Input: sgi_btns - add support for SGI Indy volume buttons

Also rename sgio2_btns to sgi_btns since the driver is not only
for SGI O2 anymore.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 54 insertions, 32 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index e33d7cbcb1df..e99b7882f382 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -189,15 +189,15 @@ config INPUT_UINPUT
           To compile this driver as a module, choose M here: the
           module will be called uinput.
 
-config INPUT_SGIO2_BTNS
-        tristate "SGI O2 volume button interface"
-        depends on SGI_IP32
+config INPUT_SGI_BTNS
+        tristate "SGI Indy/O2 volume button interface"
+        depends on SGI_IP22 || SGI_IP32
         select INPUT_POLLDEV
         help
-          Say Y here if you want to support SGI O2 volume button interface.
+          Say Y here if you want to support SGI Indy/O2 volume button interface.
 
           To compile this driver as a module, choose M here: the
-          module will be called sgio_btns.
+          module will be called sgi_btns.
 
 config HP_SDC_RTC
         tristate "HP SDC Real Time Clock"
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 0e274f19bcb3..f48009b52226 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -19,4 +19,4 @@ obj-$(CONFIG_INPUT_YEALINK)		+= yealink.o
 obj-$(CONFIG_HP_SDC_RTC)                += hp_sdc_rtc.o
 obj-$(CONFIG_INPUT_UINPUT)              += uinput.o
 obj-$(CONFIG_INPUT_APANEL)              += apanel.o
-obj-$(CONFIG_INPUT_SGIO2_BTNS)          += sgio2_btns.o
+obj-$(CONFIG_INPUT_SGI_BTNS)            += sgi_btns.o
diff --git a/drivers/input/misc/sgio2_btns.c b/drivers/input/misc/sgi_btns.c
index b1ab43d903dd..ce238f59b3c8 100644
--- a/drivers/input/misc/sgio2_btns.c
+++ b/drivers/input/misc/sgi_btns.c
@@ -1,5 +1,5 @@
 /*
- *  SGI O2 Volume Button interface driver
+ *  SGI Volume Button interface driver
  *
  *  Copyright (C) 2008  Thomas Bogendoerfer <tsbogend@alpha.franken.de>
  *
@@ -23,35 +23,57 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 
+#ifdef CONFIG_SGI_IP22
+#include <asm/sgi/ioc.h>
+
+static inline u8 button_status(void)
+{
+        u8 status;
+
+        status = readb(&sgioc->panel) ^ 0xa0;
+        return ((status & 0x80) >> 6) | ((status & 0x20) >> 5);
+}
+#endif
+
+#ifdef CONFIG_SGI_IP32
 #include <asm/ip32/mace.h>
 
+static inline u8 button_status(void)
+{
+        u64 status;
+
+        status = readq(&mace->perif.audio.control);
+        writeq(status & ~(3U << 23), &mace->perif.audio.control);
+
+        return (status >> 23) & 3;
+}
+#endif
+
 #define BUTTONS_POLL_INTERVAL   30      /* msec */
 #define BUTTONS_COUNT_THRESHOLD 3
 
-static const unsigned short sgio2_map[] = {
-        KEY_VOLUMEUP,
-        KEY_VOLUMEDOWN
+static const unsigned short sgi_map[] = {
+        KEY_VOLUMEDOWN,
+        KEY_VOLUMEUP
 };
 
 struct buttons_dev {
         struct input_polled_dev *poll_dev;
-        unsigned short keymap[ARRAY_SIZE(sgio2_map)];
-        int count[ARRAY_SIZE(sgio2_map)];
-        void __iomem *reg;
+        unsigned short keymap[ARRAY_SIZE(sgi_map)];
+        int count[ARRAY_SIZE(sgi_map)];
 };
 
 static void handle_buttons(struct input_polled_dev *dev)
 {
         struct buttons_dev *bdev = dev->private;
         struct input_dev *input = dev->input;
-        u64 status;
+        u8 status;
         int i;
 
-        status = (readq(&mace->perif.audio.control) >> 23) & 3;
+        status = button_status();
 
         for (i = 0; i < ARRAY_SIZE(bdev->keymap); i++) {
                 if (status & (1U << i)) {
-                        writeq(status & ~(1U << i), &mace->perif.audio.control);
                         if (++bdev->count[i] == BUTTONS_COUNT_THRESHOLD) {
                                 input_event(input, EV_MSC, MSC_SCAN, i);
                                 input_report_key(input, bdev->keymap[i], 1);
@@ -68,7 +90,7 @@ static void handle_buttons(struct input_polled_dev *dev)
         }
 }
 
-static int __devinit sgio2_buttons_probe(struct platform_device *pdev)
+static int __devinit sgi_buttons_probe(struct platform_device *pdev)
 {
         struct buttons_dev *bdev;
         struct input_polled_dev *poll_dev;
@@ -82,15 +104,15 @@ static int __devinit sgio2_buttons_probe(struct platform_device *pdev)
                 goto err_free_mem;
         }
 
-        memcpy(bdev->keymap, sgio2_map, sizeof(bdev->keymap));
+        memcpy(bdev->keymap, sgi_map, sizeof(bdev->keymap));
 
         poll_dev->private = bdev;
         poll_dev->poll = handle_buttons;
         poll_dev->poll_interval = BUTTONS_POLL_INTERVAL;
 
         input = poll_dev->input;
-        input->name = "SGI O2 buttons";
-        input->phys = "sgio2/input0";
+        input->name = "SGI buttons";
+        input->phys = "sgi/input0";
         input->id.bustype = BUS_HOST;
         input->dev.parent = &pdev->dev;
 
@@ -100,7 +122,7 @@ static int __devinit sgio2_buttons_probe(struct platform_device *pdev)
 
         input_set_capability(input, EV_MSC, MSC_SCAN);
         __set_bit(EV_KEY, input->evbit);
-        for (i = 0; i < ARRAY_SIZE(sgio2_map); i++)
+        for (i = 0; i < ARRAY_SIZE(sgi_map); i++)
                 __set_bit(bdev->keymap[i], input->keybit);
         __clear_bit(KEY_RESERVED, input->keybit);
 
@@ -120,7 +142,7 @@ static int __devinit sgio2_buttons_probe(struct platform_device *pdev)
         return error;
 }
 
-static int __devexit sgio2_buttons_remove(struct platform_device *pdev)
+static int __devexit sgi_buttons_remove(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
         struct buttons_dev *bdev = dev_get_drvdata(dev);
@@ -133,24 +155,24 @@ static int __devexit sgio2_buttons_remove(struct platform_device *pdev)
         return 0;
 }
 
-static struct platform_driver sgio2_buttons_driver = {
-        .probe  = sgio2_buttons_probe,
-        .remove = __devexit_p(sgio2_buttons_remove),
+static struct platform_driver sgi_buttons_driver = {
+        .probe  = sgi_buttons_probe,
+        .remove = __devexit_p(sgi_buttons_remove),
         .driver = {
-                .name   = "sgio2btns",
+                .name   = "sgibtns",
                 .owner  = THIS_MODULE,
         },
 };
 
-static int __init sgio2_buttons_init(void)
+static int __init sgi_buttons_init(void)
 {
-        return platform_driver_register(&sgio2_buttons_driver);
+        return platform_driver_register(&sgi_buttons_driver);
 }
 
-static void __exit sgio2_buttons_exit(void)
+static void __exit sgi_buttons_exit(void)
 {
-        platform_driver_unregister(&sgio2_buttons_driver);
+        platform_driver_unregister(&sgi_buttons_driver);
 }
 
-module_init(sgio2_buttons_init);
-module_exit(sgio2_buttons_exit);
+module_init(sgi_buttons_init);
+module_exit(sgi_buttons_exit);