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/module.h>
  44 #include <linux/kernel.h>
  45 #include <linux/errno.h>
  46 #include <linux/string.h>
  47 #include <linux/mm.h>
  48 #include <linux/fb.h>
  49 #include <linux/init.h>
  50 #include <linux/interrupt.h>
  51 #include <linux/ctype.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/platform_device.h>
  54
  55 #include <asm/mach-au1x00/au1000.h>
  56
  57 #define DEBUG 0
  58
  59 #include "au1100fb.h"
  60
  61 /*
  62  * Sanity check. If this is a new Au1100 based board, search for
  63  * the PB1100 ifdefs to make sure you modify the code accordingly.
  64  */
  65 #if defined(CONFIG_MIPS_PB1100)
  66   #include <asm/mach-pb1x00/pb1100.h>
  67 #elif defined(CONFIG_MIPS_DB1100)
  68   #include <asm/mach-db1x00/db1x00.h>
  69 #else
  70   #error "Unknown Au1100 board, Au1100 FB driver not supported"
  71 #endif
  72
  73 #define DRIVER_NAME "au1100fb"
  74 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
  75
  76 #define to_au1100fb_device(_info) \
  77           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
  78
  79 /* Bitfields format supported by the controller. Note that the order of formats
  80  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
  81  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
  82  */
  83 struct fb_bitfield rgb_bitfields[][4] =
  84 {
  85         /*     Red,        Green,        Blue,       Transp   */
  86         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  87         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  88         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
  89         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
  90         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
  91
  92         /* The last is used to describe 12bpp format */
  93         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
  94 };
  95
  96 static struct fb_fix_screeninfo au1100fb_fix __initdata = {
  97         .id             = "AU1100 FB",
  98         .xpanstep       = 1,
  99         .ypanstep       = 1,
 100         .type           = FB_TYPE_PACKED_PIXELS,
 101         .accel          = FB_ACCEL_NONE,
 102 };
 103
 104 static struct fb_var_screeninfo au1100fb_var __initdata = {
 105         .activate       = FB_ACTIVATE_NOW,
 106         .height         = -1,
 107         .width          = -1,
 108         .vmode          = FB_VMODE_NONINTERLACED,
 109 };
 110
 111 static struct au1100fb_drv_info drv_info;
 112
 113 /*
 114  * Set hardware with var settings. This will enable the controller with a specific
 115  * mode, normally validated with the fb_check_var method
 116          */
 117 int au1100fb_setmode(struct au1100fb_device *fbdev)
 118 {
 119         struct fb_info *info = &fbdev->info;
 120         u32 words;
 121         int index;
 122
 123         if (!fbdev)
 124                 return -EINVAL;
 125
 126         /* Update var-dependent FB info */
 127         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 128                 if (info->var.bits_per_pixel <= 8) {
 129                         /* palettized */
 130                         info->var.red.offset    = 0;
 131                         info->var.red.length    = info->var.bits_per_pixel;
 132                         info->var.red.msb_right = 0;
 133
 134                         info->var.green.offset  = 0;
 135                         info->var.green.length  = info->var.bits_per_pixel;
 136                         info->var.green.msb_right = 0;
 137
 138                         info->var.blue.offset   = 0;
 139                         info->var.blue.length   = info->var.bits_per_pixel;
 140                         info->var.blue.msb_right = 0;
 141
 142                         info->var.transp.offset = 0;
 143                         info->var.transp.length = 0;
 144                         info->var.transp.msb_right = 0;
 145
 146                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 147                         info->fix.line_length = info->var.xres_virtual /
 148                                                         (8/info->var.bits_per_pixel);
 149                 } else {
 150                         /* non-palettized */
 151                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 152                         info->var.red = rgb_bitfields[index][0];
 153                         info->var.green = rgb_bitfields[index][1];
 154                         info->var.blue = rgb_bitfields[index][2];
 155                         info->var.transp = rgb_bitfields[index][3];
 156
 157                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 158                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 159                 }
 160         } else {
 161                 /* mono */
 162                 info->fix.visual = FB_VISUAL_MONO10;
 163                 info->fix.line_length = info->var.xres_virtual / 8;
 164         }
 165
 166         info->screen_size = info->fix.line_length * info->var.yres_virtual;
 167         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
 168                                 >> LCD_CONTROL_SM_BIT) * 90;
 169
 170         /* Determine BPP mode and format */
 171         fbdev->regs->lcd_control = fbdev->panel->control_base;
 172         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 173         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 174         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 175         fbdev->regs->lcd_intenable = 0;
 176         fbdev->regs->lcd_intstatus = 0;
 177         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 178
 179         if (panel_is_dual(fbdev->panel)) {
 180                 /* Second panel display seconf half of screen if possible,
 181                  * otherwise display the same as the first panel */
 182                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
 183                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 184                                                           (info->fix.line_length *
 185                                                           (info->var.yres_virtual >> 1)));
 186                 } else {
 187                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 188                 }
 189         }
 190
 191         words = info->fix.line_length / sizeof(u32);
 192         if (!info->var.rotate || (info->var.rotate == 180)) {
 193                 words *= info->var.yres_virtual;
 194                 if (info->var.rotate /* 180 */) {
 195                         words -= (words % 8); /* should be divisable by 8 */
 196                 }
 197         }
 198         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 199
 200         fbdev->regs->lcd_pwmdiv = 0;
 201         fbdev->regs->lcd_pwmhi = 0;
 202
 203         /* Resume controller */
 204         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 205         mdelay(10);
 206         au1100fb_fb_blank(VESA_NO_BLANKING, info);
 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;
 217         u32 *palette;
 218         u32 value;
 219
 220         fbdev = to_au1100fb_device(fbi);
 221         palette = fbdev->regs->lcd_pallettebase;
 222
 223         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 224                 return -EINVAL;
 225
 226         if (fbi->var.grayscale) {
 227                 /* Convert color to grayscale */
 228                 red = green = blue =
 229                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 230         }
 231
 232         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 233                 /* Place color in the pseudopalette */
 234                 if (regno > 16)
 235                         return -EINVAL;
 236
 237                 palette = (u32*)fbi->pseudo_palette;
 238
 239                 red   >>= (16 - fbi->var.red.length);
 240                 green >>= (16 - fbi->var.green.length);
 241                 blue  >>= (16 - fbi->var.blue.length);
 242
 243                 value = (red   << fbi->var.red.offset)  |
 244                         (green << fbi->var.green.offset)|
 245                         (blue  << fbi->var.blue.offset);
 246                 value &= 0xFFFF;
 247
 248         } else if (panel_is_active(fbdev->panel)) {
 249                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 250                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 251                 value &= 0xFFFF;
 252
 253         } else if (panel_is_color(fbdev->panel)) {
 254                 /* COLOR STN MODE */
 255                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 256                         ((green >> 8) & 0x00F0) |
 257                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 258                 value &= 0xFFF;
 259         } else {
 260                 /* MONOCHROME MODE */
 261                 value = (green >> 12) & 0x000F;
 262                 value &= 0xF;
 263         }
 264
 265         palette[regno] = value;
 266
 267         return 0;
 268 }
 269
 270 /* fb_blank
 271  * Blank the screen. Depending on the mode, the screen will be
 272  * activated with the backlight color, or desactivated
 273  */
 274 int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 275 {
 276         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 277
 278         print_dbg("fb_blank %d %p", blank_mode, fbi);
 279
 280         switch (blank_mode) {
 281
 282         case VESA_NO_BLANKING:
 283                         /* Turn on panel */
 284                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 285 #ifdef CONFIG_MIPS_PB1100
 286                         if (drv_info.panel_idx == 1) {
 287                                 au_writew(au_readw(PB1100_G_CONTROL)
 288                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 289                         PB1100_G_CONTROL);
 290                         }
 291 #endif
 292                 au_sync();
 293                 break;
 294
 295         case VESA_VSYNC_SUSPEND:
 296         case VESA_HSYNC_SUSPEND:
 297         case VESA_POWERDOWN:
 298                         /* Turn off panel */
 299                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 300 #ifdef CONFIG_MIPS_PB1100
 301                         if (drv_info.panel_idx == 1) {
 302                                 au_writew(au_readw(PB1100_G_CONTROL)
 303                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 304                         PB1100_G_CONTROL);
 305                         }
 306 #endif
 307                 au_sync();
 308                 break;
 309         default:
 310                 break;
 311
 312         }
 313         return 0;
 314 }
 315
 316 /* fb_pan_display
 317  * Pan display in x and/or y as specified
 318  */
 319 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 320 {
 321         struct au1100fb_device *fbdev;
 322         int dy;
 323
 324         fbdev = to_au1100fb_device(fbi);
 325
 326         print_dbg("fb_pan_display %p %p", var, fbi);
 327
 328         if (!var || !fbdev) {
 329                 return -EINVAL;
 330         }
 331
 332         if (var->xoffset - fbi->var.xoffset) {
 333                 /* No support for X panning for now! */
 334                 return -EINVAL;
 335         }
 336
 337         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 338         dy = var->yoffset - fbi->var.yoffset;
 339         if (dy) {
 340
 341                 u32 dmaaddr;
 342
 343                 print_dbg("Panning screen of %d lines", dy);
 344
 345                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 346                 dmaaddr += (fbi->fix.line_length * dy);
 347
 348                 /* TODO: Wait for current frame to finished */
 349                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 350
 351                 if (panel_is_dual(fbdev->panel)) {
 352                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 353                         dmaaddr += (fbi->fix.line_length * dy);
 354                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 355         }
 356         }
 357         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 358
 359         return 0;
 360 }
 361
 362 /* fb_rotate
 363  * Rotate the display of this angle. This doesn't seems to be used by the core,
 364  * but as our hardware supports it, so why not implementing it...
 365  */
 366 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 367 {
 368         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 369
 370         print_dbg("fb_rotate %p %d", fbi, angle);
 371
 372         if (fbdev && (angle > 0) && !(angle % 90)) {
 373
 374                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 375
 376                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 377                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 378
 379                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 380         }
 381 }
 382
 383 /* fb_mmap
 384  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 385  * to allow the use of the TLB streaming flag (CCA=6)
 386  */
 387 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 388 {
 389         struct au1100fb_device *fbdev;
 390         unsigned int len;
 391         unsigned long start=0, off;
 392
 393         fbdev = to_au1100fb_device(fbi);
 394
 395         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 396                 return -EINVAL;
 397         }
 398
 399         start = fbdev->fb_phys & PAGE_MASK;
 400         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 401
 402         off = vma->vm_pgoff << PAGE_SHIFT;
 403
 404         if ((vma->vm_end - vma->vm_start + off) > len) {
 405                 return -EINVAL;
 406         }
 407
 408         off += start;
 409         vma->vm_pgoff = off >> PAGE_SHIFT;
 410
 411         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 412         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 413
 414         vma->vm_flags |= VM_IO;
 415
 416         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 417                                 vma->vm_end - vma->vm_start,
 418                                 vma->vm_page_prot)) {
 419                 return -EAGAIN;
 420         }
 421
 422         return 0;
 423 }
 424
 425 static struct fb_ops au1100fb_ops =
 426 {
 427         .owner                  = THIS_MODULE,
 428         .fb_setcolreg           = au1100fb_fb_setcolreg,
 429         .fb_blank               = au1100fb_fb_blank,
 430         .fb_pan_display         = au1100fb_fb_pan_display,
 431         .fb_fillrect            = cfb_fillrect,
 432         .fb_copyarea            = cfb_copyarea,
 433         .fb_imageblit           = cfb_imageblit,
 434         .fb_rotate              = au1100fb_fb_rotate,
 435         .fb_mmap                = au1100fb_fb_mmap,
 436 };
 437
 438
 439 /*-------------------------------------------------------------------------*/
 440
 441 /* AU1100 LCD controller device driver */
 442
 443 int au1100fb_drv_probe(struct device *dev)
 444 {
 445         struct au1100fb_device *fbdev = NULL;
 446         struct resource *regs_res;
 447         unsigned long page;
 448         u32 sys_clksrc;
 449
 450         if (!dev)
 451                         return -EINVAL;
 452
 453         /* Allocate new device private */
 454         if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
 455                 print_err("fail to allocate device private record");
 456                 return -ENOMEM;
 457         }
 458         memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
 459
 460         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
 461
 462         dev_set_drvdata(dev, (void*)fbdev);
 463
 464         /* Allocate region for our registers and map them */
 465         if (!(regs_res = platform_get_resource(to_platform_device(dev),
 466                                         IORESOURCE_MEM, 0))) {
 467                 print_err("fail to retrieve registers resource");
 468                 return -EFAULT;
 469         }
 470
 471         au1100fb_fix.mmio_start = regs_res->start;
 472         au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
 473
 474         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
 475                                 DRIVER_NAME)) {
 476                 print_err("fail to lock memory region at 0x%08lx",
 477                                 au1100fb_fix.mmio_start);
 478                 return -EBUSY;
 479         }
 480
 481         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 482
 483         print_dbg("Register memory map at %p", fbdev->regs);
 484         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 485
 486
 487
 488         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 489         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 490                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 491
 492         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
 493                                         &fbdev->fb_phys, GFP_KERNEL);
 494         if (!fbdev->fb_mem) {
 495                 print_err("fail to allocate frambuffer (size: %dK))",
 496                           fbdev->fb_len / 1024);
 497                 return -ENOMEM;
 498         }
 499
 500         au1100fb_fix.smem_start = fbdev->fb_phys;
 501         au1100fb_fix.smem_len = fbdev->fb_len;
 502
 503         /*
 504          * Set page reserved so that mmap will work. This is necessary
 505          * since we'll be remapping normal memory.
 506          */
 507         for (page = (unsigned long)fbdev->fb_mem;
 508              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 509              page += PAGE_SIZE) {
 510 #if CONFIG_DMA_NONCOHERENT
 511                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
 512 #else
 513                 SetPageReserved(virt_to_page(page));
 514 #endif
 515         }
 516
 517         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 518         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 519
 520         /* Setup LCD clock to AUX (48 MHz) */
 521         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 522         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 523
 524         /* load the panel info into the var struct */
 525         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 526         au1100fb_var.xres = fbdev->panel->xres;
 527         au1100fb_var.xres_virtual = au1100fb_var.xres;
 528         au1100fb_var.yres = fbdev->panel->yres;
 529         au1100fb_var.yres_virtual = au1100fb_var.yres;
 530
 531         fbdev->info.screen_base = fbdev->fb_mem;
 532         fbdev->info.fbops = &au1100fb_ops;
 533         fbdev->info.fix = au1100fb_fix;
 534
 535         if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
 536                 return -ENOMEM;
 537         }
 538         memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
 539
 540         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 541                 print_err("Fail to allocate colormap (%d entries)",
 542                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 543                 kfree(fbdev->info.pseudo_palette);
 544                 return -EFAULT;
 545         }
 546
 547         fbdev->info.var = au1100fb_var;
 548
 549         /* Set h/w registers */
 550         au1100fb_setmode(fbdev);
 551
 552         /* Register new framebuffer */
 553         if (register_framebuffer(&fbdev->info) < 0) {
 554                 print_err("cannot register new framebuffer");
 555                 goto failed;
 556         }
 557
 558         return 0;
 559
 560 failed:
 561         if (fbdev->regs) {
 562                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 563         }
 564         if (fbdev->fb_mem) {
 565                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
 566         }
 567         if (fbdev->info.cmap.len != 0) {
 568                 fb_dealloc_cmap(&fbdev->info.cmap);
 569         }
 570         kfree(fbdev);
 571         dev_set_drvdata(dev, NULL);
 572
 573         return 0;
 574 }
 575
 576 int au1100fb_drv_remove(struct device *dev)
 577 {
 578         struct au1100fb_device *fbdev = NULL;
 579
 580         if (!dev)
 581                 return -ENODEV;
 582
 583         fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
 584
 585 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 586         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 587 #endif
 588         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 589
 590         /* Clean up all probe data */
 591         unregister_framebuffer(&fbdev->info);
 592
 593         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 594
 595         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
 596
 597         fb_dealloc_cmap(&fbdev->info.cmap);
 598         kfree(fbdev->info.pseudo_palette);
 599         kfree((void*)fbdev);
 600
 601         return 0;
 602 }
 603
 604 #ifdef CONFIG_PM
 605 static u32 sys_clksrc;
 606 static struct au1100fb_regs fbregs;
 607
 608 int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
 609 {
 610         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
 611
 612         if (!fbdev)
 613                 return 0;
 614
 615         /* Save the clock source state */
 616         sys_clksrc = au_readl(SYS_CLKSRC);
 617
 618         /* Blank the LCD */
 619         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 620
 621         /* Stop LCD clocking */
 622         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 623
 624         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 625
 626         return 0;
 627 }
 628
 629 int au1100fb_drv_resume(struct device *dev)
 630 {
 631         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
 632
 633         if (!fbdev)
 634                 return 0;
 635
 636         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 637
 638         /* Restart LCD clocking */
 639         au_writel(sys_clksrc, SYS_CLKSRC);
 640
 641         /* Unblank the LCD */
 642         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 643
 644         return 0;
 645 }
 646 #else
 647 #define au1100fb_drv_suspend NULL
 648 #define au1100fb_drv_resume NULL
 649 #endif
 650
 651 static struct device_driver au1100fb_driver = {
 652         .name           = "au1100-lcd",
 653         .bus            = &platform_bus_type,
 654
 655         .probe          = au1100fb_drv_probe,
 656         .remove         = au1100fb_drv_remove,
 657         .suspend        = au1100fb_drv_suspend,
 658         .resume         = au1100fb_drv_resume,
 659 };
 660
 661 /*-------------------------------------------------------------------------*/
 662
 663 /* Kernel driver */
 664
 665 int au1100fb_setup(char *options)
 666 {
 667         char* this_opt;
 668         int num_panels = ARRAY_SIZE(known_lcd_panels);
 669         char* mode = NULL;
 670         int panel_idx = 0;
 671
 672         if (num_panels <= 0) {
 673                 print_err("No LCD panels supported by driver!");
 674                 return -EFAULT;
 675                         }
 676
 677         if (options) {
 678                 while ((this_opt = strsep(&options,",")) != NULL) {
 679                         /* Panel option */
 680                 if (!strncmp(this_opt, "panel:", 6)) {
 681                                 int i;
 682                                 this_opt += 6;
 683                                 for (i = 0; i < num_panels; i++) {
 684                                         if (!strncmp(this_opt,
 685                                                      known_lcd_panels[i].name,
 686                                                         strlen(this_opt))) {
 687                                                 panel_idx = i;
 688                                         break;
 689                                 }
 690                         }
 691                                 if (i >= num_panels) {
 692                                         print_warn("Panel %s not supported!", this_opt);
 693                                 }
 694                         }
 695                         /* Mode option (only option that start with digit) */
 696                         else if (isdigit(this_opt[0])) {
 697                                 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
 698                                 strncpy(mode, this_opt, strlen(this_opt) + 1);
 699                         }
 700                         /* Unsupported option */
 701                         else {
 702                                 print_warn("Unsupported option \"%s\"", this_opt);
 703                 }
 704                 }
 705         }
 706
 707         drv_info.panel_idx = panel_idx;
 708         drv_info.opt_mode = mode;
 709
 710         print_info("Panel=%s Mode=%s",
 711                         known_lcd_panels[drv_info.panel_idx].name,
 712                         drv_info.opt_mode ? drv_info.opt_mode : "default");
 713
 714         return 0;
 715 }
 716
 717 int __init au1100fb_init(void)
 718 {
 719         char* options;
 720         int ret;
 721
 722         print_info("" DRIVER_DESC "");
 723
 724         memset(&drv_info, 0, sizeof(drv_info));
 725
 726         if (fb_get_options(DRIVER_NAME, &options))
 727                 return -ENODEV;
 728
 729         /* Setup driver with options */
 730         ret = au1100fb_setup(options);
 731         if (ret < 0) {
 732                 print_err("Fail to setup driver");
 733                 return ret;
 734         }
 735
 736         return driver_register(&au1100fb_driver);
 737 }
 738
 739 void __exit au1100fb_cleanup(void)
 740 {
 741         driver_unregister(&au1100fb_driver);
 742
 743         kfree(drv_info.opt_mode);
 744 }
 745
 746 module_init(au1100fb_init);
 747 module_exit(au1100fb_cleanup);
 748
 749 MODULE_DESCRIPTION(DRIVER_DESC);
 750 MODULE_LICENSE("GPL");