ACPI: thinkpad-acpi: register input device

Register an input device to send input events to userspace.

This patch is based on a patch by Richard Hughes <hughsient@gmail.com>.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Richard Hughes <hughsient@gmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 4d71893..4427c99 100644 (file)
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -510,13 +510,14 @@ static char *next_cmd(char **cmds)
 /****************************************************************************
  ****************************************************************************
  *
- * Device model: hwmon and platform
+ * Device model: input, hwmon and platform
  *
  ****************************************************************************
  ****************************************************************************/
 
 static struct platform_device *tpacpi_pdev;
 static struct class_device *tpacpi_hwmon;
+static struct input_dev *tpacpi_inputdev;
 
 static struct platform_driver tpacpi_pdriver = {
        .driver = {
@@ -4363,6 +4364,20 @@ static int __init thinkpad_acpi_module_init(void)
                thinkpad_acpi_module_exit();
                return ret;
        }
+       tpacpi_inputdev = input_allocate_device();
+       if (!tpacpi_inputdev) {
+               printk(IBM_ERR "unable to allocate input device\n");
+               thinkpad_acpi_module_exit();
+               return -ENOMEM;
+       } else {
+               /* Prepare input device, but don't register */
+               tpacpi_inputdev->name = "ThinkPad Extra Buttons";
+               tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
+               tpacpi_inputdev->id.bustype = BUS_HOST;
+               tpacpi_inputdev->id.vendor = TPACPI_HKEY_INPUT_VENDOR;
+               tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
+               tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
+       }
        for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
                ret = ibm_init(&ibms_init[i]);
                if (ret >= 0 && *ibms_init[i].param)
@@ -4372,6 +4387,14 @@ static int __init thinkpad_acpi_module_init(void)
                        return ret;
                }
        }
+       ret = input_register_device(tpacpi_inputdev);
+       if (ret < 0) {
+               printk(IBM_ERR "unable to register input device\n");
+               thinkpad_acpi_module_exit();
+               return ret;
+       } else {
+               tp_features.input_device_registered = 1;
+       }
 
        return 0;
 }
@@ -4388,6 +4411,13 @@ static void thinkpad_acpi_module_exit(void)
 
        dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
 
+       if (tpacpi_inputdev) {
+               if (tp_features.input_device_registered)
+                       input_unregister_device(tpacpi_inputdev);
+               else
+                       input_free_device(tpacpi_inputdev);
+       }
+
        if (tpacpi_hwmon)
                hwmon_device_unregister(tpacpi_hwmon);
 

diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 78ea4c8..00f1bd7 100644 (file)
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -39,6 +39,7 @@
 #include <linux/platform_device.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
+#include <linux/input.h>
 #include <asm/uaccess.h>
 
 #include <linux/dmi.h>
@@ -48,6 +49,7 @@
 #include <acpi/acpi_drivers.h>
 #include <acpi/acnamesp.h>
 
+#include <linux/pci_ids.h>
 
 /****************************************************************************
  * Main driver
@@ -98,6 +100,11 @@ static const char *str_supported(int is_supported);
 #define vdbg_printk(a_dbg_level, format, arg...)
 #endif
 
+/* Input IDs */
+#define TPACPI_HKEY_INPUT_VENDOR       PCI_VENDOR_ID_IBM
+#define TPACPI_HKEY_INPUT_PRODUCT      0x5054 /* "TP" */
+#define TPACPI_HKEY_INPUT_VERSION      0x4101
+
 /* ACPI HIDs */
 #define IBM_HKEY_HID    "IBM0068"
 #define IBM_PCI_HID     "PNP0A03"
@@ -161,6 +168,7 @@ static int parse_strtoul(const char *buf, unsigned long max,
 static struct platform_device *tpacpi_pdev;
 static struct class_device *tpacpi_hwmon;
 static struct platform_driver tpacpi_pdriver;
+static struct input_dev *tpacpi_inputdev;
 static int tpacpi_create_driver_attributes(struct device_driver *drv);
 static void tpacpi_remove_driver_attributes(struct device_driver *drv);
 
@@ -233,6 +241,7 @@ static struct {
        u16 light_status:1;
        u16 wan:1;
        u16 fan_ctrl_status_undef:1;
+       u16 input_device_registered:1;
 } tp_features;
 
 static struct list_head tpacpi_all_drivers;