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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/interrupt.h>
 27 #include <linux/sched.h>
 28 
 29 #include "../comedi_pci.h"
 30 #include "amcc_s5933.h"
 31 
 32 /*
 33  * PCI bar 1 register I/O map
 34  */
 35 #define APCI3501_AO_CTRL_STATUS_REG             0x00
 36 #define APCI3501_AO_CTRL_BIPOLAR                (1 << 0)
 37 #define APCI3501_AO_STATUS_READY                (1 << 8)
 38 #define APCI3501_AO_DATA_REG                    0x04
 39 #define APCI3501_AO_DATA_CHAN(x)                ((x) << 0)
 40 #define APCI3501_AO_DATA_VAL(x)                 ((x) << 8)
 41 #define APCI3501_AO_DATA_BIPOLAR                (1 << 31)
 42 #define APCI3501_AO_TRIG_SCS_REG                0x08
 43 #define APCI3501_TIMER_SYNC_REG                 0x20
 44 #define APCI3501_TIMER_RELOAD_REG               0x24
 45 #define APCI3501_TIMER_TIMEBASE_REG             0x28
 46 #define APCI3501_TIMER_CTRL_REG                 0x2c
 47 #define APCI3501_TIMER_STATUS_REG               0x30
 48 #define APCI3501_TIMER_IRQ_REG                  0x34
 49 #define APCI3501_TIMER_WARN_RELOAD_REG          0x38
 50 #define APCI3501_TIMER_WARN_TIMEBASE_REG        0x3c
 51 #define APCI3501_DO_REG                         0x40
 52 #define APCI3501_DI_REG                         0x50
 53 
 54 /*
 55  * AMCC S5933 NVRAM
 56  */
 57 #define NVRAM_USER_DATA_START   0x100
 58 
 59 #define NVCMD_BEGIN_READ        (0x7 << 5)
 60 #define NVCMD_LOAD_LOW          (0x4 << 5)
 61 #define NVCMD_LOAD_HIGH         (0x5 << 5)
 62 
 63 /*
 64  * Function types stored in the eeprom
 65  */
 66 #define EEPROM_DIGITALINPUT             0
 67 #define EEPROM_DIGITALOUTPUT            1
 68 #define EEPROM_ANALOGINPUT              2
 69 #define EEPROM_ANALOGOUTPUT             3
 70 #define EEPROM_TIMER                    4
 71 #define EEPROM_WATCHDOG                 5
 72 #define EEPROM_TIMER_WATCHDOG_COUNTER   10
 73 
 74 struct apci3501_private {
 75         int i_IobaseAmcc;
 76         struct task_struct *tsk_Current;
 77         unsigned char b_TimerSelectMode;
 78 };
 79 
 80 static struct comedi_lrange apci3501_ao_range = {
 81         2, {
 82                 BIP_RANGE(10),
 83                 UNI_RANGE(10)
 84         }
 85 };
 86 
 87 static int apci3501_wait_for_dac(struct comedi_device *dev)
 88 {
 89         unsigned int status;
 90 
 91         do {
 92                 status = inl(dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
 93         } while (!(status & APCI3501_AO_STATUS_READY));
 94 
 95         return 0;
 96 }
 97 
 98 static int apci3501_ao_insn_write(struct comedi_device *dev,
 99                                   struct comedi_subdevice *s,
100                                   struct comedi_insn *insn,
101                                   unsigned int *data)
102 {
103         unsigned int chan = CR_CHAN(insn->chanspec);
104         unsigned int range = CR_RANGE(insn->chanspec);
105         unsigned int cfg = APCI3501_AO_DATA_CHAN(chan);
106         int ret;
107         int i;
108 
109         /*
110          * All analog output channels have the same output range.
111          *      14-bit bipolar: 0-10V
112          *      13-bit unipolar: +/-10V
113          * Changing the range of one channel changes all of them!
114          */
115         if (range) {
116                 outl(0, dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
117         } else {
118                 cfg |= APCI3501_AO_DATA_BIPOLAR;
119                 outl(APCI3501_AO_CTRL_BIPOLAR,
120                      dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
121         }
122 
123         for (i = 0; i < insn->n; i++) {
124                 unsigned int val = data[i];
125 
126                 if (range == 1) {
127                         if (data[i] > 0x1fff) {
128                                 dev_err(dev->class_dev,
129                                         "Unipolar resolution is only 13-bits\n");
130                                 return -EINVAL;
131                         }
132                 }
133 
134                 ret = apci3501_wait_for_dac(dev);
135                 if (ret)
136                         return ret;
137 
138                 outl(cfg | APCI3501_AO_DATA_VAL(val),
139                      dev->iobase + APCI3501_AO_DATA_REG);
140 
141                 s->readback[chan] = val;
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 
269         /*  Disable Interrupt */
270         ul_Command1 = inl(dev->iobase + APCI3501_TIMER_CTRL_REG);
271         ul_Command1 = ul_Command1 & 0xFFFFF9FDul;
272         outl(ul_Command1, dev->iobase + APCI3501_TIMER_CTRL_REG);
273 
274         ui_Timer_AOWatchdog = inl(dev->iobase + APCI3501_TIMER_IRQ_REG) & 0x1;
275         if ((!ui_Timer_AOWatchdog)) {
276                 dev_err(dev->class_dev, "IRQ from unknown source\n");
277                 return IRQ_NONE;
278         }
279 
280         /* Enable Interrupt Send a signal to from kernel to user space */
281         send_sig(SIGIO, devpriv->tsk_Current, 0);
282         ul_Command1 = inl(dev->iobase + APCI3501_TIMER_CTRL_REG);
283         ul_Command1 = (ul_Command1 & 0xFFFFF9FDul) | 1 << 1;
284         outl(ul_Command1, dev->iobase + APCI3501_TIMER_CTRL_REG);
285         inl(dev->iobase + APCI3501_TIMER_STATUS_REG);
286 
287         return IRQ_HANDLED;
288 }
289 
290 static int apci3501_reset(struct comedi_device *dev)
291 {
292         unsigned int val;
293         int chan;
294         int ret;
295 
296         /* Reset all digital outputs to "" */
297         outl(0x0, dev->iobase + APCI3501_DO_REG);
298 
299         /* Default all analog outputs to 0V (bipolar) */
300         outl(APCI3501_AO_CTRL_BIPOLAR,
301              dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
302         val = APCI3501_AO_DATA_BIPOLAR | APCI3501_AO_DATA_VAL(0);
303 
304         /* Set all analog output channels */
305         for (chan = 0; chan < 8; chan++) {
306                 ret = apci3501_wait_for_dac(dev);
307                 if (ret) {
308                         dev_warn(dev->class_dev,
309                                  "%s: DAC not-ready for channel %i\n",
310                                  __func__, chan);
311                 } else {
312                         outl(val | APCI3501_AO_DATA_CHAN(chan),
313                              dev->iobase + APCI3501_AO_DATA_REG);
314                 }
315         }
316 
317         return 0;
318 }
319 
320 static int apci3501_auto_attach(struct comedi_device *dev,
321                                 unsigned long context_unused)
322 {
323         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
324         struct apci3501_private *devpriv;
325         struct comedi_subdevice *s;
326         int ao_n_chan;
327         int ret;
328 
329         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
330         if (!devpriv)
331                 return -ENOMEM;
332 
333         ret = comedi_pci_enable(dev);
334         if (ret)
335                 return ret;
336 
337         dev->iobase = pci_resource_start(pcidev, 1);
338         devpriv->i_IobaseAmcc = pci_resource_start(pcidev, 0);
339 
340         ao_n_chan = apci3501_eeprom_get_ao_n_chan(dev);
341 
342         if (pcidev->irq > 0) {
343                 ret = request_irq(pcidev->irq, apci3501_interrupt, IRQF_SHARED,
344                                   dev->board_name, dev);
345                 if (ret == 0)
346                         dev->irq = pcidev->irq;
347         }
348 
349         ret = comedi_alloc_subdevices(dev, 5);
350         if (ret)
351                 return ret;
352 
353         /* Initialize the analog output subdevice */
354         s = &dev->subdevices[0];
355         if (ao_n_chan) {
356                 s->type         = COMEDI_SUBD_AO;
357                 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
358                 s->n_chan       = ao_n_chan;
359                 s->maxdata      = 0x3fff;
360                 s->range_table  = &apci3501_ao_range;
361                 s->insn_write   = apci3501_ao_insn_write;
362 
363                 ret = comedi_alloc_subdev_readback(s);
364                 if (ret)
365                         return ret;
366         } else {
367                 s->type         = COMEDI_SUBD_UNUSED;
368         }
369 
370         /* Initialize the digital input subdevice */
371         s = &dev->subdevices[1];
372         s->type         = COMEDI_SUBD_DI;
373         s->subdev_flags = SDF_READABLE;
374         s->n_chan       = 2;
375         s->maxdata      = 1;
376         s->range_table  = &range_digital;
377         s->insn_bits    = apci3501_di_insn_bits;
378 
379         /* Initialize the digital output subdevice */
380         s = &dev->subdevices[2];
381         s->type         = COMEDI_SUBD_DO;
382         s->subdev_flags = SDF_WRITABLE;
383         s->n_chan       = 2;
384         s->maxdata      = 1;
385         s->range_table  = &range_digital;
386         s->insn_bits    = apci3501_do_insn_bits;
387 
388         /* Initialize the timer/watchdog subdevice */
389         s = &dev->subdevices[3];
390         s->type = COMEDI_SUBD_TIMER;
391         s->subdev_flags = SDF_WRITABLE;
392         s->n_chan = 1;
393         s->maxdata = 0;
394         s->len_chanlist = 1;
395         s->range_table = &range_digital;
396         s->insn_write = apci3501_write_insn_timer;
397         s->insn_read = apci3501_read_insn_timer;
398         s->insn_config = apci3501_config_insn_timer;
399 
400         /* Initialize the eeprom subdevice */
401         s = &dev->subdevices[4];
402         s->type         = COMEDI_SUBD_MEMORY;
403         s->subdev_flags = SDF_READABLE | SDF_INTERNAL;
404         s->n_chan       = 256;
405         s->maxdata      = 0xffff;
406         s->insn_read    = apci3501_eeprom_insn_read;
407 
408         apci3501_reset(dev);
409         return 0;
410 }
411 
412 static void apci3501_detach(struct comedi_device *dev)
413 {
414         if (dev->iobase)
415                 apci3501_reset(dev);
416         comedi_pci_detach(dev);
417 }
418 
419 static struct comedi_driver apci3501_driver = {
420         .driver_name    = "addi_apci_3501",
421         .module         = THIS_MODULE,
422         .auto_attach    = apci3501_auto_attach,
423         .detach         = apci3501_detach,
424 };
425 
426 static int apci3501_pci_probe(struct pci_dev *dev,
427                               const struct pci_device_id *id)
428 {
429         return comedi_pci_auto_config(dev, &apci3501_driver, id->driver_data);
430 }
431 
432 static const struct pci_device_id apci3501_pci_table[] = {
433         { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x3001) },
434         { 0 }
435 };
436 MODULE_DEVICE_TABLE(pci, apci3501_pci_table);
437 
438 static struct pci_driver apci3501_pci_driver = {
439         .name           = "addi_apci_3501",
440         .id_table       = apci3501_pci_table,
441         .probe          = apci3501_pci_probe,
442         .remove         = comedi_pci_auto_unconfig,
443 };
444 module_comedi_pci_driver(apci3501_driver, apci3501_pci_driver);
445 
446 MODULE_DESCRIPTION("ADDI-DATA APCI-3501 Analog output board");
447 MODULE_AUTHOR("Comedi http://www.comedi.org");
448 MODULE_LICENSE("GPL");
449 

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