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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [ide/] [ide_modes.h] - Rev 1765
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/* * linux/drivers/ide/ide_modes.h * * Copyright (C) 1996 Linus Torvalds, Igor Abramov, and Mark Lord */ #ifndef _IDE_MODES_H #define _IDE_MODES_H #include <linux/config.h> /* * Shared data/functions for determining best PIO mode for an IDE drive. * Most of this stuff originally lived in cmd640.c, and changes to the * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid * breaking the fragile cmd640.c support. */ /* * Standard (generic) timings for PIO modes, from ATA2 specification. * These timings are for access to the IDE data port register *only*. * Some drives may specify a mode, while also specifying a different * value for cycle_time (from drive identification data). */ typedef struct ide_pio_timings_s { int setup_time; /* Address setup (ns) minimum */ int active_time; /* Active pulse (ns) minimum */ int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */ } ide_pio_timings_t; typedef struct ide_pio_data_s { u8 pio_mode; u8 use_iordy; u8 overridden; u8 blacklisted; unsigned int cycle_time; } ide_pio_data_t; u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d); extern const ide_pio_timings_t ide_pio_timings[6]; #endif /* _IDE_MODES_H */