1 /* 2 * linux/drivers/video/pmag-aa-fb.c 3 * Copyright 2002 Karsten Merker <merker@debian.org> 4 * 5 * PMAG-AA TurboChannel framebuffer card support ... derived from 6 * pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by 7 * Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org> 8 * and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from 9 * "HP300 Topcat framebuffer support (derived from macfb of all things) 10 * Phil Blundell <philb@gnu.org> 1998" 11 * 12 * This file is subject to the terms and conditions of the GNU General 13 * Public License. See the file COPYING in the main directory of this 14 * archive for more details. 15 * 16 * 2002-09-28 Karsten Merker <merker@linuxtag.org> 17 * Version 0.01: First try to get a PMAG-AA running. 18 * 19 * 2003-02-24 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> 20 * Version 0.02: Major code cleanup. 21 * 22 * 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> 23 * Hardware cursor support. 24 */ 25 #include <linux/module.h> 26 #include <linux/kernel.h> 27 #include <linux/errno.h> 28 #include <linux/string.h> 29 #include <linux/timer.h> 30 #include <linux/mm.h> 31 #include <linux/delay.h> 32 #include <linux/init.h> 33 #include <linux/fb.h> 34 #include <linux/console.h> 35 36 #include <asm/bootinfo.h> 37 #include <asm/dec/machtype.h> 38 #include <asm/dec/tc.h> 39 40 #include <video/fbcon.h> 41 #include <video/fbcon-cfb8.h> 42 43 #include "bt455.h" 44 #include "bt431.h" 45 46 /* Version information */ 47 #define DRIVER_VERSION "0.02" 48 #define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>" 49 #define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver" 50 51 /* Prototypes */ 52 static int aafb_set_var(struct fb_var_screeninfo *var, int con, 53 struct fb_info *info); 54 55 /* 56 * Bt455 RAM DAC register base offset (rel. to TC slot base address). 57 */ 58 #define PMAG_AA_BT455_OFFSET 0x100000 59 60 /* 61 * Bt431 cursor generator offset (rel. to TC slot base address). 62 */ 63 #define PMAG_AA_BT431_OFFSET 0x180000 64 65 /* 66 * Begin of PMAG-AA framebuffer memory relative to TC slot address, 67 * resolution is 1280x1024x1 (8 bits deep, but only LSB is used). 68 */ 69 #define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000 70 71 struct aafb_cursor { 72 struct timer_list timer; 73 int enable; 74 int on; 75 int vbl_cnt; 76 int blink_rate; 77 u16 x, y, width, height; 78 }; 79 80 #define CURSOR_TIMER_FREQ (HZ / 50) 81 #define CURSOR_BLINK_RATE (20) 82 #define CURSOR_DRAW_DELAY (2) 83 84 struct aafb_info { 85 struct fb_info info; 86 struct display disp; 87 struct aafb_cursor cursor; 88 struct bt455_regs *bt455; 89 struct bt431_regs *bt431; 90 unsigned long fb_start; 91 unsigned long fb_size; 92 unsigned long fb_line_length; 93 }; 94 95 /* 96 * Max 3 TURBOchannel slots -> max 3 PMAG-AA. 97 */ 98 static struct aafb_info my_fb_info[3]; 99 100 static struct aafb_par { 101 } current_par; 102 103 static int currcon = -1; 104 105 static void aafb_set_cursor(struct aafb_info *info, int on) 106 { 107 struct aafb_cursor *c = &info->cursor; 108 109 if (on) { 110 bt431_position_cursor(info->bt431, c->x, c->y); 111 bt431_enable_cursor(info->bt431); 112 } else 113 bt431_erase_cursor(info->bt431); 114 } 115 116 static void aafbcon_cursor(struct display *disp, int mode, int x, int y) 117 { 118 struct aafb_info *info = (struct aafb_info *)disp->fb_info; 119 struct aafb_cursor *c = &info->cursor; 120 121 x *= fontwidth(disp); 122 y *= fontheight(disp); 123 124 if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable) 125 return; 126 127 c->enable = 0; 128 if (c->on) 129 aafb_set_cursor(info, 0); 130 c->x = x - disp->var.xoffset; 131 c->y = y - disp->var.yoffset; 132 133 switch (mode) { 134 case CM_ERASE: 135 c->on = 0; 136 break; 137 case CM_DRAW: 138 case CM_MOVE: 139 if (c->on) 140 aafb_set_cursor(info, c->on); 141 else 142 c->vbl_cnt = CURSOR_DRAW_DELAY; 143 c->enable = 1; 144 break; 145 } 146 } 147 148 static int aafbcon_set_font(struct display *disp, int width, int height) 149 { 150 struct aafb_info *info = (struct aafb_info *)disp->fb_info; 151 struct aafb_cursor *c = &info->cursor; 152 u8 fgc = ~attr_bgcol_ec(disp, disp->conp, &info->info); 153 154 if (width > 64 || height > 64 || width < 0 || height < 0) 155 return -EINVAL; 156 157 c->height = height; 158 c->width = width; 159 160 bt431_set_font(info->bt431, fgc, width, height); 161 162 return 1; 163 } 164 165 static void aafb_cursor_timer_handler(unsigned long data) 166 { 167 struct aafb_info *info = (struct aafb_info *)data; 168 struct aafb_cursor *c = &info->cursor; 169 170 if (!c->enable) 171 goto out; 172 173 if (c->vbl_cnt && --c->vbl_cnt == 0) { 174 c->on ^= 1; 175 aafb_set_cursor(info, c->on); 176 c->vbl_cnt = c->blink_rate; 177 } 178 179 out: 180 c->timer.expires = jiffies + CURSOR_TIMER_FREQ; 181 add_timer(&c->timer); 182 } 183 184 static void __init aafb_cursor_init(struct aafb_info *info) 185 { 186 struct aafb_cursor *c = &info->cursor; 187 188 c->enable = 1; 189 c->on = 1; 190 c->x = c->y = 0; 191 c->width = c->height = 0; 192 c->vbl_cnt = CURSOR_DRAW_DELAY; 193 c->blink_rate = CURSOR_BLINK_RATE; 194 195 init_timer(&c->timer); 196 c->timer.data = (unsigned long)info; 197 c->timer.function = aafb_cursor_timer_handler; 198 mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ); 199 } 200 201 static void __exit aafb_cursor_exit(struct aafb_info *info) 202 { 203 struct aafb_cursor *c = &info->cursor; 204 205 del_timer_sync(&c->timer); 206 } 207 208 static struct display_switch aafb_switch8 = { 209 .setup = fbcon_cfb8_setup, 210 .bmove = fbcon_cfb8_bmove, 211 .clear = fbcon_cfb8_clear, 212 .putc = fbcon_cfb8_putc, 213 .putcs = fbcon_cfb8_putcs, 214 .revc = fbcon_cfb8_revc, 215 .cursor = aafbcon_cursor, 216 .set_font = aafbcon_set_font, 217 .clear_margins = fbcon_cfb8_clear_margins, 218 .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16) 219 }; 220 221 static void aafb_get_par(struct aafb_par *par) 222 { 223 *par = current_par; 224 } 225 226 static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con, 227 struct fb_info *info) 228 { 229 struct aafb_info *ip = (struct aafb_info *)info; 230 231 memset(fix, 0, sizeof(struct fb_fix_screeninfo)); 232 strcpy(fix->id, "PMAG-AA"); 233 fix->smem_start = ip->fb_start; 234 fix->smem_len = ip->fb_size; 235 fix->type = FB_TYPE_PACKED_PIXELS; 236 fix->ypanstep = 1; 237 fix->ywrapstep = 1; 238 fix->visual = FB_VISUAL_MONO10; 239 fix->line_length = 1280; 240 fix->accel = FB_ACCEL_NONE; 241 242 return 0; 243 } 244 245 static void aafb_set_disp(struct display *disp, int con, 246 struct aafb_info *info) 247 { 248 struct fb_fix_screeninfo fix; 249 250 disp->fb_info = &info->info; 251 aafb_set_var(&disp->var, con, &info->info); 252 if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor) 253 disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE); 254 disp->dispsw = &aafb_switch8; 255 disp->dispsw_data = 0; 256 257 aafb_get_fix(&fix, con, &info->info); 258 disp->screen_base = (u8 *) fix.smem_start; 259 disp->visual = fix.visual; 260 disp->type = fix.type; 261 disp->type_aux = fix.type_aux; 262 disp->ypanstep = fix.ypanstep; 263 disp->ywrapstep = fix.ywrapstep; 264 disp->line_length = fix.line_length; 265 disp->next_line = 2048; 266 disp->can_soft_blank = 1; 267 disp->inverse = 0; 268 disp->scrollmode = SCROLL_YREDRAW; 269 270 aafbcon_set_font(disp, fontwidth(disp), fontheight(disp)); 271 } 272 273 static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con, 274 struct fb_info *info) 275 { 276 static u16 color[2] = {0x0000, 0x000f}; 277 static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL}; 278 279 fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2); 280 return 0; 281 } 282 283 static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con, 284 struct fb_info *info) 285 { 286 u16 color[2] = {0x0000, 0x000f}; 287 288 if (cmap->start == 0 289 && cmap->len == 2 290 && memcmp(cmap->red, color, sizeof(color)) == 0 291 && memcmp(cmap->green, color, sizeof(color)) == 0 292 && memcmp(cmap->blue, color, sizeof(color)) == 0 293 && cmap->transp == NULL) 294 return 0; 295 else 296 return -EINVAL; 297 } 298 299 static int aafb_ioctl(struct fb_info *info, u32 cmd, unsigned long arg) 300 { 301 /* TODO: Not yet implemented */ 302 return -ENOIOCTLCMD; 303 } 304 305 static int aafb_switch(int con, struct fb_info *info) 306 { 307 struct aafb_info *ip = (struct aafb_info *)info; 308 struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon); 309 struct display *new = (con < 0) ? &ip->disp : (fb_display + con); 310 311 if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor) 312 old->conp->vc_sw->con_cursor(old->conp, CM_ERASE); 313 314 /* Set the current console. */ 315 currcon = con; 316 aafb_set_disp(new, con, ip); 317 318 return 0; 319 } 320 321 static void aafb_encode_var(struct fb_var_screeninfo *var, 322 struct aafb_par *par) 323 { 324 var->xres = 1280; 325 var->yres = 1024; 326 var->xres_virtual = 2048; 327 var->yres_virtual = 1024; 328 var->xoffset = 0; 329 var->yoffset = 0; 330 var->bits_per_pixel = 8; 331 var->grayscale = 1; 332 var->red.offset = 0; 333 var->red.length = 0; 334 var->red.msb_right = 0; 335 var->green.offset = 0; 336 var->green.length = 1; 337 var->green.msb_right = 0; 338 var->blue.offset = 0; 339 var->blue.length = 0; 340 var->blue.msb_right = 0; 341 var->transp.offset = 0; 342 var->transp.length = 0; 343 var->transp.msb_right = 0; 344 var->nonstd = 0; 345 var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW; 346 var->accel_flags = 0; 347 var->sync = FB_SYNC_ON_GREEN; 348 var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED; 349 } 350 351 static int aafb_get_var(struct fb_var_screeninfo *var, int con, 352 struct fb_info *info) 353 { 354 if (con < 0) { 355 struct aafb_par par; 356 357 memset(var, 0, sizeof(struct fb_var_screeninfo)); 358 aafb_get_par(&par); 359 aafb_encode_var(var, &par); 360 } else 361 *var = info->var; 362 363 return 0; 364 } 365 366 static int aafb_set_var(struct fb_var_screeninfo *var, int con, 367 struct fb_info *info) 368 { 369 struct aafb_par par; 370 371 aafb_get_par(&par); 372 aafb_encode_var(var, &par); 373 info->var = *var; 374 375 return 0; 376 } 377 378 static int aafb_update_var(int con, struct fb_info *info) 379 { 380 struct aafb_info *ip = (struct aafb_info *)info; 381 struct display *disp = (con < 0) ? &ip->disp : (fb_display + con); 382 383 if (con == currcon) 384 aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y); 385 386 return 0; 387 } 388 389 /* 0 unblanks, any other blanks. */ 390 391 static void aafb_blank(int blank, struct fb_info *info) 392 { 393 struct aafb_info *ip = (struct aafb_info *)info; 394 u8 val = blank ? 0x00 : 0x0f; 395 396 bt455_write_cmap_entry(ip->bt455, 1, val, val, val); 397 aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y); 398 } 399 400 static struct fb_ops aafb_ops = { 401 .owner = THIS_MODULE, 402 .fb_get_fix = aafb_get_fix, 403 .fb_get_var = aafb_get_var, 404 .fb_set_var = aafb_set_var, 405 .fb_get_cmap = aafb_get_cmap, 406 .fb_set_cmap = aafb_set_cmap, 407 .fb_ioctl = aafb_ioctl 408 }; 409 410 static int __init init_one(int slot) 411 { 412 unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot)); 413 struct aafb_info *ip = &my_fb_info[slot]; 414 415 memset(ip, 0, sizeof(struct aafb_info)); 416 417 /* 418 * Framebuffer display memory base address and friends. 419 */ 420 ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET); 421 ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET); 422 ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET; 423 ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length 424 seems to be physical */ 425 ip->fb_line_length = 2048; 426 427 /* 428 * Let there be consoles.. 429 */ 430 strcpy(ip->info.modename, "PMAG-AA"); 431 ip->info.node = -1; 432 ip->info.flags = FBINFO_FLAG_DEFAULT; 433 ip->info.fbops = &aafb_ops; 434 ip->info.disp = &ip->disp; 435 ip->info.changevar = NULL; 436 ip->info.switch_con = &aafb_switch; 437 ip->info.updatevar = &aafb_update_var; 438 ip->info.blank = &aafb_blank; 439 440 aafb_set_disp(&ip->disp, currcon, ip); 441 442 /* 443 * Configure the RAM DACs. 444 */ 445 bt455_erase_cursor(ip->bt455); 446 447 /* Init colormap. */ 448 bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00); 449 bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f); 450 451 /* Init hardware cursor. */ 452 bt431_init_cursor(ip->bt431); 453 aafb_cursor_init(ip); 454 455 /* Clear the screen. */ 456 memset ((void *)ip->fb_start, 0, ip->fb_size); 457 458 if (register_framebuffer(&ip->info) < 0) 459 return -EINVAL; 460 461 printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n", 462 GET_FB_IDX(ip->info.node), ip->info.modename, slot); 463 464 return 0; 465 } 466 467 static int __exit exit_one(int slot) 468 { 469 struct aafb_info *ip = &my_fb_info[slot]; 470 471 if (unregister_framebuffer(&ip->info) < 0) 472 return -EINVAL; 473 474 return 0; 475 } 476 477 /* 478 * Initialise the framebuffer. 479 */ 480 int __init pmagaafb_init(void) 481 { 482 int sid; 483 int found = 0; 484 485 while ((sid = search_tc_card("PMAG-AA")) >= 0) { 486 found = 1; 487 claim_tc_card(sid); 488 init_one(sid); 489 } 490 491 return found ? 0 : -ENXIO; 492 } 493 494 static void __exit pmagaafb_exit(void) 495 { 496 int sid; 497 498 while ((sid = search_tc_card("PMAG-AA")) >= 0) { 499 exit_one(sid); 500 release_tc_card(sid); 501 } 502 } 503 504 MODULE_AUTHOR(DRIVER_AUTHOR); 505 MODULE_DESCRIPTION(DRIVER_DESCRIPTION); 506 MODULE_LICENSE("GPL"); 507 #ifdef MODULE 508 module_init(pmagaafb_init); 509 module_exit(pmagaafb_exit); 510 #endif 511