Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 789 insertions, 0 deletions

diff --git a/drivers/w1/dscore.c b/drivers/w1/dscore.c
new file mode 100644
index 0000000..eee6644
--- /dev/null
+++ b/drivers/w1/dscore.c
@@ -0,0 +1,789 @@
+/*
+ * 	dscore.c
+ *
+ * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
+ * 
+ *
+ * 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);
+
+int ds_probe(struct usb_interface *, const struct usb_device_id *);
+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);
+int ds_start_pulse(struct ds_device *, int);
+int ds_set_speed(struct ds_device *, int);
+int ds_reset(struct ds_device *, struct ds_status *);
+int ds_detect(struct ds_device *, struct ds_status *);
+int ds_stop_pulse(struct ds_device *, int);
+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 = {
+	.owner =	THIS_MODULE,
+	.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]);
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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);
+}
+
+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