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 #include "ipu_regs.h" 42 43 static int mxcfb_map_video_memory(struct fb_info *fbi); 44 static int mxcfb_unmap_video_memory(struct fb_info *fbi); 45 46 /* graphics setup */ 47 static GraphicDevice panel; 48 static struct fb_videomode const *gmode; 49 static uint8_t gdisp; 50 static uint32_t gpixfmt; 51 52 void fb_videomode_to_var(struct fb_var_screeninfo *var, 53 const struct fb_videomode *mode) 54 { 55 var->xres = mode->xres; 56 var->yres = mode->yres; 57 var->xres_virtual = mode->xres; 58 var->yres_virtual = mode->yres; 59 var->xoffset = 0; 60 var->yoffset = 0; 61 var->pixclock = mode->pixclock; 62 var->left_margin = mode->left_margin; 63 var->right_margin = mode->right_margin; 64 var->upper_margin = mode->upper_margin; 65 var->lower_margin = mode->lower_margin; 66 var->hsync_len = mode->hsync_len; 67 var->vsync_len = mode->vsync_len; 68 var->sync = mode->sync; 69 var->vmode = mode->vmode & FB_VMODE_MASK; 70 } 71 72 /* 73 * Structure containing the MXC specific framebuffer information. 74 */ 75 struct mxcfb_info { 76 int blank; 77 ipu_channel_t ipu_ch; 78 int ipu_di; 79 u32 ipu_di_pix_fmt; 80 unsigned char overlay; 81 unsigned char alpha_chan_en; 82 dma_addr_t alpha_phy_addr0; 83 dma_addr_t alpha_phy_addr1; 84 void *alpha_virt_addr0; 85 void *alpha_virt_addr1; 86 uint32_t alpha_mem_len; 87 uint32_t cur_ipu_buf; 88 uint32_t cur_ipu_alpha_buf; 89 90 u32 pseudo_palette[16]; 91 }; 92 93 enum { 94 BOTH_ON, 95 SRC_ON, 96 TGT_ON, 97 BOTH_OFF 98 }; 99 100 static unsigned long default_bpp = 16; 101 static unsigned char g_dp_in_use; 102 static struct fb_info *mxcfb_info[3]; 103 static int ext_clk_used; 104 105 static uint32_t bpp_to_pixfmt(struct fb_info *fbi) 106 { 107 uint32_t pixfmt = 0; 108 109 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel); 110 111 if (fbi->var.nonstd) 112 return fbi->var.nonstd; 113 114 switch (fbi->var.bits_per_pixel) { 115 case 24: 116 pixfmt = IPU_PIX_FMT_BGR24; 117 break; 118 case 32: 119 pixfmt = IPU_PIX_FMT_BGR32; 120 break; 121 case 16: 122 pixfmt = IPU_PIX_FMT_RGB565; 123 break; 124 } 125 return pixfmt; 126 } 127 128 /* 129 * Set fixed framebuffer parameters based on variable settings. 130 * 131 * @param info framebuffer information pointer 132 */ 133 static int mxcfb_set_fix(struct fb_info *info) 134 { 135 struct fb_fix_screeninfo *fix = &info->fix; 136 struct fb_var_screeninfo *var = &info->var; 137 138 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; 139 140 fix->type = FB_TYPE_PACKED_PIXELS; 141 fix->accel = FB_ACCEL_NONE; 142 fix->visual = FB_VISUAL_TRUECOLOR; 143 fix->xpanstep = 1; 144 fix->ypanstep = 1; 145 146 return 0; 147 } 148 149 static int setup_disp_channel1(struct fb_info *fbi) 150 { 151 ipu_channel_params_t params; 152 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 153 154 memset(¶ms, 0, sizeof(params)); 155 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di; 156 157 debug("%s called\n", __func__); 158 /* 159 * Assuming interlaced means yuv output, below setting also 160 * valid for mem_dc_sync. FG should have the same vmode as BG. 161 */ 162 if (fbi->var.vmode & FB_VMODE_INTERLACED) { 163 params.mem_dp_bg_sync.interlaced = 1; 164 params.mem_dp_bg_sync.out_pixel_fmt = 165 IPU_PIX_FMT_YUV444; 166 } else { 167 if (mxc_fbi->ipu_di_pix_fmt) { 168 params.mem_dp_bg_sync.out_pixel_fmt = 169 mxc_fbi->ipu_di_pix_fmt; 170 } else { 171 params.mem_dp_bg_sync.out_pixel_fmt = 172 IPU_PIX_FMT_RGB666; 173 } 174 } 175 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi); 176 if (mxc_fbi->alpha_chan_en) 177 params.mem_dp_bg_sync.alpha_chan_en = 1; 178 179 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms); 180 181 return 0; 182 } 183 184 static int setup_disp_channel2(struct fb_info *fbi) 185 { 186 int retval = 0; 187 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 188 189 mxc_fbi->cur_ipu_buf = 1; 190 if (mxc_fbi->alpha_chan_en) 191 mxc_fbi->cur_ipu_alpha_buf = 1; 192 193 fbi->var.xoffset = fbi->var.yoffset = 0; 194 195 debug("%s: %x %d %d %d %lx %lx\n", 196 __func__, 197 mxc_fbi->ipu_ch, 198 fbi->var.xres, 199 fbi->var.yres, 200 fbi->fix.line_length, 201 fbi->fix.smem_start, 202 fbi->fix.smem_start + 203 (fbi->fix.line_length * fbi->var.yres)); 204 205 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER, 206 bpp_to_pixfmt(fbi), 207 fbi->var.xres, fbi->var.yres, 208 fbi->fix.line_length, 209 fbi->fix.smem_start + 210 (fbi->fix.line_length * fbi->var.yres), 211 fbi->fix.smem_start, 212 0, 0); 213 if (retval) 214 printf("ipu_init_channel_buffer error %d\n", retval); 215 216 return retval; 217 } 218 219 /* 220 * Set framebuffer parameters and change the operating mode. 221 * 222 * @param info framebuffer information pointer 223 */ 224 static int mxcfb_set_par(struct fb_info *fbi) 225 { 226 int retval = 0; 227 u32 mem_len; 228 ipu_di_signal_cfg_t sig_cfg; 229 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 230 uint32_t out_pixel_fmt; 231 232 ipu_disable_channel(mxc_fbi->ipu_ch); 233 ipu_uninit_channel(mxc_fbi->ipu_ch); 234 mxcfb_set_fix(fbi); 235 236 mem_len = fbi->var.yres_virtual * fbi->fix.line_length; 237 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) { 238 if (fbi->fix.smem_start) 239 mxcfb_unmap_video_memory(fbi); 240 241 if (mxcfb_map_video_memory(fbi) < 0) 242 return -ENOMEM; 243 } 244 245 setup_disp_channel1(fbi); 246 247 memset(&sig_cfg, 0, sizeof(sig_cfg)); 248 if (fbi->var.vmode & FB_VMODE_INTERLACED) { 249 sig_cfg.interlaced = 1; 250 out_pixel_fmt = IPU_PIX_FMT_YUV444; 251 } else { 252 if (mxc_fbi->ipu_di_pix_fmt) 253 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt; 254 else 255 out_pixel_fmt = IPU_PIX_FMT_RGB666; 256 } 257 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */ 258 sig_cfg.odd_field_first = 1; 259 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used) 260 sig_cfg.ext_clk = 1; 261 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT) 262 sig_cfg.Hsync_pol = 1; 263 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT) 264 sig_cfg.Vsync_pol = 1; 265 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL)) 266 sig_cfg.clk_pol = 1; 267 if (fbi->var.sync & FB_SYNC_DATA_INVERT) 268 sig_cfg.data_pol = 1; 269 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT)) 270 sig_cfg.enable_pol = 1; 271 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN) 272 sig_cfg.clkidle_en = 1; 273 274 debug("pixclock = %ul Hz\n", 275 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL)); 276 277 if (ipu_init_sync_panel(mxc_fbi->ipu_di, 278 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL, 279 fbi->var.xres, fbi->var.yres, 280 out_pixel_fmt, 281 fbi->var.left_margin, 282 fbi->var.hsync_len, 283 fbi->var.right_margin, 284 fbi->var.upper_margin, 285 fbi->var.vsync_len, 286 fbi->var.lower_margin, 287 0, sig_cfg) != 0) { 288 puts("mxcfb: Error initializing panel.\n"); 289 return -EINVAL; 290 } 291 292 retval = setup_disp_channel2(fbi); 293 if (retval) 294 return retval; 295 296 if (mxc_fbi->blank == FB_BLANK_UNBLANK) 297 ipu_enable_channel(mxc_fbi->ipu_ch); 298 299 return retval; 300 } 301 302 /* 303 * Check framebuffer variable parameters and adjust to valid values. 304 * 305 * @param var framebuffer variable parameters 306 * 307 * @param info framebuffer information pointer 308 */ 309 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 310 { 311 u32 vtotal; 312 u32 htotal; 313 314 if (var->xres_virtual < var->xres) 315 var->xres_virtual = var->xres; 316 if (var->yres_virtual < var->yres) 317 var->yres_virtual = var->yres; 318 319 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) && 320 (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8)) 321 var->bits_per_pixel = default_bpp; 322 323 switch (var->bits_per_pixel) { 324 case 8: 325 var->red.length = 3; 326 var->red.offset = 5; 327 var->red.msb_right = 0; 328 329 var->green.length = 3; 330 var->green.offset = 2; 331 var->green.msb_right = 0; 332 333 var->blue.length = 2; 334 var->blue.offset = 0; 335 var->blue.msb_right = 0; 336 337 var->transp.length = 0; 338 var->transp.offset = 0; 339 var->transp.msb_right = 0; 340 break; 341 case 16: 342 var->red.length = 5; 343 var->red.offset = 11; 344 var->red.msb_right = 0; 345 346 var->green.length = 6; 347 var->green.offset = 5; 348 var->green.msb_right = 0; 349 350 var->blue.length = 5; 351 var->blue.offset = 0; 352 var->blue.msb_right = 0; 353 354 var->transp.length = 0; 355 var->transp.offset = 0; 356 var->transp.msb_right = 0; 357 break; 358 case 24: 359 var->red.length = 8; 360 var->red.offset = 16; 361 var->red.msb_right = 0; 362 363 var->green.length = 8; 364 var->green.offset = 8; 365 var->green.msb_right = 0; 366 367 var->blue.length = 8; 368 var->blue.offset = 0; 369 var->blue.msb_right = 0; 370 371 var->transp.length = 0; 372 var->transp.offset = 0; 373 var->transp.msb_right = 0; 374 break; 375 case 32: 376 var->red.length = 8; 377 var->red.offset = 16; 378 var->red.msb_right = 0; 379 380 var->green.length = 8; 381 var->green.offset = 8; 382 var->green.msb_right = 0; 383 384 var->blue.length = 8; 385 var->blue.offset = 0; 386 var->blue.msb_right = 0; 387 388 var->transp.length = 8; 389 var->transp.offset = 24; 390 var->transp.msb_right = 0; 391 break; 392 } 393 394 if (var->pixclock < 1000) { 395 htotal = var->xres + var->right_margin + var->hsync_len + 396 var->left_margin; 397 vtotal = var->yres + var->lower_margin + var->vsync_len + 398 var->upper_margin; 399 var->pixclock = (vtotal * htotal * 6UL) / 100UL; 400 var->pixclock = KHZ2PICOS(var->pixclock); 401 printf("pixclock set for 60Hz refresh = %u ps\n", 402 var->pixclock); 403 } 404 405 var->height = -1; 406 var->width = -1; 407 var->grayscale = 0; 408 409 return 0; 410 } 411 412 static int mxcfb_map_video_memory(struct fb_info *fbi) 413 { 414 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) { 415 fbi->fix.smem_len = fbi->var.yres_virtual * 416 fbi->fix.line_length; 417 } 418 419 fbi->screen_base = (char *)malloc(fbi->fix.smem_len); 420 fbi->fix.smem_start = (unsigned long)fbi->screen_base; 421 if (fbi->screen_base == 0) { 422 puts("Unable to allocate framebuffer memory\n"); 423 fbi->fix.smem_len = 0; 424 fbi->fix.smem_start = 0; 425 return -EBUSY; 426 } 427 428 debug("allocated fb @ paddr=0x%08X, size=%d.\n", 429 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len); 430 431 fbi->screen_size = fbi->fix.smem_len; 432 433 /* Clear the screen */ 434 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len); 435 436 return 0; 437 } 438 439 static int mxcfb_unmap_video_memory(struct fb_info *fbi) 440 { 441 fbi->screen_base = 0; 442 fbi->fix.smem_start = 0; 443 fbi->fix.smem_len = 0; 444 return 0; 445 } 446 447 /* 448 * Initializes the framebuffer information pointer. After allocating 449 * sufficient memory for the framebuffer structure, the fields are 450 * filled with custom information passed in from the configurable 451 * structures. This includes information such as bits per pixel, 452 * color maps, screen width/height and RGBA offsets. 453 * 454 * @return Framebuffer structure initialized with our information 455 */ 456 static struct fb_info *mxcfb_init_fbinfo(void) 457 { 458 #define BYTES_PER_LONG 4 459 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG)) 460 struct fb_info *fbi; 461 struct mxcfb_info *mxcfbi; 462 char *p; 463 int size = sizeof(struct mxcfb_info) + PADDING + 464 sizeof(struct fb_info); 465 466 debug("%s: %d %d %d %d\n", 467 __func__, 468 PADDING, 469 size, 470 sizeof(struct mxcfb_info), 471 sizeof(struct fb_info)); 472 /* 473 * Allocate sufficient memory for the fb structure 474 */ 475 476 p = malloc(size); 477 if (!p) 478 return NULL; 479 480 memset(p, 0, size); 481 482 fbi = (struct fb_info *)p; 483 fbi->par = p + sizeof(struct fb_info) + PADDING; 484 485 mxcfbi = (struct mxcfb_info *)fbi->par; 486 debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n", 487 (unsigned int)fbi, (unsigned int)mxcfbi); 488 489 fbi->var.activate = FB_ACTIVATE_NOW; 490 491 fbi->flags = FBINFO_FLAG_DEFAULT; 492 fbi->pseudo_palette = mxcfbi->pseudo_palette; 493 494 return fbi; 495 } 496 497 /* 498 * Probe routine for the framebuffer driver. It is called during the 499 * driver binding process. The following functions are performed in 500 * this routine: Framebuffer initialization, Memory allocation and 501 * mapping, Framebuffer registration, IPU initialization. 502 * 503 * @return Appropriate error code to the kernel common code 504 */ 505 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp, 506 struct fb_videomode const *mode) 507 { 508 struct fb_info *fbi; 509 struct mxcfb_info *mxcfbi; 510 int ret = 0; 511 512 /* 513 * Initialize FB structures 514 */ 515 fbi = mxcfb_init_fbinfo(); 516 if (!fbi) { 517 ret = -ENOMEM; 518 goto err0; 519 } 520 mxcfbi = (struct mxcfb_info *)fbi->par; 521 522 if (!g_dp_in_use) { 523 mxcfbi->ipu_ch = MEM_BG_SYNC; 524 mxcfbi->blank = FB_BLANK_UNBLANK; 525 } else { 526 mxcfbi->ipu_ch = MEM_DC_SYNC; 527 mxcfbi->blank = FB_BLANK_POWERDOWN; 528 } 529 530 mxcfbi->ipu_di = disp; 531 532 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80); 533 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0); 534 strcpy(fbi->fix.id, "DISP3 BG"); 535 536 g_dp_in_use = 1; 537 538 mxcfb_info[mxcfbi->ipu_di] = fbi; 539 540 /* Need dummy values until real panel is configured */ 541 542 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt; 543 fb_videomode_to_var(&fbi->var, mode); 544 fbi->var.bits_per_pixel = 16; 545 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8); 546 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length; 547 548 mxcfb_check_var(&fbi->var, fbi); 549 550 /* Default Y virtual size is 2x panel size */ 551 fbi->var.yres_virtual = fbi->var.yres * 2; 552 553 mxcfb_set_fix(fbi); 554 555 /* alocate fb first */ 556 if (mxcfb_map_video_memory(fbi) < 0) 557 return -ENOMEM; 558 559 mxcfb_set_par(fbi); 560 561 panel.winSizeX = mode->xres; 562 panel.winSizeY = mode->yres; 563 panel.plnSizeX = mode->xres; 564 panel.plnSizeY = mode->yres; 565 566 panel.frameAdrs = (u32)fbi->screen_base; 567 panel.memSize = fbi->screen_size; 568 569 panel.gdfBytesPP = 2; 570 panel.gdfIndex = GDF_16BIT_565RGB; 571 572 ipu_dump_registers(); 573 574 return 0; 575 576 err0: 577 return ret; 578 } 579 580 void ipuv3_fb_shutdown(void) 581 { 582 int i; 583 struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT; 584 585 for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) { 586 struct fb_info *fbi = mxcfb_info[i]; 587 if (fbi) { 588 struct mxcfb_info *mxc_fbi = fbi->par; 589 ipu_disable_channel(mxc_fbi->ipu_ch); 590 ipu_uninit_channel(mxc_fbi->ipu_ch); 591 } 592 } 593 for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) { 594 __raw_writel(__raw_readl(&stat->int_stat[i]), 595 &stat->int_stat[i]); 596 } 597 } 598 599 void *video_hw_init(void) 600 { 601 int ret; 602 603 ret = ipu_probe(); 604 if (ret) 605 puts("Error initializing IPU\n"); 606 607 ret = mxcfb_probe(gpixfmt, gdisp, gmode); 608 debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs); 609 610 return (void *)&panel; 611 } 612 613 void video_set_lut(unsigned int index, /* color number */ 614 unsigned char r, /* red */ 615 unsigned char g, /* green */ 616 unsigned char b /* blue */ 617 ) 618 { 619 return; 620 } 621 622 int ipuv3_fb_init(struct fb_videomode const *mode, 623 uint8_t disp, 624 uint32_t pixfmt) 625 { 626 gmode = mode; 627 gdisp = disp; 628 gpixfmt = pixfmt; 629 630 return 0; 631 } 632