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/*
* lcd.c -- LCD brightness and on/off
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that 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.
*
* Written by Maciek Górniak <mago@acn.waw.pl>, 2002
* Modified by Soós Péter <sp@osb.hu>, 2002-2004
* Modified by Mathieu Bérard <mathieu.berard@crans.org>, 2006
*/
#include "omnibook.h"
#include <linux/err.h>
#ifdef CONFIG_OMNIBOOK_BACKLIGHT
#include <linux/backlight.h>
#endif
#include "hardware.h"
unsigned int omnibook_max_brightness;
#ifdef CONFIG_OMNIBOOK_BACKLIGHT
static struct backlight_device *omnibook_backlight_device;
static int omnibook_get_backlight(struct backlight_device *bd);
static int omnibook_set_backlight(struct backlight_device *bd);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
static struct backlight_ops omnibookbl_ops = {
#else /* 2.6.21 */
static struct backlight_properties omnibookbl_data = {
.owner = THIS_MODULE,
#endif /* 2.6.21 */
.get_brightness = omnibook_get_backlight,
.update_status = omnibook_set_backlight,
};
static int omnibook_get_backlight(struct backlight_device *bd)
{
int retval = 0;
struct omnibook_operation *io_op;
u8 brgt;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
io_op = bl_get_data(bd);
#else /* 2.6.23 */
io_op = class_get_devdata(&bd->class_dev);
#endif /* 2.6.23 */
retval = backend_byte_read(io_op, &brgt);
if (!retval)
retval = brgt;
return retval;
}
static int omnibook_set_backlight(struct backlight_device *bd)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
u8 intensity = bd->props.brightness;
#else /* 2.6.21 */
u8 intensity = bd->props->brightness;
#endif /* 2.6.21 */
struct omnibook_operation *io_op;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
io_op = bl_get_data(bd);
#else /* 2.6.23 */
io_op = class_get_devdata(&bd->class_dev);
#endif /* 2.6.23 */
return backend_byte_write(io_op, intensity);
}
#endif /* CONFIG_OMNIBOOK_BACKLIGHT */
static int omnibook_brightness_read(char *buffer, struct omnibook_operation *io_op)
{
int len = 0;
u8 brgt;
backend_byte_read(io_op, &brgt);
len +=
sprintf(buffer + len, "LCD brightness: %2d (max value: %d)\n", brgt,
omnibook_max_brightness);
return len;
}
static int omnibook_brightness_write(char *buffer, struct omnibook_operation *io_op)
{
unsigned int brgt = 0;
char *endp;
if (strncmp(buffer, "off", 3) == 0)
omnibook_lcd_blank(1);
else if (strncmp(buffer, "on", 2) == 0)
omnibook_lcd_blank(0);
else {
brgt = simple_strtoul(buffer, &endp, 10);
if ((endp == buffer) || (brgt > omnibook_max_brightness))
return -EINVAL;
else {
backend_byte_write(io_op, brgt);
#ifdef CONFIG_OMNIBOOK_BACKLIGHT
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
omnibook_backlight_device->props.brightness = brgt;
#else /* 2.6.21 */
omnibookbl_data.brightness = brgt;
#endif
#endif
}
}
return 0;
}
static int __init omnibook_brightness_init(struct omnibook_operation *io_op)
{
/*
* FIXME: What is exactly the max value for each model ?
* I know that it's 7 for the TSM30X, TSM70, TSM40 and TSA105
* and previous versions of this driver (wrongly) assumed it was 10 for
* all models.
*
* XE3GF
* TSM30X
* TSM70
* TSM40
* TSA105
* TSX205
*/
if (omnibook_ectype & (XE3GF | TSM70 | TSM30X | TSM40 | TSA105 | TSX205))
omnibook_max_brightness = 7;
else {
omnibook_max_brightness = 10;
printk(O_WARN "Assuming that LCD brightness is between 0 and %i,\n",
omnibook_max_brightness);
printk(O_WARN
"please contact http://sourceforge.net/projects/omnibook to confirm.\n");
}
#ifdef CONFIG_OMNIBOOK_BACKLIGHT
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
omnibook_backlight_device =
backlight_device_register(OMNIBOOK_MODULE_NAME, NULL, (void *)io_op, &omnibookbl_ops);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
omnibook_backlight_device =
backlight_device_register(OMNIBOOK_MODULE_NAME, NULL, (void *)io_op, &omnibookbl_data);
#else /* < 2.6.20 */
omnibook_backlight_device =
backlight_device_register(OMNIBOOK_MODULE_NAME, (void *)io_op, &omnibookbl_data);
#endif
if (IS_ERR(omnibook_backlight_device)) {
printk(O_ERR "Unable to register as backlight device.\n");
return -ENODEV;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
omnibook_backlight_device->props.max_brightness = omnibook_max_brightness;
backend_byte_read(io_op, (u8*) &omnibook_backlight_device->props.brightness);
#else /* < 2.6.21 */
omnibookbl_data.max_brightness = omnibook_max_brightness;
backend_byte_read(io_op, (u8*) &omnibookbl_data.brightness);
#endif
#endif /* CONFIG_OMNIBOOK_BACKLIGHT */
return 0;
}
static void __exit omnibook_brightness_cleanup(struct omnibook_operation *io_op)
{
#ifdef CONFIG_OMNIBOOK_BACKLIGHT
backlight_device_unregister(omnibook_backlight_device);
#endif
}
static struct omnibook_tbl lcd_table[] __initdata = {
{TSM70 | TSX205, {CDI, TSM70_LCD_READ, TSM70_LCD_WRITE, 0, 0, 0}},
{TSM40, {SMI, SMI_GET_LCD_BRIGHTNESS, SMI_SET_LCD_BRIGHTNESS, 0, 0, 0}},
{XE3GF | TSP10 | TSM70 | TSM30X, SIMPLE_BYTE(EC, XE3GF_BRTS, XE3GF_BRTS_MASK)},
{XE3GC, SIMPLE_BYTE(EC, XE3GC_BTVL, XE3GC_BTVL_MASK)},
{AMILOD, SIMPLE_BYTE(EC, AMILOD_CBRG, XE3GC_BTVL_MASK)},
{TSA105, SIMPLE_BYTE(EC, A105_BNDT, A105_BNDT_MASK)},
{0,}
};
static struct omnibook_feature __declared_feature lcd_driver = {
.name = "lcd",
.enabled = 1,
.read = omnibook_brightness_read,
.write = omnibook_brightness_write,
.init = omnibook_brightness_init,
.exit = omnibook_brightness_cleanup,
.ectypes = XE3GF | XE3GC | AMILOD | TSP10 | TSM70 | TSM30X | TSM40 | TSA105 | TSX205,
.tbl = lcd_table,
};
module_param_named(lcd, lcd_driver.enabled, int, S_IRUGO);
MODULE_PARM_DESC(lcd, "Use 0 to disable, 1 to enable to LCD brightness support");
/* End of file */
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