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0001 /*
0002  * BRIEF MODULE DESCRIPTION
0003  *  Au1100 LCD Driver.
0004  *
0005  * Rewritten for 2.6 by Embedded Alley Solutions
0006  *  <source@embeddedalley.com>, based on submissions by
0007  *      Karl Lessard <klessard@sunrisetelecom.com>
0008  *      <c.pellegrin@exadron.com>
0009  *
0010  * PM support added by Rodolfo Giometti <giometti@linux.it>
0011  * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
0012  *
0013  * Copyright 2002 MontaVista Software
0014  * Author: MontaVista Software, Inc.
0015  *      ppopov@mvista.com or source@mvista.com
0016  *
0017  * Copyright 2002 Alchemy Semiconductor
0018  * Author: Alchemy Semiconductor
0019  *
0020  * Based on:
0021  * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
0022  *  Created 28 Dec 1997 by Geert Uytterhoeven
0023  *
0024  *  This program is free software; you can redistribute  it and/or modify it
0025  *  under  the terms of  the GNU General  Public License as published by the
0026  *  Free Software Foundation;  either version 2 of the  License, or (at your
0027  *  option) any later version.
0028  *
0029  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
0030  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
0031  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
0032  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
0033  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
0034  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
0035  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
0036  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
0037  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
0038  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0039  *
0040  *  You should have received a copy of the  GNU General Public License along
0041  *  with this program; if not, write  to the Free Software Foundation, Inc.,
0042  *  675 Mass Ave, Cambridge, MA 02139, USA.
0043  */
0044 #include <linux/clk.h>
0045 #include <linux/module.h>
0046 #include <linux/kernel.h>
0047 #include <linux/errno.h>
0048 #include <linux/string.h>
0049 #include <linux/mm.h>
0050 #include <linux/fb.h>
0051 #include <linux/init.h>
0052 #include <linux/interrupt.h>
0053 #include <linux/ctype.h>
0054 #include <linux/dma-mapping.h>
0055 #include <linux/platform_device.h>
0056 #include <linux/slab.h>
0057 
0058 #include <asm/mach-au1x00/au1000.h>
0059 
0060 #define DEBUG 0
0061 
0062 #include "au1100fb.h"
0063 
0064 #define DRIVER_NAME "au1100fb"
0065 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
0066 
0067 #define to_au1100fb_device(_info) \
0068       (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
0069 
0070 /* Bitfields format supported by the controller. Note that the order of formats
0071  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
0072  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
0073  */
0074 struct fb_bitfield rgb_bitfields[][4] =
0075 {
0076     /*     Red,        Green,    Blue,       Transp   */
0077     { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
0078     { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
0079     { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
0080     { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
0081     { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
0082 
0083     /* The last is used to describe 12bpp format */
0084     { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
0085 };
0086 
0087 static struct fb_fix_screeninfo au1100fb_fix = {
0088     .id     = "AU1100 FB",
0089     .xpanstep   = 1,
0090     .ypanstep   = 1,
0091     .type       = FB_TYPE_PACKED_PIXELS,
0092     .accel      = FB_ACCEL_NONE,
0093 };
0094 
0095 static struct fb_var_screeninfo au1100fb_var = {
0096     .activate   = FB_ACTIVATE_NOW,
0097     .height     = -1,
0098     .width      = -1,
0099     .vmode      = FB_VMODE_NONINTERLACED,
0100 };
0101 
0102 /* fb_blank
0103  * Blank the screen. Depending on the mode, the screen will be
0104  * activated with the backlight color, or desactivated
0105  */
0106 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
0107 {
0108     struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
0109 
0110     print_dbg("fb_blank %d %p", blank_mode, fbi);
0111 
0112     switch (blank_mode) {
0113 
0114     case VESA_NO_BLANKING:
0115         /* Turn on panel */
0116         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
0117         wmb(); /* drain writebuffer */
0118         break;
0119 
0120     case VESA_VSYNC_SUSPEND:
0121     case VESA_HSYNC_SUSPEND:
0122     case VESA_POWERDOWN:
0123         /* Turn off panel */
0124         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
0125         wmb(); /* drain writebuffer */
0126         break;
0127     default:
0128         break;
0129 
0130     }
0131     return 0;
0132 }
0133 
0134 /*
0135  * Set hardware with var settings. This will enable the controller with a specific
0136  * mode, normally validated with the fb_check_var method
0137      */
0138 int au1100fb_setmode(struct au1100fb_device *fbdev)
0139 {
0140     struct fb_info *info = &fbdev->info;
0141     u32 words;
0142     int index;
0143 
0144     if (!fbdev)
0145         return -EINVAL;
0146 
0147     /* Update var-dependent FB info */
0148     if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
0149         if (info->var.bits_per_pixel <= 8) {
0150             /* palettized */
0151             info->var.red.offset    = 0;
0152             info->var.red.length    = info->var.bits_per_pixel;
0153             info->var.red.msb_right = 0;
0154 
0155             info->var.green.offset  = 0;
0156             info->var.green.length  = info->var.bits_per_pixel;
0157             info->var.green.msb_right = 0;
0158 
0159             info->var.blue.offset   = 0;
0160             info->var.blue.length   = info->var.bits_per_pixel;
0161             info->var.blue.msb_right = 0;
0162 
0163             info->var.transp.offset = 0;
0164             info->var.transp.length = 0;
0165             info->var.transp.msb_right = 0;
0166 
0167             info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
0168             info->fix.line_length = info->var.xres_virtual /
0169                             (8/info->var.bits_per_pixel);
0170         } else {
0171             /* non-palettized */
0172             index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
0173             info->var.red = rgb_bitfields[index][0];
0174             info->var.green = rgb_bitfields[index][1];
0175             info->var.blue = rgb_bitfields[index][2];
0176             info->var.transp = rgb_bitfields[index][3];
0177 
0178             info->fix.visual = FB_VISUAL_TRUECOLOR;
0179             info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
0180         }
0181     } else {
0182         /* mono */
0183         info->fix.visual = FB_VISUAL_MONO10;
0184         info->fix.line_length = info->var.xres_virtual / 8;
0185     }
0186 
0187     info->screen_size = info->fix.line_length * info->var.yres_virtual;
0188     info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
0189                 >> LCD_CONTROL_SM_BIT) * 90;
0190 
0191     /* Determine BPP mode and format */
0192     fbdev->regs->lcd_control = fbdev->panel->control_base;
0193     fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
0194     fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
0195     fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
0196     fbdev->regs->lcd_intenable = 0;
0197     fbdev->regs->lcd_intstatus = 0;
0198     fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
0199 
0200     if (panel_is_dual(fbdev->panel)) {
0201         /* Second panel display seconf half of screen if possible,
0202          * otherwise display the same as the first panel */
0203         if (info->var.yres_virtual >= (info->var.yres << 1)) {
0204             fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
0205                               (info->fix.line_length *
0206                                   (info->var.yres_virtual >> 1)));
0207         } else {
0208             fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
0209         }
0210     }
0211 
0212     words = info->fix.line_length / sizeof(u32);
0213     if (!info->var.rotate || (info->var.rotate == 180)) {
0214         words *= info->var.yres_virtual;
0215         if (info->var.rotate /* 180 */) {
0216             words -= (words % 8); /* should be divisable by 8 */
0217         }
0218     }
0219     fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
0220 
0221     fbdev->regs->lcd_pwmdiv = 0;
0222     fbdev->regs->lcd_pwmhi = 0;
0223 
0224     /* Resume controller */
0225     fbdev->regs->lcd_control |= LCD_CONTROL_GO;
0226     mdelay(10);
0227     au1100fb_fb_blank(VESA_NO_BLANKING, info);
0228 
0229     return 0;
0230 }
0231 
0232 /* fb_setcolreg
0233  * Set color in LCD palette.
0234  */
0235 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
0236 {
0237     struct au1100fb_device *fbdev;
0238     u32 *palette;
0239     u32 value;
0240 
0241     fbdev = to_au1100fb_device(fbi);
0242     palette = fbdev->regs->lcd_palettebase;
0243 
0244     if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
0245         return -EINVAL;
0246 
0247     if (fbi->var.grayscale) {
0248         /* Convert color to grayscale */
0249         red = green = blue =
0250             (19595 * red + 38470 * green + 7471 * blue) >> 16;
0251     }
0252 
0253     if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
0254         /* Place color in the pseudopalette */
0255         if (regno > 16)
0256             return -EINVAL;
0257 
0258         palette = (u32*)fbi->pseudo_palette;
0259 
0260         red   >>= (16 - fbi->var.red.length);
0261         green >>= (16 - fbi->var.green.length);
0262         blue  >>= (16 - fbi->var.blue.length);
0263 
0264         value = (red   << fbi->var.red.offset)  |
0265             (green << fbi->var.green.offset)|
0266             (blue  << fbi->var.blue.offset);
0267         value &= 0xFFFF;
0268 
0269     } else if (panel_is_active(fbdev->panel)) {
0270         /* COLOR TFT PALLETTIZED (use RGB 565) */
0271         value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
0272         value &= 0xFFFF;
0273 
0274     } else if (panel_is_color(fbdev->panel)) {
0275         /* COLOR STN MODE */
0276         value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
0277             ((green >> 8) & 0x00F0) |
0278             (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
0279         value &= 0xFFF;
0280     } else {
0281         /* MONOCHROME MODE */
0282         value = (green >> 12) & 0x000F;
0283         value &= 0xF;
0284     }
0285 
0286     palette[regno] = value;
0287 
0288     return 0;
0289 }
0290 
0291 /* fb_pan_display
0292  * Pan display in x and/or y as specified
0293  */
0294 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
0295 {
0296     struct au1100fb_device *fbdev;
0297     int dy;
0298 
0299     fbdev = to_au1100fb_device(fbi);
0300 
0301     print_dbg("fb_pan_display %p %p", var, fbi);
0302 
0303     if (!var || !fbdev) {
0304         return -EINVAL;
0305     }
0306 
0307     if (var->xoffset - fbi->var.xoffset) {
0308         /* No support for X panning for now! */
0309         return -EINVAL;
0310     }
0311 
0312     print_dbg("fb_pan_display 2 %p %p", var, fbi);
0313     dy = var->yoffset - fbi->var.yoffset;
0314     if (dy) {
0315 
0316         u32 dmaaddr;
0317 
0318         print_dbg("Panning screen of %d lines", dy);
0319 
0320         dmaaddr = fbdev->regs->lcd_dmaaddr0;
0321         dmaaddr += (fbi->fix.line_length * dy);
0322 
0323         /* TODO: Wait for current frame to finished */
0324         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
0325 
0326         if (panel_is_dual(fbdev->panel)) {
0327             dmaaddr = fbdev->regs->lcd_dmaaddr1;
0328             dmaaddr += (fbi->fix.line_length * dy);
0329             fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
0330     }
0331     }
0332     print_dbg("fb_pan_display 3 %p %p", var, fbi);
0333 
0334     return 0;
0335 }
0336 
0337 /* fb_mmap
0338  * Map video memory in user space. We don't use the generic fb_mmap method mainly
0339  * to allow the use of the TLB streaming flag (CCA=6)
0340  */
0341 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
0342 {
0343     struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
0344 
0345     pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
0346 
0347     return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys,
0348             fbdev->fb_len);
0349 }
0350 
0351 static const struct fb_ops au1100fb_ops =
0352 {
0353     .owner          = THIS_MODULE,
0354     .fb_setcolreg       = au1100fb_fb_setcolreg,
0355     .fb_blank       = au1100fb_fb_blank,
0356     .fb_pan_display     = au1100fb_fb_pan_display,
0357     .fb_fillrect        = cfb_fillrect,
0358     .fb_copyarea        = cfb_copyarea,
0359     .fb_imageblit       = cfb_imageblit,
0360     .fb_mmap        = au1100fb_fb_mmap,
0361 };
0362 
0363 
0364 /*-------------------------------------------------------------------------*/
0365 
0366 static int au1100fb_setup(struct au1100fb_device *fbdev)
0367 {
0368     char *this_opt, *options;
0369     int num_panels = ARRAY_SIZE(known_lcd_panels);
0370 
0371     if (num_panels <= 0) {
0372         print_err("No LCD panels supported by driver!");
0373         return -ENODEV;
0374     }
0375 
0376     if (fb_get_options(DRIVER_NAME, &options))
0377         return -ENODEV;
0378     if (!options)
0379         return -ENODEV;
0380 
0381     while ((this_opt = strsep(&options, ",")) != NULL) {
0382         /* Panel option */
0383         if (!strncmp(this_opt, "panel:", 6)) {
0384             int i;
0385             this_opt += 6;
0386             for (i = 0; i < num_panels; i++) {
0387                 if (!strncmp(this_opt, known_lcd_panels[i].name,
0388                          strlen(this_opt))) {
0389                     fbdev->panel = &known_lcd_panels[i];
0390                     fbdev->panel_idx = i;
0391                     break;
0392                 }
0393             }
0394             if (i >= num_panels) {
0395                 print_warn("Panel '%s' not supported!", this_opt);
0396                 return -ENODEV;
0397             }
0398         }
0399         /* Unsupported option */
0400         else
0401             print_warn("Unsupported option \"%s\"", this_opt);
0402     }
0403 
0404     print_info("Panel=%s", fbdev->panel->name);
0405 
0406     return 0;
0407 }
0408 
0409 static int au1100fb_drv_probe(struct platform_device *dev)
0410 {
0411     struct au1100fb_device *fbdev;
0412     struct resource *regs_res;
0413     struct clk *c;
0414 
0415     /* Allocate new device private */
0416     fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL);
0417     if (!fbdev)
0418         return -ENOMEM;
0419 
0420     if (au1100fb_setup(fbdev))
0421         goto failed;
0422 
0423     platform_set_drvdata(dev, (void *)fbdev);
0424     fbdev->dev = &dev->dev;
0425 
0426     /* Allocate region for our registers and map them */
0427     regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
0428     if (!regs_res) {
0429         print_err("fail to retrieve registers resource");
0430         return -EFAULT;
0431     }
0432 
0433     au1100fb_fix.mmio_start = regs_res->start;
0434     au1100fb_fix.mmio_len = resource_size(regs_res);
0435 
0436     if (!devm_request_mem_region(&dev->dev,
0437                      au1100fb_fix.mmio_start,
0438                      au1100fb_fix.mmio_len,
0439                      DRIVER_NAME)) {
0440         print_err("fail to lock memory region at 0x%08lx",
0441                 au1100fb_fix.mmio_start);
0442         return -EBUSY;
0443     }
0444 
0445     fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
0446 
0447     print_dbg("Register memory map at %p", fbdev->regs);
0448     print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
0449 
0450     c = clk_get(NULL, "lcd_intclk");
0451     if (!IS_ERR(c)) {
0452         fbdev->lcdclk = c;
0453         clk_set_rate(c, 48000000);
0454         clk_prepare_enable(c);
0455     }
0456 
0457     /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
0458     fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
0459             (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
0460 
0461     fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
0462                         PAGE_ALIGN(fbdev->fb_len),
0463                         &fbdev->fb_phys, GFP_KERNEL);
0464     if (!fbdev->fb_mem) {
0465         print_err("fail to allocate framebuffer (size: %dK))",
0466               fbdev->fb_len / 1024);
0467         return -ENOMEM;
0468     }
0469 
0470     au1100fb_fix.smem_start = fbdev->fb_phys;
0471     au1100fb_fix.smem_len = fbdev->fb_len;
0472 
0473     print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
0474     print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
0475 
0476     /* load the panel info into the var struct */
0477     au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
0478     au1100fb_var.xres = fbdev->panel->xres;
0479     au1100fb_var.xres_virtual = au1100fb_var.xres;
0480     au1100fb_var.yres = fbdev->panel->yres;
0481     au1100fb_var.yres_virtual = au1100fb_var.yres;
0482 
0483     fbdev->info.screen_base = fbdev->fb_mem;
0484     fbdev->info.fbops = &au1100fb_ops;
0485     fbdev->info.fix = au1100fb_fix;
0486 
0487     fbdev->info.pseudo_palette =
0488         devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL);
0489     if (!fbdev->info.pseudo_palette)
0490         return -ENOMEM;
0491 
0492     if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
0493         print_err("Fail to allocate colormap (%d entries)",
0494                AU1100_LCD_NBR_PALETTE_ENTRIES);
0495         return -EFAULT;
0496     }
0497 
0498     fbdev->info.var = au1100fb_var;
0499 
0500     /* Set h/w registers */
0501     au1100fb_setmode(fbdev);
0502 
0503     /* Register new framebuffer */
0504     if (register_framebuffer(&fbdev->info) < 0) {
0505         print_err("cannot register new framebuffer");
0506         goto failed;
0507     }
0508 
0509     return 0;
0510 
0511 failed:
0512     if (fbdev->lcdclk) {
0513         clk_disable_unprepare(fbdev->lcdclk);
0514         clk_put(fbdev->lcdclk);
0515     }
0516     if (fbdev->info.cmap.len != 0) {
0517         fb_dealloc_cmap(&fbdev->info.cmap);
0518     }
0519 
0520     return -ENODEV;
0521 }
0522 
0523 int au1100fb_drv_remove(struct platform_device *dev)
0524 {
0525     struct au1100fb_device *fbdev = NULL;
0526 
0527     if (!dev)
0528         return -ENODEV;
0529 
0530     fbdev = platform_get_drvdata(dev);
0531 
0532 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
0533     au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
0534 #endif
0535     fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
0536 
0537     /* Clean up all probe data */
0538     unregister_framebuffer(&fbdev->info);
0539 
0540     fb_dealloc_cmap(&fbdev->info.cmap);
0541 
0542     if (fbdev->lcdclk) {
0543         clk_disable_unprepare(fbdev->lcdclk);
0544         clk_put(fbdev->lcdclk);
0545     }
0546 
0547     return 0;
0548 }
0549 
0550 #ifdef CONFIG_PM
0551 static struct au1100fb_regs fbregs;
0552 
0553 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
0554 {
0555     struct au1100fb_device *fbdev = platform_get_drvdata(dev);
0556 
0557     if (!fbdev)
0558         return 0;
0559 
0560     /* Blank the LCD */
0561     au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
0562 
0563     clk_disable(fbdev->lcdclk);
0564 
0565     memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
0566 
0567     return 0;
0568 }
0569 
0570 int au1100fb_drv_resume(struct platform_device *dev)
0571 {
0572     struct au1100fb_device *fbdev = platform_get_drvdata(dev);
0573 
0574     if (!fbdev)
0575         return 0;
0576 
0577     memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
0578 
0579     clk_enable(fbdev->lcdclk);
0580 
0581     /* Unblank the LCD */
0582     au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
0583 
0584     return 0;
0585 }
0586 #else
0587 #define au1100fb_drv_suspend NULL
0588 #define au1100fb_drv_resume NULL
0589 #endif
0590 
0591 static struct platform_driver au1100fb_driver = {
0592     .driver = {
0593         .name       = "au1100-lcd",
0594     },
0595     .probe      = au1100fb_drv_probe,
0596         .remove     = au1100fb_drv_remove,
0597     .suspend    = au1100fb_drv_suspend,
0598         .resume     = au1100fb_drv_resume,
0599 };
0600 module_platform_driver(au1100fb_driver);
0601 
0602 MODULE_DESCRIPTION(DRIVER_DESC);
0603 MODULE_LICENSE("GPL");
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