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path: root/drivers/input/misc/iqs269a.c
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Diffstat (limited to 'drivers/input/misc/iqs269a.c')
-rw-r--r--drivers/input/misc/iqs269a.c335
1 files changed, 291 insertions, 44 deletions
diff --git a/drivers/input/misc/iqs269a.c b/drivers/input/misc/iqs269a.c
index 3c636c75e8a1..cd14ff9f57cf 100644
--- a/drivers/input/misc/iqs269a.c
+++ b/drivers/input/misc/iqs269a.c
@@ -9,6 +9,7 @@
* axial sliders presented by the device.
*/
+#include <linux/bits.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/device.h>
@@ -26,6 +27,8 @@
#define IQS269_VER_INFO 0x00
#define IQS269_VER_INFO_PROD_NUM 0x4F
+#define IQS269_VER_INFO_FW_NUM_2 0x03
+#define IQS269_VER_INFO_FW_NUM_3 0x10
#define IQS269_SYS_FLAGS 0x02
#define IQS269_SYS_FLAGS_SHOW_RESET BIT(15)
@@ -53,6 +56,7 @@
#define IQS269_SYS_SETTINGS_ULP_UPDATE_MASK GENMASK(10, 8)
#define IQS269_SYS_SETTINGS_ULP_UPDATE_SHIFT 8
#define IQS269_SYS_SETTINGS_ULP_UPDATE_MAX 7
+#define IQS269_SYS_SETTINGS_SLIDER_SWIPE BIT(7)
#define IQS269_SYS_SETTINGS_RESEED_OFFSET BIT(6)
#define IQS269_SYS_SETTINGS_EVENT_MODE BIT(5)
#define IQS269_SYS_SETTINGS_EVENT_MODE_LP BIT(4)
@@ -69,6 +73,7 @@
#define IQS269_FILT_STR_MAX 3
#define IQS269_EVENT_MASK_SYS BIT(6)
+#define IQS269_EVENT_MASK_GESTURE BIT(3)
#define IQS269_EVENT_MASK_DEEP BIT(2)
#define IQS269_EVENT_MASK_TOUCH BIT(1)
#define IQS269_EVENT_MASK_PROX BIT(0)
@@ -97,6 +102,15 @@
#define IQS269_MISC_B_TRACKING_UI_ENABLE BIT(4)
#define IQS269_MISC_B_FILT_STR_SLIDER GENMASK(1, 0)
+#define IQS269_TOUCH_HOLD_SLIDER_SEL 0x89
+#define IQS269_TOUCH_HOLD_DEFAULT 0x14
+#define IQS269_TOUCH_HOLD_MS_MIN 256
+#define IQS269_TOUCH_HOLD_MS_MAX 65280
+
+#define IQS269_TIMEOUT_TAP_MS_MAX 4080
+#define IQS269_TIMEOUT_SWIPE_MS_MAX 4080
+#define IQS269_THRESH_SWIPE_MAX 255
+
#define IQS269_CHx_ENG_A_MEAS_CAP_SIZE BIT(15)
#define IQS269_CHx_ENG_A_RX_GND_INACTIVE BIT(13)
#define IQS269_CHx_ENG_A_LOCAL_CAP_SIZE BIT(12)
@@ -142,6 +156,10 @@
#define IQS269_MAX_REG 0xFF
+#define IQS269_OTP_OPTION_DEFAULT 0x00
+#define IQS269_OTP_OPTION_TWS 0xD0
+#define IQS269_OTP_OPTION_HOLD BIT(7)
+
#define IQS269_NUM_CH 8
#define IQS269_NUM_SL 2
@@ -175,6 +193,20 @@ enum iqs269_event_id {
IQS269_EVENT_DEEP_UP,
};
+enum iqs269_slider_id {
+ IQS269_SLIDER_NONE,
+ IQS269_SLIDER_KEY,
+ IQS269_SLIDER_RAW,
+};
+
+enum iqs269_gesture_id {
+ IQS269_GESTURE_TAP,
+ IQS269_GESTURE_HOLD,
+ IQS269_GESTURE_FLICK_POS,
+ IQS269_GESTURE_FLICK_NEG,
+ IQS269_NUM_GESTURES,
+};
+
struct iqs269_switch_desc {
unsigned int code;
bool enabled;
@@ -234,7 +266,7 @@ struct iqs269_ver_info {
u8 prod_num;
u8 sw_num;
u8 hw_num;
- u8 padding;
+ u8 fw_num;
} __packed;
struct iqs269_ch_reg {
@@ -285,16 +317,42 @@ struct iqs269_private {
struct regmap *regmap;
struct mutex lock;
struct iqs269_switch_desc switches[ARRAY_SIZE(iqs269_events)];
+ struct iqs269_ver_info ver_info;
struct iqs269_sys_reg sys_reg;
struct completion ati_done;
struct input_dev *keypad;
struct input_dev *slider[IQS269_NUM_SL];
unsigned int keycode[ARRAY_SIZE(iqs269_events) * IQS269_NUM_CH];
+ unsigned int sl_code[IQS269_NUM_SL][IQS269_NUM_GESTURES];
+ unsigned int otp_option;
unsigned int ch_num;
bool hall_enable;
bool ati_current;
};
+static enum iqs269_slider_id iqs269_slider_type(struct iqs269_private *iqs269,
+ int slider_num)
+{
+ int i;
+
+ /*
+ * Slider 1 is unavailable if the touch-and-hold option is enabled via
+ * OTP. In that case, the channel selection register is repurposed for
+ * the touch-and-hold timer ceiling.
+ */
+ if (slider_num && (iqs269->otp_option & IQS269_OTP_OPTION_HOLD))
+ return IQS269_SLIDER_NONE;
+
+ if (!iqs269->sys_reg.slider_select[slider_num])
+ return IQS269_SLIDER_NONE;
+
+ for (i = 0; i < IQS269_NUM_GESTURES; i++)
+ if (iqs269->sl_code[slider_num][i] != KEY_RESERVED)
+ return IQS269_SLIDER_KEY;
+
+ return IQS269_SLIDER_RAW;
+}
+
static int iqs269_ati_mode_set(struct iqs269_private *iqs269,
unsigned int ch_num, unsigned int mode)
{
@@ -525,7 +583,8 @@ static int iqs269_parse_chan(struct iqs269_private *iqs269,
if (fwnode_property_present(ch_node, "azoteq,slider0-select"))
iqs269->sys_reg.slider_select[0] |= BIT(reg);
- if (fwnode_property_present(ch_node, "azoteq,slider1-select"))
+ if (fwnode_property_present(ch_node, "azoteq,slider1-select") &&
+ !(iqs269->otp_option & IQS269_OTP_OPTION_HOLD))
iqs269->sys_reg.slider_select[1] |= BIT(reg);
ch_reg = &iqs269->sys_reg.ch_reg[reg];
@@ -950,7 +1009,43 @@ static int iqs269_parse_prop(struct iqs269_private *iqs269)
sys_reg->blocking = 0;
sys_reg->slider_select[0] = 0;
- sys_reg->slider_select[1] = 0;
+
+ /*
+ * If configured via OTP to do so, the device asserts a pulse on the
+ * GPIO4 pin for approximately 60 ms once a selected channel is held
+ * in a state of touch for a configurable length of time.
+ *
+ * In that case, the register used for slider 1 channel selection is
+ * repurposed for the touch-and-hold timer ceiling.
+ */
+ if (iqs269->otp_option & IQS269_OTP_OPTION_HOLD) {
+ if (!device_property_read_u32(&client->dev,
+ "azoteq,touch-hold-ms", &val)) {
+ if (val < IQS269_TOUCH_HOLD_MS_MIN ||
+ val > IQS269_TOUCH_HOLD_MS_MAX) {
+ dev_err(&client->dev,
+ "Invalid touch-and-hold ceiling: %u\n",
+ val);
+ return -EINVAL;
+ }
+
+ sys_reg->slider_select[1] = val / 256;
+ } else if (iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3) {
+ /*
+ * The default touch-and-hold timer ceiling initially
+ * read from early revisions of silicon is invalid if
+ * the device experienced a soft reset between power-
+ * on and the read operation.
+ *
+ * To protect against this case, explicitly cache the
+ * default value so that it is restored each time the
+ * device is re-initialized.
+ */
+ sys_reg->slider_select[1] = IQS269_TOUCH_HOLD_DEFAULT;
+ }
+ } else {
+ sys_reg->slider_select[1] = 0;
+ }
sys_reg->event_mask = ~((u8)IQS269_EVENT_MASK_SYS);
@@ -1004,6 +1099,76 @@ static int iqs269_parse_prop(struct iqs269_private *iqs269)
general |= (val << IQS269_SYS_SETTINGS_ULP_UPDATE_SHIFT);
}
+ if (device_property_present(&client->dev, "linux,keycodes")) {
+ int scale = 1;
+ int count = device_property_count_u32(&client->dev,
+ "linux,keycodes");
+ if (count > IQS269_NUM_GESTURES * IQS269_NUM_SL) {
+ dev_err(&client->dev, "Too many keycodes present\n");
+ return -EINVAL;
+ } else if (count < 0) {
+ dev_err(&client->dev, "Failed to count keycodes: %d\n",
+ count);
+ return count;
+ }
+
+ error = device_property_read_u32_array(&client->dev,
+ "linux,keycodes",
+ *iqs269->sl_code, count);
+ if (error) {
+ dev_err(&client->dev, "Failed to read keycodes: %d\n",
+ error);
+ return error;
+ }
+
+ if (device_property_present(&client->dev,
+ "azoteq,gesture-swipe"))
+ general |= IQS269_SYS_SETTINGS_SLIDER_SWIPE;
+
+ /*
+ * Early revisions of silicon use a more granular step size for
+ * tap and swipe gesture timeouts; scale them appropriately.
+ */
+ if (iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3)
+ scale = 4;
+
+ if (!device_property_read_u32(&client->dev,
+ "azoteq,timeout-tap-ms", &val)) {
+ if (val > IQS269_TIMEOUT_TAP_MS_MAX / scale) {
+ dev_err(&client->dev, "Invalid timeout: %u\n",
+ val);
+ return -EINVAL;
+ }
+
+ sys_reg->timeout_tap = val / (16 / scale);
+ }
+
+ if (!device_property_read_u32(&client->dev,
+ "azoteq,timeout-swipe-ms",
+ &val)) {
+ if (val > IQS269_TIMEOUT_SWIPE_MS_MAX / scale) {
+ dev_err(&client->dev, "Invalid timeout: %u\n",
+ val);
+ return -EINVAL;
+ }
+
+ sys_reg->timeout_swipe = val / (16 / scale);
+ }
+
+ if (!device_property_read_u32(&client->dev,
+ "azoteq,thresh-swipe", &val)) {
+ if (val > IQS269_THRESH_SWIPE_MAX) {
+ dev_err(&client->dev, "Invalid threshold: %u\n",
+ val);
+ return -EINVAL;
+ }
+
+ sys_reg->thresh_swipe = val;
+ }
+
+ sys_reg->event_mask &= ~IQS269_EVENT_MASK_GESTURE;
+ }
+
general &= ~IQS269_SYS_SETTINGS_RESEED_OFFSET;
if (device_property_present(&client->dev, "azoteq,reseed-offset"))
general |= IQS269_SYS_SETTINGS_RESEED_OFFSET;
@@ -1012,10 +1177,11 @@ static int iqs269_parse_prop(struct iqs269_private *iqs269)
/*
* As per the datasheet, enable streaming during normal-power mode if
- * either slider is in use. In that case, the device returns to event
- * mode during low-power mode.
+ * raw coordinates will be read from either slider. In that case, the
+ * device returns to event mode during low-power mode.
*/
- if (sys_reg->slider_select[0] || sys_reg->slider_select[1])
+ if (iqs269_slider_type(iqs269, 0) == IQS269_SLIDER_RAW ||
+ iqs269_slider_type(iqs269, 1) == IQS269_SLIDER_RAW)
general |= IQS269_SYS_SETTINGS_EVENT_MODE_LP;
general |= IQS269_SYS_SETTINGS_REDO_ATI;
@@ -1026,12 +1192,30 @@ static int iqs269_parse_prop(struct iqs269_private *iqs269)
return 0;
}
+static const struct reg_sequence iqs269_tws_init[] = {
+ { IQS269_TOUCH_HOLD_SLIDER_SEL, IQS269_TOUCH_HOLD_DEFAULT },
+ { 0xF0, 0x580F },
+ { 0xF0, 0x59EF },
+};
+
static int iqs269_dev_init(struct iqs269_private *iqs269)
{
int error;
mutex_lock(&iqs269->lock);
+ /*
+ * Early revisions of silicon require the following workaround in order
+ * to restore any OTP-enabled functionality after a soft reset.
+ */
+ if (iqs269->otp_option == IQS269_OTP_OPTION_TWS &&
+ iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3) {
+ error = regmap_multi_reg_write(iqs269->regmap, iqs269_tws_init,
+ ARRAY_SIZE(iqs269_tws_init));
+ if (error)
+ goto err_mutex;
+ }
+
error = regmap_update_bits(iqs269->regmap, IQS269_HALL_UI,
IQS269_HALL_UI_ENABLE,
iqs269->hall_enable ? ~0 : 0);
@@ -1106,19 +1290,37 @@ static int iqs269_input_init(struct iqs269_private *iqs269)
}
for (i = 0; i < IQS269_NUM_SL; i++) {
- if (!iqs269->sys_reg.slider_select[i])
+ if (iqs269_slider_type(iqs269, i) == IQS269_SLIDER_NONE)
continue;
iqs269->slider[i] = devm_input_allocate_device(&client->dev);
if (!iqs269->slider[i])
return -ENOMEM;
+ iqs269->slider[i]->keycodemax = ARRAY_SIZE(iqs269->sl_code[i]);
+ iqs269->slider[i]->keycode = iqs269->sl_code[i];
+ iqs269->slider[i]->keycodesize = sizeof(**iqs269->sl_code);
+
iqs269->slider[i]->name = i ? "iqs269a_slider_1"
: "iqs269a_slider_0";
iqs269->slider[i]->id.bustype = BUS_I2C;
- input_set_capability(iqs269->slider[i], EV_KEY, BTN_TOUCH);
- input_set_abs_params(iqs269->slider[i], ABS_X, 0, 255, 0, 0);
+ for (j = 0; j < IQS269_NUM_GESTURES; j++)
+ if (iqs269->sl_code[i][j] != KEY_RESERVED)
+ input_set_capability(iqs269->slider[i], EV_KEY,
+ iqs269->sl_code[i][j]);
+
+ /*
+ * Present the slider as a narrow trackpad if one or more chan-
+ * nels have been selected to participate, but no gestures have
+ * been mapped to a keycode.
+ */
+ if (iqs269_slider_type(iqs269, i) == IQS269_SLIDER_RAW) {
+ input_set_capability(iqs269->slider[i],
+ EV_KEY, BTN_TOUCH);
+ input_set_abs_params(iqs269->slider[i],
+ ABS_X, 0, 255, 0, 0);
+ }
error = input_register_device(iqs269->slider[i]);
if (error) {
@@ -1167,28 +1369,62 @@ static int iqs269_report(struct iqs269_private *iqs269)
if (be16_to_cpu(flags.system) & IQS269_SYS_FLAGS_IN_ATI)
return 0;
- error = regmap_raw_read(iqs269->regmap, IQS269_SLIDER_X, slider_x,
- sizeof(slider_x));
- if (error) {
- dev_err(&client->dev, "Failed to read slider position: %d\n",
- error);
- return error;
+ if (iqs269_slider_type(iqs269, 0) == IQS269_SLIDER_RAW ||
+ iqs269_slider_type(iqs269, 1) == IQS269_SLIDER_RAW) {
+ error = regmap_raw_read(iqs269->regmap, IQS269_SLIDER_X,
+ slider_x, sizeof(slider_x));
+ if (error) {
+ dev_err(&client->dev,
+ "Failed to read slider position: %d\n", error);
+ return error;
+ }
}
for (i = 0; i < IQS269_NUM_SL; i++) {
- if (!iqs269->sys_reg.slider_select[i])
+ flags.gesture >>= (i * IQS269_NUM_GESTURES);
+
+ switch (iqs269_slider_type(iqs269, i)) {
+ case IQS269_SLIDER_NONE:
continue;
- /*
- * Report BTN_TOUCH if any channel that participates in the
- * slider is in a state of touch.
- */
- if (flags.states[IQS269_ST_OFFS_TOUCH] &
- iqs269->sys_reg.slider_select[i]) {
- input_report_key(iqs269->slider[i], BTN_TOUCH, 1);
- input_report_abs(iqs269->slider[i], ABS_X, slider_x[i]);
- } else {
- input_report_key(iqs269->slider[i], BTN_TOUCH, 0);
+ case IQS269_SLIDER_KEY:
+ for (j = 0; j < IQS269_NUM_GESTURES; j++)
+ input_report_key(iqs269->slider[i],
+ iqs269->sl_code[i][j],
+ flags.gesture & BIT(j));
+
+ if (!(flags.gesture & (BIT(IQS269_GESTURE_FLICK_NEG) |
+ BIT(IQS269_GESTURE_FLICK_POS) |
+ BIT(IQS269_GESTURE_TAP))))
+ break;
+
+ input_sync(iqs269->slider[i]);
+
+ /*
+ * Momentary gestures are followed by a complementary
+ * release cycle so as to emulate a full keystroke.
+ */
+ for (j = 0; j < IQS269_NUM_GESTURES; j++)
+ if (j != IQS269_GESTURE_HOLD)
+ input_report_key(iqs269->slider[i],
+ iqs269->sl_code[i][j],
+ 0);
+ break;
+
+ case IQS269_SLIDER_RAW:
+ /*
+ * The slider is considered to be in a state of touch
+ * if any selected channels are in a state of touch.
+ */
+ state = flags.states[IQS269_ST_OFFS_TOUCH];
+ state &= iqs269->sys_reg.slider_select[i];
+
+ input_report_key(iqs269->slider[i], BTN_TOUCH, state);
+
+ if (state)
+ input_report_abs(iqs269->slider[i],
+ ABS_X, slider_x[i]);
+ break;
}
input_sync(iqs269->slider[i]);
@@ -1286,7 +1522,7 @@ static ssize_t counts_show(struct device *dev,
if (error)
return error;
- return scnprintf(buf, PAGE_SIZE, "%u\n", le16_to_cpu(counts));
+ return sysfs_emit(buf, "%u\n", le16_to_cpu(counts));
}
static ssize_t hall_bin_show(struct device *dev,
@@ -1324,7 +1560,7 @@ static ssize_t hall_bin_show(struct device *dev,
return -EINVAL;
}
- return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static ssize_t hall_enable_show(struct device *dev,
@@ -1332,7 +1568,7 @@ static ssize_t hall_enable_show(struct device *dev,
{
struct iqs269_private *iqs269 = dev_get_drvdata(dev);
- return scnprintf(buf, PAGE_SIZE, "%u\n", iqs269->hall_enable);
+ return sysfs_emit(buf, "%u\n", iqs269->hall_enable);
}
static ssize_t hall_enable_store(struct device *dev,
@@ -1362,7 +1598,7 @@ static ssize_t ch_number_show(struct device *dev,
{
struct iqs269_private *iqs269 = dev_get_drvdata(dev);
- return scnprintf(buf, PAGE_SIZE, "%u\n", iqs269->ch_num);
+ return sysfs_emit(buf, "%u\n", iqs269->ch_num);
}
static ssize_t ch_number_store(struct device *dev,
@@ -1391,8 +1627,7 @@ static ssize_t rx_enable_show(struct device *dev,
struct iqs269_private *iqs269 = dev_get_drvdata(dev);
struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg;
- return scnprintf(buf, PAGE_SIZE, "%u\n",
- ch_reg[iqs269->ch_num].rx_enable);
+ return sysfs_emit(buf, "%u\n", ch_reg[iqs269->ch_num].rx_enable);
}
static ssize_t rx_enable_store(struct device *dev,
@@ -1432,7 +1667,7 @@ static ssize_t ati_mode_show(struct device *dev,
if (error)
return error;
- return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static ssize_t ati_mode_store(struct device *dev,
@@ -1465,7 +1700,7 @@ static ssize_t ati_base_show(struct device *dev,
if (error)
return error;
- return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static ssize_t ati_base_store(struct device *dev,
@@ -1498,7 +1733,7 @@ static ssize_t ati_target_show(struct device *dev,
if (error)
return error;
- return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static ssize_t ati_target_store(struct device *dev,
@@ -1525,9 +1760,9 @@ static ssize_t ati_trigger_show(struct device *dev,
{
struct iqs269_private *iqs269 = dev_get_drvdata(dev);
- return scnprintf(buf, PAGE_SIZE, "%u\n",
- iqs269->ati_current &&
- completion_done(&iqs269->ati_done));
+ return sysfs_emit(buf, "%u\n",
+ iqs269->ati_current &&
+ completion_done(&iqs269->ati_done));
}
static ssize_t ati_trigger_store(struct device *dev,
@@ -1596,7 +1831,6 @@ static const struct regmap_config iqs269_regmap_config = {
static int iqs269_probe(struct i2c_client *client)
{
- struct iqs269_ver_info ver_info;
struct iqs269_private *iqs269;
int error;
@@ -1618,14 +1852,16 @@ static int iqs269_probe(struct i2c_client *client)
mutex_init(&iqs269->lock);
init_completion(&iqs269->ati_done);
- error = regmap_raw_read(iqs269->regmap, IQS269_VER_INFO, &ver_info,
- sizeof(ver_info));
+ iqs269->otp_option = (uintptr_t)device_get_match_data(&client->dev);
+
+ error = regmap_raw_read(iqs269->regmap, IQS269_VER_INFO,
+ &iqs269->ver_info, sizeof(iqs269->ver_info));
if (error)
return error;
- if (ver_info.prod_num != IQS269_VER_INFO_PROD_NUM) {
+ if (iqs269->ver_info.prod_num != IQS269_VER_INFO_PROD_NUM) {
dev_err(&client->dev, "Unrecognized product number: 0x%02X\n",
- ver_info.prod_num);
+ iqs269->ver_info.prod_num);
return -EINVAL;
}
@@ -1728,7 +1964,18 @@ static int iqs269_resume(struct device *dev)
static DEFINE_SIMPLE_DEV_PM_OPS(iqs269_pm, iqs269_suspend, iqs269_resume);
static const struct of_device_id iqs269_of_match[] = {
- { .compatible = "azoteq,iqs269a" },
+ {
+ .compatible = "azoteq,iqs269a",
+ .data = (void *)IQS269_OTP_OPTION_DEFAULT,
+ },
+ {
+ .compatible = "azoteq,iqs269a-00",
+ .data = (void *)IQS269_OTP_OPTION_DEFAULT,
+ },
+ {
+ .compatible = "azoteq,iqs269a-d0",
+ .data = (void *)IQS269_OTP_OPTION_TWS,
+ },
{ }
};
MODULE_DEVICE_TABLE(of, iqs269_of_match);