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280 lines
9.1 KiB
280 lines
9.1 KiB
/* |
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* Remote Controller core header |
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* |
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* Copyright (C) 2009-2010 by Mauro Carvalho Chehab |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation version 2 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#ifndef _RC_CORE |
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#define _RC_CORE |
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#include <linux/spinlock.h> |
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#include <linux/kfifo.h> |
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#include <linux/time.h> |
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#include <linux/timer.h> |
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#include <media/rc-map.h> |
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extern int rc_core_debug; |
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#define IR_dprintk(level, fmt, ...) \ |
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do { \ |
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if (rc_core_debug >= level) \ |
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printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
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} while (0) |
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enum rc_driver_type { |
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RC_DRIVER_SCANCODE = 0, /* Driver or hardware generates a scancode */ |
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RC_DRIVER_IR_RAW, /* Needs a Infra-Red pulse/space decoder */ |
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}; |
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/** |
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* struct rc_scancode_filter - Filter scan codes. |
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* @data: Scancode data to match. |
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* @mask: Mask of bits of scancode to compare. |
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*/ |
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struct rc_scancode_filter { |
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u32 data; |
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u32 mask; |
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}; |
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/** |
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* enum rc_filter_type - Filter type constants. |
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* @RC_FILTER_NORMAL: Filter for normal operation. |
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* @RC_FILTER_WAKEUP: Filter for waking from suspend. |
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* @RC_FILTER_MAX: Number of filter types. |
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*/ |
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enum rc_filter_type { |
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RC_FILTER_NORMAL = 0, |
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RC_FILTER_WAKEUP, |
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RC_FILTER_MAX |
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}; |
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/** |
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* struct rc_dev - represents a remote control device |
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* @dev: driver model's view of this device |
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* @sysfs_groups: sysfs attribute groups |
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* @input_name: name of the input child device |
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* @input_phys: physical path to the input child device |
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* @input_id: id of the input child device (struct input_id) |
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* @driver_name: name of the hardware driver which registered this device |
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* @map_name: name of the default keymap |
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* @rc_map: current scan/key table |
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* @lock: used to ensure we've filled in all protocol details before |
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* anyone can call show_protocols or store_protocols |
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* @minor: unique minor remote control device number |
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* @raw: additional data for raw pulse/space devices |
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* @input_dev: the input child device used to communicate events to userspace |
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* @driver_type: specifies if protocol decoding is done in hardware or software |
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* @idle: used to keep track of RX state |
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* @allowed_protocols: bitmask with the supported RC_BIT_* protocols |
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* @enabled_protocols: bitmask with the enabled RC_BIT_* protocols |
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* @allowed_wakeup_protocols: bitmask with the supported RC_BIT_* wakeup protocols |
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* @enabled_wakeup_protocols: bitmask with the enabled RC_BIT_* wakeup protocols |
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* @scancode_filter: scancode filter |
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* @scancode_wakeup_filter: scancode wakeup filters |
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* @scancode_mask: some hardware decoders are not capable of providing the full |
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* scancode to the application. As this is a hardware limit, we can't do |
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* anything with it. Yet, as the same keycode table can be used with other |
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* devices, a mask is provided to allow its usage. Drivers should generally |
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* leave this field in blank |
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* @users: number of current users of the device |
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* @priv: driver-specific data |
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* @keylock: protects the remaining members of the struct |
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* @keypressed: whether a key is currently pressed |
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* @keyup_jiffies: time (in jiffies) when the current keypress should be released |
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* @timer_keyup: timer for releasing a keypress |
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* @last_keycode: keycode of last keypress |
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* @last_protocol: protocol of last keypress |
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* @last_scancode: scancode of last keypress |
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* @last_toggle: toggle value of last command |
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* @timeout: optional time after which device stops sending data |
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* @min_timeout: minimum timeout supported by device |
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* @max_timeout: maximum timeout supported by device |
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* @rx_resolution : resolution (in ns) of input sampler |
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* @tx_resolution: resolution (in ns) of output sampler |
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* @change_protocol: allow changing the protocol used on hardware decoders |
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* @change_wakeup_protocol: allow changing the protocol used for wakeup |
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* filtering |
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* @open: callback to allow drivers to enable polling/irq when IR input device |
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* is opened. |
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* @close: callback to allow drivers to disable polling/irq when IR input device |
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* is opened. |
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* @s_tx_mask: set transmitter mask (for devices with multiple tx outputs) |
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* @s_tx_carrier: set transmit carrier frequency |
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* @s_tx_duty_cycle: set transmit duty cycle (0% - 100%) |
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* @s_rx_carrier_range: inform driver about carrier it is expected to handle |
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* @tx_ir: transmit IR |
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* @s_idle: enable/disable hardware idle mode, upon which, |
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* device doesn't interrupt host until it sees IR pulses |
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* @s_learning_mode: enable wide band receiver used for learning |
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* @s_carrier_report: enable carrier reports |
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* @s_filter: set the scancode filter |
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* @s_wakeup_filter: set the wakeup scancode filter |
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*/ |
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struct rc_dev { |
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struct device dev; |
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const struct attribute_group *sysfs_groups[5]; |
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const char *input_name; |
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const char *input_phys; |
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struct input_id input_id; |
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char *driver_name; |
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const char *map_name; |
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struct rc_map rc_map; |
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struct mutex lock; |
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unsigned int minor; |
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struct ir_raw_event_ctrl *raw; |
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struct input_dev *input_dev; |
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enum rc_driver_type driver_type; |
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bool idle; |
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u64 allowed_protocols; |
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u64 enabled_protocols; |
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u64 allowed_wakeup_protocols; |
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u64 enabled_wakeup_protocols; |
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struct rc_scancode_filter scancode_filter; |
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struct rc_scancode_filter scancode_wakeup_filter; |
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u32 scancode_mask; |
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u32 users; |
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void *priv; |
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spinlock_t keylock; |
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bool keypressed; |
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unsigned long keyup_jiffies; |
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struct timer_list timer_keyup; |
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u32 last_keycode; |
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enum rc_type last_protocol; |
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u32 last_scancode; |
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u8 last_toggle; |
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u32 timeout; |
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u32 min_timeout; |
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u32 max_timeout; |
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u32 rx_resolution; |
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u32 tx_resolution; |
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int (*change_protocol)(struct rc_dev *dev, u64 *rc_type); |
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int (*change_wakeup_protocol)(struct rc_dev *dev, u64 *rc_type); |
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int (*open)(struct rc_dev *dev); |
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void (*close)(struct rc_dev *dev); |
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int (*s_tx_mask)(struct rc_dev *dev, u32 mask); |
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int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier); |
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int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle); |
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int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max); |
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int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n); |
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void (*s_idle)(struct rc_dev *dev, bool enable); |
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int (*s_learning_mode)(struct rc_dev *dev, int enable); |
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int (*s_carrier_report) (struct rc_dev *dev, int enable); |
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int (*s_filter)(struct rc_dev *dev, |
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struct rc_scancode_filter *filter); |
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int (*s_wakeup_filter)(struct rc_dev *dev, |
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struct rc_scancode_filter *filter); |
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}; |
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#define to_rc_dev(d) container_of(d, struct rc_dev, dev) |
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/* |
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* From rc-main.c |
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* Those functions can be used on any type of Remote Controller. They |
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* basically creates an input_dev and properly reports the device as a |
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* Remote Controller, at sys/class/rc. |
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*/ |
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struct rc_dev *rc_allocate_device(void); |
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void rc_free_device(struct rc_dev *dev); |
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int rc_register_device(struct rc_dev *dev); |
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void rc_unregister_device(struct rc_dev *dev); |
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int rc_open(struct rc_dev *rdev); |
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void rc_close(struct rc_dev *rdev); |
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void rc_repeat(struct rc_dev *dev); |
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void rc_keydown(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle); |
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void rc_keydown_notimeout(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle); |
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void rc_keyup(struct rc_dev *dev); |
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u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode); |
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/* |
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* From rc-raw.c |
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* The Raw interface is specific to InfraRed. It may be a good idea to |
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* split it later into a separate header. |
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*/ |
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enum raw_event_type { |
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IR_SPACE = (1 << 0), |
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IR_PULSE = (1 << 1), |
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IR_START_EVENT = (1 << 2), |
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IR_STOP_EVENT = (1 << 3), |
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}; |
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struct ir_raw_event { |
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union { |
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u32 duration; |
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struct { |
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u32 carrier; |
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u8 duty_cycle; |
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}; |
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}; |
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unsigned pulse:1; |
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unsigned reset:1; |
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unsigned timeout:1; |
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unsigned carrier_report:1; |
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}; |
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#define DEFINE_IR_RAW_EVENT(event) \ |
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struct ir_raw_event event = { \ |
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{ .duration = 0 } , \ |
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.pulse = 0, \ |
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.reset = 0, \ |
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.timeout = 0, \ |
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.carrier_report = 0 } |
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static inline void init_ir_raw_event(struct ir_raw_event *ev) |
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{ |
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memset(ev, 0, sizeof(*ev)); |
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} |
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#define IR_MAX_DURATION 500000000 /* 500 ms */ |
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#define US_TO_NS(usec) ((usec) * 1000) |
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#define MS_TO_US(msec) ((msec) * 1000) |
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#define MS_TO_NS(msec) ((msec) * 1000 * 1000) |
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void ir_raw_event_handle(struct rc_dev *dev); |
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int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev); |
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int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type); |
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int ir_raw_event_store_with_filter(struct rc_dev *dev, |
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struct ir_raw_event *ev); |
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void ir_raw_event_set_idle(struct rc_dev *dev, bool idle); |
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static inline void ir_raw_event_reset(struct rc_dev *dev) |
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{ |
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DEFINE_IR_RAW_EVENT(ev); |
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ev.reset = true; |
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ir_raw_event_store(dev, &ev); |
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ir_raw_event_handle(dev); |
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} |
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/* extract mask bits out of data and pack them into the result */ |
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static inline u32 ir_extract_bits(u32 data, u32 mask) |
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{ |
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u32 vbit = 1, value = 0; |
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do { |
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if (mask & 1) { |
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if (data & 1) |
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value |= vbit; |
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vbit <<= 1; |
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} |
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data >>= 1; |
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} while (mask >>= 1); |
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return value; |
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} |
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#endif /* _RC_CORE */
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