1 /* $NetBSD: iop_pci.c,v 1.30 2018/12/09 11:14:02 jdolecek Exp $ */
2
3 /*-
4 * Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Doran.
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 front-end for `iop' driver.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: iop_pci.c,v 1.30 2018/12/09 11:14:02 jdolecek Exp $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/device.h>
43 #include <sys/queue.h>
44 #include <sys/proc.h>
45
46 #include <machine/endian.h>
47 #include <sys/bus.h>
48
49 #include <dev/pci/pcidevs.h>
50 #include <dev/pci/pcivar.h>
51
52 #include <dev/i2o/i2o.h>
53 #include <dev/i2o/iopreg.h>
54 #include <dev/i2o/iopio.h>
55 #include <dev/i2o/iopvar.h>
56
57 #define PCI_INTERFACE_I2O_POLLED 0x00
58 #define PCI_INTERFACE_I2O_INTRDRIVEN 0x01
59
60 static void iop_pci_attach(device_t, device_t, void *);
61 static int iop_pci_match(device_t, cfdata_t, void *);
62
63 CFATTACH_DECL_NEW(iop_pci, sizeof(struct iop_softc),
64 iop_pci_match, iop_pci_attach, NULL, NULL);
65
66 static int
iop_pci_match(device_t parent,cfdata_t match,void * aux)67 iop_pci_match(device_t parent, cfdata_t match, void *aux)
68 {
69 struct pci_attach_args *pa;
70 u_int product, vendor;
71 pcireg_t reg;
72
73 pa = aux;
74
75 /*
76 * Look for an "intelligent I/O processor" that adheres to the I2O
77 * specification. Ignore the device if it doesn't support interrupt
78 * driven operation.
79 */
80 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O &&
81 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD &&
82 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN)
83 return (1);
84
85 /*
86 * Match boards that don't conform exactly to the spec.
87 */
88 vendor = PCI_VENDOR(pa->pa_id);
89 product = PCI_PRODUCT(pa->pa_id);
90
91 if (vendor == PCI_VENDOR_DPT &&
92 (product == PCI_PRODUCT_DPT_RAID_I2O ||
93 product == PCI_PRODUCT_DPT_RAID_2005S))
94 return (1);
95
96 if (vendor == PCI_VENDOR_INTEL &&
97 (product == PCI_PRODUCT_INTEL_80960RM_2 ||
98 product == PCI_PRODUCT_INTEL_80960_RP)) {
99 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
100 if (PCI_VENDOR(reg) == PCI_VENDOR_PROMISE)
101 return (1);
102 }
103
104 return (0);
105 }
106
107 static void
iop_pci_attach(device_t parent,device_t self,void * aux)108 iop_pci_attach(device_t parent, device_t self, void *aux)
109 {
110 struct pci_attach_args *pa;
111 struct iop_softc *sc;
112 pci_chipset_tag_t pc;
113 pci_intr_handle_t ih;
114 const char *intrstr;
115 pcireg_t reg;
116 int i;
117 char intrbuf[PCI_INTRSTR_LEN];
118
119 sc = device_private(self);
120 sc->sc_dev = self;
121 pa = aux;
122 pc = pa->pa_pc;
123 printf(": ");
124
125 /*
126 * The kernel always uses the first memory mapping to communicate
127 * with the IOP.
128 */
129 for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) {
130 reg = pci_conf_read(pc, pa->pa_tag, i);
131 if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) {
132 sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg);
133 break;
134 }
135 }
136 if (i == PCI_MAPREG_END) {
137 aprint_error("can't find mapping\n");
138 return;
139 }
140
141 /* Map the register window. */
142 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot,
143 &sc->sc_ioh, NULL, NULL)) {
144 aprint_error_dev(self, "can't map register window\n");
145 return;
146 }
147
148 /* Map the 2nd register window. */
149 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DPT &&
150 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DPT_RAID_2005S) {
151 i += 4; /* next BAR */
152 if (i == PCI_MAPREG_END) {
153 aprint_error("can't find mapping\n");
154 return;
155 }
156
157 #if 0
158 /* Should we check it? (see FreeBSD's asr driver) */
159 reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
160 printf("subid %x, %x\n", PCI_VENDOR(reg), PCI_PRODUCT(reg));
161 #endif
162 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0,
163 &sc->sc_msg_iot, &sc->sc_msg_ioh, NULL, NULL)) {
164 aprint_error_dev(self,
165 "can't map 2nd register window\n");
166 return;
167 }
168 } else {
169 /* iop devices other than 2005S */
170 sc->sc_msg_iot = sc->sc_iot;
171 sc->sc_msg_ioh = sc->sc_ioh;
172 }
173
174 sc->sc_pcibus = pa->pa_bus;
175 sc->sc_pcidev = pa->pa_device;
176 sc->sc_dmat = pa->pa_dmat;
177 sc->sc_bus_memt = pa->pa_memt;
178 sc->sc_bus_iot = pa->pa_iot;
179
180 /* Enable the device. */
181 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
182 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
183 reg | PCI_COMMAND_MASTER_ENABLE);
184
185 /* Map and establish the interrupt.. */
186 if (pci_intr_map(pa, &ih)) {
187 aprint_error("can't map interrupt\n");
188 return;
189 }
190 intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf));
191 sc->sc_ih = pci_intr_establish_xname(pc, ih, IPL_BIO, iop_intr, sc,
192 device_xname(self));
193 if (sc->sc_ih == NULL) {
194 aprint_error("can't establish interrupt");
195 if (intrstr != NULL)
196 aprint_error(" at %s", intrstr);
197 aprint_error("\n");
198 return;
199 }
200
201 /* Attach to the bus-independent code. */
202 iop_init(sc, intrstr);
203 }
204