/*
* 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/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/q40_master.h>
#include <linux/fb.h>
#include <linux/module.h>
#include <asm/pgtable.h>
#define Q40_PHYS_SCREEN_ADDR 0xFE800000
static struct fb_fix_screeninfo q40fb_fix __initdata = {
.id = "Q40",
.smem_len = 1024*1024,
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.line_length = 1024*2,
.accel = FB_ACCEL_NONE,
};
static struct fb_var_screeninfo q40fb_var __initdata = {
.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 struct fb_ops q40fb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = q40fb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static int __init q40fb_probe(struct device *device)
{
struct platform_device *dev = to_platform_device(device);
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) * 256, &dev->dev);
if (!info)
return -ENOMEM;
info->var = q40fb_var;
info->fix = q40fb_fix;
info->fbops = &q40fb_ops;
info->flags = FBINFO_DEFAULT; /* not as module for now */
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;
}
printk(KERN_INFO "fb%d: Q40 frame buffer alive and kicking !\n",
info->node);
return 0;
}
static struct device_driver q40fb_driver = {
.name = "q40fb",
.bus = &platform_bus_type,
.probe = q40fb_probe,
};
static struct platform_device q40fb_device = {
.name = "q40fb",
};
int __init q40fb_init(void)
{
int ret = 0;
if (fb_get_options("q40fb", NULL))
return -ENODEV;
ret = driver_register(&q40fb_driver);
if (!ret) {
ret = platform_device_register(&q40fb_device);
if (ret)
driver_unregister(&q40fb_driver);
}
return ret;
}
module_init(q40fb_init);
MODULE_LICENSE("GPL");
