1 /* SPDX-License-Identifier: GPL-2.0 */
3 * This file is part of STM32 ADC driver
5 * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
6 * Author: Fabrice Gasnier <fabrice.gasnier@st.com>.
14 * STM32 - ADC global register map
15 * ________________________________________________________
16 * | Offset | Register |
17 * --------------------------------------------------------
18 * | 0x000 | Master ADC1 |
19 * --------------------------------------------------------
20 * | 0x100 | Slave ADC2 |
21 * --------------------------------------------------------
22 * | 0x200 | Slave ADC3 |
23 * --------------------------------------------------------
24 * | 0x300 | Master & Slave common regs |
25 * --------------------------------------------------------
27 #define STM32_ADC_MAX_ADCS 3
28 #define STM32_ADC_OFFSET 0x100
29 #define STM32_ADCX_COMN_OFFSET 0x300
31 /* STM32F4 - Registers for each ADC instance */
32 #define STM32F4_ADC_SR 0x00
33 #define STM32F4_ADC_CR1 0x04
34 #define STM32F4_ADC_CR2 0x08
35 #define STM32F4_ADC_SMPR1 0x0C
36 #define STM32F4_ADC_SMPR2 0x10
37 #define STM32F4_ADC_HTR 0x24
38 #define STM32F4_ADC_LTR 0x28
39 #define STM32F4_ADC_SQR1 0x2C
40 #define STM32F4_ADC_SQR2 0x30
41 #define STM32F4_ADC_SQR3 0x34
42 #define STM32F4_ADC_JSQR 0x38
43 #define STM32F4_ADC_JDR1 0x3C
44 #define STM32F4_ADC_JDR2 0x40
45 #define STM32F4_ADC_JDR3 0x44
46 #define STM32F4_ADC_JDR4 0x48
47 #define STM32F4_ADC_DR 0x4C
49 /* STM32F4 - common registers for all ADC instances: 1, 2 & 3 */
50 #define STM32F4_ADC_CSR (STM32_ADCX_COMN_OFFSET + 0x00)
51 #define STM32F4_ADC_CCR (STM32_ADCX_COMN_OFFSET + 0x04)
53 /* STM32F4_ADC_SR - bit fields */
54 #define STM32F4_STRT BIT(4)
55 #define STM32F4_EOC BIT(1)
57 /* STM32F4_ADC_CR1 - bit fields */
58 #define STM32F4_RES_SHIFT 24
59 #define STM32F4_RES_MASK GENMASK(25, 24)
60 #define STM32F4_SCAN BIT(8)
61 #define STM32F4_EOCIE BIT(5)
63 /* STM32F4_ADC_CR2 - bit fields */
64 #define STM32F4_SWSTART BIT(30)
65 #define STM32F4_EXTEN_SHIFT 28
66 #define STM32F4_EXTEN_MASK GENMASK(29, 28)
67 #define STM32F4_EXTSEL_SHIFT 24
68 #define STM32F4_EXTSEL_MASK GENMASK(27, 24)
69 #define STM32F4_EOCS BIT(10)
70 #define STM32F4_DDS BIT(9)
71 #define STM32F4_DMA BIT(8)
72 #define STM32F4_ADON BIT(0)
74 /* STM32F4_ADC_CSR - bit fields */
75 #define STM32F4_EOC3 BIT(17)
76 #define STM32F4_EOC2 BIT(9)
77 #define STM32F4_EOC1 BIT(1)
79 /* STM32F4_ADC_CCR - bit fields */
80 #define STM32F4_ADC_ADCPRE_SHIFT 16
81 #define STM32F4_ADC_ADCPRE_MASK GENMASK(17, 16)
83 /* STM32H7 - Registers for each ADC instance */
84 #define STM32H7_ADC_ISR 0x00
85 #define STM32H7_ADC_IER 0x04
86 #define STM32H7_ADC_CR 0x08
87 #define STM32H7_ADC_CFGR 0x0C
88 #define STM32H7_ADC_SMPR1 0x14
89 #define STM32H7_ADC_SMPR2 0x18
90 #define STM32H7_ADC_PCSEL 0x1C
91 #define STM32H7_ADC_SQR1 0x30
92 #define STM32H7_ADC_SQR2 0x34
93 #define STM32H7_ADC_SQR3 0x38
94 #define STM32H7_ADC_SQR4 0x3C
95 #define STM32H7_ADC_DR 0x40
96 #define STM32H7_ADC_DIFSEL 0xC0
97 #define STM32H7_ADC_CALFACT 0xC4
98 #define STM32H7_ADC_CALFACT2 0xC8
100 /* STM32H7 - common registers for all ADC instances */
101 #define STM32H7_ADC_CSR (STM32_ADCX_COMN_OFFSET + 0x00)
102 #define STM32H7_ADC_CCR (STM32_ADCX_COMN_OFFSET + 0x08)
104 /* STM32H7_ADC_ISR - bit fields */
105 #define STM32MP1_VREGREADY BIT(12)
106 #define STM32H7_EOC BIT(2)
107 #define STM32H7_ADRDY BIT(0)
109 /* STM32H7_ADC_IER - bit fields */
110 #define STM32H7_EOCIE STM32H7_EOC
112 /* STM32H7_ADC_CR - bit fields */
113 #define STM32H7_ADCAL BIT(31)
114 #define STM32H7_ADCALDIF BIT(30)
115 #define STM32H7_DEEPPWD BIT(29)
116 #define STM32H7_ADVREGEN BIT(28)
117 #define STM32H7_LINCALRDYW6 BIT(27)
118 #define STM32H7_LINCALRDYW5 BIT(26)
119 #define STM32H7_LINCALRDYW4 BIT(25)
120 #define STM32H7_LINCALRDYW3 BIT(24)
121 #define STM32H7_LINCALRDYW2 BIT(23)
122 #define STM32H7_LINCALRDYW1 BIT(22)
123 #define STM32H7_ADCALLIN BIT(16)
124 #define STM32H7_BOOST BIT(8)
125 #define STM32H7_ADSTP BIT(4)
126 #define STM32H7_ADSTART BIT(2)
127 #define STM32H7_ADDIS BIT(1)
128 #define STM32H7_ADEN BIT(0)
130 /* STM32H7_ADC_CFGR bit fields */
131 #define STM32H7_EXTEN_SHIFT 10
132 #define STM32H7_EXTEN_MASK GENMASK(11, 10)
133 #define STM32H7_EXTSEL_SHIFT 5
134 #define STM32H7_EXTSEL_MASK GENMASK(9, 5)
135 #define STM32H7_RES_SHIFT 2
136 #define STM32H7_RES_MASK GENMASK(4, 2)
137 #define STM32H7_DMNGT_SHIFT 0
138 #define STM32H7_DMNGT_MASK GENMASK(1, 0)
140 enum stm32h7_adc_dmngt {
141 STM32H7_DMNGT_DR_ONLY, /* Regular data in DR only */
142 STM32H7_DMNGT_DMA_ONESHOT, /* DMA one shot mode */
143 STM32H7_DMNGT_DFSDM, /* DFSDM mode */
144 STM32H7_DMNGT_DMA_CIRC, /* DMA circular mode */
147 /* STM32H7_ADC_CALFACT - bit fields */
148 #define STM32H7_CALFACT_D_SHIFT 16
149 #define STM32H7_CALFACT_D_MASK GENMASK(26, 16)
150 #define STM32H7_CALFACT_S_SHIFT 0
151 #define STM32H7_CALFACT_S_MASK GENMASK(10, 0)
153 /* STM32H7_ADC_CALFACT2 - bit fields */
154 #define STM32H7_LINCALFACT_SHIFT 0
155 #define STM32H7_LINCALFACT_MASK GENMASK(29, 0)
157 /* STM32H7_ADC_CSR - bit fields */
158 #define STM32H7_EOC_SLV BIT(18)
159 #define STM32H7_EOC_MST BIT(2)
161 /* STM32H7_ADC_CCR - bit fields */
162 #define STM32H7_PRESC_SHIFT 18
163 #define STM32H7_PRESC_MASK GENMASK(21, 18)
164 #define STM32H7_CKMODE_SHIFT 16
165 #define STM32H7_CKMODE_MASK GENMASK(17, 16)
168 * struct stm32_adc_common - stm32 ADC driver common data (for all instances)
169 * @base: control registers base cpu addr
170 * @phys_base: control registers base physical addr
171 * @rate: clock rate used for analog circuitry
172 * @vref_mv: vref voltage (mv)
174 struct stm32_adc_common {
176 phys_addr_t phys_base;