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  • 2020-06-01
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phy.c

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  • Forked from Reform / reform-boundary-uboot
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    sys_eeprom.c 6.09 KiB
    /*
     * Copyright 2006 Freescale Semiconductor
     * York Sun (yorksun@freescale.com)
     * Haiying Wang (haiying.wang@freescale.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
     */
    
    #include <common.h>
    #include <command.h>
    #include <i2c.h>
    #include <linux/ctype.h>
    
    typedef struct {
    	unsigned char id[4];		/* 0x0000 - 0x0003 */
    	unsigned char sn[12];		/* 0x0004 - 0x000F */
    	unsigned char errata[5];	/* 0x0010 - 0x0014 */
    	unsigned char date[7];		/* 0x0015 - 0x001a */
    	unsigned char res_1[37];	/* 0x001b - 0x003f */
    	unsigned char tab_size;		/* 0x0040 */
    	unsigned char tab_flag;		/* 0x0041 */
    	unsigned char mac[8][6];	/* 0x0042 - 0x0071 */
    	unsigned char res_2[126];	/* 0x0072 - 0x00ef */
    	unsigned int crc;		/* 0x00f0 - 0x00f3 crc32 checksum */
    } EEPROM_data;
    
    static EEPROM_data mac_data;
    
    int mac_show(void)
    {
    	int i;
    	unsigned char ethaddr[8][18];
    
    	printf("ID %c%c%c%c\n",
    	       mac_data.id[0],
    	       mac_data.id[1],
    	       mac_data.id[2],
    	       mac_data.id[3]);
    	printf("Errata %c%c%c%c%c\n",
    	       mac_data.errata[0],
    	       mac_data.errata[1],
    	       mac_data.errata[2],
    	       mac_data.errata[3],
    	       mac_data.errata[4]);
    	printf("Date %c%c%c%c%c%c%c\n",
    	       mac_data.date[0],
    	       mac_data.date[1],
    	       mac_data.date[2],
    	       mac_data.date[3],
    	       mac_data.date[4],
    	       mac_data.date[5],
    	       mac_data.date[6]);
    	for (i = 0; i < 8; i++) {
    		sprintf((char *)ethaddr[i],
    			"%02x:%02x:%02x:%02x:%02x:%02x",
    			mac_data.mac[i][0],
    			mac_data.mac[i][1],
    			mac_data.mac[i][2],
    			mac_data.mac[i][3],
    			mac_data.mac[i][4],
    			mac_data.mac[i][5]);
    		printf("MAC %d %s\n", i, ethaddr[i]);
    	}
    
    	setenv("ethaddr",  (char *)ethaddr[0]);
    	setenv("eth1addr", (char *)ethaddr[1]);
    	setenv("eth2addr", (char *)ethaddr[2]);
    	setenv("eth3addr", (char *)ethaddr[3]);
    
    	return 0;
    }
    
    int mac_read(void)
    {
    	int ret, length;
    	unsigned int crc = 0;
    	unsigned char dev = ID_EEPROM_ADDR, *data;
    
    	length = sizeof(EEPROM_data);
    	ret = i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length);
    	if (ret) {
    		printf("Read failed.\n");
    		return -1;
    	}
    
    	data = (unsigned char *)(&mac_data);
    	printf("Check CRC on reading ...");
    	crc = crc32(crc, data, length - 4);
    	if (crc != mac_data.crc) {
    		printf("CRC checksum is invalid, in EEPROM CRC is %x, calculated CRC is %x\n",
    		     mac_data.crc, crc);
    		return -1;
    	} else {
    		printf("CRC OK\n");
    		mac_show();
    	}
    	return 0;
    }
    
    int mac_prog(void)
    {
    	int ret, i, length;
    	unsigned int crc = 0;
    	unsigned char dev = ID_EEPROM_ADDR, *ptr;
    	unsigned char *eeprom_data = (unsigned char *)(&mac_data);
    
    	for (i = 0; i < sizeof(mac_data.res_1); i++)
    		mac_data.res_1[i] = 0;
    	for (i = 0; i < sizeof(mac_data.res_2); i++)
    		mac_data.res_2[i] = 0;
    	length = sizeof(EEPROM_data);
    	crc = crc32(crc, eeprom_data, length - 4);
    	mac_data.crc = crc;
    	for (i = 0, ptr = eeprom_data; i < length; i += 8, ptr += 8) {
    		ret =
    		    i2c_write(dev, i, 1, ptr,
    			      (length - i) < 8 ? (length - i) : 8);
    		udelay(5000);	/* 5ms write cycle timing */
    		if (ret)
    			break;
    	}
    	if (ret) {
    		printf("Programming failed.\n");
    		return -1;
    	} else {
    		printf("Programming %d bytes. Reading back ...\n", length);
    		mac_read();
    	}
    	return 0;
    }
    
    int do_mac(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
    {
    	int i;
    	char cmd = 's';
    	unsigned long long mac_val;
    
    	if (i2c_probe(ID_EEPROM_ADDR) != 0)
    		return -1;
    
    	if (argc > 1) {
    		cmd = argv[1][0];
    		switch (cmd) {
    		case 'r':	/* display */
    			mac_read();
    			break;
    		case 's':	/* save */
    			mac_prog();
    			break;
    		case 'i':	/* id */
    			for (i = 0; i < 4; i++) {
    				mac_data.id[i] = argv[2][i];
    			}
    			break;
    		case 'n':	/* serial number */
    			for (i = 0; i < 12; i++) {
    				mac_data.sn[i] = argv[2][i];
    			}
    			break;
    		case 'e':	/* errata */
    			for (i = 0; i < 5; i++) {
    				mac_data.errata[i] = argv[2][i];
    			}
    			break;
    		case 'd':	/* date */
    			for (i = 0; i < 7; i++) {
    				mac_data.date[i] = argv[2][i];
    			}
    			break;
    		case 'p':	/* number of ports */
    			mac_data.tab_size =
    			    (unsigned char)simple_strtoul(argv[2], NULL, 16);
    			break;
    		case '0':	/* mac 0 */
    		case '1':	/* mac 1 */
    		case '2':	/* mac 2 */
    		case '3':	/* mac 3 */
    		case '4':	/* mac 4 */
    		case '5':	/* mac 5 */
    		case '6':	/* mac 6 */
    		case '7':	/* mac 7 */
    			mac_val = simple_strtoull(argv[2], NULL, 16);
    			for (i = 0; i < 6; i++) {
    				mac_data.mac[cmd - '0'][i] =
    				    *((unsigned char *)
    				      (((unsigned int)(&mac_val)) + i + 2));
    			}
    			break;
    		case 'h':	/* help */
    		default:
    			printf("Usage:\n%s\n", cmdtp->usage);
    			break;
    		}
    	} else {
    		mac_show();
    	}
    	return 0;
    }
    
    int mac_read_from_eeprom(void)
    {
    	int length, i;
    	unsigned char dev = ID_EEPROM_ADDR;
    	unsigned char *data;
    	unsigned char ethaddr[4][18];
    	unsigned char enetvar[32];
    	unsigned int crc = 0;
    
    	length = sizeof(EEPROM_data);
    	if (i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length)) {
    		printf("Read failed.\n");
    		return -1;
    	}
    
    	data = (unsigned char *)(&mac_data);
    	crc = crc32(crc, data, length - 4);
    	if (crc != mac_data.crc) {
    		return -1;
    	} else {
    		for (i = 0; i < 4; i++) {
    			if (memcmp(&mac_data.mac[i], "\0\0\0\0\0\0", 6)) {
    				sprintf((char *)ethaddr[i],
    					"%02x:%02x:%02x:%02x:%02x:%02x",
    					mac_data.mac[i][0],
    					mac_data.mac[i][1],
    					mac_data.mac[i][2],
    					mac_data.mac[i][3],
    					mac_data.mac[i][4],
    					mac_data.mac[i][5]);
    				sprintf((char *)enetvar,
    					i ? "eth%daddr" : "ethaddr",
    					i);
    				setenv((char *)enetvar, (char *)ethaddr[i]);
    			}
    		}
    	}
    	return 0;
    }