// SPDX-License-Identifier: GPL-2.0-only /* * AMD ALSA SoC PCM Driver for ACP 2.x * * Copyright 2014-2015 Advanced Micro Devices, Inc. */ #include <linux/module.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/sizes.h> #include <linux/pm_runtime.h> #include <sound/soc.h> #include <drm/amd_asic_type.h> #include "acp.h" #define DRV_NAME … #define PLAYBACK_MIN_NUM_PERIODS … #define PLAYBACK_MAX_NUM_PERIODS … #define PLAYBACK_MAX_PERIOD_SIZE … #define PLAYBACK_MIN_PERIOD_SIZE … #define CAPTURE_MIN_NUM_PERIODS … #define CAPTURE_MAX_NUM_PERIODS … #define CAPTURE_MAX_PERIOD_SIZE … #define CAPTURE_MIN_PERIOD_SIZE … #define MAX_BUFFER … #define MIN_BUFFER … #define ST_PLAYBACK_MAX_PERIOD_SIZE … #define ST_CAPTURE_MAX_PERIOD_SIZE … #define ST_MAX_BUFFER … #define ST_MIN_BUFFER … #define DRV_NAME … bool acp_bt_uart_enable = …; EXPORT_SYMBOL(…); static const struct snd_pcm_hardware acp_pcm_hardware_playback = …; static const struct snd_pcm_hardware acp_pcm_hardware_capture = …; static const struct snd_pcm_hardware acp_st_pcm_hardware_playback = …; static const struct snd_pcm_hardware acp_st_pcm_hardware_capture = …; static u32 acp_reg_read(void __iomem *acp_mmio, u32 reg) { … } static void acp_reg_write(u32 val, void __iomem *acp_mmio, u32 reg) { … } /* * Configure a given dma channel parameters - enable/disable, * number of descriptors, priority */ static void config_acp_dma_channel(void __iomem *acp_mmio, u8 ch_num, u16 dscr_strt_idx, u16 num_dscrs, enum acp_dma_priority_level priority_level) { … } /* Initialize a dma descriptor in SRAM based on descriptor information passed */ static void config_dma_descriptor_in_sram(void __iomem *acp_mmio, u16 descr_idx, acp_dma_dscr_transfer_t *descr_info) { … } static void pre_config_reset(void __iomem *acp_mmio, u16 ch_num) { … } /* * Initialize the DMA descriptor information for transfer between * system memory <-> ACP SRAM */ static void set_acp_sysmem_dma_descriptors(void __iomem *acp_mmio, u32 size, int direction, u32 pte_offset, u16 ch, u32 sram_bank, u16 dma_dscr_idx, u32 asic_type) { … } /* * Initialize the DMA descriptor information for transfer between * ACP SRAM <-> I2S */ static void set_acp_to_i2s_dma_descriptors(void __iomem *acp_mmio, u32 size, int direction, u32 sram_bank, u16 destination, u16 ch, u16 dma_dscr_idx, u32 asic_type) { … } /* Create page table entries in ACP SRAM for the allocated memory */ static void acp_pte_config(void __iomem *acp_mmio, dma_addr_t addr, u16 num_of_pages, u32 pte_offset) { … } static void config_acp_dma(void __iomem *acp_mmio, struct audio_substream_data *rtd, u32 asic_type) { … } static void acp_dma_cap_channel_enable(void __iomem *acp_mmio, u16 cap_channel) { … } static void acp_dma_cap_channel_disable(void __iomem *acp_mmio, u16 cap_channel) { … } /* Start a given DMA channel transfer */ static void acp_dma_start(void __iomem *acp_mmio, u16 ch_num, bool is_circular) { … } /* Stop a given DMA channel transfer */ static int acp_dma_stop(void __iomem *acp_mmio, u8 ch_num) { … } static void acp_set_sram_bank_state(void __iomem *acp_mmio, u16 bank, bool power_on) { … } /* Initialize and bring ACP hardware to default state. */ static int acp_init(void __iomem *acp_mmio, u32 asic_type) { … } /* Deinitialize ACP */ static int acp_deinit(void __iomem *acp_mmio) { … } /* ACP DMA irq handler routine for playback, capture usecases */ static irqreturn_t dma_irq_handler(int irq, void *arg) { … } static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) { … } static int acp_dma_hw_params(struct snd_soc_component *component, struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { … } static u64 acp_get_byte_count(struct audio_substream_data *rtd) { … } static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component, struct snd_pcm_substream *substream) { … } static snd_pcm_sframes_t acp_dma_delay(struct snd_soc_component *component, struct snd_pcm_substream *substream) { … } static int acp_dma_prepare(struct snd_soc_component *component, struct snd_pcm_substream *substream) { … } static int acp_dma_trigger(struct snd_soc_component *component, struct snd_pcm_substream *substream, int cmd) { … } static int acp_dma_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd) { … } static int acp_dma_close(struct snd_soc_component *component, struct snd_pcm_substream *substream) { … } static const struct snd_soc_component_driver acp_asoc_platform = …; static int acp_audio_probe(struct platform_device *pdev) { … } static void acp_audio_remove(struct platform_device *pdev) { … } static int acp_pcm_resume(struct device *dev) { … } static int acp_pcm_runtime_suspend(struct device *dev) { … } static int acp_pcm_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops acp_pm_ops = …; static struct platform_driver acp_dma_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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