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Linux/drivers/staging/comedi/drivers/addi_apci_3501.c

  1 /*
  2  * addi_apci_3501.c
  3  * Copyright (C) 2004,2005  ADDI-DATA GmbH for the source code of this module.
  4  * Project manager: Eric Stolz
  5  *
  6  *      ADDI-DATA GmbH
  7  *      Dieselstrasse 3
  8  *      D-77833 Ottersweier
  9  *      Tel: +19(0)7223/9493-0
 10  *      Fax: +49(0)7223/9493-92
 11  *      http://www.addi-data.com
 12  *      info@addi-data.com
 13  *
 14  * This program is free software; you can redistribute it and/or modify it
 15  * under the terms of the GNU General Public License as published by the
 16  * Free Software Foundation; either version 2 of the License, or (at your
 17  * option) any later version.
 18  *
 19  * This program is distributed in the hope that it will be useful, but WITHOUT
 20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 21  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 22  * more details.
 23  */
 24 
 25 #include <linux/module.h>
 26 #include <linux/pci.h>
 27 #include <linux/interrupt.h>
 28 #include <linux/sched.h>
 29 
 30 #include "../comedidev.h"
 31 #include "comedi_fc.h"
 32 #include "amcc_s5933.h"
 33 
 34 /*
 35  * PCI bar 1 register I/O map
 36  */
 37 #define APCI3501_AO_CTRL_STATUS_REG             0x00
 38 #define APCI3501_AO_CTRL_BIPOLAR                (1 << 0)
 39 #define APCI3501_AO_STATUS_READY                (1 << 8)
 40 #define APCI3501_AO_DATA_REG                    0x04
 41 #define APCI3501_AO_DATA_CHAN(x)                ((x) << 0)
 42 #define APCI3501_AO_DATA_VAL(x)                 ((x) << 8)
 43 #define APCI3501_AO_DATA_BIPOLAR                (1 << 31)
 44 #define APCI3501_AO_TRIG_SCS_REG                0x08
 45 #define APCI3501_TIMER_SYNC_REG                 0x20
 46 #define APCI3501_TIMER_RELOAD_REG               0x24
 47 #define APCI3501_TIMER_TIMEBASE_REG             0x28
 48 #define APCI3501_TIMER_CTRL_REG                 0x2c
 49 #define APCI3501_TIMER_STATUS_REG               0x30
 50 #define APCI3501_TIMER_IRQ_REG                  0x34
 51 #define APCI3501_TIMER_WARN_RELOAD_REG          0x38
 52 #define APCI3501_TIMER_WARN_TIMEBASE_REG        0x3c
 53 #define APCI3501_DO_REG                         0x40
 54 #define APCI3501_DI_REG                         0x50
 55 
 56 /*
 57  * AMCC S5933 NVRAM
 58  */
 59 #define NVRAM_USER_DATA_START   0x100
 60 
 61 #define NVCMD_BEGIN_READ        (0x7 << 5)
 62 #define NVCMD_LOAD_LOW          (0x4 << 5)
 63 #define NVCMD_LOAD_HIGH         (0x5 << 5)
 64 
 65 /*
 66  * Function types stored in the eeprom
 67  */
 68 #define EEPROM_DIGITALINPUT             0
 69 #define EEPROM_DIGITALOUTPUT            1
 70 #define EEPROM_ANALOGINPUT              2
 71 #define EEPROM_ANALOGOUTPUT             3
 72 #define EEPROM_TIMER                    4
 73 #define EEPROM_WATCHDOG                 5
 74 #define EEPROM_TIMER_WATCHDOG_COUNTER   10
 75 
 76 struct apci3501_private {
 77         int i_IobaseAmcc;
 78         struct task_struct *tsk_Current;
 79         unsigned char b_TimerSelectMode;
 80 };
 81 
 82 static struct comedi_lrange apci3501_ao_range = {
 83         2, {
 84                 BIP_RANGE(10),
 85                 UNI_RANGE(10)
 86         }
 87 };
 88 
 89 static int apci3501_wait_for_dac(struct comedi_device *dev)
 90 {
 91         unsigned int status;
 92 
 93         do {
 94                 status = inl(dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
 95         } while (!(status & APCI3501_AO_STATUS_READY));
 96 
 97         return 0;
 98 }
 99 
100 static int apci3501_ao_insn_write(struct comedi_device *dev,
101                                   struct comedi_subdevice *s,
102                                   struct comedi_insn *insn,
103                                   unsigned int *data)
104 {
105         unsigned int chan = CR_CHAN(insn->chanspec);
106         unsigned int range = CR_RANGE(insn->chanspec);
107         unsigned int cfg = APCI3501_AO_DATA_CHAN(chan);
108         int ret;
109         int i;
110 
111         /*
112          * All analog output channels have the same output range.
113          *      14-bit bipolar: 0-10V
114          *      13-bit unipolar: +/-10V
115          * Changing the range of one channel changes all of them!
116          */
117         if (range) {
118                 outl(0, dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
119         } else {
120                 cfg |= APCI3501_AO_DATA_BIPOLAR;
121                 outl(APCI3501_AO_CTRL_BIPOLAR,
122                      dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
123         }
124 
125         for (i = 0; i < insn->n; i++) {
126                 unsigned int val = data[i];
127 
128                 if (range == 1) {
129                         if (data[i] > 0x1fff) {
130                                 dev_err(dev->class_dev,
131                                         "Unipolar resolution is only 13-bits\n");
132                                 return -EINVAL;
133                         }
134                 }
135 
136                 ret = apci3501_wait_for_dac(dev);
137                 if (ret)
138                         return ret;
139 
140                 outl(cfg | APCI3501_AO_DATA_VAL(val),
141                      dev->iobase + APCI3501_AO_DATA_REG);
142 
143                 s->readback[chan] = val;
144         }
145 
146         return insn->n;
147 }
148 
149 #include "addi-data/hwdrv_apci3501.c"
150 
151 static int apci3501_di_insn_bits(struct comedi_device *dev,
152                                  struct comedi_subdevice *s,
153                                  struct comedi_insn *insn,
154                                  unsigned int *data)
155 {
156         data[1] = inl(dev->iobase + APCI3501_DI_REG) & 0x3;
157 
158         return insn->n;
159 }
160 
161 static int apci3501_do_insn_bits(struct comedi_device *dev,
162                                  struct comedi_subdevice *s,
163                                  struct comedi_insn *insn,
164                                  unsigned int *data)
165 {
166         s->state = inl(dev->iobase + APCI3501_DO_REG);
167 
168         if (comedi_dio_update_state(s, data))
169                 outl(s->state, dev->iobase + APCI3501_DO_REG);
170 
171         data[1] = s->state;
172 
173         return insn->n;
174 }
175 
176 static void apci3501_eeprom_wait(unsigned long iobase)
177 {
178         unsigned char val;
179 
180         do {
181                 val = inb(iobase + AMCC_OP_REG_MCSR_NVCMD);
182         } while (val & 0x80);
183 }
184 
185 static unsigned short apci3501_eeprom_readw(unsigned long iobase,
186                                             unsigned short addr)
187 {
188         unsigned short val = 0;
189         unsigned char tmp;
190         unsigned char i;
191 
192         /* Add the offset to the start of the user data */
193         addr += NVRAM_USER_DATA_START;
194 
195         for (i = 0; i < 2; i++) {
196                 /* Load the low 8 bit address */
197                 outb(NVCMD_LOAD_LOW, iobase + AMCC_OP_REG_MCSR_NVCMD);
198                 apci3501_eeprom_wait(iobase);
199                 outb((addr + i) & 0xff, iobase + AMCC_OP_REG_MCSR_NVDATA);
200                 apci3501_eeprom_wait(iobase);
201 
202                 /* Load the high 8 bit address */
203                 outb(NVCMD_LOAD_HIGH, iobase + AMCC_OP_REG_MCSR_NVCMD);
204                 apci3501_eeprom_wait(iobase);
205                 outb(((addr + i) >> 8) & 0xff,
206                         iobase + AMCC_OP_REG_MCSR_NVDATA);
207                 apci3501_eeprom_wait(iobase);
208 
209                 /* Read the eeprom data byte */
210                 outb(NVCMD_BEGIN_READ, iobase + AMCC_OP_REG_MCSR_NVCMD);
211                 apci3501_eeprom_wait(iobase);
212                 tmp = inb(iobase + AMCC_OP_REG_MCSR_NVDATA);
213                 apci3501_eeprom_wait(iobase);
214 
215                 if (i == 0)
216                         val |= tmp;
217                 else
218                         val |= (tmp << 8);
219         }
220 
221         return val;
222 }
223 
224 static int apci3501_eeprom_get_ao_n_chan(struct comedi_device *dev)
225 {
226         struct apci3501_private *devpriv = dev->private;
227         unsigned long iobase = devpriv->i_IobaseAmcc;
228         unsigned char nfuncs;
229         int i;
230 
231         nfuncs = apci3501_eeprom_readw(iobase, 10) & 0xff;
232 
233         /* Read functionality details */
234         for (i = 0; i < nfuncs; i++) {
235                 unsigned short offset = i * 4;
236                 unsigned short addr;
237                 unsigned char func;
238                 unsigned short val;
239 
240                 func = apci3501_eeprom_readw(iobase, 12 + offset) & 0x3f;
241                 addr = apci3501_eeprom_readw(iobase, 14 + offset);
242 
243                 if (func == EEPROM_ANALOGOUTPUT) {
244                         val = apci3501_eeprom_readw(iobase, addr + 10);
245                         return (val >> 4) & 0x3ff;
246                 }
247         }
248         return 0;
249 }
250 
251 static int apci3501_eeprom_insn_read(struct comedi_device *dev,
252                                      struct comedi_subdevice *s,
253                                      struct comedi_insn *insn,
254                                      unsigned int *data)
255 {
256         struct apci3501_private *devpriv = dev->private;
257         unsigned short addr = CR_CHAN(insn->chanspec);
258 
259         data[0] = apci3501_eeprom_readw(devpriv->i_IobaseAmcc, 2 * addr);
260 
261         return insn->n;
262 }
263 
264 static irqreturn_t apci3501_interrupt(int irq, void *d)
265 {
266         struct comedi_device *dev = d;
267         struct apci3501_private *devpriv = dev->private;
268         unsigned int ui_Timer_AOWatchdog;
269         unsigned long ul_Command1;
270         int i_temp;
271 
272         /*  Disable Interrupt */
273         ul_Command1 = inl(dev->iobase + APCI3501_TIMER_CTRL_REG);
274         ul_Command1 = (ul_Command1 & 0xFFFFF9FDul);
275         outl(ul_Command1, dev->iobase + APCI3501_TIMER_CTRL_REG);
276 
277         ui_Timer_AOWatchdog = inl(dev->iobase + APCI3501_TIMER_IRQ_REG) & 0x1;
278         if ((!ui_Timer_AOWatchdog)) {
279                 dev_err(dev->class_dev, "IRQ from unknown source\n");
280                 return IRQ_NONE;
281         }
282 
283         /* Enable Interrupt Send a signal to from kernel to user space */
284         send_sig(SIGIO, devpriv->tsk_Current, 0);
285         ul_Command1 = inl(dev->iobase + APCI3501_TIMER_CTRL_REG);
286         ul_Command1 = ((ul_Command1 & 0xFFFFF9FDul) | 1 << 1);
287         outl(ul_Command1, dev->iobase + APCI3501_TIMER_CTRL_REG);
288         i_temp = inl(dev->iobase + APCI3501_TIMER_STATUS_REG) & 0x1;
289 
290         return IRQ_HANDLED;
291 }
292 
293 static int apci3501_reset(struct comedi_device *dev)
294 {
295         unsigned int val;
296         int chan;
297         int ret;
298 
299         /* Reset all digital outputs to "" */
300         outl(0x0, dev->iobase + APCI3501_DO_REG);
301 
302         /* Default all analog outputs to 0V (bipolar) */
303         outl(APCI3501_AO_CTRL_BIPOLAR,
304              dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
305         val = APCI3501_AO_DATA_BIPOLAR | APCI3501_AO_DATA_VAL(0);
306 
307         /* Set all analog output channels */
308         for (chan = 0; chan < 8; chan++) {
309                 ret = apci3501_wait_for_dac(dev);
310                 if (ret) {
311                         dev_warn(dev->class_dev,
312                                  "%s: DAC not-ready for channel %i\n",
313                                  __func__, chan);
314                 } else {
315                         outl(val | APCI3501_AO_DATA_CHAN(chan),
316                              dev->iobase + APCI3501_AO_DATA_REG);
317                 }
318         }
319 
320         return 0;
321 }
322 
323 static int apci3501_auto_attach(struct comedi_device *dev,
324                                 unsigned long context_unused)
325 {
326         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
327         struct apci3501_private *devpriv;
328         struct comedi_subdevice *s;
329         int ao_n_chan;
330         int ret;
331 
332         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
333         if (!devpriv)
334                 return -ENOMEM;
335 
336         ret = comedi_pci_enable(dev);
337         if (ret)
338                 return ret;
339 
340         dev->iobase = pci_resource_start(pcidev, 1);
341         devpriv->i_IobaseAmcc = pci_resource_start(pcidev, 0);
342 
343         ao_n_chan = apci3501_eeprom_get_ao_n_chan(dev);
344 
345         if (pcidev->irq > 0) {
346                 ret = request_irq(pcidev->irq, apci3501_interrupt, IRQF_SHARED,
347                                   dev->board_name, dev);
348                 if (ret == 0)
349                         dev->irq = pcidev->irq;
350         }
351 
352         ret = comedi_alloc_subdevices(dev, 5);
353         if (ret)
354                 return ret;
355 
356         /* Initialize the analog output subdevice */
357         s = &dev->subdevices[0];
358         if (ao_n_chan) {
359                 s->type         = COMEDI_SUBD_AO;
360                 s->subdev_flags = SDF_WRITEABLE | SDF_GROUND | SDF_COMMON;
361                 s->n_chan       = ao_n_chan;
362                 s->maxdata      = 0x3fff;
363                 s->range_table  = &apci3501_ao_range;
364                 s->insn_write   = apci3501_ao_insn_write;
365                 s->insn_read    = comedi_readback_insn_read;
366 
367                 ret = comedi_alloc_subdev_readback(s);
368                 if (ret)
369                         return ret;
370         } else {
371                 s->type         = COMEDI_SUBD_UNUSED;
372         }
373 
374         /* Initialize the digital input subdevice */
375         s = &dev->subdevices[1];
376         s->type         = COMEDI_SUBD_DI;
377         s->subdev_flags = SDF_READABLE;
378         s->n_chan       = 2;
379         s->maxdata      = 1;
380         s->range_table  = &range_digital;
381         s->insn_bits    = apci3501_di_insn_bits;
382 
383         /* Initialize the digital output subdevice */
384         s = &dev->subdevices[2];
385         s->type         = COMEDI_SUBD_DO;
386         s->subdev_flags = SDF_WRITEABLE;
387         s->n_chan       = 2;
388         s->maxdata      = 1;
389         s->range_table  = &range_digital;
390         s->insn_bits    = apci3501_do_insn_bits;
391 
392         /* Initialize the timer/watchdog subdevice */
393         s = &dev->subdevices[3];
394         s->type = COMEDI_SUBD_TIMER;
395         s->subdev_flags = SDF_WRITEABLE | SDF_GROUND | SDF_COMMON;
396         s->n_chan = 1;
397         s->maxdata = 0;
398         s->len_chanlist = 1;
399         s->range_table = &range_digital;
400         s->insn_write = apci3501_write_insn_timer;
401         s->insn_read = apci3501_read_insn_timer;
402         s->insn_config = apci3501_config_insn_timer;
403 
404         /* Initialize the eeprom subdevice */
405         s = &dev->subdevices[4];
406         s->type         = COMEDI_SUBD_MEMORY;
407         s->subdev_flags = SDF_READABLE | SDF_INTERNAL;
408         s->n_chan       = 256;
409         s->maxdata      = 0xffff;
410         s->insn_read    = apci3501_eeprom_insn_read;
411 
412         apci3501_reset(dev);
413         return 0;
414 }
415 
416 static void apci3501_detach(struct comedi_device *dev)
417 {
418         if (dev->iobase)
419                 apci3501_reset(dev);
420         comedi_pci_detach(dev);
421 }
422 
423 static struct comedi_driver apci3501_driver = {
424         .driver_name    = "addi_apci_3501",
425         .module         = THIS_MODULE,
426         .auto_attach    = apci3501_auto_attach,
427         .detach         = apci3501_detach,
428 };
429 
430 static int apci3501_pci_probe(struct pci_dev *dev,
431                               const struct pci_device_id *id)
432 {
433         return comedi_pci_auto_config(dev, &apci3501_driver, id->driver_data);
434 }
435 
436 static const struct pci_device_id apci3501_pci_table[] = {
437         { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x3001) },
438         { 0 }
439 };
440 MODULE_DEVICE_TABLE(pci, apci3501_pci_table);
441 
442 static struct pci_driver apci3501_pci_driver = {
443         .name           = "addi_apci_3501",
444         .id_table       = apci3501_pci_table,
445         .probe          = apci3501_pci_probe,
446         .remove         = comedi_pci_auto_unconfig,
447 };
448 module_comedi_pci_driver(apci3501_driver, apci3501_pci_driver);
449 
450 MODULE_DESCRIPTION("ADDI-DATA APCI-3501 Analog output board");
451 MODULE_AUTHOR("Comedi http://www.comedi.org");
452 MODULE_LICENSE("GPL");
453 

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