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Subject[PATCH 1/7] platform/x86: fujitsu-laptop: Define constants for FUNC operations
Date
Various functions exposed by the firmware through the FUNC interface
tend to use a consistent set of integers for denoting the type of
operation to be performed for a specified feature. Use named constants
instead of integers in each call_fext_func() invocation in order to more
clearly convey the intent of each call.

Note that FUNC_FLAGS is a bit peculiar:

- operations 0x4 (OP_GET_EXT) and 0x5 (OP_SET_EXT) are used for,
respectively, getting and setting feature states, instead of 0x2 and
0x1 used by other FUNC interfaces,

- operation 0x1 is used for retrieving events (OP_GET_EVENTS).

Signed-off-by: Michał Kępień <kernel@kempniu.pl>
---
drivers/platform/x86/fujitsu-laptop.c | 103 ++++++++++++++++++++--------------
1 file changed, 60 insertions(+), 43 deletions(-)

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 13bcdfea5349..74775caeb609 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -87,6 +87,14 @@
/* FUNC interface - responses */
#define UNSUPPORTED_CMD BIT(31)

+/* FUNC interface - operations */
+#define OP_GET BIT(1)
+#define OP_GET_CAPS 0
+#define OP_GET_EVENTS BIT(0)
+#define OP_GET_EXT BIT(2)
+#define OP_SET BIT(0)
+#define OP_SET_EXT (BIT(2) | BIT(0))
+
/* FUNC interface - status flags */
#define FLAG_RFKILL BIT(5)
#define FLAG_LID BIT(8)
@@ -264,10 +272,10 @@ static int bl_update_status(struct backlight_device *b)

if (fext) {
if (b->props.power == FB_BLANK_POWERDOWN)
- call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
+ call_fext_func(fext, FUNC_BACKLIGHT, OP_SET,
BACKLIGHT_PARAM_POWER, BACKLIGHT_OFF);
else
- call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
+ call_fext_func(fext, FUNC_BACKLIGHT, OP_SET,
BACKLIGHT_PARAM_POWER, BACKLIGHT_ON);
}

@@ -597,11 +605,13 @@ static int logolamp_set(struct led_classdev *cdev,
if (brightness < LED_FULL)
always = FUNC_LED_OFF;

- ret = call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
+ ret = call_fext_func(device, FUNC_LEDS, OP_SET,
+ LOGOLAMP_POWERON, poweron);
if (ret < 0)
return ret;

- return call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
+ return call_fext_func(device, FUNC_LEDS, OP_SET,
+ LOGOLAMP_ALWAYS, always);
}

static enum led_brightness logolamp_get(struct led_classdev *cdev)
@@ -609,11 +619,11 @@ static enum led_brightness logolamp_get(struct led_classdev *cdev)
struct acpi_device *device = to_acpi_device(cdev->dev->parent);
int ret;

- ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
+ ret = call_fext_func(device, FUNC_LEDS, OP_GET, LOGOLAMP_ALWAYS, 0x0);
if (ret == FUNC_LED_ON)
return LED_FULL;

- ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
+ ret = call_fext_func(device, FUNC_LEDS, OP_GET, LOGOLAMP_POWERON, 0x0);
if (ret == FUNC_LED_ON)
return LED_HALF;

@@ -626,11 +636,11 @@ static int kblamps_set(struct led_classdev *cdev,
struct acpi_device *device = to_acpi_device(cdev->dev->parent);

if (brightness >= LED_FULL)
- return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
- FUNC_LED_ON);
+ return call_fext_func(device, FUNC_LEDS, OP_SET,
+ KEYBOARD_LAMPS, FUNC_LED_ON);
else
- return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
- FUNC_LED_OFF);
+ return call_fext_func(device, FUNC_LEDS, OP_SET,
+ KEYBOARD_LAMPS, FUNC_LED_OFF);
}

static enum led_brightness kblamps_get(struct led_classdev *cdev)
@@ -638,8 +648,8 @@ static enum led_brightness kblamps_get(struct led_classdev *cdev)
struct acpi_device *device = to_acpi_device(cdev->dev->parent);
enum led_brightness brightness = LED_OFF;

- if (call_fext_func(device,
- FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
+ if (call_fext_func(device, FUNC_LEDS, OP_GET,
+ KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
brightness = LED_FULL;

return brightness;
@@ -651,11 +661,11 @@ static int radio_led_set(struct led_classdev *cdev,
struct acpi_device *device = to_acpi_device(cdev->dev->parent);

if (brightness >= LED_FULL)
- return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
- RADIO_LED_ON);
+ return call_fext_func(device, FUNC_FLAGS, OP_SET_EXT,
+ RADIO_LED_ON, RADIO_LED_ON);
else
- return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
- 0x0);
+ return call_fext_func(device, FUNC_FLAGS, OP_SET_EXT,
+ RADIO_LED_ON, 0x0);
}

static enum led_brightness radio_led_get(struct led_classdev *cdev)
@@ -663,7 +673,8 @@ static enum led_brightness radio_led_get(struct led_classdev *cdev)
struct acpi_device *device = to_acpi_device(cdev->dev->parent);
enum led_brightness brightness = LED_OFF;

- if (call_fext_func(device, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
+ if (call_fext_func(device, FUNC_FLAGS, OP_GET_EXT,
+ 0x0, 0x0) & RADIO_LED_ON)
brightness = LED_FULL;

return brightness;
@@ -675,13 +686,13 @@ static int eco_led_set(struct led_classdev *cdev,
struct acpi_device *device = to_acpi_device(cdev->dev->parent);
int curr;

- curr = call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0);
+ curr = call_fext_func(device, FUNC_LEDS, OP_GET, ECO_LED, 0x0);
if (brightness >= LED_FULL)
- return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
- curr | ECO_LED_ON);
+ return call_fext_func(device, FUNC_LEDS, OP_SET,
+ ECO_LED, curr | ECO_LED_ON);
else
- return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
- curr & ~ECO_LED_ON);
+ return call_fext_func(device, FUNC_LEDS, OP_SET,
+ ECO_LED, curr & ~ECO_LED_ON);
}

static enum led_brightness eco_led_get(struct led_classdev *cdev)
@@ -689,7 +700,8 @@ static enum led_brightness eco_led_get(struct led_classdev *cdev)
struct acpi_device *device = to_acpi_device(cdev->dev->parent);
enum led_brightness brightness = LED_OFF;

- if (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
+ if (call_fext_func(device, FUNC_LEDS, OP_GET,
+ ECO_LED, 0x0) & ECO_LED_ON)
brightness = LED_FULL;

return brightness;
@@ -701,8 +713,8 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
struct led_classdev *led;
int ret;

- if (call_fext_func(device,
- FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
+ if (call_fext_func(device, FUNC_LEDS, OP_GET_CAPS,
+ 0x0, 0x0) & LOGOLAMP_POWERON) {
led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
@@ -715,9 +727,10 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
return ret;
}

- if ((call_fext_func(device,
- FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
- (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
+ if ((call_fext_func(device, FUNC_LEDS, OP_GET_CAPS,
+ 0x0, 0x0) & KEYBOARD_LAMPS) &&
+ (call_fext_func(device, FUNC_BUTTONS, OP_GET_CAPS,
+ 0x0, 0x0) == 0x0)) {
led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
@@ -758,9 +771,10 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
* bit 14 seems to indicate presence of said led as well.
* Confirm by testing the status.
*/
- if ((call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
- (call_fext_func(device,
- FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
+ if ((call_fext_func(device, FUNC_LEDS, OP_GET_CAPS,
+ 0x0, 0x0) & BIT(14)) &&
+ (call_fext_func(device, FUNC_LEDS, OP_GET,
+ ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
@@ -802,14 +816,15 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
pr_info("ACPI: %s [%s]\n",
acpi_device_name(device), acpi_device_bid(device));

- while (call_fext_func(device, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0 &&
+ while (call_fext_func(device, FUNC_BUTTONS, OP_GET_EVENTS,
+ 0x0, 0x0) != 0 &&
i++ < MAX_HOTKEY_RINGBUFFER_SIZE)
; /* No action, result is discarded */
acpi_handle_debug(device->handle, "Discarded %i ringbuffer entries\n",
i);

- priv->flags_supported = call_fext_func(device, FUNC_FLAGS, 0x0, 0x0,
- 0x0);
+ priv->flags_supported = call_fext_func(device, FUNC_FLAGS, OP_GET_CAPS,
+ 0x0, 0x0);

/* Make sure our bitmask of supported functions is cleared if the
RFKILL function block is not implemented, like on the S7020. */
@@ -817,17 +832,18 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
priv->flags_supported = 0;

if (priv->flags_supported)
- priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
- 0x0);
+ priv->flags_state = call_fext_func(device, FUNC_FLAGS,
+ OP_GET_EXT, 0x0, 0x0);

/* Suspect this is a keymap of the application panel, print it */
acpi_handle_info(device->handle, "BTNI: [0x%x]\n",
- call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0));
+ call_fext_func(device, FUNC_BUTTONS, OP_GET_CAPS,
+ 0x0, 0x0));

/* Sync backlight power status */
if (fujitsu_bl && fujitsu_bl->bl_device &&
acpi_video_get_backlight_type() == acpi_backlight_vendor) {
- if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2,
+ if (call_fext_func(fext, FUNC_BACKLIGHT, OP_GET,
BACKLIGHT_PARAM_POWER, 0x0) == BACKLIGHT_OFF)
fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
else
@@ -912,11 +928,11 @@ static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
}

if (priv->flags_supported)
- priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
- 0x0);
+ priv->flags_state = call_fext_func(device, FUNC_FLAGS,
+ OP_GET_EXT, 0x0, 0x0);

- while ((irb = call_fext_func(device,
- FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
+ while ((irb = call_fext_func(device, FUNC_BUTTONS, OP_GET_EVENTS,
+ 0x0, 0x0)) != 0 &&
i++ < MAX_HOTKEY_RINGBUFFER_SIZE) {
scancode = irb & 0x4ff;
if (sparse_keymap_entry_from_scancode(priv->input, scancode))
@@ -933,7 +949,8 @@ static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
* handled in software; its state is queried using FUNC_FLAGS
*/
if ((priv->flags_supported & BIT(26)) &&
- (call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26)))
+ (call_fext_func(device, FUNC_FLAGS, OP_GET_EVENTS,
+ 0x0, 0x0) & BIT(26)))
sparse_keymap_report_event(priv->input, BIT(26), 1, true);
}

--
2.16.2
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