1// SPDX-License-Identifier: GPL-2.0-only 2/* linux/drivers/video/s3c-fb.c 3 * 4 * Copyright 2008 Openmoko Inc. 5 * Copyright 2008-2010 Simtec Electronics 6 * Ben Dooks <ben@simtec.co.uk> 7 * http://armlinux.simtec.co.uk/ 8 * 9 * Samsung SoC Framebuffer driver 10*/ 11 12#include <linux/kernel.h> 13#include <linux/module.h> 14#include <linux/platform_device.h> 15#include <linux/dma-mapping.h> 16#include <linux/slab.h> 17#include <linux/init.h> 18#include <linux/clk.h> 19#include <linux/fb.h> 20#include <linux/io.h> 21#include <linux/uaccess.h> 22#include <linux/interrupt.h> 23#include <linux/pm_runtime.h> 24#include <linux/platform_data/video_s3c.h> 25 26#include <video/samsung_fimd.h> 27 28/* This driver will export a number of framebuffer interfaces depending 29 * on the configuration passed in via the platform data. Each fb instance 30 * maps to a hardware window. Currently there is no support for runtime 31 * setting of the alpha-blending functions that each window has, so only 32 * window 0 is actually useful. 33 * 34 * Window 0 is treated specially, it is used for the basis of the LCD 35 * output timings and as the control for the output power-down state. 36*/ 37 38/* note, the previous use of <mach/regs-fb.h> to get platform specific data 39 * has been replaced by using the platform device name to pick the correct 40 * configuration data for the system. 41*/ 42 43#ifdef CONFIG_FB_S3C_DEBUG_REGWRITE 44#undef writel 45#define writel(v, r) do { \ 46 pr_debug("%s: %08x => %p\n", __func__, (unsigned int)v, r); \ 47 __raw_writel(v, r); \ 48} while (0) 49#endif /* FB_S3C_DEBUG_REGWRITE */ 50 51/* irq_flags bits */ 52#define S3C_FB_VSYNC_IRQ_EN 0 53 54#define VSYNC_TIMEOUT_MSEC 50 55 56struct s3c_fb; 57 58#define VALID_BPP(x) (1 << ((x) - 1)) 59 60#define OSD_BASE(win, variant) ((variant).osd + ((win) * (variant).osd_stride)) 61#define VIDOSD_A(win, variant) (OSD_BASE(win, variant) + 0x00) 62#define VIDOSD_B(win, variant) (OSD_BASE(win, variant) + 0x04) 63#define VIDOSD_C(win, variant) (OSD_BASE(win, variant) + 0x08) 64#define VIDOSD_D(win, variant) (OSD_BASE(win, variant) + 0x0C) 65 66/** 67 * struct s3c_fb_variant - fb variant information 68 * @is_2443: Set if S3C2443/S3C2416 style hardware. 69 * @nr_windows: The number of windows. 70 * @vidtcon: The base for the VIDTCONx registers 71 * @wincon: The base for the WINxCON registers. 72 * @winmap: The base for the WINxMAP registers. 73 * @keycon: The abse for the WxKEYCON registers. 74 * @buf_start: Offset of buffer start registers. 75 * @buf_size: Offset of buffer size registers. 76 * @buf_end: Offset of buffer end registers. 77 * @osd: The base for the OSD registers. 78 * @palette: Address of palette memory, or 0 if none. 79 * @has_prtcon: Set if has PRTCON register. 80 * @has_shadowcon: Set if has SHADOWCON register. 81 * @has_blendcon: Set if has BLENDCON register. 82 * @has_clksel: Set if VIDCON0 register has CLKSEL bit. 83 * @has_fixvclk: Set if VIDCON1 register has FIXVCLK bits. 84 */ 85struct s3c_fb_variant { 86 unsigned int is_2443:1; 87 unsigned short nr_windows; 88 unsigned int vidtcon; 89 unsigned short wincon; 90 unsigned short winmap; 91 unsigned short keycon; 92 unsigned short buf_start; 93 unsigned short buf_end; 94 unsigned short buf_size; 95 unsigned short osd; 96 unsigned short osd_stride; 97 unsigned short palette[S3C_FB_MAX_WIN]; 98 99 unsigned int has_prtcon:1; 100 unsigned int has_shadowcon:1; 101 unsigned int has_blendcon:1; 102 unsigned int has_clksel:1; 103 unsigned int has_fixvclk:1; 104}; 105 106/** 107 * struct s3c_fb_win_variant 108 * @has_osd_c: Set if has OSD C register. 109 * @has_osd_d: Set if has OSD D register. 110 * @has_osd_alpha: Set if can change alpha transparency for a window. 111 * @palette_sz: Size of palette in entries. 112 * @palette_16bpp: Set if palette is 16bits wide. 113 * @osd_size_off: If != 0, supports setting up OSD for a window; the appropriate 114 * register is located at the given offset from OSD_BASE. 115 * @valid_bpp: 1 bit per BPP setting to show valid bits-per-pixel. 116 * 117 * valid_bpp bit x is set if (x+1)BPP is supported. 118 */ 119struct s3c_fb_win_variant { 120 unsigned int has_osd_c:1; 121 unsigned int has_osd_d:1; 122 unsigned int has_osd_alpha:1; 123 unsigned int palette_16bpp:1; 124 unsigned short osd_size_off; 125 unsigned short palette_sz; 126 u32 valid_bpp; 127}; 128 129/** 130 * struct s3c_fb_driverdata - per-device type driver data for init time. 131 * @variant: The variant information for this driver. 132 * @win: The window information for each window. 133 */ 134struct s3c_fb_driverdata { 135 struct s3c_fb_variant variant; 136 struct s3c_fb_win_variant *win[S3C_FB_MAX_WIN]; 137}; 138 139/** 140 * struct s3c_fb_palette - palette information 141 * @r: Red bitfield. 142 * @g: Green bitfield. 143 * @b: Blue bitfield. 144 * @a: Alpha bitfield. 145 */ 146struct s3c_fb_palette { 147 struct fb_bitfield r; 148 struct fb_bitfield g; 149 struct fb_bitfield b; 150 struct fb_bitfield a; 151}; 152 153/** 154 * struct s3c_fb_win - per window private data for each framebuffer. 155 * @windata: The platform data supplied for the window configuration. 156 * @parent: The hardware that this window is part of. 157 * @fbinfo: Pointer pack to the framebuffer info for this window. 158 * @varint: The variant information for this window. 159 * @palette_buffer: Buffer/cache to hold palette entries. 160 * @pseudo_palette: For use in TRUECOLOUR modes for entries 0..15/ 161 * @index: The window number of this window. 162 * @palette: The bitfields for changing r/g/b into a hardware palette entry. 163 */ 164struct s3c_fb_win { 165 struct s3c_fb_pd_win *windata; 166 struct s3c_fb *parent; 167 struct fb_info *fbinfo; 168 struct s3c_fb_palette palette; 169 struct s3c_fb_win_variant variant; 170 171 u32 *palette_buffer; 172 u32 pseudo_palette[16]; 173 unsigned int index; 174}; 175 176/** 177 * struct s3c_fb_vsync - vsync information 178 * @wait: a queue for processes waiting for vsync 179 * @count: vsync interrupt count 180 */ 181struct s3c_fb_vsync { 182 wait_queue_head_t wait; 183 unsigned int count; 184}; 185 186/** 187 * struct s3c_fb - overall hardware state of the hardware 188 * @slock: The spinlock protection for this data structure. 189 * @dev: The device that we bound to, for printing, etc. 190 * @bus_clk: The clk (hclk) feeding our interface and possibly pixclk. 191 * @lcd_clk: The clk (sclk) feeding pixclk. 192 * @regs: The mapped hardware registers. 193 * @variant: Variant information for this hardware. 194 * @enabled: A bitmask of enabled hardware windows. 195 * @output_on: Flag if the physical output is enabled. 196 * @pdata: The platform configuration data passed with the device. 197 * @windows: The hardware windows that have been claimed. 198 * @irq_no: IRQ line number 199 * @irq_flags: irq flags 200 * @vsync_info: VSYNC-related information (count, queues...) 201 */ 202struct s3c_fb { 203 spinlock_t slock; 204 struct device *dev; 205 struct clk *bus_clk; 206 struct clk *lcd_clk; 207 void __iomem *regs; 208 struct s3c_fb_variant variant; 209 210 unsigned char enabled; 211 bool output_on; 212 213 struct s3c_fb_platdata *pdata; 214 struct s3c_fb_win *windows[S3C_FB_MAX_WIN]; 215 216 int irq_no; 217 unsigned long irq_flags; 218 struct s3c_fb_vsync vsync_info; 219}; 220 221/** 222 * s3c_fb_validate_win_bpp - validate the bits-per-pixel for this mode. 223 * @win: The device window. 224 * @bpp: The bit depth. 225 */ 226static bool s3c_fb_validate_win_bpp(struct s3c_fb_win *win, unsigned int bpp) 227{ 228 return win->variant.valid_bpp & VALID_BPP(bpp); 229} 230 231/** 232 * s3c_fb_check_var() - framebuffer layer request to verify a given mode. 233 * @var: The screen information to verify. 234 * @info: The framebuffer device. 235 * 236 * Framebuffer layer call to verify the given information and allow us to 237 * update various information depending on the hardware capabilities. 238 */ 239static int s3c_fb_check_var(struct fb_var_screeninfo *var, 240 struct fb_info *info) 241{ 242 struct s3c_fb_win *win = info->par; 243 struct s3c_fb *sfb = win->parent; 244 245 dev_dbg(sfb->dev, "checking parameters\n"); 246 247 var->xres_virtual = max(var->xres_virtual, var->xres); 248 var->yres_virtual = max(var->yres_virtual, var->yres); 249 250 if (!s3c_fb_validate_win_bpp(win, var->bits_per_pixel)) { 251 dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n", 252 win->index, var->bits_per_pixel); 253 return -EINVAL; 254 } 255 256 /* always ensure these are zero, for drop through cases below */ 257 var->transp.offset = 0; 258 var->transp.length = 0; 259 260 switch (var->bits_per_pixel) { 261 case 1: 262 case 2: 263 case 4: 264 case 8: 265 if (sfb->variant.palette[win->index] != 0) { 266 /* non palletised, A:1,R:2,G:3,B:2 mode */ 267 var->red.offset = 5; 268 var->green.offset = 2; 269 var->blue.offset = 0; 270 var->red.length = 2; 271 var->green.length = 3; 272 var->blue.length = 2; 273 var->transp.offset = 7; 274 var->transp.length = 1; 275 } else { 276 var->red.offset = 0; 277 var->red.length = var->bits_per_pixel; 278 var->green = var->red; 279 var->blue = var->red; 280 } 281 break; 282 283 case 19: 284 /* 666 with one bit alpha/transparency */ 285 var->transp.offset = 18; 286 var->transp.length = 1; 287 fallthrough; 288 case 18: 289 var->bits_per_pixel = 32; 290 291 /* 666 format */ 292 var->red.offset = 12; 293 var->green.offset = 6; 294 var->blue.offset = 0; 295 var->red.length = 6; 296 var->green.length = 6; 297 var->blue.length = 6; 298 break; 299 300 case 16: 301 /* 16 bpp, 565 format */ 302 var->red.offset = 11; 303 var->green.offset = 5; 304 var->blue.offset = 0; 305 var->red.length = 5; 306 var->green.length = 6; 307 var->blue.length = 5; 308 break; 309 310 case 32: 311 case 28: 312 case 25: 313 var->transp.length = var->bits_per_pixel - 24; 314 var->transp.offset = 24; 315 fallthrough; 316 case 24: 317 /* our 24bpp is unpacked, so 32bpp */ 318 var->bits_per_pixel = 32; 319 var->red.offset = 16; 320 var->red.length = 8; 321 var->green.offset = 8; 322 var->green.length = 8; 323 var->blue.offset = 0; 324 var->blue.length = 8; 325 break; 326 327 default: 328 dev_err(sfb->dev, "invalid bpp\n"); 329 return -EINVAL; 330 } 331 332 dev_dbg(sfb->dev, "%s: verified parameters\n", __func__); 333 return 0; 334} 335 336/** 337 * s3c_fb_calc_pixclk() - calculate the divider to create the pixel clock. 338 * @sfb: The hardware state. 339 * @pixclock: The pixel clock wanted, in picoseconds. 340 * 341 * Given the specified pixel clock, work out the necessary divider to get 342 * close to the output frequency. 343 */ 344static int s3c_fb_calc_pixclk(struct s3c_fb *sfb, unsigned int pixclk) 345{ 346 unsigned long clk; 347 unsigned long long tmp; 348 unsigned int result; 349 350 if (sfb->variant.has_clksel) 351 clk = clk_get_rate(sfb->bus_clk); 352 else 353 clk = clk_get_rate(sfb->lcd_clk); 354 355 tmp = (unsigned long long)clk; 356 tmp *= pixclk; 357 358 do_div(tmp, 1000000000UL); 359 result = (unsigned int)tmp / 1000; 360 361 dev_dbg(sfb->dev, "pixclk=%u, clk=%lu, div=%d (%lu)\n", 362 pixclk, clk, result, result ? clk / result : clk); 363 364 return result; 365} 366 367/** 368 * s3c_fb_align_word() - align pixel count to word boundary 369 * @bpp: The number of bits per pixel 370 * @pix: The value to be aligned. 371 * 372 * Align the given pixel count so that it will start on an 32bit word 373 * boundary. 374 */ 375static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) 376{ 377 int pix_per_word; 378 379 if (bpp > 16) 380 return pix; 381 382 pix_per_word = (8 * 32) / bpp; 383 return ALIGN(pix, pix_per_word); 384} 385 386/** 387 * vidosd_set_size() - set OSD size for a window 388 * 389 * @win: the window to set OSD size for 390 * @size: OSD size register value 391 */ 392static void vidosd_set_size(struct s3c_fb_win *win, u32 size) 393{ 394 struct s3c_fb *sfb = win->parent; 395 396 /* OSD can be set up if osd_size_off != 0 for this window */ 397 if (win->variant.osd_size_off) 398 writel(size, sfb->regs + OSD_BASE(win->index, sfb->variant) 399 + win->variant.osd_size_off); 400} 401 402/** 403 * vidosd_set_alpha() - set alpha transparency for a window 404 * 405 * @win: the window to set OSD size for 406 * @alpha: alpha register value 407 */ 408static void vidosd_set_alpha(struct s3c_fb_win *win, u32 alpha) 409{ 410 struct s3c_fb *sfb = win->parent; 411 412 if (win->variant.has_osd_alpha) 413 writel(alpha, sfb->regs + VIDOSD_C(win->index, sfb->variant)); 414} 415 416/** 417 * shadow_protect_win() - disable updating values from shadow registers at vsync 418 * 419 * @win: window to protect registers for 420 * @protect: 1 to protect (disable updates) 421 */ 422static void shadow_protect_win(struct s3c_fb_win *win, bool protect) 423{ 424 struct s3c_fb *sfb = win->parent; 425 u32 reg; 426 427 if (protect) { 428 if (sfb->variant.has_prtcon) { 429 writel(PRTCON_PROTECT, sfb->regs + PRTCON); 430 } else if (sfb->variant.has_shadowcon) { 431 reg = readl(sfb->regs + SHADOWCON); 432 writel(reg | SHADOWCON_WINx_PROTECT(win->index), 433 sfb->regs + SHADOWCON); 434 } 435 } else { 436 if (sfb->variant.has_prtcon) { 437 writel(0, sfb->regs + PRTCON); 438 } else if (sfb->variant.has_shadowcon) { 439 reg = readl(sfb->regs + SHADOWCON); 440 writel(reg & ~SHADOWCON_WINx_PROTECT(win->index), 441 sfb->regs + SHADOWCON); 442 } 443 } 444} 445 446/** 447 * s3c_fb_enable() - Set the state of the main LCD output 448 * @sfb: The main framebuffer state. 449 * @enable: The state to set. 450 */ 451static void s3c_fb_enable(struct s3c_fb *sfb, int enable) 452{ 453 u32 vidcon0 = readl(sfb->regs + VIDCON0); 454 455 if (enable && !sfb->output_on) 456 pm_runtime_get_sync(sfb->dev); 457 458 if (enable) { 459 vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F; 460 } else { 461 /* see the note in the framebuffer datasheet about 462 * why you cannot take both of these bits down at the 463 * same time. */ 464 465 if (vidcon0 & VIDCON0_ENVID) { 466 vidcon0 |= VIDCON0_ENVID; 467 vidcon0 &= ~VIDCON0_ENVID_F; 468 } 469 } 470 471 writel(vidcon0, sfb->regs + VIDCON0); 472 473 if (!enable && sfb->output_on) 474 pm_runtime_put_sync(sfb->dev); 475 476 sfb->output_on = enable; 477} 478 479/** 480 * s3c_fb_set_par() - framebuffer request to set new framebuffer state. 481 * @info: The framebuffer to change. 482 * 483 * Framebuffer layer request to set a new mode for the specified framebuffer 484 */ 485static int s3c_fb_set_par(struct fb_info *info) 486{ 487 struct fb_var_screeninfo *var = &info->var; 488 struct s3c_fb_win *win = info->par; 489 struct s3c_fb *sfb = win->parent; 490 void __iomem *regs = sfb->regs; 491 void __iomem *buf = regs; 492 int win_no = win->index; 493 u32 alpha = 0; 494 u32 data; 495 u32 pagewidth; 496 497 dev_dbg(sfb->dev, "setting framebuffer parameters\n"); 498 499 pm_runtime_get_sync(sfb->dev); 500 501 shadow_protect_win(win, 1); 502 503 switch (var->bits_per_pixel) { 504 case 32: 505 case 24: 506 case 16: 507 case 12: 508 info->fix.visual = FB_VISUAL_TRUECOLOR; 509 break; 510 case 8: 511 if (win->variant.palette_sz >= 256) 512 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 513 else 514 info->fix.visual = FB_VISUAL_TRUECOLOR; 515 break; 516 case 1: 517 info->fix.visual = FB_VISUAL_MONO01; 518 break; 519 default: 520 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 521 break; 522 } 523 524 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; 525 526 info->fix.xpanstep = info->var.xres_virtual > info->var.xres ? 1 : 0; 527 info->fix.ypanstep = info->var.yres_virtual > info->var.yres ? 1 : 0; 528 529 /* disable the window whilst we update it */ 530 writel(0, regs + WINCON(win_no)); 531 532 if (!sfb->output_on) 533 s3c_fb_enable(sfb, 1); 534 535 /* write the buffer address */ 536 537 /* start and end registers stride is 8 */ 538 buf = regs + win_no * 8; 539 540 writel(info->fix.smem_start, buf + sfb->variant.buf_start); 541 542 data = info->fix.smem_start + info->fix.line_length * var->yres; 543 writel(data, buf + sfb->variant.buf_end); 544 545 pagewidth = (var->xres * var->bits_per_pixel) >> 3; 546 data = VIDW_BUF_SIZE_OFFSET(info->fix.line_length - pagewidth) | 547 VIDW_BUF_SIZE_PAGEWIDTH(pagewidth) | 548 VIDW_BUF_SIZE_OFFSET_E(info->fix.line_length - pagewidth) | 549 VIDW_BUF_SIZE_PAGEWIDTH_E(pagewidth); 550 writel(data, regs + sfb->variant.buf_size + (win_no * 4)); 551 552 /* write 'OSD' registers to control position of framebuffer */ 553 554 data = VIDOSDxA_TOPLEFT_X(0) | VIDOSDxA_TOPLEFT_Y(0) | 555 VIDOSDxA_TOPLEFT_X_E(0) | VIDOSDxA_TOPLEFT_Y_E(0); 556 writel(data, regs + VIDOSD_A(win_no, sfb->variant)); 557 558 data = VIDOSDxB_BOTRIGHT_X(s3c_fb_align_word(var->bits_per_pixel, 559 var->xres - 1)) | 560 VIDOSDxB_BOTRIGHT_Y(var->yres - 1) | 561 VIDOSDxB_BOTRIGHT_X_E(s3c_fb_align_word(var->bits_per_pixel, 562 var->xres - 1)) | 563 VIDOSDxB_BOTRIGHT_Y_E(var->yres - 1); 564 565 writel(data, regs + VIDOSD_B(win_no, sfb->variant)); 566 567 data = var->xres * var->yres; 568 569 alpha = VIDISD14C_ALPHA1_R(0xf) | 570 VIDISD14C_ALPHA1_G(0xf) | 571 VIDISD14C_ALPHA1_B(0xf); 572 573 vidosd_set_alpha(win, alpha); 574 vidosd_set_size(win, data); 575 576 /* Enable DMA channel for this window */ 577 if (sfb->variant.has_shadowcon) { 578 data = readl(sfb->regs + SHADOWCON); 579 data |= SHADOWCON_CHx_ENABLE(win_no); 580 writel(data, sfb->regs + SHADOWCON); 581 } 582 583 data = WINCONx_ENWIN; 584 sfb->enabled |= (1 << win->index); 585 586 /* note, since we have to round up the bits-per-pixel, we end up 587 * relying on the bitfield information for r/g/b/a to work out 588 * exactly which mode of operation is intended. */ 589 590 switch (var->bits_per_pixel) { 591 case 1: 592 data |= WINCON0_BPPMODE_1BPP; 593 data |= WINCONx_BITSWP; 594 data |= WINCONx_BURSTLEN_4WORD; 595 break; 596 case 2: 597 data |= WINCON0_BPPMODE_2BPP; 598 data |= WINCONx_BITSWP; 599 data |= WINCONx_BURSTLEN_8WORD; 600 break; 601 case 4: 602 data |= WINCON0_BPPMODE_4BPP; 603 data |= WINCONx_BITSWP; 604 data |= WINCONx_BURSTLEN_8WORD; 605 break; 606 case 8: 607 if (var->transp.length != 0) 608 data |= WINCON1_BPPMODE_8BPP_1232; 609 else 610 data |= WINCON0_BPPMODE_8BPP_PALETTE; 611 data |= WINCONx_BURSTLEN_8WORD; 612 data |= WINCONx_BYTSWP; 613 break; 614 case 16: 615 if (var->transp.length != 0) 616 data |= WINCON1_BPPMODE_16BPP_A1555; 617 else 618 data |= WINCON0_BPPMODE_16BPP_565; 619 data |= WINCONx_HAWSWP; 620 data |= WINCONx_BURSTLEN_16WORD; 621 break; 622 case 24: 623 case 32: 624 if (var->red.length == 6) { 625 if (var->transp.length != 0) 626 data |= WINCON1_BPPMODE_19BPP_A1666; 627 else 628 data |= WINCON1_BPPMODE_18BPP_666; 629 } else if (var->transp.length == 1) 630 data |= WINCON1_BPPMODE_25BPP_A1888 631 | WINCON1_BLD_PIX; 632 else if ((var->transp.length == 4) || 633 (var->transp.length == 8)) 634 data |= WINCON1_BPPMODE_28BPP_A4888 635 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; 636 else 637 data |= WINCON0_BPPMODE_24BPP_888; 638 639 data |= WINCONx_WSWP; 640 data |= WINCONx_BURSTLEN_16WORD; 641 break; 642 } 643 644 /* Enable the colour keying for the window below this one */ 645 if (win_no > 0) { 646 u32 keycon0_data = 0, keycon1_data = 0; 647 void __iomem *keycon = regs + sfb->variant.keycon; 648 649 keycon0_data = ~(WxKEYCON0_KEYBL_EN | 650 WxKEYCON0_KEYEN_F | 651 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0); 652 653 keycon1_data = WxKEYCON1_COLVAL(0xffffff); 654 655 keycon += (win_no - 1) * 8; 656 657 writel(keycon0_data, keycon + WKEYCON0); 658 writel(keycon1_data, keycon + WKEYCON1); 659 } 660 661 writel(data, regs + sfb->variant.wincon + (win_no * 4)); 662 writel(0x0, regs + sfb->variant.winmap + (win_no * 4)); 663 664 /* Set alpha value width */ 665 if (sfb->variant.has_blendcon) { 666 data = readl(sfb->regs + BLENDCON); 667 data &= ~BLENDCON_NEW_MASK; 668 if (var->transp.length > 4) 669 data |= BLENDCON_NEW_8BIT_ALPHA_VALUE; 670 else 671 data |= BLENDCON_NEW_4BIT_ALPHA_VALUE; 672 writel(data, sfb->regs + BLENDCON); 673 } 674 675 shadow_protect_win(win, 0); 676 677 pm_runtime_put_sync(sfb->dev); 678 679 return 0; 680} 681 682/** 683 * s3c_fb_update_palette() - set or schedule a palette update. 684 * @sfb: The hardware information. 685 * @win: The window being updated. 686 * @reg: The palette index being changed. 687 * @value: The computed palette value. 688 * 689 * Change the value of a palette register, either by directly writing to 690 * the palette (this requires the palette RAM to be disconnected from the 691 * hardware whilst this is in progress) or schedule the update for later. 692 * 693 * At the moment, since we have no VSYNC interrupt support, we simply set 694 * the palette entry directly. 695 */ 696static void s3c_fb_update_palette(struct s3c_fb *sfb, 697 struct s3c_fb_win *win, 698 unsigned int reg, 699 u32 value) 700{ 701 void __iomem *palreg; 702 u32 palcon; 703 704 palreg = sfb->regs + sfb->variant.palette[win->index]; 705 706 dev_dbg(sfb->dev, "%s: win %d, reg %d (%p): %08x\n", 707 __func__, win->index, reg, palreg, value); 708 709 win->palette_buffer[reg] = value; 710 711 palcon = readl(sfb->regs + WPALCON); 712 writel(palcon | WPALCON_PAL_UPDATE, sfb->regs + WPALCON); 713 714 if (win->variant.palette_16bpp) 715 writew(value, palreg + (reg * 2)); 716 else 717 writel(value, palreg + (reg * 4)); 718 719 writel(palcon, sfb->regs + WPALCON); 720} 721 722static inline unsigned int chan_to_field(unsigned int chan, 723 struct fb_bitfield *bf) 724{ 725 chan &= 0xffff; 726 chan >>= 16 - bf->length; 727 return chan << bf->offset; 728} 729 730/** 731 * s3c_fb_setcolreg() - framebuffer layer request to change palette. 732 * @regno: The palette index to change. 733 * @red: The red field for the palette data. 734 * @green: The green field for the palette data. 735 * @blue: The blue field for the palette data. 736 * @trans: The transparency (alpha) field for the palette data. 737 * @info: The framebuffer being changed. 738 */ 739static int s3c_fb_setcolreg(unsigned regno, 740 unsigned red, unsigned green, unsigned blue, 741 unsigned transp, struct fb_info *info) 742{ 743 struct s3c_fb_win *win = info->par; 744 struct s3c_fb *sfb = win->parent; 745 unsigned int val; 746 747 dev_dbg(sfb->dev, "%s: win %d: %d => rgb=%d/%d/%d\n", 748 __func__, win->index, regno, red, green, blue); 749 750 pm_runtime_get_sync(sfb->dev); 751 752 switch (info->fix.visual) { 753 case FB_VISUAL_TRUECOLOR: 754 /* true-colour, use pseudo-palette */ 755 756 if (regno < 16) { 757 u32 *pal = info->pseudo_palette; 758 759 val = chan_to_field(red, &info->var.red); 760 val |= chan_to_field(green, &info->var.green); 761 val |= chan_to_field(blue, &info->var.blue); 762 763 pal[regno] = val; 764 } 765 break; 766 767 case FB_VISUAL_PSEUDOCOLOR: 768 if (regno < win->variant.palette_sz) { 769 val = chan_to_field(red, &win->palette.r); 770 val |= chan_to_field(green, &win->palette.g); 771 val |= chan_to_field(blue, &win->palette.b); 772 773 s3c_fb_update_palette(sfb, win, regno, val); 774 } 775 776 break; 777 778 default: 779 pm_runtime_put_sync(sfb->dev); 780 return 1; /* unknown type */ 781 } 782 783 pm_runtime_put_sync(sfb->dev); 784 return 0; 785} 786 787/** 788 * s3c_fb_blank() - blank or unblank the given window 789 * @blank_mode: The blank state from FB_BLANK_* 790 * @info: The framebuffer to blank. 791 * 792 * Framebuffer layer request to change the power state. 793 */ 794static int s3c_fb_blank(int blank_mode, struct fb_info *info) 795{ 796 struct s3c_fb_win *win = info->par; 797 struct s3c_fb *sfb = win->parent; 798 unsigned int index = win->index; 799 u32 wincon; 800 u32 output_on = sfb->output_on; 801 802 dev_dbg(sfb->dev, "blank mode %d\n", blank_mode); 803 804 pm_runtime_get_sync(sfb->dev); 805 806 wincon = readl(sfb->regs + sfb->variant.wincon + (index * 4)); 807 808 switch (blank_mode) { 809 case FB_BLANK_POWERDOWN: 810 wincon &= ~WINCONx_ENWIN; 811 sfb->enabled &= ~(1 << index); 812 fallthrough; /* to FB_BLANK_NORMAL */ 813 814 case FB_BLANK_NORMAL: 815 /* disable the DMA and display 0x0 (black) */ 816 shadow_protect_win(win, 1); 817 writel(WINxMAP_MAP | WINxMAP_MAP_COLOUR(0x0), 818 sfb->regs + sfb->variant.winmap + (index * 4)); 819 shadow_protect_win(win, 0); 820 break; 821 822 case FB_BLANK_UNBLANK: 823 shadow_protect_win(win, 1); 824 writel(0x0, sfb->regs + sfb->variant.winmap + (index * 4)); 825 shadow_protect_win(win, 0); 826 wincon |= WINCONx_ENWIN; 827 sfb->enabled |= (1 << index); 828 break; 829 830 case FB_BLANK_VSYNC_SUSPEND: 831 case FB_BLANK_HSYNC_SUSPEND: 832 default: 833 pm_runtime_put_sync(sfb->dev); 834 return 1; 835 } 836 837 shadow_protect_win(win, 1); 838 writel(wincon, sfb->regs + sfb->variant.wincon + (index * 4)); 839 840 /* Check the enabled state to see if we need to be running the 841 * main LCD interface, as if there are no active windows then 842 * it is highly likely that we also do not need to output 843 * anything. 844 */ 845 s3c_fb_enable(sfb, sfb->enabled ? 1 : 0); 846 shadow_protect_win(win, 0); 847 848 pm_runtime_put_sync(sfb->dev); 849 850 return output_on == sfb->output_on; 851} 852 853/** 854 * s3c_fb_pan_display() - Pan the display. 855 * 856 * Note that the offsets can be written to the device at any time, as their 857 * values are latched at each vsync automatically. This also means that only 858 * the last call to this function will have any effect on next vsync, but 859 * there is no need to sleep waiting for it to prevent tearing. 860 * 861 * @var: The screen information to verify. 862 * @info: The framebuffer device. 863 */ 864static int s3c_fb_pan_display(struct fb_var_screeninfo *var, 865 struct fb_info *info) 866{ 867 struct s3c_fb_win *win = info->par; 868 struct s3c_fb *sfb = win->parent; 869 void __iomem *buf = sfb->regs + win->index * 8; 870 unsigned int start_boff, end_boff; 871 872 pm_runtime_get_sync(sfb->dev); 873 874 /* Offset in bytes to the start of the displayed area */ 875 start_boff = var->yoffset * info->fix.line_length; 876 /* X offset depends on the current bpp */ 877 if (info->var.bits_per_pixel >= 8) { 878 start_boff += var->xoffset * (info->var.bits_per_pixel >> 3); 879 } else { 880 switch (info->var.bits_per_pixel) { 881 case 4: 882 start_boff += var->xoffset >> 1; 883 break; 884 case 2: 885 start_boff += var->xoffset >> 2; 886 break; 887 case 1: 888 start_boff += var->xoffset >> 3; 889 break; 890 default: 891 dev_err(sfb->dev, "invalid bpp\n"); 892 pm_runtime_put_sync(sfb->dev); 893 return -EINVAL; 894 } 895 } 896 /* Offset in bytes to the end of the displayed area */ 897 end_boff = start_boff + info->var.yres * info->fix.line_length; 898 899 /* Temporarily turn off per-vsync update from shadow registers until 900 * both start and end addresses are updated to prevent corruption */ 901 shadow_protect_win(win, 1); 902 903 writel(info->fix.smem_start + start_boff, buf + sfb->variant.buf_start); 904 writel(info->fix.smem_start + end_boff, buf + sfb->variant.buf_end); 905 906 shadow_protect_win(win, 0); 907 908 pm_runtime_put_sync(sfb->dev); 909 return 0; 910} 911 912/** 913 * s3c_fb_enable_irq() - enable framebuffer interrupts 914 * @sfb: main hardware state 915 */ 916static void s3c_fb_enable_irq(struct s3c_fb *sfb) 917{ 918 void __iomem *regs = sfb->regs; 919 u32 irq_ctrl_reg; 920 921 if (!test_and_set_bit(S3C_FB_VSYNC_IRQ_EN, &sfb->irq_flags)) { 922 /* IRQ disabled, enable it */ 923 irq_ctrl_reg = readl(regs + VIDINTCON0); 924 925 irq_ctrl_reg |= VIDINTCON0_INT_ENABLE; 926 irq_ctrl_reg |= VIDINTCON0_INT_FRAME; 927 928 irq_ctrl_reg &= ~VIDINTCON0_FRAMESEL0_MASK; 929 irq_ctrl_reg |= VIDINTCON0_FRAMESEL0_VSYNC; 930 irq_ctrl_reg &= ~VIDINTCON0_FRAMESEL1_MASK; 931 irq_ctrl_reg |= VIDINTCON0_FRAMESEL1_NONE; 932 933 writel(irq_ctrl_reg, regs + VIDINTCON0); 934 } 935} 936 937/** 938 * s3c_fb_disable_irq() - disable framebuffer interrupts 939 * @sfb: main hardware state 940 */ 941static void s3c_fb_disable_irq(struct s3c_fb *sfb) 942{ 943 void __iomem *regs = sfb->regs; 944 u32 irq_ctrl_reg; 945 946 if (test_and_clear_bit(S3C_FB_VSYNC_IRQ_EN, &sfb->irq_flags)) { 947 /* IRQ enabled, disable it */ 948 irq_ctrl_reg = readl(regs + VIDINTCON0); 949 950 irq_ctrl_reg &= ~VIDINTCON0_INT_FRAME; 951 irq_ctrl_reg &= ~VIDINTCON0_INT_ENABLE; 952 953 writel(irq_ctrl_reg, regs + VIDINTCON0); 954 } 955} 956 957static irqreturn_t s3c_fb_irq(int irq, void *dev_id) 958{ 959 struct s3c_fb *sfb = dev_id; 960 void __iomem *regs = sfb->regs; 961 u32 irq_sts_reg; 962 963 spin_lock(&sfb->slock); 964 965 irq_sts_reg = readl(regs + VIDINTCON1); 966 967 if (irq_sts_reg & VIDINTCON1_INT_FRAME) { 968 969 /* VSYNC interrupt, accept it */ 970 writel(VIDINTCON1_INT_FRAME, regs + VIDINTCON1); 971 972 sfb->vsync_info.count++; 973 wake_up_interruptible(&sfb->vsync_info.wait); 974 } 975 976 /* We only support waiting for VSYNC for now, so it's safe 977 * to always disable irqs here. 978 */ 979 s3c_fb_disable_irq(sfb); 980 981 spin_unlock(&sfb->slock); 982 return IRQ_HANDLED; 983} 984 985/** 986 * s3c_fb_wait_for_vsync() - sleep until next VSYNC interrupt or timeout 987 * @sfb: main hardware state 988 * @crtc: head index. 989 */ 990static int s3c_fb_wait_for_vsync(struct s3c_fb *sfb, u32 crtc) 991{ 992 unsigned long count; 993 int ret; 994 995 if (crtc != 0) 996 return -ENODEV; 997 998 pm_runtime_get_sync(sfb->dev); 999 1000 count = sfb->vsync_info.count; 1001 s3c_fb_enable_irq(sfb); 1002 ret = wait_event_interruptible_timeout(sfb->vsync_info.wait, 1003 count != sfb->vsync_info.count, 1004 msecs_to_jiffies(VSYNC_TIMEOUT_MSEC)); 1005 1006 pm_runtime_put_sync(sfb->dev); 1007 1008 if (ret == 0) 1009 return -ETIMEDOUT; 1010 1011 return 0; 1012} 1013 1014static int s3c_fb_ioctl(struct fb_info *info, unsigned int cmd, 1015 unsigned long arg) 1016{ 1017 struct s3c_fb_win *win = info->par; 1018 struct s3c_fb *sfb = win->parent; 1019 int ret; 1020 u32 crtc; 1021 1022 switch (cmd) { 1023 case FBIO_WAITFORVSYNC: 1024 if (get_user(crtc, (u32 __user *)arg)) { 1025 ret = -EFAULT; 1026 break; 1027 } 1028 1029 ret = s3c_fb_wait_for_vsync(sfb, crtc); 1030 break; 1031 default: 1032 ret = -ENOTTY; 1033 } 1034 1035 return ret; 1036} 1037 1038static const struct fb_ops s3c_fb_ops = { 1039 .owner = THIS_MODULE, 1040 .fb_check_var = s3c_fb_check_var, 1041 .fb_set_par = s3c_fb_set_par, 1042 .fb_blank = s3c_fb_blank, 1043 .fb_setcolreg = s3c_fb_setcolreg, 1044 .fb_fillrect = cfb_fillrect, 1045 .fb_copyarea = cfb_copyarea, 1046 .fb_imageblit = cfb_imageblit, 1047 .fb_pan_display = s3c_fb_pan_display, 1048 .fb_ioctl = s3c_fb_ioctl, 1049}; 1050 1051/** 1052 * s3c_fb_missing_pixclock() - calculates pixel clock 1053 * @mode: The video mode to change. 1054 * 1055 * Calculate the pixel clock when none has been given through platform data. 1056 */ 1057static void s3c_fb_missing_pixclock(struct fb_videomode *mode) 1058{ 1059 u64 pixclk = 1000000000000ULL; 1060 u32 div; 1061 1062 div = mode->left_margin + mode->hsync_len + mode->right_margin + 1063 mode->xres; 1064 div *= mode->upper_margin + mode->vsync_len + mode->lower_margin + 1065 mode->yres; 1066 div *= mode->refresh ? : 60; 1067 1068 do_div(pixclk, div); 1069 1070 mode->pixclock = pixclk; 1071} 1072 1073/** 1074 * s3c_fb_alloc_memory() - allocate display memory for framebuffer window 1075 * @sfb: The base resources for the hardware. 1076 * @win: The window to initialise memory for. 1077 * 1078 * Allocate memory for the given framebuffer. 1079 */ 1080static int s3c_fb_alloc_memory(struct s3c_fb *sfb, struct s3c_fb_win *win) 1081{ 1082 struct s3c_fb_pd_win *windata = win->windata; 1083 unsigned int real_size, virt_size, size; 1084 struct fb_info *fbi = win->fbinfo; 1085 dma_addr_t map_dma; 1086 1087 dev_dbg(sfb->dev, "allocating memory for display\n"); 1088 1089 real_size = windata->xres * windata->yres; 1090 virt_size = windata->virtual_x * windata->virtual_y; 1091 1092 dev_dbg(sfb->dev, "real_size=%u (%u.%u), virt_size=%u (%u.%u)\n", 1093 real_size, windata->xres, windata->yres, 1094 virt_size, windata->virtual_x, windata->virtual_y); 1095 1096 size = (real_size > virt_size) ? real_size : virt_size; 1097 size *= (windata->max_bpp > 16) ? 32 : windata->max_bpp; 1098 size /= 8; 1099 1100 fbi->fix.smem_len = size; 1101 size = PAGE_ALIGN(size); 1102 1103 dev_dbg(sfb->dev, "want %u bytes for window\n", size); 1104 1105 fbi->screen_buffer = dma_alloc_wc(sfb->dev, size, &map_dma, GFP_KERNEL); 1106 if (!fbi->screen_buffer) 1107 return -ENOMEM; 1108 1109 dev_dbg(sfb->dev, "mapped %x to %p\n", 1110 (unsigned int)map_dma, fbi->screen_buffer); 1111 1112 memset(fbi->screen_buffer, 0x0, size); 1113 fbi->fix.smem_start = map_dma; 1114 1115 return 0; 1116} 1117 1118/** 1119 * s3c_fb_free_memory() - free the display memory for the given window 1120 * @sfb: The base resources for the hardware. 1121 * @win: The window to free the display memory for. 1122 * 1123 * Free the display memory allocated by s3c_fb_alloc_memory(). 1124 */ 1125static void s3c_fb_free_memory(struct s3c_fb *sfb, struct s3c_fb_win *win) 1126{ 1127 struct fb_info *fbi = win->fbinfo; 1128 1129 if (fbi->screen_buffer) 1130 dma_free_wc(sfb->dev, PAGE_ALIGN(fbi->fix.smem_len), 1131 fbi->screen_buffer, fbi->fix.smem_start); 1132} 1133 1134/** 1135 * s3c_fb_release_win() - release resources for a framebuffer window. 1136 * @win: The window to cleanup the resources for. 1137 * 1138 * Release the resources that where claimed for the hardware window, 1139 * such as the framebuffer instance and any memory claimed for it. 1140 */ 1141static void s3c_fb_release_win(struct s3c_fb *sfb, struct s3c_fb_win *win) 1142{ 1143 u32 data; 1144 1145 if (win->fbinfo) { 1146 if (sfb->variant.has_shadowcon) { 1147 data = readl(sfb->regs + SHADOWCON); 1148 data &= ~SHADOWCON_CHx_ENABLE(win->index); 1149 data &= ~SHADOWCON_CHx_LOCAL_ENABLE(win->index); 1150 writel(data, sfb->regs + SHADOWCON); 1151 } 1152 unregister_framebuffer(win->fbinfo); 1153 if (win->fbinfo->cmap.len) 1154 fb_dealloc_cmap(&win->fbinfo->cmap); 1155 s3c_fb_free_memory(sfb, win); 1156 framebuffer_release(win->fbinfo); 1157 } 1158} 1159 1160/** 1161 * s3c_fb_probe_win() - register an hardware window 1162 * @sfb: The base resources for the hardware 1163 * @variant: The variant information for this window. 1164 * @res: Pointer to where to place the resultant window. 1165 * 1166 * Allocate and do the basic initialisation for one of the hardware's graphics 1167 * windows. 1168 */ 1169static int s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no, 1170 struct s3c_fb_win_variant *variant, 1171 struct s3c_fb_win **res) 1172{ 1173 struct fb_var_screeninfo *var; 1174 struct fb_videomode initmode; 1175 struct s3c_fb_pd_win *windata; 1176 struct s3c_fb_win *win; 1177 struct fb_info *fbinfo; 1178 int palette_size; 1179 int ret; 1180 1181 dev_dbg(sfb->dev, "probing window %d, variant %p\n", win_no, variant); 1182 1183 init_waitqueue_head(&sfb->vsync_info.wait); 1184 1185 palette_size = variant->palette_sz * 4; 1186 1187 fbinfo = framebuffer_alloc(sizeof(struct s3c_fb_win) + 1188 palette_size * sizeof(u32), sfb->dev); 1189 if (!fbinfo) 1190 return -ENOMEM; 1191 1192 windata = sfb->pdata->win[win_no]; 1193 initmode = *sfb->pdata->vtiming; 1194 1195 WARN_ON(windata->max_bpp == 0); 1196 WARN_ON(windata->xres == 0); 1197 WARN_ON(windata->yres == 0); 1198 1199 win = fbinfo->par; 1200 *res = win; 1201 var = &fbinfo->var; 1202 win->variant = *variant; 1203 win->fbinfo = fbinfo; 1204 win->parent = sfb; 1205 win->windata = windata; 1206 win->index = win_no; 1207 win->palette_buffer = (u32 *)(win + 1); 1208 1209 ret = s3c_fb_alloc_memory(sfb, win); 1210 if (ret) { 1211 dev_err(sfb->dev, "failed to allocate display memory\n"); 1212 return ret; 1213 } 1214 1215 /* setup the r/b/g positions for the window's palette */ 1216 if (win->variant.palette_16bpp) { 1217 /* Set RGB 5:6:5 as default */ 1218 win->palette.r.offset = 11; 1219 win->palette.r.length = 5; 1220 win->palette.g.offset = 5; 1221 win->palette.g.length = 6; 1222 win->palette.b.offset = 0; 1223 win->palette.b.length = 5; 1224 1225 } else { 1226 /* Set 8bpp or 8bpp and 1bit alpha */ 1227 win->palette.r.offset = 16; 1228 win->palette.r.length = 8; 1229 win->palette.g.offset = 8; 1230 win->palette.g.length = 8; 1231 win->palette.b.offset = 0; 1232 win->palette.b.length = 8; 1233 } 1234 1235 /* setup the initial video mode from the window */ 1236 initmode.xres = windata->xres; 1237 initmode.yres = windata->yres; 1238 fb_videomode_to_var(&fbinfo->var, &initmode); 1239 1240 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS; 1241 fbinfo->fix.accel = FB_ACCEL_NONE; 1242 fbinfo->var.activate = FB_ACTIVATE_NOW; 1243 fbinfo->var.vmode = FB_VMODE_NONINTERLACED; 1244 fbinfo->var.bits_per_pixel = windata->default_bpp; 1245 fbinfo->fbops = &s3c_fb_ops; 1246 fbinfo->flags = FBINFO_FLAG_DEFAULT; 1247 fbinfo->pseudo_palette = &win->pseudo_palette; 1248 1249 /* prepare to actually start the framebuffer */ 1250 1251 ret = s3c_fb_check_var(&fbinfo->var, fbinfo); 1252 if (ret < 0) { 1253 dev_err(sfb->dev, "check_var failed on initial video params\n"); 1254 return ret; 1255 } 1256 1257 /* create initial colour map */ 1258 1259 ret = fb_alloc_cmap(&fbinfo->cmap, win->variant.palette_sz, 1); 1260 if (ret == 0) 1261 fb_set_cmap(&fbinfo->cmap, fbinfo); 1262 else 1263 dev_err(sfb->dev, "failed to allocate fb cmap\n"); 1264 1265 s3c_fb_set_par(fbinfo); 1266 1267 dev_dbg(sfb->dev, "about to register framebuffer\n"); 1268 1269 /* run the check_var and set_par on our configuration. */ 1270 1271 ret = register_framebuffer(fbinfo); 1272 if (ret < 0) { 1273 dev_err(sfb->dev, "failed to register framebuffer\n"); 1274 return ret; 1275 } 1276 1277 dev_info(sfb->dev, "window %d: fb %s\n", win_no, fbinfo->fix.id); 1278 1279 return 0; 1280} 1281 1282/** 1283 * s3c_fb_set_rgb_timing() - set video timing for rgb interface. 1284 * @sfb: The base resources for the hardware. 1285 * 1286 * Set horizontal and vertical lcd rgb interface timing. 1287 */ 1288static void s3c_fb_set_rgb_timing(struct s3c_fb *sfb) 1289{ 1290 struct fb_videomode *vmode = sfb->pdata->vtiming; 1291 void __iomem *regs = sfb->regs; 1292 int clkdiv; 1293 u32 data; 1294 1295 if (!vmode->pixclock) 1296 s3c_fb_missing_pixclock(vmode); 1297 1298 clkdiv = s3c_fb_calc_pixclk(sfb, vmode->pixclock); 1299 1300 data = sfb->pdata->vidcon0; 1301 data &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR); 1302 1303 if (clkdiv > 1) 1304 data |= VIDCON0_CLKVAL_F(clkdiv-1) | VIDCON0_CLKDIR; 1305 else 1306 data &= ~VIDCON0_CLKDIR; /* 1:1 clock */ 1307 1308 if (sfb->variant.is_2443) 1309 data |= (1 << 5); 1310 writel(data, regs + VIDCON0); 1311 1312 data = VIDTCON0_VBPD(vmode->upper_margin - 1) | 1313 VIDTCON0_VFPD(vmode->lower_margin - 1) | 1314 VIDTCON0_VSPW(vmode->vsync_len - 1); 1315 writel(data, regs + sfb->variant.vidtcon); 1316 1317 data = VIDTCON1_HBPD(vmode->left_margin - 1) | 1318 VIDTCON1_HFPD(vmode->right_margin - 1) | 1319 VIDTCON1_HSPW(vmode->hsync_len - 1); 1320 writel(data, regs + sfb->variant.vidtcon + 4); 1321 1322 data = VIDTCON2_LINEVAL(vmode->yres - 1) | 1323 VIDTCON2_HOZVAL(vmode->xres - 1) | 1324 VIDTCON2_LINEVAL_E(vmode->yres - 1) | 1325 VIDTCON2_HOZVAL_E(vmode->xres - 1); 1326 writel(data, regs + sfb->variant.vidtcon + 8); 1327} 1328 1329/** 1330 * s3c_fb_clear_win() - clear hardware window registers. 1331 * @sfb: The base resources for the hardware. 1332 * @win: The window to process. 1333 * 1334 * Reset the specific window registers to a known state. 1335 */ 1336static void s3c_fb_clear_win(struct s3c_fb *sfb, int win) 1337{ 1338 void __iomem *regs = sfb->regs; 1339 u32 reg; 1340 1341 writel(0, regs + sfb->variant.wincon + (win * 4)); 1342 writel(0, regs + VIDOSD_A(win, sfb->variant)); 1343 writel(0, regs + VIDOSD_B(win, sfb->variant)); 1344 writel(0, regs + VIDOSD_C(win, sfb->variant)); 1345 1346 if (sfb->variant.has_shadowcon) { 1347 reg = readl(sfb->regs + SHADOWCON); 1348 reg &= ~(SHADOWCON_WINx_PROTECT(win) | 1349 SHADOWCON_CHx_ENABLE(win) | 1350 SHADOWCON_CHx_LOCAL_ENABLE(win)); 1351 writel(reg, sfb->regs + SHADOWCON); 1352 } 1353} 1354 1355static int s3c_fb_probe(struct platform_device *pdev) 1356{ 1357 const struct platform_device_id *platid; 1358 struct s3c_fb_driverdata *fbdrv; 1359 struct device *dev = &pdev->dev; 1360 struct s3c_fb_platdata *pd; 1361 struct s3c_fb *sfb; 1362 struct resource *res; 1363 int win; 1364 int ret = 0; 1365 u32 reg; 1366 1367 platid = platform_get_device_id(pdev); 1368 fbdrv = (struct s3c_fb_driverdata *)platid->driver_data; 1369 1370 if (fbdrv->variant.nr_windows > S3C_FB_MAX_WIN) { 1371 dev_err(dev, "too many windows, cannot attach\n"); 1372 return -EINVAL; 1373 } 1374 1375 pd = dev_get_platdata(&pdev->dev); 1376 if (!pd) { 1377 dev_err(dev, "no platform data specified\n"); 1378 return -EINVAL; 1379 } 1380 1381 sfb = devm_kzalloc(dev, sizeof(*sfb), GFP_KERNEL); 1382 if (!sfb) 1383 return -ENOMEM; 1384 1385 dev_dbg(dev, "allocate new framebuffer %p\n", sfb); 1386 1387 sfb->dev = dev; 1388 sfb->pdata = pd; 1389 sfb->variant = fbdrv->variant; 1390 1391 spin_lock_init(&sfb->slock); 1392 1393 sfb->bus_clk = devm_clk_get(dev, "lcd"); 1394 if (IS_ERR(sfb->bus_clk)) { 1395 dev_err(dev, "failed to get bus clock\n"); 1396 return PTR_ERR(sfb->bus_clk); 1397 } 1398 1399 clk_prepare_enable(sfb->bus_clk); 1400 1401 if (!sfb->variant.has_clksel) { 1402 sfb->lcd_clk = devm_clk_get(dev, "sclk_fimd"); 1403 if (IS_ERR(sfb->lcd_clk)) { 1404 dev_err(dev, "failed to get lcd clock\n"); 1405 ret = PTR_ERR(sfb->lcd_clk); 1406 goto err_bus_clk; 1407 } 1408 1409 clk_prepare_enable(sfb->lcd_clk); 1410 } 1411 1412 pm_runtime_enable(sfb->dev); 1413 1414 sfb->regs = devm_platform_ioremap_resource(pdev, 0); 1415 if (IS_ERR(sfb->regs)) { 1416 ret = PTR_ERR(sfb->regs); 1417 goto err_lcd_clk; 1418 } 1419 1420 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 1421 if (!res) { 1422 dev_err(dev, "failed to acquire irq resource\n"); 1423 ret = -ENOENT; 1424 goto err_lcd_clk; 1425 } 1426 sfb->irq_no = res->start; 1427 ret = devm_request_irq(dev, sfb->irq_no, s3c_fb_irq, 1428 0, "s3c_fb", sfb); 1429 if (ret) { 1430 dev_err(dev, "irq request failed\n"); 1431 goto err_lcd_clk; 1432 } 1433 1434 dev_dbg(dev, "got resources (regs %p), probing windows\n", sfb->regs); 1435 1436 platform_set_drvdata(pdev, sfb); 1437 pm_runtime_get_sync(sfb->dev); 1438 1439 /* setup gpio and output polarity controls */ 1440 1441 pd->setup_gpio(); 1442 1443 writel(pd->vidcon1, sfb->regs + VIDCON1); 1444 1445 /* set video clock running at under-run */ 1446 if (sfb->variant.has_fixvclk) { 1447 reg = readl(sfb->regs + VIDCON1); 1448 reg &= ~VIDCON1_VCLK_MASK; 1449 reg |= VIDCON1_VCLK_RUN; 1450 writel(reg, sfb->regs + VIDCON1); 1451 } 1452 1453 /* zero all windows before we do anything */ 1454 1455 for (win = 0; win < fbdrv->variant.nr_windows; win++) 1456 s3c_fb_clear_win(sfb, win); 1457 1458 /* initialise colour key controls */ 1459 for (win = 0; win < (fbdrv->variant.nr_windows - 1); win++) { 1460 void __iomem *regs = sfb->regs + sfb->variant.keycon; 1461 1462 regs += (win * 8); 1463 writel(0xffffff, regs + WKEYCON0); 1464 writel(0xffffff, regs + WKEYCON1); 1465 } 1466 1467 s3c_fb_set_rgb_timing(sfb); 1468 1469 /* we have the register setup, start allocating framebuffers */ 1470 1471 for (win = 0; win < fbdrv->variant.nr_windows; win++) { 1472 if (!pd->win[win]) 1473 continue; 1474 1475 ret = s3c_fb_probe_win(sfb, win, fbdrv->win[win], 1476 &sfb->windows[win]); 1477 if (ret < 0) { 1478 dev_err(dev, "failed to create window %d\n", win); 1479 for (; win >= 0; win--) 1480 s3c_fb_release_win(sfb, sfb->windows[win]); 1481 goto err_pm_runtime; 1482 } 1483 } 1484 1485 platform_set_drvdata(pdev, sfb); 1486 pm_runtime_put_sync(sfb->dev); 1487 1488 return 0; 1489 1490err_pm_runtime: 1491 pm_runtime_put_sync(sfb->dev); 1492 1493err_lcd_clk: 1494 pm_runtime_disable(sfb->dev); 1495 1496 if (!sfb->variant.has_clksel) 1497 clk_disable_unprepare(sfb->lcd_clk); 1498 1499err_bus_clk: 1500 clk_disable_unprepare(sfb->bus_clk); 1501 1502 return ret; 1503} 1504 1505/** 1506 * s3c_fb_remove() - Cleanup on module finalisation 1507 * @pdev: The platform device we are bound to. 1508 * 1509 * Shutdown and then release all the resources that the driver allocated 1510 * on initialisation. 1511 */ 1512static int s3c_fb_remove(struct platform_device *pdev) 1513{ 1514 struct s3c_fb *sfb = platform_get_drvdata(pdev); 1515 int win; 1516 1517 pm_runtime_get_sync(sfb->dev); 1518 1519 for (win = 0; win < S3C_FB_MAX_WIN; win++) 1520 if (sfb->windows[win]) 1521 s3c_fb_release_win(sfb, sfb->windows[win]); 1522 1523 if (!sfb->variant.has_clksel) 1524 clk_disable_unprepare(sfb->lcd_clk); 1525 1526 clk_disable_unprepare(sfb->bus_clk); 1527 1528 pm_runtime_put_sync(sfb->dev); 1529 pm_runtime_disable(sfb->dev); 1530 1531 return 0; 1532} 1533 1534#ifdef CONFIG_PM_SLEEP 1535static int s3c_fb_suspend(struct device *dev) 1536{ 1537 struct s3c_fb *sfb = dev_get_drvdata(dev); 1538 struct s3c_fb_win *win; 1539 int win_no; 1540 1541 pm_runtime_get_sync(sfb->dev); 1542 1543 for (win_no = S3C_FB_MAX_WIN - 1; win_no >= 0; win_no--) { 1544 win = sfb->windows[win_no]; 1545 if (!win) 1546 continue; 1547 1548 /* use the blank function to push into power-down */ 1549 s3c_fb_blank(FB_BLANK_POWERDOWN, win->fbinfo); 1550 } 1551 1552 if (!sfb->variant.has_clksel) 1553 clk_disable_unprepare(sfb->lcd_clk); 1554 1555 clk_disable_unprepare(sfb->bus_clk); 1556 1557 pm_runtime_put_sync(sfb->dev); 1558 1559 return 0; 1560} 1561 1562static int s3c_fb_resume(struct device *dev) 1563{ 1564 struct s3c_fb *sfb = dev_get_drvdata(dev); 1565 struct s3c_fb_platdata *pd = sfb->pdata; 1566 struct s3c_fb_win *win; 1567 int win_no; 1568 u32 reg; 1569 1570 pm_runtime_get_sync(sfb->dev); 1571 1572 clk_prepare_enable(sfb->bus_clk); 1573 1574 if (!sfb->variant.has_clksel) 1575 clk_prepare_enable(sfb->lcd_clk); 1576 1577 /* setup gpio and output polarity controls */ 1578 pd->setup_gpio(); 1579 writel(pd->vidcon1, sfb->regs + VIDCON1); 1580 1581 /* set video clock running at under-run */ 1582 if (sfb->variant.has_fixvclk) { 1583 reg = readl(sfb->regs + VIDCON1); 1584 reg &= ~VIDCON1_VCLK_MASK; 1585 reg |= VIDCON1_VCLK_RUN; 1586 writel(reg, sfb->regs + VIDCON1); 1587 } 1588 1589 /* zero all windows before we do anything */ 1590 for (win_no = 0; win_no < sfb->variant.nr_windows; win_no++) 1591 s3c_fb_clear_win(sfb, win_no); 1592 1593 for (win_no = 0; win_no < sfb->variant.nr_windows - 1; win_no++) { 1594 void __iomem *regs = sfb->regs + sfb->variant.keycon; 1595 win = sfb->windows[win_no]; 1596 if (!win) 1597 continue; 1598 1599 shadow_protect_win(win, 1); 1600 regs += (win_no * 8); 1601 writel(0xffffff, regs + WKEYCON0); 1602 writel(0xffffff, regs + WKEYCON1); 1603 shadow_protect_win(win, 0); 1604 } 1605 1606 s3c_fb_set_rgb_timing(sfb); 1607 1608 /* restore framebuffers */ 1609 for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) { 1610 win = sfb->windows[win_no]; 1611 if (!win) 1612 continue; 1613 1614 dev_dbg(dev, "resuming window %d\n", win_no); 1615 s3c_fb_set_par(win->fbinfo); 1616 } 1617 1618 pm_runtime_put_sync(sfb->dev); 1619 1620 return 0; 1621} 1622#endif 1623 1624#ifdef CONFIG_PM 1625static int s3c_fb_runtime_suspend(struct device *dev) 1626{ 1627 struct s3c_fb *sfb = dev_get_drvdata(dev); 1628 1629 if (!sfb->variant.has_clksel) 1630 clk_disable_unprepare(sfb->lcd_clk); 1631 1632 clk_disable_unprepare(sfb->bus_clk); 1633 1634 return 0; 1635} 1636 1637static int s3c_fb_runtime_resume(struct device *dev) 1638{ 1639 struct s3c_fb *sfb = dev_get_drvdata(dev); 1640 struct s3c_fb_platdata *pd = sfb->pdata; 1641 1642 clk_prepare_enable(sfb->bus_clk); 1643 1644 if (!sfb->variant.has_clksel) 1645 clk_prepare_enable(sfb->lcd_clk); 1646 1647 /* setup gpio and output polarity controls */ 1648 pd->setup_gpio(); 1649 writel(pd->vidcon1, sfb->regs + VIDCON1); 1650 1651 return 0; 1652} 1653#endif 1654 1655#define VALID_BPP124 (VALID_BPP(1) | VALID_BPP(2) | VALID_BPP(4)) 1656#define VALID_BPP1248 (VALID_BPP124 | VALID_BPP(8)) 1657 1658static struct s3c_fb_win_variant s3c_fb_data_64xx_wins[] = { 1659 [0] = { 1660 .has_osd_c = 1, 1661 .osd_size_off = 0x8, 1662 .palette_sz = 256, 1663 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1664 VALID_BPP(18) | VALID_BPP(24)), 1665 }, 1666 [1] = { 1667 .has_osd_c = 1, 1668 .has_osd_d = 1, 1669 .osd_size_off = 0xc, 1670 .has_osd_alpha = 1, 1671 .palette_sz = 256, 1672 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1673 VALID_BPP(18) | VALID_BPP(19) | 1674 VALID_BPP(24) | VALID_BPP(25) | 1675 VALID_BPP(28)), 1676 }, 1677 [2] = { 1678 .has_osd_c = 1, 1679 .has_osd_d = 1, 1680 .osd_size_off = 0xc, 1681 .has_osd_alpha = 1, 1682 .palette_sz = 16, 1683 .palette_16bpp = 1, 1684 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1685 VALID_BPP(18) | VALID_BPP(19) | 1686 VALID_BPP(24) | VALID_BPP(25) | 1687 VALID_BPP(28)), 1688 }, 1689 [3] = { 1690 .has_osd_c = 1, 1691 .has_osd_alpha = 1, 1692 .palette_sz = 16, 1693 .palette_16bpp = 1, 1694 .valid_bpp = (VALID_BPP124 | VALID_BPP(16) | 1695 VALID_BPP(18) | VALID_BPP(19) | 1696 VALID_BPP(24) | VALID_BPP(25) | 1697 VALID_BPP(28)), 1698 }, 1699 [4] = { 1700 .has_osd_c = 1, 1701 .has_osd_alpha = 1, 1702 .palette_sz = 4, 1703 .palette_16bpp = 1, 1704 .valid_bpp = (VALID_BPP(1) | VALID_BPP(2) | 1705 VALID_BPP(16) | VALID_BPP(18) | 1706 VALID_BPP(19) | VALID_BPP(24) | 1707 VALID_BPP(25) | VALID_BPP(28)), 1708 }, 1709}; 1710 1711static struct s3c_fb_driverdata s3c_fb_data_64xx = { 1712 .variant = { 1713 .nr_windows = 5, 1714 .vidtcon = VIDTCON0, 1715 .wincon = WINCON(0), 1716 .winmap = WINxMAP(0), 1717 .keycon = WKEYCON, 1718 .osd = VIDOSD_BASE, 1719 .osd_stride = 16, 1720 .buf_start = VIDW_BUF_START(0), 1721 .buf_size = VIDW_BUF_SIZE(0), 1722 .buf_end = VIDW_BUF_END(0), 1723 1724 .palette = { 1725 [0] = 0x400, 1726 [1] = 0x800, 1727 [2] = 0x300, 1728 [3] = 0x320, 1729 [4] = 0x340, 1730 }, 1731 1732 .has_prtcon = 1, 1733 .has_clksel = 1, 1734 }, 1735 .win[0] = &s3c_fb_data_64xx_wins[0], 1736 .win[1] = &s3c_fb_data_64xx_wins[1], 1737 .win[2] = &s3c_fb_data_64xx_wins[2], 1738 .win[3] = &s3c_fb_data_64xx_wins[3], 1739 .win[4] = &s3c_fb_data_64xx_wins[4], 1740}; 1741 1742/* S3C2443/S3C2416 style hardware */ 1743static struct s3c_fb_driverdata s3c_fb_data_s3c2443 = { 1744 .variant = { 1745 .nr_windows = 2, 1746 .is_2443 = 1, 1747 1748 .vidtcon = 0x08, 1749 .wincon = 0x14, 1750 .winmap = 0xd0, 1751 .keycon = 0xb0, 1752 .osd = 0x28, 1753 .osd_stride = 12, 1754 .buf_start = 0x64, 1755 .buf_size = 0x94, 1756 .buf_end = 0x7c, 1757 1758 .palette = { 1759 [0] = 0x400, 1760 [1] = 0x800, 1761 }, 1762 .has_clksel = 1, 1763 }, 1764 .win[0] = &(struct s3c_fb_win_variant) { 1765 .palette_sz = 256, 1766 .valid_bpp = VALID_BPP1248 | VALID_BPP(16) | VALID_BPP(24), 1767 }, 1768 .win[1] = &(struct s3c_fb_win_variant) { 1769 .has_osd_c = 1, 1770 .has_osd_alpha = 1, 1771 .palette_sz = 256, 1772 .valid_bpp = (VALID_BPP1248 | VALID_BPP(16) | 1773 VALID_BPP(18) | VALID_BPP(19) | 1774 VALID_BPP(24) | VALID_BPP(25) | 1775 VALID_BPP(28)), 1776 }, 1777}; 1778 1779static const struct platform_device_id s3c_fb_driver_ids[] = { 1780 { 1781 .name = "s3c-fb", 1782 .driver_data = (unsigned long)&s3c_fb_data_64xx, 1783 }, { 1784 .name = "s3c2443-fb", 1785 .driver_data = (unsigned long)&s3c_fb_data_s3c2443, 1786 }, 1787 {}, 1788}; 1789MODULE_DEVICE_TABLE(platform, s3c_fb_driver_ids); 1790 1791static const struct dev_pm_ops s3cfb_pm_ops = { 1792 SET_SYSTEM_SLEEP_PM_OPS(s3c_fb_suspend, s3c_fb_resume) 1793 SET_RUNTIME_PM_OPS(s3c_fb_runtime_suspend, s3c_fb_runtime_resume, 1794 NULL) 1795}; 1796 1797static struct platform_driver s3c_fb_driver = { 1798 .probe = s3c_fb_probe, 1799 .remove = s3c_fb_remove, 1800 .id_table = s3c_fb_driver_ids, 1801 .driver = { 1802 .name = "s3c-fb", 1803 .pm = &s3cfb_pm_ops, 1804 }, 1805}; 1806 1807module_platform_driver(s3c_fb_driver); 1808 1809MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); 1810MODULE_DESCRIPTION("Samsung S3C SoC Framebuffer driver"); 1811MODULE_LICENSE("GPL"); 1812MODULE_ALIAS("platform:s3c-fb"); 1813