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authorHans de Goede <hdegoede@redhat.com>2018-03-20 15:57:06 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-22 13:40:10 +0100
commitc6962c29729cc64177f56a466766daa7de9f87ac (patch)
treec08521ad2213d5a7086ab56f3dbb7078b17c19b1 /drivers/usb
parentceeb162500c3480b660a47d509db7955a7913271 (diff)
downloadlinux-c6962c29729cc64177f56a466766daa7de9f87ac.tar.bz2
usb: typec: tcpm: Set USB role switch to device mode when configured as such
Setting the mux to MUX_NONE and the switch to USB_SWITCH_DISCONNECT when the data-role is device is not correct. Plenty of devices support operating as USB device through a (separate) USB device controller. We really need 2 different versions of USB_SWITCH_CONNECT, USB_SWITCH_CONNECT_HOST and USB_SWITCH_DEVICE. Rather then modifying the tcpc_usb_switch enum for this, simply remove it and switch to the usb_role enum which provides exactly this, this will save use needing to convert betweent the 2 enums when calling an usb-role-switch driver later. Besides switching to the usb_role type, this commit also actually sets the mux to TYPEC_MUX_USB and the switch to USB_ROLE_DEVICE instead of setting both to none when the data-role is device. This commit also makes tcpm_reset_port() call tcpm_mux_set(port, TYPEC_MUX_NONE, USB_ROLE_NONE) so that the mux and switch do _not_ stay in their last mode after a detach. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/typec/tcpm.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index 62e710bb6367..2519b0d17f1f 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -604,15 +604,15 @@ 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 tcpc_usb_switch config)
+ enum usb_role usb_role)
{
int ret = 0;
- tcpm_log(port, "Requesting mux mode %d, config %d, polarity %d",
- mode, config, port->polarity);
+ tcpm_log(port, "Requesting mux mode %d, usb-role %d, polarity %d",
+ mode, usb_role, port->polarity);
if (port->tcpc->mux)
- ret = port->tcpc->mux->set(port->tcpc->mux, mode, config,
+ ret = port->tcpc->mux->set(port->tcpc->mux, mode, usb_role,
port->polarity);
return ret;
@@ -728,14 +728,15 @@ 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 usb_role usb_role;
int ret;
if (data == TYPEC_HOST)
- ret = tcpm_mux_set(port, TYPEC_MUX_USB,
- TCPC_USB_SWITCH_CONNECT);
+ usb_role = USB_ROLE_HOST;
else
- ret = tcpm_mux_set(port, TYPEC_MUX_NONE,
- TCPC_USB_SWITCH_DISCONNECT);
+ usb_role = USB_ROLE_DEVICE;
+
+ ret = tcpm_mux_set(port, TYPEC_MUX_USB, usb_role);
if (ret < 0)
return ret;
@@ -2028,7 +2029,7 @@ out_disable_vconn:
out_disable_pd:
port->tcpc->set_pd_rx(port->tcpc, false);
out_disable_mux:
- tcpm_mux_set(port, TYPEC_MUX_NONE, TCPC_USB_SWITCH_DISCONNECT);
+ tcpm_mux_set(port, TYPEC_MUX_NONE, USB_ROLE_NONE);
return ret;
}
@@ -2072,6 +2073,7 @@ 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_set_attached_state(port, false);
port->try_src_count = 0;
port->try_snk_count = 0;
@@ -2122,8 +2124,6 @@ static int tcpm_snk_attach(struct tcpm_port *port)
static void tcpm_snk_detach(struct tcpm_port *port)
{
tcpm_detach(port);
-
- /* XXX: (Dis)connect SuperSpeed mux? */
}
static int tcpm_acc_attach(struct tcpm_port *port)