1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2018-2021 Emmanuel Vadot <manu@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include "opt_platform.h" 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/clock.h> 36 #include <sys/eventhandler.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/reboot.h> 40 #include <sys/mutex.h> 41 #include <sys/rman.h> 42 #include <machine/bus.h> 43 44 #include <dev/iicbus/iiconf.h> 45 #include <dev/iicbus/iicbus.h> 46 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <dev/iicbus/pmic/rockchip/rk805reg.h> 51 #include <dev/iicbus/pmic/rockchip/rk808reg.h> 52 #include <dev/iicbus/pmic/rockchip/rk8xx.h> 53 54 #include "clock_if.h" 55 #include "regdev_if.h" 56 57 int 58 rk8xx_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size) 59 { 60 int err; 61 62 err = iicdev_readfrom(dev, reg, data, size, IIC_INTRWAIT); 63 return (err); 64 } 65 66 int 67 rk8xx_write(device_t dev, uint8_t reg, uint8_t *data, uint8_t size) 68 { 69 70 return (iicdev_writeto(dev, reg, data, size, IIC_INTRWAIT)); 71 } 72 73 static void 74 rk8xx_start(void *pdev) 75 { 76 struct rk8xx_softc *sc; 77 device_t dev; 78 uint8_t data[2]; 79 int err; 80 81 dev = pdev; 82 sc = device_get_softc(dev); 83 84 /* No version register in RK808 */ 85 if (bootverbose && sc->type == RK805) { 86 err = rk8xx_read(dev, RK805_CHIP_NAME, data, 1); 87 if (err != 0) { 88 device_printf(dev, "Cannot read chip name reg\n"); 89 return; 90 } 91 err = rk8xx_read(dev, RK805_CHIP_VER, data + 1, 1); 92 if (err != 0) { 93 device_printf(dev, "Cannot read chip version reg\n"); 94 return; 95 } 96 device_printf(dev, "Chip Name: %x\n", 97 data[0] << 4 | ((data[1] >> 4) & 0xf)); 98 device_printf(dev, "Chip Version: %x\n", data[1] & 0xf); 99 } 100 101 /* Register this as a 1Hz clock */ 102 clock_register(dev, 1000000); 103 104 config_intrhook_disestablish(&sc->intr_hook); 105 } 106 107 static void 108 rk8xx_poweroff(void *arg, int howto) 109 { 110 struct rk8xx_softc *sc = arg; 111 int error; 112 uint8_t val; 113 114 if ((howto & RB_POWEROFF) == 0) 115 return; 116 117 device_printf(sc->dev, "Powering off...\n"); 118 error = rk8xx_read(sc->dev, sc->dev_ctrl.dev_ctrl_reg, &val, 1); 119 if (error == 0) { 120 if (howto & RB_POWEROFF) 121 val |= sc->dev_ctrl.pwr_off_mask; 122 else if (howto & RB_POWERCYCLE) { 123 if (sc->type == RK809 || sc->type == RK817) { 124 if (bootverbose) { 125 device_printf(sc->dev, 126 "Powercycle PMIC\n"); 127 } 128 val |= sc->dev_ctrl.pwr_rst_mask;; 129 } else { 130 /* Poweroff PMIC that can't powercycle */ 131 val |= sc->dev_ctrl.pwr_off_mask; 132 } 133 } 134 error = rk8xx_write(sc->dev, sc->dev_ctrl.dev_ctrl_reg, 135 &val, 1); 136 137 /* Wait a bit for the command to take effect. */ 138 if (error == 0) 139 DELAY(100); 140 } 141 device_printf(sc->dev, "Power off failed\n"); 142 } 143 144 int 145 rk8xx_attach(struct rk8xx_softc *sc) 146 { 147 int error; 148 149 error = rk8xx_attach_clocks(sc); 150 if (error != 0) 151 return (error); 152 153 sc->intr_hook.ich_func = rk8xx_start; 154 sc->intr_hook.ich_arg = sc->dev; 155 if (config_intrhook_establish(&sc->intr_hook) != 0) 156 return (ENOMEM); 157 158 rk8xx_attach_regulators(sc); 159 160 if (OF_hasprop(ofw_bus_get_node(sc->dev), 161 "rockchip,system-power-controller")) { 162 /* 163 * The priority is chosen to override PSCI and EFI shutdown 164 * methods as those two just hang without powering off on Rock64 165 * at least. 166 */ 167 EVENTHANDLER_REGISTER(shutdown_final, rk8xx_poweroff, sc, 168 SHUTDOWN_PRI_LAST - 2); 169 } 170 171 return (0); 172 } 173 174 static int 175 rk8xx_detach(device_t dev) 176 { 177 178 /* We cannot detach regulators */ 179 return (EBUSY); 180 } 181 182 static device_method_t rk8xx_methods[] = { 183 DEVMETHOD(device_detach, rk8xx_detach), 184 185 /* regdev interface */ 186 DEVMETHOD(regdev_map, rk8xx_map), 187 188 /* Clock interface */ 189 DEVMETHOD(clock_gettime, rk8xx_gettime), 190 DEVMETHOD(clock_settime, rk8xx_settime), 191 192 DEVMETHOD_END 193 }; 194 195 DEFINE_CLASS_0(rk8xx, rk8xx_driver, rk8xx_methods, 196 sizeof(struct rk8xx_softc)); 197