target/linux/ixp4xx/patches/997-fsg3_buttons.patch

   1 diff -Nur linux-2.6.21.6-orig/arch/arm/mach-ixp4xx/fsg-power.c linux-2.6.21.6/arch/arm/mach-ixp4xx/fsg-power.c
   2 --- linux-2.6.21.6-orig/arch/arm/mach-ixp4xx/fsg-power.c        1970-01-01 01:00:00.000000000 +0100
   3 +++ linux-2.6.21.6/arch/arm/mach-ixp4xx/fsg-power.c     2007-10-12 22:32:27.000000000 +0200
   4 @@ -0,0 +1,168 @@
   5 +/*
   6 + * arch/arm/mach-ixp4xx/fsg-power.c
   7 + *
   8 + * FSG buttons driver
   9 + *
  10 + * This program is free software; you can redistribute it and/or modify
  11 + * it under the terms of the GNU General Public License version 2 as
  12 + * published by the Free Software Foundation.
  13 + *
  14 + */
  15 +
  16 +#include <linux/module.h>
  17 +#include <linux/reboot.h>
  18 +#include <linux/irq.h>
  19 +#include <linux/interrupt.h>
  20 +#include <asm/mach-types.h>
  21 +#include <linux/kernel.h>
  22 +
  23 +struct event_t {
  24 +       struct work_struct wq;
  25 +       char *button_name;
  26 +       int action;
  27 +};
  28 +
  29 +static void hotplug_button(struct event_t *event)
  30 +{
  31 +       static char buf[128];
  32 +       char *argv[3], *envp[6], *action;
  33 +       int i;
  34 +
  35 +        i = 0;
  36 +        argv[i++] = "/sbin/hotplug";
  37 +        argv[i++] = "button";
  38 +        argv[i] = 0;
  39 +
  40 +       i = 0;
  41 +       /* minimal command environment */
  42 +       envp [i++] = "HOME=/";
  43 +       envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
  44 +       envp [i++] = "SUBSYSTEM=button";
  45 +
  46 +       snprintf(buf, 128, "BUTTON=%s", event->button_name);
  47 +       envp [i++] = buf;
  48 +
  49 +       action = event->action ? "released" : "pressed";
  50 +       snprintf(buf, 128, "ACTION=%s", action);
  51 +       envp [i++] = buf;
  52 +
  53 +       envp [i] = 0;
  54 +
  55 +       // create hotplug event
  56 +       call_usermodehelper (argv[0], argv, envp, 0);
  57 +
  58 +       //destroy event structure
  59 +       kfree(event);
  60 +}
  61 +
  62 +static irqreturn_t fsg_sync_button_handler(int irq, void *dev_id)
  63 +{
  64 +       int holdkey;
  65 +
  66 +       //check button status
  67 +       gpio_line_get(FSG_SB_GPIO, &holdkey);
  68 +
  69 +       struct event_t *event;
  70 +       //create event
  71 +       if ((event = (struct event_t *)kzalloc (sizeof(struct event_t), GFP_ATOMIC))) {
  72 +               event->action = holdkey;
  73 +               event->button_name = "sync";
  74 +
  75 +               INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
  76 +               schedule_work(&event->wq);
  77 +       }
  78 +
  79 +       return IRQ_HANDLED;
  80 +}
  81 +
  82 +static irqreturn_t fsg_reset_button_handler(int irq, void *dev_id)
  83 +{
  84 +       int holdkey;
  85 +
  86 +       //check button status
  87 +       gpio_line_get(FSG_RB_GPIO, &holdkey);
  88 +
  89 +       struct event_t *event;
  90 +       //create event
  91 +       if ((event = (struct event_t *)kzalloc (sizeof(struct event_t), GFP_ATOMIC))) {
  92 +               event->action = holdkey;
  93 +               event->button_name = "reset";
  94 +
  95 +               INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
  96 +               schedule_work(&event->wq);
  97 +       }
  98 +
  99 +       return IRQ_HANDLED;
 100 +}
 101 +
 102 +static irqreturn_t fsg_unplug_button_handler(int irq, void *dev_id)
 103 +{
 104 +       int holdkey;
 105 +
 106 +       //check button status
 107 +       gpio_line_get(FSG_UB_GPIO, &holdkey);
 108 +
 109 +       struct event_t *event;
 110 +       //create event
 111 +       if ((event = (struct event_t *)kzalloc (sizeof(struct event_t), GFP_ATOMIC))) {
 112 +               event->action = holdkey;
 113 +               event->button_name = "unplug";
 114 +
 115 +               INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
 116 +               schedule_work(&event->wq);
 117 +       }
 118 +
 119 +       return IRQ_HANDLED;
 120 +}
 121 +
 122 +static int __init fsg_buttons_init(void)
 123 +{
 124 +       if (!(machine_is_fsg()))
 125 +               return;
 126 +
 127 +       /* Configure interrupt input for SYNC button */
 128 +       set_irq_type(FSG_SB_IRQ, IRQT_BOTHEDGE);
 129 +       if (request_irq(FSG_SB_IRQ, &fsg_sync_button_handler, IRQF_DISABLED, "SYNC", NULL) < 0) {
 130 +               printk(KERN_DEBUG "SYNC button IRQ %d not available\n", FSG_SB_IRQ);
 131 +               return -EIO;
 132 +       }
 133 +       else
 134 +               printk("SYNC button registered on IRQ%d\n", FSG_SB_IRQ);
 135 +
 136 +       /* Configure interrupt input for RESET button */
 137 +       set_irq_type(FSG_RB_IRQ, IRQT_BOTHEDGE);
 138 +       if (request_irq(FSG_RB_IRQ, &fsg_reset_button_handler, IRQF_DISABLED, "RESET", NULL) < 0) {
 139 +               printk(KERN_DEBUG "RESET button IRQ %d not available\n", FSG_RB_IRQ);
 140 +               return -EIO;
 141 +       }
 142 +       else
 143 +               printk("RESET button registered on IRQ%d\n", FSG_RB_IRQ);
 144 +
 145 +       /* Configure interrupt input for UNPLUG button */
 146 +       set_irq_type(FSG_UB_IRQ, IRQT_BOTHEDGE);
 147 +       if (request_irq(FSG_UB_IRQ, &fsg_unplug_button_handler, IRQF_DISABLED, "RESET", NULL) < 0) {
 148 +               printk(KERN_DEBUG "UNPLUG button IRQ %d not available\n", FSG_UB_IRQ);
 149 +               return -EIO;
 150 +       }
 151 +       else
 152 +               printk("UNPLUG button registered on IRQ%d\n", FSG_UB_IRQ);
 153 +
 154 +       return 0;
 155 +}
 156 +
 157 +static void __exit fsg_buttons_exit(void)
 158 +{
 159 +       if (!(machine_is_fsg()))
 160 +               return;
 161 +
 162 +       free_irq(FSG_SB_IRQ, NULL);
 163 +       free_irq(FSG_RB_IRQ, NULL);
 164 +       free_irq(FSG_UB_IRQ, NULL);
 165 +}
 166 +
 167 +module_init(fsg_buttons_init);
 168 +module_exit(fsg_buttons_exit);
 169 +
 170 +MODULE_AUTHOR("Zintis Petersons <Zintis.Petersons@e-mail.lv>");
 171 +MODULE_DESCRIPTION("FSG buttons driver");
 172 +MODULE_LICENSE("GPL");
 173 diff -Nur linux-2.6.21.6-orig/arch/arm/mach-ixp4xx/Makefile linux-2.6.21.6/arch/arm/mach-ixp4xx/Makefile
 174 --- linux-2.6.21.6-orig/arch/arm/mach-ixp4xx/Makefile   2007-10-12 14:34:18.000000000 +0200
 175 +++ linux-2.6.21.6/arch/arm/mach-ixp4xx/Makefile        2007-10-12 22:34:06.000000000 +0200
 176 @@ -30,7 +30,7 @@
 177  obj-$(CONFIG_MACH_NSLU2)       += nslu2-setup.o nslu2-power.o
 178  obj-$(CONFIG_MACH_NAS100D)     += nas100d-setup.o nas100d-power.o
 179  obj-$(CONFIG_MACH_DSMG600)      += dsmg600-setup.o dsmg600-power.o
 180 -obj-$(CONFIG_MACH_FSG)          += fsg-setup.o
 181 +obj-$(CONFIG_MACH_FSG)          += fsg-setup.o fsg-power.o
 182  obj-$(CONFIG_MACH_GATEWAY7001) += gateway7001-setup.o
 183  obj-$(CONFIG_MACH_WG302V2)     += wg302v2-setup.o
 184  obj-$(CONFIG_MACH_PRONGHORNMETRO)      += pronghornmetro-setup.o