// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * Azoteq IQS7222A/B/C Capacitive Touch Controller
+ * Azoteq IQS7222A/B/C/D Capacitive Touch Controller
*
* Copyright (C) 2022 Jeff LaBundy <jeff@labundy.com>
*/
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
+#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/ktime.h>
#define IQS7222_PROD_NUM_A 840
#define IQS7222_PROD_NUM_B 698
#define IQS7222_PROD_NUM_C 863
+#define IQS7222_PROD_NUM_D 1046
#define IQS7222_SYS_STATUS 0x10
#define IQS7222_SYS_STATUS_RESET BIT(3)
#define IQS7222_EVENT_MASK_ATI BIT(12)
#define IQS7222_EVENT_MASK_SLDR BIT(10)
+#define IQS7222_EVENT_MASK_TPAD IQS7222_EVENT_MASK_SLDR
#define IQS7222_EVENT_MASK_TOUCH BIT(1)
#define IQS7222_EVENT_MASK_PROX BIT(0)
#define IQS7222_MAX_COLS_CHAN 6
#define IQS7222_MAX_COLS_FILT 2
#define IQS7222_MAX_COLS_SLDR 11
+#define IQS7222_MAX_COLS_TPAD 24
#define IQS7222_MAX_COLS_GPIO 3
#define IQS7222_MAX_COLS_SYS 13
IQS7222_REG_GRP_BTN,
IQS7222_REG_GRP_CHAN,
IQS7222_REG_GRP_SLDR,
+ IQS7222_REG_GRP_TPAD,
IQS7222_REG_GRP_GPIO,
IQS7222_REG_GRP_SYS,
IQS7222_NUM_REG_GRPS
};
static const char * const iqs7222_reg_grp_names[IQS7222_NUM_REG_GRPS] = {
- [IQS7222_REG_GRP_CYCLE] = "cycle",
- [IQS7222_REG_GRP_CHAN] = "channel",
- [IQS7222_REG_GRP_SLDR] = "slider",
- [IQS7222_REG_GRP_GPIO] = "gpio",
+ [IQS7222_REG_GRP_CYCLE] = "cycle-%d",
+ [IQS7222_REG_GRP_CHAN] = "channel-%d",
+ [IQS7222_REG_GRP_SLDR] = "slider-%d",
+ [IQS7222_REG_GRP_TPAD] = "trackpad",
+ [IQS7222_REG_GRP_GPIO] = "gpio-%d",
};
static const unsigned int iqs7222_max_cols[IQS7222_NUM_REG_GRPS] = {
[IQS7222_REG_GRP_CHAN] = IQS7222_MAX_COLS_CHAN,
[IQS7222_REG_GRP_FILT] = IQS7222_MAX_COLS_FILT,
[IQS7222_REG_GRP_SLDR] = IQS7222_MAX_COLS_SLDR,
+ [IQS7222_REG_GRP_TPAD] = IQS7222_MAX_COLS_TPAD,
[IQS7222_REG_GRP_GPIO] = IQS7222_MAX_COLS_GPIO,
[IQS7222_REG_GRP_SYS] = IQS7222_MAX_COLS_SYS,
};
struct iqs7222_event_desc {
const char *name;
+ u16 link;
u16 mask;
u16 val;
+ u16 strict;
u16 enable;
enum iqs7222_reg_key_id reg_key;
};
},
};
+static const struct iqs7222_event_desc iqs7222_tp_events[] = {
+ {
+ .name = "event-press",
+ .link = BIT(7),
+ },
+ {
+ .name = "event-tap",
+ .link = BIT(0),
+ .mask = BIT(0),
+ .val = BIT(0),
+ .enable = BIT(0),
+ .reg_key = IQS7222_REG_KEY_TAP,
+ },
+ {
+ .name = "event-swipe-x-pos",
+ .link = BIT(2),
+ .mask = BIT(2) | BIT(1),
+ .val = BIT(2),
+ .strict = BIT(4),
+ .enable = BIT(1),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+ {
+ .name = "event-swipe-y-pos",
+ .link = BIT(3),
+ .mask = BIT(3) | BIT(1),
+ .val = BIT(3),
+ .strict = BIT(3),
+ .enable = BIT(1),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+ {
+ .name = "event-swipe-x-neg",
+ .link = BIT(4),
+ .mask = BIT(4) | BIT(1),
+ .val = BIT(4),
+ .strict = BIT(4),
+ .enable = BIT(1),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+ {
+ .name = "event-swipe-y-neg",
+ .link = BIT(5),
+ .mask = BIT(5) | BIT(1),
+ .val = BIT(5),
+ .strict = BIT(3),
+ .enable = BIT(1),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+ {
+ .name = "event-flick-x-pos",
+ .link = BIT(2),
+ .mask = BIT(2) | BIT(1),
+ .val = BIT(2) | BIT(1),
+ .strict = BIT(4),
+ .enable = BIT(2),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+ {
+ .name = "event-flick-y-pos",
+ .link = BIT(3),
+ .mask = BIT(3) | BIT(1),
+ .val = BIT(3) | BIT(1),
+ .strict = BIT(3),
+ .enable = BIT(2),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+ {
+ .name = "event-flick-x-neg",
+ .link = BIT(4),
+ .mask = BIT(4) | BIT(1),
+ .val = BIT(4) | BIT(1),
+ .strict = BIT(4),
+ .enable = BIT(2),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+ {
+ .name = "event-flick-y-neg",
+ .link = BIT(5),
+ .mask = BIT(5) | BIT(1),
+ .val = BIT(5) | BIT(1),
+ .strict = BIT(3),
+ .enable = BIT(2),
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ },
+};
+
struct iqs7222_reg_grp_desc {
u16 base;
int num_row;
},
},
},
+ {
+ .prod_num = IQS7222_PROD_NUM_D,
+ .fw_major = 0,
+ .fw_minor = 37,
+ .touch_link = 1770,
+ .allow_offset = 9,
+ .event_offset = 10,
+ .comms_offset = 11,
+ .reg_grps = {
+ [IQS7222_REG_GRP_STAT] = {
+ .base = IQS7222_SYS_STATUS,
+ .num_row = 1,
+ .num_col = 7,
+ },
+ [IQS7222_REG_GRP_CYCLE] = {
+ .base = 0x8000,
+ .num_row = 7,
+ .num_col = 2,
+ },
+ [IQS7222_REG_GRP_GLBL] = {
+ .base = 0x8700,
+ .num_row = 1,
+ .num_col = 3,
+ },
+ [IQS7222_REG_GRP_BTN] = {
+ .base = 0x9000,
+ .num_row = 14,
+ .num_col = 3,
+ },
+ [IQS7222_REG_GRP_CHAN] = {
+ .base = 0xA000,
+ .num_row = 14,
+ .num_col = 4,
+ },
+ [IQS7222_REG_GRP_FILT] = {
+ .base = 0xAE00,
+ .num_row = 1,
+ .num_col = 2,
+ },
+ [IQS7222_REG_GRP_TPAD] = {
+ .base = 0xB000,
+ .num_row = 1,
+ .num_col = 24,
+ },
+ [IQS7222_REG_GRP_GPIO] = {
+ .base = 0xC000,
+ .num_row = 3,
+ .num_col = 3,
+ },
+ [IQS7222_REG_GRP_SYS] = {
+ .base = IQS7222_SYS_SETUP,
+ .num_row = 1,
+ .num_col = 12,
+ },
+ },
+ },
};
struct iqs7222_prop_desc {
.val_pitch = 4,
.label = "maximum gesture time",
},
+ {
+ .name = "azoteq,num-rows",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 0,
+ .reg_shift = 4,
+ .reg_width = 4,
+ .val_min = 1,
+ .val_max = 12,
+ .label = "number of rows",
+ },
+ {
+ .name = "azoteq,num-cols",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 0,
+ .reg_shift = 0,
+ .reg_width = 4,
+ .val_min = 1,
+ .val_max = 12,
+ .label = "number of columns",
+ },
+ {
+ .name = "azoteq,lower-cal-y",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 1,
+ .reg_shift = 8,
+ .reg_width = 8,
+ .label = "lower vertical calibration",
+ },
+ {
+ .name = "azoteq,lower-cal-x",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 1,
+ .reg_shift = 0,
+ .reg_width = 8,
+ .label = "lower horizontal calibration",
+ },
+ {
+ .name = "azoteq,upper-cal-y",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 2,
+ .reg_shift = 8,
+ .reg_width = 8,
+ .label = "upper vertical calibration",
+ },
+ {
+ .name = "azoteq,upper-cal-x",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 2,
+ .reg_shift = 0,
+ .reg_width = 8,
+ .label = "upper horizontal calibration",
+ },
+ {
+ .name = "azoteq,top-speed",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 3,
+ .reg_shift = 8,
+ .reg_width = 8,
+ .val_pitch = 4,
+ .label = "top speed",
+ },
+ {
+ .name = "azoteq,bottom-speed",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_offset = 3,
+ .reg_shift = 0,
+ .reg_width = 8,
+ .label = "bottom speed",
+ },
+ {
+ .name = "azoteq,gesture-min-ms",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_key = IQS7222_REG_KEY_TAP,
+ .reg_offset = 20,
+ .reg_shift = 8,
+ .reg_width = 8,
+ .val_pitch = 16,
+ .label = "minimum gesture time",
+ },
+ {
+ .name = "azoteq,gesture-max-ms",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ .reg_offset = 21,
+ .reg_shift = 8,
+ .reg_width = 8,
+ .val_pitch = 16,
+ .label = "maximum gesture time",
+ },
+ {
+ .name = "azoteq,gesture-max-ms",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_key = IQS7222_REG_KEY_TAP,
+ .reg_offset = 21,
+ .reg_shift = 0,
+ .reg_width = 8,
+ .val_pitch = 16,
+ .label = "maximum gesture time",
+ },
+ {
+ .name = "azoteq,gesture-dist",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_key = IQS7222_REG_KEY_TAP,
+ .reg_offset = 22,
+ .reg_shift = 0,
+ .reg_width = 16,
+ .label = "gesture distance",
+ },
+ {
+ .name = "azoteq,gesture-dist",
+ .reg_grp = IQS7222_REG_GRP_TPAD,
+ .reg_key = IQS7222_REG_KEY_AXIAL,
+ .reg_offset = 23,
+ .reg_shift = 0,
+ .reg_width = 16,
+ .label = "gesture distance",
+ },
{
.name = "drive-open-drain",
.reg_grp = IQS7222_REG_GRP_GPIO,
struct gpio_desc *irq_gpio;
struct i2c_client *client;
struct input_dev *keypad;
+ struct touchscreen_properties prop;
unsigned int kp_type[IQS7222_MAX_CHAN][ARRAY_SIZE(iqs7222_kp_events)];
unsigned int kp_code[IQS7222_MAX_CHAN][ARRAY_SIZE(iqs7222_kp_events)];
unsigned int sl_code[IQS7222_MAX_SLDR][ARRAY_SIZE(iqs7222_sl_events)];
unsigned int sl_axis[IQS7222_MAX_SLDR];
+ unsigned int tp_code[ARRAY_SIZE(iqs7222_tp_events)];
u16 cycle_setup[IQS7222_MAX_CHAN / 2][IQS7222_MAX_COLS_CYCLE];
u16 glbl_setup[IQS7222_MAX_COLS_GLBL];
u16 btn_setup[IQS7222_MAX_CHAN][IQS7222_MAX_COLS_BTN];
u16 chan_setup[IQS7222_MAX_CHAN][IQS7222_MAX_COLS_CHAN];
u16 filt_setup[IQS7222_MAX_COLS_FILT];
u16 sldr_setup[IQS7222_MAX_SLDR][IQS7222_MAX_COLS_SLDR];
+ u16 tpad_setup[IQS7222_MAX_COLS_TPAD];
u16 gpio_setup[ARRAY_SIZE(iqs7222_gpio_links)][IQS7222_MAX_COLS_GPIO];
u16 sys_setup[IQS7222_MAX_COLS_SYS];
};
case IQS7222_REG_GRP_SLDR:
return iqs7222->sldr_setup[row];
+ case IQS7222_REG_GRP_TPAD:
+ return iqs7222->tpad_setup;
+
case IQS7222_REG_GRP_GPIO:
return iqs7222->gpio_setup[row];
ref_setup[4] = dev_desc->touch_link;
if (fwnode_property_present(chan_node, "azoteq,use-prox"))
ref_setup[4] -= 2;
+ } else if (dev_desc->reg_grps[IQS7222_REG_GRP_TPAD].num_row &&
+ fwnode_property_present(chan_node,
+ "azoteq,counts-filt-enable")) {
+ /*
+ * In the case of IQS7222D, however, the reference mode field
+ * is partially repurposed as a counts filter enable control.
+ */
+ chan_setup[0] |= IQS7222_CHAN_SETUP_0_REF_MODE_REF;
}
if (fwnode_property_present(chan_node, "azoteq,rx-enable")) {
IQS7222_REG_KEY_NO_WHEEL);
}
+static int iqs7222_parse_tpad(struct iqs7222_private *iqs7222,
+ struct fwnode_handle *tpad_node, int tpad_index)
+{
+ const struct iqs7222_dev_desc *dev_desc = iqs7222->dev_desc;
+ struct touchscreen_properties *prop = &iqs7222->prop;
+ struct i2c_client *client = iqs7222->client;
+ int num_chan = dev_desc->reg_grps[IQS7222_REG_GRP_CHAN].num_row;
+ int count, error, i;
+ u16 *event_mask = &iqs7222->sys_setup[dev_desc->event_offset];
+ u16 *tpad_setup = iqs7222->tpad_setup;
+ unsigned int chan_sel[12];
+
+ error = iqs7222_parse_props(iqs7222, tpad_node, tpad_index,
+ IQS7222_REG_GRP_TPAD,
+ IQS7222_REG_KEY_NONE);
+ if (error)
+ return error;
+
+ count = fwnode_property_count_u32(tpad_node, "azoteq,channel-select");
+ if (count < 0) {
+ dev_err(&client->dev, "Failed to count %s channels: %d\n",
+ fwnode_get_name(tpad_node), count);
+ return count;
+ } else if (!count || count > ARRAY_SIZE(chan_sel)) {
+ dev_err(&client->dev, "Invalid number of %s channels\n",
+ fwnode_get_name(tpad_node));
+ return -EINVAL;
+ }
+
+ error = fwnode_property_read_u32_array(tpad_node,
+ "azoteq,channel-select",
+ chan_sel, count);
+ if (error) {
+ dev_err(&client->dev, "Failed to read %s channels: %d\n",
+ fwnode_get_name(tpad_node), error);
+ return error;
+ }
+
+ tpad_setup[6] &= ~GENMASK(num_chan - 1, 0);
+
+ for (i = 0; i < ARRAY_SIZE(chan_sel); i++) {
+ tpad_setup[8 + i] = 0;
+ if (i >= count || chan_sel[i] == U8_MAX)
+ continue;
+
+ if (chan_sel[i] >= num_chan) {
+ dev_err(&client->dev, "Invalid %s channel: %u\n",
+ fwnode_get_name(tpad_node), chan_sel[i]);
+ return -EINVAL;
+ }
+
+ /*
+ * The following fields indicate which channels participate in
+ * the trackpad, as well as each channel's relative placement.
+ */
+ tpad_setup[6] |= BIT(chan_sel[i]);
+ tpad_setup[8 + i] = chan_sel[i] * 34 + 1072;
+ }
+
+ tpad_setup[7] = dev_desc->touch_link;
+ if (fwnode_property_present(tpad_node, "azoteq,use-prox"))
+ tpad_setup[7] -= 2;
+
+ for (i = 0; i < ARRAY_SIZE(iqs7222_tp_events); i++)
+ tpad_setup[20] &= ~(iqs7222_tp_events[i].strict |
+ iqs7222_tp_events[i].enable);
+
+ for (i = 0; i < ARRAY_SIZE(iqs7222_tp_events); i++) {
+ const char *event_name = iqs7222_tp_events[i].name;
+ struct fwnode_handle *event_node;
+
+ event_node = fwnode_get_named_child_node(tpad_node, event_name);
+ if (!event_node)
+ continue;
+
+ if (fwnode_property_present(event_node,
+ "azoteq,gesture-angle-tighten"))
+ tpad_setup[20] |= iqs7222_tp_events[i].strict;
+
+ tpad_setup[20] |= iqs7222_tp_events[i].enable;
+
+ error = iqs7222_parse_event(iqs7222, event_node, tpad_index,
+ IQS7222_REG_GRP_TPAD,
+ iqs7222_tp_events[i].reg_key,
+ iqs7222_tp_events[i].link, 1566,
+ NULL,
+ &iqs7222->tp_code[i]);
+ fwnode_handle_put(event_node);
+ if (error)
+ return error;
+
+ if (!dev_desc->event_offset)
+ continue;
+
+ /*
+ * The press/release event is determined based on whether the
+ * coordinate fields report 0xFFFF and solely relies on touch
+ * or proximity interrupts to be unmasked.
+ */
+ if (i)
+ *event_mask |= IQS7222_EVENT_MASK_TPAD;
+ else if (tpad_setup[7] == dev_desc->touch_link)
+ *event_mask |= IQS7222_EVENT_MASK_TOUCH;
+ else
+ *event_mask |= IQS7222_EVENT_MASK_PROX;
+ }
+
+ if (!iqs7222->tp_code[0])
+ return 0;
+
+ input_set_abs_params(iqs7222->keypad, ABS_X,
+ 0, (tpad_setup[4] ? : 1) - 1, 0, 0);
+
+ input_set_abs_params(iqs7222->keypad, ABS_Y,
+ 0, (tpad_setup[5] ? : 1) - 1, 0, 0);
+
+ touchscreen_parse_properties(iqs7222->keypad, false, prop);
+
+ if (prop->max_x >= U16_MAX || prop->max_y >= U16_MAX) {
+ dev_err(&client->dev, "Invalid trackpad size: %u*%u\n",
+ prop->max_x, prop->max_y);
+ return -EINVAL;
+ }
+
+ tpad_setup[4] = prop->max_x + 1;
+ tpad_setup[5] = prop->max_y + 1;
+
+ return 0;
+}
+
static int (*iqs7222_parse_extra[IQS7222_NUM_REG_GRPS])
(struct iqs7222_private *iqs7222,
struct fwnode_handle *reg_grp_node,
[IQS7222_REG_GRP_CYCLE] = iqs7222_parse_cycle,
[IQS7222_REG_GRP_CHAN] = iqs7222_parse_chan,
[IQS7222_REG_GRP_SLDR] = iqs7222_parse_sldr,
+ [IQS7222_REG_GRP_TPAD] = iqs7222_parse_tpad,
};
static int iqs7222_parse_reg_grp(struct iqs7222_private *iqs7222,
if (iqs7222_reg_grp_names[reg_grp]) {
char reg_grp_name[16];
- snprintf(reg_grp_name, sizeof(reg_grp_name), "%s-%d",
+ snprintf(reg_grp_name, sizeof(reg_grp_name),
iqs7222_reg_grp_names[reg_grp], reg_grp_index);
reg_grp_node = device_get_named_child_node(&client->dev,
continue;
/*
- * The IQS7222C exposes multiple GPIO and must be informed
- * as to which GPIO this group represents.
+ * The IQS7222C and IQS7222D expose multiple GPIO and must be
+ * informed as to which GPIO this group represents.
*/
for (j = 0; j < ARRAY_SIZE(iqs7222_gpio_links); j++)
gpio_setup[0] &= ~BIT(iqs7222_gpio_links[j]);
iqs7222->sl_code[i][j], 0);
}
+ for (i = 0; i < dev_desc->reg_grps[IQS7222_REG_GRP_TPAD].num_row; i++) {
+ u16 tpad_pos_x = le16_to_cpu(status[4]);
+ u16 tpad_pos_y = le16_to_cpu(status[5]);
+ u16 state = le16_to_cpu(status[6]);
+
+ input_report_key(iqs7222->keypad, iqs7222->tp_code[0],
+ tpad_pos_x < U16_MAX);
+
+ if (tpad_pos_x < U16_MAX)
+ touchscreen_report_pos(iqs7222->keypad, &iqs7222->prop,
+ tpad_pos_x, tpad_pos_y, false);
+
+ if (!(le16_to_cpu(status[1]) & IQS7222_EVENT_MASK_TPAD))
+ continue;
+
+ /*
+ * Skip the press/release event, as it does not have separate
+ * status fields and is handled separately.
+ */
+ for (j = 1; j < ARRAY_SIZE(iqs7222_tp_events); j++) {
+ u16 mask = iqs7222_tp_events[j].mask;
+ u16 val = iqs7222_tp_events[j].val;
+
+ input_report_key(iqs7222->keypad,
+ iqs7222->tp_code[j],
+ (state & mask) == val);
+ }
+
+ input_sync(iqs7222->keypad);
+
+ for (j = 1; j < ARRAY_SIZE(iqs7222_tp_events); j++)
+ input_report_key(iqs7222->keypad,
+ iqs7222->tp_code[j], 0);
+ }
+
input_sync(iqs7222->keypad);
return 0;
{ .compatible = "azoteq,iqs7222a" },
{ .compatible = "azoteq,iqs7222b" },
{ .compatible = "azoteq,iqs7222c" },
+ { .compatible = "azoteq,iqs7222d" },
{ }
};
MODULE_DEVICE_TABLE(of, iqs7222_of_match);
module_i2c_driver(iqs7222_i2c_driver);
MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
-MODULE_DESCRIPTION("Azoteq IQS7222A/B/C Capacitive Touch Controller");
+MODULE_DESCRIPTION("Azoteq IQS7222A/B/C/D Capacitive Touch Controller");
MODULE_LICENSE("GPL");
projects / platform / kernel / linux-starfive.git / commitdiff