* Patch by Pierre Aubert, 18 Mar 2004:

  - Unify video mode handling for Chips & Technologies 69000 Video
    chip and Silicon Motion SMI 712/710/810 Video chip
  - Add selection of the video output (CRT or LCD) via 'videoout'
    environment variable for the Silicon Motion
  - README update

* Patch by Pierre Aubert, 18 Mar 2004:
  include/common.h typo fix

* Patches by Tolunay Orkun, 17 Mar 2004:
  - Add support for bd->bi_iic_fast[] initialization via environment
    variable "i2cfast" (CONFIG_I2CFAST)
  - Add "i2cfast" u-boot environment variable support for csb272

1 files changed, 210 insertions, 0 deletions

diff --git a/drivers/videomodes.c b/drivers/videomodes.c
new file mode 100644
index 000000000..418f74c57
--- /dev/null
+++ b/drivers/videomodes.c
@@ -0,0 +1,210 @@
+/*
+ * (C) Copyright 2004
+ * Pierre Aubert, Staubli Faverges , <p.aubert@staubli.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/************************************************************************
+  Get Parameters for the video mode:
+  The default video mode can be defined in CFG_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 "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, t;
+	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;
+	t = 0;
+	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;
+}
+
+