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#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/delay.h>
#include <linux/interrupt.h>
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/apollohw.h>
#include <linux/fb.h>
#include <linux/module.h>
/* apollo video HW definitions */
/*
* Control Registers. IOBASE + $x
*
* Note: these are the Memory/IO BASE definitions for a mono card set to the
* alternate address
*
* Control 3A and 3B serve identical functions except that 3A
* deals with control 1 and 3b deals with Color LUT reg.
*/
#define AP_IOBASE 0x5d80 /* Base address of 1 plane board. */
#define AP_STATUS 0x5d80 /* Status register. Read */
#define AP_WRITE_ENABLE 0x5d80 /* Write Enable Register Write */
#define AP_DEVICE_ID 0x5d81 /* Device ID Register. Read */
#define AP_ROP_1 0x5d82 /* Raster Operation reg. Write Word */
#define AP_DIAG_MEM_REQ 0x5d84 /* Diagnostic Memory Request. Write Word */
#define AP_CONTROL_0 0x5d88 /* Control Register 0. Read/Write */
#define AP_CONTROL_1 0x5d8a /* Control Register 1. Read/Write */
#define AP_CONTROL_3A 0x5d8e /* Control Register 3a. Read/Write */
#define AP_CONTROL_2 0x5d8c /* Control Register 2. Read/Write */
#define FRAME_BUFFER_START 0x0FA0000
#define FRAME_BUFFER_LEN 0x40000
/* CREG 0 */
#define VECTOR_MODE 0x40 /* 010x.xxxx */
#define DBLT_MODE 0x80 /* 100x.xxxx */
#define NORMAL_MODE 0xE0 /* 111x.xxxx */
#define SHIFT_BITS 0x1F /* xxx1.1111 */
/* other bits are Shift value */
/* CREG 1 */
#define AD_BLT 0x80 /* 1xxx.xxxx */
#define NORMAL 0x80 /* 1xxx.xxxx */ /* What is happening here ?? */
#define INVERSE 0x00 /* 0xxx.xxxx */ /* Clearing this reverses the screen */
#define PIX_BLT 0x00 /* 0xxx.xxxx */
#define AD_HIBIT 0x40 /* xIxx.xxxx */
#define ROP_EN 0x10 /* xxx1.xxxx */
#define DST_EQ_SRC 0x00 /* xxx0.xxxx */
#define nRESET_SYNC 0x08 /* xxxx.1xxx */
#define SYNC_ENAB 0x02 /* xxxx.xx1x */
#define BLANK_DISP 0x00 /* xxxx.xxx0 */
#define ENAB_DISP 0x01 /* xxxx.xxx1 */
#define NORM_CREG1 (nRESET_SYNC | SYNC_ENAB | ENAB_DISP) /* no reset sync */
/* CREG 2 */
/*
* Following 3 defines are common to 1, 4 and 8 plane.
*/
#define S_DATA_1s 0x00 /* 00xx.xxxx */ /* set source to all 1's -- vector drawing */
#define S_DATA_PIX 0x40 /* 01xx.xxxx */ /* takes source from ls-bits and replicates over 16 bits */
#define S_DATA_PLN 0xC0 /* 11xx.xxxx */ /* normal, each data access =16-bits in
one plane of image mem */
/* CREG 3A/CREG 3B */
# define RESET_CREG 0x80 /* 1000.0000 */
/* ROP REG - all one nibble */
/* ********* NOTE : this is used r0,r1,r2,r3 *********** */
#define ROP(r2,r3,r0,r1) ( (U_SHORT)((r0)|((r1)<<4)|((r2)<<8)|((r3)<<12)) )
#define DEST_ZERO 0x0
#define SRC_AND_DEST 0x1
#define SRC_AND_nDEST 0x2
#define SRC 0x3
#define nSRC_AND_DEST 0x4
#define DEST 0x5
#define SRC_XOR_DEST 0x6
#define SRC_OR_DEST 0x7
#define SRC_NOR_DEST 0x8
#define SRC_XNOR_DEST 0x9
#define nDEST 0xA
#define SRC_OR_nDEST 0xB
#define nSRC 0xC
#define nSRC_OR_DEST 0xD
#define SRC_NAND_DEST 0xE
#define DEST_ONE 0xF
#define SWAP(A) ((A>>8) | ((A&0xff) <<8))
#if 0
#define outb(a,d) *(char *)(a)=(d)
#define outw(a,d) *(unsigned short *)a=d
#endif
void dn_video_setup(char *options, int *ints);
/* frame buffer operations */
static int dn_fb_open(int fbidx);
static int dn_fb_release(int fbidx);
static int dn_fb_get_fix(struct fb_fix_screeninfo *fix, int con);
static int dn_fb_get_var(struct fb_var_screeninfo *var, int con);
static int dn_fb_set_var(struct fb_var_screeninfo *var, int isactive);
static int dn_fb_get_cmap(struct fb_cmap *cmap,int kspc,int con);
static int dn_fb_set_cmap(struct fb_cmap *cmap,int kspc,int con);
static int dn_fb_pan_display(struct fb_var_screeninfo *var, int con);
static int dn_fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg, int con);
static int dnfbcon_switch(int con);
static int dnfbcon_updatevar(int con);
static void dnfbcon_blank(int blank);
static void dn_fb_set_disp(int con);
static struct display disp[MAX_NR_CONSOLES];
static struct fb_info fb_info;
static struct fb_ops dn_fb_ops = {
dn_fb_open,dn_fb_release, dn_fb_get_fix, dn_fb_get_var, dn_fb_set_var,
dn_fb_get_cmap, dn_fb_set_cmap, dn_fb_pan_display, dn_fb_ioctl
};
static int currcon=0;
#define NUM_TOTAL_MODES 1
struct fb_var_screeninfo dn_fb_predefined[] = {
{ 0, },
};
static char dn_fb_name[]="Apollo ";
static int dn_fb_open(int fbidx)
{
/*
* Nothing, only a usage count for the moment
*/
MOD_INC_USE_COUNT;
return(0);
}
static int dn_fb_release(int fbidx)
{
MOD_DEC_USE_COUNT;
return(0);
}
static int dn_fb_get_fix(struct fb_fix_screeninfo *fix, int con) {
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
strcpy(fix->id,"Apollo Mono");
fix->smem_start=(char*)(FRAME_BUFFER_START+IO_BASE);
fix->smem_len=FRAME_BUFFER_LEN;
fix->type=FB_TYPE_PACKED_PIXELS;
fix->type_aux=0;
fix->visual=FB_VISUAL_MONO10;
fix->xpanstep=0;
fix->ypanstep=0;
fix->ywrapstep=0;
fix->line_length=256;
return 0;
}
static int dn_fb_get_var(struct fb_var_screeninfo *var, int con) {
var->xres=1280;
var->yres=1024;
var->xres_virtual=2048;
var->yres_virtual=1024;
var->xoffset=0;
var->yoffset=0;
var->bits_per_pixel=1;
var->grayscale=0;
var->nonstd=0;
var->activate=0;
var->height=-1;
var->width=-1;
var->pixclock=0;
var->left_margin=0;
var->right_margin=0;
var->hsync_len=0;
var->vsync_len=0;
var->sync=0;
var->vmode=FB_VMODE_NONINTERLACED;
var->accel=FB_ACCEL_NONE;
return 0;
}
static int dn_fb_set_var(struct fb_var_screeninfo *var, int isactive) {
printk("fb_set_var\n");
if(var->xres!=1280)
return -EINVAL;
if(var->yres!=1024)
return -EINVAL;
if(var->xres_virtual!=2048)
return -EINVAL;
if(var->yres_virtual!=1024)
return -EINVAL;
if(var->xoffset!=0)
return -EINVAL;
if(var->yoffset!=0)
return -EINVAL;
if(var->bits_per_pixel!=1)
return -EINVAL;
if(var->grayscale!=0)
return -EINVAL;
if(var->nonstd!=0)
return -EINVAL;
if(var->activate!=0)
return -EINVAL;
if(var->pixclock!=0)
return -EINVAL;
if(var->left_margin!=0)
return -EINVAL;
if(var->right_margin!=0)
return -EINVAL;
if(var->hsync_len!=0)
return -EINVAL;
if(var->vsync_len!=0)
return -EINVAL;
if(var->sync!=0)
return -EINVAL;
if(var->vmode!=FB_VMODE_NONINTERLACED)
return -EINVAL;
if(var->accel!=FB_ACCEL_NONE)
return -EINVAL;
return 0;
}
static int dn_fb_get_cmap(struct fb_cmap *cmap,int kspc,int con) {
printk("get cmap not supported\n");
return -EINVAL;
}
static int dn_fb_set_cmap(struct fb_cmap *cmap,int kspc,int con) {
printk("set cmap not supported\n");
return -EINVAL;
}
static int dn_fb_pan_display(struct fb_var_screeninfo *var, int con) {
printk("panning not supported\n");
return -EINVAL;
}
static int dn_fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg, int con) {
printk("no IOCTLs as of yet.\n");
return -EINVAL;
}
static void dn_fb_set_disp(int con) {
struct fb_fix_screeninfo fix;
dn_fb_get_fix(&fix,con);
if(con==-1)
con=0;
disp[con].screen_base = (u_char *)fix.smem_start;
printk("screenbase: %p\n",fix.smem_start);
disp[con].visual = fix.visual;
disp[con].type = fix.type;
disp[con].type_aux = fix.type_aux;
disp[con].ypanstep = fix.ypanstep;
disp[con].ywrapstep = fix.ywrapstep;
disp[con].can_soft_blank = 1;
disp[con].inverse = 0;
disp[con].line_length = fix.line_length;
}
unsigned long dn_fb_init(unsigned long mem_start) {
int err;
printk("dn_fb_init\n");
fb_info.changevar=NULL;
strcpy(&fb_info.modename[0],dn_fb_name);
fb_info.fontname[0]=0;
fb_info.disp=disp;
fb_info.switch_con=&dnfbcon_switch;
fb_info.updatevar=&dnfbcon_updatevar;
fb_info.blank=&dnfbcon_blank;
fb_info.node = -1;
fb_info.fbops = &dn_fb_ops;
fb_info.fbvar = dn_fb_predefined;
fb_info.fbvar_num = NUM_TOTAL_MODES;
printk("dn_fb_init: register\n");
err=register_framebuffer(&fb_info);
if(err < 0) {
panic("unable to register apollo frame buffer\n");
}
/* now we have registered we can safely setup the hardware */
outb(RESET_CREG, AP_CONTROL_3A);
outw(0x0, AP_WRITE_ENABLE);
outb(NORMAL_MODE,AP_CONTROL_0);
outb((AD_BLT | DST_EQ_SRC | NORM_CREG1), AP_CONTROL_1);
outb(S_DATA_PLN, AP_CONTROL_2);
outw(SWAP(0x3),AP_ROP_1);
printk("apollo frame buffer alive and kicking !\n");
dn_fb_get_var(&disp[0].var,0);
dn_fb_set_disp(-1);
return mem_start;
}
static int dnfbcon_switch(int con) {
currcon=con;
return 0;
}
static int dnfbcon_updatevar(int con) {
return 0;
}
static void dnfbcon_blank(int blank) {
printk("dnfbcon_blank: %d\n",blank);
if(blank) {
outb(0, AP_CONTROL_3A);
outb((AD_BLT | DST_EQ_SRC | NORM_CREG1) & ~ENAB_DISP,
AP_CONTROL_1);
}
else {
outb(1, AP_CONTROL_3A);
outb((AD_BLT | DST_EQ_SRC | NORM_CREG1), AP_CONTROL_1);
}
return ;
}
void dn_video_setup(char *options, int *ints) {
return;
}
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