2 * Remote Controller core header
4 * Copyright (C) 2009-2010 by Mauro Carvalho Chehab
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
19 #include <linux/spinlock.h>
20 #include <linux/kfifo.h>
21 #include <linux/time.h>
22 #include <linux/timer.h>
23 #include <media/rc-map.h>
25 extern int rc_core_debug;
26 #define IR_dprintk(level, fmt, ...) \
28 if (rc_core_debug >= level) \
29 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
33 * enum rc_driver_type - type of the RC output
35 * @RC_DRIVER_SCANCODE: Driver or hardware generates a scancode
36 * @RC_DRIVER_IR_RAW: Driver or hardware generates pulse/space sequences.
37 * It needs a Infra-Red pulse/space decoder
38 * @RC_DRIVER_IR_RAW_TX: Device transmitter only,
39 * driver requires pulse/space data sequence.
42 RC_DRIVER_SCANCODE = 0,
48 * struct rc_scancode_filter - Filter scan codes.
49 * @data: Scancode data to match.
50 * @mask: Mask of bits of scancode to compare.
52 struct rc_scancode_filter {
58 * enum rc_filter_type - Filter type constants.
59 * @RC_FILTER_NORMAL: Filter for normal operation.
60 * @RC_FILTER_WAKEUP: Filter for waking from suspend.
61 * @RC_FILTER_MAX: Number of filter types.
71 * struct rc_dev - represents a remote control device
72 * @dev: driver model's view of this device
73 * @managed_alloc: devm_rc_allocate_device was used to create rc_dev
74 * @sysfs_groups: sysfs attribute groups
75 * @input_name: name of the input child device
76 * @input_phys: physical path to the input child device
77 * @input_id: id of the input child device (struct input_id)
78 * @driver_name: name of the hardware driver which registered this device
79 * @map_name: name of the default keymap
80 * @rc_map: current scan/key table
81 * @lock: used to ensure we've filled in all protocol details before
82 * anyone can call show_protocols or store_protocols
83 * @minor: unique minor remote control device number
84 * @raw: additional data for raw pulse/space devices
85 * @input_dev: the input child device used to communicate events to userspace
86 * @driver_type: specifies if protocol decoding is done in hardware or software
87 * @idle: used to keep track of RX state
88 * @encode_wakeup: wakeup filtering uses IR encode API, therefore the allowed
89 * wakeup protocols is the set of all raw encoders
90 * @allowed_protocols: bitmask with the supported RC_BIT_* protocols
91 * @enabled_protocols: bitmask with the enabled RC_BIT_* protocols
92 * @allowed_wakeup_protocols: bitmask with the supported RC_BIT_* wakeup protocols
93 * @wakeup_protocol: the enabled RC_TYPE_* wakeup protocol or
94 * RC_TYPE_UNKNOWN if disabled.
95 * @scancode_filter: scancode filter
96 * @scancode_wakeup_filter: scancode wakeup filters
97 * @scancode_mask: some hardware decoders are not capable of providing the full
98 * scancode to the application. As this is a hardware limit, we can't do
99 * anything with it. Yet, as the same keycode table can be used with other
100 * devices, a mask is provided to allow its usage. Drivers should generally
101 * leave this field in blank
102 * @users: number of current users of the device
103 * @priv: driver-specific data
104 * @keylock: protects the remaining members of the struct
105 * @keypressed: whether a key is currently pressed
106 * @keyup_jiffies: time (in jiffies) when the current keypress should be released
107 * @timer_keyup: timer for releasing a keypress
108 * @last_keycode: keycode of last keypress
109 * @last_protocol: protocol of last keypress
110 * @last_scancode: scancode of last keypress
111 * @last_toggle: toggle value of last command
112 * @timeout: optional time after which device stops sending data
113 * @min_timeout: minimum timeout supported by device
114 * @max_timeout: maximum timeout supported by device
115 * @rx_resolution : resolution (in ns) of input sampler
116 * @tx_resolution: resolution (in ns) of output sampler
117 * @change_protocol: allow changing the protocol used on hardware decoders
118 * @open: callback to allow drivers to enable polling/irq when IR input device
120 * @close: callback to allow drivers to disable polling/irq when IR input device
122 * @s_tx_mask: set transmitter mask (for devices with multiple tx outputs)
123 * @s_tx_carrier: set transmit carrier frequency
124 * @s_tx_duty_cycle: set transmit duty cycle (0% - 100%)
125 * @s_rx_carrier_range: inform driver about carrier it is expected to handle
126 * @tx_ir: transmit IR
127 * @s_idle: enable/disable hardware idle mode, upon which,
128 * device doesn't interrupt host until it sees IR pulses
129 * @s_learning_mode: enable wide band receiver used for learning
130 * @s_carrier_report: enable carrier reports
131 * @s_filter: set the scancode filter
132 * @s_wakeup_filter: set the wakeup scancode filter. If the mask is zero
133 * then wakeup should be disabled. wakeup_protocol will be set to
134 * a valid protocol if mask is nonzero.
135 * @s_timeout: set hardware timeout in ns
140 const struct attribute_group *sysfs_groups[5];
141 const char *input_name;
142 const char *input_phys;
143 struct input_id input_id;
145 const char *map_name;
146 struct rc_map rc_map;
149 struct ir_raw_event_ctrl *raw;
150 struct input_dev *input_dev;
151 enum rc_driver_type driver_type;
154 u64 allowed_protocols;
155 u64 enabled_protocols;
156 u64 allowed_wakeup_protocols;
157 enum rc_type wakeup_protocol;
158 struct rc_scancode_filter scancode_filter;
159 struct rc_scancode_filter scancode_wakeup_filter;
165 unsigned long keyup_jiffies;
166 struct timer_list timer_keyup;
168 enum rc_type last_protocol;
176 int (*change_protocol)(struct rc_dev *dev, u64 *rc_type);
177 int (*open)(struct rc_dev *dev);
178 void (*close)(struct rc_dev *dev);
179 int (*s_tx_mask)(struct rc_dev *dev, u32 mask);
180 int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier);
181 int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle);
182 int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max);
183 int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n);
184 void (*s_idle)(struct rc_dev *dev, bool enable);
185 int (*s_learning_mode)(struct rc_dev *dev, int enable);
186 int (*s_carrier_report) (struct rc_dev *dev, int enable);
187 int (*s_filter)(struct rc_dev *dev,
188 struct rc_scancode_filter *filter);
189 int (*s_wakeup_filter)(struct rc_dev *dev,
190 struct rc_scancode_filter *filter);
191 int (*s_timeout)(struct rc_dev *dev,
192 unsigned int timeout);
195 #define to_rc_dev(d) container_of(d, struct rc_dev, dev)
199 * Those functions can be used on any type of Remote Controller. They
200 * basically creates an input_dev and properly reports the device as a
201 * Remote Controller, at sys/class/rc.
205 * rc_allocate_device - Allocates a RC device
207 * @rc_driver_type: specifies the type of the RC output to be allocated
208 * returns a pointer to struct rc_dev.
210 struct rc_dev *rc_allocate_device(enum rc_driver_type);
213 * devm_rc_allocate_device - Managed RC device allocation
215 * @dev: pointer to struct device
216 * @rc_driver_type: specifies the type of the RC output to be allocated
217 * returns a pointer to struct rc_dev.
219 struct rc_dev *devm_rc_allocate_device(struct device *dev, enum rc_driver_type);
222 * rc_free_device - Frees a RC device
224 * @dev: pointer to struct rc_dev.
226 void rc_free_device(struct rc_dev *dev);
229 * rc_register_device - Registers a RC device
231 * @dev: pointer to struct rc_dev.
233 int rc_register_device(struct rc_dev *dev);
236 * devm_rc_register_device - Manageded registering of a RC device
238 * @parent: pointer to struct device.
239 * @dev: pointer to struct rc_dev.
241 int devm_rc_register_device(struct device *parent, struct rc_dev *dev);
244 * rc_unregister_device - Unregisters a RC device
246 * @dev: pointer to struct rc_dev.
248 void rc_unregister_device(struct rc_dev *dev);
251 * rc_open - Opens a RC device
253 * @rdev: pointer to struct rc_dev.
255 int rc_open(struct rc_dev *rdev);
258 * rc_close - Closes a RC device
260 * @rdev: pointer to struct rc_dev.
262 void rc_close(struct rc_dev *rdev);
264 void rc_repeat(struct rc_dev *dev);
265 void rc_keydown(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle);
266 void rc_keydown_notimeout(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle);
267 void rc_keyup(struct rc_dev *dev);
268 u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode);
272 * The Raw interface is specific to InfraRed. It may be a good idea to
273 * split it later into a separate header.
276 enum raw_event_type {
279 IR_START_EVENT = (1 << 2),
280 IR_STOP_EVENT = (1 << 3),
283 struct ir_raw_event {
293 unsigned carrier_report:1;
296 #define DEFINE_IR_RAW_EVENT(event) struct ir_raw_event event = {}
298 static inline void init_ir_raw_event(struct ir_raw_event *ev)
300 memset(ev, 0, sizeof(*ev));
303 #define IR_DEFAULT_TIMEOUT MS_TO_NS(125)
304 #define IR_MAX_DURATION 500000000 /* 500 ms */
305 #define US_TO_NS(usec) ((usec) * 1000)
306 #define MS_TO_US(msec) ((msec) * 1000)
307 #define MS_TO_NS(msec) ((msec) * 1000 * 1000)
309 void ir_raw_event_handle(struct rc_dev *dev);
310 int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev);
311 int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type);
312 int ir_raw_event_store_with_filter(struct rc_dev *dev,
313 struct ir_raw_event *ev);
314 void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
315 int ir_raw_encode_scancode(enum rc_type protocol, u32 scancode,
316 struct ir_raw_event *events, unsigned int max);
318 static inline void ir_raw_event_reset(struct rc_dev *dev)
320 struct ir_raw_event ev = { .reset = true };
322 ir_raw_event_store(dev, &ev);
323 ir_raw_event_handle(dev);
326 /* extract mask bits out of data and pack them into the result */
327 static inline u32 ir_extract_bits(u32 data, u32 mask)
329 u32 vbit = 1, value = 0;
338 } while (mask >>= 1);
343 #endif /* _RC_CORE */