1/* $NetBSD: sdhc_cardbus.c,v 1.5 2012/12/20 14:37:00 jakllsch Exp $ */
2
3/*
4 * Copyright (c) 2010 NONAKA Kimihiro <nonaka@netbsd.org>
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: sdhc_cardbus.c,v 1.5 2012/12/20 14:37:00 jakllsch Exp $");
30
31#ifdef _KERNEL_OPT
32#include "opt_sdmmc.h"
33#endif
34
35#include <sys/param.h>
36#include <sys/device.h>
37#include <sys/systm.h>
38#include <sys/malloc.h>
39#include <sys/pmf.h>
40
41#include <dev/cardbus/cardbusvar.h>
42#include <dev/pci/pcidevs.h>
43
44#include <dev/sdmmc/sdhcreg.h>
45#include <dev/sdmmc/sdhcvar.h>
46#include <dev/sdmmc/sdmmcvar.h>
47
48/* PCI interface classes */
49#define SDHC_PCI_INTERFACE_NO_DMA 0x00
50#define SDHC_PCI_INTERFACE_DMA 0x01
51#define SDHC_PCI_INTERFACE_VENDOR 0x02
52
53/*
54 * 8-bit PCI configuration register that tells us how many slots there
55 * are and which BAR entry corresponds to the first slot.
56 */
57#define SDHC_PCI_CONF_SLOT_INFO 0x40
58#define SDHC_PCI_NUM_SLOTS(info) ((((info) >> 4) & 0x7) + 1)
59#define SDHC_PCI_FIRST_BAR(info) ((info) & 0x7)
60
61struct sdhc_cardbus_softc {
62 struct sdhc_softc sc;
63 cardbus_chipset_tag_t sc_cc;
64 cardbus_function_tag_t sc_cf;
65 cardbus_devfunc_t sc_ct;
66 pcitag_t sc_tag;
67 bus_space_tag_t sc_iot; /* CardBus I/O space tag */
68 bus_space_tag_t sc_memt; /* CardBus MEM space tag */
69
70 void *sc_ih;
71};
72
73static int sdhc_cardbus_match(device_t, cfdata_t, void *);
74static void sdhc_cardbus_attach(device_t, device_t, void *);
75static int sdhc_cardbus_detach(device_t, int);
76
77CFATTACH_DECL_NEW(sdhc_cardbus, sizeof(struct sdhc_cardbus_softc),
78 sdhc_cardbus_match, sdhc_cardbus_attach, sdhc_cardbus_detach, NULL);
79
80#ifdef SDHC_DEBUG
81#define DPRINTF(s) printf s
82#else
83#define DPRINTF(s) /**/
84#endif
85
86static int
87sdhc_cardbus_match(device_t parent, cfdata_t cf, void *aux)
88{
89 struct cardbus_attach_args *ca = aux;
90
91 if (PCI_CLASS(ca->ca_class) == PCI_CLASS_SYSTEM &&
92 PCI_SUBCLASS(ca->ca_class) == PCI_SUBCLASS_SYSTEM_SDHC)
93 return 3;
94
95 return 0;
96}
97
98static void
99sdhc_cardbus_attach(device_t parent, device_t self, void *aux)
100{
101 struct sdhc_cardbus_softc *sc = device_private(self);
102 struct cardbus_attach_args *ca = aux;
103 cardbus_devfunc_t ct = ca->ca_ct;
104 cardbus_chipset_tag_t cc = ct->ct_cc;
105 cardbus_function_tag_t cf = ct->ct_cf;
106 pcireg_t csr;
107 pcireg_t slotinfo;
108 char devinfo[256];
109 int nslots;
110 bus_space_tag_t iot;
111 bus_space_handle_t ioh;
112 bus_size_t size;
113
114 sc->sc.sc_dev = self;
115 sc->sc.sc_dmat = ca->ca_dmat;
116 sc->sc.sc_host = NULL;
117
118 sc->sc_cc = cc;
119 sc->sc_cf = cf;
120 sc->sc_ct = ct;
121 sc->sc_tag = ca->ca_tag;
122
123 sc->sc_iot = ca->ca_iot;
124 sc->sc_memt = ca->ca_memt;
125
126 pci_devinfo(ca->ca_id, ca->ca_class, 0, devinfo, sizeof(devinfo));
127 aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
128 PCI_REVISION(ca->ca_class));
129 aprint_naive("\n");
130
131 /*
132 * Map and attach all hosts supported by the host controller.
133 */
134 slotinfo = Cardbus_conf_read(ct, ca->ca_tag, SDHC_PCI_CONF_SLOT_INFO);
135 nslots = SDHC_PCI_NUM_SLOTS(slotinfo);
136 KASSERT(nslots == 1);
137
138 /* Allocate an array big enough to hold all the possible hosts */
139 sc->sc.sc_host = malloc(sizeof(struct sdhc_host *) * nslots,
140 M_DEVBUF, M_NOWAIT | M_ZERO);
141 if (sc->sc.sc_host == NULL) {
142 aprint_error_dev(self, "couldn't alloc memory\n");
143 goto err;
144 }
145
146 /* Enable the device. */
147 csr = Cardbus_conf_read(ct, ca->ca_tag, PCI_COMMAND_STATUS_REG);
148 Cardbus_conf_write(ct, ca->ca_tag, PCI_COMMAND_STATUS_REG,
149 csr | PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE);
150
151 /* Establish the interrupt. */
152 sc->sc_ih = Cardbus_intr_establish(ct, IPL_SDMMC, sdhc_intr, &sc->sc);
153 if (sc->sc_ih == NULL) {
154 aprint_error_dev(self, "couldn't establish interrupt\n");
155 goto err;
156 }
157
158 /* Enable use of DMA if supported by the interface. */
159 if ((PCI_INTERFACE(ca->ca_class) == SDHC_PCI_INTERFACE_DMA))
160 SET(sc->sc.sc_flags, SDHC_FLAG_USE_DMA);
161
162 if (Cardbus_mapreg_map(ct, PCI_MAPREG_START, PCI_MAPREG_TYPE_MEM, 0,
163 &iot, &ioh, NULL, &size)) {
164 aprint_error_dev(self, "couldn't map register\n");
165 goto err;
166 }
167
168 if (sdhc_host_found(&sc->sc, iot, ioh, size) != 0) {
169 aprint_error_dev(self, "couldn't initialize host\n");
170 goto err;
171 }
172
173 if (!pmf_device_register1(self, sdhc_suspend, sdhc_resume,
174 sdhc_shutdown)) {
175 aprint_error_dev(self, "couldn't establish powerhook\n");
176 }
177
178 return;
179
180err:
181 if (sc->sc_ih != NULL)
182 Cardbus_intr_disestablish(ct, sc->sc_ih);
183 if (sc->sc.sc_host != NULL)
184 free(sc->sc.sc_host, M_DEVBUF);
185}
186
187static int
188sdhc_cardbus_detach(device_t self, int flags)
189{
190 struct sdhc_cardbus_softc *sc = device_private(self);
191 struct cardbus_devfunc *ct = sc->sc_ct;
192 int rv;
193
194 rv = sdhc_detach(&sc->sc, flags);
195 if (rv)
196 return rv;
197 if (sc->sc_ih != NULL) {
198 Cardbus_intr_disestablish(ct, sc->sc_ih);
199 sc->sc_ih = NULL;
200 }
201 if (sc->sc.sc_host != NULL) {
202 free(sc->sc.sc_host, M_DEVBUF);
203 sc->sc.sc_host = NULL;
204 }
205 return 0;
206}
207