mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-25 03:55:09 +08:00
d8344e090c
We must not use any information in the passed var besides xoffset, yoffset and vmode as otherwise applications might abuse it. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
256 lines
6.8 KiB
C
256 lines
6.8 KiB
C
/* $Id: g364fb.c,v 1.3 1998/08/28 22:43:00 tsbogend Exp $
|
|
*
|
|
* linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device
|
|
*
|
|
* (C) 1998 Thomas Bogendoerfer
|
|
*
|
|
* This driver is based on tgafb.c
|
|
*
|
|
* Copyright (C) 1997 Geert Uytterhoeven
|
|
* Copyright (C) 1995 Jay Estabrook
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/console.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/init.h>
|
|
#include <asm/io.h>
|
|
#include <asm/jazz.h>
|
|
|
|
/*
|
|
* Various defines for the G364
|
|
*/
|
|
#define G364_MEM_BASE 0xe4400000
|
|
#define G364_PORT_BASE 0xe4000000
|
|
#define ID_REG 0xe4000000 /* Read only */
|
|
#define BOOT_REG 0xe4080000
|
|
#define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */
|
|
#define DISPLAY_REG 0xe4080118
|
|
#define VDISPLAY_REG 0xe4080150
|
|
#define MASK_REG 0xe4080200
|
|
#define CTLA_REG 0xe4080300
|
|
#define CURS_TOGGLE 0x800000
|
|
#define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */
|
|
#define DELAY_SAMPLE 0x080000
|
|
#define PORT_INTER 0x040000
|
|
#define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */
|
|
#define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */
|
|
#define TR_CYCLE_TOG 0x004000
|
|
#define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */
|
|
#define BLANK_OFF 0x000800
|
|
#define FORCE_BLANK 0x000400
|
|
#define BLK_FUN_SWTCH 0x000200
|
|
#define BLANK_IO 0x000100
|
|
#define BLANK_LEVEL 0x000080
|
|
#define A_VID_FORM 0x000040
|
|
#define D_SYNC_FORM 0x000020
|
|
#define FRAME_FLY_PAT 0x000010
|
|
#define OP_MODE 0x000008
|
|
#define INTL_STAND 0x000004
|
|
#define SCRN_FORM 0x000002
|
|
#define ENABLE_VTG 0x000001
|
|
#define TOP_REG 0xe4080400
|
|
#define CURS_PAL_REG 0xe4080508 /* to 0x080518 */
|
|
#define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */
|
|
#define CURS_POS_REG 0xe4080638
|
|
#define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */
|
|
#define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */
|
|
#define MON_ID_REG 0xe4100000 /* unused */
|
|
#define RESET_REG 0xe4180000 /* Write only */
|
|
|
|
static struct fb_info fb_info;
|
|
|
|
static struct fb_fix_screeninfo fb_fix __initdata = {
|
|
.id = "G364 8plane",
|
|
.smem_start = 0x40000000, /* physical address */
|
|
.type = FB_TYPE_PACKED_PIXELS,
|
|
.visual = FB_VISUAL_PSEUDOCOLOR,
|
|
.ypanstep = 1,
|
|
.accel = FB_ACCEL_NONE,
|
|
};
|
|
|
|
static struct fb_var_screeninfo fb_var __initdata = {
|
|
.bits_per_pixel = 8,
|
|
.red = { 0, 8, 0 },
|
|
.green = { 0, 8, 0 },
|
|
.blue = { 0, 8, 0 },
|
|
.activate = FB_ACTIVATE_NOW,
|
|
.height = -1,
|
|
.width = -1,
|
|
.pixclock = 39722,
|
|
.left_margin = 40,
|
|
.right_margin = 24,
|
|
.upper_margin = 32,
|
|
.lower_margin = 11,
|
|
.hsync_len = 96,
|
|
.vsync_len = 2,
|
|
.vmode = FB_VMODE_NONINTERLACED,
|
|
};
|
|
|
|
/*
|
|
* Interface used by the world
|
|
*/
|
|
int g364fb_init(void);
|
|
|
|
static int g364fb_pan_display(struct fb_var_screeninfo *var,
|
|
struct fb_info *info);
|
|
static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
|
|
u_int blue, u_int transp,
|
|
struct fb_info *info);
|
|
static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
|
|
static int g364fb_blank(int blank, struct fb_info *info);
|
|
|
|
static struct fb_ops g364fb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_setcolreg = g364fb_setcolreg,
|
|
.fb_pan_display = g364fb_pan_display,
|
|
.fb_blank = g364fb_blank,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
.fb_cursor = g364fb_cursor,
|
|
};
|
|
|
|
int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
|
|
{
|
|
|
|
switch (cursor->enable) {
|
|
case CM_ERASE:
|
|
*(unsigned int *) CTLA_REG |= CURS_TOGGLE;
|
|
break;
|
|
|
|
case CM_MOVE:
|
|
case CM_DRAW:
|
|
*(unsigned int *) CTLA_REG &= ~CURS_TOGGLE;
|
|
*(unsigned int *) CURS_POS_REG =
|
|
((x * fontwidth(p)) << 12) | ((y * fontheight(p)) -
|
|
info->var.yoffset);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Pan or Wrap the Display
|
|
*
|
|
* This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
|
|
*/
|
|
static int g364fb_pan_display(struct fb_var_screeninfo *var,
|
|
struct fb_info *info)
|
|
{
|
|
if (var->xoffset ||
|
|
var->yoffset + info->var.yres > info->var.yres_virtual)
|
|
return -EINVAL;
|
|
|
|
*(unsigned int *) TOP_REG = var->yoffset * info->var.xres;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Blank the display.
|
|
*/
|
|
static int g364fb_blank(int blank, struct fb_info *info)
|
|
{
|
|
if (blank)
|
|
*(unsigned int *) CTLA_REG |= FORCE_BLANK;
|
|
else
|
|
*(unsigned int *) CTLA_REG &= ~FORCE_BLANK;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set a single color register. Return != 0 for invalid regno.
|
|
*/
|
|
static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
|
|
u_int blue, u_int transp, struct fb_info *info)
|
|
{
|
|
volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG;
|
|
|
|
if (regno > 255)
|
|
return 1;
|
|
|
|
red >>= 8;
|
|
green >>= 8;
|
|
blue >>= 8;
|
|
|
|
ptr[regno << 1] = (red << 16) | (green << 8) | blue;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialisation
|
|
*/
|
|
int __init g364fb_init(void)
|
|
{
|
|
volatile unsigned int *pal_ptr =
|
|
(volatile unsigned int *) CLR_PAL_REG;
|
|
volatile unsigned int *curs_pal_ptr =
|
|
(volatile unsigned int *) CURS_PAL_REG;
|
|
int mem, i, j;
|
|
|
|
if (fb_get_options("g364fb", NULL))
|
|
return -ENODEV;
|
|
|
|
/* TBD: G364 detection */
|
|
|
|
/* get the resolution set by ARC console */
|
|
*(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG;
|
|
fb_var.xres =
|
|
(*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4;
|
|
fb_var.yres =
|
|
(*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2;
|
|
*(volatile unsigned int *) CTLA_REG |= ENABLE_VTG;
|
|
|
|
/* setup cursor */
|
|
curs_pal_ptr[0] |= 0x00ffffff;
|
|
curs_pal_ptr[2] |= 0x00ffffff;
|
|
curs_pal_ptr[4] |= 0x00ffffff;
|
|
|
|
/*
|
|
* first set the whole cursor to transparent
|
|
*/
|
|
for (i = 0; i < 512; i++)
|
|
*(unsigned short *) (CURS_PAT_REG + i * 8) = 0;
|
|
|
|
/*
|
|
* switch the last two lines to cursor palette 3
|
|
* we assume here, that FONTSIZE_X is 8
|
|
*/
|
|
*(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff;
|
|
*(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff;
|
|
fb_var.xres_virtual = fbvar.xres;
|
|
fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel;
|
|
fb_fix.smem_start = 0x40000000; /* physical address */
|
|
/* get size of video memory; this is special for the JAZZ hardware */
|
|
mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3;
|
|
fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024;
|
|
fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres;
|
|
|
|
fb_info.fbops = &g364fb_ops;
|
|
fb_info.screen_base = (char *) G364_MEM_BASE; /* virtual kernel address */
|
|
fb_info.var = fb_var;
|
|
fb_info.fix = fb_fix;
|
|
fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
|
|
|
|
fb_alloc_cmap(&fb_info.cmap, 255, 0);
|
|
|
|
if (register_framebuffer(&fb_info) < 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
module_init(g364fb_init);
|
|
MODULE_LICENSE("GPL");
|