ASoC: mchp-spdifrx: add driver for SPDIF RX
The new SPDIF RX controller is a serial port compliant with the IEC-60958 standard. It also supports programmable User Data and Channel Status fields. This IP is embedded in Microchip's sama7g5 SoC. Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Link: https://lore.kernel.org/r/20201002160305.815523-3-codrin.ciubotariu@microchip.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Codrin Ciubotariu
Mark Brown
parent
1a4c450e57
commit
ef265c55c1
@ -144,4 +144,17 @@ config SND_MCHP_SOC_SPDIFTX
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This S/PDIF TX driver is compliant with IEC-60958 standard and
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includes programable User Data and Channel Status fields.
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config SND_MCHP_SOC_SPDIFRX
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tristate "Microchip ASoC driver for boards using S/PDIF RX"
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depends on OF && (ARCH_AT91 || COMPILE_TEST)
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select SND_SOC_GENERIC_DMAENGINE_PCM
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select REGMAP_MMIO
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help
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Say Y or M if you want to add support for Microchip S/PDIF RX ASoc
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driver on the following Microchip platforms:
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- sama7g5
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This S/PDIF RX driver is compliant with IEC-60958 standard and
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includes programable User Data and Channel Status fields.
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endif
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@ -6,6 +6,7 @@ snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
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snd-soc-atmel-i2s-objs := atmel-i2s.o
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snd-soc-mchp-i2s-mcc-objs := mchp-i2s-mcc.o
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snd-soc-mchp-spdiftx-objs := mchp-spdiftx.o
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snd-soc-mchp-spdifrx-objs := mchp-spdifrx.o
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# pdc and dma need to both be built-in if any user of
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# ssc is built-in.
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@ -19,6 +20,7 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
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obj-$(CONFIG_SND_ATMEL_SOC_I2S) += snd-soc-atmel-i2s.o
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obj-$(CONFIG_SND_MCHP_SOC_I2S_MCC) += snd-soc-mchp-i2s-mcc.o
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obj-$(CONFIG_SND_MCHP_SOC_SPDIFTX) += snd-soc-mchp-spdiftx.o
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obj-$(CONFIG_SND_MCHP_SOC_SPDIFRX) += snd-soc-mchp-spdifrx.o
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# AT91 Machine Support
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snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o
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954
sound/soc/atmel/mchp-spdifrx.c
Normal file
954
sound/soc/atmel/mchp-spdifrx.c
Normal file
@ -0,0 +1,954 @@
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// SPDX-License-Identifier: GPL-2.0
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//
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// Driver for Microchip S/PDIF RX Controller
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//
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// Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries
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//
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// Author: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/spinlock.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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/*
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* ---- S/PDIF Receiver Controller Register map ----
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*/
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#define SPDIFRX_CR 0x00 /* Control Register */
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#define SPDIFRX_MR 0x04 /* Mode Register */
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#define SPDIFRX_IER 0x10 /* Interrupt Enable Register */
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#define SPDIFRX_IDR 0x14 /* Interrupt Disable Register */
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#define SPDIFRX_IMR 0x18 /* Interrupt Mask Register */
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#define SPDIFRX_ISR 0x1c /* Interrupt Status Register */
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#define SPDIFRX_RSR 0x20 /* Status Register */
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#define SPDIFRX_RHR 0x24 /* Holding Register */
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#define SPDIFRX_CHSR(channel, reg) \
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(0x30 + (channel) * 0x30 + (reg) * 4) /* Channel x Status Registers */
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#define SPDIFRX_CHUD(channel, reg) \
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(0x48 + (channel) * 0x30 + (reg) * 4) /* Channel x User Data Registers */
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#define SPDIFRX_WPMR 0xE4 /* Write Protection Mode Register */
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#define SPDIFRX_WPSR 0xE8 /* Write Protection Status Register */
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#define SPDIFRX_VERSION 0xFC /* Version Register */
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/*
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* ---- Control Register (Write-only) ----
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*/
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#define SPDIFRX_CR_SWRST BIT(0) /* Software Reset */
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/*
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* ---- Mode Register (Read/Write) ----
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*/
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/* Receive Enable */
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#define SPDIFRX_MR_RXEN_MASK GENMASK(0, 0)
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#define SPDIFRX_MR_RXEN_DISABLE (0 << 0) /* SPDIF Receiver Disabled */
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#define SPDIFRX_MR_RXEN_ENABLE (1 << 0) /* SPDIF Receiver Enabled */
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/* Validity Bit Mode */
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#define SPDIFRX_MR_VBMODE_MASK GENAMSK(1, 1)
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#define SPDIFRX_MR_VBMODE_ALWAYS_LOAD \
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(0 << 1) /* Load sample regardles of validity bit value */
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#define SPDIFRX_MR_VBMODE_DISCARD_IF_VB1 \
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(1 << 1) /* Load sample only if validity bit is 0 */
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/* Data Word Endian Mode */
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#define SPDIFRX_MR_ENDIAN_MASK GENMASK(2, 2)
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#define SPDIFRX_MR_ENDIAN_LITTLE (0 << 2) /* Little Endian Mode */
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#define SPDIFRX_MR_ENDIAN_BIG (1 << 2) /* Big Endian Mode */
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/* Parity Bit Mode */
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#define SPDIFRX_MR_PBMODE_MASK GENMASK(3, 3)
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#define SPDIFRX_MR_PBMODE_PARCHECK (0 << 3) /* Parity Check Enabled */
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#define SPDIFRX_MR_PBMODE_NOPARCHECK (1 << 3) /* Parity Check Disabled */
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/* Sample Data Width */
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#define SPDIFRX_MR_DATAWIDTH_MASK GENMASK(5, 4)
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#define SPDIFRX_MR_DATAWIDTH(width) \
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(((6 - (width) / 4) << 4) & SPDIFRX_MR_DATAWIDTH_MASK)
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/* Packed Data Mode in Receive Holding Register */
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#define SPDIFRX_MR_PACK_MASK GENMASK(7, 7)
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#define SPDIFRX_MR_PACK_DISABLED (0 << 7)
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#define SPDIFRX_MR_PACK_ENABLED (1 << 7)
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/* Start of Block Bit Mode */
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#define SPDIFRX_MR_SBMODE_MASK GENMASK(8, 8)
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#define SPDIFRX_MR_SBMODE_ALWAYS_LOAD (0 << 8)
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#define SPDIFRX_MR_SBMODE_DISCARD (1 << 8)
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/* Consecutive Preamble Error Threshold Automatic Restart */
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#define SPDIFRX_MR_AUTORST_MASK GENMASK(24, 24)
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#define SPDIFRX_MR_AUTORST_NOACTION (0 << 24)
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#define SPDIFRX_MR_AUTORST_UNLOCK_ON_PRE_ERR (1 << 24)
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/*
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* ---- Interrupt Enable/Disable/Mask/Status Register (Write/Read-only) ----
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*/
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#define SPDIFRX_IR_RXRDY BIT(0)
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#define SPDIFRX_IR_LOCKED BIT(1)
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#define SPDIFRX_IR_LOSS BIT(2)
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#define SPDIFRX_IR_BLOCKEND BIT(3)
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#define SPDIFRX_IR_SFE BIT(4)
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#define SPDIFRX_IR_PAR_ERR BIT(5)
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#define SPDIFRX_IR_OVERRUN BIT(6)
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#define SPDIFRX_IR_RXFULL BIT(7)
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#define SPDIFRX_IR_CSC(ch) BIT((ch) + 8)
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#define SPDIFRX_IR_SECE BIT(10)
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#define SPDIFRX_IR_BLOCKST BIT(11)
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#define SPDIFRX_IR_NRZ_ERR BIT(12)
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#define SPDIFRX_IR_PRE_ERR BIT(13)
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#define SPDIFRX_IR_CP_ERR BIT(14)
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/*
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* ---- Receiver Status Register (Read/Write) ----
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*/
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/* Enable Status */
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#define SPDIFRX_RSR_ULOCK BIT(0)
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#define SPDIFRX_RSR_BADF BIT(1)
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#define SPDIFRX_RSR_LOWF BIT(2)
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#define SPDIFRX_RSR_NOSIGNAL BIT(3)
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#define SPDIFRX_RSR_IFS_MASK GENMASK(27, 16)
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#define SPDIFRX_RSR_IFS(reg) \
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(((reg) & SPDIFRX_RSR_IFS_MASK) >> 16)
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/*
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* ---- Version Register (Read-only) ----
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*/
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#define SPDIFRX_VERSION_MASK GENMASK(11, 0)
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#define SPDIFRX_VERSION_MFN_MASK GENMASK(18, 16)
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#define SPDIFRX_VERSION_MFN(reg) (((reg) & SPDIFRX_VERSION_MFN_MASK) >> 16)
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static bool mchp_spdifrx_readable_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case SPDIFRX_MR:
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case SPDIFRX_IMR:
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case SPDIFRX_ISR:
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case SPDIFRX_RSR:
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case SPDIFRX_CHSR(0, 0):
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case SPDIFRX_CHSR(0, 1):
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case SPDIFRX_CHSR(0, 2):
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case SPDIFRX_CHSR(0, 3):
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case SPDIFRX_CHSR(0, 4):
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case SPDIFRX_CHSR(0, 5):
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case SPDIFRX_CHUD(0, 0):
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case SPDIFRX_CHUD(0, 1):
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case SPDIFRX_CHUD(0, 2):
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case SPDIFRX_CHUD(0, 3):
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case SPDIFRX_CHUD(0, 4):
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case SPDIFRX_CHUD(0, 5):
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case SPDIFRX_CHSR(1, 0):
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case SPDIFRX_CHSR(1, 1):
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case SPDIFRX_CHSR(1, 2):
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case SPDIFRX_CHSR(1, 3):
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case SPDIFRX_CHSR(1, 4):
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case SPDIFRX_CHSR(1, 5):
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case SPDIFRX_CHUD(1, 0):
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case SPDIFRX_CHUD(1, 1):
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case SPDIFRX_CHUD(1, 2):
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case SPDIFRX_CHUD(1, 3):
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case SPDIFRX_CHUD(1, 4):
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case SPDIFRX_CHUD(1, 5):
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case SPDIFRX_WPMR:
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case SPDIFRX_WPSR:
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case SPDIFRX_VERSION:
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return true;
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default:
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return false;
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}
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}
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static bool mchp_spdifrx_writeable_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case SPDIFRX_CR:
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case SPDIFRX_MR:
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case SPDIFRX_IER:
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case SPDIFRX_IDR:
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case SPDIFRX_WPMR:
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return true;
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default:
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return false;
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}
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}
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static bool mchp_spdifrx_precious_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case SPDIFRX_ISR:
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case SPDIFRX_RHR:
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return true;
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default:
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return false;
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}
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}
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static const struct regmap_config mchp_spdifrx_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 32,
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.max_register = SPDIFRX_VERSION,
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.readable_reg = mchp_spdifrx_readable_reg,
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.writeable_reg = mchp_spdifrx_writeable_reg,
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.precious_reg = mchp_spdifrx_precious_reg,
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};
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#define SPDIFRX_GCLK_RATIO_MIN (12 * 64)
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#define SPDIFRX_CS_BITS 192
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#define SPDIFRX_UD_BITS 192
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#define SPDIFRX_CHANNELS 2
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struct mchp_spdifrx_ch_stat {
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unsigned char data[SPDIFRX_CS_BITS / 8];
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struct completion done;
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};
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struct mchp_spdifrx_user_data {
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unsigned char data[SPDIFRX_UD_BITS / 8];
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struct completion done;
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spinlock_t lock; /* protect access to user data */
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};
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struct mchp_spdifrx_mixer_control {
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struct mchp_spdifrx_ch_stat ch_stat[SPDIFRX_CHANNELS];
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struct mchp_spdifrx_user_data user_data[SPDIFRX_CHANNELS];
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bool ulock;
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bool badf;
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bool signal;
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};
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struct mchp_spdifrx_dev {
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struct snd_dmaengine_dai_dma_data capture;
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struct mchp_spdifrx_mixer_control control;
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spinlock_t blockend_lock; /* protect access to blockend_refcount */
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int blockend_refcount;
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struct device *dev;
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struct regmap *regmap;
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struct clk *pclk;
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struct clk *gclk;
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unsigned int fmt;
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unsigned int gclk_enabled:1;
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};
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static void mchp_spdifrx_channel_status_read(struct mchp_spdifrx_dev *dev,
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int channel)
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{
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struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
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u8 *ch_stat = &ctrl->ch_stat[channel].data[0];
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u32 val;
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int i;
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for (i = 0; i < ARRAY_SIZE(ctrl->ch_stat[channel].data) / 4; i++) {
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regmap_read(dev->regmap, SPDIFRX_CHSR(channel, i), &val);
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*ch_stat++ = val & 0xFF;
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*ch_stat++ = (val >> 8) & 0xFF;
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*ch_stat++ = (val >> 16) & 0xFF;
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*ch_stat++ = (val >> 24) & 0xFF;
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}
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}
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static void mchp_spdifrx_channel_user_data_read(struct mchp_spdifrx_dev *dev,
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int channel)
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{
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struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
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u8 *user_data = &ctrl->user_data[channel].data[0];
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u32 val;
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int i;
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for (i = 0; i < ARRAY_SIZE(ctrl->user_data[channel].data) / 4; i++) {
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regmap_read(dev->regmap, SPDIFRX_CHUD(channel, i), &val);
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*user_data++ = val & 0xFF;
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*user_data++ = (val >> 8) & 0xFF;
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*user_data++ = (val >> 16) & 0xFF;
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*user_data++ = (val >> 24) & 0xFF;
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}
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}
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/* called from non-atomic context only */
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static void mchp_spdifrx_isr_blockend_en(struct mchp_spdifrx_dev *dev)
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{
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unsigned long flags;
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spin_lock_irqsave(&dev->blockend_lock, flags);
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dev->blockend_refcount++;
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/* don't enable BLOCKEND interrupt if it's already enabled */
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if (dev->blockend_refcount == 1)
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regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_BLOCKEND);
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spin_unlock_irqrestore(&dev->blockend_lock, flags);
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}
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/* called from atomic context only */
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static void mchp_spdifrx_isr_blockend_dis(struct mchp_spdifrx_dev *dev)
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{
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spin_lock(&dev->blockend_lock);
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dev->blockend_refcount--;
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/* don't enable BLOCKEND interrupt if it's already enabled */
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if (dev->blockend_refcount == 0)
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regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_BLOCKEND);
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spin_unlock(&dev->blockend_lock);
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}
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static irqreturn_t mchp_spdif_interrupt(int irq, void *dev_id)
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{
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struct mchp_spdifrx_dev *dev = dev_id;
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struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
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u32 sr, imr, pending, idr = 0;
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irqreturn_t ret = IRQ_NONE;
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int ch;
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regmap_read(dev->regmap, SPDIFRX_ISR, &sr);
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regmap_read(dev->regmap, SPDIFRX_IMR, &imr);
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pending = sr & imr;
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dev_dbg(dev->dev, "ISR: %#x, IMR: %#x, pending: %#x\n", sr, imr,
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pending);
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if (!pending)
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return IRQ_NONE;
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if (pending & SPDIFRX_IR_BLOCKEND) {
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for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) {
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spin_lock(&ctrl->user_data[ch].lock);
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mchp_spdifrx_channel_user_data_read(dev, ch);
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spin_unlock(&ctrl->user_data[ch].lock);
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complete(&ctrl->user_data[ch].done);
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}
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mchp_spdifrx_isr_blockend_dis(dev);
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ret = IRQ_HANDLED;
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}
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for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) {
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if (pending & SPDIFRX_IR_CSC(ch)) {
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mchp_spdifrx_channel_status_read(dev, ch);
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complete(&ctrl->ch_stat[ch].done);
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idr |= SPDIFRX_IR_CSC(ch);
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ret = IRQ_HANDLED;
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}
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}
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if (pending & SPDIFRX_IR_OVERRUN) {
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dev_warn(dev->dev, "Overrrun detected\n");
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ret = IRQ_HANDLED;
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}
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regmap_write(dev->regmap, SPDIFRX_IDR, idr);
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return ret;
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}
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static int mchp_spdifrx_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
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u32 mr;
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int running;
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int ret;
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regmap_read(dev->regmap, SPDIFRX_MR, &mr);
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running = !!(mr & SPDIFRX_MR_RXEN_ENABLE);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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if (!running) {
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mr &= ~SPDIFRX_MR_RXEN_MASK;
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mr |= SPDIFRX_MR_RXEN_ENABLE;
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/* enable overrun interrupts */
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regmap_write(dev->regmap, SPDIFRX_IER,
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SPDIFRX_IR_OVERRUN);
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}
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break;
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case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
if (running) {
|
||||
mr &= ~SPDIFRX_MR_RXEN_MASK;
|
||||
mr |= SPDIFRX_MR_RXEN_DISABLE;
|
||||
/* disable overrun interrupts */
|
||||
regmap_write(dev->regmap, SPDIFRX_IDR,
|
||||
SPDIFRX_IR_OVERRUN);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = regmap_write(dev->regmap, SPDIFRX_MR, mr);
|
||||
if (ret) {
|
||||
dev_err(dev->dev, "unable to enable/disable RX: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
u32 mr;
|
||||
int ret;
|
||||
|
||||
dev_dbg(dev->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
|
||||
__func__, params_rate(params), params_format(params),
|
||||
params_width(params), params_channels(params));
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
dev_err(dev->dev, "Playback is not supported\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
regmap_read(dev->regmap, SPDIFRX_MR, &mr);
|
||||
|
||||
if (mr & SPDIFRX_MR_RXEN_ENABLE) {
|
||||
dev_err(dev->dev, "PCM already running\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
if (params_channels(params) != SPDIFRX_CHANNELS) {
|
||||
dev_err(dev->dev, "unsupported number of channels: %d\n",
|
||||
params_channels(params));
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
switch (params_format(params)) {
|
||||
case SNDRV_PCM_FORMAT_S16_BE:
|
||||
case SNDRV_PCM_FORMAT_S20_3BE:
|
||||
case SNDRV_PCM_FORMAT_S24_3BE:
|
||||
case SNDRV_PCM_FORMAT_S24_BE:
|
||||
mr |= SPDIFRX_MR_ENDIAN_BIG;
|
||||
fallthrough;
|
||||
case SNDRV_PCM_FORMAT_S16_LE:
|
||||
case SNDRV_PCM_FORMAT_S20_3LE:
|
||||
case SNDRV_PCM_FORMAT_S24_3LE:
|
||||
case SNDRV_PCM_FORMAT_S24_LE:
|
||||
mr |= SPDIFRX_MR_DATAWIDTH(params_width(params));
|
||||
break;
|
||||
default:
|
||||
dev_err(dev->dev, "unsupported PCM format: %d\n",
|
||||
params_format(params));
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (dev->gclk_enabled) {
|
||||
clk_disable_unprepare(dev->gclk);
|
||||
dev->gclk_enabled = 0;
|
||||
}
|
||||
ret = clk_set_min_rate(dev->gclk, params_rate(params) *
|
||||
SPDIFRX_GCLK_RATIO_MIN + 1);
|
||||
if (ret) {
|
||||
dev_err(dev->dev,
|
||||
"unable to set gclk min rate: rate %u * ratio %u + 1\n",
|
||||
params_rate(params), SPDIFRX_GCLK_RATIO_MIN);
|
||||
return ret;
|
||||
}
|
||||
ret = clk_prepare_enable(dev->gclk);
|
||||
if (ret) {
|
||||
dev_err(dev->dev, "unable to enable gclk: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
dev->gclk_enabled = 1;
|
||||
|
||||
dev_dbg(dev->dev, "GCLK range min set to %d\n",
|
||||
params_rate(params) * SPDIFRX_GCLK_RATIO_MIN + 1);
|
||||
|
||||
return regmap_write(dev->regmap, SPDIFRX_MR, mr);
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_hw_free(struct snd_pcm_substream *substream,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
|
||||
if (dev->gclk_enabled) {
|
||||
clk_disable_unprepare(dev->gclk);
|
||||
dev->gclk_enabled = 0;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct snd_soc_dai_ops mchp_spdifrx_dai_ops = {
|
||||
.trigger = mchp_spdifrx_trigger,
|
||||
.hw_params = mchp_spdifrx_hw_params,
|
||||
.hw_free = mchp_spdifrx_hw_free,
|
||||
};
|
||||
|
||||
#define MCHP_SPDIF_RATES SNDRV_PCM_RATE_8000_192000
|
||||
|
||||
#define MCHP_SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
|
||||
SNDRV_PCM_FMTBIT_U16_BE | \
|
||||
SNDRV_PCM_FMTBIT_S20_3LE | \
|
||||
SNDRV_PCM_FMTBIT_S20_3BE | \
|
||||
SNDRV_PCM_FMTBIT_S24_3LE | \
|
||||
SNDRV_PCM_FMTBIT_S24_3BE | \
|
||||
SNDRV_PCM_FMTBIT_S24_LE | \
|
||||
SNDRV_PCM_FMTBIT_S24_BE \
|
||||
)
|
||||
|
||||
static int mchp_spdifrx_info(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_info *uinfo)
|
||||
{
|
||||
uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
|
||||
uinfo->count = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_cs_get(struct mchp_spdifrx_dev *dev,
|
||||
int channel,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
|
||||
struct mchp_spdifrx_ch_stat *ch_stat = &ctrl->ch_stat[channel];
|
||||
int ret;
|
||||
|
||||
regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_CSC(channel));
|
||||
/* check for new data available */
|
||||
ret = wait_for_completion_interruptible_timeout(&ch_stat->done,
|
||||
msecs_to_jiffies(100));
|
||||
/* IP might not be started or valid stream might not be prezent */
|
||||
if (ret < 0) {
|
||||
dev_dbg(dev->dev, "channel status for channel %d timeout\n",
|
||||
channel);
|
||||
}
|
||||
|
||||
memcpy(uvalue->value.iec958.status, ch_stat->data,
|
||||
sizeof(ch_stat->data));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_cs1_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
|
||||
return mchp_spdifrx_cs_get(dev, 0, uvalue);
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_cs2_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
|
||||
return mchp_spdifrx_cs_get(dev, 1, uvalue);
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_cs_mask(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
memset(uvalue->value.iec958.status, 0xff,
|
||||
sizeof(uvalue->value.iec958.status));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_subcode_ch_get(struct mchp_spdifrx_dev *dev,
|
||||
int channel,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
|
||||
struct mchp_spdifrx_user_data *user_data = &ctrl->user_data[channel];
|
||||
int ret;
|
||||
|
||||
reinit_completion(&user_data->done);
|
||||
mchp_spdifrx_isr_blockend_en(dev);
|
||||
ret = wait_for_completion_interruptible_timeout(&user_data->done,
|
||||
msecs_to_jiffies(100));
|
||||
/* IP might not be started or valid stream might not be prezent */
|
||||
if (ret <= 0) {
|
||||
dev_dbg(dev->dev, "user data for channel %d timeout\n",
|
||||
channel);
|
||||
return ret;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&user_data->lock, flags);
|
||||
memcpy(uvalue->value.iec958.subcode, user_data->data,
|
||||
sizeof(user_data->data));
|
||||
spin_unlock_irqrestore(&user_data->lock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_subcode_ch1_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
|
||||
return mchp_spdifrx_subcode_ch_get(dev, 0, uvalue);
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_subcode_ch2_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
|
||||
return mchp_spdifrx_subcode_ch_get(dev, 1, uvalue);
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_boolean_info(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_info *uinfo)
|
||||
{
|
||||
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
|
||||
uinfo->count = 1;
|
||||
uinfo->value.integer.min = 0;
|
||||
uinfo->value.integer.max = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_ulock_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
|
||||
u32 val;
|
||||
bool ulock_old = ctrl->ulock;
|
||||
|
||||
regmap_read(dev->regmap, SPDIFRX_RSR, &val);
|
||||
ctrl->ulock = !(val & SPDIFRX_RSR_ULOCK);
|
||||
uvalue->value.integer.value[0] = ctrl->ulock;
|
||||
|
||||
return ulock_old != ctrl->ulock;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_badf_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
|
||||
u32 val;
|
||||
bool badf_old = ctrl->badf;
|
||||
|
||||
regmap_read(dev->regmap, SPDIFRX_RSR, &val);
|
||||
ctrl->badf = !!(val & SPDIFRX_RSR_BADF);
|
||||
uvalue->value.integer.value[0] = ctrl->badf;
|
||||
|
||||
return badf_old != ctrl->badf;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_signal_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *uvalue)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
|
||||
u32 val;
|
||||
bool signal_old = ctrl->signal;
|
||||
|
||||
regmap_read(dev->regmap, SPDIFRX_RSR, &val);
|
||||
ctrl->signal = !(val & SPDIFRX_RSR_NOSIGNAL);
|
||||
uvalue->value.integer.value[0] = ctrl->signal;
|
||||
|
||||
return signal_old != ctrl->signal;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_rate_info(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_info *uinfo)
|
||||
{
|
||||
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
|
||||
uinfo->count = 1;
|
||||
uinfo->value.integer.min = 0;
|
||||
uinfo->value.integer.max = 192000;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_rate_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *ucontrol)
|
||||
{
|
||||
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
u32 val;
|
||||
int rate;
|
||||
|
||||
regmap_read(dev->regmap, SPDIFRX_RSR, &val);
|
||||
|
||||
/* if the receiver is not locked, ISF data is invalid */
|
||||
if (val & SPDIFRX_RSR_ULOCK || !(val & SPDIFRX_RSR_IFS_MASK)) {
|
||||
ucontrol->value.integer.value[0] = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
rate = clk_get_rate(dev->gclk);
|
||||
|
||||
ucontrol->value.integer.value[0] = rate / (32 * SPDIFRX_RSR_IFS(val));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_kcontrol_new mchp_spdifrx_ctrls[] = {
|
||||
/* Channel status controller */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT)
|
||||
" Channel 1",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_info,
|
||||
.get = mchp_spdifrx_cs1_get,
|
||||
},
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT)
|
||||
" Channel 2",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_info,
|
||||
.get = mchp_spdifrx_cs2_get,
|
||||
},
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ,
|
||||
.info = mchp_spdifrx_info,
|
||||
.get = mchp_spdifrx_cs_mask,
|
||||
},
|
||||
/* User bits controller */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = "IEC958 Subcode Capture Default Channel 1",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_info,
|
||||
.get = mchp_spdifrx_subcode_ch1_get,
|
||||
},
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = "IEC958 Subcode Capture Default Channel 2",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_info,
|
||||
.get = mchp_spdifrx_subcode_ch2_get,
|
||||
},
|
||||
/* Lock status */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Unlocked",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_boolean_info,
|
||||
.get = mchp_spdifrx_ulock_get,
|
||||
},
|
||||
/* Bad format */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE)"Bad Format",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_boolean_info,
|
||||
.get = mchp_spdifrx_badf_get,
|
||||
},
|
||||
/* Signal */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Signal",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_boolean_info,
|
||||
.get = mchp_spdifrx_signal_get,
|
||||
},
|
||||
/* Sampling rate */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Rate",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = mchp_spdifrx_rate_info,
|
||||
.get = mchp_spdifrx_rate_get,
|
||||
},
|
||||
};
|
||||
|
||||
static int mchp_spdifrx_dai_probe(struct snd_soc_dai *dai)
|
||||
{
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
struct mchp_spdifrx_mixer_control *ctrl = &dev->control;
|
||||
int ch;
|
||||
int err;
|
||||
|
||||
err = clk_prepare_enable(dev->pclk);
|
||||
if (err) {
|
||||
dev_err(dev->dev,
|
||||
"failed to enable the peripheral clock: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
snd_soc_dai_init_dma_data(dai, NULL, &dev->capture);
|
||||
|
||||
/* Software reset the IP */
|
||||
regmap_write(dev->regmap, SPDIFRX_CR, SPDIFRX_CR_SWRST);
|
||||
|
||||
/* Default configuration */
|
||||
regmap_write(dev->regmap, SPDIFRX_MR,
|
||||
SPDIFRX_MR_VBMODE_DISCARD_IF_VB1 |
|
||||
SPDIFRX_MR_SBMODE_DISCARD |
|
||||
SPDIFRX_MR_AUTORST_NOACTION |
|
||||
SPDIFRX_MR_PACK_DISABLED);
|
||||
|
||||
dev->blockend_refcount = 0;
|
||||
for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) {
|
||||
init_completion(&ctrl->ch_stat[ch].done);
|
||||
init_completion(&ctrl->user_data[ch].done);
|
||||
spin_lock_init(&ctrl->user_data[ch].lock);
|
||||
}
|
||||
|
||||
/* Add controls */
|
||||
snd_soc_add_dai_controls(dai, mchp_spdifrx_ctrls,
|
||||
ARRAY_SIZE(mchp_spdifrx_ctrls));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mchp_spdifrx_dai_remove(struct snd_soc_dai *dai)
|
||||
{
|
||||
struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
|
||||
|
||||
/* Disable interrupts */
|
||||
regmap_write(dev->regmap, SPDIFRX_IDR, 0xFF);
|
||||
|
||||
clk_disable_unprepare(dev->pclk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_soc_dai_driver mchp_spdifrx_dai = {
|
||||
.name = "mchp-spdifrx",
|
||||
.probe = mchp_spdifrx_dai_probe,
|
||||
.remove = mchp_spdifrx_dai_remove,
|
||||
.capture = {
|
||||
.stream_name = "S/PDIF Capture",
|
||||
.channels_min = SPDIFRX_CHANNELS,
|
||||
.channels_max = SPDIFRX_CHANNELS,
|
||||
.rates = MCHP_SPDIF_RATES,
|
||||
.formats = MCHP_SPDIF_FORMATS,
|
||||
},
|
||||
.ops = &mchp_spdifrx_dai_ops,
|
||||
};
|
||||
|
||||
static const struct snd_soc_component_driver mchp_spdifrx_component = {
|
||||
.name = "mchp-spdifrx",
|
||||
};
|
||||
|
||||
static const struct of_device_id mchp_spdifrx_dt_ids[] = {
|
||||
{
|
||||
.compatible = "microchip,sama7g5-spdifrx",
|
||||
},
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, mchp_spdifrx_dt_ids);
|
||||
|
||||
static int mchp_spdifrx_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct mchp_spdifrx_dev *dev;
|
||||
struct resource *mem;
|
||||
struct regmap *regmap;
|
||||
void __iomem *base;
|
||||
int irq;
|
||||
int err;
|
||||
u32 vers;
|
||||
|
||||
/* Get memory for driver data. */
|
||||
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
|
||||
if (!dev)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Map I/O registers. */
|
||||
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
base = devm_ioremap_resource(&pdev->dev, mem);
|
||||
if (IS_ERR(base))
|
||||
return PTR_ERR(base);
|
||||
|
||||
regmap = devm_regmap_init_mmio(&pdev->dev, base,
|
||||
&mchp_spdifrx_regmap_config);
|
||||
if (IS_ERR(regmap))
|
||||
return PTR_ERR(regmap);
|
||||
|
||||
/* Request IRQ. */
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq < 0)
|
||||
return irq;
|
||||
|
||||
err = devm_request_irq(&pdev->dev, irq, mchp_spdif_interrupt, 0,
|
||||
dev_name(&pdev->dev), dev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* Get the peripheral clock */
|
||||
dev->pclk = devm_clk_get(&pdev->dev, "pclk");
|
||||
if (IS_ERR(dev->pclk)) {
|
||||
err = PTR_ERR(dev->pclk);
|
||||
dev_err(&pdev->dev, "failed to get the peripheral clock: %d\n",
|
||||
err);
|
||||
return err;
|
||||
}
|
||||
|
||||
/* Get the generated clock */
|
||||
dev->gclk = devm_clk_get(&pdev->dev, "gclk");
|
||||
if (IS_ERR(dev->gclk)) {
|
||||
err = PTR_ERR(dev->gclk);
|
||||
dev_err(&pdev->dev,
|
||||
"failed to get the PMC generated clock: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
spin_lock_init(&dev->blockend_lock);
|
||||
|
||||
dev->dev = &pdev->dev;
|
||||
dev->regmap = regmap;
|
||||
platform_set_drvdata(pdev, dev);
|
||||
|
||||
dev->capture.addr = (dma_addr_t)mem->start + SPDIFRX_RHR;
|
||||
dev->capture.maxburst = 1;
|
||||
|
||||
err = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "failed to register PMC: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
err = devm_snd_soc_register_component(&pdev->dev,
|
||||
&mchp_spdifrx_component,
|
||||
&mchp_spdifrx_dai, 1);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "fail to register dai\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
regmap_read(regmap, SPDIFRX_VERSION, &vers);
|
||||
dev_info(&pdev->dev, "hw version: %#lx\n", vers & SPDIFRX_VERSION_MASK);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver mchp_spdifrx_driver = {
|
||||
.probe = mchp_spdifrx_probe,
|
||||
.driver = {
|
||||
.name = "mchp_spdifrx",
|
||||
.of_match_table = of_match_ptr(mchp_spdifrx_dt_ids),
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(mchp_spdifrx_driver);
|
||||
|
||||
MODULE_AUTHOR("Codrin Ciubotariu <codrin.ciubotariu@microchip.com>");
|
||||
MODULE_DESCRIPTION("Microchip S/PDIF RX Controller Driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user