1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2025 Bojan Novković <bnovkov@FreeBSD.org> 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, 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 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/bus.h> 31 #include <sys/kernel.h> 32 #include <sys/socket.h> 33 #include <sys/module.h> 34 35 #include <net/if.h> 36 37 #include <machine/bus.h> 38 #include <machine/param.h> 39 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 #include <dev/clk/clk.h> 43 #include <dev/hwreset/hwreset.h> 44 45 #include <dev/dwc/if_dwcvar.h> 46 #include <dev/dwc/dwc1000_reg.h> 47 48 #include "if_dwc_if.h" 49 50 static int 51 if_dwc_cvitek_probe(device_t dev) 52 { 53 54 if (!ofw_bus_status_okay(dev)) 55 return (ENXIO); 56 57 if (!ofw_bus_is_compatible(dev, "cvitek,ethernet")) 58 return (ENXIO); 59 device_set_desc(dev, "CVITEK Ethernet Controller"); 60 61 return (BUS_PROBE_DEFAULT); 62 } 63 64 static int 65 if_dwc_cvitek_mii_clk(device_t dev) 66 { 67 /* 68 * XXX: This is a hack to get the driver working on 69 * the Milk-V platform. For reference, the u-boot designware 70 * driver uses the same '150_250M' clock value, but if_dwc 71 * will not work on Milk-V hardware unless the lowest 72 * bit of the PHY register address is always set. 73 */ 74 return (0x10 | GMAC_MII_CLK_150_250M_DIV102); 75 } 76 77 static device_method_t dwc_cvitek_methods[] = { 78 DEVMETHOD(device_probe, if_dwc_cvitek_probe), 79 80 DEVMETHOD(if_dwc_mii_clk, if_dwc_cvitek_mii_clk), 81 DEVMETHOD_END 82 }; 83 84 extern driver_t dwc_driver; 85 86 DEFINE_CLASS_1(dwc, dwc_cvitek_driver, dwc_cvitek_methods, 87 sizeof(struct dwc_softc), dwc_driver); 88 DRIVER_MODULE(dwc_cvitek, simplebus, dwc_cvitek_driver, 0, 0); 89 MODULE_DEPEND(dwc_cvitek, dwc, 1, 1, 1); 90