2 * comedi/drivers/mf6x4.c
3 * Driver for Humusoft MF634 and MF624 Data acquisition cards
5 * COMEDI - Linux Control and Measurement Device Interface
6 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
20 * Description: Humusoft MF634 and MF624 Data acquisition card driver
21 * Devices: Humusoft MF634, Humusoft MF624
22 * Author: Rostislav Lisovy <lisovy@gmail.com>
25 * Configuration Options: none
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/delay.h>
31 #include "../comedidev.h"
33 /* Registers present in BAR0 memory region */
34 #define MF624_GPIOC_R 0x54
36 #define MF6X4_GPIOC_EOLC /* End Of Last Conversion */ (1 << 17)
37 #define MF6X4_GPIOC_LDAC /* Load DACs */ (1 << 23)
38 #define MF6X4_GPIOC_DACEN (1 << 26)
41 #define MF6X4_DIN_R 0x10
42 #define MF6X4_DIN_M 0xff
43 #define MF6X4_DOUT_R 0x10
44 #define MF6X4_DOUT_M 0xff
46 #define MF6X4_ADSTART_R 0x20
47 #define MF6X4_ADDATA_R 0x00
48 #define MF6X4_ADCTRL_R 0x00
49 #define MF6X4_ADCTRL_M 0xff
51 #define MF6X4_DA0_R 0x20
52 #define MF6X4_DA1_R 0x22
53 #define MF6X4_DA2_R 0x24
54 #define MF6X4_DA3_R 0x26
55 #define MF6X4_DA4_R 0x28
56 #define MF6X4_DA5_R 0x2a
57 #define MF6X4_DA6_R 0x2c
58 #define MF6X4_DA7_R 0x2e
59 /* Map DAC cahnnel id to real HW-dependent offset value */
60 #define MF6X4_DAC_R(x) (0x20 + ((x) * 2))
61 #define MF6X4_DA_M 0x3fff
64 #define MF634_GPIOC_R 0x68
73 unsigned int bar_nums[3]; /* We need to keep track of the
74 order of BARs used by the cards */
77 static const struct mf6x4_board mf6x4_boards[] = {
80 .bar_nums = {0, 2, 3},
84 .bar_nums = {0, 2, 4},
88 struct mf6x4_private {
90 * Documentation for both MF634 and MF624 describes registers
91 * present in BAR0, 1 and 2 regions.
92 * The real (i.e. in HW) BAR numbers are different for MF624
93 * and MF634 yet we will call them 0, 1, 2
95 void __iomem *bar0_mem;
96 void __iomem *bar2_mem;
99 * This configuration register has the same function and fields
100 * for both cards however it lies in different BARs on different
101 * offsets -- this variable makes the access easier
103 void __iomem *gpioc_R;
105 /* DAC value cache -- used for insn_read function */
109 static int mf6x4_di_insn_bits(struct comedi_device *dev,
110 struct comedi_subdevice *s,
111 struct comedi_insn *insn,
114 data[1] = ioread16(dev->mmio + MF6X4_DIN_R) & MF6X4_DIN_M;
119 static int mf6x4_do_insn_bits(struct comedi_device *dev,
120 struct comedi_subdevice *s,
121 struct comedi_insn *insn,
124 if (comedi_dio_update_state(s, data))
125 iowrite16(s->state & MF6X4_DOUT_M, dev->mmio + MF6X4_DOUT_R);
132 static int mf6x4_ai_eoc(struct comedi_device *dev,
133 struct comedi_subdevice *s,
134 struct comedi_insn *insn,
135 unsigned long context)
137 struct mf6x4_private *devpriv = dev->private;
140 status = ioread32(devpriv->gpioc_R);
141 if (status & MF6X4_GPIOC_EOLC)
146 static int mf6x4_ai_insn_read(struct comedi_device *dev,
147 struct comedi_subdevice *s,
148 struct comedi_insn *insn,
151 int chan = CR_CHAN(insn->chanspec);
156 /* Set the ADC channel number in the scan list */
157 iowrite16((1 << chan) & MF6X4_ADCTRL_M, dev->mmio + MF6X4_ADCTRL_R);
159 for (i = 0; i < insn->n; i++) {
160 /* Trigger ADC conversion by reading ADSTART */
161 ioread16(dev->mmio + MF6X4_ADSTART_R);
163 ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
167 /* Read the actual value */
168 d = ioread16(dev->mmio + MF6X4_ADDATA_R);
173 iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_R);
178 static int mf6x4_ao_insn_write(struct comedi_device *dev,
179 struct comedi_subdevice *s,
180 struct comedi_insn *insn,
183 struct mf6x4_private *devpriv = dev->private;
184 unsigned int chan = CR_CHAN(insn->chanspec);
188 /* Enable instantaneous update of converters outputs + Enable DACs */
189 gpioc = ioread32(devpriv->gpioc_R);
190 iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
193 for (i = 0; i < insn->n; i++) {
194 iowrite16(data[i] & MF6X4_DA_M, dev->mmio + MF6X4_DAC_R(chan));
196 devpriv->ao_readback[chan] = data[i];
202 static int mf6x4_ao_insn_read(struct comedi_device *dev,
203 struct comedi_subdevice *s,
204 struct comedi_insn *insn, unsigned int *data)
206 struct mf6x4_private *devpriv = dev->private;
207 unsigned int chan = CR_CHAN(insn->chanspec);
210 for (i = 0; i < insn->n; i++)
211 data[i] = devpriv->ao_readback[chan];
216 static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
218 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
219 const struct mf6x4_board *board = NULL;
220 struct mf6x4_private *devpriv;
221 struct comedi_subdevice *s;
224 if (context < ARRAY_SIZE(mf6x4_boards))
225 board = &mf6x4_boards[context];
229 dev->board_ptr = board;
230 dev->board_name = board->name;
232 ret = comedi_pci_enable(dev);
236 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
240 devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
241 if (!devpriv->bar0_mem)
244 dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
248 devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
249 if (!devpriv->bar2_mem)
252 if (board == &mf6x4_boards[BOARD_MF634])
253 devpriv->gpioc_R = devpriv->bar2_mem + MF634_GPIOC_R;
255 devpriv->gpioc_R = devpriv->bar0_mem + MF624_GPIOC_R;
258 ret = comedi_alloc_subdevices(dev, 4);
263 s = &dev->subdevices[0];
264 s->type = COMEDI_SUBD_AI;
265 s->subdev_flags = SDF_READABLE | SDF_GROUND;
267 s->maxdata = 0x3fff; /* 14 bits ADC */
268 s->range_table = &range_bipolar10;
269 s->insn_read = mf6x4_ai_insn_read;
272 s = &dev->subdevices[1];
273 s->type = COMEDI_SUBD_AO;
274 s->subdev_flags = SDF_WRITABLE;
276 s->maxdata = 0x3fff; /* 14 bits DAC */
277 s->range_table = &range_bipolar10;
278 s->insn_write = mf6x4_ao_insn_write;
279 s->insn_read = mf6x4_ao_insn_read;
282 s = &dev->subdevices[2];
283 s->type = COMEDI_SUBD_DI;
284 s->subdev_flags = SDF_READABLE;
287 s->range_table = &range_digital;
288 s->insn_bits = mf6x4_di_insn_bits;
291 s = &dev->subdevices[3];
292 s->type = COMEDI_SUBD_DO;
293 s->subdev_flags = SDF_WRITABLE;
296 s->range_table = &range_digital;
297 s->insn_bits = mf6x4_do_insn_bits;
302 static void mf6x4_detach(struct comedi_device *dev)
304 struct mf6x4_private *devpriv = dev->private;
306 if (devpriv->bar0_mem)
307 iounmap(devpriv->bar0_mem);
310 if (devpriv->bar2_mem)
311 iounmap(devpriv->bar2_mem);
313 comedi_pci_disable(dev);
316 static struct comedi_driver mf6x4_driver = {
317 .driver_name = "mf6x4",
318 .module = THIS_MODULE,
319 .auto_attach = mf6x4_auto_attach,
320 .detach = mf6x4_detach,
323 static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
325 return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
328 static const struct pci_device_id mf6x4_pci_table[] = {
329 { PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
330 { PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
333 MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
335 static struct pci_driver mf6x4_pci_driver = {
337 .id_table = mf6x4_pci_table,
338 .probe = mf6x4_pci_probe,
339 .remove = comedi_pci_auto_unconfig,
342 module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
344 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
345 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
346 MODULE_LICENSE("GPL");