^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * sh_dac_audio.c - SuperH DAC audio driver for ALSA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2009 by Rafael Ignacio Zurita <rizurita@yahoo.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Based on sh_dac_audio.c (Copyright (C) 2004, 2005 by Andriy Skulysh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/hrtimer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <sound/initval.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <sound/pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <sound/sh_dac_audio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/clock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/hd64461.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <mach/hp6xx.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <cpu/dac.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) MODULE_AUTHOR("Rafael Ignacio Zurita <rizurita@yahoo.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) MODULE_DESCRIPTION("SuperH DAC audio driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) MODULE_SUPPORTED_DEVICE("{{SuperH DAC audio support}}");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /* Module Parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int index = SNDRV_DEFAULT_IDX1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static char *id = SNDRV_DEFAULT_STR1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) module_param(index, int, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) MODULE_PARM_DESC(index, "Index value for SuperH DAC audio.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) module_param(id, charp, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) MODULE_PARM_DESC(id, "ID string for SuperH DAC audio.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* main struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct snd_sh_dac {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct snd_card *card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct snd_pcm_substream *substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct hrtimer hrtimer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ktime_t wakeups_per_second;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int empty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) char *data_buffer, *buffer_begin, *buffer_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int processed; /* bytes proccesed, to compare with period_size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct dac_audio_pdata *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void dac_audio_start_timer(struct snd_sh_dac *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) hrtimer_start(&chip->hrtimer, chip->wakeups_per_second,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) HRTIMER_MODE_REL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static void dac_audio_stop_timer(struct snd_sh_dac *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) hrtimer_cancel(&chip->hrtimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static void dac_audio_reset(struct snd_sh_dac *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) dac_audio_stop_timer(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) chip->buffer_begin = chip->buffer_end = chip->data_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) chip->processed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) chip->empty = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static void dac_audio_set_rate(struct snd_sh_dac *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) chip->wakeups_per_second = 1000000000 / chip->rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* PCM INTERFACE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static const struct snd_pcm_hardware snd_sh_dac_pcm_hw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .info = (SNDRV_PCM_INFO_MMAP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) SNDRV_PCM_INFO_MMAP_VALID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) SNDRV_PCM_INFO_INTERLEAVED |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) SNDRV_PCM_INFO_HALF_DUPLEX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .formats = SNDRV_PCM_FMTBIT_U8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .rates = SNDRV_PCM_RATE_8000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .rate_min = 8000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .rate_max = 8000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .channels_min = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .channels_max = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .buffer_bytes_max = (48*1024),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .period_bytes_min = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .period_bytes_max = (48*1024),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .periods_min = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .periods_max = 1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static int snd_sh_dac_pcm_open(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct snd_pcm_runtime *runtime = substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) runtime->hw = snd_sh_dac_pcm_hw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) chip->substream = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) chip->buffer_begin = chip->buffer_end = chip->data_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) chip->processed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) chip->empty = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) chip->pdata->start(chip->pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int snd_sh_dac_pcm_close(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) chip->substream = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dac_audio_stop_timer(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) chip->pdata->stop(chip->pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int snd_sh_dac_pcm_prepare(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct snd_pcm_runtime *runtime = chip->substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) chip->buffer_size = runtime->buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) memset(chip->data_buffer, 0, chip->pdata->buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static int snd_sh_dac_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) case SNDRV_PCM_TRIGGER_START:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) dac_audio_start_timer(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) case SNDRV_PCM_TRIGGER_STOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) chip->buffer_begin = chip->buffer_end = chip->data_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) chip->processed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) chip->empty = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) dac_audio_stop_timer(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static int snd_sh_dac_pcm_copy(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int channel, unsigned long pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) void __user *src, unsigned long count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* channel is not used (interleaved data) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (copy_from_user_toio(chip->data_buffer + pos, src, count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) chip->buffer_end = chip->data_buffer + pos + count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (chip->empty) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) chip->empty = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) dac_audio_start_timer(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int snd_sh_dac_pcm_copy_kernel(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int channel, unsigned long pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) void *src, unsigned long count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /* channel is not used (interleaved data) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) memcpy_toio(chip->data_buffer + pos, src, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) chip->buffer_end = chip->data_buffer + pos + count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (chip->empty) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) chip->empty = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) dac_audio_start_timer(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int snd_sh_dac_pcm_silence(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) int channel, unsigned long pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) unsigned long count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /* channel is not used (interleaved data) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) memset_io(chip->data_buffer + pos, 0, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) chip->buffer_end = chip->data_buffer + pos + count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (chip->empty) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) chip->empty = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) dac_audio_start_timer(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) snd_pcm_uframes_t snd_sh_dac_pcm_pointer(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) int pointer = chip->buffer_begin - chip->data_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return pointer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* pcm ops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static const struct snd_pcm_ops snd_sh_dac_pcm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) .open = snd_sh_dac_pcm_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) .close = snd_sh_dac_pcm_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) .prepare = snd_sh_dac_pcm_prepare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) .trigger = snd_sh_dac_pcm_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) .pointer = snd_sh_dac_pcm_pointer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) .copy_user = snd_sh_dac_pcm_copy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) .copy_kernel = snd_sh_dac_pcm_copy_kernel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) .fill_silence = snd_sh_dac_pcm_silence,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) .mmap = snd_pcm_lib_mmap_iomem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int snd_sh_dac_pcm(struct snd_sh_dac *chip, int device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct snd_pcm *pcm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* device should be always 0 for us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) err = snd_pcm_new(chip->card, "SH_DAC PCM", device, 1, 0, &pcm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) pcm->private_data = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) strcpy(pcm->name, "SH_DAC PCM");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sh_dac_pcm_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /* buffer size=48K */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) NULL, 48 * 1024, 48 * 1024);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) /* END OF PCM INTERFACE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* driver .remove -- destructor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int snd_sh_dac_remove(struct platform_device *devptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) snd_card_free(platform_get_drvdata(devptr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* free -- it has been defined by create */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static int snd_sh_dac_free(struct snd_sh_dac *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /* release the data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) kfree(chip->data_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) kfree(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int snd_sh_dac_dev_free(struct snd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct snd_sh_dac *chip = device->device_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return snd_sh_dac_free(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static enum hrtimer_restart sh_dac_audio_timer(struct hrtimer *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct snd_sh_dac *chip = container_of(handle, struct snd_sh_dac,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) hrtimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct snd_pcm_runtime *runtime = chip->substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) ssize_t b_ps = frames_to_bytes(runtime, runtime->period_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (!chip->empty) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) sh_dac_output(*chip->buffer_begin, chip->pdata->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) chip->buffer_begin++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) chip->processed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (chip->processed >= b_ps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) chip->processed -= b_ps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) snd_pcm_period_elapsed(chip->substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (chip->buffer_begin == (chip->data_buffer +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) chip->buffer_size - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) chip->buffer_begin = chip->data_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (chip->buffer_begin == chip->buffer_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) chip->empty = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (!chip->empty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) hrtimer_start(&chip->hrtimer, chip->wakeups_per_second,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) HRTIMER_MODE_REL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return HRTIMER_NORESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /* create -- chip-specific constructor for the cards components */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static int snd_sh_dac_create(struct snd_card *card,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct platform_device *devptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) struct snd_sh_dac **rchip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct snd_sh_dac *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static const struct snd_device_ops ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) .dev_free = snd_sh_dac_dev_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) *rchip = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) chip = kzalloc(sizeof(*chip), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (chip == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) chip->card = card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) hrtimer_init(&chip->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) chip->hrtimer.function = sh_dac_audio_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) dac_audio_reset(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) chip->rate = 8000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) dac_audio_set_rate(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) chip->pdata = devptr->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) chip->data_buffer = kmalloc(chip->pdata->buffer_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (chip->data_buffer == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) kfree(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) snd_sh_dac_free(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) *rchip = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) /* driver .probe -- constructor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static int snd_sh_dac_probe(struct platform_device *devptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct snd_sh_dac *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct snd_card *card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) err = snd_card_new(&devptr->dev, index, id, THIS_MODULE, 0, &card);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) snd_printk(KERN_ERR "cannot allocate the card\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) err = snd_sh_dac_create(card, devptr, &chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) goto probe_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) err = snd_sh_dac_pcm(chip, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) goto probe_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) strcpy(card->driver, "snd_sh_dac");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) strcpy(card->shortname, "SuperH DAC audio driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) printk(KERN_INFO "%s %s", card->longname, card->shortname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) err = snd_card_register(card);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) goto probe_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) snd_printk(KERN_INFO "ALSA driver for SuperH DAC audio");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) platform_set_drvdata(devptr, card);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) probe_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) snd_card_free(card);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * "driver" definition
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) static struct platform_driver sh_dac_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) .probe = snd_sh_dac_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) .remove = snd_sh_dac_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) .name = "dac_audio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) module_platform_driver(sh_dac_driver);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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