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This patch implements SAI ASoC driver for STM32. Signed-off-by: olivier moysan <[email protected]> Signed-off-by: Mark Brown <[email protected]>
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menuconfig SND_SOC_STM32 | ||
tristate "STMicroelectronics STM32 SOC audio support" | ||
depends on ARCH_STM32 || COMPILE_TEST | ||
depends on SND_SOC | ||
select SND_SOC_GENERIC_DMAENGINE_PCM | ||
select REGMAP_MMIO | ||
help | ||
Say Y if you want to enable ASoC-support for STM32 |
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# SAI | ||
snd-soc-stm32-sai-sub-objs := stm32_sai_sub.o | ||
obj-$(CONFIG_SND_SOC_STM32) += snd-soc-stm32-sai-sub.o | ||
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snd-soc-stm32-sai-objs := stm32_sai.o | ||
obj-$(CONFIG_SND_SOC_STM32) += snd-soc-stm32-sai.o |
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/* | ||
* STM32 ALSA SoC Digital Audio Interface (SAI) driver. | ||
* | ||
* Copyright (C) 2016, STMicroelectronics - All Rights Reserved | ||
* Author(s): Olivier Moysan <[email protected]> for STMicroelectronics. | ||
* | ||
* License terms: GPL V2.0. | ||
* | ||
* This program is free software; you can redistribute it and/or modify it | ||
* under the terms of the GNU General Public License version 2 as published by | ||
* the Free Software Foundation. | ||
* | ||
* This program is distributed in the hope that it will be useful, but | ||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more | ||
* details. | ||
*/ | ||
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#include <linux/clk.h> | ||
#include <linux/delay.h> | ||
#include <linux/module.h> | ||
#include <linux/of_platform.h> | ||
#include <linux/reset.h> | ||
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#include <sound/dmaengine_pcm.h> | ||
#include <sound/core.h> | ||
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#include "stm32_sai.h" | ||
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static const struct of_device_id stm32_sai_ids[] = { | ||
{ .compatible = "st,stm32f4-sai", .data = (void *)SAI_STM32F4 }, | ||
{} | ||
}; | ||
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static int stm32_sai_probe(struct platform_device *pdev) | ||
{ | ||
struct device_node *np = pdev->dev.of_node; | ||
struct stm32_sai_data *sai; | ||
struct reset_control *rst; | ||
struct resource *res; | ||
void __iomem *base; | ||
const struct of_device_id *of_id; | ||
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sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL); | ||
if (!sai) | ||
return -ENOMEM; | ||
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | ||
base = devm_ioremap_resource(&pdev->dev, res); | ||
if (IS_ERR(base)) | ||
return PTR_ERR(base); | ||
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of_id = of_match_device(stm32_sai_ids, &pdev->dev); | ||
if (of_id) | ||
sai->version = (enum stm32_sai_version)of_id->data; | ||
else | ||
return -EINVAL; | ||
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sai->clk_x8k = devm_clk_get(&pdev->dev, "x8k"); | ||
if (IS_ERR(sai->clk_x8k)) { | ||
dev_err(&pdev->dev, "missing x8k parent clock\n"); | ||
return PTR_ERR(sai->clk_x8k); | ||
} | ||
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sai->clk_x11k = devm_clk_get(&pdev->dev, "x11k"); | ||
if (IS_ERR(sai->clk_x11k)) { | ||
dev_err(&pdev->dev, "missing x11k parent clock\n"); | ||
return PTR_ERR(sai->clk_x11k); | ||
} | ||
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/* init irqs */ | ||
sai->irq = platform_get_irq(pdev, 0); | ||
if (sai->irq < 0) { | ||
dev_err(&pdev->dev, "no irq for node %s\n", pdev->name); | ||
return sai->irq; | ||
} | ||
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/* reset */ | ||
rst = reset_control_get(&pdev->dev, NULL); | ||
if (!IS_ERR(rst)) { | ||
reset_control_assert(rst); | ||
udelay(2); | ||
reset_control_deassert(rst); | ||
} | ||
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sai->pdev = pdev; | ||
platform_set_drvdata(pdev, sai); | ||
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return of_platform_populate(np, NULL, NULL, &pdev->dev); | ||
} | ||
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static int stm32_sai_remove(struct platform_device *pdev) | ||
{ | ||
of_platform_depopulate(&pdev->dev); | ||
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return 0; | ||
} | ||
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MODULE_DEVICE_TABLE(of, stm32_sai_ids); | ||
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static struct platform_driver stm32_sai_driver = { | ||
.driver = { | ||
.name = "st,stm32-sai", | ||
.of_match_table = stm32_sai_ids, | ||
}, | ||
.probe = stm32_sai_probe, | ||
.remove = stm32_sai_remove, | ||
}; | ||
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module_platform_driver(stm32_sai_driver); | ||
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MODULE_DESCRIPTION("STM32 Soc SAI Interface"); | ||
MODULE_AUTHOR("Olivier Moysan, <[email protected]>"); | ||
MODULE_ALIAS("platform:st,stm32-sai"); | ||
MODULE_LICENSE("GPL v2"); |
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/* | ||
* STM32 ALSA SoC Digital Audio Interface (SAI) driver. | ||
* | ||
* Copyright (C) 2016, STMicroelectronics - All Rights Reserved | ||
* Author(s): Olivier Moysan <[email protected]> for STMicroelectronics. | ||
* | ||
* License terms: GPL V2.0. | ||
* | ||
* This program is free software; you can redistribute it and/or modify it | ||
* under the terms of the GNU General Public License version 2 as published by | ||
* the Free Software Foundation. | ||
* | ||
* This program is distributed in the hope that it will be useful, but | ||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more | ||
* details. | ||
*/ | ||
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/******************** SAI Register Map **************************************/ | ||
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/* common register */ | ||
#define STM_SAI_GCR 0x00 | ||
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/* Sub-block A&B registers offsets, relative to A&B sub-block addresses */ | ||
#define STM_SAI_CR1_REGX 0x00 /* A offset: 0x04. B offset: 0x24 */ | ||
#define STM_SAI_CR2_REGX 0x04 | ||
#define STM_SAI_FRCR_REGX 0x08 | ||
#define STM_SAI_SLOTR_REGX 0x0C | ||
#define STM_SAI_IMR_REGX 0x10 | ||
#define STM_SAI_SR_REGX 0x14 | ||
#define STM_SAI_CLRFR_REGX 0x18 | ||
#define STM_SAI_DR_REGX 0x1C | ||
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/******************** Bit definition for SAI_GCR register *******************/ | ||
#define SAI_GCR_SYNCIN_SHIFT 0 | ||
#define SAI_GCR_SYNCIN_MASK GENMASK(1, SAI_GCR_SYNCIN_SHIFT) | ||
#define SAI_GCR_SYNCIN_SET(x) ((x) << SAI_GCR_SYNCIN_SHIFT) | ||
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#define SAI_GCR_SYNCOUT_SHIFT 4 | ||
#define SAI_GCR_SYNCOUT_MASK GENMASK(5, SAI_GCR_SYNCOUT_SHIFT) | ||
#define SAI_GCR_SYNCOUT_SET(x) ((x) << SAI_GCR_SYNCOUT_SHIFT) | ||
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/******************* Bit definition for SAI_XCR1 register *******************/ | ||
#define SAI_XCR1_RX_TX_SHIFT 0 | ||
#define SAI_XCR1_RX_TX BIT(SAI_XCR1_RX_TX_SHIFT) | ||
#define SAI_XCR1_SLAVE_SHIFT 1 | ||
#define SAI_XCR1_SLAVE BIT(SAI_XCR1_SLAVE_SHIFT) | ||
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#define SAI_XCR1_PRTCFG_SHIFT 2 | ||
#define SAI_XCR1_PRTCFG_MASK GENMASK(3, SAI_XCR1_PRTCFG_SHIFT) | ||
#define SAI_XCR1_PRTCFG_SET(x) ((x) << SAI_XCR1_PRTCFG_SHIFT) | ||
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#define SAI_XCR1_DS_SHIFT 5 | ||
#define SAI_XCR1_DS_MASK GENMASK(7, SAI_XCR1_DS_SHIFT) | ||
#define SAI_XCR1_DS_SET(x) ((x) << SAI_XCR1_DS_SHIFT) | ||
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#define SAI_XCR1_LSBFIRST_SHIFT 8 | ||
#define SAI_XCR1_LSBFIRST BIT(SAI_XCR1_LSBFIRST_SHIFT) | ||
#define SAI_XCR1_CKSTR_SHIFT 9 | ||
#define SAI_XCR1_CKSTR BIT(SAI_XCR1_CKSTR_SHIFT) | ||
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#define SAI_XCR1_SYNCEN_SHIFT 10 | ||
#define SAI_XCR1_SYNCEN_MASK GENMASK(11, SAI_XCR1_SYNCEN_SHIFT) | ||
#define SAI_XCR1_SYNCEN_SET(x) ((x) << SAI_XCR1_SYNCEN_SHIFT) | ||
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#define SAI_XCR1_MONO_SHIFT 12 | ||
#define SAI_XCR1_MONO BIT(SAI_XCR1_MONO_SHIFT) | ||
#define SAI_XCR1_OUTDRIV_SHIFT 13 | ||
#define SAI_XCR1_OUTDRIV BIT(SAI_XCR1_OUTDRIV_SHIFT) | ||
#define SAI_XCR1_SAIEN_SHIFT 16 | ||
#define SAI_XCR1_SAIEN BIT(SAI_XCR1_SAIEN_SHIFT) | ||
#define SAI_XCR1_DMAEN_SHIFT 17 | ||
#define SAI_XCR1_DMAEN BIT(SAI_XCR1_DMAEN_SHIFT) | ||
#define SAI_XCR1_NODIV_SHIFT 19 | ||
#define SAI_XCR1_NODIV BIT(SAI_XCR1_NODIV_SHIFT) | ||
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#define SAI_XCR1_MCKDIV_SHIFT 20 | ||
#define SAI_XCR1_MCKDIV_WIDTH 4 | ||
#define SAI_XCR1_MCKDIV_MASK GENMASK(24, SAI_XCR1_MCKDIV_SHIFT) | ||
#define SAI_XCR1_MCKDIV_SET(x) ((x) << SAI_XCR1_MCKDIV_SHIFT) | ||
#define SAI_XCR1_MCKDIV_MAX ((1 << SAI_XCR1_MCKDIV_WIDTH) - 1) | ||
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#define SAI_XCR1_OSR_SHIFT 26 | ||
#define SAI_XCR1_OSR BIT(SAI_XCR1_OSR_SHIFT) | ||
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/******************* Bit definition for SAI_XCR2 register *******************/ | ||
#define SAI_XCR2_FTH_SHIFT 0 | ||
#define SAI_XCR2_FTH_MASK GENMASK(2, SAI_XCR2_FTH_SHIFT) | ||
#define SAI_XCR2_FTH_SET(x) ((x) << SAI_XCR2_FTH_SHIFT) | ||
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#define SAI_XCR2_FFLUSH_SHIFT 3 | ||
#define SAI_XCR2_FFLUSH BIT(SAI_XCR2_FFLUSH_SHIFT) | ||
#define SAI_XCR2_TRIS_SHIFT 4 | ||
#define SAI_XCR2_TRIS BIT(SAI_XCR2_TRIS_SHIFT) | ||
#define SAI_XCR2_MUTE_SHIFT 5 | ||
#define SAI_XCR2_MUTE BIT(SAI_XCR2_MUTE_SHIFT) | ||
#define SAI_XCR2_MUTEVAL_SHIFT 6 | ||
#define SAI_XCR2_MUTEVAL BIT(SAI_XCR2_MUTEVAL_SHIFT) | ||
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#define SAI_XCR2_MUTECNT_SHIFT 7 | ||
#define SAI_XCR2_MUTECNT_MASK GENMASK(12, SAI_XCR2_MUTECNT_SHIFT) | ||
#define SAI_XCR2_MUTECNT_SET(x) ((x) << SAI_XCR2_MUTECNT_SHIFT) | ||
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#define SAI_XCR2_CPL_SHIFT 13 | ||
#define SAI_XCR2_CPL BIT(SAI_XCR2_CPL_SHIFT) | ||
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#define SAI_XCR2_COMP_SHIFT 14 | ||
#define SAI_XCR2_COMP_MASK GENMASK(15, SAI_XCR2_COMP_SHIFT) | ||
#define SAI_XCR2_COMP_SET(x) ((x) << SAI_XCR2_COMP_SHIFT) | ||
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/****************** Bit definition for SAI_XFRCR register *******************/ | ||
#define SAI_XFRCR_FRL_SHIFT 0 | ||
#define SAI_XFRCR_FRL_MASK GENMASK(7, SAI_XFRCR_FRL_SHIFT) | ||
#define SAI_XFRCR_FRL_SET(x) ((x) << SAI_XFRCR_FRL_SHIFT) | ||
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#define SAI_XFRCR_FSALL_SHIFT 8 | ||
#define SAI_XFRCR_FSALL_MASK GENMASK(14, SAI_XFRCR_FSALL_SHIFT) | ||
#define SAI_XFRCR_FSALL_SET(x) ((x) << SAI_XFRCR_FSALL_SHIFT) | ||
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#define SAI_XFRCR_FSDEF_SHIFT 16 | ||
#define SAI_XFRCR_FSDEF BIT(SAI_XFRCR_FSDEF_SHIFT) | ||
#define SAI_XFRCR_FSPOL_SHIFT 17 | ||
#define SAI_XFRCR_FSPOL BIT(SAI_XFRCR_FSPOL_SHIFT) | ||
#define SAI_XFRCR_FSOFF_SHIFT 18 | ||
#define SAI_XFRCR_FSOFF BIT(SAI_XFRCR_FSOFF_SHIFT) | ||
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/****************** Bit definition for SAI_XSLOTR register ******************/ | ||
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#define SAI_XSLOTR_FBOFF_SHIFT 0 | ||
#define SAI_XSLOTR_FBOFF_MASK GENMASK(4, SAI_XSLOTR_FBOFF_SHIFT) | ||
#define SAI_XSLOTR_FBOFF_SET(x) ((x) << SAI_XSLOTR_FBOFF_SHIFT) | ||
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#define SAI_XSLOTR_SLOTSZ_SHIFT 6 | ||
#define SAI_XSLOTR_SLOTSZ_MASK GENMASK(7, SAI_XSLOTR_SLOTSZ_SHIFT) | ||
#define SAI_XSLOTR_SLOTSZ_SET(x) ((x) << SAI_XSLOTR_SLOTSZ_SHIFT) | ||
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#define SAI_XSLOTR_NBSLOT_SHIFT 8 | ||
#define SAI_XSLOTR_NBSLOT_MASK GENMASK(11, SAI_XSLOTR_NBSLOT_SHIFT) | ||
#define SAI_XSLOTR_NBSLOT_SET(x) ((x) << SAI_XSLOTR_NBSLOT_SHIFT) | ||
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#define SAI_XSLOTR_SLOTEN_SHIFT 16 | ||
#define SAI_XSLOTR_SLOTEN_WIDTH 16 | ||
#define SAI_XSLOTR_SLOTEN_MASK GENMASK(31, SAI_XSLOTR_SLOTEN_SHIFT) | ||
#define SAI_XSLOTR_SLOTEN_SET(x) ((x) << SAI_XSLOTR_SLOTEN_SHIFT) | ||
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/******************* Bit definition for SAI_XIMR register *******************/ | ||
#define SAI_XIMR_OVRUDRIE BIT(0) | ||
#define SAI_XIMR_MUTEDETIE BIT(1) | ||
#define SAI_XIMR_WCKCFGIE BIT(2) | ||
#define SAI_XIMR_FREQIE BIT(3) | ||
#define SAI_XIMR_CNRDYIE BIT(4) | ||
#define SAI_XIMR_AFSDETIE BIT(5) | ||
#define SAI_XIMR_LFSDETIE BIT(6) | ||
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#define SAI_XIMR_SHIFT 0 | ||
#define SAI_XIMR_MASK GENMASK(6, SAI_XIMR_SHIFT) | ||
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/******************** Bit definition for SAI_XSR register *******************/ | ||
#define SAI_XSR_OVRUDR BIT(0) | ||
#define SAI_XSR_MUTEDET BIT(1) | ||
#define SAI_XSR_WCKCFG BIT(2) | ||
#define SAI_XSR_FREQ BIT(3) | ||
#define SAI_XSR_CNRDY BIT(4) | ||
#define SAI_XSR_AFSDET BIT(5) | ||
#define SAI_XSR_LFSDET BIT(6) | ||
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#define SAI_XSR_SHIFT 0 | ||
#define SAI_XSR_MASK GENMASK(6, SAI_XSR_SHIFT) | ||
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/****************** Bit definition for SAI_XCLRFR register ******************/ | ||
#define SAI_XCLRFR_COVRUDR BIT(0) | ||
#define SAI_XCLRFR_CMUTEDET BIT(1) | ||
#define SAI_XCLRFR_CWCKCFG BIT(2) | ||
#define SAI_XCLRFR_CFREQ BIT(3) | ||
#define SAI_XCLRFR_CCNRDY BIT(4) | ||
#define SAI_XCLRFR_CAFSDET BIT(5) | ||
#define SAI_XCLRFR_CLFSDET BIT(6) | ||
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#define SAI_XCLRFR_SHIFT 0 | ||
#define SAI_XCLRFR_MASK GENMASK(6, SAI_XCLRFR_SHIFT) | ||
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enum stm32_sai_version { | ||
SAI_STM32F4 | ||
}; | ||
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/** | ||
* struct stm32_sai_data - private data of SAI instance driver | ||
* @pdev: device data pointer | ||
* @clk_x8k: SAI parent clock for sampling frequencies multiple of 8kHz | ||
* @clk_x11k: SAI parent clock for sampling frequencies multiple of 11kHz | ||
* @version: SOC version | ||
* @irq: SAI interrupt line | ||
*/ | ||
struct stm32_sai_data { | ||
struct platform_device *pdev; | ||
struct clk *clk_x8k; | ||
struct clk *clk_x11k; | ||
int version; | ||
int irq; | ||
}; |
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