diff options
Diffstat (limited to 'drivers/staging/gma500/psb_bl.c')
| -rw-r--r-- | drivers/staging/gma500/psb_bl.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/drivers/staging/gma500/psb_bl.c b/drivers/staging/gma500/psb_bl.c deleted file mode 100644 index 5dffc71c5125..000000000000 --- a/drivers/staging/gma500/psb_bl.c +++ /dev/null @@ -1,227 +0,0 @@ -/* - * psb backlight interface - * - * Copyright (c) 2009, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * - * Authors: Eric Knopp - * - */ - -#include <linux/backlight.h> -#include <linux/version.h> -#include "psb_drv.h" -#include "psb_intel_reg.h" -#include "psb_intel_drv.h" -#include "psb_intel_bios.h" -#include "psb_powermgmt.h" - -#define MRST_BLC_MAX_PWM_REG_FREQ 0xFFFF -#define BLC_PWM_PRECISION_FACTOR 100 /* 10000000 */ -#define BLC_PWM_FREQ_CALC_CONSTANT 32 -#define MHz 1000000 -#define BRIGHTNESS_MIN_LEVEL 1 -#define BRIGHTNESS_MASK 0xFF -#define BLC_POLARITY_NORMAL 0 -#define BLC_POLARITY_INVERSE 1 -#define BLC_ADJUSTMENT_MAX 100 - -#define PSB_BLC_PWM_PRECISION_FACTOR 10 -#define PSB_BLC_MAX_PWM_REG_FREQ 0xFFFE -#define PSB_BLC_MIN_PWM_REG_FREQ 0x2 - -#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) -#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) - -static int psb_brightness; -static struct backlight_device *psb_backlight_device; -static u8 blc_brightnesscmd; -static u8 blc_pol; -static u8 blc_type; - -int psb_set_brightness(struct backlight_device *bd) -{ - struct drm_device *dev = bl_get_data(psb_backlight_device); - int level = bd->props.brightness; - - DRM_DEBUG_DRIVER("backlight level set to %d\n", level); - - /* Percentage 1-100% being valid */ - if (level < 1) - level = 1; - - psb_intel_lvds_set_brightness(dev, level); - psb_brightness = level; - return 0; -} - -int mrst_set_brightness(struct backlight_device *bd) -{ - struct drm_device *dev = bl_get_data(psb_backlight_device); - struct drm_psb_private *dev_priv = dev->dev_private; - int level = bd->props.brightness; - u32 blc_pwm_ctl; - u32 max_pwm_blc; - - DRM_DEBUG_DRIVER("backlight level set to %d\n", level); - - /* Percentage 1-100% being valid */ - if (level < 1) - level = 1; - - if (gma_power_begin(dev, 0)) { - /* Calculate and set the brightness value */ - max_pwm_blc = REG_READ(BLC_PWM_CTL) >> 16; - blc_pwm_ctl = level * max_pwm_blc / 100; - - /* Adjust the backlight level with the percent in - * dev_priv->blc_adj1; - */ - blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj1; - blc_pwm_ctl = blc_pwm_ctl / 100; - - /* Adjust the backlight level with the percent in - * dev_priv->blc_adj2; - */ - blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj2; - blc_pwm_ctl = blc_pwm_ctl / 100; - - if (blc_pol == BLC_POLARITY_INVERSE) - blc_pwm_ctl = max_pwm_blc - blc_pwm_ctl; - /* force PWM bit on */ - REG_WRITE(BLC_PWM_CTL2, (0x80000000 | REG_READ(BLC_PWM_CTL2))); - REG_WRITE(BLC_PWM_CTL, (max_pwm_blc << 16) | blc_pwm_ctl); - gma_power_end(dev); - } - psb_brightness = level; - return 0; -} - -int psb_get_brightness(struct backlight_device *bd) -{ - DRM_DEBUG_DRIVER("brightness = 0x%x\n", psb_brightness); - - /* return locally cached var instead of HW read (due to DPST etc.) */ - /* FIXME: ideally return actual value in case firmware fiddled with - it */ - return psb_brightness; -} - -static const struct backlight_ops psb_ops = { - .get_brightness = psb_get_brightness, - .update_status = psb_set_brightness, -}; - -static int device_backlight_init(struct drm_device *dev) -{ - struct drm_psb_private *dev_priv = dev->dev_private; - unsigned long core_clock; - /* u32 bl_max_freq; */ - /* unsigned long value; */ - u16 bl_max_freq; - uint32_t value; - uint32_t blc_pwm_precision_factor; - - if (IS_MRST(dev)) { - dev_priv->blc_adj1 = BLC_ADJUSTMENT_MAX; - dev_priv->blc_adj2 = BLC_ADJUSTMENT_MAX; - bl_max_freq = 256; - /* this needs to be set elsewhere */ - blc_pol = BLC_POLARITY_NORMAL; - blc_pwm_precision_factor = BLC_PWM_PRECISION_FACTOR; - } else { - /* get bl_max_freq and pol from dev_priv*/ - if (!dev_priv->lvds_bl) { - DRM_ERROR("Has no valid LVDS backlight info\n"); - return 1; - } - bl_max_freq = dev_priv->lvds_bl->freq; - blc_pol = dev_priv->lvds_bl->pol; - blc_pwm_precision_factor = PSB_BLC_PWM_PRECISION_FACTOR; - blc_brightnesscmd = dev_priv->lvds_bl->brightnesscmd; - blc_type = dev_priv->lvds_bl->type; - } - - core_clock = dev_priv->core_freq; - - value = (core_clock * MHz) / BLC_PWM_FREQ_CALC_CONSTANT; - value *= blc_pwm_precision_factor; - value /= bl_max_freq; - value /= blc_pwm_precision_factor; - - if (gma_power_begin(dev, false)) { - if (IS_MRST(dev)) { - if (value > (unsigned long long)MRST_BLC_MAX_PWM_REG_FREQ) - return 2; - else { - REG_WRITE(BLC_PWM_CTL2, - (0x80000000 | REG_READ(BLC_PWM_CTL2))); - REG_WRITE(BLC_PWM_CTL, value | (value << 16)); - } - } else { - if (value > (unsigned long long)PSB_BLC_MAX_PWM_REG_FREQ || - value < (unsigned long long)PSB_BLC_MIN_PWM_REG_FREQ) - return 2; - else { - value &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; - REG_WRITE(BLC_PWM_CTL, - (value << PSB_BACKLIGHT_PWM_CTL_SHIFT) | - (value)); - } - } - gma_power_end(dev); - } - return 0; -} - -int psb_backlight_init(struct drm_device *dev) -{ -#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE - int ret = 0; - - struct backlight_properties props; - memset(&props, 0, sizeof(struct backlight_properties)); - props.max_brightness = 100; - props.type = BACKLIGHT_PLATFORM; - - psb_backlight_device = backlight_device_register("psb-bl", NULL, - (void *)dev, &psb_ops, &props); - if (IS_ERR(psb_backlight_device)) - return PTR_ERR(psb_backlight_device); - - ret = device_backlight_init(dev); - if (ret < 0) - return ret; - - psb_backlight_device->props.brightness = 100; - psb_backlight_device->props.max_brightness = 100; - backlight_update_status(psb_backlight_device); -#endif - return 0; -} - -void psb_backlight_exit(void) -{ -#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE - psb_backlight_device->props.brightness = 0; - backlight_update_status(psb_backlight_device); - backlight_device_unregister(psb_backlight_device); -#endif -} - -struct backlight_device *psb_get_backlight_device(void) -{ - return psb_backlight_device; -} |