/* * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * lpass-apq8016.c -- ALSA SoC CPU DAI driver for APQ8016 LPASS * */ #include <linux/clk.h> #include <linux/device.h> #include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/soc-dai.h> #include <dt-bindings/sound/apq8016-lpass.h> #include "lpass-lpaif-reg.h" #include "lpass.h" static struct snd_soc_dai_driver apq8016_lpass_cpu_dai_driver[] = { [MI2S_PRIMARY] = { .id = MI2S_PRIMARY, .name = "Primary MI2S", .playback = { .stream_name = "Primary Playback", .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_S32, .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000, .rate_min = 8000, .rate_max = 96000, .channels_min = 1, .channels_max = 8, }, .probe = &asoc_qcom_lpass_cpu_dai_probe, .ops = &asoc_qcom_lpass_cpu_dai_ops, }, [MI2S_SECONDARY] = { .id = MI2S_SECONDARY, .name = "Secondary MI2S", .playback = { .stream_name = "Secondary Playback", .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_S32, .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000, .rate_min = 8000, .rate_max = 96000, .channels_min = 1, .channels_max = 8, }, .probe = &asoc_qcom_lpass_cpu_dai_probe, .ops = &asoc_qcom_lpass_cpu_dai_ops, }, [MI2S_TERTIARY] = { .id = MI2S_TERTIARY, .name = "Tertiary MI2S", .capture = { .stream_name = "Tertiary Capture", .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_S32, .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000, .rate_min = 8000, .rate_max = 96000, .channels_min = 1, .channels_max = 8, }, .probe = &asoc_qcom_lpass_cpu_dai_probe, .ops = &asoc_qcom_lpass_cpu_dai_ops, }, [MI2S_QUATERNARY] = { .id = MI2S_QUATERNARY, .name = "Quatenary MI2S", .playback = { .stream_name = "Quatenary Playback", .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_S32, .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000, .rate_min = 8000, .rate_max = 96000, .channels_min = 1, .channels_max = 8, }, .capture = { .stream_name = "Quatenary Capture", .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_S32, .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000, .rate_min = 8000, .rate_max = 96000, .channels_min = 1, .channels_max = 8, }, .probe = &asoc_qcom_lpass_cpu_dai_probe, .ops = &asoc_qcom_lpass_cpu_dai_ops, }, }; static int apq8016_lpass_alloc_dma_channel(struct lpass_data *drvdata, int direction) { struct lpass_variant *v = drvdata->variant; int chan = 0; if (direction == SNDRV_PCM_STREAM_PLAYBACK) { chan = find_first_zero_bit(&drvdata->dma_ch_bit_map, v->rdma_channels); if (chan >= v->rdma_channels) return -EBUSY; } else { chan = find_next_zero_bit(&drvdata->dma_ch_bit_map, v->wrdma_channel_start + v->wrdma_channels, v->wrdma_channel_start); if (chan >= v->wrdma_channel_start + v->wrdma_channels) return -EBUSY; } set_bit(chan, &drvdata->dma_ch_bit_map); return chan; } static int apq8016_lpass_free_dma_channel(struct lpass_data *drvdata, int chan) { clear_bit(chan, &drvdata->dma_ch_bit_map); return 0; } static int apq8016_lpass_init(struct platform_device *pdev) { struct lpass_data *drvdata = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; int ret; drvdata->pcnoc_mport_clk = devm_clk_get(dev, "pcnoc-mport-clk"); if (IS_ERR(drvdata->pcnoc_mport_clk)) { dev_err(&pdev->dev, "%s() error getting pcnoc-mport-clk: %ld\n", __func__, PTR_ERR(drvdata->pcnoc_mport_clk)); return PTR_ERR(drvdata->pcnoc_mport_clk); } ret = clk_prepare_enable(drvdata->pcnoc_mport_clk); if (ret) { dev_err(&pdev->dev, "%s() Error enabling pcnoc-mport-clk: %d\n", __func__, ret); return ret; } drvdata->pcnoc_sway_clk = devm_clk_get(dev, "pcnoc-sway-clk"); if (IS_ERR(drvdata->pcnoc_sway_clk)) { dev_err(&pdev->dev, "%s() error getting pcnoc-sway-clk: %ld\n", __func__, PTR_ERR(drvdata->pcnoc_sway_clk)); return PTR_ERR(drvdata->pcnoc_sway_clk); } ret = clk_prepare_enable(drvdata->pcnoc_sway_clk); if (ret) { dev_err(&pdev->dev, "%s() Error enabling pcnoc_sway_clk: %d\n", __func__, ret); return ret; } return 0; } static int apq8016_lpass_exit(struct platform_device *pdev) { struct lpass_data *drvdata = platform_get_drvdata(pdev); clk_disable_unprepare(drvdata->pcnoc_mport_clk); clk_disable_unprepare(drvdata->pcnoc_sway_clk); return 0; } static struct lpass_variant apq8016_data = { .i2sctrl_reg_base = 0x1000, .i2sctrl_reg_stride = 0x1000, .i2s_ports = 4, .irq_reg_base = 0x6000, .irq_reg_stride = 0x1000, .irq_ports = 3, .rdma_reg_base = 0x8400, .rdma_reg_stride = 0x1000, .rdma_channels = 2, .dmactl_audif_start = 1, .wrdma_reg_base = 0xB000, .wrdma_reg_stride = 0x1000, .wrdma_channel_start = 5, .wrdma_channels = 2, .dai_driver = apq8016_lpass_cpu_dai_driver, .num_dai = ARRAY_SIZE(apq8016_lpass_cpu_dai_driver), .init = apq8016_lpass_init, .exit = apq8016_lpass_exit, .alloc_dma_channel = apq8016_lpass_alloc_dma_channel, .free_dma_channel = apq8016_lpass_free_dma_channel, }; static const struct of_device_id apq8016_lpass_cpu_device_id[] = { { .compatible = "qcom,lpass-cpu-apq8016", .data = &apq8016_data }, {} }; MODULE_DEVICE_TABLE(of, apq8016_lpass_cpu_device_id); static struct platform_driver apq8016_lpass_cpu_platform_driver = { .driver = { .name = "apq8016-lpass-cpu", .of_match_table = of_match_ptr(apq8016_lpass_cpu_device_id), }, .probe = asoc_qcom_lpass_cpu_platform_probe, .remove = asoc_qcom_lpass_cpu_platform_remove, }; module_platform_driver(apq8016_lpass_cpu_platform_driver); MODULE_DESCRIPTION("APQ8016 LPASS CPU Driver"); MODULE_LICENSE("GPL v2");