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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 val = 0;
108         int i;
109         int ret;
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                 val |= APCI3501_AO_DATA_BIPOLAR;
121                 outl(APCI3501_AO_CTRL_BIPOLAR,
122                      dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
123         }
124 
125         val |= APCI3501_AO_DATA_CHAN(chan);
126 
127         for (i = 0; i < insn->n; i++) {
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(val | APCI3501_AO_DATA_VAL(data[i]),
141                      dev->iobase + APCI3501_AO_DATA_REG);
142         }
143 
144         return insn->n;
145 }
146 
147 #include "addi-data/hwdrv_apci3501.c"
148 
149 static int apci3501_di_insn_bits(struct comedi_device *dev,
150                                  struct comedi_subdevice *s,
151                                  struct comedi_insn *insn,
152                                  unsigned int *data)
153 {
154         data[1] = inl(dev->iobase + APCI3501_DI_REG) & 0x3;
155 
156         return insn->n;
157 }
158 
159 static int apci3501_do_insn_bits(struct comedi_device *dev,
160                                  struct comedi_subdevice *s,
161                                  struct comedi_insn *insn,
162                                  unsigned int *data)
163 {
164         s->state = inl(dev->iobase + APCI3501_DO_REG);
165 
166         if (comedi_dio_update_state(s, data))
167                 outl(s->state, dev->iobase + APCI3501_DO_REG);
168 
169         data[1] = s->state;
170 
171         return insn->n;
172 }
173 
174 static void apci3501_eeprom_wait(unsigned long iobase)
175 {
176         unsigned char val;
177 
178         do {
179                 val = inb(iobase + AMCC_OP_REG_MCSR_NVCMD);
180         } while (val & 0x80);
181 }
182 
183 static unsigned short apci3501_eeprom_readw(unsigned long iobase,
184                                             unsigned short addr)
185 {
186         unsigned short val = 0;
187         unsigned char tmp;
188         unsigned char i;
189 
190         /* Add the offset to the start of the user data */
191         addr += NVRAM_USER_DATA_START;
192 
193         for (i = 0; i < 2; i++) {
194                 /* Load the low 8 bit address */
195                 outb(NVCMD_LOAD_LOW, iobase + AMCC_OP_REG_MCSR_NVCMD);
196                 apci3501_eeprom_wait(iobase);
197                 outb((addr + i) & 0xff, iobase + AMCC_OP_REG_MCSR_NVDATA);
198                 apci3501_eeprom_wait(iobase);
199 
200                 /* Load the high 8 bit address */
201                 outb(NVCMD_LOAD_HIGH, iobase + AMCC_OP_REG_MCSR_NVCMD);
202                 apci3501_eeprom_wait(iobase);
203                 outb(((addr + i) >> 8) & 0xff,
204                         iobase + AMCC_OP_REG_MCSR_NVDATA);
205                 apci3501_eeprom_wait(iobase);
206 
207                 /* Read the eeprom data byte */
208                 outb(NVCMD_BEGIN_READ, iobase + AMCC_OP_REG_MCSR_NVCMD);
209                 apci3501_eeprom_wait(iobase);
210                 tmp = inb(iobase + AMCC_OP_REG_MCSR_NVDATA);
211                 apci3501_eeprom_wait(iobase);
212 
213                 if (i == 0)
214                         val |= tmp;
215                 else
216                         val |= (tmp << 8);
217         }
218 
219         return val;
220 }
221 
222 static int apci3501_eeprom_get_ao_n_chan(struct comedi_device *dev)
223 {
224         struct apci3501_private *devpriv = dev->private;
225         unsigned long iobase = devpriv->i_IobaseAmcc;
226         unsigned char nfuncs;
227         int i;
228 
229         nfuncs = apci3501_eeprom_readw(iobase, 10) & 0xff;
230 
231         /* Read functionality details */
232         for (i = 0; i < nfuncs; i++) {
233                 unsigned short offset = i * 4;
234                 unsigned short addr;
235                 unsigned char func;
236                 unsigned short val;
237 
238                 func = apci3501_eeprom_readw(iobase, 12 + offset) & 0x3f;
239                 addr = apci3501_eeprom_readw(iobase, 14 + offset);
240 
241                 if (func == EEPROM_ANALOGOUTPUT) {
242                         val = apci3501_eeprom_readw(iobase, addr + 10);
243                         return (val >> 4) & 0x3ff;
244                 }
245         }
246         return 0;
247 }
248 
249 static int apci3501_eeprom_insn_read(struct comedi_device *dev,
250                                      struct comedi_subdevice *s,
251                                      struct comedi_insn *insn,
252                                      unsigned int *data)
253 {
254         struct apci3501_private *devpriv = dev->private;
255         unsigned short addr = CR_CHAN(insn->chanspec);
256 
257         data[0] = apci3501_eeprom_readw(devpriv->i_IobaseAmcc, 2 * addr);
258 
259         return insn->n;
260 }
261 
262 static irqreturn_t apci3501_interrupt(int irq, void *d)
263 {
264         struct comedi_device *dev = d;
265         struct apci3501_private *devpriv = dev->private;
266         unsigned int ui_Timer_AOWatchdog;
267         unsigned long ul_Command1;
268         int i_temp;
269 
270         /*  Disable Interrupt */
271         ul_Command1 = inl(dev->iobase + APCI3501_TIMER_CTRL_REG);
272         ul_Command1 = (ul_Command1 & 0xFFFFF9FDul);
273         outl(ul_Command1, dev->iobase + APCI3501_TIMER_CTRL_REG);
274 
275         ui_Timer_AOWatchdog = inl(dev->iobase + APCI3501_TIMER_IRQ_REG) & 0x1;
276         if ((!ui_Timer_AOWatchdog)) {
277                 comedi_error(dev, "IRQ from unknown source");
278                 return IRQ_NONE;
279         }
280 
281         /* Enable Interrupt Send a signal to from kernel to user space */
282         send_sig(SIGIO, devpriv->tsk_Current, 0);
283         ul_Command1 = inl(dev->iobase + APCI3501_TIMER_CTRL_REG);
284         ul_Command1 = ((ul_Command1 & 0xFFFFF9FDul) | 1 << 1);
285         outl(ul_Command1, dev->iobase + APCI3501_TIMER_CTRL_REG);
286         i_temp = inl(dev->iobase + APCI3501_TIMER_STATUS_REG) & 0x1;
287 
288         return IRQ_HANDLED;
289 }
290 
291 static int apci3501_reset(struct comedi_device *dev)
292 {
293         unsigned int val;
294         int chan;
295         int ret;
296 
297         /* Reset all digital outputs to "" */
298         outl(0x0, dev->iobase + APCI3501_DO_REG);
299 
300         /* Default all analog outputs to 0V (bipolar) */
301         outl(APCI3501_AO_CTRL_BIPOLAR,
302              dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
303         val = APCI3501_AO_DATA_BIPOLAR | APCI3501_AO_DATA_VAL(0);
304 
305         /* Set all analog output channels */
306         for (chan = 0; chan < 8; chan++) {
307                 ret = apci3501_wait_for_dac(dev);
308                 if (ret) {
309                         dev_warn(dev->class_dev,
310                                  "%s: DAC not-ready for channel %i\n",
311                                  __func__, chan);
312                 } else {
313                         outl(val | APCI3501_AO_DATA_CHAN(chan),
314                              dev->iobase + APCI3501_AO_DATA_REG);
315                 }
316         }
317 
318         return 0;
319 }
320 
321 static int apci3501_auto_attach(struct comedi_device *dev,
322                                 unsigned long context_unused)
323 {
324         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
325         struct apci3501_private *devpriv;
326         struct comedi_subdevice *s;
327         int ao_n_chan;
328         int ret;
329 
330         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
331         if (!devpriv)
332                 return -ENOMEM;
333 
334         ret = comedi_pci_enable(dev);
335         if (ret)
336                 return ret;
337 
338         dev->iobase = pci_resource_start(pcidev, 1);
339         devpriv->i_IobaseAmcc = pci_resource_start(pcidev, 0);
340 
341         ao_n_chan = apci3501_eeprom_get_ao_n_chan(dev);
342 
343         if (pcidev->irq > 0) {
344                 ret = request_irq(pcidev->irq, apci3501_interrupt, IRQF_SHARED,
345                                   dev->board_name, dev);
346                 if (ret == 0)
347                         dev->irq = pcidev->irq;
348         }
349 
350         ret = comedi_alloc_subdevices(dev, 5);
351         if (ret)
352                 return ret;
353 
354         /* Initialize the analog output subdevice */
355         s = &dev->subdevices[0];
356         if (ao_n_chan) {
357                 s->type         = COMEDI_SUBD_AO;
358                 s->subdev_flags = SDF_WRITEABLE | SDF_GROUND | SDF_COMMON;
359                 s->n_chan       = ao_n_chan;
360                 s->maxdata      = 0x3fff;
361                 s->range_table  = &apci3501_ao_range;
362                 s->insn_write   = apci3501_ao_insn_write;
363         } else {
364                 s->type         = COMEDI_SUBD_UNUSED;
365         }
366 
367         /* Initialize the digital input subdevice */
368         s = &dev->subdevices[1];
369         s->type         = COMEDI_SUBD_DI;
370         s->subdev_flags = SDF_READABLE;
371         s->n_chan       = 2;
372         s->maxdata      = 1;
373         s->range_table  = &range_digital;
374         s->insn_bits    = apci3501_di_insn_bits;
375 
376         /* Initialize the digital output subdevice */
377         s = &dev->subdevices[2];
378         s->type         = COMEDI_SUBD_DO;
379         s->subdev_flags = SDF_WRITEABLE;
380         s->n_chan       = 2;
381         s->maxdata      = 1;
382         s->range_table  = &range_digital;
383         s->insn_bits    = apci3501_do_insn_bits;
384 
385         /* Initialize the timer/watchdog subdevice */
386         s = &dev->subdevices[3];
387         s->type = COMEDI_SUBD_TIMER;
388         s->subdev_flags = SDF_WRITEABLE | SDF_GROUND | SDF_COMMON;
389         s->n_chan = 1;
390         s->maxdata = 0;
391         s->len_chanlist = 1;
392         s->range_table = &range_digital;
393         s->insn_write = apci3501_write_insn_timer;
394         s->insn_read = apci3501_read_insn_timer;
395         s->insn_config = apci3501_config_insn_timer;
396 
397         /* Initialize the eeprom subdevice */
398         s = &dev->subdevices[4];
399         s->type         = COMEDI_SUBD_MEMORY;
400         s->subdev_flags = SDF_READABLE | SDF_INTERNAL;
401         s->n_chan       = 256;
402         s->maxdata      = 0xffff;
403         s->insn_read    = apci3501_eeprom_insn_read;
404 
405         apci3501_reset(dev);
406         return 0;
407 }
408 
409 static void apci3501_detach(struct comedi_device *dev)
410 {
411         if (dev->iobase)
412                 apci3501_reset(dev);
413         if (dev->irq)
414                 free_irq(dev->irq, dev);
415         comedi_pci_disable(dev);
416 }
417 
418 static struct comedi_driver apci3501_driver = {
419         .driver_name    = "addi_apci_3501",
420         .module         = THIS_MODULE,
421         .auto_attach    = apci3501_auto_attach,
422         .detach         = apci3501_detach,
423 };
424 
425 static int apci3501_pci_probe(struct pci_dev *dev,
426                               const struct pci_device_id *id)
427 {
428         return comedi_pci_auto_config(dev, &apci3501_driver, id->driver_data);
429 }
430 
431 static const struct pci_device_id apci3501_pci_table[] = {
432         { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x3001) },
433         { 0 }
434 };
435 MODULE_DEVICE_TABLE(pci, apci3501_pci_table);
436 
437 static struct pci_driver apci3501_pci_driver = {
438         .name           = "addi_apci_3501",
439         .id_table       = apci3501_pci_table,
440         .probe          = apci3501_pci_probe,
441         .remove         = comedi_pci_auto_unconfig,
442 };
443 module_comedi_pci_driver(apci3501_driver, apci3501_pci_driver);
444 
445 MODULE_DESCRIPTION("ADDI-DATA APCI-3501 Analog output board");
446 MODULE_AUTHOR("Comedi http://www.comedi.org");
447 MODULE_LICENSE("GPL");
448 

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