PL2303HXN (TYPE_HXN) can program form 1 bps to 12000000 bps and
support standard & non-standard baud rates (Note 1) are set directly
It doesn't need complicated baud rate division calculation.
Note 1:
Standard baud rate:
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
Non-standard baud rate (1 ~ 12000000):
1, 2, 5, 22, 55, 60, 75, 80, 123, 130, 150, 180, 187, 200, 300, 340,
400,..... 115200, 230400, 460800, 474747, 515151, 614400, 921600,
.. 1000000,.. 7000000,.. 12000000
Signed-off-by: Charles Yeh <charlesyeh522@xxxxxxxxx>
---
---
drivers/usb/serial/pl2303.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index aab737e1e7b6..63d354a92db9 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -565,17 +565,21 @@ static void pl2303_encode_baud_rate(struct tty_struct *tty,
if (!baud)
return;
- if (spriv->type->max_baud_rate)
- baud = min_t(speed_t, baud, spriv->type->max_baud_rate);
- /*
- * Use direct method for supported baud rates, otherwise use divisors.
- */
- baud_sup = pl2303_get_supported_baud_rate(baud);
-
- if (baud == baud_sup)
+ if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
baud = pl2303_encode_baud_rate_direct(buf, baud);
- else
- baud = pl2303_encode_baud_rate_divisor(buf, baud);
+ } else {
+ if (spriv->type->max_baud_rate)
+ baud = min_t(speed_t, baud, spriv->type->max_baud_rate);
+ /*
+ * Use direct method for supported baud rates, otherwise use divisors.
+ */
+ baud_sup = pl2303_get_supported_baud_rate(baud);
+
+ if (baud == baud_sup)
+ baud = pl2303_encode_baud_rate_direct(buf, baud);
+ else
+ baud = pl2303_encode_baud_rate_divisor(buf, baud);
+ }
/* Save resulting baud rate */
tty_encode_baud_rate(tty, baud, baud);
--
2.20.1
