1 // SPDX-License-Identifier: GPL-2.0+
3 * comedi/drivers/mf6x4.c
4 * Driver for Humusoft MF634 and MF624 Data acquisition cards
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
11 * Description: Humusoft MF634 and MF624 Data acquisition card driver
12 * Devices: [Humusoft] MF634 (mf634), MF624 (mf624)
13 * Author: Rostislav Lisovy <lisovy@gmail.com>
16 * Configuration Options: none
19 #include <linux/module.h>
20 #include <linux/delay.h>
22 #include "../comedi_pci.h"
24 /* Registers present in BAR0 memory region */
25 #define MF624_GPIOC_REG 0x54
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)
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))
42 #define MF634_GPIOC_REG 0x68
51 /* We need to keep track of the order of BARs used by the cards */
52 unsigned int bar_nums[3];
55 static const struct mf6x4_board mf6x4_boards[] = {
58 .bar_nums = {0, 2, 3},
62 .bar_nums = {0, 2, 4},
66 struct mf6x4_private {
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
73 void __iomem *bar0_mem;
74 void __iomem *bar2_mem;
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
81 void __iomem *gpioc_reg;
84 static int mf6x4_di_insn_bits(struct comedi_device *dev,
85 struct comedi_subdevice *s,
86 struct comedi_insn *insn,
89 data[1] = ioread16(dev->mmio + MF6X4_DIN_REG) & MF6X4_DIN_MASK;
94 static int mf6x4_do_insn_bits(struct comedi_device *dev,
95 struct comedi_subdevice *s,
96 struct comedi_insn *insn,
99 if (comedi_dio_update_state(s, data))
100 iowrite16(s->state, dev->mmio + MF6X4_DOUT_REG);
107 static int mf6x4_ai_eoc(struct comedi_device *dev,
108 struct comedi_subdevice *s,
109 struct comedi_insn *insn,
110 unsigned long context)
112 struct mf6x4_private *devpriv = dev->private;
115 /* EOLC goes low at end of conversion. */
116 status = ioread32(devpriv->gpioc_reg);
117 if ((status & MF6X4_GPIOC_EOLC) == 0)
122 static int mf6x4_ai_insn_read(struct comedi_device *dev,
123 struct comedi_subdevice *s,
124 struct comedi_insn *insn,
127 unsigned int chan = CR_CHAN(insn->chanspec);
132 /* Set the ADC channel number in the scan list */
133 iowrite16(MF6X4_ADCTRL_CHAN(chan), dev->mmio + MF6X4_ADCTRL_REG);
135 for (i = 0; i < insn->n; i++) {
136 /* Trigger ADC conversion by reading ADSTART */
137 ioread16(dev->mmio + MF6X4_ADSTART_REG);
139 ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
143 /* Read the actual value */
144 d = ioread16(dev->mmio + MF6X4_ADDATA_REG);
146 /* munge the 2's complement data to offset binary */
147 data[i] = comedi_offset_munge(s, d);
150 iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_REG);
155 static int mf6x4_ao_insn_write(struct comedi_device *dev,
156 struct comedi_subdevice *s,
157 struct comedi_insn *insn,
160 struct mf6x4_private *devpriv = dev->private;
161 unsigned int chan = CR_CHAN(insn->chanspec);
162 unsigned int val = s->readback[chan];
166 /* Enable instantaneous update of converters outputs + Enable DACs */
167 gpioc = ioread32(devpriv->gpioc_reg);
168 iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
171 for (i = 0; i < insn->n; i++) {
173 iowrite16(val, dev->mmio + MF6X4_DAC_REG(chan));
175 s->readback[chan] = val;
180 static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
182 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
183 const struct mf6x4_board *board = NULL;
184 struct mf6x4_private *devpriv;
185 struct comedi_subdevice *s;
188 if (context < ARRAY_SIZE(mf6x4_boards))
189 board = &mf6x4_boards[context];
193 dev->board_ptr = board;
194 dev->board_name = board->name;
196 ret = comedi_pci_enable(dev);
200 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
204 devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
205 if (!devpriv->bar0_mem)
208 dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
212 devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
213 if (!devpriv->bar2_mem)
216 if (board == &mf6x4_boards[BOARD_MF634])
217 devpriv->gpioc_reg = devpriv->bar2_mem + MF634_GPIOC_REG;
219 devpriv->gpioc_reg = devpriv->bar0_mem + MF624_GPIOC_REG;
221 ret = comedi_alloc_subdevices(dev, 4);
225 /* Analog Input subdevice */
226 s = &dev->subdevices[0];
227 s->type = COMEDI_SUBD_AI;
228 s->subdev_flags = SDF_READABLE | SDF_GROUND;
231 s->range_table = &range_bipolar10;
232 s->insn_read = mf6x4_ai_insn_read;
234 /* Analog Output subdevice */
235 s = &dev->subdevices[1];
236 s->type = COMEDI_SUBD_AO;
237 s->subdev_flags = SDF_WRITABLE;
240 s->range_table = &range_bipolar10;
241 s->insn_write = mf6x4_ao_insn_write;
243 ret = comedi_alloc_subdev_readback(s);
247 /* Digital Input subdevice */
248 s = &dev->subdevices[2];
249 s->type = COMEDI_SUBD_DI;
250 s->subdev_flags = SDF_READABLE;
253 s->range_table = &range_digital;
254 s->insn_bits = mf6x4_di_insn_bits;
256 /* Digital Output subdevice */
257 s = &dev->subdevices[3];
258 s->type = COMEDI_SUBD_DO;
259 s->subdev_flags = SDF_WRITABLE;
262 s->range_table = &range_digital;
263 s->insn_bits = mf6x4_do_insn_bits;
268 static void mf6x4_detach(struct comedi_device *dev)
270 struct mf6x4_private *devpriv = dev->private;
273 if (devpriv->bar0_mem)
274 iounmap(devpriv->bar0_mem);
275 if (devpriv->bar2_mem)
276 iounmap(devpriv->bar2_mem);
278 comedi_pci_detach(dev);
281 static struct comedi_driver mf6x4_driver = {
282 .driver_name = "mf6x4",
283 .module = THIS_MODULE,
284 .auto_attach = mf6x4_auto_attach,
285 .detach = mf6x4_detach,
288 static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
290 return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
293 static const struct pci_device_id mf6x4_pci_table[] = {
294 { PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
295 { PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
298 MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
300 static struct pci_driver mf6x4_pci_driver = {
302 .id_table = mf6x4_pci_table,
303 .probe = mf6x4_pci_probe,
304 .remove = comedi_pci_auto_unconfig,
307 module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
309 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
310 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
311 MODULE_LICENSE("GPL");