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/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/module.h> 33 #include <sys/bus.h> 34 #include <sys/resource.h> 35 #include <sys/rman.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 39 #include <machine/bus.h> 40 #include <machine/resource.h> 41 42 #include <dev/fdt/simplebus.h> 43 44 #include <dev/ofw/openfirm.h> 45 #include <dev/ofw/ofw_bus.h> 46 #include <dev/ofw/ofw_bus_subr.h> 47 48 #include <arm/ti/ti_sysc.h> 49 50 #if 0 51 #define DPRINTF(dev, msg...) device_printf(dev, msg) 52 #else 53 #define DPRINTF(dev, msg...) 54 #endif 55 56 struct ti_am3359_cppi41_softc { 57 device_t dev; 58 struct syscon * syscon; 59 struct resource * res[4]; 60 bus_space_tag_t bst; 61 bus_space_handle_t bsh; 62 struct mtx mtx; 63 }; 64 65 static struct resource_spec ti_am3359_cppi41_res_spec[] = { 66 { SYS_RES_MEMORY, 0, RF_ACTIVE | RF_SHAREABLE }, 67 { SYS_RES_MEMORY, 1, RF_ACTIVE | RF_SHAREABLE }, 68 { SYS_RES_MEMORY, 2, RF_ACTIVE | RF_SHAREABLE }, 69 { SYS_RES_MEMORY, 3, RF_ACTIVE | RF_SHAREABLE }, 70 { -1, 0 } 71 }; 72 73 /* Device */ 74 static struct ofw_compat_data compat_data[] = { 75 { "ti,am3359-cppi41", 1 }, 76 { NULL, 0 } 77 }; 78 79 static int 80 ti_am3359_cppi41_write_4(device_t dev, bus_addr_t addr, uint32_t val) 81 { 82 struct ti_am3359_cppi41_softc *sc; 83 84 sc = device_get_softc(dev); 85 DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val); 86 mtx_lock(&sc->mtx); 87 bus_space_write_4(sc->bst, sc->bsh, addr, val); 88 mtx_unlock(&sc->mtx); 89 return (0); 90 } 91 92 static uint32_t 93 ti_am3359_cppi41_read_4(device_t dev, bus_addr_t addr) 94 { 95 struct ti_am3359_cppi41_softc *sc; 96 uint32_t val; 97 98 sc = device_get_softc(dev); 99 100 mtx_lock(&sc->mtx); 101 val = bus_space_read_4(sc->bst, sc->bsh, addr); 102 mtx_unlock(&sc->mtx); 103 DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, val); 104 return (val); 105 } 106 107 /* device interface */ 108 static int 109 ti_am3359_cppi41_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 device_set_desc(dev, "TI AM3359 CPPI 41"); 118 return(BUS_PROBE_DEFAULT); 119 } 120 121 static int 122 ti_am3359_cppi41_attach(device_t dev) 123 { 124 struct ti_am3359_cppi41_softc *sc; 125 uint32_t reg, reset_bit, timeout=10; 126 uint64_t sysc_address; 127 device_t parent; 128 129 sc = device_get_softc(dev); 130 sc->dev = dev; 131 132 if (bus_alloc_resources(dev, ti_am3359_cppi41_res_spec, sc->res)) { 133 device_printf(sc->dev, "Cant allocate resources\n"); 134 return (ENXIO); 135 } 136 137 sc->dev = dev; 138 sc->bst = rman_get_bustag(sc->res[0]); 139 sc->bsh = rman_get_bushandle(sc->res[0]); 140 141 mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF); 142 143 /* variant of am335x_usbss.c */ 144 DPRINTF(dev, "-- RESET USB --\n"); 145 parent = device_get_parent(dev); 146 reset_bit = ti_sysc_get_soft_reset_bit(parent); 147 if (reset_bit == 0) { 148 DPRINTF(dev, "Dont have reset bit\n"); 149 return (0); 150 } 151 sysc_address = ti_sysc_get_sysc_address_offset_host(parent); 152 DPRINTF(dev, "sysc_address %x\n", sysc_address); 153 ti_am3359_cppi41_write_4(dev, sysc_address, reset_bit); 154 DELAY(100); 155 reg = ti_am3359_cppi41_read_4(dev, sysc_address); 156 if ((reg & reset_bit) && timeout--) { 157 DPRINTF(dev, "Reset still ongoing - wait a little bit longer\n"); 158 DELAY(100); 159 reg = ti_am3359_cppi41_read_4(dev, sysc_address); 160 } 161 if (timeout == 0) 162 device_printf(dev, "USB Reset timeout\n"); 163 164 return (0); 165 } 166 167 static device_method_t ti_am3359_cppi41_methods[] = { 168 DEVMETHOD(device_probe, ti_am3359_cppi41_probe), 169 DEVMETHOD(device_attach, ti_am3359_cppi41_attach), 170 171 DEVMETHOD_END 172 }; 173 174 DEFINE_CLASS_1(ti_am3359_cppi41, ti_am3359_cppi41_driver, 175 ti_am3359_cppi41_methods,sizeof(struct ti_am3359_cppi41_softc), 176 simplebus_driver); 177 178 EARLY_DRIVER_MODULE(ti_am3359_cppi41, simplebus, ti_am3359_cppi41_driver, 0, 0, 179 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 180 MODULE_VERSION(ti_am3359_cppi41, 1); 181 MODULE_DEPEND(ti_am3359_cppi41, ti_sysc, 1, 1, 1); 182