790 lines
17 KiB
C
790 lines
17 KiB
C
/*
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* dscore.c
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*
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* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/mod_devicetable.h>
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#include <linux/usb.h>
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#include "dscore.h"
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static struct usb_device_id ds_id_table [] = {
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{ USB_DEVICE(0x04fa, 0x2490) },
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{ },
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};
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MODULE_DEVICE_TABLE(usb, ds_id_table);
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int ds_probe(struct usb_interface *, const struct usb_device_id *);
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void ds_disconnect(struct usb_interface *);
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int ds_touch_bit(struct ds_device *, u8, u8 *);
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int ds_read_byte(struct ds_device *, u8 *);
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int ds_read_bit(struct ds_device *, u8 *);
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int ds_write_byte(struct ds_device *, u8);
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int ds_write_bit(struct ds_device *, u8);
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int ds_start_pulse(struct ds_device *, int);
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int ds_set_speed(struct ds_device *, int);
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int ds_reset(struct ds_device *, struct ds_status *);
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int ds_detect(struct ds_device *, struct ds_status *);
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int ds_stop_pulse(struct ds_device *, int);
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struct ds_device * ds_get_device(void);
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void ds_put_device(struct ds_device *);
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static inline void ds_dump_status(unsigned char *, unsigned char *, int);
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static int ds_send_control(struct ds_device *, u16, u16);
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static int ds_send_control_mode(struct ds_device *, u16, u16);
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static int ds_send_control_cmd(struct ds_device *, u16, u16);
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static struct usb_driver ds_driver = {
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.owner = THIS_MODULE,
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.name = "DS9490R",
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.probe = ds_probe,
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.disconnect = ds_disconnect,
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.id_table = ds_id_table,
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};
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static struct ds_device *ds_dev;
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struct ds_device * ds_get_device(void)
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{
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if (ds_dev)
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atomic_inc(&ds_dev->refcnt);
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return ds_dev;
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}
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void ds_put_device(struct ds_device *dev)
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{
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atomic_dec(&dev->refcnt);
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}
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static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index)
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{
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int err;
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err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
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CONTROL_CMD, 0x40, value, index, NULL, 0, 1000);
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if (err < 0) {
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printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n",
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value, index, err);
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return err;
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}
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return err;
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}
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static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index)
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{
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int err;
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err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
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MODE_CMD, 0x40, value, index, NULL, 0, 1000);
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if (err < 0) {
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printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n",
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value, index, err);
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return err;
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}
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return err;
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}
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static int ds_send_control(struct ds_device *dev, u16 value, u16 index)
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{
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int err;
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err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
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COMM_CMD, 0x40, value, index, NULL, 0, 1000);
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if (err < 0) {
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printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n",
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value, index, err);
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return err;
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}
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return err;
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}
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static inline void ds_dump_status(unsigned char *buf, unsigned char *str, int off)
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{
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printk("%45s: %8x\n", str, buf[off]);
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}
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int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st, unsigned char *buf, int size)
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{
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int count, err;
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memset(st, 0, sizeof(st));
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count = 0;
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err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100);
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if (err < 0) {
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printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err);
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return err;
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}
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if (count >= sizeof(*st))
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memcpy(st, buf, sizeof(*st));
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return count;
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}
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static int ds_recv_status(struct ds_device *dev, struct ds_status *st)
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{
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unsigned char buf[64];
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int count, err = 0, i;
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memcpy(st, buf, sizeof(*st));
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count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
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if (count < 0)
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return err;
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printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);
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for (i=0; i<count; ++i)
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printk("%02x ", buf[i]);
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printk("\n");
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if (count >= 16) {
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ds_dump_status(buf, "enable flag", 0);
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ds_dump_status(buf, "1-wire speed", 1);
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ds_dump_status(buf, "strong pullup duration", 2);
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ds_dump_status(buf, "programming pulse duration", 3);
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ds_dump_status(buf, "pulldown slew rate control", 4);
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ds_dump_status(buf, "write-1 low time", 5);
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ds_dump_status(buf, "data sample offset/write-0 recovery time", 6);
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ds_dump_status(buf, "reserved (test register)", 7);
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ds_dump_status(buf, "device status flags", 8);
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ds_dump_status(buf, "communication command byte 1", 9);
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ds_dump_status(buf, "communication command byte 2", 10);
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ds_dump_status(buf, "communication command buffer status", 11);
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ds_dump_status(buf, "1-wire data output buffer status", 12);
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ds_dump_status(buf, "1-wire data input buffer status", 13);
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ds_dump_status(buf, "reserved", 14);
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ds_dump_status(buf, "reserved", 15);
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}
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memcpy(st, buf, sizeof(*st));
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if (st->status & ST_EPOF) {
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printk(KERN_INFO "Resetting device after ST_EPOF.\n");
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err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
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if (err)
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return err;
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count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
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if (count < 0)
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return err;
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}
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#if 0
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if (st->status & ST_IDLE) {
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printk(KERN_INFO "Resetting pulse after ST_IDLE.\n");
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err = ds_start_pulse(dev, PULLUP_PULSE_DURATION);
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if (err)
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return err;
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}
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#endif
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return err;
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}
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static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size)
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{
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int count, err;
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struct ds_status st;
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count = 0;
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err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]),
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buf, size, &count, 1000);
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if (err < 0) {
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printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);
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usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));
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ds_recv_status(dev, &st);
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return err;
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}
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#if 0
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{
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int i;
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printk("%s: count=%d: ", __func__, count);
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for (i=0; i<count; ++i)
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printk("%02x ", buf[i]);
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printk("\n");
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}
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#endif
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return count;
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}
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static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len)
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{
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int count, err;
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count = 0;
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err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000);
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if (err < 0) {
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printk(KERN_ERR "Failed to read 1-wire data from 0x02: err=%d.\n", err);
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return err;
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}
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return err;
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}
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int ds_stop_pulse(struct ds_device *dev, int limit)
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{
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struct ds_status st;
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int count = 0, err = 0;
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u8 buf[0x20];
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do {
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err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0);
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if (err)
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break;
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err = ds_send_control(dev, CTL_RESUME_EXE, 0);
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if (err)
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break;
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err = ds_recv_status_nodump(dev, &st, buf, sizeof(buf));
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if (err)
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break;
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if ((st.status & ST_SPUA) == 0) {
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err = ds_send_control_mode(dev, MOD_PULSE_EN, 0);
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if (err)
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break;
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}
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} while(++count < limit);
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return err;
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}
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int ds_detect(struct ds_device *dev, struct ds_status *st)
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{
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int err;
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err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
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if (err)
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return err;
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err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, 0);
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if (err)
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return err;
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err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM | COMM_TYPE, 0x40);
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if (err)
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return err;
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err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_PROG);
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if (err)
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return err;
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err = ds_recv_status(dev, st);
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return err;
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}
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int ds_wait_status(struct ds_device *dev, struct ds_status *st)
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{
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u8 buf[0x20];
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int err, count = 0;
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do {
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err = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
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#if 0
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if (err >= 0) {
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int i;
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printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err);
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for (i=0; i<err; ++i)
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printk("%02x ", buf[i]);
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printk("\n");
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}
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#endif
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} while(!(buf[0x08] & 0x20) && !(err < 0) && ++count < 100);
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if (((err > 16) && (buf[0x10] & 0x01)) || count >= 100 || err < 0) {
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ds_recv_status(dev, st);
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return -1;
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}
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else {
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return 0;
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}
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}
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int ds_reset(struct ds_device *dev, struct ds_status *st)
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{
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int err;
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//err = ds_send_control(dev, COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE, SPEED_FLEXIBLE);
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err = ds_send_control(dev, 0x43, SPEED_NORMAL);
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if (err)
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return err;
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ds_wait_status(dev, st);
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#if 0
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if (st->command_buffer_status) {
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printk(KERN_INFO "Short circuit.\n");
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return -EIO;
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}
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#endif
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return 0;
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}
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int ds_set_speed(struct ds_device *dev, int speed)
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{
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int err;
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if (speed != SPEED_NORMAL && speed != SPEED_FLEXIBLE && speed != SPEED_OVERDRIVE)
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return -EINVAL;
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if (speed != SPEED_OVERDRIVE)
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speed = SPEED_FLEXIBLE;
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speed &= 0xff;
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err = ds_send_control_mode(dev, MOD_1WIRE_SPEED, speed);
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if (err)
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return err;
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return err;
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}
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int ds_start_pulse(struct ds_device *dev, int delay)
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{
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int err;
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u8 del = 1 + (u8)(delay >> 4);
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struct ds_status st;
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#if 0
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err = ds_stop_pulse(dev, 10);
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if (err)
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return err;
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err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
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if (err)
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return err;
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#endif
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err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del);
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if (err)
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return err;
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err = ds_send_control(dev, COMM_PULSE | COMM_IM | COMM_F, 0);
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if (err)
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return err;
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mdelay(delay);
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ds_wait_status(dev, &st);
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return err;
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}
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int ds_touch_bit(struct ds_device *dev, u8 bit, u8 *tbit)
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{
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int err, count;
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struct ds_status st;
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u16 value = (COMM_BIT_IO | COMM_IM) | ((bit) ? COMM_D : 0);
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u16 cmd;
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err = ds_send_control(dev, value, 0);
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if (err)
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return err;
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count = 0;
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do {
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err = ds_wait_status(dev, &st);
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if (err)
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return err;
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cmd = st.command0 | (st.command1 << 8);
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} while (cmd != value && ++count < 10);
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if (err < 0 || count >= 10) {
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printk(KERN_ERR "Failed to obtain status.\n");
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return -EINVAL;
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}
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err = ds_recv_data(dev, tbit, sizeof(*tbit));
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if (err < 0)
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return err;
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return 0;
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}
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int ds_write_bit(struct ds_device *dev, u8 bit)
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{
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int err;
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struct ds_status st;
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err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | (bit) ? COMM_D : 0, 0);
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if (err)
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return err;
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ds_wait_status(dev, &st);
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return 0;
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}
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int ds_write_byte(struct ds_device *dev, u8 byte)
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{
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int err;
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struct ds_status st;
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u8 rbyte;
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err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | COMM_SPU, byte);
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if (err)
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return err;
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err = ds_wait_status(dev, &st);
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if (err)
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return err;
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err = ds_recv_data(dev, &rbyte, sizeof(rbyte));
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if (err < 0)
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return err;
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ds_start_pulse(dev, PULLUP_PULSE_DURATION);
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return !(byte == rbyte);
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}
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int ds_read_bit(struct ds_device *dev, u8 *bit)
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{
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int err;
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err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
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if (err)
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return err;
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err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | COMM_SPU | COMM_D, 0);
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if (err)
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return err;
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err = ds_recv_data(dev, bit, sizeof(*bit));
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if (err < 0)
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return err;
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return 0;
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}
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int ds_read_byte(struct ds_device *dev, u8 *byte)
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{
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int err;
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struct ds_status st;
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err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM , 0xff);
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if (err)
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return err;
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ds_wait_status(dev, &st);
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err = ds_recv_data(dev, byte, sizeof(*byte));
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if (err < 0)
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return err;
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return 0;
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}
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int ds_read_block(struct ds_device *dev, u8 *buf, int len)
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{
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struct ds_status st;
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int err;
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if (len > 64*1024)
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return -E2BIG;
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memset(buf, 0xFF, len);
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err = ds_send_data(dev, buf, len);
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if (err < 0)
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return err;
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err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
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if (err)
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return err;
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ds_wait_status(dev, &st);
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memset(buf, 0x00, len);
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err = ds_recv_data(dev, buf, len);
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return err;
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}
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int ds_write_block(struct ds_device *dev, u8 *buf, int len)
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{
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int err;
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struct ds_status st;
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err = ds_send_data(dev, buf, len);
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if (err < 0)
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return err;
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ds_wait_status(dev, &st);
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err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
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if (err)
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return err;
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|
|
ds_wait_status(dev, &st);
|
|
|
|
err = ds_recv_data(dev, buf, len);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
ds_start_pulse(dev, PULLUP_PULSE_DURATION);
|
|
|
|
return !(err == len);
|
|
}
|
|
|
|
int ds_search(struct ds_device *dev, u64 init, u64 *buf, u8 id_number, int conditional_search)
|
|
{
|
|
int err;
|
|
u16 value, index;
|
|
struct ds_status st;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
|
|
err = ds_send_data(ds_dev, (unsigned char *)&init, 8);
|
|
if (err)
|
|
return err;
|
|
|
|
ds_wait_status(ds_dev, &st);
|
|
|
|
value = COMM_SEARCH_ACCESS | COMM_IM | COMM_SM | COMM_F | COMM_RTS;
|
|
index = (conditional_search ? 0xEC : 0xF0) | (id_number << 8);
|
|
err = ds_send_control(ds_dev, value, index);
|
|
if (err)
|
|
return err;
|
|
|
|
ds_wait_status(ds_dev, &st);
|
|
|
|
err = ds_recv_data(ds_dev, (unsigned char *)buf, 8*id_number);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return err/8;
|
|
}
|
|
|
|
int ds_match_access(struct ds_device *dev, u64 init)
|
|
{
|
|
int err;
|
|
struct ds_status st;
|
|
|
|
err = ds_send_data(dev, (unsigned char *)&init, sizeof(init));
|
|
if (err)
|
|
return err;
|
|
|
|
ds_wait_status(dev, &st);
|
|
|
|
err = ds_send_control(dev, COMM_MATCH_ACCESS | COMM_IM | COMM_RST, 0x0055);
|
|
if (err)
|
|
return err;
|
|
|
|
ds_wait_status(dev, &st);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ds_set_path(struct ds_device *dev, u64 init)
|
|
{
|
|
int err;
|
|
struct ds_status st;
|
|
u8 buf[9];
|
|
|
|
memcpy(buf, &init, 8);
|
|
buf[8] = BRANCH_MAIN;
|
|
|
|
err = ds_send_data(dev, buf, sizeof(buf));
|
|
if (err)
|
|
return err;
|
|
|
|
ds_wait_status(dev, &st);
|
|
|
|
err = ds_send_control(dev, COMM_SET_PATH | COMM_IM | COMM_RST, 0);
|
|
if (err)
|
|
return err;
|
|
|
|
ds_wait_status(dev, &st);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ds_probe(struct usb_interface *intf, const struct usb_device_id *udev_id)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
struct usb_host_interface *iface_desc;
|
|
int i, err;
|
|
|
|
ds_dev = kmalloc(sizeof(struct ds_device), GFP_KERNEL);
|
|
if (!ds_dev) {
|
|
printk(KERN_INFO "Failed to allocate new DS9490R structure.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ds_dev->udev = usb_get_dev(udev);
|
|
usb_set_intfdata(intf, ds_dev);
|
|
|
|
err = usb_set_interface(ds_dev->udev, intf->altsetting[0].desc.bInterfaceNumber, 3);
|
|
if (err) {
|
|
printk(KERN_ERR "Failed to set alternative setting 3 for %d interface: err=%d.\n",
|
|
intf->altsetting[0].desc.bInterfaceNumber, err);
|
|
return err;
|
|
}
|
|
|
|
err = usb_reset_configuration(ds_dev->udev);
|
|
if (err) {
|
|
printk(KERN_ERR "Failed to reset configuration: err=%d.\n", err);
|
|
return err;
|
|
}
|
|
|
|
iface_desc = &intf->altsetting[0];
|
|
if (iface_desc->desc.bNumEndpoints != NUM_EP-1) {
|
|
printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints);
|
|
return -ENODEV;
|
|
}
|
|
|
|
atomic_set(&ds_dev->refcnt, 0);
|
|
memset(ds_dev->ep, 0, sizeof(ds_dev->ep));
|
|
|
|
/*
|
|
* This loop doesn'd show control 0 endpoint,
|
|
* so we will fill only 1-3 endpoints entry.
|
|
*/
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
|
|
ds_dev->ep[i+1] = endpoint->bEndpointAddress;
|
|
|
|
printk("%d: addr=%x, size=%d, dir=%s, type=%x\n",
|
|
i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize),
|
|
(endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT",
|
|
endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
|
|
}
|
|
|
|
#if 0
|
|
{
|
|
int err, i;
|
|
u64 buf[3];
|
|
u64 init=0xb30000002078ee81ull;
|
|
struct ds_status st;
|
|
|
|
ds_reset(ds_dev, &st);
|
|
err = ds_search(ds_dev, init, buf, 3, 0);
|
|
if (err < 0)
|
|
return err;
|
|
for (i=0; i<err; ++i)
|
|
printk("%d: %llx\n", i, buf[i]);
|
|
|
|
printk("Resetting...\n");
|
|
ds_reset(ds_dev, &st);
|
|
printk("Setting path for %llx.\n", init);
|
|
err = ds_set_path(ds_dev, init);
|
|
if (err)
|
|
return err;
|
|
printk("Calling MATCH_ACCESS.\n");
|
|
err = ds_match_access(ds_dev, init);
|
|
if (err)
|
|
return err;
|
|
|
|
printk("Searching the bus...\n");
|
|
err = ds_search(ds_dev, init, buf, 3, 0);
|
|
|
|
printk("ds_search() returned %d\n", err);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
for (i=0; i<err; ++i)
|
|
printk("%d: %llx\n", i, buf[i]);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ds_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct ds_device *dev;
|
|
|
|
dev = usb_get_intfdata(intf);
|
|
usb_set_intfdata(intf, NULL);
|
|
|
|
while (atomic_read(&dev->refcnt)) {
|
|
printk(KERN_INFO "Waiting for DS to become free: refcnt=%d.\n",
|
|
atomic_read(&dev->refcnt));
|
|
|
|
if (msleep_interruptible(1000))
|
|
flush_signals(current);
|
|
}
|
|
|
|
usb_put_dev(dev->udev);
|
|
kfree(dev);
|
|
ds_dev = NULL;
|
|
}
|
|
|
|
int ds_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = usb_register(&ds_driver);
|
|
if (err) {
|
|
printk(KERN_INFO "Failed to register DS9490R USB device: err=%d.\n", err);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ds_fini(void)
|
|
{
|
|
usb_deregister(&ds_driver);
|
|
}
|
|
|
|
module_init(ds_init);
|
|
module_exit(ds_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
|
|
|
|
EXPORT_SYMBOL(ds_touch_bit);
|
|
EXPORT_SYMBOL(ds_read_byte);
|
|
EXPORT_SYMBOL(ds_read_bit);
|
|
EXPORT_SYMBOL(ds_read_block);
|
|
EXPORT_SYMBOL(ds_write_byte);
|
|
EXPORT_SYMBOL(ds_write_bit);
|
|
EXPORT_SYMBOL(ds_write_block);
|
|
EXPORT_SYMBOL(ds_reset);
|
|
EXPORT_SYMBOL(ds_get_device);
|
|
EXPORT_SYMBOL(ds_put_device);
|
|
|
|
/*
|
|
* This functions can be used for EEPROM programming,
|
|
* when driver will be included into mainline this will
|
|
* require uncommenting.
|
|
*/
|
|
#if 0
|
|
EXPORT_SYMBOL(ds_start_pulse);
|
|
EXPORT_SYMBOL(ds_set_speed);
|
|
EXPORT_SYMBOL(ds_detect);
|
|
EXPORT_SYMBOL(ds_stop_pulse);
|
|
EXPORT_SYMBOL(ds_search);
|
|
#endif
|