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

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