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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/drm/radeon/@/dev/usb/serial/uchcom.c |
/* $NetBSD: uchcom.c,v 1.1 2007/09/03 17:57:37 tshiozak Exp $ */
/*-
* Copyright (c) 2007, Takanori Watanabe
* All rights reserved.
*
* 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 AUTHOR 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 AUTHOR 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.
*/
/*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/usb/serial/uchcom.c 235000 2012-05-04 15:05:30Z hselasky $");
/*
* Driver for WinChipHead CH341/340, the worst USB-serial chip in the
* world.
*/
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include "usbdevs.h"
#define USB_DEBUG_VAR uchcom_debug
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/serial/usb_serial.h>
#ifdef USB_DEBUG
static int uchcom_debug = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, uchcom, CTLFLAG_RW, 0, "USB uchcom");
SYSCTL_INT(_hw_usb_uchcom, OID_AUTO, debug, CTLFLAG_RW,
&uchcom_debug, 0, "uchcom debug level");
#endif
#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 UCHCOM_BULK_BUF_SIZE 1024 /* bytes */
enum {
UCHCOM_BULK_DT_WR,
UCHCOM_BULK_DT_RD,
UCHCOM_INTR_DT_RD,
UCHCOM_N_TRANSFER,
};
struct uchcom_softc {
struct ucom_super_softc sc_super_ucom;
struct ucom_softc sc_ucom;
struct usb_xfer *sc_xfer[UCHCOM_N_TRANSFER];
struct usb_device *sc_udev;
struct mtx sc_mtx;
uint8_t sc_dtr; /* local copy */
uint8_t sc_rts; /* local copy */
uint8_t sc_version;
uint8_t sc_msr;
uint8_t sc_lsr; /* local status register */
};
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_HOST_ID uchcom_devs[] = {
{USB_VPI(USB_VENDOR_WCH, USB_PRODUCT_WCH_CH341SER, 0)},
{USB_VPI(USB_VENDOR_WCH2, USB_PRODUCT_WCH2_CH341SER, 0)},
};
/* protypes */
static int uchcom_pre_param(struct ucom_softc *, struct termios *);
static void uchcom_cfg_get_status(struct ucom_softc *, uint8_t *,
uint8_t *);
static void uchcom_cfg_open(struct ucom_softc *ucom);
static void uchcom_cfg_param(struct ucom_softc *, struct termios *);
static void uchcom_cfg_set_break(struct ucom_softc *, uint8_t);
static void uchcom_cfg_set_dtr(struct ucom_softc *, uint8_t);
static void uchcom_cfg_set_rts(struct ucom_softc *, uint8_t);
static void uchcom_start_read(struct ucom_softc *);
static void uchcom_start_write(struct ucom_softc *);
static void uchcom_stop_read(struct ucom_softc *);
static void uchcom_stop_write(struct ucom_softc *);
static void uchcom_update_version(struct uchcom_softc *);
static void uchcom_convert_status(struct uchcom_softc *, uint8_t);
static void uchcom_update_status(struct uchcom_softc *);
static void uchcom_set_dtr_rts(struct uchcom_softc *);
static int uchcom_calc_divider_settings(struct uchcom_divider *, uint32_t);
static void uchcom_set_baudrate(struct uchcom_softc *, uint32_t);
static void uchcom_poll(struct ucom_softc *ucom);
static device_probe_t uchcom_probe;
static device_attach_t uchcom_attach;
static device_detach_t uchcom_detach;
static usb_callback_t uchcom_intr_callback;
static usb_callback_t uchcom_write_callback;
static usb_callback_t uchcom_read_callback;
static const struct usb_config uchcom_config_data[UCHCOM_N_TRANSFER] = {
[UCHCOM_BULK_DT_WR] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_OUT,
.bufsize = UCHCOM_BULK_BUF_SIZE,
.flags = {.pipe_bof = 1,.force_short_xfer = 1,},
.callback = &uchcom_write_callback,
},
[UCHCOM_BULK_DT_RD] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_IN,
.bufsize = UCHCOM_BULK_BUF_SIZE,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
.callback = &uchcom_read_callback,
},
[UCHCOM_INTR_DT_RD] = {
.type = UE_INTERRUPT,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_IN,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
.bufsize = 0, /* use wMaxPacketSize */
.callback = &uchcom_intr_callback,
},
};
static struct ucom_callback uchcom_callback = {
.ucom_cfg_get_status = &uchcom_cfg_get_status,
.ucom_cfg_set_dtr = &uchcom_cfg_set_dtr,
.ucom_cfg_set_rts = &uchcom_cfg_set_rts,
.ucom_cfg_set_break = &uchcom_cfg_set_break,
.ucom_cfg_open = &uchcom_cfg_open,
.ucom_cfg_param = &uchcom_cfg_param,
.ucom_pre_param = &uchcom_pre_param,
.ucom_start_read = &uchcom_start_read,
.ucom_stop_read = &uchcom_stop_read,
.ucom_start_write = &uchcom_start_write,
.ucom_stop_write = &uchcom_stop_write,
.ucom_poll = &uchcom_poll,
};
/* ----------------------------------------------------------------------
* driver entry points
*/
static int
uchcom_probe(device_t dev)
{
struct usb_attach_arg *uaa = device_get_ivars(dev);
DPRINTFN(11, "\n");
if (uaa->usb_mode != USB_MODE_HOST) {
return (ENXIO);
}
if (uaa->info.bConfigIndex != UCHCOM_CONFIG_INDEX) {
return (ENXIO);
}
if (uaa->info.bIfaceIndex != UCHCOM_IFACE_INDEX) {
return (ENXIO);
}
return (usbd_lookup_id_by_uaa(uchcom_devs, sizeof(uchcom_devs), uaa));
}
static int
uchcom_attach(device_t dev)
{
struct uchcom_softc *sc = device_get_softc(dev);
struct usb_attach_arg *uaa = device_get_ivars(dev);
int error;
uint8_t iface_index;
DPRINTFN(11, "\n");
device_set_usb_desc(dev);
mtx_init(&sc->sc_mtx, "uchcom", NULL, MTX_DEF);
sc->sc_udev = uaa->device;
switch (uaa->info.bcdDevice) {
case UCHCOM_REV_CH340:
device_printf(dev, "CH340 detected\n");
break;
default:
device_printf(dev, "CH341 detected\n");
break;
}
iface_index = UCHCOM_IFACE_INDEX;
error = usbd_transfer_setup(uaa->device,
&iface_index, sc->sc_xfer, uchcom_config_data,
UCHCOM_N_TRANSFER, sc, &sc->sc_mtx);
if (error) {
DPRINTF("one or more missing USB endpoints, "
"error=%s\n", usbd_errstr(error));
goto detach;
}
/* clear stall at first run */
mtx_lock(&sc->sc_mtx);
usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_DT_WR]);
usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_DT_RD]);
mtx_unlock(&sc->sc_mtx);
error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
&uchcom_callback, &sc->sc_mtx);
if (error) {
goto detach;
}
ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
return (0);
detach:
uchcom_detach(dev);
return (ENXIO);
}
static int
uchcom_detach(device_t dev)
{
struct uchcom_softc *sc = device_get_softc(dev);
DPRINTFN(11, "\n");
ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
usbd_transfer_unsetup(sc->sc_xfer, UCHCOM_N_TRANSFER);
mtx_destroy(&sc->sc_mtx);
return (0);
}
/* ----------------------------------------------------------------------
* low level i/o
*/
static void
uchcom_ctrl_write(struct uchcom_softc *sc, uint8_t reqno,
uint16_t value, uint16_t index)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = reqno;
USETW(req.wValue, value);
USETW(req.wIndex, index);
USETW(req.wLength, 0);
ucom_cfg_do_request(sc->sc_udev,
&sc->sc_ucom, &req, NULL, 0, 1000);
}
static void
uchcom_ctrl_read(struct uchcom_softc *sc, uint8_t reqno,
uint16_t value, uint16_t index, void *buf, uint16_t buflen)
{
struct usb_device_request req;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = reqno;
USETW(req.wValue, value);
USETW(req.wIndex, index);
USETW(req.wLength, buflen);
ucom_cfg_do_request(sc->sc_udev,
&sc->sc_ucom, &req, buf, USB_SHORT_XFER_OK, 1000);
}
static void
uchcom_write_reg(struct uchcom_softc *sc,
uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2)
{
DPRINTF("0x%02X<-0x%02X, 0x%02X<-0x%02X\n",
(unsigned)reg1, (unsigned)val1,
(unsigned)reg2, (unsigned)val2);
uchcom_ctrl_write(
sc, UCHCOM_REQ_WRITE_REG,
reg1 | ((uint16_t)reg2 << 8), val1 | ((uint16_t)val2 << 8));
}
static void
uchcom_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];
uchcom_ctrl_read(
sc, UCHCOM_REQ_READ_REG,
reg1 | ((uint16_t)reg2 << 8), 0, buf, sizeof(buf));
DPRINTF("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];
}
static void
uchcom_get_version(struct uchcom_softc *sc, uint8_t *rver)
{
uint8_t buf[UCHCOM_INPUT_BUF_SIZE];
uchcom_ctrl_read(sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf));
if (rver)
*rver = buf[0];
}
static void
uchcom_get_status(struct uchcom_softc *sc, uint8_t *rval)
{
uchcom_read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL);
}
static void
uchcom_set_dtr_rts_10(struct uchcom_softc *sc, uint8_t val)
{
uchcom_write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val);
}
static void
uchcom_set_dtr_rts_20(struct uchcom_softc *sc, uint8_t val)
{
uchcom_ctrl_write(sc, UCHCOM_REQ_SET_DTRRTS, val, 0);
}
/* ----------------------------------------------------------------------
* middle layer
*/
static void
uchcom_update_version(struct uchcom_softc *sc)
{
uchcom_get_version(sc, &sc->sc_version);
}
static void
uchcom_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 void
uchcom_update_status(struct uchcom_softc *sc)
{
uint8_t cur;
uchcom_get_status(sc, &cur);
uchcom_convert_status(sc, cur);
}
static void
uchcom_set_dtr_rts(struct uchcom_softc *sc)
{
uint8_t val = 0;
if (sc->sc_dtr)
val |= UCHCOM_DTR_MASK;
if (sc->sc_rts)
val |= UCHCOM_RTS_MASK;
if (sc->sc_version < UCHCOM_VER_20)
uchcom_set_dtr_rts_10(sc, ~val);
else
uchcom_set_dtr_rts_20(sc, ~val);
}
static void
uchcom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
{
struct uchcom_softc *sc = ucom->sc_parent;
uint8_t brk1;
uint8_t brk2;
uchcom_read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2);
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;
}
uchcom_write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2);
}
static int
uchcom_calc_divider_settings(struct uchcom_divider *dp, uint32_t rate)
{
const struct uchcom_divider_record *rp;
uint32_t div;
uint32_t rem;
uint32_t mod;
uint8_t i;
/* 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 + 0xFF) / 0x100;
return (0);
}
static void
uchcom_set_baudrate(struct uchcom_softc *sc, uint32_t rate)
{
struct uchcom_divider dv;
if (uchcom_calc_divider_settings(&dv, rate))
return;
uchcom_write_reg(sc,
UCHCOM_REG_BPS_PRE, dv.dv_prescaler,
UCHCOM_REG_BPS_DIV, dv.dv_div);
uchcom_write_reg(sc,
UCHCOM_REG_BPS_MOD, dv.dv_mod,
UCHCOM_REG_BPS_PAD, 0);
}
/* ----------------------------------------------------------------------
* methods for ucom
*/
static void
uchcom_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr)
{
struct uchcom_softc *sc = ucom->sc_parent;
DPRINTF("\n");
*lsr = sc->sc_lsr;
*msr = sc->sc_msr;
}
static void
uchcom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
{
struct uchcom_softc *sc = ucom->sc_parent;
DPRINTF("onoff = %d\n", onoff);
sc->sc_dtr = onoff;
uchcom_set_dtr_rts(sc);
}
static void
uchcom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
{
struct uchcom_softc *sc = ucom->sc_parent;
DPRINTF("onoff = %d\n", onoff);
sc->sc_rts = onoff;
uchcom_set_dtr_rts(sc);
}
static void
uchcom_cfg_open(struct ucom_softc *ucom)
{
struct uchcom_softc *sc = ucom->sc_parent;
DPRINTF("\n");
uchcom_update_version(sc);
uchcom_update_status(sc);
}
static int
uchcom_pre_param(struct ucom_softc *ucom, struct termios *t)
{
struct uchcom_divider dv;
switch (t->c_cflag & CSIZE) {
case CS8:
break;
default:
return (EIO);
}
if (uchcom_calc_divider_settings(&dv, t->c_ospeed)) {
return (EIO);
}
return (0); /* success */
}
static void
uchcom_cfg_param(struct ucom_softc *ucom, struct termios *t)
{
struct uchcom_softc *sc = ucom->sc_parent;
uchcom_get_version(sc, 0);
uchcom_ctrl_write(sc, UCHCOM_REQ_RESET, 0, 0);
uchcom_set_baudrate(sc, t->c_ospeed);
uchcom_read_reg(sc, 0x18, 0, 0x25, 0);
uchcom_write_reg(sc, 0x18, 0x50, 0x25, 0x00);
uchcom_update_status(sc);
uchcom_ctrl_write(sc, UCHCOM_REQ_RESET, 0x501f, 0xd90a);
uchcom_set_baudrate(sc, t->c_ospeed);
uchcom_set_dtr_rts(sc);
uchcom_update_status(sc);
}
static void
uchcom_start_read(struct ucom_softc *ucom)
{
struct uchcom_softc *sc = ucom->sc_parent;
/* start interrupt endpoint */
usbd_transfer_start(sc->sc_xfer[UCHCOM_INTR_DT_RD]);
/* start read endpoint */
usbd_transfer_start(sc->sc_xfer[UCHCOM_BULK_DT_RD]);
}
static void
uchcom_stop_read(struct ucom_softc *ucom)
{
struct uchcom_softc *sc = ucom->sc_parent;
/* stop interrupt endpoint */
usbd_transfer_stop(sc->sc_xfer[UCHCOM_INTR_DT_RD]);
/* stop read endpoint */
usbd_transfer_stop(sc->sc_xfer[UCHCOM_BULK_DT_RD]);
}
static void
uchcom_start_write(struct ucom_softc *ucom)
{
struct uchcom_softc *sc = ucom->sc_parent;
usbd_transfer_start(sc->sc_xfer[UCHCOM_BULK_DT_WR]);
}
static void
uchcom_stop_write(struct ucom_softc *ucom)
{
struct uchcom_softc *sc = ucom->sc_parent;
usbd_transfer_stop(sc->sc_xfer[UCHCOM_BULK_DT_WR]);
}
/* ----------------------------------------------------------------------
* callback when the modem status is changed.
*/
static void
uchcom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct uchcom_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
uint8_t buf[UCHCOM_INTR_LEAST];
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
DPRINTF("actlen = %u\n", actlen);
if (actlen >= UCHCOM_INTR_LEAST) {
pc = usbd_xfer_get_frame(xfer, 0);
usbd_copy_out(pc, 0, buf, UCHCOM_INTR_LEAST);
DPRINTF("data = 0x%02X 0x%02X 0x%02X 0x%02X\n",
(unsigned)buf[0], (unsigned)buf[1],
(unsigned)buf[2], (unsigned)buf[3]);
uchcom_convert_status(sc, buf[UCHCOM_INTR_STAT1]);
ucom_status_change(&sc->sc_ucom);
}
case USB_ST_SETUP:
tr_setup:
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
}
static void
uchcom_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct uchcom_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
uint32_t actlen;
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
case USB_ST_TRANSFERRED:
tr_setup:
pc = usbd_xfer_get_frame(xfer, 0);
if (ucom_get_data(&sc->sc_ucom, pc, 0,
usbd_xfer_max_len(xfer), &actlen)) {
DPRINTF("actlen = %d\n", actlen);
usbd_xfer_set_frame_len(xfer, 0, actlen);
usbd_transfer_submit(xfer);
}
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
}
static void
uchcom_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct uchcom_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
if (actlen > 0) {
pc = usbd_xfer_get_frame(xfer, 0);
ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
}
case USB_ST_SETUP:
tr_setup:
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
}
static void
uchcom_poll(struct ucom_softc *ucom)
{
struct uchcom_softc *sc = ucom->sc_parent;
usbd_transfer_poll(sc->sc_xfer, UCHCOM_N_TRANSFER);
}
static device_method_t uchcom_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, uchcom_probe),
DEVMETHOD(device_attach, uchcom_attach),
DEVMETHOD(device_detach, uchcom_detach),
{0, 0}
};
static driver_t uchcom_driver = {
.name = "ucom",
.methods = uchcom_methods,
.size = sizeof(struct uchcom_softc)
};
static devclass_t uchcom_devclass;
DRIVER_MODULE(uchcom, uhub, uchcom_driver, uchcom_devclass, NULL, 0);
MODULE_DEPEND(uchcom, ucom, 1, 1, 1);
MODULE_DEPEND(uchcom, usb, 1, 1, 1);
MODULE_VERSION(uchcom, 1);