1 /* SPDX-License-Identifier: GPL-1.0+ */
2 /*
3  * Renesas USB driver
4  *
5  * Copyright (C) 2011 Renesas Solutions Corp.
6  * Copyright (C) 2019 Renesas Electronics Corporation
7  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
8  */
9 #ifndef RENESAS_USB_MOD_H
10 #define RENESAS_USB_MOD_H
11 
12 #include <linux/spinlock.h>
13 #include <linux/usb/renesas_usbhs.h>
14 #include "common.h"
15 
16 /*
17  *	struct
18  */
19 struct usbhs_irq_state {
20 	u16 intsts0;
21 	u16 intsts1;
22 	u16 brdysts;
23 	u16 nrdysts;
24 	u16 bempsts;
25 };
26 
27 struct usbhs_mod {
28 	char *name;
29 
30 	/*
31 	 * entry point from common.c
32 	 */
33 	int (*start)(struct usbhs_priv *priv);
34 	int (*stop)(struct usbhs_priv *priv);
35 
36 	/*
37 	 * INTSTS0
38 	 */
39 
40 	/* DVST (DVSQ) */
41 	int (*irq_dev_state)(struct usbhs_priv *priv,
42 			     struct usbhs_irq_state *irq_state);
43 
44 	/* CTRT (CTSQ) */
45 	int (*irq_ctrl_stage)(struct usbhs_priv *priv,
46 			      struct usbhs_irq_state *irq_state);
47 
48 	/* BEMP / BEMPSTS */
49 	int (*irq_empty)(struct usbhs_priv *priv,
50 			 struct usbhs_irq_state *irq_state);
51 	u16 irq_bempsts;
52 
53 	/* BRDY / BRDYSTS */
54 	int (*irq_ready)(struct usbhs_priv *priv,
55 			 struct usbhs_irq_state *irq_state);
56 	u16 irq_brdysts;
57 
58 	/*
59 	 * INTSTS1
60 	 */
61 
62 	/* ATTCHE */
63 	int (*irq_attch)(struct usbhs_priv *priv,
64 			 struct usbhs_irq_state *irq_state);
65 
66 	/* DTCHE */
67 	int (*irq_dtch)(struct usbhs_priv *priv,
68 			struct usbhs_irq_state *irq_state);
69 
70 	/* SIGN */
71 	int (*irq_sign)(struct usbhs_priv *priv,
72 			struct usbhs_irq_state *irq_state);
73 
74 	/* SACK */
75 	int (*irq_sack)(struct usbhs_priv *priv,
76 			struct usbhs_irq_state *irq_state);
77 
78 	struct usbhs_priv *priv;
79 };
80 
81 struct usbhs_mod_info {
82 	struct usbhs_mod *mod[USBHS_MAX];
83 	struct usbhs_mod *curt; /* current mod */
84 
85 	/*
86 	 * INTSTS0 :: VBINT
87 	 *
88 	 * This function will be used as autonomy mode (runtime_pwctrl == 0)
89 	 * when the platform doesn't have own get_vbus function.
90 	 *
91 	 * This callback cannot be member of "struct usbhs_mod" because it
92 	 * will be used even though host/gadget has not been selected.
93 	 */
94 	int (*irq_vbus)(struct usbhs_priv *priv,
95 			struct usbhs_irq_state *irq_state);
96 
97 	/*
98 	 * This function will be used on any gadget mode. To simplify the code,
99 	 * this member is in here.
100 	 */
101 	int (*get_vbus)(struct platform_device *pdev);
102 };
103 
104 /*
105  *		for host/gadget module
106  */
107 struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id);
108 struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv);
109 void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *usb, int id);
110 int usbhs_mod_is_host(struct usbhs_priv *priv);
111 int usbhs_mod_change(struct usbhs_priv *priv, int id);
112 int usbhs_mod_probe(struct usbhs_priv *priv);
113 void usbhs_mod_remove(struct usbhs_priv *priv);
114 
115 void usbhs_mod_autonomy_mode(struct usbhs_priv *priv);
116 void usbhs_mod_non_autonomy_mode(struct usbhs_priv *priv);
117 
118 /*
119  *		status functions
120  */
121 int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state);
122 int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state);
123 
124 /*
125  *		callback functions
126  */
127 void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod);
128 
129 
130 #define usbhs_mod_call(priv, func, param...)		\
131 	({						\
132 		struct usbhs_mod *mod;			\
133 		mod = usbhs_mod_get_current(priv);	\
134 		!mod		? -ENODEV :		\
135 		!mod->func	? 0 :			\
136 		 mod->func(param);			\
137 	})
138 
139 #define usbhs_priv_to_modinfo(priv) (&priv->mod_info)
140 #define usbhs_mod_info_call(priv, func, param...)	\
141 ({							\
142 	struct usbhs_mod_info *info;			\
143 	info = usbhs_priv_to_modinfo(priv);		\
144 	!info->func ? 0 :				\
145 	 info->func(param);				\
146 })
147 
148 /*
149  * host / gadget control
150  */
151 #if	defined(CONFIG_USB_RENESAS_USBHS_HCD) || \
152 	defined(CONFIG_USB_RENESAS_USBHS_HCD_MODULE)
153 extern int usbhs_mod_host_probe(struct usbhs_priv *priv);
154 extern int usbhs_mod_host_remove(struct usbhs_priv *priv);
155 #else
usbhs_mod_host_probe(struct usbhs_priv * priv)156 static inline int usbhs_mod_host_probe(struct usbhs_priv *priv)
157 {
158 	return 0;
159 }
usbhs_mod_host_remove(struct usbhs_priv * priv)160 static inline void usbhs_mod_host_remove(struct usbhs_priv *priv)
161 {
162 }
163 #endif
164 
165 #if	defined(CONFIG_USB_RENESAS_USBHS_UDC) || \
166 	defined(CONFIG_USB_RENESAS_USBHS_UDC_MODULE)
167 extern int usbhs_mod_gadget_probe(struct usbhs_priv *priv);
168 extern void usbhs_mod_gadget_remove(struct usbhs_priv *priv);
169 #else
usbhs_mod_gadget_probe(struct usbhs_priv * priv)170 static inline int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
171 {
172 	return 0;
173 }
usbhs_mod_gadget_remove(struct usbhs_priv * priv)174 static inline void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
175 {
176 }
177 #endif
178 
179 #endif /* RENESAS_USB_MOD_H */
180