1/* 2 * linux/drivers/video/pxafb.c 3 * 4 * Copyright (C) 1999 Eric A. Thomas. 5 * Copyright (C) 2004 Jean-Frederic Clere. 6 * Copyright (C) 2004 Ian Campbell. 7 * Copyright (C) 2004 Jeff Lackey. 8 * Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas 9 * which in turn is 10 * Based on acornfb.c Copyright (C) Russell King. 11 * 12 * This file is subject to the terms and conditions of the GNU General Public 13 * License. See the file COPYING in the main directory of this archive for 14 * more details. 15 * 16 * Intel PXA250/210 LCD Controller Frame Buffer Driver 17 * 18 * Please direct your questions and comments on this driver to the following 19 * email address: 20 * 21 * linux-arm-kernel@lists.arm.linux.org.uk 22 * 23 * Add support for overlay1 and overlay2 based on pxafb_overlay.c: 24 * 25 * Copyright (C) 2004, Intel Corporation 26 * 27 * 2003/08/27: <yu.tang@intel.com> 28 * 2004/03/10: <stanley.cai@intel.com> 29 * 2004/10/28: <yan.yin@intel.com> 30 * 31 * Copyright (C) 2006-2008 Marvell International Ltd. 32 * All Rights Reserved 33 */ 34 35#include <linux/module.h> 36#include <linux/moduleparam.h> 37#include <linux/kernel.h> 38#include <linux/sched.h> 39#include <linux/errno.h> 40#include <linux/string.h> 41#include <linux/interrupt.h> 42#include <linux/slab.h> 43#include <linux/mm.h> 44#include <linux/fb.h> 45#include <linux/delay.h> 46#include <linux/init.h> 47#include <linux/ioport.h> 48#include <linux/cpufreq.h> 49#include <linux/platform_device.h> 50#include <linux/dma-mapping.h> 51#include <linux/clk.h> 52#include <linux/err.h> 53#include <linux/completion.h> 54#include <linux/mutex.h> 55#include <linux/kthread.h> 56#include <linux/freezer.h> 57#include <linux/console.h> 58#include <linux/of_graph.h> 59#include <linux/regulator/consumer.h> 60#include <linux/soc/pxa/cpu.h> 61#include <video/of_display_timing.h> 62#include <video/videomode.h> 63 64#include <asm/io.h> 65#include <asm/irq.h> 66#include <asm/div64.h> 67#include <linux/platform_data/video-pxafb.h> 68 69/* 70 * Complain if VAR is out of range. 71 */ 72#define DEBUG_VAR 1 73 74#include "pxafb.h" 75#include "pxa3xx-regs.h" 76 77/* Bits which should not be set in machine configuration structures */ 78#define LCCR0_INVALID_CONFIG_MASK (LCCR0_OUM | LCCR0_BM | LCCR0_QDM |\ 79 LCCR0_DIS | LCCR0_EFM | LCCR0_IUM |\ 80 LCCR0_SFM | LCCR0_LDM | LCCR0_ENB) 81 82#define LCCR3_INVALID_CONFIG_MASK (LCCR3_HSP | LCCR3_VSP |\ 83 LCCR3_PCD | LCCR3_BPP(0xf)) 84 85static int pxafb_activate_var(struct fb_var_screeninfo *var, 86 struct pxafb_info *); 87static void set_ctrlr_state(struct pxafb_info *fbi, u_int state); 88static void setup_base_frame(struct pxafb_info *fbi, 89 struct fb_var_screeninfo *var, int branch); 90static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal, 91 unsigned long offset, size_t size); 92 93static unsigned long video_mem_size = 0; 94 95static inline unsigned long 96lcd_readl(struct pxafb_info *fbi, unsigned int off) 97{ 98 return __raw_readl(fbi->mmio_base + off); 99} 100 101static inline void 102lcd_writel(struct pxafb_info *fbi, unsigned int off, unsigned long val) 103{ 104 __raw_writel(val, fbi->mmio_base + off); 105} 106 107static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state) 108{ 109 unsigned long flags; 110 111 local_irq_save(flags); 112 /* 113 * We need to handle two requests being made at the same time. 114 * There are two important cases: 115 * 1. When we are changing VT (C_REENABLE) while unblanking 116 * (C_ENABLE) We must perform the unblanking, which will 117 * do our REENABLE for us. 118 * 2. When we are blanking, but immediately unblank before 119 * we have blanked. We do the "REENABLE" thing here as 120 * well, just to be sure. 121 */ 122 if (fbi->task_state == C_ENABLE && state == C_REENABLE) 123 state = (u_int) -1; 124 if (fbi->task_state == C_DISABLE && state == C_ENABLE) 125 state = C_REENABLE; 126 127 if (state != (u_int)-1) { 128 fbi->task_state = state; 129 schedule_work(&fbi->task); 130 } 131 local_irq_restore(flags); 132} 133 134static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) 135{ 136 chan &= 0xffff; 137 chan >>= 16 - bf->length; 138 return chan << bf->offset; 139} 140 141static int 142pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue, 143 u_int trans, struct fb_info *info) 144{ 145 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 146 u_int val; 147 148 if (regno >= fbi->palette_size) 149 return 1; 150 151 if (fbi->fb.var.grayscale) { 152 fbi->palette_cpu[regno] = ((blue >> 8) & 0x00ff); 153 return 0; 154 } 155 156 switch (fbi->lccr4 & LCCR4_PAL_FOR_MASK) { 157 case LCCR4_PAL_FOR_0: 158 val = ((red >> 0) & 0xf800); 159 val |= ((green >> 5) & 0x07e0); 160 val |= ((blue >> 11) & 0x001f); 161 fbi->palette_cpu[regno] = val; 162 break; 163 case LCCR4_PAL_FOR_1: 164 val = ((red << 8) & 0x00f80000); 165 val |= ((green >> 0) & 0x0000fc00); 166 val |= ((blue >> 8) & 0x000000f8); 167 ((u32 *)(fbi->palette_cpu))[regno] = val; 168 break; 169 case LCCR4_PAL_FOR_2: 170 val = ((red << 8) & 0x00fc0000); 171 val |= ((green >> 0) & 0x0000fc00); 172 val |= ((blue >> 8) & 0x000000fc); 173 ((u32 *)(fbi->palette_cpu))[regno] = val; 174 break; 175 case LCCR4_PAL_FOR_3: 176 val = ((red << 8) & 0x00ff0000); 177 val |= ((green >> 0) & 0x0000ff00); 178 val |= ((blue >> 8) & 0x000000ff); 179 ((u32 *)(fbi->palette_cpu))[regno] = val; 180 break; 181 } 182 183 return 0; 184} 185 186static int 187pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, 188 u_int trans, struct fb_info *info) 189{ 190 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 191 unsigned int val; 192 int ret = 1; 193 194 /* 195 * If inverse mode was selected, invert all the colours 196 * rather than the register number. The register number 197 * is what you poke into the framebuffer to produce the 198 * colour you requested. 199 */ 200 if (fbi->cmap_inverse) { 201 red = 0xffff - red; 202 green = 0xffff - green; 203 blue = 0xffff - blue; 204 } 205 206 /* 207 * If greyscale is true, then we convert the RGB value 208 * to greyscale no matter what visual we are using. 209 */ 210 if (fbi->fb.var.grayscale) 211 red = green = blue = (19595 * red + 38470 * green + 212 7471 * blue) >> 16; 213 214 switch (fbi->fb.fix.visual) { 215 case FB_VISUAL_TRUECOLOR: 216 /* 217 * 16-bit True Colour. We encode the RGB value 218 * according to the RGB bitfield information. 219 */ 220 if (regno < 16) { 221 u32 *pal = fbi->fb.pseudo_palette; 222 223 val = chan_to_field(red, &fbi->fb.var.red); 224 val |= chan_to_field(green, &fbi->fb.var.green); 225 val |= chan_to_field(blue, &fbi->fb.var.blue); 226 227 pal[regno] = val; 228 ret = 0; 229 } 230 break; 231 232 case FB_VISUAL_STATIC_PSEUDOCOLOR: 233 case FB_VISUAL_PSEUDOCOLOR: 234 ret = pxafb_setpalettereg(regno, red, green, blue, trans, info); 235 break; 236 } 237 238 return ret; 239} 240 241/* calculate pixel depth, transparency bit included, >=16bpp formats _only_ */ 242static inline int var_to_depth(struct fb_var_screeninfo *var) 243{ 244 return var->red.length + var->green.length + 245 var->blue.length + var->transp.length; 246} 247 248/* calculate 4-bit BPP value for LCCR3 and OVLxC1 */ 249static int pxafb_var_to_bpp(struct fb_var_screeninfo *var) 250{ 251 int bpp = -EINVAL; 252 253 switch (var->bits_per_pixel) { 254 case 1: bpp = 0; break; 255 case 2: bpp = 1; break; 256 case 4: bpp = 2; break; 257 case 8: bpp = 3; break; 258 case 16: bpp = 4; break; 259 case 24: 260 switch (var_to_depth(var)) { 261 case 18: bpp = 6; break; /* 18-bits/pixel packed */ 262 case 19: bpp = 8; break; /* 19-bits/pixel packed */ 263 case 24: bpp = 9; break; 264 } 265 break; 266 case 32: 267 switch (var_to_depth(var)) { 268 case 18: bpp = 5; break; /* 18-bits/pixel unpacked */ 269 case 19: bpp = 7; break; /* 19-bits/pixel unpacked */ 270 case 25: bpp = 10; break; 271 } 272 break; 273 } 274 return bpp; 275} 276 277/* 278 * pxafb_var_to_lccr3(): 279 * Convert a bits per pixel value to the correct bit pattern for LCCR3 280 * 281 * NOTE: for PXA27x with overlays support, the LCCR3_PDFOR_x bits have an 282 * implication of the acutal use of transparency bit, which we handle it 283 * here separatedly. See PXA27x Developer's Manual, Section <<7.4.6 Pixel 284 * Formats>> for the valid combination of PDFOR, PAL_FOR for various BPP. 285 * 286 * Transparency for palette pixel formats is not supported at the moment. 287 */ 288static uint32_t pxafb_var_to_lccr3(struct fb_var_screeninfo *var) 289{ 290 int bpp = pxafb_var_to_bpp(var); 291 uint32_t lccr3; 292 293 if (bpp < 0) 294 return 0; 295 296 lccr3 = LCCR3_BPP(bpp); 297 298 switch (var_to_depth(var)) { 299 case 16: lccr3 |= var->transp.length ? LCCR3_PDFOR_3 : 0; break; 300 case 18: lccr3 |= LCCR3_PDFOR_3; break; 301 case 24: lccr3 |= var->transp.length ? LCCR3_PDFOR_2 : LCCR3_PDFOR_3; 302 break; 303 case 19: 304 case 25: lccr3 |= LCCR3_PDFOR_0; break; 305 } 306 return lccr3; 307} 308 309#define SET_PIXFMT(v, r, g, b, t) \ 310({ \ 311 (v)->transp.offset = (t) ? (r) + (g) + (b) : 0; \ 312 (v)->transp.length = (t) ? (t) : 0; \ 313 (v)->blue.length = (b); (v)->blue.offset = 0; \ 314 (v)->green.length = (g); (v)->green.offset = (b); \ 315 (v)->red.length = (r); (v)->red.offset = (b) + (g); \ 316}) 317 318/* set the RGBT bitfields of fb_var_screeninf according to 319 * var->bits_per_pixel and given depth 320 */ 321static void pxafb_set_pixfmt(struct fb_var_screeninfo *var, int depth) 322{ 323 if (depth == 0) 324 depth = var->bits_per_pixel; 325 326 if (var->bits_per_pixel < 16) { 327 /* indexed pixel formats */ 328 var->red.offset = 0; var->red.length = 8; 329 var->green.offset = 0; var->green.length = 8; 330 var->blue.offset = 0; var->blue.length = 8; 331 var->transp.offset = 0; var->transp.length = 8; 332 } 333 334 switch (depth) { 335 case 16: var->transp.length ? 336 SET_PIXFMT(var, 5, 5, 5, 1) : /* RGBT555 */ 337 SET_PIXFMT(var, 5, 6, 5, 0); break; /* RGB565 */ 338 case 18: SET_PIXFMT(var, 6, 6, 6, 0); break; /* RGB666 */ 339 case 19: SET_PIXFMT(var, 6, 6, 6, 1); break; /* RGBT666 */ 340 case 24: var->transp.length ? 341 SET_PIXFMT(var, 8, 8, 7, 1) : /* RGBT887 */ 342 SET_PIXFMT(var, 8, 8, 8, 0); break; /* RGB888 */ 343 case 25: SET_PIXFMT(var, 8, 8, 8, 1); break; /* RGBT888 */ 344 } 345} 346 347#ifdef CONFIG_CPU_FREQ 348/* 349 * pxafb_display_dma_period() 350 * Calculate the minimum period (in picoseconds) between two DMA 351 * requests for the LCD controller. If we hit this, it means we're 352 * doing nothing but LCD DMA. 353 */ 354static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var) 355{ 356 /* 357 * Period = pixclock * bits_per_byte * bytes_per_transfer 358 * / memory_bits_per_pixel; 359 */ 360 return var->pixclock * 8 * 16 / var->bits_per_pixel; 361} 362#endif 363 364/* 365 * Select the smallest mode that allows the desired resolution to be 366 * displayed. If desired parameters can be rounded up. 367 */ 368static struct pxafb_mode_info *pxafb_getmode(struct pxafb_mach_info *mach, 369 struct fb_var_screeninfo *var) 370{ 371 struct pxafb_mode_info *mode = NULL; 372 struct pxafb_mode_info *modelist = mach->modes; 373 unsigned int best_x = 0xffffffff, best_y = 0xffffffff; 374 unsigned int i; 375 376 for (i = 0; i < mach->num_modes; i++) { 377 if (modelist[i].xres >= var->xres && 378 modelist[i].yres >= var->yres && 379 modelist[i].xres < best_x && 380 modelist[i].yres < best_y && 381 modelist[i].bpp >= var->bits_per_pixel) { 382 best_x = modelist[i].xres; 383 best_y = modelist[i].yres; 384 mode = &modelist[i]; 385 } 386 } 387 388 return mode; 389} 390 391static void pxafb_setmode(struct fb_var_screeninfo *var, 392 struct pxafb_mode_info *mode) 393{ 394 var->xres = mode->xres; 395 var->yres = mode->yres; 396 var->bits_per_pixel = mode->bpp; 397 var->pixclock = mode->pixclock; 398 var->hsync_len = mode->hsync_len; 399 var->left_margin = mode->left_margin; 400 var->right_margin = mode->right_margin; 401 var->vsync_len = mode->vsync_len; 402 var->upper_margin = mode->upper_margin; 403 var->lower_margin = mode->lower_margin; 404 var->sync = mode->sync; 405 var->grayscale = mode->cmap_greyscale; 406 var->transp.length = mode->transparency; 407 408 /* set the initial RGBA bitfields */ 409 pxafb_set_pixfmt(var, mode->depth); 410} 411 412static int pxafb_adjust_timing(struct pxafb_info *fbi, 413 struct fb_var_screeninfo *var) 414{ 415 int line_length; 416 417 var->xres = max_t(int, var->xres, MIN_XRES); 418 var->yres = max_t(int, var->yres, MIN_YRES); 419 420 if (!(fbi->lccr0 & LCCR0_LCDT)) { 421 clamp_val(var->hsync_len, 1, 64); 422 clamp_val(var->vsync_len, 1, 64); 423 clamp_val(var->left_margin, 1, 255); 424 clamp_val(var->right_margin, 1, 255); 425 clamp_val(var->upper_margin, 1, 255); 426 clamp_val(var->lower_margin, 1, 255); 427 } 428 429 /* make sure each line is aligned on word boundary */ 430 line_length = var->xres * var->bits_per_pixel / 8; 431 line_length = ALIGN(line_length, 4); 432 var->xres = line_length * 8 / var->bits_per_pixel; 433 434 /* we don't support xpan, force xres_virtual to be equal to xres */ 435 var->xres_virtual = var->xres; 436 437 if (var->accel_flags & FB_ACCELF_TEXT) 438 var->yres_virtual = fbi->fb.fix.smem_len / line_length; 439 else 440 var->yres_virtual = max(var->yres_virtual, var->yres); 441 442 /* check for limits */ 443 if (var->xres > MAX_XRES || var->yres > MAX_YRES) 444 return -EINVAL; 445 446 if (var->yres > var->yres_virtual) 447 return -EINVAL; 448 449 return 0; 450} 451 452/* 453 * pxafb_check_var(): 454 * Get the video params out of 'var'. If a value doesn't fit, round it up, 455 * if it's too big, return -EINVAL. 456 * 457 * Round up in the following order: bits_per_pixel, xres, 458 * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale, 459 * bitfields, horizontal timing, vertical timing. 460 */ 461static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 462{ 463 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 464 struct pxafb_mach_info *inf = fbi->inf; 465 int err; 466 467 if (inf->fixed_modes) { 468 struct pxafb_mode_info *mode; 469 470 mode = pxafb_getmode(inf, var); 471 if (!mode) 472 return -EINVAL; 473 pxafb_setmode(var, mode); 474 } 475 476 /* do a test conversion to BPP fields to check the color formats */ 477 err = pxafb_var_to_bpp(var); 478 if (err < 0) 479 return err; 480 481 pxafb_set_pixfmt(var, var_to_depth(var)); 482 483 err = pxafb_adjust_timing(fbi, var); 484 if (err) 485 return err; 486 487#ifdef CONFIG_CPU_FREQ 488 pr_debug("pxafb: dma period = %d ps\n", 489 pxafb_display_dma_period(var)); 490#endif 491 492 return 0; 493} 494 495/* 496 * pxafb_set_par(): 497 * Set the user defined part of the display for the specified console 498 */ 499static int pxafb_set_par(struct fb_info *info) 500{ 501 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 502 struct fb_var_screeninfo *var = &info->var; 503 504 if (var->bits_per_pixel >= 16) 505 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR; 506 else if (!fbi->cmap_static) 507 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR; 508 else { 509 /* 510 * Some people have weird ideas about wanting static 511 * pseudocolor maps. I suspect their user space 512 * applications are broken. 513 */ 514 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; 515 } 516 517 fbi->fb.fix.line_length = var->xres_virtual * 518 var->bits_per_pixel / 8; 519 if (var->bits_per_pixel >= 16) 520 fbi->palette_size = 0; 521 else 522 fbi->palette_size = var->bits_per_pixel == 1 ? 523 4 : 1 << var->bits_per_pixel; 524 525 fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0]; 526 527 if (fbi->fb.var.bits_per_pixel >= 16) 528 fb_dealloc_cmap(&fbi->fb.cmap); 529 else 530 fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0); 531 532 pxafb_activate_var(var, fbi); 533 534 return 0; 535} 536 537static int pxafb_pan_display(struct fb_var_screeninfo *var, 538 struct fb_info *info) 539{ 540 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 541 struct fb_var_screeninfo newvar; 542 int dma = DMA_MAX + DMA_BASE; 543 544 if (fbi->state != C_ENABLE) 545 return 0; 546 547 /* Only take .xoffset, .yoffset and .vmode & FB_VMODE_YWRAP from what 548 * was passed in and copy the rest from the old screeninfo. 549 */ 550 memcpy(&newvar, &fbi->fb.var, sizeof(newvar)); 551 newvar.xoffset = var->xoffset; 552 newvar.yoffset = var->yoffset; 553 newvar.vmode &= ~FB_VMODE_YWRAP; 554 newvar.vmode |= var->vmode & FB_VMODE_YWRAP; 555 556 setup_base_frame(fbi, &newvar, 1); 557 558 if (fbi->lccr0 & LCCR0_SDS) 559 lcd_writel(fbi, FBR1, fbi->fdadr[dma + 1] | 0x1); 560 561 lcd_writel(fbi, FBR0, fbi->fdadr[dma] | 0x1); 562 return 0; 563} 564 565/* 566 * pxafb_blank(): 567 * Blank the display by setting all palette values to zero. Note, the 568 * 16 bpp mode does not really use the palette, so this will not 569 * blank the display in all modes. 570 */ 571static int pxafb_blank(int blank, struct fb_info *info) 572{ 573 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 574 int i; 575 576 switch (blank) { 577 case FB_BLANK_POWERDOWN: 578 case FB_BLANK_VSYNC_SUSPEND: 579 case FB_BLANK_HSYNC_SUSPEND: 580 case FB_BLANK_NORMAL: 581 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR || 582 fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR) 583 for (i = 0; i < fbi->palette_size; i++) 584 pxafb_setpalettereg(i, 0, 0, 0, 0, info); 585 586 pxafb_schedule_work(fbi, C_DISABLE); 587 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */ 588 break; 589 590 case FB_BLANK_UNBLANK: 591 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */ 592 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR || 593 fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR) 594 fb_set_cmap(&fbi->fb.cmap, info); 595 pxafb_schedule_work(fbi, C_ENABLE); 596 } 597 return 0; 598} 599 600static const struct fb_ops pxafb_ops = { 601 .owner = THIS_MODULE, 602 FB_DEFAULT_IOMEM_OPS, 603 .fb_check_var = pxafb_check_var, 604 .fb_set_par = pxafb_set_par, 605 .fb_pan_display = pxafb_pan_display, 606 .fb_setcolreg = pxafb_setcolreg, 607 .fb_blank = pxafb_blank, 608}; 609 610#ifdef CONFIG_FB_PXA_OVERLAY 611static void overlay1fb_setup(struct pxafb_layer *ofb) 612{ 613 int size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual; 614 unsigned long start = ofb->video_mem_phys; 615 setup_frame_dma(ofb->fbi, DMA_OV1, PAL_NONE, start, size); 616} 617 618/* Depending on the enable status of overlay1/2, the DMA should be 619 * updated from FDADRx (when disabled) or FBRx (when enabled). 620 */ 621static void overlay1fb_enable(struct pxafb_layer *ofb) 622{ 623 int enabled = lcd_readl(ofb->fbi, OVL1C1) & OVLxC1_OEN; 624 uint32_t fdadr1 = ofb->fbi->fdadr[DMA_OV1] | (enabled ? 0x1 : 0); 625 626 lcd_writel(ofb->fbi, enabled ? FBR1 : FDADR1, fdadr1); 627 lcd_writel(ofb->fbi, OVL1C2, ofb->control[1]); 628 lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] | OVLxC1_OEN); 629} 630 631static void overlay1fb_disable(struct pxafb_layer *ofb) 632{ 633 uint32_t lccr5; 634 635 if (!(lcd_readl(ofb->fbi, OVL1C1) & OVLxC1_OEN)) 636 return; 637 638 lccr5 = lcd_readl(ofb->fbi, LCCR5); 639 640 lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] & ~OVLxC1_OEN); 641 642 lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(1)); 643 lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(1)); 644 lcd_writel(ofb->fbi, FBR1, ofb->fbi->fdadr[DMA_OV1] | 0x3); 645 646 if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0) 647 pr_warn("%s: timeout disabling overlay1\n", __func__); 648 649 lcd_writel(ofb->fbi, LCCR5, lccr5); 650} 651 652static void overlay2fb_setup(struct pxafb_layer *ofb) 653{ 654 int size, div = 1, pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd); 655 unsigned long start[3] = { ofb->video_mem_phys, 0, 0 }; 656 657 if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED) { 658 size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual; 659 setup_frame_dma(ofb->fbi, DMA_OV2_Y, -1, start[0], size); 660 } else { 661 size = ofb->fb.var.xres_virtual * ofb->fb.var.yres_virtual; 662 switch (pfor) { 663 case OVERLAY_FORMAT_YUV444_PLANAR: div = 1; break; 664 case OVERLAY_FORMAT_YUV422_PLANAR: div = 2; break; 665 case OVERLAY_FORMAT_YUV420_PLANAR: div = 4; break; 666 } 667 start[1] = start[0] + size; 668 start[2] = start[1] + size / div; 669 setup_frame_dma(ofb->fbi, DMA_OV2_Y, -1, start[0], size); 670 setup_frame_dma(ofb->fbi, DMA_OV2_Cb, -1, start[1], size / div); 671 setup_frame_dma(ofb->fbi, DMA_OV2_Cr, -1, start[2], size / div); 672 } 673} 674 675static void overlay2fb_enable(struct pxafb_layer *ofb) 676{ 677 int pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd); 678 int enabled = lcd_readl(ofb->fbi, OVL2C1) & OVLxC1_OEN; 679 uint32_t fdadr2 = ofb->fbi->fdadr[DMA_OV2_Y] | (enabled ? 0x1 : 0); 680 uint32_t fdadr3 = ofb->fbi->fdadr[DMA_OV2_Cb] | (enabled ? 0x1 : 0); 681 uint32_t fdadr4 = ofb->fbi->fdadr[DMA_OV2_Cr] | (enabled ? 0x1 : 0); 682 683 if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED) 684 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2); 685 else { 686 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2); 687 lcd_writel(ofb->fbi, enabled ? FBR3 : FDADR3, fdadr3); 688 lcd_writel(ofb->fbi, enabled ? FBR4 : FDADR4, fdadr4); 689 } 690 lcd_writel(ofb->fbi, OVL2C2, ofb->control[1]); 691 lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] | OVLxC1_OEN); 692} 693 694static void overlay2fb_disable(struct pxafb_layer *ofb) 695{ 696 uint32_t lccr5; 697 698 if (!(lcd_readl(ofb->fbi, OVL2C1) & OVLxC1_OEN)) 699 return; 700 701 lccr5 = lcd_readl(ofb->fbi, LCCR5); 702 703 lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] & ~OVLxC1_OEN); 704 705 lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(2)); 706 lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(2)); 707 lcd_writel(ofb->fbi, FBR2, ofb->fbi->fdadr[DMA_OV2_Y] | 0x3); 708 lcd_writel(ofb->fbi, FBR3, ofb->fbi->fdadr[DMA_OV2_Cb] | 0x3); 709 lcd_writel(ofb->fbi, FBR4, ofb->fbi->fdadr[DMA_OV2_Cr] | 0x3); 710 711 if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0) 712 pr_warn("%s: timeout disabling overlay2\n", __func__); 713} 714 715static struct pxafb_layer_ops ofb_ops[] = { 716 [0] = { 717 .enable = overlay1fb_enable, 718 .disable = overlay1fb_disable, 719 .setup = overlay1fb_setup, 720 }, 721 [1] = { 722 .enable = overlay2fb_enable, 723 .disable = overlay2fb_disable, 724 .setup = overlay2fb_setup, 725 }, 726}; 727 728static int overlayfb_open(struct fb_info *info, int user) 729{ 730 struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb); 731 732 /* no support for framebuffer console on overlay */ 733 if (user == 0) 734 return -ENODEV; 735 736 if (ofb->usage++ == 0) { 737 /* unblank the base framebuffer */ 738 console_lock(); 739 fb_blank(&ofb->fbi->fb, FB_BLANK_UNBLANK); 740 console_unlock(); 741 } 742 743 return 0; 744} 745 746static int overlayfb_release(struct fb_info *info, int user) 747{ 748 struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb); 749 750 if (ofb->usage == 1) { 751 ofb->ops->disable(ofb); 752 ofb->fb.var.height = -1; 753 ofb->fb.var.width = -1; 754 ofb->fb.var.xres = ofb->fb.var.xres_virtual = 0; 755 ofb->fb.var.yres = ofb->fb.var.yres_virtual = 0; 756 757 ofb->usage--; 758 } 759 return 0; 760} 761 762static int overlayfb_check_var(struct fb_var_screeninfo *var, 763 struct fb_info *info) 764{ 765 struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb); 766 struct fb_var_screeninfo *base_var = &ofb->fbi->fb.var; 767 int xpos, ypos, pfor, bpp; 768 769 xpos = NONSTD_TO_XPOS(var->nonstd); 770 ypos = NONSTD_TO_YPOS(var->nonstd); 771 pfor = NONSTD_TO_PFOR(var->nonstd); 772 773 bpp = pxafb_var_to_bpp(var); 774 if (bpp < 0) 775 return -EINVAL; 776 777 /* no support for YUV format on overlay1 */ 778 if (ofb->id == OVERLAY1 && pfor != 0) 779 return -EINVAL; 780 781 /* for YUV packed formats, bpp = 'minimum bpp of YUV components' */ 782 switch (pfor) { 783 case OVERLAY_FORMAT_RGB: 784 bpp = pxafb_var_to_bpp(var); 785 if (bpp < 0) 786 return -EINVAL; 787 788 pxafb_set_pixfmt(var, var_to_depth(var)); 789 break; 790 case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break; 791 case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 8; break; 792 case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 4; break; 793 case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 2; break; 794 default: 795 return -EINVAL; 796 } 797 798 /* each line must start at a 32-bit word boundary */ 799 if ((xpos * bpp) % 32) 800 return -EINVAL; 801 802 /* xres must align on 32-bit word boundary */ 803 var->xres = roundup(var->xres * bpp, 32) / bpp; 804 805 if ((xpos + var->xres > base_var->xres) || 806 (ypos + var->yres > base_var->yres)) 807 return -EINVAL; 808 809 var->xres_virtual = var->xres; 810 var->yres_virtual = max(var->yres, var->yres_virtual); 811 return 0; 812} 813 814static int overlayfb_check_video_memory(struct pxafb_layer *ofb) 815{ 816 struct fb_var_screeninfo *var = &ofb->fb.var; 817 int pfor = NONSTD_TO_PFOR(var->nonstd); 818 int size, bpp = 0; 819 820 switch (pfor) { 821 case OVERLAY_FORMAT_RGB: bpp = var->bits_per_pixel; break; 822 case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break; 823 case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 24; break; 824 case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 16; break; 825 case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 12; break; 826 } 827 828 ofb->fb.fix.line_length = var->xres_virtual * bpp / 8; 829 830 size = PAGE_ALIGN(ofb->fb.fix.line_length * var->yres_virtual); 831 832 if (ofb->video_mem) { 833 if (ofb->video_mem_size >= size) 834 return 0; 835 } 836 return -EINVAL; 837} 838 839static int overlayfb_set_par(struct fb_info *info) 840{ 841 struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb); 842 struct fb_var_screeninfo *var = &info->var; 843 int xpos, ypos, pfor, bpp, ret; 844 845 ret = overlayfb_check_video_memory(ofb); 846 if (ret) 847 return ret; 848 849 bpp = pxafb_var_to_bpp(var); 850 xpos = NONSTD_TO_XPOS(var->nonstd); 851 ypos = NONSTD_TO_YPOS(var->nonstd); 852 pfor = NONSTD_TO_PFOR(var->nonstd); 853 854 ofb->control[0] = OVLxC1_PPL(var->xres) | OVLxC1_LPO(var->yres) | 855 OVLxC1_BPP(bpp); 856 ofb->control[1] = OVLxC2_XPOS(xpos) | OVLxC2_YPOS(ypos); 857 858 if (ofb->id == OVERLAY2) 859 ofb->control[1] |= OVL2C2_PFOR(pfor); 860 861 ofb->ops->setup(ofb); 862 ofb->ops->enable(ofb); 863 return 0; 864} 865 866static const struct fb_ops overlay_fb_ops = { 867 .owner = THIS_MODULE, 868 .fb_open = overlayfb_open, 869 .fb_release = overlayfb_release, 870 .fb_check_var = overlayfb_check_var, 871 .fb_set_par = overlayfb_set_par, 872}; 873 874static void init_pxafb_overlay(struct pxafb_info *fbi, struct pxafb_layer *ofb, 875 int id) 876{ 877 sprintf(ofb->fb.fix.id, "overlay%d", id + 1); 878 879 ofb->fb.fix.type = FB_TYPE_PACKED_PIXELS; 880 ofb->fb.fix.xpanstep = 0; 881 ofb->fb.fix.ypanstep = 1; 882 883 ofb->fb.var.activate = FB_ACTIVATE_NOW; 884 ofb->fb.var.height = -1; 885 ofb->fb.var.width = -1; 886 ofb->fb.var.vmode = FB_VMODE_NONINTERLACED; 887 888 ofb->fb.fbops = &overlay_fb_ops; 889 ofb->fb.node = -1; 890 ofb->fb.pseudo_palette = NULL; 891 892 ofb->id = id; 893 ofb->ops = &ofb_ops[id]; 894 ofb->usage = 0; 895 ofb->fbi = fbi; 896 init_completion(&ofb->branch_done); 897} 898 899static inline int pxafb_overlay_supported(void) 900{ 901 if (cpu_is_pxa27x() || cpu_is_pxa3xx()) 902 return 1; 903 904 return 0; 905} 906 907static int pxafb_overlay_map_video_memory(struct pxafb_info *pxafb, 908 struct pxafb_layer *ofb) 909{ 910 /* We assume that user will use at most video_mem_size for overlay fb, 911 * anyway, it's useless to use 16bpp main plane and 24bpp overlay 912 */ 913 ofb->video_mem = alloc_pages_exact(PAGE_ALIGN(pxafb->video_mem_size), 914 GFP_KERNEL | __GFP_ZERO); 915 if (ofb->video_mem == NULL) 916 return -ENOMEM; 917 918 ofb->video_mem_phys = virt_to_phys(ofb->video_mem); 919 ofb->video_mem_size = PAGE_ALIGN(pxafb->video_mem_size); 920 921 mutex_lock(&ofb->fb.mm_lock); 922 ofb->fb.fix.smem_start = ofb->video_mem_phys; 923 ofb->fb.fix.smem_len = pxafb->video_mem_size; 924 mutex_unlock(&ofb->fb.mm_lock); 925 926 ofb->fb.screen_base = ofb->video_mem; 927 928 return 0; 929} 930 931static void pxafb_overlay_init(struct pxafb_info *fbi) 932{ 933 int i, ret; 934 935 if (!pxafb_overlay_supported()) 936 return; 937 938 for (i = 0; i < 2; i++) { 939 struct pxafb_layer *ofb = &fbi->overlay[i]; 940 init_pxafb_overlay(fbi, ofb, i); 941 ret = register_framebuffer(&ofb->fb); 942 if (ret) { 943 dev_err(fbi->dev, "failed to register overlay %d\n", i); 944 continue; 945 } 946 ret = pxafb_overlay_map_video_memory(fbi, ofb); 947 if (ret) { 948 dev_err(fbi->dev, 949 "failed to map video memory for overlay %d\n", 950 i); 951 unregister_framebuffer(&ofb->fb); 952 continue; 953 } 954 ofb->registered = 1; 955 } 956 957 /* mask all IU/BS/EOF/SOF interrupts */ 958 lcd_writel(fbi, LCCR5, ~0); 959 960 pr_info("PXA Overlay driver loaded successfully!\n"); 961} 962 963static void pxafb_overlay_exit(struct pxafb_info *fbi) 964{ 965 int i; 966 967 if (!pxafb_overlay_supported()) 968 return; 969 970 for (i = 0; i < 2; i++) { 971 struct pxafb_layer *ofb = &fbi->overlay[i]; 972 if (ofb->registered) { 973 if (ofb->video_mem) 974 free_pages_exact(ofb->video_mem, 975 ofb->video_mem_size); 976 unregister_framebuffer(&ofb->fb); 977 } 978 } 979} 980#else 981static inline void pxafb_overlay_init(struct pxafb_info *fbi) {} 982static inline void pxafb_overlay_exit(struct pxafb_info *fbi) {} 983#endif /* CONFIG_FB_PXA_OVERLAY */ 984 985/* 986 * Calculate the PCD value from the clock rate (in picoseconds). 987 * We take account of the PPCR clock setting. 988 * From PXA Developer's Manual: 989 * 990 * PixelClock = LCLK 991 * ------------- 992 * 2 ( PCD + 1 ) 993 * 994 * PCD = LCLK 995 * ------------- - 1 996 * 2(PixelClock) 997 * 998 * Where: 999 * LCLK = LCD/Memory Clock 1000 * PCD = LCCR3[7:0] 1001 * 1002 * PixelClock here is in Hz while the pixclock argument given is the 1003 * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 ) 1004 * 1005 * The function get_lclk_frequency_10khz returns LCLK in units of 1006 * 10khz. Calling the result of this function lclk gives us the 1007 * following 1008 * 1009 * PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 ) 1010 * -------------------------------------- - 1 1011 * 2 1012 * 1013 * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below. 1014 */ 1015static inline unsigned int get_pcd(struct pxafb_info *fbi, 1016 unsigned int pixclock) 1017{ 1018 unsigned long long pcd; 1019 1020 /* FIXME: Need to take into account Double Pixel Clock mode 1021 * (DPC) bit? or perhaps set it based on the various clock 1022 * speeds */ 1023 pcd = (unsigned long long)(clk_get_rate(fbi->clk) / 10000); 1024 pcd *= pixclock; 1025 do_div(pcd, 100000000 * 2); 1026 /* no need for this, since we should subtract 1 anyway. they cancel */ 1027 /* pcd += 1; */ /* make up for integer math truncations */ 1028 return (unsigned int)pcd; 1029} 1030 1031/* 1032 * Some touchscreens need hsync information from the video driver to 1033 * function correctly. We export it here. Note that 'hsync_time' and 1034 * the value returned from pxafb_get_hsync_time() is the *reciprocal* 1035 * of the hsync period in seconds. 1036 */ 1037static inline void set_hsync_time(struct pxafb_info *fbi, unsigned int pcd) 1038{ 1039 unsigned long htime; 1040 1041 if ((pcd == 0) || (fbi->fb.var.hsync_len == 0)) { 1042 fbi->hsync_time = 0; 1043 return; 1044 } 1045 1046 htime = clk_get_rate(fbi->clk) / (pcd * fbi->fb.var.hsync_len); 1047 1048 fbi->hsync_time = htime; 1049} 1050 1051unsigned long pxafb_get_hsync_time(struct device *dev) 1052{ 1053 struct pxafb_info *fbi = dev_get_drvdata(dev); 1054 1055 /* If display is blanked/suspended, hsync isn't active */ 1056 if (!fbi || (fbi->state != C_ENABLE)) 1057 return 0; 1058 1059 return fbi->hsync_time; 1060} 1061EXPORT_SYMBOL(pxafb_get_hsync_time); 1062 1063static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal, 1064 unsigned long start, size_t size) 1065{ 1066 struct pxafb_dma_descriptor *dma_desc, *pal_desc; 1067 unsigned int dma_desc_off, pal_desc_off; 1068 1069 if (dma < 0 || dma >= DMA_MAX * 2) 1070 return -EINVAL; 1071 1072 dma_desc = &fbi->dma_buff->dma_desc[dma]; 1073 dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[dma]); 1074 1075 dma_desc->fsadr = start; 1076 dma_desc->fidr = 0; 1077 dma_desc->ldcmd = size; 1078 1079 if (pal < 0 || pal >= PAL_MAX * 2) { 1080 dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off; 1081 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off; 1082 } else { 1083 pal_desc = &fbi->dma_buff->pal_desc[pal]; 1084 pal_desc_off = offsetof(struct pxafb_dma_buff, pal_desc[pal]); 1085 1086 pal_desc->fsadr = fbi->dma_buff_phys + pal * PALETTE_SIZE; 1087 pal_desc->fidr = 0; 1088 1089 if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0) 1090 pal_desc->ldcmd = fbi->palette_size * sizeof(u16); 1091 else 1092 pal_desc->ldcmd = fbi->palette_size * sizeof(u32); 1093 1094 pal_desc->ldcmd |= LDCMD_PAL; 1095 1096 /* flip back and forth between palette and frame buffer */ 1097 pal_desc->fdadr = fbi->dma_buff_phys + dma_desc_off; 1098 dma_desc->fdadr = fbi->dma_buff_phys + pal_desc_off; 1099 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off; 1100 } 1101 1102 return 0; 1103} 1104 1105static void setup_base_frame(struct pxafb_info *fbi, 1106 struct fb_var_screeninfo *var, 1107 int branch) 1108{ 1109 struct fb_fix_screeninfo *fix = &fbi->fb.fix; 1110 int nbytes, dma, pal, bpp = var->bits_per_pixel; 1111 unsigned long offset; 1112 1113 dma = DMA_BASE + (branch ? DMA_MAX : 0); 1114 pal = (bpp >= 16) ? PAL_NONE : PAL_BASE + (branch ? PAL_MAX : 0); 1115 1116 nbytes = fix->line_length * var->yres; 1117 offset = fix->line_length * var->yoffset + fbi->video_mem_phys; 1118 1119 if (fbi->lccr0 & LCCR0_SDS) { 1120 nbytes = nbytes / 2; 1121 setup_frame_dma(fbi, dma + 1, PAL_NONE, offset + nbytes, nbytes); 1122 } 1123 1124 setup_frame_dma(fbi, dma, pal, offset, nbytes); 1125} 1126 1127#ifdef CONFIG_FB_PXA_SMARTPANEL 1128static int setup_smart_dma(struct pxafb_info *fbi) 1129{ 1130 struct pxafb_dma_descriptor *dma_desc; 1131 unsigned long dma_desc_off, cmd_buff_off; 1132 1133 dma_desc = &fbi->dma_buff->dma_desc[DMA_CMD]; 1134 dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[DMA_CMD]); 1135 cmd_buff_off = offsetof(struct pxafb_dma_buff, cmd_buff); 1136 1137 dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off; 1138 dma_desc->fsadr = fbi->dma_buff_phys + cmd_buff_off; 1139 dma_desc->fidr = 0; 1140 dma_desc->ldcmd = fbi->n_smart_cmds * sizeof(uint16_t); 1141 1142 fbi->fdadr[DMA_CMD] = dma_desc->fdadr; 1143 return 0; 1144} 1145 1146int pxafb_smart_flush(struct fb_info *info) 1147{ 1148 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 1149 uint32_t prsr; 1150 int ret = 0; 1151 1152 /* disable controller until all registers are set up */ 1153 lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB); 1154 1155 /* 1. make it an even number of commands to align on 32-bit boundary 1156 * 2. add the interrupt command to the end of the chain so we can 1157 * keep track of the end of the transfer 1158 */ 1159 1160 while (fbi->n_smart_cmds & 1) 1161 fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_NOOP; 1162 1163 fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_INTERRUPT; 1164 fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_WAIT_FOR_VSYNC; 1165 setup_smart_dma(fbi); 1166 1167 /* continue to execute next command */ 1168 prsr = lcd_readl(fbi, PRSR) | PRSR_ST_OK | PRSR_CON_NT; 1169 lcd_writel(fbi, PRSR, prsr); 1170 1171 /* stop the processor in case it executed "wait for sync" cmd */ 1172 lcd_writel(fbi, CMDCR, 0x0001); 1173 1174 /* don't send interrupts for fifo underruns on channel 6 */ 1175 lcd_writel(fbi, LCCR5, LCCR5_IUM(6)); 1176 1177 lcd_writel(fbi, LCCR1, fbi->reg_lccr1); 1178 lcd_writel(fbi, LCCR2, fbi->reg_lccr2); 1179 lcd_writel(fbi, LCCR3, fbi->reg_lccr3); 1180 lcd_writel(fbi, LCCR4, fbi->reg_lccr4); 1181 lcd_writel(fbi, FDADR0, fbi->fdadr[0]); 1182 lcd_writel(fbi, FDADR6, fbi->fdadr[6]); 1183 1184 /* begin sending */ 1185 lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB); 1186 1187 if (wait_for_completion_timeout(&fbi->command_done, HZ/2) == 0) { 1188 pr_warn("%s: timeout waiting for command done\n", __func__); 1189 ret = -ETIMEDOUT; 1190 } 1191 1192 /* quick disable */ 1193 prsr = lcd_readl(fbi, PRSR) & ~(PRSR_ST_OK | PRSR_CON_NT); 1194 lcd_writel(fbi, PRSR, prsr); 1195 lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB); 1196 lcd_writel(fbi, FDADR6, 0); 1197 fbi->n_smart_cmds = 0; 1198 return ret; 1199} 1200 1201int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds) 1202{ 1203 int i; 1204 struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); 1205 1206 for (i = 0; i < n_cmds; i++, cmds++) { 1207 /* if it is a software delay, flush and delay */ 1208 if ((*cmds & 0xff00) == SMART_CMD_DELAY) { 1209 pxafb_smart_flush(info); 1210 mdelay(*cmds & 0xff); 1211 continue; 1212 } 1213 1214 /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */ 1215 if (fbi->n_smart_cmds == CMD_BUFF_SIZE - 8) 1216 pxafb_smart_flush(info); 1217 1218 fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds; 1219 } 1220 1221 return 0; 1222} 1223 1224static unsigned int __smart_timing(unsigned time_ns, unsigned long lcd_clk) 1225{ 1226 unsigned int t = (time_ns * (lcd_clk / 1000000) / 1000); 1227 return (t == 0) ? 1 : t; 1228} 1229 1230static void setup_smart_timing(struct pxafb_info *fbi, 1231 struct fb_var_screeninfo *var) 1232{ 1233 struct pxafb_mach_info *inf = fbi->inf; 1234 struct pxafb_mode_info *mode = &inf->modes[0]; 1235 unsigned long lclk = clk_get_rate(fbi->clk); 1236 unsigned t1, t2, t3, t4; 1237 1238 t1 = max(mode->a0csrd_set_hld, mode->a0cswr_set_hld); 1239 t2 = max(mode->rd_pulse_width, mode->wr_pulse_width); 1240 t3 = mode->op_hold_time; 1241 t4 = mode->cmd_inh_time; 1242 1243 fbi->reg_lccr1 = 1244 LCCR1_DisWdth(var->xres) | 1245 LCCR1_BegLnDel(__smart_timing(t1, lclk)) | 1246 LCCR1_EndLnDel(__smart_timing(t2, lclk)) | 1247 LCCR1_HorSnchWdth(__smart_timing(t3, lclk)); 1248 1249 fbi->reg_lccr2 = LCCR2_DisHght(var->yres); 1250 fbi->reg_lccr3 = fbi->lccr3 | LCCR3_PixClkDiv(__smart_timing(t4, lclk)); 1251 fbi->reg_lccr3 |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? LCCR3_HSP : 0; 1252 fbi->reg_lccr3 |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? LCCR3_VSP : 0; 1253 1254 /* FIXME: make this configurable */ 1255 fbi->reg_cmdcr = 1; 1256} 1257 1258static int pxafb_smart_thread(void *arg) 1259{ 1260 struct pxafb_info *fbi = arg; 1261 struct pxafb_mach_info *inf = fbi->inf; 1262 1263 if (!inf->smart_update) { 1264 pr_err("%s: not properly initialized, thread terminated\n", 1265 __func__); 1266 return -EINVAL; 1267 } 1268 1269 pr_debug("%s(): task starting\n", __func__); 1270 1271 set_freezable(); 1272 while (!kthread_should_stop()) { 1273 1274 if (try_to_freeze()) 1275 continue; 1276 1277 mutex_lock(&fbi->ctrlr_lock); 1278 1279 if (fbi->state == C_ENABLE) { 1280 inf->smart_update(&fbi->fb); 1281 complete(&fbi->refresh_done); 1282 } 1283 1284 mutex_unlock(&fbi->ctrlr_lock); 1285 1286 set_current_state(TASK_INTERRUPTIBLE); 1287 schedule_timeout(msecs_to_jiffies(30)); 1288 } 1289 1290 pr_debug("%s(): task ending\n", __func__); 1291 return 0; 1292} 1293 1294static int pxafb_smart_init(struct pxafb_info *fbi) 1295{ 1296 if (!(fbi->lccr0 & LCCR0_LCDT)) 1297 return 0; 1298 1299 fbi->smart_cmds = (uint16_t *) fbi->dma_buff->cmd_buff; 1300 fbi->n_smart_cmds = 0; 1301 1302 init_completion(&fbi->command_done); 1303 init_completion(&fbi->refresh_done); 1304 1305 fbi->smart_thread = kthread_run(pxafb_smart_thread, fbi, 1306 "lcd_refresh"); 1307 if (IS_ERR(fbi->smart_thread)) { 1308 pr_err("%s: unable to create kernel thread\n", __func__); 1309 return PTR_ERR(fbi->smart_thread); 1310 } 1311 1312 return 0; 1313} 1314#else 1315static inline int pxafb_smart_init(struct pxafb_info *fbi) { return 0; } 1316#endif /* CONFIG_FB_PXA_SMARTPANEL */ 1317 1318static void setup_parallel_timing(struct pxafb_info *fbi, 1319 struct fb_var_screeninfo *var) 1320{ 1321 unsigned int lines_per_panel, pcd = get_pcd(fbi, var->pixclock); 1322 1323 fbi->reg_lccr1 = 1324 LCCR1_DisWdth(var->xres) + 1325 LCCR1_HorSnchWdth(var->hsync_len) + 1326 LCCR1_BegLnDel(var->left_margin) + 1327 LCCR1_EndLnDel(var->right_margin); 1328 1329 /* 1330 * If we have a dual scan LCD, we need to halve 1331 * the YRES parameter. 1332 */ 1333 lines_per_panel = var->yres; 1334 if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) 1335 lines_per_panel /= 2; 1336 1337 fbi->reg_lccr2 = 1338 LCCR2_DisHght(lines_per_panel) + 1339 LCCR2_VrtSnchWdth(var->vsync_len) + 1340 LCCR2_BegFrmDel(var->upper_margin) + 1341 LCCR2_EndFrmDel(var->lower_margin); 1342 1343 fbi->reg_lccr3 = fbi->lccr3 | 1344 (var->sync & FB_SYNC_HOR_HIGH_ACT ? 1345 LCCR3_HorSnchH : LCCR3_HorSnchL) | 1346 (var->sync & FB_SYNC_VERT_HIGH_ACT ? 1347 LCCR3_VrtSnchH : LCCR3_VrtSnchL); 1348 1349 if (pcd) { 1350 fbi->reg_lccr3 |= LCCR3_PixClkDiv(pcd); 1351 set_hsync_time(fbi, pcd); 1352 } 1353} 1354 1355/* 1356 * pxafb_activate_var(): 1357 * Configures LCD Controller based on entries in var parameter. 1358 * Settings are only written to the controller if changes were made. 1359 */ 1360static int pxafb_activate_var(struct fb_var_screeninfo *var, 1361 struct pxafb_info *fbi) 1362{ 1363 u_long flags; 1364 1365 /* Update shadow copy atomically */ 1366 local_irq_save(flags); 1367 1368#ifdef CONFIG_FB_PXA_SMARTPANEL 1369 if (fbi->lccr0 & LCCR0_LCDT) 1370 setup_smart_timing(fbi, var); 1371 else 1372#endif 1373 setup_parallel_timing(fbi, var); 1374 1375 setup_base_frame(fbi, var, 0); 1376 1377 fbi->reg_lccr0 = fbi->lccr0 | 1378 (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | 1379 LCCR0_QDM | LCCR0_BM | LCCR0_OUM); 1380 1381 fbi->reg_lccr3 |= pxafb_var_to_lccr3(var); 1382 1383 fbi->reg_lccr4 = lcd_readl(fbi, LCCR4) & ~LCCR4_PAL_FOR_MASK; 1384 fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK); 1385 local_irq_restore(flags); 1386 1387 /* 1388 * Only update the registers if the controller is enabled 1389 * and something has changed. 1390 */ 1391 if ((lcd_readl(fbi, LCCR0) != fbi->reg_lccr0) || 1392 (lcd_readl(fbi, LCCR1) != fbi->reg_lccr1) || 1393 (lcd_readl(fbi, LCCR2) != fbi->reg_lccr2) || 1394 (lcd_readl(fbi, LCCR3) != fbi->reg_lccr3) || 1395 (lcd_readl(fbi, LCCR4) != fbi->reg_lccr4) || 1396 (lcd_readl(fbi, FDADR0) != fbi->fdadr[0]) || 1397 ((fbi->lccr0 & LCCR0_SDS) && 1398 (lcd_readl(fbi, FDADR1) != fbi->fdadr[1]))) 1399 pxafb_schedule_work(fbi, C_REENABLE); 1400 1401 return 0; 1402} 1403 1404/* 1405 * NOTE! The following functions are purely helpers for set_ctrlr_state. 1406 * Do not call them directly; set_ctrlr_state does the correct serialisation 1407 * to ensure that things happen in the right way 100% of time time. 1408 * -- rmk 1409 */ 1410static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on) 1411{ 1412 pr_debug("pxafb: backlight o%s\n", on ? "n" : "ff"); 1413 1414 if (fbi->backlight_power) 1415 fbi->backlight_power(on); 1416} 1417 1418static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on) 1419{ 1420 pr_debug("pxafb: LCD power o%s\n", on ? "n" : "ff"); 1421 1422 if (fbi->lcd_power) 1423 fbi->lcd_power(on, &fbi->fb.var); 1424 1425 if (fbi->lcd_supply && fbi->lcd_supply_enabled != on) { 1426 int ret; 1427 1428 if (on) 1429 ret = regulator_enable(fbi->lcd_supply); 1430 else 1431 ret = regulator_disable(fbi->lcd_supply); 1432 1433 if (ret < 0) 1434 pr_warn("Unable to %s LCD supply regulator: %d\n", 1435 on ? "enable" : "disable", ret); 1436 else 1437 fbi->lcd_supply_enabled = on; 1438 } 1439} 1440 1441static void pxafb_enable_controller(struct pxafb_info *fbi) 1442{ 1443 pr_debug("pxafb: Enabling LCD controller\n"); 1444 pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr[0]); 1445 pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr[1]); 1446 pr_debug("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0); 1447 pr_debug("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1); 1448 pr_debug("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2); 1449 pr_debug("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3); 1450 1451 /* enable LCD controller clock */ 1452 if (clk_prepare_enable(fbi->clk)) { 1453 pr_err("%s: Failed to prepare clock\n", __func__); 1454 return; 1455 } 1456 1457 if (fbi->lccr0 & LCCR0_LCDT) 1458 return; 1459 1460 /* Sequence from 11.7.10 */ 1461 lcd_writel(fbi, LCCR4, fbi->reg_lccr4); 1462 lcd_writel(fbi, LCCR3, fbi->reg_lccr3); 1463 lcd_writel(fbi, LCCR2, fbi->reg_lccr2); 1464 lcd_writel(fbi, LCCR1, fbi->reg_lccr1); 1465 lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB); 1466 1467 lcd_writel(fbi, FDADR0, fbi->fdadr[0]); 1468 if (fbi->lccr0 & LCCR0_SDS) 1469 lcd_writel(fbi, FDADR1, fbi->fdadr[1]); 1470 lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB); 1471} 1472 1473static void pxafb_disable_controller(struct pxafb_info *fbi) 1474{ 1475 uint32_t lccr0; 1476 1477#ifdef CONFIG_FB_PXA_SMARTPANEL 1478 if (fbi->lccr0 & LCCR0_LCDT) { 1479 wait_for_completion_timeout(&fbi->refresh_done, 1480 msecs_to_jiffies(200)); 1481 return; 1482 } 1483#endif 1484 1485 /* Clear LCD Status Register */ 1486 lcd_writel(fbi, LCSR, 0xffffffff); 1487 1488 lccr0 = lcd_readl(fbi, LCCR0) & ~LCCR0_LDM; 1489 lcd_writel(fbi, LCCR0, lccr0); 1490 lcd_writel(fbi, LCCR0, lccr0 | LCCR0_DIS); 1491 1492 wait_for_completion_timeout(&fbi->disable_done, msecs_to_jiffies(200)); 1493 1494 /* disable LCD controller clock */ 1495 clk_disable_unprepare(fbi->clk); 1496} 1497 1498/* 1499 * pxafb_handle_irq: Handle 'LCD DONE' interrupts. 1500 */ 1501static irqreturn_t pxafb_handle_irq(int irq, void *dev_id) 1502{ 1503 struct pxafb_info *fbi = dev_id; 1504 unsigned int lccr0, lcsr; 1505 1506 lcsr = lcd_readl(fbi, LCSR); 1507 if (lcsr & LCSR_LDD) { 1508 lccr0 = lcd_readl(fbi, LCCR0); 1509 lcd_writel(fbi, LCCR0, lccr0 | LCCR0_LDM); 1510 complete(&fbi->disable_done); 1511 } 1512 1513#ifdef CONFIG_FB_PXA_SMARTPANEL 1514 if (lcsr & LCSR_CMD_INT) 1515 complete(&fbi->command_done); 1516#endif 1517 lcd_writel(fbi, LCSR, lcsr); 1518 1519#ifdef CONFIG_FB_PXA_OVERLAY 1520 { 1521 unsigned int lcsr1 = lcd_readl(fbi, LCSR1); 1522 if (lcsr1 & LCSR1_BS(1)) 1523 complete(&fbi->overlay[0].branch_done); 1524 1525 if (lcsr1 & LCSR1_BS(2)) 1526 complete(&fbi->overlay[1].branch_done); 1527 1528 lcd_writel(fbi, LCSR1, lcsr1); 1529 } 1530#endif 1531 return IRQ_HANDLED; 1532} 1533 1534/* 1535 * This function must be called from task context only, since it will 1536 * sleep when disabling the LCD controller, or if we get two contending 1537 * processes trying to alter state. 1538 */ 1539static void set_ctrlr_state(struct pxafb_info *fbi, u_int state) 1540{ 1541 u_int old_state; 1542 1543 mutex_lock(&fbi->ctrlr_lock); 1544 1545 old_state = fbi->state; 1546 1547 /* 1548 * Hack around fbcon initialisation. 1549 */ 1550 if (old_state == C_STARTUP && state == C_REENABLE) 1551 state = C_ENABLE; 1552 1553 switch (state) { 1554 case C_DISABLE_CLKCHANGE: 1555 /* 1556 * Disable controller for clock change. If the 1557 * controller is already disabled, then do nothing. 1558 */ 1559 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) { 1560 fbi->state = state; 1561 /* TODO __pxafb_lcd_power(fbi, 0); */ 1562 pxafb_disable_controller(fbi); 1563 } 1564 break; 1565 1566 case C_DISABLE_PM: 1567 case C_DISABLE: 1568 /* 1569 * Disable controller 1570 */ 1571 if (old_state != C_DISABLE) { 1572 fbi->state = state; 1573 __pxafb_backlight_power(fbi, 0); 1574 __pxafb_lcd_power(fbi, 0); 1575 if (old_state != C_DISABLE_CLKCHANGE) 1576 pxafb_disable_controller(fbi); 1577 } 1578 break; 1579 1580 case C_ENABLE_CLKCHANGE: 1581 /* 1582 * Enable the controller after clock change. Only 1583 * do this if we were disabled for the clock change. 1584 */ 1585 if (old_state == C_DISABLE_CLKCHANGE) { 1586 fbi->state = C_ENABLE; 1587 pxafb_enable_controller(fbi); 1588 /* TODO __pxafb_lcd_power(fbi, 1); */ 1589 } 1590 break; 1591 1592 case C_REENABLE: 1593 /* 1594 * Re-enable the controller only if it was already 1595 * enabled. This is so we reprogram the control 1596 * registers. 1597 */ 1598 if (old_state == C_ENABLE) { 1599 __pxafb_lcd_power(fbi, 0); 1600 pxafb_disable_controller(fbi); 1601 pxafb_enable_controller(fbi); 1602 __pxafb_lcd_power(fbi, 1); 1603 } 1604 break; 1605 1606 case C_ENABLE_PM: 1607 /* 1608 * Re-enable the controller after PM. This is not 1609 * perfect - think about the case where we were doing 1610 * a clock change, and we suspended half-way through. 1611 */ 1612 if (old_state != C_DISABLE_PM) 1613 break; 1614 fallthrough; 1615 1616 case C_ENABLE: 1617 /* 1618 * Power up the LCD screen, enable controller, and 1619 * turn on the backlight. 1620 */ 1621 if (old_state != C_ENABLE) { 1622 fbi->state = C_ENABLE; 1623 pxafb_enable_controller(fbi); 1624 __pxafb_lcd_power(fbi, 1); 1625 __pxafb_backlight_power(fbi, 1); 1626 } 1627 break; 1628 } 1629 mutex_unlock(&fbi->ctrlr_lock); 1630} 1631 1632/* 1633 * Our LCD controller task (which is called when we blank or unblank) 1634 * via keventd. 1635 */ 1636static void pxafb_task(struct work_struct *work) 1637{ 1638 struct pxafb_info *fbi = 1639 container_of(work, struct pxafb_info, task); 1640 u_int state = xchg(&fbi->task_state, -1); 1641 1642 set_ctrlr_state(fbi, state); 1643} 1644 1645#ifdef CONFIG_CPU_FREQ 1646/* 1647 * CPU clock speed change handler. We need to adjust the LCD timing 1648 * parameters when the CPU clock is adjusted by the power management 1649 * subsystem. 1650 * 1651 * TODO: Determine why f->new != 10*get_lclk_frequency_10khz() 1652 */ 1653static int 1654pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data) 1655{ 1656 struct pxafb_info *fbi = TO_INF(nb, freq_transition); 1657 /* TODO struct cpufreq_freqs *f = data; */ 1658 u_int pcd; 1659 1660 switch (val) { 1661 case CPUFREQ_PRECHANGE: 1662#ifdef CONFIG_FB_PXA_OVERLAY 1663 if (!(fbi->overlay[0].usage || fbi->overlay[1].usage)) 1664#endif 1665 set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE); 1666 break; 1667 1668 case CPUFREQ_POSTCHANGE: 1669 pcd = get_pcd(fbi, fbi->fb.var.pixclock); 1670 set_hsync_time(fbi, pcd); 1671 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | 1672 LCCR3_PixClkDiv(pcd); 1673 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE); 1674 break; 1675 } 1676 return 0; 1677} 1678#endif 1679 1680#ifdef CONFIG_PM 1681/* 1682 * Power management hooks. Note that we won't be called from IRQ context, 1683 * unlike the blank functions above, so we may sleep. 1684 */ 1685static int pxafb_suspend(struct device *dev) 1686{ 1687 struct pxafb_info *fbi = dev_get_drvdata(dev); 1688 1689 set_ctrlr_state(fbi, C_DISABLE_PM); 1690 return 0; 1691} 1692 1693static int pxafb_resume(struct device *dev) 1694{ 1695 struct pxafb_info *fbi = dev_get_drvdata(dev); 1696 1697 set_ctrlr_state(fbi, C_ENABLE_PM); 1698 return 0; 1699} 1700 1701static const struct dev_pm_ops pxafb_pm_ops = { 1702 .suspend = pxafb_suspend, 1703 .resume = pxafb_resume, 1704}; 1705#endif 1706 1707static int pxafb_init_video_memory(struct pxafb_info *fbi) 1708{ 1709 int size = PAGE_ALIGN(fbi->video_mem_size); 1710 1711 fbi->video_mem = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO); 1712 if (fbi->video_mem == NULL) 1713 return -ENOMEM; 1714 1715 fbi->video_mem_phys = virt_to_phys(fbi->video_mem); 1716 fbi->video_mem_size = size; 1717 1718 fbi->fb.fix.smem_start = fbi->video_mem_phys; 1719 fbi->fb.fix.smem_len = fbi->video_mem_size; 1720 fbi->fb.screen_base = fbi->video_mem; 1721 1722 return fbi->video_mem ? 0 : -ENOMEM; 1723} 1724 1725static void pxafb_decode_mach_info(struct pxafb_info *fbi, 1726 struct pxafb_mach_info *inf) 1727{ 1728 unsigned int lcd_conn = inf->lcd_conn; 1729 struct pxafb_mode_info *m; 1730 int i; 1731 1732 fbi->cmap_inverse = inf->cmap_inverse; 1733 fbi->cmap_static = inf->cmap_static; 1734 fbi->lccr4 = inf->lccr4; 1735 1736 switch (lcd_conn & LCD_TYPE_MASK) { 1737 case LCD_TYPE_MONO_STN: 1738 fbi->lccr0 = LCCR0_CMS; 1739 break; 1740 case LCD_TYPE_MONO_DSTN: 1741 fbi->lccr0 = LCCR0_CMS | LCCR0_SDS; 1742 break; 1743 case LCD_TYPE_COLOR_STN: 1744 fbi->lccr0 = 0; 1745 break; 1746 case LCD_TYPE_COLOR_DSTN: 1747 fbi->lccr0 = LCCR0_SDS; 1748 break; 1749 case LCD_TYPE_COLOR_TFT: 1750 fbi->lccr0 = LCCR0_PAS; 1751 break; 1752 case LCD_TYPE_SMART_PANEL: 1753 fbi->lccr0 = LCCR0_LCDT | LCCR0_PAS; 1754 break; 1755 default: 1756 /* fall back to backward compatibility way */ 1757 fbi->lccr0 = inf->lccr0; 1758 fbi->lccr3 = inf->lccr3; 1759 goto decode_mode; 1760 } 1761 1762 if (lcd_conn == LCD_MONO_STN_8BPP) 1763 fbi->lccr0 |= LCCR0_DPD; 1764 1765 fbi->lccr0 |= (lcd_conn & LCD_ALTERNATE_MAPPING) ? LCCR0_LDDALT : 0; 1766 1767 fbi->lccr3 = LCCR3_Acb((inf->lcd_conn >> 10) & 0xff); 1768 fbi->lccr3 |= (lcd_conn & LCD_BIAS_ACTIVE_LOW) ? LCCR3_OEP : 0; 1769 fbi->lccr3 |= (lcd_conn & LCD_PCLK_EDGE_FALL) ? LCCR3_PCP : 0; 1770 1771decode_mode: 1772 pxafb_setmode(&fbi->fb.var, &inf->modes[0]); 1773 1774 /* decide video memory size as follows: 1775 * 1. default to mode of maximum resolution 1776 * 2. allow platform to override 1777 * 3. allow module parameter to override 1778 */ 1779 for (i = 0, m = &inf->modes[0]; i < inf->num_modes; i++, m++) 1780 fbi->video_mem_size = max_t(size_t, fbi->video_mem_size, 1781 m->xres * m->yres * m->bpp / 8); 1782 1783 if (inf->video_mem_size > fbi->video_mem_size) 1784 fbi->video_mem_size = inf->video_mem_size; 1785 1786 if (video_mem_size > fbi->video_mem_size) 1787 fbi->video_mem_size = video_mem_size; 1788} 1789 1790static struct pxafb_info *pxafb_init_fbinfo(struct device *dev, 1791 struct pxafb_mach_info *inf) 1792{ 1793 struct pxafb_info *fbi; 1794 void *addr; 1795 1796 /* Alloc the pxafb_info and pseudo_palette in one step */ 1797 fbi = devm_kzalloc(dev, sizeof(struct pxafb_info) + sizeof(u32) * 16, 1798 GFP_KERNEL); 1799 if (!fbi) 1800 return ERR_PTR(-ENOMEM); 1801 1802 fbi->dev = dev; 1803 fbi->inf = inf; 1804 1805 fbi->clk = devm_clk_get(dev, NULL); 1806 if (IS_ERR(fbi->clk)) 1807 return ERR_CAST(fbi->clk); 1808 1809 strcpy(fbi->fb.fix.id, PXA_NAME); 1810 1811 fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS; 1812 fbi->fb.fix.type_aux = 0; 1813 fbi->fb.fix.xpanstep = 0; 1814 fbi->fb.fix.ypanstep = 1; 1815 fbi->fb.fix.ywrapstep = 0; 1816 fbi->fb.fix.accel = FB_ACCEL_NONE; 1817 1818 fbi->fb.var.nonstd = 0; 1819 fbi->fb.var.activate = FB_ACTIVATE_NOW; 1820 fbi->fb.var.height = -1; 1821 fbi->fb.var.width = -1; 1822 fbi->fb.var.accel_flags = FB_ACCELF_TEXT; 1823 fbi->fb.var.vmode = FB_VMODE_NONINTERLACED; 1824 1825 fbi->fb.fbops = &pxafb_ops; 1826 fbi->fb.node = -1; 1827 1828 addr = fbi; 1829 addr = addr + sizeof(struct pxafb_info); 1830 fbi->fb.pseudo_palette = addr; 1831 1832 fbi->state = C_STARTUP; 1833 fbi->task_state = (u_char)-1; 1834 1835 pxafb_decode_mach_info(fbi, inf); 1836 1837#ifdef CONFIG_FB_PXA_OVERLAY 1838 /* place overlay(s) on top of base */ 1839 if (pxafb_overlay_supported()) 1840 fbi->lccr0 |= LCCR0_OUC; 1841#endif 1842 1843 init_waitqueue_head(&fbi->ctrlr_wait); 1844 INIT_WORK(&fbi->task, pxafb_task); 1845 mutex_init(&fbi->ctrlr_lock); 1846 init_completion(&fbi->disable_done); 1847 1848 return fbi; 1849} 1850 1851#ifdef CONFIG_FB_PXA_PARAMETERS 1852static int parse_opt_mode(struct device *dev, const char *this_opt, 1853 struct pxafb_mach_info *inf) 1854{ 1855 const char *name = this_opt+5; 1856 unsigned int namelen = strlen(name); 1857 int res_specified = 0, bpp_specified = 0; 1858 unsigned int xres = 0, yres = 0, bpp = 0; 1859 int yres_specified = 0; 1860 int i; 1861 for (i = namelen-1; i >= 0; i--) { 1862 switch (name[i]) { 1863 case '-': 1864 namelen = i; 1865 if (!bpp_specified && !yres_specified) { 1866 bpp = simple_strtoul(&name[i+1], NULL, 0); 1867 bpp_specified = 1; 1868 } else 1869 goto done; 1870 break; 1871 case 'x': 1872 if (!yres_specified) { 1873 yres = simple_strtoul(&name[i+1], NULL, 0); 1874 yres_specified = 1; 1875 } else 1876 goto done; 1877 break; 1878 case '0' ... '9': 1879 break; 1880 default: 1881 goto done; 1882 } 1883 } 1884 if (i < 0 && yres_specified) { 1885 xres = simple_strtoul(name, NULL, 0); 1886 res_specified = 1; 1887 } 1888done: 1889 if (res_specified) { 1890 dev_info(dev, "overriding resolution: %dx%d\n", xres, yres); 1891 inf->modes[0].xres = xres; inf->modes[0].yres = yres; 1892 } 1893 if (bpp_specified) 1894 switch (bpp) { 1895 case 1: 1896 case 2: 1897 case 4: 1898 case 8: 1899 case 16: 1900 inf->modes[0].bpp = bpp; 1901 dev_info(dev, "overriding bit depth: %d\n", bpp); 1902 break; 1903 default: 1904 dev_err(dev, "Depth %d is not valid\n", bpp); 1905 return -EINVAL; 1906 } 1907 return 0; 1908} 1909 1910static int parse_opt(struct device *dev, char *this_opt, 1911 struct pxafb_mach_info *inf) 1912{ 1913 struct pxafb_mode_info *mode = &inf->modes[0]; 1914 char s[64]; 1915 1916 s[0] = '\0'; 1917 1918 if (!strncmp(this_opt, "vmem:", 5)) { 1919 video_mem_size = memparse(this_opt + 5, NULL); 1920 } else if (!strncmp(this_opt, "mode:", 5)) { 1921 return parse_opt_mode(dev, this_opt, inf); 1922 } else if (!strncmp(this_opt, "pixclock:", 9)) { 1923 mode->pixclock = simple_strtoul(this_opt+9, NULL, 0); 1924 sprintf(s, "pixclock: %ld\n", mode->pixclock); 1925 } else if (!strncmp(this_opt, "left:", 5)) { 1926 mode->left_margin = simple_strtoul(this_opt+5, NULL, 0); 1927 sprintf(s, "left: %u\n", mode->left_margin); 1928 } else if (!strncmp(this_opt, "right:", 6)) { 1929 mode->right_margin = simple_strtoul(this_opt+6, NULL, 0); 1930 sprintf(s, "right: %u\n", mode->right_margin); 1931 } else if (!strncmp(this_opt, "upper:", 6)) { 1932 mode->upper_margin = simple_strtoul(this_opt+6, NULL, 0); 1933 sprintf(s, "upper: %u\n", mode->upper_margin); 1934 } else if (!strncmp(this_opt, "lower:", 6)) { 1935 mode->lower_margin = simple_strtoul(this_opt+6, NULL, 0); 1936 sprintf(s, "lower: %u\n", mode->lower_margin); 1937 } else if (!strncmp(this_opt, "hsynclen:", 9)) { 1938 mode->hsync_len = simple_strtoul(this_opt+9, NULL, 0); 1939 sprintf(s, "hsynclen: %u\n", mode->hsync_len); 1940 } else if (!strncmp(this_opt, "vsynclen:", 9)) { 1941 mode->vsync_len = simple_strtoul(this_opt+9, NULL, 0); 1942 sprintf(s, "vsynclen: %u\n", mode->vsync_len); 1943 } else if (!strncmp(this_opt, "hsync:", 6)) { 1944 if (simple_strtoul(this_opt+6, NULL, 0) == 0) { 1945 sprintf(s, "hsync: Active Low\n"); 1946 mode->sync &= ~FB_SYNC_HOR_HIGH_ACT; 1947 } else { 1948 sprintf(s, "hsync: Active High\n"); 1949 mode->sync |= FB_SYNC_HOR_HIGH_ACT; 1950 } 1951 } else if (!strncmp(this_opt, "vsync:", 6)) { 1952 if (simple_strtoul(this_opt+6, NULL, 0) == 0) { 1953 sprintf(s, "vsync: Active Low\n"); 1954 mode->sync &= ~FB_SYNC_VERT_HIGH_ACT; 1955 } else { 1956 sprintf(s, "vsync: Active High\n"); 1957 mode->sync |= FB_SYNC_VERT_HIGH_ACT; 1958 } 1959 } else if (!strncmp(this_opt, "dpc:", 4)) { 1960 if (simple_strtoul(this_opt+4, NULL, 0) == 0) { 1961 sprintf(s, "double pixel clock: false\n"); 1962 inf->lccr3 &= ~LCCR3_DPC; 1963 } else { 1964 sprintf(s, "double pixel clock: true\n"); 1965 inf->lccr3 |= LCCR3_DPC; 1966 } 1967 } else if (!strncmp(this_opt, "outputen:", 9)) { 1968 if (simple_strtoul(this_opt+9, NULL, 0) == 0) { 1969 sprintf(s, "output enable: active low\n"); 1970 inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnL; 1971 } else { 1972 sprintf(s, "output enable: active high\n"); 1973 inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnH; 1974 } 1975 } else if (!strncmp(this_opt, "pixclockpol:", 12)) { 1976 if (simple_strtoul(this_opt+12, NULL, 0) == 0) { 1977 sprintf(s, "pixel clock polarity: falling edge\n"); 1978 inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixFlEdg; 1979 } else { 1980 sprintf(s, "pixel clock polarity: rising edge\n"); 1981 inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixRsEdg; 1982 } 1983 } else if (!strncmp(this_opt, "color", 5)) { 1984 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color; 1985 } else if (!strncmp(this_opt, "mono", 4)) { 1986 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono; 1987 } else if (!strncmp(this_opt, "active", 6)) { 1988 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act; 1989 } else if (!strncmp(this_opt, "passive", 7)) { 1990 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas; 1991 } else if (!strncmp(this_opt, "single", 6)) { 1992 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl; 1993 } else if (!strncmp(this_opt, "dual", 4)) { 1994 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual; 1995 } else if (!strncmp(this_opt, "4pix", 4)) { 1996 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono; 1997 } else if (!strncmp(this_opt, "8pix", 4)) { 1998 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono; 1999 } else { 2000 dev_err(dev, "unknown option: %s\n", this_opt); 2001 return -EINVAL; 2002 } 2003 2004 if (s[0] != '\0') 2005 dev_info(dev, "override %s", s); 2006 2007 return 0; 2008} 2009 2010static int pxafb_parse_options(struct device *dev, char *options, 2011 struct pxafb_mach_info *inf) 2012{ 2013 char *this_opt; 2014 int ret; 2015 2016 if (!options || !*options) 2017 return 0; 2018 2019 dev_dbg(dev, "options are \"%s\"\n", options ? options : "null"); 2020 2021 /* could be made table driven or similar?... */ 2022 while ((this_opt = strsep(&options, ",")) != NULL) { 2023 ret = parse_opt(dev, this_opt, inf); 2024 if (ret) 2025 return ret; 2026 } 2027 return 0; 2028} 2029 2030static char g_options[256] = ""; 2031 2032#ifndef MODULE 2033static int __init pxafb_setup_options(void) 2034{ 2035 char *options = NULL; 2036 2037 if (fb_get_options("pxafb", &options)) 2038 return -ENODEV; 2039 2040 if (options) 2041 strscpy(g_options, options, sizeof(g_options)); 2042 2043 return 0; 2044} 2045#else 2046#define pxafb_setup_options() (0) 2047 2048module_param_string(options, g_options, sizeof(g_options), 0); 2049MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.rst)"); 2050#endif 2051 2052#else 2053#define pxafb_parse_options(...) (0) 2054#define pxafb_setup_options() (0) 2055#endif 2056 2057#ifdef DEBUG_VAR 2058/* Check for various illegal bit-combinations. Currently only 2059 * a warning is given. */ 2060static void pxafb_check_options(struct device *dev, struct pxafb_mach_info *inf) 2061{ 2062 if (inf->lcd_conn) 2063 return; 2064 2065 if (inf->lccr0 & LCCR0_INVALID_CONFIG_MASK) 2066 dev_warn(dev, "machine LCCR0 setting contains " 2067 "illegal bits: %08x\n", 2068 inf->lccr0 & LCCR0_INVALID_CONFIG_MASK); 2069 if (inf->lccr3 & LCCR3_INVALID_CONFIG_MASK) 2070 dev_warn(dev, "machine LCCR3 setting contains " 2071 "illegal bits: %08x\n", 2072 inf->lccr3 & LCCR3_INVALID_CONFIG_MASK); 2073 if (inf->lccr0 & LCCR0_DPD && 2074 ((inf->lccr0 & LCCR0_PAS) != LCCR0_Pas || 2075 (inf->lccr0 & LCCR0_SDS) != LCCR0_Sngl || 2076 (inf->lccr0 & LCCR0_CMS) != LCCR0_Mono)) 2077 dev_warn(dev, "Double Pixel Data (DPD) mode is " 2078 "only valid in passive mono" 2079 " single panel mode\n"); 2080 if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Act && 2081 (inf->lccr0 & LCCR0_SDS) == LCCR0_Dual) 2082 dev_warn(dev, "Dual panel only valid in passive mode\n"); 2083 if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Pas && 2084 (inf->modes->upper_margin || inf->modes->lower_margin)) 2085 dev_warn(dev, "Upper and lower margins must be 0 in " 2086 "passive mode\n"); 2087} 2088#else 2089#define pxafb_check_options(...) do {} while (0) 2090#endif 2091 2092#if defined(CONFIG_OF) 2093static const char * const lcd_types[] = { 2094 "unknown", "mono-stn", "mono-dstn", "color-stn", "color-dstn", 2095 "color-tft", "smart-panel", NULL 2096}; 2097 2098static int of_get_pxafb_display(struct device *dev, struct device_node *disp, 2099 struct pxafb_mach_info *info, u32 bus_width) 2100{ 2101 struct display_timings *timings; 2102 struct videomode vm; 2103 int i, ret = -EINVAL; 2104 const char *s; 2105 2106 ret = of_property_read_string(disp, "lcd-type", &s); 2107 if (ret) 2108 s = "color-tft"; 2109 2110 i = match_string(lcd_types, -1, s); 2111 if (i < 0) { 2112 dev_err(dev, "lcd-type %s is unknown\n", s); 2113 return i; 2114 } 2115 info->lcd_conn |= LCD_CONN_TYPE(i); 2116 info->lcd_conn |= LCD_CONN_WIDTH(bus_width); 2117 2118 timings = of_get_display_timings(disp); 2119 if (!timings) 2120 return -EINVAL; 2121 2122 ret = -ENOMEM; 2123 info->modes = devm_kcalloc(dev, timings->num_timings, 2124 sizeof(info->modes[0]), 2125 GFP_KERNEL); 2126 if (!info->modes) 2127 goto out; 2128 info->num_modes = timings->num_timings; 2129 2130 for (i = 0; i < timings->num_timings; i++) { 2131 ret = videomode_from_timings(timings, &vm, i); 2132 if (ret) { 2133 dev_err(dev, "videomode_from_timings %d failed: %d\n", 2134 i, ret); 2135 goto out; 2136 } 2137 if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 2138 info->lcd_conn |= LCD_PCLK_EDGE_RISE; 2139 if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 2140 info->lcd_conn |= LCD_PCLK_EDGE_FALL; 2141 if (vm.flags & DISPLAY_FLAGS_DE_HIGH) 2142 info->lcd_conn |= LCD_BIAS_ACTIVE_HIGH; 2143 if (vm.flags & DISPLAY_FLAGS_DE_LOW) 2144 info->lcd_conn |= LCD_BIAS_ACTIVE_LOW; 2145 if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH) 2146 info->modes[i].sync |= FB_SYNC_HOR_HIGH_ACT; 2147 if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH) 2148 info->modes[i].sync |= FB_SYNC_VERT_HIGH_ACT; 2149 2150 info->modes[i].pixclock = 1000000000UL / (vm.pixelclock / 1000); 2151 info->modes[i].xres = vm.hactive; 2152 info->modes[i].yres = vm.vactive; 2153 info->modes[i].hsync_len = vm.hsync_len; 2154 info->modes[i].left_margin = vm.hback_porch; 2155 info->modes[i].right_margin = vm.hfront_porch; 2156 info->modes[i].vsync_len = vm.vsync_len; 2157 info->modes[i].upper_margin = vm.vback_porch; 2158 info->modes[i].lower_margin = vm.vfront_porch; 2159 } 2160 ret = 0; 2161 2162out: 2163 display_timings_release(timings); 2164 return ret; 2165} 2166 2167static int of_get_pxafb_mode_info(struct device *dev, 2168 struct pxafb_mach_info *info) 2169{ 2170 struct device_node *display, *np; 2171 u32 bus_width; 2172 int ret, i; 2173 2174 np = of_graph_get_next_endpoint(dev->of_node, NULL); 2175 if (!np) { 2176 dev_err(dev, "could not find endpoint\n"); 2177 return -EINVAL; 2178 } 2179 ret = of_property_read_u32(np, "bus-width", &bus_width); 2180 if (ret) { 2181 dev_err(dev, "no bus-width specified: %d\n", ret); 2182 of_node_put(np); 2183 return ret; 2184 } 2185 2186 display = of_graph_get_remote_port_parent(np); 2187 of_node_put(np); 2188 if (!display) { 2189 dev_err(dev, "no display defined\n"); 2190 return -EINVAL; 2191 } 2192 2193 ret = of_get_pxafb_display(dev, display, info, bus_width); 2194 of_node_put(display); 2195 if (ret) 2196 return ret; 2197 2198 for (i = 0; i < info->num_modes; i++) 2199 info->modes[i].bpp = bus_width; 2200 2201 return 0; 2202} 2203 2204static struct pxafb_mach_info *of_pxafb_of_mach_info(struct device *dev) 2205{ 2206 int ret; 2207 struct pxafb_mach_info *info; 2208 2209 if (!dev->of_node) 2210 return NULL; 2211 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); 2212 if (!info) 2213 return ERR_PTR(-ENOMEM); 2214 ret = of_get_pxafb_mode_info(dev, info); 2215 if (ret) 2216 return ERR_PTR(ret); 2217 2218 /* 2219 * On purpose, neither lccrX registers nor video memory size can be 2220 * specified through device-tree, they are considered more a debug hack 2221 * available through command line. 2222 */ 2223 return info; 2224} 2225#else 2226static struct pxafb_mach_info *of_pxafb_of_mach_info(struct device *dev) 2227{ 2228 return NULL; 2229} 2230#endif 2231 2232static int pxafb_probe(struct platform_device *dev) 2233{ 2234 struct pxafb_info *fbi; 2235 struct pxafb_mach_info *inf, *pdata; 2236 int i, irq, ret; 2237 2238 dev_dbg(&dev->dev, "pxafb_probe\n"); 2239 2240 ret = -ENOMEM; 2241 pdata = dev_get_platdata(&dev->dev); 2242 inf = devm_kmalloc(&dev->dev, sizeof(*inf), GFP_KERNEL); 2243 if (!inf) 2244 goto failed; 2245 2246 if (pdata) { 2247 *inf = *pdata; 2248 inf->modes = 2249 devm_kmalloc_array(&dev->dev, pdata->num_modes, 2250 sizeof(inf->modes[0]), GFP_KERNEL); 2251 if (!inf->modes) 2252 goto failed; 2253 for (i = 0; i < inf->num_modes; i++) 2254 inf->modes[i] = pdata->modes[i]; 2255 } else { 2256 inf = of_pxafb_of_mach_info(&dev->dev); 2257 } 2258 2259 if (IS_ERR_OR_NULL(inf)) 2260 goto failed; 2261 2262 ret = pxafb_parse_options(&dev->dev, g_options, inf); 2263 if (ret < 0) 2264 goto failed; 2265 2266 pxafb_check_options(&dev->dev, inf); 2267 2268 dev_dbg(&dev->dev, "got a %dx%dx%d LCD\n", 2269 inf->modes->xres, 2270 inf->modes->yres, 2271 inf->modes->bpp); 2272 if (inf->modes->xres == 0 || 2273 inf->modes->yres == 0 || 2274 inf->modes->bpp == 0) { 2275 dev_err(&dev->dev, "Invalid resolution or bit depth\n"); 2276 ret = -EINVAL; 2277 goto failed; 2278 } 2279 2280 fbi = pxafb_init_fbinfo(&dev->dev, inf); 2281 if (IS_ERR(fbi)) { 2282 dev_err(&dev->dev, "Failed to initialize framebuffer device\n"); 2283 ret = PTR_ERR(fbi); 2284 goto failed; 2285 } 2286 2287 if (cpu_is_pxa3xx() && inf->acceleration_enabled) 2288 fbi->fb.fix.accel = FB_ACCEL_PXA3XX; 2289 2290 fbi->backlight_power = inf->pxafb_backlight_power; 2291 fbi->lcd_power = inf->pxafb_lcd_power; 2292 2293 fbi->lcd_supply = devm_regulator_get_optional(&dev->dev, "lcd"); 2294 if (IS_ERR(fbi->lcd_supply)) { 2295 if (PTR_ERR(fbi->lcd_supply) == -EPROBE_DEFER) 2296 return -EPROBE_DEFER; 2297 2298 fbi->lcd_supply = NULL; 2299 } 2300 2301 fbi->mmio_base = devm_platform_ioremap_resource(dev, 0); 2302 if (IS_ERR(fbi->mmio_base)) { 2303 dev_err(&dev->dev, "failed to get I/O memory\n"); 2304 ret = PTR_ERR(fbi->mmio_base); 2305 goto failed; 2306 } 2307 2308 fbi->dma_buff_size = PAGE_ALIGN(sizeof(struct pxafb_dma_buff)); 2309 fbi->dma_buff = dma_alloc_coherent(fbi->dev, fbi->dma_buff_size, 2310 &fbi->dma_buff_phys, GFP_KERNEL); 2311 if (fbi->dma_buff == NULL) { 2312 dev_err(&dev->dev, "failed to allocate memory for DMA\n"); 2313 ret = -ENOMEM; 2314 goto failed; 2315 } 2316 2317 ret = pxafb_init_video_memory(fbi); 2318 if (ret) { 2319 dev_err(&dev->dev, "Failed to allocate video RAM: %d\n", ret); 2320 ret = -ENOMEM; 2321 goto failed_free_dma; 2322 } 2323 2324 irq = platform_get_irq(dev, 0); 2325 if (irq < 0) { 2326 ret = -ENODEV; 2327 goto failed_free_mem; 2328 } 2329 2330 ret = devm_request_irq(&dev->dev, irq, pxafb_handle_irq, 0, "LCD", fbi); 2331 if (ret) { 2332 dev_err(&dev->dev, "request_irq failed: %d\n", ret); 2333 ret = -EBUSY; 2334 goto failed_free_mem; 2335 } 2336 2337 ret = pxafb_smart_init(fbi); 2338 if (ret) { 2339 dev_err(&dev->dev, "failed to initialize smartpanel\n"); 2340 goto failed_free_mem; 2341 } 2342 2343 /* 2344 * This makes sure that our colour bitfield 2345 * descriptors are correctly initialised. 2346 */ 2347 ret = pxafb_check_var(&fbi->fb.var, &fbi->fb); 2348 if (ret) { 2349 dev_err(&dev->dev, "failed to get suitable mode\n"); 2350 goto failed_free_mem; 2351 } 2352 2353 ret = pxafb_set_par(&fbi->fb); 2354 if (ret) { 2355 dev_err(&dev->dev, "Failed to set parameters\n"); 2356 goto failed_free_mem; 2357 } 2358 2359 platform_set_drvdata(dev, fbi); 2360 2361 ret = register_framebuffer(&fbi->fb); 2362 if (ret < 0) { 2363 dev_err(&dev->dev, 2364 "Failed to register framebuffer device: %d\n", ret); 2365 goto failed_free_cmap; 2366 } 2367 2368 pxafb_overlay_init(fbi); 2369 2370#ifdef CONFIG_CPU_FREQ 2371 fbi->freq_transition.notifier_call = pxafb_freq_transition; 2372 cpufreq_register_notifier(&fbi->freq_transition, 2373 CPUFREQ_TRANSITION_NOTIFIER); 2374#endif 2375 2376 /* 2377 * Ok, now enable the LCD controller 2378 */ 2379 set_ctrlr_state(fbi, C_ENABLE); 2380 2381 return 0; 2382 2383failed_free_cmap: 2384 if (fbi->fb.cmap.len) 2385 fb_dealloc_cmap(&fbi->fb.cmap); 2386failed_free_mem: 2387 free_pages_exact(fbi->video_mem, fbi->video_mem_size); 2388failed_free_dma: 2389 dma_free_coherent(&dev->dev, fbi->dma_buff_size, 2390 fbi->dma_buff, fbi->dma_buff_phys); 2391failed: 2392 return ret; 2393} 2394 2395static void pxafb_remove(struct platform_device *dev) 2396{ 2397 struct pxafb_info *fbi = platform_get_drvdata(dev); 2398 struct fb_info *info; 2399 2400 if (!fbi) 2401 return; 2402 2403 info = &fbi->fb; 2404 2405 pxafb_overlay_exit(fbi); 2406 unregister_framebuffer(info); 2407 2408 pxafb_disable_controller(fbi); 2409 2410 if (fbi->fb.cmap.len) 2411 fb_dealloc_cmap(&fbi->fb.cmap); 2412 2413 free_pages_exact(fbi->video_mem, fbi->video_mem_size); 2414 2415 dma_free_coherent(&dev->dev, fbi->dma_buff_size, fbi->dma_buff, 2416 fbi->dma_buff_phys); 2417} 2418 2419static const struct of_device_id pxafb_of_dev_id[] = { 2420 { .compatible = "marvell,pxa270-lcdc", }, 2421 { .compatible = "marvell,pxa300-lcdc", }, 2422 { .compatible = "marvell,pxa2xx-lcdc", }, 2423 { /* sentinel */ } 2424}; 2425MODULE_DEVICE_TABLE(of, pxafb_of_dev_id); 2426 2427static struct platform_driver pxafb_driver = { 2428 .probe = pxafb_probe, 2429 .remove_new = pxafb_remove, 2430 .driver = { 2431 .name = "pxa2xx-fb", 2432 .of_match_table = pxafb_of_dev_id, 2433#ifdef CONFIG_PM 2434 .pm = &pxafb_pm_ops, 2435#endif 2436 }, 2437}; 2438 2439static int __init pxafb_init(void) 2440{ 2441 if (pxafb_setup_options()) 2442 return -EINVAL; 2443 2444 return platform_driver_register(&pxafb_driver); 2445} 2446 2447static void __exit pxafb_exit(void) 2448{ 2449 platform_driver_unregister(&pxafb_driver); 2450} 2451 2452module_init(pxafb_init); 2453module_exit(pxafb_exit); 2454 2455MODULE_DESCRIPTION("loadable framebuffer driver for PXA"); 2456MODULE_LICENSE("GPL"); 2457