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      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 (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 /* 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