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authorJon Smirl <jonsmirl@gmail.com>2009-05-26 08:34:08 -0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-05-26 16:12:50 -0400
commitdbcc34756234596993a3b1304636f032e66d401f (patch)
treef1188f0c20ce402f778257bb0d905456ee213b14 /sound/soc
parent0f89bdcac61536c5cb2a095a514657019573afb4 (diff)
ASoC: Main rewite of the mpc5200 audio DMA code
Rewrite the mpc5200 audio DMA code to support both I2S and AC97. Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/fsl/Kconfig1
-rw-r--r--sound/soc/fsl/mpc5200_dma.c442
-rw-r--r--sound/soc/fsl/mpc5200_dma.h33
-rw-r--r--sound/soc/fsl/mpc5200_psc_i2s.c247
-rw-r--r--sound/soc/fsl/mpc5200_psc_i2s.h12
5 files changed, 344 insertions, 391 deletions
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index dc79bdf33692..1918c78b858e 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -25,7 +25,6 @@ config SND_SOC_MPC8610_HPCD
25config SND_SOC_MPC5200_I2S 25config SND_SOC_MPC5200_I2S
26 tristate "Freescale MPC5200 PSC in I2S mode driver" 26 tristate "Freescale MPC5200 PSC in I2S mode driver"
27 depends on PPC_MPC52xx && PPC_BESTCOMM 27 depends on PPC_MPC52xx && PPC_BESTCOMM
28 select SND_SOC_OF_SIMPLE
29 select SND_MPC52xx_DMA 28 select SND_MPC52xx_DMA
30 select PPC_BESTCOMM_GEN_BD 29 select PPC_BESTCOMM_GEN_BD
31 help 30 help
diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c
index 685039213f05..efec33a1c5bd 100644
--- a/sound/soc/fsl/mpc5200_dma.c
+++ b/sound/soc/fsl/mpc5200_dma.c
@@ -3,23 +3,13 @@
3 * ALSA SoC Platform driver 3 * ALSA SoC Platform driver
4 * 4 *
5 * Copyright (C) 2008 Secret Lab Technologies Ltd. 5 * Copyright (C) 2008 Secret Lab Technologies Ltd.
6 * Copyright (C) 2009 Jon Smirl, Digispeaker
6 */ 7 */
7 8
8#include <linux/init.h>
9#include <linux/module.h> 9#include <linux/module.h>
10#include <linux/interrupt.h>
11#include <linux/device.h>
12#include <linux/delay.h>
13#include <linux/of_device.h> 10#include <linux/of_device.h>
14#include <linux/of_platform.h>
15#include <linux/dma-mapping.h>
16 11
17#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/initval.h>
21#include <sound/soc.h> 12#include <sound/soc.h>
22#include <sound/soc-of-simple.h>
23 13
24#include <sysdev/bestcomm/bestcomm.h> 14#include <sysdev/bestcomm/bestcomm.h>
25#include <sysdev/bestcomm/gen_bd.h> 15#include <sysdev/bestcomm/gen_bd.h>
@@ -27,10 +17,6 @@
27 17
28#include "mpc5200_dma.h" 18#include "mpc5200_dma.h"
29 19
30MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
31MODULE_DESCRIPTION("Freescale MPC5200 PSC in DMA mode ASoC Driver");
32MODULE_LICENSE("GPL");
33
34/* 20/*
35 * Interrupt handlers 21 * Interrupt handlers
36 */ 22 */
@@ -50,7 +36,7 @@ static irqreturn_t psc_dma_status_irq(int irq, void *_psc_dma)
50 if (psc_dma->capture.active && (isr & MPC52xx_PSC_IMR_ORERR)) 36 if (psc_dma->capture.active && (isr & MPC52xx_PSC_IMR_ORERR))
51 psc_dma->stats.overrun_count++; 37 psc_dma->stats.overrun_count++;
52 38
53 out_8(&regs->command, 4 << 4); /* reset the error status */ 39 out_8(&regs->command, MPC52xx_PSC_RST_ERR_STAT);
54 40
55 return IRQ_HANDLED; 41 return IRQ_HANDLED;
56} 42}
@@ -81,21 +67,36 @@ static void psc_dma_bcom_enqueue_next_buffer(struct psc_dma_stream *s)
81 s->period_next_pt = s->period_start; 67 s->period_next_pt = s->period_start;
82} 68}
83 69
70static void psc_dma_bcom_enqueue_tx(struct psc_dma_stream *s)
71{
72 while (s->appl_ptr < s->runtime->control->appl_ptr) {
73
74 if (bcom_queue_full(s->bcom_task))
75 return;
76
77 s->appl_ptr += s->period_size;
78
79 psc_dma_bcom_enqueue_next_buffer(s);
80 }
81}
82
84/* Bestcomm DMA irq handler */ 83/* Bestcomm DMA irq handler */
85static irqreturn_t psc_dma_bcom_irq(int irq, void *_psc_dma_stream) 84static irqreturn_t psc_dma_bcom_irq_tx(int irq, void *_psc_dma_stream)
86{ 85{
87 struct psc_dma_stream *s = _psc_dma_stream; 86 struct psc_dma_stream *s = _psc_dma_stream;
88 87
88 spin_lock(&s->psc_dma->lock);
89 /* For each finished period, dequeue the completed period buffer 89 /* For each finished period, dequeue the completed period buffer
90 * and enqueue a new one in it's place. */ 90 * and enqueue a new one in it's place. */
91 while (bcom_buffer_done(s->bcom_task)) { 91 while (bcom_buffer_done(s->bcom_task)) {
92 bcom_retrieve_buffer(s->bcom_task, NULL, NULL); 92 bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
93
93 s->period_current_pt += s->period_bytes; 94 s->period_current_pt += s->period_bytes;
94 if (s->period_current_pt >= s->period_end) 95 if (s->period_current_pt >= s->period_end)
95 s->period_current_pt = s->period_start; 96 s->period_current_pt = s->period_start;
96 psc_dma_bcom_enqueue_next_buffer(s);
97 bcom_enable(s->bcom_task);
98 } 97 }
98 psc_dma_bcom_enqueue_tx(s);
99 spin_unlock(&s->psc_dma->lock);
99 100
100 /* If the stream is active, then also inform the PCM middle layer 101 /* If the stream is active, then also inform the PCM middle layer
101 * of the period finished event. */ 102 * of the period finished event. */
@@ -105,49 +106,33 @@ static irqreturn_t psc_dma_bcom_irq(int irq, void *_psc_dma_stream)
105 return IRQ_HANDLED; 106 return IRQ_HANDLED;
106} 107}
107 108
108/** 109static irqreturn_t psc_dma_bcom_irq_rx(int irq, void *_psc_dma_stream)
109 * psc_dma_startup: create a new substream
110 *
111 * This is the first function called when a stream is opened.
112 *
113 * If this is the first stream open, then grab the IRQ and program most of
114 * the PSC registers.
115 */
116int psc_dma_startup(struct snd_pcm_substream *substream,
117 struct snd_soc_dai *dai)
118{ 110{
119 struct snd_soc_pcm_runtime *rtd = substream->private_data; 111 struct psc_dma_stream *s = _psc_dma_stream;
120 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
121 int rc;
122 112
123 dev_dbg(psc_dma->dev, "psc_dma_startup(substream=%p)\n", substream); 113 spin_lock(&s->psc_dma->lock);
114 /* For each finished period, dequeue the completed period buffer
115 * and enqueue a new one in it's place. */
116 while (bcom_buffer_done(s->bcom_task)) {
117 bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
124 118
125 if (!psc_dma->playback.active && 119 s->period_current_pt += s->period_bytes;
126 !psc_dma->capture.active) { 120 if (s->period_current_pt >= s->period_end)
127 /* Setup the IRQs */ 121 s->period_current_pt = s->period_start;
128 rc = request_irq(psc_dma->irq, &psc_dma_status_irq, IRQF_SHARED, 122
129 "psc-dma-status", psc_dma); 123 psc_dma_bcom_enqueue_next_buffer(s);
130 rc |= request_irq(psc_dma->capture.irq,
131 &psc_dma_bcom_irq, IRQF_SHARED,
132 "psc-dma-capture", &psc_dma->capture);
133 rc |= request_irq(psc_dma->playback.irq,
134 &psc_dma_bcom_irq, IRQF_SHARED,
135 "psc-dma-playback", &psc_dma->playback);
136 if (rc) {
137 free_irq(psc_dma->irq, psc_dma);
138 free_irq(psc_dma->capture.irq,
139 &psc_dma->capture);
140 free_irq(psc_dma->playback.irq,
141 &psc_dma->playback);
142 return -ENODEV;
143 }
144 } 124 }
125 spin_unlock(&s->psc_dma->lock);
145 126
146 return 0; 127 /* If the stream is active, then also inform the PCM middle layer
128 * of the period finished event. */
129 if (s->active)
130 snd_pcm_period_elapsed(s->stream);
131
132 return IRQ_HANDLED;
147} 133}
148 134
149int psc_dma_hw_free(struct snd_pcm_substream *substream, 135static int psc_dma_hw_free(struct snd_pcm_substream *substream)
150 struct snd_soc_dai *dai)
151{ 136{
152 snd_pcm_set_runtime_buffer(substream, NULL); 137 snd_pcm_set_runtime_buffer(substream, NULL);
153 return 0; 138 return 0;
@@ -159,8 +144,7 @@ int psc_dma_hw_free(struct snd_pcm_substream *substream,
159 * This function is called by ALSA to start, stop, pause, and resume the DMA 144 * This function is called by ALSA to start, stop, pause, and resume the DMA
160 * transfer of data. 145 * transfer of data.
161 */ 146 */
162int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd, 147static int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd)
163 struct snd_soc_dai *dai)
164{ 148{
165 struct snd_soc_pcm_runtime *rtd = substream->private_data; 149 struct snd_soc_pcm_runtime *rtd = substream->private_data;
166 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; 150 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
@@ -168,8 +152,8 @@ int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd,
168 struct psc_dma_stream *s; 152 struct psc_dma_stream *s;
169 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs; 153 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
170 u16 imr; 154 u16 imr;
171 u8 psc_cmd;
172 unsigned long flags; 155 unsigned long flags;
156 int i;
173 157
174 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) 158 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
175 s = &psc_dma->capture; 159 s = &psc_dma->capture;
@@ -189,68 +173,48 @@ int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd,
189 (s->period_bytes * runtime->periods); 173 (s->period_bytes * runtime->periods);
190 s->period_next_pt = s->period_start; 174 s->period_next_pt = s->period_start;
191 s->period_current_pt = s->period_start; 175 s->period_current_pt = s->period_start;
176 s->period_size = runtime->period_size;
192 s->active = 1; 177 s->active = 1;
193 178
194 /* First; reset everything */ 179 /* track appl_ptr so that we have a better chance of detecting
180 * end of stream and not over running it.
181 */
182 s->runtime = runtime;
183 s->appl_ptr = s->runtime->control->appl_ptr -
184 (runtime->period_size * runtime->periods);
185
186 /* Fill up the bestcomm bd queue and enable DMA.
187 * This will begin filling the PSC's fifo.
188 */
189 spin_lock_irqsave(&psc_dma->lock, flags);
190
195 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) { 191 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
196 out_8(&regs->command, MPC52xx_PSC_RST_RX); 192 bcom_gen_bd_rx_reset(s->bcom_task);
197 out_8(&regs->command, MPC52xx_PSC_RST_ERR_STAT); 193 for (i = 0; i < runtime->periods; i++)
194 if (!bcom_queue_full(s->bcom_task))
195 psc_dma_bcom_enqueue_next_buffer(s);
198 } else { 196 } else {
199 out_8(&regs->command, MPC52xx_PSC_RST_TX); 197 bcom_gen_bd_tx_reset(s->bcom_task);
200 out_8(&regs->command, MPC52xx_PSC_RST_ERR_STAT); 198 psc_dma_bcom_enqueue_tx(s);
201 } 199 }
202 200
203 /* Next, fill up the bestcomm bd queue and enable DMA.
204 * This will begin filling the PSC's fifo. */
205 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
206 bcom_gen_bd_rx_reset(s->bcom_task);
207 else
208 bcom_gen_bd_tx_reset(s->bcom_task);
209 while (!bcom_queue_full(s->bcom_task))
210 psc_dma_bcom_enqueue_next_buffer(s);
211 bcom_enable(s->bcom_task); 201 bcom_enable(s->bcom_task);
212
213 /* Due to errata in the dma mode; need to line up enabling
214 * the transmitter with a transition on the frame sync
215 * line */
216
217 spin_lock_irqsave(&psc_dma->lock, flags);
218 /* first make sure it is low */
219 while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) != 0)
220 ;
221 /* then wait for the transition to high */
222 while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) == 0)
223 ;
224 /* Finally, enable the PSC.
225 * Receiver must always be enabled; even when we only want
226 * transmit. (see 15.3.2.3 of MPC5200B User's Guide) */
227 psc_cmd = MPC52xx_PSC_RX_ENABLE;
228 if (substream->pstr->stream == SNDRV_PCM_STREAM_PLAYBACK)
229 psc_cmd |= MPC52xx_PSC_TX_ENABLE;
230 out_8(&regs->command, psc_cmd);
231 spin_unlock_irqrestore(&psc_dma->lock, flags); 202 spin_unlock_irqrestore(&psc_dma->lock, flags);
232 203
204 out_8(&regs->command, MPC52xx_PSC_RST_ERR_STAT);
205
233 break; 206 break;
234 207
235 case SNDRV_PCM_TRIGGER_STOP: 208 case SNDRV_PCM_TRIGGER_STOP:
236 /* Turn off the PSC */
237 s->active = 0; 209 s->active = 0;
238 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
239 if (!psc_dma->playback.active) {
240 out_8(&regs->command, 2 << 4); /* reset rx */
241 out_8(&regs->command, 3 << 4); /* reset tx */
242 out_8(&regs->command, 4 << 4); /* reset err */
243 }
244 } else {
245 out_8(&regs->command, 3 << 4); /* reset tx */
246 out_8(&regs->command, 4 << 4); /* reset err */
247 if (!psc_dma->capture.active)
248 out_8(&regs->command, 2 << 4); /* reset rx */
249 }
250 210
211 spin_lock_irqsave(&psc_dma->lock, flags);
251 bcom_disable(s->bcom_task); 212 bcom_disable(s->bcom_task);
252 while (!bcom_queue_empty(s->bcom_task)) 213 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
253 bcom_retrieve_buffer(s->bcom_task, NULL, NULL); 214 bcom_gen_bd_rx_reset(s->bcom_task);
215 else
216 bcom_gen_bd_tx_reset(s->bcom_task);
217 spin_unlock_irqrestore(&psc_dma->lock, flags);
254 218
255 break; 219 break;
256 220
@@ -265,44 +229,11 @@ int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd,
265 imr |= MPC52xx_PSC_IMR_TXEMP; 229 imr |= MPC52xx_PSC_IMR_TXEMP;
266 if (psc_dma->capture.active) 230 if (psc_dma->capture.active)
267 imr |= MPC52xx_PSC_IMR_ORERR; 231 imr |= MPC52xx_PSC_IMR_ORERR;
268 out_be16(&regs->isr_imr.imr, imr); 232 out_be16(&regs->isr_imr.imr, psc_dma->imr | imr);
269 233
270 return 0; 234 return 0;
271} 235}
272 236
273/**
274 * psc_dma_shutdown: shutdown the data transfer on a stream
275 *
276 * Shutdown the PSC if there are no other substreams open.
277 */
278void psc_dma_shutdown(struct snd_pcm_substream *substream,
279 struct snd_soc_dai *dai)
280{
281 struct snd_soc_pcm_runtime *rtd = substream->private_data;
282 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
283
284 dev_dbg(psc_dma->dev, "psc_dma_shutdown(substream=%p)\n", substream);
285
286 /*
287 * If this is the last active substream, disable the PSC and release
288 * the IRQ.
289 */
290 if (!psc_dma->playback.active &&
291 !psc_dma->capture.active) {
292
293 /* Disable all interrupts and reset the PSC */
294 out_be16(&psc_dma->psc_regs->isr_imr.imr, 0);
295 out_8(&psc_dma->psc_regs->command, 3 << 4); /* reset tx */
296 out_8(&psc_dma->psc_regs->command, 2 << 4); /* reset rx */
297 out_8(&psc_dma->psc_regs->command, 1 << 4); /* reset mode */
298 out_8(&psc_dma->psc_regs->command, 4 << 4); /* reset error */
299
300 /* Release irqs */
301 free_irq(psc_dma->irq, psc_dma);
302 free_irq(psc_dma->capture.irq, &psc_dma->capture);
303 free_irq(psc_dma->playback.irq, &psc_dma->playback);
304 }
305}
306 237
307/* --------------------------------------------------------------------- 238/* ---------------------------------------------------------------------
308 * The PSC DMA 'ASoC platform' driver 239 * The PSC DMA 'ASoC platform' driver
@@ -312,62 +243,78 @@ void psc_dma_shutdown(struct snd_pcm_substream *substream,
312 * interaction with the attached codec 243 * interaction with the attached codec
313 */ 244 */
314 245
315static const struct snd_pcm_hardware psc_dma_pcm_hardware = { 246static const struct snd_pcm_hardware psc_dma_hardware = {
316 .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 247 .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
317 SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | 248 SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
318 SNDRV_PCM_INFO_BATCH, 249 SNDRV_PCM_INFO_BATCH,
319 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | 250 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |
320 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE, 251 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE,
321 .rate_min = 8000, 252 .rate_min = 8000,
322 .rate_max = 48000, 253 .rate_max = 48000,
323 .channels_min = 2, 254 .channels_min = 1,
324 .channels_max = 2, 255 .channels_max = 2,
325 .period_bytes_max = 1024 * 1024, 256 .period_bytes_max = 1024 * 1024,
326 .period_bytes_min = 32, 257 .period_bytes_min = 32,
327 .periods_min = 2, 258 .periods_min = 2,
328 .periods_max = 256, 259 .periods_max = 256,
329 .buffer_bytes_max = 2 * 1024 * 1024, 260 .buffer_bytes_max = 2 * 1024 * 1024,
330 .fifo_size = 0, 261 .fifo_size = 512,
331}; 262};
332 263
333static int psc_dma_pcm_open(struct snd_pcm_substream *substream) 264static int psc_dma_open(struct snd_pcm_substream *substream)
334{ 265{
266 struct snd_pcm_runtime *runtime = substream->runtime;
335 struct snd_soc_pcm_runtime *rtd = substream->private_data; 267 struct snd_soc_pcm_runtime *rtd = substream->private_data;
336 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; 268 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
337 struct psc_dma_stream *s; 269 struct psc_dma_stream *s;
270 int rc;
338 271
339 dev_dbg(psc_dma->dev, "psc_dma_pcm_open(substream=%p)\n", substream); 272 dev_dbg(psc_dma->dev, "psc_dma_open(substream=%p)\n", substream);
340 273
341 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) 274 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
342 s = &psc_dma->capture; 275 s = &psc_dma->capture;
343 else 276 else
344 s = &psc_dma->playback; 277 s = &psc_dma->playback;
345 278
346 snd_soc_set_runtime_hwparams(substream, &psc_dma_pcm_hardware); 279 snd_soc_set_runtime_hwparams(substream, &psc_dma_hardware);
280
281 rc = snd_pcm_hw_constraint_integer(runtime,
282 SNDRV_PCM_HW_PARAM_PERIODS);
283 if (rc < 0) {
284 dev_err(substream->pcm->card->dev, "invalid buffer size\n");
285 return rc;
286 }
347 287
348 s->stream = substream; 288 s->stream = substream;
349 return 0; 289 return 0;
350} 290}
351 291
352static int psc_dma_pcm_close(struct snd_pcm_substream *substream) 292static int psc_dma_close(struct snd_pcm_substream *substream)
353{ 293{
354 struct snd_soc_pcm_runtime *rtd = substream->private_data; 294 struct snd_soc_pcm_runtime *rtd = substream->private_data;
355 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; 295 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
356 struct psc_dma_stream *s; 296 struct psc_dma_stream *s;
357 297
358 dev_dbg(psc_dma->dev, "psc_dma_pcm_close(substream=%p)\n", substream); 298 dev_dbg(psc_dma->dev, "psc_dma_close(substream=%p)\n", substream);
359 299
360 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) 300 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
361 s = &psc_dma->capture; 301 s = &psc_dma->capture;
362 else 302 else
363 s = &psc_dma->playback; 303 s = &psc_dma->playback;
364 304
305 if (!psc_dma->playback.active &&
306 !psc_dma->capture.active) {
307
308 /* Disable all interrupts and reset the PSC */
309 out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr);
310 out_8(&psc_dma->psc_regs->command, 4 << 4); /* reset error */
311 }
365 s->stream = NULL; 312 s->stream = NULL;
366 return 0; 313 return 0;
367} 314}
368 315
369static snd_pcm_uframes_t 316static snd_pcm_uframes_t
370psc_dma_pcm_pointer(struct snd_pcm_substream *substream) 317psc_dma_pointer(struct snd_pcm_substream *substream)
371{ 318{
372 struct snd_soc_pcm_runtime *rtd = substream->private_data; 319 struct snd_soc_pcm_runtime *rtd = substream->private_data;
373 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; 320 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
@@ -384,60 +331,78 @@ psc_dma_pcm_pointer(struct snd_pcm_substream *substream)
384 return bytes_to_frames(substream->runtime, count); 331 return bytes_to_frames(substream->runtime, count);
385} 332}
386 333
387static struct snd_pcm_ops psc_dma_pcm_ops = { 334static int
388 .open = psc_dma_pcm_open, 335psc_dma_hw_params(struct snd_pcm_substream *substream,
389 .close = psc_dma_pcm_close, 336 struct snd_pcm_hw_params *params)
337{
338 snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
339
340 return 0;
341}
342
343static struct snd_pcm_ops psc_dma_ops = {
344 .open = psc_dma_open,
345 .close = psc_dma_close,
346 .hw_free = psc_dma_hw_free,
390 .ioctl = snd_pcm_lib_ioctl, 347 .ioctl = snd_pcm_lib_ioctl,
391 .pointer = psc_dma_pcm_pointer, 348 .pointer = psc_dma_pointer,
349 .trigger = psc_dma_trigger,
350 .hw_params = psc_dma_hw_params,
392}; 351};
393 352
394static u64 psc_dma_pcm_dmamask = 0xffffffff; 353static u64 psc_dma_dmamask = 0xffffffff;
395static int psc_dma_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, 354static int psc_dma_new(struct snd_card *card, struct snd_soc_dai *dai,
396 struct snd_pcm *pcm) 355 struct snd_pcm *pcm)
397{ 356{
398 struct snd_soc_pcm_runtime *rtd = pcm->private_data; 357 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
399 size_t size = psc_dma_pcm_hardware.buffer_bytes_max; 358 struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
359 size_t size = psc_dma_hardware.buffer_bytes_max;
400 int rc = 0; 360 int rc = 0;
401 361
402 dev_dbg(rtd->socdev->dev, "psc_dma_pcm_new(card=%p, dai=%p, pcm=%p)\n", 362 dev_dbg(rtd->socdev->dev, "psc_dma_new(card=%p, dai=%p, pcm=%p)\n",
403 card, dai, pcm); 363 card, dai, pcm);
404 364
405 if (!card->dev->dma_mask) 365 if (!card->dev->dma_mask)
406 card->dev->dma_mask = &psc_dma_pcm_dmamask; 366 card->dev->dma_mask = &psc_dma_dmamask;
407 if (!card->dev->coherent_dma_mask) 367 if (!card->dev->coherent_dma_mask)
408 card->dev->coherent_dma_mask = 0xffffffff; 368 card->dev->coherent_dma_mask = 0xffffffff;
409 369
410 if (pcm->streams[0].substream) { 370 if (pcm->streams[0].substream) {
411 rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size, 371 rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
412 &pcm->streams[0].substream->dma_buffer); 372 size, &pcm->streams[0].substream->dma_buffer);
413 if (rc) 373 if (rc)
414 goto playback_alloc_err; 374 goto playback_alloc_err;
415 } 375 }
416 376
417 if (pcm->streams[1].substream) { 377 if (pcm->streams[1].substream) {
418 rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size, 378 rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
419 &pcm->streams[1].substream->dma_buffer); 379 size, &pcm->streams[1].substream->dma_buffer);
420 if (rc) 380 if (rc)
421 goto capture_alloc_err; 381 goto capture_alloc_err;
422 } 382 }
423 383
384 if (rtd->socdev->card->codec->ac97)
385 rtd->socdev->card->codec->ac97->private_data = psc_dma;
386
424 return 0; 387 return 0;
425 388
426 capture_alloc_err: 389 capture_alloc_err:
427 if (pcm->streams[0].substream) 390 if (pcm->streams[0].substream)
428 snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer); 391 snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer);
392
429 playback_alloc_err: 393 playback_alloc_err:
430 dev_err(card->dev, "Cannot allocate buffer(s)\n"); 394 dev_err(card->dev, "Cannot allocate buffer(s)\n");
395
431 return -ENOMEM; 396 return -ENOMEM;
432} 397}
433 398
434static void psc_dma_pcm_free(struct snd_pcm *pcm) 399static void psc_dma_free(struct snd_pcm *pcm)
435{ 400{
436 struct snd_soc_pcm_runtime *rtd = pcm->private_data; 401 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
437 struct snd_pcm_substream *substream; 402 struct snd_pcm_substream *substream;
438 int stream; 403 int stream;
439 404
440 dev_dbg(rtd->socdev->dev, "psc_dma_pcm_free(pcm=%p)\n", pcm); 405 dev_dbg(rtd->socdev->dev, "psc_dma_free(pcm=%p)\n", pcm);
441 406
442 for (stream = 0; stream < 2; stream++) { 407 for (stream = 0; stream < 2; stream++) {
443 substream = pcm->streams[stream].substream; 408 substream = pcm->streams[stream].substream;
@@ -449,10 +414,151 @@ static void psc_dma_pcm_free(struct snd_pcm *pcm)
449 } 414 }
450} 415}
451 416
452struct snd_soc_platform psc_dma_pcm_soc_platform = { 417struct snd_soc_platform mpc5200_audio_dma_platform = {
453 .name = "mpc5200-psc-audio", 418 .name = "mpc5200-psc-audio",
454 .pcm_ops = &psc_dma_pcm_ops, 419 .pcm_ops = &psc_dma_ops,
455 .pcm_new = &psc_dma_pcm_new, 420 .pcm_new = &psc_dma_new,
456 .pcm_free = &psc_dma_pcm_free, 421 .pcm_free = &psc_dma_free,
457}; 422};
423EXPORT_SYMBOL_GPL(mpc5200_audio_dma_platform);
424
425int mpc5200_audio_dma_create(struct of_device *op)
426{
427 phys_addr_t fifo;
428 struct psc_dma *psc_dma;
429 struct resource res;
430 int size, irq, rc;
431 const __be32 *prop;
432 void __iomem *regs;
433
434 /* Fetch the registers and IRQ of the PSC */
435 irq = irq_of_parse_and_map(op->node, 0);
436 if (of_address_to_resource(op->node, 0, &res)) {
437 dev_err(&op->dev, "Missing reg property\n");
438 return -ENODEV;
439 }
440 regs = ioremap(res.start, 1 + res.end - res.start);
441 if (!regs) {
442 dev_err(&op->dev, "Could not map registers\n");
443 return -ENODEV;
444 }
445
446 /* Allocate and initialize the driver private data */
447 psc_dma = kzalloc(sizeof *psc_dma, GFP_KERNEL);
448 if (!psc_dma) {
449 iounmap(regs);
450 return -ENOMEM;
451 }
452
453 /* Get the PSC ID */
454 prop = of_get_property(op->node, "cell-index", &size);
455 if (!prop || size < sizeof *prop)
456 return -ENODEV;
457
458 spin_lock_init(&psc_dma->lock);
459 psc_dma->id = be32_to_cpu(*prop);
460 psc_dma->irq = irq;
461 psc_dma->psc_regs = regs;
462 psc_dma->fifo_regs = regs + sizeof *psc_dma->psc_regs;
463 psc_dma->dev = &op->dev;
464 psc_dma->playback.psc_dma = psc_dma;
465 psc_dma->capture.psc_dma = psc_dma;
466 snprintf(psc_dma->name, sizeof psc_dma->name, "PSC%u", psc_dma->id);
467
468 /* Find the address of the fifo data registers and setup the
469 * DMA tasks */
470 fifo = res.start + offsetof(struct mpc52xx_psc, buffer.buffer_32);
471 psc_dma->capture.bcom_task =
472 bcom_psc_gen_bd_rx_init(psc_dma->id, 10, fifo, 512);
473 psc_dma->playback.bcom_task =
474 bcom_psc_gen_bd_tx_init(psc_dma->id, 10, fifo);
475 if (!psc_dma->capture.bcom_task ||
476 !psc_dma->playback.bcom_task) {
477 dev_err(&op->dev, "Could not allocate bestcomm tasks\n");
478 iounmap(regs);
479 kfree(psc_dma);
480 return -ENODEV;
481 }
482
483 /* Disable all interrupts and reset the PSC */
484 out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr);
485 /* reset receiver */
486 out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_RX);
487 /* reset transmitter */
488 out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_TX);
489 /* reset error */
490 out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_ERR_STAT);
491 /* reset mode */
492 out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_SEL_MODE_REG_1);
493
494 /* Set up mode register;
495 * First write: RxRdy (FIFO Alarm) generates rx FIFO irq
496 * Second write: register Normal mode for non loopback
497 */
498 out_8(&psc_dma->psc_regs->mode, 0);
499 out_8(&psc_dma->psc_regs->mode, 0);
500
501 /* Set the TX and RX fifo alarm thresholds */
502 out_be16(&psc_dma->fifo_regs->rfalarm, 0x100);
503 out_8(&psc_dma->fifo_regs->rfcntl, 0x4);
504 out_be16(&psc_dma->fifo_regs->tfalarm, 0x100);
505 out_8(&psc_dma->fifo_regs->tfcntl, 0x7);
506
507 /* Lookup the IRQ numbers */
508 psc_dma->playback.irq =
509 bcom_get_task_irq(psc_dma->playback.bcom_task);
510 psc_dma->capture.irq =
511 bcom_get_task_irq(psc_dma->capture.bcom_task);
512
513 rc = request_irq(psc_dma->irq, &psc_dma_status_irq, IRQF_SHARED,
514 "psc-dma-status", psc_dma);
515 rc |= request_irq(psc_dma->capture.irq,
516 &psc_dma_bcom_irq_rx, IRQF_SHARED,
517 "psc-dma-capture", &psc_dma->capture);
518 rc |= request_irq(psc_dma->playback.irq,
519 &psc_dma_bcom_irq_tx, IRQF_SHARED,
520 "psc-dma-playback", &psc_dma->playback);
521 if (rc) {
522 free_irq(psc_dma->irq, psc_dma);
523 free_irq(psc_dma->capture.irq,
524 &psc_dma->capture);
525 free_irq(psc_dma->playback.irq,
526 &psc_dma->playback);
527 return -ENODEV;
528 }
458 529
530 /* Save what we've done so it can be found again later */
531 dev_set_drvdata(&op->dev, psc_dma);
532
533 /* Tell the ASoC OF helpers about it */
534 return snd_soc_register_platform(&mpc5200_audio_dma_platform);
535}
536EXPORT_SYMBOL_GPL(mpc5200_audio_dma_create);
537
538int mpc5200_audio_dma_destroy(struct of_device *op)
539{
540 struct psc_dma *psc_dma = dev_get_drvdata(&op->dev);
541
542 dev_dbg(&op->dev, "mpc5200_audio_dma_destroy()\n");
543
544 snd_soc_unregister_platform(&mpc5200_audio_dma_platform);
545
546 bcom_gen_bd_rx_release(psc_dma->capture.bcom_task);
547 bcom_gen_bd_tx_release(psc_dma->playback.bcom_task);
548
549 /* Release irqs */
550 free_irq(psc_dma->irq, psc_dma);
551 free_irq(psc_dma->capture.irq, &psc_dma->capture);
552 free_irq(psc_dma->playback.irq, &psc_dma->playback);
553
554 iounmap(psc_dma->psc_regs);
555 kfree(psc_dma);
556 dev_set_drvdata(&op->dev, NULL);
557
558 return 0;
559}
560EXPORT_SYMBOL_GPL(mpc5200_audio_dma_destroy);
561
562MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
563MODULE_DESCRIPTION("Freescale MPC5200 PSC in DMA mode ASoC Driver");
564MODULE_LICENSE("GPL");
diff --git a/sound/soc/fsl/mpc5200_dma.h b/sound/soc/fsl/mpc5200_dma.h
index a33232c0c59e..2000803f06a7 100644
--- a/sound/soc/fsl/mpc5200_dma.h
+++ b/sound/soc/fsl/mpc5200_dma.h
@@ -5,8 +5,10 @@
5#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__ 5#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
6#define __SOUND_SOC_FSL_MPC5200_DMA_H__ 6#define __SOUND_SOC_FSL_MPC5200_DMA_H__
7 7
8#define PSC_STREAM_NAME_LEN 32
9
8/** 10/**
9 * psc_dma_stream - Data specific to a single stream (playback or capture) 11 * psc_ac97_stream - Data specific to a single stream (playback or capture)
10 * @active: flag indicating if the stream is active 12 * @active: flag indicating if the stream is active
11 * @psc_dma: pointer back to parent psc_dma data structure 13 * @psc_dma: pointer back to parent psc_dma data structure
12 * @bcom_task: bestcomm task structure 14 * @bcom_task: bestcomm task structure
@@ -17,6 +19,9 @@
17 * @period_bytes: size of DMA period in bytes 19 * @period_bytes: size of DMA period in bytes
18 */ 20 */
19struct psc_dma_stream { 21struct psc_dma_stream {
22 struct snd_pcm_runtime *runtime;
23 snd_pcm_uframes_t appl_ptr;
24
20 int active; 25 int active;
21 struct psc_dma *psc_dma; 26 struct psc_dma *psc_dma;
22 struct bcom_task *bcom_task; 27 struct bcom_task *bcom_task;
@@ -27,6 +32,7 @@ struct psc_dma_stream {
27 dma_addr_t period_next_pt; 32 dma_addr_t period_next_pt;
28 dma_addr_t period_current_pt; 33 dma_addr_t period_current_pt;
29 int period_bytes; 34 int period_bytes;
35 int period_size;
30}; 36};
31 37
32/** 38/**
@@ -48,9 +54,12 @@ struct psc_dma {
48 struct mpc52xx_psc_fifo __iomem *fifo_regs; 54 struct mpc52xx_psc_fifo __iomem *fifo_regs;
49 unsigned int irq; 55 unsigned int irq;
50 struct device *dev; 56 struct device *dev;
51 struct snd_soc_dai dai;
52 spinlock_t lock; 57 spinlock_t lock;
53 u32 sicr; 58 u32 sicr;
59 uint sysclk;
60 int imr;
61 int id;
62 unsigned int slots;
54 63
55 /* per-stream data */ 64 /* per-stream data */
56 struct psc_dma_stream playback; 65 struct psc_dma_stream playback;
@@ -58,24 +67,14 @@ struct psc_dma {
58 67
59 /* Statistics */ 68 /* Statistics */
60 struct { 69 struct {
61 int overrun_count; 70 unsigned long overrun_count;
62 int underrun_count; 71 unsigned long underrun_count;
63 } stats; 72 } stats;
64}; 73};
65 74
75int mpc5200_audio_dma_create(struct of_device *op);
76int mpc5200_audio_dma_destroy(struct of_device *op);
66 77
67int psc_dma_startup(struct snd_pcm_substream *substream, 78extern struct snd_soc_platform mpc5200_audio_dma_platform;
68 struct snd_soc_dai *dai);
69
70int psc_dma_hw_free(struct snd_pcm_substream *substream,
71 struct snd_soc_dai *dai);
72
73void psc_dma_shutdown(struct snd_pcm_substream *substream,
74 struct snd_soc_dai *dai);
75
76int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd,
77 struct snd_soc_dai *dai);
78
79extern struct snd_soc_platform psc_dma_pcm_soc_platform;
80 79
81#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */ 80#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */
diff --git a/sound/soc/fsl/mpc5200_psc_i2s.c b/sound/soc/fsl/mpc5200_psc_i2s.c
index 12a7917b57b0..ce8de90fb94a 100644
--- a/sound/soc/fsl/mpc5200_psc_i2s.c
+++ b/sound/soc/fsl/mpc5200_psc_i2s.c
@@ -3,34 +3,22 @@
3 * ALSA SoC Digital Audio Interface (DAI) driver 3 * ALSA SoC Digital Audio Interface (DAI) driver
4 * 4 *
5 * Copyright (C) 2008 Secret Lab Technologies Ltd. 5 * Copyright (C) 2008 Secret Lab Technologies Ltd.
6 * Copyright (C) 2009 Jon Smirl, Digispeaker
6 */ 7 */
7 8
8#include <linux/init.h>
9#include <linux/module.h> 9#include <linux/module.h>
10#include <linux/interrupt.h>
11#include <linux/device.h>
12#include <linux/delay.h>
13#include <linux/of_device.h> 10#include <linux/of_device.h>
14#include <linux/of_platform.h> 11#include <linux/of_platform.h>
15#include <linux/dma-mapping.h>
16 12
17#include <sound/core.h>
18#include <sound/pcm.h> 13#include <sound/pcm.h>
19#include <sound/pcm_params.h> 14#include <sound/pcm_params.h>
20#include <sound/initval.h>
21#include <sound/soc.h> 15#include <sound/soc.h>
22#include <sound/soc-of-simple.h>
23 16
24#include <sysdev/bestcomm/bestcomm.h>
25#include <sysdev/bestcomm/gen_bd.h>
26#include <asm/mpc52xx_psc.h> 17#include <asm/mpc52xx_psc.h>
27 18
19#include "mpc5200_psc_i2s.h"
28#include "mpc5200_dma.h" 20#include "mpc5200_dma.h"
29 21
30MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
31MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
32MODULE_LICENSE("GPL");
33
34/** 22/**
35 * PSC_I2S_RATES: sample rates supported by the I2S 23 * PSC_I2S_RATES: sample rates supported by the I2S
36 * 24 *
@@ -46,8 +34,7 @@ MODULE_LICENSE("GPL");
46 * PSC_I2S_FORMATS: audio formats supported by the PSC I2S mode 34 * PSC_I2S_FORMATS: audio formats supported by the PSC I2S mode
47 */ 35 */
48#define PSC_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \ 36#define PSC_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
49 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S24_BE | \ 37 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
50 SNDRV_PCM_FMTBIT_S32_BE)
51 38
52static int psc_i2s_hw_params(struct snd_pcm_substream *substream, 39static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
53 struct snd_pcm_hw_params *params, 40 struct snd_pcm_hw_params *params,
@@ -82,8 +69,6 @@ static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
82 } 69 }
83 out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr | mode); 70 out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr | mode);
84 71
85 snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
86
87 return 0; 72 return 0;
88} 73}
89 74
@@ -140,16 +125,13 @@ static int psc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format)
140 * psc_i2s_dai_template: template CPU Digital Audio Interface 125 * psc_i2s_dai_template: template CPU Digital Audio Interface
141 */ 126 */
142static struct snd_soc_dai_ops psc_i2s_dai_ops = { 127static struct snd_soc_dai_ops psc_i2s_dai_ops = {
143 .startup = psc_dma_startup,
144 .hw_params = psc_i2s_hw_params, 128 .hw_params = psc_i2s_hw_params,
145 .hw_free = psc_dma_hw_free,
146 .shutdown = psc_dma_shutdown,
147 .trigger = psc_dma_trigger,
148 .set_sysclk = psc_i2s_set_sysclk, 129 .set_sysclk = psc_i2s_set_sysclk,
149 .set_fmt = psc_i2s_set_fmt, 130 .set_fmt = psc_i2s_set_fmt,
150}; 131};
151 132
152static struct snd_soc_dai psc_i2s_dai_template = { 133struct snd_soc_dai psc_i2s_dai[] = {{
134 .name = "I2S",
153 .playback = { 135 .playback = {
154 .channels_min = 2, 136 .channels_min = 2,
155 .channels_max = 2, 137 .channels_max = 2,
@@ -163,71 +145,8 @@ static struct snd_soc_dai psc_i2s_dai_template = {
163 .formats = PSC_I2S_FORMATS, 145 .formats = PSC_I2S_FORMATS,
164 }, 146 },
165 .ops = &psc_i2s_dai_ops, 147 .ops = &psc_i2s_dai_ops,
166}; 148} };
167 149EXPORT_SYMBOL_GPL(psc_i2s_dai);
168/* ---------------------------------------------------------------------
169 * Sysfs attributes for debugging
170 */
171
172static ssize_t psc_i2s_status_show(struct device *dev,
173 struct device_attribute *attr, char *buf)
174{
175 struct psc_dma *psc_dma = dev_get_drvdata(dev);
176
177 return sprintf(buf, "status=%.4x sicr=%.8x rfnum=%i rfstat=0x%.4x "
178 "tfnum=%i tfstat=0x%.4x\n",
179 in_be16(&psc_dma->psc_regs->sr_csr.status),
180 in_be32(&psc_dma->psc_regs->sicr),
181 in_be16(&psc_dma->fifo_regs->rfnum) & 0x1ff,
182 in_be16(&psc_dma->fifo_regs->rfstat),
183 in_be16(&psc_dma->fifo_regs->tfnum) & 0x1ff,
184 in_be16(&psc_dma->fifo_regs->tfstat));
185}
186
187static int *psc_i2s_get_stat_attr(struct psc_dma *psc_dma, const char *name)
188{
189 if (strcmp(name, "playback_underrun") == 0)
190 return &psc_dma->stats.underrun_count;
191 if (strcmp(name, "capture_overrun") == 0)
192 return &psc_dma->stats.overrun_count;
193
194 return NULL;
195}
196
197static ssize_t psc_i2s_stat_show(struct device *dev,
198 struct device_attribute *attr, char *buf)
199{
200 struct psc_dma *psc_dma = dev_get_drvdata(dev);
201 int *attrib;
202
203 attrib = psc_i2s_get_stat_attr(psc_dma, attr->attr.name);
204 if (!attrib)
205 return 0;
206
207 return sprintf(buf, "%i\n", *attrib);
208}
209
210static ssize_t psc_i2s_stat_store(struct device *dev,
211 struct device_attribute *attr,
212 const char *buf,
213 size_t count)
214{
215 struct psc_dma *psc_dma = dev_get_drvdata(dev);
216 int *attrib;
217
218 attrib = psc_i2s_get_stat_attr(psc_dma, attr->attr.name);
219 if (!attrib)
220 return 0;
221
222 *attrib = simple_strtoul(buf, NULL, 0);
223 return count;
224}
225
226static DEVICE_ATTR(status, 0644, psc_i2s_status_show, NULL);
227static DEVICE_ATTR(playback_underrun, 0644, psc_i2s_stat_show,
228 psc_i2s_stat_store);
229static DEVICE_ATTR(capture_overrun, 0644, psc_i2s_stat_show,
230 psc_i2s_stat_store);
231 150
232/* --------------------------------------------------------------------- 151/* ---------------------------------------------------------------------
233 * OF platform bus binding code: 152 * OF platform bus binding code:
@@ -237,82 +156,26 @@ static DEVICE_ATTR(capture_overrun, 0644, psc_i2s_stat_show,
237static int __devinit psc_i2s_of_probe(struct of_device *op, 156static int __devinit psc_i2s_of_probe(struct of_device *op,
238 const struct of_device_id *match) 157 const struct of_device_id *match)
239{ 158{
240 phys_addr_t fifo; 159 int rc;
241 struct psc_dma *psc_dma; 160 struct psc_dma *psc_dma;
242 struct resource res; 161 struct mpc52xx_psc __iomem *regs;
243 int size, psc_id, irq, rc;
244 const __be32 *prop;
245 void __iomem *regs;
246
247 dev_dbg(&op->dev, "probing psc i2s device\n");
248
249 /* Get the PSC ID */
250 prop = of_get_property(op->node, "cell-index", &size);
251 if (!prop || size < sizeof *prop)
252 return -ENODEV;
253 psc_id = be32_to_cpu(*prop);
254
255 /* Fetch the registers and IRQ of the PSC */
256 irq = irq_of_parse_and_map(op->node, 0);
257 if (of_address_to_resource(op->node, 0, &res)) {
258 dev_err(&op->dev, "Missing reg property\n");
259 return -ENODEV;
260 }
261 regs = ioremap(res.start, 1 + res.end - res.start);
262 if (!regs) {
263 dev_err(&op->dev, "Could not map registers\n");
264 return -ENODEV;
265 }
266 162
267 /* Allocate and initialize the driver private data */ 163 rc = mpc5200_audio_dma_create(op);
268 psc_dma = kzalloc(sizeof *psc_dma, GFP_KERNEL); 164 if (rc != 0)
269 if (!psc_dma) { 165 return rc;
270 iounmap(regs); 166
271 return -ENOMEM; 167 rc = snd_soc_register_dais(psc_i2s_dai, ARRAY_SIZE(psc_i2s_dai));
272 } 168 if (rc != 0) {
273 spin_lock_init(&psc_dma->lock); 169 pr_err("Failed to register DAI\n");
274 psc_dma->irq = irq; 170 return 0;
275 psc_dma->psc_regs = regs;
276 psc_dma->fifo_regs = regs + sizeof *psc_dma->psc_regs;
277 psc_dma->dev = &op->dev;
278 psc_dma->playback.psc_dma = psc_dma;
279 psc_dma->capture.psc_dma = psc_dma;
280 snprintf(psc_dma->name, sizeof psc_dma->name, "PSC%u", psc_id+1);
281
282 /* Fill out the CPU DAI structure */
283 memcpy(&psc_dma->dai, &psc_i2s_dai_template, sizeof psc_dma->dai);
284 psc_dma->dai.private_data = psc_dma;
285 psc_dma->dai.name = psc_dma->name;
286 psc_dma->dai.id = psc_id;
287
288 /* Find the address of the fifo data registers and setup the
289 * DMA tasks */
290 fifo = res.start + offsetof(struct mpc52xx_psc, buffer.buffer_32);
291 psc_dma->capture.bcom_task =
292 bcom_psc_gen_bd_rx_init(psc_id, 10, fifo, 512);
293 psc_dma->playback.bcom_task =
294 bcom_psc_gen_bd_tx_init(psc_id, 10, fifo);
295 if (!psc_dma->capture.bcom_task ||
296 !psc_dma->playback.bcom_task) {
297 dev_err(&op->dev, "Could not allocate bestcomm tasks\n");
298 iounmap(regs);
299 kfree(psc_dma);
300 return -ENODEV;
301 } 171 }
302 172
303 /* Disable all interrupts and reset the PSC */ 173 psc_dma = dev_get_drvdata(&op->dev);
304 out_be16(&psc_dma->psc_regs->isr_imr.imr, 0); 174 regs = psc_dma->psc_regs;
305 out_8(&psc_dma->psc_regs->command, 3 << 4); /* reset transmitter */
306 out_8(&psc_dma->psc_regs->command, 2 << 4); /* reset receiver */
307 out_8(&psc_dma->psc_regs->command, 1 << 4); /* reset mode */
308 out_8(&psc_dma->psc_regs->command, 4 << 4); /* reset error */
309 175
310 /* Configure the serial interface mode; defaulting to CODEC8 mode */ 176 /* Configure the serial interface mode; defaulting to CODEC8 mode */
311 psc_dma->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S | 177 psc_dma->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S |
312 MPC52xx_PSC_SICR_CLKPOL; 178 MPC52xx_PSC_SICR_CLKPOL;
313 if (of_get_property(op->node, "fsl,cellslave", NULL))
314 psc_dma->sicr |= MPC52xx_PSC_SICR_CELLSLAVE |
315 MPC52xx_PSC_SICR_GENCLK;
316 out_be32(&psc_dma->psc_regs->sicr, 179 out_be32(&psc_dma->psc_regs->sicr,
317 psc_dma->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8); 180 psc_dma->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8);
318 181
@@ -321,66 +184,37 @@ static int __devinit psc_i2s_of_probe(struct of_device *op,
321 if (!of_get_property(op->node, "codec-handle", NULL)) 184 if (!of_get_property(op->node, "codec-handle", NULL))
322 return 0; 185 return 0;
323 186
324 /* Set up mode register; 187 /* Due to errata in the dma mode; need to line up enabling
325 * First write: RxRdy (FIFO Alarm) generates rx FIFO irq 188 * the transmitter with a transition on the frame sync
326 * Second write: register Normal mode for non loopback 189 * line */
327 */ 190
328 out_8(&psc_dma->psc_regs->mode, 0); 191 /* first make sure it is low */
329 out_8(&psc_dma->psc_regs->mode, 0); 192 while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) != 0)
330 193 ;
331 /* Set the TX and RX fifo alarm thresholds */ 194 /* then wait for the transition to high */
332 out_be16(&psc_dma->fifo_regs->rfalarm, 0x100); 195 while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) == 0)
333 out_8(&psc_dma->fifo_regs->rfcntl, 0x4); 196 ;
334 out_be16(&psc_dma->fifo_regs->tfalarm, 0x100); 197 /* Finally, enable the PSC.
335 out_8(&psc_dma->fifo_regs->tfcntl, 0x7); 198 * Receiver must always be enabled; even when we only want
336 199 * transmit. (see 15.3.2.3 of MPC5200B User's Guide) */
337 /* Lookup the IRQ numbers */ 200
338 psc_dma->playback.irq = 201 /* Go */
339 bcom_get_task_irq(psc_dma->playback.bcom_task); 202 out_8(&psc_dma->psc_regs->command,
340 psc_dma->capture.irq = 203 MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
341 bcom_get_task_irq(psc_dma->capture.bcom_task);
342
343 /* Save what we've done so it can be found again later */
344 dev_set_drvdata(&op->dev, psc_dma);
345
346 /* Register the SYSFS files */
347 rc = device_create_file(psc_dma->dev, &dev_attr_status);
348 rc |= device_create_file(psc_dma->dev, &dev_attr_capture_overrun);
349 rc |= device_create_file(psc_dma->dev, &dev_attr_playback_underrun);
350 if (rc)
351 dev_info(psc_dma->dev, "error creating sysfs files\n");
352
353 snd_soc_register_platform(&psc_dma_pcm_soc_platform);
354
355 /* Tell the ASoC OF helpers about it */
356 of_snd_soc_register_platform(&psc_dma_pcm_soc_platform, op->node,
357 &psc_dma->dai);
358 204
359 return 0; 205 return 0;
206
360} 207}
361 208
362static int __devexit psc_i2s_of_remove(struct of_device *op) 209static int __devexit psc_i2s_of_remove(struct of_device *op)
363{ 210{
364 struct psc_dma *psc_dma = dev_get_drvdata(&op->dev); 211 return mpc5200_audio_dma_destroy(op);
365
366 dev_dbg(&op->dev, "psc_i2s_remove()\n");
367
368 snd_soc_unregister_platform(&psc_dma_pcm_soc_platform);
369
370 bcom_gen_bd_rx_release(psc_dma->capture.bcom_task);
371 bcom_gen_bd_tx_release(psc_dma->playback.bcom_task);
372
373 iounmap(psc_dma->psc_regs);
374 iounmap(psc_dma->fifo_regs);
375 kfree(psc_dma);
376 dev_set_drvdata(&op->dev, NULL);
377
378 return 0;
379} 212}
380 213
381/* Match table for of_platform binding */ 214/* Match table for of_platform binding */
382static struct of_device_id psc_i2s_match[] __devinitdata = { 215static struct of_device_id psc_i2s_match[] __devinitdata = {
383 { .compatible = "fsl,mpc5200-psc-i2s", }, 216 { .compatible = "fsl,mpc5200-psc-i2s", },
217 { .compatible = "fsl,mpc5200b-psc-i2s", },
384 {} 218 {}
385}; 219};
386MODULE_DEVICE_TABLE(of, psc_i2s_match); 220MODULE_DEVICE_TABLE(of, psc_i2s_match);
@@ -411,4 +245,7 @@ static void __exit psc_i2s_exit(void)
411} 245}
412module_exit(psc_i2s_exit); 246module_exit(psc_i2s_exit);
413 247
248MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
249MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
250MODULE_LICENSE("GPL");
414 251
diff --git a/sound/soc/fsl/mpc5200_psc_i2s.h b/sound/soc/fsl/mpc5200_psc_i2s.h
new file mode 100644
index 000000000000..ce55e070fdf3
--- /dev/null
+++ b/sound/soc/fsl/mpc5200_psc_i2s.h
@@ -0,0 +1,12 @@
1/*
2 * Freescale MPC5200 PSC in I2S mode
3 * ALSA SoC Digital Audio Interface (DAI) driver
4 *
5 */
6
7#ifndef __SOUND_SOC_FSL_MPC52xx_PSC_I2S_H__
8#define __SOUND_SOC_FSL_MPC52xx_PSC_I2S_H__
9
10extern struct snd_soc_dai psc_i2s_dai[];
11
12#endif /* __SOUND_SOC_FSL_MPC52xx_PSC_I2S_H__ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-11 10:02:09 -0500