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  * Copyright 2002 MontaVista Software
  11  * Author: MontaVista Software, Inc.
  12  *              ppopov@mvista.com or source@mvista.com
  13  *
  14  * Copyright 2002 Alchemy Semiconductor
  15  * Author: Alchemy Semiconductor
  16  *
  17  * Based on:
  18  * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
  19  *  Created 28 Dec 1997 by Geert Uytterhoeven
  20  *
  21  *  This program is free software; you can redistribute  it and/or modify it
  22  *  under  the terms of  the GNU General  Public License as published by the
  23  *  Free Software Foundation;  either version 2 of the  License, or (at your
  24  *  option) any later version.
  25  *
  26  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  27  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  28  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  29  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  30  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  31  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  32  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  33  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  34  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  35  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  *  You should have received a copy of the  GNU General Public License along
  38  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  39  *  675 Mass Ave, Cambridge, MA 02139, USA.
  40  */
  41 #include <linux/config.h>
  42 #include <linux/module.h>
  43 #include <linux/kernel.h>
  44 #include <linux/errno.h>
  45 #include <linux/string.h>
  46 #include <linux/mm.h>
  47 #include <linux/fb.h>
  48 #include <linux/init.h>
  49 #include <linux/interrupt.h>
  50 #include <linux/ctype.h>
  51 #include <linux/dma-mapping.h>
  52 #include <linux/platform_device.h>
  53
  54 #include <asm/mach-au1x00/au1000.h>
  55
  56 #define DEBUG 0
  57
  58 #include "au1100fb.h"
  59
  60 /*
  61  * Sanity check. If this is a new Au1100 based board, search for
  62  * the PB1100 ifdefs to make sure you modify the code accordingly.
  63  */
  64 #if defined(CONFIG_MIPS_PB1100)
  65   #include <asm/mach-pb1x00/pb1100.h>
  66 #elif defined(CONFIG_MIPS_DB1100)
  67   #include <asm/mach-db1x00/db1x00.h>
  68 #else
  69   #error "Unknown Au1100 board, Au1100 FB driver not supported"
  70 #endif
  71
  72 #define DRIVER_NAME "au1100fb"
  73 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
  74
  75 #define to_au1100fb_device(_info) \
  76           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
  77
  78 /* Bitfields format supported by the controller. Note that the order of formats
  79  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
  80  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
  81  */
  82 struct fb_bitfield rgb_bitfields[][4] =
  83 {
  84         /*     Red,        Green,        Blue,       Transp   */
  85         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  86         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  87         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
  88         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
  89         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
  90
  91         /* The last is used to describe 12bpp format */
  92         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
  93 };
  94
  95 static struct fb_fix_screeninfo au1100fb_fix __initdata = {
  96         .id             = "AU1100 FB",
  97         .xpanstep       = 1,
  98         .ypanstep       = 1,
  99         .type           = FB_TYPE_PACKED_PIXELS,
 100         .accel          = FB_ACCEL_NONE,
 101 };
 102
 103 static struct fb_var_screeninfo au1100fb_var __initdata = {
 104         .activate       = FB_ACTIVATE_NOW,
 105         .height         = -1,
 106         .width          = -1,
 107         .vmode          = FB_VMODE_NONINTERLACED,
 108 };
 109
 110 static struct au1100fb_drv_info drv_info;
 111
 112 /*
 113  * Set hardware with var settings. This will enable the controller with a specific
 114  * mode, normally validated with the fb_check_var method
 115          */
 116 int au1100fb_setmode(struct au1100fb_device *fbdev)
 117 {
 118         struct fb_info *info = &fbdev->info;
 119         u32 words;
 120         int index;
 121
 122         if (!fbdev)
 123                 return -EINVAL;
 124
 125         /* Update var-dependent FB info */
 126         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 127                 if (info->var.bits_per_pixel <= 8) {
 128                         /* palettized */
 129                         info->var.red.offset    = 0;
 130                         info->var.red.length    = info->var.bits_per_pixel;
 131                         info->var.red.msb_right = 0;
 132
 133                         info->var.green.offset  = 0;
 134                         info->var.green.length  = info->var.bits_per_pixel;
 135                         info->var.green.msb_right = 0;
 136
 137                         info->var.blue.offset   = 0;
 138                         info->var.blue.length   = info->var.bits_per_pixel;
 139                         info->var.blue.msb_right = 0;
 140
 141                         info->var.transp.offset = 0;
 142                         info->var.transp.length = 0;
 143                         info->var.transp.msb_right = 0;
 144
 145                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 146                         info->fix.line_length = info->var.xres_virtual /
 147                                                         (8/info->var.bits_per_pixel);
 148                 } else {
 149                         /* non-palettized */
 150                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 151                         info->var.red = rgb_bitfields[index][0];
 152                         info->var.green = rgb_bitfields[index][1];
 153                         info->var.blue = rgb_bitfields[index][2];
 154                         info->var.transp = rgb_bitfields[index][3];
 155
 156                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 157                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 158         }
 159         } else {
 160                 /* mono */
 161                 info->fix.visual = FB_VISUAL_MONO10;
 162                 info->fix.line_length = info->var.xres_virtual / 8;
 163         }
 164
 165         info->screen_size = info->fix.line_length * info->var.yres_virtual;
 166
 167         /* Determine BPP mode and format */
 168         fbdev->regs->lcd_control = fbdev->panel->control_base |
 169                             ((info->var.rotate/90) << LCD_CONTROL_SM_BIT);
 170
 171         fbdev->regs->lcd_intenable = 0;
 172         fbdev->regs->lcd_intstatus = 0;
 173
 174         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 175
 176         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 177
 178         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 179
 180         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 181
 182         if (panel_is_dual(fbdev->panel)) {
 183                 /* Second panel display seconf half of screen if possible,
 184                  * otherwise display the same as the first panel */
 185                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
 186                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 187                                                           (info->fix.line_length *
 188                                                           (info->var.yres_virtual >> 1)));
 189                 } else {
 190                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 191                 }
 192         }
 193
 194         words = info->fix.line_length / sizeof(u32);
 195         if (!info->var.rotate || (info->var.rotate == 180)) {
 196                 words *= info->var.yres_virtual;
 197                 if (info->var.rotate /* 180 */) {
 198                         words -= (words % 8); /* should be divisable by 8 */
 199                 }
 200         }
 201         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 202
 203         fbdev->regs->lcd_pwmdiv = 0;
 204         fbdev->regs->lcd_pwmhi = 0;
 205
 206         /* Resume controller */
 207         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 208
 209         return 0;
 210 }
 211
 212 /* fb_setcolreg
 213  * Set color in LCD palette.
 214  */
 215 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 216 {
 217         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 218         u32 *palette = fbdev->regs->lcd_pallettebase;
 219         u32 value;
 220
 221         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 222                 return -EINVAL;
 223
 224         if (fbi->var.grayscale) {
 225                 /* Convert color to grayscale */
 226                 red = green = blue =
 227                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 228         }
 229
 230         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 231                 /* Place color in the pseudopalette */
 232                 if (regno > 16)
 233                         return -EINVAL;
 234
 235                 palette = (u32*)fbi->pseudo_palette;
 236
 237                 red   >>= (16 - fbi->var.red.length);
 238                 green >>= (16 - fbi->var.green.length);
 239                 blue  >>= (16 - fbi->var.blue.length);
 240
 241                 value = (red   << fbi->var.red.offset)  |
 242                         (green << fbi->var.green.offset)|
 243                         (blue  << fbi->var.blue.offset);
 244                 value &= 0xFFFF;
 245
 246         } else if (panel_is_active(fbdev->panel)) {
 247                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 248                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 249                 value &= 0xFFFF;
 250
 251         } else if (panel_is_color(fbdev->panel)) {
 252                 /* COLOR STN MODE */
 253                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 254                         ((green >> 8) & 0x00F0) |
 255                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 256                 value &= 0xFFF;
 257         } else {
 258                 /* MONOCHROME MODE */
 259                 value = (green >> 12) & 0x000F;
 260                 value &= 0xF;
 261         }
 262
 263         palette[regno] = value;
 264
 265         return 0;
 266 }
 267
 268 /* fb_blank
 269  * Blank the screen. Depending on the mode, the screen will be
 270  * activated with the backlight color, or desactivated
 271  */
 272 int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 273 {
 274         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 275
 276         print_dbg("fb_blank %d %p", blank_mode, fbi);
 277
 278         switch (blank_mode) {
 279
 280         case VESA_NO_BLANKING:
 281                         /* Turn on panel */
 282                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 283 #ifdef CONFIG_MIPS_PB1100
 284                         if (drv_info.panel_idx == 1) {
 285                                 au_writew(au_readw(PB1100_G_CONTROL)
 286                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 287                         PB1100_G_CONTROL);
 288                         }
 289 #endif
 290                 au_sync();
 291                 break;
 292
 293         case VESA_VSYNC_SUSPEND:
 294         case VESA_HSYNC_SUSPEND:
 295         case VESA_POWERDOWN:
 296                         /* Turn off panel */
 297                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 298 #ifdef CONFIG_MIPS_PB1100
 299                         if (drv_info.panel_idx == 1) {
 300                                 au_writew(au_readw(PB1100_G_CONTROL)
 301                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 302                         PB1100_G_CONTROL);
 303                         }
 304 #endif
 305                 au_sync();
 306                 break;
 307         default:
 308                 break;
 309
 310         }
 311         return 0;
 312 }
 313
 314 /* fb_pan_display
 315  * Pan display in x and/or y as specified
 316  */
 317 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 318 {
 319         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 320         int dy;
 321
 322         print_dbg("fb_pan_display %p %p", var, fbi);
 323
 324         if (!var || !fbdev) {
 325                 return -EINVAL;
 326         }
 327
 328         if (var->xoffset - fbi->var.xoffset) {
 329                 /* No support for X panning for now! */
 330                 return -EINVAL;
 331         }
 332
 333         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 334         dy = var->yoffset - fbi->var.yoffset;
 335         if (dy) {
 336
 337                 u32 dmaaddr;
 338
 339                 print_dbg("Panning screen of %d lines", dy);
 340
 341                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 342                 dmaaddr += (fbi->fix.line_length * dy);
 343
 344                 /* TODO: Wait for current frame to finished */
 345                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 346
 347                 if (panel_is_dual(fbdev->panel)) {
 348                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 349                         dmaaddr += (fbi->fix.line_length * dy);
 350                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 351         }
 352         }
 353         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 354
 355         return 0;
 356 }
 357
 358 /* fb_rotate
 359  * Rotate the display of this angle. This doesn't seems to be used by the core,
 360  * but as our hardware supports it, so why not implementing it...
 361  */
 362 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 363 {
 364         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 365
 366         print_dbg("fb_rotate %p %d", fbi, angle);
 367
 368         if (fbdev && (angle > 0) && !(angle % 90)) {
 369
 370                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 371
 372                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 373                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 374
 375                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 376         }
 377 }
 378
 379 /* fb_mmap
 380  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 381  * to allow the use of the TLB streaming flag (CCA=6)
 382  */
 383 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 384 {
 385         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 386         unsigned int len;
 387         unsigned long start=0, off;
 388
 389         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 390                 return -EINVAL;
 391         }
 392
 393         start = fbdev->fb_phys & PAGE_MASK;
 394         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 395
 396         off = vma->vm_pgoff << PAGE_SHIFT;
 397
 398         if ((vma->vm_end - vma->vm_start + off) > len) {
 399                 return -EINVAL;
 400         }
 401
 402         off += start;
 403         vma->vm_pgoff = off >> PAGE_SHIFT;
 404
 405         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 406         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 407
 408         vma->vm_flags |= VM_IO;
 409
 410         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 411                                 vma->vm_end - vma->vm_start,
 412                                 vma->vm_page_prot)) {
 413                 return -EAGAIN;
 414         }
 415
 416         return 0;
 417 }
 418
 419 static struct fb_ops au1100fb_ops =
 420 {
 421         .owner                  = THIS_MODULE,
 422         .fb_setcolreg           = au1100fb_fb_setcolreg,
 423         .fb_blank               = au1100fb_fb_blank,
 424         .fb_pan_display         = au1100fb_fb_pan_display,
 425         .fb_fillrect            = cfb_fillrect,
 426         .fb_copyarea            = cfb_copyarea,
 427         .fb_imageblit           = cfb_imageblit,
 428         .fb_rotate              = au1100fb_fb_rotate,
 429         .fb_mmap                = au1100fb_fb_mmap,
 430 };
 431
 432
 433 /*-------------------------------------------------------------------------*/
 434
 435 /* AU1100 LCD controller device driver */
 436
 437 int au1100fb_drv_probe(struct device *dev)
 438 {
 439         struct au1100fb_device *fbdev = NULL;
 440         struct resource *regs_res;
 441         unsigned long page;
 442         u32 sys_clksrc;
 443
 444         if (!dev)
 445                         return -EINVAL;
 446
 447         /* Allocate new device private */
 448         if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
 449                 print_err("fail to allocate device private record");
 450                 return -ENOMEM;
 451         }
 452         memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
 453
 454         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
 455
 456         dev_set_drvdata(dev, (void*)fbdev);
 457
 458         /* Allocate region for our registers and map them */
 459         if (!(regs_res = platform_get_resource(to_platform_device(dev),
 460                                         IORESOURCE_MEM, 0))) {
 461                 print_err("fail to retrieve registers resource");
 462                 return -EFAULT;
 463         }
 464
 465         au1100fb_fix.mmio_start = regs_res->start;
 466         au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
 467
 468         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
 469                                 DRIVER_NAME)) {
 470                 print_err("fail to lock memory region at 0x%08x",
 471                                 au1100fb_fix.mmio_start);
 472                 return -EBUSY;
 473         }
 474
 475         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 476
 477         print_dbg("Register memory map at %p", fbdev->regs);
 478         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 479
 480
 481
 482         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 483         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 484                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 485
 486         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
 487                                         &fbdev->fb_phys, GFP_KERNEL);
 488         if (!fbdev->fb_mem) {
 489                 print_err("fail to allocate frambuffer (size: %dK))",
 490                           fbdev->fb_len / 1024);
 491                 return -ENOMEM;
 492         }
 493
 494         au1100fb_fix.smem_start = fbdev->fb_phys;
 495         au1100fb_fix.smem_len = fbdev->fb_len;
 496
 497         /*
 498          * Set page reserved so that mmap will work. This is necessary
 499          * since we'll be remapping normal memory.
 500          */
 501         for (page = (unsigned long)fbdev->fb_mem;
 502              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 503              page += PAGE_SIZE) {
 504 #if CONFIG_DMA_NONCOHERENT
 505                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
 506 #else
 507                 SetPageReserved(virt_to_page(page));
 508 #endif
 509         }
 510
 511         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 512         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 513
 514         /* Setup LCD clock to AUX (48 MHz) */
 515         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 516         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 517
 518         /* load the panel info into the var struct */
 519         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 520         au1100fb_var.xres = fbdev->panel->xres;
 521         au1100fb_var.xres_virtual = au1100fb_var.xres;
 522         au1100fb_var.yres = fbdev->panel->yres;
 523         au1100fb_var.yres_virtual = au1100fb_var.yres;
 524
 525         fbdev->info.screen_base = fbdev->fb_mem;
 526         fbdev->info.fbops = &au1100fb_ops;
 527         fbdev->info.fix = au1100fb_fix;
 528
 529         if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
 530                 return -ENOMEM;
 531         }
 532         memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
 533
 534         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 535                 print_err("Fail to allocate colormap (%d entries)",
 536                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 537                 kfree(fbdev->info.pseudo_palette);
 538                 return -EFAULT;
 539         }
 540
 541         fbdev->info.var = au1100fb_var;
 542
 543         /* Set h/w registers */
 544         au1100fb_setmode(fbdev);
 545
 546         /* Register new framebuffer */
 547         if (register_framebuffer(&fbdev->info) < 0) {
 548                 print_err("cannot register new framebuffer");
 549                 goto failed;
 550         }
 551
 552         return 0;
 553
 554 failed:
 555         if (fbdev->regs) {
 556                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 557         }
 558         if (fbdev->fb_mem) {
 559                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
 560         }
 561         if (fbdev->info.cmap.len != 0) {
 562                 fb_dealloc_cmap(&fbdev->info.cmap);
 563         }
 564         kfree(fbdev);
 565         dev_set_drvdata(dev, NULL);
 566
 567         return 0;
 568 }
 569
 570 int au1100fb_drv_remove(struct device *dev)
 571 {
 572         struct au1100fb_device *fbdev = NULL;
 573
 574         if (!dev)
 575                 return -ENODEV;
 576
 577         fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
 578
 579 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 580         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 581 #endif
 582         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 583
 584         /* Clean up all probe data */
 585         unregister_framebuffer(&fbdev->info);
 586
 587         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 588
 589         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
 590
 591         fb_dealloc_cmap(&fbdev->info.cmap);
 592         kfree(fbdev->info.pseudo_palette);
 593         kfree((void*)fbdev);
 594
 595         return 0;
 596 }
 597
 598 int au1100fb_drv_suspend(struct device *dev, u32 state, u32 level)
 599 {
 600         /* TODO */
 601         return 0;
 602 }
 603
 604 int au1100fb_drv_resume(struct device *dev, u32 level)
 605 {
 606         /* TODO */
 607         return 0;
 608 }
 609
 610 static struct device_driver au1100fb_driver = {
 611         .name           = "au1100-lcd",
 612         .bus            = &platform_bus_type,
 613
 614         .probe          = au1100fb_drv_probe,
 615         .remove         = au1100fb_drv_remove,
 616         .suspend        = au1100fb_drv_suspend,
 617         .resume         = au1100fb_drv_resume,
 618 };
 619
 620 /*-------------------------------------------------------------------------*/
 621
 622 /* Kernel driver */
 623
 624 int au1100fb_setup(char *options)
 625 {
 626         char* this_opt;
 627         int num_panels = ARRAY_SIZE(known_lcd_panels);
 628         char* mode = NULL;
 629         int panel_idx = 0;
 630
 631         if (num_panels <= 0) {
 632                 print_err("No LCD panels supported by driver!");
 633                 return -EFAULT;
 634                         }
 635
 636         if (options) {
 637                 while ((this_opt = strsep(&options,",")) != NULL) {
 638                         /* Panel option */
 639                 if (!strncmp(this_opt, "panel:", 6)) {
 640                                 int i;
 641                                 this_opt += 6;
 642                                 for (i = 0; i < num_panels; i++) {
 643                                         if (!strncmp(this_opt,
 644                                                      known_lcd_panels[i].name,
 645                                                         strlen(this_opt))) {
 646                                                 panel_idx = i;
 647                                         break;
 648                                 }
 649                         }
 650                                 if (i >= num_panels) {
 651                                         print_warn("Panel %s not supported!", this_opt);
 652                                 }
 653                         }
 654                         /* Mode option (only option that start with digit) */
 655                         else if (isdigit(this_opt[0])) {
 656                                 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
 657                                 strncpy(mode, this_opt, strlen(this_opt) + 1);
 658                         }
 659                         /* Unsupported option */
 660                         else {
 661                                 print_warn("Unsupported option \"%s\"", this_opt);
 662                 }
 663                 }
 664         }
 665
 666         drv_info.panel_idx = panel_idx;
 667         drv_info.opt_mode = mode;
 668
 669         print_info("Panel=%s Mode=%s",
 670                         known_lcd_panels[drv_info.panel_idx].name,
 671                         drv_info.opt_mode ? drv_info.opt_mode : "default");
 672
 673         return 0;
 674 }
 675
 676 int __init au1100fb_init(void)
 677 {
 678         char* options;
 679         int ret;
 680
 681         print_info("" DRIVER_DESC "");
 682
 683         memset(&drv_info, 0, sizeof(drv_info));
 684
 685         if (fb_get_options(DRIVER_NAME, &options))
 686                 return -ENODEV;
 687
 688         /* Setup driver with options */
 689         ret = au1100fb_setup(options);
 690         if (ret < 0) {
 691                 print_err("Fail to setup driver");
 692                 return ret;
 693         }
 694
 695         return driver_register(&au1100fb_driver);
 696 }
 697
 698 void __exit au1100fb_cleanup(void)
 699 {
 700         driver_unregister(&au1100fb_driver);
 701
 702         if (drv_info.opt_mode)
 703                 kfree(drv_info.opt_mode);
 704 }
 705
 706 module_init(au1100fb_init);
 707 module_exit(au1100fb_cleanup);
 708
 709 MODULE_DESCRIPTION(DRIVER_DESC);
 710 MODULE_LICENSE("GPL");