1 /* linux/drivers/video/s3c-fb.c 2 * 3 * Copyright 2008 Openmoko Inc. 4 * Copyright 2008-2010 Simtec Electronics 5 * Ben Dooks <ben@simtec.co.uk> 6 * http://armlinux.simtec.co.uk/ 7 * 8 * Samsung SoC Framebuffer driver 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software FoundatIon. 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/platform_device.h> 18 #include <linux/dma-mapping.h> 19 #include <linux/slab.h> 20 #include <linux/init.h> 21 #include <linux/clk.h> 22 #include <linux/fb.h> 23 #include <linux/io.h> 24 #include <linux/uaccess.h> 25 #include <linux/interrupt.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/platform_data/video_s3c.h> 28 29 #include <video/samsung_fimd.h> 30 31 /* This driver will export a number of framebuffer interfaces depending 32 * on the configuration passed in via the platform data. Each fb instance 33 * maps to a hardware window. Currently there is no support for runtime 34 * setting of the alpha-blending functions that each window has, so only 35 * window 0 is actually useful. 36 * 37 * Window 0 is treated specially, it is used for the basis of the LCD 38 * output timings and as the control for the output power-down state. 39 */ 40 41 /* note, the previous use of <mach/regs-fb.h> to get platform specific data 42 * has been replaced by using the platform device name to pick the correct 43 * configuration data for the system. 44 */ 45 46 #ifdef CONFIG_FB_S3C_DEBUG_REGWRITE 47 #undef writel 48 #define writel(v, r) do { \ 49 pr_debug("%s: %08x => %p\n", __func__, (unsigned int)v, r); \ 50 __raw_writel(v, r); \ 51 } while (0) 52 #endif /* FB_S3C_DEBUG_REGWRITE */ 53 54 /* irq_flags bits */ 55 #define S3C_FB_VSYNC_IRQ_EN 0 56 57 #define VSYNC_TIMEOUT_MSEC 50 58 59 struct s3c_fb; 60 61 #define VALID_BPP(x) (1 << ((x) - 1)) 62 63 #define OSD_BASE(win, variant) ((variant).osd + ((win) * (variant).osd_stride)) 64 #define VIDOSD_A(win, variant) (OSD_BASE(win, variant) + 0x00) 65 #define VIDOSD_B(win, variant) (OSD_BASE(win, variant) + 0x04) 66 #define VIDOSD_C(win, variant) (OSD_BASE(win, variant) + 0x08) 67 #define VIDOSD_D(win, variant) (OSD_BASE(win, variant) + 0x0C) 68 69 /** 70 * struct s3c_fb_variant - fb variant information 71 * @is_2443: Set if S3C2443/S3C2416 style hardware. 72 * @nr_windows: The number of windows. 73 * @vidtcon: The base for the VIDTCONx registers 74 * @wincon: The base for the WINxCON registers. 75 * @winmap: The base for the WINxMAP registers. 76 * @keycon: The abse for the WxKEYCON registers. 77 * @buf_start: Offset of buffer start registers. 78 * @buf_size: Offset of buffer size registers. 79 * @buf_end: Offset of buffer end registers. 80 * @osd: The base for the OSD registers. 81 * @palette: Address of palette memory, or 0 if none. 82 * @has_prtcon: Set if has PRTCON register. 83 * @has_shadowcon: Set if has SHADOWCON register. 84 * @has_blendcon: Set if has BLENDCON register. 85 * @has_clksel: Set if VIDCON0 register has CLKSEL bit. 86 * @has_fixvclk: Set if VIDCON1 register has FIXVCLK bits. 87 */ 88 struct s3c_fb_variant { 89 unsigned int is_2443:1; 90 unsigned short nr_windows; 91 unsigned int vidtcon; 92 unsigned short wincon; 93 unsigned short winmap; 94 unsigned short keycon; 95 unsigned short buf_start; 96 unsigned short buf_end; 97 unsigned short buf_size; 98 unsigned short osd; 99 unsigned short osd_stride; 100 unsigned short palette[S3C_FB_MAX_WIN]; 101 102 unsigned int has_prtcon:1; 103 unsigned int has_shadowcon:1; 104 unsigned int has_blendcon:1; 105 unsigned int has_clksel:1; 106 unsigned int has_fixvclk:1; 107 }; 108 109 /** 110 * struct s3c_fb_win_variant 111 * @has_osd_c: Set if has OSD C register. 112 * @has_osd_d: Set if has OSD D register. 113 * @has_osd_alpha: Set if can change alpha transparency for a window. 114 * @palette_sz: Size of palette in entries. 115 * @palette_16bpp: Set if palette is 16bits wide. 116 * @osd_size_off: If != 0, supports setting up OSD for a window; the appropriate 117 * register is located at the given offset from OSD_BASE. 118 * @valid_bpp: 1 bit per BPP setting to show valid bits-per-pixel. 119 * 120 * valid_bpp bit x is set if (x+1)BPP is supported. 121 */ 122 struct s3c_fb_win_variant { 123 unsigned int has_osd_c:1; 124 unsigned int has_osd_d:1; 125 unsigned int has_osd_alpha:1; 126 unsigned int palette_16bpp:1; 127 unsigned short osd_size_off; 128 unsigned short palette_sz; 129 u32 valid_bpp; 130 }; 131 132 /** 133 * struct s3c_fb_driverdata - per-device type driver data for init time. 134 * @variant: The variant information for this driver. 135 * @win: The window information for each window. 136 */ 137 struct s3c_fb_driverdata { 138 struct s3c_fb_variant variant; 139 struct s3c_fb_win_variant *win[S3C_FB_MAX_WIN]; 140 }; 141 142 /** 143 * struct s3c_fb_palette - palette information 144 * @r: Red bitfield. 145 * @g: Green bitfield. 146 * @b: Blue bitfield. 147 * @a: Alpha bitfield. 148 */ 149 struct s3c_fb_palette { 150 struct fb_bitfield r; 151 struct fb_bitfield g; 152 struct fb_bitfield b; 153 struct fb_bitfield a; 154 }; 155 156 /** 157 * struct s3c_fb_win - per window private data for each framebuffer. 158 * @windata: The platform data supplied for the window configuration. 159 * @parent: The hardware that this window is part of. 160 * @fbinfo: Pointer pack to the framebuffer info for this window. 161 * @varint: The variant information for this window. 162 * @palette_buffer: Buffer/cache to hold palette entries. 163 * @pseudo_palette: For use in TRUECOLOUR modes for entries 0..15/ 164 * @index: The window number of this window. 165 * @palette: The bitfields for changing r/g/b into a hardware palette entry. 166 */ 167 struct s3c_fb_win { 168 struct s3c_fb_pd_win *windata; 169 struct s3c_fb *parent; 170 struct fb_info *fbinfo; 171 struct s3c_fb_palette palette; 172 struct s3c_fb_win_variant variant; 173 174 u32 *palette_buffer; 175 u32 pseudo_palette[16]; 176 unsigned int index; 177 }; 178 179 /** 180 * struct s3c_fb_vsync - vsync information 181 * @wait: a queue for processes waiting for vsync 182 * @count: vsync interrupt count 183 */ 184 struct s3c_fb_vsync { 185 wait_queue_head_t wait; 186 unsigned int count; 187 }; 188 189 /** 190 * struct s3c_fb - overall hardware state of the hardware 191 * @slock: The spinlock protection for this data structure. 192 * @dev: The device that we bound to, for printing, etc. 193 * @bus_clk: The clk (hclk) feeding our interface and possibly pixclk. 194 * @lcd_clk: The clk (sclk) feeding pixclk. 195 * @regs: The mapped hardware registers. 196 * @variant: Variant information for this hardware. 197 * @enabled: A bitmask of enabled hardware windows. 198 * @output_on: Flag if the physical output is enabled. 199 * @pdata: The platform configuration data passed with the device. 200 * @windows: The hardware windows that have been claimed. 201 * @irq_no: IRQ line number 202 * @irq_flags: irq flags 203 * @vsync_info: VSYNC-related information (count, queues...) 204 */ 205 struct s3c_fb { 206 spinlock_t slock; 207 struct device *dev; 208 struct clk *bus_clk; 209 struct clk *lcd_clk; 210 void __iomem *regs; 211 struct s3c_fb_variant variant; 212 213 unsigned char enabled; 214 bool output_on; 215 216 struct s3c_fb_platdata *pdata; 217 struct s3c_fb_win *windows[S3C_FB_MAX_WIN]; 218 219 int irq_no; 220 unsigned long irq_flags; 221 struct s3c_fb_vsync vsync_info; 222 }; 223 224 /** 225 * s3c_fb_validate_win_bpp - validate the bits-per-pixel for this mode. 226 * @win: The device window. 227 * @bpp: The bit depth. 228 */ 229 static bool s3c_fb_validate_win_bpp(struct s3c_fb_win *win, unsigned int bpp) 230 { 231 return win->variant.valid_bpp & VALID_BPP(bpp); 232 } 233 234 /** 235 * s3c_fb_check_var() - framebuffer layer request to verify a given mode. 236 * @var: The screen information to verify. 237 * @info: The framebuffer device. 238 * 239 * Framebuffer layer call to verify the given information and allow us to 240 * update various information depending on the hardware capabilities. 241 */ 242 static int s3c_fb_check_var(struct fb_var_screeninfo *var, 243 struct fb_info *info) 244 { 245 struct s3c_fb_win *win = info->par; 246 struct s3c_fb *sfb = win->parent; 247 248 dev_dbg(sfb->dev, "checking parameters\n"); 249 250 var->xres_virtual = max(var->xres_virtual, var->xres); 251 var->yres_virtual = max(var->yres_virtual, var->yres); 252 253 if (!s3c_fb_validate_win_bpp(win, var->bits_per_pixel)) { 254 dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n", 255 win->index, var->bits_per_pixel); 256 return -EINVAL; 257 } 258 259 /* always ensure these are zero, for drop through cases below */ 260 var->transp.offset = 0; 261 var->transp.length = 0; 262 263 switch (var->bits_per_pixel) { 264 case 1: 265 case 2: 266 case 4: 267 case 8: 268 if (sfb->variant.palette[win->index] != 0) { 269 /* non palletised, A:1,R:2,G:3,B:2 mode */ 270 var->red.offset = 5; 271 var->green.offset = 2; 272 var->blue.offset = 0; 273 var->red.length = 2; 274 var->green.length = 3; 275 var->blue.length = 2; 276 var->transp.offset = 7; 277 var->transp.length = 1; 278 } else { 279 var->red.offset = 0; 280 var->red.length = var->bits_per_pixel; 281 var->green = var->red; 282 var->blue = var->red; 283 } 284 break; 285 286 case 19: 287 /* 666 with one bit alpha/transparency */ 288 var->transp.offset = 18; 289 var->transp.length = 1; 290 /* drop through */ 291 case 18: 292 var->bits_per_pixel = 32; 293 294 /* 666 format */ 295 var->red.offset = 12; 296 var->green.offset = 6; 297 var->blue.offset = 0; 298 var->red.length = 6; 299 var->green.length = 6; 300 var->blue.length = 6; 301 break; 302 303 case 16: 304 /* 16 bpp, 565 format */ 305 var->red.offset = 11; 306 var->green.offset = 5; 307 var->blue.offset = 0; 308 var->red.length = 5; 309 var->green.length = 6; 310 var->blue.length = 5; 311 break; 312 313 case 32: 314 case 28: 315 case 25: 316 var->transp.length = var->bits_per_pixel - 24; 317 var->transp.offset = 24; 318 /* drop through */ 319 case 24: 320 /* our 24bpp is unpacked, so 32bpp */ 321 var->bits_per_pixel = 32; 322 var->red.offset = 16; 323 var->red.length = 8; 324 var->green.offset = 8; 325 var->green.length = 8; 326 var->blue.offset = 0; 327 var->blue.length = 8; 328 break; 329 330 default: 331 dev_err(sfb->dev, "invalid bpp\n"); 332 return -EINVAL; 333 } 334 335 dev_dbg(sfb->dev, "%s: verified parameters\n", __func__); 336 return 0; 337 } 338 339 /** 340 * s3c_fb_calc_pixclk() - calculate the divider to create the pixel clock. 341 * @sfb: The hardware state. 342 * @pixclock: The pixel clock wanted, in picoseconds. 343 * 344 * Given the specified pixel clock, work out the necessary divider to get 345 * close to the output frequency. 346 */ 347 static int s3c_fb_calc_pixclk(struct s3c_fb *sfb, unsigned int pixclk) 348 { 349 unsigned long clk; 350 unsigned long long tmp; 351 unsigned int result; 352 353 if (sfb->variant.has_clksel) 354 clk = clk_get_rate(sfb->bus_clk); 355 else 356 clk = clk_get_rate(sfb->lcd_clk); 357 358 tmp = (unsigned long long)clk; 359 tmp *= pixclk; 360 361 do_div(tmp, 1000000000UL); 362 result = (unsigned int)tmp / 1000; 363 364 dev_dbg(sfb->dev, "pixclk=%u, clk=%lu, div=%d (%lu)\n", 365 pixclk, clk, result, result ? clk / result : clk); 366 367 return result; 368 } 369 370 /** 371 * s3c_fb_align_word() - align pixel count to word boundary 372 * @bpp: The number of bits per pixel 373 * @pix: The value to be aligned. 374 * 375 * Align the given pixel count so that it will start on an 32bit word 376 * boundary. 377 */ 378 static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) 379 { 380 int pix_per_word; 381 382 if (bpp > 16) 383 return pix; 384 385 pix_per_word = (8 * 32) / bpp; 386 return ALIGN(pix, pix_per_word); 387 } 388 389 /** 390 * vidosd_set_size() - set OSD size for a window 391 * 392 * @win: the window to set OSD size for 393 * @size: OSD size register value 394 */ 395 static void vidosd_set_size(struct s3c_fb_win *win, u32 size) 396 { 397 struct s3c_fb *sfb = win->parent; 398 399 /* OSD can be set up if osd_size_off != 0 for this window */ 400 if (win->variant.osd_size_off) 401 writel(size, sfb->regs + OSD_BASE(win->index, sfb->variant) 402 + win->variant.osd_size_off); 403 } 404 405 /** 406 * vidosd_set_alpha() - set alpha transparency for a window 407 * 408 * @win: the window to set OSD size for 409 * @alpha: alpha register value 410 */ 411 static void vidosd_set_alpha(struct s3c_fb_win *win, u32 alpha) 412 { 413 struct s3c_fb *sfb = win->parent; 414 415 if (win->variant.has_osd_alpha) 416 writel(alpha, sfb->regs + VIDOSD_C(win->index, sfb->variant)); 417 } 418 419 /** 420 * shadow_protect_win() - disable updating values from shadow registers at vsync 421 * 422 * @win: window to protect registers for 423 * @protect: 1 to protect (disable updates) 424 */ 425 static void shadow_protect_win(struct s3c_fb_win *win, bool protect) 426 { 427 struct s3c_fb *sfb = win->parent; 428 u32 reg; 429 430 if (protect) { 431 if (sfb->variant.has_prtcon) { 432 writel(PRTCON_PROTECT, sfb->regs + PRTCON); 433 } else if (sfb->variant.has_shadowcon) { 434 reg = readl(sfb->regs + SHADOWCON); 435 writel(reg | SHADOWCON_WINx_PROTECT(win->index), 436 sfb->regs + SHADOWCON); 437 } 438 } else { 439 if (sfb->variant.has_prtcon) { 440 writel(0, sfb->regs + PRTCON); 441 } else if (sfb->variant.has_shadowcon) { 442 reg = readl(sfb->regs + SHADOWCON); 443 writel(reg & ~SHADOWCON_WINx_PROTECT(win->index), 444 sfb->regs + SHADOWCON); 445 } 446 } 447 } 448 449 /** 450 * s3c_fb_enable() - Set the state of the main LCD output 451 * @sfb: The main framebuffer state. 452 * @enable: The state to set. 453 */ 454 static void s3c_fb_enable(struct s3c_fb *sfb, int enable) 455 { 456 u32 vidcon0 = readl(sfb->regs + VIDCON0); 457 458 if (enable && !sfb->output_on) 459 pm_runtime_get_sync(sfb->dev); 460 461 if (enable) { 462 vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F; 463 } else { 464 /* see the note in the framebuffer datasheet about 465 * why you cannot take both of these bits down at the 466 * same time. */ 467 468 if (vidcon0 & VIDCON0_ENVID) { 469 vidcon0 |= VIDCON0_ENVID; 470 vidcon0 &= ~VIDCON0_ENVID_F; 471 } 472 } 473 474 writel(vidcon0, sfb->regs + VIDCON0); 475 476 if (!enable && sfb->output_on) 477 pm_runtime_put_sync(sfb->dev); 478 479 sfb->output_on = enable; 480 } 481 482 /** 483 * s3c_fb_set_par() - framebuffer request to set new framebuffer state. 484 * @info: The framebuffer to change. 485 * 486 * Framebuffer layer request to set a new mode for the specified framebuffer 487 */ 488 static int s3c_fb_set_par(struct fb_info *info) 489 { 490 struct fb_var_screeninfo *var = &info->var; 491 struct s3c_fb_win *win = info->par; 492 struct s3c_fb *sfb = win->parent; 493 void __iomem *regs = sfb->regs; 494 void __iomem *buf = regs; 495 int win_no = win->index; 496 u32 alpha = 0; 497 u32 data; 498 u32 pagewidth; 499 500 dev_dbg(sfb->dev, "setting framebuffer parameters\n"); 501 502 pm_runtime_get_sync(sfb->dev); 503 504 shadow_protect_win(win, 1); 505 506 switch (var->bits_per_pixel) { 507 case 32: 508 case 24: 509 case 16: 510 case 12: 511 info->fix.visual = FB_VISUAL_TRUECOLOR; 512 break; 513 case 8: 514 if (win->variant.palette_sz >= 256) 515 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 516 else 517 info->fix.visual = FB_VISUAL_TRUECOLOR; 518 break; 519 case 1: 520 info->fix.visual = FB_VISUAL_MONO01; 521 break; 522 default: 523 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 524 break; 525 } 526 527 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; 528 529 info->fix.xpanstep = info->var.xres_virtual > info->var.xres ? 1 : 0; 530 info->fix.ypanstep = info->var.yres_virtual > info->var.yres ? 1 : 0; 531 532 /* disable the window whilst we update it */ 533 writel(0, regs + WINCON(win_no)); 534 535 if (!sfb->output_on) 536 s3c_fb_enable(sfb, 1); 537 538 /* write the buffer address */ 539 540 /* start and end registers stride is 8 */ 541 buf = regs + win_no * 8; 542 543 writel(info->fix.smem_start, buf + sfb->variant.buf_start); 544 545 data = info->fix.smem_start + info->fix.line_length * var->yres; 546 writel(data, buf + sfb->variant.buf_end); 547 548 pagewidth = (var->xres * var->bits_per_pixel) >> 3; 549 data = VIDW_BUF_SIZE_OFFSET(info->fix.line_length - pagewidth) | 550 VIDW_BUF_SIZE_PAGEWIDTH(pagewidth) | 551 VIDW_BUF_SIZE_OFFSET_E(info->fix.line_length - pagewidth) | 552 VIDW_BUF_SIZE_PAGEWIDTH_E(pagewidth); 553 writel(data, regs + sfb->variant.buf_size + (win_no * 4)); 554 555 /* write 'OSD' registers to control position of framebuffer */ 556 557 data = VIDOSDxA_TOPLEFT_X(0) | VIDOSDxA_TOPLEFT_Y(0) | 558 VIDOSDxA_TOPLEFT_X_E(0) | VIDOSDxA_TOPLEFT_Y_E(0); 559 writel(data, regs + VIDOSD_A(win_no, sfb->variant)); 560 561 data = VIDOSDxB_BOTRIGHT_X(s3c_fb_align_word(var->bits_per_pixel, 562 var->xres - 1)) | 563 VIDOSDxB_BOTRIGHT_Y(var->yres - 1) | 564 VIDOSDxB_BOTRIGHT_X_E(s3c_fb_align_word(var->bits_per_pixel, 565 var->xres - 1)) | 566 VIDOSDxB_BOTRIGHT_Y_E(var->yres - 1); 567 568 writel(data, regs + VIDOSD_B(win_no, sfb->variant)); 569 570 data = var->xres * var->yres; 571 572 alpha = VIDISD14C_ALPHA1_R(0xf) | 573 VIDISD14C_ALPHA1_G(0xf) | 574 VIDISD14C_ALPHA1_B(0xf); 575 576 vidosd_set_alpha(win, alpha); 577 vidosd_set_size(win, data); 578 579 /* Enable DMA channel for this window */ 580 if (sfb->variant.has_shadowcon) { 581 data = readl(sfb->regs + SHADOWCON); 582 data |= SHADOWCON_CHx_ENABLE(win_no); 583 writel(data, sfb->regs + SHADOWCON); 584 } 585 586 data = WINCONx_ENWIN; 587 sfb->enabled |= (1 << win->index); 588 589 /* note, since we have to round up the bits-per-pixel, we end up 590 * relying on the bitfield information for r/g/b/a to work out 591 * exactly which mode of operation is intended. */ 592 593 switch (var->bits_per_pixel) { 594 case 1: 595 data |= WINCON0_BPPMODE_1BPP; 596 data |= WINCONx_BITSWP; 597 data |= WINCONx_BURSTLEN_4WORD; 598 break; 599 case 2: 600 data |= WINCON0_BPPMODE_2BPP; 601 data |= WINCONx_BITSWP; 602 data |= WINCONx_BURSTLEN_8WORD; 603 break; 604 case 4: 605 data |= WINCON0_BPPMODE_4BPP; 606 data |= WINCONx_BITSWP; 607 data |= WINCONx_BURSTLEN_8WORD; 608 break; 609 case 8: 610 if (var->transp.length != 0) 611 data |= WINCON1_BPPMODE_8BPP_1232; 612 else 613 data |= WINCON0_BPPMODE_8BPP_PALETTE; 614 data |= WINCONx_BURSTLEN_8WORD; 615 data |= WINCONx_BYTSWP; 616 break; 617 case 16: 618 if (var->transp.length != 0) 619 data |= WINCON1_BPPMODE_16BPP_A1555; 620 else 621 data |= WINCON0_BPPMODE_16BPP_565; 622 data |= WINCONx_HAWSWP; 623 data |= WINCONx_BURSTLEN_16WORD; 624 break; 625 case 24: 626 case 32: 627 if (var->red.length == 6) { 628 if (var->transp.length != 0) 629 data |= WINCON1_BPPMODE_19BPP_A1666; 630 else 631 data |= WINCON1_BPPMODE_18BPP_666; 632 } else if (var->transp.length == 1) 633 data |= WINCON1_BPPMODE_25BPP_A1888 634 | WINCON1_BLD_PIX; 635 else if ((var->transp.length == 4) || 636 (var->transp.length == 8)) 637 data |= WINCON1_BPPMODE_28BPP_A4888 638 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; 639 else 640 data |= WINCON0_BPPMODE_24BPP_888; 641 642 data |= WINCONx_WSWP; 643 data |= WINCONx_BURSTLEN_16WORD; 644 break; 645 } 646 647 /* Enable the colour keying for the window below this one */ 648 if (win_no > 0) { 649 u32 keycon0_data = 0, keycon1_data = 0; 650 void __iomem *keycon = regs + sfb->variant.keycon; 651 652 keycon0_data = ~(WxKEYCON0_KEYBL_EN | 653 WxKEYCON0_KEYEN_F | 654 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0); 655 656 keycon1_data = WxKEYCON1_COLVAL(0xffffff); 657 658 keycon += (win_no - 1) * 8; 659 660 writel(keycon0_data, keycon + WKEYCON0); 661 writel(keycon1_data, keycon + WKEYCON1); 662 } 663 664 writel(data, regs + sfb->variant.wincon + (win_no * 4)); 665 writel(0x0, regs + sfb->variant.winmap + (win_no * 4)); 666 667 /* Set alpha value width */ 668 if (sfb->variant.has_blendcon) { 669 data = readl(sfb->regs + BLENDCON); 670 data &= ~BLENDCON_NEW_MASK; 671 if (var->transp.length > 4) 672 data |= BLENDCON_NEW_8BIT_ALPHA_VALUE; 673 else 674 data |= BLENDCON_NEW_4BIT_ALPHA_VALUE; 675 writel(data, sfb->regs + BLENDCON); 676 } 677 678 shadow_protect_win(win, 0); 679 680 pm_runtime_put_sync(sfb->dev); 681 682 return 0; 683 } 684 685 /** 686 * s3c_fb_update_palette() - set or schedule a palette update. 687 * @sfb: The hardware information. 688 * @win: The window being updated. 689 * @reg: The palette index being changed. 690 * @value: The computed palette value. 691 * 692 * Change the value of a palette register, either by directly writing to 693 * the palette (this requires the palette RAM to be disconnected from the 694 * hardware whilst this is in progress) or schedule the update for later. 695 * 696 * At the moment, since we have no VSYNC interrupt support, we simply set 697 * the palette entry directly. 698 */ 699 static void s3c_fb_update_palette(struct s3c_fb *sfb, 700 struct s3c_fb_win *win, 701 unsigned int reg, 702 u32 value) 703 { 704 void __iomem *palreg; 705 u32 palcon; 706 707 palreg = sfb->regs + sfb->variant.palette[win->index]; 708 709 dev_dbg(sfb->dev, "%s: win %d, reg %d (%p): %08x\n", 710 __func__, win->index, reg, palreg, value); 711 712 win->palette_buffer[reg] = value; 713 714 palcon = readl(sfb->regs + WPALCON); 715 writel(palcon | WPALCON_PAL_UPDATE, sfb->regs + WPALCON); 716 717 if (win->variant.palette_16bpp) 718 writew(value, palreg + (reg * 2)); 719 else 720 writel(value, palreg + (reg * 4)); 721 722 writel(palcon, sfb->regs + WPALCON); 723 } 724 725 static inline unsigned int chan_to_field(unsigned int chan, 726 struct fb_bitfield *bf) 727 { 728 chan &= 0xffff; 729 chan >>= 16 - bf->length; 730 return chan << bf->offset; 731 } 732 733 /** 734 * s3c_fb_setcolreg() - framebuffer layer request to change palette. 735 * @regno: The palette index to change. 736 * @red: The red field for the palette data. 737 * @green: The green field for the palette data. 738 * @blue: The blue field for the palette data. 739 * @trans: The transparency (alpha) field for the palette data. 740 * @info: The framebuffer being changed. 741 */ 742 static int s3c_fb_setcolreg(unsigned regno, 743 unsigned red, unsigned green, unsigned blue, 744 unsigned transp, struct fb_info *info) 745 { 746 struct s3c_fb_win *win = info->par; 747 struct s3c_fb *sfb = win->parent; 748 unsigned int val; 749 750 dev_dbg(sfb->dev, "%s: win %d: %d => rgb=%d/%d/%d\n", 751 __func__, win->index, regno, red, green, blue); 752 753 pm_runtime_get_sync(sfb->dev); 754 755 switch (info->fix.visual) { 756 case FB_VISUAL_TRUECOLOR: 757 /* true-colour, use pseudo-palette */ 758 759 if (regno < 16) { 760 u32 *pal = info->pseudo_palette; 761 762 val = chan_to_field(red, &info->var.red); 763 val |= chan_to_field(green, &info->var.green); 764 val |= chan_to_field(blue, &info->var.blue); 765 766 pal[regno] = val; 767 } 768 break; 769 770 case FB_VISUAL_PSEUDOCOLOR: 771 if (regno < win->variant.palette_sz) { 772 val = chan_to_field(red, &win->palette.r); 773 val |= chan_to_field(green, &win->palette.g); 774 val |= chan_to_field(blue, &win->palette.b); 775 776 s3c_fb_update_palette(sfb, win, regno, val); 777 } 778 779 break; 780 781 default: 782 pm_runtime_put_sync(sfb->dev); 783 return 1; /* unknown type */ 784 } 785 786 pm_runtime_put_sync(sfb->dev); 787 return 0; 788 } 789 790 /** 791 * s3c_fb_blank() - blank or unblank the given window 792 * @blank_mode: The blank state from FB_BLANK_* 793 * @info: The framebuffer to blank. 794 * 795 * Framebuffer layer request to change the power state. 796 */ 797 static int s3c_fb_blank(int blank_mode, struct fb_info *info) 798 { 799 struct s3c_fb_win *win = info->par; 800 struct s3c_fb *sfb = win->parent; 801 unsigned int index = win->index; 802 u32 wincon; 803 u32 output_on = sfb->output_on; 804 805 dev_dbg(sfb->dev, "blank mode %d\n", blank_mode); 806 807 pm_runtime_get_sync(sfb->dev); 808 809 wincon = readl(sfb->regs + sfb->variant.wincon + (index * 4)); 810 811 switch (blank_mode) { 812 case FB_BLANK_POWERDOWN: 813 wincon &= ~WINCONx_ENWIN; 814 sfb->enabled &= ~(1 << index); 815 /* fall through to FB_BLANK_NORMAL */ 816 817 case FB_BLANK_NORMAL: 818 /* disable the DMA and display 0x0 (black) */ 819 shadow_protect_win(win, 1); 820 writel(WINxMAP_MAP | WINxMAP_MAP_COLOUR(0x0), 821 sfb->regs + sfb->variant.winmap + (index * 4)); 822 shadow_protect_win(win, 0); 823 break; 824 825 case FB_BLANK_UNBLANK: 826 shadow_protect_win(win, 1); 827 writel(0x0, sfb->regs + sfb->variant.winmap + (index * 4)); 828 shadow_protect_win(win, 0); 829 wincon |= WINCONx_ENWIN; 830 sfb->enabled |= (1 << index); 831 break; 832 833 case FB_BLANK_VSYNC_SUSPEND: 834 case FB_BLANK_HSYNC_SUSPEND: 835 default: 836 pm_runtime_put_sync(sfb->dev); 837 return 1; 838 } 839 840 shadow_protect_win(win, 1); 841 writel(wincon, sfb->regs + sfb->variant.wincon + (index * 4)); 842 843 /* Check the enabled state to see if we need to be running the 844 * main LCD interface, as if there are no active windows then 845 * it is highly likely that we also do not need to output 846 * anything. 847 */ 848 s3c_fb_enable(sfb, sfb->enabled ? 1 : 0); 849 shadow_protect_win(win, 0); 850 851 pm_runtime_put_sync(sfb->dev); 852 853 return output_on == sfb->output_on; 854 } 855 856 /** 857 * s3c_fb_pan_display() - Pan the display. 858 * 859 * Note that the offsets can be written to the device at any time, as their 860 * values are latched at each vsync automatically. This also means that only 861 * the last call to this function will have any effect on next vsync, but 862 * there is no need to sleep waiting for it to prevent tearing. 863 * 864 * @var: The screen information to verify. 865 * @info: The framebuffer device. 866 */ 867 static int s3c_fb_pan_display(struct fb_var_screeninfo *var, 868 struct fb_info *info) 869 { 870 struct s3c_fb_win *win = info->par; 871 struct s3c_fb *sfb = win->parent; 872 void __iomem *buf = sfb->regs + win->index * 8; 873 unsigned int start_boff, end_boff; 874 875 pm_runtime_get_sync(sfb->dev); 876 877 /* Offset in bytes to the start of the displayed area */ 878 start_boff = var->yoffset * info->fix.line_length; 879 /* X offset depends on the current bpp */ 880 if (info->var.bits_per_pixel >= 8) { 881 start_boff += var->xoffset * (info->var.bits_per_pixel >> 3); 882 } else { 883 switch (info->var.bits_per_pixel) { 884 case 4: 885 start_boff += var->xoffset >> 1; 886 break; 887 case 2: 888 start_boff += var->xoffset >> 2; 889 break; 890 case 1: 891 start_boff += var->xoffset >> 3; 892 break; 893 default: 894 dev_err(sfb->dev, "invalid bpp\n"); 895 pm_runtime_put_sync(sfb->dev); 896 return -EINVAL; 897 } 898 } 899 /* Offset in bytes to the end of the displayed area */ 900 end_boff = start_boff + info->var.yres * info->fix.line_length; 901 902 /* Temporarily turn off per-vsync update from shadow registers until 903 * both start and end addresses are updated to prevent corruption */ 904 shadow_protect_win(win, 1); 905 906 writel(info->fix.smem_start + start_boff, buf + sfb->variant.buf_start); 907 writel(info->fix.smem_start + end_boff, buf + sfb->variant.buf_end); 908 909 shadow_protect_win(win, 0); 910 911 pm_runtime_put_sync(sfb->dev); 912 return 0; 913 } 914 915 /** 916 * s3c_fb_enable_irq() - enable framebuffer interrupts 917 * @sfb: main hardware state 918 */ 919 static void s3c_fb_enable_irq(struct s3c_fb *sfb) 920 { 921 void __iomem *regs = sfb->regs; 922 u32 irq_ctrl_reg; 923 924 if (!test_and_set_bit(S3C_FB_VSYNC_IRQ_EN, &sfb->irq_flags)) { 925 /* IRQ disabled, enable it */ 926 irq_ctrl_reg = readl(regs + VIDINTCON0); 927 928 irq_ctrl_reg |= VIDINTCON0_INT_ENABLE; 929 irq_ctrl_reg |= VIDINTCON0_INT_FRAME; 930 931 irq_ctrl_reg &= ~VIDINTCON0_FRAMESEL0_MASK; 932 irq_ctrl_reg |= VIDINTCON0_FRAMESEL0_VSYNC; 933 irq_ctrl_reg &= ~VIDINTCON0_FRAMESEL1_MASK; 934 irq_ctrl_reg |= VIDINTCON0_FRAMESEL1_NONE; 935 936 writel(irq_ctrl_reg, regs + VIDINTCON0); 937 } 938 } 939 940 /** 941 * s3c_fb_disable_irq() - disable framebuffer interrupts 942 * @sfb: main hardware state 943 */ 944 static void s3c_fb_disable_irq(struct s3c_fb *sfb) 945 { 946 void __iomem *regs = sfb->regs; 947 u32 irq_ctrl_reg; 948 949 if (test_and_clear_bit(S3C_FB_VSYNC_IRQ_EN, &sfb->irq_flags)) { 950 /* IRQ enabled, disable it */ 951 irq_ctrl_reg = readl(regs + VIDINTCON0); 952 953 irq_ctrl_reg &= ~VIDINTCON0_INT_FRAME; 954 irq_ctrl_reg &= ~VIDINTCON0_INT_ENABLE; 955 956 writel(irq_ctrl_reg, regs + VIDINTCON0); 957 } 958 } 959 960 static irqreturn_t s3c_fb_irq(int irq, void *dev_id) 961 { 962 struct s3c_fb *sfb = dev_id; 963 void __iomem *regs = sfb->regs; 964 u32 irq_sts_reg; 965 966 spin_lock(&sfb->slock); 967 968 irq_sts_reg = readl(regs + VIDINTCON1); 969 970 if (irq_sts_reg & VIDINTCON1_INT_FRAME) { 971 972 /* VSYNC interrupt, accept it */ 973 writel(VIDINTCON1_INT_FRAME, regs + VIDINTCON1); 974 975 sfb->vsync_info.count++; 976 wake_up_interruptible(&sfb->vsync_info.wait); 977 } 978 979 /* We only support waiting for VSYNC for now, so it's safe 980 * to always disable irqs here. 981 */ 982 s3c_fb_disable_irq(sfb); 983 984 spin_unlock(&sfb->slock); 985 return IRQ_HANDLED; 986 } 987 988 /** 989 * s3c_fb_wait_for_vsync() - sleep until next VSYNC interrupt or timeout 990 * @sfb: main hardware state 991 * @crtc: head index. 992 */ 993 static int s3c_fb_wait_for_vsync(struct s3c_fb *sfb, u32 crtc) 994 { 995 unsigned long count; 996 int ret; 997 998 if (crtc != 0) 999 return -ENODEV; 1000 1001 pm_runtime_get_sync(sfb->dev); 1002 1003 count = sfb->vsync_info.count; 1004 s3c_fb_enable_irq(sfb); 1005 ret = wait_event_interruptible_timeout(sfb->vsync_info.wait, 1006 count != sfb->vsync_info.count, 1007 msecs_to_jiffies(VSYNC_TIMEOUT_MSEC)); 1008 1009 pm_runtime_put_sync(sfb->dev); 1010 1011 if (ret == 0) 1012 return -ETIMEDOUT; 1013 1014 return 0; 1015 } 1016 1017 static int s3c_fb_ioctl(struct fb_info *info, unsigned int cmd, 1018 unsigned long arg) 1019 { 1020 struct s3c_fb_win *win = info->par; 1021 struct s3c_fb *sfb = win->parent; 1022 int ret; 1023 u32 crtc; 1024 1025 switch (cmd) { 1026 case FBIO_WAITFORVSYNC: 1027 if (get_user(crtc, (u32 __user *)arg)) { 1028 ret = -EFAULT; 1029 break; 1030 } 1031 1032 ret = s3c_fb_wait_for_vsync(sfb, crtc); 1033 break; 1034 default: 1035 ret = -ENOTTY; 1036 } 1037 1038 return ret; 1039 } 1040 1041 static struct fb_ops s3c_fb_ops = { 1042 .owner = THIS_MODULE, 1043 .fb_check_var = s3c_fb_check_var, 1044 .fb_set_par = s3c_fb_set_par, 1045 .fb_blank = s3c_fb_blank, 1046 .fb_setcolreg = s3c_fb_setcolreg, 1047 .fb_fillrect = cfb_fillrect, 1048 .fb_copyarea = cfb_copyarea, 1049 .fb_imageblit = cfb_imageblit, 1050 .fb_pan_display = s3c_fb_pan_display, 1051 .fb_ioctl = s3c_fb_ioctl, 1052 }; 1053 1054 /** 1055 * s3c_fb_missing_pixclock() - calculates pixel clock 1056 * @mode: The video mode to change. 1057 * 1058 * Calculate the pixel clock when none has been given through platform data. 1059 */ 1060 static void s3c_fb_missing_pixclock(struct fb_videomode *mode) 1061 { 1062 u64 pixclk = 1000000000000ULL; 1063 u32 div; 1064 1065 div = mode->left_margin + mode->hsync_len + mode->right_margin + 1066 mode->xres; 1067 div *= mode->upper_margin + mode->vsync_len + mode->lower_margin + 1068 mode->yres; 1069 div *= mode->refresh ? : 60; 1070 1071 do_div(pixclk, div); 1072 1073 mode->pixclock = pixclk; 1074 } 1075 1076 /** 1077 * s3c_fb_alloc_memory() - allocate display memory for framebuffer window 1078 * @sfb: The base resources for the hardware. 1079 * @win: The window to initialise memory for. 1080 * 1081 * Allocate memory for the given framebuffer. 1082 */ 1083 static int s3c_fb_alloc_memory(struct s3c_fb *sfb, struct s3c_fb_win *win) 1084 { 1085 struct s3c_fb_pd_win *windata = win->windata; 1086 unsigned int real_size, virt_size, size; 1087 struct fb_info *fbi = win->fbinfo; 1088 dma_addr_t map_dma; 1089 1090 dev_dbg(sfb->dev, "allocating memory for display\n"); 1091 1092 real_size = windata->xres * windata->yres; 1093 virt_size = windata->virtual_x * windata->virtual_y; 1094 1095 dev_dbg(sfb->dev, "real_size=%u (%u.%u), virt_size=%u (%u.%u)\n", 1096 real_size, windata->xres, windata->yres, 1097 virt_size, windata->virtual_x, windata->virtual_y); 1098 1099 size = (real_size > virt_size) ? real_size : virt_size; 1100 size *= (windata->max_bpp > 16) ? 32 : windata->max_bpp; 1101 size /= 8; 1102 1103 fbi->fix.smem_len = size; 1104 size = PAGE_ALIGN(size); 1105 1106 dev_dbg(sfb->dev, "want %u bytes for window\n", size); 1107 1108 fbi->screen_base = dma_alloc_wc(sfb->dev, size, &map_dma, GFP_KERNEL); 1109 if (!fbi->screen_base) 1110 return -ENOMEM; 1111 1112 dev_dbg(sfb->dev, "mapped %x to %p\n", 1113 (unsigned int)map_dma, fbi->screen_base); 1114 1115 memset(fbi->screen_base, 0x0, size); 1116 fbi->fix.smem_start = map_dma; 1117 1118 return 0; 1119 } 1120 1121 /** 1122 * s3c_fb_free_memory() - free the display memory for the given window 1123 * @sfb: The base resources for the hardware. 1124 * @win: The window to free the display memory for. 1125 * 1126 * Free the display memory allocated by s3c_fb_alloc_memory(). 1127 */ 1128 static void s3c_fb_free_memory(struct s3c_fb *sfb, struct s3c_fb_win *win) 1129 { 1130 struct fb_info *fbi = win->fbinfo; 1131 1132 if (fbi->screen_base) 1133 dma_free_wc(sfb->dev, PAGE_ALIGN(fbi->fix.smem_len), 1134 fbi->screen_base, fbi->fix.smem_start); 1135 } 1136 1137 /** 1138 * s3c_fb_release_win() - release resources for a framebuffer window. 1139 * @win: The window to cleanup the resources for. 1140 * 1141 * Release the resources that where claimed for the hardware window, 1142 * such as the framebuffer instance and any memory claimed for it. 1143 */ 1144 static void s3c_fb_release_win(struct s3c_fb *sfb, struct s3c_fb_win *win) 1145 { 1146 u32 data; 1147 1148 if (win->fbinfo) { 1149 if (sfb->variant.has_shadowcon) { 1150 data = readl(sfb->regs + SHADOWCON); 1151 data &= ~SHADOWCON_CHx_ENABLE(win->index); 1152 data &= ~SHADOWCON_CHx_LOCAL_ENABLE(win->index); 1153 writel(data, sfb->regs + SHADOWCON); 1154 } 1155 unregister_framebuffer(win->fbinfo); 1156 if (win->fbinfo->cmap.len) 1157 fb_dealloc_cmap(&win->fbinfo->cmap); 1158 s3c_fb_free_memory(sfb, win); 1159 framebuffer_release(win->fbinfo); 1160 } 1161 } 1162 1163 /** 1164 * s3c_fb_probe_win() - register an hardware window 1165 * @sfb: The base resources for the hardware 1166 * @variant: The variant information for this window. 1167 * @res: Pointer to where to place the resultant window. 1168 * 1169 * Allocate and do the basic initialisation for one of the hardware's graphics 1170 * windows. 1171 */ 1172 static int s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no, 1173 struct s3c_fb_win_variant *variant, 1174 struct s3c_fb_win **res) 1175 { 1176 struct fb_var_screeninfo *var; 1177 struct fb_videomode initmode; 1178 struct s3c_fb_pd_win *windata; 1179 struct s3c_fb_win *win; 1180 struct fb_info *fbinfo; 1181 int palette_size; 1182 int ret; 1183 1184 dev_dbg(sfb->dev, "probing window %d, variant %p\n", win_no, variant); 1185 1186 init_waitqueue_head(&sfb->vsync_info.wait); 1187 1188 palette_size = variant->palette_sz * 4; 1189 1190 fbinfo = framebuffer_alloc(sizeof(struct s3c_fb_win) + 1191 palette_size * sizeof(u32), sfb->dev); 1192 if (!fbinfo) { 1193 dev_err(sfb->dev, "failed to allocate framebuffer\n"); 1194 return -ENOENT; 1195 } 1196 1197 windata = sfb->pdata->win[win_no]; 1198 initmode = *sfb->pdata->vtiming; 1199 1200 WARN_ON(windata->max_bpp == 0); 1201 WARN_ON(windata->xres == 0); 1202 WARN_ON(windata->yres == 0); 1203 1204 win = fbinfo->par; 1205 *res = win; 1206 var = &fbinfo->var; 1207 win->variant = *variant; 1208 win->fbinfo = fbinfo; 1209 win->parent = sfb; 1210 win->windata = windata; 1211 win->index = win_no; 1212 win->palette_buffer = (u32 *)(win + 1); 1213 1214 ret = s3c_fb_alloc_memory(sfb, win); 1215 if (ret) { 1216 dev_err(sfb->dev, "failed to allocate display memory\n"); 1217 return ret; 1218 } 1219 1220 /* setup the r/b/g positions for the window's palette */ 1221 if (win->variant.palette_16bpp) { 1222 /* Set RGB 5:6:5 as default */ 1223 win->palette.r.offset = 11; 1224 win->palette.r.length = 5; 1225 win->palette.g.offset = 5; 1226 win->palette.g.length = 6; 1227 win->palette.b.offset = 0; 1228 win->palette.b.length = 5; 1229 1230 } else { 1231 /* Set 8bpp or 8bpp and 1bit alpha */ 1232 win->palette.r.offset = 16; 1233 win->palette.r.length = 8; 1234 win->palette.g.offset = 8; 1235 win->palette.g.length = 8; 1236 win->palette.b.offset = 0; 1237 win->palette.b.length = 8; 1238 } 1239 1240 /* setup the initial video mode from the window */ 1241 initmode.xres = windata->xres; 1242 initmode.yres = windata->yres; 1243 fb_videomode_to_var(&fbinfo->var, &initmode); 1244 1245 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS; 1246 fbinfo->fix.accel = FB_ACCEL_NONE; 1247 fbinfo->var.activate = FB_ACTIVATE_NOW; 1248 fbinfo->var.vmode = FB_VMODE_NONINTERLACED; 1249 fbinfo->var.bits_per_pixel = windata->default_bpp; 1250 fbinfo->fbops = &s3c_fb_ops; 1251 fbinfo->flags = FBINFO_FLAG_DEFAULT; 1252 fbinfo->pseudo_palette = &win->pseudo_palette; 1253 1254 /* prepare to actually start the framebuffer */ 1255 1256 ret = s3c_fb_check_var(&fbinfo->var, fbinfo); 1257 if (ret < 0) { 1258 dev_err(sfb->dev, "check_var failed on initial video params\n"); 1259 return ret; 1260 } 1261 1262 /* create initial colour map */ 1263 1264 ret = fb_alloc_cmap(&fbinfo->cmap, win->variant.palette_sz, 1); 1265 if (ret == 0) 1266 fb_set_cmap(&fbinfo->cmap, fbinfo); 1267 else 1268 dev_err(sfb->dev, "failed to allocate fb cmap\n"); 1269 1270 s3c_fb_set_par(fbinfo); 1271 1272 dev_dbg(sfb->dev, "about to register framebuffer\n"); 1273 1274 /* run the check_var and set_par on our configuration. */ 1275 1276 ret = register_framebuffer(fbinfo); 1277 if (ret < 0) { 1278 dev_err(sfb->dev, "failed to register framebuffer\n"); 1279 return ret; 1280 } 1281 1282 dev_info(sfb->dev, "window %d: fb %s\n", win_no, fbinfo->fix.id); 1283 1284 return 0; 1285 } 1286 1287 /** 1288 * s3c_fb_set_rgb_timing() - set video timing for rgb interface. 1289 * @sfb: The base resources for the hardware. 1290 * 1291 * Set horizontal and vertical lcd rgb interface timing. 1292 */ 1293 static void s3c_fb_set_rgb_timing(struct s3c_fb *sfb) 1294 { 1295 struct fb_videomode *vmode = sfb->pdata->vtiming; 1296 void __iomem *regs = sfb->regs; 1297 int clkdiv; 1298 u32 data; 1299 1300 if (!vmode->pixclock) 1301 s3c_fb_missing_pixclock(vmode); 1302 1303 clkdiv = s3c_fb_calc_pixclk(sfb, vmode->pixclock); 1304 1305 data = sfb->pdata->vidcon0; 1306 data &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR); 1307 1308 if (clkdiv > 1) 1309 data |= VIDCON0_CLKVAL_F(clkdiv-1) | VIDCON0_CLKDIR; 1310 else 1311 data &= ~VIDCON0_CLKDIR; /* 1:1 clock */ 1312 1313 if (sfb->variant.is_2443) 1314 data |= (1 << 5); 1315 writel(data, regs + VIDCON0); 1316 1317 data = VIDTCON0_VBPD(vmode->upper_margin - 1) | 1318 VIDTCON0_VFPD(vmode->lower_margin - 1) | 1319 VIDTCON0_VSPW(vmode->vsync_len - 1); 1320 writel(data, regs + sfb->variant.vidtcon); 1321 1322 data = VIDTCON1_HBPD(vmode->left_margin - 1) | 1323 VIDTCON1_HFPD(vmode->right_margin - 1) | 1324 VIDTCON1_HSPW(vmode->hsync_len - 1); 1325 writel(data, regs + sfb->variant.vidtcon + 4); 1326 1327 data = VIDTCON2_LINEVAL(vmode->yres - 1) | 1328 VIDTCON2_HOZVAL(vmode->xres - 1) | 1329 VIDTCON2_LINEVAL_E(vmode->yres - 1) | 1330 VIDTCON2_HOZVAL_E(vmode->xres - 1); 1331 writel(data, regs + sfb->variant.vidtcon + 8); 1332 } 1333 1334 /** 1335 * s3c_fb_clear_win() - clear hardware window registers. 1336 * @sfb: The base resources for the hardware. 1337 * @win: The window to process. 1338 * 1339 * Reset the specific window registers to a known state. 1340 */ 1341 static void s3c_fb_clear_win(struct s3c_fb *sfb, int win) 1342 { 1343 void __iomem *regs = sfb->regs; 1344 u32 reg; 1345 1346 writel(0, regs + sfb->variant.wincon + (win * 4)); 1347 writel(0, regs + VIDOSD_A(win, sfb->variant)); 1348 writel(0, regs + VIDOSD_B(win, sfb->variant)); 1349 writel(0, regs + VIDOSD_C(win, sfb->variant)); 1350 1351 if (sfb->variant.has_shadowcon) { 1352 reg = readl(sfb->regs + SHADOWCON); 1353 reg &= ~(SHADOWCON_WINx_PROTECT(win) | 1354 SHADOWCON_CHx_ENABLE(win) | 1355 SHADOWCON_CHx_LOCAL_ENABLE(win)); 1356 writel(reg, sfb->regs + SHADOWCON); 1357 } 1358 } 1359 1360 static int s3c_fb_probe(struct platform_device *pdev) 1361 { 1362 const struct platform_device_id *platid; 1363 struct s3c_fb_driverdata *fbdrv; 1364 struct device *dev = &pdev->dev; 1365 struct s3c_fb_platdata *pd; 1366 struct s3c_fb *sfb; 1367 struct resource *res; 1368 int win; 1369 int ret = 0; 1370 u32 reg; 1371 1372 platid = platform_get_device_id(pdev); 1373 fbdrv = (struct s3c_fb_driverdata *)platid->driver_data; 1374 1375 if (fbdrv->variant.nr_windows > S3C_FB_MAX_WIN) { 1376 dev_err(dev, "too many windows, cannot attach\n"); 1377 return -EINVAL; 1378 } 1379 1380 pd = dev_get_platdata(&pdev->dev); 1381 if (!pd) { 1382 dev_err(dev, "no platform data specified\n"); 1383 return -EINVAL; 1384 } 1385 1386 sfb = devm_kzalloc(dev, sizeof(*sfb), GFP_KERNEL); 1387 if (!sfb) 1388 return -ENOMEM; 1389 1390 dev_dbg(dev, "allocate new framebuffer %p\n", sfb); 1391 1392 sfb->dev = dev; 1393 sfb->pdata = pd; 1394 sfb->variant = fbdrv->variant; 1395 1396 spin_lock_init(&sfb->slock); 1397 1398 sfb->bus_clk = devm_clk_get(dev, "lcd"); 1399 if (IS_ERR(sfb->bus_clk)) { 1400 dev_err(dev, "failed to get bus clock\n"); 1401 return PTR_ERR(sfb->bus_clk); 1402 } 1403 1404 clk_prepare_enable(sfb->bus_clk); 1405 1406 if (!sfb->variant.has_clksel) { 1407 sfb->lcd_clk = devm_clk_get(dev, "sclk_fimd"); 1408 if (IS_ERR(sfb->lcd_clk)) { 1409 dev_err(dev, "failed to get lcd clock\n"); 1410 ret = PTR_ERR(sfb->lcd_clk); 1411 goto err_bus_clk; 1412 } 1413 1414 clk_prepare_enable(sfb->lcd_clk); 1415 } 1416 1417 pm_runtime_enable(sfb->dev); 1418 1419 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1420 sfb->regs = devm_ioremap_resource(dev, res); 1421 if (IS_ERR(sfb->regs)) { 1422 ret = PTR_ERR(sfb->regs); 1423 goto err_lcd_clk; 1424 } 1425 1426 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 1427 if (!res) { 1428 dev_err(dev, "failed to acquire irq resource\n"); 1429 ret = -ENOENT; 1430 goto err_lcd_clk; 1431 } 1432 sfb->irq_no = res->start; 1433 ret = devm_request_irq(dev, sfb->irq_no, s3c_fb_irq, 1434 0, "s3c_fb", sfb); 1435 if (ret) { 1436 dev_err(dev, "irq request failed\n"); 1437 goto err_lcd_clk; 1438 } 1439 1440 dev_dbg(dev, "got resources (regs %p), probing windows\n", sfb->regs); 1441 1442 platform_set_drvdata(pdev, sfb); 1443 pm_runtime_get_sync(sfb->dev); 1444 1445 /* setup gpio and output polarity controls */ 1446 1447 pd->setup_gpio(); 1448 1449 writel(pd->vidcon1, sfb->regs + VIDCON1); 1450 1451 /* set video clock running at under-run */ 1452 if (sfb->variant.has_fixvclk) { 1453 reg = readl(sfb->regs + VIDCON1); 1454 reg &= ~VIDCON1_VCLK_MASK; 1455 reg |= VIDCON1_VCLK_RUN; 1456 writel(reg, sfb->regs + VIDCON1); 1457 } 1458 1459 /* zero all windows before we do anything */ 1460 1461 for (win = 0; win < fbdrv->variant.nr_windows; win++) 1462 s3c_fb_clear_win(sfb, win); 1463 1464 /* initialise colour key controls */ 1465 for (win = 0; win < (fbdrv->variant.nr_windows - 1); win++) { 1466 void __iomem *regs = sfb->regs + sfb->variant.keycon; 1467 1468 regs += (win * 8); 1469 writel(0xffffff, regs + WKEYCON0); 1470 writel(0xffffff, regs + WKEYCON1); 1471 } 1472 1473 s3c_fb_set_rgb_timing(sfb); 1474 1475 /* we have the register setup, start allocating framebuffers */ 1476 1477 for (win = 0; win < fbdrv->variant.nr_windows; win++) { 1478 if (!pd->win[win]) 1479 continue; 1480 1481 ret = s3c_fb_probe_win(sfb, win, fbdrv->win[win], 1482 &sfb->windows[win]); 1483 if (ret < 0) { 1484 dev_err(dev, "failed to create window %d\n", win); 1485 for (; win >= 0; win--) 1486 s3c_fb_release_win(sfb, sfb->windows[win]); 1487 goto err_pm_runtime; 1488 } 1489 } 1490 1491 platform_set_drvdata(pdev, sfb); 1492 pm_runtime_put_sync(sfb->dev); 1493 1494 return 0; 1495 1496 err_pm_runtime: 1497 pm_runtime_put_sync(sfb->dev); 1498 1499 err_lcd_clk: 1500 pm_runtime_disable(sfb->dev); 1501 1502 if (!sfb->variant.has_clksel) 1503 clk_disable_unprepare(sfb->lcd_clk); 1504 1505 err_bus_clk: 1506 clk_disable_unprepare(sfb->bus_clk); 1507 1508 return ret; 1509 } 1510 1511 /** 1512 * s3c_fb_remove() - Cleanup on module finalisation 1513 * @pdev: The platform device we are bound to. 1514 * 1515 * Shutdown and then release all the resources that the driver allocated 1516 * on initialisation. 1517 */ 1518 static int s3c_fb_remove(struct platform_device *pdev) 1519 { 1520 struct s3c_fb *sfb = platform_get_drvdata(pdev); 1521 int win; 1522 1523 pm_runtime_get_sync(sfb->dev); 1524 1525 for (win = 0; win < S3C_FB_MAX_WIN; win++) 1526 if (sfb->windows[win]) 1527 s3c_fb_release_win(sfb, sfb->windows[win]); 1528 1529 if (!sfb->variant.has_clksel) 1530 clk_disable_unprepare(sfb->lcd_clk); 1531 1532 clk_disable_unprepare(sfb->bus_clk); 1533 1534 pm_runtime_put_sync(sfb->dev); 1535 pm_runtime_disable(sfb->dev); 1536 1537 return 0; 1538 } 1539 1540 #ifdef CONFIG_PM_SLEEP 1541 static int s3c_fb_suspend(struct device *dev) 1542 { 1543 struct s3c_fb *sfb = dev_get_drvdata(dev); 1544 struct s3c_fb_win *win; 1545 int win_no; 1546 1547 pm_runtime_get_sync(sfb->dev); 1548 1549 for (win_no = S3C_FB_MAX_WIN - 1; win_no >= 0; win_no--) { 1550 win = sfb->windows[win_no]; 1551 if (!win) 1552 continue; 1553 1554 /* use the blank function to push into power-down */ 1555 s3c_fb_blank(FB_BLANK_POWERDOWN, win->fbinfo); 1556 } 1557 1558 if (!sfb->variant.has_clksel) 1559 clk_disable_unprepare(sfb->lcd_clk); 1560 1561 clk_disable_unprepare(sfb->bus_clk); 1562 1563 pm_runtime_put_sync(sfb->dev); 1564 1565 return 0; 1566 } 1567 1568 static int s3c_fb_resume(struct device *dev) 1569 { 1570 struct s3c_fb *sfb = dev_get_drvdata(dev); 1571 struct s3c_fb_platdata *pd = sfb->pdata; 1572 struct s3c_fb_win *win; 1573 int win_no; 1574 u32 reg; 1575 1576 pm_runtime_get_sync(sfb->dev); 1577 1578 clk_prepare_enable(sfb->bus_clk); 1579 1580 if (!sfb->variant.has_clksel) 1581 clk_prepare_enable(sfb->lcd_clk); 1582 1583 /* setup gpio and output polarity controls */ 1584 pd->setup_gpio(); 1585 writel(pd->vidcon1, sfb->regs + VIDCON1); 1586 1587 /* set video clock running at under-run */ 1588 if (sfb->variant.has_fixvclk) { 1589 reg = readl(sfb->regs + VIDCON1); 1590 reg &= ~VIDCON1_VCLK_MASK; 1591 reg |= VIDCON1_VCLK_RUN; 1592 writel(reg, sfb->regs + VIDCON1); 1593 } 1594 1595 /* zero all windows before we do anything */ 1596 for (win_no = 0; win_no < sfb->variant.nr_windows; win_no++) 1597 s3c_fb_clear_win(sfb, win_no); 1598 1599 for (win_no = 0; win_no < sfb->variant.nr_windows - 1; win_no++) { 1600 void __iomem *regs = sfb->regs + sfb->variant.keycon; 1601 win = sfb->windows[win_no]; 1602 if (!win) 1603 continue; 1604 1605 shadow_protect_win(win, 1); 1606 regs += (win_no * 8); 1607 writel(0xffffff, regs + WKEYCON0); 1608 writel(0xffffff, regs + WKEYCON1); 1609 shadow_protect_win(win, 0); 1610 } 1611 1612 s3c_fb_set_rgb_timing(sfb); 1613 1614 /* restore framebuffers */ 1615 for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) { 1616 win = sfb->windows[win_no]; 1617 if (!win) 1618 continue; 1619 1620 dev_dbg(dev, "resuming window %d\n", win_no); 1621 s3c_fb_set_par(win->fbinfo); 1622 } 1623 1624 pm_runtime_put_sync(sfb->dev); 1625 1626 return 0; 1627 } 1628 #endif 1629 1630 #ifdef CONFIG_PM 1631 static int s3c_fb_runtime_suspend(struct device *dev) 1632 { 1633 struct s3c_fb *sfb = dev_get_drvdata(dev); 1634 1635 if (!sfb->variant.has_clksel) 1636 clk_disable_unprepare(sfb->lcd_clk); 1637 1638 clk_disable_unprepare(sfb->bus_clk); 1639 1640 return 0; 1641 } 1642 1643 static int s3c_fb_runtime_resume(struct device *dev) 1644 { 1645 struct s3c_fb *sfb = dev_get_drvdata(dev); 1646 struct s3c_fb_platdata *pd = sfb->pdata; 1647 1648 clk_prepare_enable(sfb->bus_clk); 1649 1650 if (!sfb->variant.has_clksel) 1651 clk_prepare_enable(sfb->lcd_clk); 1652 1653 /* setup gpio and output polarity controls */ 1654 pd->setup_gpio(); 1655 writel(pd->vidcon1, sfb->regs + VIDCON1); 1656 1657 return 0; 1658 } 1659 #endif 1660 1661 #define VALID_BPP124 (VALID_BPP(1) | VALID_BPP(2) | VALID_BPP(4)) 1662 #define VALID_BPP1248 (VALID_BPP124 | VALID_BPP(8)) 1663 1664 static struct s3c_fb_win_variant s3c_fb_data_64xx_wins[] = { 1665 [0] = { 1666 .has_osd_c = 1, 1667 .osd_size_off = 0x8, 1668 .palette_sz = 256, 1669 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1670 VALID_BPP(18) | VALID_BPP(24)), 1671 }, 1672 [1] = { 1673 .has_osd_c = 1, 1674 .has_osd_d = 1, 1675 .osd_size_off = 0xc, 1676 .has_osd_alpha = 1, 1677 .palette_sz = 256, 1678 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1679 VALID_BPP(18) | VALID_BPP(19) | 1680 VALID_BPP(24) | VALID_BPP(25) | 1681 VALID_BPP(28)), 1682 }, 1683 [2] = { 1684 .has_osd_c = 1, 1685 .has_osd_d = 1, 1686 .osd_size_off = 0xc, 1687 .has_osd_alpha = 1, 1688 .palette_sz = 16, 1689 .palette_16bpp = 1, 1690 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1691 VALID_BPP(18) | VALID_BPP(19) | 1692 VALID_BPP(24) | VALID_BPP(25) | 1693 VALID_BPP(28)), 1694 }, 1695 [3] = { 1696 .has_osd_c = 1, 1697 .has_osd_alpha = 1, 1698 .palette_sz = 16, 1699 .palette_16bpp = 1, 1700 .valid_bpp = (VALID_BPP124 | VALID_BPP(16) | 1701 VALID_BPP(18) | VALID_BPP(19) | 1702 VALID_BPP(24) | VALID_BPP(25) | 1703 VALID_BPP(28)), 1704 }, 1705 [4] = { 1706 .has_osd_c = 1, 1707 .has_osd_alpha = 1, 1708 .palette_sz = 4, 1709 .palette_16bpp = 1, 1710 .valid_bpp = (VALID_BPP(1) | VALID_BPP(2) | 1711 VALID_BPP(16) | VALID_BPP(18) | 1712 VALID_BPP(19) | VALID_BPP(24) | 1713 VALID_BPP(25) | VALID_BPP(28)), 1714 }, 1715 }; 1716 1717 static struct s3c_fb_driverdata s3c_fb_data_64xx = { 1718 .variant = { 1719 .nr_windows = 5, 1720 .vidtcon = VIDTCON0, 1721 .wincon = WINCON(0), 1722 .winmap = WINxMAP(0), 1723 .keycon = WKEYCON, 1724 .osd = VIDOSD_BASE, 1725 .osd_stride = 16, 1726 .buf_start = VIDW_BUF_START(0), 1727 .buf_size = VIDW_BUF_SIZE(0), 1728 .buf_end = VIDW_BUF_END(0), 1729 1730 .palette = { 1731 [0] = 0x400, 1732 [1] = 0x800, 1733 [2] = 0x300, 1734 [3] = 0x320, 1735 [4] = 0x340, 1736 }, 1737 1738 .has_prtcon = 1, 1739 .has_clksel = 1, 1740 }, 1741 .win[0] = &s3c_fb_data_64xx_wins[0], 1742 .win[1] = &s3c_fb_data_64xx_wins[1], 1743 .win[2] = &s3c_fb_data_64xx_wins[2], 1744 .win[3] = &s3c_fb_data_64xx_wins[3], 1745 .win[4] = &s3c_fb_data_64xx_wins[4], 1746 }; 1747 1748 /* S3C2443/S3C2416 style hardware */ 1749 static struct s3c_fb_driverdata s3c_fb_data_s3c2443 = { 1750 .variant = { 1751 .nr_windows = 2, 1752 .is_2443 = 1, 1753 1754 .vidtcon = 0x08, 1755 .wincon = 0x14, 1756 .winmap = 0xd0, 1757 .keycon = 0xb0, 1758 .osd = 0x28, 1759 .osd_stride = 12, 1760 .buf_start = 0x64, 1761 .buf_size = 0x94, 1762 .buf_end = 0x7c, 1763 1764 .palette = { 1765 [0] = 0x400, 1766 [1] = 0x800, 1767 }, 1768 .has_clksel = 1, 1769 }, 1770 .win[0] = &(struct s3c_fb_win_variant) { 1771 .palette_sz = 256, 1772 .valid_bpp = VALID_BPP1248 | VALID_BPP(16) | VALID_BPP(24), 1773 }, 1774 .win[1] = &(struct s3c_fb_win_variant) { 1775 .has_osd_c = 1, 1776 .has_osd_alpha = 1, 1777 .palette_sz = 256, 1778 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1779 VALID_BPP(18) | VALID_BPP(19) | 1780 VALID_BPP(24) | VALID_BPP(25) | 1781 VALID_BPP(28)), 1782 }, 1783 }; 1784 1785 static const struct platform_device_id s3c_fb_driver_ids[] = { 1786 { 1787 .name = "s3c-fb", 1788 .driver_data = (unsigned long)&s3c_fb_data_64xx, 1789 }, { 1790 .name = "s3c2443-fb", 1791 .driver_data = (unsigned long)&s3c_fb_data_s3c2443, 1792 }, 1793 {}, 1794 }; 1795 MODULE_DEVICE_TABLE(platform, s3c_fb_driver_ids); 1796 1797 static const struct dev_pm_ops s3cfb_pm_ops = { 1798 SET_SYSTEM_SLEEP_PM_OPS(s3c_fb_suspend, s3c_fb_resume) 1799 SET_RUNTIME_PM_OPS(s3c_fb_runtime_suspend, s3c_fb_runtime_resume, 1800 NULL) 1801 }; 1802 1803 static struct platform_driver s3c_fb_driver = { 1804 .probe = s3c_fb_probe, 1805 .remove = s3c_fb_remove, 1806 .id_table = s3c_fb_driver_ids, 1807 .driver = { 1808 .name = "s3c-fb", 1809 .pm = &s3cfb_pm_ops, 1810 }, 1811 }; 1812 1813 module_platform_driver(s3c_fb_driver); 1814 1815 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); 1816 MODULE_DESCRIPTION("Samsung S3C SoC Framebuffer driver"); 1817 MODULE_LICENSE("GPL"); 1818 MODULE_ALIAS("platform:s3c-fb"); 1819