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path: root/drivers/input/touchscreen/atmel_mxt_ts.c
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Diffstat (limited to 'drivers/input/touchscreen/atmel_mxt_ts.c')
-rw-r--r--drivers/input/touchscreen/atmel_mxt_ts.c1085
1 files changed, 640 insertions, 445 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index dd042a9b0aaa..dd0544cc1bc1 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Atmel maXTouch Touchscreen driver
*
@@ -7,12 +8,6 @@
* Copyright (C) 2016 Zodiac Inflight Innovations
*
* 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>
@@ -23,16 +18,21 @@
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
-#include <linux/platform_data/atmel_mxt_ts.h>
#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <linux/of.h>
+#include <linux/property.h>
#include <linux/slab.h>
-#include <asm/unaligned.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gpio/consumer.h>
+#include <linux/unaligned.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
+#include <dt-bindings/input/atmel-maxtouch.h>
/* Firmware files */
#define MXT_FW_NAME "maxtouch.fw"
@@ -56,6 +56,7 @@
#define MXT_TOUCH_KEYARRAY_T15 15
#define MXT_TOUCH_PROXIMITY_T23 23
#define MXT_TOUCH_PROXKEY_T52 52
+#define MXT_TOUCH_PTC_KEYS_T97 97
#define MXT_PROCI_GRIPFACE_T20 20
#define MXT_PROCG_NOISE_T22 22
#define MXT_PROCI_ONETOUCH_T24 24
@@ -73,6 +74,7 @@
#define MXT_SPT_DIGITIZER_T43 43
#define MXT_SPT_MESSAGECOUNT_T44 44
#define MXT_SPT_CTECONFIG_T46 46
+#define MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71
#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
/* MXT_GEN_MESSAGE_T5 object */
@@ -86,12 +88,12 @@
#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)
+#define MXT_T6_STATUS_RESET BIT(7)
+#define MXT_T6_STATUS_OFL BIT(6)
+#define MXT_T6_STATUS_SIGERR BIT(5)
+#define MXT_T6_STATUS_CAL BIT(4)
+#define MXT_T6_STATUS_CFGERR BIT(3)
+#define MXT_T6_STATUS_COMSERR BIT(2)
/* MXT_GEN_POWER_T7 field */
struct t7_config {
@@ -110,14 +112,14 @@ struct t7_config {
#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)
+#define MXT_T9_UNGRIP BIT(0)
+#define MXT_T9_SUPPRESS BIT(1)
+#define MXT_T9_AMP BIT(2)
+#define MXT_T9_VECTOR BIT(3)
+#define MXT_T9_MOVE BIT(4)
+#define MXT_T9_RELEASE BIT(5)
+#define MXT_T9_PRESS BIT(6)
+#define MXT_T9_DETECT BIT(7)
struct t9_range {
__le16 x;
@@ -125,13 +127,14 @@ struct t9_range {
} __packed;
/* MXT_TOUCH_MULTI_T9 orient */
-#define MXT_T9_ORIENT_SWITCH (1 << 0)
-#define MXT_T9_ORIENT_INVERTX (1 << 1)
-#define MXT_T9_ORIENT_INVERTY (1 << 2)
+#define MXT_T9_ORIENT_SWITCH BIT(0)
+#define MXT_T9_ORIENT_INVERTX BIT(1)
+#define MXT_T9_ORIENT_INVERTY BIT(2)
/* MXT_SPT_COMMSCONFIG_T18 */
#define MXT_COMMS_CTRL 0
#define MXT_COMMS_CMD 1
+#define MXT_COMMS_RETRIGEN BIT(6)
/* MXT_DEBUG_DIAGNOSTIC_T37 */
#define MXT_DIAGNOSTIC_PAGEUP 0x01
@@ -192,11 +195,14 @@ enum t100_type {
/* Delay times */
#define MXT_BACKUP_TIME 50 /* msec */
+#define MXT_RESET_GPIO_TIME 20 /* msec */
+#define MXT_RESET_INVALID_CHG 100 /* 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 */
+#define MXT_WAKEUP_TIME 25 /* msec */
/* Command to unlock bootloader */
#define MXT_UNLOCK_CMD_MSB 0xaa
@@ -210,7 +216,7 @@ enum t100_type {
#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_EXTENDED_ID BIT(5)
#define MXT_BOOT_ID_MASK 0x1f
/* Touchscreen absolute values */
@@ -257,14 +263,22 @@ enum v4l_dbg_inputs {
MXT_V4L_INPUT_MAX,
};
-static const struct v4l2_file_operations mxt_video_fops = {
- .owner = THIS_MODULE,
- .open = v4l2_fh_open,
- .release = vb2_fop_release,
- .unlocked_ioctl = video_ioctl2,
- .read = vb2_fop_read,
- .mmap = vb2_fop_mmap,
- .poll = vb2_fop_poll,
+enum mxt_suspend_mode {
+ MXT_SUSPEND_DEEP_SLEEP = 0,
+ MXT_SUSPEND_T9_CTRL = 1,
+};
+
+/* Config update context */
+struct mxt_cfg {
+ u8 *raw;
+ size_t raw_size;
+ off_t raw_pos;
+
+ u8 *mem;
+ size_t mem_size;
+ int start_ofs;
+
+ struct mxt_info info;
};
/* Each client has this additional data */
@@ -272,9 +286,9 @@ 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;
+ struct mxt_info *info;
+ void *raw_info_block;
unsigned int irq;
unsigned int max_x;
unsigned int max_y;
@@ -300,6 +314,10 @@ struct mxt_data {
u8 multitouch;
struct t7_config t7_cfg;
struct mxt_dbg dbg;
+ struct regulator_bulk_data regulators[2];
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *wake_gpio;
+ bool use_retrigen_workaround;
/* Cached parameters from object table */
u16 T5_address;
@@ -307,10 +325,16 @@ struct mxt_data {
u8 T6_reportid;
u16 T6_address;
u16 T7_address;
+ u16 T71_address;
u8 T9_reportid_min;
u8 T9_reportid_max;
+ u8 T15_reportid_min;
+ u8 T15_reportid_max;
+ u16 T18_address;
u8 T19_reportid;
u16 T44_address;
+ u8 T97_reportid_min;
+ u8 T97_reportid_max;
u8 T100_reportid_min;
u8 T100_reportid_max;
@@ -322,6 +346,18 @@ struct mxt_data {
/* for config update handling */
struct completion crc_completion;
+
+ u32 *t19_keymap;
+ unsigned int t19_num_keys;
+
+ u32 *t15_keymap;
+ unsigned int t15_num_keys;
+
+ enum mxt_suspend_mode suspend_mode;
+
+ u32 wakeup_method;
+
+ struct touchscreen_properties prop;
};
struct mxt_vb2_buffer {
@@ -350,6 +386,7 @@ static bool mxt_object_readable(unsigned int type)
case MXT_TOUCH_KEYARRAY_T15:
case MXT_TOUCH_PROXIMITY_T23:
case MXT_TOUCH_PROXKEY_T52:
+ case MXT_TOUCH_PTC_KEYS_T97:
case MXT_TOUCH_MULTITOUCHSCREEN_T100:
case MXT_PROCI_GRIPFACE_T20:
case MXT_PROCG_NOISE_T22:
@@ -367,6 +404,7 @@ static bool mxt_object_readable(unsigned int type)
case MXT_SPT_USERDATA_T38:
case MXT_SPT_DIGITIZER_T43:
case MXT_SPT_CTECONFIG_T46:
+ case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
return true;
default:
return false;
@@ -448,16 +486,17 @@ static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
{
u8 appmode = data->client->addr;
u8 bootloader;
+ u8 family_id = data->info ? data->info->family_id : 0;
switch (appmode) {
case 0x4a:
case 0x4b:
/* Chips after 1664S use different scheme */
- if (retry || data->info.family_id >= 0xa2) {
+ if (retry || family_id >= 0xa2) {
bootloader = appmode - 0x24;
break;
}
- /* Fall through for normal case */
+ fallthrough; /* for normal case */
case 0x4c:
case 0x4d:
case 0x5a:
@@ -586,7 +625,6 @@ recheck:
static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
{
- int ret;
u8 buf[2];
if (unlock) {
@@ -597,17 +635,45 @@ static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
buf[1] = 0x01;
}
- ret = mxt_bootloader_write(data, buf, 2);
- if (ret)
- return ret;
+ return mxt_bootloader_write(data, buf, sizeof(buf));
+}
- return 0;
+static bool mxt_wakeup_toggle(struct i2c_client *client,
+ bool wake_up, bool in_i2c)
+{
+ struct mxt_data *data = i2c_get_clientdata(client);
+
+ switch (data->wakeup_method) {
+ case ATMEL_MXT_WAKEUP_I2C_SCL:
+ if (!in_i2c)
+ return false;
+ break;
+
+ case ATMEL_MXT_WAKEUP_GPIO:
+ if (in_i2c)
+ return false;
+
+ gpiod_set_value(data->wake_gpio, wake_up);
+ break;
+
+ default:
+ return false;
+ }
+
+ if (wake_up) {
+ dev_dbg(&client->dev, "waking up controller\n");
+
+ msleep(MXT_WAKEUP_TIME);
+ }
+
+ return true;
}
static int __mxt_read_reg(struct i2c_client *client,
u16 reg, u16 len, void *val)
{
struct i2c_msg xfer[2];
+ bool retried = false;
u8 buf[2];
int ret;
@@ -626,9 +692,13 @@ static int __mxt_read_reg(struct i2c_client *client,
xfer[1].len = len;
xfer[1].buf = val;
+retry:
ret = i2c_transfer(client->adapter, xfer, 2);
if (ret == 2) {
ret = 0;
+ } else if (!retried && mxt_wakeup_toggle(client, true, true)) {
+ retried = true;
+ goto retry;
} else {
if (ret >= 0)
ret = -EIO;
@@ -642,6 +712,7 @@ static int __mxt_read_reg(struct i2c_client *client,
static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
const void *val)
{
+ bool retried = false;
u8 *buf;
size_t count;
int ret;
@@ -655,9 +726,13 @@ static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
buf[1] = (reg >> 8) & 0xff;
memcpy(&buf[2], val, len);
+retry:
ret = i2c_master_send(client, buf, count);
if (ret == count) {
ret = 0;
+ } else if (!retried && mxt_wakeup_toggle(client, true, true)) {
+ retried = true;
+ goto retry;
} else {
if (ret >= 0)
ret = -EIO;
@@ -680,7 +755,7 @@ mxt_get_object(struct mxt_data *data, u8 type)
struct mxt_object *object;
int i;
- for (i = 0; i < data->info.object_num; i++) {
+ for (i = 0; i < data->info->object_num; i++) {
object = data->object_table + i;
if (object->type == type)
return object;
@@ -696,13 +771,13 @@ static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
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);
}
+ complete(&data->crc_completion);
+
/* Detect reset */
if (status & MXT_T6_STATUS_RESET)
complete(&data->reset_completion);
@@ -740,15 +815,14 @@ static int mxt_write_object(struct mxt_data *data,
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;
int i;
- for (i = 0; i < pdata->t19_num_keys; i++) {
- if (pdata->t19_keymap[i] == KEY_RESERVED)
+ for (i = 0; i < data->t19_num_keys; i++) {
+ if (data->t19_keymap[i] == KEY_RESERVED)
continue;
/* Active-low switch */
- input_report_key(input, pdata->t19_keymap[i],
+ input_report_key(input, data->t19_keymap[i],
!(message[1] & BIT(i)));
}
}
@@ -756,7 +830,7 @@ static void mxt_input_button(struct mxt_data *data, u8 *message)
static void mxt_input_sync(struct mxt_data *data)
{
input_mt_report_pointer_emulation(data->input_dev,
- data->pdata->t19_num_keys);
+ data->t19_num_keys);
input_sync(data->input_dev);
}
@@ -807,25 +881,45 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
* have happened.
*/
if (status & MXT_T9_RELEASE) {
- input_mt_report_slot_state(input_dev,
- MT_TOOL_FINGER, 0);
+ input_mt_report_slot_inactive(input_dev);
mxt_input_sync(data);
}
+ /* if active, pressure must be non-zero */
+ if (!amplitude)
+ amplitude = MXT_PRESSURE_DEFAULT;
+
/* 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);
+ touchscreen_report_pos(input_dev, &data->prop, x, y, true);
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);
+ input_mt_report_slot_inactive(input_dev);
}
data->update_input = true;
}
+static void mxt_proc_t15_messages(struct mxt_data *data, u8 *message)
+{
+ struct input_dev *input_dev = data->input_dev;
+ unsigned long keystates = get_unaligned_le32(&message[2]);
+ int key;
+
+ for (key = 0; key < data->t15_num_keys; key++)
+ input_report_key(input_dev, data->t15_keymap[key],
+ keystates & BIT(key));
+
+ data->update_input = true;
+}
+
+static void mxt_proc_t97_messages(struct mxt_data *data, u8 *message)
+{
+ mxt_proc_t15_messages(data, message);
+}
+
static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
{
struct device *dev = &data->client->dev;
@@ -918,8 +1012,7 @@ static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
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);
+ touchscreen_report_pos(input_dev, &data->prop, x, y, true);
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);
@@ -928,7 +1021,7 @@ static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
dev_dbg(dev, "[%u] release\n", id);
/* close out slot */
- input_mt_report_slot_state(input_dev, 0, 0);
+ input_mt_report_slot_inactive(input_dev);
}
data->update_input = true;
@@ -952,6 +1045,12 @@ static int mxt_proc_message(struct mxt_data *data, u8 *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->T15_reportid_min &&
+ report_id <= data->T15_reportid_max) {
+ mxt_proc_t15_messages(data, message);
+ } else if (report_id >= data->T97_reportid_min &&
+ report_id <= data->T97_reportid_max) {
+ mxt_proc_t97_messages(data, message);
} else if (report_id >= data->T100_reportid_min &&
report_id <= data->T100_reportid_max) {
mxt_proc_t100_message(data, message);
@@ -1172,9 +1271,11 @@ static int mxt_acquire_irq(struct mxt_data *data)
enable_irq(data->irq);
- error = mxt_process_messages_until_invalid(data);
- if (error)
- return error;
+ if (data->use_retrigen_workaround) {
+ error = mxt_process_messages_until_invalid(data);
+ if (error)
+ return error;
+ }
return 0;
}
@@ -1195,7 +1296,7 @@ static int mxt_soft_reset(struct mxt_data *data)
return ret;
/* Ignore CHG line for 100ms after reset */
- msleep(100);
+ msleep(MXT_RESET_INVALID_CHG);
mxt_acquire_irq(data);
@@ -1264,12 +1365,39 @@ static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
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)
+static int mxt_check_retrigen(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ int error;
+ int val;
+ struct irq_data *irqd;
+
+ data->use_retrigen_workaround = false;
+
+ irqd = irq_get_irq_data(data->irq);
+ if (!irqd)
+ return -EINVAL;
+
+ if (irqd_is_level_type(irqd))
+ return 0;
+
+ if (data->T18_address) {
+ error = __mxt_read_reg(client,
+ data->T18_address + MXT_COMMS_CTRL,
+ 1, &val);
+ if (error)
+ return error;
+
+ if (val & MXT_COMMS_RETRIGEN)
+ return 0;
+ }
+
+ dev_warn(&client->dev, "Enabling RETRIGEN workaround\n");
+ data->use_retrigen_workaround = true;
+ return 0;
+}
+
+static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
{
struct device *dev = &data->client->dev;
struct mxt_object *object;
@@ -1280,9 +1408,9 @@ static int mxt_prepare_cfg_mem(struct mxt_data *data,
u16 reg;
u8 val;
- while (data_pos < cfg->size) {
+ while (cfg->raw_pos < cfg->raw_size) {
/* Read type, instance, length */
- ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
+ ret = sscanf(cfg->raw + cfg->raw_pos, "%x %x %x%n",
&type, &instance, &size, &offset);
if (ret == 0) {
/* EOF */
@@ -1291,20 +1419,20 @@ static int mxt_prepare_cfg_mem(struct mxt_data *data,
dev_err(dev, "Bad format: failed to parse object\n");
return -EINVAL;
}
- data_pos += offset;
+ cfg->raw_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",
+ ret = sscanf(cfg->raw + cfg->raw_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;
+ cfg->raw_pos += offset;
}
continue;
}
@@ -1339,7 +1467,7 @@ static int mxt_prepare_cfg_mem(struct mxt_data *data,
reg = object->start_address + mxt_obj_size(object) * instance;
for (i = 0; i < size; i++) {
- ret = sscanf(cfg->data + data_pos, "%hhx%n",
+ ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n",
&val,
&offset);
if (ret != 1) {
@@ -1347,15 +1475,15 @@ static int mxt_prepare_cfg_mem(struct mxt_data *data,
type, i);
return -EINVAL;
}
- data_pos += offset;
+ cfg->raw_pos += offset;
if (i > mxt_obj_size(object))
continue;
- byte_offset = reg + i - cfg_start_ofs;
+ byte_offset = reg + i - cfg->start_ofs;
- if (byte_offset >= 0 && byte_offset < config_mem_size) {
- *(config_mem + byte_offset) = val;
+ if (byte_offset >= 0 && byte_offset < cfg->mem_size) {
+ *(cfg->mem + byte_offset) = val;
} else {
dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
reg, object->type, byte_offset);
@@ -1367,22 +1495,21 @@ static int mxt_prepare_cfg_mem(struct mxt_data *data,
return 0;
}
-static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
- u8 *config_mem, size_t config_mem_size)
+static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
{
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;
+ while (byte_offset < cfg->mem_size) {
+ unsigned int size = cfg->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);
+ cfg->start_ofs + byte_offset,
+ size, cfg->mem + byte_offset);
if (error) {
dev_err(&data->client->dev,
"Config write error, ret=%d\n", error);
@@ -1416,65 +1543,75 @@ static int mxt_init_t7_power_cfg(struct mxt_data *data);
* <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)
+static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw)
{
struct device *dev = &data->client->dev;
- struct mxt_info cfg_info;
+ struct mxt_cfg cfg;
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;
+ u16 crc_start = 0;
+
+ /* Make zero terminated copy of the OBP_RAW file */
+ cfg.raw = kmemdup_nul(fw->data, fw->size, GFP_KERNEL);
+ if (!cfg.raw)
+ return -ENOMEM;
+
+ cfg.raw_size = fw->size;
mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
- if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
+ if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
dev_err(dev, "Unrecognised config file\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto release_raw;
}
- data_pos = strlen(MXT_CFG_MAGIC);
+ cfg.raw_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,
+ ret = sscanf(cfg.raw + cfg.raw_pos, "%hhx%n",
+ (unsigned char *)&cfg.info + i,
&offset);
if (ret != 1) {
dev_err(dev, "Bad format\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto release_raw;
}
- data_pos += offset;
+ cfg.raw_pos += offset;
}
- if (cfg_info.family_id != data->info.family_id) {
+ if (cfg.info.family_id != data->info->family_id) {
dev_err(dev, "Family ID mismatch!\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto release_raw;
}
- if (cfg_info.variant_id != data->info.variant_id) {
+ if (cfg.info.variant_id != data->info->variant_id) {
dev_err(dev, "Variant ID mismatch!\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto release_raw;
}
/* Read CRCs */
- ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
+ ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &info_crc, &offset);
if (ret != 1) {
dev_err(dev, "Bad format: failed to parse Info CRC\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto release_raw;
}
- data_pos += offset;
+ cfg.raw_pos += offset;
- ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
+ ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &config_crc, &offset);
if (ret != 1) {
dev_err(dev, "Bad format: failed to parse Config CRC\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto release_raw;
}
- data_pos += offset;
+ cfg.raw_pos += offset;
/*
* The Info Block CRC is calculated over mxt_info and the object
@@ -1488,7 +1625,8 @@ static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
} else if (config_crc == data->config_crc) {
dev_dbg(dev, "Config CRC 0x%06X: OK\n",
data->config_crc);
- return 0;
+ ret = 0;
+ goto release_raw;
} else {
dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
data->config_crc, config_crc);
@@ -1500,44 +1638,48 @@ static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
}
/* Malloc memory to store configuration */
- cfg_start_ofs = MXT_OBJECT_START +
- data->info.object_num * sizeof(struct mxt_object) +
+ 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;
+ cfg.mem_size = data->mem_size - cfg.start_ofs;
+ cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL);
+ if (!cfg.mem) {
+ ret = -ENOMEM;
+ goto release_raw;
}
- ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
- config_mem, config_mem_size);
+ ret = mxt_prepare_cfg_mem(data, &cfg);
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;
- }
+ if (data->T71_address)
+ crc_start = data->T71_address;
+ else if (data->T7_address)
+ crc_start = data->T7_address;
+ else
+ dev_warn(dev, "Could not find CRC start\n");
- calculated_crc = mxt_calculate_crc(config_mem,
- data->T7_address - cfg_start_ofs,
- config_mem_size);
+ if (crc_start > cfg.start_ofs) {
+ calculated_crc = mxt_calculate_crc(cfg.mem,
+ crc_start - cfg.start_ofs,
+ cfg.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);
+ if (config_crc > 0 && config_crc != calculated_crc)
+ dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n",
+ calculated_crc, config_crc);
+ }
- ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
- config_mem, config_mem_size);
+ ret = mxt_upload_cfg_mem(data, &cfg);
if (ret)
goto release_mem;
mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
+ ret = mxt_check_retrigen(data);
+ if (ret)
+ goto release_mem;
+
ret = mxt_soft_reset(data);
if (ret)
goto release_mem;
@@ -1548,24 +1690,12 @@ static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
mxt_init_t7_power_cfg(data);
release_mem:
- kfree(config_mem);
+ kfree(cfg.mem);
+release_raw:
+ kfree(cfg.raw);
return ret;
}
-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, 0, sizeof(*info), info);
- if (error)
- return error;
-
- return 0;
-}
-
static void mxt_free_input_device(struct mxt_data *data)
{
if (data->input_dev) {
@@ -1580,52 +1710,43 @@ static void mxt_free_object_table(struct mxt_data *data)
video_unregister_device(&data->dbg.vdev);
v4l2_device_unregister(&data->dbg.v4l2);
#endif
-
- kfree(data->object_table);
data->object_table = NULL;
+ data->info = NULL;
+ kfree(data->raw_info_block);
+ data->raw_info_block = 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->T71_address = 0;
data->T9_reportid_min = 0;
data->T9_reportid_max = 0;
+ data->T15_reportid_min = 0;
+ data->T15_reportid_max = 0;
+ data->T18_address = 0;
data->T19_reportid = 0;
data->T44_address = 0;
+ data->T97_reportid_min = 0;
+ data->T97_reportid_max = 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)
+static int mxt_parse_object_table(struct mxt_data *data,
+ struct mxt_object *object_table)
{
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++) {
+ for (i = 0; i < data->info->object_num; i++) {
struct mxt_object *object = object_table + i;
u8 min_id, max_id;
@@ -1649,8 +1770,8 @@ static int mxt_get_object_table(struct mxt_data *data)
switch (object->type) {
case MXT_GEN_MESSAGE_T5:
- if (data->info.family_id == 0x80 &&
- data->info.version < 0x20) {
+ 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
@@ -1670,12 +1791,23 @@ static int mxt_get_object_table(struct mxt_data *data)
case MXT_GEN_POWER_T7:
data->T7_address = object->start_address;
break;
+ case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
+ data->T71_address = object->start_address;
+ break;
case MXT_TOUCH_MULTI_T9:
data->multitouch = MXT_TOUCH_MULTI_T9;
+ /* Only handle messages from first T9 instance */
data->T9_reportid_min = min_id;
- data->T9_reportid_max = max_id;
- data->num_touchids = object->num_report_ids
- * mxt_obj_instances(object);
+ data->T9_reportid_max = min_id +
+ object->num_report_ids - 1;
+ data->num_touchids = object->num_report_ids;
+ break;
+ case MXT_TOUCH_KEYARRAY_T15:
+ data->T15_reportid_min = min_id;
+ data->T15_reportid_max = max_id;
+ break;
+ case MXT_SPT_COMMSCONFIG_T18:
+ data->T18_address = object->start_address;
break;
case MXT_SPT_MESSAGECOUNT_T44:
data->T44_address = object->start_address;
@@ -1683,6 +1815,10 @@ static int mxt_get_object_table(struct mxt_data *data)
case MXT_SPT_GPIOPWM_T19:
data->T19_reportid = min_id;
break;
+ case MXT_TOUCH_PTC_KEYS_T97:
+ data->T97_reportid_min = min_id;
+ data->T97_reportid_max = max_id;
+ break;
case MXT_TOUCH_MULTITOUCHSCREEN_T100:
data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
data->T100_reportid_min = min_id;
@@ -1705,24 +1841,102 @@ static int mxt_get_object_table(struct mxt_data *data)
/* 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;
+ return -EINVAL;
}
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");
+ if (!data->msg_buf)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int mxt_read_info_block(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ int error;
+ size_t size;
+ void *id_buf, *buf;
+ uint8_t num_objects;
+ u32 calculated_crc;
+ u8 *crc_ptr;
+
+ /* If info block already allocated, free it */
+ if (data->raw_info_block)
+ mxt_free_object_table(data);
+
+ /* Read 7-byte ID information block starting at address 0 */
+ size = sizeof(struct mxt_info);
+ id_buf = kzalloc(size, GFP_KERNEL);
+ if (!id_buf)
+ return -ENOMEM;
+
+ error = __mxt_read_reg(client, 0, size, id_buf);
+ if (error)
+ goto err_free_mem;
+
+ /* Resize buffer to give space for rest of info block */
+ num_objects = ((struct mxt_info *)id_buf)->object_num;
+ size += (num_objects * sizeof(struct mxt_object))
+ + MXT_INFO_CHECKSUM_SIZE;
+
+ buf = krealloc(id_buf, size, GFP_KERNEL);
+ if (!buf) {
error = -ENOMEM;
- goto free_object_table;
+ goto err_free_mem;
+ }
+ id_buf = buf;
+
+ /* Read rest of info block */
+ error = __mxt_read_reg(client, MXT_OBJECT_START,
+ size - MXT_OBJECT_START,
+ id_buf + MXT_OBJECT_START);
+ if (error)
+ goto err_free_mem;
+
+ /* Extract & calculate checksum */
+ crc_ptr = id_buf + size - MXT_INFO_CHECKSUM_SIZE;
+ data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16);
+
+ calculated_crc = mxt_calculate_crc(id_buf, 0,
+ size - MXT_INFO_CHECKSUM_SIZE);
+
+ /*
+ * CRC mismatch can be caused by data corruption due to I2C comms
+ * issue or else device is not using Object Based Protocol (eg i2c-hid)
+ */
+ if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) {
+ dev_err(&client->dev,
+ "Info Block CRC error calculated=0x%06X read=0x%06X\n",
+ calculated_crc, data->info_crc);
+ error = -EIO;
+ goto err_free_mem;
+ }
+
+ data->raw_info_block = id_buf;
+ data->info = (struct mxt_info *)id_buf;
+
+ dev_info(&client->dev,
+ "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
+ data->info->family_id, data->info->variant_id,
+ data->info->version >> 4, data->info->version & 0xf,
+ data->info->build, data->info->object_num);
+
+ /* Parse object table information */
+ error = mxt_parse_object_table(data, id_buf + MXT_OBJECT_START);
+ if (error) {
+ dev_err(&client->dev, "Error %d parsing object table\n", error);
+ mxt_free_object_table(data);
+ return error;
}
- data->object_table = object_table;
+ data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START);
return 0;
-free_object_table:
- mxt_free_object_table(data);
+err_free_mem:
+ kfree(id_buf);
return error;
}
@@ -1856,7 +2070,6 @@ 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";
@@ -1870,20 +2083,20 @@ static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
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)
+ for (i = 0; i < data->t19_num_keys; i++)
+ if (data->t19_keymap[i] != KEY_RESERVED)
input_set_capability(input_dev, EV_KEY,
- pdata->t19_keymap[i]);
+ data->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;
+ int i;
switch (data->multitouch) {
case MXT_TOUCH_MULTI_T9:
@@ -1919,10 +2132,8 @@ static int mxt_initialize_input_device(struct mxt_data *data)
/* Register input device */
input_dev = input_allocate_device();
- if (!input_dev) {
- dev_err(dev, "Failed to allocate memory\n");
+ if (!input_dev)
return -ENOMEM;
- }
input_dev->name = "Atmel maXTouch Touchscreen";
input_dev->phys = data->phys;
@@ -1931,6 +2142,10 @@ static int mxt_initialize_input_device(struct mxt_data *data)
input_dev->open = mxt_input_open;
input_dev->close = mxt_input_close;
+ input_dev->keycode = data->t15_keymap;
+ input_dev->keycodemax = data->t15_num_keys;
+ input_dev->keycodesize = sizeof(data->t15_keymap[0]);
+
input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
/* For single touch */
@@ -1944,7 +2159,7 @@ static int mxt_initialize_input_device(struct mxt_data *data)
}
/* If device has buttons we assume it is a touchpad */
- if (pdata->t19_num_keys) {
+ if (data->t19_num_keys) {
mxt_set_up_as_touchpad(input_dev, data);
mt_flags |= INPUT_MT_POINTER;
} else {
@@ -1993,17 +2208,20 @@ static int mxt_initialize_input_device(struct mxt_data *data)
}
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);
}
+ touchscreen_parse_properties(input_dev, true, &data->prop);
+
+ /* For T15 and T97 Key Array */
+ if (data->T15_reportid_min || data->T97_reportid_min) {
+ for (i = 0; i < data->t15_num_keys; i++)
+ input_set_capability(input_dev,
+ EV_KEY, data->t15_keymap[i]);
+ }
+
input_set_drvdata(input_dev, data);
error = input_register_device(input_dev);
@@ -2037,7 +2255,7 @@ static int mxt_initialize(struct mxt_data *data)
int error;
while (1) {
- error = mxt_get_info(data);
+ error = mxt_read_info_block(data);
if (!error)
break;
@@ -2068,16 +2286,13 @@ static int mxt_initialize(struct mxt_data *data)
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);
+ error = mxt_check_retrigen(data);
+ if (error)
return error;
- }
error = mxt_acquire_irq(data);
if (error)
- goto err_free_object_table;
+ return error;
error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
&client->dev, GFP_KERNEL, data,
@@ -2085,14 +2300,10 @@ static int mxt_initialize(struct mxt_data *data)
if (error) {
dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
error);
- goto err_free_object_table;
+ return error;
}
return 0;
-
-err_free_object_table:
- mxt_free_object_table(data);
- return error;
}
static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
@@ -2150,10 +2361,20 @@ recheck:
}
#ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
+static const struct v4l2_file_operations mxt_video_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .unlocked_ioctl = video_ioctl2,
+ .read = vb2_fop_read,
+ .mmap = vb2_fop_mmap,
+ .poll = vb2_fop_poll,
+};
+
static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
unsigned int y)
{
- struct mxt_info *info = &data->info;
+ struct mxt_info *info = data->info;
struct mxt_dbg *dbg = &data->dbg;
unsigned int ofs, page;
unsigned int col = 0;
@@ -2317,8 +2538,6 @@ fault:
static const struct vb2_ops mxt_queue_ops = {
.queue_setup = mxt_queue_setup,
.buf_queue = mxt_buffer_queue,
- .wait_prepare = vb2_ops_wait_prepare,
- .wait_finish = vb2_ops_wait_finish,
};
static const struct vb2_queue mxt_queue = {
@@ -2328,7 +2547,7 @@ static const struct vb2_queue mxt_queue = {
.ops = &mxt_queue_ops,
.mem_ops = &vb2_vmalloc_memops,
.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
- .min_buffers_needed = 1,
+ .min_queued_buffers = 1,
};
static int mxt_vidioc_querycap(struct file *file, void *priv,
@@ -2336,8 +2555,8 @@ static int mxt_vidioc_querycap(struct file *file, void *priv,
{
struct mxt_data *data = video_drvdata(file);
- strlcpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
- strlcpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
+ strscpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
+ strscpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info),
"I2C:%s", dev_name(&data->client->dev));
return 0;
@@ -2353,11 +2572,11 @@ static int mxt_vidioc_enum_input(struct file *file, void *priv,
switch (i->index) {
case MXT_V4L_INPUT_REFS:
- strlcpy(i->name, "Mutual Capacitance References",
+ strscpy(i->name, "Mutual Capacitance References",
sizeof(i->name));
break;
case MXT_V4L_INPUT_DELTAS:
- strlcpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
+ strscpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
break;
}
@@ -2481,7 +2700,7 @@ static const struct video_device mxt_video_device = {
static void mxt_debug_init(struct mxt_data *data)
{
- struct mxt_info *info = &data->info;
+ struct mxt_info *info = data->info;
struct mxt_dbg *dbg = &data->dbg;
struct mxt_object *object;
int error;
@@ -2567,7 +2786,6 @@ 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;
error = mxt_init_t7_power_cfg(data);
@@ -2592,11 +2810,6 @@ static int mxt_configure_objects(struct mxt_data *data,
mxt_debug_init(data);
- 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;
}
@@ -2605,9 +2818,9 @@ 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);
+ struct mxt_info *info = data->info;
+ return sysfs_emit(buf, "%u.%u.%02X\n",
+ info->version >> 4, info->version & 0xf, info->build);
}
/* Hardware Version is returned as FamilyID.VariantID */
@@ -2615,9 +2828,8 @@ 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);
+ struct mxt_info *info = data->info;
+ return sysfs_emit(buf, "%u.%u\n", info->family_id, info->variant_id);
}
static ssize_t mxt_show_instance(char *buf, int count,
@@ -2627,19 +2839,18 @@ static ssize_t mxt_show_instance(char *buf, int count,
int i;
if (mxt_obj_instances(object) > 1)
- count += scnprintf(buf + count, PAGE_SIZE - count,
- "Instance %u\n", instance);
+ count += sysfs_emit_at(buf, 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");
+ count += sysfs_emit_at(buf, count, "\t[%2u]: %02x (%d)\n",
+ i, val[i], val[i]);
+ count += sysfs_emit_at(buf, count, "\n");
return count;
}
static ssize_t mxt_object_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
struct mxt_object *object;
@@ -2654,14 +2865,13 @@ static ssize_t mxt_object_show(struct device *dev,
return -ENOMEM;
error = 0;
- for (i = 0; i < data->info.object_num; i++) {
+ 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);
+ count += sysfs_emit_at(buf, count, "T%u:\n", object->type);
for (j = 0; j < mxt_obj_instances(object); j++) {
u16 size = mxt_obj_size(object);
@@ -2860,13 +3070,13 @@ static struct attribute *mxt_attrs[] = {
NULL
};
-static const struct attribute_group mxt_attr_group = {
- .attrs = mxt_attrs,
-};
+ATTRIBUTE_GROUPS(mxt);
static void mxt_start(struct mxt_data *data)
{
- switch (data->pdata->suspend_mode) {
+ mxt_wakeup_toggle(data->client, true, false);
+
+ switch (data->suspend_mode) {
case MXT_SUSPEND_T9_CTRL:
mxt_soft_reset(data);
@@ -2884,12 +3094,11 @@ static void mxt_start(struct mxt_data *data)
mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
break;
}
-
}
static void mxt_stop(struct mxt_data *data)
{
- switch (data->pdata->suspend_mode) {
+ switch (data->suspend_mode) {
case MXT_SUSPEND_T9_CTRL:
/* Touch disable */
mxt_write_object(data,
@@ -2901,6 +3110,8 @@ static void mxt_stop(struct mxt_data *data)
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
break;
}
+
+ mxt_wakeup_toggle(data->client, false, false);
}
static int mxt_input_open(struct input_dev *dev)
@@ -2919,131 +3130,102 @@ static void mxt_input_close(struct input_dev *dev)
mxt_stop(data);
}
-#ifdef CONFIG_OF
-static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
+static int mxt_parse_device_properties(struct mxt_data *data)
{
- struct mxt_platform_data *pdata;
- struct device_node *np = client->dev.of_node;
+ static const char keymap_property[] = "linux,gpio-keymap";
+ static const char buttons_property[] = "linux,keycodes";
+ struct device *dev = &data->client->dev;
u32 *keymap;
- int proplen, ret;
-
- if (!np)
- return ERR_PTR(-ENOENT);
-
- pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
- return ERR_PTR(-ENOMEM);
+ u32 *buttonmap;
+ int n_keys;
+ int error;
- if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
- pdata->t19_num_keys = proplen / sizeof(u32);
+ if (device_property_present(dev, keymap_property)) {
+ n_keys = device_property_count_u32(dev, keymap_property);
+ if (n_keys <= 0) {
+ error = n_keys < 0 ? n_keys : -EINVAL;
+ dev_err(dev, "invalid/malformed '%s' property: %d\n",
+ keymap_property, error);
+ return error;
+ }
- keymap = devm_kzalloc(&client->dev,
- pdata->t19_num_keys * sizeof(keymap[0]),
- GFP_KERNEL);
+ keymap = devm_kmalloc_array(dev, n_keys, sizeof(*keymap),
+ GFP_KERNEL);
if (!keymap)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
- ret = of_property_read_u32_array(np, "linux,gpio-keymap",
- keymap, pdata->t19_num_keys);
- if (ret)
- dev_warn(&client->dev,
- "Couldn't read linux,gpio-keymap: %d\n", ret);
+ error = device_property_read_u32_array(dev, keymap_property,
+ keymap, n_keys);
+ if (error) {
+ dev_err(dev, "failed to parse '%s' property: %d\n",
+ keymap_property, error);
+ return error;
+ }
- pdata->t19_keymap = keymap;
+ data->t19_keymap = keymap;
+ data->t19_num_keys = n_keys;
}
- pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
-
- return pdata;
-}
-#else
-static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
-{
- return ERR_PTR(-ENOENT);
-}
-#endif
-
-#ifdef CONFIG_ACPI
+ if (device_property_present(dev, buttons_property)) {
+ n_keys = device_property_count_u32(dev, buttons_property);
+ if (n_keys <= 0) {
+ error = n_keys < 0 ? n_keys : -EINVAL;
+ dev_err(dev, "invalid/malformed '%s' property: %d\n",
+ buttons_property, error);
+ return error;
+ }
-struct mxt_acpi_platform_data {
- const char *hid;
- struct mxt_platform_data pdata;
-};
+ buttonmap = devm_kmalloc_array(dev, n_keys, sizeof(*buttonmap),
+ GFP_KERNEL);
+ if (!buttonmap)
+ return -ENOMEM;
-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",
- },
- { }
-};
+ error = device_property_read_u32_array(dev, buttons_property,
+ buttonmap, n_keys);
+ if (error) {
+ dev_err(dev, "failed to parse '%s' property: %d\n",
+ buttons_property, error);
+ return error;
+ }
-static unsigned int chromebook_tp_buttons[] = {
- KEY_RESERVED,
- KEY_RESERVED,
- KEY_RESERVED,
- KEY_RESERVED,
- KEY_RESERVED,
- BTN_LEFT
-};
+ data->t15_keymap = buttonmap;
+ data->t15_num_keys = n_keys;
+ }
-static struct mxt_acpi_platform_data chromebook_platform_data[] = {
- {
- /* Touchpad */
- .hid = "ATML0000",
- .pdata = {
- .t19_num_keys = ARRAY_SIZE(chromebook_tp_buttons),
- .t19_keymap = chromebook_tp_buttons,
- },
- },
- {
- /* Touchscreen */
- .hid = "ATML0001",
- },
- { }
-};
+ return 0;
+}
-static const struct dmi_system_id mxt_dmi_table[] = {
+static const struct dmi_system_id chromebook_T9_suspend_dmi[] = {
{
- /* 2015 Google Pixel */
- .ident = "Chromebook Pixel 2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
},
- .driver_data = samus_platform_data,
},
{
- /* Other Google Chromebooks */
- .ident = "Chromebook",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
},
- .driver_data = chromebook_platform_data,
},
{ }
};
-static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
+static int mxt_probe(struct i2c_client *client)
{
- struct acpi_device *adev;
- const struct dmi_system_id *system_id;
- const struct mxt_acpi_platform_data *acpi_pdata;
+ struct mxt_data *data;
+ int error;
+
+ /*
+ * Ignore devices that do not have device properties attached to
+ * them, as we need help determining whether we are dealing with
+ * touch screen or touchpad.
+ *
+ * So far on x86 the only users of Atmel touch controllers are
+ * Chromebooks, and chromeos_laptop driver will ensure that
+ * necessary properties are provided (if firmware does not do that).
+ */
+ if (!device_property_present(&client->dev, "compatible"))
+ return -ENXIO;
/*
* Ignore ACPI devices representing bootloader mode.
@@ -3055,79 +3237,17 @@ static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
* 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;
+ if (ACPI_COMPANION(&client->dev) && client->addr < 0x40)
+ return -ENXIO;
- 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");
+ data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL);
+ if (!data)
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);
@@ -3135,53 +3255,118 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
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);
+ data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ?
+ MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP;
+
+ error = mxt_parse_device_properties(data);
+ if (error)
+ return error;
+
+ /*
+ * VDDA is the analog voltage supply 2.57..3.47 V
+ * VDD is the digital voltage supply 1.71..3.47 V
+ */
+ data->regulators[0].supply = "vdda";
+ data->regulators[1].supply = "vdd";
+ error = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(data->regulators),
+ data->regulators);
if (error) {
- dev_err(&client->dev, "Failed to register interrupt\n");
- goto err_free_mem;
+ if (error != -EPROBE_DEFER)
+ dev_err(&client->dev, "Failed to get regulators %d\n",
+ error);
+ return error;
}
- disable_irq(client->irq);
+ /* Request the RESET line as asserted so we go into reset */
+ data->reset_gpio = devm_gpiod_get_optional(&client->dev,
+ "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(data->reset_gpio)) {
+ error = PTR_ERR(data->reset_gpio);
+ dev_err(&client->dev, "Failed to get reset gpio: %d\n", error);
+ return error;
+ }
- error = mxt_initialize(data);
- if (error)
- goto err_free_irq;
+ /* Request the WAKE line as asserted so we go out of sleep */
+ data->wake_gpio = devm_gpiod_get_optional(&client->dev,
+ "wake", GPIOD_OUT_HIGH);
+ if (IS_ERR(data->wake_gpio)) {
+ error = PTR_ERR(data->wake_gpio);
+ dev_err(&client->dev, "Failed to get wake gpio: %d\n", error);
+ return error;
+ }
- error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
+ error = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, mxt_interrupt,
+ IRQF_ONESHOT | IRQF_NO_AUTOEN,
+ client->name, data);
if (error) {
- dev_err(&client->dev, "Failure %d creating sysfs group\n",
+ dev_err(&client->dev, "Failed to register interrupt\n");
+ return error;
+ }
+
+ error = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
+ data->regulators);
+ if (error) {
+ dev_err(&client->dev, "failed to enable regulators: %d\n",
error);
- goto err_free_object;
+ return error;
+ }
+ /*
+ * The device takes 40ms to come up after power-on according
+ * to the mXT224 datasheet, page 13.
+ */
+ msleep(MXT_BACKUP_TIME);
+
+ if (data->reset_gpio) {
+ /* Wait a while and then de-assert the RESET GPIO line */
+ msleep(MXT_RESET_GPIO_TIME);
+ gpiod_set_value_cansleep(data->reset_gpio, 0);
+ msleep(MXT_RESET_INVALID_CHG);
}
+ /*
+ * Controllers like mXT1386 have a dedicated WAKE line that could be
+ * connected to a GPIO or to I2C SCL pin, or permanently asserted low.
+ *
+ * This WAKE line is used for waking controller from a deep-sleep and
+ * it needs to be asserted low for 25 milliseconds before I2C transfers
+ * could be accepted by controller if it was in a deep-sleep mode.
+ * Controller will go into sleep automatically after 2 seconds of
+ * inactivity if WAKE line is deasserted and deep sleep is activated.
+ *
+ * If WAKE line is connected to I2C SCL pin, then the first I2C transfer
+ * will get an instant NAK and transfer needs to be retried after 25ms.
+ *
+ * If WAKE line is connected to a GPIO line, the line must be asserted
+ * 25ms before the host attempts to communicate with the controller.
+ */
+ device_property_read_u32(&client->dev, "atmel,wakeup-method",
+ &data->wakeup_method);
+
+ error = mxt_initialize(data);
+ if (error)
+ goto err_disable_regulators;
+
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);
+err_disable_regulators:
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators),
+ data->regulators);
return error;
}
-static int mxt_remove(struct i2c_client *client)
+static void 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);
+ disable_irq(data->irq);
mxt_free_input_device(data);
mxt_free_object_table(data);
- kfree(data);
-
- return 0;
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators),
+ data->regulators);
}
-static int __maybe_unused mxt_suspend(struct device *dev)
+static int mxt_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mxt_data *data = i2c_get_clientdata(client);
@@ -3192,15 +3377,17 @@ static int __maybe_unused mxt_suspend(struct device *dev)
mutex_lock(&input_dev->mutex);
- if (input_dev->users)
+ if (input_device_enabled(input_dev))
mxt_stop(data);
mutex_unlock(&input_dev->mutex);
+ disable_irq(data->irq);
+
return 0;
}
-static int __maybe_unused mxt_resume(struct device *dev)
+static int mxt_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mxt_data *data = i2c_get_clientdata(client);
@@ -3209,9 +3396,11 @@ static int __maybe_unused mxt_resume(struct device *dev)
if (!input_dev)
return 0;
+ enable_irq(data->irq);
+
mutex_lock(&input_dev->mutex);
- if (input_dev->users)
+ if (input_device_enabled(input_dev))
mxt_start(data);
mutex_unlock(&input_dev->mutex);
@@ -3219,10 +3408,15 @@ static int __maybe_unused mxt_resume(struct device *dev)
return 0;
}
-static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
static const struct of_device_id mxt_of_match[] = {
{ .compatible = "atmel,maxtouch", },
+ /* Compatibles listed below are deprecated */
+ { .compatible = "atmel,qt602240_ts", },
+ { .compatible = "atmel,atmel_mxt_ts", },
+ { .compatible = "atmel,atmel_mxt_tp", },
+ { .compatible = "atmel,mXT224", },
{},
};
MODULE_DEVICE_TABLE(of, mxt_of_match);
@@ -3237,11 +3431,11 @@ 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 },
- { "maxtouch", 0 },
- { "mXT224", 0 },
+ { "qt602240_ts" },
+ { "atmel_mxt_ts" },
+ { "atmel_mxt_tp" },
+ { "maxtouch" },
+ { "mXT224" },
{ }
};
MODULE_DEVICE_TABLE(i2c, mxt_id);
@@ -3249,9 +3443,10 @@ MODULE_DEVICE_TABLE(i2c, mxt_id);
static struct i2c_driver mxt_driver = {
.driver = {
.name = "atmel_mxt_ts",
- .of_match_table = of_match_ptr(mxt_of_match),
+ .dev_groups = mxt_groups,
+ .of_match_table = mxt_of_match,
.acpi_match_table = ACPI_PTR(mxt_acpi_id),
- .pm = &mxt_pm_ops,
+ .pm = pm_sleep_ptr(&mxt_pm_ops),
},
.probe = mxt_probe,
.remove = mxt_remove,
generated by cgit (git 2.34.1) at 2025-12-25 22:12:10 +0000