| // 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/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 coodinate |
| * @abs_y: absolute y coodinate |
| * @rel_x: relative x coodinate |
| * @rel_y: relative y coodinate |
| * @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[0]; |
| }; |
| |
| /** |
| * 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. |
| */ |
| 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; |
| bool 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_usecs = applespi->spi_settings.spi_cs_delay; |
| |
| 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_usecs = SPI_RW_CHG_DELAY_US; |
| wt_t->cs_change = 1; |
| |
| dl_t->delay_usecs = applespi->spi_settings.spi_cs_delay; |
| |
| wr_t->tx_buf = applespi->tx_buffer; |
| wr_t->len = APPLESPI_PACKET_SIZE; |
| wr_t->delay_usecs = SPI_RW_CHG_DELAY_US; |
| |
| 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 = false; |
| 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); |
| |
| 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) |
| return 0; |
| |
| /* 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 = true; |
| 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_t(int, applespi->tp_dim_min_x, f->abs_x); |
| applespi->tp_dim_max_x = max_t(int, applespi->tp_dim_max_x, f->abs_x); |
| applespi->tp_dim_min_y = min_t(int, applespi->tp_dim_min_y, f->abs_y); |
| applespi->tp_dim_max_y = max_t(int, applespi->tp_dim_max_y, 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 = sizeof(*tp) + |
| tp->number_of_fingers * sizeof(tp->fingers[0]); |
| |
| 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_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); |
| if (IS_ERR(applespi->debugfs_root)) { |
| if (PTR_ERR(applespi->debugfs_root) != -ENODEV) |
| dev_warn(&applespi->spi->dev, |
| "Error creating debugfs root entry (%ld)\n", |
| PTR_ERR(applespi->debugfs_root)); |
| } else { |
| struct dentry *ret; |
| |
| ret = debugfs_create_bool("enable_tp_dim", 0600, |
| applespi->debugfs_root, |
| &applespi->debug_tp_dim); |
| if (IS_ERR(ret)) |
| dev_dbg(&applespi->spi->dev, |
| "Error creating debugfs entry enable_tp_dim (%ld)\n", |
| PTR_ERR(ret)); |
| |
| ret = debugfs_create_file("tp_dim", 0400, |
| applespi->debugfs_root, applespi, |
| &applespi_tp_dim_fops); |
| if (IS_ERR(ret)) |
| dev_dbg(&applespi->spi->dev, |
| "Error creating debugfs entry tp_dim (%ld)\n", |
| PTR_ERR(ret)); |
| } |
| |
| 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 = false; |
| 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); |
| |
| 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"); |