Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-nvram
[linux-2.6] / drivers / net / wireless / ath5k / attach.c
1 /*
2  * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
3  * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  *
17  */
18
19 /*************************************\
20 * Attach/Detach Functions and helpers *
21 \*************************************/
22
23 #include <linux/pci.h>
24 #include "ath5k.h"
25 #include "reg.h"
26 #include "debug.h"
27 #include "base.h"
28
29 /**
30  * ath5k_hw_post - Power On Self Test helper function
31  *
32  * @ah: The &struct ath5k_hw
33  */
34 static int ath5k_hw_post(struct ath5k_hw *ah)
35 {
36
37         int i, c;
38         u16 cur_reg;
39         u16 regs[2] = {AR5K_STA_ID0, AR5K_PHY(8)};
40         u32 var_pattern;
41         u32 static_pattern[4] = {
42                 0x55555555,     0xaaaaaaaa,
43                 0x66666666,     0x99999999
44         };
45         u32 init_val;
46         u32 cur_val;
47
48         for (c = 0; c < 2; c++) {
49
50                 cur_reg = regs[c];
51
52                 /* Save previous value */
53                 init_val = ath5k_hw_reg_read(ah, cur_reg);
54
55                 for (i = 0; i < 256; i++) {
56                         var_pattern = i << 16 | i;
57                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
58                         cur_val = ath5k_hw_reg_read(ah, cur_reg);
59
60                         if (cur_val != var_pattern) {
61                                 ATH5K_ERR(ah->ah_sc, "POST Failed !!!\n");
62                                 return -EAGAIN;
63                         }
64
65                         /* Found on ndiswrapper dumps */
66                         var_pattern = 0x0039080f;
67                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
68                 }
69
70                 for (i = 0; i < 4; i++) {
71                         var_pattern = static_pattern[i];
72                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
73                         cur_val = ath5k_hw_reg_read(ah, cur_reg);
74
75                         if (cur_val != var_pattern) {
76                                 ATH5K_ERR(ah->ah_sc, "POST Failed !!!\n");
77                                 return -EAGAIN;
78                         }
79
80                         /* Found on ndiswrapper dumps */
81                         var_pattern = 0x003b080f;
82                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
83                 }
84
85                 /* Restore previous value */
86                 ath5k_hw_reg_write(ah, init_val, cur_reg);
87
88         }
89
90         return 0;
91
92 }
93
94 /**
95  * ath5k_hw_attach - Check if hw is supported and init the needed structs
96  *
97  * @sc: The &struct ath5k_softc we got from the driver's attach function
98  * @mac_version: The mac version id (check out ath5k.h) based on pci id
99  *
100  * Check if the device is supported, perform a POST and initialize the needed
101  * structs. Returns -ENOMEM if we don't have memory for the needed structs,
102  * -ENODEV if the device is not supported or prints an error msg if something
103  * else went wrong.
104  */
105 struct ath5k_hw *ath5k_hw_attach(struct ath5k_softc *sc, u8 mac_version)
106 {
107         struct ath5k_hw *ah;
108         struct pci_dev *pdev = sc->pdev;
109         u8 mac[ETH_ALEN] = {};
110         int ret;
111         u32 srev;
112
113         /*If we passed the test malloc a ath5k_hw struct*/
114         ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
115         if (ah == NULL) {
116                 ret = -ENOMEM;
117                 ATH5K_ERR(sc, "out of memory\n");
118                 goto err;
119         }
120
121         ah->ah_sc = sc;
122         ah->ah_iobase = sc->iobase;
123
124         /*
125          * HW information
126          */
127         ah->ah_op_mode = NL80211_IFTYPE_STATION;
128         ah->ah_radar.r_enabled = AR5K_TUNE_RADAR_ALERT;
129         ah->ah_turbo = false;
130         ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
131         ah->ah_imr = 0;
132         ah->ah_atim_window = 0;
133         ah->ah_aifs = AR5K_TUNE_AIFS;
134         ah->ah_cw_min = AR5K_TUNE_CWMIN;
135         ah->ah_limit_tx_retries = AR5K_INIT_TX_RETRY;
136         ah->ah_software_retry = false;
137         ah->ah_ant_diversity = AR5K_TUNE_ANT_DIVERSITY;
138
139         /*
140          * Set the mac version based on the pci id
141          */
142         ah->ah_version = mac_version;
143
144         /*Fill the ath5k_hw struct with the needed functions*/
145         ret = ath5k_hw_init_desc_functions(ah);
146         if (ret)
147                 goto err_free;
148
149         /* Bring device out of sleep and reset it's units */
150         ret = ath5k_hw_nic_wakeup(ah, CHANNEL_B, true);
151         if (ret)
152                 goto err_free;
153
154         /* Get MAC, PHY and RADIO revisions */
155         srev = ath5k_hw_reg_read(ah, AR5K_SREV);
156         ah->ah_mac_srev = srev;
157         ah->ah_mac_version = AR5K_REG_MS(srev, AR5K_SREV_VER);
158         ah->ah_mac_revision = AR5K_REG_MS(srev, AR5K_SREV_REV);
159         ah->ah_phy_revision = ath5k_hw_reg_read(ah, AR5K_PHY_CHIP_ID) &
160                         0xffffffff;
161         ah->ah_radio_5ghz_revision = ath5k_hw_radio_revision(ah,
162                         CHANNEL_5GHZ);
163         ah->ah_phy = AR5K_PHY(0);
164
165         /* Try to identify radio chip based on it's srev */
166         switch (ah->ah_radio_5ghz_revision & 0xf0) {
167         case AR5K_SREV_RAD_5111:
168                 ah->ah_radio = AR5K_RF5111;
169                 ah->ah_single_chip = false;
170                 ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
171                                                         CHANNEL_2GHZ);
172                 ah->ah_phy_spending = AR5K_PHY_SPENDING_RF5111;
173                 break;
174         case AR5K_SREV_RAD_5112:
175         case AR5K_SREV_RAD_2112:
176                 ah->ah_radio = AR5K_RF5112;
177                 ah->ah_single_chip = false;
178                 ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
179                                                         CHANNEL_2GHZ);
180                 ah->ah_phy_spending = AR5K_PHY_SPENDING_RF5112;
181                 break;
182         case AR5K_SREV_RAD_2413:
183                 ah->ah_radio = AR5K_RF2413;
184                 ah->ah_single_chip = true;
185                 ah->ah_phy_spending = AR5K_PHY_SPENDING_RF2413;
186                 break;
187         case AR5K_SREV_RAD_5413:
188                 ah->ah_radio = AR5K_RF5413;
189                 ah->ah_single_chip = true;
190                 ah->ah_phy_spending = AR5K_PHY_SPENDING_RF5413;
191                 break;
192         case AR5K_SREV_RAD_2316:
193                 ah->ah_radio = AR5K_RF2316;
194                 ah->ah_single_chip = true;
195                 ah->ah_phy_spending = AR5K_PHY_SPENDING_RF2316;
196                 break;
197         case AR5K_SREV_RAD_2317:
198                 ah->ah_radio = AR5K_RF2317;
199                 ah->ah_single_chip = true;
200                 ah->ah_phy_spending = AR5K_PHY_SPENDING_RF2317;
201                 break;
202         case AR5K_SREV_RAD_5424:
203                 if (ah->ah_mac_version == AR5K_SREV_AR2425 ||
204                 ah->ah_mac_version == AR5K_SREV_AR2417){
205                         ah->ah_radio = AR5K_RF2425;
206                         ah->ah_single_chip = true;
207                         ah->ah_phy_spending = AR5K_PHY_SPENDING_RF2425;
208                 } else {
209                         ah->ah_radio = AR5K_RF5413;
210                         ah->ah_single_chip = true;
211                         ah->ah_phy_spending = AR5K_PHY_SPENDING_RF5413;
212                 }
213                 break;
214         default:
215                 /* Identify radio based on mac/phy srev */
216                 if (ah->ah_version == AR5K_AR5210) {
217                         ah->ah_radio = AR5K_RF5110;
218                         ah->ah_single_chip = false;
219                 } else if (ah->ah_version == AR5K_AR5211) {
220                         ah->ah_radio = AR5K_RF5111;
221                         ah->ah_single_chip = false;
222                         ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
223                                                                 CHANNEL_2GHZ);
224                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4) ||
225                 ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4) ||
226                 ah->ah_phy_revision == AR5K_SREV_PHY_2425) {
227                         ah->ah_radio = AR5K_RF2425;
228                         ah->ah_single_chip = true;
229                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2425;
230                         ah->ah_phy_spending = AR5K_PHY_SPENDING_RF2425;
231                 } else if (srev == AR5K_SREV_AR5213A &&
232                 ah->ah_phy_revision == AR5K_SREV_PHY_2112B) {
233                         ah->ah_radio = AR5K_RF5112;
234                         ah->ah_single_chip = false;
235                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2112B;
236                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2415 >> 4)) {
237                         ah->ah_radio = AR5K_RF2316;
238                         ah->ah_single_chip = true;
239                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2316;
240                         ah->ah_phy_spending = AR5K_PHY_SPENDING_RF2316;
241                 } else if (ah->ah_mac_version == (AR5K_SREV_AR5414 >> 4) ||
242                 ah->ah_phy_revision == AR5K_SREV_PHY_5413) {
243                         ah->ah_radio = AR5K_RF5413;
244                         ah->ah_single_chip = true;
245                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5413;
246                         ah->ah_phy_spending = AR5K_PHY_SPENDING_RF5413;
247                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2414 >> 4) ||
248                 ah->ah_phy_revision == AR5K_SREV_PHY_2413) {
249                         ah->ah_radio = AR5K_RF2413;
250                         ah->ah_single_chip = true;
251                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2413;
252                         ah->ah_phy_spending = AR5K_PHY_SPENDING_RF2413;
253                 } else {
254                         ATH5K_ERR(sc, "Couldn't identify radio revision.\n");
255                         ret = -ENODEV;
256                         goto err_free;
257                 }
258         }
259
260
261         /* Return on unsuported chips (unsupported eeprom etc) */
262         if ((srev >= AR5K_SREV_AR5416) &&
263         (srev < AR5K_SREV_AR2425)) {
264                 ATH5K_ERR(sc, "Device not yet supported.\n");
265                 ret = -ENODEV;
266                 goto err_free;
267         }
268
269         /*
270          * Write PCI-E power save settings
271          */
272         if ((ah->ah_version == AR5K_AR5212) && (pdev->is_pcie)) {
273                 ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES);
274                 ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES);
275                 /* Shut off RX when elecidle is asserted */
276                 ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES);
277                 ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES);
278                 /* TODO: EEPROM work */
279                 ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES);
280                 /* Shut off PLL and CLKREQ active in L1 */
281                 ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES);
282                 /* Preserce other settings */
283                 ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES);
284                 ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES);
285                 ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES);
286                 /* Reset SERDES to load new settings */
287                 ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET);
288                 mdelay(1);
289         }
290
291         /*
292          * POST
293          */
294         ret = ath5k_hw_post(ah);
295         if (ret)
296                 goto err_free;
297
298         /* Enable pci core retry fix on Hainan (5213A) and later chips */
299         if (srev >= AR5K_SREV_AR5213A)
300                 ath5k_hw_reg_write(ah, AR5K_PCICFG_RETRY_FIX, AR5K_PCICFG);
301
302         /*
303          * Get card capabilities, calibration values etc
304          * TODO: EEPROM work
305          */
306         ret = ath5k_eeprom_init(ah);
307         if (ret) {
308                 ATH5K_ERR(sc, "unable to init EEPROM\n");
309                 goto err_free;
310         }
311
312         /* Get misc capabilities */
313         ret = ath5k_hw_set_capabilities(ah);
314         if (ret) {
315                 ATH5K_ERR(sc, "unable to get device capabilities: 0x%04x\n",
316                         sc->pdev->device);
317                 goto err_free;
318         }
319
320         if (srev >= AR5K_SREV_AR2414) {
321                 ah->ah_combined_mic = true;
322                 AR5K_REG_ENABLE_BITS(ah, AR5K_MISC_MODE,
323                         AR5K_MISC_MODE_COMBINED_MIC);
324         }
325
326         /* MAC address is cleared until add_interface */
327         ath5k_hw_set_lladdr(ah, mac);
328
329         /* Set BSSID to bcast address: ff:ff:ff:ff:ff:ff for now */
330         memset(ah->ah_bssid, 0xff, ETH_ALEN);
331         ath5k_hw_set_associd(ah, ah->ah_bssid, 0);
332         ath5k_hw_set_opmode(ah);
333
334         ath5k_hw_set_rfgain_opt(ah);
335
336         return ah;
337 err_free:
338         kfree(ah);
339 err:
340         return ERR_PTR(ret);
341 }
342
343 /**
344  * ath5k_hw_detach - Free the ath5k_hw struct
345  *
346  * @ah: The &struct ath5k_hw
347  */
348 void ath5k_hw_detach(struct ath5k_hw *ah)
349 {
350         ATH5K_TRACE(ah->ah_sc);
351
352         __set_bit(ATH_STAT_INVALID, ah->ah_sc->status);
353
354         if (ah->ah_rf_banks != NULL)
355                 kfree(ah->ah_rf_banks);
356
357         /* assume interrupts are down */
358         kfree(ah);
359 }