Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / net / wireless / ath / 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 <linux/slab.h>
25 #include "ath5k.h"
26 #include "reg.h"
27 #include "debug.h"
28 #include "base.h"
29
30 /**
31  * ath5k_hw_post - Power On Self Test helper function
32  *
33  * @ah: The &struct ath5k_hw
34  */
35 static int ath5k_hw_post(struct ath5k_hw *ah)
36 {
37
38         static const u32 static_pattern[4] = {
39                 0x55555555,     0xaaaaaaaa,
40                 0x66666666,     0x99999999
41         };
42         static const u16 regs[2] = { AR5K_STA_ID0, AR5K_PHY(8) };
43         int i, c;
44         u16 cur_reg;
45         u32 var_pattern;
46         u32 init_val;
47         u32 cur_val;
48
49         for (c = 0; c < 2; c++) {
50
51                 cur_reg = regs[c];
52
53                 /* Save previous value */
54                 init_val = ath5k_hw_reg_read(ah, cur_reg);
55
56                 for (i = 0; i < 256; i++) {
57                         var_pattern = i << 16 | i;
58                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
59                         cur_val = ath5k_hw_reg_read(ah, cur_reg);
60
61                         if (cur_val != var_pattern) {
62                                 ATH5K_ERR(ah->ah_sc, "POST Failed !!!\n");
63                                 return -EAGAIN;
64                         }
65
66                         /* Found on ndiswrapper dumps */
67                         var_pattern = 0x0039080f;
68                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
69                 }
70
71                 for (i = 0; i < 4; i++) {
72                         var_pattern = static_pattern[i];
73                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
74                         cur_val = ath5k_hw_reg_read(ah, cur_reg);
75
76                         if (cur_val != var_pattern) {
77                                 ATH5K_ERR(ah->ah_sc, "POST Failed !!!\n");
78                                 return -EAGAIN;
79                         }
80
81                         /* Found on ndiswrapper dumps */
82                         var_pattern = 0x003b080f;
83                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
84                 }
85
86                 /* Restore previous value */
87                 ath5k_hw_reg_write(ah, init_val, cur_reg);
88
89         }
90
91         return 0;
92
93 }
94
95 /**
96  * ath5k_hw_attach - Check if hw is supported and init the needed structs
97  *
98  * @sc: The &struct ath5k_softc we got from the driver's attach function
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 int ath5k_hw_attach(struct ath5k_softc *sc)
106 {
107         struct ath5k_hw *ah = sc->ah;
108         struct ath_common *common = ath5k_hw_common(ah);
109         struct pci_dev *pdev = sc->pdev;
110         struct ath5k_eeprom_info *ee;
111         int ret;
112         u32 srev;
113
114         /*
115          * HW information
116          */
117         ah->ah_radar.r_enabled = AR5K_TUNE_RADAR_ALERT;
118         ah->ah_turbo = false;
119         ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
120         ah->ah_imr = 0;
121         ah->ah_atim_window = 0;
122         ah->ah_aifs = AR5K_TUNE_AIFS;
123         ah->ah_cw_min = AR5K_TUNE_CWMIN;
124         ah->ah_limit_tx_retries = AR5K_INIT_TX_RETRY;
125         ah->ah_software_retry = false;
126         ah->ah_ant_mode = AR5K_ANTMODE_DEFAULT;
127         ah->ah_noise_floor = -95;       /* until first NF calibration is run */
128         sc->ani_state.ani_mode = ATH5K_ANI_MODE_AUTO;
129         ah->ah_current_channel = &sc->channels[0];
130
131         /*
132          * Find the mac version
133          */
134         srev = ath5k_hw_reg_read(ah, AR5K_SREV);
135         if (srev < AR5K_SREV_AR5311)
136                 ah->ah_version = AR5K_AR5210;
137         else if (srev < AR5K_SREV_AR5212)
138                 ah->ah_version = AR5K_AR5211;
139         else
140                 ah->ah_version = AR5K_AR5212;
141
142         /*Fill the ath5k_hw struct with the needed functions*/
143         ret = ath5k_hw_init_desc_functions(ah);
144         if (ret)
145                 goto err_free;
146
147         /* Bring device out of sleep and reset it's units */
148         ret = ath5k_hw_nic_wakeup(ah, 0, true);
149         if (ret)
150                 goto err_free;
151
152         /* Get MAC, PHY and RADIO revisions */
153         ah->ah_mac_srev = srev;
154         ah->ah_mac_version = AR5K_REG_MS(srev, AR5K_SREV_VER);
155         ah->ah_phy_revision = ath5k_hw_reg_read(ah, AR5K_PHY_CHIP_ID) &
156                         0xffffffff;
157         ah->ah_radio_5ghz_revision = ath5k_hw_radio_revision(ah,
158                         CHANNEL_5GHZ);
159         ah->ah_phy = AR5K_PHY(0);
160
161         /* Try to identify radio chip based on it's srev */
162         switch (ah->ah_radio_5ghz_revision & 0xf0) {
163         case AR5K_SREV_RAD_5111:
164                 ah->ah_radio = AR5K_RF5111;
165                 ah->ah_single_chip = false;
166                 ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
167                                                         CHANNEL_2GHZ);
168                 break;
169         case AR5K_SREV_RAD_5112:
170         case AR5K_SREV_RAD_2112:
171                 ah->ah_radio = AR5K_RF5112;
172                 ah->ah_single_chip = false;
173                 ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
174                                                         CHANNEL_2GHZ);
175                 break;
176         case AR5K_SREV_RAD_2413:
177                 ah->ah_radio = AR5K_RF2413;
178                 ah->ah_single_chip = true;
179                 break;
180         case AR5K_SREV_RAD_5413:
181                 ah->ah_radio = AR5K_RF5413;
182                 ah->ah_single_chip = true;
183                 break;
184         case AR5K_SREV_RAD_2316:
185                 ah->ah_radio = AR5K_RF2316;
186                 ah->ah_single_chip = true;
187                 break;
188         case AR5K_SREV_RAD_2317:
189                 ah->ah_radio = AR5K_RF2317;
190                 ah->ah_single_chip = true;
191                 break;
192         case AR5K_SREV_RAD_5424:
193                 if (ah->ah_mac_version == AR5K_SREV_AR2425 ||
194                 ah->ah_mac_version == AR5K_SREV_AR2417){
195                         ah->ah_radio = AR5K_RF2425;
196                         ah->ah_single_chip = true;
197                 } else {
198                         ah->ah_radio = AR5K_RF5413;
199                         ah->ah_single_chip = true;
200                 }
201                 break;
202         default:
203                 /* Identify radio based on mac/phy srev */
204                 if (ah->ah_version == AR5K_AR5210) {
205                         ah->ah_radio = AR5K_RF5110;
206                         ah->ah_single_chip = false;
207                 } else if (ah->ah_version == AR5K_AR5211) {
208                         ah->ah_radio = AR5K_RF5111;
209                         ah->ah_single_chip = false;
210                         ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
211                                                                 CHANNEL_2GHZ);
212                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4) ||
213                 ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4) ||
214                 ah->ah_phy_revision == AR5K_SREV_PHY_2425) {
215                         ah->ah_radio = AR5K_RF2425;
216                         ah->ah_single_chip = true;
217                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2425;
218                 } else if (srev == AR5K_SREV_AR5213A &&
219                 ah->ah_phy_revision == AR5K_SREV_PHY_5212B) {
220                         ah->ah_radio = AR5K_RF5112;
221                         ah->ah_single_chip = false;
222                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5112B;
223                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2415 >> 4)) {
224                         ah->ah_radio = AR5K_RF2316;
225                         ah->ah_single_chip = true;
226                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2316;
227                 } else if (ah->ah_mac_version == (AR5K_SREV_AR5414 >> 4) ||
228                 ah->ah_phy_revision == AR5K_SREV_PHY_5413) {
229                         ah->ah_radio = AR5K_RF5413;
230                         ah->ah_single_chip = true;
231                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5413;
232                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2414 >> 4) ||
233                 ah->ah_phy_revision == AR5K_SREV_PHY_2413) {
234                         ah->ah_radio = AR5K_RF2413;
235                         ah->ah_single_chip = true;
236                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2413;
237                 } else {
238                         ATH5K_ERR(sc, "Couldn't identify radio revision.\n");
239                         ret = -ENODEV;
240                         goto err_free;
241                 }
242         }
243
244
245         /* Return on unsuported chips (unsupported eeprom etc) */
246         if ((srev >= AR5K_SREV_AR5416) &&
247         (srev < AR5K_SREV_AR2425)) {
248                 ATH5K_ERR(sc, "Device not yet supported.\n");
249                 ret = -ENODEV;
250                 goto err_free;
251         }
252
253         /*
254          * POST
255          */
256         ret = ath5k_hw_post(ah);
257         if (ret)
258                 goto err_free;
259
260         /* Enable pci core retry fix on Hainan (5213A) and later chips */
261         if (srev >= AR5K_SREV_AR5213A)
262                 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_RETRY_FIX);
263
264         /*
265          * Get card capabilities, calibration values etc
266          * TODO: EEPROM work
267          */
268         ret = ath5k_eeprom_init(ah);
269         if (ret) {
270                 ATH5K_ERR(sc, "unable to init EEPROM\n");
271                 goto err_free;
272         }
273
274         ee = &ah->ah_capabilities.cap_eeprom;
275
276         /*
277          * Write PCI-E power save settings
278          */
279         if ((ah->ah_version == AR5K_AR5212) && (pdev->is_pcie)) {
280                 ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES);
281                 ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES);
282
283                 /* Shut off RX when elecidle is asserted */
284                 ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES);
285                 ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES);
286
287                 /* If serdes programing is enabled, increase PCI-E
288                  * tx power for systems with long trace from host
289                  * to minicard connector. */
290                 if (ee->ee_serdes)
291                         ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES);
292                 else
293                         ath5k_hw_reg_write(ah, 0xf6800579, AR5K_PCIE_SERDES);
294
295                 /* Shut off PLL and CLKREQ active in L1 */
296                 ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES);
297
298                 /* Preserve other settings */
299                 ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES);
300                 ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES);
301                 ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES);
302
303                 /* Reset SERDES to load new settings */
304                 ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET);
305                 mdelay(1);
306         }
307
308         /* Get misc capabilities */
309         ret = ath5k_hw_set_capabilities(ah);
310         if (ret) {
311                 ATH5K_ERR(sc, "unable to get device capabilities: 0x%04x\n",
312                         sc->pdev->device);
313                 goto err_free;
314         }
315
316         /* Crypto settings */
317         ah->ah_aes_support = srev >= AR5K_SREV_AR5212_V4 &&
318                 (ee->ee_version >= AR5K_EEPROM_VERSION_5_0 &&
319                  !AR5K_EEPROM_AES_DIS(ee->ee_misc5));
320
321         if (srev >= AR5K_SREV_AR2414) {
322                 ah->ah_combined_mic = true;
323                 AR5K_REG_ENABLE_BITS(ah, AR5K_MISC_MODE,
324                         AR5K_MISC_MODE_COMBINED_MIC);
325         }
326
327         /* MAC address is cleared until add_interface */
328         ath5k_hw_set_lladdr(ah, (u8[ETH_ALEN]){});
329
330         /* Set BSSID to bcast address: ff:ff:ff:ff:ff:ff for now */
331         memcpy(common->curbssid, ath_bcast_mac, ETH_ALEN);
332         ath5k_hw_set_associd(ah);
333         ath5k_hw_set_opmode(ah, sc->opmode);
334
335         ath5k_hw_rfgain_opt_init(ah);
336
337         ath5k_hw_init_nfcal_hist(ah);
338
339         /* turn on HW LEDs */
340         ath5k_hw_set_ledstate(ah, AR5K_LED_INIT);
341
342         return 0;
343 err_free:
344         kfree(ah);
345         return ret;
346 }
347
348 /**
349  * ath5k_hw_detach - Free the ath5k_hw struct
350  *
351  * @ah: The &struct ath5k_hw
352  */
353 void ath5k_hw_detach(struct ath5k_hw *ah)
354 {
355         ATH5K_TRACE(ah->ah_sc);
356
357         __set_bit(ATH_STAT_INVALID, ah->ah_sc->status);
358
359         if (ah->ah_rf_banks != NULL)
360                 kfree(ah->ah_rf_banks);
361
362         ath5k_eeprom_detach(ah);
363
364         /* assume interrupts are down */
365 }