1 files changed, 0 insertions, 126 deletions
diff --git a/board/puff/port-sm.c b/board/puff/port-sm.c
deleted file mode 100644
index d549b5754b..0000000000
--- a/board/puff/port-sm.c
+++ /dev/null
@@ -1,126 +0,0 @@
-/* Copyright 2019 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-struct port_states {
-	/* PORT_*n masks correspond to bits in this field */
-	uint8_t bitfield;
-	/* If 1, type C is RP_1A5 (otherwise assumed to be RP_3A0) */
-	uint8_t c_low_power;
-	/* If 1, front ports are current-limited */
-	uint8_t front_a_limited;
-};
-
-#define PORTMASK_FRONT_A0 0
-#define PORTMASK_FRONT_A1 1
-#define PORTMASK_REAR_A0 2
-#define PORTMASK_REAR_A1 3
-#define PORTMASK_REAR_A2 4
-#define PORTMASK_HDMI0 5
-#define PORTMASK_HDMI1 6
-#define PORTMASK_TYPEC 7
-
-#define PORT_FRONT_A0 (1 << PORTMASK_FRONT_A0)
-#define PORT_FRONT_A1 (1 << PORTMASK_FRONT_A1)
-#define PORT_REAR_A0 (1 << PORTMASK_REAR_A0)
-#define PORT_REAR_A1 (1 << PORTMASK_REAR_A1)
-#define PORT_REAR_A2 (1 << PORTMASK_REAR_A2)
-#define PORT_HDMI0 (1 << PORTMASK_HDMI0)
-#define PORT_HDMI1 (1 << PORTMASK_HDMI1)
-#define PORT_TYPEC (1 << PORTMASK_TYPEC)
-#define PORT_ENABLED(id) (!!(states->bitfield & (PORT_##id)))
-
-#define PWR_FRONT_HIGH 1603
-#define PWR_FRONT_LOW 963
-#define PWR_REAR 1075
-#define PWR_HDMI 562
-#define PWR_C_HIGH 3740
-#define PWR_C_LOW 2090
-
-/*
- * Calculate the amount of power (in mA) available on the 5V rail.
- *
- * If negative, the system is at risk of browning out.
- */
-int compute_headroom(const struct port_states *states)
-{
-	int headroom = 10000 - 1335; /* Capacity less base load */
-
-	headroom -= PWR_HDMI * (PORT_ENABLED(HDMI0) + PORT_ENABLED(HDMI1));
-	headroom -= PWR_REAR * (PORT_ENABLED(REAR_A0) + PORT_ENABLED(REAR_A1) +
-				PORT_ENABLED(REAR_A2));
-
-	switch (PORT_ENABLED(FRONT_A0) + PORT_ENABLED(FRONT_A1)) {
-	case 2:
-		headroom -= PWR_FRONT_LOW + (states->front_a_limited ?
-						     PWR_FRONT_LOW :
-						     PWR_FRONT_HIGH);
-		break;
-	case 1:
-		headroom -= states->front_a_limited ? PWR_FRONT_LOW :
-						      PWR_FRONT_HIGH;
-		break;
-	default:
-		break;
-	}
-
-	if (PORT_ENABLED(TYPEC))
-		headroom -= states->c_low_power ? PWR_C_LOW : PWR_C_HIGH;
-
-	return headroom;
-}
-
-/*
- * Update states to stay within the 5V rail power budget.
- *
- * Only the current limits (c_low_power and front_a_limited) are effective.
- *
- * The goal here is to ensure that any single state change from what we set
- * (specifically, something being plugged into a port) does not exceed the 5V
- * power budget.
- */
-void update_port_state(struct port_states *states)
-{
-	int headroom = compute_headroom(states);
-
-	if (!PORT_ENABLED(TYPEC)) {
-		/*
-		 * USB-C not in use, prefer to adjust it. We may still need
-		 * to limit front port power.
-		 *
-		 * We want to run the front type-A ports at high power, and they
-		 * may be limited so we need to account for the extra power
-		 * we may be allowing the front ports to draw.
-		 */
-		if (headroom >
-		    (PWR_C_HIGH + (PWR_FRONT_HIGH - PWR_FRONT_LOW))) {
-			states->front_a_limited = 0;
-			states->c_low_power = 0;
-		} else {
-			states->front_a_limited =
-				headroom <
-				(PWR_C_LOW + (PWR_FRONT_HIGH - PWR_FRONT_LOW));
-			states->c_low_power = 1;
-		}
-	} else {
-		/*
-		 * USB-C is in use, prefer to drop front port limits.
-		 * Pessimistically Assume C is currently in low-power mode.
-		 */
-		if (headroom > (PWR_C_HIGH - PWR_C_LOW + PWR_FRONT_HIGH)) {
-			/* Can still go full power */
-			states->front_a_limited = 0;
-			states->c_low_power = 0;
-		} else if (headroom >
-			   (PWR_C_HIGH - PWR_C_LOW + PWR_FRONT_LOW)) {
-			/* Reducing front allows C to go to full power */
-			states->front_a_limited = 1;
-			states->c_low_power = 0;
-		} else {
-			/* Must reduce both */
-			states->front_a_limited = 1;
-			states->c_low_power = 1;
-		}
-	}
-}