2 * Copyright (c) 2008 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <linux/nl80211.h>
18 #include <linux/pci.h>
21 static struct pci_device_id ath_pci_id_table[] __devinitdata = {
22 { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI */
23 { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
24 { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI */
25 { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI */
26 { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
27 { PCI_VDEVICE(ATHEROS, 0x002B) }, /* PCI-E */
31 /* return bus cachesize in 4B word units */
32 static void ath_pci_read_cachesize(struct ath_softc *sc, int *csz)
36 pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE,
41 * This check was put in to avoid "unplesant" consequences if
42 * the bootrom has not fully initialized all PCI devices.
43 * Sometimes the cache line size register is not set
47 *csz = DEFAULT_CACHELINE >> 2; /* Use the default size */
50 static void ath_pci_cleanup(struct ath_softc *sc)
52 struct pci_dev *pdev = to_pci_dev(sc->dev);
54 pci_iounmap(pdev, sc->mem);
55 pci_disable_device(pdev);
56 pci_release_region(pdev, 0);
59 static bool ath_pci_eeprom_read(struct ath_hw *ah, u32 off, u16 *data)
61 (void)REG_READ(ah, AR5416_EEPROM_OFFSET + (off << AR5416_EEPROM_S));
63 if (!ath9k_hw_wait(ah,
64 AR_EEPROM_STATUS_DATA,
65 AR_EEPROM_STATUS_DATA_BUSY |
66 AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0,
71 *data = MS(REG_READ(ah, AR_EEPROM_STATUS_DATA),
72 AR_EEPROM_STATUS_DATA_VAL);
77 static struct ath_bus_ops ath_pci_bus_ops = {
78 .read_cachesize = ath_pci_read_cachesize,
79 .cleanup = ath_pci_cleanup,
80 .eeprom_read = ath_pci_eeprom_read,
83 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
86 struct ath_wiphy *aphy;
88 struct ieee80211_hw *hw;
94 if (pci_enable_device(pdev))
97 ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
100 printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
104 ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
107 printk(KERN_ERR "ath9k: 32-bit DMA consistent "
108 "DMA enable failed\n");
113 * Cache line size is used to size and align various
114 * structures used to communicate with the hardware.
116 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
119 * Linux 2.4.18 (at least) writes the cache line size
120 * register as a 16-bit wide register which is wrong.
121 * We must have this setup properly for rx buffer
122 * DMA to work so force a reasonable value here if it
125 csz = L1_CACHE_BYTES / sizeof(u32);
126 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
129 * The default setting of latency timer yields poor results,
130 * set it to the value used by other systems. It may be worth
131 * tweaking this setting more.
133 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
135 pci_set_master(pdev);
138 * Disable the RETRY_TIMEOUT register (0x41) to keep
139 * PCI Tx retries from interfering with C3 CPU state.
141 pci_read_config_dword(pdev, 0x40, &val);
142 if ((val & 0x0000ff00) != 0)
143 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
145 ret = pci_request_region(pdev, 0, "ath9k");
147 dev_err(&pdev->dev, "PCI memory region reserve error\n");
152 mem = pci_iomap(pdev, 0, 0);
154 printk(KERN_ERR "PCI memory map error\n") ;
159 hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) +
160 sizeof(struct ath_softc), &ath9k_ops);
162 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
166 SET_IEEE80211_DEV(hw, &pdev->dev);
167 pci_set_drvdata(pdev, hw);
170 sc = (struct ath_softc *) (aphy + 1);
173 sc->pri_wiphy = aphy;
175 sc->dev = &pdev->dev;
177 sc->bus_ops = &ath_pci_bus_ops;
179 if (ath_attach(id->device, sc) != 0) {
184 /* setup interrupt service routine */
186 if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
187 printk(KERN_ERR "%s: request_irq failed\n",
188 wiphy_name(hw->wiphy));
197 "%s: Atheros AR%s MAC/BB Rev:%x "
198 "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n",
199 wiphy_name(hw->wiphy),
200 ath_mac_bb_name(ah->hw_version.macVersion),
201 ah->hw_version.macRev,
202 ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)),
203 ah->hw_version.phyRev,
204 (unsigned long)mem, pdev->irq);
210 ieee80211_free_hw(hw);
212 pci_iounmap(pdev, mem);
214 pci_release_region(pdev, 0);
216 pci_disable_device(pdev);
220 static void ath_pci_remove(struct pci_dev *pdev)
222 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
223 struct ath_wiphy *aphy = hw->priv;
224 struct ath_softc *sc = aphy->sc;
231 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
233 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
234 struct ath_wiphy *aphy = hw->priv;
235 struct ath_softc *sc = aphy->sc;
237 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
239 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
240 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
241 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
244 pci_save_state(pdev);
245 pci_disable_device(pdev);
246 pci_set_power_state(pdev, PCI_D3hot);
251 static int ath_pci_resume(struct pci_dev *pdev)
253 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
254 struct ath_wiphy *aphy = hw->priv;
255 struct ath_softc *sc = aphy->sc;
259 err = pci_enable_device(pdev);
262 pci_restore_state(pdev);
264 * Suspend/Resume resets the PCI configuration space, so we have to
265 * re-disable the RETRY_TIMEOUT register (0x41) to keep
266 * PCI Tx retries from interfering with C3 CPU state
268 pci_read_config_dword(pdev, 0x40, &val);
269 if ((val & 0x0000ff00) != 0)
270 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
273 ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
274 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
275 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
277 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
279 * check the h/w rfkill state on resume
280 * and start the rfkill poll timer
282 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
283 queue_delayed_work(sc->hw->workqueue,
284 &sc->rf_kill.rfkill_poll, 0);
290 #endif /* CONFIG_PM */
292 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
294 static struct pci_driver ath_pci_driver = {
296 .id_table = ath_pci_id_table,
297 .probe = ath_pci_probe,
298 .remove = ath_pci_remove,
300 .suspend = ath_pci_suspend,
301 .resume = ath_pci_resume,
302 #endif /* CONFIG_PM */
305 int ath_pci_init(void)
307 return pci_register_driver(&ath_pci_driver);
310 void ath_pci_exit(void)
312 pci_unregister_driver(&ath_pci_driver);