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Date: Mon, 1 Mar 2021 17:10:21 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Guido Günther <agx@...xcpu.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 2/4] usb: typec: tps6598x: Add trace event for status
register
On Mon, Feb 15, 2021 at 12:46:43PM +0100, Guido Günther wrote:
> This allows to trace status information which helps to debug problems
> with role switching, etc.
>
> We don't use the generic FIELD_GET() to reduce the macro size since we
> otherwise trip up sparse.
>
> Signed-off-by: Guido Günther <agx@...xcpu.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
> drivers/usb/typec/tps6598x.c | 26 ++++-----
> drivers/usb/typec/tps6598x.h | 68 +++++++++++++++++++++
> drivers/usb/typec/tps6598x_trace.h | 94 ++++++++++++++++++++++++++++++
> 3 files changed, 173 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
> index bc34b35e909f..559aa175f948 100644
> --- a/drivers/usb/typec/tps6598x.c
> +++ b/drivers/usb/typec/tps6598x.c
> @@ -37,13 +37,6 @@
> #define TPS_REG_POWER_STATUS 0x3f
> #define TPS_REG_RX_IDENTITY_SOP 0x48
>
> -/* TPS_REG_STATUS bits */
> -#define TPS_STATUS_PLUG_PRESENT BIT(0)
> -#define TPS_STATUS_ORIENTATION BIT(4)
> -#define TPS_STATUS_PORTROLE(s) (!!((s) & BIT(5)))
> -#define TPS_STATUS_DATAROLE(s) (!!((s) & BIT(6)))
> -#define TPS_STATUS_VCONN(s) (!!((s) & BIT(7)))
> -
> /* TPS_REG_SYSTEM_CONF bits */
> #define TPS_SYSCONF_PORTINFO(c) ((c) & 7)
>
> @@ -258,9 +251,9 @@ static int tps6598x_connect(struct tps6598x *tps, u32 status)
> }
>
> typec_set_pwr_opmode(tps->port, mode);
> - typec_set_pwr_role(tps->port, TPS_STATUS_PORTROLE(status));
> - typec_set_vconn_role(tps->port, TPS_STATUS_VCONN(status));
> - tps6598x_set_data_role(tps, TPS_STATUS_DATAROLE(status), true);
> + typec_set_pwr_role(tps->port, TPS_STATUS_TO_TYPEC_PORTROLE(status));
> + typec_set_vconn_role(tps->port, TPS_STATUS_TO_TYPEC_VCONN(status));
> + tps6598x_set_data_role(tps, TPS_STATUS_TO_TYPEC_DATAROLE(status), true);
>
> tps->partner = typec_register_partner(tps->port, &desc);
> if (IS_ERR(tps->partner))
> @@ -280,9 +273,10 @@ static void tps6598x_disconnect(struct tps6598x *tps, u32 status)
> typec_unregister_partner(tps->partner);
> tps->partner = NULL;
> typec_set_pwr_opmode(tps->port, TYPEC_PWR_MODE_USB);
> - typec_set_pwr_role(tps->port, TPS_STATUS_PORTROLE(status));
> - typec_set_vconn_role(tps->port, TPS_STATUS_VCONN(status));
> - tps6598x_set_data_role(tps, TPS_STATUS_DATAROLE(status), false);
> + typec_set_pwr_role(tps->port, TPS_STATUS_TO_TYPEC_PORTROLE(status));
> + typec_set_vconn_role(tps->port, TPS_STATUS_TO_TYPEC_VCONN(status));
> + tps6598x_set_data_role(tps, TPS_STATUS_TO_TYPEC_DATAROLE(status), false);
> +
> power_supply_changed(tps->psy);
> }
>
> @@ -366,7 +360,7 @@ static int tps6598x_dr_set(struct typec_port *port, enum typec_data_role role)
> if (ret)
> goto out_unlock;
>
> - if (role != TPS_STATUS_DATAROLE(status)) {
> + if (role != TPS_STATUS_TO_TYPEC_DATAROLE(status)) {
> ret = -EPROTO;
> goto out_unlock;
> }
> @@ -396,7 +390,7 @@ static int tps6598x_pr_set(struct typec_port *port, enum typec_role role)
> if (ret)
> goto out_unlock;
>
> - if (role != TPS_STATUS_PORTROLE(status)) {
> + if (role != TPS_STATUS_TO_TYPEC_PORTROLE(status)) {
> ret = -EPROTO;
> goto out_unlock;
> }
> @@ -437,6 +431,7 @@ static irqreturn_t tps6598x_interrupt(int irq, void *data)
> dev_err(tps->dev, "%s: failed to read status\n", __func__);
> goto err_clear_ints;
> }
> + trace_tps6598x_status(status);
>
> /* Handle plug insert or removal */
> if ((event1 | event2) & TPS_REG_INT_PLUG_EVENT) {
> @@ -612,6 +607,7 @@ static int tps6598x_probe(struct i2c_client *client)
> ret = tps6598x_read32(tps, TPS_REG_STATUS, &status);
> if (ret < 0)
> return ret;
> + trace_tps6598x_status(status);
>
> ret = tps6598x_read32(tps, TPS_REG_SYSTEM_CONF, &conf);
> if (ret < 0)
> diff --git a/drivers/usb/typec/tps6598x.h b/drivers/usb/typec/tps6598x.h
> index b83b8a6a1504..621fb336c15d 100644
> --- a/drivers/usb/typec/tps6598x.h
> +++ b/drivers/usb/typec/tps6598x.h
> @@ -12,6 +12,74 @@
> #ifndef __TPS6598X_H__
> #define __TPS6598X_H__
>
> +#define TPS_FIELD_GET(_mask, _reg) ((typeof(_mask))(((_reg) & (_mask)) >> __bf_shf(_mask)))
> +
> +/* TPS_REG_STATUS bits */
> +#define TPS_STATUS_PLUG_PRESENT BIT(0)
> +#define TPS_STATUS_PLUG_UPSIDE_DOWN BIT(4)
> +#define TPS_STATUS_PORTROLE BIT(5)
> +#define TPS_STATUS_TO_TYPEC_PORTROLE(s) (!!((s) & TPS_STATUS_PORTROLE))
> +#define TPS_STATUS_DATAROLE BIT(6)
> +#define TPS_STATUS_TO_TYPEC_DATAROLE(s) (!!((s) & TPS_STATUS_DATAROLE))
> +#define TPS_STATUS_VCONN BIT(7)
> +#define TPS_STATUS_TO_TYPEC_VCONN(s) (!!((s) & TPS_STATUS_VCONN))
> +#define TPS_STATUS_OVERCURRENT BIT(16)
> +#define TPS_STATUS_GOTO_MIN_ACTIVE BIT(26)
> +#define TPS_STATUS_BIST BIT(27)
> +#define TPS_STATUS_HIGH_VOLAGE_WARNING BIT(28)
> +#define TPS_STATUS_HIGH_LOW_VOLTAGE_WARNING BIT(29)
> +
> +#define TPS_STATUS_CONN_STATE_MASK GENMASK(3, 1)
> +#define TPS_STATUS_CONN_STATE(x) TPS_FIELD_GET(TPS_STATUS_CONN_STATE_MASK, (x))
> +#define TPS_STATUS_PP_5V0_SWITCH_MASK GENMASK(9, 8)
> +#define TPS_STATUS_PP_5V0_SWITCH(x) TPS_FIELD_GET(TPS_STATUS_PP_5V0_SWITCH_MASK, (x))
> +#define TPS_STATUS_PP_HV_SWITCH_MASK GENMASK(11, 10)
> +#define TPS_STATUS_PP_HV_SWITCH(x) TPS_FIELD_GET(TPS_STATUS_PP_HV_SWITCH_MASK, (x))
> +#define TPS_STATUS_PP_EXT_SWITCH_MASK GENMASK(13, 12)
> +#define TPS_STATUS_PP_EXT_SWITCH(x) TPS_FIELD_GET(TPS_STATUS_PP_EXT_SWITCH_MASK, (x))
> +#define TPS_STATUS_PP_CABLE_SWITCH_MASK GENMASK(15, 14)
> +#define TPS_STATUS_PP_CABLE_SWITCH(x) TPS_FIELD_GET(TPS_STATUS_PP_CABLE_SWITCH_MASK, (x))
> +#define TPS_STATUS_POWER_SOURCE_MASK GENMASK(19, 18)
> +#define TPS_STATUS_POWER_SOURCE(x) TPS_FIELD_GET(TPS_STATUS_POWER_SOURCE_MASK, (x))
> +#define TPS_STATUS_VBUS_STATUS_MASK GENMASK(21, 20)
> +#define TPS_STATUS_VBUS_STATUS(x) TPS_FIELD_GET(TPS_STATUS_VBUS_STATUS_MASK, (x))
> +#define TPS_STATUS_USB_HOST_PRESENT_MASK GENMASK(23, 22)
> +#define TPS_STATUS_USB_HOST_PRESENT(x) TPS_FIELD_GET(TPS_STATUS_USB_HOST_PRESENT_MASK, (x))
> +#define TPS_STATUS_LEGACY_MASK GENMASK(25, 24)
> +#define TPS_STATUS_LEGACY(x) TPS_FIELD_GET(TPS_STATUS_LEGACY_MASK, (x))
> +
> +#define TPS_STATUS_CONN_STATE_NO_CONN 0
> +#define TPS_STATUS_CONN_STATE_DISABLED 1
> +#define TPS_STATUS_CONN_STATE_AUDIO_CONN 2
> +#define TPS_STATUS_CONN_STATE_DEBUG_CONN 3
> +#define TPS_STATUS_CONN_STATE_NO_CONN_R_A 4
> +#define TPS_STATUS_CONN_STATE_RESERVED 5
> +#define TPS_STATUS_CONN_STATE_CONN_NO_R_A 6
> +#define TPS_STATUS_CONN_STATE_CONN_WITH_R_A 7
> +
> +#define TPS_STATUS_PP_SWITCH_STATE_DISABLED 0
> +#define TPS_STATUS_PP_SWITCH_STATE_FAULT 1
> +#define TPS_STATUS_PP_SWITCH_STATE_OUT 2
> +#define TPS_STATUS_PP_SWITCH_STATE_IN 3
> +
> +#define TPS_STATUS_POWER_SOURCE_UNKNOWN 0
> +#define TPS_STATUS_POWER_SOURCE_VIN_3P3 1
> +#define TPS_STATUS_POWER_SOURCE_DEAD_BAT 2
> +#define TPS_STATUS_POWER_SOURCE_VBUS 3
> +
> +#define TPS_STATUS_VBUS_STATUS_VSAFE0V 0
> +#define TPS_STATUS_VBUS_STATUS_VSAFE5V 1
> +#define TPS_STATUS_VBUS_STATUS_PD 2
> +#define TPS_STATUS_VBUS_STATUS_FAULT 3
> +
> +#define TPS_STATUS_USB_HOST_PRESENT_NO 0
> +#define TPS_STATUS_USB_HOST_PRESENT_PD_NO_USB 1
> +#define TPS_STATUS_USB_HOST_PRESENT_NO_PD 2
> +#define TPS_STATUS_USB_HOST_PRESENT_PD_USB 3
> +
> +#define TPS_STATUS_LEGACY_NO 0
> +#define TPS_STATUS_LEGACY_SINK 1
> +#define TPS_STATUS_LEGACY_SOURCE 2
>
> /* TPS_REG_INT_* bits */
> #define TPS_REG_INT_USER_VID_ALT_MODE_OTHER_VDM BIT_ULL(27+32)
> diff --git a/drivers/usb/typec/tps6598x_trace.h b/drivers/usb/typec/tps6598x_trace.h
> index 4ec96e3b2c3e..e0677b9c5c53 100644
> --- a/drivers/usb/typec/tps6598x_trace.h
> +++ b/drivers/usb/typec/tps6598x_trace.h
> @@ -67,6 +67,73 @@
> { 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" })
>
> +#define TPS6598X_STATUS_FLAGS_MASK (GENMASK(31, 0) ^ (TPS_STATUS_CONN_STATE_MASK | \
> + TPS_STATUS_PP_5V0_SWITCH_MASK | \
> + TPS_STATUS_PP_HV_SWITCH_MASK | \
> + TPS_STATUS_PP_EXT_SWITCH_MASK | \
> + TPS_STATUS_PP_CABLE_SWITCH_MASK | \
> + TPS_STATUS_POWER_SOURCE_MASK | \
> + TPS_STATUS_VBUS_STATUS_MASK | \
> + TPS_STATUS_USB_HOST_PRESENT_MASK | \
> + TPS_STATUS_LEGACY_MASK))
> +
> +#define show_status_conn_state(status) \
> + __print_symbolic(TPS_STATUS_CONN_STATE((status)), \
> + { TPS_STATUS_CONN_STATE_CONN_WITH_R_A, "conn-Ra" }, \
> + { TPS_STATUS_CONN_STATE_CONN_NO_R_A, "conn-no-Ra" }, \
> + { TPS_STATUS_CONN_STATE_NO_CONN_R_A, "no-conn-Ra" }, \
> + { TPS_STATUS_CONN_STATE_DEBUG_CONN, "debug" }, \
> + { TPS_STATUS_CONN_STATE_AUDIO_CONN, "audio" }, \
> + { TPS_STATUS_CONN_STATE_DISABLED, "disabled" }, \
> + { TPS_STATUS_CONN_STATE_NO_CONN, "no-conn" })
> +
> +#define show_status_pp_switch_state(status) \
> + __print_symbolic(status, \
> + { TPS_STATUS_PP_SWITCH_STATE_IN, "in" }, \
> + { TPS_STATUS_PP_SWITCH_STATE_OUT, "out" }, \
> + { TPS_STATUS_PP_SWITCH_STATE_FAULT, "fault" }, \
> + { TPS_STATUS_PP_SWITCH_STATE_DISABLED, "off" })
> +
> +#define show_status_power_sources(status) \
> + __print_symbolic(TPS_STATUS_POWER_SOURCE(status), \
> + { TPS_STATUS_POWER_SOURCE_VBUS, "vbus" }, \
> + { TPS_STATUS_POWER_SOURCE_VIN_3P3, "vin-3p3" }, \
> + { TPS_STATUS_POWER_SOURCE_DEAD_BAT, "dead-battery" }, \
> + { TPS_STATUS_POWER_SOURCE_UNKNOWN, "unknown" })
> +
> +#define show_status_vbus_status(status) \
> + __print_symbolic(TPS_STATUS_VBUS_STATUS(status), \
> + { TPS_STATUS_VBUS_STATUS_VSAFE0V, "vSafe0V" }, \
> + { TPS_STATUS_VBUS_STATUS_VSAFE5V, "vSafe5V" }, \
> + { TPS_STATUS_VBUS_STATUS_PD, "pd" }, \
> + { TPS_STATUS_VBUS_STATUS_FAULT, "fault" })
> +
> +#define show_status_usb_host_present(status) \
> + __print_symbolic(TPS_STATUS_USB_HOST_PRESENT(status), \
> + { TPS_STATUS_USB_HOST_PRESENT_PD_USB, "pd-usb" }, \
> + { TPS_STATUS_USB_HOST_PRESENT_NO_PD, "no-pd" }, \
> + { TPS_STATUS_USB_HOST_PRESENT_PD_NO_USB, "pd-no-usb" }, \
> + { TPS_STATUS_USB_HOST_PRESENT_NO, "no" })
> +
> +#define show_status_legacy(status) \
> + __print_symbolic(TPS_STATUS_LEGACY(status), \
> + { TPS_STATUS_LEGACY_SOURCE, "source" }, \
> + { TPS_STATUS_LEGACY_SINK, "sink" }, \
> + { TPS_STATUS_LEGACY_NO, "no" })
> +
> +#define show_status_flags(flags) \
> + __print_flags((flags & TPS6598X_STATUS_FLAGS_MASK), "|", \
> + { TPS_STATUS_PLUG_PRESENT, "PLUG_PRESENT" }, \
> + { TPS_STATUS_PLUG_UPSIDE_DOWN, "UPSIDE_DOWN" }, \
> + { TPS_STATUS_PORTROLE, "PORTROLE" }, \
> + { TPS_STATUS_DATAROLE, "DATAROLE" }, \
> + { TPS_STATUS_VCONN, "VCONN" }, \
> + { TPS_STATUS_OVERCURRENT, "OVERCURRENT" }, \
> + { TPS_STATUS_GOTO_MIN_ACTIVE, "GOTO_MIN_ACTIVE" }, \
> + { TPS_STATUS_BIST, "BIST" }, \
> + { TPS_STATUS_HIGH_VOLAGE_WARNING, "HIGH_VOLAGE_WARNING" }, \
> + { TPS_STATUS_HIGH_LOW_VOLTAGE_WARNING, "HIGH_LOW_VOLTAGE_WARNING" })
> +
> TRACE_EVENT(tps6598x_irq,
> TP_PROTO(u64 event1,
> u64 event2),
> @@ -87,6 +154,33 @@ TRACE_EVENT(tps6598x_irq,
> show_irq_flags(__entry->event2))
> );
>
> +TRACE_EVENT(tps6598x_status,
> + TP_PROTO(u32 status),
> + TP_ARGS(status),
> +
> + TP_STRUCT__entry(
> + __field(u32, status)
> + ),
> +
> + TP_fast_assign(
> + __entry->status = status;
> + ),
> +
> + TP_printk("conn: %s, pp_5v0: %s, pp_hv: %s, pp_ext: %s, pp_cable: %s, "
> + "pwr-src: %s, vbus: %s, usb-host: %s, legacy: %s, flags: %s",
> + show_status_conn_state(__entry->status),
> + show_status_pp_switch_state(TPS_STATUS_PP_5V0_SWITCH(__entry->status)),
> + show_status_pp_switch_state(TPS_STATUS_PP_HV_SWITCH(__entry->status)),
> + show_status_pp_switch_state(TPS_STATUS_PP_EXT_SWITCH(__entry->status)),
> + show_status_pp_switch_state(TPS_STATUS_PP_CABLE_SWITCH(__entry->status)),
> + show_status_power_sources(__entry->status),
> + show_status_vbus_status(__entry->status),
> + show_status_usb_host_present(__entry->status),
> + show_status_legacy(__entry->status),
> + show_status_flags(__entry->status)
> + )
> +);
> +
> #endif /* _TPS6598X_TRACE_H_ */
>
> /* This part must be outside protection */
> --
> 2.30.0
thanks,
--
heikki
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