diff options
| -rw-r--r-- | drivers/net/usb/hso.c | 329 |
1 files changed, 12 insertions, 317 deletions
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 7fde27e..af62f58 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -39,11 +39,8 @@ * port is opened, as this have a huge impact on the network port * throughput. * - * Interface 2: Standard modem interface - circuit switched interface, this - * can be used to make a standard ppp connection however it - * should not be used in conjunction with the IP network interface - * enabled for USB performance reasons i.e. if using this set - * ideally disable_net=1. + * Interface 2: Standard modem interface - circuit switched interface, should + * not be used. * *****************************************************************************/ @@ -66,8 +63,6 @@ #include <linux/usb/cdc.h> #include <net/arp.h> #include <asm/byteorder.h> -#include <linux/serial_core.h> -#include <linux/serial.h> #define DRIVER_VERSION "1.2" @@ -187,41 +182,6 @@ enum rx_ctrl_state{ RX_PENDING }; -#define BM_REQUEST_TYPE (0xa1) -#define B_NOTIFICATION (0x20) -#define W_VALUE (0x0) -#define W_INDEX (0x2) -#define W_LENGTH (0x2) - -#define B_OVERRUN (0x1<<6) -#define B_PARITY (0x1<<5) -#define B_FRAMING (0x1<<4) -#define B_RING_SIGNAL (0x1<<3) -#define B_BREAK (0x1<<2) -#define B_TX_CARRIER (0x1<<1) -#define B_RX_CARRIER (0x1<<0) - -struct hso_serial_state_notification { - u8 bmRequestType; - u8 bNotification; - u16 wValue; - u16 wIndex; - u16 wLength; - u16 UART_state_bitmap; -} __attribute__((packed)); - -struct hso_tiocmget { - struct mutex mutex; - wait_queue_head_t waitq; - int intr_completed; - struct usb_endpoint_descriptor *endp; - struct urb *urb; - struct hso_serial_state_notification serial_state_notification; - u16 prev_UART_state_bitmap; - struct uart_icount icount; -}; - - struct hso_serial { struct hso_device *parent; int magic; @@ -259,7 +219,6 @@ struct hso_serial { spinlock_t serial_lock; int (*write_data) (struct hso_serial *serial); - struct hso_tiocmget *tiocmget; /* Hacks required to get flow control * working on the serial receive buffers * so as not to drop characters on the floor. @@ -351,7 +310,7 @@ static void async_get_intf(struct work_struct *data); static void async_put_intf(struct work_struct *data); static int hso_put_activity(struct hso_device *hso_dev); static int hso_get_activity(struct hso_device *hso_dev); -static void tiocmget_intr_callback(struct urb *urb); + /*****************************************************************************/ /* Helping functions */ /*****************************************************************************/ @@ -1501,217 +1460,25 @@ static int hso_serial_chars_in_buffer(struct tty_struct *tty) return chars; } -int tiocmget_submit_urb(struct hso_serial *serial, - struct hso_tiocmget *tiocmget, - struct usb_device *usb) -{ - int result; - - if (serial->parent->usb_gone) - return -ENODEV; - usb_fill_int_urb(tiocmget->urb, usb, - usb_rcvintpipe(usb, - tiocmget->endp-> - bEndpointAddress & 0x7F), - &tiocmget->serial_state_notification, - sizeof(struct hso_serial_state_notification), - tiocmget_intr_callback, serial, - tiocmget->endp->bInterval); - result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); - if (result) { - dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, - result); - } - return result; - -} - -static void tiocmget_intr_callback(struct urb *urb) -{ - struct hso_serial *serial = urb->context; - struct hso_tiocmget *tiocmget; - int status = urb->status; - u16 UART_state_bitmap, prev_UART_state_bitmap; - struct uart_icount *icount; - struct hso_serial_state_notification *serial_state_notification; - struct usb_device *usb; - - /* Sanity checks */ - if (!serial) - return; - if (status) { - log_usb_status(status, __func__); - return; - } - tiocmget = serial->tiocmget; - if (!tiocmget) - return; - usb = serial->parent->usb; - serial_state_notification = &tiocmget->serial_state_notification; - if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || - serial_state_notification->bNotification != B_NOTIFICATION || - le16_to_cpu(serial_state_notification->wValue) != W_VALUE || - le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || - le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { - dev_warn(&usb->dev, - "hso received invalid serial state notification\n"); - DUMP(serial_state_notification, - sizeof(hso_serial_state_notifation)) - } else { - - UART_state_bitmap = le16_to_cpu(serial_state_notification-> - UART_state_bitmap); - prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; - icount = &tiocmget->icount; - spin_lock(&serial->serial_lock); - if ((UART_state_bitmap & B_OVERRUN) != - (prev_UART_state_bitmap & B_OVERRUN)) - icount->parity++; - if ((UART_state_bitmap & B_PARITY) != - (prev_UART_state_bitmap & B_PARITY)) - icount->parity++; - if ((UART_state_bitmap & B_FRAMING) != - (prev_UART_state_bitmap & B_FRAMING)) - icount->frame++; - if ((UART_state_bitmap & B_RING_SIGNAL) && - !(prev_UART_state_bitmap & B_RING_SIGNAL)) - icount->rng++; - if ((UART_state_bitmap & B_BREAK) != - (prev_UART_state_bitmap & B_BREAK)) - icount->brk++; - if ((UART_state_bitmap & B_TX_CARRIER) != - (prev_UART_state_bitmap & B_TX_CARRIER)) - icount->dsr++; - if ((UART_state_bitmap & B_RX_CARRIER) != - (prev_UART_state_bitmap & B_RX_CARRIER)) - icount->dcd++; - tiocmget->prev_UART_state_bitmap = UART_state_bitmap; - spin_unlock(&serial->serial_lock); - tiocmget->intr_completed = 1; - wake_up_interruptible(&tiocmget->waitq); - } - memset(serial_state_notification, 0, - sizeof(struct hso_serial_state_notification)); - tiocmget_submit_urb(serial, - tiocmget, - serial->parent->usb); -} - -/* - * next few functions largely stolen from drivers/serial/serial_core.c - */ -/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change - * - mask passed in arg for lines of interest - * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) - * Caller should use TIOCGICOUNT to see which one it was - */ -static int -hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) -{ - DECLARE_WAITQUEUE(wait, current); - struct uart_icount cprev, cnow; - struct hso_tiocmget *tiocmget; - int ret; - - tiocmget = serial->tiocmget; - if (!tiocmget) - return -ENOENT; - /* - * note the counters on entry - */ - spin_lock_irq(&serial->serial_lock); - memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); - spin_unlock_irq(&serial->serial_lock); - add_wait_queue(&tiocmget->waitq, &wait); - for (;;) { - spin_lock_irq(&serial->serial_lock); - memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); - spin_unlock_irq(&serial->serial_lock); - set_current_state(TASK_INTERRUPTIBLE); - if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || - ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || - ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { - ret = 0; - break; - } - schedule(); - /* see if a signal did it */ - if (signal_pending(current)) { - ret = -ERESTARTSYS; - break; - } - cprev = cnow; - } - current->state = TASK_RUNNING; - remove_wait_queue(&tiocmget->waitq, &wait); - - return ret; -} - -/* - * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) - * Return: write counters to the user passed counter struct - * NB: both 1->0 and 0->1 transitions are counted except for - * RI where only 0->1 is counted. - */ -static int hso_get_count(struct hso_serial *serial, - struct serial_icounter_struct __user *icnt) -{ - struct serial_icounter_struct icount; - struct uart_icount cnow; - struct hso_tiocmget *tiocmget = serial->tiocmget; - - if (!tiocmget) - return -ENOENT; - spin_lock_irq(&serial->serial_lock); - memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); - spin_unlock_irq(&serial->serial_lock); - - icount.cts = cnow.cts; - icount.dsr = cnow.dsr; - icount.rng = cnow.rng; - icount.dcd = cnow.dcd; - icount.rx = cnow.rx; - icount.tx = cnow.tx; - icount.frame = cnow.frame; - icount.overrun = cnow.overrun; - icount.parity = cnow.parity; - icount.brk = cnow.brk; - icount.buf_overrun = cnow.buf_overrun; - - return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; -} - static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) { - int retval; + unsigned int value; struct hso_serial *serial = get_serial_by_tty(tty); - struct hso_tiocmget *tiocmget; - u16 UART_state_bitmap; + unsigned long flags; /* sanity check */ if (!serial) { D1("no tty structures"); return -EINVAL; } - spin_lock_irq(&serial->serial_lock); - retval = ((serial->rts_state) ? TIOCM_RTS : 0) | + + spin_lock_irqsave(&serial->serial_lock, flags); + value = ((serial->rts_state) ? TIOCM_RTS : 0) | ((serial->dtr_state) ? TIOCM_DTR : 0); - tiocmget = serial->tiocmget; - if (tiocmget) { + spin_unlock_irqrestore(&serial->serial_lock, flags); - UART_state_bitmap = le16_to_cpu( - tiocmget->prev_UART_state_bitmap); - if (UART_state_bitmap & B_RING_SIGNAL) - retval |= TIOCM_RNG; - if (UART_state_bitmap & B_RX_CARRIER) - retval |= TIOCM_CD; - if (UART_state_bitmap & B_TX_CARRIER) - retval |= TIOCM_DSR; - } - spin_unlock_irq(&serial->serial_lock); - return retval; + return value; } static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, @@ -1753,32 +1520,6 @@ static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, USB_CTRL_SET_TIMEOUT); } -static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct hso_serial *serial = get_serial_by_tty(tty); - void __user *uarg = (void __user *)arg; - int ret = 0; - D4("IOCTL cmd: %d, arg: %ld", cmd, arg); - - if (!serial) - return -ENODEV; - switch (cmd) { - case TIOCMIWAIT: - ret = hso_wait_modem_status(serial, arg); - break; - - case TIOCGICOUNT: - ret = hso_get_count(serial, uarg); - break; - default: - ret = -ENOIOCTLCMD; - break; - } - return ret; -} - - /* starts a transmit */ static void hso_kick_transmit(struct hso_serial *serial) { @@ -2241,10 +1982,7 @@ static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) serial->shared_int->use_count++; mutex_unlock(&serial->shared_int->shared_int_lock); } - if (serial->tiocmget) - tiocmget_submit_urb(serial, - serial->tiocmget, - serial->parent->usb); + return result; } @@ -2252,7 +1990,6 @@ static int hso_stop_serial_device(struct hso_device *hso_dev) { int i; struct hso_serial *serial = dev2ser(hso_dev); - struct hso_tiocmget *tiocmget; if (!serial) return -ENODEV; @@ -2281,11 +2018,6 @@ static int hso_stop_serial_device(struct hso_device *hso_dev) } mutex_unlock(&serial->shared_int->shared_int_lock); } - tiocmget = serial->tiocmget; - if (tiocmget) { - wake_up_interruptible(&tiocmget->waitq); - usb_kill_urb(tiocmget->urb); - } return 0; } @@ -2636,20 +2368,6 @@ exit: return NULL; } -static void hso_free_tiomget(struct hso_serial *serial) -{ - struct hso_tiocmget *tiocmget = serial->tiocmget; - if (tiocmget) { - kfree(tiocmget); - if (tiocmget->urb) { - usb_free_urb(tiocmget->urb); - tiocmget->urb = NULL; - } - serial->tiocmget = NULL; - - } -} - /* Frees an AT channel ( goes for both mux and non-mux ) */ static void hso_free_serial_device(struct hso_device *hso_dev) { @@ -2668,7 +2386,6 @@ static void hso_free_serial_device(struct hso_device *hso_dev) else mutex_unlock(&serial->shared_int->shared_int_lock); } - hso_free_tiomget(serial); kfree(serial); hso_free_device(hso_dev); } @@ -2680,7 +2397,6 @@ static struct hso_device *hso_create_bulk_serial_device( struct hso_device *hso_dev; struct hso_serial *serial; int num_urbs; - struct hso_tiocmget *tiocmget; hso_dev = hso_create_device(interface, port); if (!hso_dev) @@ -2693,27 +2409,8 @@ static struct hso_device *hso_create_bulk_serial_device( serial->parent = hso_dev; hso_dev->port_data.dev_serial = serial; - if (port & HSO_PORT_MODEM) { + if (port & HSO_PORT_MODEM) num_urbs = 2; - serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), - GFP_KERNEL); - /* it isn't going to break our heart if serial->tiocmget - * allocation fails don't bother checking this. - */ - if (serial->tiocmget) { - tiocmget = serial->tiocmget; - tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); - if (tiocmget->urb) { - mutex_init(&tiocmget->mutex); - init_waitqueue_head(&tiocmget->waitq); - tiocmget->endp = hso_get_ep( - interface, - USB_ENDPOINT_XFER_INT, - USB_DIR_IN); - } else - hso_free_tiomget(serial); - } - } else num_urbs = 1; @@ -2749,7 +2446,6 @@ static struct hso_device *hso_create_bulk_serial_device( exit2: hso_serial_common_free(serial); exit: - hso_free_tiomget(serial); kfree(serial); hso_free_device(hso_dev); return NULL; @@ -3262,7 +2958,6 @@ static const struct tty_operations hso_serial_ops = { .close = hso_serial_close, .write = hso_serial_write, .write_room = hso_serial_write_room, - .ioctl = hso_serial_ioctl, .set_termios = hso_serial_set_termios, .chars_in_buffer = hso_serial_chars_in_buffer, .tiocmget = hso_serial_tiocmget, |
