| /* |
| * BRIEF MODULE DESCRIPTION |
| * Au1100 LCD Driver. |
| * |
| * Rewritten for 2.6 by Embedded Alley Solutions |
| * <source@embeddedalley.com>, based on submissions by |
| * Karl Lessard <klessard@sunrisetelecom.com> |
| * <c.pellegrin@exadron.com> |
| * |
| * PM support added by Rodolfo Giometti <giometti@linux.it> |
| * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it> |
| * |
| * Copyright 2002 MontaVista Software |
| * Author: MontaVista Software, Inc. |
| * ppopov@mvista.com or source@mvista.com |
| * |
| * Copyright 2002 Alchemy Semiconductor |
| * Author: Alchemy Semiconductor |
| * |
| * Based on: |
| * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device |
| * Created 28 Dec 1997 by Geert Uytterhoeven |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/mm.h> |
| #include <linux/fb.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/ctype.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| |
| #include <asm/mach-au1x00/au1000.h> |
| |
| #define DEBUG 0 |
| |
| #include "au1100fb.h" |
| |
| #define DRIVER_NAME "au1100fb" |
| #define DRIVER_DESC "LCD controller driver for AU1100 processors" |
| |
| #define to_au1100fb_device(_info) \ |
| (_info ? container_of(_info, struct au1100fb_device, info) : NULL); |
| |
| /* Bitfields format supported by the controller. Note that the order of formats |
| * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the |
| * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF] |
| */ |
| struct fb_bitfield rgb_bitfields[][4] = |
| { |
| /* Red, Green, Blue, Transp */ |
| { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, |
| { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, |
| { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } }, |
| { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } }, |
| { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } }, |
| |
| /* The last is used to describe 12bpp format */ |
| { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } }, |
| }; |
| |
| static struct fb_fix_screeninfo au1100fb_fix = { |
| .id = "AU1100 FB", |
| .xpanstep = 1, |
| .ypanstep = 1, |
| .type = FB_TYPE_PACKED_PIXELS, |
| .accel = FB_ACCEL_NONE, |
| }; |
| |
| static struct fb_var_screeninfo au1100fb_var = { |
| .activate = FB_ACTIVATE_NOW, |
| .height = -1, |
| .width = -1, |
| .vmode = FB_VMODE_NONINTERLACED, |
| }; |
| |
| /* fb_blank |
| * Blank the screen. Depending on the mode, the screen will be |
| * activated with the backlight color, or desactivated |
| */ |
| static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi) |
| { |
| struct au1100fb_device *fbdev = to_au1100fb_device(fbi); |
| |
| print_dbg("fb_blank %d %p", blank_mode, fbi); |
| |
| switch (blank_mode) { |
| |
| case VESA_NO_BLANKING: |
| /* Turn on panel */ |
| fbdev->regs->lcd_control |= LCD_CONTROL_GO; |
| wmb(); /* drain writebuffer */ |
| break; |
| |
| case VESA_VSYNC_SUSPEND: |
| case VESA_HSYNC_SUSPEND: |
| case VESA_POWERDOWN: |
| /* Turn off panel */ |
| fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; |
| wmb(); /* drain writebuffer */ |
| break; |
| default: |
| break; |
| |
| } |
| return 0; |
| } |
| |
| /* |
| * Set hardware with var settings. This will enable the controller with a specific |
| * mode, normally validated with the fb_check_var method |
| */ |
| int au1100fb_setmode(struct au1100fb_device *fbdev) |
| { |
| struct fb_info *info = &fbdev->info; |
| u32 words; |
| int index; |
| |
| if (!fbdev) |
| return -EINVAL; |
| |
| /* Update var-dependent FB info */ |
| if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) { |
| if (info->var.bits_per_pixel <= 8) { |
| /* palettized */ |
| info->var.red.offset = 0; |
| info->var.red.length = info->var.bits_per_pixel; |
| info->var.red.msb_right = 0; |
| |
| info->var.green.offset = 0; |
| info->var.green.length = info->var.bits_per_pixel; |
| info->var.green.msb_right = 0; |
| |
| info->var.blue.offset = 0; |
| info->var.blue.length = info->var.bits_per_pixel; |
| info->var.blue.msb_right = 0; |
| |
| info->var.transp.offset = 0; |
| info->var.transp.length = 0; |
| info->var.transp.msb_right = 0; |
| |
| info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
| info->fix.line_length = info->var.xres_virtual / |
| (8/info->var.bits_per_pixel); |
| } else { |
| /* non-palettized */ |
| index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT; |
| info->var.red = rgb_bitfields[index][0]; |
| info->var.green = rgb_bitfields[index][1]; |
| info->var.blue = rgb_bitfields[index][2]; |
| info->var.transp = rgb_bitfields[index][3]; |
| |
| info->fix.visual = FB_VISUAL_TRUECOLOR; |
| info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */ |
| } |
| } else { |
| /* mono */ |
| info->fix.visual = FB_VISUAL_MONO10; |
| info->fix.line_length = info->var.xres_virtual / 8; |
| } |
| |
| info->screen_size = info->fix.line_length * info->var.yres_virtual; |
| info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \ |
| >> LCD_CONTROL_SM_BIT) * 90; |
| |
| /* Determine BPP mode and format */ |
| fbdev->regs->lcd_control = fbdev->panel->control_base; |
| fbdev->regs->lcd_horztiming = fbdev->panel->horztiming; |
| fbdev->regs->lcd_verttiming = fbdev->panel->verttiming; |
| fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base; |
| fbdev->regs->lcd_intenable = 0; |
| fbdev->regs->lcd_intstatus = 0; |
| fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys); |
| |
| if (panel_is_dual(fbdev->panel)) { |
| /* Second panel display seconf half of screen if possible, |
| * otherwise display the same as the first panel */ |
| if (info->var.yres_virtual >= (info->var.yres << 1)) { |
| fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys + |
| (info->fix.line_length * |
| (info->var.yres_virtual >> 1))); |
| } else { |
| fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys); |
| } |
| } |
| |
| words = info->fix.line_length / sizeof(u32); |
| if (!info->var.rotate || (info->var.rotate == 180)) { |
| words *= info->var.yres_virtual; |
| if (info->var.rotate /* 180 */) { |
| words -= (words % 8); /* should be divisable by 8 */ |
| } |
| } |
| fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words); |
| |
| fbdev->regs->lcd_pwmdiv = 0; |
| fbdev->regs->lcd_pwmhi = 0; |
| |
| /* Resume controller */ |
| fbdev->regs->lcd_control |= LCD_CONTROL_GO; |
| mdelay(10); |
| au1100fb_fb_blank(VESA_NO_BLANKING, info); |
| |
| return 0; |
| } |
| |
| /* fb_setcolreg |
| * Set color in LCD palette. |
| */ |
| int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi) |
| { |
| struct au1100fb_device *fbdev; |
| u32 *palette; |
| u32 value; |
| |
| fbdev = to_au1100fb_device(fbi); |
| palette = fbdev->regs->lcd_pallettebase; |
| |
| if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1)) |
| return -EINVAL; |
| |
| if (fbi->var.grayscale) { |
| /* Convert color to grayscale */ |
| red = green = blue = |
| (19595 * red + 38470 * green + 7471 * blue) >> 16; |
| } |
| |
| if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) { |
| /* Place color in the pseudopalette */ |
| if (regno > 16) |
| return -EINVAL; |
| |
| palette = (u32*)fbi->pseudo_palette; |
| |
| red >>= (16 - fbi->var.red.length); |
| green >>= (16 - fbi->var.green.length); |
| blue >>= (16 - fbi->var.blue.length); |
| |
| value = (red << fbi->var.red.offset) | |
| (green << fbi->var.green.offset)| |
| (blue << fbi->var.blue.offset); |
| value &= 0xFFFF; |
| |
| } else if (panel_is_active(fbdev->panel)) { |
| /* COLOR TFT PALLETTIZED (use RGB 565) */ |
| value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F); |
| value &= 0xFFFF; |
| |
| } else if (panel_is_color(fbdev->panel)) { |
| /* COLOR STN MODE */ |
| value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) | |
| ((green >> 8) & 0x00F0) | |
| (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00); |
| value &= 0xFFF; |
| } else { |
| /* MONOCHROME MODE */ |
| value = (green >> 12) & 0x000F; |
| value &= 0xF; |
| } |
| |
| palette[regno] = value; |
| |
| return 0; |
| } |
| |
| /* fb_pan_display |
| * Pan display in x and/or y as specified |
| */ |
| int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi) |
| { |
| struct au1100fb_device *fbdev; |
| int dy; |
| |
| fbdev = to_au1100fb_device(fbi); |
| |
| print_dbg("fb_pan_display %p %p", var, fbi); |
| |
| if (!var || !fbdev) { |
| return -EINVAL; |
| } |
| |
| if (var->xoffset - fbi->var.xoffset) { |
| /* No support for X panning for now! */ |
| return -EINVAL; |
| } |
| |
| print_dbg("fb_pan_display 2 %p %p", var, fbi); |
| dy = var->yoffset - fbi->var.yoffset; |
| if (dy) { |
| |
| u32 dmaaddr; |
| |
| print_dbg("Panning screen of %d lines", dy); |
| |
| dmaaddr = fbdev->regs->lcd_dmaaddr0; |
| dmaaddr += (fbi->fix.line_length * dy); |
| |
| /* TODO: Wait for current frame to finished */ |
| fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); |
| |
| if (panel_is_dual(fbdev->panel)) { |
| dmaaddr = fbdev->regs->lcd_dmaaddr1; |
| dmaaddr += (fbi->fix.line_length * dy); |
| fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); |
| } |
| } |
| print_dbg("fb_pan_display 3 %p %p", var, fbi); |
| |
| return 0; |
| } |
| |
| /* fb_rotate |
| * Rotate the display of this angle. This doesn't seems to be used by the core, |
| * but as our hardware supports it, so why not implementing it... |
| */ |
| void au1100fb_fb_rotate(struct fb_info *fbi, int angle) |
| { |
| struct au1100fb_device *fbdev = to_au1100fb_device(fbi); |
| |
| print_dbg("fb_rotate %p %d", fbi, angle); |
| |
| if (fbdev && (angle > 0) && !(angle % 90)) { |
| |
| fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; |
| |
| fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK); |
| fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT); |
| |
| fbdev->regs->lcd_control |= LCD_CONTROL_GO; |
| } |
| } |
| |
| /* fb_mmap |
| * Map video memory in user space. We don't use the generic fb_mmap method mainly |
| * to allow the use of the TLB streaming flag (CCA=6) |
| */ |
| int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma) |
| { |
| struct au1100fb_device *fbdev; |
| |
| fbdev = to_au1100fb_device(fbi); |
| |
| vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 |
| |
| return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len); |
| } |
| |
| static struct fb_ops au1100fb_ops = |
| { |
| .owner = THIS_MODULE, |
| .fb_setcolreg = au1100fb_fb_setcolreg, |
| .fb_blank = au1100fb_fb_blank, |
| .fb_pan_display = au1100fb_fb_pan_display, |
| .fb_fillrect = cfb_fillrect, |
| .fb_copyarea = cfb_copyarea, |
| .fb_imageblit = cfb_imageblit, |
| .fb_rotate = au1100fb_fb_rotate, |
| .fb_mmap = au1100fb_fb_mmap, |
| }; |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static int au1100fb_setup(struct au1100fb_device *fbdev) |
| { |
| char *this_opt, *options; |
| int num_panels = ARRAY_SIZE(known_lcd_panels); |
| |
| if (num_panels <= 0) { |
| print_err("No LCD panels supported by driver!"); |
| return -ENODEV; |
| } |
| |
| if (fb_get_options(DRIVER_NAME, &options)) |
| return -ENODEV; |
| if (!options) |
| return -ENODEV; |
| |
| while ((this_opt = strsep(&options, ",")) != NULL) { |
| /* Panel option */ |
| if (!strncmp(this_opt, "panel:", 6)) { |
| int i; |
| this_opt += 6; |
| for (i = 0; i < num_panels; i++) { |
| if (!strncmp(this_opt, known_lcd_panels[i].name, |
| strlen(this_opt))) { |
| fbdev->panel = &known_lcd_panels[i]; |
| fbdev->panel_idx = i; |
| break; |
| } |
| } |
| if (i >= num_panels) { |
| print_warn("Panel '%s' not supported!", this_opt); |
| return -ENODEV; |
| } |
| } |
| /* Unsupported option */ |
| else |
| print_warn("Unsupported option \"%s\"", this_opt); |
| } |
| |
| print_info("Panel=%s", fbdev->panel->name); |
| |
| return 0; |
| } |
| |
| static int au1100fb_drv_probe(struct platform_device *dev) |
| { |
| struct au1100fb_device *fbdev = NULL; |
| struct resource *regs_res; |
| unsigned long page; |
| u32 sys_clksrc; |
| |
| /* Allocate new device private */ |
| fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device), |
| GFP_KERNEL); |
| if (!fbdev) { |
| print_err("fail to allocate device private record"); |
| return -ENOMEM; |
| } |
| |
| if (au1100fb_setup(fbdev)) |
| goto failed; |
| |
| platform_set_drvdata(dev, (void *)fbdev); |
| |
| /* Allocate region for our registers and map them */ |
| regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| if (!regs_res) { |
| print_err("fail to retrieve registers resource"); |
| return -EFAULT; |
| } |
| |
| au1100fb_fix.mmio_start = regs_res->start; |
| au1100fb_fix.mmio_len = resource_size(regs_res); |
| |
| if (!devm_request_mem_region(&dev->dev, |
| au1100fb_fix.mmio_start, |
| au1100fb_fix.mmio_len, |
| DRIVER_NAME)) { |
| print_err("fail to lock memory region at 0x%08lx", |
| au1100fb_fix.mmio_start); |
| return -EBUSY; |
| } |
| |
| fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start); |
| |
| print_dbg("Register memory map at %p", fbdev->regs); |
| print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len); |
| |
| /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */ |
| fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres * |
| (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS; |
| |
| fbdev->fb_mem = dmam_alloc_coherent(&dev->dev, |
| PAGE_ALIGN(fbdev->fb_len), |
| &fbdev->fb_phys, GFP_KERNEL); |
| if (!fbdev->fb_mem) { |
| print_err("fail to allocate frambuffer (size: %dK))", |
| fbdev->fb_len / 1024); |
| return -ENOMEM; |
| } |
| |
| au1100fb_fix.smem_start = fbdev->fb_phys; |
| au1100fb_fix.smem_len = fbdev->fb_len; |
| |
| /* |
| * Set page reserved so that mmap will work. This is necessary |
| * since we'll be remapping normal memory. |
| */ |
| for (page = (unsigned long)fbdev->fb_mem; |
| page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len); |
| page += PAGE_SIZE) { |
| #ifdef CONFIG_DMA_NONCOHERENT |
| SetPageReserved(virt_to_page(CAC_ADDR((void *)page))); |
| #else |
| SetPageReserved(virt_to_page(page)); |
| #endif |
| } |
| |
| print_dbg("Framebuffer memory map at %p", fbdev->fb_mem); |
| print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024); |
| |
| /* Setup LCD clock to AUX (48 MHz) */ |
| sys_clksrc = alchemy_rdsys(AU1000_SYS_CLKSRC); |
| sys_clksrc &= ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL); |
| alchemy_wrsys((sys_clksrc | (1 << SYS_CS_ML_BIT)), AU1000_SYS_CLKSRC); |
| |
| /* load the panel info into the var struct */ |
| au1100fb_var.bits_per_pixel = fbdev->panel->bpp; |
| au1100fb_var.xres = fbdev->panel->xres; |
| au1100fb_var.xres_virtual = au1100fb_var.xres; |
| au1100fb_var.yres = fbdev->panel->yres; |
| au1100fb_var.yres_virtual = au1100fb_var.yres; |
| |
| fbdev->info.screen_base = fbdev->fb_mem; |
| fbdev->info.fbops = &au1100fb_ops; |
| fbdev->info.fix = au1100fb_fix; |
| |
| fbdev->info.pseudo_palette = |
| devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL); |
| if (!fbdev->info.pseudo_palette) |
| return -ENOMEM; |
| |
| if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) { |
| print_err("Fail to allocate colormap (%d entries)", |
| AU1100_LCD_NBR_PALETTE_ENTRIES); |
| return -EFAULT; |
| } |
| |
| fbdev->info.var = au1100fb_var; |
| |
| /* Set h/w registers */ |
| au1100fb_setmode(fbdev); |
| |
| /* Register new framebuffer */ |
| if (register_framebuffer(&fbdev->info) < 0) { |
| print_err("cannot register new framebuffer"); |
| goto failed; |
| } |
| |
| return 0; |
| |
| failed: |
| if (fbdev->fb_mem) { |
| dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem, |
| fbdev->fb_phys); |
| } |
| if (fbdev->info.cmap.len != 0) { |
| fb_dealloc_cmap(&fbdev->info.cmap); |
| } |
| |
| return -ENODEV; |
| } |
| |
| int au1100fb_drv_remove(struct platform_device *dev) |
| { |
| struct au1100fb_device *fbdev = NULL; |
| |
| if (!dev) |
| return -ENODEV; |
| |
| fbdev = platform_get_drvdata(dev); |
| |
| #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) |
| au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); |
| #endif |
| fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; |
| |
| /* Clean up all probe data */ |
| unregister_framebuffer(&fbdev->info); |
| |
| fb_dealloc_cmap(&fbdev->info.cmap); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static u32 sys_clksrc; |
| static struct au1100fb_regs fbregs; |
| |
| int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state) |
| { |
| struct au1100fb_device *fbdev = platform_get_drvdata(dev); |
| |
| if (!fbdev) |
| return 0; |
| |
| /* Save the clock source state */ |
| sys_clksrc = alchemy_rdsys(AU1000_SYS_CLKSRC); |
| |
| /* Blank the LCD */ |
| au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); |
| |
| /* Stop LCD clocking */ |
| alchemy_wrsys(sys_clksrc & ~SYS_CS_ML_MASK, AU1000_SYS_CLKSRC); |
| |
| memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); |
| |
| return 0; |
| } |
| |
| int au1100fb_drv_resume(struct platform_device *dev) |
| { |
| struct au1100fb_device *fbdev = platform_get_drvdata(dev); |
| |
| if (!fbdev) |
| return 0; |
| |
| memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs)); |
| |
| /* Restart LCD clocking */ |
| alchemy_wrsys(sys_clksrc, AU1000_SYS_CLKSRC); |
| |
| /* Unblank the LCD */ |
| au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info); |
| |
| return 0; |
| } |
| #else |
| #define au1100fb_drv_suspend NULL |
| #define au1100fb_drv_resume NULL |
| #endif |
| |
| static struct platform_driver au1100fb_driver = { |
| .driver = { |
| .name = "au1100-lcd", |
| .owner = THIS_MODULE, |
| }, |
| .probe = au1100fb_drv_probe, |
| .remove = au1100fb_drv_remove, |
| .suspend = au1100fb_drv_suspend, |
| .resume = au1100fb_drv_resume, |
| }; |
| module_platform_driver(au1100fb_driver); |
| |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |