1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * comedi/drivers/mf6x4.c
4 * Driver for Humusoft MF634 and MF624 Data acquisition cards
5 *
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 */
9 /*
10 * Driver: mf6x4
11 * Description: Humusoft MF634 and MF624 Data acquisition card driver
12 * Devices: [Humusoft] MF634 (mf634), MF624 (mf624)
13 * Author: Rostislav Lisovy <lisovy@gmail.com>
14 * Status: works
15 * Updated:
16 * Configuration Options: none
17 */
18
19 #include <linux/module.h>
20 #include <linux/delay.h>
21
22 #include "../comedi_pci.h"
23
24 /* Registers present in BAR0 memory region */
25 #define MF624_GPIOC_REG 0x54
26
27 #define MF6X4_GPIOC_EOLC BIT(17) /* End Of Last Conversion */
28 #define MF6X4_GPIOC_LDAC BIT(23) /* Load DACs */
29 #define MF6X4_GPIOC_DACEN BIT(26)
30
31 /* BAR1 registers */
32 #define MF6X4_ADDATA_REG 0x00
33 #define MF6X4_ADCTRL_REG 0x00
34 #define MF6X4_ADCTRL_CHAN(x) BIT(chan)
35 #define MF6X4_DIN_REG 0x10
36 #define MF6X4_DIN_MASK 0xff
37 #define MF6X4_DOUT_REG 0x10
38 #define MF6X4_ADSTART_REG 0x20
39 #define MF6X4_DAC_REG(x) (0x20 + ((x) * 2))
40
41 /* BAR2 registers */
42 #define MF634_GPIOC_REG 0x68
43
44 enum mf6x4_boardid {
45 BOARD_MF634,
46 BOARD_MF624,
47 };
48
49 struct mf6x4_board {
50 const char *name;
51 /* We need to keep track of the order of BARs used by the cards */
52 unsigned int bar_nums[3];
53 };
54
55 static const struct mf6x4_board mf6x4_boards[] = {
56 [BOARD_MF634] = {
57 .name = "mf634",
58 .bar_nums = {0, 2, 3},
59 },
60 [BOARD_MF624] = {
61 .name = "mf624",
62 .bar_nums = {0, 2, 4},
63 },
64 };
65
66 struct mf6x4_private {
67 /*
68 * Documentation for both MF634 and MF624 describes registers
69 * present in BAR0, 1 and 2 regions.
70 * The real (i.e. in HW) BAR numbers are different for MF624
71 * and MF634 yet we will call them 0, 1, 2
72 */
73 void __iomem *bar0_mem;
74 void __iomem *bar2_mem;
75
76 /*
77 * This configuration register has the same function and fields
78 * for both cards however it lies in different BARs on different
79 * offsets -- this variable makes the access easier
80 */
81 void __iomem *gpioc_reg;
82 };
83
mf6x4_di_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)84 static int mf6x4_di_insn_bits(struct comedi_device *dev,
85 struct comedi_subdevice *s,
86 struct comedi_insn *insn,
87 unsigned int *data)
88 {
89 data[1] = ioread16(dev->mmio + MF6X4_DIN_REG) & MF6X4_DIN_MASK;
90
91 return insn->n;
92 }
93
mf6x4_do_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)94 static int mf6x4_do_insn_bits(struct comedi_device *dev,
95 struct comedi_subdevice *s,
96 struct comedi_insn *insn,
97 unsigned int *data)
98 {
99 if (comedi_dio_update_state(s, data))
100 iowrite16(s->state, dev->mmio + MF6X4_DOUT_REG);
101
102 data[1] = s->state;
103
104 return insn->n;
105 }
106
mf6x4_ai_eoc(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned long context)107 static int mf6x4_ai_eoc(struct comedi_device *dev,
108 struct comedi_subdevice *s,
109 struct comedi_insn *insn,
110 unsigned long context)
111 {
112 struct mf6x4_private *devpriv = dev->private;
113 unsigned int status;
114
115 status = ioread32(devpriv->gpioc_reg);
116 if (status & MF6X4_GPIOC_EOLC)
117 return 0;
118 return -EBUSY;
119 }
120
mf6x4_ai_insn_read(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)121 static int mf6x4_ai_insn_read(struct comedi_device *dev,
122 struct comedi_subdevice *s,
123 struct comedi_insn *insn,
124 unsigned int *data)
125 {
126 unsigned int chan = CR_CHAN(insn->chanspec);
127 unsigned int d;
128 int ret;
129 int i;
130
131 /* Set the ADC channel number in the scan list */
132 iowrite16(MF6X4_ADCTRL_CHAN(chan), dev->mmio + MF6X4_ADCTRL_REG);
133
134 for (i = 0; i < insn->n; i++) {
135 /* Trigger ADC conversion by reading ADSTART */
136 ioread16(dev->mmio + MF6X4_ADSTART_REG);
137
138 ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
139 if (ret)
140 return ret;
141
142 /* Read the actual value */
143 d = ioread16(dev->mmio + MF6X4_ADDATA_REG);
144 d &= s->maxdata;
145 /* munge the 2's complement data to offset binary */
146 data[i] = comedi_offset_munge(s, d);
147 }
148
149 iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_REG);
150
151 return insn->n;
152 }
153
mf6x4_ao_insn_write(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)154 static int mf6x4_ao_insn_write(struct comedi_device *dev,
155 struct comedi_subdevice *s,
156 struct comedi_insn *insn,
157 unsigned int *data)
158 {
159 struct mf6x4_private *devpriv = dev->private;
160 unsigned int chan = CR_CHAN(insn->chanspec);
161 unsigned int val = s->readback[chan];
162 unsigned int gpioc;
163 int i;
164
165 /* Enable instantaneous update of converters outputs + Enable DACs */
166 gpioc = ioread32(devpriv->gpioc_reg);
167 iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
168 devpriv->gpioc_reg);
169
170 for (i = 0; i < insn->n; i++) {
171 val = data[i];
172 iowrite16(val, dev->mmio + MF6X4_DAC_REG(chan));
173 }
174 s->readback[chan] = val;
175
176 return insn->n;
177 }
178
mf6x4_auto_attach(struct comedi_device * dev,unsigned long context)179 static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
180 {
181 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
182 const struct mf6x4_board *board = NULL;
183 struct mf6x4_private *devpriv;
184 struct comedi_subdevice *s;
185 int ret;
186
187 if (context < ARRAY_SIZE(mf6x4_boards))
188 board = &mf6x4_boards[context];
189 else
190 return -ENODEV;
191
192 dev->board_ptr = board;
193 dev->board_name = board->name;
194
195 ret = comedi_pci_enable(dev);
196 if (ret)
197 return ret;
198
199 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
200 if (!devpriv)
201 return -ENOMEM;
202
203 devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
204 if (!devpriv->bar0_mem)
205 return -ENODEV;
206
207 dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
208 if (!dev->mmio)
209 return -ENODEV;
210
211 devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
212 if (!devpriv->bar2_mem)
213 return -ENODEV;
214
215 if (board == &mf6x4_boards[BOARD_MF634])
216 devpriv->gpioc_reg = devpriv->bar2_mem + MF634_GPIOC_REG;
217 else
218 devpriv->gpioc_reg = devpriv->bar0_mem + MF624_GPIOC_REG;
219
220 ret = comedi_alloc_subdevices(dev, 4);
221 if (ret)
222 return ret;
223
224 /* Analog Input subdevice */
225 s = &dev->subdevices[0];
226 s->type = COMEDI_SUBD_AI;
227 s->subdev_flags = SDF_READABLE | SDF_GROUND;
228 s->n_chan = 8;
229 s->maxdata = 0x3fff;
230 s->range_table = &range_bipolar10;
231 s->insn_read = mf6x4_ai_insn_read;
232
233 /* Analog Output subdevice */
234 s = &dev->subdevices[1];
235 s->type = COMEDI_SUBD_AO;
236 s->subdev_flags = SDF_WRITABLE;
237 s->n_chan = 8;
238 s->maxdata = 0x3fff;
239 s->range_table = &range_bipolar10;
240 s->insn_write = mf6x4_ao_insn_write;
241
242 ret = comedi_alloc_subdev_readback(s);
243 if (ret)
244 return ret;
245
246 /* Digital Input subdevice */
247 s = &dev->subdevices[2];
248 s->type = COMEDI_SUBD_DI;
249 s->subdev_flags = SDF_READABLE;
250 s->n_chan = 8;
251 s->maxdata = 1;
252 s->range_table = &range_digital;
253 s->insn_bits = mf6x4_di_insn_bits;
254
255 /* Digital Output subdevice */
256 s = &dev->subdevices[3];
257 s->type = COMEDI_SUBD_DO;
258 s->subdev_flags = SDF_WRITABLE;
259 s->n_chan = 8;
260 s->maxdata = 1;
261 s->range_table = &range_digital;
262 s->insn_bits = mf6x4_do_insn_bits;
263
264 return 0;
265 }
266
mf6x4_detach(struct comedi_device * dev)267 static void mf6x4_detach(struct comedi_device *dev)
268 {
269 struct mf6x4_private *devpriv = dev->private;
270
271 if (devpriv) {
272 if (devpriv->bar0_mem)
273 iounmap(devpriv->bar0_mem);
274 if (devpriv->bar2_mem)
275 iounmap(devpriv->bar2_mem);
276 }
277 comedi_pci_detach(dev);
278 }
279
280 static struct comedi_driver mf6x4_driver = {
281 .driver_name = "mf6x4",
282 .module = THIS_MODULE,
283 .auto_attach = mf6x4_auto_attach,
284 .detach = mf6x4_detach,
285 };
286
mf6x4_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)287 static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
288 {
289 return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
290 }
291
292 static const struct pci_device_id mf6x4_pci_table[] = {
293 { PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
294 { PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
295 { 0 }
296 };
297 MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
298
299 static struct pci_driver mf6x4_pci_driver = {
300 .name = "mf6x4",
301 .id_table = mf6x4_pci_table,
302 .probe = mf6x4_pci_probe,
303 .remove = comedi_pci_auto_unconfig,
304 };
305
306 module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
307
308 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
309 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
310 MODULE_LICENSE("GPL");
311
