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 56#include <asm/mach-au1x00/au1000.h> 57 58#define DEBUG 0 59 60#include "au1100fb.h" 61 62/* 63 * Sanity check. If this is a new Au1100 based board, search for 64 * the PB1100 ifdefs to make sure you modify the code accordingly. 65 */ 66#if defined(CONFIG_MIPS_PB1100) 67 #include <asm/mach-pb1x00/pb1100.h> 68#elif defined(CONFIG_MIPS_DB1100) 69 #include <asm/mach-db1x00/db1x00.h> 70#else 71 #error "Unknown Au1100 board, Au1100 FB driver not supported" 72#endif 73 74#define DRIVER_NAME "au1100fb" 75#define DRIVER_DESC "LCD controller driver for AU1100 processors" 76 77#define to_au1100fb_device(_info) \ 78 (_info ? container_of(_info, struct au1100fb_device, info) : NULL); 79 80/* Bitfields format supported by the controller. Note that the order of formats 81 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the 82 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF] 83 */ 84struct fb_bitfield rgb_bitfields[][4] = 85{ 86 /* Red, Green, Blue, Transp */ 87 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, 88 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, 89 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } }, 90 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } }, 91 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } }, 92 93 /* The last is used to describe 12bpp format */ 94 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } }, 95}; 96 97static struct fb_fix_screeninfo au1100fb_fix __initdata = { 98 .id = "AU1100 FB", 99 .xpanstep = 1, 100 .ypanstep = 1, 101 .type = FB_TYPE_PACKED_PIXELS, 102 .accel = FB_ACCEL_NONE, 103}; 104 105static struct fb_var_screeninfo au1100fb_var __initdata = { 106 .activate = FB_ACTIVATE_NOW, 107 .height = -1, 108 .width = -1, 109 .vmode = FB_VMODE_NONINTERLACED, 110}; 111 112static struct au1100fb_drv_info drv_info; 113 114static int nocursor = 0; 115module_param(nocursor, int, 0644); 116MODULE_PARM_DESC(nocursor, "cursor enable/disable"); 117 118/* 119 * Set hardware with var settings. This will enable the controller with a specific 120 * mode, normally validated with the fb_check_var method 121 */ 122int au1100fb_setmode(struct au1100fb_device *fbdev) 123{ 124 struct fb_info *info = &fbdev->info; 125 u32 words; 126 int index; 127 128 if (!fbdev) 129 return -EINVAL; 130 131 /* Update var-dependent FB info */ 132 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) { 133 if (info->var.bits_per_pixel <= 8) { 134 /* palettized */ 135 info->var.red.offset = 0; 136 info->var.red.length = info->var.bits_per_pixel; 137 info->var.red.msb_right = 0; 138 139 info->var.green.offset = 0; 140 info->var.green.length = info->var.bits_per_pixel; 141 info->var.green.msb_right = 0; 142 143 info->var.blue.offset = 0; 144 info->var.blue.length = info->var.bits_per_pixel; 145 info->var.blue.msb_right = 0; 146 147 info->var.transp.offset = 0; 148 info->var.transp.length = 0; 149 info->var.transp.msb_right = 0; 150 151 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 152 info->fix.line_length = info->var.xres_virtual / 153 (8/info->var.bits_per_pixel); 154 } else { 155 /* non-palettized */ 156 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT; 157 info->var.red = rgb_bitfields[index][0]; 158 info->var.green = rgb_bitfields[index][1]; 159 info->var.blue = rgb_bitfields[index][2]; 160 info->var.transp = rgb_bitfields[index][3]; 161 162 info->fix.visual = FB_VISUAL_TRUECOLOR; 163 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */ 164 } 165 } else { 166 /* mono */ 167 info->fix.visual = FB_VISUAL_MONO10; 168 info->fix.line_length = info->var.xres_virtual / 8; 169 } 170 171 info->screen_size = info->fix.line_length * info->var.yres_virtual; 172 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \ 173 >> LCD_CONTROL_SM_BIT) * 90; 174 175 /* Determine BPP mode and format */ 176 fbdev->regs->lcd_control = fbdev->panel->control_base; 177 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming; 178 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming; 179 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base; 180 fbdev->regs->lcd_intenable = 0; 181 fbdev->regs->lcd_intstatus = 0; 182 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys); 183 184 if (panel_is_dual(fbdev->panel)) { 185 /* Second panel display seconf half of screen if possible, 186 * otherwise display the same as the first panel */ 187 if (info->var.yres_virtual >= (info->var.yres << 1)) { 188 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys + 189 (info->fix.line_length * 190 (info->var.yres_virtual >> 1))); 191 } else { 192 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys); 193 } 194 } 195 196 words = info->fix.line_length / sizeof(u32); 197 if (!info->var.rotate || (info->var.rotate == 180)) { 198 words *= info->var.yres_virtual; 199 if (info->var.rotate /* 180 */) { 200 words -= (words % 8); /* should be divisable by 8 */ 201 } 202 } 203 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words); 204 205 fbdev->regs->lcd_pwmdiv = 0; 206 fbdev->regs->lcd_pwmhi = 0; 207 208 /* Resume controller */ 209 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 210 mdelay(10); 211 au1100fb_fb_blank(VESA_NO_BLANKING, info); 212 213 return 0; 214} 215 216/* fb_setcolreg 217 * Set color in LCD palette. 218 */ 219int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi) 220{ 221 struct au1100fb_device *fbdev; 222 u32 *palette; 223 u32 value; 224 225 fbdev = to_au1100fb_device(fbi); 226 palette = fbdev->regs->lcd_pallettebase; 227 228 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1)) 229 return -EINVAL; 230 231 if (fbi->var.grayscale) { 232 /* Convert color to grayscale */ 233 red = green = blue = 234 (19595 * red + 38470 * green + 7471 * blue) >> 16; 235 } 236 237 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) { 238 /* Place color in the pseudopalette */ 239 if (regno > 16) 240 return -EINVAL; 241 242 palette = (u32*)fbi->pseudo_palette; 243 244 red >>= (16 - fbi->var.red.length); 245 green >>= (16 - fbi->var.green.length); 246 blue >>= (16 - fbi->var.blue.length); 247 248 value = (red << fbi->var.red.offset) | 249 (green << fbi->var.green.offset)| 250 (blue << fbi->var.blue.offset); 251 value &= 0xFFFF; 252 253 } else if (panel_is_active(fbdev->panel)) { 254 /* COLOR TFT PALLETTIZED (use RGB 565) */ 255 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F); 256 value &= 0xFFFF; 257 258 } else if (panel_is_color(fbdev->panel)) { 259 /* COLOR STN MODE */ 260 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) | 261 ((green >> 8) & 0x00F0) | 262 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00); 263 value &= 0xFFF; 264 } else { 265 /* MONOCHROME MODE */ 266 value = (green >> 12) & 0x000F; 267 value &= 0xF; 268 } 269 270 palette[regno] = value; 271 272 return 0; 273} 274 275/* fb_blank 276 * Blank the screen. Depending on the mode, the screen will be 277 * activated with the backlight color, or desactivated 278 */ 279int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi) 280{ 281 struct au1100fb_device *fbdev = to_au1100fb_device(fbi); 282 283 print_dbg("fb_blank %d %p", blank_mode, fbi); 284 285 switch (blank_mode) { 286 287 case VESA_NO_BLANKING: 288 /* Turn on panel */ 289 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 290#ifdef CONFIG_MIPS_PB1100 291 if (drv_info.panel_idx == 1) { 292 au_writew(au_readw(PB1100_G_CONTROL) 293 | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD), 294 PB1100_G_CONTROL); 295 } 296#endif 297 au_sync(); 298 break; 299 300 case VESA_VSYNC_SUSPEND: 301 case VESA_HSYNC_SUSPEND: 302 case VESA_POWERDOWN: 303 /* Turn off panel */ 304 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 305#ifdef CONFIG_MIPS_PB1100 306 if (drv_info.panel_idx == 1) { 307 au_writew(au_readw(PB1100_G_CONTROL) 308 & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD), 309 PB1100_G_CONTROL); 310 } 311#endif 312 au_sync(); 313 break; 314 default: 315 break; 316 317 } 318 return 0; 319} 320 321/* fb_pan_display 322 * Pan display in x and/or y as specified 323 */ 324int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi) 325{ 326 struct au1100fb_device *fbdev; 327 int dy; 328 329 fbdev = to_au1100fb_device(fbi); 330 331 print_dbg("fb_pan_display %p %p", var, fbi); 332 333 if (!var || !fbdev) { 334 return -EINVAL; 335 } 336 337 if (var->xoffset - fbi->var.xoffset) { 338 /* No support for X panning for now! */ 339 return -EINVAL; 340 } 341 342 print_dbg("fb_pan_display 2 %p %p", var, fbi); 343 dy = var->yoffset - fbi->var.yoffset; 344 if (dy) { 345 346 u32 dmaaddr; 347 348 print_dbg("Panning screen of %d lines", dy); 349 350 dmaaddr = fbdev->regs->lcd_dmaaddr0; 351 dmaaddr += (fbi->fix.line_length * dy); 352 353 /* TODO: Wait for current frame to finished */ 354 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); 355 356 if (panel_is_dual(fbdev->panel)) { 357 dmaaddr = fbdev->regs->lcd_dmaaddr1; 358 dmaaddr += (fbi->fix.line_length * dy); 359 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); 360 } 361 } 362 print_dbg("fb_pan_display 3 %p %p", var, fbi); 363 364 return 0; 365} 366 367/* fb_rotate 368 * Rotate the display of this angle. This doesn't seems to be used by the core, 369 * but as our hardware supports it, so why not implementing it... 370 */ 371void au1100fb_fb_rotate(struct fb_info *fbi, int angle) 372{ 373 struct au1100fb_device *fbdev = to_au1100fb_device(fbi); 374 375 print_dbg("fb_rotate %p %d", fbi, angle); 376 377 if (fbdev && (angle > 0) && !(angle % 90)) { 378 379 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 380 381 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK); 382 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT); 383 384 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 385 } 386} 387 388/* fb_mmap 389 * Map video memory in user space. We don't use the generic fb_mmap method mainly 390 * to allow the use of the TLB streaming flag (CCA=6) 391 */ 392int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma) 393{ 394 struct au1100fb_device *fbdev; 395 unsigned int len; 396 unsigned long start=0, off; 397 398 fbdev = to_au1100fb_device(fbi); 399 400 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) { 401 return -EINVAL; 402 } 403 404 start = fbdev->fb_phys & PAGE_MASK; 405 len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len); 406 407 off = vma->vm_pgoff << PAGE_SHIFT; 408 409 if ((vma->vm_end - vma->vm_start + off) > len) { 410 return -EINVAL; 411 } 412 413 off += start; 414 vma->vm_pgoff = off >> PAGE_SHIFT; 415 416 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 417 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 418 419 vma->vm_flags |= VM_IO; 420 421 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, 422 vma->vm_end - vma->vm_start, 423 vma->vm_page_prot)) { 424 return -EAGAIN; 425 } 426 427 return 0; 428} 429 430/* fb_cursor 431 * Used to disable cursor drawing... 432 */ 433int au1100fb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor) 434{ 435 if (nocursor) 436 return 0; 437 else 438 return -EINVAL; /* just to force soft_cursor() call */ 439} 440 441static struct fb_ops au1100fb_ops = 442{ 443 .owner = THIS_MODULE, 444 .fb_setcolreg = au1100fb_fb_setcolreg, 445 .fb_blank = au1100fb_fb_blank, 446 .fb_pan_display = au1100fb_fb_pan_display, 447 .fb_fillrect = cfb_fillrect, 448 .fb_copyarea = cfb_copyarea, 449 .fb_imageblit = cfb_imageblit, 450 .fb_rotate = au1100fb_fb_rotate, 451 .fb_mmap = au1100fb_fb_mmap, 452 .fb_cursor = au1100fb_fb_cursor, 453}; 454 455 456/*-------------------------------------------------------------------------*/ 457 458/* AU1100 LCD controller device driver */ 459 460int au1100fb_drv_probe(struct device *dev) 461{ 462 struct au1100fb_device *fbdev = NULL; 463 struct resource *regs_res; 464 unsigned long page; 465 u32 sys_clksrc; 466 467 if (!dev) 468 return -EINVAL; 469 470 /* Allocate new device private */ 471 if (!(fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) { 472 print_err("fail to allocate device private record"); 473 return -ENOMEM; 474 } 475 476 fbdev->panel = &known_lcd_panels[drv_info.panel_idx]; 477 478 dev_set_drvdata(dev, (void*)fbdev); 479 480 /* Allocate region for our registers and map them */ 481 if (!(regs_res = platform_get_resource(to_platform_device(dev), 482 IORESOURCE_MEM, 0))) { 483 print_err("fail to retrieve registers resource"); 484 return -EFAULT; 485 } 486 487 au1100fb_fix.mmio_start = regs_res->start; 488 au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1; 489 490 if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len, 491 DRIVER_NAME)) { 492 print_err("fail to lock memory region at 0x%08lx", 493 au1100fb_fix.mmio_start); 494 return -EBUSY; 495 } 496 497 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start); 498 499 print_dbg("Register memory map at %p", fbdev->regs); 500 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len); 501 502 503 504 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */ 505 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres * 506 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS; 507 508 fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len), 509 &fbdev->fb_phys, GFP_KERNEL); 510 if (!fbdev->fb_mem) { 511 print_err("fail to allocate frambuffer (size: %dK))", 512 fbdev->fb_len / 1024); 513 return -ENOMEM; 514 } 515 516 au1100fb_fix.smem_start = fbdev->fb_phys; 517 au1100fb_fix.smem_len = fbdev->fb_len; 518 519 /* 520 * Set page reserved so that mmap will work. This is necessary 521 * since we'll be remapping normal memory. 522 */ 523 for (page = (unsigned long)fbdev->fb_mem; 524 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len); 525 page += PAGE_SIZE) { 526#if CONFIG_DMA_NONCOHERENT 527 SetPageReserved(virt_to_page(CAC_ADDR(page))); 528#else 529 SetPageReserved(virt_to_page(page)); 530#endif 531 } 532 533 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem); 534 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024); 535 536 /* Setup LCD clock to AUX (48 MHz) */ 537 sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL); 538 au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC); 539 540 /* load the panel info into the var struct */ 541 au1100fb_var.bits_per_pixel = fbdev->panel->bpp; 542 au1100fb_var.xres = fbdev->panel->xres; 543 au1100fb_var.xres_virtual = au1100fb_var.xres; 544 au1100fb_var.yres = fbdev->panel->yres; 545 au1100fb_var.yres_virtual = au1100fb_var.yres; 546 547 fbdev->info.screen_base = fbdev->fb_mem; 548 fbdev->info.fbops = &au1100fb_ops; 549 fbdev->info.fix = au1100fb_fix; 550 551 if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) { 552 return -ENOMEM; 553 } 554 555 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) { 556 print_err("Fail to allocate colormap (%d entries)", 557 AU1100_LCD_NBR_PALETTE_ENTRIES); 558 kfree(fbdev->info.pseudo_palette); 559 return -EFAULT; 560 } 561 562 fbdev->info.var = au1100fb_var; 563 564 /* Set h/w registers */ 565 au1100fb_setmode(fbdev); 566 567 /* Register new framebuffer */ 568 if (register_framebuffer(&fbdev->info) < 0) { 569 print_err("cannot register new framebuffer"); 570 goto failed; 571 } 572 573 return 0; 574 575failed: 576 if (fbdev->regs) { 577 release_mem_region(fbdev->regs_phys, fbdev->regs_len); 578 } 579 if (fbdev->fb_mem) { 580 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys); 581 } 582 if (fbdev->info.cmap.len != 0) { 583 fb_dealloc_cmap(&fbdev->info.cmap); 584 } 585 kfree(fbdev); 586 dev_set_drvdata(dev, NULL); 587 588 return 0; 589} 590 591int au1100fb_drv_remove(struct device *dev) 592{ 593 struct au1100fb_device *fbdev = NULL; 594 595 if (!dev) 596 return -ENODEV; 597 598 fbdev = (struct au1100fb_device*) dev_get_drvdata(dev); 599 600#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) 601 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); 602#endif 603 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 604 605 /* Clean up all probe data */ 606 unregister_framebuffer(&fbdev->info); 607 608 release_mem_region(fbdev->regs_phys, fbdev->regs_len); 609 610 dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys); 611 612 fb_dealloc_cmap(&fbdev->info.cmap); 613 kfree(fbdev->info.pseudo_palette); 614 kfree((void*)fbdev); 615 616 return 0; 617} 618 619#ifdef CONFIG_PM 620static u32 sys_clksrc; 621static struct au1100fb_regs fbregs; 622 623int au1100fb_drv_suspend(struct device *dev, pm_message_t state) 624{ 625 struct au1100fb_device *fbdev = dev_get_drvdata(dev); 626 627 if (!fbdev) 628 return 0; 629 630 /* Save the clock source state */ 631 sys_clksrc = au_readl(SYS_CLKSRC); 632 633 /* Blank the LCD */ 634 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); 635 636 /* Stop LCD clocking */ 637 au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC); 638 639 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); 640 641 return 0; 642} 643 644int au1100fb_drv_resume(struct device *dev) 645{ 646 struct au1100fb_device *fbdev = dev_get_drvdata(dev); 647 648 if (!fbdev) 649 return 0; 650 651 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs)); 652 653 /* Restart LCD clocking */ 654 au_writel(sys_clksrc, SYS_CLKSRC); 655 656 /* Unblank the LCD */ 657 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info); 658 659 return 0; 660} 661#else 662#define au1100fb_drv_suspend NULL 663#define au1100fb_drv_resume NULL 664#endif 665 666static struct device_driver au1100fb_driver = { 667 .name = "au1100-lcd", 668 .bus = &platform_bus_type, 669 670 .probe = au1100fb_drv_probe, 671 .remove = au1100fb_drv_remove, 672 .suspend = au1100fb_drv_suspend, 673 .resume = au1100fb_drv_resume, 674}; 675 676/*-------------------------------------------------------------------------*/ 677 678/* Kernel driver */ 679 680int au1100fb_setup(char *options) 681{ 682 char* this_opt; 683 int num_panels = ARRAY_SIZE(known_lcd_panels); 684 char* mode = NULL; 685 int panel_idx = 0; 686 687 if (num_panels <= 0) { 688 print_err("No LCD panels supported by driver!"); 689 return -EFAULT; 690 } 691 692 if (options) { 693 while ((this_opt = strsep(&options,",")) != NULL) { 694 /* Panel option */ 695 if (!strncmp(this_opt, "panel:", 6)) { 696 int i; 697 this_opt += 6; 698 for (i = 0; i < num_panels; i++) { 699 if (!strncmp(this_opt, 700 known_lcd_panels[i].name, 701 strlen(this_opt))) { 702 panel_idx = i; 703 break; 704 } 705 } 706 if (i >= num_panels) { 707 print_warn("Panel %s not supported!", this_opt); 708 } 709 } 710 if (!strncmp(this_opt, "nocursor", 8)) { 711 this_opt += 8; 712 nocursor = 1; 713 print_info("Cursor disabled"); 714 } 715 /* Mode option (only option that start with digit) */ 716 else if (isdigit(this_opt[0])) { 717 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL); 718 strncpy(mode, this_opt, strlen(this_opt) + 1); 719 } 720 /* Unsupported option */ 721 else { 722 print_warn("Unsupported option \"%s\"", this_opt); 723 } 724 } 725 } 726 727 drv_info.panel_idx = panel_idx; 728 drv_info.opt_mode = mode; 729 730 print_info("Panel=%s Mode=%s", 731 known_lcd_panels[drv_info.panel_idx].name, 732 drv_info.opt_mode ? drv_info.opt_mode : "default"); 733 734 return 0; 735} 736 737int __init au1100fb_init(void) 738{ 739 char* options; 740 int ret; 741 742 print_info("" DRIVER_DESC ""); 743 744 memset(&drv_info, 0, sizeof(drv_info)); 745 746 if (fb_get_options(DRIVER_NAME, &options)) 747 return -ENODEV; 748 749 /* Setup driver with options */ 750 ret = au1100fb_setup(options); 751 if (ret < 0) { 752 print_err("Fail to setup driver"); 753 return ret; 754 } 755 756 return driver_register(&au1100fb_driver); 757} 758 759void __exit au1100fb_cleanup(void) 760{ 761 driver_unregister(&au1100fb_driver); 762 763 kfree(drv_info.opt_mode); 764} 765 766module_init(au1100fb_init); 767module_exit(au1100fb_cleanup); 768 769MODULE_DESCRIPTION(DRIVER_DESC); 770MODULE_LICENSE("GPL"); 771