/* * Copyright (C) ST-Ericsson SA 2010 * * Author: Ola Lilja , * Roger Nilsson * for ST-Ericsson. * * License terms: * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include "ux500_pcm.h" #include "ux500_msp_dai.h" static struct snd_pcm_hardware ux500_pcm_hw_playback = { .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_PAUSE, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_U16_BE, .rates = SNDRV_PCM_RATE_KNOT, .rate_min = UX500_PLATFORM_MIN_RATE_PLAYBACK, .rate_max = UX500_PLATFORM_MAX_RATE_PLAYBACK, .channels_min = UX500_PLATFORM_MIN_CHANNELS, .channels_max = UX500_PLATFORM_MAX_CHANNELS, .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX, .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN, .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX, .periods_min = UX500_PLATFORM_PERIODS_MIN, .periods_max = UX500_PLATFORM_PERIODS_MAX, }; static struct snd_pcm_hardware ux500_pcm_hw_capture = { .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_PAUSE, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_U16_BE, .rates = SNDRV_PCM_RATE_KNOT, .rate_min = UX500_PLATFORM_MIN_RATE_CAPTURE, .rate_max = UX500_PLATFORM_MAX_RATE_CAPTURE, .channels_min = UX500_PLATFORM_MIN_CHANNELS, .channels_max = UX500_PLATFORM_MAX_CHANNELS, .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX, .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN, .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX, .periods_min = UX500_PLATFORM_PERIODS_MIN, .periods_max = UX500_PLATFORM_PERIODS_MAX, }; static const char *stream_str(struct snd_pcm_substream *substream) { if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) return "Playback"; else return "Capture"; } static void ux500_pcm_dma_hw_free(struct device *dev, struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_dma_buffer *buf = runtime->dma_buffer_p; if (runtime->dma_area == NULL) return; if (buf != &substream->dma_buffer) { dma_free_coherent( buf->dev.dev, buf->bytes, buf->area, buf->addr); kfree(runtime->dma_buffer_p); } snd_pcm_set_runtime_buffer(substream, NULL); } void ux500_pcm_dma_eot_handler(void *data) { struct snd_pcm_substream *substream = data; struct snd_pcm_runtime *runtime; struct ux500_pcm_private *private; struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *dai = rtd->cpu_dai; pr_debug("%s: MSP %d (%s): Enter.\n", __func__, dai->id, stream_str(substream)); if (substream) { runtime = substream->runtime; private = substream->runtime->private_data; if (ux500_msp_dai_i2s_get_underrun_status(private->msp_id)) { private->no_of_underruns++; pr_debug("%s: Nr of underruns (%d)\n", __func__, private->no_of_underruns); } /* calc the offset in the circular buffer */ private->offset += frames_to_bytes(runtime, runtime->period_size); private->offset %= frames_to_bytes(runtime, runtime->period_size) * runtime->periods; snd_pcm_period_elapsed(substream); } } EXPORT_SYMBOL(ux500_pcm_dma_eot_handler); static int ux500_pcm_open(struct snd_pcm_substream *substream) { int stream_id = substream->pstr->stream; struct snd_pcm_runtime *runtime = substream->runtime; struct ux500_pcm_private *private; struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *dai = rtd->cpu_dai; int ret; pr_debug("%s: MSP %d (%s): Enter.\n", __func__, dai->id, stream_str(substream)); pr_debug("%s: Set runtime hwparams.\n", __func__); if (stream_id == SNDRV_PCM_STREAM_PLAYBACK) snd_soc_set_runtime_hwparams(substream, &ux500_pcm_hw_playback); else snd_soc_set_runtime_hwparams(substream, &ux500_pcm_hw_capture); /* ensure that buffer size is a multiple of period size */ ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); if (ret < 0) { pr_err("%s: Error: snd_pcm_hw_constraints failed (%d)\n", __func__, ret); return ret; } pr_debug("%s: Init runtime private data.\n", __func__); private = kzalloc(sizeof(struct ux500_pcm_private), GFP_KERNEL); if (private == NULL) return -ENOMEM; private->msp_id = dai->id; runtime->private_data = private; pr_debug("%s: Set hw-struct for %s.\n", __func__, stream_str(substream)); runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ? ux500_pcm_hw_playback : ux500_pcm_hw_capture; return 0; } static int ux500_pcm_close(struct snd_pcm_substream *substream) { struct ux500_pcm_private *private = substream->runtime->private_data; pr_debug("%s: Enter\n", __func__); kfree(private); return 0; } static int ux500_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_dma_buffer *buf = runtime->dma_buffer_p; int ret = 0; int size; pr_debug("%s: Enter\n", __func__); size = params_buffer_bytes(hw_params); if (buf) { if (buf->bytes >= size) goto out; ux500_pcm_dma_hw_free(NULL, substream); } if (substream->dma_buffer.area != NULL && substream->dma_buffer.bytes >= size) { buf = &substream->dma_buffer; } else { buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL); if (!buf) goto nomem; buf->dev.type = SNDRV_DMA_TYPE_DEV; buf->dev.dev = NULL; buf->area = dma_alloc_coherent( NULL, size, &buf->addr, GFP_KERNEL); buf->bytes = size; buf->private_data = NULL; if (!buf->area) goto free; } snd_pcm_set_runtime_buffer(substream, buf); ret = 1; out: runtime->dma_bytes = size; return ret; free: kfree(buf); nomem: return -ENOMEM; } static int ux500_pcm_hw_free(struct snd_pcm_substream *substream) { pr_debug("%s: Enter\n", __func__); ux500_pcm_dma_hw_free(NULL, substream); return 0; } static int ux500_pcm_prepare(struct snd_pcm_substream *substream) { pr_debug("%s: Enter\n", __func__); return 0; } static int ux500_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { int ret; struct snd_pcm_runtime *runtime = substream->runtime; struct ux500_pcm_private *private = runtime->private_data; int stream_id = substream->pstr->stream; pr_debug("%s: Enter\n", __func__); switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: pr_debug("%s: START/PAUSE-RELEASE\n", __func__); if (runtime->status->state == SNDRV_PCM_STATE_XRUN) { pr_debug("XRUN occurred\n"); return 0; } private->no_of_underruns = 0; private->offset = 0; ret = ux500_msp_dai_i2s_configure_sg(runtime->dma_addr, runtime->periods, frames_to_bytes(runtime, runtime->period_size), private->msp_id, stream_id); if (ret) { pr_err("%s: Failed to configure sg-list!\n", __func__); return -EINVAL; } break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: break; case SNDRV_PCM_TRIGGER_STOP: pr_debug("%s: SNDRV_PCM_TRIGGER_STOP\n", __func__); pr_debug("%s: no_of_underruns = %u\n", __func__, private->no_of_underruns); break; default: pr_err("%s: Invalid command in pcm trigger\n", __func__); return -EINVAL; } return 0; } static snd_pcm_uframes_t ux500_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct ux500_pcm_private *private = runtime->private_data; pr_debug("%s: dma_offset %d frame %ld\n", __func__, private->offset, bytes_to_frames(substream->runtime, private->offset)); return bytes_to_frames(substream->runtime, private->offset); } static int ux500_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma) { struct snd_pcm_runtime *runtime = substream->runtime; pr_debug("%s: Enter.\n", __func__); return dma_mmap_coherent( NULL, vma, runtime->dma_area, runtime->dma_addr, runtime->dma_bytes); } static struct snd_pcm_ops ux500_pcm_ops = { .open = ux500_pcm_open, .close = ux500_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = ux500_pcm_hw_params, .hw_free = ux500_pcm_hw_free, .prepare = ux500_pcm_prepare, .trigger = ux500_pcm_trigger, .pointer = ux500_pcm_pointer, .mmap = ux500_pcm_mmap }; int ux500_pcm_new(struct snd_soc_pcm_runtime *rtd) { struct snd_pcm *pcm = rtd->pcm; pr_debug("%s: pcm = %d\n", __func__, (int)pcm); pcm->info_flags = 0; strcpy(pcm->name, "UX500_PCM"); pr_debug("%s: pcm->name = %s.\n", __func__, pcm->name); return 0; } static void ux500_pcm_free(struct snd_pcm *pcm) { pr_debug("%s: Enter\n", __func__); } static int ux500_pcm_suspend(struct snd_soc_dai *dai) { pr_debug("%s: Enter\n", __func__); return 0; } static int ux500_pcm_resume(struct snd_soc_dai *dai) { pr_debug("%s: Enter\n", __func__); return 0; } struct snd_soc_platform_driver ux500_pcm_soc_drv = { .ops = &ux500_pcm_ops, .pcm_new = ux500_pcm_new, .pcm_free = ux500_pcm_free, .suspend = ux500_pcm_suspend, .resume = ux500_pcm_resume, }; EXPORT_SYMBOL(ux500_pcm_soc_drv); static int __devexit ux500_pcm_drv_probe(struct platform_device *pdev) { int ret; pr_info("%s: Register ux500-pcm SoC platform driver.\n", __func__); ret = snd_soc_register_platform(&pdev->dev, &ux500_pcm_soc_drv); if (ret < 0) { pr_err("%s: Error: Failed to register " "ux500-pcm SoC platform driver (%d)!\n", __func__, ret); return ret; } return 0; } static int __devinit ux500_pcm_drv_remove(struct platform_device *pdev) { pr_info("%s: Unregister ux500-pcm SoC platform driver.\n", __func__); snd_soc_unregister_platform(&pdev->dev); return 0; } static struct platform_driver ux500_pcm_driver = { .driver = { .name = "ux500-pcm", .owner = THIS_MODULE, }, .probe = ux500_pcm_drv_probe, .remove = __devexit_p(ux500_pcm_drv_remove), }; static int __init ux500_pcm_drv_init(void) { pr_debug("%s: Register ux500-pcm platform driver.\n", __func__); return platform_driver_register(&ux500_pcm_driver); } static void __exit ux500_pcm_drv_exit(void) { pr_debug("%s: Unregister ux500-pcm platform driver.\n", __func__); platform_driver_unregister(&ux500_pcm_driver); } module_init(ux500_pcm_drv_init); module_exit(ux500_pcm_drv_exit); MODULE_LICENSE("GPL");