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deda8287 VK |
1 | /* |
2 | * Driver header file for the ST Microelectronics SPEAr pinmux | |
3 | * | |
4 | * Copyright (C) 2012 ST Microelectronics | |
5 | * Viresh Kumar <viresh.kumar@st.com> | |
6 | * | |
7 | * This file is licensed under the terms of the GNU General Public | |
8 | * License version 2. This program is licensed "as is" without any | |
9 | * warranty of any kind, whether express or implied. | |
10 | */ | |
11 | ||
12 | #ifndef __PINMUX_SPEAR_H__ | |
13 | #define __PINMUX_SPEAR_H__ | |
14 | ||
15 | #include <linux/pinctrl/pinctrl.h> | |
16 | #include <linux/types.h> | |
17 | ||
18 | struct platform_device; | |
19 | struct device; | |
20 | ||
21 | /** | |
22 | * struct spear_pmx_mode - SPEAr pmx mode | |
23 | * @name: name of pmx mode | |
24 | * @mode: mode id | |
25 | * @reg: register for configuring this mode | |
26 | * @mask: mask of this mode in reg | |
27 | * @val: val to be configured at reg after doing (val & mask) | |
28 | */ | |
29 | struct spear_pmx_mode { | |
30 | const char *const name; | |
31 | u16 mode; | |
32 | u16 reg; | |
33 | u16 mask; | |
34 | u32 val; | |
35 | }; | |
36 | ||
37 | /** | |
38 | * struct spear_muxreg - SPEAr mux reg configuration | |
39 | * @reg: register offset | |
40 | * @mask: mask bits | |
41 | * @val: val to be written on mask bits | |
42 | */ | |
43 | struct spear_muxreg { | |
44 | u16 reg; | |
45 | u32 mask; | |
46 | u32 val; | |
47 | }; | |
48 | ||
49 | /** | |
50 | * struct spear_modemux - SPEAr mode mux configuration | |
51 | * @modes: mode ids supported by this group of muxregs | |
52 | * @nmuxregs: number of muxreg configurations to be done for modes | |
53 | * @muxregs: array of muxreg configurations to be done for modes | |
54 | */ | |
55 | struct spear_modemux { | |
56 | u16 modes; | |
57 | u8 nmuxregs; | |
58 | struct spear_muxreg *muxregs; | |
59 | }; | |
60 | ||
61 | /** | |
62 | * struct spear_pingroup - SPEAr pin group configurations | |
63 | * @name: name of pin group | |
64 | * @pins: array containing pin numbers | |
65 | * @npins: size of pins array | |
66 | * @modemuxs: array of modemux configurations for this pin group | |
67 | * @nmodemuxs: size of array modemuxs | |
68 | * | |
69 | * A representation of a group of pins in the SPEAr pin controller. Each group | |
70 | * allows some parameter or parameters to be configured. | |
71 | */ | |
72 | struct spear_pingroup { | |
73 | const char *name; | |
74 | const unsigned *pins; | |
75 | unsigned npins; | |
76 | struct spear_modemux *modemuxs; | |
77 | unsigned nmodemuxs; | |
78 | }; | |
79 | ||
80 | /** | |
81 | * struct spear_function - SPEAr pinctrl mux function | |
82 | * @name: The name of the function, exported to pinctrl core. | |
83 | * @groups: An array of pin groups that may select this function. | |
84 | * @ngroups: The number of entries in @groups. | |
85 | */ | |
86 | struct spear_function { | |
87 | const char *name; | |
88 | const char *const *groups; | |
89 | unsigned ngroups; | |
90 | }; | |
91 | ||
92 | /** | |
93 | * struct spear_pinctrl_machdata - SPEAr pin controller machine driver | |
94 | * configuration | |
95 | * @pins: An array describing all pins the pin controller affects. | |
96 | * All pins which are also GPIOs must be listed first within the *array, | |
97 | * and be numbered identically to the GPIO controller's *numbering. | |
98 | * @npins: The numbmer of entries in @pins. | |
99 | * @functions: An array describing all mux functions the SoC supports. | |
100 | * @nfunctions: The numbmer of entries in @functions. | |
101 | * @groups: An array describing all pin groups the pin SoC supports. | |
102 | * @ngroups: The numbmer of entries in @groups. | |
103 | * | |
104 | * @modes_supported: Does SoC support modes | |
105 | * @mode: mode configured from probe | |
106 | * @pmx_modes: array of modes supported by SoC | |
107 | * @npmx_modes: number of entries in pmx_modes. | |
108 | */ | |
109 | struct spear_pinctrl_machdata { | |
110 | const struct pinctrl_pin_desc *pins; | |
111 | unsigned npins; | |
112 | struct spear_function **functions; | |
113 | unsigned nfunctions; | |
114 | struct spear_pingroup **groups; | |
115 | unsigned ngroups; | |
116 | ||
117 | bool modes_supported; | |
118 | u16 mode; | |
119 | struct spear_pmx_mode **pmx_modes; | |
120 | unsigned npmx_modes; | |
121 | }; | |
122 | ||
123 | /** | |
124 | * struct spear_pmx - SPEAr pinctrl mux | |
125 | * @dev: pointer to struct dev of platform_device registered | |
126 | * @pctl: pointer to struct pinctrl_dev | |
127 | * @machdata: pointer to SoC or machine specific structure | |
128 | * @vbase: virtual base address of pinmux controller | |
129 | */ | |
130 | struct spear_pmx { | |
131 | struct device *dev; | |
132 | struct pinctrl_dev *pctl; | |
133 | struct spear_pinctrl_machdata *machdata; | |
134 | void __iomem *vbase; | |
135 | }; | |
136 | ||
137 | /* exported routines */ | |
138 | void __devinit pmx_init_addr(struct spear_pinctrl_machdata *machdata, u16 reg); | |
139 | int __devinit spear_pinctrl_probe(struct platform_device *pdev, | |
140 | struct spear_pinctrl_machdata *machdata); | |
141 | int __devexit spear_pinctrl_remove(struct platform_device *pdev); | |
142 | #endif /* __PINMUX_SPEAR_H__ */ |