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 | 20 | |
a3aa1884 | 21 | static DEFINE_PCI_DEVICE_TABLE(ath_pci_id_table) = { |
6baff7f9 GJ |
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 */ | |
5ffaf8a3 | 28 | { PCI_VDEVICE(ATHEROS, 0x002C) }, /* PCI-E 802.11n bonded out */ |
ac88b6ec VN |
29 | { PCI_VDEVICE(ATHEROS, 0x002D) }, /* PCI */ |
30 | { PCI_VDEVICE(ATHEROS, 0x002E) }, /* PCI-E */ | |
733f0ea4 | 31 | { PCI_VDEVICE(ATHEROS, 0x0030) }, /* PCI-E AR9300 */ |
6baff7f9 GJ |
32 | { 0 } |
33 | }; | |
34 | ||
35 | /* return bus cachesize in 4B word units */ | |
5bb12791 | 36 | static void ath_pci_read_cachesize(struct ath_common *common, int *csz) |
6baff7f9 | 37 | { |
bc974f4a | 38 | struct ath_softc *sc = (struct ath_softc *) common->priv; |
6baff7f9 GJ |
39 | u8 u8tmp; |
40 | ||
f020979d | 41 | pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE, &u8tmp); |
6baff7f9 GJ |
42 | *csz = (int)u8tmp; |
43 | ||
44 | /* | |
45 | * This check was put in to avoid "unplesant" consequences if | |
46 | * the bootrom has not fully initialized all PCI devices. | |
47 | * Sometimes the cache line size register is not set | |
48 | */ | |
49 | ||
50 | if (*csz == 0) | |
51 | *csz = DEFAULT_CACHELINE >> 2; /* Use the default size */ | |
52 | } | |
53 | ||
5bb12791 | 54 | static bool ath_pci_eeprom_read(struct ath_common *common, u32 off, u16 *data) |
9dbeb91a | 55 | { |
5bb12791 LR |
56 | struct ath_hw *ah = (struct ath_hw *) common->ah; |
57 | ||
475a6e4d | 58 | common->ops->read(ah, AR5416_EEPROM_OFFSET + (off << AR5416_EEPROM_S)); |
9dbeb91a GJ |
59 | |
60 | if (!ath9k_hw_wait(ah, | |
61 | AR_EEPROM_STATUS_DATA, | |
62 | AR_EEPROM_STATUS_DATA_BUSY | | |
0caa7b14 S |
63 | AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0, |
64 | AH_WAIT_TIMEOUT)) { | |
9dbeb91a GJ |
65 | return false; |
66 | } | |
67 | ||
475a6e4d | 68 | *data = MS(common->ops->read(ah, AR_EEPROM_STATUS_DATA), |
9dbeb91a GJ |
69 | AR_EEPROM_STATUS_DATA_VAL); |
70 | ||
71 | return true; | |
72 | } | |
73 | ||
867633f0 LR |
74 | /* |
75 | * Bluetooth coexistance requires disabling ASPM. | |
76 | */ | |
5bb12791 | 77 | static void ath_pci_bt_coex_prep(struct ath_common *common) |
867633f0 | 78 | { |
bc974f4a | 79 | struct ath_softc *sc = (struct ath_softc *) common->priv; |
867633f0 LR |
80 | struct pci_dev *pdev = to_pci_dev(sc->dev); |
81 | u8 aspm; | |
82 | ||
83 | if (!pdev->is_pcie) | |
84 | return; | |
85 | ||
86 | pci_read_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, &aspm); | |
87 | aspm &= ~(ATH_PCIE_CAP_LINK_L0S | ATH_PCIE_CAP_LINK_L1); | |
88 | pci_write_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, aspm); | |
89 | } | |
90 | ||
83bd11a0 | 91 | static const struct ath_bus_ops ath_pci_bus_ops = { |
497ad9ad | 92 | .ath_bus_type = ATH_PCI, |
6baff7f9 | 93 | .read_cachesize = ath_pci_read_cachesize, |
9dbeb91a | 94 | .eeprom_read = ath_pci_eeprom_read, |
867633f0 | 95 | .bt_coex_prep = ath_pci_bt_coex_prep, |
6baff7f9 GJ |
96 | }; |
97 | ||
98 | static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
99 | { | |
100 | void __iomem *mem; | |
bce048d7 | 101 | struct ath_wiphy *aphy; |
6baff7f9 GJ |
102 | struct ath_softc *sc; |
103 | struct ieee80211_hw *hw; | |
104 | u8 csz; | |
aeac355d | 105 | u16 subsysid; |
f0214843 | 106 | u32 val; |
6baff7f9 | 107 | int ret = 0; |
f934c4d9 | 108 | char hw_name[64]; |
6baff7f9 GJ |
109 | |
110 | if (pci_enable_device(pdev)) | |
111 | return -EIO; | |
112 | ||
e930438c | 113 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
6baff7f9 GJ |
114 | if (ret) { |
115 | printk(KERN_ERR "ath9k: 32-bit DMA not available\n"); | |
285f2dda | 116 | goto err_dma; |
6baff7f9 GJ |
117 | } |
118 | ||
e930438c | 119 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
6baff7f9 GJ |
120 | if (ret) { |
121 | printk(KERN_ERR "ath9k: 32-bit DMA consistent " | |
122 | "DMA enable failed\n"); | |
285f2dda | 123 | goto err_dma; |
6baff7f9 GJ |
124 | } |
125 | ||
126 | /* | |
127 | * Cache line size is used to size and align various | |
128 | * structures used to communicate with the hardware. | |
129 | */ | |
130 | pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz); | |
131 | if (csz == 0) { | |
132 | /* | |
133 | * Linux 2.4.18 (at least) writes the cache line size | |
134 | * register as a 16-bit wide register which is wrong. | |
135 | * We must have this setup properly for rx buffer | |
136 | * DMA to work so force a reasonable value here if it | |
137 | * comes up zero. | |
138 | */ | |
139 | csz = L1_CACHE_BYTES / sizeof(u32); | |
140 | pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz); | |
141 | } | |
142 | /* | |
143 | * The default setting of latency timer yields poor results, | |
144 | * set it to the value used by other systems. It may be worth | |
145 | * tweaking this setting more. | |
146 | */ | |
147 | pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8); | |
148 | ||
149 | pci_set_master(pdev); | |
150 | ||
f0214843 JM |
151 | /* |
152 | * Disable the RETRY_TIMEOUT register (0x41) to keep | |
153 | * PCI Tx retries from interfering with C3 CPU state. | |
154 | */ | |
155 | pci_read_config_dword(pdev, 0x40, &val); | |
156 | if ((val & 0x0000ff00) != 0) | |
157 | pci_write_config_dword(pdev, 0x40, val & 0xffff00ff); | |
158 | ||
6baff7f9 GJ |
159 | ret = pci_request_region(pdev, 0, "ath9k"); |
160 | if (ret) { | |
161 | dev_err(&pdev->dev, "PCI memory region reserve error\n"); | |
162 | ret = -ENODEV; | |
285f2dda | 163 | goto err_region; |
6baff7f9 GJ |
164 | } |
165 | ||
166 | mem = pci_iomap(pdev, 0, 0); | |
167 | if (!mem) { | |
168 | printk(KERN_ERR "PCI memory map error\n") ; | |
169 | ret = -EIO; | |
285f2dda | 170 | goto err_iomap; |
6baff7f9 GJ |
171 | } |
172 | ||
bce048d7 JM |
173 | hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) + |
174 | sizeof(struct ath_softc), &ath9k_ops); | |
db6be53c | 175 | if (!hw) { |
285f2dda | 176 | dev_err(&pdev->dev, "No memory for ieee80211_hw\n"); |
db6be53c | 177 | ret = -ENOMEM; |
285f2dda | 178 | goto err_alloc_hw; |
6baff7f9 GJ |
179 | } |
180 | ||
181 | SET_IEEE80211_DEV(hw, &pdev->dev); | |
182 | pci_set_drvdata(pdev, hw); | |
183 | ||
bce048d7 JM |
184 | aphy = hw->priv; |
185 | sc = (struct ath_softc *) (aphy + 1); | |
186 | aphy->sc = sc; | |
187 | aphy->hw = hw; | |
188 | sc->pri_wiphy = aphy; | |
6baff7f9 GJ |
189 | sc->hw = hw; |
190 | sc->dev = &pdev->dev; | |
191 | sc->mem = mem; | |
6baff7f9 | 192 | |
5e4ea1f0 S |
193 | /* Will be cleared in ath9k_start() */ |
194 | sc->sc_flags |= SC_OP_INVALID; | |
6baff7f9 | 195 | |
fc548af8 | 196 | ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc); |
580171f7 LR |
197 | if (ret) { |
198 | dev_err(&pdev->dev, "request_irq failed\n"); | |
285f2dda | 199 | goto err_irq; |
6baff7f9 GJ |
200 | } |
201 | ||
202 | sc->irq = pdev->irq; | |
203 | ||
285f2dda S |
204 | pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsysid); |
205 | ret = ath9k_init_device(id->device, sc, subsysid, &ath_pci_bus_ops); | |
206 | if (ret) { | |
207 | dev_err(&pdev->dev, "Failed to initialize device\n"); | |
208 | goto err_init; | |
209 | } | |
210 | ||
211 | ath9k_hw_name(sc->sc_ah, hw_name, sizeof(hw_name)); | |
6baff7f9 | 212 | printk(KERN_INFO |
f934c4d9 | 213 | "%s: %s mem=0x%lx, irq=%d\n", |
6baff7f9 | 214 | wiphy_name(hw->wiphy), |
f934c4d9 | 215 | hw_name, |
6baff7f9 GJ |
216 | (unsigned long)mem, pdev->irq); |
217 | ||
218 | return 0; | |
285f2dda S |
219 | |
220 | err_init: | |
221 | free_irq(sc->irq, sc); | |
222 | err_irq: | |
6baff7f9 | 223 | ieee80211_free_hw(hw); |
285f2dda | 224 | err_alloc_hw: |
6baff7f9 | 225 | pci_iounmap(pdev, mem); |
285f2dda | 226 | err_iomap: |
6baff7f9 | 227 | pci_release_region(pdev, 0); |
285f2dda S |
228 | err_region: |
229 | /* Nothing */ | |
230 | err_dma: | |
6baff7f9 GJ |
231 | pci_disable_device(pdev); |
232 | return ret; | |
233 | } | |
234 | ||
235 | static void ath_pci_remove(struct pci_dev *pdev) | |
236 | { | |
237 | struct ieee80211_hw *hw = pci_get_drvdata(pdev); | |
bce048d7 JM |
238 | struct ath_wiphy *aphy = hw->priv; |
239 | struct ath_softc *sc = aphy->sc; | |
ab5132a2 | 240 | void __iomem *mem = sc->mem; |
6baff7f9 | 241 | |
285f2dda S |
242 | ath9k_deinit_device(sc); |
243 | free_irq(sc->irq, sc); | |
244 | ieee80211_free_hw(sc->hw); | |
ab5132a2 PR |
245 | |
246 | pci_iounmap(pdev, mem); | |
247 | pci_disable_device(pdev); | |
248 | pci_release_region(pdev, 0); | |
6baff7f9 GJ |
249 | } |
250 | ||
251 | #ifdef CONFIG_PM | |
252 | ||
253 | static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
254 | { | |
255 | struct ieee80211_hw *hw = pci_get_drvdata(pdev); | |
bce048d7 JM |
256 | struct ath_wiphy *aphy = hw->priv; |
257 | struct ath_softc *sc = aphy->sc; | |
6baff7f9 | 258 | |
08fc5c1b | 259 | ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1); |
6baff7f9 | 260 | |
6baff7f9 GJ |
261 | pci_save_state(pdev); |
262 | pci_disable_device(pdev); | |
263 | pci_set_power_state(pdev, PCI_D3hot); | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static int ath_pci_resume(struct pci_dev *pdev) | |
269 | { | |
270 | struct ieee80211_hw *hw = pci_get_drvdata(pdev); | |
bce048d7 JM |
271 | struct ath_wiphy *aphy = hw->priv; |
272 | struct ath_softc *sc = aphy->sc; | |
f0214843 | 273 | u32 val; |
6baff7f9 GJ |
274 | int err; |
275 | ||
523c36fc S |
276 | pci_restore_state(pdev); |
277 | ||
6baff7f9 GJ |
278 | err = pci_enable_device(pdev); |
279 | if (err) | |
280 | return err; | |
523c36fc | 281 | |
f0214843 JM |
282 | /* |
283 | * Suspend/Resume resets the PCI configuration space, so we have to | |
284 | * re-disable the RETRY_TIMEOUT register (0x41) to keep | |
285 | * PCI Tx retries from interfering with C3 CPU state | |
286 | */ | |
287 | pci_read_config_dword(pdev, 0x40, &val); | |
288 | if ((val & 0x0000ff00) != 0) | |
289 | pci_write_config_dword(pdev, 0x40, val & 0xffff00ff); | |
6baff7f9 GJ |
290 | |
291 | /* Enable LED */ | |
08fc5c1b | 292 | ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin, |
6baff7f9 | 293 | AR_GPIO_OUTPUT_MUX_AS_OUTPUT); |
08fc5c1b | 294 | ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1); |
6baff7f9 | 295 | |
6baff7f9 GJ |
296 | return 0; |
297 | } | |
298 | ||
299 | #endif /* CONFIG_PM */ | |
300 | ||
301 | MODULE_DEVICE_TABLE(pci, ath_pci_id_table); | |
302 | ||
303 | static struct pci_driver ath_pci_driver = { | |
304 | .name = "ath9k", | |
305 | .id_table = ath_pci_id_table, | |
306 | .probe = ath_pci_probe, | |
307 | .remove = ath_pci_remove, | |
308 | #ifdef CONFIG_PM | |
309 | .suspend = ath_pci_suspend, | |
310 | .resume = ath_pci_resume, | |
311 | #endif /* CONFIG_PM */ | |
312 | }; | |
313 | ||
db0f41f5 | 314 | int ath_pci_init(void) |
6baff7f9 GJ |
315 | { |
316 | return pci_register_driver(&ath_pci_driver); | |
317 | } | |
318 | ||
319 | void ath_pci_exit(void) | |
320 | { | |
321 | pci_unregister_driver(&ath_pci_driver); | |
322 | } |