2 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 * redistribution must be conditioned upon including a substantially
14 * similar Disclaimer requirement for further binary redistribution.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver.
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/module.h>
40 #include <sys/kernel.h>
42 #include <sys/mutex.h>
43 #include <sys/errno.h>
45 #include <machine/bus.h>
46 #include <machine/resource.h>
50 #include <sys/socket.h>
53 #include <net/if_media.h>
54 #include <net/if_arp.h>
56 #include <net80211/ieee80211_var.h>
58 #include <dev/ath/if_athvar.h>
60 #include <dev/pci/pcivar.h>
61 #include <dev/pci/pcireg.h>
67 struct ath_pci_softc {
68 struct ath_softc sc_sc;
69 struct resource *sc_sr; /* memory resource */
70 struct resource *sc_irq; /* irq resource */
71 void *sc_ih; /* interrupt handler */
75 #define PCIR_RETRY_TIMEOUT 0x41
78 ath_pci_probe(device_t dev)
82 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev));
83 if (devname != NULL) {
84 device_set_desc(dev, devname);
85 return BUS_PROBE_DEFAULT;
91 ath_pci_setup(device_t dev)
96 * Enable memory mapping and bus mastering.
98 cmd = pci_read_config(dev, PCIR_COMMAND, 4);
99 cmd |= PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN;
100 pci_write_config(dev, PCIR_COMMAND, cmd, 4);
101 cmd = pci_read_config(dev, PCIR_COMMAND, 4);
102 if ((cmd & PCIM_CMD_MEMEN) == 0) {
103 device_printf(dev, "failed to enable memory mapping\n");
106 if ((cmd & PCIM_CMD_BUSMASTEREN) == 0) {
107 device_printf(dev, "failed to enable bus mastering\n");
112 * Disable retry timeout to keep PCI Tx retries from
113 * interfering with C3 CPU state.
115 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1);
121 ath_pci_attach(device_t dev)
123 struct ath_pci_softc *psc = device_get_softc(dev);
124 struct ath_softc *sc = &psc->sc_sc;
130 if (!ath_pci_setup(dev))
134 * Setup memory-mapping of PCI registers.
137 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
139 if (psc->sc_sr == NULL) {
140 device_printf(dev, "cannot map register space\n");
143 /* XXX uintptr_t is a bandaid for ia64; to be fixed */
144 sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
145 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
147 * Mark device invalid so any interrupts (shared or otherwise)
148 * that arrive before the HAL is setup are discarded.
153 * Arrange interrupt line.
156 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
157 RF_SHAREABLE|RF_ACTIVE);
158 if (psc->sc_irq == NULL) {
159 device_printf(dev, "could not map interrupt\n");
162 if (bus_setup_intr(dev, psc->sc_irq,
163 INTR_TYPE_NET | INTR_MPSAFE,
164 NULL, ath_intr, sc, &psc->sc_ih)) {
165 device_printf(dev, "could not establish interrupt\n");
170 * Setup DMA descriptor area.
172 if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
173 1, 0, /* alignment, bounds */
174 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
175 BUS_SPACE_MAXADDR, /* highaddr */
176 NULL, NULL, /* filter, filterarg */
177 0x3ffff, /* maxsize XXX */
178 ATH_MAX_SCATTER, /* nsegments */
179 0x3ffff, /* maxsegsize XXX */
180 BUS_DMA_ALLOCNOW, /* flags */
184 device_printf(dev, "cannot allocate DMA tag\n");
190 error = ath_attach(pci_get_device(dev), sc);
191 if (error == 0) /* success */
194 ATH_LOCK_DESTROY(sc);
195 bus_dma_tag_destroy(sc->sc_dmat);
197 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
199 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
201 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
207 ath_pci_detach(device_t dev)
209 struct ath_pci_softc *psc = device_get_softc(dev);
210 struct ath_softc *sc = &psc->sc_sc;
212 /* check if device was removed */
213 sc->sc_invalid = !bus_child_present(dev);
217 bus_generic_detach(dev);
218 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
219 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
221 bus_dma_tag_destroy(sc->sc_dmat);
222 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
224 ATH_LOCK_DESTROY(sc);
230 ath_pci_shutdown(device_t dev)
232 struct ath_pci_softc *psc = device_get_softc(dev);
234 ath_shutdown(&psc->sc_sc);
239 ath_pci_suspend(device_t dev)
241 struct ath_pci_softc *psc = device_get_softc(dev);
243 ath_suspend(&psc->sc_sc);
249 ath_pci_resume(device_t dev)
251 struct ath_pci_softc *psc = device_get_softc(dev);
253 if (!ath_pci_setup(dev))
256 ath_resume(&psc->sc_sc);
261 static device_method_t ath_pci_methods[] = {
262 /* Device interface */
263 DEVMETHOD(device_probe, ath_pci_probe),
264 DEVMETHOD(device_attach, ath_pci_attach),
265 DEVMETHOD(device_detach, ath_pci_detach),
266 DEVMETHOD(device_shutdown, ath_pci_shutdown),
267 DEVMETHOD(device_suspend, ath_pci_suspend),
268 DEVMETHOD(device_resume, ath_pci_resume),
272 static driver_t ath_pci_driver = {
275 sizeof (struct ath_pci_softc)
277 static devclass_t ath_devclass;
278 DRIVER_MODULE(if_ath, pci, ath_pci_driver, ath_devclass, 0, 0);
279 DRIVER_MODULE(if_ath, cardbus, ath_pci_driver, ath_devclass, 0, 0);
280 MODULE_VERSION(if_ath, 1);
281 MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */