aw_if_dwc.c revision 303975
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__FBSDID("$FreeBSD: releng/11.0/sys/arm/allwinner/aw_if_dwc.c 298422 2016-04-21 16:49:04Z jmcneill $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34#include <sys/module.h> 35 36#include <machine/bus.h> 37 38#include <dev/dwc/if_dwc.h> 39#include <dev/dwc/if_dwcvar.h> 40#include <dev/ofw/ofw_bus.h> 41#include <dev/ofw/ofw_bus_subr.h> 42 43#include <arm/allwinner/allwinner_machdep.h> 44#include <dev/extres/clk/clk.h> 45#include <dev/extres/regulator/regulator.h> 46 47#include "if_dwc_if.h" 48 49static int 50a20_if_dwc_probe(device_t dev) 51{ 52 53 if (!ofw_bus_status_okay(dev)) 54 return (ENXIO); 55 if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-gmac")) 56 return (ENXIO); 57 device_set_desc(dev, "A20 Gigabit Ethernet Controller"); 58 59 return (BUS_PROBE_DEFAULT); 60} 61 62static int 63a20_if_dwc_init(device_t dev) 64{ 65 const char *tx_parent_name; 66 char *phy_type; 67 clk_t clk_tx, clk_tx_parent; 68 regulator_t reg; 69 phandle_t node; 70 int error; 71 72 node = ofw_bus_get_node(dev); 73 74 /* Configure PHY for MII or RGMII mode */ 75 if (OF_getprop_alloc(node, "phy-mode", 1, (void **)&phy_type)) { 76 error = clk_get_by_ofw_name(dev, "allwinner_gmac_tx", &clk_tx); 77 if (error != 0) { 78 device_printf(dev, "could not get tx clk\n"); 79 return (error); 80 } 81 82 if (strcmp(phy_type, "rgmii") == 0) 83 tx_parent_name = "gmac_int_tx"; 84 else 85 tx_parent_name = "mii_phy_tx"; 86 87 error = clk_get_by_name(dev, tx_parent_name, &clk_tx_parent); 88 if (error != 0) { 89 device_printf(dev, "could not get clock '%s'\n", 90 tx_parent_name); 91 return (error); 92 } 93 94 error = clk_set_parent_by_clk(clk_tx, clk_tx_parent); 95 if (error != 0) { 96 device_printf(dev, "could not set tx clk parent\n"); 97 return (error); 98 } 99 } 100 101 /* Enable PHY regulator if applicable */ 102 if (regulator_get_by_ofw_property(dev, "phy-supply", ®) == 0) { 103 error = regulator_enable(reg); 104 if (error != 0) { 105 device_printf(dev, "could not enable PHY regulator\n"); 106 return (error); 107 } 108 } 109 110 return (0); 111} 112 113static int 114a20_if_dwc_mac_type(device_t dev) 115{ 116 117 return (DWC_GMAC_ALT_DESC); 118} 119 120static int 121a20_if_dwc_mii_clk(device_t dev) 122{ 123 124 return (GMAC_MII_CLK_150_250M_DIV102); 125} 126 127static device_method_t a20_dwc_methods[] = { 128 DEVMETHOD(device_probe, a20_if_dwc_probe), 129 130 DEVMETHOD(if_dwc_init, a20_if_dwc_init), 131 DEVMETHOD(if_dwc_mac_type, a20_if_dwc_mac_type), 132 DEVMETHOD(if_dwc_mii_clk, a20_if_dwc_mii_clk), 133 134 DEVMETHOD_END 135}; 136 137static devclass_t a20_dwc_devclass; 138 139extern driver_t dwc_driver; 140 141DEFINE_CLASS_1(dwc, a20_dwc_driver, a20_dwc_methods, sizeof(struct dwc_softc), 142 dwc_driver); 143DRIVER_MODULE(a20_dwc, simplebus, a20_dwc_driver, a20_dwc_devclass, 0, 0); 144 145MODULE_DEPEND(a20_dwc, dwc, 1, 1, 1); 146