Henrik Nordstrom | aa382ad | 2014-06-13 22:55:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2012 |
| 3 | * Henrik Nordstrom <henrik@henriknordstrom.net> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <i2c.h> |
| 10 | #include <axp209.h> |
| 11 | |
| 12 | enum axp209_reg { |
| 13 | AXP209_POWER_STATUS = 0x00, |
| 14 | AXP209_CHIP_VERSION = 0x03, |
| 15 | AXP209_DCDC2_VOLTAGE = 0x23, |
| 16 | AXP209_DCDC3_VOLTAGE = 0x27, |
| 17 | AXP209_LDO24_VOLTAGE = 0x28, |
| 18 | AXP209_LDO3_VOLTAGE = 0x29, |
Hans de Goede | c004b9f | 2015-01-17 16:39:20 +0100 | [diff] [blame] | 19 | AXP209_IRQ_ENABLE1 = 0x40, |
| 20 | AXP209_IRQ_ENABLE2 = 0x41, |
| 21 | AXP209_IRQ_ENABLE3 = 0x42, |
| 22 | AXP209_IRQ_ENABLE4 = 0x43, |
| 23 | AXP209_IRQ_ENABLE5 = 0x44, |
Henrik Nordstrom | aa382ad | 2014-06-13 22:55:50 +0200 | [diff] [blame] | 24 | AXP209_IRQ_STATUS5 = 0x4c, |
| 25 | AXP209_SHUTDOWN = 0x32, |
Hans de Goede | 1fc9c4a | 2014-12-24 19:34:38 +0100 | [diff] [blame] | 26 | AXP209_GPIO0_CTRL = 0x90, |
| 27 | AXP209_GPIO1_CTRL = 0x92, |
| 28 | AXP209_GPIO2_CTRL = 0x93, |
| 29 | AXP209_GPIO_STATE = 0x94, |
| 30 | AXP209_GPIO3_CTRL = 0x95, |
Henrik Nordstrom | aa382ad | 2014-06-13 22:55:50 +0200 | [diff] [blame] | 31 | }; |
| 32 | |
| 33 | #define AXP209_POWER_STATUS_ON_BY_DC (1 << 0) |
| 34 | |
| 35 | #define AXP209_IRQ5_PEK_UP (1 << 6) |
| 36 | #define AXP209_IRQ5_PEK_DOWN (1 << 5) |
| 37 | |
| 38 | #define AXP209_POWEROFF (1 << 7) |
| 39 | |
Hans de Goede | 1fc9c4a | 2014-12-24 19:34:38 +0100 | [diff] [blame] | 40 | #define AXP209_GPIO_OUTPUT_LOW 0x00 /* Drive pin low */ |
| 41 | #define AXP209_GPIO_OUTPUT_HIGH 0x01 /* Drive pin high */ |
| 42 | #define AXP209_GPIO_INPUT 0x02 /* Float pin */ |
| 43 | |
| 44 | /* GPIO3 is different from the others */ |
| 45 | #define AXP209_GPIO3_OUTPUT_LOW 0x00 /* Drive pin low, Output mode */ |
| 46 | #define AXP209_GPIO3_OUTPUT_HIGH 0x02 /* Float pin, Output mode */ |
| 47 | #define AXP209_GPIO3_INPUT 0x06 /* Float pin, Input mode */ |
| 48 | |
Henrik Nordstrom | aa382ad | 2014-06-13 22:55:50 +0200 | [diff] [blame] | 49 | static int axp209_write(enum axp209_reg reg, u8 val) |
| 50 | { |
| 51 | return i2c_write(0x34, reg, 1, &val, 1); |
| 52 | } |
| 53 | |
| 54 | static int axp209_read(enum axp209_reg reg, u8 *val) |
| 55 | { |
| 56 | return i2c_read(0x34, reg, 1, val, 1); |
| 57 | } |
| 58 | |
| 59 | static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div) |
| 60 | { |
| 61 | if (mvolt < min) |
| 62 | mvolt = min; |
| 63 | else if (mvolt > max) |
| 64 | mvolt = max; |
| 65 | |
| 66 | return (mvolt - min) / div; |
| 67 | } |
| 68 | |
| 69 | int axp209_set_dcdc2(int mvolt) |
| 70 | { |
| 71 | int rc; |
| 72 | u8 cfg, current; |
| 73 | |
| 74 | cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25); |
| 75 | |
| 76 | /* Do we really need to be this gentle? It has built-in voltage slope */ |
| 77 | while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 && |
| 78 | current != cfg) { |
| 79 | if (current < cfg) |
| 80 | current++; |
| 81 | else |
| 82 | current--; |
| 83 | |
| 84 | rc = axp209_write(AXP209_DCDC2_VOLTAGE, current); |
| 85 | if (rc) |
| 86 | break; |
| 87 | } |
| 88 | |
| 89 | return rc; |
| 90 | } |
| 91 | |
| 92 | int axp209_set_dcdc3(int mvolt) |
| 93 | { |
| 94 | u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25); |
| 95 | |
| 96 | return axp209_write(AXP209_DCDC3_VOLTAGE, cfg); |
| 97 | } |
| 98 | |
| 99 | int axp209_set_ldo2(int mvolt) |
| 100 | { |
| 101 | int rc; |
| 102 | u8 cfg, reg; |
| 103 | |
| 104 | cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100); |
| 105 | |
| 106 | rc = axp209_read(AXP209_LDO24_VOLTAGE, ®); |
| 107 | if (rc) |
| 108 | return rc; |
| 109 | |
| 110 | /* LDO2 configuration is in upper 4 bits */ |
| 111 | reg = (reg & 0x0f) | (cfg << 4); |
| 112 | return axp209_write(AXP209_LDO24_VOLTAGE, reg); |
| 113 | } |
| 114 | |
| 115 | int axp209_set_ldo3(int mvolt) |
| 116 | { |
| 117 | u8 cfg; |
| 118 | |
| 119 | if (mvolt == -1) |
| 120 | cfg = 0x80; /* determined by LDO3IN pin */ |
| 121 | else |
Iain Paton | 71a7b3b | 2015-03-25 16:03:26 +0000 | [diff] [blame] | 122 | cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25); |
Henrik Nordstrom | aa382ad | 2014-06-13 22:55:50 +0200 | [diff] [blame] | 123 | |
| 124 | return axp209_write(AXP209_LDO3_VOLTAGE, cfg); |
| 125 | } |
| 126 | |
| 127 | int axp209_set_ldo4(int mvolt) |
| 128 | { |
| 129 | int rc; |
| 130 | static const int vindex[] = { |
| 131 | 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500, |
| 132 | 2700, 2800, 3000, 3100, 3200, 3300 |
| 133 | }; |
| 134 | u8 cfg, reg; |
| 135 | |
| 136 | /* Translate mvolt to register cfg value, requested <= selected */ |
| 137 | for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--); |
| 138 | |
| 139 | rc = axp209_read(AXP209_LDO24_VOLTAGE, ®); |
| 140 | if (rc) |
| 141 | return rc; |
| 142 | |
| 143 | /* LDO4 configuration is in lower 4 bits */ |
| 144 | reg = (reg & 0xf0) | (cfg << 0); |
| 145 | return axp209_write(AXP209_LDO24_VOLTAGE, reg); |
| 146 | } |
| 147 | |
| 148 | int axp209_init(void) |
| 149 | { |
| 150 | u8 ver; |
Hans de Goede | c004b9f | 2015-01-17 16:39:20 +0100 | [diff] [blame] | 151 | int i, rc; |
Henrik Nordstrom | aa382ad | 2014-06-13 22:55:50 +0200 | [diff] [blame] | 152 | |
| 153 | rc = axp209_read(AXP209_CHIP_VERSION, &ver); |
| 154 | if (rc) |
| 155 | return rc; |
| 156 | |
| 157 | /* Low 4 bits is chip version */ |
| 158 | ver &= 0x0f; |
| 159 | |
| 160 | if (ver != 0x1) |
| 161 | return -1; |
| 162 | |
Hans de Goede | c004b9f | 2015-01-17 16:39:20 +0100 | [diff] [blame] | 163 | /* Mask all interrupts */ |
| 164 | for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) { |
| 165 | rc = axp209_write(i, 0); |
| 166 | if (rc) |
| 167 | return rc; |
| 168 | } |
| 169 | |
Henrik Nordstrom | aa382ad | 2014-06-13 22:55:50 +0200 | [diff] [blame] | 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | int axp209_poweron_by_dc(void) |
| 174 | { |
| 175 | u8 v; |
| 176 | |
| 177 | if (axp209_read(AXP209_POWER_STATUS, &v)) |
| 178 | return 0; |
| 179 | |
| 180 | return (v & AXP209_POWER_STATUS_ON_BY_DC); |
| 181 | } |
| 182 | |
| 183 | int axp209_power_button(void) |
| 184 | { |
| 185 | u8 v; |
| 186 | |
| 187 | if (axp209_read(AXP209_IRQ_STATUS5, &v)) |
| 188 | return 0; |
| 189 | |
| 190 | axp209_write(AXP209_IRQ_STATUS5, AXP209_IRQ5_PEK_DOWN); |
| 191 | |
| 192 | return v & AXP209_IRQ5_PEK_DOWN; |
| 193 | } |
Hans de Goede | 1fc9c4a | 2014-12-24 19:34:38 +0100 | [diff] [blame] | 194 | |
| 195 | static u8 axp209_get_gpio_ctrl_reg(unsigned int pin) |
| 196 | { |
| 197 | switch (pin) { |
| 198 | case 0: return AXP209_GPIO0_CTRL; |
| 199 | case 1: return AXP209_GPIO1_CTRL; |
| 200 | case 2: return AXP209_GPIO2_CTRL; |
| 201 | case 3: return AXP209_GPIO3_CTRL; |
| 202 | } |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | int axp_gpio_direction_input(unsigned int pin) |
| 207 | { |
| 208 | u8 reg = axp209_get_gpio_ctrl_reg(pin); |
| 209 | /* GPIO3 is "special" */ |
| 210 | u8 val = (pin == 3) ? AXP209_GPIO3_INPUT : AXP209_GPIO_INPUT; |
| 211 | |
| 212 | return axp209_write(reg, val); |
| 213 | } |
| 214 | |
| 215 | int axp_gpio_direction_output(unsigned int pin, unsigned int val) |
| 216 | { |
| 217 | u8 reg = axp209_get_gpio_ctrl_reg(pin); |
| 218 | |
| 219 | if (val) { |
| 220 | val = (pin == 3) ? AXP209_GPIO3_OUTPUT_HIGH : |
| 221 | AXP209_GPIO_OUTPUT_HIGH; |
| 222 | } else { |
| 223 | val = (pin == 3) ? AXP209_GPIO3_OUTPUT_LOW : |
| 224 | AXP209_GPIO_OUTPUT_LOW; |
| 225 | } |
| 226 | |
| 227 | return axp209_write(reg, val); |
| 228 | } |
| 229 | |
| 230 | int axp_gpio_get_value(unsigned int pin) |
| 231 | { |
| 232 | u8 val, mask; |
| 233 | int rc; |
| 234 | |
| 235 | if (pin == 3) { |
| 236 | rc = axp209_read(AXP209_GPIO3_CTRL, &val); |
| 237 | mask = 1; |
| 238 | } else { |
| 239 | rc = axp209_read(AXP209_GPIO_STATE, &val); |
| 240 | mask = 1 << (pin + 4); |
| 241 | } |
| 242 | if (rc) |
| 243 | return rc; |
| 244 | |
| 245 | return (val & mask) ? 1 : 0; |
| 246 | } |
| 247 | |
| 248 | int axp_gpio_set_value(unsigned int pin, unsigned int val) |
| 249 | { |
| 250 | return axp_gpio_direction_output(pin, val); |
| 251 | } |