IB/hfi1: Add special setting for low power AOC

	}

}

/*

 * Return a special SerDes setting for low power AOC cables.  The power class

 * threshold and setting being used were all found by empirical testing.

 *

 * Summary of the logic:

 *

 * if (QSFP and QSFP_TYPE == AOC and QSFP_POWER_CLASS < 4)

 *     return 0xe

 * return 0; // leave at default

 */

static u8 aoc_low_power_setting(struct hfi1_pportdata *ppd)

{

	u8 *cache = ppd->qsfp_info.cache;

	int power_class;

	/* QSFP only */

	if (ppd->port_type != PORT_TYPE_QSFP)

		return 0; /* leave at default */

	/* active optical cables only */

	switch ((cache[QSFP_MOD_TECH_OFFS] & 0xF0) >> 4) {

	case 0x0 ... 0x9: /* fallthrough */

	case 0xC: /* fallthrough */

	case 0xE:

		/* active AOC */

		power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]);

		if (power_class < QSFP_POWER_CLASS_4)

			return 0xe;

	}

	return 0; /* leave at default */

}

static void apply_tunings(

		struct hfi1_pportdata *ppd, u32 tx_preset_index,

		u8 tuning_method, u32 total_atten, u8 limiting_active)

		tx_preset_index, TX_PRESET_TABLE_POSTCUR, &tx_preset, 4);

	postcur = tx_preset;

	config_data = precur | (attn << 8) | (postcur << 16);

	/*

	 * NOTES:

	 * o The aoc_low_power_setting is applied to all lanes even

	 *   though only lane 0's value is examined by the firmware.

	 * o A lingering low power setting after a cable swap does

	 *   not occur.  On cable unplug the 8051 is reset and

	 *   restarted on cable insert.  This resets all settings to

	 *   their default, erasing any previous low power setting.

	 */

	config_data = precur | (attn << 8) | (postcur << 16) |

			(aoc_low_power_setting(ppd) << 24);

	apply_tx_lanes(ppd, TX_EQ_SETTINGS, config_data,

		       "Applying TX settings");