677 lines
16 KiB
C
677 lines
16 KiB
C
![]() |
/*
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* BRIEF MODULE DESCRIPTION
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* Au1100 LCD Driver.
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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/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/tty.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <asm/au1000.h>
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#include <asm/pb1100.h>
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#include "au1100fb.h"
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#include <video/fbcon.h>
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#include <video/fbcon-mfb.h>
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#include <video/fbcon-cfb2.h>
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#include <video/fbcon-cfb4.h>
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#include <video/fbcon-cfb8.h>
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#include <video/fbcon-cfb16.h>
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/*
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* Sanity check. If this is a new Au1100 based board, search for
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* the PB1100 ifdefs to make sure you modify the code accordingly.
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*/
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#if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100) || defined(CONFIG_MIPS_HYDROGEN3)
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#else
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error Unknown Au1100 board
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#endif
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#define CMAPSIZE 16
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static int my_lcd_index; /* default is zero */
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struct known_lcd_panels *p_lcd;
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AU1100_LCD *p_lcd_reg = (AU1100_LCD *)AU1100_LCD_ADDR;
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struct au1100fb_info {
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struct fb_info_gen gen;
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unsigned long fb_virt_start;
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unsigned long fb_size;
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unsigned long fb_phys;
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int mmaped;
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int nohwcursor;
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struct { unsigned red, green, blue, pad; } palette[256];
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#if defined(FBCON_HAS_CFB16)
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u16 fbcon_cmap16[16];
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#endif
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};
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struct au1100fb_par {
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struct fb_var_screeninfo var;
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int line_length; // in bytes
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int cmap_len; // color-map length
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};
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static struct au1100fb_info fb_info;
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static struct au1100fb_par current_par;
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static struct display disp;
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int au1100fb_init(void);
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void au1100fb_setup(char *options, int *ints);
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static int au1100fb_mmap(struct fb_info *fb, struct file *file,
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struct vm_area_struct *vma);
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static int au1100_blank(int blank_mode, struct fb_info_gen *info);
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static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
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u_long arg, int con, struct fb_info *info);
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void au1100_nocursor(struct display *p, int mode, int xx, int yy){};
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static struct fb_ops au1100fb_ops = {
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owner: THIS_MODULE,
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fb_get_fix: fbgen_get_fix,
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fb_get_var: fbgen_get_var,
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fb_set_var: fbgen_set_var,
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fb_get_cmap: fbgen_get_cmap,
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fb_set_cmap: fbgen_set_cmap,
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fb_pan_display: fbgen_pan_display,
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fb_ioctl: au1100fb_ioctl,
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fb_mmap: au1100fb_mmap,
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};
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static void au1100_detect(void)
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{
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/*
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* This function should detect the current video mode settings
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* and store it as the default video mode
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*/
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/*
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* Yeh, well, we're not going to change any settings so we're
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* always stuck with the default ...
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*/
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}
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static int au1100_encode_fix(struct fb_fix_screeninfo *fix,
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const void *_par, struct fb_info_gen *_info)
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{
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struct au1100fb_info *info = (struct au1100fb_info *) _info;
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struct au1100fb_par *par = (struct au1100fb_par *) _par;
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struct fb_var_screeninfo *var = &par->var;
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memset(fix, 0, sizeof(struct fb_fix_screeninfo));
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fix->smem_start = info->fb_phys;
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fix->smem_len = info->fb_size;
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fix->type = FB_TYPE_PACKED_PIXELS;
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fix->type_aux = 0;
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fix->visual = (var->bits_per_pixel == 8) ?
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FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
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fix->ywrapstep = 0;
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fix->xpanstep = 1;
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fix->ypanstep = 1;
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fix->line_length = current_par.line_length;
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return 0;
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}
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static void set_color_bitfields(struct fb_var_screeninfo *var)
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{
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switch (var->bits_per_pixel) {
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case 8:
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var->red.offset = 0;
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var->red.length = 8;
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var->green.offset = 0;
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var->green.length = 8;
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var->blue.offset = 0;
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var->blue.length = 8;
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var->transp.offset = 0;
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var->transp.length = 0;
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break;
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case 16: /* RGB 565 */
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var->red.offset = 11;
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var->red.length = 5;
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var->green.offset = 5;
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var->green.length = 6;
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var->blue.offset = 0;
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var->blue.length = 5;
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var->transp.offset = 0;
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var->transp.length = 0;
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break;
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}
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var->red.msb_right = 0;
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var->green.msb_right = 0;
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var->blue.msb_right = 0;
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var->transp.msb_right = 0;
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}
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static int au1100_decode_var(const struct fb_var_screeninfo *var,
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void *_par, struct fb_info_gen *_info)
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{
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struct au1100fb_par *par = (struct au1100fb_par *)_par;
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/*
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* Don't allow setting any of these yet: xres and yres don't
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* make sense for LCD panels.
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*/
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if (var->xres != p_lcd->xres ||
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var->yres != p_lcd->yres ||
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var->xres != p_lcd->xres ||
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var->yres != p_lcd->yres) {
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return -EINVAL;
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}
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if(var->bits_per_pixel != p_lcd->bpp) {
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return -EINVAL;
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}
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memset(par, 0, sizeof(struct au1100fb_par));
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par->var = *var;
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/* FIXME */
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switch (var->bits_per_pixel) {
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case 8:
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par->var.bits_per_pixel = 8;
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break;
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case 16:
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par->var.bits_per_pixel = 16;
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break;
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default:
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printk("color depth %d bpp not supported\n",
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var->bits_per_pixel);
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return -EINVAL;
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}
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set_color_bitfields(&par->var);
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par->cmap_len = (par->var.bits_per_pixel == 8) ? 256 : 16;
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return 0;
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}
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static int au1100_encode_var(struct fb_var_screeninfo *var,
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const void *par, struct fb_info_gen *_info)
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{
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*var = ((struct au1100fb_par *)par)->var;
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return 0;
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}
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static void
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au1100_get_par(void *_par, struct fb_info_gen *_info)
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{
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*(struct au1100fb_par *)_par = current_par;
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}
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static void au1100_set_par(const void *par, struct fb_info_gen *info)
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{
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/* nothing to do: we don't change any settings */
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}
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static int au1100_getcolreg(unsigned regno, unsigned *red, unsigned *green,
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unsigned *blue, unsigned *transp,
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struct fb_info *info)
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{
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struct au1100fb_info* i = (struct au1100fb_info*)info;
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if (regno > 255)
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return 1;
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*red = i->palette[regno].red;
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*green = i->palette[regno].green;
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*blue = i->palette[regno].blue;
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*transp = 0;
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return 0;
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}
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static int au1100_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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{
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struct au1100fb_info* i = (struct au1100fb_info *)info;
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u32 rgbcol;
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if (regno > 255)
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return 1;
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i->palette[regno].red = red;
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i->palette[regno].green = green;
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i->palette[regno].blue = blue;
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switch(p_lcd->bpp) {
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#ifdef FBCON_HAS_CFB8
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case 8:
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red >>= 10;
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green >>= 10;
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blue >>= 10;
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p_lcd_reg->lcd_pallettebase[regno] = (blue&0x1f) |
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((green&0x3f)<<5) | ((red&0x1f)<<11);
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break;
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#endif
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#ifdef FBCON_HAS_CFB16
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case 16:
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i->fbcon_cmap16[regno] =
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((red & 0xf800) >> 0) |
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((green & 0xfc00) >> 5) |
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((blue & 0xf800) >> 11);
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break;
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#endif
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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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static int au1100_blank(int blank_mode, struct fb_info_gen *_info)
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{
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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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//printk("turn on panel\n");
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#ifdef CONFIG_MIPS_PB1100
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p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
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au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
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PB1100_G_CONTROL);
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#endif
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#ifdef CONFIG_MIPS_HYDROGEN3
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/* Turn controller & power supply on, GPIO213 */
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au_writel(0x20002000, 0xB1700008);
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au_writel(0x00040000, 0xB1900108);
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au_writel(0x01000100, 0xB1700008);
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#endif
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au_sync();
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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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//printk("turn off panel\n");
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#ifdef CONFIG_MIPS_PB1100
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au_writew(au_readw(PB1100_G_CONTROL) & ~p_lcd->mode_backlight,
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PB1100_G_CONTROL);
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p_lcd_reg->lcd_control &= ~LCD_CONTROL_GO;
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#endif
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au_sync();
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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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static void au1100_set_disp(const void *unused, struct display *disp,
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struct fb_info_gen *info)
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{
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disp->screen_base = (char *)fb_info.fb_virt_start;
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switch (disp->var.bits_per_pixel) {
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#ifdef FBCON_HAS_CFB8
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case 8:
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disp->dispsw = &fbcon_cfb8;
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if (fb_info.nohwcursor)
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fbcon_cfb8.cursor = au1100_nocursor;
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break;
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#endif
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#ifdef FBCON_HAS_CFB16
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case 16:
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disp->dispsw = &fbcon_cfb16;
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disp->dispsw_data = fb_info.fbcon_cmap16;
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if (fb_info.nohwcursor)
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fbcon_cfb16.cursor = au1100_nocursor;
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break;
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#endif
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default:
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disp->dispsw = &fbcon_dummy;
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disp->dispsw_data = NULL;
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break;
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}
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}
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static int
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au1100fb_mmap(struct fb_info *_fb,
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struct file *file,
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struct vm_area_struct *vma)
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{
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unsigned int len;
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unsigned long start=0, off;
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struct au1100fb_info *fb = (struct au1100fb_info *)_fb;
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if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
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return -EINVAL;
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}
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start = fb_info.fb_phys & PAGE_MASK;
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len = PAGE_ALIGN((start & ~PAGE_MASK) + fb_info.fb_size);
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off = vma->vm_pgoff << PAGE_SHIFT;
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if ((vma->vm_end - vma->vm_start + off) > len) {
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return -EINVAL;
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}
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off += start;
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vma->vm_pgoff = off >> PAGE_SHIFT;
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pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
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//pgprot_val(vma->vm_page_prot) |= _CACHE_CACHABLE_NONCOHERENT;
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pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
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/* This is an IO map - tell maydump to skip this VMA */
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vma->vm_flags |= VM_IO;
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if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
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vma->vm_end - vma->vm_start,
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vma->vm_page_prot)) {
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return -EAGAIN;
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}
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fb->mmaped = 1;
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return 0;
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}
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int au1100_pan_display(const struct fb_var_screeninfo *var,
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struct fb_info_gen *info)
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{
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return 0;
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}
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static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
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u_long arg, int con, struct fb_info *info)
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{
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/* nothing to do yet */
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return -EINVAL;
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}
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static struct fbgen_hwswitch au1100_switch = {
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au1100_detect,
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au1100_encode_fix,
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|
au1100_decode_var,
|
||
|
au1100_encode_var,
|
||
|
au1100_get_par,
|
||
|
au1100_set_par,
|
||
|
au1100_getcolreg,
|
||
|
au1100_setcolreg,
|
||
|
au1100_pan_display,
|
||
|
au1100_blank,
|
||
|
au1100_set_disp
|
||
|
};
|
||
|
|
||
|
|
||
|
int au1100_setmode(void)
|
||
|
{
|
||
|
int words;
|
||
|
|
||
|
/* FIXME Need to accomodate for swivel mode and 12bpp, <8bpp*/
|
||
|
switch (p_lcd->mode_control & LCD_CONTROL_SM)
|
||
|
{
|
||
|
case LCD_CONTROL_SM_0:
|
||
|
case LCD_CONTROL_SM_180:
|
||
|
words = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 32;
|
||
|
break;
|
||
|
case LCD_CONTROL_SM_90:
|
||
|
case LCD_CONTROL_SM_270:
|
||
|
/* is this correct? */
|
||
|
words = (p_lcd->xres * p_lcd->bpp) / 8;
|
||
|
break;
|
||
|
default:
|
||
|
printk("mode_control reg not initialized\n");
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Setup LCD controller
|
||
|
*/
|
||
|
|
||
|
p_lcd_reg->lcd_control = p_lcd->mode_control;
|
||
|
p_lcd_reg->lcd_intstatus = 0;
|
||
|
p_lcd_reg->lcd_intenable = 0;
|
||
|
p_lcd_reg->lcd_horztiming = p_lcd->mode_horztiming;
|
||
|
p_lcd_reg->lcd_verttiming = p_lcd->mode_verttiming;
|
||
|
p_lcd_reg->lcd_clkcontrol = p_lcd->mode_clkcontrol;
|
||
|
p_lcd_reg->lcd_words = words - 1;
|
||
|
p_lcd_reg->lcd_dmaaddr0 = fb_info.fb_phys;
|
||
|
|
||
|
/* turn on panel */
|
||
|
#ifdef CONFIG_MIPS_PB1100
|
||
|
au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
|
||
|
PB1100_G_CONTROL);
|
||
|
#endif
|
||
|
#ifdef CONFIG_MIPS_HYDROGEN3
|
||
|
/* Turn controller & power supply on, GPIO213 */
|
||
|
au_writel(0x20002000, 0xB1700008);
|
||
|
au_writel(0x00040000, 0xB1900108);
|
||
|
au_writel(0x01000100, 0xB1700008);
|
||
|
#endif
|
||
|
|
||
|
p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
int __init au1100fb_init(void)
|
||
|
{
|
||
|
uint32 sys_clksrc;
|
||
|
unsigned long page;
|
||
|
|
||
|
/*
|
||
|
* Get the panel information/display mode and update the registry
|
||
|
*/
|
||
|
p_lcd = &panels[my_lcd_index];
|
||
|
|
||
|
switch (p_lcd->mode_control & LCD_CONTROL_SM)
|
||
|
{
|
||
|
case LCD_CONTROL_SM_0:
|
||
|
case LCD_CONTROL_SM_180:
|
||
|
p_lcd->xres =
|
||
|
(p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
|
||
|
p_lcd->yres =
|
||
|
(p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
|
||
|
break;
|
||
|
case LCD_CONTROL_SM_90:
|
||
|
case LCD_CONTROL_SM_270:
|
||
|
p_lcd->yres =
|
||
|
(p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
|
||
|
p_lcd->xres =
|
||
|
(p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Panel dimensions x bpp must be divisible by 32
|
||
|
*/
|
||
|
if (((p_lcd->yres * p_lcd->bpp) % 32) != 0)
|
||
|
printk("VERT %% 32\n");
|
||
|
if (((p_lcd->xres * p_lcd->bpp) % 32) != 0)
|
||
|
printk("HORZ %% 32\n");
|
||
|
|
||
|
/*
|
||
|
* Allocate LCD framebuffer from system memory
|
||
|
*/
|
||
|
fb_info.fb_size = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 8;
|
||
|
|
||
|
current_par.var.xres = p_lcd->xres;
|
||
|
current_par.var.xres_virtual = p_lcd->xres;
|
||
|
current_par.var.yres = p_lcd->yres;
|
||
|
current_par.var.yres_virtual = p_lcd->yres;
|
||
|
current_par.var.bits_per_pixel = p_lcd->bpp;
|
||
|
|
||
|
/* FIX!!! only works for 8/16 bpp */
|
||
|
current_par.line_length = p_lcd->xres * p_lcd->bpp / 8; /* in bytes */
|
||
|
fb_info.fb_virt_start = (unsigned long )
|
||
|
__get_free_pages(GFP_ATOMIC | GFP_DMA,
|
||
|
get_order(fb_info.fb_size + 0x1000));
|
||
|
if (!fb_info.fb_virt_start) {
|
||
|
printk("Unable to allocate fb memory\n");
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
fb_info.fb_phys = virt_to_bus((void *)fb_info.fb_virt_start);
|
||
|
|
||
|
/*
|
||
|
* Set page reserved so that mmap will work. This is necessary
|
||
|
* since we'll be remapping normal memory.
|
||
|
*/
|
||
|
for (page = fb_info.fb_virt_start;
|
||
|
page < PAGE_ALIGN(fb_info.fb_virt_start + fb_info.fb_size);
|
||
|
page += PAGE_SIZE) {
|
||
|
SetPageReserved(virt_to_page(page));
|
||
|
}
|
||
|
|
||
|
memset((void *)fb_info.fb_virt_start, 0, fb_info.fb_size);
|
||
|
|
||
|
/* set freqctrl now to allow more time to stabilize */
|
||
|
/* zero-out out LCD bits */
|
||
|
sys_clksrc = au_readl(SYS_CLKSRC) & ~0x000003e0;
|
||
|
sys_clksrc |= p_lcd->mode_toyclksrc;
|
||
|
au_writel(sys_clksrc, SYS_CLKSRC);
|
||
|
|
||
|
/* FIXME add check to make sure auxpll is what is expected! */
|
||
|
au1100_setmode();
|
||
|
|
||
|
fb_info.gen.parsize = sizeof(struct au1100fb_par);
|
||
|
fb_info.gen.fbhw = &au1100_switch;
|
||
|
|
||
|
strcpy(fb_info.gen.info.modename, "Au1100 LCD");
|
||
|
fb_info.gen.info.changevar = NULL;
|
||
|
fb_info.gen.info.node = -1;
|
||
|
|
||
|
fb_info.gen.info.fbops = &au1100fb_ops;
|
||
|
fb_info.gen.info.disp = &disp;
|
||
|
fb_info.gen.info.switch_con = &fbgen_switch;
|
||
|
fb_info.gen.info.updatevar = &fbgen_update_var;
|
||
|
fb_info.gen.info.blank = &fbgen_blank;
|
||
|
fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT;
|
||
|
|
||
|
/* This should give a reasonable default video mode */
|
||
|
fbgen_get_var(&disp.var, -1, &fb_info.gen.info);
|
||
|
fbgen_do_set_var(&disp.var, 1, &fb_info.gen);
|
||
|
fbgen_set_disp(-1, &fb_info.gen);
|
||
|
fbgen_install_cmap(0, &fb_info.gen);
|
||
|
if (register_framebuffer(&fb_info.gen.info) < 0)
|
||
|
return -EINVAL;
|
||
|
printk(KERN_INFO "fb%d: %s frame buffer device\n",
|
||
|
GET_FB_IDX(fb_info.gen.info.node),
|
||
|
fb_info.gen.info.modename);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
void au1100fb_cleanup(struct fb_info *info)
|
||
|
{
|
||
|
unregister_framebuffer(info);
|
||
|
}
|
||
|
|
||
|
|
||
|
void au1100fb_setup(char *options, int *ints)
|
||
|
{
|
||
|
char* this_opt;
|
||
|
int i;
|
||
|
int num_panels = sizeof(panels)/sizeof(struct known_lcd_panels);
|
||
|
|
||
|
|
||
|
if (!options || !*options)
|
||
|
return;
|
||
|
|
||
|
for(this_opt=strtok(options, ","); this_opt;
|
||
|
this_opt=strtok(NULL, ",")) {
|
||
|
if (!strncmp(this_opt, "panel:", 6)) {
|
||
|
#if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100)
|
||
|
/* Read Pb1100 Switch S10 ? */
|
||
|
if (!strncmp(this_opt+6, "s10", 3))
|
||
|
{
|
||
|
int panel;
|
||
|
panel = *(volatile int *)0xAE000008; /* BCSR SWITCHES */
|
||
|
panel >>= 8;
|
||
|
panel &= 0x0F;
|
||
|
if (panel >= num_panels) panel = 0;
|
||
|
my_lcd_index = panel;
|
||
|
}
|
||
|
else
|
||
|
#endif
|
||
|
/* Get the panel name, everything else if fixed */
|
||
|
for (i=0; i<num_panels; i++) {
|
||
|
if (!strncmp(this_opt+6, panels[i].panel_name,
|
||
|
strlen(this_opt))) {
|
||
|
my_lcd_index = i;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
else if (!strncmp(this_opt, "nohwcursor", 10)) {
|
||
|
printk("nohwcursor\n");
|
||
|
fb_info.nohwcursor = 1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
printk("au1100fb: Panel %d %s\n", my_lcd_index,
|
||
|
panels[my_lcd_index].panel_name);
|
||
|
}
|
||
|
|
||
|
|
||
|
|
||
|
#ifdef MODULE
|
||
|
MODULE_LICENSE("GPL");
|
||
|
int init_module(void)
|
||
|
{
|
||
|
return au1100fb_init();
|
||
|
}
|
||
|
|
||
|
void cleanup_module(void)
|
||
|
{
|
||
|
au1100fb_cleanup(void);
|
||
|
}
|
||
|
|
||
|
MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>");
|
||
|
MODULE_DESCRIPTION("Au1100 LCD framebuffer device driver");
|
||
|
#endif /* MODULE */
|