[PATCH 1/3] extcon: usbc-cros-ec: add support to notify USB type cables.
Chanwoo Choi
cw00.choi at samsung.com
Wed Dec 6 18:12:56 PST 2017
Hi Enric,
On 2017년 12월 06일 20:10, Enric Balletbo i Serra wrote:
> From: Benson Leung <bleung at chromium.org>
>
> Extend the driver to notify host and device type cables and the presence
> of power.
>
> Signed-off-by: Benson Leung <bleung at chromium.org>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo at collabora.com>
> ---
> drivers/extcon/extcon-usbc-cros-ec.c | 142 ++++++++++++++++++++++++++++++++++-
> include/linux/mfd/cros_ec_commands.h | 17 +++++
> 2 files changed, 155 insertions(+), 4 deletions(-)
Looks good to me.
After you uses the BIT() macro as the Lee's comment on v2,
I'll merge this patch.
Reviewed-by: Chanwoo Choi <cw00.choi at samsung.com>
>
> diff --git a/drivers/extcon/extcon-usbc-cros-ec.c b/drivers/extcon/extcon-usbc-cros-ec.c
> index 6187f73..6721ab0 100644
> --- a/drivers/extcon/extcon-usbc-cros-ec.c
> +++ b/drivers/extcon/extcon-usbc-cros-ec.c
> @@ -34,16 +34,26 @@ struct cros_ec_extcon_info {
>
> struct notifier_block notifier;
>
> + unsigned int dr; /* data role */
> + bool pr; /* power role (true if VBUS enabled) */
> bool dp; /* DisplayPort enabled */
> bool mux; /* SuperSpeed (usb3) enabled */
> unsigned int power_type;
> };
>
> static const unsigned int usb_type_c_cable[] = {
> + EXTCON_USB,
> + EXTCON_USB_HOST,
> EXTCON_DISP_DP,
> EXTCON_NONE,
> };
>
> +enum usb_data_roles {
> + DR_NONE,
> + DR_HOST,
> + DR_DEVICE,
> +};
> +
> /**
> * cros_ec_pd_command() - Send a command to the EC.
> * @info: pointer to struct cros_ec_extcon_info
> @@ -150,6 +160,7 @@ static int cros_ec_usb_get_role(struct cros_ec_extcon_info *info,
> pd_control.port = info->port_id;
> pd_control.role = USB_PD_CTRL_ROLE_NO_CHANGE;
> pd_control.mux = USB_PD_CTRL_MUX_NO_CHANGE;
> + pd_control.swap = USB_PD_CTRL_SWAP_NONE;
> ret = cros_ec_pd_command(info, EC_CMD_USB_PD_CONTROL, 1,
> &pd_control, sizeof(pd_control),
> &resp, sizeof(resp));
> @@ -183,11 +194,72 @@ static int cros_ec_pd_get_num_ports(struct cros_ec_extcon_info *info)
> return resp.num_ports;
> }
>
> +static const char *cros_ec_usb_role_string(unsigned int role)
> +{
> + return role == DR_NONE ? "DISCONNECTED" :
> + (role == DR_HOST ? "DFP" : "UFP");
> +}
> +
> +static const char *cros_ec_usb_power_type_string(unsigned int type)
> +{
> + switch (type) {
> + case USB_CHG_TYPE_NONE:
> + return "USB_CHG_TYPE_NONE";
> + case USB_CHG_TYPE_PD:
> + return "USB_CHG_TYPE_PD";
> + case USB_CHG_TYPE_PROPRIETARY:
> + return "USB_CHG_TYPE_PROPRIETARY";
> + case USB_CHG_TYPE_C:
> + return "USB_CHG_TYPE_C";
> + case USB_CHG_TYPE_BC12_DCP:
> + return "USB_CHG_TYPE_BC12_DCP";
> + case USB_CHG_TYPE_BC12_CDP:
> + return "USB_CHG_TYPE_BC12_CDP";
> + case USB_CHG_TYPE_BC12_SDP:
> + return "USB_CHG_TYPE_BC12_SDP";
> + case USB_CHG_TYPE_OTHER:
> + return "USB_CHG_TYPE_OTHER";
> + case USB_CHG_TYPE_VBUS:
> + return "USB_CHG_TYPE_VBUS";
> + case USB_CHG_TYPE_UNKNOWN:
> + return "USB_CHG_TYPE_UNKNOWN";
> + default:
> + return "USB_CHG_TYPE_UNKNOWN";
> + }
> +}
> +
> +static bool cros_ec_usb_power_type_is_wall_wart(unsigned int type,
> + unsigned int role)
> +{
> + switch (type) {
> + /* FIXME : Guppy, Donnettes, and other chargers will be miscategorized
> + * because they identify with USB_CHG_TYPE_C, but we can't return true
> + * here from that code because that breaks Suzy-Q and other kinds of
> + * USB Type-C cables and peripherals.
> + */
> + case USB_CHG_TYPE_PROPRIETARY:
> + case USB_CHG_TYPE_BC12_DCP:
> + return true;
> + case USB_CHG_TYPE_PD:
> + case USB_CHG_TYPE_C:
> + case USB_CHG_TYPE_BC12_CDP:
> + case USB_CHG_TYPE_BC12_SDP:
> + case USB_CHG_TYPE_OTHER:
> + case USB_CHG_TYPE_VBUS:
> + case USB_CHG_TYPE_UNKNOWN:
> + case USB_CHG_TYPE_NONE:
> + default:
> + return false;
> + }
> +}
> +
> static int extcon_cros_ec_detect_cable(struct cros_ec_extcon_info *info,
> bool force)
> {
> struct device *dev = info->dev;
> int role, power_type;
> + unsigned int dr = DR_NONE;
> + bool pr = false;
> bool polarity = false;
> bool dp = false;
> bool mux = false;
> @@ -206,9 +278,12 @@ static int extcon_cros_ec_detect_cable(struct cros_ec_extcon_info *info,
> dev_err(dev, "failed getting role err = %d\n", role);
> return role;
> }
> + dev_dbg(dev, "disconnected\n");
> } else {
> int pd_mux_state;
>
> + dr = (role & PD_CTRL_RESP_ROLE_DATA) ? DR_HOST : DR_DEVICE;
> + pr = (role & PD_CTRL_RESP_ROLE_POWER);
> pd_mux_state = cros_ec_usb_get_pd_mux_state(info);
> if (pd_mux_state < 0)
> pd_mux_state = USB_PD_MUX_USB_ENABLED;
> @@ -216,20 +291,62 @@ static int extcon_cros_ec_detect_cable(struct cros_ec_extcon_info *info,
> dp = pd_mux_state & USB_PD_MUX_DP_ENABLED;
> mux = pd_mux_state & USB_PD_MUX_USB_ENABLED;
> hpd = pd_mux_state & USB_PD_MUX_HPD_IRQ;
> - }
>
> - if (force || info->dp != dp || info->mux != mux ||
> - info->power_type != power_type) {
> + dev_dbg(dev,
> + "connected role 0x%x pwr type %d dr %d pr %d pol %d mux %d dp %d hpd %d\n",
> + role, power_type, dr, pr, polarity, mux, dp, hpd);
> + }
>
> + /*
> + * When there is no USB host (e.g. USB PD charger),
> + * we are not really a UFP for the AP.
> + */
> + if (dr == DR_DEVICE &&
> + cros_ec_usb_power_type_is_wall_wart(power_type, role))
> + dr = DR_NONE;
> +
> + if (force || info->dr != dr || info->pr != pr || info->dp != dp ||
> + info->mux != mux || info->power_type != power_type) {
> + bool host_connected = false, device_connected = false;
> +
> + dev_dbg(dev, "Type/Role switch! type = %s role = %s\n",
> + cros_ec_usb_power_type_string(power_type),
> + cros_ec_usb_role_string(dr));
> + info->dr = dr;
> + info->pr = pr;
> info->dp = dp;
> info->mux = mux;
> info->power_type = power_type;
>
> - extcon_set_state(info->edev, EXTCON_DISP_DP, dp);
> + if (dr == DR_DEVICE)
> + device_connected = true;
> + else if (dr == DR_HOST)
> + host_connected = true;
>
> + extcon_set_state(info->edev, EXTCON_USB, device_connected);
> + extcon_set_state(info->edev, EXTCON_USB_HOST, host_connected);
> + extcon_set_state(info->edev, EXTCON_DISP_DP, dp);
> + extcon_set_property(info->edev, EXTCON_USB,
> + EXTCON_PROP_USB_VBUS,
> + (union extcon_property_value)(int)pr);
> + extcon_set_property(info->edev, EXTCON_USB_HOST,
> + EXTCON_PROP_USB_VBUS,
> + (union extcon_property_value)(int)pr);
> + extcon_set_property(info->edev, EXTCON_USB,
> + EXTCON_PROP_USB_TYPEC_POLARITY,
> + (union extcon_property_value)(int)polarity);
> + extcon_set_property(info->edev, EXTCON_USB_HOST,
> + EXTCON_PROP_USB_TYPEC_POLARITY,
> + (union extcon_property_value)(int)polarity);
> extcon_set_property(info->edev, EXTCON_DISP_DP,
> EXTCON_PROP_USB_TYPEC_POLARITY,
> (union extcon_property_value)(int)polarity);
> + extcon_set_property(info->edev, EXTCON_USB,
> + EXTCON_PROP_USB_SS,
> + (union extcon_property_value)(int)mux);
> + extcon_set_property(info->edev, EXTCON_USB_HOST,
> + EXTCON_PROP_USB_SS,
> + (union extcon_property_value)(int)mux);
> extcon_set_property(info->edev, EXTCON_DISP_DP,
> EXTCON_PROP_USB_SS,
> (union extcon_property_value)(int)mux);
> @@ -237,6 +354,8 @@ static int extcon_cros_ec_detect_cable(struct cros_ec_extcon_info *info,
> EXTCON_PROP_DISP_HPD,
> (union extcon_property_value)(int)hpd);
>
> + extcon_sync(info->edev, EXTCON_USB);
> + extcon_sync(info->edev, EXTCON_USB_HOST);
> extcon_sync(info->edev, EXTCON_DISP_DP);
>
> } else if (hpd) {
> @@ -322,13 +441,28 @@ static int extcon_cros_ec_probe(struct platform_device *pdev)
> return ret;
> }
>
> + extcon_set_property_capability(info->edev, EXTCON_USB,
> + EXTCON_PROP_USB_VBUS);
> + extcon_set_property_capability(info->edev, EXTCON_USB_HOST,
> + EXTCON_PROP_USB_VBUS);
> + extcon_set_property_capability(info->edev, EXTCON_USB,
> + EXTCON_PROP_USB_TYPEC_POLARITY);
> + extcon_set_property_capability(info->edev, EXTCON_USB_HOST,
> + EXTCON_PROP_USB_TYPEC_POLARITY);
> extcon_set_property_capability(info->edev, EXTCON_DISP_DP,
> EXTCON_PROP_USB_TYPEC_POLARITY);
> + extcon_set_property_capability(info->edev, EXTCON_USB,
> + EXTCON_PROP_USB_SS);
> + extcon_set_property_capability(info->edev, EXTCON_USB_HOST,
> + EXTCON_PROP_USB_SS);
> extcon_set_property_capability(info->edev, EXTCON_DISP_DP,
> EXTCON_PROP_USB_SS);
> extcon_set_property_capability(info->edev, EXTCON_DISP_DP,
> EXTCON_PROP_DISP_HPD);
>
> + info->dr = DR_NONE;
> + info->pr = false;
> +
> platform_set_drvdata(pdev, info);
>
> /* Get PD events from the EC */
> diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
> index 2b16e95..c907353 100644
> --- a/include/linux/mfd/cros_ec_commands.h
> +++ b/include/linux/mfd/cros_ec_commands.h
> @@ -2904,16 +2904,33 @@ enum usb_pd_control_mux {
> USB_PD_CTRL_MUX_AUTO = 5,
> };
>
> +enum usb_pd_control_swap {
> + USB_PD_CTRL_SWAP_NONE = 0,
> + USB_PD_CTRL_SWAP_DATA = 1,
> + USB_PD_CTRL_SWAP_POWER = 2,
> + USB_PD_CTRL_SWAP_VCONN = 3,
> + USB_PD_CTRL_SWAP_COUNT
> +};
> +
> struct ec_params_usb_pd_control {
> uint8_t port;
> uint8_t role;
> uint8_t mux;
> + uint8_t swap;
> } __packed;
>
> #define PD_CTRL_RESP_ENABLED_COMMS (1 << 0) /* Communication enabled */
> #define PD_CTRL_RESP_ENABLED_CONNECTED (1 << 1) /* Device connected */
> #define PD_CTRL_RESP_ENABLED_PD_CAPABLE (1 << 2) /* Partner is PD capable */
>
> +#define PD_CTRL_RESP_ROLE_POWER (1 << 0) /* 0=SNK/1=SRC */
> +#define PD_CTRL_RESP_ROLE_DATA (1 << 1) /* 0=UFP/1=DFP */
> +#define PD_CTRL_RESP_ROLE_VCONN (1 << 2) /* Vconn status */
> +#define PD_CTRL_RESP_ROLE_DR_POWER (1 << 3) /* Partner is dualrole power */
> +#define PD_CTRL_RESP_ROLE_DR_DATA (1 << 4) /* Partner is dualrole data */
> +#define PD_CTRL_RESP_ROLE_USB_COMM (1 << 5) /* Partner USB comm capable */
> +#define PD_CTRL_RESP_ROLE_EXT_POWERED (1 << 6) /* Partner externally powerd */
> +
> struct ec_response_usb_pd_control_v1 {
> uint8_t enabled;
> uint8_t role;
>
--
Best Regards,
Chanwoo Choi
Samsung Electronics
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