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path: root/drivers/input/touchscreen/zinitix.c
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Diffstat (limited to 'drivers/input/touchscreen/zinitix.c')
-rw-r--r--drivers/input/touchscreen/zinitix.c134
1 files changed, 130 insertions, 4 deletions
diff --git a/drivers/input/touchscreen/zinitix.c b/drivers/input/touchscreen/zinitix.c
index 1b4807ba4624..52b3950460e2 100644
--- a/drivers/input/touchscreen/zinitix.c
+++ b/drivers/input/touchscreen/zinitix.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
@@ -34,7 +35,13 @@
#define ZINITIX_DEBUG_REG 0x0115 /* 0~7 */
#define ZINITIX_TOUCH_MODE 0x0010
+
#define ZINITIX_CHIP_REVISION 0x0011
+#define ZINITIX_CHIP_BTX0X_MASK 0xF0F0
+#define ZINITIX_CHIP_BT4X2 0x4020
+#define ZINITIX_CHIP_BT4X3 0x4030
+#define ZINITIX_CHIP_BT4X4 0x4040
+
#define ZINITIX_FIRMWARE_VERSION 0x0012
#define ZINITIX_USB_DETECT 0x116
@@ -62,7 +69,11 @@
#define ZINITIX_Y_RESOLUTION 0x00C1
#define ZINITIX_POINT_STATUS_REG 0x0080
-#define ZINITIX_ICON_STATUS_REG 0x00AA
+
+#define ZINITIX_BT4X2_ICON_STATUS_REG 0x009A
+#define ZINITIX_BT4X3_ICON_STATUS_REG 0x00A0
+#define ZINITIX_BT4X4_ICON_STATUS_REG 0x00A0
+#define ZINITIX_BT5XX_ICON_STATUS_REG 0x00AA
#define ZINITIX_POINT_COORD_REG (ZINITIX_POINT_STATUS_REG + 2)
@@ -119,6 +130,7 @@
#define DEFAULT_TOUCH_POINT_MODE 2
#define MAX_SUPPORTED_FINGER_NUM 5
+#define MAX_SUPPORTED_BUTTON_NUM 8
#define CHIP_ON_DELAY 15 // ms
#define FIRMWARE_ON_DELAY 40 // ms
@@ -146,6 +158,13 @@ struct bt541_ts_data {
struct touchscreen_properties prop;
struct regulator_bulk_data supplies[2];
u32 zinitix_mode;
+ u32 keycodes[MAX_SUPPORTED_BUTTON_NUM];
+ int num_keycodes;
+ bool have_versioninfo;
+ u16 chip_revision;
+ u16 firmware_version;
+ u16 regdata_version;
+ u16 icon_status_reg;
};
static int zinitix_read_data(struct i2c_client *client,
@@ -190,11 +209,25 @@ static int zinitix_write_cmd(struct i2c_client *client, u16 reg)
return 0;
}
+static u16 zinitix_get_u16_reg(struct bt541_ts_data *bt541, u16 vreg)
+{
+ struct i2c_client *client = bt541->client;
+ int error;
+ __le16 val;
+
+ error = zinitix_read_data(client, vreg, (void *)&val, 2);
+ if (error)
+ return U8_MAX;
+
+ return le16_to_cpu(val);
+}
+
static int zinitix_init_touch(struct bt541_ts_data *bt541)
{
struct i2c_client *client = bt541->client;
int i;
int error;
+ u16 int_flags;
error = zinitix_write_cmd(client, ZINITIX_SWRESET_CMD);
if (error) {
@@ -202,6 +235,47 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541)
return error;
}
+ /*
+ * Read and cache the chip revision and firmware version the first time
+ * we get here.
+ */
+ if (!bt541->have_versioninfo) {
+ bt541->chip_revision = zinitix_get_u16_reg(bt541,
+ ZINITIX_CHIP_REVISION);
+ bt541->firmware_version = zinitix_get_u16_reg(bt541,
+ ZINITIX_FIRMWARE_VERSION);
+ bt541->regdata_version = zinitix_get_u16_reg(bt541,
+ ZINITIX_DATA_VERSION_REG);
+ bt541->have_versioninfo = true;
+
+ dev_dbg(&client->dev,
+ "chip revision %04x firmware version %04x regdata version %04x\n",
+ bt541->chip_revision, bt541->firmware_version,
+ bt541->regdata_version);
+
+ /*
+ * Determine the "icon" status register which varies by the
+ * chip.
+ */
+ switch (bt541->chip_revision & ZINITIX_CHIP_BTX0X_MASK) {
+ case ZINITIX_CHIP_BT4X2:
+ bt541->icon_status_reg = ZINITIX_BT4X2_ICON_STATUS_REG;
+ break;
+
+ case ZINITIX_CHIP_BT4X3:
+ bt541->icon_status_reg = ZINITIX_BT4X3_ICON_STATUS_REG;
+ break;
+
+ case ZINITIX_CHIP_BT4X4:
+ bt541->icon_status_reg = ZINITIX_BT4X4_ICON_STATUS_REG;
+ break;
+
+ default:
+ bt541->icon_status_reg = ZINITIX_BT5XX_ICON_STATUS_REG;
+ break;
+ }
+ }
+
error = zinitix_write_u16(client, ZINITIX_INT_ENABLE_FLAG, 0x0);
if (error) {
dev_err(&client->dev,
@@ -225,6 +299,11 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541)
if (error)
return error;
+ error = zinitix_write_u16(client, ZINITIX_BUTTON_SUPPORTED_NUM,
+ bt541->num_keycodes);
+ if (error)
+ return error;
+
error = zinitix_write_u16(client, ZINITIX_INITIAL_TOUCH_MODE,
bt541->zinitix_mode);
if (error)
@@ -235,9 +314,11 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541)
if (error)
return error;
- error = zinitix_write_u16(client, ZINITIX_INT_ENABLE_FLAG,
- BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE |
- BIT_UP);
+ int_flags = BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE | BIT_UP;
+ if (bt541->num_keycodes)
+ int_flags |= BIT_ICON_EVENT;
+
+ error = zinitix_write_u16(client, ZINITIX_INT_ENABLE_FLAG, int_flags);
if (error)
return error;
@@ -350,12 +431,22 @@ static void zinitix_report_finger(struct bt541_ts_data *bt541, int slot,
}
}
+static void zinitix_report_keys(struct bt541_ts_data *bt541, u16 icon_events)
+{
+ int i;
+
+ for (i = 0; i < bt541->num_keycodes; i++)
+ input_report_key(bt541->input_dev,
+ bt541->keycodes[i], icon_events & BIT(i));
+}
+
static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler)
{
struct bt541_ts_data *bt541 = bt541_handler;
struct i2c_client *client = bt541->client;
struct touch_event touch_event;
unsigned long finger_mask;
+ __le16 icon_events;
int error;
int i;
@@ -368,6 +459,17 @@ static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler)
goto out;
}
+ if (le16_to_cpu(touch_event.status) & BIT_ICON_EVENT) {
+ error = zinitix_read_data(bt541->client, bt541->icon_status_reg,
+ &icon_events, sizeof(icon_events));
+ if (error) {
+ dev_err(&client->dev, "Failed to read icon events\n");
+ goto out;
+ }
+
+ zinitix_report_keys(bt541, le16_to_cpu(icon_events));
+ }
+
finger_mask = touch_event.finger_mask;
for_each_set_bit(i, &finger_mask, MAX_SUPPORTED_FINGER_NUM) {
const struct point_coord *p = &touch_event.point_coord[i];
@@ -453,6 +555,7 @@ static int zinitix_init_input_dev(struct bt541_ts_data *bt541)
{
struct input_dev *input_dev;
int error;
+ int i;
input_dev = devm_input_allocate_device(&bt541->client->dev);
if (!input_dev) {
@@ -470,6 +573,14 @@ static int zinitix_init_input_dev(struct bt541_ts_data *bt541)
input_dev->open = zinitix_input_open;
input_dev->close = zinitix_input_close;
+ if (bt541->num_keycodes) {
+ input_dev->keycode = bt541->keycodes;
+ input_dev->keycodemax = bt541->num_keycodes;
+ input_dev->keycodesize = sizeof(bt541->keycodes[0]);
+ for (i = 0; i < bt541->num_keycodes; i++)
+ input_set_capability(input_dev, EV_KEY, bt541->keycodes[i]);
+ }
+
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
@@ -534,6 +645,21 @@ static int zinitix_ts_probe(struct i2c_client *client)
return error;
}
+ bt541->num_keycodes = device_property_count_u32(&client->dev, "linux,keycodes");
+ if (bt541->num_keycodes > ARRAY_SIZE(bt541->keycodes)) {
+ dev_err(&client->dev, "too many keys defined (%d)\n", bt541->num_keycodes);
+ return -EINVAL;
+ }
+
+ error = device_property_read_u32_array(&client->dev, "linux,keycodes",
+ bt541->keycodes,
+ bt541->num_keycodes);
+ if (error) {
+ dev_err(&client->dev,
+ "Unable to parse \"linux,keycodes\" property: %d\n", error);
+ return error;
+ }
+
error = zinitix_init_input_dev(bt541);
if (error) {
dev_err(&client->dev,
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-21 04:33:31 +0300