ACPI: thinkpad-acpi: register input device

Henrique de Moraes Holschuh
2007-07-14T14:11:58Z

Register an input device to send input events to userspace.

This patch is based on a patch by Richard Hughes <hughsient-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>.

Signed-off-by: Henrique de Moraes Holschuh <hmh-N3TV7GIv+o9fyO9Q7EP/yw@public.gmane.org>
Cc: Richard Hughes <hughsient-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Dmitry Torokhov <dmitry.torokhov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
drivers/misc/thinkpad_acpi.c | 32 +++++++++++++++++++++++++++++++-
drivers/misc/thinkpad_acpi.h | 9 +++++++++
2 files changed, 40 insertions(+), 1 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 4d71893..4427c99 100644
--- 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
--- 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;
--
1.5.2.1