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/module.h>
46 #include <linux/uaccess.h>
47 #include <linux/usb.h>
49 #include "../comedidev.h"
51 #define DT9812_DIAGS_BOARD_INFO_ADDR 0xFBFF
52 #define DT9812_MAX_WRITE_CMD_PIPE_SIZE 32
53 #define DT9812_MAX_READ_CMD_PIPE_SIZE 32
55 /* usb_bulk_msg() timout in milliseconds */
56 #define DT9812_USB_TIMEOUT 1000
59 * See Silican Laboratories C8051F020/1/2/3 manual
61 #define F020_SFR_P4 0x84
62 #define F020_SFR_P1 0x90
63 #define F020_SFR_P2 0xa0
64 #define F020_SFR_P3 0xb0
65 #define F020_SFR_AMX0CF 0xba
66 #define F020_SFR_AMX0SL 0xbb
67 #define F020_SFR_ADC0CF 0xbc
68 #define F020_SFR_ADC0L 0xbe
69 #define F020_SFR_ADC0H 0xbf
70 #define F020_SFR_DAC0L 0xd2
71 #define F020_SFR_DAC0H 0xd3
72 #define F020_SFR_DAC0CN 0xd4
73 #define F020_SFR_DAC1L 0xd5
74 #define F020_SFR_DAC1H 0xd6
75 #define F020_SFR_DAC1CN 0xd7
76 #define F020_SFR_ADC0CN 0xe8
78 #define F020_MASK_ADC0CF_AMP0GN0 0x01
79 #define F020_MASK_ADC0CF_AMP0GN1 0x02
80 #define F020_MASK_ADC0CF_AMP0GN2 0x04
82 #define F020_MASK_ADC0CN_AD0EN 0x80
83 #define F020_MASK_ADC0CN_AD0INT 0x20
84 #define F020_MASK_ADC0CN_AD0BUSY 0x10
86 #define F020_MASK_DACxCN_DACxEN 0x80
89 /* A/D D/A DI DO CT */
90 DT9812_DEVID_DT9812_10, /* 8 2 8 8 1 +/- 10V */
91 DT9812_DEVID_DT9812_2PT5, /* 8 2 8 8 1 0-2.44V */
93 DT9812_DEVID_DT9813, /* 16 2 4 4 1 +/- 10V */
94 DT9812_DEVID_DT9814 /* 24 2 0 0 1 +/- 10V */
99 DT9812_GAIN_0PT25 = 1,
100 DT9812_GAIN_0PT5 = 2,
109 DT9812_LEAST_USB_FIRMWARE_CMD_CODE = 0,
110 /* Write Flash memory */
111 DT9812_W_FLASH_DATA = 0,
112 /* Read Flash memory misc config info */
113 DT9812_R_FLASH_DATA = 1,
116 * Register read/write commands for processor
119 /* Read a single byte of USB memory */
120 DT9812_R_SINGLE_BYTE_REG = 2,
121 /* Write a single byte of USB memory */
122 DT9812_W_SINGLE_BYTE_REG = 3,
123 /* Multiple Reads of USB memory */
124 DT9812_R_MULTI_BYTE_REG = 4,
125 /* Multiple Writes of USB memory */
126 DT9812_W_MULTI_BYTE_REG = 5,
127 /* Read, (AND) with mask, OR value, then write (single) */
128 DT9812_RMW_SINGLE_BYTE_REG = 6,
129 /* Read, (AND) with mask, OR value, then write (multiple) */
130 DT9812_RMW_MULTI_BYTE_REG = 7,
133 * Register read/write commands for SMBus
136 /* Read a single byte of SMBus */
137 DT9812_R_SINGLE_BYTE_SMBUS = 8,
138 /* Write a single byte of SMBus */
139 DT9812_W_SINGLE_BYTE_SMBUS = 9,
140 /* Multiple Reads of SMBus */
141 DT9812_R_MULTI_BYTE_SMBUS = 10,
142 /* Multiple Writes of SMBus */
143 DT9812_W_MULTI_BYTE_SMBUS = 11,
146 * Register read/write commands for a device
149 /* Read a single byte of a device */
150 DT9812_R_SINGLE_BYTE_DEV = 12,
151 /* Write a single byte of a device */
152 DT9812_W_SINGLE_BYTE_DEV = 13,
153 /* Multiple Reads of a device */
154 DT9812_R_MULTI_BYTE_DEV = 14,
155 /* Multiple Writes of a device */
156 DT9812_W_MULTI_BYTE_DEV = 15,
158 /* Not sure if we'll need this */
159 DT9812_W_DAC_THRESHOLD = 16,
161 /* Set interrupt on change mask */
162 DT9812_W_INT_ON_CHANGE_MASK = 17,
164 /* Write (or Clear) the CGL for the ADC */
166 /* Multiple Reads of USB memory */
167 DT9812_R_MULTI_BYTE_USBMEM = 19,
168 /* Multiple Writes to USB memory */
169 DT9812_W_MULTI_BYTE_USBMEM = 20,
171 /* Issue a start command to a given subsystem */
172 DT9812_START_SUBSYSTEM = 21,
173 /* Issue a stop command to a given subsystem */
174 DT9812_STOP_SUBSYSTEM = 22,
176 /* calibrate the board using CAL_POT_CMD */
177 DT9812_CALIBRATE_POT = 23,
178 /* set the DAC FIFO size */
179 DT9812_W_DAC_FIFO_SIZE = 24,
180 /* Write or Clear the CGL for the DAC */
181 DT9812_W_CGL_DAC = 25,
182 /* Read a single value from a subsystem */
183 DT9812_R_SINGLE_VALUE_CMD = 26,
184 /* Write a single value to a subsystem */
185 DT9812_W_SINGLE_VALUE_CMD = 27,
186 /* Valid DT9812_USB_FIRMWARE_CMD_CODE's will be less than this number */
187 DT9812_MAX_USB_FIRMWARE_CMD_CODE,
190 struct dt9812_flash_data {
195 #define DT9812_MAX_NUM_MULTI_BYTE_RDS \
196 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / sizeof(u8))
198 struct dt9812_read_multi {
200 u8 address[DT9812_MAX_NUM_MULTI_BYTE_RDS];
203 struct dt9812_write_byte {
208 #define DT9812_MAX_NUM_MULTI_BYTE_WRTS \
209 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
210 sizeof(struct dt9812_write_byte))
212 struct dt9812_write_multi {
214 struct dt9812_write_byte write[DT9812_MAX_NUM_MULTI_BYTE_WRTS];
217 struct dt9812_rmw_byte {
223 #define DT9812_MAX_NUM_MULTI_BYTE_RMWS \
224 ((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
225 sizeof(struct dt9812_rmw_byte))
227 struct dt9812_rmw_multi {
229 struct dt9812_rmw_byte rmw[DT9812_MAX_NUM_MULTI_BYTE_RMWS];
232 struct dt9812_usb_cmd {
235 struct dt9812_flash_data flash_data_info;
236 struct dt9812_read_multi read_multi_info;
237 struct dt9812_write_multi write_multi_info;
238 struct dt9812_rmw_multi rmw_multi_info;
242 struct dt9812_private {
243 struct semaphore sem;
252 static int dt9812_read_info(struct comedi_device *dev,
253 int offset, void *buf, size_t buf_size)
255 struct usb_device *usb = comedi_to_usb_dev(dev);
256 struct dt9812_private *devpriv = dev->private;
257 struct dt9812_usb_cmd cmd;
260 cmd.cmd = cpu_to_le32(DT9812_R_FLASH_DATA);
261 cmd.u.flash_data_info.address =
262 cpu_to_le16(DT9812_DIAGS_BOARD_INFO_ADDR + offset);
263 cmd.u.flash_data_info.numbytes = cpu_to_le16(buf_size);
265 /* DT9812 only responds to 32 byte writes!! */
266 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
267 &cmd, 32, &count, DT9812_USB_TIMEOUT);
271 return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
272 buf, buf_size, &count, DT9812_USB_TIMEOUT);
275 static int dt9812_read_multiple_registers(struct comedi_device *dev,
276 int reg_count, u8 *address,
279 struct usb_device *usb = comedi_to_usb_dev(dev);
280 struct dt9812_private *devpriv = dev->private;
281 struct dt9812_usb_cmd cmd;
284 cmd.cmd = cpu_to_le32(DT9812_R_MULTI_BYTE_REG);
285 cmd.u.read_multi_info.count = reg_count;
286 for (i = 0; i < reg_count; i++)
287 cmd.u.read_multi_info.address[i] = address[i];
289 /* DT9812 only responds to 32 byte writes!! */
290 ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
291 &cmd, 32, &count, DT9812_USB_TIMEOUT);
295 return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
296 value, reg_count, &count, DT9812_USB_TIMEOUT);
299 static int dt9812_write_multiple_registers(struct comedi_device *dev,
300 int reg_count, u8 *address,
303 struct usb_device *usb = comedi_to_usb_dev(dev);
304 struct dt9812_private *devpriv = dev->private;
305 struct dt9812_usb_cmd cmd;
308 cmd.cmd = cpu_to_le32(DT9812_W_MULTI_BYTE_REG);
309 cmd.u.read_multi_info.count = reg_count;
310 for (i = 0; i < reg_count; i++) {
311 cmd.u.write_multi_info.write[i].address = address[i];
312 cmd.u.write_multi_info.write[i].value = value[i];
315 /* DT9812 only responds to 32 byte writes!! */
316 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
317 &cmd, 32, &count, DT9812_USB_TIMEOUT);
320 static int dt9812_rmw_multiple_registers(struct comedi_device *dev,
322 struct dt9812_rmw_byte *rmw)
324 struct usb_device *usb = comedi_to_usb_dev(dev);
325 struct dt9812_private *devpriv = dev->private;
326 struct dt9812_usb_cmd cmd;
329 cmd.cmd = cpu_to_le32(DT9812_RMW_MULTI_BYTE_REG);
330 cmd.u.rmw_multi_info.count = reg_count;
331 for (i = 0; i < reg_count; i++)
332 cmd.u.rmw_multi_info.rmw[i] = rmw[i];
334 /* DT9812 only responds to 32 byte writes!! */
335 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
336 &cmd, 32, &count, DT9812_USB_TIMEOUT);
339 static int dt9812_digital_in(struct comedi_device *dev, u8 *bits)
341 struct dt9812_private *devpriv = dev->private;
342 u8 reg[2] = { F020_SFR_P3, F020_SFR_P1 };
347 ret = dt9812_read_multiple_registers(dev, 2, reg, value);
350 * bits 0-6 in F020_SFR_P3 are bits 0-6 in the digital
351 * input port bit 3 in F020_SFR_P1 is bit 7 in the
354 *bits = (value[0] & 0x7f) | ((value[1] & 0x08) << 4);
361 static int dt9812_digital_out(struct comedi_device *dev, u8 bits)
363 struct dt9812_private *devpriv = dev->private;
364 u8 reg[1] = { F020_SFR_P2 };
365 u8 value[1] = { bits };
369 ret = dt9812_write_multiple_registers(dev, 1, reg, value);
375 static void dt9812_configure_mux(struct comedi_device *dev,
376 struct dt9812_rmw_byte *rmw, int channel)
378 struct dt9812_private *devpriv = dev->private;
380 if (devpriv->device == DT9812_DEVID_DT9812_10) {
381 /* In the DT9812/10V MUX is selected by P1.5-7 */
382 rmw->address = F020_SFR_P1;
383 rmw->and_mask = 0xe0;
384 rmw->or_value = channel << 5;
386 /* In the DT9812/2.5V, internal mux is selected by bits 0:2 */
387 rmw->address = F020_SFR_AMX0SL;
388 rmw->and_mask = 0xff;
389 rmw->or_value = channel & 0x07;
393 static void dt9812_configure_gain(struct comedi_device *dev,
394 struct dt9812_rmw_byte *rmw,
395 enum dt9812_gain gain)
397 struct dt9812_private *devpriv = dev->private;
399 /* In the DT9812/10V, there is an external gain of 0.5 */
400 if (devpriv->device == DT9812_DEVID_DT9812_10)
403 rmw->address = F020_SFR_ADC0CF;
404 rmw->and_mask = F020_MASK_ADC0CF_AMP0GN2 |
405 F020_MASK_ADC0CF_AMP0GN1 |
406 F020_MASK_ADC0CF_AMP0GN0;
417 case DT9812_GAIN_0PT5:
418 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2 |
419 F020_MASK_ADC0CF_AMP0GN1;
422 /* this should never happen, just use a gain of 1 */
424 rmw->or_value = 0x00;
427 rmw->or_value = F020_MASK_ADC0CF_AMP0GN0;
430 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1;
433 rmw->or_value = F020_MASK_ADC0CF_AMP0GN1 |
434 F020_MASK_ADC0CF_AMP0GN0;
437 rmw->or_value = F020_MASK_ADC0CF_AMP0GN2;
442 static int dt9812_analog_in(struct comedi_device *dev,
443 int channel, u16 *value, enum dt9812_gain gain)
445 struct dt9812_private *devpriv = dev->private;
446 struct dt9812_rmw_byte rmw[3];
457 /* 1 select the gain */
458 dt9812_configure_gain(dev, &rmw[0], gain);
460 /* 2 set the MUX to select the channel */
461 dt9812_configure_mux(dev, &rmw[1], channel);
463 /* 3 start conversion */
464 rmw[2].address = F020_SFR_ADC0CN;
465 rmw[2].and_mask = 0xff;
466 rmw[2].or_value = F020_MASK_ADC0CN_AD0EN | F020_MASK_ADC0CN_AD0BUSY;
468 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
472 /* read the status and ADC */
473 ret = dt9812_read_multiple_registers(dev, 3, reg, val);
478 * An ADC conversion takes 16 SAR clocks cycles, i.e. about 9us.
479 * Therefore, between the instant that AD0BUSY was set via
480 * dt9812_rmw_multiple_registers and the read of AD0BUSY via
481 * dt9812_read_multiple_registers, the conversion should be complete
482 * since these two operations require two USB transactions each taking
483 * at least a millisecond to complete. However, lets make sure that
484 * conversion is finished.
486 if ((val[0] & (F020_MASK_ADC0CN_AD0INT | F020_MASK_ADC0CN_AD0BUSY)) ==
487 F020_MASK_ADC0CN_AD0INT) {
488 switch (devpriv->device) {
489 case DT9812_DEVID_DT9812_10:
491 * For DT9812-10V the personality module set the
492 * encoding to 2's complement. Hence, convert it before
495 *value = ((val[1] << 8) | val[2]) + 0x800;
497 case DT9812_DEVID_DT9812_2PT5:
498 *value = (val[1] << 8) | val[2];
509 static int dt9812_analog_out(struct comedi_device *dev, int channel, u16 value)
511 struct dt9812_private *devpriv = dev->private;
512 struct dt9812_rmw_byte rmw[3];
519 /* 1. Set DAC mode */
520 rmw[0].address = F020_SFR_DAC0CN;
521 rmw[0].and_mask = 0xff;
522 rmw[0].or_value = F020_MASK_DACxCN_DACxEN;
524 /* 2 load low byte of DAC value first */
525 rmw[1].address = F020_SFR_DAC0L;
526 rmw[1].and_mask = 0xff;
527 rmw[1].or_value = value & 0xff;
529 /* 3 load high byte of DAC value next to latch the
531 rmw[2].address = F020_SFR_DAC0H;
532 rmw[2].and_mask = 0xff;
533 rmw[2].or_value = (value >> 8) & 0xf;
537 /* 1. Set DAC mode */
538 rmw[0].address = F020_SFR_DAC1CN;
539 rmw[0].and_mask = 0xff;
540 rmw[0].or_value = F020_MASK_DACxCN_DACxEN;
542 /* 2 load low byte of DAC value first */
543 rmw[1].address = F020_SFR_DAC1L;
544 rmw[1].and_mask = 0xff;
545 rmw[1].or_value = value & 0xff;
547 /* 3 load high byte of DAC value next to latch the
549 rmw[2].address = F020_SFR_DAC1H;
550 rmw[2].and_mask = 0xff;
551 rmw[2].or_value = (value >> 8) & 0xf;
554 ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
555 devpriv->ao_shadow[channel] = value;
562 static int dt9812_di_insn_bits(struct comedi_device *dev,
563 struct comedi_subdevice *s,
564 struct comedi_insn *insn,
570 ret = dt9812_digital_in(dev, &bits);
579 static int dt9812_do_insn_bits(struct comedi_device *dev,
580 struct comedi_subdevice *s,
581 struct comedi_insn *insn,
584 unsigned int mask = data[0];
585 unsigned int bits = data[1];
589 s->state |= (bits & mask);
591 dt9812_digital_out(dev, s->state);
599 static int dt9812_ai_insn_read(struct comedi_device *dev,
600 struct comedi_subdevice *s,
601 struct comedi_insn *insn,
604 unsigned int chan = CR_CHAN(insn->chanspec);
609 for (i = 0; i < insn->n; i++) {
610 ret = dt9812_analog_in(dev, chan, &val, DT9812_GAIN_1);
619 static int dt9812_ao_insn_read(struct comedi_device *dev,
620 struct comedi_subdevice *s,
621 struct comedi_insn *insn,
624 struct dt9812_private *devpriv = dev->private;
625 unsigned int chan = CR_CHAN(insn->chanspec);
629 for (i = 0; i < insn->n; i++)
630 data[i] = devpriv->ao_shadow[chan];
636 static int dt9812_ao_insn_write(struct comedi_device *dev,
637 struct comedi_subdevice *s,
638 struct comedi_insn *insn,
641 unsigned int chan = CR_CHAN(insn->chanspec);
645 for (i = 0; i < insn->n; i++) {
646 ret = dt9812_analog_out(dev, chan, data[i]);
654 static int dt9812_find_endpoints(struct comedi_device *dev)
656 struct usb_interface *intf = comedi_to_usb_interface(dev);
657 struct usb_host_interface *host = intf->cur_altsetting;
658 struct dt9812_private *devpriv = dev->private;
659 struct usb_endpoint_descriptor *ep;
662 if (host->desc.bNumEndpoints != 5) {
663 dev_err(dev->class_dev, "Wrong number of endpoints\n");
667 for (i = 0; i < host->desc.bNumEndpoints; ++i) {
669 ep = &host->endpoint[i].desc;
672 /* unused message pipe */
677 devpriv->cmd_wr.addr = ep->bEndpointAddress;
678 devpriv->cmd_wr.size = le16_to_cpu(ep->wMaxPacketSize);
682 devpriv->cmd_rd.addr = ep->bEndpointAddress;
683 devpriv->cmd_rd.size = le16_to_cpu(ep->wMaxPacketSize);
686 /* unused write stream */
690 /* unused read stream */
694 if ((ep->bEndpointAddress & USB_DIR_IN) != dir) {
695 dev_err(dev->class_dev,
696 "Endpoint has wrong direction\n");
703 static int dt9812_reset_device(struct comedi_device *dev)
705 struct usb_device *usb = comedi_to_usb_dev(dev);
706 struct dt9812_private *devpriv = dev->private;
716 ret = dt9812_read_info(dev, 0, &tmp8, sizeof(tmp8));
719 * Seems like a configuration reset is necessary if driver is
720 * reloaded while device is attached
722 usb_reset_configuration(usb);
723 for (i = 0; i < 10; i++) {
724 ret = dt9812_read_info(dev, 1, &tmp8, sizeof(tmp8));
729 dev_err(dev->class_dev,
730 "unable to reset configuration\n");
735 ret = dt9812_read_info(dev, 1, &tmp16, sizeof(tmp16));
737 dev_err(dev->class_dev, "failed to read vendor id\n");
740 vendor = le16_to_cpu(tmp16);
742 ret = dt9812_read_info(dev, 3, &tmp16, sizeof(tmp16));
744 dev_err(dev->class_dev, "failed to read product id\n");
747 product = le16_to_cpu(tmp16);
749 ret = dt9812_read_info(dev, 5, &tmp16, sizeof(tmp16));
751 dev_err(dev->class_dev, "failed to read device id\n");
754 devpriv->device = le16_to_cpu(tmp16);
756 ret = dt9812_read_info(dev, 7, &tmp32, sizeof(tmp32));
758 dev_err(dev->class_dev, "failed to read serial number\n");
761 serial = le32_to_cpu(tmp32);
763 /* let the user know what node this device is now attached to */
764 dev_info(dev->class_dev, "USB DT9812 (%4.4x.%4.4x.%4.4x) #0x%8.8x\n",
765 vendor, product, devpriv->device, serial);
767 if (devpriv->device != DT9812_DEVID_DT9812_10 &&
768 devpriv->device != DT9812_DEVID_DT9812_2PT5) {
769 dev_err(dev->class_dev, "Unsupported device!\n");
776 static int dt9812_auto_attach(struct comedi_device *dev,
777 unsigned long context)
779 struct usb_interface *intf = comedi_to_usb_interface(dev);
780 struct dt9812_private *devpriv;
781 struct comedi_subdevice *s;
785 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
789 sema_init(&devpriv->sem, 1);
790 usb_set_intfdata(intf, devpriv);
792 ret = dt9812_find_endpoints(dev);
796 ret = dt9812_reset_device(dev);
800 is_unipolar = (devpriv->device == DT9812_DEVID_DT9812_2PT5);
802 ret = comedi_alloc_subdevices(dev, 4);
806 /* Digital Input subdevice */
807 s = &dev->subdevices[0];
808 s->type = COMEDI_SUBD_DI;
809 s->subdev_flags = SDF_READABLE;
812 s->range_table = &range_digital;
813 s->insn_bits = dt9812_di_insn_bits;
815 /* Digital Output subdevice */
816 s = &dev->subdevices[1];
817 s->type = COMEDI_SUBD_DO;
818 s->subdev_flags = SDF_WRITEABLE;
821 s->range_table = &range_digital;
822 s->insn_bits = dt9812_do_insn_bits;
824 /* Analog Input subdevice */
825 s = &dev->subdevices[2];
826 s->type = COMEDI_SUBD_AI;
827 s->subdev_flags = SDF_READABLE | SDF_GROUND;
830 s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
831 s->insn_read = dt9812_ai_insn_read;
833 /* Analog Output subdevice */
834 s = &dev->subdevices[3];
835 s->type = COMEDI_SUBD_AO;
836 s->subdev_flags = SDF_WRITEABLE;
839 s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
840 s->insn_write = dt9812_ao_insn_write;
841 s->insn_read = dt9812_ao_insn_read;
843 devpriv->ao_shadow[0] = is_unipolar ? 0x0000 : 0x0800;
844 devpriv->ao_shadow[1] = is_unipolar ? 0x0000 : 0x0800;
849 static void dt9812_detach(struct comedi_device *dev)
851 struct usb_interface *intf = comedi_to_usb_interface(dev);
852 struct dt9812_private *devpriv = dev->private;
859 usb_set_intfdata(intf, NULL);
864 static struct comedi_driver dt9812_driver = {
865 .driver_name = "dt9812",
866 .module = THIS_MODULE,
867 .auto_attach = dt9812_auto_attach,
868 .detach = dt9812_detach,
871 static int dt9812_usb_probe(struct usb_interface *intf,
872 const struct usb_device_id *id)
874 return comedi_usb_auto_config(intf, &dt9812_driver, id->driver_info);
877 static const struct usb_device_id dt9812_usb_table[] = {
878 { USB_DEVICE(0x0867, 0x9812) },
881 MODULE_DEVICE_TABLE(usb, dt9812_usb_table);
883 static struct usb_driver dt9812_usb_driver = {
885 .id_table = dt9812_usb_table,
886 .probe = dt9812_usb_probe,
887 .disconnect = comedi_usb_auto_unconfig,
889 module_comedi_usb_driver(dt9812_driver, dt9812_usb_driver);
891 MODULE_AUTHOR("Anders Blomdell <anders.blomdell@control.lth.se>");
892 MODULE_DESCRIPTION("Comedi DT9812 driver");
893 MODULE_LICENSE("GPL");