2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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29 * $FreeBSD: head/sys/dev/ath/if_ath_pci.c 192147 2009-05-15 17:02:11Z imp $
33 * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver.
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/module.h>
39 #include <sys/kernel.h>
41 #include <sys/mutex.h>
42 #include <sys/errno.h>
46 #include <sys/socket.h>
49 #include <net/if_media.h>
50 #include <net/if_arp.h>
52 #include <netproto/802_11/ieee80211_var.h>
54 #include <dev/netif/ath/ath/if_athvar.h>
56 #include <bus/pci/pcivar.h>
57 #include <bus/pci/pcireg.h>
63 struct ath_pci_softc {
64 struct ath_softc sc_sc;
65 struct resource *sc_sr; /* memory resource */
66 struct resource *sc_irq; /* irq resource */
67 void *sc_ih; /* interrupt handler */
71 #define PCIR_RETRY_TIMEOUT 0x41
74 ath_pci_probe(device_t dev)
78 wlan_serialize_enter();
79 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev));
80 if (devname != NULL) {
81 device_set_desc(dev, devname);
82 wlan_serialize_exit();
83 return BUS_PROBE_DEFAULT;
85 wlan_serialize_exit();
90 ath_pci_attach(device_t dev)
92 struct ath_pci_softc *psc = device_get_softc(dev);
93 struct ath_softc *sc = &psc->sc_sc;
97 wlan_serialize_enter();
101 * Enable bus mastering.
103 pci_enable_busmaster(dev);
106 * Disable retry timeout to keep PCI Tx retries from
107 * interfering with C3 CPU state.
109 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1);
112 * Setup memory-mapping of PCI registers.
115 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
117 if (psc->sc_sr == NULL) {
118 device_printf(dev, "cannot map register space\n");
121 /* XXX uintptr_t is a bandaid for ia64; to be fixed */
122 sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
123 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
125 * Mark device invalid so any interrupts (shared or otherwise)
126 * that arrive before the HAL is setup are discarded.
131 * Arrange interrupt line.
134 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
135 RF_SHAREABLE|RF_ACTIVE);
136 if (psc->sc_irq == NULL) {
137 device_printf(dev, "could not map interrupt\n");
140 if (bus_setup_intr(dev, psc->sc_irq,
142 ath_intr, sc, &psc->sc_ih,
143 &wlan_global_serializer)) {
144 device_printf(dev, "could not establish interrupt\n");
149 * Setup DMA descriptor area.
151 if (bus_dma_tag_create(sc->sc_dmat, /* parent */
152 4, 0, /* alignment, bounds */
153 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
154 BUS_SPACE_MAXADDR, /* highaddr */
155 NULL, NULL, /* filter, filterarg */
156 0x3ffff, /* maxsize XXX */
157 ATH_MAX_SCATTER, /* nsegments */
158 0x3ffff, /* maxsegsize XXX */
159 BUS_DMA_ALLOCNOW, /* flags */
161 device_printf(dev, "cannot allocate DMA tag\n");
165 error = ath_attach(pci_get_device(dev), sc);
166 if (error == 0) { /* success */
167 wlan_serialize_exit();
171 bus_dma_tag_destroy(sc->sc_dmat);
173 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
175 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
177 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
179 wlan_serialize_exit();
184 ath_pci_detach(device_t dev)
186 struct ath_pci_softc *psc = device_get_softc(dev);
187 struct ath_softc *sc = &psc->sc_sc;
189 wlan_serialize_enter();
190 /* check if device was removed */
191 sc->sc_invalid = !bus_child_present(dev);
195 bus_generic_detach(dev);
196 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
197 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
199 bus_dma_tag_destroy(sc->sc_dmat);
200 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
202 wlan_serialize_exit();
207 ath_pci_shutdown(device_t dev)
209 struct ath_pci_softc *psc = device_get_softc(dev);
211 wlan_serialize_enter();
212 ath_shutdown(&psc->sc_sc);
213 wlan_serialize_exit();
218 ath_pci_suspend(device_t dev)
220 struct ath_pci_softc *psc = device_get_softc(dev);
222 wlan_serialize_enter();
223 ath_suspend(&psc->sc_sc);
224 wlan_serialize_exit();
230 ath_pci_resume(device_t dev)
232 struct ath_pci_softc *psc = device_get_softc(dev);
234 wlan_serialize_enter();
235 ath_resume(&psc->sc_sc);
236 wlan_serialize_exit();
241 static device_method_t ath_pci_methods[] = {
242 /* Device interface */
243 DEVMETHOD(device_probe, ath_pci_probe),
244 DEVMETHOD(device_attach, ath_pci_attach),
245 DEVMETHOD(device_detach, ath_pci_detach),
246 DEVMETHOD(device_shutdown, ath_pci_shutdown),
247 DEVMETHOD(device_suspend, ath_pci_suspend),
248 DEVMETHOD(device_resume, ath_pci_resume),
252 static driver_t ath_pci_driver = {
255 sizeof (struct ath_pci_softc)
257 static devclass_t ath_devclass;
258 DRIVER_MODULE(ath, pci, ath_pci_driver, ath_devclass, NULL, NULL);
259 MODULE_VERSION(ath, 1);
261 MODULE_DEPEND(ath, ath_hal, 1, 1, 1); /* Atheros HAL */
262 MODULE_DEPEND(ath, ath_rate, 1, 1, 1); /* rate control algorithm */
263 MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */