* 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
*/
#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>
/* Version */
#define MXT_VER_21 21
#define MXT_VER_22 22
-/* Slave addresses */
-#define MXT_APP_LOW 0x4a
-#define MXT_APP_HIGH 0x4b
-#define MXT_BOOT_LOW 0x24
-#define MXT_BOOT_HIGH 0x25
-
-/* Firmware */
+/* 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_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_SPT_MESSAGECOUNT_T44 44
#define MXT_SPT_CTECONFIG_T46 46
+/* 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_REPORTALL 3
#define MXT_COMMAND_DIAGNOSTIC 5
+/* Define for T6 status byte */
+#define MXT_T6_STATUS_RESET (1 << 7)
+
/* MXT_GEN_POWER_T7 field */
#define MXT_POWER_IDLEACQINT 0
#define MXT_POWER_ACTVACQINT 1
/* MXT_TOUCH_MULTI_T9 field */
#define MXT_TOUCH_CTRL 0
-#define MXT_TOUCH_XORIGIN 1
-#define MXT_TOUCH_YORIGIN 2
-#define MXT_TOUCH_XSIZE 3
-#define MXT_TOUCH_YSIZE 4
-#define MXT_TOUCH_BLEN 6
-#define MXT_TOUCH_TCHTHR 7
-#define MXT_TOUCH_TCHDI 8
-#define MXT_TOUCH_ORIENT 9
-#define MXT_TOUCH_MOVHYSTI 11
-#define MXT_TOUCH_MOVHYSTN 12
-#define MXT_TOUCH_NUMTOUCH 14
-#define MXT_TOUCH_MRGHYST 15
-#define MXT_TOUCH_MRGTHR 16
-#define MXT_TOUCH_AMPHYST 17
-#define MXT_TOUCH_XRANGE_LSB 18
-#define MXT_TOUCH_XRANGE_MSB 19
-#define MXT_TOUCH_YRANGE_LSB 20
-#define MXT_TOUCH_YRANGE_MSB 21
-#define MXT_TOUCH_XLOCLIP 22
-#define MXT_TOUCH_XHICLIP 23
-#define MXT_TOUCH_YLOCLIP 24
-#define MXT_TOUCH_YHICLIP 25
-#define MXT_TOUCH_XEDGECTRL 26
-#define MXT_TOUCH_XEDGEDIST 27
-#define MXT_TOUCH_YEDGECTRL 28
-#define MXT_TOUCH_YEDGEDIST 29
-#define MXT_TOUCH_JUMPLIMIT 30
+#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 for MXT_GEN_COMMAND_T6 */
#define MXT_BOOT_VALUE 0xa5
+#define MXT_RESET_VALUE 0x01
#define MXT_BACKUP_VALUE 0x55
+
+/* Delay times */
#define MXT_BACKUP_TIME 50 /* msec */
#define MXT_RESET_TIME 200 /* msec */
-
-#define MXT_FWRESET_TIME 175 /* msec */
-
-/* MXT_SPT_GPIOPWM_T19 field */
-#define MXT_GPIO0_MASK 0x04
-#define MXT_GPIO1_MASK 0x08
-#define MXT_GPIO2_MASK 0x10
-#define MXT_GPIO3_MASK 0x20
+#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_FRAME_CRC_PASS 0x04
#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
#define MXT_BOOT_STATUS_MASK 0x3f
-
-/* Touch status */
-#define MXT_UNGRIP (1 << 0)
-#define MXT_SUPPRESS (1 << 1)
-#define MXT_AMP (1 << 2)
-#define MXT_VECTOR (1 << 3)
-#define MXT_MOVE (1 << 4)
-#define MXT_RELEASE (1 << 5)
-#define MXT_PRESS (1 << 6)
-#define MXT_DETECT (1 << 7)
-
-/* Touch orient bits */
-#define MXT_XY_SWITCH (1 << 0)
-#define MXT_X_INVERT (1 << 1)
-#define MXT_Y_INVERT (1 << 2)
+#define MXT_BOOT_EXTENDED_ID (1 << 5)
+#define MXT_BOOT_ID_MASK 0x1f
/* Touchscreen absolute values */
#define MXT_MAX_AREA 0xff
struct mxt_object {
u8 type;
u16 start_address;
- u8 size; /* Size of each instance - 1 */
- u8 instances; /* Number of instances - 1 */
+ u8 size_minus_one;
+ u8 instances_minus_one;
u8 num_report_ids;
} __packed;
-struct mxt_message {
- u8 reportid;
- u8 message[7];
-};
-
/* Each client has this additional data */
struct mxt_data {
struct i2c_client *client;
const struct mxt_platform_data *pdata;
struct mxt_object *object_table;
struct mxt_info info;
- bool is_tp;
-
unsigned int irq;
unsigned int max_x;
unsigned int max_y;
+ bool in_bootloader;
+ u16 mem_size;
+ u32 config_crc;
+ u32 info_crc;
+ u8 bootloader_addr;
+ u8 *msg_buf;
/* Cached parameters from object table */
+ u8 T5_msg_size;
u8 T6_reportid;
+ u16 T6_address;
+ u16 T7_address;
u8 T9_reportid_min;
u8 T9_reportid_max;
u8 T19_reportid;
+
+ /* 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) {
}
}
-static bool mxt_object_writable(unsigned int type)
+static void mxt_dump_message(struct mxt_data *data, u8 *message)
{
- switch (type) {
- case MXT_GEN_COMMAND_T6:
- case MXT_GEN_POWER_T7:
- case MXT_GEN_ACQUIRE_T8:
- 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_DIGITIZER_T43:
- case MXT_SPT_CTECONFIG_T46:
- return true;
+ 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:
- return false;
+ 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 retry)
+{
+ struct device *dev = &data->client->dev;
+ int ret;
+ u8 val;
+ bool crc_failure;
+
+ ret = mxt_lookup_bootloader_address(data, retry);
+ if (ret)
+ return ret;
+
+ ret = mxt_bootloader_read(data, &val, 1);
+ if (ret)
+ return ret;
+
+ /* 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 void mxt_dump_message(struct device *dev,
- struct mxt_message *message)
+static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
{
- dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
- message->reportid, 7, message->message);
+ 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 i2c_client *client,
- unsigned int state)
+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 (i2c_master_recv(client, &val, 1) != 1) {
- dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
- return -EIO;
+ 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)
+ 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(&client->dev, "Unvalid bootloader mode state\n");
+ dev_err(dev, "Invalid bootloader state %02X != %02X\n",
+ val, state);
return -EINVAL;
}
return 0;
}
-static int mxt_unlock_bootloader(struct i2c_client *client)
+static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
{
+ int ret;
u8 buf[2];
- buf[0] = MXT_UNLOCK_CMD_LSB;
- buf[1] = MXT_UNLOCK_CMD_MSB;
-
- if (i2c_master_send(client, buf, 2) != 2) {
- dev_err(&client->dev, "%s: i2c send failed\n", __func__);
- return -EIO;
+ if (unlock) {
+ buf[0] = MXT_UNLOCK_CMD_LSB;
+ buf[1] = MXT_UNLOCK_CMD_MSB;
+ } else {
+ buf[0] = 0x01;
+ buf[1] = 0x01;
}
- return 0;
-}
-
-static int mxt_fw_write(struct i2c_client *client,
- const u8 *data, unsigned int frame_size)
-{
- if (i2c_master_send(client, data, frame_size) != frame_size) {
- dev_err(&client->dev, "%s: i2c send failed\n", __func__);
- return -EIO;
- }
+ ret = mxt_bootloader_write(data, buf, 2);
+ if (ret)
+ return ret;
return 0;
}
return ret;
}
-static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
-{
- return __mxt_read_reg(client, reg, 1, val);
-}
-
static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
const void *val)
{
return object;
}
- dev_err(&data->client->dev, "Invalid object type\n");
+ dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
return NULL;
}
-static int mxt_read_message(struct mxt_data *data,
- struct mxt_message *message)
+static int mxt_read_message(struct mxt_data *data, u8 *message)
{
struct mxt_object *object;
u16 reg;
reg = object->start_address;
return __mxt_read_reg(data->client, reg,
- sizeof(struct mxt_message), message);
+ data->T5_msg_size, message);
}
static int mxt_write_object(struct mxt_data *data,
u16 reg;
object = mxt_get_object(data, type);
- if (!object || offset >= object->size + 1)
+ 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, struct mxt_message *message)
+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 < MXT_NUM_GPIO; i++) {
- if (data->pdata->key_map[i] == KEY_RESERVED)
+ for (i = 0; i < pdata->t19_num_keys; i++) {
+ if (pdata->t19_keymap[i] == KEY_RESERVED)
continue;
- button = !(message->message[0] & MXT_GPIO0_MASK << i);
- input_report_key(input, data->pdata->key_map[i], button);
+ button = !(message[1] & (1 << i));
+ input_report_key(input, pdata->t19_keymap[i], button);
}
}
-static void mxt_input_touchevent(struct mxt_data *data,
- struct mxt_message *message, int id)
+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_input_touchevent(struct mxt_data *data, u8 *message)
{
struct device *dev = &data->client->dev;
- u8 status = message->message[0];
struct input_dev *input_dev = data->input_dev;
+ int id;
+ u8 status;
int x;
int y;
int area;
- int pressure;
+ 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));
- x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
- y = (message->message[2] << 4) | ((message->message[3] & 0xf));
+ /* Handle 10/12 bit switching */
if (data->max_x < 1024)
- x = x >> 2;
+ x >>= 2;
if (data->max_y < 1024)
- y = y >> 2;
+ y >>= 2;
- area = message->message[4];
- pressure = message->message[5];
+ 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_DETECT) ? 'D' : '.',
- (status & MXT_PRESS) ? 'P' : '.',
- (status & MXT_RELEASE) ? 'R' : '.',
- (status & MXT_MOVE) ? 'M' : '.',
- (status & MXT_VECTOR) ? 'V' : '.',
- (status & MXT_AMP) ? 'A' : '.',
- (status & MXT_SUPPRESS) ? 'S' : '.',
- (status & MXT_UNGRIP) ? 'U' : '.',
- x, y, area, pressure);
+ (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);
- input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
- status & MXT_DETECT);
- if (status & MXT_DETECT) {
+ 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, pressure);
+ 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);
}
}
-static unsigned mxt_extract_T6_csum(const u8 *csum)
+static u16 mxt_extract_T6_csum(const u8 *csum)
{
return csum[0] | (csum[1] << 8) | (csum[2] << 16);
}
-static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
+static bool mxt_is_T9_message(struct mxt_data *data, u8 *msg)
{
- u8 id = msg->reportid;
+ u8 id = msg[0];
return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
}
-static irqreturn_t mxt_interrupt(int irq, void *dev_id)
+static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
{
- struct mxt_data *data = dev_id;
- struct mxt_message message;
- const u8 *payload = &message.message[0];
+ u8 *message = &data->msg_buf[0];
+ const u8 *payload = &data->msg_buf[1];
struct device *dev = &data->client->dev;
u8 reportid;
bool update_input = false;
+ u32 crc;
do {
- if (mxt_read_message(data, &message)) {
+ if (mxt_read_message(data, message)) {
dev_err(dev, "Failed to read message\n");
- goto end;
+ return IRQ_NONE;
}
- reportid = message.reportid;
+ reportid = message[0];
if (reportid == data->T6_reportid) {
u8 status = payload[0];
- unsigned csum = mxt_extract_T6_csum(&payload[1]);
+
+ crc = mxt_extract_T6_csum(&payload[1]);
+ if (crc != data->config_crc) {
+ data->config_crc = crc;
+ complete(&data->crc_completion);
+ }
+
dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
- status, csum);
- } else if (mxt_is_T9_message(data, &message)) {
- int id = reportid - data->T9_reportid_min;
- mxt_input_touchevent(data, &message, id);
+ status, data->config_crc);
+
+ if (status & MXT_T6_STATUS_RESET)
+ complete(&data->reset_completion);
+ } else if (!data->input_dev) {
+ /*
+ * do not report events if input device
+ * is not yet registered
+ */
+ mxt_dump_message(data, message);
+ } else if (mxt_is_T9_message(data, message)) {
+ mxt_input_touchevent(data, message);
update_input = true;
- } else if (message.reportid == data->T19_reportid) {
- mxt_input_button(data, &message);
+ } else if (reportid == data->T19_reportid) {
+ mxt_input_button(data, message);
update_input = true;
} else {
- mxt_dump_message(dev, &message);
+ mxt_dump_message(data, message);
}
- } while (reportid != 0xff);
+ } while (reportid != MXT_RPTID_NOMSG);
- if (update_input) {
- input_mt_report_pointer_emulation(data->input_dev, false);
- input_sync(data->input_dev);
- }
+ if (update_input)
+ mxt_input_sync(data);
-end:
return IRQ_HANDLED;
}
-static int mxt_check_reg_init(struct mxt_data *data)
+static irqreturn_t mxt_interrupt(int irq, void *dev_id)
{
- const struct mxt_platform_data *pdata = data->pdata;
- struct mxt_object *object;
- struct device *dev = &data->client->dev;
- int index = 0;
- int i, size;
- int ret;
+ struct mxt_data *data = dev_id;
- if (!pdata->config) {
- dev_dbg(dev, "No cfg data defined, skipping reg init\n");
- return 0;
+ if (data->in_bootloader) {
+ /* bootloader state transition completion */
+ complete(&data->bl_completion);
+ return IRQ_HANDLED;
}
- for (i = 0; i < data->info.object_num; i++) {
- object = data->object_table + i;
+ if (!data->object_table)
+ return IRQ_HANDLED;
- if (!mxt_object_writable(object->type))
- continue;
+ return mxt_process_messages_until_invalid(data);
+}
- size = (object->size + 1) * (object->instances + 1);
- if (index + size > pdata->config_length) {
- dev_err(dev, "Not enough config data!\n");
- return -EINVAL;
- }
+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;
- ret = __mxt_write_reg(data->client, object->start_address,
- size, &pdata->config[index]);
+ do {
+ msleep(20);
+ ret = __mxt_read_reg(data->client, reg, 1, &command_register);
if (ret)
return ret;
- index += size;
+ } 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_make_highchg(struct mxt_data *data)
+static int mxt_soft_reset(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
- struct mxt_message message;
- int count = 10;
- int error;
+ int ret = 0;
- /* Read dummy message to make high CHG pin */
- do {
- error = mxt_read_message(data, &message);
- if (error)
- return error;
- } while (message.reportid != 0xff && --count);
+ dev_info(dev, "Resetting chip\n");
- if (!count) {
- dev_err(dev, "CHG pin isn't cleared\n");
- return -EBUSY;
- }
+ 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_handle_pdata(struct mxt_data *data)
+static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
{
- const struct mxt_platform_data *pdata = data->pdata;
- u8 voltage;
-
- /* Set touchscreen lines */
- mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
- pdata->x_line);
- mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
- pdata->y_line);
-
- /* Set touchscreen orient */
- mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
- pdata->orient);
-
- /* Set touchscreen burst length */
- mxt_write_object(data, MXT_TOUCH_MULTI_T9,
- MXT_TOUCH_BLEN, pdata->blen);
-
- /* Set touchscreen threshold */
- mxt_write_object(data, MXT_TOUCH_MULTI_T9,
- MXT_TOUCH_TCHTHR, pdata->threshold);
-
- /* Set touchscreen resolution */
- mxt_write_object(data, MXT_TOUCH_MULTI_T9,
- MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
- mxt_write_object(data, MXT_TOUCH_MULTI_T9,
- MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
- mxt_write_object(data, MXT_TOUCH_MULTI_T9,
- MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
- mxt_write_object(data, MXT_TOUCH_MULTI_T9,
- MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
-
- /* Set touchscreen voltage */
- if (pdata->voltage) {
- if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
- voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
- MXT_VOLTAGE_STEP;
- voltage = 0xff - voltage + 1;
- } else
- voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
- MXT_VOLTAGE_STEP;
-
- mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
- MXT_CTE_VOLTAGE, voltage);
- }
+ /*
+ * 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 int mxt_get_info(struct mxt_data *data)
+static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
{
- struct i2c_client *client = data->client;
- struct mxt_info *info = &data->info;
- int error;
+ static const unsigned int crcpoly = 0x80001B;
+ u32 result;
+ u32 data_word;
- /* Read 7-byte info block starting at address 0 */
- error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
- if (error)
- return error;
+ data_word = (secondbyte << 8) | firstbyte;
+ result = ((*crc << 1) ^ data_word);
- return 0;
+ if (result & 0x1000000)
+ result ^= crcpoly;
+
+ *crc = result;
}
-static int mxt_get_object_table(struct mxt_data *data)
+static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
{
- struct i2c_client *client = data->client;
- size_t table_size;
- int error;
- int i;
- u8 reportid;
-
- table_size = data->info.object_num * sizeof(struct mxt_object);
- error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
- data->object_table);
- if (error)
- return error;
-
- /* Valid Report IDs start counting from 1 */
- reportid = 1;
- for (i = 0; i < data->info.object_num; i++) {
- struct mxt_object *object = data->object_table + i;
- u8 min_id, max_id;
+ u32 crc = 0;
+ u8 *ptr = base + start_off;
+ u8 *last_val = base + end_off - 1;
- le16_to_cpus(&object->start_address);
+ if (end_off < start_off)
+ return -EINVAL;
- if (object->num_report_ids) {
- min_id = reportid;
- reportid += object->num_report_ids *
- (object->instances + 1);
- max_id = reportid - 1;
- } else {
- min_id = 0;
- max_id = 0;
- }
+ while (ptr < last_val) {
+ mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
+ ptr += 2;
+ }
- dev_dbg(&data->client->dev,
- "Type %2d Start %3d Size %3d Instances %2d ReportIDs %3u : %3u\n",
- object->type, object->start_address, object->size + 1,
- object->instances + 1, min_id, max_id);
+ /* if len is odd, fill the last byte with 0 */
+ if (ptr == last_val)
+ mxt_calc_crc24(&crc, *ptr, 0);
- switch (object->type) {
- case MXT_GEN_COMMAND_T6:
- data->T6_reportid = min_id;
- break;
- case MXT_TOUCH_MULTI_T9:
- data->T9_reportid_min = min_id;
- data->T9_reportid_max = max_id;
- break;
- case MXT_SPT_GPIOPWM_T19:
- data->T19_reportid = min_id;
- break;
- }
- }
+ /* Mask to 24-bit */
+ crc &= 0x00FFFFFF;
- return 0;
+ return crc;
}
-static void mxt_free_object_table(struct mxt_data *data)
-{
- kfree(data->object_table);
- data->object_table = NULL;
- data->T6_reportid = 0;
- data->T9_reportid_min = 0;
- data->T9_reportid_max = 0;
- data->T19_reportid = 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;
+ struct mxt_object *object;
+ int ret;
+ int offset;
+ int data_pos;
+ int byte_offset;
+ int i;
+ int cfg_start_ofs;
+ u32 info_crc, config_crc, calculated_crc;
+ u8 *config_mem;
+ size_t config_mem_size;
+ unsigned int type, instance, size;
+ u8 val;
+ u16 reg;
+
+ 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");
+ ret = -EINVAL;
+ goto release;
+ }
+
+ 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");
+ ret = -EINVAL;
+ goto release;
+ }
+
+ data_pos += offset;
+ }
+
+ if (cfg_info.family_id != data->info.family_id) {
+ dev_err(dev, "Family ID mismatch!\n");
+ ret = -EINVAL;
+ goto release;
+ }
+
+ if (cfg_info.variant_id != data->info.variant_id) {
+ dev_err(dev, "Variant ID mismatch!\n");
+ ret = -EINVAL;
+ goto release;
+ }
+
+ /* 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");
+ ret = -EINVAL;
+ goto release;
+ }
+ 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");
+ ret = -EINVAL;
+ goto release;
+ }
+ 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);
+ ret = 0;
+ goto release;
+ } 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");
+ ret = -ENOMEM;
+ goto release;
+ }
+
+ 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");
+ ret = -EINVAL;
+ goto release_mem;
+ }
+ 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);
+ 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");
+ ret = -EINVAL;
+ goto release_mem;
+ }
+
+ 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\n", type);
+ ret = -EINVAL;
+ goto release_mem;
+ }
+ 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);
+ ret = -EINVAL;
+ 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);
+
+ /* Write configuration as blocks */
+ byte_offset = 0;
+ while (byte_offset < config_mem_size) {
+ size = config_mem_size - byte_offset;
+
+ if (size > MXT_MAX_BLOCK_WRITE)
+ size = MXT_MAX_BLOCK_WRITE;
+
+ ret = __mxt_write_reg(data->client,
+ cfg_start_ofs + byte_offset,
+ size, config_mem + byte_offset);
+ if (ret != 0) {
+ dev_err(dev, "Config write error, ret=%d\n", ret);
+ goto release_mem;
+ }
+
+ byte_offset += size;
+ }
+
+ 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);
+release:
+ release_firmware(cfg);
+ return ret;
}
-static int mxt_initialize(struct mxt_data *data)
+static int mxt_make_highchg(struct mxt_data *data)
+{
+ struct device *dev = &data->client->dev;
+ int count = 10;
+ int error;
+
+ /* Read dummy message to make high CHG pin */
+ do {
+ error = mxt_read_message(data, data->msg_buf);
+ if (error)
+ return error;
+ } while (data->msg_buf[0] != MXT_RPTID_NOMSG && --count);
+
+ if (!count) {
+ dev_err(dev, "CHG pin isn't cleared\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int mxt_acquire_irq(struct mxt_data *data)
+{
+ int error;
+
+ enable_irq(data->irq);
+
+ error = mxt_make_highchg(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;
- u8 val;
- error = mxt_get_info(data);
+ /* Read 7-byte info block starting at address 0 */
+ error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
if (error)
return error;
- data->object_table = kcalloc(info->object_num,
- sizeof(struct mxt_object),
- GFP_KERNEL);
- if (!data->object_table) {
- dev_err(&client->dev, "Failed to allocate memory\n");
+ return 0;
+}
+
+static void mxt_free_object_table(struct mxt_data *data)
+{
+ input_unregister_device(data->input_dev);
+ data->input_dev = NULL;
+
+ kfree(data->object_table);
+ data->object_table = NULL;
+ kfree(data->msg_buf);
+ data->msg_buf = NULL;
+ 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;
+}
+
+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;
}
- /* Get object table information */
- error = mxt_get_object_table(data);
+ 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:
+ /* CRC not enabled, therefore don't read last byte */
+ data->T5_msg_size = mxt_obj_size(object) - 1;
+ 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->T9_reportid_min = min_id;
+ data->T9_reportid_max = max_id;
+ break;
+ case MXT_SPT_GPIOPWM_T19:
+ data->T19_reportid = min_id;
+ 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;
+ }
+
+ data->msg_buf = kzalloc(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)
- goto err_free_object_table;
+ return error;
- /* Check register init values */
- error = mxt_check_reg_init(data);
+ 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)
- goto err_free_object_table;
+ return error;
+
+ /* Handle default values */
+ if (range.x == 0)
+ range.x = 1023;
+
+ if (range.y == 0)
+ range.y = 1023;
- mxt_handle_pdata(data);
+ 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;
+ }
- /* Backup to memory */
- mxt_write_object(data, MXT_GEN_COMMAND_T6,
- MXT_COMMAND_BACKUPNV,
- MXT_BACKUP_VALUE);
- msleep(MXT_BACKUP_TIME);
+ dev_dbg(&client->dev,
+ "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
- /* Soft reset */
- mxt_write_object(data, MXT_GEN_COMMAND_T6,
- MXT_COMMAND_RESET, 1);
- msleep(MXT_RESET_TIME);
+ return 0;
+}
- /* Update matrix size at info struct */
- error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
+static int mxt_input_open(struct input_dev *dev);
+static void mxt_input_close(struct input_dev *dev);
+
+static int mxt_initialize_t9_input_device(struct mxt_data *data)
+{
+ struct device *dev = &data->client->dev;
+ const struct mxt_platform_data *pdata = data->pdata;
+ struct input_dev *input_dev;
+ int error;
+ unsigned int num_mt_slots;
+ unsigned int mt_flags = 0;
+ int i;
+
+ error = mxt_read_t9_resolution(data);
if (error)
- goto err_free_object_table;
- info->matrix_xsize = val;
+ dev_warn(dev, "Failed to initialize T9 resolution\n");
+
+ 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;
+
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+
+ if (pdata->t19_num_keys) {
+ __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
+
+ 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]);
- error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
+ mt_flags |= INPUT_MT_POINTER;
+
+ 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);
+
+ input_dev->name = "Atmel maXTouch Touchpad";
+ }
+
+ /* 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);
+ input_set_abs_params(input_dev, ABS_PRESSURE,
+ 0, 255, 0, 0);
+
+ /* For multi touch */
+ num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
+ 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;
+ }
+
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+ 0, MXT_MAX_AREA, 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);
+ input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+ 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);
+}
+
+static int mxt_initialize(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ int error;
+ bool alt_bootloader_addr = false;
+ bool retry = false;
+
+retry_info:
+ error = mxt_get_info(data);
+ if (error) {
+retry_bootloader:
+ error = mxt_probe_bootloader(data, alt_bootloader_addr);
+ if (error) {
+ if (alt_bootloader_addr) {
+ /* Chip is not in appmode or bootloader mode */
+ return error;
+ }
+
+ dev_info(&client->dev, "Trying alternate bootloader address\n");
+ alt_bootloader_addr = true;
+ goto retry_bootloader;
+ } else {
+ if (retry) {
+ dev_err(&client->dev, "Could not recover from bootloader mode\n");
+ /*
+ * We can reflash from this state, so do not
+ * abort init
+ */
+ data->in_bootloader = true;
+ return 0;
+ }
+
+ /* Attempt to exit bootloader into app mode */
+ mxt_send_bootloader_cmd(data, false);
+ msleep(MXT_FW_RESET_TIME);
+ retry = true;
+ goto retry_info;
+ }
+ }
+
+ /* 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;
+ }
+
+ mxt_acquire_irq(data);
if (error)
goto err_free_object_table;
- info->matrix_ysize = val;
-
- dev_info(&client->dev,
- "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
- info->family_id, info->variant_id, info->version >> 4,
- info->version & 0xf, info->build);
- dev_info(&client->dev,
- "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
- info->matrix_xsize, info->matrix_ysize,
- info->object_num);
+ request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
+ &data->client->dev, GFP_KERNEL, data,
+ mxt_config_cb);
return 0;
return error;
}
-static void mxt_calc_resolution(struct mxt_data *data)
+static int mxt_configure_objects(struct mxt_data *data,
+ const struct firmware *cfg)
{
- unsigned int max_x = data->pdata->x_size - 1;
- unsigned int max_y = data->pdata->y_size - 1;
+ struct device *dev = &data->client->dev;
+ struct mxt_info *info = &data->info;
+ int error;
- if (data->pdata->orient & MXT_XY_SWITCH) {
- data->max_x = max_y;
- data->max_y = max_x;
- } else {
- data->max_x = max_x;
- data->max_y = max_y;
+ if (cfg) {
+ error = mxt_update_cfg(data, cfg);
+ if (error)
+ dev_warn(dev, "Error %d updating config\n", error);
}
+
+ error = mxt_initialize_t9_input_device(data);
+ if (error)
+ return error;
+
+ 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 */
{
int i;
- if (object->instances > 0)
+ if (mxt_obj_instances(object) > 1)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Instance %u\n", instance);
- for (i = 0; i < object->size + 1; i++)
+ 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");
count += scnprintf(buf + count, PAGE_SIZE - count,
"T%u:\n", object->type);
- for (j = 0; j < object->instances + 1; j++) {
- u16 size = object->size + 1;
+ 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);
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);
- struct i2c_client *client = data->client;
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);
return ret;
}
- /* Change to the bootloader mode */
- mxt_write_object(data, MXT_GEN_COMMAND_T6,
- MXT_COMMAND_RESET, MXT_BOOT_VALUE);
- msleep(MXT_RESET_TIME);
+ /* Check for incorrect enc file */
+ ret = mxt_check_firmware_format(dev, fw);
+ if (ret)
+ goto release_firmware;
- /* Change to slave address of bootloader */
- if (client->addr == MXT_APP_LOW)
- client->addr = MXT_BOOT_LOW;
- else
- client->addr = MXT_BOOT_HIGH;
+ if (!data->in_bootloader) {
+ /* Change to the bootloader mode */
+ data->in_bootloader = true;
- ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
- if (ret)
- goto out;
+ 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;
+ } else {
+ enable_irq(data->irq);
+ }
+
+ mxt_free_object_table(data);
+ 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 */
- mxt_unlock_bootloader(client);
+ /* Unlock bootloader */
+ ret = mxt_send_bootloader_cmd(data, true);
+ if (ret)
+ goto disable_irq;
+ }
while (pos < fw->size) {
- ret = mxt_check_bootloader(client,
- MXT_WAITING_FRAME_DATA);
+ ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
if (ret)
- goto out;
+ goto disable_irq;
frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
- /* We should add 2 at frame size as the the firmware data is not
- * included the CRC bytes.
- */
+ /* Take account of CRC bytes */
frame_size += 2;
/* Write one frame to device */
- mxt_fw_write(client, fw->data + pos, frame_size);
-
- ret = mxt_check_bootloader(client,
- MXT_FRAME_CRC_PASS);
+ ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
if (ret)
- goto out;
+ goto disable_irq;
+
+ ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
+ if (ret) {
+ retry++;
- pos += frame_size;
+ /* Back off by 20ms per retry */
+ msleep(retry * 20);
- dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
+ 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);
}
-out:
- release_firmware(fw);
+ /* 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);
- /* Change to slave address of application */
- if (client->addr == MXT_BOOT_LOW)
- client->addr = MXT_APP_LOW;
- else
- client->addr = MXT_APP_HIGH;
+ data->in_bootloader = false;
+disable_irq:
+ disable_irq(data->irq);
+release_firmware:
+ release_firmware(fw);
return ret;
}
struct mxt_data *data = dev_get_drvdata(dev);
int error;
- disable_irq(data->irq);
-
error = mxt_load_fw(dev, MXT_FW_NAME);
if (error) {
dev_err(dev, "The firmware update failed(%d)\n", error);
count = error;
} else {
- dev_dbg(dev, "The firmware update succeeded\n");
+ dev_info(dev, "The firmware update succeeded\n");
- /* Wait for reset */
- msleep(MXT_FWRESET_TIME);
-
- mxt_free_object_table(data);
-
- mxt_initialize(data);
+ error = mxt_initialize(data);
+ if (error)
+ return error;
}
- enable_irq(data->irq);
-
- error = mxt_make_highchg(data);
- if (error)
- return error;
-
return count;
}
mxt_stop(data);
}
-static int mxt_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+#ifdef CONFIG_OF
+static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
{
- const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
- struct mxt_data *data;
- struct input_dev *input_dev;
- int error;
- unsigned int num_mt_slots;
-
- if (!pdata)
- return -EINVAL;
-
- data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
- input_dev = input_allocate_device();
- if (!data || !input_dev) {
- dev_err(&client->dev, "Failed to allocate memory\n");
- error = -ENOMEM;
- goto err_free_mem;
- }
-
- data->is_tp = pdata && pdata->is_tp;
+ struct mxt_platform_data *pdata;
+ u32 *keymap;
+ u32 keycode;
+ int proplen, i, ret;
- input_dev->name = (data->is_tp) ? "Atmel maXTouch Touchpad" :
- "Atmel maXTouch Touchscreen";
- snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
- client->adapter->nr, client->addr);
+ if (!client->dev.of_node)
+ return ERR_PTR(-ENODEV);
- input_dev->phys = data->phys;
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
- input_dev->id.bustype = BUS_I2C;
- input_dev->dev.parent = &client->dev;
- input_dev->open = mxt_input_open;
- input_dev->close = mxt_input_close;
+ if (of_find_property(client->dev.of_node, "linux,gpio-keymap",
+ &proplen)) {
+ pdata->t19_num_keys = proplen / sizeof(u32);
- data->client = client;
- data->input_dev = input_dev;
- data->pdata = pdata;
- data->irq = client->irq;
-
- mxt_calc_resolution(data);
+ keymap = devm_kzalloc(&client->dev,
+ pdata->t19_num_keys * sizeof(keymap[0]),
+ GFP_KERNEL);
+ if (!keymap)
+ return ERR_PTR(-ENOMEM);
- error = mxt_initialize(data);
- if (error)
- goto err_free_mem;
+ 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;
- __set_bit(EV_ABS, input_dev->evbit);
- __set_bit(EV_KEY, input_dev->evbit);
- __set_bit(BTN_TOUCH, input_dev->keybit);
+ keymap[i] = keycode;
+ }
- if (data->is_tp) {
- int i;
- __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
- __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
+ pdata->t19_keymap = keymap;
+ }
- for (i = 0; i < MXT_NUM_GPIO; i++)
- if (pdata->key_map[i] != KEY_RESERVED)
- __set_bit(pdata->key_map[i], input_dev->keybit);
+ return pdata;
+}
+#else
+static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
+{
+ dev_dbg(&client->dev, "No platform data specified\n");
+ return ERR_PTR(-EINVAL);
+}
+#endif
- __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
- __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
- __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
- __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
- __set_bit(BTN_TOOL_QUINTTAP, input_dev->keybit);
+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;
- 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);
+ pdata = dev_get_platdata(&client->dev);
+ if (!pdata) {
+ pdata = mxt_parse_dt(client);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
}
- /* 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);
- input_set_abs_params(input_dev, ABS_PRESSURE,
- 0, 255, 0, 0);
+ data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
+ if (!data) {
+ dev_err(&client->dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
- /* For multi touch */
- num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
- error = input_mt_init_slots(input_dev, num_mt_slots, 0);
- if (error)
- goto err_free_object;
- input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
- 0, MXT_MAX_AREA, 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);
- input_set_abs_params(input_dev, ABS_MT_PRESSURE,
- 0, 255, 0, 0);
+ snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
+ client->adapter->nr, client->addr);
- input_set_drvdata(input_dev, data);
+ 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_object;
+ goto err_free_mem;
}
- error = mxt_make_highchg(data);
- if (error)
- goto err_free_irq;
+ disable_irq(client->irq);
- error = input_register_device(input_dev);
+ error = mxt_initialize(data);
if (error)
goto err_free_irq;
error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
- if (error)
- goto err_unregister_device;
+ if (error) {
+ dev_err(&client->dev, "Failure %d creating sysfs group\n",
+ error);
+ goto err_free_object;
+ }
return 0;
-err_unregister_device:
- input_unregister_device(input_dev);
- input_dev = NULL;
+err_free_object:
+ mxt_free_object_table(data);
err_free_irq:
free_irq(client->irq, data);
-err_free_object:
- kfree(data->object_table);
err_free_mem:
- input_free_device(input_dev);
kfree(data);
return error;
}
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
free_irq(data->irq, data);
input_unregister_device(data->input_dev);
- kfree(data->object_table);
+ mxt_free_object_table(data);
kfree(data);
return 0;
struct mxt_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
- /* Soft reset */
- mxt_write_object(data, MXT_GEN_COMMAND_T6,
- MXT_COMMAND_RESET, 1);
-
- msleep(MXT_RESET_TIME);
+ mxt_soft_reset(data);
mutex_lock(&input_dev->mutex);
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);
+
static const struct i2c_device_id mxt_id[] = {
{ "qt602240_ts", 0 },
{ "atmel_mxt_ts", 0 },
.driver = {
.name = "atmel_mxt_ts",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mxt_of_match),
.pm = &mxt_pm_ops,
},
.probe = mxt_probe,
git.openpandora.org / pandora-kernel.git / blobdiff