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/uaccess.h>
45 #include <linux/usb.h>
47 #include "../comedidev.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 {
237 struct semaphore sem;
246 static int dt9812_read_info(struct comedi_device *dev,
247 int offset, void *buf, size_t buf_size)
249 struct usb_device *usb = comedi_to_usb_dev(dev);
250 struct dt9812_private *devpriv = dev->private;
251 struct dt9812_usb_cmd cmd;
254 cmd.cmd = cpu_to_le32(DT9812_R_FLASH_DATA);
255 cmd.u.flash_data_info.address =
256 cpu_to_le16(DT9812_DIAGS_BOARD_INFO_ADDR + offset);
257 cmd.u.flash_data_info.numbytes = cpu_to_le16(buf_size);
259 /* DT9812 only responds to 32 byte writes!! */
260 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
261 &cmd, 32, &count, DT9812_USB_TIMEOUT);
265 return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
266 buf, buf_size, &count, DT9812_USB_TIMEOUT);
269 static int dt9812_read_multiple_registers(struct comedi_device *dev,
270 int reg_count, u8 *address,
273 struct usb_device *usb = comedi_to_usb_dev(dev);
274 struct dt9812_private *devpriv = dev->private;
275 struct dt9812_usb_cmd cmd;
278 cmd.cmd = cpu_to_le32(DT9812_R_MULTI_BYTE_REG);
279 cmd.u.read_multi_info.count = reg_count;
280 for (i = 0; i < reg_count; i++)
281 cmd.u.read_multi_info.address[i] = address[i];
283 /* DT9812 only responds to 32 byte writes!! */
284 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
285 &cmd, 32, &count, DT9812_USB_TIMEOUT);
289 return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
290 value, reg_count, &count, DT9812_USB_TIMEOUT);
293 static int dt9812_write_multiple_registers(struct comedi_device *dev,
294 int reg_count, u8 *address,
297 struct usb_device *usb = comedi_to_usb_dev(dev);
298 struct dt9812_private *devpriv = dev->private;
299 struct dt9812_usb_cmd cmd;
302 cmd.cmd = cpu_to_le32(DT9812_W_MULTI_BYTE_REG);
303 cmd.u.read_multi_info.count = reg_count;
304 for (i = 0; i < reg_count; i++) {
305 cmd.u.write_multi_info.write[i].address = address[i];
306 cmd.u.write_multi_info.write[i].value = value[i];
309 /* DT9812 only responds to 32 byte writes!! */
310 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
311 &cmd, 32, &count, DT9812_USB_TIMEOUT);
314 static int dt9812_rmw_multiple_registers(struct comedi_device *dev,
316 struct dt9812_rmw_byte *rmw)
318 struct usb_device *usb = comedi_to_usb_dev(dev);
319 struct dt9812_private *devpriv = dev->private;
320 struct dt9812_usb_cmd cmd;
323 cmd.cmd = cpu_to_le32(DT9812_RMW_MULTI_BYTE_REG);
324 cmd.u.rmw_multi_info.count = reg_count;
325 for (i = 0; i < reg_count; i++)
326 cmd.u.rmw_multi_info.rmw[i] = rmw[i];
328 /* DT9812 only responds to 32 byte writes!! */
329 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
330 &cmd, 32, &count, DT9812_USB_TIMEOUT);
333 static int dt9812_digital_in(struct comedi_device *dev, u8 *bits)
335 struct dt9812_private *devpriv = dev->private;
336 u8 reg[2] = { F020_SFR_P3, F020_SFR_P1 };
341 ret = dt9812_read_multiple_registers(dev, 2, reg, value);
344 * bits 0-6 in F020_SFR_P3 are bits 0-6 in the digital
345 * input port bit 3 in F020_SFR_P1 is bit 7 in the
348 *bits = (value[0] & 0x7f) | ((value[1] & 0x08) << 4);
355 static int dt9812_digital_out(struct comedi_device *dev, u8 bits)
357 struct dt9812_private *devpriv = dev->private;
358 u8 reg[1] = { F020_SFR_P2 };
359 u8 value[1] = { bits };
363 ret = dt9812_write_multiple_registers(dev, 1, reg, value);
369 static void dt9812_configure_mux(struct comedi_device *dev,
370 struct dt9812_rmw_byte *rmw, int channel)
372 struct dt9812_private *devpriv = dev->private;
374 if (devpriv->device == DT9812_DEVID_DT9812_10) {
375 /* In the DT9812/10V MUX is selected by P1.5-7 */
376 rmw->address = F020_SFR_P1;
377 rmw->and_mask = 0xe0;
378 rmw->or_value = channel << 5;
380 /* In the DT9812/2.5V, internal mux is selected by bits 0:2 */
381 rmw->address = F020_SFR_AMX0SL;
382 rmw->and_mask = 0xff;
383 rmw->or_value = channel & 0x07;
387 static void dt9812_configure_gain(struct comedi_device *dev,
388 struct dt9812_rmw_byte *rmw,
389 enum dt9812_gain gain)
391 struct dt9812_private *devpriv = dev->private;
393 /* In the DT9812/10V, there is an external gain of 0.5 */
394 if (devpriv->device == DT9812_DEVID_DT9812_10)
397 rmw->address = F020_SFR_ADC0CF;
398 rmw->and_mask = F020_MASK_ADC0CF_AMP0GN2 |
399 F020_MASK_ADC0CF_AMP0GN1 |
400 F020_MASK_ADC0CF_AMP0GN0;
411 case DT9812_GAIN_0PT5:
412 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2 |
413 F020_MASK_ADC0CF_AMP0GN1;
416 /* this should never happen, just use a gain of 1 */
418 rmw->or_value = 0x00;
421 rmw->or_value = F020_MASK_ADC0CF_AMP0GN0;
424 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1;
427 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1 |
428 F020_MASK_ADC0CF_AMP0GN0;
431 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2;
436 static int dt9812_analog_in(struct comedi_device *dev,
437 int channel, u16 *value, enum dt9812_gain gain)
439 struct dt9812_private *devpriv = dev->private;
440 struct dt9812_rmw_byte rmw[3];
451 /* 1 select the gain */
452 dt9812_configure_gain(dev, &rmw[0], gain);
454 /* 2 set the MUX to select the channel */
455 dt9812_configure_mux(dev, &rmw[1], channel);
457 /* 3 start conversion */
458 rmw[2].address = F020_SFR_ADC0CN;
459 rmw[2].and_mask = 0xff;
460 rmw[2].or_value = F020_MASK_ADC0CN_AD0EN | F020_MASK_ADC0CN_AD0BUSY;
462 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
466 /* read the status and ADC */
467 ret = dt9812_read_multiple_registers(dev, 3, reg, val);
472 * An ADC conversion takes 16 SAR clocks cycles, i.e. about 9us.
473 * Therefore, between the instant that AD0BUSY was set via
474 * dt9812_rmw_multiple_registers and the read of AD0BUSY via
475 * dt9812_read_multiple_registers, the conversion should be complete
476 * since these two operations require two USB transactions each taking
477 * at least a millisecond to complete. However, lets make sure that
478 * conversion is finished.
480 if ((val[0] & (F020_MASK_ADC0CN_AD0INT | F020_MASK_ADC0CN_AD0BUSY)) ==
481 F020_MASK_ADC0CN_AD0INT) {
482 switch (devpriv->device) {
483 case DT9812_DEVID_DT9812_10:
485 * For DT9812-10V the personality module set the
486 * encoding to 2's complement. Hence, convert it before
489 *value = ((val[1] << 8) | val[2]) + 0x800;
491 case DT9812_DEVID_DT9812_2PT5:
492 *value = (val[1] << 8) | val[2];
503 static int dt9812_analog_out(struct comedi_device *dev, int channel, u16 value)
505 struct dt9812_private *devpriv = dev->private;
506 struct dt9812_rmw_byte rmw[3];
513 /* 1. Set DAC mode */
514 rmw[0].address = F020_SFR_DAC0CN;
515 rmw[0].and_mask = 0xff;
516 rmw[0].or_value = F020_MASK_DACxCN_DACxEN;
518 /* 2 load low byte of DAC value first */
519 rmw[1].address = F020_SFR_DAC0L;
520 rmw[1].and_mask = 0xff;
521 rmw[1].or_value = value & 0xff;
523 /* 3 load high byte of DAC value next to latch the
525 rmw[2].address = F020_SFR_DAC0H;
526 rmw[2].and_mask = 0xff;
527 rmw[2].or_value = (value >> 8) & 0xf;
531 /* 1. Set DAC mode */
532 rmw[0].address = F020_SFR_DAC1CN;
533 rmw[0].and_mask = 0xff;
534 rmw[0].or_value = F020_MASK_DACxCN_DACxEN;
536 /* 2 load low byte of DAC value first */
537 rmw[1].address = F020_SFR_DAC1L;
538 rmw[1].and_mask = 0xff;
539 rmw[1].or_value = value & 0xff;
541 /* 3 load high byte of DAC value next to latch the
543 rmw[2].address = F020_SFR_DAC1H;
544 rmw[2].and_mask = 0xff;
545 rmw[2].or_value = (value >> 8) & 0xf;
548 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
549 devpriv->ao_shadow[channel] = value;
556 static int dt9812_di_insn_bits(struct comedi_device *dev,
557 struct comedi_subdevice *s,
558 struct comedi_insn *insn,
564 ret = dt9812_digital_in(dev, &bits);
573 static int dt9812_do_insn_bits(struct comedi_device *dev,
574 struct comedi_subdevice *s,
575 struct comedi_insn *insn,
578 if (comedi_dio_update_state(s, data))
579 dt9812_digital_out(dev, s->state);
586 static int dt9812_ai_insn_read(struct comedi_device *dev,
587 struct comedi_subdevice *s,
588 struct comedi_insn *insn,
591 unsigned int chan = CR_CHAN(insn->chanspec);
596 for (i = 0; i < insn->n; i++) {
597 ret = dt9812_analog_in(dev, chan, &val, DT9812_GAIN_1);
606 static int dt9812_ao_insn_read(struct comedi_device *dev,
607 struct comedi_subdevice *s,
608 struct comedi_insn *insn,
611 struct dt9812_private *devpriv = dev->private;
612 unsigned int chan = CR_CHAN(insn->chanspec);
616 for (i = 0; i < insn->n; i++)
617 data[i] = devpriv->ao_shadow[chan];
623 static int dt9812_ao_insn_write(struct comedi_device *dev,
624 struct comedi_subdevice *s,
625 struct comedi_insn *insn,
628 unsigned int chan = CR_CHAN(insn->chanspec);
632 for (i = 0; i < insn->n; i++) {
633 ret = dt9812_analog_out(dev, chan, data[i]);
641 static int dt9812_find_endpoints(struct comedi_device *dev)
643 struct usb_interface *intf = comedi_to_usb_interface(dev);
644 struct usb_host_interface *host = intf->cur_altsetting;
645 struct dt9812_private *devpriv = dev->private;
646 struct usb_endpoint_descriptor *ep;
649 if (host->desc.bNumEndpoints != 5) {
650 dev_err(dev->class_dev, "Wrong number of endpoints\n");
654 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");