diff options
Diffstat (limited to 'target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c')
| -rw-r--r-- | target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c | 158 |
1 files changed, 68 insertions, 90 deletions
diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c index 8beb0b8200..931d3ac1d2 100644 --- a/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c +++ b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c @@ -13,9 +13,10 @@ * 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) 2004 btxu Generate from INCA-IP project + * Copyright (C) 2005 Jin-Sze.Sow Comments edited + * Copyright (C) 2006 Huang Xiaogang Modification & verification on Danube chip * Copyright (C) 2007 John Crispin <blogic@openwrt.org> - * */ #include <linux/module.h> @@ -43,10 +44,6 @@ #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 @@ -65,58 +62,51 @@ struct event_t { }; #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_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_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_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)); - + 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_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)); - + 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_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)); - + 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); @@ -125,97 +115,96 @@ 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)); - + 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_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)); - + 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_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)); - + 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_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)); - + 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_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)); - + 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_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)); - + 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_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)); - + 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_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)); - + 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_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)); - + 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_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 @@ -224,54 +213,56 @@ ifxmips_port_get_input (unsigned int port, unsigned int pin) EXPORT_SYMBOL(ifxmips_port_get_input); int -ifxmips_port_set_altsel0 (unsigned int port, unsigned int pin) +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)); - + 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_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)); - + 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_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)); - + 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_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)); - + 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) +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) +static void +hotplug_button(struct work_struct *wq) { struct sk_buff *skb; struct event_t *event; @@ -280,21 +271,17 @@ static void hotplug_button(struct work_struct *wq) char buf[128]; event = container_of(wq, struct event_t, wq); - if (!uevent_sock) + 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) + 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"); @@ -307,12 +294,12 @@ static void hotplug_button(struct work_struct *wq) 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) +static void +reset_button_poll(unsigned long unused) { struct event_t *event; @@ -325,7 +312,7 @@ static void reset_button_poll(unsigned long unused) pressed = 0; else pressed = 1; - printk("button was %s\n", (pressed ? "pressed" : "released")); + printk("reset button was %s\n", (pressed ? "pressed" : "released")); event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC); if (!event) { @@ -342,39 +329,30 @@ static void reset_button_poll(unsigned long unused) #endif static int -ifxmips_gpio_probe (struct platform_device *dev) +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) +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; } @@ -383,22 +361,22 @@ platform_driver ifxmips_gpio_driver = { .probe = ifxmips_gpio_probe, .remove = ifxmips_gpio_remove, .driver = { - .name = DRVNAME, + .name = "ifxmips_gpio", .owner = THIS_MODULE, }, }; int __init -ifxmips_gpio_init (void) +ifxmips_gpio_init(void) { int ret = platform_driver_register(&ifxmips_gpio_driver); if (ret) - printk(KERN_INFO DRVNAME ": Error registering platfom driver!"); + printk(KERN_INFO "ifxmips_gpio : Error registering platfom driver!"); return ret; } void __exit -ifxmips_gpio_exit (void) +ifxmips_gpio_exit(void) { platform_driver_unregister(&ifxmips_gpio_driver); } |