2 * comedi/drivers/dt9812.c
3 * COMEDI driver for DataTranslation DT9812 USB module
5 * Copyright (C) 2005 Anders Blomdell <anders.blomdell@control.lth.se>
7 * COMEDI - Linux Control and Measurement Device Interface
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
22 * Description: Data Translation DT9812 USB module
23 * Devices: [Data Translation] DT9812 (dt9812)
24 * Author: anders.blomdell@control.lth.se (Anders Blomdell)
25 * Status: in development
26 * Updated: Sun Nov 20 20:18:34 EST 2005
28 * This driver works, but bulk transfers not implemented. Might be a
29 * starting point for someone else. I found out too late that USB has
30 * too high latencies (>1 ms) for my needs.
35 * 1. All writes to command pipe has to be 32 bytes (ISP1181B SHRTP=0 ?)
36 * 2. The DDK source (as of sep 2005) is in error regarding the
37 * input MUX bits (example code says P4, but firmware schematics
41 #include <linux/kernel.h>
42 #include <linux/module.h>
43 #include <linux/errno.h>
44 #include <linux/slab.h>
45 #include <linux/uaccess.h>
47 #include "../comedi_usb.h"
49 #define DT9812_DIAGS_BOARD_INFO_ADDR 0xFBFF
50 #define DT9812_MAX_WRITE_CMD_PIPE_SIZE 32
51 #define DT9812_MAX_READ_CMD_PIPE_SIZE 32
53 /* usb_bulk_msg() timout in milliseconds */
54 #define DT9812_USB_TIMEOUT 1000
57 * See Silican Laboratories C8051F020/1/2/3 manual
59 #define F020_SFR_P4 0x84
60 #define F020_SFR_P1 0x90
61 #define F020_SFR_P2 0xa0
62 #define F020_SFR_P3 0xb0
63 #define F020_SFR_AMX0CF 0xba
64 #define F020_SFR_AMX0SL 0xbb
65 #define F020_SFR_ADC0CF 0xbc
66 #define F020_SFR_ADC0L 0xbe
67 #define F020_SFR_ADC0H 0xbf
68 #define F020_SFR_DAC0L 0xd2
69 #define F020_SFR_DAC0H 0xd3
70 #define F020_SFR_DAC0CN 0xd4
71 #define F020_SFR_DAC1L 0xd5
72 #define F020_SFR_DAC1H 0xd6
73 #define F020_SFR_DAC1CN 0xd7
74 #define F020_SFR_ADC0CN 0xe8
76 #define F020_MASK_ADC0CF_AMP0GN0 0x01
77 #define F020_MASK_ADC0CF_AMP0GN1 0x02
78 #define F020_MASK_ADC0CF_AMP0GN2 0x04
80 #define F020_MASK_ADC0CN_AD0EN 0x80
81 #define F020_MASK_ADC0CN_AD0INT 0x20
82 #define F020_MASK_ADC0CN_AD0BUSY 0x10
84 #define F020_MASK_DACXCN_DACXEN 0x80
87 /* A/D D/A DI DO CT */
88 DT9812_DEVID_DT9812_10, /* 8 2 8 8 1 +/- 10V */
89 DT9812_DEVID_DT9812_2PT5, /* 8 2 8 8 1 0-2.44V */
93 DT9812_GAIN_0PT25 = 1,
103 DT9812_LEAST_USB_FIRMWARE_CMD_CODE = 0,
104 /* Write Flash memory */
105 DT9812_W_FLASH_DATA = 0,
106 /* Read Flash memory misc config info */
107 DT9812_R_FLASH_DATA = 1,
110 * Register read/write commands for processor
113 /* Read a single byte of USB memory */
114 DT9812_R_SINGLE_BYTE_REG = 2,
115 /* Write a single byte of USB memory */
116 DT9812_W_SINGLE_BYTE_REG = 3,
117 /* Multiple Reads of USB memory */
118 DT9812_R_MULTI_BYTE_REG = 4,
119 /* Multiple Writes of USB memory */
120 DT9812_W_MULTI_BYTE_REG = 5,
121 /* Read, (AND) with mask, OR value, then write (single) */
122 DT9812_RMW_SINGLE_BYTE_REG = 6,
123 /* Read, (AND) with mask, OR value, then write (multiple) */
124 DT9812_RMW_MULTI_BYTE_REG = 7,
127 * Register read/write commands for SMBus
130 /* Read a single byte of SMBus */
131 DT9812_R_SINGLE_BYTE_SMBUS = 8,
132 /* Write a single byte of SMBus */
133 DT9812_W_SINGLE_BYTE_SMBUS = 9,
134 /* Multiple Reads of SMBus */
135 DT9812_R_MULTI_BYTE_SMBUS = 10,
136 /* Multiple Writes of SMBus */
137 DT9812_W_MULTI_BYTE_SMBUS = 11,
140 * Register read/write commands for a device
143 /* Read a single byte of a device */
144 DT9812_R_SINGLE_BYTE_DEV = 12,
145 /* Write a single byte of a device */
146 DT9812_W_SINGLE_BYTE_DEV = 13,
147 /* Multiple Reads of a device */
148 DT9812_R_MULTI_BYTE_DEV = 14,
149 /* Multiple Writes of a device */
150 DT9812_W_MULTI_BYTE_DEV = 15,
152 /* Not sure if we'll need this */
153 DT9812_W_DAC_THRESHOLD = 16,
155 /* Set interrupt on change mask */
156 DT9812_W_INT_ON_CHANGE_MASK = 17,
158 /* Write (or Clear) the CGL for the ADC */
160 /* Multiple Reads of USB memory */
161 DT9812_R_MULTI_BYTE_USBMEM = 19,
162 /* Multiple Writes to USB memory */
163 DT9812_W_MULTI_BYTE_USBMEM = 20,
165 /* Issue a start command to a given subsystem */
166 DT9812_START_SUBSYSTEM = 21,
167 /* Issue a stop command to a given subsystem */
168 DT9812_STOP_SUBSYSTEM = 22,
170 /* calibrate the board using CAL_POT_CMD */
171 DT9812_CALIBRATE_POT = 23,
172 /* set the DAC FIFO size */
173 DT9812_W_DAC_FIFO_SIZE = 24,
174 /* Write or Clear the CGL for the DAC */
175 DT9812_W_CGL_DAC = 25,
176 /* Read a single value from a subsystem */
177 DT9812_R_SINGLE_VALUE_CMD = 26,
178 /* Write a single value to a subsystem */
179 DT9812_W_SINGLE_VALUE_CMD = 27,
180 /* Valid DT9812_USB_FIRMWARE_CMD_CODE's will be less than this number */
181 DT9812_MAX_USB_FIRMWARE_CMD_CODE,
184 struct dt9812_flash_data {
189 #define DT9812_MAX_NUM_MULTI_BYTE_RDS \
190 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / sizeof(u8))
192 struct dt9812_read_multi {
194 u8 address[DT9812_MAX_NUM_MULTI_BYTE_RDS];
197 struct dt9812_write_byte {
202 #define DT9812_MAX_NUM_MULTI_BYTE_WRTS \
203 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
204 sizeof(struct dt9812_write_byte))
206 struct dt9812_write_multi {
208 struct dt9812_write_byte write[DT9812_MAX_NUM_MULTI_BYTE_WRTS];
211 struct dt9812_rmw_byte {
217 #define DT9812_MAX_NUM_MULTI_BYTE_RMWS \
218 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
219 sizeof(struct dt9812_rmw_byte))
221 struct dt9812_rmw_multi {
223 struct dt9812_rmw_byte rmw[DT9812_MAX_NUM_MULTI_BYTE_RMWS];
226 struct dt9812_usb_cmd {
229 struct dt9812_flash_data flash_data_info;
230 struct dt9812_read_multi read_multi_info;
231 struct dt9812_write_multi write_multi_info;
232 struct dt9812_rmw_multi rmw_multi_info;
236 struct dt9812_private {
245 static int dt9812_read_info(struct comedi_device *dev,
246 int offset, void *buf, size_t buf_size)
248 struct usb_device *usb = comedi_to_usb_dev(dev);
249 struct dt9812_private *devpriv = dev->private;
250 struct dt9812_usb_cmd *cmd;
255 tbuf_size = max(sizeof(*cmd), buf_size);
257 tbuf = kzalloc(tbuf_size, GFP_KERNEL);
263 cmd->cmd = cpu_to_le32(DT9812_R_FLASH_DATA);
264 cmd->u.flash_data_info.address =
265 cpu_to_le16(DT9812_DIAGS_BOARD_INFO_ADDR + offset);
266 cmd->u.flash_data_info.numbytes = cpu_to_le16(buf_size);
268 /* DT9812 only responds to 32 byte writes!! */
269 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
270 cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
274 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
275 tbuf, buf_size, &count, DT9812_USB_TIMEOUT);
277 if (count == buf_size)
278 memcpy(buf, tbuf, buf_size);
288 static int dt9812_read_multiple_registers(struct comedi_device *dev,
289 int reg_count, u8 *address,
292 struct usb_device *usb = comedi_to_usb_dev(dev);
293 struct dt9812_private *devpriv = dev->private;
294 struct dt9812_usb_cmd *cmd;
299 buf_size = max_t(size_t, sizeof(*cmd), reg_count);
301 buf = kzalloc(buf_size, GFP_KERNEL);
307 cmd->cmd = cpu_to_le32(DT9812_R_MULTI_BYTE_REG);
308 cmd->u.read_multi_info.count = reg_count;
309 for (i = 0; i < reg_count; i++)
310 cmd->u.read_multi_info.address[i] = address[i];
312 /* DT9812 only responds to 32 byte writes!! */
313 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
314 cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
318 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
319 buf, reg_count, &count, DT9812_USB_TIMEOUT);
321 if (count == reg_count)
322 memcpy(value, buf, reg_count);
332 static int dt9812_write_multiple_registers(struct comedi_device *dev,
333 int reg_count, u8 *address,
336 struct usb_device *usb = comedi_to_usb_dev(dev);
337 struct dt9812_private *devpriv = dev->private;
338 struct dt9812_usb_cmd *cmd;
342 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
346 cmd->cmd = cpu_to_le32(DT9812_W_MULTI_BYTE_REG);
347 cmd->u.read_multi_info.count = reg_count;
348 for (i = 0; i < reg_count; i++) {
349 cmd->u.write_multi_info.write[i].address = address[i];
350 cmd->u.write_multi_info.write[i].value = value[i];
353 /* DT9812 only responds to 32 byte writes!! */
354 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
355 cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
361 static int dt9812_rmw_multiple_registers(struct comedi_device *dev,
363 struct dt9812_rmw_byte *rmw)
365 struct usb_device *usb = comedi_to_usb_dev(dev);
366 struct dt9812_private *devpriv = dev->private;
367 struct dt9812_usb_cmd *cmd;
371 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
375 cmd->cmd = cpu_to_le32(DT9812_RMW_MULTI_BYTE_REG);
376 cmd->u.rmw_multi_info.count = reg_count;
377 for (i = 0; i < reg_count; i++)
378 cmd->u.rmw_multi_info.rmw[i] = rmw[i];
380 /* DT9812 only responds to 32 byte writes!! */
381 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
382 cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
388 static int dt9812_digital_in(struct comedi_device *dev, u8 *bits)
390 struct dt9812_private *devpriv = dev->private;
391 u8 reg[2] = { F020_SFR_P3, F020_SFR_P1 };
395 mutex_lock(&devpriv->mut);
396 ret = dt9812_read_multiple_registers(dev, 2, reg, value);
399 * bits 0-6 in F020_SFR_P3 are bits 0-6 in the digital
400 * input port bit 3 in F020_SFR_P1 is bit 7 in the
403 *bits = (value[0] & 0x7f) | ((value[1] & 0x08) << 4);
405 mutex_unlock(&devpriv->mut);
410 static int dt9812_digital_out(struct comedi_device *dev, u8 bits)
412 struct dt9812_private *devpriv = dev->private;
413 u8 reg[1] = { F020_SFR_P2 };
414 u8 value[1] = { bits };
417 mutex_lock(&devpriv->mut);
418 ret = dt9812_write_multiple_registers(dev, 1, reg, value);
419 mutex_unlock(&devpriv->mut);
424 static void dt9812_configure_mux(struct comedi_device *dev,
425 struct dt9812_rmw_byte *rmw, int channel)
427 struct dt9812_private *devpriv = dev->private;
429 if (devpriv->device == DT9812_DEVID_DT9812_10) {
430 /* In the DT9812/10V MUX is selected by P1.5-7 */
431 rmw->address = F020_SFR_P1;
432 rmw->and_mask = 0xe0;
433 rmw->or_value = channel << 5;
435 /* In the DT9812/2.5V, internal mux is selected by bits 0:2 */
436 rmw->address = F020_SFR_AMX0SL;
437 rmw->and_mask = 0xff;
438 rmw->or_value = channel & 0x07;
442 static void dt9812_configure_gain(struct comedi_device *dev,
443 struct dt9812_rmw_byte *rmw,
444 enum dt9812_gain gain)
446 struct dt9812_private *devpriv = dev->private;
448 /* In the DT9812/10V, there is an external gain of 0.5 */
449 if (devpriv->device == DT9812_DEVID_DT9812_10)
452 rmw->address = F020_SFR_ADC0CF;
453 rmw->and_mask = F020_MASK_ADC0CF_AMP0GN2 |
454 F020_MASK_ADC0CF_AMP0GN1 |
455 F020_MASK_ADC0CF_AMP0GN0;
466 case DT9812_GAIN_0PT5:
467 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2 |
468 F020_MASK_ADC0CF_AMP0GN1;
471 /* this should never happen, just use a gain of 1 */
473 rmw->or_value = 0x00;
476 rmw->or_value = F020_MASK_ADC0CF_AMP0GN0;
479 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1;
482 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1 |
483 F020_MASK_ADC0CF_AMP0GN0;
486 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2;
491 static int dt9812_analog_in(struct comedi_device *dev,
492 int channel, u16 *value, enum dt9812_gain gain)
494 struct dt9812_private *devpriv = dev->private;
495 struct dt9812_rmw_byte rmw[3];
504 mutex_lock(&devpriv->mut);
506 /* 1 select the gain */
507 dt9812_configure_gain(dev, &rmw[0], gain);
509 /* 2 set the MUX to select the channel */
510 dt9812_configure_mux(dev, &rmw[1], channel);
512 /* 3 start conversion */
513 rmw[2].address = F020_SFR_ADC0CN;
514 rmw[2].and_mask = 0xff;
515 rmw[2].or_value = F020_MASK_ADC0CN_AD0EN | F020_MASK_ADC0CN_AD0BUSY;
517 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
521 /* read the status and ADC */
522 ret = dt9812_read_multiple_registers(dev, 3, reg, val);
527 * An ADC conversion takes 16 SAR clocks cycles, i.e. about 9us.
528 * Therefore, between the instant that AD0BUSY was set via
529 * dt9812_rmw_multiple_registers and the read of AD0BUSY via
530 * dt9812_read_multiple_registers, the conversion should be complete
531 * since these two operations require two USB transactions each taking
532 * at least a millisecond to complete. However, lets make sure that
533 * conversion is finished.
535 if ((val[0] & (F020_MASK_ADC0CN_AD0INT | F020_MASK_ADC0CN_AD0BUSY)) ==
536 F020_MASK_ADC0CN_AD0INT) {
537 switch (devpriv->device) {
538 case DT9812_DEVID_DT9812_10:
540 * For DT9812-10V the personality module set the
541 * encoding to 2's complement. Hence, convert it before
544 *value = ((val[1] << 8) | val[2]) + 0x800;
546 case DT9812_DEVID_DT9812_2PT5:
547 *value = (val[1] << 8) | val[2];
553 mutex_unlock(&devpriv->mut);
558 static int dt9812_analog_out(struct comedi_device *dev, int channel, u16 value)
560 struct dt9812_private *devpriv = dev->private;
561 struct dt9812_rmw_byte rmw[3];
564 mutex_lock(&devpriv->mut);
568 /* 1. Set DAC mode */
569 rmw[0].address = F020_SFR_DAC0CN;
570 rmw[0].and_mask = 0xff;
571 rmw[0].or_value = F020_MASK_DACXCN_DACXEN;
573 /* 2. load lsb of DAC value first */
574 rmw[1].address = F020_SFR_DAC0L;
575 rmw[1].and_mask = 0xff;
576 rmw[1].or_value = value & 0xff;
578 /* 3. load msb of DAC value next to latch the 12-bit value */
579 rmw[2].address = F020_SFR_DAC0H;
580 rmw[2].and_mask = 0xff;
581 rmw[2].or_value = (value >> 8) & 0xf;
585 /* 1. Set DAC mode */
586 rmw[0].address = F020_SFR_DAC1CN;
587 rmw[0].and_mask = 0xff;
588 rmw[0].or_value = F020_MASK_DACXCN_DACXEN;
590 /* 2. load lsb of DAC value first */
591 rmw[1].address = F020_SFR_DAC1L;
592 rmw[1].and_mask = 0xff;
593 rmw[1].or_value = value & 0xff;
595 /* 3. load msb of DAC value next to latch the 12-bit value */
596 rmw[2].address = F020_SFR_DAC1H;
597 rmw[2].and_mask = 0xff;
598 rmw[2].or_value = (value >> 8) & 0xf;
601 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
603 mutex_unlock(&devpriv->mut);
608 static int dt9812_di_insn_bits(struct comedi_device *dev,
609 struct comedi_subdevice *s,
610 struct comedi_insn *insn,
616 ret = dt9812_digital_in(dev, &bits);
625 static int dt9812_do_insn_bits(struct comedi_device *dev,
626 struct comedi_subdevice *s,
627 struct comedi_insn *insn,
630 if (comedi_dio_update_state(s, data))
631 dt9812_digital_out(dev, s->state);
638 static int dt9812_ai_insn_read(struct comedi_device *dev,
639 struct comedi_subdevice *s,
640 struct comedi_insn *insn,
643 unsigned int chan = CR_CHAN(insn->chanspec);
648 for (i = 0; i < insn->n; i++) {
649 ret = dt9812_analog_in(dev, chan, &val, DT9812_GAIN_1);
658 static int dt9812_ao_insn_read(struct comedi_device *dev,
659 struct comedi_subdevice *s,
660 struct comedi_insn *insn,
663 struct dt9812_private *devpriv = dev->private;
666 mutex_lock(&devpriv->mut);
667 ret = comedi_readback_insn_read(dev, s, insn, data);
668 mutex_unlock(&devpriv->mut);
673 static int dt9812_ao_insn_write(struct comedi_device *dev,
674 struct comedi_subdevice *s,
675 struct comedi_insn *insn,
678 unsigned int chan = CR_CHAN(insn->chanspec);
681 for (i = 0; i < insn->n; i++) {
682 unsigned int val = data[i];
685 ret = dt9812_analog_out(dev, chan, val);
689 s->readback[chan] = val;
695 static int dt9812_find_endpoints(struct comedi_device *dev)
697 struct usb_interface *intf = comedi_to_usb_interface(dev);
698 struct usb_host_interface *host = intf->cur_altsetting;
699 struct dt9812_private *devpriv = dev->private;
700 struct usb_endpoint_descriptor *ep;
703 if (host->desc.bNumEndpoints != 5) {
704 dev_err(dev->class_dev, "Wrong number of endpoints\n");
708 for (i = 0; i < host->desc.bNumEndpoints; ++i) {
711 ep = &host->endpoint[i].desc;
714 /* unused message pipe */
719 devpriv->cmd_wr.addr = ep->bEndpointAddress;
720 devpriv->cmd_wr.size = usb_endpoint_maxp(ep);
724 devpriv->cmd_rd.addr = ep->bEndpointAddress;
725 devpriv->cmd_rd.size = usb_endpoint_maxp(ep);
728 /* unused write stream */
732 /* unused read stream */
736 if ((ep->bEndpointAddress & USB_DIR_IN) != dir) {
737 dev_err(dev->class_dev,
738 "Endpoint has wrong direction\n");
745 static int dt9812_reset_device(struct comedi_device *dev)
747 struct usb_device *usb = comedi_to_usb_dev(dev);
748 struct dt9812_private *devpriv = dev->private;
758 ret = dt9812_read_info(dev, 0, &tmp8, sizeof(tmp8));
761 * Seems like a configuration reset is necessary if driver is
762 * reloaded while device is attached
764 usb_reset_configuration(usb);
765 for (i = 0; i < 10; i++) {
766 ret = dt9812_read_info(dev, 1, &tmp8, sizeof(tmp8));
771 dev_err(dev->class_dev,
772 "unable to reset configuration\n");
777 ret = dt9812_read_info(dev, 1, &tmp16, sizeof(tmp16));
779 dev_err(dev->class_dev, "failed to read vendor id\n");
782 vendor = le16_to_cpu(tmp16);
784 ret = dt9812_read_info(dev, 3, &tmp16, sizeof(tmp16));
786 dev_err(dev->class_dev, "failed to read product id\n");
789 product = le16_to_cpu(tmp16);
791 ret = dt9812_read_info(dev, 5, &tmp16, sizeof(tmp16));
793 dev_err(dev->class_dev, "failed to read device id\n");
796 devpriv->device = le16_to_cpu(tmp16);
798 ret = dt9812_read_info(dev, 7, &tmp32, sizeof(tmp32));
800 dev_err(dev->class_dev, "failed to read serial number\n");
803 serial = le32_to_cpu(tmp32);
805 /* let the user know what node this device is now attached to */
806 dev_info(dev->class_dev, "USB DT9812 (%4.4x.%4.4x.%4.4x) #0x%8.8x\n",
807 vendor, product, devpriv->device, serial);
809 if (devpriv->device != DT9812_DEVID_DT9812_10 &&
810 devpriv->device != DT9812_DEVID_DT9812_2PT5) {
811 dev_err(dev->class_dev, "Unsupported device!\n");
818 static int dt9812_auto_attach(struct comedi_device *dev,
819 unsigned long context)
821 struct usb_interface *intf = comedi_to_usb_interface(dev);
822 struct dt9812_private *devpriv;
823 struct comedi_subdevice *s;
828 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
832 mutex_init(&devpriv->mut);
833 usb_set_intfdata(intf, devpriv);
835 ret = dt9812_find_endpoints(dev);
839 ret = dt9812_reset_device(dev);
843 is_unipolar = (devpriv->device == DT9812_DEVID_DT9812_2PT5);
845 ret = comedi_alloc_subdevices(dev, 4);
849 /* Digital Input subdevice */
850 s = &dev->subdevices[0];
851 s->type = COMEDI_SUBD_DI;
852 s->subdev_flags = SDF_READABLE;
855 s->range_table = &range_digital;
856 s->insn_bits = dt9812_di_insn_bits;
858 /* Digital Output subdevice */
859 s = &dev->subdevices[1];
860 s->type = COMEDI_SUBD_DO;
861 s->subdev_flags = SDF_WRITABLE;
864 s->range_table = &range_digital;
865 s->insn_bits = dt9812_do_insn_bits;
867 /* Analog Input subdevice */
868 s = &dev->subdevices[2];
869 s->type = COMEDI_SUBD_AI;
870 s->subdev_flags = SDF_READABLE | SDF_GROUND;
873 s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
874 s->insn_read = dt9812_ai_insn_read;
876 /* Analog Output subdevice */
877 s = &dev->subdevices[3];
878 s->type = COMEDI_SUBD_AO;
879 s->subdev_flags = SDF_WRITABLE;
882 s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
883 s->insn_write = dt9812_ao_insn_write;
884 s->insn_read = dt9812_ao_insn_read;
886 ret = comedi_alloc_subdev_readback(s);
890 for (i = 0; i < s->n_chan; i++)
891 s->readback[i] = is_unipolar ? 0x0000 : 0x0800;
896 static void dt9812_detach(struct comedi_device *dev)
898 struct usb_interface *intf = comedi_to_usb_interface(dev);
899 struct dt9812_private *devpriv = dev->private;
904 mutex_lock(&devpriv->mut);
906 usb_set_intfdata(intf, NULL);
908 mutex_unlock(&devpriv->mut);
911 static struct comedi_driver dt9812_driver = {
912 .driver_name = "dt9812",
913 .module = THIS_MODULE,
914 .auto_attach = dt9812_auto_attach,
915 .detach = dt9812_detach,
918 static int dt9812_usb_probe(struct usb_interface *intf,
919 const struct usb_device_id *id)
921 return comedi_usb_auto_config(intf, &dt9812_driver, id->driver_info);
924 static const struct usb_device_id dt9812_usb_table[] = {
925 { USB_DEVICE(0x0867, 0x9812) },
928 MODULE_DEVICE_TABLE(usb, dt9812_usb_table);
930 static struct usb_driver dt9812_usb_driver = {
932 .id_table = dt9812_usb_table,
933 .probe = dt9812_usb_probe,
934 .disconnect = comedi_usb_auto_unconfig,
936 module_comedi_usb_driver(dt9812_driver, dt9812_usb_driver);
938 MODULE_AUTHOR("Anders Blomdell <anders.blomdell@control.lth.se>");
939 MODULE_DESCRIPTION("Comedi DT9812 driver");
940 MODULE_LICENSE("GPL");