This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / macintosh / via-pmu-led.c

diff --git a/drivers/macintosh/via-pmu-led.c b/drivers/macintosh/via-pmu-led.c
new file mode 100644 (file)
index 0000000..5189d54
--- /dev/null
+++ b/drivers/macintosh/via-pmu-led.c
@@ -0,0 +1,144 @@
+/*
+ * via-pmu LED class device
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT.  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/leds.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include <asm/prom.h>
+
+static spinlock_t pmu_blink_lock;
+static struct adb_request pmu_blink_req;
+/* -1: no change, 0: request off, 1: request on */
+static int requested_change;
+static int sleeping;
+
+static void pmu_req_done(struct adb_request * req)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&pmu_blink_lock, flags);
+       /* if someone requested a change in the meantime
+        * (we only see the last one which is fine)
+        * then apply it now */
+       if (requested_change != -1 && !sleeping)
+               pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
+       /* reset requested change */
+       requested_change = -1;
+       spin_unlock_irqrestore(&pmu_blink_lock, flags);
+}
+
+static void pmu_led_set(struct led_classdev *led_cdev,
+                       enum led_brightness brightness)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&pmu_blink_lock, flags);
+       switch (brightness) {
+       case LED_OFF:
+               requested_change = 0;
+               break;
+       case LED_FULL:
+               requested_change = 1;
+               break;
+       default:
+               goto out;
+               break;
+       }
+       /* if request isn't done, then don't do anything */
+       if (pmu_blink_req.complete && !sleeping)
+               pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
+ out:
+       spin_unlock_irqrestore(&pmu_blink_lock, flags);
+}
+
+static struct led_classdev pmu_led = {
+       .name = "pmu-front-led",
+#ifdef CONFIG_ADB_PMU_LED_IDE
+       .default_trigger = "ide-disk",
+#endif
+       .brightness_set = pmu_led_set,
+};
+
+#ifdef CONFIG_PM
+static int pmu_led_sleep_call(struct pmu_sleep_notifier *self, int when)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&pmu_blink_lock, flags);
+
+       switch (when) {
+       case PBOOK_SLEEP_REQUEST:
+               sleeping = 1;
+               break;
+       case PBOOK_WAKE:
+               sleeping = 0;
+               break;
+       default:
+               /* do nothing */
+               break;
+       }
+       spin_unlock_irqrestore(&pmu_blink_lock, flags);
+
+       return PBOOK_SLEEP_OK;
+}
+
+static struct pmu_sleep_notifier via_pmu_led_sleep_notif = {
+       .notifier_call = pmu_led_sleep_call,
+};
+#endif
+
+static int __init via_pmu_led_init(void)
+{
+       struct device_node *dt;
+       const char *model;
+
+       /* only do this on keylargo based models */
+       if (pmu_get_model() != PMU_KEYLARGO_BASED)
+               return -ENODEV;
+
+       dt = of_find_node_by_path("/");
+       if (dt == NULL)
+               return -ENODEV;
+       model = (const char *)get_property(dt, "model", NULL);
+       if (model == NULL)
+               return -ENODEV;
+       if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
+           strncmp(model, "iBook", strlen("iBook")) != 0) {
+               of_node_put(dt);
+               /* ignore */
+               return -ENODEV;
+       }
+       of_node_put(dt);
+
+       spin_lock_init(&pmu_blink_lock);
+       /* no outstanding req */
+       pmu_blink_req.complete = 1;
+       pmu_blink_req.done = pmu_req_done;
+#ifdef CONFIG_PM
+       pmu_register_sleep_notifier(&via_pmu_led_sleep_notif);
+#endif
+       return led_classdev_register(NULL, &pmu_led);
+}
+
+late_initcall(via_pmu_led_init);