[PATCH v3 06/12] usb: typec: tcpm: Use new Type-C switch/mux and usb-role-switch functions

Hans de Goede
2018-02-26T09:09:19Z

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@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
Changes in v3:
-Add Guenter's Reviewed-by

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;
--
2.14.3