slippy: Add iSSD power sequencing
Without an LM10506-A the power sequencing for this part needs to be done manually using GPIOs. Change-Id: I842152e5f7c30c8dbe37df0c344935a659eb2887 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/49648 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/4150 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
parent
cf72d91613
commit
e820a6ce83
|
@ -18,7 +18,9 @@
|
|||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <delay.h>
|
||||
#include <stdint.h>
|
||||
#include <stdlib.h>
|
||||
#include <console/console.h>
|
||||
#include "cpu/intel/haswell/haswell.h"
|
||||
#include "northbridge/intel/haswell/haswell.h"
|
||||
|
@ -71,6 +73,39 @@ const struct rcba_config_instruction rcba_config[] = {
|
|||
RCBA_END_CONFIG,
|
||||
};
|
||||
|
||||
/*
|
||||
* Power Sequencing for SanDisk i100/i110 SSD
|
||||
*
|
||||
* Must be sequenced in this order with specified timing.
|
||||
*
|
||||
* 1. VCC_IO : 30us - 100ms
|
||||
* 2. VCC_FLASH : 70us - 10ms
|
||||
* 3. VCCQ : 70us - 10ms
|
||||
* 4. VDDC : 30us - 100ms
|
||||
*
|
||||
* There is no feedback to know if the voltage has stabilized
|
||||
* so this implementation will use the max ramp times. That
|
||||
* means it adds significantly to the boot time.
|
||||
*/
|
||||
static void issd_power_sequence(void)
|
||||
{
|
||||
struct gpio_seq {
|
||||
int gpio;
|
||||
int wait_ms;
|
||||
} issd_gpio_seq[] = {
|
||||
{ 49, 100 }, /* VCC_IO: GPIO 49, wait 100ms */
|
||||
{ 44, 10 }, /* VCC_FLASH: GPIO 44, wait 10ms */
|
||||
{ 17, 10 }, /* VCCQ: GPIO 17, wait 10ms */
|
||||
{ 16, 100 }, /* VDDC: GPIO 16, wait 100ms */
|
||||
};
|
||||
int step;
|
||||
|
||||
for (step = 0; step < ARRAY_SIZE(issd_gpio_seq); step++) {
|
||||
set_gpio(issd_gpio_seq[step].gpio, 1);
|
||||
udelay(issd_gpio_seq[step].wait_ms * 1000);
|
||||
}
|
||||
}
|
||||
|
||||
void mainboard_romstage_entry(unsigned long bist)
|
||||
{
|
||||
struct pei_data pei_data = {
|
||||
|
@ -119,4 +154,7 @@ void mainboard_romstage_entry(unsigned long bist)
|
|||
|
||||
/* Call into the real romstage main with this board's attributes. */
|
||||
romstage_common(&romstage_params);
|
||||
|
||||
/* Power sequence the iSSD module */
|
||||
issd_power_sequence();
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue