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linux/drivers/video/au1100fb.c

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/*
* BRIEF MODULE DESCRIPTION
* Au1100 LCD Driver.
*
* Copyright 2002 MontaVista Software
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* Copyright 2002 Alchemy Semiconductor
* Author: Alchemy Semiconductor
*
* Based on:
* linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
* Created 28 Dec 1997 by Geert Uytterhoeven
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/au1000.h>
#include <asm/pb1100.h>
#include "au1100fb.h"
#include <video/fbcon.h>
#include <video/fbcon-mfb.h>
#include <video/fbcon-cfb2.h>
#include <video/fbcon-cfb4.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
/*
* Sanity check. If this is a new Au1100 based board, search for
* the PB1100 ifdefs to make sure you modify the code accordingly.
*/
#if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100) || defined(CONFIG_MIPS_HYDROGEN3)
#else
error Unknown Au1100 board
#endif
#define CMAPSIZE 16
static int my_lcd_index; /* default is zero */
struct known_lcd_panels *p_lcd;
AU1100_LCD *p_lcd_reg = (AU1100_LCD *)AU1100_LCD_ADDR;
struct au1100fb_info {
struct fb_info_gen gen;
unsigned long fb_virt_start;
unsigned long fb_size;
unsigned long fb_phys;
int mmaped;
int nohwcursor;
struct { unsigned red, green, blue, pad; } palette[256];
#if defined(FBCON_HAS_CFB16)
u16 fbcon_cmap16[16];
#endif
};
struct au1100fb_par {
struct fb_var_screeninfo var;
int line_length; // in bytes
int cmap_len; // color-map length
};
static struct au1100fb_info fb_info;
static struct au1100fb_par current_par;
static struct display disp;
int au1100fb_init(void);
void au1100fb_setup(char *options, int *ints);
static int au1100fb_mmap(struct fb_info *fb, struct file *file,
struct vm_area_struct *vma);
static int au1100_blank(int blank_mode, struct fb_info_gen *info);
static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
u_long arg, int con, struct fb_info *info);
void au1100_nocursor(struct display *p, int mode, int xx, int yy){};
static struct fb_ops au1100fb_ops = {
owner: THIS_MODULE,
fb_get_fix: fbgen_get_fix,
fb_get_var: fbgen_get_var,
fb_set_var: fbgen_set_var,
fb_get_cmap: fbgen_get_cmap,
fb_set_cmap: fbgen_set_cmap,
fb_pan_display: fbgen_pan_display,
fb_ioctl: au1100fb_ioctl,
fb_mmap: au1100fb_mmap,
};
static void au1100_detect(void)
{
/*
* This function should detect the current video mode settings
* and store it as the default video mode
*/
/*
* Yeh, well, we're not going to change any settings so we're
* always stuck with the default ...
*/
}
static int au1100_encode_fix(struct fb_fix_screeninfo *fix,
const void *_par, struct fb_info_gen *_info)
{
struct au1100fb_info *info = (struct au1100fb_info *) _info;
struct au1100fb_par *par = (struct au1100fb_par *) _par;
struct fb_var_screeninfo *var = &par->var;
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
fix->smem_start = info->fb_phys;
fix->smem_len = info->fb_size;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
fix->visual = (var->bits_per_pixel == 8) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
fix->ywrapstep = 0;
fix->xpanstep = 1;
fix->ypanstep = 1;
fix->line_length = current_par.line_length;
return 0;
}
static void set_color_bitfields(struct fb_var_screeninfo *var)
{
switch (var->bits_per_pixel) {
case 8:
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 0;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 16: /* RGB 565 */
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
break;
}
var->red.msb_right = 0;
var->green.msb_right = 0;
var->blue.msb_right = 0;
var->transp.msb_right = 0;
}
static int au1100_decode_var(const struct fb_var_screeninfo *var,
void *_par, struct fb_info_gen *_info)
{
struct au1100fb_par *par = (struct au1100fb_par *)_par;
/*
* Don't allow setting any of these yet: xres and yres don't
* make sense for LCD panels.
*/
if (var->xres != p_lcd->xres ||
var->yres != p_lcd->yres ||
var->xres != p_lcd->xres ||
var->yres != p_lcd->yres) {
return -EINVAL;
}
if(var->bits_per_pixel != p_lcd->bpp) {
return -EINVAL;
}
memset(par, 0, sizeof(struct au1100fb_par));
par->var = *var;
/* FIXME */
switch (var->bits_per_pixel) {
case 8:
par->var.bits_per_pixel = 8;
break;
case 16:
par->var.bits_per_pixel = 16;
break;
default:
printk("color depth %d bpp not supported\n",
var->bits_per_pixel);
return -EINVAL;
}
set_color_bitfields(&par->var);
par->cmap_len = (par->var.bits_per_pixel == 8) ? 256 : 16;
return 0;
}
static int au1100_encode_var(struct fb_var_screeninfo *var,
const void *par, struct fb_info_gen *_info)
{
*var = ((struct au1100fb_par *)par)->var;
return 0;
}
static void
au1100_get_par(void *_par, struct fb_info_gen *_info)
{
*(struct au1100fb_par *)_par = current_par;
}
static void au1100_set_par(const void *par, struct fb_info_gen *info)
{
/* nothing to do: we don't change any settings */
}
static int au1100_getcolreg(unsigned regno, unsigned *red, unsigned *green,
unsigned *blue, unsigned *transp,
struct fb_info *info)
{
struct au1100fb_info* i = (struct au1100fb_info*)info;
if (regno > 255)
return 1;
*red = i->palette[regno].red;
*green = i->palette[regno].green;
*blue = i->palette[regno].blue;
*transp = 0;
return 0;
}
static int au1100_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct au1100fb_info* i = (struct au1100fb_info *)info;
u32 rgbcol;
if (regno > 255)
return 1;
i->palette[regno].red = red;
i->palette[regno].green = green;
i->palette[regno].blue = blue;
switch(p_lcd->bpp) {
#ifdef FBCON_HAS_CFB8
case 8:
red >>= 10;
green >>= 10;
blue >>= 10;
p_lcd_reg->lcd_pallettebase[regno] = (blue&0x1f) |
((green&0x3f)<<5) | ((red&0x1f)<<11);
break;
#endif
#ifdef FBCON_HAS_CFB16
case 16:
i->fbcon_cmap16[regno] =
((red & 0xf800) >> 0) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
#endif
default:
break;
}
return 0;
}
static int au1100_blank(int blank_mode, struct fb_info_gen *_info)
{
switch (blank_mode) {
case VESA_NO_BLANKING:
/* turn on panel */
//printk("turn on panel\n");
#ifdef CONFIG_MIPS_PB1100
p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
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
au_sync();
break;
case VESA_VSYNC_SUSPEND:
case VESA_HSYNC_SUSPEND:
case VESA_POWERDOWN:
/* turn off panel */
//printk("turn off panel\n");
#ifdef CONFIG_MIPS_PB1100
au_writew(au_readw(PB1100_G_CONTROL) & ~p_lcd->mode_backlight,
PB1100_G_CONTROL);
p_lcd_reg->lcd_control &= ~LCD_CONTROL_GO;
#endif
au_sync();
break;
default:
break;
}
return 0;
}
static void au1100_set_disp(const void *unused, struct display *disp,
struct fb_info_gen *info)
{
disp->screen_base = (char *)fb_info.fb_virt_start;
switch (disp->var.bits_per_pixel) {
#ifdef FBCON_HAS_CFB8
case 8:
disp->dispsw = &fbcon_cfb8;
if (fb_info.nohwcursor)
fbcon_cfb8.cursor = au1100_nocursor;
break;
#endif
#ifdef FBCON_HAS_CFB16
case 16:
disp->dispsw = &fbcon_cfb16;
disp->dispsw_data = fb_info.fbcon_cmap16;
if (fb_info.nohwcursor)
fbcon_cfb16.cursor = au1100_nocursor;
break;
#endif
default:
disp->dispsw = &fbcon_dummy;
disp->dispsw_data = NULL;
break;
}
}
static int
au1100fb_mmap(struct fb_info *_fb,
struct file *file,
struct vm_area_struct *vma)
{
unsigned int len;
unsigned long start=0, off;
struct au1100fb_info *fb = (struct au1100fb_info *)_fb;
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
return -EINVAL;
}
start = fb_info.fb_phys & PAGE_MASK;
len = PAGE_ALIGN((start & ~PAGE_MASK) + fb_info.fb_size);
off = vma->vm_pgoff << PAGE_SHIFT;
if ((vma->vm_end - vma->vm_start + off) > len) {
return -EINVAL;
}
off += start;
vma->vm_pgoff = off >> PAGE_SHIFT;
pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
//pgprot_val(vma->vm_page_prot) |= _CACHE_CACHABLE_NONCOHERENT;
pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
/* This is an IO map - tell maydump to skip this VMA */
vma->vm_flags |= VM_IO;
if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
vma->vm_page_prot)) {
return -EAGAIN;
}
fb->mmaped = 1;
return 0;
}
int au1100_pan_display(const struct fb_var_screeninfo *var,
struct fb_info_gen *info)
{
return 0;
}
static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
u_long arg, int con, struct fb_info *info)
{
/* nothing to do yet */
return -EINVAL;
}
static struct fbgen_hwswitch au1100_switch = {
au1100_detect,
au1100_encode_fix,
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 */
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