// SPDX-License-Identifier: GPL-2.0-or-later/* ------------------------------------------------------------------------- * Copyright (C) 2014-2015, Intel Corporation * * Derived from: * gslX68X.c * Copyright (C) 2010-2015, Shanghai Sileadinc Co.Ltd * * ------------------------------------------------------------------------- */ #include <linux/i2c.h>#include <linux/module.h>#include <linux/acpi.h>#include <linux/interrupt.h>#include <linux/gpio/consumer.h>#include <linux/delay.h>#include <linux/firmware.h>#include <linux/input.h>#include <linux/input/mt.h>#include <linux/input/touchscreen.h>#include <linux/pm.h>#include <linux/pm_runtime.h>#include <linux/irq.h>#include <linux/regulator/consumer.h> #include <linux/unaligned.h> #define SILEAD_TS_NAME "silead_ts" #define SILEAD_REG_RESET 0xE0#define SILEAD_REG_DATA 0x80#define SILEAD_REG_TOUCH_NR 0x80#define SILEAD_REG_POWER 0xBC#define SILEAD_REG_CLOCK 0xE4#define SILEAD_REG_STATUS 0xB0#define SILEAD_REG_ID 0xFC#define SILEAD_REG_MEM_CHECK 0xB0 #define SILEAD_STATUS_OK 0x5A5A5A5A#define SILEAD_TS_DATA_LEN 44#define SILEAD_CLOCK 0x04 #define SILEAD_CMD_RESET 0x88#define SILEAD_CMD_START 0x00 #define SILEAD_POINT_DATA_LEN 0x04#define SILEAD_POINT_Y_OFF 0x00#define SILEAD_POINT_Y_MSB_OFF 0x01#define SILEAD_POINT_X_OFF 0x02#define SILEAD_POINT_X_MSB_OFF 0x03#define SILEAD_EXTRA_DATA_MASK 0xF0 #define SILEAD_CMD_SLEEP_MIN 10000#define SILEAD_CMD_SLEEP_MAX 20000#define SILEAD_POWER_SLEEP 20#define SILEAD_STARTUP_SLEEP 30 #define SILEAD_MAX_FINGERS 10 enum silead_ts_power { SILEAD_POWER_ON = 1, SILEAD_POWER_OFF = 0}; struct silead_ts_data { struct i2c_client *client; struct gpio_desc *gpio_power; struct input_dev *input; struct input_dev *pen_input; struct regulator_bulk_data regulators[2]; char fw_name[64]; struct touchscreen_properties prop; u32 chip_id; struct input_mt_pos pos[SILEAD_MAX_FINGERS]; int slots[SILEAD_MAX_FINGERS]; int id[SILEAD_MAX_FINGERS]; u32 efi_fw_min_max[4]; bool efi_fw_min_max_set; bool pen_supported; bool pen_down; u32 pen_x_res; u32 pen_y_res; int pen_up_count;}; struct silead_fw_data { u32 offset; u32 val;}; static void silead_apply_efi_fw_min_max(struct silead_ts_data *data){ struct input_absinfo *absinfo_x = &data->input->absinfo[ABS_MT_POSITION_X]; struct input_absinfo *absinfo_y = &data->input->absinfo[ABS_MT_POSITION_Y]; if (!data->efi_fw_min_max_set) return; absinfo_x->minimum = data->efi_fw_min_max[0]; absinfo_x->maximum = data->efi_fw_min_max[1]; absinfo_y->minimum = data->efi_fw_min_max[2]; absinfo_y->maximum = data->efi_fw_min_max[3]; if (data->prop.invert_x) { absinfo_x->maximum -= absinfo_x->minimum; absinfo_x->minimum = 0; } if (data->prop.invert_y) { absinfo_y->maximum -= absinfo_y->minimum; absinfo_y->minimum = 0; } if (data->prop.swap_x_y) { swap(absinfo_x->minimum, absinfo_y->minimum); swap(absinfo_x->maximum, absinfo_y->maximum); }} static int silead_ts_request_input_dev(struct silead_ts_data *data){ struct device *dev = &data->client->dev; int error; data->input = devm_input_allocate_device(dev); if (!data->input) { dev_err(dev, "Failed to allocate input device\n"); return -ENOMEM; } input_set_abs_params(data->input, ABS_MT_POSITION_X, 0, 4095, 0, 0); input_set_abs_params(data->input, ABS_MT_POSITION_Y, 0, 4095, 0, 0); touchscreen_parse_properties(data->input, true, &data->prop); silead_apply_efi_fw_min_max(data); input_mt_init_slots(data->input, SILEAD_MAX_FINGERS, INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK); if (device_property_read_bool(dev, "silead,home-button")) input_set_capability(data->input, EV_KEY, KEY_LEFTMETA); data->input->name = SILEAD_TS_NAME; data->input->phys = "input/ts"; data->input->id.bustype = BUS_I2C; error = input_register_device(data->input); if (error) { dev_err(dev, "Failed to register input device: %d\n", error); return error; } return 0;} static int silead_ts_request_pen_input_dev(struct silead_ts_data *data){ struct device *dev = &data->client->dev; int error; if (!data->pen_supported) return 0; data->pen_input = devm_input_allocate_device(dev); if (!data->pen_input) return -ENOMEM; input_set_abs_params(data->pen_input, ABS_X, 0, 4095, 0, 0); input_set_abs_params(data->pen_input, ABS_Y, 0, 4095, 0, 0); input_set_capability(data->pen_input, EV_KEY, BTN_TOUCH); input_set_capability(data->pen_input, EV_KEY, BTN_TOOL_PEN); set_bit(INPUT_PROP_DIRECT, data->pen_input->propbit); touchscreen_parse_properties(data->pen_input, false, &data->prop); input_abs_set_res(data->pen_input, ABS_X, data->pen_x_res); input_abs_set_res(data->pen_input, ABS_Y, data->pen_y_res); data->pen_input->name = SILEAD_TS_NAME " pen"; data->pen_input->phys = "input/pen"; data->input->id.bustype = BUS_I2C; error = input_register_device(data->pen_input); if (error) { dev_err(dev, "Failed to register pen input device: %d\n", error); return error; } return 0;} static void silead_ts_set_power(struct i2c_client *client, enum silead_ts_power state){ struct silead_ts_data *data = i2c_get_clientdata(client); if (data->gpio_power) { gpiod_set_value_cansleep(data->gpio_power, state); msleep(SILEAD_POWER_SLEEP); }} static bool silead_ts_handle_pen_data(struct silead_ts_data *data, u8 *buf){ u8 *coord = buf + SILEAD_POINT_DATA_LEN; struct input_mt_pos pos; if (!data->pen_supported || buf[2] != 0x00 || buf[3] != 0x00) return false; if (buf[0] == 0x00 && buf[1] == 0x00 && data->pen_down) { data->pen_up_count++; if (data->pen_up_count == 6) { data->pen_down = false; goto sync; } return true; } if (buf[0] == 0x01 && buf[1] == 0x08) { touchscreen_set_mt_pos(&pos, &data->prop, get_unaligned_le16(&coord[SILEAD_POINT_X_OFF]) & 0xfff, get_unaligned_le16(&coord[SILEAD_POINT_Y_OFF]) & 0xfff); input_report_abs(data->pen_input, ABS_X, pos.x); input_report_abs(data->pen_input, ABS_Y, pos.y); data->pen_up_count = 0; data->pen_down = true; goto sync; } return false; sync: input_report_key(data->pen_input, BTN_TOOL_PEN, data->pen_down); input_report_key(data->pen_input, BTN_TOUCH, data->pen_down); input_sync(data->pen_input); return true;} static void silead_ts_read_data(struct i2c_client *client){ struct silead_ts_data *data = i2c_get_clientdata(client); struct input_dev *input = data->input; struct device *dev = &client->dev; u8 *bufp, buf[SILEAD_TS_DATA_LEN]; int touch_nr, softbutton, error, i; bool softbutton_pressed = false; error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_DATA, SILEAD_TS_DATA_LEN, buf); if (error < 0) { dev_err(dev, "Data read error %d\n", error); return; } if (buf[0] > SILEAD_MAX_FINGERS) { dev_warn(dev, "More touches reported then supported %d > %d\n", buf[0], SILEAD_MAX_FINGERS); buf[0] = SILEAD_MAX_FINGERS; } if (silead_ts_handle_pen_data(data, buf)) goto sync; /* Pen is down, release all previous touches */ touch_nr = 0; bufp = buf + SILEAD_POINT_DATA_LEN; for (i = 0; i < buf[0]; i++, bufp += SILEAD_POINT_DATA_LEN) { softbutton = (bufp[SILEAD_POINT_Y_MSB_OFF] & SILEAD_EXTRA_DATA_MASK) >> 4; if (softbutton) { /* * For now only respond to softbutton == 0x01, some * tablets *without* a capacative button send 0x04 * when crossing the edges of the screen. */ if (softbutton == 0x01) softbutton_pressed = true; continue; } /* * Bits 4-7 are the touch id, note not all models have * hardware touch ids so atm we don't use these. */ data->id[touch_nr] = (bufp[SILEAD_POINT_X_MSB_OFF] & SILEAD_EXTRA_DATA_MASK) >> 4; touchscreen_set_mt_pos(&data->pos[touch_nr], &data->prop, get_unaligned_le16(&bufp[SILEAD_POINT_X_OFF]) & 0xfff, get_unaligned_le16(&bufp[SILEAD_POINT_Y_OFF]) & 0xfff); touch_nr++; } input_mt_assign_slots(input, data->slots, data->pos, touch_nr, 0); for (i = 0; i < touch_nr; i++) { input_mt_slot(input, data->slots[i]); input_mt_report_slot_state(input, MT_TOOL_FINGER, true); input_report_abs(input, ABS_MT_POSITION_X, data->pos[i].x); input_report_abs(input, ABS_MT_POSITION_Y, data->pos[i].y); dev_dbg(dev, "x=%d y=%d hw_id=%d sw_id=%d\n", data->pos[i].x, data->pos[i].y, data->id[i], data->slots[i]); } sync: input_mt_sync_frame(input); input_report_key(input, KEY_LEFTMETA, softbutton_pressed); input_sync(input);} static int silead_ts_init(struct i2c_client *client){ int error; error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, SILEAD_CMD_RESET); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_TOUCH_NR, SILEAD_MAX_FINGERS); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK, SILEAD_CLOCK); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, SILEAD_CMD_START); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); return 0; i2c_write_err: dev_err(&client->dev, "Registers clear error %d\n", error); return error;} static int silead_ts_reset(struct i2c_client *client){ int error; error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, SILEAD_CMD_RESET); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK, SILEAD_CLOCK); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_POWER, SILEAD_CMD_START); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); return 0; i2c_write_err: dev_err(&client->dev, "Chip reset error %d\n", error); return error;} static int silead_ts_startup(struct i2c_client *client){ int error; error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, 0x00); if (error) { dev_err(&client->dev, "Startup error %d\n", error); return error; } msleep(SILEAD_STARTUP_SLEEP); return 0;} static int silead_ts_load_fw(struct i2c_client *client){ struct device *dev = &client->dev; struct silead_ts_data *data = i2c_get_clientdata(client); const struct firmware *fw = NULL; struct silead_fw_data *fw_data; unsigned int fw_size, i; int error; dev_dbg(dev, "Firmware file name: %s", data->fw_name); /* * Unfortunately, at the time of writing this comment, we have been unable to * get permission from Silead, or from device OEMs, to distribute the necessary * Silead firmware files in linux-firmware. * * On a whole bunch of devices the UEFI BIOS code contains a touchscreen driver, * which contains an embedded copy of the firmware. The fw-loader code has a * "platform" fallback mechanism, which together with info on the firmware * from drivers/platform/x86/touchscreen_dmi.c will use the firmware from the * UEFI driver when the firmware is missing from /lib/firmware. This makes the * touchscreen work OOTB without users needing to manually download the firmware. * * The firmware bundled with the original Windows/Android is usually newer then * the firmware in the UEFI driver and it is better calibrated. This better * calibration can lead to significant differences in the reported min/max * coordinates. * * To deal with this we first try to load the firmware without "platform" * fallback. If that fails we retry with "platform" fallback and if that * succeeds we apply an (optional) set of alternative min/max values from the * "silead,efi-fw-min-max" property. */ error = firmware_request_nowarn(&fw, data->fw_name, dev); if (error) { error = firmware_request_platform(&fw, data->fw_name, dev); if (error) { dev_err(dev, "Firmware request error %d\n", error); return error; } error = device_property_read_u32_array(dev, "silead,efi-fw-min-max", data->efi_fw_min_max, ARRAY_SIZE(data->efi_fw_min_max)); if (!error) data->efi_fw_min_max_set = true; /* The EFI (platform) embedded fw does not have pen support */ if (data->pen_supported) { dev_warn(dev, "Warning loading '%s' from filesystem failed, using EFI embedded copy.\n", data->fw_name); dev_warn(dev, "Warning pen support is known to be broken in the EFI embedded fw version\n"); data->pen_supported = false; } } fw_size = fw->size / sizeof(*fw_data); fw_data = (struct silead_fw_data *)fw->data; for (i = 0; i < fw_size; i++) { error = i2c_smbus_write_i2c_block_data(client, fw_data[i].offset, 4, (u8 *)&fw_data[i].val); if (error) { dev_err(dev, "Firmware load error %d\n", error); break; } } release_firmware(fw); return error ?: 0;} static u32 silead_ts_get_status(struct i2c_client *client){ int error; __le32 status; error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_STATUS, sizeof(status), (u8 *)&status); if (error < 0) { dev_err(&client->dev, "Status read error %d\n", error); return error; } return le32_to_cpu(status);} static int silead_ts_get_id(struct i2c_client *client){ struct silead_ts_data *data = i2c_get_clientdata(client); __le32 chip_id; int error; error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_ID, sizeof(chip_id), (u8 *)&chip_id); if (error < 0) return error; data->chip_id = le32_to_cpu(chip_id); dev_info(&client->dev, "Silead chip ID: 0x%8X", data->chip_id); return 0;} static int silead_ts_setup(struct i2c_client *client)Lines 1–500 of 831. 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// SPDX-License-Identifier: GPL-2.0-or-later /* ------------------------------------------------------------------------- * Copyright (C) 2014-2015, Intel Corporation * * Derived from: * gslX68X.c * Copyright (C) 2010-2015, Shanghai Sileadinc Co.Ltd * * ------------------------------------------------------------------------- */ #include <linux/i2c.h> #include <linux/module.h> #include <linux/acpi.h> #include <linux/interrupt.h> #include <linux/gpio/consumer.h> #include <linux/delay.h> #include <linux/firmware.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/input/touchscreen.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/irq.h> #include <linux/regulator/consumer.h> #include <linux/unaligned.h> #define SILEAD_TS_NAME "silead_ts" #define SILEAD_REG_RESET 0xE0 #define SILEAD_REG_DATA 0x80 #define SILEAD_REG_TOUCH_NR 0x80 #define SILEAD_REG_POWER 0xBC #define SILEAD_REG_CLOCK 0xE4 #define SILEAD_REG_STATUS 0xB0 #define SILEAD_REG_ID 0xFC #define SILEAD_REG_MEM_CHECK 0xB0 #define SILEAD_STATUS_OK 0x5A5A5A5A #define SILEAD_TS_DATA_LEN 44 #define SILEAD_CLOCK 0x04 #define SILEAD_CMD_RESET 0x88 #define SILEAD_CMD_START 0x00 #define SILEAD_POINT_DATA_LEN 0x04 #define SILEAD_POINT_Y_OFF 0x00 #define SILEAD_POINT_Y_MSB_OFF 0x01 #define SILEAD_POINT_X_OFF 0x02 #define SILEAD_POINT_X_MSB_OFF 0x03 #define SILEAD_EXTRA_DATA_MASK 0xF0 #define SILEAD_CMD_SLEEP_MIN 10000 #define SILEAD_CMD_SLEEP_MAX 20000 #define SILEAD_POWER_SLEEP 20 #define SILEAD_STARTUP_SLEEP 30 #define SILEAD_MAX_FINGERS 10 enum silead_ts_power { SILEAD_POWER_ON = 1, SILEAD_POWER_OFF = 0 }; struct silead_ts_data { struct i2c_client *client; struct gpio_desc *gpio_power; struct input_dev *input; struct input_dev *pen_input; struct regulator_bulk_data regulators[2]; char fw_name[64]; struct touchscreen_properties prop; u32 chip_id; struct input_mt_pos pos[SILEAD_MAX_FINGERS]; int slots[SILEAD_MAX_FINGERS]; int id[SILEAD_MAX_FINGERS]; u32 efi_fw_min_max[4]; bool efi_fw_min_max_set; bool pen_supported; bool pen_down; u32 pen_x_res; u32 pen_y_res; int pen_up_count; }; struct silead_fw_data { u32 offset; u32 val; }; static void silead_apply_efi_fw_min_max(struct silead_ts_data *data) { struct input_absinfo *absinfo_x = &data->input->absinfo[ABS_MT_POSITION_X]; struct input_absinfo *absinfo_y = &data->input->absinfo[ABS_MT_POSITION_Y]; if (!data->efi_fw_min_max_set) return; absinfo_x->minimum = data->efi_fw_min_max[0]; absinfo_x->maximum = data->efi_fw_min_max[1]; absinfo_y->minimum = data->efi_fw_min_max[2]; absinfo_y->maximum = data->efi_fw_min_max[3]; if (data->prop.invert_x) { absinfo_x->maximum -= absinfo_x->minimum; absinfo_x->minimum = 0; } if (data->prop.invert_y) { absinfo_y->maximum -= absinfo_y->minimum; absinfo_y->minimum = 0; } if (data->prop.swap_x_y) { swap(absinfo_x->minimum, absinfo_y->minimum); swap(absinfo_x->maximum, absinfo_y->maximum); } } static int silead_ts_request_input_dev(struct silead_ts_data *data) { struct device *dev = &data->client->dev; int error; data->input = devm_input_allocate_device(dev); if (!data->input) { dev_err(dev, "Failed to allocate input device\n"); return -ENOMEM; } input_set_abs_params(data->input, ABS_MT_POSITION_X, 0, 4095, 0, 0); input_set_abs_params(data->input, ABS_MT_POSITION_Y, 0, 4095, 0, 0); touchscreen_parse_properties(data->input, true, &data->prop); silead_apply_efi_fw_min_max(data); input_mt_init_slots(data->input, SILEAD_MAX_FINGERS, INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK); if (device_property_read_bool(dev, "silead,home-button")) input_set_capability(data->input, EV_KEY, KEY_LEFTMETA); data->input->name = SILEAD_TS_NAME; data->input->phys = "input/ts"; data->input->id.bustype = BUS_I2C; error = input_register_device(data->input); if (error) { dev_err(dev, "Failed to register input device: %d\n", error); return error; } return 0; } static int silead_ts_request_pen_input_dev(struct silead_ts_data *data) { struct device *dev = &data->client->dev; int error; if (!data->pen_supported) return 0; data->pen_input = devm_input_allocate_device(dev); if (!data->pen_input) return -ENOMEM; input_set_abs_params(data->pen_input, ABS_X, 0, 4095, 0, 0); input_set_abs_params(data->pen_input, ABS_Y, 0, 4095, 0, 0); input_set_capability(data->pen_input, EV_KEY, BTN_TOUCH); input_set_capability(data->pen_input, EV_KEY, BTN_TOOL_PEN); set_bit(INPUT_PROP_DIRECT, data->pen_input->propbit); touchscreen_parse_properties(data->pen_input, false, &data->prop); input_abs_set_res(data->pen_input, ABS_X, data->pen_x_res); input_abs_set_res(data->pen_input, ABS_Y, data->pen_y_res); data->pen_input->name = SILEAD_TS_NAME " pen"; data->pen_input->phys = "input/pen"; data->input->id.bustype = BUS_I2C; error = input_register_device(data->pen_input); if (error) { dev_err(dev, "Failed to register pen input device: %d\n", error); return error; } return 0; } static void silead_ts_set_power(struct i2c_client *client, enum silead_ts_power state) { struct silead_ts_data *data = i2c_get_clientdata(client); if (data->gpio_power) { gpiod_set_value_cansleep(data->gpio_power, state); msleep(SILEAD_POWER_SLEEP); } } static bool silead_ts_handle_pen_data(struct silead_ts_data *data, u8 *buf) { u8 *coord = buf + SILEAD_POINT_DATA_LEN; struct input_mt_pos pos; if (!data->pen_supported || buf[2] != 0x00 || buf[3] != 0x00) return false; if (buf[0] == 0x00 && buf[1] == 0x00 && data->pen_down) { data->pen_up_count++; if (data->pen_up_count == 6) { data->pen_down = false; goto sync; } return true; } if (buf[0] == 0x01 && buf[1] == 0x08) { touchscreen_set_mt_pos(&pos, &data->prop, get_unaligned_le16(&coord[SILEAD_POINT_X_OFF]) & 0xfff, get_unaligned_le16(&coord[SILEAD_POINT_Y_OFF]) & 0xfff); input_report_abs(data->pen_input, ABS_X, pos.x); input_report_abs(data->pen_input, ABS_Y, pos.y); data->pen_up_count = 0; data->pen_down = true; goto sync; } return false; sync: input_report_key(data->pen_input, BTN_TOOL_PEN, data->pen_down); input_report_key(data->pen_input, BTN_TOUCH, data->pen_down); input_sync(data->pen_input); return true; } static void silead_ts_read_data(struct i2c_client *client) { struct silead_ts_data *data = i2c_get_clientdata(client); struct input_dev *input = data->input; struct device *dev = &client->dev; u8 *bufp, buf[SILEAD_TS_DATA_LEN]; int touch_nr, softbutton, error, i; bool softbutton_pressed = false; error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_DATA, SILEAD_TS_DATA_LEN, buf); if (error < 0) { dev_err(dev, "Data read error %d\n", error); return; } if (buf[0] > SILEAD_MAX_FINGERS) { dev_warn(dev, "More touches reported then supported %d > %d\n", buf[0], SILEAD_MAX_FINGERS); buf[0] = SILEAD_MAX_FINGERS; } if (silead_ts_handle_pen_data(data, buf)) goto sync; /* Pen is down, release all previous touches */ touch_nr = 0; bufp = buf + SILEAD_POINT_DATA_LEN; for (i = 0; i < buf[0]; i++, bufp += SILEAD_POINT_DATA_LEN) { softbutton = (bufp[SILEAD_POINT_Y_MSB_OFF] & SILEAD_EXTRA_DATA_MASK) >> 4; if (softbutton) { /* * For now only respond to softbutton == 0x01, some * tablets *without* a capacative button send 0x04 * when crossing the edges of the screen. */ if (softbutton == 0x01) softbutton_pressed = true; continue; } /* * Bits 4-7 are the touch id, note not all models have * hardware touch ids so atm we don't use these. */ data->id[touch_nr] = (bufp[SILEAD_POINT_X_MSB_OFF] & SILEAD_EXTRA_DATA_MASK) >> 4; touchscreen_set_mt_pos(&data->pos[touch_nr], &data->prop, get_unaligned_le16(&bufp[SILEAD_POINT_X_OFF]) & 0xfff, get_unaligned_le16(&bufp[SILEAD_POINT_Y_OFF]) & 0xfff); touch_nr++; } input_mt_assign_slots(input, data->slots, data->pos, touch_nr, 0); for (i = 0; i < touch_nr; i++) { input_mt_slot(input, data->slots[i]); input_mt_report_slot_state(input, MT_TOOL_FINGER, true); input_report_abs(input, ABS_MT_POSITION_X, data->pos[i].x); input_report_abs(input, ABS_MT_POSITION_Y, data->pos[i].y); dev_dbg(dev, "x=%d y=%d hw_id=%d sw_id=%d\n", data->pos[i].x, data->pos[i].y, data->id[i], data->slots[i]); } sync: input_mt_sync_frame(input); input_report_key(input, KEY_LEFTMETA, softbutton_pressed); input_sync(input); } static int silead_ts_init(struct i2c_client *client) { int error; error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, SILEAD_CMD_RESET); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_TOUCH_NR, SILEAD_MAX_FINGERS); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK, SILEAD_CLOCK); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, SILEAD_CMD_START); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); return 0; i2c_write_err: dev_err(&client->dev, "Registers clear error %d\n", error); return error; } static int silead_ts_reset(struct i2c_client *client) { int error; error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, SILEAD_CMD_RESET); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK, SILEAD_CLOCK); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); error = i2c_smbus_write_byte_data(client, SILEAD_REG_POWER, SILEAD_CMD_START); if (error) goto i2c_write_err; usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX); return 0; i2c_write_err: dev_err(&client->dev, "Chip reset error %d\n", error); return error; } static int silead_ts_startup(struct i2c_client *client) { int error; error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, 0x00); if (error) { dev_err(&client->dev, "Startup error %d\n", error); return error; } msleep(SILEAD_STARTUP_SLEEP); return 0; } static int silead_ts_load_fw(struct i2c_client *client) { struct device *dev = &client->dev; struct silead_ts_data *data = i2c_get_clientdata(client); const struct firmware *fw = NULL; struct silead_fw_data *fw_data; unsigned int fw_size, i; int error; dev_dbg(dev, "Firmware file name: %s", data->fw_name); /* * Unfortunately, at the time of writing this comment, we have been unable to * get permission from Silead, or from device OEMs, to distribute the necessary * Silead firmware files in linux-firmware. * * On a whole bunch of devices the UEFI BIOS code contains a touchscreen driver, * which contains an embedded copy of the firmware. The fw-loader code has a * "platform" fallback mechanism, which together with info on the firmware * from drivers/platform/x86/touchscreen_dmi.c will use the firmware from the * UEFI driver when the firmware is missing from /lib/firmware. This makes the * touchscreen work OOTB without users needing to manually download the firmware. * * The firmware bundled with the original Windows/Android is usually newer then * the firmware in the UEFI driver and it is better calibrated. This better * calibration can lead to significant differences in the reported min/max * coordinates. * * To deal with this we first try to load the firmware without "platform" * fallback. If that fails we retry with "platform" fallback and if that * succeeds we apply an (optional) set of alternative min/max values from the * "silead,efi-fw-min-max" property. */ error = firmware_request_nowarn(&fw, data->fw_name, dev); if (error) { error = firmware_request_platform(&fw, data->fw_name, dev); if (error) { dev_err(dev, "Firmware request error %d\n", error); return error; } error = device_property_read_u32_array(dev, "silead,efi-fw-min-max", data->efi_fw_min_max, ARRAY_SIZE(data->efi_fw_min_max)); if (!error) data->efi_fw_min_max_set = true; /* The EFI (platform) embedded fw does not have pen support */ if (data->pen_supported) { dev_warn(dev, "Warning loading '%s' from filesystem failed, using EFI embedded copy.\n", data->fw_name); dev_warn(dev, "Warning pen support is known to be broken in the EFI embedded fw version\n"); data->pen_supported = false; } } fw_size = fw->size / sizeof(*fw_data); fw_data = (struct silead_fw_data *)fw->data; for (i = 0; i < fw_size; i++) { error = i2c_smbus_write_i2c_block_data(client, fw_data[i].offset, 4, (u8 *)&fw_data[i].val); if (error) { dev_err(dev, "Firmware load error %d\n", error); break; } } release_firmware(fw); return error ?: 0; } static u32 silead_ts_get_status(struct i2c_client *client) { int error; __le32 status; error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_STATUS, sizeof(status), (u8 *)&status); if (error < 0) { dev_err(&client->dev, "Status read error %d\n", error); return error; } return le32_to_cpu(status); } static int silead_ts_get_id(struct i2c_client *client) { struct silead_ts_data *data = i2c_get_clientdata(client); __le32 chip_id; int error; error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_ID, sizeof(chip_id), (u8 *)&chip_id); if (error < 0) return error; data->chip_id = le32_to_cpu(chip_id); dev_info(&client->dev, "Silead chip ID: 0x%8X", data->chip_id); return 0; } static int silead_ts_setup(struct i2c_client *client)