git.oblomov.eu Git - linux-2.6/blob - 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
 168         /* Determine BPP mode and format */
 169         fbdev->regs->lcd_control = fbdev->panel->control_base |
 170                             ((info->var.rotate/90) << LCD_CONTROL_SM_BIT);
 171
 172         fbdev->regs->lcd_intenable = 0;
 173         fbdev->regs->lcd_intstatus = 0;
 174
 175         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 176
 177         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 178
 179         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 180
 181         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 182
 183         if (panel_is_dual(fbdev->panel)) {
 184                 /* Second panel display seconf half of screen if possible,
 185                  * otherwise display the same as the first panel */
 186                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
 187                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 188                                                           (info->fix.line_length *
 189                                                           (info->var.yres_virtual >> 1)));
 190                 } else {
 191                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 192                 }
 193         }
 194
 195         words = info->fix.line_length / sizeof(u32);
 196         if (!info->var.rotate || (info->var.rotate == 180)) {
 197                 words *= info->var.yres_virtual;
 198                 if (info->var.rotate /* 180 */) {
 199                         words -= (words % 8); /* should be divisable by 8 */
 200                 }
 201         }
 202         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 203
 204         fbdev->regs->lcd_pwmdiv = 0;
 205         fbdev->regs->lcd_pwmhi = 0;
 206
 207         /* Resume controller */
 208         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 209
 210         return 0;
 211 }
 212
 213 /* fb_setcolreg
 214  * Set color in LCD palette.
 215  */
 216 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 217 {
 218         struct au1100fb_device *fbdev;
 219         u32 *palette;
 220         u32 value;
 221
 222         fbdev = to_au1100fb_device(fbi);
 223         palette = fbdev->regs->lcd_pallettebase;
 224
 225         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 226                 return -EINVAL;
 227
 228         if (fbi->var.grayscale) {
 229                 /* Convert color to grayscale */
 230                 red = green = blue =
 231                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 232         }
 233
 234         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 235                 /* Place color in the pseudopalette */
 236                 if (regno > 16)
 237                         return -EINVAL;
 238
 239                 palette = (u32*)fbi->pseudo_palette;
 240
 241                 red   >>= (16 - fbi->var.red.length);
 242                 green >>= (16 - fbi->var.green.length);
 243                 blue  >>= (16 - fbi->var.blue.length);
 244
 245                 value = (red   << fbi->var.red.offset)  |
 246                         (green << fbi->var.green.offset)|
 247                         (blue  << fbi->var.blue.offset);
 248                 value &= 0xFFFF;
 249
 250         } else if (panel_is_active(fbdev->panel)) {
 251                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 252                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 253                 value &= 0xFFFF;
 254
 255         } else if (panel_is_color(fbdev->panel)) {
 256                 /* COLOR STN MODE */
 257                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 258                         ((green >> 8) & 0x00F0) |
 259                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 260                 value &= 0xFFF;
 261         } else {
 262                 /* MONOCHROME MODE */
 263                 value = (green >> 12) & 0x000F;
 264                 value &= 0xF;
 265         }
 266
 267         palette[regno] = value;
 268
 269         return 0;
 270 }
 271
 272 /* fb_blank
 273  * Blank the screen. Depending on the mode, the screen will be
 274  * activated with the backlight color, or desactivated
 275  */
 276 int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 277 {
 278         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 279
 280         print_dbg("fb_blank %d %p", blank_mode, fbi);
 281
 282         switch (blank_mode) {
 283
 284         case VESA_NO_BLANKING:
 285                         /* Turn on panel */
 286                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 287 #ifdef CONFIG_MIPS_PB1100
 288                         if (drv_info.panel_idx == 1) {
 289                                 au_writew(au_readw(PB1100_G_CONTROL)
 290                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 291                         PB1100_G_CONTROL);
 292                         }
 293 #endif
 294                 au_sync();
 295                 break;
 296
 297         case VESA_VSYNC_SUSPEND:
 298         case VESA_HSYNC_SUSPEND:
 299         case VESA_POWERDOWN:
 300                         /* Turn off panel */
 301                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 302 #ifdef CONFIG_MIPS_PB1100
 303                         if (drv_info.panel_idx == 1) {
 304                                 au_writew(au_readw(PB1100_G_CONTROL)
 305                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 306                         PB1100_G_CONTROL);
 307                         }
 308 #endif
 309                 au_sync();
 310                 break;
 311         default:
 312                 break;
 313
 314         }
 315         return 0;
 316 }
 317
 318 /* fb_pan_display
 319  * Pan display in x and/or y as specified
 320  */
 321 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 322 {
 323         struct au1100fb_device *fbdev;
 324         int dy;
 325
 326         fbdev = to_au1100fb_device(fbi);
 327
 328         print_dbg("fb_pan_display %p %p", var, fbi);
 329
 330         if (!var || !fbdev) {
 331                 return -EINVAL;
 332         }
 333
 334         if (var->xoffset - fbi->var.xoffset) {
 335                 /* No support for X panning for now! */
 336                 return -EINVAL;
 337         }
 338
 339         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 340         dy = var->yoffset - fbi->var.yoffset;
 341         if (dy) {
 342
 343                 u32 dmaaddr;
 344
 345                 print_dbg("Panning screen of %d lines", dy);
 346
 347                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 348                 dmaaddr += (fbi->fix.line_length * dy);
 349
 350                 /* TODO: Wait for current frame to finished */
 351                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 352
 353                 if (panel_is_dual(fbdev->panel)) {
 354                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 355                         dmaaddr += (fbi->fix.line_length * dy);
 356                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 357         }
 358         }
 359         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 360
 361         return 0;
 362 }
 363
 364 /* fb_rotate
 365  * Rotate the display of this angle. This doesn't seems to be used by the core,
 366  * but as our hardware supports it, so why not implementing it...
 367  */
 368 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 369 {
 370         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 371
 372         print_dbg("fb_rotate %p %d", fbi, angle);
 373
 374         if (fbdev && (angle > 0) && !(angle % 90)) {
 375
 376                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 377
 378                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 379                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 380
 381                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 382         }
 383 }
 384
 385 /* fb_mmap
 386  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 387  * to allow the use of the TLB streaming flag (CCA=6)
 388  */
 389 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 390 {
 391         struct au1100fb_device *fbdev;
 392         unsigned int len;
 393         unsigned long start=0, off;
 394
 395         fbdev = to_au1100fb_device(fbi);
 396
 397         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 398                 return -EINVAL;
 399         }
 400
 401         start = fbdev->fb_phys & PAGE_MASK;
 402         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 403
 404         off = vma->vm_pgoff << PAGE_SHIFT;
 405
 406         if ((vma->vm_end - vma->vm_start + off) > len) {
 407                 return -EINVAL;
 408         }
 409
 410         off += start;
 411         vma->vm_pgoff = off >> PAGE_SHIFT;
 412
 413         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 414         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 415
 416         vma->vm_flags |= VM_IO;
 417
 418         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 419                                 vma->vm_end - vma->vm_start,
 420                                 vma->vm_page_prot)) {
 421                 return -EAGAIN;
 422         }
 423
 424         return 0;
 425 }
 426
 427 static struct fb_ops au1100fb_ops =
 428 {
 429         .owner                  = THIS_MODULE,
 430         .fb_setcolreg           = au1100fb_fb_setcolreg,
 431         .fb_blank               = au1100fb_fb_blank,
 432         .fb_pan_display         = au1100fb_fb_pan_display,
 433         .fb_fillrect            = cfb_fillrect,
 434         .fb_copyarea            = cfb_copyarea,
 435         .fb_imageblit           = cfb_imageblit,
 436         .fb_rotate              = au1100fb_fb_rotate,
 437         .fb_mmap                = au1100fb_fb_mmap,
 438 };
 439
 440
 441 /*-------------------------------------------------------------------------*/
 442
 443 /* AU1100 LCD controller device driver */
 444
 445 int au1100fb_drv_probe(struct device *dev)
 446 {
 447         struct au1100fb_device *fbdev = NULL;
 448         struct resource *regs_res;
 449         unsigned long page;
 450         u32 sys_clksrc;
 451
 452         if (!dev)
 453                         return -EINVAL;
 454
 455         /* Allocate new device private */
 456         if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
 457                 print_err("fail to allocate device private record");
 458                 return -ENOMEM;
 459         }
 460         memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
 461
 462         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
 463
 464         dev_set_drvdata(dev, (void*)fbdev);
 465
 466         /* Allocate region for our registers and map them */
 467         if (!(regs_res = platform_get_resource(to_platform_device(dev),
 468                                         IORESOURCE_MEM, 0))) {
 469                 print_err("fail to retrieve registers resource");
 470                 return -EFAULT;
 471         }
 472
 473         au1100fb_fix.mmio_start = regs_res->start;
 474         au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
 475
 476         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
 477                                 DRIVER_NAME)) {
 478                 print_err("fail to lock memory region at 0x%08lx",
 479                                 au1100fb_fix.mmio_start);
 480                 return -EBUSY;
 481         }
 482
 483         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 484
 485         print_dbg("Register memory map at %p", fbdev->regs);
 486         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 487
 488
 489
 490         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 491         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 492                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 493
 494         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
 495                                         &fbdev->fb_phys, GFP_KERNEL);
 496         if (!fbdev->fb_mem) {
 497                 print_err("fail to allocate frambuffer (size: %dK))",
 498                           fbdev->fb_len / 1024);
 499                 return -ENOMEM;
 500         }
 501
 502         au1100fb_fix.smem_start = fbdev->fb_phys;
 503         au1100fb_fix.smem_len = fbdev->fb_len;
 504
 505         /*
 506          * Set page reserved so that mmap will work. This is necessary
 507          * since we'll be remapping normal memory.
 508          */
 509         for (page = (unsigned long)fbdev->fb_mem;
 510              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 511              page += PAGE_SIZE) {
 512 #if CONFIG_DMA_NONCOHERENT
 513                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
 514 #else
 515                 SetPageReserved(virt_to_page(page));
 516 #endif
 517         }
 518
 519         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 520         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 521
 522         /* Setup LCD clock to AUX (48 MHz) */
 523         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 524         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 525
 526         /* load the panel info into the var struct */
 527         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 528         au1100fb_var.xres = fbdev->panel->xres;
 529         au1100fb_var.xres_virtual = au1100fb_var.xres;
 530         au1100fb_var.yres = fbdev->panel->yres;
 531         au1100fb_var.yres_virtual = au1100fb_var.yres;
 532
 533         fbdev->info.screen_base = fbdev->fb_mem;
 534         fbdev->info.fbops = &au1100fb_ops;
 535         fbdev->info.fix = au1100fb_fix;
 536
 537         if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
 538                 return -ENOMEM;
 539         }
 540         memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
 541
 542         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 543                 print_err("Fail to allocate colormap (%d entries)",
 544                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 545                 kfree(fbdev->info.pseudo_palette);
 546                 return -EFAULT;
 547         }
 548
 549         fbdev->info.var = au1100fb_var;
 550
 551         /* Set h/w registers */
 552         au1100fb_setmode(fbdev);
 553
 554         /* Register new framebuffer */
 555         if (register_framebuffer(&fbdev->info) < 0) {
 556                 print_err("cannot register new framebuffer");
 557                 goto failed;
 558         }
 559
 560         return 0;
 561
 562 failed:
 563         if (fbdev->regs) {
 564                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 565         }
 566         if (fbdev->fb_mem) {
 567                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
 568         }
 569         if (fbdev->info.cmap.len != 0) {
 570                 fb_dealloc_cmap(&fbdev->info.cmap);
 571         }
 572         kfree(fbdev);
 573         dev_set_drvdata(dev, NULL);
 574
 575         return 0;
 576 }
 577
 578 int au1100fb_drv_remove(struct device *dev)
 579 {
 580         struct au1100fb_device *fbdev = NULL;
 581
 582         if (!dev)
 583                 return -ENODEV;
 584
 585         fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
 586
 587 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 588         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 589 #endif
 590         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 591
 592         /* Clean up all probe data */
 593         unregister_framebuffer(&fbdev->info);
 594
 595         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 596
 597         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
 598
 599         fb_dealloc_cmap(&fbdev->info.cmap);
 600         kfree(fbdev->info.pseudo_palette);
 601         kfree((void*)fbdev);
 602
 603         return 0;
 604 }
 605
 606 #ifdef CONFIG_PM
 607 static u32 sys_clksrc;
 608 static struct au1100fb_regs fbregs;
 609
 610 int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
 611 {
 612         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
 613
 614         if (!fbdev)
 615                 return 0;
 616
 617         /* Save the clock source state */
 618         sys_clksrc = au_readl(SYS_CLKSRC);
 619
 620         /* Blank the LCD */
 621         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 622
 623         /* Stop LCD clocking */
 624         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 625
 626         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 627
 628         return 0;
 629 }
 630
 631 int au1100fb_drv_resume(struct device *dev)
 632 {
 633         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
 634
 635         if (!fbdev)
 636                 return 0;
 637
 638         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 639
 640         /* Restart LCD clocking */
 641         au_writel(sys_clksrc, SYS_CLKSRC);
 642
 643         /* Unblank the LCD */
 644         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 645
 646         return 0;
 647 }
 648 #else
 649 #define au1100fb_drv_suspend NULL
 650 #define au1100fb_drv_resume NULL
 651 #endif
 652
 653 static struct device_driver au1100fb_driver = {
 654         .name           = "au1100-lcd",
 655         .bus            = &platform_bus_type,
 656
 657         .probe          = au1100fb_drv_probe,
 658         .remove         = au1100fb_drv_remove,
 659         .suspend        = au1100fb_drv_suspend,
 660         .resume         = au1100fb_drv_resume,
 661 };
 662
 663 /*-------------------------------------------------------------------------*/
 664
 665 /* Kernel driver */
 666
 667 int au1100fb_setup(char *options)
 668 {
 669         char* this_opt;
 670         int num_panels = ARRAY_SIZE(known_lcd_panels);
 671         char* mode = NULL;
 672         int panel_idx = 0;
 673
 674         if (num_panels <= 0) {
 675                 print_err("No LCD panels supported by driver!");
 676                 return -EFAULT;
 677                         }
 678
 679         if (options) {
 680                 while ((this_opt = strsep(&options,",")) != NULL) {
 681                         /* Panel option */
 682                 if (!strncmp(this_opt, "panel:", 6)) {
 683                                 int i;
 684                                 this_opt += 6;
 685                                 for (i = 0; i < num_panels; i++) {
 686                                         if (!strncmp(this_opt,
 687                                                      known_lcd_panels[i].name,
 688                                                         strlen(this_opt))) {
 689                                                 panel_idx = i;
 690                                         break;
 691                                 }
 692                         }
 693                                 if (i >= num_panels) {
 694                                         print_warn("Panel %s not supported!", this_opt);
 695                                 }
 696                         }
 697                         /* Mode option (only option that start with digit) */
 698                         else if (isdigit(this_opt[0])) {
 699                                 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
 700                                 strncpy(mode, this_opt, strlen(this_opt) + 1);
 701                         }
 702                         /* Unsupported option */
 703                         else {
 704                                 print_warn("Unsupported option \"%s\"", this_opt);
 705                 }
 706                 }
 707         }
 708
 709         drv_info.panel_idx = panel_idx;
 710         drv_info.opt_mode = mode;
 711
 712         print_info("Panel=%s Mode=%s",
 713                         known_lcd_panels[drv_info.panel_idx].name,
 714                         drv_info.opt_mode ? drv_info.opt_mode : "default");
 715
 716         return 0;
 717 }
 718
 719 int __init au1100fb_init(void)
 720 {
 721         char* options;
 722         int ret;
 723
 724         print_info("" DRIVER_DESC "");
 725
 726         memset(&drv_info, 0, sizeof(drv_info));
 727
 728         if (fb_get_options(DRIVER_NAME, &options))
 729                 return -ENODEV;
 730
 731         /* Setup driver with options */
 732         ret = au1100fb_setup(options);
 733         if (ret < 0) {
 734                 print_err("Fail to setup driver");
 735                 return ret;
 736         }
 737
 738         return driver_register(&au1100fb_driver);
 739 }
 740
 741 void __exit au1100fb_cleanup(void)
 742 {
 743         driver_unregister(&au1100fb_driver);
 744
 745         kfree(drv_info.opt_mode);
 746 }
 747
 748 module_init(au1100fb_init);
 749 module_exit(au1100fb_cleanup);
 750
 751 MODULE_DESCRIPTION(DRIVER_DESC);
 752 MODULE_LICENSE("GPL");