Yet another frame buffer driver updated to the new API. I don't know
the author's email address. Please test since I lack this hardware. It
does compile.
P.S.
All authors please leave your name and email address in your work. This
way someone can contact you. Thank you.
Q: Why did they deprecate a.out support in linux?
A: Because a nasty coff is bad for your elf.
James Simmons [jsimmons@linux-fbdev.org] ____/|
fbdev/gfx developer \ o.O|
http://www.linux-fbdev.org =(_)=
http://linuxgfx.sourceforge.net U
/* $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/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/malloc.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/selection.h>
#include <linux/console.h>
#include <asm/io.h>
#include <asm/jazz.h>
#include <video/fbcon.h>
#include <video/fbcon-cfb8.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 */
#define arraysize(x) (sizeof(x)/sizeof(*(x)))
static int currcon = 0;
static struct display disp;
static struct fb_info fb_info;
static struct fb_fix_screeninfo fb_fix __initdata = {
"G364 8plane", 0x40000000 /* physical address */, 0, FB_TYPE_PACKED_PIXELS,
0, FB_VISUAL_PSEUDOCOLOR, 0, 1, 0, 0, (unsigned long)NULL, 0, FB_ACCEL_NONE
};
static struct fb_var_screeninfo fb_var __initdata = {
0, 0, 0, 0, 0, 0, 8, 0,
{0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
0, FB_ACTIVATE_NOW, -1, -1, 0, 39722, 40, 24, 32, 11, 96, 2,
0, FB_VMODE_NONINTERLACED
};
/*
* Interface used by the world
*/
int g364fb_init(void);
static int g364fb_open(struct fb_info *info, int user);
static int g364fb_release(struct fb_info *info, int user);
static int g364fb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info);
static int g364fb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int g364fb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int g364fb_pan_display(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int g364fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
static int g364fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
static int g364fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
u_long arg, int con, struct fb_info *info);
/*
* Interface to the low level console driver
*/
static int g364fbcon_switch(int con, struct fb_info *info);
static int g364fbcon_updatevar(int con, struct fb_info *info);
static void g364fb_blank(int blank, struct fb_info *info);
/*
* Internal routines
*/
static int g364fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static struct fb_ops g364fb_ops = {
fb_open: g364fb_open,
fb_release: g364fb_release,
fb_get_fix: g364fb_get_fix,
fb_get_var: g364fb_get_var,
fb_set_var: g364fb_set_var,
fb_get_cmap: g364fb_get_cmap,
fb_set_cmap: g364fb_set_cmap,
fb_pan_display: g364fb_pan_display,
fb_ioctl: g364fb_ioctl
};
void fbcon_g364fb_cursor(struct display *p, int mode, int x, int y)
{
switch (mode) {
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)) - p->fb_info->var.yoffset);
break;
}
}
static struct display_switch fbcon_g364cfb8 = {
fbcon_cfb8_setup, fbcon_cfb8_bmove, fbcon_cfb8_clear, fbcon_cfb8_putc,
fbcon_cfb8_putcs, fbcon_cfb8_revc, fbcon_g364fb_cursor, NULL,
fbcon_cfb8_clear_margins, FONTWIDTH(8)
};
/*
* Open/Release the frame buffer device
*/
static int g364fb_open(struct fb_info *info, int user)
{
/*
* Nothing, only a usage count for the moment
*/
MOD_INC_USE_COUNT;
return(0);
}
static int g364fb_release(struct fb_info *info, int user)
{
MOD_DEC_USE_COUNT;
return(0);
}
/*
* Get the Fixed Part of the Display
*/
static int g364fb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info)
{
*fix = info->fix;
return 0;
}
/*
* Get the User Defined Part of the Display
*/
static int g364fb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
*var = info->var;
return 0;
}
/*
* Set the User Defined Part of the Display
*/
static int g364fb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
struct display *display;
int oldbpp = -1, err;
if (con >= 0)
display = &fb_display[con];
else
display = &disp; /* used during initialization */
if (var->xres > info->var.xres || var->yres > info->var.yres ||
var->xres_virtual > info->var.xres_virtual ||
var->yres_virtual > info->var.yres_virtual ||
var->bits_per_pixel > info->var.bits_per_pixel ||
var->nonstd ||
(var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
return -EINVAL;
if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
oldbpp = info->var.bits_per_pixel;
memcpy(var, &info->var, sizeof(var));
display->var = *var;
*(unsigned int *)TOP_REG = var->yoffset * var->xres;
}
if (oldbpp != var->bits_per_pixel) {
if ((err = fb_set_cmap(&info->cmap, 1, g364fb_setcolreg, info)))
return err;
}
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, int con,
struct fb_info *info)
{
if (var->xoffset || var->yoffset+var->yres > var->yres_virtual)
return -EINVAL;
*(unsigned int *)TOP_REG = var->yoffset * var->xres;
return 0;
}
/*
* Get the Colormap
*/
static int g364fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
fb_copy_cmap(&info->cmap, cmap, kspc ? 0 : 1);
return 0;
}
/*
* Set the Colormap
*/
static int g364fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
int err = 0;
/* current console? */
if (con == currcon) {
if ((err = fb_set_cmap(cmap, kspc, g364fb_setcolreg, info))) {
return err;
} else {
fb_copy_cmap(cmap, &info->cmap, kspc ? 0 : 1);
}
}
/* Always copy colormap to fb_display. */
fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0: 1);
return err;
}
static int g364fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
u_long arg, int con, struct fb_info *info)
{
return -EINVAL;
}
/*
* Initialisation
*/
int __init g364fb_init(void)
{
volatile unsigned int *curs_pal_ptr = (volatile unsigned int *)CURS_PAL_REG;
unsigned int xres, yres;
int mem, i;
/* TBD: G364 detection */
/* get the resolution set by ARC console */
*(volatile unsigned int *)CTLA_REG &= ~ENABLE_VTG;
xres = (*((volatile unsigned int*)DISPLAY_REG) & 0x00ffffff) * 4;
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 = fb_var.xres_virtual = xres;
fb_var.yres = yres;
/* 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_fix.line_length = (xres / 8) * fb_var.bits_per_pixel;
fb_var.yres_virtual = fb_fix.smem_len / xres;
fb_copy_cmap(fb_default_cmap(1<<fb_var.bits_per_pixel),
&fb_info.cmap, 0);
fb_set_cmap(&fb_info.cmap, 1, g364fb_setcolreg, &fb_info);
disp.var = fb_var;
disp.cmap.start = 0;
disp.cmap.len = 0;
disp.cmap.red = disp.cmap.green = disp.cmap.blue = disp.cmap.transp = NULL;
disp.screen_base = (char *)G364_MEM_BASE; /* virtual kernel address */
disp.visual = fb_fix.visual;
disp.type = fb_fix.type;
disp.type_aux = fb_fix.type_aux;
disp.ypanstep = fb_fix.ypanstep;
disp.ywrapstep = fb_fix.ywrapstep;
disp.line_length = fb_fix.line_length;
disp.can_soft_blank = 1;
disp.inverse = 0;
disp.dispsw = &fbcon_g364cfb8;
strcpy(fb_info.modename, fb_fix.id);
fb_info.node = -1;
fb_info.fbops = &g364fb_ops;
fb_info.disp = &disp;
fb_info.var = fb_var;
fb_info.fix = fb_fix;
fb_info.fontname[0] = '\0';
fb_info.changevar = NULL;
fb_info.switch_con = &g364fbcon_switch;
fb_info.updatevar = &g364fbcon_updatevar;
fb_info.blank = &g364fb_blank;
fb_info.flags = FBINFO_FLAG_DEFAULT;
g364fb_set_var(&fb_info.var, -1, &fb_info);
if (register_framebuffer(&fb_info) < 0)
return -EINVAL;
printk("fb%d: %s frame buffer device\n", GET_FB_IDX(fb_info.node),
fb_fix.id);
return 0;
}
static int g364fbcon_switch(int con, struct fb_info *info)
{
struct display *prev = &fb_display[currcon];
struct display *new = &fb_display[con];
currcon = con;
/* Save current colormap */
fb_copy_cmap(&prev->fb_info->cmap, &prev->cmap, 0);
/* Install new colormap */
new->fb_info->fbops->fb_set_cmap(&new->cmap, 0, con, new->fb_info);
g364fbcon_updatevar(con, info);
return 0;
}
/*
* Update the `var' structure (called by fbcon.c)
*/
static int g364fbcon_updatevar(int con, struct fb_info *info)
{
if (con == currcon) {
struct fb_var_screeninfo *var = &fb_display[currcon].var;
/* hardware scrolling */
*(unsigned int *)TOP_REG = var->yoffset * var->xres;
}
return 0;
}
/*
* Blank the display.
*/
static void g364fb_blank(int blank, struct fb_info *info)
{
if (blank)
*(unsigned int *) CTLA_REG |= FORCE_BLANK;
else
*(unsigned int *) CTLA_REG &= ~FORCE_BLANK;
}
/*
* 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;
}
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