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vxp_ops.c
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1 /*
2  * Driver for Digigram VXpocket soundcards
3  *
4  * lowlevel routines for VXpocket soundcards
5  *
6  * Copyright (c) 2002 by Takashi Iwai <[email protected]>
7  *
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.
12  *
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.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  */
22 
23 #include <linux/delay.h>
24 #include <linux/device.h>
25 #include <linux/firmware.h>
26 #include <linux/io.h>
27 #include <sound/core.h>
28 #include "vxpocket.h"
29 
30 
31 static int vxp_reg_offset[VX_REG_MAX] = {
32  [VX_ICR] = 0x00, // ICR
33  [VX_CVR] = 0x01, // CVR
34  [VX_ISR] = 0x02, // ISR
35  [VX_IVR] = 0x03, // IVR
36  [VX_RXH] = 0x05, // RXH
37  [VX_RXM] = 0x06, // RXM
38  [VX_RXL] = 0x07, // RXL
39  [VX_DMA] = 0x04, // DMA
40  [VX_CDSP] = 0x08, // CDSP
41  [VX_LOFREQ] = 0x09, // LFREQ
42  [VX_HIFREQ] = 0x0a, // HFREQ
43  [VX_DATA] = 0x0b, // DATA
44  [VX_MICRO] = 0x0c, // MICRO
45  [VX_DIALOG] = 0x0d, // DIALOG
46  [VX_CSUER] = 0x0e, // CSUER
47  [VX_RUER] = 0x0f, // RUER
48 };
49 
50 
51 static inline unsigned long vxp_reg_addr(struct vx_core *_chip, int reg)
52 {
53  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
54  return chip->port + vxp_reg_offset[reg];
55 }
56 
57 /*
58  * snd_vx_inb - read a byte from the register
59  * @offset: register offset
60  */
61 static unsigned char vxp_inb(struct vx_core *chip, int offset)
62 {
63  return inb(vxp_reg_addr(chip, offset));
64 }
65 
66 /*
67  * snd_vx_outb - write a byte on the register
68  * @offset: the register offset
69  * @val: the value to write
70  */
71 static void vxp_outb(struct vx_core *chip, int offset, unsigned char val)
72 {
73  outb(val, vxp_reg_addr(chip, offset));
74 }
75 
76 /*
77  * redefine macros to call directly
78  */
79 #undef vx_inb
80 #define vx_inb(chip,reg) vxp_inb((struct vx_core *)(chip), VX_##reg)
81 #undef vx_outb
82 #define vx_outb(chip,reg,val) vxp_outb((struct vx_core *)(chip), VX_##reg,val)
83 
84 
85 /*
86  * vx_check_magic - check the magic word on xilinx
87  *
88  * returns zero if a magic word is detected, or a negative error code.
89  */
90 static int vx_check_magic(struct vx_core *chip)
91 {
92  unsigned long end_time = jiffies + HZ / 5;
93  int c;
94  do {
95  c = vx_inb(chip, CDSP);
96  if (c == CDSP_MAGIC)
97  return 0;
98  msleep(10);
99  } while (time_after_eq(end_time, jiffies));
100  snd_printk(KERN_ERR "cannot find xilinx magic word (%x)\n", c);
101  return -EIO;
102 }
103 
104 
105 /*
106  * vx_reset_dsp - reset the DSP
107  */
108 
109 #define XX_DSP_RESET_WAIT_TIME 2 /* ms */
110 
111 static void vxp_reset_dsp(struct vx_core *_chip)
112 {
113  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
114 
115  /* set the reset dsp bit to 1 */
116  vx_outb(chip, CDSP, chip->regCDSP | VXP_CDSP_DSP_RESET_MASK);
117  vx_inb(chip, CDSP);
119  /* reset the bit */
121  vx_outb(chip, CDSP, chip->regCDSP);
122  vx_inb(chip, CDSP);
124 }
125 
126 /*
127  * reset codec bit
128  */
129 static void vxp_reset_codec(struct vx_core *_chip)
130 {
131  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
132 
133  /* Set the reset CODEC bit to 1. */
134  vx_outb(chip, CDSP, chip->regCDSP | VXP_CDSP_CODEC_RESET_MASK);
135  vx_inb(chip, CDSP);
136  msleep(10);
137  /* Set the reset CODEC bit to 0. */
139  vx_outb(chip, CDSP, chip->regCDSP);
140  vx_inb(chip, CDSP);
141  msleep(1);
142 }
143 
144 /*
145  * vx_load_xilinx_binary - load the xilinx binary image
146  * the binary image is the binary array converted from the bitstream file.
147  */
148 static int vxp_load_xilinx_binary(struct vx_core *_chip, const struct firmware *fw)
149 {
150  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
151  unsigned int i;
152  int c;
153  int regCSUER, regRUER;
154  const unsigned char *image;
155  unsigned char data;
156 
157  /* Switch to programmation mode */
159  vx_outb(chip, DIALOG, chip->regDIALOG);
160 
161  /* Save register CSUER and RUER */
162  regCSUER = vx_inb(chip, CSUER);
163  regRUER = vx_inb(chip, RUER);
164 
165  /* reset HF0 and HF1 */
166  vx_outb(chip, ICR, 0);
167 
168  /* Wait for answer HF2 equal to 1 */
169  snd_printdd(KERN_DEBUG "check ISR_HF2\n");
170  if (vx_check_isr(_chip, ISR_HF2, ISR_HF2, 20) < 0)
171  goto _error;
172 
173  /* set HF1 for loading xilinx binary */
174  vx_outb(chip, ICR, ICR_HF1);
175  image = fw->data;
176  for (i = 0; i < fw->size; i++, image++) {
177  data = *image;
178  if (vx_wait_isr_bit(_chip, ISR_TX_EMPTY) < 0)
179  goto _error;
180  vx_outb(chip, TXL, data);
181  /* wait for reading */
182  if (vx_wait_for_rx_full(_chip) < 0)
183  goto _error;
184  c = vx_inb(chip, RXL);
185  if (c != (int)data)
186  snd_printk(KERN_ERR "vxpocket: load xilinx mismatch at %d: 0x%x != 0x%x\n", i, c, (int)data);
187  }
188 
189  /* reset HF1 */
190  vx_outb(chip, ICR, 0);
191 
192  /* wait for HF3 */
193  if (vx_check_isr(_chip, ISR_HF3, ISR_HF3, 20) < 0)
194  goto _error;
195 
196  /* read the number of bytes received */
197  if (vx_wait_for_rx_full(_chip) < 0)
198  goto _error;
199 
200  c = (int)vx_inb(chip, RXH) << 16;
201  c |= (int)vx_inb(chip, RXM) << 8;
202  c |= vx_inb(chip, RXL);
203 
204  snd_printdd(KERN_DEBUG "xilinx: dsp size received 0x%x, orig 0x%Zx\n", c, fw->size);
205 
206  vx_outb(chip, ICR, ICR_HF0);
207 
208  /* TEMPO 250ms : wait until Xilinx is downloaded */
209  msleep(300);
210 
211  /* test magical word */
212  if (vx_check_magic(_chip) < 0)
213  goto _error;
214 
215  /* Restore register 0x0E and 0x0F (thus replacing COR and FCSR) */
216  vx_outb(chip, CSUER, regCSUER);
217  vx_outb(chip, RUER, regRUER);
218 
219  /* Reset the Xilinx's signal enabling IO access */
221  vx_outb(chip, DIALOG, chip->regDIALOG);
222  vx_inb(chip, DIALOG);
223  msleep(10);
225  vx_outb(chip, DIALOG, chip->regDIALOG);
226  vx_inb(chip, DIALOG);
227 
228  /* Reset of the Codec */
229  vxp_reset_codec(_chip);
230  vx_reset_dsp(_chip);
231 
232  return 0;
233 
234  _error:
235  vx_outb(chip, CSUER, regCSUER);
236  vx_outb(chip, RUER, regRUER);
238  vx_outb(chip, DIALOG, chip->regDIALOG);
239  return -EIO;
240 }
241 
242 
243 /*
244  * vxp_load_dsp - load_dsp callback
245  */
246 static int vxp_load_dsp(struct vx_core *vx, int index, const struct firmware *fw)
247 {
248  int err;
249 
250  switch (index) {
251  case 0:
252  /* xilinx boot */
253  if ((err = vx_check_magic(vx)) < 0)
254  return err;
255  if ((err = snd_vx_load_boot_image(vx, fw)) < 0)
256  return err;
257  return 0;
258  case 1:
259  /* xilinx image */
260  return vxp_load_xilinx_binary(vx, fw);
261  case 2:
262  /* DSP boot */
263  return snd_vx_dsp_boot(vx, fw);
264  case 3:
265  /* DSP image */
266  return snd_vx_dsp_load(vx, fw);
267  default:
268  snd_BUG();
269  return -EINVAL;
270  }
271 }
272 
273 
274 /*
275  * vx_test_and_ack - test and acknowledge interrupt
276  *
277  * called from irq hander, too
278  *
279  * spinlock held!
280  */
281 static int vxp_test_and_ack(struct vx_core *_chip)
282 {
283  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
284 
285  /* not booted yet? */
286  if (! (_chip->chip_status & VX_STAT_XILINX_LOADED))
287  return -ENXIO;
288 
289  if (! (vx_inb(chip, DIALOG) & VXP_DLG_MEMIRQ_MASK))
290  return -EIO;
291 
292  /* ok, interrupts generated, now ack it */
293  /* set ACQUIT bit up and down */
294  vx_outb(chip, DIALOG, chip->regDIALOG | VXP_DLG_ACK_MEMIRQ_MASK);
295  /* useless read just to spend some time and maintain
296  * the ACQUIT signal up for a while ( a bus cycle )
297  */
298  vx_inb(chip, DIALOG);
299  vx_outb(chip, DIALOG, chip->regDIALOG & ~VXP_DLG_ACK_MEMIRQ_MASK);
300 
301  return 0;
302 }
303 
304 
305 /*
306  * vx_validate_irq - enable/disable IRQ
307  */
308 static void vxp_validate_irq(struct vx_core *_chip, int enable)
309 {
310  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
311 
312  /* Set the interrupt enable bit to 1 in CDSP register */
313  if (enable)
315  else
317  vx_outb(chip, CDSP, chip->regCDSP);
318 }
319 
320 /*
321  * vx_setup_pseudo_dma - set up the pseudo dma read/write mode.
322  * @do_write: 0 = read, 1 = set up for DMA write
323  */
324 static void vx_setup_pseudo_dma(struct vx_core *_chip, int do_write)
325 {
326  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
327 
328  /* Interrupt mode and HREQ pin enabled for host transmit / receive data transfers */
329  vx_outb(chip, ICR, do_write ? ICR_TREQ : ICR_RREQ);
330  /* Reset the pseudo-dma register */
331  vx_inb(chip, ISR);
332  vx_outb(chip, ISR, 0);
333 
334  /* Select DMA in read/write transfer mode and in 16-bit accesses */
337  vx_outb(chip, DIALOG, chip->regDIALOG);
338 
339 }
340 
341 /*
342  * vx_release_pseudo_dma - disable the pseudo-DMA mode
343  */
344 static void vx_release_pseudo_dma(struct vx_core *_chip)
345 {
346  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
347 
348  /* Disable DMA and 16-bit accesses */
352  vx_outb(chip, DIALOG, chip->regDIALOG);
353  /* HREQ pin disabled. */
354  vx_outb(chip, ICR, 0);
355 }
356 
357 /*
358  * vx_pseudo_dma_write - write bulk data on pseudo-DMA mode
359  * @count: data length to transfer in bytes
360  *
361  * data size must be aligned to 6 bytes to ensure the 24bit alignment on DSP.
362  * NB: call with a certain lock!
363  */
364 static void vxp_dma_write(struct vx_core *chip, struct snd_pcm_runtime *runtime,
365  struct vx_pipe *pipe, int count)
366 {
367  long port = vxp_reg_addr(chip, VX_DMA);
368  int offset = pipe->hw_ptr;
369  unsigned short *addr = (unsigned short *)(runtime->dma_area + offset);
370 
371  vx_setup_pseudo_dma(chip, 1);
372  if (offset + count > pipe->buffer_bytes) {
373  int length = pipe->buffer_bytes - offset;
374  count -= length;
375  length >>= 1; /* in 16bit words */
376  /* Transfer using pseudo-dma. */
377  while (length-- > 0) {
378  outw(cpu_to_le16(*addr), port);
379  addr++;
380  }
381  addr = (unsigned short *)runtime->dma_area;
382  pipe->hw_ptr = 0;
383  }
384  pipe->hw_ptr += count;
385  count >>= 1; /* in 16bit words */
386  /* Transfer using pseudo-dma. */
387  while (count-- > 0) {
388  outw(cpu_to_le16(*addr), port);
389  addr++;
390  }
391  vx_release_pseudo_dma(chip);
392 }
393 
394 
395 /*
396  * vx_pseudo_dma_read - read bulk data on pseudo DMA mode
397  * @offset: buffer offset in bytes
398  * @count: data length to transfer in bytes
399  *
400  * the read length must be aligned to 6 bytes, as well as write.
401  * NB: call with a certain lock!
402  */
403 static void vxp_dma_read(struct vx_core *chip, struct snd_pcm_runtime *runtime,
404  struct vx_pipe *pipe, int count)
405 {
406  struct snd_vxpocket *pchip = (struct snd_vxpocket *)chip;
407  long port = vxp_reg_addr(chip, VX_DMA);
408  int offset = pipe->hw_ptr;
409  unsigned short *addr = (unsigned short *)(runtime->dma_area + offset);
410 
411  if (snd_BUG_ON(count % 2))
412  return;
413  vx_setup_pseudo_dma(chip, 0);
414  if (offset + count > pipe->buffer_bytes) {
415  int length = pipe->buffer_bytes - offset;
416  count -= length;
417  length >>= 1; /* in 16bit words */
418  /* Transfer using pseudo-dma. */
419  while (length-- > 0)
420  *addr++ = le16_to_cpu(inw(port));
421  addr = (unsigned short *)runtime->dma_area;
422  pipe->hw_ptr = 0;
423  }
424  pipe->hw_ptr += count;
425  count >>= 1; /* in 16bit words */
426  /* Transfer using pseudo-dma. */
427  while (count-- > 1)
428  *addr++ = le16_to_cpu(inw(port));
429  /* Disable DMA */
431  vx_outb(chip, DIALOG, pchip->regDIALOG);
432  /* Read the last word (16 bits) */
433  *addr = le16_to_cpu(inw(port));
434  /* Disable 16-bit accesses */
436  vx_outb(chip, DIALOG, pchip->regDIALOG);
437  /* HREQ pin disabled. */
438  vx_outb(chip, ICR, 0);
439 }
440 
441 
442 /*
443  * write a codec data (24bit)
444  */
445 static void vxp_write_codec_reg(struct vx_core *chip, int codec, unsigned int data)
446 {
447  int i;
448 
449  /* Activate access to the corresponding codec register */
450  if (! codec)
451  vx_inb(chip, LOFREQ);
452  else
453  vx_inb(chip, CODEC2);
454 
455  /* We have to send 24 bits (3 x 8 bits). Start with most signif. Bit */
456  for (i = 0; i < 24; i++, data <<= 1)
457  vx_outb(chip, DATA, ((data & 0x800000) ? VX_DATA_CODEC_MASK : 0));
458 
459  /* Terminate access to codec registers */
460  vx_inb(chip, HIFREQ);
461 }
462 
463 
464 /*
465  * vx_set_mic_boost - set mic boost level (on vxp440 only)
466  * @boost: 0 = 20dB, 1 = +38dB
467  */
468 void vx_set_mic_boost(struct vx_core *chip, int boost)
469 {
470  struct snd_vxpocket *pchip = (struct snd_vxpocket *)chip;
471  unsigned long flags;
472 
473  if (chip->chip_status & VX_STAT_IS_STALE)
474  return;
475 
476  spin_lock_irqsave(&chip->lock, flags);
477  if (pchip->regCDSP & P24_CDSP_MICS_SEL_MASK) {
478  if (boost) {
479  /* boost: 38 dB */
480  pchip->regCDSP &= ~P24_CDSP_MIC20_SEL_MASK;
482  } else {
483  /* minimum value: 20 dB */
485  pchip->regCDSP &= ~P24_CDSP_MIC38_SEL_MASK;
486  }
487  vx_outb(chip, CDSP, pchip->regCDSP);
488  }
489  spin_unlock_irqrestore(&chip->lock, flags);
490 }
491 
492 /*
493  * remap the linear value (0-8) to the actual value (0-15)
494  */
495 static int vx_compute_mic_level(int level)
496 {
497  switch (level) {
498  case 5: level = 6 ; break;
499  case 6: level = 8 ; break;
500  case 7: level = 11; break;
501  case 8: level = 15; break;
502  default: break ;
503  }
504  return level;
505 }
506 
507 /*
508  * vx_set_mic_level - set mic level (on vxpocket only)
509  * @level: the mic level = 0 - 8 (max)
510  */
511 void vx_set_mic_level(struct vx_core *chip, int level)
512 {
513  struct snd_vxpocket *pchip = (struct snd_vxpocket *)chip;
514  unsigned long flags;
515 
516  if (chip->chip_status & VX_STAT_IS_STALE)
517  return;
518 
519  spin_lock_irqsave(&chip->lock, flags);
520  if (pchip->regCDSP & VXP_CDSP_MIC_SEL_MASK) {
521  level = vx_compute_mic_level(level);
522  vx_outb(chip, MICRO, level);
523  }
524  spin_unlock_irqrestore(&chip->lock, flags);
525 }
526 
527 
528 /*
529  * change the input audio source
530  */
531 static void vxp_change_audio_source(struct vx_core *_chip, int src)
532 {
533  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
534 
535  switch (src) {
538  vx_outb(chip, CDSP, chip->regCDSP);
539  break;
540  case VX_AUDIO_SRC_LINE:
542  if (_chip->type == VX_TYPE_VXP440)
544  else
545  chip->regCDSP &= ~VXP_CDSP_MIC_SEL_MASK;
546  vx_outb(chip, CDSP, chip->regCDSP);
547  break;
548  case VX_AUDIO_SRC_MIC:
550  /* reset mic levels */
551  if (_chip->type == VX_TYPE_VXP440) {
553  if (chip->mic_level)
555  else
557  vx_outb(chip, CDSP, chip->regCDSP);
558  } else {
560  vx_outb(chip, CDSP, chip->regCDSP);
561  vx_outb(chip, MICRO, vx_compute_mic_level(chip->mic_level));
562  }
563  break;
564  }
565 }
566 
567 /*
568  * change the clock source
569  * source = INTERNAL_QUARTZ or UER_SYNC
570  */
571 static void vxp_set_clock_source(struct vx_core *_chip, int source)
572 {
573  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
574 
575  if (source == INTERNAL_QUARTZ)
577  else
579  vx_outb(chip, CDSP, chip->regCDSP);
580 }
581 
582 
583 /*
584  * reset the board
585  */
586 static void vxp_reset_board(struct vx_core *_chip, int cold_reset)
587 {
588  struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
589 
590  chip->regCDSP = 0;
591  chip->regDIALOG = 0;
592 }
593 
594 
595 /*
596  * callbacks
597  */
598 /* exported */
600  .in8 = vxp_inb,
601  .out8 = vxp_outb,
602  .test_and_ack = vxp_test_and_ack,
603  .validate_irq = vxp_validate_irq,
604  .write_codec = vxp_write_codec_reg,
605  .reset_codec = vxp_reset_codec,
606  .change_audio_source = vxp_change_audio_source,
607  .set_clock_source = vxp_set_clock_source,
608  .load_dsp = vxp_load_dsp,
609  .add_controls = vxp_add_mic_controls,
610  .reset_dsp = vxp_reset_dsp,
611  .reset_board = vxp_reset_board,
612  .dma_write = vxp_dma_write,
613  .dma_read = vxp_dma_read,
614 };