^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Touchscreen driver for Dialog Semiconductor DA9034
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006-2008 Marvell International Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Fengwei Yin <fengwei.yin@marvell.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Bin Yang <bin.yang@marvell.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Eric Miao <eric.miao@marvell.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/da903x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define DA9034_MANUAL_CTRL 0x50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define DA9034_LDO_ADC_EN (1 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define DA9034_AUTO_CTRL1 0x51
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define DA9034_AUTO_CTRL2 0x52
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define DA9034_AUTO_TSI_EN (1 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define DA9034_PEN_DETECT (1 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define DA9034_TSI_CTRL1 0x53
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define DA9034_TSI_CTRL2 0x54
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define DA9034_TSI_X_MSB 0x6c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define DA9034_TSI_Y_MSB 0x6d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define DA9034_TSI_XY_LSB 0x6e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) STATE_IDLE, /* wait for pendown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) STATE_BUSY, /* TSI busy sampling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) STATE_STOP, /* sample available */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) STATE_WAIT, /* Wait to start next sample */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) EVENT_PEN_DOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) EVENT_PEN_UP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) EVENT_TSI_READY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) EVENT_TIMEDOUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct da9034_touch {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct device *da9034_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct delayed_work tsi_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct notifier_block notifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) int interval_ms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int x_inverted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int y_inverted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int last_x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int last_y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static inline int is_pen_down(struct da9034_touch *touch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return da903x_query_status(touch->da9034_dev, DA9034_STATUS_PEN_DOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static inline int detect_pen_down(struct da9034_touch *touch, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return da903x_set_bits(touch->da9034_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) DA9034_AUTO_CTRL2, DA9034_PEN_DETECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return da903x_clr_bits(touch->da9034_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) DA9034_AUTO_CTRL2, DA9034_PEN_DETECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int read_tsi(struct da9034_touch *touch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) uint8_t _x, _y, _v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ret = da903x_read(touch->da9034_dev, DA9034_TSI_X_MSB, &_x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ret = da903x_read(touch->da9034_dev, DA9034_TSI_Y_MSB, &_y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ret = da903x_read(touch->da9034_dev, DA9034_TSI_XY_LSB, &_v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) touch->last_x = ((_x << 2) & 0x3fc) | (_v & 0x3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) touch->last_y = ((_y << 2) & 0x3fc) | ((_v & 0xc) >> 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static inline int start_tsi(struct da9034_touch *touch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return da903x_set_bits(touch->da9034_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) DA9034_AUTO_CTRL2, DA9034_AUTO_TSI_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static inline int stop_tsi(struct da9034_touch *touch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return da903x_clr_bits(touch->da9034_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) DA9034_AUTO_CTRL2, DA9034_AUTO_TSI_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static inline void report_pen_down(struct da9034_touch *touch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int x = touch->last_x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int y = touch->last_y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) x &= 0xfff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (touch->x_inverted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) x = 1024 - x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) y &= 0xfff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (touch->y_inverted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) y = 1024 - y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) input_report_abs(touch->input_dev, ABS_X, x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) input_report_abs(touch->input_dev, ABS_Y, y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) input_report_key(touch->input_dev, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) input_sync(touch->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static inline void report_pen_up(struct da9034_touch *touch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) input_report_key(touch->input_dev, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) input_sync(touch->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static void da9034_event_handler(struct da9034_touch *touch, int event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) switch (touch->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) case STATE_IDLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (event != EVENT_PEN_DOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /* Enable auto measurement of the TSI, this will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * automatically disable pen down detection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) err = start_tsi(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) goto err_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) touch->state = STATE_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) case STATE_BUSY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (event != EVENT_TSI_READY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) err = read_tsi(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) goto err_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /* Disable auto measurement of the TSI, so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * pen down status will be available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) err = stop_tsi(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) goto err_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) touch->state = STATE_STOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* FIXME: PEN_{UP/DOWN} events are expected to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * available by stopping TSI, but this is found not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * always true, delay and simulate such an event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * here is more reliable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) mdelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) da9034_event_handler(touch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) is_pen_down(touch) ? EVENT_PEN_DOWN :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) EVENT_PEN_UP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) case STATE_STOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (event == EVENT_PEN_DOWN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) report_pen_down(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) schedule_delayed_work(&touch->tsi_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) msecs_to_jiffies(touch->interval_ms));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) touch->state = STATE_WAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (event == EVENT_PEN_UP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) report_pen_up(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) touch->state = STATE_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) case STATE_WAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (event != EVENT_TIMEDOUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (is_pen_down(touch)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) start_tsi(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) touch->state = STATE_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) report_pen_up(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) touch->state = STATE_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) err_reset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) touch->state = STATE_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) stop_tsi(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) detect_pen_down(touch, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static void da9034_tsi_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct da9034_touch *touch =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) container_of(work, struct da9034_touch, tsi_work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) da9034_event_handler(touch, EVENT_TIMEDOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static int da9034_touch_notifier(struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) unsigned long event, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct da9034_touch *touch =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) container_of(nb, struct da9034_touch, notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (event & DA9034_EVENT_TSI_READY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) da9034_event_handler(touch, EVENT_TSI_READY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if ((event & DA9034_EVENT_PEN_DOWN) && touch->state == STATE_IDLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) da9034_event_handler(touch, EVENT_PEN_DOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static int da9034_touch_open(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct da9034_touch *touch = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) ret = da903x_register_notifier(touch->da9034_dev, &touch->notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) DA9034_EVENT_PEN_DOWN | DA9034_EVENT_TSI_READY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /* Enable ADC LDO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) ret = da903x_set_bits(touch->da9034_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) DA9034_MANUAL_CTRL, DA9034_LDO_ADC_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) /* TSI_DELAY: 3 slots, TSI_SKIP: 3 slots */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL1, 0x1b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL2, 0x00);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) touch->state = STATE_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) detect_pen_down(touch, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static void da9034_touch_close(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct da9034_touch *touch = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) da903x_unregister_notifier(touch->da9034_dev, &touch->notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) DA9034_EVENT_PEN_DOWN | DA9034_EVENT_TSI_READY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) cancel_delayed_work_sync(&touch->tsi_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) touch->state = STATE_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) stop_tsi(touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) detect_pen_down(touch, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) /* Disable ADC LDO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) da903x_clr_bits(touch->da9034_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) DA9034_MANUAL_CTRL, DA9034_LDO_ADC_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static int da9034_touch_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct da9034_touch_pdata *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct da9034_touch *touch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) touch = devm_kzalloc(&pdev->dev, sizeof(struct da9034_touch),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (!touch) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) dev_err(&pdev->dev, "failed to allocate driver data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) touch->da9034_dev = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) touch->interval_ms = pdata->interval_ms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) touch->x_inverted = pdata->x_inverted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) touch->y_inverted = pdata->y_inverted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /* fallback into default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) touch->interval_ms = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) INIT_DELAYED_WORK(&touch->tsi_work, da9034_tsi_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) touch->notifier.notifier_call = da9034_touch_notifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) input_dev = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (!input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) dev_err(&pdev->dev, "failed to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) input_dev->name = pdev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) input_dev->open = da9034_touch_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) input_dev->close = da9034_touch_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) input_dev->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) __set_bit(EV_ABS, input_dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) __set_bit(ABS_X, input_dev->absbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) __set_bit(ABS_Y, input_dev->absbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) __set_bit(EV_KEY, input_dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) __set_bit(BTN_TOUCH, input_dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) touch->input_dev = input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) input_set_drvdata(input_dev, touch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) error = input_register_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static struct platform_driver da9034_touch_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) .name = "da9034-touch",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) .probe = da9034_touch_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) module_platform_driver(da9034_touch_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9034");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>, Bin Yang <bin.yang@marvell.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) MODULE_ALIAS("platform:da9034-touch");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags