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 #include <sys/cdefs.h>
36 * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver.
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/module.h>
42 #include <sys/kernel.h>
44 #include <sys/mutex.h>
45 #include <sys/errno.h>
49 #include <sys/socket.h>
52 #include <net/if_media.h>
53 #include <net/if_arp.h>
55 #include <netproto/802_11/ieee80211_var.h>
57 #include <dev/netif/ath/ath/if_athvar.h>
59 #include <bus/pci/pcivar.h>
60 #include <bus/pci/pcireg.h>
66 struct ath_pci_softc {
67 struct ath_softc sc_sc;
68 struct resource *sc_sr; /* memory resource */
69 struct resource *sc_irq; /* irq resource */
70 void *sc_ih; /* interrupt handler */
74 #define PCIR_RETRY_TIMEOUT 0x41
77 ath_pci_probe(device_t dev)
81 wlan_serialize_enter();
82 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev));
83 if (devname != NULL) {
84 device_set_desc(dev, devname);
85 wlan_serialize_exit();
86 return BUS_PROBE_DEFAULT;
88 wlan_serialize_exit();
93 ath_pci_attach(device_t dev)
95 struct ath_pci_softc *psc = device_get_softc(dev);
96 struct ath_softc *sc = &psc->sc_sc;
100 wlan_serialize_enter();
104 * Enable bus mastering.
106 pci_enable_busmaster(dev);
109 * Disable retry timeout to keep PCI Tx retries from
110 * interfering with C3 CPU state.
112 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1);
115 * Setup memory-mapping of PCI registers.
118 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
120 if (psc->sc_sr == NULL) {
121 device_printf(dev, "cannot map register space\n");
124 /* XXX uintptr_t is a bandaid for ia64; to be fixed */
125 sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
126 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
128 * Mark device invalid so any interrupts (shared or otherwise)
129 * that arrive before the HAL is setup are discarded.
134 * Arrange interrupt line.
137 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
138 RF_SHAREABLE|RF_ACTIVE);
139 if (psc->sc_irq == NULL) {
140 device_printf(dev, "could not map interrupt\n");
143 if (bus_setup_intr(dev, psc->sc_irq,
145 ath_intr, sc, &psc->sc_ih,
146 &wlan_global_serializer)) {
147 device_printf(dev, "could not establish interrupt\n");
152 * Setup DMA descriptor area.
154 if (bus_dma_tag_create(sc->sc_dmat, /* parent */
155 1, 0, /* alignment, bounds */
156 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
157 BUS_SPACE_MAXADDR, /* highaddr */
158 NULL, NULL, /* filter, filterarg */
159 0x3ffff, /* maxsize XXX */
160 ATH_MAX_SCATTER, /* nsegments */
161 0x3ffff, /* maxsegsize XXX */
162 BUS_DMA_ALLOCNOW, /* flags */
164 device_printf(dev, "cannot allocate DMA tag\n");
168 error = ath_attach(pci_get_device(dev), sc);
169 if (error == 0) { /* success */
170 wlan_serialize_exit();
174 bus_dma_tag_destroy(sc->sc_dmat);
176 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
178 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
180 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
182 wlan_serialize_exit();
187 ath_pci_detach(device_t dev)
189 struct ath_pci_softc *psc = device_get_softc(dev);
190 struct ath_softc *sc = &psc->sc_sc;
192 wlan_serialize_enter();
193 /* check if device was removed */
194 sc->sc_invalid = !bus_child_present(dev);
198 bus_generic_detach(dev);
199 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
200 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
202 bus_dma_tag_destroy(sc->sc_dmat);
203 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
205 wlan_serialize_exit();
210 ath_pci_shutdown(device_t dev)
212 struct ath_pci_softc *psc = device_get_softc(dev);
214 wlan_serialize_enter();
215 ath_shutdown(&psc->sc_sc);
216 wlan_serialize_exit();
221 ath_pci_suspend(device_t dev)
223 struct ath_pci_softc *psc = device_get_softc(dev);
225 wlan_serialize_enter();
226 ath_suspend(&psc->sc_sc);
227 wlan_serialize_exit();
233 ath_pci_resume(device_t dev)
235 struct ath_pci_softc *psc = device_get_softc(dev);
237 wlan_serialize_enter();
238 ath_resume(&psc->sc_sc);
239 wlan_serialize_exit();
244 static device_method_t ath_pci_methods[] = {
245 /* Device interface */
246 DEVMETHOD(device_probe, ath_pci_probe),
247 DEVMETHOD(device_attach, ath_pci_attach),
248 DEVMETHOD(device_detach, ath_pci_detach),
249 DEVMETHOD(device_shutdown, ath_pci_shutdown),
250 DEVMETHOD(device_suspend, ath_pci_suspend),
251 DEVMETHOD(device_resume, ath_pci_resume),
255 static driver_t ath_pci_driver = {
258 sizeof (struct ath_pci_softc)
260 static devclass_t ath_devclass;
261 DRIVER_MODULE(ath, pci, ath_pci_driver, ath_devclass, 0, 0);
262 MODULE_VERSION(ath, 1);
264 MODULE_DEPEND(ath, ath_hal, 1, 1, 1); /* Atheros HAL */
265 MODULE_DEPEND(ath, ath_rate, 1, 1, 1); /* rate control algorithm */
266 MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */