Add binding schema for MCA I2S transceiver found on Apple M1 and other chips.

Signed-off-by: Martin Povišer povik+lin@cutebit.org --- .../devicetree/bindings/sound/apple,mca.yaml | 102 ++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/apple,mca.yaml

diff --git a/Documentation/devicetree/bindings/sound/apple,mca.yaml b/Documentation/devicetree/bindings/sound/apple,mca.yaml new file mode 100644 index 000000000000..c8a36d8c38ad --- /dev/null +++ b/Documentation/devicetree/bindings/sound/apple,mca.yaml @@ -0,0 +1,102 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/apple,mca.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple MCA I2S transceiver + +description: | + MCA is an I2S transceiver peripheral found on M1 and other Apple chips. It is + composed of a number of identical clusters which can operate independently + or in an interlinked fashion. Up to 6 clusters have been seen on an MCA. + +maintainers: + - Martin Povišer povik+lin@cutebit.org + +properties: + compatible: + items: + - enum: + - apple,t8103-mca + - apple,t6000-mca + - const: apple,mca + + reg: + minItems: 2 + maxItems: 2 + + interrupts: + maxItems: 6 + description: | + One interrupt per each cluster + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + dmas: + minItems: 16 + maxItems: 24 + description: | + DMA channels associated to the SERDES units within the peripheral. They + are listed in groups of four per cluster, and within the cluster they are + given in order TXA, RXA, TXB, RXB of the respective SERDES units. + + dma-names: + minItems: 16 + maxItems: 24 + description: | + Names for the DMA channels: 'tx'/'rx', then cluster number, then 'a'/'b' + based on the associated SERDES unit. + + clocks: + minItems: 4 + maxItems: 6 + description: | + Clusters' input reference clock. + + power-domains: + minItems: 5 + maxItems: 7 + description: | + First the overall power domain for register access, then the power + domains of individual clusters for their operation. + + "#sound-dai-cells": + const: 1 + +required: + - compatible + - reg + - dmas + - dma-names + - clocks + - power-domains + - '#sound-dai-cells' + +additionalProperties: false + +examples: + - | + mca: mca@9b600000 { + compatible = "apple,t6000-mca", "apple,mca"; + reg = <0x9b600000 0x10000>, + <0x9b500000 0x20000>; + + clocks = <&nco 0>, <&nco 1>, <&nco 2>, <&nco 3>; + power-domains = <&ps_audio_p>, <&ps_mca0>, <&ps_mca1>, + <&ps_mca2>, <&ps_mca3>; + dmas = <&admac 0>, <&admac 1>, <&admac 2>, <&admac 3>, + <&admac 4>, <&admac 5>, <&admac 6>, <&admac 7>, + <&admac 8>, <&admac 9>, <&admac 10>, <&admac 11>, + <&admac 12>, <&admac 13>, <&admac 14>, <&admac 15>; + dma-names = "tx0a", "rx0a", "tx0b", "rx0b", + "tx1a", "rx1a", "tx1b", "rx1b", + "tx2a", "rx2a", "tx2b", "rx2b", + "tx3a", "rx3a", "tx3b", "rx3b"; + + #sound-dai-cells = <1>; + };

Add ASoC platform driver for the MCA peripheral found on Apple M1 and other chips.

Signed-off-by: Martin Povišer povik+lin@cutebit.org --- sound/soc/Kconfig | 1 + sound/soc/Makefile | 1 + sound/soc/apple/Kconfig | 9 + sound/soc/apple/Makefile | 3 + sound/soc/apple/mca.c | 1122 ++++++++++++++++++++++++++++++++++++++ 5 files changed, 1136 insertions(+) create mode 100644 sound/soc/apple/Kconfig create mode 100644 sound/soc/apple/Makefile create mode 100644 sound/soc/apple/mca.c

diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig index 5dcf77af07af..aec82db3114b 100644 --- a/sound/soc/Kconfig +++ b/sound/soc/Kconfig @@ -61,6 +61,7 @@ config SND_SOC_ACPI # All the supported SoCs source "sound/soc/adi/Kconfig" source "sound/soc/amd/Kconfig" +source "sound/soc/apple/Kconfig" source "sound/soc/atmel/Kconfig" source "sound/soc/au1x/Kconfig" source "sound/soc/bcm/Kconfig" diff --git a/sound/soc/Makefile b/sound/soc/Makefile index a7b37c06dc43..706dfbc28a6d 100644 --- a/sound/soc/Makefile +++ b/sound/soc/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_SND_SOC_ACPI) += snd-soc-acpi.o obj-$(CONFIG_SND_SOC) += snd-soc-core.o obj-$(CONFIG_SND_SOC) += codecs/ obj-$(CONFIG_SND_SOC) += generic/ +obj-$(CONFIG_SND_SOC) += apple/ obj-$(CONFIG_SND_SOC) += adi/ obj-$(CONFIG_SND_SOC) += amd/ obj-$(CONFIG_SND_SOC) += atmel/ diff --git a/sound/soc/apple/Kconfig b/sound/soc/apple/Kconfig new file mode 100644 index 000000000000..0ba955657e98 --- /dev/null +++ b/sound/soc/apple/Kconfig @@ -0,0 +1,9 @@ +config SND_SOC_APPLE_MCA + tristate "Apple Silicon MCA driver" + depends on ARCH_APPLE || COMPILE_TEST + select SND_DMAENGINE_PCM + select COMMON_CLK + default ARCH_APPLE + help + This option enables an ASoC platform driver for MCA peripherals found + on Apple Silicon SoCs. diff --git a/sound/soc/apple/Makefile b/sound/soc/apple/Makefile new file mode 100644 index 000000000000..7a30bf452817 --- /dev/null +++ b/sound/soc/apple/Makefile @@ -0,0 +1,3 @@ +snd-soc-apple-mca-objs := mca.o + +obj-$(CONFIG_SND_SOC_APPLE_MCA) += snd-soc-apple-mca.o diff --git a/sound/soc/apple/mca.c b/sound/soc/apple/mca.c new file mode 100644 index 000000000000..c53c9367efa5 --- /dev/null +++ b/sound/soc/apple/mca.c @@ -0,0 +1,1122 @@ +/* + * Apple SoCs MCA driver + * + * Copyright (C) The Asahi Linux Contributors + * + * The MCA peripheral is made up of a number of identical units called clusters. + * Each cluster has its separate clock parent, SYNC signal generator, carries + * four SERDES units and has a dedicated I2S port on the SoC's periphery. + * + * The clusters can operate independently, or can be combined together in a + * configurable manner. We mostly treat them as self-contained independent + * units and don't configure any cross-cluster connections except for the I2S + * ports. The I2S ports can be routed to any of the clusters (irrespective + * of their native cluster). We map this onto ASoC's (DPCM) notion of backend + * and frontend DAIs. The 'cluster guts' are frontends which are dynamically + * routed to backend I2S ports. + * + * DAI references in devicetree are resolved as backends. The machine driver + * makes up some routing to the frontends in the DAPM paths it supplies, which + * can mostly be arbitrary. + */ + +#include <linux/clk.h> +#include <linux/dma-mapping.h> +#include <linux/init.h> +#include <linux/bitfield.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_clk.h> +#include <linux/of_dma.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/slab.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/dmaengine_pcm.h> + +#define USE_RXB_FOR_CAPTURE + +/* relative to cluster base */ +#define REG_STATUS 0x0 +#define STATUS_MCLK_EN BIT(0) +#define REG_MCLK_CONF 0x4 +#define MCLK_CONF_DIV GENMASK(11, 8) + +#define REG_SYNCGEN_STATUS 0x100 +#define SYNCGEN_STATUS_EN BIT(0) +#define REG_SYNCGEN_MCLK_SEL 0x104 +#define SYNCGEN_MCLK_SEL GENMASK(3, 0) +#define REG_SYNCGEN_HI_PERIOD 0x108 +#define REG_SYNCGEN_LO_PERIOD 0x10c + +#define REG_PORT_ENABLES 0x600 +#define PORT_ENABLES_CLOCKS GENMASK(2, 1) +#define PORT_ENABLES_TX_DATA BIT(3) +#define REG_PORT_CLOCK_SEL 0x604 +#define PORT_CLOCK_SEL GENMASK(11, 8) +#define REG_PORT_DATA_SEL 0x608 +#define PORT_DATA_SEL_TXA(cl) (1 << ((cl)*2)) +#define PORT_DATA_SEL_TXB(cl) (2 << ((cl)*2)) + +#define REG_INTSTATE 0x700 +#define REG_INTMASK 0x704 + +/* bases of serdes units (relative to cluster) */ +#define CLUSTER_RXA_OFF 0x200 +#define CLUSTER_TXA_OFF 0x300 +#define CLUSTER_RXB_OFF 0x400 +#define CLUSTER_TXB_OFF 0x500 + +#define CLUSTER_TX_OFF CLUSTER_TXA_OFF + +#ifndef USE_RXB_FOR_CAPTURE +#define CLUSTER_RX_OFF CLUSTER_RXA_OFF +#else +#define CLUSTER_RX_OFF CLUSTER_RXB_OFF +#endif + +/* relative to serdes unit base */ +#define REG_SERDES_STATUS 0x00 +#define SERDES_STATUS_EN BIT(0) +#define SERDES_STATUS_RST BIT(1) +#define REG_TX_SERDES_CONF 0x04 +#define REG_RX_SERDES_CONF 0x08 +#define SERDES_CONF_NCHANS GENMASK(3, 0) +#define SERDES_CONF_WIDTH_MASK GENMASK(8, 4) +#define SERDES_CONF_WIDTH_16BIT 0x40 +#define SERDES_CONF_WIDTH_20BIT 0x80 +#define SERDES_CONF_WIDTH_24BIT 0xc0 +#define SERDES_CONF_WIDTH_32BIT 0x100 +#define SERDES_CONF_BCLK_POL 0x400 +#define SERDES_CONF_LSB_FIRST 0x800 +#define SERDES_CONF_UNK1 BIT(12) +#define SERDES_CONF_UNK2 BIT(13) +#define SERDES_CONF_UNK3 BIT(14) +#define SERDES_CONF_NO_DATA_FEEDBACK BIT(14) +#define SERDES_CONF_SYNC_SEL GENMASK(18, 16) +#define SERDES_CONF_SOME_RST BIT(19) +#define REG_TX_SERDES_BITSTART 0x08 +#define REG_RX_SERDES_BITSTART 0x0c +#define REG_TX_SERDES_SLOTMASK 0x0c +#define REG_RX_SERDES_SLOTMASK 0x10 +#define REG_RX_SERDES_PORT 0x04 + +/* relative to switch base */ +#define REG_DMA_ADAPTER_A(cl) (0x8000 * (cl)) +#define REG_DMA_ADAPTER_B(cl) (0x8000 * (cl) + 0x4000) +#define DMA_ADAPTER_TX_LSB_PAD GENMASK(4, 0) +#define DMA_ADAPTER_TX_NCHANS GENMASK(6, 5) +#define DMA_ADAPTER_RX_MSB_PAD GENMASK(12, 8) +#define DMA_ADAPTER_RX_NCHANS GENMASK(14, 13) +#define DMA_ADAPTER_NCHANS GENMASK(22, 20) + +#define SWITCH_STRIDE 0x8000 +#define CLUSTER_STRIDE 0x4000 + +#define MAX_NCLUSTERS 6 + +#define APPLE_MCA_FMTBITS (SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_S32_LE) + +struct mca_cluster { + int no; + __iomem void *base; + struct mca_data *host; + struct device *pd_dev; + struct clk *clk_parent; + struct dma_chan *dma_chans[SNDRV_PCM_STREAM_LAST + 1]; + + bool port_started[SNDRV_PCM_STREAM_LAST + 1]; + int port_driver; + bool clocks_in_use[SNDRV_PCM_STREAM_LAST + 1]; + struct device_link *pd_link; + + unsigned int set_sysclk; + + int tdm_slots; + int tdm_slot_width; + unsigned int tdm_tx_mask; + unsigned int tdm_rx_mask; +}; + +struct mca_data { + struct device *dev; + + __iomem void *switch_base; + + struct device *pd_dev; + struct device_link *pd_link; + + int nclusters; + struct mca_cluster clusters[]; +}; + +static void mca_modify(struct mca_cluster *cl, int regoffset, + u32 mask, u32 val) +{ + __iomem void *ptr = cl->base + regoffset; + u32 newval; + + newval = (val & mask) | (readl_relaxed(ptr) & ~mask); + writel_relaxed(newval, ptr); +} + +/* + * Get the cluster of FE or BE DAI + */ +static struct mca_cluster *mca_dai_to_cluster(struct snd_soc_dai *dai) +{ + struct mca_data *mca = snd_soc_dai_get_drvdata(dai); + /* + * FE DAIs are 0 ... nclusters - 1 + * BE DAIs are nclusters ... 2*nclusters - 1 + */ + int cluster_no = dai->id % mca->nclusters; + + return &mca->clusters[cluster_no]; +} + +/* called before PCM trigger */ +static void mca_fe_early_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + bool is_tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int serdes_unit = is_tx ? CLUSTER_TX_OFF : CLUSTER_RX_OFF; + int serdes_conf = serdes_unit + (is_tx ? REG_TX_SERDES_CONF : REG_RX_SERDES_CONF); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + mca_modify(cl, serdes_unit + REG_SERDES_STATUS, + SERDES_STATUS_EN | SERDES_STATUS_RST, + SERDES_STATUS_RST); + mca_modify(cl, serdes_conf, + SERDES_CONF_SOME_RST, SERDES_CONF_SOME_RST); + (void) readl_relaxed(cl->base + serdes_conf); + mca_modify(cl, serdes_conf, + SERDES_STATUS_RST, 0); + WARN_ON(readl_relaxed(cl->base + REG_SERDES_STATUS) + & SERDES_STATUS_RST); + break; + default: + break; + } +} + +static int mca_fe_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + bool is_tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int serdes_unit = is_tx ? CLUSTER_TX_OFF : CLUSTER_RX_OFF; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + mca_modify(cl, serdes_unit + REG_SERDES_STATUS, + SERDES_STATUS_EN | SERDES_STATUS_RST, + SERDES_STATUS_EN); + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + mca_modify(cl, serdes_unit + REG_SERDES_STATUS, + SERDES_STATUS_EN, 0); + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int mca_fe_enable_clocks(struct mca_cluster *cl) +{ + struct mca_data *mca = cl->host; + int ret; + + ret = clk_prepare_enable(cl->clk_parent); + if (ret) { + dev_err(mca->dev, "cluster %d: unable to enable clock parent: %d\n", + cl->no, ret); + return ret; + } + + cl->pd_link = device_link_add(mca->dev, cl->pd_dev, + DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME | + DL_FLAG_RPM_ACTIVE); + if (!cl->pd_link) { + dev_err(mca->dev, "cluster %d: unable to prop-up power domain\n", + cl->no); + clk_disable_unprepare(cl->clk_parent); + return -EINVAL; + } + + writel_relaxed(cl->no + 1, + cl->base + REG_SYNCGEN_MCLK_SEL); + mca_modify(cl, REG_SYNCGEN_STATUS, + SYNCGEN_STATUS_EN, SYNCGEN_STATUS_EN); + mca_modify(cl, REG_STATUS, + STATUS_MCLK_EN, STATUS_MCLK_EN); + + return 0; +} + +static void mca_fe_disable_clocks(struct mca_cluster *cl) +{ + mca_modify(cl, REG_SYNCGEN_STATUS, + SYNCGEN_STATUS_EN, 0); + mca_modify(cl, REG_STATUS, + STATUS_MCLK_EN, 0); + + device_link_del(cl->pd_link); + clk_disable_unprepare(cl->clk_parent); +} + +static bool mca_fe_clocks_in_use(struct mca_cluster *cl) +{ + struct mca_data *mca = cl->host; + struct mca_cluster *be_cl; + int stream, i; + + for (i = 0; i < mca->nclusters; i++) { + be_cl = &mca->clusters[i]; + + if (be_cl->port_driver != cl->no) + continue; + + for_each_pcm_streams(stream) + if (be_cl->clocks_in_use[stream]) + return true; + } + return false; +} + +static int mca_be_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + struct mca_data *mca = cl->host; + struct mca_cluster *fe_cl; + int ret; + + if (cl->port_driver < 0) + return -EINVAL; + + fe_cl = &mca->clusters[cl->port_driver]; + + /* + * Codecs require clocks at time of umute with the 'mute_stream' op. + * We need to enable them here at the latest (frontend prepare would + * be too late). + */ + if (!mca_fe_clocks_in_use(fe_cl)) { + ret = mca_fe_enable_clocks(fe_cl); + if (ret < 0) + return ret; + } + + cl->clocks_in_use[substream->stream] = true; + + return 0; +} + +static int mca_be_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + struct mca_data *mca = cl->host; + struct mca_cluster *fe_cl; + + if (cl->port_driver < 0) + return -EINVAL; + + fe_cl = &mca->clusters[cl->port_driver]; + if (!mca_fe_clocks_in_use(fe_cl)) + return 0; /* Nothing to do */ + + cl->clocks_in_use[substream->stream] = false; + + if (!mca_fe_clocks_in_use(fe_cl)) + mca_fe_disable_clocks(fe_cl); + + return 0; +} + +static unsigned int mca_crop_mask(unsigned int mask, int nchans) +{ + while (hweight32(mask) > nchans) + mask &= ~(1 << __fls(mask)); + + return mask; +} + +static int mca_configure_serdes(struct mca_cluster *cl, int serdes_unit, + unsigned int mask, int slots, int nchans, int slot_width, + bool is_tx, int port) +{ + u32 serdes_conf, serdes_conf_mask; + + serdes_conf_mask = SERDES_CONF_WIDTH_MASK | SERDES_CONF_NCHANS; + serdes_conf = FIELD_PREP(SERDES_CONF_NCHANS, max(slots, 1) - 1); + switch (slot_width) { + case 16: + serdes_conf |= SERDES_CONF_WIDTH_16BIT; + break; + case 20: + serdes_conf |= SERDES_CONF_WIDTH_20BIT; + break; + case 24: + serdes_conf |= SERDES_CONF_WIDTH_24BIT; + break; + case 32: + serdes_conf |= SERDES_CONF_WIDTH_32BIT; + break; + default: + goto err; + } + + serdes_conf_mask |= SERDES_CONF_SYNC_SEL; + serdes_conf |= FIELD_PREP(SERDES_CONF_SYNC_SEL, cl->no + 1); + + if (is_tx) { + serdes_conf_mask |= SERDES_CONF_UNK1 | SERDES_CONF_UNK2 | SERDES_CONF_UNK3; + serdes_conf |= SERDES_CONF_UNK1 | SERDES_CONF_UNK2 | SERDES_CONF_UNK3; + } else { + + serdes_conf_mask |= SERDES_CONF_UNK1 | SERDES_CONF_UNK2 | SERDES_CONF_UNK3 + | SERDES_CONF_NO_DATA_FEEDBACK; + serdes_conf |= SERDES_CONF_UNK1 | SERDES_CONF_UNK2 + | SERDES_CONF_NO_DATA_FEEDBACK; + } + + mca_modify(cl, serdes_unit + (is_tx ? REG_TX_SERDES_CONF : REG_RX_SERDES_CONF), + serdes_conf_mask, serdes_conf); + + if (is_tx) { + writel_relaxed(0xffffffff, + cl->base + serdes_unit + REG_TX_SERDES_SLOTMASK); + writel_relaxed(~((u32) mca_crop_mask(mask, nchans)), + cl->base + serdes_unit + REG_TX_SERDES_SLOTMASK + 0x4); + writel_relaxed(0xffffffff, + cl->base + serdes_unit + REG_TX_SERDES_SLOTMASK + 0x8); + writel_relaxed(~((u32) mask), + cl->base + serdes_unit + REG_TX_SERDES_SLOTMASK + 0xc); + } else { + writel_relaxed(0xffffffff, + cl->base + serdes_unit + REG_RX_SERDES_SLOTMASK); + writel_relaxed(~((u32) mask), + cl->base + serdes_unit + REG_RX_SERDES_SLOTMASK + 0x4); + writel_relaxed(1 << port, + cl->base + serdes_unit + REG_RX_SERDES_PORT); + } + + return 0; + +err: + dev_err(cl->host->dev, "unsupported SERDES configuration requested (mask=0x%x slots=%d slot_width=%d)\n", + mask, slots, slot_width); + return -EINVAL; +} + +static int mca_fe_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, + unsigned int rx_mask, int slots, int slot_width) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + + cl->tdm_slots = slots; + cl->tdm_slot_width = slot_width; + cl->tdm_tx_mask = tx_mask; + cl->tdm_rx_mask = rx_mask; + + return 0; +} + +static int mca_fe_set_fmt(struct snd_soc_dai *dai, + unsigned int fmt) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + struct mca_data *mca = cl->host; + bool fpol_inv = false; + u32 serdes_conf = 0; + u32 bitstart; + + if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != + SND_SOC_DAIFMT_CBC_CFC) + goto err; + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + fpol_inv = 0; + bitstart = 1; + break; + case SND_SOC_DAIFMT_LEFT_J: + fpol_inv = 1; + bitstart = 0; + break; + default: + goto err; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_IF: + case SND_SOC_DAIFMT_IB_IF: + fpol_inv ^= 1; + break; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + case SND_SOC_DAIFMT_NB_IF: + serdes_conf |= SERDES_CONF_BCLK_POL; + break; + } + + if (!fpol_inv) + goto err; + + mca_modify(cl, CLUSTER_TX_OFF + REG_TX_SERDES_CONF, + SERDES_CONF_BCLK_POL, + serdes_conf); + writel_relaxed(bitstart, + cl->base + CLUSTER_TX_OFF + REG_TX_SERDES_BITSTART); + mca_modify(cl, CLUSTER_RX_OFF + REG_RX_SERDES_CONF, + SERDES_CONF_BCLK_POL, + serdes_conf); + writel_relaxed(bitstart, + cl->base + CLUSTER_RX_OFF + REG_RX_SERDES_BITSTART); + + return 0; + +err: + dev_err(mca->dev, "unsupported DAI format (0x%x) requested\n", fmt); + return -EINVAL; +} + +static int mca_fe_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + int ret; + + if (freq == cl->set_sysclk) + return 0; + + if (mca_fe_clocks_in_use(cl)) + return -EBUSY; + + ret = clk_set_rate(cl->clk_parent, freq); + if (!ret) + cl->set_sysclk = freq; + return ret; +} + +static int mca_fe_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + struct mca_data *mca = cl->host; + struct device *dev = mca->dev; + unsigned int samp_rate = params_rate(params); + bool is_tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + bool refine_tdm = false; + unsigned long bclk_ratio; + unsigned int tdm_slots, tdm_slot_width, tdm_mask; + u32 regval, pad; + int ret, nchans_ceiled; + + if (!cl->tdm_slot_width) { + /* + * We were not given TDM settings from above, set initial + * guesses which will later be refined. + */ + tdm_slot_width = params_width(params); + tdm_slots = params_channels(params); + refine_tdm = true; + } else { + tdm_slot_width = cl->tdm_slot_width; + tdm_slots = cl->tdm_slots; + tdm_mask = is_tx ? cl->tdm_tx_mask : cl->tdm_rx_mask; + } + + if (cl->set_sysclk) + bclk_ratio = cl->set_sysclk / samp_rate; + else + bclk_ratio = tdm_slot_width * tdm_slots; + + if (refine_tdm) { + int nchannels = params_channels(params); + + if (nchannels > 2) { + dev_err(dev, "missing TDM for stream with over two channels\n"); + return -EINVAL; + } + + if ((bclk_ratio % nchannels) != 0) { + dev_err(dev, "BCLK ratio (%ld) not divisible by no of channels (%d)\n", + bclk_ratio, nchannels); + return -EINVAL; + } + + tdm_slot_width = bclk_ratio / nchannels; + + if (tdm_slot_width > 32 && nchannels == 1) + tdm_slot_width = 32; + + if (tdm_slot_width < params_width(params)) { + dev_err(dev, "TDM slots too narrow (tdm=%d params=%d)\n", + tdm_slot_width, params_width(params)); + return -EINVAL; + } + + tdm_mask = (1 << tdm_slots) - 1; + } + + ret = mca_configure_serdes(cl, is_tx ? CLUSTER_TX_OFF : CLUSTER_RX_OFF, + tdm_mask, tdm_slots, params_channels(params), + tdm_slot_width, is_tx, cl->no); + if (ret) + return ret; + + pad = 32 - params_width(params); + + /* + * TODO: Here the register semantics aren't clear. + */ + nchans_ceiled = min_t(int, params_channels(params), 4); + regval = FIELD_PREP(DMA_ADAPTER_NCHANS, nchans_ceiled) + | FIELD_PREP(DMA_ADAPTER_TX_NCHANS, 0x2) + | FIELD_PREP(DMA_ADAPTER_RX_NCHANS, 0x2) + | FIELD_PREP(DMA_ADAPTER_TX_LSB_PAD, pad) + | FIELD_PREP(DMA_ADAPTER_RX_MSB_PAD, pad); + +#ifndef USE_RXB_FOR_CAPTURE + writel_relaxed(regval, mca->switch_base + REG_DMA_ADAPTER_A(cl->no)); +#else + if (is_tx) + writel_relaxed(regval, mca->switch_base + REG_DMA_ADAPTER_A(cl->no)); + else + writel_relaxed(regval, mca->switch_base + REG_DMA_ADAPTER_B(cl->no)); +#endif + + if (!mca_fe_clocks_in_use(cl)) { + /* + * Set up FSYNC duty cycle as even as possible. + */ + writel_relaxed((bclk_ratio / 2) - 1, cl->base + REG_SYNCGEN_HI_PERIOD); + writel_relaxed(((bclk_ratio + 1) / 2) - 1, cl->base + REG_SYNCGEN_LO_PERIOD); + writel_relaxed(FIELD_PREP(MCLK_CONF_DIV, 0x1), cl->base + REG_MCLK_CONF); + + ret = clk_set_rate(cl->clk_parent, bclk_ratio * samp_rate); + if (ret) { + dev_err(mca->dev, "cluster %d: unable to set clock parent: %d\n", + cl->no, ret); + return ret; + } + } + + return 0; +} + + +static const struct snd_soc_dai_ops mca_fe_ops = { + .set_fmt = mca_fe_set_fmt, + .set_sysclk = mca_fe_set_sysclk, + .set_tdm_slot = mca_fe_set_tdm_slot, + .hw_params = mca_fe_hw_params, + .trigger = mca_fe_trigger, +}; + +static bool mca_be_started(struct mca_cluster *cl) +{ + int stream; + + for_each_pcm_streams(stream) + if (cl->port_started[stream]) + return true; + return false; +} + +static int mca_be_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *be = asoc_substream_to_rtd(substream); + struct snd_soc_pcm_runtime *fe; + struct mca_cluster *cl = mca_dai_to_cluster(dai); + struct mca_cluster *fe_cl; + struct mca_data *mca = cl->host; + struct snd_soc_dpcm *dpcm; + + fe = NULL; + + for_each_dpcm_fe(be, substream->stream, dpcm) { + if (fe && dpcm->fe != fe) { + dev_err(mca->dev, "many FE per one BE unsupported\n"); + return -EINVAL; + } + + fe = dpcm->fe; + } + + if (!fe) + return -EINVAL; + + fe_cl = mca_dai_to_cluster(asoc_rtd_to_cpu(fe, 0)); + + if (mca_be_started(cl)) { + /* + * Port is already started in the other direction. + * Check it isn't driven from different cluster. + */ + if (fe_cl->no != cl->port_driver) + return -EINVAL; + + cl->port_started[substream->stream] = true; + return 0; + } + + writel_relaxed(PORT_ENABLES_CLOCKS | PORT_ENABLES_TX_DATA, + cl->base + REG_PORT_ENABLES); + writel_relaxed(FIELD_PREP(PORT_CLOCK_SEL, fe_cl->no + 1), + cl->base + REG_PORT_CLOCK_SEL); + writel_relaxed(PORT_DATA_SEL_TXA(fe_cl->no), + cl->base + REG_PORT_DATA_SEL); + cl->port_driver = fe_cl->no; + cl->port_started[substream->stream] = true; + + return 0; +} + +static void mca_be_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + + cl->port_started[substream->stream] = false; + + if (!mca_be_started(cl)) { + /* + * Were we the last direction to shutdown? + * Turn off the lights. + */ + writel_relaxed(0, cl->base + REG_PORT_ENABLES); + writel_relaxed(0, cl->base + REG_PORT_DATA_SEL); + cl->port_driver = -1; + } +} + +static const struct snd_soc_dai_ops mca_be_ops = { + .prepare = mca_be_prepare, + .hw_free = mca_be_hw_free, + .startup = mca_be_startup, + .shutdown = mca_be_shutdown, +}; + +static int mca_set_runtime_hwparams(struct snd_soc_component *component, + struct snd_pcm_substream *substream, struct dma_chan *chan) +{ + struct device *dma_dev = chan->device->dev; + struct snd_dmaengine_dai_dma_data dma_data = {}; + int ret; + + struct snd_pcm_hardware hw; + + memset(&hw, 0, sizeof(hw)); + + hw.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED; + hw.periods_min = 2; + hw.periods_max = UINT_MAX; + hw.period_bytes_min = 256; + hw.period_bytes_max = dma_get_max_seg_size(dma_dev); + hw.buffer_bytes_max = SIZE_MAX; + hw.fifo_size = 16; + + ret = snd_dmaengine_pcm_refine_runtime_hwparams(substream, + &dma_data, &hw, chan); + + if (ret) + return ret; + + return snd_soc_set_runtime_hwparams(substream, &hw); +} + +static int mca_pcm_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct mca_cluster *cl = mca_dai_to_cluster(asoc_rtd_to_cpu(rtd, 0)); + struct dma_chan *chan = cl->dma_chans[substream->stream]; + int ret; + + if (rtd->dai_link->no_pcm) + return 0; + + ret = mca_set_runtime_hwparams(component, substream, chan); + if (ret) + return ret; + + return snd_dmaengine_pcm_open(substream, chan); +} + +static int mca_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream); + struct dma_slave_config slave_config; + int ret; + + if (rtd->dai_link->no_pcm) + return 0; + + memset(&slave_config, 0, sizeof(slave_config)); + ret = snd_hwparams_to_dma_slave_config(substream, params, &slave_config); + if (ret < 0) + return ret; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + slave_config.dst_port_window_size = min_t(u32, params_channels(params), 4); + else + slave_config.src_port_window_size = min_t(u32, params_channels(params), 4); + + return dmaengine_slave_config(chan, &slave_config); +} + +static int mca_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + + if (rtd->dai_link->no_pcm) + return 0; + + return snd_dmaengine_pcm_close(substream); +} + +static int mca_trigger(struct snd_soc_component *component, + struct snd_pcm_substream *substream, int cmd) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + + if (rtd->dai_link->no_pcm) + return 0; + + /* + * Before we do the PCM trigger proper, insert an opportunity + * to reset the frontend's SERDES. + */ + mca_fe_early_trigger(substream, cmd, asoc_rtd_to_cpu(rtd, 0)); + + return snd_dmaengine_pcm_trigger(substream, cmd); +} + +static snd_pcm_uframes_t mca_pointer(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + + if (rtd->dai_link->no_pcm) + return -ENOTSUPP; + + return snd_dmaengine_pcm_pointer(substream); +} + +static int mca_pcm_new(struct snd_soc_component *component, + struct snd_soc_pcm_runtime *rtd) +{ + struct mca_cluster *cl = mca_dai_to_cluster(asoc_rtd_to_cpu(rtd, 0)); + unsigned int i; + + if (rtd->dai_link->no_pcm) + return 0; + + for_each_pcm_streams(i) { + struct snd_pcm_substream *substream = rtd->pcm->streams[i].substream; + struct dma_chan *chan = cl->dma_chans[i]; + + if (!substream) + continue; + + if (!chan) { + dev_err(component->dev, "missing DMA channel for stream %d on SERDES %d\n", + i, cl->no); + return -EINVAL; + } + + snd_pcm_set_managed_buffer(substream, SNDRV_DMA_TYPE_DEV_IRAM, + chan->device->dev, 512*1024*6, + SIZE_MAX); + } + + return 0; +} + +static const struct snd_soc_component_driver mca_component = { + .name = "apple-mca", + .open = mca_pcm_open, + .close = mca_close, + .hw_params = mca_hw_params, + .trigger = mca_trigger, + .pointer = mca_pointer, + .pcm_construct = mca_pcm_new, +}; + +static void apple_mca_release(struct mca_data *mca) +{ + int i, stream; + + for (i = 0; i < mca->nclusters; i++) { + struct mca_cluster *cl = &mca->clusters[i]; + + for_each_pcm_streams(stream) { + if (IS_ERR_OR_NULL(cl->dma_chans[stream])) + continue; + + dma_release_channel(cl->dma_chans[stream]); + } + + if (!IS_ERR_OR_NULL(cl->clk_parent)) + clk_put(cl->clk_parent); + + if (!IS_ERR_OR_NULL(cl->pd_dev)) + dev_pm_domain_detach(cl->pd_dev, true); + } + + if (mca->pd_link) + device_link_del(mca->pd_link); + + if (!IS_ERR_OR_NULL(mca->pd_dev)) + dev_pm_domain_detach(mca->pd_dev, true); +} + +static int apple_mca_probe(struct platform_device *pdev) +{ + struct mca_data *mca; + struct mca_cluster *clusters; + struct snd_soc_dai_driver *dai_drivers; + struct resource *res; + void __iomem *base; + int nclusters; + int ret, i; + + base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(base)) + return PTR_ERR(base); + + if (resource_size(res) < CLUSTER_STRIDE) + return -EINVAL; + nclusters = (resource_size(res) - CLUSTER_STRIDE) / CLUSTER_STRIDE + 1; + + mca = devm_kzalloc(&pdev->dev, struct_size(mca, clusters, nclusters), + GFP_KERNEL); + if (!mca) + return -ENOMEM; + mca->dev = &pdev->dev; + mca->nclusters = nclusters; + platform_set_drvdata(pdev, mca); + clusters = mca->clusters; + + mca->switch_base = devm_platform_ioremap_resource_byname(pdev, "switch"); + if (IS_ERR(mca->switch_base)) + return PTR_ERR(mca->switch_base); + + { + /* + * TODO: The only reset domain which seems to have an effect is + * AUDIO_P, which is shared with ADMAC (at minimum) and so can only + * be triggered non-exclusively. + */ + struct reset_control *rst; + + rst = of_reset_control_array_get(pdev->dev.of_node, true, true, false); + if (IS_ERR(rst)) { + dev_err(&pdev->dev, "unable to obtain reset control: %ld\n", + PTR_ERR(rst)); + } else if (rst) { + reset_control_reset(rst); + reset_control_put(rst); + } + } + + dai_drivers = devm_kzalloc(&pdev->dev, sizeof(*dai_drivers) * 2 * nclusters, + GFP_KERNEL); + if (!dai_drivers) + return -ENOMEM; + + mca->pd_dev = dev_pm_domain_attach_by_id(&pdev->dev, 0); + if (IS_ERR(mca->pd_dev)) + return -EINVAL; + + /* + * TODO: need cleanup? + */ + mca->pd_link = device_link_add(&pdev->dev, mca->pd_dev, + DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME | + DL_FLAG_RPM_ACTIVE); + if (!mca->pd_link) { + ret = -EINVAL; + goto err_release; + } + + for (i = 0; i < nclusters; i++) { + struct mca_cluster *cl = &clusters[i]; + struct snd_soc_dai_driver *fe = &dai_drivers[mca->nclusters + i]; + struct snd_soc_dai_driver *be = &dai_drivers[i]; + int stream; + + cl->host = mca; + cl->no = i; + cl->base = base + CLUSTER_STRIDE * i; + cl->port_driver = -1; + cl->clk_parent = of_clk_get(pdev->dev.of_node, i); + if (IS_ERR(cl->clk_parent)) { + dev_err(&pdev->dev, "unable to obtain clock %d: %ld\n", + i, PTR_ERR(cl->clk_parent)); + ret = PTR_ERR(cl->clk_parent); + goto err_release; + } + cl->pd_dev = dev_pm_domain_attach_by_id(&pdev->dev, i + 1); + if (IS_ERR(cl->pd_dev)) { + dev_err(&pdev->dev, "unable to obtain cluster %d PD: %ld\n", + i, PTR_ERR(cl->pd_dev)); + ret = PTR_ERR(cl->pd_dev); + goto err_release; + } + + for_each_pcm_streams(stream) { + struct dma_chan *chan; + bool is_tx = (stream == SNDRV_PCM_STREAM_PLAYBACK); +#ifndef USE_RXB_FOR_CAPTURE + char *name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + is_tx ? "tx%da" : "rx%da", i); +#else + char *name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + is_tx ? "tx%da" : "rx%db", i); +#endif + + chan = of_dma_request_slave_channel(pdev->dev.of_node, name); + if (IS_ERR(chan)) { + if (PTR_ERR(chan) != -EPROBE_DEFER) + dev_err(&pdev->dev, "no %s DMA channel: %ld\n", + name, PTR_ERR(chan)); + + ret = PTR_ERR(chan); + goto err_release; + } + + cl->dma_chans[stream] = chan; + } + + fe->id = i; + fe->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "mca-pcm-%d", i); + if (!fe->name) { + ret = -ENOMEM; + goto err_release; + } + fe->ops = &mca_fe_ops; + fe->playback.channels_min = 1; + fe->playback.channels_max = 32; + fe->playback.rates = SNDRV_PCM_RATE_8000_192000; + fe->playback.formats = APPLE_MCA_FMTBITS; + fe->capture.channels_min = 1; + fe->capture.channels_max = 32; + fe->capture.rates = SNDRV_PCM_RATE_8000_192000; + fe->capture.formats = APPLE_MCA_FMTBITS; + fe->symmetric_rate = 1; + + fe->playback.stream_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "PCM%d TX", i); + fe->capture.stream_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "PCM%d RX", i); + + if (!fe->playback.stream_name || !fe->capture.stream_name) { + ret = -ENOMEM; + goto err_release; + } + + be->id = i + nclusters; + be->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "mca-i2s-%d", i); + if (!be->name) { + ret = -ENOMEM; + goto err_release; + } + be->ops = &mca_be_ops; + be->playback.channels_min = 1; + be->playback.channels_max = 32; + be->playback.rates = SNDRV_PCM_RATE_8000_192000; + be->playback.formats = APPLE_MCA_FMTBITS; + be->capture.channels_min = 1; + be->capture.channels_max = 32; + be->capture.rates = SNDRV_PCM_RATE_8000_192000; + be->capture.formats = APPLE_MCA_FMTBITS; + + be->playback.stream_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "I2S%d TX", i); + be->capture.stream_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "I2S%d RX", i); + if (!be->playback.stream_name || !be->capture.stream_name) { + ret = -ENOMEM; + goto err_release; + } + } + + ret = devm_snd_soc_register_component(&pdev->dev, &mca_component, + dai_drivers, nclusters * 2); + if (ret) { + dev_err(&pdev->dev, "unable to register ASoC component: %d\n", ret); + goto err_release; + } + + return 0; + +err_release: + apple_mca_release(mca); + return ret; +} + +static int apple_mca_remove(struct platform_device *pdev) +{ + struct mca_data *mca = platform_get_drvdata(pdev); + + apple_mca_release(mca); + return 0; +} + +static const struct of_device_id apple_mca_of_match[] = { + { .compatible = "apple,mca", }, + {} +}; +MODULE_DEVICE_TABLE(of, apple_mca_of_match); + +static struct platform_driver apple_mca_driver = { + .driver = { + .name = "apple-mca", + .owner = THIS_MODULE, + .of_match_table = apple_mca_of_match, + }, + .probe = apple_mca_probe, + .remove = apple_mca_remove, +}; +module_platform_driver(apple_mca_driver); + +MODULE_AUTHOR("Martin Povišer povik+lin@cutebit.org"); +MODULE_DESCRIPTION("ASoC platform driver for Apple Silicon SoCs"); +MODULE_LICENSE("GPL");

Signed-off-by: Martin Povišer povik+lin@cutebit.org --- sound/soc/apple/Kconfig | 16 + sound/soc/apple/Makefile | 2 + sound/soc/apple/macaudio.c | 1004 ++++++++++++++++++++++++++++++++++++ 3 files changed, 1022 insertions(+) create mode 100644 sound/soc/apple/macaudio.c

diff --git a/sound/soc/apple/Kconfig b/sound/soc/apple/Kconfig index 0ba955657e98..8db30569af9c 100644 --- a/sound/soc/apple/Kconfig +++ b/sound/soc/apple/Kconfig @@ -1,3 +1,19 @@ +config SND_SOC_APPLE_MACAUDIO + tristate "Audio support for Apple Silicon Macs" + depends on ARCH_APPLE || COMPILE_TEST + select SND_SOC_APPLE_MCA + select SND_SIMPLE_CARD_UTILS + select APPLE_ADMAC + select COMMON_CLK_APPLE_NCO + select SND_SOC_TAS2764 + select SND_SOC_TAS2770 + select SND_SOC_CS42L42 + default ARCH_APPLE + help + This option enables an ASoC machine-level driver for Apple Silicon Macs + and it also enables the required SoC and codec drivers for overall + sound support on these machines. + config SND_SOC_APPLE_MCA tristate "Apple Silicon MCA driver" depends on ARCH_APPLE || COMPILE_TEST diff --git a/sound/soc/apple/Makefile b/sound/soc/apple/Makefile index 7a30bf452817..3ffb19ed1d0a 100644 --- a/sound/soc/apple/Makefile +++ b/sound/soc/apple/Makefile @@ -1,3 +1,5 @@ snd-soc-apple-mca-objs := mca.o +snd-soc-macaudio-objs := macaudio.o

+obj-$(CONFIG_SND_SOC_APPLE_MACAUDIO) += snd-soc-macaudio.o obj-$(CONFIG_SND_SOC_APPLE_MCA) += snd-soc-apple-mca.o diff --git a/sound/soc/apple/macaudio.c b/sound/soc/apple/macaudio.c new file mode 100644 index 000000000000..24a7200e06f6 --- /dev/null +++ b/sound/soc/apple/macaudio.c @@ -0,0 +1,1004 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ASoC machine driver for Apple Silicon Macs + * + * Copyright (C) The Asahi Linux Contributors + * + * Based on sound/soc/qcom/{sc7180.c|common.c} + * + * Copyright (c) 2018, Linaro Limited. + * Copyright (c) 2020, The Linux Foundation. All rights reserved. + * + * + * Virtual FE/BE Playback Topology + * ------------------------------- + * + * The platform driver has independent frontend and backend DAIs with the + * option of routing backends to any of the frontends. The platform + * driver configures the routing based on DPCM couplings in ASoC runtime + * structures, which in turn is determined from DAPM paths by ASoC. But the + * platform driver doesn't supply relevant DAPM paths and leaves that up for + * the machine driver to fill in. The filled-in virtual topology can be + * anything as long as a particular backend isn't connected to more than one + * frontend at any given time. (The limitation is due to the unsupported case + * of reparenting of live BEs.) + * + * The DAPM routing that this machine-level driver makes up has two use-cases + * in mind: + * + * - Using a single PCM for playback such that it conditionally sinks to either + * speakers or headphones based on the plug-in state of the headphones jack. + * All the while making the switch transparent to userspace. This has the + * drawback of requiring a sample stream suited for both speakers and + * headphones, which is hard to come by on machines where tailored DSP for + * speakers in userspace is desirable or required. + * + * - Driving the headphones and speakers from distinct PCMs, having userspace + * bridge the difference and apply different signal processing to the two. + * + * In the end the topology supplied by this driver looks like this: + * + * PCMs (frontends) I2S Port Groups (backends) + * ──────────────── ────────────────────────── + * + * ┌──────────┐ ┌───────────────► ┌─────┐ ┌──────────┐ + * │ Primary ├───────┤ │ Mux │ ──► │ Speakers │ + * └──────────┘ │ ┌──────────► └─────┘ └──────────┘ + * ┌─── │ ───┘ ▲ + * ┌──────────┐ │ │ │ + * │Secondary ├──┘ │ ┌────────────┴┐ + * └──────────┘ ├────►│Plug-in Demux│ + * │ └────────────┬┘ + * │ │ + * │ ▼ + * │ ┌─────┐ ┌──────────┐ + * └───────────────► │ Mux │ ──► │Headphones│ + * └─────┘ └──────────┘ + */ + +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <sound/core.h> +#include <sound/jack.h> +#include <sound/pcm.h> +#include <sound/simple_card_utils.h> +#include <sound/soc.h> +#include <uapi/linux/input-event-codes.h> + +#define DRIVER_NAME "snd-soc-macaudio" + +/* + * CPU side is bit and frame clock provider + * I2S has both clocks inverted + */ +#define MACAUDIO_DAI_FMT (SND_SOC_DAIFMT_I2S | \ + SND_SOC_DAIFMT_CBC_CFC | \ + SND_SOC_DAIFMT_GATED | \ + SND_SOC_DAIFMT_IB_IF) +#define MACAUDIO_JACK_MASK (SND_JACK_HEADSET | SND_JACK_HEADPHONE) +#define MACAUDIO_SLOTWIDTH 32 + +struct macaudio_model_data { + bool deactive_asi1_sel; + int spk_amp_gain_max; +}; + +struct macaudio_snd_data { + struct snd_soc_card card; + struct snd_soc_jack_pin pin; + struct snd_soc_jack jack; + int jack_plugin_state; + struct snd_kcontrol *plugin_demux_kcontrol; + + struct macaudio_link_props { + /* frontend props */ + unsigned int mclk_fs; + + /* backend props */ + bool is_speakers; + bool is_headphones; + unsigned int tdm_mask; + } *link_props; + + unsigned int speaker_nchans_array[2]; + struct snd_pcm_hw_constraint_list speaker_nchans_list; + + struct macaudio_model_data *mdata; +}; + +static bool void_warranty; +module_param(void_warranty, bool, 0644); +MODULE_PARM_DESC(void_warranty, "Keep going even without speaker volume safety caps"); + +SND_SOC_DAILINK_DEFS(primary, + DAILINK_COMP_ARRAY(COMP_CPU("mca-pcm-0")), // CPU + DAILINK_COMP_ARRAY(COMP_DUMMY()), // CODEC + DAILINK_COMP_ARRAY(COMP_EMPTY())); // platform (filled at runtime) + +SND_SOC_DAILINK_DEFS(secondary, + DAILINK_COMP_ARRAY(COMP_CPU("mca-pcm-1")), // CPU + DAILINK_COMP_ARRAY(COMP_DUMMY()), // CODEC + DAILINK_COMP_ARRAY(COMP_EMPTY())); + +static struct snd_soc_dai_link macaudio_fe_links[] = { + { + .name = "Primary", + .stream_name = "Primary", + .dynamic = 1, + .dpcm_playback = 1, + .dpcm_capture = 1, + .dpcm_merged_rate = 1, + .dpcm_merged_chan = 1, + .dpcm_merged_format = 1, + .dai_fmt = MACAUDIO_DAI_FMT, + SND_SOC_DAILINK_REG(primary), + }, + { + .name = "Secondary", + .stream_name = "Secondary", + .dynamic = 1, + .dpcm_playback = 1, + .dpcm_merged_rate = 1, + .dpcm_merged_chan = 1, + .dpcm_merged_format = 1, + .dai_fmt = MACAUDIO_DAI_FMT, + SND_SOC_DAILINK_REG(secondary), + }, +}; + +static struct macaudio_link_props macaudio_fe_link_props[] = { + { + /* + * Primary FE + * + * The mclk/fs ratio at 64 for the primary frontend is important + * to ensure that the headphones codec's idea of left and right + * in a stereo stream over I2S fits in nicely with everyone else's. + * (This is until the headphones codec's driver supports + * set_tdm_slot.) + * + * The low mclk/fs ratio precludes transmitting more than two + * channels over I2S, but that's okay since there is the secondary + * FE for speaker arrays anyway. + */ + .mclk_fs = 64, + }, + { + /* + * Secondary FE + * + * Here we want frames plenty long to be able to drive all + * those fancy speaker arrays. + */ + .mclk_fs = 256, + } +}; + +static int macaudio_copy_link(struct device *dev, struct snd_soc_dai_link *target, + struct snd_soc_dai_link *source) +{ + memcpy(target, source, sizeof(struct snd_soc_dai_link)); + + target->cpus = devm_kcalloc(dev, target->num_cpus, + sizeof(*target->cpus), GFP_KERNEL); + target->codecs = devm_kcalloc(dev, target->num_codecs, + sizeof(*target->codecs), GFP_KERNEL); + target->platforms = devm_kcalloc(dev, target->num_platforms, + sizeof(*target->platforms), GFP_KERNEL); + + if (!target->cpus || !target->codecs || !target->platforms) + return -ENOMEM; + + memcpy(target->cpus, source->cpus, sizeof(*target->cpus) * target->num_cpus); + memcpy(target->codecs, source->codecs, sizeof(*target->codecs) * target->num_codecs); + memcpy(target->platforms, source->platforms, sizeof(*target->platforms) * target->num_platforms); + + return 0; +} + +static int macaudio_parse_of_component(struct device_node *node, int index, + struct snd_soc_dai_link_component *comp) +{ + struct of_phandle_args args; + int ret; + + ret = of_parse_phandle_with_args(node, "sound-dai", "#sound-dai-cells", + index, &args); + if (ret) + return ret; + comp->of_node = args.np; + return snd_soc_get_dai_name(&args, &comp->dai_name); +} + +/* + * Parse one DPCM backend from the devicetree. This means taking one + * of the CPU DAIs and combining it with one or more CODEC DAIs. + */ +static int macaudio_parse_of_be_dai_link(struct macaudio_snd_data *ma, + struct snd_soc_dai_link *link, + int be_index, int ncodecs_per_be, + struct device_node *cpu, + struct device_node *codec) +{ + struct snd_soc_dai_link_component *comp; + struct device *dev = ma->card.dev; + int codec_base = be_index * ncodecs_per_be; + int ret, i; + + link->no_pcm = 1; + link->dpcm_playback = 1; + link->dpcm_capture = 1; + + link->dai_fmt = MACAUDIO_DAI_FMT; + + link->num_codecs = ncodecs_per_be; + link->codecs = devm_kcalloc(dev, ncodecs_per_be, + sizeof(*comp), GFP_KERNEL); + link->num_cpus = 1; + link->cpus = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL); + + if (!link->codecs || !link->cpus) + return -ENOMEM; + + link->num_platforms = 0; + + for_each_link_codecs(link, i, comp) { + ret = macaudio_parse_of_component(codec, codec_base + i, comp); + if (ret) + return ret; + } + + ret = macaudio_parse_of_component(cpu, be_index, link->cpus); + if (ret) + return ret; + + link->name = link->cpus[0].dai_name; + + return 0; +} + +static int macaudio_parse_of(struct macaudio_snd_data *ma) +{ + struct device_node *codec = NULL; + struct device_node *cpu = NULL; + struct device_node *np = NULL; + struct device_node *platform = NULL; + struct snd_soc_dai_link *link = NULL; + struct snd_soc_card *card = &ma->card; + struct device *dev = card->dev; + struct macaudio_link_props *link_props; + int ret, num_links, i; + + ret = snd_soc_of_parse_card_name(card, "model"); + if (ret) { + dev_err(dev, "Error parsing card name: %d\n", ret); + return ret; + } + + /* Populate links, start with the fixed number of FE links */ + num_links = ARRAY_SIZE(macaudio_fe_links); + + /* Now add together the (dynamic) number of BE links */ + for_each_available_child_of_node(dev->of_node, np) { + int num_cpus; + + cpu = of_get_child_by_name(np, "cpu"); + if (!cpu) { + dev_err(dev, "missing CPU DAI node at %pOF\n", np); + ret = -EINVAL; + goto err_free; + } + + num_cpus = of_count_phandle_with_args(cpu, "sound-dai", + "#sound-dai-cells"); + + if (num_cpus <= 0) { + dev_err(card->dev, "missing sound-dai property at %pOF\n", cpu); + ret = -EINVAL; + goto err_free; + } + of_node_put(cpu); + cpu = NULL; + + /* Each CPU specified counts as one BE link */ + num_links += num_cpus; + } + + /* Allocate the DAI link array */ + card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL); + ma->link_props = devm_kcalloc(dev, num_links, sizeof(*ma->link_props), GFP_KERNEL); + if (!card->dai_link || !ma->link_props) + return -ENOMEM; + + card->num_links = num_links; + link = card->dai_link; + link_props = ma->link_props; + + for (i = 0; i < ARRAY_SIZE(macaudio_fe_links); i++) { + ret = macaudio_copy_link(dev, link, &macaudio_fe_links[i]); + if (ret) + goto err_free; + + memcpy(link_props, &macaudio_fe_link_props[i], sizeof(struct macaudio_link_props)); + link++; link_props++; + } + + for (i = 0; i < num_links; i++) + card->dai_link[i].id = i; + + /* Fill in the BEs */ + for_each_available_child_of_node(dev->of_node, np) { + const char *link_name; + bool speakers; + int be_index, num_codecs, num_bes, ncodecs_per_cpu, nchannels; + unsigned int left_mask, right_mask; + + ret = of_property_read_string(np, "link-name", &link_name); + if (ret) { + dev_err(card->dev, "missing link name\n"); + goto err_free; + } + + speakers = !strcmp(link_name, "Speaker") + || !strcmp(link_name, "Speakers"); + + cpu = of_get_child_by_name(np, "cpu"); + codec = of_get_child_by_name(np, "codec"); + + if (!codec || !cpu) { + dev_err(dev, "missing DAI specifications for '%s'\n", link_name); + ret = -EINVAL; + goto err_free; + } + + num_bes = of_count_phandle_with_args(cpu, "sound-dai", + "#sound-dai-cells"); + if (num_bes <= 0) { + dev_err(card->dev, "missing sound-dai property at %pOF\n", cpu); + ret = -EINVAL; + goto err_free; + } + + num_codecs = of_count_phandle_with_args(codec, "sound-dai", + "#sound-dai-cells"); + if (num_codecs <= 0) { + dev_err(card->dev, "missing sound-dai property at %pOF\n", codec); + ret = -EINVAL; + goto err_free; + } + + if (num_codecs % num_bes != 0) { + dev_err(card->dev, "bad combination of CODEC (%d) and CPU (%d) number at %pOF\n", + num_codecs, num_bes, np); + ret = -EINVAL; + goto err_free; + } + + /* + * Now parse the cpu/codec lists into a number of DPCM backend links. + * In each link there will be one DAI from the cpu list paired with + * an evenly distributed number of DAIs from the codec list. (As is + * the binding semantics.) + */ + ncodecs_per_cpu = num_codecs / num_bes; + nchannels = num_codecs * (speakers ? 1 : 2); + + /* + * If there is a single speaker, assign two channels to it, because + * it can do downmix. + */ + if (nchannels < 2) + nchannels = 2; + + left_mask = 0; + for (i = 0; i < nchannels; i += 2) + left_mask = left_mask << 2 | 1; + right_mask = left_mask << 1; + + for (be_index = 0; be_index < num_bes; be_index++) { + ret = macaudio_parse_of_be_dai_link(ma, link, be_index, + ncodecs_per_cpu, cpu, codec); + if (ret) + goto err_free; + + link_props->is_speakers = speakers; + link_props->is_headphones = !speakers; + + if (num_bes == 2) + /* This sound peripheral is split between left and right BE */ + link_props->tdm_mask = be_index ? right_mask : left_mask; + else + /* One BE covers all of the peripheral */ + link_props->tdm_mask = left_mask | right_mask; + + /* Steal platform OF reference for use in FE links later */ + platform = link->cpus->of_node; + + link++; link_props++; + } + + of_node_put(codec); + of_node_put(cpu); + cpu = codec = NULL; + } + + for (i = 0; i < ARRAY_SIZE(macaudio_fe_links); i++) + card->dai_link[i].platforms->of_node = platform; + + return 0; + +err_free: + of_node_put(codec); + of_node_put(cpu); + of_node_put(np); + + if (!card->dai_link) + return ret; + + for (i = 0; i < num_links; i++) { + /* + * TODO: If we don't go through this path are the references + * freed inside ASoC? + */ + snd_soc_of_put_dai_link_codecs(&card->dai_link[i]); + snd_soc_of_put_dai_link_cpus(&card->dai_link[i]); + } + + return ret; +} + +static int macaudio_get_runtime_mclk_fs(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(rtd->card); + struct snd_soc_dpcm *dpcm; + + /* + * If this is a FE, look it up in link_props directly. + * If this is a BE, look it up in the respective FE. + */ + if (!rtd->dai_link->no_pcm) + return ma->link_props[rtd->dai_link->id].mclk_fs; + + for_each_dpcm_fe(rtd, substream->stream, dpcm) { + int fe_id = dpcm->fe->dai_link->id; + + return ma->link_props[fe_id].mclk_fs; + } + + return 0; +} + +static int macaudio_dpcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int mclk_fs = macaudio_get_runtime_mclk_fs(substream); + int i; + + if (mclk_fs) { + struct snd_soc_dai *dai; + int mclk = params_rate(params) * mclk_fs; + + for_each_rtd_codec_dais(rtd, i, dai) + snd_soc_dai_set_sysclk(dai, 0, mclk, SND_SOC_CLOCK_IN); + + snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, SND_SOC_CLOCK_OUT); + } + + return 0; +} + +static void macaudio_dpcm_shutdown(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + struct snd_soc_dai *dai; + int mclk_fs = macaudio_get_runtime_mclk_fs(substream); + int i; + + if (mclk_fs) { + for_each_rtd_codec_dais(rtd, i, dai) + snd_soc_dai_set_sysclk(dai, 0, 0, SND_SOC_CLOCK_IN); + + snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT); + } +} + +static const struct snd_soc_ops macaudio_fe_ops = { + .shutdown = macaudio_dpcm_shutdown, + .hw_params = macaudio_dpcm_hw_params, +}; + +static const struct snd_soc_ops macaudio_be_ops = { + .shutdown = macaudio_dpcm_shutdown, + .hw_params = macaudio_dpcm_hw_params, +}; + +static int macaudio_be_assign_tdm(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card); + struct macaudio_link_props *props = &ma->link_props[rtd->dai_link->id]; + struct snd_soc_dai *dai; + unsigned int mask; + int nslots, ret, i; + + if (!props->tdm_mask) + return 0; + + mask = props->tdm_mask; + nslots = __fls(mask) + 1; + + if (rtd->num_codecs == 1) { + ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_codec(rtd, 0), mask, + 0, nslots, MACAUDIO_SLOTWIDTH); + + /* + * Headphones get a pass on -EOPNOTSUPP (see the comment + * around mclk_fs value for primary FE). + */ + if (ret == -EOPNOTSUPP && props->is_headphones) + return 0; + + return ret; + } + + for_each_rtd_codec_dais(rtd, i, dai) { + int slot = __ffs(mask); + + mask &= ~(1 << slot); + ret = snd_soc_dai_set_tdm_slot(dai, 1 << slot, 0, nslots, + MACAUDIO_SLOTWIDTH); + if (ret) + return ret; + } + + return 0; +} + +static int macaudio_be_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card); + struct macaudio_link_props *props = &ma->link_props[rtd->dai_link->id]; + struct snd_soc_dai *dai; + int i, ret; + + ret = macaudio_be_assign_tdm(rtd); + if (ret < 0) + return ret; + + if (props->is_headphones) { + for_each_rtd_codec_dais(rtd, i, dai) + snd_soc_component_set_jack(dai->component, &ma->jack, NULL); + } + + return 0; +} + +static void macaudio_be_exit(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card); + struct macaudio_link_props *props = &ma->link_props[rtd->dai_link->id]; + struct snd_soc_dai *dai; + int i; + + if (props->is_headphones) { + for_each_rtd_codec_dais(rtd, i, dai) + snd_soc_component_set_jack(dai->component, NULL, NULL); + } +} + +static int macaudio_fe_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card); + struct macaudio_link_props *props = &ma->link_props[rtd->dai_link->id]; + int nslots = props->mclk_fs / MACAUDIO_SLOTWIDTH; + + return snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), (1 << nslots) - 1, + (1 << nslots) - 1, nslots, MACAUDIO_SLOTWIDTH); +} + + +static int macaudio_jack_event(struct notifier_block *nb, unsigned long event, + void *data); + +static struct notifier_block macaudio_jack_nb = { + .notifier_call = macaudio_jack_event, +}; + +static int macaudio_probe(struct snd_soc_card *card) +{ + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card); + int ret; + + ma->pin.pin = "Headphones"; + ma->pin.mask = SND_JACK_HEADSET | SND_JACK_HEADPHONE; + ret = snd_soc_card_jack_new(card, ma->pin.pin, + SND_JACK_HEADSET | + SND_JACK_HEADPHONE | + SND_JACK_BTN_0 | SND_JACK_BTN_1 | + SND_JACK_BTN_2 | SND_JACK_BTN_3, + &ma->jack, &ma->pin, 1); + + if (ret < 0) { + dev_err(card->dev, "jack creation failed: %d\n", ret); + return ret; + } + + snd_soc_jack_notifier_register(&ma->jack, &macaudio_jack_nb); + + return ret; +} + +static int macaudio_add_backend_dai_route(struct snd_soc_card *card, struct snd_soc_dai *dai, + bool is_speakers) +{ + struct snd_soc_dapm_route routes[2]; + int nroutes; + int ret; + memset(routes, 0, sizeof(routes)); + + dev_dbg(card->dev, "adding routes for '%s'\n", dai->name); + + if (is_speakers) + routes[0].source = "Speakers Playback"; + else + routes[0].source = "Headphones Playback"; + routes[0].sink = dai->playback_widget->name; + nroutes = 1; + + if (!is_speakers) { + routes[1].source = dai->capture_widget->name; + routes[1].sink = "Headphones Capture"; + nroutes = 2; + } + + ret = snd_soc_dapm_add_routes(&card->dapm, routes, nroutes); + if (ret) + dev_err(card->dev, "failed adding dynamic DAPM routes for %s\n", + dai->name); + return ret; +} + +static bool macaudio_match_kctl_name(const char *pattern, const char *name) +{ + if (pattern[0] == '*') { + int namelen, patternlen; + + pattern++; + if (pattern[0] == ' ') + pattern++; + + namelen = strlen(name); + patternlen = strlen(pattern); + + if (namelen > patternlen) + name += (namelen - patternlen); + } + + return !strcmp(name, pattern); +} + +static int macaudio_limit_volume(struct snd_soc_card *card, + const char *pattern, int max) +{ + struct snd_kcontrol *kctl; + struct soc_mixer_control *mc; + int found = 0; + + list_for_each_entry(kctl, &card->snd_card->controls, list) { + if (!macaudio_match_kctl_name(pattern, kctl->id.name)) + continue; + + found++; + dev_dbg(card->dev, "limiting volume on '%s'\n", kctl->id.name); + + /* + * TODO: This doesn't decrease the volume if it's already + * above the limit! + */ + mc = (struct soc_mixer_control *)kctl->private_value; + if (max <= mc->max) + mc->platform_max = max; + + } + + return found; +} + +static int macaudio_late_probe(struct snd_soc_card *card) +{ + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card); + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_dai *dai; + int ret, i; + + /* Add the dynamic DAPM routes */ + for_each_card_rtds(card, rtd) { + struct macaudio_link_props *props = &ma->link_props[rtd->dai_link->id]; + + if (!rtd->dai_link->no_pcm) + continue; + + for_each_rtd_cpu_dais(rtd, i, dai) { + ret = macaudio_add_backend_dai_route(card, dai, props->is_speakers); + + if (ret) + return ret; + } + } + + if (!ma->mdata) { + dev_err(card->dev, "driver doesn't know speaker limits for this model\n"); + return void_warranty ? 0 : -EINVAL; + } + + macaudio_limit_volume(card, "* Amp Gain", ma->mdata->spk_amp_gain_max); + return 0; +} + +static const char * const macaudio_plugin_demux_texts[] = { + "Speakers", + "Headphones" +}; + +SOC_ENUM_SINGLE_VIRT_DECL(macaudio_plugin_demux_enum, macaudio_plugin_demux_texts); + +static int macaudio_plugin_demux_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol); + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(dapm->card); + + /* + * TODO: Determine what locking is in order here... + */ + ucontrol->value.enumerated.item[0] = ma->jack_plugin_state; + + return 0; +} + +static int macaudio_jack_event(struct notifier_block *nb, unsigned long event, + void *data) +{ + struct snd_soc_jack *jack = data; + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(jack->card); + + ma->jack_plugin_state = !!event; + + if (!ma->plugin_demux_kcontrol) + return 0; + + snd_soc_dapm_mux_update_power(&ma->card.dapm, ma->plugin_demux_kcontrol, + ma->jack_plugin_state, + (struct soc_enum *) &macaudio_plugin_demux_enum, NULL); + + return 0; +} + +static const struct snd_kcontrol_new macaudio_plugin_demux = { + .access = (SNDRV_CTL_ELEM_ACCESS_READ | + SNDRV_CTL_ELEM_ACCESS_VOLATILE), + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Plug-in Playback Demux", + .info = snd_soc_info_enum_double, + .get = macaudio_plugin_demux_get, + .private_value = (unsigned long) &macaudio_plugin_demux_enum +}; + +static int macaudio_kctl_set_enum(struct snd_kcontrol *kctl, + const char *strvalue) +{ + struct snd_ctl_elem_value value; + struct snd_ctl_elem_info info; + int sel, i, ret; + + ret = kctl->info(kctl, &info); + if (ret < 0) + return ret; + + if (info.type != SNDRV_CTL_ELEM_TYPE_ENUMERATED) + return -EINVAL; + + for (sel = 0; sel < info.value.enumerated.items; sel++) { + info.value.enumerated.item = sel; + ret = kctl->info(kctl, &info); + if (ret < 0) + return ret; + + if (!strcmp(strvalue, info.value.enumerated.name)) + break; + } + + if (sel == info.value.enumerated.items) + return -EINVAL; + + for (i = 0; i < info.count; i++) + value.value.enumerated.item[i] = sel; + + return kctl->put(kctl, &value); +} + +static void macaudio_deactivate_asi1_sel(struct snd_soc_card *card) +{ + struct snd_kcontrol *kctl; + int ret; + + list_for_each_entry(kctl, &card->snd_card->controls, list) { + if (!macaudio_match_kctl_name("* ASI1 Sel", kctl->id.name)) + continue; + + ret = macaudio_kctl_set_enum(kctl, "Left"); + if (ret < 0) + dev_err(card->dev, "can't pin '%s': %d\n", kctl->id.name, ret); + + ret = snd_ctl_activate_id(card->snd_card, &kctl->id, 0); + if (ret < 0) + dev_err(card->dev, "can't deactivate '%s': %d\n", kctl->id.name, ret); + else + dev_dbg(card->dev, "deactivated '%s'\n", kctl->id.name); + } +} + +static void macaudio_fixup_controls(struct snd_soc_card *card) +{ + struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card); + const char *name = macaudio_plugin_demux.name; + + ma->plugin_demux_kcontrol = snd_soc_card_get_kcontrol(card, name); + + if (!ma->plugin_demux_kcontrol) + dev_err(card->dev, "can't find control '%s'\n", name); + + if (ma->mdata && ma->mdata->deactive_asi1_sel) + macaudio_deactivate_asi1_sel(card); + + macaudio_limit_volume(card, "* Amp Gain Volume", ma->mdata->spk_amp_gain_max); +} + +static const char * const macaudio_spk_mux_texts[] = { + "Primary (Conditional)", + "Primary", + "Secondary" +}; + +SOC_ENUM_SINGLE_VIRT_DECL(macaudio_spk_mux_enum, macaudio_spk_mux_texts); + +static const struct snd_kcontrol_new macaudio_spk_mux = + SOC_DAPM_ENUM("Speakers Playback Mux", macaudio_spk_mux_enum); + +static const char * const macaudio_hp_mux_texts[] = { + "Primary (Conditional)", + "Primary", +}; + +SOC_ENUM_SINGLE_VIRT_DECL(macaudio_hp_mux_enum, macaudio_hp_mux_texts); + +static const struct snd_kcontrol_new macaudio_hp_mux = + SOC_DAPM_ENUM("Headphones Playback Mux", macaudio_hp_mux_enum); + +static const struct snd_soc_dapm_widget macaudio_snd_widgets[] = { + SND_SOC_DAPM_HP("Headphones", NULL), + SND_SOC_DAPM_SPK("Speakers", NULL), + + SND_SOC_DAPM_MUX("Speakers Playback Mux", SND_SOC_NOPM, 0, 0, &macaudio_spk_mux), + SND_SOC_DAPM_MUX("Headphones Playback Mux", SND_SOC_NOPM, 0, 0, &macaudio_hp_mux), + SND_SOC_DAPM_DEMUX("Plug-in Playback Demux", SND_SOC_NOPM, 0, 0, &macaudio_plugin_demux), + + SND_SOC_DAPM_AIF_OUT("Plug-in Headphones Playback", NULL, 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_OUT("Plug-in Speakers Playback", NULL, 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_OUT("Speakers Playback", NULL, 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_OUT("Headphones Playback", NULL, 0, SND_SOC_NOPM, 0, 0), + + SND_SOC_DAPM_AIF_IN("Headphones Capture", NULL, 0, SND_SOC_NOPM, 0, 0), +}; + +static const struct snd_soc_dapm_route macaudio_dapm_routes[] = { + /* Playback paths */ + { "Plug-in Playback Demux", NULL, "PCM0 TX" }, + { "Plug-in Speakers Playback", "Speakers", "Plug-in Playback Demux" }, + { "Plug-in Headphones Playback", "Headphones", "Plug-in Playback Demux" }, + + { "Speakers Playback Mux", "Primary (Conditional)", "Plug-in Speakers Playback" }, + { "Speakers Playback Mux", "Primary", "PCM0 TX" }, + { "Speakers Playback Mux", "Secondary", "PCM1 TX" }, + { "Speakers Playback", NULL, "Speakers Playback Mux"}, + + { "Headphones Playback Mux", "Primary (Conditional)", "Plug-in Headphones Playback" }, + { "Headphones Playback Mux", "Primary", "PCM0 TX" }, + { "Headphones Playback", NULL, "Headphones Playback Mux"}, + /* + * Additional paths (to specific I2S ports) are added dynamically. + */ + + /* Capture paths */ + { "PCM0 RX", NULL, "Headphones Capture" }, +}; + +struct macaudio_model_data macaudio_j274_mdata = { + .spk_amp_gain_max = 20, +}; + +struct macaudio_model_data macaudio_j314_mdata = { + .deactive_asi1_sel = true, + .spk_amp_gain_max = 15, +}; + +static const struct of_device_id macaudio_snd_device_id[] = { + { .compatible = "apple,j274-macaudio", .data = &macaudio_j274_mdata }, + { .compatible = "apple,j314-macaudio", .data = &macaudio_j314_mdata }, + { .compatible = "apple,macaudio"}, + { } +}; +MODULE_DEVICE_TABLE(of, macaudio_snd_device_id); + +static int macaudio_snd_platform_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card; + struct macaudio_snd_data *data; + struct device *dev = &pdev->dev; + struct snd_soc_dai_link *link; + const struct of_device_id *of_id; + int ret; + int i; + + of_id = of_match_device(macaudio_snd_device_id, dev); + if (!of_id) + return -EINVAL; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + card = &data->card; + snd_soc_card_set_drvdata(card, data); + + data->mdata = (struct macaudio_model_data *) of_id->data; + + card->owner = THIS_MODULE; + card->driver_name = DRIVER_NAME; + card->dev = dev; + card->dapm_widgets = macaudio_snd_widgets; + card->num_dapm_widgets = ARRAY_SIZE(macaudio_snd_widgets); + card->dapm_routes = macaudio_dapm_routes; + card->num_dapm_routes = ARRAY_SIZE(macaudio_dapm_routes); + card->probe = macaudio_probe; + card->late_probe = macaudio_late_probe; + card->fixup_controls = macaudio_fixup_controls; + + ret = macaudio_parse_of(data); + if (ret) + return ret; + + for_each_card_prelinks(card, i, link) { + if (link->no_pcm) { + link->ops = &macaudio_be_ops; + link->init = macaudio_be_init; + link->exit = macaudio_be_exit; + } else { + link->ops = &macaudio_fe_ops; + link->init = macaudio_fe_init; + } + } + + return devm_snd_soc_register_card(dev, card); +} + +static struct platform_driver macaudio_snd_driver = { + .probe = macaudio_snd_platform_probe, + .driver = { + .name = DRIVER_NAME, + .of_match_table = macaudio_snd_device_id, + .pm = &snd_soc_pm_ops, + }, +}; +module_platform_driver(macaudio_snd_driver); + +MODULE_AUTHOR("Martin Povišer povik+lin@cutebit.org"); +MODULE_DESCRIPTION("Apple Silicon Macs machine-level sound driver"); +MODULE_LICENSE("GPL");