arm: mx5: clock: add support for changing CPU clock via cmdline

[karo-tx-uboot.git] / drivers / video / videomodes.c

diff --git a/drivers/video/videomodes.c b/drivers/video/videomodes.c
index c81e5bc1416a55dbacb6f4f9b5b6d5a3c07182de..d459ef07e9d0f943fe66bb3eceea320ee4b0d51a 100644 (file)
--- a/drivers/video/videomodes.c
+++ b/drivers/video/videomodes.c
@@ -1,29 +1,14 @@
 /*
  * (C) Copyright 2004
  * Pierre Aubert, Staubli Faverges , <p.aubert@staubli.com>
+ * Copyright 2011 Freescale Semiconductor, Inc.
  *
- * 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
+ * SPDX-License-Identifier:    GPL-2.0+ 
  */
 
 /************************************************************************
   Get Parameters for the video mode:
-  The default video mode can be defined in CFG_DEFAULT_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:
@@ -73,6 +58,8 @@
 ****************************************************************************/
 
 #include <common.h>
+#include <linux/ctype.h>
+
 #include "videomodes.h"
 
 const struct ctfb_vesa_modes vesa_modes[VESA_MODES_COUNT] = {
@@ -156,15 +143,18 @@ video_search_param (char *start, char *param)
 int video_get_params (struct ctfb_res_modes *pPar, char *penv)
 {
        char *p, *s, *val_s;
-       int i = 0, t;
+       int i = 0;
        int bpp;
        int mode;
+
        /* first search for the environment containing the real param string */
        s = penv;
-       if ((p = getenv (s)) != NULL) {
+
+       if ((p = getenv (s)) != NULL)
                s = p;
-       }
-       /* in case of the bootargs line, we have to start
+
+       /*
+        * in case of the bootargs line, we have to start
         * after "video=ctfb:"
         */
        i = video_search_param (s, "video=ctfb:");
@@ -174,19 +164,22 @@ int video_get_params (struct ctfb_res_modes *pPar, char *penv)
        }
        /* 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)
@@ -206,3 +199,64 @@ int video_get_params (struct ctfb_res_modes *pPar, char *penv)
        }
        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;
+}