/* $NetBSD: uchcom.c,v 1.1 2007/09/03 17:57:37 tshiozak Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-2-Clause-NetBSD * * 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. * * 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 __FBSDID("$FreeBSD$"); /* * Driver for WinChipHead CH341/340, the worst USB-serial chip in the * world. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "usbdevs.h" #define USB_DEBUG_VAR uchcom_debug #include #include #include #ifdef USB_DEBUG static int uchcom_debug = 0; static SYSCTL_NODE(_hw_usb, OID_AUTO, uchcom, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "USB uchcom"); SYSCTL_INT(_hw_usb_uchcom, OID_AUTO, debug, CTLFLAG_RWTUN, &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_LCR1 0x18 #define UCHCOM_REG_LCR2 0x25 #define UCHCOM_VER_20 0x20 #define UCHCOM_VER_30 0x30 #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_BRK_MASK 0x01 #define UCHCOM_LCR1_MASK 0xAF #define UCHCOM_LCR2_MASK 0x07 #define UCHCOM_LCR1_RX 0x80 #define UCHCOM_LCR1_TX 0x40 #define UCHCOM_LCR1_PARENB 0x08 #define UCHCOM_LCR1_CS8 0x03 #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 nitems(dividers) 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)}, {USB_VPI(USB_VENDOR_WCH2, USB_PRODUCT_WCH2_CH341SER_2, 0)}, {USB_VPI(USB_VENDOR_WCH2, USB_PRODUCT_WCH2_CH341SER_3, 0)}, }; /* protypes */ static void uchcom_free(struct ucom_softc *); 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 void uchcom_free_softc(struct uchcom_softc *); 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, .ucom_free = &uchcom_free, }; /* ---------------------------------------------------------------------- * 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); ucom_ref(&sc->sc_super_ucom); sc->sc_udev = uaa->device; switch (uaa->info.idProduct) { case USB_PRODUCT_WCH2_CH341SER: device_printf(dev, "CH340 detected\n"); break; case USB_PRODUCT_WCH2_CH341SER_2: case USB_PRODUCT_WCH2_CH341SER_3: device_printf(dev, "CH341 detected\n"); break; default: device_printf(dev, "New CH340/CH341 product 0x%04x detected\n", uaa->info.idProduct); 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); device_claim_softc(dev); uchcom_free_softc(sc); return (0); } UCOM_UNLOAD_DRAIN(uchcom); static void uchcom_free_softc(struct uchcom_softc *sc) { if (ucom_unref(&sc->sc_super_ucom)) { mtx_destroy(&sc->sc_mtx); device_free_softc(sc); } } static void uchcom_free(struct ucom_softc *ucom) { uchcom_free_softc(ucom->sc_parent); } /* ---------------------------------------------------------------------- * 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); DPRINTF("WR REQ 0x%02X VAL 0x%04X IDX 0x%04X\n", reqno, value, index); 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); DPRINTF("RD REQ 0x%02X VAL 0x%04X IDX 0x%04X LEN %d\n", reqno, value, index, 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); DPRINTF("Chip version: 0x%02x\n", 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_LCR1, &brk2); if (onoff) { /* on - clear bits */ brk1 &= ~UCHCOM_BRK_MASK; brk2 &= ~UCHCOM_LCR1_TX; } else { /* off - set bits */ brk1 |= UCHCOM_BRK_MASK; brk2 |= UCHCOM_LCR1_TX; } uchcom_write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_LCR1, 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; /* * According to linux code we need to set bit 7 of UCHCOM_REG_BPS_PRE, * otherwise the chip will buffer data. */ uchcom_write_reg(sc, UCHCOM_REG_BPS_PRE, dv.dv_prescaler | 0x80, 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"); /* XXX Note: sc_lsr is always zero */ *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 ((t->c_cflag & CSTOPB) != 0) return (EIO); if ((t->c_cflag & PARENB) != 0) 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, NULL); uchcom_ctrl_write(sc, UCHCOM_REQ_RESET, 0, 0); uchcom_set_baudrate(sc, t->c_ospeed); if (sc->sc_version < UCHCOM_VER_30) { uchcom_read_reg(sc, UCHCOM_REG_LCR1, NULL, UCHCOM_REG_LCR2, NULL); uchcom_write_reg(sc, UCHCOM_REG_LCR1, 0x50, UCHCOM_REG_LCR2, 0x00); } else { /* * Set up line control: * - enable transmit and receive * - set 8n1 mode * To do: support other sizes, parity, stop bits. */ uchcom_write_reg(sc, UCHCOM_REG_LCR1, UCHCOM_LCR1_RX | UCHCOM_LCR1_TX | UCHCOM_LCR1_CS8, UCHCOM_REG_LCR2, 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), DEVMETHOD_END }; static driver_t uchcom_driver = { .name = "uchcom", .methods = uchcom_methods, .size = sizeof(struct uchcom_softc) }; DRIVER_MODULE(uchcom, uhub, uchcom_driver, NULL, NULL); MODULE_DEPEND(uchcom, ucom, 1, 1, 1); MODULE_DEPEND(uchcom, usb, 1, 1, 1); MODULE_VERSION(uchcom, 1); USB_PNP_HOST_INFO(uchcom_devs);