From 034dd340b08be1f2f0477ad16131d609f9dbd53c Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 30 Aug 2026 09:22:00 -0700 Subject: Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Fix error output of boot instance creation failure Currently if a boot instance creation fails, instead of printing out the name of the instance that failed, it prints "(null)". That is because it prints "cur_str" that had already been processed by strsep(). Print the saved name instead. While at it, print the error code of the failure. - Fix use-after-free for same named historgrams Histograms can be named so that they can be used in multiple events. But if the named histogram has a variable attached, the second event that uses the named histogram which duplicates it and needs to free the original after duplication leaves the old variable in place and still visible. If another histogram uses than variable, it will use the stale one which will try to reference the freed duplicate histogram and crash the kernel. Free the duplicate variables along with the duplicated histogram data. - Check return value of kthread_run() in event self test The events self tests uses a kthread for testing but does not check if it succeeded in creating a kthread. If the kthread creation were to fail, the code will still try to call kthread_stop() on the error returned. - Fix race between reading trace_pipe and updating subbuffer size If a user is reading the trace_pipe file at the same time they update the ring buffer sub-buffer size, can cause the trace_pipe read to read stale data. Add trace_access_lock() around updating the ring buffer sub-buffer size. - Fix eventfs_inode on failure path in creation of the events directory In the creation of the "events" directory, if after allocating the eventfs_inode a failure is detected, it calls cleanup_ei() which calls free_ei(). The free_ei() will test if eventfs_inode being freed has no children. It is a bug if it does. But on the failure case of the creation of the "events" directory, the children lists have not yet been initialized and the free will trigger a warning because list_empty() on an uninitialized list returns false. Move the initialization into init_ei() where it makes more sense and makes sure that a created eventfs_inode has its lists initialized upon creation. - Check return value of kthread_run() in ftrace direct sample code The sample code that shows how to use the ftrace direct calls does not test the return of kthread_run() to see if it succeeds. Return a failure if the kthread_run() doesn't succeed. - Clear user events state on fork in case of alloc failure On fork, the child gets a pointer to the parent's user events state. It makes a copy of it then updates the child's pointer to it. But if the allocation fails, the duplication function leaves the child with a pointer to its parent's descriptor. When the child cleans up its data, it will free the parent's descriptor while the parent is still using it. In the duplication function, set the child's user_event_mm to NULL before testing if the allocation succeeded, and when it exits it will not free the parent's descriptor. - Fix retry exhaustion in simple ring buffer reader swap simple_ring_buffer_swap_reader_page() starts with retry set to 8 and post-decrements it only after a failed link replacement. On the final attempt, a successful replacement leaves retry at zero, while a failed replacement leaves it at -1. But the check for success expects the retry value to be non-zero and exits with an error on zero. This is the opposite result. Fix it. - Fail nicely when the remote swap_reader_page() returns an error Currently, if the swap_reader_page() of a remote buffer fails, it triggers a WARN_ON_ONCE() and continues normally. Instead, have it exit with an error and a pr_warn() print instead of a full WARNING. * tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: ring-buffer: Stop remote reader update when page swap fails tracing: Fix retry exhaustion in simple ring buffer reader swap tracing/user_events: Clear copied tracing state before fork duplication samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify eventfs: Initialize ei->children and ei->list in init_ei() tracing: Fix use-after-free in trace_pipe read on sub-buffer order change tracing: Fix crash passing ERR_PTR to kthread_stop() tracing: Fix use-after-free with same-name named triggers tracing: Fix logged instance name on creation failure --- drivers/input/mouse/alps.h | 329 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 329 insertions(+) create mode 100644 drivers/input/mouse/alps.h (limited to 'drivers/input/mouse/alps.h') diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h new file mode 100644 index 000000000..17bbf6cdb --- /dev/null +++ b/drivers/input/mouse/alps.h @@ -0,0 +1,329 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * ALPS touchpad PS/2 mouse driver + * + * Copyright (c) 2003 Peter Osterlund + * Copyright (c) 2005 Vojtech Pavlik + */ + +#ifndef _ALPS_H +#define _ALPS_H + +#include + +#define ALPS_PROTO_V1 0x100 +#define ALPS_PROTO_V2 0x200 +#define ALPS_PROTO_V3 0x300 +#define ALPS_PROTO_V3_RUSHMORE 0x310 +#define ALPS_PROTO_V4 0x400 +#define ALPS_PROTO_V5 0x500 +#define ALPS_PROTO_V6 0x600 +#define ALPS_PROTO_V7 0x700 /* t3btl t4s */ +#define ALPS_PROTO_V8 0x800 /* SS4btl SS4s */ +#define ALPS_PROTO_V9 0x900 /* ss3btl */ + +#define MAX_TOUCHES 4 + +#define DOLPHIN_COUNT_PER_ELECTRODE 64 +#define DOLPHIN_PROFILE_XOFFSET 8 /* x-electrode offset */ +#define DOLPHIN_PROFILE_YOFFSET 1 /* y-electrode offset */ + +/* + * enum SS4_PACKET_ID - defines the packet type for V8 + * SS4_PACKET_ID_IDLE: There's no finger and no button activity. + * SS4_PACKET_ID_ONE: There's one finger on touchpad + * or there's button activities. + * SS4_PACKET_ID_TWO: There's two or more fingers on touchpad + * SS4_PACKET_ID_MULTI: There's three or more fingers on touchpad + * SS4_PACKET_ID_STICK: A stick pointer packet +*/ +enum SS4_PACKET_ID { + SS4_PACKET_ID_IDLE = 0, + SS4_PACKET_ID_ONE, + SS4_PACKET_ID_TWO, + SS4_PACKET_ID_MULTI, + SS4_PACKET_ID_STICK, +}; + +#define SS4_COUNT_PER_ELECTRODE 256 +#define SS4_NUMSENSOR_XOFFSET 7 +#define SS4_NUMSENSOR_YOFFSET 7 +#define SS4_MIN_PITCH_MM 50 + +#define SS4_MASK_NORMAL_BUTTONS 0x07 + +#define SS4PLUS_COUNT_PER_ELECTRODE 128 +#define SS4PLUS_NUMSENSOR_XOFFSET 16 +#define SS4PLUS_NUMSENSOR_YOFFSET 5 +#define SS4PLUS_MIN_PITCH_MM 37 + +#define IS_SS4PLUS_DEV(_b) (((_b[0]) == 0x73) && \ + ((_b[1]) == 0x03) && \ + ((_b[2]) == 0x28) \ + ) + +#define SS4_IS_IDLE_V2(_b) (((_b[0]) == 0x18) && \ + ((_b[1]) == 0x10) && \ + ((_b[2]) == 0x00) && \ + ((_b[3] & 0x88) == 0x08) && \ + ((_b[4]) == 0x10) && \ + ((_b[5]) == 0x00) \ + ) + +#define SS4_1F_X_V2(_b) (((_b[0]) & 0x0007) | \ + ((_b[1] << 3) & 0x0078) | \ + ((_b[1] << 2) & 0x0380) | \ + ((_b[2] << 5) & 0x1C00) \ + ) + +#define SS4_1F_Y_V2(_b) (((_b[2]) & 0x000F) | \ + ((_b[3] >> 2) & 0x0030) | \ + ((_b[4] << 6) & 0x03C0) | \ + ((_b[4] << 5) & 0x0C00) \ + ) + +#define SS4_1F_Z_V2(_b) (((_b[5]) & 0x0F) | \ + ((_b[5] >> 1) & 0x70) | \ + ((_b[4]) & 0x80) \ + ) + +#define SS4_1F_LFB_V2(_b) (((_b[2] >> 4) & 0x01) == 0x01) + +#define SS4_MF_LF_V2(_b, _i) ((_b[1 + (_i) * 3] & 0x0004) == 0x0004) + +#define SS4_BTN_V2(_b) ((_b[0] >> 5) & SS4_MASK_NORMAL_BUTTONS) + +#define SS4_STD_MF_X_V2(_b, _i) (((_b[0 + (_i) * 3] << 5) & 0x00E0) | \ + ((_b[1 + _i * 3] << 5) & 0x1F00) \ + ) + +#define SS4_PLUS_STD_MF_X_V2(_b, _i) (((_b[0 + (_i) * 3] << 4) & 0x0070) | \ + ((_b[1 + (_i) * 3] << 4) & 0x0F80) \ + ) + +#define SS4_STD_MF_Y_V2(_b, _i) (((_b[1 + (_i) * 3] << 3) & 0x0010) | \ + ((_b[2 + (_i) * 3] << 5) & 0x01E0) | \ + ((_b[2 + (_i) * 3] << 4) & 0x0E00) \ + ) + +#define SS4_BTL_MF_X_V2(_b, _i) (SS4_STD_MF_X_V2(_b, _i) | \ + ((_b[0 + (_i) * 3] >> 3) & 0x0010) \ + ) + +#define SS4_PLUS_BTL_MF_X_V2(_b, _i) (SS4_PLUS_STD_MF_X_V2(_b, _i) | \ + ((_b[0 + (_i) * 3] >> 4) & 0x0008) \ + ) + +#define SS4_BTL_MF_Y_V2(_b, _i) (SS4_STD_MF_Y_V2(_b, _i) | \ + ((_b[0 + (_i) * 3] >> 3) & 0x0008) \ + ) + +#define SS4_MF_Z_V2(_b, _i) (((_b[1 + (_i) * 3]) & 0x0001) | \ + ((_b[1 + (_i) * 3] >> 1) & 0x0002) \ + ) + +#define SS4_IS_MF_CONTINUE(_b) ((_b[2] & 0x10) == 0x10) +#define SS4_IS_5F_DETECTED(_b) ((_b[2] & 0x10) == 0x10) + +#define SS4_TS_X_V2(_b) (s8)( \ + ((_b[0] & 0x01) << 7) | \ + (_b[1] & 0x7F) \ + ) + +#define SS4_TS_Y_V2(_b) -(s8)( \ + ((_b[3] & 0x01) << 7) | \ + (_b[2] & 0x7F) \ + ) + +#define SS4_TS_Z_V2(_b) (s8)(_b[4] & 0x7F) + + +#define SS4_MFPACKET_NO_AX 8160 /* X-Coordinate value */ +#define SS4_MFPACKET_NO_AY 4080 /* Y-Coordinate value */ +#define SS4_MFPACKET_NO_AX_BL 8176 /* Buttonless X-Coord value */ +#define SS4_MFPACKET_NO_AY_BL 4088 /* Buttonless Y-Coord value */ +#define SS4_PLUS_MFPACKET_NO_AX 4080 /* SS4 PLUS, X */ +#define SS4_PLUS_MFPACKET_NO_AX_BL 4088 /* Buttonless SS4 PLUS, X */ + +/* + * enum V7_PACKET_ID - defines the packet type for V7 + * V7_PACKET_ID_IDLE: There's no finger and no button activity. + * V7_PACKET_ID_TWO: There's one or two non-resting fingers on touchpad + * or there's button activities. + * V7_PACKET_ID_MULTI: There are at least three non-resting fingers. + * V7_PACKET_ID_NEW: The finger position in slot is not continues from + * previous packet. +*/ +enum V7_PACKET_ID { + V7_PACKET_ID_IDLE, + V7_PACKET_ID_TWO, + V7_PACKET_ID_MULTI, + V7_PACKET_ID_NEW, + V7_PACKET_ID_UNKNOWN, +}; + +/** + * struct alps_protocol_info - information about protocol used by a device + * @version: Indicates V1/V2/V3/... + * @byte0: Helps figure out whether a position report packet matches the + * known format for this model. The first byte of the report, ANDed with + * mask0, should match byte0. + * @mask0: The mask used to check the first byte of the report. + * @flags: Additional device capabilities (passthrough port, trackstick, etc.). + */ +struct alps_protocol_info { + u16 version; + u8 byte0, mask0; + unsigned int flags; +}; + +/** + * struct alps_model_info - touchpad ID table + * @signature: E7 response string to match. + * @protocol_info: information about protocol used by the device. + * + * Many (but not all) ALPS touchpads can be identified by looking at the + * values returned in the "E7 report" and/or the "EC report." This table + * lists a number of such touchpads. + */ +struct alps_model_info { + u8 signature[3]; + struct alps_protocol_info protocol_info; +}; + +/** + * struct alps_nibble_commands - encodings for register accesses + * @command: PS/2 command used for the nibble + * @data: Data supplied as an argument to the PS/2 command, if applicable + * + * The ALPS protocol uses magic sequences to transmit binary data to the + * touchpad, as it is generally not OK to send arbitrary bytes out the + * PS/2 port. Each of the sequences in this table sends one nibble of the + * register address or (write) data. Different versions of the ALPS protocol + * use slightly different encodings. + */ +struct alps_nibble_commands { + int command; + unsigned char data; +}; + +struct alps_bitmap_point { + int start_bit; + int num_bits; +}; + +/** + * struct alps_fields - decoded version of the report packet + * @x_map: Bitmap of active X positions for MT. + * @y_map: Bitmap of active Y positions for MT. + * @fingers: Number of fingers for MT. + * @pressure: Pressure. + * @st: position for ST. + * @mt: position for MT. + * @first_mp: Packet is the first of a multi-packet report. + * @is_mp: Packet is part of a multi-packet report. + * @left: Left touchpad button is active. + * @right: Right touchpad button is active. + * @middle: Middle touchpad button is active. + * @ts_left: Left trackstick button is active. + * @ts_right: Right trackstick button is active. + * @ts_middle: Middle trackstick button is active. + */ +struct alps_fields { + unsigned int x_map; + unsigned int y_map; + unsigned int fingers; + + int pressure; + struct input_mt_pos st; + struct input_mt_pos mt[MAX_TOUCHES]; + + unsigned int first_mp:1; + unsigned int is_mp:1; + + unsigned int left:1; + unsigned int right:1; + unsigned int middle:1; + + unsigned int ts_left:1; + unsigned int ts_right:1; + unsigned int ts_middle:1; +}; + +/** + * struct alps_data - private data structure for the ALPS driver + * @psmouse: Pointer to parent psmouse device + * @dev2: Trackstick device (can be NULL). + * @dev3: Generic PS/2 mouse (can be NULL, delayed registering). + * @phys2: Physical path for the trackstick device. + * @phys3: Physical path for the generic PS/2 mouse. + * @dev3_register_work: A work instance for registering PS/2 mouse. + * @nibble_commands: Command mapping used for touchpad register accesses. + * @addr_command: Command used to tell the touchpad that a register address + * follows. + * @proto_version: Indicates V1/V2/V3/... + * @byte0: Helps figure out whether a position report packet matches the + * known format for this model. The first byte of the report, ANDed with + * mask0, should match byte0. + * @mask0: The mask used to check the first byte of the report. + * @fw_ver: cached copy of firmware version (EC report) + * @flags: Additional device capabilities (passthrough port, trackstick, etc.). + * @x_max: Largest possible X position value. + * @y_max: Largest possible Y position value. + * @x_bits: Number of X bits in the MT bitmap. + * @y_bits: Number of Y bits in the MT bitmap. + * @hw_init: Protocol-specific hardware init function. + * @process_packet: Protocol-specific function to process a report packet. + * @decode_fields: Protocol-specific function to read packet bitfields. + * @set_abs_params: Protocol-specific function to configure the input_dev. + * @prev_fin: Finger bit from previous packet. + * @multi_packet: Multi-packet data in progress. + * @multi_data: Saved multi-packet data. + * @f: Decoded packet data fields. + * @quirks: Bitmap of ALPS_QUIRK_*. + * @timer: Timer for flushing out the final report packet in the stream. + */ +struct alps_data { + struct psmouse *psmouse; + struct input_dev *dev2; + struct input_dev *dev3; + char phys2[32]; + char phys3[32]; + struct work_struct dev3_register_work; + + /* these are autodetected when the device is identified */ + const struct alps_nibble_commands *nibble_commands; + int addr_command; + u16 proto_version; + u8 byte0, mask0; + u8 dev_id[3]; + u8 fw_ver[3]; + int flags; + int x_max; + int y_max; + int x_bits; + int y_bits; + unsigned int x_res; + unsigned int y_res; + + int (*hw_init)(struct psmouse *psmouse); + void (*process_packet)(struct psmouse *psmouse); + int (*decode_fields)(struct alps_fields *f, unsigned char *p, + struct psmouse *psmouse); + void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1); + + int prev_fin; + int multi_packet; + int second_touch; + unsigned char multi_data[6]; + struct alps_fields f; + u8 quirks; + struct timer_list timer; +}; + +#define ALPS_QUIRK_TRACKSTICK_BUTTONS 1 /* trakcstick buttons in trackstick packet */ + +int alps_detect(struct psmouse *psmouse, bool set_properties); +int alps_init(struct psmouse *psmouse); + +#endif -- cgit v1.3.1