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path: root/drivers/input/touchscreen/imagis.c
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Diffstat (limited to 'drivers/input/touchscreen/imagis.c')
-rw-r--r--drivers/input/touchscreen/imagis.c98
1 files changed, 86 insertions, 12 deletions
diff --git a/drivers/input/touchscreen/imagis.c b/drivers/input/touchscreen/imagis.c
index 55ecebe981..074dd6c342 100644
--- a/drivers/input/touchscreen/imagis.c
+++ b/drivers/input/touchscreen/imagis.c
@@ -12,9 +12,15 @@
#include <linux/property.h>
#include <linux/regulator/consumer.h>
+#define IST3032C_WHOAMI 0x32c
+
+#define IST3038B_REG_STATUS 0x20
+#define IST3038B_REG_CHIPID 0x30
+#define IST3038B_WHOAMI 0x30380b
+
#define IST3038C_HIB_ACCESS (0x800B << 16)
#define IST3038C_DIRECT_ACCESS BIT(31)
-#define IST3038C_REG_CHIPID 0x40001000
+#define IST3038C_REG_CHIPID (0x40001000 | IST3038C_DIRECT_ACCESS)
#define IST3038C_REG_HIB_BASE 0x30000100
#define IST3038C_REG_TOUCH_STATUS (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS)
#define IST3038C_REG_TOUCH_COORD (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS | 0x8)
@@ -28,12 +34,25 @@
#define IST3038C_AREA_MASK GENMASK(27, 24)
#define IST3038C_FINGER_COUNT_MASK GENMASK(15, 12)
#define IST3038C_FINGER_STATUS_MASK GENMASK(9, 0)
+#define IST3032C_KEY_STATUS_MASK GENMASK(20, 16)
+
+struct imagis_properties {
+ unsigned int interrupt_msg_cmd;
+ unsigned int touch_coord_cmd;
+ unsigned int whoami_cmd;
+ unsigned int whoami_val;
+ bool protocol_b;
+ bool touch_keys_supported;
+};
struct imagis_ts {
struct i2c_client *client;
+ const struct imagis_properties *tdata;
struct input_dev *input_dev;
struct touchscreen_properties prop;
struct regulator_bulk_data supplies[2];
+ u32 keycodes[5];
+ int num_keycodes;
};
static int imagis_i2c_read_reg(struct imagis_ts *ts,
@@ -78,12 +97,11 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id)
{
struct imagis_ts *ts = dev_id;
u32 intr_message, finger_status;
- unsigned int finger_count, finger_pressed;
+ unsigned int finger_count, finger_pressed, key_pressed;
int i;
int error;
- error = imagis_i2c_read_reg(ts, IST3038C_REG_INTR_MESSAGE,
- &intr_message);
+ error = imagis_i2c_read_reg(ts, ts->tdata->interrupt_msg_cmd, &intr_message);
if (error) {
dev_err(&ts->client->dev,
"failed to read the interrupt message: %d\n", error);
@@ -101,9 +119,13 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id)
finger_pressed = FIELD_GET(IST3038C_FINGER_STATUS_MASK, intr_message);
for (i = 0; i < finger_count; i++) {
- error = imagis_i2c_read_reg(ts,
- IST3038C_REG_TOUCH_COORD + (i * 4),
- &finger_status);
+ if (ts->tdata->protocol_b)
+ error = imagis_i2c_read_reg(ts,
+ ts->tdata->touch_coord_cmd, &finger_status);
+ else
+ error = imagis_i2c_read_reg(ts,
+ ts->tdata->touch_coord_cmd + (i * 4),
+ &finger_status);
if (error) {
dev_err(&ts->client->dev,
"failed to read coordinates for finger %d: %d\n",
@@ -122,6 +144,12 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id)
FIELD_GET(IST3038C_AREA_MASK, finger_status));
}
+ key_pressed = FIELD_GET(IST3032C_KEY_STATUS_MASK, intr_message);
+
+ for (int i = 0; i < ts->num_keycodes; i++)
+ input_report_key(ts->input_dev, ts->keycodes[i],
+ key_pressed & BIT(i));
+
input_mt_sync_frame(ts->input_dev);
input_sync(ts->input_dev);
@@ -207,6 +235,23 @@ static int imagis_init_input_dev(struct imagis_ts *ts)
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_TOUCH_MAJOR, 0, 16, 0, 0);
+ if (ts->tdata->touch_keys_supported) {
+ ts->num_keycodes = of_property_read_variable_u32_array(
+ ts->client->dev.of_node, "linux,keycodes",
+ ts->keycodes, 0, ARRAY_SIZE(ts->keycodes));
+ if (ts->num_keycodes <= 0) {
+ ts->keycodes[0] = KEY_APPSELECT;
+ ts->keycodes[1] = KEY_BACK;
+ ts->num_keycodes = 2;
+ }
+
+ input_dev->keycodemax = ts->num_keycodes;
+ input_dev->keycodesize = sizeof(ts->keycodes[0]);
+ input_dev->keycode = ts->keycodes;
+ }
+
+ for (int i = 0; i < ts->num_keycodes; i++)
+ input_set_capability(input_dev, EV_KEY, ts->keycodes[i]);
touchscreen_parse_properties(input_dev, true, &ts->prop);
if (!ts->prop.max_x || !ts->prop.max_y) {
@@ -257,6 +302,12 @@ static int imagis_probe(struct i2c_client *i2c)
ts->client = i2c;
+ ts->tdata = device_get_match_data(dev);
+ if (!ts->tdata) {
+ dev_err(dev, "missing chip data\n");
+ return -EINVAL;
+ }
+
error = imagis_init_regulators(ts);
if (error) {
dev_err(dev, "regulator init error: %d\n", error);
@@ -275,15 +326,13 @@ static int imagis_probe(struct i2c_client *i2c)
return error;
}
- error = imagis_i2c_read_reg(ts,
- IST3038C_REG_CHIPID | IST3038C_DIRECT_ACCESS,
- &chip_id);
+ error = imagis_i2c_read_reg(ts, ts->tdata->whoami_cmd, &chip_id);
if (error) {
dev_err(dev, "chip ID read failure: %d\n", error);
return error;
}
- if (chip_id != IST3038C_WHOAMI) {
+ if (chip_id != ts->tdata->whoami_val) {
dev_err(dev, "unknown chip ID: 0x%x\n", chip_id);
return -EINVAL;
}
@@ -339,9 +388,34 @@ static int imagis_resume(struct device *dev)
static DEFINE_SIMPLE_DEV_PM_OPS(imagis_pm_ops, imagis_suspend, imagis_resume);
+static const struct imagis_properties imagis_3032c_data = {
+ .interrupt_msg_cmd = IST3038C_REG_INTR_MESSAGE,
+ .touch_coord_cmd = IST3038C_REG_TOUCH_COORD,
+ .whoami_cmd = IST3038C_REG_CHIPID,
+ .whoami_val = IST3032C_WHOAMI,
+ .touch_keys_supported = true,
+};
+
+static const struct imagis_properties imagis_3038b_data = {
+ .interrupt_msg_cmd = IST3038B_REG_STATUS,
+ .touch_coord_cmd = IST3038B_REG_STATUS,
+ .whoami_cmd = IST3038B_REG_CHIPID,
+ .whoami_val = IST3038B_WHOAMI,
+ .protocol_b = true,
+};
+
+static const struct imagis_properties imagis_3038c_data = {
+ .interrupt_msg_cmd = IST3038C_REG_INTR_MESSAGE,
+ .touch_coord_cmd = IST3038C_REG_TOUCH_COORD,
+ .whoami_cmd = IST3038C_REG_CHIPID,
+ .whoami_val = IST3038C_WHOAMI,
+};
+
#ifdef CONFIG_OF
static const struct of_device_id imagis_of_match[] = {
- { .compatible = "imagis,ist3038c", },
+ { .compatible = "imagis,ist3032c", .data = &imagis_3032c_data },
+ { .compatible = "imagis,ist3038b", .data = &imagis_3038b_data },
+ { .compatible = "imagis,ist3038c", .data = &imagis_3038c_data },
{ },
};
MODULE_DEVICE_TABLE(of, imagis_of_match);