summaryrefslogtreecommitdiff
path: root/drivers/usb/serial/pl2303.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/serial/pl2303.c')
-rw-r--r--drivers/usb/serial/pl2303.c511
1 files changed, 300 insertions, 211 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 1e3318dfa1cb..2e22fc22c382 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -12,12 +12,10 @@
*
* See Documentation/usb/usb-serial.txt for more information on using this
* driver
- *
*/
#include <linux/kernel.h>
#include <linux/errno.h>
-#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
@@ -32,10 +30,9 @@
#include <asm/unaligned.h>
#include "pl2303.h"
-/*
- * Version Information
- */
-#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
+
+#define PL2303_QUIRK_UART_STATE_IDX0 BIT(0)
+#define PL2303_QUIRK_LEGACY BIT(1)
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
@@ -64,9 +61,12 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
- { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
- { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
- { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
+ { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1),
+ .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
+ { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65),
+ .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
+ { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75),
+ .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
@@ -116,7 +116,8 @@ MODULE_DEVICE_TABLE(usb, id_table);
#define VENDOR_READ_REQUEST_TYPE 0xc0
#define VENDOR_READ_REQUEST 0x01
-#define UART_STATE 0x08
+#define UART_STATE_INDEX 8
+#define UART_STATE_MSR_MASK 0x8b
#define UART_STATE_TRANSIENT_MASK 0x74
#define UART_DCD 0x01
#define UART_DSR 0x02
@@ -129,98 +130,142 @@ MODULE_DEVICE_TABLE(usb, id_table);
enum pl2303_type {
- type_0, /* don't know the difference between type 0 and */
- type_1, /* type 1, until someone from prolific tells us... */
- HX, /* HX version of the pl2303 chip */
+ TYPE_01, /* Type 0 and 1 (difference unknown) */
+ TYPE_HX, /* HX version of the pl2303 chip */
+ TYPE_COUNT
+};
+
+struct pl2303_type_data {
+ speed_t max_baud_rate;
+ unsigned long quirks;
};
struct pl2303_serial_private {
- enum pl2303_type type;
+ const struct pl2303_type_data *type;
+ unsigned long quirks;
};
struct pl2303_private {
spinlock_t lock;
u8 line_control;
u8 line_status;
+
+ u8 line_settings[7];
+};
+
+static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
+ [TYPE_01] = {
+ .max_baud_rate = 1228800,
+ .quirks = PL2303_QUIRK_LEGACY,
+ },
};
-static int pl2303_vendor_read(__u16 value, __u16 index,
- struct usb_serial *serial, unsigned char *buf)
+static int pl2303_vendor_read(struct usb_serial *serial, u16 value,
+ unsigned char buf[1])
{
- int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ struct device *dev = &serial->interface->dev;
+ int res;
+
+ res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
- value, index, buf, 1, 100);
- dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n",
- VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
- res, buf[0]);
- return res;
+ value, 0, buf, 1, 100);
+ if (res != 1) {
+ dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__,
+ value, res);
+ if (res >= 0)
+ res = -EIO;
+
+ return res;
+ }
+
+ dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]);
+
+ return 0;
}
-static int pl2303_vendor_write(__u16 value, __u16 index,
- struct usb_serial *serial)
+static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)
{
- int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ struct device *dev = &serial->interface->dev;
+ int res;
+
+ dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index);
+
+ res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
value, index, NULL, 0, 100);
- dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n",
- VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
- res);
- return res;
+ if (res) {
+ dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__,
+ value, res);
+ return res;
+ }
+
+ return 0;
+}
+
+static int pl2303_probe(struct usb_serial *serial,
+ const struct usb_device_id *id)
+{
+ usb_set_serial_data(serial, (void *)id->driver_info);
+
+ return 0;
}
static int pl2303_startup(struct usb_serial *serial)
{
struct pl2303_serial_private *spriv;
- enum pl2303_type type = type_0;
+ enum pl2303_type type = TYPE_01;
unsigned char *buf;
spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
if (!spriv)
return -ENOMEM;
- buf = kmalloc(10, GFP_KERNEL);
+ buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
kfree(spriv);
return -ENOMEM;
}
if (serial->dev->descriptor.bDeviceClass == 0x02)
- type = type_0;
+ type = TYPE_01; /* type 0 */
else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
- type = HX;
+ type = TYPE_HX;
else if (serial->dev->descriptor.bDeviceClass == 0x00)
- type = type_1;
+ type = TYPE_01; /* type 1 */
else if (serial->dev->descriptor.bDeviceClass == 0xFF)
- type = type_1;
+ type = TYPE_01; /* type 1 */
dev_dbg(&serial->interface->dev, "device type: %d\n", type);
- spriv->type = type;
+ spriv->type = &pl2303_type_data[type];
+ spriv->quirks = (unsigned long)usb_get_serial_data(serial);
+ spriv->quirks |= spriv->type->quirks;
+
usb_set_serial_data(serial, spriv);
- pl2303_vendor_read(0x8484, 0, serial, buf);
- pl2303_vendor_write(0x0404, 0, serial);
- pl2303_vendor_read(0x8484, 0, serial, buf);
- pl2303_vendor_read(0x8383, 0, serial, buf);
- pl2303_vendor_read(0x8484, 0, serial, buf);
- pl2303_vendor_write(0x0404, 1, serial);
- pl2303_vendor_read(0x8484, 0, serial, buf);
- pl2303_vendor_read(0x8383, 0, serial, buf);
- pl2303_vendor_write(0, 1, serial);
- pl2303_vendor_write(1, 0, serial);
- if (type == HX)
- pl2303_vendor_write(2, 0x44, serial);
+ pl2303_vendor_read(serial, 0x8484, buf);
+ pl2303_vendor_write(serial, 0x0404, 0);
+ pl2303_vendor_read(serial, 0x8484, buf);
+ pl2303_vendor_read(serial, 0x8383, buf);
+ pl2303_vendor_read(serial, 0x8484, buf);
+ pl2303_vendor_write(serial, 0x0404, 1);
+ pl2303_vendor_read(serial, 0x8484, buf);
+ pl2303_vendor_read(serial, 0x8383, buf);
+ pl2303_vendor_write(serial, 0, 1);
+ pl2303_vendor_write(serial, 1, 0);
+ if (spriv->quirks & PL2303_QUIRK_LEGACY)
+ pl2303_vendor_write(serial, 2, 0x24);
else
- pl2303_vendor_write(2, 0x24, serial);
+ pl2303_vendor_write(serial, 2, 0x44);
kfree(buf);
+
return 0;
}
static void pl2303_release(struct usb_serial *serial)
{
- struct pl2303_serial_private *spriv;
+ struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
- spriv = usb_get_serial_data(serial);
kfree(spriv);
}
@@ -243,9 +288,8 @@ static int pl2303_port_probe(struct usb_serial_port *port)
static int pl2303_port_remove(struct usb_serial_port *port)
{
- struct pl2303_private *priv;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
- priv = usb_get_serial_port_data(port);
kfree(priv);
return 0;
@@ -256,39 +300,31 @@ static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
struct usb_device *dev = port->serial->dev;
int retval;
+ dev_dbg(&port->dev, "%s - %02x\n", __func__, value);
+
retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
value, 0, NULL, 0, 100);
- dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
- value, retval);
+ if (retval)
+ dev_err(&port->dev, "%s - failed: %d\n", __func__, retval);
+
return retval;
}
-static void pl2303_encode_baudrate(struct tty_struct *tty,
- struct usb_serial_port *port,
- u8 buf[4])
+/*
+ * Returns the nearest supported baud rate that can be set directly without
+ * using divisors.
+ */
+static speed_t pl2303_get_supported_baud_rate(speed_t baud)
{
- const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
- 4800, 7200, 9600, 14400, 19200, 28800, 38400,
- 57600, 115200, 230400, 460800, 500000, 614400,
- 921600, 1228800, 2457600, 3000000, 6000000 };
-
- struct usb_serial *serial = port->serial;
- struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
- int baud;
- int i;
+ static const speed_t baud_sup[] = {
+ 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600,
+ 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800,
+ 614400, 921600, 1228800, 2457600, 3000000, 6000000
+ };
- /*
- * NOTE: Only the values defined in baud_sup are supported!
- * => if unsupported values are set, the PL2303 seems to use
- * 9600 baud (at least my PL2303X always does)
- */
- baud = tty_get_baud_rate(tty);
- dev_dbg(&port->dev, "baud requested = %d\n", baud);
- if (!baud)
- return;
+ unsigned i;
- /* Set baudrate to nearest supported value */
for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
if (baud_sup[i] > baud)
break;
@@ -301,31 +337,120 @@ static void pl2303_encode_baudrate(struct tty_struct *tty,
else
baud = baud_sup[i];
- /* type_0, type_1 only support up to 1228800 baud */
- if (spriv->type != HX)
- baud = min_t(int, baud, 1228800);
+ return baud;
+}
- if (baud <= 115200) {
- put_unaligned_le32(baud, buf);
- } else {
- /*
- * Apparently the formula for higher speeds is:
- * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
- */
- unsigned tmp = 12000000 * 32 / baud;
- buf[3] = 0x80;
- buf[2] = 0;
- buf[1] = (tmp >= 256);
- while (tmp >= 256) {
- tmp >>= 2;
- buf[1] <<= 1;
- }
- buf[0] = tmp;
+/*
+ * NOTE: If unsupported baud rates are set directly, the PL2303 seems to
+ * use 9600 baud.
+ */
+static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4],
+ speed_t baud)
+{
+ put_unaligned_le32(baud, buf);
+
+ return baud;
+}
+
+static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4],
+ speed_t baud)
+{
+ unsigned int tmp;
+
+ /*
+ * Apparently the formula is:
+ * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
+ */
+ tmp = 12000000 * 32 / baud;
+ buf[3] = 0x80;
+ buf[2] = 0;
+ buf[1] = (tmp >= 256);
+ while (tmp >= 256) {
+ tmp >>= 2;
+ buf[1] <<= 1;
}
+ buf[0] = tmp;
+
+ return baud;
+}
+
+static void pl2303_encode_baud_rate(struct tty_struct *tty,
+ struct usb_serial_port *port,
+ u8 buf[4])
+{
+ struct usb_serial *serial = port->serial;
+ struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
+ speed_t baud_sup;
+ speed_t baud;
+
+ baud = tty_get_baud_rate(tty);
+ dev_dbg(&port->dev, "baud requested = %u\n", baud);
+ if (!baud)
+ return;
+
+ if (spriv->type->max_baud_rate)
+ baud = min_t(speed_t, baud, spriv->type->max_baud_rate);
+ /*
+ * Set baud rate to nearest supported value.
+ *
+ * NOTE: Baud rate 500k can only be set using divisors.
+ */
+ baud_sup = pl2303_get_supported_baud_rate(baud);
+
+ if (baud == 500000)
+ baud = pl2303_encode_baud_rate_divisor(buf, baud);
+ else
+ baud = pl2303_encode_baud_rate_direct(buf, baud_sup);
/* Save resulting baud rate */
tty_encode_baud_rate(tty, baud, baud);
- dev_dbg(&port->dev, "baud set = %d\n", baud);
+ dev_dbg(&port->dev, "baud set = %u\n", baud);
+}
+
+static int pl2303_get_line_request(struct usb_serial_port *port,
+ unsigned char buf[7])
+{
+ struct usb_device *udev = port->serial->dev;
+ int ret;
+
+ ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+ GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
+ 0, 0, buf, 7, 100);
+ if (ret != 7) {
+ dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
+
+ if (ret > 0)
+ ret = -EIO;
+
+ return ret;
+ }
+
+ dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
+
+ return 0;
+}
+
+static int pl2303_set_line_request(struct usb_serial_port *port,
+ unsigned char buf[7])
+{
+ struct usb_device *udev = port->serial->dev;
+ int ret;
+
+ ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
+ 0, 0, buf, 7, 100);
+ if (ret != 7) {
+ dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
+
+ if (ret > 0)
+ ret = -EIO;
+
+ return ret;
+ }
+
+ dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
+
+ return 0;
}
static void pl2303_set_termios(struct tty_struct *tty,
@@ -336,30 +461,21 @@ static void pl2303_set_termios(struct tty_struct *tty,
struct pl2303_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
unsigned char *buf;
- int i;
+ int ret;
u8 control;
- /*
- * The PL2303 is reported to lose bytes if you change serial settings
- * even to the same values as before. Thus we actually need to filter
- * in this specific case.
- */
if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
return;
buf = kzalloc(7, GFP_KERNEL);
if (!buf) {
- dev_err(&port->dev, "%s - out of memory.\n", __func__);
/* Report back no change occurred */
if (old_termios)
tty->termios = *old_termios;
return;
}
- i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
- GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
- 0, 0, buf, 7, 100);
- dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
+ pl2303_get_line_request(port, buf);
switch (C_CSIZE(tty)) {
case CS5:
@@ -378,7 +494,7 @@ static void pl2303_set_termios(struct tty_struct *tty,
dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
/* For reference buf[0]:buf[3] baud rate value */
- pl2303_encode_baudrate(tty, port, &buf[0]);
+ pl2303_encode_baud_rate(tty, port, &buf[0]);
/* For reference buf[4]=0 is 1 stop bits */
/* For reference buf[4]=1 is 1.5 stop bits */
@@ -407,7 +523,7 @@ static void pl2303_set_termios(struct tty_struct *tty,
/* For reference buf[5]=3 is mark parity */
/* For reference buf[5]=4 is space parity */
if (C_PARODD(tty)) {
- if (tty->termios.c_cflag & CMSPAR) {
+ if (C_CMSPAR(tty)) {
buf[5] = 3;
dev_dbg(&port->dev, "parity = mark\n");
} else {
@@ -415,7 +531,7 @@ static void pl2303_set_termios(struct tty_struct *tty,
dev_dbg(&port->dev, "parity = odd\n");
}
} else {
- if (tty->termios.c_cflag & CMSPAR) {
+ if (C_CMSPAR(tty)) {
buf[5] = 4;
dev_dbg(&port->dev, "parity = space\n");
} else {
@@ -428,10 +544,23 @@ static void pl2303_set_termios(struct tty_struct *tty,
dev_dbg(&port->dev, "parity = none\n");
}
- i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
- 0, 0, buf, 7, 100);
- dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
+ /*
+ * Some PL2303 are known to lose bytes if you change serial settings
+ * even to the same values as before. Thus we actually need to filter
+ * in this specific case.
+ *
+ * Note that the tty_termios_hw_change check above is not sufficient
+ * as a previously requested baud rate may differ from the one
+ * actually used (and stored in old_termios).
+ *
+ * NOTE: No additional locking needed for line_settings as it is
+ * only used in set_termios, which is serialised against itself.
+ */
+ if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
+ ret = pl2303_set_line_request(port, buf);
+ if (!ret)
+ memcpy(priv->line_settings, buf, 7);
+ }
/* change control lines if we are switching to or from B0 */
spin_lock_irqsave(&priv->lock, flags);
@@ -448,19 +577,13 @@ static void pl2303_set_termios(struct tty_struct *tty,
spin_unlock_irqrestore(&priv->lock, flags);
}
- memset(buf, 0, 7);
- i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
- GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
- 0, 0, buf, 7, 100);
- dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
-
if (C_CRTSCTS(tty)) {
- if (spriv->type == HX)
- pl2303_vendor_write(0x0, 0x61, serial);
+ if (spriv->quirks & PL2303_QUIRK_LEGACY)
+ pl2303_vendor_write(serial, 0x0, 0x41);
else
- pl2303_vendor_write(0x0, 0x41, serial);
+ pl2303_vendor_write(serial, 0x0, 0x61);
} else {
- pl2303_vendor_write(0x0, 0x0, serial);
+ pl2303_vendor_write(serial, 0x0, 0x0);
}
kfree(buf);
@@ -473,13 +596,13 @@ static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
u8 control;
spin_lock_irqsave(&priv->lock, flags);
- /* Change DTR and RTS */
if (on)
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
else
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
control = priv->line_control;
spin_unlock_irqrestore(&priv->lock, flags);
+
pl2303_set_control_lines(port, control);
}
@@ -495,13 +618,13 @@ static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
int result;
- if (spriv->type != HX) {
+ if (spriv->quirks & PL2303_QUIRK_LEGACY) {
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
} else {
/* reset upstream data pipes */
- pl2303_vendor_write(8, 0, serial);
- pl2303_vendor_write(9, 0, serial);
+ pl2303_vendor_write(serial, 8, 0);
+ pl2303_vendor_write(serial, 9, 0);
}
/* Setup termios */
@@ -510,8 +633,8 @@ static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result) {
- dev_err(&port->dev, "%s - failed submitting interrupt urb,"
- " error %d\n", __func__, result);
+ dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
+ result);
return result;
}
@@ -581,48 +704,10 @@ static int pl2303_tiocmget(struct tty_struct *tty)
static int pl2303_carrier_raised(struct usb_serial_port *port)
{
struct pl2303_private *priv = usb_get_serial_port_data(port);
+
if (priv->line_status & UART_DCD)
return 1;
- return 0;
-}
-static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct pl2303_private *priv = usb_get_serial_port_data(port);
- unsigned long flags;
- unsigned int prevstatus;
- unsigned int status;
- unsigned int changed;
-
- spin_lock_irqsave(&priv->lock, flags);
- prevstatus = priv->line_status;
- spin_unlock_irqrestore(&priv->lock, flags);
-
- while (1) {
- interruptible_sleep_on(&port->port.delta_msr_wait);
- /* see if a signal did it */
- if (signal_pending(current))
- return -ERESTARTSYS;
-
- if (port->serial->disconnected)
- return -EIO;
-
- spin_lock_irqsave(&priv->lock, flags);
- status = priv->line_status;
- spin_unlock_irqrestore(&priv->lock, flags);
-
- changed = prevstatus ^ status;
-
- if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
- ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
- ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
- ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
- return 0;
- }
- prevstatus = status;
- }
- /* NOTREACHED */
return 0;
}
@@ -632,8 +717,6 @@ static int pl2303_ioctl(struct tty_struct *tty,
struct serial_struct ser;
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
-
switch (cmd) {
case TIOCGSERIAL:
memset(&ser, 0, sizeof ser);
@@ -647,9 +730,9 @@ static int pl2303_ioctl(struct tty_struct *tty,
return 0;
default:
- dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
break;
}
+
return -ENOIOCTLCMD;
}
@@ -664,6 +747,7 @@ static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
state = BREAK_OFF;
else
state = BREAK_ON;
+
dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
state == BREAK_OFF ? "off" : "on");
@@ -678,48 +762,51 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
unsigned char *data,
unsigned int actual_length)
{
-
+ struct usb_serial *serial = port->serial;
+ struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
struct pl2303_private *priv = usb_get_serial_port_data(port);
struct tty_struct *tty;
unsigned long flags;
- u8 status_idx = UART_STATE;
- u8 length = UART_STATE + 1;
- u8 prev_line_status;
- u16 idv, idp;
-
- idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
- idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
-
+ unsigned int status_idx = UART_STATE_INDEX;
+ u8 status;
+ u8 delta;
- if (idv == SIEMENS_VENDOR_ID) {
- if (idp == SIEMENS_PRODUCT_ID_X65 ||
- idp == SIEMENS_PRODUCT_ID_SX1 ||
- idp == SIEMENS_PRODUCT_ID_X75) {
+ if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0)
+ status_idx = 0;
- length = 1;
- status_idx = 0;
- }
- }
-
- if (actual_length < length)
+ if (actual_length < status_idx + 1)
return;
+ status = data[status_idx];
+
/* Save off the uart status for others to look at */
spin_lock_irqsave(&priv->lock, flags);
- prev_line_status = priv->line_status;
- priv->line_status = data[status_idx];
+ delta = priv->line_status ^ status;
+ priv->line_status = status;
spin_unlock_irqrestore(&priv->lock, flags);
- if (priv->line_status & UART_BREAK_ERROR)
+
+ if (status & UART_BREAK_ERROR)
usb_serial_handle_break(port);
- wake_up_interruptible(&port->port.delta_msr_wait);
- tty = tty_port_tty_get(&port->port);
- if (!tty)
- return;
- if ((priv->line_status ^ prev_line_status) & UART_DCD)
- usb_serial_handle_dcd_change(port, tty,
- priv->line_status & UART_DCD);
- tty_kref_put(tty);
+ if (delta & UART_STATE_MSR_MASK) {
+ if (delta & UART_CTS)
+ port->icount.cts++;
+ if (delta & UART_DSR)
+ port->icount.dsr++;
+ if (delta & UART_RING)
+ port->icount.rng++;
+ if (delta & UART_DCD) {
+ port->icount.dcd++;
+ tty = tty_port_tty_get(&port->port);
+ if (tty) {
+ usb_serial_handle_dcd_change(port, tty,
+ status & UART_DCD);
+ tty_kref_put(tty);
+ }
+ }
+
+ wake_up_interruptible(&port->port.delta_msr_wait);
+ }
}
static void pl2303_read_int_callback(struct urb *urb)
@@ -754,10 +841,11 @@ static void pl2303_read_int_callback(struct urb *urb)
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
- if (retval)
+ if (retval) {
dev_err(&port->dev,
"%s - usb_submit_urb failed with result %d\n",
__func__, retval);
+ }
}
static void pl2303_process_read_urb(struct urb *urb)
@@ -775,13 +863,14 @@ static void pl2303_process_read_urb(struct urb *urb)
line_status = priv->line_status;
priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
spin_unlock_irqrestore(&priv->lock, flags);
- wake_up_interruptible(&port->port.delta_msr_wait);
if (!urb->actual_length)
return;
- /* break takes precedence over parity, */
- /* which takes precedence over framing errors */
+ /*
+ * Break takes precedence over parity, which takes precedence over
+ * framing errors.
+ */
if (line_status & UART_BREAK_ERROR)
tty_flag = TTY_BREAK;
else if (line_status & UART_PARITY_ERROR)
@@ -809,7 +898,6 @@ static void pl2303_process_read_urb(struct urb *urb)
tty_flip_buffer_push(&port->port);
}
-/* All of the device info needed for the PL2303 SIO serial converter */
static struct usb_serial_driver pl2303_device = {
.driver = {
.owner = THIS_MODULE,
@@ -821,16 +909,17 @@ static struct usb_serial_driver pl2303_device = {
.bulk_out_size = 256,
.open = pl2303_open,
.close = pl2303_close,
- .dtr_rts = pl2303_dtr_rts,
+ .dtr_rts = pl2303_dtr_rts,
.carrier_raised = pl2303_carrier_raised,
.ioctl = pl2303_ioctl,
.break_ctl = pl2303_break_ctl,
.set_termios = pl2303_set_termios,
.tiocmget = pl2303_tiocmget,
.tiocmset = pl2303_tiocmset,
- .tiocmiwait = pl2303_tiocmiwait,
+ .tiocmiwait = usb_serial_generic_tiocmiwait,
.process_read_urb = pl2303_process_read_urb,
.read_int_callback = pl2303_read_int_callback,
+ .probe = pl2303_probe,
.attach = pl2303_startup,
.release = pl2303_release,
.port_probe = pl2303_port_probe,
@@ -843,5 +932,5 @@ static struct usb_serial_driver * const serial_drivers[] = {
module_usb_serial_driver(serial_drivers, id_table);
-MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
MODULE_LICENSE("GPL");