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04b56502 RL |
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 | |
63f9384f | 21 | * Devices: [Humusoft] MF634 (mf634), MF624 (mf624) |
04b56502 RL |
22 | * Author: Rostislav Lisovy <lisovy@gmail.com> |
23 | * Status: works | |
24 | * Updated: | |
25 | * Configuration Options: none | |
26 | */ | |
27 | ||
28 | #include <linux/module.h> | |
04b56502 | 29 | #include <linux/delay.h> |
31ba5981 IA |
30 | |
31 | #include "../comedi_pci.h" | |
04b56502 RL |
32 | |
33 | /* Registers present in BAR0 memory region */ | |
1df2abb3 | 34 | #define MF624_GPIOC_REG 0x54 |
04b56502 | 35 | |
0b7cbf14 HS |
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) | |
04b56502 RL |
39 | |
40 | /* BAR1 registers */ | |
59706334 | 41 | #define MF6X4_ADDATA_REG 0x00 |
c9ab3023 HS |
42 | #define MF6X4_ADCTRL_REG 0x00 |
43 | #define MF6X4_ADCTRL_CHAN(x) BIT(chan) | |
b02530f5 HS |
44 | #define MF6X4_DIN_REG 0x10 |
45 | #define MF6X4_DIN_MASK 0xff | |
418c9713 | 46 | #define MF6X4_DOUT_REG 0x10 |
19e02434 HS |
47 | #define MF6X4_ADSTART_REG 0x20 |
48 | #define MF6X4_DAC_REG(x) (0x20 + ((x) * 2)) | |
04b56502 RL |
49 | |
50 | /* BAR2 registers */ | |
1df2abb3 | 51 | #define MF634_GPIOC_REG 0x68 |
04b56502 RL |
52 | |
53 | enum mf6x4_boardid { | |
54 | BOARD_MF634, | |
55 | BOARD_MF624, | |
56 | }; | |
57 | ||
58 | struct mf6x4_board { | |
59 | const char *name; | |
ae573713 HS |
60 | /* We need to keep track of the order of BARs used by the cards */ |
61 | unsigned int bar_nums[3]; | |
04b56502 RL |
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; | |
04b56502 RL |
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 | */ | |
1df2abb3 | 90 | void __iomem *gpioc_reg; |
04b56502 RL |
91 | }; |
92 | ||
93 | static int mf6x4_di_insn_bits(struct comedi_device *dev, | |
56570044 HS |
94 | struct comedi_subdevice *s, |
95 | struct comedi_insn *insn, | |
96 | unsigned int *data) | |
04b56502 | 97 | { |
b02530f5 | 98 | data[1] = ioread16(dev->mmio + MF6X4_DIN_REG) & MF6X4_DIN_MASK; |
04b56502 RL |
99 | |
100 | return insn->n; | |
101 | } | |
102 | ||
103 | static int mf6x4_do_insn_bits(struct comedi_device *dev, | |
56570044 HS |
104 | struct comedi_subdevice *s, |
105 | struct comedi_insn *insn, | |
106 | unsigned int *data) | |
04b56502 | 107 | { |
04b56502 | 108 | if (comedi_dio_update_state(s, data)) |
418c9713 | 109 | iowrite16(s->state, dev->mmio + MF6X4_DOUT_REG); |
04b56502 RL |
110 | |
111 | data[1] = s->state; | |
112 | ||
113 | return insn->n; | |
114 | } | |
115 | ||
acb069c0 HS |
116 | static int mf6x4_ai_eoc(struct comedi_device *dev, |
117 | struct comedi_subdevice *s, | |
118 | struct comedi_insn *insn, | |
119 | unsigned long context) | |
04b56502 RL |
120 | { |
121 | struct mf6x4_private *devpriv = dev->private; | |
acb069c0 | 122 | unsigned int status; |
04b56502 | 123 | |
1df2abb3 | 124 | status = ioread32(devpriv->gpioc_reg); |
acb069c0 HS |
125 | if (status & MF6X4_GPIOC_EOLC) |
126 | return 0; | |
127 | return -EBUSY; | |
04b56502 RL |
128 | } |
129 | ||
130 | static int mf6x4_ai_insn_read(struct comedi_device *dev, | |
131 | struct comedi_subdevice *s, | |
56570044 HS |
132 | struct comedi_insn *insn, |
133 | unsigned int *data) | |
04b56502 | 134 | { |
c9ab3023 | 135 | unsigned int chan = CR_CHAN(insn->chanspec); |
59706334 | 136 | unsigned int d; |
04b56502 RL |
137 | int ret; |
138 | int i; | |
04b56502 RL |
139 | |
140 | /* Set the ADC channel number in the scan list */ | |
c9ab3023 | 141 | iowrite16(MF6X4_ADCTRL_CHAN(chan), dev->mmio + MF6X4_ADCTRL_REG); |
04b56502 RL |
142 | |
143 | for (i = 0; i < insn->n; i++) { | |
144 | /* Trigger ADC conversion by reading ADSTART */ | |
19e02434 | 145 | ioread16(dev->mmio + MF6X4_ADSTART_REG); |
04b56502 | 146 | |
acb069c0 | 147 | ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0); |
04b56502 RL |
148 | if (ret) |
149 | return ret; | |
150 | ||
151 | /* Read the actual value */ | |
59706334 | 152 | d = ioread16(dev->mmio + MF6X4_ADDATA_REG); |
04b56502 | 153 | d &= s->maxdata; |
59706334 HS |
154 | /* munge the 2's complement data to offset binary */ |
155 | data[i] = comedi_offset_munge(s, d); | |
04b56502 RL |
156 | } |
157 | ||
c9ab3023 | 158 | iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_REG); |
04b56502 RL |
159 | |
160 | return insn->n; | |
161 | } | |
162 | ||
163 | static int mf6x4_ao_insn_write(struct comedi_device *dev, | |
164 | struct comedi_subdevice *s, | |
56570044 HS |
165 | struct comedi_insn *insn, |
166 | unsigned int *data) | |
04b56502 RL |
167 | { |
168 | struct mf6x4_private *devpriv = dev->private; | |
169 | unsigned int chan = CR_CHAN(insn->chanspec); | |
0c8fb386 | 170 | unsigned int val = s->readback[chan]; |
21cf4eed | 171 | unsigned int gpioc; |
04b56502 RL |
172 | int i; |
173 | ||
174 | /* Enable instantaneous update of converters outputs + Enable DACs */ | |
1df2abb3 | 175 | gpioc = ioread32(devpriv->gpioc_reg); |
04b56502 | 176 | iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN, |
1df2abb3 | 177 | devpriv->gpioc_reg); |
04b56502 RL |
178 | |
179 | for (i = 0; i < insn->n; i++) { | |
496e7cd9 | 180 | val = data[i]; |
19e02434 | 181 | iowrite16(val, dev->mmio + MF6X4_DAC_REG(chan)); |
04b56502 | 182 | } |
0c8fb386 | 183 | s->readback[chan] = val; |
04b56502 RL |
184 | |
185 | return insn->n; | |
186 | } | |
187 | ||
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 | ||
56570044 HS |
216 | dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]); |
217 | if (!dev->mmio) | |
04b56502 RL |
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]) | |
1df2abb3 | 225 | devpriv->gpioc_reg = devpriv->bar2_mem + MF634_GPIOC_REG; |
04b56502 | 226 | else |
1df2abb3 | 227 | devpriv->gpioc_reg = devpriv->bar0_mem + MF624_GPIOC_REG; |
04b56502 | 228 | |
04b56502 RL |
229 | ret = comedi_alloc_subdevices(dev, 4); |
230 | if (ret) | |
231 | return ret; | |
232 | ||
fa7ac9c0 | 233 | /* Analog Input subdevice */ |
04b56502 | 234 | s = &dev->subdevices[0]; |
fa7ac9c0 HS |
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 */ | |
04b56502 | 243 | s = &dev->subdevices[1]; |
fa7ac9c0 HS |
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; | |
0c8fb386 HS |
250 | |
251 | ret = comedi_alloc_subdev_readback(s); | |
252 | if (ret) | |
253 | return ret; | |
04b56502 | 254 | |
fa7ac9c0 | 255 | /* Digital Input subdevice */ |
04b56502 | 256 | s = &dev->subdevices[2]; |
fa7ac9c0 HS |
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 */ | |
04b56502 | 265 | s = &dev->subdevices[3]; |
fa7ac9c0 HS |
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; | |
04b56502 RL |
272 | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static void mf6x4_detach(struct comedi_device *dev) | |
277 | { | |
278 | struct mf6x4_private *devpriv = dev->private; | |
279 | ||
aac307f9 HS |
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); | |
04b56502 RL |
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 | ||
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"); |