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Linux/drivers/staging/comedi/drivers/ni_daq_700.c

  1 /*
  2  *     comedi/drivers/ni_daq_700.c
  3  *     Driver for DAQCard-700 DIO/AI
  4  *     copied from 8255
  5  *
  6  *     COMEDI - Linux Control and Measurement Device Interface
  7  *     Copyright (C) 1998 David A. Schleef <ds@schleef.org>
  8  *
  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.
 13  *
 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.
 18  */
 19 
 20 /*
 21  * Driver: ni_daq_700
 22  * Description: National Instruments PCMCIA DAQCard-700
 23  * Author: Fred Brooks <nsaspook@nsaspook.com>,
 24  *   based on ni_daq_dio24 by Daniel Vecino Castel <dvecino@able.es>
 25  * Devices: [National Instruments] PCMCIA DAQ-Card-700 (ni_daq_700)
 26  * Status: works
 27  * Updated: Wed, 21 May 2014 12:07:20 +0000
 28  *
 29  * The daqcard-700 appears in Comedi as a  digital I/O subdevice (0) with
 30  * 16 channels and a analog input subdevice (1) with 16 single-ended channels
 31  * or 8 differential channels, and three input ranges.
 32  *
 33  * Digital:  The channel 0 corresponds to the daqcard-700's output
 34  * port, bit 0; channel 8 corresponds to the input port, bit 0.
 35  *
 36  * Digital direction configuration: channels 0-7 output, 8-15 input.
 37  *
 38  * Analog: The input  range is 0 to 4095 with a default of -10 to +10 volts.
 39  * Valid ranges:
 40  *       0 for -10 to 10V bipolar
 41  *       1 for -5 to 5V bipolar
 42  *       2 for -2.5 to 2.5V bipolar
 43  *
 44  * IRQ is assigned but not used.
 45  *
 46  * Manuals:     Register level: http://www.ni.com/pdf/manuals/340698.pdf
 47  *              User Manual:    http://www.ni.com/pdf/manuals/320676d.pdf
 48  */
 49 
 50 #include <linux/module.h>
 51 #include <linux/delay.h>
 52 #include <linux/interrupt.h>
 53 
 54 #include "../comedi_pcmcia.h"
 55 
 56 /* daqcard700 registers */
 57 #define DIO_W           0x04    /* WO 8bit */
 58 #define DIO_R           0x05    /* RO 8bit */
 59 #define CMD_R1          0x00    /* WO 8bit */
 60 #define CMD_R2          0x07    /* RW 8bit */
 61 #define CMD_R3          0x05    /* W0 8bit */
 62 #define STA_R1          0x00    /* RO 8bit */
 63 #define STA_R2          0x01    /* RO 8bit */
 64 #define ADFIFO_R        0x02    /* RO 16bit */
 65 #define ADCLEAR_R       0x01    /* WO 8bit */
 66 #define CDA_R0          0x08    /* RW 8bit */
 67 #define CDA_R1          0x09    /* RW 8bit */
 68 #define CDA_R2          0x0A    /* RW 8bit */
 69 #define CMO_R           0x0B    /* RO 8bit */
 70 #define TIC_R           0x06    /* WO 8bit */
 71 /* daqcard700 modes */
 72 #define CMD_R3_DIFF     0x04    /* diff mode */
 73 
 74 static const struct comedi_lrange range_daq700_ai = {
 75         3,
 76         {
 77                 BIP_RANGE(10),
 78                 BIP_RANGE(5),
 79                 BIP_RANGE(2.5)
 80         }
 81 };
 82 
 83 static int daq700_dio_insn_bits(struct comedi_device *dev,
 84                                 struct comedi_subdevice *s,
 85                                 struct comedi_insn *insn,
 86                                 unsigned int *data)
 87 {
 88         unsigned int mask;
 89         unsigned int val;
 90 
 91         mask = comedi_dio_update_state(s, data);
 92         if (mask) {
 93                 if (mask & 0xff)
 94                         outb(s->state & 0xff, dev->iobase + DIO_W);
 95         }
 96 
 97         val = s->state & 0xff;
 98         val |= inb(dev->iobase + DIO_R) << 8;
 99 
100         data[1] = val;
101 
102         return insn->n;
103 }
104 
105 static int daq700_dio_insn_config(struct comedi_device *dev,
106                                   struct comedi_subdevice *s,
107                                   struct comedi_insn *insn,
108                                   unsigned int *data)
109 {
110         int ret;
111 
112         ret = comedi_dio_insn_config(dev, s, insn, data, 0);
113         if (ret)
114                 return ret;
115 
116         /* The DIO channels are not configurable, fix the io_bits */
117         s->io_bits = 0x00ff;
118 
119         return insn->n;
120 }
121 
122 static int daq700_ai_eoc(struct comedi_device *dev,
123                          struct comedi_subdevice *s,
124                          struct comedi_insn *insn,
125                          unsigned long context)
126 {
127         unsigned int status;
128 
129         status = inb(dev->iobase + STA_R2);
130         if ((status & 0x03))
131                 return -EOVERFLOW;
132         status = inb(dev->iobase + STA_R1);
133         if ((status & 0x02))
134                 return -ENODATA;
135         if ((status & 0x11) == 0x01)
136                 return 0;
137         return -EBUSY;
138 }
139 
140 static int daq700_ai_rinsn(struct comedi_device *dev,
141                            struct comedi_subdevice *s,
142                            struct comedi_insn *insn, unsigned int *data)
143 {
144         int n;
145         int d;
146         int ret;
147         unsigned int chan       = CR_CHAN(insn->chanspec);
148         unsigned int aref       = CR_AREF(insn->chanspec);
149         unsigned int range      = CR_RANGE(insn->chanspec);
150         unsigned int r3_bits    = 0;
151 
152         /* set channel input modes */
153         if (aref == AREF_DIFF)
154                 r3_bits |= CMD_R3_DIFF;
155         /* write channel mode/range */
156         if (range >= 1)
157                 range++;        /* convert range to hardware value */
158         outb(r3_bits | (range & 0x03), dev->iobase + CMD_R3);
159 
160         /* write channel to multiplexer */
161         /* set mask scan bit high to disable scanning */
162         outb(chan | 0x80, dev->iobase + CMD_R1);
163         /* mux needs 2us to really settle [Fred Brooks]. */
164         udelay(2);
165 
166         /* convert n samples */
167         for (n = 0; n < insn->n; n++) {
168                 /* trigger conversion with out0 L to H */
169                 outb(0x00, dev->iobase + CMD_R2); /* enable ADC conversions */
170                 outb(0x30, dev->iobase + CMO_R); /* mode 0 out0 L, from H */
171                 outb(0x00, dev->iobase + ADCLEAR_R);    /* clear the ADC FIFO */
172                 /* read 16bit junk from FIFO to clear */
173                 inw(dev->iobase + ADFIFO_R);
174                 /* mode 1 out0 H, L to H, start conversion */
175                 outb(0x32, dev->iobase + CMO_R);
176 
177                 /* wait for conversion to end */
178                 ret = comedi_timeout(dev, s, insn, daq700_ai_eoc, 0);
179                 if (ret)
180                         return ret;
181 
182                 /* read data */
183                 d = inw(dev->iobase + ADFIFO_R);
184                 /* mangle the data as necessary */
185                 /* Bipolar Offset Binary: 0 to 4095 for -10 to +10 */
186                 d &= 0x0fff;
187                 d ^= 0x0800;
188                 data[n] = d;
189         }
190         return n;
191 }
192 
193 /*
194  * Data acquisition is enabled.
195  * The counter 0 output is high.
196  * The I/O connector pin CLK1 drives counter 1 source.
197  * Multiple-channel scanning is disabled.
198  * All interrupts are disabled.
199  * The analog input range is set to +-10 V
200  * The analog input mode is single-ended.
201  * The analog input circuitry is initialized to channel 0.
202  * The A/D FIFO is cleared.
203  */
204 static void daq700_ai_config(struct comedi_device *dev,
205                              struct comedi_subdevice *s)
206 {
207         unsigned long iobase = dev->iobase;
208 
209         outb(0x80, iobase + CMD_R1);    /* disable scanning, ADC to chan 0 */
210         outb(0x00, iobase + CMD_R2);    /* clear all bits */
211         outb(0x00, iobase + CMD_R3);    /* set +-10 range */
212         outb(0x32, iobase + CMO_R);     /* config counter mode1, out0 to H */
213         outb(0x00, iobase + TIC_R);     /* clear counter interrupt */
214         outb(0x00, iobase + ADCLEAR_R); /* clear the ADC FIFO */
215         inw(iobase + ADFIFO_R);         /* read 16bit junk from FIFO to clear */
216 }
217 
218 static int daq700_auto_attach(struct comedi_device *dev,
219                               unsigned long context)
220 {
221         struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
222         struct comedi_subdevice *s;
223         int ret;
224 
225         link->config_flags |= CONF_AUTO_SET_IO;
226         ret = comedi_pcmcia_enable(dev, NULL);
227         if (ret)
228                 return ret;
229         dev->iobase = link->resource[0]->start;
230 
231         ret = comedi_alloc_subdevices(dev, 2);
232         if (ret)
233                 return ret;
234 
235         /* DAQCard-700 dio */
236         s = &dev->subdevices[0];
237         s->type         = COMEDI_SUBD_DIO;
238         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
239         s->n_chan       = 16;
240         s->range_table  = &range_digital;
241         s->maxdata      = 1;
242         s->insn_bits    = daq700_dio_insn_bits;
243         s->insn_config  = daq700_dio_insn_config;
244         s->io_bits      = 0x00ff;
245 
246         /* DAQCard-700 ai */
247         s = &dev->subdevices[1];
248         s->type = COMEDI_SUBD_AI;
249         s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
250         s->n_chan = 16;
251         s->maxdata = (1 << 12) - 1;
252         s->range_table = &range_daq700_ai;
253         s->insn_read = daq700_ai_rinsn;
254         daq700_ai_config(dev, s);
255 
256         return 0;
257 }
258 
259 static struct comedi_driver daq700_driver = {
260         .driver_name    = "ni_daq_700",
261         .module         = THIS_MODULE,
262         .auto_attach    = daq700_auto_attach,
263         .detach         = comedi_pcmcia_disable,
264 };
265 
266 static int daq700_cs_attach(struct pcmcia_device *link)
267 {
268         return comedi_pcmcia_auto_config(link, &daq700_driver);
269 }
270 
271 static const struct pcmcia_device_id daq700_cs_ids[] = {
272         PCMCIA_DEVICE_MANF_CARD(0x010b, 0x4743),
273         PCMCIA_DEVICE_NULL
274 };
275 MODULE_DEVICE_TABLE(pcmcia, daq700_cs_ids);
276 
277 static struct pcmcia_driver daq700_cs_driver = {
278         .name           = "ni_daq_700",
279         .owner          = THIS_MODULE,
280         .id_table       = daq700_cs_ids,
281         .probe          = daq700_cs_attach,
282         .remove         = comedi_pcmcia_auto_unconfig,
283 };
284 module_comedi_pcmcia_driver(daq700_driver, daq700_cs_driver);
285 
286 MODULE_AUTHOR("Fred Brooks <nsaspook@nsaspook.com>");
287 MODULE_DESCRIPTION(
288         "Comedi driver for National Instruments PCMCIA DAQCard-700 DIO/AI");
289 MODULE_LICENSE("GPL");
290 

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