1 /* 2 * BRIEF MODULE DESCRIPTION 3 * Au1100 LCD Driver. 4 * 5 * Rewritten for 2.6 by Embedded Alley Solutions 6 * <source@embeddedalley.com>, based on submissions by 7 * Karl Lessard <klessard@sunrisetelecom.com> 8 * <c.pellegrin@exadron.com> 9 * 10 * PM support added by Rodolfo Giometti <giometti@linux.it> 11 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it> 12 * 13 * Copyright 2002 MontaVista Software 14 * Author: MontaVista Software, Inc. 15 * ppopov@mvista.com or source@mvista.com 16 * 17 * Copyright 2002 Alchemy Semiconductor 18 * Author: Alchemy Semiconductor 19 * 20 * Based on: 21 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device 22 * Created 28 Dec 1997 by Geert Uytterhoeven 23 * 24 * This program is free software; you can redistribute it and/or modify it 25 * under the terms of the GNU General Public License as published by the 26 * Free Software Foundation; either version 2 of the License, or (at your 27 * option) any later version. 28 * 29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 30 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 31 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 32 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 35 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 36 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * You should have received a copy of the GNU General Public License along 41 * with this program; if not, write to the Free Software Foundation, Inc., 42 * 675 Mass Ave, Cambridge, MA 02139, USA. 43 */ 44 #include <linux/module.h> 45 #include <linux/kernel.h> 46 #include <linux/errno.h> 47 #include <linux/string.h> 48 #include <linux/mm.h> 49 #include <linux/fb.h> 50 #include <linux/init.h> 51 #include <linux/interrupt.h> 52 #include <linux/ctype.h> 53 #include <linux/dma-mapping.h> 54 #include <linux/platform_device.h> 55 #include <linux/slab.h> 56 57 #include <asm/mach-au1x00/au1000.h> 58 59 #define DEBUG 0 60 61 #include "au1100fb.h" 62 63 #define DRIVER_NAME "au1100fb" 64 #define DRIVER_DESC "LCD controller driver for AU1100 processors" 65 66 #define to_au1100fb_device(_info) \ 67 (_info ? container_of(_info, struct au1100fb_device, info) : NULL); 68 69 /* Bitfields format supported by the controller. Note that the order of formats 70 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the 71 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF] 72 */ 73 struct fb_bitfield rgb_bitfields[][4] = 74 { 75 /* Red, Green, Blue, Transp */ 76 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, 77 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, 78 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } }, 79 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } }, 80 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } }, 81 82 /* The last is used to describe 12bpp format */ 83 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } }, 84 }; 85 86 static struct fb_fix_screeninfo au1100fb_fix = { 87 .id = "AU1100 FB", 88 .xpanstep = 1, 89 .ypanstep = 1, 90 .type = FB_TYPE_PACKED_PIXELS, 91 .accel = FB_ACCEL_NONE, 92 }; 93 94 static struct fb_var_screeninfo au1100fb_var = { 95 .activate = FB_ACTIVATE_NOW, 96 .height = -1, 97 .width = -1, 98 .vmode = FB_VMODE_NONINTERLACED, 99 }; 100 101 /* fb_blank 102 * Blank the screen. Depending on the mode, the screen will be 103 * activated with the backlight color, or desactivated 104 */ 105 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi) 106 { 107 struct au1100fb_device *fbdev = to_au1100fb_device(fbi); 108 109 print_dbg("fb_blank %d %p", blank_mode, fbi); 110 111 switch (blank_mode) { 112 113 case VESA_NO_BLANKING: 114 /* Turn on panel */ 115 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 116 au_sync(); 117 break; 118 119 case VESA_VSYNC_SUSPEND: 120 case VESA_HSYNC_SUSPEND: 121 case VESA_POWERDOWN: 122 /* Turn off panel */ 123 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 124 au_sync(); 125 break; 126 default: 127 break; 128 129 } 130 return 0; 131 } 132 133 /* 134 * Set hardware with var settings. This will enable the controller with a specific 135 * mode, normally validated with the fb_check_var method 136 */ 137 int au1100fb_setmode(struct au1100fb_device *fbdev) 138 { 139 struct fb_info *info = &fbdev->info; 140 u32 words; 141 int index; 142 143 if (!fbdev) 144 return -EINVAL; 145 146 /* Update var-dependent FB info */ 147 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) { 148 if (info->var.bits_per_pixel <= 8) { 149 /* palettized */ 150 info->var.red.offset = 0; 151 info->var.red.length = info->var.bits_per_pixel; 152 info->var.red.msb_right = 0; 153 154 info->var.green.offset = 0; 155 info->var.green.length = info->var.bits_per_pixel; 156 info->var.green.msb_right = 0; 157 158 info->var.blue.offset = 0; 159 info->var.blue.length = info->var.bits_per_pixel; 160 info->var.blue.msb_right = 0; 161 162 info->var.transp.offset = 0; 163 info->var.transp.length = 0; 164 info->var.transp.msb_right = 0; 165 166 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 167 info->fix.line_length = info->var.xres_virtual / 168 (8/info->var.bits_per_pixel); 169 } else { 170 /* non-palettized */ 171 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT; 172 info->var.red = rgb_bitfields[index][0]; 173 info->var.green = rgb_bitfields[index][1]; 174 info->var.blue = rgb_bitfields[index][2]; 175 info->var.transp = rgb_bitfields[index][3]; 176 177 info->fix.visual = FB_VISUAL_TRUECOLOR; 178 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */ 179 } 180 } else { 181 /* mono */ 182 info->fix.visual = FB_VISUAL_MONO10; 183 info->fix.line_length = info->var.xres_virtual / 8; 184 } 185 186 info->screen_size = info->fix.line_length * info->var.yres_virtual; 187 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \ 188 >> LCD_CONTROL_SM_BIT) * 90; 189 190 /* Determine BPP mode and format */ 191 fbdev->regs->lcd_control = fbdev->panel->control_base; 192 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming; 193 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming; 194 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base; 195 fbdev->regs->lcd_intenable = 0; 196 fbdev->regs->lcd_intstatus = 0; 197 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys); 198 199 if (panel_is_dual(fbdev->panel)) { 200 /* Second panel display seconf half of screen if possible, 201 * otherwise display the same as the first panel */ 202 if (info->var.yres_virtual >= (info->var.yres << 1)) { 203 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys + 204 (info->fix.line_length * 205 (info->var.yres_virtual >> 1))); 206 } else { 207 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys); 208 } 209 } 210 211 words = info->fix.line_length / sizeof(u32); 212 if (!info->var.rotate || (info->var.rotate == 180)) { 213 words *= info->var.yres_virtual; 214 if (info->var.rotate /* 180 */) { 215 words -= (words % 8); /* should be divisable by 8 */ 216 } 217 } 218 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words); 219 220 fbdev->regs->lcd_pwmdiv = 0; 221 fbdev->regs->lcd_pwmhi = 0; 222 223 /* Resume controller */ 224 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 225 mdelay(10); 226 au1100fb_fb_blank(VESA_NO_BLANKING, info); 227 228 return 0; 229 } 230 231 /* fb_setcolreg 232 * Set color in LCD palette. 233 */ 234 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi) 235 { 236 struct au1100fb_device *fbdev; 237 u32 *palette; 238 u32 value; 239 240 fbdev = to_au1100fb_device(fbi); 241 palette = fbdev->regs->lcd_pallettebase; 242 243 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1)) 244 return -EINVAL; 245 246 if (fbi->var.grayscale) { 247 /* Convert color to grayscale */ 248 red = green = blue = 249 (19595 * red + 38470 * green + 7471 * blue) >> 16; 250 } 251 252 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) { 253 /* Place color in the pseudopalette */ 254 if (regno > 16) 255 return -EINVAL; 256 257 palette = (u32*)fbi->pseudo_palette; 258 259 red >>= (16 - fbi->var.red.length); 260 green >>= (16 - fbi->var.green.length); 261 blue >>= (16 - fbi->var.blue.length); 262 263 value = (red << fbi->var.red.offset) | 264 (green << fbi->var.green.offset)| 265 (blue << fbi->var.blue.offset); 266 value &= 0xFFFF; 267 268 } else if (panel_is_active(fbdev->panel)) { 269 /* COLOR TFT PALLETTIZED (use RGB 565) */ 270 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F); 271 value &= 0xFFFF; 272 273 } else if (panel_is_color(fbdev->panel)) { 274 /* COLOR STN MODE */ 275 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) | 276 ((green >> 8) & 0x00F0) | 277 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00); 278 value &= 0xFFF; 279 } else { 280 /* MONOCHROME MODE */ 281 value = (green >> 12) & 0x000F; 282 value &= 0xF; 283 } 284 285 palette[regno] = value; 286 287 return 0; 288 } 289 290 /* fb_pan_display 291 * Pan display in x and/or y as specified 292 */ 293 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi) 294 { 295 struct au1100fb_device *fbdev; 296 int dy; 297 298 fbdev = to_au1100fb_device(fbi); 299 300 print_dbg("fb_pan_display %p %p", var, fbi); 301 302 if (!var || !fbdev) { 303 return -EINVAL; 304 } 305 306 if (var->xoffset - fbi->var.xoffset) { 307 /* No support for X panning for now! */ 308 return -EINVAL; 309 } 310 311 print_dbg("fb_pan_display 2 %p %p", var, fbi); 312 dy = var->yoffset - fbi->var.yoffset; 313 if (dy) { 314 315 u32 dmaaddr; 316 317 print_dbg("Panning screen of %d lines", dy); 318 319 dmaaddr = fbdev->regs->lcd_dmaaddr0; 320 dmaaddr += (fbi->fix.line_length * dy); 321 322 /* TODO: Wait for current frame to finished */ 323 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); 324 325 if (panel_is_dual(fbdev->panel)) { 326 dmaaddr = fbdev->regs->lcd_dmaaddr1; 327 dmaaddr += (fbi->fix.line_length * dy); 328 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); 329 } 330 } 331 print_dbg("fb_pan_display 3 %p %p", var, fbi); 332 333 return 0; 334 } 335 336 /* fb_rotate 337 * Rotate the display of this angle. This doesn't seems to be used by the core, 338 * but as our hardware supports it, so why not implementing it... 339 */ 340 void au1100fb_fb_rotate(struct fb_info *fbi, int angle) 341 { 342 struct au1100fb_device *fbdev = to_au1100fb_device(fbi); 343 344 print_dbg("fb_rotate %p %d", fbi, angle); 345 346 if (fbdev && (angle > 0) && !(angle % 90)) { 347 348 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 349 350 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK); 351 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT); 352 353 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 354 } 355 } 356 357 /* fb_mmap 358 * Map video memory in user space. We don't use the generic fb_mmap method mainly 359 * to allow the use of the TLB streaming flag (CCA=6) 360 */ 361 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma) 362 { 363 struct au1100fb_device *fbdev; 364 365 fbdev = to_au1100fb_device(fbi); 366 367 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 368 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 369 370 return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len); 371 } 372 373 static struct fb_ops au1100fb_ops = 374 { 375 .owner = THIS_MODULE, 376 .fb_setcolreg = au1100fb_fb_setcolreg, 377 .fb_blank = au1100fb_fb_blank, 378 .fb_pan_display = au1100fb_fb_pan_display, 379 .fb_fillrect = cfb_fillrect, 380 .fb_copyarea = cfb_copyarea, 381 .fb_imageblit = cfb_imageblit, 382 .fb_rotate = au1100fb_fb_rotate, 383 .fb_mmap = au1100fb_fb_mmap, 384 }; 385 386 387 /*-------------------------------------------------------------------------*/ 388 389 static int au1100fb_setup(struct au1100fb_device *fbdev) 390 { 391 char *this_opt, *options; 392 int num_panels = ARRAY_SIZE(known_lcd_panels); 393 394 if (num_panels <= 0) { 395 print_err("No LCD panels supported by driver!"); 396 return -ENODEV; 397 } 398 399 if (fb_get_options(DRIVER_NAME, &options)) 400 return -ENODEV; 401 if (!options) 402 return -ENODEV; 403 404 while ((this_opt = strsep(&options, ",")) != NULL) { 405 /* Panel option */ 406 if (!strncmp(this_opt, "panel:", 6)) { 407 int i; 408 this_opt += 6; 409 for (i = 0; i < num_panels; i++) { 410 if (!strncmp(this_opt, known_lcd_panels[i].name, 411 strlen(this_opt))) { 412 fbdev->panel = &known_lcd_panels[i]; 413 fbdev->panel_idx = i; 414 break; 415 } 416 } 417 if (i >= num_panels) { 418 print_warn("Panel '%s' not supported!", this_opt); 419 return -ENODEV; 420 } 421 } 422 /* Unsupported option */ 423 else 424 print_warn("Unsupported option \"%s\"", this_opt); 425 } 426 427 print_info("Panel=%s", fbdev->panel->name); 428 429 return 0; 430 } 431 432 static int au1100fb_drv_probe(struct platform_device *dev) 433 { 434 struct au1100fb_device *fbdev = NULL; 435 struct resource *regs_res; 436 unsigned long page; 437 u32 sys_clksrc; 438 439 /* Allocate new device private */ 440 fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device), 441 GFP_KERNEL); 442 if (!fbdev) { 443 print_err("fail to allocate device private record"); 444 return -ENOMEM; 445 } 446 447 if (au1100fb_setup(fbdev)) 448 goto failed; 449 450 platform_set_drvdata(dev, (void *)fbdev); 451 452 /* Allocate region for our registers and map them */ 453 regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0); 454 if (!regs_res) { 455 print_err("fail to retrieve registers resource"); 456 return -EFAULT; 457 } 458 459 au1100fb_fix.mmio_start = regs_res->start; 460 au1100fb_fix.mmio_len = resource_size(regs_res); 461 462 if (!devm_request_mem_region(&dev->dev, 463 au1100fb_fix.mmio_start, 464 au1100fb_fix.mmio_len, 465 DRIVER_NAME)) { 466 print_err("fail to lock memory region at 0x%08lx", 467 au1100fb_fix.mmio_start); 468 return -EBUSY; 469 } 470 471 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start); 472 473 print_dbg("Register memory map at %p", fbdev->regs); 474 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len); 475 476 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */ 477 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres * 478 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS; 479 480 fbdev->fb_mem = dmam_alloc_coherent(&dev->dev, 481 PAGE_ALIGN(fbdev->fb_len), 482 &fbdev->fb_phys, GFP_KERNEL); 483 if (!fbdev->fb_mem) { 484 print_err("fail to allocate frambuffer (size: %dK))", 485 fbdev->fb_len / 1024); 486 return -ENOMEM; 487 } 488 489 au1100fb_fix.smem_start = fbdev->fb_phys; 490 au1100fb_fix.smem_len = fbdev->fb_len; 491 492 /* 493 * Set page reserved so that mmap will work. This is necessary 494 * since we'll be remapping normal memory. 495 */ 496 for (page = (unsigned long)fbdev->fb_mem; 497 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len); 498 page += PAGE_SIZE) { 499 #ifdef CONFIG_DMA_NONCOHERENT 500 SetPageReserved(virt_to_page(CAC_ADDR((void *)page))); 501 #else 502 SetPageReserved(virt_to_page(page)); 503 #endif 504 } 505 506 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem); 507 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024); 508 509 /* Setup LCD clock to AUX (48 MHz) */ 510 sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL); 511 au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC); 512 513 /* load the panel info into the var struct */ 514 au1100fb_var.bits_per_pixel = fbdev->panel->bpp; 515 au1100fb_var.xres = fbdev->panel->xres; 516 au1100fb_var.xres_virtual = au1100fb_var.xres; 517 au1100fb_var.yres = fbdev->panel->yres; 518 au1100fb_var.yres_virtual = au1100fb_var.yres; 519 520 fbdev->info.screen_base = fbdev->fb_mem; 521 fbdev->info.fbops = &au1100fb_ops; 522 fbdev->info.fix = au1100fb_fix; 523 524 fbdev->info.pseudo_palette = 525 devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL); 526 if (!fbdev->info.pseudo_palette) 527 return -ENOMEM; 528 529 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) { 530 print_err("Fail to allocate colormap (%d entries)", 531 AU1100_LCD_NBR_PALETTE_ENTRIES); 532 return -EFAULT; 533 } 534 535 fbdev->info.var = au1100fb_var; 536 537 /* Set h/w registers */ 538 au1100fb_setmode(fbdev); 539 540 /* Register new framebuffer */ 541 if (register_framebuffer(&fbdev->info) < 0) { 542 print_err("cannot register new framebuffer"); 543 goto failed; 544 } 545 546 return 0; 547 548 failed: 549 if (fbdev->fb_mem) { 550 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem, 551 fbdev->fb_phys); 552 } 553 if (fbdev->info.cmap.len != 0) { 554 fb_dealloc_cmap(&fbdev->info.cmap); 555 } 556 557 return -ENODEV; 558 } 559 560 int au1100fb_drv_remove(struct platform_device *dev) 561 { 562 struct au1100fb_device *fbdev = NULL; 563 564 if (!dev) 565 return -ENODEV; 566 567 fbdev = platform_get_drvdata(dev); 568 569 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) 570 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); 571 #endif 572 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 573 574 /* Clean up all probe data */ 575 unregister_framebuffer(&fbdev->info); 576 577 fb_dealloc_cmap(&fbdev->info.cmap); 578 579 return 0; 580 } 581 582 #ifdef CONFIG_PM 583 static u32 sys_clksrc; 584 static struct au1100fb_regs fbregs; 585 586 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state) 587 { 588 struct au1100fb_device *fbdev = platform_get_drvdata(dev); 589 590 if (!fbdev) 591 return 0; 592 593 /* Save the clock source state */ 594 sys_clksrc = au_readl(SYS_CLKSRC); 595 596 /* Blank the LCD */ 597 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); 598 599 /* Stop LCD clocking */ 600 au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC); 601 602 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); 603 604 return 0; 605 } 606 607 int au1100fb_drv_resume(struct platform_device *dev) 608 { 609 struct au1100fb_device *fbdev = platform_get_drvdata(dev); 610 611 if (!fbdev) 612 return 0; 613 614 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs)); 615 616 /* Restart LCD clocking */ 617 au_writel(sys_clksrc, SYS_CLKSRC); 618 619 /* Unblank the LCD */ 620 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info); 621 622 return 0; 623 } 624 #else 625 #define au1100fb_drv_suspend NULL 626 #define au1100fb_drv_resume NULL 627 #endif 628 629 static struct platform_driver au1100fb_driver = { 630 .driver = { 631 .name = "au1100-lcd", 632 .owner = THIS_MODULE, 633 }, 634 .probe = au1100fb_drv_probe, 635 .remove = au1100fb_drv_remove, 636 .suspend = au1100fb_drv_suspend, 637 .resume = au1100fb_drv_resume, 638 }; 639 module_platform_driver(au1100fb_driver); 640 641 MODULE_DESCRIPTION(DRIVER_DESC); 642 MODULE_LICENSE("GPL"); 643