/**
* Pre-initialize the IDE bus.
*
* For Octeon we just reset the IDE bus.
*/
int ide_preinit(void)
{
/* Reset the CF card, as this seems to be necessary in some cases
* when using DMA
*/
ide_set_reset(1);
udelay(50000);
ide_set_reset(0);
udelay(1000);
return 0;
}
void init_ide_reset (void)
{
debug ("init_ide_reset\n");
/*
* Clear the reset bit to reset the interface
* cf. RefMan MPC5121EE: 28.4.1 Resetting the ATA Bus
*/
ide_set_reset(1);
/* Assert the reset bit to enable the interface */
ide_set_reset(0);
}
static void ide_reset(void)
{
int i;
for (i = 0; i < CONFIG_SYS_IDE_MAXBUS; ++i)
ide_bus_ok[i] = 0;
for (i = 0; i < CONFIG_SYS_IDE_MAXDEVICE; ++i)
ide_dev_desc[i].type = DEV_TYPE_UNKNOWN;
ide_set_reset(1); /* assert reset */
/* the reset signal shall be asserted for et least 25 us */
udelay(25);
WATCHDOG_RESET();
/* de-assert RESET signal */
ide_set_reset(0);
/* wait 250 ms */
for (i = 0; i < 250; ++i)
udelay(1000);
}
int ide_preinit (void)
{
volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
long t;
const struct {
short t0;
short t1;
short t2_8;
short t2_16;
short t2i;
short t4;
short t9;
short tA;
} pio_specs = {
.t0 = 600,
.t1 = 70,
.t2_8 = 290,
.t2_16 = 165,
.t2i = 0,
.t4 = 30,
.t9 = 20,
.tA = 50,
};
union {
u32 config;
struct {
u8 field1;
u8 field2;
u8 field3;
u8 field4;
}bytes;
} cfg;
debug ("IDE preinit using PATA peripheral at IMMR-ADDR %08x\n",
(u32)&im->pata);
/* Set the reset bit to 1 to enable the interface */
ide_set_reset(0);
/* Init timings : we use PIO mode 0 timings */
t = 1000000000 / gd->arch.ips_clk; /* period in ns */
cfg.bytes.field1 = 3;
cfg.bytes.field2 = 3;
cfg.bytes.field3 = (pio_specs.t1 + t) / t;
cfg.bytes.field4 = (pio_specs.t2_8 + t) / t;
out_be32(&im->pata.pata_time1, cfg.config);
cfg.bytes.field1 = (pio_specs.t2_8 + t) / t;
cfg.bytes.field2 = (pio_specs.tA + t) / t + 2;
cfg.bytes.field3 = 1;
cfg.bytes.field4 = (pio_specs.t4 + t) / t;
out_be32(&im->pata.pata_time2, cfg.config);
cfg.config = in_be32(&im->pata.pata_time3);
cfg.bytes.field1 = (pio_specs.t9 + t) / t;
out_be32(&im->pata.pata_time3, cfg.config);
debug ("PATA preinit complete.\n");
return 0;
}
