AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-21 13:33:24 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
12f336c880
linux_dsm_epyc7002/drivers/media/v4l2-core/v4l2-flash-led-class.c
Kees Cook a86854d0c5 treewide: devm_kzalloc() -> devm_kcalloc() 
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:

        devm_kzalloc(handle, a * b, gfp)

with:
        devm_kcalloc(handle, a * b, gfp)

as well as handling cases of:

        devm_kzalloc(handle, a * b * c, gfp)

with:

        devm_kzalloc(handle, array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        devm_kcalloc(handle, array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        devm_kzalloc(handle, 4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@

(
  devm_kzalloc(HANDLE,
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  devm_kzalloc(HANDLE,
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@

- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@

(
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
  devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * E2
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

712 lines
20 KiB
C
Raw Blame History

/*
* V4L2 flash LED sub-device registration helpers.
*
* Copyright (C) 2015 Samsung Electronics Co., Ltd
* Author: Jacek Anaszewski <j.anaszewski@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/led-class-flash.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <media/v4l2-flash-led-class.h>
#define has_flash_op(v4l2_flash, op) \
(v4l2_flash && v4l2_flash->ops && v4l2_flash->ops->op)
#define call_flash_op(v4l2_flash, op, arg) \
(has_flash_op(v4l2_flash, op) ? \
v4l2_flash->ops->op(v4l2_flash, arg) : \
-EINVAL)
enum ctrl_init_data_id {
LED_MODE,
TORCH_INTENSITY,
FLASH_INTENSITY,
INDICATOR_INTENSITY,
FLASH_TIMEOUT,
STROBE_SOURCE,
/*
* Only above values are applicable to
* the 'ctrls' array in the struct v4l2_flash.
*/
FLASH_STROBE,
STROBE_STOP,
STROBE_STATUS,
FLASH_FAULT,
NUM_FLASH_CTRLS,
};
static enum led_brightness __intensity_to_led_brightness(
struct v4l2_ctrl *ctrl, s32 intensity)
{
intensity -= ctrl->minimum;
intensity /= (u32) ctrl->step;
/*
* Indicator LEDs, unlike torch LEDs, are turned on/off basing on
* the state of V4L2_CID_FLASH_INDICATOR_INTENSITY control only.
* Therefore it must be possible to set it to 0 level which in
* the LED subsystem reflects LED_OFF state.
*/
if (ctrl->minimum)
++intensity;
return intensity;
}
static s32 __led_brightness_to_intensity(struct v4l2_ctrl *ctrl,
enum led_brightness brightness)
{
/*
* Indicator LEDs, unlike torch LEDs, are turned on/off basing on
* the state of V4L2_CID_FLASH_INDICATOR_INTENSITY control only.
* Do not decrement brightness read from the LED subsystem for
* indicator LED as it may equal 0. For torch LEDs this function
* is called only when V4L2_FLASH_LED_MODE_TORCH is set and the
* brightness read is guaranteed to be greater than 0. In the mode
* V4L2_FLASH_LED_MODE_NONE the cached torch intensity value is used.
*/
if (ctrl->id != V4L2_CID_FLASH_INDICATOR_INTENSITY)
--brightness;
return (brightness * ctrl->step) + ctrl->minimum;
}
static void v4l2_flash_set_led_brightness(struct v4l2_flash *v4l2_flash,
struct v4l2_ctrl *ctrl)
{
struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
enum led_brightness brightness;
if (has_flash_op(v4l2_flash, intensity_to_led_brightness))
brightness = call_flash_op(v4l2_flash,
intensity_to_led_brightness,
ctrl->val);
else
brightness = __intensity_to_led_brightness(ctrl, ctrl->val);
/*
* In case a LED Flash class driver provides ops for custom
* brightness <-> intensity conversion, it also must have defined
* related v4l2 control step == 1. In such a case a backward conversion
* from led brightness to v4l2 intensity is required to find out the
* the aligned intensity value.
*/
if (has_flash_op(v4l2_flash, led_brightness_to_intensity))
ctrl->val = call_flash_op(v4l2_flash,
led_brightness_to_intensity,
brightness);
if (ctrl == ctrls[TORCH_INTENSITY]) {
if (ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_TORCH)
return;
led_set_brightness_sync(&v4l2_flash->fled_cdev->led_cdev,
brightness);
} else {
led_set_brightness_sync(v4l2_flash->iled_cdev,
brightness);
}
}
static int v4l2_flash_update_led_brightness(struct v4l2_flash *v4l2_flash,
struct v4l2_ctrl *ctrl)
{
struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
struct led_classdev *led_cdev;
int ret;
if (ctrl == ctrls[TORCH_INTENSITY]) {
/*
* Update torch brightness only if in TORCH_MODE. In other modes
* torch led is turned off, which would spuriously inform the
* user space that V4L2_CID_FLASH_TORCH_INTENSITY control value
* has changed to 0.
*/
if (ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_TORCH)
return 0;
led_cdev = &v4l2_flash->fled_cdev->led_cdev;
} else {
led_cdev = v4l2_flash->iled_cdev;
}
ret = led_update_brightness(led_cdev);
if (ret < 0)
return ret;
if (has_flash_op(v4l2_flash, led_brightness_to_intensity))
ctrl->val = call_flash_op(v4l2_flash,
led_brightness_to_intensity,
led_cdev->brightness);
else
ctrl->val = __led_brightness_to_intensity(ctrl,
led_cdev->brightness);
return 0;
}
static int v4l2_flash_g_volatile_ctrl(struct v4l2_ctrl *c)
{
struct v4l2_flash *v4l2_flash = v4l2_ctrl_to_v4l2_flash(c);
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
bool is_strobing;
int ret;
switch (c->id) {
case V4L2_CID_FLASH_TORCH_INTENSITY:
case V4L2_CID_FLASH_INDICATOR_INTENSITY:
return v4l2_flash_update_led_brightness(v4l2_flash, c);
case V4L2_CID_FLASH_INTENSITY:
ret = led_update_flash_brightness(fled_cdev);
if (ret < 0)
return ret;
/*
* No conversion is needed as LED Flash class also uses
* microamperes for flash intensity units.
*/
c->val = fled_cdev->brightness.val;
return 0;
case V4L2_CID_FLASH_STROBE_STATUS:
ret = led_get_flash_strobe(fled_cdev, &is_strobing);
if (ret < 0)
return ret;
c->val = is_strobing;
return 0;
case V4L2_CID_FLASH_FAULT:
/* LED faults map directly to V4L2 flash faults */
return led_get_flash_fault(fled_cdev, &c->val);
default:
return -EINVAL;
}
}
static bool __software_strobe_mode_inactive(struct v4l2_ctrl **ctrls)
{
return ((ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_FLASH) ||
(ctrls[STROBE_SOURCE] && (ctrls[STROBE_SOURCE]->val !=
V4L2_FLASH_STROBE_SOURCE_SOFTWARE)));
}
static int v4l2_flash_s_ctrl(struct v4l2_ctrl *c)
{
struct v4l2_flash *v4l2_flash = v4l2_ctrl_to_v4l2_flash(c);
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct led_classdev *led_cdev = fled_cdev ? &fled_cdev->led_cdev : NULL;
struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
bool external_strobe;
int ret = 0;
switch (c->id) {
case V4L2_CID_FLASH_LED_MODE:
switch (c->val) {
case V4L2_FLASH_LED_MODE_NONE:
led_set_brightness_sync(led_cdev, LED_OFF);
return led_set_flash_strobe(fled_cdev, false);
case V4L2_FLASH_LED_MODE_FLASH:
/* Turn the torch LED off */
led_set_brightness_sync(led_cdev, LED_OFF);
if (ctrls[STROBE_SOURCE]) {
external_strobe = (ctrls[STROBE_SOURCE]->val ==
V4L2_FLASH_STROBE_SOURCE_EXTERNAL);
ret = call_flash_op(v4l2_flash,
external_strobe_set,
external_strobe);
}
return ret;
case V4L2_FLASH_LED_MODE_TORCH:
if (ctrls[STROBE_SOURCE]) {
ret = call_flash_op(v4l2_flash,
external_strobe_set,
false);
if (ret < 0)
return ret;
}
/* Stop flash strobing */
ret = led_set_flash_strobe(fled_cdev, false);
if (ret < 0)
return ret;
v4l2_flash_set_led_brightness(v4l2_flash,
ctrls[TORCH_INTENSITY]);
return 0;
}
break;
case V4L2_CID_FLASH_STROBE_SOURCE:
external_strobe = (c->val == V4L2_FLASH_STROBE_SOURCE_EXTERNAL);
/*
* For some hardware arrangements setting strobe source may
* affect torch mode. Therefore, if not in the flash mode,
* cache only this setting. It will be applied upon switching
* to flash mode.
*/
if (ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_FLASH)
return 0;
return call_flash_op(v4l2_flash, external_strobe_set,
external_strobe);
case V4L2_CID_FLASH_STROBE:
if (__software_strobe_mode_inactive(ctrls))
return -EBUSY;
return led_set_flash_strobe(fled_cdev, true);
case V4L2_CID_FLASH_STROBE_STOP:
if (__software_strobe_mode_inactive(ctrls))
return -EBUSY;
return led_set_flash_strobe(fled_cdev, false);
case V4L2_CID_FLASH_TIMEOUT:
/*
* No conversion is needed as LED Flash class also uses
* microseconds for flash timeout units.
*/
return led_set_flash_timeout(fled_cdev, c->val);
case V4L2_CID_FLASH_INTENSITY:
/*
* No conversion is needed as LED Flash class also uses
* microamperes for flash intensity units.
*/
return led_set_flash_brightness(fled_cdev, c->val);
case V4L2_CID_FLASH_TORCH_INTENSITY:
case V4L2_CID_FLASH_INDICATOR_INTENSITY:
v4l2_flash_set_led_brightness(v4l2_flash, c);
return 0;
}
return -EINVAL;
}
static const struct v4l2_ctrl_ops v4l2_flash_ctrl_ops = {
.g_volatile_ctrl = v4l2_flash_g_volatile_ctrl,
.s_ctrl = v4l2_flash_s_ctrl,
};
static void __lfs_to_v4l2_ctrl_config(struct led_flash_setting *s,
struct v4l2_ctrl_config *c)
{
c->min = s->min;
c->max = s->max;
c->step = s->step;
c->def = s->val;
}
static void __fill_ctrl_init_data(struct v4l2_flash *v4l2_flash,
struct v4l2_flash_config *flash_cfg,
struct v4l2_flash_ctrl_data *ctrl_init_data)
{
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct led_classdev *led_cdev = fled_cdev ? &fled_cdev->led_cdev : NULL;
struct v4l2_ctrl_config *ctrl_cfg;
u32 mask;
/* Init INDICATOR_INTENSITY ctrl data */
if (v4l2_flash->iled_cdev) {
ctrl_init_data[INDICATOR_INTENSITY].cid =
V4L2_CID_FLASH_INDICATOR_INTENSITY;
ctrl_cfg = &ctrl_init_data[INDICATOR_INTENSITY].config;
__lfs_to_v4l2_ctrl_config(&flash_cfg->intensity,
ctrl_cfg);
ctrl_cfg->id = V4L2_CID_FLASH_INDICATOR_INTENSITY;
ctrl_cfg->min = 0;
ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
}
if (!led_cdev || WARN_ON(!(led_cdev->flags & LED_DEV_CAP_FLASH)))
return;
/* Init FLASH_FAULT ctrl data */
if (flash_cfg->flash_faults) {
ctrl_init_data[FLASH_FAULT].cid = V4L2_CID_FLASH_FAULT;
ctrl_cfg = &ctrl_init_data[FLASH_FAULT].config;
ctrl_cfg->id = V4L2_CID_FLASH_FAULT;
ctrl_cfg->max = flash_cfg->flash_faults;
ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_READ_ONLY;
}
/* Init FLASH_LED_MODE ctrl data */
mask = 1 << V4L2_FLASH_LED_MODE_NONE |
1 << V4L2_FLASH_LED_MODE_TORCH;
if (led_cdev->flags & LED_DEV_CAP_FLASH)
mask |= 1 << V4L2_FLASH_LED_MODE_FLASH;
ctrl_init_data[LED_MODE].cid = V4L2_CID_FLASH_LED_MODE;
ctrl_cfg = &ctrl_init_data[LED_MODE].config;
ctrl_cfg->id = V4L2_CID_FLASH_LED_MODE;
ctrl_cfg->max = V4L2_FLASH_LED_MODE_TORCH;
ctrl_cfg->menu_skip_mask = ~mask;
ctrl_cfg->def = V4L2_FLASH_LED_MODE_NONE;
ctrl_cfg->flags = 0;
/* Init TORCH_INTENSITY ctrl data */
ctrl_init_data[TORCH_INTENSITY].cid = V4L2_CID_FLASH_TORCH_INTENSITY;
ctrl_cfg = &ctrl_init_data[TORCH_INTENSITY].config;
__lfs_to_v4l2_ctrl_config(&flash_cfg->intensity, ctrl_cfg);
ctrl_cfg->id = V4L2_CID_FLASH_TORCH_INTENSITY;
ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
/* Init FLASH_STROBE ctrl data */
ctrl_init_data[FLASH_STROBE].cid = V4L2_CID_FLASH_STROBE;
ctrl_cfg = &ctrl_init_data[FLASH_STROBE].config;
ctrl_cfg->id = V4L2_CID_FLASH_STROBE;
/* Init STROBE_STOP ctrl data */
ctrl_init_data[STROBE_STOP].cid = V4L2_CID_FLASH_STROBE_STOP;
ctrl_cfg = &ctrl_init_data[STROBE_STOP].config;
ctrl_cfg->id = V4L2_CID_FLASH_STROBE_STOP;
/* Init FLASH_STROBE_SOURCE ctrl data */
if (flash_cfg->has_external_strobe) {
mask = (1 << V4L2_FLASH_STROBE_SOURCE_SOFTWARE) |
(1 << V4L2_FLASH_STROBE_SOURCE_EXTERNAL);
ctrl_init_data[STROBE_SOURCE].cid =
V4L2_CID_FLASH_STROBE_SOURCE;
ctrl_cfg = &ctrl_init_data[STROBE_SOURCE].config;
ctrl_cfg->id = V4L2_CID_FLASH_STROBE_SOURCE;
ctrl_cfg->max = V4L2_FLASH_STROBE_SOURCE_EXTERNAL;
ctrl_cfg->menu_skip_mask = ~mask;
ctrl_cfg->def = V4L2_FLASH_STROBE_SOURCE_SOFTWARE;
}
/* Init STROBE_STATUS ctrl data */
if (has_flash_op(fled_cdev, strobe_get)) {
ctrl_init_data[STROBE_STATUS].cid =
V4L2_CID_FLASH_STROBE_STATUS;
ctrl_cfg = &ctrl_init_data[STROBE_STATUS].config;
ctrl_cfg->id = V4L2_CID_FLASH_STROBE_STATUS;
ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_READ_ONLY;
}
/* Init FLASH_TIMEOUT ctrl data */
if (has_flash_op(fled_cdev, timeout_set)) {
ctrl_init_data[FLASH_TIMEOUT].cid = V4L2_CID_FLASH_TIMEOUT;
ctrl_cfg = &ctrl_init_data[FLASH_TIMEOUT].config;
__lfs_to_v4l2_ctrl_config(&fled_cdev->timeout, ctrl_cfg);
ctrl_cfg->id = V4L2_CID_FLASH_TIMEOUT;
}
/* Init FLASH_INTENSITY ctrl data */
if (has_flash_op(fled_cdev, flash_brightness_set)) {
ctrl_init_data[FLASH_INTENSITY].cid = V4L2_CID_FLASH_INTENSITY;
ctrl_cfg = &ctrl_init_data[FLASH_INTENSITY].config;
__lfs_to_v4l2_ctrl_config(&fled_cdev->brightness, ctrl_cfg);
ctrl_cfg->id = V4L2_CID_FLASH_INTENSITY;
ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
}
}
static int v4l2_flash_init_controls(struct v4l2_flash *v4l2_flash,
struct v4l2_flash_config *flash_cfg)
{
struct v4l2_flash_ctrl_data *ctrl_init_data;
struct v4l2_ctrl *ctrl;
struct v4l2_ctrl_config *ctrl_cfg;
int i, ret, num_ctrls = 0;
v4l2_flash->ctrls = devm_kcalloc(v4l2_flash->sd.dev,
STROBE_SOURCE + 1,
sizeof(*v4l2_flash->ctrls),
GFP_KERNEL);
if (!v4l2_flash->ctrls)
return -ENOMEM;
/* allocate memory dynamically so as not to exceed stack frame size */
ctrl_init_data = kcalloc(NUM_FLASH_CTRLS, sizeof(*ctrl_init_data),
GFP_KERNEL);
if (!ctrl_init_data)
return -ENOMEM;
__fill_ctrl_init_data(v4l2_flash, flash_cfg, ctrl_init_data);
for (i = 0; i < NUM_FLASH_CTRLS; ++i)
if (ctrl_init_data[i].cid)
++num_ctrls;
v4l2_ctrl_handler_init(&v4l2_flash->hdl, num_ctrls);
for (i = 0; i < NUM_FLASH_CTRLS; ++i) {
ctrl_cfg = &ctrl_init_data[i].config;
if (!ctrl_init_data[i].cid)
continue;
if (ctrl_cfg->id == V4L2_CID_FLASH_LED_MODE ||
ctrl_cfg->id == V4L2_CID_FLASH_STROBE_SOURCE)
ctrl = v4l2_ctrl_new_std_menu(&v4l2_flash->hdl,
&v4l2_flash_ctrl_ops,
ctrl_cfg->id,
ctrl_cfg->max,
ctrl_cfg->menu_skip_mask,
ctrl_cfg->def);
else
ctrl = v4l2_ctrl_new_std(&v4l2_flash->hdl,
&v4l2_flash_ctrl_ops,
ctrl_cfg->id,
ctrl_cfg->min,
ctrl_cfg->max,
ctrl_cfg->step,
ctrl_cfg->def);
if (ctrl)
ctrl->flags |= ctrl_cfg->flags;
if (i <= STROBE_SOURCE)
v4l2_flash->ctrls[i] = ctrl;
}
kfree(ctrl_init_data);
if (v4l2_flash->hdl.error) {
ret = v4l2_flash->hdl.error;
goto error_free_handler;
}
v4l2_ctrl_handler_setup(&v4l2_flash->hdl);
v4l2_flash->sd.ctrl_handler = &v4l2_flash->hdl;
return 0;
error_free_handler:
v4l2_ctrl_handler_free(&v4l2_flash->hdl);
return ret;
}
static int __sync_device_with_v4l2_controls(struct v4l2_flash *v4l2_flash)
{
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
int ret = 0;
if (ctrls[TORCH_INTENSITY])
v4l2_flash_set_led_brightness(v4l2_flash,
ctrls[TORCH_INTENSITY]);
if (ctrls[INDICATOR_INTENSITY])
v4l2_flash_set_led_brightness(v4l2_flash,
ctrls[INDICATOR_INTENSITY]);
if (ctrls[FLASH_TIMEOUT]) {
ret = led_set_flash_timeout(fled_cdev,
ctrls[FLASH_TIMEOUT]->val);
if (ret < 0)
return ret;
}
if (ctrls[FLASH_INTENSITY]) {
ret = led_set_flash_brightness(fled_cdev,
ctrls[FLASH_INTENSITY]->val);
if (ret < 0)
return ret;
}
/*
* For some hardware arrangements setting strobe source may affect
* torch mode. Synchronize strobe source setting only if not in torch
* mode. For torch mode case it will get synchronized upon switching
* to flash mode.
*/
if (ctrls[STROBE_SOURCE] &&
ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_TORCH)
ret = call_flash_op(v4l2_flash, external_strobe_set,
ctrls[STROBE_SOURCE]->val);
return ret;
}
/*
* V4L2 subdev internal operations
*/
static int v4l2_flash_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_flash *v4l2_flash = v4l2_subdev_to_v4l2_flash(sd);
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct led_classdev *led_cdev = fled_cdev ? &fled_cdev->led_cdev : NULL;
struct led_classdev *led_cdev_ind = v4l2_flash->iled_cdev;
int ret = 0;
if (!v4l2_fh_is_singular(&fh->vfh))
return 0;
if (led_cdev) {
mutex_lock(&led_cdev->led_access);
led_sysfs_disable(led_cdev);
led_trigger_remove(led_cdev);
mutex_unlock(&led_cdev->led_access);
}
if (led_cdev_ind) {
mutex_lock(&led_cdev_ind->led_access);
led_sysfs_disable(led_cdev_ind);
led_trigger_remove(led_cdev_ind);
mutex_unlock(&led_cdev_ind->led_access);
}
ret = __sync_device_with_v4l2_controls(v4l2_flash);
if (ret < 0)
goto out_sync_device;
return 0;
out_sync_device:
if (led_cdev) {
mutex_lock(&led_cdev->led_access);
led_sysfs_enable(led_cdev);
mutex_unlock(&led_cdev->led_access);
}
if (led_cdev_ind) {
mutex_lock(&led_cdev_ind->led_access);
led_sysfs_enable(led_cdev_ind);
mutex_unlock(&led_cdev_ind->led_access);
}
return ret;
}
static int v4l2_flash_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_flash *v4l2_flash = v4l2_subdev_to_v4l2_flash(sd);
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct led_classdev *led_cdev = fled_cdev ? &fled_cdev->led_cdev : NULL;
struct led_classdev *led_cdev_ind = v4l2_flash->iled_cdev;
int ret = 0;
if (!v4l2_fh_is_singular(&fh->vfh))
return 0;
if (led_cdev) {
mutex_lock(&led_cdev->led_access);
if (v4l2_flash->ctrls[STROBE_SOURCE])
ret = v4l2_ctrl_s_ctrl(
v4l2_flash->ctrls[STROBE_SOURCE],
V4L2_FLASH_STROBE_SOURCE_SOFTWARE);
led_sysfs_enable(led_cdev);
mutex_unlock(&led_cdev->led_access);
}
if (led_cdev_ind) {
mutex_lock(&led_cdev_ind->led_access);
led_sysfs_enable(led_cdev_ind);
mutex_unlock(&led_cdev_ind->led_access);
}
return ret;
}
static const struct v4l2_subdev_internal_ops v4l2_flash_subdev_internal_ops = {
.open = v4l2_flash_open,
.close = v4l2_flash_close,
};
static const struct v4l2_subdev_ops v4l2_flash_subdev_ops;
static struct v4l2_flash *__v4l2_flash_init(
struct device *dev, struct fwnode_handle *fwn,
struct led_classdev_flash *fled_cdev, struct led_classdev *iled_cdev,
const struct v4l2_flash_ops *ops, struct v4l2_flash_config *config)
{
struct v4l2_flash *v4l2_flash;
struct v4l2_subdev *sd;
int ret;
if (!config)
return ERR_PTR(-EINVAL);
v4l2_flash = devm_kzalloc(dev, sizeof(*v4l2_flash), GFP_KERNEL);
if (!v4l2_flash)
return ERR_PTR(-ENOMEM);
sd = &v4l2_flash->sd;
v4l2_flash->fled_cdev = fled_cdev;
v4l2_flash->iled_cdev = iled_cdev;
v4l2_flash->ops = ops;
sd->dev = dev;
sd->fwnode = fwn ? fwn : dev_fwnode(dev);
v4l2_subdev_init(sd, &v4l2_flash_subdev_ops);
sd->internal_ops = &v4l2_flash_subdev_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
strlcpy(sd->name, config->dev_name, sizeof(sd->name));
ret = media_entity_pads_init(&sd->entity, 0, NULL);
if (ret < 0)
return ERR_PTR(ret);
sd->entity.function = MEDIA_ENT_F_FLASH;
ret = v4l2_flash_init_controls(v4l2_flash, config);
if (ret < 0)
goto err_init_controls;
fwnode_handle_get(sd->fwnode);
ret = v4l2_async_register_subdev(sd);
if (ret < 0)
goto err_async_register_sd;
return v4l2_flash;
err_async_register_sd:
fwnode_handle_put(sd->fwnode);
v4l2_ctrl_handler_free(sd->ctrl_handler);
err_init_controls:
media_entity_cleanup(&sd->entity);
return ERR_PTR(ret);
}
struct v4l2_flash *v4l2_flash_init(
struct device *dev, struct fwnode_handle *fwn,
struct led_classdev_flash *fled_cdev,
const struct v4l2_flash_ops *ops,
struct v4l2_flash_config *config)
{
return __v4l2_flash_init(dev, fwn, fled_cdev, NULL, ops, config);
}
EXPORT_SYMBOL_GPL(v4l2_flash_init);
struct v4l2_flash *v4l2_flash_indicator_init(
struct device *dev, struct fwnode_handle *fwn,
struct led_classdev *iled_cdev,
struct v4l2_flash_config *config)
{
return __v4l2_flash_init(dev, fwn, NULL, iled_cdev, NULL, config);
}
EXPORT_SYMBOL_GPL(v4l2_flash_indicator_init);
void v4l2_flash_release(struct v4l2_flash *v4l2_flash)
{
struct v4l2_subdev *sd;
if (IS_ERR_OR_NULL(v4l2_flash))
return;
sd = &v4l2_flash->sd;
v4l2_async_unregister_subdev(sd);
fwnode_handle_put(sd->fwnode);
v4l2_ctrl_handler_free(sd->ctrl_handler);
media_entity_cleanup(&sd->entity);
}
EXPORT_SYMBOL_GPL(v4l2_flash_release);
MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
MODULE_DESCRIPTION("V4L2 Flash sub-device helpers");
MODULE_LICENSE("GPL v2");
Reference in New Issue View Git Blame Copy Permalink