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 to get platform specific data 39 * has been replaced by using the platform device name to pick the correct 40 * configuration data for the system. 41*/ 42 43#ifdef CONFIG_FB_S3C_DEBUG_REGWRITE 44#undef writel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