The Pull-UP mode only support PL2303HXD,it needs to use addition schematic design.
Signed-off-by: Charles Yeh <charlesyeh522@xxxxxxxxx>
---
drivers/usb/serial/pl2303.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 98e7a5df0f6d..72544e5c928d 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -144,6 +144,9 @@ MODULE_DEVICE_TABLE(usb, id_table);
#define UART_OVERRUN_ERROR 0x40
#define UART_CTS 0x80
+#define TYPE_HX_PULLUP_MODE_DATA 0x08
+#define TYPE_HX_PULLUP_MODE_REG 0x09
+
static void pl2303_set_break(struct usb_serial_port *port, bool enable);
enum pl2303_type {
@@ -687,6 +690,15 @@ static void pl2303_set_termios(struct tty_struct *tty,
pl2303_vendor_write(serial, 0x0, 0x0);
}
+ pl2303_vendor_read(serial, 0x8484, buf);
+ pl2303_vendor_write(serial, 0x0404, TYPE_HX_PULLUP_MODE_REG);
+ pl2303_vendor_read(serial, 0x8484, buf);
+ pl2303_vendor_read(serial, 0x8383, buf);
+ if (*buf == TYPE_HX_PULLUP_MODE_DATA) {
+ pl2303_vendor_write(serial, 0x0, 0x31);
+ pl2303_vendor_write(serial, 0x1, 0x01);
+ }
+
kfree(buf);
}
--
2.19.1
