1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * comedi/drivers/ni_daq_700.c 4 * Driver for DAQCard-700 DIO/AI 5 * copied from 8255 6 * 7 * COMEDI - Linux Control and Measurement Device Interface 8 * Copyright (C) 1998 David A. Schleef <ds@schleef.org> 9 */ 10 11 /* 12 * Driver: ni_daq_700 13 * Description: National Instruments PCMCIA DAQCard-700 14 * Author: Fred Brooks <nsaspook@nsaspook.com>, 15 * based on ni_daq_dio24 by Daniel Vecino Castel <dvecino@able.es> 16 * Devices: [National Instruments] PCMCIA DAQ-Card-700 (ni_daq_700) 17 * Status: works 18 * Updated: Wed, 21 May 2014 12:07:20 +0000 19 * 20 * The daqcard-700 appears in Comedi as a digital I/O subdevice (0) with 21 * 16 channels and a analog input subdevice (1) with 16 single-ended channels 22 * or 8 differential channels, and three input ranges. 23 * 24 * Digital: The channel 0 corresponds to the daqcard-700's output 25 * port, bit 0; channel 8 corresponds to the input port, bit 0. 26 * 27 * Digital direction configuration: channels 0-7 output, 8-15 input. 28 * 29 * Analog: The input range is 0 to 4095 with a default of -10 to +10 volts. 30 * Valid ranges: 31 * 0 for -10 to 10V bipolar 32 * 1 for -5 to 5V bipolar 33 * 2 for -2.5 to 2.5V bipolar 34 * 35 * IRQ is assigned but not used. 36 * 37 * Manuals: Register level: https://www.ni.com/pdf/manuals/340698.pdf 38 * User Manual: https://www.ni.com/pdf/manuals/320676d.pdf 39 */ 40 41 #include <linux/module.h> 42 #include <linux/delay.h> 43 #include <linux/interrupt.h> 44 45 #include "../comedi_pcmcia.h" 46 47 /* daqcard700 registers */ 48 #define DIO_W 0x04 /* WO 8bit */ 49 #define DIO_R 0x05 /* RO 8bit */ 50 #define CMD_R1 0x00 /* WO 8bit */ 51 #define CMD_R2 0x07 /* RW 8bit */ 52 #define CMD_R3 0x05 /* W0 8bit */ 53 #define STA_R1 0x00 /* RO 8bit */ 54 #define STA_R2 0x01 /* RO 8bit */ 55 #define ADFIFO_R 0x02 /* RO 16bit */ 56 #define ADCLEAR_R 0x01 /* WO 8bit */ 57 #define CDA_R0 0x08 /* RW 8bit */ 58 #define CDA_R1 0x09 /* RW 8bit */ 59 #define CDA_R2 0x0A /* RW 8bit */ 60 #define CMO_R 0x0B /* RO 8bit */ 61 #define TIC_R 0x06 /* WO 8bit */ 62 /* daqcard700 modes */ 63 #define CMD_R3_DIFF 0x04 /* diff mode */ 64 65 static const struct comedi_lrange range_daq700_ai = { 66 3, 67 { 68 BIP_RANGE(10), 69 BIP_RANGE(5), 70 BIP_RANGE(2.5) 71 } 72 }; 73 74 static int daq700_dio_insn_bits(struct comedi_device *dev, 75 struct comedi_subdevice *s, 76 struct comedi_insn *insn, 77 unsigned int *data) 78 { 79 unsigned int mask; 80 unsigned int val; 81 82 mask = comedi_dio_update_state(s, data); 83 if (mask) { 84 if (mask & 0xff) 85 outb(s->state & 0xff, dev->iobase + DIO_W); 86 } 87 88 val = s->state & 0xff; 89 val |= inb(dev->iobase + DIO_R) << 8; 90 91 data[1] = val; 92 93 return insn->n; 94 } 95 96 static int daq700_dio_insn_config(struct comedi_device *dev, 97 struct comedi_subdevice *s, 98 struct comedi_insn *insn, 99 unsigned int *data) 100 { 101 int ret; 102 103 ret = comedi_dio_insn_config(dev, s, insn, data, 0); 104 if (ret) 105 return ret; 106 107 /* The DIO channels are not configurable, fix the io_bits */ 108 s->io_bits = 0x00ff; 109 110 return insn->n; 111 } 112 113 static int daq700_ai_eoc(struct comedi_device *dev, 114 struct comedi_subdevice *s, 115 struct comedi_insn *insn, 116 unsigned long context) 117 { 118 unsigned int status; 119 120 status = inb(dev->iobase + STA_R2); 121 if ((status & 0x03)) 122 return -EOVERFLOW; 123 status = inb(dev->iobase + STA_R1); 124 if ((status & 0x02)) 125 return -ENODATA; 126 if ((status & 0x11) == 0x01) 127 return 0; 128 return -EBUSY; 129 } 130 131 static int daq700_ai_rinsn(struct comedi_device *dev, 132 struct comedi_subdevice *s, 133 struct comedi_insn *insn, unsigned int *data) 134 { 135 int n; 136 int d; 137 int ret; 138 unsigned int chan = CR_CHAN(insn->chanspec); 139 unsigned int aref = CR_AREF(insn->chanspec); 140 unsigned int range = CR_RANGE(insn->chanspec); 141 unsigned int r3_bits = 0; 142 143 /* set channel input modes */ 144 if (aref == AREF_DIFF) 145 r3_bits |= CMD_R3_DIFF; 146 /* write channel mode/range */ 147 if (range >= 1) 148 range++; /* convert range to hardware value */ 149 outb(r3_bits | (range & 0x03), dev->iobase + CMD_R3); 150 151 /* write channel to multiplexer */ 152 /* set mask scan bit high to disable scanning */ 153 outb(chan | 0x80, dev->iobase + CMD_R1); 154 /* mux needs 2us to really settle [Fred Brooks]. */ 155 udelay(2); 156 157 /* convert n samples */ 158 for (n = 0; n < insn->n; n++) { 159 /* trigger conversion with out0 L to H */ 160 outb(0x00, dev->iobase + CMD_R2); /* enable ADC conversions */ 161 outb(0x30, dev->iobase + CMO_R); /* mode 0 out0 L, from H */ 162 outb(0x00, dev->iobase + ADCLEAR_R); /* clear the ADC FIFO */ 163 /* read 16bit junk from FIFO to clear */ 164 inw(dev->iobase + ADFIFO_R); 165 /* mode 1 out0 H, L to H, start conversion */ 166 outb(0x32, dev->iobase + CMO_R); 167 168 /* wait for conversion to end */ 169 ret = comedi_timeout(dev, s, insn, daq700_ai_eoc, 0); 170 if (ret) 171 return ret; 172 173 /* read data */ 174 d = inw(dev->iobase + ADFIFO_R); 175 /* mangle the data as necessary */ 176 /* Bipolar Offset Binary: 0 to 4095 for -10 to +10 */ 177 d &= 0x0fff; 178 d ^= 0x0800; 179 data[n] = d; 180 } 181 return n; 182 } 183 184 /* 185 * Data acquisition is enabled. 186 * The counter 0 output is high. 187 * The I/O connector pin CLK1 drives counter 1 source. 188 * Multiple-channel scanning is disabled. 189 * All interrupts are disabled. 190 * The analog input range is set to +-10 V 191 * The analog input mode is single-ended. 192 * The analog input circuitry is initialized to channel 0. 193 * The A/D FIFO is cleared. 194 */ 195 static void daq700_ai_config(struct comedi_device *dev, 196 struct comedi_subdevice *s) 197 { 198 unsigned long iobase = dev->iobase; 199 200 outb(0x80, iobase + CMD_R1); /* disable scanning, ADC to chan 0 */ 201 outb(0x00, iobase + CMD_R2); /* clear all bits */ 202 outb(0x00, iobase + CMD_R3); /* set +-10 range */ 203 outb(0x32, iobase + CMO_R); /* config counter mode1, out0 to H */ 204 outb(0x00, iobase + TIC_R); /* clear counter interrupt */ 205 outb(0x00, iobase + ADCLEAR_R); /* clear the ADC FIFO */ 206 inw(iobase + ADFIFO_R); /* read 16bit junk from FIFO to clear */ 207 } 208 209 static int daq700_auto_attach(struct comedi_device *dev, 210 unsigned long context) 211 { 212 struct pcmcia_device *link = comedi_to_pcmcia_dev(dev); 213 struct comedi_subdevice *s; 214 int ret; 215 216 link->config_flags |= CONF_AUTO_SET_IO; 217 ret = comedi_pcmcia_enable(dev, NULL); 218 if (ret) 219 return ret; 220 dev->iobase = link->resource[0]->start; 221 222 ret = comedi_alloc_subdevices(dev, 2); 223 if (ret) 224 return ret; 225 226 /* DAQCard-700 dio */ 227 s = &dev->subdevices[0]; 228 s->type = COMEDI_SUBD_DIO; 229 s->subdev_flags = SDF_READABLE | SDF_WRITABLE; 230 s->n_chan = 16; 231 s->range_table = &range_digital; 232 s->maxdata = 1; 233 s->insn_bits = daq700_dio_insn_bits; 234 s->insn_config = daq700_dio_insn_config; 235 s->io_bits = 0x00ff; 236 237 /* DAQCard-700 ai */ 238 s = &dev->subdevices[1]; 239 s->type = COMEDI_SUBD_AI; 240 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; 241 s->n_chan = 16; 242 s->maxdata = BIT(12) - 1; 243 s->range_table = &range_daq700_ai; 244 s->insn_read = daq700_ai_rinsn; 245 daq700_ai_config(dev, s); 246 247 return 0; 248 } 249 250 static struct comedi_driver daq700_driver = { 251 .driver_name = "ni_daq_700", 252 .module = THIS_MODULE, 253 .auto_attach = daq700_auto_attach, 254 .detach = comedi_pcmcia_disable, 255 }; 256 257 static int daq700_cs_attach(struct pcmcia_device *link) 258 { 259 return comedi_pcmcia_auto_config(link, &daq700_driver); 260 } 261 262 static const struct pcmcia_device_id daq700_cs_ids[] = { 263 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x4743), 264 PCMCIA_DEVICE_NULL 265 }; 266 MODULE_DEVICE_TABLE(pcmcia, daq700_cs_ids); 267 268 static struct pcmcia_driver daq700_cs_driver = { 269 .name = "ni_daq_700", 270 .owner = THIS_MODULE, 271 .id_table = daq700_cs_ids, 272 .probe = daq700_cs_attach, 273 .remove = comedi_pcmcia_auto_unconfig, 274 }; 275 module_comedi_pcmcia_driver(daq700_driver, daq700_cs_driver); 276 277 MODULE_AUTHOR("Fred Brooks <nsaspook@nsaspook.com>"); 278 MODULE_DESCRIPTION( 279 "Comedi driver for National Instruments PCMCIA DAQCard-700 DIO/AI"); 280 MODULE_LICENSE("GPL"); 281