1 /* $NetBSD: dwc2_fdt.c,v 1.2 2018/06/16 23:44:26 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Nick Hudson 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: dwc2_fdt.c,v 1.2 2018/06/16 23:44:26 jmcneill Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 #include <sys/mutex.h> 39 #include <sys/bus.h> 40 #include <sys/workqueue.h> 41 42 #include <arm/broadcom/bcm2835reg.h> 43 44 #include <dev/fdt/fdtvar.h> 45 46 #include <dev/usb/usb.h> 47 #include <dev/usb/usbdi.h> 48 #include <dev/usb/usbdivar.h> 49 #include <dev/usb/usb_mem.h> 50 51 #include <dwc2/dwc2var.h> 52 53 #include <dwc2/dwc2.h> 54 #include "dwc2_core.h" 55 56 struct dwc2_fdt_softc { 57 struct dwc2_softc sc_dwc2; 58 59 struct dwc2_core_params sc_params; 60 61 void *sc_ih; 62 int sc_phandle; 63 }; 64 65 static int dwc2_fdt_match(device_t, struct cfdata *, void *); 66 static void dwc2_fdt_attach(device_t, device_t, void *); 67 static void dwc2_fdt_deferred(device_t); 68 69 static void dwc2_fdt_rockchip_params(struct dwc2_fdt_softc *, struct dwc2_core_params *); 70 71 struct dwc2_fdt_config { 72 void (*params)(struct dwc2_fdt_softc *, struct dwc2_core_params *); 73 }; 74 75 static const struct dwc2_fdt_config dwc2_fdt_rk3066_config = { 76 .params = dwc2_fdt_rockchip_params, 77 }; 78 79 static const struct dwc2_fdt_config dwc2_fdt_generic_config = { 80 }; 81 82 static const struct of_compat_data compat_data[] = { 83 { "rockchip,rk3066-usb", (uintptr_t)&dwc2_fdt_rk3066_config }, 84 { "snps,dwc2", (uintptr_t)&dwc2_fdt_generic_config }, 85 { NULL } 86 }; 87 88 CFATTACH_DECL_NEW(dwc2_fdt, sizeof(struct dwc2_fdt_softc), 89 dwc2_fdt_match, dwc2_fdt_attach, NULL, NULL); 90 91 /* ARGSUSED */ 92 static int 93 dwc2_fdt_match(device_t parent, struct cfdata *match, void *aux) 94 { 95 struct fdt_attach_args * const faa = aux; 96 97 return of_match_compat_data(faa->faa_phandle, compat_data); 98 } 99 100 /* ARGSUSED */ 101 static void 102 dwc2_fdt_attach(device_t parent, device_t self, void *aux) 103 { 104 struct dwc2_fdt_softc *sc = device_private(self); 105 struct fdt_attach_args * const faa = aux; 106 const int phandle = faa->faa_phandle; 107 const struct dwc2_fdt_config *conf = 108 (void *)of_search_compatible(phandle, compat_data)->data; 109 char intrstr[128]; 110 struct fdtbus_phy *phy; 111 struct clk *clk; 112 bus_addr_t addr; 113 bus_size_t size; 114 int error; 115 116 const char *dr_mode = fdtbus_get_string(phandle, "dr_mode"); 117 if (dr_mode == NULL || strcmp(dr_mode, "host") != 0) { 118 aprint_error(": mode '%s' not supported\n", dr_mode); 119 return; 120 } 121 122 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 123 aprint_error(": couldn't get registers\n"); 124 return; 125 } 126 127 clk = fdtbus_clock_get(phandle, "otg"); 128 if (clk == NULL || clk_enable(clk) != 0) { 129 aprint_error(": couldn't enable otg clock\n"); 130 return; 131 } 132 133 /* Enable optional phy */ 134 phy = fdtbus_phy_get(phandle, "usb2-phy"); 135 if (phy && fdtbus_phy_enable(phy, true) != 0) { 136 aprint_error(": couldn't enable phy\n"); 137 return; 138 } 139 140 sc->sc_phandle = phandle; 141 sc->sc_dwc2.sc_dev = self; 142 sc->sc_dwc2.sc_iot = faa->faa_bst; 143 sc->sc_dwc2.sc_bus.ub_dmatag = faa->faa_dmat; 144 145 error = bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_dwc2.sc_ioh); 146 if (error) { 147 aprint_error(": couldn't map device\n"); 148 return; 149 } 150 151 if (conf->params) { 152 conf->params(sc, &sc->sc_params); 153 sc->sc_dwc2.sc_params = &sc->sc_params; 154 } 155 156 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 157 aprint_error(": failed to decode interrupt\n"); 158 return; 159 } 160 161 aprint_naive("\n"); 162 aprint_normal(": DesignWare USB2 OTG\n"); 163 164 sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_VM, FDT_INTR_MPSAFE, 165 dwc2_intr, &sc->sc_dwc2); 166 167 if (sc->sc_ih == NULL) { 168 aprint_error_dev(self, "failed to establish interrupt %s\n", 169 intrstr); 170 goto fail; 171 } 172 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 173 config_interrupts(self, dwc2_fdt_deferred); 174 175 return; 176 177 fail: 178 if (sc->sc_ih) { 179 fdtbus_intr_disestablish(sc->sc_phandle, sc->sc_ih); 180 sc->sc_ih = NULL; 181 } 182 bus_space_unmap(sc->sc_dwc2.sc_iot, sc->sc_dwc2.sc_ioh, size); 183 } 184 185 static void 186 dwc2_fdt_deferred(device_t self) 187 { 188 struct dwc2_fdt_softc *sc = device_private(self); 189 int error; 190 191 error = dwc2_init(&sc->sc_dwc2); 192 if (error != 0) { 193 aprint_error_dev(self, "couldn't initialize host, error=%d\n", 194 error); 195 return; 196 } 197 sc->sc_dwc2.sc_child = config_found(sc->sc_dwc2.sc_dev, 198 &sc->sc_dwc2.sc_bus, usbctlprint); 199 } 200 201 static void 202 dwc2_fdt_rockchip_params(struct dwc2_fdt_softc *sc, struct dwc2_core_params *params) 203 { 204 dwc2_set_all_params(params, -1); 205 206 params->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE; 207 params->host_rx_fifo_size = 525; 208 params->host_nperio_tx_fifo_size = 128; 209 params->host_perio_tx_fifo_size = 256; 210 params->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; 211 } 212