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 | |
61 | struct 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 | |
73 | static int sdhc_cardbus_match(device_t, cfdata_t, void *); |
74 | static void sdhc_cardbus_attach(device_t, device_t, void *); |
75 | static int sdhc_cardbus_detach(device_t, int); |
76 | |
77 | CFATTACH_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 | |
86 | static int |
87 | sdhc_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 | |
98 | static void |
99 | sdhc_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 | |
180 | err: |
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 | |
187 | static int |
188 | sdhc_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 | |