NetBSD-5.0.2/sys/dev/usb/uchcom.c
/* $NetBSD: uchcom.c,v 1.7 2008/10/22 10:35:50 haad Exp $ */
/*
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Takuya SHIOZAKI (tshiozak@netbsd.org).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uchcom.c,v 1.7 2008/10/22 10:35:50 haad Exp $");
/*
* driver for WinChipHead CH341/340, the worst USB-serial chip in the world.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/poll.h>
#include <sys/workqueue.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbcdc.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/usb_quirks.h>
#include <dev/usb/ucomvar.h>
#ifdef UCHCOM_DEBUG
#define DPRINTFN(n, x) if (uchcomdebug > (n)) logprintf x
int uchcomdebug = 0;
#else
#define DPRINTFN(n, x)
#endif
#define DPRINTF(x) DPRINTFN(0, x)
#define UCHCOM_IFACE_INDEX 0
#define UCHCOM_CONFIG_INDEX 0
#define UCHCOM_REV_CH340 0x0250
#define UCHCOM_INPUT_BUF_SIZE 8
#define UCHCOM_REQ_GET_VERSION 0x5F
#define UCHCOM_REQ_READ_REG 0x95
#define UCHCOM_REQ_WRITE_REG 0x9A
#define UCHCOM_REQ_RESET 0xA1
#define UCHCOM_REQ_SET_DTRRTS 0xA4
#define UCHCOM_REG_STAT1 0x06
#define UCHCOM_REG_STAT2 0x07
#define UCHCOM_REG_BPS_PRE 0x12
#define UCHCOM_REG_BPS_DIV 0x13
#define UCHCOM_REG_BPS_MOD 0x14
#define UCHCOM_REG_BPS_PAD 0x0F
#define UCHCOM_REG_BREAK1 0x05
#define UCHCOM_REG_BREAK2 0x18
#define UCHCOM_REG_LCR1 0x18
#define UCHCOM_REG_LCR2 0x25
#define UCHCOM_VER_20 0x20
#define UCHCOM_BASE_UNKNOWN 0
#define UCHCOM_BPS_MOD_BASE 20000000
#define UCHCOM_BPS_MOD_BASE_OFS 1100
#define UCHCOM_DTR_MASK 0x20
#define UCHCOM_RTS_MASK 0x40
#define UCHCOM_BRK1_MASK 0x01
#define UCHCOM_BRK2_MASK 0x40
#define UCHCOM_LCR1_MASK 0xAF
#define UCHCOM_LCR2_MASK 0x07
#define UCHCOM_LCR1_PARENB 0x80
#define UCHCOM_LCR2_PAREVEN 0x07
#define UCHCOM_LCR2_PARODD 0x06
#define UCHCOM_LCR2_PARMARK 0x05
#define UCHCOM_LCR2_PARSPACE 0x04
#define UCHCOM_INTR_STAT1 0x02
#define UCHCOM_INTR_STAT2 0x03
#define UCHCOM_INTR_LEAST 4
#define UCHCOMIBUFSIZE 256
#define UCHCOMOBUFSIZE 256
struct uchcom_softc
{
USBBASEDEVICE sc_dev;
usbd_device_handle sc_udev;
device_ptr_t sc_subdev;
usbd_interface_handle sc_iface;
int sc_dying;
/* */
int sc_intr_endpoint;
int sc_intr_size;
usbd_pipe_handle sc_intr_pipe;
u_char *sc_intr_buf;
/* */
uint8_t sc_version;
int sc_dtr;
int sc_rts;
u_char sc_lsr;
u_char sc_msr;
int sc_lcr1;
int sc_lcr2;
};
struct uchcom_endpoints
{
int ep_bulkin;
int ep_bulkout;
int ep_intr;
int ep_intr_size;
};
struct uchcom_divider
{
uint8_t dv_prescaler;
uint8_t dv_div;
uint8_t dv_mod;
};
struct uchcom_divider_record
{
uint32_t dvr_high;
uint32_t dvr_low;
uint32_t dvr_base_clock;
struct uchcom_divider dvr_divider;
};
static const struct uchcom_divider_record dividers[] =
{
{ 307200, 307200, UCHCOM_BASE_UNKNOWN, { 7, 0xD9, 0 } },
{ 921600, 921600, UCHCOM_BASE_UNKNOWN, { 7, 0xF3, 0 } },
{ 2999999, 23530, 6000000, { 3, 0, 0 } },
{ 23529, 2942, 750000, { 2, 0, 0 } },
{ 2941, 368, 93750, { 1, 0, 0 } },
{ 367, 1, 11719, { 0, 0, 0 } },
};
#define NUM_DIVIDERS (sizeof (dividers) / sizeof (dividers[0]))
static const struct usb_devno uchcom_devs[] = {
{ USB_VENDOR_WINCHIPHEAD, USB_PRODUCT_WINCHIPHEAD_CH341SER },
{ USB_VENDOR_WINCHIPHEAD2, USB_PRODUCT_WINCHIPHEAD2_CH341 },
};
#define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p)
Static void uchcom_get_status(void *, int, u_char *, u_char *);
Static void uchcom_set(void *, int, int, int);
Static int uchcom_param(void *, int, struct termios *);
Static int uchcom_open(void *, int);
Static void uchcom_close(void *, int);
Static void uchcom_intr(usbd_xfer_handle, usbd_private_handle,
usbd_status);
static int set_config(struct uchcom_softc *);
static int find_ifaces(struct uchcom_softc *, usbd_interface_handle *);
static int find_endpoints(struct uchcom_softc *,
struct uchcom_endpoints *);
static void close_intr_pipe(struct uchcom_softc *);
struct ucom_methods uchcom_methods = {
.ucom_get_status = uchcom_get_status,
.ucom_set = uchcom_set,
.ucom_param = uchcom_param,
.ucom_ioctl = NULL,
.ucom_open = uchcom_open,
.ucom_close = uchcom_close,
.ucom_read = NULL,
.ucom_write = NULL,
};
int uchcom_match(device_t, cfdata_t, void *);
void uchcom_attach(device_t, device_t, void *);
void uchcom_childdet(device_t, device_t);
int uchcom_detach(device_t, int);
int uchcom_activate(device_t, enum devact);
extern struct cfdriver uchcom_cd;
CFATTACH_DECL2_NEW(uchcom,
sizeof(struct uchcom_softc),
uchcom_match,
uchcom_attach,
uchcom_detach,
uchcom_activate,
NULL,
uchcom_childdet);
/* ----------------------------------------------------------------------
* driver entry points
*/
USB_MATCH(uchcom)
{
USB_MATCH_START(uchcom, uaa);
return (uchcom_lookup(uaa->vendor, uaa->product) != NULL ?
UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
}
USB_ATTACH(uchcom)
{
USB_ATTACH_START(uchcom, sc, uaa);
usbd_device_handle dev = uaa->device;
char *devinfop;
struct uchcom_endpoints endpoints;
struct ucom_attach_args uca;
devinfop = usbd_devinfo_alloc(dev, 0);
USB_ATTACH_SETUP;
aprint_normal_dev(self, "%s\n", devinfop);
usbd_devinfo_free(devinfop);
sc->sc_dev = self;
sc->sc_udev = dev;
sc->sc_dying = 0;
sc->sc_dtr = sc->sc_rts = -1;
sc->sc_lsr = sc->sc_msr = 0;
DPRINTF(("\n\nuchcom attach: sc=%p\n", sc));
if (set_config(sc))
goto failed;
switch (uaa->release) {
case UCHCOM_REV_CH340:
aprint_normal_dev(self, "CH340 detected\n");
break;
default:
aprint_normal_dev(self, "CH341 detected\n");
break;
}
if (find_ifaces(sc, &sc->sc_iface))
goto failed;
if (find_endpoints(sc, &endpoints))
goto failed;
sc->sc_intr_endpoint = endpoints.ep_intr;
sc->sc_intr_size = endpoints.ep_intr_size;
/* setup ucom layer */
uca.portno = UCOM_UNK_PORTNO;
uca.bulkin = endpoints.ep_bulkin;
uca.bulkout = endpoints.ep_bulkout;
uca.ibufsize = UCHCOMIBUFSIZE;
uca.obufsize = UCHCOMOBUFSIZE;
uca.ibufsizepad = UCHCOMIBUFSIZE;
uca.opkthdrlen = 0;
uca.device = dev;
uca.iface = sc->sc_iface;
uca.methods = &uchcom_methods;
uca.arg = sc;
uca.info = NULL;
usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
USBDEV(sc->sc_dev));
sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &uca,
ucomprint, ucomsubmatch);
USB_ATTACH_SUCCESS_RETURN;
failed:
sc->sc_dying = 1;
USB_ATTACH_ERROR_RETURN;
}
void
uchcom_childdet(device_t self, device_t child)
{
struct uchcom_softc *sc = device_private(self);
KASSERT(sc->sc_subdev == child);
sc->sc_subdev = NULL;
}
USB_DETACH(uchcom)
{
USB_DETACH_START(uchcom, sc);
int rv = 0;
DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags));
close_intr_pipe(sc);
sc->sc_dying = 1;
if (sc->sc_subdev != NULL)
rv = config_detach(sc->sc_subdev, flags);
usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
USBDEV(sc->sc_dev));
return rv;
}
int
uchcom_activate(device_t self, enum devact act)
{
struct uchcom_softc *sc = device_private(self);
int rv = 0;
switch (act) {
case DVACT_ACTIVATE:
rv = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
close_intr_pipe(sc);
sc->sc_dying = 1;
if (sc->sc_subdev != NULL)
rv = config_deactivate(sc->sc_subdev);
break;
}
return rv;
}
static int
set_config(struct uchcom_softc *sc)
{
usbd_status err;
err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1);
if (err) {
aprint_error_dev(sc->sc_dev,
"failed to set configuration: %s\n", usbd_errstr(err));
return -1;
}
return 0;
}
static int
find_ifaces(struct uchcom_softc *sc, usbd_interface_handle *riface)
{
usbd_status err;
err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX,
riface);
if (err) {
aprint_error("\n%s: failed to get interface: %s\n",
USBDEVNAME(sc->sc_dev), usbd_errstr(err));
return -1;
}
return 0;
}
static int
find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints)
{
int i, bin=-1, bout=-1, intr=-1, isize=0;
usb_interface_descriptor_t *id;
usb_endpoint_descriptor_t *ed;
id = usbd_get_interface_descriptor(sc->sc_iface);
for (i = 0; i < id->bNumEndpoints; i++) {
ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
if (ed == NULL) {
aprint_error_dev(sc->sc_dev,
"no endpoint descriptor for %d\n", i);
return -1;
}
if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
intr = ed->bEndpointAddress;
isize = UGETW(ed->wMaxPacketSize);
} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
bin = ed->bEndpointAddress;
} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
bout = ed->bEndpointAddress;
}
}
if (intr == -1 || bin == -1 || bout == -1) {
if (intr == -1) {
aprint_error_dev(sc->sc_dev,
"no interrupt end point\n");
}
if (bin == -1) {
aprint_error_dev(sc->sc_dev,
"no data bulk in end point\n");
}
if (bout == -1) {
aprint_error_dev(sc->sc_dev,
"no data bulk out end point\n");
}
return -1;
}
if (isize < UCHCOM_INTR_LEAST) {
aprint_error_dev(sc->sc_dev, "intr pipe is too short\n");
return -1;
}
DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n",
USBDEVNAME(sc->sc_dev), bin, bout, intr, isize));
endpoints->ep_intr = intr;
endpoints->ep_intr_size = isize;
endpoints->ep_bulkin = bin;
endpoints->ep_bulkout = bout;
return 0;
}
/* ----------------------------------------------------------------------
* low level i/o
*/
static __inline usbd_status
generic_control_out(struct uchcom_softc *sc, uint8_t reqno,
uint16_t value, uint16_t index)
{
usb_device_request_t req;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = reqno;
USETW(req.wValue, value);
USETW(req.wIndex, index);
USETW(req.wLength, 0);
return usbd_do_request(sc->sc_udev, &req, 0);
}
static __inline usbd_status
generic_control_in(struct uchcom_softc *sc, uint8_t reqno,
uint16_t value, uint16_t index, void *buf, int buflen,
int *actlen)
{
usb_device_request_t req;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = reqno;
USETW(req.wValue, value);
USETW(req.wIndex, index);
USETW(req.wLength, (uint16_t)buflen);
return usbd_do_request_flags(sc->sc_udev, &req, buf,
USBD_SHORT_XFER_OK, actlen,
USBD_DEFAULT_TIMEOUT);
}
static __inline usbd_status
write_reg(struct uchcom_softc *sc,
uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2)
{
DPRINTF(("uchcom: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n",
(unsigned)reg1, (unsigned)val1,
(unsigned)reg2, (unsigned)val2));
return generic_control_out(
sc, UCHCOM_REQ_WRITE_REG,
reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8));
}
static __inline usbd_status
read_reg(struct uchcom_softc *sc,
uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2)
{
uint8_t buf[UCHCOM_INPUT_BUF_SIZE];
usbd_status err;
int actin;
err = generic_control_in(
sc, UCHCOM_REQ_READ_REG,
reg1|((uint16_t)reg2<<8), 0, buf, sizeof buf, &actin);
if (err)
return err;
DPRINTF(("uchcom: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n",
(unsigned)reg1, (unsigned)buf[0],
(unsigned)reg2, (unsigned)buf[1]));
if (rval1) *rval1 = buf[0];
if (rval2) *rval2 = buf[1];
return USBD_NORMAL_COMPLETION;
}
static __inline usbd_status
get_version(struct uchcom_softc *sc, uint8_t *rver)
{
uint8_t buf[UCHCOM_INPUT_BUF_SIZE];
usbd_status err;
int actin;
err = generic_control_in(
sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof buf, &actin);
if (err)
return err;
if (rver) *rver = buf[0];
return USBD_NORMAL_COMPLETION;
}
static __inline usbd_status
get_status(struct uchcom_softc *sc, uint8_t *rval)
{
return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL);
}
static __inline usbd_status
set_dtrrts_10(struct uchcom_softc *sc, uint8_t val)
{
return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val);
}
static __inline usbd_status
set_dtrrts_20(struct uchcom_softc *sc, uint8_t val)
{
return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0);
}
/* ----------------------------------------------------------------------
* middle layer
*/
static int
update_version(struct uchcom_softc *sc)
{
usbd_status err;
err = get_version(sc, &sc->sc_version);
if (err) {
aprint_error_dev(sc->sc_dev, "cannot get version: %s\n",
usbd_errstr(err));
return EIO;
}
return 0;
}
static void
convert_status(struct uchcom_softc *sc, uint8_t cur)
{
sc->sc_dtr = !(cur & UCHCOM_DTR_MASK);
sc->sc_rts = !(cur & UCHCOM_RTS_MASK);
cur = ~cur & 0x0F;
sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur);
}
static int
update_status(struct uchcom_softc *sc)
{
usbd_status err;
uint8_t cur;
err = get_status(sc, &cur);
if (err) {
aprint_error_dev(sc->sc_dev,
"cannot update status: %s\n", usbd_errstr(err));
return EIO;
}
convert_status(sc, cur);
return 0;
}
static int
set_dtrrts(struct uchcom_softc *sc, int dtr, int rts)
{
usbd_status err;
uint8_t val = 0;
if (dtr) val |= UCHCOM_DTR_MASK;
if (rts) val |= UCHCOM_RTS_MASK;
if (sc->sc_version < UCHCOM_VER_20)
err = set_dtrrts_10(sc, ~val);
else
err = set_dtrrts_20(sc, ~val);
if (err) {
aprint_error_dev(sc->sc_dev, "cannot set DTR/RTS: %s\n",
usbd_errstr(err));
return EIO;
}
return 0;
}
static int
set_break(struct uchcom_softc *sc, int onoff)
{
usbd_status err;
uint8_t brk1, brk2;
err = read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2);
if (err)
return EIO;
if (onoff) {
/* on - clear bits */
brk1 &= ~UCHCOM_BRK1_MASK;
brk2 &= ~UCHCOM_BRK2_MASK;
} else {
/* off - set bits */
brk1 |= UCHCOM_BRK1_MASK;
brk2 |= UCHCOM_BRK2_MASK;
}
err = write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2);
if (err)
return EIO;
return 0;
}
static int
calc_divider_settings(struct uchcom_divider *dp, uint32_t rate)
{
int i;
const struct uchcom_divider_record *rp;
uint32_t div, rem, mod;
/* find record */
for (i=0; i<NUM_DIVIDERS; i++) {
if (dividers[i].dvr_high >= rate &&
dividers[i].dvr_low <= rate) {
rp = ÷rs[i];
goto found;
}
}
return -1;
found:
dp->dv_prescaler = rp->dvr_divider.dv_prescaler;
if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN)
dp->dv_div = rp->dvr_divider.dv_div;
else {
div = rp->dvr_base_clock / rate;
rem = rp->dvr_base_clock % rate;
if (div==0 || div>=0xFF)
return -1;
if ((rem<<1) >= rate)
div += 1;
dp->dv_div = (uint8_t)-div;
}
mod = UCHCOM_BPS_MOD_BASE/rate + UCHCOM_BPS_MOD_BASE_OFS;
mod = mod + mod/2;
dp->dv_mod = mod / 0x100;
return 0;
}
static int
set_dte_rate(struct uchcom_softc *sc, uint32_t rate)
{
usbd_status err;
struct uchcom_divider dv;
if (calc_divider_settings(&dv, rate))
return EINVAL;
if ((err = write_reg(sc,
UCHCOM_REG_BPS_PRE, dv.dv_prescaler,
UCHCOM_REG_BPS_DIV, dv.dv_div)) ||
(err = write_reg(sc,
UCHCOM_REG_BPS_MOD, dv.dv_mod,
UCHCOM_REG_BPS_PAD, 0))) {
aprint_error_dev(sc->sc_dev, "cannot set DTE rate: %s\n",
usbd_errstr(err));
return EIO;
}
return 0;
}
static int
set_line_control(struct uchcom_softc *sc, tcflag_t cflag)
{
usbd_status err;
uint8_t lcr1val = 0, lcr2val = 0;
err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val);
if (err) {
aprint_error_dev(sc->sc_dev, "cannot get LCR: %s\n",
usbd_errstr(err));
return EIO;
}
lcr1val &= ~UCHCOM_LCR1_MASK;
lcr2val &= ~UCHCOM_LCR2_MASK;
/*
* XXX: it is difficult to handle the line control appropriately:
* - CS8, !CSTOPB and any parity mode seems ok, but
* - the chip doesn't have the function to calculate parity
* in !CS8 mode.
* - it is unclear that the chip supports CS5,6 mode.
* - it is unclear how to handle stop bits.
*/
switch (ISSET(cflag, CSIZE)) {
case CS5:
case CS6:
case CS7:
return EINVAL;
case CS8:
break;
}
if (ISSET(cflag, PARENB)) {
lcr1val |= UCHCOM_LCR1_PARENB;
if (ISSET(cflag, PARODD))
lcr2val |= UCHCOM_LCR2_PARODD;
else
lcr2val |= UCHCOM_LCR2_PAREVEN;
}
err = write_reg(sc, UCHCOM_REG_LCR1, lcr1val, UCHCOM_REG_LCR2, lcr2val);
if (err) {
aprint_error_dev(sc->sc_dev, "cannot set LCR: %s\n",
usbd_errstr(err));
return EIO;
}
return 0;
}
static int
clear_chip(struct uchcom_softc *sc)
{
usbd_status err;
DPRINTF(("%s: clear\n", USBDEVNAME(sc->sc_dev)));
err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0);
if (err) {
aprint_error_dev(sc->sc_dev, "cannot clear: %s\n",
usbd_errstr(err));
return EIO;
}
return 0;
}
static int
reset_chip(struct uchcom_softc *sc)
{
usbd_status err;
uint8_t lcr1val, lcr2val, pre, div, mod;
uint16_t val=0, idx=0;
err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val);
if (err)
goto failed;
err = read_reg(sc, UCHCOM_REG_BPS_PRE, &pre, UCHCOM_REG_BPS_DIV, &div);
if (err)
goto failed;
err = read_reg(sc, UCHCOM_REG_BPS_MOD, &mod, UCHCOM_REG_BPS_PAD, NULL);
if (err)
goto failed;
val |= (uint16_t)(lcr1val&0xF0) << 8;
val |= 0x01;
val |= (uint16_t)(lcr2val&0x0F) << 8;
val |= 0x02;
idx |= pre & 0x07;
val |= 0x04;
idx |= (uint16_t)div << 8;
val |= 0x08;
idx |= mod & 0xF8;
val |= 0x10;
DPRINTF(("%s: reset v=0x%04X, i=0x%04X\n",
USBDEVNAME(sc->sc_dev), val, idx));
err = generic_control_out(sc, UCHCOM_REQ_RESET, val, idx);
if (err)
goto failed;
return 0;
failed:
printf("%s: cannot reset: %s\n",
USBDEVNAME(sc->sc_dev), usbd_errstr(err));
return EIO;
}
static int
setup_comm(struct uchcom_softc *sc)
{
int ret;
ret = update_version(sc);
if (ret)
return ret;
ret = clear_chip(sc);
if (ret)
return ret;
ret = set_dte_rate(sc, TTYDEF_SPEED);
if (ret)
return ret;
ret = set_line_control(sc, CS8);
if (ret)
return ret;
ret = update_status(sc);
if (ret)
return ret;
ret = reset_chip(sc);
if (ret)
return ret;
ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */
if (ret)
return ret;
sc->sc_dtr = sc->sc_rts = 1;
ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts);
if (ret)
return ret;
return 0;
}
static int
setup_intr_pipe(struct uchcom_softc *sc)
{
usbd_status err;
if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) {
sc->sc_intr_buf = malloc(sc->sc_intr_size, M_USBDEV, M_WAITOK);
err = usbd_open_pipe_intr(sc->sc_iface,
sc->sc_intr_endpoint,
USBD_SHORT_XFER_OK,
&sc->sc_intr_pipe, sc,
sc->sc_intr_buf,
sc->sc_intr_size,
uchcom_intr, USBD_DEFAULT_INTERVAL);
if (err) {
aprint_error_dev(sc->sc_dev,
"cannot open interrupt pipe: %s\n",
usbd_errstr(err));
return EIO;
}
}
return 0;
}
static void
close_intr_pipe(struct uchcom_softc *sc)
{
usbd_status err;
if (sc->sc_dying)
return;
if (sc->sc_intr_pipe != NULL) {
err = usbd_abort_pipe(sc->sc_intr_pipe);
if (err)
aprint_error_dev(sc->sc_dev,
"abort interrupt pipe failed: %s\n",
usbd_errstr(err));
err = usbd_close_pipe(sc->sc_intr_pipe);
if (err)
aprint_error_dev(sc->sc_dev,
"close interrupt pipe failed: %s\n",
usbd_errstr(err));
free(sc->sc_intr_buf, M_USBDEV);
sc->sc_intr_pipe = NULL;
}
}
/* ----------------------------------------------------------------------
* methods for ucom
*/
void
uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr)
{
struct uchcom_softc *sc = arg;
if (sc->sc_dying)
return;
*rlsr = sc->sc_lsr;
*rmsr = sc->sc_msr;
}
void
uchcom_set(void *arg, int portno, int reg, int onoff)
{
struct uchcom_softc *sc = arg;
if (sc->sc_dying)
return;
switch (reg) {
case UCOM_SET_DTR:
sc->sc_dtr = !!onoff;
set_dtrrts(sc, sc->sc_dtr, sc->sc_rts);
break;
case UCOM_SET_RTS:
sc->sc_rts = !!onoff;
set_dtrrts(sc, sc->sc_dtr, sc->sc_rts);
break;
case UCOM_SET_BREAK:
set_break(sc, onoff);
break;
}
}
int
uchcom_param(void *arg, int portno, struct termios *t)
{
struct uchcom_softc *sc = arg;
int ret;
if (sc->sc_dying)
return 0;
ret = set_line_control(sc, t->c_cflag);
if (ret)
return ret;
ret = set_dte_rate(sc, t->c_ospeed);
if (ret)
return ret;
return 0;
}
int
uchcom_open(void *arg, int portno)
{
int ret;
struct uchcom_softc *sc = arg;
if (sc->sc_dying)
return EIO;
ret = setup_intr_pipe(sc);
if (ret)
return ret;
ret = setup_comm(sc);
if (ret)
return ret;
return 0;
}
void
uchcom_close(void *arg, int portno)
{
struct uchcom_softc *sc = arg;
if (sc->sc_dying)
return;
close_intr_pipe(sc);
}
/* ----------------------------------------------------------------------
* callback when the modem status is changed.
*/
void
uchcom_intr(usbd_xfer_handle xfer, usbd_private_handle priv,
usbd_status status)
{
struct uchcom_softc *sc = priv;
u_char *buf = sc->sc_intr_buf;
if (sc->sc_dying)
return;
if (status != USBD_NORMAL_COMPLETION) {
if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
return;
DPRINTF(("%s: abnormal status: %s\n",
USBDEVNAME(sc->sc_dev), usbd_errstr(status)));
usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
return;
}
DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X "
"0x%02X 0x%02X 0x%02X 0x%02X\n",
USBDEVNAME(sc->sc_dev),
(unsigned)buf[0], (unsigned)buf[1],
(unsigned)buf[2], (unsigned)buf[3],
(unsigned)buf[4], (unsigned)buf[5],
(unsigned)buf[6], (unsigned)buf[7]));
convert_status(sc, buf[UCHCOM_INTR_STAT1]);
ucom_status_change(device_private(sc->sc_subdev));
}