diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/digi_acceleport.c | 344 |
1 files changed, 184 insertions, 160 deletions
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index dc92dbfc962e..240aad1acaab 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -241,7 +241,7 @@ #include <linux/module.h> #include <linux/spinlock.h> #include <linux/workqueue.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include <linux/usb.h> #include <linux/wait.h> #include <linux/usb/serial.h> @@ -441,8 +441,8 @@ static int digi_set_modem_signals(struct usb_serial_port *port, unsigned int modem_signals, int interruptible); static int digi_transmit_idle(struct usb_serial_port *port, unsigned long timeout); -static void digi_rx_throttle (struct tty_struct *tty); -static void digi_rx_unthrottle (struct tty_struct *tty); +static void digi_rx_throttle(struct tty_struct *tty); +static void digi_rx_unthrottle(struct tty_struct *tty); static void digi_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios); static void digi_break_ctl(struct tty_struct *tty, int break_state); @@ -486,7 +486,7 @@ static struct usb_device_id id_table_4 [] = { { } /* Terminating entry */ }; -MODULE_DEVICE_TABLE (usb, id_table_combined); +MODULE_DEVICE_TABLE(usb, id_table_combined); static struct usb_driver digi_driver = { .name = "digi_acceleport", @@ -555,17 +555,17 @@ static struct usb_serial_driver digi_acceleport_4_device = { /* Functions */ /* -* Cond Wait Interruptible Timeout Irqrestore -* -* Do spin_unlock_irqrestore and interruptible_sleep_on_timeout -* so that wake ups are not lost if they occur between the unlock -* and the sleep. In other words, spin_unlock_irqrestore and -* interruptible_sleep_on_timeout are "atomic" with respect to -* wake ups. This is used to implement condition variables. -* -* interruptible_sleep_on_timeout is deprecated and has been replaced -* with the equivalent code. -*/ + * Cond Wait Interruptible Timeout Irqrestore + * + * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout + * so that wake ups are not lost if they occur between the unlock + * and the sleep. In other words, spin_unlock_irqrestore and + * interruptible_sleep_on_timeout are "atomic" with respect to + * wake ups. This is used to implement condition variables. + * + * interruptible_sleep_on_timeout is deprecated and has been replaced + * with the equivalent code. + */ static long cond_wait_interruptible_timeout_irqrestore( wait_queue_head_t *q, long timeout, @@ -584,15 +584,16 @@ __releases(lock) /* -* Digi Wakeup Write -* -* Wake up port, line discipline, and tty processes sleeping -* on writes. -*/ + * Digi Wakeup Write + * + * Wake up port, line discipline, and tty processes sleeping + * on writes. + */ static void digi_wakeup_write_lock(struct work_struct *work) { - struct digi_port *priv = container_of(work, struct digi_port, dp_wakeup_work); + struct digi_port *priv = + container_of(work, struct digi_port, dp_wakeup_work); struct usb_serial_port *port = priv->dp_port; unsigned long flags; @@ -608,15 +609,15 @@ static void digi_wakeup_write(struct usb_serial_port *port) /* -* Digi Write OOB Command -* -* Write commands on the out of band port. Commands are 4 -* bytes each, multiple commands can be sent at once, and -* no command will be split across USB packets. Returns 0 -* if successful, -EINTR if interrupted while sleeping and -* the interruptible flag is true, or a negative error -* returned by usb_submit_urb. -*/ + * Digi Write OOB Command + * + * Write commands on the out of band port. Commands are 4 + * bytes each, multiple commands can be sent at once, and + * no command will be split across USB packets. Returns 0 + * if successful, -EINTR if interrupted while sleeping and + * the interruptible flag is true, or a negative error + * returned by usb_submit_urb. + */ static int digi_write_oob_command(struct usb_serial_port *port, unsigned char *buf, int count, int interruptible) @@ -631,8 +632,8 @@ static int digi_write_oob_command(struct usb_serial_port *port, dbg("digi_write_oob_command: TOP: port=%d, count=%d", oob_priv->dp_port_num, count); spin_lock_irqsave(&oob_priv->dp_port_lock, flags); - while(count > 0) { - while(oob_port->write_urb->status == -EINPROGRESS + while (count > 0) { + while (oob_port->write_urb->status == -EINPROGRESS || oob_priv->dp_write_urb_in_use) { cond_wait_interruptible_timeout_irqrestore( &oob_port->write_wait, DIGI_RETRY_TIMEOUT, @@ -649,7 +650,8 @@ static int digi_write_oob_command(struct usb_serial_port *port, memcpy(oob_port->write_urb->transfer_buffer, buf, len); oob_port->write_urb->transfer_buffer_length = len; oob_port->write_urb->dev = port->serial->dev; - if ((ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC)) == 0) { + ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); + if (ret == 0) { oob_priv->dp_write_urb_in_use = 1; count -= len; buf += len; @@ -664,16 +666,16 @@ static int digi_write_oob_command(struct usb_serial_port *port, /* -* Digi Write In Band Command -* -* Write commands on the given port. Commands are 4 -* bytes each, multiple commands can be sent at once, and -* no command will be split across USB packets. If timeout -* is non-zero, write in band command will return after -* waiting unsuccessfully for the URB status to clear for -* timeout ticks. Returns 0 if successful, or a negative -* error returned by digi_write. -*/ + * Digi Write In Band Command + * + * Write commands on the given port. Commands are 4 + * bytes each, multiple commands can be sent at once, and + * no command will be split across USB packets. If timeout + * is non-zero, write in band command will return after + * waiting unsuccessfully for the URB status to clear for + * timeout ticks. Returns 0 if successful, or a negative + * error returned by digi_write. + */ static int digi_write_inb_command(struct usb_serial_port *port, unsigned char *buf, int count, unsigned long timeout) @@ -693,9 +695,10 @@ static int digi_write_inb_command(struct usb_serial_port *port, timeout = ULONG_MAX; spin_lock_irqsave(&priv->dp_port_lock, flags); - while(count > 0 && ret == 0) { - while((port->write_urb->status == -EINPROGRESS - || priv->dp_write_urb_in_use) && time_before(jiffies, timeout)) { + while (count > 0 && ret == 0) { + while ((port->write_urb->status == -EINPROGRESS + || priv->dp_write_urb_in_use) + && time_before(jiffies, timeout)) { cond_wait_interruptible_timeout_irqrestore( &port->write_wait, DIGI_RETRY_TIMEOUT, &priv->dp_port_lock, flags); @@ -726,7 +729,8 @@ static int digi_write_inb_command(struct usb_serial_port *port, } port->write_urb->dev = port->serial->dev; - if ((ret = usb_submit_urb(port->write_urb, GFP_ATOMIC)) == 0) { + ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); + if (ret == 0) { priv->dp_write_urb_in_use = 1; priv->dp_out_buf_len = 0; count -= len; @@ -744,14 +748,14 @@ static int digi_write_inb_command(struct usb_serial_port *port, /* -* Digi Set Modem Signals -* -* Sets or clears DTR and RTS on the port, according to the -* modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags -* for the modem_signals argument. Returns 0 if successful, -* -EINTR if interrupted while sleeping, or a non-zero error -* returned by usb_submit_urb. -*/ + * Digi Set Modem Signals + * + * Sets or clears DTR and RTS on the port, according to the + * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags + * for the modem_signals argument. Returns 0 if successful, + * -EINTR if interrupted while sleeping, or a non-zero error + * returned by usb_submit_urb. + */ static int digi_set_modem_signals(struct usb_serial_port *port, unsigned int modem_signals, int interruptible) @@ -759,7 +763,7 @@ static int digi_set_modem_signals(struct usb_serial_port *port, int ret; struct digi_port *port_priv = usb_get_serial_port_data(port); - struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; + struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); unsigned char *data = oob_port->write_urb->transfer_buffer; unsigned long flags = 0; @@ -771,7 +775,8 @@ static int digi_set_modem_signals(struct usb_serial_port *port, spin_lock_irqsave(&oob_priv->dp_port_lock, flags); spin_lock(&port_priv->dp_port_lock); - while(oob_port->write_urb->status == -EINPROGRESS || oob_priv->dp_write_urb_in_use) { + while (oob_port->write_urb->status == -EINPROGRESS || + oob_priv->dp_write_urb_in_use) { spin_unlock(&port_priv->dp_port_lock); cond_wait_interruptible_timeout_irqrestore( &oob_port->write_wait, DIGI_RETRY_TIMEOUT, @@ -783,17 +788,20 @@ static int digi_set_modem_signals(struct usb_serial_port *port, } data[0] = DIGI_CMD_SET_DTR_SIGNAL; data[1] = port_priv->dp_port_num; - data[2] = (modem_signals&TIOCM_DTR) ? DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; + data[2] = (modem_signals & TIOCM_DTR) ? + DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; data[3] = 0; data[4] = DIGI_CMD_SET_RTS_SIGNAL; data[5] = port_priv->dp_port_num; - data[6] = (modem_signals&TIOCM_RTS) ? DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; + data[6] = (modem_signals & TIOCM_RTS) ? + DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; data[7] = 0; oob_port->write_urb->transfer_buffer_length = 8; oob_port->write_urb->dev = port->serial->dev; - if ((ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC)) == 0) { + ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); + if (ret == 0) { oob_priv->dp_write_urb_in_use = 1; port_priv->dp_modem_signals = (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) @@ -807,16 +815,16 @@ static int digi_set_modem_signals(struct usb_serial_port *port, } /* -* Digi Transmit Idle -* -* Digi transmit idle waits, up to timeout ticks, for the transmitter -* to go idle. It returns 0 if successful or a negative error. -* -* There are race conditions here if more than one process is calling -* digi_transmit_idle on the same port at the same time. However, this -* is only called from close, and only one process can be in close on a -* port at a time, so its ok. -*/ + * Digi Transmit Idle + * + * Digi transmit idle waits, up to timeout ticks, for the transmitter + * to go idle. It returns 0 if successful or a negative error. + * + * There are race conditions here if more than one process is calling + * digi_transmit_idle on the same port at the same time. However, this + * is only called from close, and only one process can be in close on a + * port at a time, so its ok. + */ static int digi_transmit_idle(struct usb_serial_port *port, unsigned long timeout) @@ -835,12 +843,13 @@ static int digi_transmit_idle(struct usb_serial_port *port, timeout += jiffies; - if ((ret = digi_write_inb_command(port, buf, 2, timeout - jiffies)) != 0) + ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); + if (ret != 0) return ret; spin_lock_irqsave(&priv->dp_port_lock, flags); - while(time_before(jiffies, timeout) && !priv->dp_transmit_idle) { + while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { cond_wait_interruptible_timeout_irqrestore( &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, &priv->dp_port_lock, flags); @@ -901,7 +910,7 @@ static void digi_rx_unthrottle(struct tty_struct *tty) } -static void digi_set_termios(struct tty_struct *tty, +static void digi_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { struct digi_port *priv = usb_get_serial_port_data(port); @@ -911,14 +920,15 @@ static void digi_set_termios(struct tty_struct *tty, unsigned int old_cflag = old_termios->c_cflag; unsigned char buf[32]; unsigned int modem_signals; - int arg,ret; + int arg, ret; int i = 0; speed_t baud; dbg("digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x", priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); /* set baud rate */ - if ((baud = tty_get_baud_rate(tty)) != tty_termios_baud_rate(old_termios)) { + baud = tty_get_baud_rate(tty); + if (baud != tty_termios_baud_rate(old_termios)) { arg = -1; /* reassert DTR and (maybe) RTS on transition from B0 */ @@ -932,30 +942,30 @@ static void digi_set_termios(struct tty_struct *tty, digi_set_modem_signals(port, modem_signals, 1); } switch (baud) { - /* drop DTR and RTS on transition to B0 */ - case 0: digi_set_modem_signals(port, 0, 1); break; - case 50: arg = DIGI_BAUD_50; break; - case 75: arg = DIGI_BAUD_75; break; - case 110: arg = DIGI_BAUD_110; break; - case 150: arg = DIGI_BAUD_150; break; - case 200: arg = DIGI_BAUD_200; break; - case 300: arg = DIGI_BAUD_300; break; - case 600: arg = DIGI_BAUD_600; break; - case 1200: arg = DIGI_BAUD_1200; break; - case 1800: arg = DIGI_BAUD_1800; break; - case 2400: arg = DIGI_BAUD_2400; break; - case 4800: arg = DIGI_BAUD_4800; break; - case 9600: arg = DIGI_BAUD_9600; break; - case 19200: arg = DIGI_BAUD_19200; break; - case 38400: arg = DIGI_BAUD_38400; break; - case 57600: arg = DIGI_BAUD_57600; break; - case 115200: arg = DIGI_BAUD_115200; break; - case 230400: arg = DIGI_BAUD_230400; break; - case 460800: arg = DIGI_BAUD_460800; break; - default: - arg = DIGI_BAUD_9600; - baud = 9600; - break; + /* drop DTR and RTS on transition to B0 */ + case 0: digi_set_modem_signals(port, 0, 1); break; + case 50: arg = DIGI_BAUD_50; break; + case 75: arg = DIGI_BAUD_75; break; + case 110: arg = DIGI_BAUD_110; break; + case 150: arg = DIGI_BAUD_150; break; + case 200: arg = DIGI_BAUD_200; break; + case 300: arg = DIGI_BAUD_300; break; + case 600: arg = DIGI_BAUD_600; break; + case 1200: arg = DIGI_BAUD_1200; break; + case 1800: arg = DIGI_BAUD_1800; break; + case 2400: arg = DIGI_BAUD_2400; break; + case 4800: arg = DIGI_BAUD_4800; break; + case 9600: arg = DIGI_BAUD_9600; break; + case 19200: arg = DIGI_BAUD_19200; break; + case 38400: arg = DIGI_BAUD_38400; break; + case 57600: arg = DIGI_BAUD_57600; break; + case 115200: arg = DIGI_BAUD_115200; break; + case 230400: arg = DIGI_BAUD_230400; break; + case 460800: arg = DIGI_BAUD_460800; break; + default: + arg = DIGI_BAUD_9600; + baud = 9600; + break; } if (arg != -1) { buf[i++] = DIGI_CMD_SET_BAUD_RATE; @@ -1081,7 +1091,8 @@ static void digi_set_termios(struct tty_struct *tty, buf[i++] = arg; buf[i++] = 0; } - if ((ret = digi_write_oob_command(port, buf, i, 1)) != 0) + ret = digi_write_oob_command(port, buf, i, 1); + if (ret != 0) dbg("digi_set_termios: write oob failed, ret=%d", ret); tty_encode_baud_rate(tty, baud, baud); } @@ -1137,7 +1148,7 @@ static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count) { - int ret,data_len,new_len; + int ret, data_len, new_len; struct digi_port *priv = usb_get_serial_port_data(port); unsigned char *data = port->write_urb->transfer_buffer; unsigned long flags = 0; @@ -1155,7 +1166,8 @@ static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, spin_lock_irqsave(&priv->dp_port_lock, flags); /* wait for urb status clear to submit another urb */ - if (port->write_urb->status == -EINPROGRESS || priv->dp_write_urb_in_use) { + if (port->write_urb->status == -EINPROGRESS || + priv->dp_write_urb_in_use) { /* buffer data if count is 1 (probably put_char) if possible */ if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; @@ -1190,7 +1202,8 @@ static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, /* copy in new data */ memcpy(data, buf, new_len); - if ((ret = usb_submit_urb(port->write_urb, GFP_ATOMIC)) == 0) { + ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); + if (ret == 0) { priv->dp_write_urb_in_use = 1; ret = new_len; priv->dp_out_buf_len = 0; @@ -1204,7 +1217,7 @@ static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, dbg("digi_write: returning %d", ret); return ret; -} +} static void digi_write_bulk_callback(struct urb *urb) { @@ -1219,13 +1232,13 @@ static void digi_write_bulk_callback(struct urb *urb) dbg("digi_write_bulk_callback: TOP, urb->status=%d", status); /* port and serial sanity check */ - if (port == NULL || (priv=usb_get_serial_port_data(port)) == NULL) { + if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { err("%s: port or port->private is NULL, status=%d", __func__, status); return; } serial = port->serial; - if (serial == NULL || (serial_priv=usb_get_serial_data(serial)) == NULL) { + if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { err("%s: serial or serial->private is NULL, status=%d", __func__, status); return; @@ -1248,13 +1261,15 @@ static void digi_write_bulk_callback(struct urb *urb) && priv->dp_out_buf_len > 0) { *((unsigned char *)(port->write_urb->transfer_buffer)) = (unsigned char)DIGI_CMD_SEND_DATA; - *((unsigned char *)(port->write_urb->transfer_buffer)+1) + *((unsigned char *)(port->write_urb->transfer_buffer) + 1) = (unsigned char)priv->dp_out_buf_len; - port->write_urb->transfer_buffer_length = priv->dp_out_buf_len+2; + port->write_urb->transfer_buffer_length = + priv->dp_out_buf_len + 2; port->write_urb->dev = serial->dev; - memcpy(port->write_urb->transfer_buffer+2, priv->dp_out_buf, + memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, priv->dp_out_buf_len); - if ((ret = usb_submit_urb(port->write_urb, GFP_ATOMIC)) == 0) { + ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); + if (ret == 0) { priv->dp_write_urb_in_use = 1; priv->dp_out_buf_len = 0; } @@ -1280,7 +1295,8 @@ static int digi_write_room(struct tty_struct *tty) spin_lock_irqsave(&priv->dp_port_lock, flags); - if (port->write_urb->status == -EINPROGRESS || priv->dp_write_urb_in_use) + if (port->write_urb->status == -EINPROGRESS || + priv->dp_write_urb_in_use) room = 0; else room = port->bulk_out_size - 2 - priv->dp_out_buf_len; @@ -1336,7 +1352,7 @@ static int digi_open(struct tty_struct *tty, struct usb_serial_port *port, } /* wait for a close in progress to finish */ - while(priv->dp_in_close) { + while (priv->dp_in_close) { cond_wait_interruptible_timeout_irqrestore( &priv->dp_close_wait, DIGI_RETRY_TIMEOUT, &priv->dp_port_lock, flags); @@ -1346,7 +1362,7 @@ static int digi_open(struct tty_struct *tty, struct usb_serial_port *port, } spin_unlock_irqrestore(&priv->dp_port_lock, flags); - + /* read modem signals automatically whenever they change */ buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; buf[1] = priv->dp_port_num; @@ -1359,7 +1375,8 @@ static int digi_open(struct tty_struct *tty, struct usb_serial_port *port, buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; buf[7] = 0; - if ((ret = digi_write_oob_command(port, buf, 8, 1)) != 0) + ret = digi_write_oob_command(port, buf, 8, 1); + if (ret != 0) dbg("digi_open: write oob failed, ret=%d", ret); /* set termios settings */ @@ -1410,9 +1427,8 @@ static void digi_close(struct tty_struct *tty, struct usb_serial_port *port, if (port->serial->dev) { /* wait for transmit idle */ - if ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0) { + if ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0) digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); - } /* drop DTR and RTS */ digi_set_modem_signals(port, 0, 0); @@ -1446,11 +1462,13 @@ static void digi_close(struct tty_struct *tty, struct usb_serial_port *port, buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; buf[19] = 0; - if ((ret = digi_write_oob_command(port, buf, 20, 0)) != 0) + ret = digi_write_oob_command(port, buf, 20, 0); + if (ret != 0) dbg("digi_close: write oob failed, ret=%d", ret); /* wait for final commands on oob port to complete */ - prepare_to_wait(&priv->dp_flush_wait, &wait, TASK_INTERRUPTIBLE); + prepare_to_wait(&priv->dp_flush_wait, &wait, + TASK_INTERRUPTIBLE); schedule_timeout(DIGI_CLOSE_TIMEOUT); finish_wait(&priv->dp_flush_wait, &wait); @@ -1470,15 +1488,15 @@ exit: /* -* Digi Startup Device -* -* Starts reads on all ports. Must be called AFTER startup, with -* urbs initialized. Returns 0 if successful, non-zero error otherwise. -*/ + * Digi Startup Device + * + * Starts reads on all ports. Must be called AFTER startup, with + * urbs initialized. Returns 0 if successful, non-zero error otherwise. + */ static int digi_startup_device(struct usb_serial *serial) { - int i,ret = 0; + int i, ret = 0; struct digi_serial *serial_priv = usb_get_serial_data(serial); struct usb_serial_port *port; @@ -1496,7 +1514,8 @@ static int digi_startup_device(struct usb_serial *serial) for (i = 0; i < serial->type->num_ports + 1; i++) { port = serial->port[i]; port->write_urb->dev = port->serial->dev; - if ((ret = usb_submit_urb(port->read_urb, GFP_KERNEL)) != 0) { + ret = usb_submit_urb(port->read_urb, GFP_KERNEL); + if (ret != 0) { err("%s: usb_submit_urb failed, ret=%d, port=%d", __func__, ret, i); break; @@ -1517,7 +1536,7 @@ static int digi_startup(struct usb_serial *serial) /* allocate the private data structures for all ports */ /* number of regular ports + 1 for the out-of-band port */ - for(i = 0; i < serial->type->num_ports + 1; i++) { + for (i = 0; i < serial->type->num_ports + 1; i++) { /* allocate port private structure */ priv = kmalloc(sizeof(struct digi_port), GFP_KERNEL); if (priv == NULL) { @@ -1580,7 +1599,7 @@ static void digi_shutdown(struct usb_serial *serial) /* free the private data structures for all ports */ /* number of regular ports + 1 for the out-of-band port */ - for(i = 0; i < serial->type->num_ports + 1; i++) + for (i = 0; i < serial->type->num_ports + 1; i++) kfree(usb_get_serial_port_data(serial->port[i])); kfree(usb_get_serial_data(serial)); } @@ -1603,7 +1622,7 @@ static void digi_read_bulk_callback(struct urb *urb) return; } if (port->serial == NULL || - (serial_priv=usb_get_serial_data(port->serial)) == NULL) { + (serial_priv = usb_get_serial_data(port->serial)) == NULL) { err("%s: serial is bad or serial->private is NULL, status=%d", __func__, status); return; @@ -1627,22 +1646,23 @@ static void digi_read_bulk_callback(struct urb *urb) /* continue read */ urb->dev = port->serial->dev; - if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) != 0) { + ret = usb_submit_urb(urb, GFP_ATOMIC); + if (ret != 0) { err("%s: failed resubmitting urb, ret=%d, port=%d", __func__, ret, priv->dp_port_num); } } -/* -* Digi Read INB Callback -* -* Digi Read INB Callback handles reads on the in band ports, sending -* the data on to the tty subsystem. When called we know port and -* port->private are not NULL and port->serial has been validated. -* It returns 0 if successful, 1 if successful but the port is -* throttled, and -1 if the sanity checks failed. -*/ +/* + * Digi Read INB Callback + * + * Digi Read INB Callback handles reads on the in band ports, sending + * the data on to the tty subsystem. When called we know port and + * port->private are not NULL and port->serial has been validated. + * It returns 0 if successful, 1 if successful but the port is + * throttled, and -1 if the sanity checks failed. + */ static int digi_read_inb_callback(struct urb *urb) { @@ -1653,8 +1673,8 @@ static int digi_read_inb_callback(struct urb *urb) int opcode = ((unsigned char *)urb->transfer_buffer)[0]; int len = ((unsigned char *)urb->transfer_buffer)[1]; int port_status = ((unsigned char *)urb->transfer_buffer)[2]; - unsigned char *data = ((unsigned char *)urb->transfer_buffer)+3; - int flag,throttled; + unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3; + int flag, throttled; int i; int status = urb->status; @@ -1665,7 +1685,7 @@ static int digi_read_inb_callback(struct urb *urb) /* short/multiple packet check */ if (urb->actual_length != len + 2) { - err("%s: INCOMPLETE OR MULTIPLE PACKET, urb->status=%d, " + err("%s: INCOMPLETE OR MULTIPLE PACKET, urb->status=%d, " "port=%d, opcode=%d, len=%d, actual_length=%d, " "status=%d", __func__, status, priv->dp_port_num, opcode, len, urb->actual_length, port_status); @@ -1707,8 +1727,9 @@ static int digi_read_inb_callback(struct urb *urb) if (flag == TTY_NORMAL) tty_insert_flip_string(tty, data, len); else { - for(i = 0; i < len; i++) - tty_insert_flip_char(tty, data[i], flag); + for (i = 0; i < len; i++) + tty_insert_flip_char(tty, + data[i], flag); } tty_flip_buffer_push(tty); } @@ -1720,19 +1741,19 @@ static int digi_read_inb_callback(struct urb *urb) else if (opcode != DIGI_CMD_RECEIVE_DATA) dbg("%s: unknown opcode: %d", __func__, opcode); - return(throttled ? 1 : 0); + return throttled ? 1 : 0; } -/* -* Digi Read OOB Callback -* -* Digi Read OOB Callback handles reads on the out of band port. -* When called we know port and port->private are not NULL and -* the port->serial is valid. It returns 0 if successful, and -* -1 if the sanity checks failed. -*/ +/* + * Digi Read OOB Callback + * + * Digi Read OOB Callback handles reads on the out of band port. + * When called we know port and port->private are not NULL and + * the port->serial is valid. It returns 0 if successful, and + * -1 if the sanity checks failed. + */ static int digi_read_oob_callback(struct urb *urb) { @@ -1742,12 +1763,13 @@ static int digi_read_oob_callback(struct urb *urb) struct digi_port *priv = usb_get_serial_port_data(port); int opcode, line, status, val; int i; + unsigned int rts; dbg("digi_read_oob_callback: port=%d, len=%d", priv->dp_port_num, urb->actual_length); /* handle each oob command */ - for(i = 0; i < urb->actual_length - 3;) { + for (i = 0; i < urb->actual_length - 3;) { opcode = ((unsigned char *)urb->transfer_buffer)[i++]; line = ((unsigned char *)urb->transfer_buffer)[i++]; status = ((unsigned char *)urb->transfer_buffer)[i++]; @@ -1761,27 +1783,29 @@ static int digi_read_oob_callback(struct urb *urb) port = serial->port[line]; - if ((priv=usb_get_serial_port_data(port)) == NULL) + priv = usb_get_serial_port_data(port); + if (priv == NULL) return -1; + rts = 0; + if (port->port.count) + rts = port->port.tty->termios->c_cflag & CRTSCTS; + if (opcode == DIGI_CMD_READ_INPUT_SIGNALS) { spin_lock(&priv->dp_port_lock); /* convert from digi flags to termiox flags */ if (val & DIGI_READ_INPUT_SIGNALS_CTS) { priv->dp_modem_signals |= TIOCM_CTS; /* port must be open to use tty struct */ - if (port->port.count - && port->port.tty->termios->c_cflag & CRTSCTS) { + if (rts) { port->port.tty->hw_stopped = 0; digi_wakeup_write(port); } } else { priv->dp_modem_signals &= ~TIOCM_CTS; /* port must be open to use tty struct */ - if (port->port.count - && port->port.tty->termios->c_cflag & CRTSCTS) { + if (rts) port->port.tty->hw_stopped = 1; - } } if (val & DIGI_READ_INPUT_SIGNALS_DSR) priv->dp_modem_signals |= TIOCM_DSR; @@ -1818,7 +1842,7 @@ static int __init digi_init(void) if (retval) goto failed_acceleport_2_device; retval = usb_serial_register(&digi_acceleport_4_device); - if (retval) + if (retval) goto failed_acceleport_4_device; retval = usb_register(&digi_driver); if (retval) |