pvr2fb.c
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上传日期:2013-02-24
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文件大小:32k
- /* 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 %dn", 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 PALn");
- 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 NTSCn");
- 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 intn");
- return -EBUSY;
- }
- #ifdef CONFIG_MTRR
- if (enable_mtrr) {
- mtrr_handle = mtrr_add(videomemory, videomemorysize, MTRR_TYPE_WRCOMB, 1);
- printk("pvr2fb: MTRR turned onn");
- }
- #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 memoryn",
- 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: %sn",
- 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 offn");
- }
- #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] = ' ';
- 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);