/* * linux/drivers/video/pmagb-b-fb.c * * PMAGB-B TurboChannel framebuffer card support ... derived from: * "HP300 Topcat framebuffer support (derived from macfb of all things) * Phil Blundell 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 , * Karsten Merker and * Harald Koerfgen. * 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. * */ /* * We currently only support the PMAGB-B in high resolution mode * as I know of no way to detect low resolution mode set via jumper. * KM, 2001/01/07 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct pmagb_b_ramdac_regs { unsigned char addr_low; unsigned char pad0[3]; unsigned char addr_hi; unsigned char pad1[3]; unsigned char data; unsigned char pad2[3]; unsigned char cmap; }; /* * Max 3 TURBOchannel slots -> max 3 PMAGB-B :) */ static struct fb_info pmagbb_fb_info[3]; static struct fb_var_screeninfo pmagbbfb_defined = { .xres = 1280, .yres = 1024, .xres_virtual = 1280, .yres_virtual = 1024, .bits_per_pixel = 8, .red.length = 8, .green.length = 8, .blue.length = 8, .activate = FB_ACTIVATE_NOW, .height = 274, .width = 195, .accel_flags = FB_ACCEL_NONE, .vmode = FB_VMODE_NONINTERLACED, }; static struct fb_fix_screeninfo pmagbafb_fix = { .id = "PMAGB-BA", .smem_len = (1280 * 1024), .type = FB_TYPE_PACKED_PIXELS, .visual = FB_VISUAL_PSEUDOCOLOR, .line_length = 1280, } /* * Turn hardware cursor off */ void pmagbbfb_erase_cursor(struct pmagb_b_ramdac_regs *bt459_regs) { bt459_regs->addr_low = 0; bt459_regs->addr_hi = 3; bt459_regs->data = 0; } /* * Set the palette. */ static int pmagbbfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { struct pmagb_b_ramdac_regs *bt459_regs = (struct pmagb_b_ramdac_regs *) info->par; if (regno >= info->cmap.len) return 1; red >>= 8; /* The cmap fields are 16 bits */ green >>= 8; /* wide, but the harware colormap */ blue >>= 8; /* registers are only 8 bits wide */ bt459_regs->addr_low = (__u8) regno; bt459_regs->addr_hi = 0; bt459_regs->cmap = red; bt459_regs->cmap = green; bt459_regs->cmap = blue; return 0; } static struct fb_ops pmagbbfb_ops = { .owner = THIS_MODULE, .fb_setcolreg = pmagbbfb_setcolreg, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, .fb_cursor = soft_cursor, }; int __init pmagbbfb_init_one(int slot) { unsigned long base_addr = get_tc_base_addr(slot); struct fb_info *info = &pmagbb_fb_info[slot]; printk("PMAGB-BA framebuffer in slot %d\n", slot); /* * Framebuffer display memory base address and friends */ pmagbbfb_fix.smem_start = base_addr + PMAGB_B_ONBOARD_FBMEM_OFFSET; info->par = (base_addr + PMAGB_B_BT459_OFFSET); /* * Configure the Bt459 RAM DAC */ pmagbbfb_erase_cursor((struct pmagb_b_ramdac_regs *) info->par); /* * Let there be consoles.. */ info->fbops = &pmagbbfb_ops; info->var = pmagbbfb_defined; info->fix = pmagbbfb_fix; info->screen_base = pmagbbfb_fix.smem_start; info->flags = FBINFO_DEFAULT; fb_alloc_cmap(&fb_info.cmap, 256, 0); if (register_framebuffer(info) < 0) return 1; return 0; } /* * Initialise the framebuffer */ int __init pmagbbfb_init(void) { int sid; int found = 0; if (fb_get_options("pmagbbfb", NULL)) return -ENODEV; if (TURBOCHANNEL) { while ((sid = search_tc_card("PMAGB-BA")) >= 0) { found = 1; claim_tc_card(sid); pmagbbfb_init_one(sid); } return found ? 0 : -ENODEV; } else { return -ENODEV; } } module_init(pmagbbfb_init); MODULE_LICENSE("GPL");
