if_an_pci.c revision 111051 
1/*
2 * Copyright (c) 1997, 1998, 1999
3 *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * $FreeBSD: head/sys/dev/an/if_an_pci.c 111051 2003-02-17 19:57:32Z imp $
33 */
34
35/*
36 * This is a PCI shim for the Aironet PC4500/4800 wireless network
37 * driver. Aironet makes PCMCIA, ISA and PCI versions of these devices,
38 * which all have basically the same interface. The ISA and PCI cards
39 * are actually bridge adapters with PCMCIA cards inserted into them,
40 * however they appear as normal PCI or ISA devices to the host.
41 *
42 * All we do here is handle the PCI probe and attach and set up an
43 * interrupt handler entry point. The PCI version of the card uses
44 * a PLX 9050 PCI to "dumb bus" bridge chip, which provides us with
45 * multiple PCI address space mappings. The primary mapping at PCI
46 * register 0x14 is for the PLX chip itself, *NOT* the Aironet card.
47 * The I/O address of the Aironet is actually at register 0x18, which
48 * is the local bus mapping register for bus space 0. There are also
49 * registers for additional register spaces at registers 0x1C and
50 * 0x20, but these are unused in the Aironet devices. To find out
51 * more, you need a datasheet for the 9050 from PLX, but you have
52 * to go through their sales office to get it. Bleh.
53 */
54
55#include "opt_inet.h"
56
57#ifdef INET
58#define ANCACHE
59#endif
60
61#include <sys/param.h>
62#include <sys/systm.h>
63#include <sys/sockio.h>
64#include <sys/mbuf.h>
65#include <sys/kernel.h>
66#include <sys/socket.h>
67
68#include <sys/module.h>
69#include <sys/bus.h>
70#include <machine/bus.h>
71#include <sys/rman.h>
72#include <sys/lock.h>
73#include <sys/mutex.h>
74#include <machine/resource.h>
75
76#include <net/if.h>
77#include <net/if_arp.h>
78#include <net/ethernet.h>
79#include <net/if_dl.h>
80#include <net/if_media.h>
81
82#include <pci/pcireg.h>
83#include <pci/pcivar.h>
84
85#ifndef lint
86static const char rcsid[] =
87 "$FreeBSD: head/sys/dev/an/if_an_pci.c 111051 2003-02-17 19:57:32Z imp $";
88#endif
89
90#include <dev/an/if_aironet_ieee.h>
91#include <dev/an/if_anreg.h>
92
93struct an_type {
94	u_int16_t		an_vid;
95	u_int16_t		an_did;
96	char			*an_name;
97};
98
99#define AIRONET_VENDORID	0x14B9
100#define AIRONET_DEVICEID_35x	0x0350
101#define AIRONET_DEVICEID_4500	0x4500
102#define AIRONET_DEVICEID_4800	0x4800
103#define AIRONET_DEVICEID_4xxx	0x0001
104#define AIRONET_DEVICEID_MPI350	0xA504
105#define AN_PCI_PLX_LOIO		0x14	/* PLX chip iobase */
106#define AN_PCI_LOIO		0x18	/* Aironet iobase */
107
108static struct an_type an_devs[] = {
109	{ AIRONET_VENDORID, AIRONET_DEVICEID_35x, "Cisco Aironet 350 Series" },
110	{ AIRONET_VENDORID, AIRONET_DEVICEID_4500, "Aironet PCI4500" },
111	{ AIRONET_VENDORID, AIRONET_DEVICEID_4800, "Aironet PCI4800" },
112	{ AIRONET_VENDORID, AIRONET_DEVICEID_4xxx, "Aironet PCI4500/PCI4800" },
113	{ 0, 0, NULL }
114};
115
116static int an_probe_pci		(device_t);
117static int an_attach_pci	(device_t);
118static int an_detach_pci	(device_t);
119static int an_suspend_pci	(device_t);
120static int an_resume_pci	(device_t);
121
122static int
123an_probe_pci(device_t dev)
124{
125	struct an_type		*t;
126
127	t = an_devs;
128
129	while (t->an_name != NULL) {
130		if (pci_get_vendor(dev) == t->an_vid &&
131		    pci_get_device(dev) == t->an_did) {
132			device_set_desc(dev, t->an_name);
133			return(0);
134		}
135		t++;
136	}
137
138	if (pci_get_vendor(dev) == AIRONET_VENDORID &&
139	    pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
140		device_set_desc(dev, "Cisco Aironet MPI350");
141		return(0);
142	}
143
144	return(ENXIO);
145}
146
147static int
148an_attach_pci(dev)
149	device_t		dev;
150{
151	u_int32_t		command;
152	struct an_softc		*sc;
153	int 			unit, flags, error = 0;
154
155	sc = device_get_softc(dev);
156	unit = device_get_unit(dev);
157	flags = device_get_flags(dev);
158	bzero(sc, sizeof(struct an_softc));
159
160	if (pci_get_vendor(dev) == AIRONET_VENDORID &&
161	    pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
162		sc->mpi350 = 1;
163		sc->port_rid = PCIR_MAPS;
164	} else {
165		/*
166		 * Map control/status registers.
167	 	 */
168		command = pci_read_config(dev, PCIR_COMMAND, 4);
169		command |= PCIM_CMD_PORTEN;
170		pci_write_config(dev, PCIR_COMMAND, command, 4);
171		command = pci_read_config(dev, PCIR_COMMAND, 4);
172
173		if (!(command & PCIM_CMD_PORTEN)) {
174			printf("an%d: failed to enable I/O ports!\n", unit);
175			error = ENXIO;
176			goto fail;
177		}
178		sc->port_rid = AN_PCI_LOIO;
179	}
180	error = an_alloc_port(dev, sc->port_rid, 1);
181
182	if (error) {
183		printf("an%d: couldn't map ports\n", unit);
184		goto fail;
185	}
186
187	sc->an_btag = rman_get_bustag(sc->port_res);
188	sc->an_bhandle = rman_get_bushandle(sc->port_res);
189
190	/* Allocate memory for MPI350 */
191	if (sc->mpi350) {
192		/* Allocate memory */
193		sc->mem_rid = PCIR_MAPS + 4;
194		error = an_alloc_memory(dev, sc->mem_rid, 1);
195		if (error) {
196			printf("an%d: couldn't map memory\n", unit);
197			goto fail;
198		}
199		sc->an_mem_btag = rman_get_bustag(sc->mem_res);
200		sc->an_mem_bhandle = rman_get_bushandle(sc->mem_res);
201
202		/* Allocate aux. memory */
203		sc->mem_aux_rid = PCIR_MAPS + 8;
204		error = an_alloc_aux_memory(dev, sc->mem_aux_rid,
205		    AN_AUXMEMSIZE);
206		if (error) {
207			printf("an%d: couldn't map aux memory\n", unit);
208			goto fail;
209		}
210		sc->an_mem_aux_btag = rman_get_bustag(sc->mem_aux_res);
211		sc->an_mem_aux_bhandle = rman_get_bushandle(sc->mem_aux_res);
212
213		/* Allocate DMA region */
214		error = bus_dma_tag_create(NULL,	/* parent */
215			       1, 0,			/* alignment, bounds */
216			       BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
217			       BUS_SPACE_MAXADDR,	/* highaddr */
218			       NULL, NULL,		/* filter, filterarg */
219			       0x3ffff,			/* maxsize XXX */
220			       1,			/* nsegments */
221			       0xffff,			/* maxsegsize XXX */
222			       BUS_DMA_ALLOCNOW,	/* flags */
223			       &sc->an_dtag);
224		if (error) {
225			printf("an%d: couldn't get DMA region\n", unit);
226			goto fail;
227		}
228	}
229
230	/* Allocate interrupt */
231	error = an_alloc_irq(dev, 0, RF_SHAREABLE);
232	if (error) {
233		goto fail;
234        }
235
236	error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
237	    an_intr, sc, &sc->irq_handle);
238	if (error) {
239		goto fail;
240	}
241
242	sc->an_dev = dev;
243	error = an_attach(sc, device_get_unit(dev), flags);
244
245fail:
246	if (error)
247		an_release_resources(dev);
248	return(error);
249}
250
251static int
252an_detach_pci(device_t dev)
253{
254	struct an_softc		*sc = device_get_softc(dev);
255	struct ifnet		*ifp = &sc->arpcom.ac_if;
256
257	an_stop(sc);
258	ifmedia_removeall(&sc->an_ifmedia);
259	ether_ifdetach(ifp);
260	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
261	an_release_resources(dev);
262
263	return (0);
264}
265
266static int
267an_suspend_pci(device_t dev)
268{
269	an_shutdown(dev);
270
271	return (0);
272}
273
274static int
275an_resume_pci(device_t dev)
276{
277	an_resume(dev);
278
279	return (0);
280}
281
282static device_method_t an_pci_methods[] = {
283        /* Device interface */
284        DEVMETHOD(device_probe,         an_probe_pci),
285        DEVMETHOD(device_attach,        an_attach_pci),
286	DEVMETHOD(device_detach,	an_detach_pci),
287	DEVMETHOD(device_shutdown,	an_shutdown),
288	DEVMETHOD(device_suspend,	an_suspend_pci),
289	DEVMETHOD(device_resume,	an_resume_pci),
290        { 0, 0 }
291};
292
293static driver_t an_pci_driver = {
294        "an",
295        an_pci_methods,
296        sizeof(struct an_softc),
297};
298
299static devclass_t an_devclass;
300
301DRIVER_MODULE(if_an, pci, an_pci_driver, an_devclass, 0, 0);
302MODULE_DEPEND(if_an, wlan, 1, 1, 1);
303