[Patch V2 09/18] usb: gadget: tegra-xudc: Remove usb-role-switch support

Nagarjuna Kristam
2019-12-18T09:17:31Z

Padctl driver will act as a central driver to receive USB role changes via
usb-role-switch. This is updated to corresponding host, device drivers.
Hence remove usb-role-switch from XUDC driver.

Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
---
V2:
- No changes in this version
---
drivers/usb/gadget/udc/tegra-xudc.c | 65 ++++++++++---------------------------
1 file changed, 17 insertions(+), 48 deletions(-)

diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c
index 634c2c1..6ddb974 100644
--- a/drivers/usb/gadget/udc/tegra-xudc.c
+++ b/drivers/usb/gadget/udc/tegra-xudc.c
@@ -477,8 +477,8 @@ struct tegra_xudc {

struct clk_bulk_data *clks;

- enum usb_role device_mode;
- struct usb_role_switch *usb_role_sw;
+ enum usb_role role;
+ bool device_mode;
struct work_struct usb_role_sw_work;

struct phy *usb3_phy;
@@ -596,6 +596,8 @@ static void tegra_xudc_device_mode_on(struct tegra_xudc *xudc)
{
int err;

+ if (xudc->device_mode)
+ return;
pm_runtime_get_sync(xudc->dev);

err = phy_power_on(xudc->utmi_phy);
@@ -610,7 +612,8 @@ static void tegra_xudc_device_mode_on(struct tegra_xudc *xudc)

tegra_xusb_padctl_set_vbus_override(xudc->padctl, true);

- xudc->device_mode = USB_ROLE_DEVICE;
+ xudc->device_mode = true;
+
}

static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc)
@@ -619,6 +622,9 @@ static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc)
u32 pls, val;
int err;

+ if (!xudc->device_mode)
+ return;
+
dev_dbg(xudc->dev, "device mode off\n");

connected = !!(xudc_readl(xudc, PORTSC) & PORTSC_CCS);
@@ -643,7 +649,7 @@ static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc)
xudc_writel(xudc, val, PORTSC);
}

- xudc->device_mode = USB_ROLE_NONE;
+ xudc->device_mode = false;

/* Wait for disconnect event. */
if (connected)
@@ -668,31 +674,13 @@ static void tegra_xudc_usb_role_sw_work(struct work_struct *work)
struct tegra_xudc *xudc = container_of(work, struct tegra_xudc,
usb_role_sw_work);

- if (!xudc->usb_role_sw ||
- usb_role_switch_get_role(xudc->usb_role_sw) == USB_ROLE_DEVICE)
+ if (xudc->role == USB_ROLE_DEVICE)
tegra_xudc_device_mode_on(xudc);
else
tegra_xudc_device_mode_off(xudc);

}

-static int tegra_xudc_usb_role_sw_set(struct device *dev, enum usb_role role)
-{
- struct tegra_xudc *xudc = dev_get_drvdata(dev);
- unsigned long flags;
-
- dev_dbg(dev, "%s role is %d\n", __func__, role);
-
- spin_lock_irqsave(&xudc->lock, flags);
-
- if (!xudc->suspended)
- schedule_work(&xudc->usb_role_sw_work);
-
- spin_unlock_irqrestore(&xudc->lock, flags);
-
- return 0;
-}
-
static void tegra_xudc_plc_reset_work(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
@@ -729,8 +717,7 @@ static void tegra_xudc_port_reset_war_work(struct work_struct *work)

spin_lock_irqsave(&xudc->lock, flags);

- if ((xudc->device_mode == USB_ROLE_DEVICE)
- && xudc->wait_for_sec_prc) {
+ if (xudc->device_mode && xudc->wait_for_sec_prc) {
pls = (xudc_readl(xudc, PORTSC) & PORTSC_PLS_MASK) >>
PORTSC_PLS_SHIFT;
dev_dbg(xudc->dev, "pls = %x\n", pls);
@@ -3457,7 +3444,6 @@ static int tegra_xudc_probe(struct platform_device *pdev)
{
struct tegra_xudc *xudc;
struct resource *res;
- struct usb_role_switch_desc role_sx_desc = { 0 };
unsigned int i;
int err;

@@ -3587,23 +3573,10 @@ static int tegra_xudc_probe(struct platform_device *pdev)
INIT_DELAYED_WORK(&xudc->port_reset_war_work,
tegra_xudc_port_reset_war_work);

- if (of_property_read_bool(xudc->dev->of_node, "usb-role-switch")) {
- role_sx_desc.set = tegra_xudc_usb_role_sw_set;
- role_sx_desc.fwnode = dev_fwnode(xudc->dev);
-
- xudc->usb_role_sw = usb_role_switch_register(xudc->dev,
- &role_sx_desc);
- if (IS_ERR(xudc->usb_role_sw)) {
- err = PTR_ERR(xudc->usb_role_sw);
- dev_err(xudc->dev, "Failed to register USB role SW: %d",
- err);
- goto free_eps;
- }
- } else {
- /* Set the mode as device mode and this keeps phy always ON */
- dev_info(xudc->dev, "Set usb role to device mode always");
- schedule_work(&xudc->usb_role_sw_work);
- }
+ /* Set the mode as device mode and this keeps phy always ON */
+ dev_info(xudc->dev, "Set usb role to device mode always");
+ xudc->role = USB_ROLE_DEVICE;
+ schedule_work(&xudc->usb_role_sw_work);

pm_runtime_enable(&pdev->dev);

@@ -3643,11 +3616,7 @@ static int tegra_xudc_remove(struct platform_device *pdev)
pm_runtime_get_sync(xudc->dev);

cancel_delayed_work(&xudc->plc_reset_work);
-
- if (xudc->usb_role_sw) {
- usb_role_switch_unregister(xudc->usb_role_sw);
- cancel_work_sync(&xudc->usb_role_sw_work);
- }
+ cancel_work_sync(&xudc->usb_role_sw_work);

usb_del_gadget_udc(&xudc->gadget);

--
2.7.4