meson_dwmac.c revision 1.1.2.2
1 /* $NetBSD: meson_dwmac.c,v 1.1.2.2 2019/01/26 21:59:59 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill (at) 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 #include <sys/cdefs.h> 30 31 __KERNEL_RCSID(0, "$NetBSD: meson_dwmac.c,v 1.1.2.2 2019/01/26 21:59:59 pgoyette Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/device.h> 36 #include <sys/intr.h> 37 #include <sys/systm.h> 38 #include <sys/gpio.h> 39 40 #include <net/if.h> 41 #include <net/if_ether.h> 42 #include <net/if_media.h> 43 44 #include <dev/mii/miivar.h> 45 46 #include <dev/ic/dwc_gmac_var.h> 47 #include <dev/ic/dwc_gmac_reg.h> 48 49 #include <dev/fdt/fdtvar.h> 50 51 #define GMAC_TX_RATE_MII 25000000 52 #define GMAC_TX_RATE_RGMII 125000000 53 54 static const char * compatible[] = { 55 "amlogic,meson8b-dwmac", 56 NULL 57 }; 58 59 static int 60 meson_dwmac_reset(const int phandle) 61 { 62 #if notyet 63 struct fdtbus_gpio_pin *pin_reset; 64 const u_int *reset_delay_us; 65 bool reset_active_low; 66 int len, val; 67 68 pin_reset = fdtbus_gpio_acquire(phandle, "snps,reset-gpio", GPIO_PIN_OUTPUT); 69 if (pin_reset == NULL) 70 return 0; 71 72 reset_delay_us = fdtbus_get_prop(phandle, "snps,reset-delays-us", &len); 73 if (reset_delay_us == NULL || len != 12) 74 return ENXIO; 75 76 reset_active_low = of_hasprop(phandle, "snps,reset-active-low"); 77 78 val = reset_active_low ? 1 : 0; 79 80 fdtbus_gpio_write(pin_reset, val); 81 delay(be32toh(reset_delay_us[0])); 82 fdtbus_gpio_write(pin_reset, !val); 83 delay(be32toh(reset_delay_us[1])); 84 fdtbus_gpio_write(pin_reset, val); 85 delay(be32toh(reset_delay_us[2])); 86 #endif 87 88 return 0; 89 } 90 91 static int 92 meson_dwmac_intr(void *arg) 93 { 94 struct dwc_gmac_softc * const sc = arg; 95 96 return dwc_gmac_intr(sc); 97 } 98 99 static int 100 meson_dwmac_match(device_t parent, cfdata_t cf, void *aux) 101 { 102 struct fdt_attach_args * const faa = aux; 103 104 return of_match_compatible(faa->faa_phandle, compatible); 105 } 106 107 static void 108 meson_dwmac_attach(device_t parent, device_t self, void *aux) 109 { 110 struct dwc_gmac_softc * const sc = device_private(self); 111 struct fdt_attach_args * const faa = aux; 112 const int phandle = faa->faa_phandle; 113 struct fdtbus_reset *rst_gmac; 114 struct clk *clk_gmac; 115 const char *phy_mode; 116 char intrstr[128]; 117 bus_addr_t addr; 118 bus_size_t size; 119 120 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 121 aprint_error(": couldn't get registers\n"); 122 return; 123 } 124 125 sc->sc_dev = self; 126 sc->sc_bst = faa->faa_bst; 127 if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { 128 aprint_error(": couldn't map registers\n"); 129 return; 130 } 131 sc->sc_dmat = faa->faa_dmat; 132 133 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 134 aprint_error(": failed to decode interrupt\n"); 135 return; 136 } 137 138 clk_gmac = fdtbus_clock_get(phandle, "stmmaceth"); 139 if (clk_gmac == NULL) { 140 aprint_error(": couldn't get clocks\n"); 141 return; 142 } 143 144 rst_gmac = fdtbus_reset_get(phandle, "stmmaceth"); 145 146 phy_mode = fdtbus_get_string(phandle, "phy-mode"); 147 if (phy_mode == NULL) { 148 aprint_error(": missing 'phy-mode' property\n"); 149 return; 150 } 151 #if notyet 152 if (strcmp(phy_mode, "mii") == 0) { 153 if (clk_set_rate(clk_gmac_tx, GMAC_TX_RATE_MII) != 0) { 154 aprint_error(": failed to set TX clock rate (MII)\n"); 155 return; 156 } 157 } else if (strcmp(phy_mode, "rgmii") == 0) { 158 if (clk_set_rate(clk_gmac_tx, GMAC_TX_RATE_RGMII) != 0) { 159 aprint_error(": failed to set TX clock rate (RGMII)\n"); 160 return; 161 } 162 } else { 163 aprint_error(": unsupported phy-mode '%s'\n", phy_mode); 164 return; 165 } 166 #endif 167 168 if (clk_enable(clk_gmac) != 0) { 169 aprint_error(": couldn't enable clock\n"); 170 return; 171 } 172 173 if (rst_gmac != NULL && fdtbus_reset_deassert(rst_gmac) != 0) { 174 aprint_error(": couldn't de-assert reset\n"); 175 return; 176 } 177 178 aprint_naive("\n"); 179 aprint_normal(": Gigabit Ethernet Controller\n"); 180 181 if (fdtbus_intr_establish(phandle, 0, IPL_NET, 0, meson_dwmac_intr, sc) == NULL) { 182 aprint_error_dev(self, "failed to establish interrupt on %s\n", intrstr); 183 return; 184 } 185 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 186 187 if (meson_dwmac_reset(phandle) != 0) 188 aprint_error_dev(self, "PHY reset failed\n"); 189 190 dwc_gmac_attach(sc, GMAC_MII_CLK_100_150M_DIV62); 191 } 192 193 CFATTACH_DECL_NEW(meson_dwmac, sizeof(struct dwc_gmac_softc), 194 meson_dwmac_match, meson_dwmac_attach, NULL, NULL); 195
Indexes created Fri Oct 03 02:09:57 GMT 2025