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/* drivers/video/pvr2fb.c
*
* Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega
* Dreamcast.
*
* Copyright (c) 2001 M. R. Brown <mrbrown@0xd6.org>
* Copyright (c) 2001 Paul Mundt <lethal@chaoticdreams.org>
*
* This file is part of the LinuxDC project (linuxdc.sourceforge.net).
*
*/
/*
* This driver is mostly based on the excellent amifb and vfb sources. It uses
* an odd scheme for converting hardware values to/from framebuffer values, here are
* some hacked-up formulas:
*
* The Dreamcast has screen offsets from each side of it's four borders and the start
* offsets of the display window. I used these values to calculate 'pseudo' values
* (think of them as placeholders) for the fb video mode, so that when it came time
* to convert these values back into their hardware values, I could just add mode-
* specific offsets to get the correct mode settings:
*
* left_margin = diwstart_h - borderstart_h;
* right_margin = borderstop_h - (diwstart_h + xres);
* upper_margin = diwstart_v - borderstart_v;
* lower_margin = borderstop_v - (diwstart_h + yres);
*
* hsync_len = borderstart_h + (hsync_total - borderstop_h);
* vsync_len = borderstart_v + (vsync_total - borderstop_v);
*
* Then, when it's time to convert back to hardware settings, the only constants
* are the borderstart_* offsets, all other values are derived from the fb video
* mode:
*
* // PAL
* borderstart_h = 116;
* borderstart_v = 44;
* ...
* borderstop_h = borderstart_h + hsync_total - hsync_len;
* ...
* diwstart_v = borderstart_v - upper_margin;
*
* However, in the current implementation, the borderstart values haven't had
* the benefit of being fully researched, so some modes may be broken.
*/
#include <linux/module.h>
#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/config.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/console.h>
#ifdef CONFIG_SH_DREAMCAST
#include <asm/io.h>
#include <asm/machvec.h>
#include <asm/dc_sysasic.h>
#endif
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#include <video/fbcon.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb24.h>
#include <video/fbcon-cfb32.h>
#ifdef CONFIG_FB_PVR2_DEBUG
# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
#else
# define DPRINTK(fmt, args...)
#endif
/* 2D video registers */
#define DISP_BASE 0xa05f8000
#define DISP_BRDRCOLR (DISP_BASE + 0x40)
#define DISP_DIWMODE (DISP_BASE + 0x44)
#define DISP_DIWADDRL (DISP_BASE + 0x50)
#define DISP_DIWADDRS (DISP_BASE + 0x54)
#define DISP_DIWSIZE (DISP_BASE + 0x5c)
#define DISP_SYNCCONF (DISP_BASE + 0xd0)
#define DISP_BRDRHORZ (DISP_BASE + 0xd4)
#define DISP_SYNCSIZE (DISP_BASE + 0xd8)
#define DISP_BRDRVERT (DISP_BASE + 0xdc)
#define DISP_DIWCONF (DISP_BASE + 0xe8)
#define DISP_DIWHSTRT (DISP_BASE + 0xec)
#define DISP_DIWVSTRT (DISP_BASE + 0xf0)
/* Pixel clocks, one for TV output, doubled for VGA output */
#define TV_CLK 74239
#define VGA_CLK 37119
/* This is for 60Hz - the VTOTAL is doubled for interlaced modes */
#define PAL_HTOTAL 863
#define PAL_VTOTAL 312
#define NTSC_HTOTAL 857
#define NTSC_VTOTAL 262
enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE };
enum { VO_PAL, VO_NTSC, VO_VGA };
struct pvr2_params { u_short val; char *name; };
static struct pvr2_params cables[] __initdata = {
{ CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" },
};
static struct pvr2_params outputs[] __initdata = {
{ VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" },
};
/*
* This describes the current video mode
*/
static struct pvr2fb_par {
int xres;
int yres;
int vxres;
int vyres;
int xoffset;
int yoffset;
u_short bpp;
u_long pixclock;
u_short hsync_total; /* Clocks/line */
u_short vsync_total; /* Lines/field */
u_short borderstart_h;
u_short borderstop_h;
u_short borderstart_v;
u_short borderstop_v;
u_short diwstart_h; /* Horizontal offset of the display field */
u_short diwstart_v; /* Vertical offset of the display field, for
interlaced modes, this is the long field */
u_long disp_start; /* Address of image within VRAM */
u_long next_line; /* Modulo for next line */
u_char is_interlaced; /* Is the display interlaced? */
u_char is_doublescan; /* Are scanlines output twice? (doublescan) */
u_char is_lowres; /* Is horizontal pixel-doubling enabled? */
u_long bordercolor; /* RGB888 format border color */
u_long vmode;
} currentpar;
static int currcon = 0;
static int currbpp;
static struct display disp;
static struct fb_info fb_info;
static int pvr2fb_inverse = 0;
static struct { u_short red, green, blue, alpha; } palette[256];
static union {
#ifdef FBCON_HAS_CFB16
u16 cfb16[16];
#endif
#ifdef FBCON_HAS_CFB24
u32 cfb24[16];
#endif
#ifdef FBCON_HAS_CFB32
u32 cfb32[16];
#endif
} fbcon_cmap;
static char pvr2fb_name[16] = "NEC PowerVR2";
#define VIDEOMEMSIZE (8*1024*1024)
static u_long videomemory = 0xa5000000, videomemorysize = VIDEOMEMSIZE;
static int cable_type = -1;
static int video_output = -1;
#ifdef CONFIG_MTRR
static int enable_mtrr = 1;
static int mtrr_handle;
#endif
/*
* We do all updating, blanking, etc. during the vertical retrace period
*/
static u_short do_vmode_full = 0; /* Change the video mode */
static u_short do_vmode_pan = 0; /* Update the video mode */
static short do_blank = 0; /* (Un)Blank the screen */
static u_short is_blanked = 0; /* Is the screen blanked? */
/* Interface used by the world */
int pvr2fb_setup(char*);
static int pvr2fb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info);
static int pvr2fb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int pvr2fb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int pvr2fb_pan_display(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int pvr2fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
static int pvr2fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
/*
* Interface to the low level console driver
*/
static int pvr2fbcon_switch(int con, struct fb_info *info);
static int pvr2fbcon_updatevar(int con, struct fb_info *info);
static void pvr2fbcon_blank(int blank, struct fb_info *info);
/*
* Internal/hardware-specific routines
*/
static void do_install_cmap(int con, struct fb_info *info);
static u_long get_line_length(int xres_virtual, int bpp);
static void set_color_bitfields(struct fb_var_screeninfo *var);
static int pvr2_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *info);
static int pvr2_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static int pvr2_encode_fix(struct fb_fix_screeninfo *fix,
struct pvr2fb_par *par);
static int pvr2_decode_var(struct fb_var_screeninfo *var,
struct pvr2fb_par *par);
static int pvr2_encode_var(struct fb_var_screeninfo *var,
struct pvr2fb_par *par);
static void pvr2_get_par(struct pvr2fb_par *par);
static void pvr2_set_var(struct fb_var_screeninfo *var);
static void pvr2_pan_var(struct fb_var_screeninfo *var);
static int pvr2_update_par(void);
static void pvr2_update_display(void);
static void pvr2_init_display(void);
static void pvr2_do_blank(void);
static void pvr2fb_interrupt(int irq, void *dev_id, struct pt_regs *fp);
static int pvr2_init_cable(void);
static int pvr2_get_param(const struct pvr2_params *p, const char *s,
int val, int size);
static struct fb_ops pvr2fb_ops = {
owner: THIS_MODULE,
fb_get_fix: pvr2fb_get_fix,
fb_get_var: pvr2fb_get_var,
fb_set_var: pvr2fb_set_var,
fb_get_cmap: pvr2fb_get_cmap,
fb_set_cmap: pvr2fb_set_cmap,
fb_pan_display: pvr2fb_pan_display,
};
static struct fb_videomode pvr2_modedb[] __initdata = {
/*
* Broadcast video modes (PAL and NTSC). I'm unfamiliar with
* PAL-M and PAL-N, but from what I've read both modes parallel PAL and
* NTSC, so it shouldn't be a problem (I hope).
*/
{
/* 640x480 @ 60Hz interlaced (NTSC) */
"ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26,
FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP
},
{
/* 640x240 @ 60Hz (NTSC) */
/* XXX: Broken! Don't use... */
"ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22,
FB_SYNC_BROADCAST, FB_VMODE_YWRAP
},
{
/* 640x480 @ 60hz (VGA) */
"vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26,
0, FB_VMODE_YWRAP
},
};
#define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb)
#define DEFMODE_NTSC 0
#define DEFMODE_PAL 0
#define DEFMODE_VGA 2
static int defmode = DEFMODE_NTSC;
static char *mode_option __initdata = NULL;
/* Get the fixed part of the display */
static int pvr2fb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info)
{
struct pvr2fb_par par;
if (con == -1)
pvr2_get_par(&par);
else {
int err;
if ((err = pvr2_decode_var(&fb_display[con].var, &par)))
return err;
}
return pvr2_encode_fix(fix, &par);
}
/* Get the user-defined part of the display */
static int pvr2fb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
int err = 0;
if (con == -1) {
struct pvr2fb_par par;
pvr2_get_par(&par);
err = pvr2_encode_var(var, &par);
} else
*var = fb_display[con].var;
return err;
}
/* Set the user-defined part of the display */
static int pvr2fb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
int err, activate = var->activate;
int oldxres, oldyres, oldvxres, oldvyres, oldbpp;
struct pvr2fb_par par;
struct display *display;
if (con >= 0)
display = &fb_display[con];
else
display = &disp; /* used during initialization */
/*
* FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
* as FB_VMODE_SMOOTH_XPAN is only used internally
*/
if (var->vmode & FB_VMODE_CONUPDATE) {
var->vmode |= FB_VMODE_YWRAP;
var->xoffset = display->var.xoffset;
var->yoffset = display->var.yoffset;
}
if ((err = pvr2_decode_var(var, &par)))
return err;
pvr2_encode_var(var, &par);
/* Do memory check and bitfield set here?? */
if ((activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
oldxres = display->var.xres;
oldyres = display->var.yres;
oldvxres = display->var.xres_virtual;
oldvyres = display->var.yres_virtual;
oldbpp = display->var.bits_per_pixel;
display->var = *var;
if (oldxres != var->xres || oldyres != var->yres ||
oldvxres != var->xres_virtual || oldvyres != var->yres_virtual ||
oldbpp != var->bits_per_pixel) {
struct fb_fix_screeninfo fix;
pvr2_encode_fix(&fix, &par);
display->screen_base = (char *)fix.smem_start;
display->scrollmode = SCROLL_YREDRAW;
display->visual = fix.visual;
display->type = fix.type;
display->type_aux = fix.type_aux;
display->ypanstep = fix.ypanstep;
display->ywrapstep = fix.ywrapstep;
display->line_length = fix.line_length;
display->can_soft_blank = 1;
display->inverse = pvr2fb_inverse;
switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB16
case 16:
display->dispsw = &fbcon_cfb16;
display->dispsw_data = fbcon_cmap.cfb16;
break;
#endif
#ifdef FBCON_HAS_CFB24
case 24:
display->dispsw = &fbcon_cfb24;
display->dispsw_data = fbcon_cmap.cfb24;
break;
#endif
#ifdef FBCON_HAS_CFB32
case 32:
display->dispsw = &fbcon_cfb32;
display->dispsw_data = fbcon_cmap.cfb32;
break;
#endif
default:
display->dispsw = &fbcon_dummy;
break;
}
if (fb_info.changevar)
(*fb_info.changevar)(con);
}
if (oldbpp != var->bits_per_pixel) {
if ((err = fb_alloc_cmap(&display->cmap, 0, 0)))
return err;
do_install_cmap(con, info);
}
if (con == currcon)
pvr2_set_var(&display->var);
}
return 0;
}
/*
* Pan or wrap the display.
* This call looks only at xoffset, yoffset and the FB_VMODE_YRAP flag
*/
static int pvr2fb_pan_display(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
if (var->vmode & FB_VMODE_YWRAP) {
if (var->yoffset<0 || var->yoffset >=
fb_display[con].var.yres_virtual || var->xoffset)
return -EINVAL;
} else {
if (var->xoffset+fb_display[con].var.xres >
fb_display[con].var.xres_virtual ||
var->yoffset+fb_display[con].var.yres >
fb_display[con].var.yres_virtual)
return -EINVAL;
}
if (con == currcon)
pvr2_pan_var(var);
fb_display[con].var.xoffset = var->xoffset;
fb_display[con].var.yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP)
fb_display[con].var.vmode |= FB_VMODE_YWRAP;
else
fb_display[con].var.vmode &= ~FB_VMODE_YWRAP;
return 0;
}
/* Get the colormap */
static int pvr2fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
if (con == currcon) /* current console? */
return fb_get_cmap(cmap, kspc, pvr2_getcolreg, info);
else if (fb_display[con].cmap.len) /* non default colormap? */
fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
else
fb_copy_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
cmap, kspc ? 0 : 2);
return 0;
}
/* Set the colormap */
static int pvr2fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
int err;
if (!fb_display[con].cmap.len) { /* no colormap allocated? */
if ((err = fb_alloc_cmap(&fb_display[con].cmap,
1<<fb_display[con].var.bits_per_pixel,
0)))
return err;
}
if (con == currcon) /* current console? */
return fb_set_cmap(cmap, kspc, pvr2_setcolreg, info);
else
fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
return 0;
}
static int pvr2fbcon_switch(int con, struct fb_info *info)
{
/* Do we have to save the colormap? */
if (fb_display[currcon].cmap.len)
fb_get_cmap(&fb_display[currcon].cmap, 1, pvr2_getcolreg, info);
currcon = con;
pvr2_set_var(&fb_display[con].var);
/* Install new colormap */
do_install_cmap(con, info);
return 0;
}
static int pvr2fbcon_updatevar(int con, struct fb_info *info)
{
pvr2_pan_var(&fb_display[con].var);
return 0;
}
static void pvr2fbcon_blank(int blank, struct fb_info *info)
{
do_blank = blank ? blank : -1;
}
/* Setup the colormap */
static void do_install_cmap(int con, struct fb_info *info)
{
if (con != currcon)
return;
if (fb_display[con].cmap.len)
fb_set_cmap(&fb_display[con].cmap, 1, pvr2_setcolreg, info);
else
fb_set_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
1, pvr2_setcolreg, info);
}
static inline u_long get_line_length(int xres_virtual, int bpp)
{
return (u_long)((((xres_virtual*bpp)+31)&~31) >> 3);
}
static void set_color_bitfields(struct fb_var_screeninfo *var)
{
switch (var->bits_per_pixel) {
case 16: /* RGB 565 */
var->red.offset = 11; var->red.length = 5;
var->green.offset = 5; var->green.length = 6;
var->blue.offset = 0; var->blue.length = 5;
var->transp.offset = 0; var->transp.length = 0;
break;
case 24: /* RGB 888 */
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
case 32: /* ARGB 8888 */
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 24; var->transp.length = 8;
break;
}
}
static int pvr2_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *info)
{
if (regno > 255)
return 1;
*red = palette[regno].red;
*green = palette[regno].green;
*blue = palette[regno].blue;
*transp = 0;
return 0;
}
static int pvr2_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
if (regno > 255)
return 1;
palette[regno].red = red;
palette[regno].green = green;
palette[regno].blue = blue;
if (regno < 16) {
switch (currbpp) {
#ifdef FBCON_HAS_CFB16
case 16: /* RGB 565 */
fbcon_cmap.cfb16[regno] = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
#endif
#ifdef FBCON_HAS_CFB24
case 24: /* RGB 888 */
red >>= 8; green >>= 8; blue >>= 8;
fbcon_cmap.cfb24[regno] = (red << 16) | (green << 8) | blue;
break;
#endif
#ifdef FBCON_HAS_CFB32
case 32: /* ARGB 8888 */
red >>= 8; green >>= 8; blue >>= 8;
fbcon_cmap.cfb32[regno] = (red << 16) | (green << 8) | blue;
break;
#endif
default:
DPRINTK("Invalid bit depth %d?!?\n", currbpp);
return 1;
}
}
return 0;
}
static int pvr2_encode_fix(struct fb_fix_screeninfo *fix,
struct pvr2fb_par *par)
{
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
strcpy(fix->id, pvr2fb_name);
fix->smem_start = videomemory;
fix->smem_len = videomemorysize;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
fix->visual = FB_VISUAL_TRUECOLOR;
if (par->vmode & FB_VMODE_YWRAP) {
fix->ywrapstep = 1;
fix->xpanstep = fix->ypanstep = 0;
} else {
fix->ywrapstep = 0;
fix->xpanstep = 1;
fix->ypanstep = 1;
}
fix->line_length = par->next_line;
return 0;
}
/*
* Create a hardware video mode using the framebuffer values. If a value needs
* to be clipped or constrained it's done here. This routine needs a bit more
* work to make sure we're doing the right tests at the right time.
*/
static int pvr2_decode_var(struct fb_var_screeninfo *var,
struct pvr2fb_par *par)
{
u_long line_length;
u_short vtotal;
if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) {
DPRINTK("Invalid pixclock value %d\n", var->pixclock);
return -EINVAL;
}
par->pixclock = var->pixclock;
if ((par->xres = var->xres) < 320)
par->xres = 320;
if ((par->yres = var->yres) < 240)
par->yres = 240;
if ((par->vxres = var->xres_virtual) < par->xres)
par->vxres = par->xres;
if ((par->vyres = var->yres_virtual) < par->yres)
par->vyres = par->yres;
if ((par->bpp = var->bits_per_pixel) <= 16)
par->bpp = 16;
else if ((par->bpp = var->bits_per_pixel) <= 24)
par->bpp = 24;
else if ((par->bpp = var->bits_per_pixel) <= 32)
par->bpp = 32;
currbpp = par->bpp;
/*
* XXX: It's possible that a user could use a VGA box, change the cable
* type in hardware (i.e. switch from VGA<->composite), then change modes
* (i.e. switching to another VT). If that happens we should automagically
* change the output format to cope, but currently I don't have a VGA box
* to make sure this works properly.
*/
cable_type = pvr2_init_cable();
if (cable_type == CT_VGA && video_output != VO_VGA)
video_output = VO_VGA;
par->vmode = var->vmode & FB_VMODE_MASK;
if (par->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA)
par->is_interlaced = 1;
/*
* XXX: Need to be more creative with this (i.e. allow doublecan for
* PAL/NTSC output).
*/
par->is_doublescan = (par->yres < 480 && video_output == VO_VGA);
par->hsync_total = var->left_margin + var->xres + var->right_margin +
var->hsync_len;
par->vsync_total = var->upper_margin + var->yres + var->lower_margin +
var->vsync_len;
if (var->sync & FB_SYNC_BROADCAST) {
vtotal = par->vsync_total;
if (par->is_interlaced)
vtotal /= 2;
if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
/* PAL video output */
/* XXX: Should be using a range here ... ? */
if (par->hsync_total != PAL_HTOTAL) {
DPRINTK("invalid hsync total for PAL\n");
return -EINVAL;
}
/* XXX: Check for start values here... */
/* XXX: Check hardware for PAL-compatibility */
par->borderstart_h = 116;
par->borderstart_v = 44;
} else {
/* NTSC video output */
if (par->hsync_total != NTSC_HTOTAL) {
DPRINTK("invalid hsync total for NTSC\n");
return -EINVAL;
}
par->borderstart_h = 126;
par->borderstart_v = 18;
}
} else {
/* VGA mode */
/* XXX: What else needs to be checked? */
/*
* XXX: We have a little freedom in VGA modes, what ranges should
* be here (i.e. hsync/vsync totals, etc.)?
*/
par->borderstart_h = 126;
par->borderstart_v = 40;
}
/* Calculate the remainding offsets */
par->borderstop_h = par->borderstart_h + par->hsync_total -
var->hsync_len;
par->borderstop_v = par->borderstart_v + par->vsync_total -
var->vsync_len;
par->diwstart_h = par->borderstart_h + var->left_margin;
par->diwstart_v = par->borderstart_v + var->upper_margin;
if (!par->is_interlaced)
par->borderstop_v /= 2;
if (par->xres < 640)
par->is_lowres = 1;
/* XXX: Needs testing. */
if (!((par->vmode ^ var->vmode) & FB_VMODE_YWRAP)) {
par->xoffset = var->xoffset;
par->yoffset = var->yoffset;
if (par->vmode & FB_VMODE_YWRAP) {
if (par->xoffset || par->yoffset < 0 || par->yoffset >=
par->vyres)
par->xoffset = par->yoffset = 0;
} else {
if (par->xoffset < 0 || par->xoffset > par->vxres-par->xres ||
par->yoffset < 0 || par->yoffset > par->vyres-par->yres)
par->xoffset = par->yoffset = 0;
}
} else
par->xoffset = par->yoffset = 0;
/* Check memory sizes */
line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
if (line_length * var->yres_virtual > videomemorysize)
return -ENOMEM;
par->disp_start = videomemory + (get_line_length(par->vxres, par->bpp) *
par->yoffset) * get_line_length(par->xoffset, par->bpp);
par->next_line = line_length;
return 0;
}
static int pvr2_encode_var(struct fb_var_screeninfo *var,
struct pvr2fb_par *par)
{
memset(var, 0, sizeof(struct fb_var_screeninfo));
var->xres = par->xres;
var->yres = par->yres;
var->xres_virtual = par->vxres;
var->yres_virtual = par->vyres;
var->xoffset = par->xoffset;
var->yoffset = par->yoffset;
var->bits_per_pixel = par->bpp;
set_color_bitfields(var);
var->activate = FB_ACTIVATE_NOW;
var->height = -1;
var->width = -1;
var->pixclock = par->pixclock;
if (par->is_doublescan)
var->vmode = FB_VMODE_DOUBLE;
if (par->is_interlaced)
var->vmode |= FB_VMODE_INTERLACED;
else
var->vmode |= FB_VMODE_NONINTERLACED;
var->right_margin = par->borderstop_h - (par->diwstart_h + par->xres);
var->left_margin = par->diwstart_h - par->borderstart_h;
var->hsync_len = par->borderstart_h + (par->hsync_total - par->borderstop_h);
var->upper_margin = par->diwstart_v - par->borderstart_v;
var->lower_margin = par->borderstop_v - (par->diwstart_v + par->yres);
var->vsync_len = par->borderstart_v + (par->vsync_total - par->borderstop_v);
if (video_output != VO_VGA)
var->sync = FB_SYNC_BROADCAST;
if (par->vmode & FB_VMODE_YWRAP)
var->vmode |= FB_VMODE_YWRAP;
return 0;
}
static void pvr2_get_par(struct pvr2fb_par *par)
{
*par = currentpar;
}
/* Setup the new videomode in hardware */
static void pvr2_set_var(struct fb_var_screeninfo *var)
{
do_vmode_pan = 0;
do_vmode_full = 0;
pvr2_decode_var(var, ¤tpar);
do_vmode_full = 1;
}
/*
* Pan or wrap the display
* This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag in `var'.
*/
static void pvr2_pan_var(struct fb_var_screeninfo *var)
{
struct pvr2fb_par *par = ¤tpar;
par->xoffset = var->xoffset;
par->yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP)
par->vmode |= FB_VMODE_YWRAP;
else
par->vmode &= ~FB_VMODE_YWRAP;
do_vmode_pan = 0;
pvr2_update_par();
do_vmode_pan = 1;
}
static int pvr2_update_par(void)
{
struct pvr2fb_par *par = ¤tpar;
u_long move;
move = get_line_length(par->xoffset, par->bpp);
if (par->yoffset) {
par->disp_start += (par->next_line * par->yoffset) + move;
} else
par->disp_start += move;
return 0;
}
static void pvr2_update_display(void)
{
struct pvr2fb_par *par = ¤tpar;
/* Update the start address of the display image */
ctrl_outl(par->disp_start, DISP_DIWADDRL);
ctrl_outl(par->disp_start +
get_line_length(par->xoffset + par->xres, par->bpp),
DISP_DIWADDRS);
}
/*
* Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't
* very stable. It's probably due to the fact that a lot of the 2D video
* registers are still undocumented.
*/
static void pvr2_init_display(void)
{
struct pvr2fb_par *par = ¤tpar;
u_short diw_height, diw_width, diw_modulo = 1;
u_short bytesperpixel = par->bpp / 8;
/* hsync and vsync totals */
ctrl_outl((par->vsync_total << 16) | par->hsync_total, DISP_SYNCSIZE);
/* column height, modulo, row width */
/* since we're "panning" within vram, we need to offset things based
* on the offset from the virtual x start to our real gfx. */
if (video_output != VO_VGA && par->is_interlaced)
diw_modulo += par->next_line / 4;
diw_height = (par->is_interlaced ? par->yres / 2 : par->yres);
diw_width = get_line_length(par->xres, par->bpp) / 4;
ctrl_outl((diw_modulo << 20) | (--diw_height << 10) | --diw_width,
DISP_DIWSIZE);
/* display address, long and short fields */
ctrl_outl(par->disp_start, DISP_DIWADDRL);
ctrl_outl(par->disp_start +
get_line_length(par->xoffset + par->xres, par->bpp),
DISP_DIWADDRS);
/* border horizontal, border vertical, border color */
ctrl_outl((par->borderstart_h << 16) | par->borderstop_h, DISP_BRDRHORZ);
ctrl_outl((par->borderstart_v << 16) | par->borderstop_v, DISP_BRDRVERT);
ctrl_outl(0, DISP_BRDRCOLR);
/* display window start position */
ctrl_outl(par->diwstart_h, DISP_DIWHSTRT);
ctrl_outl((par->diwstart_v << 16) | par->diwstart_v, DISP_DIWVSTRT);
/* misc. settings */
ctrl_outl((0x16 << 16) | par->is_lowres, DISP_DIWCONF);
/* clock doubler (for VGA), scan doubler, display enable */
ctrl_outl(((video_output == VO_VGA) << 23) |
(par->is_doublescan << 1) | 1, DISP_DIWMODE);
/* bits per pixel */
ctrl_outl(ctrl_inl(DISP_DIWMODE) | (--bytesperpixel << 2), DISP_DIWMODE);
/* video enable, color sync, interlace,
* hsync and vsync polarity (currently unused) */
ctrl_outl(0x100 | ((par->is_interlaced /*|4*/) << 4), DISP_SYNCCONF);
}
/* Simulate blanking by making the border cover the entire screen */
#define BLANK_BIT (1<<3)
static void pvr2_do_blank(void)
{
u_long diwconf;
diwconf = ctrl_inl(DISP_DIWCONF);
if (do_blank > 0)
ctrl_outl(diwconf | BLANK_BIT, DISP_DIWCONF);
else
ctrl_outl(diwconf & ~BLANK_BIT, DISP_DIWCONF);
is_blanked = do_blank > 0 ? do_blank : 0;
}
static void pvr2fb_interrupt(int irq, void *dev_id, struct pt_regs *fp)
{
if (do_vmode_pan || do_vmode_full)
pvr2_update_display();
if (do_vmode_full)
pvr2_init_display();
if (do_vmode_pan)
do_vmode_pan = 0;
if (do_blank) {
pvr2_do_blank();
do_blank = 0;
}
if (do_vmode_full) {
do_vmode_full = 0;
}
}
/*
* Determine the cable type and initialize the cable output format. Don't do
* anything if the cable type has been overidden (via "cable:XX").
*/
#define PCTRA 0xff80002c
#define PDTRA 0xff800030
#define VOUTC 0xa0702c00
static int pvr2_init_cable(void)
{
if (cable_type < 0) {
ctrl_outl((ctrl_inl(PCTRA) & 0xfff0ffff) | 0x000a0000,
PCTRA);
cable_type = (ctrl_inw(PDTRA) >> 8) & 3;
}
/* Now select the output format (either composite or other) */
/* XXX: Save the previous val first, as this reg is also AICA
related */
if (cable_type == CT_COMPOSITE)
ctrl_outl(3 << 8, VOUTC);
else
ctrl_outl(0, VOUTC);
return cable_type;
}
int __init pvr2fb_init(void)
{
struct fb_var_screeninfo var;
u_long modememused;
if (!MACH_DREAMCAST)
return -ENXIO;
/* Make a guess at the monitor based on the attached cable */
if (pvr2_init_cable() == CT_VGA) {
fb_info.monspecs.hfmin = 30000;
fb_info.monspecs.hfmax = 70000;
fb_info.monspecs.vfmin = 60;
fb_info.monspecs.vfmax = 60;
}
else { /* Not VGA, using a TV (taken from acornfb) */
fb_info.monspecs.hfmin = 15469;
fb_info.monspecs.hfmax = 15781;
fb_info.monspecs.vfmin = 49;
fb_info.monspecs.vfmax = 51;
}
/* XXX: This needs to pull default video output via BIOS or other means */
if (video_output < 0) {
if (cable_type == CT_VGA)
video_output = VO_VGA;
else
video_output = VO_NTSC;
}
strcpy(fb_info.modename, pvr2fb_name);
fb_info.changevar = NULL;
fb_info.node = -1;
fb_info.fbops = &pvr2fb_ops;
fb_info.disp = &disp;
fb_info.switch_con = &pvr2fbcon_switch;
fb_info.updatevar = &pvr2fbcon_updatevar;
fb_info.blank = &pvr2fbcon_blank;
fb_info.flags = FBINFO_FLAG_DEFAULT;
memset(&var, 0, sizeof(var));
if (video_output == VO_VGA)
defmode = DEFMODE_VGA;
if (!fb_find_mode(&var, &fb_info, mode_option, pvr2_modedb,
NUM_TOTAL_MODES, &pvr2_modedb[defmode], 16)) {
return -EINVAL;
}
if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, 0,
"pvr2 VBL handler", ¤tpar)) {
DPRINTK("couldn't register VBL int\n");
return -EBUSY;
}
#ifdef CONFIG_MTRR
if (enable_mtrr) {
mtrr_handle = mtrr_add(videomemory, videomemorysize, MTRR_TYPE_WRCOMB, 1);
printk("pvr2fb: MTRR turned on\n");
}
#endif
pvr2fb_set_var(&var, -1, &fb_info);
if (register_framebuffer(&fb_info) < 0)
return -EINVAL;
modememused = get_line_length(var.xres_virtual, var.bits_per_pixel);
modememused *= var.yres_virtual;
printk("fb%d: %s frame buffer device, using %ldk/%ldk of video memory\n",
GET_FB_IDX(fb_info.node), fb_info.modename, modememused>>10,
videomemorysize>>10);
printk("fb%d: Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n",
GET_FB_IDX(fb_info.node), var.xres, var.yres, var.bits_per_pixel,
get_line_length(var.xres, var.bits_per_pixel),
(char *)pvr2_get_param(cables, NULL, cable_type, 3),
(char *)pvr2_get_param(outputs, NULL, video_output, 3));
return 0;
}
static void __exit pvr2fb_exit(void)
{
#ifdef CONFIG_MTRR
if (enable_mtrr) {
mtrr_del(mtrr_handle, videomemory, videomemorysize);
printk("pvr2fb: MTRR turned off\n");
}
#endif
unregister_framebuffer(&fb_info);
}
static int __init pvr2_get_param(const struct pvr2_params *p, const char *s,
int val, int size)
{
int i;
for (i = 0 ; i < size ; i++ ) {
if (s != NULL) {
if (!strnicmp(p[i].name, s, strlen(s)))
return p[i].val;
} else {
if (p[i].val == val)
return (int)p[i].name;
}
}
return -1;
}
/*
* Parse command arguments. Supported arguments are:
* inverse Use inverse color maps
* nomtrr Disable MTRR usage
* font:<fontname> Specify console font
* cable:composite|rgb|vga Override the video cable type
* output:NTSC|PAL|VGA Override the video output format
*
* <xres>x<yres>[-<bpp>][@<refresh>] or,
* <name>[-<bpp>][@<refresh>] Startup using this video mode
*/
#ifndef MODULE
int __init pvr2fb_setup(char *options)
{
char *this_opt;
char cable_arg[80];
char output_arg[80];
fb_info.fontname[0] = '\0';
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ","))) {
if (!*this_opt)
continue;
if (!strcmp(this_opt, "inverse")) {
pvr2fb_inverse = 1;
fb_invert_cmaps();
} else if (!strncmp(this_opt, "font:", 5))
strcpy(fb_info.fontname, this_opt + 5);
else if (!strncmp(this_opt, "cable:", 6))
strcpy(cable_arg, this_opt + 6);
else if (!strncmp(this_opt, "output:", 7))
strcpy(output_arg, this_opt + 7);
#ifdef CONFIG_MTRR
else if (!strncmp(this_opt, "nomtrr", 6))
enable_mtrr = 0;
#endif
else
mode_option = this_opt;
}
if (*cable_arg)
cable_type = pvr2_get_param(cables, cable_arg, 0, 3);
if (*output_arg)
video_output = pvr2_get_param(outputs, output_arg, 0, 3);
return 0;
}
#endif
#ifdef MODULE
MODULE_LICENSE("GPL");
module_init(pvr2fb_init);
#endif
module_exit(pvr2fb_exit);
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