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 /* #define DEBUG */ 31 #include <common.h> 32 #include <asm/errno.h> 33 #include <linux/string.h> 34 #include <linux/list.h> 35 #include <linux/fb.h> 36 #include <asm/io.h> 37 #include <malloc.h> 38 #include <lcd.h> 39 #include "videomodes.h" 40 #include "ipu.h" 41 #include "mxcfb.h" 42 43 DECLARE_GLOBAL_DATA_PTR; 44 45 void *lcd_base; /* Start of framebuffer memory */ 46 void *lcd_console_address; /* Start of console buffer */ 47 48 int lcd_line_length; 49 int lcd_color_fg; 50 int lcd_color_bg; 51 52 short console_col; 53 short console_row; 54 55 vidinfo_t panel_info; 56 57 static int mxcfb_map_video_memory(struct fb_info *fbi); 58 static int mxcfb_unmap_video_memory(struct fb_info *fbi); 59 60 void lcd_initcolregs(void) 61 { 62 } 63 64 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) 65 { 66 } 67 68 void lcd_disable(void) 69 { 70 } 71 72 void lcd_panel_disable(void) 73 { 74 } 75 76 void fb_videomode_to_var(struct fb_var_screeninfo *var, 77 const struct fb_videomode *mode) 78 { 79 var->xres = mode->xres; 80 var->yres = mode->yres; 81 var->xres_virtual = mode->xres; 82 var->yres_virtual = mode->yres; 83 var->xoffset = 0; 84 var->yoffset = 0; 85 var->pixclock = mode->pixclock; 86 var->left_margin = mode->left_margin; 87 var->right_margin = mode->right_margin; 88 var->upper_margin = mode->upper_margin; 89 var->lower_margin = mode->lower_margin; 90 var->hsync_len = mode->hsync_len; 91 var->vsync_len = mode->vsync_len; 92 var->sync = mode->sync; 93 var->vmode = mode->vmode & FB_VMODE_MASK; 94 } 95 96 /* 97 * Structure containing the MXC specific framebuffer information. 98 */ 99 struct mxcfb_info { 100 int blank; 101 ipu_channel_t ipu_ch; 102 int ipu_di; 103 u32 ipu_di_pix_fmt; 104 unsigned char overlay; 105 unsigned char alpha_chan_en; 106 dma_addr_t alpha_phy_addr0; 107 dma_addr_t alpha_phy_addr1; 108 void *alpha_virt_addr0; 109 void *alpha_virt_addr1; 110 uint32_t alpha_mem_len; 111 uint32_t cur_ipu_buf; 112 uint32_t cur_ipu_alpha_buf; 113 114 u32 pseudo_palette[16]; 115 }; 116 117 enum { 118 BOTH_ON, 119 SRC_ON, 120 TGT_ON, 121 BOTH_OFF 122 }; 123 124 static unsigned long default_bpp = 16; 125 static unsigned char g_dp_in_use; 126 static struct fb_info *mxcfb_info[3]; 127 static int ext_clk_used; 128 129 static uint32_t bpp_to_pixfmt(struct fb_info *fbi) 130 { 131 uint32_t pixfmt = 0; 132 133 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel); 134 135 if (fbi->var.nonstd) 136 return fbi->var.nonstd; 137 138 switch (fbi->var.bits_per_pixel) { 139 case 24: 140 pixfmt = IPU_PIX_FMT_BGR24; 141 break; 142 case 32: 143 pixfmt = IPU_PIX_FMT_BGR32; 144 break; 145 case 16: 146 pixfmt = IPU_PIX_FMT_RGB565; 147 break; 148 } 149 return pixfmt; 150 } 151 152 /* 153 * Set fixed framebuffer parameters based on variable settings. 154 * 155 * @param info framebuffer information pointer 156 */ 157 static int mxcfb_set_fix(struct fb_info *info) 158 { 159 struct fb_fix_screeninfo *fix = &info->fix; 160 struct fb_var_screeninfo *var = &info->var; 161 162 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; 163 164 fix->type = FB_TYPE_PACKED_PIXELS; 165 fix->accel = FB_ACCEL_NONE; 166 fix->visual = FB_VISUAL_TRUECOLOR; 167 fix->xpanstep = 1; 168 fix->ypanstep = 1; 169 170 return 0; 171 } 172 173 static int setup_disp_channel1(struct fb_info *fbi) 174 { 175 ipu_channel_params_t params; 176 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 177 178 memset(¶ms, 0, sizeof(params)); 179 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di; 180 181 debug("%s called\n", __func__); 182 /* 183 * Assuming interlaced means yuv output, below setting also 184 * valid for mem_dc_sync. FG should have the same vmode as BG. 185 */ 186 if (fbi->var.vmode & FB_VMODE_INTERLACED) { 187 params.mem_dp_bg_sync.interlaced = 1; 188 params.mem_dp_bg_sync.out_pixel_fmt = 189 IPU_PIX_FMT_YUV444; 190 } else { 191 if (mxc_fbi->ipu_di_pix_fmt) { 192 params.mem_dp_bg_sync.out_pixel_fmt = 193 mxc_fbi->ipu_di_pix_fmt; 194 } else { 195 params.mem_dp_bg_sync.out_pixel_fmt = 196 IPU_PIX_FMT_RGB666; 197 } 198 } 199 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi); 200 if (mxc_fbi->alpha_chan_en) 201 params.mem_dp_bg_sync.alpha_chan_en = 1; 202 203 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms); 204 205 return 0; 206 } 207 208 static int setup_disp_channel2(struct fb_info *fbi) 209 { 210 int retval = 0; 211 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 212 213 mxc_fbi->cur_ipu_buf = 1; 214 if (mxc_fbi->alpha_chan_en) 215 mxc_fbi->cur_ipu_alpha_buf = 1; 216 217 fbi->var.xoffset = fbi->var.yoffset = 0; 218 219 debug("%s: %x %d %d %d %lx %lx\n", 220 __func__, 221 mxc_fbi->ipu_ch, 222 fbi->var.xres, 223 fbi->var.yres, 224 fbi->fix.line_length, 225 fbi->fix.smem_start, 226 fbi->fix.smem_start + 227 (fbi->fix.line_length * fbi->var.yres)); 228 229 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER, 230 bpp_to_pixfmt(fbi), 231 fbi->var.xres, fbi->var.yres, 232 fbi->fix.line_length, 233 fbi->fix.smem_start + 234 (fbi->fix.line_length * fbi->var.yres), 235 fbi->fix.smem_start, 236 0, 0); 237 if (retval) 238 printf("ipu_init_channel_buffer error %d\n", retval); 239 240 return retval; 241 } 242 243 /* 244 * Set framebuffer parameters and change the operating mode. 245 * 246 * @param info framebuffer information pointer 247 */ 248 static int mxcfb_set_par(struct fb_info *fbi) 249 { 250 int retval = 0; 251 u32 mem_len; 252 ipu_di_signal_cfg_t sig_cfg; 253 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; 254 uint32_t out_pixel_fmt; 255 256 ipu_disable_channel(mxc_fbi->ipu_ch); 257 ipu_uninit_channel(mxc_fbi->ipu_ch); 258 mxcfb_set_fix(fbi); 259 260 mem_len = fbi->var.yres_virtual * fbi->fix.line_length; 261 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) { 262 if (fbi->fix.smem_start) 263 mxcfb_unmap_video_memory(fbi); 264 265 if (mxcfb_map_video_memory(fbi) < 0) 266 return -ENOMEM; 267 } 268 269 setup_disp_channel1(fbi); 270 271 memset(&sig_cfg, 0, sizeof(sig_cfg)); 272 if (fbi->var.vmode & FB_VMODE_INTERLACED) { 273 sig_cfg.interlaced = 1; 274 out_pixel_fmt = IPU_PIX_FMT_YUV444; 275 } else { 276 if (mxc_fbi->ipu_di_pix_fmt) 277 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt; 278 else 279 out_pixel_fmt = IPU_PIX_FMT_RGB666; 280 } 281 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */ 282 sig_cfg.odd_field_first = 1; 283 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used) 284 sig_cfg.ext_clk = 1; 285 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT) 286 sig_cfg.Hsync_pol = 1; 287 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT) 288 sig_cfg.Vsync_pol = 1; 289 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL)) 290 sig_cfg.clk_pol = 1; 291 if (fbi->var.sync & FB_SYNC_DATA_INVERT) 292 sig_cfg.data_pol = 1; 293 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT)) 294 sig_cfg.enable_pol = 1; 295 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN) 296 sig_cfg.clkidle_en = 1; 297 298 debug("pixclock = %ul Hz\n", 299 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL)); 300 301 if (ipu_init_sync_panel(mxc_fbi->ipu_di, 302 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL, 303 fbi->var.xres, fbi->var.yres, 304 out_pixel_fmt, 305 fbi->var.left_margin, 306 fbi->var.hsync_len, 307 fbi->var.right_margin, 308 fbi->var.upper_margin, 309 fbi->var.vsync_len, 310 fbi->var.lower_margin, 311 0, sig_cfg) != 0) { 312 puts("mxcfb: Error initializing panel.\n"); 313 return -EINVAL; 314 } 315 316 retval = setup_disp_channel2(fbi); 317 if (retval) 318 return retval; 319 320 if (mxc_fbi->blank == FB_BLANK_UNBLANK) 321 ipu_enable_channel(mxc_fbi->ipu_ch); 322 323 return retval; 324 } 325 326 /* 327 * Check framebuffer variable parameters and adjust to valid values. 328 * 329 * @param var framebuffer variable parameters 330 * 331 * @param info framebuffer information pointer 332 */ 333 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 334 { 335 u32 vtotal; 336 u32 htotal; 337 338 if (var->xres_virtual < var->xres) 339 var->xres_virtual = var->xres; 340 if (var->yres_virtual < var->yres) 341 var->yres_virtual = var->yres; 342 343 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) && 344 (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8)) 345 var->bits_per_pixel = default_bpp; 346 347 switch (var->bits_per_pixel) { 348 case 8: 349 var->red.length = 3; 350 var->red.offset = 5; 351 var->red.msb_right = 0; 352 353 var->green.length = 3; 354 var->green.offset = 2; 355 var->green.msb_right = 0; 356 357 var->blue.length = 2; 358 var->blue.offset = 0; 359 var->blue.msb_right = 0; 360 361 var->transp.length = 0; 362 var->transp.offset = 0; 363 var->transp.msb_right = 0; 364 break; 365 case 16: 366 var->red.length = 5; 367 var->red.offset = 11; 368 var->red.msb_right = 0; 369 370 var->green.length = 6; 371 var->green.offset = 5; 372 var->green.msb_right = 0; 373 374 var->blue.length = 5; 375 var->blue.offset = 0; 376 var->blue.msb_right = 0; 377 378 var->transp.length = 0; 379 var->transp.offset = 0; 380 var->transp.msb_right = 0; 381 break; 382 case 24: 383 var->red.length = 8; 384 var->red.offset = 16; 385 var->red.msb_right = 0; 386 387 var->green.length = 8; 388 var->green.offset = 8; 389 var->green.msb_right = 0; 390 391 var->blue.length = 8; 392 var->blue.offset = 0; 393 var->blue.msb_right = 0; 394 395 var->transp.length = 0; 396 var->transp.offset = 0; 397 var->transp.msb_right = 0; 398 break; 399 case 32: 400 var->red.length = 8; 401 var->red.offset = 16; 402 var->red.msb_right = 0; 403 404 var->green.length = 8; 405 var->green.offset = 8; 406 var->green.msb_right = 0; 407 408 var->blue.length = 8; 409 var->blue.offset = 0; 410 var->blue.msb_right = 0; 411 412 var->transp.length = 8; 413 var->transp.offset = 24; 414 var->transp.msb_right = 0; 415 break; 416 } 417 418 if (var->pixclock < 1000) { 419 htotal = var->xres + var->right_margin + var->hsync_len + 420 var->left_margin; 421 vtotal = var->yres + var->lower_margin + var->vsync_len + 422 var->upper_margin; 423 var->pixclock = (vtotal * htotal * 6UL) / 100UL; 424 var->pixclock = KHZ2PICOS(var->pixclock); 425 printf("pixclock set for 60Hz refresh = %u ps\n", 426 var->pixclock); 427 } 428 429 var->height = -1; 430 var->width = -1; 431 var->grayscale = 0; 432 433 return 0; 434 } 435 436 static int mxcfb_map_video_memory(struct fb_info *fbi) 437 { 438 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) { 439 fbi->fix.smem_len = fbi->var.yres_virtual * 440 fbi->fix.line_length; 441 } 442 443 fbi->screen_base = (char *)lcd_base; 444 fbi->fix.smem_start = (unsigned long)lcd_base; 445 if (fbi->screen_base == 0) { 446 puts("Unable to allocate framebuffer memory\n"); 447 fbi->fix.smem_len = 0; 448 fbi->fix.smem_start = 0; 449 return -EBUSY; 450 } 451 452 debug("allocated fb @ paddr=0x%08X, size=%d.\n", 453 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len); 454 455 fbi->screen_size = fbi->fix.smem_len; 456 457 /* Clear the screen */ 458 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len); 459 460 return 0; 461 } 462 463 static int mxcfb_unmap_video_memory(struct fb_info *fbi) 464 { 465 fbi->screen_base = 0; 466 fbi->fix.smem_start = 0; 467 fbi->fix.smem_len = 0; 468 return 0; 469 } 470 471 /* 472 * Initializes the framebuffer information pointer. After allocating 473 * sufficient memory for the framebuffer structure, the fields are 474 * filled with custom information passed in from the configurable 475 * structures. This includes information such as bits per pixel, 476 * color maps, screen width/height and RGBA offsets. 477 * 478 * @return Framebuffer structure initialized with our information 479 */ 480 static struct fb_info *mxcfb_init_fbinfo(void) 481 { 482 #define BYTES_PER_LONG 4 483 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG)) 484 struct fb_info *fbi; 485 struct mxcfb_info *mxcfbi; 486 char *p; 487 int size = sizeof(struct mxcfb_info) + PADDING + 488 sizeof(struct fb_info); 489 490 debug("%s: %d %d %d %d\n", 491 __func__, 492 PADDING, 493 size, 494 sizeof(struct mxcfb_info), 495 sizeof(struct fb_info)); 496 /* 497 * Allocate sufficient memory for the fb structure 498 */ 499 500 p = malloc(size); 501 if (!p) 502 return NULL; 503 504 memset(p, 0, size); 505 506 fbi = (struct fb_info *)p; 507 fbi->par = p + sizeof(struct fb_info) + PADDING; 508 509 mxcfbi = (struct mxcfb_info *)fbi->par; 510 debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n", 511 (unsigned int)fbi, (unsigned int)mxcfbi); 512 513 fbi->var.activate = FB_ACTIVATE_NOW; 514 515 fbi->flags = FBINFO_FLAG_DEFAULT; 516 fbi->pseudo_palette = mxcfbi->pseudo_palette; 517 518 return fbi; 519 } 520 521 /* 522 * Probe routine for the framebuffer driver. It is called during the 523 * driver binding process. The following functions are performed in 524 * this routine: Framebuffer initialization, Memory allocation and 525 * mapping, Framebuffer registration, IPU initialization. 526 * 527 * @return Appropriate error code to the kernel common code 528 */ 529 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode) 530 { 531 struct fb_info *fbi; 532 struct mxcfb_info *mxcfbi; 533 int ret = 0; 534 535 /* 536 * Initialize FB structures 537 */ 538 fbi = mxcfb_init_fbinfo(); 539 if (!fbi) { 540 ret = -ENOMEM; 541 goto err0; 542 } 543 mxcfbi = (struct mxcfb_info *)fbi->par; 544 545 if (!g_dp_in_use) { 546 mxcfbi->ipu_ch = MEM_BG_SYNC; 547 mxcfbi->blank = FB_BLANK_UNBLANK; 548 } else { 549 mxcfbi->ipu_ch = MEM_DC_SYNC; 550 mxcfbi->blank = FB_BLANK_POWERDOWN; 551 } 552 553 mxcfbi->ipu_di = 0; 554 555 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80); 556 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0); 557 strcpy(fbi->fix.id, "DISP3 BG"); 558 559 g_dp_in_use = 1; 560 561 mxcfb_info[mxcfbi->ipu_di] = fbi; 562 563 /* Need dummy values until real panel is configured */ 564 fbi->var.xres = 640; 565 fbi->var.yres = 480; 566 fbi->var.bits_per_pixel = 16; 567 568 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt; 569 fb_videomode_to_var(&fbi->var, mode); 570 571 mxcfb_check_var(&fbi->var, fbi); 572 573 /* Default Y virtual size is 2x panel size */ 574 fbi->var.yres_virtual = fbi->var.yres * 2; 575 576 mxcfb_set_fix(fbi); 577 578 /* alocate fb first */ 579 if (mxcfb_map_video_memory(fbi) < 0) 580 return -ENOMEM; 581 582 mxcfb_set_par(fbi); 583 584 /* Setting panel_info for lcd */ 585 panel_info.cmap = NULL; 586 panel_info.vl_col = fbi->var.xres; 587 panel_info.vl_row = fbi->var.yres; 588 panel_info.vl_bpix = LCD_BPP; 589 590 lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8; 591 592 debug("MXC IPUV3 configured\n" 593 "XRES = %d YRES = %d BitsXpixel = %d\n", 594 panel_info.vl_col, 595 panel_info.vl_row, 596 panel_info.vl_bpix); 597 598 ipu_dump_registers(); 599 600 return 0; 601 602 err0: 603 return ret; 604 } 605 606 int overwrite_console(void) 607 { 608 /* Keep stdout / stderr on serial, our LCD is for splashscreen only */ 609 return 1; 610 } 611 612 void lcd_ctrl_init(void *lcdbase) 613 { 614 u32 mem_len = panel_info.vl_col * 615 panel_info.vl_row * 616 NBITS(panel_info.vl_bpix) / 8; 617 618 /* 619 * We rely on lcdbase being a physical address, i.e., either MMU off, 620 * or 1-to-1 mapping. Might want to add some virt2phys here. 621 */ 622 if (!lcdbase) 623 return; 624 625 memset(lcdbase, 0, mem_len); 626 } 627 628 int mx51_fb_init(struct fb_videomode *mode) 629 { 630 int ret; 631 632 ret = ipu_probe(); 633 if (ret) 634 puts("Error initializing IPU\n"); 635 636 lcd_base += 56; 637 638 debug("Framebuffer at 0x%x\n", (unsigned int)lcd_base); 639 ret = mxcfb_probe(IPU_PIX_FMT_RGB666, mode); 640 641 return ret; 642 } 643