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path: root/drivers/usb/serial/pl2303.c
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Diffstat (limited to 'drivers/usb/serial/pl2303.c')
-rw-r--r--drivers/usb/serial/pl2303.c96
1 files changed, 75 insertions, 21 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index a70fd86f735c..22579d0d8ab8 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -24,13 +24,14 @@
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include "pl2303.h"
#define PL2303_QUIRK_UART_STATE_IDX0 BIT(0)
#define PL2303_QUIRK_LEGACY BIT(1)
#define PL2303_QUIRK_ENDPOINT_HACK BIT(2)
+#define PL2303_QUIRK_NO_BREAK_GETLINE BIT(3)
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID),
@@ -106,6 +107,7 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) },
{ USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) },
{ USB_DEVICE(HP_VENDOR_ID, HP_LM920_PRODUCT_ID) },
+ { USB_DEVICE(HP_VENDOR_ID, HP_LM930_PRODUCT_ID) },
{ USB_DEVICE(HP_VENDOR_ID, HP_LM940_PRODUCT_ID) },
{ USB_DEVICE(HP_VENDOR_ID, HP_TD620_PRODUCT_ID) },
{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
@@ -116,6 +118,8 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530GC_PRODUCT_ID) },
{ USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
{ USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) },
+ { USB_DEVICE(IBM_VENDOR_ID, IBM_PRODUCT_ID) },
+ { USB_DEVICE(MACROSILICON_VENDOR_ID, MACROSILICON_MS3020_PRODUCT_ID) },
{ } /* Terminating entry */
};
@@ -171,7 +175,7 @@ MODULE_DEVICE_TABLE(usb, id_table);
#define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18
#define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c
-static void pl2303_set_break(struct usb_serial_port *port, bool enable);
+static int pl2303_set_break(struct usb_serial_port *port, bool enable);
enum pl2303_type {
TYPE_H,
@@ -419,6 +423,9 @@ static int pl2303_detect_type(struct usb_serial *serial)
bcdUSB = le16_to_cpu(desc->bcdUSB);
switch (bcdUSB) {
+ case 0x101:
+ /* USB 1.0.1? Let's assume they meant 1.1... */
+ fallthrough;
case 0x110:
switch (bcdDevice) {
case 0x300:
@@ -431,21 +438,29 @@ static int pl2303_detect_type(struct usb_serial *serial)
break;
case 0x200:
switch (bcdDevice) {
- case 0x100:
+ case 0x100: /* GC */
case 0x105:
+ return TYPE_HXN;
+ case 0x300: /* GT / TA */
+ if (pl2303_supports_hx_status(serial))
+ return TYPE_TA;
+ fallthrough;
case 0x305:
+ case 0x400: /* GL */
case 0x405:
- /*
- * Assume it's an HXN-type if the device doesn't
- * support the old read request value.
- */
- if (!pl2303_supports_hx_status(serial))
- return TYPE_HXN;
- break;
- case 0x300:
- return TYPE_TA;
- case 0x500:
- return TYPE_TB;
+ return TYPE_HXN;
+ case 0x500: /* GE / TB */
+ if (pl2303_supports_hx_status(serial))
+ return TYPE_TB;
+ fallthrough;
+ case 0x505:
+ case 0x600: /* GS */
+ case 0x605:
+ case 0x700: /* GR */
+ case 0x705:
+ case 0x905: /* GT-2AB */
+ case 0x1005: /* GC-Q20 */
+ return TYPE_HXN;
}
break;
}
@@ -455,6 +470,25 @@ static int pl2303_detect_type(struct usb_serial *serial)
return -ENODEV;
}
+static bool pl2303_is_hxd_clone(struct usb_serial *serial)
+{
+ struct usb_device *udev = serial->dev;
+ unsigned char *buf;
+ int ret;
+
+ buf = kmalloc(7, GFP_KERNEL);
+ if (!buf)
+ return false;
+
+ ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+ GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
+ 0, 0, buf, 7, 100);
+
+ kfree(buf);
+
+ return ret == -EPIPE;
+}
+
static int pl2303_startup(struct usb_serial *serial)
{
struct pl2303_serial_private *spriv;
@@ -477,6 +511,9 @@ static int pl2303_startup(struct usb_serial *serial)
spriv->quirks = (unsigned long)usb_get_serial_data(serial);
spriv->quirks |= spriv->type->quirks;
+ if (type == TYPE_HXD && pl2303_is_hxd_clone(serial))
+ spriv->quirks |= PL2303_QUIRK_NO_BREAK_GETLINE;
+
usb_set_serial_data(serial, spriv);
if (type != TYPE_HXN) {
@@ -713,9 +750,18 @@ static void pl2303_encode_baud_rate(struct tty_struct *tty,
static int pl2303_get_line_request(struct usb_serial_port *port,
unsigned char buf[7])
{
- struct usb_device *udev = port->serial->dev;
+ struct usb_serial *serial = port->serial;
+ struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
+ struct usb_device *udev = serial->dev;
int ret;
+ if (spriv->quirks & PL2303_QUIRK_NO_BREAK_GETLINE) {
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+
+ memcpy(buf, priv->line_settings, 7);
+ return 0;
+ }
+
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
0, 0, buf, 7, 100);
@@ -778,7 +824,8 @@ static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_ty
}
static void pl2303_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
@@ -1048,12 +1095,16 @@ static int pl2303_carrier_raised(struct usb_serial_port *port)
return 0;
}
-static void pl2303_set_break(struct usb_serial_port *port, bool enable)
+static int pl2303_set_break(struct usb_serial_port *port, bool enable)
{
struct usb_serial *serial = port->serial;
+ struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
u16 state;
int result;
+ if (spriv->quirks & PL2303_QUIRK_NO_BREAK_GETLINE)
+ return -ENOTTY;
+
if (enable)
state = BREAK_ON;
else
@@ -1065,15 +1116,19 @@ static void pl2303_set_break(struct usb_serial_port *port, bool enable)
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
0, NULL, 0, 100);
- if (result)
+ if (result) {
dev_err(&port->dev, "error sending break = %d\n", result);
+ return result;
+ }
+
+ return 0;
}
-static void pl2303_break_ctl(struct tty_struct *tty, int state)
+static int pl2303_break_ctl(struct tty_struct *tty, int state)
{
struct usb_serial_port *port = tty->driver_data;
- pl2303_set_break(port, state);
+ return pl2303_set_break(port, state);
}
static void pl2303_update_line_status(struct usb_serial_port *port,
@@ -1218,7 +1273,6 @@ static void pl2303_process_read_urb(struct urb *urb)
static struct usb_serial_driver pl2303_device = {
.driver = {
- .owner = THIS_MODULE,
.name = "pl2303",
},
.id_table = id_table,
generated by cgit (git 2.34.1) at 2025-12-25 19:24:26 +0000