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/param.h> 28 #include <sys/systm.h> 29 #include <sys/bus.h> 30 #include <sys/kernel.h> 31 #include <sys/socket.h> 32 #include <sys/module.h> 33 34 #include <net/if.h> 35 #include <net/if_media.h> 36 37 #include <machine/bus.h> 38 39 #include <dev/mii/miivar.h> 40 41 #include <dev/ofw/ofw_bus.h> 42 #include <dev/ofw/ofw_bus_subr.h> 43 44 #include <dev/clk/clk.h> 45 #include <dev/hwreset/hwreset.h> 46 #include <dev/regulator/regulator.h> 47 48 #include <arm/allwinner/aw_machdep.h> 49 50 #include <dev/dwc/if_dwcvar.h> 51 #include <dev/dwc/dwc1000_reg.h> 52 53 #include "if_dwc_if.h" 54 55 static int 56 a20_if_dwc_probe(device_t dev) 57 { 58 59 if (!ofw_bus_status_okay(dev)) 60 return (ENXIO); 61 if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-gmac")) 62 return (ENXIO); 63 device_set_desc(dev, "A20 Gigabit Ethernet Controller"); 64 65 return (BUS_PROBE_DEFAULT); 66 } 67 68 static int 69 a20_if_dwc_init(device_t dev) 70 { 71 struct dwc_softc *sc; 72 const char *tx_parent_name; 73 clk_t clk_tx, clk_tx_parent; 74 regulator_t reg; 75 int error; 76 77 sc = device_get_softc(dev); 78 79 /* Configure PHY for MII or RGMII mode */ 80 switch(sc->phy_mode) { 81 case MII_CONTYPE_RGMII: 82 case MII_CONTYPE_RGMII_ID: 83 case MII_CONTYPE_RGMII_RXID: 84 case MII_CONTYPE_RGMII_TXID: 85 tx_parent_name = "gmac_int_tx"; 86 break; 87 case MII_CONTYPE_MII: 88 tx_parent_name = "mii_phy_tx"; 89 break; 90 default: 91 device_printf(dev, "unsupported PHY connection type: %d", 92 sc->phy_mode); 93 return (ENXIO); 94 } 95 96 error = clk_get_by_ofw_name(dev, 0, "allwinner_gmac_tx", &clk_tx); 97 if (error != 0) { 98 device_printf(dev, "could not get tx clk\n"); 99 return (error); 100 } 101 error = clk_get_by_name(dev, tx_parent_name, &clk_tx_parent); 102 if (error != 0) { 103 device_printf(dev, "could not get clock '%s'\n", 104 tx_parent_name); 105 return (error); 106 } 107 error = clk_set_parent_by_clk(clk_tx, clk_tx_parent); 108 if (error != 0) { 109 device_printf(dev, "could not set tx clk parent\n"); 110 return (error); 111 } 112 113 /* Enable PHY regulator if applicable */ 114 if (regulator_get_by_ofw_property(dev, 0, "phy-supply", ®) == 0) { 115 error = regulator_enable(reg); 116 if (error != 0) { 117 device_printf(dev, "could not enable PHY regulator\n"); 118 return (error); 119 } 120 } 121 122 return (0); 123 } 124 125 static int 126 a20_if_dwc_mii_clk(device_t dev) 127 { 128 129 return (GMAC_MII_CLK_150_250M_DIV102); 130 } 131 132 static device_method_t a20_dwc_methods[] = { 133 DEVMETHOD(device_probe, a20_if_dwc_probe), 134 135 DEVMETHOD(if_dwc_init, a20_if_dwc_init), 136 DEVMETHOD(if_dwc_mii_clk, a20_if_dwc_mii_clk), 137 138 DEVMETHOD_END 139 }; 140 141 extern driver_t dwc_driver; 142 143 DEFINE_CLASS_1(dwc, a20_dwc_driver, a20_dwc_methods, sizeof(struct dwc_softc), 144 dwc_driver); 145 DRIVER_MODULE(a20_dwc, simplebus, a20_dwc_driver, 0, 0); 146 147 MODULE_DEPEND(a20_dwc, dwc, 1, 1, 1); 148