2 * Copyright (c) 2008-2009 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 */
28 { PCI_VDEVICE(ATHEROS, 0x002D) }, /* PCI */
29 { PCI_VDEVICE(ATHEROS, 0x002E) }, /* PCI-E */
33 /* return bus cachesize in 4B word units */
34 static void ath_pci_read_cachesize(struct ath_common *common, int *csz)
36 struct ath_hw *ah = (struct ath_hw *) common->ah;
37 struct ath_softc *sc = ah->ah_sc;
40 pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE, &u8tmp);
44 * This check was put in to avoid "unplesant" consequences if
45 * the bootrom has not fully initialized all PCI devices.
46 * Sometimes the cache line size register is not set
50 *csz = DEFAULT_CACHELINE >> 2; /* Use the default size */
53 static void ath_pci_cleanup(struct ath_common *common)
55 struct ath_hw *ah = (struct ath_hw *) common->ah;
56 struct ath_softc *sc = ah->ah_sc;
57 struct pci_dev *pdev = to_pci_dev(sc->dev);
59 pci_iounmap(pdev, sc->mem);
60 pci_disable_device(pdev);
61 pci_release_region(pdev, 0);
64 static bool ath_pci_eeprom_read(struct ath_common *common, u32 off, u16 *data)
66 struct ath_hw *ah = (struct ath_hw *) common->ah;
68 common->ops->read(ah, AR5416_EEPROM_OFFSET + (off << AR5416_EEPROM_S));
70 if (!ath9k_hw_wait(ah,
71 AR_EEPROM_STATUS_DATA,
72 AR_EEPROM_STATUS_DATA_BUSY |
73 AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0,
78 *data = MS(common->ops->read(ah, AR_EEPROM_STATUS_DATA),
79 AR_EEPROM_STATUS_DATA_VAL);
85 * Bluetooth coexistance requires disabling ASPM.
87 static void ath_pci_bt_coex_prep(struct ath_common *common)
89 struct ath_hw *ah = (struct ath_hw *) common->ah;
90 struct ath_softc *sc = ah->ah_sc;
91 struct pci_dev *pdev = to_pci_dev(sc->dev);
97 pci_read_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, &aspm);
98 aspm &= ~(ATH_PCIE_CAP_LINK_L0S | ATH_PCIE_CAP_LINK_L1);
99 pci_write_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, aspm);
102 const static struct ath_bus_ops ath_pci_bus_ops = {
103 .read_cachesize = ath_pci_read_cachesize,
104 .cleanup = ath_pci_cleanup,
105 .eeprom_read = ath_pci_eeprom_read,
106 .bt_coex_prep = ath_pci_bt_coex_prep,
109 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
112 struct ath_wiphy *aphy;
113 struct ath_softc *sc;
114 struct ieee80211_hw *hw;
121 if (pci_enable_device(pdev))
124 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
127 printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
131 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
134 printk(KERN_ERR "ath9k: 32-bit DMA consistent "
135 "DMA enable failed\n");
140 * Cache line size is used to size and align various
141 * structures used to communicate with the hardware.
143 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
146 * Linux 2.4.18 (at least) writes the cache line size
147 * register as a 16-bit wide register which is wrong.
148 * We must have this setup properly for rx buffer
149 * DMA to work so force a reasonable value here if it
152 csz = L1_CACHE_BYTES / sizeof(u32);
153 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
156 * The default setting of latency timer yields poor results,
157 * set it to the value used by other systems. It may be worth
158 * tweaking this setting more.
160 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
162 pci_set_master(pdev);
165 * Disable the RETRY_TIMEOUT register (0x41) to keep
166 * PCI Tx retries from interfering with C3 CPU state.
168 pci_read_config_dword(pdev, 0x40, &val);
169 if ((val & 0x0000ff00) != 0)
170 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
172 ret = pci_request_region(pdev, 0, "ath9k");
174 dev_err(&pdev->dev, "PCI memory region reserve error\n");
179 mem = pci_iomap(pdev, 0, 0);
181 printk(KERN_ERR "PCI memory map error\n") ;
186 hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) +
187 sizeof(struct ath_softc), &ath9k_ops);
189 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
194 SET_IEEE80211_DEV(hw, &pdev->dev);
195 pci_set_drvdata(pdev, hw);
198 sc = (struct ath_softc *) (aphy + 1);
201 sc->pri_wiphy = aphy;
203 sc->dev = &pdev->dev;
206 pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsysid);
207 ret = ath_init_device(id->device, sc, subsysid, &ath_pci_bus_ops);
209 dev_err(&pdev->dev, "failed to initialize device\n");
213 /* setup interrupt service routine */
215 ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc);
217 dev_err(&pdev->dev, "request_irq failed\n");
225 "%s: Atheros AR%s MAC/BB Rev:%x "
226 "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n",
227 wiphy_name(hw->wiphy),
228 ath_mac_bb_name(ah->hw_version.macVersion),
229 ah->hw_version.macRev,
230 ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)),
231 ah->hw_version.phyRev,
232 (unsigned long)mem, pdev->irq);
238 ieee80211_free_hw(hw);
240 pci_iounmap(pdev, mem);
242 pci_release_region(pdev, 0);
244 pci_disable_device(pdev);
248 static void ath_pci_remove(struct pci_dev *pdev)
250 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
251 struct ath_wiphy *aphy = hw->priv;
252 struct ath_softc *sc = aphy->sc;
259 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
261 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
262 struct ath_wiphy *aphy = hw->priv;
263 struct ath_softc *sc = aphy->sc;
265 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
267 pci_save_state(pdev);
268 pci_disable_device(pdev);
269 pci_set_power_state(pdev, PCI_D3hot);
274 static int ath_pci_resume(struct pci_dev *pdev)
276 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
277 struct ath_wiphy *aphy = hw->priv;
278 struct ath_softc *sc = aphy->sc;
282 pci_restore_state(pdev);
284 err = pci_enable_device(pdev);
289 * Suspend/Resume resets the PCI configuration space, so we have to
290 * re-disable the RETRY_TIMEOUT register (0x41) to keep
291 * PCI Tx retries from interfering with C3 CPU state
293 pci_read_config_dword(pdev, 0x40, &val);
294 if ((val & 0x0000ff00) != 0)
295 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
298 ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
299 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
300 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
305 #endif /* CONFIG_PM */
307 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
309 static struct pci_driver ath_pci_driver = {
311 .id_table = ath_pci_id_table,
312 .probe = ath_pci_probe,
313 .remove = ath_pci_remove,
315 .suspend = ath_pci_suspend,
316 .resume = ath_pci_resume,
317 #endif /* CONFIG_PM */
320 int ath_pci_init(void)
322 return pci_register_driver(&ath_pci_driver);
325 void ath_pci_exit(void)
327 pci_unregister_driver(&ath_pci_driver);