Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2009 Samsung Electronics |
| 3 | * Minkyu Kang <mk7.kang@samsung.com> |
| 4 | * |
Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 5 | * SPDX-License-Identifier: GPL-2.0+ |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <asm/io.h> |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 10 | #include <asm/gpio.h> |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 11 | |
| 12 | #define CON_MASK(x) (0xf << ((x) << 2)) |
| 13 | #define CON_SFR(x, v) ((v) << ((x) << 2)) |
| 14 | |
| 15 | #define DAT_MASK(x) (0x1 << (x)) |
| 16 | #define DAT_SET(x) (0x1 << (x)) |
| 17 | |
| 18 | #define PULL_MASK(x) (0x3 << ((x) << 1)) |
| 19 | #define PULL_MODE(x, v) ((v) << ((x) << 1)) |
| 20 | |
| 21 | #define DRV_MASK(x) (0x3 << ((x) << 1)) |
| 22 | #define DRV_SET(x, m) ((m) << ((x) << 1)) |
| 23 | #define RATE_MASK(x) (0x1 << (x + 16)) |
| 24 | #define RATE_SET(x) (0x1 << (x + 16)) |
| 25 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 26 | void s5p_gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 27 | { |
| 28 | unsigned int value; |
| 29 | |
| 30 | value = readl(&bank->con); |
| 31 | value &= ~CON_MASK(gpio); |
| 32 | value |= CON_SFR(gpio, cfg); |
| 33 | writel(value, &bank->con); |
| 34 | } |
| 35 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 36 | void s5p_gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 37 | { |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 38 | s5p_gpio_cfg_pin(bank, gpio, GPIO_OUTPUT); |
Axel Lin | 70125f3 | 2013-06-15 22:19:45 +0800 | [diff] [blame] | 39 | s5p_gpio_set_value(bank, gpio, en); |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 40 | } |
| 41 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 42 | void s5p_gpio_direction_input(struct s5p_gpio_bank *bank, int gpio) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 43 | { |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 44 | s5p_gpio_cfg_pin(bank, gpio, GPIO_INPUT); |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 45 | } |
| 46 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 47 | void s5p_gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 48 | { |
| 49 | unsigned int value; |
| 50 | |
| 51 | value = readl(&bank->dat); |
| 52 | value &= ~DAT_MASK(gpio); |
| 53 | if (en) |
| 54 | value |= DAT_SET(gpio); |
| 55 | writel(value, &bank->dat); |
| 56 | } |
| 57 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 58 | unsigned int s5p_gpio_get_value(struct s5p_gpio_bank *bank, int gpio) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 59 | { |
| 60 | unsigned int value; |
| 61 | |
| 62 | value = readl(&bank->dat); |
| 63 | return !!(value & DAT_MASK(gpio)); |
| 64 | } |
| 65 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 66 | void s5p_gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 67 | { |
| 68 | unsigned int value; |
| 69 | |
| 70 | value = readl(&bank->pull); |
| 71 | value &= ~PULL_MASK(gpio); |
| 72 | |
| 73 | switch (mode) { |
| 74 | case GPIO_PULL_DOWN: |
| 75 | case GPIO_PULL_UP: |
| 76 | value |= PULL_MODE(gpio, mode); |
| 77 | break; |
| 78 | default: |
Minkyu Kang | ffb4b02 | 2010-05-28 12:34:29 +0900 | [diff] [blame] | 79 | break; |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | writel(value, &bank->pull); |
| 83 | } |
| 84 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 85 | void s5p_gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 86 | { |
| 87 | unsigned int value; |
| 88 | |
| 89 | value = readl(&bank->drv); |
| 90 | value &= ~DRV_MASK(gpio); |
| 91 | |
| 92 | switch (mode) { |
| 93 | case GPIO_DRV_1X: |
| 94 | case GPIO_DRV_2X: |
| 95 | case GPIO_DRV_3X: |
| 96 | case GPIO_DRV_4X: |
| 97 | value |= DRV_SET(gpio, mode); |
| 98 | break; |
| 99 | default: |
| 100 | return; |
| 101 | } |
| 102 | |
| 103 | writel(value, &bank->drv); |
| 104 | } |
| 105 | |
Łukasz Majewski | ef5d9eb | 2011-07-15 00:16:22 +0000 | [diff] [blame] | 106 | void s5p_gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode) |
Minkyu Kang | ab693e9 | 2010-02-12 18:17:52 +0900 | [diff] [blame] | 107 | { |
| 108 | unsigned int value; |
| 109 | |
| 110 | value = readl(&bank->drv); |
| 111 | value &= ~RATE_MASK(gpio); |
| 112 | |
| 113 | switch (mode) { |
| 114 | case GPIO_DRV_FAST: |
| 115 | case GPIO_DRV_SLOW: |
| 116 | value |= RATE_SET(gpio); |
| 117 | break; |
| 118 | default: |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | writel(value, &bank->drv); |
| 123 | } |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 124 | |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 125 | struct s5p_gpio_bank *s5p_gpio_get_bank(unsigned gpio) |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 126 | { |
Łukasz Majewski | 822593f | 2012-09-04 21:47:46 +0000 | [diff] [blame] | 127 | int bank; |
| 128 | unsigned g = gpio - s5p_gpio_part_max(gpio); |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 129 | |
Łukasz Majewski | 822593f | 2012-09-04 21:47:46 +0000 | [diff] [blame] | 130 | bank = g / GPIO_PER_BANK; |
| 131 | bank *= sizeof(struct s5p_gpio_bank); |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 132 | return (struct s5p_gpio_bank *) (s5p_gpio_base(gpio) + bank); |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 133 | } |
| 134 | |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 135 | int s5p_gpio_get_pin(unsigned gpio) |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 136 | { |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 137 | return gpio % GPIO_PER_BANK; |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 138 | } |
| 139 | |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 140 | /* Common GPIO API */ |
| 141 | |
| 142 | int gpio_request(unsigned gpio, const char *label) |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 143 | { |
| 144 | return 0; |
| 145 | } |
| 146 | |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 147 | int gpio_free(unsigned gpio) |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 148 | { |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 149 | return 0; |
| 150 | } |
| 151 | |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 152 | int gpio_direction_input(unsigned gpio) |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 153 | { |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 154 | s5p_gpio_direction_input(s5p_gpio_get_bank(gpio), |
| 155 | s5p_gpio_get_pin(gpio)); |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 156 | return 0; |
| 157 | } |
| 158 | |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 159 | int gpio_direction_output(unsigned gpio, int value) |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 160 | { |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 161 | s5p_gpio_direction_output(s5p_gpio_get_bank(gpio), |
| 162 | s5p_gpio_get_pin(gpio), value); |
| 163 | return 0; |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 164 | } |
| 165 | |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 166 | int gpio_get_value(unsigned gpio) |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 167 | { |
Joe Hershberger | 365d607 | 2011-11-11 15:55:36 -0600 | [diff] [blame] | 168 | return (int) s5p_gpio_get_value(s5p_gpio_get_bank(gpio), |
| 169 | s5p_gpio_get_pin(gpio)); |
| 170 | } |
| 171 | |
| 172 | int gpio_set_value(unsigned gpio, int value) |
| 173 | { |
| 174 | s5p_gpio_set_value(s5p_gpio_get_bank(gpio), |
| 175 | s5p_gpio_get_pin(gpio), value); |
| 176 | |
| 177 | return 0; |
Łukasz Majewski | 9f15bc0 | 2011-08-22 22:34:58 +0000 | [diff] [blame] | 178 | } |