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Subject[PATCH 2/5] panasonic-laptop - switch to using sparse keymap library
Date
nstead of implementing its own version of keymap hanlding switch over to
using sparse keymap library.

Cc: Harald Welte <laforge@gnumonks.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

drivers/platform/x86/Kconfig | 1
drivers/platform/x86/panasonic-laptop.c | 172 +++++++++++--------------------
2 files changed, 62 insertions(+), 111 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 63d68e7..a99d226 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -171,6 +171,7 @@ config PANASONIC_LAPTOP
tristate "Panasonic Laptop Extras"
depends on INPUT && ACPI
depends on BACKLIGHT_CLASS_DEVICE
+ select INPUT_SPARSEKMAP
---help---
This driver adds support for access to backlight control and hotkeys
on Panasonic Let's Note laptops.
diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index ec01c3d..b3b9e04 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -128,6 +128,7 @@
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>


#ifndef ACPI_HOTKEY_COMPONENT
@@ -200,30 +201,29 @@ static struct acpi_driver acpi_pcc_driver = {
},
};

-#define KEYMAP_SIZE 11
-static const unsigned int initial_keymap[KEYMAP_SIZE] = {
- /* 0 */ KEY_RESERVED,
- /* 1 */ KEY_BRIGHTNESSDOWN,
- /* 2 */ KEY_BRIGHTNESSUP,
- /* 3 */ KEY_DISPLAYTOGGLE,
- /* 4 */ KEY_MUTE,
- /* 5 */ KEY_VOLUMEDOWN,
- /* 6 */ KEY_VOLUMEUP,
- /* 7 */ KEY_SLEEP,
- /* 8 */ KEY_PROG1, /* Change CPU boost */
- /* 9 */ KEY_BATTERY,
- /* 10 */ KEY_SUSPEND,
+static const struct key_entry panasonic_keymap[] = {
+ { KE_KEY, 0, { KEY_RESERVED } },
+ { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
+ { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
+ { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
+ { KE_KEY, 4, { KEY_MUTE } },
+ { KE_KEY, 5, { KEY_VOLUMEDOWN } },
+ { KE_KEY, 6, { KEY_VOLUMEUP } },
+ { KE_KEY, 7, { KEY_SLEEP } },
+ { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
+ { KE_KEY, 9, { KEY_BATTERY } },
+ { KE_KEY, 10, { KEY_SUSPEND } },
+ { KE_END, 0 }
};

struct pcc_acpi {
acpi_handle handle;
unsigned long num_sifr;
int sticky_mode;
- u32 *sinf;
+ u32 *sinf;
struct acpi_device *device;
struct input_dev *input_dev;
struct backlight_device *backlight;
- unsigned int keymap[KEYMAP_SIZE];
};

struct pcc_keyinput {
@@ -446,56 +446,10 @@ static struct attribute_group pcc_attr_group = {

/* hotkey input device driver */

-static int pcc_getkeycode(struct input_dev *dev,
- unsigned int scancode, unsigned int *keycode)
-{
- struct pcc_acpi *pcc = input_get_drvdata(dev);
-
- if (scancode >= ARRAY_SIZE(pcc->keymap))
- return -EINVAL;
-
- *keycode = pcc->keymap[scancode];
-
- return 0;
-}
-
-static int keymap_get_by_keycode(struct pcc_acpi *pcc, unsigned int keycode)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) {
- if (pcc->keymap[i] == keycode)
- return i+1;
- }
-
- return 0;
-}
-
-static int pcc_setkeycode(struct input_dev *dev,
- unsigned int scancode, unsigned int keycode)
-{
- struct pcc_acpi *pcc = input_get_drvdata(dev);
- int oldkeycode;
-
- if (scancode >= ARRAY_SIZE(pcc->keymap))
- return -EINVAL;
-
- oldkeycode = pcc->keymap[scancode];
- pcc->keymap[scancode] = keycode;
-
- set_bit(keycode, dev->keybit);
-
- if (!keymap_get_by_keycode(pcc, oldkeycode))
- clear_bit(oldkeycode, dev->keybit);
-
- return 0;
-}
-
static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
{
struct input_dev *hotk_input_dev = pcc->input_dev;
int rc;
- int key_code, hkey_num;
unsigned long long result;

rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
@@ -508,25 +462,10 @@ static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)

acpi_bus_generate_proc_event(pcc->device, HKEY_NOTIFY, result);

- hkey_num = result & 0xf;
-
- if (hkey_num < 0 || hkey_num >= ARRAY_SIZE(pcc->keymap)) {
+ if (!sparse_keymap_report_event(hotk_input_dev,
+ result & 0xf, result & 0x80, false))
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "hotkey number out of range: %d\n",
- hkey_num));
- return;
- }
-
- key_code = pcc->keymap[hkey_num];
-
- if (key_code != KEY_RESERVED) {
- int pushed = (result & 0x80) ? TRUE : FALSE;
-
- input_report_key(hotk_input_dev, key_code, pushed);
- input_sync(hotk_input_dev);
- }
-
- return;
+ "Unknown hotkey event: %d\n", result));
}

static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
@@ -545,40 +484,55 @@ static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)

static int acpi_pcc_init_input(struct pcc_acpi *pcc)
{
- int i, rc;
+ struct input_dev *input_dev;
+ int error;

- pcc->input_dev = input_allocate_device();
- if (!pcc->input_dev) {
+ input_dev = input_allocate_device();
+ if (!input_dev) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Couldn't allocate input device for hotkey"));
return -ENOMEM;
}

- pcc->input_dev->evbit[0] = BIT(EV_KEY);
-
- pcc->input_dev->name = ACPI_PCC_DRIVER_NAME;
- pcc->input_dev->phys = ACPI_PCC_INPUT_PHYS;
- pcc->input_dev->id.bustype = BUS_HOST;
- pcc->input_dev->id.vendor = 0x0001;
- pcc->input_dev->id.product = 0x0001;
- pcc->input_dev->id.version = 0x0100;
- pcc->input_dev->getkeycode = pcc_getkeycode;
- pcc->input_dev->setkeycode = pcc_setkeycode;
+ input_dev->name = ACPI_PCC_DRIVER_NAME;
+ input_dev->phys = ACPI_PCC_INPUT_PHYS;
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0x0001;
+ input_dev->id.product = 0x0001;
+ input_dev->id.version = 0x0100;

- /* load initial keymap */
- memcpy(pcc->keymap, initial_keymap, sizeof(pcc->keymap));
+ error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
+ if (error) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to setup input device keymap\n"));
+ goto err_free_dev;
+ }

- for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++)
- __set_bit(pcc->keymap[i], pcc->input_dev->keybit);
- __clear_bit(KEY_RESERVED, pcc->input_dev->keybit);
+ error = input_register_device(input_dev);
+ if (error) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to register input device\n"));
+ goto err_free_keymap;
+ }

- input_set_drvdata(pcc->input_dev, pcc);
+ pcc->input_dev = input_dev;
+ return 0;

- rc = input_register_device(pcc->input_dev);
- if (rc < 0)
- input_free_device(pcc->input_dev);
+ err_free_keymap:
+ sparse_keymap_free(input_dev);
+ err_free_dev:
+ input_free_device(input_dev);
+ return error;
+}

- return rc;
+static void acpi_pcc_destroy_input(struct pcc_acpi *pcc)
+{
+ sparse_keymap_free(pcc->input_dev);
+ input_unregister_device(pcc->input_dev);
+ /*
+ * No need to input_free_device() since core input API refcounts
+ * and free()s the device.
+ */
}

/* kernel module interface */
@@ -636,7 +590,7 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device)
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error installing keyinput handler\n"));
- goto out_hotkey;
+ goto out_sinf;
}

if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) {
@@ -651,7 +605,7 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device)
&pcc_backlight_ops, &props);
if (IS_ERR(pcc->backlight)) {
result = PTR_ERR(pcc->backlight);
- goto out_sinf;
+ goto out_input;
}

/* read the initial brightness setting from the hardware */
@@ -669,12 +623,10 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device)

out_backlight:
backlight_device_unregister(pcc->backlight);
+out_input:
+ acpi_pcc_destroy_input(pcc);
out_sinf:
kfree(pcc->sinf);
-out_input:
- input_unregister_device(pcc->input_dev);
- /* no need to input_free_device() since core input API refcount and
- * free()s the device */
out_hotkey:
kfree(pcc);

@@ -709,9 +661,7 @@ static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type)

backlight_device_unregister(pcc->backlight);

- input_unregister_device(pcc->input_dev);
- /* no need to input_free_device() since core input API refcount and
- * free()s the device */
+ acpi_pcc_destroy_input(pcc);

kfree(pcc->sinf);
kfree(pcc);


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