/*- * Copyright (c) 2016 Emmanuel Vadot * * 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. */ /* * Allwinner Touch Sreen driver * Touch screen part is not done, only the thermal sensor part is. */ #include #include #include #include #include #include #include #include #include #include #include #include #define READ(_sc, _r) bus_read_4((_sc)->res[0], (_r)) #define WRITE(_sc, _r, _v) bus_write_4((_sc)->res[0], (_r), (_v)) /* Control register 0 */ #define TP_CTRL0 0x00 #define TP_CTRL0_TACQ(x) ((x & 0xFF) << 0) #define TP_CTRL0_FS_DIV(x) ((x & 0xF) << 16) #define TP_CTRL0_CLK_DIV(x) ((x & 0x3) << 20) #define TP_CTRL0_CLK_SELECT(x) ((x & 0x1) << 22) /* Control register 1 */ #define TP_CTRL1 0x04 #define TP_CTRL1_MODE_EN (1 << 4) /* Control register 2 */ #define TP_CTRL2 0x08 /* Control register 3 */ #define TP_CTRL3 0x0C /* Int/FIFO control register */ #define TP_FIFOC 0x10 #define TP_FIFOC_TEMP_IRQ_ENABLE (1 << 18) /* Int/FIFO status register */ #define TP_FIFOS 0x14 #define TP_FIFOS_TEMP_IRQ_PENDING (1 << 18) /* Temperature Period Register */ #define TP_TPR 0x18 #define TP_TPR_TEMP_EN (1 << 16) #define TP_TPR_TEMP_PERIOD(x) (x << 0) /* Common data register */ #define TP_CDAT 0x1C /* Temperature data register */ #define TEMP_DATA 0x20 /* TP Data register*/ #define TP_DATA 0x24 /* TP IO config register */ #define TP_IO_CONFIG 0x28 /* TP IO port data register */ #define TP_IO_DATA 0x2C struct aw_ts_softc { device_t dev; struct resource * res[2]; void * intrhand; int temp_data; int temp_offset; int temp_step; }; static struct resource_spec aw_ts_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE }, { -1, 0 } }; #define A10_TS 1 #define A13_TS 2 #define AW_TS_TEMP_SYSCTL 1 static struct ofw_compat_data compat_data[] = { {"allwinner,sun4i-a10-ts", A10_TS}, {"allwinner,sun5i-a13-ts", A13_TS}, {NULL, 0} }; static void aw_ts_intr(void *arg) { struct aw_ts_softc *sc; int val; sc= (struct aw_ts_softc *)arg; val = READ(sc, TP_FIFOS); if (val & TP_FIFOS_TEMP_IRQ_PENDING) { /* Convert the value to millicelsius then millikelvin */ sc->temp_data = (READ(sc, TEMP_DATA) * sc->temp_step - sc->temp_offset) + 273150; } WRITE(sc, TP_FIFOS, val); } static int aw_ts_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) return (ENXIO); device_set_desc(dev, "Allwinner Touch Screen controller"); return (BUS_PROBE_DEFAULT); } static int aw_ts_attach(device_t dev) { struct aw_ts_softc *sc; sc = device_get_softc(dev); sc->dev = dev; if (bus_alloc_resources(dev, aw_ts_spec, sc->res) != 0) { device_printf(dev, "could not allocate memory resource\n"); return (ENXIO); } if (bus_setup_intr(dev, sc->res[1], INTR_TYPE_MISC | INTR_MPSAFE, NULL, aw_ts_intr, sc, &sc->intrhand)) { bus_release_resources(dev, aw_ts_spec, sc->res); device_printf(dev, "cannot setup interrupt handler\n"); return (ENXIO); } /* * Thoses magic values were taken from linux which take them from * the allwinner SDK or found them by deduction */ switch (ofw_bus_search_compatible(dev, compat_data)->ocd_data) { case A10_TS: sc->temp_offset = 257000; sc->temp_step = 133; break; case A13_TS: sc->temp_offset = 144700; sc->temp_step = 100; break; } /* Enable clock and set divisers */ WRITE(sc, TP_CTRL0, TP_CTRL0_CLK_SELECT(0) | TP_CTRL0_CLK_DIV(2) | TP_CTRL0_FS_DIV(7) | TP_CTRL0_TACQ(63)); /* Enable TS module */ WRITE(sc, TP_CTRL1, TP_CTRL1_MODE_EN); /* Enable Temperature, period is ~2s */ WRITE(sc, TP_TPR, TP_TPR_TEMP_EN | TP_TPR_TEMP_PERIOD(1953)); /* Enable temp irq */ WRITE(sc, TP_FIFOC, TP_FIFOC_TEMP_IRQ_ENABLE); /* Add sysctl */ SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &sc->temp_data, 0, sysctl_handle_int, "IK3", "CPU Temperature"); return (0); } static device_method_t aw_ts_methods[] = { DEVMETHOD(device_probe, aw_ts_probe), DEVMETHOD(device_attach, aw_ts_attach), DEVMETHOD_END }; static driver_t aw_ts_driver = { "aw_ts", aw_ts_methods, sizeof(struct aw_ts_softc), }; static devclass_t aw_ts_devclass; DRIVER_MODULE(aw_ts, simplebus, aw_ts_driver, aw_ts_devclass, 0, 0);