/* * Framebuffer driver for EFI/UEFI based system * * (c) 2006 Edgar Hucek <gimli@dark-green.com> * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de> * */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/fb.h> #include <linux/platform_device.h> #include <linux/screen_info.h> #include <linux/dmi.h> #include <video/vga.h> static struct fb_var_screeninfo efifb_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 efifb_fix __initdata = { .id = "EFI VGA", .type = FB_TYPE_PACKED_PIXELS, .accel = FB_ACCEL_NONE, .visual = FB_VISUAL_TRUECOLOR, }; enum { M_I17, /* 17-Inch iMac */ M_I20, /* 20-Inch iMac */ M_I20_SR, /* 20-Inch iMac (Santa Rosa) */ M_I24, /* 24-Inch iMac */ M_MINI, /* Mac Mini */ M_MB, /* MacBook */ M_MB_2, /* MacBook, 2nd rev. */ M_MB_3, /* MacBook, 3rd rev. */ M_MB_SR, /* MacBook, 2nd gen, (Santa Rosa) */ M_MBA, /* MacBook Air */ M_MBP, /* MacBook Pro */ M_MBP_2, /* MacBook Pro 2nd gen */ M_MBP_SR, /* MacBook Pro (Santa Rosa) */ M_MBP_4, /* MacBook Pro, 4th gen */ M_UNKNOWN /* placeholder */ }; static struct efifb_dmi_info { char *optname; unsigned long base; int stride; int width; int height; } dmi_list[] = { [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900 }, [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050 }, /* guess */ [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050 }, [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200 }, /* guess */ [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768 }, [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800 }, [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800 }, [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900 }, [M_MBP_2] = { "mbp2", 0, 0, 0, 0 }, /* placeholder */ [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900 }, [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200 }, [M_UNKNOWN] = { NULL, 0, 0, 0, 0 } }; static int set_system(const struct dmi_system_id *id); #define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \ { set_system, name, { \ DMI_MATCH(DMI_BIOS_VENDOR, vendor), \ DMI_MATCH(DMI_PRODUCT_NAME, name) }, \ &dmi_list[enumid] } static struct dmi_system_id __initdata dmi_system_table[] = { EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17), /* At least one of these two will be right; maybe both? */ EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20), /* At least one of these two will be right; maybe both? */ EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR), EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI), EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB), /* At least one of these two will be right; maybe both? */ EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB), /* At least one of these two will be right; maybe both? */ EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA), EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP), EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2), EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR), EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4), {}, }; static int set_system(const struct dmi_system_id *id) { struct efifb_dmi_info *info = id->driver_data; if (info->base == 0) return -ENODEV; printk(KERN_INFO "efifb: dmi detected %s - framebuffer at %p " "(%dx%d, stride %d)\n", id->ident, (void *)info->base, info->width, info->height, info->stride); /* Trust the bootloader over the DMI tables */ if (screen_info.lfb_base == 0) screen_info.lfb_base = info->base; if (screen_info.lfb_linelength == 0) screen_info.lfb_linelength = info->stride; if (screen_info.lfb_width == 0) screen_info.lfb_width = info->width; if (screen_info.lfb_height == 0) screen_info.lfb_height = info->height; return 0; } static int efifb_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; if (regno < 16) { 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); } return 0; } static struct fb_ops efifb_ops = { .owner = THIS_MODULE, .fb_setcolreg = efifb_setcolreg, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; static int __init efifb_setup(char *options) { char *this_opt; int i; if (!options || !*options) return 0; while ((this_opt = strsep(&options, ",")) != NULL) { if (!*this_opt) continue; for (i = 0; i < M_UNKNOWN; i++) { if (!strcmp(this_opt, dmi_list[i].optname) && dmi_list[i].base != 0) { screen_info.lfb_base = dmi_list[i].base; screen_info.lfb_linelength = dmi_list[i].stride; screen_info.lfb_width = dmi_list[i].width; screen_info.lfb_height = dmi_list[i].height; } } if (!strncmp(this_opt, "base:", 5)) screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); else if (!strncmp(this_opt, "stride:", 7)) screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; else if (!strncmp(this_opt, "height:", 7)) screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); else if (!strncmp(this_opt, "width:", 6)) screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); } return 0; } static int __init efifb_probe(struct platform_device *dev) { struct fb_info *info; int err; unsigned int size_vmode; unsigned int size_remap; unsigned int size_total; int request_succeeded = 0; printk(KERN_INFO "efifb: probing for efifb\n"); if (!screen_info.lfb_depth) screen_info.lfb_depth = 32; if (!screen_info.pages) screen_info.pages = 1; /* just assume they're all unset if any are */ if (!screen_info.blue_size) { screen_info.blue_size = 8; screen_info.blue_pos = 0; screen_info.green_size = 8; screen_info.green_pos = 8; screen_info.red_size = 8; screen_info.red_pos = 16; screen_info.rsvd_size = 8; screen_info.rsvd_pos = 24; } efifb_fix.smem_start = screen_info.lfb_base; efifb_defined.bits_per_pixel = screen_info.lfb_depth; efifb_defined.xres = screen_info.lfb_width; efifb_defined.yres = screen_info.lfb_height; efifb_fix.line_length = screen_info.lfb_linelength; /* size_vmode -- that is the amount of memory needed for the * used video mode, i.e. the minimum amount of * memory we need. */ size_vmode = efifb_defined.yres * efifb_fix.line_length; /* size_total -- all video memory we have. Used for * entries, ressource allocation and bounds * checking. */ size_total = screen_info.lfb_size; if (size_total < size_vmode) size_total = size_vmode; /* size_remap -- the amount of video memory we are going to * use for efifb. With modern cards it is no * option to simply use size_total as that * wastes plenty of kernel address space. */ size_remap = size_vmode * 2; if (size_remap > size_total) size_remap = size_total; if (size_remap % PAGE_SIZE) size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); efifb_fix.smem_len = size_remap; if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { request_succeeded = 1; } else { /* We cannot make this fatal. Sometimes this comes from magic spaces our resource handlers simply don't know about */ printk(KERN_WARNING "efifb: cannot reserve video memory at 0x%lx\n", efifb_fix.smem_start); } info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); if (!info) { printk(KERN_ERR "efifb: cannot allocate framebuffer\n"); err = -ENOMEM; goto err_release_mem; } info->pseudo_palette = info->par; info->par = NULL; info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len); if (!info->screen_base) { printk(KERN_ERR "efifb: abort, cannot ioremap video memory " "0x%x @ 0x%lx\n", efifb_fix.smem_len, efifb_fix.smem_start); err = -EIO; goto err_release_fb; } printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, " "using %dk, total %dk\n", efifb_fix.smem_start, info->screen_base, size_remap/1024, size_total/1024); printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", efifb_defined.xres, efifb_defined.yres, efifb_defined.bits_per_pixel, efifb_fix.line_length, screen_info.pages); efifb_defined.xres_virtual = efifb_defined.xres; efifb_defined.yres_virtual = efifb_fix.smem_len / efifb_fix.line_length; printk(KERN_INFO "efifb: scrolling: redraw\n"); efifb_defined.yres_virtual = efifb_defined.yres; /* some dummy values for timing to make fbset happy */ efifb_defined.pixclock = 10000000 / efifb_defined.xres * 1000 / efifb_defined.yres; efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8; efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8; efifb_defined.red.offset = screen_info.red_pos; efifb_defined.red.length = screen_info.red_size; efifb_defined.green.offset = screen_info.green_pos; efifb_defined.green.length = screen_info.green_size; efifb_defined.blue.offset = screen_info.blue_pos; efifb_defined.blue.length = screen_info.blue_size; efifb_defined.transp.offset = screen_info.rsvd_pos; efifb_defined.transp.length = screen_info.rsvd_size; printk(KERN_INFO "efifb: %s: " "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", "Truecolor", 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); efifb_fix.ypanstep = 0; efifb_fix.ywrapstep = 0; info->fbops = &efifb_ops; info->var = efifb_defined; info->fix = efifb_fix; info->flags = FBINFO_FLAG_DEFAULT; if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) { printk(KERN_ERR "efifb: cannot allocate colormap\n"); goto err_unmap; } if ((err = register_framebuffer(info)) < 0) { printk(KERN_ERR "efifb: cannot register framebuffer\n"); goto err_fb_dealoc; } printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); return 0; err_fb_dealoc: fb_dealloc_cmap(&info->cmap); err_unmap: iounmap(info->screen_base); err_release_fb: framebuffer_release(info); err_release_mem: if (request_succeeded) release_mem_region(efifb_fix.smem_start, size_total); return err; } static struct platform_driver efifb_driver = { .probe = efifb_probe, .driver = { .name = "efifb", }, }; static struct platform_device efifb_device = { .name = "efifb", }; static int __init efifb_init(void) { int ret; char *option = NULL; if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) return -ENODEV; dmi_check_system(dmi_system_table); if (fb_get_options("efifb", &option)) return -ENODEV; efifb_setup(option); /* We don't get linelength from UGA Draw Protocol, only from * EFI Graphics Protocol. So if it's not in DMI, and it's not * passed in from the user, we really can't use the framebuffer. */ if (!screen_info.lfb_linelength) return -ENODEV; ret = platform_driver_register(&efifb_driver); if (!ret) { ret = platform_device_register(&efifb_device); if (ret) platform_driver_unregister(&efifb_driver); } return ret; } module_init(efifb_init); MODULE_LICENSE("GPL");