Skip to content

Commit

Permalink
eeepc-laptop: Use standard interfaces
Browse files Browse the repository at this point in the history 
eeepc-laptop currently only sends key events via ACPI and has
non-standard rfkill control. Add an input device and use the rfkill
infrastructure.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
  • Loading branch information
Matthew Garrett authored and Len Brown committed Oct 10, 2008
1 parent 3fa8749 commit a195dcd
Showing 1 changed file with 209 additions and 19 deletions.
228 changes: 209 additions & 19 deletions drivers/misc/eeepc-laptop.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,8 @@
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <linux/uaccess.h>
#include <linux/input.h>
#include <linux/rfkill.h>

#define EEEPC_LAPTOP_VERSION "0.1"

Expand Down Expand Up @@ -125,6 +127,10 @@ struct eeepc_hotk {
by this BIOS */
uint init_flag; /* Init flags */
u16 event_count[128]; /* count for each event */
struct input_dev *inputdev;
u16 *keycode_map;
struct rfkill *eeepc_wlan_rfkill;
struct rfkill *eeepc_bluetooth_rfkill;
};

/* The actual device the driver binds to */
Expand All @@ -140,6 +146,27 @@ static struct platform_driver platform_driver = {

static struct platform_device *platform_device;

struct key_entry {
char type;
u8 code;
u16 keycode;
};

enum { KE_KEY, KE_END };

static struct key_entry eeepc_keymap[] = {
/* Sleep already handled via generic ACPI code */
{KE_KEY, 0x10, KEY_WLAN },
{KE_KEY, 0x12, KEY_PROG1 },
{KE_KEY, 0x13, KEY_MUTE },
{KE_KEY, 0x14, KEY_VOLUMEDOWN },
{KE_KEY, 0x15, KEY_VOLUMEUP },
{KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
{KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
{KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
{KE_END, 0},
};

/*
* The hotkey driver declaration
*/
Expand Down Expand Up @@ -260,6 +287,44 @@ static int update_bl_status(struct backlight_device *bd)
return set_brightness(bd, bd->props.brightness);
}

/*
* Rfkill helpers
*/

static int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
{
if (state == RFKILL_STATE_SOFT_BLOCKED)
return set_acpi(CM_ASL_WLAN, 0);
else
return set_acpi(CM_ASL_WLAN, 1);
}

static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
{
if (get_acpi(CM_ASL_WLAN) == 1)
*state = RFKILL_STATE_UNBLOCKED;
else
*state = RFKILL_STATE_SOFT_BLOCKED;
return 0;
}

static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
{
if (state == RFKILL_STATE_SOFT_BLOCKED)
return set_acpi(CM_ASL_BLUETOOTH, 0);
else
return set_acpi(CM_ASL_BLUETOOTH, 1);
}

static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
{
if (get_acpi(CM_ASL_BLUETOOTH) == 1)
*state = RFKILL_STATE_UNBLOCKED;
else
*state = RFKILL_STATE_SOFT_BLOCKED;
return 0;
}

/*
* Sys helpers
*/
Expand Down Expand Up @@ -311,13 +376,11 @@ static ssize_t show_sys_acpi(int cm, char *buf)
EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
EEEPC_CREATE_DEVICE_ATTR(wlan, CM_ASL_WLAN);

static struct attribute *platform_attributes[] = {
&dev_attr_camera.attr,
&dev_attr_cardr.attr,
&dev_attr_disp.attr,
&dev_attr_wlan.attr,
NULL
};

Expand All @@ -328,8 +391,64 @@ static struct attribute_group platform_attribute_group = {
/*
* Hotkey functions
*/
static struct key_entry *eepc_get_entry_by_scancode(int code)
{
struct key_entry *key;

for (key = eeepc_keymap; key->type != KE_END; key++)
if (code == key->code)
return key;

return NULL;
}

static struct key_entry *eepc_get_entry_by_keycode(int code)
{
struct key_entry *key;

for (key = eeepc_keymap; key->type != KE_END; key++)
if (code == key->keycode && key->type == KE_KEY)
return key;

return NULL;
}

static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
{
struct key_entry *key = eepc_get_entry_by_scancode(scancode);

if (key && key->type == KE_KEY) {
*keycode = key->keycode;
return 0;
}

return -EINVAL;
}

static int eeepc_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 = eepc_get_entry_by_scancode(scancode);
if (key && key->type == KE_KEY) {
old_keycode = key->keycode;
key->keycode = keycode;
set_bit(keycode, dev->keybit);
if (!eepc_get_entry_by_keycode(old_keycode))
clear_bit(old_keycode, dev->keybit);
return 0;
}

return -EINVAL;
}

static int eeepc_hotk_check(void)
{
const struct key_entry *key;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
int result;

Expand All @@ -356,28 +475,38 @@ static int eeepc_hotk_check(void)
"Get control methods supported: 0x%x\n",
ehotk->cm_supported);
}
ehotk->inputdev = input_allocate_device();
if (!ehotk->inputdev) {
printk(EEEPC_INFO "Unable to allocate input device\n");
return 0;
}
ehotk->inputdev->name = "Asus EeePC extra buttons";
ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
ehotk->inputdev->id.bustype = BUS_HOST;
ehotk->inputdev->getkeycode = eeepc_getkeycode;
ehotk->inputdev->setkeycode = eeepc_setkeycode;

for (key = eeepc_keymap; key->type != KE_END; key++) {
switch (key->type) {
case KE_KEY:
set_bit(EV_KEY, ehotk->inputdev->evbit);
set_bit(key->keycode, ehotk->inputdev->keybit);
break;
}
}
result = input_register_device(ehotk->inputdev);
if (result) {
printk(EEEPC_INFO "Unable to register input device\n");
input_free_device(ehotk->inputdev);
return 0;
}
} else {
printk(EEEPC_ERR "Hotkey device not present, aborting\n");
return -EINVAL;
}
return 0;
}

static void notify_wlan(u32 *event)
{
/* if DISABLE_ASL_WLAN is set, the notify code for fn+f2
will always be 0x10 */
if (ehotk->cm_supported & (0x1 << CM_ASL_WLAN)) {
const char *method = cm_getv[CM_ASL_WLAN];
int value;
if (read_acpi_int(ehotk->handle, method, &value))
printk(EEEPC_WARNING "Error reading %s\n",
method);
else if (value == 1)
*event = 0x11;
}
}

static void notify_brn(void)
{
struct backlight_device *bd = eeepc_backlight_device;
Expand All @@ -386,14 +515,28 @@ static void notify_brn(void)

static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
{
static struct key_entry *key;
if (!ehotk)
return;
if (event == NOTIFY_WLAN_ON && (DISABLE_ASL_WLAN & ehotk->init_flag))
notify_wlan(&event);
if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
notify_brn();
acpi_bus_generate_proc_event(ehotk->device, event,
ehotk->event_count[event % 128]++);
if (ehotk->inputdev) {
key = eepc_get_entry_by_scancode(event);
if (key) {
switch (key->type) {
case KE_KEY:
input_report_key(ehotk->inputdev, key->keycode,
1);
input_sync(ehotk->inputdev);
input_report_key(ehotk->inputdev, key->keycode,
0);
input_sync(ehotk->inputdev);
break;
}
}
}
}

static int eeepc_hotk_add(struct acpi_device *device)
Expand All @@ -420,6 +563,47 @@ static int eeepc_hotk_add(struct acpi_device *device)
eeepc_hotk_notify, ehotk);
if (ACPI_FAILURE(status))
printk(EEEPC_ERR "Error installing notify handler\n");

if (get_acpi(CM_ASL_WLAN) != -1) {
ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
RFKILL_TYPE_WLAN);

if (!ehotk->eeepc_wlan_rfkill)
goto end;

ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
if (get_acpi(CM_ASL_WLAN) == 1)
ehotk->eeepc_wlan_rfkill->state =
RFKILL_STATE_UNBLOCKED;
else
ehotk->eeepc_wlan_rfkill->state =
RFKILL_STATE_SOFT_BLOCKED;
rfkill_register(ehotk->eeepc_wlan_rfkill);
}

if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
ehotk->eeepc_bluetooth_rfkill =
rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);

if (!ehotk->eeepc_bluetooth_rfkill)
goto end;

ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
ehotk->eeepc_bluetooth_rfkill->toggle_radio =
eeepc_bluetooth_rfkill_set;
ehotk->eeepc_bluetooth_rfkill->get_state =
eeepc_bluetooth_rfkill_state;
if (get_acpi(CM_ASL_BLUETOOTH) == 1)
ehotk->eeepc_bluetooth_rfkill->state =
RFKILL_STATE_UNBLOCKED;
else
ehotk->eeepc_bluetooth_rfkill->state =
RFKILL_STATE_SOFT_BLOCKED;
rfkill_register(ehotk->eeepc_bluetooth_rfkill);
}

end:
if (result) {
kfree(ehotk);
Expand Down Expand Up @@ -553,6 +737,12 @@ static void eeepc_backlight_exit(void)
{
if (eeepc_backlight_device)
backlight_device_unregister(eeepc_backlight_device);
if (ehotk->inputdev)
input_unregister_device(ehotk->inputdev);
if (ehotk->eeepc_wlan_rfkill)
rfkill_unregister(ehotk->eeepc_wlan_rfkill);
if (ehotk->eeepc_bluetooth_rfkill)
rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
eeepc_backlight_device = NULL;
}

Expand Down

0 comments on commit a195dcd

Please sign in to comment.