}
-
+
return 0;
}
diff --git a/drivers/serial/8250_hp300.c b/drivers/serial/8250_hp300.c
index 2cf0953..0e1410f 100644
--- a/drivers/serial/8250_hp300.c
+++ b/drivers/serial/8250_hp300.c
@@ -36,7 +36,7 @@ static struct hp300_port *hp300_ports;
#ifdef CONFIG_HPDCA
static int __devinit hpdca_init_one(struct dio_dev *d,
- const struct dio_device_id *ent);
+ const struct dio_device_id *ent);
static void __devexit hpdca_remove_one(struct dio_dev *d);
static struct dio_device_id hpdca_dio_tbl[] = {
@@ -85,7 +85,7 @@ extern int hp300_uart_scode;
#ifdef CONFIG_SERIAL_8250_CONSOLE
/*
- * Parse the bootinfo to find descriptions for headless console and
+ * Parse the bootinfo to find descriptions for headless console and
* debug serial ports and register them with the 8250 driver.
* This function should be called before serial_console_init() is called
* to make sure the serial console will be available for use. IA-64 kernel
@@ -126,13 +126,11 @@ int __init hp300_setup_serial_console(void)
printk(KERN_WARNING "Serial console is APCI but support is disabled (CONFIG_HPAPCI)!\n");
return 0;
#endif
- }
- else {
+ } else {
#ifdef CONFIG_HPDCA
unsigned long pa = dio_scodetophysaddr(scode);
- if (!pa) {
+ if (!pa)
return 0;
- }
printk(KERN_INFO "Serial console is HP DCA at select code %d\n", scode);
@@ -145,26 +143,23 @@ int __init hp300_setup_serial_console(void)
/* Enable board-interrupts */
out_8(pa + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
- if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80) {
+ if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80)
add_preferred_console("ttyS", port.line, "9600n8");
- }
#else
printk(KERN_WARNING "Serial console is DCA but support is disabled (CONFIG_HPDCA)!\n");
return 0;
#endif
}
- if (early_serial_setup(&port) < 0) {
+ if (early_serial_setup(&port) < 0)
printk(KERN_WARNING "hp300_setup_serial_console(): early_serial_setup() failed.\n");
- }
-
return 0;
}
#endif /* CONFIG_SERIAL_8250_CONSOLE */
#ifdef CONFIG_HPDCA
static int __devinit hpdca_init_one(struct dio_dev *d,
- const struct dio_device_id *ent)
+ const struct dio_device_id *ent)
{
struct uart_port port;
int line;
@@ -210,7 +205,7 @@ static int __devinit hpdca_init_one(struct dio_dev *d,
static int __init hp300_8250_init(void)
{
- static int called = 0;
+ static int called;
#ifdef CONFIG_HPAPCI
int line;
unsigned long base;
@@ -239,13 +234,12 @@ static int __init hp300_8250_init(void)
* Port 1 is either the console or the DCA.
*/
for (i = 1; i < 4; i++) {
- /* Port 1 is the console on a 425e, on other machines it's mapped to
- * DCA.
+ /* Port 1 is the console on a 425e, on other machines it's
+ * mapped to DCA.
*/
#ifdef CONFIG_SERIAL_8250_CONSOLE
- if (i == 1) {
+ if (i == 1)
continue;
- }
#endif
/* Create new serial device */
@@ -259,7 +253,8 @@ static int __init hp300_8250_init(void)
/* Memory mapped I/O */
uport.iotype = UPIO_MEM;
- uport.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
+ uport.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ \
+ | UPF_BOOT_AUTOCONF;
/* XXX - no interrupt support yet */
uport.irq = 0;
uport.uartclk = HPAPCI_BAUD_BASE * 16;
@@ -270,8 +265,8 @@ static int __init hp300_8250_init(void)
line = serial8250_register_port(&uport);
if (line < 0) {
- printk(KERN_NOTICE "8250_hp300: register_serial() APCI %d"
- " irq %d failed\n", i, uport.irq);
+ printk(KERN_NOTICE "8250_hp300: register_serial() APCI"
+ " %d irq %d failed\n", i, uport.irq);
kfree(port);
continue;
}
diff --git a/drivers/serial/8250_hub6.c b/drivers/serial/8250_hub6.c
index daf569c..7609150 100644
--- a/drivers/serial/8250_hub6.c
+++ b/drivers/serial/8250_hub6.c
@@ -23,18 +23,18 @@
}
static struct plat_serial8250_port hub6_data[] = {
- HUB6(0,0),
- HUB6(0,1),
- HUB6(0,2),
- HUB6(0,3),
- HUB6(0,4),
- HUB6(0,5),
- HUB6(1,0),
- HUB6(1,1),
- HUB6(1,2),
- HUB6(1,3),
- HUB6(1,4),
- HUB6(1,5),
+ HUB6(0, 0),
+ HUB6(0, 1),
+ HUB6(0, 2),
+ HUB6(0, 3),
+ HUB6(0, 4),
+ HUB6(0, 5),
+ HUB6(1, 0),
+ HUB6(1, 1),
+ HUB6(1, 2),
+ HUB6(1, 3),
+ HUB6(1, 4),
+ HUB6(1, 5),
{ },
};
diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 0a4ac2b..a8bec49 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -140,7 +140,7 @@ afavlab_setup(struct serial_private *priv, struct pciserial_board *board,
struct uart_port *port, int idx)
{
unsigned int bar, offset = board->first_offset;
-
+
bar = FL_GET_BASE(board->flags);
if (idx < 4)
bar += idx;
@@ -227,8 +227,8 @@ static int pci_inteli960ni_init(struct pci_dev *dev)
return -ENODEV;
/* is firmware started? */
- pci_read_config_dword(dev, 0x44, (void*) &oldval);
- if (oldval == 0x00001000L) { /* RESET value */
+ pci_read_config_dword(dev, 0x44, (void *)&oldval);
+ if (oldval == 0x00001000L) { /* RESET value */
printk(KERN_DEBUG "Local i960 firmware missing");
return -ENODEV;
}
@@ -253,11 +253,11 @@ static int pci_plx9050_init(struct pci_dev *dev)
irq_config = 0x41;
if (dev->vendor == PCI_VENDOR_ID_PANACOM ||
- dev->subsystem_vendor == PCI_SUBVENDOR_ID_EXSYS) {
+ dev->subsystem_vendor == PCI_SUBVENDOR_ID_EXSYS)
irq_config = 0x43;
- }
+
if ((dev->vendor == PCI_VENDOR_ID_PLX) &&
- (dev->device == PCI_DEVICE_ID_PLX_ROMULUS)) {
+ (dev->device == PCI_DEVICE_ID_PLX_ROMULUS))
/*
* As the megawolf cards have the int pins active
* high, and have 2 UART chips, both ints must be
@@ -267,8 +267,6 @@ static int pci_plx9050_init(struct pci_dev *dev)
* deep FIFOs
*/
irq_config = 0x5b;
- }
-
/*
* enable/disable interrupts
*/
@@ -343,14 +341,14 @@ static int sbs_init(struct pci_dev *dev)
{
u8 __iomem *p;
- p = ioremap(pci_resource_start(dev, 0),pci_resource_len(dev,0));
+ p = ioremap(pci_resource_start(dev, 0), pci_resource_len(dev, 0));
if (p == NULL)
return -ENOMEM;
/* Set bit-4 Control Register (UART RESET) in to reset the uarts */
- writeb(0x10,p + OCT_REG_CR_OFF);
+ writeb(0x10, p + OCT_REG_CR_OFF);
udelay(50);
- writeb(0x0,p + OCT_REG_CR_OFF);
+ writeb(0x0, p + OCT_REG_CR_OFF);
/* Set bit-2 (INTENABLE) of Control Register */
writeb(0x4, p + OCT_REG_CR_OFF);
@@ -367,10 +365,10 @@ static void __devexit sbs_exit(struct pci_dev *dev)
{
u8 __iomem *p;
- p = ioremap(pci_resource_start(dev, 0),pci_resource_len(dev,0));
- if (p != NULL) {
+ p = ioremap(pci_resource_start(dev, 0), pci_resource_len(dev, 0));
+ /* FIXME: What if resource_len < OCT_REG_CR_OFF */
+ if (p != NULL)
writeb(0, p + OCT_REG_CR_OFF);
- }
iounmap(p);
}
@@ -386,7 +384,7 @@ static void __devexit sbs_exit(struct pci_dev *dev)
* with other OSes (like M$ DOS).
*
* SIIG support added by Andrey Panin <pazke@donpac.ru>, 10/1999
- *
+ *
* There is two family of SIIG serial cards with different PCI
* interface chip and different configuration methods:
* - 10x cards have control registers in IO and/or memory space;
@@ -489,21 +487,21 @@ static const unsigned short timedia_single_port[] = {
static const unsigned short timedia_dual_port[] = {
0x0002, 0x4036, 0x4037, 0x4038, 0x4078, 0x4079, 0x4085,
- 0x4088, 0x4089, 0x5037, 0x5078, 0x5079, 0x5085, 0x6079,
- 0x7079, 0x8079, 0x8137, 0x8138, 0x8237, 0x8238, 0x9079,
+ 0x4088, 0x4089, 0x5037, 0x5078, 0x5079, 0x5085, 0x6079,
+ 0x7079, 0x8079, 0x8137, 0x8138, 0x8237, 0x8238, 0x9079,
0x9137, 0x9138, 0x9237, 0x9238, 0xA079, 0xB079, 0xC079,
0xD079, 0
};
static const unsigned short timedia_quad_port[] = {
- 0x4055, 0x4056, 0x4095, 0x4096, 0x5056, 0x8156, 0x8157,
- 0x8256, 0x8257, 0x9056, 0x9156, 0x9157, 0x9158, 0x9159,
+ 0x4055, 0x4056, 0x4095, 0x4096, 0x5056, 0x8156, 0x8157,
+ 0x8256, 0x8257, 0x9056, 0x9156, 0x9157, 0x9158, 0x9159,
0x9256, 0x9257, 0xA056, 0xA157, 0xA158, 0xA159, 0xB056,
0xB157, 0
};
static const unsigned short timedia_eight_port[] = {
- 0x4065, 0x4066, 0x5065, 0x5066, 0x8166, 0x9066, 0x9166,
+ 0x4065, 0x4066, 0x5065, 0x5066, 0x8166, 0x9066, 0x9166,
0x9167, 0x9168, 0xA066, 0xA167, 0xA168, 0
};
@@ -656,7 +654,8 @@ static int pci_ite887x_init(struct pci_dev *dev)
ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED |
ITE_887x_POSIO_IOSIZE_32 | inta_addr[i]);
/* write INTCBAR - ioport */
- pci_write_config_dword(dev, ITE_887x_INTCBAR, inta_addr[i]);
+ pci_write_config_dword(dev, ITE_887x_INTCBAR,
+ inta_addr[i]);
ret = inb(inta_addr[i]);
if (ret != 0xff) {
/* ioport connected */
@@ -755,7 +754,7 @@ pci_default_setup(struct serial_private *priv, struct pciserial_board *board,
if (board->flags & FL_REGION_SZ_CAP && idx >= maxnr)
return 1;
-
+
return setup_port(priv, port, bar, offset, board->reg_shift);
}
@@ -843,7 +842,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
.init = pci_plx9050_init,
.setup = pci_default_setup,
.exit = __devexit_p(pci_plx9050_exit),
- },
+ },
{
.vendor = PCI_VENDOR_ID_PANACOM,
.device = PCI_DEVICE_ID_PANACOM_DUALMODEM,
@@ -1032,7 +1031,7 @@ static struct pci_serial_quirk *find_quirk(struct pci_dev *dev)
quirk_id_matches(quirk->device, dev->device) &&
quirk_id_matches(quirk->subvendor, dev->subsystem_vendor) &&
quirk_id_matches(quirk->subdevice, dev->subsystem_device))
- break;
+ break;
return quirk;
}
@@ -1711,7 +1710,7 @@ static struct pciserial_board pci_boards[] __devinitdata = {
};
static const struct pci_device_id softmodem_blacklist[] = {
- { PCI_VDEVICE ( AL, 0x5457 ), }, /* ALi Corporation M5457 AC'97 Modem */
+ { PCI_VDEVICE(AL, 0x5457), }, /* ALi Corporation M5457 AC'97 Modem */
};
/*
@@ -1724,13 +1723,13 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
{
const struct pci_device_id *blacklist;
int num_iomem, num_port, first_port = -1, i;
-
+
/*
* If it is not a communications device or the programming
* interface is greater than 6, give up.
*
* (Should we try to make guesses for multiport serial devices
- * later?)
+ * later?)
*/
if ((((dev->class >> 8) != PCI_CLASS_COMMUNICATION_SERIAL) &&
((dev->class >> 8) != PCI_CLASS_COMMUNICATION_MODEM)) ||
@@ -1863,25 +1862,23 @@ pciserial_init_ports(struct pci_dev *dev, struct pciserial_board *board)
break;
#ifdef SERIAL_DEBUG_PCI
- printk("Setup PCI port: port %x, irq %d, type %d\n",
+ printk(KERN_DEBUG "Setup PCI port: port %x, irq %d, type %d\n",
serial_port.iobase, serial_port.irq, serial_port.iotype);
#endif
-
+
priv->line[i] = serial8250_register_port(&serial_port);
if (priv->line[i] < 0) {
printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), priv->line[i]);
break;
}
}
-
priv->nr = i;
-
return priv;
- err_deinit:
+err_deinit:
if (quirk->exit)
quirk->exit(dev);
- err_out:
+err_out:
return priv;
}
EXPORT_SYMBOL_GPL(pciserial_init_ports);
@@ -2171,22 +2168,22 @@ static struct pci_device_id serial_pci_tbl[] = {
pbn_b0_8_1843200_200 },
{ PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_U530,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_bt_1_115200 },
{ PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM2,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_bt_2_115200 },
{ PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM422,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_bt_4_115200 },
{ PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM232,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_bt_2_115200 },
{ PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_COMM4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_bt_4_115200 },
{ PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_COMM8,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_8_115200 },
{ PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM8,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
@@ -2201,11 +2198,11 @@ static struct pci_device_id serial_pci_tbl[] = {
/*
* VScom SPCOM800, from sl@s.pl
*/
- { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_SPCOM800,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_SPCOM800,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_8_921600 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_1077,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b2_4_921600 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_KEYSPAN,
@@ -2223,27 +2220,27 @@ static struct pci_device_id serial_pci_tbl[] = {
pbn_b2_4_115200 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_CHASE_PCIFAST,
- PCI_SUBDEVICE_ID_CHASE_PCIFAST4, 0, 0,
+ PCI_SUBDEVICE_ID_CHASE_PCIFAST4, 0, 0,
pbn_b2_4_460800 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_CHASE_PCIFAST,
- PCI_SUBDEVICE_ID_CHASE_PCIFAST8, 0, 0,
+ PCI_SUBDEVICE_ID_CHASE_PCIFAST8, 0, 0,
pbn_b2_8_460800 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_CHASE_PCIFAST,
- PCI_SUBDEVICE_ID_CHASE_PCIFAST16, 0, 0,
+ PCI_SUBDEVICE_ID_CHASE_PCIFAST16, 0, 0,
pbn_b2_16_460800 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_CHASE_PCIFAST,
- PCI_SUBDEVICE_ID_CHASE_PCIFAST16FMC, 0, 0,
+ PCI_SUBDEVICE_ID_CHASE_PCIFAST16FMC, 0, 0,
pbn_b2_16_460800 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_CHASE_PCIRAS,
- PCI_SUBDEVICE_ID_CHASE_PCIRAS4, 0, 0,
+ PCI_SUBDEVICE_ID_CHASE_PCIRAS4, 0, 0,
pbn_b2_4_460800 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_CHASE_PCIRAS,
- PCI_SUBDEVICE_ID_CHASE_PCIRAS8, 0, 0,
+ PCI_SUBDEVICE_ID_CHASE_PCIRAS8, 0, 0,
pbn_b2_8_460800 },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_EXSYS,
@@ -2269,10 +2266,12 @@ static struct pci_device_id serial_pci_tbl[] = {
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b1_8_115200 },
{ PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_OXSEMI_16PCI954,
- PCI_VENDOR_ID_SPECIALIX, PCI_SUBDEVICE_ID_SPECIALIX_SPEED4, 0, 0,
+ PCI_VENDOR_ID_SPECIALIX, PCI_SUBDEVICE_ID_SPECIALIX_SPEED4,
+ 0, 0,
pbn_b0_4_921600 },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954,
- PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_QUARTET_SERIAL, 0, 0,
+ PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_QUARTET_SERIAL,
+ 0, 0,
pbn_b0_4_1152000 },
/*
@@ -2312,7 +2311,7 @@ static struct pci_device_id serial_pci_tbl[] = {
* Digitan DS560-558, from jimd@esoft.com
*/
{ PCI_VENDOR_ID_ATT, PCI_DEVICE_ID_ATT_VENUS_MODEM,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b1_1_115200 },
/*
@@ -2320,16 +2319,16 @@ static struct pci_device_id serial_pci_tbl[] = {
* The 400L and 800L have a custom setup quirk.
*/
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_100,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_1_921600 },
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_2_921600 },
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_4_921600 },
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800B,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_4_921600 },
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_100L,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 4fa7927..b82595c 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -380,6 +380,21 @@ config SERIAL_ATMEL_CONSOLE
console is the device which receives all kernel messages and
warnings and which allows logins in single user mode).
+config SERIAL_ATMEL_PDC
+ bool "Support DMA transfers on AT91 / AT32 serial port"
+ depends on SERIAL_ATMEL
+ default y
+ help
+ Say Y here if you wish to use the PDC to do DMA transfers to
+ and from the Atmel AT91 / AT32 serial port. In order to
+ actually use DMA transfers, make sure that the use_dma_tx
+ and use_dma_rx members in the atmel_uart_data struct is set
+ appropriately for each port.
+
+ Note that break and error handling currently doesn't work
+ properly when DMA is enabled. Make sure that ports where
+ this matters don't use DMA.
+
config SERIAL_ATMEL_TTYAT
bool "Install as device ttyATn instead of ttySn"
depends on SERIAL_ATMEL=y
@@ -465,20 +480,24 @@ config SERIAL_DZ
bool "DECstation DZ serial driver"
depends on MACH_DECSTATION && 32BIT
select SERIAL_CORE
- help
- DZ11-family serial controllers for VAXstations, including the
- DC7085, M7814, and M7819.
+ default y
+ ---help---
+ DZ11-family serial controllers for DECstations and VAXstations,
+ including the DC7085, M7814, and M7819.
config SERIAL_DZ_CONSOLE
bool "Support console on DECstation DZ serial driver"
depends on SERIAL_DZ=y
select SERIAL_CORE_CONSOLE
- help
+ default y
+ ---help---
If you say Y here, it will be possible to use a serial port as the
system console (the system console is the device which receives all
kernel messages and warnings and which allows logins in single user
- mode). Note that the firmware uses ttyS0 as the serial console on
- the Maxine and ttyS2 on the others.
+ mode).
+
+ Note that the firmware uses ttyS3 as the serial console on
+ DECstations that use this driver.
If unsure, say Y.
@@ -877,15 +896,15 @@ config SERIAL_SUNHV
systems. Say Y if you want to be able to use this device.
config SERIAL_IP22_ZILOG
- tristate "IP22 Zilog8530 serial support"
- depends on SGI_IP22
+ tristate "SGI Zilog8530 serial support"
+ depends on SGI_HAS_ZILOG
select SERIAL_CORE
help
- This driver supports the Zilog8530 serial ports found on SGI IP22
+ This driver supports the Zilog8530 serial ports found on SGI
systems. Say Y or M if you want to be able to these serial ports.
config SERIAL_IP22_ZILOG_CONSOLE
- bool "Console on IP22 Zilog8530 serial port"
+ bool "Console on SGI Zilog8530 serial port"
depends on SERIAL_IP22_ZILOG=y
select SERIAL_CORE_CONSOLE
@@ -1138,17 +1157,17 @@ config SERIAL_SGI_L1_CONSOLE
say Y. Otherwise, say N.
config SERIAL_MPC52xx
- tristate "Freescale MPC52xx family PSC serial support"
- depends on PPC_MPC52xx
+ tristate "Freescale MPC52xx/MPC512x family PSC serial support"
+ depends on PPC_MPC52xx || PPC_MPC512x
select SERIAL_CORE
help
- This drivers support the MPC52xx PSC serial ports. If you would
- like to use them, you must answer Y or M to this option. Not that
+ This driver supports MPC52xx and MPC512x PSC serial ports. If you would
+ like to use them, you must answer Y or M to this option. Note that
for use as console, it must be included in kernel and not as a
module.
config SERIAL_MPC52xx_CONSOLE
- bool "Console on a Freescale MPC52xx family PSC serial port"
+ bool "Console on a Freescale MPC52xx/MPC512x family PSC serial port"
depends on SERIAL_MPC52xx=y
select SERIAL_CORE_CONSOLE
help
@@ -1156,7 +1175,7 @@ config SERIAL_MPC52xx_CONSOLE
of the Freescale MPC52xx family as a console.
config SERIAL_MPC52xx_CONSOLE_BAUD
- int "Freescale MPC52xx family PSC serial port baud"
+ int "Freescale MPC52xx/MPC512x family PSC serial port baud"
depends on SERIAL_MPC52xx_CONSOLE=y
default "9600"
help
@@ -1318,4 +1337,19 @@ config SERIAL_QE
This driver supports the QE serial ports on Freescale embedded
PowerPC that contain a QUICC Engine.
+config SERIAL_SC26XX
+ tristate "SC2681/SC2692 serial port support"
+ depends on SNI_RM
+ select SERIAL_CORE
+ help
+ This is a driver for the onboard serial ports of
+ older RM400 machines.
+
+config SERIAL_SC26XX_CONSOLE
+ bool "Console on SC2681/SC2692 serial port"
+ depends on SERIAL_SC26XX
+ select SERIAL_CORE_CONSOLE
+ help
+ Support for Console on SC2681/SC2692 serial ports.
+
endmenu
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 2dd41b4..640cfe4 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_SERIAL_M32R_SIO) += m32r_sio.o
obj-$(CONFIG_SERIAL_MPSC) += mpsc.o
obj-$(CONFIG_SERIAL_SB1250_DUART) += sb1250-duart.o
obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o
+obj-$(CONFIG_SERIAL_SC26XX) += sc26xx.o
obj-$(CONFIG_SERIAL_JSM) += jsm/
obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o
obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index 60f5290..fad245b 100644
--- a/drivers/serial/atmel_serial.c
+++ b/drivers/serial/atmel_serial.c
@@ -7,6 +7,8 @@
* Based on drivers/char/serial_sa1100.c, by Deep Blue Solutions Ltd.
* Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
*
+ * DMA support added by Chip Coldwell.
+ *
* 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, or
@@ -33,6 +35,7 @@
#include <linux/sysrq.h>
#include <linux/tty_flip.h>
#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
#include <linux/atmel_pdc.h>
#include <linux/atmel_serial.h>
@@ -46,6 +49,10 @@
#include <asm/arch/gpio.h>
#endif
+#define PDC_BUFFER_SIZE 512
+/* Revisit: We should calculate this based on the actual port settings */
+#define PDC_RX_TIMEOUT (3 * 10) /* 3 bytes */
+
#if defined(CONFIG_SERIAL_ATMEL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
@@ -73,6 +80,7 @@
#define ATMEL_ISR_PASS_LIMIT 256
+/* UART registers. CR is write-only, hence no GET macro */
#define UART_PUT_CR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_CR)
#define UART_GET_MR(port) __raw_readl((port)->membase + ATMEL_US_MR)
#define UART_PUT_MR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_MR)
@@ -86,8 +94,6 @@
#define UART_PUT_BRGR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_BRGR)
#define UART_PUT_RTOR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_RTOR)
-// #define UART_GET_CR(port) __raw_readl((port)->membase + ATMEL_US_CR) // is write-only
-
/* PDC registers */
#define UART_PUT_PTCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_PTCR)
#define UART_GET_PTSR(port) __raw_readl((port)->membase + ATMEL_PDC_PTSR)
@@ -100,12 +106,24 @@
#define UART_PUT_TPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TPR)
#define UART_PUT_TCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TCR)
-//#define UART_PUT_TNPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TNPR)
-//#define UART_PUT_TNCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TNCR)
static int (*atmel_open_hook)(struct uart_port *);
static void (*atmel_close_hook)(struct uart_port *);
+struct atmel_dma_buffer {
+ unsigned char *buf;
+ dma_addr_t dma_addr;
+ unsigned int dma_size;
+ unsigned int ofs;
+};
+
+struct atmel_uart_char {
+ u16 status;
+ u16 ch;
+};
+
+#define ATMEL_SERIAL_RINGSIZE 1024
+
/*
* We wrap our port structure around the generic uart_port.
*/
@@ -114,6 +132,19 @@ struct atmel_uart_port {
struct clk *clk; /* uart clock */
unsigned short suspended; /* is port suspended? */
int break_active; /* break being received */
+
+ short use_dma_rx; /* enable PDC receiver */
+ short pdc_rx_idx; /* current PDC RX buffer */
+ struct atmel_dma_buffer pdc_rx[2]; /* PDC receier */
+
+ short use_dma_tx; /* enable PDC transmitter */
+ struct atmel_dma_buffer pdc_tx; /* PDC transmitter */
+
+ struct tasklet_struct tasklet;
+ unsigned int irq_status;
+ unsigned int irq_status_prev;
+
+ struct circ_buf rx_ring;
};
static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
@@ -122,6 +153,38 @@ static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
static struct console atmel_console;
#endif
+static inline struct atmel_uart_port *
+to_atmel_uart_port(struct uart_port *uart)
+{
+ return container_of(uart, struct atmel_uart_port, uart);
+}
+
+#ifdef CONFIG_SERIAL_ATMEL_PDC
+static bool atmel_use_dma_rx(struct uart_port *port)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+ return atmel_port->use_dma_rx;
+}
+
+static bool atmel_use_dma_tx(struct uart_port *port)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+ return atmel_port->use_dma_tx;
+}
+#else
+static bool atmel_use_dma_rx(struct uart_port *port)
+{
+ return false;
+}
+
+static bool atmel_use_dma_tx(struct uart_port *port)
+{
+ return false;
+}
+#endif
+
/*
* Return TIOCSER_TEMT when transmitter FIFO and Shift register is empty.
*/
@@ -141,8 +204,8 @@ static void atmel_set_mctrl(struct uart_port *port, u_int mctrl)
#ifdef CONFIG_ARCH_AT91RM9200
if (cpu_is_at91rm9200()) {
/*
- * AT91RM9200 Errata #39: RTS0 is not internally connected to PA21.
- * We need to drive the pin manually.
+ * AT91RM9200 Errata #39: RTS0 is not internally connected
+ * to PA21. We need to drive the pin manually.
*/
if (port->mapbase == AT91RM9200_BASE_US0) {
if (mctrl & TIOCM_RTS)
@@ -203,7 +266,12 @@ static u_int atmel_get_mctrl(struct uart_port *port)
*/
static void atmel_stop_tx(struct uart_port *port)
{
- UART_PUT_IDR(port, ATMEL_US_TXRDY);
+ if (atmel_use_dma_tx(port)) {
+ /* disable PDC transmit */
+ UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
+ UART_PUT_IDR(port, ATMEL_US_ENDTX | ATMEL_US_TXBUFE);
+ } else
+ UART_PUT_IDR(port, ATMEL_US_TXRDY);
}
/*
@@ -211,7 +279,17 @@ static void atmel_stop_tx(struct uart_port *port)
*/
static void atmel_start_tx(struct uart_port *port)
{
- UART_PUT_IER(port, ATMEL_US_TXRDY);
+ if (atmel_use_dma_tx(port)) {
+ if (UART_GET_PTSR(port) & ATMEL_PDC_TXTEN)
+ /* The transmitter is already running. Yes, we
+ really need this.*/
+ return;
+
+ UART_PUT_IER(port, ATMEL_US_ENDTX | ATMEL_US_TXBUFE);
+ /* re-enable PDC transmit */
+ UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
+ } else
+ UART_PUT_IER(port, ATMEL_US_TXRDY);
}
/*
@@ -219,7 +297,12 @@ static void atmel_start_tx(struct uart_port *port)
*/
static void atmel_stop_rx(struct uart_port *port)
{
- UART_PUT_IDR(port, ATMEL_US_RXRDY);
+ if (atmel_use_dma_rx(port)) {
+ /* disable PDC receive */
+ UART_PUT_PTCR(port, ATMEL_PDC_RXTDIS);
+ UART_PUT_IDR(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
+ } else
+ UART_PUT_IDR(port, ATMEL_US_RXRDY);
}
/*
@@ -227,7 +310,8 @@ static void atmel_stop_rx(struct uart_port *port)
*/
static void atmel_enable_ms(struct uart_port *port)
{
- UART_PUT_IER(port, ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC | ATMEL_US_CTSIC);
+ UART_PUT_IER(port, ATMEL_US_RIIC | ATMEL_US_DSRIC
+ | ATMEL_US_DCDIC | ATMEL_US_CTSIC);
}
/*
@@ -242,22 +326,63 @@ static void atmel_break_ctl(struct uart_port *port, int break_state)
}
/*
+ * Stores the incoming character in the ring buffer
+ */
+static void
+atmel_buffer_rx_char(struct uart_port *port, unsigned int status,
+ unsigned int ch)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct circ_buf *ring = &atmel_port->rx_ring;
+ struct atmel_uart_char *c;
+
+ if (!CIRC_SPACE(ring->head, ring->tail, ATMEL_SERIAL_RINGSIZE))
+ /* Buffer overflow, ignore char */
+ return;
+
+ c = &((struct atmel_uart_char *)ring->buf)[ring->head];
+ c->status = status;
+ c->ch = ch;
+
+ /* Make sure the character is stored before we update head. */
+ smp_wmb();
+
+ ring->head = (ring->head + 1) & (ATMEL_SERIAL_RINGSIZE - 1);
+}
+
+/*
+ * Deal with parity, framing and overrun errors.
+ */
+static void atmel_pdc_rxerr(struct uart_port *port, unsigned int status)
+{
+ /* clear error */
+ UART_PUT_CR(port, ATMEL_US_RSTSTA);
+
+ if (status & ATMEL_US_RXBRK) {
+ /* ignore side-effect */
+ status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME);
+ port->icount.brk++;
+ }
+ if (status & ATMEL_US_PARE)
+ port->icount.parity++;
+ if (status & ATMEL_US_FRAME)
+ port->icount.frame++;
+ if (status & ATMEL_US_OVRE)
+ port->icount.overrun++;
+}
+
+/*
* Characters received (called from interrupt handler)
*/
static void atmel_rx_chars(struct uart_port *port)
{
- struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
- struct tty_struct *tty = port->info->tty;
- unsigned int status, ch, flg;
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ unsigned int status, ch;
status = UART_GET_CSR(port);
while (status & ATMEL_US_RXRDY) {
ch = UART_GET_CHAR(port);
- port->icount.rx++;
-
- flg = TTY_NORMAL;
-
/*
* note that the error handling code is
* out of the main execution path
@@ -265,15 +390,14 @@ static void atmel_rx_chars(struct uart_port *port)
if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME
| ATMEL_US_OVRE | ATMEL_US_RXBRK)
|| atmel_port->break_active)) {
- UART_PUT_CR(port, ATMEL_US_RSTSTA); /* clear error */
+
+ /* clear error */
+ UART_PUT_CR(port, ATMEL_US_RSTSTA);
+
if (status & ATMEL_US_RXBRK
&& !atmel_port->break_active) {
- status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME); /* ignore side-effect */
- port->icount.brk++;
atmel_port->break_active = 1;
UART_PUT_IER(port, ATMEL_US_RXBRK);
- if (uart_handle_break(port))
- goto ignore_char;
} else {
/*
* This is either the end-of-break
@@ -286,52 +410,30 @@ static void atmel_rx_chars(struct uart_port *port)
status &= ~ATMEL_US_RXBRK;
atmel_port->break_active = 0;
}
- if (status & ATMEL_US_PARE)
- port->icount.parity++;
- if (status & ATMEL_US_FRAME)
- port->icount.frame++;
- if (status & ATMEL_US_OVRE)
- port->icount.overrun++;
-
- status &= port->read_status_mask;
-
- if (status & ATMEL_US_RXBRK)
- flg = TTY_BREAK;
- else if (status & ATMEL_US_PARE)
- flg = TTY_PARITY;
- else if (status & ATMEL_US_FRAME)
- flg = TTY_FRAME;
}
- if (uart_handle_sysrq_char(port, ch))
- goto ignore_char;
-
- uart_insert_char(port, status, ATMEL_US_OVRE, ch, flg);
-
- ignore_char:
+ atmel_buffer_rx_char(port, status, ch);
status = UART_GET_CSR(port);
}
- tty_flip_buffer_push(tty);
+ tasklet_schedule(&atmel_port->tasklet);
}
/*
- * Transmit characters (called from interrupt handler)
+ * Transmit characters (called from tasklet with TXRDY interrupt
+ * disabled)
*/
static void atmel_tx_chars(struct uart_port *port)
{
struct circ_buf *xmit = &port->info->xmit;
- if (port->x_char) {
+ if (port->x_char && UART_GET_CSR(port) & ATMEL_US_TXRDY) {
UART_PUT_CHAR(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
- return;
}
- if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
- atmel_stop_tx(port);
+ if (uart_circ_empty(xmit) || uart_tx_stopped(port))
return;
- }
while (UART_GET_CSR(port) & ATMEL_US_TXRDY) {
UART_PUT_CHAR(port, xmit->buf[xmit->tail]);
@@ -344,8 +446,88 @@ static void atmel_tx_chars(struct uart_port *port)
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
- if (uart_circ_empty(xmit))
- atmel_stop_tx(port);
+ if (!uart_circ_empty(xmit))
+ UART_PUT_IER(port, ATMEL_US_TXRDY);
+}
+
+/*
+ * receive interrupt handler.
+ */
+static void
+atmel_handle_receive(struct uart_port *port, unsigned int pending)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+ if (atmel_use_dma_rx(port)) {
+ /*
+ * PDC receive. Just schedule the tasklet and let it
+ * figure out the details.
+ *
+ * TODO: We're not handling error flags correctly at
+ * the moment.
+ */
+ if (pending & (ATMEL_US_ENDRX | ATMEL_US_TIMEOUT)) {
+ UART_PUT_IDR(port, (ATMEL_US_ENDRX
+ | ATMEL_US_TIMEOUT));
+ tasklet_schedule(&atmel_port->tasklet);
+ }
+
+ if (pending & (ATMEL_US_RXBRK | ATMEL_US_OVRE |
+ ATMEL_US_FRAME | ATMEL_US_PARE))
+ atmel_pdc_rxerr(port, pending);
+ }
+
+ /* Interrupt receive */
+ if (pending & ATMEL_US_RXRDY)
+ atmel_rx_chars(port);
+ else if (pending & ATMEL_US_RXBRK) {
+ /*
+ * End of break detected. If it came along with a
+ * character, atmel_rx_chars will handle it.
+ */
+ UART_PUT_CR(port, ATMEL_US_RSTSTA);
+ UART_PUT_IDR(port, ATMEL_US_RXBRK);
+ atmel_port->break_active = 0;
+ }
+}
+
+/*
+ * transmit interrupt handler. (Transmit is IRQF_NODELAY safe)
+ */
+static void
+atmel_handle_transmit(struct uart_port *port, unsigned int pending)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+ if (atmel_use_dma_tx(port)) {
+ /* PDC transmit */
+ if (pending & (ATMEL_US_ENDTX | ATMEL_US_TXBUFE)) {
+ UART_PUT_IDR(port, ATMEL_US_ENDTX | ATMEL_US_TXBUFE);
+ tasklet_schedule(&atmel_port->tasklet);
+ }
+ } else {
+ /* Interrupt transmit */
+ if (pending & ATMEL_US_TXRDY) {
+ UART_PUT_IDR(port, ATMEL_US_TXRDY);
+ tasklet_schedule(&atmel_port->tasklet);
+ }
+ }
+}
+
+/*
+ * status flags interrupt handler.
+ */
+static void
+atmel_handle_status(struct uart_port *port, unsigned int pending,
+ unsigned int status)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+ if (pending & (ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC
+ | ATMEL_US_CTSIC)) {
+ atmel_port->irq_status = status;
+ tasklet_schedule(&atmel_port->tasklet);
+ }
}
/*
@@ -354,47 +536,255 @@ static void atmel_tx_chars(struct uart_port *port)
static irqreturn_t atmel_interrupt(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
- struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
unsigned int status, pending, pass_counter = 0;
- status = UART_GET_CSR(port);
- pending = status & UART_GET_IMR(port);
- while (pending) {
- /* Interrupt receive */
- if (pending & ATMEL_US_RXRDY)
- atmel_rx_chars(port);
- else if (pending & ATMEL_US_RXBRK) {
+ do {
+ status = UART_GET_CSR(port);
+ pending = status & UART_GET_IMR(port);
+ if (!pending)
+ break;
+
+ atmel_handle_receive(port, pending);
+ atmel_handle_status(port, pending, status);
+ atmel_handle_transmit(port, pending);
+ } while (pass_counter++ < ATMEL_ISR_PASS_LIMIT);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Called from tasklet with ENDTX and TXBUFE interrupts disabled.
+ */
+static void atmel_tx_dma(struct uart_port *port)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct circ_buf *xmit = &port->info->xmit;
+ struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
+ int count;
+
+ xmit->tail += pdc->ofs;
+ xmit->tail &= UART_XMIT_SIZE - 1;
+
+ port->icount.tx += pdc->ofs;
+ pdc->ofs = 0;
+
+ if (!uart_circ_empty(xmit)) {
+ /* more to transmit - setup next transfer */
+
+ /* disable PDC transmit */
+ UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
+ dma_sync_single_for_device(port->dev,
+ pdc->dma_addr,
+ pdc->dma_size,
+ DMA_TO_DEVICE);
+
+ count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
+ pdc->ofs = count;
+
+ UART_PUT_TPR(port, pdc->dma_addr + xmit->tail);
+ UART_PUT_TCR(port, count);
+ /* re-enable PDC transmit and interrupts */
+ UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
+ UART_PUT_IER(port, ATMEL_US_ENDTX | ATMEL_US_TXBUFE);
+ } else {
+ /* nothing left to transmit - disable the transmitter */
+
+ /* disable PDC transmit */
+ UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
+ }
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(port);
+}
+
+static void atmel_rx_from_ring(struct uart_port *port)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct circ_buf *ring = &atmel_port->rx_ring;
+ unsigned int flg;
+ unsigned int status;
+
+ while (ring->head != ring->tail) {
+ struct atmel_uart_char c;
+
+ /* Make sure c is loaded after head. */
+ smp_rmb();
+
+ c = ((struct atmel_uart_char *)ring->buf)[ring->tail];
+
+ ring->tail = (ring->tail + 1) & (ATMEL_SERIAL_RINGSIZE - 1);
+
+ port->icount.rx++;
+ status = c.status;
+ flg = TTY_NORMAL;
+
+ /*
+ * note that the error handling code is
+ * out of the main execution path
+ */
+ if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME
+ | ATMEL_US_OVRE | ATMEL_US_RXBRK))) {
+ if (status & ATMEL_US_RXBRK) {
+ /* ignore side-effect */
+ status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME);
+
+ port->icount.brk++;
+ if (uart_handle_break(port))
+ continue;
+ }
+ if (status & ATMEL_US_PARE)
+ port->icount.parity++;
+ if (status & ATMEL_US_FRAME)
+ port->icount.frame++;
+ if (status & ATMEL_US_OVRE)
+ port->icount.overrun++;
+
+ status &= port->read_status_mask;
+
+ if (status & ATMEL_US_RXBRK)
+ flg = TTY_BREAK;
+ else if (status & ATMEL_US_PARE)
+ flg = TTY_PARITY;
+ else if (status & ATMEL_US_FRAME)
+ flg = TTY_FRAME;
+ }
+
+
+ if (uart_handle_sysrq_char(port, c.ch))
+ continue;
+
+ uart_insert_char(port, status, ATMEL_US_OVRE, c.ch, flg);
+ }
+
+ /*
+ * Drop the lock here since it might end up calling
+ * uart_start(), which takes the lock.
+ */
+ spin_unlock(&port->lock);
+ tty_flip_buffer_push(port->info->tty);
+ spin_lock(&port->lock);
+}
+
+static void atmel_rx_from_dma(struct uart_port *port)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct tty_struct *tty = port->info->tty;
+ struct atmel_dma_buffer *pdc;
+ int rx_idx = atmel_port->pdc_rx_idx;
+ unsigned int head;
+ unsigned int tail;
+ unsigned int count;
+
+ do {
+ /* Reset the UART timeout early so that we don't miss one */
+ UART_PUT_CR(port, ATMEL_US_STTTO);
+
+ pdc = &atmel_port->pdc_rx[rx_idx];
+ head = UART_GET_RPR(port) - pdc->dma_addr;
+ tail = pdc->ofs;
+
+ /* If the PDC has switched buffers, RPR won't contain
+ * any address within the current buffer. Since head
+ * is unsigned, we just need a one-way comparison to
+ * find out.
+ *
+ * In this case, we just need to consume the entire
+ * buffer and resubmit it for DMA. This will clear the
+ * ENDRX bit as well, so that we can safely re-enable
+ * all interrupts below.
+ */
+ head = min(head, pdc->dma_size);
+
+ if (likely(head != tail)) {
+ dma_sync_single_for_cpu(port->dev, pdc->dma_addr,
+ pdc->dma_size, DMA_FROM_DEVICE);
+
/*
- * End of break detected. If it came along
- * with a character, atmel_rx_chars will
- * handle it.
+ * head will only wrap around when we recycle
+ * the DMA buffer, and when that happens, we
+ * explicitly set tail to 0. So head will
+ * always be greater than tail.
*/
- UART_PUT_CR(port, ATMEL_US_RSTSTA);
- UART_PUT_IDR(port, ATMEL_US_RXBRK);
- atmel_port->break_active = 0;
+ count = head - tail;
+
+ tty_insert_flip_string(tty, pdc->buf + pdc->ofs, count);
+
+ dma_sync_single_for_device(port->dev, pdc->dma_addr,
+ pdc->dma_size, DMA_FROM_DEVICE);
+
+ port->icount.rx += count;
+ pdc->ofs = head;
}
- // TODO: All reads to CSR will clear these interrupts!
- if (pending & ATMEL_US_RIIC) port->icount.rng++;
- if (pending & ATMEL_US_DSRIC) port->icount.dsr++;
- if (pending & ATMEL_US_DCDIC)
+ /*
+ * If the current buffer is full, we need to check if
+ * the next one contains any additional data.
+ */
+ if (head >= pdc->dma_size) {
+ pdc->ofs = 0;
+ UART_PUT_RNPR(port, pdc->dma_addr);
+ UART_PUT_RNCR(port, pdc->dma_size);
+
+ rx_idx = !rx_idx;
+ atmel_port->pdc_rx_idx = rx_idx;
+ }
+ } while (head >= pdc->dma_size);
+
+ /*
+ * Drop the lock here since it might end up calling
+ * uart_start(), which takes the lock.
+ */
+ spin_unlock(&port->lock);
+ tty_flip_buffer_push(tty);
+ spin_lock(&port->lock);
+
+ UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
+}
+
+/*
+ * tasklet handling tty stuff outside the interrupt handler.
+ */
+static void atmel_tasklet_func(unsigned long data)
+{
+ struct uart_port *port = (struct uart_port *)data;
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ unsigned int status;
+ unsigned int status_change;
+
+ /* The interrupt handler does not take the lock */
+ spin_lock(&port->lock);
+
+ if (atmel_use_dma_tx(port))
+ atmel_tx_dma(port);
+ else
+ atmel_tx_chars(port);
+
+ status = atmel_port->irq_status;
+ status_change = status ^ atmel_port->irq_status_prev;
+
+ if (status_change & (ATMEL_US_RI | ATMEL_US_DSR
+ | ATMEL_US_DCD | ATMEL_US_CTS)) {
+ /* TODO: All reads to CSR will clear these interrupts! */
+ if (status_change & ATMEL_US_RI)
+ port->icount.rng++;
+ if (status_change & ATMEL_US_DSR)
+ port->icount.dsr++;
+ if (status_change & ATMEL_US_DCD)
uart_handle_dcd_change(port, !(status & ATMEL_US_DCD));
- if (pending & ATMEL_US_CTSIC)
+ if (status_change & ATMEL_US_CTS)
uart_handle_cts_change(port, !(status & ATMEL_US_CTS));
- if (pending & (ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC | ATMEL_US_CTSIC))
- wake_up_interruptible(&port->info->delta_msr_wait);
- /* Interrupt transmit */
- if (pending & ATMEL_US_TXRDY)
- atmel_tx_chars(port);
+ wake_up_interruptible(&port->info->delta_msr_wait);
- if (pass_counter++ > ATMEL_ISR_PASS_LIMIT)
- break;
-
- status = UART_GET_CSR(port);
- pending = status & UART_GET_IMR(port);
+ atmel_port->irq_status_prev = status;
}
- return IRQ_HANDLED;
+
+ if (atmel_use_dma_rx(port))
+ atmel_rx_from_dma(port);
+ else
+ atmel_rx_from_ring(port);
+
+ spin_unlock(&port->lock);
}
/*
@@ -402,6 +792,8 @@ static irqreturn_t atmel_interrupt(int irq, void *dev_id)
*/
static int atmel_startup(struct uart_port *port)
{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct tty_struct *tty = port->info->tty;
int retval;
/*
@@ -414,13 +806,64 @@ static int atmel_startup(struct uart_port *port)
/*
* Allocate the IRQ
*/
- retval = request_irq(port->irq, atmel_interrupt, IRQF_SHARED, "atmel_serial", port);
+ retval = request_irq(port->irq, atmel_interrupt, IRQF_SHARED,
+ tty ? tty->name : "atmel_serial", port);
if (retval) {
printk("atmel_serial: atmel_startup - Can't get irq\n");
return retval;
}
/*
+ * Initialize DMA (if necessary)
+ */
+ if (atmel_use_dma_rx(port)) {
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i];
+
+ pdc->buf = kmalloc(PDC_BUFFER_SIZE, GFP_KERNEL);
+ if (pdc->buf == NULL) {
+ if (i != 0) {
+ dma_unmap_single(port->dev,
+ atmel_port->pdc_rx[0].dma_addr,
+ PDC_BUFFER_SIZE,
+ DMA_FROM_DEVICE);
+ kfree(atmel_port->pdc_rx[0].buf);
+ }
+ free_irq(port->irq, port);
+ return -ENOMEM;
+ }
+ pdc->dma_addr = dma_map_single(port->dev,
+ pdc->buf,
+ PDC_BUFFER_SIZE,
+ DMA_FROM_DEVICE);
+ pdc->dma_size = PDC_BUFFER_SIZE;
+ pdc->ofs = 0;
+ }
+
+ atmel_port->pdc_rx_idx = 0;
+
+ UART_PUT_RPR(port, atmel_port->pdc_rx[0].dma_addr);
+ UART_PUT_RCR(port, PDC_BUFFER_SIZE);
+
+ UART_PUT_RNPR(port, atmel_port->pdc_rx[1].dma_addr);
+ UART_PUT_RNCR(port, PDC_BUFFER_SIZE);
+ }
+ if (atmel_use_dma_tx(port)) {
+ struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
+ struct circ_buf *xmit = &port->info->xmit;
+
+ pdc->buf = xmit->buf;
+ pdc->dma_addr = dma_map_single(port->dev,
+ pdc->buf,
+ UART_XMIT_SIZE,
+ DMA_TO_DEVICE);
+ pdc->dma_size = UART_XMIT_SIZE;
+ pdc->ofs = 0;
+ }
+
+ /*
* If there is a specific "open" function (to register
* control line interrupts)
*/
@@ -436,9 +879,21 @@ static int atmel_startup(struct uart_port *port)
* Finally, enable the serial port
*/
UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
- UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN); /* enable xmit & rcvr */
+ /* enable xmit & rcvr */
+ UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
- UART_PUT_IER(port, ATMEL_US_RXRDY); /* enable receive only */
+ if (atmel_use_dma_rx(port)) {
+ /* set UART timeout */
+ UART_PUT_RTOR(port, PDC_RX_TIMEOUT);
+ UART_PUT_CR(port, ATMEL_US_STTTO);
+
+ UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
+ /* enable PDC controller */
+ UART_PUT_PTCR(port, ATMEL_PDC_RXTEN);
+ } else {
+ /* enable receive only */
+ UART_PUT_IER(port, ATMEL_US_RXRDY);
+ }
return 0;
}
@@ -448,6 +903,38 @@ static int atmel_startup(struct uart_port *port)
*/
static void atmel_shutdown(struct uart_port *port)
{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ /*
+ * Ensure everything is stopped.
+ */
+ atmel_stop_rx(port);
+ atmel_stop_tx(port);
+
+ /*
+ * Shut-down the DMA.
+ */
+ if (atmel_use_dma_rx(port)) {
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i];
+
+ dma_unmap_single(port->dev,
+ pdc->dma_addr,
+ pdc->dma_size,
+ DMA_FROM_DEVICE);
+ kfree(pdc->buf);
+ }
+ }
+ if (atmel_use_dma_tx(port)) {
+ struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
+
+ dma_unmap_single(port->dev,
+ pdc->dma_addr,
+ pdc->dma_size,
+ DMA_TO_DEVICE);
+ }
+
/*
* Disable all interrupts, port and break condition.
*/
@@ -470,45 +957,48 @@ static void atmel_shutdown(struct uart_port *port)
/*
* Power / Clock management.
*/
-static void atmel_serial_pm(struct uart_port *port, unsigned int state, unsigned int oldstate)
+static void atmel_serial_pm(struct uart_port *port, unsigned int state,
+ unsigned int oldstate)
{
- struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
switch (state) {
- case 0:
- /*
- * Enable the peripheral clock for this serial port.
- * This is called on uart_open() or a resume event.
- */
- clk_enable(atmel_port->clk);
- break;
- case 3:
- /*
- * Disable the peripheral clock for this serial port.
- * This is called on uart_close() or a suspend event.
- */
- clk_disable(atmel_port->clk);
- break;
- default:
- printk(KERN_ERR "atmel_serial: unknown pm %d\n", state);
+ case 0:
+ /*
+ * Enable the peripheral clock for this serial port.
+ * This is called on uart_open() or a resume event.
+ */
+ clk_enable(atmel_port->clk);
+ break;
+ case 3:
+ /*
+ * Disable the peripheral clock for this serial port.
+ * This is called on uart_close() or a suspend event.
+ */
+ clk_disable(atmel_port->clk);
+ break;
+ default:
+ printk(KERN_ERR "atmel_serial: unknown pm %d\n", state);
}
}
/*
* Change the port parameters
*/
-static void atmel_set_termios(struct uart_port *port, struct ktermios * termios, struct ktermios * old)
+static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
+ struct ktermios *old)
{
unsigned long flags;
unsigned int mode, imr, quot, baud;
/* Get current mode register */
- mode = UART_GET_MR(port) & ~(ATMEL_US_USCLKS | ATMEL_US_CHRL | ATMEL_US_NBSTOP | ATMEL_US_PAR);
+ mode = UART_GET_MR(port) & ~(ATMEL_US_USCLKS | ATMEL_US_CHRL
+ | ATMEL_US_NBSTOP | ATMEL_US_PAR);
- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
+ baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
quot = uart_get_divisor(port, baud);
- if (quot > 65535) { /* BRGR is 16-bit, so switch to slower clock */
+ if (quot > 65535) { /* BRGR is 16-bit, so switch to slower clock */
quot /= 8;
mode |= ATMEL_US_USCLKS_MCK_DIV8;
}
@@ -535,18 +1025,17 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios * termios,
/* parity */
if (termios->c_cflag & PARENB) {
- if (termios->c_cflag & CMSPAR) { /* Mark or Space parity */
+ /* Mark or Space parity */
+ if (termios->c_cflag & CMSPAR) {
if (termios->c_cflag & PARODD)
mode |= ATMEL_US_PAR_MARK;
else
mode |= ATMEL_US_PAR_SPACE;
- }
- else if (termios->c_cflag & PARODD)
+ } else if (termios->c_cflag & PARODD)
mode |= ATMEL_US_PAR_ODD;
else
mode |= ATMEL_US_PAR_EVEN;
- }
- else
+ } else
mode |= ATMEL_US_PAR_NONE;
spin_lock_irqsave(&port->lock, flags);
@@ -557,6 +1046,10 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios * termios,
if (termios->c_iflag & (BRKINT | PARMRK))
port->read_status_mask |= ATMEL_US_RXBRK;
+ if (atmel_use_dma_rx(port))
+ /* need to enable error interrupts */
+ UART_PUT_IER(port, port->read_status_mask);
+
/*
* Characters to ignore
*/
@@ -572,16 +1065,16 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios * termios,
if (termios->c_iflag & IGNPAR)
port->ignore_status_mask |= ATMEL_US_OVRE;
}
-
- // TODO: Ignore all characters if CREAD is set.
+ /* TODO: Ignore all characters if CREAD is set.*/
/* update the per-port timeout */
uart_update_timeout(port, termios->c_cflag, baud);
- /* disable interrupts and drain transmitter */
- imr = UART_GET_IMR(port); /* get interrupt mask */
- UART_PUT_IDR(port, -1); /* disable all interrupts */
- while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY)) { barrier(); }
+ /* save/disable interrupts and drain transmitter */
+ imr = UART_GET_IMR(port);
+ UART_PUT_IDR(port, -1);
+ while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY))
+ cpu_relax();
/* disable receiver and transmitter */
UART_PUT_CR(port, ATMEL_US_TXDIS | ATMEL_US_RXDIS);
@@ -707,7 +1200,8 @@ static struct uart_ops atmel_pops = {
/*
* Configure the port from the platform device resource info.
*/
-static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port, struct platform_device *pdev)
+static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port,
+ struct platform_device *pdev)
{
struct uart_port *port = &atmel_port->uart;
struct atmel_uart_data *data = pdev->dev.platform_data;
@@ -722,6 +1216,11 @@ static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port, struct
port->mapbase = pdev->resource[0].start;
port->irq = pdev->resource[1].start;
+ tasklet_init(&atmel_port->tasklet, atmel_tasklet_func,
+ (unsigned long)port);
+
+ memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));
+
if (data->regs)
/* Already mapped by setup code */
port->membase = data->regs;
@@ -730,11 +1229,17 @@ static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port, struct
port->membase = NULL;
}
- if (!atmel_port->clk) { /* for console, the clock could already be configured */
+ /* for console, the clock could already be configured */
+ if (!atmel_port->clk) {
atmel_port->clk = clk_get(&pdev->dev, "usart");
clk_enable(atmel_port->clk);
port->uartclk = clk_get_rate(atmel_port->clk);
}
+
+ atmel_port->use_dma_rx = data->use_dma_rx;
+ atmel_port->use_dma_tx = data->use_dma_tx;
+ if (atmel_use_dma_tx(port))
+ port->fifosize = PDC_BUFFER_SIZE;
}
/*
@@ -754,12 +1259,11 @@ void __init atmel_register_uart_fns(struct atmel_port_fns *fns)
atmel_pops.set_wake = fns->set_wake;
}
-
#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
static void atmel_console_putchar(struct uart_port *port, int ch)
{
while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY))
- barrier();
+ cpu_relax();
UART_PUT_CHAR(port, ch);
}
@@ -772,38 +1276,40 @@ static void atmel_console_write(struct console *co, const char *s, u_int count)
unsigned int status, imr;
/*
- * First, save IMR and then disable interrupts
+ * First, save IMR and then disable interrupts
*/
- imr = UART_GET_IMR(port); /* get interrupt mask */
+ imr = UART_GET_IMR(port);
UART_PUT_IDR(port, ATMEL_US_RXRDY | ATMEL_US_TXRDY);
uart_console_write(port, s, count, atmel_console_putchar);
/*
- * Finally, wait for transmitter to become empty
- * and restore IMR
+ * Finally, wait for transmitter to become empty
+ * and restore IMR
*/
do {
status = UART_GET_CSR(port);
} while (!(status & ATMEL_US_TXRDY));
- UART_PUT_IER(port, imr); /* set interrupts back the way they were */
+ /* set interrupts back the way they were */
+ UART_PUT_IER(port, imr);
}
/*
- * If the port was already initialised (eg, by a boot loader), try to determine
- * the current setup.
+ * If the port was already initialised (eg, by a boot loader),
+ * try to determine the current setup.
*/
-static void __init atmel_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
+static void __init atmel_console_get_options(struct uart_port *port, int *baud,
+ int *parity, int *bits)
{
unsigned int mr, quot;
-// TODO: CR is a write-only register
-// unsigned int cr;
-//
-// cr = UART_GET_CR(port) & (ATMEL_US_RXEN | ATMEL_US_TXEN);
-// if (cr == (ATMEL_US_RXEN | ATMEL_US_TXEN)) {
-// /* ok, the port was enabled */
-// }
+ /*
+ * If the baud rate generator isn't running, the port wasn't
+ * initialized by the boot loader.
+ */
+ quot = UART_GET_BRGR(port);
+ if (!quot)
+ return;
mr = UART_GET_MR(port) & ATMEL_US_CHRL;
if (mr == ATMEL_US_CHRL_8)
@@ -823,7 +1329,6 @@ static void __init atmel_console_get_options(struct uart_port *port, int *baud,
* lower than one of those, as it would make us fall through
* to a much lower baud rate than we really want.
*/
- quot = UART_GET_BRGR(port);
*baud = port->uartclk / (16 * (quot - 1));
}
@@ -835,10 +1340,12 @@ static int __init atmel_console_setup(struct console *co, char *options)
int parity = 'n';
int flow = 'n';
- if (port->membase == 0) /* Port not initialized yet - delay setup */
+ if (port->membase == NULL) {
+ /* Port not initialized yet - delay setup */
return -ENODEV;
+ }
- UART_PUT_IDR(port, -1); /* disable interrupts */
+ UART_PUT_IDR(port, -1);
UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
@@ -870,13 +1377,16 @@ static struct console atmel_console = {
static int __init atmel_console_init(void)
{
if (atmel_default_console_device) {
- add_preferred_console(ATMEL_DEVICENAME, atmel_default_console_device->id, NULL);
- atmel_init_port(&(atmel_ports[atmel_default_console_device->id]), atmel_default_console_device);
+ add_preferred_console(ATMEL_DEVICENAME,
+ atmel_default_console_device->id, NULL);
+ atmel_init_port(&atmel_ports[atmel_default_console_device->id],
+ atmel_default_console_device);
register_console(&atmel_console);
}
return 0;
}
+
console_initcall(atmel_console_init);
/*
@@ -884,34 +1394,48 @@ console_initcall(atmel_console_init);
*/
static int __init atmel_late_console_init(void)
{
- if (atmel_default_console_device && !(atmel_console.flags & CON_ENABLED))
+ if (atmel_default_console_device
+ && !(atmel_console.flags & CON_ENABLED))
register_console(&atmel_console);
return 0;
}
+
core_initcall(atmel_late_console_init);
+static inline bool atmel_is_console_port(struct uart_port *port)
+{
+ return port->cons && port->cons->index == port->line;
+}
+
#else
#define ATMEL_CONSOLE_DEVICE NULL
+
+static inline bool atmel_is_console_port(struct uart_port *port)
+{
+ return false;
+}
#endif
static struct uart_driver atmel_uart = {
- .owner = THIS_MODULE,
- .driver_name = "atmel_serial",
- .dev_name = ATMEL_DEVICENAME,
- .major = SERIAL_ATMEL_MAJOR,
- .minor = MINOR_START,
- .nr = ATMEL_MAX_UART,
- .cons = ATMEL_CONSOLE_DEVICE,
+ .owner = THIS_MODULE,
+ .driver_name = "atmel_serial",
+ .dev_name = ATMEL_DEVICENAME,
+ .major = SERIAL_ATMEL_MAJOR,
+ .minor = MINOR_START,
+ .nr = ATMEL_MAX_UART,
+ .cons = ATMEL_CONSOLE_DEVICE,
};
#ifdef CONFIG_PM
-static int atmel_serial_suspend(struct platform_device *pdev, pm_message_t state)
+static int atmel_serial_suspend(struct platform_device *pdev,
+ pm_message_t state)
{
struct uart_port *port = platform_get_drvdata(pdev);
- struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- if (device_may_wakeup(&pdev->dev) && !at91_suspend_entering_slow_clock())
+ if (device_may_wakeup(&pdev->dev)
+ && !at91_suspend_entering_slow_clock())
enable_irq_wake(port->irq);
else {
uart_suspend_port(&atmel_uart, port);
@@ -924,13 +1448,12 @@ static int atmel_serial_suspend(struct platform_device *pdev, pm_message_t state
static int atmel_serial_resume(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
- struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
if (atmel_port->suspended) {
uart_resume_port(&atmel_uart, port);
atmel_port->suspended = 0;
- }
- else
+ } else
disable_irq_wake(port->irq);
return 0;
@@ -943,15 +1466,40 @@ static int atmel_serial_resume(struct platform_device *pdev)
static int __devinit atmel_serial_probe(struct platform_device *pdev)
{
struct atmel_uart_port *port;
+ void *data;
int ret;
+ BUILD_BUG_ON(!is_power_of_2(ATMEL_SERIAL_RINGSIZE));
+
port = &atmel_ports[pdev->id];
atmel_init_port(port, pdev);
+ if (!atmel_use_dma_rx(&port->uart)) {
+ ret = -ENOMEM;
+ data = kmalloc(sizeof(struct atmel_uart_char)
+ * ATMEL_SERIAL_RINGSIZE, GFP_KERNEL);
+ if (!data)
+ goto err_alloc_ring;
+ port->rx_ring.buf = data;
+ }
+
ret = uart_add_one_port(&atmel_uart, &port->uart);
- if (!ret) {
- device_init_wakeup(&pdev->dev, 1);
- platform_set_drvdata(pdev, port);
+ if (ret)
+ goto err_add_port;
+
+ device_init_wakeup(&pdev->dev, 1);
+ platform_set_drvdata(pdev, port);
+
+ return 0;
+
+err_add_port:
+ kfree(port->rx_ring.buf);
+ port->rx_ring.buf = NULL;
+err_alloc_ring:
+ if (!atmel_is_console_port(&port->uart)) {
+ clk_disable(port->clk);
+ clk_put(port->clk);
+ port->clk = NULL;
}
return ret;
@@ -960,19 +1508,21 @@ static int __devinit atmel_serial_probe(struct platform_device *pdev)
static int __devexit atmel_serial_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
- struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
int ret = 0;
- clk_disable(atmel_port->clk);
- clk_put(atmel_port->clk);
-
device_init_wakeup(&pdev->dev, 0);
platform_set_drvdata(pdev, NULL);
- if (port) {
- ret = uart_remove_one_port(&atmel_uart, port);
- kfree(port);
- }
+ ret = uart_remove_one_port(&atmel_uart, port);
+
+ tasklet_kill(&atmel_port->tasklet);
+ kfree(atmel_port->rx_ring.buf);
+
+ /* "port" is allocated statically, so we shouldn't free it */
+
+ clk_disable(atmel_port->clk);
+ clk_put(atmel_port->clk);
return ret;
}
diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index b5e4478..236af9d 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -380,7 +380,7 @@ static void cpm_uart_int_rx(struct uart_port *port)
static irqreturn_t cpm_uart_int(int irq, void *data)
{
u8 events;
- struct uart_port *port = (struct uart_port *)data;
+ struct uart_port *port = data;
struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
smc_t __iomem *smcp = pinfo->smcp;
scc_t __iomem *sccp = pinfo->sccp;
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index a4e23cf..383c4e6 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -68,11 +68,6 @@ static char *serial_version = "$Revision: 1.25 $";
struct tty_driver *serial_driver;
-/* serial subtype definitions */
-#ifndef SERIAL_TYPE_NORMAL
-#define SERIAL_TYPE_NORMAL 1
-#endif
-
/* number of characters left in xmit buffer before we ask for more */
#define WAKEUP_CHARS 256
diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c
index d31721f..116211f 100644
--- a/drivers/serial/dz.c
+++ b/drivers/serial/dz.c
@@ -6,7 +6,7 @@
*
* Email: olivier.lebaillif@ifrsys.com
*
- * Copyright (C) 2004, 2006 Maciej W. Rozycki
+ * Copyright (C) 2004, 2006, 2007 Maciej W. Rozycki
*
* [31-AUG-98] triemer
* Changed IRQ to use Harald's dec internals interrupts.h
@@ -32,38 +32,63 @@
#define SUPPORT_SYSRQ
#endif
+#include <linux/bitops.h>
+#include <linux/compiler.h>
+#include <linux/console.h>
#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
+#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/console.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/module.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
#include <linux/sysrq.h>
#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial.h>
+#include <asm/atomic.h>
#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
#include <asm/dec/interrupts.h>
#include <asm/dec/kn01.h>
#include <asm/dec/kn02.h>
#include <asm/dec/machtype.h>
#include <asm/dec/prom.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
+#include <asm/dec/system.h>
#include "dz.h"
-static char *dz_name = "DECstation DZ serial driver version ";
-static char *dz_version = "1.03";
+
+MODULE_DESCRIPTION("DECstation DZ serial driver");
+MODULE_LICENSE("GPL");
+
+
+static char dz_name[] __initdata = "DECstation DZ serial driver version ";
+static char dz_version[] __initdata = "1.04";
struct dz_port {
+ struct dz_mux *mux;
struct uart_port port;
unsigned int cflag;
};
-static struct dz_port dz_ports[DZ_NB_PORT];
+struct dz_mux {
+ struct dz_port dport[DZ_NB_PORT];
+ atomic_t map_guard;
+ atomic_t irq_guard;
+ int initialised;
+};
+
+static struct dz_mux dz_mux;
+
+static inline struct dz_port *to_dport(struct uart_port *uport)
+{
+ return container_of(uport, struct dz_port, port);
+}
/*
* ------------------------------------------------------------
@@ -74,21 +99,18 @@ static struct dz_port dz_ports[DZ_NB_PORT];
* ------------------------------------------------------------
*/
-static inline unsigned short dz_in(struct dz_port *dport, unsigned offset)
+static u16 dz_in(struct dz_port *dport, unsigned offset)
{
- volatile unsigned short *addr =
- (volatile unsigned short *) (dport->port.membase + offset);
+ void __iomem *addr = dport->port.membase + offset;
- return *addr;
+ return readw(addr);
}
-static inline void dz_out(struct dz_port *dport, unsigned offset,
- unsigned short value)
+static void dz_out(struct dz_port *dport, unsigned offset, u16 value)
{
- volatile unsigned short *addr =
- (volatile unsigned short *) (dport->port.membase + offset);
+ void __iomem *addr = dport->port.membase + offset;
- *addr = value;
+ writew(value, addr);
}
/*
@@ -103,42 +125,33 @@ static inline void dz_out(struct dz_port *dport, unsigned offset,
static void dz_stop_tx(struct uart_port *uport)
{
- struct dz_port *dport = (struct dz_port *)uport;
- unsigned short tmp, mask = 1 << dport->port.line;
- unsigned long flags;
+ struct dz_port *dport = to_dport(uport);
+ u16 tmp, mask = 1 << dport->port.line;
- spin_lock_irqsave(&dport->port.lock, flags);
tmp = dz_in(dport, DZ_TCR); /* read the TX flag */
tmp &= ~mask; /* clear the TX flag */
dz_out(dport, DZ_TCR, tmp);
- spin_unlock_irqrestore(&dport->port.lock, flags);
}
static void dz_start_tx(struct uart_port *uport)
{
- struct dz_port *dport = (struct dz_port *)uport;
- unsigned short tmp, mask = 1 << dport->port.line;
- unsigned long flags;
+ struct dz_port *dport = to_dport(uport);
+ u16 tmp, mask = 1 << dport->port.line;
- spin_lock_irqsave(&dport->port.lock, flags);
tmp = dz_in(dport, DZ_TCR); /* read the TX flag */
tmp |= mask; /* set the TX flag */
dz_out(dport, DZ_TCR, tmp);
- spin_unlock_irqrestore(&dport->port.lock, flags);
}
static void dz_stop_rx(struct uart_port *uport)
{
- struct dz_port *dport = (struct dz_port *)uport;
- unsigned long flags;
+ struct dz_port *dport = to_dport(uport);
- spin_lock_irqsave(&dport->port.lock, flags);
- dport->cflag &= ~DZ_CREAD;
- dz_out(dport, DZ_LPR, dport->cflag | dport->port.line);
- spin_unlock_irqrestore(&dport->port.lock, flags);
+ dport->cflag &= ~DZ_RXENAB;
+ dz_out(dport, DZ_LPR, dport->cflag);
}
-static void dz_enable_ms(struct uart_port *port)
+static void dz_enable_ms(struct uart_port *uport)
{
/* nothing to do */
}
@@ -170,73 +183,73 @@ static void dz_enable_ms(struct uart_port *port)
* This routine deals with inputs from any lines.
* ------------------------------------------------------------
*/
-static inline void dz_receive_chars(struct dz_port *dport_in)
+static inline void dz_receive_chars(struct dz_mux *mux)
{
- struct dz_port *dport;
+ struct uart_port *uport;
+ struct dz_port *dport = &mux->dport[0];
struct tty_struct *tty = NULL;
struct uart_icount *icount;
int lines_rx[DZ_NB_PORT] = { [0 ... DZ_NB_PORT - 1] = 0 };
- unsigned short status;
unsigned char ch, flag;
+ u16 status;
int i;
- while ((status = dz_in(dport_in, DZ_RBUF)) & DZ_DVAL) {
- dport = &dz_ports[LINE(status)];
- tty = dport->port.info->tty; /* point to the proper dev */
+ while ((status = dz_in(dport, DZ_RBUF)) & DZ_DVAL) {
+ dport = &mux->dport[LINE(status)];
+ uport = &dport->port;
+ tty = uport->info->tty; /* point to the proper dev */
ch = UCHAR(status); /* grab the char */
+ flag = TTY_NORMAL;
- icount = &dport->port.icount;
+ icount = &uport->icount;
icount->rx++;
- flag = TTY_NORMAL;
- if (status & DZ_FERR) { /* frame error */
+ if (unlikely(status & (DZ_OERR | DZ_FERR | DZ_PERR))) {
+
/*
- * There is no separate BREAK status bit, so
- * treat framing errors as BREAKs for Magic SysRq
- * and SAK; normally, otherwise.
+ * There is no separate BREAK status bit, so treat
+ * null characters with framing errors as BREAKs;
+ * normally, otherwise. For this move the Framing
+ * Error bit to a simulated BREAK bit.
*/
- if (uart_handle_break(&dport->port))
- continue;
- if (dport->port.flags & UPF_SAK)
+ if (!ch) {
+ status |= (status & DZ_FERR) >>
+ (ffs(DZ_FERR) - ffs(DZ_BREAK));
+ status &= ~DZ_FERR;
+ }
+
+ /* Handle SysRq/SAK & keep track of the statistics. */
+ if (status & DZ_BREAK) {
+ icount->brk++;
+ if (uart_handle_break(uport))
+ continue;
+ } else if (status & DZ_FERR)
+ icount->frame++;
+ else if (status & DZ_PERR)
+ icount->parity++;
+ if (status & DZ_OERR)
+ icount->overrun++;
+
+ status &= uport->read_status_mask;
+ if (status & DZ_BREAK)
flag = TTY_BREAK;
- else
+ else if (status & DZ_FERR)
flag = TTY_FRAME;
- } else if (status & DZ_OERR) /* overrun error */
- flag = TTY_OVERRUN;
- else if (status & DZ_PERR) /* parity error */
- flag = TTY_PARITY;
-
- /* keep track of the statistics */
- switch (flag) {
- case TTY_FRAME:
- icount->frame++;
- break;
- case TTY_PARITY:
- icount->parity++;
- break;
- case TTY_OVERRUN:
- icount->overrun++;
- break;
- case TTY_BREAK:
- icount->brk++;
- break;
- default:
- break;
+ else if (status & DZ_PERR)
+ flag = TTY_PARITY;
+
}
- if (uart_handle_sysrq_char(&dport->port, ch))
+ if (uart_handle_sysrq_char(uport, ch))
continue;
- if ((status & dport->port.ignore_status_mask) == 0) {
- uart_insert_char(&dport->port,
- status, DZ_OERR, ch, flag);
- lines_rx[LINE(status)] = 1;
- }
+ uart_insert_char(uport, status, DZ_OERR, ch, flag);
+ lines_rx[LINE(status)] = 1;
}
for (i = 0; i < DZ_NB_PORT; i++)
if (lines_rx[i])
- tty_flip_buffer_push(dz_ports[i].port.info->tty);
+ tty_flip_buffer_push(mux->dport[i].port.info->tty);
}
/*
@@ -246,15 +259,15 @@ static inline void dz_receive_chars(struct dz_port *dport_in)
* This routine deals with outputs to any lines.
* ------------------------------------------------------------
*/
-static inline void dz_transmit_chars(struct dz_port *dport_in)
+static inline void dz_transmit_chars(struct dz_mux *mux)
{
- struct dz_port *dport;
+ struct dz_port *dport = &mux->dport[0];
struct circ_buf *xmit;
- unsigned short status;
unsigned char tmp;
+ u16 status;
- status = dz_in(dport_in, DZ_CSR);
- dport = &dz_ports[LINE(status)];
+ status = dz_in(dport, DZ_CSR);
+ dport = &mux->dport[LINE(status)];
xmit = &dport->port.info->xmit;
if (dport->port.x_char) { /* XON/XOFF chars */
@@ -265,7 +278,9 @@ static inline void dz_transmit_chars(struct dz_port *dport_in)
}
/* If nothing to do or stopped or hardware stopped. */
if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) {
+ spin_lock(&dport->port.lock);
dz_stop_tx(&dport->port);
+ spin_unlock(&dport->port.lock);
return;
}
@@ -282,8 +297,11 @@ static inline void dz_transmit_chars(struct dz_port *dport_in)
uart_write_wakeup(&dport->port);
/* Are we are done. */
- if (uart_circ_empty(xmit))
+ if (uart_circ_empty(xmit)) {
+ spin_lock(&dport->port.lock);
dz_stop_tx(&dport->port);
+ spin_unlock(&dport->port.lock);
+ }
}
/*
@@ -301,7 +319,7 @@ static inline void check_modem_status(struct dz_port *dport)
* 1. No status change interrupt; use a timer.
* 2. Handle the 3100/5000 as appropriate. --macro
*/
- unsigned short status;
+ u16 status;
/* If not the modem line just return. */
if (dport->port.line != DZ_MODEM)
@@ -322,19 +340,20 @@ static inline void check_modem_status(struct dz_port *dport)
* It deals with the multiple ports.
* ------------------------------------------------------------
*/
-static irqreturn_t dz_interrupt(int irq, void *dev)
+static irqreturn_t dz_interrupt(int irq, void *dev_id)
{
- struct dz_port *dport = (struct dz_port *)dev;
- unsigned short status;
+ struct dz_mux *mux = dev_id;
+ struct dz_port *dport = &mux->dport[0];
+ u16 status;
/* get the reason why we just got an irq */
status = dz_in(dport, DZ_CSR);
if ((status & (DZ_RDONE | DZ_RIE)) == (DZ_RDONE | DZ_RIE))
- dz_receive_chars(dport);
+ dz_receive_chars(mux);
if ((status & (DZ_TRDY | DZ_TIE)) == (DZ_TRDY | DZ_TIE))
- dz_transmit_chars(dport);
+ dz_transmit_chars(mux);
return IRQ_HANDLED;
}
@@ -350,7 +369,7 @@ static unsigned int dz_get_mctrl(struct uart_port *uport)
/*
* FIXME: Handle the 3100/5000 as appropriate. --macro
*/
- struct dz_port *dport = (struct dz_port *)uport;
+ struct dz_port *dport = to_dport(uport);
unsigned int mctrl = TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
if (dport->port.line == DZ_MODEM) {
@@ -366,8 +385,8 @@ static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl)
/*
* FIXME: Handle the 3100/5000 as appropriate. --macro
*/
- struct dz_port *dport = (struct dz_port *)uport;
- unsigned short tmp;
+ struct dz_port *dport = to_dport(uport);
+ u16 tmp;
if (dport->port.line == DZ_MODEM) {
tmp = dz_in(dport, DZ_TCR);
@@ -388,15 +407,30 @@ static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl)
*/
static int dz_startup(struct uart_port *uport)
{
- struct dz_port *dport = (struct dz_port *)uport;
+ struct dz_port *dport = to_dport(uport);
+ struct dz_mux *mux = dport->mux;
unsigned long flags;
- unsigned short tmp;
+ int irq_guard;
+ int ret;
+ u16 tmp;
+
+ irq_guard = atomic_add_return(1, &mux->irq_guard);
+ if (irq_guard != 1)
+ return 0;
+
+ ret = request_irq(dport->port.irq, dz_interrupt,
+ IRQF_SHARED, "dz", mux);
+ if (ret) {
+ atomic_add(-1, &mux->irq_guard);
+ printk(KERN_ERR "dz: Cannot get IRQ %d!\n", dport->port.irq);
+ return ret;
+ }
spin_lock_irqsave(&dport->port.lock, flags);
- /* enable the interrupt and the scanning */
+ /* Enable interrupts. */
tmp = dz_in(dport, DZ_CSR);
- tmp |= DZ_RIE | DZ_TIE | DZ_MSE;
+ tmp |= DZ_RIE | DZ_TIE;
dz_out(dport, DZ_CSR, tmp);
spin_unlock_irqrestore(&dport->port.lock, flags);
@@ -414,7 +448,25 @@ static int dz_startup(struct uart_port *uport)
*/
static void dz_shutdown(struct uart_port *uport)
{
- dz_stop_tx(uport);
+ struct dz_port *dport = to_dport(uport);
+ struct dz_mux *mux = dport->mux;
+ unsigned long flags;
+ int irq_guard;
+ u16 tmp;
+
+ spin_lock_irqsave(&dport->port.lock, flags);
+ dz_stop_tx(&dport->port);
+ spin_unlock_irqrestore(&dport->port.lock, flags);
+
+ irq_guard = atomic_add_return(-1, &mux->irq_guard);
+ if (!irq_guard) {
+ /* Disable interrupts. */
+ tmp = dz_in(dport, DZ_CSR);
+ tmp &= ~(DZ_RIE | DZ_TIE);
+ dz_out(dport, DZ_CSR, tmp);
+
+ free_irq(dport->port.irq, mux);
+ }
}
/*
@@ -431,7 +483,7 @@ static void dz_shutdown(struct uart_port *uport)
*/
static unsigned int dz_tx_empty(struct uart_port *uport)
{
- struct dz_port *dport = (struct dz_port *)uport;
+ struct dz_port *dport = to_dport(uport);
unsigned short tmp, mask = 1 << dport->port.line;
tmp = dz_in(dport, DZ_TCR);
@@ -446,7 +498,7 @@ static void dz_break_ctl(struct uart_port *uport, int break_state)
* FIXME: Can't access BREAK bits in TDR easily;
* reuse the code for polled TX. --macro
*/
- struct dz_port *dport = (struct dz_port *)uport;
+ struct dz_port *dport = to_dport(uport);
unsigned long flags;
unsigned short tmp, mask = 1 << dport->port.line;
@@ -460,12 +512,69 @@ static void dz_break_ctl(struct uart_port *uport, int break_state)
spin_unlock_irqrestore(&uport->lock, flags);
}
+static int dz_encode_baud_rate(unsigned int baud)
+{
+ switch (baud) {
+ case 50:
+ return DZ_B50;
+ case 75:
+ return DZ_B75;
+ case 110:
+ return DZ_B110;
+ case 134:
+ return DZ_B134;
+ case 150:
+ return DZ_B150;
+ case 300:
+ return DZ_B300;
+ case 600:
+ return DZ_B600;
+ case 1200:
+ return DZ_B1200;
+ case 1800:
+ return DZ_B1800;
+ case 2000:
+ return DZ_B2000;
+ case 2400:
+ return DZ_B2400;
+ case 3600:
+ return DZ_B3600;
+ case 4800:
+ return DZ_B4800;
+ case 7200:
+ return DZ_B7200;
+ case 9600:
+ return DZ_B9600;
+ default:
+ return -1;
+ }
+}
+
+
+static void dz_reset(struct dz_port *dport)
+{
+ struct dz_mux *mux = dport->mux;
+
+ if (mux->initialised)
+ return;
+
+ dz_out(dport, DZ_CSR, DZ_CLR);
+ while (dz_in(dport, DZ_CSR) & DZ_CLR);
+ iob();
+
+ /* Enable scanning. */
+ dz_out(dport, DZ_CSR, DZ_MSE);
+
+ mux->initialised = 1;
+}
+
static void dz_set_termios(struct uart_port *uport, struct ktermios *termios,
struct ktermios *old_termios)
{
- struct dz_port *dport = (struct dz_port *)uport;
+ struct dz_port *dport = to_dport(uport);
unsigned long flags;
unsigned int cflag, baud;
+ int bflag;
cflag = dport->port.line;
@@ -492,105 +601,127 @@ static void dz_set_termios(struct uart_port *uport, struct ktermios *termios,
cflag |= DZ_PARODD;
baud = uart_get_baud_rate(uport, termios, old_termios, 50, 9600);
- switch (baud) {
- case 50:
- cflag |= DZ_B50;
- break;
- case 75:
- cflag |= DZ_B75;
- break;
- case 110:
- cflag |= DZ_B110;
- break;
- case 134:
- cflag |= DZ_B134;
- break;
- case 150:
- cflag |= DZ_B150;
- break;
- case 300:
- cflag |= DZ_B300;
- break;
- case 600:
- cflag |= DZ_B600;
- break;
- case 1200:
- cflag |= DZ_B1200;
- break;
- case 1800:
- cflag |= DZ_B1800;
- break;
- case 2000:
- cflag |= DZ_B2000;
- break;
- case 2400:
- cflag |= DZ_B2400;
- break;
- case 3600:
- cflag |= DZ_B3600;
- break;
- case 4800:
- cflag |= DZ_B4800;
- break;
- case 7200:
- cflag |= DZ_B7200;
- break;
- case 9600:
- default:
- cflag |= DZ_B9600;
+ bflag = dz_encode_baud_rate(baud);
+ if (bflag < 0) { /* Try to keep unchanged. */
+ baud = uart_get_baud_rate(uport, old_termios, NULL, 50, 9600);
+ bflag = dz_encode_baud_rate(baud);
+ if (bflag < 0) { /* Resort to 9600. */
+ baud = 9600;
+ bflag = DZ_B9600;
+ }
+ tty_termios_encode_baud_rate(termios, baud, baud);
}
+ cflag |= bflag;
if (termios->c_cflag & CREAD)
cflag |= DZ_RXENAB;
spin_lock_irqsave(&dport->port.lock, flags);
- dz_out(dport, DZ_LPR, cflag | dport->port.line);
+ uart_update_timeout(uport, termios->c_cflag, baud);
+
+ dz_out(dport, DZ_LPR, cflag);
dport->cflag = cflag;
/* setup accept flag */
dport->port.read_status_mask = DZ_OERR;
if (termios->c_iflag & INPCK)
dport->port.read_status_mask |= DZ_FERR | DZ_PERR;
+ if (termios->c_iflag & (BRKINT | PARMRK))
+ dport->port.read_status_mask |= DZ_BREAK;
/* characters to ignore */
uport->ignore_status_mask = 0;
+ if ((termios->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
+ dport->port.ignore_status_mask |= DZ_OERR;
if (termios->c_iflag & IGNPAR)
dport->port.ignore_status_mask |= DZ_FERR | DZ_PERR;
+ if (termios->c_iflag & IGNBRK)
+ dport->port.ignore_status_mask |= DZ_BREAK;
spin_unlock_irqrestore(&dport->port.lock, flags);
}
-static const char *dz_type(struct uart_port *port)
+static const char *dz_type(struct uart_port *uport)
{
return "DZ";
}
-static void dz_release_port(struct uart_port *port)
+static void dz_release_port(struct uart_port *uport)
{
- /* nothing to do */
+ struct dz_mux *mux = to_dport(uport)->mux;
+ int map_guard;
+
+ iounmap(uport->membase);
+ uport->membase = NULL;
+
+ map_guard = atomic_add_return(-1, &mux->map_guard);
+ if (!map_guard)
+ release_mem_region(uport->mapbase, dec_kn_slot_size);
}
-static int dz_request_port(struct uart_port *port)
+static int dz_map_port(struct uart_port *uport)
{
+ if (!uport->membase)
+ uport->membase = ioremap_nocache(uport->mapbase,
+ dec_kn_slot_size);
+ if (!uport->membase) {
+ printk(KERN_ERR "dz: Cannot map MMIO\n");
+ return -ENOMEM;
+ }
return 0;
}
-static void dz_config_port(struct uart_port *port, int flags)
+static int dz_request_port(struct uart_port *uport)
{
- if (flags & UART_CONFIG_TYPE)
- port->type = PORT_DZ;
+ struct dz_mux *mux = to_dport(uport)->mux;
+ int map_guard;
+ int ret;
+
+ map_guard = atomic_add_return(1, &mux->map_guard);
+ if (map_guard == 1) {
+ if (!request_mem_region(uport->mapbase, dec_kn_slot_size,
+ "dz")) {
+ atomic_add(-1, &mux->map_guard);
+ printk(KERN_ERR
+ "dz: Unable to reserve MMIO resource\n");
+ return -EBUSY;
+ }
+ }
+ ret = dz_map_port(uport);
+ if (ret) {
+ map_guard = atomic_add_return(-1, &mux->map_guard);
+ if (!map_guard)
+ release_mem_region(uport->mapbase, dec_kn_slot_size);
+ return ret;
+ }
+ return 0;
+}
+
+static void dz_config_port(struct uart_port *uport, int flags)
+{
+ struct dz_port *dport = to_dport(uport);
+
+ if (flags & UART_CONFIG_TYPE) {
+ if (dz_request_port(uport))
+ return;
+
+ uport->type = PORT_DZ;
+
+ dz_reset(dport);
+ }
}
/*
- * verify the new serial_struct (for TIOCSSERIAL).
+ * Verify the new serial_struct (for TIOCSSERIAL).
*/
-static int dz_verify_port(struct uart_port *port, struct serial_struct *ser)
+static int dz_verify_port(struct uart_port *uport, struct serial_struct *ser)
{
int ret = 0;
+
if (ser->type != PORT_UNKNOWN && ser->type != PORT_DZ)
ret = -EINVAL;
- if (ser->irq != port->irq)
+ if (ser->irq != uport->irq)
ret = -EINVAL;
return ret;
}
@@ -617,40 +748,32 @@ static struct uart_ops dz_ops = {
static void __init dz_init_ports(void)
{
static int first = 1;
- struct dz_port *dport;
unsigned long base;
- int i;
+ int line;
if (!first)
return;
first = 0;
- if (mips_machtype == MACH_DS23100 ||
- mips_machtype == MACH_DS5100)
- base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_DZ11);
+ if (mips_machtype == MACH_DS23100 || mips_machtype == MACH_DS5100)
+ base = dec_kn_slot_base + KN01_DZ11;
else
- base = CKSEG1ADDR(KN02_SLOT_BASE + KN02_DZ11);
-
- for (i = 0, dport = dz_ports; i < DZ_NB_PORT; i++, dport++) {
- spin_lock_init(&dport->port.lock);
- dport->port.membase = (char *) base;
- dport->port.iotype = UPIO_MEM;
- dport->port.irq = dec_interrupt[DEC_IRQ_DZ11];
- dport->port.line = i;
- dport->port.fifosize = 1;
- dport->port.ops = &dz_ops;
- dport->port.flags = UPF_BOOT_AUTOCONF;
- }
-}
+ base = dec_kn_slot_base + KN02_DZ11;
-static void dz_reset(struct dz_port *dport)
-{
- dz_out(dport, DZ_CSR, DZ_CLR);
- while (dz_in(dport, DZ_CSR) & DZ_CLR);
- iob();
+ for (line = 0; line < DZ_NB_PORT; line++) {
+ struct dz_port *dport = &dz_mux.dport[line];
+ struct uart_port *uport = &dport->port;
- /* enable scanning */
- dz_out(dport, DZ_CSR, DZ_MSE);
+ dport->mux = &dz_mux;
+
+ uport->irq = dec_interrupt[DEC_IRQ_DZ11];
+ uport->fifosize = 1;
+ uport->iotype = UPIO_MEM;
+ uport->flags = UPF_BOOT_AUTOCONF;
+ uport->ops = &dz_ops;
+ uport->line = line;
+ uport->mapbase = base;
+ }
}
#ifdef CONFIG_SERIAL_DZ_CONSOLE
@@ -670,7 +793,7 @@ static void dz_reset(struct dz_port *dport)
*/
static void dz_console_putchar(struct uart_port *uport, int ch)
{
- struct dz_port *dport = (struct dz_port *)uport;
+ struct dz_port *dport = to_dport(uport);
unsigned long flags;
unsigned short csr, tcr, trdy, mask;
int loops = 10000;
@@ -685,7 +808,7 @@ static void dz_console_putchar(struct uart_port *uport, int ch)
iob();
spin_unlock_irqrestore(&dport->port.lock, flags);
- while (loops--) {
+ do {
trdy = dz_in(dport, DZ_CSR);
if (!(trdy & DZ_TRDY))
continue;
@@ -696,7 +819,7 @@ static void dz_console_putchar(struct uart_port *uport, int ch)
dz_out(dport, DZ_TCR, mask);
iob();
udelay(2);
- }
+ } while (loops--);
if (loops) /* Cannot send otherwise. */
dz_out(dport, DZ_TDR, ch);
@@ -717,7 +840,7 @@ static void dz_console_print(struct console *co,
const char *str,
unsigned int count)
{
- struct dz_port *dport = &dz_ports[co->index];
+ struct dz_port *dport = &dz_mux.dport[co->index];
#ifdef DEBUG_DZ
prom_printf((char *) str);
#endif
@@ -726,22 +849,28 @@ static void dz_console_print(struct console *co,
static int __init dz_console_setup(struct console *co, char *options)
{
- struct dz_port *dport = &dz_ports[co->index];
+ struct dz_port *dport = &dz_mux.dport[co->index];
+ struct uart_port *uport = &dport->port;
int baud = 9600;
int bits = 8;
int parity = 'n';
int flow = 'n';
+ int ret;
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
+ ret = dz_map_port(uport);
+ if (ret)
+ return ret;
dz_reset(dport);
+ if (options)
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+
return uart_set_options(&dport->port, co, baud, parity, bits, flow);
}
static struct uart_driver dz_reg;
-static struct console dz_sercons = {
+static struct console dz_console = {
.name = "ttyS",
.write = dz_console_print,
.device = uart_console_device,
@@ -755,7 +884,7 @@ static int __init dz_serial_console_init(void)
{
if (!IOASIC) {
dz_init_ports();
- register_console(&dz_sercons);
+ register_console(&dz_console);
return 0;
} else
return -ENXIO;
@@ -763,7 +892,7 @@ static int __init dz_serial_console_init(void)
console_initcall(dz_serial_console_init);
-#define SERIAL_DZ_CONSOLE &dz_sercons
+#define SERIAL_DZ_CONSOLE &dz_console
#else
#define SERIAL_DZ_CONSOLE NULL
#endif /* CONFIG_SERIAL_DZ_CONSOLE */
@@ -789,26 +918,14 @@ static int __init dz_init(void)
dz_init_ports();
-#ifndef CONFIG_SERIAL_DZ_CONSOLE
- /* reset the chip */
- dz_reset(&dz_ports[0]);
-#endif
-
- if (request_irq(dz_ports[0].port.irq, dz_interrupt,
- IRQF_DISABLED, "DZ", &dz_ports[0]))
- panic("Unable to register DZ interrupt");
-
ret = uart_register_driver(&dz_reg);
- if (ret != 0)
+ if (ret)
return ret;
for (i = 0; i < DZ_NB_PORT; i++)
- uart_add_one_port(&dz_reg, &dz_ports[i].port);
+ uart_add_one_port(&dz_reg, &dz_mux.dport[i].port);
- return ret;
+ return 0;
}
module_init(dz_init);
-
-MODULE_DESCRIPTION("DECstation DZ serial driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/serial/dz.h b/drivers/serial/dz.h
index 9674d4e..faf169e 100644
--- a/drivers/serial/dz.h
+++ b/drivers/serial/dz.h
@@ -33,6 +33,8 @@
#define DZ_FERR 0x2000 /* Frame error indicator */
#define DZ_PERR 0x1000 /* Parity error indicator */
+#define DZ_BREAK 0x0800 /* BREAK event software flag */
+
#define LINE(x) ((x & DZ_LINE_MASK) >> 8) /* Get the line number
from the input buffer */
#define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK))
@@ -107,8 +109,8 @@
#define DZ_B7200 0x0D00
#define DZ_B9600 0x0E00
-#define DZ_CREAD 0x1000 /* Enable receiver */
-#define DZ_RXENAB 0x1000 /* enable receive char */
+#define DZ_RXENAB 0x1000 /* Receiver Enable */
+
/*
* Addresses for the DZ registers
*/
@@ -124,9 +126,4 @@
#define DZ_XMIT_SIZE 4096 /* buffer size */
#define DZ_WAKEUP_CHARS DZ_XMIT_SIZE/4
-#ifdef MODULE
-int init_module (void)
-void cleanup_module (void)
-#endif
-
#endif /* DZ_SERIAL_H */
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index dc19671..56af1f5 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -308,7 +308,7 @@ static void imx_start_tx(struct uart_port *port)
static irqreturn_t imx_rtsint(int irq, void *dev_id)
{
- struct imx_port *sport = (struct imx_port *)dev_id;
+ struct imx_port *sport = dev_id;
unsigned int val = readl(sport->port.membase + USR1) & USR1_RTSS;
unsigned long flags;
@@ -324,7 +324,7 @@ static irqreturn_t imx_rtsint(int irq, void *dev_id)
static irqreturn_t imx_txint(int irq, void *dev_id)
{
- struct imx_port *sport = (struct imx_port *)dev_id;
+ struct imx_port *sport = dev_id;
struct circ_buf *xmit = &sport->port.info->xmit;
unsigned long flags;
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 3c4d29e..a638f23 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -16,6 +16,9 @@
* Some of the code has been inspired/copied from the 2.4 code written
* by Dale Farnsworth <dfarnsworth@mvista.com>.
*
+ * Copyright (C) 2008 Freescale Semiconductor Inc.
+ * John Rigby <jrigby@gmail.com>
+ * Added support for MPC5121
* Copyright (C) 2006 Secret Lab Technologies Ltd.
* Grant Likely <grant.likely@secretlab.ca>
* Copyright (C) 2004-2006 Sylvain Munaut <tnt@246tNt.com>
@@ -67,7 +70,6 @@
#include <linux/serial.h>
#include <linux/sysrq.h>
#include <linux/console.h>
-
#include <linux/delay.h>
#include <linux/io.h>
@@ -79,6 +81,7 @@
#endif
#include <asm/mpc52xx.h>
+#include <asm/mpc512x.h>
#include <asm/mpc52xx_psc.h>
#if defined(CONFIG_SERIAL_MPC52xx_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -111,8 +114,8 @@ static struct device_node *mpc52xx_uart_nodes[MPC52xx_PSC_MAXNUM];
static void mpc52xx_uart_of_enumerate(void);
#endif
+
#define PSC(port) ((struct mpc52xx_psc __iomem *)((port)->membase))
-#define FIFO(port) ((struct mpc52xx_psc_fifo __iomem *)(PSC(port)+1))
/* Forward declaration of the interruption handling routine */
@@ -128,15 +131,301 @@ static irqreturn_t mpc52xx_uart_int(int irq, void *dev_id);
#define uart_console(port) (0)
#endif
+/* ======================================================================== */
+/* PSC fifo operations for isolating differences between 52xx and 512x */
+/* ======================================================================== */
+
+struct psc_ops {
+ void (*fifo_init)(struct uart_port *port);
+ int (*raw_rx_rdy)(struct uart_port *port);
+ int (*raw_tx_rdy)(struct uart_port *port);
+ int (*rx_rdy)(struct uart_port *port);
+ int (*tx_rdy)(struct uart_port *port);
+ int (*tx_empty)(struct uart_port *port);
+ void (*stop_rx)(struct uart_port *port);
+ void (*start_tx)(struct uart_port *port);
+ void (*stop_tx)(struct uart_port *port);
+ void (*rx_clr_irq)(struct uart_port *port);
+ void (*tx_clr_irq)(struct uart_port *port);
+ void (*write_char)(struct uart_port *port, unsigned char c);
+ unsigned char (*read_char)(struct uart_port *port);
+ void (*cw_disable_ints)(struct uart_port *port);
+ void (*cw_restore_ints)(struct uart_port *port);
+ unsigned long (*getuartclk)(void *p);
+};
+
+#ifdef CONFIG_PPC_MPC52xx
+#define FIFO_52xx(port) ((struct mpc52xx_psc_fifo __iomem *)(PSC(port)+1))
+static void mpc52xx_psc_fifo_init(struct uart_port *port)
+{
+ struct mpc52xx_psc __iomem *psc = PSC(port);
+ struct mpc52xx_psc_fifo __iomem *fifo = FIFO_52xx(port);
+
+ /* /32 prescaler */
+ out_be16(&psc->mpc52xx_psc_clock_select, 0xdd00);
+
+ out_8(&fifo->rfcntl, 0x00);
+ out_be16(&fifo->rfalarm, 0x1ff);
+ out_8(&fifo->tfcntl, 0x07);
+ out_be16(&fifo->tfalarm, 0x80);
+
+ port->read_status_mask |= MPC52xx_PSC_IMR_RXRDY | MPC52xx_PSC_IMR_TXRDY;
+ out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask);
+}
+
+static int mpc52xx_psc_raw_rx_rdy(struct uart_port *port)
+{
+ return in_be16(&PSC(port)->mpc52xx_psc_status)
+ & MPC52xx_PSC_SR_RXRDY;
+}
+
+static int mpc52xx_psc_raw_tx_rdy(struct uart_port *port)
+{
+ return in_be16(&PSC(port)->mpc52xx_psc_status)
+ & MPC52xx_PSC_SR_TXRDY;
+}
+
+
+static int mpc52xx_psc_rx_rdy(struct uart_port *port)
+{
+ return in_be16(&PSC(port)->mpc52xx_psc_isr)
+ & port->read_status_mask
+ & MPC52xx_PSC_IMR_RXRDY;
+}
+
+static int mpc52xx_psc_tx_rdy(struct uart_port *port)
+{
+ return in_be16(&PSC(port)->mpc52xx_psc_isr)
+ & port->read_status_mask
+ & MPC52xx_PSC_IMR_TXRDY;
+}
+
+static int mpc52xx_psc_tx_empty(struct uart_port *port)
+{
+ return in_be16(&PSC(port)->mpc52xx_psc_status)
+ & MPC52xx_PSC_SR_TXEMP;
+}
+
+static void mpc52xx_psc_start_tx(struct uart_port *port)
+{
+ port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
+ out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+}
+
+static void mpc52xx_psc_stop_tx(struct uart_port *port)
+{
+ port->read_status_mask &= ~MPC52xx_PSC_IMR_TXRDY;
+ out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+}
+
+static void mpc52xx_psc_stop_rx(struct uart_port *port)
+{
+ port->read_status_mask &= ~MPC52xx_PSC_IMR_RXRDY;
+ out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+}
+
+static void mpc52xx_psc_rx_clr_irq(struct uart_port *port)
+{
+}
+
+static void mpc52xx_psc_tx_clr_irq(struct uart_port *port)
+{
+}
+
+static void mpc52xx_psc_write_char(struct uart_port *port, unsigned char c)
+{
+ out_8(&PSC(port)->mpc52xx_psc_buffer_8, c);
+}
+
+static unsigned char mpc52xx_psc_read_char(struct uart_port *port)
+{
+ return in_8(&PSC(port)->mpc52xx_psc_buffer_8);
+}
+
+static void mpc52xx_psc_cw_disable_ints(struct uart_port *port)
+{
+ out_be16(&PSC(port)->mpc52xx_psc_imr, 0);
+}
+
+static void mpc52xx_psc_cw_restore_ints(struct uart_port *port)
+{
+ out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+}
+
+/* Search for bus-frequency property in this node or a parent */
+static unsigned long mpc52xx_getuartclk(void *p)
+{
#if defined(CONFIG_PPC_MERGE)
-static struct of_device_id mpc52xx_uart_of_match[] = {
- { .type = "serial", .compatible = "fsl,mpc5200-psc-uart", },
- { .type = "serial", .compatible = "mpc5200-psc-uart", }, /* lite5200 */
- { .type = "serial", .compatible = "mpc5200-serial", }, /* efika */
- {},
+ /*
+ * 5200 UARTs have a / 32 prescaler
+ * but the generic serial code assumes 16
+ * so return ipb freq / 2
+ */
+ return mpc52xx_find_ipb_freq(p) / 2;
+#else
+ pr_debug("unexpected call to mpc52xx_getuartclk with arch/ppc\n");
+ return NULL;
+#endif
+}
+
+static struct psc_ops mpc52xx_psc_ops = {
+ .fifo_init = mpc52xx_psc_fifo_init,
+ .raw_rx_rdy = mpc52xx_psc_raw_rx_rdy,
+ .raw_tx_rdy = mpc52xx_psc_raw_tx_rdy,
+ .rx_rdy = mpc52xx_psc_rx_rdy,
+ .tx_rdy = mpc52xx_psc_tx_rdy,
+ .tx_empty = mpc52xx_psc_tx_empty,
+ .stop_rx = mpc52xx_psc_stop_rx,
+ .start_tx = mpc52xx_psc_start_tx,
+ .stop_tx = mpc52xx_psc_stop_tx,
+ .rx_clr_irq = mpc52xx_psc_rx_clr_irq,
+ .tx_clr_irq = mpc52xx_psc_tx_clr_irq,
+ .write_char = mpc52xx_psc_write_char,
+ .read_char = mpc52xx_psc_read_char,
+ .cw_disable_ints = mpc52xx_psc_cw_disable_ints,
+ .cw_restore_ints = mpc52xx_psc_cw_restore_ints,
+ .getuartclk = mpc52xx_getuartclk,
+};
+
+#endif /* CONFIG_MPC52xx */
+
+#ifdef CONFIG_PPC_MPC512x
+#define FIFO_512x(port) ((struct mpc512x_psc_fifo __iomem *)(PSC(port)+1))
+static void mpc512x_psc_fifo_init(struct uart_port *port)
+{
+ out_be32(&FIFO_512x(port)->txcmd, MPC512x_PSC_FIFO_RESET_SLICE);
+ out_be32(&FIFO_512x(port)->txcmd, MPC512x_PSC_FIFO_ENABLE_SLICE);
+ out_be32(&FIFO_512x(port)->txalarm, 1);
+ out_be32(&FIFO_512x(port)->tximr, 0);
+
+ out_be32(&FIFO_512x(port)->rxcmd, MPC512x_PSC_FIFO_RESET_SLICE);
+ out_be32(&FIFO_512x(port)->rxcmd, MPC512x_PSC_FIFO_ENABLE_SLICE);
+ out_be32(&FIFO_512x(port)->rxalarm, 1);
+ out_be32(&FIFO_512x(port)->rximr, 0);
+
+ out_be32(&FIFO_512x(port)->tximr, MPC512x_PSC_FIFO_ALARM);
+ out_be32(&FIFO_512x(port)->rximr, MPC512x_PSC_FIFO_ALARM);
+}
+
+static int mpc512x_psc_raw_rx_rdy(struct uart_port *port)
+{
+ return !(in_be32(&FIFO_512x(port)->rxsr) & MPC512x_PSC_FIFO_EMPTY);
+}
+
+static int mpc512x_psc_raw_tx_rdy(struct uart_port *port)
+{
+ return !(in_be32(&FIFO_512x(port)->txsr) & MPC512x_PSC_FIFO_FULL);
+}
+
+static int mpc512x_psc_rx_rdy(struct uart_port *port)
+{
+ return in_be32(&FIFO_512x(port)->rxsr)
+ & in_be32(&FIFO_512x(port)->rximr)
+ & MPC512x_PSC_FIFO_ALARM;
+}
+
+static int mpc512x_psc_tx_rdy(struct uart_port *port)
+{
+ return in_be32(&FIFO_512x(port)->txsr)
+ & in_be32(&FIFO_512x(port)->tximr)
+ & MPC512x_PSC_FIFO_ALARM;
+}
+
+static int mpc512x_psc_tx_empty(struct uart_port *port)
+{
+ return in_be32(&FIFO_512x(port)->txsr)
+ & MPC512x_PSC_FIFO_EMPTY;
+}
+
+static void mpc512x_psc_stop_rx(struct uart_port *port)
+{
+ unsigned long rx_fifo_imr;
+
+ rx_fifo_imr = in_be32(&FIFO_512x(port)->rximr);
+ rx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM;
+ out_be32(&FIFO_512x(port)->rximr, rx_fifo_imr);
+}
+
+static void mpc512x_psc_start_tx(struct uart_port *port)
+{
+ unsigned long tx_fifo_imr;
+
+ tx_fifo_imr = in_be32(&FIFO_512x(port)->tximr);
+ tx_fifo_imr |= MPC512x_PSC_FIFO_ALARM;
+ out_be32(&FIFO_512x(port)->tximr, tx_fifo_imr);
+}
+
+static void mpc512x_psc_stop_tx(struct uart_port *port)
+{
+ unsigned long tx_fifo_imr;
+
+ tx_fifo_imr = in_be32(&FIFO_512x(port)->tximr);
+ tx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM;
+ out_be32(&FIFO_512x(port)->tximr, tx_fifo_imr);
+}
+
+static void mpc512x_psc_rx_clr_irq(struct uart_port *port)
+{
+ out_be32(&FIFO_512x(port)->rxisr, in_be32(&FIFO_512x(port)->rxisr));
+}
+
+static void mpc512x_psc_tx_clr_irq(struct uart_port *port)
+{
+ out_be32(&FIFO_512x(port)->txisr, in_be32(&FIFO_512x(port)->txisr));
+}
+
+static void mpc512x_psc_write_char(struct uart_port *port, unsigned char c)
+{
+ out_8(&FIFO_512x(port)->txdata_8, c);
+}
+
+static unsigned char mpc512x_psc_read_char(struct uart_port *port)
+{
+ return in_8(&FIFO_512x(port)->rxdata_8);
+}
+
+static void mpc512x_psc_cw_disable_ints(struct uart_port *port)
+{
+ port->read_status_mask =
+ in_be32(&FIFO_512x(port)->tximr) << 16 |
+ in_be32(&FIFO_512x(port)->rximr);
+ out_be32(&FIFO_512x(port)->tximr, 0);
+ out_be32(&FIFO_512x(port)->rximr, 0);
+}
+
+static void mpc512x_psc_cw_restore_ints(struct uart_port *port)
+{
+ out_be32(&FIFO_512x(port)->tximr,
+ (port->read_status_mask >> 16) & 0x7f);
+ out_be32(&FIFO_512x(port)->rximr, port->read_status_mask & 0x7f);
+}
+
+static unsigned long mpc512x_getuartclk(void *p)
+{
+ return mpc512x_find_ips_freq(p);
+}
+
+static struct psc_ops mpc512x_psc_ops = {
+ .fifo_init = mpc512x_psc_fifo_init,
+ .raw_rx_rdy = mpc512x_psc_raw_rx_rdy,
+ .raw_tx_rdy = mpc512x_psc_raw_tx_rdy,
+ .rx_rdy = mpc512x_psc_rx_rdy,
+ .tx_rdy = mpc512x_psc_tx_rdy,
+ .tx_empty = mpc512x_psc_tx_empty,
+ .stop_rx = mpc512x_psc_stop_rx,
+ .start_tx = mpc512x_psc_start_tx,
+ .stop_tx = mpc512x_psc_stop_tx,
+ .rx_clr_irq = mpc512x_psc_rx_clr_irq,
+ .tx_clr_irq = mpc512x_psc_tx_clr_irq,
+ .write_char = mpc512x_psc_write_char,
+ .read_char = mpc512x_psc_read_char,
+ .cw_disable_ints = mpc512x_psc_cw_disable_ints,
+ .cw_restore_ints = mpc512x_psc_cw_restore_ints,
+ .getuartclk = mpc512x_getuartclk,
};
#endif
+static struct psc_ops *psc_ops;
/* ======================================================================== */
/* UART operations */
@@ -145,8 +434,7 @@ static struct of_device_id mpc52xx_uart_of_match[] = {
static unsigned int
mpc52xx_uart_tx_empty(struct uart_port *port)
{
- int status = in_be16(&PSC(port)->mpc52xx_psc_status);
- return (status & MPC52xx_PSC_SR_TXEMP) ? TIOCSER_TEMT : 0;
+ return psc_ops->tx_empty(port) ? TIOCSER_TEMT : 0;
}
static void
@@ -166,16 +454,14 @@ static void
mpc52xx_uart_stop_tx(struct uart_port *port)
{
/* port->lock taken by caller */
- port->read_status_mask &= ~MPC52xx_PSC_IMR_TXRDY;
- out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+ psc_ops->stop_tx(port);
}
static void
mpc52xx_uart_start_tx(struct uart_port *port)
{
/* port->lock taken by caller */
- port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
- out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+ psc_ops->start_tx(port);
}
static void
@@ -188,8 +474,7 @@ mpc52xx_uart_send_xchar(struct uart_port *port, char ch)
if (ch) {
/* Make sure tx interrupts are on */
/* Truly necessary ??? They should be anyway */
- port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
- out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+ psc_ops->start_tx(port);
}
spin_unlock_irqrestore(&port->lock, flags);
@@ -199,8 +484,7 @@ static void
mpc52xx_uart_stop_rx(struct uart_port *port)
{
/* port->lock taken by caller */
- port->read_status_mask &= ~MPC52xx_PSC_IMR_RXRDY;
- out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
+ psc_ops->stop_rx(port);
}
static void
@@ -227,12 +511,12 @@ static int
mpc52xx_uart_startup(struct uart_port *port)
{
struct mpc52xx_psc __iomem *psc = PSC(port);
- struct mpc52xx_psc_fifo __iomem *fifo = FIFO(port);
int ret;
/* Request IRQ */
ret = request_irq(port->irq, mpc52xx_uart_int,
- IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "mpc52xx_psc_uart", port);
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM | IRQF_SHARED,
+ "mpc52xx_psc_uart", port);
if (ret)
return ret;
@@ -242,15 +526,7 @@ mpc52xx_uart_startup(struct uart_port *port)
out_be32(&psc->sicr, 0); /* UART mode DCD ignored */
- out_be16(&psc->mpc52xx_psc_clock_select, 0xdd00); /* /16 prescaler on */
-
- out_8(&fifo->rfcntl, 0x00);
- out_be16(&fifo->rfalarm, 0x1ff);
- out_8(&fifo->tfcntl, 0x07);
- out_be16(&fifo->tfalarm, 0x80);
-
- port->read_status_mask |= MPC52xx_PSC_IMR_RXRDY | MPC52xx_PSC_IMR_TXRDY;
- out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask);
+ psc_ops->fifo_init(port);
out_8(&psc->command, MPC52xx_PSC_TX_ENABLE);
out_8(&psc->command, MPC52xx_PSC_RX_ENABLE);
@@ -333,8 +609,7 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
* boot for the console, all stuff is not yet ready to receive at that
* time and that just makes the kernel oops */
/* while (j-- && mpc52xx_uart_int_rx_chars(port)); */
- while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
- --j)
+ while (!mpc52xx_uart_tx_empty(port) && --j)
udelay(1);
if (!j)
@@ -462,11 +737,9 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
unsigned short status;
/* While we can read, do so ! */
- while ((status = in_be16(&PSC(port)->mpc52xx_psc_status)) &
- MPC52xx_PSC_SR_RXRDY) {
-
+ while (psc_ops->raw_rx_rdy(port)) {
/* Get the char */
- ch = in_8(&PSC(port)->mpc52xx_psc_buffer_8);
+ ch = psc_ops->read_char(port);
/* Handle sysreq char */
#ifdef SUPPORT_SYSRQ
@@ -481,6 +754,8 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
flag = TTY_NORMAL;
port->icount.rx++;
+ status = in_be16(&PSC(port)->mpc52xx_psc_status);
+
if (status & (MPC52xx_PSC_SR_PE |
MPC52xx_PSC_SR_FE |
MPC52xx_PSC_SR_RB)) {
@@ -510,7 +785,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
tty_flip_buffer_push(tty);
- return in_be16(&PSC(port)->mpc52xx_psc_status) & MPC52xx_PSC_SR_RXRDY;
+ return psc_ops->raw_rx_rdy(port);
}
static inline int
@@ -520,7 +795,7 @@ mpc52xx_uart_int_tx_chars(struct uart_port *port)
/* Process out of band chars */
if (port->x_char) {
- out_8(&PSC(port)->mpc52xx_psc_buffer_8, port->x_char);
+ psc_ops->write_char(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
return 1;
@@ -533,8 +808,8 @@ mpc52xx_uart_int_tx_chars(struct uart_port *port)
}
/* Send chars */
- while (in_be16(&PSC(port)->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXRDY) {
- out_8(&PSC(port)->mpc52xx_psc_buffer_8, xmit->buf[xmit->tail]);
+ while (psc_ops->raw_tx_rdy(port)) {
+ psc_ops->write_char(port, xmit->buf[xmit->tail]);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (uart_circ_empty(xmit))
@@ -560,7 +835,6 @@ mpc52xx_uart_int(int irq, void *dev_id)
struct uart_port *port = dev_id;
unsigned long pass = ISR_PASS_LIMIT;
unsigned int keepgoing;
- unsigned short status;
spin_lock(&port->lock);
@@ -569,18 +843,12 @@ mpc52xx_uart_int(int irq, void *dev_id)
/* If we don't find anything to do, we stop */
keepgoing = 0;
- /* Read status */
- status = in_be16(&PSC(port)->mpc52xx_psc_isr);
- status &= port->read_status_mask;
-
- /* Do we need to receive chars ? */
- /* For this RX interrupts must be on and some chars waiting */
- if (status & MPC52xx_PSC_IMR_RXRDY)
+ psc_ops->rx_clr_irq(port);
+ if (psc_ops->rx_rdy(port))
keepgoing |= mpc52xx_uart_int_rx_chars(port);
- /* Do we need to send chars ? */
- /* For this, TX must be ready and TX interrupt enabled */
- if (status & MPC52xx_PSC_IMR_TXRDY)
+ psc_ops->tx_clr_irq(port);
+ if (psc_ops->tx_rdy(port))
keepgoing |= mpc52xx_uart_int_tx_chars(port);
/* Limit number of iteration */
@@ -647,36 +915,33 @@ static void
mpc52xx_console_write(struct console *co, const char *s, unsigned int count)
{
struct uart_port *port = &mpc52xx_uart_ports[co->index];
- struct mpc52xx_psc __iomem *psc = PSC(port);
unsigned int i, j;
/* Disable interrupts */
- out_be16(&psc->mpc52xx_psc_imr, 0);
+ psc_ops->cw_disable_ints(port);
/* Wait the TX buffer to be empty */
j = 5000000; /* Maximum wait */
- while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
- --j)
+ while (!mpc52xx_uart_tx_empty(port) && --j)
udelay(1);
/* Write all the chars */
for (i = 0; i < count; i++, s++) {
/* Line return handling */
if (*s == '\n')
- out_8(&psc->mpc52xx_psc_buffer_8, '\r');
+ psc_ops->write_char(port, '\r');
/* Send the char */
- out_8(&psc->mpc52xx_psc_buffer_8, *s);
+ psc_ops->write_char(port, *s);
/* Wait the TX buffer to be empty */
j = 20000; /* Maximum wait */
- while (!(in_be16(&psc->mpc52xx_psc_status) &
- MPC52xx_PSC_SR_TXEMP) && --j)
+ while (!mpc52xx_uart_tx_empty(port) && --j)
udelay(1);
}
/* Restore interrupt state */
- out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask);
+ psc_ops->cw_restore_ints(port);
}
#if !defined(CONFIG_PPC_MERGE)
@@ -721,7 +986,7 @@ mpc52xx_console_setup(struct console *co, char *options)
{
struct uart_port *port = &mpc52xx_uart_ports[co->index];
struct device_node *np = mpc52xx_uart_nodes[co->index];
- unsigned int ipb_freq;
+ unsigned int uartclk;
struct resource res;
int ret;
@@ -753,17 +1018,16 @@ mpc52xx_console_setup(struct console *co, char *options)
return ret;
}
- /* Search for bus-frequency property in this node or a parent */
- ipb_freq = mpc52xx_find_ipb_freq(np);
- if (ipb_freq == 0) {
- pr_debug("Could not find IPB bus frequency!\n");
+ uartclk = psc_ops->getuartclk(np);
+ if (uartclk == 0) {
+ pr_debug("Could not find uart clock frequency!\n");
return -EINVAL;
}
/* Basic port init. Needed since we use some uart_??? func before
* real init for early access */
spin_lock_init(&port->lock);
- port->uartclk = ipb_freq / 2;
+ port->uartclk = uartclk;
port->ops = &mpc52xx_uart_ops;
port->mapbase = res.start;
port->membase = ioremap(res.start, sizeof(struct mpc52xx_psc));
@@ -945,11 +1209,25 @@ static struct platform_driver mpc52xx_uart_platform_driver = {
/* OF Platform Driver */
/* ======================================================================== */
+static struct of_device_id mpc52xx_uart_of_match[] = {
+#ifdef CONFIG_PPC_MPC52xx
+ { .compatible = "fsl,mpc5200-psc-uart", .data = &mpc52xx_psc_ops, },
+ /* binding used by old lite5200 device trees: */
+ { .compatible = "mpc5200-psc-uart", .data = &mpc52xx_psc_ops, },
+ /* binding used by efika: */
+ { .compatible = "mpc5200-serial", .data = &mpc52xx_psc_ops, },
+#endif
+#ifdef CONFIG_PPC_MPC512x
+ { .compatible = "fsl,mpc5121-psc-uart", .data = &mpc512x_psc_ops, },
+ {},
+#endif
+};
+
static int __devinit
mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
{
int idx = -1;
- unsigned int ipb_freq;
+ unsigned int uartclk;
struct uart_port *port = NULL;
struct resource res;
int ret;
@@ -965,10 +1243,9 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
pr_debug("Found %s assigned to ttyPSC%x\n",
mpc52xx_uart_nodes[idx]->full_name, idx);
- /* Search for bus-frequency property in this node or a parent */
- ipb_freq = mpc52xx_find_ipb_freq(op->node);
- if (ipb_freq == 0) {
- dev_dbg(&op->dev, "Could not find IPB bus frequency!\n");
+ uartclk = psc_ops->getuartclk(op->node);
+ if (uartclk == 0) {
+ dev_dbg(&op->dev, "Could not find uart clock frequency!\n");
return -EINVAL;
}
@@ -976,7 +1253,7 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
port = &mpc52xx_uart_ports[idx];
spin_lock_init(&port->lock);
- port->uartclk = ipb_freq / 2;
+ port->uartclk = uartclk;
port->fifosize = 512;
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF |
@@ -1080,15 +1357,19 @@ mpc52xx_uart_of_enumerate(void)
static int enum_done;
struct device_node *np;
const unsigned int *devno;
+ const struct of_device_id *match;
int i;
if (enum_done)
return;
for_each_node_by_type(np, "serial") {
- if (!of_match_node(mpc52xx_uart_of_match, np))
+ match = of_match_node(mpc52xx_uart_of_match, np);
+ if (!match)
continue;
+ psc_ops = match->data;
+
/* Is a particular device number requested? */
devno = of_get_property(np, "port-number", NULL);
mpc52xx_uart_of_assign(np, devno ? *devno : -1);
@@ -1149,6 +1430,7 @@ mpc52xx_uart_init(void)
return ret;
}
#else
+ psc_ops = &mpc52xx_psc_ops;
ret = platform_driver_register(&mpc52xx_uart_platform_driver);
if (ret) {
printk(KERN_ERR "%s: platform_driver_register failed (%i)\n",
diff --git a/drivers/serial/sc26xx.c b/drivers/serial/sc26xx.c
new file mode 100644
index 0000000..a350b6d
--- /dev/null
+++ b/drivers/serial/sc26xx.c
@@ -0,0 +1,755 @@
+/*
+ * SC268xx.c: Serial driver for Philiphs SC2681/SC2692 devices.
+ *
+ * Copyright (C) 2006,2007 Thomas Bogendörfer (tsbogend@alpha.franken.de)
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/major.h>
+#include <linux/circ_buf.h>
+#include <linux/serial.h>
+#include <linux/sysrq.h>
+#include <linux/console.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+
+#if defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <linux/serial_core.h>
+
+#define SC26XX_MAJOR 204
+#define SC26XX_MINOR_START 205
+#define SC26XX_NR 2
+
+struct uart_sc26xx_port {
+ struct uart_port port[2];
+ u8 dsr_mask[2];
+ u8 cts_mask[2];
+ u8 dcd_mask[2];
+ u8 ri_mask[2];
+ u8 dtr_mask[2];
+ u8 rts_mask[2];
+ u8 imr;
+};
+
+/* register common to both ports */
+#define RD_ISR 0x14
+#define RD_IPR 0x34
+
+#define WR_ACR 0x10
+#define WR_IMR 0x14
+#define WR_OPCR 0x34
+#define WR_OPR_SET 0x38
+#define WR_OPR_CLR 0x3C
+
+/* access common register */
+#define READ_SC(p, r) readb((p)->membase + RD_##r)
+#define WRITE_SC(p, r, v) writeb((v), (p)->membase + WR_##r)
+
+/* register per port */
+#define RD_PORT_MRx 0x00
+#define RD_PORT_SR 0x04
+#define RD_PORT_RHR 0x0c
+
+#define WR_PORT_MRx 0x00
+#define WR_PORT_CSR 0x04
+#define WR_PORT_CR 0x08
+#define WR_PORT_THR 0x0c
+
+/* SR bits */
+#define SR_BREAK (1 << 7)
+#define SR_FRAME (1 << 6)
+#define SR_PARITY (1 << 5)
+#define SR_OVERRUN (1 << 4)
+#define SR_TXRDY (1 << 2)
+#define SR_RXRDY (1 << 0)
+
+#define CR_RES_MR (1 << 4)
+#define CR_RES_RX (2 << 4)
+#define CR_RES_TX (3 << 4)
+#define CR_STRT_BRK (6 << 4)
+#define CR_STOP_BRK (7 << 4)
+#define CR_DIS_TX (1 << 3)
+#define CR_ENA_TX (1 << 2)
+#define CR_DIS_RX (1 << 1)
+#define CR_ENA_RX (1 << 0)
+
+/* ISR bits */
+#define ISR_RXRDYB (1 << 5)
+#define ISR_TXRDYB (1 << 4)
+#define ISR_RXRDYA (1 << 1)
+#define ISR_TXRDYA (1 << 0)
+
+/* IMR bits */
+#define IMR_RXRDY (1 << 1)
+#define IMR_TXRDY (1 << 0)
+
+/* access port register */
+static inline u8 read_sc_port(struct uart_port *p, u8 reg)
+{
+ return readb(p->membase + p->line * 0x20 + reg);
+}
+
+static inline void write_sc_port(struct uart_port *p, u8 reg, u8 val)
+{
+ writeb(val, p->membase + p->line * 0x20 + reg);
+}
+
+#define READ_SC_PORT(p, r) read_sc_port(p, RD_PORT_##r)
+#define WRITE_SC_PORT(p, r, v) write_sc_port(p, WR_PORT_##r, v)
+
+static void sc26xx_enable_irq(struct uart_port *port, int mask)
+{
+ struct uart_sc26xx_port *up;
+ int line = port->line;
+
+ port -= line;
+ up = container_of(port, struct uart_sc26xx_port, port[0]);
+
+ up->imr |= mask << (line * 4);
+ WRITE_SC(port, IMR, up->imr);
+}
+
+static void sc26xx_disable_irq(struct uart_port *port, int mask)
+{
+ struct uart_sc26xx_port *up;
+ int line = port->line;
+
+ port -= line;
+ up = container_of(port, struct uart_sc26xx_port, port[0]);
+
+ up->imr &= ~(mask << (line * 4));
+ WRITE_SC(port, IMR, up->imr);
+}
+
+static struct tty_struct *receive_chars(struct uart_port *port)
+{
+ struct tty_struct *tty = NULL;
+ int limit = 10000;
+ unsigned char ch;
+ char flag;
+ u8 status;
+
+ if (port->info != NULL) /* Unopened serial console */
+ tty = port->info->tty;
+
+ while (limit-- > 0) {
+ status = READ_SC_PORT(port, SR);
+ if (!(status & SR_RXRDY))
+ break;
+ ch = READ_SC_PORT(port, RHR);
+
+ flag = TTY_NORMAL;
+ port->icount.rx++;
+
+ if (unlikely(status & (SR_BREAK | SR_FRAME |
+ SR_PARITY | SR_OVERRUN))) {
+ if (status & SR_BREAK) {
+ status &= ~(SR_PARITY | SR_FRAME);
+ port->icount.brk++;
+ if (uart_handle_break(port))
+ continue;
+ } else if (status & SR_PARITY)
+ port->icount.parity++;
+ else if (status & SR_FRAME)
+ port->icount.frame++;
+ if (status & SR_OVERRUN)
+ port->icount.overrun++;
+
+ status &= port->read_status_mask;
+ if (status & SR_BREAK)
+ flag = TTY_BREAK;
+ else if (status & SR_PARITY)
+ flag = TTY_PARITY;
+ else if (status & SR_FRAME)
+ flag = TTY_FRAME;
+ }
+
+ if (uart_handle_sysrq_char(port, ch))
+ continue;
+
+ if (status & port->ignore_status_mask)
+ continue;
+
+ tty_insert_flip_char(tty, ch, flag);
+ }
+ return tty;
+}
+
+static void transmit_chars(struct uart_port *port)
+{
+ struct circ_buf *xmit;
+
+ if (!port->info)
+ return;
+
+ xmit = &port->info->xmit;
+ if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+ sc26xx_disable_irq(port, IMR_TXRDY);
+ return;
+ }
+ while (!uart_circ_empty(xmit)) {
+ if (!(READ_SC_PORT(port, SR) & SR_TXRDY))
+ break;
+
+ WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]);
+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ port->icount.tx++;
+ }
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(port);
+}
+
+static irqreturn_t sc26xx_interrupt(int irq, void *dev_id)
+{
+ struct uart_sc26xx_port *up = dev_id;
+ struct tty_struct *tty;
+ unsigned long flags;
+ u8 isr;
+
+ spin_lock_irqsave(&up->port[0].lock, flags);
+
+ tty = NULL;
+ isr = READ_SC(&up->port[0], ISR);
+ if (isr & ISR_TXRDYA)
+ transmit_chars(&up->port[0]);
+ if (isr & ISR_RXRDYA)
+ tty = receive_chars(&up->port[0]);
+
+ spin_unlock(&up->port[0].lock);
+
+ if (tty)
+ tty_flip_buffer_push(tty);
+
+ spin_lock(&up->port[1].lock);
+
+ tty = NULL;
+ if (isr & ISR_TXRDYB)
+ transmit_chars(&up->port[1]);
+ if (isr & ISR_RXRDYB)
+ tty = receive_chars(&up->port[1]);
+
+ spin_unlock_irqrestore(&up->port[1].lock, flags);
+
+ if (tty)
+ tty_flip_buffer_push(tty);
+
+ return IRQ_HANDLED;
+}
+
+/* port->lock is not held. */
+static unsigned int sc26xx_tx_empty(struct uart_port *port)
+{
+ return (READ_SC_PORT(port, SR) & SR_TXRDY) ? TIOCSER_TEMT : 0;
+}
+
+/* port->lock held by caller. */
+static void sc26xx_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+ struct uart_sc26xx_port *up;
+ int line = port->line;
+
+ port -= line;
+ up = container_of(port, struct uart_sc26xx_port, port[0]);
+
+ if (up->dtr_mask[line]) {
+ if (mctrl & TIOCM_DTR)
+ WRITE_SC(port, OPR_SET, up->dtr_mask[line]);
+ else
+ WRITE_SC(port, OPR_CLR, up->dtr_mask[line]);
+ }
+ if (up->rts_mask[line]) {
+ if (mctrl & TIOCM_RTS)
+ WRITE_SC(port, OPR_SET, up->rts_mask[line]);
+ else
+ WRITE_SC(port, OPR_CLR, up->rts_mask[line]);
+ }
+}
+
+/* port->lock is held by caller and interrupts are disabled. */
+static unsigned int sc26xx_get_mctrl(struct uart_port *port)
+{
+ struct uart_sc26xx_port *up;
+ int line = port->line;
+ unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR;
+ u8 ipr;
+
+ port -= line;
+ up = container_of(port, struct uart_sc26xx_port, port[0]);
+ ipr = READ_SC(port, IPR) ^ 0xff;
+
+ if (up->dsr_mask[line]) {
+ mctrl &= ~TIOCM_DSR;
+ mctrl |= ipr & up->dsr_mask[line] ? TIOCM_DSR : 0;
+ }
+ if (up->cts_mask[line]) {
+ mctrl &= ~TIOCM_CTS;
+ mctrl |= ipr & up->cts_mask[line] ? TIOCM_CTS : 0;
+ }
+ if (up->dcd_mask[line]) {
+ mctrl &= ~TIOCM_CAR;
+ mctrl |= ipr & up->dcd_mask[line] ? TIOCM_CAR : 0;
+ }
+ if (up->ri_mask[line]) {
+ mctrl &= ~TIOCM_RNG;
+ mctrl |= ipr & up->ri_mask[line] ? TIOCM_RNG : 0;
+ }
+ return mctrl;
+}
+
+/* port->lock held by caller. */
+static void sc26xx_stop_tx(struct uart_port *port)
+{
+ return;
+}
+
+/* port->lock held by caller. */
+static void sc26xx_start_tx(struct uart_port *port)
+{
+ struct circ_buf *xmit = &port->info->xmit;
+
+ while (!uart_circ_empty(xmit)) {
+ if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) {
+ sc26xx_enable_irq(port, IMR_TXRDY);
+ break;
+ }
+ WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]);
+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ port->icount.tx++;
+ }
+}
+
+/* port->lock held by caller. */
+static void sc26xx_stop_rx(struct uart_port *port)
+{
+}
+
+/* port->lock held by caller. */
+static void sc26xx_enable_ms(struct uart_port *port)
+{
+}
+
+/* port->lock is not held. */
+static void sc26xx_break_ctl(struct uart_port *port, int break_state)
+{
+ if (break_state == -1)
+ WRITE_SC_PORT(port, CR, CR_STRT_BRK);
+ else
+ WRITE_SC_PORT(port, CR, CR_STOP_BRK);
+}
+
+/* port->lock is not held. */
+static int sc26xx_startup(struct uart_port *port)
+{
+ sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY);
+ WRITE_SC(port, OPCR, 0);
+
+ /* reset tx and rx */
+ WRITE_SC_PORT(port, CR, CR_RES_RX);
+ WRITE_SC_PORT(port, CR, CR_RES_TX);
+
+ /* start rx/tx */
+ WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX);
+
+ /* enable irqs */
+ sc26xx_enable_irq(port, IMR_RXRDY);
+ return 0;
+}
+
+/* port->lock is not held. */
+static void sc26xx_shutdown(struct uart_port *port)
+{
+ /* disable interrupst */
+ sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY);
+
+ /* stop tx/rx */
+ WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX);
+}
+
+/* port->lock is not held. */
+static void sc26xx_set_termios(struct uart_port *port, struct ktermios *termios,
+ struct ktermios *old)
+{
+ unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000);
+ unsigned int quot = uart_get_divisor(port, baud);
+ unsigned int iflag, cflag;
+ unsigned long flags;
+ u8 mr1, mr2, csr;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc)
+ udelay(2);
+
+ WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX);
+
+ iflag = termios->c_iflag;
+ cflag = termios->c_cflag;
+
+ port->read_status_mask = SR_OVERRUN;
+ if (iflag & INPCK)
+ port->read_status_mask |= SR_PARITY | SR_FRAME;
+ if (iflag & (BRKINT | PARMRK))
+ port->read_status_mask |= SR_BREAK;
+
+ port->ignore_status_mask = 0;
+ if (iflag & IGNBRK)
+ port->ignore_status_mask |= SR_BREAK;
+ if ((cflag & CREAD) == 0)
+ port->ignore_status_mask |= SR_BREAK | SR_FRAME |
+ SR_PARITY | SR_OVERRUN;
+
+ switch (cflag & CSIZE) {
+ case CS5:
+ mr1 = 0x00;
+ break;
+ case CS6:
+ mr1 = 0x01;
+ break;
+ case CS7:
+ mr1 = 0x02;
+ break;
+ default:
+ case CS8:
+ mr1 = 0x03;
+ break;
+ }
+ mr2 = 0x07;
+ if (cflag & CSTOPB)
+ mr2 = 0x0f;
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ mr1 |= (1 << 2);
+ } else
+ mr1 |= (2 << 3);
+
+ switch (baud) {
+ case 50:
+ csr = 0x00;
+ break;
+ case 110:
+ csr = 0x11;
+ break;
+ case 134:
+ csr = 0x22;
+ break;
+ case 200:
+ csr = 0x33;
+ break;
+ case 300:
+ csr = 0x44;
+ break;
+ case 600:
+ csr = 0x55;
+ break;
+ case 1200:
+ csr = 0x66;
+ break;
+ case 2400:
+ csr = 0x88;
+ break;
+ case 4800:
+ csr = 0x99;
+ break;
+ default:
+ case 9600:
+ csr = 0xbb;
+ break;
+ case 19200:
+ csr = 0xcc;
+ break;
+ }
+
+ WRITE_SC_PORT(port, CR, CR_RES_MR);
+ WRITE_SC_PORT(port, MRx, mr1);
+ WRITE_SC_PORT(port, MRx, mr2);
+
+ WRITE_SC(port, ACR, 0x80);
+ WRITE_SC_PORT(port, CSR, csr);
+
+ /* reset tx and rx */
+ WRITE_SC_PORT(port, CR, CR_RES_RX);
+ WRITE_SC_PORT(port, CR, CR_RES_TX);
+
+ WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX);
+ while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc)
+ udelay(2);
+
+ /* XXX */
+ uart_update_timeout(port, cflag,
+ (port->uartclk / (16 * quot)));
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static const char *sc26xx_type(struct uart_port *port)
+{
+ return "SC26XX";
+}
+
+static void sc26xx_release_port(struct uart_port *port)
+{
+}
+
+static int sc26xx_request_port(struct uart_port *port)
+{
+ return 0;
+}
+
+static void sc26xx_config_port(struct uart_port *port, int flags)
+{
+}
+
+static int sc26xx_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+ return -EINVAL;
+}
+
+static struct uart_ops sc26xx_ops = {
+ .tx_empty = sc26xx_tx_empty,
+ .set_mctrl = sc26xx_set_mctrl,
+ .get_mctrl = sc26xx_get_mctrl,
+ .stop_tx = sc26xx_stop_tx,
+ .start_tx = sc26xx_start_tx,
+ .stop_rx = sc26xx_stop_rx,
+ .enable_ms = sc26xx_enable_ms,
+ .break_ctl = sc26xx_break_ctl,
+ .startup = sc26xx_startup,
+ .shutdown = sc26xx_shutdown,
+ .set_termios = sc26xx_set_termios,
+ .type = sc26xx_type,
+ .release_port = sc26xx_release_port,
+ .request_port = sc26xx_request_port,
+ .config_port = sc26xx_config_port,
+ .verify_port = sc26xx_verify_port,
+};
+
+static struct uart_port *sc26xx_port;
+
+#ifdef CONFIG_SERIAL_SC26XX_CONSOLE
+static void sc26xx_console_putchar(struct uart_port *port, char c)
+{
+ unsigned long flags;
+ int limit = 1000000;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ while (limit-- > 0) {
+ if (READ_SC_PORT(port, SR) & SR_TXRDY) {
+ WRITE_SC_PORT(port, THR, c);
+ break;
+ }
+ udelay(2);
+ }
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void sc26xx_console_write(struct console *con, const char *s, unsigned n)
+{
+ struct uart_port *port = sc26xx_port;
+ int i;
+
+ for (i = 0; i < n; i++) {
+ if (*s == '\n')
+ sc26xx_console_putchar(port, '\r');
+ sc26xx_console_putchar(port, *s++);
+ }
+}
+
+static int __init sc26xx_console_setup(struct console *con, char *options)
+{
+ struct uart_port *port = sc26xx_port;
+ int baud = 9600;
+ int bits = 8;
+ int parity = 'n';
+ int flow = 'n';
+
+ if (port->type != PORT_SC26XX)
+ return -1;
+
+ printk(KERN_INFO "Console: ttySC%d (SC26XX)\n", con->index);
+ if (options)
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+ return uart_set_options(port, con, baud, parity, bits, flow);
+}
+
+static struct uart_driver sc26xx_reg;
+static struct console sc26xx_console = {
+ .name = "ttySC",
+ .write = sc26xx_console_write,
+ .device = uart_console_device,
+ .setup = sc26xx_console_setup,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+ .data = &sc26xx_reg,
+};
+#define SC26XX_CONSOLE &sc26xx_console
+#else
+#define SC26XX_CONSOLE NULL
+#endif
+
+static struct uart_driver sc26xx_reg = {
+ .owner = THIS_MODULE,
+ .driver_name = "SC26xx",
+ .dev_name = "ttySC",
+ .major = SC26XX_MAJOR,
+ .minor = SC26XX_MINOR_START,
+ .nr = SC26XX_NR,
+ .cons = SC26XX_CONSOLE,
+};
+
+static u8 sc26xx_flags2mask(unsigned int flags, unsigned int bitpos)
+{
+ unsigned int bit = (flags >> bitpos) & 15;
+
+ return bit ? (1 << (bit - 1)) : 0;
+}
+
+static void __devinit sc26xx_init_masks(struct uart_sc26xx_port *up,
+ int line, unsigned int data)
+{
+ up->dtr_mask[line] = sc26xx_flags2mask(data, 0);
+ up->rts_mask[line] = sc26xx_flags2mask(data, 4);
+ up->dsr_mask[line] = sc26xx_flags2mask(data, 8);
+ up->cts_mask[line] = sc26xx_flags2mask(data, 12);
+ up->dcd_mask[line] = sc26xx_flags2mask(data, 16);
+ up->ri_mask[line] = sc26xx_flags2mask(data, 20);
+}
+
+static int __devinit sc26xx_probe(struct platform_device *dev)
+{
+ struct resource *res;
+ struct uart_sc26xx_port *up;
+ unsigned int *sc26xx_data = dev->dev.platform_data;
+ int err;
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ up = kzalloc(sizeof *up, GFP_KERNEL);
+ if (unlikely(!up))
+ return -ENOMEM;
+
+ up->port[0].line = 0;
+ up->port[0].ops = &sc26xx_ops;
+ up->port[0].type = PORT_SC26XX;
+ up->port[0].uartclk = (29491200 / 16); /* arbitrary */
+
+ up->port[0].mapbase = res->start;
+ up->port[0].membase = ioremap_nocache(up->port[0].mapbase, 0x40);
+ up->port[0].iotype = UPIO_MEM;
+ up->port[0].irq = platform_get_irq(dev, 0);
+
+ up->port[0].dev = &dev->dev;
+
+ sc26xx_init_masks(up, 0, sc26xx_data[0]);
+
+ sc26xx_port = &up->port[0];
+
+ up->port[1].line = 1;
+ up->port[1].ops = &sc26xx_ops;
+ up->port[1].type = PORT_SC26XX;
+ up->port[1].uartclk = (29491200 / 16); /* arbitrary */
+
+ up->port[1].mapbase = up->port[0].mapbase;
+ up->port[1].membase = up->port[0].membase;
+ up->port[1].iotype = UPIO_MEM;
+ up->port[1].irq = up->port[0].irq;
+
+ up->port[1].dev = &dev->dev;
+
+ sc26xx_init_masks(up, 1, sc26xx_data[1]);
+
+ err = uart_register_driver(&sc26xx_reg);
+ if (err)
+ goto out_free_port;
+
+ sc26xx_reg.tty_driver->name_base = sc26xx_reg.minor;
+
+ err = uart_add_one_port(&sc26xx_reg, &up->port[0]);
+ if (err)
+ goto out_unregister_driver;
+
+ err = uart_add_one_port(&sc26xx_reg, &up->port[1]);
+ if (err)
+ goto out_remove_port0;
+
+ err = request_irq(up->port[0].irq, sc26xx_interrupt, 0, "sc26xx", up);
+ if (err)
+ goto out_remove_ports;
+
+ dev_set_drvdata(&dev->dev, up);
+ return 0;
+
+out_remove_ports:
+ uart_remove_one_port(&sc26xx_reg, &up->port[1]);
+out_remove_port0:
+ uart_remove_one_port(&sc26xx_reg, &up->port[0]);
+
+out_unregister_driver:
+ uart_unregister_driver(&sc26xx_reg);
+
+out_free_port:
+ kfree(up);
+ sc26xx_port = NULL;
+ return err;
+}
+
+
+static int __exit sc26xx_driver_remove(struct platform_device *dev)
+{
+ struct uart_sc26xx_port *up = dev_get_drvdata(&dev->dev);
+
+ free_irq(up->port[0].irq, up);
+
+ uart_remove_one_port(&sc26xx_reg, &up->port[0]);
+ uart_remove_one_port(&sc26xx_reg, &up->port[1]);
+
+ uart_unregister_driver(&sc26xx_reg);
+
+ kfree(up);
+ sc26xx_port = NULL;
+
+ dev_set_drvdata(&dev->dev, NULL);
+ return 0;
+}
+
+static struct platform_driver sc26xx_driver = {
+ .probe = sc26xx_probe,
+ .remove = __devexit_p(sc26xx_driver_remove),
+ .driver = {
+ .name = "SC26xx",
+ },
+};
+
+static int __init sc26xx_init(void)
+{
+ return platform_driver_register(&sc26xx_driver);
+}
+
+static void __exit sc26xx_exit(void)
+{
+ platform_driver_unregister(&sc26xx_driver);
+}
+
+module_init(sc26xx_init);
+module_exit(sc26xx_exit);
+
+
+MODULE_AUTHOR("Thomas Bogendörfer");
+MODULE_DESCRIPTION("SC681/SC2692 serial driver");
+MODULE_VERSION("1.0");
+MODULE_LICENSE("GPL");
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 276da14..0f5a179 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -58,7 +58,8 @@ static struct lock_class_key port_lock_key;
#define uart_console(port) (0)
#endif
-static void uart_change_speed(struct uart_state *state, struct ktermios *old_termios);
+static void uart_change_speed(struct uart_state *state,
+ struct ktermios *old_termios);
static void uart_wait_until_sent(struct tty_struct *tty, int timeout);
static void uart_change_pm(struct uart_state *state, int pm_state);
@@ -129,8 +130,8 @@ uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear)
spin_unlock_irqrestore(&port->lock, flags);
}
-#define uart_set_mctrl(port,set) uart_update_mctrl(port,set,0)
-#define uart_clear_mctrl(port,clear) uart_update_mctrl(port,0,clear)
+#define uart_set_mctrl(port, set) uart_update_mctrl(port, set, 0)
+#define uart_clear_mctrl(port, clear) uart_update_mctrl(port, 0, clear)
/*
* Startup the port. This will be called once per open. All calls
@@ -290,7 +291,7 @@ uart_update_timeout(struct uart_port *port, unsigned int cflag,
break;
default:
bits = 10;
- break; // CS8
+ break; /* CS8 */
}
if (cflag & CSTOPB)
@@ -622,7 +623,7 @@ static int uart_get_info(struct uart_state *state,
tmp.close_delay = state->close_delay / 10;
tmp.closing_wait = state->closing_wait == USF_CLOSING_WAIT_NONE ?
ASYNC_CLOSING_WAIT_NONE :
- state->closing_wait / 10;
+ state->closing_wait / 10;
tmp.custom_divisor = port->custom_divisor;
tmp.hub6 = port->hub6;
tmp.io_type = port->iotype;
@@ -788,7 +789,8 @@ static int uart_set_info(struct uart_state *state,
* We failed anyway.
*/
retval = -EBUSY;
- goto exit; // Added to return the correct error -Ram Gupta
+ /* Added to return the correct error -Ram Gupta */
+ goto exit;
}
}
@@ -858,7 +860,7 @@ static int uart_get_lsr_info(struct uart_state *state,
((uart_circ_chars_pending(&state->info->xmit) > 0) &&
!state->info->tty->stopped && !state->info->tty->hw_stopped))
result &= ~TIOCSER_TEMT;
-
+
return put_user(result, value);
}
@@ -996,8 +998,8 @@ uart_wait_modem_status(struct uart_state *state, unsigned long arg)
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
- ret = 0;
- break;
+ ret = 0;
+ break;
}
schedule();
@@ -1137,7 +1139,8 @@ uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd,
return ret;
}
-static void uart_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+static void uart_set_termios(struct tty_struct *tty,
+ struct ktermios *old_termios)
{
struct uart_state *state = tty->driver_data;
unsigned long flags;
@@ -1213,7 +1216,7 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
{
struct uart_state *state = tty->driver_data;
struct uart_port *port;
-
+
BUG_ON(!kernel_locked());
if (!state || !state->port)
@@ -1278,8 +1281,8 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
uart_shutdown(state);
uart_flush_buffer(tty);
- tty_ldisc_flush(tty);
-
+ tty_ldisc_flush(tty);
+
tty->closing = 0;
state->info->tty = NULL;
@@ -1341,7 +1344,7 @@ static void uart_wait_until_sent(struct tty_struct *tty, int timeout)
expire = jiffies + timeout;
pr_debug("uart_wait_until_sent(%d), jiffies=%lu, expire=%lu...\n",
- port->line, jiffies, expire);
+ port->line, jiffies, expire);
/*
* Check whether the transmitter is empty every 'char_time'.
@@ -1460,10 +1463,9 @@ uart_block_til_ready(struct file *filp, struct uart_state *state)
* have set TTY_IO_ERROR for a non-existant port.
*/
if ((filp->f_flags & O_NONBLOCK) ||
- (info->tty->termios->c_cflag & CLOCAL) ||
- (info->tty->flags & (1 << TTY_IO_ERROR))) {
+ (info->tty->termios->c_cflag & CLOCAL) ||
+ (info->tty->flags & (1 << TTY_IO_ERROR)))
break;
- }
/*
* Set DTR to allow modem to know we're waiting. Do
@@ -1551,8 +1553,8 @@ static struct uart_state *uart_get(struct uart_driver *drv, int line)
}
/*
- * In 2.4.5, calls to uart_open are serialised by the BKL in
- * linux/fs/devices.c:chrdev_open()
+ * calls to uart_open are serialised by the BKL in
+ * fs/char_dev.c:chrdev_open()
* Note that if this fails, then uart_close() _will_ be called.
*
* In time, we want to scrap the "opening nonpresent ports"
@@ -1674,7 +1676,7 @@ static int uart_line_info(char *buf, struct uart_driver *drv, int i)
port->line, uart_type(port),
mmio ? "mmio:0x" : "port:",
mmio ? (unsigned long long)port->mapbase
- : (unsigned long long) port->iobase,
+ : (unsigned long long) port->iobase,
port->irq);
if (port->type == PORT_UNKNOWN) {
@@ -1682,8 +1684,7 @@ static int uart_line_info(char *buf, struct uart_driver *drv, int i)
return ret + 1;
}
- if(capable(CAP_SYS_ADMIN))
- {
+ if (capable(CAP_SYS_ADMIN)) {
mutex_lock(&state->mutex);
pm_state = state->pm_state;
if (pm_state)
@@ -1709,12 +1710,12 @@ static int uart_line_info(char *buf, struct uart_driver *drv, int i)
if (port->icount.overrun)
ret += sprintf(buf + ret, " oe:%d",
port->icount.overrun);
-
-#define INFOBIT(bit,str) \
+
+#define INFOBIT(bit, str) \
if (port->mctrl & (bit)) \
strncat(stat_buf, (str), sizeof(stat_buf) - \
strlen(stat_buf) - 2)
-#define STATBIT(bit,str) \
+#define STATBIT(bit, str) \
if (status & (bit)) \
strncat(stat_buf, (str), sizeof(stat_buf) - \
strlen(stat_buf) - 2)
@@ -1730,7 +1731,7 @@ static int uart_line_info(char *buf, struct uart_driver *drv, int i)
if (stat_buf[0])
stat_buf[0] = ' ';
strcat(stat_buf, "\n");
-
+
ret += sprintf(buf + ret, stat_buf);
} else {
strcat(buf, "\n");
@@ -1992,11 +1993,11 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *port)
/*
* Wait for the transmitter to empty.
*/
- for (tries = 3; !ops->tx_empty(port) && tries; tries--) {
+ for (tries = 3; !ops->tx_empty(port) && tries; tries--)
msleep(10);
- }
if (!tries)
- printk(KERN_ERR "%s%s%s%d: Unable to drain transmitter\n",
+ printk(KERN_ERR "%s%s%s%d: Unable to drain "
+ "transmitter\n",
port->dev ? port->dev->bus_id : "",
port->dev ? ": " : "",
drv->dev_name, port->line);
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index ddf6391..9ce12cb 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -393,7 +393,7 @@ static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
if (cflag & CRTSCTS) {
fcr_val |= SCFCR_MCE;
} else {
-#ifdef CONFIG_CPU_SUBTYPE_SH7343
+#if defined(CONFIG_CPU_SUBTYPE_SH7343) || defined(CONFIG_CPU_SUBTYPE_SH7366)
/* Nothing */
#elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
defined(CONFIG_CPU_SUBTYPE_SH7780) || \
diff --git a/drivers/serial/sh-sci.h b/drivers/serial/sh-sci.h
index f5764eb..01a9dd7 100644
--- a/drivers/serial/sh-sci.h
+++ b/drivers/serial/sh-sci.h
@@ -97,13 +97,18 @@
# define SCSCR_INIT(port) 0x0038 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
# define SCIF_ONLY
# define PORT_PSCR 0xA405011E
+#elif defined(CONFIG_CPU_SUBTYPE_SH7366)
+# define SCPDR0 0xA405013E /* 16 bit SCIF0 PSDR */
+# define SCSPTR0 SCPDR0
+# define SCIF_ORER 0x0001 /* overrun error bit */
+# define SCSCR_INIT(port) 0x0038 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
+# define SCIF_ONLY
#elif defined(CONFIG_CPU_SUBTYPE_SH4_202)
# define SCSPTR2 0xffe80020 /* 16 bit SCIF */
# define SCIF_ORER 0x0001 /* overrun error bit */
# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
# define SCIF_ONLY
#elif defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103)
-# include <asm/hardware.h>
# define SCIF_BASE_ADDR 0x01030000
# define SCIF_ADDR_SH5 PHYS_PERIPHERAL_BLOCK+SCIF_BASE_ADDR
# define SCIF_PTR2_OFFS 0x0000020
@@ -577,7 +582,7 @@ static inline int sci_rxd_in(struct uart_port *port)
return ctrl_inw(SCSPTR3) & 0x0001 ? 1 : 0; /* SCIF */
return 1;
}
-#elif defined(CONFIG_CPU_SUBTYPE_SH7722)
+#elif defined(CONFIG_CPU_SUBTYPE_SH7722) || defined(CONFIG_CPU_SUBTYPE_SH7366)
static inline int sci_rxd_in(struct uart_port *port)
{
if (port->mapbase == 0xffe00000)
diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c
index 8094340..4e06ab6 100644
--- a/drivers/serial/uartlite.c
+++ b/drivers/serial/uartlite.c
@@ -17,10 +17,21 @@
#include <linux/tty.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/init.h>
#include <asm/io.h>
#if defined(CONFIG_OF)
+#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
+
+/* Match table for of_platform binding */
+static struct of_device_id ulite_of_match[] __devinitdata = {
+ { .compatible = "xlnx,opb-uartlite-1.00.b", },
+ { .compatible = "xlnx,xps-uartlite-1.00.a", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ulite_of_match);
+
#endif
#define ULITE_NAME "ttyUL"
@@ -142,7 +153,7 @@ static int ulite_transmit(struct uart_port *port, int stat)
static irqreturn_t ulite_isr(int irq, void *dev_id)
{
- struct uart_port *port = (struct uart_port *)dev_id;
+ struct uart_port *port = dev_id;
int busy;
do {
@@ -275,6 +286,9 @@ static void ulite_release_port(struct uart_port *port)
static int ulite_request_port(struct uart_port *port)
{
+ pr_debug("ulite console: port=%p; port->mapbase=%x\n",
+ port, port->mapbase);
+
if (!request_mem_region(port->mapbase, ULITE_REGION, "uartlite")) {
dev_err(port->dev, "Memory region busy\n");
return -EBUSY;
@@ -375,32 +389,6 @@ static void ulite_console_write(struct console *co, const char *s,
spin_unlock_irqrestore(&port->lock, flags);
}
-#if defined(CONFIG_OF)
-static inline void __init ulite_console_of_find_device(int id)
-{
- struct device_node *np;
- struct resource res;
- const unsigned int *of_id;
- int rc;
-
- for_each_compatible_node(np, NULL, "xilinx,uartlite") {
- of_id = of_get_property(np, "port-number", NULL);
- if ((!of_id) || (*of_id != id))
- continue;
-
- rc = of_address_to_resource(np, 0, &res);
- if (rc)
- continue;
-
- ulite_ports[id].mapbase = res.start;
- of_node_put(np);
- return;
- }
-}
-#else /* CONFIG_OF */
-static inline void __init ulite_console_of_find_device(int id) { /* do nothing */ }
-#endif /* CONFIG_OF */
-
static int __init ulite_console_setup(struct console *co, char *options)
{
struct uart_port *port;
@@ -414,11 +402,7 @@ static int __init ulite_console_setup(struct console *co, char *options)
port = &ulite_ports[co->index];
- /* Check if it is an OF device */
- if (!port->mapbase)
- ulite_console_of_find_device(co->index);
-
- /* Do we have a device now? */
+ /* Has the device been initialized yet? */
if (!port->mapbase) {
pr_debug("console on ttyUL%i not present\n", co->index);
return -ENODEV;
@@ -617,13 +601,6 @@ static int __devexit ulite_of_remove(struct of_device *op)
return ulite_release(&op->dev);
}
-/* Match table for of_platform binding */
-static struct of_device_id __devinit ulite_of_match[] = {
- { .type = "serial", .compatible = "xilinx,uartlite", },
- {},
-};
-MODULE_DEVICE_TABLE(of, ulite_of_match);
-
static struct of_platform_driver ulite_of_driver = {
.owner = THIS_MODULE,
.name = "uartlite",
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