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Date: Sun, 25 Feb 2018 13:38:54 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Hans de Goede <hdegoede@...hat.com>,
Darren Hart <dvhart@...radead.org>,
Andy Shevchenko <andy@...radead.org>,
MyungJoo Ham <myungjoo.ham@...sung.com>,
Chanwoo Choi <cw00.choi@...sung.com>,
Mathias Nyman <mathias.nyman@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-usb@...r.kernel.org
Subject: Re: [PATCH v2 06/12] usb: typec: tcpm: Use new Type-C switch/mux and
usb-role-switch functions
On 02/25/2018 07:25 AM, Hans de Goede wrote:
> Remove the unused (not implemented anywhere) tcpc_mux_dev abstraction
> and replace it with calling the new typec_set_orientation,
> usb_role_switch_set and typec_set_mode functions.
>
> Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
> ---
> Changes in v2:
> -Added Heikki's Reviewed-by
> ---
> drivers/usb/typec/Kconfig | 1 +
> drivers/usb/typec/fusb302/fusb302.c | 1 -
> drivers/usb/typec/tcpm.c | 46 ++++++++++++++++++++++++++++---------
> include/linux/usb/tcpm.h | 10 --------
> 4 files changed, 36 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig
> index bcb2744c5977..a2a0684e7c82 100644
> --- a/drivers/usb/typec/Kconfig
> +++ b/drivers/usb/typec/Kconfig
> @@ -48,6 +48,7 @@ if TYPEC
> config TYPEC_TCPM
> tristate "USB Type-C Port Controller Manager"
> depends on USB
> + select USB_ROLE_SWITCH
> help
> The Type-C Port Controller Manager provides a USB PD and USB Type-C
> state machine for use with Type-C Port Controllers.
> diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c
> index dcd8ef085b30..a7b06053a538 100644
> --- a/drivers/usb/typec/fusb302/fusb302.c
> +++ b/drivers/usb/typec/fusb302/fusb302.c
> @@ -1249,7 +1249,6 @@ static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
> fusb302_tcpc_dev->set_roles = tcpm_set_roles;
> fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling;
> fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit;
> - fusb302_tcpc_dev->mux = NULL;
> }
>
> static const char * const cc_polarity_name[] = {
> diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
> index 00ca2822432f..bfcaf6618a1f 100644
> --- a/drivers/usb/typec/tcpm.c
> +++ b/drivers/usb/typec/tcpm.c
> @@ -20,6 +20,7 @@
> #include <linux/usb/pd.h>
> #include <linux/usb/pd_bdo.h>
> #include <linux/usb/pd_vdo.h>
> +#include <linux/usb/role.h>
> #include <linux/usb/tcpm.h>
> #include <linux/usb/typec.h>
> #include <linux/workqueue.h>
> @@ -176,6 +177,7 @@ struct tcpm_port {
> struct typec_port *typec_port;
>
> struct tcpc_dev *tcpc;
> + struct usb_role_switch *role_sw;
>
> enum typec_role vconn_role;
> enum typec_role pwr_role;
> @@ -618,18 +620,25 @@ void tcpm_pd_transmit_complete(struct tcpm_port *port,
> EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
>
> static int tcpm_mux_set(struct tcpm_port *port, enum tcpc_mux_mode mode,
> - enum usb_role usb_role)
> + enum usb_role usb_role,
> + enum typec_orientation orientation)
> {
> - int ret = 0;
> + int ret;
>
> - tcpm_log(port, "Requesting mux mode %d, usb-role %d, polarity %d",
> - mode, usb_role, port->polarity);
> + tcpm_log(port, "Requesting mux mode %d, usb-role %d, orientation %d",
> + mode, usb_role, orientation);
>
> - if (port->tcpc->mux)
> - ret = port->tcpc->mux->set(port->tcpc->mux, mode, usb_role,
> - port->polarity);
> + ret = typec_set_orientation(port->typec_port, orientation);
> + if (ret)
> + return ret;
>
> - return ret;
> + if (port->role_sw) {
> + ret = usb_role_switch_set_role(port->role_sw, usb_role);
> + if (ret)
> + return ret;
> + }
> +
> + return typec_set_mode(port->typec_port, mode);
> }
>
> static int tcpm_set_polarity(struct tcpm_port *port,
> @@ -742,15 +751,21 @@ static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
> static int tcpm_set_roles(struct tcpm_port *port, bool attached,
> enum typec_role role, enum typec_data_role data)
> {
> + enum typec_orientation orientation;
> enum usb_role usb_role;
> int ret;
>
> + if (port->polarity == TYPEC_POLARITY_CC1)
> + orientation = TYPEC_ORIENTATION_NORMAL;
> + else
> + orientation = TYPEC_ORIENTATION_REVERSE;
> +
> if (data == TYPEC_HOST)
> usb_role = USB_ROLE_HOST;
> else
> usb_role = USB_ROLE_DEVICE;
>
> - ret = tcpm_mux_set(port, TYPEC_MUX_USB, usb_role);
> + ret = tcpm_mux_set(port, TYPEC_MUX_USB, usb_role, orientation);
> if (ret < 0)
> return ret;
>
> @@ -2097,7 +2112,8 @@ static int tcpm_src_attach(struct tcpm_port *port)
> out_disable_pd:
> port->tcpc->set_pd_rx(port->tcpc, false);
> out_disable_mux:
> - tcpm_mux_set(port, TYPEC_MUX_NONE, USB_ROLE_NONE);
> + tcpm_mux_set(port, TYPEC_MUX_NONE, USB_ROLE_NONE,
> + TYPEC_ORIENTATION_NONE);
> return ret;
> }
>
> @@ -2141,7 +2157,8 @@ static void tcpm_reset_port(struct tcpm_port *port)
> tcpm_init_vconn(port);
> tcpm_set_current_limit(port, 0, 0);
> tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
> - tcpm_mux_set(port, TYPEC_MUX_NONE, USB_ROLE_NONE);
> + tcpm_mux_set(port, TYPEC_MUX_NONE, USB_ROLE_NONE,
> + TYPEC_ORIENTATION_NONE);
> tcpm_set_attached_state(port, false);
> port->try_src_count = 0;
> port->try_snk_count = 0;
> @@ -3742,6 +3759,12 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
> port->partner_desc.identity = &port->partner_ident;
> port->port_type = tcpc->config->type;
>
> + port->role_sw = usb_role_switch_get(port->dev);
> + if (IS_ERR(port->role_sw)) {
> + err = PTR_ERR(port->role_sw);
> + goto out_destroy_wq;
> + }
> +
> port->typec_port = typec_register_port(port->dev, &port->typec_caps);
> if (IS_ERR(port->typec_port)) {
> err = PTR_ERR(port->typec_port);
> @@ -3777,6 +3800,7 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
> return port;
>
> out_destroy_wq:
> + usb_role_switch_put(port->role_sw);
> destroy_workqueue(port->wq);
> return ERR_PTR(err);
> }
> diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
> index 268721bff2c1..fe3508e6e1df 100644
> --- a/include/linux/usb/tcpm.h
> +++ b/include/linux/usb/tcpm.h
> @@ -16,7 +16,6 @@
> #define __LINUX_USB_TCPM_H
>
> #include <linux/bitops.h>
> -#include <linux/usb/role.h>
> #include <linux/usb/typec.h>
> #include "pd.h"
>
> @@ -112,14 +111,6 @@ enum tcpc_mux_mode {
> TCPC_MUX_DP_ENABLED,
> };
>
> -struct tcpc_mux_dev {
> - int (*set)(struct tcpc_mux_dev *dev, enum tcpc_mux_mode mux_mode,
> - enum usb_role usb_role,
> - enum typec_cc_polarity polarity);
> - bool dfp_only;
> - void *priv_data;
> -};
> -
> /**
> * struct tcpc_dev - Port configuration and callback functions
> * @config: Pointer to port configuration
> @@ -171,7 +162,6 @@ struct tcpc_dev {
> int (*try_role)(struct tcpc_dev *dev, int role);
> int (*pd_transmit)(struct tcpc_dev *dev, enum tcpm_transmit_type type,
> const struct pd_message *msg);
> - struct tcpc_mux_dev *mux;
> };
>
> struct tcpm_port;
>
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