/*
* linux / drivers / video / q40fb . c - - Q40 frame buffer device
*
* Copyright ( C ) 2001
*
* Richard Zidlicky < rz @ linux - m68k . org >
*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file COPYING in the main directory of this archive for
* more details .
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <asm /setup.h>
#include <asm /q40_master.h>
#include <linux/fb.h>
#include <linux/module.h>
#define Q40_PHYS_SCREEN_ADDR 0 xFE800000
static struct fb_fix_screeninfo q40fb_fix = {
.id = "Q40" ,
.smem_len = 1024 *1024 ,
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.line_length = 1024 *2 ,
.accel = FB_ACCEL_NONE,
};
static const struct fb_var_screeninfo q40fb_var = {
.xres = 1024 ,
.yres = 512 ,
.xres_virtual = 1024 ,
.yres_virtual = 512 ,
.bits_per_pixel = 16 ,
.red = {6 , 5 , 0 },
.green = {11 , 5 , 0 },
.blue = {0 , 6 , 0 },
.activate = FB_ACTIVATE_NOW,
.height = 230 ,
.width = 300 ,
.vmode = FB_VMODE_NONINTERLACED,
};
static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
/*
* Set a single color register . The values supplied have a 16 bit
* magnitude .
* Return ! = 0 for invalid regno .
*/
if (regno > 255 )
return 1 ;
red>>=11 ;
green>>=11 ;
blue>>=10 ;
if (regno < 16 ) {
((u32 *)info->pseudo_palette)[regno] = ((red & 31 ) <<6 ) |
((green & 31 ) << 11 ) |
(blue & 63 );
}
return 0 ;
}
static const struct fb_ops q40fb_ops = {
.owner = THIS_MODULE,
FB_DEFAULT_IOMEM_OPS,
.fb_setcolreg = q40fb_setcolreg,
};
static int q40fb_probe(struct platform_device *dev)
{
struct fb_info *info;
if (!MACH_IS_Q40)
return -ENXIO;
/* mapped in q40/config.c */
q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR;
info = framebuffer_alloc(sizeof (u32) * 16 , &dev->dev);
if (!info)
return -ENOMEM;
info->var = q40fb_var;
info->fix = q40fb_fix;
info->fbops = &q40fb_ops;
info->pseudo_palette = info->par;
info->par = NULL;
info->screen_base = (char *) q40fb_fix.smem_start;
if (fb_alloc_cmap(&info->cmap, 256 , 0 ) < 0 ) {
framebuffer_release(info);
return -ENOMEM;
}
master_outb(3 , DISPLAY_CONTROL_REG);
if (register_framebuffer(info) < 0 ) {
printk(KERN_ERR "Unable to register Q40 frame buffer\n" );
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
return -EINVAL;
}
fb_info(info, "Q40 frame buffer alive and kicking !\n" );
return 0 ;
}
static struct platform_driver q40fb_driver = {
.probe = q40fb_probe,
.driver = {
.name = "q40fb" ,
},
};
static struct platform_device q40fb_device = {
.name = "q40fb" ,
};
static int __init q40fb_init(void )
{
int ret = 0 ;
if (fb_get_options("q40fb" , NULL))
return -ENODEV;
ret = platform_driver_register(&q40fb_driver);
if (!ret) {
ret = platform_device_register(&q40fb_device);
if (ret)
platform_driver_unregister(&q40fb_driver);
}
return ret;
}
module_init(q40fb_init);
MODULE_LICENSE("GPL" );
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