static int cdns3_idle_init(struct cdns3 *cdns);
-static inline
-struct cdns3_role_driver *cdns3_get_current_role_driver(struct cdns3 *cdns)
-{
- WARN_ON(!cdns->roles[cdns->role]);
- return cdns->roles[cdns->role];
-}
-
static int cdns3_role_start(struct cdns3 *cdns, enum usb_role role)
{
int ret;
cdns3_drd_exit(cdns);
}
-static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns);
-
/**
* cdns3_core_init_role - initialize role of operation
* @cdns: Pointer to cdns3 structure
struct device *dev = cdns->dev;
enum usb_dr_mode best_dr_mode;
enum usb_dr_mode dr_mode;
- int ret = 0;
+ int ret;
dr_mode = usb_get_dr_mode(dev);
cdns->role = USB_ROLE_NONE;
goto err;
}
- return ret;
+ return 0;
err:
cdns3_exit_roles(cdns);
return ret;
}
/**
- * cdsn3_hw_role_state_machine - role switch state machine based on hw events.
+ * cdns3_hw_role_state_machine - role switch state machine based on hw events.
* @cdns: Pointer to controller structure.
*
* Returns next role to be entered based on hw events.
*/
-static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns)
+static enum usb_role cdns3_hw_role_state_machine(struct cdns3 *cdns)
{
- enum usb_role role;
+ enum usb_role role = USB_ROLE_NONE;
int id, vbus;
- if (cdns->dr_mode != USB_DR_MODE_OTG)
- goto not_otg;
+ if (cdns->dr_mode != USB_DR_MODE_OTG) {
+ if (cdns3_is_host(cdns))
+ role = USB_ROLE_HOST;
+ if (cdns3_is_device(cdns))
+ role = USB_ROLE_DEVICE;
+
+ return role;
+ }
id = cdns3_get_id(cdns);
vbus = cdns3_get_vbus(cdns);
dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);
return role;
-
-not_otg:
- if (cdns3_is_host(cdns))
- role = USB_ROLE_HOST;
- if (cdns3_is_device(cdns))
- role = USB_ROLE_DEVICE;
-
- return role;
}
static int cdns3_idle_role_start(struct cdns3 *cdns)
/**
* cdns3_hw_role_switch - switch roles based on HW state
- * @cdns3: controller
+ * @cdns: controller
*/
int cdns3_hw_role_switch(struct cdns3 *cdns)
{
enum usb_role real_role, current_role;
int ret = 0;
- /* Do nothing if role based on syfs. */
- if (cdns->role_override)
- return 0;
-
pm_runtime_get_sync(cdns->dev);
current_role = cdns->role;
- real_role = cdsn3_hw_role_state_machine(cdns);
+ real_role = cdns3_hw_role_state_machine(cdns);
/* Do nothing if nothing changed */
if (current_role == real_role)
/**
* cdsn3_role_get - get current role of controller.
*
- * @dev: Pointer to device structure
+ * @sw: pointer to USB role switch structure
*
* Returns role
*/
/**
* cdns3_role_set - set current role of controller.
*
- * @dev: pointer to device object
- * @role - the previous role
+ * @sw: pointer to USB role switch structure
+ * @role: the previous role
* Handles below events:
* - Role switch for dual-role devices
* - USB_ROLE_GADGET <--> USB_ROLE_NONE for peripheral-only devices
pm_runtime_get_sync(cdns->dev);
- /*
- * FIXME: switch role framework should be extended to meet
- * requirements. Driver assumes that role can be controlled
- * by SW or HW. Temporary workaround is to use USB_ROLE_NONE to
- * switch from SW to HW control.
- *
- * For dr_mode == USB_DR_MODE_OTG:
- * if user sets USB_ROLE_HOST or USB_ROLE_DEVICE then driver
- * sets role_override flag and forces that role.
- * if user sets USB_ROLE_NONE, driver clears role_override and lets
- * HW state machine take over.
- *
- * For dr_mode != USB_DR_MODE_OTG:
- * Assumptions:
- * 1. Restricted user control between NONE and dr_mode.
- * 2. Driver doesn't need to rely on role_override flag.
- * 3. Driver needs to ensure that HW state machine is never called
- * if dr_mode != USB_DR_MODE_OTG.
- */
- if (role == USB_ROLE_NONE)
- cdns->role_override = 0;
- else
- cdns->role_override = 1;
-
- /*
- * HW state might have changed so driver need to trigger
- * HW state machine if dr_mode == USB_DR_MODE_OTG.
- */
- if (!cdns->role_override && cdns->dr_mode == USB_DR_MODE_OTG) {
- cdns3_hw_role_switch(cdns);
- goto pm_put;
- }
-
if (cdns->role == role)
goto pm_put;
case USB_ROLE_HOST:
break;
default:
- ret = -EPERM;
goto pm_put;
}
}
case USB_ROLE_DEVICE:
break;
default:
- ret = -EPERM;
goto pm_put;
}
}
cdns3_role_stop(cdns);
ret = cdns3_role_start(cdns, role);
- if (ret) {
+ if (ret)
dev_err(cdns->dev, "set role %d has failed\n", role);
- ret = -EPERM;
- }
pm_put:
pm_runtime_put_sync(cdns->dev);
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret) {
dev_err(dev, "error setting dma mask: %d\n", ret);
- return -ENODEV;
+ return ret;
}
cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
if (cdns->dev_irq < 0)
dev_err(dev, "couldn't get peripheral irq\n");
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dev");
- regs = devm_ioremap_resource(dev, res);
+ regs = devm_platform_ioremap_resource_byname(pdev, "dev");
if (IS_ERR(regs))
return PTR_ERR(regs);
cdns->dev_regs = regs;
sw_desc.get = cdns3_role_get;
sw_desc.allow_userspace_control = true;
sw_desc.driver_data = cdns;
+ if (device_property_read_bool(dev, "usb-role-switch"))
+ sw_desc.fwnode = dev->fwnode;
cdns->role_sw = usb_role_switch_register(dev, &sw_desc);
if (IS_ERR(cdns->role_sw)) {
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