| Christophe Leroy | 0ee1ff8 | 2024-04-12 12:01:25 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * (C) Copyright 2024 CS GROUP France |
| 4 | * Christophe Leroy <christophe.leroy@csgroup.eu> |
| 5 | */ |
| 6 | |
| 7 | #include <asm/io.h> |
| 8 | #include <dm.h> |
| 9 | #include <mapmem.h> |
| 10 | #include <asm/gpio.h> |
| 11 | #include <malloc.h> |
| 12 | |
| 13 | #include "../common/common.h" |
| 14 | |
| 15 | struct mcr3000_spi_gpio_plat { |
| 16 | ulong addr; |
| 17 | }; |
| 18 | |
| 19 | struct mcr3000_spi_gpio_data { |
| 20 | void __iomem *base; |
| 21 | }; |
| 22 | |
| 23 | static int mcr3000_spi_gpio_set_value(struct udevice *dev, uint gpio, int value) |
| 24 | { |
| 25 | struct mcr3000_spi_gpio_data *data = dev_get_priv(dev); |
| 26 | |
| 27 | if (value) |
| 28 | clrsetbits_be16(data->base, 7 << 5, (gpio & 7) << 5); |
| 29 | else |
| 30 | clrbits_be16(data->base, 7 << 5); |
| 31 | |
| 32 | return 0; |
| 33 | } |
| 34 | |
| 35 | static int mcr3000_spi_gpio_get_value(struct udevice *dev, uint gpio) |
| 36 | { |
| 37 | struct mcr3000_spi_gpio_data *data = dev_get_priv(dev); |
| 38 | |
| 39 | return gpio == ((in_be16(data->base) >> 5) & 7); |
| 40 | } |
| 41 | |
| 42 | static int mcr3000_spi_gpio_direction_input(struct udevice *dev, uint gpio) |
| 43 | { |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | static int mcr3000_spi_gpio_get_function(struct udevice *dev, uint gpio) |
| 48 | { |
| 49 | return GPIOF_OUTPUT; |
| 50 | } |
| 51 | |
| 52 | static int mcr3000_spi_gpio_ofdata_to_platdata(struct udevice *dev) |
| 53 | { |
| 54 | struct mcr3000_spi_gpio_plat *plat = dev_get_plat(dev); |
| 55 | fdt_addr_t addr; |
| 56 | u32 reg[2]; |
| 57 | |
| 58 | dev_read_u32_array(dev, "reg", reg, 2); |
| 59 | addr = dev_translate_address(dev, reg); |
| 60 | |
| 61 | plat->addr = addr; |
| 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | static int mcr3000_spi_gpio_probe(struct udevice *dev) |
| 67 | { |
| 68 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
| 69 | struct mcr3000_spi_gpio_data *data = dev_get_priv(dev); |
| 70 | struct mcr3000_spi_gpio_plat *plat = dev_get_plat(dev); |
| 71 | char name[32], *str; |
| 72 | |
| 73 | data->base = map_sysmem(plat->addr, 2); |
| 74 | |
| 75 | snprintf(name, sizeof(name), "CHIPSELECT@%lx_", plat->addr); |
| 76 | str = strdup(name); |
| 77 | |
| 78 | if (!str) |
| 79 | return -ENOMEM; |
| 80 | |
| 81 | uc_priv->bank_name = str; |
| 82 | uc_priv->gpio_count = 16; |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static const struct dm_gpio_ops gpio_mcr3000_spi_ops = { |
| 88 | .get_value = mcr3000_spi_gpio_get_value, |
| 89 | .set_value = mcr3000_spi_gpio_set_value, |
| 90 | .direction_input = mcr3000_spi_gpio_direction_input, |
| 91 | .direction_output = mcr3000_spi_gpio_set_value, |
| 92 | .get_function = mcr3000_spi_gpio_get_function, |
| 93 | }; |
| 94 | |
| 95 | static const struct udevice_id mcr3000_spi_gpio_ids[] = { |
| 96 | { .compatible = "s3k,mcr3000-cpld-csspi"}, |
| 97 | { /* sentinel */ } |
| 98 | }; |
| 99 | |
| 100 | U_BOOT_DRIVER(mcr3000_spi_gpio) = { |
| 101 | .name = "mcr3000_spi_chipselect", |
| 102 | .id = UCLASS_GPIO, |
| 103 | .ops = &gpio_mcr3000_spi_ops, |
| 104 | .of_to_plat = mcr3000_spi_gpio_ofdata_to_platdata, |
| 105 | .plat_auto = sizeof(struct mcr3000_spi_gpio_plat), |
| 106 | .of_match = mcr3000_spi_gpio_ids, |
| 107 | .probe = mcr3000_spi_gpio_probe, |
| 108 | .priv_auto = sizeof(struct mcr3000_spi_gpio_data), |
| 109 | }; |