Commit | Line | Data |
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6baff7f9 | 1 | /* |
cee075a2 | 2 | * Copyright (c) 2008-2009 Atheros Communications Inc. |
6baff7f9 GJ |
3 | * |
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. | |
7 | * | |
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. | |
15 | */ | |
16 | ||
17 | #include <linux/nl80211.h> | |
18 | #include <linux/pci.h> | |
394cf0a1 | 19 | #include "ath9k.h" |
6baff7f9 GJ |
20 | |
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 | { 0 } | |
29 | }; | |
30 | ||
31 | /* return bus cachesize in 4B word units */ | |
32 | static void ath_pci_read_cachesize(struct ath_softc *sc, int *csz) | |
33 | { | |
34 | u8 u8tmp; | |
35 | ||
36 | pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE, | |
37 | (u8 *)&u8tmp); | |
38 | *csz = (int)u8tmp; | |
39 | ||
40 | /* | |
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 | |
44 | */ | |
45 | ||
46 | if (*csz == 0) | |
47 | *csz = DEFAULT_CACHELINE >> 2; /* Use the default size */ | |
48 | } | |
49 | ||
50 | static void ath_pci_cleanup(struct ath_softc *sc) | |
51 | { | |
52 | struct pci_dev *pdev = to_pci_dev(sc->dev); | |
53 | ||
54 | pci_iounmap(pdev, sc->mem); | |
6baff7f9 | 55 | pci_disable_device(pdev); |
db0f41f5 | 56 | pci_release_region(pdev, 0); |
6baff7f9 GJ |
57 | } |
58 | ||
cbe61d8a | 59 | static bool ath_pci_eeprom_read(struct ath_hw *ah, u32 off, u16 *data) |
9dbeb91a GJ |
60 | { |
61 | (void)REG_READ(ah, AR5416_EEPROM_OFFSET + (off << AR5416_EEPROM_S)); | |
62 | ||
63 | if (!ath9k_hw_wait(ah, | |
64 | AR_EEPROM_STATUS_DATA, | |
65 | AR_EEPROM_STATUS_DATA_BUSY | | |
0caa7b14 S |
66 | AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0, |
67 | AH_WAIT_TIMEOUT)) { | |
9dbeb91a GJ |
68 | return false; |
69 | } | |
70 | ||
71 | *data = MS(REG_READ(ah, AR_EEPROM_STATUS_DATA), | |
72 | AR_EEPROM_STATUS_DATA_VAL); | |
73 | ||
74 | return true; | |
75 | } | |
76 | ||
6baff7f9 GJ |
77 | static struct ath_bus_ops ath_pci_bus_ops = { |
78 | .read_cachesize = ath_pci_read_cachesize, | |
79 | .cleanup = ath_pci_cleanup, | |
9dbeb91a | 80 | .eeprom_read = ath_pci_eeprom_read, |
6baff7f9 GJ |
81 | }; |
82 | ||
83 | static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
84 | { | |
85 | void __iomem *mem; | |
bce048d7 | 86 | struct ath_wiphy *aphy; |
6baff7f9 GJ |
87 | struct ath_softc *sc; |
88 | struct ieee80211_hw *hw; | |
89 | u8 csz; | |
6baff7f9 | 90 | int ret = 0; |
cbe61d8a | 91 | struct ath_hw *ah; |
6baff7f9 GJ |
92 | |
93 | if (pci_enable_device(pdev)) | |
94 | return -EIO; | |
95 | ||
e930438c | 96 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
6baff7f9 GJ |
97 | |
98 | if (ret) { | |
99 | printk(KERN_ERR "ath9k: 32-bit DMA not available\n"); | |
100 | goto bad; | |
101 | } | |
102 | ||
e930438c | 103 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
6baff7f9 GJ |
104 | |
105 | if (ret) { | |
106 | printk(KERN_ERR "ath9k: 32-bit DMA consistent " | |
107 | "DMA enable failed\n"); | |
108 | goto bad; | |
109 | } | |
110 | ||
111 | /* | |
112 | * Cache line size is used to size and align various | |
113 | * structures used to communicate with the hardware. | |
114 | */ | |
115 | pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz); | |
116 | if (csz == 0) { | |
117 | /* | |
118 | * Linux 2.4.18 (at least) writes the cache line size | |
119 | * register as a 16-bit wide register which is wrong. | |
120 | * We must have this setup properly for rx buffer | |
121 | * DMA to work so force a reasonable value here if it | |
122 | * comes up zero. | |
123 | */ | |
124 | csz = L1_CACHE_BYTES / sizeof(u32); | |
125 | pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz); | |
126 | } | |
127 | /* | |
128 | * The default setting of latency timer yields poor results, | |
129 | * set it to the value used by other systems. It may be worth | |
130 | * tweaking this setting more. | |
131 | */ | |
132 | pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8); | |
133 | ||
134 | pci_set_master(pdev); | |
135 | ||
6baff7f9 GJ |
136 | ret = pci_request_region(pdev, 0, "ath9k"); |
137 | if (ret) { | |
138 | dev_err(&pdev->dev, "PCI memory region reserve error\n"); | |
139 | ret = -ENODEV; | |
140 | goto bad; | |
141 | } | |
142 | ||
143 | mem = pci_iomap(pdev, 0, 0); | |
144 | if (!mem) { | |
145 | printk(KERN_ERR "PCI memory map error\n") ; | |
146 | ret = -EIO; | |
147 | goto bad1; | |
148 | } | |
149 | ||
bce048d7 JM |
150 | hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) + |
151 | sizeof(struct ath_softc), &ath9k_ops); | |
6baff7f9 GJ |
152 | if (hw == NULL) { |
153 | printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n"); | |
154 | goto bad2; | |
155 | } | |
156 | ||
157 | SET_IEEE80211_DEV(hw, &pdev->dev); | |
158 | pci_set_drvdata(pdev, hw); | |
159 | ||
bce048d7 JM |
160 | aphy = hw->priv; |
161 | sc = (struct ath_softc *) (aphy + 1); | |
162 | aphy->sc = sc; | |
163 | aphy->hw = hw; | |
164 | sc->pri_wiphy = aphy; | |
6baff7f9 GJ |
165 | sc->hw = hw; |
166 | sc->dev = &pdev->dev; | |
167 | sc->mem = mem; | |
168 | sc->bus_ops = &ath_pci_bus_ops; | |
169 | ||
170 | if (ath_attach(id->device, sc) != 0) { | |
171 | ret = -ENODEV; | |
172 | goto bad3; | |
173 | } | |
174 | ||
175 | /* setup interrupt service routine */ | |
176 | ||
177 | if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) { | |
178 | printk(KERN_ERR "%s: request_irq failed\n", | |
179 | wiphy_name(hw->wiphy)); | |
180 | ret = -EIO; | |
181 | goto bad4; | |
182 | } | |
183 | ||
184 | sc->irq = pdev->irq; | |
185 | ||
186 | ah = sc->sc_ah; | |
187 | printk(KERN_INFO | |
188 | "%s: Atheros AR%s MAC/BB Rev:%x " | |
189 | "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n", | |
190 | wiphy_name(hw->wiphy), | |
d535a42a S |
191 | ath_mac_bb_name(ah->hw_version.macVersion), |
192 | ah->hw_version.macRev, | |
193 | ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)), | |
194 | ah->hw_version.phyRev, | |
6baff7f9 GJ |
195 | (unsigned long)mem, pdev->irq); |
196 | ||
197 | return 0; | |
198 | bad4: | |
199 | ath_detach(sc); | |
200 | bad3: | |
201 | ieee80211_free_hw(hw); | |
202 | bad2: | |
203 | pci_iounmap(pdev, mem); | |
204 | bad1: | |
205 | pci_release_region(pdev, 0); | |
206 | bad: | |
207 | pci_disable_device(pdev); | |
208 | return ret; | |
209 | } | |
210 | ||
211 | static void ath_pci_remove(struct pci_dev *pdev) | |
212 | { | |
213 | struct ieee80211_hw *hw = pci_get_drvdata(pdev); | |
bce048d7 JM |
214 | struct ath_wiphy *aphy = hw->priv; |
215 | struct ath_softc *sc = aphy->sc; | |
6baff7f9 GJ |
216 | |
217 | ath_cleanup(sc); | |
218 | } | |
219 | ||
220 | #ifdef CONFIG_PM | |
221 | ||
222 | static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
223 | { | |
224 | struct ieee80211_hw *hw = pci_get_drvdata(pdev); | |
bce048d7 JM |
225 | struct ath_wiphy *aphy = hw->priv; |
226 | struct ath_softc *sc = aphy->sc; | |
6baff7f9 GJ |
227 | |
228 | ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1); | |
229 | ||
6baff7f9 GJ |
230 | pci_save_state(pdev); |
231 | pci_disable_device(pdev); | |
232 | pci_set_power_state(pdev, PCI_D3hot); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int ath_pci_resume(struct pci_dev *pdev) | |
238 | { | |
239 | struct ieee80211_hw *hw = pci_get_drvdata(pdev); | |
bce048d7 JM |
240 | struct ath_wiphy *aphy = hw->priv; |
241 | struct ath_softc *sc = aphy->sc; | |
6baff7f9 GJ |
242 | int err; |
243 | ||
244 | err = pci_enable_device(pdev); | |
245 | if (err) | |
246 | return err; | |
247 | pci_restore_state(pdev); | |
6baff7f9 GJ |
248 | |
249 | /* Enable LED */ | |
250 | ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN, | |
251 | AR_GPIO_OUTPUT_MUX_AS_OUTPUT); | |
252 | ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1); | |
253 | ||
6baff7f9 GJ |
254 | return 0; |
255 | } | |
256 | ||
257 | #endif /* CONFIG_PM */ | |
258 | ||
259 | MODULE_DEVICE_TABLE(pci, ath_pci_id_table); | |
260 | ||
261 | static struct pci_driver ath_pci_driver = { | |
262 | .name = "ath9k", | |
263 | .id_table = ath_pci_id_table, | |
264 | .probe = ath_pci_probe, | |
265 | .remove = ath_pci_remove, | |
266 | #ifdef CONFIG_PM | |
267 | .suspend = ath_pci_suspend, | |
268 | .resume = ath_pci_resume, | |
269 | #endif /* CONFIG_PM */ | |
270 | }; | |
271 | ||
db0f41f5 | 272 | int ath_pci_init(void) |
6baff7f9 GJ |
273 | { |
274 | return pci_register_driver(&ath_pci_driver); | |
275 | } | |
276 | ||
277 | void ath_pci_exit(void) | |
278 | { | |
279 | pci_unregister_driver(&ath_pci_driver); | |
280 | } |