diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arm/broadcom/bcm2835/bcm2835_ft5406.c | 337 | ||||
| -rw-r--r-- | sys/arm/broadcom/bcm2835/files.bcm283x | 1 | ||||
| -rw-r--r-- | sys/boot/fdt/dts/arm/rpi.dts | 5 | ||||
| -rw-r--r-- | sys/boot/fdt/dts/arm/rpi2.dts | 5 |
4 files changed, 348 insertions, 0 deletions
diff --git a/sys/arm/broadcom/bcm2835/bcm2835_ft5406.c b/sys/arm/broadcom/bcm2835/bcm2835_ft5406.c new file mode 100644 index 0000000..1332afc --- /dev/null +++ b/sys/arm/broadcom/bcm2835/bcm2835_ft5406.c @@ -0,0 +1,337 @@ +/*- + * Copyright (C) 2016 Oleksandr Tymoshenko <gonzo@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/cpu.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/condvar.h> +#include <sys/sysctl.h> +#include <sys/selinfo.h> +#include <sys/poll.h> +#include <sys/uio.h> +#include <sys/conf.h> +#include <sys/kthread.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <dev/evdev/input.h> +#include <dev/evdev/evdev.h> + +#include <machine/bus.h> +#include <machine/cpu.h> +#include <machine/intr.h> + +#include <arm/broadcom/bcm2835/bcm2835_mbox.h> +#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h> +#include <arm/broadcom/bcm2835/bcm2835_vcbus.h> + +#include "mbox_if.h" + +#ifdef DEBUG +#define DPRINTF(fmt, ...) do { \ + printf("%s:%u: ", __func__, __LINE__); \ + printf(fmt, ##__VA_ARGS__); \ +} while (0) +#else +#define DPRINTF(fmt, ...) +#endif + +#define FT5406_LOCK(_sc) \ + mtx_lock(&(_sc)->sc_mtx) +#define FT5406_UNLOCK(_sc) \ + mtx_unlock(&(_sc)->sc_mtx) +#define FT5406_LOCK_INIT(_sc) \ + mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \ + "ft5406", MTX_DEF) +#define FT5406_LOCK_DESTROY(_sc) \ + mtx_destroy(&_sc->sc_mtx); +#define FT5406_LOCK_ASSERT(_sc) \ + mtx_assert(&(_sc)->sc_mtx, MA_OWNED) + +#define FT5406_DEVICE_MODE 0 +#define FT5406_GESTURE_ID 1 +#define FT5406_NUM_POINTS 2 +#define FT5406_POINT_XH(n) (0 + 3 + (n)*6) +#define FT5406_POINT_XL(n) (1 + 3 + (n)*6) +#define FT5406_POINT_YH(n) (2 + 3 + (n)*6) +#define FT5406_POINT_YL(n) (3 + 3 + (n)*6) +#define FT5406_WINDOW_SIZE 64 + +#define GET_NUM_POINTS(buf) (buf[FT5406_NUM_POINTS]) +#define GET_X(buf, n) (((buf[FT5406_POINT_XH(n)] & 0xf) << 8) | \ + (buf[FT5406_POINT_XL(n)])) +#define GET_Y(buf, n) (((buf[FT5406_POINT_YH(n)] & 0xf) << 8) | \ + (buf[FT5406_POINT_YL(n)])) +#define GET_TOUCH_ID(buf, n) ((buf[FT5406_POINT_YH(n)] >> 4) & 0xf) + +#define NO_POINTS 99 +#define SCREEN_WIDTH 800 +#define SCREEN_HEIGHT 480 + +struct ft5406ts_softc { + device_t sc_dev; + struct mtx sc_mtx; + struct proc *sc_worker; + + /* mbox buffer (mapped to KVA) */ + uint8_t *touch_buf; + + /* initial hook for waiting mbox intr */ + struct intr_config_hook sc_init_hook; + + struct evdev_dev *sc_evdev; + int sc_detaching; +}; + +static void +ft5406ts_worker(void *data) +{ + struct ft5406ts_softc *sc = (struct ft5406ts_softc *)data; + int points; + int id, new_x, new_y, i, new_pen_down, updated; + int x, y, pen_down; + uint8_t window[FT5406_WINDOW_SIZE]; + int tick; + + /* 60Hz */ + tick = hz*17/1000; + if (tick == 0) + tick = 1; + + x = y = -1; + pen_down = 0; + + FT5406_LOCK(sc); + while(1) { + msleep(sc, &sc->sc_mtx, PCATCH | PZERO, "ft5406ts", tick); + + if (sc->sc_detaching) + break; + + memcpy(window, sc->touch_buf, sizeof(window)); + sc->touch_buf[FT5406_NUM_POINTS] = NO_POINTS; + + points = GET_NUM_POINTS(window); + /* + * No update from VC - do nothing + */ + if (points == NO_POINTS) + continue; + + /* No points and pen is already up */ + if ((points == 0) && !pen_down) + continue; + + new_pen_down = 0; + for (i = 0; i < points; i++) { + id = GET_TOUCH_ID(window, 0); + /* For now consider only touch 0 */ + if (id != 0) + continue; + new_pen_down = 1; + new_x = GET_X(window, 0); + new_y = GET_Y(window, 0); + } + + updated = 0; + + if (new_x != x) { + x = new_x; + updated = 1; + } + + if (new_y != y) { + y = new_y; + updated = 1; + } + + if (new_pen_down != pen_down) { + pen_down = new_pen_down; + updated = 1; + } + + if (updated) { + evdev_push_event(sc->sc_evdev, EV_ABS, ABS_X, x); + evdev_push_event(sc->sc_evdev, EV_ABS, ABS_Y, y); + evdev_push_event(sc->sc_evdev, EV_KEY, BTN_TOUCH, pen_down); + evdev_sync(sc->sc_evdev); + } + } + FT5406_UNLOCK(sc); + + kproc_exit(0); +} + +static void +ft5406ts_init(void *arg) +{ + struct ft5406ts_softc *sc = arg; + struct bcm2835_mbox_tag_touchbuf msg; + uint32_t touchbuf; + int err; + + /* release this hook (continue boot) */ + config_intrhook_disestablish(&sc->sc_init_hook); + + memset(&msg, 0, sizeof(msg)); + msg.hdr.buf_size = sizeof(msg); + msg.hdr.code = BCM2835_MBOX_CODE_REQ; + msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_TOUCHBUF; + msg.tag_hdr.val_buf_size = sizeof(msg.body); + msg.tag_hdr.val_len = sizeof(msg.body); + msg.end_tag = 0; + + /* call mailbox property */ + err = bcm2835_mbox_property(&msg, sizeof(msg)); + if (err) { + device_printf(sc->sc_dev, "failed to get touchbuf address\n"); + return; + } + + if (msg.body.resp.address == 0) { + device_printf(sc->sc_dev, "touchscreen not detected\n"); + return; + } + + touchbuf = VCBUS_TO_PHYS(msg.body.resp.address); + sc->touch_buf = (uint8_t*)pmap_mapdev(touchbuf, FT5406_WINDOW_SIZE); + + sc->sc_evdev = evdev_alloc(); + evdev_set_name(sc->sc_evdev, device_get_desc(sc->sc_dev)); + evdev_set_phys(sc->sc_evdev, device_get_nameunit(sc->sc_dev)); + evdev_set_id(sc->sc_evdev, BUS_VIRTUAL, 0, 0, 0); + evdev_support_prop(sc->sc_evdev, INPUT_PROP_DIRECT); + evdev_support_event(sc->sc_evdev, EV_SYN); + evdev_support_event(sc->sc_evdev, EV_ABS); + evdev_support_event(sc->sc_evdev, EV_KEY); + + evdev_support_abs(sc->sc_evdev, ABS_X, 0, 0, + SCREEN_WIDTH, 0, 0, 0); + evdev_support_abs(sc->sc_evdev, ABS_Y, 0, 0, + SCREEN_HEIGHT, 0, 0, 0); + + evdev_support_key(sc->sc_evdev, BTN_TOUCH); + + err = evdev_register(sc->sc_evdev); + if (err) { + evdev_free(sc->sc_evdev); + return; + } + + sc->touch_buf[FT5406_NUM_POINTS] = NO_POINTS; + if (kproc_create(ft5406ts_worker, (void*)sc, &sc->sc_worker, 0, 0, + "ft5406ts_worker") != 0) { + printf("failed to create ft5406ts_worker\n"); + } +} + +static int +ft5406ts_probe(device_t dev) +{ + + if (!ofw_bus_is_compatible(dev, "rpi,rpi-ft5406")) + return (ENXIO); + + device_set_desc(dev, "FT5406 touchscreen (VC memory interface)"); + + return (BUS_PROBE_DEFAULT); +} + +static int +ft5406ts_attach(device_t dev) +{ + struct ft5406ts_softc *sc; + + /* set self dev */ + sc = device_get_softc(dev); + sc->sc_dev = dev; + + /* register callback for using mbox when interrupts are enabled */ + sc->sc_init_hook.ich_func = ft5406ts_init; + sc->sc_init_hook.ich_arg = sc; + + if (config_intrhook_establish(&sc->sc_init_hook) != 0) { + device_printf(dev, "config_intrhook_establish failed\n"); + return (ENOMEM); + } + + FT5406_LOCK_INIT(sc); + + return (0); +} + +static int +ft5406ts_detach(device_t dev) +{ + struct ft5406ts_softc *sc; + + sc = device_get_softc(dev); + + FT5406_LOCK(sc); + if (sc->sc_worker) + sc->sc_detaching = 1; + + if (sc->sc_evdev) + evdev_free(sc->sc_evdev); + FT5406_UNLOCK(sc); + + FT5406_LOCK_DESTROY(sc); + + return (0); +} + +static device_method_t ft5406ts_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, ft5406ts_probe), + DEVMETHOD(device_attach, ft5406ts_attach), + DEVMETHOD(device_detach, ft5406ts_detach), + + DEVMETHOD_END +}; + +static devclass_t ft5406ts_devclass; +static driver_t ft5406ts_driver = { + "ft5406ts", + ft5406ts_methods, + sizeof(struct ft5406ts_softc), +}; + +DRIVER_MODULE(ft5406ts, ofwbus, ft5406ts_driver, ft5406ts_devclass, 0, 0); diff --git a/sys/arm/broadcom/bcm2835/files.bcm283x b/sys/arm/broadcom/bcm2835/files.bcm283x index 27c2f6d..d9ddb75 100644 --- a/sys/arm/broadcom/bcm2835/files.bcm283x +++ b/sys/arm/broadcom/bcm2835/files.bcm283x @@ -6,6 +6,7 @@ arm/broadcom/bcm2835/bcm2835_cpufreq.c standard arm/broadcom/bcm2835/bcm2835_dma.c standard arm/broadcom/bcm2835/bcm2835_fb.c optional sc arm/broadcom/bcm2835/bcm2835_fbd.c optional vt +arm/broadcom/bcm2835/bcm2835_ft5406.c optional evdev bcm2835_ft5406 arm/broadcom/bcm2835/bcm2835_gpio.c optional gpio arm/broadcom/bcm2835/bcm2835_intr.c standard arm/broadcom/bcm2835/bcm2835_machdep.c standard diff --git a/sys/boot/fdt/dts/arm/rpi.dts b/sys/boot/fdt/dts/arm/rpi.dts index 548f888..23e1266 100644 --- a/sys/boot/fdt/dts/arm/rpi.dts +++ b/sys/boot/fdt/dts/arm/rpi.dts @@ -322,6 +322,11 @@ broadcom,depth = <0>; /* Set by VideoCore */ }; + rpi_ft5406 { + compatible = "rpi,rpi-ft5406"; + status = "okay"; + }; + leds { compatible = "gpio-leds"; diff --git a/sys/boot/fdt/dts/arm/rpi2.dts b/sys/boot/fdt/dts/arm/rpi2.dts index 951bca3..838800f 100644 --- a/sys/boot/fdt/dts/arm/rpi2.dts +++ b/sys/boot/fdt/dts/arm/rpi2.dts @@ -337,6 +337,11 @@ broadcom,depth = <0>; /* Set by VideoCore */ }; + rpi_ft5406 { + compatible = "rpi,rpi-ft5406"; + status = "okay"; + }; + leds { compatible = "gpio-leds"; |
