| /* |
| * framebuffer driver for VBE 2.0 compliant graphic boards |
| * |
| * switching to graphics mode happens at boot time (while |
| * running in real mode, see arch/i386/boot/video.S). |
| * |
| * (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de> |
| * |
| */ |
| |
| #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/fb.h> |
| #include <linux/ioport.h> |
| #include <linux/init.h> |
| |
| #include <asm/io.h> |
| #include <asm/mtrr.h> |
| |
| #define dac_reg (0x3c8) |
| #define dac_val (0x3c9) |
| |
| /* --------------------------------------------------------------------- */ |
| |
| static struct fb_var_screeninfo vesafb_defined __initdata = { |
| .activate = FB_ACTIVATE_NOW, |
| .height = -1, |
| .width = -1, |
| .right_margin = 32, |
| .upper_margin = 16, |
| .lower_margin = 4, |
| .vsync_len = 4, |
| .vmode = FB_VMODE_NONINTERLACED, |
| }; |
| |
| static struct fb_fix_screeninfo vesafb_fix __initdata = { |
| .id = "VESA VGA", |
| .type = FB_TYPE_PACKED_PIXELS, |
| .accel = FB_ACCEL_NONE, |
| }; |
| |
| static struct fb_info fb_info; |
| static u32 pseudo_palette[17]; |
| |
| static int inverse = 0; |
| static int mtrr = 0; |
| |
| static int pmi_setpal = 0; /* pmi for palette changes ??? */ |
| static int ypan = 0; /* 0..nothing, 1..ypan, 2..ywrap */ |
| static unsigned short *pmi_base = 0; |
| static void (*pmi_start)(void); |
| static void (*pmi_pal)(void); |
| |
| /* --------------------------------------------------------------------- */ |
| |
| static int vesafb_pan_display(struct fb_var_screeninfo *var, |
| struct fb_info *info) |
| { |
| int offset; |
| |
| if (!ypan) |
| return -EINVAL; |
| if (var->xoffset) |
| return -EINVAL; |
| if (var->yoffset > var->yres_virtual) |
| return -EINVAL; |
| if ((ypan==1) && var->yoffset+var->yres > var->yres_virtual) |
| return -EINVAL; |
| |
| offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; |
| |
| __asm__ __volatile__( |
| "call *(%%edi)" |
| : /* no return value */ |
| : "a" (0x4f07), /* EAX */ |
| "b" (0), /* EBX */ |
| "c" (offset), /* ECX */ |
| "d" (offset >> 16), /* EDX */ |
| "D" (&pmi_start)); /* EDI */ |
| return 0; |
| } |
| |
| static void vesa_setpalette(int regno, unsigned red, unsigned green, unsigned blue) |
| { |
| struct { u_char blue, green, red, pad; } entry; |
| |
| if (pmi_setpal) { |
| entry.red = red >> 10; |
| entry.green = green >> 10; |
| entry.blue = blue >> 10; |
| entry.pad = 0; |
| __asm__ __volatile__( |
| "call *(%%esi)" |
| : /* no return value */ |
| : "a" (0x4f09), /* EAX */ |
| "b" (0), /* EBX */ |
| "c" (1), /* ECX */ |
| "d" (regno), /* EDX */ |
| "D" (&entry), /* EDI */ |
| "S" (&pmi_pal)); /* ESI */ |
| } else { |
| /* without protected mode interface, try VGA registers... */ |
| outb_p(regno, dac_reg); |
| outb_p(red >> 10, dac_val); |
| outb_p(green >> 10, dac_val); |
| outb_p(blue >> 10, dac_val); |
| } |
| } |
| |
| static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green, |
| unsigned blue, unsigned transp, |
| struct fb_info *info) |
| { |
| /* |
| * Set a single color register. The values supplied are |
| * already rounded down to the hardware's capabilities |
| * (according to the entries in the `var' structure). Return |
| * != 0 for invalid regno. |
| */ |
| |
| if (regno >= info->cmap.len) |
| return 1; |
| |
| switch (info->var.bits_per_pixel) { |
| case 8: |
| vesa_setpalette(regno,red,green,blue); |
| break; |
| case 16: |
| if (info->var.red.offset == 10) { |
| /* 1:5:5:5 */ |
| ((u32*) (info->pseudo_palette))[regno] = |
| ((red & 0xf800) >> 1) | |
| ((green & 0xf800) >> 6) | |
| ((blue & 0xf800) >> 11); |
| } else { |
| /* 0:5:6:5 */ |
| ((u32*) (info->pseudo_palette))[regno] = |
| ((red & 0xf800) ) | |
| ((green & 0xfc00) >> 5) | |
| ((blue & 0xf800) >> 11); |
| } |
| break; |
| case 24: |
| red >>= 8; |
| green >>= 8; |
| blue >>= 8; |
| ((u32 *)(info->pseudo_palette))[regno] = |
| (red << info->var.red.offset) | |
| (green << info->var.green.offset) | |
| (blue << info->var.blue.offset); |
| break; |
| case 32: |
| red >>= 8; |
| green >>= 8; |
| blue >>= 8; |
| ((u32 *)(info->pseudo_palette))[regno] = |
| (red << info->var.red.offset) | |
| (green << info->var.green.offset) | |
| (blue << info->var.blue.offset); |
| break; |
| } |
| return 0; |
| } |
| |
| static struct fb_ops vesafb_ops = { |
| .owner = THIS_MODULE, |
| .fb_setcolreg = vesafb_setcolreg, |
| .fb_pan_display = vesafb_pan_display, |
| .fb_fillrect = cfb_fillrect, |
| .fb_copyarea = cfb_copyarea, |
| .fb_imageblit = cfb_imageblit, |
| .fb_cursor = soft_cursor, |
| }; |
| |
| int __init vesafb_setup(char *options) |
| { |
| char *this_opt; |
| |
| if (!options || !*options) |
| return 0; |
| |
| while ((this_opt = strsep(&options, ",")) != NULL) { |
| if (!*this_opt) continue; |
| |
| if (! strcmp(this_opt, "inverse")) |
| inverse=1; |
| else if (! strcmp(this_opt, "redraw")) |
| ypan=0; |
| else if (! strcmp(this_opt, "ypan")) |
| ypan=1; |
| else if (! strcmp(this_opt, "ywrap")) |
| ypan=2; |
| else if (! strcmp(this_opt, "vgapal")) |
| pmi_setpal=0; |
| else if (! strcmp(this_opt, "pmipal")) |
| pmi_setpal=1; |
| else if (! strcmp(this_opt, "mtrr")) |
| mtrr=1; |
| } |
| return 0; |
| } |
| |
| int __init vesafb_init(void) |
| { |
| int video_cmap_len; |
| int i; |
| |
| if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB) |
| return -ENXIO; |
| |
| vesafb_fix.smem_start = screen_info.lfb_base; |
| vesafb_defined.bits_per_pixel = screen_info.lfb_depth; |
| if (15 == vesafb_defined.bits_per_pixel) |
| vesafb_defined.bits_per_pixel = 16; |
| vesafb_defined.xres = screen_info.lfb_width; |
| vesafb_defined.yres = screen_info.lfb_height; |
| vesafb_fix.line_length = screen_info.lfb_linelength; |
| vesafb_fix.smem_len = screen_info.lfb_size * 65536; |
| vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ? |
| FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; |
| |
| if (!request_mem_region(vesafb_fix.smem_start, vesafb_fix.smem_len, "vesafb")) { |
| printk(KERN_WARNING |
| "vesafb: abort, cannot reserve video memory at 0x%lx\n", |
| vesafb_fix.smem_start); |
| /* We cannot make this fatal. Sometimes this comes from magic |
| spaces our resource handlers simply don't know about */ |
| } |
| |
| fb_info.screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len); |
| if (!fb_info.screen_base) { |
| release_mem_region(vesafb_fix.smem_start, vesafb_fix.smem_len); |
| printk(KERN_ERR |
| "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", |
| vesafb_fix.smem_len, vesafb_fix.smem_start); |
| return -EIO; |
| } |
| |
| printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, size %dk\n", |
| vesafb_fix.smem_start, fb_info.screen_base, vesafb_fix.smem_len/1024); |
| printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n", |
| vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages); |
| |
| if (screen_info.vesapm_seg) { |
| printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n", |
| screen_info.vesapm_seg,screen_info.vesapm_off); |
| } |
| |
| if (screen_info.vesapm_seg < 0xc000) |
| ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */ |
| |
| if (ypan || pmi_setpal) { |
| pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off); |
| pmi_start = (void*)((char*)pmi_base + pmi_base[1]); |
| pmi_pal = (void*)((char*)pmi_base + pmi_base[2]); |
| printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal); |
| if (pmi_base[3]) { |
| printk(KERN_INFO "vesafb: pmi: ports = "); |
| for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++) |
| printk("%x ",pmi_base[i]); |
| printk("\n"); |
| if (pmi_base[i] != 0xffff) { |
| /* |
| * memory areas not supported (yet?) |
| * |
| * Rules are: we have to set up a descriptor for the requested |
| * memory area and pass it in the ES register to the BIOS function. |
| */ |
| printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n"); |
| ypan = pmi_setpal = 0; |
| } |
| } |
| } |
| |
| vesafb_defined.xres_virtual = vesafb_defined.xres; |
| vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length; |
| if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) { |
| printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n", |
| (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual); |
| } else { |
| printk(KERN_INFO "vesafb: scrolling: redraw\n"); |
| vesafb_defined.yres_virtual = vesafb_defined.yres; |
| ypan = 0; |
| } |
| |
| /* some dummy values for timing to make fbset happy */ |
| vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres; |
| vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8; |
| vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8; |
| |
| if (vesafb_defined.bits_per_pixel > 8) { |
| vesafb_defined.red.offset = screen_info.red_pos; |
| vesafb_defined.red.length = screen_info.red_size; |
| vesafb_defined.green.offset = screen_info.green_pos; |
| vesafb_defined.green.length = screen_info.green_size; |
| vesafb_defined.blue.offset = screen_info.blue_pos; |
| vesafb_defined.blue.length = screen_info.blue_size; |
| vesafb_defined.transp.offset = screen_info.rsvd_pos; |
| vesafb_defined.transp.length = screen_info.rsvd_size; |
| printk(KERN_INFO "vesafb: directcolor: " |
| "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", |
| screen_info.rsvd_size, |
| screen_info.red_size, |
| screen_info.green_size, |
| screen_info.blue_size, |
| screen_info.rsvd_pos, |
| screen_info.red_pos, |
| screen_info.green_pos, |
| screen_info.blue_pos); |
| video_cmap_len = 16; |
| } else { |
| vesafb_defined.red.length = 6; |
| vesafb_defined.green.length = 6; |
| vesafb_defined.blue.length = 6; |
| video_cmap_len = 256; |
| } |
| |
| vesafb_fix.ypanstep = ypan ? 1 : 0; |
| vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0; |
| |
| /* request failure does not faze us, as vgacon probably has this |
| * region already (FIXME) */ |
| request_region(0x3c0, 32, "vesafb"); |
| |
| if (mtrr) { |
| int temp_size = vesafb_fix.smem_len; |
| /* Find the largest power-of-two */ |
| while (temp_size & (temp_size - 1)) |
| temp_size &= (temp_size - 1); |
| |
| /* Try and find a power of two to add */ |
| while (temp_size && mtrr_add(vesafb_fix.smem_start, temp_size, MTRR_TYPE_WRCOMB, 1)==-EINVAL) { |
| temp_size >>= 1; |
| } |
| } |
| |
| fb_info.node = NODEV; |
| fb_info.fbops = &vesafb_ops; |
| fb_info.var = vesafb_defined; |
| fb_info.fix = vesafb_fix; |
| fb_info.pseudo_palette = pseudo_palette; |
| fb_info.flags = FBINFO_FLAG_DEFAULT; |
| |
| fb_alloc_cmap(&fb_info.cmap, video_cmap_len, 0); |
| |
| if (register_framebuffer(&fb_info)<0) |
| return -EINVAL; |
| |
| printk(KERN_INFO "fb%d: %s frame buffer device\n", |
| minor(fb_info.node), fb_info.fix.id); |
| return 0; |
| } |
| |
| /* |
| * Overrides for Emacs so that we follow Linus's tabbing style. |
| * --------------------------------------------------------------------------- |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |
| |
| MODULE_LICENSE("GPL"); |
