| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * This file is part of STM32 DFSDM driver |
| * |
| * Copyright (C) 2017, STMicroelectronics - All Rights Reserved |
| * Author(s): Arnaud Pouliquen <arnaud.pouliquen@st.com>. |
| */ |
| |
| #ifndef MDF_STM32_DFSDM__H |
| #define MDF_STM32_DFSDM__H |
| |
| #include <linux/bitfield.h> |
| |
| /* |
| * STM32 DFSDM - global register map |
| * ________________________________________________________ |
| * | Offset | Registers block | |
| * -------------------------------------------------------- |
| * | 0x000 | CHANNEL 0 + COMMON CHANNEL FIELDS | |
| * -------------------------------------------------------- |
| * | 0x020 | CHANNEL 1 | |
| * -------------------------------------------------------- |
| * | ... | ..... | |
| * -------------------------------------------------------- |
| * | 0x0E0 | CHANNEL 7 | |
| * -------------------------------------------------------- |
| * | 0x100 | FILTER 0 + COMMON FILTER FIELDs | |
| * -------------------------------------------------------- |
| * | 0x200 | FILTER 1 | |
| * -------------------------------------------------------- |
| * | 0x300 | FILTER 2 | |
| * -------------------------------------------------------- |
| * | 0x400 | FILTER 3 | |
| * -------------------------------------------------------- |
| */ |
| |
| /* |
| * Channels register definitions |
| */ |
| #define DFSDM_CHCFGR1(y) ((y) * 0x20 + 0x00) |
| #define DFSDM_CHCFGR2(y) ((y) * 0x20 + 0x04) |
| #define DFSDM_AWSCDR(y) ((y) * 0x20 + 0x08) |
| #define DFSDM_CHWDATR(y) ((y) * 0x20 + 0x0C) |
| #define DFSDM_CHDATINR(y) ((y) * 0x20 + 0x10) |
| |
| /* CHCFGR1: Channel configuration register 1 */ |
| #define DFSDM_CHCFGR1_SITP_MASK GENMASK(1, 0) |
| #define DFSDM_CHCFGR1_SITP(v) FIELD_PREP(DFSDM_CHCFGR1_SITP_MASK, v) |
| #define DFSDM_CHCFGR1_SPICKSEL_MASK GENMASK(3, 2) |
| #define DFSDM_CHCFGR1_SPICKSEL(v) FIELD_PREP(DFSDM_CHCFGR1_SPICKSEL_MASK, v) |
| #define DFSDM_CHCFGR1_SCDEN_MASK BIT(5) |
| #define DFSDM_CHCFGR1_SCDEN(v) FIELD_PREP(DFSDM_CHCFGR1_SCDEN_MASK, v) |
| #define DFSDM_CHCFGR1_CKABEN_MASK BIT(6) |
| #define DFSDM_CHCFGR1_CKABEN(v) FIELD_PREP(DFSDM_CHCFGR1_CKABEN_MASK, v) |
| #define DFSDM_CHCFGR1_CHEN_MASK BIT(7) |
| #define DFSDM_CHCFGR1_CHEN(v) FIELD_PREP(DFSDM_CHCFGR1_CHEN_MASK, v) |
| #define DFSDM_CHCFGR1_CHINSEL_MASK BIT(8) |
| #define DFSDM_CHCFGR1_CHINSEL(v) FIELD_PREP(DFSDM_CHCFGR1_CHINSEL_MASK, v) |
| #define DFSDM_CHCFGR1_DATMPX_MASK GENMASK(13, 12) |
| #define DFSDM_CHCFGR1_DATMPX(v) FIELD_PREP(DFSDM_CHCFGR1_DATMPX_MASK, v) |
| #define DFSDM_CHCFGR1_DATPACK_MASK GENMASK(15, 14) |
| #define DFSDM_CHCFGR1_DATPACK(v) FIELD_PREP(DFSDM_CHCFGR1_DATPACK_MASK, v) |
| #define DFSDM_CHCFGR1_CKOUTDIV_MASK GENMASK(23, 16) |
| #define DFSDM_CHCFGR1_CKOUTDIV(v) FIELD_PREP(DFSDM_CHCFGR1_CKOUTDIV_MASK, v) |
| #define DFSDM_CHCFGR1_CKOUTSRC_MASK BIT(30) |
| #define DFSDM_CHCFGR1_CKOUTSRC(v) FIELD_PREP(DFSDM_CHCFGR1_CKOUTSRC_MASK, v) |
| #define DFSDM_CHCFGR1_DFSDMEN_MASK BIT(31) |
| #define DFSDM_CHCFGR1_DFSDMEN(v) FIELD_PREP(DFSDM_CHCFGR1_DFSDMEN_MASK, v) |
| |
| /* CHCFGR2: Channel configuration register 2 */ |
| #define DFSDM_CHCFGR2_DTRBS_MASK GENMASK(7, 3) |
| #define DFSDM_CHCFGR2_DTRBS(v) FIELD_PREP(DFSDM_CHCFGR2_DTRBS_MASK, v) |
| #define DFSDM_CHCFGR2_OFFSET_MASK GENMASK(31, 8) |
| #define DFSDM_CHCFGR2_OFFSET(v) FIELD_PREP(DFSDM_CHCFGR2_OFFSET_MASK, v) |
| |
| /* AWSCDR: Channel analog watchdog and short circuit detector */ |
| #define DFSDM_AWSCDR_SCDT_MASK GENMASK(7, 0) |
| #define DFSDM_AWSCDR_SCDT(v) FIELD_PREP(DFSDM_AWSCDR_SCDT_MASK, v) |
| #define DFSDM_AWSCDR_BKSCD_MASK GENMASK(15, 12) |
| #define DFSDM_AWSCDR_BKSCD(v) FIELD_PREP(DFSDM_AWSCDR_BKSCD_MASK, v) |
| #define DFSDM_AWSCDR_AWFOSR_MASK GENMASK(20, 16) |
| #define DFSDM_AWSCDR_AWFOSR(v) FIELD_PREP(DFSDM_AWSCDR_AWFOSR_MASK, v) |
| #define DFSDM_AWSCDR_AWFORD_MASK GENMASK(23, 22) |
| #define DFSDM_AWSCDR_AWFORD(v) FIELD_PREP(DFSDM_AWSCDR_AWFORD_MASK, v) |
| |
| /* |
| * Filters register definitions |
| */ |
| #define DFSDM_FILTER_BASE_ADR 0x100 |
| #define DFSDM_FILTER_REG_MASK 0x7F |
| #define DFSDM_FILTER_X_BASE_ADR(x) ((x) * 0x80 + DFSDM_FILTER_BASE_ADR) |
| |
| #define DFSDM_CR1(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x00) |
| #define DFSDM_CR2(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x04) |
| #define DFSDM_ISR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x08) |
| #define DFSDM_ICR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x0C) |
| #define DFSDM_JCHGR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x10) |
| #define DFSDM_FCR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x14) |
| #define DFSDM_JDATAR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x18) |
| #define DFSDM_RDATAR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x1C) |
| #define DFSDM_AWHTR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x20) |
| #define DFSDM_AWLTR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x24) |
| #define DFSDM_AWSR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x28) |
| #define DFSDM_AWCFR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x2C) |
| #define DFSDM_EXMAX(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x30) |
| #define DFSDM_EXMIN(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x34) |
| #define DFSDM_CNVTIMR(x) (DFSDM_FILTER_X_BASE_ADR(x) + 0x38) |
| |
| /* CR1 Control register 1 */ |
| #define DFSDM_CR1_DFEN_MASK BIT(0) |
| #define DFSDM_CR1_DFEN(v) FIELD_PREP(DFSDM_CR1_DFEN_MASK, v) |
| #define DFSDM_CR1_JSWSTART_MASK BIT(1) |
| #define DFSDM_CR1_JSWSTART(v) FIELD_PREP(DFSDM_CR1_JSWSTART_MASK, v) |
| #define DFSDM_CR1_JSYNC_MASK BIT(3) |
| #define DFSDM_CR1_JSYNC(v) FIELD_PREP(DFSDM_CR1_JSYNC_MASK, v) |
| #define DFSDM_CR1_JSCAN_MASK BIT(4) |
| #define DFSDM_CR1_JSCAN(v) FIELD_PREP(DFSDM_CR1_JSCAN_MASK, v) |
| #define DFSDM_CR1_JDMAEN_MASK BIT(5) |
| #define DFSDM_CR1_JDMAEN(v) FIELD_PREP(DFSDM_CR1_JDMAEN_MASK, v) |
| #define DFSDM_CR1_JEXTSEL_MASK GENMASK(12, 8) |
| #define DFSDM_CR1_JEXTSEL(v) FIELD_PREP(DFSDM_CR1_JEXTSEL_MASK, v) |
| #define DFSDM_CR1_JEXTEN_MASK GENMASK(14, 13) |
| #define DFSDM_CR1_JEXTEN(v) FIELD_PREP(DFSDM_CR1_JEXTEN_MASK, v) |
| #define DFSDM_CR1_RSWSTART_MASK BIT(17) |
| #define DFSDM_CR1_RSWSTART(v) FIELD_PREP(DFSDM_CR1_RSWSTART_MASK, v) |
| #define DFSDM_CR1_RCONT_MASK BIT(18) |
| #define DFSDM_CR1_RCONT(v) FIELD_PREP(DFSDM_CR1_RCONT_MASK, v) |
| #define DFSDM_CR1_RSYNC_MASK BIT(19) |
| #define DFSDM_CR1_RSYNC(v) FIELD_PREP(DFSDM_CR1_RSYNC_MASK, v) |
| #define DFSDM_CR1_RDMAEN_MASK BIT(21) |
| #define DFSDM_CR1_RDMAEN(v) FIELD_PREP(DFSDM_CR1_RDMAEN_MASK, v) |
| #define DFSDM_CR1_RCH_MASK GENMASK(26, 24) |
| #define DFSDM_CR1_RCH(v) FIELD_PREP(DFSDM_CR1_RCH_MASK, v) |
| #define DFSDM_CR1_FAST_MASK BIT(29) |
| #define DFSDM_CR1_FAST(v) FIELD_PREP(DFSDM_CR1_FAST_MASK, v) |
| #define DFSDM_CR1_AWFSEL_MASK BIT(30) |
| #define DFSDM_CR1_AWFSEL(v) FIELD_PREP(DFSDM_CR1_AWFSEL_MASK, v) |
| |
| /* CR2: Control register 2 */ |
| #define DFSDM_CR2_IE_MASK GENMASK(6, 0) |
| #define DFSDM_CR2_IE(v) FIELD_PREP(DFSDM_CR2_IE_MASK, v) |
| #define DFSDM_CR2_JEOCIE_MASK BIT(0) |
| #define DFSDM_CR2_JEOCIE(v) FIELD_PREP(DFSDM_CR2_JEOCIE_MASK, v) |
| #define DFSDM_CR2_REOCIE_MASK BIT(1) |
| #define DFSDM_CR2_REOCIE(v) FIELD_PREP(DFSDM_CR2_REOCIE_MASK, v) |
| #define DFSDM_CR2_JOVRIE_MASK BIT(2) |
| #define DFSDM_CR2_JOVRIE(v) FIELD_PREP(DFSDM_CR2_JOVRIE_MASK, v) |
| #define DFSDM_CR2_ROVRIE_MASK BIT(3) |
| #define DFSDM_CR2_ROVRIE(v) FIELD_PREP(DFSDM_CR2_ROVRIE_MASK, v) |
| #define DFSDM_CR2_AWDIE_MASK BIT(4) |
| #define DFSDM_CR2_AWDIE(v) FIELD_PREP(DFSDM_CR2_AWDIE_MASK, v) |
| #define DFSDM_CR2_SCDIE_MASK BIT(5) |
| #define DFSDM_CR2_SCDIE(v) FIELD_PREP(DFSDM_CR2_SCDIE_MASK, v) |
| #define DFSDM_CR2_CKABIE_MASK BIT(6) |
| #define DFSDM_CR2_CKABIE(v) FIELD_PREP(DFSDM_CR2_CKABIE_MASK, v) |
| #define DFSDM_CR2_EXCH_MASK GENMASK(15, 8) |
| #define DFSDM_CR2_EXCH(v) FIELD_PREP(DFSDM_CR2_EXCH_MASK, v) |
| #define DFSDM_CR2_AWDCH_MASK GENMASK(23, 16) |
| #define DFSDM_CR2_AWDCH(v) FIELD_PREP(DFSDM_CR2_AWDCH_MASK, v) |
| |
| /* ISR: Interrupt status register */ |
| #define DFSDM_ISR_JEOCF_MASK BIT(0) |
| #define DFSDM_ISR_JEOCF(v) FIELD_PREP(DFSDM_ISR_JEOCF_MASK, v) |
| #define DFSDM_ISR_REOCF_MASK BIT(1) |
| #define DFSDM_ISR_REOCF(v) FIELD_PREP(DFSDM_ISR_REOCF_MASK, v) |
| #define DFSDM_ISR_JOVRF_MASK BIT(2) |
| #define DFSDM_ISR_JOVRF(v) FIELD_PREP(DFSDM_ISR_JOVRF_MASK, v) |
| #define DFSDM_ISR_ROVRF_MASK BIT(3) |
| #define DFSDM_ISR_ROVRF(v) FIELD_PREP(DFSDM_ISR_ROVRF_MASK, v) |
| #define DFSDM_ISR_AWDF_MASK BIT(4) |
| #define DFSDM_ISR_AWDF(v) FIELD_PREP(DFSDM_ISR_AWDF_MASK, v) |
| #define DFSDM_ISR_JCIP_MASK BIT(13) |
| #define DFSDM_ISR_JCIP(v) FIELD_PREP(DFSDM_ISR_JCIP_MASK, v) |
| #define DFSDM_ISR_RCIP_MASK BIT(14) |
| #define DFSDM_ISR_RCIP(v) FIELD_PREP(DFSDM_ISR_RCIP, v) |
| #define DFSDM_ISR_CKABF_MASK GENMASK(23, 16) |
| #define DFSDM_ISR_CKABF(v) FIELD_PREP(DFSDM_ISR_CKABF_MASK, v) |
| #define DFSDM_ISR_SCDF_MASK GENMASK(31, 24) |
| #define DFSDM_ISR_SCDF(v) FIELD_PREP(DFSDM_ISR_SCDF_MASK, v) |
| |
| /* ICR: Interrupt flag clear register */ |
| #define DFSDM_ICR_CLRJOVRF_MASK BIT(2) |
| #define DFSDM_ICR_CLRJOVRF(v) FIELD_PREP(DFSDM_ICR_CLRJOVRF_MASK, v) |
| #define DFSDM_ICR_CLRROVRF_MASK BIT(3) |
| #define DFSDM_ICR_CLRROVRF(v) FIELD_PREP(DFSDM_ICR_CLRROVRF_MASK, v) |
| #define DFSDM_ICR_CLRCKABF_MASK GENMASK(23, 16) |
| #define DFSDM_ICR_CLRCKABF(v) FIELD_PREP(DFSDM_ICR_CLRCKABF_MASK, v) |
| #define DFSDM_ICR_CLRCKABF_CH_MASK(y) BIT(16 + (y)) |
| #define DFSDM_ICR_CLRCKABF_CH(v, y) \ |
| (((v) << (16 + (y))) & DFSDM_ICR_CLRCKABF_CH_MASK(y)) |
| #define DFSDM_ICR_CLRSCDF_MASK GENMASK(31, 24) |
| #define DFSDM_ICR_CLRSCDF(v) FIELD_PREP(DFSDM_ICR_CLRSCDF_MASK, v) |
| #define DFSDM_ICR_CLRSCDF_CH_MASK(y) BIT(24 + (y)) |
| #define DFSDM_ICR_CLRSCDF_CH(v, y) \ |
| (((v) << (24 + (y))) & DFSDM_ICR_CLRSCDF_MASK(y)) |
| |
| /* FCR: Filter control register */ |
| #define DFSDM_FCR_IOSR_MASK GENMASK(7, 0) |
| #define DFSDM_FCR_IOSR(v) FIELD_PREP(DFSDM_FCR_IOSR_MASK, v) |
| #define DFSDM_FCR_FOSR_MASK GENMASK(25, 16) |
| #define DFSDM_FCR_FOSR(v) FIELD_PREP(DFSDM_FCR_FOSR_MASK, v) |
| #define DFSDM_FCR_FORD_MASK GENMASK(31, 29) |
| #define DFSDM_FCR_FORD(v) FIELD_PREP(DFSDM_FCR_FORD_MASK, v) |
| |
| /* RDATAR: Filter data register for regular channel */ |
| #define DFSDM_DATAR_CH_MASK GENMASK(2, 0) |
| #define DFSDM_DATAR_DATA_OFFSET 8 |
| #define DFSDM_DATAR_DATA_MASK GENMASK(31, DFSDM_DATAR_DATA_OFFSET) |
| |
| /* AWLTR: Filter analog watchdog low threshold register */ |
| #define DFSDM_AWLTR_BKAWL_MASK GENMASK(3, 0) |
| #define DFSDM_AWLTR_BKAWL(v) FIELD_PREP(DFSDM_AWLTR_BKAWL_MASK, v) |
| #define DFSDM_AWLTR_AWLT_MASK GENMASK(31, 8) |
| #define DFSDM_AWLTR_AWLT(v) FIELD_PREP(DFSDM_AWLTR_AWLT_MASK, v) |
| |
| /* AWHTR: Filter analog watchdog low threshold register */ |
| #define DFSDM_AWHTR_BKAWH_MASK GENMASK(3, 0) |
| #define DFSDM_AWHTR_BKAWH(v) FIELD_PREP(DFSDM_AWHTR_BKAWH_MASK, v) |
| #define DFSDM_AWHTR_AWHT_MASK GENMASK(31, 8) |
| #define DFSDM_AWHTR_AWHT(v) FIELD_PREP(DFSDM_AWHTR_AWHT_MASK, v) |
| |
| /* AWSR: Filter watchdog status register */ |
| #define DFSDM_AWSR_AWLTF_MASK GENMASK(7, 0) |
| #define DFSDM_AWSR_AWLTF(v) FIELD_PREP(DFSDM_AWSR_AWLTF_MASK, v) |
| #define DFSDM_AWSR_AWHTF_MASK GENMASK(15, 8) |
| #define DFSDM_AWSR_AWHTF(v) FIELD_PREP(DFSDM_AWSR_AWHTF_MASK, v) |
| |
| /* AWCFR: Filter watchdog status register */ |
| #define DFSDM_AWCFR_AWLTF_MASK GENMASK(7, 0) |
| #define DFSDM_AWCFR_AWLTF(v) FIELD_PREP(DFSDM_AWCFR_AWLTF_MASK, v) |
| #define DFSDM_AWCFR_AWHTF_MASK GENMASK(15, 8) |
| #define DFSDM_AWCFR_AWHTF(v) FIELD_PREP(DFSDM_AWCFR_AWHTF_MASK, v) |
| |
| /* DFSDM filter order */ |
| enum stm32_dfsdm_sinc_order { |
| DFSDM_FASTSINC_ORDER, /* FastSinc filter type */ |
| DFSDM_SINC1_ORDER, /* Sinc 1 filter type */ |
| DFSDM_SINC2_ORDER, /* Sinc 2 filter type */ |
| DFSDM_SINC3_ORDER, /* Sinc 3 filter type */ |
| DFSDM_SINC4_ORDER, /* Sinc 4 filter type (N.A. for watchdog) */ |
| DFSDM_SINC5_ORDER, /* Sinc 5 filter type (N.A. for watchdog) */ |
| DFSDM_NB_SINC_ORDER, |
| }; |
| |
| /** |
| * struct stm32_dfsdm_filter_osr - DFSDM filter settings linked to oversampling |
| * @iosr: integrator oversampling |
| * @fosr: filter oversampling |
| * @rshift: output sample right shift (hardware shift) |
| * @lshift: output sample left shift (software shift) |
| * @res: output sample resolution |
| * @bits: output sample resolution in bits |
| * @max: output sample maximum positive value |
| */ |
| struct stm32_dfsdm_filter_osr { |
| unsigned int iosr; |
| unsigned int fosr; |
| unsigned int rshift; |
| unsigned int lshift; |
| u64 res; |
| u32 bits; |
| s32 max; |
| }; |
| |
| /** |
| * struct stm32_dfsdm_filter - structure relative to stm32 FDSDM filter |
| * @ford: filter order |
| * @flo: filter oversampling data table indexed by fast mode flag |
| * @sync_mode: filter synchronized with filter 0 |
| * @fast: filter fast mode |
| */ |
| struct stm32_dfsdm_filter { |
| enum stm32_dfsdm_sinc_order ford; |
| struct stm32_dfsdm_filter_osr flo[2]; |
| unsigned int sync_mode; |
| unsigned int fast; |
| }; |
| |
| /** |
| * struct stm32_dfsdm_channel - structure relative to stm32 FDSDM channel |
| * @id: id of the channel |
| * @type: interface type linked to stm32_dfsdm_chan_type |
| * @src: interface type linked to stm32_dfsdm_chan_src |
| * @alt_si: alternative serial input interface |
| */ |
| struct stm32_dfsdm_channel { |
| unsigned int id; |
| unsigned int type; |
| unsigned int src; |
| unsigned int alt_si; |
| }; |
| |
| /** |
| * struct stm32_dfsdm - stm32 FDSDM driver common data (for all instances) |
| * @base: control registers base cpu addr |
| * @phys_base: DFSDM IP register physical address |
| * @regmap: regmap for register read/write |
| * @fl_list: filter resources list |
| * @num_fls: number of filter resources available |
| * @ch_list: channel resources list |
| * @num_chs: number of channel resources available |
| * @spi_master_freq: SPI clock out frequency |
| */ |
| struct stm32_dfsdm { |
| void __iomem *base; |
| phys_addr_t phys_base; |
| struct regmap *regmap; |
| struct stm32_dfsdm_filter *fl_list; |
| unsigned int num_fls; |
| struct stm32_dfsdm_channel *ch_list; |
| unsigned int num_chs; |
| unsigned int spi_master_freq; |
| }; |
| |
| /* DFSDM channel serial spi clock source */ |
| enum stm32_dfsdm_spi_clk_src { |
| DFSDM_CHANNEL_SPI_CLOCK_EXTERNAL, |
| DFSDM_CHANNEL_SPI_CLOCK_INTERNAL, |
| DFSDM_CHANNEL_SPI_CLOCK_INTERNAL_DIV2_FALLING, |
| DFSDM_CHANNEL_SPI_CLOCK_INTERNAL_DIV2_RISING |
| }; |
| |
| int stm32_dfsdm_start_dfsdm(struct stm32_dfsdm *dfsdm); |
| int stm32_dfsdm_stop_dfsdm(struct stm32_dfsdm *dfsdm); |
| |
| #endif |
