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341 lines
9.1 KiB
341 lines
9.1 KiB
/*
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* framebuffer driver for Intel Based Mac's
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*
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* (c) 2006 Edgar Hucek <gimli@dark-green.com>
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* Original imac driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
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*
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*/
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/fb.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/module.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/slab.h>
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#include <linux/string.h>
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#include <asm/io.h>
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#include <video/vga.h>
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typedef enum _MAC_TYPE {
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M_I17,
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M_I20,
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M_MINI,
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M_MACBOOK,
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M_NEW
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} MAC_TYPE;
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/* --------------------------------------------------------------------- */
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static struct fb_var_screeninfo imacfb_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 imacfb_fix __initdata = {
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.id = "IMAC 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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static int inverse;
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static int model = M_NEW;
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static int manual_height;
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static int manual_width;
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#define DEFAULT_FB_MEM 1024*1024*16
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/* --------------------------------------------------------------------- */
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static int imacfb_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 imacfb_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = imacfb_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 imacfb_setup(char *options)
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{
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char *this_opt;
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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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if (!strcmp(this_opt, "inverse"))
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inverse = 1;
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else if (!strcmp(this_opt, "i17"))
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model = M_I17;
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else if (!strcmp(this_opt, "i20"))
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model = M_I20;
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else if (!strcmp(this_opt, "mini"))
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model = M_MINI;
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else if (!strcmp(this_opt, "macbook"))
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model = M_MACBOOK;
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else if (!strncmp(this_opt, "height:", 7))
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manual_height = simple_strtoul(this_opt+7, NULL, 0);
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else if (!strncmp(this_opt, "width:", 6))
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manual_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 imacfb_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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screen_info.lfb_depth = 32;
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screen_info.lfb_size = DEFAULT_FB_MEM / 0x10000;
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screen_info.pages=1;
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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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switch (model) {
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case M_I17:
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screen_info.lfb_width = 1440;
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screen_info.lfb_height = 900;
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screen_info.lfb_linelength = 1472 * 4;
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screen_info.lfb_base = 0x80010000;
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break;
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case M_NEW:
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case M_I20:
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screen_info.lfb_width = 1680;
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screen_info.lfb_height = 1050;
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screen_info.lfb_linelength = 1728 * 4;
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screen_info.lfb_base = 0x80010000;
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break;
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case M_MINI:
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screen_info.lfb_width = 1024;
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screen_info.lfb_height = 768;
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screen_info.lfb_linelength = 2048 * 4;
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screen_info.lfb_base = 0x80000000;
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break;
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case M_MACBOOK:
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screen_info.lfb_width = 1280;
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screen_info.lfb_height = 800;
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screen_info.lfb_linelength = 2048 * 4;
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screen_info.lfb_base = 0x80000000;
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break;
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}
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/* if the user wants to manually specify height/width,
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we will override the defaults */
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/* TODO: eventually get auto-detection working */
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if (manual_height > 0)
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screen_info.lfb_height = manual_height;
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if (manual_width > 0)
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screen_info.lfb_width = manual_width;
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imacfb_fix.smem_start = screen_info.lfb_base;
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imacfb_defined.bits_per_pixel = screen_info.lfb_depth;
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imacfb_defined.xres = screen_info.lfb_width;
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imacfb_defined.yres = screen_info.lfb_height;
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imacfb_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 = imacfb_defined.yres * imacfb_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 * 65536;
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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 imacfb. 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_vmode)
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size_remap = size_vmode;
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if (size_remap > size_total)
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size_remap = size_total;
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imacfb_fix.smem_len = size_remap;
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if (!request_mem_region(imacfb_fix.smem_start, size_total, "imacfb")) {
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printk(KERN_WARNING
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"imacfb: cannot reserve video memory at 0x%lx\n",
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imacfb_fix.smem_start);
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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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}
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info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
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if (!info) {
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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(imacfb_fix.smem_start, imacfb_fix.smem_len);
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if (!info->screen_base) {
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printk(KERN_ERR "imacfb: abort, cannot ioremap video memory "
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"0x%x @ 0x%lx\n",
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imacfb_fix.smem_len, imacfb_fix.smem_start);
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err = -EIO;
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goto err_unmap;
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}
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printk(KERN_INFO "imacfb: framebuffer at 0x%lx, mapped to 0x%p, "
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"using %dk, total %dk\n",
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imacfb_fix.smem_start, info->screen_base,
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size_remap/1024, size_total/1024);
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printk(KERN_INFO "imacfb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
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imacfb_defined.xres, imacfb_defined.yres,
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imacfb_defined.bits_per_pixel, imacfb_fix.line_length,
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screen_info.pages);
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imacfb_defined.xres_virtual = imacfb_defined.xres;
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imacfb_defined.yres_virtual = imacfb_fix.smem_len /
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imacfb_fix.line_length;
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printk(KERN_INFO "imacfb: scrolling: redraw\n");
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imacfb_defined.yres_virtual = imacfb_defined.yres;
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/* some dummy values for timing to make fbset happy */
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imacfb_defined.pixclock = 10000000 / imacfb_defined.xres *
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1000 / imacfb_defined.yres;
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imacfb_defined.left_margin = (imacfb_defined.xres / 8) & 0xf8;
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imacfb_defined.hsync_len = (imacfb_defined.xres / 8) & 0xf8;
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imacfb_defined.red.offset = screen_info.red_pos;
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imacfb_defined.red.length = screen_info.red_size;
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imacfb_defined.green.offset = screen_info.green_pos;
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imacfb_defined.green.length = screen_info.green_size;
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imacfb_defined.blue.offset = screen_info.blue_pos;
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imacfb_defined.blue.length = screen_info.blue_size;
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imacfb_defined.transp.offset = screen_info.rsvd_pos;
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imacfb_defined.transp.length = screen_info.rsvd_size;
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printk(KERN_INFO "imacfb: %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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imacfb_fix.ypanstep = 0;
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imacfb_fix.ywrapstep = 0;
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/* request failure does not faze us, as vgacon probably has this
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* region already (FIXME) */
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request_region(0x3c0, 32, "imacfb");
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info->fbops = &imacfb_ops;
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info->var = imacfb_defined;
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info->fix = imacfb_fix;
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info->flags = FBINFO_FLAG_DEFAULT;
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if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
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err = -ENOMEM;
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goto err_unmap;
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}
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if (register_framebuffer(info)<0) {
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err = -EINVAL;
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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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framebuffer_release(info);
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err_release_mem:
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release_mem_region(imacfb_fix.smem_start, size_total);
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return err;
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}
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static struct platform_driver imacfb_driver = {
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.probe = imacfb_probe,
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.driver = {
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.name = "imacfb",
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},
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};
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static struct platform_device imacfb_device = {
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.name = "imacfb",
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};
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static int __init imacfb_init(void)
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{
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int ret;
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char *option = NULL;
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/* ignore error return of fb_get_options */
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fb_get_options("imacfb", &option);
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imacfb_setup(option);
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ret = platform_driver_register(&imacfb_driver);
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if (!ret) {
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ret = platform_device_register(&imacfb_device);
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if (ret)
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platform_driver_unregister(&imacfb_driver);
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}
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return ret;
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}
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module_init(imacfb_init);
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MODULE_LICENSE("GPL");
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