From 84bc278b1f04920e867e4b46e094bcc066393d41 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Tue, 29 Jul 2008 11:42:28 +0100 Subject: ALSA: ASoC: Add OpenFirmware helper for matching bus and codec drivers Simple utility layer for creating ASoC machine instances based on data in the OpenFirmware device tree. OF aware platform drivers and codec drivers register themselves with this framework and the framework automatically instantiates a machine driver. At the moment, the driver is not very capable and it is expected to be extended as more features are needed for specifying the configuration in the device tree. This is most likely temporary glue code to work around limitations in the ASoC v1 framework. When v2 is merged, most of this driver will need to be reworked. Signed-off-by: Grant Likely Signed-off-by: Mark Brown Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/soc/fsl/Kconfig | 3 + sound/soc/fsl/Makefile | 3 + sound/soc/fsl/soc-of-simple.c | 171 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 177 insertions(+) create mode 100644 sound/soc/fsl/soc-of-simple.c (limited to 'sound/soc/fsl') diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig index 3368ace..398f002 100644 --- a/sound/soc/fsl/Kconfig +++ b/sound/soc/fsl/Kconfig @@ -1,3 +1,6 @@ +config SND_SOC_OF_SIMPLE + tristate + config SND_SOC_MPC8610 bool "ALSA SoC support for the MPC8610 SOC" depends on MPC8610_HPCD diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile index 62f680a..aa2100b 100644 --- a/sound/soc/fsl/Makefile +++ b/sound/soc/fsl/Makefile @@ -1,3 +1,6 @@ +# Simple machine driver that extracts configuration from the OF device tree +obj-$(CONFIG_SND_SOC_OF_SIMPLE) += soc-of-simple.o + # MPC8610 HPCD Machine Support obj-$(CONFIG_SND_SOC_MPC8610_HPCD) += mpc8610_hpcd.o diff --git a/sound/soc/fsl/soc-of-simple.c b/sound/soc/fsl/soc-of-simple.c new file mode 100644 index 0000000..0382fda --- /dev/null +++ b/sound/soc/fsl/soc-of-simple.c @@ -0,0 +1,171 @@ +/* + * OF helpers for ALSA SoC Layer + * + * Copyright (C) 2008, Secret Lab Technologies Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Grant Likely "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("ALSA SoC OpenFirmware bindings"); + +static DEFINE_MUTEX(of_snd_soc_mutex); +static LIST_HEAD(of_snd_soc_device_list); +static int of_snd_soc_next_index; + +struct of_snd_soc_device { + int id; + struct list_head list; + struct snd_soc_device device; + struct snd_soc_machine machine; + struct snd_soc_dai_link dai_link; + struct platform_device *pdev; + struct device_node *platform_node; + struct device_node *codec_node; +}; + +static struct snd_soc_ops of_snd_soc_ops = { +}; + +static struct of_snd_soc_device * +of_snd_soc_get_device(struct device_node *codec_node) +{ + struct of_snd_soc_device *of_soc; + + list_for_each_entry(of_soc, &of_snd_soc_device_list, list) { + if (of_soc->codec_node == codec_node) + return of_soc; + } + + of_soc = kzalloc(sizeof(struct of_snd_soc_device), GFP_KERNEL); + if (!of_soc) + return NULL; + + /* Initialize the structure and add it to the global list */ + of_soc->codec_node = codec_node; + of_soc->id = of_snd_soc_next_index++; + of_soc->machine.dai_link = &of_soc->dai_link; + of_soc->machine.num_links = 1; + of_soc->device.machine = &of_soc->machine; + of_soc->dai_link.ops = &of_snd_soc_ops; + list_add(&of_soc->list, &of_snd_soc_device_list); + + return of_soc; +} + +static void of_snd_soc_register_device(struct of_snd_soc_device *of_soc) +{ + struct platform_device *pdev; + int rc; + + /* Only register the device if both the codec and platform have + * been registered */ + if ((!of_soc->device.codec_data) || (!of_soc->platform_node)) + return; + + pr_info("platform<-->codec match achieved; registering machine\n"); + + pdev = platform_device_alloc("soc-audio", of_soc->id); + if (!pdev) { + pr_err("of_soc: platform_device_alloc() failed\n"); + return; + } + + pdev->dev.platform_data = of_soc; + platform_set_drvdata(pdev, &of_soc->device); + of_soc->device.dev = &pdev->dev; + + /* The ASoC device is complete; register it */ + rc = platform_device_add(pdev); + if (rc) { + pr_err("of_soc: platform_device_add() failed\n"); + return; + } + +} + +int of_snd_soc_register_codec(struct snd_soc_codec_device *codec_dev, + void *codec_data, struct snd_soc_dai *dai, + struct device_node *node) +{ + struct of_snd_soc_device *of_soc; + int rc = 0; + + pr_info("registering ASoC codec driver: %s\n", node->full_name); + + mutex_lock(&of_snd_soc_mutex); + of_soc = of_snd_soc_get_device(node); + if (!of_soc) { + rc = -ENOMEM; + goto out; + } + + /* Store the codec data */ + of_soc->device.codec_data = codec_data; + of_soc->device.codec_dev = codec_dev; + of_soc->dai_link.name = (char *)node->name; + of_soc->dai_link.stream_name = (char *)node->name; + of_soc->dai_link.codec_dai = dai; + + /* Now try to register the SoC device */ + of_snd_soc_register_device(of_soc); + + out: + mutex_unlock(&of_snd_soc_mutex); + return rc; +} +EXPORT_SYMBOL_GPL(of_snd_soc_register_codec); + +int of_snd_soc_register_platform(struct snd_soc_platform *platform, + struct device_node *node, + struct snd_soc_dai *cpu_dai) +{ + struct of_snd_soc_device *of_soc; + struct device_node *codec_node; + const phandle *handle; + int len, rc = 0; + + pr_info("registering ASoC platform driver: %s\n", node->full_name); + + handle = of_get_property(node, "codec-handle", &len); + if (!handle || len < sizeof(handle)) + return -ENODEV; + codec_node = of_find_node_by_phandle(*handle); + if (!codec_node) + return -ENODEV; + pr_info("looking for codec: %s\n", codec_node->full_name); + + mutex_lock(&of_snd_soc_mutex); + of_soc = of_snd_soc_get_device(codec_node); + if (!of_soc) { + rc = -ENOMEM; + goto out; + } + + of_soc->platform_node = node; + of_soc->dai_link.cpu_dai = cpu_dai; + of_soc->device.platform = platform; + of_soc->machine.name = of_soc->dai_link.cpu_dai->name; + + /* Now try to register the SoC device */ + of_snd_soc_register_device(of_soc); + + out: + mutex_unlock(&of_snd_soc_mutex); + return rc; +} +EXPORT_SYMBOL_GPL(of_snd_soc_register_platform); -- cgit v1.1 From dc641378b5ee220aa29ed8b8f51b7af9a19a7719 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Tue, 29 Jul 2008 11:42:30 +0100 Subject: ALSA: ASoC: Add mpc5200-psc I2S driver This is an I2S bus driver for the MPC5200 PSC device. It depends on the soc-of helper functions to match a PSC device with a codec based on data in the device tree. Signed-off-by: Grant Likely Signed-off-by: Mark Brown Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/soc/fsl/Kconfig | 7 + sound/soc/fsl/Makefile | 2 + sound/soc/fsl/mpc5200_psc_i2s.c | 884 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 893 insertions(+) create mode 100644 sound/soc/fsl/mpc5200_psc_i2s.c (limited to 'sound/soc/fsl') diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig index 398f002..bba9546 100644 --- a/sound/soc/fsl/Kconfig +++ b/sound/soc/fsl/Kconfig @@ -17,3 +17,10 @@ config SND_SOC_MPC8610_HPCD default y if MPC8610_HPCD help Say Y if you want to enable audio on the Freescale MPC8610 HPCD. + +config SND_SOC_MPC5200_I2S + tristate "Freescale MPC5200 PSC in I2S mode driver" + select SND_SOC_OF_SIMPLE + depends on SND_SOC && PPC_MPC52xx + help + Say Y here to support the MPC5200 PSCs in I2S mode. diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile index aa2100b..035da4a 100644 --- a/sound/soc/fsl/Makefile +++ b/sound/soc/fsl/Makefile @@ -7,3 +7,5 @@ obj-$(CONFIG_SND_SOC_MPC8610_HPCD) += mpc8610_hpcd.o # MPC8610 Platform Support obj-$(CONFIG_SND_SOC_MPC8610) += fsl_ssi.o fsl_dma.o +obj-$(CONFIG_SND_SOC_MPC5200_I2S) += mpc5200_psc_i2s.o + diff --git a/sound/soc/fsl/mpc5200_psc_i2s.c b/sound/soc/fsl/mpc5200_psc_i2s.c new file mode 100644 index 0000000..8692329 --- /dev/null +++ b/sound/soc/fsl/mpc5200_psc_i2s.c @@ -0,0 +1,884 @@ +/* + * Freescale MPC5200 PSC in I2S mode + * ALSA SoC Digital Audio Interface (DAI) driver + * + * Copyright (C) 2008 Secret Lab Technologies Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +MODULE_AUTHOR("Grant Likely "); +MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver"); +MODULE_LICENSE("GPL"); + +/** + * PSC_I2S_RATES: sample rates supported by the I2S + * + * This driver currently only supports the PSC running in I2S slave mode, + * which means the codec determines the sample rate. Therefore, we tell + * ALSA that we support all rates and let the codec driver decide what rates + * are really supported. + */ +#define PSC_I2S_RATES (SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_192000 | \ + SNDRV_PCM_RATE_CONTINUOUS) + +/** + * PSC_I2S_FORMATS: audio formats supported by the PSC I2S mode + */ +#define PSC_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \ + SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S24_BE | \ + SNDRV_PCM_FMTBIT_S32_BE) + +/** + * psc_i2s_stream - Data specific to a single stream (playback or capture) + * @active: flag indicating if the stream is active + * @psc_i2s: pointer back to parent psc_i2s data structure + * @bcom_task: bestcomm task structure + * @irq: irq number for bestcomm task + * @period_start: physical address of start of DMA region + * @period_end: physical address of end of DMA region + * @period_next_pt: physical address of next DMA buffer to enqueue + * @period_bytes: size of DMA period in bytes + */ +struct psc_i2s_stream { + int active; + struct psc_i2s *psc_i2s; + struct bcom_task *bcom_task; + int irq; + struct snd_pcm_substream *stream; + dma_addr_t period_start; + dma_addr_t period_end; + dma_addr_t period_next_pt; + dma_addr_t period_current_pt; + int period_bytes; +}; + +/** + * psc_i2s - Private driver data + * @name: short name for this device ("PSC0", "PSC1", etc) + * @psc_regs: pointer to the PSC's registers + * @fifo_regs: pointer to the PSC's FIFO registers + * @irq: IRQ of this PSC + * @dev: struct device pointer + * @dai: the CPU DAI for this device + * @sicr: Base value used in serial interface control register; mode is ORed + * with this value. + * @playback: Playback stream context data + * @capture: Capture stream context data + */ +struct psc_i2s { + char name[32]; + struct mpc52xx_psc __iomem *psc_regs; + struct mpc52xx_psc_fifo __iomem *fifo_regs; + unsigned int irq; + struct device *dev; + struct snd_soc_dai dai; + spinlock_t lock; + u32 sicr; + + /* per-stream data */ + struct psc_i2s_stream playback; + struct psc_i2s_stream capture; + + /* Statistics */ + struct { + int overrun_count; + int underrun_count; + } stats; +}; + +/* + * Interrupt handlers + */ +static irqreturn_t psc_i2s_status_irq(int irq, void *_psc_i2s) +{ + struct psc_i2s *psc_i2s = _psc_i2s; + struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs; + u16 isr; + + isr = in_be16(®s->mpc52xx_psc_isr); + + /* Playback underrun error */ + if (psc_i2s->playback.active && (isr & MPC52xx_PSC_IMR_TXEMP)) + psc_i2s->stats.underrun_count++; + + /* Capture overrun error */ + if (psc_i2s->capture.active && (isr & MPC52xx_PSC_IMR_ORERR)) + psc_i2s->stats.overrun_count++; + + out_8(®s->command, 4 << 4); /* reset the error status */ + + return IRQ_HANDLED; +} + +/** + * psc_i2s_bcom_enqueue_next_buffer - Enqueue another audio buffer + * @s: pointer to stream private data structure + * + * Enqueues another audio period buffer into the bestcomm queue. + * + * Note: The routine must only be called when there is space available in + * the queue. Otherwise the enqueue will fail and the audio ring buffer + * will get out of sync + */ +static void psc_i2s_bcom_enqueue_next_buffer(struct psc_i2s_stream *s) +{ + struct bcom_bd *bd; + + /* Prepare and enqueue the next buffer descriptor */ + bd = bcom_prepare_next_buffer(s->bcom_task); + bd->status = s->period_bytes; + bd->data[0] = s->period_next_pt; + bcom_submit_next_buffer(s->bcom_task, NULL); + + /* Update for next period */ + s->period_next_pt += s->period_bytes; + if (s->period_next_pt >= s->period_end) + s->period_next_pt = s->period_start; +} + +/* Bestcomm DMA irq handler */ +static irqreturn_t psc_i2s_bcom_irq(int irq, void *_psc_i2s_stream) +{ + struct psc_i2s_stream *s = _psc_i2s_stream; + + /* For each finished period, dequeue the completed period buffer + * and enqueue a new one in it's place. */ + while (bcom_buffer_done(s->bcom_task)) { + bcom_retrieve_buffer(s->bcom_task, NULL, NULL); + s->period_current_pt += s->period_bytes; + if (s->period_current_pt >= s->period_end) + s->period_current_pt = s->period_start; + psc_i2s_bcom_enqueue_next_buffer(s); + bcom_enable(s->bcom_task); + } + + /* If the stream is active, then also inform the PCM middle layer + * of the period finished event. */ + if (s->active) + snd_pcm_period_elapsed(s->stream); + + return IRQ_HANDLED; +} + +/** + * psc_i2s_startup: create a new substream + * + * This is the first function called when a stream is opened. + * + * If this is the first stream open, then grab the IRQ and program most of + * the PSC registers. + */ +static int psc_i2s_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data; + int rc; + + dev_dbg(psc_i2s->dev, "psc_i2s_startup(substream=%p)\n", substream); + + if (!psc_i2s->playback.active && + !psc_i2s->capture.active) { + /* Setup the IRQs */ + rc = request_irq(psc_i2s->irq, &psc_i2s_status_irq, IRQF_SHARED, + "psc-i2s-status", psc_i2s); + rc |= request_irq(psc_i2s->capture.irq, + &psc_i2s_bcom_irq, IRQF_SHARED, + "psc-i2s-capture", &psc_i2s->capture); + rc |= request_irq(psc_i2s->playback.irq, + &psc_i2s_bcom_irq, IRQF_SHARED, + "psc-i2s-playback", &psc_i2s->playback); + if (rc) { + free_irq(psc_i2s->irq, psc_i2s); + free_irq(psc_i2s->capture.irq, + &psc_i2s->capture); + free_irq(psc_i2s->playback.irq, + &psc_i2s->playback); + return -ENODEV; + } + } + + return 0; +} + +static int psc_i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data; + u32 mode; + + dev_dbg(psc_i2s->dev, "%s(substream=%p) p_size=%i p_bytes=%i" + " periods=%i buffer_size=%i buffer_bytes=%i\n", + __func__, substream, params_period_size(params), + params_period_bytes(params), params_periods(params), + params_buffer_size(params), params_buffer_bytes(params)); + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S8: + mode = MPC52xx_PSC_SICR_SIM_CODEC_8; + break; + case SNDRV_PCM_FORMAT_S16_BE: + mode = MPC52xx_PSC_SICR_SIM_CODEC_16; + break; + case SNDRV_PCM_FORMAT_S24_BE: + mode = MPC52xx_PSC_SICR_SIM_CODEC_24; + break; + case SNDRV_PCM_FORMAT_S32_BE: + mode = MPC52xx_PSC_SICR_SIM_CODEC_32; + break; + default: + dev_dbg(psc_i2s->dev, "invalid format\n"); + return -EINVAL; + } + out_be32(&psc_i2s->psc_regs->sicr, psc_i2s->sicr | mode); + + snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); + + return 0; +} + +static int psc_i2s_hw_free(struct snd_pcm_substream *substream) +{ + snd_pcm_set_runtime_buffer(substream, NULL); + return 0; +} + +/** + * psc_i2s_trigger: start and stop the DMA transfer. + * + * This function is called by ALSA to start, stop, pause, and resume the DMA + * transfer of data. + */ +static int psc_i2s_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data; + struct snd_pcm_runtime *runtime = substream->runtime; + struct psc_i2s_stream *s; + struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs; + u16 imr; + u8 psc_cmd; + long flags; + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + s = &psc_i2s->capture; + else + s = &psc_i2s->playback; + + dev_dbg(psc_i2s->dev, "psc_i2s_trigger(substream=%p, cmd=%i)" + " stream_id=%i\n", + substream, cmd, substream->pstr->stream); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + s->period_bytes = frames_to_bytes(runtime, + runtime->period_size); + s->period_start = virt_to_phys(runtime->dma_area); + s->period_end = s->period_start + + (s->period_bytes * runtime->periods); + s->period_next_pt = s->period_start; + s->period_current_pt = s->period_start; + s->active = 1; + + /* First; reset everything */ + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) { + out_8(®s->command, MPC52xx_PSC_RST_RX); + out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); + } else { + out_8(®s->command, MPC52xx_PSC_RST_TX); + out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); + } + + /* Next, fill up the bestcomm bd queue and enable DMA. + * This will begin filling the PSC's fifo. */ + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + bcom_gen_bd_rx_reset(s->bcom_task); + else + bcom_gen_bd_tx_reset(s->bcom_task); + while (!bcom_queue_full(s->bcom_task)) + psc_i2s_bcom_enqueue_next_buffer(s); + bcom_enable(s->bcom_task); + + /* Due to errata in the i2s mode; need to line up enabling + * the transmitter with a transition on the frame sync + * line */ + + spin_lock_irqsave(&psc_i2s->lock, flags); + /* first make sure it is low */ + while ((in_8(®s->ipcr_acr.ipcr) & 0x80) != 0) + ; + /* then wait for the transition to high */ + while ((in_8(®s->ipcr_acr.ipcr) & 0x80) == 0) + ; + /* Finally, enable the PSC. + * Receiver must always be enabled; even when we only want + * transmit. (see 15.3.2.3 of MPC5200B User's Guide) */ + psc_cmd = MPC52xx_PSC_RX_ENABLE; + if (substream->pstr->stream == SNDRV_PCM_STREAM_PLAYBACK) + psc_cmd |= MPC52xx_PSC_TX_ENABLE; + out_8(®s->command, psc_cmd); + spin_unlock_irqrestore(&psc_i2s->lock, flags); + + break; + + case SNDRV_PCM_TRIGGER_STOP: + /* Turn off the PSC */ + s->active = 0; + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) { + if (!psc_i2s->playback.active) { + out_8(®s->command, 2 << 4); /* reset rx */ + out_8(®s->command, 3 << 4); /* reset tx */ + out_8(®s->command, 4 << 4); /* reset err */ + } + } else { + out_8(®s->command, 3 << 4); /* reset tx */ + out_8(®s->command, 4 << 4); /* reset err */ + if (!psc_i2s->capture.active) + out_8(®s->command, 2 << 4); /* reset rx */ + } + + bcom_disable(s->bcom_task); + while (!bcom_queue_empty(s->bcom_task)) + bcom_retrieve_buffer(s->bcom_task, NULL, NULL); + + break; + + default: + dev_dbg(psc_i2s->dev, "invalid command\n"); + return -EINVAL; + } + + /* Update interrupt enable settings */ + imr = 0; + if (psc_i2s->playback.active) + imr |= MPC52xx_PSC_IMR_TXEMP; + if (psc_i2s->capture.active) + imr |= MPC52xx_PSC_IMR_ORERR; + out_be16(®s->isr_imr.imr, imr); + + return 0; +} + +/** + * psc_i2s_shutdown: shutdown the data transfer on a stream + * + * Shutdown the PSC if there are no other substreams open. + */ +static void psc_i2s_shutdown(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data; + + dev_dbg(psc_i2s->dev, "psc_i2s_shutdown(substream=%p)\n", substream); + + /* + * If this is the last active substream, disable the PSC and release + * the IRQ. + */ + if (!psc_i2s->playback.active && + !psc_i2s->capture.active) { + + /* Disable all interrupts and reset the PSC */ + out_be16(&psc_i2s->psc_regs->isr_imr.imr, 0); + out_8(&psc_i2s->psc_regs->command, 3 << 4); /* reset tx */ + out_8(&psc_i2s->psc_regs->command, 2 << 4); /* reset rx */ + out_8(&psc_i2s->psc_regs->command, 1 << 4); /* reset mode */ + out_8(&psc_i2s->psc_regs->command, 4 << 4); /* reset error */ + + /* Release irqs */ + free_irq(psc_i2s->irq, psc_i2s); + free_irq(psc_i2s->capture.irq, &psc_i2s->capture); + free_irq(psc_i2s->playback.irq, &psc_i2s->playback); + } +} + +/** + * psc_i2s_set_sysclk: set the clock frequency and direction + * + * This function is called by the machine driver to tell us what the clock + * frequency and direction are. + * + * Currently, we only support operating as a clock slave (SND_SOC_CLOCK_IN), + * and we don't care about the frequency. Return an error if the direction + * is not SND_SOC_CLOCK_IN. + * + * @clk_id: reserved, should be zero + * @freq: the frequency of the given clock ID, currently ignored + * @dir: SND_SOC_CLOCK_IN (clock slave) or SND_SOC_CLOCK_OUT (clock master) + */ +static int psc_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, + int clk_id, unsigned int freq, int dir) +{ + struct psc_i2s *psc_i2s = cpu_dai->private_data; + dev_dbg(psc_i2s->dev, "psc_i2s_set_sysclk(cpu_dai=%p, dir=%i)\n", + cpu_dai, dir); + return (dir == SND_SOC_CLOCK_IN) ? 0 : -EINVAL; +} + +/** + * psc_i2s_set_fmt: set the serial format. + * + * This function is called by the machine driver to tell us what serial + * format to use. + * + * This driver only supports I2S mode. Return an error if the format is + * not SND_SOC_DAIFMT_I2S. + * + * @format: one of SND_SOC_DAIFMT_xxx + */ +static int psc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format) +{ + struct psc_i2s *psc_i2s = cpu_dai->private_data; + dev_dbg(psc_i2s->dev, "psc_i2s_set_fmt(cpu_dai=%p, format=%i)\n", + cpu_dai, format); + return (format == SND_SOC_DAIFMT_I2S) ? 0 : -EINVAL; +} + +/* --------------------------------------------------------------------- + * ALSA SoC Bindings + * + * - Digital Audio Interface (DAI) template + * - create/destroy dai hooks + */ + +/** + * psc_i2s_dai_template: template CPU Digital Audio Interface + */ +static struct snd_soc_dai psc_i2s_dai_template = { + .type = SND_SOC_DAI_I2S, + .playback = { + .channels_min = 2, + .channels_max = 2, + .rates = PSC_I2S_RATES, + .formats = PSC_I2S_FORMATS, + }, + .capture = { + .channels_min = 2, + .channels_max = 2, + .rates = PSC_I2S_RATES, + .formats = PSC_I2S_FORMATS, + }, + .ops = { + .startup = psc_i2s_startup, + .hw_params = psc_i2s_hw_params, + .hw_free = psc_i2s_hw_free, + .shutdown = psc_i2s_shutdown, + .trigger = psc_i2s_trigger, + }, + .dai_ops = { + .set_sysclk = psc_i2s_set_sysclk, + .set_fmt = psc_i2s_set_fmt, + }, +}; + +/* --------------------------------------------------------------------- + * The PSC I2S 'ASoC platform' driver + * + * Can be referenced by an 'ASoC machine' driver + * This driver only deals with the audio bus; it doesn't have any + * interaction with the attached codec + */ + +static const struct snd_pcm_hardware psc_i2s_pcm_hardware = { + .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER, + .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE, + .rate_min = 8000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .period_bytes_max = 1024 * 1024, + .period_bytes_min = 32, + .periods_min = 2, + .periods_max = 256, + .buffer_bytes_max = 2 * 1024 * 1024, + .fifo_size = 0, +}; + +static int psc_i2s_pcm_open(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data; + struct psc_i2s_stream *s; + + dev_dbg(psc_i2s->dev, "psc_i2s_pcm_open(substream=%p)\n", substream); + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + s = &psc_i2s->capture; + else + s = &psc_i2s->playback; + + snd_soc_set_runtime_hwparams(substream, &psc_i2s_pcm_hardware); + + s->stream = substream; + return 0; +} + +static int psc_i2s_pcm_close(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data; + struct psc_i2s_stream *s; + + dev_dbg(psc_i2s->dev, "psc_i2s_pcm_close(substream=%p)\n", substream); + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + s = &psc_i2s->capture; + else + s = &psc_i2s->playback; + + s->stream = NULL; + return 0; +} + +static snd_pcm_uframes_t +psc_i2s_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data; + struct psc_i2s_stream *s; + dma_addr_t count; + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + s = &psc_i2s->capture; + else + s = &psc_i2s->playback; + + count = s->period_current_pt - s->period_start; + + return bytes_to_frames(substream->runtime, count); +} + +static struct snd_pcm_ops psc_i2s_pcm_ops = { + .open = psc_i2s_pcm_open, + .close = psc_i2s_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .pointer = psc_i2s_pcm_pointer, +}; + +static u64 psc_i2s_pcm_dmamask = 0xffffffff; +static int psc_i2s_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, + struct snd_pcm *pcm) +{ + struct snd_soc_pcm_runtime *rtd = pcm->private_data; + size_t size = psc_i2s_pcm_hardware.buffer_bytes_max; + int rc = 0; + + dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_new(card=%p, dai=%p, pcm=%p)\n", + card, dai, pcm); + + if (!card->dev->dma_mask) + card->dev->dma_mask = &psc_i2s_pcm_dmamask; + if (!card->dev->coherent_dma_mask) + card->dev->coherent_dma_mask = 0xffffffff; + + if (pcm->streams[0].substream) { + rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size, + &pcm->streams[0].substream->dma_buffer); + if (rc) + goto playback_alloc_err; + } + + if (pcm->streams[1].substream) { + rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size, + &pcm->streams[1].substream->dma_buffer); + if (rc) + goto capture_alloc_err; + } + + return 0; + + capture_alloc_err: + if (pcm->streams[0].substream) + snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer); + playback_alloc_err: + dev_err(card->dev, "Cannot allocate buffer(s)\n"); + return -ENOMEM; +} + +static void psc_i2s_pcm_free(struct snd_pcm *pcm) +{ + struct snd_soc_pcm_runtime *rtd = pcm->private_data; + struct snd_pcm_substream *substream; + int stream; + + dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_free(pcm=%p)\n", pcm); + + for (stream = 0; stream < 2; stream++) { + substream = pcm->streams[stream].substream; + if (substream) { + snd_dma_free_pages(&substream->dma_buffer); + substream->dma_buffer.area = NULL; + substream->dma_buffer.addr = 0; + } + } +} + +struct snd_soc_platform psc_i2s_pcm_soc_platform = { + .name = "mpc5200-psc-audio", + .pcm_ops = &psc_i2s_pcm_ops, + .pcm_new = &psc_i2s_pcm_new, + .pcm_free = &psc_i2s_pcm_free, +}; + +/* --------------------------------------------------------------------- + * Sysfs attributes for debugging + */ + +static ssize_t psc_i2s_status_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct psc_i2s *psc_i2s = dev_get_drvdata(dev); + + return sprintf(buf, "status=%.4x sicr=%.8x rfnum=%i rfstat=0x%.4x " + "tfnum=%i tfstat=0x%.4x\n", + in_be16(&psc_i2s->psc_regs->sr_csr.status), + in_be32(&psc_i2s->psc_regs->sicr), + in_be16(&psc_i2s->fifo_regs->rfnum) & 0x1ff, + in_be16(&psc_i2s->fifo_regs->rfstat), + in_be16(&psc_i2s->fifo_regs->tfnum) & 0x1ff, + in_be16(&psc_i2s->fifo_regs->tfstat)); +} + +static int *psc_i2s_get_stat_attr(struct psc_i2s *psc_i2s, const char *name) +{ + if (strcmp(name, "playback_underrun") == 0) + return &psc_i2s->stats.underrun_count; + if (strcmp(name, "capture_overrun") == 0) + return &psc_i2s->stats.overrun_count; + + return NULL; +} + +static ssize_t psc_i2s_stat_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct psc_i2s *psc_i2s = dev_get_drvdata(dev); + int *attrib; + + attrib = psc_i2s_get_stat_attr(psc_i2s, attr->attr.name); + if (!attrib) + return 0; + + return sprintf(buf, "%i\n", *attrib); +} + +static ssize_t psc_i2s_stat_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct psc_i2s *psc_i2s = dev_get_drvdata(dev); + int *attrib; + + attrib = psc_i2s_get_stat_attr(psc_i2s, attr->attr.name); + if (!attrib) + return 0; + + *attrib = simple_strtoul(buf, NULL, 0); + return count; +} + +DEVICE_ATTR(status, 0644, psc_i2s_status_show, NULL); +DEVICE_ATTR(playback_underrun, 0644, psc_i2s_stat_show, psc_i2s_stat_store); +DEVICE_ATTR(capture_overrun, 0644, psc_i2s_stat_show, psc_i2s_stat_store); + +/* --------------------------------------------------------------------- + * OF platform bus binding code: + * - Probe/remove operations + * - OF device match table + */ +static int __devinit psc_i2s_of_probe(struct of_device *op, + const struct of_device_id *match) +{ + phys_addr_t fifo; + struct psc_i2s *psc_i2s; + struct resource res; + int size, psc_id, irq, rc; + const __be32 *prop; + void __iomem *regs; + + dev_dbg(&op->dev, "probing psc i2s device\n"); + + /* Get the PSC ID */ + prop = of_get_property(op->node, "cell-index", &size); + if (!prop || size < sizeof *prop) + return -ENODEV; + psc_id = be32_to_cpu(*prop); + + /* Fetch the registers and IRQ of the PSC */ + irq = irq_of_parse_and_map(op->node, 0); + if (of_address_to_resource(op->node, 0, &res)) { + dev_err(&op->dev, "Missing reg property\n"); + return -ENODEV; + } + regs = ioremap(res.start, 1 + res.end - res.start); + if (!regs) { + dev_err(&op->dev, "Could not map registers\n"); + return -ENODEV; + } + + /* Allocate and initialize the driver private data */ + psc_i2s = kzalloc(sizeof *psc_i2s, GFP_KERNEL); + if (!psc_i2s) { + iounmap(regs); + return -ENOMEM; + } + spin_lock_init(&psc_i2s->lock); + psc_i2s->irq = irq; + psc_i2s->psc_regs = regs; + psc_i2s->fifo_regs = regs + sizeof *psc_i2s->psc_regs; + psc_i2s->dev = &op->dev; + psc_i2s->playback.psc_i2s = psc_i2s; + psc_i2s->capture.psc_i2s = psc_i2s; + snprintf(psc_i2s->name, sizeof psc_i2s->name, "PSC%u", psc_id+1); + + /* Fill out the CPU DAI structure */ + memcpy(&psc_i2s->dai, &psc_i2s_dai_template, sizeof psc_i2s->dai); + psc_i2s->dai.private_data = psc_i2s; + psc_i2s->dai.name = psc_i2s->name; + psc_i2s->dai.id = psc_id; + + /* Find the address of the fifo data registers and setup the + * DMA tasks */ + fifo = res.start + offsetof(struct mpc52xx_psc, buffer.buffer_32); + psc_i2s->capture.bcom_task = + bcom_psc_gen_bd_rx_init(psc_id, 10, fifo, 512); + psc_i2s->playback.bcom_task = + bcom_psc_gen_bd_tx_init(psc_id, 10, fifo); + if (!psc_i2s->capture.bcom_task || + !psc_i2s->playback.bcom_task) { + dev_err(&op->dev, "Could not allocate bestcomm tasks\n"); + iounmap(regs); + kfree(psc_i2s); + return -ENODEV; + } + + /* Disable all interrupts and reset the PSC */ + out_be16(&psc_i2s->psc_regs->isr_imr.imr, 0); + out_8(&psc_i2s->psc_regs->command, 3 << 4); /* reset transmitter */ + out_8(&psc_i2s->psc_regs->command, 2 << 4); /* reset receiver */ + out_8(&psc_i2s->psc_regs->command, 1 << 4); /* reset mode */ + out_8(&psc_i2s->psc_regs->command, 4 << 4); /* reset error */ + + /* Configure the serial interface mode; defaulting to CODEC8 mode */ + psc_i2s->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S | + MPC52xx_PSC_SICR_CLKPOL; + if (of_get_property(op->node, "fsl,cellslave", NULL)) + psc_i2s->sicr |= MPC52xx_PSC_SICR_CELLSLAVE | + MPC52xx_PSC_SICR_GENCLK; + out_be32(&psc_i2s->psc_regs->sicr, + psc_i2s->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8); + + /* Check for the codec handle. If it is not present then we + * are done */ + if (!of_get_property(op->node, "codec-handle", NULL)) + return 0; + + /* Set up mode register; + * First write: RxRdy (FIFO Alarm) generates rx FIFO irq + * Second write: register Normal mode for non loopback + */ + out_8(&psc_i2s->psc_regs->mode, 0); + out_8(&psc_i2s->psc_regs->mode, 0); + + /* Set the TX and RX fifo alarm thresholds */ + out_be16(&psc_i2s->fifo_regs->rfalarm, 0x100); + out_8(&psc_i2s->fifo_regs->rfcntl, 0x4); + out_be16(&psc_i2s->fifo_regs->tfalarm, 0x100); + out_8(&psc_i2s->fifo_regs->tfcntl, 0x7); + + /* Lookup the IRQ numbers */ + psc_i2s->playback.irq = + bcom_get_task_irq(psc_i2s->playback.bcom_task); + psc_i2s->capture.irq = + bcom_get_task_irq(psc_i2s->capture.bcom_task); + + /* Save what we've done so it can be found again later */ + dev_set_drvdata(&op->dev, psc_i2s); + + /* Register the SYSFS files */ + rc = device_create_file(psc_i2s->dev, &dev_attr_status); + rc = device_create_file(psc_i2s->dev, &dev_attr_capture_overrun); + rc = device_create_file(psc_i2s->dev, &dev_attr_playback_underrun); + if (rc) + dev_info(psc_i2s->dev, "error creating sysfs files\n"); + + /* Tell the ASoC OF helpers about it */ + of_snd_soc_register_platform(&psc_i2s_pcm_soc_platform, op->node, + &psc_i2s->dai); + + return 0; +} + +static int __devexit psc_i2s_of_remove(struct of_device *op) +{ + struct psc_i2s *psc_i2s = dev_get_drvdata(&op->dev); + + dev_dbg(&op->dev, "psc_i2s_remove()\n"); + + bcom_gen_bd_rx_release(psc_i2s->capture.bcom_task); + bcom_gen_bd_tx_release(psc_i2s->playback.bcom_task); + + iounmap(psc_i2s->psc_regs); + iounmap(psc_i2s->fifo_regs); + kfree(psc_i2s); + dev_set_drvdata(&op->dev, NULL); + + return 0; +} + +/* Match table for of_platform binding */ +static struct of_device_id psc_i2s_match[] __devinitdata = { + { .compatible = "fsl,mpc5200-psc-i2s", }, + {} +}; +MODULE_DEVICE_TABLE(of, psc_i2s_match); + +static struct of_platform_driver psc_i2s_driver = { + .match_table = psc_i2s_match, + .probe = psc_i2s_of_probe, + .remove = __devexit_p(psc_i2s_of_remove), + .driver = { + .name = "mpc5200-psc-i2s", + .owner = THIS_MODULE, + }, +}; + +/* --------------------------------------------------------------------- + * Module setup and teardown; simply register the of_platform driver + * for the PSC in I2S mode. + */ +static int __init psc_i2s_init(void) +{ + return of_register_platform_driver(&psc_i2s_driver); +} +module_init(psc_i2s_init); + +static void __exit psc_i2s_exit(void) +{ + of_unregister_platform_driver(&psc_i2s_driver); +} +module_exit(psc_i2s_exit); + + -- cgit v1.1 From 4f3ea08a129c15f64312cebfac1bfcc228f5caae Mon Sep 17 00:00:00 2001 From: Timur Tabi Date: Wed, 6 Aug 2008 15:01:01 -0500 Subject: ALSA: ASoC - fix DMA channel selection in Freescale MPC8610 sound drivers On the Freescale MPC8610, SSI1 is hard-coded to use DMA channels 0 and 1 for playback and capture, and SSI2 is hard-coded to use DMA channels 2 and 3. This patch fixes the fabric driver so that it uses the right channels. Signed-off-by: Timur Tabi Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/soc/fsl/mpc8610_hpcd.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) (limited to 'sound/soc/fsl') diff --git a/sound/soc/fsl/mpc8610_hpcd.c b/sound/soc/fsl/mpc8610_hpcd.c index 4bdc9d8..94f89de 100644 --- a/sound/soc/fsl/mpc8610_hpcd.c +++ b/sound/soc/fsl/mpc8610_hpcd.c @@ -68,10 +68,6 @@ static int mpc8610_hpcd_machine_probe(struct platform_device *sound_device) guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id, machine_data->dma_channel_id[1], 0); - guts_set_pmuxcr_dma(machine_data->guts, 1, 0, 0); - guts_set_pmuxcr_dma(machine_data->guts, 1, 3, 0); - guts_set_pmuxcr_dma(machine_data->guts, 0, 3, 0); - switch (machine_data->ssi_id) { case 0: clrsetbits_be32(&machine_data->guts->pmuxcr, @@ -230,6 +226,8 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, struct fsl_ssi_info ssi_info; struct fsl_dma_info dma_info; int ret = -ENODEV; + unsigned int playback_dma_channel; + unsigned int capture_dma_channel; machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL); if (!machine_data) @@ -381,8 +379,9 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, goto error; } - /* Find the DMA channels to use. For now, we always use the first DMA - controller. */ + /* Find the DMA channels to use. Both SSIs need to use the same DMA + * controller, so let's use DMA#1. + */ for_each_compatible_node(dma_np, NULL, "fsl,mpc8610-dma") { iprop = of_get_property(dma_np, "cell-index", NULL); if (iprop && (*iprop == 0)) { @@ -397,14 +396,19 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, } machine_data->dma_id = *iprop; + /* SSI1 needs to use DMA Channels 0 and 1, and SSI2 needs to use DMA + * channels 2 and 3. This is just how the MPC8610 is wired + * internally. + */ + playback_dma_channel = (machine_data->ssi_id == 0) ? 0 : 2; + capture_dma_channel = (machine_data->ssi_id == 0) ? 1 : 3; + /* - * Find the DMA channels to use. For now, we always use DMA channel 0 - * for playback, and DMA channel 1 for capture. + * Find the DMA channels to use. */ while ((dma_channel_np = of_get_next_child(dma_np, dma_channel_np))) { iprop = of_get_property(dma_channel_np, "cell-index", NULL); - /* Is it DMA channel 0? */ - if (iprop && (*iprop == 0)) { + if (iprop && (*iprop == playback_dma_channel)) { /* dma_channel[0] and dma_irq[0] are for playback */ dma_info.dma_channel[0] = of_iomap(dma_channel_np, 0); dma_info.dma_irq[0] = @@ -412,7 +416,7 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, machine_data->dma_channel_id[0] = *iprop; continue; } - if (iprop && (*iprop == 1)) { + if (iprop && (*iprop == capture_dma_channel)) { /* dma_channel[1] and dma_irq[1] are for capture */ dma_info.dma_channel[1] = of_iomap(dma_channel_np, 0); dma_info.dma_irq[1] = -- cgit v1.1