LXR linux/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 */
  85struct 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
  98static 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
 106static 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
 113static struct au1100fb_drv_info drv_info;
 114
 115static int nocursor = 0;
 116module_param(nocursor, int, 0644);
 117MODULE_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 */
 123static 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         */
 169int 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 */
 266int 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 */
 325int 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 */
 372void 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 */
 393int 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 */
 434int 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
 442static 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
 461static 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 = regs_res->end - regs_res->start + 1;
 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
 576failed:
 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
 592int 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
 621static u32 sys_clksrc;
 622static struct au1100fb_regs fbregs;
 623
 624int 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
 645int 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
 667static 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
 682int 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
 742int __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
 764void __exit au1100fb_cleanup(void)
 765{
 766        platform_driver_unregister(&au1100fb_driver);
 767
 768        kfree(drv_info.opt_mode);
 769}
 770
 771module_init(au1100fb_init);
 772module_exit(au1100fb_cleanup);
 773
 774MODULE_DESCRIPTION(DRIVER_DESC);
 775MODULE_LICENSE("GPL");
 776