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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 "addi_tcw.h"
 31 #include "amcc_s5933.h"
 32 
 33 /*
 34  * PCI bar 1 register I/O map
 35  */
 36 #define APCI3501_AO_CTRL_STATUS_REG             0x00
 37 #define APCI3501_AO_CTRL_BIPOLAR                BIT(0)
 38 #define APCI3501_AO_STATUS_READY                BIT(8)
 39 #define APCI3501_AO_DATA_REG                    0x04
 40 #define APCI3501_AO_DATA_CHAN(x)                ((x) << 0)
 41 #define APCI3501_AO_DATA_VAL(x)                 ((x) << 8)
 42 #define APCI3501_AO_DATA_BIPOLAR                BIT(31)
 43 #define APCI3501_AO_TRIG_SCS_REG                0x08
 44 #define APCI3501_TIMER_BASE                     0x20
 45 #define APCI3501_DO_REG                         0x40
 46 #define APCI3501_DI_REG                         0x50
 47 
 48 /*
 49  * AMCC S5933 NVRAM
 50  */
 51 #define NVRAM_USER_DATA_START   0x100
 52 
 53 #define NVCMD_BEGIN_READ        (0x7 << 5)
 54 #define NVCMD_LOAD_LOW          (0x4 << 5)
 55 #define NVCMD_LOAD_HIGH         (0x5 << 5)
 56 
 57 /*
 58  * Function types stored in the eeprom
 59  */
 60 #define EEPROM_DIGITALINPUT             0
 61 #define EEPROM_DIGITALOUTPUT            1
 62 #define EEPROM_ANALOGINPUT              2
 63 #define EEPROM_ANALOGOUTPUT             3
 64 #define EEPROM_TIMER                    4
 65 #define EEPROM_WATCHDOG                 5
 66 #define EEPROM_TIMER_WATCHDOG_COUNTER   10
 67 
 68 struct apci3501_private {
 69         unsigned long amcc;
 70         unsigned long tcw;
 71         struct task_struct *tsk_Current;
 72         unsigned char timer_mode;
 73 };
 74 
 75 static struct comedi_lrange apci3501_ao_range = {
 76         2, {
 77                 BIP_RANGE(10),
 78                 UNI_RANGE(10)
 79         }
 80 };
 81 
 82 static int apci3501_wait_for_dac(struct comedi_device *dev)
 83 {
 84         unsigned int status;
 85 
 86         do {
 87                 status = inl(dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
 88         } while (!(status & APCI3501_AO_STATUS_READY));
 89 
 90         return 0;
 91 }
 92 
 93 static int apci3501_ao_insn_write(struct comedi_device *dev,
 94                                   struct comedi_subdevice *s,
 95                                   struct comedi_insn *insn,
 96                                   unsigned int *data)
 97 {
 98         unsigned int chan = CR_CHAN(insn->chanspec);
 99         unsigned int range = CR_RANGE(insn->chanspec);
100         unsigned int cfg = APCI3501_AO_DATA_CHAN(chan);
101         int ret;
102         int i;
103 
104         /*
105          * All analog output channels have the same output range.
106          *      14-bit bipolar: 0-10V
107          *      13-bit unipolar: +/-10V
108          * Changing the range of one channel changes all of them!
109          */
110         if (range) {
111                 outl(0, dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
112         } else {
113                 cfg |= APCI3501_AO_DATA_BIPOLAR;
114                 outl(APCI3501_AO_CTRL_BIPOLAR,
115                      dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
116         }
117 
118         for (i = 0; i < insn->n; i++) {
119                 unsigned int val = data[i];
120 
121                 if (range == 1) {
122                         if (data[i] > 0x1fff) {
123                                 dev_err(dev->class_dev,
124                                         "Unipolar resolution is only 13-bits\n");
125                                 return -EINVAL;
126                         }
127                 }
128 
129                 ret = apci3501_wait_for_dac(dev);
130                 if (ret)
131                         return ret;
132 
133                 outl(cfg | APCI3501_AO_DATA_VAL(val),
134                      dev->iobase + APCI3501_AO_DATA_REG);
135 
136                 s->readback[chan] = val;
137         }
138 
139         return insn->n;
140 }
141 
142 #include "addi-data/hwdrv_apci3501.c"
143 
144 static int apci3501_di_insn_bits(struct comedi_device *dev,
145                                  struct comedi_subdevice *s,
146                                  struct comedi_insn *insn,
147                                  unsigned int *data)
148 {
149         data[1] = inl(dev->iobase + APCI3501_DI_REG) & 0x3;
150 
151         return insn->n;
152 }
153 
154 static int apci3501_do_insn_bits(struct comedi_device *dev,
155                                  struct comedi_subdevice *s,
156                                  struct comedi_insn *insn,
157                                  unsigned int *data)
158 {
159         s->state = inl(dev->iobase + APCI3501_DO_REG);
160 
161         if (comedi_dio_update_state(s, data))
162                 outl(s->state, dev->iobase + APCI3501_DO_REG);
163 
164         data[1] = s->state;
165 
166         return insn->n;
167 }
168 
169 static void apci3501_eeprom_wait(unsigned long iobase)
170 {
171         unsigned char val;
172 
173         do {
174                 val = inb(iobase + AMCC_OP_REG_MCSR_NVCMD);
175         } while (val & 0x80);
176 }
177 
178 static unsigned short apci3501_eeprom_readw(unsigned long iobase,
179                                             unsigned short addr)
180 {
181         unsigned short val = 0;
182         unsigned char tmp;
183         unsigned char i;
184 
185         /* Add the offset to the start of the user data */
186         addr += NVRAM_USER_DATA_START;
187 
188         for (i = 0; i < 2; i++) {
189                 /* Load the low 8 bit address */
190                 outb(NVCMD_LOAD_LOW, iobase + AMCC_OP_REG_MCSR_NVCMD);
191                 apci3501_eeprom_wait(iobase);
192                 outb((addr + i) & 0xff, iobase + AMCC_OP_REG_MCSR_NVDATA);
193                 apci3501_eeprom_wait(iobase);
194 
195                 /* Load the high 8 bit address */
196                 outb(NVCMD_LOAD_HIGH, iobase + AMCC_OP_REG_MCSR_NVCMD);
197                 apci3501_eeprom_wait(iobase);
198                 outb(((addr + i) >> 8) & 0xff,
199                      iobase + AMCC_OP_REG_MCSR_NVDATA);
200                 apci3501_eeprom_wait(iobase);
201 
202                 /* Read the eeprom data byte */
203                 outb(NVCMD_BEGIN_READ, iobase + AMCC_OP_REG_MCSR_NVCMD);
204                 apci3501_eeprom_wait(iobase);
205                 tmp = inb(iobase + AMCC_OP_REG_MCSR_NVDATA);
206                 apci3501_eeprom_wait(iobase);
207 
208                 if (i == 0)
209                         val |= tmp;
210                 else
211                         val |= (tmp << 8);
212         }
213 
214         return val;
215 }
216 
217 static int apci3501_eeprom_get_ao_n_chan(struct comedi_device *dev)
218 {
219         struct apci3501_private *devpriv = dev->private;
220         unsigned char nfuncs;
221         int i;
222 
223         nfuncs = apci3501_eeprom_readw(devpriv->amcc, 10) & 0xff;
224 
225         /* Read functionality details */
226         for (i = 0; i < nfuncs; i++) {
227                 unsigned short offset = i * 4;
228                 unsigned short addr;
229                 unsigned char func;
230                 unsigned short val;
231 
232                 func = apci3501_eeprom_readw(devpriv->amcc, 12 + offset) & 0x3f;
233                 addr = apci3501_eeprom_readw(devpriv->amcc, 14 + offset);
234 
235                 if (func == EEPROM_ANALOGOUTPUT) {
236                         val = apci3501_eeprom_readw(devpriv->amcc, addr + 10);
237                         return (val >> 4) & 0x3ff;
238                 }
239         }
240         return 0;
241 }
242 
243 static int apci3501_eeprom_insn_read(struct comedi_device *dev,
244                                      struct comedi_subdevice *s,
245                                      struct comedi_insn *insn,
246                                      unsigned int *data)
247 {
248         struct apci3501_private *devpriv = dev->private;
249         unsigned short addr = CR_CHAN(insn->chanspec);
250 
251         data[0] = apci3501_eeprom_readw(devpriv->amcc, 2 * addr);
252 
253         return insn->n;
254 }
255 
256 static irqreturn_t apci3501_interrupt(int irq, void *d)
257 {
258         struct comedi_device *dev = d;
259         struct apci3501_private *devpriv = dev->private;
260         unsigned int status;
261         unsigned int ctrl;
262 
263         /*  Disable Interrupt */
264         ctrl = inl(devpriv->tcw + ADDI_TCW_CTRL_REG);
265         ctrl &= ~(ADDI_TCW_CTRL_GATE | ADDI_TCW_CTRL_TRIG |
266                   ADDI_TCW_CTRL_IRQ_ENA);
267         outl(ctrl, devpriv->tcw + ADDI_TCW_CTRL_REG);
268 
269         status = inl(devpriv->tcw + ADDI_TCW_IRQ_REG);
270         if (!(status & ADDI_TCW_IRQ)) {
271                 dev_err(dev->class_dev, "IRQ from unknown source\n");
272                 return IRQ_NONE;
273         }
274 
275         /* Enable Interrupt Send a signal to from kernel to user space */
276         send_sig(SIGIO, devpriv->tsk_Current, 0);
277         ctrl = inl(devpriv->tcw + ADDI_TCW_CTRL_REG);
278         ctrl &= ~(ADDI_TCW_CTRL_GATE | ADDI_TCW_CTRL_TRIG |
279                   ADDI_TCW_CTRL_IRQ_ENA);
280         ctrl |= ADDI_TCW_CTRL_IRQ_ENA;
281         outl(ctrl, devpriv->tcw + ADDI_TCW_CTRL_REG);
282         inl(devpriv->tcw + ADDI_TCW_STATUS_REG);
283 
284         return IRQ_HANDLED;
285 }
286 
287 static int apci3501_reset(struct comedi_device *dev)
288 {
289         unsigned int val;
290         int chan;
291         int ret;
292 
293         /* Reset all digital outputs to "" */
294         outl(0x0, dev->iobase + APCI3501_DO_REG);
295 
296         /* Default all analog outputs to 0V (bipolar) */
297         outl(APCI3501_AO_CTRL_BIPOLAR,
298              dev->iobase + APCI3501_AO_CTRL_STATUS_REG);
299         val = APCI3501_AO_DATA_BIPOLAR | APCI3501_AO_DATA_VAL(0);
300 
301         /* Set all analog output channels */
302         for (chan = 0; chan < 8; chan++) {
303                 ret = apci3501_wait_for_dac(dev);
304                 if (ret) {
305                         dev_warn(dev->class_dev,
306                                  "%s: DAC not-ready for channel %i\n",
307                                  __func__, chan);
308                 } else {
309                         outl(val | APCI3501_AO_DATA_CHAN(chan),
310                              dev->iobase + APCI3501_AO_DATA_REG);
311                 }
312         }
313 
314         return 0;
315 }
316 
317 static int apci3501_auto_attach(struct comedi_device *dev,
318                                 unsigned long context_unused)
319 {
320         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
321         struct apci3501_private *devpriv;
322         struct comedi_subdevice *s;
323         int ao_n_chan;
324         int ret;
325 
326         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
327         if (!devpriv)
328                 return -ENOMEM;
329 
330         ret = comedi_pci_enable(dev);
331         if (ret)
332                 return ret;
333 
334         devpriv->amcc = pci_resource_start(pcidev, 0);
335         dev->iobase = pci_resource_start(pcidev, 1);
336         devpriv->tcw = dev->iobase + APCI3501_TIMER_BASE;
337 
338         ao_n_chan = apci3501_eeprom_get_ao_n_chan(dev);
339 
340         if (pcidev->irq > 0) {
341                 ret = request_irq(pcidev->irq, apci3501_interrupt, IRQF_SHARED,
342                                   dev->board_name, dev);
343                 if (ret == 0)
344                         dev->irq = pcidev->irq;
345         }
346 
347         ret = comedi_alloc_subdevices(dev, 5);
348         if (ret)
349                 return ret;
350 
351         /* Initialize the analog output subdevice */
352         s = &dev->subdevices[0];
353         if (ao_n_chan) {
354                 s->type         = COMEDI_SUBD_AO;
355                 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
356                 s->n_chan       = ao_n_chan;
357                 s->maxdata      = 0x3fff;
358                 s->range_table  = &apci3501_ao_range;
359                 s->insn_write   = apci3501_ao_insn_write;
360 
361                 ret = comedi_alloc_subdev_readback(s);
362                 if (ret)
363                         return ret;
364         } else {
365                 s->type         = COMEDI_SUBD_UNUSED;
366         }
367 
368         /* Initialize the digital input subdevice */
369         s = &dev->subdevices[1];
370         s->type         = COMEDI_SUBD_DI;
371         s->subdev_flags = SDF_READABLE;
372         s->n_chan       = 2;
373         s->maxdata      = 1;
374         s->range_table  = &range_digital;
375         s->insn_bits    = apci3501_di_insn_bits;
376 
377         /* Initialize the digital output subdevice */
378         s = &dev->subdevices[2];
379         s->type         = COMEDI_SUBD_DO;
380         s->subdev_flags = SDF_WRITABLE;
381         s->n_chan       = 2;
382         s->maxdata      = 1;
383         s->range_table  = &range_digital;
384         s->insn_bits    = apci3501_do_insn_bits;
385 
386         /* Initialize the timer/watchdog subdevice */
387         s = &dev->subdevices[3];
388         s->type = COMEDI_SUBD_TIMER;
389         s->subdev_flags = SDF_WRITABLE;
390         s->n_chan = 1;
391         s->maxdata = 0;
392         s->len_chanlist = 1;
393         s->range_table = &range_digital;
394         s->insn_write = apci3501_write_insn_timer;
395         s->insn_read = apci3501_read_insn_timer;
396         s->insn_config = apci3501_config_insn_timer;
397 
398         /* Initialize the eeprom subdevice */
399         s = &dev->subdevices[4];
400         s->type         = COMEDI_SUBD_MEMORY;
401         s->subdev_flags = SDF_READABLE | SDF_INTERNAL;
402         s->n_chan       = 256;
403         s->maxdata      = 0xffff;
404         s->insn_read    = apci3501_eeprom_insn_read;
405 
406         apci3501_reset(dev);
407         return 0;
408 }
409 
410 static void apci3501_detach(struct comedi_device *dev)
411 {
412         if (dev->iobase)
413                 apci3501_reset(dev);
414         comedi_pci_detach(dev);
415 }
416 
417 static struct comedi_driver apci3501_driver = {
418         .driver_name    = "addi_apci_3501",
419         .module         = THIS_MODULE,
420         .auto_attach    = apci3501_auto_attach,
421         .detach         = apci3501_detach,
422 };
423 
424 static int apci3501_pci_probe(struct pci_dev *dev,
425                               const struct pci_device_id *id)
426 {
427         return comedi_pci_auto_config(dev, &apci3501_driver, id->driver_data);
428 }
429 
430 static const struct pci_device_id apci3501_pci_table[] = {
431         { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x3001) },
432         { 0 }
433 };
434 MODULE_DEVICE_TABLE(pci, apci3501_pci_table);
435 
436 static struct pci_driver apci3501_pci_driver = {
437         .name           = "addi_apci_3501",
438         .id_table       = apci3501_pci_table,
439         .probe          = apci3501_pci_probe,
440         .remove         = comedi_pci_auto_unconfig,
441 };
442 module_comedi_pci_driver(apci3501_driver, apci3501_pci_driver);
443 
444 MODULE_DESCRIPTION("ADDI-DATA APCI-3501 Analog output board");
445 MODULE_AUTHOR("Comedi http://www.comedi.org");
446 MODULE_LICENSE("GPL");
447 

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