1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 Copyright (C) 2004 - 2006 rt2x00 SourceForge Project 4 <http://rt2x00.serialmonkey.com> 5 6 */ 7 8 /* 9 Module: eeprom_93cx6 10 Abstract: EEPROM reader datastructures for 93cx6 chipsets. 11 Supported chipsets: 93c46, 93c56 and 93c66. 12 */ 13 14 /* 15 * EEPROM operation defines. 16 */ 17 #define PCI_EEPROM_WIDTH_93C46 6 18 #define PCI_EEPROM_WIDTH_93C56 8 19 #define PCI_EEPROM_WIDTH_93C66 8 20 #define PCI_EEPROM_WIDTH_93C86 8 21 #define PCI_EEPROM_WIDTH_OPCODE 3 22 #define PCI_EEPROM_WRITE_OPCODE 0x05 23 #define PCI_EEPROM_ERASE_OPCODE 0x07 24 #define PCI_EEPROM_READ_OPCODE 0x06 25 #define PCI_EEPROM_EWDS_OPCODE 0x10 26 #define PCI_EEPROM_EWEN_OPCODE 0x13 27 28 /** 29 * struct eeprom_93cx6 - control structure for setting the commands 30 * for reading the eeprom data. 31 * @data: private pointer for the driver. 32 * @register_read(struct eeprom_93cx6 *eeprom): handler to 33 * read the eeprom register, this function should set all reg_* fields. 34 * @register_write(struct eeprom_93cx6 *eeprom): handler to 35 * write to the eeprom register by using all reg_* fields. 36 * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines 37 * @drive_data: Set if we're driving the data line. 38 * @reg_data_in: register field to indicate data input 39 * @reg_data_out: register field to indicate data output 40 * @reg_data_clock: register field to set the data clock 41 * @reg_chip_select: register field to set the chip select 42 * 43 * This structure is used for the communication between the driver 44 * and the eeprom_93cx6 handlers for reading the eeprom. 45 */ 46 struct eeprom_93cx6 { 47 void *data; 48 49 void (*register_read)(struct eeprom_93cx6 *eeprom); 50 void (*register_write)(struct eeprom_93cx6 *eeprom); 51 52 int width; 53 54 char drive_data; 55 char reg_data_in; 56 char reg_data_out; 57 char reg_data_clock; 58 char reg_chip_select; 59 }; 60 61 extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom, 62 const u8 word, u16 *data); 63 extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom, 64 const u8 word, __le16 *data, const u16 words); 65 extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom, 66 const u8 byte, u8 *data); 67 extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom, 68 const u8 byte, u8 *data, const u16 bytes); 69 70 extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable); 71 72 extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom, 73 u8 addr, u16 data); 74