mips/sgi-ip22/ip22-nvram.c

1 // SPDX-License-Identifier: GPL-2.0
3  * ip22-nvram.c: NVRAM and serial EEPROM handling.
5  * Copyright (C) 2003 Ladislav Michl (ladis@linux-mips.org)
14 #define EEPROM_WEN	0x9800	/* write enable before prog modes */
15 #define EEPROM_WRITE	0xa000	/* serial memory write */
16 #define EEPROM_WRALL	0x8800	/* write all registers */
18 #define EEPROM_PRREAD	0xc000	/* read protect register */
19 #define EEPROM_PREN	0x9800	/* enable protect register mode */
20 #define EEPROM_PRCLEAR	0xffff	/* clear protect register */
21 #define EEPROM_PRWRITE	0xa000	/* write protect register */
22 #define EEPROM_PRDS	0x8000	/* disable protect register, forever */
24 #define EEPROM_EPROT	0x01	/* Protect register enable */
61 	ser_cmd = cmd | (reg << (16 - BITS_IN_COMMAND));  in eeprom_cmd()
112 		return ip22_eeprom_read(&hpc3c0->eeprom, reg);  in ip22_nvram_read()
117 		tmp = hpc3c0->bbram[reg++] & 0xff;  in ip22_nvram_read()
118 		return (tmp << 8) | (hpc3c0->bbram[reg] & 0xff);  in ip22_nvram_read()