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