diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/gpio-u300.c | 917 |
3 files changed, 0 insertions, 927 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index e3380137b05..573532f7553 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -176,15 +176,6 @@ config GPIO_SCH The Intel Tunnel Creek processor has 5 GPIOs powered by the core power rail and 9 from suspend power supply. -config GPIO_U300 - bool "ST-Ericsson U300 COH 901 335/571 GPIO" - depends on GPIOLIB && ARCH_U300 - help - Say yes here to support GPIO interface on ST-Ericsson U300. - The names of the two IP block variants supported are - COH 901 335 and COH 901 571/3. They contain 3, 5 or 7 - ports of 8 GPIO pins each. - config GPIO_VX855 tristate "VIA VX855/VX875 GPIO" depends on PCI diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 8ef9e9abe97..62e641e79e8 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -54,7 +54,6 @@ obj-$(CONFIG_ARCH_DAVINCI_TNETV107X) += gpio-tnetv107x.o obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o -obj-$(CONFIG_MACH_U300) += gpio-u300.o obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o obj-$(CONFIG_GPIO_VR41XX) += gpio-vr41xx.o obj-$(CONFIG_GPIO_VX855) += gpio-vx855.o diff --git a/drivers/gpio/gpio-u300.c b/drivers/gpio/gpio-u300.c deleted file mode 100644 index 4035778852b..00000000000 --- a/drivers/gpio/gpio-u300.c +++ /dev/null @@ -1,917 +0,0 @@ -/* - * U300 GPIO module. - * - * Copyright (C) 2007-2011 ST-Ericsson AB - * License terms: GNU General Public License (GPL) version 2 - * 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) - * Author: Linus Walleij <linus.walleij@linaro.org> - * Author: Jonas Aaberg <jonas.aberg@stericsson.com> - */ -#include <linux/module.h> -#include <linux/irq.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> -#include <linux/list.h> -#include <linux/slab.h> -#include <mach/gpio-u300.h> - -/* - * Bias modes for U300 GPIOs - * - * GPIO_U300_CONFIG_BIAS_UNKNOWN: this bias mode is not known to us - * GPIO_U300_CONFIG_BIAS_FLOAT: no specific bias, the GPIO will float or state - * is not controlled by software - * GPIO_U300_CONFIG_BIAS_PULL_UP: the GPIO will be pulled up (usually with high - * impedance to VDD) - */ -#define GPIO_U300_CONFIG_BIAS_UNKNOWN 0x1000 -#define GPIO_U300_CONFIG_BIAS_FLOAT 0x1001 -#define GPIO_U300_CONFIG_BIAS_PULL_UP 0x1002 - -/* - * Drive modes for U300 GPIOs (output) - * - * GPIO_U300_CONFIG_DRIVE_PUSH_PULL: the GPIO will be driven actively high and - * low, this is the most typical case and is typically achieved with two - * active transistors on the output - * GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN: the GPIO will be driven with open drain - * (open collector) which means it is usually wired with other output - * ports which are then pulled up with an external resistor - * GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE: the GPIO will be driven with open drain - * (open emitter) which is the same as open drain mutatis mutandis but - * pulled to ground - */ -#define GPIO_U300_CONFIG_DRIVE_PUSH_PULL 0x2000 -#define GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN 0x2001 -#define GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE 0x2002 - -/* - * Register definitions for COH 901 335 variant - */ -#define U300_335_PORT_STRIDE (0x1C) -/* Port X Pin Data Register 32bit, this is both input and output (R/W) */ -#define U300_335_PXPDIR (0x00) -#define U300_335_PXPDOR (0x00) -/* Port X Pin Config Register 32bit (R/W) */ -#define U300_335_PXPCR (0x04) -/* This register layout is the same in both blocks */ -#define U300_GPIO_PXPCR_ALL_PINS_MODE_MASK (0x0000FFFFUL) -#define U300_GPIO_PXPCR_PIN_MODE_MASK (0x00000003UL) -#define U300_GPIO_PXPCR_PIN_MODE_SHIFT (0x00000002UL) -#define U300_GPIO_PXPCR_PIN_MODE_INPUT (0x00000000UL) -#define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL (0x00000001UL) -#define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_DRAIN (0x00000002UL) -#define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_SOURCE (0x00000003UL) -/* Port X Interrupt Event Register 32bit (R/W) */ -#define U300_335_PXIEV (0x08) -/* Port X Interrupt Enable Register 32bit (R/W) */ -#define U300_335_PXIEN (0x0C) -/* Port X Interrupt Force Register 32bit (R/W) */ -#define U300_335_PXIFR (0x10) -/* Port X Interrupt Config Register 32bit (R/W) */ -#define U300_335_PXICR (0x14) -/* This register layout is the same in both blocks */ -#define U300_GPIO_PXICR_ALL_IRQ_CONFIG_MASK (0x000000FFUL) -#define U300_GPIO_PXICR_IRQ_CONFIG_MASK (0x00000001UL) -#define U300_GPIO_PXICR_IRQ_CONFIG_FALLING_EDGE (0x00000000UL) -#define U300_GPIO_PXICR_IRQ_CONFIG_RISING_EDGE (0x00000001UL) -/* Port X Pull-up Enable Register 32bit (R/W) */ -#define U300_335_PXPER (0x18) -/* This register layout is the same in both blocks */ -#define U300_GPIO_PXPER_ALL_PULL_UP_DISABLE_MASK (0x000000FFUL) -#define U300_GPIO_PXPER_PULL_UP_DISABLE (0x00000001UL) -/* Control Register 32bit (R/W) */ -#define U300_335_CR (0x54) -#define U300_335_CR_BLOCK_CLOCK_ENABLE (0x00000001UL) - -/* - * Register definitions for COH 901 571 / 3 variant - */ -#define U300_571_PORT_STRIDE (0x30) -/* - * Control Register 32bit (R/W) - * bit 15-9 (mask 0x0000FE00) contains the number of cores. 8*cores - * gives the number of GPIO pins. - * bit 8-2 (mask 0x000001FC) contains the core version ID. - */ -#define U300_571_CR (0x00) -#define U300_571_CR_SYNC_SEL_ENABLE (0x00000002UL) -#define U300_571_CR_BLOCK_CLKRQ_ENABLE (0x00000001UL) -/* - * These registers have the same layout and function as the corresponding - * COH 901 335 registers, just at different offset. - */ -#define U300_571_PXPDIR (0x04) -#define U300_571_PXPDOR (0x08) -#define U300_571_PXPCR (0x0C) -#define U300_571_PXPER (0x10) -#define U300_571_PXIEV (0x14) -#define U300_571_PXIEN (0x18) -#define U300_571_PXIFR (0x1C) -#define U300_571_PXICR (0x20) - -/* 8 bits per port, no version has more than 7 ports */ -#define U300_GPIO_PINS_PER_PORT 8 -#define U300_GPIO_MAX (U300_GPIO_PINS_PER_PORT * 7) - -struct u300_gpio { - struct gpio_chip chip; - struct list_head port_list; - struct clk *clk; - struct resource *memres; - void __iomem *base; - struct device *dev; - int irq_base; - u32 stride; - /* Register offsets */ - u32 pcr; - u32 dor; - u32 dir; - u32 per; - u32 icr; - u32 ien; - u32 iev; -}; - -struct u300_gpio_port { - struct list_head node; - struct u300_gpio *gpio; - char name[8]; - int irq; - int number; - u8 toggle_edge_mode; -}; - -/* - * Macro to expand to read a specific register found in the "gpio" - * struct. It requires the struct u300_gpio *gpio variable to exist in - * its context. It calculates the port offset from the given pin - * offset, muliplies by the port stride and adds the register offset - * so it provides a pointer to the desired register. - */ -#define U300_PIN_REG(pin, reg) \ - (gpio->base + (pin >> 3) * gpio->stride + gpio->reg) - -/* - * Provides a bitmask for a specific gpio pin inside an 8-bit GPIO - * register. - */ -#define U300_PIN_BIT(pin) \ - (1 << (pin & 0x07)) - -struct u300_gpio_confdata { - u16 bias_mode; - bool output; - int outval; -}; - -/* BS335 has seven ports of 8 bits each = GPIO pins 0..55 */ -#define BS335_GPIO_NUM_PORTS 7 -/* BS365 has five ports of 8 bits each = GPIO pins 0..39 */ -#define BS365_GPIO_NUM_PORTS 5 - -#define U300_FLOATING_INPUT { \ - .bias_mode = GPIO_U300_CONFIG_BIAS_FLOAT, \ - .output = false, \ -} - -#define U300_PULL_UP_INPUT { \ - .bias_mode = GPIO_U300_CONFIG_BIAS_PULL_UP, \ - .output = false, \ -} - -#define U300_OUTPUT_LOW { \ - .output = true, \ - .outval = 0, \ -} - -#define U300_OUTPUT_HIGH { \ - .output = true, \ - .outval = 1, \ -} - - -/* Initial configuration */ -static const struct __initdata u300_gpio_confdata -bs335_gpio_config[BS335_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = { - /* Port 0, pins 0-7 */ - { - U300_FLOATING_INPUT, - U300_OUTPUT_HIGH, - U300_FLOATING_INPUT, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - }, - /* Port 1, pins 0-7 */ - { - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_PULL_UP_INPUT, - U300_FLOATING_INPUT, - U300_OUTPUT_HIGH, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - }, - /* Port 2, pins 0-7 */ - { - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_OUTPUT_LOW, - U300_PULL_UP_INPUT, - U300_OUTPUT_LOW, - U300_PULL_UP_INPUT, - }, - /* Port 3, pins 0-7 */ - { - U300_PULL_UP_INPUT, - U300_OUTPUT_LOW, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - }, - /* Port 4, pins 0-7 */ - { - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - }, - /* Port 5, pins 0-7 */ - { - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - }, - /* Port 6, pind 0-7 */ - { - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - } -}; - -static const struct __initdata u300_gpio_confdata -bs365_gpio_config[BS365_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = { - /* Port 0, pins 0-7 */ - { - U300_FLOATING_INPUT, - U300_OUTPUT_LOW, - U300_FLOATING_INPUT, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_PULL_UP_INPUT, - U300_FLOATING_INPUT, - }, - /* Port 1, pins 0-7 */ - { - U300_OUTPUT_LOW, - U300_FLOATING_INPUT, - U300_OUTPUT_LOW, - U300_FLOATING_INPUT, - U300_FLOATING_INPUT, - U300_OUTPUT_HIGH, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - }, - /* Port 2, pins 0-7 */ - { - U300_FLOATING_INPUT, - U300_PULL_UP_INPUT, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - }, - /* Port 3, pins 0-7 */ - { - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - }, - /* Port 4, pins 0-7 */ - { - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - U300_PULL_UP_INPUT, - /* These 4 pins doesn't exist on DB3210 */ - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - U300_OUTPUT_LOW, - } -}; - -/** - * to_u300_gpio() - get the pointer to u300_gpio - * @chip: the gpio chip member of the structure u300_gpio - */ -static inline struct u300_gpio *to_u300_gpio(struct gpio_chip *chip) -{ - return container_of(chip, struct u300_gpio, chip); -} - -static int u300_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct u300_gpio *gpio = to_u300_gpio(chip); - - return readl(U300_PIN_REG(offset, dir)) & U300_PIN_BIT(offset); -} - -static void u300_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - struct u300_gpio *gpio = to_u300_gpio(chip); - unsigned long flags; - u32 val; - - local_irq_save(flags); - - val = readl(U300_PIN_REG(offset, dor)); - if (value) - writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, dor)); - else - writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, dor)); - - local_irq_restore(flags); -} - -static int u300_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - struct u300_gpio *gpio = to_u300_gpio(chip); - unsigned long flags; - u32 val; - - local_irq_save(flags); - val = readl(U300_PIN_REG(offset, pcr)); - /* Mask out this pin, note 2 bits per setting */ - val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1)); - writel(val, U300_PIN_REG(offset, pcr)); - local_irq_restore(flags); - return 0; -} - -static int u300_gpio_direction_output(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct u300_gpio *gpio = to_u300_gpio(chip); - unsigned long flags; - u32 oldmode; - u32 val; - - local_irq_save(flags); - val = readl(U300_PIN_REG(offset, pcr)); - /* - * Drive mode must be set by the special mode set function, set - * push/pull mode by default if no mode has been selected. - */ - oldmode = val & (U300_GPIO_PXPCR_PIN_MODE_MASK << - ((offset & 0x07) << 1)); - /* mode = 0 means input, else some mode is already set */ - if (oldmode == 0) { - val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << - ((offset & 0x07) << 1)); - val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL - << ((offset & 0x07) << 1)); - writel(val, U300_PIN_REG(offset, pcr)); - } - u300_gpio_set(chip, offset, value); - local_irq_restore(flags); - return 0; -} - -static int u300_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct u300_gpio *gpio = to_u300_gpio(chip); - int retirq = gpio->irq_base + offset; - - dev_dbg(gpio->dev, "request IRQ for GPIO %d, return %d\n", offset, - retirq); - return retirq; -} - -static int u300_gpio_config(struct gpio_chip *chip, unsigned offset, - u16 param, unsigned long *data) -{ - struct u300_gpio *gpio = to_u300_gpio(chip); - unsigned long flags; - u32 val; - - local_irq_save(flags); - switch (param) { - case GPIO_U300_CONFIG_BIAS_UNKNOWN: - case GPIO_U300_CONFIG_BIAS_FLOAT: - val = readl(U300_PIN_REG(offset, per)); - writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, per)); - break; - case GPIO_U300_CONFIG_BIAS_PULL_UP: - val = readl(U300_PIN_REG(offset, per)); - writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, per)); - break; - case GPIO_U300_CONFIG_DRIVE_PUSH_PULL: - val = readl(U300_PIN_REG(offset, pcr)); - val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK - << ((offset & 0x07) << 1)); - val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL - << ((offset & 0x07) << 1)); - writel(val, U300_PIN_REG(offset, pcr)); - break; - case GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN: - val = readl(U300_PIN_REG(offset, pcr)); - val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK - << ((offset & 0x07) << 1)); - val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_DRAIN - << ((offset & 0x07) << 1)); - writel(val, U300_PIN_REG(offset, pcr)); - break; - case GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE: - val = readl(U300_PIN_REG(offset, pcr)); - val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK - << ((offset & 0x07) << 1)); - val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_SOURCE - << ((offset & 0x07) << 1)); - writel(val, U300_PIN_REG(offset, pcr)); - break; - default: - local_irq_restore(flags); - dev_err(gpio->dev, "illegal configuration requested\n"); - return -EINVAL; - } - local_irq_restore(flags); - return 0; -} - -static struct gpio_chip u300_gpio_chip = { - .label = "u300-gpio-chip", - .owner = THIS_MODULE, - .get = u300_gpio_get, - .set = u300_gpio_set, - .direction_input = u300_gpio_direction_input, - .direction_output = u300_gpio_direction_output, - .to_irq = u300_gpio_to_irq, -}; - -static void u300_toggle_trigger(struct u300_gpio *gpio, unsigned offset) -{ - u32 val; - - val = readl(U300_PIN_REG(offset, icr)); - /* Set mode depending on state */ - if (u300_gpio_get(&gpio->chip, offset)) { - /* High now, let's trigger on falling edge next then */ - writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); - dev_dbg(gpio->dev, "next IRQ on falling edge on pin %d\n", - offset); - } else { - /* Low now, let's trigger on rising edge next then */ - writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); - dev_dbg(gpio->dev, "next IRQ on rising edge on pin %d\n", - offset); - } -} - -static int u300_gpio_irq_type(struct irq_data *d, unsigned trigger) -{ - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - int offset = d->irq - gpio->irq_base; - u32 val; - - if ((trigger & IRQF_TRIGGER_RISING) && - (trigger & IRQF_TRIGGER_FALLING)) { - /* - * The GPIO block can only trigger on falling OR rising edges, - * not both. So we need to toggle the mode whenever the pin - * goes from one state to the other with a special state flag - */ - dev_dbg(gpio->dev, - "trigger on both rising and falling edge on pin %d\n", - offset); - port->toggle_edge_mode |= U300_PIN_BIT(offset); - u300_toggle_trigger(gpio, offset); - } else if (trigger & IRQF_TRIGGER_RISING) { - dev_dbg(gpio->dev, "trigger on rising edge on pin %d\n", - offset); - val = readl(U300_PIN_REG(offset, icr)); - writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); - port->toggle_edge_mode &= ~U300_PIN_BIT(offset); - } else if (trigger & IRQF_TRIGGER_FALLING) { - dev_dbg(gpio->dev, "trigger on falling edge on pin %d\n", - offset); - val = readl(U300_PIN_REG(offset, icr)); - writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); - port->toggle_edge_mode &= ~U300_PIN_BIT(offset); - } - - return 0; -} - -static void u300_gpio_irq_enable(struct irq_data *d) -{ - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - int offset = d->irq - gpio->irq_base; - u32 val; - unsigned long flags; - - local_irq_save(flags); - val = readl(U300_PIN_REG(offset, ien)); - writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, ien)); - local_irq_restore(flags); -} - -static void u300_gpio_irq_disable(struct irq_data *d) -{ - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - int offset = d->irq - gpio->irq_base; - u32 val; - unsigned long flags; - - local_irq_save(flags); - val = readl(U300_PIN_REG(offset, ien)); - writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, ien)); - local_irq_restore(flags); -} - -static struct irq_chip u300_gpio_irqchip = { - .name = "u300-gpio-irqchip", - .irq_enable = u300_gpio_irq_enable, - .irq_disable = u300_gpio_irq_disable, - .irq_set_type = u300_gpio_irq_type, - -}; - -static void u300_gpio_irq_handler(unsigned irq, struct irq_desc *desc) -{ - struct u300_gpio_port *port = irq_get_handler_data(irq); - struct u300_gpio *gpio = port->gpio; - int pinoffset = port->number << 3; /* get the right stride */ - unsigned long val; - - desc->irq_data.chip->irq_ack(&desc->irq_data); - /* Read event register */ - val = readl(U300_PIN_REG(pinoffset, iev)); - /* Mask relevant bits */ - val &= 0xFFU; /* 8 bits per port */ - /* ACK IRQ (clear event) */ - writel(val, U300_PIN_REG(pinoffset, iev)); - - /* Call IRQ handler */ - if (val != 0) { - int irqoffset; - - for_each_set_bit(irqoffset, &val, U300_GPIO_PINS_PER_PORT) { - int pin_irq = gpio->irq_base + (port->number << 3) - + irqoffset; - int offset = pinoffset + irqoffset; - - dev_dbg(gpio->dev, "GPIO IRQ %d on pin %d\n", - pin_irq, offset); - generic_handle_irq(pin_irq); - /* - * Triggering IRQ on both rising and falling edge - * needs mockery - */ - if (port->toggle_edge_mode & U300_PIN_BIT(offset)) - u300_toggle_trigger(gpio, offset); - } - } - - desc->irq_data.chip->irq_unmask(&desc->irq_data); -} - -static void __init u300_gpio_init_pin(struct u300_gpio *gpio, - int offset, - const struct u300_gpio_confdata *conf) -{ - /* Set mode: input or output */ - if (conf->output) { - u300_gpio_direction_output(&gpio->chip, offset, conf->outval); - - /* Deactivate bias mode for output */ - u300_gpio_config(&gpio->chip, offset, - GPIO_U300_CONFIG_BIAS_FLOAT, - NULL); - - /* Set drive mode for output */ - u300_gpio_config(&gpio->chip, offset, - GPIO_U300_CONFIG_DRIVE_PUSH_PULL, NULL); - - dev_dbg(gpio->dev, "set up pin %d as output, value: %d\n", - offset, conf->outval); - } else { - u300_gpio_direction_input(&gpio->chip, offset); - - /* Always set output low on input pins */ - u300_gpio_set(&gpio->chip, offset, 0); - - /* Set bias mode for input */ - u300_gpio_config(&gpio->chip, offset, conf->bias_mode, NULL); - - dev_dbg(gpio->dev, "set up pin %d as input, bias: %04x\n", - offset, conf->bias_mode); - } -} - -static void __init u300_gpio_init_coh901571(struct u300_gpio *gpio, - struct u300_gpio_platform *plat) -{ - int i, j; - - /* Write default config and values to all pins */ - for (i = 0; i < plat->ports; i++) { - for (j = 0; j < 8; j++) { - const struct u300_gpio_confdata *conf; - int offset = (i*8) + j; - - if (plat->variant == U300_GPIO_COH901571_3_BS335) - conf = &bs335_gpio_config[i][j]; - else if (plat->variant == U300_GPIO_COH901571_3_BS365) - conf = &bs365_gpio_config[i][j]; - else - break; - - u300_gpio_init_pin(gpio, offset, conf); - } - } -} - -static inline void u300_gpio_free_ports(struct u300_gpio *gpio) -{ - struct u300_gpio_port *port; - struct list_head *p, *n; - - list_for_each_safe(p, n, &gpio->port_list) { - port = list_entry(p, struct u300_gpio_port, node); - list_del(&port->node); - free_irq(port->irq, port); - kfree(port); - } -} - -static int __init u300_gpio_probe(struct platform_device *pdev) -{ - struct u300_gpio_platform *plat = dev_get_platdata(&pdev->dev); - struct u300_gpio *gpio; - int err = 0; - int portno; - u32 val; - u32 ifr; - int i; - - gpio = kzalloc(sizeof(struct u300_gpio), GFP_KERNEL); - if (gpio == NULL) { - dev_err(&pdev->dev, "failed to allocate memory\n"); - return -ENOMEM; - } - - gpio->chip = u300_gpio_chip; - gpio->chip.ngpio = plat->ports * U300_GPIO_PINS_PER_PORT; - gpio->irq_base = plat->gpio_irq_base; - gpio->chip.dev = &pdev->dev; - gpio->chip.base = plat->gpio_base; - gpio->dev = &pdev->dev; - - /* Get GPIO clock */ - gpio->clk = clk_get(gpio->dev, NULL); - if (IS_ERR(gpio->clk)) { - err = PTR_ERR(gpio->clk); - dev_err(gpio->dev, "could not get GPIO clock\n"); - goto err_no_clk; - } - err = clk_enable(gpio->clk); - if (err) { - dev_err(gpio->dev, "could not enable GPIO clock\n"); - goto err_no_clk_enable; - } - - gpio->memres = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!gpio->memres) { - dev_err(gpio->dev, "could not get GPIO memory resource\n"); - err = -ENODEV; - goto err_no_resource; - } - - if (!request_mem_region(gpio->memres->start, - resource_size(gpio->memres), - "GPIO Controller")) { - err = -ENODEV; - goto err_no_ioregion; - } - - gpio->base = ioremap(gpio->memres->start, resource_size(gpio->memres)); - if (!gpio->base) { - err = -ENOMEM; - goto err_no_ioremap; - } - - if (plat->variant == U300_GPIO_COH901335) { - dev_info(gpio->dev, - "initializing GPIO Controller COH 901 335\n"); - gpio->stride = U300_335_PORT_STRIDE; - gpio->pcr = U300_335_PXPCR; - gpio->dor = U300_335_PXPDOR; - gpio->dir = U300_335_PXPDIR; - gpio->per = U300_335_PXPER; - gpio->icr = U300_335_PXICR; - gpio->ien = U300_335_PXIEN; - gpio->iev = U300_335_PXIEV; - ifr = U300_335_PXIFR; - - /* Turn on the GPIO block */ - writel(U300_335_CR_BLOCK_CLOCK_ENABLE, - gpio->base + U300_335_CR); - } else if (plat->variant == U300_GPIO_COH901571_3_BS335 || - plat->variant == U300_GPIO_COH901571_3_BS365) { - dev_info(gpio->dev, - "initializing GPIO Controller COH 901 571/3\n"); - gpio->stride = U300_571_PORT_STRIDE; - gpio->pcr = U300_571_PXPCR; - gpio->dor = U300_571_PXPDOR; - gpio->dir = U300_571_PXPDIR; - gpio->per = U300_571_PXPER; - gpio->icr = U300_571_PXICR; - gpio->ien = U300_571_PXIEN; - gpio->iev = U300_571_PXIEV; - ifr = U300_571_PXIFR; - - val = readl(gpio->base + U300_571_CR); - dev_info(gpio->dev, "COH901571/3 block version: %d, " \ - "number of cores: %d totalling %d pins\n", - ((val & 0x000001FC) >> 2), - ((val & 0x0000FE00) >> 9), - ((val & 0x0000FE00) >> 9) * 8); - writel(U300_571_CR_BLOCK_CLKRQ_ENABLE, - gpio->base + U300_571_CR); - u300_gpio_init_coh901571(gpio, plat); - } else { - dev_err(gpio->dev, "unknown block variant\n"); - err = -ENODEV; - goto err_unknown_variant; - } - - /* Add each port with its IRQ separately */ - INIT_LIST_HEAD(&gpio->port_list); - for (portno = 0 ; portno < plat->ports; portno++) { - struct u300_gpio_port *port = - kmalloc(sizeof(struct u300_gpio_port), GFP_KERNEL); - - if (!port) { - dev_err(gpio->dev, "out of memory\n"); - err = -ENOMEM; - goto err_no_port; - } - - snprintf(port->name, 8, "gpio%d", portno); - port->number = portno; - port->gpio = gpio; - - port->irq = platform_get_irq_byname(pdev, - port->name); - - dev_dbg(gpio->dev, "register IRQ %d for %s\n", port->irq, - port->name); - - irq_set_chained_handler(port->irq, u300_gpio_irq_handler); - irq_set_handler_data(port->irq, port); - - /* For each GPIO pin set the unique IRQ handler */ - for (i = 0; i < U300_GPIO_PINS_PER_PORT; i++) { - int irqno = gpio->irq_base + (portno << 3) + i; - - dev_dbg(gpio->dev, "handler for IRQ %d on %s\n", - irqno, port->name); - irq_set_chip_and_handler(irqno, &u300_gpio_irqchip, - handle_simple_irq); - set_irq_flags(irqno, IRQF_VALID); - irq_set_chip_data(irqno, port); - } - - /* Turns off irq force (test register) for this port */ - writel(0x0, gpio->base + portno * gpio->stride + ifr); - - list_add_tail(&port->node, &gpio->port_list); - } - dev_dbg(gpio->dev, "initialized %d GPIO ports\n", portno); - - err = gpiochip_add(&gpio->chip); - if (err) { - dev_err(gpio->dev, "unable to add gpiochip: %d\n", err); - goto err_no_chip; - } - - platform_set_drvdata(pdev, gpio); - - return 0; - -err_no_chip: -err_no_port: - u300_gpio_free_ports(gpio); -err_unknown_variant: - iounmap(gpio->base); -err_no_ioremap: - release_mem_region(gpio->memres->start, resource_size(gpio->memres)); -err_no_ioregion: -err_no_resource: - clk_disable(gpio->clk); -err_no_clk_enable: - clk_put(gpio->clk); -err_no_clk: - kfree(gpio); - dev_info(&pdev->dev, "module ERROR:%d\n", err); - return err; -} - -static int __exit u300_gpio_remove(struct platform_device *pdev) -{ - struct u300_gpio_platform *plat = dev_get_platdata(&pdev->dev); - struct u300_gpio *gpio = platform_get_drvdata(pdev); - int err; - - /* Turn off the GPIO block */ - if (plat->variant == U300_GPIO_COH901335) - writel(0x00000000U, gpio->base + U300_335_CR); - if (plat->variant == U300_GPIO_COH901571_3_BS335 || - plat->variant == U300_GPIO_COH901571_3_BS365) - writel(0x00000000U, gpio->base + U300_571_CR); - - err = gpiochip_remove(&gpio->chip); - if (err < 0) { - dev_err(gpio->dev, "unable to remove gpiochip: %d\n", err); - return err; - } - u300_gpio_free_ports(gpio); - iounmap(gpio->base); - release_mem_region(gpio->memres->start, - resource_size(gpio->memres)); - clk_disable(gpio->clk); - clk_put(gpio->clk); - platform_set_drvdata(pdev, NULL); - kfree(gpio); - return 0; -} - -static struct platform_driver u300_gpio_driver = { - .driver = { - .name = "u300-gpio", - }, - .remove = __exit_p(u300_gpio_remove), -}; - - -static int __init u300_gpio_init(void) -{ - return platform_driver_probe(&u300_gpio_driver, u300_gpio_probe); -} - -static void __exit u300_gpio_exit(void) -{ - platform_driver_unregister(&u300_gpio_driver); -} - -arch_initcall(u300_gpio_init); -module_exit(u300_gpio_exit); - -MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>"); -MODULE_DESCRIPTION("ST-Ericsson AB COH 901 335/COH 901 571/3 GPIO driver"); -MODULE_LICENSE("GPL"); |