Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 1 | /* |
| 2 | * oxfw_pcm.c - a part of driver for OXFW970/971 based devices |
| 3 | * |
| 4 | * Copyright (c) Clemens Ladisch <clemens@ladisch.de> |
| 5 | * Licensed under the terms of the GNU General Public License, version 2. |
| 6 | */ |
| 7 | |
| 8 | #include "oxfw.h" |
| 9 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 10 | static int hw_rule_rate(struct snd_pcm_hw_params *params, |
| 11 | struct snd_pcm_hw_rule *rule) |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 12 | { |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 13 | u8 **formats = rule->private; |
| 14 | struct snd_interval *r = |
| 15 | hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| 16 | const struct snd_interval *c = |
| 17 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| 18 | struct snd_interval t = { |
| 19 | .min = UINT_MAX, .max = 0, .integer = 1 |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 20 | }; |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 21 | struct snd_oxfw_stream_formation formation; |
| 22 | unsigned int i, err; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 23 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 24 | for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { |
| 25 | if (formats[i] == NULL) |
| 26 | continue; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 27 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 28 | err = snd_oxfw_stream_parse_format(formats[i], &formation); |
| 29 | if (err < 0) |
| 30 | continue; |
| 31 | if (!snd_interval_test(c, formation.pcm)) |
| 32 | continue; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 33 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 34 | t.min = min(t.min, formation.rate); |
| 35 | t.max = max(t.max, formation.rate); |
| 36 | |
| 37 | } |
| 38 | return snd_interval_refine(r, &t); |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 39 | } |
| 40 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 41 | static int hw_rule_channels(struct snd_pcm_hw_params *params, |
| 42 | struct snd_pcm_hw_rule *rule) |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 43 | { |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 44 | u8 **formats = rule->private; |
| 45 | struct snd_interval *c = |
| 46 | hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| 47 | const struct snd_interval *r = |
| 48 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); |
| 49 | struct snd_oxfw_stream_formation formation; |
| 50 | unsigned int i, j, err; |
| 51 | unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0}; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 52 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 53 | count = 0; |
| 54 | for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { |
| 55 | if (formats[i] == NULL) |
| 56 | break; |
| 57 | |
| 58 | err = snd_oxfw_stream_parse_format(formats[i], &formation); |
| 59 | if (err < 0) |
| 60 | continue; |
| 61 | if (!snd_interval_test(r, formation.rate)) |
| 62 | continue; |
| 63 | if (list[count] == formation.pcm) |
| 64 | continue; |
| 65 | |
| 66 | for (j = 0; j < ARRAY_SIZE(list); j++) { |
| 67 | if (list[j] == formation.pcm) |
| 68 | break; |
| 69 | } |
| 70 | if (j == ARRAY_SIZE(list)) { |
| 71 | list[count] = formation.pcm; |
| 72 | if (++count == ARRAY_SIZE(list)) |
| 73 | break; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | return snd_interval_list(c, count, list, 0); |
| 78 | } |
| 79 | |
| 80 | static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats) |
| 81 | { |
| 82 | struct snd_oxfw_stream_formation formation; |
| 83 | unsigned int i, err; |
| 84 | |
| 85 | hw->channels_min = UINT_MAX; |
| 86 | hw->channels_max = 0; |
| 87 | |
| 88 | hw->rate_min = UINT_MAX; |
| 89 | hw->rate_max = 0; |
| 90 | hw->rates = 0; |
| 91 | |
| 92 | for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { |
| 93 | if (formats[i] == NULL) |
| 94 | break; |
| 95 | |
| 96 | err = snd_oxfw_stream_parse_format(formats[i], &formation); |
| 97 | if (err < 0) |
| 98 | continue; |
| 99 | |
| 100 | hw->channels_min = min(hw->channels_min, formation.pcm); |
| 101 | hw->channels_max = max(hw->channels_max, formation.pcm); |
| 102 | |
| 103 | hw->rate_min = min(hw->rate_min, formation.rate); |
| 104 | hw->rate_max = max(hw->rate_max, formation.rate); |
| 105 | hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | static void limit_period_and_buffer(struct snd_pcm_hardware *hw) |
| 110 | { |
| 111 | hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */ |
| 112 | hw->periods_max = UINT_MAX; |
| 113 | |
| 114 | hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */ |
| 115 | |
| 116 | /* Just to prevent from allocating much pages. */ |
| 117 | hw->period_bytes_max = hw->period_bytes_min * 2048; |
| 118 | hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static int pcm_open(struct snd_pcm_substream *substream) |
| 122 | { |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 123 | struct snd_oxfw *oxfw = substream->private_data; |
| 124 | struct snd_pcm_runtime *runtime = substream->runtime; |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 125 | u8 **formats; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 126 | int err; |
| 127 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 128 | formats = oxfw->rx_stream_formats; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 129 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 130 | runtime->hw.info = SNDRV_PCM_INFO_BATCH | |
| 131 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 132 | SNDRV_PCM_INFO_INTERLEAVED | |
| 133 | SNDRV_PCM_INFO_MMAP | |
| 134 | SNDRV_PCM_INFO_MMAP_VALID; |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 135 | |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 136 | limit_channels_and_rates(&runtime->hw, formats); |
| 137 | limit_period_and_buffer(&runtime->hw); |
| 138 | |
| 139 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
| 140 | hw_rule_channels, formats, |
| 141 | SNDRV_PCM_HW_PARAM_RATE, -1); |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 142 | if (err < 0) |
| 143 | goto end; |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 144 | |
| 145 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| 146 | hw_rule_rate, formats, |
| 147 | SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 148 | if (err < 0) |
| 149 | goto end; |
| 150 | |
| 151 | err = amdtp_stream_add_pcm_hw_constraints(&oxfw->rx_stream, runtime); |
Takashi Sakamoto | 5cd1d3f | 2014-12-09 00:10:42 +0900 | [diff] [blame^] | 152 | if (err < 0) |
| 153 | goto end; |
| 154 | |
| 155 | snd_pcm_set_sync(substream); |
Takashi Sakamoto | 3713d93 | 2014-11-29 00:59:28 +0900 | [diff] [blame] | 156 | end: |
| 157 | return err; |
| 158 | } |
| 159 | |
| 160 | static int pcm_close(struct snd_pcm_substream *substream) |
| 161 | { |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | static int pcm_hw_params(struct snd_pcm_substream *substream, |
| 166 | struct snd_pcm_hw_params *hw_params) |
| 167 | { |
| 168 | struct snd_oxfw *oxfw = substream->private_data; |
| 169 | int err; |
| 170 | |
| 171 | mutex_lock(&oxfw->mutex); |
| 172 | |
| 173 | snd_oxfw_stream_stop_simplex(oxfw); |
| 174 | |
| 175 | err = snd_pcm_lib_alloc_vmalloc_buffer(substream, |
| 176 | params_buffer_bytes(hw_params)); |
| 177 | if (err < 0) |
| 178 | goto error; |
| 179 | |
| 180 | amdtp_stream_set_parameters(&oxfw->rx_stream, |
| 181 | params_rate(hw_params), |
| 182 | params_channels(hw_params), |
| 183 | 0); |
| 184 | |
| 185 | amdtp_stream_set_pcm_format(&oxfw->rx_stream, |
| 186 | params_format(hw_params)); |
| 187 | |
| 188 | err = avc_general_set_sig_fmt(oxfw->unit, params_rate(hw_params), |
| 189 | AVC_GENERAL_PLUG_DIR_IN, 0); |
| 190 | if (err < 0) { |
| 191 | dev_err(&oxfw->unit->device, "failed to set sample rate\n"); |
| 192 | goto err_buffer; |
| 193 | } |
| 194 | |
| 195 | return 0; |
| 196 | |
| 197 | err_buffer: |
| 198 | snd_pcm_lib_free_vmalloc_buffer(substream); |
| 199 | error: |
| 200 | mutex_unlock(&oxfw->mutex); |
| 201 | return err; |
| 202 | } |
| 203 | |
| 204 | static int pcm_hw_free(struct snd_pcm_substream *substream) |
| 205 | { |
| 206 | struct snd_oxfw *oxfw = substream->private_data; |
| 207 | |
| 208 | mutex_lock(&oxfw->mutex); |
| 209 | snd_oxfw_stream_stop_simplex(oxfw); |
| 210 | mutex_unlock(&oxfw->mutex); |
| 211 | |
| 212 | return snd_pcm_lib_free_vmalloc_buffer(substream); |
| 213 | } |
| 214 | |
| 215 | static int pcm_prepare(struct snd_pcm_substream *substream) |
| 216 | { |
| 217 | struct snd_oxfw *oxfw = substream->private_data; |
| 218 | int err; |
| 219 | |
| 220 | mutex_lock(&oxfw->mutex); |
| 221 | |
| 222 | snd_oxfw_stream_stop_simplex(oxfw); |
| 223 | |
| 224 | err = snd_oxfw_stream_start_simplex(oxfw); |
| 225 | if (err < 0) |
| 226 | goto end; |
| 227 | |
| 228 | amdtp_stream_pcm_prepare(&oxfw->rx_stream); |
| 229 | end: |
| 230 | mutex_unlock(&oxfw->mutex); |
| 231 | return err; |
| 232 | } |
| 233 | |
| 234 | static int pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 235 | { |
| 236 | struct snd_oxfw *oxfw = substream->private_data; |
| 237 | struct snd_pcm_substream *pcm; |
| 238 | |
| 239 | switch (cmd) { |
| 240 | case SNDRV_PCM_TRIGGER_START: |
| 241 | pcm = substream; |
| 242 | break; |
| 243 | case SNDRV_PCM_TRIGGER_STOP: |
| 244 | pcm = NULL; |
| 245 | break; |
| 246 | default: |
| 247 | return -EINVAL; |
| 248 | } |
| 249 | amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm); |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static snd_pcm_uframes_t pcm_pointer(struct snd_pcm_substream *substream) |
| 254 | { |
| 255 | struct snd_oxfw *oxfw = substream->private_data; |
| 256 | |
| 257 | return amdtp_stream_pcm_pointer(&oxfw->rx_stream); |
| 258 | } |
| 259 | |
| 260 | int snd_oxfw_create_pcm(struct snd_oxfw *oxfw) |
| 261 | { |
| 262 | static struct snd_pcm_ops ops = { |
| 263 | .open = pcm_open, |
| 264 | .close = pcm_close, |
| 265 | .ioctl = snd_pcm_lib_ioctl, |
| 266 | .hw_params = pcm_hw_params, |
| 267 | .hw_free = pcm_hw_free, |
| 268 | .prepare = pcm_prepare, |
| 269 | .trigger = pcm_trigger, |
| 270 | .pointer = pcm_pointer, |
| 271 | .page = snd_pcm_lib_get_vmalloc_page, |
| 272 | .mmap = snd_pcm_lib_mmap_vmalloc, |
| 273 | }; |
| 274 | struct snd_pcm *pcm; |
| 275 | int err; |
| 276 | |
| 277 | err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, 0, &pcm); |
| 278 | if (err < 0) |
| 279 | return err; |
| 280 | pcm->private_data = oxfw; |
| 281 | strcpy(pcm->name, oxfw->card->shortname); |
| 282 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ops); |
| 283 | return 0; |
| 284 | } |