426 lines
12 KiB
C
426 lines
12 KiB
C
/*
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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/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/tty.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <video/vga.h>
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#include <asm/io.h>
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#include <asm/mtrr.h>
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#define dac_reg (0x3c8)
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#define dac_val (0x3c9)
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typedef enum _MAC_TAPE {
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M_I17,
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M_I20,
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M_MINI,
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M_NEW
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} MAC_TAPE;
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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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};
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static int inverse = 0;
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static int mtrr = 0; /* disable mtrr */
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static int vram_remap __initdata = 0; /* Set amount of memory to be used */
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static int vram_total __initdata = 0; /* Set total amount of memory */
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static int depth;
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static int model = M_NEW;
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static int manual_height = 0;
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static int manual_width = 0;
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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 && info->var.bits_per_pixel != 8) {
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switch (info->var.bits_per_pixel) {
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case 16:
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if (info->var.red.offset == 10) {
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/* 1:5:5:5 */
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((u32*) (info->pseudo_palette))[regno] =
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((red & 0xf800) >> 1) |
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((green & 0xf800) >> 6) |
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((blue & 0xf800) >> 11);
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} else {
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/* 0:5:6:5 */
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((u32*) (info->pseudo_palette))[regno] =
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((red & 0xf800) ) |
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((green & 0xfc00) >> 5) |
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((blue & 0xf800) >> 11);
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}
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break;
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case 24:
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case 32:
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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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break;
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}
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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 (! strncmp(this_opt, "mtrr:", 5))
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mtrr = simple_strtoul(this_opt+5, NULL, 0);
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else if (! strcmp(this_opt, "nomtrr"))
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mtrr=0;
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else if (! strncmp(this_opt, "vtotal:", 7))
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vram_total = simple_strtoul(this_opt+7, NULL, 0);
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else if (! strncmp(this_opt, "vremap:", 7))
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vram_remap = simple_strtoul(this_opt+7, NULL, 0);
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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 (! 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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#define DEFAULT_FB_MEM 1024*1024*16
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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_base = 0x80010000;
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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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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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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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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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/*
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static void *videomemory;
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static u_long videomemorysize = (64*1024*1024);
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videomemory = ioremap(0x80000000,videomemorysize);
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memset(videomemory, 0x99, videomemorysize);
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*/
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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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if (15 == imacfb_defined.bits_per_pixel)
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imacfb_defined.bits_per_pixel = 16;
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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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imacfb_fix.visual = (imacfb_defined.bits_per_pixel == 8) ?
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FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
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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 mtrr
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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 (vram_total)
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size_total = vram_total * 1024 * 1024;
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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 (vram_remap)
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size_remap = vram_remap * 1024 * 1024;
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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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#ifndef __i386__
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screen_info.imacpm_seg = 0;
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#endif
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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) * 256, &dev->dev);
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if (!info) {
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release_mem_region(imacfb_fix.smem_start, size_total);
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return -ENOMEM;
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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
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"imacfb: abort, cannot ioremap video memory 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;
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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, imacfb_defined.bits_per_pixel, imacfb_fix.line_length, 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 / 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 * 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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if (imacfb_defined.bits_per_pixel <= 8) {
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depth = imacfb_defined.green.length;
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imacfb_defined.red.length =
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imacfb_defined.green.length =
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imacfb_defined.blue.length =
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imacfb_defined.bits_per_pixel;
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}
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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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(imacfb_defined.bits_per_pixel > 8) ?
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"Truecolor" : "Pseudocolor",
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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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#ifdef CONFIG_MTRR
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if (mtrr) {
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unsigned int temp_size = size_total;
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unsigned int type = 0;
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switch (mtrr) {
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case 1:
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type = MTRR_TYPE_UNCACHABLE;
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break;
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case 2:
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type = MTRR_TYPE_WRBACK;
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break;
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case 3:
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type = MTRR_TYPE_WRCOMB;
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break;
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case 4:
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type = MTRR_TYPE_WRTHROUGH;
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break;
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default:
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type = 0;
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break;
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}
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if (type) {
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int rc;
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/* Find the largest power-of-two */
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while (temp_size & (temp_size - 1))
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temp_size &= (temp_size - 1);
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/* Try and find a power of two to add */
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do {
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rc = mtrr_add(imacfb_fix.smem_start, temp_size,
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type, 1);
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temp_size >>= 1;
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} while (temp_size >= PAGE_SIZE && rc == -EINVAL);
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}
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}
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#endif
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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;
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}
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if (register_framebuffer(info)<0) {
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err = -EINVAL;
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fb_dealloc_cmap(&info->cmap);
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goto err;
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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:
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framebuffer_release(info);
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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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