1// SPDX-License-Identifier: GPL-2.0-only 2/* linux/drivers/video/sm501fb.c 3 * 4 * Copyright (c) 2006 Simtec Electronics 5 * Vincent Sanders <vince@simtec.co.uk> 6 * Ben Dooks <ben@simtec.co.uk> 7 * 8 * Framebuffer driver for the Silicon Motion SM501 9 */ 10 11#include <linux/module.h> 12#include <linux/kernel.h> 13#include <linux/errno.h> 14#include <linux/string.h> 15#include <linux/mm.h> 16#include <linux/tty.h> 17#include <linux/slab.h> 18#include <linux/delay.h> 19#include <linux/fb.h> 20#include <linux/init.h> 21#include <linux/vmalloc.h> 22#include <linux/dma-mapping.h> 23#include <linux/interrupt.h> 24#include <linux/workqueue.h> 25#include <linux/wait.h> 26#include <linux/platform_device.h> 27#include <linux/clk.h> 28#include <linux/console.h> 29#include <linux/io.h> 30 31#include <linux/uaccess.h> 32#include <asm/div64.h> 33 34#ifdef CONFIG_PM 35#include <linux/pm.h> 36#endif 37 38#include <linux/sm501.h> 39#include <linux/sm501-regs.h> 40 41#include "edid.h" 42 43static char *fb_mode = "640x480-16@60"; 44static unsigned long default_bpp = 16; 45 46static const struct fb_videomode sm501_default_mode = { 47 .refresh = 60, 48 .xres = 640, 49 .yres = 480, 50 .pixclock = 20833, 51 .left_margin = 142, 52 .right_margin = 13, 53 .upper_margin = 21, 54 .lower_margin = 1, 55 .hsync_len = 69, 56 .vsync_len = 3, 57 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 58 .vmode = FB_VMODE_NONINTERLACED 59}; 60 61#define NR_PALETTE 256 62 63enum sm501_controller { 64 HEAD_CRT = 0, 65 HEAD_PANEL = 1, 66}; 67 68/* SM501 memory address. 69 * 70 * This structure is used to track memory usage within the SM501 framebuffer 71 * allocation. The sm_addr field is stored as an offset as it is often used 72 * against both the physical and mapped addresses. 73 */ 74struct sm501_mem { 75 unsigned long size; 76 unsigned long sm_addr; /* offset from base of sm501 fb. */ 77 void __iomem *k_addr; 78}; 79 80/* private data that is shared between all frambuffers* */ 81struct sm501fb_info { 82 struct device *dev; 83 struct fb_info *fb[2]; /* fb info for both heads */ 84 struct resource *fbmem_res; /* framebuffer resource */ 85 struct resource *regs_res; /* registers resource */ 86 struct resource *regs2d_res; /* 2d registers resource */ 87 struct sm501_platdata_fb *pdata; /* our platform data */ 88 89 unsigned long pm_crt_ctrl; /* pm: crt ctrl save */ 90 91 int irq; 92 int swap_endian; /* set to swap rgb=>bgr */ 93 void __iomem *regs; /* remapped registers */ 94 void __iomem *regs2d; /* 2d remapped registers */ 95 void __iomem *fbmem; /* remapped framebuffer */ 96 size_t fbmem_len; /* length of remapped region */ 97 u8 *edid_data; 98}; 99 100/* per-framebuffer private data */ 101struct sm501fb_par { 102 u32 pseudo_palette[16]; 103 104 enum sm501_controller head; 105 struct sm501_mem cursor; 106 struct sm501_mem screen; 107 struct fb_ops ops; 108 109 void *store_fb; 110 void *store_cursor; 111 void __iomem *cursor_regs; 112 struct sm501fb_info *info; 113}; 114 115/* Helper functions */ 116 117static inline int h_total(struct fb_var_screeninfo *var) 118{ 119 return var->xres + var->left_margin + 120 var->right_margin + var->hsync_len; 121} 122 123static inline int v_total(struct fb_var_screeninfo *var) 124{ 125 return var->yres + var->upper_margin + 126 var->lower_margin + var->vsync_len; 127} 128 129/* sm501fb_sync_regs() 130 * 131 * This call is mainly for PCI bus systems where we need to 132 * ensure that any writes to the bus are completed before the 133 * next phase, or after completing a function. 134*/ 135 136static inline void sm501fb_sync_regs(struct sm501fb_info *info) 137{ 138 smc501_readl(info->regs); 139} 140 141/* sm501_alloc_mem 142 * 143 * This is an attempt to lay out memory for the two framebuffers and 144 * everything else 145 * 146 * |fbmem_res->start fbmem_res->end| 147 * | | 148 * |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K | 149 * |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-| 150 * 151 * The "spare" space is for the 2d engine data 152 * the fixed is space for the cursors (2x1Kbyte) 153 * 154 * we need to allocate memory for the 2D acceleration engine 155 * command list and the data for the engine to deal with. 156 * 157 * - all allocations must be 128bit aligned 158 * - cursors are 64x64x2 bits (1Kbyte) 159 * 160 */ 161 162#define SM501_MEMF_CURSOR (1) 163#define SM501_MEMF_PANEL (2) 164#define SM501_MEMF_CRT (4) 165#define SM501_MEMF_ACCEL (8) 166 167static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem, 168 unsigned int why, size_t size, u32 smem_len) 169{ 170 struct sm501fb_par *par; 171 struct fb_info *fbi; 172 unsigned int ptr; 173 unsigned int end; 174 175 switch (why) { 176 case SM501_MEMF_CURSOR: 177 ptr = inf->fbmem_len - size; 178 inf->fbmem_len = ptr; /* adjust available memory. */ 179 break; 180 181 case SM501_MEMF_PANEL: 182 if (size > inf->fbmem_len) 183 return -ENOMEM; 184 185 ptr = inf->fbmem_len - size; 186 fbi = inf->fb[HEAD_CRT]; 187 188 /* round down, some programs such as directfb do not draw 189 * 0,0 correctly unless the start is aligned to a page start. 190 */ 191 192 if (ptr > 0) 193 ptr &= ~(PAGE_SIZE - 1); 194 195 if (fbi && ptr < smem_len) 196 return -ENOMEM; 197 198 break; 199 200 case SM501_MEMF_CRT: 201 ptr = 0; 202 203 /* check to see if we have panel memory allocated 204 * which would put an limit on available memory. */ 205 206 fbi = inf->fb[HEAD_PANEL]; 207 if (fbi) { 208 par = fbi->par; 209 end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len; 210 } else 211 end = inf->fbmem_len; 212 213 if ((ptr + size) > end) 214 return -ENOMEM; 215 216 break; 217 218 case SM501_MEMF_ACCEL: 219 fbi = inf->fb[HEAD_CRT]; 220 ptr = fbi ? smem_len : 0; 221 222 fbi = inf->fb[HEAD_PANEL]; 223 if (fbi) { 224 par = fbi->par; 225 end = par->screen.sm_addr; 226 } else 227 end = inf->fbmem_len; 228 229 if ((ptr + size) > end) 230 return -ENOMEM; 231 232 break; 233 234 default: 235 return -EINVAL; 236 } 237 238 mem->size = size; 239 mem->sm_addr = ptr; 240 mem->k_addr = inf->fbmem + ptr; 241 242 dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n", 243 __func__, mem->sm_addr, mem->k_addr, why, size); 244 245 return 0; 246} 247 248/* sm501fb_ps_to_hz 249 * 250 * Converts a period in picoseconds to Hz. 251 * 252 * Note, we try to keep this in Hz to minimise rounding with 253 * the limited PLL settings on the SM501. 254*/ 255 256static unsigned long sm501fb_ps_to_hz(unsigned long psvalue) 257{ 258 unsigned long long numerator=1000000000000ULL; 259 260 /* 10^12 / picosecond period gives frequency in Hz */ 261 do_div(numerator, psvalue); 262 return (unsigned long)numerator; 263} 264 265/* sm501fb_hz_to_ps is identical to the opposite transform */ 266 267#define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x) 268 269/* sm501fb_setup_gamma 270 * 271 * Programs a linear 1.0 gamma ramp in case the gamma 272 * correction is enabled without programming anything else. 273*/ 274 275static void sm501fb_setup_gamma(struct sm501fb_info *fbi, 276 unsigned long palette) 277{ 278 unsigned long value = 0; 279 int offset; 280 281 /* set gamma values */ 282 for (offset = 0; offset < 256 * 4; offset += 4) { 283 smc501_writel(value, fbi->regs + palette + offset); 284 value += 0x010101; /* Advance RGB by 1,1,1.*/ 285 } 286} 287 288/* sm501fb_check_var 289 * 290 * check common variables for both panel and crt 291*/ 292 293static int sm501fb_check_var(struct fb_var_screeninfo *var, 294 struct fb_info *info) 295{ 296 struct sm501fb_par *par = info->par; 297 struct sm501fb_info *sm = par->info; 298 unsigned long tmp; 299 300 /* check we can fit these values into the registers */ 301 302 if (var->hsync_len > 255 || var->vsync_len > 63) 303 return -EINVAL; 304 305 /* hdisplay end and hsync start */ 306 if ((var->xres + var->right_margin) > 4096) 307 return -EINVAL; 308 309 /* vdisplay end and vsync start */ 310 if ((var->yres + var->lower_margin) > 2048) 311 return -EINVAL; 312 313 /* hard limits of device */ 314 315 if (h_total(var) > 4096 || v_total(var) > 2048) 316 return -EINVAL; 317 318 /* check our line length is going to be 128 bit aligned */ 319 320 tmp = (var->xres * var->bits_per_pixel) / 8; 321 if ((tmp & 15) != 0) 322 return -EINVAL; 323 324 /* check the virtual size */ 325 326 if (var->xres_virtual > 4096 || var->yres_virtual > 2048) 327 return -EINVAL; 328 329 /* can cope with 8,16 or 32bpp */ 330 331 if (var->bits_per_pixel <= 8) 332 var->bits_per_pixel = 8; 333 else if (var->bits_per_pixel <= 16) 334 var->bits_per_pixel = 16; 335 else if (var->bits_per_pixel == 24) 336 var->bits_per_pixel = 32; 337 338 /* set r/g/b positions and validate bpp */ 339 switch(var->bits_per_pixel) { 340 case 8: 341 var->red.length = var->bits_per_pixel; 342 var->red.offset = 0; 343 var->green.length = var->bits_per_pixel; 344 var->green.offset = 0; 345 var->blue.length = var->bits_per_pixel; 346 var->blue.offset = 0; 347 var->transp.length = 0; 348 var->transp.offset = 0; 349 350 break; 351 352 case 16: 353 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) { 354 var->blue.offset = 11; 355 var->green.offset = 5; 356 var->red.offset = 0; 357 } else { 358 var->red.offset = 11; 359 var->green.offset = 5; 360 var->blue.offset = 0; 361 } 362 var->transp.offset = 0; 363 364 var->red.length = 5; 365 var->green.length = 6; 366 var->blue.length = 5; 367 var->transp.length = 0; 368 break; 369 370 case 32: 371 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) { 372 var->transp.offset = 0; 373 var->red.offset = 8; 374 var->green.offset = 16; 375 var->blue.offset = 24; 376 } else { 377 var->transp.offset = 24; 378 var->red.offset = 16; 379 var->green.offset = 8; 380 var->blue.offset = 0; 381 } 382 383 var->red.length = 8; 384 var->green.length = 8; 385 var->blue.length = 8; 386 var->transp.length = 0; 387 break; 388 389 default: 390 return -EINVAL; 391 } 392 393 return 0; 394} 395 396/* 397 * sm501fb_check_var_crt(): 398 * 399 * check the parameters for the CRT head, and either bring them 400 * back into range, or return -EINVAL. 401*/ 402 403static int sm501fb_check_var_crt(struct fb_var_screeninfo *var, 404 struct fb_info *info) 405{ 406 return sm501fb_check_var(var, info); 407} 408 409/* sm501fb_check_var_pnl(): 410 * 411 * check the parameters for the CRT head, and either bring them 412 * back into range, or return -EINVAL. 413*/ 414 415static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var, 416 struct fb_info *info) 417{ 418 return sm501fb_check_var(var, info); 419} 420 421/* sm501fb_set_par_common 422 * 423 * set common registers for framebuffers 424*/ 425 426static int sm501fb_set_par_common(struct fb_info *info, 427 struct fb_var_screeninfo *var) 428{ 429 struct sm501fb_par *par = info->par; 430 struct sm501fb_info *fbi = par->info; 431 unsigned long pixclock; /* pixelclock in Hz */ 432 unsigned long sm501pixclock; /* pixelclock the 501 can achieve in Hz */ 433 unsigned int mem_type; 434 unsigned int clock_type; 435 unsigned int head_addr; 436 unsigned int smem_len; 437 438 dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n", 439 __func__, var->xres, var->yres, var->bits_per_pixel, 440 var->xres_virtual, var->yres_virtual); 441 442 switch (par->head) { 443 case HEAD_CRT: 444 mem_type = SM501_MEMF_CRT; 445 clock_type = SM501_CLOCK_V2XCLK; 446 head_addr = SM501_DC_CRT_FB_ADDR; 447 break; 448 449 case HEAD_PANEL: 450 mem_type = SM501_MEMF_PANEL; 451 clock_type = SM501_CLOCK_P2XCLK; 452 head_addr = SM501_DC_PANEL_FB_ADDR; 453 break; 454 455 default: 456 mem_type = 0; /* stop compiler warnings */ 457 head_addr = 0; 458 clock_type = 0; 459 } 460 461 switch (var->bits_per_pixel) { 462 case 8: 463 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 464 break; 465 466 case 16: 467 info->fix.visual = FB_VISUAL_TRUECOLOR; 468 break; 469 470 case 32: 471 info->fix.visual = FB_VISUAL_TRUECOLOR; 472 break; 473 } 474 475 /* allocate fb memory within 501 */ 476 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8; 477 smem_len = info->fix.line_length * var->yres_virtual; 478 479 dev_dbg(fbi->dev, "%s: line length = %u\n", __func__, 480 info->fix.line_length); 481 482 if (sm501_alloc_mem(fbi, &par->screen, mem_type, smem_len, smem_len)) { 483 dev_err(fbi->dev, "no memory available\n"); 484 return -ENOMEM; 485 } 486 487 mutex_lock(&info->mm_lock); 488 info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr; 489 info->fix.smem_len = smem_len; 490 mutex_unlock(&info->mm_lock); 491 492 info->screen_base = fbi->fbmem + par->screen.sm_addr; 493 info->screen_size = info->fix.smem_len; 494 495 /* set start of framebuffer to the screen */ 496 497 smc501_writel(par->screen.sm_addr | SM501_ADDR_FLIP, 498 fbi->regs + head_addr); 499 500 /* program CRT clock */ 501 502 pixclock = sm501fb_ps_to_hz(var->pixclock); 503 504 sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type, 505 pixclock); 506 507 /* update fb layer with actual clock used */ 508 var->pixclock = sm501fb_hz_to_ps(sm501pixclock); 509 510 dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, " 511 "sm501pixclock = %lu, error = %ld%%\n", 512 __func__, var->pixclock, pixclock, sm501pixclock, 513 ((pixclock - sm501pixclock)*100)/pixclock); 514 515 return 0; 516} 517 518/* sm501fb_set_par_geometry 519 * 520 * set the geometry registers for specified framebuffer. 521*/ 522 523static void sm501fb_set_par_geometry(struct fb_info *info, 524 struct fb_var_screeninfo *var) 525{ 526 struct sm501fb_par *par = info->par; 527 struct sm501fb_info *fbi = par->info; 528 void __iomem *base = fbi->regs; 529 unsigned long reg; 530 531 if (par->head == HEAD_CRT) 532 base += SM501_DC_CRT_H_TOT; 533 else 534 base += SM501_DC_PANEL_H_TOT; 535 536 /* set framebuffer width and display width */ 537 538 reg = info->fix.line_length; 539 reg |= ((var->xres * var->bits_per_pixel)/8) << 16; 540 541 smc501_writel(reg, fbi->regs + (par->head == HEAD_CRT ? 542 SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET)); 543 544 /* program horizontal total */ 545 546 reg = (h_total(var) - 1) << 16; 547 reg |= (var->xres - 1); 548 549 smc501_writel(reg, base + SM501_OFF_DC_H_TOT); 550 551 /* program horizontal sync */ 552 553 reg = var->hsync_len << 16; 554 reg |= var->xres + var->right_margin - 1; 555 556 smc501_writel(reg, base + SM501_OFF_DC_H_SYNC); 557 558 /* program vertical total */ 559 560 reg = (v_total(var) - 1) << 16; 561 reg |= (var->yres - 1); 562 563 smc501_writel(reg, base + SM501_OFF_DC_V_TOT); 564 565 /* program vertical sync */ 566 reg = var->vsync_len << 16; 567 reg |= var->yres + var->lower_margin - 1; 568 569 smc501_writel(reg, base + SM501_OFF_DC_V_SYNC); 570} 571 572/* sm501fb_pan_crt 573 * 574 * pan the CRT display output within an virtual framebuffer 575*/ 576 577static int sm501fb_pan_crt(struct fb_var_screeninfo *var, 578 struct fb_info *info) 579{ 580 struct sm501fb_par *par = info->par; 581 struct sm501fb_info *fbi = par->info; 582 unsigned int bytes_pixel = info->var.bits_per_pixel / 8; 583 unsigned long reg; 584 unsigned long xoffs; 585 586 xoffs = var->xoffset * bytes_pixel; 587 588 reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL); 589 590 reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK; 591 reg |= ((xoffs & 15) / bytes_pixel) << 4; 592 smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL); 593 594 reg = (par->screen.sm_addr + xoffs + 595 var->yoffset * info->fix.line_length); 596 smc501_writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR); 597 598 sm501fb_sync_regs(fbi); 599 return 0; 600} 601 602/* sm501fb_pan_pnl 603 * 604 * pan the panel display output within an virtual framebuffer 605*/ 606 607static int sm501fb_pan_pnl(struct fb_var_screeninfo *var, 608 struct fb_info *info) 609{ 610 struct sm501fb_par *par = info->par; 611 struct sm501fb_info *fbi = par->info; 612 unsigned long reg; 613 614 reg = var->xoffset | (info->var.xres_virtual << 16); 615 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH); 616 617 reg = var->yoffset | (info->var.yres_virtual << 16); 618 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT); 619 620 sm501fb_sync_regs(fbi); 621 return 0; 622} 623 624/* sm501fb_set_par_crt 625 * 626 * Set the CRT video mode from the fb_info structure 627*/ 628 629static int sm501fb_set_par_crt(struct fb_info *info) 630{ 631 struct sm501fb_par *par = info->par; 632 struct sm501fb_info *fbi = par->info; 633 struct fb_var_screeninfo *var = &info->var; 634 unsigned long control; /* control register */ 635 int ret; 636 637 /* activate new configuration */ 638 639 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info); 640 641 /* enable CRT DAC - note 0 is on!*/ 642 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER); 643 644 control = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL); 645 646 control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK | 647 SM501_DC_CRT_CONTROL_GAMMA | 648 SM501_DC_CRT_CONTROL_BLANK | 649 SM501_DC_CRT_CONTROL_SEL | 650 SM501_DC_CRT_CONTROL_CP | 651 SM501_DC_CRT_CONTROL_TVP); 652 653 /* set the sync polarities before we check data source */ 654 655 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0) 656 control |= SM501_DC_CRT_CONTROL_HSP; 657 658 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0) 659 control |= SM501_DC_CRT_CONTROL_VSP; 660 661 if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) { 662 /* the head is displaying panel data... */ 663 664 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0, 665 info->fix.smem_len); 666 goto out_update; 667 } 668 669 ret = sm501fb_set_par_common(info, var); 670 if (ret) { 671 dev_err(fbi->dev, "failed to set common parameters\n"); 672 return ret; 673 } 674 675 sm501fb_pan_crt(var, info); 676 sm501fb_set_par_geometry(info, var); 677 678 control |= SM501_FIFO_3; /* fill if >3 free slots */ 679 680 switch(var->bits_per_pixel) { 681 case 8: 682 control |= SM501_DC_CRT_CONTROL_8BPP; 683 break; 684 685 case 16: 686 control |= SM501_DC_CRT_CONTROL_16BPP; 687 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE); 688 break; 689 690 case 32: 691 control |= SM501_DC_CRT_CONTROL_32BPP; 692 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE); 693 break; 694 695 default: 696 BUG(); 697 } 698 699 control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */ 700 control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */ 701 control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */ 702 703 out_update: 704 dev_dbg(fbi->dev, "new control is %08lx\n", control); 705 706 smc501_writel(control, fbi->regs + SM501_DC_CRT_CONTROL); 707 sm501fb_sync_regs(fbi); 708 709 return 0; 710} 711 712static void sm501fb_panel_power(struct sm501fb_info *fbi, int to) 713{ 714 unsigned long control; 715 void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL; 716 struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl; 717 718 control = smc501_readl(ctrl_reg); 719 720 if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) { 721 /* enable panel power */ 722 723 control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */ 724 smc501_writel(control, ctrl_reg); 725 sm501fb_sync_regs(fbi); 726 mdelay(10); 727 728 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */ 729 smc501_writel(control, ctrl_reg); 730 sm501fb_sync_regs(fbi); 731 mdelay(10); 732 733 /* VBIASEN */ 734 735 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) { 736 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN) 737 control &= ~SM501_DC_PANEL_CONTROL_BIAS; 738 else 739 control |= SM501_DC_PANEL_CONTROL_BIAS; 740 741 smc501_writel(control, ctrl_reg); 742 sm501fb_sync_regs(fbi); 743 mdelay(10); 744 } 745 746 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) { 747 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN) 748 control &= ~SM501_DC_PANEL_CONTROL_FPEN; 749 else 750 control |= SM501_DC_PANEL_CONTROL_FPEN; 751 752 smc501_writel(control, ctrl_reg); 753 sm501fb_sync_regs(fbi); 754 mdelay(10); 755 } 756 } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) { 757 /* disable panel power */ 758 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) { 759 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN) 760 control |= SM501_DC_PANEL_CONTROL_FPEN; 761 else 762 control &= ~SM501_DC_PANEL_CONTROL_FPEN; 763 764 smc501_writel(control, ctrl_reg); 765 sm501fb_sync_regs(fbi); 766 mdelay(10); 767 } 768 769 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) { 770 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN) 771 control |= SM501_DC_PANEL_CONTROL_BIAS; 772 else 773 control &= ~SM501_DC_PANEL_CONTROL_BIAS; 774 775 smc501_writel(control, ctrl_reg); 776 sm501fb_sync_regs(fbi); 777 mdelay(10); 778 } 779 780 control &= ~SM501_DC_PANEL_CONTROL_DATA; 781 smc501_writel(control, ctrl_reg); 782 sm501fb_sync_regs(fbi); 783 mdelay(10); 784 785 control &= ~SM501_DC_PANEL_CONTROL_VDD; 786 smc501_writel(control, ctrl_reg); 787 sm501fb_sync_regs(fbi); 788 mdelay(10); 789 } 790 791 sm501fb_sync_regs(fbi); 792} 793 794/* sm501fb_set_par_pnl 795 * 796 * Set the panel video mode from the fb_info structure 797*/ 798 799static int sm501fb_set_par_pnl(struct fb_info *info) 800{ 801 struct sm501fb_par *par = info->par; 802 struct sm501fb_info *fbi = par->info; 803 struct fb_var_screeninfo *var = &info->var; 804 unsigned long control; 805 unsigned long reg; 806 int ret; 807 808 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info); 809 810 /* activate this new configuration */ 811 812 ret = sm501fb_set_par_common(info, var); 813 if (ret) 814 return ret; 815 816 sm501fb_pan_pnl(var, info); 817 sm501fb_set_par_geometry(info, var); 818 819 /* update control register */ 820 821 control = smc501_readl(fbi->regs + SM501_DC_PANEL_CONTROL); 822 control &= (SM501_DC_PANEL_CONTROL_GAMMA | 823 SM501_DC_PANEL_CONTROL_VDD | 824 SM501_DC_PANEL_CONTROL_DATA | 825 SM501_DC_PANEL_CONTROL_BIAS | 826 SM501_DC_PANEL_CONTROL_FPEN | 827 SM501_DC_PANEL_CONTROL_CP | 828 SM501_DC_PANEL_CONTROL_CK | 829 SM501_DC_PANEL_CONTROL_HP | 830 SM501_DC_PANEL_CONTROL_VP | 831 SM501_DC_PANEL_CONTROL_HPD | 832 SM501_DC_PANEL_CONTROL_VPD); 833 834 control |= SM501_FIFO_3; /* fill if >3 free slots */ 835 836 switch(var->bits_per_pixel) { 837 case 8: 838 control |= SM501_DC_PANEL_CONTROL_8BPP; 839 break; 840 841 case 16: 842 control |= SM501_DC_PANEL_CONTROL_16BPP; 843 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE); 844 break; 845 846 case 32: 847 control |= SM501_DC_PANEL_CONTROL_32BPP; 848 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE); 849 break; 850 851 default: 852 BUG(); 853 } 854 855 smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL); 856 857 /* panel plane top left and bottom right location */ 858 859 smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC); 860 861 reg = var->xres - 1; 862 reg |= (var->yres - 1) << 16; 863 864 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC); 865 866 /* program panel control register */ 867 868 control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */ 869 control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */ 870 871 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0) 872 control |= SM501_DC_PANEL_CONTROL_HSP; 873 874 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0) 875 control |= SM501_DC_PANEL_CONTROL_VSP; 876 877 smc501_writel(control, fbi->regs + SM501_DC_PANEL_CONTROL); 878 sm501fb_sync_regs(fbi); 879 880 /* ensure the panel interface is not tristated at this point */ 881 882 sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL, 883 0, SM501_SYSCTRL_PANEL_TRISTATE); 884 885 /* power the panel up */ 886 sm501fb_panel_power(fbi, 1); 887 return 0; 888} 889 890 891/* chan_to_field 892 * 893 * convert a colour value into a field position 894 * 895 * from pxafb.c 896*/ 897 898static inline unsigned int chan_to_field(unsigned int chan, 899 struct fb_bitfield *bf) 900{ 901 chan &= 0xffff; 902 chan >>= 16 - bf->length; 903 return chan << bf->offset; 904} 905 906/* sm501fb_setcolreg 907 * 908 * set the colour mapping for modes that support palettised data 909*/ 910 911static int sm501fb_setcolreg(unsigned regno, 912 unsigned red, unsigned green, unsigned blue, 913 unsigned transp, struct fb_info *info) 914{ 915 struct sm501fb_par *par = info->par; 916 struct sm501fb_info *fbi = par->info; 917 void __iomem *base = fbi->regs; 918 unsigned int val; 919 920 if (par->head == HEAD_CRT) 921 base += SM501_DC_CRT_PALETTE; 922 else 923 base += SM501_DC_PANEL_PALETTE; 924 925 switch (info->fix.visual) { 926 case FB_VISUAL_TRUECOLOR: 927 /* true-colour, use pseuo-palette */ 928 929 if (regno < 16) { 930 u32 *pal = par->pseudo_palette; 931 932 val = chan_to_field(red, &info->var.red); 933 val |= chan_to_field(green, &info->var.green); 934 val |= chan_to_field(blue, &info->var.blue); 935 936 pal[regno] = val; 937 } 938 break; 939 940 case FB_VISUAL_PSEUDOCOLOR: 941 if (regno < 256) { 942 val = (red >> 8) << 16; 943 val |= (green >> 8) << 8; 944 val |= blue >> 8; 945 946 smc501_writel(val, base + (regno * 4)); 947 } 948 949 break; 950 951 default: 952 return 1; /* unknown type */ 953 } 954 955 return 0; 956} 957 958/* sm501fb_blank_pnl 959 * 960 * Blank or un-blank the panel interface 961*/ 962 963static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info) 964{ 965 struct sm501fb_par *par = info->par; 966 struct sm501fb_info *fbi = par->info; 967 968 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info); 969 970 switch (blank_mode) { 971 case FB_BLANK_POWERDOWN: 972 sm501fb_panel_power(fbi, 0); 973 break; 974 975 case FB_BLANK_UNBLANK: 976 sm501fb_panel_power(fbi, 1); 977 break; 978 979 case FB_BLANK_NORMAL: 980 case FB_BLANK_VSYNC_SUSPEND: 981 case FB_BLANK_HSYNC_SUSPEND: 982 default: 983 return 1; 984 } 985 986 return 0; 987} 988 989/* sm501fb_blank_crt 990 * 991 * Blank or un-blank the crt interface 992*/ 993 994static int sm501fb_blank_crt(int blank_mode, struct fb_info *info) 995{ 996 struct sm501fb_par *par = info->par; 997 struct sm501fb_info *fbi = par->info; 998 unsigned long ctrl; 999 1000 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info); 1001 1002 ctrl = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL); 1003 1004 switch (blank_mode) { 1005 case FB_BLANK_POWERDOWN: 1006 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE; 1007 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0); 1008 fallthrough; 1009 1010 case FB_BLANK_NORMAL: 1011 ctrl |= SM501_DC_CRT_CONTROL_BLANK; 1012 break; 1013 1014 case FB_BLANK_UNBLANK: 1015 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK; 1016 ctrl |= SM501_DC_CRT_CONTROL_ENABLE; 1017 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER); 1018 break; 1019 1020 case FB_BLANK_VSYNC_SUSPEND: 1021 case FB_BLANK_HSYNC_SUSPEND: 1022 default: 1023 return 1; 1024 1025 } 1026 1027 smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL); 1028 sm501fb_sync_regs(fbi); 1029 1030 return 0; 1031} 1032 1033/* sm501fb_cursor 1034 * 1035 * set or change the hardware cursor parameters 1036*/ 1037 1038static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor) 1039{ 1040 struct sm501fb_par *par = info->par; 1041 struct sm501fb_info *fbi = par->info; 1042 void __iomem *base = fbi->regs; 1043 unsigned long hwc_addr; 1044 unsigned long fg, bg; 1045 1046 dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor); 1047 1048 if (par->head == HEAD_CRT) 1049 base += SM501_DC_CRT_HWC_BASE; 1050 else 1051 base += SM501_DC_PANEL_HWC_BASE; 1052 1053 /* check not being asked to exceed capabilities */ 1054 1055 if (cursor->image.width > 64) 1056 return -EINVAL; 1057 1058 if (cursor->image.height > 64) 1059 return -EINVAL; 1060 1061 if (cursor->image.depth > 1) 1062 return -EINVAL; 1063 1064 hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR); 1065 1066 if (cursor->enable) 1067 smc501_writel(hwc_addr | SM501_HWC_EN, 1068 base + SM501_OFF_HWC_ADDR); 1069 else 1070 smc501_writel(hwc_addr & ~SM501_HWC_EN, 1071 base + SM501_OFF_HWC_ADDR); 1072 1073 /* set data */ 1074 if (cursor->set & FB_CUR_SETPOS) { 1075 unsigned int x = cursor->image.dx; 1076 unsigned int y = cursor->image.dy; 1077 1078 if (x >= 2048 || y >= 2048 ) 1079 return -EINVAL; 1080 1081 dev_dbg(fbi->dev, "set position %d,%d\n", x, y); 1082 1083 //y += cursor->image.height; 1084 1085 smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC); 1086 } 1087 1088 if (cursor->set & FB_CUR_SETCMAP) { 1089 unsigned int bg_col = cursor->image.bg_color; 1090 unsigned int fg_col = cursor->image.fg_color; 1091 1092 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n", 1093 __func__, bg_col, fg_col); 1094 1095 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) | 1096 ((info->cmap.green[bg_col] & 0xFC) << 3) | 1097 ((info->cmap.blue[bg_col] & 0xF8) >> 3); 1098 1099 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) | 1100 ((info->cmap.green[fg_col] & 0xFC) << 3) | 1101 ((info->cmap.blue[fg_col] & 0xF8) >> 3); 1102 1103 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg); 1104 1105 smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2); 1106 smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3); 1107 } 1108 1109 if (cursor->set & FB_CUR_SETSIZE || 1110 cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) { 1111 /* SM501 cursor is a two bpp 64x64 bitmap this routine 1112 * clears it to transparent then combines the cursor 1113 * shape plane with the colour plane to set the 1114 * cursor */ 1115 int x, y; 1116 const unsigned char *pcol = cursor->image.data; 1117 const unsigned char *pmsk = cursor->mask; 1118 void __iomem *dst = par->cursor.k_addr; 1119 unsigned char dcol = 0; 1120 unsigned char dmsk = 0; 1121 unsigned int op; 1122 1123 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n", 1124 __func__, cursor->image.width, cursor->image.height); 1125 1126 for (op = 0; op < (64*64*2)/8; op+=4) 1127 smc501_writel(0x0, dst + op); 1128 1129 for (y = 0; y < cursor->image.height; y++) { 1130 for (x = 0; x < cursor->image.width; x++) { 1131 if ((x % 8) == 0) { 1132 dcol = *pcol++; 1133 dmsk = *pmsk++; 1134 } else { 1135 dcol >>= 1; 1136 dmsk >>= 1; 1137 } 1138 1139 if (dmsk & 1) { 1140 op = (dcol & 1) ? 1 : 3; 1141 op <<= ((x % 4) * 2); 1142 1143 op |= readb(dst + (x / 4)); 1144 writeb(op, dst + (x / 4)); 1145 } 1146 } 1147 dst += (64*2)/8; 1148 } 1149 } 1150 1151 sm501fb_sync_regs(fbi); /* ensure cursor data flushed */ 1152 return 0; 1153} 1154 1155/* sm501fb_crtsrc_show 1156 * 1157 * device attribute code to show where the crt output is sourced from 1158*/ 1159 1160static ssize_t sm501fb_crtsrc_show(struct device *dev, 1161 struct device_attribute *attr, char *buf) 1162{ 1163 struct sm501fb_info *info = dev_get_drvdata(dev); 1164 unsigned long ctrl; 1165 1166 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL); 1167 ctrl &= SM501_DC_CRT_CONTROL_SEL; 1168 1169 return sysfs_emit(buf, "%s\n", ctrl ? "crt" : "panel"); 1170} 1171 1172/* sm501fb_crtsrc_show 1173 * 1174 * device attribute code to set where the crt output is sourced from 1175*/ 1176 1177static ssize_t sm501fb_crtsrc_store(struct device *dev, 1178 struct device_attribute *attr, 1179 const char *buf, size_t len) 1180{ 1181 struct sm501fb_info *info = dev_get_drvdata(dev); 1182 enum sm501_controller head; 1183 unsigned long ctrl; 1184 1185 if (len < 1) 1186 return -EINVAL; 1187 1188 if (strncasecmp(buf, "crt", 3) == 0) 1189 head = HEAD_CRT; 1190 else if (strncasecmp(buf, "panel", 5) == 0) 1191 head = HEAD_PANEL; 1192 else 1193 return -EINVAL; 1194 1195 dev_info(dev, "setting crt source to head %d\n", head); 1196 1197 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL); 1198 1199 if (head == HEAD_CRT) { 1200 ctrl |= SM501_DC_CRT_CONTROL_SEL; 1201 ctrl |= SM501_DC_CRT_CONTROL_ENABLE; 1202 ctrl |= SM501_DC_CRT_CONTROL_TE; 1203 } else { 1204 ctrl &= ~SM501_DC_CRT_CONTROL_SEL; 1205 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE; 1206 ctrl &= ~SM501_DC_CRT_CONTROL_TE; 1207 } 1208 1209 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); 1210 sm501fb_sync_regs(info); 1211 1212 return len; 1213} 1214 1215/* Prepare the device_attr for registration with sysfs later */ 1216static DEVICE_ATTR(crt_src, 0664, sm501fb_crtsrc_show, sm501fb_crtsrc_store); 1217 1218/* sm501fb_show_regs 1219 * 1220 * show the primary sm501 registers 1221*/ 1222static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr, 1223 unsigned int start, unsigned int len) 1224{ 1225 void __iomem *mem = info->regs; 1226 char *buf = ptr; 1227 unsigned int reg; 1228 1229 for (reg = start; reg < (len + start); reg += 4) 1230 ptr += sprintf(ptr, "%08x = %08x\n", reg, 1231 smc501_readl(mem + reg)); 1232 1233 return ptr - buf; 1234} 1235 1236/* sm501fb_debug_show_crt 1237 * 1238 * show the crt control and cursor registers 1239*/ 1240 1241static ssize_t sm501fb_debug_show_crt(struct device *dev, 1242 struct device_attribute *attr, char *buf) 1243{ 1244 struct sm501fb_info *info = dev_get_drvdata(dev); 1245 char *ptr = buf; 1246 1247 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40); 1248 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10); 1249 1250 return ptr - buf; 1251} 1252 1253static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL); 1254 1255/* sm501fb_debug_show_pnl 1256 * 1257 * show the panel control and cursor registers 1258*/ 1259 1260static ssize_t sm501fb_debug_show_pnl(struct device *dev, 1261 struct device_attribute *attr, char *buf) 1262{ 1263 struct sm501fb_info *info = dev_get_drvdata(dev); 1264 char *ptr = buf; 1265 1266 ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40); 1267 ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10); 1268 1269 return ptr - buf; 1270} 1271 1272static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL); 1273 1274static struct attribute *sm501fb_attrs[] = { 1275 &dev_attr_crt_src.attr, 1276 &dev_attr_fbregs_pnl.attr, 1277 &dev_attr_fbregs_crt.attr, 1278 NULL, 1279}; 1280ATTRIBUTE_GROUPS(sm501fb); 1281 1282/* acceleration operations */ 1283static int sm501fb_sync(struct fb_info *info) 1284{ 1285 int count = 1000000; 1286 struct sm501fb_par *par = info->par; 1287 struct sm501fb_info *fbi = par->info; 1288 1289 /* wait for the 2d engine to be ready */ 1290 while ((count > 0) && 1291 (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) & 1292 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0) 1293 count--; 1294 1295 if (count <= 0) { 1296 fb_err(info, "Timeout waiting for 2d engine sync\n"); 1297 return 1; 1298 } 1299 return 0; 1300} 1301 1302static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area) 1303{ 1304 struct sm501fb_par *par = info->par; 1305 struct sm501fb_info *fbi = par->info; 1306 int width = area->width; 1307 int height = area->height; 1308 int sx = area->sx; 1309 int sy = area->sy; 1310 int dx = area->dx; 1311 int dy = area->dy; 1312 unsigned long rtl = 0; 1313 1314 /* source clip */ 1315 if ((sx >= info->var.xres_virtual) || 1316 (sy >= info->var.yres_virtual)) 1317 /* source Area not within virtual screen, skipping */ 1318 return; 1319 if ((sx + width) >= info->var.xres_virtual) 1320 width = info->var.xres_virtual - sx - 1; 1321 if ((sy + height) >= info->var.yres_virtual) 1322 height = info->var.yres_virtual - sy - 1; 1323 1324 /* dest clip */ 1325 if ((dx >= info->var.xres_virtual) || 1326 (dy >= info->var.yres_virtual)) 1327 /* Destination Area not within virtual screen, skipping */ 1328 return; 1329 if ((dx + width) >= info->var.xres_virtual) 1330 width = info->var.xres_virtual - dx - 1; 1331 if ((dy + height) >= info->var.yres_virtual) 1332 height = info->var.yres_virtual - dy - 1; 1333 1334 if ((sx < dx) || (sy < dy)) { 1335 rtl = 1 << 27; 1336 sx += width - 1; 1337 dx += width - 1; 1338 sy += height - 1; 1339 dy += height - 1; 1340 } 1341 1342 if (sm501fb_sync(info)) 1343 return; 1344 1345 /* set the base addresses */ 1346 smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE); 1347 smc501_writel(par->screen.sm_addr, 1348 fbi->regs2d + SM501_2D_DESTINATION_BASE); 1349 1350 /* set the window width */ 1351 smc501_writel((info->var.xres << 16) | info->var.xres, 1352 fbi->regs2d + SM501_2D_WINDOW_WIDTH); 1353 1354 /* set window stride */ 1355 smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual, 1356 fbi->regs2d + SM501_2D_PITCH); 1357 1358 /* set data format */ 1359 switch (info->var.bits_per_pixel) { 1360 case 8: 1361 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH); 1362 break; 1363 case 16: 1364 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH); 1365 break; 1366 case 32: 1367 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH); 1368 break; 1369 } 1370 1371 /* 2d compare mask */ 1372 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK); 1373 1374 /* 2d mask */ 1375 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK); 1376 1377 /* source and destination x y */ 1378 smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE); 1379 smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION); 1380 1381 /* w/h */ 1382 smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION); 1383 1384 /* do area move */ 1385 smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL); 1386} 1387 1388static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) 1389{ 1390 struct sm501fb_par *par = info->par; 1391 struct sm501fb_info *fbi = par->info; 1392 int width = rect->width, height = rect->height; 1393 1394 if ((rect->dx >= info->var.xres_virtual) || 1395 (rect->dy >= info->var.yres_virtual)) 1396 /* Rectangle not within virtual screen, skipping */ 1397 return; 1398 if ((rect->dx + width) >= info->var.xres_virtual) 1399 width = info->var.xres_virtual - rect->dx - 1; 1400 if ((rect->dy + height) >= info->var.yres_virtual) 1401 height = info->var.yres_virtual - rect->dy - 1; 1402 1403 if (sm501fb_sync(info)) 1404 return; 1405 1406 /* set the base addresses */ 1407 smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE); 1408 smc501_writel(par->screen.sm_addr, 1409 fbi->regs2d + SM501_2D_DESTINATION_BASE); 1410 1411 /* set the window width */ 1412 smc501_writel((info->var.xres << 16) | info->var.xres, 1413 fbi->regs2d + SM501_2D_WINDOW_WIDTH); 1414 1415 /* set window stride */ 1416 smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual, 1417 fbi->regs2d + SM501_2D_PITCH); 1418 1419 /* set data format */ 1420 switch (info->var.bits_per_pixel) { 1421 case 8: 1422 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH); 1423 break; 1424 case 16: 1425 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH); 1426 break; 1427 case 32: 1428 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH); 1429 break; 1430 } 1431 1432 /* 2d compare mask */ 1433 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK); 1434 1435 /* 2d mask */ 1436 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK); 1437 1438 /* colour */ 1439 smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND); 1440 1441 /* x y */ 1442 smc501_writel((rect->dx << 16) | rect->dy, 1443 fbi->regs2d + SM501_2D_DESTINATION); 1444 1445 /* w/h */ 1446 smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION); 1447 1448 /* do rectangle fill */ 1449 smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL); 1450} 1451 1452 1453static struct fb_ops sm501fb_ops_crt = { 1454 .owner = THIS_MODULE, 1455 .fb_check_var = sm501fb_check_var_crt, 1456 .fb_set_par = sm501fb_set_par_crt, 1457 .fb_blank = sm501fb_blank_crt, 1458 .fb_setcolreg = sm501fb_setcolreg, 1459 .fb_pan_display = sm501fb_pan_crt, 1460 .fb_cursor = sm501fb_cursor, 1461 .fb_fillrect = sm501fb_fillrect, 1462 .fb_copyarea = sm501fb_copyarea, 1463 .fb_imageblit = cfb_imageblit, 1464 .fb_sync = sm501fb_sync, 1465}; 1466 1467static struct fb_ops sm501fb_ops_pnl = { 1468 .owner = THIS_MODULE, 1469 .fb_check_var = sm501fb_check_var_pnl, 1470 .fb_set_par = sm501fb_set_par_pnl, 1471 .fb_pan_display = sm501fb_pan_pnl, 1472 .fb_blank = sm501fb_blank_pnl, 1473 .fb_setcolreg = sm501fb_setcolreg, 1474 .fb_cursor = sm501fb_cursor, 1475 .fb_fillrect = sm501fb_fillrect, 1476 .fb_copyarea = sm501fb_copyarea, 1477 .fb_imageblit = cfb_imageblit, 1478 .fb_sync = sm501fb_sync, 1479}; 1480 1481/* sm501_init_cursor 1482 * 1483 * initialise hw cursor parameters 1484*/ 1485 1486static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base) 1487{ 1488 struct sm501fb_par *par; 1489 struct sm501fb_info *info; 1490 int ret; 1491 1492 if (fbi == NULL) 1493 return 0; 1494 1495 par = fbi->par; 1496 info = par->info; 1497 1498 par->cursor_regs = info->regs + reg_base; 1499 1500 ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024, 1501 fbi->fix.smem_len); 1502 if (ret < 0) 1503 return ret; 1504 1505 /* initialise the colour registers */ 1506 1507 smc501_writel(par->cursor.sm_addr, 1508 par->cursor_regs + SM501_OFF_HWC_ADDR); 1509 1510 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC); 1511 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2); 1512 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3); 1513 sm501fb_sync_regs(info); 1514 1515 return 0; 1516} 1517 1518/* sm501fb_info_start 1519 * 1520 * fills the par structure claiming resources and remapping etc. 1521*/ 1522 1523static int sm501fb_start(struct sm501fb_info *info, 1524 struct platform_device *pdev) 1525{ 1526 struct resource *res; 1527 struct device *dev = &pdev->dev; 1528 int k; 1529 int ret; 1530 1531 info->irq = ret = platform_get_irq(pdev, 0); 1532 if (ret < 0) { 1533 /* we currently do not use the IRQ */ 1534 dev_warn(dev, "no irq for device\n"); 1535 } 1536 1537 /* allocate, reserve and remap resources for display 1538 * controller registers */ 1539 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1540 if (res == NULL) { 1541 dev_err(dev, "no resource definition for registers\n"); 1542 ret = -ENOENT; 1543 goto err_release; 1544 } 1545 1546 info->regs_res = request_mem_region(res->start, 1547 resource_size(res), 1548 pdev->name); 1549 1550 if (info->regs_res == NULL) { 1551 dev_err(dev, "cannot claim registers\n"); 1552 ret = -ENXIO; 1553 goto err_release; 1554 } 1555 1556 info->regs = ioremap(res->start, resource_size(res)); 1557 if (info->regs == NULL) { 1558 dev_err(dev, "cannot remap registers\n"); 1559 ret = -ENXIO; 1560 goto err_regs_res; 1561 } 1562 1563 /* allocate, reserve and remap resources for 2d 1564 * controller registers */ 1565 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 1566 if (res == NULL) { 1567 dev_err(dev, "no resource definition for 2d registers\n"); 1568 ret = -ENOENT; 1569 goto err_regs_map; 1570 } 1571 1572 info->regs2d_res = request_mem_region(res->start, 1573 resource_size(res), 1574 pdev->name); 1575 1576 if (info->regs2d_res == NULL) { 1577 dev_err(dev, "cannot claim registers\n"); 1578 ret = -ENXIO; 1579 goto err_regs_map; 1580 } 1581 1582 info->regs2d = ioremap(res->start, resource_size(res)); 1583 if (info->regs2d == NULL) { 1584 dev_err(dev, "cannot remap registers\n"); 1585 ret = -ENXIO; 1586 goto err_regs2d_res; 1587 } 1588 1589 /* allocate, reserve resources for framebuffer */ 1590 res = platform_get_resource(pdev, IORESOURCE_MEM, 2); 1591 if (res == NULL) { 1592 dev_err(dev, "no memory resource defined\n"); 1593 ret = -ENXIO; 1594 goto err_regs2d_map; 1595 } 1596 1597 info->fbmem_res = request_mem_region(res->start, 1598 resource_size(res), 1599 pdev->name); 1600 if (info->fbmem_res == NULL) { 1601 dev_err(dev, "cannot claim framebuffer\n"); 1602 ret = -ENXIO; 1603 goto err_regs2d_map; 1604 } 1605 1606 info->fbmem = ioremap(res->start, resource_size(res)); 1607 if (info->fbmem == NULL) { 1608 dev_err(dev, "cannot remap framebuffer\n"); 1609 ret = -ENXIO; 1610 goto err_mem_res; 1611 } 1612 1613 info->fbmem_len = resource_size(res); 1614 1615 /* clear framebuffer memory - avoids garbage data on unused fb */ 1616 memset_io(info->fbmem, 0, info->fbmem_len); 1617 1618 /* clear palette ram - undefined at power on */ 1619 for (k = 0; k < (256 * 3); k++) 1620 smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4)); 1621 1622 /* enable display controller */ 1623 sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1); 1624 1625 /* enable 2d controller */ 1626 sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1); 1627 1628 /* setup cursors */ 1629 sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR); 1630 sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR); 1631 1632 return 0; /* everything is setup */ 1633 1634 err_mem_res: 1635 release_mem_region(info->fbmem_res->start, 1636 resource_size(info->fbmem_res)); 1637 1638 err_regs2d_map: 1639 iounmap(info->regs2d); 1640 1641 err_regs2d_res: 1642 release_mem_region(info->regs2d_res->start, 1643 resource_size(info->regs2d_res)); 1644 1645 err_regs_map: 1646 iounmap(info->regs); 1647 1648 err_regs_res: 1649 release_mem_region(info->regs_res->start, 1650 resource_size(info->regs_res)); 1651 1652 err_release: 1653 return ret; 1654} 1655 1656static void sm501fb_stop(struct sm501fb_info *info) 1657{ 1658 /* disable display controller */ 1659 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0); 1660 1661 iounmap(info->fbmem); 1662 release_mem_region(info->fbmem_res->start, 1663 resource_size(info->fbmem_res)); 1664 1665 iounmap(info->regs2d); 1666 release_mem_region(info->regs2d_res->start, 1667 resource_size(info->regs2d_res)); 1668 1669 iounmap(info->regs); 1670 release_mem_region(info->regs_res->start, 1671 resource_size(info->regs_res)); 1672} 1673 1674static int sm501fb_init_fb(struct fb_info *fb, enum sm501_controller head, 1675 const char *fbname) 1676{ 1677 struct sm501_platdata_fbsub *pd; 1678 struct sm501fb_par *par = fb->par; 1679 struct sm501fb_info *info = par->info; 1680 unsigned long ctrl; 1681 unsigned int enable; 1682 int ret; 1683 1684 switch (head) { 1685 case HEAD_CRT: 1686 pd = info->pdata->fb_crt; 1687 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL); 1688 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0; 1689 1690 /* ensure we set the correct source register */ 1691 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) { 1692 ctrl |= SM501_DC_CRT_CONTROL_SEL; 1693 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); 1694 } 1695 1696 break; 1697 1698 case HEAD_PANEL: 1699 pd = info->pdata->fb_pnl; 1700 ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL); 1701 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0; 1702 break; 1703 1704 default: 1705 pd = NULL; /* stop compiler warnings */ 1706 ctrl = 0; 1707 enable = 0; 1708 BUG(); 1709 } 1710 1711 dev_info(info->dev, "fb %s %sabled at start\n", 1712 fbname, enable ? "en" : "dis"); 1713 1714 /* check to see if our routing allows this */ 1715 1716 if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) { 1717 ctrl &= ~SM501_DC_CRT_CONTROL_SEL; 1718 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); 1719 enable = 0; 1720 } 1721 1722 strscpy(fb->fix.id, fbname, sizeof(fb->fix.id)); 1723 1724 memcpy(&par->ops, 1725 (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl, 1726 sizeof(struct fb_ops)); 1727 1728 /* update ops dependent on what we've been passed */ 1729 1730 if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0) 1731 par->ops.fb_cursor = NULL; 1732 1733 fb->fbops = &par->ops; 1734 fb->flags = FBINFO_READS_FAST | 1735 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT | 1736 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN; 1737 1738#if defined(CONFIG_OF) 1739#ifdef __BIG_ENDIAN 1740 if (of_property_read_bool(info->dev->parent->of_node, "little-endian")) 1741 fb->flags |= FBINFO_FOREIGN_ENDIAN; 1742#else 1743 if (of_property_read_bool(info->dev->parent->of_node, "big-endian")) 1744 fb->flags |= FBINFO_FOREIGN_ENDIAN; 1745#endif 1746#endif 1747 /* fixed data */ 1748 1749 fb->fix.type = FB_TYPE_PACKED_PIXELS; 1750 fb->fix.type_aux = 0; 1751 fb->fix.xpanstep = 1; 1752 fb->fix.ypanstep = 1; 1753 fb->fix.ywrapstep = 0; 1754 fb->fix.accel = FB_ACCEL_NONE; 1755 1756 /* screenmode */ 1757 1758 fb->var.nonstd = 0; 1759 fb->var.activate = FB_ACTIVATE_NOW; 1760 fb->var.accel_flags = 0; 1761 fb->var.vmode = FB_VMODE_NONINTERLACED; 1762 fb->var.bits_per_pixel = 16; 1763 1764 if (info->edid_data) { 1765 /* Now build modedb from EDID */ 1766 fb_edid_to_monspecs(info->edid_data, &fb->monspecs); 1767 fb_videomode_to_modelist(fb->monspecs.modedb, 1768 fb->monspecs.modedb_len, 1769 &fb->modelist); 1770 } 1771 1772 if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) { 1773 /* TODO read the mode from the current display */ 1774 } else { 1775 if (pd->def_mode) { 1776 dev_info(info->dev, "using supplied mode\n"); 1777 fb_videomode_to_var(&fb->var, pd->def_mode); 1778 1779 fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8; 1780 fb->var.xres_virtual = fb->var.xres; 1781 fb->var.yres_virtual = fb->var.yres; 1782 } else { 1783 if (info->edid_data) { 1784 ret = fb_find_mode(&fb->var, fb, fb_mode, 1785 fb->monspecs.modedb, 1786 fb->monspecs.modedb_len, 1787 &sm501_default_mode, default_bpp); 1788 /* edid_data is no longer needed, free it */ 1789 kfree(info->edid_data); 1790 } else { 1791 ret = fb_find_mode(&fb->var, fb, 1792 NULL, NULL, 0, NULL, 8); 1793 } 1794 1795 switch (ret) { 1796 case 1: 1797 dev_info(info->dev, "using mode specified in " 1798 "@mode\n"); 1799 break; 1800 case 2: 1801 dev_info(info->dev, "using mode specified in " 1802 "@mode with ignored refresh rate\n"); 1803 break; 1804 case 3: 1805 dev_info(info->dev, "using mode default " 1806 "mode\n"); 1807 break; 1808 case 4: 1809 dev_info(info->dev, "using mode from list\n"); 1810 break; 1811 default: 1812 dev_info(info->dev, "ret = %d\n", ret); 1813 dev_info(info->dev, "failed to find mode\n"); 1814 return -EINVAL; 1815 } 1816 } 1817 } 1818 1819 /* initialise and set the palette */ 1820 if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) { 1821 dev_err(info->dev, "failed to allocate cmap memory\n"); 1822 return -ENOMEM; 1823 } 1824 fb_set_cmap(&fb->cmap, fb); 1825 1826 ret = (fb->fbops->fb_check_var)(&fb->var, fb); 1827 if (ret) 1828 dev_err(info->dev, "check_var() failed on initial setup?\n"); 1829 1830 return 0; 1831} 1832 1833/* default platform data if none is supplied (ie, PCI device) */ 1834 1835static struct sm501_platdata_fbsub sm501fb_pdata_crt = { 1836 .flags = (SM501FB_FLAG_USE_INIT_MODE | 1837 SM501FB_FLAG_USE_HWCURSOR | 1838 SM501FB_FLAG_USE_HWACCEL | 1839 SM501FB_FLAG_DISABLE_AT_EXIT), 1840 1841}; 1842 1843static struct sm501_platdata_fbsub sm501fb_pdata_pnl = { 1844 .flags = (SM501FB_FLAG_USE_INIT_MODE | 1845 SM501FB_FLAG_USE_HWCURSOR | 1846 SM501FB_FLAG_USE_HWACCEL | 1847 SM501FB_FLAG_DISABLE_AT_EXIT), 1848}; 1849 1850static struct sm501_platdata_fb sm501fb_def_pdata = { 1851 .fb_route = SM501_FB_OWN, 1852 .fb_crt = &sm501fb_pdata_crt, 1853 .fb_pnl = &sm501fb_pdata_pnl, 1854}; 1855 1856static char driver_name_crt[] = "sm501fb-crt"; 1857static char driver_name_pnl[] = "sm501fb-panel"; 1858 1859static int sm501fb_probe_one(struct sm501fb_info *info, 1860 enum sm501_controller head) 1861{ 1862 unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel"; 1863 struct sm501_platdata_fbsub *pd; 1864 struct sm501fb_par *par; 1865 struct fb_info *fbi; 1866 1867 pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl; 1868 1869 /* Do not initialise if we've not been given any platform data */ 1870 if (pd == NULL) { 1871 dev_info(info->dev, "no data for fb %s (disabled)\n", name); 1872 return 0; 1873 } 1874 1875 fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev); 1876 if (!fbi) 1877 return -ENOMEM; 1878 1879 par = fbi->par; 1880 par->info = info; 1881 par->head = head; 1882 fbi->pseudo_palette = &par->pseudo_palette; 1883 1884 info->fb[head] = fbi; 1885 1886 return 0; 1887} 1888 1889/* Free up anything allocated by sm501fb_init_fb */ 1890 1891static void sm501_free_init_fb(struct sm501fb_info *info, 1892 enum sm501_controller head) 1893{ 1894 struct fb_info *fbi = info->fb[head]; 1895 1896 if (!fbi) 1897 return; 1898 1899 fb_dealloc_cmap(&fbi->cmap); 1900} 1901 1902static int sm501fb_start_one(struct sm501fb_info *info, 1903 enum sm501_controller head, const char *drvname) 1904{ 1905 struct fb_info *fbi = info->fb[head]; 1906 int ret; 1907 1908 if (!fbi) 1909 return 0; 1910 1911 mutex_init(&info->fb[head]->mm_lock); 1912 1913 ret = sm501fb_init_fb(info->fb[head], head, drvname); 1914 if (ret) { 1915 dev_err(info->dev, "cannot initialise fb %s\n", drvname); 1916 return ret; 1917 } 1918 1919 ret = register_framebuffer(info->fb[head]); 1920 if (ret) { 1921 dev_err(info->dev, "failed to register fb %s\n", drvname); 1922 sm501_free_init_fb(info, head); 1923 return ret; 1924 } 1925 1926 dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id); 1927 1928 return 0; 1929} 1930 1931static int sm501fb_probe(struct platform_device *pdev) 1932{ 1933 struct sm501fb_info *info; 1934 struct device *dev = &pdev->dev; 1935 int ret; 1936 1937 /* allocate our framebuffers */ 1938 info = kzalloc(sizeof(*info), GFP_KERNEL); 1939 if (!info) { 1940 dev_err(dev, "failed to allocate state\n"); 1941 return -ENOMEM; 1942 } 1943 1944 info->dev = dev = &pdev->dev; 1945 platform_set_drvdata(pdev, info); 1946 1947 if (dev->parent->platform_data) { 1948 struct sm501_platdata *pd = dev->parent->platform_data; 1949 info->pdata = pd->fb; 1950 } 1951 1952 if (info->pdata == NULL) { 1953 int found = 0; 1954#if defined(CONFIG_OF) 1955 struct device_node *np = pdev->dev.parent->of_node; 1956 const u8 *prop; 1957 const char *cp; 1958 int len; 1959 1960 info->pdata = &sm501fb_def_pdata; 1961 if (np) { 1962 /* Get EDID */ 1963 cp = of_get_property(np, "mode", &len); 1964 if (cp) 1965 strcpy(fb_mode, cp); 1966 prop = of_get_property(np, "edid", &len); 1967 if (prop && len == EDID_LENGTH) { 1968 info->edid_data = kmemdup(prop, EDID_LENGTH, 1969 GFP_KERNEL); 1970 if (info->edid_data) 1971 found = 1; 1972 } 1973 } 1974#endif 1975 if (!found) { 1976 dev_info(dev, "using default configuration data\n"); 1977 info->pdata = &sm501fb_def_pdata; 1978 } 1979 } 1980 1981 /* probe for the presence of each panel */ 1982 1983 ret = sm501fb_probe_one(info, HEAD_CRT); 1984 if (ret < 0) { 1985 dev_err(dev, "failed to probe CRT\n"); 1986 goto err_alloc; 1987 } 1988 1989 ret = sm501fb_probe_one(info, HEAD_PANEL); 1990 if (ret < 0) { 1991 dev_err(dev, "failed to probe PANEL\n"); 1992 goto err_probed_crt; 1993 } 1994 1995 if (info->fb[HEAD_PANEL] == NULL && 1996 info->fb[HEAD_CRT] == NULL) { 1997 dev_err(dev, "no framebuffers found\n"); 1998 ret = -ENODEV; 1999 goto err_alloc; 2000 } 2001 2002 /* get the resources for both of the framebuffers */ 2003 2004 ret = sm501fb_start(info, pdev); 2005 if (ret) { 2006 dev_err(dev, "cannot initialise SM501\n"); 2007 goto err_probed_panel; 2008 } 2009 2010 ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt); 2011 if (ret) { 2012 dev_err(dev, "failed to start CRT\n"); 2013 goto err_started; 2014 } 2015 2016 ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl); 2017 if (ret) { 2018 dev_err(dev, "failed to start Panel\n"); 2019 goto err_started_crt; 2020 } 2021 2022 /* we registered, return ok */ 2023 return 0; 2024 2025err_started_crt: 2026 unregister_framebuffer(info->fb[HEAD_CRT]); 2027 sm501_free_init_fb(info, HEAD_CRT); 2028 2029err_started: 2030 sm501fb_stop(info); 2031 2032err_probed_panel: 2033 framebuffer_release(info->fb[HEAD_PANEL]); 2034 2035err_probed_crt: 2036 framebuffer_release(info->fb[HEAD_CRT]); 2037 2038err_alloc: 2039 kfree(info); 2040 2041 return ret; 2042} 2043 2044 2045/* 2046 * Cleanup 2047 */ 2048static void sm501fb_remove(struct platform_device *pdev) 2049{ 2050 struct sm501fb_info *info = platform_get_drvdata(pdev); 2051 struct fb_info *fbinfo_crt = info->fb[0]; 2052 struct fb_info *fbinfo_pnl = info->fb[1]; 2053 2054 sm501_free_init_fb(info, HEAD_CRT); 2055 sm501_free_init_fb(info, HEAD_PANEL); 2056 2057 if (fbinfo_crt) 2058 unregister_framebuffer(fbinfo_crt); 2059 if (fbinfo_pnl) 2060 unregister_framebuffer(fbinfo_pnl); 2061 2062 sm501fb_stop(info); 2063 kfree(info); 2064 2065 framebuffer_release(fbinfo_pnl); 2066 framebuffer_release(fbinfo_crt); 2067} 2068 2069#ifdef CONFIG_PM 2070 2071static int sm501fb_suspend_fb(struct sm501fb_info *info, 2072 enum sm501_controller head) 2073{ 2074 struct fb_info *fbi = info->fb[head]; 2075 struct sm501fb_par *par; 2076 2077 if (!fbi) 2078 return 0; 2079 2080 par = fbi->par; 2081 if (par->screen.size == 0) 2082 return 0; 2083 2084 /* blank the relevant interface to ensure unit power minimised */ 2085 (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi); 2086 2087 /* tell console/fb driver we are suspending */ 2088 2089 console_lock(); 2090 fb_set_suspend(fbi, 1); 2091 console_unlock(); 2092 2093 /* backup copies in case chip is powered down over suspend */ 2094 2095 par->store_fb = vmalloc(par->screen.size); 2096 if (par->store_fb == NULL) { 2097 dev_err(info->dev, "no memory to store screen\n"); 2098 return -ENOMEM; 2099 } 2100 2101 par->store_cursor = vmalloc(par->cursor.size); 2102 if (par->store_cursor == NULL) { 2103 dev_err(info->dev, "no memory to store cursor\n"); 2104 goto err_nocursor; 2105 } 2106 2107 dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb); 2108 dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor); 2109 2110 memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size); 2111 memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size); 2112 2113 return 0; 2114 2115 err_nocursor: 2116 vfree(par->store_fb); 2117 par->store_fb = NULL; 2118 2119 return -ENOMEM; 2120} 2121 2122static void sm501fb_resume_fb(struct sm501fb_info *info, 2123 enum sm501_controller head) 2124{ 2125 struct fb_info *fbi = info->fb[head]; 2126 struct sm501fb_par *par; 2127 2128 if (!fbi) 2129 return; 2130 2131 par = fbi->par; 2132 if (par->screen.size == 0) 2133 return; 2134 2135 /* re-activate the configuration */ 2136 2137 (par->ops.fb_set_par)(fbi); 2138 2139 /* restore the data */ 2140 2141 dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb); 2142 dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor); 2143 2144 if (par->store_fb) 2145 memcpy_toio(par->screen.k_addr, par->store_fb, 2146 par->screen.size); 2147 2148 if (par->store_cursor) 2149 memcpy_toio(par->cursor.k_addr, par->store_cursor, 2150 par->cursor.size); 2151 2152 console_lock(); 2153 fb_set_suspend(fbi, 0); 2154 console_unlock(); 2155 2156 vfree(par->store_fb); 2157 vfree(par->store_cursor); 2158} 2159 2160 2161/* suspend and resume support */ 2162 2163static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state) 2164{ 2165 struct sm501fb_info *info = platform_get_drvdata(pdev); 2166 2167 /* store crt control to resume with */ 2168 info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL); 2169 2170 sm501fb_suspend_fb(info, HEAD_CRT); 2171 sm501fb_suspend_fb(info, HEAD_PANEL); 2172 2173 /* turn off the clocks, in case the device is not powered down */ 2174 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0); 2175 2176 return 0; 2177} 2178 2179#define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP | \ 2180 SM501_DC_CRT_CONTROL_SEL) 2181 2182 2183static int sm501fb_resume(struct platform_device *pdev) 2184{ 2185 struct sm501fb_info *info = platform_get_drvdata(pdev); 2186 unsigned long crt_ctrl; 2187 2188 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1); 2189 2190 /* restore the items we want to be saved for crt control */ 2191 2192 crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL); 2193 crt_ctrl &= ~SM501_CRT_CTRL_SAVE; 2194 crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE; 2195 smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL); 2196 2197 sm501fb_resume_fb(info, HEAD_CRT); 2198 sm501fb_resume_fb(info, HEAD_PANEL); 2199 2200 return 0; 2201} 2202 2203#else 2204#define sm501fb_suspend NULL 2205#define sm501fb_resume NULL 2206#endif 2207 2208static struct platform_driver sm501fb_driver = { 2209 .probe = sm501fb_probe, 2210 .remove_new = sm501fb_remove, 2211 .suspend = sm501fb_suspend, 2212 .resume = sm501fb_resume, 2213 .driver = { 2214 .name = "sm501-fb", 2215 .dev_groups = sm501fb_groups, 2216 }, 2217}; 2218 2219module_platform_driver(sm501fb_driver); 2220 2221module_param_named(mode, fb_mode, charp, 0); 2222MODULE_PARM_DESC(mode, 2223 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" "); 2224module_param_named(bpp, default_bpp, ulong, 0); 2225MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode"); 2226MODULE_AUTHOR("Ben Dooks, Vincent Sanders"); 2227MODULE_DESCRIPTION("SM501 Framebuffer driver"); 2228MODULE_LICENSE("GPL v2"); 2229