1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Cadence USBSS and USBSSP DRD Header File.
4 *
5 * Copyright (C) 2017-2018 NXP
6 * Copyright (C) 2018-2019 Cadence.
7 *
8 * Authors: Peter Chen <peter.chen@nxp.com>
9 *          Pawel Laszczak <pawell@cadence.com>
10 */
11#ifndef __LINUX_CDNS3_CORE_H
12#define __LINUX_CDNS3_CORE_H
13
14#include <linux/usb/otg.h>
15#include <linux/usb/role.h>
16
17struct cdns;
18
19/**
20 * struct cdns_role_driver - host/gadget role driver
21 * @start: start this role
22 * @stop: stop this role
23 * @suspend: suspend callback for this role
24 * @resume: resume callback for this role
25 * @irq: irq handler for this role
26 * @name: role name string (host/gadget)
27 * @state: current state
28 */
29struct cdns_role_driver {
30	int (*start)(struct cdns *cdns);
31	void (*stop)(struct cdns *cdns);
32	int (*suspend)(struct cdns *cdns, bool do_wakeup);
33	int (*resume)(struct cdns *cdns, bool hibernated);
34	const char *name;
35#define CDNS_ROLE_STATE_INACTIVE	0
36#define CDNS_ROLE_STATE_ACTIVE		1
37	int state;
38};
39
40#define CDNS_XHCI_RESOURCES_NUM	2
41
42struct cdns3_platform_data {
43	int (*platform_suspend)(struct device *dev,
44			bool suspend, bool wakeup);
45	unsigned long quirks;
46#define CDNS3_DEFAULT_PM_RUNTIME_ALLOW	BIT(0)
47};
48
49/**
50 * struct cdns - Representation of Cadence USB3 DRD controller.
51 * @dev: pointer to Cadence device struct
52 * @xhci_regs: pointer to base of xhci registers
53 * @xhci_res: the resource for xhci
54 * @dev_regs: pointer to base of dev registers
55 * @otg_res: the resource for otg
56 * @otg_v0_regs: pointer to base of v0 otg registers
57 * @otg_v1_regs: pointer to base of v1 otg registers
58 * @otg_cdnsp_regs: pointer to base of CDNSP otg registers
59 * @otg_regs: pointer to base of otg registers
60 * @otg_irq_regs: pointer to interrupt registers
61 * @otg_irq: irq number for otg controller
62 * @dev_irq: irq number for device controller
63 * @wakeup_irq: irq number for wakeup event, it is optional
64 * @roles: array of supported roles for this controller
65 * @role: current role
66 * @host_dev: the child host device pointer for cdns core
67 * @gadget_dev: the child gadget device pointer
68 * @usb2_phy: pointer to USB2 PHY
69 * @usb3_phy: pointer to USB3 PHY
70 * @mutex: the mutex for concurrent code at driver
71 * @dr_mode: supported mode of operation it can be only Host, only Device
72 *           or OTG mode that allow to switch between Device and Host mode.
73 *           This field based on firmware setting, kernel configuration
74 *           and hardware configuration.
75 * @role_sw: pointer to role switch object.
76 * @in_lpm: indicate the controller is in low power mode
77 * @wakeup_pending: wakeup interrupt pending
78 * @pdata: platform data from glue layer
79 * @lock: spinlock structure
80 * @xhci_plat_data: xhci private data structure pointer
81 * @gadget_init: pointer to gadget initialization function
82 */
83struct cdns {
84	struct device			*dev;
85	void __iomem			*xhci_regs;
86	struct resource			xhci_res[CDNS_XHCI_RESOURCES_NUM];
87	struct cdns3_usb_regs __iomem	*dev_regs;
88
89	struct resource				otg_res;
90	struct cdns3_otg_legacy_regs __iomem	*otg_v0_regs;
91	struct cdns3_otg_regs __iomem		*otg_v1_regs;
92	struct cdnsp_otg_regs __iomem		*otg_cdnsp_regs;
93	struct cdns_otg_common_regs __iomem	*otg_regs;
94	struct cdns_otg_irq_regs __iomem	*otg_irq_regs;
95#define CDNS3_CONTROLLER_V0	0
96#define CDNS3_CONTROLLER_V1	1
97#define CDNSP_CONTROLLER_V2	2
98	u32				version;
99	bool				phyrst_a_enable;
100
101	int				otg_irq;
102	int				dev_irq;
103	int				wakeup_irq;
104	struct cdns_role_driver	*roles[USB_ROLE_DEVICE + 1];
105	enum usb_role			role;
106	struct platform_device		*host_dev;
107	void				*gadget_dev;
108	struct phy			*usb2_phy;
109	struct phy			*usb3_phy;
110	/* mutext used in workqueue*/
111	struct mutex			mutex;
112	enum usb_dr_mode		dr_mode;
113	struct usb_role_switch		*role_sw;
114	bool				in_lpm;
115	bool				wakeup_pending;
116	struct cdns3_platform_data	*pdata;
117	spinlock_t			lock;
118	struct xhci_plat_priv		*xhci_plat_data;
119
120	int (*gadget_init)(struct cdns *cdns);
121};
122
123int cdns_hw_role_switch(struct cdns *cdns);
124int cdns_init(struct cdns *cdns);
125int cdns_remove(struct cdns *cdns);
126
127#ifdef CONFIG_PM_SLEEP
128int cdns_resume(struct cdns *cdns);
129int cdns_suspend(struct cdns *cdns);
130void cdns_set_active(struct cdns *cdns, u8 set_active);
131#else /* CONFIG_PM_SLEEP */
132static inline int cdns_resume(struct cdns *cdns)
133{ return 0; }
134static inline void cdns_set_active(struct cdns *cdns, u8 set_active) { }
135static inline int cdns_suspend(struct cdns *cdns)
136{ return 0; }
137#endif /* CONFIG_PM_SLEEP */
138#endif /* __LINUX_CDNS3_CORE_H */
139