1 /* $NetBSD: cycv_gmac.c,v 1.7 2024/08/10 12:16:46 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* Taken from sunxi_gmac.c */ 30 31 #include <sys/cdefs.h> 32 33 __KERNEL_RCSID(0, "$NetBSD: cycv_gmac.c,v 1.7 2024/08/10 12:16:46 skrll Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 #include <sys/intr.h> 39 #include <sys/systm.h> 40 #include <sys/gpio.h> 41 #include <sys/rndsource.h> 42 43 #include <net/if.h> 44 #include <net/if_ether.h> 45 #include <net/if_media.h> 46 47 #include <dev/mii/miivar.h> 48 49 #include <dev/ic/dwc_gmac_var.h> 50 #include <dev/ic/dwc_gmac_reg.h> 51 52 #include <dev/fdt/fdtvar.h> 53 54 static const struct device_compatible_entry compat_data[] = { 55 { .compat = "altr,socfpga-stmmac" }, 56 DEVICE_COMPAT_EOL 57 }; 58 59 static int 60 cycv_gmac_intr(void *arg) 61 { 62 return dwc_gmac_intr(arg); 63 } 64 65 static int 66 cycv_gmac_match(device_t parent, cfdata_t cf, void *aux) 67 { 68 struct fdt_attach_args * const faa = aux; 69 70 return of_compatible_match(faa->faa_phandle, compat_data); 71 } 72 73 static void 74 cycv_gmac_attach(device_t parent, device_t self, void *aux) 75 { 76 struct dwc_gmac_softc * const sc = device_private(self); 77 struct fdt_attach_args * const faa = aux; 78 const int phandle = faa->faa_phandle; 79 struct clk *clk_gmac; 80 struct fdtbus_reset *rst_gmac; 81 const char *phy_mode; 82 char intrstr[128]; 83 bus_addr_t addr; 84 bus_size_t size; 85 86 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 87 aprint_error(": couldn't get registers\n"); 88 return; 89 } 90 91 sc->sc_dev = self; 92 sc->sc_bst = faa->faa_bst; 93 if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { 94 aprint_error(": couldn't map registers\n"); 95 return; 96 } 97 sc->sc_dmat = faa->faa_dmat; 98 99 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof intrstr)) { 100 aprint_error(": failed to decode interrupt\n"); 101 return; 102 } 103 104 clk_gmac = fdtbus_clock_get(phandle, "stmmaceth"); 105 if (clk_gmac == NULL) { 106 aprint_error(": couldn't get clock\n"); 107 return; 108 } 109 110 rst_gmac = fdtbus_reset_get(phandle, "stmmaceth"); 111 if (rst_gmac == NULL) { 112 aprint_error(": couldn't get reset\n"); 113 return; 114 } 115 116 phy_mode = fdtbus_get_string(phandle, "phy-mode"); 117 if (phy_mode == NULL) { 118 aprint_error(": missing 'phy-mode' property\n"); 119 return; 120 } 121 122 if (clk_enable(clk_gmac) != 0) { 123 aprint_error(": couldn't enable clocks\n"); 124 return; 125 } 126 127 if (rst_gmac != NULL && fdtbus_reset_deassert(rst_gmac) != 0) { 128 aprint_error(": couldn't de-assert reset\n"); 129 return; 130 } 131 132 aprint_naive("\n"); 133 aprint_normal(": GMAC\n"); 134 135 if (fdtbus_intr_establish_xname(phandle, 0, IPL_NET, FDT_INTR_MPSAFE, 136 cycv_gmac_intr, sc, device_xname(sc->sc_dev)) == NULL) { 137 aprint_error_dev(self, "failed to establish interrupt on %s\n", 138 intrstr); 139 return; 140 } 141 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 142 143 dwc_gmac_attach(sc, MII_PHY_ANY, GMAC_MII_CLK_150_250M_DIV102); 144 } 145 146 CFATTACH_DECL_NEW(cycv_gmac, sizeof(struct dwc_gmac_softc), 147 cycv_gmac_match, cycv_gmac_attach, NULL, NULL); 148