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7ff28aee40
Add read-only support for EEPROMs configured in 8-bit mode (ORG pin connected to GND). This will be used by wd719x driver. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/*
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Copyright (C) 2004 - 2006 rt2x00 SourceForge Project
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: eeprom_93cx6
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Abstract: EEPROM reader datastructures for 93cx6 chipsets.
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Supported chipsets: 93c46, 93c56 and 93c66.
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*/
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/*
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* EEPROM operation defines.
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*/
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#define PCI_EEPROM_WIDTH_93C46 6
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#define PCI_EEPROM_WIDTH_93C56 8
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#define PCI_EEPROM_WIDTH_93C66 8
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#define PCI_EEPROM_WIDTH_93C86 8
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#define PCI_EEPROM_WIDTH_OPCODE 3
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#define PCI_EEPROM_WRITE_OPCODE 0x05
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#define PCI_EEPROM_ERASE_OPCODE 0x07
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#define PCI_EEPROM_READ_OPCODE 0x06
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#define PCI_EEPROM_EWDS_OPCODE 0x10
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#define PCI_EEPROM_EWEN_OPCODE 0x13
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/**
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* struct eeprom_93cx6 - control structure for setting the commands
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* for reading the eeprom data.
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* @data: private pointer for the driver.
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* @register_read(struct eeprom_93cx6 *eeprom): handler to
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* read the eeprom register, this function should set all reg_* fields.
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* @register_write(struct eeprom_93cx6 *eeprom): handler to
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* write to the eeprom register by using all reg_* fields.
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* @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines
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* @drive_data: Set if we're driving the data line.
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* @reg_data_in: register field to indicate data input
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* @reg_data_out: register field to indicate data output
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* @reg_data_clock: register field to set the data clock
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* @reg_chip_select: register field to set the chip select
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*
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* This structure is used for the communication between the driver
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* and the eeprom_93cx6 handlers for reading the eeprom.
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*/
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struct eeprom_93cx6 {
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void *data;
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void (*register_read)(struct eeprom_93cx6 *eeprom);
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void (*register_write)(struct eeprom_93cx6 *eeprom);
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int width;
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char drive_data;
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char reg_data_in;
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char reg_data_out;
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char reg_data_clock;
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char reg_chip_select;
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};
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extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
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const u8 word, u16 *data);
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extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
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const u8 word, __le16 *data, const u16 words);
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extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom,
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const u8 byte, u8 *data);
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extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom,
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const u8 byte, u8 *data, const u16 bytes);
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extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
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extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
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u8 addr, u16 data);
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