1 /*- 2 * Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org> 3 * 4 * Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se> 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 ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * 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 /* Based on sys/arm/ti/ti_sysc.c */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 #include <sys/resource.h> 38 #include <sys/rman.h> 39 #include <sys/lock.h> 40 #include <sys/mutex.h> 41 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 45 #include <dev/fdt/simplebus.h> 46 47 #include <dev/ofw/openfirm.h> 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 51 #include <arm/ti/ti_sysc.h> 52 53 #if 0 54 #define DPRINTF(dev, msg...) device_printf(dev, msg) 55 #else 56 #define DPRINTF(dev, msg...) 57 #endif 58 59 struct ti_am3359_cppi41_softc { 60 device_t dev; 61 struct syscon * syscon; 62 struct resource * res[4]; 63 bus_space_tag_t bst; 64 bus_space_handle_t bsh; 65 struct mtx mtx; 66 }; 67 68 static struct resource_spec ti_am3359_cppi41_res_spec[] = { 69 { SYS_RES_MEMORY, 0, RF_ACTIVE | RF_SHAREABLE }, 70 { SYS_RES_MEMORY, 1, RF_ACTIVE | RF_SHAREABLE }, 71 { SYS_RES_MEMORY, 2, RF_ACTIVE | RF_SHAREABLE }, 72 { SYS_RES_MEMORY, 3, RF_ACTIVE | RF_SHAREABLE }, 73 { -1, 0 } 74 }; 75 76 /* Device */ 77 static struct ofw_compat_data compat_data[] = { 78 { "ti,am3359-cppi41", 1 }, 79 { NULL, 0 } 80 }; 81 82 static int 83 ti_am3359_cppi41_write_4(device_t dev, bus_addr_t addr, uint32_t val) 84 { 85 struct ti_am3359_cppi41_softc *sc; 86 87 sc = device_get_softc(dev); 88 DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val); 89 mtx_lock(&sc->mtx); 90 bus_space_write_4(sc->bst, sc->bsh, addr, val); 91 mtx_unlock(&sc->mtx); 92 return (0); 93 } 94 95 static uint32_t 96 ti_am3359_cppi41_read_4(device_t dev, bus_addr_t addr) 97 { 98 struct ti_am3359_cppi41_softc *sc; 99 uint32_t val; 100 101 sc = device_get_softc(dev); 102 103 mtx_lock(&sc->mtx); 104 val = bus_space_read_4(sc->bst, sc->bsh, addr); 105 mtx_unlock(&sc->mtx); 106 DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, val); 107 return (val); 108 } 109 110 /* device interface */ 111 static int 112 ti_am3359_cppi41_probe(device_t dev) 113 { 114 if (!ofw_bus_status_okay(dev)) 115 return (ENXIO); 116 117 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 118 return (ENXIO); 119 120 device_set_desc(dev, "TI AM3359 CPPI 41"); 121 return(BUS_PROBE_DEFAULT); 122 } 123 124 static int 125 ti_am3359_cppi41_attach(device_t dev) 126 { 127 struct ti_am3359_cppi41_softc *sc; 128 uint32_t reg, reset_bit, timeout=10; 129 uint64_t sysc_address; 130 device_t parent; 131 132 sc = device_get_softc(dev); 133 sc->dev = dev; 134 135 if (bus_alloc_resources(dev, ti_am3359_cppi41_res_spec, sc->res)) { 136 device_printf(sc->dev, "Cant allocate resources\n"); 137 return (ENXIO); 138 } 139 140 sc->dev = dev; 141 sc->bst = rman_get_bustag(sc->res[0]); 142 sc->bsh = rman_get_bushandle(sc->res[0]); 143 144 mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF); 145 146 /* variant of am335x_usbss.c */ 147 DPRINTF(dev, "-- RESET USB --\n"); 148 parent = device_get_parent(dev); 149 reset_bit = ti_sysc_get_soft_reset_bit(parent); 150 if (reset_bit == 0) { 151 DPRINTF(dev, "Dont have reset bit\n"); 152 return (0); 153 } 154 sysc_address = ti_sysc_get_sysc_address_offset_host(parent); 155 DPRINTF(dev, "sysc_address %x\n", sysc_address); 156 ti_am3359_cppi41_write_4(dev, sysc_address, reset_bit); 157 DELAY(100); 158 reg = ti_am3359_cppi41_read_4(dev, sysc_address); 159 if ((reg & reset_bit) && timeout--) { 160 DPRINTF(dev, "Reset still ongoing - wait a little bit longer\n"); 161 DELAY(100); 162 reg = ti_am3359_cppi41_read_4(dev, sysc_address); 163 } 164 if (timeout == 0) 165 device_printf(dev, "USB Reset timeout\n"); 166 167 return (0); 168 } 169 170 static device_method_t ti_am3359_cppi41_methods[] = { 171 DEVMETHOD(device_probe, ti_am3359_cppi41_probe), 172 DEVMETHOD(device_attach, ti_am3359_cppi41_attach), 173 174 DEVMETHOD_END 175 }; 176 177 DEFINE_CLASS_1(ti_am3359_cppi41, ti_am3359_cppi41_driver, 178 ti_am3359_cppi41_methods,sizeof(struct ti_am3359_cppi41_softc), 179 simplebus_driver); 180 181 EARLY_DRIVER_MODULE(ti_am3359_cppi41, simplebus, ti_am3359_cppi41_driver, 0, 0, 182 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 183 MODULE_VERSION(ti_am3359_cppi41, 1); 184 MODULE_DEPEND(ti_am3359_cppi41, ti_sysc, 1, 1, 1); 185