| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hans de Goede | 4196 | 99.90% | 2 | 33.33% |
| Uwe Kleine-König | 2 | 0.05% | 2 | 33.33% |
| Thomas Weißschuh | 2 | 0.05% | 2 | 33.33% |
| Total | 4200 | 6 |
// SPDX-License-Identifier: GPL-2.0+ /* * This is a driver for the keyboard, touchpad and USB port of the * keyboard dock for the Asus TF103C 2-in-1 tablet. * * This keyboard dock has its own I2C attached embedded controller * and the keyboard and touchpad are also connected over I2C, * instead of using the usual USB connection. This means that the * keyboard dock requires this special driver to function. * * Copyright (C) 2021 Hans de Goede <hdegoede@redhat.com> */ #include <linux/acpi.h> #include <linux/delay.h> #include <linux/dmi.h> #include <linux/gpio/consumer.h> #include <linux/gpio/machine.h> #include <linux/hid.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/mod_devicetable.h> #include <linux/moduleparam.h> #include <linux/module.h> #include <linux/pm.h> #include <linux/workqueue.h> #include <asm/unaligned.h> static bool fnlock; module_param(fnlock, bool, 0644); MODULE_PARM_DESC(fnlock, "By default the kbd toprow sends multimedia key presses. AltGr " "can be pressed to change this to F1-F12. Set this to 1 to " "change the default. Press AltGr + Esc to toggle at runtime."); #define TF103C_DOCK_DEV_NAME "NPCE69A:00" #define TF103C_DOCK_HPD_DEBOUNCE msecs_to_jiffies(20) /*** Touchpad I2C device defines ***/ #define TF103C_DOCK_TP_ADDR 0x15 /*** Keyboard I2C device defines **A*/ #define TF103C_DOCK_KBD_ADDR 0x16 #define TF103C_DOCK_KBD_DATA_REG 0x73 #define TF103C_DOCK_KBD_DATA_MIN_LENGTH 4 #define TF103C_DOCK_KBD_DATA_MAX_LENGTH 11 #define TF103C_DOCK_KBD_DATA_MODIFIERS 3 #define TF103C_DOCK_KBD_DATA_KEYS 5 #define TF103C_DOCK_KBD_CMD_REG 0x75 #define TF103C_DOCK_KBD_CMD_ENABLE 0x0800 /*** EC innterrupt data I2C device defines ***/ #define TF103C_DOCK_INTR_ADDR 0x19 #define TF103C_DOCK_INTR_DATA_REG 0x6a #define TF103C_DOCK_INTR_DATA1_OBF_MASK 0x01 #define TF103C_DOCK_INTR_DATA1_KEY_MASK 0x04 #define TF103C_DOCK_INTR_DATA1_KBC_MASK 0x08 #define TF103C_DOCK_INTR_DATA1_AUX_MASK 0x20 #define TF103C_DOCK_INTR_DATA1_SCI_MASK 0x40 #define TF103C_DOCK_INTR_DATA1_SMI_MASK 0x80 /* Special values for the OOB data on kbd_client / tp_client */ #define TF103C_DOCK_INTR_DATA1_OOB_VALUE 0xc1 #define TF103C_DOCK_INTR_DATA2_OOB_VALUE 0x04 #define TF103C_DOCK_SMI_AC_EVENT 0x31 #define TF103C_DOCK_SMI_HANDSHAKING 0x50 #define TF103C_DOCK_SMI_EC_WAKEUP 0x53 #define TF103C_DOCK_SMI_BOOTBLOCK_RESET 0x5e #define TF103C_DOCK_SMI_WATCHDOG_RESET 0x5f #define TF103C_DOCK_SMI_ADAPTER_CHANGE 0x60 #define TF103C_DOCK_SMI_DOCK_INSERT 0x61 #define TF103C_DOCK_SMI_DOCK_REMOVE 0x62 #define TF103C_DOCK_SMI_PAD_BL_CHANGE 0x63 #define TF103C_DOCK_SMI_HID_STATUS_CHANGED 0x64 #define TF103C_DOCK_SMI_HID_WAKEUP 0x65 #define TF103C_DOCK_SMI_S3 0x83 #define TF103C_DOCK_SMI_S5 0x85 #define TF103C_DOCK_SMI_NOTIFY_SHUTDOWN 0x90 #define TF103C_DOCK_SMI_RESUME 0x91 /*** EC (dockram) I2C device defines ***/ #define TF103C_DOCK_EC_ADDR 0x1b #define TF103C_DOCK_EC_CMD_REG 0x0a #define TF103C_DOCK_EC_CMD_LEN 9 enum { TF103C_DOCK_FLAG_HID_OPEN, }; struct tf103c_dock_data { struct delayed_work hpd_work; struct irq_chip tp_irqchip; struct irq_domain *tp_irq_domain; struct i2c_client *ec_client; struct i2c_client *intr_client; struct i2c_client *kbd_client; struct i2c_client *tp_client; struct gpio_desc *pwr_en; struct gpio_desc *irq_gpio; struct gpio_desc *hpd_gpio; struct input_dev *input; struct hid_device *hid; unsigned long flags; int board_rev; int irq; int hpd_irq; int tp_irq; int last_press_0x13; int last_press_0x14; bool enabled; bool tp_enabled; bool altgr_pressed; bool esc_pressed; bool filter_esc; u8 kbd_buf[TF103C_DOCK_KBD_DATA_MAX_LENGTH]; }; static struct gpiod_lookup_table tf103c_dock_gpios = { .dev_id = "i2c-" TF103C_DOCK_DEV_NAME, .table = { GPIO_LOOKUP("INT33FC:00", 55, "dock_pwr_en", GPIO_ACTIVE_HIGH), GPIO_LOOKUP("INT33FC:02", 1, "dock_irq", GPIO_ACTIVE_HIGH), GPIO_LOOKUP("INT33FC:02", 29, "dock_hpd", GPIO_ACTIVE_HIGH), GPIO_LOOKUP("gpio_crystalcove", 2, "board_rev", GPIO_ACTIVE_HIGH), {} }, }; /* Byte 0 is the length of the rest of the packet */ static const u8 tf103c_dock_enable_cmd[9] = { 8, 0x20, 0, 0, 0, 0, 0x20, 0, 0 }; static const u8 tf103c_dock_usb_enable_cmd[9] = { 8, 0, 0, 0, 0, 0, 0, 0x40, 0 }; static const u8 tf103c_dock_suspend_cmd[9] = { 8, 0, 0x20, 0, 0, 0x22, 0, 0, 0 }; /*** keyboard related code ***/ static u8 tf103c_dock_kbd_hid_desc[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x06, /* Usage (Keyboard), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x11, /* Report ID (17), */ 0x95, 0x08, /* Report Count (8), */ 0x75, 0x01, /* Report Size (1), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x05, 0x07, /* Usage Page (Keyboard), */ 0x19, 0xE0, /* Usage Minimum (KB Leftcontrol), */ 0x29, 0xE7, /* Usage Maximum (KB Right GUI), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x01, /* Report Count (1), */ 0x75, 0x08, /* Report Size (8), */ 0x81, 0x01, /* Input (Constant), */ 0x95, 0x06, /* Report Count (6), */ 0x75, 0x08, /* Report Size (8), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x05, 0x07, /* Usage Page (Keyboard), */ 0x19, 0x00, /* Usage Minimum (None), */ 0x2A, 0xFF, 0x00, /* Usage Maximum (FFh), */ 0x81, 0x00, /* Input, */ 0xC0 /* End Collection */ }; static int tf103c_dock_kbd_read(struct tf103c_dock_data *dock) { struct i2c_client *client = dock->kbd_client; struct device *dev = &dock->ec_client->dev; struct i2c_msg msgs[2]; u8 reg[2]; int ret; reg[0] = TF103C_DOCK_KBD_DATA_REG & 0xff; reg[1] = TF103C_DOCK_KBD_DATA_REG >> 8; msgs[0].addr = client->addr; msgs[0].flags = 0; msgs[0].len = sizeof(reg); msgs[0].buf = reg; msgs[1].addr = client->addr; msgs[1].flags = I2C_M_RD; msgs[1].len = TF103C_DOCK_KBD_DATA_MAX_LENGTH; msgs[1].buf = dock->kbd_buf; ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); if (ret != ARRAY_SIZE(msgs)) { dev_err(dev, "error %d reading kbd data\n", ret); return -EIO; } return 0; } static void tf103c_dock_kbd_write(struct tf103c_dock_data *dock, u16 cmd) { struct device *dev = &dock->ec_client->dev; u8 buf[4]; int ret; put_unaligned_le16(TF103C_DOCK_KBD_CMD_REG, &buf[0]); put_unaligned_le16(cmd, &buf[2]); ret = i2c_master_send(dock->kbd_client, buf, sizeof(buf)); if (ret != sizeof(buf)) dev_err(dev, "error %d writing kbd cmd\n", ret); } /* HID ll_driver functions for forwarding input-reports from the kbd_client */ static int tf103c_dock_hid_parse(struct hid_device *hid) { return hid_parse_report(hid, tf103c_dock_kbd_hid_desc, sizeof(tf103c_dock_kbd_hid_desc)); } static int tf103c_dock_hid_start(struct hid_device *hid) { return 0; } static void tf103c_dock_hid_stop(struct hid_device *hid) { hid->claimed = 0; } static int tf103c_dock_hid_open(struct hid_device *hid) { struct tf103c_dock_data *dock = hid->driver_data; set_bit(TF103C_DOCK_FLAG_HID_OPEN, &dock->flags); return 0; } static void tf103c_dock_hid_close(struct hid_device *hid) { struct tf103c_dock_data *dock = hid->driver_data; clear_bit(TF103C_DOCK_FLAG_HID_OPEN, &dock->flags); } /* Mandatory, but not used */ static int tf103c_dock_hid_raw_request(struct hid_device *hid, u8 reportnum, u8 *buf, size_t len, u8 rtype, int reqtype) { return 0; } static const struct hid_ll_driver tf103c_dock_hid_ll_driver = { .parse = tf103c_dock_hid_parse, .start = tf103c_dock_hid_start, .stop = tf103c_dock_hid_stop, .open = tf103c_dock_hid_open, .close = tf103c_dock_hid_close, .raw_request = tf103c_dock_hid_raw_request, }; static const int tf103c_dock_toprow_codes[13][2] = { /* Normal, AltGr pressed */ { KEY_POWER, KEY_F1 }, { KEY_RFKILL, KEY_F2 }, { KEY_F21, KEY_F3 }, /* Touchpad toggle, userspace expects F21 */ { KEY_BRIGHTNESSDOWN, KEY_F4 }, { KEY_BRIGHTNESSUP, KEY_F5 }, { KEY_CAMERA, KEY_F6 }, { KEY_CONFIG, KEY_F7 }, { KEY_PREVIOUSSONG, KEY_F8 }, { KEY_PLAYPAUSE, KEY_F9 }, { KEY_NEXTSONG, KEY_F10 }, { KEY_MUTE, KEY_F11 }, { KEY_VOLUMEDOWN, KEY_F12 }, { KEY_VOLUMEUP, KEY_SYSRQ }, }; static void tf103c_dock_report_toprow_kbd_hook(struct tf103c_dock_data *dock) { u8 *esc, *buf = dock->kbd_buf; int size; /* * Stop AltGr reports from getting reported on the "Asus TF103C Dock * Keyboard" input_dev, since this gets used as "Fn" key for the toprow * keys. Instead we report this on the "Asus TF103C Dock Top Row Keys" * input_dev, when not used to modify the toprow keys. */ dock->altgr_pressed = buf[TF103C_DOCK_KBD_DATA_MODIFIERS] & 0x40; buf[TF103C_DOCK_KBD_DATA_MODIFIERS] &= ~0x40; input_report_key(dock->input, KEY_RIGHTALT, dock->altgr_pressed); input_sync(dock->input); /* Toggle fnlock on AltGr + Esc press */ buf = buf + TF103C_DOCK_KBD_DATA_KEYS; size = TF103C_DOCK_KBD_DATA_MAX_LENGTH - TF103C_DOCK_KBD_DATA_KEYS; esc = memchr(buf, 0x29, size); if (!dock->esc_pressed && esc) { if (dock->altgr_pressed) { fnlock = !fnlock; dock->filter_esc = true; } } if (esc && dock->filter_esc) *esc = 0; else dock->filter_esc = false; dock->esc_pressed = esc != NULL; } static void tf103c_dock_toprow_press(struct tf103c_dock_data *dock, int key_code) { /* * Release AltGr before reporting the toprow key, so that userspace * sees e.g. just KEY_SUSPEND and not AltGr + KEY_SUSPEND. */ if (dock->altgr_pressed) { input_report_key(dock->input, KEY_RIGHTALT, false); input_sync(dock->input); } input_report_key(dock->input, key_code, true); input_sync(dock->input); } static void tf103c_dock_toprow_release(struct tf103c_dock_data *dock, int key_code) { input_report_key(dock->input, key_code, false); input_sync(dock->input); if (dock->altgr_pressed) { input_report_key(dock->input, KEY_RIGHTALT, true); input_sync(dock->input); } } static void tf103c_dock_toprow_event(struct tf103c_dock_data *dock, int toprow_index, int *last_press) { int key_code, fn = dock->altgr_pressed ^ fnlock; if (last_press && *last_press) { tf103c_dock_toprow_release(dock, *last_press); *last_press = 0; } if (toprow_index < 0) return; key_code = tf103c_dock_toprow_codes[toprow_index][fn]; tf103c_dock_toprow_press(dock, key_code); if (last_press) *last_press = key_code; else tf103c_dock_toprow_release(dock, key_code); } /* * The keyboard sends what appears to be standard I2C-HID input-reports, * except that a 16 bit register address of where the I2C-HID format * input-reports are stored must be send before reading it in a single * (I2C repeated-start) I2C transaction. * * Its unknown how to get the HID descriptors but they are easy to reconstruct: * * Input report id 0x11 is 8 bytes long and contain standard USB HID intf-class, * Boot Interface Subclass reports. * Input report id 0x13 is 2 bytes long and sends Consumer Control events * Input report id 0x14 is 1 byte long and sends System Control events * * However the top row keys (where a normal keyboard has F1-F12 + Print-Screen) * are a mess, using a mix of the 0x13 and 0x14 input reports as well as EC SCI * events; and these need special handling to allow actually sending F1-F12, * since the Fn key on the keyboard only works on the cursor keys and the top * row keys always send their special "Multimedia hotkey" codes. * * So only forward the 0x11 reports to HID and handle the top-row keys here. */ static void tf103c_dock_kbd_interrupt(struct tf103c_dock_data *dock) { struct device *dev = &dock->ec_client->dev; u8 *buf = dock->kbd_buf; int size; if (tf103c_dock_kbd_read(dock)) return; size = buf[0] | buf[1] << 8; if (size < TF103C_DOCK_KBD_DATA_MIN_LENGTH || size > TF103C_DOCK_KBD_DATA_MAX_LENGTH) { dev_err(dev, "error reported kbd pkt size %d is out of range %d-%d\n", size, TF103C_DOCK_KBD_DATA_MIN_LENGTH, TF103C_DOCK_KBD_DATA_MAX_LENGTH); return; } switch (buf[2]) { case 0x11: if (size != 11) break; tf103c_dock_report_toprow_kbd_hook(dock); if (test_bit(TF103C_DOCK_FLAG_HID_OPEN, &dock->flags)) hid_input_report(dock->hid, HID_INPUT_REPORT, buf + 2, size - 2, 1); return; case 0x13: if (size != 5) break; switch (buf[3] | buf[4] << 8) { case 0: tf103c_dock_toprow_event(dock, -1, &dock->last_press_0x13); return; case 0x70: tf103c_dock_toprow_event(dock, 3, &dock->last_press_0x13); return; case 0x6f: tf103c_dock_toprow_event(dock, 4, &dock->last_press_0x13); return; case 0xb6: tf103c_dock_toprow_event(dock, 7, &dock->last_press_0x13); return; case 0xcd: tf103c_dock_toprow_event(dock, 8, &dock->last_press_0x13); return; case 0xb5: tf103c_dock_toprow_event(dock, 9, &dock->last_press_0x13); return; case 0xe2: tf103c_dock_toprow_event(dock, 10, &dock->last_press_0x13); return; case 0xea: tf103c_dock_toprow_event(dock, 11, &dock->last_press_0x13); return; case 0xe9: tf103c_dock_toprow_event(dock, 12, &dock->last_press_0x13); return; } break; case 0x14: if (size != 4) break; switch (buf[3]) { case 0: tf103c_dock_toprow_event(dock, -1, &dock->last_press_0x14); return; case 1: tf103c_dock_toprow_event(dock, 0, &dock->last_press_0x14); return; } break; } dev_warn(dev, "warning unknown kbd data: %*ph\n", size, buf); } /*** touchpad related code ***/ static const struct property_entry tf103c_dock_touchpad_props[] = { PROPERTY_ENTRY_BOOL("elan,clickpad"), { } }; static const struct software_node tf103c_dock_touchpad_sw_node = { .properties = tf103c_dock_touchpad_props, }; /* * tf103c_enable_touchpad() is only called from the threaded interrupt handler * and tf103c_disable_touchpad() is only called after the irq is disabled, * so no locking is necessary. */ static void tf103c_dock_enable_touchpad(struct tf103c_dock_data *dock) { struct i2c_board_info board_info = { }; struct device *dev = &dock->ec_client->dev; int ret; if (dock->tp_enabled) { /* Happens after resume, the tp needs to be reinitialized */ ret = device_reprobe(&dock->tp_client->dev); if (ret) dev_err_probe(dev, ret, "reprobing tp-client\n"); return; } strscpy(board_info.type, "elan_i2c"); board_info.addr = TF103C_DOCK_TP_ADDR; board_info.dev_name = TF103C_DOCK_DEV_NAME "-tp"; board_info.irq = dock->tp_irq; board_info.swnode = &tf103c_dock_touchpad_sw_node; dock->tp_client = i2c_new_client_device(dock->ec_client->adapter, &board_info); if (IS_ERR(dock->tp_client)) { dev_err(dev, "error %ld creating tp client\n", PTR_ERR(dock->tp_client)); return; } dock->tp_enabled = true; } static void tf103c_dock_disable_touchpad(struct tf103c_dock_data *dock) { if (!dock->tp_enabled) return; i2c_unregister_device(dock->tp_client); dock->tp_enabled = false; } /*** interrupt handling code ***/ static void tf103c_dock_ec_cmd(struct tf103c_dock_data *dock, const u8 *cmd) { struct device *dev = &dock->ec_client->dev; int ret; ret = i2c_smbus_write_i2c_block_data(dock->ec_client, TF103C_DOCK_EC_CMD_REG, TF103C_DOCK_EC_CMD_LEN, cmd); if (ret) dev_err(dev, "error %d sending %*ph cmd\n", ret, TF103C_DOCK_EC_CMD_LEN, cmd); } static void tf103c_dock_sci(struct tf103c_dock_data *dock, u8 val) { struct device *dev = &dock->ec_client->dev; switch (val) { case 2: tf103c_dock_toprow_event(dock, 1, NULL); return; case 4: tf103c_dock_toprow_event(dock, 2, NULL); return; case 8: tf103c_dock_toprow_event(dock, 5, NULL); return; case 17: tf103c_dock_toprow_event(dock, 6, NULL); return; } dev_warn(dev, "warning unknown SCI value: 0x%02x\n", val); } static void tf103c_dock_smi(struct tf103c_dock_data *dock, u8 val) { struct device *dev = &dock->ec_client->dev; switch (val) { case TF103C_DOCK_SMI_EC_WAKEUP: tf103c_dock_ec_cmd(dock, tf103c_dock_enable_cmd); tf103c_dock_ec_cmd(dock, tf103c_dock_usb_enable_cmd); tf103c_dock_kbd_write(dock, TF103C_DOCK_KBD_CMD_ENABLE); break; case TF103C_DOCK_SMI_PAD_BL_CHANGE: /* There is no backlight, but the EC still sends this */ break; case TF103C_DOCK_SMI_HID_STATUS_CHANGED: tf103c_dock_enable_touchpad(dock); break; default: dev_warn(dev, "warning unknown SMI value: 0x%02x\n", val); break; } } static irqreturn_t tf103c_dock_irq(int irq, void *data) { struct tf103c_dock_data *dock = data; struct device *dev = &dock->ec_client->dev; u8 intr_data[8]; int ret; ret = i2c_smbus_read_i2c_block_data(dock->intr_client, TF103C_DOCK_INTR_DATA_REG, sizeof(intr_data), intr_data); if (ret != sizeof(intr_data)) { dev_err(dev, "error %d reading intr data\n", ret); return IRQ_NONE; } if (!(intr_data[1] & TF103C_DOCK_INTR_DATA1_OBF_MASK)) return IRQ_NONE; /* intr_data[0] is the length of the rest of the packet */ if (intr_data[0] == 3 && intr_data[1] == TF103C_DOCK_INTR_DATA1_OOB_VALUE && intr_data[2] == TF103C_DOCK_INTR_DATA2_OOB_VALUE) { /* intr_data[3] seems to contain a HID input report id */ switch (intr_data[3]) { case 0x01: handle_nested_irq(dock->tp_irq); break; case 0x11: case 0x13: case 0x14: tf103c_dock_kbd_interrupt(dock); break; default: dev_warn(dev, "warning unknown intr_data[3]: 0x%02x\n", intr_data[3]); break; } return IRQ_HANDLED; } if (intr_data[1] & TF103C_DOCK_INTR_DATA1_SCI_MASK) { tf103c_dock_sci(dock, intr_data[2]); return IRQ_HANDLED; } if (intr_data[1] & TF103C_DOCK_INTR_DATA1_SMI_MASK) { tf103c_dock_smi(dock, intr_data[2]); return IRQ_HANDLED; } dev_warn(dev, "warning unknown intr data: %*ph\n", 8, intr_data); return IRQ_NONE; } /* * tf103c_dock_[dis|en]able only run from hpd_work or at times when * hpd_work cannot run (hpd_irq disabled), so no locking is necessary. */ static void tf103c_dock_enable(struct tf103c_dock_data *dock) { if (dock->enabled) return; if (dock->board_rev != 2) gpiod_set_value(dock->pwr_en, 1); msleep(500); enable_irq(dock->irq); dock->enabled = true; } static void tf103c_dock_disable(struct tf103c_dock_data *dock) { if (!dock->enabled) return; disable_irq(dock->irq); tf103c_dock_disable_touchpad(dock); if (dock->board_rev != 2) gpiod_set_value(dock->pwr_en, 0); dock->enabled = false; } static void tf103c_dock_hpd_work(struct work_struct *work) { struct tf103c_dock_data *dock = container_of(work, struct tf103c_dock_data, hpd_work.work); if (gpiod_get_value(dock->hpd_gpio)) tf103c_dock_enable(dock); else tf103c_dock_disable(dock); } static irqreturn_t tf103c_dock_hpd_irq(int irq, void *data) { struct tf103c_dock_data *dock = data; mod_delayed_work(system_long_wq, &dock->hpd_work, TF103C_DOCK_HPD_DEBOUNCE); return IRQ_HANDLED; } static void tf103c_dock_start_hpd(struct tf103c_dock_data *dock) { enable_irq(dock->hpd_irq); /* Sync current HPD status */ queue_delayed_work(system_long_wq, &dock->hpd_work, TF103C_DOCK_HPD_DEBOUNCE); } static void tf103c_dock_stop_hpd(struct tf103c_dock_data *dock) { disable_irq(dock->hpd_irq); cancel_delayed_work_sync(&dock->hpd_work); } /*** probe ***/ static const struct dmi_system_id tf103c_dock_dmi_ids[] = { { .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), }, }, { } }; static void tf103c_dock_non_devm_cleanup(void *data) { struct tf103c_dock_data *dock = data; if (dock->tp_irq_domain) irq_domain_remove(dock->tp_irq_domain); if (!IS_ERR_OR_NULL(dock->hid)) hid_destroy_device(dock->hid); i2c_unregister_device(dock->kbd_client); i2c_unregister_device(dock->intr_client); gpiod_remove_lookup_table(&tf103c_dock_gpios); } static int tf103c_dock_probe(struct i2c_client *client) { struct i2c_board_info board_info = { }; struct device *dev = &client->dev; struct gpio_desc *board_rev_gpio; struct tf103c_dock_data *dock; enum gpiod_flags flags; int i, ret; /* GPIOs are hardcoded for the Asus TF103C, don't bind on other devs */ if (!dmi_check_system(tf103c_dock_dmi_ids)) return -ENODEV; dock = devm_kzalloc(dev, sizeof(*dock), GFP_KERNEL); if (!dock) return -ENOMEM; INIT_DELAYED_WORK(&dock->hpd_work, tf103c_dock_hpd_work); /* 1. Get GPIOs and their IRQs */ gpiod_add_lookup_table(&tf103c_dock_gpios); ret = devm_add_action_or_reset(dev, tf103c_dock_non_devm_cleanup, dock); if (ret) return ret; /* * The pin is configured as input by default, use ASIS because otherwise * the gpio-crystalcove.c switches off the internal pull-down replacing * it with a pull-up. */ board_rev_gpio = gpiod_get(dev, "board_rev", GPIOD_ASIS); if (IS_ERR(board_rev_gpio)) return dev_err_probe(dev, PTR_ERR(board_rev_gpio), "requesting board_rev GPIO\n"); dock->board_rev = gpiod_get_value_cansleep(board_rev_gpio) + 1; gpiod_put(board_rev_gpio); /* * The Android driver drives the dock-pwr-en pin high at probe for * revision 2 boards and then never touches it again? * This code has only been tested on a revision 1 board, so for now * just mimick what Android does on revision 2 boards. */ flags = (dock->board_rev == 2) ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; dock->pwr_en = devm_gpiod_get(dev, "dock_pwr_en", flags); if (IS_ERR(dock->pwr_en)) return dev_err_probe(dev, PTR_ERR(dock->pwr_en), "requesting pwr_en GPIO\n"); dock->irq_gpio = devm_gpiod_get(dev, "dock_irq", GPIOD_IN); if (IS_ERR(dock->irq_gpio)) return dev_err_probe(dev, PTR_ERR(dock->irq_gpio), "requesting IRQ GPIO\n"); dock->irq = gpiod_to_irq(dock->irq_gpio); if (dock->irq < 0) return dev_err_probe(dev, dock->irq, "getting dock IRQ"); ret = devm_request_threaded_irq(dev, dock->irq, NULL, tf103c_dock_irq, IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_NO_AUTOEN, "dock_irq", dock); if (ret) return dev_err_probe(dev, ret, "requesting dock IRQ"); dock->hpd_gpio = devm_gpiod_get(dev, "dock_hpd", GPIOD_IN); if (IS_ERR(dock->hpd_gpio)) return dev_err_probe(dev, PTR_ERR(dock->hpd_gpio), "requesting HPD GPIO\n"); dock->hpd_irq = gpiod_to_irq(dock->hpd_gpio); if (dock->hpd_irq < 0) return dev_err_probe(dev, dock->hpd_irq, "getting HPD IRQ"); ret = devm_request_irq(dev, dock->hpd_irq, tf103c_dock_hpd_irq, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_NO_AUTOEN, "dock_hpd", dock); if (ret) return ret; /* * 2. Create I2C clients. The dock uses 4 different i2c addresses, * the ACPI NPCE69A node being probed points to the EC address. */ dock->ec_client = client; strscpy(board_info.type, "tf103c-dock-intr"); board_info.addr = TF103C_DOCK_INTR_ADDR; board_info.dev_name = TF103C_DOCK_DEV_NAME "-intr"; dock->intr_client = i2c_new_client_device(client->adapter, &board_info); if (IS_ERR(dock->intr_client)) return dev_err_probe(dev, PTR_ERR(dock->intr_client), "creating intr client\n"); strscpy(board_info.type, "tf103c-dock-kbd"); board_info.addr = TF103C_DOCK_KBD_ADDR; board_info.dev_name = TF103C_DOCK_DEV_NAME "-kbd"; dock->kbd_client = i2c_new_client_device(client->adapter, &board_info); if (IS_ERR(dock->kbd_client)) return dev_err_probe(dev, PTR_ERR(dock->kbd_client), "creating kbd client\n"); /* 3. Create input_dev for the top row of the keyboard */ dock->input = devm_input_allocate_device(dev); if (!dock->input) return -ENOMEM; dock->input->name = "Asus TF103C Dock Top Row Keys"; dock->input->phys = dev_name(dev); dock->input->dev.parent = dev; dock->input->id.bustype = BUS_I2C; dock->input->id.vendor = /* USB_VENDOR_ID_ASUSTEK */ dock->input->id.product = /* From TF-103-C */ dock->input->id.version = 0x0100; /* 1.0 */ for (i = 0; i < ARRAY_SIZE(tf103c_dock_toprow_codes); i++) { input_set_capability(dock->input, EV_KEY, tf103c_dock_toprow_codes[i][0]); input_set_capability(dock->input, EV_KEY, tf103c_dock_toprow_codes[i][1]); } input_set_capability(dock->input, EV_KEY, KEY_RIGHTALT); ret = input_register_device(dock->input); if (ret) return ret; /* 4. Create HID device for the keyboard */ dock->hid = hid_allocate_device(); if (IS_ERR(dock->hid)) return dev_err_probe(dev, PTR_ERR(dock->hid), "allocating hid dev\n"); dock->hid->driver_data = dock; dock->hid->ll_driver = &tf103c_dock_hid_ll_driver; dock->hid->dev.parent = &client->dev; dock->hid->bus = BUS_I2C; dock->hid->vendor = 0x0b05; /* USB_VENDOR_ID_ASUSTEK */ dock->hid->product = 0x0103; /* From TF-103-C */ dock->hid->version = 0x0100; /* 1.0 */ strscpy(dock->hid->name, "Asus TF103C Dock Keyboard"); strscpy(dock->hid->phys, dev_name(dev)); ret = hid_add_device(dock->hid); if (ret) return dev_err_probe(dev, ret, "adding hid dev\n"); /* 5. Setup irqchip for touchpad IRQ pass-through */ dock->tp_irqchip.name = KBUILD_MODNAME; dock->tp_irq_domain = irq_domain_add_linear(NULL, 1, &irq_domain_simple_ops, NULL); if (!dock->tp_irq_domain) return -ENOMEM; dock->tp_irq = irq_create_mapping(dock->tp_irq_domain, 0); if (!dock->tp_irq) return -ENOMEM; irq_set_chip_data(dock->tp_irq, dock); irq_set_chip_and_handler(dock->tp_irq, &dock->tp_irqchip, handle_simple_irq); irq_set_nested_thread(dock->tp_irq, true); irq_set_noprobe(dock->tp_irq); dev_info(dev, "Asus TF103C board-revision: %d\n", dock->board_rev); tf103c_dock_start_hpd(dock); device_init_wakeup(dev, true); i2c_set_clientdata(client, dock); return 0; } static void tf103c_dock_remove(struct i2c_client *client) { struct tf103c_dock_data *dock = i2c_get_clientdata(client); tf103c_dock_stop_hpd(dock); tf103c_dock_disable(dock); } static int __maybe_unused tf103c_dock_suspend(struct device *dev) { struct tf103c_dock_data *dock = dev_get_drvdata(dev); tf103c_dock_stop_hpd(dock); if (dock->enabled) { tf103c_dock_ec_cmd(dock, tf103c_dock_suspend_cmd); if (device_may_wakeup(dev)) enable_irq_wake(dock->irq); } return 0; } static int __maybe_unused tf103c_dock_resume(struct device *dev) { struct tf103c_dock_data *dock = dev_get_drvdata(dev); if (dock->enabled) { if (device_may_wakeup(dev)) disable_irq_wake(dock->irq); /* Don't try to resume if the dock was unplugged during suspend */ if (gpiod_get_value(dock->hpd_gpio)) tf103c_dock_ec_cmd(dock, tf103c_dock_enable_cmd); } tf103c_dock_start_hpd(dock); return 0; } static SIMPLE_DEV_PM_OPS(tf103c_dock_pm_ops, tf103c_dock_suspend, tf103c_dock_resume); static const struct acpi_device_id tf103c_dock_acpi_match[] = { {"NPCE69A"}, { } }; MODULE_DEVICE_TABLE(acpi, tf103c_dock_acpi_match); static struct i2c_driver tf103c_dock_driver = { .driver = { .name = "asus-tf103c-dock", .pm = &tf103c_dock_pm_ops, .acpi_match_table = tf103c_dock_acpi_match, }, .probe = tf103c_dock_probe, .remove = tf103c_dock_remove, }; module_i2c_driver(tf103c_dock_driver); MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com"); MODULE_DESCRIPTION("X86 Android tablets DSDT fixups driver"); MODULE_LICENSE("GPL");
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