[linux.git] / drivers / w1 / dscore.c

/*
 *	dscore.c
 *
 * Copyright (c) 2004 Evgeniy Polyakov <[email protected]>
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/usb.h>

#include "dscore.h"

static struct usb_device_id ds_id_table [] = {
	{ USB_DEVICE(0x04fa, 0x2490) },
	{ },
};
MODULE_DEVICE_TABLE(usb, ds_id_table);

static int ds_probe(struct usb_interface *, const struct usb_device_id *);
static void ds_disconnect(struct usb_interface *);

int ds_touch_bit(struct ds_device *, u8, u8 *);
int ds_read_byte(struct ds_device *, u8 *);
int ds_read_bit(struct ds_device *, u8 *);
int ds_write_byte(struct ds_device *, u8);
int ds_write_bit(struct ds_device *, u8);
static int ds_start_pulse(struct ds_device *, int);
int ds_reset(struct ds_device *, struct ds_status *);
struct ds_device * ds_get_device(void);
void ds_put_device(struct ds_device *);

static inline void ds_dump_status(unsigned char *, unsigned char *, int);
static int ds_send_control(struct ds_device *, u16, u16);
static int ds_send_control_mode(struct ds_device *, u16, u16);
static int ds_send_control_cmd(struct ds_device *, u16, u16);


static struct usb_driver ds_driver = {
	.name =		"DS9490R",
	.probe =	ds_probe,
	.disconnect =	ds_disconnect,
	.id_table =	ds_id_table,
};

static struct ds_device *ds_dev;

struct ds_device * ds_get_device(void)
{
	if (ds_dev)
		atomic_inc(&ds_dev->refcnt);
	return ds_dev;
}

void ds_put_device(struct ds_device *dev)
{
	atomic_dec(&dev->refcnt);
}

static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index)
{
	int err;

	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
			CONTROL_CMD, 0x40, value, index, NULL, 0, 1000);
	if (err < 0) {
		printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n",
				value, index, err);
		return err;
	}

	return err;
}

static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index)
{
	int err;

	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
			MODE_CMD, 0x40, value, index, NULL, 0, 1000);
	if (err < 0) {
		printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n",
				value, index, err);
		return err;
	}

	return err;
}

static int ds_send_control(struct ds_device *dev, u16 value, u16 index)
{
	int err;

	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
			COMM_CMD, 0x40, value, index, NULL, 0, 1000);
	if (err < 0) {
		printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n",
				value, index, err);
		return err;
	}

	return err;
}

static inline void ds_dump_status(unsigned char *buf, unsigned char *str, int off)
{
	printk("%45s: %8x\n", str, buf[off]);
}

static int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st,
				 unsigned char *buf, int size)
{
	int count, err;

	memset(st, 0, sizeof(st));

	count = 0;
	err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100);
	if (err < 0) {
		printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err);
		return err;
	}

	if (count >= sizeof(*st))
		memcpy(st, buf, sizeof(*st));

	return count;
}

static int ds_recv_status(struct ds_device *dev, struct ds_status *st)
{
	unsigned char buf[64];
	int count, err = 0, i;

	memcpy(st, buf, sizeof(*st));

	count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
	if (count < 0)
		return err;

	printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);
	for (i=0; i<count; ++i)
		printk("%02x ", buf[i]);
	printk("\n");

	if (count >= 16) {
		ds_dump_status(buf, "enable flag", 0);
		ds_dump_status(buf, "1-wire speed", 1);
		ds_dump_status(buf, "strong pullup duration", 2);
		ds_dump_status(buf, "programming pulse duration", 3);
		ds_dump_status(buf, "pulldown slew rate control", 4);
		ds_dump_status(buf, "write-1 low time", 5);
		ds_dump_status(buf, "data sample offset/write-0 recovery time", 6);
		ds_dump_status(buf, "reserved (test register)", 7);
		ds_dump_status(buf, "device status flags", 8);
		ds_dump_status(buf, "communication command byte 1", 9);
		ds_dump_status(buf, "communication command byte 2", 10);
		ds_dump_status(buf, "communication command buffer status", 11);
		ds_dump_status(buf, "1-wire data output buffer status", 12);
		ds_dump_status(buf, "1-wire data input buffer status", 13);
		ds_dump_status(buf, "reserved", 14);
		ds_dump_status(buf, "reserved", 15);
	}

	memcpy(st, buf, sizeof(*st));

	if (st->status & ST_EPOF) {
		printk(KERN_INFO "Resetting device after ST_EPOF.\n");
		err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
		if (err)
			return err;
		count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
		if (count < 0)
			return err;
	}
#if 0
	if (st->status & ST_IDLE) {
		printk(KERN_INFO "Resetting pulse after ST_IDLE.\n");
		err = ds_start_pulse(dev, PULLUP_PULSE_DURATION);
		if (err)
			return err;
	}
#endif

	return err;
}

static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size)
{
	int count, err;
	struct ds_status st;

	count = 0;
	err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]),
				buf, size, &count, 1000);
	if (err < 0) {
		printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);
		usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));
		ds_recv_status(dev, &st);
		return err;
	}

#if 0
	{
		int i;

		printk("%s: count=%d: ", __func__, count);
		for (i=0; i<count; ++i)
			printk("%02x ", buf[i]);
		printk("\n");
	}
#endif
	return count;
}

static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len)
{
	int count, err;

	count = 0;
	err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000);
	if (err < 0) {
		printk(KERN_ERR "Failed to read 1-wire data from 0x02: err=%d.\n", err);
		return err;
	}

	return err;
}

#if 0

int ds_stop_pulse(struct ds_device *dev, int limit)
{
	struct ds_status st;
	int count = 0, err = 0;
	u8 buf[0x20];

	do {
		err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0);
		if (err)
			break;
		err = ds_send_control(dev, CTL_RESUME_EXE, 0);
		if (err)
			break;
		err = ds_recv_status_nodump(dev, &st, buf, sizeof(buf));
		if (err)
			break;

		if ((st.status & ST_SPUA) == 0) {
			err = ds_send_control_mode(dev, MOD_PULSE_EN, 0);
			if (err)
				break;
		}
	} while(++count < limit);

	return err;
}

int ds_detect(struct ds_device *dev, struct ds_status *st)
{
	int err;

	err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
	if (err)
		return err;

	err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, 0);
	if (err)
		return err;

	err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM | COMM_TYPE, 0x40);
	if (err)
		return err;

	err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_PROG);
	if (err)
		return err;

	err = ds_recv_status(dev, st);

	return err;
}

#endif  /*  0  */

static int ds_wait_status(struct ds_device *dev, struct ds_status *st)
{
	u8 buf[0x20];
	int err, count = 0;

	do {
		err = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
#if 0
		if (err >= 0) {
			int i;
			printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err);
			for (i=0; i<err; ++i)
				printk("%02x ", buf[i]);
			printk("\n");
		}
#endif
	} while(!(buf[0x08] & 0x20) && !(err < 0) && ++count < 100);


	if (((err > 16) && (buf[0x10] & 0x01)) || count >= 100 || err < 0) {
		ds_recv_status(dev, st);
		return -1;
	} else
		return 0;
}

int ds_reset(struct ds_device *dev, struct ds_status *st)
{
	int err;

	//err = ds_send_control(dev, COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE, SPEED_FLEXIBLE);
	err = ds_send_control(dev, 0x43, SPEED_NORMAL);
	if (err)
		return err;

	ds_wait_status(dev, st);
#if 0
	if (st->command_buffer_status) {
		printk(KERN_INFO "Short circuit.\n");
		return -EIO;
	}
#endif
	
	return 0;
}

#if 0
int ds_set_speed(struct ds_device *dev, int speed)
{
	int err;
	
	if (speed != SPEED_NORMAL && speed != SPEED_FLEXIBLE && speed != SPEED_OVERDRIVE)
		return -EINVAL;

	if (speed != SPEED_OVERDRIVE)
		speed = SPEED_FLEXIBLE;

	speed &= 0xff;

	err = ds_send_control_mode(dev, MOD_1WIRE_SPEED, speed);
	if (err)
		return err;

	return err;
}
#endif  /*  0  */

static int ds_start_pulse(struct ds_device *dev, int delay)
{
	int err;
	u8 del = 1 + (u8)(delay >> 4);
	struct ds_status st;

#if 0
	err = ds_stop_pulse(dev, 10);
	if (err)
		return err;

	err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
	if (err)
		return err;
#endif
	err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del);
	if (err)
		return err;

	err = ds_send_control(dev, COMM_PULSE | COMM_IM | COMM_F, 0);
	if (err)
		return err;

	mdelay(delay);

	ds_wait_status(dev, &st);

	return err;
}

int ds_touch_bit(struct ds_device *dev, u8 bit, u8 *tbit)
{
	int err, count;
	struct ds_status st;
	u16 value = (COMM_BIT_IO | COMM_IM) | ((bit) ? COMM_D : 0);
	u16 cmd;

	err = ds_send_control(dev, value, 0);
	if (err)
		return err;

	count = 0;
	do {
		err = ds_wait_status(dev, &st);
		if (err)
			return err;

		cmd = st.command0 | (st.command1 << 8);
	} while (cmd != value && ++count < 10);

	if (err < 0 || count >= 10) {
		printk(KERN_ERR "Failed to obtain status.\n");
		return -EINVAL;
	}

	err = ds_recv_data(dev, tbit, sizeof(*tbit));
	if (err < 0)
		return err;

	return 0;
}

int ds_write_bit(struct ds_device *dev, u8 bit)
{
	int err;
	struct ds_status st;

	err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | (bit) ? COMM_D : 0, 0);
	if (err)
		return err;

	ds_wait_status(dev, &st);

	return 0;
}

int ds_write_byte(struct ds_device *dev, u8 byte)
{
	int err;
	struct ds_status st;
	u8 rbyte;

	err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | COMM_SPU, byte);
	if (err)
		return err;

	err = ds_wait_status(dev, &st);
	if (err)
		return err;

	err = ds_recv_data(dev, &rbyte, sizeof(rbyte));
	if (err < 0)
		return err;

	ds_start_pulse(dev, PULLUP_PULSE_DURATION);

	return !(byte == rbyte);
}

int ds_read_bit(struct ds_device *dev, u8 *bit)
{
	int err;

	err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
	if (err)
		return err;

	err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | COMM_SPU | COMM_D, 0);
	if (err)
		return err;

	err = ds_recv_data(dev, bit, sizeof(*bit));
	if (err < 0)
		return err;

	return 0;
}

int ds_read_byte(struct ds_device *dev, u8 *byte)
{
	int err;
	struct ds_status st;

	err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM , 0xff);
	if (err)
		return err;

	ds_wait_status(dev, &st);

	err = ds_recv_data(dev, byte, sizeof(*byte));
	if (err < 0)
		return err;

	return 0;
}

int ds_read_block(struct ds_device *dev, u8 *buf, int len)
{
	struct ds_status st;
	int err;

	if (len > 64*1024)
		return -E2BIG;

	memset(buf, 0xFF, len);

	err = ds_send_data(dev, buf, len);
	if (err < 0)
		return err;

	err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
	if (err)
		return err;

	ds_wait_status(dev, &st);

	memset(buf, 0x00, len);
	err = ds_recv_data(dev, buf, len);

	return err;
}

int ds_write_block(struct ds_device *dev, u8 *buf, int len)
{
	int err;
	struct ds_status st;

	err = ds_send_data(dev, buf, len);
	if (err < 0)
		return err;

	ds_wait_status(dev, &st);

	err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
	if (err)
		return err;

	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);
}

#if 0

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;
}

#endif  /*  0  */

static 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;
}

static 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;
}

static 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;
}

static void ds_fini(void)
{
	usb_deregister(&ds_driver);
}

module_init(ds_init);
module_exit(ds_fini);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <[email protected]>");

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
Commit	Line	Data
1da177e4	1	/*
8949d2aa	2	* dscore.c
1da177e4 LT	3	*
1da177e4 LT	4	* Copyright (c) 2004 Evgeniy Polyakov <[email protected]>
8949d2aa	5	*
1da177e4 LT	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <linux/module.h>
	23	#include <linux/kernel.h>
	24	#include <linux/mod_devicetable.h>
	25	#include <linux/usb.h>
	26
	27	#include "dscore.h"
	28
	29	static struct usb_device_id ds_id_table [] = {
	30	{ USB_DEVICE(0x04fa, 0x2490) },
	31	{ },
	32	};
	33	MODULE_DEVICE_TABLE(usb, ds_id_table);
	34
8949d2aa EP	35	static int ds_probe(struct usb_interface , const struct usb_device_id );
8949d2aa EP	36	static void ds_disconnect(struct usb_interface *);
1da177e4 LT	37
	38	int ds_touch_bit(struct ds_device , u8, u8 );
	39	int ds_read_byte(struct ds_device , u8 );
	40	int ds_read_bit(struct ds_device , u8 );
	41	int ds_write_byte(struct ds_device *, u8);
	42	int ds_write_bit(struct ds_device *, u8);
8949d2aa	43	static int ds_start_pulse(struct ds_device *, int);
1da177e4	44	int ds_reset(struct ds_device , struct ds_status );
1da177e4 LT	45	struct ds_device * ds_get_device(void);
	46	void ds_put_device(struct ds_device *);
	47
	48	static inline void ds_dump_status(unsigned char , unsigned char , int);
	49	static int ds_send_control(struct ds_device *, u16, u16);
	50	static int ds_send_control_mode(struct ds_device *, u16, u16);
	51	static int ds_send_control_cmd(struct ds_device *, u16, u16);
	52
	53
	54	static struct usb_driver ds_driver = {
1da177e4 LT	55	.name = "DS9490R",
	56	.probe = ds_probe,
	57	.disconnect = ds_disconnect,
	58	.id_table = ds_id_table,
	59	};
	60
	61	static struct ds_device *ds_dev;
	62
	63	struct ds_device * ds_get_device(void)
	64	{
	65	if (ds_dev)
	66	atomic_inc(&ds_dev->refcnt);
	67	return ds_dev;
	68	}
	69
	70	void ds_put_device(struct ds_device *dev)
	71	{
	72	atomic_dec(&dev->refcnt);
	73	}
	74
	75	static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index)
	76	{
	77	int err;
8949d2aa EP	78
8949d2aa EP	79	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
1da177e4 LT	80	CONTROL_CMD, 0x40, value, index, NULL, 0, 1000);
1da177e4 LT	81	if (err < 0) {
8949d2aa	82	printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n",
1da177e4 LT	83	value, index, err);
	84	return err;
	85	}
	86
	87	return err;
	88	}
	89
	90	static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index)
	91	{
	92	int err;
8949d2aa EP	93
8949d2aa EP	94	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
1da177e4 LT	95	MODE_CMD, 0x40, value, index, NULL, 0, 1000);
1da177e4 LT	96	if (err < 0) {
8949d2aa	97	printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n",
1da177e4 LT	98	value, index, err);
	99	return err;
	100	}
	101
	102	return err;
	103	}
	104
	105	static int ds_send_control(struct ds_device *dev, u16 value, u16 index)
	106	{
	107	int err;
8949d2aa EP	108
8949d2aa EP	109	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
1da177e4 LT	110	COMM_CMD, 0x40, value, index, NULL, 0, 1000);
1da177e4 LT	111	if (err < 0) {
8949d2aa	112	printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n",
1da177e4 LT	113	value, index, err);
	114	return err;
	115	}
	116
	117	return err;
	118	}
	119
	120	static inline void ds_dump_status(unsigned char buf, unsigned char str, int off)
	121	{
	122	printk("%45s: %8x\n", str, buf[off]);
	123	}
	124
8949d2aa EP	125	static int ds_recv_status_nodump(struct ds_device dev, struct ds_status st,
8949d2aa EP	126	unsigned char *buf, int size)
1da177e4 LT	127	{
1da177e4 LT	128	int count, err;
8949d2aa	129
1da177e4	130	memset(st, 0, sizeof(st));
8949d2aa	131
1da177e4 LT	132	count = 0;
	133	err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100);
	134	if (err < 0) {
	135	printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err);
	136	return err;
	137	}
8949d2aa	138
1da177e4 LT	139	if (count >= sizeof(*st))
	140	memcpy(st, buf, sizeof(*st));
	141
	142	return count;
	143	}
	144
	145	static int ds_recv_status(struct ds_device dev, struct ds_status st)
	146	{
	147	unsigned char buf[64];
	148	int count, err = 0, i;
8949d2aa	149
1da177e4	150	memcpy(st, buf, sizeof(*st));
8949d2aa	151
1da177e4 LT	152	count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
	153	if (count < 0)
	154	return err;
8949d2aa	155
1da177e4 LT	156	printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);
	157	for (i=0; i<count; ++i)
	158	printk("%02x ", buf[i]);
	159	printk("\n");
	160
	161	if (count >= 16) {
	162	ds_dump_status(buf, "enable flag", 0);
	163	ds_dump_status(buf, "1-wire speed", 1);
	164	ds_dump_status(buf, "strong pullup duration", 2);
	165	ds_dump_status(buf, "programming pulse duration", 3);
	166	ds_dump_status(buf, "pulldown slew rate control", 4);
	167	ds_dump_status(buf, "write-1 low time", 5);
	168	ds_dump_status(buf, "data sample offset/write-0 recovery time", 6);
	169	ds_dump_status(buf, "reserved (test register)", 7);
	170	ds_dump_status(buf, "device status flags", 8);
	171	ds_dump_status(buf, "communication command byte 1", 9);
	172	ds_dump_status(buf, "communication command byte 2", 10);
	173	ds_dump_status(buf, "communication command buffer status", 11);
	174	ds_dump_status(buf, "1-wire data output buffer status", 12);
	175	ds_dump_status(buf, "1-wire data input buffer status", 13);
	176	ds_dump_status(buf, "reserved", 14);
	177	ds_dump_status(buf, "reserved", 15);
	178	}
	179
	180	memcpy(st, buf, sizeof(*st));
	181
	182	if (st->status & ST_EPOF) {
	183	printk(KERN_INFO "Resetting device after ST_EPOF.\n");
	184	err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
	185	if (err)
	186	return err;
	187	count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
	188	if (count < 0)
	189	return err;
	190	}
	191	#if 0
	192	if (st->status & ST_IDLE) {
	193	printk(KERN_INFO "Resetting pulse after ST_IDLE.\n");
	194	err = ds_start_pulse(dev, PULLUP_PULSE_DURATION);
	195	if (err)
	196	return err;
	197	}
	198	#endif
8949d2aa	199
1da177e4 LT	200	return err;
	201	}
	202
	203	static int ds_recv_data(struct ds_device dev, unsigned char buf, int size)
	204	{
	205	int count, err;
	206	struct ds_status st;
8949d2aa	207
1da177e4	208	count = 0;
8949d2aa	209	err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]),
1da177e4 LT	210	buf, size, &count, 1000);
	211	if (err < 0) {
	212	printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);
	213	usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));
	214	ds_recv_status(dev, &st);
	215	return err;
	216	}
	217
	218	#if 0
	219	{
	220	int i;
	221
	222	printk("%s: count=%d: ", __func__, count);
	223	for (i=0; i<count; ++i)
	224	printk("%02x ", buf[i]);
	225	printk("\n");
	226	}
	227	#endif
	228	return count;
	229	}
	230
	231	static int ds_send_data(struct ds_device dev, unsigned char buf, int len)
	232	{
	233	int count, err;
8949d2aa	234
1da177e4 LT	235	count = 0;
	236	err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000);
	237	if (err < 0) {
	238	printk(KERN_ERR "Failed to read 1-wire data from 0x02: err=%d.\n", err);
	239	return err;
	240	}
	241
	242	return err;
	243	}
	244
8949d2aa EP	245	#if 0
8949d2aa EP	246
1da177e4 LT	247	int ds_stop_pulse(struct ds_device *dev, int limit)
	248	{
	249	struct ds_status st;
	250	int count = 0, err = 0;
	251	u8 buf[0x20];
8949d2aa	252
1da177e4 LT	253	do {
	254	err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0);
	255	if (err)
	256	break;
	257	err = ds_send_control(dev, CTL_RESUME_EXE, 0);
	258	if (err)
	259	break;
	260	err = ds_recv_status_nodump(dev, &st, buf, sizeof(buf));
	261	if (err)
	262	break;
	263
	264	if ((st.status & ST_SPUA) == 0) {
	265	err = ds_send_control_mode(dev, MOD_PULSE_EN, 0);
	266	if (err)
	267	break;
	268	}
	269	} while(++count < limit);
	270
	271	return err;
	272	}
	273
	274	int ds_detect(struct ds_device dev, struct ds_status st)
	275	{
	276	int err;
8949d2aa	277
1da177e4 LT	278	err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
	279	if (err)
	280	return err;
	281
	282	err = ds_send_control(dev, COMM_SET_DURATION \| COMM_IM, 0);
	283	if (err)
	284	return err;
8949d2aa	285
1da177e4 LT	286	err = ds_send_control(dev, COMM_SET_DURATION \| COMM_IM \| COMM_TYPE, 0x40);
	287	if (err)
	288	return err;
8949d2aa	289
1da177e4 LT	290	err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_PROG);
	291	if (err)
	292	return err;
	293
	294	err = ds_recv_status(dev, st);
	295
	296	return err;
	297	}
	298
8949d2aa EP	299	#endif /* 0 */
	300
	301	static int ds_wait_status(struct ds_device dev, struct ds_status st)
1da177e4 LT	302	{
	303	u8 buf[0x20];
	304	int err, count = 0;
	305
	306	do {
	307	err = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
	308	#if 0
8949d2aa	309	if (err >= 0) {
1da177e4 LT	310	int i;
	311	printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err);
	312	for (i=0; i<err; ++i)
	313	printk("%02x ", buf[i]);
	314	printk("\n");
	315	}
	316	#endif
	317	} while(!(buf[0x08] & 0x20) && !(err < 0) && ++count < 100);
	318
	319
	320	if (((err > 16) && (buf[0x10] & 0x01)) \|\| count >= 100 \|\| err < 0) {
	321	ds_recv_status(dev, st);
	322	return -1;
8949d2aa	323	} else
1da177e4	324	return 0;
1da177e4 LT	325	}
	326
	327	int ds_reset(struct ds_device dev, struct ds_status st)
	328	{
	329	int err;
	330
	331	//err = ds_send_control(dev, COMM_1_WIRE_RESET \| COMM_F \| COMM_IM \| COMM_SE, SPEED_FLEXIBLE);
	332	err = ds_send_control(dev, 0x43, SPEED_NORMAL);
	333	if (err)
	334	return err;
	335
	336	ds_wait_status(dev, st);
	337	#if 0
	338	if (st->command_buffer_status) {
	339	printk(KERN_INFO "Short circuit.\n");
	340	return -EIO;
	341	}
	342	#endif
	343
	344	return 0;
	345	}
	346
8949d2aa	347	#if 0
1da177e4 LT	348	int ds_set_speed(struct ds_device *dev, int speed)
	349	{
	350	int err;
	351
	352	if (speed != SPEED_NORMAL && speed != SPEED_FLEXIBLE && speed != SPEED_OVERDRIVE)
	353	return -EINVAL;
	354
	355	if (speed != SPEED_OVERDRIVE)
	356	speed = SPEED_FLEXIBLE;
	357
	358	speed &= 0xff;
8949d2aa	359
1da177e4 LT	360	err = ds_send_control_mode(dev, MOD_1WIRE_SPEED, speed);
	361	if (err)
	362	return err;
	363
	364	return err;
	365	}
8949d2aa	366	#endif /* 0 */
1da177e4	367
8949d2aa	368	static int ds_start_pulse(struct ds_device *dev, int delay)
1da177e4 LT	369	{
	370	int err;
	371	u8 del = 1 + (u8)(delay >> 4);
	372	struct ds_status st;
8949d2aa	373
1da177e4 LT	374	#if 0
	375	err = ds_stop_pulse(dev, 10);
	376	if (err)
	377	return err;
	378
	379	err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
	380	if (err)
	381	return err;
	382	#endif
	383	err = ds_send_control(dev, COMM_SET_DURATION \| COMM_IM, del);
	384	if (err)
	385	return err;
	386
	387	err = ds_send_control(dev, COMM_PULSE \| COMM_IM \| COMM_F, 0);
	388	if (err)
	389	return err;
	390
	391	mdelay(delay);
	392
	393	ds_wait_status(dev, &st);
8949d2aa	394
1da177e4 LT	395	return err;
	396	}
	397
	398	int ds_touch_bit(struct ds_device dev, u8 bit, u8 tbit)
	399	{
	400	int err, count;
	401	struct ds_status st;
	402	u16 value = (COMM_BIT_IO \| COMM_IM) \| ((bit) ? COMM_D : 0);
	403	u16 cmd;
8949d2aa	404
1da177e4 LT	405	err = ds_send_control(dev, value, 0);
	406	if (err)
	407	return err;
	408
	409	count = 0;
	410	do {
	411	err = ds_wait_status(dev, &st);
	412	if (err)
	413	return err;
	414
	415	cmd = st.command0 \| (st.command1 << 8);
	416	} while (cmd != value && ++count < 10);
	417
	418	if (err < 0 \|\| count >= 10) {
	419	printk(KERN_ERR "Failed to obtain status.\n");
	420	return -EINVAL;
	421	}
	422
	423	err = ds_recv_data(dev, tbit, sizeof(*tbit));
	424	if (err < 0)
	425	return err;
	426
	427	return 0;
	428	}
	429
	430	int ds_write_bit(struct ds_device *dev, u8 bit)
	431	{
	432	int err;
	433	struct ds_status st;
8949d2aa	434
1da177e4 LT	435	err = ds_send_control(dev, COMM_BIT_IO \| COMM_IM \| (bit) ? COMM_D : 0, 0);
	436	if (err)
	437	return err;
	438
	439	ds_wait_status(dev, &st);
	440
	441	return 0;
	442	}
	443
	444	int ds_write_byte(struct ds_device *dev, u8 byte)
	445	{
	446	int err;
	447	struct ds_status st;
	448	u8 rbyte;
8949d2aa	449
1da177e4 LT	450	err = ds_send_control(dev, COMM_BYTE_IO \| COMM_IM \| COMM_SPU, byte);
	451	if (err)
	452	return err;
	453
	454	err = ds_wait_status(dev, &st);
	455	if (err)
	456	return err;
8949d2aa	457
1da177e4 LT	458	err = ds_recv_data(dev, &rbyte, sizeof(rbyte));
	459	if (err < 0)
	460	return err;
8949d2aa	461
1da177e4 LT	462	ds_start_pulse(dev, PULLUP_PULSE_DURATION);
	463
	464	return !(byte == rbyte);
	465	}
	466
	467	int ds_read_bit(struct ds_device dev, u8 bit)
	468	{
	469	int err;
	470
	471	err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
	472	if (err)
	473	return err;
8949d2aa	474
1da177e4 LT	475	err = ds_send_control(dev, COMM_BIT_IO \| COMM_IM \| COMM_SPU \| COMM_D, 0);
	476	if (err)
	477	return err;
8949d2aa	478
1da177e4 LT	479	err = ds_recv_data(dev, bit, sizeof(*bit));
	480	if (err < 0)
	481	return err;
	482
	483	return 0;
	484	}
	485
	486	int ds_read_byte(struct ds_device dev, u8 byte)
	487	{
	488	int err;
	489	struct ds_status st;
	490
	491	err = ds_send_control(dev, COMM_BYTE_IO \| COMM_IM , 0xff);
	492	if (err)
	493	return err;
	494
	495	ds_wait_status(dev, &st);
8949d2aa	496
1da177e4 LT	497	err = ds_recv_data(dev, byte, sizeof(*byte));
	498	if (err < 0)
	499	return err;
	500
	501	return 0;
	502	}
	503
	504	int ds_read_block(struct ds_device dev, u8 buf, int len)
	505	{
	506	struct ds_status st;
	507	int err;
	508
	509	if (len > 64*1024)
	510	return -E2BIG;
	511
	512	memset(buf, 0xFF, len);
8949d2aa	513
1da177e4 LT	514	err = ds_send_data(dev, buf, len);
	515	if (err < 0)
	516	return err;
8949d2aa	517
1da177e4 LT	518	err = ds_send_control(dev, COMM_BLOCK_IO \| COMM_IM \| COMM_SPU, len);
	519	if (err)
	520	return err;
	521
	522	ds_wait_status(dev, &st);
8949d2aa	523
1da177e4 LT	524	memset(buf, 0x00, len);
	525	err = ds_recv_data(dev, buf, len);
	526
	527	return err;
	528	}
	529
	530	int ds_write_block(struct ds_device dev, u8 buf, int len)
	531	{
	532	int err;
	533	struct ds_status st;
8949d2aa	534
1da177e4 LT	535	err = ds_send_data(dev, buf, len);
	536	if (err < 0)
	537	return err;
8949d2aa	538
1da177e4 LT	539	ds_wait_status(dev, &st);
	540
	541	err = ds_send_control(dev, COMM_BLOCK_IO \| COMM_IM \| COMM_SPU, len);
	542	if (err)
	543	return err;
	544
	545	ds_wait_status(dev, &st);
	546
	547	err = ds_recv_data(dev, buf, len);
	548	if (err < 0)
	549	return err;
	550
	551	ds_start_pulse(dev, PULLUP_PULSE_DURATION);
8949d2aa	552
1da177e4 LT	553	return !(err == len);
	554	}
	555
8949d2aa EP	556	#if 0
8949d2aa EP	557
1da177e4 LT	558	int ds_search(struct ds_device dev, u64 init, u64 buf, u8 id_number, int conditional_search)
	559	{
	560	int err;
	561	u16 value, index;
	562	struct ds_status st;
	563
	564	memset(buf, 0, sizeof(buf));
8949d2aa	565
1da177e4 LT	566	err = ds_send_data(ds_dev, (unsigned char *)&init, 8);
	567	if (err)
	568	return err;
8949d2aa	569
1da177e4 LT	570	ds_wait_status(ds_dev, &st);
	571
	572	value = COMM_SEARCH_ACCESS \| COMM_IM \| COMM_SM \| COMM_F \| COMM_RTS;
	573	index = (conditional_search ? 0xEC : 0xF0) \| (id_number << 8);
	574	err = ds_send_control(ds_dev, value, index);
	575	if (err)
	576	return err;
	577
	578	ds_wait_status(ds_dev, &st);
	579
	580	err = ds_recv_data(ds_dev, (unsigned char )buf, 8id_number);
	581	if (err < 0)
	582	return err;
	583
	584	return err/8;
	585	}
	586
	587	int ds_match_access(struct ds_device *dev, u64 init)
	588	{
	589	int err;
	590	struct ds_status st;
	591
	592	err = ds_send_data(dev, (unsigned char *)&init, sizeof(init));
	593	if (err)
	594	return err;
8949d2aa	595
1da177e4 LT	596	ds_wait_status(dev, &st);
	597
	598	err = ds_send_control(dev, COMM_MATCH_ACCESS \| COMM_IM \| COMM_RST, 0x0055);
	599	if (err)
	600	return err;
	601
	602	ds_wait_status(dev, &st);
	603
	604	return 0;
	605	}
	606
	607	int ds_set_path(struct ds_device *dev, u64 init)
	608	{
	609	int err;
	610	struct ds_status st;
	611	u8 buf[9];
	612
	613	memcpy(buf, &init, 8);
	614	buf[8] = BRANCH_MAIN;
8949d2aa	615
1da177e4 LT	616	err = ds_send_data(dev, buf, sizeof(buf));
	617	if (err)
	618	return err;
8949d2aa	619
1da177e4 LT	620	ds_wait_status(dev, &st);
	621
	622	err = ds_send_control(dev, COMM_SET_PATH \| COMM_IM \| COMM_RST, 0);
	623	if (err)
	624	return err;
	625
	626	ds_wait_status(dev, &st);
	627
	628	return 0;
	629	}
	630
8949d2aa EP	631	#endif /* 0 */
	632
	633	static int ds_probe(struct usb_interface *intf,
	634	const struct usb_device_id *udev_id)
1da177e4 LT	635	{
	636	struct usb_device *udev = interface_to_usbdev(intf);
	637	struct usb_endpoint_descriptor *endpoint;
	638	struct usb_host_interface *iface_desc;
	639	int i, err;
	640
	641	ds_dev = kmalloc(sizeof(struct ds_device), GFP_KERNEL);
	642	if (!ds_dev) {
	643	printk(KERN_INFO "Failed to allocate new DS9490R structure.\n");
	644	return -ENOMEM;
	645	}
	646
	647	ds_dev->udev = usb_get_dev(udev);
	648	usb_set_intfdata(intf, ds_dev);
	649
	650	err = usb_set_interface(ds_dev->udev, intf->altsetting[0].desc.bInterfaceNumber, 3);
	651	if (err) {
	652	printk(KERN_ERR "Failed to set alternative setting 3 for %d interface: err=%d.\n",
	653	intf->altsetting[0].desc.bInterfaceNumber, err);
	654	return err;
	655	}
	656
	657	err = usb_reset_configuration(ds_dev->udev);
	658	if (err) {
	659	printk(KERN_ERR "Failed to reset configuration: err=%d.\n", err);
	660	return err;
	661	}
8949d2aa	662
1da177e4 LT	663	iface_desc = &intf->altsetting[0];
	664	if (iface_desc->desc.bNumEndpoints != NUM_EP-1) {
	665	printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints);
	666	return -ENODEV;
	667	}
	668
	669	atomic_set(&ds_dev->refcnt, 0);
	670	memset(ds_dev->ep, 0, sizeof(ds_dev->ep));
8949d2aa	671
1da177e4	672	/*
8949d2aa	673	* This loop doesn'd show control 0 endpoint,
1da177e4 LT	674	* so we will fill only 1-3 endpoints entry.
	675	*/
	676	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
	677	endpoint = &iface_desc->endpoint[i].desc;
	678
	679	ds_dev->ep[i+1] = endpoint->bEndpointAddress;
8949d2aa	680
1da177e4 LT	681	printk("%d: addr=%x, size=%d, dir=%s, type=%x\n",
	682	i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize),
	683	(endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT",
	684	endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
	685	}
8949d2aa	686
1da177e4 LT	687	#if 0
	688	{
	689	int err, i;
	690	u64 buf[3];
	691	u64 init=0xb30000002078ee81ull;
	692	struct ds_status st;
8949d2aa	693
1da177e4 LT	694	ds_reset(ds_dev, &st);
	695	err = ds_search(ds_dev, init, buf, 3, 0);
	696	if (err < 0)
	697	return err;
	698	for (i=0; i<err; ++i)
	699	printk("%d: %llx\n", i, buf[i]);
8949d2aa EP	700
8949d2aa EP	701	printk("Resetting...\n");
1da177e4 LT	702	ds_reset(ds_dev, &st);
	703	printk("Setting path for %llx.\n", init);
	704	err = ds_set_path(ds_dev, init);
	705	if (err)
	706	return err;
	707	printk("Calling MATCH_ACCESS.\n");
	708	err = ds_match_access(ds_dev, init);
	709	if (err)
	710	return err;
	711
	712	printk("Searching the bus...\n");
	713	err = ds_search(ds_dev, init, buf, 3, 0);
	714
	715	printk("ds_search() returned %d\n", err);
8949d2aa	716
1da177e4 LT	717	if (err < 0)
	718	return err;
	719	for (i=0; i<err; ++i)
	720	printk("%d: %llx\n", i, buf[i]);
8949d2aa	721
1da177e4 LT	722	return 0;
	723	}
	724	#endif
	725
	726	return 0;
	727	}
	728
8949d2aa	729	static void ds_disconnect(struct usb_interface *intf)
1da177e4 LT	730	{
1da177e4 LT	731	struct ds_device *dev;
8949d2aa	732
1da177e4 LT	733	dev = usb_get_intfdata(intf);
	734	usb_set_intfdata(intf, NULL);
	735
	736	while (atomic_read(&dev->refcnt)) {
	737	printk(KERN_INFO "Waiting for DS to become free: refcnt=%d.\n",
	738	atomic_read(&dev->refcnt));
	739
	740	if (msleep_interruptible(1000))
	741	flush_signals(current);
	742	}
	743
	744	usb_put_dev(dev->udev);
	745	kfree(dev);
	746	ds_dev = NULL;
	747	}
	748
8949d2aa	749	static int ds_init(void)
1da177e4 LT	750	{
	751	int err;
	752
	753	err = usb_register(&ds_driver);
	754	if (err) {
	755	printk(KERN_INFO "Failed to register DS9490R USB device: err=%d.\n", err);
	756	return err;
	757	}
	758
	759	return 0;
	760	}
	761
8949d2aa	762	static void ds_fini(void)
1da177e4 LT	763	{
	764	usb_deregister(&ds_driver);
	765	}
	766
	767	module_init(ds_init);
	768	module_exit(ds_fini);
	769
	770	MODULE_LICENSE("GPL");
	771	MODULE_AUTHOR("Evgeniy Polyakov <[email protected]>");
	772
	773	EXPORT_SYMBOL(ds_touch_bit);
	774	EXPORT_SYMBOL(ds_read_byte);
	775	EXPORT_SYMBOL(ds_read_bit);
	776	EXPORT_SYMBOL(ds_read_block);
	777	EXPORT_SYMBOL(ds_write_byte);
	778	EXPORT_SYMBOL(ds_write_bit);
	779	EXPORT_SYMBOL(ds_write_block);
	780	EXPORT_SYMBOL(ds_reset);
	781	EXPORT_SYMBOL(ds_get_device);
	782	EXPORT_SYMBOL(ds_put_device);
	783
	784	/*
8949d2aa EP	785	* This functions can be used for EEPROM programming,
8949d2aa EP	786	* when driver will be included into mainline this will
1da177e4 LT	787	* require uncommenting.
	788	*/
	789	#if 0
	790	EXPORT_SYMBOL(ds_start_pulse);
	791	EXPORT_SYMBOL(ds_set_speed);
	792	EXPORT_SYMBOL(ds_detect);
	793	EXPORT_SYMBOL(ds_stop_pulse);
	794	EXPORT_SYMBOL(ds_search);
	795	#endif