This patch adds tdm controller driver for zte's SoC family.

Signed-off-by: Baoyou Xie baoyou.xie@linaro.org --- sound/soc/zte/Kconfig | 8 + sound/soc/zte/Makefile | 1 + sound/soc/zte/zx-tdm.c | 461 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 470 insertions(+) create mode 100644 sound/soc/zte/zx-tdm.c

diff --git a/sound/soc/zte/Kconfig b/sound/soc/zte/Kconfig index 6d8a90d..75f67a5 100644 --- a/sound/soc/zte/Kconfig +++ b/sound/soc/zte/Kconfig @@ -15,3 +15,11 @@ config ZX_I2S help Say Y or M if you want to add support for codecs attached to the ZTE ZX I2S interface + +config ZX_TDM + tristate "ZTE ZX TDM Driver Support" + depends on COMMON_CLK + select SND_SOC_GENERIC_DMAENGINE_PCM + help + Say Y or M if you want to add support for codecs attached to the + ZTE ZX TDM interface diff --git a/sound/soc/zte/Makefile b/sound/soc/zte/Makefile index 77768f5..1fc841a 100644 --- a/sound/soc/zte/Makefile +++ b/sound/soc/zte/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_ZX_SPDIF) += zx-spdif.o obj-$(CONFIG_ZX_I2S) += zx-i2s.o +obj-$(CONFIG_ZX_TDM) += zx-tdm.o diff --git a/sound/soc/zte/zx-tdm.c b/sound/soc/zte/zx-tdm.c new file mode 100644 index 0000000..bd632cc --- /dev/null +++ b/sound/soc/zte/zx-tdm.c @@ -0,0 +1,461 @@ +/* + * ZTE's TDM driver + * + * Copyright (C) 2017 ZTE Ltd + * + * Author: Baoyou Xie baoyou.xie@linaro.org + * + * License terms: GNU General Public License (GPL) version 2 + */ + +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> + +#define REG_TIMING_CTRL 0x04 +#define REG_TX_FIFO_CTRL 0x0C +#define REG_RX_FIFO_CTRL 0x10 +#define REG_INT_EN 0x1C +#define REG_INT_STATUS 0x20 +#define REG_DATABUF 0x24 +#define REG_TS_MASK0 0x44 +#define REG_PROCESS_CTRL 0x54 + +#define FIFO_CTRL_TX_RST BIT(0) +#define FIFO_CTRL_RX_RST BIT(0) +#define DEAGULT_FIFO_THRES GENMASK(4, 2) + +#define FIFO_CTRL_TX_DMA_EN BIT(1) +#define FIFO_CTRL_RX_DMA_EN BIT(1) + +#define TX_FIFO_RST_MASK BIT(0) +#define RX_FIFO_RST_MASK BIT(0) + +#define FIFOCTRL_TX_FIFO_RST BIT(0) +#define FIFOCTRL_RX_FIFO_RST BIT(0) + +#define TXTH_MASK GENMASK(5, 2) +#define RXTH_MASK GENMASK(5, 2) + +#define FIFOCTRL_THRESHOLD(x) ((x) << 2) + +#define TIMING_MS_MASK BIT(1) +/* + * 00: 8 clk cycles every timeslot + * 01: 16 clk cycles every timeslot + * 10: 32 clk cycles every timeslot + */ +#define TIMING_SYNC_WIDTH_MASK GENMASK(6, 5) +#define TIMING_WIDTH_SHIFT 5 +#define TIMING_DEFAULT_WIDTH 0 +#define TIMING_TS_WIDTH(x) ((x) << TIMING_WIDTH_SHIFT) +#define TIMING_WIDTH_FACTOR 8 + +#define TIMING_MASTER_MODE BIT(21) +#define TIMING_LSB_FIRST BIT(20) +#define TIMING_TS_NUM(x) (((x) - 1) << 7) +#define TIMING_CLK_SEL_MASK GENMASK(2, 0) +#define TIMING_CLK_SEL_DEF BIT(2) + +#define PROCESS_TX_EN BIT(0) +#define PROCESS_RX_EN BIT(1) +#define PROCESS_TDM_EN BIT(2) +#define PROCESS_DISABLE_ALL 0 + +#define INT_DISABLE_ALL 0 +#define INT_STATUS_MASK GENMASK(6, 0) + +struct zx_tdm_info { + struct snd_dmaengine_dai_dma_data dma_playback; + struct snd_dmaengine_dai_dma_data dma_capture; + resource_size_t phy_addr; + void __iomem *regbase; + struct clk *dai_wclk; + struct clk *dai_pclk; + int master; + struct device *dev; +}; + +static inline u32 zx_tdm_readl(struct zx_tdm_info *tdm, u16 reg) +{ + return readl_relaxed(tdm->regbase + reg); +} + +static inline void zx_tdm_writel(struct zx_tdm_info *tdm, u16 reg, u32 val) +{ + writel_relaxed(val, tdm->regbase + reg); +} + +static void zx_tdm_tx_en(struct zx_tdm_info *tdm, bool on) +{ + unsigned long val; + + val = zx_tdm_readl(tdm, REG_PROCESS_CTRL); + if (on) + val |= PROCESS_TX_EN | PROCESS_TDM_EN; + else + val &= ~(PROCESS_TX_EN | PROCESS_TDM_EN); + zx_tdm_writel(tdm, REG_PROCESS_CTRL, val); +} + +static void zx_tdm_rx_en(struct zx_tdm_info *tdm, bool on) +{ + unsigned long val; + + val = zx_tdm_readl(tdm, REG_PROCESS_CTRL); + if (on) + val |= PROCESS_RX_EN | PROCESS_TDM_EN; + else + val &= ~(PROCESS_RX_EN | PROCESS_TDM_EN); + zx_tdm_writel(tdm, REG_PROCESS_CTRL, val); +} + +static void zx_tdm_tx_dma_en(struct zx_tdm_info *tdm, bool on) +{ + unsigned long val; + + val = zx_tdm_readl(tdm, REG_TX_FIFO_CTRL); + val |= FIFO_CTRL_TX_RST | DEAGULT_FIFO_THRES; + if (on) + val |= FIFO_CTRL_TX_DMA_EN; + else + val &= ~FIFO_CTRL_TX_DMA_EN; + zx_tdm_writel(tdm, REG_TX_FIFO_CTRL, val); +} + +static void zx_tdm_rx_dma_en(struct zx_tdm_info *tdm, bool on) +{ + unsigned long val; + + val = zx_tdm_readl(tdm, REG_RX_FIFO_CTRL); + val |= FIFO_CTRL_RX_RST | DEAGULT_FIFO_THRES; + if (on) + val |= FIFO_CTRL_RX_DMA_EN; + else + val &= ~FIFO_CTRL_RX_DMA_EN; + zx_tdm_writel(tdm, REG_RX_FIFO_CTRL, val); +} + +#define ZX_TDM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000) + +#define ZX_TDM_FMTBIT \ + (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_MU_LAW | \ + SNDRV_PCM_FORMAT_A_LAW) + +static int zx_tdm_dai_probe(struct snd_soc_dai *dai) +{ + struct zx_tdm_info *zx_tdm = dev_get_drvdata(dai->dev); + + snd_soc_dai_set_drvdata(dai, zx_tdm); + zx_tdm->dma_playback.addr = zx_tdm->phy_addr + REG_DATABUF; + zx_tdm->dma_playback.maxburst = 16; + zx_tdm->dma_capture.addr = zx_tdm->phy_addr + REG_DATABUF; + zx_tdm->dma_capture.maxburst = 16; + snd_soc_dai_init_dma_data(dai, &zx_tdm->dma_playback, + &zx_tdm->dma_capture); + return 0; +} + +static int zx_tdm_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) +{ + struct zx_tdm_info *tdm = snd_soc_dai_get_drvdata(cpu_dai); + unsigned long val; + + val = zx_tdm_readl(tdm, REG_TIMING_CTRL); + val &= ~(TIMING_SYNC_WIDTH_MASK | TIMING_MS_MASK); + val |= TIMING_DEFAULT_WIDTH << TIMING_WIDTH_SHIFT; + + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + tdm->master = 1; + val |= TIMING_MASTER_MODE; + break; + case SND_SOC_DAIFMT_CBS_CFS: + tdm->master = 0; + val &= ~TIMING_MASTER_MODE; + break; + default: + dev_err(cpu_dai->dev, "Unknown master/slave format\n"); + return -EINVAL; + } + + + zx_tdm_writel(tdm, REG_TIMING_CTRL, val); + + return 0; +} + +static int zx_tdm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *socdai) +{ + struct zx_tdm_info *tdm = snd_soc_dai_get_drvdata(socdai); + struct snd_dmaengine_dai_dma_data *dma_data; + unsigned int ts_width = TIMING_DEFAULT_WIDTH; + unsigned int ch_num = 32; + unsigned int mask = 0; + unsigned int ret = 0; + unsigned long val; + + dma_data = snd_soc_dai_get_dma_data(socdai, substream); + dma_data->addr_width = ch_num >> 3; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_MU_LAW: + case SNDRV_PCM_FORMAT_A_LAW: + case SNDRV_PCM_FORMAT_S16_LE: + ts_width = 1; + break; + default: + ts_width = 0; + dev_err(socdai->dev, "Unknown data format\n"); + return -EINVAL; + } + + val = zx_tdm_readl(tdm, REG_TIMING_CTRL); + val |= TIMING_TS_WIDTH(ts_width) | TIMING_TS_NUM(1); + zx_tdm_writel(tdm, REG_TIMING_CTRL, val); + zx_tdm_writel(tdm, REG_TS_MASK0, mask); + + if (tdm->master) + ret = clk_set_rate(tdm->dai_wclk, + params_rate(params) * TIMING_WIDTH_FACTOR * ch_num); + + return ret; +} + +static int zx_tdm_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); + struct zx_tdm_info *zx_tdm = dev_get_drvdata(dai->dev); + unsigned int val; + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + if (capture) { + val = zx_tdm_readl(zx_tdm, REG_RX_FIFO_CTRL); + val |= FIFOCTRL_RX_FIFO_RST; + zx_tdm_writel(zx_tdm, REG_RX_FIFO_CTRL, val); + + zx_tdm_rx_dma_en(zx_tdm, true); + } else { + val = zx_tdm_readl(zx_tdm, REG_TX_FIFO_CTRL); + val |= FIFOCTRL_TX_FIFO_RST; + zx_tdm_writel(zx_tdm, REG_TX_FIFO_CTRL, val); + + zx_tdm_tx_dma_en(zx_tdm, true); + } + break; + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + if (capture) + zx_tdm_rx_en(zx_tdm, true); + else + zx_tdm_tx_en(zx_tdm, true); + break; + case SNDRV_PCM_TRIGGER_STOP: + if (capture) + zx_tdm_rx_dma_en(zx_tdm, false); + else + zx_tdm_tx_dma_en(zx_tdm, false); + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (capture) + zx_tdm_rx_en(zx_tdm, false); + else + zx_tdm_tx_en(zx_tdm, false); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int zx_tdm_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct zx_tdm_info *zx_tdm = dev_get_drvdata(dai->dev); + int ret; + + ret = clk_prepare_enable(zx_tdm->dai_wclk); + if (ret) + return ret; + + ret = clk_prepare_enable(zx_tdm->dai_pclk); + if (ret) { + clk_disable_unprepare(zx_tdm->dai_wclk); + return ret; + } + + return 0; +} + +static void zx_tdm_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct zx_tdm_info *zx_tdm = dev_get_drvdata(dai->dev); + + clk_disable_unprepare(zx_tdm->dai_pclk); + clk_disable_unprepare(zx_tdm->dai_wclk); +} + +static struct snd_soc_dai_ops zx_tdm_dai_ops = { + .trigger = zx_tdm_trigger, + .hw_params = zx_tdm_hw_params, + .set_fmt = zx_tdm_set_fmt, + .startup = zx_tdm_startup, + .shutdown = zx_tdm_shutdown, +}; + +static const struct snd_soc_component_driver zx_tdm_component = { + .name = "zx-tdm", +}; + +static void zx_tdm_init_state(struct zx_tdm_info *tdm) +{ + unsigned int val; + + zx_tdm_writel(tdm, REG_PROCESS_CTRL, PROCESS_DISABLE_ALL); + + val = zx_tdm_readl(tdm, REG_TIMING_CTRL); + val |= TIMING_LSB_FIRST; + val &= ~TIMING_CLK_SEL_MASK; + val |= TIMING_CLK_SEL_DEF; + zx_tdm_writel(tdm, REG_TIMING_CTRL, val); + + zx_tdm_writel(tdm, REG_INT_EN, INT_DISABLE_ALL); + /* + * write INT_STATUS register to clear it. + */ + zx_tdm_writel(tdm, REG_INT_STATUS, INT_STATUS_MASK); + zx_tdm_writel(tdm, REG_RX_FIFO_CTRL, FIFOCTRL_RX_FIFO_RST); + zx_tdm_writel(tdm, REG_TX_FIFO_CTRL, FIFOCTRL_TX_FIFO_RST); + + val = zx_tdm_readl(tdm, REG_RX_FIFO_CTRL); + val &= ~(RXTH_MASK | RX_FIFO_RST_MASK); + val |= FIFOCTRL_THRESHOLD(8); + zx_tdm_writel(tdm, REG_RX_FIFO_CTRL, val); + + val = zx_tdm_readl(tdm, REG_TX_FIFO_CTRL); + val &= ~(TXTH_MASK | TX_FIFO_RST_MASK); + val |= FIFOCTRL_THRESHOLD(8); + zx_tdm_writel(tdm, REG_TX_FIFO_CTRL, val); +} + +static struct snd_soc_dai_driver zx_tdm_dai = { + .name = "zx-tdm-dai", + .id = 0, + .probe = zx_tdm_dai_probe, + .playback = { + .channels_min = 1, + .channels_max = 4, + .rates = ZX_TDM_RATES, + .formats = ZX_TDM_FMTBIT, + }, + .capture = { + .channels_min = 1, + .channels_max = 4, + .rates = ZX_TDM_RATES, + .formats = ZX_TDM_FMTBIT, + }, + .ops = &zx_tdm_dai_ops, +}; + +static int zx_tdm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct of_phandle_args out_args; + unsigned int dma_reg_offset; + struct zx_tdm_info *zx_tdm; + unsigned int dma_mask; + struct resource *res; + struct regmap *regmap_sysctrl; + int ret; + + zx_tdm = devm_kzalloc(&pdev->dev, sizeof(*zx_tdm), GFP_KERNEL); + if (!zx_tdm) + return -ENOMEM; + + zx_tdm->dev = dev; + + zx_tdm->dai_wclk = devm_clk_get(&pdev->dev, "wclk"); + if (IS_ERR(zx_tdm->dai_wclk)) { + dev_err(&pdev->dev, "Fail to get wclk\n"); + return PTR_ERR(zx_tdm->dai_wclk); + } + + zx_tdm->dai_pclk = devm_clk_get(&pdev->dev, "pclk"); + if (IS_ERR(zx_tdm->dai_pclk)) { + dev_err(&pdev->dev, "Fail to get pclk\n"); + return PTR_ERR(zx_tdm->dai_pclk); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + zx_tdm->phy_addr = res->start; + zx_tdm->regbase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(zx_tdm->regbase)) + return PTR_ERR(zx_tdm->regbase); + + ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node, + "zte,tdm-dma-sysctrl", 2, 0, &out_args); + if (ret) { + dev_err(&pdev->dev, "Fail to get zte,tdm-dma-sysctrl\n"); + return ret; + } + + dma_reg_offset = out_args.args[0]; + dma_mask = out_args.args[1]; + regmap_sysctrl = syscon_node_to_regmap(out_args.np); + if (IS_ERR(regmap_sysctrl)) { + of_node_put(out_args.np); + return PTR_ERR(regmap_sysctrl); + } + + regmap_update_bits(regmap_sysctrl, dma_reg_offset, dma_mask, dma_mask); + of_node_put(out_args.np); + + zx_tdm_init_state(zx_tdm); + platform_set_drvdata(pdev, zx_tdm); + + ret = devm_snd_soc_register_component(&pdev->dev, &zx_tdm_component, + &zx_tdm_dai, 1); + if (ret) { + dev_err(&pdev->dev, "Register DAI failed: %d\n", ret); + return ret; + } + + ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); + if (ret) + dev_err(&pdev->dev, "Register platform PCM failed: %d\n", ret); + + return ret; +} + +static const struct of_device_id zx_tdm_dt_ids[] = { + { .compatible = "zte,zx296718-tdm", }, + {} +}; +MODULE_DEVICE_TABLE(of, zx_tdm_dt_ids); + +static struct platform_driver tdm_driver = { + .probe = zx_tdm_probe, + .driver = { + .name = "zx-tdm", + .of_match_table = zx_tdm_dt_ids, + }, +}; +module_platform_driver(tdm_driver); + +MODULE_AUTHOR("Baoyou Xie baoyou.xie@linaro.org"); +MODULE_DESCRIPTION("ZTE TDM DAI driver"); +MODULE_LICENSE("GPL v2");

The patch

ASoC: zx-tdm: add bindings doc for zte's tdm controller

has been applied to the asoc tree at

git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From 5949dae3a4512fa1ca61eac947c349442acc12b0 Mon Sep 17 00:00:00 2001

From: Baoyou Xie baoyou.xie@linaro.org Date: Thu, 16 Feb 2017 19:05:04 +0800 Subject: [PATCH] ASoC: zx-tdm: add bindings doc for zte's tdm controller

This patch adds dt-binding documentation for zte's tdm controller.

Signed-off-by: Baoyou Xie baoyou.xie@linaro.org Reviewed-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Mark Brown broonie@kernel.org --- .../devicetree/bindings/sound/zte,tdm.txt | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/zte,tdm.txt

diff --git a/Documentation/devicetree/bindings/sound/zte,tdm.txt b/Documentation/devicetree/bindings/sound/zte,tdm.txt new file mode 100644 index 000000000000..2a07ca655264 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/zte,tdm.txt @@ -0,0 +1,30 @@ +ZTE TDM DAI driver + +Required properties: + +- compatible : should be one of the following. + * zte,zx296718-tdm +- reg : physical base address of the controller and length of memory mapped + region. +- clocks : Pairs of phandle and specifier referencing the controller's clocks. +- clock-names: "wclk" for the wclk. + "pclk" for the pclk. +-#clock-cells: should be 1. +- zte,tdm-dma-sysctrl : Reference to the sysctrl controller controlling + the dma. includes: + phandle of sysctrl. + register offset in sysctrl for control dma. + mask of the register that be written to sysctrl. + +Example: + + tdm: tdm@1487000 { + compatible = "zte,zx296718-tdm"; + reg = <0x01487000 0x1000>; + clocks = <&audiocrm AUDIO_TDM_WCLK>, <&audiocrm AUDIO_TDM_PCLK>; + clock-names = "wclk", "pclk"; + #clock-cells = <1>; + pinctrl-names = "default"; + pinctrl-0 = <&tdm_global_pin>; + zte,tdm-dma-sysctrl = <&sysctrl 0x10c 4>; + };