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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
Copyright (C) 2004 - 2006 rt2x00 SourceForge Project
<http://rt2x00.serialmonkey.com>
*/
/*
Module: eeprom_93cx6
Abstract: EEPROM reader datastructures for 93cx6 chipsets.
Supported chipsets: 93c46, 93c56 and 93c66.
*/
#include <linux/bits.h>
/*
* EEPROM operation defines.
*/
#define PCI_EEPROM_WIDTH_93C46 6
#define PCI_EEPROM_WIDTH_93C56 8
#define PCI_EEPROM_WIDTH_93C66 8
#define PCI_EEPROM_WIDTH_93C86 8
#define PCI_EEPROM_WIDTH_OPCODE 3
#define PCI_EEPROM_WRITE_OPCODE 0x05
#define PCI_EEPROM_ERASE_OPCODE 0x07
#define PCI_EEPROM_READ_OPCODE 0x06
#define PCI_EEPROM_EWDS_OPCODE 0x10
#define PCI_EEPROM_EWEN_OPCODE 0x13
/**
* struct eeprom_93cx6 - control structure for setting the commands
* for reading the eeprom data.
* @data: private pointer for the driver.
* @register_read(struct eeprom_93cx6 *eeprom): handler to
* read the eeprom register, this function should set all reg_* fields.
* @register_write(struct eeprom_93cx6 *eeprom): handler to
* write to the eeprom register by using all reg_* fields.
* @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines
* @quirks: eeprom or controller quirks
* @drive_data: Set if we're driving the data line.
* @reg_data_in: register field to indicate data input
* @reg_data_out: register field to indicate data output
* @reg_data_clock: register field to set the data clock
* @reg_chip_select: register field to set the chip select
*
* This structure is used for the communication between the driver
* and the eeprom_93cx6 handlers for reading the eeprom.
*/
struct eeprom_93cx6 {
void *data;
void (*register_read)(struct eeprom_93cx6 *eeprom);
void (*register_write)(struct eeprom_93cx6 *eeprom);
int width;
unsigned int quirks;
/* Some EEPROMs require an extra clock cycle before reading */
#define PCI_EEPROM_QUIRK_EXTRA_READ_CYCLE BIT(0)
char drive_data;
char reg_data_in;
char reg_data_out;
char reg_data_clock;
char reg_chip_select;
};
extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
const u8 word, u16 *data);
extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
const u8 word, __le16 *data, const u16 words);
extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom,
const u8 byte, u8 *data);
extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom,
const u8 byte, u8 *data, const u16 bytes);
extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
u8 addr, u16 data);
static inline bool has_quirk_extra_read_cycle(struct eeprom_93cx6 *eeprom)
{
return eeprom->quirks & PCI_EEPROM_QUIRK_EXTRA_READ_CYCLE;
}