[POWERPC] Celleb: Support for Power/Reset buttons

[cascardo/linux.git] / arch / powerpc / platforms / celleb / beat.c

diff --git a/arch/powerpc/platforms/celleb/beat.c b/arch/powerpc/platforms/celleb/beat.c
index ced6f68..93ebb7d 100644 (file)
--- a/arch/powerpc/platforms/celleb/beat.c
+++ b/arch/powerpc/platforms/celleb/beat.c
@@ -22,16 +22,24 @@
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/rtc.h>
+#include <linux/interrupt.h>
+#include <linux/irqreturn.h>
+#include <linux/reboot.h>
 
 #include <asm/hvconsole.h>
 #include <asm/time.h>
+#include <asm/machdep.h>
+#include <asm/firmware.h>
 
 #include "beat_wrapper.h"
 #include "beat.h"
+#include "interrupt.h"
+
+static int beat_pm_poweroff_flag;
 
 void beat_restart(char *cmd)
 {
-       beat_shutdown_logical_partition(1);
+       beat_shutdown_logical_partition(!beat_pm_poweroff_flag);
 }
 
 void beat_power_off(void)
@@ -170,6 +178,90 @@ void beat_kexec_cpu_down(int crash, int secondary)
 }
 #endif
 
+static irqreturn_t beat_power_event(int virq, void *arg)
+{
+       printk(KERN_DEBUG "Beat: power button pressed\n");
+       beat_pm_poweroff_flag = 1;
+       ctrl_alt_del();
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t beat_reset_event(int virq, void *arg)
+{
+       printk(KERN_DEBUG "Beat: reset button pressed\n");
+       beat_pm_poweroff_flag = 0;
+       ctrl_alt_del();
+       return IRQ_HANDLED;
+}
+
+static struct beat_event_list {
+       const char *typecode;
+       irq_handler_t handler;
+       unsigned int virq;
+} beat_event_list[] = {
+       { "power", beat_power_event, 0 },
+       { "reset", beat_reset_event, 0 },
+};
+
+static int __init beat_register_event(void)
+{
+       u64 path[4], data[2];
+       int rc, i;
+       unsigned int virq;
+
+       for (i = 0; i < ARRAY_SIZE(beat_event_list); i++) {
+               struct beat_event_list *ev = &beat_event_list[i];
+
+               if (beat_construct_event_receive_port(data) != 0) {
+                       printk(KERN_ERR "Beat: "
+                              "cannot construct event receive port for %s\n",
+                              ev->typecode);
+                       return -EINVAL;
+               }
+
+               virq = irq_create_mapping(NULL, data[0]);
+               if (virq == NO_IRQ) {
+                       printk(KERN_ERR "Beat: failed to get virtual IRQ"
+                              " for event receive port for %s\n",
+                              ev->typecode);
+                       beat_destruct_event_receive_port(data[0]);
+                       return -EIO;
+               }
+               ev->virq = virq;
+
+               rc = request_irq(virq, ev->handler, IRQF_DISABLED,
+                                     ev->typecode, NULL);
+               if (rc != 0) {
+                       printk(KERN_ERR "Beat: failed to request virtual IRQ"
+                              " for event receive port for %s\n",
+                              ev->typecode);
+                       beat_destruct_event_receive_port(data[0]);
+                       return rc;
+               }
+
+               path[0] = 0x1000000065780000ul; /* 1,ex */
+               path[1] = 0x627574746f6e0000ul; /* button */
+               path[2] = 0;
+               strncpy((char *)&path[2], ev->typecode, 8);
+               path[3] = 0;
+               data[1] = 0;
+
+               beat_create_repository_node(path, data);
+       }
+       return 0;
+}
+
+static int __init beat_event_init(void)
+{
+       if (!firmware_has_feature(FW_FEATURE_BEAT))
+               return -EINVAL;
+
+       beat_pm_poweroff_flag = 0;
+       return beat_register_event();
+}
+
+device_initcall(beat_event_init);
+
 EXPORT_SYMBOL(beat_get_term_char);
 EXPORT_SYMBOL(beat_put_term_char);
 EXPORT_SYMBOL(beat_halt_code);