1 /*- 2 * Copyright (c) 2016 Michal Meloun <mmel@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 #include <sys/cdefs.h> 28 /* 29 * SoC misc configuration and indentification driver. 30 */ 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/clock.h> 35 #include <sys/kernel.h> 36 #include <sys/limits.h> 37 #include <sys/lock.h> 38 #include <sys/mutex.h> 39 #include <sys/module.h> 40 #include <sys/resource.h> 41 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 #include <sys/rman.h> 45 46 #include <dev/ofw/ofw_bus.h> 47 #include <dev/ofw/ofw_bus_subr.h> 48 49 #include <arm/nvidia/tegra_efuse.h> 50 51 #define PMC_STRAPPING_OPT_A 0 /* 0x464 */ 52 53 #define PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT 4 54 #define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG \ 55 (0xf << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT) 56 #define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT \ 57 (0x3 << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT) 58 59 #define ABP_RD4(_sc, _r) bus_read_4((_sc)->abp_misc_res, (_r)) 60 #define STR_RD4(_sc, _r) bus_read_4((_sc)->strap_opt_res, (_r)) 61 62 static struct ofw_compat_data compat_data[] = { 63 {"nvidia,tegra124-apbmisc", 1}, 64 {"nvidia,tegra210-apbmisc", 1}, 65 {NULL, 0} 66 }; 67 68 struct tegra_abpmisc_softc { 69 device_t dev; 70 71 struct resource *abp_misc_res; 72 struct resource *strap_opt_res; 73 }; 74 75 static struct tegra_abpmisc_softc *dev_sc; 76 77 static void 78 tegra_abpmisc_read_revision(struct tegra_abpmisc_softc *sc) 79 { 80 uint32_t id, chip_id, minor_rev; 81 int rev; 82 83 id = ABP_RD4(sc, 4); 84 chip_id = (id >> 8) & 0xff; 85 minor_rev = (id >> 16) & 0xf; 86 87 switch (minor_rev) { 88 case 1: 89 rev = TEGRA_REVISION_A01; 90 break; 91 case 2: 92 rev = TEGRA_REVISION_A02; 93 break; 94 case 3: 95 rev = TEGRA_REVISION_A03; 96 break; 97 case 4: 98 rev = TEGRA_REVISION_A04; 99 break; 100 default: 101 rev = TEGRA_REVISION_UNKNOWN; 102 } 103 104 tegra_sku_info.chip_id = chip_id; 105 tegra_sku_info.revision = rev; 106 } 107 108 static int 109 tegra_abpmisc_probe(device_t dev) 110 { 111 if (!ofw_bus_status_okay(dev)) 112 return (ENXIO); 113 114 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 115 return (ENXIO); 116 117 return (BUS_PROBE_DEFAULT); 118 } 119 120 static int 121 tegra_abpmisc_attach(device_t dev) 122 { 123 int rid; 124 struct tegra_abpmisc_softc *sc; 125 126 sc = device_get_softc(dev); 127 sc->dev = dev; 128 129 rid = 0; 130 sc->abp_misc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 131 RF_ACTIVE | RF_SHAREABLE); 132 if (sc->abp_misc_res == NULL) { 133 device_printf(dev, "Cannot map ABP misc registers.\n"); 134 goto fail; 135 } 136 137 rid = 1; 138 sc->strap_opt_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 139 RF_ACTIVE); 140 if (sc->strap_opt_res == NULL) { 141 device_printf(dev, "Cannot map strapping options registers.\n"); 142 goto fail; 143 } 144 145 tegra_abpmisc_read_revision(sc); 146 147 /* XXX - Hack - address collision with pinmux. */ 148 if (sc->abp_misc_res != NULL) { 149 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res); 150 sc->abp_misc_res = NULL; 151 } 152 153 dev_sc = sc; 154 return (bus_generic_attach(dev)); 155 156 fail: 157 if (sc->abp_misc_res != NULL) 158 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res); 159 if (sc->strap_opt_res != NULL) 160 bus_release_resource(dev, SYS_RES_MEMORY, 1, sc->strap_opt_res); 161 162 return (ENXIO); 163 } 164 165 static int 166 tegra_abpmisc_detach(device_t dev) 167 { 168 struct tegra_abpmisc_softc *sc; 169 170 sc = device_get_softc(dev); 171 if (sc->abp_misc_res != NULL) 172 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res); 173 if (sc->strap_opt_res != NULL) 174 bus_release_resource(dev, SYS_RES_MEMORY, 1, sc->strap_opt_res); 175 return (bus_generic_detach(dev)); 176 } 177 178 static device_method_t tegra_abpmisc_methods[] = { 179 /* Device interface */ 180 DEVMETHOD(device_probe, tegra_abpmisc_probe), 181 DEVMETHOD(device_attach, tegra_abpmisc_attach), 182 DEVMETHOD(device_detach, tegra_abpmisc_detach), 183 184 DEVMETHOD_END 185 }; 186 187 static DEFINE_CLASS_0(abpmisc, tegra_abpmisc_driver, tegra_abpmisc_methods, 188 sizeof(struct tegra_abpmisc_softc)); 189 EARLY_DRIVER_MODULE(tegra_abpmisc, simplebus, tegra_abpmisc_driver, NULL, NULL, 190 BUS_PASS_TIMER); 191