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#define DRIVER_NAME "au1100fb"
  64#define DRIVER_DESC "LCD controller driver for AU1100 processors"
  65
  66#define to_au1100fb_device(_info) \
  67          (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
  68
  69/* Bitfields format supported by the controller. Note that the order of formats
  70 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
  71 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
  72 */
  73struct fb_bitfield rgb_bitfields[][4] =
  74{
  75        /*     Red,        Green,        Blue,       Transp   */
  76        { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  77        { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  78        { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
  79        { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
  80        { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
  81
  82        /* The last is used to describe 12bpp format */
  83        { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
  84};
  85
  86static struct fb_fix_screeninfo au1100fb_fix __devinitdata = {
  87        .id             = "AU1100 FB",
  88        .xpanstep       = 1,
  89        .ypanstep       = 1,
  90        .type           = FB_TYPE_PACKED_PIXELS,
  91        .accel          = FB_ACCEL_NONE,
  92};
  93
  94static struct fb_var_screeninfo au1100fb_var __devinitdata = {
  95        .activate       = FB_ACTIVATE_NOW,
  96        .height         = -1,
  97        .width          = -1,
  98        .vmode          = FB_VMODE_NONINTERLACED,
  99};
 100
 101/* fb_blank
 102 * Blank the screen. Depending on the mode, the screen will be
 103 * activated with the backlight color, or desactivated
 104 */
 105static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 106{
 107        struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 108
 109        print_dbg("fb_blank %d %p", blank_mode, fbi);
 110
 111        switch (blank_mode) {
 112
 113        case VESA_NO_BLANKING:
 114                        /* Turn on panel */
 115                        fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 116#ifdef CONFIG_MIPS_PB1100
 117                        if (fbdev->panel_idx == 1) {
 118                                au_writew(au_readw(PB1100_G_CONTROL)
 119                                          | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 120                        PB1100_G_CONTROL);
 121                        }
 122#endif
 123                au_sync();
 124                break;
 125
 126        case VESA_VSYNC_SUSPEND:
 127        case VESA_HSYNC_SUSPEND:
 128        case VESA_POWERDOWN:
 129                        /* Turn off panel */
 130                        fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 131#ifdef CONFIG_MIPS_PB1100
 132                        if (fbdev->panel_idx == 1) {
 133                                au_writew(au_readw(PB1100_G_CONTROL)
 134                                          & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 135                        PB1100_G_CONTROL);
 136                        }
 137#endif
 138                au_sync();
 139                break;
 140        default:
 141                break;
 142
 143        }
 144        return 0;
 145}
 146
 147/*
 148 * Set hardware with var settings. This will enable the controller with a specific
 149 * mode, normally validated with the fb_check_var method
 150         */
 151int au1100fb_setmode(struct au1100fb_device *fbdev)
 152{
 153        struct fb_info *info = &fbdev->info;
 154        u32 words;
 155        int index;
 156
 157        if (!fbdev)
 158                return -EINVAL;
 159
 160        /* Update var-dependent FB info */
 161        if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 162                if (info->var.bits_per_pixel <= 8) {
 163                        /* palettized */
 164                        info->var.red.offset    = 0;
 165                        info->var.red.length    = info->var.bits_per_pixel;
 166                        info->var.red.msb_right = 0;
 167
 168                        info->var.green.offset  = 0;
 169                        info->var.green.length  = info->var.bits_per_pixel;
 170                        info->var.green.msb_right = 0;
 171
 172                        info->var.blue.offset   = 0;
 173                        info->var.blue.length   = info->var.bits_per_pixel;
 174                        info->var.blue.msb_right = 0;
 175
 176                        info->var.transp.offset = 0;
 177                        info->var.transp.length = 0;
 178                        info->var.transp.msb_right = 0;
 179
 180                        info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 181                        info->fix.line_length = info->var.xres_virtual /
 182                                                        (8/info->var.bits_per_pixel);
 183                } else {
 184                        /* non-palettized */
 185                        index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 186                        info->var.red = rgb_bitfields[index][0];
 187                        info->var.green = rgb_bitfields[index][1];
 188                        info->var.blue = rgb_bitfields[index][2];
 189                        info->var.transp = rgb_bitfields[index][3];
 190
 191                        info->fix.visual = FB_VISUAL_TRUECOLOR;
 192                        info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 193                }
 194        } else {
 195                /* mono */
 196                info->fix.visual = FB_VISUAL_MONO10;
 197                info->fix.line_length = info->var.xres_virtual / 8;
 198        }
 199
 200        info->screen_size = info->fix.line_length * info->var.yres_virtual;
 201        info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
 202                                >> LCD_CONTROL_SM_BIT) * 90;
 203
 204        /* Determine BPP mode and format */
 205        fbdev->regs->lcd_control = fbdev->panel->control_base;
 206        fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 207        fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 208        fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 209        fbdev->regs->lcd_intenable = 0;
 210        fbdev->regs->lcd_intstatus = 0;
 211        fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 212
 213        if (panel_is_dual(fbdev->panel)) {
 214                /* Second panel display seconf half of screen if possible,
 215                 * otherwise display the same as the first panel */
 216                if (info->var.yres_virtual >= (info->var.yres << 1)) {
 217                        fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 218                                                          (info->fix.line_length *
 219                                                          (info->var.yres_virtual >> 1)));
 220                } else {
 221                        fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 222                }
 223        }
 224
 225        words = info->fix.line_length / sizeof(u32);
 226        if (!info->var.rotate || (info->var.rotate == 180)) {
 227                words *= info->var.yres_virtual;
 228                if (info->var.rotate /* 180 */) {
 229                        words -= (words % 8); /* should be divisable by 8 */
 230                }
 231        }
 232        fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 233
 234        fbdev->regs->lcd_pwmdiv = 0;
 235        fbdev->regs->lcd_pwmhi = 0;
 236
 237        /* Resume controller */
 238        fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 239        mdelay(10);
 240        au1100fb_fb_blank(VESA_NO_BLANKING, info);
 241
 242        return 0;
 243}
 244
 245/* fb_setcolreg
 246 * Set color in LCD palette.
 247 */
 248int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 249{
 250        struct au1100fb_device *fbdev;
 251        u32 *palette;
 252        u32 value;
 253
 254        fbdev = to_au1100fb_device(fbi);
 255        palette = fbdev->regs->lcd_pallettebase;
 256
 257        if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 258                return -EINVAL;
 259
 260        if (fbi->var.grayscale) {
 261                /* Convert color to grayscale */
 262                red = green = blue =
 263                        (19595 * red + 38470 * green + 7471 * blue) >> 16;
 264        }
 265
 266        if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 267                /* Place color in the pseudopalette */
 268                if (regno > 16)
 269                        return -EINVAL;
 270
 271                palette = (u32*)fbi->pseudo_palette;
 272
 273                red   >>= (16 - fbi->var.red.length);
 274                green >>= (16 - fbi->var.green.length);
 275                blue  >>= (16 - fbi->var.blue.length);
 276
 277                value = (red   << fbi->var.red.offset)  |
 278                        (green << fbi->var.green.offset)|
 279                        (blue  << fbi->var.blue.offset);
 280                value &= 0xFFFF;
 281
 282        } else if (panel_is_active(fbdev->panel)) {
 283                /* COLOR TFT PALLETTIZED (use RGB 565) */
 284                value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 285                value &= 0xFFFF;
 286
 287        } else if (panel_is_color(fbdev->panel)) {
 288                /* COLOR STN MODE */
 289                value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 290                        ((green >> 8) & 0x00F0) |
 291                        (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 292                value &= 0xFFF;
 293        } else {
 294                /* MONOCHROME MODE */
 295                value = (green >> 12) & 0x000F;
 296                value &= 0xF;
 297        }
 298
 299        palette[regno] = value;
 300
 301        return 0;
 302}
 303
 304/* fb_pan_display
 305 * Pan display in x and/or y as specified
 306 */
 307int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 308{
 309        struct au1100fb_device *fbdev;
 310        int dy;
 311
 312        fbdev = to_au1100fb_device(fbi);
 313
 314        print_dbg("fb_pan_display %p %p", var, fbi);
 315
 316        if (!var || !fbdev) {
 317                return -EINVAL;
 318        }
 319
 320        if (var->xoffset - fbi->var.xoffset) {
 321                /* No support for X panning for now! */
 322                return -EINVAL;
 323        }
 324
 325        print_dbg("fb_pan_display 2 %p %p", var, fbi);
 326        dy = var->yoffset - fbi->var.yoffset;
 327        if (dy) {
 328
 329                u32 dmaaddr;
 330
 331                print_dbg("Panning screen of %d lines", dy);
 332
 333                dmaaddr = fbdev->regs->lcd_dmaaddr0;
 334                dmaaddr += (fbi->fix.line_length * dy);
 335
 336                /* TODO: Wait for current frame to finished */
 337                fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 338
 339                if (panel_is_dual(fbdev->panel)) {
 340                        dmaaddr = fbdev->regs->lcd_dmaaddr1;
 341                        dmaaddr += (fbi->fix.line_length * dy);
 342                        fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 343        }
 344        }
 345        print_dbg("fb_pan_display 3 %p %p", var, fbi);
 346
 347        return 0;
 348}
 349
 350/* fb_rotate
 351 * Rotate the display of this angle. This doesn't seems to be used by the core,
 352 * but as our hardware supports it, so why not implementing it...
 353 */
 354void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 355{
 356        struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 357
 358        print_dbg("fb_rotate %p %d", fbi, angle);
 359
 360        if (fbdev && (angle > 0) && !(angle % 90)) {
 361
 362                fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 363
 364                fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 365                fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 366
 367                fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 368        }
 369}
 370
 371/* fb_mmap
 372 * Map video memory in user space. We don't use the generic fb_mmap method mainly
 373 * to allow the use of the TLB streaming flag (CCA=6)
 374 */
 375int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 376{
 377        struct au1100fb_device *fbdev;
 378        unsigned int len;
 379        unsigned long start=0, off;
 380
 381        fbdev = to_au1100fb_device(fbi);
 382
 383        if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 384                return -EINVAL;
 385        }
 386
 387        start = fbdev->fb_phys & PAGE_MASK;
 388        len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 389
 390        off = vma->vm_pgoff << PAGE_SHIFT;
 391
 392        if ((vma->vm_end - vma->vm_start + off) > len) {
 393                return -EINVAL;
 394        }
 395
 396        off += start;
 397        vma->vm_pgoff = off >> PAGE_SHIFT;
 398
 399        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 400        pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 401
 402        vma->vm_flags |= VM_IO;
 403
 404        if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 405                                vma->vm_end - vma->vm_start,
 406                                vma->vm_page_prot)) {
 407                return -EAGAIN;
 408        }
 409
 410        return 0;
 411}
 412
 413static struct fb_ops au1100fb_ops =
 414{
 415        .owner                  = THIS_MODULE,
 416        .fb_setcolreg           = au1100fb_fb_setcolreg,
 417        .fb_blank               = au1100fb_fb_blank,
 418        .fb_pan_display         = au1100fb_fb_pan_display,
 419        .fb_fillrect            = cfb_fillrect,
 420        .fb_copyarea            = cfb_copyarea,
 421        .fb_imageblit           = cfb_imageblit,
 422        .fb_rotate              = au1100fb_fb_rotate,
 423        .fb_mmap                = au1100fb_fb_mmap,
 424};
 425
 426
 427/*-------------------------------------------------------------------------*/
 428
 429static int au1100fb_setup(struct au1100fb_device *fbdev)
 430{
 431        char *this_opt, *options;
 432        int num_panels = ARRAY_SIZE(known_lcd_panels);
 433
 434        if (num_panels <= 0) {
 435                print_err("No LCD panels supported by driver!");
 436                return -ENODEV;
 437        }
 438
 439        if (fb_get_options(DRIVER_NAME, &options))
 440                return -ENODEV;
 441        if (!options)
 442                return -ENODEV;
 443
 444        while ((this_opt = strsep(&options, ",")) != NULL) {
 445                /* Panel option */
 446                if (!strncmp(this_opt, "panel:", 6)) {
 447                        int i;
 448                        this_opt += 6;
 449                        for (i = 0; i < num_panels; i++) {
 450                                if (!strncmp(this_opt, known_lcd_panels[i].name,
 451                                             strlen(this_opt))) {
 452                                        fbdev->panel = &known_lcd_panels[i];
 453                                        fbdev->panel_idx = i;
 454                                        break;
 455                                }
 456                        }
 457                        if (i >= num_panels) {
 458                                print_warn("Panel '%s' not supported!", this_opt);
 459                                return -ENODEV;
 460                        }
 461                }
 462                /* Unsupported option */
 463                else
 464                        print_warn("Unsupported option \"%s\"", this_opt);
 465        }
 466
 467        print_info("Panel=%s", fbdev->panel->name);
 468
 469        return 0;
 470}
 471
 472static int __devinit au1100fb_drv_probe(struct platform_device *dev)
 473{
 474        struct au1100fb_device *fbdev = NULL;
 475        struct resource *regs_res;
 476        unsigned long page;
 477        u32 sys_clksrc;
 478
 479        /* Allocate new device private */
 480        fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
 481                             GFP_KERNEL);
 482        if (!fbdev) {
 483                print_err("fail to allocate device private record");
 484                return -ENOMEM;
 485        }
 486
 487        if (au1100fb_setup(fbdev))
 488                goto failed;
 489
 490        platform_set_drvdata(dev, (void *)fbdev);
 491
 492        /* Allocate region for our registers and map them */
 493        regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 494        if (!regs_res) {
 495                print_err("fail to retrieve registers resource");
 496                return -EFAULT;
 497        }
 498
 499        au1100fb_fix.mmio_start = regs_res->start;
 500        au1100fb_fix.mmio_len = resource_size(regs_res);
 501
 502        if (!devm_request_mem_region(&dev->dev,
 503                                     au1100fb_fix.mmio_start,
 504                                     au1100fb_fix.mmio_len,
 505                                     DRIVER_NAME)) {
 506                print_err("fail to lock memory region at 0x%08lx",
 507                                au1100fb_fix.mmio_start);
 508                return -EBUSY;
 509        }
 510
 511        fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 512
 513        print_dbg("Register memory map at %p", fbdev->regs);
 514        print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 515
 516        /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 517        fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 518                        (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 519
 520        fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
 521                                            PAGE_ALIGN(fbdev->fb_len),
 522                                            &fbdev->fb_phys, GFP_KERNEL);
 523        if (!fbdev->fb_mem) {
 524                print_err("fail to allocate frambuffer (size: %dK))",
 525                          fbdev->fb_len / 1024);
 526                return -ENOMEM;
 527        }
 528
 529        au1100fb_fix.smem_start = fbdev->fb_phys;
 530        au1100fb_fix.smem_len = fbdev->fb_len;
 531
 532        /*
 533         * Set page reserved so that mmap will work. This is necessary
 534         * since we'll be remapping normal memory.
 535         */
 536        for (page = (unsigned long)fbdev->fb_mem;
 537             page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 538             page += PAGE_SIZE) {
 539#ifdef CONFIG_DMA_NONCOHERENT
 540                SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
 541#else
 542                SetPageReserved(virt_to_page(page));
 543#endif
 544        }
 545
 546        print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 547        print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 548
 549        /* Setup LCD clock to AUX (48 MHz) */
 550        sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 551        au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 552
 553        /* load the panel info into the var struct */
 554        au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 555        au1100fb_var.xres = fbdev->panel->xres;
 556        au1100fb_var.xres_virtual = au1100fb_var.xres;
 557        au1100fb_var.yres = fbdev->panel->yres;
 558        au1100fb_var.yres_virtual = au1100fb_var.yres;
 559
 560        fbdev->info.screen_base = fbdev->fb_mem;
 561        fbdev->info.fbops = &au1100fb_ops;
 562        fbdev->info.fix = au1100fb_fix;
 563
 564        fbdev->info.pseudo_palette =
 565                devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
 566        if (!fbdev->info.pseudo_palette)
 567                return -ENOMEM;
 568
 569        if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 570                print_err("Fail to allocate colormap (%d entries)",
 571                           AU1100_LCD_NBR_PALETTE_ENTRIES);
 572                return -EFAULT;
 573        }
 574
 575        fbdev->info.var = au1100fb_var;
 576
 577        /* Set h/w registers */
 578        au1100fb_setmode(fbdev);
 579
 580        /* Register new framebuffer */
 581        if (register_framebuffer(&fbdev->info) < 0) {
 582                print_err("cannot register new framebuffer");
 583                goto failed;
 584        }
 585
 586        return 0;
 587
 588failed:
 589        if (fbdev->fb_mem) {
 590                dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
 591                                     fbdev->fb_phys);
 592        }
 593        if (fbdev->info.cmap.len != 0) {
 594                fb_dealloc_cmap(&fbdev->info.cmap);
 595        }
 596        platform_set_drvdata(dev, NULL);
 597
 598        return -ENODEV;
 599}
 600
 601int au1100fb_drv_remove(struct platform_device *dev)
 602{
 603        struct au1100fb_device *fbdev = NULL;
 604
 605        if (!dev)
 606                return -ENODEV;
 607
 608        fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
 609
 610#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 611        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 612#endif
 613        fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 614
 615        /* Clean up all probe data */
 616        unregister_framebuffer(&fbdev->info);
 617
 618        fb_dealloc_cmap(&fbdev->info.cmap);
 619
 620        return 0;
 621}
 622
 623#ifdef CONFIG_PM
 624static u32 sys_clksrc;
 625static struct au1100fb_regs fbregs;
 626
 627int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 628{
 629        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 630
 631        if (!fbdev)
 632                return 0;
 633
 634        /* Save the clock source state */
 635        sys_clksrc = au_readl(SYS_CLKSRC);
 636
 637        /* Blank the LCD */
 638        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 639
 640        /* Stop LCD clocking */
 641        au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 642
 643        memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 644
 645        return 0;
 646}
 647
 648int au1100fb_drv_resume(struct platform_device *dev)
 649{
 650        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 651
 652        if (!fbdev)
 653                return 0;
 654
 655        memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 656
 657        /* Restart LCD clocking */
 658        au_writel(sys_clksrc, SYS_CLKSRC);
 659
 660        /* Unblank the LCD */
 661        au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 662
 663        return 0;
 664}
 665#else
 666#define au1100fb_drv_suspend NULL
 667#define au1100fb_drv_resume NULL
 668#endif
 669
 670static struct platform_driver au1100fb_driver = {
 671        .driver = {
 672                .name           = "au1100-lcd",
 673                .owner          = THIS_MODULE,
 674        },
 675        .probe          = au1100fb_drv_probe,
 676        .remove         = au1100fb_drv_remove,
 677        .suspend        = au1100fb_drv_suspend,
 678        .resume         = au1100fb_drv_resume,
 679};
 680
 681static int __init au1100fb_load(void)
 682{
 683        return platform_driver_register(&au1100fb_driver);
 684}
 685
 686static void __exit au1100fb_unload(void)
 687{
 688        platform_driver_unregister(&au1100fb_driver);
 689}
 690
 691module_init(au1100fb_load);
 692module_exit(au1100fb_unload);
 693
 694MODULE_DESCRIPTION(DRIVER_DESC);
 695MODULE_LICENSE("GPL");
 696