Trogdor: Create Trogdor baseboard

Move the common stuff to from board to baseboard to reduce the effort
of forking and maintaining derivatives.

This CL is intended to simply moving things around, not to address
other needs, like supporting a different EC.

Leave the following stuff in board:
 * Features for debugging
 * GPIO and interrupt handlers (likely will be changed)
 * BC 1.2 (already changed from Trogdor rev-0 and rev-1)
 * TCPC/MUX/PPC (will be changed)
 * Sensors (clamshell vs convertible)
 * ADC (detachable vs convertible)
 * LED/PWM
 * Battery

Others are moved to baseboard.

BRANCH=None
BUG=b:146237680
TEST=Build Trogdor and it boots. Should be good as there is no logic
change.

Change-Id: I2e4cd76d18f8739b5b7d5b1dae67c13e038b4480
Signed-off-by: Wai-Hong Tam <waihong@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2099390

1 files changed, 260 insertions, 0 deletions

diff --git a/baseboard/trogdor/usb_pd_policy.c b/baseboard/trogdor/usb_pd_policy.c
new file mode 100644
index 0000000000..40cfd91319
--- /dev/null
+++ b/baseboard/trogdor/usb_pd_policy.c
@@ -0,0 +1,260 @@
+/* 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.
+ */
+
+#include "charge_manager.h"
+#include "chipset.h"
+#include "console.h"
+#include "gpio.h"
+#include "system.h"
+#include "usb_mux.h"
+#include "usbc_ppc.h"
+#include "util.h"
+
+#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
+
+int pd_check_vconn_swap(int port)
+{
+	/* In G3, do not allow vconn swap since PP5000 rail is off */
+	return gpio_get_level(GPIO_EN_PP5000);
+}
+
+static uint8_t vbus_en[CONFIG_USB_PD_PORT_MAX_COUNT];
+static uint8_t vbus_rp[CONFIG_USB_PD_PORT_MAX_COUNT] = {TYPEC_RP_1A5,
+							TYPEC_RP_1A5};
+
+static void board_vbus_update_source_current(int port)
+{
+	/* Both port are controlled by PPC SN5S330. */
+	ppc_set_vbus_source_current_limit(port, vbus_rp[port]);
+	ppc_vbus_source_enable(port, vbus_en[port]);
+}
+
+void pd_power_supply_reset(int port)
+{
+	int prev_en;
+
+	prev_en = vbus_en[port];
+
+	/* Disable VBUS */
+	vbus_en[port] = 0;
+	board_vbus_update_source_current(port);
+
+	/* Enable discharge if we were previously sourcing 5V */
+	if (prev_en)
+		pd_set_vbus_discharge(port, 1);
+
+#ifdef CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT
+	/* Give back the current quota we are no longer using */
+	charge_manager_source_port(port, 0);
+#endif /* defined(CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT) */
+
+	/* notify host of power info change */
+	pd_send_host_event(PD_EVENT_POWER_CHANGE);
+}
+
+int pd_set_power_supply_ready(int port)
+{
+	/* Disable charging */
+	board_vbus_sink_enable(port, 0);
+
+	pd_set_vbus_discharge(port, 0);
+
+	/* Provide VBUS */
+	vbus_en[port] = 1;
+	board_vbus_update_source_current(port);
+
+	/* Ensure we advertise the proper available current quota */
+	charge_manager_source_port(port, 1);
+
+	/* notify host of power info change */
+	pd_send_host_event(PD_EVENT_POWER_CHANGE);
+
+	return EC_SUCCESS; /* we are ready */
+}
+
+int board_vbus_source_enabled(int port)
+{
+	return vbus_en[port];
+}
+
+__override void typec_set_source_current_limit(int port, enum tcpc_rp_value rp)
+{
+	vbus_rp[port] = rp;
+	board_vbus_update_source_current(port);
+}
+
+int pd_snk_is_vbus_provided(int port)
+{
+	return !gpio_get_level(port ? GPIO_USB_C1_VBUS_DET_L :
+				      GPIO_USB_C0_VBUS_DET_L);
+}
+
+/* ----------------- Vendor Defined Messages ------------------ */
+#ifdef CONFIG_USB_PD_ALT_MODE_DFP
+__override int svdm_dp_config(int port, uint32_t *payload)
+{
+	int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT);
+	uint8_t pin_mode = get_dp_pin_mode(port);
+
+	if (!pin_mode)
+		return 0;
+
+	/*
+	 * Defer setting the usb_mux until HPD goes high, svdm_dp_attention().
+	 * The AP only supports one DP phy. An external DP mux switches between
+	 * the two ports. Should switch those muxes when it is really used,
+	 * i.e. HPD high; otherwise, the real use case is preempted, like:
+	 *  (1) plug a dongle without monitor connected to port-0,
+	 *  (2) plug a dongle without monitor connected to port-1,
+	 *  (3) plug a monitor to the port-1 dongle.
+	 */
+
+	payload[0] = VDO(USB_SID_DISPLAYPORT, 1,
+			 CMD_DP_CONFIG | VDO_OPOS(opos));
+	payload[1] = VDO_DP_CFG(pin_mode,      /* pin mode */
+				1,             /* DPv1.3 signaling */
+				2);            /* UFP connected */
+	return 2;
+};
+
+__override void svdm_dp_post_config(int port)
+{
+	dp_flags[port] |= DP_FLAGS_DP_ON;
+}
+
+/**
+ * Is the port fine to be muxed its DisplayPort lines?
+ *
+ * Only one port can be muxed to DisplayPort at a time.
+ *
+ * @param port	Port number of TCPC.
+ * @return	1 is fine; 0 is bad as other port is already muxed;
+ */
+static int is_dp_muxable(int port)
+{
+	int i;
+
+	for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++)
+		if (i != port) {
+			if (usb_mux_get(i) & USB_PD_MUX_DP_ENABLED)
+				return 0;
+		}
+
+	return 1;
+}
+
+__override int svdm_dp_attention(int port, uint32_t *payload)
+{
+	enum gpio_signal hpd = GPIO_DP_HOT_PLUG_DET;
+	int lvl = PD_VDO_DPSTS_HPD_LVL(payload[1]);
+	int irq = PD_VDO_DPSTS_HPD_IRQ(payload[1]);
+	int cur_lvl = gpio_get_level(hpd);
+
+	dp_status[port] = payload[1];
+
+	/*
+	 * Initial implementation to handle HPD. Only the first-plugged port
+	 * works, i.e. sending HPD signal to AP. The second-plugged port
+	 * will be ignored.
+	 *
+	 * TODO(waihong): Continue the above case, if the first-plugged port
+	 * is then unplugged, switch to the second-plugged port and signal AP?
+	 */
+	if (lvl) {
+		if (is_dp_muxable(port)) {
+			/*
+			 * Enable and switch the DP port selection mux to the
+			 * correct port.
+			 *
+			 * TODO(waihong): Better to move switching DP mux to
+			 * the usb_mux abstraction.
+			 */
+			gpio_set_level(GPIO_DP_MUX_SEL, port == 1);
+			gpio_set_level(GPIO_DP_MUX_OE_L, 0);
+
+			/* Connect the SBU lines in PPC chip. */
+			if (IS_ENABLED(CONFIG_USBC_PPC_SBU))
+				ppc_set_sbu(port, 1);
+
+			/*
+			 * Connect the USB SS/DP lines in TCPC chip.
+			 *
+			 * When mf_pref not true, still use the dock muxing
+			 * because of the board USB-C topology (limited to 2
+			 * lanes DP).
+			 */
+			usb_mux_set(port, USB_PD_MUX_DOCK,
+				    USB_SWITCH_CONNECT, pd_get_polarity(port));
+		} else {
+			/* TODO(waihong): Info user? */
+			CPRINTS("p%d: The other port is already muxed.", port);
+			return 0;  /* Nack */
+		}
+	} else {
+		/* Disconnect the DP port selection mux. */
+		gpio_set_level(GPIO_DP_MUX_OE_L, 1);
+
+		/* Disconnect the SBU lines in PPC chip. */
+		if (IS_ENABLED(CONFIG_USBC_PPC_SBU))
+			ppc_set_sbu(port, 0);
+
+		/* Disconnect the DP but keep the USB SS lines in TCPC chip. */
+		usb_mux_set(port, USB_PD_MUX_USB_ENABLED,
+			    USB_SWITCH_CONNECT, pd_get_polarity(port));
+	}
+
+	if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND) &&
+	    (irq || lvl))
+		/*
+		 * Wake up the AP.  IRQ or level high indicates a DP sink is now
+		 * present.
+		 */
+		pd_notify_dp_alt_mode_entry();
+
+	/* Configure TCPC for the HPD event, for proper muxing */
+	usb_mux_hpd_update(port, lvl, irq);
+
+	/* Signal AP for the HPD event, through GPIO to AP */
+	if (irq & cur_lvl) {
+		uint64_t now = get_time().val;
+		/* Wait for the minimum spacing between IRQ_HPD if needed */
+		if (now < svdm_hpd_deadline[port])
+			usleep(svdm_hpd_deadline[port] - now);
+
+		/* Generate IRQ_HPD pulse */
+		gpio_set_level(hpd, 0);
+		usleep(HPD_DSTREAM_DEBOUNCE_IRQ);
+		gpio_set_level(hpd, 1);
+
+		/* Set the minimum time delay (2ms) for the next HPD IRQ */
+		svdm_hpd_deadline[port] = get_time().val +
+			HPD_USTREAM_DEBOUNCE_LVL;
+	} else if (irq & !lvl) {
+		CPRINTF("ERR:HPD:IRQ&LOW\n");
+		return 0;  /* Nak */
+	} else {
+		gpio_set_level(hpd, lvl);
+		/* Set the minimum time delay (2ms) for the next HPD IRQ */
+		svdm_hpd_deadline[port] = get_time().val +
+			HPD_USTREAM_DEBOUNCE_LVL;
+	}
+
+	return 1;  /* Ack */
+}
+
+__override void svdm_exit_dp_mode(int port)
+{
+	/* Disconnect the DP port selection mux. */
+	gpio_set_level(GPIO_DP_MUX_OE_L, 1);
+
+	/* Below svdm_safe_dp_mode() will disconnect SBU and DP/USB SS lines. */
+	svdm_safe_dp_mode(port);
+
+	/* Signal AP for the HPD low event */
+	usb_mux_hpd_update(port, 0, 0);
+	gpio_set_level(GPIO_DP_HOT_PLUG_DET, 0);
+}
+#endif /* CONFIG_USB_PD_ALT_MODE_DFP */