2 * Copyright (c) 2016 Emmanuel Vadot <manu@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * Allwinner Touch Sreen driver
29 * Touch screen part is not done, only the thermal sensor part is.
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
41 #include <sys/sysctl.h>
42 #include <machine/bus.h>
44 #include <dev/fdt/fdt_common.h>
45 #include <dev/ofw/openfirm.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_bus_subr.h>
49 #define READ(_sc, _r) bus_read_4((_sc)->res[0], (_r))
50 #define WRITE(_sc, _r, _v) bus_write_4((_sc)->res[0], (_r), (_v))
52 /* Control register 0 */
54 #define TP_CTRL0_TACQ(x) ((x & 0xFF) << 0)
55 #define TP_CTRL0_FS_DIV(x) ((x & 0xF) << 16)
56 #define TP_CTRL0_CLK_DIV(x) ((x & 0x3) << 20)
57 #define TP_CTRL0_CLK_SELECT(x) ((x & 0x1) << 22)
59 /* Control register 1 */
61 #define TP_CTRL1_MODE_EN (1 << 4)
63 /* Control register 2 */
66 /* Control register 3 */
69 /* Int/FIFO control register */
71 #define TP_FIFOC_TEMP_IRQ_ENABLE (1 << 18)
73 /* Int/FIFO status register */
75 #define TP_FIFOS_TEMP_IRQ_PENDING (1 << 18)
77 /* Temperature Period Register */
79 #define TP_TPR_TEMP_EN (1 << 16)
80 #define TP_TPR_TEMP_PERIOD(x) (x << 0)
82 /* Common data register */
85 /* Temperature data register */
86 #define TEMP_DATA 0x20
91 /* TP IO config register */
92 #define TP_IO_CONFIG 0x28
94 /* TP IO port data register */
95 #define TP_IO_DATA 0x2C
99 struct resource * res[2];
106 static struct resource_spec aw_ts_spec[] = {
107 { SYS_RES_MEMORY, 0, RF_ACTIVE },
108 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE },
115 #define AW_TS_TEMP_SYSCTL 1
117 static struct ofw_compat_data compat_data[] = {
118 {"allwinner,sun4i-a10-ts", A10_TS},
119 {"allwinner,sun5i-a13-ts", A13_TS},
124 aw_ts_intr(void *arg)
126 struct aw_ts_softc *sc;
129 sc= (struct aw_ts_softc *)arg;
131 val = READ(sc, TP_FIFOS);
132 if (val & TP_FIFOS_TEMP_IRQ_PENDING) {
133 /* Convert the value to millicelsius then millikelvin */
134 sc->temp_data = (READ(sc, TEMP_DATA) * sc->temp_step - sc->temp_offset)
138 WRITE(sc, TP_FIFOS, val);
142 aw_ts_probe(device_t dev)
145 if (!ofw_bus_status_okay(dev))
148 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
151 device_set_desc(dev, "Allwinner Touch Screen controller");
152 return (BUS_PROBE_DEFAULT);
156 aw_ts_attach(device_t dev)
158 struct aw_ts_softc *sc;
160 sc = device_get_softc(dev);
163 if (bus_alloc_resources(dev, aw_ts_spec, sc->res) != 0) {
164 device_printf(dev, "could not allocate memory resource\n");
168 if (bus_setup_intr(dev, sc->res[1],
169 INTR_TYPE_MISC | INTR_MPSAFE, NULL, aw_ts_intr, sc,
171 bus_release_resources(dev, aw_ts_spec, sc->res);
172 device_printf(dev, "cannot setup interrupt handler\n");
177 * Thoses magic values were taken from linux which take them from
178 * the allwinner SDK or found them by deduction
180 switch (ofw_bus_search_compatible(dev, compat_data)->ocd_data) {
182 sc->temp_offset = 257000;
186 sc->temp_offset = 144700;
191 /* Enable clock and set divisers */
192 WRITE(sc, TP_CTRL0, TP_CTRL0_CLK_SELECT(0) |
193 TP_CTRL0_CLK_DIV(2) |
197 /* Enable TS module */
198 WRITE(sc, TP_CTRL1, TP_CTRL1_MODE_EN);
200 /* Enable Temperature, period is ~2s */
201 WRITE(sc, TP_TPR, TP_TPR_TEMP_EN | TP_TPR_TEMP_PERIOD(1953));
203 /* Enable temp irq */
204 WRITE(sc, TP_FIFOC, TP_FIFOC_TEMP_IRQ_ENABLE);
207 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
208 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
209 OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD,
210 &sc->temp_data, 0, sysctl_handle_int,
211 "IK3", "CPU Temperature");
216 static device_method_t aw_ts_methods[] = {
217 DEVMETHOD(device_probe, aw_ts_probe),
218 DEVMETHOD(device_attach, aw_ts_attach),
223 static driver_t aw_ts_driver = {
226 sizeof(struct aw_ts_softc),
228 static devclass_t aw_ts_devclass;
230 DRIVER_MODULE(aw_ts, simplebus, aw_ts_driver, aw_ts_devclass, 0, 0);