Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bebb8a2bc180a4c920c57e89b2d713a34c1d096c
Commit:     bebb8a2bc180a4c920c57e89b2d713a34c1d096c
Parent:     24bf10ab2d72863a14187905fd992ca8119c809e
Author:     Yoichi Yuasa <[EMAIL PROTECTED]>
AuthorDate: Sun Feb 18 01:50:18 2007 -0500
Committer:  Dmitry Torokhov <[EMAIL PROTECTED]>
CommitDate: Sun Feb 18 01:50:18 2007 -0500

    Input: add driver for MIPS Cobalt back panel buttons
    
    Tested on Cobalt Qube2.
    
    Signed-off-by: Yoichi Yuasa <[EMAIL PROTECTED]>
    Signed-off-by: Dmitry Torokhov <[EMAIL PROTECTED]>
---
 drivers/input/misc/Kconfig       |   11 ++-
 drivers/input/misc/Makefile      |    1 +
 drivers/input/misc/cobalt_btns.c |  209 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 220 insertions(+), 1 deletions(-)

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 41b4258..5694115 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -40,6 +40,15 @@ config INPUT_M68K_BEEP
        tristate "M68k Beeper support"
        depends on M68K
 
+config INPUT_COBALT_BTNS
+       tristate "Cobalt button interface"
+       depends on MIPS_COBALT
+       help
+         Say Y here if you want to support MIPS Cobalt button interface.
+
+         To compile this driver as a module, choose M here: the
+         module will be called cobalt_btns.
+
 config INPUT_WISTRON_BTNS
        tristate "x86 Wistron laptop button interface"
        depends on X86 && !X86_64
@@ -82,7 +91,7 @@ config INPUT_UINPUT
          module will be called uinput.
 
 config HP_SDC_RTC
-       tristate "HP SDC Real Time Clock"       
+       tristate "HP SDC Real Time Clock"
        depends on GSC || HP300
        select HP_SDC
        help
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index e0a8d58..9f08f27 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_INPUT_SPARCSPKR)           += sparcspkr.o
 obj-$(CONFIG_INPUT_PCSPKR)             += pcspkr.o
 obj-$(CONFIG_INPUT_M68K_BEEP)          += m68kspkr.o
 obj-$(CONFIG_INPUT_UINPUT)             += uinput.o
+obj-$(CONFIG_INPUT_COBALT_BTNS)                += cobalt_btns.o
 obj-$(CONFIG_INPUT_WISTRON_BTNS)       += wistron_btns.o
 obj-$(CONFIG_INPUT_ATLAS_BTNS)         += atlas_btns.o
 obj-$(CONFIG_HP_SDC_RTC)               += hp_sdc_rtc.o
diff --git a/drivers/input/misc/cobalt_btns.c b/drivers/input/misc/cobalt_btns.c
new file mode 100644
index 0000000..b14f49e
--- /dev/null
+++ b/drivers/input/misc/cobalt_btns.c
@@ -0,0 +1,209 @@
+/*
+ *  Cobalt button interface driver.
+ *
+ *  Copyright (C) 2007  Yoichi Yuasa <[EMAIL PROTECTED]>
+ *
+ *  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.  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 Street, Fifth Floor, Boston, MA  02110-1301  
USA
+ */
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+
+#define BUTTONS_POLL_INTERVAL  30      /* msec */
+#define BUTTONS_COUNT_THRESHOLD        3
+#define BUTTONS_STATUS_MASK    0xfe000000
+
+struct buttons_dev {
+       struct input_dev *input;
+       void __iomem *reg;
+};
+
+struct buttons_map {
+       uint32_t mask;
+       int keycode;
+       int count;
+};
+
+static struct buttons_map buttons_map[] = {
+       { 0x02000000, KEY_RESTART, },
+       { 0x04000000, KEY_LEFT, },
+       { 0x08000000, KEY_UP, },
+       { 0x10000000, KEY_DOWN, },
+       { 0x20000000, KEY_RIGHT, },
+       { 0x40000000, KEY_ENTER, },
+       { 0x80000000, KEY_SELECT, },
+};
+
+static struct resource cobalt_buttons_resource __initdata = {
+       .start  = 0x1d000000,
+       .end    = 0x1d000003,
+       .flags  = IORESOURCE_MEM,
+};
+
+static struct platform_device *cobalt_buttons_device;
+
+static struct timer_list buttons_timer;
+
+static void handle_buttons(unsigned long data)
+{
+       struct buttons_map *button = buttons_map;
+       struct buttons_dev *bdev;
+       uint32_t status;
+       int i;
+
+       bdev = (struct buttons_dev *)data;
+       status = readl(bdev->reg);
+       status = ~status & BUTTONS_STATUS_MASK;
+
+       for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
+               if (status & button->mask) {
+                       button->count++;
+               } else {
+                       if (button->count >= BUTTONS_COUNT_THRESHOLD) {
+                               input_report_key(bdev->input, button->keycode, 
0);
+                               input_sync(bdev->input);
+                       }
+                       button->count = 0;
+               }
+
+               if (button->count == BUTTONS_COUNT_THRESHOLD) {
+                       input_report_key(bdev->input, button->keycode, 1);
+                       input_sync(bdev->input);
+               }
+
+               button++;
+       }
+
+       mod_timer(&buttons_timer, jiffies + 
msecs_to_jiffies(BUTTONS_POLL_INTERVAL));
+}
+
+static int cobalt_buttons_open(struct input_dev *dev)
+{
+       mod_timer(&buttons_timer, jiffies + 
msecs_to_jiffies(BUTTONS_POLL_INTERVAL));
+
+       return 0;
+}
+
+static void cobalt_buttons_close(struct input_dev *dev)
+{
+       del_timer_sync(&buttons_timer);
+}
+
+static int __devinit cobalt_buttons_probe(struct platform_device *pdev)
+{
+       struct buttons_dev *bdev;
+       struct input_dev *input;
+       struct resource *res;
+       int error, i;
+
+       bdev = kzalloc(sizeof(struct buttons_dev), GFP_KERNEL);
+       input = input_allocate_device();
+       if (!bdev || !input) {
+               error = -ENOMEM;
+               goto err_free_mem;
+       }
+
+       input->name = "Cobalt buttons";
+       input->phys = "cobalt/input0";
+       input->id.bustype = BUS_HOST;
+       input->cdev.dev = &pdev->dev;
+       input->open = cobalt_buttons_open;
+       input->close = cobalt_buttons_close;
+
+       input->evbit[0] = BIT(EV_KEY);
+       for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
+               set_bit(buttons_map[i].keycode, input->keybit);
+               buttons_map[i].count = 0;
+       }
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               error = -EBUSY;
+               goto err_free_mem;
+       }
+
+       bdev->input = input;
+       bdev->reg = ioremap(res->start, res->end - res->start + 1);
+       dev_set_drvdata(&pdev->dev, bdev);
+
+       setup_timer(&buttons_timer, handle_buttons, (unsigned long)bdev);
+
+       error = input_register_device(input);
+       if (error)
+               goto err_iounmap;
+
+       return 0;
+
+ err_iounmap:
+       iounmap(bdev->reg);
+ err_free_mem:
+       input_free_device(input);
+       kfree(bdev);
+       dev_set_drvdata(&pdev->dev, NULL);
+       return error;
+}
+
+static int __devexit cobalt_buttons_remove(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       struct buttons_dev *bdev = dev_get_drvdata(dev);
+
+       input_unregister_device(bdev->input);
+       iounmap(bdev->reg);
+       kfree(bdev);
+       dev_set_drvdata(dev, NULL);
+
+       return 0;
+}
+
+static struct platform_driver cobalt_buttons_driver = {
+       .probe  = cobalt_buttons_probe,
+       .remove = __devexit_p(cobalt_buttons_remove),
+       .driver = {
+               .name   = "Cobalt buttons",
+               .owner  = THIS_MODULE,
+       },
+};
+
+static int __init cobalt_buttons_init(void)
+{
+       int retval;
+
+       cobalt_buttons_device = platform_device_register_simple("Cobalt 
buttons", -1,
+                                                               
&cobalt_buttons_resource, 1);
+       if (IS_ERR(cobalt_buttons_device)) {
+               retval = PTR_ERR(cobalt_buttons_device);
+               return retval;
+       }
+
+       retval = platform_driver_register(&cobalt_buttons_driver);
+       if (retval < 0)
+               platform_device_unregister(cobalt_buttons_device);
+
+       return retval;
+}
+
+static void __exit cobalt_buttons_exit(void)
+{
+       platform_driver_unregister(&cobalt_buttons_driver);
+       platform_device_unregister(cobalt_buttons_device);
+}
+
+module_init(cobalt_buttons_init);
+module_exit(cobalt_buttons_exit);
-
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