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605 lines
16 KiB
605 lines
16 KiB
/* |
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* BRIEF MODULE DESCRIPTION |
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* Au1100 LCD Driver. |
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* |
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* Rewritten for 2.6 by Embedded Alley Solutions |
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* <[email protected]>, based on submissions by |
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* Karl Lessard <[email protected]> |
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* <[email protected]> |
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* |
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* PM support added by Rodolfo Giometti <[email protected]> |
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* Cursor enable/disable by Rodolfo Giometti <[email protected]> |
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* |
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* Copyright 2002 MontaVista Software |
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* Author: MontaVista Software, Inc. |
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* [email protected] or [email protected] |
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* |
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* Copyright 2002 Alchemy Semiconductor |
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* Author: Alchemy Semiconductor |
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* |
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* Based on: |
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* linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device |
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* Created 28 Dec 1997 by Geert Uytterhoeven |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the |
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* Free Software Foundation; either version 2 of the License, or (at your |
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* option) any later version. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include <linux/clk.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/mm.h> |
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#include <linux/fb.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/ctype.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/platform_device.h> |
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#include <linux/slab.h> |
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#include <asm/mach-au1x00/au1000.h> |
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#define DEBUG 0 |
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#include "au1100fb.h" |
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|
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#define DRIVER_NAME "au1100fb" |
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#define DRIVER_DESC "LCD controller driver for AU1100 processors" |
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|
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#define to_au1100fb_device(_info) \ |
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(_info ? container_of(_info, struct au1100fb_device, info) : NULL); |
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|
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/* Bitfields format supported by the controller. Note that the order of formats |
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* SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the |
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* right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF] |
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*/ |
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struct fb_bitfield rgb_bitfields[][4] = |
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{ |
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/* Red, Green, Blue, Transp */ |
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{ { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, |
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{ { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, |
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{ { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } }, |
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{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } }, |
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{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } }, |
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/* The last is used to describe 12bpp format */ |
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{ { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } }, |
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}; |
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static struct fb_fix_screeninfo au1100fb_fix = { |
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.id = "AU1100 FB", |
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.xpanstep = 1, |
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.ypanstep = 1, |
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.type = FB_TYPE_PACKED_PIXELS, |
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.accel = FB_ACCEL_NONE, |
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}; |
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static struct fb_var_screeninfo au1100fb_var = { |
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.activate = FB_ACTIVATE_NOW, |
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.height = -1, |
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.width = -1, |
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.vmode = FB_VMODE_NONINTERLACED, |
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}; |
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/* fb_blank |
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* Blank the screen. Depending on the mode, the screen will be |
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* activated with the backlight color, or desactivated |
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*/ |
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static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi) |
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{ |
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struct au1100fb_device *fbdev = to_au1100fb_device(fbi); |
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print_dbg("fb_blank %d %p", blank_mode, fbi); |
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switch (blank_mode) { |
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case VESA_NO_BLANKING: |
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/* Turn on panel */ |
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fbdev->regs->lcd_control |= LCD_CONTROL_GO; |
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wmb(); /* drain writebuffer */ |
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break; |
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case VESA_VSYNC_SUSPEND: |
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case VESA_HSYNC_SUSPEND: |
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case VESA_POWERDOWN: |
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/* Turn off panel */ |
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fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; |
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wmb(); /* drain writebuffer */ |
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break; |
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default: |
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break; |
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} |
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return 0; |
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} |
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/* |
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* Set hardware with var settings. This will enable the controller with a specific |
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* mode, normally validated with the fb_check_var method |
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*/ |
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int au1100fb_setmode(struct au1100fb_device *fbdev) |
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{ |
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struct fb_info *info = &fbdev->info; |
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u32 words; |
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int index; |
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if (!fbdev) |
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return -EINVAL; |
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/* Update var-dependent FB info */ |
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if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) { |
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if (info->var.bits_per_pixel <= 8) { |
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/* palettized */ |
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info->var.red.offset = 0; |
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info->var.red.length = info->var.bits_per_pixel; |
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info->var.red.msb_right = 0; |
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info->var.green.offset = 0; |
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info->var.green.length = info->var.bits_per_pixel; |
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info->var.green.msb_right = 0; |
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info->var.blue.offset = 0; |
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info->var.blue.length = info->var.bits_per_pixel; |
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info->var.blue.msb_right = 0; |
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info->var.transp.offset = 0; |
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info->var.transp.length = 0; |
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info->var.transp.msb_right = 0; |
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
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info->fix.line_length = info->var.xres_virtual / |
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(8/info->var.bits_per_pixel); |
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} else { |
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/* non-palettized */ |
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index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT; |
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info->var.red = rgb_bitfields[index][0]; |
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info->var.green = rgb_bitfields[index][1]; |
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info->var.blue = rgb_bitfields[index][2]; |
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info->var.transp = rgb_bitfields[index][3]; |
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info->fix.visual = FB_VISUAL_TRUECOLOR; |
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info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */ |
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} |
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} else { |
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/* mono */ |
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info->fix.visual = FB_VISUAL_MONO10; |
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info->fix.line_length = info->var.xres_virtual / 8; |
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} |
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info->screen_size = info->fix.line_length * info->var.yres_virtual; |
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info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \ |
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>> LCD_CONTROL_SM_BIT) * 90; |
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/* Determine BPP mode and format */ |
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fbdev->regs->lcd_control = fbdev->panel->control_base; |
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fbdev->regs->lcd_horztiming = fbdev->panel->horztiming; |
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fbdev->regs->lcd_verttiming = fbdev->panel->verttiming; |
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fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base; |
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fbdev->regs->lcd_intenable = 0; |
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fbdev->regs->lcd_intstatus = 0; |
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fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys); |
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if (panel_is_dual(fbdev->panel)) { |
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/* Second panel display seconf half of screen if possible, |
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* otherwise display the same as the first panel */ |
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if (info->var.yres_virtual >= (info->var.yres << 1)) { |
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fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys + |
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(info->fix.line_length * |
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(info->var.yres_virtual >> 1))); |
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} else { |
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fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys); |
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} |
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} |
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words = info->fix.line_length / sizeof(u32); |
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if (!info->var.rotate || (info->var.rotate == 180)) { |
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words *= info->var.yres_virtual; |
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if (info->var.rotate /* 180 */) { |
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words -= (words % 8); /* should be divisable by 8 */ |
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} |
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} |
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fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words); |
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fbdev->regs->lcd_pwmdiv = 0; |
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fbdev->regs->lcd_pwmhi = 0; |
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/* Resume controller */ |
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fbdev->regs->lcd_control |= LCD_CONTROL_GO; |
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mdelay(10); |
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au1100fb_fb_blank(VESA_NO_BLANKING, info); |
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return 0; |
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} |
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/* fb_setcolreg |
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* Set color in LCD palette. |
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*/ |
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int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi) |
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{ |
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struct au1100fb_device *fbdev; |
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u32 *palette; |
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u32 value; |
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fbdev = to_au1100fb_device(fbi); |
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palette = fbdev->regs->lcd_pallettebase; |
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if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1)) |
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return -EINVAL; |
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if (fbi->var.grayscale) { |
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/* Convert color to grayscale */ |
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red = green = blue = |
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(19595 * red + 38470 * green + 7471 * blue) >> 16; |
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} |
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if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) { |
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/* Place color in the pseudopalette */ |
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if (regno > 16) |
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return -EINVAL; |
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palette = (u32*)fbi->pseudo_palette; |
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red >>= (16 - fbi->var.red.length); |
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green >>= (16 - fbi->var.green.length); |
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blue >>= (16 - fbi->var.blue.length); |
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value = (red << fbi->var.red.offset) | |
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(green << fbi->var.green.offset)| |
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(blue << fbi->var.blue.offset); |
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value &= 0xFFFF; |
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} else if (panel_is_active(fbdev->panel)) { |
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/* COLOR TFT PALLETTIZED (use RGB 565) */ |
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value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F); |
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value &= 0xFFFF; |
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} else if (panel_is_color(fbdev->panel)) { |
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/* COLOR STN MODE */ |
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value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) | |
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((green >> 8) & 0x00F0) | |
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(((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00); |
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value &= 0xFFF; |
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} else { |
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/* MONOCHROME MODE */ |
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value = (green >> 12) & 0x000F; |
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value &= 0xF; |
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} |
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palette[regno] = value; |
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return 0; |
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} |
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/* fb_pan_display |
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* Pan display in x and/or y as specified |
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*/ |
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int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi) |
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{ |
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struct au1100fb_device *fbdev; |
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int dy; |
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fbdev = to_au1100fb_device(fbi); |
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print_dbg("fb_pan_display %p %p", var, fbi); |
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if (!var || !fbdev) { |
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return -EINVAL; |
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} |
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if (var->xoffset - fbi->var.xoffset) { |
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/* No support for X panning for now! */ |
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return -EINVAL; |
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} |
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print_dbg("fb_pan_display 2 %p %p", var, fbi); |
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dy = var->yoffset - fbi->var.yoffset; |
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if (dy) { |
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u32 dmaaddr; |
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print_dbg("Panning screen of %d lines", dy); |
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dmaaddr = fbdev->regs->lcd_dmaaddr0; |
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dmaaddr += (fbi->fix.line_length * dy); |
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/* TODO: Wait for current frame to finished */ |
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fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); |
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if (panel_is_dual(fbdev->panel)) { |
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dmaaddr = fbdev->regs->lcd_dmaaddr1; |
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dmaaddr += (fbi->fix.line_length * dy); |
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fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); |
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} |
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} |
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print_dbg("fb_pan_display 3 %p %p", var, fbi); |
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return 0; |
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} |
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/* fb_mmap |
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* Map video memory in user space. We don't use the generic fb_mmap method mainly |
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* to allow the use of the TLB streaming flag (CCA=6) |
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*/ |
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int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma) |
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{ |
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struct au1100fb_device *fbdev = to_au1100fb_device(fbi); |
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pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 |
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return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys, |
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fbdev->fb_len); |
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} |
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static const struct fb_ops au1100fb_ops = |
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{ |
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.owner = THIS_MODULE, |
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.fb_setcolreg = au1100fb_fb_setcolreg, |
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.fb_blank = au1100fb_fb_blank, |
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.fb_pan_display = au1100fb_fb_pan_display, |
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.fb_fillrect = cfb_fillrect, |
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.fb_copyarea = cfb_copyarea, |
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.fb_imageblit = cfb_imageblit, |
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.fb_mmap = au1100fb_fb_mmap, |
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}; |
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/*-------------------------------------------------------------------------*/ |
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static int au1100fb_setup(struct au1100fb_device *fbdev) |
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{ |
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char *this_opt, *options; |
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int num_panels = ARRAY_SIZE(known_lcd_panels); |
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if (num_panels <= 0) { |
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print_err("No LCD panels supported by driver!"); |
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return -ENODEV; |
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} |
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if (fb_get_options(DRIVER_NAME, &options)) |
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return -ENODEV; |
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if (!options) |
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return -ENODEV; |
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while ((this_opt = strsep(&options, ",")) != NULL) { |
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/* Panel option */ |
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if (!strncmp(this_opt, "panel:", 6)) { |
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int i; |
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this_opt += 6; |
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for (i = 0; i < num_panels; i++) { |
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if (!strncmp(this_opt, known_lcd_panels[i].name, |
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strlen(this_opt))) { |
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fbdev->panel = &known_lcd_panels[i]; |
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fbdev->panel_idx = i; |
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break; |
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} |
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} |
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if (i >= num_panels) { |
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print_warn("Panel '%s' not supported!", this_opt); |
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return -ENODEV; |
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} |
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} |
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/* Unsupported option */ |
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else |
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print_warn("Unsupported option \"%s\"", this_opt); |
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} |
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print_info("Panel=%s", fbdev->panel->name); |
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return 0; |
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} |
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static int au1100fb_drv_probe(struct platform_device *dev) |
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{ |
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struct au1100fb_device *fbdev; |
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struct resource *regs_res; |
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struct clk *c; |
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/* Allocate new device private */ |
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fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL); |
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if (!fbdev) |
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return -ENOMEM; |
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if (au1100fb_setup(fbdev)) |
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goto failed; |
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platform_set_drvdata(dev, (void *)fbdev); |
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fbdev->dev = &dev->dev; |
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/* Allocate region for our registers and map them */ |
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regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
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if (!regs_res) { |
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print_err("fail to retrieve registers resource"); |
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return -EFAULT; |
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} |
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au1100fb_fix.mmio_start = regs_res->start; |
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au1100fb_fix.mmio_len = resource_size(regs_res); |
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if (!devm_request_mem_region(&dev->dev, |
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au1100fb_fix.mmio_start, |
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au1100fb_fix.mmio_len, |
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DRIVER_NAME)) { |
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print_err("fail to lock memory region at 0x%08lx", |
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au1100fb_fix.mmio_start); |
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return -EBUSY; |
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} |
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fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start); |
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print_dbg("Register memory map at %p", fbdev->regs); |
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print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len); |
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c = clk_get(NULL, "lcd_intclk"); |
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if (!IS_ERR(c)) { |
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fbdev->lcdclk = c; |
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clk_set_rate(c, 48000000); |
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clk_prepare_enable(c); |
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} |
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/* Allocate the framebuffer to the maximum screen size * nbr of video buffers */ |
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fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres * |
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(fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS; |
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fbdev->fb_mem = dmam_alloc_coherent(&dev->dev, |
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PAGE_ALIGN(fbdev->fb_len), |
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&fbdev->fb_phys, GFP_KERNEL); |
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if (!fbdev->fb_mem) { |
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print_err("fail to allocate framebuffer (size: %dK))", |
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fbdev->fb_len / 1024); |
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return -ENOMEM; |
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} |
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au1100fb_fix.smem_start = fbdev->fb_phys; |
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au1100fb_fix.smem_len = fbdev->fb_len; |
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print_dbg("Framebuffer memory map at %p", fbdev->fb_mem); |
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print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024); |
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/* load the panel info into the var struct */ |
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au1100fb_var.bits_per_pixel = fbdev->panel->bpp; |
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au1100fb_var.xres = fbdev->panel->xres; |
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au1100fb_var.xres_virtual = au1100fb_var.xres; |
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au1100fb_var.yres = fbdev->panel->yres; |
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au1100fb_var.yres_virtual = au1100fb_var.yres; |
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fbdev->info.screen_base = fbdev->fb_mem; |
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fbdev->info.fbops = &au1100fb_ops; |
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fbdev->info.fix = au1100fb_fix; |
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fbdev->info.pseudo_palette = |
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devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL); |
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if (!fbdev->info.pseudo_palette) |
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return -ENOMEM; |
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if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) { |
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print_err("Fail to allocate colormap (%d entries)", |
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AU1100_LCD_NBR_PALETTE_ENTRIES); |
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return -EFAULT; |
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} |
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fbdev->info.var = au1100fb_var; |
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/* Set h/w registers */ |
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au1100fb_setmode(fbdev); |
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/* Register new framebuffer */ |
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if (register_framebuffer(&fbdev->info) < 0) { |
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print_err("cannot register new framebuffer"); |
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goto failed; |
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} |
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return 0; |
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failed: |
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if (fbdev->lcdclk) { |
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clk_disable_unprepare(fbdev->lcdclk); |
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clk_put(fbdev->lcdclk); |
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} |
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if (fbdev->info.cmap.len != 0) { |
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fb_dealloc_cmap(&fbdev->info.cmap); |
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} |
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return -ENODEV; |
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} |
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int au1100fb_drv_remove(struct platform_device *dev) |
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{ |
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struct au1100fb_device *fbdev = NULL; |
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|
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if (!dev) |
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return -ENODEV; |
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fbdev = platform_get_drvdata(dev); |
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#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) |
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au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); |
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#endif |
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fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; |
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|
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/* Clean up all probe data */ |
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unregister_framebuffer(&fbdev->info); |
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|
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fb_dealloc_cmap(&fbdev->info.cmap); |
|
|
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if (fbdev->lcdclk) { |
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clk_disable_unprepare(fbdev->lcdclk); |
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clk_put(fbdev->lcdclk); |
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} |
|
|
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return 0; |
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} |
|
|
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#ifdef CONFIG_PM |
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static struct au1100fb_regs fbregs; |
|
|
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int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state) |
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{ |
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struct au1100fb_device *fbdev = platform_get_drvdata(dev); |
|
|
|
if (!fbdev) |
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return 0; |
|
|
|
/* Blank the LCD */ |
|
au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); |
|
|
|
if (fbdev->lcdclk) |
|
clk_disable(fbdev->lcdclk); |
|
|
|
memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); |
|
|
|
return 0; |
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} |
|
|
|
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)); |
|
|
|
if (fbdev->lcdclk) |
|
clk_enable(fbdev->lcdclk); |
|
|
|
/* 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", |
|
}, |
|
.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");
|
|
|