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path: root/drivers/usb/serial/ssu100.c
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Diffstat (limited to 'drivers/usb/serial/ssu100.c')
-rw-r--r--drivers/usb/serial/ssu100.c155
1 files changed, 27 insertions, 128 deletions
diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 4543ea35022..a7fe664b6b7 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -6,7 +6,6 @@
*/
#include <linux/errno.h>
-#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
@@ -61,8 +60,6 @@ struct ssu100_port_private {
spinlock_t status_lock;
u8 shadowLSR;
u8 shadowMSR;
- wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
- struct async_icount icount;
};
static inline int ssu100_control_msg(struct usb_device *dev,
@@ -316,11 +313,6 @@ static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
return usb_serial_generic_open(tty, port);
}
-static void ssu100_close(struct usb_serial_port *port)
-{
- usb_serial_generic_close(port);
-}
-
static int get_serial_info(struct usb_serial_port *port,
struct serial_struct __user *retinfo)
{
@@ -330,7 +322,7 @@ static int get_serial_info(struct usb_serial_port *port,
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
- tmp.line = port->serial->minor;
+ tmp.line = port->minor;
tmp.port = 0;
tmp.irq = 0;
tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
@@ -344,90 +336,19 @@ static int get_serial_info(struct usb_serial_port *port,
return 0;
}
-static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
-{
- struct ssu100_port_private *priv = usb_get_serial_port_data(port);
- struct async_icount prev, cur;
- unsigned long flags;
-
- spin_lock_irqsave(&priv->status_lock, flags);
- prev = priv->icount;
- spin_unlock_irqrestore(&priv->status_lock, flags);
-
- while (1) {
- wait_event_interruptible(priv->delta_msr_wait,
- ((priv->icount.rng != prev.rng) ||
- (priv->icount.dsr != prev.dsr) ||
- (priv->icount.dcd != prev.dcd) ||
- (priv->icount.cts != prev.cts)));
-
- if (signal_pending(current))
- return -ERESTARTSYS;
-
- spin_lock_irqsave(&priv->status_lock, flags);
- cur = priv->icount;
- spin_unlock_irqrestore(&priv->status_lock, flags);
-
- if ((prev.rng == cur.rng) &&
- (prev.dsr == cur.dsr) &&
- (prev.dcd == cur.dcd) &&
- (prev.cts == cur.cts))
- return -EIO;
-
- if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
- (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
- (arg & TIOCM_CD && (prev.dcd != cur.dcd)) ||
- (arg & TIOCM_CTS && (prev.cts != cur.cts)))
- return 0;
- }
- return 0;
-}
-
-static int ssu100_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct ssu100_port_private *priv = usb_get_serial_port_data(port);
- struct async_icount cnow = priv->icount;
-
- 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 0;
-}
-
-
-
static int ssu100_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);
-
switch (cmd) {
case TIOCGSERIAL:
return get_serial_info(port,
(struct serial_struct __user *) arg);
-
- case TIOCMIWAIT:
- return wait_modem_info(port, arg);
-
default:
break;
}
- dev_dbg(&port->dev, "%s arg not supported\n", __func__);
-
return -ENOIOCTLCMD;
}
@@ -445,7 +366,6 @@ static int ssu100_port_probe(struct usb_serial_port *port)
return -ENOMEM;
spin_lock_init(&priv->status_lock);
- init_waitqueue_head(&priv->delta_msr_wait);
usb_set_serial_port_data(port, priv);
@@ -506,19 +426,16 @@ static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
{
struct usb_device *dev = port->serial->dev;
- mutex_lock(&port->serial->disc_mutex);
- if (!port->serial->disconnected) {
- /* Disable flow control */
- if (!on &&
- ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
+ /* Disable flow control */
+ if (!on) {
+ if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
dev_err(&port->dev, "error from flowcontrol urb\n");
- /* drop RTS and DTR */
- if (on)
- set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
- else
- clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
}
- mutex_unlock(&port->serial->disc_mutex);
+ /* drop RTS and DTR */
+ if (on)
+ set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
+ else
+ clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
}
static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
@@ -533,14 +450,14 @@ static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
if (msr & UART_MSR_ANY_DELTA) {
/* update input line counters */
if (msr & UART_MSR_DCTS)
- priv->icount.cts++;
+ port->icount.cts++;
if (msr & UART_MSR_DDSR)
- priv->icount.dsr++;
+ port->icount.dsr++;
if (msr & UART_MSR_DDCD)
- priv->icount.dcd++;
+ port->icount.dcd++;
if (msr & UART_MSR_TERI)
- priv->icount.rng++;
- wake_up_interruptible(&priv->delta_msr_wait);
+ port->icount.rng++;
+ wake_up_interruptible(&port->port.delta_msr_wait);
}
}
@@ -559,22 +476,22 @@ static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
/* we always want to update icount, but we only want to
* update tty_flag for one case */
if (lsr & UART_LSR_BI) {
- priv->icount.brk++;
+ port->icount.brk++;
*tty_flag = TTY_BREAK;
usb_serial_handle_break(port);
}
if (lsr & UART_LSR_PE) {
- priv->icount.parity++;
+ port->icount.parity++;
if (*tty_flag == TTY_NORMAL)
*tty_flag = TTY_PARITY;
}
if (lsr & UART_LSR_FE) {
- priv->icount.frame++;
+ port->icount.frame++;
if (*tty_flag == TTY_NORMAL)
*tty_flag = TTY_FRAME;
}
if (lsr & UART_LSR_OE){
- priv->icount.overrun++;
+ port->icount.overrun++;
if (*tty_flag == TTY_NORMAL)
*tty_flag = TTY_OVERRUN;
}
@@ -582,8 +499,7 @@ static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
}
-static int ssu100_process_packet(struct urb *urb,
- struct tty_struct *tty)
+static void ssu100_process_read_urb(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
char *packet = (char *)urb->transfer_buffer;
@@ -598,7 +514,8 @@ static int ssu100_process_packet(struct urb *urb,
if (packet[2] == 0x00) {
ssu100_update_lsr(port, packet[3], &flag);
if (flag == TTY_OVERRUN)
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ tty_insert_flip_char(&port->port, 0,
+ TTY_OVERRUN);
}
if (packet[2] == 0x01)
ssu100_update_msr(port, packet[3]);
@@ -609,34 +526,17 @@ static int ssu100_process_packet(struct urb *urb,
ch = packet;
if (!len)
- return 0; /* status only */
+ return; /* status only */
if (port->port.console && port->sysrq) {
for (i = 0; i < len; i++, ch++) {
if (!usb_serial_handle_sysrq_char(port, *ch))
- tty_insert_flip_char(tty, *ch, flag);
+ tty_insert_flip_char(&port->port, *ch, flag);
}
} else
- tty_insert_flip_string_fixed_flag(tty, ch, flag, len);
-
- return len;
-}
-
-static void ssu100_process_read_urb(struct urb *urb)
-{
- struct usb_serial_port *port = urb->context;
- struct tty_struct *tty;
- int count;
-
- tty = tty_port_tty_get(&port->port);
- if (!tty)
- return;
-
- count = ssu100_process_packet(urb, tty);
+ tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);
- if (count)
- tty_flip_buffer_push(tty);
- tty_kref_put(tty);
+ tty_flip_buffer_push(&port->port);
}
static struct usb_serial_driver ssu100_device = {
@@ -648,7 +548,6 @@ static struct usb_serial_driver ssu100_device = {
.id_table = id_table,
.num_ports = 1,
.open = ssu100_open,
- .close = ssu100_close,
.attach = ssu100_attach,
.port_probe = ssu100_port_probe,
.port_remove = ssu100_port_remove,
@@ -656,10 +555,10 @@ static struct usb_serial_driver ssu100_device = {
.process_read_urb = ssu100_process_read_urb,
.tiocmget = ssu100_tiocmget,
.tiocmset = ssu100_tiocmset,
- .get_icount = ssu100_get_icount,
+ .tiocmiwait = usb_serial_generic_tiocmiwait,
+ .get_icount = usb_serial_generic_get_icount,
.ioctl = ssu100_ioctl,
.set_termios = ssu100_set_termios,
- .disconnect = usb_serial_generic_disconnect,
};
static struct usb_serial_driver * const serial_drivers[] = {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 18:16:12 +0000