// SPDX-License-Identifier: GPL-2.0-only /* * omap-mcbsp.c -- OMAP ALSA SoC DAI driver using McBSP port * * Copyright (C) 2008 Nokia Corporation * * Contact: Jarkko Nikula <[email protected]> * Peter Ujfalusi <[email protected]> */ #include <linux/init.h> #include <linux/module.h> #include <linux/device.h> #include <linux/pm_runtime.h> #include <linux/of.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/initval.h> #include <sound/soc.h> #include <sound/dmaengine_pcm.h> #include "omap-mcbsp-priv.h" #include "omap-mcbsp.h" #include "sdma-pcm.h" #define OMAP_MCBSP_RATES … enum { … }; static void omap_mcbsp_dump_reg(struct omap_mcbsp *mcbsp) { … } static int omap2_mcbsp_set_clks_src(struct omap_mcbsp *mcbsp, u8 fck_src_id) { … } static irqreturn_t omap_mcbsp_irq_handler(int irq, void *data) { … } static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *data) { … } static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *data) { … } /* * omap_mcbsp_config simply write a config to the * appropriate McBSP. * You either call this function or set the McBSP registers * by yourself before calling omap_mcbsp_start(). */ static void omap_mcbsp_config(struct omap_mcbsp *mcbsp, const struct omap_mcbsp_reg_cfg *config) { … } /** * omap_mcbsp_dma_reg_params - returns the address of mcbsp data register * @mcbsp: omap_mcbsp struct for the McBSP instance * @stream: Stream direction (playback/capture) * * Returns the address of mcbsp data transmit register or data receive register * to be used by DMA for transferring/receiving data */ static int omap_mcbsp_dma_reg_params(struct omap_mcbsp *mcbsp, unsigned int stream) { … } /* * omap_mcbsp_set_rx_threshold configures the transmit threshold in words. * The threshold parameter is 1 based, and it is converted (threshold - 1) * for the THRSH2 register. */ static void omap_mcbsp_set_tx_threshold(struct omap_mcbsp *mcbsp, u16 threshold) { … } /* * omap_mcbsp_set_rx_threshold configures the receive threshold in words. * The threshold parameter is 1 based, and it is converted (threshold - 1) * for the THRSH1 register. */ static void omap_mcbsp_set_rx_threshold(struct omap_mcbsp *mcbsp, u16 threshold) { … } /* * omap_mcbsp_get_tx_delay returns the number of used slots in the McBSP FIFO */ static u16 omap_mcbsp_get_tx_delay(struct omap_mcbsp *mcbsp) { … } /* * omap_mcbsp_get_rx_delay returns the number of free slots in the McBSP FIFO * to reach the threshold value (when the DMA will be triggered to read it) */ static u16 omap_mcbsp_get_rx_delay(struct omap_mcbsp *mcbsp) { … } static int omap_mcbsp_request(struct omap_mcbsp *mcbsp) { … } static void omap_mcbsp_free(struct omap_mcbsp *mcbsp) { … } /* * Here we start the McBSP, by enabling transmitter, receiver or both. * If no transmitter or receiver is active prior calling, then sample-rate * generator and frame sync are started. */ static void omap_mcbsp_start(struct omap_mcbsp *mcbsp, int stream) { … } static void omap_mcbsp_stop(struct omap_mcbsp *mcbsp, int stream) { … } #define max_thres(m) … #define valid_threshold(m, val) … #define THRESHOLD_PROP_BUILDER(prop) … THRESHOLD_PROP_BUILDER(…); THRESHOLD_PROP_BUILDER(…); static const char * const dma_op_modes[] = …; static ssize_t dma_op_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t dma_op_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { … } static DEVICE_ATTR_RW(dma_op_mode); static const struct attribute *additional_attrs[] = …; static const struct attribute_group additional_attr_group = …; /* * McBSP1 and McBSP3 are directly mapped on 1610 and 1510. * 730 has only 2 McBSP, and both of them are MPU peripherals. */ static int omap_mcbsp_init(struct platform_device *pdev) { … } /* * Stream DMA parameters. DMA request line and port address are set runtime * since they are different between OMAP1 and later OMAPs */ static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream, unsigned int packet_size) { … } static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { … } static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { … } static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { … } static int omap_mcbsp_dai_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { … } static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *cpu_dai) { … } static snd_pcm_sframes_t omap_mcbsp_dai_delay( struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { … } static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *cpu_dai) { … } /* * This must be called before _set_clkdiv and _set_sysclk since McBSP register * cache is initialized here */ static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { … } static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai, int div_id, int div) { … } static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, int dir) { … } static int omap_mcbsp_probe(struct snd_soc_dai *dai) { … } static int omap_mcbsp_remove(struct snd_soc_dai *dai) { … } static const struct snd_soc_dai_ops mcbsp_dai_ops = …; static struct snd_soc_dai_driver omap_mcbsp_dai = …; static const struct snd_soc_component_driver omap_mcbsp_component = …; static struct omap_mcbsp_platform_data omap2420_pdata = …; static struct omap_mcbsp_platform_data omap2430_pdata = …; static struct omap_mcbsp_platform_data omap3_pdata = …; static struct omap_mcbsp_platform_data omap4_pdata = …; static const struct of_device_id omap_mcbsp_of_match[] = …; MODULE_DEVICE_TABLE(of, omap_mcbsp_of_match); static int asoc_mcbsp_probe(struct platform_device *pdev) { … } static void asoc_mcbsp_remove(struct platform_device *pdev) { … } static struct platform_driver asoc_mcbsp_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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