Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 2 | /* |
| 3 | * Qualcomm GPIO driver |
| 4 | * |
| 5 | * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com> |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 6 | */ |
| 7 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 8 | #include <dm.h> |
| 9 | #include <errno.h> |
Simon Glass | 3ba929a | 2020-10-30 21:38:53 -0600 | [diff] [blame] | 10 | #include <asm/global_data.h> |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 11 | #include <asm/gpio.h> |
| 12 | #include <asm/io.h> |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 13 | #include <mach/gpio.h> |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 14 | |
| 15 | DECLARE_GLOBAL_DATA_PTR; |
| 16 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 17 | /* OE */ |
| 18 | #define GPIO_OE_DISABLE (0x0 << 9) |
| 19 | #define GPIO_OE_ENABLE (0x1 << 9) |
| 20 | #define GPIO_OE_MASK (0x1 << 9) |
| 21 | |
| 22 | /* GPIO_IN_OUT register shifts. */ |
| 23 | #define GPIO_IN 0 |
| 24 | #define GPIO_OUT 1 |
| 25 | |
| 26 | struct msm_gpio_bank { |
| 27 | phys_addr_t base; |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 28 | const struct msm_pin_data *pin_data; |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 29 | }; |
| 30 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 31 | #define GPIO_CONFIG_REG(dev, x) \ |
| 32 | (qcom_pin_offset(((struct msm_gpio_bank *)dev_get_priv(dev))->pin_data->pin_offsets, x)) |
| 33 | |
| 34 | #define GPIO_IN_OUT_REG(dev, x) \ |
| 35 | (GPIO_CONFIG_REG(dev, x) + 0x4) |
| 36 | |
Caleb Connolly | 241dfda | 2024-04-03 14:07:43 +0200 | [diff] [blame] | 37 | static void msm_gpio_direction_input(struct udevice *dev, unsigned int gpio) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 38 | { |
| 39 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 40 | |
Caleb Connolly | 190005c | 2024-02-26 17:26:17 +0000 | [diff] [blame] | 41 | /* Always NOP for special pins, assume they're in the correct state */ |
| 42 | if (qcom_is_special_pin(priv->pin_data, gpio)) |
Caleb Connolly | 241dfda | 2024-04-03 14:07:43 +0200 | [diff] [blame] | 43 | return; |
Caleb Connolly | 190005c | 2024-02-26 17:26:17 +0000 | [diff] [blame] | 44 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 45 | /* Disable OE bit */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 46 | clrsetbits_le32(priv->base + GPIO_CONFIG_REG(dev, gpio), |
| 47 | GPIO_OE_MASK, GPIO_OE_DISABLE); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 48 | |
Caleb Connolly | 241dfda | 2024-04-03 14:07:43 +0200 | [diff] [blame] | 49 | return; |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 50 | } |
| 51 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 52 | static int msm_gpio_set_value(struct udevice *dev, unsigned int gpio, int value) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 53 | { |
| 54 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 55 | |
Caleb Connolly | 190005c | 2024-02-26 17:26:17 +0000 | [diff] [blame] | 56 | /* Always NOP for special pins, assume they're in the correct state */ |
| 57 | if (qcom_is_special_pin(priv->pin_data, gpio)) |
| 58 | return 0; |
| 59 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 60 | value = !!value; |
| 61 | /* set value */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 62 | writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_REG(dev, gpio)); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 63 | |
| 64 | return 0; |
| 65 | } |
| 66 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 67 | static int msm_gpio_direction_output(struct udevice *dev, unsigned int gpio, |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 68 | int value) |
| 69 | { |
| 70 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 71 | |
Caleb Connolly | 190005c | 2024-02-26 17:26:17 +0000 | [diff] [blame] | 72 | /* Always NOP for special pins, assume they're in the correct state */ |
| 73 | if (qcom_is_special_pin(priv->pin_data, gpio)) |
| 74 | return 0; |
| 75 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 76 | value = !!value; |
| 77 | /* set value */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 78 | writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_REG(dev, gpio)); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 79 | /* switch direction */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 80 | clrsetbits_le32(priv->base + GPIO_CONFIG_REG(dev, gpio), |
| 81 | GPIO_OE_MASK, GPIO_OE_ENABLE); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |
Caleb Connolly | 241dfda | 2024-04-03 14:07:43 +0200 | [diff] [blame] | 86 | static int msm_gpio_set_flags(struct udevice *dev, unsigned int gpio, ulong flags) |
| 87 | { |
| 88 | if (flags & GPIOD_IS_OUT_ACTIVE) { |
| 89 | return msm_gpio_direction_output(dev, gpio, 1); |
| 90 | } else if (flags & GPIOD_IS_OUT) { |
| 91 | return msm_gpio_direction_output(dev, gpio, 0); |
| 92 | } else if (flags & GPIOD_IS_IN) { |
| 93 | msm_gpio_direction_input(dev, gpio); |
| 94 | if (flags & GPIOD_PULL_UP) |
| 95 | return msm_gpio_set_value(dev, gpio, 1); |
| 96 | else if (flags & GPIOD_PULL_DOWN) |
| 97 | return msm_gpio_set_value(dev, gpio, 0); |
| 98 | } |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 103 | static int msm_gpio_get_value(struct udevice *dev, unsigned int gpio) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 104 | { |
| 105 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 106 | |
Caleb Connolly | 190005c | 2024-02-26 17:26:17 +0000 | [diff] [blame] | 107 | /* Always NOP for special pins, assume they're in the correct state */ |
| 108 | if (qcom_is_special_pin(priv->pin_data, gpio)) |
| 109 | return 0; |
| 110 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 111 | return !!(readl(priv->base + GPIO_IN_OUT_REG(dev, gpio)) >> GPIO_IN); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 112 | } |
| 113 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 114 | static int msm_gpio_get_function(struct udevice *dev, unsigned int gpio) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 115 | { |
| 116 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 117 | |
Caleb Connolly | 190005c | 2024-02-26 17:26:17 +0000 | [diff] [blame] | 118 | /* Always NOP for special pins, assume they're in the correct state */ |
| 119 | if (qcom_is_special_pin(priv->pin_data, gpio)) |
| 120 | return 0; |
| 121 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 122 | if (readl(priv->base + GPIO_CONFIG_REG(dev, gpio)) & GPIO_OE_ENABLE) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 123 | return GPIOF_OUTPUT; |
| 124 | |
| 125 | return GPIOF_INPUT; |
| 126 | } |
| 127 | |
| 128 | static const struct dm_gpio_ops gpio_msm_ops = { |
Caleb Connolly | 241dfda | 2024-04-03 14:07:43 +0200 | [diff] [blame] | 129 | .set_flags = msm_gpio_set_flags, |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 130 | .get_value = msm_gpio_get_value, |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 131 | .get_function = msm_gpio_get_function, |
| 132 | }; |
| 133 | |
| 134 | static int msm_gpio_probe(struct udevice *dev) |
| 135 | { |
| 136 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 137 | |
Masahiro Yamada | a89b4de | 2020-07-17 14:36:48 +0900 | [diff] [blame] | 138 | priv->base = dev_read_addr(dev); |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 139 | priv->pin_data = (struct msm_pin_data *)dev_get_driver_data(dev); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 140 | |
| 141 | return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0; |
| 142 | } |
| 143 | |
Simon Glass | aad29ae | 2020-12-03 16:55:21 -0700 | [diff] [blame] | 144 | static int msm_gpio_of_to_plat(struct udevice *dev) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 145 | { |
| 146 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 147 | const struct msm_pin_data *pin_data = (struct msm_pin_data *)dev_get_driver_data(dev); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 148 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 149 | /* Get the pin count from the pinctrl driver */ |
| 150 | uc_priv->gpio_count = pin_data->pin_count; |
Simon Glass | dd79d6e | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 151 | uc_priv->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 152 | "gpio-bank-name", NULL); |
| 153 | if (uc_priv->bank_name == NULL) |
| 154 | uc_priv->bank_name = "soc"; |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 159 | U_BOOT_DRIVER(gpio_msm) = { |
| 160 | .name = "gpio_msm", |
| 161 | .id = UCLASS_GPIO, |
Simon Glass | aad29ae | 2020-12-03 16:55:21 -0700 | [diff] [blame] | 162 | .of_to_plat = msm_gpio_of_to_plat, |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 163 | .probe = msm_gpio_probe, |
| 164 | .ops = &gpio_msm_ops, |
Sumit Garg | b7572e5 | 2022-07-27 13:52:04 +0530 | [diff] [blame] | 165 | .flags = DM_UC_FLAG_SEQ_ALIAS, |
Simon Glass | 8a2b47f | 2020-12-03 16:55:17 -0700 | [diff] [blame] | 166 | .priv_auto = sizeof(struct msm_gpio_bank), |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 167 | }; |