diff options
Diffstat (limited to 'target/linux/lantiq/files/arch/mips/lantiq/svip/gpio.c')
| -rw-r--r-- | target/linux/lantiq/files/arch/mips/lantiq/svip/gpio.c | 553 |
1 files changed, 0 insertions, 553 deletions
diff --git a/target/linux/lantiq/files/arch/mips/lantiq/svip/gpio.c b/target/linux/lantiq/files/arch/mips/lantiq/svip/gpio.c deleted file mode 100644 index 398339201e..0000000000 --- a/target/linux/lantiq/files/arch/mips/lantiq/svip/gpio.c +++ /dev/null @@ -1,553 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - * - * Copyright (C) 2010 John Crispin <blogic@openwrt.org> - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/gpio.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/proc_fs.h> -#include <linux/init.h> -#include <linux/ioctl.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/kobject.h> -#include <linux/workqueue.h> -#include <linux/skbuff.h> -#include <linux/netlink.h> -#include <linux/platform_device.h> -#include <net/sock.h> -#include <linux/uaccess.h> -#include <linux/version.h> -#include <linux/semaphore.h> - -#include <lantiq_soc.h> -#include <svip_mux.h> -#include <base_reg.h> -#include <port_reg.h> - -#define DRV_NAME "ifxmips_gpio" - -int gpio_to_irq(unsigned int gpio) -{ - return -EINVAL; -} -EXPORT_SYMBOL(gpio_to_irq); - -int irq_to_gpio(unsigned int gpio) -{ - return -EINVAL; -} -EXPORT_SYMBOL(irq_to_gpio); - -struct ltq_port_base { - struct svip_reg_port *base; - u32 pins; -}; - -/* Base addresses for ports */ -static const struct ltq_port_base ltq_port_base[] = { - { (struct svip_reg_port *)LTQ_PORT_P0_BASE, 20 }, - { (struct svip_reg_port *)LTQ_PORT_P1_BASE, 20 }, - { (struct svip_reg_port *)LTQ_PORT_P2_BASE, 19 }, - { (struct svip_reg_port *)LTQ_PORT_P3_BASE, 20 }, - { (struct svip_reg_port *)LTQ_PORT_P4_BASE, 24 } -}; - -#define MAX_PORTS ARRAY_SIZE(ltq_port_base) -#define PINS_PER_PORT(port) (ltq_port_base[port].pins) - -static inline -void ltq_port_set_exintcr0(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->exintcr0) | (1 << pin), - ltq_port_base[port].base->exintcr0); -} - -static inline -void ltq_port_clear_exintcr0(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->exintcr0) & ~(1 << pin), - ltq_port_base[port].base->exintcr0); -} - -static inline -void ltq_port_set_exintcr1(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->exintcr1) | (1 << pin), - ltq_port_base[port].base->exintcr1); -} - -static inline -void ltq_port_clear_exintcr1(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->exintcr1) & ~(1 << pin), - ltq_port_base[port].base->exintcr1); -} - -static inline -void ltq_port_set_irncfg(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->irncfg) | (1 << pin), - ltq_port_base[port].base->irncfg); -} - -static inline -void ltq_port_clear_irncfg(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->irncfg) & ~(1 << pin), - ltq_port_base[port].base->irncfg); -} - -static inline -void ltq_port_set_irnen(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(1 << pin, ltq_port_base[port].base->irnenset); -} - -static inline -void ltq_port_clear_irnen(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(1 << pin, ltq_port_base[port].base->irnenclr); -} - -static inline -void ltq_port_set_dir_out(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->dir) | (1 << pin), - ltq_port_base[port].base->dir); -} - -static inline -void ltq_port_set_dir_in(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->dir) & ~(1 << pin), - ltq_port_base[port].base->dir); -} - -static inline -void ltq_port_set_output(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->out) | (1 << pin), - ltq_port_base[port].base->out); -} - -static inline -void ltq_port_clear_output(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->out) & ~(1 << pin), - ltq_port_base[port].base->out); -} - -static inline -int ltq_port_get_input(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return -EINVAL; - - return (port_r32(ltq_port_base[port].base->in) & (1 << pin)) == 0; -} - -static inline -void ltq_port_set_puen(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->puen) | (1 << pin), - ltq_port_base[port].base->puen); -} - -static inline -void ltq_port_clear_puen(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->puen) & ~(1 << pin), - ltq_port_base[port].base->puen); -} - -static inline -void ltq_port_set_altsel0(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->altsel0) | (1 << pin), - ltq_port_base[port].base->altsel0); -} - -static inline -void ltq_port_clear_altsel0(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->altsel0) & ~(1 << pin), - ltq_port_base[port].base->altsel0); -} - -static inline -void ltq_port_set_altsel1(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->altsel1) | (1 << pin), - ltq_port_base[port].base->altsel1); -} - -static inline -void ltq_port_clear_altsel1(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return; - - port_w32(port_r32(ltq_port_base[port].base->altsel1) & ~(1 << pin), - ltq_port_base[port].base->altsel1); -} - -void ltq_gpio_configure(int port, int pin, bool dirin, bool puen, - bool altsel0, bool altsel1) -{ - if (dirin) - ltq_port_set_dir_in(port, pin); - else - ltq_port_set_dir_out(port, pin); - - if (puen) - ltq_port_set_puen(port, pin); - else - ltq_port_clear_puen(port, pin); - - if (altsel0) - ltq_port_set_altsel0(port, pin); - else - ltq_port_clear_altsel0(port, pin); - - if (altsel1) - ltq_port_set_altsel1(port, pin); - else - ltq_port_clear_altsel1(port, pin); -} - -int ltq_port_get_dir(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return -EINVAL; - - return (port_r32(ltq_port_base[port].base->dir) & (1 << pin)) != 0; -} - -int ltq_port_get_puden(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return -EINVAL; - - return (port_r32(ltq_port_base[port].base->puen) & (1 << pin)) != 0; -} - -int ltq_port_get_altsel0(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return -EINVAL; - - return (port_r32(ltq_port_base[port].base->altsel0) & (1 << pin)) != 0; -} - -int ltq_port_get_altsel1(unsigned int port, unsigned int pin) -{ - if (port >= MAX_PORTS || pin >= PINS_PER_PORT(port)) - return -EINVAL; - - return (port_r32(ltq_port_base[port].base->altsel1) & (1 << pin)) != 0; -} - -struct ltq_gpio_port { - struct gpio_chip gpio_chip; - unsigned int irq_base; - unsigned int chained_irq; -}; - -static struct ltq_gpio_port ltq_gpio_port[MAX_PORTS]; - -static int gpio_exported; -static int __init gpio_export_setup(char *str) -{ - get_option(&str, &gpio_exported); - return 1; -} -__setup("gpio_exported=", gpio_export_setup); - -static inline unsigned int offset2port(unsigned int offset) -{ - unsigned int i; - unsigned int prev = 0; - - for (i = 0; i < ARRAY_SIZE(ltq_port_base); i++) { - if (offset >= prev && - offset < prev + ltq_port_base[i].pins) - return i; - - prev = ltq_port_base[i].pins; - } - - return 0; -} - -static inline unsigned int offset2pin(unsigned int offset) -{ - unsigned int i; - unsigned int prev = 0; - - for (i = 0; i < ARRAY_SIZE(ltq_port_base); i++) { - if (offset >= prev && - offset < prev + ltq_port_base[i].pins) - return offset - prev; - - prev = ltq_port_base[i].pins; - } - - return 0; -} - -static int ltq_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) -{ - ltq_port_set_dir_in(offset2port(offset), offset2pin(offset)); - return 0; -} - -static int ltq_gpio_direction_output(struct gpio_chip *chip, - unsigned int offset, int value) -{ - ltq_port_set_dir_out(offset2port(offset), offset2pin(offset)); - return 0; -} - -static int ltq_gpio_get(struct gpio_chip *chip, unsigned int offset) -{ - return ltq_port_get_input(offset2port(offset), offset2pin(offset)); -} - -static void ltq_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) -{ - if (value) - ltq_port_set_output(offset2port(offset), offset2pin(offset)); - else - ltq_port_clear_output(offset2port(offset), offset2pin(offset)); -} - -static int svip_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return 0; -} - -static void ltq_gpio_free(struct gpio_chip *chip, unsigned offset) -{ -} - -static int ltq_gpio_probe(struct platform_device *pdev) -{ - int ret = 0; - struct ltq_gpio_port *gpio_port; - - if (pdev->id >= MAX_PORTS) - return -ENODEV; - - gpio_port = <q_gpio_port[pdev->id]; - gpio_port->gpio_chip.label = "ltq-gpio"; - - gpio_port->gpio_chip.direction_input = ltq_gpio_direction_input; - gpio_port->gpio_chip.direction_output = ltq_gpio_direction_output; - gpio_port->gpio_chip.get = ltq_gpio_get; - gpio_port->gpio_chip.set = ltq_gpio_set; - gpio_port->gpio_chip.request = svip_gpio_request; - gpio_port->gpio_chip.free = ltq_gpio_free; - gpio_port->gpio_chip.base = 100 * pdev->id; - gpio_port->gpio_chip.ngpio = 32; - gpio_port->gpio_chip.dev = &pdev->dev; - gpio_port->gpio_chip.exported = gpio_exported; - - ret = gpiochip_add(&gpio_port->gpio_chip); - if (ret < 0) { - dev_err(&pdev->dev, "Could not register gpiochip %d, %d\n", - pdev->id, ret); - goto err; - } - platform_set_drvdata(pdev, gpio_port); - - return 0; - -err: - return ret; -} - -static int ltq_gpio_remove(struct platform_device *pdev) -{ - struct ltq_gpio_port *gpio_port = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&gpio_port->gpio_chip); - - return ret; -} - -static struct platform_driver ltq_gpio_driver = { - .probe = ltq_gpio_probe, - .remove = __devexit_p(ltq_gpio_remove), - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, -}; - -int __init ltq_gpio_init(void) -{ - int ret = platform_driver_register(<q_gpio_driver); - if (ret) - printk(KERN_INFO DRV_NAME - ": Error registering platform driver!"); - return ret; -} - -postcore_initcall(ltq_gpio_init); - -/** - * Convert interrupt number to corresponding port/pin pair - * Returns the port/pin pair serving the selected external interrupt; - * needed since mapping not linear. - * - * \param exint External interrupt number - * \param port Pointer for resulting port - * \param pin Pointer for resutling pin - * \return -EINVAL Invalid exint - * \return 0 port/pin updated - * \ingroup API - */ -static int ltq_exint2port(u32 exint, int *port, int *pin) -{ - if ((exint >= 0) && (exint <= 10)) { - *port = 0; - *pin = exint + 7; - } else if ((exint >= 11) && (exint <= 14)) { - *port = 1; - *pin = 18 - (exint - 11) ; - } else if (exint == 15) { - *port = 1; - *pin = 19; - } else if (exint == 16) { - *port = 0; - *pin = 19; - } else { - return -EINVAL; - } - return 0; -} - -/** - * Enable external interrupt. - * This function enables an external interrupt and sets the given mode. - * valid values for mode are: - * - 0 = Interrupt generation disabled - * - 1 = Interrupt on rising edge - * - 2 = Interrupt on falling edge - * - 3 = Interrupt on rising and falling edge - * - 5 = Interrupt on high level detection - * - 6 = Interrupt on low level detection - * - * \param exint - Number of external interrupt - * \param mode - Trigger mode - * \return 0 on success - * \ingroup API - */ -int ifx_enable_external_int(u32 exint, u32 mode) -{ - int port; - int pin; - - if ((mode < 0) || (mode > 6)) - return -EINVAL; - - if (ltq_exint2port(exint, &port, &pin)) - return -EINVAL; - - ltq_port_clear_exintcr0(port, pin); - ltq_port_clear_exintcr1(port, pin); - ltq_port_clear_irncfg(port, pin); - - if (mode & 0x1) - ltq_port_set_exintcr0(port, pin); - if (mode & 0x2) - ltq_port_set_exintcr1(port, pin); - if (mode & 0x4) - ltq_port_set_irncfg(port, pin); - - ltq_port_set_irnen(port, pin); - return 0; -} -EXPORT_SYMBOL(ifx_enable_external_int); - -/** - * Disable external interrupt. - * This function disables an external interrupt and sets mode to 0x00. - * - * \param exint - Number of external interrupt - * \return 0 on success - * \ingroup API - */ -int ifx_disable_external_int(u32 exint) -{ - int port; - int pin; - - if (ltq_exint2port(exint, &port, &pin)) - return -EINVAL; - - ltq_port_clear_irnen(port, pin); - return 0; -} -EXPORT_SYMBOL(ifx_disable_external_int); |