Add evdev support to TI ADC/touchscreen driver
Add generic evdev support to touchscreen part of ti_adc: two absolute coordinates + button touch to indicate pen position. Pressure value reporting is not implemented yet. Tested on: Beaglebone Black + 4DCAPE-43T + tslib
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=305708
@ -131,3 +131,6 @@ device hdmi
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device ums
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device ukbd
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device kbdmux
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# Uncomment to enable evdev support for ti_adc
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# options EVDEV
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@ -27,6 +27,8 @@
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_evdev.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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@ -52,6 +54,11 @@ __FBSDID("$FreeBSD$");
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#ifdef EVDEV
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#include <dev/evdev/input.h>
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#include <dev/evdev/evdev.h>
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#endif
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#include <arm/ti/ti_prcm.h>
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#include <arm/ti/ti_adcreg.h>
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#include <arm/ti/ti_adcvar.h>
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@ -80,6 +87,41 @@ static struct ti_adc_input ti_adc_inputs[TI_ADC_NPINS] = {
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static int ti_adc_samples[5] = { 0, 2, 4, 8, 16 };
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static int ti_adc_detach(device_t dev);
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#ifdef EVDEV
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static evdev_open_t ti_adc_ev_open;
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static evdev_close_t ti_adc_ev_close;
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static struct evdev_methods ti_adc_evdev_methods = {
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.ev_open = &ti_adc_ev_open,
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.ev_close = &ti_adc_ev_close,
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};
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static void
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ti_adc_ev_close(struct evdev_dev *evdev, void *ev_softc)
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{
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/* Nothing to do here */
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}
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static int
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ti_adc_ev_open(struct evdev_dev *evdev, void *ev_softc)
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{
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/* Nothing to do here */
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return (0);
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}
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static void
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ti_adc_ev_report(struct ti_adc_softc *sc)
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{
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evdev_push_event(sc->sc_evdev, EV_ABS, ABS_X, sc->sc_x);
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evdev_push_event(sc->sc_evdev, EV_ABS, ABS_Y, sc->sc_y);
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evdev_push_event(sc->sc_evdev, EV_KEY, BTN_TOUCH, sc->sc_pen_down);
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evdev_sync(sc->sc_evdev);
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}
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#endif /* EVDEV */
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static void
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ti_adc_enable(struct ti_adc_softc *sc)
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{
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@ -450,7 +492,14 @@ ti_adc_tsc_read_data(struct ti_adc_softc *sc)
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#ifdef DEBUG_TSC
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device_printf(sc->sc_dev, "touchscreen x: %d, y: %d\n", x, y);
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#endif
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/* TODO: That's where actual event reporting should take place */
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#ifdef EVDEV
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if ((sc->sc_x != x) || (sc->sc_y != y)) {
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sc->sc_x = x;
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sc->sc_y = y;
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ti_adc_ev_report(sc);
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}
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#endif
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}
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static void
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@ -488,11 +537,17 @@ ti_adc_intr(void *arg)
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status |= ADC_IRQ_HW_PEN_ASYNC;
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ADC_WRITE4(sc, ADC_IRQENABLE_CLR,
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ADC_IRQ_HW_PEN_ASYNC);
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#ifdef EVDEV
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ti_adc_ev_report(sc);
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#endif
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}
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if (rawstatus & ADC_IRQ_PEN_UP) {
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sc->sc_pen_down = 0;
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status |= ADC_IRQ_PEN_UP;
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#ifdef EVDEV
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ti_adc_ev_report(sc);
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#endif
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}
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if (status & ADC_IRQ_FIFO0_THRES)
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@ -840,6 +895,39 @@ ti_adc_attach(device_t dev)
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ti_adc_setup(sc);
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TI_ADC_UNLOCK(sc);
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#ifdef EVDEV
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if (sc->sc_tsc_wires > 0) {
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sc->sc_evdev = evdev_alloc();
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evdev_set_name(sc->sc_evdev, device_get_desc(dev));
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evdev_set_phys(sc->sc_evdev, device_get_nameunit(dev));
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evdev_set_serial(sc->sc_evdev, "0");
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evdev_set_methods(sc->sc_evdev, sc, &ti_adc_evdev_methods);
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evdev_support_prop(sc->sc_evdev, INPUT_PROP_DIRECT);
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evdev_support_event(sc->sc_evdev, EV_SYN);
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evdev_support_event(sc->sc_evdev, EV_ABS);
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evdev_support_event(sc->sc_evdev, EV_KEY);
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evdev_support_abs(sc->sc_evdev, ABS_X, 0, 0,
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ADC_MAX_VALUE, 0, 0, 0);
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evdev_support_abs(sc->sc_evdev, ABS_Y, 0, 0,
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ADC_MAX_VALUE, 0, 0, 0);
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evdev_support_key(sc->sc_evdev, BTN_TOUCH);
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err = evdev_register(sc->sc_evdev);
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if (err) {
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device_printf(dev,
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"failed to register evdev: error=%d\n", err);
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ti_adc_detach(dev);
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return (err);
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}
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sc->sc_pen_down = 0;
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sc->sc_x = -1;
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sc->sc_y = -1;
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}
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#endif /* EVDEV */
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return (0);
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}
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@ -854,6 +942,11 @@ ti_adc_detach(device_t dev)
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TI_ADC_LOCK(sc);
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ti_adc_reset(sc);
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ti_adc_setup(sc);
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#ifdef EVDEV
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evdev_free(sc->sc_evdev);
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#endif
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TI_ADC_UNLOCK(sc);
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TI_ADC_LOCK_DESTROY(sc);
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@ -122,5 +122,6 @@
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#define ADC_FIFO_STEP_ID_MSK 0x000f0000
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#define ADC_FIFO_STEP_ID_SHIFT 16
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#define ADC_FIFO_DATA_MSK 0x00000fff
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#define ADC_MAX_VALUE 0xfff
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#endif /* _TI_ADCREG_H_ */
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@ -55,6 +55,11 @@ struct ti_adc_softc {
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int sc_yn_bit, sc_yn_inp;
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uint32_t sc_tsc_enabled;
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int sc_pen_down;
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#ifdef EVDEV
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int sc_x;
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int sc_y;
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struct evdev_dev *sc_evdev;
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#endif
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};
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struct ti_adc_input {
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