platform/mihawk: Tune equalization settings for opencapi

The Bittware 250SOC adapter on Mihawk was showing a high count of CRC
errors on one of the opencapi slots. The PHY team suggested new
equalization settings to correct the errors.

All existing adapters have been tested on mihawk to make sure the
settings are compatible. However, the new settings should not be used
on platforms other than mihawk.

The changes specific to mihawk are:
- Update the tx_ffe_pre_coeff and tx_ffe_post_coeff input parameters
  used during zcal
- turn off the tx_ffe_boost parameter through scom

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Cc: skiboot-stable@lists.ozlabs.org # skiboot-op940.x
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/platform.h b/include/platform.h
index 6aa263a..ef93278 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -47,6 +47,12 @@ struct bmc_platform {
 	const struct bmc_sw_config *sw;
 };
 
+struct ocapi_phy_setup {
+	int tx_ffe_pre_coeff;
+	int tx_ffe_post_coeff;
+	int tx_ffe_boost_en;
+};
+
 /* OpenCAPI platform-specific I2C information */
 struct platform_ocapi {
 	uint8_t i2c_engine;		/* I2C engine number */
@@ -64,6 +70,7 @@ struct platform_ocapi {
 	bool odl_phy_swap;		/* Swap ODL1 to use brick 2 rather than
 					 * brick 1 lanes */
 	const char *(*ocapi_slot_label)(uint32_t chip_id, uint32_t brick_index);
+	const struct ocapi_phy_setup *phy_setup;
 };
 
 struct dt_node;