303 lines
10 KiB
C
303 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* STM32 ALSA SoC Digital Audio Interface (SAI) driver.
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*
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* Copyright (C) 2016, 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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#include <linux/bitfield.h>
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/******************** SAI Register Map **************************************/
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/* Global configuration register */
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#define STM_SAI_GCR 0x00
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/* Sub-block A&B registers offsets, relative to A&B sub-block addresses */
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#define STM_SAI_CR1_REGX 0x00 /* A offset: 0x04. B offset: 0x24 */
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#define STM_SAI_CR2_REGX 0x04
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#define STM_SAI_FRCR_REGX 0x08
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#define STM_SAI_SLOTR_REGX 0x0C
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#define STM_SAI_IMR_REGX 0x10
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#define STM_SAI_SR_REGX 0x14
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#define STM_SAI_CLRFR_REGX 0x18
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#define STM_SAI_DR_REGX 0x1C
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/* Sub-block A registers, relative to sub-block A address */
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#define STM_SAI_PDMCR_REGX 0x40
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#define STM_SAI_PDMLY_REGX 0x44
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/* Hardware configuration registers */
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#define STM_SAI_HWCFGR 0x3F0
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#define STM_SAI_VERR 0x3F4
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#define STM_SAI_IDR 0x3F8
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#define STM_SAI_SIDR 0x3FC
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/******************** Bit definition for SAI_GCR register *******************/
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#define SAI_GCR_SYNCIN_SHIFT 0
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#define SAI_GCR_SYNCIN_WDTH 2
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#define SAI_GCR_SYNCIN_MASK GENMASK(1, SAI_GCR_SYNCIN_SHIFT)
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#define SAI_GCR_SYNCIN_MAX FIELD_GET(SAI_GCR_SYNCIN_MASK,\
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SAI_GCR_SYNCIN_MASK)
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#define SAI_GCR_SYNCOUT_SHIFT 4
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#define SAI_GCR_SYNCOUT_MASK GENMASK(5, SAI_GCR_SYNCOUT_SHIFT)
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/******************* Bit definition for SAI_XCR1 register *******************/
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#define SAI_XCR1_RX_TX_SHIFT 0
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#define SAI_XCR1_RX_TX BIT(SAI_XCR1_RX_TX_SHIFT)
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#define SAI_XCR1_SLAVE_SHIFT 1
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#define SAI_XCR1_SLAVE BIT(SAI_XCR1_SLAVE_SHIFT)
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#define SAI_XCR1_PRTCFG_SHIFT 2
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#define SAI_XCR1_PRTCFG_MASK GENMASK(3, SAI_XCR1_PRTCFG_SHIFT)
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#define SAI_XCR1_PRTCFG_SET(x) ((x) << SAI_XCR1_PRTCFG_SHIFT)
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#define SAI_XCR1_DS_SHIFT 5
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#define SAI_XCR1_DS_MASK GENMASK(7, SAI_XCR1_DS_SHIFT)
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#define SAI_XCR1_DS_SET(x) ((x) << SAI_XCR1_DS_SHIFT)
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#define SAI_XCR1_LSBFIRST_SHIFT 8
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#define SAI_XCR1_LSBFIRST BIT(SAI_XCR1_LSBFIRST_SHIFT)
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#define SAI_XCR1_CKSTR_SHIFT 9
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#define SAI_XCR1_CKSTR BIT(SAI_XCR1_CKSTR_SHIFT)
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#define SAI_XCR1_SYNCEN_SHIFT 10
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#define SAI_XCR1_SYNCEN_MASK GENMASK(11, SAI_XCR1_SYNCEN_SHIFT)
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#define SAI_XCR1_SYNCEN_SET(x) ((x) << SAI_XCR1_SYNCEN_SHIFT)
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#define SAI_XCR1_MONO_SHIFT 12
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#define SAI_XCR1_MONO BIT(SAI_XCR1_MONO_SHIFT)
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#define SAI_XCR1_OUTDRIV_SHIFT 13
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#define SAI_XCR1_OUTDRIV BIT(SAI_XCR1_OUTDRIV_SHIFT)
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#define SAI_XCR1_SAIEN_SHIFT 16
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#define SAI_XCR1_SAIEN BIT(SAI_XCR1_SAIEN_SHIFT)
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#define SAI_XCR1_DMAEN_SHIFT 17
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#define SAI_XCR1_DMAEN BIT(SAI_XCR1_DMAEN_SHIFT)
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#define SAI_XCR1_NODIV_SHIFT 19
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#define SAI_XCR1_NODIV BIT(SAI_XCR1_NODIV_SHIFT)
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#define SAI_XCR1_MCKDIV_SHIFT 20
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#define SAI_XCR1_MCKDIV_WIDTH(x) (((x) == STM_SAI_STM32F4) ? 4 : 6)
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#define SAI_XCR1_MCKDIV_MASK(x) GENMASK((SAI_XCR1_MCKDIV_SHIFT + (x) - 1),\
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SAI_XCR1_MCKDIV_SHIFT)
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#define SAI_XCR1_MCKDIV_SET(x) ((x) << SAI_XCR1_MCKDIV_SHIFT)
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#define SAI_XCR1_MCKDIV_MAX(x) ((1 << SAI_XCR1_MCKDIV_WIDTH(x)) - 1)
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#define SAI_XCR1_OSR_SHIFT 26
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#define SAI_XCR1_OSR BIT(SAI_XCR1_OSR_SHIFT)
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#define SAI_XCR1_MCKEN_SHIFT 27
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#define SAI_XCR1_MCKEN BIT(SAI_XCR1_MCKEN_SHIFT)
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/******************* Bit definition for SAI_XCR2 register *******************/
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#define SAI_XCR2_FTH_SHIFT 0
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#define SAI_XCR2_FTH_MASK GENMASK(2, SAI_XCR2_FTH_SHIFT)
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#define SAI_XCR2_FTH_SET(x) ((x) << SAI_XCR2_FTH_SHIFT)
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#define SAI_XCR2_FFLUSH_SHIFT 3
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#define SAI_XCR2_FFLUSH BIT(SAI_XCR2_FFLUSH_SHIFT)
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#define SAI_XCR2_TRIS_SHIFT 4
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#define SAI_XCR2_TRIS BIT(SAI_XCR2_TRIS_SHIFT)
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#define SAI_XCR2_MUTE_SHIFT 5
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#define SAI_XCR2_MUTE BIT(SAI_XCR2_MUTE_SHIFT)
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#define SAI_XCR2_MUTEVAL_SHIFT 6
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#define SAI_XCR2_MUTEVAL BIT(SAI_XCR2_MUTEVAL_SHIFT)
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#define SAI_XCR2_MUTECNT_SHIFT 7
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#define SAI_XCR2_MUTECNT_MASK GENMASK(12, SAI_XCR2_MUTECNT_SHIFT)
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#define SAI_XCR2_MUTECNT_SET(x) ((x) << SAI_XCR2_MUTECNT_SHIFT)
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#define SAI_XCR2_CPL_SHIFT 13
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#define SAI_XCR2_CPL BIT(SAI_XCR2_CPL_SHIFT)
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#define SAI_XCR2_COMP_SHIFT 14
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#define SAI_XCR2_COMP_MASK GENMASK(15, SAI_XCR2_COMP_SHIFT)
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#define SAI_XCR2_COMP_SET(x) ((x) << SAI_XCR2_COMP_SHIFT)
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/****************** Bit definition for SAI_XFRCR register *******************/
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#define SAI_XFRCR_FRL_SHIFT 0
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#define SAI_XFRCR_FRL_MASK GENMASK(7, SAI_XFRCR_FRL_SHIFT)
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#define SAI_XFRCR_FRL_SET(x) ((x) << SAI_XFRCR_FRL_SHIFT)
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#define SAI_XFRCR_FSALL_SHIFT 8
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#define SAI_XFRCR_FSALL_MASK GENMASK(14, SAI_XFRCR_FSALL_SHIFT)
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#define SAI_XFRCR_FSALL_SET(x) ((x) << SAI_XFRCR_FSALL_SHIFT)
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#define SAI_XFRCR_FSDEF_SHIFT 16
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#define SAI_XFRCR_FSDEF BIT(SAI_XFRCR_FSDEF_SHIFT)
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#define SAI_XFRCR_FSPOL_SHIFT 17
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#define SAI_XFRCR_FSPOL BIT(SAI_XFRCR_FSPOL_SHIFT)
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#define SAI_XFRCR_FSOFF_SHIFT 18
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#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
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#define SAI_XSLOTR_FBOFF_MASK GENMASK(4, SAI_XSLOTR_FBOFF_SHIFT)
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#define SAI_XSLOTR_FBOFF_SET(x) ((x) << SAI_XSLOTR_FBOFF_SHIFT)
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#define SAI_XSLOTR_SLOTSZ_SHIFT 6
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#define SAI_XSLOTR_SLOTSZ_MASK GENMASK(7, SAI_XSLOTR_SLOTSZ_SHIFT)
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#define SAI_XSLOTR_SLOTSZ_SET(x) ((x) << SAI_XSLOTR_SLOTSZ_SHIFT)
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#define SAI_XSLOTR_NBSLOT_SHIFT 8
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#define SAI_XSLOTR_NBSLOT_MASK GENMASK(11, SAI_XSLOTR_NBSLOT_SHIFT)
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#define SAI_XSLOTR_NBSLOT_SET(x) ((x) << SAI_XSLOTR_NBSLOT_SHIFT)
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#define SAI_XSLOTR_SLOTEN_SHIFT 16
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#define SAI_XSLOTR_SLOTEN_WIDTH 16
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#define SAI_XSLOTR_SLOTEN_MASK GENMASK(31, SAI_XSLOTR_SLOTEN_SHIFT)
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#define SAI_XSLOTR_SLOTEN_SET(x) ((x) << SAI_XSLOTR_SLOTEN_SHIFT)
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/******************* Bit definition for SAI_XIMR register *******************/
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#define SAI_XIMR_OVRUDRIE BIT(0)
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#define SAI_XIMR_MUTEDETIE BIT(1)
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#define SAI_XIMR_WCKCFGIE BIT(2)
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#define SAI_XIMR_FREQIE BIT(3)
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#define SAI_XIMR_CNRDYIE BIT(4)
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#define SAI_XIMR_AFSDETIE BIT(5)
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#define SAI_XIMR_LFSDETIE BIT(6)
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#define SAI_XIMR_SHIFT 0
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#define SAI_XIMR_MASK GENMASK(6, SAI_XIMR_SHIFT)
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/******************** Bit definition for SAI_XSR register *******************/
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#define SAI_XSR_OVRUDR BIT(0)
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#define SAI_XSR_MUTEDET BIT(1)
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#define SAI_XSR_WCKCFG BIT(2)
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#define SAI_XSR_FREQ BIT(3)
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#define SAI_XSR_CNRDY BIT(4)
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#define SAI_XSR_AFSDET BIT(5)
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#define SAI_XSR_LFSDET BIT(6)
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#define SAI_XSR_SHIFT 0
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#define SAI_XSR_MASK GENMASK(6, SAI_XSR_SHIFT)
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/****************** Bit definition for SAI_XCLRFR register ******************/
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#define SAI_XCLRFR_COVRUDR BIT(0)
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#define SAI_XCLRFR_CMUTEDET BIT(1)
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#define SAI_XCLRFR_CWCKCFG BIT(2)
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#define SAI_XCLRFR_CFREQ BIT(3)
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#define SAI_XCLRFR_CCNRDY BIT(4)
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#define SAI_XCLRFR_CAFSDET BIT(5)
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#define SAI_XCLRFR_CLFSDET BIT(6)
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#define SAI_XCLRFR_SHIFT 0
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#define SAI_XCLRFR_MASK GENMASK(6, SAI_XCLRFR_SHIFT)
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/****************** Bit definition for SAI_PDMCR register ******************/
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#define SAI_PDMCR_PDMEN BIT(0)
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#define SAI_PDMCR_MICNBR_SHIFT 4
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#define SAI_PDMCR_MICNBR_MASK GENMASK(5, SAI_PDMCR_MICNBR_SHIFT)
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#define SAI_PDMCR_MICNBR_SET(x) ((x) << SAI_PDMCR_MICNBR_SHIFT)
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#define SAI_PDMCR_CKEN1 BIT(8)
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#define SAI_PDMCR_CKEN2 BIT(9)
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#define SAI_PDMCR_CKEN3 BIT(10)
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#define SAI_PDMCR_CKEN4 BIT(11)
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/****************** Bit definition for (SAI_PDMDLY register ****************/
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#define SAI_PDMDLY_1L_SHIFT 0
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#define SAI_PDMDLY_1L_MASK GENMASK(2, SAI_PDMDLY_1L_SHIFT)
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#define SAI_PDMDLY_1L_WIDTH 3
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#define SAI_PDMDLY_1R_SHIFT 4
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#define SAI_PDMDLY_1R_MASK GENMASK(6, SAI_PDMDLY_1R_SHIFT)
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#define SAI_PDMDLY_1R_WIDTH 3
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#define SAI_PDMDLY_2L_SHIFT 8
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#define SAI_PDMDLY_2L_MASK GENMASK(10, SAI_PDMDLY_2L_SHIFT)
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#define SAI_PDMDLY_2L_WIDTH 3
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#define SAI_PDMDLY_2R_SHIFT 12
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#define SAI_PDMDLY_2R_MASK GENMASK(14, SAI_PDMDLY_2R_SHIFT)
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#define SAI_PDMDLY_2R_WIDTH 3
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#define SAI_PDMDLY_3L_SHIFT 16
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#define SAI_PDMDLY_3L_MASK GENMASK(18, SAI_PDMDLY_3L_SHIFT)
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#define SAI_PDMDLY_3L_WIDTH 3
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#define SAI_PDMDLY_3R_SHIFT 20
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#define SAI_PDMDLY_3R_MASK GENMASK(22, SAI_PDMDLY_3R_SHIFT)
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#define SAI_PDMDLY_3R_WIDTH 3
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#define SAI_PDMDLY_4L_SHIFT 24
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#define SAI_PDMDLY_4L_MASK GENMASK(26, SAI_PDMDLY_4L_SHIFT)
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#define SAI_PDMDLY_4L_WIDTH 3
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#define SAI_PDMDLY_4R_SHIFT 28
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#define SAI_PDMDLY_4R_MASK GENMASK(30, SAI_PDMDLY_4R_SHIFT)
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#define SAI_PDMDLY_4R_WIDTH 3
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/* Registers below apply to SAI version 2.1 and more */
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/* Bit definition for SAI_HWCFGR register */
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#define SAI_HWCFGR_FIFO_SIZE GENMASK(7, 0)
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#define SAI_HWCFGR_SPDIF_PDM GENMASK(11, 8)
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#define SAI_HWCFGR_REGOUT GENMASK(19, 12)
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/* Bit definition for SAI_VERR register */
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#define SAI_VERR_MIN_MASK GENMASK(3, 0)
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#define SAI_VERR_MAJ_MASK GENMASK(7, 4)
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/* Bit definition for SAI_IDR register */
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#define SAI_IDR_ID_MASK GENMASK(31, 0)
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/* Bit definition for SAI_SIDR register */
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#define SAI_SIDR_ID_MASK GENMASK(31, 0)
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#define SAI_IPIDR_NUMBER 0x00130031
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/* SAI version numbers are 1.x for F4. Major version number set to 1 for F4 */
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#define STM_SAI_STM32F4 BIT(4)
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/* Dummy version number for H7 socs and next */
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#define STM_SAI_STM32H7 0x0
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#define STM_SAI_IS_F4(ip) ((ip)->conf.version == STM_SAI_STM32F4)
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#define STM_SAI_HAS_SPDIF_PDM(ip)\
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((ip)->pdata->conf.has_spdif_pdm)
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enum stm32_sai_syncout {
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STM_SAI_SYNC_OUT_NONE,
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STM_SAI_SYNC_OUT_A,
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STM_SAI_SYNC_OUT_B,
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};
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/**
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* struct stm32_sai_conf - SAI configuration
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* @version: SAI version
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* @fifo_size: SAI fifo size as words number
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* @has_spdif_pdm: SAI S/PDIF and PDM features support flag
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*/
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struct stm32_sai_conf {
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u32 version;
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u32 fifo_size;
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bool has_spdif_pdm;
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};
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/**
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* struct stm32_sai_data - private data of SAI instance driver
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* @pdev: device data pointer
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* @base: common register bank virtual base address
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* @pclk: SAI bus clock
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* @clk_x8k: SAI parent clock for sampling frequencies multiple of 8kHz
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* @clk_x11k: SAI parent clock for sampling frequencies multiple of 11kHz
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* @conf: SAI hardware capabitilites
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* @irq: SAI interrupt line
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* @set_sync: pointer to synchro mode configuration callback
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* @gcr: SAI Global Configuration Register
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*/
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struct stm32_sai_data {
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struct platform_device *pdev;
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void __iomem *base;
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struct clk *pclk;
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struct clk *clk_x8k;
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struct clk *clk_x11k;
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struct stm32_sai_conf conf;
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int irq;
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int (*set_sync)(struct stm32_sai_data *sai,
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struct device_node *np_provider, int synco, int synci);
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u32 gcr;
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};
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