1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* Marvell MVEBU pinctrl driver
*
* Authors: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __PINCTRL_MVEBU_H__
#define __PINCTRL_MVEBU_H__
/**
* struct mvebu_mpp_ctrl - describe a mpp control
* @name: name of the control group
* @pid: first pin id handled by this control
* @npins: number of pins controlled by this control
* @mpp_get: (optional) special function to get mpp setting
* @mpp_set: (optional) special function to set mpp setting
* @mpp_gpio_req: (optional) special function to request gpio
* @mpp_gpio_dir: (optional) special function to set gpio direction
*
* A mpp_ctrl describes a muxable unit, e.g. pin, group of pins, or
* internal function, inside the SoC. Each muxable unit can be switched
* between two or more different settings, e.g. assign mpp pin 13 to
* uart1 or sata.
*
* The mpp_get/_set functions are mandatory and are used to get/set a
* specific mode. The optional mpp_gpio_req/_dir functions can be used
* to allow pin settings with varying gpio pins.
*/
struct mvebu_mpp_ctrl {
const char *name;
u8 pid;
u8 npins;
unsigned *pins;
int (*mpp_get)(unsigned pid, unsigned long *config);
int (*mpp_set)(unsigned pid, unsigned long config);
int (*mpp_gpio_req)(unsigned pid);
int (*mpp_gpio_dir)(unsigned pid, bool input);
};
/**
* struct mvebu_mpp_ctrl_setting - describe a mpp ctrl setting
* @val: ctrl setting value
* @name: ctrl setting name, e.g. uart2, spi0 - unique per mpp_mode
* @subname: (optional) additional ctrl setting name, e.g. rts, cts
* @variant: (optional) variant identifier mask
* @flags: (private) flags to store gpi/gpo/gpio capabilities
*
* A ctrl_setting describes a specific internal mux function that a mpp pin
* can be switched to. The value (val) will be written in the corresponding
* register for common mpp pin configuration registers on MVEBU. SoC specific
* mpp_get/_set function may use val to distinguish between different settings.
*
* The name will be used to switch to this setting in DT description, e.g.
* marvell,function = "uart2". subname is only for debugging purposes.
*
* If name is one of "gpi", "gpo", "gpio" gpio capabilities are
* parsed during initialization and stored in flags.
*
* The variant can be used to combine different revisions of one SoC to a
* common pinctrl driver. It is matched (AND) with variant of soc_info to
* determine if a setting is available on the current SoC revision.
*/
struct mvebu_mpp_ctrl_setting {
u8 val;
const char *name;
const char *subname;
u8 variant;
u8 flags;
#define MVEBU_SETTING_GPO (1 << 0)
#define MVEBU_SETTING_GPI (1 << 1)
};
/**
* struct mvebu_mpp_mode - link ctrl and settings
* @pid: first pin id handled by this mode
* @settings: list of settings available for this mode
*
* A mode connects all available settings with the corresponding mpp_ctrl
* given by pid.
*/
struct mvebu_mpp_mode {
u8 pid;
struct mvebu_mpp_ctrl_setting *settings;
};
/**
* struct mvebu_pinctrl_soc_info - SoC specific info passed to pinctrl-mvebu
* @variant: variant mask of soc_info
* @controls: list of available mvebu_mpp_ctrls
* @ncontrols: number of available mvebu_mpp_ctrls
* @modes: list of available mvebu_mpp_modes
* @nmodes: number of available mvebu_mpp_modes
* @gpioranges: list of pinctrl_gpio_ranges
* @ngpioranges: number of available pinctrl_gpio_ranges
*
* This struct describes all pinctrl related information for a specific SoC.
* If variant is unequal 0 it will be matched (AND) with variant of each
* setting and allows to distinguish between different revisions of one SoC.
*/
struct mvebu_pinctrl_soc_info {
u8 variant;
struct mvebu_mpp_ctrl *controls;
int ncontrols;
struct mvebu_mpp_mode *modes;
int nmodes;
struct pinctrl_gpio_range *gpioranges;
int ngpioranges;
};
#define MPP_FUNC_CTRL(_idl, _idh, _name, _func) \
{ \
.name = _name, \
.pid = _idl, \
.npins = _idh - _idl + 1, \
.pins = (unsigned[_idh - _idl + 1]) { }, \
.mpp_get = _func ## _get, \
.mpp_set = _func ## _set, \
.mpp_gpio_req = NULL, \
.mpp_gpio_dir = NULL, \
}
#define MPP_FUNC_GPIO_CTRL(_idl, _idh, _name, _func) \
{ \
.name = _name, \
.pid = _idl, \
.npins = _idh - _idl + 1, \
.pins = (unsigned[_idh - _idl + 1]) { }, \
.mpp_get = _func ## _get, \
.mpp_set = _func ## _set, \
.mpp_gpio_req = _func ## _gpio_req, \
.mpp_gpio_dir = _func ## _gpio_dir, \
}
#define _MPP_VAR_FUNCTION(_val, _name, _subname, _mask) \
{ \
.val = _val, \
.name = _name, \
.subname = _subname, \
.variant = _mask, \
.flags = 0, \
}
#if defined(CONFIG_DEBUG_FS)
#define MPP_VAR_FUNCTION(_val, _name, _subname, _mask) \
_MPP_VAR_FUNCTION(_val, _name, _subname, _mask)
#else
#define MPP_VAR_FUNCTION(_val, _name, _subname, _mask) \
_MPP_VAR_FUNCTION(_val, _name, NULL, _mask)
#endif
#define MPP_FUNCTION(_val, _name, _subname) \
MPP_VAR_FUNCTION(_val, _name, _subname, (u8)-1)
#define MPP_MODE(_id, ...) \
{ \
.pid = _id, \
.settings = (struct mvebu_mpp_ctrl_setting[]){ \
__VA_ARGS__, { } }, \
}
#define MPP_GPIO_RANGE(_id, _pinbase, _gpiobase, _npins) \
{ \
.name = "mvebu-gpio", \
.id = _id, \
.pin_base = _pinbase, \
.base = _gpiobase, \
.npins = _npins, \
}
#define MVEBU_MPPS_PER_REG 8
#define MVEBU_MPP_BITS 4
#define MVEBU_MPP_MASK 0xf
static inline int default_mpp_ctrl_get(void __iomem *base, unsigned int pid,
unsigned long *config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
*config = (readl(base + off) >> shift) & MVEBU_MPP_MASK;
return 0;
}
static inline int default_mpp_ctrl_set(void __iomem *base, unsigned int pid,
unsigned long config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned long reg;
reg = readl(base + off) & ~(MVEBU_MPP_MASK << shift);
writel(reg | (config << shift), base + off);
return 0;
}
int mvebu_pinctrl_probe(struct platform_device *pdev);
#endif
|
