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/* SPDX-License-Identifier: GPL-2.0 */
/*
* This file is part of STM32 ADC driver
*
* Copyright (C) 2016, STMicroelectronics - All Rights Reserved
* Author: Fabrice Gasnier <fabrice.gasnier@st.com>.
*
*/
#ifndef __STM32_ADC_H
#define __STM32_ADC_H
/*
* STM32 - ADC global register map
* ________________________________________________________
* | Offset | Register |
* --------------------------------------------------------
* | 0x000 | Master ADC1 |
* --------------------------------------------------------
* | 0x100 | Slave ADC2 |
* --------------------------------------------------------
* | 0x200 | Slave ADC3 |
* --------------------------------------------------------
* | 0x300 | Master & Slave common regs |
* --------------------------------------------------------
*/
#define STM32_ADC_MAX_ADCS 3
#define STM32_ADC_OFFSET 0x100
#define STM32_ADCX_COMN_OFFSET 0x300
/* STM32F4 - Registers for each ADC instance */
#define STM32F4_ADC_SR 0x00
#define STM32F4_ADC_CR1 0x04
#define STM32F4_ADC_CR2 0x08
#define STM32F4_ADC_SMPR1 0x0C
#define STM32F4_ADC_SMPR2 0x10
#define STM32F4_ADC_HTR 0x24
#define STM32F4_ADC_LTR 0x28
#define STM32F4_ADC_SQR1 0x2C
#define STM32F4_ADC_SQR2 0x30
#define STM32F4_ADC_SQR3 0x34
#define STM32F4_ADC_JSQR 0x38
#define STM32F4_ADC_JDR1 0x3C
#define STM32F4_ADC_JDR2 0x40
#define STM32F4_ADC_JDR3 0x44
#define STM32F4_ADC_JDR4 0x48
#define STM32F4_ADC_DR 0x4C
/* STM32F4 - common registers for all ADC instances: 1, 2 & 3 */
#define STM32F4_ADC_CSR (STM32_ADCX_COMN_OFFSET + 0x00)
#define STM32F4_ADC_CCR (STM32_ADCX_COMN_OFFSET + 0x04)
/* STM32F4_ADC_SR - bit fields */
#define STM32F4_OVR BIT(5)
#define STM32F4_STRT BIT(4)
#define STM32F4_EOC BIT(1)
/* STM32F4_ADC_CR1 - bit fields */
#define STM32F4_OVRIE BIT(26)
#define STM32F4_RES_SHIFT 24
#define STM32F4_RES_MASK GENMASK(25, 24)
#define STM32F4_SCAN BIT(8)
#define STM32F4_EOCIE BIT(5)
/* STM32F4_ADC_CR2 - bit fields */
#define STM32F4_SWSTART BIT(30)
#define STM32F4_EXTEN_SHIFT 28
#define STM32F4_EXTEN_MASK GENMASK(29, 28)
#define STM32F4_EXTSEL_SHIFT 24
#define STM32F4_EXTSEL_MASK GENMASK(27, 24)
#define STM32F4_EOCS BIT(10)
#define STM32F4_DDS BIT(9)
#define STM32F4_DMA BIT(8)
#define STM32F4_ADON BIT(0)
/* STM32F4_ADC_CSR - bit fields */
#define STM32F4_OVR3 BIT(21)
#define STM32F4_EOC3 BIT(17)
#define STM32F4_OVR2 BIT(13)
#define STM32F4_EOC2 BIT(9)
#define STM32F4_OVR1 BIT(5)
#define STM32F4_EOC1 BIT(1)
/* STM32F4_ADC_CCR - bit fields */
#define STM32F4_ADC_ADCPRE_SHIFT 16
#define STM32F4_ADC_ADCPRE_MASK GENMASK(17, 16)
/* STM32H7 - Registers for each ADC instance */
#define STM32H7_ADC_ISR 0x00
#define STM32H7_ADC_IER 0x04
#define STM32H7_ADC_CR 0x08
#define STM32H7_ADC_CFGR 0x0C
#define STM32H7_ADC_SMPR1 0x14
#define STM32H7_ADC_SMPR2 0x18
#define STM32H7_ADC_PCSEL 0x1C
#define STM32H7_ADC_SQR1 0x30
#define STM32H7_ADC_SQR2 0x34
#define STM32H7_ADC_SQR3 0x38
#define STM32H7_ADC_SQR4 0x3C
#define STM32H7_ADC_DR 0x40
#define STM32H7_ADC_DIFSEL 0xC0
#define STM32H7_ADC_CALFACT 0xC4
#define STM32H7_ADC_CALFACT2 0xC8
/* STM32H7 - common registers for all ADC instances */
#define STM32H7_ADC_CSR (STM32_ADCX_COMN_OFFSET + 0x00)
#define STM32H7_ADC_CCR (STM32_ADCX_COMN_OFFSET + 0x08)
/* STM32H7_ADC_ISR - bit fields */
#define STM32MP1_VREGREADY BIT(12)
#define STM32H7_OVR BIT(4)
#define STM32H7_EOC BIT(2)
#define STM32H7_ADRDY BIT(0)
/* STM32H7_ADC_IER - bit fields */
#define STM32H7_OVRIE STM32H7_OVR
#define STM32H7_EOCIE STM32H7_EOC
/* STM32H7_ADC_CR - bit fields */
#define STM32H7_ADCAL BIT(31)
#define STM32H7_ADCALDIF BIT(30)
#define STM32H7_DEEPPWD BIT(29)
#define STM32H7_ADVREGEN BIT(28)
#define STM32H7_LINCALRDYW6 BIT(27)
#define STM32H7_LINCALRDYW5 BIT(26)
#define STM32H7_LINCALRDYW4 BIT(25)
#define STM32H7_LINCALRDYW3 BIT(24)
#define STM32H7_LINCALRDYW2 BIT(23)
#define STM32H7_LINCALRDYW1 BIT(22)
#define STM32H7_ADCALLIN BIT(16)
#define STM32H7_BOOST BIT(8)
#define STM32H7_ADSTP BIT(4)
#define STM32H7_ADSTART BIT(2)
#define STM32H7_ADDIS BIT(1)
#define STM32H7_ADEN BIT(0)
/* STM32H7_ADC_CFGR bit fields */
#define STM32H7_EXTEN_SHIFT 10
#define STM32H7_EXTEN_MASK GENMASK(11, 10)
#define STM32H7_EXTSEL_SHIFT 5
#define STM32H7_EXTSEL_MASK GENMASK(9, 5)
#define STM32H7_RES_SHIFT 2
#define STM32H7_RES_MASK GENMASK(4, 2)
#define STM32H7_DMNGT_SHIFT 0
#define STM32H7_DMNGT_MASK GENMASK(1, 0)
enum stm32h7_adc_dmngt {
STM32H7_DMNGT_DR_ONLY, /* Regular data in DR only */
STM32H7_DMNGT_DMA_ONESHOT, /* DMA one shot mode */
STM32H7_DMNGT_DFSDM, /* DFSDM mode */
STM32H7_DMNGT_DMA_CIRC, /* DMA circular mode */
};
/* STM32H7_ADC_CALFACT - bit fields */
#define STM32H7_CALFACT_D_SHIFT 16
#define STM32H7_CALFACT_D_MASK GENMASK(26, 16)
#define STM32H7_CALFACT_S_SHIFT 0
#define STM32H7_CALFACT_S_MASK GENMASK(10, 0)
/* STM32H7_ADC_CALFACT2 - bit fields */
#define STM32H7_LINCALFACT_SHIFT 0
#define STM32H7_LINCALFACT_MASK GENMASK(29, 0)
/* STM32H7_ADC_CSR - bit fields */
#define STM32H7_OVR_SLV BIT(20)
#define STM32H7_EOC_SLV BIT(18)
#define STM32H7_OVR_MST BIT(4)
#define STM32H7_EOC_MST BIT(2)
/* STM32H7_ADC_CCR - bit fields */
#define STM32H7_PRESC_SHIFT 18
#define STM32H7_PRESC_MASK GENMASK(21, 18)
#define STM32H7_CKMODE_SHIFT 16
#define STM32H7_CKMODE_MASK GENMASK(17, 16)
/**
* struct stm32_adc_common - stm32 ADC driver common data (for all instances)
* @base: control registers base cpu addr
* @phys_base: control registers base physical addr
* @rate: clock rate used for analog circuitry
* @vref_mv: vref voltage (mv)
*/
struct stm32_adc_common {
void __iomem *base;
phys_addr_t phys_base;
unsigned long rate;
int vref_mv;
};
#endif
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