ASoC: stm32: Add SPDIFRX support
Add SPDIFRX support to STM32. Signed-off-by: olivier moysan <olivier.moysan@st.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
olivier moysan
Mark Brown
parent
0507cb0226
commit
03e4d5d56f
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@ -18,4 +18,14 @@ config SND_SOC_STM32_I2S
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help
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Say Y if you want to enable I2S for STM32
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config SND_SOC_STM32_SPDIFRX
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tristate "STM32 S/PDIF receiver (SPDIFRX) support"
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depends on ARCH_STM32 || COMPILE_TEST
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depends on SND_SOC
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select SND_SOC_GENERIC_DMAENGINE_PCM
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select REGMAP_MMIO
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select SND_SOC_SPDIF
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help
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Say Y if you want to enable S/PDIF capture for STM32
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endmenu
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@ -8,3 +8,7 @@ obj-$(CONFIG_SND_SOC_STM32_SAI) += snd-soc-stm32-sai.o
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# I2S
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snd-soc-stm32-i2s-objs := stm32_i2s.o
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obj-$(CONFIG_SND_SOC_STM32_I2S) += snd-soc-stm32-i2s.o
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# SPDIFRX
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snd-soc-stm32-spdifrx-objs := stm32_spdifrx.o
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obj-$(CONFIG_SND_SOC_STM32_SPDIFRX) += snd-soc-stm32-spdifrx.o
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@ -0,0 +1,998 @@
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/*
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* STM32 ALSA SoC Digital Audio Interface (SPDIF-rx) driver.
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*
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
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* Author(s): Olivier Moysan <olivier.moysan@st.com> for STMicroelectronics.
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*
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* License terms: GPL V2.0.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*/
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#include <linux/clk.h>
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/regmap.h>
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#include <linux/reset.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/pcm_params.h>
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/* SPDIF-rx Register Map */
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#define STM32_SPDIFRX_CR 0x00
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#define STM32_SPDIFRX_IMR 0x04
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#define STM32_SPDIFRX_SR 0x08
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#define STM32_SPDIFRX_IFCR 0x0C
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#define STM32_SPDIFRX_DR 0x10
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#define STM32_SPDIFRX_CSR 0x14
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#define STM32_SPDIFRX_DIR 0x18
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/* Bit definition for SPDIF_CR register */
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#define SPDIFRX_CR_SPDIFEN_SHIFT 0
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#define SPDIFRX_CR_SPDIFEN_MASK GENMASK(1, SPDIFRX_CR_SPDIFEN_SHIFT)
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#define SPDIFRX_CR_SPDIFENSET(x) ((x) << SPDIFRX_CR_SPDIFEN_SHIFT)
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#define SPDIFRX_CR_RXDMAEN BIT(2)
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#define SPDIFRX_CR_RXSTEO BIT(3)
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#define SPDIFRX_CR_DRFMT_SHIFT 4
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#define SPDIFRX_CR_DRFMT_MASK GENMASK(5, SPDIFRX_CR_DRFMT_SHIFT)
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#define SPDIFRX_CR_DRFMTSET(x) ((x) << SPDIFRX_CR_DRFMT_SHIFT)
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#define SPDIFRX_CR_PMSK BIT(6)
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#define SPDIFRX_CR_VMSK BIT(7)
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#define SPDIFRX_CR_CUMSK BIT(8)
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#define SPDIFRX_CR_PTMSK BIT(9)
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#define SPDIFRX_CR_CBDMAEN BIT(10)
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#define SPDIFRX_CR_CHSEL_SHIFT 11
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#define SPDIFRX_CR_CHSEL BIT(SPDIFRX_CR_CHSEL_SHIFT)
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#define SPDIFRX_CR_NBTR_SHIFT 12
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#define SPDIFRX_CR_NBTR_MASK GENMASK(13, SPDIFRX_CR_NBTR_SHIFT)
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#define SPDIFRX_CR_NBTRSET(x) ((x) << SPDIFRX_CR_NBTR_SHIFT)
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#define SPDIFRX_CR_WFA BIT(14)
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#define SPDIFRX_CR_INSEL_SHIFT 16
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#define SPDIFRX_CR_INSEL_MASK GENMASK(18, PDIFRX_CR_INSEL_SHIFT)
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#define SPDIFRX_CR_INSELSET(x) ((x) << SPDIFRX_CR_INSEL_SHIFT)
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#define SPDIFRX_CR_CKSEN_SHIFT 20
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#define SPDIFRX_CR_CKSEN BIT(20)
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#define SPDIFRX_CR_CKSBKPEN BIT(21)
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/* Bit definition for SPDIFRX_IMR register */
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#define SPDIFRX_IMR_RXNEI BIT(0)
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#define SPDIFRX_IMR_CSRNEIE BIT(1)
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#define SPDIFRX_IMR_PERRIE BIT(2)
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#define SPDIFRX_IMR_OVRIE BIT(3)
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#define SPDIFRX_IMR_SBLKIE BIT(4)
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#define SPDIFRX_IMR_SYNCDIE BIT(5)
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#define SPDIFRX_IMR_IFEIE BIT(6)
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#define SPDIFRX_XIMR_MASK GENMASK(6, 0)
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/* Bit definition for SPDIFRX_SR register */
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#define SPDIFRX_SR_RXNE BIT(0)
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#define SPDIFRX_SR_CSRNE BIT(1)
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#define SPDIFRX_SR_PERR BIT(2)
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#define SPDIFRX_SR_OVR BIT(3)
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#define SPDIFRX_SR_SBD BIT(4)
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#define SPDIFRX_SR_SYNCD BIT(5)
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#define SPDIFRX_SR_FERR BIT(6)
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#define SPDIFRX_SR_SERR BIT(7)
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#define SPDIFRX_SR_TERR BIT(8)
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#define SPDIFRX_SR_WIDTH5_SHIFT 16
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#define SPDIFRX_SR_WIDTH5_MASK GENMASK(30, PDIFRX_SR_WIDTH5_SHIFT)
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#define SPDIFRX_SR_WIDTH5SET(x) ((x) << SPDIFRX_SR_WIDTH5_SHIFT)
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/* Bit definition for SPDIFRX_IFCR register */
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#define SPDIFRX_IFCR_PERRCF BIT(2)
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#define SPDIFRX_IFCR_OVRCF BIT(3)
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#define SPDIFRX_IFCR_SBDCF BIT(4)
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#define SPDIFRX_IFCR_SYNCDCF BIT(5)
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#define SPDIFRX_XIFCR_MASK GENMASK(5, 2)
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/* Bit definition for SPDIFRX_DR register (DRFMT = 0b00) */
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#define SPDIFRX_DR0_DR_SHIFT 0
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#define SPDIFRX_DR0_DR_MASK GENMASK(23, SPDIFRX_DR0_DR_SHIFT)
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#define SPDIFRX_DR0_DRSET(x) ((x) << SPDIFRX_DR0_DR_SHIFT)
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#define SPDIFRX_DR0_PE BIT(24)
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#define SPDIFRX_DR0_V BIT(25)
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#define SPDIFRX_DR0_U BIT(26)
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#define SPDIFRX_DR0_C BIT(27)
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#define SPDIFRX_DR0_PT_SHIFT 28
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#define SPDIFRX_DR0_PT_MASK GENMASK(29, SPDIFRX_DR0_PT_SHIFT)
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#define SPDIFRX_DR0_PTSET(x) ((x) << SPDIFRX_DR0_PT_SHIFT)
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/* Bit definition for SPDIFRX_DR register (DRFMT = 0b01) */
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#define SPDIFRX_DR1_PE BIT(0)
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#define SPDIFRX_DR1_V BIT(1)
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#define SPDIFRX_DR1_U BIT(2)
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#define SPDIFRX_DR1_C BIT(3)
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#define SPDIFRX_DR1_PT_SHIFT 4
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#define SPDIFRX_DR1_PT_MASK GENMASK(5, SPDIFRX_DR1_PT_SHIFT)
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#define SPDIFRX_DR1_PTSET(x) ((x) << SPDIFRX_DR1_PT_SHIFT)
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#define SPDIFRX_DR1_DR_SHIFT 8
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#define SPDIFRX_DR1_DR_MASK GENMASK(31, SPDIFRX_DR1_DR_SHIFT)
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#define SPDIFRX_DR1_DRSET(x) ((x) << SPDIFRX_DR1_DR_SHIFT)
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/* Bit definition for SPDIFRX_DR register (DRFMT = 0b10) */
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#define SPDIFRX_DR1_DRNL1_SHIFT 0
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#define SPDIFRX_DR1_DRNL1_MASK GENMASK(15, SPDIFRX_DR1_DRNL1_SHIFT)
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#define SPDIFRX_DR1_DRNL1SET(x) ((x) << SPDIFRX_DR1_DRNL1_SHIFT)
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#define SPDIFRX_DR1_DRNL2_SHIFT 16
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#define SPDIFRX_DR1_DRNL2_MASK GENMASK(31, SPDIFRX_DR1_DRNL2_SHIFT)
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#define SPDIFRX_DR1_DRNL2SET(x) ((x) << SPDIFRX_DR1_DRNL2_SHIFT)
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/* Bit definition for SPDIFRX_CSR register */
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#define SPDIFRX_CSR_USR_SHIFT 0
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#define SPDIFRX_CSR_USR_MASK GENMASK(15, SPDIFRX_CSR_USR_SHIFT)
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#define SPDIFRX_CSR_USRGET(x) (((x) & SPDIFRX_CSR_USR_MASK)\
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>> SPDIFRX_CSR_USR_SHIFT)
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#define SPDIFRX_CSR_CS_SHIFT 16
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#define SPDIFRX_CSR_CS_MASK GENMASK(23, SPDIFRX_CSR_CS_SHIFT)
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#define SPDIFRX_CSR_CSGET(x) (((x) & SPDIFRX_CSR_CS_MASK)\
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>> SPDIFRX_CSR_CS_SHIFT)
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#define SPDIFRX_CSR_SOB BIT(24)
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/* Bit definition for SPDIFRX_DIR register */
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#define SPDIFRX_DIR_THI_SHIFT 0
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#define SPDIFRX_DIR_THI_MASK GENMASK(12, SPDIFRX_DIR_THI_SHIFT)
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#define SPDIFRX_DIR_THI_SET(x) ((x) << SPDIFRX_DIR_THI_SHIFT)
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#define SPDIFRX_DIR_TLO_SHIFT 16
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#define SPDIFRX_DIR_TLO_MASK GENMASK(28, SPDIFRX_DIR_TLO_SHIFT)
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#define SPDIFRX_DIR_TLO_SET(x) ((x) << SPDIFRX_DIR_TLO_SHIFT)
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#define SPDIFRX_SPDIFEN_DISABLE 0x0
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#define SPDIFRX_SPDIFEN_SYNC 0x1
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#define SPDIFRX_SPDIFEN_ENABLE 0x3
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#define SPDIFRX_IN1 0x1
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#define SPDIFRX_IN2 0x2
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#define SPDIFRX_IN3 0x3
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#define SPDIFRX_IN4 0x4
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#define SPDIFRX_IN5 0x5
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#define SPDIFRX_IN6 0x6
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#define SPDIFRX_IN7 0x7
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#define SPDIFRX_IN8 0x8
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#define SPDIFRX_NBTR_NONE 0x0
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#define SPDIFRX_NBTR_3 0x1
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#define SPDIFRX_NBTR_15 0x2
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#define SPDIFRX_NBTR_63 0x3
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#define SPDIFRX_DRFMT_RIGHT 0x0
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#define SPDIFRX_DRFMT_LEFT 0x1
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#define SPDIFRX_DRFMT_PACKED 0x2
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/* 192 CS bits in S/PDIF frame. i.e 24 CS bytes */
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#define SPDIFRX_CS_BYTES_NB 24
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#define SPDIFRX_UB_BYTES_NB 48
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/*
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* CSR register is retrieved as a 32 bits word
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* It contains 1 channel status byte and 2 user data bytes
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* 2 S/PDIF frames are acquired to get all CS/UB bits
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*/
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#define SPDIFRX_CSR_BUF_LENGTH (SPDIFRX_CS_BYTES_NB * 4 * 2)
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/**
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* struct stm32_spdifrx_data - private data of SPDIFRX
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* @pdev: device data pointer
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* @base: mmio register base virtual address
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* @regmap: SPDIFRX register map pointer
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* @regmap_conf: SPDIFRX register map configuration pointer
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* @cs_completion: channel status retrieving completion
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* @kclk: kernel clock feeding the SPDIFRX clock generator
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* @dma_params: dma configuration data for rx channel
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* @substream: PCM substream data pointer
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* @dmab: dma buffer info pointer
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* @ctrl_chan: dma channel for S/PDIF control bits
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* @desc:dma async transaction descriptor
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* @slave_config: dma slave channel runtime config pointer
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* @phys_addr: SPDIFRX registers physical base address
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* @lock: synchronization enabling lock
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* @cs: channel status buffer
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* @ub: user data buffer
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* @irq: SPDIFRX interrupt line
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* @refcount: keep count of opened DMA channels
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*/
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struct stm32_spdifrx_data {
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struct platform_device *pdev;
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void __iomem *base;
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struct regmap *regmap;
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const struct regmap_config *regmap_conf;
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struct completion cs_completion;
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struct clk *kclk;
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struct snd_dmaengine_dai_dma_data dma_params;
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struct snd_pcm_substream *substream;
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struct snd_dma_buffer *dmab;
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struct dma_chan *ctrl_chan;
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struct dma_async_tx_descriptor *desc;
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struct dma_slave_config slave_config;
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dma_addr_t phys_addr;
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spinlock_t lock; /* Sync enabling lock */
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unsigned char cs[SPDIFRX_CS_BYTES_NB];
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unsigned char ub[SPDIFRX_UB_BYTES_NB];
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int irq;
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int refcount;
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};
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static void stm32_spdifrx_dma_complete(void *data)
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{
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struct stm32_spdifrx_data *spdifrx = (struct stm32_spdifrx_data *)data;
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struct platform_device *pdev = spdifrx->pdev;
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u32 *p_start = (u32 *)spdifrx->dmab->area;
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u32 *p_end = p_start + (2 * SPDIFRX_CS_BYTES_NB) - 1;
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u32 *ptr = p_start;
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u16 *ub_ptr = (short *)spdifrx->ub;
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int i = 0;
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regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,
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SPDIFRX_CR_CBDMAEN,
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(unsigned int)~SPDIFRX_CR_CBDMAEN);
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if (!spdifrx->dmab->area)
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return;
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while (ptr <= p_end) {
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if (*ptr & SPDIFRX_CSR_SOB)
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break;
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ptr++;
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}
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if (ptr > p_end) {
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dev_err(&pdev->dev, "Start of S/PDIF block not found\n");
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return;
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}
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while (i < SPDIFRX_CS_BYTES_NB) {
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spdifrx->cs[i] = (unsigned char)SPDIFRX_CSR_CSGET(*ptr);
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*ub_ptr++ = SPDIFRX_CSR_USRGET(*ptr++);
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if (ptr > p_end) {
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dev_err(&pdev->dev, "Failed to get channel status\n");
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return;
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}
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i++;
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}
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complete(&spdifrx->cs_completion);
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}
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static int stm32_spdifrx_dma_ctrl_start(struct stm32_spdifrx_data *spdifrx)
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{
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dma_cookie_t cookie;
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int err;
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spdifrx->desc = dmaengine_prep_slave_single(spdifrx->ctrl_chan,
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spdifrx->dmab->addr,
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SPDIFRX_CSR_BUF_LENGTH,
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DMA_DEV_TO_MEM,
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DMA_CTRL_ACK);
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if (!spdifrx->desc)
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return -EINVAL;
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spdifrx->desc->callback = stm32_spdifrx_dma_complete;
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spdifrx->desc->callback_param = spdifrx;
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cookie = dmaengine_submit(spdifrx->desc);
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err = dma_submit_error(cookie);
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if (err)
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return -EINVAL;
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dma_async_issue_pending(spdifrx->ctrl_chan);
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return 0;
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}
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static void stm32_spdifrx_dma_ctrl_stop(struct stm32_spdifrx_data *spdifrx)
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{
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dmaengine_terminate_async(spdifrx->ctrl_chan);
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}
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static int stm32_spdifrx_start_sync(struct stm32_spdifrx_data *spdifrx)
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{
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int cr, cr_mask, imr, ret;
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/* Enable IRQs */
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imr = SPDIFRX_IMR_IFEIE | SPDIFRX_IMR_SYNCDIE | SPDIFRX_IMR_PERRIE;
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ret = regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IMR, imr, imr);
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if (ret)
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return ret;
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spin_lock(&spdifrx->lock);
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spdifrx->refcount++;
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regmap_read(spdifrx->regmap, STM32_SPDIFRX_CR, &cr);
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if (!(cr & SPDIFRX_CR_SPDIFEN_MASK)) {
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/*
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* Start sync if SPDIFRX is still in idle state.
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* SPDIFRX reception enabled when sync done
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*/
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dev_dbg(&spdifrx->pdev->dev, "start synchronization\n");
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/*
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* SPDIFRX configuration:
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* Wait for activity before starting sync process. This avoid
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* to issue sync errors when spdif signal is missing on input.
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* Preamble, CS, user, validity and parity error bits not copied
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* to DR register.
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*/
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cr = SPDIFRX_CR_WFA | SPDIFRX_CR_PMSK | SPDIFRX_CR_VMSK |
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SPDIFRX_CR_CUMSK | SPDIFRX_CR_PTMSK | SPDIFRX_CR_RXSTEO;
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cr_mask = cr;
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cr |= SPDIFRX_CR_SPDIFENSET(SPDIFRX_SPDIFEN_SYNC);
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cr_mask |= SPDIFRX_CR_SPDIFEN_MASK;
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ret = regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,
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cr_mask, cr);
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if (ret < 0)
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dev_err(&spdifrx->pdev->dev,
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"Failed to start synchronization\n");
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}
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spin_unlock(&spdifrx->lock);
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return ret;
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}
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static void stm32_spdifrx_stop(struct stm32_spdifrx_data *spdifrx)
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{
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int cr, cr_mask, reg;
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spin_lock(&spdifrx->lock);
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if (--spdifrx->refcount) {
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spin_unlock(&spdifrx->lock);
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return;
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}
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cr = SPDIFRX_CR_SPDIFENSET(SPDIFRX_SPDIFEN_DISABLE);
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cr_mask = SPDIFRX_CR_SPDIFEN_MASK | SPDIFRX_CR_RXDMAEN;
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|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR, cr_mask, cr);
|
||||
|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IMR,
|
||||
SPDIFRX_XIMR_MASK, 0);
|
||||
|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IFCR,
|
||||
SPDIFRX_XIFCR_MASK, SPDIFRX_XIFCR_MASK);
|
||||
|
||||
/* dummy read to clear CSRNE and RXNE in status register */
|
||||
regmap_read(spdifrx->regmap, STM32_SPDIFRX_DR, ®);
|
||||
regmap_read(spdifrx->regmap, STM32_SPDIFRX_CSR, ®);
|
||||
|
||||
spin_unlock(&spdifrx->lock);
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_dma_ctrl_register(struct device *dev,
|
||||
struct stm32_spdifrx_data *spdifrx)
|
||||
{
|
||||
int ret;
|
||||
|
||||
spdifrx->dmab = devm_kzalloc(dev, sizeof(struct snd_dma_buffer),
|
||||
GFP_KERNEL);
|
||||
if (!spdifrx->dmab)
|
||||
return -ENOMEM;
|
||||
|
||||
spdifrx->dmab->dev.type = SNDRV_DMA_TYPE_DEV_IRAM;
|
||||
spdifrx->dmab->dev.dev = dev;
|
||||
ret = snd_dma_alloc_pages(spdifrx->dmab->dev.type, dev,
|
||||
SPDIFRX_CSR_BUF_LENGTH, spdifrx->dmab);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "snd_dma_alloc_pages returned error %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
spdifrx->ctrl_chan = dma_request_chan(dev, "rx-ctrl");
|
||||
if (!spdifrx->ctrl_chan) {
|
||||
dev_err(dev, "dma_request_slave_channel failed\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
spdifrx->slave_config.direction = DMA_DEV_TO_MEM;
|
||||
spdifrx->slave_config.src_addr = (dma_addr_t)(spdifrx->phys_addr +
|
||||
STM32_SPDIFRX_CSR);
|
||||
spdifrx->slave_config.dst_addr = spdifrx->dmab->addr;
|
||||
spdifrx->slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
||||
spdifrx->slave_config.src_maxburst = 1;
|
||||
|
||||
ret = dmaengine_slave_config(spdifrx->ctrl_chan,
|
||||
&spdifrx->slave_config);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "dmaengine_slave_config returned error %d\n", ret);
|
||||
dma_release_channel(spdifrx->ctrl_chan);
|
||||
spdifrx->ctrl_chan = NULL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
};
|
||||
|
||||
static const char * const spdifrx_enum_input[] = {
|
||||
"in0", "in1", "in2", "in3"
|
||||
};
|
||||
|
||||
/* By default CS bits are retrieved from channel A */
|
||||
static const char * const spdifrx_enum_cs_channel[] = {
|
||||
"A", "B"
|
||||
};
|
||||
|
||||
static SOC_ENUM_SINGLE_DECL(ctrl_enum_input,
|
||||
STM32_SPDIFRX_CR, SPDIFRX_CR_INSEL_SHIFT,
|
||||
spdifrx_enum_input);
|
||||
|
||||
static SOC_ENUM_SINGLE_DECL(ctrl_enum_cs_channel,
|
||||
STM32_SPDIFRX_CR, SPDIFRX_CR_CHSEL_SHIFT,
|
||||
spdifrx_enum_cs_channel);
|
||||
|
||||
static int stm32_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 stm32_spdifrx_ub_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 stm32_spdifrx_get_ctrl_data(struct stm32_spdifrx_data *spdifrx)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
memset(spdifrx->cs, 0, SPDIFRX_CS_BYTES_NB);
|
||||
memset(spdifrx->ub, 0, SPDIFRX_UB_BYTES_NB);
|
||||
|
||||
ret = stm32_spdifrx_dma_ctrl_start(spdifrx);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = clk_prepare_enable(spdifrx->kclk);
|
||||
if (ret) {
|
||||
dev_err(&spdifrx->pdev->dev, "Enable kclk failed: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,
|
||||
SPDIFRX_CR_CBDMAEN, SPDIFRX_CR_CBDMAEN);
|
||||
if (ret < 0)
|
||||
goto end;
|
||||
|
||||
ret = stm32_spdifrx_start_sync(spdifrx);
|
||||
if (ret < 0)
|
||||
goto end;
|
||||
|
||||
if (wait_for_completion_interruptible_timeout(&spdifrx->cs_completion,
|
||||
msecs_to_jiffies(100))
|
||||
<= 0) {
|
||||
dev_err(&spdifrx->pdev->dev, "Failed to get control data\n");
|
||||
ret = -EAGAIN;
|
||||
}
|
||||
|
||||
stm32_spdifrx_stop(spdifrx);
|
||||
stm32_spdifrx_dma_ctrl_stop(spdifrx);
|
||||
|
||||
end:
|
||||
clk_disable_unprepare(spdifrx->kclk);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_capture_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *ucontrol)
|
||||
{
|
||||
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
|
||||
struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);
|
||||
|
||||
stm32_spdifrx_get_ctrl_data(spdifrx);
|
||||
|
||||
ucontrol->value.iec958.status[0] = spdifrx->cs[0];
|
||||
ucontrol->value.iec958.status[1] = spdifrx->cs[1];
|
||||
ucontrol->value.iec958.status[2] = spdifrx->cs[2];
|
||||
ucontrol->value.iec958.status[3] = spdifrx->cs[3];
|
||||
ucontrol->value.iec958.status[4] = spdifrx->cs[4];
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stm32_spdif_user_bits_get(struct snd_kcontrol *kcontrol,
|
||||
struct snd_ctl_elem_value *ucontrol)
|
||||
{
|
||||
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
|
||||
struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);
|
||||
|
||||
stm32_spdifrx_get_ctrl_data(spdifrx);
|
||||
|
||||
ucontrol->value.iec958.status[0] = spdifrx->ub[0];
|
||||
ucontrol->value.iec958.status[1] = spdifrx->ub[1];
|
||||
ucontrol->value.iec958.status[2] = spdifrx->ub[2];
|
||||
ucontrol->value.iec958.status[3] = spdifrx->ub[3];
|
||||
ucontrol->value.iec958.status[4] = spdifrx->ub[4];
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_kcontrol_new stm32_spdifrx_iec_ctrls[] = {
|
||||
/* Channel status control */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = stm32_spdifrx_info,
|
||||
.get = stm32_spdifrx_capture_get,
|
||||
},
|
||||
/* User bits control */
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
||||
.name = "IEC958 User Bit Capture Default",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
||||
.info = stm32_spdifrx_ub_info,
|
||||
.get = stm32_spdif_user_bits_get,
|
||||
},
|
||||
};
|
||||
|
||||
static struct snd_kcontrol_new stm32_spdifrx_ctrls[] = {
|
||||
SOC_ENUM("SPDIFRX input", ctrl_enum_input),
|
||||
SOC_ENUM("SPDIFRX CS channel", ctrl_enum_cs_channel),
|
||||
};
|
||||
|
||||
static int stm32_spdifrx_dai_register_ctrls(struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = snd_soc_add_dai_controls(cpu_dai, stm32_spdifrx_iec_ctrls,
|
||||
ARRAY_SIZE(stm32_spdifrx_iec_ctrls));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return snd_soc_add_component_controls(cpu_dai->component,
|
||||
stm32_spdifrx_ctrls,
|
||||
ARRAY_SIZE(stm32_spdifrx_ctrls));
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_dai_probe(struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx = dev_get_drvdata(cpu_dai->dev);
|
||||
|
||||
spdifrx->dma_params.addr = (dma_addr_t)(spdifrx->phys_addr +
|
||||
STM32_SPDIFRX_DR);
|
||||
spdifrx->dma_params.maxburst = 1;
|
||||
|
||||
snd_soc_dai_init_dma_data(cpu_dai, NULL, &spdifrx->dma_params);
|
||||
|
||||
return stm32_spdifrx_dai_register_ctrls(cpu_dai);
|
||||
}
|
||||
|
||||
static bool stm32_spdifrx_readable_reg(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case STM32_SPDIFRX_CR:
|
||||
case STM32_SPDIFRX_IMR:
|
||||
case STM32_SPDIFRX_SR:
|
||||
case STM32_SPDIFRX_IFCR:
|
||||
case STM32_SPDIFRX_DR:
|
||||
case STM32_SPDIFRX_CSR:
|
||||
case STM32_SPDIFRX_DIR:
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static bool stm32_spdifrx_volatile_reg(struct device *dev, unsigned int reg)
|
||||
{
|
||||
if (reg == STM32_SPDIFRX_DR)
|
||||
return true;
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool stm32_spdifrx_writeable_reg(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case STM32_SPDIFRX_CR:
|
||||
case STM32_SPDIFRX_IMR:
|
||||
case STM32_SPDIFRX_IFCR:
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct regmap_config stm32_h7_spdifrx_regmap_conf = {
|
||||
.reg_bits = 32,
|
||||
.reg_stride = 4,
|
||||
.val_bits = 32,
|
||||
.max_register = STM32_SPDIFRX_DIR,
|
||||
.readable_reg = stm32_spdifrx_readable_reg,
|
||||
.volatile_reg = stm32_spdifrx_volatile_reg,
|
||||
.writeable_reg = stm32_spdifrx_writeable_reg,
|
||||
.fast_io = true,
|
||||
};
|
||||
|
||||
static irqreturn_t stm32_spdifrx_isr(int irq, void *devid)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx = (struct stm32_spdifrx_data *)devid;
|
||||
struct snd_pcm_substream *substream = spdifrx->substream;
|
||||
struct platform_device *pdev = spdifrx->pdev;
|
||||
unsigned int cr, mask, sr, imr;
|
||||
unsigned int flags;
|
||||
int err = 0, err_xrun = 0;
|
||||
|
||||
regmap_read(spdifrx->regmap, STM32_SPDIFRX_SR, &sr);
|
||||
regmap_read(spdifrx->regmap, STM32_SPDIFRX_IMR, &imr);
|
||||
|
||||
mask = imr & SPDIFRX_XIMR_MASK;
|
||||
/* SERR, TERR, FERR IRQs are generated if IFEIE is set */
|
||||
if (mask & SPDIFRX_IMR_IFEIE)
|
||||
mask |= (SPDIFRX_IMR_IFEIE << 1) | (SPDIFRX_IMR_IFEIE << 2);
|
||||
|
||||
flags = sr & mask;
|
||||
if (!flags) {
|
||||
dev_err(&pdev->dev, "Unexpected IRQ. rflags=%#x, imr=%#x\n",
|
||||
sr, imr);
|
||||
return IRQ_NONE;
|
||||
}
|
||||
|
||||
/* Clear IRQs */
|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IFCR,
|
||||
SPDIFRX_XIFCR_MASK, flags);
|
||||
|
||||
if (flags & SPDIFRX_SR_PERR) {
|
||||
dev_dbg(&pdev->dev, "Parity error\n");
|
||||
err_xrun = 1;
|
||||
}
|
||||
|
||||
if (flags & SPDIFRX_SR_OVR) {
|
||||
dev_dbg(&pdev->dev, "Overrun error\n");
|
||||
err_xrun = 1;
|
||||
}
|
||||
|
||||
if (flags & SPDIFRX_SR_SBD)
|
||||
dev_dbg(&pdev->dev, "Synchronization block detected\n");
|
||||
|
||||
if (flags & SPDIFRX_SR_SYNCD) {
|
||||
dev_dbg(&pdev->dev, "Synchronization done\n");
|
||||
|
||||
/* Enable spdifrx */
|
||||
cr = SPDIFRX_CR_SPDIFENSET(SPDIFRX_SPDIFEN_ENABLE);
|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,
|
||||
SPDIFRX_CR_SPDIFEN_MASK, cr);
|
||||
}
|
||||
|
||||
if (flags & SPDIFRX_SR_FERR) {
|
||||
dev_dbg(&pdev->dev, "Frame error\n");
|
||||
err = 1;
|
||||
}
|
||||
|
||||
if (flags & SPDIFRX_SR_SERR) {
|
||||
dev_dbg(&pdev->dev, "Synchronization error\n");
|
||||
err = 1;
|
||||
}
|
||||
|
||||
if (flags & SPDIFRX_SR_TERR) {
|
||||
dev_dbg(&pdev->dev, "Timeout error\n");
|
||||
err = 1;
|
||||
}
|
||||
|
||||
if (err) {
|
||||
/* SPDIFRX in STATE_STOP. Disable SPDIFRX to clear errors */
|
||||
cr = SPDIFRX_CR_SPDIFENSET(SPDIFRX_SPDIFEN_DISABLE);
|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,
|
||||
SPDIFRX_CR_SPDIFEN_MASK, cr);
|
||||
|
||||
if (substream)
|
||||
snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
if (err_xrun && substream)
|
||||
snd_pcm_stop_xrun(substream);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_startup(struct snd_pcm_substream *substream,
|
||||
struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);
|
||||
int ret;
|
||||
|
||||
spdifrx->substream = substream;
|
||||
|
||||
ret = clk_prepare_enable(spdifrx->kclk);
|
||||
if (ret)
|
||||
dev_err(&spdifrx->pdev->dev, "Enable kclk failed: %d\n", ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params,
|
||||
struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);
|
||||
int data_size = params_width(params);
|
||||
int fmt;
|
||||
|
||||
switch (data_size) {
|
||||
case 16:
|
||||
fmt = SPDIFRX_DRFMT_PACKED;
|
||||
spdifrx->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
|
||||
break;
|
||||
case 32:
|
||||
fmt = SPDIFRX_DRFMT_LEFT;
|
||||
spdifrx->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
||||
break;
|
||||
default:
|
||||
dev_err(&spdifrx->pdev->dev, "Unexpected data format\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
snd_soc_dai_init_dma_data(cpu_dai, NULL, &spdifrx->dma_params);
|
||||
|
||||
return regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,
|
||||
SPDIFRX_CR_DRFMT_MASK,
|
||||
SPDIFRX_CR_DRFMTSET(fmt));
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_trigger(struct snd_pcm_substream *substream, int cmd,
|
||||
struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);
|
||||
int ret = 0;
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IMR,
|
||||
SPDIFRX_IMR_OVRIE, SPDIFRX_IMR_OVRIE);
|
||||
|
||||
regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,
|
||||
SPDIFRX_CR_RXDMAEN, SPDIFRX_CR_RXDMAEN);
|
||||
|
||||
ret = stm32_spdifrx_start_sync(spdifrx);
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
stm32_spdifrx_stop(spdifrx);
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void stm32_spdifrx_shutdown(struct snd_pcm_substream *substream,
|
||||
struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);
|
||||
|
||||
spdifrx->substream = NULL;
|
||||
clk_disable_unprepare(spdifrx->kclk);
|
||||
}
|
||||
|
||||
static const struct snd_soc_dai_ops stm32_spdifrx_pcm_dai_ops = {
|
||||
.startup = stm32_spdifrx_startup,
|
||||
.hw_params = stm32_spdifrx_hw_params,
|
||||
.trigger = stm32_spdifrx_trigger,
|
||||
.shutdown = stm32_spdifrx_shutdown,
|
||||
};
|
||||
|
||||
static struct snd_soc_dai_driver stm32_spdifrx_dai[] = {
|
||||
{
|
||||
.name = "spdifrx-capture-cpu-dai",
|
||||
.probe = stm32_spdifrx_dai_probe,
|
||||
.capture = {
|
||||
.stream_name = "CPU-Capture",
|
||||
.channels_min = 1,
|
||||
.channels_max = 2,
|
||||
.rates = SNDRV_PCM_RATE_8000_192000,
|
||||
.formats = SNDRV_PCM_FMTBIT_S32_LE |
|
||||
SNDRV_PCM_FMTBIT_S16_LE,
|
||||
},
|
||||
.ops = &stm32_spdifrx_pcm_dai_ops,
|
||||
}
|
||||
};
|
||||
|
||||
static const struct snd_pcm_hardware stm32_spdifrx_pcm_hw = {
|
||||
.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP,
|
||||
.buffer_bytes_max = 8 * PAGE_SIZE,
|
||||
.period_bytes_max = 2048, /* MDMA constraint */
|
||||
.periods_min = 2,
|
||||
.periods_max = 8,
|
||||
};
|
||||
|
||||
static const struct snd_soc_component_driver stm32_spdifrx_component = {
|
||||
.name = "stm32-spdifrx",
|
||||
};
|
||||
|
||||
static const struct snd_dmaengine_pcm_config stm32_spdifrx_pcm_config = {
|
||||
.pcm_hardware = &stm32_spdifrx_pcm_hw,
|
||||
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
|
||||
};
|
||||
|
||||
static const struct of_device_id stm32_spdifrx_ids[] = {
|
||||
{
|
||||
.compatible = "st,stm32h7-spdifrx",
|
||||
.data = &stm32_h7_spdifrx_regmap_conf
|
||||
},
|
||||
{}
|
||||
};
|
||||
|
||||
static int stm_spdifrx_parse_of(struct platform_device *pdev,
|
||||
struct stm32_spdifrx_data *spdifrx)
|
||||
{
|
||||
struct device_node *np = pdev->dev.of_node;
|
||||
const struct of_device_id *of_id;
|
||||
struct resource *res;
|
||||
|
||||
if (!np)
|
||||
return -ENODEV;
|
||||
|
||||
of_id = of_match_device(stm32_spdifrx_ids, &pdev->dev);
|
||||
if (of_id)
|
||||
spdifrx->regmap_conf =
|
||||
(const struct regmap_config *)of_id->data;
|
||||
else
|
||||
return -EINVAL;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
spdifrx->base = devm_ioremap_resource(&pdev->dev, res);
|
||||
if (IS_ERR(spdifrx->base))
|
||||
return PTR_ERR(spdifrx->base);
|
||||
|
||||
spdifrx->phys_addr = res->start;
|
||||
|
||||
spdifrx->kclk = devm_clk_get(&pdev->dev, "kclk");
|
||||
if (IS_ERR(spdifrx->kclk)) {
|
||||
dev_err(&pdev->dev, "Could not get kclk\n");
|
||||
return PTR_ERR(spdifrx->kclk);
|
||||
}
|
||||
|
||||
spdifrx->irq = platform_get_irq(pdev, 0);
|
||||
if (spdifrx->irq < 0) {
|
||||
dev_err(&pdev->dev, "No irq for node %s\n", pdev->name);
|
||||
return spdifrx->irq;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx;
|
||||
struct reset_control *rst;
|
||||
const struct snd_dmaengine_pcm_config *pcm_config = NULL;
|
||||
int ret;
|
||||
|
||||
spdifrx = devm_kzalloc(&pdev->dev, sizeof(*spdifrx), GFP_KERNEL);
|
||||
if (!spdifrx)
|
||||
return -ENOMEM;
|
||||
|
||||
spdifrx->pdev = pdev;
|
||||
init_completion(&spdifrx->cs_completion);
|
||||
spin_lock_init(&spdifrx->lock);
|
||||
|
||||
platform_set_drvdata(pdev, spdifrx);
|
||||
|
||||
ret = stm_spdifrx_parse_of(pdev, spdifrx);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
spdifrx->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "kclk",
|
||||
spdifrx->base,
|
||||
spdifrx->regmap_conf);
|
||||
if (IS_ERR(spdifrx->regmap)) {
|
||||
dev_err(&pdev->dev, "Regmap init failed\n");
|
||||
return PTR_ERR(spdifrx->regmap);
|
||||
}
|
||||
|
||||
ret = devm_request_irq(&pdev->dev, spdifrx->irq, stm32_spdifrx_isr, 0,
|
||||
dev_name(&pdev->dev), spdifrx);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "IRQ request returned %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
rst = devm_reset_control_get(&pdev->dev, NULL);
|
||||
if (!IS_ERR(rst)) {
|
||||
reset_control_assert(rst);
|
||||
udelay(2);
|
||||
reset_control_deassert(rst);
|
||||
}
|
||||
|
||||
ret = devm_snd_soc_register_component(&pdev->dev,
|
||||
&stm32_spdifrx_component,
|
||||
stm32_spdifrx_dai,
|
||||
ARRAY_SIZE(stm32_spdifrx_dai));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = stm32_spdifrx_dma_ctrl_register(&pdev->dev, spdifrx);
|
||||
if (ret)
|
||||
goto error;
|
||||
|
||||
pcm_config = &stm32_spdifrx_pcm_config;
|
||||
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, pcm_config, 0);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "PCM DMA register returned %d\n", ret);
|
||||
goto error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
if (spdifrx->ctrl_chan)
|
||||
dma_release_channel(spdifrx->ctrl_chan);
|
||||
if (spdifrx->dmab)
|
||||
snd_dma_free_pages(spdifrx->dmab);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_spdifrx_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct stm32_spdifrx_data *spdifrx = platform_get_drvdata(pdev);
|
||||
|
||||
if (spdifrx->ctrl_chan)
|
||||
dma_release_channel(spdifrx->ctrl_chan);
|
||||
|
||||
if (spdifrx->dmab)
|
||||
snd_dma_free_pages(spdifrx->dmab);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
MODULE_DEVICE_TABLE(of, stm32_spdifrx_ids);
|
||||
|
||||
static struct platform_driver stm32_spdifrx_driver = {
|
||||
.driver = {
|
||||
.name = "st,stm32-spdifrx",
|
||||
.of_match_table = stm32_spdifrx_ids,
|
||||
},
|
||||
.probe = stm32_spdifrx_probe,
|
||||
.remove = stm32_spdifrx_remove,
|
||||
};
|
||||
|
||||
module_platform_driver(stm32_spdifrx_driver);
|
||||
|
||||
MODULE_DESCRIPTION("STM32 Soc spdifrx Interface");
|
||||
MODULE_AUTHOR("Olivier Moysan, <olivier.moysan@st.com>");
|
||||
MODULE_ALIAS("platform:stm32-spdifrx");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue