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>
21 #include <linux/comedi/comedi_pci.h>
23 /* Registers present in BAR0 memory region */
24 #define MF624_GPIOC_REG 0x54
26 #define MF6X4_GPIOC_EOLC BIT(17) /* End Of Last Conversion */
27 #define MF6X4_GPIOC_LDAC BIT(23) /* Load DACs */
28 #define MF6X4_GPIOC_DACEN BIT(26)
31 #define MF6X4_ADDATA_REG 0x00
32 #define MF6X4_ADCTRL_REG 0x00
33 #define MF6X4_ADCTRL_CHAN(x) BIT(chan)
34 #define MF6X4_DIN_REG 0x10
35 #define MF6X4_DIN_MASK 0xff
36 #define MF6X4_DOUT_REG 0x10
37 #define MF6X4_ADSTART_REG 0x20
38 #define MF6X4_DAC_REG(x) (0x20 + ((x) * 2))
41 #define MF634_GPIOC_REG 0x68
50 /* We need to keep track of the order of BARs used by the cards */
51 unsigned int bar_nums[3];
54 static const struct mf6x4_board mf6x4_boards[] = {
57 .bar_nums = {0, 2, 3},
61 .bar_nums = {0, 2, 4},
65 struct mf6x4_private {
67 * Documentation for both MF634 and MF624 describes registers
68 * present in BAR0, 1 and 2 regions.
69 * The real (i.e. in HW) BAR numbers are different for MF624
70 * and MF634 yet we will call them 0, 1, 2
72 void __iomem *bar0_mem;
73 void __iomem *bar2_mem;
76 * This configuration register has the same function and fields
77 * for both cards however it lies in different BARs on different
78 * offsets -- this variable makes the access easier
80 void __iomem *gpioc_reg;
83 static int mf6x4_di_insn_bits(struct comedi_device *dev,
84 struct comedi_subdevice *s,
85 struct comedi_insn *insn,
88 data[1] = ioread16(dev->mmio + MF6X4_DIN_REG) & MF6X4_DIN_MASK;
93 static int mf6x4_do_insn_bits(struct comedi_device *dev,
94 struct comedi_subdevice *s,
95 struct comedi_insn *insn,
98 if (comedi_dio_update_state(s, data))
99 iowrite16(s->state, dev->mmio + MF6X4_DOUT_REG);
106 static int mf6x4_ai_eoc(struct comedi_device *dev,
107 struct comedi_subdevice *s,
108 struct comedi_insn *insn,
109 unsigned long context)
111 struct mf6x4_private *devpriv = dev->private;
114 /* EOLC goes low at end of conversion. */
115 status = ioread32(devpriv->gpioc_reg);
116 if ((status & MF6X4_GPIOC_EOLC) == 0)
121 static int mf6x4_ai_insn_read(struct comedi_device *dev,
122 struct comedi_subdevice *s,
123 struct comedi_insn *insn,
126 unsigned int chan = CR_CHAN(insn->chanspec);
131 /* Set the ADC channel number in the scan list */
132 iowrite16(MF6X4_ADCTRL_CHAN(chan), dev->mmio + MF6X4_ADCTRL_REG);
134 for (i = 0; i < insn->n; i++) {
135 /* Trigger ADC conversion by reading ADSTART */
136 ioread16(dev->mmio + MF6X4_ADSTART_REG);
138 ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
142 /* Read the actual value */
143 d = ioread16(dev->mmio + MF6X4_ADDATA_REG);
145 /* munge the 2's complement data to offset binary */
146 data[i] = comedi_offset_munge(s, d);
149 iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_REG);
154 static int mf6x4_ao_insn_write(struct comedi_device *dev,
155 struct comedi_subdevice *s,
156 struct comedi_insn *insn,
159 struct mf6x4_private *devpriv = dev->private;
160 unsigned int chan = CR_CHAN(insn->chanspec);
161 unsigned int val = s->readback[chan];
165 /* Enable instantaneous update of converters outputs + Enable DACs */
166 gpioc = ioread32(devpriv->gpioc_reg);
167 iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
170 for (i = 0; i < insn->n; i++) {
172 iowrite16(val, dev->mmio + MF6X4_DAC_REG(chan));
174 s->readback[chan] = val;
179 static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
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;
187 if (context < ARRAY_SIZE(mf6x4_boards))
188 board = &mf6x4_boards[context];
192 dev->board_ptr = board;
193 dev->board_name = board->name;
195 ret = comedi_pci_enable(dev);
199 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
203 devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
204 if (!devpriv->bar0_mem)
207 dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
211 devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
212 if (!devpriv->bar2_mem)
215 if (board == &mf6x4_boards[BOARD_MF634])
216 devpriv->gpioc_reg = devpriv->bar2_mem + MF634_GPIOC_REG;
218 devpriv->gpioc_reg = devpriv->bar0_mem + MF624_GPIOC_REG;
220 ret = comedi_alloc_subdevices(dev, 4);
224 /* Analog Input subdevice */
225 s = &dev->subdevices[0];
226 s->type = COMEDI_SUBD_AI;
227 s->subdev_flags = SDF_READABLE | SDF_GROUND;
230 s->range_table = &range_bipolar10;
231 s->insn_read = mf6x4_ai_insn_read;
233 /* Analog Output subdevice */
234 s = &dev->subdevices[1];
235 s->type = COMEDI_SUBD_AO;
236 s->subdev_flags = SDF_WRITABLE;
239 s->range_table = &range_bipolar10;
240 s->insn_write = mf6x4_ao_insn_write;
242 ret = comedi_alloc_subdev_readback(s);
246 /* Digital Input subdevice */
247 s = &dev->subdevices[2];
248 s->type = COMEDI_SUBD_DI;
249 s->subdev_flags = SDF_READABLE;
252 s->range_table = &range_digital;
253 s->insn_bits = mf6x4_di_insn_bits;
255 /* Digital Output subdevice */
256 s = &dev->subdevices[3];
257 s->type = COMEDI_SUBD_DO;
258 s->subdev_flags = SDF_WRITABLE;
261 s->range_table = &range_digital;
262 s->insn_bits = mf6x4_do_insn_bits;
267 static void mf6x4_detach(struct comedi_device *dev)
269 struct mf6x4_private *devpriv = dev->private;
272 if (devpriv->bar0_mem)
273 iounmap(devpriv->bar0_mem);
274 if (devpriv->bar2_mem)
275 iounmap(devpriv->bar2_mem);
277 comedi_pci_detach(dev);
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,
287 static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
289 return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
292 static const struct pci_device_id mf6x4_pci_table[] = {
293 { PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
294 { PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
297 MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
299 static struct pci_driver mf6x4_pci_driver = {
301 .id_table = mf6x4_pci_table,
302 .probe = mf6x4_pci_probe,
303 .remove = comedi_pci_auto_unconfig,
306 module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
308 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
309 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
310 MODULE_LICENSE("GPL");