1bf77189fSLuiz Otavio O Souza /*- 2bf77189fSLuiz Otavio O Souza * Copyright (c) 2016 Rubicon Communications, LLC (Netgate) 3bf77189fSLuiz Otavio O Souza * All rights reserved. 4bf77189fSLuiz Otavio O Souza * 5bf77189fSLuiz Otavio O Souza * Redistribution and use in source and binary forms, with or without 6bf77189fSLuiz Otavio O Souza * modification, are permitted provided that the following conditions 7bf77189fSLuiz Otavio O Souza * are met: 8bf77189fSLuiz Otavio O Souza * 1. Redistributions of source code must retain the above copyright 9bf77189fSLuiz Otavio O Souza * notice, this list of conditions and the following disclaimer. 10bf77189fSLuiz Otavio O Souza * 2. Redistributions in binary form must reproduce the above copyright 11bf77189fSLuiz Otavio O Souza * notice, this list of conditions and the following disclaimer in the 12bf77189fSLuiz Otavio O Souza * documentation and/or other materials provided with the distribution. 13bf77189fSLuiz Otavio O Souza * 14bf77189fSLuiz Otavio O Souza * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15bf77189fSLuiz Otavio O Souza * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16bf77189fSLuiz Otavio O Souza * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17bf77189fSLuiz Otavio O Souza * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18bf77189fSLuiz Otavio O Souza * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19bf77189fSLuiz Otavio O Souza * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20bf77189fSLuiz Otavio O Souza * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21bf77189fSLuiz Otavio O Souza * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22bf77189fSLuiz Otavio O Souza * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23bf77189fSLuiz Otavio O Souza * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24bf77189fSLuiz Otavio O Souza * SUCH DAMAGE. 25bf77189fSLuiz Otavio O Souza */ 26bf77189fSLuiz Otavio O Souza 27bf77189fSLuiz Otavio O Souza #include <sys/cdefs.h> 28bf77189fSLuiz Otavio O Souza __FBSDID("$FreeBSD$"); 29bf77189fSLuiz Otavio O Souza 30bf77189fSLuiz Otavio O Souza #include <sys/param.h> 31bf77189fSLuiz Otavio O Souza #include <sys/systm.h> 32bf77189fSLuiz Otavio O Souza #include <sys/bus.h> 33bf77189fSLuiz Otavio O Souza #include <sys/kernel.h> 34bf77189fSLuiz Otavio O Souza #include <sys/module.h> 35bf77189fSLuiz Otavio O Souza #include <sys/sysctl.h> 36bf77189fSLuiz Otavio O Souza 37bf77189fSLuiz Otavio O Souza #include <machine/bus.h> 38bf77189fSLuiz Otavio O Souza 39bf77189fSLuiz Otavio O Souza #include <arm/ti/am335x/am335x_scm.h> 40bf77189fSLuiz Otavio O Souza #include <arm/ti/ti_cpuid.h> 41bf77189fSLuiz Otavio O Souza #include <arm/ti/ti_scm.h> 42bf77189fSLuiz Otavio O Souza 43bf77189fSLuiz Otavio O Souza #define TZ_ZEROC 2731 44bf77189fSLuiz Otavio O Souza 45bf77189fSLuiz Otavio O Souza struct am335x_scm_softc { 46bf77189fSLuiz Otavio O Souza int sc_last_temp; 47bf77189fSLuiz Otavio O Souza struct sysctl_oid *sc_temp_oid; 48bf77189fSLuiz Otavio O Souza }; 49bf77189fSLuiz Otavio O Souza 50bf77189fSLuiz Otavio O Souza static int 51bf77189fSLuiz Otavio O Souza am335x_scm_temp_sysctl(SYSCTL_HANDLER_ARGS) 52bf77189fSLuiz Otavio O Souza { 53bf77189fSLuiz Otavio O Souza device_t dev; 54bf77189fSLuiz Otavio O Souza int i, temp; 55bf77189fSLuiz Otavio O Souza struct am335x_scm_softc *sc; 56bf77189fSLuiz Otavio O Souza uint32_t reg; 57bf77189fSLuiz Otavio O Souza 58bf77189fSLuiz Otavio O Souza dev = (device_t)arg1; 59bf77189fSLuiz Otavio O Souza sc = device_get_softc(dev); 60bf77189fSLuiz Otavio O Souza 61bf77189fSLuiz Otavio O Souza /* Read the temperature and convert to Kelvin. */ 62bf77189fSLuiz Otavio O Souza for(i = 50; i > 0; i--) { 63bf77189fSLuiz Otavio O Souza ti_scm_reg_read_4(SCM_BGAP_CTRL, ®); 64bf77189fSLuiz Otavio O Souza if ((reg & SCM_BGAP_EOCZ) == 0) 65bf77189fSLuiz Otavio O Souza break; 66bf77189fSLuiz Otavio O Souza DELAY(50); 67bf77189fSLuiz Otavio O Souza } 68bf77189fSLuiz Otavio O Souza if ((reg & SCM_BGAP_EOCZ) == 0) { 69bf77189fSLuiz Otavio O Souza sc->sc_last_temp = 70bf77189fSLuiz Otavio O Souza (reg >> SCM_BGAP_TEMP_SHIFT) & SCM_BGAP_TEMP_MASK; 71bf77189fSLuiz Otavio O Souza sc->sc_last_temp *= 10; 72bf77189fSLuiz Otavio O Souza } 73bf77189fSLuiz Otavio O Souza temp = sc->sc_last_temp + TZ_ZEROC; 74bf77189fSLuiz Otavio O Souza 75bf77189fSLuiz Otavio O Souza return (sysctl_handle_int(oidp, &temp, 0, req)); 76bf77189fSLuiz Otavio O Souza } 77bf77189fSLuiz Otavio O Souza 78bf77189fSLuiz Otavio O Souza static void 79bf77189fSLuiz Otavio O Souza am335x_scm_identify(driver_t *driver, device_t parent) 80bf77189fSLuiz Otavio O Souza { 81bf77189fSLuiz Otavio O Souza device_t child; 82bf77189fSLuiz Otavio O Souza 83bf77189fSLuiz Otavio O Souza /* AM335x only. */ 84bf77189fSLuiz Otavio O Souza if (ti_chip() != CHIP_AM335X) 85bf77189fSLuiz Otavio O Souza return; 86bf77189fSLuiz Otavio O Souza 87bf77189fSLuiz Otavio O Souza /* Make sure we attach only once. */ 88bf77189fSLuiz Otavio O Souza if (device_find_child(parent, "am335x_scm", -1) != NULL) 89bf77189fSLuiz Otavio O Souza return; 90bf77189fSLuiz Otavio O Souza 91bf77189fSLuiz Otavio O Souza child = device_add_child(parent, "am335x_scm", -1); 92bf77189fSLuiz Otavio O Souza if (child == NULL) 93bf77189fSLuiz Otavio O Souza device_printf(parent, "cannot add ti_scm child\n"); 94bf77189fSLuiz Otavio O Souza } 95bf77189fSLuiz Otavio O Souza 96bf77189fSLuiz Otavio O Souza static int 97bf77189fSLuiz Otavio O Souza am335x_scm_probe(device_t dev) 98bf77189fSLuiz Otavio O Souza { 99bf77189fSLuiz Otavio O Souza 100bf77189fSLuiz Otavio O Souza device_set_desc(dev, "AM335x Control Module Extension"); 101bf77189fSLuiz Otavio O Souza 102bf77189fSLuiz Otavio O Souza return (BUS_PROBE_DEFAULT); 103bf77189fSLuiz Otavio O Souza } 104bf77189fSLuiz Otavio O Souza 105bf77189fSLuiz Otavio O Souza static int 106bf77189fSLuiz Otavio O Souza am335x_scm_attach(device_t dev) 107bf77189fSLuiz Otavio O Souza { 108bf77189fSLuiz Otavio O Souza struct am335x_scm_softc *sc; 109bf77189fSLuiz Otavio O Souza struct sysctl_ctx_list *ctx; 110bf77189fSLuiz Otavio O Souza struct sysctl_oid_list *tree; 111bf77189fSLuiz Otavio O Souza uint32_t reg; 112bf77189fSLuiz Otavio O Souza 113ab8fdaccSLuiz Otavio O Souza /* Reset the digital outputs. */ 114ab8fdaccSLuiz Otavio O Souza ti_scm_reg_write_4(SCM_BGAP_CTRL, 0); 115bf77189fSLuiz Otavio O Souza ti_scm_reg_read_4(SCM_BGAP_CTRL, ®); 116ab8fdaccSLuiz Otavio O Souza DELAY(500); 117ab8fdaccSLuiz Otavio O Souza /* Set continous mode. */ 118ab8fdaccSLuiz Otavio O Souza ti_scm_reg_write_4(SCM_BGAP_CTRL, SCM_BGAP_CONTCONV); 119ab8fdaccSLuiz Otavio O Souza ti_scm_reg_read_4(SCM_BGAP_CTRL, ®); 120ab8fdaccSLuiz Otavio O Souza DELAY(500); 121bf77189fSLuiz Otavio O Souza /* Start the ADC conversion. */ 122bf77189fSLuiz Otavio O Souza reg = SCM_BGAP_CLRZ | SCM_BGAP_CONTCONV | SCM_BGAP_SOC; 123bf77189fSLuiz Otavio O Souza ti_scm_reg_write_4(SCM_BGAP_CTRL, reg); 124bf77189fSLuiz Otavio O Souza 125bf77189fSLuiz Otavio O Souza /* Temperature sysctl. */ 126bf77189fSLuiz Otavio O Souza sc = device_get_softc(dev); 127bf77189fSLuiz Otavio O Souza ctx = device_get_sysctl_ctx(dev); 128bf77189fSLuiz Otavio O Souza tree = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); 129bf77189fSLuiz Otavio O Souza sc->sc_temp_oid = SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, 130bf77189fSLuiz Otavio O Souza "temperature", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, 131bf77189fSLuiz Otavio O Souza dev, 0, am335x_scm_temp_sysctl, "IK", "Current temperature"); 132bf77189fSLuiz Otavio O Souza 133bf77189fSLuiz Otavio O Souza return (0); 134bf77189fSLuiz Otavio O Souza } 135bf77189fSLuiz Otavio O Souza 136bf77189fSLuiz Otavio O Souza static int 137bf77189fSLuiz Otavio O Souza am335x_scm_detach(device_t dev) 138bf77189fSLuiz Otavio O Souza { 139bf77189fSLuiz Otavio O Souza struct am335x_scm_softc *sc; 140bf77189fSLuiz Otavio O Souza 141bf77189fSLuiz Otavio O Souza sc = device_get_softc(dev); 142bf77189fSLuiz Otavio O Souza 143bf77189fSLuiz Otavio O Souza /* Remove temperature sysctl. */ 144bf77189fSLuiz Otavio O Souza if (sc->sc_temp_oid != NULL) 145bf77189fSLuiz Otavio O Souza sysctl_remove_oid(sc->sc_temp_oid, 1, 0); 146bf77189fSLuiz Otavio O Souza 147bf77189fSLuiz Otavio O Souza /* Stop the bandgap ADC. */ 148bf77189fSLuiz Otavio O Souza ti_scm_reg_write_4(SCM_BGAP_CTRL, SCM_BGAP_BGOFF); 149bf77189fSLuiz Otavio O Souza 150bf77189fSLuiz Otavio O Souza return (0); 151bf77189fSLuiz Otavio O Souza } 152bf77189fSLuiz Otavio O Souza 153bf77189fSLuiz Otavio O Souza static device_method_t am335x_scm_methods[] = { 154bf77189fSLuiz Otavio O Souza DEVMETHOD(device_identify, am335x_scm_identify), 155bf77189fSLuiz Otavio O Souza DEVMETHOD(device_probe, am335x_scm_probe), 156bf77189fSLuiz Otavio O Souza DEVMETHOD(device_attach, am335x_scm_attach), 157bf77189fSLuiz Otavio O Souza DEVMETHOD(device_detach, am335x_scm_detach), 158bf77189fSLuiz Otavio O Souza 159bf77189fSLuiz Otavio O Souza DEVMETHOD_END 160bf77189fSLuiz Otavio O Souza }; 161bf77189fSLuiz Otavio O Souza 162bf77189fSLuiz Otavio O Souza static driver_t am335x_scm_driver = { 163bf77189fSLuiz Otavio O Souza "am335x_scm", 164bf77189fSLuiz Otavio O Souza am335x_scm_methods, 165bf77189fSLuiz Otavio O Souza sizeof(struct am335x_scm_softc), 166bf77189fSLuiz Otavio O Souza }; 167bf77189fSLuiz Otavio O Souza 168bf77189fSLuiz Otavio O Souza static devclass_t am335x_scm_devclass; 169bf77189fSLuiz Otavio O Souza 170bf77189fSLuiz Otavio O Souza DRIVER_MODULE(am335x_scm, ti_scm, am335x_scm_driver, am335x_scm_devclass, 0, 0); 171bf77189fSLuiz Otavio O Souza MODULE_VERSION(am335x_scm, 1); 172bf77189fSLuiz Otavio O Souza MODULE_DEPEND(am335x_scm, ti_scm, 1, 1, 1); 173