1 /*
2  * Copyright (C) 2015-2016 Socionext Inc.
3  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #ifndef __PINCTRL_UNIPHIER_H__
9 #define __PINCTRL_UNIPHIER_H__
10 
11 #include <linux/bitops.h>
12 #include <linux/bug.h>
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 
16 #define UNIPHIER_PINCTRL_PINMUX_BASE	0x1000
17 #define UNIPHIER_PINCTRL_LOAD_PINMUX	0x1700
18 #define UNIPHIER_PINCTRL_IECTRL		0x1d00
19 
20 #define UNIPHIER_PIN_ATTR_PACKED(iectrl)	(iectrl)
21 
22 static inline unsigned int uniphier_pin_get_iectrl(unsigned long data)
23 {
24 	return data;
25 }
26 
27 /**
28  * struct uniphier_pinctrl_pin - pin data for UniPhier SoC
29  *
30  * @number: pin number
31  * @data: additional per-pin data
32  */
33 struct uniphier_pinctrl_pin {
34 	unsigned number;
35 	unsigned long data;
36 };
37 
38 /**
39  * struct uniphier_pinctrl_group - pin group data for UniPhier SoC
40  *
41  * @name: pin group name
42  * @pins: array of pins that belong to the group
43  * @num_pins: number of pins in the group
44  * @muxvals: array of values to be set to pinmux registers
45  */
46 struct uniphier_pinctrl_group {
47 	const char *name;
48 	const unsigned *pins;
49 	unsigned num_pins;
50 	const int *muxvals;
51 };
52 
53 /**
54  * struct uniphier_pinctrl_socdata - SoC data for UniPhier pin controller
55  *
56  * @pins: array of pin data
57  * @pins_count: number of pin data
58  * @groups: array of pin group data
59  * @groups_count: number of pin group data
60  * @functions: array of pinmux function names
61  * @functions_count: number of pinmux functions
62  * @mux_bits: bit width of each pinmux register
63  * @reg_stride: stride of pinmux register address
64  * @caps: SoC-specific capability flag
65  */
66 struct uniphier_pinctrl_socdata {
67 	const struct uniphier_pinctrl_pin *pins;
68 	int pins_count;
69 	const struct uniphier_pinctrl_group *groups;
70 	int groups_count;
71 	const char * const *functions;
72 	int functions_count;
73 	unsigned caps;
74 #define UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL	BIT(1)
75 #define UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE	BIT(0)
76 };
77 
78 #define UNIPHIER_PINCTRL_PIN(a, b)					\
79 {									\
80 	.number = a,							\
81 	.data = UNIPHIER_PIN_ATTR_PACKED(b),				\
82 }
83 
84 #define __UNIPHIER_PINCTRL_GROUP(grp)					\
85 	{								\
86 		.name = #grp,						\
87 		.pins = grp##_pins,					\
88 		.num_pins = ARRAY_SIZE(grp##_pins),			\
89 		.muxvals = grp##_muxvals +				\
90 			BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) !=	\
91 					  ARRAY_SIZE(grp##_muxvals)),	\
92 	}
93 
94 #define __UNIPHIER_PINMUX_FUNCTION(func)	#func
95 
96 #ifdef CONFIG_SPL_BUILD
97 #define UNIPHIER_PINCTRL_GROUP(grp)		{ .name = NULL }
98 #define UNIPHIER_PINMUX_FUNCTION(func)		NULL
99 #else
100 #define UNIPHIER_PINCTRL_GROUP(grp)		__UNIPHIER_PINCTRL_GROUP(grp)
101 #define UNIPHIER_PINMUX_FUNCTION(func)		__UNIPHIER_PINMUX_FUNCTION(func)
102 #endif
103 
104 #define UNIPHIER_PINCTRL_GROUP_SPL(grp)		__UNIPHIER_PINCTRL_GROUP(grp)
105 #define UNIPHIER_PINMUX_FUNCTION_SPL(func)	__UNIPHIER_PINMUX_FUNCTION(func)
106 
107 /**
108  * struct uniphier_pinctrl_priv - private data for UniPhier pinctrl driver
109  *
110  * @base: base address of the pinctrl device
111  * @socdata: SoC specific data
112  */
113 struct uniphier_pinctrl_priv {
114 	void __iomem *base;
115 	struct uniphier_pinctrl_socdata *socdata;
116 };
117 
118 extern const struct pinctrl_ops uniphier_pinctrl_ops;
119 
120 int uniphier_pinctrl_probe(struct udevice *dev,
121 			   struct uniphier_pinctrl_socdata *socdata);
122 
123 #endif /* __PINCTRL_UNIPHIER_H__ */
124