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