1/* $Id: g364fb.c,v 1.1.1.1 2007/08/03 18:53:03 Exp $ 2 * 3 * linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device 4 * 5 * (C) 1998 Thomas Bogendoerfer 6 * 7 * This driver is based on tgafb.c 8 * 9 * Copyright (C) 1997 Geert Uytterhoeven 10 * Copyright (C) 1995 Jay Estabrook 11 * 12 * This file is subject to the terms and conditions of the GNU General Public 13 * License. See the file COPYING in the main directory of this archive for 14 * more details. 15 */ 16 17#include <linux/module.h> 18#include <linux/console.h> 19#include <linux/kernel.h> 20#include <linux/errno.h> 21#include <linux/string.h> 22#include <linux/mm.h> 23#include <linux/slab.h> 24#include <linux/vmalloc.h> 25#include <linux/delay.h> 26#include <linux/interrupt.h> 27#include <linux/fb.h> 28#include <linux/init.h> 29#include <asm/io.h> 30#include <asm/jazz.h> 31 32/* 33 * Various defines for the G364 34 */ 35#define G364_MEM_BASE 0xe4400000 36#define G364_PORT_BASE 0xe4000000 37#define ID_REG 0xe4000000 /* Read only */ 38#define BOOT_REG 0xe4080000 39#define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */ 40#define DISPLAY_REG 0xe4080118 41#define VDISPLAY_REG 0xe4080150 42#define MASK_REG 0xe4080200 43#define CTLA_REG 0xe4080300 44#define CURS_TOGGLE 0x800000 45#define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */ 46#define DELAY_SAMPLE 0x080000 47#define PORT_INTER 0x040000 48#define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */ 49#define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */ 50#define TR_CYCLE_TOG 0x004000 51#define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */ 52#define BLANK_OFF 0x000800 53#define FORCE_BLANK 0x000400 54#define BLK_FUN_SWTCH 0x000200 55#define BLANK_IO 0x000100 56#define BLANK_LEVEL 0x000080 57#define A_VID_FORM 0x000040 58#define D_SYNC_FORM 0x000020 59#define FRAME_FLY_PAT 0x000010 60#define OP_MODE 0x000008 61#define INTL_STAND 0x000004 62#define SCRN_FORM 0x000002 63#define ENABLE_VTG 0x000001 64#define TOP_REG 0xe4080400 65#define CURS_PAL_REG 0xe4080508 /* to 0x080518 */ 66#define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */ 67#define CURS_POS_REG 0xe4080638 68#define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */ 69#define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */ 70#define MON_ID_REG 0xe4100000 /* unused */ 71#define RESET_REG 0xe4180000 /* Write only */ 72 73static struct fb_info fb_info; 74 75static struct fb_fix_screeninfo fb_fix __initdata = { 76 .id = "G364 8plane", 77 .smem_start = 0x40000000, /* physical address */ 78 .type = FB_TYPE_PACKED_PIXELS, 79 .visual = FB_VISUAL_PSEUDOCOLOR, 80 .ypanstep = 1, 81 .accel = FB_ACCEL_NONE, 82}; 83 84static struct fb_var_screeninfo fb_var __initdata = { 85 .bits_per_pixel = 8, 86 .red = { 0, 8, 0 }, 87 .green = { 0, 8, 0 }, 88 .blue = { 0, 8, 0 }, 89 .activate = FB_ACTIVATE_NOW, 90 .height = -1, 91 .width = -1, 92 .pixclock = 39722, 93 .left_margin = 40, 94 .right_margin = 24, 95 .upper_margin = 32, 96 .lower_margin = 11, 97 .hsync_len = 96, 98 .vsync_len = 2, 99 .vmode = FB_VMODE_NONINTERLACED, 100}; 101 102/* 103 * Interface used by the world 104 */ 105int g364fb_init(void); 106 107static int g364fb_pan_display(struct fb_var_screeninfo *var, 108 struct fb_info *info); 109static int g364fb_setcolreg(u_int regno, u_int red, u_int green, 110 u_int blue, u_int transp, 111 struct fb_info *info); 112static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor); 113static int g364fb_blank(int blank, struct fb_info *info); 114 115static struct fb_ops g364fb_ops = { 116 .owner = THIS_MODULE, 117 .fb_setcolreg = g364fb_setcolreg, 118 .fb_pan_display = g364fb_pan_display, 119 .fb_blank = g364fb_blank, 120 .fb_fillrect = cfb_fillrect, 121 .fb_copyarea = cfb_copyarea, 122 .fb_imageblit = cfb_imageblit, 123 .fb_cursor = g364fb_cursor, 124}; 125 126int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor) 127{ 128 129 switch (cursor->enable) { 130 case CM_ERASE: 131 *(unsigned int *) CTLA_REG |= CURS_TOGGLE; 132 break; 133 134 case CM_MOVE: 135 case CM_DRAW: 136 *(unsigned int *) CTLA_REG &= ~CURS_TOGGLE; 137 *(unsigned int *) CURS_POS_REG = 138 ((x * fontwidth(p)) << 12) | ((y * fontheight(p)) - 139 info->var.yoffset); 140 break; 141 } 142 return 0; 143} 144 145/* 146 * Pan or Wrap the Display 147 * 148 * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag 149 */ 150static int g364fb_pan_display(struct fb_var_screeninfo *var, 151 struct fb_info *info) 152{ 153 if (var->xoffset || var->yoffset + var->yres > var->yres_virtual) 154 return -EINVAL; 155 156 *(unsigned int *) TOP_REG = var->yoffset * var->xres; 157 return 0; 158} 159 160/* 161 * Blank the display. 162 */ 163static int g364fb_blank(int blank, struct fb_info *info) 164{ 165 if (blank) 166 *(unsigned int *) CTLA_REG |= FORCE_BLANK; 167 else 168 *(unsigned int *) CTLA_REG &= ~FORCE_BLANK; 169 return 0; 170} 171 172/* 173 * Set a single color register. Return != 0 for invalid regno. 174 */ 175static int g364fb_setcolreg(u_int regno, u_int red, u_int green, 176 u_int blue, u_int transp, struct fb_info *info) 177{ 178 volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG; 179 180 if (regno > 255) 181 return 1; 182 183 red >>= 8; 184 green >>= 8; 185 blue >>= 8; 186 187 ptr[regno << 1] = (red << 16) | (green << 8) | blue; 188 189 return 0; 190} 191 192/* 193 * Initialisation 194 */ 195int __init g364fb_init(void) 196{ 197 volatile unsigned int *pal_ptr = 198 (volatile unsigned int *) CLR_PAL_REG; 199 volatile unsigned int *curs_pal_ptr = 200 (volatile unsigned int *) CURS_PAL_REG; 201 int mem, i, j; 202 203 if (fb_get_options("g364fb", NULL)) 204 return -ENODEV; 205 206 /* TBD: G364 detection */ 207 208 /* get the resolution set by ARC console */ 209 *(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG; 210 fb_var.xres = 211 (*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4; 212 fb_var.yres = 213 (*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2; 214 *(volatile unsigned int *) CTLA_REG |= ENABLE_VTG; 215 216 /* setup cursor */ 217 curs_pal_ptr[0] |= 0x00ffffff; 218 curs_pal_ptr[2] |= 0x00ffffff; 219 curs_pal_ptr[4] |= 0x00ffffff; 220 221 /* 222 * first set the whole cursor to transparent 223 */ 224 for (i = 0; i < 512; i++) 225 *(unsigned short *) (CURS_PAT_REG + i * 8) = 0; 226 227 /* 228 * switch the last two lines to cursor palette 3 229 * we assume here, that FONTSIZE_X is 8 230 */ 231 *(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff; 232 *(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff; 233 fb_var.xres_virtual = fbvar.xres; 234 fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel; 235 fb_fix.smem_start = 0x40000000; /* physical address */ 236 /* get size of video memory; this is special for the JAZZ hardware */ 237 mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3; 238 fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024; 239 fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres; 240 241 fb_info.fbops = &g364fb_ops; 242 fb_info.screen_base = (char *) G364_MEM_BASE; /* virtual kernel address */ 243 fb_info.var = fb_var; 244 fb_info.fix = fb_fix; 245 fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; 246 247 fb_alloc_cmap(&fb_info.cmap, 255, 0); 248 249 if (register_framebuffer(&fb_info) < 0) 250 return -EINVAL; 251 return 0; 252} 253 254module_init(g364fb_init); 255MODULE_LICENSE("GPL"); 256