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USB: pl2303: clean up type handling 

Merge types 0 and 1, whose differences are unknown and have always been
treated the same.
Add TYPE_-prefix to both types.
Test for TYPE_01 (rather than !TYPE_HX) for legacy device quirks.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-12-29 19:23:07 +01:00 committed by Greg Kroah-Hartman
parent f84ee3b2f5
commit 7f966ac7a9
1 changed files with 15 additions and 16 deletions
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31
drivers/usb/serial/pl2303.c
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@ -129,9 +129,8 @@ 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 */
};
struct pl2303_serial_private {
@ -200,7 +199,7 @@ static int pl2303_probe(struct usb_serial *serial,
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);
@ -214,13 +213,13 @@ static int pl2303_startup(struct usb_serial *serial)
}
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;
@ -238,10 +237,10 @@ static int pl2303_startup(struct usb_serial *serial)
pl2303_vendor_read(serial, 0x8383, buf);
pl2303_vendor_write(serial, 0, 1);
pl2303_vendor_write(serial, 1, 0);
if (type == HX)
pl2303_vendor_write(serial, 2, 0x44);
else
if (type == TYPE_01)
pl2303_vendor_write(serial, 2, 0x24);
else
pl2303_vendor_write(serial, 2, 0x44);
kfree(buf);
@ -335,7 +334,7 @@ static void pl2303_encode_baudrate(struct tty_struct *tty,
baud = baud_sup[i];
/* type_0, type_1 only support up to 1228800 baud */
if (spriv->type != HX)
if (spriv->type == TYPE_01)
baud = min_t(speed_t, baud, 1228800);
if (baud <= 115200) {
@ -532,10 +531,10 @@ static void pl2303_set_termios(struct tty_struct *tty,
}
if (C_CRTSCTS(tty)) {
if (spriv->type == HX)
pl2303_vendor_write(serial, 0x0, 0x61);
else
if (spriv->type == TYPE_01)
pl2303_vendor_write(serial, 0x0, 0x41);
else
pl2303_vendor_write(serial, 0x0, 0x61);
} else {
pl2303_vendor_write(serial, 0x0, 0x0);
}
@ -572,7 +571,7 @@ 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->type == TYPE_01) {
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
} else {