655bfd7aeb
Convert the backlight and LCD classes from struct class_device to struct device since class_device is scheduled for removal. One nasty API break is the backlight power attribute has had to be renamed to bl_power and the LCD power attribute has had to be renamed to lcd_power since the original names clash with the core. I can't see a way around this. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
145 lines
3.4 KiB
C
145 lines
3.4 KiB
C
/*
|
|
* Backlight code for nVidia based graphic cards
|
|
*
|
|
* Copyright 2004 Antonino Daplas <adaplas@pol.net>
|
|
* Copyright (c) 2006 Michael Hanselmann <linux-kernel@hansmi.ch>
|
|
*
|
|
* 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/backlight.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/pci.h>
|
|
|
|
#ifdef CONFIG_PMAC_BACKLIGHT
|
|
#include <asm/backlight.h>
|
|
#endif
|
|
|
|
#include "nv_local.h"
|
|
#include "nv_type.h"
|
|
#include "nv_proto.h"
|
|
|
|
/* We do not have any information about which values are allowed, thus
|
|
* we used safe values.
|
|
*/
|
|
#define MIN_LEVEL 0x158
|
|
#define MAX_LEVEL 0x534
|
|
#define LEVEL_STEP ((MAX_LEVEL - MIN_LEVEL) / FB_BACKLIGHT_MAX)
|
|
|
|
static int nvidia_bl_get_level_brightness(struct nvidia_par *par,
|
|
int level)
|
|
{
|
|
struct fb_info *info = pci_get_drvdata(par->pci_dev);
|
|
int nlevel;
|
|
|
|
/* Get and convert the value */
|
|
/* No locking of bl_curve since we read a single value */
|
|
nlevel = MIN_LEVEL + info->bl_curve[level] * LEVEL_STEP;
|
|
|
|
if (nlevel < 0)
|
|
nlevel = 0;
|
|
else if (nlevel < MIN_LEVEL)
|
|
nlevel = MIN_LEVEL;
|
|
else if (nlevel > MAX_LEVEL)
|
|
nlevel = MAX_LEVEL;
|
|
|
|
return nlevel;
|
|
}
|
|
|
|
static int nvidia_bl_update_status(struct backlight_device *bd)
|
|
{
|
|
struct nvidia_par *par = bl_get_data(bd);
|
|
u32 tmp_pcrt, tmp_pmc, fpcontrol;
|
|
int level;
|
|
|
|
if (!par->FlatPanel)
|
|
return 0;
|
|
|
|
if (bd->props.power != FB_BLANK_UNBLANK ||
|
|
bd->props.fb_blank != FB_BLANK_UNBLANK)
|
|
level = 0;
|
|
else
|
|
level = bd->props.brightness;
|
|
|
|
tmp_pmc = NV_RD32(par->PMC, 0x10F0) & 0x0000FFFF;
|
|
tmp_pcrt = NV_RD32(par->PCRTC0, 0x081C) & 0xFFFFFFFC;
|
|
fpcontrol = NV_RD32(par->PRAMDAC, 0x0848) & 0xCFFFFFCC;
|
|
|
|
if (level > 0) {
|
|
tmp_pcrt |= 0x1;
|
|
tmp_pmc |= (1 << 31); /* backlight bit */
|
|
tmp_pmc |= nvidia_bl_get_level_brightness(par, level) << 16;
|
|
fpcontrol |= par->fpSyncs;
|
|
} else
|
|
fpcontrol |= 0x20000022;
|
|
|
|
NV_WR32(par->PCRTC0, 0x081C, tmp_pcrt);
|
|
NV_WR32(par->PMC, 0x10F0, tmp_pmc);
|
|
NV_WR32(par->PRAMDAC, 0x848, fpcontrol);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvidia_bl_get_brightness(struct backlight_device *bd)
|
|
{
|
|
return bd->props.brightness;
|
|
}
|
|
|
|
static struct backlight_ops nvidia_bl_ops = {
|
|
.get_brightness = nvidia_bl_get_brightness,
|
|
.update_status = nvidia_bl_update_status,
|
|
};
|
|
|
|
void nvidia_bl_init(struct nvidia_par *par)
|
|
{
|
|
struct fb_info *info = pci_get_drvdata(par->pci_dev);
|
|
struct backlight_device *bd;
|
|
char name[12];
|
|
|
|
if (!par->FlatPanel)
|
|
return;
|
|
|
|
#ifdef CONFIG_PMAC_BACKLIGHT
|
|
if (!machine_is(powermac) ||
|
|
!pmac_has_backlight_type("mnca"))
|
|
return;
|
|
#endif
|
|
|
|
snprintf(name, sizeof(name), "nvidiabl%d", info->node);
|
|
|
|
bd = backlight_device_register(name, info->dev, par, &nvidia_bl_ops);
|
|
if (IS_ERR(bd)) {
|
|
info->bl_dev = NULL;
|
|
printk(KERN_WARNING "nvidia: Backlight registration failed\n");
|
|
goto error;
|
|
}
|
|
|
|
info->bl_dev = bd;
|
|
fb_bl_default_curve(info, 0,
|
|
0x158 * FB_BACKLIGHT_MAX / MAX_LEVEL,
|
|
0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
|
|
|
|
bd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
|
|
bd->props.brightness = bd->props.max_brightness;
|
|
bd->props.power = FB_BLANK_UNBLANK;
|
|
backlight_update_status(bd);
|
|
|
|
printk("nvidia: Backlight initialized (%s)\n", name);
|
|
|
|
return;
|
|
|
|
error:
|
|
return;
|
|
}
|
|
|
|
void nvidia_bl_exit(struct nvidia_par *par)
|
|
{
|
|
struct fb_info *info = pci_get_drvdata(par->pci_dev);
|
|
struct backlight_device *bd = info->bl_dev;
|
|
|
|
backlight_device_unregister(bd);
|
|
printk("nvidia: Backlight unloaded\n");
|
|
}
|