Annotation of sys/dev/pci/if_hme_pci.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: if_hme_pci.c,v 1.12 2006/12/21 22:13:36 jason Exp $ */
2: /* $NetBSD: if_hme_pci.c,v 1.3 2000/12/28 22:59:13 sommerfeld Exp $ */
3:
4: /*
5: * Copyright (c) 2000 Matthew R. Green
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24: * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26: * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: /*
33: * PCI front-end device driver for the HME ethernet device.
34: */
35:
36: #include <sys/param.h>
37: #include <sys/systm.h>
38: #include <sys/syslog.h>
39: #include <sys/device.h>
40: #include <sys/malloc.h>
41: #include <sys/socket.h>
42:
43: #include <net/if.h>
44: #include <net/if_dl.h>
45: #include <net/if_media.h>
46:
47: #ifdef INET
48: #include <netinet/in.h>
49: #include <netinet/in_systm.h>
50: #include <netinet/in_var.h>
51: #include <netinet/ip.h>
52: #include <netinet/if_ether.h>
53: #endif
54:
55: #include <dev/mii/mii.h>
56: #include <dev/mii/miivar.h>
57:
58: #ifdef __sparc64__
59: #include <machine/autoconf.h>
60: #include <dev/ofw/openfirm.h>
61: #endif
62: #include <machine/cpu.h>
63:
64: #include <dev/pci/pcivar.h>
65: #include <dev/pci/pcireg.h>
66: #include <dev/pci/pcidevs.h>
67:
68: #include <dev/ic/hmevar.h>
69:
70: struct hme_pci_softc {
71: struct hme_softc hsc_hme; /* HME device */
72: bus_space_tag_t hsc_memt;
73: bus_space_handle_t hsc_memh;
74: void *hsc_ih;
75: };
76:
77: int hmematch_pci(struct device *, void *, void *);
78: void hmeattach_pci(struct device *, struct device *, void *);
79: int hme_pci_enaddr(struct hme_softc *, struct pci_attach_args *);
80:
81: struct cfattach hme_pci_ca = {
82: sizeof(struct hme_pci_softc), hmematch_pci, hmeattach_pci
83: };
84:
85: int
86: hmematch_pci(parent, vcf, aux)
87: struct device *parent;
88: void *vcf;
89: void *aux;
90: {
91: struct pci_attach_args *pa = aux;
92:
93: if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
94: PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_HME)
95: return (1);
96:
97: return (0);
98: }
99:
100: #define PCI_EBUS2_BOOTROM 0x10
101: #define PROMHDR_PTR_DATA 0x18
102: #define PROMDATA_PTR_VPD 0x08
103: #define PROMDATA_DATA2 0x0a
104:
105: static const u_int8_t hme_promhdr[] = { 0x55, 0xaa };
106: static const u_int8_t hme_promdat[] = {
107: 'P', 'C', 'I', 'R',
108: PCI_VENDOR_SUN & 0xff, PCI_VENDOR_SUN >> 8,
109: PCI_PRODUCT_SUN_HME & 0xff, PCI_PRODUCT_SUN_HME >> 8
110: };
111: static const u_int8_t hme_promdat2[] = {
112: 0x18, 0x00, /* structure length */
113: 0x00, /* structure revision */
114: 0x00, /* interface revision */
115: PCI_SUBCLASS_NETWORK_ETHERNET, /* subclass code */
116: PCI_CLASS_NETWORK /* class code */
117: };
118:
119: int
120: hme_pci_enaddr(struct hme_softc *sc, struct pci_attach_args *hpa)
121: {
122: struct pci_attach_args epa;
123: struct pci_vpd *vpd;
124: pcireg_t cl, id;
125: bus_space_handle_t romh;
126: bus_space_tag_t romt;
127: bus_size_t romsize = 0;
128: u_int8_t buf[32];
129: int dataoff, vpdoff;
130:
131: /*
132: * Dig out VPD (vital product data) and acquire Ethernet address.
133: * The VPD of hme resides in the Boot PROM (PCI FCode) attached
134: * to the EBus interface.
135: * ``Writing FCode 3.x Programs'' (newer ones, dated 1997 and later)
136: * chapter 2 describes the data structure.
137: */
138:
139: /* get a PCI tag for the EBus bridge (function 0 of the same device) */
140: epa = *hpa;
141: epa.pa_tag = pci_make_tag(hpa->pa_pc, hpa->pa_bus, hpa->pa_device, 0);
142: cl = pci_conf_read(epa.pa_pc, epa.pa_tag, PCI_CLASS_REG);
143: id = pci_conf_read(epa.pa_pc, epa.pa_tag, PCI_ID_REG);
144:
145: if (PCI_CLASS(cl) != PCI_CLASS_BRIDGE ||
146: PCI_PRODUCT(id) != PCI_PRODUCT_SUN_EBUS)
147: goto fail;
148:
149: if (pci_mapreg_map(&epa, PCI_EBUS2_BOOTROM, PCI_MAPREG_TYPE_MEM, 0,
150: &romt, &romh, 0, &romsize, 0))
151: goto fail;
152:
153: bus_space_read_region_1(romt, romh, 0, buf, sizeof(buf));
154: if (bcmp(buf, hme_promhdr, sizeof(hme_promhdr)))
155: goto fail;
156:
157: dataoff = buf[PROMHDR_PTR_DATA] | (buf[PROMHDR_PTR_DATA + 1] << 8);
158: if (dataoff < 0x1c)
159: goto fail;
160:
161: bus_space_read_region_1(romt, romh, dataoff, buf, sizeof(buf));
162: if (bcmp(buf, hme_promdat, sizeof(hme_promdat)) ||
163: bcmp(buf + PROMDATA_DATA2, hme_promdat2, sizeof(hme_promdat2)))
164: goto fail;
165:
166: vpdoff = buf[PROMDATA_PTR_VPD] | (buf[PROMDATA_PTR_VPD + 1] << 8);
167: if (vpdoff < 0x1c)
168: goto fail;
169:
170: /*
171: * The VPD of hme is not in PCI 2.2 standard format. The length
172: * in the resource header is in big endian, and resources are not
173: * properly terminated (only one resource and no end tag).
174: */
175: bus_space_read_region_1(romt, romh, vpdoff, buf, sizeof(buf));
176:
177: /* XXX TODO: Get the data from VPD */
178: vpd = (struct pci_vpd *)(buf + 3);
179: if (!PCI_VPDRES_ISLARGE(buf[0]) ||
180: PCI_VPDRES_LARGE_NAME(buf[0]) != PCI_VPDRES_TYPE_VPD)
181: goto fail;
182: if (vpd->vpd_key0 != 'N' || vpd->vpd_key1 != 'A')
183: goto fail;
184:
185: bcopy(buf + 6, sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
186: sc->sc_arpcom.ac_enaddr[5] += hpa->pa_device;
187: bus_space_unmap(romt, romh, romsize);
188: return (0);
189:
190: fail:
191: if (romsize != 0)
192: bus_space_unmap(romt, romh, romsize);
193: return (-1);
194: }
195:
196: void
197: hmeattach_pci(parent, self, aux)
198: struct device *parent, *self;
199: void *aux;
200: {
201: struct pci_attach_args *pa = aux;
202: struct hme_pci_softc *hsc = (void *)self;
203: struct hme_softc *sc = &hsc->hsc_hme;
204: pci_intr_handle_t ih;
205: /* XXX the following declarations should be elsewhere */
206: extern void myetheraddr(u_char *);
207: pcireg_t csr;
208: const char *intrstr = NULL;
209: bus_size_t size;
210: int type, gotenaddr = 0;
211:
212: /*
213: * enable io/memory-space accesses. this is kinda of gross; but
214: * the hme comes up with neither IO space enabled, or memory space.
215: */
216: if (pa->pa_memt)
217: pa->pa_flags |= PCI_FLAGS_MEM_ENABLED;
218: if (pa->pa_iot)
219: pa->pa_flags |= PCI_FLAGS_IO_ENABLED;
220: csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
221: if (pa->pa_memt) {
222: type = PCI_MAPREG_TYPE_MEM;
223: csr |= PCI_COMMAND_MEM_ENABLE;
224: sc->sc_bustag = pa->pa_memt;
225: } else {
226: type = PCI_MAPREG_TYPE_IO;
227: csr |= PCI_COMMAND_IO_ENABLE;
228: sc->sc_bustag = pa->pa_iot;
229: }
230: pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
231: csr | PCI_COMMAND_MEM_ENABLE);
232:
233: sc->sc_dmatag = pa->pa_dmat;
234:
235: sc->sc_pci = 1; /* XXXXX should all be done in bus_dma. */
236: /*
237: * Map five register banks:
238: *
239: * bank 0: HME SEB registers: +0x0000
240: * bank 1: HME ETX registers: +0x2000
241: * bank 2: HME ERX registers: +0x4000
242: * bank 3: HME MAC registers: +0x6000
243: * bank 4: HME MIF registers: +0x7000
244: *
245: */
246:
247: #define PCI_HME_BASEADDR 0x10
248: if (pci_mapreg_map(pa, PCI_HME_BASEADDR, type, 0,
249: &hsc->hsc_memt, &hsc->hsc_memh, NULL, &size, 0) != 0) {
250: printf(": could not map hme registers\n");
251: return;
252: }
253: sc->sc_seb = hsc->hsc_memh;
254: bus_space_subregion(sc->sc_bustag, hsc->hsc_memh, 0x2000, 0x2000,
255: &sc->sc_etx);
256: bus_space_subregion(sc->sc_bustag, hsc->hsc_memh, 0x4000, 0x2000,
257: &sc->sc_erx);
258: bus_space_subregion(sc->sc_bustag, hsc->hsc_memh, 0x6000, 0x1000,
259: &sc->sc_mac);
260: bus_space_subregion(sc->sc_bustag, hsc->hsc_memh, 0x7000, 0x1000,
261: &sc->sc_mif);
262:
263: if (hme_pci_enaddr(sc, pa) == 0)
264: gotenaddr = 1;
265:
266: #ifdef __sparc64__
267: if (!gotenaddr) {
268: if (OF_getprop(PCITAG_NODE(pa->pa_tag), "local-mac-address",
269: sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN) <= 0)
270: myetheraddr(sc->sc_arpcom.ac_enaddr);
271: gotenaddr = 1;
272: }
273: #endif
274: #ifdef __powerpc__
275: if (!gotenaddr) {
276: pci_ether_hw_addr(pa->pa_pc, sc->sc_arpcom.ac_enaddr);
277: gotenaddr = 1;
278: }
279: #endif
280:
281: sc->sc_burst = 16; /* XXX */
282:
283: if (pci_intr_map(pa, &ih) != 0) {
284: printf(": couldn't map interrupt\n");
285: bus_space_unmap(hsc->hsc_memt, hsc->hsc_memh, size);
286: return;
287: }
288: intrstr = pci_intr_string(pa->pa_pc, ih);
289: hsc->hsc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_NET,
290: hme_intr, sc, self->dv_xname);
291: if (hsc->hsc_ih == NULL) {
292: printf(": couldn't establish interrupt");
293: if (intrstr != NULL)
294: printf(" at %s", intrstr);
295: printf("\n");
296: bus_space_unmap(hsc->hsc_memt, hsc->hsc_memh, size);
297: return;
298: }
299:
300: printf(": %s", intrstr);
301:
302: /*
303: * call the main configure
304: */
305: hme_config(sc);
306: }
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