mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 18:41:03 +00:00
262 lines
7.6 KiB
C
262 lines
7.6 KiB
C
/*
|
|
* (C) Copyright 2004
|
|
* Pierre Aubert, Staubli Faverges , <p.aubert@staubli.com>
|
|
* Copyright 2011 Freescale Semiconductor, Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
/************************************************************************
|
|
Get Parameters for the video mode:
|
|
The default video mode can be defined in CONFIG_SYS_DEFAULT_VIDEO_MODE.
|
|
If undefined, default video mode is set to 0x301
|
|
Parameters can be set via the variable "videomode" in the environment.
|
|
2 diferent ways are possible:
|
|
"videomode=301" - 301 is a hexadecimal number describing the VESA
|
|
mode. Following modes are implemented:
|
|
|
|
Colors 640x480 800x600 1024x768 1152x864 1280x1024
|
|
--------+---------------------------------------------
|
|
8 bits | 0x301 0x303 0x305 0x161 0x307
|
|
15 bits | 0x310 0x313 0x316 0x162 0x319
|
|
16 bits | 0x311 0x314 0x317 0x163 0x31A
|
|
24 bits | 0x312 0x315 0x318 ? 0x31B
|
|
--------+---------------------------------------------
|
|
"videomode=bootargs"
|
|
- the parameters are parsed from the bootargs.
|
|
The format is "NAME:VALUE,NAME:VALUE" etc.
|
|
Ex.:
|
|
"bootargs=video=ctfb:x:800,y:600,depth:16,pclk:25000"
|
|
Parameters not included in the list will be taken from
|
|
the default mode, which is one of the following:
|
|
mode:0 640x480x24
|
|
mode:1 800x600x16
|
|
mode:2 1024x768x8
|
|
mode:3 960x720x24
|
|
mode:4 1152x864x16
|
|
mode:5 1280x1024x8
|
|
|
|
if "mode" is not provided within the parameter list,
|
|
mode:0 is assumed.
|
|
Following parameters are supported:
|
|
x xres = visible resolution horizontal
|
|
y yres = visible resolution vertical
|
|
pclk pixelclocks in pico sec
|
|
le left_marging time from sync to picture in pixelclocks
|
|
ri right_marging time from picture to sync in pixelclocks
|
|
up upper_margin time from sync to picture
|
|
lo lower_margin
|
|
hs hsync_len length of horizontal sync
|
|
vs vsync_len length of vertical sync
|
|
sync see FB_SYNC_*
|
|
vmode see FB_VMODE_*
|
|
depth Color depth in bits per pixel
|
|
All other parameters in the variable bootargs are ignored.
|
|
It is also possible to set the parameters direct in the
|
|
variable "videomode", or in another variable i.e.
|
|
"myvideo" and setting the variable "videomode=myvideo"..
|
|
****************************************************************************/
|
|
|
|
#include <common.h>
|
|
#include <linux/ctype.h>
|
|
|
|
#include "videomodes.h"
|
|
|
|
const struct ctfb_vesa_modes vesa_modes[VESA_MODES_COUNT] = {
|
|
{0x301, RES_MODE_640x480, 8},
|
|
{0x310, RES_MODE_640x480, 15},
|
|
{0x311, RES_MODE_640x480, 16},
|
|
{0x312, RES_MODE_640x480, 24},
|
|
{0x303, RES_MODE_800x600, 8},
|
|
{0x313, RES_MODE_800x600, 15},
|
|
{0x314, RES_MODE_800x600, 16},
|
|
{0x315, RES_MODE_800x600, 24},
|
|
{0x305, RES_MODE_1024x768, 8},
|
|
{0x316, RES_MODE_1024x768, 15},
|
|
{0x317, RES_MODE_1024x768, 16},
|
|
{0x318, RES_MODE_1024x768, 24},
|
|
{0x161, RES_MODE_1152x864, 8},
|
|
{0x162, RES_MODE_1152x864, 15},
|
|
{0x163, RES_MODE_1152x864, 16},
|
|
{0x307, RES_MODE_1280x1024, 8},
|
|
{0x319, RES_MODE_1280x1024, 15},
|
|
{0x31A, RES_MODE_1280x1024, 16},
|
|
{0x31B, RES_MODE_1280x1024, 24},
|
|
};
|
|
const struct ctfb_res_modes res_mode_init[RES_MODES_COUNT] = {
|
|
/* x y pixclk le ri up lo hs vs s vmode */
|
|
{640, 480, 39721, 40, 24, 32, 11, 96, 2, 0, FB_VMODE_NONINTERLACED},
|
|
{800, 600, 27778, 64, 24, 22, 1, 72, 2, 0, FB_VMODE_NONINTERLACED},
|
|
{1024, 768, 15384, 168, 8, 29, 3, 144, 4, 0, FB_VMODE_NONINTERLACED},
|
|
{960, 720, 13100, 160, 40, 32, 8, 80, 4, 0, FB_VMODE_NONINTERLACED},
|
|
{1152, 864, 12004, 200, 64, 32, 16, 80, 4, 0, FB_VMODE_NONINTERLACED},
|
|
{1280, 1024, 9090, 200, 48, 26, 1, 184, 3, 0, FB_VMODE_NONINTERLACED},
|
|
};
|
|
|
|
/************************************************************************
|
|
* Get Parameters for the video mode:
|
|
*/
|
|
/*********************************************************************
|
|
* returns the length to the next seperator
|
|
*/
|
|
static int
|
|
video_get_param_len (char *start, char sep)
|
|
{
|
|
int i = 0;
|
|
while ((*start != 0) && (*start != sep)) {
|
|
start++;
|
|
i++;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static int
|
|
video_search_param (char *start, char *param)
|
|
{
|
|
int len, totallen, i;
|
|
char *p = start;
|
|
len = strlen (param);
|
|
totallen = len + strlen (start);
|
|
for (i = 0; i < totallen; i++) {
|
|
if (strncmp (p++, param, len) == 0)
|
|
return (i);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/***************************************************************
|
|
* Get parameter via the environment as it is done for the
|
|
* linux kernel i.e:
|
|
* video=ctfb:x:800,xv:1280,y:600,yv:1024,depth:16,mode:0,pclk:25000,
|
|
* le:56,ri:48,up:26,lo:5,hs:152,vs:2,sync:0,vmode:0,accel:0
|
|
*
|
|
* penv is a pointer to the environment, containing the string, or the name of
|
|
* another environment variable. It could even be the term "bootargs"
|
|
*/
|
|
|
|
#define GET_OPTION(name,var) \
|
|
if(strncmp(p,name,strlen(name))==0) { \
|
|
val_s=p+strlen(name); \
|
|
var=simple_strtoul(val_s, NULL, 10); \
|
|
}
|
|
|
|
int video_get_params (struct ctfb_res_modes *pPar, char *penv)
|
|
{
|
|
char *p, *s, *val_s;
|
|
int i = 0;
|
|
int bpp;
|
|
int mode;
|
|
|
|
/* first search for the environment containing the real param string */
|
|
s = penv;
|
|
|
|
if ((p = getenv (s)) != NULL)
|
|
s = p;
|
|
|
|
/*
|
|
* in case of the bootargs line, we have to start
|
|
* after "video=ctfb:"
|
|
*/
|
|
i = video_search_param (s, "video=ctfb:");
|
|
if (i >= 0) {
|
|
s += i;
|
|
s += strlen ("video=ctfb:");
|
|
}
|
|
/* search for mode as a default value */
|
|
p = s;
|
|
mode = 0; /* default */
|
|
|
|
while ((i = video_get_param_len (p, ',')) != 0) {
|
|
GET_OPTION ("mode:", mode)
|
|
p += i;
|
|
if (*p != 0)
|
|
p++; /* skip ',' */
|
|
}
|
|
|
|
if (mode >= RES_MODES_COUNT)
|
|
mode = 0;
|
|
|
|
*pPar = res_mode_init[mode]; /* copy default values */
|
|
bpp = 24 - ((mode % 3) * 8);
|
|
p = s; /* restart */
|
|
|
|
while ((i = video_get_param_len (p, ',')) != 0) {
|
|
GET_OPTION ("x:", pPar->xres)
|
|
GET_OPTION ("y:", pPar->yres)
|
|
GET_OPTION ("le:", pPar->left_margin)
|
|
GET_OPTION ("ri:", pPar->right_margin)
|
|
GET_OPTION ("up:", pPar->upper_margin)
|
|
GET_OPTION ("lo:", pPar->lower_margin)
|
|
GET_OPTION ("hs:", pPar->hsync_len)
|
|
GET_OPTION ("vs:", pPar->vsync_len)
|
|
GET_OPTION ("sync:", pPar->sync)
|
|
GET_OPTION ("vmode:", pPar->vmode)
|
|
GET_OPTION ("pclk:", pPar->pixclock)
|
|
GET_OPTION ("depth:", bpp)
|
|
p += i;
|
|
if (*p != 0)
|
|
p++; /* skip ',' */
|
|
}
|
|
return bpp;
|
|
}
|
|
|
|
/*
|
|
* Parse the 'video-mode' environment variable
|
|
*
|
|
* Example: "video-mode=fslfb:1280x1024-32@60,monitor=dvi". See
|
|
* doc/README.video for more information on how to set the variable.
|
|
*
|
|
* @xres: returned value of X-resolution
|
|
* @yres: returned value of Y-resolution
|
|
* @depth: returned value of color depth
|
|
* @freq: returned value of monitor frequency
|
|
* @options: pointer to any remaining options, or NULL
|
|
*
|
|
* Returns 1 if valid values were found, 0 otherwise
|
|
*/
|
|
int video_get_video_mode(unsigned int *xres, unsigned int *yres,
|
|
unsigned int *depth, unsigned int *freq, const char **options)
|
|
{
|
|
char *p = getenv("video-mode");
|
|
if (!p)
|
|
return 0;
|
|
|
|
/* Skip over the driver name, which we don't care about. */
|
|
p = strchr(p, ':');
|
|
if (!p)
|
|
return 0;
|
|
|
|
/* Get the X-resolution*/
|
|
while (*p && !isdigit(*p))
|
|
p++;
|
|
*xres = simple_strtoul(p, &p, 10);
|
|
if (!*xres)
|
|
return 0;
|
|
|
|
/* Get the Y-resolution */
|
|
while (*p && !isdigit(*p))
|
|
p++;
|
|
*yres = simple_strtoul(p, &p, 10);
|
|
if (!*yres)
|
|
return 0;
|
|
|
|
/* Get the depth */
|
|
while (*p && !isdigit(*p))
|
|
p++;
|
|
*depth = simple_strtoul(p, &p, 10);
|
|
if (!*depth)
|
|
return 0;
|
|
|
|
/* Get the frequency */
|
|
while (*p && !isdigit(*p))
|
|
p++;
|
|
*freq = simple_strtoul(p, &p, 10);
|
|
if (!*freq)
|
|
return 0;
|
|
|
|
/* Find the extra options, if any */
|
|
p = strchr(p, ',');
|
|
*options = p ? p + 1 : NULL;
|
|
|
|
return 1;
|
|
}
|