Input: via-pmu - add input device support

Add an input device for the button and lid switch so that userspace gets
notified about the user pressing them via the standard input layer.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

4 files changed, 97 insertions, 1 deletions

diff --git a/drivers/macintosh/Makefile b/drivers/macintosh/Makefile
index 8972e53d2dc..45a268f8047 100644
--- a/drivers/macintosh/Makefile
+++ b/drivers/macintosh/Makefile
@@ -11,7 +11,7 @@ obj-$(CONFIG_MAC_EMUMOUSEBTN)	+= mac_hid.o
 obj-$(CONFIG_INPUT_ADBHID)      += adbhid.o
 obj-$(CONFIG_ANSLCD)            += ans-lcd.o
 
-obj-$(CONFIG_ADB_PMU)           += via-pmu.o
+obj-$(CONFIG_ADB_PMU)           += via-pmu.o via-pmu-event.o
 obj-$(CONFIG_PMAC_BACKLIGHT)    += via-pmu-backlight.o
 obj-$(CONFIG_ADB_CUDA)          += via-cuda.o
 obj-$(CONFIG_PMAC_APM_EMU)      += apm_emu.o
diff --git a/drivers/macintosh/via-pmu-event.c b/drivers/macintosh/via-pmu-event.c
new file mode 100644
index 00000000000..25cd5654232
--- /dev/null
+++ b/drivers/macintosh/via-pmu-event.c
@@ -0,0 +1,80 @@
+/*
+ * via-pmu event device for reporting some events that come through the PMU
+ *
+ * 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/input.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include "via-pmu-event.h"
+
+static struct input_dev *pmu_input_dev;
+
+static int __init via_pmu_event_init(void)
+{
+        int err;
+
+        /* do other models report button/lid status? */
+        if (pmu_get_model() != PMU_KEYLARGO_BASED)
+                return -ENODEV;
+
+        pmu_input_dev = input_allocate_device();
+        if (!pmu_input_dev)
+                return -ENOMEM;
+
+        pmu_input_dev->name = "PMU";
+        pmu_input_dev->id.bustype = BUS_HOST;
+        pmu_input_dev->id.vendor = 0x0001;
+        pmu_input_dev->id.product = 0x0001;
+        pmu_input_dev->id.version = 0x0100;
+
+        set_bit(EV_KEY, pmu_input_dev->evbit);
+        set_bit(EV_SW, pmu_input_dev->evbit);
+        set_bit(KEY_POWER, pmu_input_dev->keybit);
+        set_bit(SW_LID, pmu_input_dev->swbit);
+
+        err = input_register_device(pmu_input_dev);
+        if (err)
+                input_free_device(pmu_input_dev);
+        return err;
+}
+
+void via_pmu_event(int key, int down)
+{
+
+        if (unlikely(!pmu_input_dev))
+                return;
+
+        switch (key) {
+        case PMU_EVT_POWER:
+                input_report_key(pmu_input_dev, KEY_POWER, down);
+                break;
+        case PMU_EVT_LID:
+                input_report_switch(pmu_input_dev, SW_LID, down);
+                break;
+        default:
+                /* no such key handled */
+                return;
+        }
+
+        input_sync(pmu_input_dev);
+}
+
+late_initcall(via_pmu_event_init);
diff --git a/drivers/macintosh/via-pmu-event.h b/drivers/macintosh/via-pmu-event.h
new file mode 100644
index 00000000000..72c54de408e
--- /dev/null
+++ b/drivers/macintosh/via-pmu-event.h
@@ -0,0 +1,8 @@
+#ifndef __VIA_PMU_EVENT_H
+#define __VIA_PMU_EVENT_H
+
+#define PMU_EVT_POWER   0
+#define PMU_EVT_LID     1
+extern void via_pmu_event(int key, int down);
+
+#endif /* __VIA_PMU_EVENT_H */
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 2a355ae5956..1ab4f16c08b 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -69,6 +69,8 @@
 #include <asm/open_pic.h>
 #endif
 
+#include "via-pmu-event.h"
+
 /* Some compile options */
 #undef SUSPEND_USES_PMU
 #define DEBUG_SLEEP
@@ -1427,6 +1429,12 @@ next:
                 if (pmu_battery_count)
                         query_battery_state();
                 pmu_pass_intr(data, len);
+                /* len == 6 is probably a bad check. But how do I
+                 * know what PMU versions send what events here? */
+                if (len == 6) {
+                        via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
+                        via_pmu_event(PMU_EVT_LID, data[1]&1);
+                }
         } else {
                pmu_pass_intr(data, len);
         }