diff options
Diffstat (limited to 'target/linux/ifxmips/files/arch')
4 files changed, 421 insertions, 18 deletions
diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/Kconfig b/target/linux/ifxmips/files/arch/mips/ifxmips/Kconfig index aadbd5cf9..f01fcd362 100644 --- a/target/linux/ifxmips/files/arch/mips/ifxmips/Kconfig +++ b/target/linux/ifxmips/files/arch/mips/ifxmips/Kconfig @@ -20,10 +20,6 @@ config IFXMIPS_LED bool "IFXMips led" default y -config IFXMIPS_GPIO - bool "IFXMips gpio" - default y - config IFXMIPS_SSC bool "IFXMips ssc" default y diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/Makefile b/target/linux/ifxmips/files/arch/mips/ifxmips/Makefile index d9c8e6ad7..b221c37d6 100644 --- a/target/linux/ifxmips/files/arch/mips/ifxmips/Makefile +++ b/target/linux/ifxmips/files/arch/mips/ifxmips/Makefile @@ -1 +1 @@ -obj-y := reset.o prom.o setup.o interrupt.o dma-core.o pmu.o board.o cgu.o gptu.o +obj-y := reset.o prom.o setup.o interrupt.o dma-core.o pmu.o board.o cgu.o gptu.o gpio.o diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c new file mode 100644 index 000000000..8beb0b820 --- /dev/null +++ b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c @@ -0,0 +1,407 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2005 infineon + * Copyright (C) 2007 John Crispin <blogic@openwrt.org> + * + */ + +#include <linux/module.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/module.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 <asm/uaccess.h> +#include <asm/semaphore.h> +#include <asm/uaccess.h> +#include <asm/ifxmips/ifxmips.h> +#include <asm/ifxmips/ifxmips_ioctl.h> + +#define MAX_PORTS 2 +#define PINS_PER_PORT 16 + +#define DRVNAME "ifxmips_gpio" + +static unsigned int ifxmips_gpio_major = 0; + +#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN +#define IFXMIPS_RST_PIN 15 +#define IFXMIPS_RST_PORT 1 + +static struct timer_list rst_button_timer; + +extern struct sock *uevent_sock; +extern u64 uevent_next_seqnum(void); +static unsigned long seen; +static int pressed = 0; + +struct event_t { + struct work_struct wq; + int set; + unsigned long jiffies; +}; +#endif + +/* TODO do we need this ? */ +static struct semaphore port_sem; + +/* TODO do we really need this ? return in a define is forbidden by coding style */ +#define IFXMIPS_GPIO_SANITY {if (port > MAX_PORTS || pin > PINS_PER_PORT) return -EINVAL; } + +int +ifxmips_port_reserve_pin (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + printk("%s : call to obseleted function\n", __func__); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_reserve_pin); + +int +ifxmips_port_free_pin (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + printk("%s : call to obseleted function\n", __func__); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_free_pin); + +int +ifxmips_port_set_open_drain (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OD + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_OD + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_open_drain); + +int +ifxmips_port_clear_open_drain (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OD + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_OD + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_clear_open_drain); + +int +ifxmips_port_set_pudsel (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_pudsel); + +int +ifxmips_port_clear_pudsel (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_clear_pudsel); + +int +ifxmips_port_set_puden (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_puden); + +int +ifxmips_port_clear_puden (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_clear_puden); + +int +ifxmips_port_set_stoff (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_STOFF + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_stoff); + +int +ifxmips_port_clear_stoff (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_STOFF + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_clear_stoff); + +int +ifxmips_port_set_dir_out (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_DIR + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_dir_out); + +int +ifxmips_port_set_dir_in (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_DIR + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_dir_in); + +int +ifxmips_port_set_output (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_OUT + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_output); + +int +ifxmips_port_clear_output (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_OUT + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_clear_output); + +int +ifxmips_port_get_input (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + + if (ifxmips_r32(IFXMIPS_GPIO_P0_IN + (port * 0xC)) & (1 << pin)) + return 0; + else + return 1; +} +EXPORT_SYMBOL(ifxmips_port_get_input); + +int +ifxmips_port_set_altsel0 (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_altsel0); + +int +ifxmips_port_clear_altsel0 (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_clear_altsel0); + +int +ifxmips_port_set_altsel1 (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_set_altsel1); + +int +ifxmips_port_clear_altsel1 (unsigned int port, unsigned int pin) +{ + IFXMIPS_GPIO_SANITY; + ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)); + + return 0; +} +EXPORT_SYMBOL(ifxmips_port_clear_altsel1); + +#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN +static inline void add_msg(struct sk_buff *skb, char *msg) +{ + char *scratch; + scratch = skb_put(skb, strlen(msg) + 1); + sprintf(scratch, msg); +} + +static void hotplug_button(struct work_struct *wq) +{ + struct sk_buff *skb; + struct event_t *event; + size_t len; + char *scratch, *s; + char buf[128]; + + event = container_of(wq, struct event_t, wq); + if (!uevent_sock) + goto done; + + /* allocate message with the maximum possible size */ + s = event->set ? "pressed" : "released"; + len = strlen(s) + 2; + skb = alloc_skb(len + 2048, GFP_KERNEL); + if (!skb) + goto done; + + /* add header */ + scratch = skb_put(skb, len); + sprintf(scratch, "%s@",s); + + /* copy keys to our continuous event payload buffer */ + add_msg(skb, "HOME=/"); + add_msg(skb, "PATH=/sbin:/bin:/usr/sbin:/usr/bin"); + add_msg(skb, "SUBSYSTEM=button"); + add_msg(skb, "BUTTON=reset"); + add_msg(skb, (event->set ? "ACTION=pressed" : "ACTION=released")); + sprintf(buf, "SEEN=%ld", (event->jiffies - seen)/HZ); + add_msg(skb, buf); + snprintf(buf, 128, "SEQNUM=%llu", uevent_next_seqnum()); + add_msg(skb, buf); + + NETLINK_CB(skb).dst_group = 1; + netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL); + +done: + kfree(event); +} + +static void reset_button_poll(unsigned long unused) +{ + struct event_t *event; + + rst_button_timer.expires = jiffies + HZ; + add_timer(&rst_button_timer); + + if (pressed != ifxmips_port_get_input(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN)) + { + if(pressed) + pressed = 0; + else + pressed = 1; + printk("button was %s\n", (pressed ? "pressed" : "released")); + event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC); + if (!event) + { + printk("Could not alloc hotplug event\n"); + return; + } + event->set = pressed; + event->jiffies = jiffies; + INIT_WORK(&event->wq, (void *)(void *)hotplug_button); + schedule_work(&event->wq); + seen = jiffies; + } +} +#endif + +static int +ifxmips_gpio_probe (struct platform_device *dev) +{ + int retval = 0; + + sema_init (&port_sem, 1); + +#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN + ifxmips_port_set_open_drain(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN); + ifxmips_port_clear_altsel0(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN); + ifxmips_port_clear_altsel1(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN); + ifxmips_port_set_dir_in(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN); + + seen = jiffies; + + init_timer(&rst_button_timer); + rst_button_timer.function = reset_button_poll; + rst_button_timer.expires = jiffies + HZ; + add_timer(&rst_button_timer); +#endif + + printk(KERN_INFO DRVNAME ": device successfully initialized #%d.\n", ifxmips_gpio_major); + + return retval; +} + +static int +ifxmips_gpio_remove (struct platform_device *pdev) +{ +#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN + del_timer_sync(&rst_button_timer); +#endif + unregister_chrdev(ifxmips_gpio_major, DRVNAME); + + return 0; +} + +static struct +platform_driver ifxmips_gpio_driver = { + .probe = ifxmips_gpio_probe, + .remove = ifxmips_gpio_remove, + .driver = { + .name = DRVNAME, + .owner = THIS_MODULE, + }, +}; + +int __init +ifxmips_gpio_init (void) +{ + int ret = platform_driver_register(&ifxmips_gpio_driver); + if (ret) + printk(KERN_INFO DRVNAME ": Error registering platfom driver!"); + return ret; +} + +void __exit +ifxmips_gpio_exit (void) +{ + platform_driver_unregister(&ifxmips_gpio_driver); +} + +module_init(ifxmips_gpio_init); +module_exit(ifxmips_gpio_exit); diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/reset.c b/target/linux/ifxmips/files/arch/mips/ifxmips/reset.c index 4953c60c8..1b2aef327 100644 --- a/target/linux/ifxmips/files/arch/mips/ifxmips/reset.c +++ b/target/linux/ifxmips/files/arch/mips/ifxmips/reset.c @@ -32,33 +32,33 @@ #include <asm/ifxmips/ifxmips.h> static void -ifxmips_machine_restart (char *command) +ifxmips_machine_restart(char *command) { - printk (KERN_NOTICE "System restart\n"); - local_irq_disable (); + printk(KERN_NOTICE "System restart\n"); + local_irq_disable(); - ifxmips_w32(ifxmips_r32(IFXMIPS_RCU_REQ) | IFXMIPS_RST_ALL, IFXMIPS_RCU_REQ); - for (;;); + ifxmips_w32(ifxmips_r32(IFXMIPS_RCU_RST) | IFXMIPS_RCU_RST_ALL, IFXMIPS_RCU_RST); + for(;;); } static void -ifxmips_machine_halt (void) +ifxmips_machine_halt(void) { - printk (KERN_NOTICE "System halted.\n"); - local_irq_disable (); - for (;;); + printk(KERN_NOTICE "System halted.\n"); + local_irq_disable(); + for(;;); } static void -ifxmips_machine_power_off (void) +ifxmips_machine_power_off(void) { printk (KERN_NOTICE "Please turn off the power now.\n"); - local_irq_disable (); - for (;;); + local_irq_disable(); + for(;;); } void -ifxmips_reboot_setup (void) +ifxmips_reboot_setup(void) { _machine_restart = ifxmips_machine_restart; _machine_halt = ifxmips_machine_halt; |