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

/*
 *
 * BRIEF MODULE DESCRIPTION
 *    PROM library initialisation code, supports YAMON and U-Boot.
 *
 * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
 * Author: MontaVista Software, Inc. <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/init.h>
#include <linux/string.h>

#include <asm/bootinfo.h>

int prom_argc;
char **prom_argv;
char **prom_envp;

void __init prom_init_cmdline(void)
{
	int i;

	for (i = 1; i < prom_argc; i++) {
		strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
		if (i < (prom_argc - 1))
			strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
	}
}

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;
}

static 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 */
}

static 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 __init prom_get_ethernet_addr(char *ethernet_addr)
{
	char *ethaddr_str;

	/* Check the environment variables first */
	ethaddr_str = prom_getenv("ethaddr");
	if (!ethaddr_str) {
		/* Check command line */
		ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
		if (!ethaddr_str)
			return -1;

		ethaddr_str += strlen("ethaddr=");
	}

	str2eaddr(ethernet_addr, ethaddr_str);

	return 0;
}

void __init prom_free_prom_memory(void)
{
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	*
	3	* BRIEF MODULE DESCRIPTION
6fe725c0	4	* PROM library initialisation code, supports YAMON and U-Boot.
1da177e4	5	*
c1dcb14e SS	6	* Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
c1dcb14e SS	7	* Author: MontaVista Software, Inc. <source@mvista.com>
1da177e4 LT	8	*
	9	* This file was derived from Carsten Langgaard's
	10	* arch/mips/mips-boards/xx files.
	11	*
	12	* Carsten Langgaard, carstenl@mips.com
	13	* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
	14	*
	15	* This program is free software; you can redistribute it and/or modify it
	16	* under the terms of the GNU General Public License as published by the
	17	* Free Software Foundation; either version 2 of the License, or (at your
	18	* option) any later version.
	19	*
	20	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	21	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	22	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	23	* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	24	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	25	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	26	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	27	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	29	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	30	*
	31	* You should have received a copy of the GNU General Public License along
	32	* with this program; if not, write to the Free Software Foundation, Inc.,
	33	* 675 Mass Ave, Cambridge, MA 02139, USA.
	34	*/
ce28f94c	35
1da177e4 LT	36	#include <linux/init.h>
	37	#include <linux/string.h>
	38
	39	#include <asm/bootinfo.h>
	40
25b31cb1 YY	41	int prom_argc;
	42	char **prom_argv;
	43	char **prom_envp;
1da177e4	44
2b877a3f	45	void __init prom_init_cmdline(void)
1da177e4	46	{
10229f37	47	int i;
1da177e4	48
10229f37 YY	49	for (i = 1; i < prom_argc; i++) {
	50	strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
	51	if (i < (prom_argc - 1))
	52	strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
1da177e4	53	}
1da177e4 LT	54	}
1da177e4 LT	55
1da177e4 LT	56	char prom_getenv(char envname)
	57	{
	58	/*
	59	* Return a pointer to the given environment variable.
6fe725c0	60	* YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
1da177e4 LT	61	*/
1da177e4 LT	62
6fe725c0 DP	63	char **env = prom_envp;
	64	int i = strlen(envname);
	65	int yamon = (env && strchr(env, '=') == NULL);
	66
	67	while (*env) {
	68	if (yamon) {
	69	if (strcmp(envname, *env++) == 0)
	70	return *env;
c1dcb14e SS	71	} else if (strncmp(envname, env, i) == 0 && (env)[i] == '=')
c1dcb14e SS	72	return *env + i + 1;
1da177e4 LT	73	env++;
1da177e4 LT	74	}
25b31cb1	75
fef6d6a7	76	return NULL;
1da177e4 LT	77	}
1da177e4 LT	78
2de88923	79	static inline unsigned char str2hexnum(unsigned char c)
1da177e4	80	{
25b31cb1	81	if (c >= '0' && c <= '9')
1da177e4	82	return c - '0';
25b31cb1	83	if (c >= 'a' && c <= 'f')
1da177e4	84	return c - 'a' + 10;
25b31cb1	85	if (c >= 'A' && c <= 'F')
1da177e4	86	return c - 'A' + 10;
25b31cb1	87
1da177e4 LT	88	return 0; /* foo */
	89	}
	90
2de88923	91	static inline void str2eaddr(unsigned char ea, unsigned char str)
1da177e4 LT	92	{
	93	int i;
	94
c1dcb14e	95	for (i = 0; i < 6; i++) {
1da177e4 LT	96	unsigned char num;
1da177e4 LT	97
c1dcb14e	98	if ((str == '.') \|\| (str == ':'))
1da177e4	99	str++;
c1dcb14e SS	100	num = str2hexnum(*str++) << 4;
c1dcb14e SS	101	num \|= str2hexnum(*str++);
1da177e4 LT	102	ea[i] = num;
	103	}
	104	}
	105
2b877a3f	106	int __init prom_get_ethernet_addr(char *ethernet_addr)
1da177e4	107	{
2de88923	108	char *ethaddr_str;
1da177e4	109
2de88923 YY	110	/* Check the environment variables first */
2de88923 YY	111	ethaddr_str = prom_getenv("ethaddr");
1da177e4	112	if (!ethaddr_str) {
2de88923	113	/* Check command line */
ae7cbef5	114	ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
2de88923 YY	115	if (!ethaddr_str)
2de88923 YY	116	return -1;
1da177e4	117
2de88923	118	ethaddr_str += strlen("ethaddr=");
1da177e4	119	}
2de88923 YY	120
2de88923 YY	121	str2eaddr(ethernet_addr, ethaddr_str);
1da177e4 LT	122
	123	return 0;
	124	}
	125
c44e8d5e	126	void __init prom_free_prom_memory(void)
1da177e4	127	{
1da177e4	128	}