1 /*
2 * comedi/drivers/mf6x4.c
3 * Driver for Humusoft MF634 and MF624 Data acquisition cards
4 *
5 * COMEDI - Linux Control and Measurement Device Interface
6 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
7 *
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.
12 *
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.
17 */
18 /*
19 * Driver: mf6x4
20 * Description: Humusoft MF634 and MF624 Data acquisition card driver
21 * Devices: [Humusoft] MF634 (mf634), MF624 (mf624)
22 * Author: Rostislav Lisovy <lisovy@gmail.com>
23 * Status: works
24 * Updated:
25 * Configuration Options: none
26 */
27
28 #include <linux/module.h>
29 #include <linux/delay.h>
30
31 #include "../comedi_pci.h"
32
33 /* Registers present in BAR0 memory region */
34 #define MF624_GPIOC_REG 0x54
35
36 #define MF6X4_GPIOC_EOLC BIT(17) /* End Of Last Conversion */
37 #define MF6X4_GPIOC_LDAC BIT(23) /* Load DACs */
38 #define MF6X4_GPIOC_DACEN BIT(26)
39
40 /* BAR1 registers */
41 #define MF6X4_ADDATA_REG 0x00
42 #define MF6X4_ADCTRL_REG 0x00
43 #define MF6X4_ADCTRL_CHAN(x) BIT(chan)
44 #define MF6X4_DIN_REG 0x10
45 #define MF6X4_DIN_MASK 0xff
46 #define MF6X4_DOUT_REG 0x10
47 #define MF6X4_ADSTART_REG 0x20
48 #define MF6X4_DAC_REG(x) (0x20 + ((x) * 2))
49
50 /* BAR2 registers */
51 #define MF634_GPIOC_REG 0x68
52
53 enum mf6x4_boardid {
54 BOARD_MF634,
55 BOARD_MF624,
56 };
57
58 struct mf6x4_board {
59 const char *name;
60 /* We need to keep track of the order of BARs used by the cards */
61 unsigned int bar_nums[3];
62 };
63
64 static const struct mf6x4_board mf6x4_boards[] = {
65 [BOARD_MF634] = {
66 .name = "mf634",
67 .bar_nums = {0, 2, 3},
68 },
69 [BOARD_MF624] = {
70 .name = "mf624",
71 .bar_nums = {0, 2, 4},
72 },
73 };
74
75 struct mf6x4_private {
76 /*
77 * Documentation for both MF634 and MF624 describes registers
78 * present in BAR0, 1 and 2 regions.
79 * The real (i.e. in HW) BAR numbers are different for MF624
80 * and MF634 yet we will call them 0, 1, 2
81 */
82 void __iomem *bar0_mem;
83 void __iomem *bar2_mem;
84
85 /*
86 * This configuration register has the same function and fields
87 * for both cards however it lies in different BARs on different
88 * offsets -- this variable makes the access easier
89 */
90 void __iomem *gpioc_reg;
91 };
92
mf6x4_di_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)93 static int mf6x4_di_insn_bits(struct comedi_device *dev,
94 struct comedi_subdevice *s,
95 struct comedi_insn *insn,
96 unsigned int *data)
97 {
98 data[1] = ioread16(dev->mmio + MF6X4_DIN_REG) & MF6X4_DIN_MASK;
99
100 return insn->n;
101 }
102
mf6x4_do_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)103 static int mf6x4_do_insn_bits(struct comedi_device *dev,
104 struct comedi_subdevice *s,
105 struct comedi_insn *insn,
106 unsigned int *data)
107 {
108 if (comedi_dio_update_state(s, data))
109 iowrite16(s->state, dev->mmio + MF6X4_DOUT_REG);
110
111 data[1] = s->state;
112
113 return insn->n;
114 }
115
mf6x4_ai_eoc(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned long context)116 static int mf6x4_ai_eoc(struct comedi_device *dev,
117 struct comedi_subdevice *s,
118 struct comedi_insn *insn,
119 unsigned long context)
120 {
121 struct mf6x4_private *devpriv = dev->private;
122 unsigned int status;
123
124 status = ioread32(devpriv->gpioc_reg);
125 if (status & MF6X4_GPIOC_EOLC)
126 return 0;
127 return -EBUSY;
128 }
129
mf6x4_ai_insn_read(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)130 static int mf6x4_ai_insn_read(struct comedi_device *dev,
131 struct comedi_subdevice *s,
132 struct comedi_insn *insn,
133 unsigned int *data)
134 {
135 unsigned int chan = CR_CHAN(insn->chanspec);
136 unsigned int d;
137 int ret;
138 int i;
139
140 /* Set the ADC channel number in the scan list */
141 iowrite16(MF6X4_ADCTRL_CHAN(chan), dev->mmio + MF6X4_ADCTRL_REG);
142
143 for (i = 0; i < insn->n; i++) {
144 /* Trigger ADC conversion by reading ADSTART */
145 ioread16(dev->mmio + MF6X4_ADSTART_REG);
146
147 ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
148 if (ret)
149 return ret;
150
151 /* Read the actual value */
152 d = ioread16(dev->mmio + MF6X4_ADDATA_REG);
153 d &= s->maxdata;
154 /* munge the 2's complement data to offset binary */
155 data[i] = comedi_offset_munge(s, d);
156 }
157
158 iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_REG);
159
160 return insn->n;
161 }
162
mf6x4_ao_insn_write(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)163 static int mf6x4_ao_insn_write(struct comedi_device *dev,
164 struct comedi_subdevice *s,
165 struct comedi_insn *insn,
166 unsigned int *data)
167 {
168 struct mf6x4_private *devpriv = dev->private;
169 unsigned int chan = CR_CHAN(insn->chanspec);
170 unsigned int val = s->readback[chan];
171 unsigned int gpioc;
172 int i;
173
174 /* Enable instantaneous update of converters outputs + Enable DACs */
175 gpioc = ioread32(devpriv->gpioc_reg);
176 iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
177 devpriv->gpioc_reg);
178
179 for (i = 0; i < insn->n; i++) {
180 val = data[i];
181 iowrite16(val, dev->mmio + MF6X4_DAC_REG(chan));
182 }
183 s->readback[chan] = val;
184
185 return insn->n;
186 }
187
mf6x4_auto_attach(struct comedi_device * dev,unsigned long context)188 static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
189 {
190 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
191 const struct mf6x4_board *board = NULL;
192 struct mf6x4_private *devpriv;
193 struct comedi_subdevice *s;
194 int ret;
195
196 if (context < ARRAY_SIZE(mf6x4_boards))
197 board = &mf6x4_boards[context];
198 else
199 return -ENODEV;
200
201 dev->board_ptr = board;
202 dev->board_name = board->name;
203
204 ret = comedi_pci_enable(dev);
205 if (ret)
206 return ret;
207
208 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
209 if (!devpriv)
210 return -ENOMEM;
211
212 devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
213 if (!devpriv->bar0_mem)
214 return -ENODEV;
215
216 dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
217 if (!dev->mmio)
218 return -ENODEV;
219
220 devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
221 if (!devpriv->bar2_mem)
222 return -ENODEV;
223
224 if (board == &mf6x4_boards[BOARD_MF634])
225 devpriv->gpioc_reg = devpriv->bar2_mem + MF634_GPIOC_REG;
226 else
227 devpriv->gpioc_reg = devpriv->bar0_mem + MF624_GPIOC_REG;
228
229 ret = comedi_alloc_subdevices(dev, 4);
230 if (ret)
231 return ret;
232
233 /* Analog Input subdevice */
234 s = &dev->subdevices[0];
235 s->type = COMEDI_SUBD_AI;
236 s->subdev_flags = SDF_READABLE | SDF_GROUND;
237 s->n_chan = 8;
238 s->maxdata = 0x3fff;
239 s->range_table = &range_bipolar10;
240 s->insn_read = mf6x4_ai_insn_read;
241
242 /* Analog Output subdevice */
243 s = &dev->subdevices[1];
244 s->type = COMEDI_SUBD_AO;
245 s->subdev_flags = SDF_WRITABLE;
246 s->n_chan = 8;
247 s->maxdata = 0x3fff;
248 s->range_table = &range_bipolar10;
249 s->insn_write = mf6x4_ao_insn_write;
250
251 ret = comedi_alloc_subdev_readback(s);
252 if (ret)
253 return ret;
254
255 /* Digital Input subdevice */
256 s = &dev->subdevices[2];
257 s->type = COMEDI_SUBD_DI;
258 s->subdev_flags = SDF_READABLE;
259 s->n_chan = 8;
260 s->maxdata = 1;
261 s->range_table = &range_digital;
262 s->insn_bits = mf6x4_di_insn_bits;
263
264 /* Digital Output subdevice */
265 s = &dev->subdevices[3];
266 s->type = COMEDI_SUBD_DO;
267 s->subdev_flags = SDF_WRITABLE;
268 s->n_chan = 8;
269 s->maxdata = 1;
270 s->range_table = &range_digital;
271 s->insn_bits = mf6x4_do_insn_bits;
272
273 return 0;
274 }
275
mf6x4_detach(struct comedi_device * dev)276 static void mf6x4_detach(struct comedi_device *dev)
277 {
278 struct mf6x4_private *devpriv = dev->private;
279
280 if (devpriv) {
281 if (devpriv->bar0_mem)
282 iounmap(devpriv->bar0_mem);
283 if (devpriv->bar2_mem)
284 iounmap(devpriv->bar2_mem);
285 }
286 comedi_pci_detach(dev);
287 }
288
289 static struct comedi_driver mf6x4_driver = {
290 .driver_name = "mf6x4",
291 .module = THIS_MODULE,
292 .auto_attach = mf6x4_auto_attach,
293 .detach = mf6x4_detach,
294 };
295
mf6x4_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)296 static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
297 {
298 return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
299 }
300
301 static const struct pci_device_id mf6x4_pci_table[] = {
302 { PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
303 { PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
304 { 0 }
305 };
306 MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
307
308 static struct pci_driver mf6x4_pci_driver = {
309 .name = "mf6x4",
310 .id_table = mf6x4_pci_table,
311 .probe = mf6x4_pci_probe,
312 .remove = comedi_pci_auto_unconfig,
313 };
314
315 module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
316
317 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
318 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
319 MODULE_LICENSE("GPL");
320