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Added a >2ms delay in ata_hard_reset() before reading status, as per ATA specificatione (pedantic mode entered)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2902 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Björn Stenberg 2002-12-03 11:26:39 +00:00
parent cd89646e58
commit 1ea00d1a03
1 changed files with 8 additions and 4 deletions
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12
firmware/drivers/ata.c
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@ -523,16 +523,20 @@ static void ata_thread(void)
} }
} }
/* Hardware reset protocol as specified in chapter 9.1, ATA spec draft v5 */
int ata_hard_reset(void) int ata_hard_reset(void)
{ {
int ret; int ret;
PADR &= ~0x0200; /* state HRR0 */
PADR &= ~0x0200; /* assert _RESET */
sleep(1); /* > 25us */
sleep(2); /* state HRR1 */
PADR |= 0x0200; /* negate _RESET */
PADR |= 0x0200; sleep(1); /* > 2ms */
/* state HRR2 */
ret = wait_for_bsy(); ret = wait_for_bsy();
/* Massage the return code so it is 0 on success and -1 on failure */ /* Massage the return code so it is 0 on success and -1 on failure */