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Added ata_spindown() and use of ALT_STATUS instead of STATUS

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@259 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Björn Stenberg 2002-04-27 14:19:00 +00:00
parent 2d00952708
commit 6c9e57810d
2 changed files with 49 additions and 5 deletions
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42
firmware/drivers/ata.c
View file

@ -31,6 +31,7 @@
#define ATA_COMMAND (*((volatile unsigned char*)0x06100107))
#define ATA_STATUS ATA_COMMAND
#define ATA_CONTROL (*((volatile unsigned char*)0x06100306))
#define ATA_ALT_STATUS ATA_CONTROL
#define SELECT_LBA 0x40
@ -52,7 +53,7 @@
static int wait_for_bsy(void)
{
char timeout = current_tick + HZ;
while (TIME_BEFORE(current_tick, timeout) && (ATA_STATUS & STATUS_BSY))
while (TIME_BEFORE(current_tick, timeout) && (ATA_ALT_STATUS & STATUS_BSY))
yield();
if (TIME_BEFORE(current_tick, timeout))
@ -65,21 +66,21 @@ static int wait_for_rdy(void)
{
if (!wait_for_bsy())
return 0;
return ATA_STATUS & STATUS_RDY;
return ATA_ALT_STATUS & STATUS_RDY;
}
static int wait_for_start_of_transfer(void)
{
if (!wait_for_bsy())
return 0;
return (ATA_STATUS & (STATUS_RDY|STATUS_DRQ)) == (STATUS_RDY|STATUS_DRQ);
}
return (ATA_ALT_STATUS & (STATUS_BSY|STATUS_DRQ)) == STATUS_DRQ;
}
static int wait_for_end_of_transfer(void)
{
if (!wait_for_bsy())
return 0;
return (ATA_STATUS & (STATUS_RDY|STATUS_DRQ)) == STATUS_RDY;
return (ATA_ALT_STATUS & (STATUS_RDY|STATUS_DRQ)) == STATUS_RDY;
}
int ata_read_sectors(unsigned long start,
@ -107,6 +108,11 @@ int ata_read_sectors(unsigned long start,
for (j=0; j<256; j++)
((unsigned short*)buf)[j] = SWAB16(ATA_DATA);
#ifdef USE_INTERRUPT
/* reading the status register clears the interrupt */
j = ATA_STATUS;
#endif
}
led_turn_off();
@ -139,6 +145,11 @@ int ata_write_sectors(unsigned long start,
for (j=0; j<256; j++)
ATA_DATA = SWAB16(((unsigned short*)buf)[j]);
#ifdef USE_INTERRUPT
/* reading the status register clears the interrupt */
j = ATA_STATUS;
#endif
}
led_turn_off ();
@ -193,6 +204,27 @@ static int freeze_lock(void)
return 0;
}
int ata_spindown(int time)
{
if (!wait_for_rdy())
return -1;
if ( time == -1 ) {
ATA_COMMAND = CMD_STANDBY_IMMEDIATE;
}
else {
if (time > 255)
return -1;
ATA_NSECTOR = time & 0xff;
ATA_COMMAND = CMD_STANDBY;
}
if (!wait_for_rdy())
return -1;
return 0;
}
int ata_hard_reset(void)
{
clear_bit(1,PADR);

12
firmware/drivers/ata.h
View file

@ -19,6 +19,18 @@
#ifndef __ATA_H__
#define __ATA_H__
/*
ata_spindown() time values:
-1 Immediate spindown
0 Timeout disabled
1-240 (time * 5) seconds
241-251((time - 240) * 30) minutes
252 21 minutes
253 Period between 8 and 12 hrs
254 Reserved
255 21 min 15 s
*/
extern int ata_spindown(int time);
extern int ata_hard_reset(void);
extern int ata_soft_reset(void);
extern int ata_init(void);