diff options
| author | Björn Stenberg <bjorn@haxx.se> | 2002-12-03 11:26:39 +0000 |
|---|---|---|
| committer | Björn Stenberg <bjorn@haxx.se> | 2002-12-03 11:26:39 +0000 |
| commit | 1ea00d1a0323745093442b889e33e5e82924726a (patch) | |
| tree | e54436a9f3248b22824572db7a912e56e259cc32 /firmware/drivers/ata.c | |
| parent | cd89646e5821e4c752e2d1726477b8122a66bc3b (diff) | |
Added a >2ms delay in ata_hard_reset() before reading status, as per ATA specificatione (pedantic mode entered)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2902 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/drivers/ata.c')
| -rw-r--r-- | firmware/drivers/ata.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/firmware/drivers/ata.c b/firmware/drivers/ata.c index 0fbc418c2f..5cff8af19e 100644 --- a/firmware/drivers/ata.c +++ b/firmware/drivers/ata.c @@ -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 ret; - PADR &= ~0x0200; + /* state HRR0 */ + PADR &= ~0x0200; /* assert _RESET */ + sleep(1); /* > 25us */ - sleep(2); - - PADR |= 0x0200; + /* state HRR1 */ + PADR |= 0x0200; /* negate _RESET */ + sleep(1); /* > 2ms */ + /* state HRR2 */ ret = wait_for_bsy(); /* Massage the return code so it is 0 on success and -1 on failure */ |