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ide: move ide_pio_cycle_time() to ide-timings.c 

All ide_pio_cycle_time() users already select CONFIG_IDE_TIMINGS
so move the function from ide-lib.c to ide-timings.c.

While at it:

- convert ide_pio_cycle_time() to use ide_timing_find_mode()

- cleanup ide_pio_cycle_time() a bit

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-07-16 20:33:39 +02:00
parent 8a97206e31
commit c9d6c1a237
3 changed files with 23 additions and 24 deletions
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23
drivers/ide/ide-lib.c
View File

@ -188,29 +188,6 @@ static int ide_scan_pio_blacklist (char *model)
return -1;
}
unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
{
struct hd_driveid *id = drive->id;
int cycle_time = 0;
if (id->field_valid & 2) {
if (id->capability & 8)
cycle_time = id->eide_pio_iordy;
else
cycle_time = id->eide_pio;
}
/* conservative "downgrade" for all pre-ATA2 drives */
if (pio < 3) {
if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
cycle_time = 0; /* use standard timing */
}
return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
}
EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
/**
* ide_get_best_pio_mode - get PIO mode from drive
* @drive: drive to consider

22
drivers/ide/ide-timings.c
View File

@ -1,5 +1,6 @@
/*
* Copyright (c) 1999-2001 Vojtech Pavlik
* Copyright (c) 2007-2008 Bartlomiej Zolnierkiewicz
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -75,6 +76,27 @@ struct ide_timing *ide_timing_find_mode(u8 speed)
}
EXPORT_SYMBOL_GPL(ide_timing_find_mode);
u16 ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
{
struct hd_driveid *id = drive->id;
struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
u16 cycle = 0;
if (id->field_valid & 2) {
if (id->capability & 8)
cycle = id->eide_pio_iordy;
else
cycle = id->eide_pio;
/* conservative "downgrade" for all pre-ATA2 drives */
if (pio < 3 && cycle < t->cycle)
cycle = 0; /* use standard timing */
}
return cycle ? cycle : t->cycle;
}
EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
#define ENOUGH(v, unit) (((v) - 1) / (unit) + 1)
#define EZ(v, unit) ((v) ? ENOUGH(v, unit) : 0)

2
include/linux/ide.h
View File

@ -1300,6 +1300,7 @@ enum {
};
struct ide_timing *ide_timing_find_mode(u8);
u16 ide_pio_cycle_time(ide_drive_t *, u8);
void ide_timing_merge(struct ide_timing *, struct ide_timing *,
struct ide_timing *, unsigned int);
int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
@ -1311,7 +1312,6 @@ typedef struct ide_pio_timings_s {
/* active + recovery (+ setup for some chips) */
} ide_pio_timings_t;
unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
extern const ide_pio_timings_t ide_pio_timings[6];