Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 1 | /* |
Jassi Brar | 4b640cf | 2010-11-22 15:35:57 +0900 | [diff] [blame] | 2 | * dma.c -- ALSA Soc Audio Layer |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 3 | * |
| 4 | * (c) 2006 Wolfson Microelectronics PLC. |
| 5 | * Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com |
| 6 | * |
Ben Dooks | c8efef1 | 2009-02-28 17:09:57 +0000 | [diff] [blame] | 7 | * Copyright 2004-2005 Simtec Electronics |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 8 | * http://armlinux.simtec.co.uk/ |
| 9 | * Ben Dooks <ben@simtec.co.uk> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify it |
| 12 | * under the terms of the GNU General Public License as published by the |
| 13 | * Free Software Foundation; either version 2 of the License, or (at your |
| 14 | * option) any later version. |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 15 | */ |
| 16 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 17 | #include <linux/slab.h> |
| 18 | #include <linux/dma-mapping.h> |
Paul Gortmaker | da155d5 | 2011-07-15 12:38:28 -0400 | [diff] [blame^] | 19 | #include <linux/module.h> |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 20 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 21 | #include <sound/soc.h> |
Seungwhan Youn | 0378b6a | 2011-01-11 07:26:06 +0900 | [diff] [blame] | 22 | #include <sound/pcm_params.h> |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 23 | |
| 24 | #include <asm/dma.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 25 | #include <mach/hardware.h> |
| 26 | #include <mach/dma.h> |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 27 | |
Jassi Brar | 4b640cf | 2010-11-22 15:35:57 +0900 | [diff] [blame] | 28 | #include "dma.h" |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 29 | |
Seungwhan Youn | f7f7418 | 2011-01-07 13:51:26 +0900 | [diff] [blame] | 30 | #define ST_RUNNING (1<<0) |
| 31 | #define ST_OPENED (1<<1) |
| 32 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 33 | static const struct snd_pcm_hardware dma_hardware = { |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 34 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 35 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 36 | SNDRV_PCM_INFO_MMAP | |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 37 | SNDRV_PCM_INFO_MMAP_VALID | |
| 38 | SNDRV_PCM_INFO_PAUSE | |
| 39 | SNDRV_PCM_INFO_RESUME, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 40 | .formats = SNDRV_PCM_FMTBIT_S16_LE | |
| 41 | SNDRV_PCM_FMTBIT_U16_LE | |
| 42 | SNDRV_PCM_FMTBIT_U8 | |
| 43 | SNDRV_PCM_FMTBIT_S8, |
| 44 | .channels_min = 2, |
| 45 | .channels_max = 2, |
| 46 | .buffer_bytes_max = 128*1024, |
| 47 | .period_bytes_min = PAGE_SIZE, |
| 48 | .period_bytes_max = PAGE_SIZE*2, |
| 49 | .periods_min = 2, |
| 50 | .periods_max = 128, |
| 51 | .fifo_size = 32, |
| 52 | }; |
| 53 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 54 | struct runtime_data { |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 55 | spinlock_t lock; |
| 56 | int state; |
| 57 | unsigned int dma_loaded; |
| 58 | unsigned int dma_limit; |
| 59 | unsigned int dma_period; |
| 60 | dma_addr_t dma_start; |
| 61 | dma_addr_t dma_pos; |
| 62 | dma_addr_t dma_end; |
Jassi Brar | faa3177 | 2009-11-17 16:53:23 +0900 | [diff] [blame] | 63 | struct s3c_dma_params *params; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 64 | }; |
| 65 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 66 | /* dma_enqueue |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 67 | * |
| 68 | * place a dma buffer onto the queue for the dma system |
| 69 | * to handle. |
| 70 | */ |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 71 | static void dma_enqueue(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 72 | { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 73 | struct runtime_data *prtd = substream->runtime->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 74 | dma_addr_t pos = prtd->dma_pos; |
Ben Dooks | e3d8024 | 2009-09-22 16:48:56 +0100 | [diff] [blame] | 75 | unsigned int limit; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 76 | int ret; |
| 77 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 78 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 79 | |
Jassi Brar | d3ff5a3 | 2009-11-17 16:53:31 +0900 | [diff] [blame] | 80 | if (s3c_dma_has_circular()) |
Ben Dooks | e3d8024 | 2009-09-22 16:48:56 +0100 | [diff] [blame] | 81 | limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period; |
Jassi Brar | d3ff5a3 | 2009-11-17 16:53:31 +0900 | [diff] [blame] | 82 | else |
Ben Dooks | e3d8024 | 2009-09-22 16:48:56 +0100 | [diff] [blame] | 83 | limit = prtd->dma_limit; |
| 84 | |
Jassi Brar | d3ff5a3 | 2009-11-17 16:53:31 +0900 | [diff] [blame] | 85 | pr_debug("%s: loaded %d, limit %d\n", |
| 86 | __func__, prtd->dma_loaded, limit); |
Ben Dooks | e3d8024 | 2009-09-22 16:48:56 +0100 | [diff] [blame] | 87 | |
| 88 | while (prtd->dma_loaded < limit) { |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 89 | unsigned long len = prtd->dma_period; |
| 90 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 91 | pr_debug("dma_loaded: %d\n", prtd->dma_loaded); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 92 | |
| 93 | if ((pos + len) > prtd->dma_end) { |
| 94 | len = prtd->dma_end - pos; |
Joe Perches | 147fcf1 | 2010-09-11 22:10:59 -0700 | [diff] [blame] | 95 | pr_debug("%s: corrected dma len %ld\n", __func__, len); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 96 | } |
| 97 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 98 | ret = s3c2410_dma_enqueue(prtd->params->channel, |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 99 | substream, pos, len); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 100 | |
| 101 | if (ret == 0) { |
| 102 | prtd->dma_loaded++; |
| 103 | pos += prtd->dma_period; |
| 104 | if (pos >= prtd->dma_end) |
| 105 | pos = prtd->dma_start; |
| 106 | } else |
| 107 | break; |
| 108 | } |
| 109 | |
| 110 | prtd->dma_pos = pos; |
| 111 | } |
| 112 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 113 | static void audio_buffdone(struct s3c2410_dma_chan *channel, |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 114 | void *dev_id, int size, |
| 115 | enum s3c2410_dma_buffresult result) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 116 | { |
| 117 | struct snd_pcm_substream *substream = dev_id; |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 118 | struct runtime_data *prtd; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 119 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 120 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 121 | |
| 122 | if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR) |
| 123 | return; |
| 124 | |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 125 | prtd = substream->runtime->private_data; |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 126 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 127 | if (substream) |
| 128 | snd_pcm_period_elapsed(substream); |
| 129 | |
| 130 | spin_lock(&prtd->lock); |
Ben Dooks | e3d8024 | 2009-09-22 16:48:56 +0100 | [diff] [blame] | 131 | if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) { |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 132 | prtd->dma_loaded--; |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 133 | dma_enqueue(substream); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | spin_unlock(&prtd->lock); |
| 137 | } |
| 138 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 139 | static int dma_hw_params(struct snd_pcm_substream *substream, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 140 | struct snd_pcm_hw_params *params) |
| 141 | { |
| 142 | struct snd_pcm_runtime *runtime = substream->runtime; |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 143 | struct runtime_data *prtd = runtime->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 144 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 145 | unsigned long totbytes = params_buffer_bytes(params); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 146 | struct s3c_dma_params *dma = |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 147 | snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 148 | int ret = 0; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 149 | |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 150 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 151 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 152 | |
| 153 | /* return if this is a bufferless transfer e.g. |
| 154 | * codec <--> BT codec or GSM modem -- lg FIXME */ |
| 155 | if (!dma) |
| 156 | return 0; |
| 157 | |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 158 | /* this may get called several times by oss emulation |
| 159 | * with different params -HW */ |
| 160 | if (prtd->params == NULL) { |
| 161 | /* prepare DMA */ |
| 162 | prtd->params = dma; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 163 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 164 | pr_debug("params %p, client %p, channel %d\n", prtd->params, |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 165 | prtd->params->client, prtd->params->channel); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 166 | |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 167 | ret = s3c2410_dma_request(prtd->params->channel, |
| 168 | prtd->params->client, NULL); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 169 | |
Davide Rizzo | d642617 | 2008-05-05 14:56:07 +0200 | [diff] [blame] | 170 | if (ret < 0) { |
Mark Brown | b52a519 | 2009-03-06 18:13:43 +0000 | [diff] [blame] | 171 | printk(KERN_ERR "failed to get dma channel\n"); |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 172 | return ret; |
| 173 | } |
Ben Dooks | e3d8024 | 2009-09-22 16:48:56 +0100 | [diff] [blame] | 174 | |
| 175 | /* use the circular buffering if we have it available. */ |
| 176 | if (s3c_dma_has_circular()) |
| 177 | s3c2410_dma_setflags(prtd->params->channel, |
| 178 | S3C2410_DMAF_CIRCULAR); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 179 | } |
| 180 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 181 | s3c2410_dma_set_buffdone_fn(prtd->params->channel, |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 182 | audio_buffdone); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 183 | |
| 184 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 185 | |
| 186 | runtime->dma_bytes = totbytes; |
| 187 | |
| 188 | spin_lock_irq(&prtd->lock); |
| 189 | prtd->dma_loaded = 0; |
| 190 | prtd->dma_limit = runtime->hw.periods_min; |
| 191 | prtd->dma_period = params_period_bytes(params); |
| 192 | prtd->dma_start = runtime->dma_addr; |
| 193 | prtd->dma_pos = prtd->dma_start; |
| 194 | prtd->dma_end = prtd->dma_start + totbytes; |
| 195 | spin_unlock_irq(&prtd->lock); |
| 196 | |
| 197 | return 0; |
| 198 | } |
| 199 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 200 | static int dma_hw_free(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 201 | { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 202 | struct runtime_data *prtd = substream->runtime->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 203 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 204 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 205 | |
| 206 | /* TODO - do we need to ensure DMA flushed */ |
| 207 | snd_pcm_set_runtime_buffer(substream, NULL); |
| 208 | |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 209 | if (prtd->params) { |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 210 | s3c2410_dma_free(prtd->params->channel, prtd->params->client); |
| 211 | prtd->params = NULL; |
| 212 | } |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 217 | static int dma_prepare(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 218 | { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 219 | struct runtime_data *prtd = substream->runtime->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 220 | int ret = 0; |
| 221 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 222 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 223 | |
| 224 | /* return if this is a bufferless transfer e.g. |
| 225 | * codec <--> BT codec or GSM modem -- lg FIXME */ |
| 226 | if (!prtd->params) |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 227 | return 0; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 228 | |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 229 | /* channel needs configuring for mem=>device, increment memory addr, |
| 230 | * sync to pclk, half-word transfers to the IIS-FIFO. */ |
| 231 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 232 | s3c2410_dma_devconfig(prtd->params->channel, |
Ben Dooks | 8970ef4 | 2009-03-19 15:02:34 +0000 | [diff] [blame] | 233 | S3C2410_DMASRC_MEM, |
| 234 | prtd->params->dma_addr); |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 235 | } else { |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 236 | s3c2410_dma_devconfig(prtd->params->channel, |
Ben Dooks | 8970ef4 | 2009-03-19 15:02:34 +0000 | [diff] [blame] | 237 | S3C2410_DMASRC_HW, |
| 238 | prtd->params->dma_addr); |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 239 | } |
| 240 | |
Ben Dooks | 8970ef4 | 2009-03-19 15:02:34 +0000 | [diff] [blame] | 241 | s3c2410_dma_config(prtd->params->channel, |
| 242 | prtd->params->dma_size); |
| 243 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 244 | /* flush the DMA channel */ |
| 245 | s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH); |
| 246 | prtd->dma_loaded = 0; |
| 247 | prtd->dma_pos = prtd->dma_start; |
| 248 | |
| 249 | /* enqueue dma buffers */ |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 250 | dma_enqueue(substream); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 251 | |
| 252 | return ret; |
| 253 | } |
| 254 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 255 | static int dma_trigger(struct snd_pcm_substream *substream, int cmd) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 256 | { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 257 | struct runtime_data *prtd = substream->runtime->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 258 | int ret = 0; |
| 259 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 260 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 261 | |
| 262 | spin_lock(&prtd->lock); |
| 263 | |
| 264 | switch (cmd) { |
| 265 | case SNDRV_PCM_TRIGGER_START: |
| 266 | case SNDRV_PCM_TRIGGER_RESUME: |
| 267 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 268 | prtd->state |= ST_RUNNING; |
| 269 | s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_START); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 270 | break; |
| 271 | |
| 272 | case SNDRV_PCM_TRIGGER_STOP: |
| 273 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 274 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 275 | prtd->state &= ~ST_RUNNING; |
| 276 | s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STOP); |
| 277 | break; |
| 278 | |
| 279 | default: |
| 280 | ret = -EINVAL; |
| 281 | break; |
| 282 | } |
| 283 | |
| 284 | spin_unlock(&prtd->lock); |
| 285 | |
| 286 | return ret; |
| 287 | } |
| 288 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 289 | static snd_pcm_uframes_t |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 290 | dma_pointer(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 291 | { |
| 292 | struct snd_pcm_runtime *runtime = substream->runtime; |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 293 | struct runtime_data *prtd = runtime->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 294 | unsigned long res; |
| 295 | dma_addr_t src, dst; |
| 296 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 297 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 298 | |
| 299 | spin_lock(&prtd->lock); |
| 300 | s3c2410_dma_getposition(prtd->params->channel, &src, &dst); |
| 301 | |
| 302 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 303 | res = dst - prtd->dma_start; |
| 304 | else |
| 305 | res = src - prtd->dma_start; |
| 306 | |
| 307 | spin_unlock(&prtd->lock); |
| 308 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 309 | pr_debug("Pointer %x %x\n", src, dst); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 310 | |
| 311 | /* we seem to be getting the odd error from the pcm library due |
| 312 | * to out-of-bounds pointers. this is maybe due to the dma engine |
| 313 | * not having loaded the new values for the channel before being |
Justin P. Mattock | ceade6c | 2011-02-24 22:16:37 -0800 | [diff] [blame] | 314 | * called... (todo - fix ) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 315 | */ |
| 316 | |
| 317 | if (res >= snd_pcm_lib_buffer_bytes(substream)) { |
| 318 | if (res == snd_pcm_lib_buffer_bytes(substream)) |
| 319 | res = 0; |
| 320 | } |
| 321 | |
| 322 | return bytes_to_frames(substream->runtime, res); |
| 323 | } |
| 324 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 325 | static int dma_open(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 326 | { |
| 327 | struct snd_pcm_runtime *runtime = substream->runtime; |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 328 | struct runtime_data *prtd; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 329 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 330 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 331 | |
Shine Liu | f61c890 | 2009-08-20 23:02:23 +0800 | [diff] [blame] | 332 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 333 | snd_soc_set_runtime_hwparams(substream, &dma_hardware); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 334 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 335 | prtd = kzalloc(sizeof(struct runtime_data), GFP_KERNEL); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 336 | if (prtd == NULL) |
| 337 | return -ENOMEM; |
| 338 | |
Zoltan Devai | c72816b | 2007-05-22 16:17:05 +0200 | [diff] [blame] | 339 | spin_lock_init(&prtd->lock); |
| 340 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 341 | runtime->private_data = prtd; |
| 342 | return 0; |
| 343 | } |
| 344 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 345 | static int dma_close(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 346 | { |
| 347 | struct snd_pcm_runtime *runtime = substream->runtime; |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 348 | struct runtime_data *prtd = runtime->private_data; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 349 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 350 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 351 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 352 | if (!prtd) |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 353 | pr_debug("dma_close called with prtd == NULL\n"); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 354 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 355 | kfree(prtd); |
| 356 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 357 | return 0; |
| 358 | } |
| 359 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 360 | static int dma_mmap(struct snd_pcm_substream *substream, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 361 | struct vm_area_struct *vma) |
| 362 | { |
| 363 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 364 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 365 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 366 | |
| 367 | return dma_mmap_writecombine(substream->pcm->card->dev, vma, |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 368 | runtime->dma_area, |
| 369 | runtime->dma_addr, |
| 370 | runtime->dma_bytes); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 371 | } |
| 372 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 373 | static struct snd_pcm_ops dma_ops = { |
| 374 | .open = dma_open, |
| 375 | .close = dma_close, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 376 | .ioctl = snd_pcm_lib_ioctl, |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 377 | .hw_params = dma_hw_params, |
| 378 | .hw_free = dma_hw_free, |
| 379 | .prepare = dma_prepare, |
| 380 | .trigger = dma_trigger, |
| 381 | .pointer = dma_pointer, |
| 382 | .mmap = dma_mmap, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 383 | }; |
| 384 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 385 | static int preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 386 | { |
| 387 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
| 388 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 389 | size_t size = dma_hardware.buffer_bytes_max; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 390 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 391 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 392 | |
| 393 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 394 | buf->dev.dev = pcm->card->dev; |
| 395 | buf->private_data = NULL; |
| 396 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, |
| 397 | &buf->addr, GFP_KERNEL); |
| 398 | if (!buf->area) |
| 399 | return -ENOMEM; |
| 400 | buf->bytes = size; |
| 401 | return 0; |
| 402 | } |
| 403 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 404 | static void dma_free_dma_buffers(struct snd_pcm *pcm) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 405 | { |
| 406 | struct snd_pcm_substream *substream; |
| 407 | struct snd_dma_buffer *buf; |
| 408 | int stream; |
| 409 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 410 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 411 | |
| 412 | for (stream = 0; stream < 2; stream++) { |
| 413 | substream = pcm->streams[stream].substream; |
| 414 | if (!substream) |
| 415 | continue; |
| 416 | |
| 417 | buf = &substream->dma_buffer; |
| 418 | if (!buf->area) |
| 419 | continue; |
| 420 | |
| 421 | dma_free_writecombine(pcm->card->dev, buf->bytes, |
| 422 | buf->area, buf->addr); |
| 423 | buf->area = NULL; |
| 424 | } |
| 425 | } |
| 426 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 427 | static u64 dma_mask = DMA_BIT_MASK(32); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 428 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 429 | static int dma_new(struct snd_soc_pcm_runtime *rtd) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 430 | { |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 431 | struct snd_card *card = rtd->card->snd_card; |
| 432 | struct snd_soc_dai *dai = rtd->cpu_dai; |
| 433 | struct snd_pcm *pcm = rtd->pcm; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 434 | int ret = 0; |
| 435 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 436 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 437 | |
| 438 | if (!card->dev->dma_mask) |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 439 | card->dev->dma_mask = &dma_mask; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 440 | if (!card->dev->coherent_dma_mask) |
| 441 | card->dev->coherent_dma_mask = 0xffffffff; |
| 442 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 443 | if (dai->driver->playback.channels_min) { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 444 | ret = preallocate_dma_buffer(pcm, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 445 | SNDRV_PCM_STREAM_PLAYBACK); |
| 446 | if (ret) |
| 447 | goto out; |
| 448 | } |
| 449 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 450 | if (dai->driver->capture.channels_min) { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 451 | ret = preallocate_dma_buffer(pcm, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 452 | SNDRV_PCM_STREAM_CAPTURE); |
| 453 | if (ret) |
| 454 | goto out; |
| 455 | } |
Jassi Brar | 4b640cf | 2010-11-22 15:35:57 +0900 | [diff] [blame] | 456 | out: |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 457 | return ret; |
| 458 | } |
| 459 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 460 | static struct snd_soc_platform_driver samsung_asoc_platform = { |
| 461 | .ops = &dma_ops, |
| 462 | .pcm_new = dma_new, |
| 463 | .pcm_free = dma_free_dma_buffers, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 464 | }; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 465 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 466 | static int __devinit samsung_asoc_platform_probe(struct platform_device *pdev) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 467 | { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 468 | return snd_soc_register_platform(&pdev->dev, &samsung_asoc_platform); |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 469 | } |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 470 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 471 | static int __devexit samsung_asoc_platform_remove(struct platform_device *pdev) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 472 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 473 | snd_soc_unregister_platform(&pdev->dev); |
| 474 | return 0; |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 475 | } |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 476 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 477 | static struct platform_driver asoc_dma_driver = { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 478 | .driver = { |
Jassi Brar | 58bb407 | 2010-11-22 15:35:50 +0900 | [diff] [blame] | 479 | .name = "samsung-audio", |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 480 | .owner = THIS_MODULE, |
| 481 | }, |
| 482 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 483 | .probe = samsung_asoc_platform_probe, |
| 484 | .remove = __devexit_p(samsung_asoc_platform_remove), |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 485 | }; |
| 486 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 487 | static int __init samsung_asoc_init(void) |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 488 | { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 489 | return platform_driver_register(&asoc_dma_driver); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 490 | } |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 491 | module_init(samsung_asoc_init); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 492 | |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 493 | static void __exit samsung_asoc_exit(void) |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 494 | { |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 495 | platform_driver_unregister(&asoc_dma_driver); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 496 | } |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 497 | module_exit(samsung_asoc_exit); |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 498 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 499 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); |
Jassi Brar | c3f2028 | 2010-11-22 15:36:50 +0900 | [diff] [blame] | 500 | MODULE_DESCRIPTION("Samsung ASoC DMA Driver"); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 501 | MODULE_LICENSE("GPL"); |
Jassi Brar | 58bb407 | 2010-11-22 15:35:50 +0900 | [diff] [blame] | 502 | MODULE_ALIAS("platform:samsung-audio"); |