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  * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
  12  *
  13  * Copyright 2002 MontaVista Software
  14  * Author: MontaVista Software, Inc.
  15  *              ppopov@mvista.com or source@mvista.com
  16  *
  17  * Copyright 2002 Alchemy Semiconductor
  18  * Author: Alchemy Semiconductor
  19  *
  20  * Based on:
  21  * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
  22  *  Created 28 Dec 1997 by Geert Uytterhoeven
  23  *
  24  *  This program is free software; you can redistribute  it and/or modify it
  25  *  under  the terms of  the GNU General  Public License as published by the
  26  *  Free Software Foundation;  either version 2 of the  License, or (at your
  27  *  option) any later version.
  28  *
  29  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  30  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  31  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  32  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  33  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  34  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  35  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  36  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  37  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  38  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39  *
  40  *  You should have received a copy of the  GNU General Public License along
  41  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  42  *  675 Mass Ave, Cambridge, MA 02139, USA.
  43  */
  44 #include <linux/module.h>
  45 #include <linux/kernel.h>
  46 #include <linux/errno.h>
  47 #include <linux/string.h>
  48 #include <linux/mm.h>
  49 #include <linux/fb.h>
  50 #include <linux/init.h>
  51 #include <linux/interrupt.h>
  52 #include <linux/ctype.h>
  53 #include <linux/dma-mapping.h>
  54 #include <linux/platform_device.h>
  55 #include <linux/slab.h>
  56
  57 #include <asm/mach-au1x00/au1000.h>
  58
  59 #define DEBUG 0
  60
  61 #include "au1100fb.h"
  62
  63 /*
  64  * Sanity check. If this is a new Au1100 based board, search for
  65  * the PB1100 ifdefs to make sure you modify the code accordingly.
  66  */
  67 #if defined(CONFIG_MIPS_PB1100)
  68   #include <asm/mach-pb1x00/pb1100.h>
  69 #elif defined(CONFIG_MIPS_DB1100)
  70   #include <asm/mach-db1x00/db1x00.h>
  71 #else
  72   #error "Unknown Au1100 board, Au1100 FB driver not supported"
  73 #endif
  74
  75 #define DRIVER_NAME "au1100fb"
  76 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
  77
  78 #define to_au1100fb_device(_info) \
  79           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
  80
  81 /* Bitfields format supported by the controller. Note that the order of formats
  82  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
  83  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
  84  */
  85 struct fb_bitfield rgb_bitfields[][4] =
  86 {
  87         /*     Red,        Green,        Blue,       Transp   */
  88         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  89         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  90         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
  91         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
  92         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
  93
  94         /* The last is used to describe 12bpp format */
  95         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
  96 };
  97
  98 static struct fb_fix_screeninfo au1100fb_fix __devinitdata = {
  99         .id             = "AU1100 FB",
 100         .xpanstep       = 1,
 101         .ypanstep       = 1,
 102         .type           = FB_TYPE_PACKED_PIXELS,
 103         .accel          = FB_ACCEL_NONE,
 104 };
 105
 106 static struct fb_var_screeninfo au1100fb_var __devinitdata = {
 107         .activate       = FB_ACTIVATE_NOW,
 108         .height         = -1,
 109         .width          = -1,
 110         .vmode          = FB_VMODE_NONINTERLACED,
 111 };
 112
 113 static struct au1100fb_drv_info drv_info;
 114
 115 static int nocursor = 0;
 116 module_param(nocursor, int, 0644);
 117 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
 118
 119 /* fb_blank
 120  * Blank the screen. Depending on the mode, the screen will be
 121  * activated with the backlight color, or desactivated
 122  */
 123 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 124 {
 125         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 126
 127         print_dbg("fb_blank %d %p", blank_mode, fbi);
 128
 129         switch (blank_mode) {
 130
 131         case VESA_NO_BLANKING:
 132                         /* Turn on panel */
 133                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 134 #ifdef CONFIG_MIPS_PB1100
 135                         if (drv_info.panel_idx == 1) {
 136                                 au_writew(au_readw(PB1100_G_CONTROL)
 137                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 138                         PB1100_G_CONTROL);
 139                         }
 140 #endif
 141                 au_sync();
 142                 break;
 143
 144         case VESA_VSYNC_SUSPEND:
 145         case VESA_HSYNC_SUSPEND:
 146         case VESA_POWERDOWN:
 147                         /* Turn off panel */
 148                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 149 #ifdef CONFIG_MIPS_PB1100
 150                         if (drv_info.panel_idx == 1) {
 151                                 au_writew(au_readw(PB1100_G_CONTROL)
 152                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 153                         PB1100_G_CONTROL);
 154                         }
 155 #endif
 156                 au_sync();
 157                 break;
 158         default:
 159                 break;
 160
 161         }
 162         return 0;
 163 }
 164
 165 /*
 166  * Set hardware with var settings. This will enable the controller with a specific
 167  * mode, normally validated with the fb_check_var method
 168          */
 169 int au1100fb_setmode(struct au1100fb_device *fbdev)
 170 {
 171         struct fb_info *info = &fbdev->info;
 172         u32 words;
 173         int index;
 174
 175         if (!fbdev)
 176                 return -EINVAL;
 177
 178         /* Update var-dependent FB info */
 179         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 180                 if (info->var.bits_per_pixel <= 8) {
 181                         /* palettized */
 182                         info->var.red.offset    = 0;
 183                         info->var.red.length    = info->var.bits_per_pixel;
 184                         info->var.red.msb_right = 0;
 185
 186                         info->var.green.offset  = 0;
 187                         info->var.green.length  = info->var.bits_per_pixel;
 188                         info->var.green.msb_right = 0;
 189
 190                         info->var.blue.offset   = 0;
 191                         info->var.blue.length   = info->var.bits_per_pixel;
 192                         info->var.blue.msb_right = 0;
 193
 194                         info->var.transp.offset = 0;
 195                         info->var.transp.length = 0;
 196                         info->var.transp.msb_right = 0;
 197
 198                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 199                         info->fix.line_length = info->var.xres_virtual /
 200                                                         (8/info->var.bits_per_pixel);
 201                 } else {
 202                         /* non-palettized */
 203                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 204                         info->var.red = rgb_bitfields[index][0];
 205                         info->var.green = rgb_bitfields[index][1];
 206                         info->var.blue = rgb_bitfields[index][2];
 207                         info->var.transp = rgb_bitfields[index][3];
 208
 209                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 210                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 211                 }
 212         } else {
 213                 /* mono */
 214                 info->fix.visual = FB_VISUAL_MONO10;
 215                 info->fix.line_length = info->var.xres_virtual / 8;
 216         }
 217
 218         info->screen_size = info->fix.line_length * info->var.yres_virtual;
 219         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
 220                                 >> LCD_CONTROL_SM_BIT) * 90;
 221
 222         /* Determine BPP mode and format */
 223         fbdev->regs->lcd_control = fbdev->panel->control_base;
 224         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 225         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 226         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 227         fbdev->regs->lcd_intenable = 0;
 228         fbdev->regs->lcd_intstatus = 0;
 229         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 230
 231         if (panel_is_dual(fbdev->panel)) {
 232                 /* Second panel display seconf half of screen if possible,
 233                  * otherwise display the same as the first panel */
 234                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
 235                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 236                                                           (info->fix.line_length *
 237                                                           (info->var.yres_virtual >> 1)));
 238                 } else {
 239                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 240                 }
 241         }
 242
 243         words = info->fix.line_length / sizeof(u32);
 244         if (!info->var.rotate || (info->var.rotate == 180)) {
 245                 words *= info->var.yres_virtual;
 246                 if (info->var.rotate /* 180 */) {
 247                         words -= (words % 8); /* should be divisable by 8 */
 248                 }
 249         }
 250         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 251
 252         fbdev->regs->lcd_pwmdiv = 0;
 253         fbdev->regs->lcd_pwmhi = 0;
 254
 255         /* Resume controller */
 256         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 257         mdelay(10);
 258         au1100fb_fb_blank(VESA_NO_BLANKING, info);
 259
 260         return 0;
 261 }
 262
 263 /* fb_setcolreg
 264  * Set color in LCD palette.
 265  */
 266 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 267 {
 268         struct au1100fb_device *fbdev;
 269         u32 *palette;
 270         u32 value;
 271
 272         fbdev = to_au1100fb_device(fbi);
 273         palette = fbdev->regs->lcd_pallettebase;
 274
 275         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 276                 return -EINVAL;
 277
 278         if (fbi->var.grayscale) {
 279                 /* Convert color to grayscale */
 280                 red = green = blue =
 281                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 282         }
 283
 284         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 285                 /* Place color in the pseudopalette */
 286                 if (regno > 16)
 287                         return -EINVAL;
 288
 289                 palette = (u32*)fbi->pseudo_palette;
 290
 291                 red   >>= (16 - fbi->var.red.length);
 292                 green >>= (16 - fbi->var.green.length);
 293                 blue  >>= (16 - fbi->var.blue.length);
 294
 295                 value = (red   << fbi->var.red.offset)  |
 296                         (green << fbi->var.green.offset)|
 297                         (blue  << fbi->var.blue.offset);
 298                 value &= 0xFFFF;
 299
 300         } else if (panel_is_active(fbdev->panel)) {
 301                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 302                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 303                 value &= 0xFFFF;
 304
 305         } else if (panel_is_color(fbdev->panel)) {
 306                 /* COLOR STN MODE */
 307                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 308                         ((green >> 8) & 0x00F0) |
 309                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 310                 value &= 0xFFF;
 311         } else {
 312                 /* MONOCHROME MODE */
 313                 value = (green >> 12) & 0x000F;
 314                 value &= 0xF;
 315         }
 316
 317         palette[regno] = value;
 318
 319         return 0;
 320 }
 321
 322 /* fb_pan_display
 323  * Pan display in x and/or y as specified
 324  */
 325 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 326 {
 327         struct au1100fb_device *fbdev;
 328         int dy;
 329
 330         fbdev = to_au1100fb_device(fbi);
 331
 332         print_dbg("fb_pan_display %p %p", var, fbi);
 333
 334         if (!var || !fbdev) {
 335                 return -EINVAL;
 336         }
 337
 338         if (var->xoffset - fbi->var.xoffset) {
 339                 /* No support for X panning for now! */
 340                 return -EINVAL;
 341         }
 342
 343         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 344         dy = var->yoffset - fbi->var.yoffset;
 345         if (dy) {
 346
 347                 u32 dmaaddr;
 348
 349                 print_dbg("Panning screen of %d lines", dy);
 350
 351                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 352                 dmaaddr += (fbi->fix.line_length * dy);
 353
 354                 /* TODO: Wait for current frame to finished */
 355                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 356
 357                 if (panel_is_dual(fbdev->panel)) {
 358                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 359                         dmaaddr += (fbi->fix.line_length * dy);
 360                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 361         }
 362         }
 363         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 364
 365         return 0;
 366 }
 367
 368 /* fb_rotate
 369  * Rotate the display of this angle. This doesn't seems to be used by the core,
 370  * but as our hardware supports it, so why not implementing it...
 371  */
 372 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 373 {
 374         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 375
 376         print_dbg("fb_rotate %p %d", fbi, angle);
 377
 378         if (fbdev && (angle > 0) && !(angle % 90)) {
 379
 380                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 381
 382                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 383                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 384
 385                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 386         }
 387 }
 388
 389 /* fb_mmap
 390  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 391  * to allow the use of the TLB streaming flag (CCA=6)
 392  */
 393 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 394 {
 395         struct au1100fb_device *fbdev;
 396         unsigned int len;
 397         unsigned long start=0, off;
 398
 399         fbdev = to_au1100fb_device(fbi);
 400
 401         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 402                 return -EINVAL;
 403         }
 404
 405         start = fbdev->fb_phys & PAGE_MASK;
 406         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 407
 408         off = vma->vm_pgoff << PAGE_SHIFT;
 409
 410         if ((vma->vm_end - vma->vm_start + off) > len) {
 411                 return -EINVAL;
 412         }
 413
 414         off += start;
 415         vma->vm_pgoff = off >> PAGE_SHIFT;
 416
 417         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 418         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 419
 420         vma->vm_flags |= VM_IO;
 421
 422         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 423                                 vma->vm_end - vma->vm_start,
 424                                 vma->vm_page_prot)) {
 425                 return -EAGAIN;
 426         }
 427
 428         return 0;
 429 }
 430
 431 /* fb_cursor
 432  * Used to disable cursor drawing...
 433  */
 434 int au1100fb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 435 {
 436         if (nocursor)
 437                 return 0;
 438         else
 439                 return -EINVAL; /* just to force soft_cursor() call */
 440 }
 441
 442 static struct fb_ops au1100fb_ops =
 443 {
 444         .owner                  = THIS_MODULE,
 445         .fb_setcolreg           = au1100fb_fb_setcolreg,
 446         .fb_blank               = au1100fb_fb_blank,
 447         .fb_pan_display         = au1100fb_fb_pan_display,
 448         .fb_fillrect            = cfb_fillrect,
 449         .fb_copyarea            = cfb_copyarea,
 450         .fb_imageblit           = cfb_imageblit,
 451         .fb_rotate              = au1100fb_fb_rotate,
 452         .fb_mmap                = au1100fb_fb_mmap,
 453         .fb_cursor              = au1100fb_fb_cursor,
 454 };
 455
 456
 457 /*-------------------------------------------------------------------------*/
 458
 459 /* AU1100 LCD controller device driver */
 460
 461 static int __devinit au1100fb_drv_probe(struct platform_device *dev)
 462 {
 463         struct au1100fb_device *fbdev = NULL;
 464         struct resource *regs_res;
 465         unsigned long page;
 466         u32 sys_clksrc;
 467
 468         if (!dev)
 469                         return -EINVAL;
 470
 471         /* Allocate new device private */
 472         if (!(fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
 473                 print_err("fail to allocate device private record");
 474                 return -ENOMEM;
 475         }
 476
 477         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
 478
 479         platform_set_drvdata(dev, (void *)fbdev);
 480
 481         /* Allocate region for our registers and map them */
 482         if (!(regs_res = platform_get_resource(to_platform_device(dev),
 483                                         IORESOURCE_MEM, 0))) {
 484                 print_err("fail to retrieve registers resource");
 485                 return -EFAULT;
 486         }
 487
 488         au1100fb_fix.mmio_start = regs_res->start;
 489         au1100fb_fix.mmio_len = resource_size(regs_res);
 490
 491         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
 492                                 DRIVER_NAME)) {
 493                 print_err("fail to lock memory region at 0x%08lx",
 494                                 au1100fb_fix.mmio_start);
 495                 return -EBUSY;
 496         }
 497
 498         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 499
 500         print_dbg("Register memory map at %p", fbdev->regs);
 501         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 502
 503
 504
 505         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 506         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 507                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 508
 509         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
 510                                         &fbdev->fb_phys, GFP_KERNEL);
 511         if (!fbdev->fb_mem) {
 512                 print_err("fail to allocate frambuffer (size: %dK))",
 513                           fbdev->fb_len / 1024);
 514                 return -ENOMEM;
 515         }
 516
 517         au1100fb_fix.smem_start = fbdev->fb_phys;
 518         au1100fb_fix.smem_len = fbdev->fb_len;
 519
 520         /*
 521          * Set page reserved so that mmap will work. This is necessary
 522          * since we'll be remapping normal memory.
 523          */
 524         for (page = (unsigned long)fbdev->fb_mem;
 525              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 526              page += PAGE_SIZE) {
 527 #if CONFIG_DMA_NONCOHERENT
 528                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
 529 #else
 530                 SetPageReserved(virt_to_page(page));
 531 #endif
 532         }
 533
 534         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 535         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 536
 537         /* Setup LCD clock to AUX (48 MHz) */
 538         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 539         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 540
 541         /* load the panel info into the var struct */
 542         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 543         au1100fb_var.xres = fbdev->panel->xres;
 544         au1100fb_var.xres_virtual = au1100fb_var.xres;
 545         au1100fb_var.yres = fbdev->panel->yres;
 546         au1100fb_var.yres_virtual = au1100fb_var.yres;
 547
 548         fbdev->info.screen_base = fbdev->fb_mem;
 549         fbdev->info.fbops = &au1100fb_ops;
 550         fbdev->info.fix = au1100fb_fix;
 551
 552         if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
 553                 return -ENOMEM;
 554         }
 555
 556         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 557                 print_err("Fail to allocate colormap (%d entries)",
 558                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 559                 kfree(fbdev->info.pseudo_palette);
 560                 return -EFAULT;
 561         }
 562
 563         fbdev->info.var = au1100fb_var;
 564
 565         /* Set h/w registers */
 566         au1100fb_setmode(fbdev);
 567
 568         /* Register new framebuffer */
 569         if (register_framebuffer(&fbdev->info) < 0) {
 570                 print_err("cannot register new framebuffer");
 571                 goto failed;
 572         }
 573
 574         return 0;
 575
 576 failed:
 577         if (fbdev->regs) {
 578                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 579         }
 580         if (fbdev->fb_mem) {
 581                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
 582         }
 583         if (fbdev->info.cmap.len != 0) {
 584                 fb_dealloc_cmap(&fbdev->info.cmap);
 585         }
 586         kfree(fbdev);
 587         platform_set_drvdata(dev, NULL);
 588
 589         return 0;
 590 }
 591
 592 int au1100fb_drv_remove(struct platform_device *dev)
 593 {
 594         struct au1100fb_device *fbdev = NULL;
 595
 596         if (!dev)
 597                 return -ENODEV;
 598
 599         fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
 600
 601 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 602         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 603 #endif
 604         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 605
 606         /* Clean up all probe data */
 607         unregister_framebuffer(&fbdev->info);
 608
 609         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 610
 611         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
 612
 613         fb_dealloc_cmap(&fbdev->info.cmap);
 614         kfree(fbdev->info.pseudo_palette);
 615         kfree((void*)fbdev);
 616
 617         return 0;
 618 }
 619
 620 #ifdef CONFIG_PM
 621 static u32 sys_clksrc;
 622 static struct au1100fb_regs fbregs;
 623
 624 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 625 {
 626         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 627
 628         if (!fbdev)
 629                 return 0;
 630
 631         /* Save the clock source state */
 632         sys_clksrc = au_readl(SYS_CLKSRC);
 633
 634         /* Blank the LCD */
 635         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 636
 637         /* Stop LCD clocking */
 638         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 639
 640         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 641
 642         return 0;
 643 }
 644
 645 int au1100fb_drv_resume(struct platform_device *dev)
 646 {
 647         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 648
 649         if (!fbdev)
 650                 return 0;
 651
 652         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 653
 654         /* Restart LCD clocking */
 655         au_writel(sys_clksrc, SYS_CLKSRC);
 656
 657         /* Unblank the LCD */
 658         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 659
 660         return 0;
 661 }
 662 #else
 663 #define au1100fb_drv_suspend NULL
 664 #define au1100fb_drv_resume NULL
 665 #endif
 666
 667 static struct platform_driver au1100fb_driver = {
 668         .driver = {
 669                 .name           = "au1100-lcd",
 670                 .owner          = THIS_MODULE,
 671         },
 672         .probe          = au1100fb_drv_probe,
 673         .remove         = au1100fb_drv_remove,
 674         .suspend        = au1100fb_drv_suspend,
 675         .resume         = au1100fb_drv_resume,
 676 };
 677
 678 /*-------------------------------------------------------------------------*/
 679
 680 /* Kernel driver */
 681
 682 int au1100fb_setup(char *options)
 683 {
 684         char* this_opt;
 685         int num_panels = ARRAY_SIZE(known_lcd_panels);
 686         char* mode = NULL;
 687         int panel_idx = 0;
 688
 689         if (num_panels <= 0) {
 690                 print_err("No LCD panels supported by driver!");
 691                 return -EFAULT;
 692                         }
 693
 694         if (options) {
 695                 while ((this_opt = strsep(&options,",")) != NULL) {
 696                         /* Panel option */
 697                         if (!strncmp(this_opt, "panel:", 6)) {
 698                                 int i;
 699                                 this_opt += 6;
 700                                 for (i = 0; i < num_panels; i++) {
 701                                         if (!strncmp(this_opt,
 702                                                      known_lcd_panels[i].name,
 703                                                         strlen(this_opt))) {
 704                                                 panel_idx = i;
 705                                                 break;
 706                                         }
 707                                 }
 708                                 if (i >= num_panels) {
 709                                         print_warn("Panel %s not supported!", this_opt);
 710                                 }
 711                         }
 712                         if (!strncmp(this_opt, "nocursor", 8)) {
 713                                 this_opt += 8;
 714                                 nocursor = 1;
 715                                 print_info("Cursor disabled");
 716                         }
 717                         /* Mode option (only option that start with digit) */
 718                         else if (isdigit(this_opt[0])) {
 719                                 mode = kstrdup(this_opt, GFP_KERNEL);
 720                                 if (!mode) {
 721                                         print_err("memory allocation failed");
 722                                         return -ENOMEM;
 723                                 }
 724                         }
 725                         /* Unsupported option */
 726                         else {
 727                                 print_warn("Unsupported option \"%s\"", this_opt);
 728                         }
 729                 }
 730         }
 731
 732         drv_info.panel_idx = panel_idx;
 733         drv_info.opt_mode = mode;
 734
 735         print_info("Panel=%s Mode=%s",
 736                         known_lcd_panels[drv_info.panel_idx].name,
 737                         drv_info.opt_mode ? drv_info.opt_mode : "default");
 738
 739         return 0;
 740 }
 741
 742 int __init au1100fb_init(void)
 743 {
 744         char* options;
 745         int ret;
 746
 747         print_info("" DRIVER_DESC "");
 748
 749         memset(&drv_info, 0, sizeof(drv_info));
 750
 751         if (fb_get_options(DRIVER_NAME, &options))
 752                 return -ENODEV;
 753
 754         /* Setup driver with options */
 755         ret = au1100fb_setup(options);
 756         if (ret < 0) {
 757                 print_err("Fail to setup driver");
 758                 return ret;
 759         }
 760
 761         return platform_driver_register(&au1100fb_driver);
 762 }
 763
 764 void __exit au1100fb_cleanup(void)
 765 {
 766         platform_driver_unregister(&au1100fb_driver);
 767
 768         kfree(drv_info.opt_mode);
 769 }
 770
 771 module_init(au1100fb_init);
 772 module_exit(au1100fb_cleanup);
 773
 774 MODULE_DESCRIPTION(DRIVER_DESC);
 775 MODULE_LICENSE("GPL");