1 /* 2 * Porting to u-boot: 3 * 4 * (C) Copyright 2010 5 * Stefano Babic, DENX Software Engineering, sbabic@denx.de 6 * 7 * MX51 Linux framebuffer: 8 * 9 * (C) Copyright 2004-2010 Freescale Semiconductor, Inc. 10 * 11 * See file CREDITS for list of people who contributed to this 12 * project. 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License as 16 * published by the Free Software Foundation; either version 2 of 17 * the License, or (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 27 * MA 02111-1307 USA 28 */ 29 30 #include <common.h> 31 #include <asm/errno.h> 32 #include <linux/string.h> 33 #include <linux/list.h> 34 #include <linux/fb.h> 35 #include <asm/io.h> 36 #include <malloc.h> 37 #include <video_fb.h> 38 #include "videomodes.h" 39 #include "ipu.h" 40 #include "mxcfb.h" 41 42 static int mxcfb_map_video_memory(struct fb_info *fbi); 43 static int mxcfb_unmap_video_memory(struct fb_info *fbi); 44 45 /* graphics setup */ 46 static GraphicDevice panel; 47 static struct fb_videomode *gmode; 48 static uint8_t gdisp; 49 static uint32_t gpixfmt; 50 51 void fb_videomode_to_var(struct fb_var_screeninfo *var, 52 const struct fb_videomode *mode) 53 { 54 var->xres = mode->xres; 55 var->yres = mode->yres; 56 var->xres_virtual = mode->xres; 57 var->yres_virtual = mode->yres; 58 var->xoffset = 0; 59 var->yoffset = 0; 60 var->pixclock = mode->pixclock; 61 var->left_margin = mode->left_margin; 62 var->right_margin = mode->right_margin; 63 var->upper_margin = mode->upper_margin; 64 var->lower_margin = mode->lower_margin; 65 var->hsync_len = mode->hsync_len; 66 var->vsync_len = mode->vsync_len; 67 var->sync = mode->sync; 68 var->vmode = mode->vmode & FB_VMODE_MASK; 69 } 70 71 /* 72 * Structure containing the MXC specific framebuffer information. 73 */ 74 struct mxcfb_info { 75 int blank; 76 ipu_channel_t ipu_ch; 77 int ipu_di; 78 u32 ipu_di_pix_fmt; 79 unsigned char overlay; 80 unsigned char alpha_chan_en; 81 dma_addr_t alpha_phy_addr0; 82 dma_addr_t alpha_phy_addr1; 83 void *alpha_virt_addr0; 84 void *alpha_virt_addr1; 85 uint32_t alpha_mem_len; 86 uint32_t cur_ipu_buf; 87 uint32_t cur_ipu_alpha_buf; 88 89 u32 pseudo_palette[16]; 90 }; 91 92 enum { 93 BOTH_ON, 94 SRC_ON, 95 TGT_ON, 96 BOTH_OFF 97 }; 98 99 static unsigned long default_bpp = 16; 100 static unsigned char g_dp_in_use; 101 static struct fb_info *mxcfb_info[3]; 102 static int ext_clk_used; 103 104 static uint32_t bpp_to_pixfmt(struct fb_info *fbi) 105 { 106 uint32_t pixfmt = 0; 107 108 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel); 109 110 if (fbi->var.nonstd) 111 return fbi->var.nonstd; 112 113 switch (fbi->var.bits_per_pixel) { 114 case 24: 115 pixfmt = IPU_PIX_FMT_BGR24; 116 break; 117 case 32: 118 pixfmt = IPU_PIX_FMT_BGR32; 119 break; 120 case 16: 121 pixfmt = IPU_PIX_FMT_RGB565; 122 break; 123 } 124 return pixfmt; 125 } 126 127 /* 128 * Set fixed framebuffer parameters based on variable settings. 129 * 130 * @param info framebuffer information pointer 131 */ 132 static int mxcfb_set_fix(struct fb_info *info) 133 { 134 struct fb_fix_screeninfo *fix = &info->fix; 135 struct fb_var_screeninfo *var = &info->var; 136 137 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; 138 139 fix->type = FB_TYPE_PACKED_PIXELS; 140 fix->accel = FB_ACCEL_NONE; 141 fix->visual = FB_VISUAL_TRUECOLOR; 142 fix->xpanstep = 1; 143 fix->ypanstep = 1; 144 145 return 0; 146 } 147 148 static int setup_disp_channel1(struct fb_info *fbi) 149 { 150 ipu_channel_params_t params; 151 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 152 153 memset(¶ms, 0, sizeof(params)); 154 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di; 155 156 debug("%s called\n", __func__); 157 /* 158 * Assuming interlaced means yuv output, below setting also 159 * valid for mem_dc_sync. FG should have the same vmode as BG. 160 */ 161 if (fbi->var.vmode & FB_VMODE_INTERLACED) { 162 params.mem_dp_bg_sync.interlaced = 1; 163 params.mem_dp_bg_sync.out_pixel_fmt = 164 IPU_PIX_FMT_YUV444; 165 } else { 166 if (mxc_fbi->ipu_di_pix_fmt) { 167 params.mem_dp_bg_sync.out_pixel_fmt = 168 mxc_fbi->ipu_di_pix_fmt; 169 } else { 170 params.mem_dp_bg_sync.out_pixel_fmt = 171 IPU_PIX_FMT_RGB666; 172 } 173 } 174 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi); 175 if (mxc_fbi->alpha_chan_en) 176 params.mem_dp_bg_sync.alpha_chan_en = 1; 177 178 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms); 179 180 return 0; 181 } 182 183 static int setup_disp_channel2(struct fb_info *fbi) 184 { 185 int retval = 0; 186 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 187 188 mxc_fbi->cur_ipu_buf = 1; 189 if (mxc_fbi->alpha_chan_en) 190 mxc_fbi->cur_ipu_alpha_buf = 1; 191 192 fbi->var.xoffset = fbi->var.yoffset = 0; 193 194 debug("%s: %x %d %d %d %lx %lx\n", 195 __func__, 196 mxc_fbi->ipu_ch, 197 fbi->var.xres, 198 fbi->var.yres, 199 fbi->fix.line_length, 200 fbi->fix.smem_start, 201 fbi->fix.smem_start + 202 (fbi->fix.line_length * fbi->var.yres)); 203 204 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER, 205 bpp_to_pixfmt(fbi), 206 fbi->var.xres, fbi->var.yres, 207 fbi->fix.line_length, 208 fbi->fix.smem_start + 209 (fbi->fix.line_length * fbi->var.yres), 210 fbi->fix.smem_start, 211 0, 0); 212 if (retval) 213 printf("ipu_init_channel_buffer error %d\n", retval); 214 215 return retval; 216 } 217 218 /* 219 * Set framebuffer parameters and change the operating mode. 220 * 221 * @param info framebuffer information pointer 222 */ 223 static int mxcfb_set_par(struct fb_info *fbi) 224 { 225 int retval = 0; 226 u32 mem_len; 227 ipu_di_signal_cfg_t sig_cfg; 228 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 229 uint32_t out_pixel_fmt; 230 231 ipu_disable_channel(mxc_fbi->ipu_ch); 232 ipu_uninit_channel(mxc_fbi->ipu_ch); 233 mxcfb_set_fix(fbi); 234 235 mem_len = fbi->var.yres_virtual * fbi->fix.line_length; 236 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) { 237 if (fbi->fix.smem_start) 238 mxcfb_unmap_video_memory(fbi); 239 240 if (mxcfb_map_video_memory(fbi) < 0) 241 return -ENOMEM; 242 } 243 244 setup_disp_channel1(fbi); 245 246 memset(&sig_cfg, 0, sizeof(sig_cfg)); 247 if (fbi->var.vmode & FB_VMODE_INTERLACED) { 248 sig_cfg.interlaced = 1; 249 out_pixel_fmt = IPU_PIX_FMT_YUV444; 250 } else { 251 if (mxc_fbi->ipu_di_pix_fmt) 252 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt; 253 else 254 out_pixel_fmt = IPU_PIX_FMT_RGB666; 255 } 256 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */ 257 sig_cfg.odd_field_first = 1; 258 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used) 259 sig_cfg.ext_clk = 1; 260 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT) 261 sig_cfg.Hsync_pol = 1; 262 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT) 263 sig_cfg.Vsync_pol = 1; 264 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL)) 265 sig_cfg.clk_pol = 1; 266 if (fbi->var.sync & FB_SYNC_DATA_INVERT) 267 sig_cfg.data_pol = 1; 268 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT)) 269 sig_cfg.enable_pol = 1; 270 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN) 271 sig_cfg.clkidle_en = 1; 272 273 debug("pixclock = %ul Hz\n", 274 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL)); 275 276 if (ipu_init_sync_panel(mxc_fbi->ipu_di, 277 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL, 278 fbi->var.xres, fbi->var.yres, 279 out_pixel_fmt, 280 fbi->var.left_margin, 281 fbi->var.hsync_len, 282 fbi->var.right_margin, 283 fbi->var.upper_margin, 284 fbi->var.vsync_len, 285 fbi->var.lower_margin, 286 0, sig_cfg) != 0) { 287 puts("mxcfb: Error initializing panel.\n"); 288 return -EINVAL; 289 } 290 291 retval = setup_disp_channel2(fbi); 292 if (retval) 293 return retval; 294 295 if (mxc_fbi->blank == FB_BLANK_UNBLANK) 296 ipu_enable_channel(mxc_fbi->ipu_ch); 297 298 return retval; 299 } 300 301 /* 302 * Check framebuffer variable parameters and adjust to valid values. 303 * 304 * @param var framebuffer variable parameters 305 * 306 * @param info framebuffer information pointer 307 */ 308 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 309 { 310 u32 vtotal; 311 u32 htotal; 312 313 if (var->xres_virtual < var->xres) 314 var->xres_virtual = var->xres; 315 if (var->yres_virtual < var->yres) 316 var->yres_virtual = var->yres; 317 318 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) && 319 (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8)) 320 var->bits_per_pixel = default_bpp; 321 322 switch (var->bits_per_pixel) { 323 case 8: 324 var->red.length = 3; 325 var->red.offset = 5; 326 var->red.msb_right = 0; 327 328 var->green.length = 3; 329 var->green.offset = 2; 330 var->green.msb_right = 0; 331 332 var->blue.length = 2; 333 var->blue.offset = 0; 334 var->blue.msb_right = 0; 335 336 var->transp.length = 0; 337 var->transp.offset = 0; 338 var->transp.msb_right = 0; 339 break; 340 case 16: 341 var->red.length = 5; 342 var->red.offset = 11; 343 var->red.msb_right = 0; 344 345 var->green.length = 6; 346 var->green.offset = 5; 347 var->green.msb_right = 0; 348 349 var->blue.length = 5; 350 var->blue.offset = 0; 351 var->blue.msb_right = 0; 352 353 var->transp.length = 0; 354 var->transp.offset = 0; 355 var->transp.msb_right = 0; 356 break; 357 case 24: 358 var->red.length = 8; 359 var->red.offset = 16; 360 var->red.msb_right = 0; 361 362 var->green.length = 8; 363 var->green.offset = 8; 364 var->green.msb_right = 0; 365 366 var->blue.length = 8; 367 var->blue.offset = 0; 368 var->blue.msb_right = 0; 369 370 var->transp.length = 0; 371 var->transp.offset = 0; 372 var->transp.msb_right = 0; 373 break; 374 case 32: 375 var->red.length = 8; 376 var->red.offset = 16; 377 var->red.msb_right = 0; 378 379 var->green.length = 8; 380 var->green.offset = 8; 381 var->green.msb_right = 0; 382 383 var->blue.length = 8; 384 var->blue.offset = 0; 385 var->blue.msb_right = 0; 386 387 var->transp.length = 8; 388 var->transp.offset = 24; 389 var->transp.msb_right = 0; 390 break; 391 } 392 393 if (var->pixclock < 1000) { 394 htotal = var->xres + var->right_margin + var->hsync_len + 395 var->left_margin; 396 vtotal = var->yres + var->lower_margin + var->vsync_len + 397 var->upper_margin; 398 var->pixclock = (vtotal * htotal * 6UL) / 100UL; 399 var->pixclock = KHZ2PICOS(var->pixclock); 400 printf("pixclock set for 60Hz refresh = %u ps\n", 401 var->pixclock); 402 } 403 404 var->height = -1; 405 var->width = -1; 406 var->grayscale = 0; 407 408 return 0; 409 } 410 411 static int mxcfb_map_video_memory(struct fb_info *fbi) 412 { 413 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) { 414 fbi->fix.smem_len = fbi->var.yres_virtual * 415 fbi->fix.line_length; 416 } 417 418 fbi->screen_base = (char *)malloc(fbi->fix.smem_len); 419 fbi->fix.smem_start = (unsigned long)fbi->screen_base; 420 if (fbi->screen_base == 0) { 421 puts("Unable to allocate framebuffer memory\n"); 422 fbi->fix.smem_len = 0; 423 fbi->fix.smem_start = 0; 424 return -EBUSY; 425 } 426 427 debug("allocated fb @ paddr=0x%08X, size=%d.\n", 428 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len); 429 430 fbi->screen_size = fbi->fix.smem_len; 431 432 /* Clear the screen */ 433 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len); 434 435 return 0; 436 } 437 438 static int mxcfb_unmap_video_memory(struct fb_info *fbi) 439 { 440 fbi->screen_base = 0; 441 fbi->fix.smem_start = 0; 442 fbi->fix.smem_len = 0; 443 return 0; 444 } 445 446 /* 447 * Initializes the framebuffer information pointer. After allocating 448 * sufficient memory for the framebuffer structure, the fields are 449 * filled with custom information passed in from the configurable 450 * structures. This includes information such as bits per pixel, 451 * color maps, screen width/height and RGBA offsets. 452 * 453 * @return Framebuffer structure initialized with our information 454 */ 455 static struct fb_info *mxcfb_init_fbinfo(void) 456 { 457 #define BYTES_PER_LONG 4 458 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG)) 459 struct fb_info *fbi; 460 struct mxcfb_info *mxcfbi; 461 char *p; 462 int size = sizeof(struct mxcfb_info) + PADDING + 463 sizeof(struct fb_info); 464 465 debug("%s: %d %d %d %d\n", 466 __func__, 467 PADDING, 468 size, 469 sizeof(struct mxcfb_info), 470 sizeof(struct fb_info)); 471 /* 472 * Allocate sufficient memory for the fb structure 473 */ 474 475 p = malloc(size); 476 if (!p) 477 return NULL; 478 479 memset(p, 0, size); 480 481 fbi = (struct fb_info *)p; 482 fbi->par = p + sizeof(struct fb_info) + PADDING; 483 484 mxcfbi = (struct mxcfb_info *)fbi->par; 485 debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n", 486 (unsigned int)fbi, (unsigned int)mxcfbi); 487 488 fbi->var.activate = FB_ACTIVATE_NOW; 489 490 fbi->flags = FBINFO_FLAG_DEFAULT; 491 fbi->pseudo_palette = mxcfbi->pseudo_palette; 492 493 return fbi; 494 } 495 496 /* 497 * Probe routine for the framebuffer driver. It is called during the 498 * driver binding process. The following functions are performed in 499 * this routine: Framebuffer initialization, Memory allocation and 500 * mapping, Framebuffer registration, IPU initialization. 501 * 502 * @return Appropriate error code to the kernel common code 503 */ 504 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp, 505 struct fb_videomode *mode) 506 { 507 struct fb_info *fbi; 508 struct mxcfb_info *mxcfbi; 509 int ret = 0; 510 511 /* 512 * Initialize FB structures 513 */ 514 fbi = mxcfb_init_fbinfo(); 515 if (!fbi) { 516 ret = -ENOMEM; 517 goto err0; 518 } 519 mxcfbi = (struct mxcfb_info *)fbi->par; 520 521 if (!g_dp_in_use) { 522 mxcfbi->ipu_ch = MEM_BG_SYNC; 523 mxcfbi->blank = FB_BLANK_UNBLANK; 524 } else { 525 mxcfbi->ipu_ch = MEM_DC_SYNC; 526 mxcfbi->blank = FB_BLANK_POWERDOWN; 527 } 528 529 mxcfbi->ipu_di = disp; 530 531 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80); 532 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0); 533 strcpy(fbi->fix.id, "DISP3 BG"); 534 535 g_dp_in_use = 1; 536 537 mxcfb_info[mxcfbi->ipu_di] = fbi; 538 539 /* Need dummy values until real panel is configured */ 540 541 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt; 542 fb_videomode_to_var(&fbi->var, mode); 543 fbi->var.bits_per_pixel = 16; 544 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8); 545 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length; 546 547 mxcfb_check_var(&fbi->var, fbi); 548 549 /* Default Y virtual size is 2x panel size */ 550 fbi->var.yres_virtual = fbi->var.yres * 2; 551 552 mxcfb_set_fix(fbi); 553 554 /* alocate fb first */ 555 if (mxcfb_map_video_memory(fbi) < 0) 556 return -ENOMEM; 557 558 mxcfb_set_par(fbi); 559 560 panel.winSizeX = mode->xres; 561 panel.winSizeY = mode->yres; 562 panel.plnSizeX = mode->xres; 563 panel.plnSizeY = mode->yres; 564 565 panel.frameAdrs = (u32)fbi->screen_base; 566 panel.memSize = fbi->screen_size; 567 568 panel.gdfBytesPP = 2; 569 panel.gdfIndex = GDF_16BIT_565RGB; 570 571 ipu_dump_registers(); 572 573 return 0; 574 575 err0: 576 return ret; 577 } 578 579 void *video_hw_init(void) 580 { 581 int ret; 582 583 ret = ipu_probe(); 584 if (ret) 585 puts("Error initializing IPU\n"); 586 587 ret = mxcfb_probe(gpixfmt, gdisp, gmode); 588 debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs); 589 590 return (void *)&panel; 591 } 592 593 void video_set_lut(unsigned int index, /* color number */ 594 unsigned char r, /* red */ 595 unsigned char g, /* green */ 596 unsigned char b /* blue */ 597 ) 598 { 599 return; 600 } 601 602 int mx51_fb_init(struct fb_videomode *mode, uint8_t disp, uint32_t pixfmt) 603 { 604 gmode = mode; 605 gdisp = disp; 606 gpixfmt = pixfmt; 607 608 return 0; 609 } 610