2 * comedi/drivers/mf6x4.c
3 * Driver for Humusoft MF634 and MF624 Data acquisition cards
5 * COMEDI - Linux Control and Measurement Device Interface
6 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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.
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.
20 * Description: Humusoft MF634 and MF624 Data acquisition card driver
21 * Devices: [Humusoft] MF634 (mf634), MF624 (mf624)
22 * Author: Rostislav Lisovy <lisovy@gmail.com>
25 * Configuration Options: none
28 #include <linux/module.h>
29 #include <linux/delay.h>
31 #include "../comedi_pci.h"
33 /* Registers present in BAR0 memory region */
34 #define MF624_GPIOC_R 0x54
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)
41 #define MF6X4_DIN_R 0x10
42 #define MF6X4_DIN_M 0xff
43 #define MF6X4_DOUT_R 0x10
44 #define MF6X4_DOUT_M 0xff
46 #define MF6X4_ADSTART_R 0x20
47 #define MF6X4_ADDATA_R 0x00
48 #define MF6X4_ADCTRL_R 0x00
49 #define MF6X4_ADCTRL_M 0xff
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))
63 #define MF634_GPIOC_R 0x68
72 unsigned int bar_nums
[3]; /* We need to keep track of the
73 order of BARs used by the cards */
76 static const struct mf6x4_board mf6x4_boards
[] = {
79 .bar_nums
= {0, 2, 3},
83 .bar_nums
= {0, 2, 4},
87 struct mf6x4_private
{
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
94 void __iomem
*bar0_mem
;
95 void __iomem
*bar2_mem
;
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
102 void __iomem
*gpioc_R
;
105 static int mf6x4_di_insn_bits(struct comedi_device
*dev
,
106 struct comedi_subdevice
*s
,
107 struct comedi_insn
*insn
,
110 data
[1] = ioread16(dev
->mmio
+ MF6X4_DIN_R
) & MF6X4_DIN_M
;
115 static int mf6x4_do_insn_bits(struct comedi_device
*dev
,
116 struct comedi_subdevice
*s
,
117 struct comedi_insn
*insn
,
120 if (comedi_dio_update_state(s
, data
))
121 iowrite16(s
->state
& MF6X4_DOUT_M
, dev
->mmio
+ MF6X4_DOUT_R
);
128 static int mf6x4_ai_eoc(struct comedi_device
*dev
,
129 struct comedi_subdevice
*s
,
130 struct comedi_insn
*insn
,
131 unsigned long context
)
133 struct mf6x4_private
*devpriv
= dev
->private;
136 status
= ioread32(devpriv
->gpioc_R
);
137 if (status
& MF6X4_GPIOC_EOLC
)
142 static int mf6x4_ai_insn_read(struct comedi_device
*dev
,
143 struct comedi_subdevice
*s
,
144 struct comedi_insn
*insn
,
147 int chan
= CR_CHAN(insn
->chanspec
);
152 /* Set the ADC channel number in the scan list */
153 iowrite16((1 << chan
) & MF6X4_ADCTRL_M
, dev
->mmio
+ MF6X4_ADCTRL_R
);
155 for (i
= 0; i
< insn
->n
; i
++) {
156 /* Trigger ADC conversion by reading ADSTART */
157 ioread16(dev
->mmio
+ MF6X4_ADSTART_R
);
159 ret
= comedi_timeout(dev
, s
, insn
, mf6x4_ai_eoc
, 0);
163 /* Read the actual value */
164 d
= ioread16(dev
->mmio
+ MF6X4_ADDATA_R
);
169 iowrite16(0x0, dev
->mmio
+ MF6X4_ADCTRL_R
);
174 static int mf6x4_ao_insn_write(struct comedi_device
*dev
,
175 struct comedi_subdevice
*s
,
176 struct comedi_insn
*insn
,
179 struct mf6x4_private
*devpriv
= dev
->private;
180 unsigned int chan
= CR_CHAN(insn
->chanspec
);
181 unsigned int val
= s
->readback
[chan
];
185 /* Enable instantaneous update of converters outputs + Enable DACs */
186 gpioc
= ioread32(devpriv
->gpioc_R
);
187 iowrite32((gpioc
& ~MF6X4_GPIOC_LDAC
) | MF6X4_GPIOC_DACEN
,
190 for (i
= 0; i
< insn
->n
; i
++) {
192 iowrite16(val
, dev
->mmio
+ MF6X4_DAC_R(chan
));
194 s
->readback
[chan
] = val
;
199 static int mf6x4_auto_attach(struct comedi_device
*dev
, unsigned long context
)
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
;
207 if (context
< ARRAY_SIZE(mf6x4_boards
))
208 board
= &mf6x4_boards
[context
];
212 dev
->board_ptr
= board
;
213 dev
->board_name
= board
->name
;
215 ret
= comedi_pci_enable(dev
);
219 devpriv
= comedi_alloc_devpriv(dev
, sizeof(*devpriv
));
223 devpriv
->bar0_mem
= pci_ioremap_bar(pcidev
, board
->bar_nums
[0]);
224 if (!devpriv
->bar0_mem
)
227 dev
->mmio
= pci_ioremap_bar(pcidev
, board
->bar_nums
[1]);
231 devpriv
->bar2_mem
= pci_ioremap_bar(pcidev
, board
->bar_nums
[2]);
232 if (!devpriv
->bar2_mem
)
235 if (board
== &mf6x4_boards
[BOARD_MF634
])
236 devpriv
->gpioc_R
= devpriv
->bar2_mem
+ MF634_GPIOC_R
;
238 devpriv
->gpioc_R
= devpriv
->bar0_mem
+ MF624_GPIOC_R
;
240 ret
= comedi_alloc_subdevices(dev
, 4);
245 s
= &dev
->subdevices
[0];
246 s
->type
= COMEDI_SUBD_AI
;
247 s
->subdev_flags
= SDF_READABLE
| SDF_GROUND
;
249 s
->maxdata
= 0x3fff; /* 14 bits ADC */
250 s
->range_table
= &range_bipolar10
;
251 s
->insn_read
= mf6x4_ai_insn_read
;
254 s
= &dev
->subdevices
[1];
255 s
->type
= COMEDI_SUBD_AO
;
256 s
->subdev_flags
= SDF_WRITABLE
;
258 s
->maxdata
= 0x3fff; /* 14 bits DAC */
259 s
->range_table
= &range_bipolar10
;
260 s
->insn_write
= mf6x4_ao_insn_write
;
262 ret
= comedi_alloc_subdev_readback(s
);
267 s
= &dev
->subdevices
[2];
268 s
->type
= COMEDI_SUBD_DI
;
269 s
->subdev_flags
= SDF_READABLE
;
272 s
->range_table
= &range_digital
;
273 s
->insn_bits
= mf6x4_di_insn_bits
;
276 s
= &dev
->subdevices
[3];
277 s
->type
= COMEDI_SUBD_DO
;
278 s
->subdev_flags
= SDF_WRITABLE
;
281 s
->range_table
= &range_digital
;
282 s
->insn_bits
= mf6x4_do_insn_bits
;
287 static void mf6x4_detach(struct comedi_device
*dev
)
289 struct mf6x4_private
*devpriv
= dev
->private;
292 if (devpriv
->bar0_mem
)
293 iounmap(devpriv
->bar0_mem
);
294 if (devpriv
->bar2_mem
)
295 iounmap(devpriv
->bar2_mem
);
297 comedi_pci_detach(dev
);
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
,
307 static int mf6x4_pci_probe(struct pci_dev
*dev
, const struct pci_device_id
*id
)
309 return comedi_pci_auto_config(dev
, &mf6x4_driver
, id
->driver_data
);
312 static const struct pci_device_id mf6x4_pci_table
[] = {
313 { PCI_VDEVICE(HUMUSOFT
, 0x0634), BOARD_MF634
},
314 { PCI_VDEVICE(HUMUSOFT
, 0x0624), BOARD_MF624
},
317 MODULE_DEVICE_TABLE(pci
, mf6x4_pci_table
);
319 static struct pci_driver mf6x4_pci_driver
= {
321 .id_table
= mf6x4_pci_table
,
322 .probe
= mf6x4_pci_probe
,
323 .remove
= comedi_pci_auto_unconfig
,
326 module_comedi_pci_driver(mf6x4_driver
, mf6x4_pci_driver
);
328 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
329 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
330 MODULE_LICENSE("GPL");