Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753134AbbHGLow (ORCPT ); Fri, 7 Aug 2015 07:44:52 -0400 Received: from bhuna.collabora.co.uk ([93.93.135.160]:44218 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752847AbbHGLoj (ORCPT ); Fri, 7 Aug 2015 07:44:39 -0400 From: Sjoerd Simons To: linux-rockchip@lists.infradead.org Cc: Jaroslav Kysela , devicetree@vger.kernel.org, alsa-devel@alsa-project.org, Heiko Stuebner , Mark Brown , linux-kernel@vger.kernel.org, Kumar Gala , Ian Campbell , Takashi Iwai , Liam Girdwood , Sjoerd Simons , Pawel Moll , Rob Herring , Mark Rutland , Russell King , linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 2/4] ASoC: rockchip: Add rockchip SPDIF transceiver driver Date: Fri, 7 Aug 2015 13:44:12 +0200 Message-Id: <1438947854-3743-3-git-send-email-sjoerd.simons@collabora.co.uk> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1438947854-3743-1-git-send-email-sjoerd.simons@collabora.co.uk> References: <1438947854-3743-1-git-send-email-sjoerd.simons@collabora.co.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 13724 Lines: 520 Add a driver for the SPDIF transceiver available on RK3066, RK3188 and RK3288. Heavily based on the rockchip i2s driver. Signed-off-by: Sjoerd Simons --- Changes in v3: - Fix typos in commit message Changes in v2: - Remove platform: module alias as it was unused - Call MODULE_DEVICE_TABLE(of, ) right after the of match table - use rk_spdif as a prefix consistenly throughout the driver - Check return code of regmap_update and bubble it up sound/soc/rockchip/Kconfig | 8 + sound/soc/rockchip/Makefile | 2 + sound/soc/rockchip/rockchip_spdif.c | 381 ++++++++++++++++++++++++++++++++++++ sound/soc/rockchip/rockchip_spdif.h | 63 ++++++ 4 files changed, 454 insertions(+) create mode 100644 sound/soc/rockchip/rockchip_spdif.c create mode 100644 sound/soc/rockchip/rockchip_spdif.h diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig index 58bae8e..603fd1f 100644 --- a/sound/soc/rockchip/Kconfig +++ b/sound/soc/rockchip/Kconfig @@ -15,6 +15,14 @@ config SND_SOC_ROCKCHIP_I2S Rockchip I2S device. The device supports upto maximum of 8 channels each for play and record. +config SND_SOC_ROCKCHIP_SPDIF + tristate "Rockchip SPDIF Device Driver" + depends on CLKDEV_LOOKUP && SND_SOC_ROCKCHIP + select SND_SOC_GENERIC_DMAENGINE_PCM + help + Say Y or M if you want to add support for SPDIF driver for + Rockchip SPDIF transceiver device. + config SND_SOC_ROCKCHIP_MAX98090 tristate "ASoC support for Rockchip boards using a MAX98090 codec" depends on SND_SOC_ROCKCHIP && I2C && GPIOLIB diff --git a/sound/soc/rockchip/Makefile b/sound/soc/rockchip/Makefile index 1bc1dc3..9a244d7 100644 --- a/sound/soc/rockchip/Makefile +++ b/sound/soc/rockchip/Makefile @@ -1,7 +1,9 @@ # ROCKCHIP Platform Support snd-soc-i2s-objs := rockchip_i2s.o +snd-soc-spdif-objs := rockchip_spdif.o obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-i2s.o +obj-$(CONFIG_SND_SOC_ROCKCHIP_SPDIF) += snd-soc-spdif.o snd-soc-rockchip-max98090-objs := rockchip_max98090.o snd-soc-rockchip-rt5645-objs := rockchip_rt5645.o diff --git a/sound/soc/rockchip/rockchip_spdif.c b/sound/soc/rockchip/rockchip_spdif.c new file mode 100644 index 0000000..39d33c0 --- /dev/null +++ b/sound/soc/rockchip/rockchip_spdif.c @@ -0,0 +1,381 @@ +/* sound/soc/rockchip/rk_spdif.c + * + * ALSA SoC Audio Layer - Rockchip I2S Controller driver + * + * Copyright (c) 2014 Rockchip Electronics Co. Ltd. + * Author: Jianqun + * Copyright (c) 2015 Collabora Ltd. + * Author: Sjoerd Simons + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "rockchip_spdif.h" + +struct rk_spdif_dev { + struct device *dev; + + struct clk *mclk; + struct clk *hclk; + + struct snd_dmaengine_dai_dma_data playback_dma_data; + + struct regmap *regmap; +}; + +static int rk_spdif_runtime_suspend(struct device *dev) +{ + struct rk_spdif_dev *spdif = dev_get_drvdata(dev); + + clk_disable_unprepare(spdif->mclk); + + return 0; +} + +static int rk_spdif_runtime_resume(struct device *dev) +{ + struct rk_spdif_dev *spdif = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(spdif->mclk); + if (ret) { + dev_err(spdif->dev, "clock enable failed %d\n", ret); + return ret; + } + + return 0; +} + +static inline struct rk_spdif_dev *to_info(struct snd_soc_dai *dai) +{ + return snd_soc_dai_get_drvdata(dai); +} + +static int rk_spdif_snd_txctrl(struct rk_spdif_dev *spdif, int on) +{ + int ret; + + if (on) { + ret = regmap_update_bits(spdif->regmap, SPDIF_DMACR, + SPDIF_DMACR_TDE_ENABLE, + SPDIF_DMACR_TDE_ENABLE); + + if (ret != 0) + goto bail; + + ret = regmap_update_bits(spdif->regmap, SPDIF_XFER, + SPDIF_XFER_TXS_START, + SPDIF_XFER_TXS_START); + } else { + ret = regmap_update_bits(spdif->regmap, SPDIF_DMACR, + SPDIF_DMACR_TDE_ENABLE, + SPDIF_DMACR_TDE_DISABLE); + + if (ret != 0) + goto bail; + + ret = regmap_update_bits(spdif->regmap, SPDIF_XFER, + SPDIF_XFER_TXS_START, + SPDIF_XFER_TXS_STOP); + } + +bail: + return ret; +} + +static int rk_spdif_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct rk_spdif_dev *spdif = to_info(dai); + unsigned int val = SPDIF_CFGR_HALFWORD_ENABLE; + int srate, mclk; + + srate = params_rate(params); + switch (srate) { + case 32000: + case 48000: + case 96000: + mclk = 12288000; + break; + case 44100: + mclk = 11289600; + break; + default: + return -EINVAL; + } + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + val |= SPDIF_CFGR_VDW_16; + break; + case SNDRV_PCM_FORMAT_S20_3LE: + val |= SPDIF_CFGR_VDW_20; + break; + case SNDRV_PCM_FORMAT_S24_LE: + val |= SPDIF_CFGR_VDW_24; + break; + default: + return -EINVAL; + } + + /* Set clock and calculate divider */ + clk_set_rate(spdif->mclk, mclk); + val |= SPDIF_CFGR_CLK_DIV(mclk/(srate * 256)); + + return regmap_update_bits(spdif->regmap, SPDIF_CFGR, + SPDIF_CFGR_CLK_DIV_MASK | SPDIF_CFGR_HALFWORD_ENABLE | + SDPIF_CFGR_VDW_MASK, + val); +} + +static int rk_spdif_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct rk_spdif_dev *spdif = to_info(dai); + int ret; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + ret = rk_spdif_snd_txctrl(spdif, true); + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + ret = rk_spdif_snd_txctrl(spdif, false); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int rk_spdif_dai_probe(struct snd_soc_dai *dai) +{ + struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai); + + dai->playback_dma_data = &spdif->playback_dma_data; + + return 0; +} + +static const struct snd_soc_dai_ops rk_spdif_dai_ops = { + .hw_params = rk_spdif_hw_params, + .trigger = rk_spdif_trigger, +}; + +static struct snd_soc_dai_driver rk_spdif_dai = { + .probe = rk_spdif_dai_probe, + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = (SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000), + .formats = (SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S20_3LE | + SNDRV_PCM_FMTBIT_S24_LE), + }, + .ops = &rk_spdif_dai_ops, +}; + +static const struct snd_soc_component_driver rk_spdif_component = { + .name = "rockchip-spdif", +}; + +static bool rk_spdif_wr_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case SPDIF_CFGR: + case SPDIF_DMACR: + case SPDIF_INTCR: + case SPDIF_XFER: + case SPDIF_SMPDR: + return true; + default: + return false; + } +} + +static bool rk_spdif_rd_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case SPDIF_CFGR: + case SPDIF_SDBLR: + case SPDIF_INTCR: + case SPDIF_INTSR: + case SPDIF_XFER: + return true; + default: + return false; + } +} + +static bool rk_spdif_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case SPDIF_INTSR: + case SPDIF_SDBLR: + return true; + default: + return false; + } +} + +static const struct regmap_config rk_spdif_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = SPDIF_SMPDR, + .writeable_reg = rk_spdif_wr_reg, + .readable_reg = rk_spdif_rd_reg, + .volatile_reg = rk_spdif_volatile_reg, + .cache_type = REGCACHE_FLAT, +}; + +static int rk_spdif_probe(struct platform_device *pdev) +{ + struct rk_spdif_dev *spdif; + struct resource *res; + void __iomem *regs; + int ret; + + spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL); + if (!spdif) + return -ENOMEM; + + spdif->hclk = devm_clk_get(&pdev->dev, "spdif_hclk"); + if (IS_ERR(spdif->hclk)) { + dev_err(&pdev->dev, "Can't retrieve rk_spdif bus clock\n"); + return PTR_ERR(spdif->hclk); + } + ret = clk_prepare_enable(spdif->hclk); + if (ret) { + dev_err(spdif->dev, "hclock enable failed %d\n", ret); + return ret; + } + + spdif->mclk = devm_clk_get(&pdev->dev, "spdif_clk"); + if (IS_ERR(spdif->mclk)) { + dev_err(&pdev->dev, "Can't retrieve rk_spdif master clock\n"); + return PTR_ERR(spdif->hclk); + } + + ret = clk_prepare_enable(spdif->mclk); + if (ret) { + dev_err(spdif->dev, "clock enable failed %d\n", ret); + return ret; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs, + &rk_spdif_regmap_config); + if (IS_ERR(spdif->regmap)) { + dev_err(&pdev->dev, + "Failed to initialise managed register map\n"); + return PTR_ERR(spdif->regmap); + } + + spdif->playback_dma_data.addr = res->start + SPDIF_SMPDR; + spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + spdif->playback_dma_data.maxburst = 4; + + spdif->dev = &pdev->dev; + dev_set_drvdata(&pdev->dev, spdif); + + pm_runtime_enable(&pdev->dev); + if (!pm_runtime_enabled(&pdev->dev)) { + ret = rk_spdif_runtime_resume(&pdev->dev); + if (ret) + goto err_pm_disable; + } + + ret = devm_snd_soc_register_component(&pdev->dev, + &rk_spdif_component, + &rk_spdif_dai, 1); + if (ret) { + dev_err(&pdev->dev, "Could not register DAI\n"); + goto err_suspend; + } + + ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); + if (ret) { + dev_err(&pdev->dev, "Could not register PCM\n"); + goto err_pcm_register; + } + + return 0; + +err_pcm_register: + snd_dmaengine_pcm_unregister(&pdev->dev); +err_suspend: + if (!pm_runtime_status_suspended(&pdev->dev)) + rk_spdif_runtime_suspend(&pdev->dev); +err_pm_disable: + pm_runtime_disable(&pdev->dev); + + return ret; +} + +static int rk_spdif_remove(struct platform_device *pdev) +{ + struct rk_spdif_dev *spdif = dev_get_drvdata(&pdev->dev); + + pm_runtime_disable(&pdev->dev); + if (!pm_runtime_status_suspended(&pdev->dev)) + rk_spdif_runtime_suspend(&pdev->dev); + + clk_disable_unprepare(spdif->mclk); + clk_disable_unprepare(spdif->hclk); + snd_dmaengine_pcm_unregister(&pdev->dev); + snd_soc_unregister_component(&pdev->dev); + + return 0; +} + +static const struct of_device_id rk_spdif_match[] = { + { .compatible = "rockchip,rk3066-spdif", }, + {}, +}; +MODULE_DEVICE_TABLE(of, rk_spdif_match); + +static const struct dev_pm_ops rk_spdif_pm_ops = { + SET_RUNTIME_PM_OPS(rk_spdif_runtime_suspend, rk_spdif_runtime_resume, + NULL) +}; + +static struct platform_driver rk_spdif_driver = { + .probe = rk_spdif_probe, + .remove = rk_spdif_remove, + .driver = { + .name = "rockchip-spdif", + .of_match_table = of_match_ptr(rk_spdif_match), + .pm = &rk_spdif_pm_ops, + }, +}; +module_platform_driver(rk_spdif_driver); + +MODULE_DESCRIPTION("ROCKCHIP SPDIF transceiver Interface"); +MODULE_AUTHOR("Sjoerd Simons "); +MODULE_LICENSE("GPL v2"); diff --git a/sound/soc/rockchip/rockchip_spdif.h b/sound/soc/rockchip/rockchip_spdif.h new file mode 100644 index 0000000..07f86a2 --- /dev/null +++ b/sound/soc/rockchip/rockchip_spdif.h @@ -0,0 +1,63 @@ +/* + * ALSA SoC Audio Layer - Rockchip SPDIF transceiver driver + * + * Copyright (c) 2015 Collabora Ltd. + * Author: Sjoerd Simons + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _ROCKCHIP_SPDIF_H +#define _ROCKCHIP_SPDIF_H + +/* + * CFGR + * transfer configuration register +*/ +#define SPDIF_CFGR_CLK_DIV_SHIFT (16) +#define SPDIF_CFGR_CLK_DIV_MASK (0xff << SPDIF_CFGR_CLK_DIV_SHIFT) +#define SPDIF_CFGR_CLK_DIV(x) (x << SPDIF_CFGR_CLK_DIV_SHIFT) + +#define SPDIF_CFGR_HALFWORD_SHIFT 2 +#define SPDIF_CFGR_HALFWORD_DISABLE (0 << SPDIF_CFGR_HALFWORD_SHIFT) +#define SPDIF_CFGR_HALFWORD_ENABLE (1 << SPDIF_CFGR_HALFWORD_SHIFT) + +#define SPDIF_CFGR_VDW_SHIFT 0 +#define SPDIF_CFGR_VDW(x) (x << SPDIF_CFGR_VDW_SHIFT) +#define SDPIF_CFGR_VDW_MASK (0xf << SPDIF_CFGR_VDW_SHIFT) + +#define SPDIF_CFGR_VDW_16 SPDIF_CFGR_VDW(0x00) +#define SPDIF_CFGR_VDW_20 SPDIF_CFGR_VDW(0x01) +#define SPDIF_CFGR_VDW_24 SPDIF_CFGR_VDW(0x10) + +/* + * DMACR + * DMA control register +*/ +#define SPDIF_DMACR_TDE_SHIFT 5 +#define SPDIF_DMACR_TDE_DISABLE (0 << SPDIF_DMACR_TDE_SHIFT) +#define SPDIF_DMACR_TDE_ENABLE (1 << SPDIF_DMACR_TDE_SHIFT) + +#define SPDIF_DMACR_TDL_SHIFT 0 +#define SPDIF_DMACR_TDL(x) ((x) << SPDIF_DMACR_TDL_SHIFT) +#define SPDIF_DMACR_TDL_MASK (0x1f << SDPIF_DMACR_TDL_SHIFT) + +/* + * XFER + * Transfer control register +*/ +#define SPDIF_XFER_TXS_SHIFT 0 +#define SPDIF_XFER_TXS_STOP (0 << SPDIF_XFER_TXS_SHIFT) +#define SPDIF_XFER_TXS_START (1 << SPDIF_XFER_TXS_SHIFT) + +#define SPDIF_CFGR (0x0000) +#define SPDIF_SDBLR (0x0004) +#define SPDIF_DMACR (0x0008) +#define SPDIF_INTCR (0x000c) +#define SPDIF_INTSR (0x0010) +#define SPDIF_XFER (0x0018) +#define SPDIF_SMPDR (0x0020) + +#endif /* _ROCKCHIP_SPDIF_H */ -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/