[PATCH] w1: Added driver for Dallas' DS9490* USB <-> W1 master.

Added driver for Dallas' DS9490* USB <-> W1 master.
Should handle any device based on DS2490 chip.
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/w1/Kconfig

@@ -21,6 +21,25 @@ config W1_MATROX
 	  This support is also available as a module.  If so, the module 
 	  will be called matrox_w1.ko.
 
+config W1_DS9490
+	tristate "DS9490R transport layer driver"
+	depends on W1 && USB
+	help
+	  Say Y here if you want to have a driver for DS9490R UWB <-> W1 bridge.
+
+	  This support is also available as a module.  If so, the module 
+	  will be called ds9490r.ko.
+
+config W1_DS9490R_BRIDGE
+	tristate "DS9490R USB <-> W1 transport layer for 1-wire"
+	depends on W1_DS9490
+	help
+	  Say Y here if you want to communicate with your 1-wire devices
+	  using DS9490R USB bridge.
+
+	  This support is also available as a module.  If so, the module 
+	  will be called ds_w1_bridge.ko.
+
 config W1_THERM
 	tristate "Thermal family implementation"
 	depends on W1

drivers/w1/Makefile

@@ -8,3 +8,9 @@ wire-objs		:= w1.o w1_int.o w1_family.o w1_netlink.o w1_io.o
 obj-$(CONFIG_W1_MATROX)		+= matrox_w1.o
 obj-$(CONFIG_W1_THERM)		+= w1_therm.o
 obj-$(CONFIG_W1_SMEM)		+= w1_smem.o
+
+obj-$(CONFIG_W1_DS9490)		+= ds9490r.o 
+ds9490r-objs    := dscore.o
+
+obj-$(CONFIG_W1_DS9490_BRIDGE)	+= ds_w1_bridge.o
+

drivers/w1/ds_w1_bridge.c

+/*
+ * 	ds_w1_bridge.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/types.h>
+
+#include "../w1/w1.h"
+#include "../w1/w1_int.h"
+#include "dscore.h"
+	
+static struct ds_device *ds_dev;
+static struct w1_bus_master *ds_bus_master;
+
+static u8 ds9490r_touch_bit(unsigned long data, u8 bit)
+{
+	u8 ret;
+	struct ds_device *dev = (struct ds_device *)data;
+
+	if (ds_touch_bit(dev, bit, &ret))
+		return 0;
+
+	return ret;
+}
+
+static void ds9490r_write_bit(unsigned long data, u8 bit)
+{
+	struct ds_device *dev = (struct ds_device *)data;
+
+	ds_write_bit(dev, bit);
+}
+
+static void ds9490r_write_byte(unsigned long data, u8 byte)
+{
+	struct ds_device *dev = (struct ds_device *)data;
+
+	ds_write_byte(dev, byte);
+}
+
+static u8 ds9490r_read_bit(unsigned long data)
+{
+	struct ds_device *dev = (struct ds_device *)data;
+	int err;
+	u8 bit = 0;
+
+	err = ds_touch_bit(dev, 1, &bit);
+	if (err)
+		return 0;
+	//err = ds_read_bit(dev, &bit);
+	//if (err)
+	//	return 0;
+
+	return bit & 1;
+}
+
+static u8 ds9490r_read_byte(unsigned long data)
+{
+	struct ds_device *dev = (struct ds_device *)data;
+	int err;
+	u8 byte = 0;
+
+	err = ds_read_byte(dev, &byte);
+	if (err)
+		return 0;
+
+	return byte;
+}
+
+static void ds9490r_write_block(unsigned long data, u8 *buf, int len)
+{
+	struct ds_device *dev = (struct ds_device *)data;
+
+	ds_write_block(dev, buf, len);
+}
+
+static u8 ds9490r_read_block(unsigned long data, u8 *buf, int len)
+{
+	struct ds_device *dev = (struct ds_device *)data;
+	int err;
+
+	err = ds_read_block(dev, buf, len);
+	if (err < 0)
+		return 0;
+
+	return len;
+}
+
+static u8 ds9490r_reset(unsigned long data)
+{
+	struct ds_device *dev = (struct ds_device *)data;
+	struct ds_status st;
+	int err;
+
+	memset(&st, 0, sizeof(st));
+
+	err = ds_reset(dev, &st);
+	if (err)
+		return 1;
+
+	return 0;
+}
+
+static int __devinit ds_w1_init(void)
+{
+	int err;
+	
+	ds_bus_master = kmalloc(sizeof(*ds_bus_master), GFP_KERNEL);
+	if (!ds_bus_master)
+	{
+		printk(KERN_ERR "Failed to allocate DS9490R USB<->W1 bus_master structure.\n");
+		return -ENOMEM;
+	}
+
+	ds_dev = ds_get_device();
+	if (!ds_dev)
+	{
+		printk(KERN_ERR "DS9490R is not registered.\n");
+		err =  -ENODEV;
+		goto err_out_free_bus_master;
+	}
+
+	memset(ds_bus_master, 0, sizeof(*ds_bus_master));
+
+	ds_bus_master->data 		= (unsigned long)ds_dev;
+	ds_bus_master->touch_bit 	= &ds9490r_touch_bit;
+	ds_bus_master->read_bit 	= &ds9490r_read_bit;
+	ds_bus_master->write_bit 	= &ds9490r_write_bit;
+	ds_bus_master->read_byte 	= &ds9490r_read_byte;
+	ds_bus_master->write_byte 	= &ds9490r_write_byte;
+	ds_bus_master->read_block 	= &ds9490r_read_block;
+	ds_bus_master->write_block 	= &ds9490r_write_block;
+	ds_bus_master->reset_bus	= &ds9490r_reset;
+
+	err = w1_add_master_device(ds_bus_master);
+	if (err)
+		goto err_out_put_device;
+
+	return 0;
+
+err_out_put_device:
+	ds_put_device(ds_dev);
+err_out_free_bus_master:
+	kfree(ds_bus_master);
+
+	return err;
+}
+
+static void __devexit ds_w1_fini(void)
+{
+	w1_remove_master_device(ds_bus_master);
+	ds_put_device(ds_dev);
+	kfree(ds_bus_master);
+}
+
+module_init(ds_w1_init);
+module_exit(ds_w1_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");

drivers/w1/dscore.h

+/*
+ * 	dscore.h
+ *
+ * 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
+ */
+
+#ifndef __DSCORE_H
+#define __DSCORE_H
+
+#include <linux/usb.h>
+#include <asm/atomic.h>
+
+/* COMMAND TYPE CODES */
+#define CONTROL_CMD			0x00
+#define COMM_CMD			0x01
+#define MODE_CMD			0x02
+
+/* CONTROL COMMAND CODES */
+#define CTL_RESET_DEVICE		0x0000
+#define CTL_START_EXE			0x0001
+#define CTL_RESUME_EXE			0x0002
+#define CTL_HALT_EXE_IDLE		0x0003
+#define CTL_HALT_EXE_DONE		0x0004
+#define CTL_FLUSH_COMM_CMDS		0x0007
+#define CTL_FLUSH_RCV_BUFFER		0x0008
+#define CTL_FLUSH_XMT_BUFFER		0x0009
+#define CTL_GET_COMM_CMDS		0x000A
+
+/* MODE COMMAND CODES */
+#define MOD_PULSE_EN			0x0000
+#define MOD_SPEED_CHANGE_EN		0x0001
+#define MOD_1WIRE_SPEED			0x0002
+#define MOD_STRONG_PU_DURATION		0x0003
+#define MOD_PULLDOWN_SLEWRATE		0x0004
+#define MOD_PROG_PULSE_DURATION		0x0005
+#define MOD_WRITE1_LOWTIME		0x0006
+#define MOD_DSOW0_TREC			0x0007
+
+/* COMMUNICATION COMMAND CODES */
+#define COMM_ERROR_ESCAPE		0x0601
+#define COMM_SET_DURATION		0x0012
+#define COMM_BIT_IO			0x0020
+#define COMM_PULSE			0x0030
+#define COMM_1_WIRE_RESET		0x0042
+#define COMM_BYTE_IO			0x0052
+#define COMM_MATCH_ACCESS		0x0064
+#define COMM_BLOCK_IO			0x0074
+#define COMM_READ_STRAIGHT		0x0080
+#define COMM_DO_RELEASE			0x6092
+#define COMM_SET_PATH			0x00A2
+#define COMM_WRITE_SRAM_PAGE		0x00B2
+#define COMM_WRITE_EPROM		0x00C4
+#define COMM_READ_CRC_PROT_PAGE		0x00D4
+#define COMM_READ_REDIRECT_PAGE_CRC	0x21E4
+#define COMM_SEARCH_ACCESS		0x00F4
+
+/* Communication command bits */
+#define COMM_TYPE			0x0008
+#define COMM_SE				0x0008
+#define COMM_D				0x0008
+#define COMM_Z				0x0008
+#define COMM_CH				0x0008
+#define COMM_SM				0x0008
+#define COMM_R				0x0008
+#define COMM_IM				0x0001
+
+#define COMM_PS				0x4000
+#define COMM_PST			0x4000
+#define COMM_CIB			0x4000
+#define COMM_RTS			0x4000
+#define COMM_DT				0x2000
+#define COMM_SPU			0x1000
+#define COMM_F				0x0800
+#define COMM_NTP			0x0400
+#define COMM_ICP			0x0200
+#define COMM_RST			0x0100
+
+#define PULSE_PROG			0x01
+#define PULSE_SPUE			0x02
+
+#define BRANCH_MAIN			0xCC
+#define BRANCH_AUX			0x33
+
+/*
+ * Duration of the strong pull-up pulse in milliseconds.
+ */
+#define PULLUP_PULSE_DURATION		750
+
+/* Status flags */
+#define ST_SPUA				0x01  /* Strong Pull-up is active */
+#define ST_PRGA				0x02  /* 12V programming pulse is being generated */
+#define ST_12VP				0x04  /* external 12V programming voltage is present */
+#define ST_PMOD				0x08  /* DS2490 powered from USB and external sources */
+#define ST_HALT				0x10  /* DS2490 is currently halted */
+#define ST_IDLE				0x20  /* DS2490 is currently idle */
+#define ST_EPOF				0x80
+
+#define SPEED_NORMAL			0x00
+#define SPEED_FLEXIBLE			0x01
+#define SPEED_OVERDRIVE			0x02
+
+#define NUM_EP				4
+#define EP_CONTROL			0
+#define EP_STATUS			1
+#define EP_DATA_OUT			2
+#define EP_DATA_IN			3
+
+struct ds_device
+{
+	struct usb_device 	*udev;
+	struct usb_interface	*intf;
+
+	int			ep[NUM_EP];
+
+	atomic_t		refcnt;
+};
+
+struct ds_status
+{
+	u8			enable;
+	u8			speed;
+	u8			pullup_dur;
+	u8			ppuls_dur;
+	u8			pulldown_slew;
+	u8			write1_time;
+	u8			write0_time;
+	u8			reserved0;
+	u8			status;
+	u8			command0;
+	u8			command1;
+	u8			command_buffer_status;
+	u8			data_out_buffer_status;
+	u8			data_in_buffer_status;
+	u8			reserved1;
+	u8			reserved2;
+
+};
+
+inline int ds_touch_bit(struct ds_device *, u8, u8 *);
+inline int ds_read_byte(struct ds_device *, u8 *);
+inline int ds_read_bit(struct ds_device *, u8 *);
+inline int ds_write_byte(struct ds_device *, u8);
+inline int ds_write_bit(struct ds_device *, u8);
+inline int ds_start_pulse(struct ds_device *, int);
+inline int ds_set_speed(struct ds_device *, int);
+inline int ds_reset(struct ds_device *, struct ds_status *);
+inline int ds_detect(struct ds_device *, struct ds_status *);
+inline int ds_stop_pulse(struct ds_device *, int);
+inline int ds_send_data(struct ds_device *, unsigned char *, int);
+inline int ds_recv_data(struct ds_device *, unsigned char *, int);
+inline int ds_recv_status(struct ds_device *, struct ds_status *);
+inline struct ds_device * ds_get_device(void);
+inline void ds_put_device(struct ds_device *);
+inline int ds_write_block(struct ds_device *, u8 *, int);
+inline int ds_read_block(struct ds_device *, u8 *, int);
+
+#endif /* __DSCORE_H */
+