xref: /linux/drivers/net/wireless/ath/ath5k/attach.c (revision dd5648c9f53b5cbd9f948d752624400545f979fb)
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_limit_tx_retries = AR5K_INIT_TX_RETRY;
122 	ah->ah_software_retry = false;
123 	ah->ah_ant_mode = AR5K_ANTMODE_DEFAULT;
124 	ah->ah_noise_floor = -95;	/* until first NF calibration is run */
125 	sc->ani_state.ani_mode = ATH5K_ANI_MODE_AUTO;
126 	ah->ah_current_channel = &sc->channels[0];
127 
128 	/*
129 	 * Find the mac version
130 	 */
131 	srev = ath5k_hw_reg_read(ah, AR5K_SREV);
132 	if (srev < AR5K_SREV_AR5311)
133 		ah->ah_version = AR5K_AR5210;
134 	else if (srev < AR5K_SREV_AR5212)
135 		ah->ah_version = AR5K_AR5211;
136 	else
137 		ah->ah_version = AR5K_AR5212;
138 
139 	/* Fill the ath5k_hw struct with the needed functions */
140 	ret = ath5k_hw_init_desc_functions(ah);
141 	if (ret)
142 		goto err_free;
143 
144 	/* Bring device out of sleep and reset its units */
145 	ret = ath5k_hw_nic_wakeup(ah, 0, true);
146 	if (ret)
147 		goto err_free;
148 
149 	/* Get MAC, PHY and RADIO revisions */
150 	ah->ah_mac_srev = srev;
151 	ah->ah_mac_version = AR5K_REG_MS(srev, AR5K_SREV_VER);
152 	ah->ah_phy_revision = ath5k_hw_reg_read(ah, AR5K_PHY_CHIP_ID) &
153 			0xffffffff;
154 	ah->ah_radio_5ghz_revision = ath5k_hw_radio_revision(ah,
155 			CHANNEL_5GHZ);
156 	ah->ah_phy = AR5K_PHY(0);
157 
158 	/* Try to identify radio chip based on its srev */
159 	switch (ah->ah_radio_5ghz_revision & 0xf0) {
160 	case AR5K_SREV_RAD_5111:
161 		ah->ah_radio = AR5K_RF5111;
162 		ah->ah_single_chip = false;
163 		ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
164 							CHANNEL_2GHZ);
165 		break;
166 	case AR5K_SREV_RAD_5112:
167 	case AR5K_SREV_RAD_2112:
168 		ah->ah_radio = AR5K_RF5112;
169 		ah->ah_single_chip = false;
170 		ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
171 							CHANNEL_2GHZ);
172 		break;
173 	case AR5K_SREV_RAD_2413:
174 		ah->ah_radio = AR5K_RF2413;
175 		ah->ah_single_chip = true;
176 		break;
177 	case AR5K_SREV_RAD_5413:
178 		ah->ah_radio = AR5K_RF5413;
179 		ah->ah_single_chip = true;
180 		break;
181 	case AR5K_SREV_RAD_2316:
182 		ah->ah_radio = AR5K_RF2316;
183 		ah->ah_single_chip = true;
184 		break;
185 	case AR5K_SREV_RAD_2317:
186 		ah->ah_radio = AR5K_RF2317;
187 		ah->ah_single_chip = true;
188 		break;
189 	case AR5K_SREV_RAD_5424:
190 		if (ah->ah_mac_version == AR5K_SREV_AR2425 ||
191 		ah->ah_mac_version == AR5K_SREV_AR2417){
192 			ah->ah_radio = AR5K_RF2425;
193 			ah->ah_single_chip = true;
194 		} else {
195 			ah->ah_radio = AR5K_RF5413;
196 			ah->ah_single_chip = true;
197 		}
198 		break;
199 	default:
200 		/* Identify radio based on mac/phy srev */
201 		if (ah->ah_version == AR5K_AR5210) {
202 			ah->ah_radio = AR5K_RF5110;
203 			ah->ah_single_chip = false;
204 		} else if (ah->ah_version == AR5K_AR5211) {
205 			ah->ah_radio = AR5K_RF5111;
206 			ah->ah_single_chip = false;
207 			ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
208 								CHANNEL_2GHZ);
209 		} else if (ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4) ||
210 		ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4) ||
211 		ah->ah_phy_revision == AR5K_SREV_PHY_2425) {
212 			ah->ah_radio = AR5K_RF2425;
213 			ah->ah_single_chip = true;
214 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2425;
215 		} else if (srev == AR5K_SREV_AR5213A &&
216 		ah->ah_phy_revision == AR5K_SREV_PHY_5212B) {
217 			ah->ah_radio = AR5K_RF5112;
218 			ah->ah_single_chip = false;
219 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5112B;
220 		} else if (ah->ah_mac_version == (AR5K_SREV_AR2415 >> 4)) {
221 			ah->ah_radio = AR5K_RF2316;
222 			ah->ah_single_chip = true;
223 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2316;
224 		} else if (ah->ah_mac_version == (AR5K_SREV_AR5414 >> 4) ||
225 		ah->ah_phy_revision == AR5K_SREV_PHY_5413) {
226 			ah->ah_radio = AR5K_RF5413;
227 			ah->ah_single_chip = true;
228 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5413;
229 		} else if (ah->ah_mac_version == (AR5K_SREV_AR2414 >> 4) ||
230 		ah->ah_phy_revision == AR5K_SREV_PHY_2413) {
231 			ah->ah_radio = AR5K_RF2413;
232 			ah->ah_single_chip = true;
233 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2413;
234 		} else {
235 			ATH5K_ERR(sc, "Couldn't identify radio revision.\n");
236 			ret = -ENODEV;
237 			goto err_free;
238 		}
239 	}
240 
241 
242 	/* Return on unsuported chips (unsupported eeprom etc) */
243 	if ((srev >= AR5K_SREV_AR5416) &&
244 	(srev < AR5K_SREV_AR2425)) {
245 		ATH5K_ERR(sc, "Device not yet supported.\n");
246 		ret = -ENODEV;
247 		goto err_free;
248 	}
249 
250 	/*
251 	 * POST
252 	 */
253 	ret = ath5k_hw_post(ah);
254 	if (ret)
255 		goto err_free;
256 
257 	/* Enable pci core retry fix on Hainan (5213A) and later chips */
258 	if (srev >= AR5K_SREV_AR5213A)
259 		AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_RETRY_FIX);
260 
261 	/*
262 	 * Get card capabilities, calibration values etc
263 	 * TODO: EEPROM work
264 	 */
265 	ret = ath5k_eeprom_init(ah);
266 	if (ret) {
267 		ATH5K_ERR(sc, "unable to init EEPROM\n");
268 		goto err_free;
269 	}
270 
271 	ee = &ah->ah_capabilities.cap_eeprom;
272 
273 	/*
274 	 * Write PCI-E power save settings
275 	 */
276 	if ((ah->ah_version == AR5K_AR5212) && (pdev->is_pcie)) {
277 		ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES);
278 		ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES);
279 
280 		/* Shut off RX when elecidle is asserted */
281 		ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES);
282 		ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES);
283 
284 		/* If serdes programing is enabled, increase PCI-E
285 		 * tx power for systems with long trace from host
286 		 * to minicard connector. */
287 		if (ee->ee_serdes)
288 			ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES);
289 		else
290 			ath5k_hw_reg_write(ah, 0xf6800579, AR5K_PCIE_SERDES);
291 
292 		/* Shut off PLL and CLKREQ active in L1 */
293 		ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES);
294 
295 		/* Preserve other settings */
296 		ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES);
297 		ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES);
298 		ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES);
299 
300 		/* Reset SERDES to load new settings */
301 		ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET);
302 		mdelay(1);
303 	}
304 
305 	/* Get misc capabilities */
306 	ret = ath5k_hw_set_capabilities(ah);
307 	if (ret) {
308 		ATH5K_ERR(sc, "unable to get device capabilities: 0x%04x\n",
309 			sc->pdev->device);
310 		goto err_free;
311 	}
312 
313 	/* Crypto settings */
314 	common->keymax = (sc->ah->ah_version == AR5K_AR5210 ?
315 			  AR5K_KEYTABLE_SIZE_5210 : AR5K_KEYTABLE_SIZE_5211);
316 
317 	if (srev >= AR5K_SREV_AR5212_V4 &&
318 	    (ee->ee_version >= AR5K_EEPROM_VERSION_5_0 &&
319 	    !AR5K_EEPROM_AES_DIS(ee->ee_misc5)))
320 		common->crypt_caps |= ATH_CRYPT_CAP_CIPHER_AESCCM;
321 
322 	if (srev >= AR5K_SREV_AR2414) {
323 		common->crypt_caps |= ATH_CRYPT_CAP_MIC_COMBINED;
324 		AR5K_REG_ENABLE_BITS(ah, AR5K_MISC_MODE,
325 			AR5K_MISC_MODE_COMBINED_MIC);
326 	}
327 
328 	/* MAC address is cleared until add_interface */
329 	ath5k_hw_set_lladdr(ah, (u8[ETH_ALEN]){});
330 
331 	/* Set BSSID to bcast address: ff:ff:ff:ff:ff:ff for now */
332 	memcpy(common->curbssid, ath_bcast_mac, ETH_ALEN);
333 	ath5k_hw_set_bssid(ah);
334 	ath5k_hw_set_opmode(ah, sc->opmode);
335 
336 	ath5k_hw_rfgain_opt_init(ah);
337 
338 	ath5k_hw_init_nfcal_hist(ah);
339 
340 	/* turn on HW LEDs */
341 	ath5k_hw_set_ledstate(ah, AR5K_LED_INIT);
342 
343 	return 0;
344 err_free:
345 	kfree(ah);
346 	return ret;
347 }
348 
349 /**
350  * ath5k_hw_detach - Free the ath5k_hw struct
351  *
352  * @ah: The &struct ath5k_hw
353  */
354 void ath5k_hw_detach(struct ath5k_hw *ah)
355 {
356 	__set_bit(ATH_STAT_INVALID, ah->ah_sc->status);
357 
358 	if (ah->ah_rf_banks != NULL)
359 		kfree(ah->ah_rf_banks);
360 
361 	ath5k_eeprom_detach(ah);
362 
363 	/* assume interrupts are down */
364 }
365