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 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 #include <sys/resource.h> 36 #include <sys/rman.h> 37 #include <sys/lock.h> 38 #include <sys/mutex.h> 39 40 #include <machine/bus.h> 41 #include <machine/resource.h> 42 43 #include <dev/fdt/simplebus.h> 44 45 #include <dev/ofw/openfirm.h> 46 #include <dev/ofw/ofw_bus.h> 47 #include <dev/ofw/ofw_bus_subr.h> 48 49 #include <arm/ti/ti_sysc.h> 50 51 #if 0 52 #define DPRINTF(dev, msg...) device_printf(dev, msg) 53 #else 54 #define DPRINTF(dev, msg...) 55 #endif 56 57 struct ti_am3359_cppi41_softc { 58 device_t dev; 59 struct syscon * syscon; 60 struct resource * res[4]; 61 bus_space_tag_t bst; 62 bus_space_handle_t bsh; 63 struct mtx mtx; 64 }; 65 66 static struct resource_spec ti_am3359_cppi41_res_spec[] = { 67 { SYS_RES_MEMORY, 0, RF_ACTIVE | RF_SHAREABLE }, 68 { SYS_RES_MEMORY, 1, RF_ACTIVE | RF_SHAREABLE }, 69 { SYS_RES_MEMORY, 2, RF_ACTIVE | RF_SHAREABLE }, 70 { SYS_RES_MEMORY, 3, RF_ACTIVE | RF_SHAREABLE }, 71 { -1, 0 } 72 }; 73 74 /* Device */ 75 static struct ofw_compat_data compat_data[] = { 76 { "ti,am3359-cppi41", 1 }, 77 { NULL, 0 } 78 }; 79 80 static int 81 ti_am3359_cppi41_write_4(device_t dev, bus_addr_t addr, uint32_t val) 82 { 83 struct ti_am3359_cppi41_softc *sc; 84 85 sc = device_get_softc(dev); 86 DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val); 87 mtx_lock(&sc->mtx); 88 bus_space_write_4(sc->bst, sc->bsh, addr, val); 89 mtx_unlock(&sc->mtx); 90 return (0); 91 } 92 93 static uint32_t 94 ti_am3359_cppi41_read_4(device_t dev, bus_addr_t addr) 95 { 96 struct ti_am3359_cppi41_softc *sc; 97 uint32_t val; 98 99 sc = device_get_softc(dev); 100 101 mtx_lock(&sc->mtx); 102 val = bus_space_read_4(sc->bst, sc->bsh, addr); 103 mtx_unlock(&sc->mtx); 104 DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, val); 105 return (val); 106 } 107 108 /* device interface */ 109 static int 110 ti_am3359_cppi41_probe(device_t dev) 111 { 112 if (!ofw_bus_status_okay(dev)) 113 return (ENXIO); 114 115 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 116 return (ENXIO); 117 118 device_set_desc(dev, "TI AM3359 CPPI 41"); 119 return(BUS_PROBE_DEFAULT); 120 } 121 122 static int 123 ti_am3359_cppi41_attach(device_t dev) 124 { 125 struct ti_am3359_cppi41_softc *sc; 126 uint32_t reg, reset_bit, timeout=10; 127 uint64_t sysc_address; 128 device_t parent; 129 130 sc = device_get_softc(dev); 131 sc->dev = dev; 132 133 if (bus_alloc_resources(dev, ti_am3359_cppi41_res_spec, sc->res)) { 134 device_printf(sc->dev, "Cant allocate resources\n"); 135 return (ENXIO); 136 } 137 138 sc->dev = dev; 139 sc->bst = rman_get_bustag(sc->res[0]); 140 sc->bsh = rman_get_bushandle(sc->res[0]); 141 142 mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF); 143 144 /* variant of am335x_usbss.c */ 145 DPRINTF(dev, "-- RESET USB --\n"); 146 parent = device_get_parent(dev); 147 reset_bit = ti_sysc_get_soft_reset_bit(parent); 148 if (reset_bit == 0) { 149 DPRINTF(dev, "Dont have reset bit\n"); 150 return (0); 151 } 152 sysc_address = ti_sysc_get_sysc_address_offset_host(parent); 153 DPRINTF(dev, "sysc_address %x\n", sysc_address); 154 ti_am3359_cppi41_write_4(dev, sysc_address, reset_bit); 155 DELAY(100); 156 reg = ti_am3359_cppi41_read_4(dev, sysc_address); 157 if ((reg & reset_bit) && timeout--) { 158 DPRINTF(dev, "Reset still ongoing - wait a little bit longer\n"); 159 DELAY(100); 160 reg = ti_am3359_cppi41_read_4(dev, sysc_address); 161 } 162 if (timeout == 0) 163 device_printf(dev, "USB Reset timeout\n"); 164 165 return (0); 166 } 167 168 static device_method_t ti_am3359_cppi41_methods[] = { 169 DEVMETHOD(device_probe, ti_am3359_cppi41_probe), 170 DEVMETHOD(device_attach, ti_am3359_cppi41_attach), 171 172 DEVMETHOD_END 173 }; 174 175 DEFINE_CLASS_1(ti_am3359_cppi41, ti_am3359_cppi41_driver, 176 ti_am3359_cppi41_methods,sizeof(struct ti_am3359_cppi41_softc), 177 simplebus_driver); 178 179 EARLY_DRIVER_MODULE(ti_am3359_cppi41, simplebus, ti_am3359_cppi41_driver, 0, 0, 180 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 181 MODULE_VERSION(ti_am3359_cppi41, 1); 182 MODULE_DEPEND(ti_am3359_cppi41, ti_sysc, 1, 1, 1); 183