if_an_pci.c revision 119277 
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
33/*
34 * This is a PCI shim for the Aironet PC4500/4800 wireless network
35 * driver. Aironet makes PCMCIA, ISA and PCI versions of these devices,
36 * which all have basically the same interface. The ISA and PCI cards
37 * are actually bridge adapters with PCMCIA cards inserted into them,
38 * however they appear as normal PCI or ISA devices to the host.
39 *
40 * All we do here is handle the PCI probe and attach and set up an
41 * interrupt handler entry point. The PCI version of the card uses
42 * a PLX 9050 PCI to "dumb bus" bridge chip, which provides us with
43 * multiple PCI address space mappings. The primary mapping at PCI
44 * register 0x14 is for the PLX chip itself, *NOT* the Aironet card.
45 * The I/O address of the Aironet is actually at register 0x18, which
46 * is the local bus mapping register for bus space 0. There are also
47 * registers for additional register spaces at registers 0x1C and
48 * 0x20, but these are unused in the Aironet devices. To find out
49 * more, you need a datasheet for the 9050 from PLX, but you have
50 * to go through their sales office to get it. Bleh.
51 */
52
53#include <sys/cdefs.h>
54__FBSDID("$FreeBSD: head/sys/dev/an/if_an_pci.c 119277 2003-08-22 05:54:52Z imp $");
55
56#include "opt_inet.h"
57
58#ifdef INET
59#define ANCACHE
60#endif
61
62#include <sys/param.h>
63#include <sys/systm.h>
64#include <sys/sockio.h>
65#include <sys/mbuf.h>
66#include <sys/kernel.h>
67#include <sys/socket.h>
68
69#include <sys/module.h>
70#include <sys/bus.h>
71#include <machine/bus.h>
72#include <sys/rman.h>
73#include <sys/lock.h>
74#include <sys/mutex.h>
75#include <machine/resource.h>
76
77#include <net/if.h>
78#include <net/if_arp.h>
79#include <net/ethernet.h>
80#include <net/if_dl.h>
81#include <net/if_media.h>
82
83#include <dev/pci/pcireg.h>
84#include <dev/pci/pcivar.h>
85
86#include <dev/an/if_aironet_ieee.h>
87#include <dev/an/if_anreg.h>
88
89struct an_type {
90	u_int16_t		an_vid;
91	u_int16_t		an_did;
92	char			*an_name;
93};
94
95#define AIRONET_VENDORID	0x14B9
96#define AIRONET_DEVICEID_35x	0x0350
97#define AIRONET_DEVICEID_4500	0x4500
98#define AIRONET_DEVICEID_4800	0x4800
99#define AIRONET_DEVICEID_4xxx	0x0001
100#define AIRONET_DEVICEID_MPI350	0xA504
101#define AN_PCI_PLX_LOIO		0x14	/* PLX chip iobase */
102#define AN_PCI_LOIO		0x18	/* Aironet iobase */
103
104static struct an_type an_devs[] = {
105	{ AIRONET_VENDORID, AIRONET_DEVICEID_35x, "Cisco Aironet 350 Series" },
106	{ AIRONET_VENDORID, AIRONET_DEVICEID_4500, "Aironet PCI4500" },
107	{ AIRONET_VENDORID, AIRONET_DEVICEID_4800, "Aironet PCI4800" },
108	{ AIRONET_VENDORID, AIRONET_DEVICEID_4xxx, "Aironet PCI4500/PCI4800" },
109	{ 0, 0, NULL }
110};
111
112static int an_probe_pci		(device_t);
113static int an_attach_pci	(device_t);
114static int an_detach_pci	(device_t);
115static int an_suspend_pci	(device_t);
116static int an_resume_pci	(device_t);
117
118static int
119an_probe_pci(device_t dev)
120{
121	struct an_type		*t;
122
123	t = an_devs;
124
125	while (t->an_name != NULL) {
126		if (pci_get_vendor(dev) == t->an_vid &&
127		    pci_get_device(dev) == t->an_did) {
128			device_set_desc(dev, t->an_name);
129			return(0);
130		}
131		t++;
132	}
133
134	if (pci_get_vendor(dev) == AIRONET_VENDORID &&
135	    pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
136		device_set_desc(dev, "Cisco Aironet MPI350");
137		return(0);
138	}
139
140	return(ENXIO);
141}
142
143static int
144an_attach_pci(dev)
145	device_t		dev;
146{
147	u_int32_t		command;
148	struct an_softc		*sc;
149	int 			unit, flags, error = 0;
150
151	sc = device_get_softc(dev);
152	unit = device_get_unit(dev);
153	flags = device_get_flags(dev);
154	bzero(sc, sizeof(struct an_softc));
155
156	if (pci_get_vendor(dev) == AIRONET_VENDORID &&
157	    pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
158		sc->mpi350 = 1;
159		sc->port_rid = PCIR_MAPS;
160	} else {
161		/*
162		 * Map control/status registers.
163	 	 */
164		command = pci_read_config(dev, PCIR_COMMAND, 4);
165		command |= PCIM_CMD_PORTEN;
166		pci_write_config(dev, PCIR_COMMAND, command, 4);
167		command = pci_read_config(dev, PCIR_COMMAND, 4);
168
169		if (!(command & PCIM_CMD_PORTEN)) {
170			printf("an%d: failed to enable I/O ports!\n", unit);
171			error = ENXIO;
172			goto fail;
173		}
174		sc->port_rid = AN_PCI_LOIO;
175	}
176	error = an_alloc_port(dev, sc->port_rid, 1);
177
178	if (error) {
179		printf("an%d: couldn't map ports\n", unit);
180		goto fail;
181	}
182
183	sc->an_btag = rman_get_bustag(sc->port_res);
184	sc->an_bhandle = rman_get_bushandle(sc->port_res);
185
186	/* Allocate memory for MPI350 */
187	if (sc->mpi350) {
188		/* Allocate memory */
189		sc->mem_rid = PCIR_MAPS + 4;
190		error = an_alloc_memory(dev, sc->mem_rid, 1);
191		if (error) {
192			printf("an%d: couldn't map memory\n", unit);
193			goto fail;
194		}
195		sc->an_mem_btag = rman_get_bustag(sc->mem_res);
196		sc->an_mem_bhandle = rman_get_bushandle(sc->mem_res);
197
198		/* Allocate aux. memory */
199		sc->mem_aux_rid = PCIR_MAPS + 8;
200		error = an_alloc_aux_memory(dev, sc->mem_aux_rid,
201		    AN_AUX_MEM_SIZE);
202		if (error) {
203			printf("an%d: couldn't map aux memory\n", unit);
204			goto fail;
205		}
206		sc->an_mem_aux_btag = rman_get_bustag(sc->mem_aux_res);
207		sc->an_mem_aux_bhandle = rman_get_bushandle(sc->mem_aux_res);
208
209		/* Allocate DMA region */
210		error = bus_dma_tag_create(NULL,	/* parent */
211			       1, 0,			/* alignment, bounds */
212			       BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
213			       BUS_SPACE_MAXADDR,	/* highaddr */
214			       NULL, NULL,		/* filter, filterarg */
215			       0x3ffff,			/* maxsize XXX */
216			       1,			/* nsegments */
217			       0xffff,			/* maxsegsize XXX */
218			       BUS_DMA_ALLOCNOW,	/* flags */
219			       NULL,			/* lockfunc */
220			       NULL,			/* lockarg */
221			       &sc->an_dtag);
222		if (error) {
223			printf("an%d: couldn't get DMA region\n", unit);
224			goto fail;
225		}
226	}
227
228	/* Allocate interrupt */
229	error = an_alloc_irq(dev, 0, RF_SHAREABLE);
230	if (error) {
231		goto fail;
232        }
233
234	sc->an_dev = dev;
235	error = an_attach(sc, device_get_unit(dev), flags);
236	if (error) {
237		goto fail;
238	}
239
240	/*
241	 * Must setup the interrupt after the an_attach to prevent racing.
242	 */
243	error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
244	    an_intr, sc, &sc->irq_handle);
245
246fail:
247	if (error)
248		an_release_resources(dev);
249	return(error);
250}
251
252static int
253an_detach_pci(device_t dev)
254{
255	struct an_softc		*sc = device_get_softc(dev);
256	struct ifnet		*ifp = &sc->arpcom.ac_if;
257
258	an_stop(sc);
259	ifmedia_removeall(&sc->an_ifmedia);
260	ether_ifdetach(ifp);
261	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
262	an_release_resources(dev);
263
264	return (0);
265}
266
267static int
268an_suspend_pci(device_t dev)
269{
270	an_shutdown(dev);
271
272	return (0);
273}
274
275static int
276an_resume_pci(device_t dev)
277{
278	an_resume(dev);
279
280	return (0);
281}
282
283static device_method_t an_pci_methods[] = {
284        /* Device interface */
285        DEVMETHOD(device_probe,         an_probe_pci),
286        DEVMETHOD(device_attach,        an_attach_pci),
287	DEVMETHOD(device_detach,	an_detach_pci),
288	DEVMETHOD(device_shutdown,	an_shutdown),
289	DEVMETHOD(device_suspend,	an_suspend_pci),
290	DEVMETHOD(device_resume,	an_resume_pci),
291        { 0, 0 }
292};
293
294static driver_t an_pci_driver = {
295        "an",
296        an_pci_methods,
297        sizeof(struct an_softc),
298};
299
300static devclass_t an_devclass;
301
302DRIVER_MODULE(an, pci, an_pci_driver, an_devclass, 0, 0);
303MODULE_DEPEND(an, pci, 1, 1, 1);
304MODULE_DEPEND(an, wlan, 1, 1, 1);
305