1 /*- 2 * Copyright (c) 2016 Emmanuel Vadot <manu@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Allwinner Touch Sreen driver 29 * Touch screen part is not done, only the thermal sensor part is. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/rman.h> 41 #include <sys/sysctl.h> 42 #include <machine/bus.h> 43 44 #include <dev/ofw/openfirm.h> 45 #include <dev/ofw/ofw_bus.h> 46 #include <dev/ofw/ofw_bus_subr.h> 47 48 #define READ(_sc, _r) bus_read_4((_sc)->res[0], (_r)) 49 #define WRITE(_sc, _r, _v) bus_write_4((_sc)->res[0], (_r), (_v)) 50 51 /* Control register 0 */ 52 #define TP_CTRL0 0x00 53 #define TP_CTRL0_TACQ(x) ((x & 0xFF) << 0) 54 #define TP_CTRL0_FS_DIV(x) ((x & 0xF) << 16) 55 #define TP_CTRL0_CLK_DIV(x) ((x & 0x3) << 20) 56 #define TP_CTRL0_CLK_SELECT(x) ((x & 0x1) << 22) 57 58 /* Control register 1 */ 59 #define TP_CTRL1 0x04 60 #define TP_CTRL1_MODE_EN (1 << 4) 61 62 /* Control register 2 */ 63 #define TP_CTRL2 0x08 64 65 /* Control register 3 */ 66 #define TP_CTRL3 0x0C 67 68 /* Int/FIFO control register */ 69 #define TP_FIFOC 0x10 70 #define TP_FIFOC_TEMP_IRQ_ENABLE (1 << 18) 71 72 /* Int/FIFO status register */ 73 #define TP_FIFOS 0x14 74 #define TP_FIFOS_TEMP_IRQ_PENDING (1 << 18) 75 76 /* Temperature Period Register */ 77 #define TP_TPR 0x18 78 #define TP_TPR_TEMP_EN (1 << 16) 79 #define TP_TPR_TEMP_PERIOD(x) (x << 0) 80 81 /* Common data register */ 82 #define TP_CDAT 0x1C 83 84 /* Temperature data register */ 85 #define TEMP_DATA 0x20 86 87 /* TP Data register*/ 88 #define TP_DATA 0x24 89 90 /* TP IO config register */ 91 #define TP_IO_CONFIG 0x28 92 93 /* TP IO port data register */ 94 #define TP_IO_DATA 0x2C 95 96 struct aw_ts_softc { 97 device_t dev; 98 struct resource * res[2]; 99 void * intrhand; 100 int temp_data; 101 int temp_offset; 102 int temp_step; 103 }; 104 105 static struct resource_spec aw_ts_spec[] = { 106 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 107 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE }, 108 { -1, 0 } 109 }; 110 111 #define A10_TS 1 112 #define A13_TS 2 113 114 #define AW_TS_TEMP_SYSCTL 1 115 116 static struct ofw_compat_data compat_data[] = { 117 {"allwinner,sun4i-a10-ts", A10_TS}, 118 {"allwinner,sun5i-a13-ts", A13_TS}, 119 {NULL, 0} 120 }; 121 122 static void 123 aw_ts_intr(void *arg) 124 { 125 struct aw_ts_softc *sc; 126 int val; 127 128 sc= (struct aw_ts_softc *)arg; 129 130 val = READ(sc, TP_FIFOS); 131 if (val & TP_FIFOS_TEMP_IRQ_PENDING) { 132 /* Convert the value to millicelsius then millikelvin */ 133 sc->temp_data = (READ(sc, TEMP_DATA) * sc->temp_step - sc->temp_offset) 134 + 273150; 135 } 136 137 WRITE(sc, TP_FIFOS, val); 138 } 139 140 static int 141 aw_ts_probe(device_t dev) 142 { 143 144 if (!ofw_bus_status_okay(dev)) 145 return (ENXIO); 146 147 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 148 return (ENXIO); 149 150 device_set_desc(dev, "Allwinner Touch Screen controller"); 151 return (BUS_PROBE_DEFAULT); 152 } 153 154 static int 155 aw_ts_attach(device_t dev) 156 { 157 struct aw_ts_softc *sc; 158 159 sc = device_get_softc(dev); 160 sc->dev = dev; 161 162 if (bus_alloc_resources(dev, aw_ts_spec, sc->res) != 0) { 163 device_printf(dev, "could not allocate memory resource\n"); 164 return (ENXIO); 165 } 166 167 if (bus_setup_intr(dev, sc->res[1], 168 INTR_TYPE_MISC | INTR_MPSAFE, NULL, aw_ts_intr, sc, 169 &sc->intrhand)) { 170 bus_release_resources(dev, aw_ts_spec, sc->res); 171 device_printf(dev, "cannot setup interrupt handler\n"); 172 return (ENXIO); 173 } 174 175 /* 176 * Thoses magic values were taken from linux which take them from 177 * the allwinner SDK or found them by deduction 178 */ 179 switch (ofw_bus_search_compatible(dev, compat_data)->ocd_data) { 180 case A10_TS: 181 sc->temp_offset = 257000; 182 sc->temp_step = 133; 183 break; 184 case A13_TS: 185 sc->temp_offset = 144700; 186 sc->temp_step = 100; 187 break; 188 } 189 190 /* Enable clock and set divisers */ 191 WRITE(sc, TP_CTRL0, TP_CTRL0_CLK_SELECT(0) | 192 TP_CTRL0_CLK_DIV(2) | 193 TP_CTRL0_FS_DIV(7) | 194 TP_CTRL0_TACQ(63)); 195 196 /* Enable TS module */ 197 WRITE(sc, TP_CTRL1, TP_CTRL1_MODE_EN); 198 199 /* Enable Temperature, period is ~2s */ 200 WRITE(sc, TP_TPR, TP_TPR_TEMP_EN | TP_TPR_TEMP_PERIOD(1953)); 201 202 /* Enable temp irq */ 203 WRITE(sc, TP_FIFOC, TP_FIFOC_TEMP_IRQ_ENABLE); 204 205 /* Add sysctl */ 206 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 207 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 208 OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD, 209 &sc->temp_data, 0, sysctl_handle_int, 210 "IK3", "CPU Temperature"); 211 212 return (0); 213 } 214 215 static device_method_t aw_ts_methods[] = { 216 DEVMETHOD(device_probe, aw_ts_probe), 217 DEVMETHOD(device_attach, aw_ts_attach), 218 219 DEVMETHOD_END 220 }; 221 222 static driver_t aw_ts_driver = { 223 "aw_ts", 224 aw_ts_methods, 225 sizeof(struct aw_ts_softc), 226 }; 227 static devclass_t aw_ts_devclass; 228 229 DRIVER_MODULE(aw_ts, simplebus, aw_ts_driver, aw_ts_devclass, 0, 0); 230