1042 lines
23 KiB
C
1042 lines
23 KiB
C
/* $NetBSD: uchcom.c,v 1.10 2010/11/03 22:34:23 dyoung Exp $ */
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/*
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* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Takuya SHIOZAKI (tshiozak@netbsd.org).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uchcom.c,v 1.10 2010/11/03 22:34:23 dyoung Exp $");
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/*
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* driver for WinChipHead CH341/340, the worst USB-serial chip in the world.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/ioctl.h>
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#include <sys/conf.h>
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#include <sys/tty.h>
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#include <sys/file.h>
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#include <sys/select.h>
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#include <sys/proc.h>
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#include <sys/device.h>
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#include <sys/poll.h>
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#include <sys/workqueue.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbcdc.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdi_util.h>
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#include <dev/usb/usbdevs.h>
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#include <dev/usb/usb_quirks.h>
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#include <dev/usb/ucomvar.h>
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#ifdef UCHCOM_DEBUG
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#define DPRINTFN(n, x) if (uchcomdebug > (n)) printf x
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int uchcomdebug = 0;
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#else
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#define DPRINTFN(n, x)
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#endif
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#define DPRINTF(x) DPRINTFN(0, x)
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#define UCHCOM_IFACE_INDEX 0
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#define UCHCOM_CONFIG_INDEX 0
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#define UCHCOM_REV_CH340 0x0250
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#define UCHCOM_INPUT_BUF_SIZE 8
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#define UCHCOM_REQ_GET_VERSION 0x5F
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#define UCHCOM_REQ_READ_REG 0x95
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#define UCHCOM_REQ_WRITE_REG 0x9A
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#define UCHCOM_REQ_RESET 0xA1
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#define UCHCOM_REQ_SET_DTRRTS 0xA4
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#define UCHCOM_REG_STAT1 0x06
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#define UCHCOM_REG_STAT2 0x07
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#define UCHCOM_REG_BPS_PRE 0x12
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#define UCHCOM_REG_BPS_DIV 0x13
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#define UCHCOM_REG_BPS_MOD 0x14
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#define UCHCOM_REG_BPS_PAD 0x0F
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#define UCHCOM_REG_BREAK1 0x05
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#define UCHCOM_REG_BREAK2 0x18
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#define UCHCOM_REG_LCR1 0x18
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#define UCHCOM_REG_LCR2 0x25
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#define UCHCOM_VER_20 0x20
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#define UCHCOM_BASE_UNKNOWN 0
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#define UCHCOM_BPS_MOD_BASE 20000000
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#define UCHCOM_BPS_MOD_BASE_OFS 1100
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#define UCHCOM_DTR_MASK 0x20
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#define UCHCOM_RTS_MASK 0x40
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#define UCHCOM_BRK1_MASK 0x01
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#define UCHCOM_BRK2_MASK 0x40
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#define UCHCOM_LCR1_MASK 0xAF
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#define UCHCOM_LCR2_MASK 0x07
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#define UCHCOM_LCR1_PARENB 0x80
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#define UCHCOM_LCR2_PAREVEN 0x07
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#define UCHCOM_LCR2_PARODD 0x06
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#define UCHCOM_LCR2_PARMARK 0x05
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#define UCHCOM_LCR2_PARSPACE 0x04
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#define UCHCOM_INTR_STAT1 0x02
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#define UCHCOM_INTR_STAT2 0x03
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#define UCHCOM_INTR_LEAST 4
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#define UCHCOMIBUFSIZE 256
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#define UCHCOMOBUFSIZE 256
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struct uchcom_softc
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{
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device_t sc_dev;
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usbd_device_handle sc_udev;
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device_t sc_subdev;
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usbd_interface_handle sc_iface;
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int sc_dying;
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/* */
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int sc_intr_endpoint;
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int sc_intr_size;
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usbd_pipe_handle sc_intr_pipe;
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u_char *sc_intr_buf;
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/* */
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uint8_t sc_version;
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int sc_dtr;
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int sc_rts;
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u_char sc_lsr;
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u_char sc_msr;
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int sc_lcr1;
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int sc_lcr2;
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};
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struct uchcom_endpoints
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{
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int ep_bulkin;
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int ep_bulkout;
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int ep_intr;
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int ep_intr_size;
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};
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struct uchcom_divider
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{
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uint8_t dv_prescaler;
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uint8_t dv_div;
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uint8_t dv_mod;
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};
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struct uchcom_divider_record
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{
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uint32_t dvr_high;
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uint32_t dvr_low;
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uint32_t dvr_base_clock;
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struct uchcom_divider dvr_divider;
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};
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static const struct uchcom_divider_record dividers[] =
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{
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{ 307200, 307200, UCHCOM_BASE_UNKNOWN, { 7, 0xD9, 0 } },
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{ 921600, 921600, UCHCOM_BASE_UNKNOWN, { 7, 0xF3, 0 } },
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{ 2999999, 23530, 6000000, { 3, 0, 0 } },
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{ 23529, 2942, 750000, { 2, 0, 0 } },
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{ 2941, 368, 93750, { 1, 0, 0 } },
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{ 367, 1, 11719, { 0, 0, 0 } },
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};
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#define NUM_DIVIDERS (sizeof (dividers) / sizeof (dividers[0]))
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static const struct usb_devno uchcom_devs[] = {
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{ USB_VENDOR_WINCHIPHEAD, USB_PRODUCT_WINCHIPHEAD_CH341SER },
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{ USB_VENDOR_WINCHIPHEAD2, USB_PRODUCT_WINCHIPHEAD2_CH341 },
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};
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#define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p)
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Static void uchcom_get_status(void *, int, u_char *, u_char *);
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Static void uchcom_set(void *, int, int, int);
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Static int uchcom_param(void *, int, struct termios *);
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Static int uchcom_open(void *, int);
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Static void uchcom_close(void *, int);
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Static void uchcom_intr(usbd_xfer_handle, usbd_private_handle,
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usbd_status);
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static int set_config(struct uchcom_softc *);
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static int find_ifaces(struct uchcom_softc *, usbd_interface_handle *);
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static int find_endpoints(struct uchcom_softc *,
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struct uchcom_endpoints *);
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static void close_intr_pipe(struct uchcom_softc *);
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struct ucom_methods uchcom_methods = {
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.ucom_get_status = uchcom_get_status,
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.ucom_set = uchcom_set,
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.ucom_param = uchcom_param,
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.ucom_ioctl = NULL,
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.ucom_open = uchcom_open,
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.ucom_close = uchcom_close,
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.ucom_read = NULL,
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.ucom_write = NULL,
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};
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int uchcom_match(device_t, cfdata_t, void *);
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void uchcom_attach(device_t, device_t, void *);
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void uchcom_childdet(device_t, device_t);
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int uchcom_detach(device_t, int);
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int uchcom_activate(device_t, enum devact);
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extern struct cfdriver uchcom_cd;
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CFATTACH_DECL2_NEW(uchcom,
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sizeof(struct uchcom_softc),
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uchcom_match,
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uchcom_attach,
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uchcom_detach,
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uchcom_activate,
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NULL,
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uchcom_childdet);
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/* ----------------------------------------------------------------------
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* driver entry points
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*/
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int
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uchcom_match(device_t parent, cfdata_t match, void *aux)
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{
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struct usb_attach_arg *uaa = aux;
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return (uchcom_lookup(uaa->vendor, uaa->product) != NULL ?
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UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
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}
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void
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uchcom_attach(device_t parent, device_t self, void *aux)
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{
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struct uchcom_softc *sc = device_private(self);
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struct usb_attach_arg *uaa = aux;
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usbd_device_handle dev = uaa->device;
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char *devinfop;
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struct uchcom_endpoints endpoints;
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struct ucom_attach_args uca;
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aprint_naive("\n");
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aprint_normal("\n");
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devinfop = usbd_devinfo_alloc(dev, 0);
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aprint_normal_dev(self, "%s\n", devinfop);
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usbd_devinfo_free(devinfop);
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sc->sc_dev = self;
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sc->sc_udev = dev;
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sc->sc_dying = 0;
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sc->sc_dtr = sc->sc_rts = -1;
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sc->sc_lsr = sc->sc_msr = 0;
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DPRINTF(("\n\nuchcom attach: sc=%p\n", sc));
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if (set_config(sc))
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goto failed;
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switch (uaa->release) {
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case UCHCOM_REV_CH340:
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aprint_normal_dev(self, "CH340 detected\n");
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break;
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default:
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aprint_normal_dev(self, "CH341 detected\n");
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break;
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}
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if (find_ifaces(sc, &sc->sc_iface))
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goto failed;
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if (find_endpoints(sc, &endpoints))
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goto failed;
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sc->sc_intr_endpoint = endpoints.ep_intr;
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sc->sc_intr_size = endpoints.ep_intr_size;
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/* setup ucom layer */
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uca.portno = UCOM_UNK_PORTNO;
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uca.bulkin = endpoints.ep_bulkin;
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uca.bulkout = endpoints.ep_bulkout;
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uca.ibufsize = UCHCOMIBUFSIZE;
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uca.obufsize = UCHCOMOBUFSIZE;
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uca.ibufsizepad = UCHCOMIBUFSIZE;
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uca.opkthdrlen = 0;
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uca.device = dev;
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uca.iface = sc->sc_iface;
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uca.methods = &uchcom_methods;
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uca.arg = sc;
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uca.info = NULL;
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usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
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sc->sc_dev);
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sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &uca,
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ucomprint, ucomsubmatch);
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return;
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failed:
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sc->sc_dying = 1;
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return;
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}
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void
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uchcom_childdet(device_t self, device_t child)
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{
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struct uchcom_softc *sc = device_private(self);
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KASSERT(sc->sc_subdev == child);
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sc->sc_subdev = NULL;
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}
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int
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uchcom_detach(device_t self, int flags)
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{
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struct uchcom_softc *sc = device_private(self);
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int rv = 0;
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DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags));
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close_intr_pipe(sc);
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sc->sc_dying = 1;
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if (sc->sc_subdev != NULL)
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rv = config_detach(sc->sc_subdev, flags);
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usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
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sc->sc_dev);
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return rv;
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}
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int
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uchcom_activate(device_t self, enum devact act)
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{
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struct uchcom_softc *sc = device_private(self);
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switch (act) {
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case DVACT_DEACTIVATE:
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close_intr_pipe(sc);
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sc->sc_dying = 1;
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return 0;
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default:
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return EOPNOTSUPP;
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}
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}
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static int
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set_config(struct uchcom_softc *sc)
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{
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usbd_status err;
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err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1);
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if (err) {
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aprint_error_dev(sc->sc_dev,
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"failed to set configuration: %s\n", usbd_errstr(err));
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return -1;
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}
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return 0;
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}
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static int
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find_ifaces(struct uchcom_softc *sc, usbd_interface_handle *riface)
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{
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usbd_status err;
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err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX,
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riface);
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if (err) {
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aprint_error("\n%s: failed to get interface: %s\n",
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device_xname(sc->sc_dev), usbd_errstr(err));
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return -1;
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}
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return 0;
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}
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static int
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find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints)
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{
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int i, bin=-1, bout=-1, intr=-1, isize=0;
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usb_interface_descriptor_t *id;
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usb_endpoint_descriptor_t *ed;
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id = usbd_get_interface_descriptor(sc->sc_iface);
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for (i = 0; i < id->bNumEndpoints; i++) {
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ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
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if (ed == NULL) {
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aprint_error_dev(sc->sc_dev,
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"no endpoint descriptor for %d\n", i);
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return -1;
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}
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if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
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UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
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intr = ed->bEndpointAddress;
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isize = UGETW(ed->wMaxPacketSize);
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} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
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UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
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bin = ed->bEndpointAddress;
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} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
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UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
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bout = ed->bEndpointAddress;
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}
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}
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if (intr == -1 || bin == -1 || bout == -1) {
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if (intr == -1) {
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aprint_error_dev(sc->sc_dev,
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"no interrupt end point\n");
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}
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if (bin == -1) {
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aprint_error_dev(sc->sc_dev,
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"no data bulk in end point\n");
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}
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if (bout == -1) {
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aprint_error_dev(sc->sc_dev,
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"no data bulk out end point\n");
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}
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return -1;
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}
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if (isize < UCHCOM_INTR_LEAST) {
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aprint_error_dev(sc->sc_dev, "intr pipe is too short\n");
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return -1;
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}
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DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n",
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device_xname(sc->sc_dev), bin, bout, intr, isize));
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endpoints->ep_intr = intr;
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endpoints->ep_intr_size = isize;
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endpoints->ep_bulkin = bin;
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endpoints->ep_bulkout = bout;
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return 0;
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}
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/* ----------------------------------------------------------------------
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* low level i/o
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*/
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static __inline usbd_status
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generic_control_out(struct uchcom_softc *sc, uint8_t reqno,
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uint16_t value, uint16_t index)
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{
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usb_device_request_t req;
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req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
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req.bRequest = reqno;
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USETW(req.wValue, value);
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USETW(req.wIndex, index);
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USETW(req.wLength, 0);
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return usbd_do_request(sc->sc_udev, &req, 0);
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}
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static __inline usbd_status
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generic_control_in(struct uchcom_softc *sc, uint8_t reqno,
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uint16_t value, uint16_t index, void *buf, int buflen,
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int *actlen)
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{
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usb_device_request_t req;
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req.bmRequestType = UT_READ_VENDOR_DEVICE;
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req.bRequest = reqno;
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USETW(req.wValue, value);
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USETW(req.wIndex, index);
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USETW(req.wLength, (uint16_t)buflen);
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return usbd_do_request_flags(sc->sc_udev, &req, buf,
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USBD_SHORT_XFER_OK, actlen,
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USBD_DEFAULT_TIMEOUT);
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}
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static __inline usbd_status
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write_reg(struct uchcom_softc *sc,
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uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2)
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{
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DPRINTF(("uchcom: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n",
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(unsigned)reg1, (unsigned)val1,
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(unsigned)reg2, (unsigned)val2));
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return generic_control_out(
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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", device_xname(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",
|
|
device_xname(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",
|
|
device_xname(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",
|
|
device_xname(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",
|
|
device_xname(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));
|
|
}
|