/* * linux/drivers/video/maxinefb.c * * DECstation 5000/xx onboard framebuffer support ... derived from: * "HP300 Topcat framebuffer support (derived from macfb of all things) * Phil Blundell <philb@gnu.org> 1998", the original code can be * found in the file hpfb.c in the same directory. * * DECstation related code Copyright (C) 1999,2000,2001 by * Michael Engel <engel@unix-ag.org> and * Karsten Merker <merker@linuxtag.org>. * This file is subject to the terms and conditions of the GNU General * Public License. See the file COPYING in the main directory of this * archive for more details. * */ /* * Changes: * 2001/01/27 removed debugging and testing code, fixed fb_ops * initialization which had caused a crash before, * general cleanup, first official release (KM) * */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.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/init.h> #include <linux/fb.h> #include <video/maxinefb.h> /* bootinfo.h defines the machine type values, needed when checking */ /* whether are really running on a maxine, KM */ #include <asm/bootinfo.h> static struct fb_info fb_info; static struct fb_var_screeninfo maxinefb_defined = { .xres = 1024, .yres = 768, .xres_virtual = 1024, .yres_virtual = 768, .bits_per_pixel =8, .activate = FB_ACTIVATE_NOW, .height = -1, .width = -1, .vmode = FB_VMODE_NONINTERLACED, }; static struct fb_fix_screeninfo maxinefb_fix = { .id = "Maxine", .smem_len = (1024*768), .type = FB_TYPE_PACKED_PIXELS, .visual = FB_VISUAL_PSEUDOCOLOR, .line_length = 1024, }; /* Handle the funny Inmos RamDAC/video controller ... */ void maxinefb_ims332_write_register(int regno, register unsigned int val) { register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS; unsigned char *wptr; wptr = regs + 0xa0000 + (regno << 4); *((volatile unsigned int *) (regs)) = (val >> 8) & 0xff00; *((volatile unsigned short *) (wptr)) = val; } unsigned int maxinefb_ims332_read_register(int regno) { register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS; unsigned char *rptr; register unsigned int j, k; rptr = regs + 0x80000 + (regno << 4); j = *((volatile unsigned short *) rptr); k = *((volatile unsigned short *) regs); return (j & 0xffff) | ((k & 0xff00) << 8); } /* Set the palette */ static int maxinefb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { /* value to be written into the palette reg. */ unsigned long hw_colorvalue = 0; red >>= 8; /* The cmap fields are 16 bits */ green >>= 8; /* wide, but the harware colormap */ blue >>= 8; /* registers are only 8 bits wide */ hw_colorvalue = (blue << 16) + (green << 8) + (red); maxinefb_ims332_write_register(IMS332_REG_COLOR_PALETTE + regno, hw_colorvalue); return 0; } static struct fb_ops maxinefb_ops = { .owner = THIS_MODULE, .fb_setcolreg = maxinefb_setcolreg, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; int __init maxinefb_init(void) { unsigned long fboff; unsigned long fb_start; int i; if (fb_get_options("maxinefb", NULL)) return -ENODEV; /* Validate we're on the proper machine type */ if (mips_machtype != MACH_DS5000_XX) { return -EINVAL; } printk(KERN_INFO "Maxinefb: Personal DECstation detected\n"); printk(KERN_INFO "Maxinefb: initializing onboard framebuffer\n"); /* Framebuffer display memory base address */ fb_start = DS5000_xx_ONBOARD_FBMEM_START; /* Clear screen */ for (fboff = fb_start; fboff < fb_start + 0x1ffff; fboff++) *(volatile unsigned char *)fboff = 0x0; maxinefb_fix.smem_start = fb_start; /* erase hardware cursor */ for (i = 0; i < 512; i++) { maxinefb_ims332_write_register(IMS332_REG_CURSOR_RAM + i, 0); /* if (i&0x8 == 0) maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0x0f); else maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0xf0); */ } fb_info.fbops = &maxinefb_ops; fb_info.screen_base = (char *)maxinefb_fix.smem_start; fb_info.var = maxinefb_defined; fb_info.fix = maxinefb_fix; fb_info.flags = FBINFO_DEFAULT; fb_alloc_cmap(&fb_info.cmap, 256, 0); if (register_framebuffer(&fb_info) < 0) return 1; return 0; } static void __exit maxinefb_exit(void) { unregister_framebuffer(&fb_info); } #ifdef MODULE MODULE_LICENSE("GPL"); #endif module_init(maxinefb_init); module_exit(maxinefb_exit);