WSL2-Linux-Kernel/drivers/video/au1100fb.c

679 строки
18 KiB
C
Исходник Обычный вид История

/*
* 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 cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 11:04:11 +03:00
#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;
au_sync();
break;
case VESA_VSYNC_SUSPEND:
case VESA_HSYNC_SUSPEND:
case VESA_POWERDOWN:
/* Turn off panel */
fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
au_sync();
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;
unsigned int len;
unsigned long start=0, off;
fbdev = to_au1100fb_device(fbi);
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
return -EINVAL;
}
start = fbdev->fb_phys & PAGE_MASK;
len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
off = vma->vm_pgoff << PAGE_SHIFT;
if ((vma->vm_end - vma->vm_start + off) > len) {
return -EINVAL;
}
off += start;
vma->vm_pgoff = off >> PAGE_SHIFT;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
vma->vm_page_prot)) {
return -EAGAIN;
}
return 0;
}
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 = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), 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 = (struct au1100fb_device *) 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 = au_readl(SYS_CLKSRC);
/* Blank the LCD */
au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
/* Stop LCD clocking */
au_writel(sys_clksrc & ~SYS_CS_ML_MASK, 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 */
au_writel(sys_clksrc, 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,
};
static int __init au1100fb_load(void)
{
return platform_driver_register(&au1100fb_driver);
}
static void __exit au1100fb_unload(void)
{
platform_driver_unregister(&au1100fb_driver);
}
module_init(au1100fb_load);
module_exit(au1100fb_unload);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");