| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * GPIO driver for TI DaVinci DA8xx SOCs. |
| * |
| * (C) Copyright 2011 Guralp Systems Ltd. |
| * Laurence Withers <lwithers@guralp.com> |
| */ |
| |
| #include <common.h> |
| #include <dm.h> |
| #include <fdtdec.h> |
| #include <asm/io.h> |
| #include <asm/gpio.h> |
| #include <dt-bindings/gpio/gpio.h> |
| |
| #include "da8xx_gpio.h" |
| |
| #ifndef CONFIG_DM_GPIO |
| #include <asm/arch/hardware.h> |
| #include <asm/arch/davinci_misc.h> |
| |
| static struct gpio_registry { |
| int is_registered; |
| char name[GPIO_NAME_SIZE]; |
| } gpio_registry[MAX_NUM_GPIOS]; |
| |
| #if defined(CONFIG_SOC_DA8XX) |
| #define pinmux(x) (&davinci_syscfg_regs->pinmux[x]) |
| |
| #if defined(CONFIG_SOC_DA8XX) && !defined(CONFIG_SOC_DA850) |
| static const struct pinmux_config gpio_pinmux[] = { |
| { pinmux(13), 8, 6 }, /* GP0[0] */ |
| { pinmux(13), 8, 7 }, |
| { pinmux(14), 8, 0 }, |
| { pinmux(14), 8, 1 }, |
| { pinmux(14), 8, 2 }, |
| { pinmux(14), 8, 3 }, |
| { pinmux(14), 8, 4 }, |
| { pinmux(14), 8, 5 }, |
| { pinmux(14), 8, 6 }, |
| { pinmux(14), 8, 7 }, |
| { pinmux(15), 8, 0 }, |
| { pinmux(15), 8, 1 }, |
| { pinmux(15), 8, 2 }, |
| { pinmux(15), 8, 3 }, |
| { pinmux(15), 8, 4 }, |
| { pinmux(15), 8, 5 }, |
| { pinmux(15), 8, 6 }, /* GP1[0] */ |
| { pinmux(15), 8, 7 }, |
| { pinmux(16), 8, 0 }, |
| { pinmux(16), 8, 1 }, |
| { pinmux(16), 8, 2 }, |
| { pinmux(16), 8, 3 }, |
| { pinmux(16), 8, 4 }, |
| { pinmux(16), 8, 5 }, |
| { pinmux(16), 8, 6 }, |
| { pinmux(16), 8, 7 }, |
| { pinmux(17), 8, 0 }, |
| { pinmux(17), 8, 1 }, |
| { pinmux(17), 8, 2 }, |
| { pinmux(17), 8, 3 }, |
| { pinmux(17), 8, 4 }, |
| { pinmux(17), 8, 5 }, |
| { pinmux(17), 8, 6 }, /* GP2[0] */ |
| { pinmux(17), 8, 7 }, |
| { pinmux(18), 8, 0 }, |
| { pinmux(18), 8, 1 }, |
| { pinmux(18), 8, 2 }, |
| { pinmux(18), 8, 3 }, |
| { pinmux(18), 8, 4 }, |
| { pinmux(18), 8, 5 }, |
| { pinmux(18), 8, 6 }, |
| { pinmux(18), 8, 7 }, |
| { pinmux(19), 8, 0 }, |
| { pinmux(9), 8, 2 }, |
| { pinmux(9), 8, 3 }, |
| { pinmux(9), 8, 4 }, |
| { pinmux(9), 8, 5 }, |
| { pinmux(9), 8, 6 }, |
| { pinmux(10), 8, 1 }, /* GP3[0] */ |
| { pinmux(10), 8, 2 }, |
| { pinmux(10), 8, 3 }, |
| { pinmux(10), 8, 4 }, |
| { pinmux(10), 8, 5 }, |
| { pinmux(10), 8, 6 }, |
| { pinmux(10), 8, 7 }, |
| { pinmux(11), 8, 0 }, |
| { pinmux(11), 8, 1 }, |
| { pinmux(11), 8, 2 }, |
| { pinmux(11), 8, 3 }, |
| { pinmux(11), 8, 4 }, |
| { pinmux(9), 8, 7 }, |
| { pinmux(2), 8, 6 }, |
| { pinmux(11), 8, 5 }, |
| { pinmux(11), 8, 6 }, |
| { pinmux(12), 8, 4 }, /* GP4[0] */ |
| { pinmux(12), 8, 5 }, |
| { pinmux(12), 8, 6 }, |
| { pinmux(12), 8, 7 }, |
| { pinmux(13), 8, 0 }, |
| { pinmux(13), 8, 1 }, |
| { pinmux(13), 8, 2 }, |
| { pinmux(13), 8, 3 }, |
| { pinmux(13), 8, 4 }, |
| { pinmux(13), 8, 5 }, |
| { pinmux(11), 8, 7 }, |
| { pinmux(12), 8, 0 }, |
| { pinmux(12), 8, 1 }, |
| { pinmux(12), 8, 2 }, |
| { pinmux(12), 8, 3 }, |
| { pinmux(9), 8, 1 }, |
| { pinmux(7), 8, 3 }, /* GP5[0] */ |
| { pinmux(7), 8, 4 }, |
| { pinmux(7), 8, 5 }, |
| { pinmux(7), 8, 6 }, |
| { pinmux(7), 8, 7 }, |
| { pinmux(8), 8, 0 }, |
| { pinmux(8), 8, 1 }, |
| { pinmux(8), 8, 2 }, |
| { pinmux(8), 8, 3 }, |
| { pinmux(8), 8, 4 }, |
| { pinmux(8), 8, 5 }, |
| { pinmux(8), 8, 6 }, |
| { pinmux(8), 8, 7 }, |
| { pinmux(9), 8, 0 }, |
| { pinmux(7), 8, 1 }, |
| { pinmux(7), 8, 2 }, |
| { pinmux(5), 8, 1 }, /* GP6[0] */ |
| { pinmux(5), 8, 2 }, |
| { pinmux(5), 8, 3 }, |
| { pinmux(5), 8, 4 }, |
| { pinmux(5), 8, 5 }, |
| { pinmux(5), 8, 6 }, |
| { pinmux(5), 8, 7 }, |
| { pinmux(6), 8, 0 }, |
| { pinmux(6), 8, 1 }, |
| { pinmux(6), 8, 2 }, |
| { pinmux(6), 8, 3 }, |
| { pinmux(6), 8, 4 }, |
| { pinmux(6), 8, 5 }, |
| { pinmux(6), 8, 6 }, |
| { pinmux(6), 8, 7 }, |
| { pinmux(7), 8, 0 }, |
| { pinmux(1), 8, 0 }, /* GP7[0] */ |
| { pinmux(1), 8, 1 }, |
| { pinmux(1), 8, 2 }, |
| { pinmux(1), 8, 3 }, |
| { pinmux(1), 8, 4 }, |
| { pinmux(1), 8, 5 }, |
| { pinmux(1), 8, 6 }, |
| { pinmux(1), 8, 7 }, |
| { pinmux(2), 8, 0 }, |
| { pinmux(2), 8, 1 }, |
| { pinmux(2), 8, 2 }, |
| { pinmux(2), 8, 3 }, |
| { pinmux(2), 8, 4 }, |
| { pinmux(2), 8, 5 }, |
| { pinmux(0), 1, 0 }, |
| { pinmux(0), 1, 1 }, |
| }; |
| #else /* CONFIG_SOC_DA8XX && CONFIG_SOC_DA850 */ |
| static const struct pinmux_config gpio_pinmux[] = { |
| { pinmux(1), 8, 7 }, /* GP0[0] */ |
| { pinmux(1), 8, 6 }, |
| { pinmux(1), 8, 5 }, |
| { pinmux(1), 8, 4 }, |
| { pinmux(1), 8, 3 }, |
| { pinmux(1), 8, 2 }, |
| { pinmux(1), 8, 1 }, |
| { pinmux(1), 8, 0 }, |
| { pinmux(0), 8, 7 }, |
| { pinmux(0), 8, 6 }, |
| { pinmux(0), 8, 5 }, |
| { pinmux(0), 8, 4 }, |
| { pinmux(0), 8, 3 }, |
| { pinmux(0), 8, 2 }, |
| { pinmux(0), 8, 1 }, |
| { pinmux(0), 8, 0 }, |
| { pinmux(4), 8, 7 }, /* GP1[0] */ |
| { pinmux(4), 8, 6 }, |
| { pinmux(4), 8, 5 }, |
| { pinmux(4), 8, 4 }, |
| { pinmux(4), 8, 3 }, |
| { pinmux(4), 8, 2 }, |
| { pinmux(4), 4, 1 }, |
| { pinmux(4), 4, 0 }, |
| { pinmux(3), 4, 0 }, |
| { pinmux(2), 4, 6 }, |
| { pinmux(2), 4, 5 }, |
| { pinmux(2), 4, 4 }, |
| { pinmux(2), 4, 3 }, |
| { pinmux(2), 4, 2 }, |
| { pinmux(2), 4, 1 }, |
| { pinmux(2), 8, 0 }, |
| { pinmux(6), 8, 7 }, /* GP2[0] */ |
| { pinmux(6), 8, 6 }, |
| { pinmux(6), 8, 5 }, |
| { pinmux(6), 8, 4 }, |
| { pinmux(6), 8, 3 }, |
| { pinmux(6), 8, 2 }, |
| { pinmux(6), 8, 1 }, |
| { pinmux(6), 8, 0 }, |
| { pinmux(5), 8, 7 }, |
| { pinmux(5), 8, 6 }, |
| { pinmux(5), 8, 5 }, |
| { pinmux(5), 8, 4 }, |
| { pinmux(5), 8, 3 }, |
| { pinmux(5), 8, 2 }, |
| { pinmux(5), 8, 1 }, |
| { pinmux(5), 8, 0 }, |
| { pinmux(8), 8, 7 }, /* GP3[0] */ |
| { pinmux(8), 8, 6 }, |
| { pinmux(8), 8, 5 }, |
| { pinmux(8), 8, 4 }, |
| { pinmux(8), 8, 3 }, |
| { pinmux(8), 8, 2 }, |
| { pinmux(8), 8, 1 }, |
| { pinmux(8), 8, 0 }, |
| { pinmux(7), 8, 7 }, |
| { pinmux(7), 8, 6 }, |
| { pinmux(7), 8, 5 }, |
| { pinmux(7), 8, 4 }, |
| { pinmux(7), 8, 3 }, |
| { pinmux(7), 8, 2 }, |
| { pinmux(7), 8, 1 }, |
| { pinmux(7), 8, 0 }, |
| { pinmux(10), 8, 7 }, /* GP4[0] */ |
| { pinmux(10), 8, 6 }, |
| { pinmux(10), 8, 5 }, |
| { pinmux(10), 8, 4 }, |
| { pinmux(10), 8, 3 }, |
| { pinmux(10), 8, 2 }, |
| { pinmux(10), 8, 1 }, |
| { pinmux(10), 8, 0 }, |
| { pinmux(9), 8, 7 }, |
| { pinmux(9), 8, 6 }, |
| { pinmux(9), 8, 5 }, |
| { pinmux(9), 8, 4 }, |
| { pinmux(9), 8, 3 }, |
| { pinmux(9), 8, 2 }, |
| { pinmux(9), 8, 1 }, |
| { pinmux(9), 8, 0 }, |
| { pinmux(12), 8, 7 }, /* GP5[0] */ |
| { pinmux(12), 8, 6 }, |
| { pinmux(12), 8, 5 }, |
| { pinmux(12), 8, 4 }, |
| { pinmux(12), 8, 3 }, |
| { pinmux(12), 8, 2 }, |
| { pinmux(12), 8, 1 }, |
| { pinmux(12), 8, 0 }, |
| { pinmux(11), 8, 7 }, |
| { pinmux(11), 8, 6 }, |
| { pinmux(11), 8, 5 }, |
| { pinmux(11), 8, 4 }, |
| { pinmux(11), 8, 3 }, |
| { pinmux(11), 8, 2 }, |
| { pinmux(11), 8, 1 }, |
| { pinmux(11), 8, 0 }, |
| { pinmux(19), 8, 6 }, /* GP6[0] */ |
| { pinmux(19), 8, 5 }, |
| { pinmux(19), 8, 4 }, |
| { pinmux(19), 8, 3 }, |
| { pinmux(19), 8, 2 }, |
| { pinmux(16), 8, 1 }, |
| { pinmux(14), 8, 1 }, |
| { pinmux(14), 8, 0 }, |
| { pinmux(13), 8, 7 }, |
| { pinmux(13), 8, 6 }, |
| { pinmux(13), 8, 5 }, |
| { pinmux(13), 8, 4 }, |
| { pinmux(13), 8, 3 }, |
| { pinmux(13), 8, 2 }, |
| { pinmux(13), 8, 1 }, |
| { pinmux(13), 8, 0 }, |
| { pinmux(18), 8, 1 }, /* GP7[0] */ |
| { pinmux(18), 8, 0 }, |
| { pinmux(17), 8, 7 }, |
| { pinmux(17), 8, 6 }, |
| { pinmux(17), 8, 5 }, |
| { pinmux(17), 8, 4 }, |
| { pinmux(17), 8, 3 }, |
| { pinmux(17), 8, 2 }, |
| { pinmux(17), 8, 1 }, |
| { pinmux(17), 8, 0 }, |
| { pinmux(16), 8, 7 }, |
| { pinmux(16), 8, 6 }, |
| { pinmux(16), 8, 5 }, |
| { pinmux(16), 8, 4 }, |
| { pinmux(16), 8, 3 }, |
| { pinmux(16), 8, 2 }, |
| { pinmux(19), 8, 0 }, /* GP8[0] */ |
| { pinmux(3), 4, 7 }, |
| { pinmux(3), 4, 6 }, |
| { pinmux(3), 4, 5 }, |
| { pinmux(3), 4, 4 }, |
| { pinmux(3), 4, 3 }, |
| { pinmux(3), 4, 2 }, |
| { pinmux(2), 4, 7 }, |
| { pinmux(19), 8, 1 }, |
| { pinmux(19), 8, 0 }, |
| { pinmux(18), 8, 7 }, |
| { pinmux(18), 8, 6 }, |
| { pinmux(18), 8, 5 }, |
| { pinmux(18), 8, 4 }, |
| { pinmux(18), 8, 3 }, |
| { pinmux(18), 8, 2 }, |
| }; |
| #endif /* CONFIG_SOC_DA8XX && !CONFIG_SOC_DA850 */ |
| #else /* !CONFIG_SOC_DA8XX */ |
| #define davinci_configure_pin_mux(a, b) |
| #endif /* CONFIG_SOC_DA8XX */ |
| |
| int gpio_request(unsigned int gpio, const char *label) |
| { |
| if (gpio >= MAX_NUM_GPIOS) |
| return -1; |
| |
| if (gpio_registry[gpio].is_registered) |
| return -1; |
| |
| gpio_registry[gpio].is_registered = 1; |
| strncpy(gpio_registry[gpio].name, label, GPIO_NAME_SIZE); |
| gpio_registry[gpio].name[GPIO_NAME_SIZE - 1] = 0; |
| |
| davinci_configure_pin_mux(&gpio_pinmux[gpio], 1); |
| |
| return 0; |
| } |
| |
| int gpio_free(unsigned int gpio) |
| { |
| if (gpio >= MAX_NUM_GPIOS) |
| return -1; |
| |
| if (!gpio_registry[gpio].is_registered) |
| return -1; |
| |
| gpio_registry[gpio].is_registered = 0; |
| gpio_registry[gpio].name[0] = '\0'; |
| /* Do not configure as input or change pin mux here */ |
| return 0; |
| } |
| #endif |
| |
| static int _gpio_direction_input(struct davinci_gpio *bank, unsigned int gpio) |
| { |
| setbits_le32(&bank->dir, 1U << GPIO_BIT(gpio)); |
| return 0; |
| } |
| |
| static int _gpio_get_value(struct davinci_gpio *bank, unsigned int gpio) |
| { |
| unsigned int ip; |
| ip = in_le32(&bank->in_data) & (1U << GPIO_BIT(gpio)); |
| return ip ? 1 : 0; |
| } |
| |
| static int _gpio_set_value(struct davinci_gpio *bank, unsigned int gpio, int value) |
| { |
| if (value) |
| bank->set_data = 1U << GPIO_BIT(gpio); |
| else |
| bank->clr_data = 1U << GPIO_BIT(gpio); |
| |
| return 0; |
| } |
| |
| static int _gpio_get_dir(struct davinci_gpio *bank, unsigned int gpio) |
| { |
| return in_le32(&bank->dir) & (1U << GPIO_BIT(gpio)); |
| } |
| |
| static int _gpio_direction_output(struct davinci_gpio *bank, unsigned int gpio, |
| int value) |
| { |
| clrbits_le32(&bank->dir, 1U << GPIO_BIT(gpio)); |
| _gpio_set_value(bank, gpio, value); |
| return 0; |
| } |
| #ifndef CONFIG_DM_GPIO |
| |
| void gpio_info(void) |
| { |
| unsigned int gpio, dir, val; |
| struct davinci_gpio *bank; |
| |
| for (gpio = 0; gpio < MAX_NUM_GPIOS; ++gpio) { |
| bank = GPIO_BANK(gpio); |
| dir = _gpio_get_dir(bank, gpio); |
| val = gpio_get_value(gpio); |
| |
| printf("% 4d: %s: %d [%c] %s\n", |
| gpio, dir ? " in" : "out", val, |
| gpio_registry[gpio].is_registered ? 'x' : ' ', |
| gpio_registry[gpio].name); |
| } |
| } |
| |
| int gpio_direction_input(unsigned int gpio) |
| { |
| struct davinci_gpio *bank; |
| |
| bank = GPIO_BANK(gpio); |
| return _gpio_direction_input(bank, gpio); |
| } |
| |
| int gpio_direction_output(unsigned int gpio, int value) |
| { |
| struct davinci_gpio *bank; |
| |
| bank = GPIO_BANK(gpio); |
| return _gpio_direction_output(bank, gpio, value); |
| } |
| |
| int gpio_get_value(unsigned int gpio) |
| { |
| struct davinci_gpio *bank; |
| |
| bank = GPIO_BANK(gpio); |
| return _gpio_get_value(bank, gpio); |
| } |
| |
| int gpio_set_value(unsigned int gpio, int value) |
| { |
| struct davinci_gpio *bank; |
| |
| bank = GPIO_BANK(gpio); |
| return _gpio_set_value(bank, gpio, value); |
| } |
| |
| #else /* CONFIG_DM_GPIO */ |
| |
| static struct davinci_gpio *davinci_get_gpio_bank(struct udevice *dev, unsigned int offset) |
| { |
| struct davinci_gpio_bank *bank = dev_get_priv(dev); |
| unsigned int addr; |
| |
| /* |
| * The device tree is not broken into banks but the infrastructure is |
| * expecting it this way, so we'll first include the 0x10 offset, then |
| * calculate the bank manually based on the offset. |
| * Casting 'addr' as Unsigned long is needed to make the math work. |
| */ |
| addr = ((unsigned long)(struct davinci_gpio *)bank->base) + |
| 0x10 + (0x28 * (offset >> 5)); |
| return (struct davinci_gpio *)addr; |
| } |
| |
| static int davinci_gpio_direction_input(struct udevice *dev, unsigned int offset) |
| { |
| struct davinci_gpio *base = davinci_get_gpio_bank(dev, offset); |
| |
| /* |
| * Fetch the address based on GPIO, but only pass the masked low 32-bits |
| */ |
| _gpio_direction_input(base, (offset & 0x1f)); |
| return 0; |
| } |
| |
| static int davinci_gpio_direction_output(struct udevice *dev, unsigned int offset, |
| int value) |
| { |
| struct davinci_gpio *base = davinci_get_gpio_bank(dev, offset); |
| |
| _gpio_direction_output(base, (offset & 0x1f), value); |
| return 0; |
| } |
| |
| static int davinci_gpio_get_value(struct udevice *dev, unsigned int offset) |
| { |
| struct davinci_gpio *base = davinci_get_gpio_bank(dev, offset); |
| |
| return _gpio_get_value(base, (offset & 0x1f)); |
| } |
| |
| static int davinci_gpio_set_value(struct udevice *dev, unsigned int offset, |
| int value) |
| { |
| struct davinci_gpio *base = davinci_get_gpio_bank(dev, offset); |
| |
| _gpio_set_value(base, (offset & 0x1f), value); |
| |
| return 0; |
| } |
| |
| static int davinci_gpio_get_function(struct udevice *dev, unsigned int offset) |
| { |
| unsigned int dir; |
| struct davinci_gpio *base = davinci_get_gpio_bank(dev, offset); |
| |
| dir = _gpio_get_dir(base, offset); |
| |
| if (dir) |
| return GPIOF_INPUT; |
| |
| return GPIOF_OUTPUT; |
| } |
| |
| static int davinci_gpio_xlate(struct udevice *dev, struct gpio_desc *desc, |
| struct ofnode_phandle_args *args) |
| { |
| desc->offset = args->args[0]; |
| |
| if (args->args[1] & GPIO_ACTIVE_LOW) |
| desc->flags = GPIOD_ACTIVE_LOW; |
| else |
| desc->flags = 0; |
| return 0; |
| } |
| |
| static const struct dm_gpio_ops gpio_davinci_ops = { |
| .direction_input = davinci_gpio_direction_input, |
| .direction_output = davinci_gpio_direction_output, |
| .get_value = davinci_gpio_get_value, |
| .set_value = davinci_gpio_set_value, |
| .get_function = davinci_gpio_get_function, |
| .xlate = davinci_gpio_xlate, |
| }; |
| |
| static int davinci_gpio_probe(struct udevice *dev) |
| { |
| struct davinci_gpio_bank *bank = dev_get_priv(dev); |
| struct davinci_gpio_platdata *plat = dev_get_platdata(dev); |
| struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
| const void *fdt = gd->fdt_blob; |
| int node = dev_of_offset(dev); |
| |
| uc_priv->bank_name = plat->port_name; |
| uc_priv->gpio_count = fdtdec_get_int(fdt, node, "ti,ngpio", -1); |
| bank->base = (struct davinci_gpio *)plat->base; |
| return 0; |
| } |
| |
| static const struct udevice_id davinci_gpio_ids[] = { |
| { .compatible = "ti,dm6441-gpio" }, |
| { .compatible = "ti,k2g-gpio" }, |
| { } |
| }; |
| |
| static int davinci_gpio_ofdata_to_platdata(struct udevice *dev) |
| { |
| struct davinci_gpio_platdata *plat = dev_get_platdata(dev); |
| fdt_addr_t addr; |
| |
| addr = devfdt_get_addr(dev); |
| if (addr == FDT_ADDR_T_NONE) |
| return -EINVAL; |
| |
| plat->base = addr; |
| return 0; |
| } |
| |
| U_BOOT_DRIVER(gpio_davinci) = { |
| .name = "gpio_davinci", |
| .id = UCLASS_GPIO, |
| .ops = &gpio_davinci_ops, |
| .ofdata_to_platdata = of_match_ptr(davinci_gpio_ofdata_to_platdata), |
| .of_match = davinci_gpio_ids, |
| .bind = dm_scan_fdt_dev, |
| .platdata_auto_alloc_size = sizeof(struct davinci_gpio_platdata), |
| .probe = davinci_gpio_probe, |
| .priv_auto_alloc_size = sizeof(struct davinci_gpio_bank), |
| }; |
| |
| #endif |