1 /*- 2 * Copyright (c) 2016 Emmanuel Vadot <manu@freebsd.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 /* 27 * Allwinner Touch Sreen driver 28 * Touch screen part is not done, only the thermal sensor part is. 29 */ 30 31 #include <sys/cdefs.h> 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/rman.h> 38 #include <sys/sysctl.h> 39 #include <machine/bus.h> 40 41 #include <dev/ofw/openfirm.h> 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/ofw_bus_subr.h> 44 45 #define READ(_sc, _r) bus_read_4((_sc)->res[0], (_r)) 46 #define WRITE(_sc, _r, _v) bus_write_4((_sc)->res[0], (_r), (_v)) 47 48 /* Control register 0 */ 49 #define TP_CTRL0 0x00 50 #define TP_CTRL0_TACQ(x) ((x & 0xFF) << 0) 51 #define TP_CTRL0_FS_DIV(x) ((x & 0xF) << 16) 52 #define TP_CTRL0_CLK_DIV(x) ((x & 0x3) << 20) 53 #define TP_CTRL0_CLK_SELECT(x) ((x & 0x1) << 22) 54 55 /* Control register 1 */ 56 #define TP_CTRL1 0x04 57 #define TP_CTRL1_MODE_EN (1 << 4) 58 59 /* Control register 2 */ 60 #define TP_CTRL2 0x08 61 62 /* Control register 3 */ 63 #define TP_CTRL3 0x0C 64 65 /* Int/FIFO control register */ 66 #define TP_FIFOC 0x10 67 #define TP_FIFOC_TEMP_IRQ_ENABLE (1 << 18) 68 69 /* Int/FIFO status register */ 70 #define TP_FIFOS 0x14 71 #define TP_FIFOS_TEMP_IRQ_PENDING (1 << 18) 72 73 /* Temperature Period Register */ 74 #define TP_TPR 0x18 75 #define TP_TPR_TEMP_EN (1 << 16) 76 #define TP_TPR_TEMP_PERIOD(x) (x << 0) 77 78 /* Common data register */ 79 #define TP_CDAT 0x1C 80 81 /* Temperature data register */ 82 #define TEMP_DATA 0x20 83 84 /* TP Data register*/ 85 #define TP_DATA 0x24 86 87 /* TP IO config register */ 88 #define TP_IO_CONFIG 0x28 89 90 /* TP IO port data register */ 91 #define TP_IO_DATA 0x2C 92 93 struct aw_ts_softc { 94 device_t dev; 95 struct resource * res[2]; 96 void * intrhand; 97 int temp_data; 98 int temp_offset; 99 int temp_step; 100 }; 101 102 static struct resource_spec aw_ts_spec[] = { 103 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 104 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE }, 105 { -1, 0 } 106 }; 107 108 #define A10_TS 1 109 #define A13_TS 2 110 111 #define AW_TS_TEMP_SYSCTL 1 112 113 static struct ofw_compat_data compat_data[] = { 114 {"allwinner,sun4i-a10-ts", A10_TS}, 115 {"allwinner,sun5i-a13-ts", A13_TS}, 116 {NULL, 0} 117 }; 118 119 static void 120 aw_ts_intr(void *arg) 121 { 122 struct aw_ts_softc *sc; 123 int val; 124 125 sc= (struct aw_ts_softc *)arg; 126 127 val = READ(sc, TP_FIFOS); 128 if (val & TP_FIFOS_TEMP_IRQ_PENDING) { 129 /* Convert the value to millicelsius then millikelvin */ 130 sc->temp_data = (READ(sc, TEMP_DATA) * sc->temp_step - sc->temp_offset) 131 + 273150; 132 } 133 134 WRITE(sc, TP_FIFOS, val); 135 } 136 137 static int 138 aw_ts_probe(device_t dev) 139 { 140 141 if (!ofw_bus_status_okay(dev)) 142 return (ENXIO); 143 144 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 145 return (ENXIO); 146 147 device_set_desc(dev, "Allwinner Touch Screen controller"); 148 return (BUS_PROBE_DEFAULT); 149 } 150 151 static int 152 aw_ts_attach(device_t dev) 153 { 154 struct aw_ts_softc *sc; 155 156 sc = device_get_softc(dev); 157 sc->dev = dev; 158 159 if (bus_alloc_resources(dev, aw_ts_spec, sc->res) != 0) { 160 device_printf(dev, "could not allocate memory resource\n"); 161 return (ENXIO); 162 } 163 164 if (bus_setup_intr(dev, sc->res[1], 165 INTR_TYPE_MISC | INTR_MPSAFE, NULL, aw_ts_intr, sc, 166 &sc->intrhand)) { 167 bus_release_resources(dev, aw_ts_spec, sc->res); 168 device_printf(dev, "cannot setup interrupt handler\n"); 169 return (ENXIO); 170 } 171 172 /* 173 * Thoses magic values were taken from linux which take them from 174 * the allwinner SDK or found them by deduction 175 */ 176 switch (ofw_bus_search_compatible(dev, compat_data)->ocd_data) { 177 case A10_TS: 178 sc->temp_offset = 257000; 179 sc->temp_step = 133; 180 break; 181 case A13_TS: 182 sc->temp_offset = 144700; 183 sc->temp_step = 100; 184 break; 185 } 186 187 /* Enable clock and set divisers */ 188 WRITE(sc, TP_CTRL0, TP_CTRL0_CLK_SELECT(0) | 189 TP_CTRL0_CLK_DIV(2) | 190 TP_CTRL0_FS_DIV(7) | 191 TP_CTRL0_TACQ(63)); 192 193 /* Enable TS module */ 194 WRITE(sc, TP_CTRL1, TP_CTRL1_MODE_EN); 195 196 /* Enable Temperature, period is ~2s */ 197 WRITE(sc, TP_TPR, TP_TPR_TEMP_EN | TP_TPR_TEMP_PERIOD(1953)); 198 199 /* Enable temp irq */ 200 WRITE(sc, TP_FIFOC, TP_FIFOC_TEMP_IRQ_ENABLE); 201 202 /* Add sysctl */ 203 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 204 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 205 OID_AUTO, "temperature", 206 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 207 &sc->temp_data, 0, sysctl_handle_int, 208 "IK3", "CPU Temperature"); 209 210 return (0); 211 } 212 213 static device_method_t aw_ts_methods[] = { 214 DEVMETHOD(device_probe, aw_ts_probe), 215 DEVMETHOD(device_attach, aw_ts_attach), 216 217 DEVMETHOD_END 218 }; 219 220 static driver_t aw_ts_driver = { 221 "aw_ts", 222 aw_ts_methods, 223 sizeof(struct aw_ts_softc), 224 }; 225 226 DRIVER_MODULE(aw_ts, simplebus, aw_ts_driver, 0, 0); 227