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Russell Kingcb5a6ff2005-05-12 14:04:59 +02001/*
2 * linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
3 *
4 * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Documentation: ARM DDI 0173B
11 */
12#include <linux/module.h>
13#include <linux/delay.h>
14#include <linux/init.h>
15#include <linux/ioport.h>
16#include <linux/device.h>
17#include <linux/spinlock.h>
18#include <linux/interrupt.h>
19#include <linux/err.h>
Russell Kinga62c80e2006-01-07 13:52:45 +000020#include <linux/amba/bus.h>
Russell King88cdca92009-11-23 09:44:10 +010021#include <linux/io.h>
Russell Kingcb5a6ff2005-05-12 14:04:59 +020022
Russell Kingcb5a6ff2005-05-12 14:04:59 +020023#include <sound/core.h>
24#include <sound/initval.h>
25#include <sound/ac97_codec.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28
29#include "aaci.h"
Russell Kingcb5a6ff2005-05-12 14:04:59 +020030
31#define DRIVER_NAME "aaci-pl041"
32
Russell King250c7a62011-01-12 23:42:57 +000033#define FRAME_PERIOD_US 21
34
Russell Kingcb5a6ff2005-05-12 14:04:59 +020035/*
36 * PM support is not complete. Turn it off.
37 */
38#undef CONFIG_PM
39
Takashi Iwaiceb9e472005-11-17 15:10:16 +010040static void aaci_ac97_select_codec(struct aaci *aaci, struct snd_ac97 *ac97)
Russell Kingcb5a6ff2005-05-12 14:04:59 +020041{
42 u32 v, maincr = aaci->maincr | MAINCR_SCRA(ac97->num);
43
44 /*
45 * Ensure that the slot 1/2 RX registers are empty.
46 */
47 v = readl(aaci->base + AACI_SLFR);
48 if (v & SLFR_2RXV)
49 readl(aaci->base + AACI_SL2RX);
50 if (v & SLFR_1RXV)
51 readl(aaci->base + AACI_SL1RX);
52
Russell King7c289382011-02-05 10:41:55 +000053 if (maincr != readl(aaci->base + AACI_MAINCR)) {
54 writel(maincr, aaci->base + AACI_MAINCR);
55 readl(aaci->base + AACI_MAINCR);
56 udelay(1);
57 }
Russell Kingcb5a6ff2005-05-12 14:04:59 +020058}
59
60/*
61 * P29:
62 * The recommended use of programming the external codec through slot 1
63 * and slot 2 data is to use the channels during setup routines and the
64 * slot register at any other time. The data written into slot 1, slot 2
65 * and slot 12 registers is transmitted only when their corresponding
66 * SI1TxEn, SI2TxEn and SI12TxEn bits are set in the AACI_MAINCR
67 * register.
68 */
Kevin Hilman14d178a2007-02-07 05:46:47 +010069static void aaci_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
70 unsigned short val)
Russell Kingcb5a6ff2005-05-12 14:04:59 +020071{
72 struct aaci *aaci = ac97->private_data;
Russell King250c7a62011-01-12 23:42:57 +000073 int timeout;
Russell Kingcb5a6ff2005-05-12 14:04:59 +020074 u32 v;
75
76 if (ac97->num >= 4)
77 return;
78
Ingo Molnar12aa7572006-01-16 16:36:05 +010079 mutex_lock(&aaci->ac97_sem);
Russell Kingcb5a6ff2005-05-12 14:04:59 +020080
81 aaci_ac97_select_codec(aaci, ac97);
82
83 /*
84 * P54: You must ensure that AACI_SL2TX is always written
85 * to, if required, before data is written to AACI_SL1TX.
86 */
87 writel(val << 4, aaci->base + AACI_SL2TX);
88 writel(reg << 12, aaci->base + AACI_SL1TX);
89
Russell King250c7a62011-01-12 23:42:57 +000090 /* Initially, wait one frame period */
91 udelay(FRAME_PERIOD_US);
92
93 /* And then wait an additional eight frame periods for it to be sent */
94 timeout = FRAME_PERIOD_US * 8;
Russell Kingcb5a6ff2005-05-12 14:04:59 +020095 do {
Russell King250c7a62011-01-12 23:42:57 +000096 udelay(1);
Russell Kingcb5a6ff2005-05-12 14:04:59 +020097 v = readl(aaci->base + AACI_SLFR);
Roel Kluinf6f35bb2009-02-08 15:22:25 +010098 } while ((v & (SLFR_1TXB|SLFR_2TXB)) && --timeout);
Kevin Hilman14d178a2007-02-07 05:46:47 +010099
Russell King69058cd2011-01-12 23:17:24 +0000100 if (v & (SLFR_1TXB|SLFR_2TXB))
Kevin Hilman14d178a2007-02-07 05:46:47 +0100101 dev_err(&aaci->dev->dev,
102 "timeout waiting for write to complete\n");
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200103
Ingo Molnar12aa7572006-01-16 16:36:05 +0100104 mutex_unlock(&aaci->ac97_sem);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200105}
106
107/*
108 * Read an AC'97 register.
109 */
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100110static unsigned short aaci_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200111{
112 struct aaci *aaci = ac97->private_data;
Russell King250c7a62011-01-12 23:42:57 +0000113 int timeout, retries = 10;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200114 u32 v;
115
116 if (ac97->num >= 4)
117 return ~0;
118
Ingo Molnar12aa7572006-01-16 16:36:05 +0100119 mutex_lock(&aaci->ac97_sem);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200120
121 aaci_ac97_select_codec(aaci, ac97);
122
123 /*
124 * Write the register address to slot 1.
125 */
126 writel((reg << 12) | (1 << 19), aaci->base + AACI_SL1TX);
127
Russell King250c7a62011-01-12 23:42:57 +0000128 /* Initially, wait one frame period */
129 udelay(FRAME_PERIOD_US);
130
131 /* And then wait an additional eight frame periods for it to be sent */
132 timeout = FRAME_PERIOD_US * 8;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200133 do {
Russell King250c7a62011-01-12 23:42:57 +0000134 udelay(1);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200135 v = readl(aaci->base + AACI_SLFR);
Roel Kluinf6f35bb2009-02-08 15:22:25 +0100136 } while ((v & SLFR_1TXB) && --timeout);
Kevin Hilman14d178a2007-02-07 05:46:47 +0100137
Russell King69058cd2011-01-12 23:17:24 +0000138 if (v & SLFR_1TXB) {
Kevin Hilman14d178a2007-02-07 05:46:47 +0100139 dev_err(&aaci->dev->dev, "timeout on slot 1 TX busy\n");
140 v = ~0;
141 goto out;
142 }
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200143
Russell King250c7a62011-01-12 23:42:57 +0000144 /* Now wait for the response frame */
145 udelay(FRAME_PERIOD_US);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200146
Russell King250c7a62011-01-12 23:42:57 +0000147 /* And then wait an additional eight frame periods for data */
148 timeout = FRAME_PERIOD_US * 8;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200149 do {
Russell King250c7a62011-01-12 23:42:57 +0000150 udelay(1);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200151 cond_resched();
152 v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV);
Roel Kluinf6f35bb2009-02-08 15:22:25 +0100153 } while ((v != (SLFR_1RXV|SLFR_2RXV)) && --timeout);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200154
Russell King69058cd2011-01-12 23:17:24 +0000155 if (v != (SLFR_1RXV|SLFR_2RXV)) {
Kevin Hilman14d178a2007-02-07 05:46:47 +0100156 dev_err(&aaci->dev->dev, "timeout on RX valid\n");
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200157 v = ~0;
Kevin Hilman14d178a2007-02-07 05:46:47 +0100158 goto out;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200159 }
160
Kevin Hilman14d178a2007-02-07 05:46:47 +0100161 do {
162 v = readl(aaci->base + AACI_SL1RX) >> 12;
163 if (v == reg) {
164 v = readl(aaci->base + AACI_SL2RX) >> 4;
165 break;
166 } else if (--retries) {
167 dev_warn(&aaci->dev->dev,
168 "ac97 read back fail. retry\n");
169 continue;
170 } else {
171 dev_warn(&aaci->dev->dev,
172 "wrong ac97 register read back (%x != %x)\n",
173 v, reg);
174 v = ~0;
175 }
176 } while (retries);
177 out:
Ingo Molnar12aa7572006-01-16 16:36:05 +0100178 mutex_unlock(&aaci->ac97_sem);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200179 return v;
180}
181
Russell Kingd6a89fe2009-12-18 17:48:50 +0000182static inline void
183aaci_chan_wait_ready(struct aaci_runtime *aacirun, unsigned long mask)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200184{
185 u32 val;
186 int timeout = 5000;
187
188 do {
Russell King250c7a62011-01-12 23:42:57 +0000189 udelay(1);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200190 val = readl(aacirun->base + AACI_SR);
Russell Kingd6a89fe2009-12-18 17:48:50 +0000191 } while (val & mask && timeout--);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200192}
193
194
195
196/*
197 * Interrupt support.
198 */
Kevin Hilman62578cb2007-02-07 05:41:37 +0100199static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200200{
Kevin Hilman41762b82007-02-07 05:45:32 +0100201 if (mask & ISR_ORINTR) {
202 dev_warn(&aaci->dev->dev, "RX overrun on chan %d\n", channel);
203 writel(ICLR_RXOEC1 << channel, aaci->base + AACI_INTCLR);
204 }
205
206 if (mask & ISR_RXTOINTR) {
207 dev_warn(&aaci->dev->dev, "RX timeout on chan %d\n", channel);
208 writel(ICLR_RXTOFEC1 << channel, aaci->base + AACI_INTCLR);
209 }
210
211 if (mask & ISR_RXINTR) {
212 struct aaci_runtime *aacirun = &aaci->capture;
Russell Kingea51d0b2011-01-13 08:47:35 +0000213 bool period_elapsed = false;
Kevin Hilman41762b82007-02-07 05:45:32 +0100214 void *ptr;
215
216 if (!aacirun->substream || !aacirun->start) {
Joe Perches898eb712007-10-18 03:06:30 -0700217 dev_warn(&aaci->dev->dev, "RX interrupt???\n");
Kevin Hilman41762b82007-02-07 05:45:32 +0100218 writel(0, aacirun->base + AACI_IE);
219 return;
220 }
Kevin Hilman41762b82007-02-07 05:45:32 +0100221
Russell Kingd6a89fe2009-12-18 17:48:50 +0000222 spin_lock(&aacirun->lock);
223
224 ptr = aacirun->ptr;
Kevin Hilman41762b82007-02-07 05:45:32 +0100225 do {
Russell King5d350cb2011-01-13 22:25:10 +0000226 unsigned int len = aacirun->fifo_bytes;
Kevin Hilman41762b82007-02-07 05:45:32 +0100227 u32 val;
228
229 if (aacirun->bytes <= 0) {
230 aacirun->bytes += aacirun->period;
Russell Kingea51d0b2011-01-13 08:47:35 +0000231 period_elapsed = true;
Kevin Hilman41762b82007-02-07 05:45:32 +0100232 }
233 if (!(aacirun->cr & CR_EN))
234 break;
235
236 val = readl(aacirun->base + AACI_SR);
237 if (!(val & SR_RXHF))
238 break;
239 if (!(val & SR_RXFF))
240 len >>= 1;
241
242 aacirun->bytes -= len;
243
244 /* reading 16 bytes at a time */
245 for( ; len > 0; len -= 16) {
246 asm(
247 "ldmia %1, {r0, r1, r2, r3}\n\t"
248 "stmia %0!, {r0, r1, r2, r3}"
249 : "+r" (ptr)
250 : "r" (aacirun->fifo)
251 : "r0", "r1", "r2", "r3", "cc");
252
253 if (ptr >= aacirun->end)
254 ptr = aacirun->start;
255 }
256 } while(1);
Russell Kingd6a89fe2009-12-18 17:48:50 +0000257
Kevin Hilman41762b82007-02-07 05:45:32 +0100258 aacirun->ptr = ptr;
Russell Kingd6a89fe2009-12-18 17:48:50 +0000259
260 spin_unlock(&aacirun->lock);
Russell Kingea51d0b2011-01-13 08:47:35 +0000261
262 if (period_elapsed)
263 snd_pcm_period_elapsed(aacirun->substream);
Kevin Hilman41762b82007-02-07 05:45:32 +0100264 }
265
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200266 if (mask & ISR_URINTR) {
Kevin Hilman62578cb2007-02-07 05:41:37 +0100267 dev_dbg(&aaci->dev->dev, "TX underrun on chan %d\n", channel);
268 writel(ICLR_TXUEC1 << channel, aaci->base + AACI_INTCLR);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200269 }
270
271 if (mask & ISR_TXINTR) {
272 struct aaci_runtime *aacirun = &aaci->playback;
Russell Kingea51d0b2011-01-13 08:47:35 +0000273 bool period_elapsed = false;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200274 void *ptr;
275
276 if (!aacirun->substream || !aacirun->start) {
Joe Perches898eb712007-10-18 03:06:30 -0700277 dev_warn(&aaci->dev->dev, "TX interrupt???\n");
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200278 writel(0, aacirun->base + AACI_IE);
279 return;
280 }
281
Russell Kingd6a89fe2009-12-18 17:48:50 +0000282 spin_lock(&aacirun->lock);
283
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200284 ptr = aacirun->ptr;
285 do {
Russell King5d350cb2011-01-13 22:25:10 +0000286 unsigned int len = aacirun->fifo_bytes;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200287 u32 val;
288
289 if (aacirun->bytes <= 0) {
290 aacirun->bytes += aacirun->period;
Russell Kingea51d0b2011-01-13 08:47:35 +0000291 period_elapsed = true;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200292 }
Kevin Hilman41762b82007-02-07 05:45:32 +0100293 if (!(aacirun->cr & CR_EN))
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200294 break;
295
296 val = readl(aacirun->base + AACI_SR);
297 if (!(val & SR_TXHE))
298 break;
299 if (!(val & SR_TXFE))
300 len >>= 1;
301
302 aacirun->bytes -= len;
303
304 /* writing 16 bytes at a time */
305 for ( ; len > 0; len -= 16) {
306 asm(
307 "ldmia %0!, {r0, r1, r2, r3}\n\t"
308 "stmia %1, {r0, r1, r2, r3}"
309 : "+r" (ptr)
310 : "r" (aacirun->fifo)
311 : "r0", "r1", "r2", "r3", "cc");
312
313 if (ptr >= aacirun->end)
314 ptr = aacirun->start;
315 }
316 } while (1);
317
318 aacirun->ptr = ptr;
Russell Kingd6a89fe2009-12-18 17:48:50 +0000319
320 spin_unlock(&aacirun->lock);
Russell Kingea51d0b2011-01-13 08:47:35 +0000321
322 if (period_elapsed)
323 snd_pcm_period_elapsed(aacirun->substream);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200324 }
325}
326
David Howells7d12e782006-10-05 14:55:46 +0100327static irqreturn_t aaci_irq(int irq, void *devid)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200328{
329 struct aaci *aaci = devid;
330 u32 mask;
331 int i;
332
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200333 mask = readl(aaci->base + AACI_ALLINTS);
334 if (mask) {
335 u32 m = mask;
336 for (i = 0; i < 4; i++, m >>= 7) {
337 if (m & 0x7f) {
Kevin Hilman62578cb2007-02-07 05:41:37 +0100338 aaci_fifo_irq(aaci, i, m);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200339 }
340 }
341 }
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200342
343 return mask ? IRQ_HANDLED : IRQ_NONE;
344}
345
346
347
348/*
349 * ALSA support.
350 */
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100351static struct snd_pcm_hardware aaci_hw_info = {
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200352 .info = SNDRV_PCM_INFO_MMAP |
353 SNDRV_PCM_INFO_MMAP_VALID |
354 SNDRV_PCM_INFO_INTERLEAVED |
355 SNDRV_PCM_INFO_BLOCK_TRANSFER |
356 SNDRV_PCM_INFO_RESUME,
357
358 /*
359 * ALSA doesn't support 18-bit or 20-bit packed into 32-bit
360 * words. It also doesn't support 12-bit at all.
361 */
362 .formats = SNDRV_PCM_FMTBIT_S16_LE,
363
Russell King6ca867c2009-12-18 17:48:35 +0000364 /* rates are setup from the AC'97 codec */
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200365 .channels_min = 2,
Russell Kinge831d802011-01-13 10:13:17 +0000366 .channels_max = 2,
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200367 .buffer_bytes_max = 64 * 1024,
368 .period_bytes_min = 256,
369 .period_bytes_max = PAGE_SIZE,
370 .periods_min = 4,
371 .periods_max = PAGE_SIZE / 16,
372};
373
Russell Kinge831d802011-01-13 10:13:17 +0000374/*
375 * We can support two and four channel audio. Unfortunately
376 * six channel audio requires a non-standard channel ordering:
377 * 2 -> FL(3), FR(4)
378 * 4 -> FL(3), FR(4), SL(7), SR(8)
379 * 6 -> FL(3), FR(4), SL(7), SR(8), C(6), LFE(9) (required)
380 * FL(3), FR(4), C(6), SL(7), SR(8), LFE(9) (actual)
381 * This requires an ALSA configuration file to correct.
382 */
383static int aaci_rule_channels(struct snd_pcm_hw_params *p,
384 struct snd_pcm_hw_rule *rule)
385{
386 static unsigned int channel_list[] = { 2, 4, 6 };
387 struct aaci *aaci = rule->private;
388 unsigned int mask = 1 << 0, slots;
389
390 /* pcms[0] is the our 5.1 PCM instance. */
391 slots = aaci->ac97_bus->pcms[0].r[0].slots;
392 if (slots & (1 << AC97_SLOT_PCM_SLEFT)) {
393 mask |= 1 << 1;
394 if (slots & (1 << AC97_SLOT_LFE))
395 mask |= 1 << 2;
396 }
397
398 return snd_interval_list(hw_param_interval(p, rule->var),
399 ARRAY_SIZE(channel_list), channel_list, mask);
400}
401
402static int aaci_pcm_open(struct snd_pcm_substream *substream)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200403{
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100404 struct snd_pcm_runtime *runtime = substream->runtime;
Russell Kinge831d802011-01-13 10:13:17 +0000405 struct aaci *aaci = substream->private_data;
406 struct aaci_runtime *aacirun;
Russell Kingb60fb512011-01-25 15:52:33 +0000407 int ret = 0;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200408
Russell Kinge831d802011-01-13 10:13:17 +0000409 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
410 aacirun = &aaci->playback;
411 } else {
412 aacirun = &aaci->capture;
413 }
414
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200415 aacirun->substream = substream;
416 runtime->private_data = aacirun;
417 runtime->hw = aaci_hw_info;
Russell King6ca867c2009-12-18 17:48:35 +0000418 runtime->hw.rates = aacirun->pcm->rates;
419 snd_pcm_limit_hw_rates(runtime);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200420
Russell Kinge831d802011-01-13 10:13:17 +0000421 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
422 runtime->hw.channels_max = 6;
423
424 /* Add rule describing channel dependency. */
425 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
426 SNDRV_PCM_HW_PARAM_CHANNELS,
427 aaci_rule_channels, aaci,
428 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
429 if (ret)
430 return ret;
431
432 if (aacirun->pcm->r[1].slots)
433 snd_ac97_pcm_double_rate_rules(runtime);
434 }
Russell Kinga08d5652009-12-18 17:48:45 +0000435
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200436 /*
Russell King5d350cb2011-01-13 22:25:10 +0000437 * ALSA wants the byte-size of the FIFOs. As we only support
438 * 16-bit samples, this is twice the FIFO depth irrespective
439 * of whether it's in compact mode or not.
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200440 */
Russell King5d350cb2011-01-13 22:25:10 +0000441 runtime->hw.fifo_size = aaci->fifo_depth * 2;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200442
Russell Kingb60fb512011-01-25 15:52:33 +0000443 mutex_lock(&aaci->irq_lock);
444 if (!aaci->users++) {
445 ret = request_irq(aaci->dev->irq[0], aaci_irq,
Yong Zhang88e24c32011-09-22 16:59:20 +0800446 IRQF_SHARED, DRIVER_NAME, aaci);
Russell Kingb60fb512011-01-25 15:52:33 +0000447 if (ret != 0)
448 aaci->users--;
449 }
450 mutex_unlock(&aaci->irq_lock);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200451
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200452 return ret;
453}
454
455
456/*
457 * Common ALSA stuff
458 */
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100459static int aaci_pcm_close(struct snd_pcm_substream *substream)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200460{
461 struct aaci *aaci = substream->private_data;
462 struct aaci_runtime *aacirun = substream->runtime->private_data;
463
Kevin Hilman41762b82007-02-07 05:45:32 +0100464 WARN_ON(aacirun->cr & CR_EN);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200465
466 aacirun->substream = NULL;
Russell Kingb60fb512011-01-25 15:52:33 +0000467
468 mutex_lock(&aaci->irq_lock);
469 if (!--aaci->users)
470 free_irq(aaci->dev->irq[0], aaci);
471 mutex_unlock(&aaci->irq_lock);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200472
473 return 0;
474}
475
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100476static int aaci_pcm_hw_free(struct snd_pcm_substream *substream)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200477{
478 struct aaci_runtime *aacirun = substream->runtime->private_data;
479
480 /*
481 * This must not be called with the device enabled.
482 */
Kevin Hilman41762b82007-02-07 05:45:32 +0100483 WARN_ON(aacirun->cr & CR_EN);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200484
485 if (aacirun->pcm_open)
486 snd_ac97_pcm_close(aacirun->pcm);
487 aacirun->pcm_open = 0;
488
489 /*
490 * Clear out the DMA and any allocated buffers.
491 */
Takashi Iwaid6797322009-11-26 15:08:54 +0100492 snd_pcm_lib_free_pages(substream);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200493
494 return 0;
495}
496
Russell King58e8a472011-01-26 16:59:39 +0000497/* Channel to slot mask */
498static const u32 channels_to_slotmask[] = {
499 [2] = CR_SL3 | CR_SL4,
500 [4] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8,
501 [6] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8 | CR_SL6 | CR_SL9,
502};
503
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100504static int aaci_pcm_hw_params(struct snd_pcm_substream *substream,
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100505 struct snd_pcm_hw_params *params)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200506{
Russell King58e8a472011-01-26 16:59:39 +0000507 struct aaci_runtime *aacirun = substream->runtime->private_data;
508 unsigned int channels = params_channels(params);
509 unsigned int rate = params_rate(params);
510 int dbl = rate > 48000;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200511 int err;
512
513 aaci_pcm_hw_free(substream);
Russell King4acd57c2009-11-29 16:39:52 +0000514 if (aacirun->pcm_open) {
515 snd_ac97_pcm_close(aacirun->pcm);
516 aacirun->pcm_open = 0;
517 }
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200518
Russell King58e8a472011-01-26 16:59:39 +0000519 /* channels is already limited to 2, 4, or 6 by aaci_rule_channels */
520 if (dbl && channels != 2)
521 return -EINVAL;
522
Takashi Iwaid6797322009-11-26 15:08:54 +0100523 err = snd_pcm_lib_malloc_pages(substream,
524 params_buffer_bytes(params));
Russell King4e30b692009-12-18 17:48:37 +0000525 if (err >= 0) {
Russell King58e8a472011-01-26 16:59:39 +0000526 struct aaci *aaci = substream->private_data;
Russell Kinga08d5652009-12-18 17:48:45 +0000527
Russell King58e8a472011-01-26 16:59:39 +0000528 err = snd_ac97_pcm_open(aacirun->pcm, rate, channels,
Russell Kinga08d5652009-12-18 17:48:45 +0000529 aacirun->pcm->r[dbl].slots);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200530
Russell King4e30b692009-12-18 17:48:37 +0000531 aacirun->pcm_open = err == 0;
Russell Kingd3aee792009-12-18 17:48:40 +0000532 aacirun->cr = CR_FEN | CR_COMPACT | CR_SZ16;
Russell King58e8a472011-01-26 16:59:39 +0000533 aacirun->cr |= channels_to_slotmask[channels + dbl * 2];
Russell Kingd3aee792009-12-18 17:48:40 +0000534
Russell King5d350cb2011-01-13 22:25:10 +0000535 /*
536 * fifo_bytes is the number of bytes we transfer to/from
537 * the FIFO, including padding. So that's x4. As we're
538 * in compact mode, the FIFO is half the size.
539 */
540 aacirun->fifo_bytes = aaci->fifo_depth * 4 / 2;
Russell King4e30b692009-12-18 17:48:37 +0000541 }
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200542
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200543 return err;
544}
545
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100546static int aaci_pcm_prepare(struct snd_pcm_substream *substream)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200547{
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100548 struct snd_pcm_runtime *runtime = substream->runtime;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200549 struct aaci_runtime *aacirun = runtime->private_data;
550
Russell Kingc0dea822011-01-13 00:34:08 +0000551 aacirun->period = snd_pcm_lib_period_bytes(substream);
Russell King4e30b692009-12-18 17:48:37 +0000552 aacirun->start = runtime->dma_area;
Russell King88cdca92009-11-23 09:44:10 +0100553 aacirun->end = aacirun->start + snd_pcm_lib_buffer_bytes(substream);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200554 aacirun->ptr = aacirun->start;
Russell Kingc0dea822011-01-13 00:34:08 +0000555 aacirun->bytes = aacirun->period;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200556
557 return 0;
558}
559
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100560static snd_pcm_uframes_t aaci_pcm_pointer(struct snd_pcm_substream *substream)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200561{
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100562 struct snd_pcm_runtime *runtime = substream->runtime;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200563 struct aaci_runtime *aacirun = runtime->private_data;
564 ssize_t bytes = aacirun->ptr - aacirun->start;
565
566 return bytes_to_frames(runtime, bytes);
567}
568
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200569
570/*
571 * Playback specific ALSA stuff
572 */
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200573static void aaci_pcm_playback_stop(struct aaci_runtime *aacirun)
574{
575 u32 ie;
576
577 ie = readl(aacirun->base + AACI_IE);
578 ie &= ~(IE_URIE|IE_TXIE);
579 writel(ie, aacirun->base + AACI_IE);
Kevin Hilman41762b82007-02-07 05:45:32 +0100580 aacirun->cr &= ~CR_EN;
Russell Kingd6a89fe2009-12-18 17:48:50 +0000581 aaci_chan_wait_ready(aacirun, SR_TXB);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200582 writel(aacirun->cr, aacirun->base + AACI_TXCR);
583}
584
585static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
586{
587 u32 ie;
588
Russell Kingd6a89fe2009-12-18 17:48:50 +0000589 aaci_chan_wait_ready(aacirun, SR_TXB);
Kevin Hilman41762b82007-02-07 05:45:32 +0100590 aacirun->cr |= CR_EN;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200591
592 ie = readl(aacirun->base + AACI_IE);
593 ie |= IE_URIE | IE_TXIE;
594 writel(ie, aacirun->base + AACI_IE);
595 writel(aacirun->cr, aacirun->base + AACI_TXCR);
596}
597
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100598static int aaci_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200599{
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200600 struct aaci_runtime *aacirun = substream->runtime->private_data;
601 unsigned long flags;
602 int ret = 0;
603
Russell Kingd6a89fe2009-12-18 17:48:50 +0000604 spin_lock_irqsave(&aacirun->lock, flags);
605
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200606 switch (cmd) {
607 case SNDRV_PCM_TRIGGER_START:
608 aaci_pcm_playback_start(aacirun);
609 break;
610
611 case SNDRV_PCM_TRIGGER_RESUME:
612 aaci_pcm_playback_start(aacirun);
613 break;
614
615 case SNDRV_PCM_TRIGGER_STOP:
616 aaci_pcm_playback_stop(aacirun);
617 break;
618
619 case SNDRV_PCM_TRIGGER_SUSPEND:
620 aaci_pcm_playback_stop(aacirun);
621 break;
622
623 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
624 break;
625
626 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
627 break;
628
629 default:
630 ret = -EINVAL;
631 }
Russell Kingd6a89fe2009-12-18 17:48:50 +0000632
633 spin_unlock_irqrestore(&aacirun->lock, flags);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200634
635 return ret;
636}
637
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100638static struct snd_pcm_ops aaci_playback_ops = {
Kevin Hilman41762b82007-02-07 05:45:32 +0100639 .open = aaci_pcm_open,
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200640 .close = aaci_pcm_close,
641 .ioctl = snd_pcm_lib_ioctl,
Russell King58e8a472011-01-26 16:59:39 +0000642 .hw_params = aaci_pcm_hw_params,
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200643 .hw_free = aaci_pcm_hw_free,
644 .prepare = aaci_pcm_prepare,
645 .trigger = aaci_pcm_playback_trigger,
646 .pointer = aaci_pcm_pointer,
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200647};
648
Kevin Hilman41762b82007-02-07 05:45:32 +0100649static void aaci_pcm_capture_stop(struct aaci_runtime *aacirun)
650{
651 u32 ie;
652
Russell Kingd6a89fe2009-12-18 17:48:50 +0000653 aaci_chan_wait_ready(aacirun, SR_RXB);
Kevin Hilman41762b82007-02-07 05:45:32 +0100654
655 ie = readl(aacirun->base + AACI_IE);
656 ie &= ~(IE_ORIE | IE_RXIE);
657 writel(ie, aacirun->base+AACI_IE);
658
659 aacirun->cr &= ~CR_EN;
660
661 writel(aacirun->cr, aacirun->base + AACI_RXCR);
662}
663
664static void aaci_pcm_capture_start(struct aaci_runtime *aacirun)
665{
666 u32 ie;
667
Russell Kingd6a89fe2009-12-18 17:48:50 +0000668 aaci_chan_wait_ready(aacirun, SR_RXB);
Kevin Hilman41762b82007-02-07 05:45:32 +0100669
670#ifdef DEBUG
671 /* RX Timeout value: bits 28:17 in RXCR */
672 aacirun->cr |= 0xf << 17;
673#endif
674
675 aacirun->cr |= CR_EN;
676 writel(aacirun->cr, aacirun->base + AACI_RXCR);
677
678 ie = readl(aacirun->base + AACI_IE);
679 ie |= IE_ORIE |IE_RXIE; // overrun and rx interrupt -- half full
680 writel(ie, aacirun->base + AACI_IE);
681}
682
Russell King8a371842007-02-20 15:44:23 +0000683static int aaci_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
684{
Kevin Hilman41762b82007-02-07 05:45:32 +0100685 struct aaci_runtime *aacirun = substream->runtime->private_data;
686 unsigned long flags;
687 int ret = 0;
688
Russell Kingd6a89fe2009-12-18 17:48:50 +0000689 spin_lock_irqsave(&aacirun->lock, flags);
Kevin Hilman41762b82007-02-07 05:45:32 +0100690
691 switch (cmd) {
692 case SNDRV_PCM_TRIGGER_START:
693 aaci_pcm_capture_start(aacirun);
694 break;
695
696 case SNDRV_PCM_TRIGGER_RESUME:
697 aaci_pcm_capture_start(aacirun);
698 break;
699
700 case SNDRV_PCM_TRIGGER_STOP:
701 aaci_pcm_capture_stop(aacirun);
702 break;
703
704 case SNDRV_PCM_TRIGGER_SUSPEND:
705 aaci_pcm_capture_stop(aacirun);
706 break;
707
708 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
709 break;
710
711 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
712 break;
713
714 default:
715 ret = -EINVAL;
716 }
717
Russell Kingd6a89fe2009-12-18 17:48:50 +0000718 spin_unlock_irqrestore(&aacirun->lock, flags);
Kevin Hilman41762b82007-02-07 05:45:32 +0100719
720 return ret;
721}
722
Russell King8a371842007-02-20 15:44:23 +0000723static int aaci_pcm_capture_prepare(struct snd_pcm_substream *substream)
Kevin Hilman41762b82007-02-07 05:45:32 +0100724{
725 struct snd_pcm_runtime *runtime = substream->runtime;
726 struct aaci *aaci = substream->private_data;
727
728 aaci_pcm_prepare(substream);
729
730 /* allow changing of sample rate */
731 aaci_ac97_write(aaci->ac97, AC97_EXTENDED_STATUS, 0x0001); /* VRA */
732 aaci_ac97_write(aaci->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
733 aaci_ac97_write(aaci->ac97, AC97_PCM_MIC_ADC_RATE, runtime->rate);
734
735 /* Record select: Mic: 0, Aux: 3, Line: 4 */
736 aaci_ac97_write(aaci->ac97, AC97_REC_SEL, 0x0404);
737
738 return 0;
739}
740
Russell King8a371842007-02-20 15:44:23 +0000741static struct snd_pcm_ops aaci_capture_ops = {
Kevin Hilman41762b82007-02-07 05:45:32 +0100742 .open = aaci_pcm_open,
743 .close = aaci_pcm_close,
744 .ioctl = snd_pcm_lib_ioctl,
Russell King58e8a472011-01-26 16:59:39 +0000745 .hw_params = aaci_pcm_hw_params,
Kevin Hilman41762b82007-02-07 05:45:32 +0100746 .hw_free = aaci_pcm_hw_free,
747 .prepare = aaci_pcm_capture_prepare,
748 .trigger = aaci_pcm_capture_trigger,
749 .pointer = aaci_pcm_pointer,
Kevin Hilman41762b82007-02-07 05:45:32 +0100750};
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200751
752/*
753 * Power Management.
754 */
755#ifdef CONFIG_PM
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100756static int aaci_do_suspend(struct snd_card *card, unsigned int state)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200757{
758 struct aaci *aaci = card->private_data;
Takashi Iwai792a6c52005-11-17 17:19:25 +0100759 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
760 snd_pcm_suspend_all(aaci->pcm);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200761 return 0;
762}
763
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100764static int aaci_do_resume(struct snd_card *card, unsigned int state)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200765{
Takashi Iwai792a6c52005-11-17 17:19:25 +0100766 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200767 return 0;
768}
769
Richard Purdiee36d3942005-09-16 19:27:53 -0700770static int aaci_suspend(struct amba_device *dev, pm_message_t state)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200771{
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100772 struct snd_card *card = amba_get_drvdata(dev);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200773 return card ? aaci_do_suspend(card) : 0;
774}
775
776static int aaci_resume(struct amba_device *dev)
777{
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100778 struct snd_card *card = amba_get_drvdata(dev);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200779 return card ? aaci_do_resume(card) : 0;
780}
781#else
782#define aaci_do_suspend NULL
783#define aaci_do_resume NULL
784#define aaci_suspend NULL
785#define aaci_resume NULL
786#endif
787
788
789static struct ac97_pcm ac97_defs[] __devinitdata = {
Kevin Hilman41762b82007-02-07 05:45:32 +0100790 [0] = { /* Front PCM */
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200791 .exclusive = 1,
792 .r = {
793 [0] = {
794 .slots = (1 << AC97_SLOT_PCM_LEFT) |
795 (1 << AC97_SLOT_PCM_RIGHT) |
796 (1 << AC97_SLOT_PCM_CENTER) |
797 (1 << AC97_SLOT_PCM_SLEFT) |
798 (1 << AC97_SLOT_PCM_SRIGHT) |
799 (1 << AC97_SLOT_LFE),
800 },
Russell Kinga08d5652009-12-18 17:48:45 +0000801 [1] = {
802 .slots = (1 << AC97_SLOT_PCM_LEFT) |
803 (1 << AC97_SLOT_PCM_RIGHT) |
804 (1 << AC97_SLOT_PCM_LEFT_0) |
805 (1 << AC97_SLOT_PCM_RIGHT_0),
806 },
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200807 },
808 },
809 [1] = { /* PCM in */
810 .stream = 1,
811 .exclusive = 1,
812 .r = {
813 [0] = {
814 .slots = (1 << AC97_SLOT_PCM_LEFT) |
815 (1 << AC97_SLOT_PCM_RIGHT),
816 },
817 },
818 },
819 [2] = { /* Mic in */
820 .stream = 1,
821 .exclusive = 1,
822 .r = {
823 [0] = {
824 .slots = (1 << AC97_SLOT_MIC),
825 },
826 },
827 }
828};
829
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100830static struct snd_ac97_bus_ops aaci_bus_ops = {
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200831 .write = aaci_ac97_write,
832 .read = aaci_ac97_read,
833};
834
835static int __devinit aaci_probe_ac97(struct aaci *aaci)
836{
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100837 struct snd_ac97_template ac97_template;
838 struct snd_ac97_bus *ac97_bus;
839 struct snd_ac97 *ac97;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200840 int ret;
841
842 /*
843 * Assert AACIRESET for 2us
844 */
845 writel(0, aaci->base + AACI_RESET);
846 udelay(2);
847 writel(RESET_NRST, aaci->base + AACI_RESET);
848
849 /*
850 * Give the AC'97 codec more than enough time
851 * to wake up. (42us = ~2 frames at 48kHz.)
852 */
Russell King250c7a62011-01-12 23:42:57 +0000853 udelay(FRAME_PERIOD_US * 2);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200854
855 ret = snd_ac97_bus(aaci->card, 0, &aaci_bus_ops, aaci, &ac97_bus);
856 if (ret)
857 goto out;
858
859 ac97_bus->clock = 48000;
860 aaci->ac97_bus = ac97_bus;
861
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100862 memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200863 ac97_template.private_data = aaci;
864 ac97_template.num = 0;
865 ac97_template.scaps = AC97_SCAP_SKIP_MODEM;
866
867 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97);
868 if (ret)
869 goto out;
Kevin Hilman41762b82007-02-07 05:45:32 +0100870 aaci->ac97 = ac97;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200871
872 /*
873 * Disable AC97 PC Beep input on audio codecs.
874 */
875 if (ac97_is_audio(ac97))
876 snd_ac97_write_cache(ac97, AC97_PC_BEEP, 0x801e);
877
878 ret = snd_ac97_pcm_assign(ac97_bus, ARRAY_SIZE(ac97_defs), ac97_defs);
879 if (ret)
880 goto out;
881
882 aaci->playback.pcm = &ac97_bus->pcms[0];
Kevin Hilman41762b82007-02-07 05:45:32 +0100883 aaci->capture.pcm = &ac97_bus->pcms[1];
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200884
885 out:
886 return ret;
887}
888
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100889static void aaci_free_card(struct snd_card *card)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200890{
891 struct aaci *aaci = card->private_data;
892 if (aaci->base)
893 iounmap(aaci->base);
894}
895
896static struct aaci * __devinit aaci_init_card(struct amba_device *dev)
897{
898 struct aaci *aaci;
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100899 struct snd_card *card;
Takashi Iwaibd7dd772008-12-28 16:45:02 +0100900 int err;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200901
Takashi Iwaibd7dd772008-12-28 16:45:02 +0100902 err = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
903 THIS_MODULE, sizeof(struct aaci), &card);
904 if (err < 0)
Takashi Iwai631e8ad2008-09-01 15:31:50 +0200905 return NULL;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200906
907 card->private_free = aaci_free_card;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200908
909 strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver));
910 strlcpy(card->shortname, "ARM AC'97 Interface", sizeof(card->shortname));
911 snprintf(card->longname, sizeof(card->longname),
Russell Kingf006d8fc2011-01-12 23:46:03 +0000912 "%s PL%03x rev%u at 0x%08llx, irq %d",
913 card->shortname, amba_part(dev), amba_rev(dev),
914 (unsigned long long)dev->res.start, dev->irq[0]);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200915
916 aaci = card->private_data;
Ingo Molnar12aa7572006-01-16 16:36:05 +0100917 mutex_init(&aaci->ac97_sem);
Russell Kingb60fb512011-01-25 15:52:33 +0000918 mutex_init(&aaci->irq_lock);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200919 aaci->card = card;
920 aaci->dev = dev;
921
922 /* Set MAINCR to allow slot 1 and 2 data IO */
923 aaci->maincr = MAINCR_IE | MAINCR_SL1RXEN | MAINCR_SL1TXEN |
924 MAINCR_SL2RXEN | MAINCR_SL2TXEN;
925
926 return aaci;
927}
928
929static int __devinit aaci_init_pcm(struct aaci *aaci)
930{
Takashi Iwaiceb9e472005-11-17 15:10:16 +0100931 struct snd_pcm *pcm;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200932 int ret;
933
Kevin Hilman41762b82007-02-07 05:45:32 +0100934 ret = snd_pcm_new(aaci->card, "AACI AC'97", 0, 1, 1, &pcm);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200935 if (ret == 0) {
936 aaci->pcm = pcm;
937 pcm->private_data = aaci;
938 pcm->info_flags = 0;
939
940 strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
941
942 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &aaci_playback_ops);
Kevin Hilman41762b82007-02-07 05:45:32 +0100943 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &aaci_capture_ops);
Takashi Iwaid6797322009-11-26 15:08:54 +0100944 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
Takashi Iwaid4946432009-12-18 20:25:30 +0100945 NULL, 0, 64 * 1024);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200946 }
947
948 return ret;
949}
950
951static unsigned int __devinit aaci_size_fifo(struct aaci *aaci)
952{
Kevin Hilman41762b82007-02-07 05:45:32 +0100953 struct aaci_runtime *aacirun = &aaci->playback;
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200954 int i;
955
Russell King5d350cb2011-01-13 22:25:10 +0000956 /*
957 * Enable the channel, but don't assign it to any slots, so
958 * it won't empty onto the AC'97 link.
959 */
Kevin Hilman41762b82007-02-07 05:45:32 +0100960 writel(CR_FEN | CR_SZ16 | CR_EN, aacirun->base + AACI_TXCR);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200961
Kevin Hilman41762b82007-02-07 05:45:32 +0100962 for (i = 0; !(readl(aacirun->base + AACI_SR) & SR_TXFF) && i < 4096; i++)
963 writel(0, aacirun->fifo);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200964
Kevin Hilman41762b82007-02-07 05:45:32 +0100965 writel(0, aacirun->base + AACI_TXCR);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200966
967 /*
968 * Re-initialise the AACI after the FIFO depth test, to
969 * ensure that the FIFOs are empty. Unfortunately, merely
970 * disabling the channel doesn't clear the FIFO.
971 */
972 writel(aaci->maincr & ~MAINCR_IE, aaci->base + AACI_MAINCR);
Russell King7c289382011-02-05 10:41:55 +0000973 readl(aaci->base + AACI_MAINCR);
974 udelay(1);
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200975 writel(aaci->maincr, aaci->base + AACI_MAINCR);
976
977 /*
Russell King5d350cb2011-01-13 22:25:10 +0000978 * If we hit 4096 entries, we failed. Go back to the specified
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200979 * fifo depth.
980 */
981 if (i == 4096)
982 i = 8;
983
984 return i;
985}
986
Russell Kingaa25afa2011-02-19 15:55:00 +0000987static int __devinit aaci_probe(struct amba_device *dev,
988 const struct amba_id *id)
Russell Kingcb5a6ff2005-05-12 14:04:59 +0200989{
990 struct aaci *aaci;
991 int ret, i;
992
993 ret = amba_request_regions(dev, NULL);
994 if (ret)
995 return ret;
996
997 aaci = aaci_init_card(dev);
Takashi Iwai631e8ad2008-09-01 15:31:50 +0200998 if (!aaci) {
999 ret = -ENOMEM;
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001000 goto out;
1001 }
1002
Linus Walleijdc890c22009-06-07 23:27:31 +01001003 aaci->base = ioremap(dev->res.start, resource_size(&dev->res));
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001004 if (!aaci->base) {
1005 ret = -ENOMEM;
1006 goto out;
1007 }
1008
1009 /*
1010 * Playback uses AACI channel 0
1011 */
Russell Kingd6a89fe2009-12-18 17:48:50 +00001012 spin_lock_init(&aaci->playback.lock);
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001013 aaci->playback.base = aaci->base + AACI_CSCH1;
1014 aaci->playback.fifo = aaci->base + AACI_DR1;
1015
Kevin Hilman41762b82007-02-07 05:45:32 +01001016 /*
1017 * Capture uses AACI channel 0
1018 */
Russell Kingd6a89fe2009-12-18 17:48:50 +00001019 spin_lock_init(&aaci->capture.lock);
Kevin Hilman41762b82007-02-07 05:45:32 +01001020 aaci->capture.base = aaci->base + AACI_CSCH1;
1021 aaci->capture.fifo = aaci->base + AACI_DR1;
1022
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001023 for (i = 0; i < 4; i++) {
viro@ZenIV.linux.org.uke12ba642005-09-06 02:06:57 +01001024 void __iomem *base = aaci->base + i * 0x14;
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001025
1026 writel(0, base + AACI_IE);
1027 writel(0, base + AACI_TXCR);
1028 writel(0, base + AACI_RXCR);
1029 }
1030
1031 writel(0x1fff, aaci->base + AACI_INTCLR);
1032 writel(aaci->maincr, aaci->base + AACI_MAINCR);
Philby Johnb68b58f2010-03-26 21:37:51 +05301033 /*
1034 * Fix: ac97 read back fail errors by reading
1035 * from any arbitrary aaci register.
1036 */
1037 readl(aaci->base + AACI_CSCH1);
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001038 ret = aaci_probe_ac97(aaci);
1039 if (ret)
1040 goto out;
1041
Catalin Marinasf27f2182006-02-01 19:25:58 +00001042 /*
1043 * Size the FIFOs (must be multiple of 16).
Russell King5d350cb2011-01-13 22:25:10 +00001044 * This is the number of entries in the FIFO.
Catalin Marinasf27f2182006-02-01 19:25:58 +00001045 */
Russell King5d350cb2011-01-13 22:25:10 +00001046 aaci->fifo_depth = aaci_size_fifo(aaci);
1047 if (aaci->fifo_depth & 15) {
1048 printk(KERN_WARNING "AACI: FIFO depth %d not supported\n",
1049 aaci->fifo_depth);
Catalin Marinasf27f2182006-02-01 19:25:58 +00001050 ret = -ENODEV;
1051 goto out;
1052 }
1053
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001054 ret = aaci_init_pcm(aaci);
1055 if (ret)
1056 goto out;
1057
Takashi Iwaia76af192005-09-05 16:56:40 +02001058 snd_card_set_dev(aaci->card, &dev->dev);
1059
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001060 ret = snd_card_register(aaci->card);
1061 if (ret == 0) {
Russell King5d350cb2011-01-13 22:25:10 +00001062 dev_info(&dev->dev, "%s\n", aaci->card->longname);
1063 dev_info(&dev->dev, "FIFO %u entries\n", aaci->fifo_depth);
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001064 amba_set_drvdata(dev, aaci->card);
1065 return ret;
1066 }
1067
1068 out:
1069 if (aaci)
1070 snd_card_free(aaci->card);
1071 amba_release_regions(dev);
1072 return ret;
1073}
1074
1075static int __devexit aaci_remove(struct amba_device *dev)
1076{
Takashi Iwaiceb9e472005-11-17 15:10:16 +01001077 struct snd_card *card = amba_get_drvdata(dev);
Russell Kingcb5a6ff2005-05-12 14:04:59 +02001078
1079 amba_set_drvdata(dev, NULL);
1080
1081 if (card) {
1082 struct aaci *aaci = card->private_data;
1083 writel(0, aaci->base + AACI_MAINCR);
1084
1085 snd_card_free(card);
1086 amba_release_regions(dev);
1087 }
1088
1089 return 0;
1090}
1091
1092static struct amba_id aaci_ids[] = {
1093 {
1094 .id = 0x00041041,
1095 .mask = 0x000fffff,
1096 },
1097 { 0, 0 },
1098};
1099
1100static struct amba_driver aaci_driver = {
1101 .drv = {
1102 .name = DRIVER_NAME,
1103 },
1104 .probe = aaci_probe,
1105 .remove = __devexit_p(aaci_remove),
1106 .suspend = aaci_suspend,
1107 .resume = aaci_resume,
1108 .id_table = aaci_ids,
1109};
1110
1111static int __init aaci_init(void)
1112{
1113 return amba_driver_register(&aaci_driver);
1114}
1115
1116static void __exit aaci_exit(void)
1117{
1118 amba_driver_unregister(&aaci_driver);
1119}
1120
1121module_init(aaci_init);
1122module_exit(aaci_exit);
1123
1124MODULE_LICENSE("GPL");
1125MODULE_DESCRIPTION("ARM PrimeCell PL041 Advanced Audio CODEC Interface driver");