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Better ATA I/O detection

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1065 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-06-18 12:53:02 +00:00
parent 1a17d356f2
commit a422b8381b
1 changed files with 5 additions and 2 deletions
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7
firmware/drivers/ata.c
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@ -23,6 +23,7 @@
#include "sh7034.h"
#include "system.h"
#include "debug.h"
#include "panic.h"
#define SECTOR_SIZE 512
#define ATA_DATA (*((volatile unsigned short*)0x06104100))
@ -328,7 +329,8 @@ static int master_slave_detect(void)
static int io_address_detect(void)
{
unsigned char tmp = ATA_STATUS;
unsigned char tmp = ATA_STATUS & 0xf9; /* Mask the IDX and CORR bits */
unsigned char tmp2;
unsigned char dummy;
/* We compare the STATUS register with the ALT_STATUS register, which
@ -340,8 +342,9 @@ static int io_address_detect(void)
to the ATA controller. We read a register that we know exists to make
sure that the data on the bus isn't identical to the STATUS register
contents. */
ATA_SECTOR = 0;
dummy = ATA_SECTOR;
if(tmp == *ATA_CONTROL2)
if(tmp == (*ATA_CONTROL2) & 0xf9)
{
DEBUGF("CONTROL is at 0x306\n");
ata_control = ATA_CONTROL2;