1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/param.h> 31 #include <sys/bus.h> 32 #include <sys/clock.h> 33 #include <sys/eventhandler.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/reboot.h> 37 #include <sys/mutex.h> 38 #include <sys/rman.h> 39 #include <machine/bus.h> 40 41 #include <dev/iicbus/iiconf.h> 42 #include <dev/iicbus/iicbus.h> 43 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 47 #include <dev/iicbus/pmic/rockchip/rk805reg.h> 48 #include <dev/iicbus/pmic/rockchip/rk808reg.h> 49 #include <dev/iicbus/pmic/rockchip/rk8xx.h> 50 51 #include "clock_if.h" 52 #include "regdev_if.h" 53 54 int 55 rk8xx_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size) 56 { 57 int err; 58 59 err = iicdev_readfrom(dev, reg, data, size, IIC_INTRWAIT); 60 return (err); 61 } 62 63 int 64 rk8xx_write(device_t dev, uint8_t reg, uint8_t *data, uint8_t size) 65 { 66 67 return (iicdev_writeto(dev, reg, data, size, IIC_INTRWAIT)); 68 } 69 70 static void 71 rk8xx_start(void *pdev) 72 { 73 struct rk8xx_softc *sc; 74 device_t dev; 75 uint8_t data[2]; 76 int err; 77 78 dev = pdev; 79 sc = device_get_softc(dev); 80 81 /* No version register in RK808 */ 82 if (bootverbose && sc->type == RK805) { 83 err = rk8xx_read(dev, RK805_CHIP_NAME, data, 1); 84 if (err != 0) { 85 device_printf(dev, "Cannot read chip name reg\n"); 86 return; 87 } 88 err = rk8xx_read(dev, RK805_CHIP_VER, data + 1, 1); 89 if (err != 0) { 90 device_printf(dev, "Cannot read chip version reg\n"); 91 return; 92 } 93 device_printf(dev, "Chip Name: %x\n", 94 data[0] << 4 | ((data[1] >> 4) & 0xf)); 95 device_printf(dev, "Chip Version: %x\n", data[1] & 0xf); 96 } 97 98 /* Register this as a 1Hz clock */ 99 clock_register(dev, 1000000); 100 101 config_intrhook_disestablish(&sc->intr_hook); 102 } 103 104 static void 105 rk8xx_poweroff(void *arg, int howto) 106 { 107 struct rk8xx_softc *sc = arg; 108 int error; 109 uint8_t val; 110 111 if ((howto & (RB_POWEROFF | RB_POWERCYCLE)) == 0) 112 return; 113 114 device_printf(sc->dev, "Powering off...\n"); 115 error = rk8xx_read(sc->dev, sc->dev_ctrl.dev_ctrl_reg, &val, 1); 116 if (error == 0) { 117 if (howto & RB_POWEROFF) 118 val |= sc->dev_ctrl.pwr_off_mask; 119 else if (howto & RB_POWERCYCLE) { 120 if (sc->type == RK809 || sc->type == RK817) { 121 if (bootverbose) { 122 device_printf(sc->dev, 123 "Powercycle PMIC\n"); 124 } 125 val |= sc->dev_ctrl.pwr_rst_mask; 126 } else { 127 /* Poweroff PMIC that can't powercycle */ 128 val |= sc->dev_ctrl.pwr_off_mask; 129 } 130 } 131 error = rk8xx_write(sc->dev, sc->dev_ctrl.dev_ctrl_reg, 132 &val, 1); 133 134 /* Wait a bit for the command to take effect. */ 135 if (error == 0) 136 DELAY(100); 137 } 138 device_printf(sc->dev, "Power off failed\n"); 139 } 140 141 int 142 rk8xx_attach(struct rk8xx_softc *sc) 143 { 144 int error; 145 146 error = rk8xx_attach_clocks(sc); 147 if (error != 0) 148 return (error); 149 150 sc->intr_hook.ich_func = rk8xx_start; 151 sc->intr_hook.ich_arg = sc->dev; 152 if (config_intrhook_establish(&sc->intr_hook) != 0) 153 return (ENOMEM); 154 155 rk8xx_attach_regulators(sc); 156 157 if (OF_hasprop(ofw_bus_get_node(sc->dev), 158 "rockchip,system-power-controller")) { 159 /* 160 * The priority is chosen to override PSCI and EFI shutdown 161 * methods as those two just hang without powering off on Rock64 162 * at least. 163 */ 164 EVENTHANDLER_REGISTER(shutdown_final, rk8xx_poweroff, sc, 165 SHUTDOWN_PRI_LAST - 2); 166 } 167 168 return (0); 169 } 170 171 static int 172 rk8xx_detach(device_t dev) 173 { 174 175 /* We cannot detach regulators */ 176 return (EBUSY); 177 } 178 179 static device_method_t rk8xx_methods[] = { 180 DEVMETHOD(device_detach, rk8xx_detach), 181 182 /* regdev interface */ 183 DEVMETHOD(regdev_map, rk8xx_map), 184 185 /* Clock interface */ 186 DEVMETHOD(clock_gettime, rk8xx_gettime), 187 DEVMETHOD(clock_settime, rk8xx_settime), 188 189 DEVMETHOD_END 190 }; 191 192 DEFINE_CLASS_0(rk8xx, rk8xx_driver, rk8xx_methods, 193 sizeof(struct rk8xx_softc)); 194