1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * fl512.c 4 * Anders Gnistrup <ex18@kalman.iau.dtu.dk> 5 * 6 * COMEDI - Linux Control and Measurement Device Interface 7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org> 8 */ 9 10 /* 11 * Driver: fl512 12 * Description: unknown 13 * Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk> 14 * Devices: [unknown] FL512 (fl512) 15 * Status: unknown 16 * 17 * Digital I/O is not supported. 18 * 19 * Configuration options: 20 * [0] - I/O port base address 21 */ 22 23 #include <linux/module.h> 24 #include "../comedidev.h" 25 26 #include <linux/delay.h> 27 28 /* 29 * Register I/O map 30 */ 31 #define FL512_AI_LSB_REG 0x02 32 #define FL512_AI_MSB_REG 0x03 33 #define FL512_AI_MUX_REG 0x02 34 #define FL512_AI_START_CONV_REG 0x03 35 #define FL512_AO_DATA_REG(x) (0x04 + ((x) * 2)) 36 #define FL512_AO_TRIG_REG(x) (0x04 + ((x) * 2)) 37 38 static const struct comedi_lrange range_fl512 = { 39 4, { 40 BIP_RANGE(0.5), 41 BIP_RANGE(1), 42 BIP_RANGE(5), 43 BIP_RANGE(10), 44 UNI_RANGE(1), 45 UNI_RANGE(5), 46 UNI_RANGE(10) 47 } 48 }; 49 50 static int fl512_ai_insn_read(struct comedi_device *dev, 51 struct comedi_subdevice *s, 52 struct comedi_insn *insn, 53 unsigned int *data) 54 { 55 unsigned int chan = CR_CHAN(insn->chanspec); 56 unsigned int val; 57 int i; 58 59 outb(chan, dev->iobase + FL512_AI_MUX_REG); 60 61 for (i = 0; i < insn->n; i++) { 62 outb(0, dev->iobase + FL512_AI_START_CONV_REG); 63 64 /* XXX should test "done" flag instead of delay */ 65 usleep_range(30, 100); 66 67 val = inb(dev->iobase + FL512_AI_LSB_REG); 68 val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8); 69 val &= s->maxdata; 70 71 data[i] = val; 72 } 73 74 return insn->n; 75 } 76 77 static int fl512_ao_insn_write(struct comedi_device *dev, 78 struct comedi_subdevice *s, 79 struct comedi_insn *insn, 80 unsigned int *data) 81 { 82 unsigned int chan = CR_CHAN(insn->chanspec); 83 unsigned int val = s->readback[chan]; 84 int i; 85 86 for (i = 0; i < insn->n; i++) { 87 val = data[i]; 88 89 /* write LSB, MSB then trigger conversion */ 90 outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan)); 91 outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan)); 92 inb(dev->iobase + FL512_AO_TRIG_REG(chan)); 93 } 94 s->readback[chan] = val; 95 96 return insn->n; 97 } 98 99 static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it) 100 { 101 struct comedi_subdevice *s; 102 int ret; 103 104 ret = comedi_request_region(dev, it->options[0], 0x10); 105 if (ret) 106 return ret; 107 108 ret = comedi_alloc_subdevices(dev, 2); 109 if (ret) 110 return ret; 111 112 /* Analog Input subdevice */ 113 s = &dev->subdevices[0]; 114 s->type = COMEDI_SUBD_AI; 115 s->subdev_flags = SDF_READABLE | SDF_GROUND; 116 s->n_chan = 16; 117 s->maxdata = 0x0fff; 118 s->range_table = &range_fl512; 119 s->insn_read = fl512_ai_insn_read; 120 121 /* Analog Output subdevice */ 122 s = &dev->subdevices[1]; 123 s->type = COMEDI_SUBD_AO; 124 s->subdev_flags = SDF_WRITABLE; 125 s->n_chan = 2; 126 s->maxdata = 0x0fff; 127 s->range_table = &range_fl512; 128 s->insn_write = fl512_ao_insn_write; 129 130 return comedi_alloc_subdev_readback(s); 131 } 132 133 static struct comedi_driver fl512_driver = { 134 .driver_name = "fl512", 135 .module = THIS_MODULE, 136 .attach = fl512_attach, 137 .detach = comedi_legacy_detach, 138 }; 139 module_comedi_driver(fl512_driver); 140 141 MODULE_AUTHOR("Comedi https://www.comedi.org"); 142 MODULE_DESCRIPTION("Comedi low-level driver"); 143 MODULE_LICENSE("GPL"); 144