Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/sched.h> |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/string.h> |
| 30 | #include <linux/timer.h> |
| 31 | #include <linux/mm.h> |
| 32 | #include <linux/tty.h> |
| 33 | #include <linux/slab.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/fb.h> |
| 37 | #include <linux/console.h> |
| 38 | |
| 39 | #include <asm/bootinfo.h> |
| 40 | #include <asm/dec/machtype.h> |
| 41 | #include <asm/dec/tc.h> |
| 42 | |
| 43 | #include <video/fbcon.h> |
| 44 | #include <video/fbcon-cfb8.h> |
| 45 | |
| 46 | #include "bt455.h" |
| 47 | #include "bt431.h" |
| 48 | |
| 49 | /* Version information */ |
| 50 | #define DRIVER_VERSION "0.02" |
| 51 | #define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>" |
| 52 | #define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver" |
| 53 | |
| 54 | /* Prototypes */ |
| 55 | static int aafb_set_var(struct fb_var_screeninfo *var, int con, |
| 56 | struct fb_info *info); |
| 57 | |
| 58 | /* |
| 59 | * Bt455 RAM DAC register base offset (rel. to TC slot base address). |
| 60 | */ |
| 61 | #define PMAG_AA_BT455_OFFSET 0x100000 |
| 62 | |
| 63 | /* |
| 64 | * Bt431 cursor generator offset (rel. to TC slot base address). |
| 65 | */ |
| 66 | #define PMAG_AA_BT431_OFFSET 0x180000 |
| 67 | |
| 68 | /* |
| 69 | * Begin of PMAG-AA framebuffer memory relative to TC slot address, |
| 70 | * resolution is 1280x1024x1 (8 bits deep, but only LSB is used). |
| 71 | */ |
| 72 | #define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000 |
| 73 | |
| 74 | struct aafb_cursor { |
| 75 | struct timer_list timer; |
| 76 | int enable; |
| 77 | int on; |
| 78 | int vbl_cnt; |
| 79 | int blink_rate; |
| 80 | u16 x, y, width, height; |
| 81 | }; |
| 82 | |
| 83 | #define CURSOR_TIMER_FREQ (HZ / 50) |
| 84 | #define CURSOR_BLINK_RATE (20) |
| 85 | #define CURSOR_DRAW_DELAY (2) |
| 86 | |
| 87 | struct aafb_info { |
| 88 | struct fb_info info; |
| 89 | struct display disp; |
| 90 | struct aafb_cursor cursor; |
| 91 | struct bt455_regs *bt455; |
| 92 | struct bt431_regs *bt431; |
| 93 | unsigned long fb_start; |
| 94 | unsigned long fb_size; |
| 95 | unsigned long fb_line_length; |
| 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * Max 3 TURBOchannel slots -> max 3 PMAG-AA. |
| 100 | */ |
| 101 | static struct aafb_info my_fb_info[3]; |
| 102 | |
| 103 | static struct aafb_par { |
| 104 | } current_par; |
| 105 | |
| 106 | static int currcon = -1; |
| 107 | |
| 108 | static void aafb_set_cursor(struct aafb_info *info, int on) |
| 109 | { |
| 110 | struct aafb_cursor *c = &info->cursor; |
| 111 | |
| 112 | if (on) { |
| 113 | bt431_position_cursor(info->bt431, c->x, c->y); |
| 114 | bt431_enable_cursor(info->bt431); |
| 115 | } else |
| 116 | bt431_erase_cursor(info->bt431); |
| 117 | } |
| 118 | |
| 119 | static void aafbcon_cursor(struct display *disp, int mode, int x, int y) |
| 120 | { |
| 121 | struct aafb_info *info = (struct aafb_info *)disp->fb_info; |
| 122 | struct aafb_cursor *c = &info->cursor; |
| 123 | |
| 124 | x *= fontwidth(disp); |
| 125 | y *= fontheight(disp); |
| 126 | |
| 127 | if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable) |
| 128 | return; |
| 129 | |
| 130 | c->enable = 0; |
| 131 | if (c->on) |
| 132 | aafb_set_cursor(info, 0); |
| 133 | c->x = x - disp->var.xoffset; |
| 134 | c->y = y - disp->var.yoffset; |
| 135 | |
| 136 | switch (mode) { |
| 137 | case CM_ERASE: |
| 138 | c->on = 0; |
| 139 | break; |
| 140 | case CM_DRAW: |
| 141 | case CM_MOVE: |
| 142 | if (c->on) |
| 143 | aafb_set_cursor(info, c->on); |
| 144 | else |
| 145 | c->vbl_cnt = CURSOR_DRAW_DELAY; |
| 146 | c->enable = 1; |
| 147 | break; |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | static int aafbcon_set_font(struct display *disp, int width, int height) |
| 152 | { |
| 153 | struct aafb_info *info = (struct aafb_info *)disp->fb_info; |
| 154 | struct aafb_cursor *c = &info->cursor; |
| 155 | u8 fgc = ~attr_bgcol_ec(disp, disp->conp); |
| 156 | |
| 157 | if (width > 64 || height > 64 || width < 0 || height < 0) |
| 158 | return -EINVAL; |
| 159 | |
| 160 | c->height = height; |
| 161 | c->width = width; |
| 162 | |
| 163 | bt431_set_font(info->bt431, fgc, width, height); |
| 164 | |
| 165 | return 1; |
| 166 | } |
| 167 | |
| 168 | static void aafb_cursor_timer_handler(unsigned long data) |
| 169 | { |
| 170 | struct aafb_info *info = (struct aafb_info *)data; |
| 171 | struct aafb_cursor *c = &info->cursor; |
| 172 | |
| 173 | if (!c->enable) |
| 174 | goto out; |
| 175 | |
| 176 | if (c->vbl_cnt && --c->vbl_cnt == 0) { |
| 177 | c->on ^= 1; |
| 178 | aafb_set_cursor(info, c->on); |
| 179 | c->vbl_cnt = c->blink_rate; |
| 180 | } |
| 181 | |
| 182 | out: |
| 183 | c->timer.expires = jiffies + CURSOR_TIMER_FREQ; |
| 184 | add_timer(&c->timer); |
| 185 | } |
| 186 | |
| 187 | static void __init aafb_cursor_init(struct aafb_info *info) |
| 188 | { |
| 189 | struct aafb_cursor *c = &info->cursor; |
| 190 | |
| 191 | c->enable = 1; |
| 192 | c->on = 1; |
| 193 | c->x = c->y = 0; |
| 194 | c->width = c->height = 0; |
| 195 | c->vbl_cnt = CURSOR_DRAW_DELAY; |
| 196 | c->blink_rate = CURSOR_BLINK_RATE; |
| 197 | |
| 198 | init_timer(&c->timer); |
| 199 | c->timer.data = (unsigned long)info; |
| 200 | c->timer.function = aafb_cursor_timer_handler; |
| 201 | mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ); |
| 202 | } |
| 203 | |
| 204 | static void __exit aafb_cursor_exit(struct aafb_info *info) |
| 205 | { |
| 206 | struct aafb_cursor *c = &info->cursor; |
| 207 | |
| 208 | del_timer_sync(&c->timer); |
| 209 | } |
| 210 | |
| 211 | static struct display_switch aafb_switch8 = { |
| 212 | .setup = fbcon_cfb8_setup, |
| 213 | .bmove = fbcon_cfb8_bmove, |
| 214 | .clear = fbcon_cfb8_clear, |
| 215 | .putc = fbcon_cfb8_putc, |
| 216 | .putcs = fbcon_cfb8_putcs, |
| 217 | .revc = fbcon_cfb8_revc, |
| 218 | .cursor = aafbcon_cursor, |
| 219 | .set_font = aafbcon_set_font, |
| 220 | .clear_margins = fbcon_cfb8_clear_margins, |
| 221 | .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16) |
| 222 | }; |
| 223 | |
| 224 | static void aafb_get_par(struct aafb_par *par) |
| 225 | { |
| 226 | *par = current_par; |
| 227 | } |
| 228 | |
| 229 | static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con, |
| 230 | struct fb_info *info) |
| 231 | { |
| 232 | struct aafb_info *ip = (struct aafb_info *)info; |
| 233 | |
| 234 | memset(fix, 0, sizeof(struct fb_fix_screeninfo)); |
| 235 | strcpy(fix->id, "PMAG-AA"); |
| 236 | fix->smem_start = ip->fb_start; |
| 237 | fix->smem_len = ip->fb_size; |
| 238 | fix->type = FB_TYPE_PACKED_PIXELS; |
| 239 | fix->ypanstep = 1; |
| 240 | fix->ywrapstep = 1; |
| 241 | fix->visual = FB_VISUAL_MONO10; |
| 242 | fix->line_length = 1280; |
| 243 | fix->accel = FB_ACCEL_NONE; |
| 244 | |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | static void aafb_set_disp(struct display *disp, int con, |
| 249 | struct aafb_info *info) |
| 250 | { |
| 251 | struct fb_fix_screeninfo fix; |
| 252 | |
| 253 | disp->fb_info = &info->info; |
| 254 | aafb_set_var(&disp->var, con, &info->info); |
| 255 | if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor) |
| 256 | disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE); |
| 257 | disp->dispsw = &aafb_switch8; |
| 258 | disp->dispsw_data = 0; |
| 259 | |
| 260 | aafb_get_fix(&fix, con, &info->info); |
| 261 | disp->screen_base = (u8 *) fix.smem_start; |
| 262 | disp->visual = fix.visual; |
| 263 | disp->type = fix.type; |
| 264 | disp->type_aux = fix.type_aux; |
| 265 | disp->ypanstep = fix.ypanstep; |
| 266 | disp->ywrapstep = fix.ywrapstep; |
| 267 | disp->line_length = fix.line_length; |
| 268 | disp->next_line = 2048; |
| 269 | disp->can_soft_blank = 1; |
| 270 | disp->inverse = 0; |
| 271 | disp->scrollmode = SCROLL_YREDRAW; |
| 272 | |
| 273 | aafbcon_set_font(disp, fontwidth(disp), fontheight(disp)); |
| 274 | } |
| 275 | |
| 276 | static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con, |
| 277 | struct fb_info *info) |
| 278 | { |
| 279 | static u16 color[2] = {0x0000, 0x000f}; |
| 280 | static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL}; |
| 281 | |
| 282 | fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2); |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con, |
| 287 | struct fb_info *info) |
| 288 | { |
| 289 | u16 color[2] = {0x0000, 0x000f}; |
| 290 | |
| 291 | if (cmap->start == 0 |
| 292 | && cmap->len == 2 |
| 293 | && memcmp(cmap->red, color, sizeof(color)) == 0 |
| 294 | && memcmp(cmap->green, color, sizeof(color)) == 0 |
| 295 | && memcmp(cmap->blue, color, sizeof(color)) == 0 |
| 296 | && cmap->transp == NULL) |
| 297 | return 0; |
| 298 | else |
| 299 | return -EINVAL; |
| 300 | } |
| 301 | |
| 302 | static int aafb_ioctl(struct inode *inode, struct file *file, u32 cmd, |
| 303 | unsigned long arg, int con, struct fb_info *info) |
| 304 | { |
| 305 | /* TODO: Not yet implemented */ |
| 306 | return -ENOIOCTLCMD; |
| 307 | } |
| 308 | |
| 309 | static int aafb_switch(int con, struct fb_info *info) |
| 310 | { |
| 311 | struct aafb_info *ip = (struct aafb_info *)info; |
| 312 | struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon); |
| 313 | struct display *new = (con < 0) ? &ip->disp : (fb_display + con); |
| 314 | |
| 315 | if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor) |
| 316 | old->conp->vc_sw->con_cursor(old->conp, CM_ERASE); |
| 317 | |
| 318 | /* Set the current console. */ |
| 319 | currcon = con; |
| 320 | aafb_set_disp(new, con, ip); |
| 321 | |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | static void aafb_encode_var(struct fb_var_screeninfo *var, |
| 326 | struct aafb_par *par) |
| 327 | { |
| 328 | var->xres = 1280; |
| 329 | var->yres = 1024; |
| 330 | var->xres_virtual = 2048; |
| 331 | var->yres_virtual = 1024; |
| 332 | var->xoffset = 0; |
| 333 | var->yoffset = 0; |
| 334 | var->bits_per_pixel = 8; |
| 335 | var->grayscale = 1; |
| 336 | var->red.offset = 0; |
| 337 | var->red.length = 0; |
| 338 | var->red.msb_right = 0; |
| 339 | var->green.offset = 0; |
| 340 | var->green.length = 1; |
| 341 | var->green.msb_right = 0; |
| 342 | var->blue.offset = 0; |
| 343 | var->blue.length = 0; |
| 344 | var->blue.msb_right = 0; |
| 345 | var->transp.offset = 0; |
| 346 | var->transp.length = 0; |
| 347 | var->transp.msb_right = 0; |
| 348 | var->nonstd = 0; |
| 349 | var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW; |
| 350 | var->accel_flags = 0; |
| 351 | var->sync = FB_SYNC_ON_GREEN; |
| 352 | var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED; |
| 353 | } |
| 354 | |
| 355 | static int aafb_get_var(struct fb_var_screeninfo *var, int con, |
| 356 | struct fb_info *info) |
| 357 | { |
| 358 | if (con < 0) { |
| 359 | struct aafb_par par; |
| 360 | |
| 361 | memset(var, 0, sizeof(struct fb_var_screeninfo)); |
| 362 | aafb_get_par(&par); |
| 363 | aafb_encode_var(var, &par); |
| 364 | } else |
| 365 | *var = info->var; |
| 366 | |
| 367 | return 0; |
| 368 | } |
| 369 | |
| 370 | static int aafb_set_var(struct fb_var_screeninfo *var, int con, |
| 371 | struct fb_info *info) |
| 372 | { |
| 373 | struct aafb_par par; |
| 374 | |
| 375 | aafb_get_par(&par); |
| 376 | aafb_encode_var(var, &par); |
| 377 | info->var = *var; |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static int aafb_update_var(int con, struct fb_info *info) |
| 383 | { |
| 384 | struct aafb_info *ip = (struct aafb_info *)info; |
| 385 | struct display *disp = (con < 0) ? &ip->disp : (fb_display + con); |
| 386 | |
| 387 | if (con == currcon) |
| 388 | aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y); |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | /* 0 unblanks, any other blanks. */ |
| 394 | |
| 395 | static void aafb_blank(int blank, struct fb_info *info) |
| 396 | { |
| 397 | struct aafb_info *ip = (struct aafb_info *)info; |
| 398 | u8 val = blank ? 0x00 : 0x0f; |
| 399 | |
| 400 | bt455_write_cmap_entry(ip->bt455, 1, val, val, val); |
| 401 | aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y); |
| 402 | } |
| 403 | |
| 404 | static struct fb_ops aafb_ops = { |
| 405 | .owner = THIS_MODULE, |
| 406 | .fb_get_fix = aafb_get_fix, |
| 407 | .fb_get_var = aafb_get_var, |
| 408 | .fb_set_var = aafb_set_var, |
| 409 | .fb_get_cmap = aafb_get_cmap, |
| 410 | .fb_set_cmap = aafb_set_cmap, |
| 411 | .fb_ioctl = aafb_ioctl |
| 412 | }; |
| 413 | |
| 414 | static int __init init_one(int slot) |
| 415 | { |
Ralf Baechle | 61838ff | 2005-09-03 15:56:09 -0700 | [diff] [blame] | 416 | unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | struct aafb_info *ip = &my_fb_info[slot]; |
| 418 | |
| 419 | memset(ip, 0, sizeof(struct aafb_info)); |
| 420 | |
| 421 | /* |
| 422 | * Framebuffer display memory base address and friends. |
| 423 | */ |
| 424 | ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET); |
| 425 | ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET); |
| 426 | ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET; |
| 427 | ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length |
| 428 | seems to be physical */ |
| 429 | ip->fb_line_length = 2048; |
| 430 | |
| 431 | /* |
| 432 | * Let there be consoles.. |
| 433 | */ |
| 434 | strcpy(ip->info.modename, "PMAG-AA"); |
| 435 | ip->info.node = -1; |
| 436 | ip->info.flags = FBINFO_FLAG_DEFAULT; |
| 437 | ip->info.fbops = &aafb_ops; |
| 438 | ip->info.disp = &ip->disp; |
| 439 | ip->info.changevar = NULL; |
| 440 | ip->info.switch_con = &aafb_switch; |
| 441 | ip->info.updatevar = &aafb_update_var; |
| 442 | ip->info.blank = &aafb_blank; |
| 443 | |
| 444 | aafb_set_disp(&ip->disp, currcon, ip); |
| 445 | |
| 446 | /* |
| 447 | * Configure the RAM DACs. |
| 448 | */ |
| 449 | bt455_erase_cursor(ip->bt455); |
| 450 | |
| 451 | /* Init colormap. */ |
| 452 | bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00); |
| 453 | bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f); |
| 454 | |
| 455 | /* Init hardware cursor. */ |
| 456 | bt431_init_cursor(ip->bt431); |
| 457 | aafb_cursor_init(ip); |
| 458 | |
| 459 | /* Clear the screen. */ |
| 460 | memset ((void *)ip->fb_start, 0, ip->fb_size); |
| 461 | |
| 462 | if (register_framebuffer(&ip->info) < 0) |
| 463 | return -EINVAL; |
| 464 | |
| 465 | printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n", |
| 466 | GET_FB_IDX(ip->info.node), ip->info.modename, slot); |
| 467 | |
| 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | static int __exit exit_one(int slot) |
| 472 | { |
| 473 | struct aafb_info *ip = &my_fb_info[slot]; |
| 474 | |
| 475 | if (unregister_framebuffer(&ip->info) < 0) |
| 476 | return -EINVAL; |
| 477 | |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | * Initialise the framebuffer. |
| 483 | */ |
| 484 | int __init pmagaafb_init(void) |
| 485 | { |
| 486 | int sid; |
| 487 | int found = 0; |
| 488 | |
| 489 | while ((sid = search_tc_card("PMAG-AA")) >= 0) { |
| 490 | found = 1; |
| 491 | claim_tc_card(sid); |
| 492 | init_one(sid); |
| 493 | } |
| 494 | |
| 495 | return found ? 0 : -ENXIO; |
| 496 | } |
| 497 | |
| 498 | static void __exit pmagaafb_exit(void) |
| 499 | { |
| 500 | int sid; |
| 501 | |
| 502 | while ((sid = search_tc_card("PMAG-AA")) >= 0) { |
| 503 | exit_one(sid); |
| 504 | release_tc_card(sid); |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 509 | MODULE_DESCRIPTION(DRIVER_DESCRIPTION); |
| 510 | MODULE_LICENSE("GPL"); |
| 511 | #ifdef MODULE |
| 512 | module_init(pmagaafb_init); |
| 513 | module_exit(pmagaafb_exit); |
| 514 | #endif |