/* * framebuffer driver for Intel Based Mac's * * (c) 2006 Edgar Hucek <gimli@dark-green.com> * Original imac driver written by 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 <linux/platform_device.h> #include <video/vga.h> #include <asm/io.h> #include <asm/mtrr.h> #define dac_reg (0x3c8) #define dac_val (0x3c9) typedef enum _MAC_TAPE { M_I17, M_I20, M_MINI, M_NEW } MAC_TAPE; /* --------------------------------------------------------------------- */ static struct fb_var_screeninfo imacfb_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 imacfb_fix __initdata = { .id = "IMAC VGA", .type = FB_TYPE_PACKED_PIXELS, .accel = FB_ACCEL_NONE, }; static int inverse = 0; static int mtrr = 0; /* disable mtrr */ static int vram_remap __initdata = 0; /* Set amount of memory to be used */ static int vram_total __initdata = 0; /* Set total amount of memory */ static int depth; static int model = M_NEW; static int manual_height = 0; static int manual_width = 0; /* --------------------------------------------------------------------- */ static int imacfb_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 && info->var.bits_per_pixel != 8) { switch (info->var.bits_per_pixel) { 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: 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 imacfb_ops = { .owner = THIS_MODULE, .fb_setcolreg = imacfb_setcolreg, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; static int __init imacfb_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 (! strncmp(this_opt, "mtrr:", 5)) mtrr = simple_strtoul(this_opt+5, NULL, 0); else if (! strcmp(this_opt, "nomtrr")) mtrr=0; else if (! strncmp(this_opt, "vtotal:", 7)) vram_total = simple_strtoul(this_opt+7, NULL, 0); else if (! strncmp(this_opt, "vremap:", 7)) vram_remap = simple_strtoul(this_opt+7, NULL, 0); else if (! strcmp(this_opt, "i17")) model = M_I17; else if (! strcmp(this_opt, "i20")) model = M_I20; else if (! strcmp(this_opt, "mini")) model = M_MINI; else if (! strncmp(this_opt, "height:", 7)) manual_height = simple_strtoul(this_opt+7, NULL, 0); else if (! strncmp(this_opt, "width:", 6)) manual_width = simple_strtoul(this_opt+6, NULL, 0); } return 0; } #define DEFAULT_FB_MEM 1024*1024*16 static int __init imacfb_probe(struct platform_device *dev) { struct fb_info *info; int err; unsigned int size_vmode; unsigned int size_remap; unsigned int size_total; screen_info.lfb_base = 0x80010000; screen_info.lfb_depth = 32; screen_info.lfb_size = DEFAULT_FB_MEM / 0x10000; screen_info.pages=1; 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; switch(model) { case M_I17: screen_info.lfb_width = 1440; screen_info.lfb_height = 900; screen_info.lfb_linelength = 1472 * 4; break; case M_NEW: case M_I20: screen_info.lfb_width = 1680; screen_info.lfb_height = 1050; screen_info.lfb_linelength = 1728 * 4; break; case M_MINI: screen_info.lfb_width = 1024; screen_info.lfb_height = 768; screen_info.lfb_linelength = 2048 * 4; break; } /* if the user wants to manually specify height/width, we will override the defaults */ /* TODO: eventually get auto-detection working */ if(manual_height > 0) screen_info.lfb_height = manual_height; if(manual_width > 0) screen_info.lfb_width = manual_width; /* static void *videomemory; static u_long videomemorysize = (64*1024*1024); videomemory = ioremap(0x80000000,videomemorysize); memset(videomemory, 0x99, videomemorysize); */ imacfb_fix.smem_start = screen_info.lfb_base; imacfb_defined.bits_per_pixel = screen_info.lfb_depth; if (15 == imacfb_defined.bits_per_pixel) imacfb_defined.bits_per_pixel = 16; imacfb_defined.xres = screen_info.lfb_width; imacfb_defined.yres = screen_info.lfb_height; imacfb_fix.line_length = screen_info.lfb_linelength; imacfb_fix.visual = (imacfb_defined.bits_per_pixel == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; /* 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 = imacfb_defined.yres * imacfb_fix.line_length; /* size_total -- all video memory we have. Used for mtrr * entries, ressource allocation and bounds * checking. */ size_total = screen_info.lfb_size * 65536; if (vram_total) size_total = vram_total * 1024 * 1024; if (size_total < size_vmode) size_total = size_vmode; /* size_remap -- the amount of video memory we are going to * use for imacfb. 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 (vram_remap) size_remap = vram_remap * 1024 * 1024; if (size_remap < size_vmode) size_remap = size_vmode; if (size_remap > size_total) size_remap = size_total; imacfb_fix.smem_len = size_remap; #ifndef __i386__ screen_info.imacpm_seg = 0; #endif if (!request_mem_region(imacfb_fix.smem_start, size_total, "imacfb")) { printk(KERN_WARNING "imacfb: cannot reserve video memory at 0x%lx\n", imacfb_fix.smem_start); /* We cannot make this fatal. Sometimes this comes from magic spaces our resource handlers simply don't know about */ } info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev); if (!info) { release_mem_region(imacfb_fix.smem_start, size_total); return -ENOMEM; } info->pseudo_palette = info->par; info->par = NULL; info->screen_base = ioremap(imacfb_fix.smem_start, imacfb_fix.smem_len); if (!info->screen_base) { printk(KERN_ERR "imacfb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", imacfb_fix.smem_len, imacfb_fix.smem_start); err = -EIO; goto err; } printk(KERN_INFO "imacfb: framebuffer at 0x%lx, mapped to 0x%p, " "using %dk, total %dk\n", imacfb_fix.smem_start, info->screen_base, size_remap/1024, size_total/1024); printk(KERN_INFO "imacfb: mode is %dx%dx%d, linelength=%d, pages=%d\n", imacfb_defined.xres, imacfb_defined.yres, imacfb_defined.bits_per_pixel, imacfb_fix.line_length, screen_info.pages); imacfb_defined.xres_virtual = imacfb_defined.xres; imacfb_defined.yres_virtual = imacfb_fix.smem_len / imacfb_fix.line_length; printk(KERN_INFO "imacfb: scrolling: redraw\n"); imacfb_defined.yres_virtual = imacfb_defined.yres; /* some dummy values for timing to make fbset happy */ imacfb_defined.pixclock = 10000000 / imacfb_defined.xres * 1000 / imacfb_defined.yres; imacfb_defined.left_margin = (imacfb_defined.xres / 8) & 0xf8; imacfb_defined.hsync_len = (imacfb_defined.xres / 8) & 0xf8; imacfb_defined.red.offset = screen_info.red_pos; imacfb_defined.red.length = screen_info.red_size; imacfb_defined.green.offset = screen_info.green_pos; imacfb_defined.green.length = screen_info.green_size; imacfb_defined.blue.offset = screen_info.blue_pos; imacfb_defined.blue.length = screen_info.blue_size; imacfb_defined.transp.offset = screen_info.rsvd_pos; imacfb_defined.transp.length = screen_info.rsvd_size; if (imacfb_defined.bits_per_pixel <= 8) { depth = imacfb_defined.green.length; imacfb_defined.red.length = imacfb_defined.green.length = imacfb_defined.blue.length = imacfb_defined.bits_per_pixel; } printk(KERN_INFO "imacfb: %s: " "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", (imacfb_defined.bits_per_pixel > 8) ? "Truecolor" : "Pseudocolor", 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); imacfb_fix.ypanstep = 0; imacfb_fix.ywrapstep = 0; /* request failure does not faze us, as vgacon probably has this * region already (FIXME) */ request_region(0x3c0, 32, "imacfb"); #ifdef CONFIG_MTRR if (mtrr) { unsigned int temp_size = size_total; unsigned int type = 0; switch (mtrr) { case 1: type = MTRR_TYPE_UNCACHABLE; break; case 2: type = MTRR_TYPE_WRBACK; break; case 3: type = MTRR_TYPE_WRCOMB; break; case 4: type = MTRR_TYPE_WRTHROUGH; break; default: type = 0; break; } if (type) { int rc; /* 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 */ do { rc = mtrr_add(imacfb_fix.smem_start, temp_size, type, 1); temp_size >>= 1; } while (temp_size >= PAGE_SIZE && rc == -EINVAL); } } #endif info->fbops = &imacfb_ops; info->var = imacfb_defined; info->fix = imacfb_fix; info->flags = FBINFO_FLAG_DEFAULT; if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { err = -ENOMEM; goto err; } if (register_framebuffer(info)<0) { err = -EINVAL; fb_dealloc_cmap(&info->cmap); goto err; } printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); return 0; err: framebuffer_release(info); release_mem_region(imacfb_fix.smem_start, size_total); return err; } static struct platform_driver imacfb_driver = { .probe = imacfb_probe, .driver = { .name = "imacfb", }, }; static struct platform_device imacfb_device = { .name = "imacfb", }; static int __init imacfb_init(void) { int ret; char *option = NULL; /* ignore error return of fb_get_options */ fb_get_options("imacfb", &option); imacfb_setup(option); ret = platform_driver_register(&imacfb_driver); if (!ret) { ret = platform_device_register(&imacfb_device); if (ret) platform_driver_unregister(&imacfb_driver); } return ret; } module_init(imacfb_init); MODULE_LICENSE("GPL");