forked from rrcarlosr/Jetpack
629 lines
17 KiB
C
629 lines
17 KiB
C
/*
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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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* <source@embeddedalley.com>, based on submissions by
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* Karl Lessard <klessard@sunrisetelecom.com>
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* <c.pellegrin@exadron.com>
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*
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* PM support added by Rodolfo Giometti <giometti@linux.it>
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* Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
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*
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* Copyright 2002 MontaVista Software
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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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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#define DRIVER_NAME "au1100fb"
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#define DRIVER_DESC "LCD controller driver for AU1100 processors"
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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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/* 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;
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fbdev = to_au1100fb_device(fbi);
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vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
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return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
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}
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static 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 = NULL;
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struct resource *regs_res;
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unsigned long page;
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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(struct au1100fb_device),
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GFP_KERNEL);
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if (!fbdev) {
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print_err("fail to allocate device private record");
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return -ENOMEM;
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}
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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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/* 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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|
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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 frambuffer (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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|
|
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/*
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* 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);
|
|
|
|
/* 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->lcdclk) {
|
|
clk_disable_unprepare(fbdev->lcdclk);
|
|
clk_put(fbdev->lcdclk);
|
|
}
|
|
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);
|
|
|
|
if (fbdev->lcdclk) {
|
|
clk_disable_unprepare(fbdev->lcdclk);
|
|
clk_put(fbdev->lcdclk);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
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;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
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");
|