--- /dev/null
+/*
+ * Atmel maXTouch Touchscreen driver
+ *
+ * Copyright (C) 2010 Samsung Electronics Co.Ltd
+ * Copyright (C) 2011-2014 Atmel Corporation
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * Author: Joonyoung Shim <jy0922.shim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/i2c/atmel_mxt_ts.h>
+#include <linux/input/mt.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+/* Version */
+#define MXT_VER_20 20
+#define MXT_VER_21 21
+#define MXT_VER_22 22
+
+/* Firmware files */
+#define MXT_FW_NAME "maxtouch.fw"
+#define MXT_CFG_NAME "maxtouch.cfg"
+#define MXT_CFG_MAGIC "OBP_RAW V1"
+
+/* Registers */
+#define MXT_INFO 0x00
+#define MXT_FAMILY_ID 0x00
+#define MXT_VARIANT_ID 0x01
+#define MXT_VERSION 0x02
+#define MXT_BUILD 0x03
+#define MXT_MATRIX_X_SIZE 0x04
+#define MXT_MATRIX_Y_SIZE 0x05
+#define MXT_OBJECT_NUM 0x06
+#define MXT_OBJECT_START 0x07
+
+#define MXT_OBJECT_SIZE 6
+#define MXT_INFO_CHECKSUM_SIZE 3
+#define MXT_MAX_BLOCK_WRITE 256
+
+/* Object types */
+#define MXT_DEBUG_DIAGNOSTIC_T37 37
+#define MXT_GEN_MESSAGE_T5 5
+#define MXT_GEN_COMMAND_T6 6
+#define MXT_GEN_POWER_T7 7
+#define MXT_GEN_ACQUIRE_T8 8
+#define MXT_GEN_DATASOURCE_T53 53
+#define MXT_TOUCH_MULTI_T9 9
+#define MXT_TOUCH_KEYARRAY_T15 15
+#define MXT_TOUCH_PROXIMITY_T23 23
+#define MXT_TOUCH_PROXKEY_T52 52
+#define MXT_PROCI_GRIPFACE_T20 20
+#define MXT_PROCG_NOISE_T22 22
+#define MXT_PROCI_ONETOUCH_T24 24
+#define MXT_PROCI_TWOTOUCH_T27 27
+#define MXT_PROCI_GRIP_T40 40
+#define MXT_PROCI_PALM_T41 41
+#define MXT_PROCI_TOUCHSUPPRESSION_T42 42
+#define MXT_PROCI_STYLUS_T47 47
+#define MXT_PROCG_NOISESUPPRESSION_T48 48
+#define MXT_SPT_COMMSCONFIG_T18 18
+#define MXT_SPT_GPIOPWM_T19 19
+#define MXT_SPT_SELFTEST_T25 25
+#define MXT_SPT_CTECONFIG_T28 28
+#define MXT_SPT_USERDATA_T38 38
+#define MXT_SPT_DIGITIZER_T43 43
+#define MXT_SPT_MESSAGECOUNT_T44 44
+#define MXT_SPT_CTECONFIG_T46 46
+#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
+
+/* MXT_GEN_MESSAGE_T5 object */
+#define MXT_RPTID_NOMSG 0xff
+
+/* MXT_GEN_COMMAND_T6 field */
+#define MXT_COMMAND_RESET 0
+#define MXT_COMMAND_BACKUPNV 1
+#define MXT_COMMAND_CALIBRATE 2
+#define MXT_COMMAND_REPORTALL 3
+#define MXT_COMMAND_DIAGNOSTIC 5
+
+/* Define for T6 status byte */
+#define MXT_T6_STATUS_RESET (1 << 7)
+#define MXT_T6_STATUS_OFL (1 << 6)
+#define MXT_T6_STATUS_SIGERR (1 << 5)
+#define MXT_T6_STATUS_CAL (1 << 4)
+#define MXT_T6_STATUS_CFGERR (1 << 3)
+#define MXT_T6_STATUS_COMSERR (1 << 2)
+
+/* MXT_GEN_POWER_T7 field */
+#define MXT_POWER_IDLEACQINT 0
+#define MXT_POWER_ACTVACQINT 1
+#define MXT_POWER_ACTV2IDLETO 2
+
+/* MXT_GEN_ACQUIRE_T8 field */
+#define MXT_ACQUIRE_CHRGTIME 0
+#define MXT_ACQUIRE_TCHDRIFT 2
+#define MXT_ACQUIRE_DRIFTST 3
+#define MXT_ACQUIRE_TCHAUTOCAL 4
+#define MXT_ACQUIRE_SYNC 5
+#define MXT_ACQUIRE_ATCHCALST 6
+#define MXT_ACQUIRE_ATCHCALSTHR 7
+
+/* MXT_TOUCH_MULTI_T9 field */
+#define MXT_TOUCH_CTRL 0
+#define MXT_T9_ORIENT 9
+#define MXT_T9_RANGE 18
+
+/* MXT_TOUCH_MULTI_T9 status */
+#define MXT_T9_UNGRIP (1 << 0)
+#define MXT_T9_SUPPRESS (1 << 1)
+#define MXT_T9_AMP (1 << 2)
+#define MXT_T9_VECTOR (1 << 3)
+#define MXT_T9_MOVE (1 << 4)
+#define MXT_T9_RELEASE (1 << 5)
+#define MXT_T9_PRESS (1 << 6)
+#define MXT_T9_DETECT (1 << 7)
+
+struct t9_range {
+ u16 x;
+ u16 y;
+} __packed;
+
+/* MXT_TOUCH_MULTI_T9 orient */
+#define MXT_T9_ORIENT_SWITCH (1 << 0)
+
+/* MXT_PROCI_GRIPFACE_T20 field */
+#define MXT_GRIPFACE_CTRL 0
+#define MXT_GRIPFACE_XLOGRIP 1
+#define MXT_GRIPFACE_XHIGRIP 2
+#define MXT_GRIPFACE_YLOGRIP 3
+#define MXT_GRIPFACE_YHIGRIP 4
+#define MXT_GRIPFACE_MAXTCHS 5
+#define MXT_GRIPFACE_SZTHR1 7
+#define MXT_GRIPFACE_SZTHR2 8
+#define MXT_GRIPFACE_SHPTHR1 9
+#define MXT_GRIPFACE_SHPTHR2 10
+#define MXT_GRIPFACE_SUPEXTTO 11
+
+/* MXT_PROCI_NOISE field */
+#define MXT_NOISE_CTRL 0
+#define MXT_NOISE_OUTFLEN 1
+#define MXT_NOISE_GCAFUL_LSB 3
+#define MXT_NOISE_GCAFUL_MSB 4
+#define MXT_NOISE_GCAFLL_LSB 5
+#define MXT_NOISE_GCAFLL_MSB 6
+#define MXT_NOISE_ACTVGCAFVALID 7
+#define MXT_NOISE_NOISETHR 8
+#define MXT_NOISE_FREQHOPSCALE 10
+#define MXT_NOISE_FREQ0 11
+#define MXT_NOISE_FREQ1 12
+#define MXT_NOISE_FREQ2 13
+#define MXT_NOISE_FREQ3 14
+#define MXT_NOISE_FREQ4 15
+#define MXT_NOISE_IDLEGCAFVALID 16
+
+/* MXT_SPT_COMMSCONFIG_T18 */
+#define MXT_COMMS_CTRL 0
+#define MXT_COMMS_CMD 1
+
+/* MXT_SPT_CTECONFIG_T28 field */
+#define MXT_CTE_CTRL 0
+#define MXT_CTE_CMD 1
+#define MXT_CTE_MODE 2
+#define MXT_CTE_IDLEGCAFDEPTH 3
+#define MXT_CTE_ACTVGCAFDEPTH 4
+#define MXT_CTE_VOLTAGE 5
+
+#define MXT_VOLTAGE_DEFAULT 2700000
+#define MXT_VOLTAGE_STEP 10000
+
+/* Define for MXT_GEN_COMMAND_T6 */
+#define MXT_BOOT_VALUE 0xa5
+#define MXT_RESET_VALUE 0x01
+#define MXT_BACKUP_VALUE 0x55
+
+/* T100 Multiple Touch Touchscreen */
+#define MXT_T100_CTRL 0
+#define MXT_T100_CFG1 1
+#define MXT_T100_TCHAUX 3
+#define MXT_T100_XRANGE 13
+#define MXT_T100_YRANGE 24
+
+#define MXT_T100_CFG_SWITCHXY BIT(5)
+
+#define MXT_T100_TCHAUX_VECT BIT(0)
+#define MXT_T100_TCHAUX_AMPL BIT(1)
+#define MXT_T100_TCHAUX_AREA BIT(2)
+
+#define MXT_T100_DETECT BIT(7)
+#define MXT_T100_TYPE_MASK 0x70
+
+enum t100_type {
+ MXT_T100_TYPE_FINGER = 1,
+ MXT_T100_TYPE_PASSIVE_STYLUS = 2,
+ MXT_T100_TYPE_HOVERING_FINGER = 4,
+ MXT_T100_TYPE_GLOVE = 5,
+ MXT_T100_TYPE_LARGE_TOUCH = 6,
+};
+
+#define MXT_DISTANCE_ACTIVE_TOUCH 0
+#define MXT_DISTANCE_HOVERING 1
+
+#define MXT_TOUCH_MAJOR_DEFAULT 1
+#define MXT_PRESSURE_DEFAULT 1
+
+/* Delay times */
+#define MXT_BACKUP_TIME 50 /* msec */
+#define MXT_RESET_TIME 200 /* msec */
+#define MXT_RESET_TIMEOUT 3000 /* msec */
+#define MXT_CRC_TIMEOUT 1000 /* msec */
+#define MXT_FW_RESET_TIME 3000 /* msec */
+#define MXT_FW_CHG_TIMEOUT 300 /* msec */
+
+/* Command to unlock bootloader */
+#define MXT_UNLOCK_CMD_MSB 0xaa
+#define MXT_UNLOCK_CMD_LSB 0xdc
+
+/* Bootloader mode status */
+#define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
+#define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
+#define MXT_FRAME_CRC_CHECK 0x02
+#define MXT_FRAME_CRC_FAIL 0x03
+#define MXT_FRAME_CRC_PASS 0x04
+#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
+#define MXT_BOOT_STATUS_MASK 0x3f
+#define MXT_BOOT_EXTENDED_ID (1 << 5)
+#define MXT_BOOT_ID_MASK 0x1f
+
+/* Touchscreen absolute values */
+#define MXT_MAX_AREA 0xff
+
+#define MXT_PIXELS_PER_MM 20
+
+struct mxt_info {
+ u8 family_id;
+ u8 variant_id;
+ u8 version;
+ u8 build;
+ u8 matrix_xsize;
+ u8 matrix_ysize;
+ u8 object_num;
+};
+
+struct mxt_object {
+ u8 type;
+ u16 start_address;
+ u8 size_minus_one;
+ u8 instances_minus_one;
+ u8 num_report_ids;
+} __packed;
+
+/* Each client has this additional data */
+struct mxt_data {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ char phys[64]; /* device physical location */
+ const struct mxt_platform_data *pdata;
+ struct mxt_object *object_table;
+ struct mxt_info info;
+ unsigned int irq;
+ unsigned int max_x;
+ unsigned int max_y;
+ bool in_bootloader;
+ u16 mem_size;
+ u8 t100_aux_ampl;
+ u8 t100_aux_area;
+ u8 t100_aux_vect;
+ u8 max_reportid;
+ u32 config_crc;
+ u32 info_crc;
+ u8 bootloader_addr;
+ u8 *msg_buf;
+ u8 t6_status;
+ bool update_input;
+ u8 last_message_count;
+ u8 num_touchids;
+ u8 multitouch;
+
+ /* Cached parameters from object table */
+ u16 T5_address;
+ u8 T5_msg_size;
+ u8 T6_reportid;
+ u16 T6_address;
+ u16 T7_address;
+ u8 T9_reportid_min;
+ u8 T9_reportid_max;
+ u8 T19_reportid;
+ u16 T44_address;
+ u8 T100_reportid_min;
+ u8 T100_reportid_max;
+
+ /* for fw update in bootloader */
+ struct completion bl_completion;
+
+ /* for reset handling */
+ struct completion reset_completion;
+
+ /* for config update handling */
+ struct completion crc_completion;
+};
+
+static size_t mxt_obj_size(const struct mxt_object *obj)
+{
+ return obj->size_minus_one + 1;
+}
+
+static size_t mxt_obj_instances(const struct mxt_object *obj)
+{
+ return obj->instances_minus_one + 1;
+}
+
+static bool mxt_object_readable(unsigned int type)
+{
+ switch (type) {
+ case MXT_GEN_COMMAND_T6:
+ case MXT_GEN_POWER_T7:
+ case MXT_GEN_ACQUIRE_T8:
+ case MXT_GEN_DATASOURCE_T53:
+ case MXT_TOUCH_MULTI_T9:
+ case MXT_TOUCH_KEYARRAY_T15:
+ case MXT_TOUCH_PROXIMITY_T23:
+ case MXT_TOUCH_PROXKEY_T52:
+ case MXT_PROCI_GRIPFACE_T20:
+ case MXT_PROCG_NOISE_T22:
+ case MXT_PROCI_ONETOUCH_T24:
+ case MXT_PROCI_TWOTOUCH_T27:
+ case MXT_PROCI_GRIP_T40:
+ case MXT_PROCI_PALM_T41:
+ case MXT_PROCI_TOUCHSUPPRESSION_T42:
+ case MXT_PROCI_STYLUS_T47:
+ case MXT_PROCG_NOISESUPPRESSION_T48:
+ case MXT_SPT_COMMSCONFIG_T18:
+ case MXT_SPT_GPIOPWM_T19:
+ case MXT_SPT_SELFTEST_T25:
+ case MXT_SPT_CTECONFIG_T28:
+ case MXT_SPT_USERDATA_T38:
+ case MXT_SPT_DIGITIZER_T43:
+ case MXT_SPT_CTECONFIG_T46:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static void mxt_dump_message(struct mxt_data *data, u8 *message)
+{
+ dev_dbg(&data->client->dev, "message: %*ph\n",
+ data->T5_msg_size, message);
+}
+
+static int mxt_wait_for_completion(struct mxt_data *data,
+ struct completion *comp,
+ unsigned int timeout_ms)
+{
+ struct device *dev = &data->client->dev;
+ unsigned long timeout = msecs_to_jiffies(timeout_ms);
+ long ret;
+
+ ret = wait_for_completion_interruptible_timeout(comp, timeout);
+ if (ret < 0) {
+ return ret;
+ } else if (ret == 0) {
+ dev_err(dev, "Wait for completion timed out.\n");
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+static int mxt_bootloader_read(struct mxt_data *data,
+ u8 *val, unsigned int count)
+{
+ int ret;
+ struct i2c_msg msg;
+
+ msg.addr = data->bootloader_addr;
+ msg.flags = data->client->flags & I2C_M_TEN;
+ msg.flags |= I2C_M_RD;
+ msg.len = count;
+ msg.buf = val;
+
+ ret = i2c_transfer(data->client->adapter, &msg, 1);
+ if (ret == 1) {
+ ret = 0;
+ } else {
+ ret = ret < 0 ? ret : -EIO;
+ dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
+ __func__, ret);
+ }
+
+ return ret;
+}
+
+static int mxt_bootloader_write(struct mxt_data *data,
+ const u8 * const val, unsigned int count)
+{
+ int ret;
+ struct i2c_msg msg;
+
+ msg.addr = data->bootloader_addr;
+ msg.flags = data->client->flags & I2C_M_TEN;
+ msg.len = count;
+ msg.buf = (u8 *)val;
+
+ ret = i2c_transfer(data->client->adapter, &msg, 1);
+ if (ret == 1) {
+ ret = 0;
+ } else {
+ ret = ret < 0 ? ret : -EIO;
+ dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
+ __func__, ret);
+ }
+
+ return ret;
+}
+
+static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
+{
+ u8 appmode = data->client->addr;
+ u8 bootloader;
+
+ switch (appmode) {
+ case 0x4a:
+ case 0x4b:
+ /* Chips after 1664S use different scheme */
+ if (retry || data->info.family_id >= 0xa2) {
+ bootloader = appmode - 0x24;
+ break;
+ }
+ /* Fall through for normal case */
+ case 0x4c:
+ case 0x4d:
+ case 0x5a:
+ case 0x5b:
+ bootloader = appmode - 0x26;
+ break;
+
+ default:
+ dev_err(&data->client->dev,
+ "Appmode i2c address 0x%02x not found\n",
+ appmode);
+ return -EINVAL;
+ }
+
+ data->bootloader_addr = bootloader;
+ return 0;
+}
+
+static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
+{
+ struct device *dev = &data->client->dev;
+ int error;
+ u8 val;
+ bool crc_failure;
+
+ error = mxt_lookup_bootloader_address(data, alt_address);
+ if (error)
+ return error;
+
+ error = mxt_bootloader_read(data, &val, 1);
+ if (error)
+ return error;
+
+ /* Check app crc fail mode */
+ crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
+
+ dev_err(dev, "Detected bootloader, status:%02X%s\n",
+ val, crc_failure ? ", APP_CRC_FAIL" : "");
+
+ return 0;
+}
+
+static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
+{
+ struct device *dev = &data->client->dev;
+ u8 buf[3];
+
+ if (val & MXT_BOOT_EXTENDED_ID) {
+ if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
+ dev_err(dev, "%s: i2c failure\n", __func__);
+ return val;
+ }
+
+ dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
+
+ return buf[0];
+ } else {
+ dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
+
+ return val;
+ }
+}
+
+static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
+ bool wait)
+{
+ struct device *dev = &data->client->dev;
+ u8 val;
+ int ret;
+
+recheck:
+ if (wait) {
+ /*
+ * In application update mode, the interrupt
+ * line signals state transitions. We must wait for the
+ * CHG assertion before reading the status byte.
+ * Once the status byte has been read, the line is deasserted.
+ */
+ ret = mxt_wait_for_completion(data, &data->bl_completion,
+ MXT_FW_CHG_TIMEOUT);
+ if (ret) {
+ /*
+ * TODO: handle -ERESTARTSYS better by terminating
+ * fw update process before returning to userspace
+ * by writing length 0x000 to device (iff we are in
+ * WAITING_FRAME_DATA state).
+ */
+ dev_err(dev, "Update wait error %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = mxt_bootloader_read(data, &val, 1);
+ if (ret)
+ return ret;
+
+ if (state == MXT_WAITING_BOOTLOAD_CMD)
+ val = mxt_get_bootloader_version(data, val);
+
+ switch (state) {
+ case MXT_WAITING_BOOTLOAD_CMD:
+ case MXT_WAITING_FRAME_DATA:
+ case MXT_APP_CRC_FAIL:
+ val &= ~MXT_BOOT_STATUS_MASK;
+ break;
+ case MXT_FRAME_CRC_PASS:
+ if (val == MXT_FRAME_CRC_CHECK) {
+ goto recheck;
+ } else if (val == MXT_FRAME_CRC_FAIL) {
+ dev_err(dev, "Bootloader CRC fail\n");
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (val != state) {
+ dev_err(dev, "Invalid bootloader state %02X != %02X\n",
+ val, state);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
+{
+ int ret;
+ u8 buf[2];
+
+ if (unlock) {
+ buf[0] = MXT_UNLOCK_CMD_LSB;
+ buf[1] = MXT_UNLOCK_CMD_MSB;
+ } else {
+ buf[0] = 0x01;
+ buf[1] = 0x01;
+ }
+
+ ret = mxt_bootloader_write(data, buf, 2);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int __mxt_read_reg(struct i2c_client *client,
+ u16 reg, u16 len, void *val)
+{
+ struct i2c_msg xfer[2];
+ u8 buf[2];
+ int ret;
+
+ buf[0] = reg & 0xff;
+ buf[1] = (reg >> 8) & 0xff;
+
+ /* Write register */
+ xfer[0].addr = client->addr;
+ xfer[0].flags = 0;
+ xfer[0].len = 2;
+ xfer[0].buf = buf;
+
+ /* Read data */
+ xfer[1].addr = client->addr;
+ xfer[1].flags = I2C_M_RD;
+ xfer[1].len = len;
+ xfer[1].buf = val;
+
+ ret = i2c_transfer(client->adapter, xfer, 2);
+ if (ret == 2) {
+ ret = 0;
+ } else {
+ if (ret >= 0)
+ ret = -EIO;
+ dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
+ __func__, ret);
+ }
+
+ return ret;
+}
+
+static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
+ const void *val)
+{
+ u8 *buf;
+ size_t count;
+ int ret;
+
+ count = len + 2;
+ buf = kmalloc(count, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ buf[0] = reg & 0xff;
+ buf[1] = (reg >> 8) & 0xff;
+ memcpy(&buf[2], val, len);
+
+ ret = i2c_master_send(client, buf, count);
+ if (ret == count) {
+ ret = 0;
+ } else {
+ if (ret >= 0)
+ ret = -EIO;
+ dev_err(&client->dev, "%s: i2c send failed (%d)\n",
+ __func__, ret);
+ }
+
+ kfree(buf);
+ return ret;
+}
+
+static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
+{
+ return __mxt_write_reg(client, reg, 1, &val);
+}
+
+static struct mxt_object *
+mxt_get_object(struct mxt_data *data, u8 type)
+{
+ struct mxt_object *object;
+ int i;
+
+ for (i = 0; i < data->info.object_num; i++) {
+ object = data->object_table + i;
+ if (object->type == type)
+ return object;
+ }
+
+ dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
+ return NULL;
+}
+
+static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
+{
+ struct device *dev = &data->client->dev;
+ u8 status = msg[1];
+ u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
+
+ complete(&data->crc_completion);
+
+ if (crc != data->config_crc) {
+ data->config_crc = crc;
+ dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
+ }
+
+ /* Detect reset */
+ if (status & MXT_T6_STATUS_RESET)
+ complete(&data->reset_completion);
+
+ /* Output debug if status has changed */
+ if (status != data->t6_status)
+ dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
+ status,
+ status == 0 ? " OK" : "",
+ status & MXT_T6_STATUS_RESET ? " RESET" : "",
+ status & MXT_T6_STATUS_OFL ? " OFL" : "",
+ status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
+ status & MXT_T6_STATUS_CAL ? " CAL" : "",
+ status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
+ status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
+
+ /* Save current status */
+ data->t6_status = status;
+}
+
+static int mxt_write_object(struct mxt_data *data,
+ u8 type, u8 offset, u8 val)
+{
+ struct mxt_object *object;
+ u16 reg;
+
+ object = mxt_get_object(data, type);
+ if (!object || offset >= mxt_obj_size(object))
+ return -EINVAL;
+
+ reg = object->start_address;
+ return mxt_write_reg(data->client, reg + offset, val);
+}
+
+static void mxt_input_button(struct mxt_data *data, u8 *message)
+{
+ struct input_dev *input = data->input_dev;
+ const struct mxt_platform_data *pdata = data->pdata;
+ bool button;
+ int i;
+
+ /* Active-low switch */
+ for (i = 0; i < pdata->t19_num_keys; i++) {
+ if (pdata->t19_keymap[i] == KEY_RESERVED)
+ continue;
+ button = !(message[1] & (1 << i));
+ input_report_key(input, pdata->t19_keymap[i], button);
+ }
+}
+
+static void mxt_input_sync(struct mxt_data *data)
+{
+ input_mt_report_pointer_emulation(data->input_dev,
+ data->pdata->t19_num_keys);
+ input_sync(data->input_dev);
+}
+
+static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
+{
+ struct device *dev = &data->client->dev;
+ struct input_dev *input_dev = data->input_dev;
+ int id;
+ u8 status;
+ int x;
+ int y;
+ int area;
+ int amplitude;
+
+ id = message[0] - data->T9_reportid_min;
+ status = message[1];
+ x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
+ y = (message[3] << 4) | ((message[4] & 0xf));
+
+ /* Handle 10/12 bit switching */
+ if (data->max_x < 1024)
+ x >>= 2;
+ if (data->max_y < 1024)
+ y >>= 2;
+
+ area = message[5];
+ amplitude = message[6];
+
+ dev_dbg(dev,
+ "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
+ id,
+ (status & MXT_T9_DETECT) ? 'D' : '.',
+ (status & MXT_T9_PRESS) ? 'P' : '.',
+ (status & MXT_T9_RELEASE) ? 'R' : '.',
+ (status & MXT_T9_MOVE) ? 'M' : '.',
+ (status & MXT_T9_VECTOR) ? 'V' : '.',
+ (status & MXT_T9_AMP) ? 'A' : '.',
+ (status & MXT_T9_SUPPRESS) ? 'S' : '.',
+ (status & MXT_T9_UNGRIP) ? 'U' : '.',
+ x, y, area, amplitude);
+
+ input_mt_slot(input_dev, id);
+
+ if (status & MXT_T9_DETECT) {
+ /*
+ * Multiple bits may be set if the host is slow to read
+ * the status messages, indicating all the events that
+ * have happened.
+ */
+ if (status & MXT_T9_RELEASE) {
+ input_mt_report_slot_state(input_dev,
+ MT_TOOL_FINGER, 0);
+ mxt_input_sync(data);
+ }
+
+ /* Touch active */
+ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
+ input_report_abs(input_dev, ABS_MT_POSITION_X, x);
+ input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
+ input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
+ input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
+ } else {
+ /* Touch no longer active, close out slot */
+ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
+ }
+
+ data->update_input = true;
+}
+
+static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
+{
+ struct device *dev = &data->client->dev;
+ struct input_dev *input_dev = data->input_dev;
+ int id;
+ u8 status;
+ u8 type = 0;
+ u16 x;
+ u16 y;
+ int distance = 0;
+ int tool = 0;
+ u8 major = 0;
+ u8 pressure = 0;
+ u8 orientation = 0;
+
+ id = message[0] - data->T100_reportid_min - 2;
+
+ /* ignore SCRSTATUS events */
+ if (id < 0)
+ return;
+
+ status = message[1];
+ x = get_unaligned_le16(&message[2]);
+ y = get_unaligned_le16(&message[4]);
+
+ if (status & MXT_T100_DETECT) {
+ type = (status & MXT_T100_TYPE_MASK) >> 4;
+
+ switch (type) {
+ case MXT_T100_TYPE_HOVERING_FINGER:
+ tool = MT_TOOL_FINGER;
+ distance = MXT_DISTANCE_HOVERING;
+
+ if (data->t100_aux_vect)
+ orientation = message[data->t100_aux_vect];
+
+ break;
+
+ case MXT_T100_TYPE_FINGER:
+ case MXT_T100_TYPE_GLOVE:
+ tool = MT_TOOL_FINGER;
+ distance = MXT_DISTANCE_ACTIVE_TOUCH;
+
+ if (data->t100_aux_area)
+ major = message[data->t100_aux_area];
+
+ if (data->t100_aux_ampl)
+ pressure = message[data->t100_aux_ampl];
+
+ if (data->t100_aux_vect)
+ orientation = message[data->t100_aux_vect];
+
+ break;
+
+ case MXT_T100_TYPE_PASSIVE_STYLUS:
+ tool = MT_TOOL_PEN;
+
+ /*
+ * Passive stylus is reported with size zero so
+ * hardcode.
+ */
+ major = MXT_TOUCH_MAJOR_DEFAULT;
+
+ if (data->t100_aux_ampl)
+ pressure = message[data->t100_aux_ampl];
+
+ break;
+
+ case MXT_T100_TYPE_LARGE_TOUCH:
+ /* Ignore suppressed touch */
+ break;
+
+ default:
+ dev_dbg(dev, "Unexpected T100 type\n");
+ return;
+ }
+ }
+
+ /*
+ * Values reported should be non-zero if tool is touching the
+ * device
+ */
+ if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
+ pressure = MXT_PRESSURE_DEFAULT;
+
+ input_mt_slot(input_dev, id);
+
+ if (status & MXT_T100_DETECT) {
+ dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
+ id, type, x, y, major, pressure, orientation);
+
+ input_mt_report_slot_state(input_dev, tool, 1);
+ input_report_abs(input_dev, ABS_MT_POSITION_X, x);
+ input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
+ input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
+ input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
+ input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
+ input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
+ } else {
+ dev_dbg(dev, "[%u] release\n", id);
+
+ /* close out slot */
+ input_mt_report_slot_state(input_dev, 0, 0);
+ }
+
+ data->update_input = true;
+}
+
+static int mxt_proc_message(struct mxt_data *data, u8 *message)
+{
+ u8 report_id = message[0];
+
+ if (report_id == MXT_RPTID_NOMSG)
+ return 0;
+
+ if (report_id == data->T6_reportid) {
+ mxt_proc_t6_messages(data, message);
+ } else if (!data->input_dev) {
+ /*
+ * Do not report events if input device
+ * is not yet registered.
+ */
+ mxt_dump_message(data, message);
+ } else if (report_id >= data->T9_reportid_min &&
+ report_id <= data->T9_reportid_max) {
+ mxt_proc_t9_message(data, message);
+ } else if (report_id >= data->T100_reportid_min &&
+ report_id <= data->T100_reportid_max) {
+ mxt_proc_t100_message(data, message);
+ } else if (report_id == data->T19_reportid) {
+ mxt_input_button(data, message);
+ data->update_input = true;
+ } else {
+ mxt_dump_message(data, message);
+ }
+
+ return 1;
+}
+
+static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
+{
+ struct device *dev = &data->client->dev;
+ int ret;
+ int i;
+ u8 num_valid = 0;
+
+ /* Safety check for msg_buf */
+ if (count > data->max_reportid)
+ return -EINVAL;
+
+ /* Process remaining messages if necessary */
+ ret = __mxt_read_reg(data->client, data->T5_address,
+ data->T5_msg_size * count, data->msg_buf);
+ if (ret) {
+ dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
+ return ret;
+ }
+
+ for (i = 0; i < count; i++) {
+ ret = mxt_proc_message(data,
+ data->msg_buf + data->T5_msg_size * i);
+
+ if (ret == 1)
+ num_valid++;
+ }
+
+ /* return number of messages read */
+ return num_valid;
+}
+
+static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
+{
+ struct device *dev = &data->client->dev;
+ int ret;
+ u8 count, num_left;
+
+ /* Read T44 and T5 together */
+ ret = __mxt_read_reg(data->client, data->T44_address,
+ data->T5_msg_size + 1, data->msg_buf);
+ if (ret) {
+ dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
+ return IRQ_NONE;
+ }
+
+ count = data->msg_buf[0];
+
+ if (count == 0) {
+ /*
+ * This condition is caused by the CHG line being configured
+ * in Mode 0. It results in unnecessary I2C operations but it
+ * is benign.
+ */
+ dev_dbg(dev, "Interrupt triggered but zero messages\n");
+ return IRQ_NONE;
+ } else if (count > data->max_reportid) {
+ dev_err(dev, "T44 count %d exceeded max report id\n", count);
+ count = data->max_reportid;
+ }
+
+ /* Process first message */
+ ret = mxt_proc_message(data, data->msg_buf + 1);
+ if (ret < 0) {
+ dev_warn(dev, "Unexpected invalid message\n");
+ return IRQ_NONE;
+ }
+
+ num_left = count - 1;
+
+ /* Process remaining messages if necessary */
+ if (num_left) {
+ ret = mxt_read_and_process_messages(data, num_left);
+ if (ret < 0)
+ goto end;
+ else if (ret != num_left)
+ dev_warn(dev, "Unexpected invalid message\n");
+ }
+
+end:
+ if (data->update_input) {
+ mxt_input_sync(data);
+ data->update_input = false;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int mxt_process_messages_until_invalid(struct mxt_data *data)
+{
+ struct device *dev = &data->client->dev;
+ int count, read;
+ u8 tries = 2;
+
+ count = data->max_reportid;
+
+ /* Read messages until we force an invalid */
+ do {
+ read = mxt_read_and_process_messages(data, count);
+ if (read < count)
+ return 0;
+ } while (--tries);
+
+ if (data->update_input) {
+ mxt_input_sync(data);
+ data->update_input = false;
+ }
+
+ dev_err(dev, "CHG pin isn't cleared\n");
+ return -EBUSY;
+}
+
+static irqreturn_t mxt_process_messages(struct mxt_data *data)
+{
+ int total_handled, num_handled;
+ u8 count = data->last_message_count;
+
+ if (count < 1 || count > data->max_reportid)
+ count = 1;
+
+ /* include final invalid message */
+ total_handled = mxt_read_and_process_messages(data, count + 1);
+ if (total_handled < 0)
+ return IRQ_NONE;
+ /* if there were invalid messages, then we are done */
+ else if (total_handled <= count)
+ goto update_count;
+
+ /* keep reading two msgs until one is invalid or reportid limit */
+ do {
+ num_handled = mxt_read_and_process_messages(data, 2);
+ if (num_handled < 0)
+ return IRQ_NONE;
+
+ total_handled += num_handled;
+
+ if (num_handled < 2)
+ break;
+ } while (total_handled < data->num_touchids);
+
+update_count:
+ data->last_message_count = total_handled;
+
+ if (data->update_input) {
+ mxt_input_sync(data);
+ data->update_input = false;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mxt_interrupt(int irq, void *dev_id)
+{
+ struct mxt_data *data = dev_id;
+
+ if (data->in_bootloader) {
+ /* bootloader state transition completion */
+ complete(&data->bl_completion);
+ return IRQ_HANDLED;
+ }
+
+ if (!data->object_table)
+ return IRQ_HANDLED;
+
+ if (data->T44_address) {
+ return mxt_process_messages_t44(data);
+ } else {
+ return mxt_process_messages(data);
+ }
+}
+
+static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
+ u8 value, bool wait)
+{
+ u16 reg;
+ u8 command_register;
+ int timeout_counter = 0;
+ int ret;
+
+ reg = data->T6_address + cmd_offset;
+
+ ret = mxt_write_reg(data->client, reg, value);
+ if (ret)
+ return ret;
+
+ if (!wait)
+ return 0;
+
+ do {
+ msleep(20);
+ ret = __mxt_read_reg(data->client, reg, 1, &command_register);
+ if (ret)
+ return ret;
+ } while (command_register != 0 && timeout_counter++ <= 100);
+
+ if (timeout_counter > 100) {
+ dev_err(&data->client->dev, "Command failed!\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int mxt_soft_reset(struct mxt_data *data)
+{
+ struct device *dev = &data->client->dev;
+ int ret = 0;
+
+ dev_info(dev, "Resetting chip\n");
+
+ reinit_completion(&data->reset_completion);
+
+ ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
+ if (ret)
+ return ret;
+
+ ret = mxt_wait_for_completion(data, &data->reset_completion,
+ MXT_RESET_TIMEOUT);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
+{
+ /*
+ * On failure, CRC is set to 0 and config will always be
+ * downloaded.
+ */
+ data->config_crc = 0;
+ reinit_completion(&data->crc_completion);
+
+ mxt_t6_command(data, cmd, value, true);
+
+ /*
+ * Wait for crc message. On failure, CRC is set to 0 and config will
+ * always be downloaded.
+ */
+ mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
+}
+
+static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
+{
+ static const unsigned int crcpoly = 0x80001B;
+ u32 result;
+ u32 data_word;
+
+ data_word = (secondbyte << 8) | firstbyte;
+ result = ((*crc << 1) ^ data_word);
+
+ if (result & 0x1000000)
+ result ^= crcpoly;
+
+ *crc = result;
+}
+
+static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
+{
+ u32 crc = 0;
+ u8 *ptr = base + start_off;
+ u8 *last_val = base + end_off - 1;
+
+ if (end_off < start_off)
+ return -EINVAL;
+
+ while (ptr < last_val) {
+ mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
+ ptr += 2;
+ }
+
+ /* if len is odd, fill the last byte with 0 */
+ if (ptr == last_val)
+ mxt_calc_crc24(&crc, *ptr, 0);
+
+ /* Mask to 24-bit */
+ crc &= 0x00FFFFFF;
+
+ return crc;
+}
+
+static int mxt_prepare_cfg_mem(struct mxt_data *data,
+ const struct firmware *cfg,
+ unsigned int data_pos,
+ unsigned int cfg_start_ofs,
+ u8 *config_mem,
+ size_t config_mem_size)
+{
+ struct device *dev = &data->client->dev;
+ struct mxt_object *object;
+ unsigned int type, instance, size, byte_offset;
+ int offset;
+ int ret;
+ int i;
+ u16 reg;
+ u8 val;
+
+ while (data_pos < cfg->size) {
+ /* Read type, instance, length */
+ ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
+ &type, &instance, &size, &offset);
+ if (ret == 0) {
+ /* EOF */
+ break;
+ } else if (ret != 3) {
+ dev_err(dev, "Bad format: failed to parse object\n");
+ return -EINVAL;
+ }
+ data_pos += offset;
+
+ object = mxt_get_object(data, type);
+ if (!object) {
+ /* Skip object */
+ for (i = 0; i < size; i++) {
+ ret = sscanf(cfg->data + data_pos, "%hhx%n",
+ &val, &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format in T%d at %d\n",
+ type, i);
+ return -EINVAL;
+ }
+ data_pos += offset;
+ }
+ continue;
+ }
+
+ if (size > mxt_obj_size(object)) {
+ /*
+ * Either we are in fallback mode due to wrong
+ * config or config from a later fw version,
+ * or the file is corrupt or hand-edited.
+ */
+ dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
+ size - mxt_obj_size(object), type);
+ } else if (mxt_obj_size(object) > size) {
+ /*
+ * If firmware is upgraded, new bytes may be added to
+ * end of objects. It is generally forward compatible
+ * to zero these bytes - previous behaviour will be
+ * retained. However this does invalidate the CRC and
+ * will force fallback mode until the configuration is
+ * updated. We warn here but do nothing else - the
+ * malloc has zeroed the entire configuration.
+ */
+ dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
+ mxt_obj_size(object) - size, type);
+ }
+
+ if (instance >= mxt_obj_instances(object)) {
+ dev_err(dev, "Object instances exceeded!\n");
+ return -EINVAL;
+ }
+
+ reg = object->start_address + mxt_obj_size(object) * instance;
+
+ for (i = 0; i < size; i++) {
+ ret = sscanf(cfg->data + data_pos, "%hhx%n",
+ &val,
+ &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format in T%d at %d\n",
+ type, i);
+ return -EINVAL;
+ }
+ data_pos += offset;
+
+ if (i > mxt_obj_size(object))
+ continue;
+
+ byte_offset = reg + i - cfg_start_ofs;
+
+ if (byte_offset >= 0 && byte_offset < config_mem_size) {
+ *(config_mem + byte_offset) = val;
+ } else {
+ dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
+ reg, object->type, byte_offset);
+ return -EINVAL;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
+ u8 *config_mem, size_t config_mem_size)
+{
+ unsigned int byte_offset = 0;
+ int error;
+
+ /* Write configuration as blocks */
+ while (byte_offset < config_mem_size) {
+ unsigned int size = config_mem_size - byte_offset;
+
+ if (size > MXT_MAX_BLOCK_WRITE)
+ size = MXT_MAX_BLOCK_WRITE;
+
+ error = __mxt_write_reg(data->client,
+ cfg_start + byte_offset,
+ size, config_mem + byte_offset);
+ if (error) {
+ dev_err(&data->client->dev,
+ "Config write error, ret=%d\n", error);
+ return error;
+ }
+
+ byte_offset += size;
+ }
+
+ return 0;
+}
+
+/*
+ * mxt_update_cfg - download configuration to chip
+ *
+ * Atmel Raw Config File Format
+ *
+ * The first four lines of the raw config file contain:
+ * 1) Version
+ * 2) Chip ID Information (first 7 bytes of device memory)
+ * 3) Chip Information Block 24-bit CRC Checksum
+ * 4) Chip Configuration 24-bit CRC Checksum
+ *
+ * The rest of the file consists of one line per object instance:
+ * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
+ *
+ * <TYPE> - 2-byte object type as hex
+ * <INSTANCE> - 2-byte object instance number as hex
+ * <SIZE> - 2-byte object size as hex
+ * <CONTENTS> - array of <SIZE> 1-byte hex values
+ */
+static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
+{
+ struct device *dev = &data->client->dev;
+ struct mxt_info cfg_info;
+ int ret;
+ int offset;
+ int data_pos;
+ int i;
+ int cfg_start_ofs;
+ u32 info_crc, config_crc, calculated_crc;
+ u8 *config_mem;
+ size_t config_mem_size;
+
+ mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
+
+ if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
+ dev_err(dev, "Unrecognised config file\n");
+ return -EINVAL;
+ }
+
+ data_pos = strlen(MXT_CFG_MAGIC);
+
+ /* Load information block and check */
+ for (i = 0; i < sizeof(struct mxt_info); i++) {
+ ret = sscanf(cfg->data + data_pos, "%hhx%n",
+ (unsigned char *)&cfg_info + i,
+ &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format\n");
+ return -EINVAL;
+ }
+
+ data_pos += offset;
+ }
+
+ if (cfg_info.family_id != data->info.family_id) {
+ dev_err(dev, "Family ID mismatch!\n");
+ return -EINVAL;
+ }
+
+ if (cfg_info.variant_id != data->info.variant_id) {
+ dev_err(dev, "Variant ID mismatch!\n");
+ return -EINVAL;
+ }
+
+ /* Read CRCs */
+ ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format: failed to parse Info CRC\n");
+ return -EINVAL;
+ }
+ data_pos += offset;
+
+ ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format: failed to parse Config CRC\n");
+ return -EINVAL;
+ }
+ data_pos += offset;
+
+ /*
+ * The Info Block CRC is calculated over mxt_info and the object
+ * table. If it does not match then we are trying to load the
+ * configuration from a different chip or firmware version, so
+ * the configuration CRC is invalid anyway.
+ */
+ if (info_crc == data->info_crc) {
+ if (config_crc == 0 || data->config_crc == 0) {
+ dev_info(dev, "CRC zero, attempting to apply config\n");
+ } else if (config_crc == data->config_crc) {
+ dev_dbg(dev, "Config CRC 0x%06X: OK\n",
+ data->config_crc);
+ return 0;
+ } else {
+ dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
+ data->config_crc, config_crc);
+ }
+ } else {
+ dev_warn(dev,
+ "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
+ data->info_crc, info_crc);
+ }
+
+ /* Malloc memory to store configuration */
+ cfg_start_ofs = MXT_OBJECT_START +
+ data->info.object_num * sizeof(struct mxt_object) +
+ MXT_INFO_CHECKSUM_SIZE;
+ config_mem_size = data->mem_size - cfg_start_ofs;
+ config_mem = kzalloc(config_mem_size, GFP_KERNEL);
+ if (!config_mem) {
+ dev_err(dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
+ config_mem, config_mem_size);
+ if (ret)
+ goto release_mem;
+
+ /* Calculate crc of the received configs (not the raw config file) */
+ if (data->T7_address < cfg_start_ofs) {
+ dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
+ data->T7_address, cfg_start_ofs);
+ ret = 0;
+ goto release_mem;
+ }
+
+ calculated_crc = mxt_calculate_crc(config_mem,
+ data->T7_address - cfg_start_ofs,
+ config_mem_size);
+
+ if (config_crc > 0 && config_crc != calculated_crc)
+ dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
+ calculated_crc, config_crc);
+
+ ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
+ config_mem, config_mem_size);
+ if (ret)
+ goto release_mem;
+
+ mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
+
+ ret = mxt_soft_reset(data);
+ if (ret)
+ goto release_mem;
+
+ dev_info(dev, "Config successfully updated\n");
+
+release_mem:
+ kfree(config_mem);
+ return ret;
+}
+
+static int mxt_acquire_irq(struct mxt_data *data)
+{
+ int error;
+
+ enable_irq(data->irq);
+
+ error = mxt_process_messages_until_invalid(data);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static int mxt_get_info(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ struct mxt_info *info = &data->info;
+ int error;
+
+ /* Read 7-byte info block starting at address 0 */
+ error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static void mxt_free_input_device(struct mxt_data *data)
+{
+ if (data->input_dev) {
+ input_unregister_device(data->input_dev);
+ data->input_dev = NULL;
+ }
+}
+
+static void mxt_free_object_table(struct mxt_data *data)
+{
+ kfree(data->object_table);
+ data->object_table = NULL;
+ kfree(data->msg_buf);
+ data->msg_buf = NULL;
+ data->T5_address = 0;
+ data->T5_msg_size = 0;
+ data->T6_reportid = 0;
+ data->T7_address = 0;
+ data->T9_reportid_min = 0;
+ data->T9_reportid_max = 0;
+ data->T19_reportid = 0;
+ data->T44_address = 0;
+ data->T100_reportid_min = 0;
+ data->T100_reportid_max = 0;
+ data->max_reportid = 0;
+}
+
+static int mxt_get_object_table(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ size_t table_size;
+ struct mxt_object *object_table;
+ int error;
+ int i;
+ u8 reportid;
+ u16 end_address;
+
+ table_size = data->info.object_num * sizeof(struct mxt_object);
+ object_table = kzalloc(table_size, GFP_KERNEL);
+ if (!object_table) {
+ dev_err(&data->client->dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
+ object_table);
+ if (error) {
+ kfree(object_table);
+ return error;
+ }
+
+ /* Valid Report IDs start counting from 1 */
+ reportid = 1;
+ data->mem_size = 0;
+ for (i = 0; i < data->info.object_num; i++) {
+ struct mxt_object *object = object_table + i;
+ u8 min_id, max_id;
+
+ le16_to_cpus(&object->start_address);
+
+ if (object->num_report_ids) {
+ min_id = reportid;
+ reportid += object->num_report_ids *
+ mxt_obj_instances(object);
+ max_id = reportid - 1;
+ } else {
+ min_id = 0;
+ max_id = 0;
+ }
+
+ dev_dbg(&data->client->dev,
+ "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
+ object->type, object->start_address,
+ mxt_obj_size(object), mxt_obj_instances(object),
+ min_id, max_id);
+
+ switch (object->type) {
+ case MXT_GEN_MESSAGE_T5:
+ if (data->info.family_id == 0x80 &&
+ data->info.version < 0x20) {
+ /*
+ * On mXT224 firmware versions prior to V2.0
+ * read and discard unused CRC byte otherwise
+ * DMA reads are misaligned.
+ */
+ data->T5_msg_size = mxt_obj_size(object);
+ } else {
+ /* CRC not enabled, so skip last byte */
+ data->T5_msg_size = mxt_obj_size(object) - 1;
+ }
+ data->T5_address = object->start_address;
+ break;
+ case MXT_GEN_COMMAND_T6:
+ data->T6_reportid = min_id;
+ data->T6_address = object->start_address;
+ break;
+ case MXT_GEN_POWER_T7:
+ data->T7_address = object->start_address;
+ break;
+ case MXT_TOUCH_MULTI_T9:
+ data->multitouch = MXT_TOUCH_MULTI_T9;
+ data->T9_reportid_min = min_id;
+ data->T9_reportid_max = max_id;
+ data->num_touchids = object->num_report_ids
+ * mxt_obj_instances(object);
+ break;
+ case MXT_SPT_MESSAGECOUNT_T44:
+ data->T44_address = object->start_address;
+ break;
+ case MXT_SPT_GPIOPWM_T19:
+ data->T19_reportid = min_id;
+ break;
+ case MXT_TOUCH_MULTITOUCHSCREEN_T100:
+ data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
+ data->T100_reportid_min = min_id;
+ data->T100_reportid_max = max_id;
+ /* first two report IDs reserved */
+ data->num_touchids = object->num_report_ids - 2;
+ break;
+ }
+
+ end_address = object->start_address
+ + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
+
+ if (end_address >= data->mem_size)
+ data->mem_size = end_address + 1;
+ }
+
+ /* Store maximum reportid */
+ data->max_reportid = reportid;
+
+ /* If T44 exists, T5 position has to be directly after */
+ if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
+ dev_err(&client->dev, "Invalid T44 position\n");
+ error = -EINVAL;
+ goto free_object_table;
+ }
+
+ data->msg_buf = kcalloc(data->max_reportid,
+ data->T5_msg_size, GFP_KERNEL);
+ if (!data->msg_buf) {
+ dev_err(&client->dev, "Failed to allocate message buffer\n");
+ error = -ENOMEM;
+ goto free_object_table;
+ }
+
+ data->object_table = object_table;
+
+ return 0;
+
+free_object_table:
+ mxt_free_object_table(data);
+ return error;
+}
+
+static int mxt_read_t9_resolution(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ int error;
+ struct t9_range range;
+ unsigned char orient;
+ struct mxt_object *object;
+
+ object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
+ if (!object)
+ return -EINVAL;
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T9_RANGE,
+ sizeof(range), &range);
+ if (error)
+ return error;
+
+ le16_to_cpus(&range.x);
+ le16_to_cpus(&range.y);
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T9_ORIENT,
+ 1, &orient);
+ if (error)
+ return error;
+
+ /* Handle default values */
+ if (range.x == 0)
+ range.x = 1023;
+
+ if (range.y == 0)
+ range.y = 1023;
+
+ if (orient & MXT_T9_ORIENT_SWITCH) {
+ data->max_x = range.y;
+ data->max_y = range.x;
+ } else {
+ data->max_x = range.x;
+ data->max_y = range.y;
+ }
+
+ dev_dbg(&client->dev,
+ "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
+
+ return 0;
+}
+
+static int mxt_read_t100_config(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ int error;
+ struct mxt_object *object;
+ u16 range_x, range_y;
+ u8 cfg, tchaux;
+ u8 aux;
+
+ object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
+ if (!object)
+ return -EINVAL;
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_XRANGE,
+ sizeof(range_x), &range_x);
+ if (error)
+ return error;
+
+ le16_to_cpus(&range_x);
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_YRANGE,
+ sizeof(range_y), &range_y);
+ if (error)
+ return error;
+
+ le16_to_cpus(&range_y);
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_CFG1,
+ 1, &cfg);
+ if (error)
+ return error;
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_TCHAUX,
+ 1, &tchaux);
+ if (error)
+ return error;
+
+ /* Handle default values */
+ if (range_x == 0)
+ range_x = 1023;
+
+ if (range_y == 0)
+ range_y = 1023;
+
+ if (cfg & MXT_T100_CFG_SWITCHXY) {
+ data->max_x = range_y;
+ data->max_y = range_x;
+ } else {
+ data->max_x = range_x;
+ data->max_y = range_y;
+ }
+
+ /* allocate aux bytes */
+ aux = 6;
+
+ if (tchaux & MXT_T100_TCHAUX_VECT)
+ data->t100_aux_vect = aux++;
+
+ if (tchaux & MXT_T100_TCHAUX_AMPL)
+ data->t100_aux_ampl = aux++;
+
+ if (tchaux & MXT_T100_TCHAUX_AREA)
+ data->t100_aux_area = aux++;
+
+ dev_dbg(&client->dev,
+ "T100 aux mappings vect:%u ampl:%u area:%u\n",
+ data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
+
+ dev_info(&client->dev,
+ "T100 Touchscreen size X%uY%u\n", data->max_x, data->max_y);
+
+ return 0;
+}
+
+static int mxt_input_open(struct input_dev *dev);
+static void mxt_input_close(struct input_dev *dev);
+
+static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
+ struct mxt_data *data)
+{
+ const struct mxt_platform_data *pdata = data->pdata;
+ int i;
+
+ input_dev->name = "Atmel maXTouch Touchpad";
+
+ __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
+
+ input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
+ input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
+ input_abs_set_res(input_dev, ABS_MT_POSITION_X,
+ MXT_PIXELS_PER_MM);
+ input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
+ MXT_PIXELS_PER_MM);
+
+ for (i = 0; i < pdata->t19_num_keys; i++)
+ if (pdata->t19_keymap[i] != KEY_RESERVED)
+ input_set_capability(input_dev, EV_KEY,
+ pdata->t19_keymap[i]);
+}
+
+static int mxt_initialize_input_device(struct mxt_data *data)
+{
+ const struct mxt_platform_data *pdata = data->pdata;
+ struct device *dev = &data->client->dev;
+ struct input_dev *input_dev;
+ int error;
+ unsigned int num_mt_slots;
+ unsigned int mt_flags = 0;
+
+ switch (data->multitouch) {
+ case MXT_TOUCH_MULTI_T9:
+ num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
+ error = mxt_read_t9_resolution(data);
+ if (error)
+ dev_warn(dev, "Failed to initialize T9 resolution\n");
+ break;
+
+ case MXT_TOUCH_MULTITOUCHSCREEN_T100:
+ num_mt_slots = data->num_touchids;
+ error = mxt_read_t100_config(data);
+ if (error)
+ dev_warn(dev, "Failed to read T100 config\n");
+ break;
+
+ default:
+ dev_err(dev, "Invalid multitouch object\n");
+ return -EINVAL;
+ }
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ dev_err(dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ input_dev->name = "Atmel maXTouch Touchscreen";
+ input_dev->phys = data->phys;
+ input_dev->id.bustype = BUS_I2C;
+ input_dev->dev.parent = dev;
+ input_dev->open = mxt_input_open;
+ input_dev->close = mxt_input_close;
+
+ input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
+
+ /* For single touch */
+ input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
+
+ if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
+ (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_ampl)) {
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
+ }
+
+ /* If device has buttons we assume it is a touchpad */
+ if (pdata->t19_num_keys) {
+ mxt_set_up_as_touchpad(input_dev, data);
+ mt_flags |= INPUT_MT_POINTER;
+ }
+
+ /* For multi touch */
+ error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
+ if (error) {
+ dev_err(dev, "Error %d initialising slots\n", error);
+ goto err_free_mem;
+ }
+
+ if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
+ input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
+ 0, MT_TOOL_MAX, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_DISTANCE,
+ MXT_DISTANCE_ACTIVE_TOUCH,
+ MXT_DISTANCE_HOVERING,
+ 0, 0);
+ }
+
+ input_set_abs_params(input_dev, ABS_MT_POSITION_X,
+ 0, data->max_x, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
+ 0, data->max_y, 0, 0);
+
+ if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
+ (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_area)) {
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+ 0, MXT_MAX_AREA, 0, 0);
+ }
+
+ if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
+ (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_ampl)) {
+ input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+ 0, 255, 0, 0);
+ }
+
+ if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_vect) {
+ input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
+ 0, 255, 0, 0);
+ }
+
+ if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_ampl) {
+ input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+ 0, 255, 0, 0);
+ }
+
+ if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_vect) {
+ input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
+ 0, 255, 0, 0);
+ }
+
+ input_set_drvdata(input_dev, data);
+
+ error = input_register_device(input_dev);
+ if (error) {
+ dev_err(dev, "Error %d registering input device\n", error);
+ goto err_free_mem;
+ }
+
+ data->input_dev = input_dev;
+
+ return 0;
+
+err_free_mem:
+ input_free_device(input_dev);
+ return error;
+}
+
+static int mxt_configure_objects(struct mxt_data *data,
+ const struct firmware *cfg);
+
+static void mxt_config_cb(const struct firmware *cfg, void *ctx)
+{
+ mxt_configure_objects(ctx, cfg);
+ release_firmware(cfg);
+}
+
+static int mxt_initialize(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ int recovery_attempts = 0;
+ int error;
+
+ while (1) {
+ error = mxt_get_info(data);
+ if (!error)
+ break;
+
+ /* Check bootloader state */
+ error = mxt_probe_bootloader(data, false);
+ if (error) {
+ dev_info(&client->dev, "Trying alternate bootloader address\n");
+ error = mxt_probe_bootloader(data, true);
+ if (error) {
+ /* Chip is not in appmode or bootloader mode */
+ return error;
+ }
+ }
+
+ /* OK, we are in bootloader, see if we can recover */
+ if (++recovery_attempts > 1) {
+ dev_err(&client->dev, "Could not recover from bootloader mode\n");
+ /*
+ * We can reflash from this state, so do not
+ * abort initialization.
+ */
+ data->in_bootloader = true;
+ return 0;
+ }
+
+ /* Attempt to exit bootloader into app mode */
+ mxt_send_bootloader_cmd(data, false);
+ msleep(MXT_FW_RESET_TIME);
+ }
+
+ /* Get object table information */
+ error = mxt_get_object_table(data);
+ if (error) {
+ dev_err(&client->dev, "Error %d reading object table\n", error);
+ return error;
+ }
+
+ error = mxt_acquire_irq(data);
+ if (error)
+ goto err_free_object_table;
+
+ error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
+ &client->dev, GFP_KERNEL, data,
+ mxt_config_cb);
+ if (error) {
+ dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
+ error);
+ goto err_free_object_table;
+ }
+
+ return 0;
+
+err_free_object_table:
+ mxt_free_object_table(data);
+ return error;
+}
+
+static int mxt_configure_objects(struct mxt_data *data,
+ const struct firmware *cfg)
+{
+ struct device *dev = &data->client->dev;
+ struct mxt_info *info = &data->info;
+ int error;
+
+ if (cfg) {
+ error = mxt_update_cfg(data, cfg);
+ if (error)
+ dev_warn(dev, "Error %d updating config\n", error);
+ }
+
+ if (data->multitouch) {
+ error = mxt_initialize_input_device(data);
+ if (error)
+ return error;
+ } else {
+ dev_warn(dev, "No touch object detected\n");
+ }
+
+ dev_info(dev,
+ "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
+ info->family_id, info->variant_id, info->version >> 4,
+ info->version & 0xf, info->build, info->object_num);
+
+ return 0;
+}
+
+/* Firmware Version is returned as Major.Minor.Build */
+static ssize_t mxt_fw_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+ struct mxt_info *info = &data->info;
+ return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
+ info->version >> 4, info->version & 0xf, info->build);
+}
+
+/* Hardware Version is returned as FamilyID.VariantID */
+static ssize_t mxt_hw_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+ struct mxt_info *info = &data->info;
+ return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
+ info->family_id, info->variant_id);
+}
+
+static ssize_t mxt_show_instance(char *buf, int count,
+ struct mxt_object *object, int instance,
+ const u8 *val)
+{
+ int i;
+
+ if (mxt_obj_instances(object) > 1)
+ count += scnprintf(buf + count, PAGE_SIZE - count,
+ "Instance %u\n", instance);
+
+ for (i = 0; i < mxt_obj_size(object); i++)
+ count += scnprintf(buf + count, PAGE_SIZE - count,
+ "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
+ count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
+
+ return count;
+}
+
+static ssize_t mxt_object_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+ struct mxt_object *object;
+ int count = 0;
+ int i, j;
+ int error;
+ u8 *obuf;
+
+ /* Pre-allocate buffer large enough to hold max sized object. */
+ obuf = kmalloc(256, GFP_KERNEL);
+ if (!obuf)
+ return -ENOMEM;
+
+ error = 0;
+ for (i = 0; i < data->info.object_num; i++) {
+ object = data->object_table + i;
+
+ if (!mxt_object_readable(object->type))
+ continue;
+
+ count += scnprintf(buf + count, PAGE_SIZE - count,
+ "T%u:\n", object->type);
+
+ for (j = 0; j < mxt_obj_instances(object); j++) {
+ u16 size = mxt_obj_size(object);
+ u16 addr = object->start_address + j * size;
+
+ error = __mxt_read_reg(data->client, addr, size, obuf);
+ if (error)
+ goto done;
+
+ count = mxt_show_instance(buf, count, object, j, obuf);
+ }
+ }
+
+done:
+ kfree(obuf);
+ return error ?: count;
+}
+
+static int mxt_check_firmware_format(struct device *dev,
+ const struct firmware *fw)
+{
+ unsigned int pos = 0;
+ char c;
+
+ while (pos < fw->size) {
+ c = *(fw->data + pos);
+
+ if (c < '0' || (c > '9' && c < 'A') || c > 'F')
+ return 0;
+
+ pos++;
+ }
+
+ /*
+ * To convert file try:
+ * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
+ */
+ dev_err(dev, "Aborting: firmware file must be in binary format\n");
+
+ return -EINVAL;
+}
+
+static int mxt_load_fw(struct device *dev, const char *fn)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+ const struct firmware *fw = NULL;
+ unsigned int frame_size;
+ unsigned int pos = 0;
+ unsigned int retry = 0;
+ unsigned int frame = 0;
+ int ret;
+
+ ret = request_firmware(&fw, fn, dev);
+ if (ret) {
+ dev_err(dev, "Unable to open firmware %s\n", fn);
+ return ret;
+ }
+
+ /* Check for incorrect enc file */
+ ret = mxt_check_firmware_format(dev, fw);
+ if (ret)
+ goto release_firmware;
+
+ if (!data->in_bootloader) {
+ /* Change to the bootloader mode */
+ data->in_bootloader = true;
+
+ ret = mxt_t6_command(data, MXT_COMMAND_RESET,
+ MXT_BOOT_VALUE, false);
+ if (ret)
+ goto release_firmware;
+
+ msleep(MXT_RESET_TIME);
+
+ /* Do not need to scan since we know family ID */
+ ret = mxt_lookup_bootloader_address(data, 0);
+ if (ret)
+ goto release_firmware;
+
+ mxt_free_input_device(data);
+ mxt_free_object_table(data);
+ } else {
+ enable_irq(data->irq);
+ }
+
+ reinit_completion(&data->bl_completion);
+
+ ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
+ if (ret) {
+ /* Bootloader may still be unlocked from previous attempt */
+ ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
+ if (ret)
+ goto disable_irq;
+ } else {
+ dev_info(dev, "Unlocking bootloader\n");
+
+ /* Unlock bootloader */
+ ret = mxt_send_bootloader_cmd(data, true);
+ if (ret)
+ goto disable_irq;
+ }
+
+ while (pos < fw->size) {
+ ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
+ if (ret)
+ goto disable_irq;
+
+ frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
+
+ /* Take account of CRC bytes */
+ frame_size += 2;
+
+ /* Write one frame to device */
+ ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
+ if (ret)
+ goto disable_irq;
+
+ ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
+ if (ret) {
+ retry++;
+
+ /* Back off by 20ms per retry */
+ msleep(retry * 20);
+
+ if (retry > 20) {
+ dev_err(dev, "Retry count exceeded\n");
+ goto disable_irq;
+ }
+ } else {
+ retry = 0;
+ pos += frame_size;
+ frame++;
+ }
+
+ if (frame % 50 == 0)
+ dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
+ frame, pos, fw->size);
+ }
+
+ /* Wait for flash. */
+ ret = mxt_wait_for_completion(data, &data->bl_completion,
+ MXT_FW_RESET_TIME);
+ if (ret)
+ goto disable_irq;
+
+ dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
+
+ /*
+ * Wait for device to reset. Some bootloader versions do not assert
+ * the CHG line after bootloading has finished, so ignore potential
+ * errors.
+ */
+ mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
+
+ data->in_bootloader = false;
+
+disable_irq:
+ disable_irq(data->irq);
+release_firmware:
+ release_firmware(fw);
+ return ret;
+}
+
+static ssize_t mxt_update_fw_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+ int error;
+
+ error = mxt_load_fw(dev, MXT_FW_NAME);
+ if (error) {
+ dev_err(dev, "The firmware update failed(%d)\n", error);
+ count = error;
+ } else {
+ dev_info(dev, "The firmware update succeeded\n");
+
+ error = mxt_initialize(data);
+ if (error)
+ return error;
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
+static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
+static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
+static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
+
+static struct attribute *mxt_attrs[] = {
+ &dev_attr_fw_version.attr,
+ &dev_attr_hw_version.attr,
+ &dev_attr_object.attr,
+ &dev_attr_update_fw.attr,
+ NULL
+};
+
+static const struct attribute_group mxt_attr_group = {
+ .attrs = mxt_attrs,
+};
+
+static void mxt_start(struct mxt_data *data)
+{
+ /* Touch enable */
+ mxt_write_object(data, data->multitouch, MXT_TOUCH_CTRL, 0x83);
+}
+
+static void mxt_stop(struct mxt_data *data)
+{
+ /* Touch disable */
+ mxt_write_object(data, data->multitouch, MXT_TOUCH_CTRL, 0);
+}
+
+static int mxt_input_open(struct input_dev *dev)
+{
+ struct mxt_data *data = input_get_drvdata(dev);
+
+ mxt_start(data);
+
+ return 0;
+}
+
+static void mxt_input_close(struct input_dev *dev)
+{
+ struct mxt_data *data = input_get_drvdata(dev);
+
+ mxt_stop(data);
+}
+
+#ifdef CONFIG_OF
+static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
+{
+ struct mxt_platform_data *pdata;
+ u32 *keymap;
+ u32 keycode;
+ int proplen, i, ret;
+
+ if (!client->dev.of_node)
+ return ERR_PTR(-ENOENT);
+
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ if (of_find_property(client->dev.of_node, "linux,gpio-keymap",
+ &proplen)) {
+ pdata->t19_num_keys = proplen / sizeof(u32);
+
+ keymap = devm_kzalloc(&client->dev,
+ pdata->t19_num_keys * sizeof(keymap[0]),
+ GFP_KERNEL);
+ if (!keymap)
+ return ERR_PTR(-ENOMEM);
+
+ for (i = 0; i < pdata->t19_num_keys; i++) {
+ ret = of_property_read_u32_index(client->dev.of_node,
+ "linux,gpio-keymap", i, &keycode);
+ if (ret)
+ keycode = KEY_RESERVED;
+
+ keymap[i] = keycode;
+ }
+
+ pdata->t19_keymap = keymap;
+ }
+
+ return pdata;
+}
+#else
+static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
+{
+ return ERR_PTR(-ENOENT);
+}
+#endif
+
+#ifdef CONFIG_ACPI
+
+struct mxt_acpi_platform_data {
+ const char *hid;
+ struct mxt_platform_data pdata;
+};
+
+static unsigned int samus_touchpad_buttons[] = {
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ BTN_LEFT
+};
+
+static struct mxt_acpi_platform_data samus_platform_data[] = {
+ {
+ /* Touchpad */
+ .hid = "ATML0000",
+ .pdata = {
+ .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
+ .t19_keymap = samus_touchpad_buttons,
+ },
+ },
+ {
+ /* Touchscreen */
+ .hid = "ATML0001",
+ },
+ { }
+};
+
+static const struct dmi_system_id mxt_dmi_table[] = {
+ {
+ /* 2015 Google Pixel */
+ .ident = "Chromebook Pixel 2",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
+ },
+ .driver_data = samus_platform_data,
+ },
+ { }
+};
+
+static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
+{
+ struct acpi_device *adev;
+ const struct dmi_system_id *system_id;
+ const struct mxt_acpi_platform_data *acpi_pdata;
+
+ /*
+ * Ignore ACPI devices representing bootloader mode.
+ *
+ * This is a bit of a hack: Google Chromebook BIOS creates ACPI
+ * devices for both application and bootloader modes, but we are
+ * interested in application mode only (if device is in bootloader
+ * mode we'll end up switching into application anyway). So far
+ * application mode addresses were all above 0x40, so we'll use it
+ * as a threshold.
+ */
+ if (client->addr < 0x40)
+ return ERR_PTR(-ENXIO);
+
+ adev = ACPI_COMPANION(&client->dev);
+ if (!adev)
+ return ERR_PTR(-ENOENT);
+
+ system_id = dmi_first_match(mxt_dmi_table);
+ if (!system_id)
+ return ERR_PTR(-ENOENT);
+
+ acpi_pdata = system_id->driver_data;
+ if (!acpi_pdata)
+ return ERR_PTR(-ENOENT);
+
+ while (acpi_pdata->hid) {
+ if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
+ return &acpi_pdata->pdata;
+
+ acpi_pdata++;
+ }
+
+ return ERR_PTR(-ENOENT);
+}
+#else
+static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
+{
+ return ERR_PTR(-ENOENT);
+}
+#endif
+
+static const struct mxt_platform_data *
+mxt_get_platform_data(struct i2c_client *client)
+{
+ const struct mxt_platform_data *pdata;
+
+ pdata = dev_get_platdata(&client->dev);
+ if (pdata)
+ return pdata;
+
+ pdata = mxt_parse_dt(client);
+ if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
+ return pdata;
+
+ pdata = mxt_parse_acpi(client);
+ if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
+ return pdata;
+
+ dev_err(&client->dev, "No platform data specified\n");
+ return ERR_PTR(-EINVAL);
+}
+
+static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct mxt_data *data;
+ const struct mxt_platform_data *pdata;
+ int error;
+
+ pdata = mxt_get_platform_data(client);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+
+ data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
+ if (!data) {
+ dev_err(&client->dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
+ client->adapter->nr, client->addr);
+
+ data->client = client;
+ data->pdata = pdata;
+ data->irq = client->irq;
+ i2c_set_clientdata(client, data);
+
+ init_completion(&data->bl_completion);
+ init_completion(&data->reset_completion);
+ init_completion(&data->crc_completion);
+
+ error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
+ pdata->irqflags | IRQF_ONESHOT,
+ client->name, data);
+ if (error) {
+ dev_err(&client->dev, "Failed to register interrupt\n");
+ goto err_free_mem;
+ }
+
+ disable_irq(client->irq);
+
+ error = mxt_initialize(data);
+ if (error)
+ goto err_free_irq;
+
+ error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
+ if (error) {
+ dev_err(&client->dev, "Failure %d creating sysfs group\n",
+ error);
+ goto err_free_object;
+ }
+
+ return 0;
+
+err_free_object:
+ mxt_free_input_device(data);
+ mxt_free_object_table(data);
+err_free_irq:
+ free_irq(client->irq, data);
+err_free_mem:
+ kfree(data);
+ return error;
+}
+
+static int mxt_remove(struct i2c_client *client)
+{
+ struct mxt_data *data = i2c_get_clientdata(client);
+
+ sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
+ free_irq(data->irq, data);
+ mxt_free_input_device(data);
+ mxt_free_object_table(data);
+ kfree(data);
+
+ return 0;
+}
+
+static int __maybe_unused mxt_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mxt_data *data = i2c_get_clientdata(client);
+ struct input_dev *input_dev = data->input_dev;
+
+ mutex_lock(&input_dev->mutex);
+
+ if (input_dev->users)
+ mxt_stop(data);
+
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+
+static int __maybe_unused mxt_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mxt_data *data = i2c_get_clientdata(client);
+ struct input_dev *input_dev = data->input_dev;
+
+ mxt_soft_reset(data);
+
+ mutex_lock(&input_dev->mutex);
+
+ if (input_dev->users)
+ mxt_start(data);
+
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
+
+static const struct of_device_id mxt_of_match[] = {
+ { .compatible = "atmel,maxtouch", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mxt_of_match);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id mxt_acpi_id[] = {
+ { "ATML0000", 0 }, /* Touchpad */
+ { "ATML0001", 0 }, /* Touchscreen */
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
+#endif
+
+static const struct i2c_device_id mxt_id[] = {
+ { "qt602240_ts", 0 },
+ { "atmel_mxt_ts", 0 },
+ { "atmel_mxt_tp", 0 },
+ { "mXT224", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mxt_id);
+
+static struct i2c_driver mxt_driver = {
+ .driver = {
+ .name = "atmel_mxt_ts",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mxt_of_match),
+ .acpi_match_table = ACPI_PTR(mxt_acpi_id),
+ .pm = &mxt_pm_ops,
+ },
+ .probe = mxt_probe,
+ .remove = mxt_remove,
+ .id_table = mxt_id,
+};
+
+module_i2c_driver(mxt_driver);
+
+/* Module information */
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff