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feat(atapi): add discover for all drives

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This commit is contained in:
Malo Lecomte 2021-07-26 15:00:23 +02:00
parent 38bb731587
commit 26bdfc63d6
1 changed files with 20 additions and 4 deletions
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24
k/atapi.c
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@ -24,7 +24,7 @@ static void wait_device_selection(uint16_t drive)
inb(drive);
}
static uint8_t is_atapi_driver(uint16_t bus, uint8_t slave)
static uint8_t is_atapi_drive(uint16_t bus, uint8_t slave)
{
static uint8_t atapi_sig[] = { ATAPI_SIG_SC, ATAPI_SIG_LBA_LO,
ATAPI_SIG_LBA_MI, ATAPI_SIG_LBA_HI };
@ -61,15 +61,31 @@ static uint8_t is_atapi_driver(uint16_t bus, uint8_t slave)
void discover_atapi_drive(void)
{
// primary_reg
/* primary_reg */
outb(PRIMARY_DCR, SRST);
outb(PRIMARY_DCR, INTERRUPT_DISABLE);
// master_port
select_drive(PRIMARY_REG, ATA_PORT_MASTER);
wait_device_selection(PRIMARY_REG);
is_atapi_driver(PRIMARY_REG, ATA_PORT_MASTER);
is_atapi_drive(PRIMARY_REG, ATA_PORT_MASTER);
// secondary_reg
// slave port
select_drive(PRIMARY_REG, ATA_PORT_SLAVE);
wait_device_selection(PRIMARY_REG);
is_atapi_drive(PRIMARY_REG, ATA_PORT_SLAVE);
/* secondary_reg */
outb(SECONDARY_DCR, SRST);
outb(SECONDARY_DCR, INTERRUPT_DISABLE);
// master_port
select_drive(SECONDARY_REG, ATA_PORT_MASTER);
wait_device_selection(SECONDARY_REG);
is_atapi_drive(SECONDARY_REG, ATA_PORT_MASTER);
// slave port
select_drive(SECONDARY_REG, ATA_PORT_SLAVE);
wait_device_selection(SECONDARY_REG);
is_atapi_drive(SECONDARY_REG, ATA_PORT_SLAVE);
}