developer | 912c7d2 | 2021-03-31 14:53:43 +0800 | [diff] [blame] | 1 | /* |
developer | fe14b9f | 2022-09-05 11:18:04 +0800 | [diff] [blame] | 2 | * Copyright (c) 2020-2022, MediaTek Inc. All rights reserved. |
developer | 912c7d2 | 2021-03-31 14:53:43 +0800 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <assert.h> |
| 8 | #include <common/debug.h> |
| 9 | #include <drivers/delay_timer.h> |
| 10 | #include <drivers/gpio.h> |
| 11 | #include <lib/mmio.h> |
Jianguo Zhang | be99c73 | 2022-07-29 13:55:03 +0800 | [diff] [blame] | 12 | #include <lib/mtk_init/mtk_init.h> |
developer | 912c7d2 | 2021-03-31 14:53:43 +0800 | [diff] [blame] | 13 | #include <mtgpio.h> |
| 14 | #include <platform_def.h> |
| 15 | |
| 16 | /****************************************************************************** |
| 17 | *Macro Definition |
| 18 | ******************************************************************************/ |
| 19 | #define GPIO_MODE_BITS 4 |
| 20 | #define MAX_GPIO_MODE_PER_REG 8 |
| 21 | #define MAX_GPIO_REG_BITS 32 |
| 22 | #define DIR_BASE (GPIO_BASE + 0x000) |
| 23 | #define DOUT_BASE (GPIO_BASE + 0x100) |
| 24 | #define DIN_BASE (GPIO_BASE + 0x200) |
| 25 | #define MODE_BASE (GPIO_BASE + 0x300) |
| 26 | #define SET 0x4 |
| 27 | #define CLR 0x8 |
| 28 | |
| 29 | static void mt_set_gpio_dir_chip(uint32_t pin, int dir) |
| 30 | { |
| 31 | uint32_t pos, bit; |
| 32 | |
| 33 | assert(pin < MAX_GPIO_PIN); |
| 34 | assert(dir < MT_GPIO_DIR_MAX); |
| 35 | |
| 36 | pos = pin / MAX_GPIO_REG_BITS; |
| 37 | bit = pin % MAX_GPIO_REG_BITS; |
| 38 | |
| 39 | if (dir == MT_GPIO_DIR_IN) { |
| 40 | mmio_write_32(DIR_BASE + 0x10U * pos + CLR, 1U << bit); |
| 41 | } else { |
| 42 | mmio_write_32(DIR_BASE + 0x10U * pos + SET, 1U << bit); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | static int mt_get_gpio_dir_chip(uint32_t pin) |
| 47 | { |
| 48 | uint32_t pos, bit; |
| 49 | uint32_t reg; |
| 50 | |
| 51 | assert(pin < MAX_GPIO_PIN); |
| 52 | |
| 53 | pos = pin / MAX_GPIO_REG_BITS; |
| 54 | bit = pin % MAX_GPIO_REG_BITS; |
| 55 | |
| 56 | reg = mmio_read_32(DIR_BASE + 0x10U * pos); |
| 57 | return (((reg & (1U << bit)) != 0U) ? MT_GPIO_DIR_OUT : MT_GPIO_DIR_IN); |
| 58 | } |
| 59 | |
| 60 | static void mt_set_gpio_out_chip(uint32_t pin, int output) |
| 61 | { |
| 62 | uint32_t pos, bit; |
| 63 | |
| 64 | assert(pin < MAX_GPIO_PIN); |
| 65 | assert(output < MT_GPIO_OUT_MAX); |
| 66 | |
| 67 | pos = pin / MAX_GPIO_REG_BITS; |
| 68 | bit = pin % MAX_GPIO_REG_BITS; |
| 69 | |
| 70 | if (output == MT_GPIO_OUT_ZERO) { |
| 71 | mmio_write_32(DOUT_BASE + 0x10U * pos + CLR, 1U << bit); |
| 72 | } else { |
| 73 | mmio_write_32(DOUT_BASE + 0x10U * pos + SET, 1U << bit); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | static int mt_get_gpio_in_chip(uint32_t pin) |
| 78 | { |
| 79 | uint32_t pos, bit; |
| 80 | uint32_t reg; |
| 81 | |
| 82 | assert(pin < MAX_GPIO_PIN); |
| 83 | |
| 84 | pos = pin / MAX_GPIO_REG_BITS; |
| 85 | bit = pin % MAX_GPIO_REG_BITS; |
| 86 | |
| 87 | reg = mmio_read_32(DIN_BASE + 0x10U * pos); |
| 88 | return (((reg & (1U << bit)) != 0U) ? 1 : 0); |
| 89 | } |
| 90 | |
| 91 | static void mt_gpio_set_spec_pull_pupd(uint32_t pin, int enable, |
| 92 | int select) |
| 93 | { |
| 94 | uintptr_t reg1; |
| 95 | uintptr_t reg2; |
| 96 | struct mt_pin_info gpio_info; |
| 97 | |
| 98 | gpio_info = mt_pin_infos[pin]; |
| 99 | uint32_t bit = gpio_info.bit; |
| 100 | |
| 101 | reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; |
| 102 | reg2 = reg1 + (gpio_info.base & 0xf0); |
| 103 | if (enable == MT_GPIO_PULL_ENABLE) { |
| 104 | mmio_write_32(reg2 + SET, (1U << bit)); |
| 105 | if (select == MT_GPIO_PULL_DOWN) { |
| 106 | mmio_write_32(reg1 + SET, (1U << bit)); |
| 107 | } else { |
| 108 | mmio_write_32(reg1 + CLR, (1U << bit)); |
| 109 | } |
| 110 | } else { |
| 111 | mmio_write_32(reg2 + CLR, (1U << bit)); |
| 112 | mmio_write_32((reg2 + 0x010U) + CLR, (1U << bit)); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | static void mt_gpio_set_pull_pu_pd(uint32_t pin, int enable, |
| 117 | int select) |
| 118 | { |
| 119 | uintptr_t reg1; |
| 120 | uintptr_t reg2; |
| 121 | struct mt_pin_info gpio_info; |
| 122 | |
| 123 | gpio_info = mt_pin_infos[pin]; |
| 124 | uint32_t bit = gpio_info.bit; |
| 125 | |
| 126 | reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; |
| 127 | reg2 = reg1 - (gpio_info.base & 0xf0); |
| 128 | |
| 129 | if (enable == MT_GPIO_PULL_ENABLE) { |
| 130 | if (select == MT_GPIO_PULL_DOWN) { |
| 131 | mmio_write_32(reg1 + CLR, (1U << bit)); |
| 132 | mmio_write_32(reg2 + SET, (1U << bit)); |
| 133 | } else { |
| 134 | mmio_write_32(reg2 + CLR, (1U << bit)); |
| 135 | mmio_write_32(reg1 + SET, (1U << bit)); |
| 136 | } |
| 137 | } else { |
| 138 | mmio_write_32(reg1 + CLR, (1U << bit)); |
| 139 | mmio_write_32(reg2 + CLR, (1U << bit)); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | static void mt_gpio_set_pull_chip(uint32_t pin, int enable, |
| 144 | int select) |
| 145 | { |
| 146 | struct mt_pin_info gpio_info; |
| 147 | |
| 148 | gpio_info = mt_pin_infos[pin]; |
| 149 | if (gpio_info.flag) { |
| 150 | mt_gpio_set_spec_pull_pupd(pin, enable, select); |
| 151 | } else { |
| 152 | mt_gpio_set_pull_pu_pd(pin, enable, select); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | static int mt_gpio_get_spec_pull_pupd(uint32_t pin) |
| 157 | { |
| 158 | uintptr_t reg1; |
| 159 | uintptr_t reg2; |
| 160 | uint32_t r0; |
| 161 | uint32_t r1; |
| 162 | |
| 163 | struct mt_pin_info gpio_info; |
| 164 | |
| 165 | gpio_info = mt_pin_infos[pin]; |
| 166 | uint32_t bit = gpio_info.bit; |
| 167 | |
| 168 | reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; |
| 169 | reg2 = reg1 + (gpio_info.base & 0xf0); |
| 170 | |
| 171 | r0 = (mmio_read_32(reg2) >> bit) & 1U; |
| 172 | r1 = (mmio_read_32(reg2 + 0x010) >> bit) & 1U; |
| 173 | if (r0 == 0U && r1 == 0U) { |
| 174 | return MT_GPIO_PULL_NONE; |
| 175 | } else { |
| 176 | if (mmio_read_32(reg1) & (1U << bit)) { |
| 177 | return MT_GPIO_PULL_DOWN; |
| 178 | } else { |
| 179 | return MT_GPIO_PULL_UP; |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | static int mt_gpio_get_pull_pu_pd(uint32_t pin) |
| 185 | { |
| 186 | uintptr_t reg1; |
| 187 | uintptr_t reg2; |
| 188 | uint32_t pu; |
| 189 | uint32_t pd; |
| 190 | |
| 191 | struct mt_pin_info gpio_info; |
| 192 | |
| 193 | gpio_info = mt_pin_infos[pin]; |
| 194 | uint32_t bit = gpio_info.bit; |
| 195 | |
| 196 | reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; |
| 197 | reg2 = reg1 - (gpio_info.base & 0xf0); |
| 198 | pu = (mmio_read_32(reg1) >> bit) & 1U; |
| 199 | pd = (mmio_read_32(reg2) >> bit) & 1U; |
| 200 | if (pu == 1U) { |
| 201 | return MT_GPIO_PULL_UP; |
| 202 | } else if (pd == 1U) { |
| 203 | return MT_GPIO_PULL_DOWN; |
| 204 | } else { |
| 205 | return MT_GPIO_PULL_NONE; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | static int mt_gpio_get_pull_chip(uint32_t pin) |
| 210 | { |
| 211 | struct mt_pin_info gpio_info; |
| 212 | |
| 213 | gpio_info = mt_pin_infos[pin]; |
| 214 | if (gpio_info.flag) { |
| 215 | return mt_gpio_get_spec_pull_pupd(pin); |
| 216 | } else { |
| 217 | return mt_gpio_get_pull_pu_pd(pin); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | static void mt_set_gpio_pull_select_chip(uint32_t pin, int sel) |
| 222 | { |
| 223 | assert(pin < MAX_GPIO_PIN); |
| 224 | |
| 225 | if (sel == MT_GPIO_PULL_NONE) { |
| 226 | mt_gpio_set_pull_chip(pin, MT_GPIO_PULL_DISABLE, MT_GPIO_PULL_DOWN); |
| 227 | } else if (sel == MT_GPIO_PULL_UP) { |
| 228 | mt_gpio_set_pull_chip(pin, MT_GPIO_PULL_ENABLE, MT_GPIO_PULL_UP); |
| 229 | } else if (sel == MT_GPIO_PULL_DOWN) { |
| 230 | mt_gpio_set_pull_chip(pin, MT_GPIO_PULL_ENABLE, MT_GPIO_PULL_DOWN); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /* get pull-up or pull-down, regardless of resistor value */ |
| 235 | static int mt_get_gpio_pull_select_chip(uint32_t pin) |
| 236 | { |
| 237 | assert(pin < MAX_GPIO_PIN); |
| 238 | |
| 239 | return mt_gpio_get_pull_chip(pin); |
| 240 | } |
| 241 | |
| 242 | static void mt_set_gpio_dir(int gpio, int direction) |
| 243 | { |
| 244 | mt_set_gpio_dir_chip((uint32_t)gpio, direction); |
| 245 | } |
| 246 | |
| 247 | static int mt_get_gpio_dir(int gpio) |
| 248 | { |
| 249 | uint32_t pin; |
| 250 | |
| 251 | pin = (uint32_t)gpio; |
| 252 | return mt_get_gpio_dir_chip(pin); |
| 253 | } |
| 254 | |
| 255 | static void mt_set_gpio_pull(int gpio, int pull) |
| 256 | { |
| 257 | uint32_t pin; |
| 258 | |
| 259 | pin = (uint32_t)gpio; |
| 260 | mt_set_gpio_pull_select_chip(pin, pull); |
| 261 | } |
| 262 | |
| 263 | static int mt_get_gpio_pull(int gpio) |
| 264 | { |
| 265 | uint32_t pin; |
| 266 | |
| 267 | pin = (uint32_t)gpio; |
| 268 | return mt_get_gpio_pull_select_chip(pin); |
| 269 | } |
| 270 | |
| 271 | static void mt_set_gpio_out(int gpio, int value) |
| 272 | { |
| 273 | uint32_t pin; |
| 274 | |
| 275 | pin = (uint32_t)gpio; |
| 276 | mt_set_gpio_out_chip(pin, value); |
| 277 | } |
| 278 | |
| 279 | static int mt_get_gpio_in(int gpio) |
| 280 | { |
| 281 | uint32_t pin; |
| 282 | |
| 283 | pin = (uint32_t)gpio; |
| 284 | return mt_get_gpio_in_chip(pin); |
| 285 | } |
| 286 | |
| 287 | const gpio_ops_t mtgpio_ops = { |
| 288 | .get_direction = mt_get_gpio_dir, |
| 289 | .set_direction = mt_set_gpio_dir, |
| 290 | .get_value = mt_get_gpio_in, |
| 291 | .set_value = mt_set_gpio_out, |
| 292 | .set_pull = mt_set_gpio_pull, |
| 293 | .get_pull = mt_get_gpio_pull, |
| 294 | }; |
| 295 | |
Jianguo Zhang | be99c73 | 2022-07-29 13:55:03 +0800 | [diff] [blame] | 296 | int mt_gpio_init(void) |
developer | 912c7d2 | 2021-03-31 14:53:43 +0800 | [diff] [blame] | 297 | { |
| 298 | gpio_init(&mtgpio_ops); |
Jianguo Zhang | be99c73 | 2022-07-29 13:55:03 +0800 | [diff] [blame] | 299 | |
| 300 | return 0; |
developer | 912c7d2 | 2021-03-31 14:53:43 +0800 | [diff] [blame] | 301 | } |
Jianguo Zhang | be99c73 | 2022-07-29 13:55:03 +0800 | [diff] [blame] | 302 | MTK_PLAT_SETUP_0_INIT(mt_gpio_init); |