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_R 0x54
35
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)
39
40 /* BAR1 registers */
41 #define MF6X4_DIN_R 0x10
42 #define MF6X4_DIN_M 0xff
43 #define MF6X4_DOUT_R 0x10
44 #define MF6X4_DOUT_M 0xff
45
46 #define MF6X4_ADSTART_R 0x20
47 #define MF6X4_ADDATA_R 0x00
48 #define MF6X4_ADCTRL_R 0x00
49 #define MF6X4_ADCTRL_M 0xff
50
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
62 /* BAR2 registers */
63 #define MF634_GPIOC_R 0x68
64
65 enum mf6x4_boardid {
66 BOARD_MF634,
67 BOARD_MF624,
68 };
69
70 struct mf6x4_board {
71 const char *name;
72 unsigned int bar_nums[3]; /* We need to keep track of the
73 order of BARs used by the cards */
74 };
75
76 static const struct mf6x4_board mf6x4_boards[] = {
77 [BOARD_MF634] = {
78 .name = "mf634",
79 .bar_nums = {0, 2, 3},
80 },
81 [BOARD_MF624] = {
82 .name = "mf624",
83 .bar_nums = {0, 2, 4},
84 },
85 };
86
87 struct mf6x4_private {
88 /*
89 * Documentation for both MF634 and MF624 describes registers
90 * present in BAR0, 1 and 2 regions.
91 * The real (i.e. in HW) BAR numbers are different for MF624
92 * and MF634 yet we will call them 0, 1, 2
93 */
94 void __iomem *bar0_mem;
95 void __iomem *bar2_mem;
96
97 /*
98 * This configuration register has the same function and fields
99 * for both cards however it lies in different BARs on different
100 * offsets -- this variable makes the access easier
101 */
102 void __iomem *gpioc_R;
103 };
104
mf6x4_di_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)105 static int mf6x4_di_insn_bits(struct comedi_device *dev,
106 struct comedi_subdevice *s,
107 struct comedi_insn *insn,
108 unsigned int *data)
109 {
110 data[1] = ioread16(dev->mmio + MF6X4_DIN_R) & MF6X4_DIN_M;
111
112 return insn->n;
113 }
114
mf6x4_do_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)115 static int mf6x4_do_insn_bits(struct comedi_device *dev,
116 struct comedi_subdevice *s,
117 struct comedi_insn *insn,
118 unsigned int *data)
119 {
120 if (comedi_dio_update_state(s, data))
121 iowrite16(s->state & MF6X4_DOUT_M, dev->mmio + MF6X4_DOUT_R);
122
123 data[1] = s->state;
124
125 return insn->n;
126 }
127
mf6x4_ai_eoc(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned long context)128 static int mf6x4_ai_eoc(struct comedi_device *dev,
129 struct comedi_subdevice *s,
130 struct comedi_insn *insn,
131 unsigned long context)
132 {
133 struct mf6x4_private *devpriv = dev->private;
134 unsigned int status;
135
136 status = ioread32(devpriv->gpioc_R);
137 if (status & MF6X4_GPIOC_EOLC)
138 return 0;
139 return -EBUSY;
140 }
141
mf6x4_ai_insn_read(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)142 static int mf6x4_ai_insn_read(struct comedi_device *dev,
143 struct comedi_subdevice *s,
144 struct comedi_insn *insn,
145 unsigned int *data)
146 {
147 int chan = CR_CHAN(insn->chanspec);
148 int ret;
149 int i;
150 int d;
151
152 /* Set the ADC channel number in the scan list */
153 iowrite16((1 << chan) & MF6X4_ADCTRL_M, dev->mmio + MF6X4_ADCTRL_R);
154
155 for (i = 0; i < insn->n; i++) {
156 /* Trigger ADC conversion by reading ADSTART */
157 ioread16(dev->mmio + MF6X4_ADSTART_R);
158
159 ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
160 if (ret)
161 return ret;
162
163 /* Read the actual value */
164 d = ioread16(dev->mmio + MF6X4_ADDATA_R);
165 d &= s->maxdata;
166 data[i] = d;
167 }
168
169 iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_R);
170
171 return insn->n;
172 }
173
mf6x4_ao_insn_write(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)174 static int mf6x4_ao_insn_write(struct comedi_device *dev,
175 struct comedi_subdevice *s,
176 struct comedi_insn *insn,
177 unsigned int *data)
178 {
179 struct mf6x4_private *devpriv = dev->private;
180 unsigned int chan = CR_CHAN(insn->chanspec);
181 unsigned int val = s->readback[chan];
182 uint32_t gpioc;
183 int i;
184
185 /* Enable instantaneous update of converters outputs + Enable DACs */
186 gpioc = ioread32(devpriv->gpioc_R);
187 iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
188 devpriv->gpioc_R);
189
190 for (i = 0; i < insn->n; i++) {
191 val = data[i];
192 iowrite16(val, dev->mmio + MF6X4_DAC_R(chan));
193 }
194 s->readback[chan] = val;
195
196 return insn->n;
197 }
198
mf6x4_auto_attach(struct comedi_device * dev,unsigned long context)199 static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
200 {
201 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
202 const struct mf6x4_board *board = NULL;
203 struct mf6x4_private *devpriv;
204 struct comedi_subdevice *s;
205 int ret;
206
207 if (context < ARRAY_SIZE(mf6x4_boards))
208 board = &mf6x4_boards[context];
209 else
210 return -ENODEV;
211
212 dev->board_ptr = board;
213 dev->board_name = board->name;
214
215 ret = comedi_pci_enable(dev);
216 if (ret)
217 return ret;
218
219 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
220 if (!devpriv)
221 return -ENOMEM;
222
223 devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
224 if (!devpriv->bar0_mem)
225 return -ENODEV;
226
227 dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
228 if (!dev->mmio)
229 return -ENODEV;
230
231 devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
232 if (!devpriv->bar2_mem)
233 return -ENODEV;
234
235 if (board == &mf6x4_boards[BOARD_MF634])
236 devpriv->gpioc_R = devpriv->bar2_mem + MF634_GPIOC_R;
237 else
238 devpriv->gpioc_R = devpriv->bar0_mem + MF624_GPIOC_R;
239
240 ret = comedi_alloc_subdevices(dev, 4);
241 if (ret)
242 return ret;
243
244 /* ADC */
245 s = &dev->subdevices[0];
246 s->type = COMEDI_SUBD_AI;
247 s->subdev_flags = SDF_READABLE | SDF_GROUND;
248 s->n_chan = 8;
249 s->maxdata = 0x3fff; /* 14 bits ADC */
250 s->range_table = &range_bipolar10;
251 s->insn_read = mf6x4_ai_insn_read;
252
253 /* DAC */
254 s = &dev->subdevices[1];
255 s->type = COMEDI_SUBD_AO;
256 s->subdev_flags = SDF_WRITABLE;
257 s->n_chan = 8;
258 s->maxdata = 0x3fff; /* 14 bits DAC */
259 s->range_table = &range_bipolar10;
260 s->insn_write = mf6x4_ao_insn_write;
261
262 ret = comedi_alloc_subdev_readback(s);
263 if (ret)
264 return ret;
265
266 /* DIN */
267 s = &dev->subdevices[2];
268 s->type = COMEDI_SUBD_DI;
269 s->subdev_flags = SDF_READABLE;
270 s->n_chan = 8;
271 s->maxdata = 1;
272 s->range_table = &range_digital;
273 s->insn_bits = mf6x4_di_insn_bits;
274
275 /* DOUT */
276 s = &dev->subdevices[3];
277 s->type = COMEDI_SUBD_DO;
278 s->subdev_flags = SDF_WRITABLE;
279 s->n_chan = 8;
280 s->maxdata = 1;
281 s->range_table = &range_digital;
282 s->insn_bits = mf6x4_do_insn_bits;
283
284 return 0;
285 }
286
mf6x4_detach(struct comedi_device * dev)287 static void mf6x4_detach(struct comedi_device *dev)
288 {
289 struct mf6x4_private *devpriv = dev->private;
290
291 if (devpriv) {
292 if (devpriv->bar0_mem)
293 iounmap(devpriv->bar0_mem);
294 if (devpriv->bar2_mem)
295 iounmap(devpriv->bar2_mem);
296 }
297 comedi_pci_detach(dev);
298 }
299
300 static struct comedi_driver mf6x4_driver = {
301 .driver_name = "mf6x4",
302 .module = THIS_MODULE,
303 .auto_attach = mf6x4_auto_attach,
304 .detach = mf6x4_detach,
305 };
306
mf6x4_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)307 static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
308 {
309 return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
310 }
311
312 static const struct pci_device_id mf6x4_pci_table[] = {
313 { PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
314 { PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
315 { 0 }
316 };
317 MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
318
319 static struct pci_driver mf6x4_pci_driver = {
320 .name = "mf6x4",
321 .id_table = mf6x4_pci_table,
322 .probe = mf6x4_pci_probe,
323 .remove = comedi_pci_auto_unconfig,
324 };
325
326 module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
327
328 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
329 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
330 MODULE_LICENSE("GPL");
331