// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2019 MediaTek Inc. * Author: Michael Hsiao */ /******************************************************************************* * * Filename: * --------- * mtk_pcm_i2s0_awb.c * * Project: * -------- * Audio Driver Kernel Function * * Description: * ------------ * Audio i2s0 to awb capture * * Author: * ------- * Chipeng Chang * *----------------------------------------------------------------------------- * * ***************************************************************************** */ /***************************************************************************** * C O M P I L E R F L A G S *****************************************************************************/ /***************************************************************************** * E X T E R N A L R E F E R E N C E S *****************************************************************************/ #include "mtk-auddrv-afe.h" #include "mtk-auddrv-ana.h" #include "mtk-auddrv-clk.h" #include "mtk-auddrv-common.h" #include "mtk-auddrv-def.h" #include "mtk-auddrv-kernel.h" #include "mtk-soc-afe-control.h" #include "mtk-soc-pcm-common.h" #include "mtk-soc-pcm-platform.h" #include /* information about */ static struct afe_mem_control_t *I2S0_AWB_Control_context; static struct snd_dma_buffer *Awb_Capture_dma_buf; /* * function implementation */ static void StartAudioI2sInAWBHardware(struct snd_pcm_substream *substream); static void StopAudioI2sInAWBHardware(struct snd_pcm_substream *substream); static int mtk_i2s0_awb_probe(struct platform_device *pdev); static int mtk_i2s0_awb_pcm_close(struct snd_pcm_substream *substream); static int mtk_i2s0_dl1_awb_component_probe(struct snd_soc_component *component); static struct snd_pcm_hardware mtk_I2S0_awb_hardware = { .info = (SNDRV_PCM_INFO_INTERLEAVED), .formats = SND_SOC_STD_MT_FMTS, .rates = SOC_HIGH_USE_RATE, .rate_min = SOC_HIGH_USE_RATE_MIN, .rate_max = SOC_HIGH_USE_RATE_MAX, .channels_min = SOC_NORMAL_USE_CHANNELS_MIN, .channels_max = SOC_NORMAL_USE_CHANNELS_MAX, .buffer_bytes_max = AWB_MAX_BUFFER_SIZE, .period_bytes_max = AWB_MAX_BUFFER_SIZE, .periods_min = AWB_MIN_PERIOD_SIZE, .periods_max = AWB_MAX_PERIOD_SIZE, .fifo_size = 0, }; static void StopAudioI2sInAWBHardware(struct snd_pcm_substream *substream) { /* stop connection between default i2s in(i2s0) and awb. * i2s in configuration is in mtk-soc-pcm-dl1-i2s0.c */ SetIntfConnection(Soc_Aud_InterCon_DisConnect, Soc_Aud_AFE_IO_Block_I2S0, Soc_Aud_AFE_IO_Block_MEM_AWB); SetMemoryPathEnable(Soc_Aud_Digital_Block_MEM_AWB, false); /* here to set interrupt */ irq_remove_user(substream, irq_request_number(Soc_Aud_Digital_Block_MEM_AWB)); EnableAfe(false); } static void StartAudioI2sInAWBHardware(struct snd_pcm_substream *substream) { /* start connection between default i2s in(i2s0) and awb. * i2s in configuration is in mtk-soc-pcm-dl1-i2s0.c */ SetIntfConnection(Soc_Aud_InterCon_Connection, Soc_Aud_AFE_IO_Block_I2S0, Soc_Aud_AFE_IO_Block_MEM_AWB); /* here to set interrupt */ irq_add_user( substream, irq_request_number(Soc_Aud_Digital_Block_MEM_AWB), substream->runtime->rate, substream->runtime->period_size >> 1); SetSampleRate(Soc_Aud_Digital_Block_MEM_AWB, substream->runtime->rate); SetMemoryPathEnable(Soc_Aud_Digital_Block_MEM_AWB, true); EnableAfe(true); } static int mtk_i2s0_awb_pcm_prepare(struct snd_pcm_substream *substream) { pr_debug("%s substream->rate = %d channels = %d\n", __func__, substream->runtime->rate, substream->runtime->channels); return 0; } static int mtk_i2s0_awb_alsa_stop(struct snd_pcm_substream *substream) { /* struct afe_block_t *Awb_Block = &(I2S0_AWB_Control_context->rBlock); */ pr_debug("mtk_i2s0_awb_alsa_stop\n"); StopAudioI2sInAWBHardware(substream); RemoveMemifSubStream(Soc_Aud_Digital_Block_MEM_AWB, substream); return 0; } static snd_pcm_uframes_t mtk_i2s0_awb_pcm_pointer(struct snd_pcm_substream *substream) { return get_mem_frame_index(substream, I2S0_AWB_Control_context, Soc_Aud_Digital_Block_MEM_AWB); } static int mtk_i2s0_awb_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 *dma_buf = &substream->dma_buffer; int ret = 0; dma_buf->dev.type = SNDRV_DMA_TYPE_DEV; dma_buf->dev.dev = substream->pcm->card->dev; dma_buf->private_data = NULL; if (Awb_Capture_dma_buf->area) { pr_debug("mtk_i2s0_awb_pcm_hw_params Awb_Capture_dma_buf->area\n"); runtime->dma_bytes = params_buffer_bytes(hw_params); runtime->dma_area = Awb_Capture_dma_buf->area; runtime->dma_addr = Awb_Capture_dma_buf->addr; SetHighAddr(Soc_Aud_Digital_Block_MEM_AWB, true, runtime->dma_addr); } else { pr_debug("mtk_i2s0_awb_pcm_hw_params snd_pcm_lib_malloc_pages\n"); ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); } set_mem_block(substream, hw_params, I2S0_AWB_Control_context, Soc_Aud_Digital_Block_MEM_AWB); AudDrv_Emi_Clk_On(); pr_debug("dma_bytes = %zu dma_area = %p dma_addr = 0x%lx\n", substream->runtime->dma_bytes, substream->runtime->dma_area, (long)substream->runtime->dma_addr); return ret; } static int mtk_i2s0_capture_pcm_hw_free(struct snd_pcm_substream *substream) { pr_debug("mtk_i2s0_capture_pcm_hw_free\n"); AudDrv_Emi_Clk_Off(); if (Awb_Capture_dma_buf->area) return 0; else return snd_pcm_lib_free_pages(substream); } static struct snd_pcm_hw_constraint_list dl1_awb_constraints_sample_rates = { .count = ARRAY_SIZE(soc_high_supported_sample_rates), .list = soc_high_supported_sample_rates, }; static int mtk_i2s0_awb_pcm_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; int ret = 0; pr_debug("mtk_i2s0_awb_pcm_open\n"); I2S0_AWB_Control_context = Get_Mem_ControlT(Soc_Aud_Digital_Block_MEM_AWB); runtime->hw = mtk_I2S0_awb_hardware; memcpy((void *)(&(runtime->hw)), (void *)&mtk_I2S0_awb_hardware, sizeof(struct snd_pcm_hardware)); ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &dl1_awb_constraints_sample_rates); ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); /* here open audio clocks */ AudDrv_Clk_On(); /* print for hw pcm information */ pr_debug("mtk_i2s0_awb_pcm_open runtime rate = %d channels = %d\n", runtime->rate, runtime->channels); runtime->hw.info |= SNDRV_PCM_INFO_INTERLEAVED; runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; runtime->hw.info |= SNDRV_PCM_INFO_MMAP_VALID; if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) pr_info("SNDRV_PCM_STREAM_CAPTURE\n"); else return -1; if (ret < 0) { pr_err("mtk_i2s0_awb_pcm_close\n"); mtk_i2s0_awb_pcm_close(substream); return ret; } pr_debug("mtk_i2s0_awb_pcm_open return\n"); return 0; } static int mtk_i2s0_awb_pcm_close(struct snd_pcm_substream *substream) { AudDrv_Clk_Off(); return 0; } static int mtk_i2s0_awb_alsa_start(struct snd_pcm_substream *substream) { pr_debug("mtk_i2s0_awb_alsa_start\n"); SetMemifSubStream(Soc_Aud_Digital_Block_MEM_AWB, substream); StartAudioI2sInAWBHardware(substream); return 0; } static int mtk_i2s0_awb_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { pr_debug("mtk_i2s0_awb_pcm_trigger cmd = %d\n", cmd); switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: return mtk_i2s0_awb_alsa_start(substream); case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: return mtk_i2s0_awb_alsa_stop(substream); } return -EINVAL; } static int mtk_i2s0_awb_pcm_copy(struct snd_pcm_substream *substream, int channel, unsigned long pos, void __user *buf, unsigned long bytes) { return mtk_memblk_copy(substream, channel, pos, buf, bytes, I2S0_AWB_Control_context, Soc_Aud_Digital_Block_MEM_AWB); } static int mtk_capture_pcm_silence(struct snd_pcm_substream *substream, int channel, unsigned long pos, unsigned long bytes) { return 0; /* do nothing */ } static void *dummy_page[2]; static struct page * mtk_i2s0_capture_pcm_page(struct snd_pcm_substream *substream, unsigned long offset) { return virt_to_page(dummy_page[substream->stream]); /* the same page */ } static struct snd_pcm_ops mtk_i2s0_awb_ops = { .open = mtk_i2s0_awb_pcm_open, .close = mtk_i2s0_awb_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = mtk_i2s0_awb_pcm_hw_params, .hw_free = mtk_i2s0_capture_pcm_hw_free, .prepare = mtk_i2s0_awb_pcm_prepare, .trigger = mtk_i2s0_awb_pcm_trigger, .pointer = mtk_i2s0_awb_pcm_pointer, .copy_user = mtk_i2s0_awb_pcm_copy, .fill_silence = mtk_capture_pcm_silence, .page = mtk_i2s0_capture_pcm_page, }; static struct snd_soc_component_driver mtk_soc_component = { .name = AFE_PCM_NAME, .ops = &mtk_i2s0_awb_ops, .probe = mtk_i2s0_dl1_awb_component_probe, }; static int mtk_i2s0_awb_probe(struct platform_device *pdev) { pr_debug("mtk_i2s0_awb_probe\n"); pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); if (!pdev->dev.dma_mask) pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; if (pdev->dev.of_node) dev_set_name(&pdev->dev, "%s", MT_SOC_I2S0_AWB_PCM); pdev->name = pdev->dev.kobj.name; pr_debug("%s: dev name %s\n", __func__, dev_name(&pdev->dev)); return snd_soc_register_component(&pdev->dev, &mtk_soc_component, NULL, 0); } static int mtk_i2s0_dl1_awb_component_probe(struct snd_soc_component *component) { pr_debug("%s\n", __func__); AudDrv_Allocate_mem_Buffer(component->dev, Soc_Aud_Digital_Block_MEM_AWB, AWB_MAX_BUFFER_SIZE); Awb_Capture_dma_buf = Get_Mem_Buffer(Soc_Aud_Digital_Block_MEM_AWB); return 0; } static int mtk_dl1_awb_remove(struct platform_device *pdev) { pr_debug("%s\n", __func__); snd_soc_unregister_component(&pdev->dev); return 0; } #ifdef CONFIG_OF static const struct of_device_id mt_soc_pcm_i2s0_awb_of_ids[] = { { .compatible = "mediatek,mt_soc_pcm_i2s0_awb", }, {} }; #endif static struct platform_driver mtk_i2s0_awb_capture_driver = { .driver = { .name = MT_SOC_I2S0_AWB_PCM, .owner = THIS_MODULE, #ifdef CONFIG_OF .of_match_table = mt_soc_pcm_i2s0_awb_of_ids, #endif }, .probe = mtk_i2s0_awb_probe, .remove = mtk_dl1_awb_remove, }; #ifndef CONFIG_OF static struct platform_device *soc_i2s0_awb_capture_dev; #endif static int __init mtk_soc_i2s0_awb_platform_init(void) { int ret = 0; pr_debug("%s\n", __func__); #ifndef CONFIG_OF soc_i2s0_awb_capture_dev = platform_device_alloc(MT_SOC_I2S0_AWB_PCM, -1); if (!soc_i2s0_awb_capture_dev) return -ENOMEM; ret = platform_device_add(soc_i2s0_awb_capture_dev); if (ret != 0) { platform_device_put(soc_i2s0_awb_capture_dev); return ret; } #endif ret = platform_driver_register(&mtk_i2s0_awb_capture_driver); return ret; } static void __exit mtk_soc_i2s0_awb_platform_exit(void) { platform_driver_unregister(&mtk_i2s0_awb_capture_driver); } module_init(mtk_soc_i2s0_awb_platform_init); module_exit(mtk_soc_i2s0_awb_platform_exit); MODULE_DESCRIPTION("I2S0 AWB module platform driver"); MODULE_LICENSE("GPL");