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2744e8af LW |
1 | /* |
2 | * Core private header for the pin control subsystem | |
3 | * | |
4 | * Copyright (C) 2011 ST-Ericsson SA | |
5 | * Written on behalf of Linaro for ST-Ericsson | |
6 | * | |
7 | * Author: Linus Walleij <linus.walleij@linaro.org> | |
8 | * | |
9 | * License terms: GNU General Public License (GPL) version 2 | |
10 | */ | |
11 | ||
ab78029e | 12 | #include <linux/kref.h> |
57b676f9 SW |
13 | #include <linux/mutex.h> |
14 | #include <linux/radix-tree.h> | |
ae6b4d85 | 15 | #include <linux/pinctrl/pinconf.h> |
872acc32 | 16 | #include <linux/pinctrl/machine.h> |
ae6b4d85 LW |
17 | |
18 | struct pinctrl_gpio_range; | |
19 | ||
2744e8af LW |
20 | /** |
21 | * struct pinctrl_dev - pin control class device | |
22 | * @node: node to include this pin controller in the global pin controller list | |
23 | * @desc: the pin controller descriptor supplied when initializing this pin | |
24 | * controller | |
25 | * @pin_desc_tree: each pin descriptor for this pin controller is stored in | |
26 | * this radix tree | |
2744e8af LW |
27 | * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller, |
28 | * ranges are added to this list at runtime | |
2744e8af LW |
29 | * @dev: the device entry for this pin controller |
30 | * @owner: module providing the pin controller, used for refcounting | |
31 | * @driver_data: driver data for drivers registering to the pin controller | |
32 | * subsystem | |
46919ae6 | 33 | * @p: result of pinctrl_get() for this device |
840a47ba JD |
34 | * @hog_default: default state for pins hogged by this device |
35 | * @hog_sleep: sleep state for pins hogged by this device | |
42fed7ba | 36 | * @mutex: mutex taken on each pin controller specific action |
befe5bdf | 37 | * @device_root: debugfs root for this device |
2744e8af LW |
38 | */ |
39 | struct pinctrl_dev { | |
40 | struct list_head node; | |
41 | struct pinctrl_desc *desc; | |
42 | struct radix_tree_root pin_desc_tree; | |
2744e8af | 43 | struct list_head gpio_ranges; |
51cd24ee | 44 | struct device *dev; |
2744e8af LW |
45 | struct module *owner; |
46 | void *driver_data; | |
46919ae6 | 47 | struct pinctrl *p; |
840a47ba JD |
48 | struct pinctrl_state *hog_default; |
49 | struct pinctrl_state *hog_sleep; | |
42fed7ba | 50 | struct mutex mutex; |
02157160 TL |
51 | #ifdef CONFIG_DEBUG_FS |
52 | struct dentry *device_root; | |
53 | #endif | |
befe5bdf LW |
54 | }; |
55 | ||
56 | /** | |
57 | * struct pinctrl - per-device pin control state holder | |
58 | * @node: global list node | |
59 | * @dev: the device using this pin control handle | |
6e5e959d SW |
60 | * @states: a list of states for this device |
61 | * @state: the current state | |
57291ce2 SW |
62 | * @dt_maps: the mapping table chunks dynamically parsed from device tree for |
63 | * this device, if any | |
ab78029e | 64 | * @users: reference count |
befe5bdf LW |
65 | */ |
66 | struct pinctrl { | |
67 | struct list_head node; | |
68 | struct device *dev; | |
6e5e959d SW |
69 | struct list_head states; |
70 | struct pinctrl_state *state; | |
57291ce2 | 71 | struct list_head dt_maps; |
ab78029e | 72 | struct kref users; |
6e5e959d SW |
73 | }; |
74 | ||
75 | /** | |
76 | * struct pinctrl_state - a pinctrl state for a device | |
2c9abf80 | 77 | * @node: list node for struct pinctrl's @states field |
6e5e959d SW |
78 | * @name: the name of this state |
79 | * @settings: a list of settings for this state | |
80 | */ | |
81 | struct pinctrl_state { | |
82 | struct list_head node; | |
83 | const char *name; | |
7ecdb16f SW |
84 | struct list_head settings; |
85 | }; | |
86 | ||
1e2082b5 SW |
87 | /** |
88 | * struct pinctrl_setting_mux - setting data for MAP_TYPE_MUX_GROUP | |
89 | * @group: the group selector to program | |
90 | * @func: the function selector to program | |
91 | */ | |
92 | struct pinctrl_setting_mux { | |
93 | unsigned group; | |
94 | unsigned func; | |
95 | }; | |
96 | ||
97 | /** | |
98 | * struct pinctrl_setting_configs - setting data for MAP_TYPE_CONFIGS_* | |
99 | * @group_or_pin: the group selector or pin ID to program | |
100 | * @configs: a pointer to an array of config parameters/values to program into | |
101 | * hardware. Each individual pin controller defines the format and meaning | |
102 | * of config parameters. | |
103 | * @num_configs: the number of entries in array @configs | |
104 | */ | |
105 | struct pinctrl_setting_configs { | |
106 | unsigned group_or_pin; | |
107 | unsigned long *configs; | |
108 | unsigned num_configs; | |
109 | }; | |
110 | ||
7ecdb16f | 111 | /** |
872acc32 | 112 | * struct pinctrl_setting - an individual mux or config setting |
6e5e959d | 113 | * @node: list node for struct pinctrl_settings's @settings field |
1e2082b5 | 114 | * @type: the type of setting |
57291ce2 SW |
115 | * @pctldev: pin control device handling to be programmed. Not used for |
116 | * PIN_MAP_TYPE_DUMMY_STATE. | |
1a78958d | 117 | * @dev_name: the name of the device using this state |
1e2082b5 | 118 | * @data: Data specific to the setting type |
7ecdb16f SW |
119 | */ |
120 | struct pinctrl_setting { | |
121 | struct list_head node; | |
1e2082b5 | 122 | enum pinctrl_map_type type; |
befe5bdf | 123 | struct pinctrl_dev *pctldev; |
1a78958d | 124 | const char *dev_name; |
1e2082b5 SW |
125 | union { |
126 | struct pinctrl_setting_mux mux; | |
127 | struct pinctrl_setting_configs configs; | |
128 | } data; | |
2744e8af LW |
129 | }; |
130 | ||
131 | /** | |
132 | * struct pin_desc - pin descriptor for each physical pin in the arch | |
133 | * @pctldev: corresponding pin control device | |
134 | * @name: a name for the pin, e.g. the name of the pin/pad/finger on a | |
135 | * datasheet or such | |
ca53c5f1 | 136 | * @dynamic_name: if the name of this pin was dynamically allocated |
652162d4 | 137 | * @mux_usecount: If zero, the pin is not claimed, and @owner should be NULL. |
0e3db173 SW |
138 | * If non-zero, this pin is claimed by @owner. This field is an integer |
139 | * rather than a boolean, since pinctrl_get() might process multiple | |
140 | * mapping table entries that refer to, and hence claim, the same group | |
141 | * or pin, and each of these will increment the @usecount. | |
652162d4 | 142 | * @mux_owner: The name of device that called pinctrl_get(). |
ba110d90 | 143 | * @mux_setting: The most recent selected mux setting for this pin, if any. |
652162d4 SW |
144 | * @gpio_owner: If pinctrl_request_gpio() was called for this pin, this is |
145 | * the name of the GPIO that "owns" this pin. | |
2744e8af LW |
146 | */ |
147 | struct pin_desc { | |
148 | struct pinctrl_dev *pctldev; | |
9af1e44f | 149 | const char *name; |
ca53c5f1 | 150 | bool dynamic_name; |
2744e8af LW |
151 | /* These fields only added when supporting pinmux drivers */ |
152 | #ifdef CONFIG_PINMUX | |
652162d4 SW |
153 | unsigned mux_usecount; |
154 | const char *mux_owner; | |
ba110d90 | 155 | const struct pinctrl_setting_mux *mux_setting; |
652162d4 | 156 | const char *gpio_owner; |
2744e8af LW |
157 | #endif |
158 | }; | |
159 | ||
6f9e41f4 LM |
160 | /** |
161 | * struct pinctrl_maps - a list item containing part of the mapping table | |
162 | * @node: mapping table list node | |
163 | * @maps: array of mapping table entries | |
164 | * @num_maps: the number of entries in @maps | |
165 | */ | |
166 | struct pinctrl_maps { | |
167 | struct list_head node; | |
168 | struct pinctrl_map const *maps; | |
169 | unsigned num_maps; | |
170 | }; | |
171 | ||
9dfac4fd | 172 | struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name); |
42fed7ba | 173 | struct pinctrl_dev *get_pinctrl_dev_from_of_node(struct device_node *np); |
ae6b4d85 | 174 | int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name); |
dcb5dbc3 | 175 | const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin); |
7afde8ba LW |
176 | int pinctrl_get_group_selector(struct pinctrl_dev *pctldev, |
177 | const char *pin_group); | |
2304b473 SW |
178 | |
179 | static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, | |
180 | unsigned int pin) | |
181 | { | |
182 | return radix_tree_lookup(&pctldev->pin_desc_tree, pin); | |
183 | } | |
57b676f9 | 184 | |
57291ce2 | 185 | int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps, |
c4ea9141 | 186 | bool dup); |
57291ce2 SW |
187 | void pinctrl_unregister_map(struct pinctrl_map const *map); |
188 | ||
840a47ba JD |
189 | extern int pinctrl_force_sleep(struct pinctrl_dev *pctldev); |
190 | extern int pinctrl_force_default(struct pinctrl_dev *pctldev); | |
191 | ||
42fed7ba | 192 | extern struct mutex pinctrl_maps_mutex; |
6f9e41f4 LM |
193 | extern struct list_head pinctrl_maps; |
194 | ||
195 | #define for_each_maps(_maps_node_, _i_, _map_) \ | |
196 | list_for_each_entry(_maps_node_, &pinctrl_maps, node) \ | |
197 | for (_i_ = 0, _map_ = &_maps_node_->maps[_i_]; \ | |
198 | _i_ < _maps_node_->num_maps; \ | |
199 | _i_++, _map_ = &_maps_node_->maps[_i_]) |