summaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorLinus Walleij <linus.walleij@linaro.org>2011-05-24 23:06:52 +0200
committerGrant Likely <grant.likely@secretlab.ca>2011-05-26 17:29:33 -0600
commit06caa7ad8341db2f03165fa763559475cc404584 (patch)
treec0ae571b12d30e66a9792d4914ff9ec86943e419 /arch
parent7812803a3119f7cf375bd04bc019ce2395a7c2fc (diff)
downloadop-kernel-dev-06caa7ad8341db2f03165fa763559475cc404584.zip
op-kernel-dev-06caa7ad8341db2f03165fa763559475cc404584.tar.gz
gpio: move U300 GPIO driver to drivers/gpio
This moves the U300 GPIO driver out of arch/arm/mach-u300 and into the desired location indicated by the subsystem maintainer. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-u300/Makefile2
-rw-r--r--arch/arm/mach-u300/gpio.c700
2 files changed, 1 insertions, 701 deletions
diff --git a/arch/arm/mach-u300/Makefile b/arch/arm/mach-u300/Makefile
index fab46fe..8fd354a 100644
--- a/arch/arm/mach-u300/Makefile
+++ b/arch/arm/mach-u300/Makefile
@@ -2,7 +2,7 @@
# Makefile for the linux kernel, U300 machine.
#
-obj-y := core.o clock.o timer.o gpio.o padmux.o
+obj-y := core.o clock.o timer.o padmux.o
obj-m :=
obj-n :=
obj- :=
diff --git a/arch/arm/mach-u300/gpio.c b/arch/arm/mach-u300/gpio.c
deleted file mode 100644
index d927901..0000000
--- a/arch/arm/mach-u300/gpio.c
+++ /dev/null
@@ -1,700 +0,0 @@
-/*
- *
- * arch/arm/mach-u300/gpio.c
- *
- *
- * Copyright (C) 2007-2009 ST-Ericsson AB
- * License terms: GNU General Public License (GPL) version 2
- * U300 GPIO module.
- * This can driver either of the two basic GPIO cores
- * available in the U300 platforms:
- * COH 901 335 - Used in DB3150 (U300 1.0) and DB3200 (U330 1.0)
- * COH 901 571/3 - Used in DB3210 (U365 2.0) and DB3350 (U335 1.0)
- * Notice that you also have inline macros in <asm-arch/gpio.h>
- * Author: Linus Walleij <linus.walleij@stericsson.com>
- * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
- *
- */
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-
-/* Reference to GPIO block clock */
-static struct clk *clk;
-
-/* Memory resource */
-static struct resource *memres;
-static void __iomem *virtbase;
-static struct device *gpiodev;
-
-struct u300_gpio_port {
- const char *name;
- int irq;
- int number;
-};
-
-
-static struct u300_gpio_port gpio_ports[] = {
- {
- .name = "gpio0",
- .number = 0,
- },
- {
- .name = "gpio1",
- .number = 1,
- },
- {
- .name = "gpio2",
- .number = 2,
- },
-#ifdef U300_COH901571_3
- {
- .name = "gpio3",
- .number = 3,
- },
- {
- .name = "gpio4",
- .number = 4,
- },
-#ifdef CONFIG_MACH_U300_BS335
- {
- .name = "gpio5",
- .number = 5,
- },
- {
- .name = "gpio6",
- .number = 6,
- },
-#endif
-#endif
-
-};
-
-
-#ifdef U300_COH901571_3
-
-/* Default input value */
-#define DEFAULT_OUTPUT_LOW 0
-#define DEFAULT_OUTPUT_HIGH 1
-
-/* GPIO Pull-Up status */
-#define DISABLE_PULL_UP 0
-#define ENABLE_PULL_UP 1
-
-#define GPIO_NOT_USED 0
-#define GPIO_IN 1
-#define GPIO_OUT 2
-
-struct u300_gpio_configuration_data {
- unsigned char pin_usage;
- unsigned char default_output_value;
- unsigned char pull_up;
-};
-
-/* Initial configuration */
-const struct u300_gpio_configuration_data
-u300_gpio_config[U300_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = {
-#ifdef CONFIG_MACH_U300_BS335
- /* Port 0, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_HIGH, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- },
- /* Port 1, pins 0-7 */
- {
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_HIGH, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- },
- /* Port 2, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP}
- },
- /* Port 3, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- },
- /* Port 4, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- },
- /* Port 5, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- },
- /* Port 6, pind 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- }
-#endif
-
-#ifdef CONFIG_MACH_U300_BS365
- /* Port 0, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- },
- /* Port 1, pins 0-7 */
- {
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_HIGH, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP}
- },
- /* Port 2, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, DISABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP}
- },
- /* Port 3, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP}
- },
- /* Port 4, pins 0-7 */
- {
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_IN, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- /* These 4 pins doesn't exist on DB3210 */
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP},
- {GPIO_OUT, DEFAULT_OUTPUT_LOW, ENABLE_PULL_UP}
- }
-#endif
-};
-#endif
-
-
-/* No users == we can power down GPIO */
-static int gpio_users;
-
-struct gpio_struct {
- int (*callback)(void *);
- void *data;
- int users;
-};
-
-static struct gpio_struct gpio_pin[U300_GPIO_MAX];
-
-/*
- * Let drivers register callback in order to get notified when there is
- * an interrupt on the gpio pin
- */
-int gpio_register_callback(unsigned gpio, int (*func)(void *arg), void *data)
-{
- if (gpio_pin[gpio].callback)
- dev_warn(gpiodev, "%s: WARNING: callback already "
- "registered for gpio pin#%d\n", __func__, gpio);
- gpio_pin[gpio].callback = func;
- gpio_pin[gpio].data = data;
-
- return 0;
-}
-EXPORT_SYMBOL(gpio_register_callback);
-
-int gpio_unregister_callback(unsigned gpio)
-{
- if (!gpio_pin[gpio].callback)
- dev_warn(gpiodev, "%s: WARNING: callback already "
- "unregistered for gpio pin#%d\n", __func__, gpio);
- gpio_pin[gpio].callback = NULL;
- gpio_pin[gpio].data = NULL;
-
- return 0;
-}
-EXPORT_SYMBOL(gpio_unregister_callback);
-
-/* Non-zero means valid */
-int gpio_is_valid(int number)
-{
- if (number >= 0 &&
- number < (U300_GPIO_NUM_PORTS * U300_GPIO_PINS_PER_PORT))
- return 1;
- return 0;
-}
-EXPORT_SYMBOL(gpio_is_valid);
-
-int gpio_request(unsigned gpio, const char *label)
-{
- if (gpio_pin[gpio].users)
- return -EINVAL;
- else
- gpio_pin[gpio].users++;
-
- gpio_users++;
-
- return 0;
-}
-EXPORT_SYMBOL(gpio_request);
-
-void gpio_free(unsigned gpio)
-{
- gpio_users--;
- gpio_pin[gpio].users--;
- if (unlikely(gpio_pin[gpio].users < 0)) {
- dev_warn(gpiodev, "warning: gpio#%d release mismatch\n",
- gpio);
- gpio_pin[gpio].users = 0;
- }
-
- return;
-}
-EXPORT_SYMBOL(gpio_free);
-
-/* This returns zero or nonzero */
-int gpio_get_value(unsigned gpio)
-{
- return readl(virtbase + U300_GPIO_PXPDIR +
- PIN_TO_PORT(gpio) * U300_GPIO_PORTX_SPACING) & (1 << (gpio & 0x07));
-}
-EXPORT_SYMBOL(gpio_get_value);
-
-/*
- * We hope that the compiler will optimize away the unused branch
- * in case "value" is a constant
- */
-void gpio_set_value(unsigned gpio, int value)
-{
- u32 val;
- unsigned long flags;
-
- local_irq_save(flags);
- if (value) {
- /* set */
- val = readl(virtbase + U300_GPIO_PXPDOR +
- PIN_TO_PORT(gpio) * U300_GPIO_PORTX_SPACING)
- & (1 << (gpio & 0x07));
- writel(val | (1 << (gpio & 0x07)), virtbase +
- U300_GPIO_PXPDOR +
- PIN_TO_PORT(gpio) * U300_GPIO_PORTX_SPACING);
- } else {
- /* clear */
- val = readl(virtbase + U300_GPIO_PXPDOR +
- PIN_TO_PORT(gpio) * U300_GPIO_PORTX_SPACING)
- & (1 << (gpio & 0x07));
- writel(val & ~(1 << (gpio & 0x07)), virtbase +
- U300_GPIO_PXPDOR +
- PIN_TO_PORT(gpio) * U300_GPIO_PORTX_SPACING);
- }
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(gpio_set_value);
-
-int gpio_direction_input(unsigned gpio)
-{
- unsigned long flags;
- u32 val;
-
- if (gpio > U300_GPIO_MAX)
- return -EINVAL;
-
- local_irq_save(flags);
- val = readl(virtbase + U300_GPIO_PXPCR + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- /* Mask out this pin*/
- val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((gpio & 0x07) << 1));
- /* This is not needed since it sets the bits to zero.*/
- /* val |= (U300_GPIO_PXPCR_PIN_MODE_INPUT << (gpio*2)); */
- writel(val, virtbase + U300_GPIO_PXPCR + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- local_irq_restore(flags);
- return 0;
-}
-EXPORT_SYMBOL(gpio_direction_input);
-
-int gpio_direction_output(unsigned gpio, int value)
-{
- unsigned long flags;
- u32 val;
-
- if (gpio > U300_GPIO_MAX)
- return -EINVAL;
-
- local_irq_save(flags);
- val = readl(virtbase + U300_GPIO_PXPCR + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- /* Mask out this pin */
- val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((gpio & 0x07) << 1));
- /*
- * FIXME: configure for push/pull, open drain or open source per pin
- * in setup. The current driver will only support push/pull.
- */
- val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL
- << ((gpio & 0x07) << 1));
- writel(val, virtbase + U300_GPIO_PXPCR + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- gpio_set_value(gpio, value);
- local_irq_restore(flags);
- return 0;
-}
-EXPORT_SYMBOL(gpio_direction_output);
-
-/*
- * Enable an IRQ, edge is rising edge (!= 0) or falling edge (==0).
- */
-void enable_irq_on_gpio_pin(unsigned gpio, int edge)
-{
- u32 val;
- unsigned long flags;
- local_irq_save(flags);
-
- val = readl(virtbase + U300_GPIO_PXIEN + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- val |= (1 << (gpio & 0x07));
- writel(val, virtbase + U300_GPIO_PXIEN + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- val = readl(virtbase + U300_GPIO_PXICR + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- if (edge)
- val |= (1 << (gpio & 0x07));
- else
- val &= ~(1 << (gpio & 0x07));
- writel(val, virtbase + U300_GPIO_PXICR + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(enable_irq_on_gpio_pin);
-
-void disable_irq_on_gpio_pin(unsigned gpio)
-{
- u32 val;
- unsigned long flags;
-
- local_irq_save(flags);
- val = readl(virtbase + U300_GPIO_PXIEN + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- val &= ~(1 << (gpio & 0x07));
- writel(val, virtbase + U300_GPIO_PXIEN + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(disable_irq_on_gpio_pin);
-
-/* Enable (value == 0) or disable (value == 1) internal pullup */
-void gpio_pullup(unsigned gpio, int value)
-{
- u32 val;
- unsigned long flags;
-
- local_irq_save(flags);
- if (value) {
- val = readl(virtbase + U300_GPIO_PXPER + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- writel(val | (1 << (gpio & 0x07)), virtbase + U300_GPIO_PXPER +
- PIN_TO_PORT(gpio) * U300_GPIO_PORTX_SPACING);
- } else {
- val = readl(virtbase + U300_GPIO_PXPER + PIN_TO_PORT(gpio) *
- U300_GPIO_PORTX_SPACING);
- writel(val & ~(1 << (gpio & 0x07)), virtbase + U300_GPIO_PXPER +
- PIN_TO_PORT(gpio) * U300_GPIO_PORTX_SPACING);
- }
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(gpio_pullup);
-
-static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
-{
- struct u300_gpio_port *port = dev_id;
- u32 val;
- int pin;
-
- /* Read event register */
- val = readl(virtbase + U300_GPIO_PXIEV + port->number *
- U300_GPIO_PORTX_SPACING);
- /* Mask with enable register */
- val &= readl(virtbase + U300_GPIO_PXIEV + port->number *
- U300_GPIO_PORTX_SPACING);
- /* Mask relevant bits */
- val &= U300_GPIO_PXIEV_ALL_IRQ_EVENT_MASK;
- /* ACK IRQ (clear event) */
- writel(val, virtbase + U300_GPIO_PXIEV + port->number *
- U300_GPIO_PORTX_SPACING);
- /* Print message */
- while (val != 0) {
- unsigned gpio;
-
- pin = __ffs(val);
- /* mask off this pin */
- val &= ~(1 << pin);
- gpio = (port->number << 3) + pin;
-
- if (gpio_pin[gpio].callback)
- (void)gpio_pin[gpio].callback(gpio_pin[gpio].data);
- else
- dev_dbg(gpiodev, "stray GPIO IRQ on line %d\n",
- gpio);
- }
- return IRQ_HANDLED;
-}
-
-static void gpio_set_initial_values(void)
-{
-#ifdef U300_COH901571_3
- int i, j;
- unsigned long flags;
- u32 val;
-
- /* Write default values to all pins */
- for (i = 0; i < U300_GPIO_NUM_PORTS; i++) {
- val = 0;
- for (j = 0; j < 8; j++)
- val |= (u32) (u300_gpio_config[i][j].default_output_value != DEFAULT_OUTPUT_LOW) << j;
- local_irq_save(flags);
- writel(val, virtbase + U300_GPIO_PXPDOR + i * U300_GPIO_PORTX_SPACING);
- local_irq_restore(flags);
- }
-
- /*
- * Put all pins that are set to either 'GPIO_OUT' or 'GPIO_NOT_USED'
- * to output and 'GPIO_IN' to input for each port. And initialize
- * default value on outputs.
- */
- for (i = 0; i < U300_GPIO_NUM_PORTS; i++) {
- for (j = 0; j < U300_GPIO_PINS_PER_PORT; j++) {
- local_irq_save(flags);
- val = readl(virtbase + U300_GPIO_PXPCR +
- i * U300_GPIO_PORTX_SPACING);
- /* Mask out this pin */
- val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << (j << 1));
-
- if (u300_gpio_config[i][j].pin_usage != GPIO_IN)
- val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL << (j << 1));
- writel(val, virtbase + U300_GPIO_PXPCR +
- i * U300_GPIO_PORTX_SPACING);
- local_irq_restore(flags);
- }
- }
-
- /* Enable or disable the internal pull-ups in the GPIO ASIC block */
- for (i = 0; i < U300_GPIO_MAX; i++) {
- val = 0;
- for (j = 0; j < 8; j++)
- val |= (u32)((u300_gpio_config[i][j].pull_up == DISABLE_PULL_UP) << j);
- local_irq_save(flags);
- writel(val, virtbase + U300_GPIO_PXPER + i * U300_GPIO_PORTX_SPACING);
- local_irq_restore(flags);
- }
-#endif
-}
-
-static int __init gpio_probe(struct platform_device *pdev)
-{
- u32 val;
- int err = 0;
- int i;
- int num_irqs;
-
- gpiodev = &pdev->dev;
- memset(gpio_pin, 0, sizeof(gpio_pin));
-
- /* Get GPIO clock */
- clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(clk)) {
- err = PTR_ERR(clk);
- dev_err(gpiodev, "could not get GPIO clock\n");
- goto err_no_clk;
- }
- err = clk_enable(clk);
- if (err) {
- dev_err(gpiodev, "could not enable GPIO clock\n");
- goto err_no_clk_enable;
- }
-
- memres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!memres)
- goto err_no_resource;
-
- if (request_mem_region(memres->start, memres->end - memres->start, "GPIO Controller")
- == NULL) {
- err = -ENODEV;
- goto err_no_ioregion;
- }
-
- virtbase = ioremap(memres->start, resource_size(memres));
- if (!virtbase) {
- err = -ENOMEM;
- goto err_no_ioremap;
- }
- dev_info(gpiodev, "remapped 0x%08x to %p\n",
- memres->start, virtbase);
-
-#ifdef U300_COH901335
- dev_info(gpiodev, "initializing GPIO Controller COH 901 335\n");
- /* Turn on the GPIO block */
- writel(U300_GPIO_CR_BLOCK_CLOCK_ENABLE, virtbase + U300_GPIO_CR);
-#endif
-
-#ifdef U300_COH901571_3
- dev_info(gpiodev, "initializing GPIO Controller COH 901 571/3\n");
- val = readl(virtbase + U300_GPIO_CR);
- dev_info(gpiodev, "COH901571/3 block version: %d, " \
- "number of cores: %d\n",
- ((val & 0x0000FE00) >> 9),
- ((val & 0x000001FC) >> 2));
- writel(U300_GPIO_CR_BLOCK_CLKRQ_ENABLE, virtbase + U300_GPIO_CR);
-#endif
-
- gpio_set_initial_values();
-
- for (num_irqs = 0 ; num_irqs < U300_GPIO_NUM_PORTS; num_irqs++) {
-
- gpio_ports[num_irqs].irq =
- platform_get_irq_byname(pdev,
- gpio_ports[num_irqs].name);
-
- err = request_irq(gpio_ports[num_irqs].irq,
- gpio_irq_handler, IRQF_DISABLED,
- gpio_ports[num_irqs].name,
- &gpio_ports[num_irqs]);
- if (err) {
- dev_err(gpiodev, "cannot allocate IRQ for %s!\n",
- gpio_ports[num_irqs].name);
- goto err_no_irq;
- }
- /* Turns off PortX_irq_force */
- writel(0x0, virtbase + U300_GPIO_PXIFR +
- num_irqs * U300_GPIO_PORTX_SPACING);
- }
-
- return 0;
-
- err_no_irq:
- for (i = 0; i < num_irqs; i++)
- free_irq(gpio_ports[i].irq, &gpio_ports[i]);
- iounmap(virtbase);
- err_no_ioremap:
- release_mem_region(memres->start, memres->end - memres->start);
- err_no_ioregion:
- err_no_resource:
- clk_disable(clk);
- err_no_clk_enable:
- clk_put(clk);
- err_no_clk:
- dev_info(gpiodev, "module ERROR:%d\n", err);
- return err;
-}
-
-static int __exit gpio_remove(struct platform_device *pdev)
-{
- int i;
-
- /* Turn off the GPIO block */
- writel(0x00000000U, virtbase + U300_GPIO_CR);
- for (i = 0 ; i < U300_GPIO_NUM_PORTS; i++)
- free_irq(gpio_ports[i].irq, &gpio_ports[i]);
- iounmap(virtbase);
- release_mem_region(memres->start, memres->end - memres->start);
- clk_disable(clk);
- clk_put(clk);
- return 0;
-}
-
-static struct platform_driver gpio_driver = {
- .driver = {
- .name = "u300-gpio",
- },
- .remove = __exit_p(gpio_remove),
-};
-
-
-static int __init u300_gpio_init(void)
-{
- return platform_driver_probe(&gpio_driver, gpio_probe);
-}
-
-static void __exit u300_gpio_exit(void)
-{
- platform_driver_unregister(&gpio_driver);
-}
-
-arch_initcall(u300_gpio_init);
-module_exit(u300_gpio_exit);
-
-MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
-
-#ifdef U300_COH901571_3
-MODULE_DESCRIPTION("ST-Ericsson AB COH 901 571/3 GPIO driver");
-#endif
-
-#ifdef U300_COH901335
-MODULE_DESCRIPTION("ST-Ericsson AB COH 901 335 GPIO driver");
-#endif
-
-MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud