[mirror_ubuntu-artful-kernel.git] / arch / mips / au1000 / common / prom.c

/*
 *
 * BRIEF MODULE DESCRIPTION
 *    PROM library initialisation code, supports YAMON and U-Boot.
 *
 * Copyright 2000, 2001, 2006 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *         	ppopov@mvista.com or source@mvista.com
 *
 * This file was derived from Carsten Langgaard's
 * arch/mips/mips-boards/xx files.
 *
 * Carsten Langgaard, carstenl@mips.com
 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
 *
 *  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/init.h>
#include <linux/string.h>

#include <asm/bootinfo.h>

/* #define DEBUG_CMDLINE */

extern int prom_argc;
extern char **prom_argv, **prom_envp;


char * __init_or_module prom_getcmdline(void)
{
	return &(arcs_cmdline[0]);
}

void  prom_init_cmdline(void)
{
	char *cp;
	int actr;

	actr = 1; /* Always ignore argv[0] */

	cp = &(arcs_cmdline[0]);
	while(actr < prom_argc) {
	        strcpy(cp, prom_argv[actr]);
		cp += strlen(prom_argv[actr]);
		*cp++ = ' ';
		actr++;
	}
	if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
		--cp;
	if (prom_argc > 1)
		*cp = '\0';

}


char *prom_getenv(char *envname)
{
	/*
	 * Return a pointer to the given environment variable.
	 * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
	 */

	char **env = prom_envp;
	int i = strlen(envname);
	int yamon = (*env && strchr(*env, '=') == NULL);

	while (*env) {
		if (yamon) {
			if (strcmp(envname, *env++) == 0)
				return *env;
		} else {
			if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
				return *env + i + 1;
		}
		env++;
	}
	return NULL;
}

inline unsigned char str2hexnum(unsigned char c)
{
	if(c >= '0' && c <= '9')
		return c - '0';
	if(c >= 'a' && c <= 'f')
		return c - 'a' + 10;
	if(c >= 'A' && c <= 'F')
		return c - 'A' + 10;
	return 0; /* foo */
}

inline void str2eaddr(unsigned char *ea, unsigned char *str)
{
	int i;

	for(i = 0; i < 6; i++) {
		unsigned char num;

		if((*str == '.') || (*str == ':'))
			str++;
		num = str2hexnum(*str++) << 4;
		num |= (str2hexnum(*str++));
		ea[i] = num;
	}
}

int get_ethernet_addr(char *ethernet_addr)
{
        char *ethaddr_str;

        ethaddr_str = prom_getenv("ethaddr");
	if (!ethaddr_str) {
	        printk("ethaddr not set in boot prom\n");
		return -1;
	}
	str2eaddr(ethernet_addr, ethaddr_str);

#if 0
	{
		int i;

	printk("get_ethernet_addr: ");
	for (i=0; i<5; i++)
		printk("%02x:", (unsigned char)*(ethernet_addr+i));
	printk("%02x\n", *(ethernet_addr+i));
	}
#endif

	return 0;
}

unsigned long __init prom_free_prom_memory(void)
{
	return 0;
}

EXPORT_SYMBOL(prom_getcmdline);
EXPORT_SYMBOL(get_ethernet_addr);
EXPORT_SYMBOL(str2eaddr);
Commit	Line	Data
1da177e4 LT	1	/*
	2	*
	3	* BRIEF MODULE DESCRIPTION
6fe725c0	4	* PROM library initialisation code, supports YAMON and U-Boot.
1da177e4	5	*
fef6d6a7	6	* Copyright 2000, 2001, 2006 MontaVista Software Inc.
1da177e4 LT	7	* Author: MontaVista Software, Inc.
	8	* ppopov@mvista.com or source@mvista.com
	9	*
	10	* This file was derived from Carsten Langgaard's
	11	* arch/mips/mips-boards/xx files.
	12	*
	13	* Carsten Langgaard, carstenl@mips.com
	14	* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
	15	*
	16	* This program is free software; you can redistribute it and/or modify it
	17	* under the terms of the GNU General Public License as published by the
	18	* Free Software Foundation; either version 2 of the License, or (at your
	19	* option) any later version.
	20	*
	21	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	22	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	23	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	24	* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	25	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	26	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	27	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	28	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	29	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	30	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	31	*
	32	* You should have received a copy of the GNU General Public License along
	33	* with this program; if not, write to the Free Software Foundation, Inc.,
	34	* 675 Mass Ave, Cambridge, MA 02139, USA.
	35	*/
	36
	37	#include <linux/module.h>
	38	#include <linux/kernel.h>
	39	#include <linux/init.h>
	40	#include <linux/string.h>
	41
	42	#include <asm/bootinfo.h>
	43
	44	/* #define DEBUG_CMDLINE */
	45
	46	extern int prom_argc;
	47	extern char prom_argv, prom_envp;
	48
1da177e4	49
c21e6d65	50	char * __init_or_module prom_getcmdline(void)
1da177e4 LT	51	{
	52	return &(arcs_cmdline[0]);
	53	}
	54
	55	void prom_init_cmdline(void)
	56	{
	57	char *cp;
	58	int actr;
	59
	60	actr = 1; /* Always ignore argv[0] */
	61
	62	cp = &(arcs_cmdline[0]);
	63	while(actr < prom_argc) {
	64	strcpy(cp, prom_argv[actr]);
	65	cp += strlen(prom_argv[actr]);
	66	*cp++ = ' ';
	67	actr++;
	68	}
	69	if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
	70	--cp;
57e3e3b9 PP	71	if (prom_argc > 1)
57e3e3b9 PP	72	*cp = '\0';
1da177e4 LT	73
	74	}
	75
	76
	77	char prom_getenv(char envname)
	78	{
	79	/*
	80	* Return a pointer to the given environment variable.
6fe725c0	81	* YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
1da177e4 LT	82	*/
1da177e4 LT	83
6fe725c0 DP	84	char **env = prom_envp;
	85	int i = strlen(envname);
	86	int yamon = (env && strchr(env, '=') == NULL);
	87
	88	while (*env) {
	89	if (yamon) {
	90	if (strcmp(envname, *env++) == 0)
	91	return *env;
	92	} else {
	93	if (strncmp(envname, env, i) == 0 && (env)[i] == '=')
	94	return *env + i + 1;
	95	}
1da177e4 LT	96	env++;
1da177e4 LT	97	}
fef6d6a7	98	return NULL;
1da177e4 LT	99	}
	100
	101	inline unsigned char str2hexnum(unsigned char c)
	102	{
	103	if(c >= '0' && c <= '9')
	104	return c - '0';
	105	if(c >= 'a' && c <= 'f')
	106	return c - 'a' + 10;
	107	if(c >= 'A' && c <= 'F')
	108	return c - 'A' + 10;
	109	return 0; /* foo */
	110	}
	111
	112	inline void str2eaddr(unsigned char ea, unsigned char str)
	113	{
	114	int i;
	115
	116	for(i = 0; i < 6; i++) {
	117	unsigned char num;
	118
	119	if((str == '.') \|\| (str == ':'))
	120	str++;
	121	num = str2hexnum(*str++) << 4;
	122	num \|= (str2hexnum(*str++));
	123	ea[i] = num;
	124	}
	125	}
	126
	127	int get_ethernet_addr(char *ethernet_addr)
	128	{
	129	char *ethaddr_str;
	130
	131	ethaddr_str = prom_getenv("ethaddr");
	132	if (!ethaddr_str) {
	133	printk("ethaddr not set in boot prom\n");
	134	return -1;
	135	}
	136	str2eaddr(ethernet_addr, ethaddr_str);
	137
	138	#if 0
	139	{
	140	int i;
	141
	142	printk("get_ethernet_addr: ");
	143	for (i=0; i<5; i++)
	144	printk("%02x:", (unsigned char)*(ethernet_addr+i));
	145	printk("%02x\n", *(ethernet_addr+i));
	146	}
	147	#endif
	148
	149	return 0;
	150	}
	151
	152	unsigned long __init prom_free_prom_memory(void)
	153	{
	154	return 0;
	155	}
	156
	157	EXPORT_SYMBOL(prom_getcmdline);
	158	EXPORT_SYMBOL(get_ethernet_addr);
	159	EXPORT_SYMBOL(str2eaddr);