if_mtd_pci.c revision 1.22 
1/* $NetBSD: if_mtd_pci.c,v 1.22 2021/05/08 00:27:02 thorpej Exp $ */
2
3/*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Peter Bex <Peter.Bex@student.kun.nl>.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * PCI interface for MTD803 cards
34 * Written by Peter Bex (peter.bex@student.kun.nl)
35 */
36
37/* TODO: Check why in IO space, the MII won't work. Memory mapped works */
38
39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: if_mtd_pci.c,v 1.22 2021/05/08 00:27:02 thorpej Exp $");
41
42#include <sys/param.h>
43#include <sys/device.h>
44#include <sys/systm.h>
45#include <sys/socket.h>
46#include <net/if.h>
47#include <net/if_ether.h>
48#include <net/if_media.h>
49#include <sys/bus.h>
50#include <dev/mii/miivar.h>
51#include <dev/ic/mtd803reg.h>
52#include <dev/ic/mtd803var.h>
53#include <dev/pci/pcidevs.h>
54#include <dev/pci/pcireg.h>
55#include <dev/pci/pcivar.h>
56
57#define PCI_IO_MAP_REG PCI_BAR(0)
58#define PCI_MEM_MAP_REG PCI_BAR(1)
59
60static const struct device_compatible_entry compat_data[] = {
61	{ .id = PCI_ID_CODE(PCI_VENDOR_MYSON, PCI_PRODUCT_MYSON_MTD803) },
62
63	PCI_COMPAT_EOL
64};
65
66static int	mtd_pci_match(device_t, cfdata_t, void *);
67static void	mtd_pci_attach(device_t, device_t, void *);
68
69CFATTACH_DECL_NEW(mtd_pci, sizeof(struct mtd_softc), mtd_pci_match,
70    mtd_pci_attach, NULL, NULL);
71
72static int
73mtd_pci_match(device_t parent, cfdata_t match, void *aux)
74{
75	struct pci_attach_args *pa = aux;
76
77	return pci_compatible_match(pa, compat_data);
78}
79
80static void
81mtd_pci_attach(device_t parent, device_t self, void *aux)
82{
83	struct pci_attach_args * const pa = aux;
84	struct mtd_softc * const sc = device_private(self);
85	pci_intr_handle_t ih;
86	const char *intrstring = NULL;
87	bus_space_tag_t iot, memt;
88	bus_space_handle_t ioh, memh;
89	int io_valid, mem_valid;
90	char intrbuf[PCI_INTRSTR_LEN];
91
92	sc->dev = self;
93	pci_aprint_devinfo(pa, NULL);
94
95	io_valid = (pci_mapreg_map(pa, PCI_IO_MAP_REG, PCI_MAPREG_TYPE_IO,
96			0, &iot, &ioh, NULL, NULL) == 0);
97	mem_valid = (pci_mapreg_map(pa, PCI_MEM_MAP_REG, PCI_MAPREG_TYPE_MEM
98			| PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh,
99			NULL, NULL) == 0);
100
101	if (mem_valid) {
102		sc->bus_tag = memt;
103		sc->bus_handle = memh;
104	} else if (io_valid) {
105		sc->bus_tag = iot;
106		sc->bus_handle = ioh;
107	} else {
108		aprint_error_dev(sc->dev,
109		    "could not map memory or i/o space\n");
110		return;
111	}
112	sc->dma_tag = pa->pa_dmat;
113
114	/* Do generic attach. Seems this must be done before setting IRQ */
115	mtd_config(sc);
116
117	if (pci_intr_map(pa, &ih)) {
118		aprint_error_dev(sc->dev, "could not map interrupt\n");
119		return;
120	}
121	intrstring = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf));
122
123	if (pci_intr_establish_xname(pa->pa_pc, ih, IPL_NET, mtd_irq_h, sc,
124	    device_xname(self)) == NULL) {
125		aprint_error_dev(sc->dev, "could not establish interrupt");
126		if (intrstring != NULL)
127			aprint_error(" at %s", intrstring);
128		aprint_error("\n");
129		return;
130	} else {
131		aprint_normal_dev(sc->dev, "using %s for interrupt\n",
132			intrstring ? intrstring : "unknown interrupt");
133	}
134}
135