1 /*- 2 * Copyright (c) 2015 Luiz Otavio O Souza <loos@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 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 #include <net/if_media.h> 37 38 #include <machine/bus.h> 39 40 #include <dev/mii/miivar.h> 41 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/ofw_bus_subr.h> 44 45 #include <dev/extres/clk/clk.h> 46 #include <dev/extres/hwreset/hwreset.h> 47 #include <dev/extres/regulator/regulator.h> 48 49 #include <arm/allwinner/aw_machdep.h> 50 51 #include <dev/dwc/if_dwcvar.h> 52 #include <dev/dwc/dwc1000_reg.h> 53 54 #include "if_dwc_if.h" 55 56 static int 57 a20_if_dwc_probe(device_t dev) 58 { 59 60 if (!ofw_bus_status_okay(dev)) 61 return (ENXIO); 62 if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-gmac")) 63 return (ENXIO); 64 device_set_desc(dev, "A20 Gigabit Ethernet Controller"); 65 66 return (BUS_PROBE_DEFAULT); 67 } 68 69 static int 70 a20_if_dwc_init(device_t dev) 71 { 72 struct dwc_softc *sc; 73 const char *tx_parent_name; 74 clk_t clk_tx, clk_tx_parent; 75 regulator_t reg; 76 int error; 77 78 sc = device_get_softc(dev); 79 80 /* Configure PHY for MII or RGMII mode */ 81 switch(sc->phy_mode) { 82 case MII_CONTYPE_RGMII: 83 case MII_CONTYPE_RGMII_ID: 84 case MII_CONTYPE_RGMII_RXID: 85 case MII_CONTYPE_RGMII_TXID: 86 tx_parent_name = "gmac_int_tx"; 87 break; 88 case MII_CONTYPE_MII: 89 tx_parent_name = "mii_phy_tx"; 90 break; 91 default: 92 device_printf(dev, "unsupported PHY connection type: %d", 93 sc->phy_mode); 94 return (ENXIO); 95 } 96 97 error = clk_get_by_ofw_name(dev, 0, "allwinner_gmac_tx", &clk_tx); 98 if (error != 0) { 99 device_printf(dev, "could not get tx clk\n"); 100 return (error); 101 } 102 error = clk_get_by_name(dev, tx_parent_name, &clk_tx_parent); 103 if (error != 0) { 104 device_printf(dev, "could not get clock '%s'\n", 105 tx_parent_name); 106 return (error); 107 } 108 error = clk_set_parent_by_clk(clk_tx, clk_tx_parent); 109 if (error != 0) { 110 device_printf(dev, "could not set tx clk parent\n"); 111 return (error); 112 } 113 114 /* Enable PHY regulator if applicable */ 115 if (regulator_get_by_ofw_property(dev, 0, "phy-supply", ®) == 0) { 116 error = regulator_enable(reg); 117 if (error != 0) { 118 device_printf(dev, "could not enable PHY regulator\n"); 119 return (error); 120 } 121 } 122 123 return (0); 124 } 125 126 static int 127 a20_if_dwc_mii_clk(device_t dev) 128 { 129 130 return (GMAC_MII_CLK_150_250M_DIV102); 131 } 132 133 static device_method_t a20_dwc_methods[] = { 134 DEVMETHOD(device_probe, a20_if_dwc_probe), 135 136 DEVMETHOD(if_dwc_init, a20_if_dwc_init), 137 DEVMETHOD(if_dwc_mii_clk, a20_if_dwc_mii_clk), 138 139 DEVMETHOD_END 140 }; 141 142 extern driver_t dwc_driver; 143 144 DEFINE_CLASS_1(dwc, a20_dwc_driver, a20_dwc_methods, sizeof(struct dwc_softc), 145 dwc_driver); 146 DRIVER_MODULE(a20_dwc, simplebus, a20_dwc_driver, 0, 0); 147 148 MODULE_DEPEND(a20_dwc, dwc, 1, 1, 1); 149