/*
* SGI GBE frame buffer driver
*
* Copyright (C) 1999 Silicon Graphics, Inc. - Jeffrey Newquist
* Copyright (C) 2002 Vivien Chappelier <vivien.chappelier@linux-mips.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/delay.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#ifdef CONFIG_X86
#include <asm/mtrr.h>
#endif
#ifdef CONFIG_MIPS
#include <asm/addrspace.h>
#endif
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/tlbflush.h>
#include <video/gbe.h>
static struct sgi_gbe *gbe;
struct gbefb_par {
struct fb_var_screeninfo var;
struct gbe_timing_info timing;
int valid;
};
#ifdef CONFIG_SGI_IP32
#define GBE_BASE 0x16000000 /* SGI O2 */
#endif
#ifdef CONFIG_X86_VISWS
#define GBE_BASE 0xd0000000 /* SGI Visual Workstation */
#endif
/* macro for fastest write-though access to the framebuffer */
#ifdef CONFIG_MIPS
#ifdef CONFIG_CPU_R10000
#define pgprot_fb(_prot) (((_prot) & (~_CACHE_MASK)) | _CACHE_UNCACHED_ACCELERATED)
#else
#define pgprot_fb(_prot) (((_prot) & (~_CACHE_MASK)) | _CACHE_CACHABLE_NO_WA)
#endif
#endif
#ifdef CONFIG_X86
#define pgprot_fb(_prot) ((_prot) | _PAGE_PCD)
#endif
/*
* RAM we reserve for the frame buffer. This defines the maximum screen
* size
*/
#if CONFIG_FB_GBE_MEM > 8
#error GBE Framebuffer cannot use more than 8MB of memory
#endif
#define TILE_SHIFT 16
#define TILE_SIZE (1 << TILE_SHIFT)
#define TILE_MASK (TILE_SIZE - 1)
static unsigned int gbe_mem_size = CONFIG_FB_GBE_MEM * 1024*1024;
static void *gbe_mem;
static dma_addr_t gbe_dma_addr;
unsigned long gbe_mem_phys;
static struct {
uint16_t *cpu;
dma_addr_t dma;
} gbe_tiles;
static int gbe_revision;
static int ypan, ywrap;
static uint32_t pseudo_palette[16];
static char *mode_option __initdata = NULL;
/* default CRT mode */
static struct fb_var_screeninfo default_var_CRT __initdata = {
/* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
.xres = 640,
.yres = 480,
.xres_virtual = 640,
.yres_virtual = 480,
.xoffset = 0,
.yoffset = 0,
.bits_per_pixel = 8,
.grayscale = 0,
.red = { 0, 8, 0 },
.green = { 0, 8, 0 },
.blue = { 0, 8, 0 },
.transp = { 0, 0, 0 },
.nonstd = 0,
.activate = 0,
.height = -1,
.width = -1,
.accel_flags = 0,
.pixclock = 39722, /* picoseconds */
