16ccb1d8fSSangwon Jee /* 26ccb1d8fSSangwon Jee * MELFAS MIP4 Touchscreen 36ccb1d8fSSangwon Jee * 46ccb1d8fSSangwon Jee * Copyright (C) 2016 MELFAS Inc. 56ccb1d8fSSangwon Jee * 66ccb1d8fSSangwon Jee * Author : Sangwon Jee <jeesw@melfas.com> 76ccb1d8fSSangwon Jee * 86ccb1d8fSSangwon Jee * This program is free software; you can redistribute it and/or 96ccb1d8fSSangwon Jee * modify it under the terms of the GNU General Public License 106ccb1d8fSSangwon Jee * as published by the Free Software Foundation; either version 2 116ccb1d8fSSangwon Jee * of the License, or (at your option) any later version. 126ccb1d8fSSangwon Jee * 136ccb1d8fSSangwon Jee * This program is distributed in the hope that it will be useful, 146ccb1d8fSSangwon Jee * but WITHOUT ANY WARRANTY; without even the implied warranty of 156ccb1d8fSSangwon Jee * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 166ccb1d8fSSangwon Jee * GNU General Public License for more details. 176ccb1d8fSSangwon Jee */ 186ccb1d8fSSangwon Jee 196ccb1d8fSSangwon Jee #include <linux/acpi.h> 206ccb1d8fSSangwon Jee #include <linux/delay.h> 216ccb1d8fSSangwon Jee #include <linux/firmware.h> 226ccb1d8fSSangwon Jee #include <linux/gpio/consumer.h> 236ccb1d8fSSangwon Jee #include <linux/i2c.h> 246ccb1d8fSSangwon Jee #include <linux/input.h> 256ccb1d8fSSangwon Jee #include <linux/input/mt.h> 266ccb1d8fSSangwon Jee #include <linux/interrupt.h> 276ccb1d8fSSangwon Jee #include <linux/module.h> 286ccb1d8fSSangwon Jee #include <linux/of.h> 296ccb1d8fSSangwon Jee #include <linux/slab.h> 306ccb1d8fSSangwon Jee #include <asm/unaligned.h> 316ccb1d8fSSangwon Jee 326ccb1d8fSSangwon Jee #define MIP4_DEVICE_NAME "mip4_ts" 336ccb1d8fSSangwon Jee 346ccb1d8fSSangwon Jee /***************************************************************** 356ccb1d8fSSangwon Jee * Protocol 36e2aad666SSangwon Jee * Version : MIP 4.0 Rev 5.4 376ccb1d8fSSangwon Jee *****************************************************************/ 386ccb1d8fSSangwon Jee 396ccb1d8fSSangwon Jee /* Address */ 406ccb1d8fSSangwon Jee #define MIP4_R0_BOOT 0x00 416ccb1d8fSSangwon Jee #define MIP4_R1_BOOT_MODE 0x01 426ccb1d8fSSangwon Jee #define MIP4_R1_BOOT_BUF_ADDR 0x10 436ccb1d8fSSangwon Jee #define MIP4_R1_BOOT_STATUS 0x20 446ccb1d8fSSangwon Jee #define MIP4_R1_BOOT_CMD 0x30 456ccb1d8fSSangwon Jee #define MIP4_R1_BOOT_TARGET_ADDR 0x40 466ccb1d8fSSangwon Jee #define MIP4_R1_BOOT_SIZE 0x44 476ccb1d8fSSangwon Jee 486ccb1d8fSSangwon Jee #define MIP4_R0_INFO 0x01 496ccb1d8fSSangwon Jee #define MIP4_R1_INFO_PRODUCT_NAME 0x00 506ccb1d8fSSangwon Jee #define MIP4_R1_INFO_RESOLUTION_X 0x10 516ccb1d8fSSangwon Jee #define MIP4_R1_INFO_RESOLUTION_Y 0x12 526ccb1d8fSSangwon Jee #define MIP4_R1_INFO_NODE_NUM_X 0x14 536ccb1d8fSSangwon Jee #define MIP4_R1_INFO_NODE_NUM_Y 0x15 546ccb1d8fSSangwon Jee #define MIP4_R1_INFO_KEY_NUM 0x16 557a3ed686SSangwon Jee #define MIP4_R1_INFO_PRESSURE_NUM 0x17 567a3ed686SSangwon Jee #define MIP4_R1_INFO_LENGTH_X 0x18 577a3ed686SSangwon Jee #define MIP4_R1_INFO_LENGTH_Y 0x1A 587a3ed686SSangwon Jee #define MIP4_R1_INFO_PPM_X 0x1C 597a3ed686SSangwon Jee #define MIP4_R1_INFO_PPM_Y 0x1D 606ccb1d8fSSangwon Jee #define MIP4_R1_INFO_VERSION_BOOT 0x20 616ccb1d8fSSangwon Jee #define MIP4_R1_INFO_VERSION_CORE 0x22 626ccb1d8fSSangwon Jee #define MIP4_R1_INFO_VERSION_APP 0x24 636ccb1d8fSSangwon Jee #define MIP4_R1_INFO_VERSION_PARAM 0x26 646ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_BOOT_START 0x30 656ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_BOOT_END 0x31 666ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_CORE_START 0x32 676ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_CORE_END 0x33 686ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_APP_START 0x34 696ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_APP_END 0x35 706ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_PARAM_START 0x36 716ccb1d8fSSangwon Jee #define MIP4_R1_INFO_SECT_PARAM_END 0x37 726ccb1d8fSSangwon Jee #define MIP4_R1_INFO_BUILD_DATE 0x40 736ccb1d8fSSangwon Jee #define MIP4_R1_INFO_BUILD_TIME 0x44 746ccb1d8fSSangwon Jee #define MIP4_R1_INFO_CHECKSUM_PRECALC 0x48 756ccb1d8fSSangwon Jee #define MIP4_R1_INFO_CHECKSUM_REALTIME 0x4A 766ccb1d8fSSangwon Jee #define MIP4_R1_INFO_PROTOCOL_NAME 0x50 776ccb1d8fSSangwon Jee #define MIP4_R1_INFO_PROTOCOL_VERSION 0x58 786ccb1d8fSSangwon Jee #define MIP4_R1_INFO_IC_ID 0x70 796ccb1d8fSSangwon Jee #define MIP4_R1_INFO_IC_NAME 0x71 806ccb1d8fSSangwon Jee #define MIP4_R1_INFO_IC_VENDOR_ID 0x75 816ccb1d8fSSangwon Jee #define MIP4_R1_INFO_IC_HW_CATEGORY 0x77 826ccb1d8fSSangwon Jee #define MIP4_R1_INFO_CONTACT_THD_SCR 0x78 836ccb1d8fSSangwon Jee #define MIP4_R1_INFO_CONTACT_THD_KEY 0x7A 84e2aad666SSangwon Jee #define MIP4_R1_INFO_PID 0x7C 85e2aad666SSangwon Jee #define MIP4_R1_INFO_VID 0x7E 86e2aad666SSangwon Jee #define MIP4_R1_INFO_SLAVE_ADDR 0x80 876ccb1d8fSSangwon Jee 886ccb1d8fSSangwon Jee #define MIP4_R0_EVENT 0x02 896ccb1d8fSSangwon Jee #define MIP4_R1_EVENT_SUPPORTED_FUNC 0x00 906ccb1d8fSSangwon Jee #define MIP4_R1_EVENT_FORMAT 0x04 916ccb1d8fSSangwon Jee #define MIP4_R1_EVENT_SIZE 0x06 926ccb1d8fSSangwon Jee #define MIP4_R1_EVENT_PACKET_INFO 0x10 936ccb1d8fSSangwon Jee #define MIP4_R1_EVENT_PACKET_DATA 0x11 946ccb1d8fSSangwon Jee 956ccb1d8fSSangwon Jee #define MIP4_R0_CTRL 0x06 966ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_READY_STATUS 0x00 976ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_EVENT_READY 0x01 986ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_MODE 0x10 996ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_EVENT_TRIGGER_TYPE 0x11 1006ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_RECALIBRATE 0x12 1016ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_POWER_STATE 0x13 1026ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_GESTURE_TYPE 0x14 1036ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_DISABLE_ESD_ALERT 0x18 1046ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_CHARGER_MODE 0x19 1056ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_HIGH_SENS_MODE 0x1A 1066ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_WINDOW_MODE 0x1B 1076ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_PALM_REJECTION 0x1C 1086ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_EDGE_CORRECTION 0x1D 1096ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_ENTER_GLOVE_MODE 0x1E 1106ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_I2C_ON_LPM 0x1F 1116ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_GESTURE_DEBUG 0x20 1126ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_PALM_EVENT 0x22 1136ccb1d8fSSangwon Jee #define MIP4_R1_CTRL_PROXIMITY_SENSING 0x23 1146ccb1d8fSSangwon Jee 1156ccb1d8fSSangwon Jee /* Value */ 1166ccb1d8fSSangwon Jee #define MIP4_BOOT_MODE_BOOT 0x01 1176ccb1d8fSSangwon Jee #define MIP4_BOOT_MODE_APP 0x02 1186ccb1d8fSSangwon Jee 1196ccb1d8fSSangwon Jee #define MIP4_BOOT_STATUS_BUSY 0x05 1206ccb1d8fSSangwon Jee #define MIP4_BOOT_STATUS_ERROR 0x0E 1216ccb1d8fSSangwon Jee #define MIP4_BOOT_STATUS_DONE 0xA0 1226ccb1d8fSSangwon Jee 1236ccb1d8fSSangwon Jee #define MIP4_BOOT_CMD_MASS_ERASE 0x15 1246ccb1d8fSSangwon Jee #define MIP4_BOOT_CMD_PROGRAM 0x54 1256ccb1d8fSSangwon Jee #define MIP4_BOOT_CMD_ERASE 0x8F 1266ccb1d8fSSangwon Jee #define MIP4_BOOT_CMD_WRITE 0xA5 1276ccb1d8fSSangwon Jee #define MIP4_BOOT_CMD_READ 0xC2 1286ccb1d8fSSangwon Jee 1296ccb1d8fSSangwon Jee #define MIP4_EVENT_INPUT_TYPE_KEY 0 1306ccb1d8fSSangwon Jee #define MIP4_EVENT_INPUT_TYPE_SCREEN 1 1316ccb1d8fSSangwon Jee #define MIP4_EVENT_INPUT_TYPE_PROXIMITY 2 1326ccb1d8fSSangwon Jee 1336ccb1d8fSSangwon Jee #define I2C_RETRY_COUNT 3 /* 2~ */ 1346ccb1d8fSSangwon Jee 1356ccb1d8fSSangwon Jee #define MIP4_BUF_SIZE 128 1366ccb1d8fSSangwon Jee #define MIP4_MAX_FINGERS 10 1376ccb1d8fSSangwon Jee #define MIP4_MAX_KEYS 4 1386ccb1d8fSSangwon Jee 1396ccb1d8fSSangwon Jee #define MIP4_TOUCH_MAJOR_MIN 0 1406ccb1d8fSSangwon Jee #define MIP4_TOUCH_MAJOR_MAX 255 1416ccb1d8fSSangwon Jee #define MIP4_TOUCH_MINOR_MIN 0 1426ccb1d8fSSangwon Jee #define MIP4_TOUCH_MINOR_MAX 255 1436ccb1d8fSSangwon Jee #define MIP4_PRESSURE_MIN 0 1446ccb1d8fSSangwon Jee #define MIP4_PRESSURE_MAX 255 1456ccb1d8fSSangwon Jee 1466ccb1d8fSSangwon Jee #define MIP4_FW_NAME "melfas_mip4.fw" 1476ccb1d8fSSangwon Jee #define MIP4_FW_UPDATE_DEBUG 0 /* 0 (default) or 1 */ 1486ccb1d8fSSangwon Jee 1496ccb1d8fSSangwon Jee struct mip4_fw_version { 1506ccb1d8fSSangwon Jee u16 boot; 1516ccb1d8fSSangwon Jee u16 core; 1526ccb1d8fSSangwon Jee u16 app; 1536ccb1d8fSSangwon Jee u16 param; 1546ccb1d8fSSangwon Jee }; 1556ccb1d8fSSangwon Jee 1566ccb1d8fSSangwon Jee struct mip4_ts { 1576ccb1d8fSSangwon Jee struct i2c_client *client; 1586ccb1d8fSSangwon Jee struct input_dev *input; 1596ccb1d8fSSangwon Jee struct gpio_desc *gpio_ce; 1606ccb1d8fSSangwon Jee 1616ccb1d8fSSangwon Jee char phys[32]; 1626ccb1d8fSSangwon Jee char product_name[16]; 163e2aad666SSangwon Jee u16 product_id; 1644e1bff07SSangwon Jee char ic_name[4]; 165c2c4ba82SSangwon Jee char fw_name[32]; 1666ccb1d8fSSangwon Jee 1676ccb1d8fSSangwon Jee unsigned int max_x; 1686ccb1d8fSSangwon Jee unsigned int max_y; 1696ccb1d8fSSangwon Jee u8 node_x; 1706ccb1d8fSSangwon Jee u8 node_y; 1716ccb1d8fSSangwon Jee u8 node_key; 1727a3ed686SSangwon Jee unsigned int ppm_x; 1737a3ed686SSangwon Jee unsigned int ppm_y; 1746ccb1d8fSSangwon Jee 1756ccb1d8fSSangwon Jee struct mip4_fw_version fw_version; 1766ccb1d8fSSangwon Jee 1776ccb1d8fSSangwon Jee unsigned int event_size; 1786ccb1d8fSSangwon Jee unsigned int event_format; 1796ccb1d8fSSangwon Jee 1806ccb1d8fSSangwon Jee unsigned int key_num; 1816ccb1d8fSSangwon Jee unsigned short key_code[MIP4_MAX_KEYS]; 1826ccb1d8fSSangwon Jee 1836ccb1d8fSSangwon Jee bool wake_irq_enabled; 1846ccb1d8fSSangwon Jee 1856ccb1d8fSSangwon Jee u8 buf[MIP4_BUF_SIZE]; 1866ccb1d8fSSangwon Jee }; 1876ccb1d8fSSangwon Jee 1886ccb1d8fSSangwon Jee static int mip4_i2c_xfer(struct mip4_ts *ts, 1896ccb1d8fSSangwon Jee char *write_buf, unsigned int write_len, 1906ccb1d8fSSangwon Jee char *read_buf, unsigned int read_len) 1916ccb1d8fSSangwon Jee { 1926ccb1d8fSSangwon Jee struct i2c_msg msg[] = { 1936ccb1d8fSSangwon Jee { 1946ccb1d8fSSangwon Jee .addr = ts->client->addr, 1956ccb1d8fSSangwon Jee .flags = 0, 1966ccb1d8fSSangwon Jee .buf = write_buf, 1976ccb1d8fSSangwon Jee .len = write_len, 1986ccb1d8fSSangwon Jee }, { 1996ccb1d8fSSangwon Jee .addr = ts->client->addr, 2006ccb1d8fSSangwon Jee .flags = I2C_M_RD, 2016ccb1d8fSSangwon Jee .buf = read_buf, 2026ccb1d8fSSangwon Jee .len = read_len, 2036ccb1d8fSSangwon Jee }, 2046ccb1d8fSSangwon Jee }; 2056ccb1d8fSSangwon Jee int retry = I2C_RETRY_COUNT; 2066ccb1d8fSSangwon Jee int res; 2076ccb1d8fSSangwon Jee int error; 2086ccb1d8fSSangwon Jee 2096ccb1d8fSSangwon Jee do { 2106ccb1d8fSSangwon Jee res = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); 2116ccb1d8fSSangwon Jee if (res == ARRAY_SIZE(msg)) 2126ccb1d8fSSangwon Jee return 0; 2136ccb1d8fSSangwon Jee 2146ccb1d8fSSangwon Jee error = res < 0 ? res : -EIO; 2156ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 2166ccb1d8fSSangwon Jee "%s - i2c_transfer failed: %d (%d)\n", 2176ccb1d8fSSangwon Jee __func__, error, res); 2186ccb1d8fSSangwon Jee } while (--retry); 2196ccb1d8fSSangwon Jee 2206ccb1d8fSSangwon Jee return error; 2216ccb1d8fSSangwon Jee } 2226ccb1d8fSSangwon Jee 2236ccb1d8fSSangwon Jee static void mip4_parse_fw_version(const u8 *buf, struct mip4_fw_version *v) 2246ccb1d8fSSangwon Jee { 2256ccb1d8fSSangwon Jee v->boot = get_unaligned_le16(buf + 0); 2266ccb1d8fSSangwon Jee v->core = get_unaligned_le16(buf + 2); 2276ccb1d8fSSangwon Jee v->app = get_unaligned_le16(buf + 4); 2286ccb1d8fSSangwon Jee v->param = get_unaligned_le16(buf + 6); 2296ccb1d8fSSangwon Jee } 2306ccb1d8fSSangwon Jee 2316ccb1d8fSSangwon Jee /* 2326ccb1d8fSSangwon Jee * Read chip firmware version 2336ccb1d8fSSangwon Jee */ 2346ccb1d8fSSangwon Jee static int mip4_get_fw_version(struct mip4_ts *ts) 2356ccb1d8fSSangwon Jee { 2366ccb1d8fSSangwon Jee u8 cmd[] = { MIP4_R0_INFO, MIP4_R1_INFO_VERSION_BOOT }; 2376ccb1d8fSSangwon Jee u8 buf[sizeof(ts->fw_version)]; 2386ccb1d8fSSangwon Jee int error; 2396ccb1d8fSSangwon Jee 2406ccb1d8fSSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, sizeof(buf)); 2416ccb1d8fSSangwon Jee if (error) { 2426ccb1d8fSSangwon Jee memset(&ts->fw_version, 0xff, sizeof(ts->fw_version)); 2436ccb1d8fSSangwon Jee return error; 2446ccb1d8fSSangwon Jee } 2456ccb1d8fSSangwon Jee 2466ccb1d8fSSangwon Jee mip4_parse_fw_version(buf, &ts->fw_version); 2476ccb1d8fSSangwon Jee 2486ccb1d8fSSangwon Jee return 0; 2496ccb1d8fSSangwon Jee } 2506ccb1d8fSSangwon Jee 2516ccb1d8fSSangwon Jee /* 2526ccb1d8fSSangwon Jee * Fetch device characteristics 2536ccb1d8fSSangwon Jee */ 2546ccb1d8fSSangwon Jee static int mip4_query_device(struct mip4_ts *ts) 2556ccb1d8fSSangwon Jee { 2564896fb13SDmitry Torokhov union i2c_smbus_data dummy; 2576ccb1d8fSSangwon Jee int error; 2586ccb1d8fSSangwon Jee u8 cmd[2]; 2597a3ed686SSangwon Jee u8 buf[14]; 2606ccb1d8fSSangwon Jee 2614896fb13SDmitry Torokhov /* 2624896fb13SDmitry Torokhov * Make sure there is something at this address as we do not 2634896fb13SDmitry Torokhov * consider subsequent failures as fatal. 2644896fb13SDmitry Torokhov */ 2654896fb13SDmitry Torokhov if (i2c_smbus_xfer(ts->client->adapter, ts->client->addr, 2664896fb13SDmitry Torokhov 0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { 2674896fb13SDmitry Torokhov dev_err(&ts->client->dev, "nothing at this address\n"); 2684896fb13SDmitry Torokhov return -ENXIO; 2694896fb13SDmitry Torokhov } 2704896fb13SDmitry Torokhov 2716ccb1d8fSSangwon Jee /* Product name */ 2726ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_INFO; 2736ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_INFO_PRODUCT_NAME; 2746ccb1d8fSSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), 2756ccb1d8fSSangwon Jee ts->product_name, sizeof(ts->product_name)); 2766ccb1d8fSSangwon Jee if (error) 2776ccb1d8fSSangwon Jee dev_warn(&ts->client->dev, 2786ccb1d8fSSangwon Jee "Failed to retrieve product name: %d\n", error); 2796ccb1d8fSSangwon Jee else 2806ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "product name: %.*s\n", 2816ccb1d8fSSangwon Jee (int)sizeof(ts->product_name), ts->product_name); 2826ccb1d8fSSangwon Jee 283e2aad666SSangwon Jee /* Product ID */ 284e2aad666SSangwon Jee cmd[0] = MIP4_R0_INFO; 285e2aad666SSangwon Jee cmd[1] = MIP4_R1_INFO_PID; 286e2aad666SSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 2); 287e2aad666SSangwon Jee if (error) { 288e2aad666SSangwon Jee dev_warn(&ts->client->dev, 289e2aad666SSangwon Jee "Failed to retrieve product id: %d\n", error); 290e2aad666SSangwon Jee } else { 291e2aad666SSangwon Jee ts->product_id = get_unaligned_le16(&buf[0]); 292e2aad666SSangwon Jee dev_dbg(&ts->client->dev, "product id: %04X\n", ts->product_id); 293e2aad666SSangwon Jee } 294e2aad666SSangwon Jee 295c2c4ba82SSangwon Jee /* Firmware name */ 296c2c4ba82SSangwon Jee snprintf(ts->fw_name, sizeof(ts->fw_name), 297c2c4ba82SSangwon Jee "melfas_mip4_%04X.fw", ts->product_id); 298c2c4ba82SSangwon Jee dev_dbg(&ts->client->dev, "firmware name: %s\n", ts->fw_name); 299c2c4ba82SSangwon Jee 3004e1bff07SSangwon Jee /* IC name */ 3014e1bff07SSangwon Jee cmd[0] = MIP4_R0_INFO; 3024e1bff07SSangwon Jee cmd[1] = MIP4_R1_INFO_IC_NAME; 3034e1bff07SSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), 3044e1bff07SSangwon Jee ts->ic_name, sizeof(ts->ic_name)); 3054e1bff07SSangwon Jee if (error) 3064e1bff07SSangwon Jee dev_warn(&ts->client->dev, 3074e1bff07SSangwon Jee "Failed to retrieve IC name: %d\n", error); 3084e1bff07SSangwon Jee else 3094e1bff07SSangwon Jee dev_dbg(&ts->client->dev, "IC name: %.*s\n", 3104e1bff07SSangwon Jee (int)sizeof(ts->ic_name), ts->ic_name); 3114e1bff07SSangwon Jee 3126ccb1d8fSSangwon Jee /* Firmware version */ 3136ccb1d8fSSangwon Jee error = mip4_get_fw_version(ts); 3146ccb1d8fSSangwon Jee if (error) 3156ccb1d8fSSangwon Jee dev_warn(&ts->client->dev, 3166ccb1d8fSSangwon Jee "Failed to retrieve FW version: %d\n", error); 3176ccb1d8fSSangwon Jee else 3186ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "F/W Version: %04X %04X %04X %04X\n", 3196ccb1d8fSSangwon Jee ts->fw_version.boot, ts->fw_version.core, 3206ccb1d8fSSangwon Jee ts->fw_version.app, ts->fw_version.param); 3216ccb1d8fSSangwon Jee 3226ccb1d8fSSangwon Jee /* Resolution */ 3236ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_INFO; 3246ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_INFO_RESOLUTION_X; 3257a3ed686SSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 14); 3266ccb1d8fSSangwon Jee if (error) { 3276ccb1d8fSSangwon Jee dev_warn(&ts->client->dev, 3286ccb1d8fSSangwon Jee "Failed to retrieve touchscreen parameters: %d\n", 3296ccb1d8fSSangwon Jee error); 3306ccb1d8fSSangwon Jee } else { 3316ccb1d8fSSangwon Jee ts->max_x = get_unaligned_le16(&buf[0]); 3326ccb1d8fSSangwon Jee ts->max_y = get_unaligned_le16(&buf[2]); 3336ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "max_x: %d, max_y: %d\n", 3346ccb1d8fSSangwon Jee ts->max_x, ts->max_y); 3356ccb1d8fSSangwon Jee 3366ccb1d8fSSangwon Jee ts->node_x = buf[4]; 3376ccb1d8fSSangwon Jee ts->node_y = buf[5]; 3386ccb1d8fSSangwon Jee ts->node_key = buf[6]; 3396ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 3406ccb1d8fSSangwon Jee "node_x: %d, node_y: %d, node_key: %d\n", 3416ccb1d8fSSangwon Jee ts->node_x, ts->node_y, ts->node_key); 3426ccb1d8fSSangwon Jee 3437a3ed686SSangwon Jee ts->ppm_x = buf[12]; 3447a3ed686SSangwon Jee ts->ppm_y = buf[13]; 3457a3ed686SSangwon Jee dev_dbg(&ts->client->dev, "ppm_x: %d, ppm_y: %d\n", 3467a3ed686SSangwon Jee ts->ppm_x, ts->ppm_y); 3477a3ed686SSangwon Jee 3486ccb1d8fSSangwon Jee /* Key ts */ 3496ccb1d8fSSangwon Jee if (ts->node_key > 0) 3506ccb1d8fSSangwon Jee ts->key_num = ts->node_key; 3516ccb1d8fSSangwon Jee } 3526ccb1d8fSSangwon Jee 3536ccb1d8fSSangwon Jee /* Protocol */ 3546ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_EVENT; 3556ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_EVENT_SUPPORTED_FUNC; 3566ccb1d8fSSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 7); 3576ccb1d8fSSangwon Jee if (error) { 3586ccb1d8fSSangwon Jee dev_warn(&ts->client->dev, 3596ccb1d8fSSangwon Jee "Failed to retrieve device type: %d\n", error); 3606ccb1d8fSSangwon Jee ts->event_format = 0xff; 3616ccb1d8fSSangwon Jee } else { 3626ccb1d8fSSangwon Jee ts->event_format = get_unaligned_le16(&buf[4]); 3636ccb1d8fSSangwon Jee ts->event_size = buf[6]; 3646ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "event_format: %d, event_size: %d\n", 3656ccb1d8fSSangwon Jee ts->event_format, ts->event_size); 3666ccb1d8fSSangwon Jee 3676ccb1d8fSSangwon Jee if (ts->event_format == 2 || ts->event_format > 3) 3686ccb1d8fSSangwon Jee dev_warn(&ts->client->dev, 3696ccb1d8fSSangwon Jee "Unknown event format %d\n", ts->event_format); 3706ccb1d8fSSangwon Jee } 3716ccb1d8fSSangwon Jee 3726ccb1d8fSSangwon Jee return 0; 3736ccb1d8fSSangwon Jee } 3746ccb1d8fSSangwon Jee 3756ccb1d8fSSangwon Jee static int mip4_power_on(struct mip4_ts *ts) 3766ccb1d8fSSangwon Jee { 3776ccb1d8fSSangwon Jee if (ts->gpio_ce) { 3786ccb1d8fSSangwon Jee gpiod_set_value_cansleep(ts->gpio_ce, 1); 3796ccb1d8fSSangwon Jee 3806ccb1d8fSSangwon Jee /* Booting delay : 200~300ms */ 3816ccb1d8fSSangwon Jee usleep_range(200 * 1000, 300 * 1000); 3826ccb1d8fSSangwon Jee } 3836ccb1d8fSSangwon Jee 3846ccb1d8fSSangwon Jee return 0; 3856ccb1d8fSSangwon Jee } 3866ccb1d8fSSangwon Jee 3876ccb1d8fSSangwon Jee static void mip4_power_off(struct mip4_ts *ts) 3886ccb1d8fSSangwon Jee { 3896ccb1d8fSSangwon Jee if (ts->gpio_ce) 3906ccb1d8fSSangwon Jee gpiod_set_value_cansleep(ts->gpio_ce, 0); 3916ccb1d8fSSangwon Jee } 3926ccb1d8fSSangwon Jee 3936ccb1d8fSSangwon Jee /* 3946ccb1d8fSSangwon Jee * Clear touch input event status 3956ccb1d8fSSangwon Jee */ 3966ccb1d8fSSangwon Jee static void mip4_clear_input(struct mip4_ts *ts) 3976ccb1d8fSSangwon Jee { 3986ccb1d8fSSangwon Jee int i; 3996ccb1d8fSSangwon Jee 4006ccb1d8fSSangwon Jee /* Screen */ 4016ccb1d8fSSangwon Jee for (i = 0; i < MIP4_MAX_FINGERS; i++) { 4026ccb1d8fSSangwon Jee input_mt_slot(ts->input, i); 4036ccb1d8fSSangwon Jee input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0); 4046ccb1d8fSSangwon Jee } 4056ccb1d8fSSangwon Jee 4066ccb1d8fSSangwon Jee /* Keys */ 4076ccb1d8fSSangwon Jee for (i = 0; i < ts->key_num; i++) 4086ccb1d8fSSangwon Jee input_report_key(ts->input, ts->key_code[i], 0); 4096ccb1d8fSSangwon Jee 4106ccb1d8fSSangwon Jee input_sync(ts->input); 4116ccb1d8fSSangwon Jee } 4126ccb1d8fSSangwon Jee 4136ccb1d8fSSangwon Jee static int mip4_enable(struct mip4_ts *ts) 4146ccb1d8fSSangwon Jee { 4156ccb1d8fSSangwon Jee int error; 4166ccb1d8fSSangwon Jee 4176ccb1d8fSSangwon Jee error = mip4_power_on(ts); 4186ccb1d8fSSangwon Jee if (error) 4196ccb1d8fSSangwon Jee return error; 4206ccb1d8fSSangwon Jee 4216ccb1d8fSSangwon Jee enable_irq(ts->client->irq); 4226ccb1d8fSSangwon Jee 4236ccb1d8fSSangwon Jee return 0; 4246ccb1d8fSSangwon Jee } 4256ccb1d8fSSangwon Jee 4266ccb1d8fSSangwon Jee static void mip4_disable(struct mip4_ts *ts) 4276ccb1d8fSSangwon Jee { 4286ccb1d8fSSangwon Jee disable_irq(ts->client->irq); 4296ccb1d8fSSangwon Jee 4306ccb1d8fSSangwon Jee mip4_power_off(ts); 4316ccb1d8fSSangwon Jee 4326ccb1d8fSSangwon Jee mip4_clear_input(ts); 4336ccb1d8fSSangwon Jee } 4346ccb1d8fSSangwon Jee 4356ccb1d8fSSangwon Jee /***************************************************************** 4366ccb1d8fSSangwon Jee * Input handling 4376ccb1d8fSSangwon Jee *****************************************************************/ 4386ccb1d8fSSangwon Jee 4396ccb1d8fSSangwon Jee static void mip4_report_keys(struct mip4_ts *ts, u8 *packet) 4406ccb1d8fSSangwon Jee { 4416ccb1d8fSSangwon Jee u8 key; 4426ccb1d8fSSangwon Jee bool down; 4436ccb1d8fSSangwon Jee 4446ccb1d8fSSangwon Jee switch (ts->event_format) { 4456ccb1d8fSSangwon Jee case 0: 4466ccb1d8fSSangwon Jee case 1: 4476ccb1d8fSSangwon Jee key = packet[0] & 0x0F; 4486ccb1d8fSSangwon Jee down = packet[0] & 0x80; 4496ccb1d8fSSangwon Jee break; 4506ccb1d8fSSangwon Jee 4516ccb1d8fSSangwon Jee case 3: 4526ccb1d8fSSangwon Jee default: 4536ccb1d8fSSangwon Jee key = packet[0] & 0x0F; 4546ccb1d8fSSangwon Jee down = packet[1] & 0x01; 4556ccb1d8fSSangwon Jee break; 4566ccb1d8fSSangwon Jee } 4576ccb1d8fSSangwon Jee 4586ccb1d8fSSangwon Jee /* Report key event */ 4596ccb1d8fSSangwon Jee if (key >= 1 && key <= ts->key_num) { 4606ccb1d8fSSangwon Jee unsigned short keycode = ts->key_code[key - 1]; 4616ccb1d8fSSangwon Jee 4626ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 4636ccb1d8fSSangwon Jee "Key - ID: %d, keycode: %d, state: %d\n", 4646ccb1d8fSSangwon Jee key, keycode, down); 4656ccb1d8fSSangwon Jee 4666ccb1d8fSSangwon Jee input_event(ts->input, EV_MSC, MSC_SCAN, keycode); 4676ccb1d8fSSangwon Jee input_report_key(ts->input, keycode, down); 4686ccb1d8fSSangwon Jee 4696ccb1d8fSSangwon Jee } else { 4706ccb1d8fSSangwon Jee dev_err(&ts->client->dev, "Unknown key: %d\n", key); 4716ccb1d8fSSangwon Jee } 4726ccb1d8fSSangwon Jee } 4736ccb1d8fSSangwon Jee 4746ccb1d8fSSangwon Jee static void mip4_report_touch(struct mip4_ts *ts, u8 *packet) 4756ccb1d8fSSangwon Jee { 4766ccb1d8fSSangwon Jee int id; 4776ccb1d8fSSangwon Jee bool hover; 4786ccb1d8fSSangwon Jee bool palm; 4796ccb1d8fSSangwon Jee bool state; 4806ccb1d8fSSangwon Jee u16 x, y; 4816ccb1d8fSSangwon Jee u8 pressure_stage = 0; 4826ccb1d8fSSangwon Jee u8 pressure; 4836ccb1d8fSSangwon Jee u8 size; 4846ccb1d8fSSangwon Jee u8 touch_major; 4856ccb1d8fSSangwon Jee u8 touch_minor; 4866ccb1d8fSSangwon Jee 4876ccb1d8fSSangwon Jee switch (ts->event_format) { 4886ccb1d8fSSangwon Jee case 0: 4896ccb1d8fSSangwon Jee case 1: 4906ccb1d8fSSangwon Jee /* Touch only */ 4916ccb1d8fSSangwon Jee state = packet[0] & BIT(7); 4926ccb1d8fSSangwon Jee hover = packet[0] & BIT(5); 4936ccb1d8fSSangwon Jee palm = packet[0] & BIT(4); 4946ccb1d8fSSangwon Jee id = (packet[0] & 0x0F) - 1; 4956ccb1d8fSSangwon Jee x = ((packet[1] & 0x0F) << 8) | packet[2]; 4966ccb1d8fSSangwon Jee y = (((packet[1] >> 4) & 0x0F) << 8) | 4976ccb1d8fSSangwon Jee packet[3]; 4986ccb1d8fSSangwon Jee pressure = packet[4]; 4996ccb1d8fSSangwon Jee size = packet[5]; 5006ccb1d8fSSangwon Jee if (ts->event_format == 0) { 5016ccb1d8fSSangwon Jee touch_major = packet[5]; 5026ccb1d8fSSangwon Jee touch_minor = packet[5]; 5036ccb1d8fSSangwon Jee } else { 5046ccb1d8fSSangwon Jee touch_major = packet[6]; 5056ccb1d8fSSangwon Jee touch_minor = packet[7]; 5066ccb1d8fSSangwon Jee } 5076ccb1d8fSSangwon Jee break; 5086ccb1d8fSSangwon Jee 5096ccb1d8fSSangwon Jee case 3: 5106ccb1d8fSSangwon Jee default: 5116ccb1d8fSSangwon Jee /* Touch + Force(Pressure) */ 5126ccb1d8fSSangwon Jee id = (packet[0] & 0x0F) - 1; 5136ccb1d8fSSangwon Jee hover = packet[1] & BIT(2); 5146ccb1d8fSSangwon Jee palm = packet[1] & BIT(1); 5156ccb1d8fSSangwon Jee state = packet[1] & BIT(0); 5166ccb1d8fSSangwon Jee x = ((packet[2] & 0x0F) << 8) | packet[3]; 5176ccb1d8fSSangwon Jee y = (((packet[2] >> 4) & 0x0F) << 8) | 5186ccb1d8fSSangwon Jee packet[4]; 5196ccb1d8fSSangwon Jee size = packet[6]; 5206ccb1d8fSSangwon Jee pressure_stage = (packet[7] & 0xF0) >> 4; 5216ccb1d8fSSangwon Jee pressure = ((packet[7] & 0x0F) << 8) | 5226ccb1d8fSSangwon Jee packet[8]; 5236ccb1d8fSSangwon Jee touch_major = packet[9]; 5246ccb1d8fSSangwon Jee touch_minor = packet[10]; 5256ccb1d8fSSangwon Jee break; 5266ccb1d8fSSangwon Jee } 5276ccb1d8fSSangwon Jee 5286ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 5296ccb1d8fSSangwon Jee "Screen - Slot: %d State: %d X: %04d Y: %04d Z: %d\n", 5306ccb1d8fSSangwon Jee id, state, x, y, pressure); 5316ccb1d8fSSangwon Jee 5326ccb1d8fSSangwon Jee if (unlikely(id < 0 || id >= MIP4_MAX_FINGERS)) { 5336ccb1d8fSSangwon Jee dev_err(&ts->client->dev, "Screen - invalid slot ID: %d\n", id); 5346ccb1d8fSSangwon Jee } else if (state) { 5356ccb1d8fSSangwon Jee /* Press or Move event */ 5366ccb1d8fSSangwon Jee input_mt_slot(ts->input, id); 5376ccb1d8fSSangwon Jee input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); 5386ccb1d8fSSangwon Jee input_report_abs(ts->input, ABS_MT_POSITION_X, x); 5396ccb1d8fSSangwon Jee input_report_abs(ts->input, ABS_MT_POSITION_Y, y); 5406ccb1d8fSSangwon Jee input_report_abs(ts->input, ABS_MT_PRESSURE, pressure); 5416ccb1d8fSSangwon Jee input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, touch_major); 5426ccb1d8fSSangwon Jee input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, touch_minor); 5436ccb1d8fSSangwon Jee } else { 5446ccb1d8fSSangwon Jee /* Release event */ 5456ccb1d8fSSangwon Jee input_mt_slot(ts->input, id); 5466ccb1d8fSSangwon Jee input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0); 5476ccb1d8fSSangwon Jee } 5486ccb1d8fSSangwon Jee 5496ccb1d8fSSangwon Jee input_mt_sync_frame(ts->input); 5506ccb1d8fSSangwon Jee } 5516ccb1d8fSSangwon Jee 5526ccb1d8fSSangwon Jee static int mip4_handle_packet(struct mip4_ts *ts, u8 *packet) 5536ccb1d8fSSangwon Jee { 5546ccb1d8fSSangwon Jee u8 type; 5556ccb1d8fSSangwon Jee 5566ccb1d8fSSangwon Jee switch (ts->event_format) { 5576ccb1d8fSSangwon Jee case 0: 5586ccb1d8fSSangwon Jee case 1: 5596ccb1d8fSSangwon Jee type = (packet[0] & 0x40) >> 6; 5606ccb1d8fSSangwon Jee break; 5616ccb1d8fSSangwon Jee 5626ccb1d8fSSangwon Jee case 3: 5636ccb1d8fSSangwon Jee type = (packet[0] & 0xF0) >> 4; 5646ccb1d8fSSangwon Jee break; 5656ccb1d8fSSangwon Jee 5666ccb1d8fSSangwon Jee default: 5676ccb1d8fSSangwon Jee /* Should not happen unless we have corrupted firmware */ 5686ccb1d8fSSangwon Jee return -EINVAL; 5696ccb1d8fSSangwon Jee } 5706ccb1d8fSSangwon Jee 5716ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "Type: %d\n", type); 5726ccb1d8fSSangwon Jee 5736ccb1d8fSSangwon Jee /* Report input event */ 5746ccb1d8fSSangwon Jee switch (type) { 5756ccb1d8fSSangwon Jee case MIP4_EVENT_INPUT_TYPE_KEY: 5766ccb1d8fSSangwon Jee mip4_report_keys(ts, packet); 5776ccb1d8fSSangwon Jee break; 5786ccb1d8fSSangwon Jee 5796ccb1d8fSSangwon Jee case MIP4_EVENT_INPUT_TYPE_SCREEN: 5806ccb1d8fSSangwon Jee mip4_report_touch(ts, packet); 5816ccb1d8fSSangwon Jee break; 5826ccb1d8fSSangwon Jee 5836ccb1d8fSSangwon Jee default: 5846ccb1d8fSSangwon Jee dev_err(&ts->client->dev, "Unknown event type: %d\n", type); 5856ccb1d8fSSangwon Jee break; 5866ccb1d8fSSangwon Jee } 5876ccb1d8fSSangwon Jee 5886ccb1d8fSSangwon Jee return 0; 5896ccb1d8fSSangwon Jee } 5906ccb1d8fSSangwon Jee 5916ccb1d8fSSangwon Jee static irqreturn_t mip4_interrupt(int irq, void *dev_id) 5926ccb1d8fSSangwon Jee { 5936ccb1d8fSSangwon Jee struct mip4_ts *ts = dev_id; 5946ccb1d8fSSangwon Jee struct i2c_client *client = ts->client; 5956ccb1d8fSSangwon Jee unsigned int i; 5966ccb1d8fSSangwon Jee int error; 5976ccb1d8fSSangwon Jee u8 cmd[2]; 5986ccb1d8fSSangwon Jee u8 size; 5996ccb1d8fSSangwon Jee bool alert; 6006ccb1d8fSSangwon Jee 6016ccb1d8fSSangwon Jee /* Read packet info */ 6026ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_EVENT; 6036ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_EVENT_PACKET_INFO; 6046ccb1d8fSSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, 1); 6056ccb1d8fSSangwon Jee if (error) { 6066ccb1d8fSSangwon Jee dev_err(&client->dev, 6076ccb1d8fSSangwon Jee "Failed to read packet info: %d\n", error); 6086ccb1d8fSSangwon Jee goto out; 6096ccb1d8fSSangwon Jee } 6106ccb1d8fSSangwon Jee 6116ccb1d8fSSangwon Jee size = ts->buf[0] & 0x7F; 6126ccb1d8fSSangwon Jee alert = ts->buf[0] & BIT(7); 6136ccb1d8fSSangwon Jee dev_dbg(&client->dev, "packet size: %d, alert: %d\n", size, alert); 6146ccb1d8fSSangwon Jee 6156ccb1d8fSSangwon Jee /* Check size */ 6166ccb1d8fSSangwon Jee if (!size) { 6176ccb1d8fSSangwon Jee dev_err(&client->dev, "Empty packet\n"); 6186ccb1d8fSSangwon Jee goto out; 6196ccb1d8fSSangwon Jee } 6206ccb1d8fSSangwon Jee 6216ccb1d8fSSangwon Jee /* Read packet data */ 6226ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_EVENT; 6236ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_EVENT_PACKET_DATA; 6246ccb1d8fSSangwon Jee error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, size); 6256ccb1d8fSSangwon Jee if (error) { 6266ccb1d8fSSangwon Jee dev_err(&client->dev, 6276ccb1d8fSSangwon Jee "Failed to read packet data: %d\n", error); 6286ccb1d8fSSangwon Jee goto out; 6296ccb1d8fSSangwon Jee } 6306ccb1d8fSSangwon Jee 6316ccb1d8fSSangwon Jee if (alert) { 6326ccb1d8fSSangwon Jee dev_dbg(&client->dev, "Alert: %d\n", ts->buf[0]); 6336ccb1d8fSSangwon Jee } else { 6346ccb1d8fSSangwon Jee for (i = 0; i < size; i += ts->event_size) { 6356ccb1d8fSSangwon Jee error = mip4_handle_packet(ts, &ts->buf[i]); 6366ccb1d8fSSangwon Jee if (error) 6376ccb1d8fSSangwon Jee break; 6386ccb1d8fSSangwon Jee } 6396ccb1d8fSSangwon Jee 6406ccb1d8fSSangwon Jee input_sync(ts->input); 6416ccb1d8fSSangwon Jee } 6426ccb1d8fSSangwon Jee 6436ccb1d8fSSangwon Jee out: 6446ccb1d8fSSangwon Jee return IRQ_HANDLED; 6456ccb1d8fSSangwon Jee } 6466ccb1d8fSSangwon Jee 6476ccb1d8fSSangwon Jee static int mip4_input_open(struct input_dev *dev) 6486ccb1d8fSSangwon Jee { 6496ccb1d8fSSangwon Jee struct mip4_ts *ts = input_get_drvdata(dev); 6506ccb1d8fSSangwon Jee 6516ccb1d8fSSangwon Jee return mip4_enable(ts); 6526ccb1d8fSSangwon Jee } 6536ccb1d8fSSangwon Jee 6546ccb1d8fSSangwon Jee static void mip4_input_close(struct input_dev *dev) 6556ccb1d8fSSangwon Jee { 6566ccb1d8fSSangwon Jee struct mip4_ts *ts = input_get_drvdata(dev); 6576ccb1d8fSSangwon Jee 6586ccb1d8fSSangwon Jee mip4_disable(ts); 6596ccb1d8fSSangwon Jee } 6606ccb1d8fSSangwon Jee 6616ccb1d8fSSangwon Jee /***************************************************************** 6626ccb1d8fSSangwon Jee * Firmware update 6636ccb1d8fSSangwon Jee *****************************************************************/ 6646ccb1d8fSSangwon Jee 6656ccb1d8fSSangwon Jee /* Firmware Info */ 6666ccb1d8fSSangwon Jee #define MIP4_BL_PAGE_SIZE 512 /* 512 */ 6676ccb1d8fSSangwon Jee #define MIP4_BL_PACKET_SIZE 512 /* 512, 256, 128, 64, ... */ 6686ccb1d8fSSangwon Jee 6696ccb1d8fSSangwon Jee /* 6706ccb1d8fSSangwon Jee * Firmware binary tail info 6716ccb1d8fSSangwon Jee */ 6726ccb1d8fSSangwon Jee 6736ccb1d8fSSangwon Jee struct mip4_bin_tail { 6746ccb1d8fSSangwon Jee u8 tail_mark[4]; 6756ccb1d8fSSangwon Jee u8 chip_name[4]; 6766ccb1d8fSSangwon Jee 6776ccb1d8fSSangwon Jee __le32 bin_start_addr; 6786ccb1d8fSSangwon Jee __le32 bin_length; 6796ccb1d8fSSangwon Jee 6806ccb1d8fSSangwon Jee __le16 ver_boot; 6816ccb1d8fSSangwon Jee __le16 ver_core; 6826ccb1d8fSSangwon Jee __le16 ver_app; 6836ccb1d8fSSangwon Jee __le16 ver_param; 6846ccb1d8fSSangwon Jee 6856ccb1d8fSSangwon Jee u8 boot_start; 6866ccb1d8fSSangwon Jee u8 boot_end; 6876ccb1d8fSSangwon Jee u8 core_start; 6886ccb1d8fSSangwon Jee u8 core_end; 6896ccb1d8fSSangwon Jee u8 app_start; 6906ccb1d8fSSangwon Jee u8 app_end; 6916ccb1d8fSSangwon Jee u8 param_start; 6926ccb1d8fSSangwon Jee u8 param_end; 6936ccb1d8fSSangwon Jee 6946ccb1d8fSSangwon Jee u8 checksum_type; 6956ccb1d8fSSangwon Jee u8 hw_category; 6966ccb1d8fSSangwon Jee 6976ccb1d8fSSangwon Jee __le16 param_id; 6986ccb1d8fSSangwon Jee __le32 param_length; 6996ccb1d8fSSangwon Jee __le32 build_date; 7006ccb1d8fSSangwon Jee __le32 build_time; 7016ccb1d8fSSangwon Jee 7026ccb1d8fSSangwon Jee __le32 reserved1; 7036ccb1d8fSSangwon Jee __le32 reserved2; 7046ccb1d8fSSangwon Jee __le16 reserved3; 7056ccb1d8fSSangwon Jee __le16 tail_size; 7066ccb1d8fSSangwon Jee __le32 crc; 7076ccb1d8fSSangwon Jee } __packed; 7086ccb1d8fSSangwon Jee 7096ccb1d8fSSangwon Jee #define MIP4_BIN_TAIL_MARK "MBT\001" 7106ccb1d8fSSangwon Jee #define MIP4_BIN_TAIL_SIZE (sizeof(struct mip4_bin_tail)) 7116ccb1d8fSSangwon Jee 7126ccb1d8fSSangwon Jee /* 7136ccb1d8fSSangwon Jee * Bootloader - Read status 7146ccb1d8fSSangwon Jee */ 7156ccb1d8fSSangwon Jee static int mip4_bl_read_status(struct mip4_ts *ts) 7166ccb1d8fSSangwon Jee { 7176ccb1d8fSSangwon Jee u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_STATUS }; 7186ccb1d8fSSangwon Jee u8 result; 7196ccb1d8fSSangwon Jee struct i2c_msg msg[] = { 7206ccb1d8fSSangwon Jee { 7216ccb1d8fSSangwon Jee .addr = ts->client->addr, 7226ccb1d8fSSangwon Jee .flags = 0, 7236ccb1d8fSSangwon Jee .buf = cmd, 7246ccb1d8fSSangwon Jee .len = sizeof(cmd), 7256ccb1d8fSSangwon Jee }, { 7266ccb1d8fSSangwon Jee .addr = ts->client->addr, 7276ccb1d8fSSangwon Jee .flags = I2C_M_RD, 7286ccb1d8fSSangwon Jee .buf = &result, 7296ccb1d8fSSangwon Jee .len = sizeof(result), 7306ccb1d8fSSangwon Jee }, 7316ccb1d8fSSangwon Jee }; 7326ccb1d8fSSangwon Jee int ret; 7336ccb1d8fSSangwon Jee int error; 7346ccb1d8fSSangwon Jee int retry = 1000; 7356ccb1d8fSSangwon Jee 7366ccb1d8fSSangwon Jee do { 7376ccb1d8fSSangwon Jee ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); 7386ccb1d8fSSangwon Jee if (ret != ARRAY_SIZE(msg)) { 7396ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 7406ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 7416ccb1d8fSSangwon Jee "Failed to read bootloader status: %d\n", 7426ccb1d8fSSangwon Jee error); 7436ccb1d8fSSangwon Jee return error; 7446ccb1d8fSSangwon Jee } 7456ccb1d8fSSangwon Jee 7466ccb1d8fSSangwon Jee switch (result) { 7476ccb1d8fSSangwon Jee case MIP4_BOOT_STATUS_DONE: 7486ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "%s - done\n", __func__); 7496ccb1d8fSSangwon Jee return 0; 7506ccb1d8fSSangwon Jee 7516ccb1d8fSSangwon Jee case MIP4_BOOT_STATUS_ERROR: 7526ccb1d8fSSangwon Jee dev_err(&ts->client->dev, "Bootloader failure\n"); 7536ccb1d8fSSangwon Jee return -EIO; 7546ccb1d8fSSangwon Jee 7556ccb1d8fSSangwon Jee case MIP4_BOOT_STATUS_BUSY: 7566ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "%s - Busy\n", __func__); 7576ccb1d8fSSangwon Jee error = -EBUSY; 7586ccb1d8fSSangwon Jee break; 7596ccb1d8fSSangwon Jee 7606ccb1d8fSSangwon Jee default: 7616ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 7626ccb1d8fSSangwon Jee "Unexpected bootloader status: %#02x\n", 7636ccb1d8fSSangwon Jee result); 7646ccb1d8fSSangwon Jee error = -EINVAL; 7656ccb1d8fSSangwon Jee break; 7666ccb1d8fSSangwon Jee } 7676ccb1d8fSSangwon Jee 7686ccb1d8fSSangwon Jee usleep_range(1000, 2000); 7696ccb1d8fSSangwon Jee } while (--retry); 7706ccb1d8fSSangwon Jee 7716ccb1d8fSSangwon Jee return error; 7726ccb1d8fSSangwon Jee } 7736ccb1d8fSSangwon Jee 7746ccb1d8fSSangwon Jee /* 7756ccb1d8fSSangwon Jee * Bootloader - Change mode 7766ccb1d8fSSangwon Jee */ 7776ccb1d8fSSangwon Jee static int mip4_bl_change_mode(struct mip4_ts *ts, u8 mode) 7786ccb1d8fSSangwon Jee { 7796ccb1d8fSSangwon Jee u8 mode_chg_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE, mode }; 7806ccb1d8fSSangwon Jee u8 mode_read_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE }; 7816ccb1d8fSSangwon Jee u8 result; 7826ccb1d8fSSangwon Jee struct i2c_msg msg[] = { 7836ccb1d8fSSangwon Jee { 7846ccb1d8fSSangwon Jee .addr = ts->client->addr, 7856ccb1d8fSSangwon Jee .flags = 0, 7866ccb1d8fSSangwon Jee .buf = mode_read_cmd, 7876ccb1d8fSSangwon Jee .len = sizeof(mode_read_cmd), 7886ccb1d8fSSangwon Jee }, { 7896ccb1d8fSSangwon Jee .addr = ts->client->addr, 7906ccb1d8fSSangwon Jee .flags = I2C_M_RD, 7916ccb1d8fSSangwon Jee .buf = &result, 7926ccb1d8fSSangwon Jee .len = sizeof(result), 7936ccb1d8fSSangwon Jee }, 7946ccb1d8fSSangwon Jee }; 7956ccb1d8fSSangwon Jee int retry = 10; 7966ccb1d8fSSangwon Jee int ret; 7976ccb1d8fSSangwon Jee int error; 7986ccb1d8fSSangwon Jee 7996ccb1d8fSSangwon Jee do { 8006ccb1d8fSSangwon Jee /* Send mode change command */ 8016ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, 8026ccb1d8fSSangwon Jee mode_chg_cmd, sizeof(mode_chg_cmd)); 8036ccb1d8fSSangwon Jee if (ret != sizeof(mode_chg_cmd)) { 8046ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 8056ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 8066ccb1d8fSSangwon Jee "Failed to send %d mode change: %d (%d)\n", 8076ccb1d8fSSangwon Jee mode, error, ret); 8086ccb1d8fSSangwon Jee return error; 8096ccb1d8fSSangwon Jee } 8106ccb1d8fSSangwon Jee 8116ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 8126ccb1d8fSSangwon Jee "Sent mode change request (mode: %d)\n", mode); 8136ccb1d8fSSangwon Jee 8146ccb1d8fSSangwon Jee /* Wait */ 8156ccb1d8fSSangwon Jee msleep(1000); 8166ccb1d8fSSangwon Jee 8176ccb1d8fSSangwon Jee /* Verify target mode */ 8186ccb1d8fSSangwon Jee ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); 8196ccb1d8fSSangwon Jee if (ret != ARRAY_SIZE(msg)) { 8206ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 8216ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 8226ccb1d8fSSangwon Jee "Failed to read device mode: %d\n", error); 8236ccb1d8fSSangwon Jee return error; 8246ccb1d8fSSangwon Jee } 8256ccb1d8fSSangwon Jee 8266ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 8276ccb1d8fSSangwon Jee "Current device mode: %d, want: %d\n", result, mode); 8286ccb1d8fSSangwon Jee 8296ccb1d8fSSangwon Jee if (result == mode) 8306ccb1d8fSSangwon Jee return 0; 8316ccb1d8fSSangwon Jee 8326ccb1d8fSSangwon Jee } while (--retry); 8336ccb1d8fSSangwon Jee 8346ccb1d8fSSangwon Jee return -EIO; 8356ccb1d8fSSangwon Jee } 8366ccb1d8fSSangwon Jee 8376ccb1d8fSSangwon Jee /* 8386ccb1d8fSSangwon Jee * Bootloader - Start bootloader mode 8396ccb1d8fSSangwon Jee */ 8406ccb1d8fSSangwon Jee static int mip4_bl_enter(struct mip4_ts *ts) 8416ccb1d8fSSangwon Jee { 8426ccb1d8fSSangwon Jee return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_BOOT); 8436ccb1d8fSSangwon Jee } 8446ccb1d8fSSangwon Jee 8456ccb1d8fSSangwon Jee /* 8466ccb1d8fSSangwon Jee * Bootloader - Exit bootloader mode 8476ccb1d8fSSangwon Jee */ 8486ccb1d8fSSangwon Jee static int mip4_bl_exit(struct mip4_ts *ts) 8496ccb1d8fSSangwon Jee { 8506ccb1d8fSSangwon Jee return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_APP); 8516ccb1d8fSSangwon Jee } 8526ccb1d8fSSangwon Jee 8536ccb1d8fSSangwon Jee static int mip4_bl_get_address(struct mip4_ts *ts, u16 *buf_addr) 8546ccb1d8fSSangwon Jee { 8556ccb1d8fSSangwon Jee u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_BUF_ADDR }; 8566ccb1d8fSSangwon Jee u8 result[sizeof(u16)]; 8576ccb1d8fSSangwon Jee struct i2c_msg msg[] = { 8586ccb1d8fSSangwon Jee { 8596ccb1d8fSSangwon Jee .addr = ts->client->addr, 8606ccb1d8fSSangwon Jee .flags = 0, 8616ccb1d8fSSangwon Jee .buf = cmd, 8626ccb1d8fSSangwon Jee .len = sizeof(cmd), 8636ccb1d8fSSangwon Jee }, { 8646ccb1d8fSSangwon Jee .addr = ts->client->addr, 8656ccb1d8fSSangwon Jee .flags = I2C_M_RD, 8666ccb1d8fSSangwon Jee .buf = result, 8676ccb1d8fSSangwon Jee .len = sizeof(result), 8686ccb1d8fSSangwon Jee }, 8696ccb1d8fSSangwon Jee }; 8706ccb1d8fSSangwon Jee int ret; 8716ccb1d8fSSangwon Jee int error; 8726ccb1d8fSSangwon Jee 8736ccb1d8fSSangwon Jee ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); 8746ccb1d8fSSangwon Jee if (ret != ARRAY_SIZE(msg)) { 8756ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 8766ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 8776ccb1d8fSSangwon Jee "Failed to retrieve bootloader buffer address: %d\n", 8786ccb1d8fSSangwon Jee error); 8796ccb1d8fSSangwon Jee return error; 8806ccb1d8fSSangwon Jee } 8816ccb1d8fSSangwon Jee 8826ccb1d8fSSangwon Jee *buf_addr = get_unaligned_le16(result); 8836ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 8846ccb1d8fSSangwon Jee "Bootloader buffer address %#04x\n", *buf_addr); 8856ccb1d8fSSangwon Jee 8866ccb1d8fSSangwon Jee return 0; 8876ccb1d8fSSangwon Jee } 8886ccb1d8fSSangwon Jee 8896ccb1d8fSSangwon Jee static int mip4_bl_program_page(struct mip4_ts *ts, int offset, 8906ccb1d8fSSangwon Jee const u8 *data, int length, u16 buf_addr) 8916ccb1d8fSSangwon Jee { 8926ccb1d8fSSangwon Jee u8 cmd[6]; 8936ccb1d8fSSangwon Jee u8 *data_buf; 8946ccb1d8fSSangwon Jee u16 buf_offset; 8956ccb1d8fSSangwon Jee int ret; 8966ccb1d8fSSangwon Jee int error; 8976ccb1d8fSSangwon Jee 8986ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "Writing page @%#06x (%d)\n", 8996ccb1d8fSSangwon Jee offset, length); 9006ccb1d8fSSangwon Jee 9016ccb1d8fSSangwon Jee if (length > MIP4_BL_PAGE_SIZE || length % MIP4_BL_PACKET_SIZE) { 9026ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 9036ccb1d8fSSangwon Jee "Invalid page length: %d\n", length); 9046ccb1d8fSSangwon Jee return -EINVAL; 9056ccb1d8fSSangwon Jee } 9066ccb1d8fSSangwon Jee 9076ccb1d8fSSangwon Jee data_buf = kmalloc(2 + MIP4_BL_PACKET_SIZE, GFP_KERNEL); 9086ccb1d8fSSangwon Jee if (!data_buf) 9096ccb1d8fSSangwon Jee return -ENOMEM; 9106ccb1d8fSSangwon Jee 9116ccb1d8fSSangwon Jee /* Addr */ 9126ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_BOOT; 9136ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_BOOT_TARGET_ADDR; 9146ccb1d8fSSangwon Jee put_unaligned_le32(offset, &cmd[2]); 9156ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, cmd, 6); 9166ccb1d8fSSangwon Jee if (ret != 6) { 9176ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 9186ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 9196ccb1d8fSSangwon Jee "Failed to send write page address: %d\n", error); 9206ccb1d8fSSangwon Jee goto out; 9216ccb1d8fSSangwon Jee } 9226ccb1d8fSSangwon Jee 9236ccb1d8fSSangwon Jee /* Size */ 9246ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_BOOT; 9256ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_BOOT_SIZE; 9266ccb1d8fSSangwon Jee put_unaligned_le32(length, &cmd[2]); 9276ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, cmd, 6); 9286ccb1d8fSSangwon Jee if (ret != 6) { 9296ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 9306ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 9316ccb1d8fSSangwon Jee "Failed to send write page size: %d\n", error); 9326ccb1d8fSSangwon Jee goto out; 9336ccb1d8fSSangwon Jee } 9346ccb1d8fSSangwon Jee 9356ccb1d8fSSangwon Jee /* Data */ 9366ccb1d8fSSangwon Jee for (buf_offset = 0; 9376ccb1d8fSSangwon Jee buf_offset < length; 9386ccb1d8fSSangwon Jee buf_offset += MIP4_BL_PACKET_SIZE) { 9396ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 9406ccb1d8fSSangwon Jee "writing chunk at %#04x (size %d)\n", 9416ccb1d8fSSangwon Jee buf_offset, MIP4_BL_PACKET_SIZE); 9426ccb1d8fSSangwon Jee put_unaligned_be16(buf_addr + buf_offset, data_buf); 9436ccb1d8fSSangwon Jee memcpy(&data_buf[2], &data[buf_offset], MIP4_BL_PACKET_SIZE); 9446ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, 9456ccb1d8fSSangwon Jee data_buf, 2 + MIP4_BL_PACKET_SIZE); 9466ccb1d8fSSangwon Jee if (ret != 2 + MIP4_BL_PACKET_SIZE) { 9476ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 9486ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 9496ccb1d8fSSangwon Jee "Failed to read chunk at %#04x (size %d): %d\n", 9506ccb1d8fSSangwon Jee buf_offset, MIP4_BL_PACKET_SIZE, error); 9516ccb1d8fSSangwon Jee goto out; 9526ccb1d8fSSangwon Jee } 9536ccb1d8fSSangwon Jee } 9546ccb1d8fSSangwon Jee 9556ccb1d8fSSangwon Jee /* Command */ 9566ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_BOOT; 9576ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_BOOT_CMD; 9586ccb1d8fSSangwon Jee cmd[2] = MIP4_BOOT_CMD_PROGRAM; 9596ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, cmd, 3); 9606ccb1d8fSSangwon Jee if (ret != 3) { 9616ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 9626ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 9636ccb1d8fSSangwon Jee "Failed to send 'write' command: %d\n", error); 9646ccb1d8fSSangwon Jee goto out; 9656ccb1d8fSSangwon Jee } 9666ccb1d8fSSangwon Jee 9676ccb1d8fSSangwon Jee /* Status */ 9686ccb1d8fSSangwon Jee error = mip4_bl_read_status(ts); 9696ccb1d8fSSangwon Jee 9706ccb1d8fSSangwon Jee out: 9716ccb1d8fSSangwon Jee kfree(data_buf); 9726ccb1d8fSSangwon Jee return error ? error : 0; 9736ccb1d8fSSangwon Jee } 9746ccb1d8fSSangwon Jee 9756ccb1d8fSSangwon Jee static int mip4_bl_verify_page(struct mip4_ts *ts, int offset, 9766ccb1d8fSSangwon Jee const u8 *data, int length, int buf_addr) 9776ccb1d8fSSangwon Jee { 9786ccb1d8fSSangwon Jee u8 cmd[8]; 9796ccb1d8fSSangwon Jee u8 *read_buf; 9806ccb1d8fSSangwon Jee int buf_offset; 9816ccb1d8fSSangwon Jee struct i2c_msg msg[] = { 9826ccb1d8fSSangwon Jee { 9836ccb1d8fSSangwon Jee .addr = ts->client->addr, 9846ccb1d8fSSangwon Jee .flags = 0, 9856ccb1d8fSSangwon Jee .buf = cmd, 9866ccb1d8fSSangwon Jee .len = 2, 9876ccb1d8fSSangwon Jee }, { 9886ccb1d8fSSangwon Jee .addr = ts->client->addr, 9896ccb1d8fSSangwon Jee .flags = I2C_M_RD, 9906ccb1d8fSSangwon Jee .len = MIP4_BL_PACKET_SIZE, 9916ccb1d8fSSangwon Jee }, 9926ccb1d8fSSangwon Jee }; 9936ccb1d8fSSangwon Jee int ret; 9946ccb1d8fSSangwon Jee int error; 9956ccb1d8fSSangwon Jee 9966ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "Validating page @%#06x (%d)\n", 9976ccb1d8fSSangwon Jee offset, length); 9986ccb1d8fSSangwon Jee 9996ccb1d8fSSangwon Jee /* Addr */ 10006ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_BOOT; 10016ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_BOOT_TARGET_ADDR; 10026ccb1d8fSSangwon Jee put_unaligned_le32(offset, &cmd[2]); 10036ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, cmd, 6); 10046ccb1d8fSSangwon Jee if (ret != 6) { 10056ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 10066ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 10076ccb1d8fSSangwon Jee "Failed to send read page address: %d\n", error); 10086ccb1d8fSSangwon Jee return error; 10096ccb1d8fSSangwon Jee } 10106ccb1d8fSSangwon Jee 10116ccb1d8fSSangwon Jee /* Size */ 10126ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_BOOT; 10136ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_BOOT_SIZE; 10146ccb1d8fSSangwon Jee put_unaligned_le32(length, &cmd[2]); 10156ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, cmd, 6); 10166ccb1d8fSSangwon Jee if (ret != 6) { 10176ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 10186ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 10196ccb1d8fSSangwon Jee "Failed to send read page size: %d\n", error); 10206ccb1d8fSSangwon Jee return error; 10216ccb1d8fSSangwon Jee } 10226ccb1d8fSSangwon Jee 10236ccb1d8fSSangwon Jee /* Command */ 10246ccb1d8fSSangwon Jee cmd[0] = MIP4_R0_BOOT; 10256ccb1d8fSSangwon Jee cmd[1] = MIP4_R1_BOOT_CMD; 10266ccb1d8fSSangwon Jee cmd[2] = MIP4_BOOT_CMD_READ; 10276ccb1d8fSSangwon Jee ret = i2c_master_send(ts->client, cmd, 3); 10286ccb1d8fSSangwon Jee if (ret != 3) { 10296ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 10306ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 10316ccb1d8fSSangwon Jee "Failed to send 'read' command: %d\n", error); 10326ccb1d8fSSangwon Jee return error; 10336ccb1d8fSSangwon Jee } 10346ccb1d8fSSangwon Jee 10356ccb1d8fSSangwon Jee /* Status */ 10366ccb1d8fSSangwon Jee error = mip4_bl_read_status(ts); 10376ccb1d8fSSangwon Jee if (error) 10386ccb1d8fSSangwon Jee return error; 10396ccb1d8fSSangwon Jee 10406ccb1d8fSSangwon Jee /* Read */ 10416ccb1d8fSSangwon Jee msg[1].buf = read_buf = kmalloc(MIP4_BL_PACKET_SIZE, GFP_KERNEL); 10426ccb1d8fSSangwon Jee if (!read_buf) 10436ccb1d8fSSangwon Jee return -ENOMEM; 10446ccb1d8fSSangwon Jee 10456ccb1d8fSSangwon Jee for (buf_offset = 0; 10466ccb1d8fSSangwon Jee buf_offset < length; 10476ccb1d8fSSangwon Jee buf_offset += MIP4_BL_PACKET_SIZE) { 10486ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 10496ccb1d8fSSangwon Jee "reading chunk at %#04x (size %d)\n", 10506ccb1d8fSSangwon Jee buf_offset, MIP4_BL_PACKET_SIZE); 10516ccb1d8fSSangwon Jee put_unaligned_be16(buf_addr + buf_offset, cmd); 10526ccb1d8fSSangwon Jee ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); 10536ccb1d8fSSangwon Jee if (ret != ARRAY_SIZE(msg)) { 10546ccb1d8fSSangwon Jee error = ret < 0 ? ret : -EIO; 10556ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 10566ccb1d8fSSangwon Jee "Failed to read chunk at %#04x (size %d): %d\n", 10576ccb1d8fSSangwon Jee buf_offset, MIP4_BL_PACKET_SIZE, error); 10586ccb1d8fSSangwon Jee break; 10596ccb1d8fSSangwon Jee } 10606ccb1d8fSSangwon Jee 10616ccb1d8fSSangwon Jee if (memcmp(&data[buf_offset], read_buf, MIP4_BL_PACKET_SIZE)) { 10626ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 10636ccb1d8fSSangwon Jee "Failed to validate chunk at %#04x (size %d)\n", 10646ccb1d8fSSangwon Jee buf_offset, MIP4_BL_PACKET_SIZE); 10656ccb1d8fSSangwon Jee #if MIP4_FW_UPDATE_DEBUG 10666ccb1d8fSSangwon Jee print_hex_dump(KERN_DEBUG, 10676ccb1d8fSSangwon Jee MIP4_DEVICE_NAME " F/W File: ", 10686ccb1d8fSSangwon Jee DUMP_PREFIX_OFFSET, 16, 1, 10696ccb1d8fSSangwon Jee data + offset, MIP4_BL_PACKET_SIZE, 10706ccb1d8fSSangwon Jee false); 10716ccb1d8fSSangwon Jee print_hex_dump(KERN_DEBUG, 10726ccb1d8fSSangwon Jee MIP4_DEVICE_NAME " F/W Chip: ", 10736ccb1d8fSSangwon Jee DUMP_PREFIX_OFFSET, 16, 1, 10746ccb1d8fSSangwon Jee read_buf, MIP4_BL_PAGE_SIZE, false); 10756ccb1d8fSSangwon Jee #endif 10766ccb1d8fSSangwon Jee error = -EINVAL; 10776ccb1d8fSSangwon Jee break; 10786ccb1d8fSSangwon Jee } 10796ccb1d8fSSangwon Jee } 10806ccb1d8fSSangwon Jee 10816ccb1d8fSSangwon Jee kfree(read_buf); 10826ccb1d8fSSangwon Jee return error ? error : 0; 10836ccb1d8fSSangwon Jee } 10846ccb1d8fSSangwon Jee 10856ccb1d8fSSangwon Jee /* 10866ccb1d8fSSangwon Jee * Flash chip firmware 10876ccb1d8fSSangwon Jee */ 10886ccb1d8fSSangwon Jee static int mip4_flash_fw(struct mip4_ts *ts, 10896ccb1d8fSSangwon Jee const u8 *fw_data, u32 fw_size, u32 fw_offset) 10906ccb1d8fSSangwon Jee { 10916ccb1d8fSSangwon Jee struct i2c_client *client = ts->client; 10926ccb1d8fSSangwon Jee int offset; 10936ccb1d8fSSangwon Jee u16 buf_addr; 10946ccb1d8fSSangwon Jee int error, error2; 10956ccb1d8fSSangwon Jee 10966ccb1d8fSSangwon Jee /* Enter bootloader mode */ 10976ccb1d8fSSangwon Jee dev_dbg(&client->dev, "Entering bootloader mode\n"); 10986ccb1d8fSSangwon Jee 10996ccb1d8fSSangwon Jee error = mip4_bl_enter(ts); 11006ccb1d8fSSangwon Jee if (error) { 11016ccb1d8fSSangwon Jee dev_err(&client->dev, 11026ccb1d8fSSangwon Jee "Failed to enter bootloader mode: %d\n", 11036ccb1d8fSSangwon Jee error); 11046ccb1d8fSSangwon Jee return error; 11056ccb1d8fSSangwon Jee } 11066ccb1d8fSSangwon Jee 11076ccb1d8fSSangwon Jee /* Read info */ 11086ccb1d8fSSangwon Jee error = mip4_bl_get_address(ts, &buf_addr); 11096ccb1d8fSSangwon Jee if (error) 11106ccb1d8fSSangwon Jee goto exit_bl; 11116ccb1d8fSSangwon Jee 11126ccb1d8fSSangwon Jee /* Program & Verify */ 11136ccb1d8fSSangwon Jee dev_dbg(&client->dev, 11146ccb1d8fSSangwon Jee "Program & Verify, page size: %d, packet size: %d\n", 11156ccb1d8fSSangwon Jee MIP4_BL_PAGE_SIZE, MIP4_BL_PACKET_SIZE); 11166ccb1d8fSSangwon Jee 11176ccb1d8fSSangwon Jee for (offset = fw_offset; 11186ccb1d8fSSangwon Jee offset < fw_offset + fw_size; 11196ccb1d8fSSangwon Jee offset += MIP4_BL_PAGE_SIZE) { 11206ccb1d8fSSangwon Jee /* Program */ 11216ccb1d8fSSangwon Jee error = mip4_bl_program_page(ts, offset, fw_data + offset, 11226ccb1d8fSSangwon Jee MIP4_BL_PAGE_SIZE, buf_addr); 11236ccb1d8fSSangwon Jee if (error) 11246ccb1d8fSSangwon Jee break; 11256ccb1d8fSSangwon Jee 11266ccb1d8fSSangwon Jee /* Verify */ 11276ccb1d8fSSangwon Jee error = mip4_bl_verify_page(ts, offset, fw_data + offset, 11286ccb1d8fSSangwon Jee MIP4_BL_PAGE_SIZE, buf_addr); 11296ccb1d8fSSangwon Jee if (error) 11306ccb1d8fSSangwon Jee break; 11316ccb1d8fSSangwon Jee } 11326ccb1d8fSSangwon Jee 11336ccb1d8fSSangwon Jee exit_bl: 11346ccb1d8fSSangwon Jee /* Exit bootloader mode */ 11356ccb1d8fSSangwon Jee dev_dbg(&client->dev, "Exiting bootloader mode\n"); 11366ccb1d8fSSangwon Jee 11376ccb1d8fSSangwon Jee error2 = mip4_bl_exit(ts); 11386ccb1d8fSSangwon Jee if (error2) { 11396ccb1d8fSSangwon Jee dev_err(&client->dev, 11406ccb1d8fSSangwon Jee "Failed to exit bootloader mode: %d\n", error2); 11416ccb1d8fSSangwon Jee if (!error) 11426ccb1d8fSSangwon Jee error = error2; 11436ccb1d8fSSangwon Jee } 11446ccb1d8fSSangwon Jee 11456ccb1d8fSSangwon Jee /* Reset chip */ 11466ccb1d8fSSangwon Jee mip4_power_off(ts); 11476ccb1d8fSSangwon Jee mip4_power_on(ts); 11486ccb1d8fSSangwon Jee 11496ccb1d8fSSangwon Jee mip4_query_device(ts); 11506ccb1d8fSSangwon Jee 11516ccb1d8fSSangwon Jee /* Refresh device parameters */ 11526ccb1d8fSSangwon Jee input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0); 11536ccb1d8fSSangwon Jee input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0); 11546ccb1d8fSSangwon Jee input_set_abs_params(ts->input, ABS_X, 0, ts->max_x, 0, 0); 11556ccb1d8fSSangwon Jee input_set_abs_params(ts->input, ABS_Y, 0, ts->max_y, 0, 0); 11567a3ed686SSangwon Jee input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x); 11577a3ed686SSangwon Jee input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y); 11587a3ed686SSangwon Jee input_abs_set_res(ts->input, ABS_X, ts->ppm_x); 11597a3ed686SSangwon Jee input_abs_set_res(ts->input, ABS_Y, ts->ppm_y); 11606ccb1d8fSSangwon Jee 11616ccb1d8fSSangwon Jee return error ? error : 0; 11626ccb1d8fSSangwon Jee } 11636ccb1d8fSSangwon Jee 11646ccb1d8fSSangwon Jee static int mip4_parse_firmware(struct mip4_ts *ts, const struct firmware *fw, 11656ccb1d8fSSangwon Jee u32 *fw_offset_start, u32 *fw_size, 11666ccb1d8fSSangwon Jee const struct mip4_bin_tail **pfw_info) 11676ccb1d8fSSangwon Jee { 11686ccb1d8fSSangwon Jee const struct mip4_bin_tail *fw_info; 11696ccb1d8fSSangwon Jee struct mip4_fw_version fw_version; 11706ccb1d8fSSangwon Jee u16 tail_size; 11716ccb1d8fSSangwon Jee 11726ccb1d8fSSangwon Jee if (fw->size < MIP4_BIN_TAIL_SIZE) { 11736ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 11746ccb1d8fSSangwon Jee "Invalid firmware, size mismatch (tail %zd vs %zd)\n", 11756ccb1d8fSSangwon Jee MIP4_BIN_TAIL_SIZE, fw->size); 11766ccb1d8fSSangwon Jee return -EINVAL; 11776ccb1d8fSSangwon Jee } 11786ccb1d8fSSangwon Jee 11796ccb1d8fSSangwon Jee fw_info = (const void *)&fw->data[fw->size - MIP4_BIN_TAIL_SIZE]; 11806ccb1d8fSSangwon Jee 11816ccb1d8fSSangwon Jee #if MIP4_FW_UPDATE_DEBUG 11826ccb1d8fSSangwon Jee print_hex_dump(KERN_ERR, MIP4_DEVICE_NAME " Bin Info: ", 11836ccb1d8fSSangwon Jee DUMP_PREFIX_OFFSET, 16, 1, *fw_info, tail_size, false); 11846ccb1d8fSSangwon Jee #endif 11856ccb1d8fSSangwon Jee 11866ccb1d8fSSangwon Jee tail_size = get_unaligned_le16(&fw_info->tail_size); 11876ccb1d8fSSangwon Jee if (tail_size != MIP4_BIN_TAIL_SIZE) { 11886ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 11896ccb1d8fSSangwon Jee "wrong tail size: %d (expected %zd)\n", 11906ccb1d8fSSangwon Jee tail_size, MIP4_BIN_TAIL_SIZE); 11916ccb1d8fSSangwon Jee return -EINVAL; 11926ccb1d8fSSangwon Jee } 11936ccb1d8fSSangwon Jee 11946ccb1d8fSSangwon Jee /* Check bin format */ 11956ccb1d8fSSangwon Jee if (memcmp(fw_info->tail_mark, MIP4_BIN_TAIL_MARK, 11966ccb1d8fSSangwon Jee sizeof(fw_info->tail_mark))) { 11976ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 11986ccb1d8fSSangwon Jee "unable to locate tail marker (%*ph vs %*ph)\n", 11996ccb1d8fSSangwon Jee (int)sizeof(fw_info->tail_mark), fw_info->tail_mark, 12006ccb1d8fSSangwon Jee (int)sizeof(fw_info->tail_mark), MIP4_BIN_TAIL_MARK); 12016ccb1d8fSSangwon Jee return -EINVAL; 12026ccb1d8fSSangwon Jee } 12036ccb1d8fSSangwon Jee 12046ccb1d8fSSangwon Jee *fw_offset_start = get_unaligned_le32(&fw_info->bin_start_addr); 12056ccb1d8fSSangwon Jee *fw_size = get_unaligned_le32(&fw_info->bin_length); 12066ccb1d8fSSangwon Jee 12076ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 12086ccb1d8fSSangwon Jee "F/W Data offset: %#08x, size: %d\n", 12096ccb1d8fSSangwon Jee *fw_offset_start, *fw_size); 12106ccb1d8fSSangwon Jee 12116ccb1d8fSSangwon Jee if (*fw_size % MIP4_BL_PAGE_SIZE) { 12126ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 12136ccb1d8fSSangwon Jee "encoded fw length %d is not multiple of pages (%d)\n", 12146ccb1d8fSSangwon Jee *fw_size, MIP4_BL_PAGE_SIZE); 12156ccb1d8fSSangwon Jee return -EINVAL; 12166ccb1d8fSSangwon Jee } 12176ccb1d8fSSangwon Jee 12186ccb1d8fSSangwon Jee if (fw->size != *fw_offset_start + *fw_size) { 12196ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 12206ccb1d8fSSangwon Jee "Wrong firmware size, expected %d bytes, got %zd\n", 12216ccb1d8fSSangwon Jee *fw_offset_start + *fw_size, fw->size); 12226ccb1d8fSSangwon Jee return -EINVAL; 12236ccb1d8fSSangwon Jee } 12246ccb1d8fSSangwon Jee 12256ccb1d8fSSangwon Jee mip4_parse_fw_version((const u8 *)&fw_info->ver_boot, &fw_version); 12266ccb1d8fSSangwon Jee 12276ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, 12286ccb1d8fSSangwon Jee "F/W file version %04X %04X %04X %04X\n", 12296ccb1d8fSSangwon Jee fw_version.boot, fw_version.core, 12306ccb1d8fSSangwon Jee fw_version.app, fw_version.param); 12316ccb1d8fSSangwon Jee 12326ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "F/W chip version: %04X %04X %04X %04X\n", 12336ccb1d8fSSangwon Jee ts->fw_version.boot, ts->fw_version.core, 12346ccb1d8fSSangwon Jee ts->fw_version.app, ts->fw_version.param); 12356ccb1d8fSSangwon Jee 12366ccb1d8fSSangwon Jee /* Check F/W type */ 12376ccb1d8fSSangwon Jee if (fw_version.boot != 0xEEEE && fw_version.boot != 0xFFFF && 12386ccb1d8fSSangwon Jee fw_version.core == 0xEEEE && 12396ccb1d8fSSangwon Jee fw_version.app == 0xEEEE && 12406ccb1d8fSSangwon Jee fw_version.param == 0xEEEE) { 12416ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "F/W type: Bootloader\n"); 12426ccb1d8fSSangwon Jee } else if (fw_version.boot == 0xEEEE && 12436ccb1d8fSSangwon Jee fw_version.core != 0xEEEE && fw_version.core != 0xFFFF && 12446ccb1d8fSSangwon Jee fw_version.app != 0xEEEE && fw_version.app != 0xFFFF && 12456ccb1d8fSSangwon Jee fw_version.param != 0xEEEE && fw_version.param != 0xFFFF) { 12466ccb1d8fSSangwon Jee dev_dbg(&ts->client->dev, "F/W type: Main\n"); 12476ccb1d8fSSangwon Jee } else { 12486ccb1d8fSSangwon Jee dev_err(&ts->client->dev, "Wrong firmware type\n"); 12496ccb1d8fSSangwon Jee return -EINVAL; 12506ccb1d8fSSangwon Jee } 12516ccb1d8fSSangwon Jee 12526ccb1d8fSSangwon Jee return 0; 12536ccb1d8fSSangwon Jee } 12546ccb1d8fSSangwon Jee 12556ccb1d8fSSangwon Jee static int mip4_execute_fw_update(struct mip4_ts *ts, const struct firmware *fw) 12566ccb1d8fSSangwon Jee { 12576ccb1d8fSSangwon Jee const struct mip4_bin_tail *fw_info; 12586ccb1d8fSSangwon Jee u32 fw_start_offset; 12596ccb1d8fSSangwon Jee u32 fw_size; 12606ccb1d8fSSangwon Jee int retires = 3; 12616ccb1d8fSSangwon Jee int error; 12626ccb1d8fSSangwon Jee 12636ccb1d8fSSangwon Jee error = mip4_parse_firmware(ts, fw, 12646ccb1d8fSSangwon Jee &fw_start_offset, &fw_size, &fw_info); 12656ccb1d8fSSangwon Jee if (error) 12666ccb1d8fSSangwon Jee return error; 12676ccb1d8fSSangwon Jee 12686ccb1d8fSSangwon Jee if (ts->input->users) { 12696ccb1d8fSSangwon Jee disable_irq(ts->client->irq); 12706ccb1d8fSSangwon Jee } else { 12716ccb1d8fSSangwon Jee error = mip4_power_on(ts); 12726ccb1d8fSSangwon Jee if (error) 12736ccb1d8fSSangwon Jee return error; 12746ccb1d8fSSangwon Jee } 12756ccb1d8fSSangwon Jee 12766ccb1d8fSSangwon Jee /* Update firmware */ 12776ccb1d8fSSangwon Jee do { 12786ccb1d8fSSangwon Jee error = mip4_flash_fw(ts, fw->data, fw_size, fw_start_offset); 12796ccb1d8fSSangwon Jee if (!error) 12806ccb1d8fSSangwon Jee break; 12816ccb1d8fSSangwon Jee } while (--retires); 12826ccb1d8fSSangwon Jee 12836ccb1d8fSSangwon Jee if (error) 12846ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 12856ccb1d8fSSangwon Jee "Failed to flash firmware: %d\n", error); 12866ccb1d8fSSangwon Jee 12876ccb1d8fSSangwon Jee /* Enable IRQ */ 12886ccb1d8fSSangwon Jee if (ts->input->users) 12896ccb1d8fSSangwon Jee enable_irq(ts->client->irq); 12906ccb1d8fSSangwon Jee else 12916ccb1d8fSSangwon Jee mip4_power_off(ts); 12926ccb1d8fSSangwon Jee 12936ccb1d8fSSangwon Jee return error ? error : 0; 12946ccb1d8fSSangwon Jee } 12956ccb1d8fSSangwon Jee 12966ccb1d8fSSangwon Jee static ssize_t mip4_sysfs_fw_update(struct device *dev, 12976ccb1d8fSSangwon Jee struct device_attribute *attr, 12986ccb1d8fSSangwon Jee const char *buf, size_t count) 12996ccb1d8fSSangwon Jee { 13006ccb1d8fSSangwon Jee struct i2c_client *client = to_i2c_client(dev); 13016ccb1d8fSSangwon Jee struct mip4_ts *ts = i2c_get_clientdata(client); 13026ccb1d8fSSangwon Jee const struct firmware *fw; 13036ccb1d8fSSangwon Jee int error; 13046ccb1d8fSSangwon Jee 1305c2c4ba82SSangwon Jee error = request_firmware(&fw, ts->fw_name, dev); 13066ccb1d8fSSangwon Jee if (error) { 13076ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 13086ccb1d8fSSangwon Jee "Failed to retrieve firmware %s: %d\n", 1309c2c4ba82SSangwon Jee ts->fw_name, error); 13106ccb1d8fSSangwon Jee return error; 13116ccb1d8fSSangwon Jee } 13126ccb1d8fSSangwon Jee 13136ccb1d8fSSangwon Jee /* 13146ccb1d8fSSangwon Jee * Take input mutex to prevent racing with itself and also with 13156ccb1d8fSSangwon Jee * userspace opening and closing the device and also suspend/resume 13166ccb1d8fSSangwon Jee * transitions. 13176ccb1d8fSSangwon Jee */ 13186ccb1d8fSSangwon Jee mutex_lock(&ts->input->mutex); 13196ccb1d8fSSangwon Jee 13206ccb1d8fSSangwon Jee error = mip4_execute_fw_update(ts, fw); 13216ccb1d8fSSangwon Jee 13226ccb1d8fSSangwon Jee mutex_unlock(&ts->input->mutex); 13236ccb1d8fSSangwon Jee 13246ccb1d8fSSangwon Jee release_firmware(fw); 13256ccb1d8fSSangwon Jee 13266ccb1d8fSSangwon Jee if (error) { 13276ccb1d8fSSangwon Jee dev_err(&ts->client->dev, 13286ccb1d8fSSangwon Jee "Firmware update failed: %d\n", error); 13296ccb1d8fSSangwon Jee return error; 13306ccb1d8fSSangwon Jee } 13316ccb1d8fSSangwon Jee 13326ccb1d8fSSangwon Jee return count; 13336ccb1d8fSSangwon Jee } 13346ccb1d8fSSangwon Jee 13356ccb1d8fSSangwon Jee static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mip4_sysfs_fw_update); 13366ccb1d8fSSangwon Jee 13376ccb1d8fSSangwon Jee static ssize_t mip4_sysfs_read_fw_version(struct device *dev, 13386ccb1d8fSSangwon Jee struct device_attribute *attr, 13396ccb1d8fSSangwon Jee char *buf) 13406ccb1d8fSSangwon Jee { 13416ccb1d8fSSangwon Jee struct i2c_client *client = to_i2c_client(dev); 13426ccb1d8fSSangwon Jee struct mip4_ts *ts = i2c_get_clientdata(client); 13436ccb1d8fSSangwon Jee size_t count; 13446ccb1d8fSSangwon Jee 13456ccb1d8fSSangwon Jee /* Take lock to prevent racing with firmware update */ 13466ccb1d8fSSangwon Jee mutex_lock(&ts->input->mutex); 13476ccb1d8fSSangwon Jee 13486ccb1d8fSSangwon Jee count = snprintf(buf, PAGE_SIZE, "%04X %04X %04X %04X\n", 13496ccb1d8fSSangwon Jee ts->fw_version.boot, ts->fw_version.core, 13506ccb1d8fSSangwon Jee ts->fw_version.app, ts->fw_version.param); 13516ccb1d8fSSangwon Jee 13526ccb1d8fSSangwon Jee mutex_unlock(&ts->input->mutex); 13536ccb1d8fSSangwon Jee 13546ccb1d8fSSangwon Jee return count; 13556ccb1d8fSSangwon Jee } 13566ccb1d8fSSangwon Jee 13576ccb1d8fSSangwon Jee static DEVICE_ATTR(fw_version, S_IRUGO, mip4_sysfs_read_fw_version, NULL); 13586ccb1d8fSSangwon Jee 13599aa40426SSangwon Jee static ssize_t mip4_sysfs_read_hw_version(struct device *dev, 13609aa40426SSangwon Jee struct device_attribute *attr, 13619aa40426SSangwon Jee char *buf) 13629aa40426SSangwon Jee { 13639aa40426SSangwon Jee struct i2c_client *client = to_i2c_client(dev); 13649aa40426SSangwon Jee struct mip4_ts *ts = i2c_get_clientdata(client); 13659aa40426SSangwon Jee size_t count; 13669aa40426SSangwon Jee 13679aa40426SSangwon Jee /* Take lock to prevent racing with firmware update */ 13689aa40426SSangwon Jee mutex_lock(&ts->input->mutex); 13699aa40426SSangwon Jee 13709aa40426SSangwon Jee /* 13719aa40426SSangwon Jee * product_name shows the name or version of the hardware 13729aa40426SSangwon Jee * paired with current firmware in the chip. 13739aa40426SSangwon Jee */ 13749aa40426SSangwon Jee count = snprintf(buf, PAGE_SIZE, "%.*s\n", 13759aa40426SSangwon Jee (int)sizeof(ts->product_name), ts->product_name); 13769aa40426SSangwon Jee 13779aa40426SSangwon Jee mutex_unlock(&ts->input->mutex); 13789aa40426SSangwon Jee 13799aa40426SSangwon Jee return count; 13809aa40426SSangwon Jee } 13819aa40426SSangwon Jee 13829aa40426SSangwon Jee static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL); 13839aa40426SSangwon Jee 1384e2aad666SSangwon Jee static ssize_t mip4_sysfs_read_product_id(struct device *dev, 1385e2aad666SSangwon Jee struct device_attribute *attr, 1386e2aad666SSangwon Jee char *buf) 1387e2aad666SSangwon Jee { 1388e2aad666SSangwon Jee struct i2c_client *client = to_i2c_client(dev); 1389e2aad666SSangwon Jee struct mip4_ts *ts = i2c_get_clientdata(client); 1390e2aad666SSangwon Jee size_t count; 1391e2aad666SSangwon Jee 1392e2aad666SSangwon Jee mutex_lock(&ts->input->mutex); 1393e2aad666SSangwon Jee 1394e2aad666SSangwon Jee count = snprintf(buf, PAGE_SIZE, "%04X\n", ts->product_id); 1395e2aad666SSangwon Jee 1396e2aad666SSangwon Jee mutex_unlock(&ts->input->mutex); 1397e2aad666SSangwon Jee 1398e2aad666SSangwon Jee return count; 1399e2aad666SSangwon Jee } 1400e2aad666SSangwon Jee 1401e2aad666SSangwon Jee static DEVICE_ATTR(product_id, S_IRUGO, mip4_sysfs_read_product_id, NULL); 1402e2aad666SSangwon Jee 14034e1bff07SSangwon Jee static ssize_t mip4_sysfs_read_ic_name(struct device *dev, 14044e1bff07SSangwon Jee struct device_attribute *attr, 14054e1bff07SSangwon Jee char *buf) 14064e1bff07SSangwon Jee { 14074e1bff07SSangwon Jee struct i2c_client *client = to_i2c_client(dev); 14084e1bff07SSangwon Jee struct mip4_ts *ts = i2c_get_clientdata(client); 14094e1bff07SSangwon Jee size_t count; 14104e1bff07SSangwon Jee 14114e1bff07SSangwon Jee mutex_lock(&ts->input->mutex); 14124e1bff07SSangwon Jee 14134e1bff07SSangwon Jee count = snprintf(buf, PAGE_SIZE, "%.*s\n", 14144e1bff07SSangwon Jee (int)sizeof(ts->ic_name), ts->ic_name); 14154e1bff07SSangwon Jee 14164e1bff07SSangwon Jee mutex_unlock(&ts->input->mutex); 14174e1bff07SSangwon Jee 14184e1bff07SSangwon Jee return count; 14194e1bff07SSangwon Jee } 14204e1bff07SSangwon Jee 14214e1bff07SSangwon Jee static DEVICE_ATTR(ic_name, S_IRUGO, mip4_sysfs_read_ic_name, NULL); 14224e1bff07SSangwon Jee 14236ccb1d8fSSangwon Jee static struct attribute *mip4_attrs[] = { 14246ccb1d8fSSangwon Jee &dev_attr_fw_version.attr, 14259aa40426SSangwon Jee &dev_attr_hw_version.attr, 1426e2aad666SSangwon Jee &dev_attr_product_id.attr, 14274e1bff07SSangwon Jee &dev_attr_ic_name.attr, 14286ccb1d8fSSangwon Jee &dev_attr_update_fw.attr, 14296ccb1d8fSSangwon Jee NULL, 14306ccb1d8fSSangwon Jee }; 14316ccb1d8fSSangwon Jee 14326ccb1d8fSSangwon Jee static const struct attribute_group mip4_attr_group = { 14336ccb1d8fSSangwon Jee .attrs = mip4_attrs, 14346ccb1d8fSSangwon Jee }; 14356ccb1d8fSSangwon Jee 14366ccb1d8fSSangwon Jee static int mip4_probe(struct i2c_client *client, const struct i2c_device_id *id) 14376ccb1d8fSSangwon Jee { 14386ccb1d8fSSangwon Jee struct mip4_ts *ts; 14396ccb1d8fSSangwon Jee struct input_dev *input; 14406ccb1d8fSSangwon Jee int error; 14416ccb1d8fSSangwon Jee 14426ccb1d8fSSangwon Jee if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 14436ccb1d8fSSangwon Jee dev_err(&client->dev, "Not supported I2C adapter\n"); 14446ccb1d8fSSangwon Jee return -ENXIO; 14456ccb1d8fSSangwon Jee } 14466ccb1d8fSSangwon Jee 14476ccb1d8fSSangwon Jee ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 14486ccb1d8fSSangwon Jee if (!ts) 14496ccb1d8fSSangwon Jee return -ENOMEM; 14506ccb1d8fSSangwon Jee 14516ccb1d8fSSangwon Jee input = devm_input_allocate_device(&client->dev); 14526ccb1d8fSSangwon Jee if (!input) 14536ccb1d8fSSangwon Jee return -ENOMEM; 14546ccb1d8fSSangwon Jee 14556ccb1d8fSSangwon Jee ts->client = client; 14566ccb1d8fSSangwon Jee ts->input = input; 14576ccb1d8fSSangwon Jee 14586ccb1d8fSSangwon Jee snprintf(ts->phys, sizeof(ts->phys), 14596ccb1d8fSSangwon Jee "%s/input0", dev_name(&client->dev)); 14606ccb1d8fSSangwon Jee 14616ccb1d8fSSangwon Jee ts->gpio_ce = devm_gpiod_get_optional(&client->dev, 14626ccb1d8fSSangwon Jee "ce", GPIOD_OUT_LOW); 14636ccb1d8fSSangwon Jee if (IS_ERR(ts->gpio_ce)) { 14646ccb1d8fSSangwon Jee error = PTR_ERR(ts->gpio_ce); 14656ccb1d8fSSangwon Jee if (error != EPROBE_DEFER) 14666ccb1d8fSSangwon Jee dev_err(&client->dev, 14676ccb1d8fSSangwon Jee "Failed to get gpio: %d\n", error); 14686ccb1d8fSSangwon Jee return error; 14696ccb1d8fSSangwon Jee } 14706ccb1d8fSSangwon Jee 14716ccb1d8fSSangwon Jee error = mip4_power_on(ts); 14726ccb1d8fSSangwon Jee if (error) 14736ccb1d8fSSangwon Jee return error; 14746ccb1d8fSSangwon Jee error = mip4_query_device(ts); 14756ccb1d8fSSangwon Jee mip4_power_off(ts); 14766ccb1d8fSSangwon Jee if (error) 14776ccb1d8fSSangwon Jee return error; 14786ccb1d8fSSangwon Jee 14796ccb1d8fSSangwon Jee input->name = "MELFAS MIP4 Touchscreen"; 14806ccb1d8fSSangwon Jee input->phys = ts->phys; 14816ccb1d8fSSangwon Jee 14826ccb1d8fSSangwon Jee input->id.bustype = BUS_I2C; 14836ccb1d8fSSangwon Jee input->id.vendor = 0x13c5; 1484c3fc6089SSangwon Jee input->id.product = ts->product_id; 14856ccb1d8fSSangwon Jee 14866ccb1d8fSSangwon Jee input->open = mip4_input_open; 14876ccb1d8fSSangwon Jee input->close = mip4_input_close; 14886ccb1d8fSSangwon Jee 14896ccb1d8fSSangwon Jee input_set_drvdata(input, ts); 14906ccb1d8fSSangwon Jee 14916ccb1d8fSSangwon Jee input->keycode = ts->key_code; 14926ccb1d8fSSangwon Jee input->keycodesize = sizeof(*ts->key_code); 14936ccb1d8fSSangwon Jee input->keycodemax = ts->key_num; 14946ccb1d8fSSangwon Jee 14956ccb1d8fSSangwon Jee input_set_abs_params(input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0); 14966ccb1d8fSSangwon Jee input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0); 14976ccb1d8fSSangwon Jee input_set_abs_params(input, ABS_MT_PRESSURE, 14986ccb1d8fSSangwon Jee MIP4_PRESSURE_MIN, MIP4_PRESSURE_MAX, 0, 0); 14996ccb1d8fSSangwon Jee input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 15006ccb1d8fSSangwon Jee MIP4_TOUCH_MAJOR_MIN, MIP4_TOUCH_MAJOR_MAX, 0, 0); 15016ccb1d8fSSangwon Jee input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 15026ccb1d8fSSangwon Jee MIP4_TOUCH_MINOR_MIN, MIP4_TOUCH_MINOR_MAX, 0, 0); 15037a3ed686SSangwon Jee input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x); 15047a3ed686SSangwon Jee input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y); 15056ccb1d8fSSangwon Jee 15066ccb1d8fSSangwon Jee error = input_mt_init_slots(input, MIP4_MAX_FINGERS, INPUT_MT_DIRECT); 15076ccb1d8fSSangwon Jee if (error) 15086ccb1d8fSSangwon Jee return error; 15096ccb1d8fSSangwon Jee 15106ccb1d8fSSangwon Jee i2c_set_clientdata(client, ts); 15116ccb1d8fSSangwon Jee 15126ccb1d8fSSangwon Jee error = devm_request_threaded_irq(&client->dev, client->irq, 15136ccb1d8fSSangwon Jee NULL, mip4_interrupt, 15146ccb1d8fSSangwon Jee IRQF_ONESHOT, MIP4_DEVICE_NAME, ts); 15156ccb1d8fSSangwon Jee if (error) { 15166ccb1d8fSSangwon Jee dev_err(&client->dev, 15176ccb1d8fSSangwon Jee "Failed to request interrupt %d: %d\n", 15186ccb1d8fSSangwon Jee client->irq, error); 15196ccb1d8fSSangwon Jee return error; 15206ccb1d8fSSangwon Jee } 15216ccb1d8fSSangwon Jee 15226ccb1d8fSSangwon Jee disable_irq(client->irq); 15236ccb1d8fSSangwon Jee 15246ccb1d8fSSangwon Jee error = input_register_device(input); 15256ccb1d8fSSangwon Jee if (error) { 15266ccb1d8fSSangwon Jee dev_err(&client->dev, 15276ccb1d8fSSangwon Jee "Failed to register input device: %d\n", error); 15286ccb1d8fSSangwon Jee return error; 15296ccb1d8fSSangwon Jee } 15306ccb1d8fSSangwon Jee 15314c16f82eSAndi Shyti error = devm_device_add_group(&client->dev, &mip4_attr_group); 15326ccb1d8fSSangwon Jee if (error) { 15336ccb1d8fSSangwon Jee dev_err(&client->dev, 15346ccb1d8fSSangwon Jee "Failed to create sysfs attribute group: %d\n", error); 15356ccb1d8fSSangwon Jee return error; 15366ccb1d8fSSangwon Jee } 15376ccb1d8fSSangwon Jee 15386ccb1d8fSSangwon Jee return 0; 15396ccb1d8fSSangwon Jee } 15406ccb1d8fSSangwon Jee 15416ccb1d8fSSangwon Jee static int __maybe_unused mip4_suspend(struct device *dev) 15426ccb1d8fSSangwon Jee { 15436ccb1d8fSSangwon Jee struct i2c_client *client = to_i2c_client(dev); 15446ccb1d8fSSangwon Jee struct mip4_ts *ts = i2c_get_clientdata(client); 15456ccb1d8fSSangwon Jee struct input_dev *input = ts->input; 15466ccb1d8fSSangwon Jee 15476ccb1d8fSSangwon Jee mutex_lock(&input->mutex); 15486ccb1d8fSSangwon Jee 15496ccb1d8fSSangwon Jee if (device_may_wakeup(dev)) 15506ccb1d8fSSangwon Jee ts->wake_irq_enabled = enable_irq_wake(client->irq) == 0; 15516ccb1d8fSSangwon Jee else if (input->users) 15526ccb1d8fSSangwon Jee mip4_disable(ts); 15536ccb1d8fSSangwon Jee 15546ccb1d8fSSangwon Jee mutex_unlock(&input->mutex); 15556ccb1d8fSSangwon Jee 15566ccb1d8fSSangwon Jee return 0; 15576ccb1d8fSSangwon Jee } 15586ccb1d8fSSangwon Jee 15596ccb1d8fSSangwon Jee static int __maybe_unused mip4_resume(struct device *dev) 15606ccb1d8fSSangwon Jee { 15616ccb1d8fSSangwon Jee struct i2c_client *client = to_i2c_client(dev); 15626ccb1d8fSSangwon Jee struct mip4_ts *ts = i2c_get_clientdata(client); 15636ccb1d8fSSangwon Jee struct input_dev *input = ts->input; 15646ccb1d8fSSangwon Jee 15656ccb1d8fSSangwon Jee mutex_lock(&input->mutex); 15666ccb1d8fSSangwon Jee 15676ccb1d8fSSangwon Jee if (ts->wake_irq_enabled) 15686ccb1d8fSSangwon Jee disable_irq_wake(client->irq); 15696ccb1d8fSSangwon Jee else if (input->users) 15706ccb1d8fSSangwon Jee mip4_enable(ts); 15716ccb1d8fSSangwon Jee 15726ccb1d8fSSangwon Jee mutex_unlock(&input->mutex); 15736ccb1d8fSSangwon Jee 15746ccb1d8fSSangwon Jee return 0; 15756ccb1d8fSSangwon Jee } 15766ccb1d8fSSangwon Jee 15776ccb1d8fSSangwon Jee static SIMPLE_DEV_PM_OPS(mip4_pm_ops, mip4_suspend, mip4_resume); 15786ccb1d8fSSangwon Jee 15796ccb1d8fSSangwon Jee #ifdef CONFIG_OF 15806ccb1d8fSSangwon Jee static const struct of_device_id mip4_of_match[] = { 15816ccb1d8fSSangwon Jee { .compatible = "melfas,"MIP4_DEVICE_NAME, }, 15826ccb1d8fSSangwon Jee { }, 15836ccb1d8fSSangwon Jee }; 15846ccb1d8fSSangwon Jee MODULE_DEVICE_TABLE(of, mip4_of_match); 15856ccb1d8fSSangwon Jee #endif 15866ccb1d8fSSangwon Jee 15876ccb1d8fSSangwon Jee #ifdef CONFIG_ACPI 15886ccb1d8fSSangwon Jee static const struct acpi_device_id mip4_acpi_match[] = { 15896ccb1d8fSSangwon Jee { "MLFS0000", 0}, 15906ccb1d8fSSangwon Jee { }, 15916ccb1d8fSSangwon Jee }; 15926ccb1d8fSSangwon Jee MODULE_DEVICE_TABLE(acpi, mip4_acpi_match); 15936ccb1d8fSSangwon Jee #endif 15946ccb1d8fSSangwon Jee 15956ccb1d8fSSangwon Jee static const struct i2c_device_id mip4_i2c_ids[] = { 15966ccb1d8fSSangwon Jee { MIP4_DEVICE_NAME, 0 }, 15976ccb1d8fSSangwon Jee { }, 15986ccb1d8fSSangwon Jee }; 15996ccb1d8fSSangwon Jee MODULE_DEVICE_TABLE(i2c, mip4_i2c_ids); 16006ccb1d8fSSangwon Jee 16016ccb1d8fSSangwon Jee static struct i2c_driver mip4_driver = { 16026ccb1d8fSSangwon Jee .id_table = mip4_i2c_ids, 16036ccb1d8fSSangwon Jee .probe = mip4_probe, 16046ccb1d8fSSangwon Jee .driver = { 16056ccb1d8fSSangwon Jee .name = MIP4_DEVICE_NAME, 16066ccb1d8fSSangwon Jee .of_match_table = of_match_ptr(mip4_of_match), 16076ccb1d8fSSangwon Jee .acpi_match_table = ACPI_PTR(mip4_acpi_match), 16086ccb1d8fSSangwon Jee .pm = &mip4_pm_ops, 16096ccb1d8fSSangwon Jee }, 16106ccb1d8fSSangwon Jee }; 16116ccb1d8fSSangwon Jee module_i2c_driver(mip4_driver); 16126ccb1d8fSSangwon Jee 16136ccb1d8fSSangwon Jee MODULE_DESCRIPTION("MELFAS MIP4 Touchscreen"); 1614c3fc6089SSangwon Jee MODULE_VERSION("2016.10.31"); 16156ccb1d8fSSangwon Jee MODULE_AUTHOR("Sangwon Jee <jeesw@melfas.com>"); 16166ccb1d8fSSangwon Jee MODULE_LICENSE("GPL"); 1617