// SPDX-License-Identifier: GPL-2.0-only /* * Raydium touchscreen I2C driver. * * Copyright (C) 2012-2014, Raydium Semiconductor Corporation. * * Raydium reserves the right to make changes without further notice * to the materials described herein. Raydium does not assume any * liability arising out of the application described herein. * * Contact Raydium Semiconductor Corporation at www.rad-ic.com */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* Slave I2C mode */ #define RM_BOOT_BLDR 0x02 #define RM_BOOT_MAIN 0x03 /* I2C bootoloader commands */ #define RM_CMD_BOOT_PAGE_WRT 0x0B /* send bl page write */ #define RM_CMD_BOOT_WRT 0x11 /* send bl write */ #define RM_CMD_BOOT_ACK 0x22 /* send ack*/ #define RM_CMD_BOOT_CHK 0x33 /* send data check */ #define RM_CMD_BOOT_READ 0x44 /* send wait bl data ready*/ #define RM_BOOT_RDY 0xFF /* bl data ready */ /* I2C main commands */ #define RM_CMD_QUERY_BANK 0x2B #define RM_CMD_DATA_BANK 0x4D #define RM_CMD_ENTER_SLEEP 0x4E #define RM_CMD_BANK_SWITCH 0xAA #define RM_RESET_MSG_ADDR 0x40000004 #define RM_MAX_READ_SIZE 56 #define RM_PACKET_CRC_SIZE 2 /* Touch relative info */ #define RM_MAX_RETRIES 3 #define RM_MAX_TOUCH_NUM 10 #define RM_BOOT_DELAY_MS 100 /* Offsets in contact data */ #define RM_CONTACT_STATE_POS 0 #define RM_CONTACT_X_POS 1 #define RM_CONTACT_Y_POS 3 #define RM_CONTACT_PRESSURE_POS 5 #define RM_CONTACT_WIDTH_X_POS 6 #define RM_CONTACT_WIDTH_Y_POS 7 /* Bootloader relative info */ #define RM_BL_WRT_CMD_SIZE 3 /* bl flash wrt cmd size */ #define RM_BL_WRT_PKG_SIZE 32 /* bl wrt pkg size */ #define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE) #define RM_FW_PAGE_SIZE 128 #define RM_MAX_FW_RETRIES 30 #define RM_MAX_FW_SIZE 0xD000 #define RM_POWERON_DELAY_USEC 500 #define RM_RESET_DELAY_MSEC 50 enum raydium_bl_cmd { BL_HEADER = 0, BL_PAGE_STR, BL_PKG_IDX, BL_DATA_STR, }; enum raydium_bl_ack { RAYDIUM_ACK_NULL = 0, RAYDIUM_WAIT_READY, RAYDIUM_PATH_READY, }; enum raydium_boot_mode { RAYDIUM_TS_MAIN = 0, RAYDIUM_TS_BLDR, }; /* Response to RM_CMD_DATA_BANK request */ struct raydium_data_info { __le32 data_bank_addr; u8 pkg_size; u8 tp_info_size; }; struct raydium_info { __le32 hw_ver; /*device version */ u8 main_ver; u8 sub_ver; __le16 ft_ver; /* test version */ u8 x_num; u8 y_num; __le16 x_max; __le16 y_max; u8 x_res; /* units/mm */ u8 y_res; /* units/mm */ }; /* struct raydium_data - represents state of Raydium touchscreen device */ struct raydium_data { struct i2c_client *client; struct input_dev *input; struct regulator *avdd; struct regulator *vccio; struct gpio_desc *reset_gpio; struct raydium_info info; struct mutex sysfs_mutex; u8 *report_data; u32 data_bank_addr; u8 report_size; u8 contact_size; u8 pkg_size; enum raydium_boot_mode boot_mode; bool wake_irq_enabled; }; static int raydium_i2c_send(struct i2c_client *client, u8 addr, const void *data, size_t len) { u8 *buf; int tries = 0; int ret; buf = kmalloc(len + 1, GFP_KERNEL); if (!buf) return -ENOMEM; buf[0] = addr; memcpy(buf + 1, data, len); do { ret = i2c_master_send(client, buf, len + 1); if (likely(ret == len + 1)) break; msleep(20); } while (++tries < RM_MAX_RETRIES); kfree(buf); if (unlikely(ret != len + 1)) { if (ret >= 0) ret = -EIO; dev_err(&client->dev, "%s failed: %d\n", __func__, ret); return ret; } return 0; } static int raydium_i2c_read(struct i2c_client *client, u8 addr, void *data, size_t len) { struct i2c_msg xfer[] = { { .addr = client->addr, .len = 1, .buf = &addr, }, { .addr = client->addr, .flags = I2C_M_RD, .len = len, .buf = data, } }; int ret; ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer)); if (unlikely(ret != ARRAY_SIZE(xfer))) return ret < 0 ? ret : -EIO; return 0; } static int raydium_i2c_read_message(struct i2c_client *client, u32 addr, void *data, size_t len) { __be32 be_addr; size_t xfer_len; int error; while (len) { xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE); be_addr = cpu_to_be32(addr); error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH, &be_addr, sizeof(be_addr)); if (!error) error = raydium_i2c_read(client, addr & 0xff, data, xfer_len); if (error) return error; len -= xfer_len; data += xfer_len; addr += xfer_len; } return 0; } static int raydium_i2c_send_message(struct i2c_client *client, u32 addr, const void *data, size_t len) { __be32 be_addr = cpu_to_be32(addr); int error; error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH, &be_addr, sizeof(be_addr)); if (!error) error = raydium_i2c_send(client, addr & 0xff, data, len); return error; } static int raydium_i2c_sw_reset(struct i2c_client *client) { const u8 soft_rst_cmd = 0x01; int error; error = raydium_i2c_send_message(client, RM_RESET_MSG_ADDR, &soft_rst_cmd, sizeof(soft_rst_cmd)); if (error) { dev_err(&client->dev, "software reset failed: %d\n", error); return error; } msleep(RM_RESET_DELAY_MSEC); return 0; } static int raydium_i2c_query_ts_info(struct raydium_data *ts) { struct i2c_client *client = ts->client; struct raydium_data_info data_info; __le32 query_bank_addr; int error, retry_cnt; for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) { error = raydium_i2c_read(client, RM_CMD_DATA_BANK, &data_info, sizeof(data_info)); if (error) continue; /* * Warn user if we already allocated memory for reports and * then the size changed (due to firmware update?) and keep * old size instead. */ if (ts->report_data && ts->pkg_size != data_info.pkg_size) { dev_warn(&client->dev, "report size changes, was: %d, new: %d\n", ts->pkg_size, data_info.pkg_size); } else { ts->pkg_size = data_info.pkg_size; ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE; } ts->contact_size = data_info.tp_info_size; ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr); dev_dbg(&client->dev, "data_bank_addr: %#08x, report_size: %d, contact_size: %d\n", ts->data_bank_addr, ts->report_size, ts->contact_size); error = raydium_i2c_read(client, RM_CMD_QUERY_BANK, &query_bank_addr, sizeof(query_bank_addr)); if (error) continue; error = raydium_i2c_read_message(client, le32_to_cpu(query_bank_addr), &ts->info, sizeof(ts->info)); if (error) continue; return 0; } dev_err(&client->dev, "failed to query device parameters: %d\n", error); return error; } static int raydium_i2c_check_fw_status(struct raydium_data *ts) { struct i2c_client *client = ts->client; static const u8 bl_ack = 0x62; static const u8 main_ack = 0x66; u8 buf[4]; int error; error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf)); if (!error) { if (buf[0] == bl_ack) ts->boot_mode = RAYDIUM_TS_BLDR; else if (buf[0] == main_ack) ts->boot_mode = RAYDIUM_TS_MAIN; return 0; } return error; } static int raydium_i2c_initialize(struct raydium_data *ts) { struct i2c_client *client = ts->client; int error, retry_cnt; for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) { /* Wait for Hello packet */ msleep(RM_BOOT_DELAY_MS); error = raydium_i2c_check_fw_status(ts); if (error) { dev_err(&client->dev, "failed to read 'hello' packet: %d\n", error); continue; } if (ts->boot_mode == RAYDIUM_TS_BLDR || ts->boot_mode == RAYDIUM_TS_MAIN) { break; } } if (error) ts->boot_mode = RAYDIUM_TS_BLDR; if (ts->boot_mode == RAYDIUM_TS_BLDR) { ts->info.hw_ver = cpu_to_le32(0xffffffffUL); ts->info.main_ver = 0xff; ts->info.sub_ver = 0xff; } else { raydium_i2c_query_ts_info(ts); } return error; } static int raydium_i2c_bl_chk_state(struct i2c_client *client, enum raydium_bl_ack state) { static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 }; u8 rbuf[sizeof(ack_ok)]; u8 retry; int error; for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) { switch (state) { case RAYDIUM_ACK_NULL: return 0; case RAYDIUM_WAIT_READY: error = raydium_i2c_read(client, RM_CMD_BOOT_CHK, &rbuf[0], 1); if (!error && rbuf[0] == RM_BOOT_RDY) return 0; break; case RAYDIUM_PATH_READY: error = raydium_i2c_read(client, RM_CMD_BOOT_CHK, rbuf, sizeof(rbuf)); if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok))) return 0; break; default: dev_err(&client->dev, "%s: invalid target state %d\n", __func__, state); return -EINVAL; } msleep(20); } return -ETIMEDOUT; } static int raydium_i2c_write_object(struct i2c_client *client, const void *data, size_t len, enum raydium_bl_ack state) { int error; error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len); if (error) { dev_err(&client->dev, "WRT obj command failed: %d\n", error); return error; } error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, NULL, 0); if (error) { dev_err(&client->dev, "Ack obj command failed: %d\n", error); return error; } error = raydium_i2c_bl_chk_state(client, state); if (error) { dev_err(&client->dev, "BL check state failed: %d\n", error); return error; } return 0; } static bool raydium_i2c_boot_trigger(struct i2c_client *client) { static const u8 cmd[7][6] = { { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 }, { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 }, { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 }, { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 }, { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 }, { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 }, { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 }, }; int i; int error; for (i = 0; i < 7; i++) { error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]), RAYDIUM_WAIT_READY); if (error) { dev_err(&client->dev, "boot trigger failed at step %d: %d\n", i, error); return error; } } return false; } static bool raydium_i2c_fw_trigger(struct i2c_client *client) { static const u8 cmd[5][11] = { { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 }, { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 }, { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 }, { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 }, { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 }, }; int i; int error; for (i = 0; i < 5; i++) { error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]), RAYDIUM_ACK_NULL); if (error) { dev_err(&client->dev, "fw trigger failed at step %d: %d\n", i, error); return error; } } return false; } static int raydium_i2c_check_path(struct i2c_client *client) { static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 }; int error; error = raydium_i2c_write_object(client, cmd, sizeof(cmd), RAYDIUM_PATH_READY); if (error) { dev_err(&client->dev, "check path command failed: %d\n", error); return error; } return 0; } static int raydium_i2c_enter_bl(struct i2c_client *client) { static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 }; int error; error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd), RAYDIUM_ACK_NULL); if (error) { dev_err(&client->dev, "enter bl command failed: %d\n", error); return error; } msleep(RM_BOOT_DELAY_MS); return 0; } static int raydium_i2c_leave_bl(struct i2c_client *client) { static const u8 leave_cmd[] = { 0x05, 0x00 }; int error; error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd), RAYDIUM_ACK_NULL); if (error) { dev_err(&client->dev, "leave bl command failed: %d\n", error); return error; } msleep(RM_BOOT_DELAY_MS); return 0; } static int raydium_i2c_write_checksum(struct i2c_client *client, size_t length, u16 checksum) { u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 }; int error; put_unaligned_le16(length, &checksum_cmd[3]); put_unaligned_le16(checksum, &checksum_cmd[5]); error = raydium_i2c_write_object(client, checksum_cmd, sizeof(checksum_cmd), RAYDIUM_ACK_NULL); if (error) { dev_err(&client->dev, "failed to write checksum: %d\n", error); return error; } return 0; } static int raydium_i2c_disable_watch_dog(struct i2c_client *client) { static const u8 cmd[] = { 0x0A, 0xAA }; int error; error = raydium_i2c_write_object(client, cmd, sizeof(cmd), RAYDIUM_WAIT_READY); if (error) { dev_err(&client->dev, "disable watchdog command failed: %d\n", error); return error; } return 0; } static int raydium_i2c_fw_write_page(struct i2c_client *client, u16 page_idx, const void *data, size_t len) { u8 buf[RM_BL_WRT_LEN]; size_t xfer_len; int error; int i; BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0); for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) { buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT; buf[BL_PAGE_STR] = page_idx ? 0xff : 0; buf[BL_PKG_IDX] = i + 1; xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE); memcpy(&buf[BL_DATA_STR], data, xfer_len); if (len < RM_BL_WRT_PKG_SIZE) memset(&buf[BL_DATA_STR + xfer_len], 0xff, RM_BL_WRT_PKG_SIZE - xfer_len); error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN, RAYDIUM_WAIT_READY); if (error) { dev_err(&client->dev, "page write command failed for page %d, chunk %d: %d\n", page_idx, i, error); return error; } data += xfer_len; len -= xfer_len; } return error; } static u16 raydium_calc_chksum(const u8 *buf, u16 len) { u16 checksum = 0; u16 i; for (i = 0; i < len; i++) checksum += buf[i]; return checksum; } static int raydium_i2c_do_update_firmware(struct raydium_data *ts, const struct firmware *fw) { struct i2c_client *client = ts->client; const void *data; size_t data_len; size_t len; int page_nr; int i; int error; u16 fw_checksum; if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) { dev_err(&client->dev, "Invalid firmware length\n"); return -EINVAL; } error = raydium_i2c_check_fw_status(ts); if (error) { dev_err(&client->dev, "Unable to access IC %d\n", error); return error; } if (ts->boot_mode == RAYDIUM_TS_MAIN) { for (i = 0; i < RM_MAX_RETRIES; i++) { error = raydium_i2c_enter_bl(client); if (!error) { error = raydium_i2c_check_fw_status(ts); if (error) { dev_err(&client->dev, "unable to access IC: %d\n", error); return error; } if (ts->boot_mode == RAYDIUM_TS_BLDR) break; } } if (ts->boot_mode == RAYDIUM_TS_MAIN) { dev_err(&client->dev, "failed to jump to boot loader: %d\n", error); return -EIO; } } error = raydium_i2c_disable_watch_dog(client); if (error) return error; error = raydium_i2c_check_path(client); if (error) return error; error = raydium_i2c_boot_trigger(client); if (error) { dev_err(&client->dev, "send boot trigger fail: %d\n", error); return error; } msleep(RM_BOOT_DELAY_MS); data = fw->data; data_len = fw->size; page_nr = 0; while (data_len) { len = min_t(size_t, data_len, RM_FW_PAGE_SIZE); error = raydium_i2c_fw_write_page(client, page_nr++, data, len); if (error) return error; msleep(20); data += len; data_len -= len; } error = raydium_i2c_leave_bl(client); if (error) { dev_err(&client->dev, "failed to leave boot loader: %d\n", error); return error; } dev_dbg(&client->dev, "left boot loader mode\n"); msleep(RM_BOOT_DELAY_MS); error = raydium_i2c_check_fw_status(ts); if (error) { dev_err(&client->dev, "failed to check fw status after write: %d\n", error); return error; } if (ts->boot_mode != RAYDIUM_TS_MAIN) { dev_err(&client->dev, "failed to switch to main fw after writing firmware: %d\n", error); return -EINVAL; } error = raydium_i2c_fw_trigger(client); if (error) { dev_err(&client->dev, "failed to trigger fw: %d\n", error); return error; } fw_checksum = raydium_calc_chksum(fw->data, fw->size); error = raydium_i2c_write_checksum(client, fw->size, fw_checksum); if (error) return error; return 0; } static int raydium_i2c_fw_update(struct raydium_data *ts) { struct i2c_client *client = ts->client; const struct firmware *fw = NULL; char *fw_file; int error; fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw", le32_to_cpu(ts->info.hw_ver)); if (!fw_file) return -ENOMEM; dev_dbg(&client->dev, "firmware name: %s\n", fw_file); error = request_firmware(&fw, fw_file, &client->dev); if (error) { dev_err(&client->dev, "Unable to open firmware %s\n", fw_file); goto out_free_fw_file; } disable_irq(client->irq); error = raydium_i2c_do_update_firmware(ts, fw); if (error) { dev_err(&client->dev, "firmware update failed: %d\n", error); ts->boot_mode = RAYDIUM_TS_BLDR; goto out_enable_irq; } error = raydium_i2c_initialize(ts); if (error) { dev_err(&client->dev, "failed to initialize device after firmware update: %d\n", error); ts->boot_mode = RAYDIUM_TS_BLDR; goto out_enable_irq; } ts->boot_mode = RAYDIUM_TS_MAIN; out_enable_irq: enable_irq(client->irq); msleep(100); release_firmware(fw); out_free_fw_file: kfree(fw_file); return error; } static void raydium_mt_event(struct raydium_data *ts) { int i; for (i = 0; i < ts->report_size / ts->contact_size; i++) { u8 *contact = &ts->report_data[ts->contact_size * i]; bool state = contact[RM_CONTACT_STATE_POS]; u8 wx, wy; input_mt_slot(ts->input, i); input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state); if (!state) continue; input_report_abs(ts->input, ABS_MT_POSITION_X, get_unaligned_le16(&contact[RM_CONTACT_X_POS])); input_report_abs(ts->input, ABS_MT_POSITION_Y, get_unaligned_le16(&contact[RM_CONTACT_Y_POS])); input_report_abs(ts->input, ABS_MT_PRESSURE, contact[RM_CONTACT_PRESSURE_POS]); wx = contact[RM_CONTACT_WIDTH_X_POS]; wy = contact[RM_CONTACT_WIDTH_Y_POS]; input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy)); input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy)); } input_mt_sync_frame(ts->input); input_sync(ts->input); } static irqreturn_t raydium_i2c_irq(int irq, void *_dev) { struct raydium_data *ts = _dev; int error; u16 fw_crc; u16 calc_crc; if (ts->boot_mode != RAYDIUM_TS_MAIN) goto out; error = raydium_i2c_read_message(ts->client, ts->data_bank_addr, ts->report_data, ts->pkg_size); if (error) goto out; fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]); calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size); if (unlikely(fw_crc != calc_crc)) { dev_warn(&ts->client->dev, "%s: invalid packet crc %#04x vs %#04x\n", __func__, calc_crc, fw_crc); goto out; } raydium_mt_event(ts); out: return IRQ_HANDLED; } static ssize_t raydium_i2c_fw_ver_show(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct raydium_data *ts = i2c_get_clientdata(client); return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver); } static ssize_t raydium_i2c_hw_ver_show(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct raydium_data *ts = i2c_get_clientdata(client); return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver)); } static ssize_t raydium_i2c_boot_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct raydium_data *ts = i2c_get_clientdata(client); return sprintf(buf, "%s\n", ts->boot_mode == RAYDIUM_TS_MAIN ? "Normal" : "Recovery"); } static ssize_t raydium_i2c_update_fw_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct raydium_data *ts = i2c_get_clientdata(client); int error; error = mutex_lock_interruptible(&ts->sysfs_mutex); if (error) return error; error = raydium_i2c_fw_update(ts); mutex_unlock(&ts->sysfs_mutex); return error ?: count; } static ssize_t raydium_i2c_calibrate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct raydium_data *ts = i2c_get_clientdata(client); static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E }; int error; error = mutex_lock_interruptible(&ts->sysfs_mutex); if (error) return error; error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd), RAYDIUM_WAIT_READY); if (error) dev_err(&client->dev, "calibrate command failed: %d\n", error); mutex_unlock(&ts->sysfs_mutex); return error ?: count; } static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL); static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL); static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL); static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store); static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store); static struct attribute *raydium_i2c_attributes[] = { &dev_attr_update_fw.attr, &dev_attr_boot_mode.attr, &dev_attr_fw_version.attr, &dev_attr_hw_version.attr, &dev_attr_calibrate.attr, NULL }; static const struct attribute_group raydium_i2c_attribute_group = { .attrs = raydium_i2c_attributes, }; static int raydium_i2c_power_on(struct raydium_data *ts) { int error; if (!ts->reset_gpio) return 0; gpiod_set_value_cansleep(ts->reset_gpio, 1); error = regulator_enable(ts->avdd); if (error) { dev_err(&ts->client->dev, "failed to enable avdd regulator: %d\n", error); goto release_reset_gpio; } error = regulator_enable(ts->vccio); if (error) { regulator_disable(ts->avdd); dev_err(&ts->client->dev, "failed to enable vccio regulator: %d\n", error); goto release_reset_gpio; } udelay(RM_POWERON_DELAY_USEC); release_reset_gpio: gpiod_set_value_cansleep(ts->reset_gpio, 0); if (error) return error; msleep(RM_RESET_DELAY_MSEC); return 0; } static void raydium_i2c_power_off(void *_data) { struct raydium_data *ts = _data; if (ts->reset_gpio) { gpiod_set_value_cansleep(ts->reset_gpio, 1); regulator_disable(ts->vccio); regulator_disable(ts->avdd); } } static int raydium_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { union i2c_smbus_data dummy; struct raydium_data *ts; int error; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { dev_err(&client->dev, "i2c check functionality error (need I2C_FUNC_I2C)\n"); return -ENXIO; } ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); if (!ts) return -ENOMEM; mutex_init(&ts->sysfs_mutex); ts->client = client; i2c_set_clientdata(client, ts); ts->avdd = devm_regulator_get(&client->dev, "avdd"); if (IS_ERR(ts->avdd)) { error = PTR_ERR(ts->avdd); if (error != -EPROBE_DEFER) dev_err(&client->dev, "Failed to get 'avdd' regulator: %d\n", error); return error; } ts->vccio = devm_regulator_get(&client->dev, "vccio"); if (IS_ERR(ts->vccio)) { error = PTR_ERR(ts->vccio); if (error != -EPROBE_DEFER) dev_err(&client->dev, "Failed to get 'vccio' regulator: %d\n", error); return error; } ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(ts->reset_gpio)) { error = PTR_ERR(ts->reset_gpio); if (error != -EPROBE_DEFER) dev_err(&client->dev, "failed to get reset gpio: %d\n", error); return error; } error = raydium_i2c_power_on(ts); if (error) return error; error = devm_add_action(&client->dev, raydium_i2c_power_off, ts); if (error) { dev_err(&client->dev, "failed to install power off action: %d\n", error); raydium_i2c_power_off(ts); return error; } /* Make sure there is something at this address */ if (i2c_smbus_xfer(client->adapter, client->addr, 0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { dev_err(&client->dev, "nothing at this address\n"); return -ENXIO; } error = raydium_i2c_initialize(ts); if (error) { dev_err(&client->dev, "failed to initialize: %d\n", error); return error; } ts->report_data = devm_kmalloc(&client->dev, ts->pkg_size, GFP_KERNEL); if (!ts->report_data) return -ENOMEM; ts->input = devm_input_allocate_device(&client->dev); if (!ts->input) { dev_err(&client->dev, "Failed to allocate input device\n"); return -ENOMEM; } ts->input->name = "Raydium Touchscreen"; ts->input->id.bustype = BUS_I2C; input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, le16_to_cpu(ts->info.x_max), 0, 0); input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, le16_to_cpu(ts->info.y_max), 0, 0); input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res); input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res); input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0); error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM, INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); if (error) { dev_err(&client->dev, "failed to initialize MT slots: %d\n", error); return error; } error = input_register_device(ts->input); if (error) { dev_err(&client->dev, "unable to register input device: %d\n", error); return error; } error = devm_request_threaded_irq(&client->dev, client->irq, NULL, raydium_i2c_irq, IRQF_ONESHOT, client->name, ts); if (error) { dev_err(&client->dev, "Failed to register interrupt\n"); return error; } error = devm_device_add_group(&client->dev, &raydium_i2c_attribute_group); if (error) { dev_err(&client->dev, "failed to create sysfs attributes: %d\n", error); return error; } return 0; } static void __maybe_unused raydium_enter_sleep(struct i2c_client *client) { static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f }; int error; error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP, sleep_cmd, sizeof(sleep_cmd)); if (error) dev_err(&client->dev, "sleep command failed: %d\n", error); } static int __maybe_unused raydium_i2c_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct raydium_data *ts = i2c_get_clientdata(client); /* Sleep is not available in BLDR recovery mode */ if (ts->boot_mode != RAYDIUM_TS_MAIN) return -EBUSY; disable_irq(client->irq); if (device_may_wakeup(dev)) { raydium_enter_sleep(client); ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0); } else { raydium_i2c_power_off(ts); } return 0; } static int __maybe_unused raydium_i2c_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct raydium_data *ts = i2c_get_clientdata(client); if (device_may_wakeup(dev)) { if (ts->wake_irq_enabled) disable_irq_wake(client->irq); raydium_i2c_sw_reset(client); } else { raydium_i2c_power_on(ts); raydium_i2c_initialize(ts); } enable_irq(client->irq); return 0; } static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops, raydium_i2c_suspend, raydium_i2c_resume); static const struct i2c_device_id raydium_i2c_id[] = { { "raydium_i2c" , 0 }, { "rm32380", 0 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(i2c, raydium_i2c_id); #ifdef CONFIG_ACPI static const struct acpi_device_id raydium_acpi_id[] = { { "RAYD0001", 0 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(acpi, raydium_acpi_id); #endif #ifdef CONFIG_OF static const struct of_device_id raydium_of_match[] = { { .compatible = "raydium,rm32380", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, raydium_of_match); #endif static struct i2c_driver raydium_i2c_driver = { .probe = raydium_i2c_probe, .id_table = raydium_i2c_id, .driver = { .name = "raydium_ts", .pm = &raydium_i2c_pm_ops, .acpi_match_table = ACPI_PTR(raydium_acpi_id), .of_match_table = of_match_ptr(raydium_of_match), }, }; module_i2c_driver(raydium_i2c_driver); MODULE_AUTHOR("Raydium"); MODULE_DESCRIPTION("Raydium I2c Touchscreen driver"); MODULE_LICENSE("GPL v2");