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| 2 | |
| 3 | Copyright (C) 2004 - 2006 rt2x00 SourceForge Project
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| 4 | <http://rt2x00.serialmonkey.com>
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| 5 |
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| 6 |
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| 7 |
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| 8 | |
| 9 | Module: eeprom_93cx6
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| 10 | Abstract: EEPROM reader datastructures for 93cx6 chipsets.
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| 11 | Supported chipsets: 93c46, 93c56 and 93c66.
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| 12 |
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| 13 |
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| 14 | #include <linux/bits.h>
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| 15 |
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| 16 | |
| 17 | * EEPROM operation defines.
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| 18 |
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| 19 | #define PCI_EEPROM_WIDTH_93C46 6
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| 20 | #define PCI_EEPROM_WIDTH_93C56 8
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| 21 | #define PCI_EEPROM_WIDTH_93C66 8
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| 22 | #define PCI_EEPROM_WIDTH_93C86 8
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| 23 | #define PCI_EEPROM_WIDTH_OPCODE 3
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| 24 | #define PCI_EEPROM_WRITE_OPCODE 0x05
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| 25 | #define PCI_EEPROM_ERASE_OPCODE 0x07
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| 26 | #define PCI_EEPROM_READ_OPCODE 0x06
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| 27 | #define PCI_EEPROM_EWDS_OPCODE 0x10
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| 28 | #define PCI_EEPROM_EWEN_OPCODE 0x13
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| 29 |
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| 30 | |
| 31 | * struct eeprom_93cx6 - control structure for setting the commands
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| 32 | * for reading the eeprom data.
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| 33 | * @data: private pointer for the driver.
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| 34 | * @register_read: handler to read the eeprom register;
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| 35 | * this function should set all reg_* fields.
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| 36 | * @register_write: handler to write to the eeprom register by using
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| 37 | * all reg_* fields.
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| 38 | * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines
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| 39 | * @quirks: eeprom or controller quirks
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| 40 | * @drive_data: Set if we're driving the data line.
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| 41 | * @reg_data_in: register field to indicate data input
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| 42 | * @reg_data_out: register field to indicate data output
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| 43 | * @reg_data_clock: register field to set the data clock
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| 44 | * @reg_chip_select: register field to set the chip select
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| 45 | *
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| 46 | * This structure is used for the communication between the driver
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| 47 | * and the eeprom_93cx6 handlers for reading the eeprom.
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| 48 |
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| 49 | struct eeprom_93cx6 {
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| 50 | void *data;
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| 51 |
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| 52 | void (*register_read)(struct eeprom_93cx6 *eeprom);
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| 53 | void (*register_write)(struct eeprom_93cx6 *eeprom);
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| 54 |
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| 55 | int width;
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| 56 | unsigned int quirks;
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| 57 |
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| 58 | #define PCI_EEPROM_QUIRK_EXTRA_READ_CYCLE BIT(0)
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| 59 |
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| 60 | char drive_data;
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| 61 | char reg_data_in;
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| 62 | char reg_data_out;
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| 63 | char reg_data_clock;
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| 64 | char reg_chip_select;
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| 65 | };
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| 66 |
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| 67 | extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
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| 68 | const u8 word, u16 *data);
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| 69 | extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
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| 70 | const u8 word, __le16 *data, const u16 words);
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| 71 | extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom,
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| 72 | const u8 byte, u8 *data);
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| 73 | extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom,
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| 74 | const u8 byte, u8 *data, const u16 bytes);
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| 75 |
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| 76 | extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
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| 77 |
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| 78 | extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
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| 79 | u8 addr, u16 data);
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| 80 |
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| 81 | static inline bool has_quirk_extra_read_cycle(struct eeprom_93cx6 *eeprom)
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| 82 | {
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| 83 | return eeprom->quirks & PCI_EEPROM_QUIRK_EXTRA_READ_CYCLE;
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| 84 | }
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