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Message-Id: <1a430ea9630fefbcdf9628c4b64fe5366ed4a6df.1613058605.git.agx@sigxcpu.org>
Date: Thu, 11 Feb 2021 16:51:02 +0100
From: Guido Günther <agx@...xcpu.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: [PATCH v1 1/4] usb: typec: tps6598x: Add trace event for IRQ events
Allow to get irq event information via the tracing framework. This
allows to inspect USB-C negotiation at runtime.
Signed-off-by: Guido Günther <agx@...xcpu.org>
---
drivers/usb/typec/Makefile | 3 +
drivers/usb/typec/tps6598x.c | 9 ++-
drivers/usb/typec/tps6598x.h | 61 +++++++++++++++++++
drivers/usb/typec/tps6598x_trace.h | 97 ++++++++++++++++++++++++++++++
4 files changed, 167 insertions(+), 3 deletions(-)
create mode 100644 drivers/usb/typec/tps6598x.h
create mode 100644 drivers/usb/typec/tps6598x_trace.h
diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
index d03b48c4b864..27aa12129190 100644
--- a/drivers/usb/typec/Makefile
+++ b/drivers/usb/typec/Makefile
@@ -1,4 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
+# define_trace.h needs to know how to find our header
+CFLAGS_tps6598x.o := -I$(src)
+
obj-$(CONFIG_TYPEC) += typec.o
typec-y := class.o mux.o bus.o
obj-$(CONFIG_TYPEC) += altmodes/
diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
index 6e6ef6317523..bc34b35e909f 100644
--- a/drivers/usb/typec/tps6598x.c
+++ b/drivers/usb/typec/tps6598x.c
@@ -6,6 +6,8 @@
* Author: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
*/
+#include "tps6598x.h"
+
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/module.h>
@@ -15,6 +17,9 @@
#include <linux/usb/typec.h>
#include <linux/usb/role.h>
+#define CREATE_TRACE_POINTS
+#include "tps6598x_trace.h"
+
/* Register offsets */
#define TPS_REG_VID 0x00
#define TPS_REG_MODE 0x03
@@ -32,9 +37,6 @@
#define TPS_REG_POWER_STATUS 0x3f
#define TPS_REG_RX_IDENTITY_SOP 0x48
-/* TPS_REG_INT_* bits */
-#define TPS_REG_INT_PLUG_EVENT BIT(3)
-
/* TPS_REG_STATUS bits */
#define TPS_STATUS_PLUG_PRESENT BIT(0)
#define TPS_STATUS_ORIENTATION BIT(4)
@@ -428,6 +430,7 @@ static irqreturn_t tps6598x_interrupt(int irq, void *data)
dev_err(tps->dev, "%s: failed to read events\n", __func__);
goto err_unlock;
}
+ trace_tps6598x_irq(event1, event2);
ret = tps6598x_read32(tps, TPS_REG_STATUS, &status);
if (ret) {
diff --git a/drivers/usb/typec/tps6598x.h b/drivers/usb/typec/tps6598x.h
new file mode 100644
index 000000000000..3040cfdd2b8f
--- /dev/null
+++ b/drivers/usb/typec/tps6598x.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Driver for TI TPS6598x USB Power Delivery controller family
+ *
+ * Copyright (C) 2017, Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
+ */
+
+#ifndef __TPS6598X_H__
+#define __TPS6598X_H__
+
+
+/* TPS_REG_INT_* bits */
+#define TPS_REG_INT_USER_VID_ALT_MODE_OTHER_VDM BIT(27+32)
+#define TPS_REG_INT_USER_VID_ALT_MODE_ATTN_VDM BIT(26+32)
+#define TPS_REG_INT_USER_VID_ALT_MODE_EXIT BIT(25+32)
+#define TPS_REG_INT_USER_VID_ALT_MODE_ENTERED BIT(24+32)
+#define TPS_REG_INT_EXIT_MODES_COMPLETE BIT(20+32)
+#define TPS_REG_INT_DISCOVER_MODES_COMPLETE BIT(19+32)
+#define TPS_REG_INT_VDM_MSG_SENT BIT(18+32)
+#define TPS_REG_INT_VDM_ENTERED_MODE BIT(17+32)
+#define TPS_REG_INT_ERROR_UNABLE_TO_SOURCE BIT(14+32)
+#define TPS_REG_INT_SRC_TRANSITION BIT(10+32)
+#define TPS_REG_INT_ERROR_DISCHARGE_FAILED BIT(9+32)
+#define TPS_REG_INT_ERROR_MESSAGE_DATA BIT(7+32)
+#define TPS_REG_INT_ERROR_PROTOCOL_ERROR BIT(6+32)
+#define TPS_REG_INT_ERROR_MISSING_GET_CAP_MESSAGE BIT(4+32)
+#define TPS_REG_INT_ERROR_POWER_EVENT_OCCURRED BIT(3+32)
+#define TPS_REG_INT_ERROR_CAN_PROVIDE_PWR_LATER BIT(2+32)
+#define TPS_REG_INT_ERROR_CANNOT_PROVIDE_PWR BIT(1+32)
+#define TPS_REG_INT_ERROR_DEVICE_INCOMPATIBLE BIT(0+32)
+#define TPS_REG_INT_CMD2_COMPLETE BIT(31)
+#define TPS_REG_INT_CMD1_COMPLETE BIT(30)
+#define TPS_REG_INT_ADC_HIGH_THRESHOLD BIT(29)
+#define TPS_REG_INT_ADC_LOW_THRESHOLD BIT(28)
+#define TPS_REG_INT_PD_STATUS_UPDATE BIT(27)
+#define TPS_REG_INT_STATUS_UPDATE BIT(26)
+#define TPS_REG_INT_DATA_STATUS_UPDATE BIT(25)
+#define TPS_REG_INT_POWER_STATUS_UPDATE BIT(24)
+#define TPS_REG_INT_PP_SWITCH_CHANGED BIT(23)
+#define TPS_REG_INT_HIGH_VOLTAGE_WARNING BIT(22)
+#define TPS_REG_INT_USB_HOST_PRESENT_NO_LONGER BIT(21)
+#define TPS_REG_INT_USB_HOST_PRESENT BIT(20)
+#define TPS_REG_INT_GOTO_MIN_RECEIVED BIT(19)
+#define TPS_REG_INT_PR_SWAP_REQUESTED BIT(17)
+#define TPS_REG_INT_SINK_CAP_MESSAGE_READY BIT(15)
+#define TPS_REG_INT_SOURCE_CAP_MESSAGE_READY BIT(14)
+#define TPS_REG_INT_NEW_CONTRACT_AS_PROVIDER BIT(13)
+#define TPS_REG_INT_NEW_CONTRACT_AS_CONSUMER BIT(12)
+#define TPS_REG_INT_VDM_RECEIVED BIT(11)
+#define TPS_REG_INT_ATTENTION_RECEIVED BIT(10)
+#define TPS_REG_INT_OVERCURRENT BIT(9)
+#define TPS_REG_INT_BIST BIT(8)
+#define TPS_REG_INT_RDO_RECEIVED_FROM_SINK BIT(7)
+#define TPS_REG_INT_DR_SWAP_COMPLETE BIT(5)
+#define TPS_REG_INT_PR_SWAP_COMPLETE BIT(4)
+#define TPS_REG_INT_PLUG_EVENT BIT(3)
+#define TPS_REG_INT_HARD_RESET BIT(1)
+#define TPS_REG_INT_PD_SOFT_RESET BIT(0)
+
+#endif /* __TPS6598X_H__ */
diff --git a/drivers/usb/typec/tps6598x_trace.h b/drivers/usb/typec/tps6598x_trace.h
new file mode 100644
index 000000000000..1467f5180a50
--- /dev/null
+++ b/drivers/usb/typec/tps6598x_trace.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Driver for TI TPS6598x USB Power Delivery controller family
+ *
+ * Copyright (C) 2020 Purism SPC
+ * Author: Guido Günther <agx@...xcpu.org>
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM tps6598x
+
+#if !defined(_TPS6598x_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
+#define _TPS6598X_TRACE_H_
+
+#include "tps6598x.h"
+
+#include <linux/stringify.h>
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+#define show_irq_flags(flags) \
+ __print_flags(flags, "|", \
+ { TPS_REG_INT_PD_SOFT_RESET, "PD_SOFT_RESET" }, \
+ { TPS_REG_INT_HARD_RESET, "HARD_RESET" }, \
+ { TPS_REG_INT_PLUG_EVENT, "PLUG_EVENT" }, \
+ { TPS_REG_INT_PR_SWAP_COMPLETE, "PR_SWAP_COMPLETE" }, \
+ { TPS_REG_INT_DR_SWAP_COMPLETE, "DR_SWAP_COMPLETE" }, \
+ { TPS_REG_INT_RDO_RECEIVED_FROM_SINK, "RDO_RECEIVED_FROM_SINK" }, \
+ { TPS_REG_INT_BIST, "BIST" }, \
+ { TPS_REG_INT_OVERCURRENT, "OVERCURRENT" }, \
+ { TPS_REG_INT_ATTENTION_RECEIVED, "ATTENTION_RECEIVED" }, \
+ { TPS_REG_INT_VDM_RECEIVED, "VDM_RECEIVED" }, \
+ { TPS_REG_INT_NEW_CONTRACT_AS_CONSUMER, "NEW_CONTRACT_AS_CONSUMER" }, \
+ { TPS_REG_INT_NEW_CONTRACT_AS_PROVIDER, "NEW_CONTRACT_AS_PROVIDER" }, \
+ { TPS_REG_INT_SOURCE_CAP_MESSAGE_READY, "SOURCE_CAP_MESSAGE_READY" }, \
+ { TPS_REG_INT_SINK_CAP_MESSAGE_READY, "SINK_CAP_MESSAGE_READY" }, \
+ { TPS_REG_INT_PR_SWAP_REQUESTED, "PR_SWAP_REQUESTED" }, \
+ { TPS_REG_INT_GOTO_MIN_RECEIVED, "GOTO_MIN_RECEIVED" }, \
+ { TPS_REG_INT_USB_HOST_PRESENT, "USB_HOST_PRESENT" }, \
+ { TPS_REG_INT_USB_HOST_PRESENT_NO_LONGER, "USB_HOST_PRESENT_NO_LONGER" }, \
+ { TPS_REG_INT_HIGH_VOLTAGE_WARNING, "HIGH_VOLTAGE_WARNING" }, \
+ { TPS_REG_INT_PP_SWITCH_CHANGED, "PP_SWITCH_CHANGED" }, \
+ { TPS_REG_INT_POWER_STATUS_UPDATE, "POWER_STATUS_UPDATE" }, \
+ { TPS_REG_INT_DATA_STATUS_UPDATE, "DATA_STATUS_UPDATE" }, \
+ { TPS_REG_INT_STATUS_UPDATE, "STATUS_UPDATE" }, \
+ { TPS_REG_INT_PD_STATUS_UPDATE, "PD_STATUS_UPDATE" }, \
+ { TPS_REG_INT_ADC_LOW_THRESHOLD, "ADC_LOW_THRESHOLD" }, \
+ { TPS_REG_INT_ADC_HIGH_THRESHOLD, "ADC_HIGH_THRESHOLD" }, \
+ { TPS_REG_INT_CMD1_COMPLETE, "CMD1_COMPLETE" }, \
+ { TPS_REG_INT_CMD2_COMPLETE, "CMD2_COMPLETE" }, \
+ { TPS_REG_INT_ERROR_DEVICE_INCOMPATIBLE, "ERROR_DEVICE_INCOMPATIBLE" }, \
+ { TPS_REG_INT_ERROR_CANNOT_PROVIDE_PWR, "ERROR_CANNOT_PROVIDE_PWR" }, \
+ { TPS_REG_INT_ERROR_CAN_PROVIDE_PWR_LATER, "ERROR_CAN_PROVIDE_PWR_LATER" }, \
+ { TPS_REG_INT_ERROR_POWER_EVENT_OCCURRED, "ERROR_POWER_EVENT_OCCURRED" }, \
+ { TPS_REG_INT_ERROR_MISSING_GET_CAP_MESSAGE, "ERROR_MISSING_GET_CAP_MESSAGE" }, \
+ { TPS_REG_INT_ERROR_PROTOCOL_ERROR, "ERROR_PROTOCOL_ERROR" }, \
+ { TPS_REG_INT_ERROR_MESSAGE_DATA, "ERROR_MESSAGE_DATA" }, \
+ { TPS_REG_INT_ERROR_DISCHARGE_FAILED, "ERROR_DISCHARGE_FAILED" }, \
+ { TPS_REG_INT_SRC_TRANSITION, "SRC_TRANSITION" }, \
+ { TPS_REG_INT_ERROR_UNABLE_TO_SOURCE, "ERROR_UNABLE_TO_SOURCE" }, \
+ { TPS_REG_INT_VDM_ENTERED_MODE, "VDM_ENTERED_MODE" }, \
+ { TPS_REG_INT_VDM_MSG_SENT, "VDM_MSG_SENT" }, \
+ { TPS_REG_INT_DISCOVER_MODES_COMPLETE, "DISCOVER_MODES_COMPLETE" }, \
+ { TPS_REG_INT_EXIT_MODES_COMPLETE, "EXIT_MODES_COMPLETE" }, \
+ { TPS_REG_INT_USER_VID_ALT_MODE_ENTERED, "USER_VID_ALT_MODE_ENTERED" }, \
+ { TPS_REG_INT_USER_VID_ALT_MODE_EXIT, "USER_VID_ALT_MODE_EXIT" }, \
+ { TPS_REG_INT_USER_VID_ALT_MODE_ATTN_VDM, "USER_VID_ALT_MODE_ATTN_VDM" }, \
+ { TPS_REG_INT_USER_VID_ALT_MODE_OTHER_VDM, "USER_VID_ALT_MODE_OTHER_VDM" })
+
+TRACE_EVENT(tps6598x_irq,
+ TP_PROTO(u64 event1,
+ u64 event2),
+ TP_ARGS(event1, event2),
+
+ TP_STRUCT__entry(
+ __field(u64, event1)
+ __field(u64, event2)
+ ),
+
+ TP_fast_assign(
+ __entry->event1 = event1;
+ __entry->event2 = event2;
+ ),
+
+ TP_printk("event1=%s, event2=%s",
+ show_irq_flags(__entry->event1),
+ show_irq_flags(__entry->event2))
+);
+
+#endif /* _TPS6598X_TRACE_H_ */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_FILE tps6598x_trace
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#include <trace/define_trace.h>
--
2.30.0
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