diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/rk_gpio.c | 1 | ||||
| -rw-r--r-- | drivers/gpio/tegra186_gpio.c | 288 | ||||
| -rw-r--r-- | drivers/gpio/tegra186_gpio_priv.h | 61 |
5 files changed, 358 insertions, 1 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index f730744..32219ed 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -116,6 +116,14 @@ config TEGRA_GPIO Support for the GPIO controller contained in NVIDIA Tegra20 through Tegra210. +config TEGRA186_GPIO + bool "Tegra186 GPIO driver" + depends on DM_GPIO + help + Support for the GPIO controller contained in NVIDIA Tegra186. This + covers both the "main" and "AON" controller instances, even though + they have slightly different register layout. + config GPIO_UNIPHIER bool "UniPhier GPIO" depends on ARCH_UNIPHIER diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index ddec1ef..3c43101 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_S5P) += s5p_gpio.o obj-$(CONFIG_SANDBOX_GPIO) += sandbox.o obj-$(CONFIG_SPEAR_GPIO) += spear_gpio.o obj-$(CONFIG_TEGRA_GPIO) += tegra_gpio.o +obj-$(CONFIG_TEGRA186_GPIO) += tegra186_gpio.o obj-$(CONFIG_DA8XX_GPIO) += da8xx_gpio.o obj-$(CONFIG_DM644X_GPIO) += da8xx_gpio.o obj-$(CONFIG_ALTERA_PIO) += altera_pio.o diff --git a/drivers/gpio/rk_gpio.c b/drivers/gpio/rk_gpio.c index fefe3ca..64abcba 100644 --- a/drivers/gpio/rk_gpio.c +++ b/drivers/gpio/rk_gpio.c @@ -8,7 +8,6 @@ */ #include <common.h> -#include <clk.h> #include <dm.h> #include <syscon.h> #include <asm/errno.h> diff --git a/drivers/gpio/tegra186_gpio.c b/drivers/gpio/tegra186_gpio.c new file mode 100644 index 0000000..1c68151 --- /dev/null +++ b/drivers/gpio/tegra186_gpio.c @@ -0,0 +1,288 @@ +/* + * Copyright (c) 2010-2016, NVIDIA CORPORATION. + * (based on tegra_gpio.c) + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <dm.h> +#include <malloc.h> +#include <errno.h> +#include <fdtdec.h> +#include <asm/io.h> +#include <asm/bitops.h> +#include <asm/gpio.h> +#include <dm/device-internal.h> +#include <dt-bindings/gpio/gpio.h> +#include "tegra186_gpio_priv.h" + +DECLARE_GLOBAL_DATA_PTR; + +struct tegra186_gpio_port_data { + const char *name; + uint32_t offset; +}; + +struct tegra186_gpio_ctlr_data { + const struct tegra186_gpio_port_data *ports; + uint32_t port_count; +}; + +struct tegra186_gpio_platdata { + const char *name; + uint32_t *regs; +}; + +static uint32_t *tegra186_gpio_reg(struct udevice *dev, uint32_t reg, + uint32_t gpio) +{ + struct tegra186_gpio_platdata *plat = dev->platdata; + uint32_t index = (reg + (gpio * TEGRA186_GPIO_PER_GPIO_STRIDE)) / 4; + + return &(plat->regs[index]); +} + +static int tegra186_gpio_set_out(struct udevice *dev, unsigned offset, + bool output) +{ + uint32_t *reg; + uint32_t rval; + + reg = tegra186_gpio_reg(dev, TEGRA186_GPIO_OUTPUT_CONTROL, offset); + rval = readl(reg); + if (output) + rval &= ~TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED; + else + rval |= TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED; + writel(rval, reg); + + reg = tegra186_gpio_reg(dev, TEGRA186_GPIO_ENABLE_CONFIG, offset); + rval = readl(reg); + if (output) + rval |= TEGRA186_GPIO_ENABLE_CONFIG_OUT; + else + rval &= ~TEGRA186_GPIO_ENABLE_CONFIG_OUT; + rval |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE; + writel(rval, reg); + + return 0; +} + +static int tegra186_gpio_set_val(struct udevice *dev, unsigned offset, bool val) +{ + uint32_t *reg; + uint32_t rval; + + reg = tegra186_gpio_reg(dev, TEGRA186_GPIO_OUTPUT_VALUE, offset); + rval = readl(reg); + if (val) + rval |= TEGRA186_GPIO_OUTPUT_VALUE_HIGH; + else + rval &= ~TEGRA186_GPIO_OUTPUT_VALUE_HIGH; + writel(rval, reg); + + return 0; +} + +static int tegra186_gpio_direction_input(struct udevice *dev, unsigned offset) +{ + return tegra186_gpio_set_out(dev, offset, false); +} + +static int tegra186_gpio_direction_output(struct udevice *dev, unsigned offset, + int value) +{ + int ret; + + ret = tegra186_gpio_set_val(dev, offset, value != 0); + if (ret) + return ret; + return tegra186_gpio_set_out(dev, offset, true); +} + +static int tegra186_gpio_get_value(struct udevice *dev, unsigned offset) +{ + uint32_t *reg; + uint32_t rval; + + reg = tegra186_gpio_reg(dev, TEGRA186_GPIO_ENABLE_CONFIG, offset); + rval = readl(reg); + + if (rval & TEGRA186_GPIO_ENABLE_CONFIG_OUT) + reg = tegra186_gpio_reg(dev, TEGRA186_GPIO_OUTPUT_VALUE, + offset); + else + reg = tegra186_gpio_reg(dev, TEGRA186_GPIO_INPUT, offset); + + rval = readl(reg); + return !!rval; +} + +static int tegra186_gpio_set_value(struct udevice *dev, unsigned offset, + int value) +{ + return tegra186_gpio_set_val(dev, offset, value != 0); +} + +static int tegra186_gpio_get_function(struct udevice *dev, unsigned offset) +{ + uint32_t *reg; + uint32_t rval; + + reg = tegra186_gpio_reg(dev, TEGRA186_GPIO_ENABLE_CONFIG, offset); + rval = readl(reg); + if (rval & TEGRA186_GPIO_ENABLE_CONFIG_OUT) + return GPIOF_OUTPUT; + else + return GPIOF_INPUT; +} + +static int tegra186_gpio_xlate(struct udevice *dev, struct gpio_desc *desc, + struct fdtdec_phandle_args *args) +{ + int gpio, port, ret; + + gpio = args->args[0]; + port = gpio / TEGRA186_GPIO_PER_GPIO_COUNT; + ret = device_get_child(dev, port, &desc->dev); + if (ret) + return ret; + desc->offset = gpio % TEGRA186_GPIO_PER_GPIO_COUNT; + desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0; + + return 0; +} + +static const struct dm_gpio_ops tegra186_gpio_ops = { + .direction_input = tegra186_gpio_direction_input, + .direction_output = tegra186_gpio_direction_output, + .get_value = tegra186_gpio_get_value, + .set_value = tegra186_gpio_set_value, + .get_function = tegra186_gpio_get_function, + .xlate = tegra186_gpio_xlate, +}; + +/** + * We have a top-level GPIO device with no actual GPIOs. It has a child device + * for each port within the controller. + */ +static int tegra186_gpio_bind(struct udevice *parent) +{ + struct tegra186_gpio_platdata *parent_plat = parent->platdata; + struct tegra186_gpio_ctlr_data *ctlr_data = + (struct tegra186_gpio_ctlr_data *)dev_get_driver_data(parent); + uint32_t *regs; + int port, ret; + + /* If this is a child device, there is nothing to do here */ + if (parent_plat) + return 0; + + regs = (uint32_t *)dev_get_addr_name(parent, "gpio"); + if (regs == (uint32_t *)FDT_ADDR_T_NONE) + return -ENODEV; + + for (port = 0; port < ctlr_data->port_count; port++) { + struct tegra186_gpio_platdata *plat; + struct udevice *dev; + + plat = calloc(1, sizeof(*plat)); + if (!plat) + return -ENOMEM; + plat->name = ctlr_data->ports[port].name; + plat->regs = &(regs[ctlr_data->ports[port].offset / 4]); + + ret = device_bind(parent, parent->driver, plat->name, plat, + -1, &dev); + if (ret) + return ret; + dev->of_offset = parent->of_offset; + } + + return 0; +} + +static int tegra186_gpio_probe(struct udevice *dev) +{ + struct tegra186_gpio_platdata *plat = dev->platdata; + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + /* Only child devices have ports */ + if (!plat) + return 0; + + uc_priv->gpio_count = TEGRA186_GPIO_PER_GPIO_COUNT; + uc_priv->bank_name = plat->name; + + return 0; +} + +static const struct tegra186_gpio_port_data tegra186_gpio_main_ports[] = { + {"A", 0x2000}, + {"B", 0x3000}, + {"C", 0x3200}, + {"D", 0x3400}, + {"E", 0x2200}, + {"F", 0x2400}, + {"G", 0x4200}, + {"H", 0x1000}, + {"I", 0x0800}, + {"J", 0x5000}, + {"K", 0x5200}, + {"L", 0x1200}, + {"M", 0x5600}, + {"N", 0x0000}, + {"O", 0x0200}, + {"P", 0x4000}, + {"Q", 0x0400}, + {"R", 0x0a00}, + {"T", 0x0600}, + {"X", 0x1400}, + {"Y", 0x1600}, + {"BB", 0x2600}, + {"CC", 0x5400}, +}; + +static const struct tegra186_gpio_ctlr_data tegra186_gpio_main_data = { + .ports = tegra186_gpio_main_ports, + .port_count = ARRAY_SIZE(tegra186_gpio_main_ports), +}; + +static const struct tegra186_gpio_port_data tegra186_gpio_aon_ports[] = { + {"S", 0x0200}, + {"U", 0x0400}, + {"V", 0x0800}, + {"W", 0x0a00}, + {"Z", 0x0e00}, + {"AA", 0x0c00}, + {"EE", 0x0600}, + {"FF", 0x0000}, +}; + +static const struct tegra186_gpio_ctlr_data tegra186_gpio_aon_data = { + .ports = tegra186_gpio_aon_ports, + .port_count = ARRAY_SIZE(tegra186_gpio_aon_ports), +}; + +static const struct udevice_id tegra186_gpio_ids[] = { + { + .compatible = "nvidia,tegra186-gpio", + .data = (ulong)&tegra186_gpio_main_data, + }, + { + .compatible = "nvidia,tegra186-gpio-aon", + .data = (ulong)&tegra186_gpio_aon_data, + }, + { } +}; + +U_BOOT_DRIVER(tegra186_gpio) = { + .name = "tegra186_gpio", + .id = UCLASS_GPIO, + .of_match = tegra186_gpio_ids, + .bind = tegra186_gpio_bind, + .probe = tegra186_gpio_probe, + .ops = &tegra186_gpio_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/gpio/tegra186_gpio_priv.h b/drivers/gpio/tegra186_gpio_priv.h new file mode 100644 index 0000000..9e85a434 --- /dev/null +++ b/drivers/gpio/tegra186_gpio_priv.h @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2016, NVIDIA CORPORATION. + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#ifndef _TEGRA186_GPIO_PRIV_H_ +#define _TEGRA186_GPIO_PRIV_H_ + +/* + * For each GPIO, there are a set of registers than affect it, all packed + * back-to-back. + */ +#define TEGRA186_GPIO_ENABLE_CONFIG 0x00 +#define TEGRA186_GPIO_ENABLE_CONFIG_ENABLE BIT(0) +#define TEGRA186_GPIO_ENABLE_CONFIG_OUT BIT(1) +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SHIFT 2 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK 3 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_NONE 0 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL 1 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE 2 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE 3 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL_HIGH_RISING BIT(4) +#define TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE_ENABLE BIT(5) +#define TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT_ENABLE BIT(6) +#define TEGRA186_GPIO_ENABLE_CONFIG_TIMESTAMPING_ENABLE BIT(7) + +#define TEGRA186_GPIO_DEBOUNCE_THRESHOLD 0x04 + +#define TEGRA186_GPIO_INPUT 0x08 + +#define TEGRA186_GPIO_OUTPUT_CONTROL 0x0c +#define TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED BIT(0) + +#define TEGRA186_GPIO_OUTPUT_VALUE 0x10 +#define TEGRA186_GPIO_OUTPUT_VALUE_HIGH 1 + +#define TEGRA186_GPIO_INTERRUPT_CLEAR 0x14 + +/* + * 8 GPIOs are packed into a port. Their registers appear back-to-back in the + * port's address space. + */ +#define TEGRA186_GPIO_PER_GPIO_STRIDE 0x20 +#define TEGRA186_GPIO_PER_GPIO_COUNT 8 + +/* + * Per-port registers are packed immediately following all of a port's + * per-GPIO registers. + */ +#define TEGRA186_GPIO_INTERRUPT_STATUS_G 0x100 +#define TEGRA186_GPIO_INTERRUPT_STATUS_G_STRIDE 4 +#define TEGRA186_GPIO_INTERRUPT_STATUS_G_COUNT 8 + +/* + * The registers for multiple ports are packed together back-to-back to form + * the overall controller. + */ +#define TEGRA186_GPIO_PER_PORT_STRIDE 0x200 + +#endif |