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 Author: anders.blomdell@control.lth.se (Anders Blomdell)
24 Status: in development
25 Devices: [Data Translation] DT9812 (dt9812)
26 Updated: Sun Nov 20 20:18:34 EST 2005
28 This driver works, but bulk transfers not implemented. Might be a starting point
29 for someone else. I found out too late that USB has too high latencies (>1 ms)
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/init.h>
45 #include <linux/uaccess.h>
46 #include <linux/usb.h>
48 #include "../comedidev.h"
50 #define DT9812_DIAGS_BOARD_INFO_ADDR 0xFBFF
51 #define DT9812_MAX_WRITE_CMD_PIPE_SIZE 32
52 #define DT9812_MAX_READ_CMD_PIPE_SIZE 32
54 /* usb_bulk_msg() timout in milliseconds */
55 #define DT9812_USB_TIMEOUT 1000
58 * See Silican Laboratories C8051F020/1/2/3 manual
60 #define F020_SFR_P4 0x84
61 #define F020_SFR_P1 0x90
62 #define F020_SFR_P2 0xa0
63 #define F020_SFR_P3 0xb0
64 #define F020_SFR_AMX0CF 0xba
65 #define F020_SFR_AMX0SL 0xbb
66 #define F020_SFR_ADC0CF 0xbc
67 #define F020_SFR_ADC0L 0xbe
68 #define F020_SFR_ADC0H 0xbf
69 #define F020_SFR_DAC0L 0xd2
70 #define F020_SFR_DAC0H 0xd3
71 #define F020_SFR_DAC0CN 0xd4
72 #define F020_SFR_DAC1L 0xd5
73 #define F020_SFR_DAC1H 0xd6
74 #define F020_SFR_DAC1CN 0xd7
75 #define F020_SFR_ADC0CN 0xe8
77 #define F020_MASK_ADC0CF_AMP0GN0 0x01
78 #define F020_MASK_ADC0CF_AMP0GN1 0x02
79 #define F020_MASK_ADC0CF_AMP0GN2 0x04
81 #define F020_MASK_ADC0CN_AD0EN 0x80
82 #define F020_MASK_ADC0CN_AD0INT 0x20
83 #define F020_MASK_ADC0CN_AD0BUSY 0x10
85 #define F020_MASK_DACxCN_DACxEN 0x80
88 /* A/D D/A DI DO CT */
89 DT9812_DEVID_DT9812_10, /* 8 2 8 8 1 +/- 10V */
90 DT9812_DEVID_DT9812_2PT5, /* 8 2 8 8 1 0-2.44V */
94 DT9812_GAIN_0PT25 = 1,
104 DT9812_LEAST_USB_FIRMWARE_CMD_CODE = 0,
105 /* Write Flash memory */
106 DT9812_W_FLASH_DATA = 0,
107 /* Read Flash memory misc config info */
108 DT9812_R_FLASH_DATA = 1,
111 * Register read/write commands for processor
114 /* Read a single byte of USB memory */
115 DT9812_R_SINGLE_BYTE_REG = 2,
116 /* Write a single byte of USB memory */
117 DT9812_W_SINGLE_BYTE_REG = 3,
118 /* Multiple Reads of USB memory */
119 DT9812_R_MULTI_BYTE_REG = 4,
120 /* Multiple Writes of USB memory */
121 DT9812_W_MULTI_BYTE_REG = 5,
122 /* Read, (AND) with mask, OR value, then write (single) */
123 DT9812_RMW_SINGLE_BYTE_REG = 6,
124 /* Read, (AND) with mask, OR value, then write (multiple) */
125 DT9812_RMW_MULTI_BYTE_REG = 7,
128 * Register read/write commands for SMBus
131 /* Read a single byte of SMBus */
132 DT9812_R_SINGLE_BYTE_SMBUS = 8,
133 /* Write a single byte of SMBus */
134 DT9812_W_SINGLE_BYTE_SMBUS = 9,
135 /* Multiple Reads of SMBus */
136 DT9812_R_MULTI_BYTE_SMBUS = 10,
137 /* Multiple Writes of SMBus */
138 DT9812_W_MULTI_BYTE_SMBUS = 11,
141 * Register read/write commands for a device
144 /* Read a single byte of a device */
145 DT9812_R_SINGLE_BYTE_DEV = 12,
146 /* Write a single byte of a device */
147 DT9812_W_SINGLE_BYTE_DEV = 13,
148 /* Multiple Reads of a device */
149 DT9812_R_MULTI_BYTE_DEV = 14,
150 /* Multiple Writes of a device */
151 DT9812_W_MULTI_BYTE_DEV = 15,
153 /* Not sure if we'll need this */
154 DT9812_W_DAC_THRESHOLD = 16,
156 /* Set interrupt on change mask */
157 DT9812_W_INT_ON_CHANGE_MASK = 17,
159 /* Write (or Clear) the CGL for the ADC */
161 /* Multiple Reads of USB memory */
162 DT9812_R_MULTI_BYTE_USBMEM = 19,
163 /* Multiple Writes to USB memory */
164 DT9812_W_MULTI_BYTE_USBMEM = 20,
166 /* Issue a start command to a given subsystem */
167 DT9812_START_SUBSYSTEM = 21,
168 /* Issue a stop command to a given subsystem */
169 DT9812_STOP_SUBSYSTEM = 22,
171 /* calibrate the board using CAL_POT_CMD */
172 DT9812_CALIBRATE_POT = 23,
173 /* set the DAC FIFO size */
174 DT9812_W_DAC_FIFO_SIZE = 24,
175 /* Write or Clear the CGL for the DAC */
176 DT9812_W_CGL_DAC = 25,
177 /* Read a single value from a subsystem */
178 DT9812_R_SINGLE_VALUE_CMD = 26,
179 /* Write a single value to a subsystem */
180 DT9812_W_SINGLE_VALUE_CMD = 27,
181 /* Valid DT9812_USB_FIRMWARE_CMD_CODE's will be less than this number */
182 DT9812_MAX_USB_FIRMWARE_CMD_CODE,
185 struct dt9812_flash_data {
190 #define DT9812_MAX_NUM_MULTI_BYTE_RDS \
191 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / sizeof(u8))
193 struct dt9812_read_multi {
195 u8 address[DT9812_MAX_NUM_MULTI_BYTE_RDS];
198 struct dt9812_write_byte {
203 #define DT9812_MAX_NUM_MULTI_BYTE_WRTS \
204 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
205 sizeof(struct dt9812_write_byte))
207 struct dt9812_write_multi {
209 struct dt9812_write_byte write[DT9812_MAX_NUM_MULTI_BYTE_WRTS];
212 struct dt9812_rmw_byte {
218 #define DT9812_MAX_NUM_MULTI_BYTE_RMWS \
219 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
220 sizeof(struct dt9812_rmw_byte))
222 struct dt9812_rmw_multi {
224 struct dt9812_rmw_byte rmw[DT9812_MAX_NUM_MULTI_BYTE_RMWS];
227 struct dt9812_usb_cmd {
230 struct dt9812_flash_data flash_data_info;
231 struct dt9812_read_multi read_multi_info;
232 struct dt9812_write_multi write_multi_info;
233 struct dt9812_rmw_multi rmw_multi_info;
237 struct dt9812_private {
238 struct semaphore sem;
247 static int dt9812_read_info(struct comedi_device *dev,
248 int offset, void *buf, size_t buf_size)
250 struct usb_device *usb = comedi_to_usb_dev(dev);
251 struct dt9812_private *devpriv = dev->private;
252 struct dt9812_usb_cmd cmd;
255 cmd.cmd = cpu_to_le32(DT9812_R_FLASH_DATA);
256 cmd.u.flash_data_info.address =
257 cpu_to_le16(DT9812_DIAGS_BOARD_INFO_ADDR + offset);
258 cmd.u.flash_data_info.numbytes = cpu_to_le16(buf_size);
260 /* DT9812 only responds to 32 byte writes!! */
261 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
262 &cmd, 32, &count, DT9812_USB_TIMEOUT);
266 return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
267 buf, buf_size, &count, DT9812_USB_TIMEOUT);
270 static int dt9812_read_multiple_registers(struct comedi_device *dev,
271 int reg_count, u8 *address,
274 struct usb_device *usb = comedi_to_usb_dev(dev);
275 struct dt9812_private *devpriv = dev->private;
276 struct dt9812_usb_cmd cmd;
279 cmd.cmd = cpu_to_le32(DT9812_R_MULTI_BYTE_REG);
280 cmd.u.read_multi_info.count = reg_count;
281 for (i = 0; i < reg_count; i++)
282 cmd.u.read_multi_info.address[i] = address[i];
284 /* DT9812 only responds to 32 byte writes!! */
285 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
286 &cmd, 32, &count, DT9812_USB_TIMEOUT);
290 return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
291 value, reg_count, &count, DT9812_USB_TIMEOUT);
294 static int dt9812_write_multiple_registers(struct comedi_device *dev,
295 int reg_count, u8 *address,
298 struct usb_device *usb = comedi_to_usb_dev(dev);
299 struct dt9812_private *devpriv = dev->private;
300 struct dt9812_usb_cmd cmd;
303 cmd.cmd = cpu_to_le32(DT9812_W_MULTI_BYTE_REG);
304 cmd.u.read_multi_info.count = reg_count;
305 for (i = 0; i < reg_count; i++) {
306 cmd.u.write_multi_info.write[i].address = address[i];
307 cmd.u.write_multi_info.write[i].value = value[i];
310 /* DT9812 only responds to 32 byte writes!! */
311 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
312 &cmd, 32, &count, DT9812_USB_TIMEOUT);
315 static int dt9812_rmw_multiple_registers(struct comedi_device *dev,
317 struct dt9812_rmw_byte *rmw)
319 struct usb_device *usb = comedi_to_usb_dev(dev);
320 struct dt9812_private *devpriv = dev->private;
321 struct dt9812_usb_cmd cmd;
324 cmd.cmd = cpu_to_le32(DT9812_RMW_MULTI_BYTE_REG);
325 cmd.u.rmw_multi_info.count = reg_count;
326 for (i = 0; i < reg_count; i++)
327 cmd.u.rmw_multi_info.rmw[i] = rmw[i];
329 /* DT9812 only responds to 32 byte writes!! */
330 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
331 &cmd, 32, &count, DT9812_USB_TIMEOUT);
334 static int dt9812_digital_in(struct comedi_device *dev, u8 *bits)
336 struct dt9812_private *devpriv = dev->private;
337 u8 reg[2] = { F020_SFR_P3, F020_SFR_P1 };
342 ret = dt9812_read_multiple_registers(dev, 2, reg, value);
345 * bits 0-6 in F020_SFR_P3 are bits 0-6 in the digital
346 * input port bit 3 in F020_SFR_P1 is bit 7 in the
349 *bits = (value[0] & 0x7f) | ((value[1] & 0x08) << 4);
356 static int dt9812_digital_out(struct comedi_device *dev, u8 bits)
358 struct dt9812_private *devpriv = dev->private;
359 u8 reg[1] = { F020_SFR_P2 };
360 u8 value[1] = { bits };
364 ret = dt9812_write_multiple_registers(dev, 1, reg, value);
370 static void dt9812_configure_mux(struct comedi_device *dev,
371 struct dt9812_rmw_byte *rmw, int channel)
373 struct dt9812_private *devpriv = dev->private;
375 if (devpriv->device == DT9812_DEVID_DT9812_10) {
376 /* In the DT9812/10V MUX is selected by P1.5-7 */
377 rmw->address = F020_SFR_P1;
378 rmw->and_mask = 0xe0;
379 rmw->or_value = channel << 5;
381 /* In the DT9812/2.5V, internal mux is selected by bits 0:2 */
382 rmw->address = F020_SFR_AMX0SL;
383 rmw->and_mask = 0xff;
384 rmw->or_value = channel & 0x07;
388 static void dt9812_configure_gain(struct comedi_device *dev,
389 struct dt9812_rmw_byte *rmw,
390 enum dt9812_gain gain)
392 struct dt9812_private *devpriv = dev->private;
394 /* In the DT9812/10V, there is an external gain of 0.5 */
395 if (devpriv->device == DT9812_DEVID_DT9812_10)
398 rmw->address = F020_SFR_ADC0CF;
399 rmw->and_mask = F020_MASK_ADC0CF_AMP0GN2 |
400 F020_MASK_ADC0CF_AMP0GN1 |
401 F020_MASK_ADC0CF_AMP0GN0;
412 case DT9812_GAIN_0PT5:
413 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2 |
414 F020_MASK_ADC0CF_AMP0GN1;
417 /* this should never happen, just use a gain of 1 */
419 rmw->or_value = 0x00;
422 rmw->or_value = F020_MASK_ADC0CF_AMP0GN0;
425 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1;
428 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1 |
429 F020_MASK_ADC0CF_AMP0GN0;
432 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2;
437 static int dt9812_analog_in(struct comedi_device *dev,
438 int channel, u16 *value, enum dt9812_gain gain)
440 struct dt9812_private *devpriv = dev->private;
441 struct dt9812_rmw_byte rmw[3];
452 /* 1 select the gain */
453 dt9812_configure_gain(dev, &rmw[0], gain);
455 /* 2 set the MUX to select the channel */
456 dt9812_configure_mux(dev, &rmw[1], channel);
458 /* 3 start conversion */
459 rmw[2].address = F020_SFR_ADC0CN;
460 rmw[2].and_mask = 0xff;
461 rmw[2].or_value = F020_MASK_ADC0CN_AD0EN | F020_MASK_ADC0CN_AD0BUSY;
463 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
467 /* read the status and ADC */
468 ret = dt9812_read_multiple_registers(dev, 3, reg, val);
473 * An ADC conversion takes 16 SAR clocks cycles, i.e. about 9us.
474 * Therefore, between the instant that AD0BUSY was set via
475 * dt9812_rmw_multiple_registers and the read of AD0BUSY via
476 * dt9812_read_multiple_registers, the conversion should be complete
477 * since these two operations require two USB transactions each taking
478 * at least a millisecond to complete. However, lets make sure that
479 * conversion is finished.
481 if ((val[0] & (F020_MASK_ADC0CN_AD0INT | F020_MASK_ADC0CN_AD0BUSY)) ==
482 F020_MASK_ADC0CN_AD0INT) {
483 switch (devpriv->device) {
484 case DT9812_DEVID_DT9812_10:
486 * For DT9812-10V the personality module set the
487 * encoding to 2's complement. Hence, convert it before
490 *value = ((val[1] << 8) | val[2]) + 0x800;
492 case DT9812_DEVID_DT9812_2PT5:
493 *value = (val[1] << 8) | val[2];
504 static int dt9812_analog_out(struct comedi_device *dev, int channel, u16 value)
506 struct dt9812_private *devpriv = dev->private;
507 struct dt9812_rmw_byte rmw[3];
514 /* 1. Set DAC mode */
515 rmw[0].address = F020_SFR_DAC0CN;
516 rmw[0].and_mask = 0xff;
517 rmw[0].or_value = F020_MASK_DACxCN_DACxEN;
519 /* 2 load low byte of DAC value first */
520 rmw[1].address = F020_SFR_DAC0L;
521 rmw[1].and_mask = 0xff;
522 rmw[1].or_value = value & 0xff;
524 /* 3 load high byte of DAC value next to latch the
526 rmw[2].address = F020_SFR_DAC0H;
527 rmw[2].and_mask = 0xff;
528 rmw[2].or_value = (value >> 8) & 0xf;
532 /* 1. Set DAC mode */
533 rmw[0].address = F020_SFR_DAC1CN;
534 rmw[0].and_mask = 0xff;
535 rmw[0].or_value = F020_MASK_DACxCN_DACxEN;
537 /* 2 load low byte of DAC value first */
538 rmw[1].address = F020_SFR_DAC1L;
539 rmw[1].and_mask = 0xff;
540 rmw[1].or_value = value & 0xff;
542 /* 3 load high byte of DAC value next to latch the
544 rmw[2].address = F020_SFR_DAC1H;
545 rmw[2].and_mask = 0xff;
546 rmw[2].or_value = (value >> 8) & 0xf;
549 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
550 devpriv->ao_shadow[channel] = value;
557 static int dt9812_di_insn_bits(struct comedi_device *dev,
558 struct comedi_subdevice *s,
559 struct comedi_insn *insn,
565 ret = dt9812_digital_in(dev, &bits);
574 static int dt9812_do_insn_bits(struct comedi_device *dev,
575 struct comedi_subdevice *s,
576 struct comedi_insn *insn,
579 if (comedi_dio_update_state(s, data))
580 dt9812_digital_out(dev, s->state);
587 static int dt9812_ai_insn_read(struct comedi_device *dev,
588 struct comedi_subdevice *s,
589 struct comedi_insn *insn,
592 unsigned int chan = CR_CHAN(insn->chanspec);
597 for (i = 0; i < insn->n; i++) {
598 ret = dt9812_analog_in(dev, chan, &val, DT9812_GAIN_1);
607 static int dt9812_ao_insn_read(struct comedi_device *dev,
608 struct comedi_subdevice *s,
609 struct comedi_insn *insn,
612 struct dt9812_private *devpriv = dev->private;
613 unsigned int chan = CR_CHAN(insn->chanspec);
617 for (i = 0; i < insn->n; i++)
618 data[i] = devpriv->ao_shadow[chan];
624 static int dt9812_ao_insn_write(struct comedi_device *dev,
625 struct comedi_subdevice *s,
626 struct comedi_insn *insn,
629 unsigned int chan = CR_CHAN(insn->chanspec);
633 for (i = 0; i < insn->n; i++) {
634 ret = dt9812_analog_out(dev, chan, data[i]);
642 static int dt9812_find_endpoints(struct comedi_device *dev)
644 struct usb_interface *intf = comedi_to_usb_interface(dev);
645 struct usb_host_interface *host = intf->cur_altsetting;
646 struct dt9812_private *devpriv = dev->private;
647 struct usb_endpoint_descriptor *ep;
650 if (host->desc.bNumEndpoints != 5) {
651 dev_err(dev->class_dev, "Wrong number of endpoints\n");
655 for (i = 0; i < host->desc.bNumEndpoints; ++i) {
657 ep = &host->endpoint[i].desc;
660 /* unused message pipe */
665 devpriv->cmd_wr.addr = ep->bEndpointAddress;
666 devpriv->cmd_wr.size = le16_to_cpu(ep->wMaxPacketSize);
670 devpriv->cmd_rd.addr = ep->bEndpointAddress;
671 devpriv->cmd_rd.size = le16_to_cpu(ep->wMaxPacketSize);
674 /* unused write stream */
678 /* unused read stream */
682 if ((ep->bEndpointAddress & USB_DIR_IN) != dir) {
683 dev_err(dev->class_dev,
684 "Endpoint has wrong direction\n");
691 static int dt9812_reset_device(struct comedi_device *dev)
693 struct usb_device *usb = comedi_to_usb_dev(dev);
694 struct dt9812_private *devpriv = dev->private;
704 ret = dt9812_read_info(dev, 0, &tmp8, sizeof(tmp8));
707 * Seems like a configuration reset is necessary if driver is
708 * reloaded while device is attached
710 usb_reset_configuration(usb);
711 for (i = 0; i < 10; i++) {
712 ret = dt9812_read_info(dev, 1, &tmp8, sizeof(tmp8));
717 dev_err(dev->class_dev,
718 "unable to reset configuration\n");
723 ret = dt9812_read_info(dev, 1, &tmp16, sizeof(tmp16));
725 dev_err(dev->class_dev, "failed to read vendor id\n");
728 vendor = le16_to_cpu(tmp16);
730 ret = dt9812_read_info(dev, 3, &tmp16, sizeof(tmp16));
732 dev_err(dev->class_dev, "failed to read product id\n");
735 product = le16_to_cpu(tmp16);
737 ret = dt9812_read_info(dev, 5, &tmp16, sizeof(tmp16));
739 dev_err(dev->class_dev, "failed to read device id\n");
742 devpriv->device = le16_to_cpu(tmp16);
744 ret = dt9812_read_info(dev, 7, &tmp32, sizeof(tmp32));
746 dev_err(dev->class_dev, "failed to read serial number\n");
749 serial = le32_to_cpu(tmp32);
751 /* let the user know what node this device is now attached to */
752 dev_info(dev->class_dev, "USB DT9812 (%4.4x.%4.4x.%4.4x) #0x%8.8x\n",
753 vendor, product, devpriv->device, serial);
755 if (devpriv->device != DT9812_DEVID_DT9812_10 &&
756 devpriv->device != DT9812_DEVID_DT9812_2PT5) {
757 dev_err(dev->class_dev, "Unsupported device!\n");
764 static int dt9812_auto_attach(struct comedi_device *dev,
765 unsigned long context)
767 struct usb_interface *intf = comedi_to_usb_interface(dev);
768 struct dt9812_private *devpriv;
769 struct comedi_subdevice *s;
773 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
777 sema_init(&devpriv->sem, 1);
778 usb_set_intfdata(intf, devpriv);
780 ret = dt9812_find_endpoints(dev);
784 ret = dt9812_reset_device(dev);
788 is_unipolar = (devpriv->device == DT9812_DEVID_DT9812_2PT5);
790 ret = comedi_alloc_subdevices(dev, 4);
794 /* Digital Input subdevice */
795 s = &dev->subdevices[0];
796 s->type = COMEDI_SUBD_DI;
797 s->subdev_flags = SDF_READABLE;
800 s->range_table = &range_digital;
801 s->insn_bits = dt9812_di_insn_bits;
803 /* Digital Output subdevice */
804 s = &dev->subdevices[1];
805 s->type = COMEDI_SUBD_DO;
806 s->subdev_flags = SDF_WRITEABLE;
809 s->range_table = &range_digital;
810 s->insn_bits = dt9812_do_insn_bits;
812 /* Analog Input subdevice */
813 s = &dev->subdevices[2];
814 s->type = COMEDI_SUBD_AI;
815 s->subdev_flags = SDF_READABLE | SDF_GROUND;
818 s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
819 s->insn_read = dt9812_ai_insn_read;
821 /* Analog Output subdevice */
822 s = &dev->subdevices[3];
823 s->type = COMEDI_SUBD_AO;
824 s->subdev_flags = SDF_WRITEABLE;
827 s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
828 s->insn_write = dt9812_ao_insn_write;
829 s->insn_read = dt9812_ao_insn_read;
831 devpriv->ao_shadow[0] = is_unipolar ? 0x0000 : 0x0800;
832 devpriv->ao_shadow[1] = is_unipolar ? 0x0000 : 0x0800;
837 static void dt9812_detach(struct comedi_device *dev)
839 struct usb_interface *intf = comedi_to_usb_interface(dev);
840 struct dt9812_private *devpriv = dev->private;
847 usb_set_intfdata(intf, NULL);
852 static struct comedi_driver dt9812_driver = {
853 .driver_name = "dt9812",
854 .module = THIS_MODULE,
855 .auto_attach = dt9812_auto_attach,
856 .detach = dt9812_detach,
859 static int dt9812_usb_probe(struct usb_interface *intf,
860 const struct usb_device_id *id)
862 return comedi_usb_auto_config(intf, &dt9812_driver, id->driver_info);
865 static const struct usb_device_id dt9812_usb_table[] = {
866 { USB_DEVICE(0x0867, 0x9812) },
869 MODULE_DEVICE_TABLE(usb, dt9812_usb_table);
871 static struct usb_driver dt9812_usb_driver = {
873 .id_table = dt9812_usb_table,
874 .probe = dt9812_usb_probe,
875 .disconnect = comedi_usb_auto_unconfig,
877 module_comedi_usb_driver(dt9812_driver, dt9812_usb_driver);
879 MODULE_AUTHOR("Anders Blomdell <anders.blomdell@control.lth.se>");
880 MODULE_DESCRIPTION("Comedi DT9812 driver");
881 MODULE_LICENSE("GPL");