// SPDX-License-Identifier: GPL-2.0-only /* * AT and PS/2 keyboard driver * * Copyright (c) 1999-2002 Vojtech Pavlik */ /* * This driver can handle standard AT keyboards and PS/2 keyboards in * Translated and Raw Set 2 and Set 3, as well as AT keyboards on dumb * input-only controllers and AT keyboards connected over a one way RS232 * converter. */ #include <linux/delay.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/input.h> #include <linux/input/vivaldi-fmap.h> #include <linux/serio.h> #include <linux/workqueue.h> #include <linux/libps2.h> #include <linux/mutex.h> #include <linux/dmi.h> #include <linux/property.h> #define DRIVER_DESC … MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…); MODULE_LICENSE(…) …; static int atkbd_set = …; module_param_named(set, atkbd_set, int, 0); MODULE_PARM_DESC(…) …; #if defined(__i386__) || defined(__x86_64__) || defined(__hppa__) static bool atkbd_reset; #else static bool atkbd_reset = true; #endif module_param_named(reset, atkbd_reset, bool, 0); MODULE_PARM_DESC(…) …; static bool atkbd_softrepeat; module_param_named(softrepeat, atkbd_softrepeat, bool, 0); MODULE_PARM_DESC(…) …; static bool atkbd_softraw = …; module_param_named(softraw, atkbd_softraw, bool, 0); MODULE_PARM_DESC(…) …; static bool atkbd_scroll; module_param_named(scroll, atkbd_scroll, bool, 0); MODULE_PARM_DESC(…) …; static bool atkbd_extra; module_param_named(extra, atkbd_extra, bool, 0); MODULE_PARM_DESC(…) …; static bool atkbd_terminal; module_param_named(terminal, atkbd_terminal, bool, 0); MODULE_PARM_DESC(…) …; #define SCANCODE(keymap) … #define KEYCODE(keymap) … /* * Scancode to keycode tables. These are just the default setting, and * are loadable via a userland utility. */ #define ATKBD_KEYMAP_SIZE … static const unsigned short atkbd_set2_keycode[ATKBD_KEYMAP_SIZE] = …; static const unsigned short atkbd_set3_keycode[ATKBD_KEYMAP_SIZE] = …; static const unsigned short atkbd_unxlate_table[128] = …; #define ATKBD_CMD_SETLEDS … #define ATKBD_CMD_GSCANSET … #define ATKBD_CMD_SSCANSET … #define ATKBD_CMD_GETID … #define ATKBD_CMD_SETREP … #define ATKBD_CMD_ENABLE … #define ATKBD_CMD_RESET_DIS … #define ATKBD_CMD_RESET_DEF … #define ATKBD_CMD_SETALL_MB … #define ATKBD_CMD_SETALL_MBR … #define ATKBD_CMD_RESET_BAT … #define ATKBD_CMD_RESEND … #define ATKBD_CMD_EX_ENABLE … #define ATKBD_CMD_EX_SETLEDS … #define ATKBD_CMD_OK_GETID … #define ATKBD_RET_ACK … #define ATKBD_RET_NAK … #define ATKBD_RET_BAT … #define ATKBD_RET_EMUL0 … #define ATKBD_RET_EMUL1 … #define ATKBD_RET_RELEASE … #define ATKBD_RET_HANJA … #define ATKBD_RET_HANGEUL … #define ATKBD_RET_ERR … #define ATKBD_KEY_UNKNOWN … #define ATKBD_KEY_NULL … #define ATKBD_SCR_1 … #define ATKBD_SCR_2 … #define ATKBD_SCR_4 … #define ATKBD_SCR_8 … #define ATKBD_SCR_CLICK … #define ATKBD_SCR_LEFT … #define ATKBD_SCR_RIGHT … #define ATKBD_SPECIAL … #define ATKBD_LED_EVENT_BIT … #define ATKBD_REP_EVENT_BIT … #define ATKBD_XL_ERR … #define ATKBD_XL_BAT … #define ATKBD_XL_ACK … #define ATKBD_XL_NAK … #define ATKBD_XL_HANGEUL … #define ATKBD_XL_HANJA … static const struct { … } atkbd_scroll_keys[] = …; /* * The atkbd control structure */ struct atkbd { … }; /* * System-specific keymap fixup routine */ static void (*atkbd_platform_fixup)(struct atkbd *, const void *data); static void *atkbd_platform_fixup_data; static unsigned int (*atkbd_platform_scancode_fixup)(struct atkbd *, unsigned int); /* * Certain keyboards to not like ATKBD_CMD_RESET_DIS and stop responding * to many commands until full reset (ATKBD_CMD_RESET_BAT) is performed. */ static bool atkbd_skip_deactivate; static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf, ssize_t (*handler)(struct atkbd *, char *)); static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count, ssize_t (*handler)(struct atkbd *, const char *, size_t)); #define ATKBD_DEFINE_ATTR(_name) … ATKBD_DEFINE_ATTR(extra); ATKBD_DEFINE_ATTR(force_release); ATKBD_DEFINE_ATTR(scroll); ATKBD_DEFINE_ATTR(set); ATKBD_DEFINE_ATTR(softrepeat); ATKBD_DEFINE_ATTR(softraw); #define ATKBD_DEFINE_RO_ATTR(_name) … ATKBD_DEFINE_RO_ATTR(err_count); ATKBD_DEFINE_RO_ATTR(function_row_physmap); static struct attribute *atkbd_attributes[] = …; static ssize_t atkbd_show_function_row_physmap(struct atkbd *atkbd, char *buf) { … } static struct atkbd *atkbd_from_serio(struct serio *serio) { … } static umode_t atkbd_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i) { … } static const struct attribute_group atkbd_attribute_group = …; __ATTRIBUTE_GROUPS(…); static const unsigned int xl_table[] = …; /* * Checks if we should mangle the scancode to extract 'release' bit * in translated mode. */ static bool atkbd_need_xlate(unsigned long xl_bit, unsigned char code) { … } /* * Calculates new value of xl_bit so the driver can distinguish * between make/break pair of scancodes for select keys and PS/2 * protocol responses. */ static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code) { … } /* * Encode the scancode, 0xe0 prefix, and high bit into a single integer, * keeping kernel 2.4 compatibility for set 2 */ static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code) { … } /* * Tries to handle frame or parity error by requesting the keyboard controller * to resend the last byte. This historically not done on x86 as controllers * there typically do not implement this command. */ static bool __maybe_unused atkbd_handle_frame_error(struct ps2dev *ps2dev, u8 data, unsigned int flags) { … } static enum ps2_disposition atkbd_pre_receive_byte(struct ps2dev *ps2dev, u8 data, unsigned int flags) { … } static void atkbd_receive_byte(struct ps2dev *ps2dev, u8 data) { … } static int atkbd_set_repeat_rate(struct atkbd *atkbd) { … } static int atkbd_set_leds(struct atkbd *atkbd) { … } /* * atkbd_event_work() is used to complete processing of events that * can not be processed by input_event() which is often called from * interrupt context. */ static void atkbd_event_work(struct work_struct *work) { … } /* * Schedule switch for execution. We need to throttle requests, * otherwise keyboard may become unresponsive. */ static void atkbd_schedule_event_work(struct atkbd *atkbd, int event_bit) { … } /* * Event callback from the input module. Events that change the state of * the hardware are processed here. If action can not be performed in * interrupt context it is offloaded to atkbd_event_work. */ static int atkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { … } /* * atkbd_enable() signals that interrupt handler is allowed to * generate input events. */ static inline void atkbd_enable(struct atkbd *atkbd) { … } /* * atkbd_disable() tells input handler that all incoming data except * for ACKs and command response should be dropped. */ static inline void atkbd_disable(struct atkbd *atkbd) { … } static int atkbd_activate(struct atkbd *atkbd) { … } /* * atkbd_deactivate() resets and disables the keyboard from sending * keystrokes. */ static void atkbd_deactivate(struct atkbd *atkbd) { … } #ifdef CONFIG_X86 static bool atkbd_is_portable_device(void) { … } /* * On many modern laptops ATKBD_CMD_GETID may cause problems, on these laptops * the controller is always in translated mode. In this mode mice/touchpads will * not work. So in this case simply assume a keyboard is connected to avoid * confusing some laptop keyboards. * * Skipping ATKBD_CMD_GETID ends up using a fake keyboard id. Using the standard * 0xab83 id is ok in translated mode, only atkbd_select_set() checks atkbd->id * and in translated mode that is a no-op. */ static bool atkbd_skip_getid(struct atkbd *atkbd) { … } #else static inline bool atkbd_skip_getid(struct atkbd *atkbd) { return false; } #endif /* * atkbd_probe() probes for an AT keyboard on a serio port. */ static int atkbd_probe(struct atkbd *atkbd) { … } /* * atkbd_select_set checks if a keyboard has a working Set 3 support, and * sets it into that. Unfortunately there are keyboards that can be switched * to Set 3, but don't work well in that (BTC Multimedia ...) */ static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra) { … } static int atkbd_reset_state(struct atkbd *atkbd) { … } /* * atkbd_cleanup() restores the keyboard state so that BIOS is happy after a * reboot. */ static void atkbd_cleanup(struct serio *serio) { … } /* * atkbd_disconnect() closes and frees. */ static void atkbd_disconnect(struct serio *serio) { … } /* * generate release events for the keycodes given in data */ static void atkbd_apply_forced_release_keylist(struct atkbd* atkbd, const void *data) { … } /* * Most special keys (Fn+F?) on Dell laptops do not generate release * events so we have to do it ourselves. */ static unsigned int atkbd_dell_laptop_forced_release_keys[] = …; /* * Perform fixup for HP system that doesn't generate release * for its video switch */ static unsigned int atkbd_hp_forced_release_keys[] = …; /* * Samsung NC10,NC20 with Fn+F? key release not working */ static unsigned int atkbd_samsung_forced_release_keys[] = …; /* * Amilo Pi 3525 key release for Fn+Volume keys not working */ static unsigned int atkbd_amilo_pi3525_forced_release_keys[] = …; /* * Amilo Xi 3650 key release for light touch bar not working */ static unsigned int atkbd_amilo_xi3650_forced_release_keys[] = …; /* * Soltech TA12 system with broken key release on volume keys and mute key */ static unsigned int atkdb_soltech_ta12_forced_release_keys[] = …; /* * Many notebooks don't send key release event for volume up/down * keys, with key list below common among them */ static unsigned int atkbd_volume_forced_release_keys[] = …; /* * OQO 01+ multimedia keys (64--66) generate e0 6x upon release whereas * they should be generating e4-e6 (0x80 | code). */ static unsigned int atkbd_oqo_01plus_scancode_fixup(struct atkbd *atkbd, unsigned int code) { … } static int atkbd_get_keymap_from_fwnode(struct atkbd *atkbd) { … } /* * atkbd_set_keycode_table() initializes keyboard's keycode table * according to the selected scancode set */ static void atkbd_set_keycode_table(struct atkbd *atkbd) { … } /* * atkbd_set_device_attrs() sets up keyboard's input device structure */ static void atkbd_set_device_attrs(struct atkbd *atkbd) { … } static void atkbd_parse_fwnode_data(struct serio *serio) { … } /* * atkbd_connect() is called when the serio module finds an interface * that isn't handled yet by an appropriate device driver. We check if * there is an AT keyboard out there and if yes, we register ourselves * to the input module. */ static int atkbd_connect(struct serio *serio, struct serio_driver *drv) { … } /* * atkbd_reconnect() tries to restore keyboard into a sane state and is * most likely called on resume. */ static int atkbd_reconnect(struct serio *serio) { … } static const struct serio_device_id atkbd_serio_ids[] = …; MODULE_DEVICE_TABLE(serio, atkbd_serio_ids); static struct serio_driver atkbd_drv = …; static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf, ssize_t (*handler)(struct atkbd *, char *)) { … } static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count, ssize_t (*handler)(struct atkbd *, const char *, size_t)) { … } static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf) { … } static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count) { … } static ssize_t atkbd_show_force_release(struct atkbd *atkbd, char *buf) { … } static ssize_t atkbd_set_force_release(struct atkbd *atkbd, const char *buf, size_t count) { … } static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf) { … } static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count) { … } static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf) { … } static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count) { … } static ssize_t atkbd_show_softrepeat(struct atkbd *atkbd, char *buf) { … } static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t count) { … } static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf) { … } static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count) { … } static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf) { … } static int __init atkbd_setup_forced_release(const struct dmi_system_id *id) { … } static int __init atkbd_setup_scancode_fixup(const struct dmi_system_id *id) { … } static int __init atkbd_deactivate_fixup(const struct dmi_system_id *id) { … } /* * NOTE: do not add any more "force release" quirks to this table. The * task of adjusting list of keys that should be "released" automatically * by the driver is now delegated to userspace tools, such as udev, so * submit such quirks there. */ static const struct dmi_system_id atkbd_dmi_quirk_table[] __initconst = …; static int __init atkbd_init(void) { … } static void __exit atkbd_exit(void) { … } module_init(…) …; module_exit(atkbd_exit);
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