diff options
| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2012-09-29 06:45:54 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2012-09-29 06:45:54 +0000 |
| commit | 2d2d71639bbee64cbc4a5db2cf0299bc0aa2cf61 (patch) | |
| tree | 947d442c3db7bb8086a6796a26575b5c1c4db198 /sys/dev/usb | |
| parent | 67c720e230cdcaa0bf3090e91d60e186b50667e9 (diff) | |
From Gavin Atkinson in FreeBSD SVN rev 238778:
The baud rate on CP1201/2/3 devices can be set in one of two ways:
- The USLCOM_SET_BAUD_DIV command (0x01)
- The USLCOM_SET_BAUD_RATE command (0x13)
Devices based on the CP1204 will only accept the latter command, and ignore
the former. As the latter command works on all chips that this driver
supports, switch to always using it.
A slight confusion here is that the previously used command was incorrectly
named USLCOM_BAUD_RATE - even though we no longer use it, rename it to
USLCOM_SET_BAUD_DIV to closer match the name used in the datasheet.
This change reflects a similar change made in the Linux driver, which was
submitted by preston.fick at silabs.com, and has been tested on all of the
uslcom(4) devices I have to hand.
Diffstat (limited to 'sys/dev/usb')
| -rw-r--r-- | sys/dev/usb/uslcom.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/sys/dev/usb/uslcom.c b/sys/dev/usb/uslcom.c index 1debb39c4da..0b728b550d5 100644 --- a/sys/dev/usb/uslcom.c +++ b/sys/dev/usb/uslcom.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uslcom.c,v 1.24 2011/09/16 13:36:18 yuo Exp $ */ +/* $OpenBSD: uslcom.c,v 1.25 2012/09/29 06:45:53 jsg Exp $ */ /* * Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org> @@ -49,10 +49,11 @@ int uslcomdebug = 0; #define USLCOM_READ 0xc1 #define USLCOM_UART 0x00 -#define USLCOM_BAUD_RATE 0x01 +#define USLCOM_SET_BAUD_DIV 0x01 #define USLCOM_DATA 0x03 #define USLCOM_BREAK 0x05 #define USLCOM_CTRL 0x07 +#define USLCOM_SET_BAUD_RATE 0x1e #define USLCOM_UART_DISABLE 0x00 #define USLCOM_UART_ENABLE 0x01 @@ -65,8 +66,7 @@ int uslcomdebug = 0; #define USLCOM_CTRL_DSR 0x0020 #define USLCOM_CTRL_DCD 0x0080 - -#define USLCOM_BAUD_REF 0x384000 +#define USLCOM_BAUD_REF 3686400 /* 3.6864 MHz */ #define USLCOM_STOP_BITS_1 0x00 #define USLCOM_STOP_BITS_2 0x02 @@ -350,17 +350,19 @@ uslcom_param(void *vsc, int portno, struct termios *t) struct uslcom_softc *sc = (struct uslcom_softc *)vsc; usbd_status err; usb_device_request_t req; + uint32_t baudrate; int data; if (t->c_ospeed <= 0 || t->c_ospeed > 921600) return (EINVAL); + baudrate = t->c_ospeed; req.bmRequestType = USLCOM_WRITE; - req.bRequest = USLCOM_BAUD_RATE; - USETW(req.wValue, USLCOM_BAUD_REF / t->c_ospeed); + req.bRequest = USLCOM_SET_BAUD_RATE; + USETW(req.wValue, 0); USETW(req.wIndex, portno); - USETW(req.wLength, 0); - err = usbd_do_request(sc->sc_udev, &req, NULL); + USETW(req.wLength, sizeof(baudrate)); + err = usbd_do_request(sc->sc_udev, &req, &baudrate); if (err) return (EIO); |