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