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 | |
| 8 | #include <common.h> |
| 9 | #include <dm.h> |
| 10 | #include <errno.h> |
Simon Glass | 3ba929a | 2020-10-30 21:38:53 -0600 | [diff] [blame] | 11 | #include <asm/global_data.h> |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 12 | #include <asm/gpio.h> |
| 13 | #include <asm/io.h> |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 14 | #include <mach/gpio.h> |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 15 | |
| 16 | DECLARE_GLOBAL_DATA_PTR; |
| 17 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 18 | /* OE */ |
| 19 | #define GPIO_OE_DISABLE (0x0 << 9) |
| 20 | #define GPIO_OE_ENABLE (0x1 << 9) |
| 21 | #define GPIO_OE_MASK (0x1 << 9) |
| 22 | |
| 23 | /* GPIO_IN_OUT register shifts. */ |
| 24 | #define GPIO_IN 0 |
| 25 | #define GPIO_OUT 1 |
| 26 | |
| 27 | struct msm_gpio_bank { |
| 28 | phys_addr_t base; |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 29 | const struct msm_pin_data *pin_data; |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 30 | }; |
| 31 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 32 | #define GPIO_CONFIG_REG(dev, x) \ |
| 33 | (qcom_pin_offset(((struct msm_gpio_bank *)dev_get_priv(dev))->pin_data->pin_offsets, x)) |
| 34 | |
| 35 | #define GPIO_IN_OUT_REG(dev, x) \ |
| 36 | (GPIO_CONFIG_REG(dev, x) + 0x4) |
| 37 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 38 | static int msm_gpio_direction_input(struct udevice *dev, unsigned int gpio) |
| 39 | { |
| 40 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 41 | |
| 42 | /* Disable OE bit */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 43 | clrsetbits_le32(priv->base + GPIO_CONFIG_REG(dev, gpio), |
| 44 | GPIO_OE_MASK, GPIO_OE_DISABLE); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 45 | |
| 46 | return 0; |
| 47 | } |
| 48 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 49 | 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] | 50 | { |
| 51 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 52 | |
| 53 | value = !!value; |
| 54 | /* set value */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 55 | writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_REG(dev, gpio)); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 60 | static int msm_gpio_direction_output(struct udevice *dev, unsigned int gpio, |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 61 | int value) |
| 62 | { |
| 63 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 64 | |
| 65 | value = !!value; |
| 66 | /* set value */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 67 | writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_REG(dev, gpio)); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 68 | /* switch direction */ |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 69 | clrsetbits_le32(priv->base + GPIO_CONFIG_REG(dev, gpio), |
| 70 | GPIO_OE_MASK, GPIO_OE_ENABLE); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 75 | static int msm_gpio_get_value(struct udevice *dev, unsigned int gpio) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 76 | { |
| 77 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 78 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 79 | return !!(readl(priv->base + GPIO_IN_OUT_REG(dev, gpio)) >> GPIO_IN); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 80 | } |
| 81 | |
Caleb Connolly | 8fff7eb | 2023-11-14 12:55:43 +0000 | [diff] [blame] | 82 | static int msm_gpio_get_function(struct udevice *dev, unsigned int gpio) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 83 | { |
| 84 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 85 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 86 | if (readl(priv->base + GPIO_CONFIG_REG(dev, gpio)) & GPIO_OE_ENABLE) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 87 | return GPIOF_OUTPUT; |
| 88 | |
| 89 | return GPIOF_INPUT; |
| 90 | } |
| 91 | |
| 92 | static const struct dm_gpio_ops gpio_msm_ops = { |
| 93 | .direction_input = msm_gpio_direction_input, |
| 94 | .direction_output = msm_gpio_direction_output, |
| 95 | .get_value = msm_gpio_get_value, |
| 96 | .set_value = msm_gpio_set_value, |
| 97 | .get_function = msm_gpio_get_function, |
| 98 | }; |
| 99 | |
| 100 | static int msm_gpio_probe(struct udevice *dev) |
| 101 | { |
| 102 | struct msm_gpio_bank *priv = dev_get_priv(dev); |
| 103 | |
Masahiro Yamada | a89b4de | 2020-07-17 14:36:48 +0900 | [diff] [blame] | 104 | priv->base = dev_read_addr(dev); |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 105 | priv->pin_data = (struct msm_pin_data *)dev_get_driver_data(dev); |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 106 | |
| 107 | return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0; |
| 108 | } |
| 109 | |
Simon Glass | aad29ae | 2020-12-03 16:55:21 -0700 | [diff] [blame] | 110 | static int msm_gpio_of_to_plat(struct udevice *dev) |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 111 | { |
| 112 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 113 | 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] | 114 | |
Caleb Connolly | fabb897 | 2023-11-14 12:55:42 +0000 | [diff] [blame] | 115 | /* Get the pin count from the pinctrl driver */ |
| 116 | uc_priv->gpio_count = pin_data->pin_count; |
Simon Glass | dd79d6e | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 117 | 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] | 118 | "gpio-bank-name", NULL); |
| 119 | if (uc_priv->bank_name == NULL) |
| 120 | uc_priv->bank_name = "soc"; |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 125 | U_BOOT_DRIVER(gpio_msm) = { |
| 126 | .name = "gpio_msm", |
| 127 | .id = UCLASS_GPIO, |
Simon Glass | aad29ae | 2020-12-03 16:55:21 -0700 | [diff] [blame] | 128 | .of_to_plat = msm_gpio_of_to_plat, |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 129 | .probe = msm_gpio_probe, |
| 130 | .ops = &gpio_msm_ops, |
Sumit Garg | b7572e5 | 2022-07-27 13:52:04 +0530 | [diff] [blame] | 131 | .flags = DM_UC_FLAG_SEQ_ALIAS, |
Simon Glass | 8a2b47f | 2020-12-03 16:55:17 -0700 | [diff] [blame] | 132 | .priv_auto = sizeof(struct msm_gpio_bank), |
Mateusz Kulikowski | a1b3ae9 | 2016-03-31 23:12:15 +0200 | [diff] [blame] | 133 | }; |