core.h
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/**
* core.h - Cadence USB3 DRD Controller Core header file
*
* Copyright 2017 NXP
*
* Authors: Peter Chen <peter.chen@nxp.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 of
* the License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DRIVERS_USB_CDNS3_CORE_H
#define __DRIVERS_USB_CDNS3_CORE_H
struct cdns3;
enum cdns3_roles {
CDNS3_ROLE_HOST = 0,
CDNS3_ROLE_GADGET,
CDNS3_ROLE_END,
};
/**
* struct cdns3_role_driver - host/gadget role driver
* @start: start this role
* @stop: stop this role
* @suspend: suspend callback for this role
* @resume: resume callback for this role
* @irq: irq handler for this role
* @name: role name string (host/gadget)
*/
struct cdns3_role_driver {
int (*start)(struct cdns3 *);
void (*stop)(struct cdns3 *);
int (*suspend)(struct cdns3 *, bool do_wakeup);
int (*resume)(struct cdns3 *, bool hibernated);
irqreturn_t (*irq)(struct cdns3 *);
const char *name;
};
#define CDNS3_NUM_OF_CLKS 5
/**
* struct cdns3 - Representation of Cadence USB3 DRD controller.
* @dev: pointer to Cadence device struct
* @xhci_regs: pointer to base of xhci registers
* @xhci_res: the resource for xhci
* @dev_regs: pointer to base of dev registers
* @none_core_regs: pointer to base of nxp wrapper registers
* @phy_regs: pointer to base of phy registers
* @otg_regs: pointer to base of otg registers
* @irq: irq number for controller
* @roles: array of supported roles for this controller
* @role: current role
* @host_dev: the child host device pointer for cdns3 core
* @gadget_dev: the child gadget device pointer for cdns3 core
* @usbphy: usbphy for this controller
* @cdns3_clks: Clock pointer array for cdns3 core
* @extcon: Type-C extern connector
* @extcon_nb: notifier block for Type-C extern connector
* @role_switch_wq: work queue item for role switch
* @in_lpm: the controller in low power mode
* @wakeup_int: the wakeup interrupt
* @mutex: the mutex for concurrent code at driver
*/
struct cdns3 {
struct device *dev;
void __iomem *xhci_regs;
struct resource *xhci_res;
struct usbss_dev_register_block_type __iomem *dev_regs;
void __iomem *none_core_regs;
void __iomem *phy_regs;
void __iomem *otg_regs;
int irq;
struct cdns3_role_driver *roles[CDNS3_ROLE_END];
enum cdns3_roles role;
struct device *host_dev;
struct device *gadget_dev;
struct usb_phy *usbphy;
struct clk *cdns3_clks[CDNS3_NUM_OF_CLKS];
struct extcon_dev *extcon;
struct notifier_block extcon_nb;
struct work_struct role_switch_wq;
bool in_lpm;
bool wakeup_int;
struct mutex mutex;
};
static inline struct cdns3_role_driver *cdns3_role(struct cdns3 *cdns)
{
WARN_ON(cdns->role >= CDNS3_ROLE_END || !cdns->roles[cdns->role]);
return cdns->roles[cdns->role];
}
static inline int cdns3_role_start(struct cdns3 *cdns, enum cdns3_roles role)
{
int ret;
if (role >= CDNS3_ROLE_END)
return 0;
if (!cdns->roles[role])
return -ENXIO;
mutex_lock(&cdns->mutex);
cdns->role = role;
ret = cdns->roles[role]->start(cdns);
mutex_unlock(&cdns->mutex);
return ret;
}
static inline void cdns3_role_stop(struct cdns3 *cdns)
{
enum cdns3_roles role = cdns->role;
if (role == CDNS3_ROLE_END)
return;
mutex_lock(&cdns->mutex);
cdns->roles[role]->stop(cdns);
cdns->role = CDNS3_ROLE_END;
mutex_unlock(&cdns->mutex);
}
#endif /* __DRIVERS_USB_CDNS3_CORE_H */