4 * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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.
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.
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
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/mod_devicetable.h>
25 #include <linux/usb.h>
27 #include "../w1_int.h"
30 /* COMMAND TYPE CODES */
31 #define CONTROL_CMD 0x00
35 /* CONTROL COMMAND CODES */
36 #define CTL_RESET_DEVICE 0x0000
37 #define CTL_START_EXE 0x0001
38 #define CTL_RESUME_EXE 0x0002
39 #define CTL_HALT_EXE_IDLE 0x0003
40 #define CTL_HALT_EXE_DONE 0x0004
41 #define CTL_FLUSH_COMM_CMDS 0x0007
42 #define CTL_FLUSH_RCV_BUFFER 0x0008
43 #define CTL_FLUSH_XMT_BUFFER 0x0009
44 #define CTL_GET_COMM_CMDS 0x000A
46 /* MODE COMMAND CODES */
47 #define MOD_PULSE_EN 0x0000
48 #define MOD_SPEED_CHANGE_EN 0x0001
49 #define MOD_1WIRE_SPEED 0x0002
50 #define MOD_STRONG_PU_DURATION 0x0003
51 #define MOD_PULLDOWN_SLEWRATE 0x0004
52 #define MOD_PROG_PULSE_DURATION 0x0005
53 #define MOD_WRITE1_LOWTIME 0x0006
54 #define MOD_DSOW0_TREC 0x0007
56 /* COMMUNICATION COMMAND CODES */
57 #define COMM_ERROR_ESCAPE 0x0601
58 #define COMM_SET_DURATION 0x0012
59 #define COMM_BIT_IO 0x0020
60 #define COMM_PULSE 0x0030
61 #define COMM_1_WIRE_RESET 0x0042
62 #define COMM_BYTE_IO 0x0052
63 #define COMM_MATCH_ACCESS 0x0064
64 #define COMM_BLOCK_IO 0x0074
65 #define COMM_READ_STRAIGHT 0x0080
66 #define COMM_DO_RELEASE 0x6092
67 #define COMM_SET_PATH 0x00A2
68 #define COMM_WRITE_SRAM_PAGE 0x00B2
69 #define COMM_WRITE_EPROM 0x00C4
70 #define COMM_READ_CRC_PROT_PAGE 0x00D4
71 #define COMM_READ_REDIRECT_PAGE_CRC 0x21E4
72 #define COMM_SEARCH_ACCESS 0x00F4
74 /* Communication command bits */
75 #define COMM_TYPE 0x0008
76 #define COMM_SE 0x0008
79 #define COMM_CH 0x0008
80 #define COMM_SM 0x0008
82 #define COMM_IM 0x0001
84 #define COMM_PS 0x4000
85 #define COMM_PST 0x4000
86 #define COMM_CIB 0x4000
87 #define COMM_RTS 0x4000
88 #define COMM_DT 0x2000
89 #define COMM_SPU 0x1000
91 #define COMM_NTP 0x0400
92 #define COMM_ICP 0x0200
93 #define COMM_RST 0x0100
95 #define PULSE_PROG 0x01
96 #define PULSE_SPUE 0x02
98 #define BRANCH_MAIN 0xCC
99 #define BRANCH_AUX 0x33
102 * Duration of the strong pull-up pulse in milliseconds.
104 #define PULLUP_PULSE_DURATION 750
107 #define ST_SPUA 0x01 /* Strong Pull-up is active */
108 #define ST_PRGA 0x02 /* 12V programming pulse is being generated */
109 #define ST_12VP 0x04 /* external 12V programming voltage is present */
110 #define ST_PMOD 0x08 /* DS2490 powered from USB and external sources */
111 #define ST_HALT 0x10 /* DS2490 is currently halted */
112 #define ST_IDLE 0x20 /* DS2490 is currently idle */
115 #define SPEED_NORMAL 0x00
116 #define SPEED_FLEXIBLE 0x01
117 #define SPEED_OVERDRIVE 0x02
122 #define EP_DATA_OUT 2
127 struct list_head ds_entry;
129 struct usb_device *udev;
130 struct usb_interface *intf;
134 struct w1_bus_master master;
150 u8 command_buffer_status;
151 u8 data_out_buffer_status;
152 u8 data_in_buffer_status;
158 static struct usb_device_id ds_id_table [] = {
159 { USB_DEVICE(0x04fa, 0x2490) },
162 MODULE_DEVICE_TABLE(usb, ds_id_table);
164 static int ds_probe(struct usb_interface *, const struct usb_device_id *);
165 static void ds_disconnect(struct usb_interface *);
167 static inline void ds_dump_status(unsigned char *, unsigned char *, int);
168 static int ds_send_control(struct ds_device *, u16, u16);
169 static int ds_send_control_cmd(struct ds_device *, u16, u16);
171 static LIST_HEAD(ds_devices);
172 static DEFINE_MUTEX(ds_mutex);
174 static struct usb_driver ds_driver = {
177 .disconnect = ds_disconnect,
178 .id_table = ds_id_table,
181 static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index)
185 err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
186 CONTROL_CMD, 0x40, value, index, NULL, 0, 1000);
188 printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n",
196 static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index)
200 err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
201 MODE_CMD, 0x40, value, index, NULL, 0, 1000);
203 printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n",
211 static int ds_send_control(struct ds_device *dev, u16 value, u16 index)
215 err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
216 COMM_CMD, 0x40, value, index, NULL, 0, 1000);
218 printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n",
226 static inline void ds_dump_status(unsigned char *buf, unsigned char *str, int off)
228 printk("%45s: %8x\n", str, buf[off]);
231 static int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st,
232 unsigned char *buf, int size)
236 memset(st, 0, sizeof(*st));
239 err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100);
241 printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err);
245 if (count >= sizeof(*st))
246 memcpy(st, buf, sizeof(*st));
251 static int ds_recv_status(struct ds_device *dev, struct ds_status *st)
253 unsigned char buf[64];
254 int count, err = 0, i;
256 memcpy(st, buf, sizeof(*st));
258 count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
262 printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);
263 for (i=0; i<count; ++i)
264 printk("%02x ", buf[i]);
268 ds_dump_status(buf, "enable flag", 0);
269 ds_dump_status(buf, "1-wire speed", 1);
270 ds_dump_status(buf, "strong pullup duration", 2);
271 ds_dump_status(buf, "programming pulse duration", 3);
272 ds_dump_status(buf, "pulldown slew rate control", 4);
273 ds_dump_status(buf, "write-1 low time", 5);
274 ds_dump_status(buf, "data sample offset/write-0 recovery time", 6);
275 ds_dump_status(buf, "reserved (test register)", 7);
276 ds_dump_status(buf, "device status flags", 8);
277 ds_dump_status(buf, "communication command byte 1", 9);
278 ds_dump_status(buf, "communication command byte 2", 10);
279 ds_dump_status(buf, "communication command buffer status", 11);
280 ds_dump_status(buf, "1-wire data output buffer status", 12);
281 ds_dump_status(buf, "1-wire data input buffer status", 13);
282 ds_dump_status(buf, "reserved", 14);
283 ds_dump_status(buf, "reserved", 15);
286 memcpy(st, buf, sizeof(*st));
288 if (st->status & ST_EPOF) {
289 printk(KERN_INFO "Resetting device after ST_EPOF.\n");
290 err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
293 count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
298 if (st->status & ST_IDLE) {
299 printk(KERN_INFO "Resetting pulse after ST_IDLE.\n");
300 err = ds_start_pulse(dev, PULLUP_PULSE_DURATION);
309 static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size)
315 err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]),
316 buf, size, &count, 1000);
318 printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);
319 usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));
320 ds_recv_status(dev, &st);
328 printk("%s: count=%d: ", __func__, count);
329 for (i=0; i<count; ++i)
330 printk("%02x ", buf[i]);
337 static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len)
342 err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000);
344 printk(KERN_ERR "Failed to read 1-wire data from 0x02: err=%d.\n", err);
353 int ds_stop_pulse(struct ds_device *dev, int limit)
356 int count = 0, err = 0;
360 err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0);
363 err = ds_send_control(dev, CTL_RESUME_EXE, 0);
366 err = ds_recv_status_nodump(dev, &st, buf, sizeof(buf));
370 if ((st.status & ST_SPUA) == 0) {
371 err = ds_send_control_mode(dev, MOD_PULSE_EN, 0);
375 } while(++count < limit);
380 int ds_detect(struct ds_device *dev, struct ds_status *st)
384 err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
388 err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, 0);
392 err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM | COMM_TYPE, 0x40);
396 err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_PROG);
400 err = ds_recv_status(dev, st);
407 static int ds_wait_status(struct ds_device *dev, struct ds_status *st)
413 err = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
417 printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err);
418 for (i=0; i<err; ++i)
419 printk("%02x ", buf[i]);
423 } while(!(buf[0x08] & 0x20) && !(err < 0) && ++count < 100);
426 if (((err > 16) && (buf[0x10] & 0x01)) || count >= 100 || err < 0) {
427 ds_recv_status(dev, st);
433 static int ds_reset(struct ds_device *dev, struct ds_status *st)
437 //err = ds_send_control(dev, COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE, SPEED_FLEXIBLE);
438 err = ds_send_control(dev, 0x43, SPEED_NORMAL);
442 ds_wait_status(dev, st);
444 if (st->command_buffer_status) {
445 printk(KERN_INFO "Short circuit.\n");
454 static int ds_set_speed(struct ds_device *dev, int speed)
458 if (speed != SPEED_NORMAL && speed != SPEED_FLEXIBLE && speed != SPEED_OVERDRIVE)
461 if (speed != SPEED_OVERDRIVE)
462 speed = SPEED_FLEXIBLE;
466 err = ds_send_control_mode(dev, MOD_1WIRE_SPEED, speed);
474 static int ds_start_pulse(struct ds_device *dev, int delay)
477 u8 del = 1 + (u8)(delay >> 4);
481 err = ds_stop_pulse(dev, 10);
485 err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
489 err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del);
493 err = ds_send_control(dev, COMM_PULSE | COMM_IM | COMM_F, 0);
499 ds_wait_status(dev, &st);
504 static int ds_touch_bit(struct ds_device *dev, u8 bit, u8 *tbit)
508 u16 value = (COMM_BIT_IO | COMM_IM) | ((bit) ? COMM_D : 0);
511 err = ds_send_control(dev, value, 0);
517 err = ds_wait_status(dev, &st);
521 cmd = st.command0 | (st.command1 << 8);
522 } while (cmd != value && ++count < 10);
524 if (err < 0 || count >= 10) {
525 printk(KERN_ERR "Failed to obtain status.\n");
529 err = ds_recv_data(dev, tbit, sizeof(*tbit));
536 static int ds_write_bit(struct ds_device *dev, u8 bit)
541 err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | (bit) ? COMM_D : 0, 0);
545 ds_wait_status(dev, &st);
550 static int ds_write_byte(struct ds_device *dev, u8 byte)
556 err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | COMM_SPU, byte);
560 err = ds_wait_status(dev, &st);
564 err = ds_recv_data(dev, &rbyte, sizeof(rbyte));
568 ds_start_pulse(dev, PULLUP_PULSE_DURATION);
570 return !(byte == rbyte);
573 static int ds_read_byte(struct ds_device *dev, u8 *byte)
578 err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM , 0xff);
582 ds_wait_status(dev, &st);
584 err = ds_recv_data(dev, byte, sizeof(*byte));
591 static int ds_read_block(struct ds_device *dev, u8 *buf, int len)
599 memset(buf, 0xFF, len);
601 err = ds_send_data(dev, buf, len);
605 err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
609 ds_wait_status(dev, &st);
611 memset(buf, 0x00, len);
612 err = ds_recv_data(dev, buf, len);
617 static int ds_write_block(struct ds_device *dev, u8 *buf, int len)
622 err = ds_send_data(dev, buf, len);
626 ds_wait_status(dev, &st);
628 err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
632 ds_wait_status(dev, &st);
634 err = ds_recv_data(dev, buf, len);
638 ds_start_pulse(dev, PULLUP_PULSE_DURATION);
640 return !(err == len);
645 static int ds_search(struct ds_device *dev, u64 init, u64 *buf, u8 id_number, int conditional_search)
651 memset(buf, 0, sizeof(buf));
653 err = ds_send_data(ds_dev, (unsigned char *)&init, 8);
657 ds_wait_status(ds_dev, &st);
659 value = COMM_SEARCH_ACCESS | COMM_IM | COMM_SM | COMM_F | COMM_RTS;
660 index = (conditional_search ? 0xEC : 0xF0) | (id_number << 8);
661 err = ds_send_control(ds_dev, value, index);
665 ds_wait_status(ds_dev, &st);
667 err = ds_recv_data(ds_dev, (unsigned char *)buf, 8*id_number);
674 static int ds_match_access(struct ds_device *dev, u64 init)
679 err = ds_send_data(dev, (unsigned char *)&init, sizeof(init));
683 ds_wait_status(dev, &st);
685 err = ds_send_control(dev, COMM_MATCH_ACCESS | COMM_IM | COMM_RST, 0x0055);
689 ds_wait_status(dev, &st);
694 static int ds_set_path(struct ds_device *dev, u64 init)
700 memcpy(buf, &init, 8);
701 buf[8] = BRANCH_MAIN;
703 err = ds_send_data(dev, buf, sizeof(buf));
707 ds_wait_status(dev, &st);
709 err = ds_send_control(dev, COMM_SET_PATH | COMM_IM | COMM_RST, 0);
713 ds_wait_status(dev, &st);
720 static u8 ds9490r_touch_bit(void *data, u8 bit)
723 struct ds_device *dev = data;
725 if (ds_touch_bit(dev, bit, &ret))
731 static void ds9490r_write_bit(void *data, u8 bit)
733 struct ds_device *dev = data;
735 ds_write_bit(dev, bit);
738 static void ds9490r_write_byte(void *data, u8 byte)
740 struct ds_device *dev = data;
742 ds_write_byte(dev, byte);
745 static u8 ds9490r_read_bit(void *data)
747 struct ds_device *dev = data;
751 err = ds_touch_bit(dev, 1, &bit);
758 static u8 ds9490r_read_byte(void *data)
760 struct ds_device *dev = data;
764 err = ds_read_byte(dev, &byte);
771 static void ds9490r_write_block(void *data, const u8 *buf, int len)
773 struct ds_device *dev = data;
775 ds_write_block(dev, (u8 *)buf, len);
778 static u8 ds9490r_read_block(void *data, u8 *buf, int len)
780 struct ds_device *dev = data;
783 err = ds_read_block(dev, buf, len);
790 static u8 ds9490r_reset(void *data)
792 struct ds_device *dev = data;
796 memset(&st, 0, sizeof(st));
798 err = ds_reset(dev, &st);
805 static int ds_w1_init(struct ds_device *dev)
807 memset(&dev->master, 0, sizeof(struct w1_bus_master));
809 dev->master.data = dev;
810 dev->master.touch_bit = &ds9490r_touch_bit;
811 dev->master.read_bit = &ds9490r_read_bit;
812 dev->master.write_bit = &ds9490r_write_bit;
813 dev->master.read_byte = &ds9490r_read_byte;
814 dev->master.write_byte = &ds9490r_write_byte;
815 dev->master.read_block = &ds9490r_read_block;
816 dev->master.write_block = &ds9490r_write_block;
817 dev->master.reset_bus = &ds9490r_reset;
819 return w1_add_master_device(&dev->master);
822 static void ds_w1_fini(struct ds_device *dev)
824 w1_remove_master_device(&dev->master);
827 static int ds_probe(struct usb_interface *intf,
828 const struct usb_device_id *udev_id)
830 struct usb_device *udev = interface_to_usbdev(intf);
831 struct usb_endpoint_descriptor *endpoint;
832 struct usb_host_interface *iface_desc;
833 struct ds_device *dev;
836 dev = kmalloc(sizeof(struct ds_device), GFP_KERNEL);
838 printk(KERN_INFO "Failed to allocate new DS9490R structure.\n");
841 dev->udev = usb_get_dev(udev);
846 memset(dev->ep, 0, sizeof(dev->ep));
848 usb_set_intfdata(intf, dev);
850 err = usb_set_interface(dev->udev, intf->altsetting[0].desc.bInterfaceNumber, 3);
852 printk(KERN_ERR "Failed to set alternative setting 3 for %d interface: err=%d.\n",
853 intf->altsetting[0].desc.bInterfaceNumber, err);
857 err = usb_reset_configuration(dev->udev);
859 printk(KERN_ERR "Failed to reset configuration: err=%d.\n", err);
863 iface_desc = &intf->altsetting[0];
864 if (iface_desc->desc.bNumEndpoints != NUM_EP-1) {
865 printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints);
871 * This loop doesn'd show control 0 endpoint,
872 * so we will fill only 1-3 endpoints entry.
874 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
875 endpoint = &iface_desc->endpoint[i].desc;
877 dev->ep[i+1] = endpoint->bEndpointAddress;
879 printk("%d: addr=%x, size=%d, dir=%s, type=%x\n",
880 i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize),
881 (endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT",
882 endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
886 err = ds_w1_init(dev);
890 mutex_lock(&ds_mutex);
891 list_add_tail(&dev->ds_entry, &ds_devices);
892 mutex_unlock(&ds_mutex);
897 usb_set_intfdata(intf, NULL);
898 usb_put_dev(dev->udev);
904 static void ds_disconnect(struct usb_interface *intf)
906 struct ds_device *dev;
908 dev = usb_get_intfdata(intf);
912 mutex_lock(&ds_mutex);
913 list_del(&dev->ds_entry);
914 mutex_unlock(&ds_mutex);
918 usb_set_intfdata(intf, NULL);
920 usb_put_dev(dev->udev);
924 static int ds_init(void)
928 err = usb_register(&ds_driver);
930 printk(KERN_INFO "Failed to register DS9490R USB device: err=%d.\n", err);
937 static void ds_fini(void)
939 usb_deregister(&ds_driver);
942 module_init(ds_init);
943 module_exit(ds_fini);
945 MODULE_LICENSE("GPL");
946 MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
947 MODULE_DESCRIPTION("DS2490 USB <-> W1 bus master driver (DS9490*)");