| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2015 Google, Inc |
| * |
| * (C) Copyright 2008-2014 Rockchip Electronics |
| * Peter, Software Engineering, <superpeter.cai@gmail.com>. |
| */ |
| |
| #include <common.h> |
| #include <dm.h> |
| #include <syscon.h> |
| #include <linux/errno.h> |
| #include <asm/gpio.h> |
| #include <asm/arch-rockchip/clock.h> |
| #include <asm/arch-rockchip/hardware.h> |
| #include <asm/arch-rockchip/gpio.h> |
| #include <dm/pinctrl.h> |
| #include <dm/read.h> |
| #include <dt-bindings/pinctrl/rockchip.h> |
| |
| #define SWPORT_DR 0x0000 |
| #define SWPORT_DDR 0x0004 |
| #define EXT_PORT 0x0050 |
| #define SWPORT_DR_L 0x0000 |
| #define SWPORT_DR_H 0x0004 |
| #define SWPORT_DDR_L 0x0008 |
| #define SWPORT_DDR_H 0x000C |
| #define EXT_PORT_V2 0x0070 |
| #define VER_ID_V2 0x0078 |
| |
| enum { |
| ROCKCHIP_GPIOS_PER_BANK = 32, |
| }; |
| |
| struct rockchip_gpio_priv { |
| void __iomem *regs; |
| struct udevice *pinctrl; |
| int bank; |
| char name[2]; |
| u32 version; |
| }; |
| |
| static int rockchip_gpio_get_value(struct udevice *dev, unsigned offset) |
| { |
| struct rockchip_gpio_priv *priv = dev_get_priv(dev); |
| u32 mask = BIT(offset), data; |
| |
| if (priv->version) |
| data = readl(priv->regs + EXT_PORT_V2); |
| else |
| data = readl(priv->regs + EXT_PORT); |
| |
| return (data & mask) ? 1 : 0; |
| } |
| |
| static int rockchip_gpio_set_value(struct udevice *dev, unsigned offset, |
| int value) |
| { |
| struct rockchip_gpio_priv *priv = dev_get_priv(dev); |
| u32 mask = BIT(offset), data = value ? mask : 0; |
| |
| if (priv->version && offset >= 16) |
| rk_clrsetreg(priv->regs + SWPORT_DR_H, mask >> 16, data >> 16); |
| else if (priv->version) |
| rk_clrsetreg(priv->regs + SWPORT_DR_L, mask, data); |
| else |
| clrsetbits_le32(priv->regs + SWPORT_DR, mask, data); |
| |
| return 0; |
| } |
| |
| static int rockchip_gpio_direction_input(struct udevice *dev, unsigned offset) |
| { |
| struct rockchip_gpio_priv *priv = dev_get_priv(dev); |
| u32 mask = BIT(offset); |
| |
| if (priv->version && offset >= 16) |
| rk_clrreg(priv->regs + SWPORT_DDR_H, mask >> 16); |
| else if (priv->version) |
| rk_clrreg(priv->regs + SWPORT_DDR_L, mask); |
| else |
| clrbits_le32(priv->regs + SWPORT_DDR, mask); |
| |
| return 0; |
| } |
| |
| static int rockchip_gpio_direction_output(struct udevice *dev, unsigned offset, |
| int value) |
| { |
| struct rockchip_gpio_priv *priv = dev_get_priv(dev); |
| u32 mask = BIT(offset); |
| |
| rockchip_gpio_set_value(dev, offset, value); |
| |
| if (priv->version && offset >= 16) |
| rk_setreg(priv->regs + SWPORT_DDR_H, mask >> 16); |
| else if (priv->version) |
| rk_setreg(priv->regs + SWPORT_DDR_L, mask); |
| else |
| setbits_le32(priv->regs + SWPORT_DDR, mask); |
| |
| return 0; |
| } |
| |
| static int rockchip_gpio_get_function(struct udevice *dev, unsigned offset) |
| { |
| struct rockchip_gpio_priv *priv = dev_get_priv(dev); |
| u32 mask = BIT(offset), data; |
| int ret; |
| |
| if (CONFIG_IS_ENABLED(PINCTRL)) { |
| ret = pinctrl_get_gpio_mux(priv->pinctrl, priv->bank, offset); |
| if (ret < 0) |
| return ret; |
| else if (ret != RK_FUNC_GPIO) |
| return GPIOF_FUNC; |
| } |
| |
| if (priv->version && offset >= 16) |
| data = readl(priv->regs + SWPORT_DDR_H) << 16; |
| else if (priv->version) |
| data = readl(priv->regs + SWPORT_DDR_L); |
| else |
| data = readl(priv->regs + SWPORT_DDR); |
| |
| return (data & mask) ? GPIOF_OUTPUT : GPIOF_INPUT; |
| } |
| |
| /* Simple SPL interface to GPIOs */ |
| #ifdef CONFIG_SPL_BUILD |
| |
| enum { |
| PULL_NONE_1V8 = 0, |
| PULL_DOWN_1V8 = 1, |
| PULL_UP_1V8 = 3, |
| }; |
| |
| int spl_gpio_set_pull(void *vregs, uint gpio, int pull) |
| { |
| u32 *regs = vregs; |
| uint val; |
| |
| regs += gpio >> GPIO_BANK_SHIFT; |
| gpio &= GPIO_OFFSET_MASK; |
| switch (pull) { |
| case GPIO_PULL_UP: |
| val = PULL_UP_1V8; |
| break; |
| case GPIO_PULL_DOWN: |
| val = PULL_DOWN_1V8; |
| break; |
| case GPIO_PULL_NORMAL: |
| default: |
| val = PULL_NONE_1V8; |
| break; |
| } |
| clrsetbits_le32(regs, 3 << (gpio * 2), val << (gpio * 2)); |
| |
| return 0; |
| } |
| |
| int spl_gpio_output(void *vregs, uint gpio, int value) |
| { |
| struct rockchip_gpio_regs * const regs = vregs; |
| |
| clrsetbits_le32(®s->swport_dr, 1 << gpio, value << gpio); |
| |
| /* Set direction */ |
| clrsetbits_le32(®s->swport_ddr, 1 << gpio, 1 << gpio); |
| |
| return 0; |
| } |
| #endif /* CONFIG_SPL_BUILD */ |
| |
| static int rockchip_gpio_probe(struct udevice *dev) |
| { |
| struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
| struct rockchip_gpio_priv *priv = dev_get_priv(dev); |
| struct ofnode_phandle_args args; |
| char *end; |
| int ret; |
| |
| priv->regs = dev_read_addr_ptr(dev); |
| |
| if (CONFIG_IS_ENABLED(PINCTRL)) { |
| ret = uclass_first_device_err(UCLASS_PINCTRL, &priv->pinctrl); |
| if (ret) |
| return ret; |
| } |
| |
| /* |
| * If "gpio-ranges" is present in the devicetree use it to parse |
| * the GPIO bank ID, otherwise use the legacy method. |
| */ |
| ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), |
| "gpio-ranges", NULL, 3, |
| 0, &args); |
| if (!ret || ret != -ENOENT) { |
| uc_priv->gpio_count = args.args[2]; |
| priv->bank = args.args[1] / ROCKCHIP_GPIOS_PER_BANK; |
| } else { |
| uc_priv->gpio_count = ROCKCHIP_GPIOS_PER_BANK; |
| end = strrchr(dev->name, '@'); |
| priv->bank = trailing_strtoln(dev->name, end); |
| } |
| |
| priv->name[0] = 'A' + priv->bank; |
| uc_priv->bank_name = priv->name; |
| |
| priv->version = readl(priv->regs + VER_ID_V2); |
| |
| return 0; |
| } |
| |
| static const struct dm_gpio_ops gpio_rockchip_ops = { |
| .direction_input = rockchip_gpio_direction_input, |
| .direction_output = rockchip_gpio_direction_output, |
| .get_value = rockchip_gpio_get_value, |
| .set_value = rockchip_gpio_set_value, |
| .get_function = rockchip_gpio_get_function, |
| }; |
| |
| static const struct udevice_id rockchip_gpio_ids[] = { |
| { .compatible = "rockchip,gpio-bank" }, |
| { } |
| }; |
| |
| U_BOOT_DRIVER(rockchip_gpio_bank) = { |
| .name = "rockchip_gpio_bank", |
| .id = UCLASS_GPIO, |
| .of_match = rockchip_gpio_ids, |
| .ops = &gpio_rockchip_ops, |
| .priv_auto = sizeof(struct rockchip_gpio_priv), |
| .probe = rockchip_gpio_probe, |
| }; |