diff options
Diffstat (limited to 'drivers/gpio/gpio-tegra186.c')
| -rw-r--r-- | drivers/gpio/gpio-tegra186.c | 1240 |
1 files changed, 1240 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-tegra186.c b/drivers/gpio/gpio-tegra186.c new file mode 100644 index 000000000..54d9fa7da --- /dev/null +++ b/drivers/gpio/gpio-tegra186.c @@ -0,0 +1,1240 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2016-2022 NVIDIA Corporation + * + * Author: Thierry Reding <treding@nvidia.com> + * Dipen Patel <dpatel@nvidia.com> + */ + +#include <linux/gpio/driver.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/hte.h> + +#include <dt-bindings/gpio/tegra186-gpio.h> +#include <dt-bindings/gpio/tegra194-gpio.h> +#include <dt-bindings/gpio/tegra234-gpio.h> +#include <dt-bindings/gpio/tegra241-gpio.h> + +/* security registers */ +#define TEGRA186_GPIO_CTL_SCR 0x0c +#define TEGRA186_GPIO_CTL_SCR_SEC_WEN BIT(28) +#define TEGRA186_GPIO_CTL_SCR_SEC_REN BIT(27) + +#define TEGRA186_GPIO_INT_ROUTE_MAPPING(p, x) (0x14 + (p) * 0x20 + (x) * 4) + +/* control registers */ +#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_NONE (0x0 << 2) +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL (0x1 << 2) +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE (0x2 << 2) +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE (0x3 << 2) +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK (0x3 << 2) +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL BIT(4) +#define TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE BIT(5) +#define TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT BIT(6) +#define TEGRA186_GPIO_ENABLE_CONFIG_TIMESTAMP_FUNC BIT(7) + +#define TEGRA186_GPIO_DEBOUNCE_CONTROL 0x04 +#define TEGRA186_GPIO_DEBOUNCE_CONTROL_THRESHOLD(x) ((x) & 0xff) + +#define TEGRA186_GPIO_INPUT 0x08 +#define TEGRA186_GPIO_INPUT_HIGH BIT(0) + +#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 BIT(0) + +#define TEGRA186_GPIO_INTERRUPT_CLEAR 0x14 + +#define TEGRA186_GPIO_INTERRUPT_STATUS(x) (0x100 + (x) * 4) + +struct tegra_gpio_port { + const char *name; + unsigned int bank; + unsigned int port; + unsigned int pins; +}; + +struct tegra186_pin_range { + unsigned int offset; + const char *group; +}; + +struct tegra_gpio_soc { + const struct tegra_gpio_port *ports; + unsigned int num_ports; + const char *name; + unsigned int instance; + + unsigned int num_irqs_per_bank; + + const struct tegra186_pin_range *pin_ranges; + unsigned int num_pin_ranges; + const char *pinmux; + bool has_gte; +}; + +struct tegra_gpio { + struct gpio_chip gpio; + unsigned int num_irq; + unsigned int *irq; + + const struct tegra_gpio_soc *soc; + unsigned int num_irqs_per_bank; + unsigned int num_banks; + + void __iomem *secure; + void __iomem *base; +}; + +static const struct tegra_gpio_port * +tegra186_gpio_get_port(struct tegra_gpio *gpio, unsigned int *pin) +{ + unsigned int start = 0, i; + + for (i = 0; i < gpio->soc->num_ports; i++) { + const struct tegra_gpio_port *port = &gpio->soc->ports[i]; + + if (*pin >= start && *pin < start + port->pins) { + *pin -= start; + return port; + } + + start += port->pins; + } + + return NULL; +} + +static void __iomem *tegra186_gpio_get_base(struct tegra_gpio *gpio, + unsigned int pin) +{ + const struct tegra_gpio_port *port; + unsigned int offset; + + port = tegra186_gpio_get_port(gpio, &pin); + if (!port) + return NULL; + + offset = port->bank * 0x1000 + port->port * 0x200; + + return gpio->base + offset + pin * 0x20; +} + +static int tegra186_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + void __iomem *base; + u32 value; + + base = tegra186_gpio_get_base(gpio, offset); + if (WARN_ON(base == NULL)) + return -ENODEV; + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT) + return GPIO_LINE_DIRECTION_OUT; + + return GPIO_LINE_DIRECTION_IN; +} + +static int tegra186_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + void __iomem *base; + u32 value; + + base = tegra186_gpio_get_base(gpio, offset); + if (WARN_ON(base == NULL)) + return -ENODEV; + + value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL); + value |= TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED; + writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL); + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE; + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_OUT; + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); + + return 0; +} + +static int tegra186_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int level) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + void __iomem *base; + u32 value; + + /* configure output level first */ + chip->set(chip, offset, level); + + base = tegra186_gpio_get_base(gpio, offset); + if (WARN_ON(base == NULL)) + return -EINVAL; + + /* set the direction */ + value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL); + value &= ~TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED; + writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL); + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE; + value |= TEGRA186_GPIO_ENABLE_CONFIG_OUT; + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); + + return 0; +} + +#define HTE_BOTH_EDGES (HTE_RISING_EDGE_TS | HTE_FALLING_EDGE_TS) + +static int tegra186_gpio_en_hw_ts(struct gpio_chip *gc, u32 offset, + unsigned long flags) +{ + struct tegra_gpio *gpio; + void __iomem *base; + int value; + + if (!gc) + return -EINVAL; + + gpio = gpiochip_get_data(gc); + if (!gpio) + return -ENODEV; + + base = tegra186_gpio_get_base(gpio, offset); + if (WARN_ON(base == NULL)) + return -EINVAL; + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value |= TEGRA186_GPIO_ENABLE_CONFIG_TIMESTAMP_FUNC; + + if (flags == HTE_BOTH_EDGES) { + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE; + } else if (flags == HTE_RISING_EDGE_TS) { + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; + } else if (flags == HTE_FALLING_EDGE_TS) { + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; + } + + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); + + return 0; +} + +static int tegra186_gpio_dis_hw_ts(struct gpio_chip *gc, u32 offset, + unsigned long flags) +{ + struct tegra_gpio *gpio; + void __iomem *base; + int value; + + if (!gc) + return -EINVAL; + + gpio = gpiochip_get_data(gc); + if (!gpio) + return -ENODEV; + + base = tegra186_gpio_get_base(gpio, offset); + if (WARN_ON(base == NULL)) + return -EINVAL; + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TIMESTAMP_FUNC; + if (flags == HTE_BOTH_EDGES) { + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE; + } else if (flags == HTE_RISING_EDGE_TS) { + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; + } else if (flags == HTE_FALLING_EDGE_TS) { + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; + } + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); + + return 0; +} + +static int tegra186_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + void __iomem *base; + u32 value; + + base = tegra186_gpio_get_base(gpio, offset); + if (WARN_ON(base == NULL)) + return -ENODEV; + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT) + value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE); + else + value = readl(base + TEGRA186_GPIO_INPUT); + + return value & BIT(0); +} + +static void tegra186_gpio_set(struct gpio_chip *chip, unsigned int offset, + int level) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + void __iomem *base; + u32 value; + + base = tegra186_gpio_get_base(gpio, offset); + if (WARN_ON(base == NULL)) + return; + + value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE); + if (level == 0) + value &= ~TEGRA186_GPIO_OUTPUT_VALUE_HIGH; + else + value |= TEGRA186_GPIO_OUTPUT_VALUE_HIGH; + + writel(value, base + TEGRA186_GPIO_OUTPUT_VALUE); +} + +static int tegra186_gpio_set_config(struct gpio_chip *chip, + unsigned int offset, + unsigned long config) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + u32 debounce, value; + void __iomem *base; + + base = tegra186_gpio_get_base(gpio, offset); + if (base == NULL) + return -ENXIO; + + if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE) + return -ENOTSUPP; + + debounce = pinconf_to_config_argument(config); + + /* + * The Tegra186 GPIO controller supports a maximum of 255 ms debounce + * time. + */ + if (debounce > 255000) + return -EINVAL; + + debounce = DIV_ROUND_UP(debounce, USEC_PER_MSEC); + + value = TEGRA186_GPIO_DEBOUNCE_CONTROL_THRESHOLD(debounce); + writel(value, base + TEGRA186_GPIO_DEBOUNCE_CONTROL); + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value |= TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE; + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); + + return 0; +} + +static int tegra186_gpio_add_pin_ranges(struct gpio_chip *chip) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + struct pinctrl_dev *pctldev; + struct device_node *np; + unsigned int i, j; + int err; + + if (!gpio->soc->pinmux || gpio->soc->num_pin_ranges == 0) + return 0; + + np = of_find_compatible_node(NULL, NULL, gpio->soc->pinmux); + if (!np) + return -ENODEV; + + pctldev = of_pinctrl_get(np); + of_node_put(np); + if (!pctldev) + return -EPROBE_DEFER; + + for (i = 0; i < gpio->soc->num_pin_ranges; i++) { + unsigned int pin = gpio->soc->pin_ranges[i].offset, port; + const char *group = gpio->soc->pin_ranges[i].group; + + port = pin / 8; + pin = pin % 8; + + if (port >= gpio->soc->num_ports) { + dev_warn(chip->parent, "invalid port %u for %s\n", + port, group); + continue; + } + + for (j = 0; j < port; j++) + pin += gpio->soc->ports[j].pins; + + err = gpiochip_add_pingroup_range(chip, pctldev, pin, group); + if (err < 0) + return err; + } + + return 0; +} + +static int tegra186_gpio_of_xlate(struct gpio_chip *chip, + const struct of_phandle_args *spec, + u32 *flags) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + unsigned int port, pin, i, offset = 0; + + if (WARN_ON(chip->of_gpio_n_cells < 2)) + return -EINVAL; + + if (WARN_ON(spec->args_count < chip->of_gpio_n_cells)) + return -EINVAL; + + port = spec->args[0] / 8; + pin = spec->args[0] % 8; + + if (port >= gpio->soc->num_ports) { + dev_err(chip->parent, "invalid port number: %u\n", port); + return -EINVAL; + } + + for (i = 0; i < port; i++) + offset += gpio->soc->ports[i].pins; + + if (flags) + *flags = spec->args[1]; + + return offset + pin; +} + +#define to_tegra_gpio(x) container_of((x), struct tegra_gpio, gpio) + +static void tegra186_irq_ack(struct irq_data *data) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct tegra_gpio *gpio = to_tegra_gpio(gc); + void __iomem *base; + + base = tegra186_gpio_get_base(gpio, data->hwirq); + if (WARN_ON(base == NULL)) + return; + + writel(1, base + TEGRA186_GPIO_INTERRUPT_CLEAR); +} + +static void tegra186_irq_mask(struct irq_data *data) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct tegra_gpio *gpio = to_tegra_gpio(gc); + void __iomem *base; + u32 value; + + base = tegra186_gpio_get_base(gpio, data->hwirq); + if (WARN_ON(base == NULL)) + return; + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT; + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); + + gpiochip_disable_irq(&gpio->gpio, data->hwirq); +} + +static void tegra186_irq_unmask(struct irq_data *data) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct tegra_gpio *gpio = to_tegra_gpio(gc); + void __iomem *base; + u32 value; + + base = tegra186_gpio_get_base(gpio, data->hwirq); + if (WARN_ON(base == NULL)) + return; + + gpiochip_enable_irq(&gpio->gpio, data->hwirq); + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value |= TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT; + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); +} + +static int tegra186_irq_set_type(struct irq_data *data, unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct tegra_gpio *gpio = to_tegra_gpio(gc); + void __iomem *base; + u32 value; + + base = tegra186_gpio_get_base(gpio, data->hwirq); + if (WARN_ON(base == NULL)) + return -ENODEV; + + value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK; + value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; + + switch (type & IRQ_TYPE_SENSE_MASK) { + case IRQ_TYPE_NONE: + break; + + case IRQ_TYPE_EDGE_RISING: + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; + break; + + case IRQ_TYPE_EDGE_FALLING: + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; + break; + + case IRQ_TYPE_EDGE_BOTH: + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE; + break; + + case IRQ_TYPE_LEVEL_HIGH: + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL; + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; + break; + + case IRQ_TYPE_LEVEL_LOW: + value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL; + break; + + default: + return -EINVAL; + } + + writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); + + if ((type & IRQ_TYPE_EDGE_BOTH) == 0) + irq_set_handler_locked(data, handle_level_irq); + else + irq_set_handler_locked(data, handle_edge_irq); + + if (data->parent_data) + return irq_chip_set_type_parent(data, type); + + return 0; +} + +static int tegra186_irq_set_wake(struct irq_data *data, unsigned int on) +{ + if (data->parent_data) + return irq_chip_set_wake_parent(data, on); + + return 0; +} + +static void tegra186_irq_print_chip(struct irq_data *data, struct seq_file *p) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + + seq_printf(p, dev_name(gc->parent)); +} + +static const struct irq_chip tegra186_gpio_irq_chip = { + .irq_ack = tegra186_irq_ack, + .irq_mask = tegra186_irq_mask, + .irq_unmask = tegra186_irq_unmask, + .irq_set_type = tegra186_irq_set_type, + .irq_set_wake = tegra186_irq_set_wake, + .irq_print_chip = tegra186_irq_print_chip, + .flags = IRQCHIP_IMMUTABLE, + GPIOCHIP_IRQ_RESOURCE_HELPERS, +}; + +static void tegra186_gpio_irq(struct irq_desc *desc) +{ + struct tegra_gpio *gpio = irq_desc_get_handler_data(desc); + struct irq_domain *domain = gpio->gpio.irq.domain; + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned int parent = irq_desc_get_irq(desc); + unsigned int i, j, offset = 0; + + chained_irq_enter(chip, desc); + + for (i = 0; i < gpio->soc->num_ports; i++) { + const struct tegra_gpio_port *port = &gpio->soc->ports[i]; + unsigned int pin; + unsigned long value; + void __iomem *base; + + base = gpio->base + port->bank * 0x1000 + port->port * 0x200; + + /* skip ports that are not associated with this bank */ + for (j = 0; j < gpio->num_irqs_per_bank; j++) { + if (parent == gpio->irq[port->bank * gpio->num_irqs_per_bank + j]) + break; + } + + if (j == gpio->num_irqs_per_bank) + goto skip; + + value = readl(base + TEGRA186_GPIO_INTERRUPT_STATUS(1)); + + for_each_set_bit(pin, &value, port->pins) { + int ret = generic_handle_domain_irq(domain, offset + pin); + WARN_RATELIMIT(ret, "hwirq = %d", offset + pin); + } + +skip: + offset += port->pins; + } + + chained_irq_exit(chip, desc); +} + +static int tegra186_gpio_irq_domain_translate(struct irq_domain *domain, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + struct tegra_gpio *gpio = gpiochip_get_data(domain->host_data); + unsigned int port, pin, i, offset = 0; + + if (WARN_ON(gpio->gpio.of_gpio_n_cells < 2)) + return -EINVAL; + + if (WARN_ON(fwspec->param_count < gpio->gpio.of_gpio_n_cells)) + return -EINVAL; + + port = fwspec->param[0] / 8; + pin = fwspec->param[0] % 8; + + if (port >= gpio->soc->num_ports) + return -EINVAL; + + for (i = 0; i < port; i++) + offset += gpio->soc->ports[i].pins; + + *type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK; + *hwirq = offset + pin; + + return 0; +} + +static int tegra186_gpio_populate_parent_fwspec(struct gpio_chip *chip, + union gpio_irq_fwspec *gfwspec, + unsigned int parent_hwirq, + unsigned int parent_type) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + struct irq_fwspec *fwspec = &gfwspec->fwspec; + + fwspec->fwnode = chip->irq.parent_domain->fwnode; + fwspec->param_count = 3; + fwspec->param[0] = gpio->soc->instance; + fwspec->param[1] = parent_hwirq; + fwspec->param[2] = parent_type; + + return 0; +} + +static int tegra186_gpio_child_to_parent_hwirq(struct gpio_chip *chip, + unsigned int hwirq, + unsigned int type, + unsigned int *parent_hwirq, + unsigned int *parent_type) +{ + *parent_hwirq = chip->irq.child_offset_to_irq(chip, hwirq); + *parent_type = type; + + return 0; +} + +static unsigned int tegra186_gpio_child_offset_to_irq(struct gpio_chip *chip, + unsigned int offset) +{ + struct tegra_gpio *gpio = gpiochip_get_data(chip); + unsigned int i; + + for (i = 0; i < gpio->soc->num_ports; i++) { + if (offset < gpio->soc->ports[i].pins) + break; + + offset -= gpio->soc->ports[i].pins; + } + + return offset + i * 8; +} + +static const struct of_device_id tegra186_pmc_of_match[] = { + { .compatible = "nvidia,tegra186-pmc" }, + { .compatible = "nvidia,tegra194-pmc" }, + { /* sentinel */ } +}; + +static void tegra186_gpio_init_route_mapping(struct tegra_gpio *gpio) +{ + struct device *dev = gpio->gpio.parent; + unsigned int i, j; + u32 value; + + for (i = 0; i < gpio->soc->num_ports; i++) { + const struct tegra_gpio_port *port = &gpio->soc->ports[i]; + unsigned int offset, p = port->port; + void __iomem *base; + + base = gpio->secure + port->bank * 0x1000 + 0x800; + + value = readl(base + TEGRA186_GPIO_CTL_SCR); + + /* + * For controllers that haven't been locked down yet, make + * sure to program the default interrupt route mapping. + */ + if ((value & TEGRA186_GPIO_CTL_SCR_SEC_REN) == 0 && + (value & TEGRA186_GPIO_CTL_SCR_SEC_WEN) == 0) { + /* + * On Tegra194 and later, each pin can be routed to one or more + * interrupts. + */ + for (j = 0; j < gpio->num_irqs_per_bank; j++) { + dev_dbg(dev, "programming default interrupt routing for port %s\n", + port->name); + + offset = TEGRA186_GPIO_INT_ROUTE_MAPPING(p, j); + + /* + * By default we only want to route GPIO pins to IRQ 0. This works + * only under the assumption that we're running as the host kernel + * and hence all GPIO pins are owned by Linux. + * + * For cases where Linux is the guest OS, the hypervisor will have + * to configure the interrupt routing and pass only the valid + * interrupts via device tree. + */ + if (j == 0) { + value = readl(base + offset); + value = BIT(port->pins) - 1; + writel(value, base + offset); + } + } + } + } +} + +static unsigned int tegra186_gpio_irqs_per_bank(struct tegra_gpio *gpio) +{ + struct device *dev = gpio->gpio.parent; + + if (gpio->num_irq > gpio->num_banks) { + if (gpio->num_irq % gpio->num_banks != 0) + goto error; + } + + if (gpio->num_irq < gpio->num_banks) + goto error; + + gpio->num_irqs_per_bank = gpio->num_irq / gpio->num_banks; + + if (gpio->num_irqs_per_bank > gpio->soc->num_irqs_per_bank) + goto error; + + return 0; + +error: + dev_err(dev, "invalid number of interrupts (%u) for %u banks\n", + gpio->num_irq, gpio->num_banks); + return -EINVAL; +} + +static int tegra186_gpio_probe(struct platform_device *pdev) +{ + unsigned int i, j, offset; + struct gpio_irq_chip *irq; + struct tegra_gpio *gpio; + struct device_node *np; + char **names; + int err; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + gpio->soc = device_get_match_data(&pdev->dev); + gpio->gpio.label = gpio->soc->name; + gpio->gpio.parent = &pdev->dev; + + /* count the number of banks in the controller */ + for (i = 0; i < gpio->soc->num_ports; i++) + if (gpio->soc->ports[i].bank > gpio->num_banks) + gpio->num_banks = gpio->soc->ports[i].bank; + + gpio->num_banks++; + + /* get register apertures */ + gpio->secure = devm_platform_ioremap_resource_byname(pdev, "security"); + if (IS_ERR(gpio->secure)) { + gpio->secure = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(gpio->secure)) + return PTR_ERR(gpio->secure); + } + + gpio->base = devm_platform_ioremap_resource_byname(pdev, "gpio"); + if (IS_ERR(gpio->base)) { + gpio->base = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(gpio->base)) + return PTR_ERR(gpio->base); + } + + err = platform_irq_count(pdev); + if (err < 0) + return err; + + gpio->num_irq = err; + + err = tegra186_gpio_irqs_per_bank(gpio); + if (err < 0) + return err; + + gpio->irq = devm_kcalloc(&pdev->dev, gpio->num_irq, sizeof(*gpio->irq), + GFP_KERNEL); + if (!gpio->irq) + return -ENOMEM; + + for (i = 0; i < gpio->num_irq; i++) { + err = platform_get_irq(pdev, i); + if (err < 0) + return err; + + gpio->irq[i] = err; + } + + gpio->gpio.request = gpiochip_generic_request; + gpio->gpio.free = gpiochip_generic_free; + gpio->gpio.get_direction = tegra186_gpio_get_direction; + gpio->gpio.direction_input = tegra186_gpio_direction_input; + gpio->gpio.direction_output = tegra186_gpio_direction_output; + gpio->gpio.get = tegra186_gpio_get; + gpio->gpio.set = tegra186_gpio_set; + gpio->gpio.set_config = tegra186_gpio_set_config; + gpio->gpio.add_pin_ranges = tegra186_gpio_add_pin_ranges; + if (gpio->soc->has_gte) { + gpio->gpio.en_hw_timestamp = tegra186_gpio_en_hw_ts; + gpio->gpio.dis_hw_timestamp = tegra186_gpio_dis_hw_ts; + } + + gpio->gpio.base = -1; + + for (i = 0; i < gpio->soc->num_ports; i++) + gpio->gpio.ngpio += gpio->soc->ports[i].pins; + + names = devm_kcalloc(gpio->gpio.parent, gpio->gpio.ngpio, + sizeof(*names), GFP_KERNEL); + if (!names) + return -ENOMEM; + + for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) { + const struct tegra_gpio_port *port = &gpio->soc->ports[i]; + char *name; + + for (j = 0; j < port->pins; j++) { + name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL, + "P%s.%02x", port->name, j); + if (!name) + return -ENOMEM; + + names[offset + j] = name; + } + + offset += port->pins; + } + + gpio->gpio.names = (const char * const *)names; + +#if defined(CONFIG_OF_GPIO) + gpio->gpio.of_gpio_n_cells = 2; + gpio->gpio.of_xlate = tegra186_gpio_of_xlate; +#endif /* CONFIG_OF_GPIO */ + + irq = &gpio->gpio.irq; + gpio_irq_chip_set_chip(irq, &tegra186_gpio_irq_chip); + irq->fwnode = of_node_to_fwnode(pdev->dev.of_node); + irq->child_to_parent_hwirq = tegra186_gpio_child_to_parent_hwirq; + irq->populate_parent_alloc_arg = tegra186_gpio_populate_parent_fwspec; + irq->child_offset_to_irq = tegra186_gpio_child_offset_to_irq; + irq->child_irq_domain_ops.translate = tegra186_gpio_irq_domain_translate; + irq->handler = handle_simple_irq; + irq->default_type = IRQ_TYPE_NONE; + irq->parent_handler = tegra186_gpio_irq; + irq->parent_handler_data = gpio; + irq->num_parents = gpio->num_irq; + + /* + * To simplify things, use a single interrupt per bank for now. Some + * chips support up to 8 interrupts per bank, which can be useful to + * distribute the load and decrease the processing latency for GPIOs + * but it also requires a more complicated interrupt routing than we + * currently program. + */ + if (gpio->num_irqs_per_bank > 1) { + irq->parents = devm_kcalloc(&pdev->dev, gpio->num_banks, + sizeof(*irq->parents), GFP_KERNEL); + if (!irq->parents) + return -ENOMEM; + + for (i = 0; i < gpio->num_banks; i++) + irq->parents[i] = gpio->irq[i * gpio->num_irqs_per_bank]; + + irq->num_parents = gpio->num_banks; + } else { + irq->num_parents = gpio->num_irq; + irq->parents = gpio->irq; + } + + if (gpio->soc->num_irqs_per_bank > 1) + tegra186_gpio_init_route_mapping(gpio); + + np = of_find_matching_node(NULL, tegra186_pmc_of_match); + if (np) { + irq->parent_domain = irq_find_host(np); + of_node_put(np); + + if (!irq->parent_domain) + return -EPROBE_DEFER; + } + + irq->map = devm_kcalloc(&pdev->dev, gpio->gpio.ngpio, + sizeof(*irq->map), GFP_KERNEL); + if (!irq->map) + return -ENOMEM; + + for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) { + const struct tegra_gpio_port *port = &gpio->soc->ports[i]; + + for (j = 0; j < port->pins; j++) + irq->map[offset + j] = irq->parents[port->bank]; + + offset += port->pins; + } + + return devm_gpiochip_add_data(&pdev->dev, &gpio->gpio, gpio); +} + +#define TEGRA186_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA186_MAIN_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra186_main_ports[] = { + TEGRA186_MAIN_GPIO_PORT( A, 2, 0, 7), + TEGRA186_MAIN_GPIO_PORT( B, 3, 0, 7), + TEGRA186_MAIN_GPIO_PORT( C, 3, 1, 7), + TEGRA186_MAIN_GPIO_PORT( D, 3, 2, 6), + TEGRA186_MAIN_GPIO_PORT( E, 2, 1, 8), + TEGRA186_MAIN_GPIO_PORT( F, 2, 2, 6), + TEGRA186_MAIN_GPIO_PORT( G, 4, 1, 6), + TEGRA186_MAIN_GPIO_PORT( H, 1, 0, 7), + TEGRA186_MAIN_GPIO_PORT( I, 0, 4, 8), + TEGRA186_MAIN_GPIO_PORT( J, 5, 0, 8), + TEGRA186_MAIN_GPIO_PORT( K, 5, 1, 1), + TEGRA186_MAIN_GPIO_PORT( L, 1, 1, 8), + TEGRA186_MAIN_GPIO_PORT( M, 5, 3, 6), + TEGRA186_MAIN_GPIO_PORT( N, 0, 0, 7), + TEGRA186_MAIN_GPIO_PORT( O, 0, 1, 4), + TEGRA186_MAIN_GPIO_PORT( P, 4, 0, 7), + TEGRA186_MAIN_GPIO_PORT( Q, 0, 2, 6), + TEGRA186_MAIN_GPIO_PORT( R, 0, 5, 6), + TEGRA186_MAIN_GPIO_PORT( T, 0, 3, 4), + TEGRA186_MAIN_GPIO_PORT( X, 1, 2, 8), + TEGRA186_MAIN_GPIO_PORT( Y, 1, 3, 7), + TEGRA186_MAIN_GPIO_PORT(BB, 2, 3, 2), + TEGRA186_MAIN_GPIO_PORT(CC, 5, 2, 4), +}; + +static const struct tegra_gpio_soc tegra186_main_soc = { + .num_ports = ARRAY_SIZE(tegra186_main_ports), + .ports = tegra186_main_ports, + .name = "tegra186-gpio", + .instance = 0, + .num_irqs_per_bank = 1, +}; + +#define TEGRA186_AON_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA186_AON_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra186_aon_ports[] = { + TEGRA186_AON_GPIO_PORT( S, 0, 1, 5), + TEGRA186_AON_GPIO_PORT( U, 0, 2, 6), + TEGRA186_AON_GPIO_PORT( V, 0, 4, 8), + TEGRA186_AON_GPIO_PORT( W, 0, 5, 8), + TEGRA186_AON_GPIO_PORT( Z, 0, 7, 4), + TEGRA186_AON_GPIO_PORT(AA, 0, 6, 8), + TEGRA186_AON_GPIO_PORT(EE, 0, 3, 3), + TEGRA186_AON_GPIO_PORT(FF, 0, 0, 5), +}; + +static const struct tegra_gpio_soc tegra186_aon_soc = { + .num_ports = ARRAY_SIZE(tegra186_aon_ports), + .ports = tegra186_aon_ports, + .name = "tegra186-gpio-aon", + .instance = 1, + .num_irqs_per_bank = 1, +}; + +#define TEGRA194_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA194_MAIN_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra194_main_ports[] = { + TEGRA194_MAIN_GPIO_PORT( A, 1, 2, 8), + TEGRA194_MAIN_GPIO_PORT( B, 4, 7, 2), + TEGRA194_MAIN_GPIO_PORT( C, 4, 3, 8), + TEGRA194_MAIN_GPIO_PORT( D, 4, 4, 4), + TEGRA194_MAIN_GPIO_PORT( E, 4, 5, 8), + TEGRA194_MAIN_GPIO_PORT( F, 4, 6, 6), + TEGRA194_MAIN_GPIO_PORT( G, 4, 0, 8), + TEGRA194_MAIN_GPIO_PORT( H, 4, 1, 8), + TEGRA194_MAIN_GPIO_PORT( I, 4, 2, 5), + TEGRA194_MAIN_GPIO_PORT( J, 5, 1, 6), + TEGRA194_MAIN_GPIO_PORT( K, 3, 0, 8), + TEGRA194_MAIN_GPIO_PORT( L, 3, 1, 4), + TEGRA194_MAIN_GPIO_PORT( M, 2, 3, 8), + TEGRA194_MAIN_GPIO_PORT( N, 2, 4, 3), + TEGRA194_MAIN_GPIO_PORT( O, 5, 0, 6), + TEGRA194_MAIN_GPIO_PORT( P, 2, 5, 8), + TEGRA194_MAIN_GPIO_PORT( Q, 2, 6, 8), + TEGRA194_MAIN_GPIO_PORT( R, 2, 7, 6), + TEGRA194_MAIN_GPIO_PORT( S, 3, 3, 8), + TEGRA194_MAIN_GPIO_PORT( T, 3, 4, 8), + TEGRA194_MAIN_GPIO_PORT( U, 3, 5, 1), + TEGRA194_MAIN_GPIO_PORT( V, 1, 0, 8), + TEGRA194_MAIN_GPIO_PORT( W, 1, 1, 2), + TEGRA194_MAIN_GPIO_PORT( X, 2, 0, 8), + TEGRA194_MAIN_GPIO_PORT( Y, 2, 1, 8), + TEGRA194_MAIN_GPIO_PORT( Z, 2, 2, 8), + TEGRA194_MAIN_GPIO_PORT(FF, 3, 2, 2), + TEGRA194_MAIN_GPIO_PORT(GG, 0, 0, 2) +}; + +static const struct tegra186_pin_range tegra194_main_pin_ranges[] = { + { TEGRA194_MAIN_GPIO(GG, 0), "pex_l5_clkreq_n_pgg0" }, + { TEGRA194_MAIN_GPIO(GG, 1), "pex_l5_rst_n_pgg1" }, +}; + +static const struct tegra_gpio_soc tegra194_main_soc = { + .num_ports = ARRAY_SIZE(tegra194_main_ports), + .ports = tegra194_main_ports, + .name = "tegra194-gpio", + .instance = 0, + .num_irqs_per_bank = 8, + .num_pin_ranges = ARRAY_SIZE(tegra194_main_pin_ranges), + .pin_ranges = tegra194_main_pin_ranges, + .pinmux = "nvidia,tegra194-pinmux", +}; + +#define TEGRA194_AON_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA194_AON_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra194_aon_ports[] = { + TEGRA194_AON_GPIO_PORT(AA, 0, 3, 8), + TEGRA194_AON_GPIO_PORT(BB, 0, 4, 4), + TEGRA194_AON_GPIO_PORT(CC, 0, 1, 8), + TEGRA194_AON_GPIO_PORT(DD, 0, 2, 3), + TEGRA194_AON_GPIO_PORT(EE, 0, 0, 7) +}; + +static const struct tegra_gpio_soc tegra194_aon_soc = { + .num_ports = ARRAY_SIZE(tegra194_aon_ports), + .ports = tegra194_aon_ports, + .name = "tegra194-gpio-aon", + .instance = 1, + .num_irqs_per_bank = 8, + .has_gte = true, +}; + +#define TEGRA234_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA234_MAIN_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra234_main_ports[] = { + TEGRA234_MAIN_GPIO_PORT( A, 0, 0, 8), + TEGRA234_MAIN_GPIO_PORT( B, 0, 3, 1), + TEGRA234_MAIN_GPIO_PORT( C, 5, 1, 8), + TEGRA234_MAIN_GPIO_PORT( D, 5, 2, 4), + TEGRA234_MAIN_GPIO_PORT( E, 5, 3, 8), + TEGRA234_MAIN_GPIO_PORT( F, 5, 4, 6), + TEGRA234_MAIN_GPIO_PORT( G, 4, 0, 8), + TEGRA234_MAIN_GPIO_PORT( H, 4, 1, 8), + TEGRA234_MAIN_GPIO_PORT( I, 4, 2, 7), + TEGRA234_MAIN_GPIO_PORT( J, 5, 0, 6), + TEGRA234_MAIN_GPIO_PORT( K, 3, 0, 8), + TEGRA234_MAIN_GPIO_PORT( L, 3, 1, 4), + TEGRA234_MAIN_GPIO_PORT( M, 2, 0, 8), + TEGRA234_MAIN_GPIO_PORT( N, 2, 1, 8), + TEGRA234_MAIN_GPIO_PORT( P, 2, 2, 8), + TEGRA234_MAIN_GPIO_PORT( Q, 2, 3, 8), + TEGRA234_MAIN_GPIO_PORT( R, 2, 4, 6), + TEGRA234_MAIN_GPIO_PORT( X, 1, 0, 8), + TEGRA234_MAIN_GPIO_PORT( Y, 1, 1, 8), + TEGRA234_MAIN_GPIO_PORT( Z, 1, 2, 8), + TEGRA234_MAIN_GPIO_PORT(AC, 0, 1, 8), + TEGRA234_MAIN_GPIO_PORT(AD, 0, 2, 4), + TEGRA234_MAIN_GPIO_PORT(AE, 3, 3, 2), + TEGRA234_MAIN_GPIO_PORT(AF, 3, 4, 4), + TEGRA234_MAIN_GPIO_PORT(AG, 3, 2, 8), +}; + +static const struct tegra_gpio_soc tegra234_main_soc = { + .num_ports = ARRAY_SIZE(tegra234_main_ports), + .ports = tegra234_main_ports, + .name = "tegra234-gpio", + .instance = 0, + .num_irqs_per_bank = 8, +}; + +#define TEGRA234_AON_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA234_AON_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra234_aon_ports[] = { + TEGRA234_AON_GPIO_PORT(AA, 0, 4, 8), + TEGRA234_AON_GPIO_PORT(BB, 0, 5, 4), + TEGRA234_AON_GPIO_PORT(CC, 0, 2, 8), + TEGRA234_AON_GPIO_PORT(DD, 0, 3, 3), + TEGRA234_AON_GPIO_PORT(EE, 0, 0, 8), + TEGRA234_AON_GPIO_PORT(GG, 0, 1, 1), +}; + +static const struct tegra_gpio_soc tegra234_aon_soc = { + .num_ports = ARRAY_SIZE(tegra234_aon_ports), + .ports = tegra234_aon_ports, + .name = "tegra234-gpio-aon", + .instance = 1, + .num_irqs_per_bank = 8, +}; + +#define TEGRA241_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA241_MAIN_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra241_main_ports[] = { + TEGRA241_MAIN_GPIO_PORT(A, 0, 0, 8), + TEGRA241_MAIN_GPIO_PORT(B, 0, 1, 8), + TEGRA241_MAIN_GPIO_PORT(C, 0, 2, 2), + TEGRA241_MAIN_GPIO_PORT(D, 0, 3, 6), + TEGRA241_MAIN_GPIO_PORT(E, 0, 4, 8), + TEGRA241_MAIN_GPIO_PORT(F, 1, 0, 8), + TEGRA241_MAIN_GPIO_PORT(G, 1, 1, 8), + TEGRA241_MAIN_GPIO_PORT(H, 1, 2, 8), + TEGRA241_MAIN_GPIO_PORT(J, 1, 3, 8), + TEGRA241_MAIN_GPIO_PORT(K, 1, 4, 4), + TEGRA241_MAIN_GPIO_PORT(L, 1, 5, 6), +}; + +static const struct tegra_gpio_soc tegra241_main_soc = { + .num_ports = ARRAY_SIZE(tegra241_main_ports), + .ports = tegra241_main_ports, + .name = "tegra241-gpio", + .instance = 0, + .num_irqs_per_bank = 8, +}; + +#define TEGRA241_AON_GPIO_PORT(_name, _bank, _port, _pins) \ + [TEGRA241_AON_GPIO_PORT_##_name] = { \ + .name = #_name, \ + .bank = _bank, \ + .port = _port, \ + .pins = _pins, \ + } + +static const struct tegra_gpio_port tegra241_aon_ports[] = { + TEGRA241_AON_GPIO_PORT(AA, 0, 0, 8), + TEGRA241_AON_GPIO_PORT(BB, 0, 0, 4), +}; + +static const struct tegra_gpio_soc tegra241_aon_soc = { + .num_ports = ARRAY_SIZE(tegra241_aon_ports), + .ports = tegra241_aon_ports, + .name = "tegra241-gpio-aon", + .instance = 1, + .num_irqs_per_bank = 8, +}; + +static const struct of_device_id tegra186_gpio_of_match[] = { + { + .compatible = "nvidia,tegra186-gpio", + .data = &tegra186_main_soc + }, { + .compatible = "nvidia,tegra186-gpio-aon", + .data = &tegra186_aon_soc + }, { + .compatible = "nvidia,tegra194-gpio", + .data = &tegra194_main_soc + }, { + .compatible = "nvidia,tegra194-gpio-aon", + .data = &tegra194_aon_soc + }, { + .compatible = "nvidia,tegra234-gpio", + .data = &tegra234_main_soc + }, { + .compatible = "nvidia,tegra234-gpio-aon", + .data = &tegra234_aon_soc + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, tegra186_gpio_of_match); + +static const struct acpi_device_id tegra186_gpio_acpi_match[] = { + { .id = "NVDA0108", .driver_data = (kernel_ulong_t)&tegra186_main_soc }, + { .id = "NVDA0208", .driver_data = (kernel_ulong_t)&tegra186_aon_soc }, + { .id = "NVDA0308", .driver_data = (kernel_ulong_t)&tegra194_main_soc }, + { .id = "NVDA0408", .driver_data = (kernel_ulong_t)&tegra194_aon_soc }, + { .id = "NVDA0508", .driver_data = (kernel_ulong_t)&tegra241_main_soc }, + { .id = "NVDA0608", .driver_data = (kernel_ulong_t)&tegra241_aon_soc }, + {} +}; +MODULE_DEVICE_TABLE(acpi, tegra186_gpio_acpi_match); + +static struct platform_driver tegra186_gpio_driver = { + .driver = { + .name = "tegra186-gpio", + .of_match_table = tegra186_gpio_of_match, + .acpi_match_table = tegra186_gpio_acpi_match, + }, + .probe = tegra186_gpio_probe, +}; +module_platform_driver(tegra186_gpio_driver); + +MODULE_DESCRIPTION("NVIDIA Tegra186 GPIO controller driver"); +MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); +MODULE_LICENSE("GPL v2"); |