| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ronald Tschalär | 8253 | 99.39% | 4 | 44.44% |
| Sergiu Cuciurean | 44 | 0.53% | 1 | 11.11% |
| Gustavo A. R. Silva | 5 | 0.06% | 2 | 22.22% |
| Nik Nyby | 1 | 0.01% | 1 | 11.11% |
| Lee Jones | 1 | 0.01% | 1 | 11.11% |
| Total | 8304 | 9 |
// SPDX-License-Identifier: GPL-2.0 /* * MacBook (Pro) SPI keyboard and touchpad driver * * Copyright (c) 2015-2018 Federico Lorenzi * Copyright (c) 2017-2018 Ronald Tschalär */ /* * The keyboard and touchpad controller on the MacBookAir6, MacBookPro12, * MacBook8 and newer can be driven either by USB or SPI. However the USB * pins are only connected on the MacBookAir6 and 7 and the MacBookPro12. * All others need this driver. The interface is selected using ACPI methods: * * * UIEN ("USB Interface Enable"): If invoked with argument 1, disables SPI * and enables USB. If invoked with argument 0, disables USB. * * UIST ("USB Interface Status"): Returns 1 if USB is enabled, 0 otherwise. * * SIEN ("SPI Interface Enable"): If invoked with argument 1, disables USB * and enables SPI. If invoked with argument 0, disables SPI. * * SIST ("SPI Interface Status"): Returns 1 if SPI is enabled, 0 otherwise. * * ISOL: Resets the four GPIO pins used for SPI. Intended to be invoked with * argument 1, then once more with argument 0. * * UIEN and UIST are only provided on models where the USB pins are connected. * * SPI-based Protocol * ------------------ * * The device and driver exchange messages (struct message); each message is * encapsulated in one or more packets (struct spi_packet). There are two types * of exchanges: reads, and writes. A read is signaled by a GPE, upon which one * message can be read from the device. A write exchange consists of writing a * command message, immediately reading a short status packet, and then, upon * receiving a GPE, reading the response message. Write exchanges cannot be * interleaved, i.e. a new write exchange must not be started till the previous * write exchange is complete. Whether a received message is part of a read or * write exchange is indicated in the encapsulating packet's flags field. * * A single message may be too large to fit in a single packet (which has a * fixed, 256-byte size). In that case it will be split over multiple, * consecutive packets. */ #include <linux/acpi.h> #include <linux/crc16.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/efi.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/ktime.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/spinlock.h> #include <linux/spi/spi.h> #include <linux/wait.h> #include <linux/workqueue.h> #include <asm/barrier.h> #include <asm/unaligned.h> #define CREATE_TRACE_POINTS #include "applespi.h" #include "applespi_trace.h" #define APPLESPI_PACKET_SIZE 256 #define APPLESPI_STATUS_SIZE 4 #define PACKET_TYPE_READ 0x20 #define PACKET_TYPE_WRITE 0x40 #define PACKET_DEV_KEYB 0x01 #define PACKET_DEV_TPAD 0x02 #define PACKET_DEV_INFO 0xd0 #define MAX_ROLLOVER 6 #define MAX_FINGERS 11 #define MAX_FINGER_ORIENTATION 16384 #define MAX_PKTS_PER_MSG 2 #define KBD_BL_LEVEL_MIN 32U #define KBD_BL_LEVEL_MAX 255U #define KBD_BL_LEVEL_SCALE 1000000U #define KBD_BL_LEVEL_ADJ \ ((KBD_BL_LEVEL_MAX - KBD_BL_LEVEL_MIN) * KBD_BL_LEVEL_SCALE / 255U) #define EFI_BL_LEVEL_NAME L"KeyboardBacklightLevel" #define EFI_BL_LEVEL_GUID EFI_GUID(0xa076d2af, 0x9678, 0x4386, 0x8b, 0x58, 0x1f, 0xc8, 0xef, 0x04, 0x16, 0x19) #define APPLE_FLAG_FKEY 0x01 #define SPI_RW_CHG_DELAY_US 100 /* from experimentation, in µs */ #define SYNAPTICS_VENDOR_ID 0x06cb static unsigned int fnmode = 1; module_param(fnmode, uint, 0644); MODULE_PARM_DESC(fnmode, "Mode of Fn key on Apple keyboards (0 = disabled, [1] = fkeyslast, 2 = fkeysfirst)"); static unsigned int fnremap; module_param(fnremap, uint, 0644); MODULE_PARM_DESC(fnremap, "Remap Fn key ([0] = no-remap; 1 = left-ctrl, 2 = left-shift, 3 = left-alt, 4 = left-meta, 6 = right-shift, 7 = right-alt, 8 = right-meta)"); static bool iso_layout; module_param(iso_layout, bool, 0644); MODULE_PARM_DESC(iso_layout, "Enable/Disable hardcoded ISO-layout of the keyboard. ([0] = disabled, 1 = enabled)"); static char touchpad_dimensions[40]; module_param_string(touchpad_dimensions, touchpad_dimensions, sizeof(touchpad_dimensions), 0444); MODULE_PARM_DESC(touchpad_dimensions, "The pixel dimensions of the touchpad, as XxY+W+H ."); /** * struct keyboard_protocol - keyboard message. * message.type = 0x0110, message.length = 0x000a * * @unknown1: unknown * @modifiers: bit-set of modifier/control keys pressed * @unknown2: unknown * @keys_pressed: the (non-modifier) keys currently pressed * @fn_pressed: whether the fn key is currently pressed * @crc16: crc over the whole message struct (message header + * this struct) minus this @crc16 field */ struct keyboard_protocol { u8 unknown1; u8 modifiers; u8 unknown2; u8 keys_pressed[MAX_ROLLOVER]; u8 fn_pressed; __le16 crc16; }; /** * struct tp_finger - single trackpad finger structure, le16-aligned * * @origin: zero when switching track finger * @abs_x: absolute x coordinate * @abs_y: absolute y coordinate * @rel_x: relative x coordinate * @rel_y: relative y coordinate * @tool_major: tool area, major axis * @tool_minor: tool area, minor axis * @orientation: 16384 when point, else 15 bit angle * @touch_major: touch area, major axis * @touch_minor: touch area, minor axis * @unused: zeros * @pressure: pressure on forcetouch touchpad * @multi: one finger: varies, more fingers: constant * @crc16: on last finger: crc over the whole message struct * (i.e. message header + this struct) minus the last * @crc16 field; unknown on all other fingers. */ struct tp_finger { __le16 origin; __le16 abs_x; __le16 abs_y; __le16 rel_x; __le16 rel_y; __le16 tool_major; __le16 tool_minor; __le16 orientation; __le16 touch_major; __le16 touch_minor; __le16 unused[2]; __le16 pressure; __le16 multi; __le16 crc16; }; /** * struct touchpad_protocol - touchpad message. * message.type = 0x0210 * * @unknown1: unknown * @clicked: 1 if a button-click was detected, 0 otherwise * @unknown2: unknown * @number_of_fingers: the number of fingers being reported in @fingers * @clicked2: same as @clicked * @unknown3: unknown * @fingers: the data for each finger */ struct touchpad_protocol { u8 unknown1[1]; u8 clicked; u8 unknown2[28]; u8 number_of_fingers; u8 clicked2; u8 unknown3[16]; struct tp_finger fingers[]; }; /** * struct command_protocol_tp_info - get touchpad info. * message.type = 0x1020, message.length = 0x0000 * * @crc16: crc over the whole message struct (message header + * this struct) minus this @crc16 field */ struct command_protocol_tp_info { __le16 crc16; }; /** * struct touchpad_info - touchpad info response. * message.type = 0x1020, message.length = 0x006e * * @unknown1: unknown * @model_flags: flags (vary by model number, but significance otherwise * unknown) * @model_no: the touchpad model number * @unknown2: unknown * @crc16: crc over the whole message struct (message header + * this struct) minus this @crc16 field */ struct touchpad_info_protocol { u8 unknown1[105]; u8 model_flags; u8 model_no; u8 unknown2[3]; __le16 crc16; }; /** * struct command_protocol_mt_init - initialize multitouch. * message.type = 0x0252, message.length = 0x0002 * * @cmd: value: 0x0102 * @crc16: crc over the whole message struct (message header + * this struct) minus this @crc16 field */ struct command_protocol_mt_init { __le16 cmd; __le16 crc16; }; /** * struct command_protocol_capsl - toggle caps-lock led * message.type = 0x0151, message.length = 0x0002 * * @unknown: value: 0x01 (length?) * @led: 0 off, 2 on * @crc16: crc over the whole message struct (message header + * this struct) minus this @crc16 field */ struct command_protocol_capsl { u8 unknown; u8 led; __le16 crc16; }; /** * struct command_protocol_bl - set keyboard backlight brightness * message.type = 0xB051, message.length = 0x0006 * * @const1: value: 0x01B0 * @level: the brightness level to set * @const2: value: 0x0001 (backlight off), 0x01F4 (backlight on) * @crc16: crc over the whole message struct (message header + * this struct) minus this @crc16 field */ struct command_protocol_bl { __le16 const1; __le16 level; __le16 const2; __le16 crc16; }; /** * struct message - a complete spi message. * * Each message begins with fixed header, followed by a message-type specific * payload, and ends with a 16-bit crc. Because of the varying lengths of the * payload, the crc is defined at the end of each payload struct, rather than * in this struct. * * @type: the message type * @zero: always 0 * @counter: incremented on each message, rolls over after 255; there is a * separate counter for each message type. * @rsp_buf_len:response buffer length (the exact nature of this field is quite * speculative). On a request/write this is often the same as * @length, though in some cases it has been seen to be much larger * (e.g. 0x400); on a response/read this the same as on the * request; for reads that are not responses it is 0. * @length: length of the remainder of the data in the whole message * structure (after re-assembly in case of being split over * multiple spi-packets), minus the trailing crc. The total size * of the message struct is therefore @length + 10. * * @keyboard: Keyboard message * @touchpad: Touchpad message * @tp_info: Touchpad info (response) * @tp_info_command: Touchpad info (CRC) * @init_mt_command: Initialise Multitouch * @capsl_command: Toggle caps-lock LED * @bl_command: Keyboard brightness * @data: Buffer data */ struct message { __le16 type; u8 zero; u8 counter; __le16 rsp_buf_len; __le16 length; union { struct keyboard_protocol keyboard; struct touchpad_protocol touchpad; struct touchpad_info_protocol tp_info; struct command_protocol_tp_info tp_info_command; struct command_protocol_mt_init init_mt_command; struct command_protocol_capsl capsl_command; struct command_protocol_bl bl_command; u8 data[0]; }; }; /* type + zero + counter + rsp_buf_len + length */ #define MSG_HEADER_SIZE 8 /** * struct spi_packet - a complete spi packet; always 256 bytes. This carries * the (parts of the) message in the data. But note that this does not * necessarily contain a complete message, as in some cases (e.g. many * fingers pressed) the message is split over multiple packets (see the * @offset, @remaining, and @length fields). In general the data parts in * spi_packet's are concatenated until @remaining is 0, and the result is an * message. * * @flags: 0x40 = write (to device), 0x20 = read (from device); note that * the response to a write still has 0x40. * @device: 1 = keyboard, 2 = touchpad * @offset: specifies the offset of this packet's data in the complete * message; i.e. > 0 indicates this is a continuation packet (in * the second packet for a message split over multiple packets * this would then be the same as the @length in the first packet) * @remaining: number of message bytes remaining in subsequents packets (in * the first packet of a message split over two packets this would * then be the same as the @length in the second packet) * @length: length of the valid data in the @data in this packet * @data: all or part of a message * @crc16: crc over this whole structure minus this @crc16 field. This * covers just this packet, even on multi-packet messages (in * contrast to the crc in the message). */ struct spi_packet { u8 flags; u8 device; __le16 offset; __le16 remaining; __le16 length; u8 data[246]; __le16 crc16; }; struct spi_settings { u64 spi_cs_delay; /* cs-to-clk delay in us */ u64 reset_a2r_usec; /* active-to-receive delay? */ u64 reset_rec_usec; /* ? (cur val: 10) */ }; /* this mimics struct drm_rect */ struct applespi_tp_info { int x_min; int y_min; int x_max; int y_max; }; struct applespi_data { struct spi_device *spi; struct spi_settings spi_settings; struct input_dev *keyboard_input_dev; struct input_dev *touchpad_input_dev; u8 *tx_buffer; u8 *tx_status; u8 *rx_buffer; u8 *msg_buf; unsigned int saved_msg_len; struct applespi_tp_info tp_info; u8 last_keys_pressed[MAX_ROLLOVER]; u8 last_keys_fn_pressed[MAX_ROLLOVER]; u8 last_fn_pressed; struct input_mt_pos pos[MAX_FINGERS]; int slots[MAX_FINGERS]; int gpe; acpi_handle sien; acpi_handle sist; struct spi_transfer dl_t; struct spi_transfer rd_t; struct spi_message rd_m; struct spi_transfer ww_t; struct spi_transfer wd_t; struct spi_transfer wr_t; struct spi_transfer st_t; struct spi_message wr_m; bool want_tp_info_cmd; bool want_mt_init_cmd; bool want_cl_led_on; bool have_cl_led_on; unsigned int want_bl_level; unsigned int have_bl_level; unsigned int cmd_msg_cntr; /* lock to protect the above parameters and flags below */ spinlock_t cmd_msg_lock; ktime_t cmd_msg_queued; enum applespi_evt_type cmd_evt_type; struct led_classdev backlight_info; bool suspended; bool drain; wait_queue_head_t drain_complete; bool read_active; bool write_active; struct work_struct work; struct touchpad_info_protocol rcvd_tp_info; struct dentry *debugfs_root; bool debug_tp_dim; char tp_dim_val[40]; int tp_dim_min_x; int tp_dim_max_x; int tp_dim_min_y; int tp_dim_max_y; }; static const unsigned char applespi_scancodes[] = { 0, 0, 0, 0, KEY_A, KEY_B, KEY_C, KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J, KEY_K, KEY_L, KEY_M, KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, KEY_S, KEY_T, KEY_U, KEY_V, KEY_W, KEY_X, KEY_Y, KEY_Z, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, KEY_0, KEY_ENTER, KEY_ESC, KEY_BACKSPACE, KEY_TAB, KEY_SPACE, KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_SEMICOLON, KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA, KEY_DOT, KEY_SLASH, KEY_CAPSLOCK, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RIGHT, KEY_LEFT, KEY_DOWN, KEY_UP, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_102ND, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RO, 0, KEY_YEN, 0, 0, 0, 0, 0, 0, KEY_KATAKANAHIRAGANA, KEY_MUHENKAN }; /* * This must have exactly as many entries as there are bits in * struct keyboard_protocol.modifiers . */ static const unsigned char applespi_controlcodes[] = { KEY_LEFTCTRL, KEY_LEFTSHIFT, KEY_LEFTALT, KEY_LEFTMETA, 0, KEY_RIGHTSHIFT, KEY_RIGHTALT, KEY_RIGHTMETA }; struct applespi_key_translation { u16 from; u16 to; u8 flags; }; static const struct applespi_key_translation applespi_fn_codes[] = { { KEY_BACKSPACE, KEY_DELETE }, { KEY_ENTER, KEY_INSERT }, { KEY_F1, KEY_BRIGHTNESSDOWN, APPLE_FLAG_FKEY }, { KEY_F2, KEY_BRIGHTNESSUP, APPLE_FLAG_FKEY }, { KEY_F3, KEY_SCALE, APPLE_FLAG_FKEY }, { KEY_F4, KEY_DASHBOARD, APPLE_FLAG_FKEY }, { KEY_F5, KEY_KBDILLUMDOWN, APPLE_FLAG_FKEY }, { KEY_F6, KEY_KBDILLUMUP, APPLE_FLAG_FKEY }, { KEY_F7, KEY_PREVIOUSSONG, APPLE_FLAG_FKEY }, { KEY_F8, KEY_PLAYPAUSE, APPLE_FLAG_FKEY }, { KEY_F9, KEY_NEXTSONG, APPLE_FLAG_FKEY }, { KEY_F10, KEY_MUTE, APPLE_FLAG_FKEY }, { KEY_F11, KEY_VOLUMEDOWN, APPLE_FLAG_FKEY }, { KEY_F12, KEY_VOLUMEUP, APPLE_FLAG_FKEY }, { KEY_RIGHT, KEY_END }, { KEY_LEFT, KEY_HOME }, { KEY_DOWN, KEY_PAGEDOWN }, { KEY_UP, KEY_PAGEUP }, { } }; static const struct applespi_key_translation apple_iso_keyboard[] = { { KEY_GRAVE, KEY_102ND }, { KEY_102ND, KEY_GRAVE }, { } }; struct applespi_tp_model_info { u16 model; struct applespi_tp_info tp_info; }; static const struct applespi_tp_model_info applespi_tp_models[] = { { .model = 0x04, /* MB8 MB9 MB10 */ .tp_info = { -5087, -182, 5579, 6089 }, }, { .model = 0x05, /* MBP13,1 MBP13,2 MBP14,1 MBP14,2 */ .tp_info = { -6243, -170, 6749, 7685 }, }, { .model = 0x06, /* MBP13,3 MBP14,3 */ .tp_info = { -7456, -163, 7976, 9283 }, }, {} }; typedef void (*applespi_trace_fun)(enum applespi_evt_type, enum applespi_pkt_type, u8 *, size_t); static applespi_trace_fun applespi_get_trace_fun(enum applespi_evt_type type) { switch (type) { case ET_CMD_TP_INI: return trace_applespi_tp_ini_cmd; case ET_CMD_BL: return trace_applespi_backlight_cmd; case ET_CMD_CL: return trace_applespi_caps_lock_cmd; case ET_RD_KEYB: return trace_applespi_keyboard_data; case ET_RD_TPAD: return trace_applespi_touchpad_data; case ET_RD_UNKN: return trace_applespi_unknown_data; default: WARN_ONCE(1, "Unknown msg type %d", type); return trace_applespi_unknown_data; } } static void applespi_setup_read_txfrs(struct applespi_data *applespi) { struct spi_message *msg = &applespi->rd_m; struct spi_transfer *dl_t = &applespi->dl_t; struct spi_transfer *rd_t = &applespi->rd_t; memset(dl_t, 0, sizeof(*dl_t)); memset(rd_t, 0, sizeof(*rd_t)); dl_t->delay.value = applespi->spi_settings.spi_cs_delay; dl_t->delay.unit = SPI_DELAY_UNIT_USECS; rd_t->rx_buf = applespi->rx_buffer; rd_t->len = APPLESPI_PACKET_SIZE; spi_message_init(msg); spi_message_add_tail(dl_t, msg); spi_message_add_tail(rd_t, msg); } static void applespi_setup_write_txfrs(struct applespi_data *applespi) { struct spi_message *msg = &applespi->wr_m; struct spi_transfer *wt_t = &applespi->ww_t; struct spi_transfer *dl_t = &applespi->wd_t; struct spi_transfer *wr_t = &applespi->wr_t; struct spi_transfer *st_t = &applespi->st_t; memset(wt_t, 0, sizeof(*wt_t)); memset(dl_t, 0, sizeof(*dl_t)); memset(wr_t, 0, sizeof(*wr_t)); memset(st_t, 0, sizeof(*st_t)); /* * All we need here is a delay at the beginning of the message before * asserting cs. But the current spi API doesn't support this, so we * end up with an extra unnecessary (but harmless) cs assertion and * deassertion. */ wt_t->delay.value = SPI_RW_CHG_DELAY_US; wt_t->delay.unit = SPI_DELAY_UNIT_USECS; wt_t->cs_change = 1; dl_t->delay.value = applespi->spi_settings.spi_cs_delay; dl_t->delay.unit = SPI_DELAY_UNIT_USECS; wr_t->tx_buf = applespi->tx_buffer; wr_t->len = APPLESPI_PACKET_SIZE; wr_t->delay.value = SPI_RW_CHG_DELAY_US; wr_t->delay.unit = SPI_DELAY_UNIT_USECS; st_t->rx_buf = applespi->tx_status; st_t->len = APPLESPI_STATUS_SIZE; spi_message_init(msg); spi_message_add_tail(wt_t, msg); spi_message_add_tail(dl_t, msg); spi_message_add_tail(wr_t, msg); spi_message_add_tail(st_t, msg); } static int applespi_async(struct applespi_data *applespi, struct spi_message *message, void (*complete)(void *)) { message->complete = complete; message->context = applespi; return spi_async(applespi->spi, message); } static inline bool applespi_check_write_status(struct applespi_data *applespi, int sts) { static u8 status_ok[] = { 0xac, 0x27, 0x68, 0xd5 }; if (sts < 0) { dev_warn(&applespi->spi->dev, "Error writing to device: %d\n", sts); return false; } if (memcmp(applespi->tx_status, status_ok, APPLESPI_STATUS_SIZE)) { dev_warn(&applespi->spi->dev, "Error writing to device: %*ph\n", APPLESPI_STATUS_SIZE, applespi->tx_status); return false; } return true; } static int applespi_get_spi_settings(struct applespi_data *applespi) { struct acpi_device *adev = ACPI_COMPANION(&applespi->spi->dev); const union acpi_object *o; struct spi_settings *settings = &applespi->spi_settings; if (!acpi_dev_get_property(adev, "spiCSDelay", ACPI_TYPE_BUFFER, &o)) settings->spi_cs_delay = *(u64 *)o->buffer.pointer; else dev_warn(&applespi->spi->dev, "Property spiCSDelay not found\n"); if (!acpi_dev_get_property(adev, "resetA2RUsec", ACPI_TYPE_BUFFER, &o)) settings->reset_a2r_usec = *(u64 *)o->buffer.pointer; else dev_warn(&applespi->spi->dev, "Property resetA2RUsec not found\n"); if (!acpi_dev_get_property(adev, "resetRecUsec", ACPI_TYPE_BUFFER, &o)) settings->reset_rec_usec = *(u64 *)o->buffer.pointer; else dev_warn(&applespi->spi->dev, "Property resetRecUsec not found\n"); dev_dbg(&applespi->spi->dev, "SPI settings: spi_cs_delay=%llu reset_a2r_usec=%llu reset_rec_usec=%llu\n", settings->spi_cs_delay, settings->reset_a2r_usec, settings->reset_rec_usec); return 0; } static int applespi_setup_spi(struct applespi_data *applespi) { int sts; sts = applespi_get_spi_settings(applespi); if (sts) return sts; spin_lock_init(&applespi->cmd_msg_lock); init_waitqueue_head(&applespi->drain_complete); return 0; } static int applespi_enable_spi(struct applespi_data *applespi) { acpi_status acpi_sts; unsigned long long spi_status; /* check if SPI is already enabled, so we can skip the delay below */ acpi_sts = acpi_evaluate_integer(applespi->sist, NULL, NULL, &spi_status); if (ACPI_SUCCESS(acpi_sts) && spi_status) return 0; /* SIEN(1) will enable SPI communication */ acpi_sts = acpi_execute_simple_method(applespi->sien, NULL, 1); if (ACPI_FAILURE(acpi_sts)) { dev_err(&applespi->spi->dev, "SIEN failed: %s\n", acpi_format_exception(acpi_sts)); return -ENODEV; } /* * Allow the SPI interface to come up before returning. Without this * delay, the SPI commands to enable multitouch mode may not reach * the trackpad controller, causing pointer movement to break upon * resume from sleep. */ msleep(50); return 0; } static int applespi_send_cmd_msg(struct applespi_data *applespi); static void applespi_msg_complete(struct applespi_data *applespi, bool is_write_msg, bool is_read_compl) { unsigned long flags; spin_lock_irqsave(&applespi->cmd_msg_lock, flags); if (is_read_compl) applespi->read_active = false; if (is_write_msg) applespi->write_active = false; if (applespi->drain && !applespi->write_active) wake_up_all(&applespi->drain_complete); if (is_write_msg) { applespi->cmd_msg_queued = 0; applespi_send_cmd_msg(applespi); } spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); } static void applespi_async_write_complete(void *context) { struct applespi_data *applespi = context; enum applespi_evt_type evt_type = applespi->cmd_evt_type; applespi_get_trace_fun(evt_type)(evt_type, PT_WRITE, applespi->tx_buffer, APPLESPI_PACKET_SIZE); applespi_get_trace_fun(evt_type)(evt_type, PT_STATUS, applespi->tx_status, APPLESPI_STATUS_SIZE); udelay(SPI_RW_CHG_DELAY_US); if (!applespi_check_write_status(applespi, applespi->wr_m.status)) { /* * If we got an error, we presumably won't get the expected * response message either. */ applespi_msg_complete(applespi, true, false); } } static int applespi_send_cmd_msg(struct applespi_data *applespi) { u16 crc; int sts; struct spi_packet *packet = (struct spi_packet *)applespi->tx_buffer; struct message *message = (struct message *)packet->data; u16 msg_len; u8 device; /* check if draining */ if (applespi->drain) return 0; /* check whether send is in progress */ if (applespi->cmd_msg_queued) { if (ktime_ms_delta(ktime_get(), applespi->cmd_msg_queued) < 1000) return 0; dev_warn(&applespi->spi->dev, "Command %d timed out\n", applespi->cmd_evt_type); applespi->cmd_msg_queued = 0; applespi->write_active = false; } /* set up packet */ memset(packet, 0, APPLESPI_PACKET_SIZE); /* are we processing init commands? */ if (applespi->want_tp_info_cmd) { applespi->want_tp_info_cmd = false; applespi->want_mt_init_cmd = true; applespi->cmd_evt_type = ET_CMD_TP_INI; /* build init command */ device = PACKET_DEV_INFO; message->type = cpu_to_le16(0x1020); msg_len = sizeof(message->tp_info_command); message->zero = 0x02; message->rsp_buf_len = cpu_to_le16(0x0200); } else if (applespi->want_mt_init_cmd) { applespi->want_mt_init_cmd = false; applespi->cmd_evt_type = ET_CMD_TP_INI; /* build init command */ device = PACKET_DEV_TPAD; message->type = cpu_to_le16(0x0252); msg_len = sizeof(message->init_mt_command); message->init_mt_command.cmd = cpu_to_le16(0x0102); /* do we need caps-lock command? */ } else if (applespi->want_cl_led_on != applespi->have_cl_led_on) { applespi->have_cl_led_on = applespi->want_cl_led_on; applespi->cmd_evt_type = ET_CMD_CL; /* build led command */ device = PACKET_DEV_KEYB; message->type = cpu_to_le16(0x0151); msg_len = sizeof(message->capsl_command); message->capsl_command.unknown = 0x01; message->capsl_command.led = applespi->have_cl_led_on ? 2 : 0; /* do we need backlight command? */ } else if (applespi->want_bl_level != applespi->have_bl_level) { applespi->have_bl_level = applespi->want_bl_level; applespi->cmd_evt_type = ET_CMD_BL; /* build command buffer */ device = PACKET_DEV_KEYB; message->type = cpu_to_le16(0xB051); msg_len = sizeof(message->bl_command); message->bl_command.const1 = cpu_to_le16(0x01B0); message->bl_command.level = cpu_to_le16(applespi->have_bl_level); if (applespi->have_bl_level > 0) message->bl_command.const2 = cpu_to_le16(0x01F4); else message->bl_command.const2 = cpu_to_le16(0x0001); /* everything's up-to-date */ } else { return 0; } /* finalize packet */ packet->flags = PACKET_TYPE_WRITE; packet->device = device; packet->length = cpu_to_le16(MSG_HEADER_SIZE + msg_len); message->counter = applespi->cmd_msg_cntr++ % (U8_MAX + 1); message->length = cpu_to_le16(msg_len - 2); if (!message->rsp_buf_len) message->rsp_buf_len = message->length; crc = crc16(0, (u8 *)message, le16_to_cpu(packet->length) - 2); put_unaligned_le16(crc, &message->data[msg_len - 2]); crc = crc16(0, (u8 *)packet, sizeof(*packet) - 2); packet->crc16 = cpu_to_le16(crc); /* send command */ sts = applespi_async(applespi, &applespi->wr_m, applespi_async_write_complete); if (sts) { dev_warn(&applespi->spi->dev, "Error queueing async write to device: %d\n", sts); return sts; } applespi->cmd_msg_queued = ktime_get_coarse(); applespi->write_active = true; return 0; } static void applespi_init(struct applespi_data *applespi, bool is_resume) { unsigned long flags; spin_lock_irqsave(&applespi->cmd_msg_lock, flags); if (is_resume) applespi->want_mt_init_cmd = true; else applespi->want_tp_info_cmd = true; applespi_send_cmd_msg(applespi); spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); } static int applespi_set_capsl_led(struct applespi_data *applespi, bool capslock_on) { unsigned long flags; int sts; spin_lock_irqsave(&applespi->cmd_msg_lock, flags); applespi->want_cl_led_on = capslock_on; sts = applespi_send_cmd_msg(applespi); spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); return sts; } static void applespi_set_bl_level(struct led_classdev *led_cdev, enum led_brightness value) { struct applespi_data *applespi = container_of(led_cdev, struct applespi_data, backlight_info); unsigned long flags; spin_lock_irqsave(&applespi->cmd_msg_lock, flags); if (value == 0) { applespi->want_bl_level = value; } else { /* * The backlight does not turn on till level 32, so we scale * the range here so that from a user's perspective it turns * on at 1. */ applespi->want_bl_level = ((value * KBD_BL_LEVEL_ADJ) / KBD_BL_LEVEL_SCALE + KBD_BL_LEVEL_MIN); } applespi_send_cmd_msg(applespi); spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); } static int applespi_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { struct applespi_data *applespi = input_get_drvdata(dev); switch (type) { case EV_LED: applespi_set_capsl_led(applespi, !!test_bit(LED_CAPSL, dev->led)); return 0; } return -EINVAL; } /* lifted from the BCM5974 driver and renamed from raw2int */ /* convert 16-bit little endian to signed integer */ static inline int le16_to_int(__le16 x) { return (signed short)le16_to_cpu(x); } static void applespi_debug_update_dimensions(struct applespi_data *applespi, const struct tp_finger *f) { applespi->tp_dim_min_x = min(applespi->tp_dim_min_x, le16_to_int(f->abs_x)); applespi->tp_dim_max_x = max(applespi->tp_dim_max_x, le16_to_int(f->abs_x)); applespi->tp_dim_min_y = min(applespi->tp_dim_min_y, le16_to_int(f->abs_y)); applespi->tp_dim_max_y = max(applespi->tp_dim_max_y, le16_to_int(f->abs_y)); } static int applespi_tp_dim_open(struct inode *inode, struct file *file) { struct applespi_data *applespi = inode->i_private; file->private_data = applespi; snprintf(applespi->tp_dim_val, sizeof(applespi->tp_dim_val), "0x%.4x %dx%d+%u+%u\n", applespi->touchpad_input_dev->id.product, applespi->tp_dim_min_x, applespi->tp_dim_min_y, applespi->tp_dim_max_x - applespi->tp_dim_min_x, applespi->tp_dim_max_y - applespi->tp_dim_min_y); return nonseekable_open(inode, file); } static ssize_t applespi_tp_dim_read(struct file *file, char __user *buf, size_t len, loff_t *off) { struct applespi_data *applespi = file->private_data; return simple_read_from_buffer(buf, len, off, applespi->tp_dim_val, strlen(applespi->tp_dim_val)); } static const struct file_operations applespi_tp_dim_fops = { .owner = THIS_MODULE, .open = applespi_tp_dim_open, .read = applespi_tp_dim_read, .llseek = no_llseek, }; static void report_finger_data(struct input_dev *input, int slot, const struct input_mt_pos *pos, const struct tp_finger *f) { input_mt_slot(input, slot); input_mt_report_slot_state(input, MT_TOOL_FINGER, true); input_report_abs(input, ABS_MT_TOUCH_MAJOR, le16_to_int(f->touch_major) << 1); input_report_abs(input, ABS_MT_TOUCH_MINOR, le16_to_int(f->touch_minor) << 1); input_report_abs(input, ABS_MT_WIDTH_MAJOR, le16_to_int(f->tool_major) << 1); input_report_abs(input, ABS_MT_WIDTH_MINOR, le16_to_int(f->tool_minor) << 1); input_report_abs(input, ABS_MT_ORIENTATION, MAX_FINGER_ORIENTATION - le16_to_int(f->orientation)); input_report_abs(input, ABS_MT_POSITION_X, pos->x); input_report_abs(input, ABS_MT_POSITION_Y, pos->y); } static void report_tp_state(struct applespi_data *applespi, struct touchpad_protocol *t) { const struct tp_finger *f; struct input_dev *input; const struct applespi_tp_info *tp_info = &applespi->tp_info; int i, n; /* touchpad_input_dev is set async in worker */ input = smp_load_acquire(&applespi->touchpad_input_dev); if (!input) return; /* touchpad isn't initialized yet */ n = 0; for (i = 0; i < t->number_of_fingers; i++) { f = &t->fingers[i]; if (le16_to_int(f->touch_major) == 0) continue; applespi->pos[n].x = le16_to_int(f->abs_x); applespi->pos[n].y = tp_info->y_min + tp_info->y_max - le16_to_int(f->abs_y); n++; if (applespi->debug_tp_dim) applespi_debug_update_dimensions(applespi, f); } input_mt_assign_slots(input, applespi->slots, applespi->pos, n, 0); for (i = 0; i < n; i++) report_finger_data(input, applespi->slots[i], &applespi->pos[i], &t->fingers[i]); input_mt_sync_frame(input); input_report_key(input, BTN_LEFT, t->clicked); input_sync(input); } static const struct applespi_key_translation * applespi_find_translation(const struct applespi_key_translation *table, u16 key) { const struct applespi_key_translation *trans; for (trans = table; trans->from; trans++) if (trans->from == key) return trans; return NULL; } static unsigned int applespi_translate_fn_key(unsigned int key, int fn_pressed) { const struct applespi_key_translation *trans; int do_translate; trans = applespi_find_translation(applespi_fn_codes, key); if (trans) { if (trans->flags & APPLE_FLAG_FKEY) do_translate = (fnmode == 2 && fn_pressed) || (fnmode == 1 && !fn_pressed); else do_translate = fn_pressed; if (do_translate) key = trans->to; } return key; } static unsigned int applespi_translate_iso_layout(unsigned int key) { const struct applespi_key_translation *trans; trans = applespi_find_translation(apple_iso_keyboard, key); if (trans) key = trans->to; return key; } static unsigned int applespi_code_to_key(u8 code, int fn_pressed) { unsigned int key = applespi_scancodes[code]; if (fnmode) key = applespi_translate_fn_key(key, fn_pressed); if (iso_layout) key = applespi_translate_iso_layout(key); return key; } static void applespi_remap_fn_key(struct keyboard_protocol *keyboard_protocol) { unsigned char tmp; u8 bit = BIT((fnremap - 1) & 0x07); if (!fnremap || fnremap > ARRAY_SIZE(applespi_controlcodes) || !applespi_controlcodes[fnremap - 1]) return; tmp = keyboard_protocol->fn_pressed; keyboard_protocol->fn_pressed = !!(keyboard_protocol->modifiers & bit); if (tmp) keyboard_protocol->modifiers |= bit; else keyboard_protocol->modifiers &= ~bit; } static void applespi_handle_keyboard_event(struct applespi_data *applespi, struct keyboard_protocol *keyboard_protocol) { unsigned int key; int i; compiletime_assert(ARRAY_SIZE(applespi_controlcodes) == sizeof_field(struct keyboard_protocol, modifiers) * 8, "applespi_controlcodes has wrong number of entries"); /* check for rollover overflow, which is signalled by all keys == 1 */ if (!memchr_inv(keyboard_protocol->keys_pressed, 1, MAX_ROLLOVER)) return; /* remap fn key if desired */ applespi_remap_fn_key(keyboard_protocol); /* check released keys */ for (i = 0; i < MAX_ROLLOVER; i++) { if (memchr(keyboard_protocol->keys_pressed, applespi->last_keys_pressed[i], MAX_ROLLOVER)) continue; /* key is still pressed */ key = applespi_code_to_key(applespi->last_keys_pressed[i], applespi->last_keys_fn_pressed[i]); input_report_key(applespi->keyboard_input_dev, key, 0); applespi->last_keys_fn_pressed[i] = 0; } /* check pressed keys */ for (i = 0; i < MAX_ROLLOVER; i++) { if (keyboard_protocol->keys_pressed[i] < ARRAY_SIZE(applespi_scancodes) && keyboard_protocol->keys_pressed[i] > 0) { key = applespi_code_to_key( keyboard_protocol->keys_pressed[i], keyboard_protocol->fn_pressed); input_report_key(applespi->keyboard_input_dev, key, 1); applespi->last_keys_fn_pressed[i] = keyboard_protocol->fn_pressed; } } /* check control keys */ for (i = 0; i < ARRAY_SIZE(applespi_controlcodes); i++) { if (keyboard_protocol->modifiers & BIT(i)) input_report_key(applespi->keyboard_input_dev, applespi_controlcodes[i], 1); else input_report_key(applespi->keyboard_input_dev, applespi_controlcodes[i], 0); } /* check function key */ if (keyboard_protocol->fn_pressed && !applespi->last_fn_pressed) input_report_key(applespi->keyboard_input_dev, KEY_FN, 1); else if (!keyboard_protocol->fn_pressed && applespi->last_fn_pressed) input_report_key(applespi->keyboard_input_dev, KEY_FN, 0); applespi->last_fn_pressed = keyboard_protocol->fn_pressed; /* done */ input_sync(applespi->keyboard_input_dev); memcpy(&applespi->last_keys_pressed, keyboard_protocol->keys_pressed, sizeof(applespi->last_keys_pressed)); } static const struct applespi_tp_info *applespi_find_touchpad_info(u8 model) { const struct applespi_tp_model_info *info; for (info = applespi_tp_models; info->model; info++) { if (info->model == model) return &info->tp_info; } return NULL; } static int applespi_register_touchpad_device(struct applespi_data *applespi, struct touchpad_info_protocol *rcvd_tp_info) { const struct applespi_tp_info *tp_info; struct input_dev *touchpad_input_dev; int sts; /* set up touchpad dimensions */ tp_info = applespi_find_touchpad_info(rcvd_tp_info->model_no); if (!tp_info) { dev_warn(&applespi->spi->dev, "Unknown touchpad model %x - falling back to MB8 touchpad\n", rcvd_tp_info->model_no); tp_info = &applespi_tp_models[0].tp_info; } applespi->tp_info = *tp_info; if (touchpad_dimensions[0]) { int x, y, w, h; sts = sscanf(touchpad_dimensions, "%dx%d+%u+%u", &x, &y, &w, &h); if (sts == 4) { dev_info(&applespi->spi->dev, "Overriding touchpad dimensions from module param\n"); applespi->tp_info.x_min = x; applespi->tp_info.y_min = y; applespi->tp_info.x_max = x + w; applespi->tp_info.y_max = y + h; } else { dev_warn(&applespi->spi->dev, "Invalid touchpad dimensions '%s': must be in the form XxY+W+H\n", touchpad_dimensions); touchpad_dimensions[0] = '\0'; } } if (!touchpad_dimensions[0]) { snprintf(touchpad_dimensions, sizeof(touchpad_dimensions), "%dx%d+%u+%u", applespi->tp_info.x_min, applespi->tp_info.y_min, applespi->tp_info.x_max - applespi->tp_info.x_min, applespi->tp_info.y_max - applespi->tp_info.y_min); } /* create touchpad input device */ touchpad_input_dev = devm_input_allocate_device(&applespi->spi->dev); if (!touchpad_input_dev) { dev_err(&applespi->spi->dev, "Failed to allocate touchpad input device\n"); return -ENOMEM; } touchpad_input_dev->name = "Apple SPI Touchpad"; touchpad_input_dev->phys = "applespi/input1"; touchpad_input_dev->dev.parent = &applespi->spi->dev; touchpad_input_dev->id.bustype = BUS_SPI; touchpad_input_dev->id.vendor = SYNAPTICS_VENDOR_ID; touchpad_input_dev->id.product = rcvd_tp_info->model_no << 8 | rcvd_tp_info->model_flags; /* basic properties */ input_set_capability(touchpad_input_dev, EV_REL, REL_X); input_set_capability(touchpad_input_dev, EV_REL, REL_Y); __set_bit(INPUT_PROP_POINTER, touchpad_input_dev->propbit); __set_bit(INPUT_PROP_BUTTONPAD, touchpad_input_dev->propbit); /* finger touch area */ input_set_abs_params(touchpad_input_dev, ABS_MT_TOUCH_MAJOR, 0, 5000, 0, 0); input_set_abs_params(touchpad_input_dev, ABS_MT_TOUCH_MINOR, 0, 5000, 0, 0); /* finger approach area */ input_set_abs_params(touchpad_input_dev, ABS_MT_WIDTH_MAJOR, 0, 5000, 0, 0); input_set_abs_params(touchpad_input_dev, ABS_MT_WIDTH_MINOR, 0, 5000, 0, 0); /* finger orientation */ input_set_abs_params(touchpad_input_dev, ABS_MT_ORIENTATION, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0, 0); /* finger position */ input_set_abs_params(touchpad_input_dev, ABS_MT_POSITION_X, applespi->tp_info.x_min, applespi->tp_info.x_max, 0, 0); input_set_abs_params(touchpad_input_dev, ABS_MT_POSITION_Y, applespi->tp_info.y_min, applespi->tp_info.y_max, 0, 0); /* touchpad button */ input_set_capability(touchpad_input_dev, EV_KEY, BTN_LEFT); /* multitouch */ sts = input_mt_init_slots(touchpad_input_dev, MAX_FINGERS, INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK); if (sts) { dev_err(&applespi->spi->dev, "failed to initialize slots: %d", sts); return sts; } /* register input device */ sts = input_register_device(touchpad_input_dev); if (sts) { dev_err(&applespi->spi->dev, "Unable to register touchpad input device (%d)\n", sts); return sts; } /* touchpad_input_dev is read async in spi callback */ smp_store_release(&applespi->touchpad_input_dev, touchpad_input_dev); return 0; } static void applespi_worker(struct work_struct *work) { struct applespi_data *applespi = container_of(work, struct applespi_data, work); applespi_register_touchpad_device(applespi, &applespi->rcvd_tp_info); } static void applespi_handle_cmd_response(struct applespi_data *applespi, struct spi_packet *packet, struct message *message) { if (packet->device == PACKET_DEV_INFO && le16_to_cpu(message->type) == 0x1020) { /* * We're not allowed to sleep here, but registering an input * device can sleep. */ applespi->rcvd_tp_info = message->tp_info; schedule_work(&applespi->work); return; } if (le16_to_cpu(message->length) != 0x0000) { dev_warn_ratelimited(&applespi->spi->dev, "Received unexpected write response: length=%x\n", le16_to_cpu(message->length)); return; } if (packet->device == PACKET_DEV_TPAD && le16_to_cpu(message->type) == 0x0252 && le16_to_cpu(message->rsp_buf_len) == 0x0002) dev_info(&applespi->spi->dev, "modeswitch done.\n"); } static bool applespi_verify_crc(struct applespi_data *applespi, u8 *buffer, size_t buflen) { u16 crc; crc = crc16(0, buffer, buflen); if (crc) { dev_warn_ratelimited(&applespi->spi->dev, "Received corrupted packet (crc mismatch)\n"); trace_applespi_bad_crc(ET_RD_CRC, READ, buffer, buflen); return false; } return true; } static void applespi_debug_print_read_packet(struct applespi_data *applespi, struct spi_packet *packet) { unsigned int evt_type; if (packet->flags == PACKET_TYPE_READ && packet->device == PACKET_DEV_KEYB) evt_type = ET_RD_KEYB; else if (packet->flags == PACKET_TYPE_READ && packet->device == PACKET_DEV_TPAD) evt_type = ET_RD_TPAD; else if (packet->flags == PACKET_TYPE_WRITE) evt_type = applespi->cmd_evt_type; else evt_type = ET_RD_UNKN; applespi_get_trace_fun(evt_type)(evt_type, PT_READ, applespi->rx_buffer, APPLESPI_PACKET_SIZE); } static void applespi_got_data(struct applespi_data *applespi) { struct spi_packet *packet; struct message *message; unsigned int msg_len; unsigned int off; unsigned int rem; unsigned int len; /* process packet header */ if (!applespi_verify_crc(applespi, applespi->rx_buffer, APPLESPI_PACKET_SIZE)) { unsigned long flags; spin_lock_irqsave(&applespi->cmd_msg_lock, flags); if (applespi->drain) { applespi->read_active = false; applespi->write_active = false; wake_up_all(&applespi->drain_complete); } spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); return; } packet = (struct spi_packet *)applespi->rx_buffer; applespi_debug_print_read_packet(applespi, packet); off = le16_to_cpu(packet->offset); rem = le16_to_cpu(packet->remaining); len = le16_to_cpu(packet->length); if (len > sizeof(packet->data)) { dev_warn_ratelimited(&applespi->spi->dev, "Received corrupted packet (invalid packet length %u)\n", len); goto msg_complete; } /* handle multi-packet messages */ if (rem > 0 || off > 0) { if (off != applespi->saved_msg_len) { dev_warn_ratelimited(&applespi->spi->dev, "Received unexpected offset (got %u, expected %u)\n", off, applespi->saved_msg_len); goto msg_complete; } if (off + rem > MAX_PKTS_PER_MSG * APPLESPI_PACKET_SIZE) { dev_warn_ratelimited(&applespi->spi->dev, "Received message too large (size %u)\n", off + rem); goto msg_complete; } if (off + len > MAX_PKTS_PER_MSG * APPLESPI_PACKET_SIZE) { dev_warn_ratelimited(&applespi->spi->dev, "Received message too large (size %u)\n", off + len); goto msg_complete; } memcpy(applespi->msg_buf + off, &packet->data, len); applespi->saved_msg_len += len; if (rem > 0) return; message = (struct message *)applespi->msg_buf; msg_len = applespi->saved_msg_len; } else { message = (struct message *)&packet->data; msg_len = len; } /* got complete message - verify */ if (!applespi_verify_crc(applespi, (u8 *)message, msg_len)) goto msg_complete; if (le16_to_cpu(message->length) != msg_len - MSG_HEADER_SIZE - 2) { dev_warn_ratelimited(&applespi->spi->dev, "Received corrupted packet (invalid message length %u - expected %u)\n", le16_to_cpu(message->length), msg_len - MSG_HEADER_SIZE - 2); goto msg_complete; } /* handle message */ if (packet->flags == PACKET_TYPE_READ && packet->device == PACKET_DEV_KEYB) { applespi_handle_keyboard_event(applespi, &message->keyboard); } else if (packet->flags == PACKET_TYPE_READ && packet->device == PACKET_DEV_TPAD) { struct touchpad_protocol *tp; size_t tp_len; tp = &message->touchpad; tp_len = struct_size(tp, fingers, tp->number_of_fingers); if (le16_to_cpu(message->length) + 2 != tp_len) { dev_warn_ratelimited(&applespi->spi->dev, "Received corrupted packet (invalid message length %u - num-fingers %u, tp-len %zu)\n", le16_to_cpu(message->length), tp->number_of_fingers, tp_len); goto msg_complete; } if (tp->number_of_fingers > MAX_FINGERS) { dev_warn_ratelimited(&applespi->spi->dev, "Number of reported fingers (%u) exceeds max (%u))\n", tp->number_of_fingers, MAX_FINGERS); tp->number_of_fingers = MAX_FINGERS; } report_tp_state(applespi, tp); } else if (packet->flags == PACKET_TYPE_WRITE) { applespi_handle_cmd_response(applespi, packet, message); } msg_complete: applespi->saved_msg_len = 0; applespi_msg_complete(applespi, packet->flags == PACKET_TYPE_WRITE, true); } static void applespi_async_read_complete(void *context) { struct applespi_data *applespi = context; if (applespi->rd_m.status < 0) { dev_warn(&applespi->spi->dev, "Error reading from device: %d\n", applespi->rd_m.status); /* * We don't actually know if this was a pure read, or a response * to a write. But this is a rare error condition that should * never occur, so clearing both flags to avoid deadlock. */ applespi_msg_complete(applespi, true, true); } else { applespi_got_data(applespi); } acpi_finish_gpe(NULL, applespi->gpe); } static u32 applespi_notify(acpi_handle gpe_device, u32 gpe, void *context) { struct applespi_data *applespi = context; int sts; unsigned long flags; trace_applespi_irq_received(ET_RD_IRQ, PT_READ); spin_lock_irqsave(&applespi->cmd_msg_lock, flags); if (!applespi->suspended) { sts = applespi_async(applespi, &applespi->rd_m, applespi_async_read_complete); if (sts) dev_warn(&applespi->spi->dev, "Error queueing async read to device: %d\n", sts); else applespi->read_active = true; } spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); return ACPI_INTERRUPT_HANDLED; } static int applespi_get_saved_bl_level(struct applespi_data *applespi) { struct efivar_entry *efivar_entry; u16 efi_data = 0; unsigned long efi_data_len; int sts; efivar_entry = kmalloc(sizeof(*efivar_entry), GFP_KERNEL); if (!efivar_entry) return -ENOMEM; memcpy(efivar_entry->var.VariableName, EFI_BL_LEVEL_NAME, sizeof(EFI_BL_LEVEL_NAME)); efivar_entry->var.VendorGuid = EFI_BL_LEVEL_GUID; efi_data_len = sizeof(efi_data); sts = efivar_entry_get(efivar_entry, NULL, &efi_data_len, &efi_data); if (sts && sts != -ENOENT) dev_warn(&applespi->spi->dev, "Error getting backlight level from EFI vars: %d\n", sts); kfree(efivar_entry); return sts ? sts : efi_data; } static void applespi_save_bl_level(struct applespi_data *applespi, unsigned int level) { efi_guid_t efi_guid; u32 efi_attr; unsigned long efi_data_len; u16 efi_data; int sts; /* Save keyboard backlight level */ efi_guid = EFI_BL_LEVEL_GUID; efi_data = (u16)level; efi_data_len = sizeof(efi_data); efi_attr = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS; sts = efivar_entry_set_safe((efi_char16_t *)EFI_BL_LEVEL_NAME, efi_guid, efi_attr, true, efi_data_len, &efi_data); if (sts) dev_warn(&applespi->spi->dev, "Error saving backlight level to EFI vars: %d\n", sts); } static int applespi_probe(struct spi_device *spi) { struct applespi_data *applespi; acpi_handle spi_handle = ACPI_HANDLE(&spi->dev); acpi_status acpi_sts; int sts, i; unsigned long long gpe, usb_status; /* check if the USB interface is present and enabled already */ acpi_sts = acpi_evaluate_integer(spi_handle, "UIST", NULL, &usb_status); if (ACPI_SUCCESS(acpi_sts) && usb_status) { /* let the USB driver take over instead */ dev_info(&spi->dev, "USB interface already enabled\n"); return -ENODEV; } /* allocate driver data */ applespi = devm_kzalloc(&spi->dev, sizeof(*applespi), GFP_KERNEL); if (!applespi) return -ENOMEM; applespi->spi = spi; INIT_WORK(&applespi->work, applespi_worker); /* store the driver data */ spi_set_drvdata(spi, applespi); /* create our buffers */ applespi->tx_buffer = devm_kmalloc(&spi->dev, APPLESPI_PACKET_SIZE, GFP_KERNEL); applespi->tx_status = devm_kmalloc(&spi->dev, APPLESPI_STATUS_SIZE, GFP_KERNEL); applespi->rx_buffer = devm_kmalloc(&spi->dev, APPLESPI_PACKET_SIZE, GFP_KERNEL); applespi->msg_buf = devm_kmalloc_array(&spi->dev, MAX_PKTS_PER_MSG, APPLESPI_PACKET_SIZE, GFP_KERNEL); if (!applespi->tx_buffer || !applespi->tx_status || !applespi->rx_buffer || !applespi->msg_buf) return -ENOMEM; /* set up our spi messages */ applespi_setup_read_txfrs(applespi); applespi_setup_write_txfrs(applespi); /* cache ACPI method handles */ acpi_sts = acpi_get_handle(spi_handle, "SIEN", &applespi->sien); if (ACPI_FAILURE(acpi_sts)) { dev_err(&applespi->spi->dev, "Failed to get SIEN ACPI method handle: %s\n", acpi_format_exception(acpi_sts)); return -ENODEV; } acpi_sts = acpi_get_handle(spi_handle, "SIST", &applespi->sist); if (ACPI_FAILURE(acpi_sts)) { dev_err(&applespi->spi->dev, "Failed to get SIST ACPI method handle: %s\n", acpi_format_exception(acpi_sts)); return -ENODEV; } /* switch on the SPI interface */ sts = applespi_setup_spi(applespi); if (sts) return sts; sts = applespi_enable_spi(applespi); if (sts) return sts; /* setup the keyboard input dev */ applespi->keyboard_input_dev = devm_input_allocate_device(&spi->dev); if (!applespi->keyboard_input_dev) return -ENOMEM; applespi->keyboard_input_dev->name = "Apple SPI Keyboard"; applespi->keyboard_input_dev->phys = "applespi/input0"; applespi->keyboard_input_dev->dev.parent = &spi->dev; applespi->keyboard_input_dev->id.bustype = BUS_SPI; applespi->keyboard_input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) | BIT_MASK(EV_REP); applespi->keyboard_input_dev->ledbit[0] = BIT_MASK(LED_CAPSL); input_set_drvdata(applespi->keyboard_input_dev, applespi); applespi->keyboard_input_dev->event = applespi_event; for (i = 0; i < ARRAY_SIZE(applespi_scancodes); i++) if (applespi_scancodes[i]) input_set_capability(applespi->keyboard_input_dev, EV_KEY, applespi_scancodes[i]); for (i = 0; i < ARRAY_SIZE(applespi_controlcodes); i++) if (applespi_controlcodes[i]) input_set_capability(applespi->keyboard_input_dev, EV_KEY, applespi_controlcodes[i]); for (i = 0; i < ARRAY_SIZE(applespi_fn_codes); i++) if (applespi_fn_codes[i].to) input_set_capability(applespi->keyboard_input_dev, EV_KEY, applespi_fn_codes[i].to); input_set_capability(applespi->keyboard_input_dev, EV_KEY, KEY_FN); sts = input_register_device(applespi->keyboard_input_dev); if (sts) { dev_err(&applespi->spi->dev, "Unable to register keyboard input device (%d)\n", sts); return -ENODEV; } /* * The applespi device doesn't send interrupts normally (as is described * in its DSDT), but rather seems to use ACPI GPEs. */ acpi_sts = acpi_evaluate_integer(spi_handle, "_GPE", NULL, &gpe); if (ACPI_FAILURE(acpi_sts)) { dev_err(&applespi->spi->dev, "Failed to obtain GPE for SPI slave device: %s\n", acpi_format_exception(acpi_sts)); return -ENODEV; } applespi->gpe = (int)gpe; acpi_sts = acpi_install_gpe_handler(NULL, applespi->gpe, ACPI_GPE_LEVEL_TRIGGERED, applespi_notify, applespi); if (ACPI_FAILURE(acpi_sts)) { dev_err(&applespi->spi->dev, "Failed to install GPE handler for GPE %d: %s\n", applespi->gpe, acpi_format_exception(acpi_sts)); return -ENODEV; } applespi->suspended = false; acpi_sts = acpi_enable_gpe(NULL, applespi->gpe); if (ACPI_FAILURE(acpi_sts)) { dev_err(&applespi->spi->dev, "Failed to enable GPE handler for GPE %d: %s\n", applespi->gpe, acpi_format_exception(acpi_sts)); acpi_remove_gpe_handler(NULL, applespi->gpe, applespi_notify); return -ENODEV; } /* trigger touchpad setup */ applespi_init(applespi, false); /* * By default this device is not enabled for wakeup; but USB keyboards * generally are, so the expectation is that by default the keyboard * will wake the system. */ device_wakeup_enable(&spi->dev); /* set up keyboard-backlight */ sts = applespi_get_saved_bl_level(applespi); if (sts >= 0) applespi_set_bl_level(&applespi->backlight_info, sts); applespi->backlight_info.name = "spi::kbd_backlight"; applespi->backlight_info.default_trigger = "kbd-backlight"; applespi->backlight_info.brightness_set = applespi_set_bl_level; sts = devm_led_classdev_register(&spi->dev, &applespi->backlight_info); if (sts) dev_warn(&applespi->spi->dev, "Unable to register keyboard backlight class dev (%d)\n", sts); /* set up debugfs entries for touchpad dimensions logging */ applespi->debugfs_root = debugfs_create_dir("applespi", NULL); debugfs_create_bool("enable_tp_dim", 0600, applespi->debugfs_root, &applespi->debug_tp_dim); debugfs_create_file("tp_dim", 0400, applespi->debugfs_root, applespi, &applespi_tp_dim_fops); return 0; } static void applespi_drain_writes(struct applespi_data *applespi) { unsigned long flags; spin_lock_irqsave(&applespi->cmd_msg_lock, flags); applespi->drain = true; wait_event_lock_irq(applespi->drain_complete, !applespi->write_active, applespi->cmd_msg_lock); spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); } static void applespi_drain_reads(struct applespi_data *applespi) { unsigned long flags; spin_lock_irqsave(&applespi->cmd_msg_lock, flags); wait_event_lock_irq(applespi->drain_complete, !applespi->read_active, applespi->cmd_msg_lock); applespi->suspended = true; spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); } static int applespi_remove(struct spi_device *spi) { struct applespi_data *applespi = spi_get_drvdata(spi); applespi_drain_writes(applespi); acpi_disable_gpe(NULL, applespi->gpe); acpi_remove_gpe_handler(NULL, applespi->gpe, applespi_notify); device_wakeup_disable(&spi->dev); applespi_drain_reads(applespi); debugfs_remove_recursive(applespi->debugfs_root); return 0; } static void applespi_shutdown(struct spi_device *spi) { struct applespi_data *applespi = spi_get_drvdata(spi); applespi_save_bl_level(applespi, applespi->have_bl_level); } static int applespi_poweroff_late(struct device *dev) { struct spi_device *spi = to_spi_device(dev); struct applespi_data *applespi = spi_get_drvdata(spi); applespi_save_bl_level(applespi, applespi->have_bl_level); return 0; } static int __maybe_unused applespi_suspend(struct device *dev) { struct spi_device *spi = to_spi_device(dev); struct applespi_data *applespi = spi_get_drvdata(spi); acpi_status acpi_sts; int sts; /* turn off caps-lock - it'll stay on otherwise */ sts = applespi_set_capsl_led(applespi, false); if (sts) dev_warn(&applespi->spi->dev, "Failed to turn off caps-lock led (%d)\n", sts); applespi_drain_writes(applespi); /* disable the interrupt */ acpi_sts = acpi_disable_gpe(NULL, applespi->gpe); if (ACPI_FAILURE(acpi_sts)) dev_err(&applespi->spi->dev, "Failed to disable GPE handler for GPE %d: %s\n", applespi->gpe, acpi_format_exception(acpi_sts)); applespi_drain_reads(applespi); return 0; } static int __maybe_unused applespi_resume(struct device *dev) { struct spi_device *spi = to_spi_device(dev); struct applespi_data *applespi = spi_get_drvdata(spi); acpi_status acpi_sts; unsigned long flags; /* ensure our flags and state reflect a newly resumed device */ spin_lock_irqsave(&applespi->cmd_msg_lock, flags); applespi->drain = false; applespi->have_cl_led_on = false; applespi->have_bl_level = 0; applespi->cmd_msg_queued = 0; applespi->read_active = false; applespi->write_active = false; applespi->suspended = false; spin_unlock_irqrestore(&applespi->cmd_msg_lock, flags); /* switch on the SPI interface */ applespi_enable_spi(applespi); /* re-enable the interrupt */ acpi_sts = acpi_enable_gpe(NULL, applespi->gpe); if (ACPI_FAILURE(acpi_sts)) dev_err(&applespi->spi->dev, "Failed to re-enable GPE handler for GPE %d: %s\n", applespi->gpe, acpi_format_exception(acpi_sts)); /* switch the touchpad into multitouch mode */ applespi_init(applespi, true); return 0; } static const struct acpi_device_id applespi_acpi_match[] = { { "APP000D", 0 }, { } }; MODULE_DEVICE_TABLE(acpi, applespi_acpi_match); static const struct dev_pm_ops applespi_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(applespi_suspend, applespi_resume) .poweroff_late = applespi_poweroff_late, }; static struct spi_driver applespi_driver = { .driver = { .name = "applespi", .acpi_match_table = applespi_acpi_match, .pm = &applespi_pm_ops, }, .probe = applespi_probe, .remove = applespi_remove, .shutdown = applespi_shutdown, }; module_spi_driver(applespi_driver) MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("MacBook(Pro) SPI Keyboard/Touchpad driver"); MODULE_AUTHOR("Federico Lorenzi"); MODULE_AUTHOR("Ronald Tschalär");
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