[PATCH 7/7] msi-wmi: switch to using input sparse keymap library

Anisse Astier
2009-12-10T13:18:19Z

Signed-off-by: Anisse Astier <anisse@astier.eu>
---
drivers/platform/x86/Kconfig | 1 +
drivers/platform/x86/msi-wmi.c | 134 ++++++++++------------------------------
2 files changed, 33 insertions(+), 102 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 98ec6bd..1f82d6d 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -369,6 +369,7 @@ config MSI_WMI
tristate "MSI WMI extras"
depends on ACPI_WMI
depends on INPUT
+ select INPUT_SPARSEKMAP
help
Say Y here if you want to support WMI-based hotkeys on MSI laptops.

diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
index 2c2afc1..e25b80c 100644
--- a/drivers/platform/x86/msi-wmi.c
+++ b/drivers/platform/x86/msi-wmi.c
@@ -21,9 +21,9 @@
*/

-
#include <linux/kernel.h>
#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
#include <linux/acpi.h>
#include <linux/backlight.h>

@@ -52,26 +52,15 @@ MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-6638:*");

#define dprintk(msg...) pr_debug(DRV_PFX msg)

-struct key_entry {
- char type; /* See KE_* below */
- u16 code;
- u16 keycode;
- ktime_t last_pressed;
-};
-
-/*
- * KE_KEY the only used key type, but keep this, others might also
- * show up in the future. Compare with hp-wmi.c
- */
-enum { KE_KEY, KE_END };
-
+#define KEYCODE_BASE 0xD0
static struct key_entry msi_wmi_keymap[] = {
- { KE_KEY, 0xd0, KEY_BRIGHTNESSUP, {0, } },
- { KE_KEY, 0xd1, KEY_BRIGHTNESSDOWN, {0, } },
- { KE_KEY, 0xd2, KEY_VOLUMEUP, {0, } },
- { KE_KEY, 0xd3, KEY_VOLUMEDOWN, {0, } },
+ { KE_KEY, KEYCODE_BASE, {KEY_BRIGHTNESSUP} },
+ { KE_KEY, KEYCODE_BASE + 1, {KEY_BRIGHTNESSDOWN} },
+ { KE_KEY, KEYCODE_BASE + 2, {KEY_VOLUMEUP} },
+ { KE_KEY, KEYCODE_BASE + 3, {KEY_VOLUMEDOWN} },
{ KE_END, 0}
};
+static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];

struct backlight_device *backlight;

@@ -158,61 +147,6 @@ static struct backlight_ops msi_backlight_ops = {
.update_status = bl_set_status,
};

-static struct key_entry *msi_wmi_get_entry_by_scancode(int code)
-{
- struct key_entry *key;
-
- for (key = msi_wmi_keymap; key->type != KE_END; key++)
- if (code == key->code)
- return key;
-
- return NULL;
-}
-
-static struct key_entry *msi_wmi_get_entry_by_keycode(int keycode)
-{
- struct key_entry *key;
-
- for (key = msi_wmi_keymap; key->type != KE_END; key++)
- if (key->type == KE_KEY && keycode == key->keycode)
- return key;
-
- return NULL;
-}
-
-static int msi_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
-{
- struct key_entry *key = msi_wmi_get_entry_by_scancode(scancode);
-
- if (key && key->type == KE_KEY) {
- *keycode = key->keycode;
- return 0;
- }
-
- return -EINVAL;
-}
-
-static int msi_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
-{
- struct key_entry *key;
- int old_keycode;
-
- if (keycode < 0 || keycode > KEY_MAX)
- return -EINVAL;
-
- key = msi_wmi_get_entry_by_scancode(scancode);
- if (key && key->type == KE_KEY) {
- old_keycode = key->keycode;
- key->keycode = keycode;
- set_bit(keycode, dev->keybit);
- if (!msi_wmi_get_entry_by_keycode(old_keycode))
- clear_bit(old_keycode, dev->keybit);
- return 0;
- }
-
- return -EINVAL;
-}
-
static void msi_wmi_notify(u32 value, void *context)
{
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -227,21 +161,22 @@ static void msi_wmi_notify(u32 value, void *context)
if (obj && obj->type == ACPI_TYPE_INTEGER) {
int eventcode = obj->integer.value;
dprintk("Eventcode: 0x%x\n", eventcode);
- key = msi_wmi_get_entry_by_scancode(eventcode);
+ key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
+ eventcode);
if (key) {
+ ktime_t diff;
cur = ktime_get_real();
+ diff = ktime_sub(cur, last_pressed[key->code -
+ KEYCODE_BASE]);
/* Ignore event if the same event happened in a 50 ms
timeframe -> Key press may result in 10-20 GPEs */
- if (ktime_to_us(ktime_sub(cur, key->last_pressed))
- < 1000 * 50) {
+ if (ktime_to_us(diff) < 1000 * 50) {
dprintk("Suppressed key event 0x%X - "
"Last press was %lld us ago\n",
- key->code,
- ktime_to_us(ktime_sub(cur,
- key->last_pressed)));
+ key->code, ktime_to_us(diff));
return;
}
- key->last_pressed = cur;
+ last_pressed[key->code - KEYCODE_BASE] = cur;

if (key->type == KE_KEY &&
/* Brightness is served via acpi video driver */
@@ -250,12 +185,8 @@ static void msi_wmi_notify(u32 value, void *context)
dprintk("Send key: 0x%X - "
"Input layer keycode: %d\n", key->code,
key->keycode);
- input_report_key(msi_wmi_input_dev,
- key->keycode, 1);
- input_sync(msi_wmi_input_dev);
- input_report_key(msi_wmi_input_dev,
- key->keycode, 0);
- input_sync(msi_wmi_input_dev);
+ sparse_keymap_report_entry(msi_wmi_input_dev,
+ key, 1, true);
}
} else
printk(KERN_INFO "Unknown key pressed - %x\n",
@@ -267,7 +198,6 @@ static void msi_wmi_notify(u32 value, void *context)

static int __init msi_wmi_input_setup(void)
{
- struct key_entry *key;
int err;

msi_wmi_input_dev = input_allocate_device();
@@ -277,26 +207,25 @@ static int __init msi_wmi_input_setup(void)
msi_wmi_input_dev->name = "MSI WMI hotkeys";
msi_wmi_input_dev->phys = "wmi/input0";
msi_wmi_input_dev->id.bustype = BUS_HOST;
- msi_wmi_input_dev->getkeycode = msi_wmi_getkeycode;
- msi_wmi_input_dev->setkeycode = msi_wmi_setkeycode;
-
- for (key = msi_wmi_keymap; key->type != KE_END; key++) {
- switch (key->type) {
- case KE_KEY:
- set_bit(EV_KEY, msi_wmi_input_dev->evbit);
- set_bit(key->keycode, msi_wmi_input_dev->keybit);
- break;
- }
- }
+
+ err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
+ if (err)
+ goto err_free_dev;

err = input_register_device(msi_wmi_input_dev);

- if (err) {
- input_free_device(msi_wmi_input_dev);
- return err;
- }
+ if (err)
+ goto err_free_keymap;
+
+ memset(last_pressed, 0, sizeof(last_pressed));

return 0;
+
+err_free_keymap:
+ sparse_keymap_free(msi_wmi_input_dev);
+err_free_dev:
+ input_free_device(msi_wmi_input_dev);
+ return err;
}

static int __init msi_wmi_init(void)
@@ -347,6 +276,7 @@ static void __exit msi_wmi_exit(void)
{
if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
+ sparse_keymap_free(msi_wmi_input_dev);
input_unregister_device(msi_wmi_input_dev);
backlight_device_unregister(backlight);
}
--
1.6.5.3