| // 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 <linux/acpi.h> |
| #include <linux/delay.h> |
| #include <linux/firmware.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/i2c.h> |
| #include <linux/input.h> |
| #include <linux/input/mt.h> |
| #include <linux/interrupt.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/slab.h> |
| #include <asm/unaligned.h> |
| |
| /* 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_RETRY_DELAY_MS 20 |
| #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; |
| }; |
| |
| /* |
| * Header to be sent for RM_CMD_BANK_SWITCH command. This is used by |
| * raydium_i2c_{read|send} below. |
| */ |
| struct __packed raydium_bank_switch_header { |
| u8 cmd; |
| __be32 be_addr; |
| }; |
| |
| static int raydium_i2c_xfer(struct i2c_client *client, u32 addr, |
| struct i2c_msg *xfer, size_t xfer_count) |
| { |
| int ret; |
| /* |
| * If address is greater than 255, then RM_CMD_BANK_SWITCH needs to be |
| * sent first. Else, skip the header i.e. xfer[0]. |
| */ |
| int xfer_start_idx = (addr > 0xff) ? 0 : 1; |
| xfer_count -= xfer_start_idx; |
| |
| ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count); |
| if (likely(ret == xfer_count)) |
| return 0; |
| |
| return ret < 0 ? ret : -EIO; |
| } |
| |
| static int raydium_i2c_send(struct i2c_client *client, |
| u32 addr, const void *data, size_t len) |
| { |
| int tries = 0; |
| int error; |
| u8 *tx_buf; |
| u8 reg_addr = addr & 0xff; |
| |
| tx_buf = kmalloc(len + 1, GFP_KERNEL); |
| if (!tx_buf) |
| return -ENOMEM; |
| |
| tx_buf[0] = reg_addr; |
| memcpy(tx_buf + 1, data, len); |
| |
| do { |
| struct raydium_bank_switch_header header = { |
| .cmd = RM_CMD_BANK_SWITCH, |
| .be_addr = cpu_to_be32(addr), |
| }; |
| |
| /* |
| * Perform as a single i2c_transfer transaction to ensure that |
| * no other I2C transactions are initiated on the bus to any |
| * other device in between. Initiating transacations to other |
| * devices after RM_CMD_BANK_SWITCH is sent is known to cause |
| * issues. This is also why regmap infrastructure cannot be used |
| * for this driver. Regmap handles page(bank) switch and reads |
| * as separate i2c_transfer() operations. This can result in |
| * problems if the Raydium device is on a shared I2C bus. |
| */ |
| struct i2c_msg xfer[] = { |
| { |
| .addr = client->addr, |
| .len = sizeof(header), |
| .buf = (u8 *)&header, |
| }, |
| { |
| .addr = client->addr, |
| .len = len + 1, |
| .buf = tx_buf, |
| }, |
| }; |
| |
| error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer)); |
| if (likely(!error)) |
| return 0; |
| |
| msleep(RM_RETRY_DELAY_MS); |
| } while (++tries < RM_MAX_RETRIES); |
| |
| dev_err(&client->dev, "%s failed: %d\n", __func__, error); |
| return error; |
| } |
| |
| static int raydium_i2c_read(struct i2c_client *client, |
| u32 addr, void *data, size_t len) |
| { |
| int error; |
| |
| while (len) { |
| u8 reg_addr = addr & 0xff; |
| struct raydium_bank_switch_header header = { |
| .cmd = RM_CMD_BANK_SWITCH, |
| .be_addr = cpu_to_be32(addr), |
| }; |
| size_t xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE); |
| |
| /* |
| * Perform as a single i2c_transfer transaction to ensure that |
| * no other I2C transactions are initiated on the bus to any |
| * other device in between. Initiating transacations to other |
| * devices after RM_CMD_BANK_SWITCH is sent is known to cause |
| * issues. This is also why regmap infrastructure cannot be used |
| * for this driver. Regmap handles page(bank) switch and writes |
| * as separate i2c_transfer() operations. This can result in |
| * problems if the Raydium device is on a shared I2C bus. |
| */ |
| struct i2c_msg xfer[] = { |
| { |
| .addr = client->addr, |
| .len = sizeof(header), |
| .buf = (u8 *)&header, |
| }, |
| { |
| .addr = client->addr, |
| .len = 1, |
| .buf = ®_addr, |
| }, |
| { |
| .addr = client->addr, |
| .len = xfer_len, |
| .buf = data, |
| .flags = I2C_M_RD, |
| } |
| }; |
| |
| error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer)); |
| if (unlikely(error)) |
| return error; |
| |
| len -= xfer_len; |
| data += xfer_len; |
| addr += xfer_len; |
| } |
| |
| return 0; |
| } |
| |
| static int raydium_i2c_sw_reset(struct i2c_client *client) |
| { |
| const u8 soft_rst_cmd = 0x01; |
| int error; |
| |
| error = raydium_i2c_send(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(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 int 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 0; |
| } |
| |
| static int 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 0; |
| } |
| |
| 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(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"); |