]>
Commit | Line | Data |
---|---|---|
310355c1 VB |
1 | /* |
2 | * ALSA PCM interface for the TI DAVINCI processor | |
3 | * | |
d6b52039 | 4 | * Author: Vladimir Barinov, <vbarinov@embeddedalley.com> |
310355c1 | 5 | * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com> |
1e224f32 | 6 | * added SRAM ping/pong (C) 2008 Troy Kisky <troy.kisky@boundarydevices.com> |
310355c1 VB |
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 version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/dma-mapping.h> | |
9cd28ab0 | 18 | #include <linux/kernel.h> |
310355c1 VB |
19 | |
20 | #include <sound/core.h> | |
21 | #include <sound/pcm.h> | |
22 | #include <sound/pcm_params.h> | |
23 | #include <sound/soc.h> | |
24 | ||
25 | #include <asm/dma.h> | |
82075af6 | 26 | #include <mach/edma.h> |
1e224f32 | 27 | #include <mach/sram.h> |
310355c1 VB |
28 | |
29 | #include "davinci-pcm.h" | |
30 | ||
1e224f32 TK |
31 | #ifdef DEBUG |
32 | static void print_buf_info(int slot, char *name) | |
33 | { | |
34 | struct edmacc_param p; | |
35 | if (slot < 0) | |
36 | return; | |
37 | edma_read_slot(slot, &p); | |
38 | printk(KERN_DEBUG "%s: 0x%x, opt=%x, src=%x, a_b_cnt=%x dst=%x\n", | |
39 | name, slot, p.opt, p.src, p.a_b_cnt, p.dst); | |
40 | printk(KERN_DEBUG " src_dst_bidx=%x link_bcntrld=%x src_dst_cidx=%x ccnt=%x\n", | |
41 | p.src_dst_bidx, p.link_bcntrld, p.src_dst_cidx, p.ccnt); | |
42 | } | |
43 | #else | |
44 | static void print_buf_info(int slot, char *name) | |
45 | { | |
46 | } | |
47 | #endif | |
48 | ||
49 | static struct snd_pcm_hardware pcm_hardware_playback = { | |
310355c1 VB |
50 | .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
51 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | | |
52 | SNDRV_PCM_INFO_PAUSE), | |
53 | .formats = (SNDRV_PCM_FMTBIT_S16_LE), | |
54 | .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | | |
55 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | | |
56 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | | |
57 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | | |
58 | SNDRV_PCM_RATE_KNOT), | |
59 | .rate_min = 8000, | |
60 | .rate_max = 96000, | |
61 | .channels_min = 2, | |
62 | .channels_max = 2, | |
63 | .buffer_bytes_max = 128 * 1024, | |
64 | .period_bytes_min = 32, | |
65 | .period_bytes_max = 8 * 1024, | |
66 | .periods_min = 16, | |
67 | .periods_max = 255, | |
68 | .fifo_size = 0, | |
69 | }; | |
70 | ||
1e224f32 TK |
71 | static struct snd_pcm_hardware pcm_hardware_capture = { |
72 | .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
73 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | | |
74 | SNDRV_PCM_INFO_PAUSE), | |
75 | .formats = (SNDRV_PCM_FMTBIT_S16_LE), | |
76 | .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | | |
77 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | | |
78 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | | |
79 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | | |
80 | SNDRV_PCM_RATE_KNOT), | |
81 | .rate_min = 8000, | |
82 | .rate_max = 96000, | |
83 | .channels_min = 2, | |
84 | .channels_max = 2, | |
85 | .buffer_bytes_max = 128 * 1024, | |
86 | .period_bytes_min = 32, | |
87 | .period_bytes_max = 8 * 1024, | |
88 | .periods_min = 16, | |
89 | .periods_max = 255, | |
90 | .fifo_size = 0, | |
91 | }; | |
92 | ||
93 | /* | |
94 | * How ping/pong works.... | |
95 | * | |
96 | * Playback: | |
97 | * ram_params - copys 2*ping_size from start of SDRAM to iram, | |
98 | * links to ram_link2 | |
99 | * ram_link2 - copys rest of SDRAM to iram in ping_size units, | |
100 | * links to ram_link | |
101 | * ram_link - copys entire SDRAM to iram in ping_size uints, | |
102 | * links to self | |
103 | * | |
104 | * asp_params - same as asp_link[0] | |
105 | * asp_link[0] - copys from lower half of iram to asp port | |
106 | * links to asp_link[1], triggers iram copy event on completion | |
107 | * asp_link[1] - copys from upper half of iram to asp port | |
108 | * links to asp_link[0], triggers iram copy event on completion | |
109 | * triggers interrupt only needed to let upper SOC levels update position | |
110 | * in stream on completion | |
111 | * | |
112 | * When playback is started: | |
113 | * ram_params started | |
114 | * asp_params started | |
115 | * | |
116 | * Capture: | |
117 | * ram_params - same as ram_link, | |
118 | * links to ram_link | |
119 | * ram_link - same as playback | |
120 | * links to self | |
121 | * | |
122 | * asp_params - same as playback | |
123 | * asp_link[0] - same as playback | |
124 | * asp_link[1] - same as playback | |
125 | * | |
126 | * When capture is started: | |
127 | * asp_params started | |
128 | */ | |
310355c1 VB |
129 | struct davinci_runtime_data { |
130 | spinlock_t lock; | |
131 | int period; /* current DMA period */ | |
1587ea31 TK |
132 | int asp_channel; /* Master DMA channel */ |
133 | int asp_link[2]; /* asp parameter link channel, ping/pong */ | |
310355c1 | 134 | struct davinci_pcm_dma_params *params; /* DMA params */ |
1e224f32 TK |
135 | int ram_channel; |
136 | int ram_link; | |
137 | int ram_link2; | |
138 | struct edmacc_param asp_params; | |
139 | struct edmacc_param ram_params; | |
310355c1 VB |
140 | }; |
141 | ||
1e224f32 TK |
142 | /* |
143 | * Not used with ping/pong | |
144 | */ | |
310355c1 VB |
145 | static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream) |
146 | { | |
147 | struct davinci_runtime_data *prtd = substream->runtime->private_data; | |
148 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1587ea31 | 149 | int link = prtd->asp_link[0]; |
310355c1 VB |
150 | unsigned int period_size; |
151 | unsigned int dma_offset; | |
152 | dma_addr_t dma_pos; | |
153 | dma_addr_t src, dst; | |
154 | unsigned short src_bidx, dst_bidx; | |
4fa9c1a5 | 155 | unsigned short src_cidx, dst_cidx; |
310355c1 | 156 | unsigned int data_type; |
6a99fb5f | 157 | unsigned short acnt; |
310355c1 | 158 | unsigned int count; |
4fa9c1a5 | 159 | unsigned int fifo_level; |
310355c1 VB |
160 | |
161 | period_size = snd_pcm_lib_period_bytes(substream); | |
162 | dma_offset = prtd->period * period_size; | |
163 | dma_pos = runtime->dma_addr + dma_offset; | |
4fa9c1a5 | 164 | fifo_level = prtd->params->fifo_level; |
310355c1 | 165 | |
9cd28ab0 | 166 | pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d " |
1587ea31 | 167 | "dma_ptr = %x period_size=%x\n", link, dma_pos, period_size); |
310355c1 VB |
168 | |
169 | data_type = prtd->params->data_type; | |
170 | count = period_size / data_type; | |
4fa9c1a5 C |
171 | if (fifo_level) |
172 | count /= fifo_level; | |
310355c1 VB |
173 | |
174 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
175 | src = dma_pos; | |
176 | dst = prtd->params->dma_addr; | |
177 | src_bidx = data_type; | |
178 | dst_bidx = 0; | |
4fa9c1a5 C |
179 | src_cidx = data_type * fifo_level; |
180 | dst_cidx = 0; | |
310355c1 VB |
181 | } else { |
182 | src = prtd->params->dma_addr; | |
183 | dst = dma_pos; | |
184 | src_bidx = 0; | |
185 | dst_bidx = data_type; | |
4fa9c1a5 C |
186 | src_cidx = 0; |
187 | dst_cidx = data_type * fifo_level; | |
310355c1 VB |
188 | } |
189 | ||
6a99fb5f | 190 | acnt = prtd->params->acnt; |
1587ea31 TK |
191 | edma_set_src(link, src, INCR, W8BIT); |
192 | edma_set_dest(link, dst, INCR, W8BIT); | |
4fa9c1a5 | 193 | |
1587ea31 TK |
194 | edma_set_src_index(link, src_bidx, src_cidx); |
195 | edma_set_dest_index(link, dst_bidx, dst_cidx); | |
4fa9c1a5 C |
196 | |
197 | if (!fifo_level) | |
1587ea31 | 198 | edma_set_transfer_params(link, acnt, count, 1, 0, ASYNC); |
4fa9c1a5 | 199 | else |
1587ea31 | 200 | edma_set_transfer_params(link, acnt, fifo_level, count, |
4fa9c1a5 | 201 | fifo_level, ABSYNC); |
310355c1 VB |
202 | |
203 | prtd->period++; | |
204 | if (unlikely(prtd->period >= runtime->periods)) | |
205 | prtd->period = 0; | |
206 | } | |
207 | ||
1587ea31 | 208 | static void davinci_pcm_dma_irq(unsigned link, u16 ch_status, void *data) |
310355c1 VB |
209 | { |
210 | struct snd_pcm_substream *substream = data; | |
211 | struct davinci_runtime_data *prtd = substream->runtime->private_data; | |
212 | ||
1e224f32 | 213 | print_buf_info(prtd->ram_channel, "i ram_channel"); |
1587ea31 | 214 | pr_debug("davinci_pcm: link=%d, status=0x%x\n", link, ch_status); |
310355c1 VB |
215 | |
216 | if (unlikely(ch_status != DMA_COMPLETE)) | |
217 | return; | |
218 | ||
219 | if (snd_pcm_running(substream)) { | |
1e224f32 TK |
220 | if (prtd->ram_channel < 0) { |
221 | /* No ping/pong must fix up link dma data*/ | |
222 | spin_lock(&prtd->lock); | |
223 | davinci_pcm_enqueue_dma(substream); | |
224 | spin_unlock(&prtd->lock); | |
225 | } | |
310355c1 | 226 | snd_pcm_period_elapsed(substream); |
1e224f32 TK |
227 | } |
228 | } | |
229 | ||
230 | static int allocate_sram(struct snd_pcm_substream *substream, unsigned size, | |
231 | struct snd_pcm_hardware *ppcm) | |
232 | { | |
233 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
234 | struct snd_dma_buffer *iram_dma = NULL; | |
235 | dma_addr_t iram_phys = 0; | |
236 | void *iram_virt = NULL; | |
237 | ||
238 | if (buf->private_data || !size) | |
239 | return 0; | |
240 | ||
241 | ppcm->period_bytes_max = size; | |
242 | iram_virt = sram_alloc(size, &iram_phys); | |
243 | if (!iram_virt) | |
244 | goto exit1; | |
245 | iram_dma = kzalloc(sizeof(*iram_dma), GFP_KERNEL); | |
246 | if (!iram_dma) | |
247 | goto exit2; | |
248 | iram_dma->area = iram_virt; | |
249 | iram_dma->addr = iram_phys; | |
250 | memset(iram_dma->area, 0, size); | |
251 | iram_dma->bytes = size; | |
252 | buf->private_data = iram_dma; | |
253 | return 0; | |
254 | exit2: | |
255 | if (iram_virt) | |
256 | sram_free(iram_virt, size); | |
257 | exit1: | |
258 | return -ENOMEM; | |
259 | } | |
310355c1 | 260 | |
1e224f32 TK |
261 | /* |
262 | * Only used with ping/pong. | |
263 | * This is called after runtime->dma_addr, period_bytes and data_type are valid | |
264 | */ | |
265 | static int ping_pong_dma_setup(struct snd_pcm_substream *substream) | |
266 | { | |
267 | unsigned short ram_src_cidx, ram_dst_cidx; | |
268 | struct snd_pcm_runtime *runtime = substream->runtime; | |
269 | struct davinci_runtime_data *prtd = runtime->private_data; | |
270 | struct snd_dma_buffer *iram_dma = | |
271 | (struct snd_dma_buffer *)substream->dma_buffer.private_data; | |
272 | struct davinci_pcm_dma_params *params = prtd->params; | |
273 | unsigned int data_type = params->data_type; | |
274 | unsigned int acnt = params->acnt; | |
275 | /* divide by 2 for ping/pong */ | |
276 | unsigned int ping_size = snd_pcm_lib_period_bytes(substream) >> 1; | |
277 | int link = prtd->asp_link[1]; | |
278 | unsigned int fifo_level = prtd->params->fifo_level; | |
279 | unsigned int count; | |
280 | if ((data_type == 0) || (data_type > 4)) { | |
281 | printk(KERN_ERR "%s: data_type=%i\n", __func__, data_type); | |
282 | return -EINVAL; | |
283 | } | |
284 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
285 | dma_addr_t asp_src_pong = iram_dma->addr + ping_size; | |
286 | ram_src_cidx = ping_size; | |
287 | ram_dst_cidx = -ping_size; | |
288 | edma_set_src(link, asp_src_pong, INCR, W8BIT); | |
289 | ||
290 | link = prtd->asp_link[0]; | |
291 | edma_set_src_index(link, data_type, data_type * fifo_level); | |
292 | link = prtd->asp_link[1]; | |
293 | edma_set_src_index(link, data_type, data_type * fifo_level); | |
294 | ||
295 | link = prtd->ram_link; | |
296 | edma_set_src(link, runtime->dma_addr, INCR, W32BIT); | |
297 | } else { | |
298 | dma_addr_t asp_dst_pong = iram_dma->addr + ping_size; | |
299 | ram_src_cidx = -ping_size; | |
300 | ram_dst_cidx = ping_size; | |
301 | edma_set_dest(link, asp_dst_pong, INCR, W8BIT); | |
302 | ||
303 | link = prtd->asp_link[0]; | |
304 | edma_set_dest_index(link, data_type, data_type * fifo_level); | |
305 | link = prtd->asp_link[1]; | |
306 | edma_set_dest_index(link, data_type, data_type * fifo_level); | |
307 | ||
308 | link = prtd->ram_link; | |
309 | edma_set_dest(link, runtime->dma_addr, INCR, W32BIT); | |
310 | } | |
311 | ||
312 | if (!fifo_level) { | |
313 | count = ping_size / data_type; | |
314 | edma_set_transfer_params(prtd->asp_link[0], acnt, count, | |
315 | 1, 0, ASYNC); | |
316 | edma_set_transfer_params(prtd->asp_link[1], acnt, count, | |
317 | 1, 0, ASYNC); | |
318 | } else { | |
319 | count = ping_size / (data_type * fifo_level); | |
320 | edma_set_transfer_params(prtd->asp_link[0], acnt, fifo_level, | |
321 | count, fifo_level, ABSYNC); | |
322 | edma_set_transfer_params(prtd->asp_link[1], acnt, fifo_level, | |
323 | count, fifo_level, ABSYNC); | |
324 | } | |
325 | ||
326 | link = prtd->ram_link; | |
327 | edma_set_src_index(link, ping_size, ram_src_cidx); | |
328 | edma_set_dest_index(link, ping_size, ram_dst_cidx); | |
329 | edma_set_transfer_params(link, ping_size, 2, | |
330 | runtime->periods, 2, ASYNC); | |
331 | ||
332 | /* init master params */ | |
333 | edma_read_slot(prtd->asp_link[0], &prtd->asp_params); | |
334 | edma_read_slot(prtd->ram_link, &prtd->ram_params); | |
335 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
336 | struct edmacc_param p_ram; | |
337 | /* Copy entire iram buffer before playback started */ | |
338 | prtd->ram_params.a_b_cnt = (1 << 16) | (ping_size << 1); | |
339 | /* 0 dst_bidx */ | |
340 | prtd->ram_params.src_dst_bidx = (ping_size << 1); | |
341 | /* 0 dst_cidx */ | |
342 | prtd->ram_params.src_dst_cidx = (ping_size << 1); | |
343 | prtd->ram_params.ccnt = 1; | |
344 | ||
345 | /* Skip 1st period */ | |
346 | edma_read_slot(prtd->ram_link, &p_ram); | |
347 | p_ram.src += (ping_size << 1); | |
348 | p_ram.ccnt -= 1; | |
349 | edma_write_slot(prtd->ram_link2, &p_ram); | |
350 | /* | |
351 | * When 1st started, ram -> iram dma channel will fill the | |
352 | * entire iram. Then, whenever a ping/pong asp buffer finishes, | |
353 | * 1/2 iram will be filled. | |
354 | */ | |
355 | prtd->ram_params.link_bcntrld = | |
356 | EDMA_CHAN_SLOT(prtd->ram_link2) << 5; | |
357 | } | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /* 1 asp tx or rx channel using 2 parameter channels | |
362 | * 1 ram to/from iram channel using 1 parameter channel | |
363 | * | |
364 | * Playback | |
365 | * ram copy channel kicks off first, | |
366 | * 1st ram copy of entire iram buffer completion kicks off asp channel | |
367 | * asp tcc always kicks off ram copy of 1/2 iram buffer | |
368 | * | |
369 | * Record | |
370 | * asp channel starts, tcc kicks off ram copy | |
371 | */ | |
372 | static int request_ping_pong(struct snd_pcm_substream *substream, | |
373 | struct davinci_runtime_data *prtd, | |
374 | struct snd_dma_buffer *iram_dma) | |
375 | { | |
376 | dma_addr_t asp_src_ping; | |
377 | dma_addr_t asp_dst_ping; | |
378 | int link; | |
379 | struct davinci_pcm_dma_params *params = prtd->params; | |
380 | ||
381 | /* Request ram master channel */ | |
382 | link = prtd->ram_channel = edma_alloc_channel(EDMA_CHANNEL_ANY, | |
383 | davinci_pcm_dma_irq, substream, | |
384 | EVENTQ_1); | |
385 | if (link < 0) | |
386 | goto exit1; | |
387 | ||
388 | /* Request ram link channel */ | |
389 | link = prtd->ram_link = edma_alloc_slot( | |
390 | EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY); | |
391 | if (link < 0) | |
392 | goto exit2; | |
393 | ||
394 | link = prtd->asp_link[1] = edma_alloc_slot( | |
395 | EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY); | |
396 | if (link < 0) | |
397 | goto exit3; | |
398 | ||
399 | prtd->ram_link2 = -1; | |
400 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
401 | link = prtd->ram_link2 = edma_alloc_slot( | |
402 | EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY); | |
403 | if (link < 0) | |
404 | goto exit4; | |
405 | } | |
406 | /* circle ping-pong buffers */ | |
407 | edma_link(prtd->asp_link[0], prtd->asp_link[1]); | |
408 | edma_link(prtd->asp_link[1], prtd->asp_link[0]); | |
409 | /* circle ram buffers */ | |
410 | edma_link(prtd->ram_link, prtd->ram_link); | |
411 | ||
412 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
413 | asp_src_ping = iram_dma->addr; | |
414 | asp_dst_ping = params->dma_addr; /* fifo */ | |
415 | } else { | |
416 | asp_src_ping = params->dma_addr; /* fifo */ | |
417 | asp_dst_ping = iram_dma->addr; | |
310355c1 | 418 | } |
1e224f32 TK |
419 | /* ping */ |
420 | link = prtd->asp_link[0]; | |
421 | edma_set_src(link, asp_src_ping, INCR, W16BIT); | |
422 | edma_set_dest(link, asp_dst_ping, INCR, W16BIT); | |
423 | edma_set_src_index(link, 0, 0); | |
424 | edma_set_dest_index(link, 0, 0); | |
425 | ||
426 | edma_read_slot(link, &prtd->asp_params); | |
427 | prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f) | TCINTEN); | |
428 | prtd->asp_params.opt |= TCCHEN | EDMA_TCC(prtd->ram_channel & 0x3f); | |
429 | edma_write_slot(link, &prtd->asp_params); | |
430 | ||
431 | /* pong */ | |
432 | link = prtd->asp_link[1]; | |
433 | edma_set_src(link, asp_src_ping, INCR, W16BIT); | |
434 | edma_set_dest(link, asp_dst_ping, INCR, W16BIT); | |
435 | edma_set_src_index(link, 0, 0); | |
436 | edma_set_dest_index(link, 0, 0); | |
437 | ||
438 | edma_read_slot(link, &prtd->asp_params); | |
439 | prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f)); | |
440 | /* interrupt after every pong completion */ | |
441 | prtd->asp_params.opt |= TCINTEN | TCCHEN | | |
442 | EDMA_TCC(EDMA_CHAN_SLOT(prtd->ram_channel)); | |
443 | edma_write_slot(link, &prtd->asp_params); | |
444 | ||
445 | /* ram */ | |
446 | link = prtd->ram_link; | |
447 | edma_set_src(link, iram_dma->addr, INCR, W32BIT); | |
448 | edma_set_dest(link, iram_dma->addr, INCR, W32BIT); | |
449 | pr_debug("%s: audio dma channels/slots in use for ram:%u %u %u," | |
450 | "for asp:%u %u %u\n", __func__, | |
451 | prtd->ram_channel, prtd->ram_link, prtd->ram_link2, | |
452 | prtd->asp_channel, prtd->asp_link[0], | |
453 | prtd->asp_link[1]); | |
454 | return 0; | |
455 | exit4: | |
456 | edma_free_channel(prtd->asp_link[1]); | |
457 | prtd->asp_link[1] = -1; | |
458 | exit3: | |
459 | edma_free_channel(prtd->ram_link); | |
460 | prtd->ram_link = -1; | |
461 | exit2: | |
462 | edma_free_channel(prtd->ram_channel); | |
463 | prtd->ram_channel = -1; | |
464 | exit1: | |
465 | return link; | |
310355c1 VB |
466 | } |
467 | ||
468 | static int davinci_pcm_dma_request(struct snd_pcm_substream *substream) | |
469 | { | |
1e224f32 | 470 | struct snd_dma_buffer *iram_dma; |
310355c1 | 471 | struct davinci_runtime_data *prtd = substream->runtime->private_data; |
1e224f32 TK |
472 | struct davinci_pcm_dma_params *params = prtd->params; |
473 | int link; | |
310355c1 | 474 | |
1e224f32 TK |
475 | if (!params) |
476 | return -ENODEV; | |
310355c1 | 477 | |
1e224f32 TK |
478 | /* Request asp master DMA channel */ |
479 | link = prtd->asp_channel = edma_alloc_channel(params->channel, | |
480 | davinci_pcm_dma_irq, substream, EVENTQ_0); | |
481 | if (link < 0) | |
482 | goto exit1; | |
483 | ||
484 | /* Request asp link channels */ | |
485 | link = prtd->asp_link[0] = edma_alloc_slot( | |
486 | EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY); | |
487 | if (link < 0) | |
488 | goto exit2; | |
489 | ||
490 | iram_dma = (struct snd_dma_buffer *)substream->dma_buffer.private_data; | |
491 | if (iram_dma) { | |
492 | if (request_ping_pong(substream, prtd, iram_dma) == 0) | |
493 | return 0; | |
494 | printk(KERN_WARNING "%s: dma channel allocation failed," | |
495 | "not using sram\n", __func__); | |
310355c1 | 496 | } |
82075af6 DB |
497 | |
498 | /* Issue transfer completion IRQ when the channel completes a | |
499 | * transfer, then always reload from the same slot (by a kind | |
500 | * of loopback link). The completion IRQ handler will update | |
501 | * the reload slot with a new buffer. | |
502 | * | |
503 | * REVISIT save p_ram here after setting up everything except | |
504 | * the buffer and its length (ccnt) ... use it as a template | |
505 | * so davinci_pcm_enqueue_dma() takes less time in IRQ. | |
506 | */ | |
1e224f32 TK |
507 | edma_read_slot(link, &prtd->asp_params); |
508 | prtd->asp_params.opt |= TCINTEN | | |
509 | EDMA_TCC(EDMA_CHAN_SLOT(prtd->asp_channel)); | |
510 | prtd->asp_params.link_bcntrld = EDMA_CHAN_SLOT(link) << 5; | |
511 | edma_write_slot(link, &prtd->asp_params); | |
310355c1 | 512 | return 0; |
1e224f32 TK |
513 | exit2: |
514 | edma_free_channel(prtd->asp_channel); | |
515 | prtd->asp_channel = -1; | |
516 | exit1: | |
517 | return link; | |
310355c1 VB |
518 | } |
519 | ||
520 | static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | |
521 | { | |
522 | struct davinci_runtime_data *prtd = substream->runtime->private_data; | |
523 | int ret = 0; | |
524 | ||
525 | spin_lock(&prtd->lock); | |
526 | ||
527 | switch (cmd) { | |
528 | case SNDRV_PCM_TRIGGER_START: | |
529 | case SNDRV_PCM_TRIGGER_RESUME: | |
530 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
1587ea31 | 531 | edma_start(prtd->asp_channel); |
310355c1 VB |
532 | break; |
533 | case SNDRV_PCM_TRIGGER_STOP: | |
534 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
535 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
1587ea31 | 536 | edma_stop(prtd->asp_channel); |
310355c1 VB |
537 | break; |
538 | default: | |
539 | ret = -EINVAL; | |
540 | break; | |
541 | } | |
542 | ||
543 | spin_unlock(&prtd->lock); | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
548 | static int davinci_pcm_prepare(struct snd_pcm_substream *substream) | |
549 | { | |
550 | struct davinci_runtime_data *prtd = substream->runtime->private_data; | |
310355c1 | 551 | |
1e224f32 TK |
552 | if (prtd->ram_channel >= 0) { |
553 | int ret = ping_pong_dma_setup(substream); | |
554 | if (ret < 0) | |
555 | return ret; | |
556 | ||
557 | edma_write_slot(prtd->ram_channel, &prtd->ram_params); | |
558 | edma_write_slot(prtd->asp_channel, &prtd->asp_params); | |
559 | ||
560 | print_buf_info(prtd->ram_channel, "ram_channel"); | |
561 | print_buf_info(prtd->ram_link, "ram_link"); | |
562 | print_buf_info(prtd->ram_link2, "ram_link2"); | |
563 | print_buf_info(prtd->asp_channel, "asp_channel"); | |
564 | print_buf_info(prtd->asp_link[0], "asp_link[0]"); | |
565 | print_buf_info(prtd->asp_link[1], "asp_link[1]"); | |
566 | ||
567 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
568 | /* copy 1st iram buffer */ | |
569 | edma_start(prtd->ram_channel); | |
570 | } | |
571 | return 0; | |
572 | } | |
310355c1 VB |
573 | prtd->period = 0; |
574 | davinci_pcm_enqueue_dma(substream); | |
575 | ||
82075af6 | 576 | /* Copy self-linked parameter RAM entry into master channel */ |
1e224f32 TK |
577 | edma_read_slot(prtd->asp_link[0], &prtd->asp_params); |
578 | edma_write_slot(prtd->asp_channel, &prtd->asp_params); | |
6e541475 | 579 | davinci_pcm_enqueue_dma(substream); |
310355c1 VB |
580 | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static snd_pcm_uframes_t | |
585 | davinci_pcm_pointer(struct snd_pcm_substream *substream) | |
586 | { | |
587 | struct snd_pcm_runtime *runtime = substream->runtime; | |
588 | struct davinci_runtime_data *prtd = runtime->private_data; | |
589 | unsigned int offset; | |
1587ea31 TK |
590 | int asp_count; |
591 | dma_addr_t asp_src, asp_dst; | |
310355c1 VB |
592 | |
593 | spin_lock(&prtd->lock); | |
1e224f32 TK |
594 | if (prtd->ram_channel >= 0) { |
595 | int ram_count; | |
596 | int mod_ram; | |
597 | dma_addr_t ram_src, ram_dst; | |
598 | unsigned int period_size = snd_pcm_lib_period_bytes(substream); | |
599 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
600 | /* reading ram before asp should be safe | |
601 | * as long as the asp transfers less than a ping size | |
602 | * of bytes between the 2 reads | |
603 | */ | |
604 | edma_get_position(prtd->ram_channel, | |
605 | &ram_src, &ram_dst); | |
606 | edma_get_position(prtd->asp_channel, | |
607 | &asp_src, &asp_dst); | |
608 | asp_count = asp_src - prtd->asp_params.src; | |
609 | ram_count = ram_src - prtd->ram_params.src; | |
610 | mod_ram = ram_count % period_size; | |
611 | mod_ram -= asp_count; | |
612 | if (mod_ram < 0) | |
613 | mod_ram += period_size; | |
614 | else if (mod_ram == 0) { | |
615 | if (snd_pcm_running(substream)) | |
616 | mod_ram += period_size; | |
617 | } | |
618 | ram_count -= mod_ram; | |
619 | if (ram_count < 0) | |
620 | ram_count += period_size * runtime->periods; | |
621 | } else { | |
622 | edma_get_position(prtd->ram_channel, | |
623 | &ram_src, &ram_dst); | |
624 | ram_count = ram_dst - prtd->ram_params.dst; | |
625 | } | |
626 | asp_count = ram_count; | |
627 | } else { | |
628 | edma_get_position(prtd->asp_channel, &asp_src, &asp_dst); | |
629 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
630 | asp_count = asp_src - runtime->dma_addr; | |
631 | else | |
632 | asp_count = asp_dst - runtime->dma_addr; | |
633 | } | |
310355c1 VB |
634 | spin_unlock(&prtd->lock); |
635 | ||
1587ea31 | 636 | offset = bytes_to_frames(runtime, asp_count); |
310355c1 VB |
637 | if (offset >= runtime->buffer_size) |
638 | offset = 0; | |
639 | ||
640 | return offset; | |
641 | } | |
642 | ||
643 | static int davinci_pcm_open(struct snd_pcm_substream *substream) | |
644 | { | |
645 | struct snd_pcm_runtime *runtime = substream->runtime; | |
646 | struct davinci_runtime_data *prtd; | |
1e224f32 | 647 | struct snd_pcm_hardware *ppcm; |
310355c1 | 648 | int ret = 0; |
81ac55aa | 649 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
57512c64 TK |
650 | struct davinci_pcm_dma_params *pa = rtd->dai->cpu_dai->dma_data; |
651 | struct davinci_pcm_dma_params *params; | |
652 | if (!pa) | |
81ac55aa | 653 | return -ENODEV; |
57512c64 | 654 | params = &pa[substream->stream]; |
310355c1 | 655 | |
1e224f32 TK |
656 | ppcm = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
657 | &pcm_hardware_playback : &pcm_hardware_capture; | |
658 | allocate_sram(substream, params->sram_size, ppcm); | |
659 | snd_soc_set_runtime_hwparams(substream, ppcm); | |
6a90d536 TK |
660 | /* ensure that buffer size is a multiple of period size */ |
661 | ret = snd_pcm_hw_constraint_integer(runtime, | |
662 | SNDRV_PCM_HW_PARAM_PERIODS); | |
663 | if (ret < 0) | |
664 | return ret; | |
310355c1 VB |
665 | |
666 | prtd = kzalloc(sizeof(struct davinci_runtime_data), GFP_KERNEL); | |
667 | if (prtd == NULL) | |
668 | return -ENOMEM; | |
669 | ||
670 | spin_lock_init(&prtd->lock); | |
81ac55aa | 671 | prtd->params = params; |
1e224f32 TK |
672 | prtd->asp_channel = -1; |
673 | prtd->asp_link[0] = prtd->asp_link[1] = -1; | |
674 | prtd->ram_channel = -1; | |
675 | prtd->ram_link = -1; | |
676 | prtd->ram_link2 = -1; | |
310355c1 VB |
677 | |
678 | runtime->private_data = prtd; | |
679 | ||
680 | ret = davinci_pcm_dma_request(substream); | |
681 | if (ret) { | |
682 | printk(KERN_ERR "davinci_pcm: Failed to get dma channels\n"); | |
683 | kfree(prtd); | |
684 | } | |
685 | ||
686 | return ret; | |
687 | } | |
688 | ||
689 | static int davinci_pcm_close(struct snd_pcm_substream *substream) | |
690 | { | |
691 | struct snd_pcm_runtime *runtime = substream->runtime; | |
692 | struct davinci_runtime_data *prtd = runtime->private_data; | |
693 | ||
1e224f32 TK |
694 | if (prtd->ram_channel >= 0) |
695 | edma_stop(prtd->ram_channel); | |
696 | if (prtd->asp_channel >= 0) | |
697 | edma_stop(prtd->asp_channel); | |
698 | if (prtd->asp_link[0] >= 0) | |
699 | edma_unlink(prtd->asp_link[0]); | |
700 | if (prtd->asp_link[1] >= 0) | |
701 | edma_unlink(prtd->asp_link[1]); | |
702 | if (prtd->ram_link >= 0) | |
703 | edma_unlink(prtd->ram_link); | |
704 | ||
705 | if (prtd->asp_link[0] >= 0) | |
706 | edma_free_slot(prtd->asp_link[0]); | |
707 | if (prtd->asp_link[1] >= 0) | |
708 | edma_free_slot(prtd->asp_link[1]); | |
709 | if (prtd->asp_channel >= 0) | |
710 | edma_free_channel(prtd->asp_channel); | |
711 | if (prtd->ram_link >= 0) | |
712 | edma_free_slot(prtd->ram_link); | |
713 | if (prtd->ram_link2 >= 0) | |
714 | edma_free_slot(prtd->ram_link2); | |
715 | if (prtd->ram_channel >= 0) | |
716 | edma_free_channel(prtd->ram_channel); | |
310355c1 VB |
717 | |
718 | kfree(prtd); | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | static int davinci_pcm_hw_params(struct snd_pcm_substream *substream, | |
724 | struct snd_pcm_hw_params *hw_params) | |
725 | { | |
726 | return snd_pcm_lib_malloc_pages(substream, | |
727 | params_buffer_bytes(hw_params)); | |
728 | } | |
729 | ||
730 | static int davinci_pcm_hw_free(struct snd_pcm_substream *substream) | |
731 | { | |
732 | return snd_pcm_lib_free_pages(substream); | |
733 | } | |
734 | ||
735 | static int davinci_pcm_mmap(struct snd_pcm_substream *substream, | |
736 | struct vm_area_struct *vma) | |
737 | { | |
738 | struct snd_pcm_runtime *runtime = substream->runtime; | |
739 | ||
740 | return dma_mmap_writecombine(substream->pcm->card->dev, vma, | |
741 | runtime->dma_area, | |
742 | runtime->dma_addr, | |
743 | runtime->dma_bytes); | |
744 | } | |
745 | ||
b2a19d02 | 746 | static struct snd_pcm_ops davinci_pcm_ops = { |
310355c1 VB |
747 | .open = davinci_pcm_open, |
748 | .close = davinci_pcm_close, | |
749 | .ioctl = snd_pcm_lib_ioctl, | |
750 | .hw_params = davinci_pcm_hw_params, | |
751 | .hw_free = davinci_pcm_hw_free, | |
752 | .prepare = davinci_pcm_prepare, | |
753 | .trigger = davinci_pcm_trigger, | |
754 | .pointer = davinci_pcm_pointer, | |
755 | .mmap = davinci_pcm_mmap, | |
756 | }; | |
757 | ||
1e224f32 TK |
758 | static int davinci_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream, |
759 | size_t size) | |
310355c1 VB |
760 | { |
761 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | |
762 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
310355c1 VB |
763 | |
764 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
765 | buf->dev.dev = pcm->card->dev; | |
766 | buf->private_data = NULL; | |
767 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, | |
768 | &buf->addr, GFP_KERNEL); | |
769 | ||
9cd28ab0 AB |
770 | pr_debug("davinci_pcm: preallocate_dma_buffer: area=%p, addr=%p, " |
771 | "size=%d\n", (void *) buf->area, (void *) buf->addr, size); | |
310355c1 VB |
772 | |
773 | if (!buf->area) | |
774 | return -ENOMEM; | |
775 | ||
776 | buf->bytes = size; | |
777 | return 0; | |
778 | } | |
779 | ||
780 | static void davinci_pcm_free(struct snd_pcm *pcm) | |
781 | { | |
782 | struct snd_pcm_substream *substream; | |
783 | struct snd_dma_buffer *buf; | |
784 | int stream; | |
785 | ||
786 | for (stream = 0; stream < 2; stream++) { | |
1e224f32 | 787 | struct snd_dma_buffer *iram_dma; |
310355c1 VB |
788 | substream = pcm->streams[stream].substream; |
789 | if (!substream) | |
790 | continue; | |
791 | ||
792 | buf = &substream->dma_buffer; | |
793 | if (!buf->area) | |
794 | continue; | |
795 | ||
796 | dma_free_writecombine(pcm->card->dev, buf->bytes, | |
797 | buf->area, buf->addr); | |
798 | buf->area = NULL; | |
1e224f32 TK |
799 | iram_dma = (struct snd_dma_buffer *)buf->private_data; |
800 | if (iram_dma) { | |
801 | sram_free(iram_dma->area, iram_dma->bytes); | |
802 | kfree(iram_dma); | |
803 | } | |
310355c1 VB |
804 | } |
805 | } | |
806 | ||
807 | static u64 davinci_pcm_dmamask = 0xffffffff; | |
808 | ||
809 | static int davinci_pcm_new(struct snd_card *card, | |
9cb132d7 | 810 | struct snd_soc_dai *dai, struct snd_pcm *pcm) |
310355c1 VB |
811 | { |
812 | int ret; | |
813 | ||
814 | if (!card->dev->dma_mask) | |
815 | card->dev->dma_mask = &davinci_pcm_dmamask; | |
816 | if (!card->dev->coherent_dma_mask) | |
817 | card->dev->coherent_dma_mask = 0xffffffff; | |
818 | ||
819 | if (dai->playback.channels_min) { | |
820 | ret = davinci_pcm_preallocate_dma_buffer(pcm, | |
1e224f32 TK |
821 | SNDRV_PCM_STREAM_PLAYBACK, |
822 | pcm_hardware_playback.buffer_bytes_max); | |
310355c1 VB |
823 | if (ret) |
824 | return ret; | |
825 | } | |
826 | ||
827 | if (dai->capture.channels_min) { | |
828 | ret = davinci_pcm_preallocate_dma_buffer(pcm, | |
1e224f32 TK |
829 | SNDRV_PCM_STREAM_CAPTURE, |
830 | pcm_hardware_capture.buffer_bytes_max); | |
310355c1 VB |
831 | if (ret) |
832 | return ret; | |
833 | } | |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
838 | struct snd_soc_platform davinci_soc_platform = { | |
839 | .name = "davinci-audio", | |
840 | .pcm_ops = &davinci_pcm_ops, | |
841 | .pcm_new = davinci_pcm_new, | |
842 | .pcm_free = davinci_pcm_free, | |
843 | }; | |
844 | EXPORT_SYMBOL_GPL(davinci_soc_platform); | |
845 | ||
c9b3a40f | 846 | static int __init davinci_soc_platform_init(void) |
958e792c MB |
847 | { |
848 | return snd_soc_register_platform(&davinci_soc_platform); | |
849 | } | |
850 | module_init(davinci_soc_platform_init); | |
851 | ||
852 | static void __exit davinci_soc_platform_exit(void) | |
853 | { | |
854 | snd_soc_unregister_platform(&davinci_soc_platform); | |
855 | } | |
856 | module_exit(davinci_soc_platform_exit); | |
857 | ||
310355c1 VB |
858 | MODULE_AUTHOR("Vladimir Barinov"); |
859 | MODULE_DESCRIPTION("TI DAVINCI PCM DMA module"); | |
860 | MODULE_LICENSE("GPL"); |