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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [video/] [pvr2fb.c] - Rev 1765
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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);