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ingenic_dme.c revision 1.1 
      1 /*	$NetBSD: ingenic_dme.c,v 1.1 2015/03/10 18:15:47 macallan Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2015 Michael Lorenz
      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 __KERNEL_RCSID(0, "$NetBSD: ingenic_dme.c,v 1.1 2015/03/10 18:15:47 macallan Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/device.h>
     35 #include <sys/mutex.h>
     36 #include <sys/bus.h>
     37 #include <sys/workqueue.h>
     38 
     39 #include <mips/ingenic/ingenic_var.h>
     40 #include <mips/ingenic/ingenic_regs.h>
     41 
     42 #include <net/if.h>
     43 #include <net/if_ether.h>
     44 #include <net/if_media.h>
     45 
     46 #include <dev/ic/dm9000var.h>
     47 #include <dev/ic/dm9000reg.h>
     48 
     49 #include "opt_ingenic.h"
     50 
     51 static int ingenic_dme_match(device_t, struct cfdata *, void *);
     52 static void ingenic_dme_attach(device_t, device_t, void *);
     53 static int ingenic_dme_intr(void *);
     54 
     55 CFATTACH_DECL_NEW(ingenic_dme, sizeof(struct dme_softc),
     56     ingenic_dme_match, ingenic_dme_attach, NULL, NULL);
     57 
     58 #define GPIO_DME_INT		19
     59 #define GPIO_DME_INT_MASK	(1 << GPIO_DME_INT)
     60 
     61 /* ARGSUSED */
     62 static int
     63 ingenic_dme_match(device_t parent, struct cfdata *match, void *aux)
     64 {
     65 	struct apbus_attach_args *aa = aux;
     66 
     67 	if (strcmp(aa->aa_name, "dme") != 0)
     68 		return 0;
     69 
     70 	return 1;
     71 }
     72 
     73 /* ARGSUSED */
     74 static void
     75 ingenic_dme_attach(device_t parent, device_t self, void *aux)
     76 {
     77 	struct dme_softc *sc = device_private(self);
     78 	struct apbus_attach_args *aa = aux;
     79 	void *ih;
     80 	static uint8_t enaddr[ETHER_ADDR_LEN];
     81 	int error;
     82 
     83 	sc->sc_dev = self;
     84 
     85 	sc->sc_iot = aa->aa_bst;
     86 	sc->dme_io = JZ_DME_IO;
     87 	sc->dme_data = JZ_DME_DATA;
     88 	sc->sc_phy_initialized = 0;
     89 
     90 	if (aa->aa_addr == 0)
     91 		aa->aa_addr = JZ_DME_BASE;
     92 
     93 	error = bus_space_map(aa->aa_bst, aa->aa_addr, 4, 0, &sc->sc_ioh);
     94 	if (error) {
     95 		aprint_error_dev(self,
     96 		    "can't map registers for %s: %d\n", aa->aa_name, error);
     97 		return;
     98 	}
     99 
    100 	aprint_naive(": DM9000 Ethernet controller\n");
    101 	aprint_normal(": DM9000 Ethernet controller\n");
    102 
    103 
    104 	/* make sure the chip is powered up and not in reset */
    105 	gpio_as_output(1, 25);
    106 	gpio_set(1, 25, 1);
    107 	gpio_as_output(5, 12);
    108 	gpio_set(5, 12, 1);
    109 
    110 	/* setup pins to talk to the chip */
    111 	gpio_as_dev0(1, 1);
    112 	gpio_as_dev0(0, 0);
    113 	gpio_as_dev0(0, 1);
    114 	gpio_as_dev0(0, 2);
    115 	gpio_as_dev0(0, 3);
    116 	gpio_as_dev0(0, 4);
    117 	gpio_as_dev0(0, 5);
    118 	gpio_as_dev0(0, 6);
    119 	gpio_as_dev0(0, 7);
    120 
    121 	gpio_as_dev0(0, 16);
    122 	gpio_as_dev0(0, 17);
    123 	gpio_as_dev0(0, 26);
    124 
    125 	/* DM9000 interrupt is on GPIO E pin 19 */
    126 	gpio_as_intr_level(4, GPIO_DME_INT);
    127 	ih = evbmips_intr_establish(13, ingenic_dme_intr, sc);
    128 
    129 		if (ih == NULL) {
    130 		aprint_error_dev(self, "failed to establish interrupt %d\n",
    131 		     13);
    132 		goto fail;
    133 	}
    134 
    135 	/*
    136 	 * XXX grab MAC address set by uboot
    137 	 * I'm not sure uboot will program the MAC address into the chip when
    138 	 * not netbooting, so this needs to go away
    139 	 */
    140 	dme_read_c(sc, DM9000_PAB0, enaddr, 6);
    141 	dme_attach(sc, enaddr);
    142 	return;
    143 fail:
    144 	if (ih) {
    145 		evbmips_intr_disestablish(ih);
    146 	}
    147 	bus_space_unmap(sc->sc_iot, sc->sc_ioh, 4);
    148 }
    149 
    150 static int
    151 ingenic_dme_intr(void *arg)
    152 {
    153 	uint32_t reg;
    154 	int ret = 0;
    155 
    156 	/* see if it's us */
    157 	reg = readreg(JZ_GPIO_E_BASE + JZ_GPIO_FLAG);
    158 	if (reg & GPIO_DME_INT_MASK) {
    159 		/* yes, it's ours, handle it... */
    160 		ret = dme_intr(arg);
    161 		/* ... and clear it */
    162 		writereg(JZ_GPIO_E_BASE + JZ_GPIO_FLAGC, GPIO_DME_INT_MASK);
    163 	}
    164 	return ret;
    165 }
    166