1 | /* $NetBSD: if_epic_pci.c,v 1.41 2014/03/29 19:28:24 christos Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
9 | * NASA Ames Research Center. |
10 | * |
11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions |
13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 | * POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | |
33 | /* |
34 | * PCI bus front-end for the Standard Microsystems Corp. 83C170 |
35 | * Ethernet PCI Integrated Controller (EPIC/100) driver. |
36 | */ |
37 | |
38 | #include <sys/cdefs.h> |
39 | __KERNEL_RCSID(0, "$NetBSD: if_epic_pci.c,v 1.41 2014/03/29 19:28:24 christos Exp $" ); |
40 | |
41 | #include <sys/param.h> |
42 | #include <sys/systm.h> |
43 | #include <sys/mbuf.h> |
44 | #include <sys/malloc.h> |
45 | #include <sys/kernel.h> |
46 | #include <sys/socket.h> |
47 | #include <sys/ioctl.h> |
48 | #include <sys/errno.h> |
49 | #include <sys/device.h> |
50 | |
51 | #include <net/if.h> |
52 | #include <net/if_dl.h> |
53 | #include <net/if_media.h> |
54 | #include <net/if_ether.h> |
55 | |
56 | #include <sys/bus.h> |
57 | #include <sys/intr.h> |
58 | |
59 | #include <dev/mii/miivar.h> |
60 | |
61 | #include <dev/ic/smc83c170reg.h> |
62 | #include <dev/ic/smc83c170var.h> |
63 | |
64 | #include <dev/pci/pcivar.h> |
65 | #include <dev/pci/pcireg.h> |
66 | #include <dev/pci/pcidevs.h> |
67 | |
68 | /* |
69 | * PCI configuration space registers used by the EPIC. |
70 | */ |
71 | #define EPIC_PCI_IOBA PCI_BAR(0) /* i/o mapped base */ |
72 | #define EPIC_PCI_MMBA PCI_BAR(1) /* memory mapped base */ |
73 | |
74 | struct epic_pci_softc { |
75 | struct epic_softc sc_epic; /* real EPIC softc */ |
76 | |
77 | /* PCI-specific goo. */ |
78 | void *sc_ih; /* interrupt handle */ |
79 | }; |
80 | |
81 | static int epic_pci_match(device_t, cfdata_t, void *); |
82 | static void epic_pci_attach(device_t, device_t, void *); |
83 | |
84 | CFATTACH_DECL_NEW(epic_pci, sizeof(struct epic_pci_softc), |
85 | epic_pci_match, epic_pci_attach, NULL, NULL); |
86 | |
87 | static const struct epic_pci_product { |
88 | uint32_t epp_prodid; /* PCI product ID */ |
89 | const char *epp_name; /* device name */ |
90 | } epic_pci_products[] = { |
91 | { PCI_PRODUCT_SMC_83C170, "SMC 83c170 Fast Ethernet" }, |
92 | { PCI_PRODUCT_SMC_83C175, "SMC 83c175 Fast Ethernet" }, |
93 | { 0, NULL }, |
94 | }; |
95 | |
96 | static const struct epic_pci_product * |
97 | epic_pci_lookup(const struct pci_attach_args *pa) |
98 | { |
99 | const struct epic_pci_product *epp; |
100 | |
101 | if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_SMC) |
102 | return NULL; |
103 | |
104 | for (epp = epic_pci_products; epp->epp_name != NULL; epp++) |
105 | if (PCI_PRODUCT(pa->pa_id) == epp->epp_prodid) |
106 | return epp; |
107 | |
108 | return NULL; |
109 | } |
110 | |
111 | static const struct epic_pci_subsys_info { |
112 | pcireg_t subsysid; |
113 | int flags; |
114 | } epic_pci_subsys_info[] = { |
115 | { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa015), /* SMC9432BTX */ |
116 | EPIC_HAS_BNC }, |
117 | { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa024), /* SMC9432BTX1 */ |
118 | EPIC_HAS_BNC }, |
119 | { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa016), /* SMC9432FTX */ |
120 | EPIC_HAS_MII_FIBER | EPIC_DUPLEXLED_ON_694 }, |
121 | { 0xffffffff, |
122 | 0 } |
123 | }; |
124 | |
125 | static const struct epic_pci_subsys_info * |
126 | epic_pci_subsys_lookup(const struct pci_attach_args *pa) |
127 | { |
128 | pci_chipset_tag_t pc = pa->pa_pc; |
129 | pcireg_t reg; |
130 | const struct epic_pci_subsys_info *esp; |
131 | |
132 | reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG); |
133 | |
134 | for (esp = epic_pci_subsys_info; esp->subsysid != 0xffffffff; esp++) |
135 | if (esp->subsysid == reg) |
136 | return esp; |
137 | |
138 | return NULL; |
139 | } |
140 | |
141 | static int |
142 | epic_pci_match(device_t parent, cfdata_t cf, void *aux) |
143 | { |
144 | struct pci_attach_args *pa = aux; |
145 | |
146 | if (epic_pci_lookup(pa) != NULL) |
147 | return 1; |
148 | |
149 | return 0; |
150 | } |
151 | |
152 | static void |
153 | epic_pci_attach(device_t parent, device_t self, void *aux) |
154 | { |
155 | struct epic_pci_softc *psc = device_private(self); |
156 | struct epic_softc *sc = &psc->sc_epic; |
157 | struct pci_attach_args *pa = aux; |
158 | pci_chipset_tag_t pc = pa->pa_pc; |
159 | pci_intr_handle_t ih; |
160 | const char *intrstr = NULL; |
161 | const struct epic_pci_product *epp; |
162 | const struct epic_pci_subsys_info *esp; |
163 | bus_space_tag_t iot, memt; |
164 | bus_space_handle_t ioh, memh; |
165 | int ioh_valid, memh_valid; |
166 | int error; |
167 | char intrbuf[PCI_INTRSTR_LEN]; |
168 | |
169 | sc->sc_dev = self; |
170 | |
171 | epp = epic_pci_lookup(pa); |
172 | if (epp == NULL) { |
173 | aprint_normal("\n" ); |
174 | panic("%s: impossible" , __func__); |
175 | } |
176 | |
177 | pci_aprint_devinfo_fancy(pa, "Ethernet controller" , epp->epp_name, 1); |
178 | |
179 | /* power up chip */ |
180 | if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self, |
181 | NULL)) && error != EOPNOTSUPP) { |
182 | aprint_error_dev(self, "cannot activate %d\n" , error); |
183 | return; |
184 | } |
185 | |
186 | /* |
187 | * Map the device. |
188 | */ |
189 | ioh_valid = (pci_mapreg_map(pa, EPIC_PCI_IOBA, |
190 | PCI_MAPREG_TYPE_IO, 0, |
191 | &iot, &ioh, NULL, NULL) == 0); |
192 | memh_valid = (pci_mapreg_map(pa, EPIC_PCI_MMBA, |
193 | PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, |
194 | &memt, &memh, NULL, NULL) == 0); |
195 | |
196 | if (memh_valid) { |
197 | sc->sc_st = memt; |
198 | sc->sc_sh = memh; |
199 | } else if (ioh_valid) { |
200 | sc->sc_st = iot; |
201 | sc->sc_sh = ioh; |
202 | } else { |
203 | aprint_error_dev(self, "unable to map device registers\n" ); |
204 | return; |
205 | } |
206 | |
207 | sc->sc_dmat = pa->pa_dmat; |
208 | |
209 | /* Make sure bus mastering is enabled. */ |
210 | pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, |
211 | pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) | |
212 | PCI_COMMAND_MASTER_ENABLE); |
213 | |
214 | /* |
215 | * Map and establish our interrupt. |
216 | */ |
217 | if (pci_intr_map(pa, &ih)) { |
218 | aprint_error_dev(self, "unable to map interrupt\n" ); |
219 | return; |
220 | } |
221 | intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf)); |
222 | psc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, epic_intr, sc); |
223 | if (psc->sc_ih == NULL) { |
224 | aprint_error_dev(self, "unable to establish interrupt" ); |
225 | if (intrstr != NULL) |
226 | aprint_error(" at %s" , intrstr); |
227 | aprint_error("\n" ); |
228 | return; |
229 | } |
230 | aprint_normal_dev(self, "interrupting at %s\n" , intrstr); |
231 | |
232 | esp = epic_pci_subsys_lookup(pa); |
233 | if (esp) |
234 | sc->sc_hwflags = esp->flags; |
235 | |
236 | /* |
237 | * Finish off the attach. |
238 | */ |
239 | epic_attach(sc); |
240 | } |
241 | |