drivers/video/au1100fb.c

   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  *
  12  * Copyright 2002 MontaVista Software
  13  * Author: MontaVista Software, Inc.
  14  *              ppopov@mvista.com or source@mvista.com
  15  *
  16  * Copyright 2002 Alchemy Semiconductor
  17  * Author: Alchemy Semiconductor
  18  *
  19  * Based on:
  20  * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
  21  *  Created 28 Dec 1997 by Geert Uytterhoeven
  22  *
  23  *  This program is free software; you can redistribute  it and/or modify it
  24  *  under  the terms of  the GNU General  Public License as published by the
  25  *  Free Software Foundation;  either version 2 of the  License, or (at your
  26  *  option) any later version.
  27  *
  28  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  29  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  30  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  31  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  32  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  33  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  34  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  35  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  36  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  37  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38  *
  39  *  You should have received a copy of the  GNU General Public License along
  40  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  41  *  675 Mass Ave, Cambridge, MA 02139, USA.
  42  */
  43 #include <linux/config.h>
  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  */
  84 struct 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
  97 static 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
 105 static 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
 112 static struct au1100fb_drv_info drv_info;
 113
 114 /*
 115  * Set hardware with var settings. This will enable the controller with a specific
 116  * mode, normally validated with the fb_check_var method
 117          */
 118 int au1100fb_setmode(struct au1100fb_device *fbdev)
 119 {
 120         struct fb_info *info = &fbdev->info;
 121         u32 words;
 122         int index;
 123
 124         if (!fbdev)
 125                 return -EINVAL;
 126
 127         /* Update var-dependent FB info */
 128         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 129                 if (info->var.bits_per_pixel <= 8) {
 130                         /* palettized */
 131                         info->var.red.offset    = 0;
 132                         info->var.red.length    = info->var.bits_per_pixel;
 133                         info->var.red.msb_right = 0;
 134
 135                         info->var.green.offset  = 0;
 136                         info->var.green.length  = info->var.bits_per_pixel;
 137                         info->var.green.msb_right = 0;
 138
 139                         info->var.blue.offset   = 0;
 140                         info->var.blue.length   = info->var.bits_per_pixel;
 141                         info->var.blue.msb_right = 0;
 142
 143                         info->var.transp.offset = 0;
 144                         info->var.transp.length = 0;
 145                         info->var.transp.msb_right = 0;
 146
 147                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 148                         info->fix.line_length = info->var.xres_virtual /
 149                                                         (8/info->var.bits_per_pixel);
 150                 } else {
 151                         /* non-palettized */
 152                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 153                         info->var.red = rgb_bitfields[index][0];
 154                         info->var.green = rgb_bitfields[index][1];
 155                         info->var.blue = rgb_bitfields[index][2];
 156                         info->var.transp = rgb_bitfields[index][3];
 157
 158                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 159                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 160         }
 161         } else {
 162                 /* mono */
 163                 info->fix.visual = FB_VISUAL_MONO10;
 164                 info->fix.line_length = info->var.xres_virtual / 8;
 165         }
 166
 167         info->screen_size = info->fix.line_length * info->var.yres_virtual;
 168
 169         /* Determine BPP mode and format */
 170         fbdev->regs->lcd_control = fbdev->panel->control_base |
 171                             ((info->var.rotate/90) << LCD_CONTROL_SM_BIT);
 172
 173         fbdev->regs->lcd_intenable = 0;
 174         fbdev->regs->lcd_intstatus = 0;
 175
 176         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 177
 178         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 179
 180         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 181
 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
 211         return 0;
 212 }
 213
 214 /* fb_setcolreg
 215  * Set color in LCD palette.
 216  */
 217 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 218 {
 219         struct au1100fb_device *fbdev;
 220         u32 *palette;
 221         u32 value;
 222
 223         fbdev = to_au1100fb_device(fbi);
 224         palette = fbdev->regs->lcd_pallettebase;
 225
 226         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 227                 return -EINVAL;
 228
 229         if (fbi->var.grayscale) {
 230                 /* Convert color to grayscale */
 231                 red = green = blue =
 232                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 233         }
 234
 235         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 236                 /* Place color in the pseudopalette */
 237                 if (regno > 16)
 238                         return -EINVAL;
 239
 240                 palette = (u32*)fbi->pseudo_palette;
 241
 242                 red   >>= (16 - fbi->var.red.length);
 243                 green >>= (16 - fbi->var.green.length);
 244                 blue  >>= (16 - fbi->var.blue.length);
 245
 246                 value = (red   << fbi->var.red.offset)  |
 247                         (green << fbi->var.green.offset)|
 248                         (blue  << fbi->var.blue.offset);
 249                 value &= 0xFFFF;
 250
 251         } else if (panel_is_active(fbdev->panel)) {
 252                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 253                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 254                 value &= 0xFFFF;
 255
 256         } else if (panel_is_color(fbdev->panel)) {
 257                 /* COLOR STN MODE */
 258                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 259                         ((green >> 8) & 0x00F0) |
 260                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 261                 value &= 0xFFF;
 262         } else {
 263                 /* MONOCHROME MODE */
 264                 value = (green >> 12) & 0x000F;
 265                 value &= 0xF;
 266         }
 267
 268         palette[regno] = value;
 269
 270         return 0;
 271 }
 272
 273 /* fb_blank
 274  * Blank the screen. Depending on the mode, the screen will be
 275  * activated with the backlight color, or desactivated
 276  */
 277 int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 278 {
 279         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 280
 281         print_dbg("fb_blank %d %p", blank_mode, fbi);
 282
 283         switch (blank_mode) {
 284
 285         case VESA_NO_BLANKING:
 286                         /* Turn on panel */
 287                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 288 #ifdef CONFIG_MIPS_PB1100
 289                         if (drv_info.panel_idx == 1) {
 290                                 au_writew(au_readw(PB1100_G_CONTROL)
 291                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 292                         PB1100_G_CONTROL);
 293                         }
 294 #endif
 295                 au_sync();
 296                 break;
 297
 298         case VESA_VSYNC_SUSPEND:
 299         case VESA_HSYNC_SUSPEND:
 300         case VESA_POWERDOWN:
 301                         /* Turn off panel */
 302                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 303 #ifdef CONFIG_MIPS_PB1100
 304                         if (drv_info.panel_idx == 1) {
 305                                 au_writew(au_readw(PB1100_G_CONTROL)
 306                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 307                         PB1100_G_CONTROL);
 308                         }
 309 #endif
 310                 au_sync();
 311                 break;
 312         default:
 313                 break;
 314
 315         }
 316         return 0;
 317 }
 318
 319 /* fb_pan_display
 320  * Pan display in x and/or y as specified
 321  */
 322 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 323 {
 324         struct au1100fb_device *fbdev;
 325         int dy;
 326
 327         fbdev = to_au1100fb_device(fbi);
 328
 329         print_dbg("fb_pan_display %p %p", var, fbi);
 330
 331         if (!var || !fbdev) {
 332                 return -EINVAL;
 333         }
 334
 335         if (var->xoffset - fbi->var.xoffset) {
 336                 /* No support for X panning for now! */
 337                 return -EINVAL;
 338         }
 339
 340         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 341         dy = var->yoffset - fbi->var.yoffset;
 342         if (dy) {
 343
 344                 u32 dmaaddr;
 345
 346                 print_dbg("Panning screen of %d lines", dy);
 347
 348                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 349                 dmaaddr += (fbi->fix.line_length * dy);
 350
 351                 /* TODO: Wait for current frame to finished */
 352                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 353
 354                 if (panel_is_dual(fbdev->panel)) {
 355                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 356                         dmaaddr += (fbi->fix.line_length * dy);
 357                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 358         }
 359         }
 360         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 361
 362         return 0;
 363 }
 364
 365 /* fb_rotate
 366  * Rotate the display of this angle. This doesn't seems to be used by the core,
 367  * but as our hardware supports it, so why not implementing it...
 368  */
 369 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 370 {
 371         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 372
 373         print_dbg("fb_rotate %p %d", fbi, angle);
 374
 375         if (fbdev && (angle > 0) && !(angle % 90)) {
 376
 377                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 378
 379                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 380                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 381
 382                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 383         }
 384 }
 385
 386 /* fb_mmap
 387  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 388  * to allow the use of the TLB streaming flag (CCA=6)
 389  */
 390 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 391 {
 392         struct au1100fb_device *fbdev;
 393         unsigned int len;
 394         unsigned long start=0, off;
 395
 396         fbdev = to_au1100fb_device(fbi);
 397
 398         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 399                 return -EINVAL;
 400         }
 401
 402         start = fbdev->fb_phys & PAGE_MASK;
 403         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 404
 405         off = vma->vm_pgoff << PAGE_SHIFT;
 406
 407         if ((vma->vm_end - vma->vm_start + off) > len) {
 408                 return -EINVAL;
 409         }
 410
 411         off += start;
 412         vma->vm_pgoff = off >> PAGE_SHIFT;
 413
 414         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 415         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 416
 417         vma->vm_flags |= VM_IO;
 418
 419         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 420                                 vma->vm_end - vma->vm_start,
 421                                 vma->vm_page_prot)) {
 422                 return -EAGAIN;
 423         }
 424
 425         return 0;
 426 }
 427
 428 static struct fb_ops au1100fb_ops =
 429 {
 430         .owner                  = THIS_MODULE,
 431         .fb_setcolreg           = au1100fb_fb_setcolreg,
 432         .fb_blank               = au1100fb_fb_blank,
 433         .fb_pan_display         = au1100fb_fb_pan_display,
 434         .fb_fillrect            = cfb_fillrect,
 435         .fb_copyarea            = cfb_copyarea,
 436         .fb_imageblit           = cfb_imageblit,
 437         .fb_rotate              = au1100fb_fb_rotate,
 438         .fb_mmap                = au1100fb_fb_mmap,
 439 };
 440
 441
 442 /*-------------------------------------------------------------------------*/
 443
 444 /* AU1100 LCD controller device driver */
 445
 446 int au1100fb_drv_probe(struct device *dev)
 447 {
 448         struct au1100fb_device *fbdev = NULL;
 449         struct resource *regs_res;
 450         unsigned long page;
 451         u32 sys_clksrc;
 452
 453         if (!dev)
 454                         return -EINVAL;
 455
 456         /* Allocate new device private */
 457         if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
 458                 print_err("fail to allocate device private record");
 459                 return -ENOMEM;
 460         }
 461         memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
 462
 463         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
 464
 465         dev_set_drvdata(dev, (void*)fbdev);
 466
 467         /* Allocate region for our registers and map them */
 468         if (!(regs_res = platform_get_resource(to_platform_device(dev),
 469                                         IORESOURCE_MEM, 0))) {
 470                 print_err("fail to retrieve registers resource");
 471                 return -EFAULT;
 472         }
 473
 474         au1100fb_fix.mmio_start = regs_res->start;
 475         au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
 476
 477         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
 478                                 DRIVER_NAME)) {
 479                 print_err("fail to lock memory region at 0x%08lx",
 480                                 au1100fb_fix.mmio_start);
 481                 return -EBUSY;
 482         }
 483
 484         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 485
 486         print_dbg("Register memory map at %p", fbdev->regs);
 487         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 488
 489
 490
 491         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 492         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 493                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 494
 495         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
 496                                         &fbdev->fb_phys, GFP_KERNEL);
 497         if (!fbdev->fb_mem) {
 498                 print_err("fail to allocate frambuffer (size: %dK))",
 499                           fbdev->fb_len / 1024);
 500                 return -ENOMEM;
 501         }
 502
 503         au1100fb_fix.smem_start = fbdev->fb_phys;
 504         au1100fb_fix.smem_len = fbdev->fb_len;
 505
 506         /*
 507          * Set page reserved so that mmap will work. This is necessary
 508          * since we'll be remapping normal memory.
 509          */
 510         for (page = (unsigned long)fbdev->fb_mem;
 511              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 512              page += PAGE_SIZE) {
 513 #if CONFIG_DMA_NONCOHERENT
 514                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
 515 #else
 516                 SetPageReserved(virt_to_page(page));
 517 #endif
 518         }
 519
 520         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 521         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 522
 523         /* Setup LCD clock to AUX (48 MHz) */
 524         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 525         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 526
 527         /* load the panel info into the var struct */
 528         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 529         au1100fb_var.xres = fbdev->panel->xres;
 530         au1100fb_var.xres_virtual = au1100fb_var.xres;
 531         au1100fb_var.yres = fbdev->panel->yres;
 532         au1100fb_var.yres_virtual = au1100fb_var.yres;
 533
 534         fbdev->info.screen_base = fbdev->fb_mem;
 535         fbdev->info.fbops = &au1100fb_ops;
 536         fbdev->info.fix = au1100fb_fix;
 537
 538         if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
 539                 return -ENOMEM;
 540         }
 541         memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
 542
 543         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 544                 print_err("Fail to allocate colormap (%d entries)",
 545                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 546                 kfree(fbdev->info.pseudo_palette);
 547                 return -EFAULT;
 548         }
 549
 550         fbdev->info.var = au1100fb_var;
 551
 552         /* Set h/w registers */
 553         au1100fb_setmode(fbdev);
 554
 555         /* Register new framebuffer */
 556         if (register_framebuffer(&fbdev->info) < 0) {
 557                 print_err("cannot register new framebuffer");
 558                 goto failed;
 559         }
 560
 561         return 0;
 562
 563 failed:
 564         if (fbdev->regs) {
 565                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 566         }
 567         if (fbdev->fb_mem) {
 568                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
 569         }
 570         if (fbdev->info.cmap.len != 0) {
 571                 fb_dealloc_cmap(&fbdev->info.cmap);
 572         }
 573         kfree(fbdev);
 574         dev_set_drvdata(dev, NULL);
 575
 576         return 0;
 577 }
 578
 579 int au1100fb_drv_remove(struct device *dev)
 580 {
 581         struct au1100fb_device *fbdev = NULL;
 582
 583         if (!dev)
 584                 return -ENODEV;
 585
 586         fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
 587
 588 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 589         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 590 #endif
 591         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 592
 593         /* Clean up all probe data */
 594         unregister_framebuffer(&fbdev->info);
 595
 596         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 597
 598         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
 599
 600         fb_dealloc_cmap(&fbdev->info.cmap);
 601         kfree(fbdev->info.pseudo_palette);
 602         kfree((void*)fbdev);
 603
 604         return 0;
 605 }
 606
 607 #ifdef CONFIG_PM
 608 static u32 sys_clksrc;
 609 static struct au1100fb_regs fbregs;
 610
 611 int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
 612 {
 613         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
 614
 615         if (!fbdev)
 616                 return 0;
 617
 618         /* Save the clock source state */
 619         sys_clksrc = au_readl(SYS_CLKSRC);
 620
 621         /* Blank the LCD */
 622         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 623
 624         /* Stop LCD clocking */
 625         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 626
 627         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 628
 629         return 0;
 630 }
 631
 632 int au1100fb_drv_resume(struct device *dev)
 633 {
 634         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
 635
 636         if (!fbdev)
 637                 return 0;
 638
 639         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 640
 641         /* Restart LCD clocking */
 642         au_writel(sys_clksrc, SYS_CLKSRC);
 643
 644         /* Unblank the LCD */
 645         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 646
 647         return 0;
 648 }
 649 #else
 650 #define au1100fb_drv_suspend NULL
 651 #define au1100fb_drv_resume NULL
 652 #endif
 653
 654 static struct device_driver au1100fb_driver = {
 655         .name           = "au1100-lcd",
 656         .bus            = &platform_bus_type,
 657
 658         .probe          = au1100fb_drv_probe,
 659         .remove         = au1100fb_drv_remove,
 660         .suspend        = au1100fb_drv_suspend,
 661         .resume         = au1100fb_drv_resume,
 662 };
 663
 664 /*-------------------------------------------------------------------------*/
 665
 666 /* Kernel driver */
 667
 668 int au1100fb_setup(char *options)
 669 {
 670         char* this_opt;
 671         int num_panels = ARRAY_SIZE(known_lcd_panels);
 672         char* mode = NULL;
 673         int panel_idx = 0;
 674
 675         if (num_panels <= 0) {
 676                 print_err("No LCD panels supported by driver!");
 677                 return -EFAULT;
 678                         }
 679
 680         if (options) {
 681                 while ((this_opt = strsep(&options,",")) != NULL) {
 682                         /* Panel option */
 683                 if (!strncmp(this_opt, "panel:", 6)) {
 684                                 int i;
 685                                 this_opt += 6;
 686                                 for (i = 0; i < num_panels; i++) {
 687                                         if (!strncmp(this_opt,
 688                                                      known_lcd_panels[i].name,
 689                                                         strlen(this_opt))) {
 690                                                 panel_idx = i;
 691                                         break;
 692                                 }
 693                         }
 694                                 if (i >= num_panels) {
 695                                         print_warn("Panel %s not supported!", this_opt);
 696                                 }
 697                         }
 698                         /* Mode option (only option that start with digit) */
 699                         else if (isdigit(this_opt[0])) {
 700                                 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
 701                                 strncpy(mode, this_opt, strlen(this_opt) + 1);
 702                         }
 703                         /* Unsupported option */
 704                         else {
 705                                 print_warn("Unsupported option \"%s\"", this_opt);
 706                 }
 707                 }
 708         }
 709
 710         drv_info.panel_idx = panel_idx;
 711         drv_info.opt_mode = mode;
 712
 713         print_info("Panel=%s Mode=%s",
 714                         known_lcd_panels[drv_info.panel_idx].name,
 715                         drv_info.opt_mode ? drv_info.opt_mode : "default");
 716
 717         return 0;
 718 }
 719
 720 int __init au1100fb_init(void)
 721 {
 722         char* options;
 723         int ret;
 724
 725         print_info("" DRIVER_DESC "");
 726
 727         memset(&drv_info, 0, sizeof(drv_info));
 728
 729         if (fb_get_options(DRIVER_NAME, &options))
 730                 return -ENODEV;
 731
 732         /* Setup driver with options */
 733         ret = au1100fb_setup(options);
 734         if (ret < 0) {
 735                 print_err("Fail to setup driver");
 736                 return ret;
 737         }
 738
 739         return driver_register(&au1100fb_driver);
 740 }
 741
 742 void __exit au1100fb_cleanup(void)
 743 {
 744         driver_unregister(&au1100fb_driver);
 745
 746         kfree(drv_info.opt_mode);
 747 }
 748
 749 module_init(au1100fb_init);
 750 module_exit(au1100fb_cleanup);
 751
 752 MODULE_DESCRIPTION(DRIVER_DESC);
 753 MODULE_LICENSE("GPL");