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google/snappy: Override USB2 strength by SKUID

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14" BigDaddy needs to override USB2 TxiSet additionally to
enhance driving strength.

Otherwise EA test will fail on USB2 eye pattern.

BUG=b:67820719
BRANCH=reef
TEST=emerge-snappy coreboot
Change-Id: I674c121a71866a5d44439eeb49e07f917d816de8
Signed-off-by: Kevin Chiu <Kevin.Chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/22037
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Kevin Chiu 2017-10-16 16:38:08 +08:00 committed by Aaron Durbin
parent c869cd2f44
commit 53660ed499
1 changed files with 37 additions and 0 deletions
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37
src/mainboard/google/reef/variants/snappy/mainboard.c
View file

@ -17,6 +17,22 @@
#include <baseboard/variants.h>
#include <ec/google/chromeec/ec.h>
#include <vendorcode/google/chromeos/cros_vpd.h>
#include <soc/cpu.h>
#include <soc/intel/apollolake/chip.h>
/* SKU ID enumeration */
enum snappy_sku {
SKU_UNKNOWN = -1,
SKU_RESERVED0,
SKU_RESERVED1,
SKU_BIGDADDY_KBDBKLIGHT,
SKU_RESERVED3,
SKU_RESERVED4,
SKU_BIGDADDY,
SKU_RESERVED6,
SKU_ALAN,
SKU_SNAPPY,
};
void variant_board_ec_set_skuid(void)
{
@ -63,3 +79,24 @@ uint8_t variant_board_sku(void)
return board_sku_num;
}
void mainboard_devtree_update(struct device *dev)
{
/* Override dev tree settings per board */
struct soc_intel_apollolake_config *cfg = dev->chip_info;
uint8_t sku_id;
sku_id = variant_board_sku();
switch (sku_id) {
case SKU_BIGDADDY_KBDBKLIGHT:
case SKU_BIGDADDY:
cfg->usb2eye[1].Usb20PerPortPeTxiSet = 7;
cfg->usb2eye[1].Usb20PerPortTxiSet = 7;
cfg->usb2eye[1].Usb20IUsbTxEmphasisEn = 3;
cfg->usb2eye[1].Usb20PerPortTxPeHalf = 0;
break;
default:
break;
}
}