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path: root/drivers/usb/serial/ftdi_sio.c
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Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
-rw-r--r--drivers/usb/serial/ftdi_sio.c91
1 files changed, 64 insertions, 27 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 5fc13e717911..8fe034d2d3e7 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -73,6 +73,7 @@ struct ftdi_private {
*/
int flags; /* some ASYNC_xxxx flags are supported */
unsigned long last_dtr_rts; /* saved modem control outputs */
+ struct async_icount icount;
wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
char prev_status, diff_status; /* Used for TIOCMIWAIT */
char transmit_empty; /* If transmitter is empty or not */
@@ -207,6 +208,8 @@ static struct usb_device_id id_table_combined [] = {
{ USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_URBAN_0_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_URBAN_1_PID) },
{ USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
@@ -745,6 +748,8 @@ static struct usb_device_id id_table_combined [] = {
.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
{ USB_DEVICE(FTDI_VID, LMI_LM3S_EVAL_BOARD_PID),
.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
+ { USB_DEVICE(FTDI_VID, LMI_LM3S_ICDI_BOARD_PID),
+ .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
{ USB_DEVICE(FTDI_VID, FTDI_TURTELIZER_PID),
.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID_USB60F) },
@@ -885,6 +890,8 @@ static void ftdi_set_termios(struct tty_struct *tty,
static int ftdi_tiocmget(struct tty_struct *tty);
static int ftdi_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
+static int ftdi_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount);
static int ftdi_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg);
static void ftdi_break_ctl(struct tty_struct *tty, int break_state);
@@ -919,6 +926,7 @@ static struct usb_serial_driver ftdi_sio_device = {
.prepare_write_buffer = ftdi_prepare_write_buffer,
.tiocmget = ftdi_tiocmget,
.tiocmset = ftdi_tiocmset,
+ .get_icount = ftdi_get_icount,
.ioctl = ftdi_ioctl,
.set_termios = ftdi_set_termios,
.break_ctl = ftdi_break_ctl,
@@ -1486,7 +1494,7 @@ static void ftdi_set_max_packet_size(struct usb_serial_port *port)
}
/* set max packet size based on descriptor */
- priv->max_packet_size = le16_to_cpu(ep_desc->wMaxPacketSize);
+ priv->max_packet_size = usb_endpoint_maxp(ep_desc);
dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
}
@@ -1646,6 +1654,7 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
kref_init(&priv->kref);
mutex_init(&priv->cfg_lock);
+ memset(&priv->icount, 0x00, sizeof(priv->icount));
init_waitqueue_head(&priv->delta_msr_wait);
priv->flags = ASYNC_LOW_LATENCY;
@@ -1909,6 +1918,7 @@ static int ftdi_prepare_write_buffer(struct usb_serial_port *port,
c = kfifo_out(&port->write_fifo, &buffer[i + 1], len);
if (!c)
break;
+ priv->icount.tx += c;
buffer[i] = (c << 2) + 1;
count += c + 1;
}
@@ -1916,6 +1926,7 @@ static int ftdi_prepare_write_buffer(struct usb_serial_port *port,
} else {
count = kfifo_out_locked(&port->write_fifo, dest, size,
&port->lock);
+ priv->icount.tx += count;
}
return count;
@@ -1943,6 +1954,14 @@ static int ftdi_process_packet(struct tty_struct *tty,
N.B. packet may be processed more than once, but differences
are only processed once. */
status = packet[0] & FTDI_STATUS_B0_MASK;
+ if (status & FTDI_RS0_CTS)
+ priv->icount.cts++;
+ if (status & FTDI_RS0_DSR)
+ priv->icount.dsr++;
+ if (status & FTDI_RS0_RI)
+ priv->icount.rng++;
+ if (status & FTDI_RS0_RLSD)
+ priv->icount.dcd++;
if (status != priv->prev_status) {
priv->diff_status |= status ^ priv->prev_status;
wake_up_interruptible(&priv->delta_msr_wait);
@@ -1955,15 +1974,20 @@ static int ftdi_process_packet(struct tty_struct *tty,
* over framing errors */
if (packet[1] & FTDI_RS_BI) {
flag = TTY_BREAK;
+ priv->icount.brk++;
usb_serial_handle_break(port);
} else if (packet[1] & FTDI_RS_PE) {
flag = TTY_PARITY;
+ priv->icount.parity++;
} else if (packet[1] & FTDI_RS_FE) {
flag = TTY_FRAME;
+ priv->icount.frame++;
}
/* Overrun is special, not associated with a char */
- if (packet[1] & FTDI_RS_OE)
+ if (packet[1] & FTDI_RS_OE) {
+ priv->icount.overrun++;
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ }
}
/* save if the transmitter is empty or not */
@@ -1975,6 +1999,7 @@ static int ftdi_process_packet(struct tty_struct *tty,
len -= 2;
if (!len)
return 0; /* status only */
+ priv->icount.rx += len;
ch = packet + 2;
if (port->port.console && port->sysrq) {
@@ -2277,11 +2302,34 @@ static int ftdi_tiocmset(struct tty_struct *tty,
return update_mctrl(port, set, clear);
}
+static int ftdi_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ftdi_private *priv = usb_get_serial_port_data(port);
+ struct async_icount *ic = &priv->icount;
+
+ icount->cts = ic->cts;
+ icount->dsr = ic->dsr;
+ icount->rng = ic->rng;
+ icount->dcd = ic->dcd;
+ icount->tx = ic->tx;
+ icount->rx = ic->rx;
+ icount->frame = ic->frame;
+ icount->parity = ic->parity;
+ icount->overrun = ic->overrun;
+ icount->brk = ic->brk;
+ icount->buf_overrun = ic->buf_overrun;
+ return 0;
+}
+
static int ftdi_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
struct usb_serial_port *port = tty->driver_data;
struct ftdi_private *priv = usb_get_serial_port_data(port);
+ struct async_icount cnow;
+ struct async_icount cprev;
dbg("%s cmd 0x%04x", __func__, cmd);
@@ -2301,41 +2349,30 @@ static int ftdi_ioctl(struct tty_struct *tty,
* - 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.
- * (except that the driver doesn't support it !)
*
* This code is borrowed from linux/drivers/char/serial.c
*/
case TIOCMIWAIT:
- while (priv != NULL) {
+ cprev = priv->icount;
+ while (1) {
interruptible_sleep_on(&priv->delta_msr_wait);
/* see if a signal did it */
if (signal_pending(current))
return -ERESTARTSYS;
- else {
- char diff = priv->diff_status;
-
- if (diff == 0)
- return -EIO; /* no change => error */
-
- /* Consume all events */
- priv->diff_status = 0;
-
- /* Return 0 if caller wanted to know about
- these bits */
- if (((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
- ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
- ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
- ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS))) {
- return 0;
- }
- /*
- * Otherwise caller can't care less about what
- * happened,and so we continue to wait for more
- * events.
- */
+ cnow = priv->icount;
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
+ return -EIO; /* no change => error */
+ if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
+ return 0;
}
+ cprev = cnow;
}
- return 0;
+ /* not reached */
+ break;
case TIOCSERGETLSR:
return get_lsr_info(port, (struct serial_struct __user *)arg);
break;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 13:13:03 +0000