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OpenCloudOS-Kernel/drivers/gpio/gpio-tegra186.c

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// 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 void *tegra186_gpio_populate_parent_fwspec(struct gpio_chip *chip,
unsigned int parent_hwirq,
unsigned int parent_type)
{
struct tegra_gpio *gpio = gpiochip_get_data(chip);
struct irq_fwspec *fwspec;
fwspec = kmalloc(sizeof(*fwspec), GFP_KERNEL);
if (!fwspec)
return NULL;
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 fwspec;
}
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");
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