1 /*
2  * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
3  * Copyright (c) 2006-2009 Nick Kossifidis <mickflemm@gmail.com>
4  * Copyright (c) 2008-2009 Felix Fietkau <nbd@openwrt.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  *
18  */
19 
20 /*************************************\
21 * EEPROM access functions and helpers *
22 \*************************************/
23 
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 
26 #include <linux/slab.h>
27 
28 #include "ath5k.h"
29 #include "reg.h"
30 #include "debug.h"
31 
32 
33 /******************\
34 * Helper functions *
35 \******************/
36 
37 /*
38  * Translate binary channel representation in EEPROM to frequency
39  */
ath5k_eeprom_bin2freq(struct ath5k_eeprom_info * ee,u16 bin,unsigned int mode)40 static u16 ath5k_eeprom_bin2freq(struct ath5k_eeprom_info *ee, u16 bin,
41 							unsigned int mode)
42 {
43 	u16 val;
44 
45 	if (bin == AR5K_EEPROM_CHANNEL_DIS)
46 		return bin;
47 
48 	if (mode == AR5K_EEPROM_MODE_11A) {
49 		if (ee->ee_version > AR5K_EEPROM_VERSION_3_2)
50 			val = (5 * bin) + 4800;
51 		else
52 			val = bin > 62 ? (10 * 62) + (5 * (bin - 62)) + 5100 :
53 				(bin * 10) + 5100;
54 	} else {
55 		if (ee->ee_version > AR5K_EEPROM_VERSION_3_2)
56 			val = bin + 2300;
57 		else
58 			val = bin + 2400;
59 	}
60 
61 	return val;
62 }
63 
64 
65 /*********\
66 * Parsers *
67 \*********/
68 
69 /*
70  * Initialize eeprom & capabilities structs
71  */
72 static int
ath5k_eeprom_init_header(struct ath5k_hw * ah)73 ath5k_eeprom_init_header(struct ath5k_hw *ah)
74 {
75 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
76 	u16 val;
77 	u32 cksum, offset, eep_max = AR5K_EEPROM_INFO_MAX;
78 
79 	/*
80 	 * Read values from EEPROM and store them in the capability structure
81 	 */
82 	AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MAGIC, ee_magic);
83 	AR5K_EEPROM_READ_HDR(AR5K_EEPROM_PROTECT, ee_protect);
84 	AR5K_EEPROM_READ_HDR(AR5K_EEPROM_REG_DOMAIN, ee_regdomain);
85 	AR5K_EEPROM_READ_HDR(AR5K_EEPROM_VERSION, ee_version);
86 	AR5K_EEPROM_READ_HDR(AR5K_EEPROM_HDR, ee_header);
87 
88 	/* Return if we have an old EEPROM */
89 	if (ah->ah_ee_version < AR5K_EEPROM_VERSION_3_0)
90 		return 0;
91 
92 	/*
93 	 * Validate the checksum of the EEPROM date. There are some
94 	 * devices with invalid EEPROMs.
95 	 */
96 	AR5K_EEPROM_READ(AR5K_EEPROM_SIZE_UPPER, val);
97 	if (val) {
98 		eep_max = (val & AR5K_EEPROM_SIZE_UPPER_MASK) <<
99 			   AR5K_EEPROM_SIZE_ENDLOC_SHIFT;
100 		AR5K_EEPROM_READ(AR5K_EEPROM_SIZE_LOWER, val);
101 		eep_max = (eep_max | val) - AR5K_EEPROM_INFO_BASE;
102 
103 		/*
104 		 * Fail safe check to prevent stupid loops due
105 		 * to busted EEPROMs. XXX: This value is likely too
106 		 * big still, waiting on a better value.
107 		 */
108 		if (eep_max > (3 * AR5K_EEPROM_INFO_MAX)) {
109 			ATH5K_ERR(ah, "Invalid max custom EEPROM size: "
110 				  "%d (0x%04x) max expected: %d (0x%04x)\n",
111 				  eep_max, eep_max,
112 				  3 * AR5K_EEPROM_INFO_MAX,
113 				  3 * AR5K_EEPROM_INFO_MAX);
114 			return -EIO;
115 		}
116 	}
117 
118 	for (cksum = 0, offset = 0; offset < eep_max; offset++) {
119 		AR5K_EEPROM_READ(AR5K_EEPROM_INFO(offset), val);
120 		cksum ^= val;
121 	}
122 	if (cksum != AR5K_EEPROM_INFO_CKSUM) {
123 		ATH5K_ERR(ah, "Invalid EEPROM "
124 			  "checksum: 0x%04x eep_max: 0x%04x (%s)\n",
125 			  cksum, eep_max,
126 			  eep_max == AR5K_EEPROM_INFO_MAX ?
127 				"default size" : "custom size");
128 		return -EIO;
129 	}
130 
131 	AR5K_EEPROM_READ_HDR(AR5K_EEPROM_ANT_GAIN(ah->ah_ee_version),
132 	    ee_ant_gain);
133 
134 	if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0) {
135 		AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC0, ee_misc0);
136 		AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC1, ee_misc1);
137 
138 		/* XXX: Don't know which versions include these two */
139 		AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC2, ee_misc2);
140 
141 		if (ee->ee_version >= AR5K_EEPROM_VERSION_4_3)
142 			AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC3, ee_misc3);
143 
144 		if (ee->ee_version >= AR5K_EEPROM_VERSION_5_0) {
145 			AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC4, ee_misc4);
146 			AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC5, ee_misc5);
147 			AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC6, ee_misc6);
148 		}
149 	}
150 
151 	if (ah->ah_ee_version < AR5K_EEPROM_VERSION_3_3) {
152 		AR5K_EEPROM_READ(AR5K_EEPROM_OBDB0_2GHZ, val);
153 		ee->ee_ob[AR5K_EEPROM_MODE_11B][0] = val & 0x7;
154 		ee->ee_db[AR5K_EEPROM_MODE_11B][0] = (val >> 3) & 0x7;
155 
156 		AR5K_EEPROM_READ(AR5K_EEPROM_OBDB1_2GHZ, val);
157 		ee->ee_ob[AR5K_EEPROM_MODE_11G][0] = val & 0x7;
158 		ee->ee_db[AR5K_EEPROM_MODE_11G][0] = (val >> 3) & 0x7;
159 	}
160 
161 	AR5K_EEPROM_READ(AR5K_EEPROM_IS_HB63, val);
162 
163 	if ((ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4)) && val)
164 		ee->ee_is_hb63 = true;
165 	else
166 		ee->ee_is_hb63 = false;
167 
168 	AR5K_EEPROM_READ(AR5K_EEPROM_RFKILL, val);
169 	ee->ee_rfkill_pin = (u8) AR5K_REG_MS(val, AR5K_EEPROM_RFKILL_GPIO_SEL);
170 	ee->ee_rfkill_pol = val & AR5K_EEPROM_RFKILL_POLARITY ? true : false;
171 
172 	/* Check if PCIE_OFFSET points to PCIE_SERDES_SECTION
173 	 * and enable serdes programming if needed.
174 	 *
175 	 * XXX: Serdes values seem to be fixed so
176 	 * no need to read them here, we write them
177 	 * during ath5k_hw_init */
178 	AR5K_EEPROM_READ(AR5K_EEPROM_PCIE_OFFSET, val);
179 	ee->ee_serdes = (val == AR5K_EEPROM_PCIE_SERDES_SECTION) ?
180 							true : false;
181 
182 	return 0;
183 }
184 
185 
186 /*
187  * Read antenna infos from eeprom
188  */
ath5k_eeprom_read_ants(struct ath5k_hw * ah,u32 * offset,unsigned int mode)189 static int ath5k_eeprom_read_ants(struct ath5k_hw *ah, u32 *offset,
190 		unsigned int mode)
191 {
192 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
193 	u32 o = *offset;
194 	u16 val;
195 	int i = 0;
196 
197 	AR5K_EEPROM_READ(o++, val);
198 	ee->ee_switch_settling[mode]	= (val >> 8) & 0x7f;
199 	ee->ee_atn_tx_rx[mode]		= (val >> 2) & 0x3f;
200 	ee->ee_ant_control[mode][i]	= (val << 4) & 0x3f;
201 
202 	AR5K_EEPROM_READ(o++, val);
203 	ee->ee_ant_control[mode][i++]	|= (val >> 12) & 0xf;
204 	ee->ee_ant_control[mode][i++]	= (val >> 6) & 0x3f;
205 	ee->ee_ant_control[mode][i++]	= val & 0x3f;
206 
207 	AR5K_EEPROM_READ(o++, val);
208 	ee->ee_ant_control[mode][i++]	= (val >> 10) & 0x3f;
209 	ee->ee_ant_control[mode][i++]	= (val >> 4) & 0x3f;
210 	ee->ee_ant_control[mode][i]	= (val << 2) & 0x3f;
211 
212 	AR5K_EEPROM_READ(o++, val);
213 	ee->ee_ant_control[mode][i++]	|= (val >> 14) & 0x3;
214 	ee->ee_ant_control[mode][i++]	= (val >> 8) & 0x3f;
215 	ee->ee_ant_control[mode][i++]	= (val >> 2) & 0x3f;
216 	ee->ee_ant_control[mode][i]	= (val << 4) & 0x3f;
217 
218 	AR5K_EEPROM_READ(o++, val);
219 	ee->ee_ant_control[mode][i++]	|= (val >> 12) & 0xf;
220 	ee->ee_ant_control[mode][i++]	= (val >> 6) & 0x3f;
221 	ee->ee_ant_control[mode][i++]	= val & 0x3f;
222 
223 	/* Get antenna switch tables */
224 	ah->ah_ant_ctl[mode][AR5K_ANT_CTL] =
225 	    (ee->ee_ant_control[mode][0] << 4);
226 	ah->ah_ant_ctl[mode][AR5K_ANT_SWTABLE_A] =
227 	     ee->ee_ant_control[mode][1]	|
228 	    (ee->ee_ant_control[mode][2] << 6)	|
229 	    (ee->ee_ant_control[mode][3] << 12) |
230 	    (ee->ee_ant_control[mode][4] << 18) |
231 	    (ee->ee_ant_control[mode][5] << 24);
232 	ah->ah_ant_ctl[mode][AR5K_ANT_SWTABLE_B] =
233 	     ee->ee_ant_control[mode][6]	|
234 	    (ee->ee_ant_control[mode][7] << 6)	|
235 	    (ee->ee_ant_control[mode][8] << 12) |
236 	    (ee->ee_ant_control[mode][9] << 18) |
237 	    (ee->ee_ant_control[mode][10] << 24);
238 
239 	/* return new offset */
240 	*offset = o;
241 
242 	return 0;
243 }
244 
245 /*
246  * Read supported modes and some mode-specific calibration data
247  * from eeprom
248  */
ath5k_eeprom_read_modes(struct ath5k_hw * ah,u32 * offset,unsigned int mode)249 static int ath5k_eeprom_read_modes(struct ath5k_hw *ah, u32 *offset,
250 		unsigned int mode)
251 {
252 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
253 	u32 o = *offset;
254 	u16 val;
255 
256 	ee->ee_n_piers[mode] = 0;
257 	AR5K_EEPROM_READ(o++, val);
258 	ee->ee_adc_desired_size[mode]	= (s8)((val >> 8) & 0xff);
259 	switch (mode) {
260 	case AR5K_EEPROM_MODE_11A:
261 		ee->ee_ob[mode][3]	= (val >> 5) & 0x7;
262 		ee->ee_db[mode][3]	= (val >> 2) & 0x7;
263 		ee->ee_ob[mode][2]	= (val << 1) & 0x7;
264 
265 		AR5K_EEPROM_READ(o++, val);
266 		ee->ee_ob[mode][2]	|= (val >> 15) & 0x1;
267 		ee->ee_db[mode][2]	= (val >> 12) & 0x7;
268 		ee->ee_ob[mode][1]	= (val >> 9) & 0x7;
269 		ee->ee_db[mode][1]	= (val >> 6) & 0x7;
270 		ee->ee_ob[mode][0]	= (val >> 3) & 0x7;
271 		ee->ee_db[mode][0]	= val & 0x7;
272 		break;
273 	case AR5K_EEPROM_MODE_11G:
274 	case AR5K_EEPROM_MODE_11B:
275 		ee->ee_ob[mode][1]	= (val >> 4) & 0x7;
276 		ee->ee_db[mode][1]	= val & 0x7;
277 		break;
278 	}
279 
280 	AR5K_EEPROM_READ(o++, val);
281 	ee->ee_tx_end2xlna_enable[mode]	= (val >> 8) & 0xff;
282 	ee->ee_thr_62[mode]		= val & 0xff;
283 
284 	if (ah->ah_ee_version <= AR5K_EEPROM_VERSION_3_2)
285 		ee->ee_thr_62[mode] = mode == AR5K_EEPROM_MODE_11A ? 15 : 28;
286 
287 	AR5K_EEPROM_READ(o++, val);
288 	ee->ee_tx_end2xpa_disable[mode]	= (val >> 8) & 0xff;
289 	ee->ee_tx_frm2xpa_enable[mode]	= val & 0xff;
290 
291 	AR5K_EEPROM_READ(o++, val);
292 	ee->ee_pga_desired_size[mode]	= (val >> 8) & 0xff;
293 
294 	if ((val & 0xff) & 0x80)
295 		ee->ee_noise_floor_thr[mode] = -((((val & 0xff) ^ 0xff)) + 1);
296 	else
297 		ee->ee_noise_floor_thr[mode] = val & 0xff;
298 
299 	if (ah->ah_ee_version <= AR5K_EEPROM_VERSION_3_2)
300 		ee->ee_noise_floor_thr[mode] =
301 		    mode == AR5K_EEPROM_MODE_11A ? -54 : -1;
302 
303 	AR5K_EEPROM_READ(o++, val);
304 	ee->ee_xlna_gain[mode]		= (val >> 5) & 0xff;
305 	ee->ee_x_gain[mode]		= (val >> 1) & 0xf;
306 	ee->ee_xpd[mode]		= val & 0x1;
307 
308 	if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0 &&
309 	    mode != AR5K_EEPROM_MODE_11B)
310 		ee->ee_fixed_bias[mode] = (val >> 13) & 0x1;
311 
312 	if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_3_3) {
313 		AR5K_EEPROM_READ(o++, val);
314 		ee->ee_false_detect[mode] = (val >> 6) & 0x7f;
315 
316 		if (mode == AR5K_EEPROM_MODE_11A)
317 			ee->ee_xr_power[mode] = val & 0x3f;
318 		else {
319 			/* b_DB_11[bg] and b_OB_11[bg] */
320 			ee->ee_ob[mode][0] = val & 0x7;
321 			ee->ee_db[mode][0] = (val >> 3) & 0x7;
322 		}
323 	}
324 
325 	if (ah->ah_ee_version < AR5K_EEPROM_VERSION_3_4) {
326 		ee->ee_i_gain[mode] = AR5K_EEPROM_I_GAIN;
327 		ee->ee_cck_ofdm_power_delta = AR5K_EEPROM_CCK_OFDM_DELTA;
328 	} else {
329 		ee->ee_i_gain[mode] = (val >> 13) & 0x7;
330 
331 		AR5K_EEPROM_READ(o++, val);
332 		ee->ee_i_gain[mode] |= (val << 3) & 0x38;
333 
334 		if (mode == AR5K_EEPROM_MODE_11G) {
335 			ee->ee_cck_ofdm_power_delta = (val >> 3) & 0xff;
336 			if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_6)
337 				ee->ee_scaled_cck_delta = (val >> 11) & 0x1f;
338 		}
339 	}
340 
341 	if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0 &&
342 			mode == AR5K_EEPROM_MODE_11A) {
343 		ee->ee_i_cal[mode] = (val >> 8) & 0x3f;
344 		ee->ee_q_cal[mode] = (val >> 3) & 0x1f;
345 	}
346 
347 	if (ah->ah_ee_version < AR5K_EEPROM_VERSION_4_0)
348 		goto done;
349 
350 	/* Note: >= v5 have bg freq piers on another location
351 	 * so these freq piers are ignored for >= v5 (should be 0xff
352 	 * anyway) */
353 	switch (mode) {
354 	case AR5K_EEPROM_MODE_11A:
355 		if (ah->ah_ee_version < AR5K_EEPROM_VERSION_4_1)
356 			break;
357 
358 		AR5K_EEPROM_READ(o++, val);
359 		ee->ee_margin_tx_rx[mode] = val & 0x3f;
360 		break;
361 	case AR5K_EEPROM_MODE_11B:
362 		AR5K_EEPROM_READ(o++, val);
363 
364 		ee->ee_pwr_cal_b[0].freq =
365 			ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
366 		if (ee->ee_pwr_cal_b[0].freq != AR5K_EEPROM_CHANNEL_DIS)
367 			ee->ee_n_piers[mode]++;
368 
369 		ee->ee_pwr_cal_b[1].freq =
370 			ath5k_eeprom_bin2freq(ee, (val >> 8) & 0xff, mode);
371 		if (ee->ee_pwr_cal_b[1].freq != AR5K_EEPROM_CHANNEL_DIS)
372 			ee->ee_n_piers[mode]++;
373 
374 		AR5K_EEPROM_READ(o++, val);
375 		ee->ee_pwr_cal_b[2].freq =
376 			ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
377 		if (ee->ee_pwr_cal_b[2].freq != AR5K_EEPROM_CHANNEL_DIS)
378 			ee->ee_n_piers[mode]++;
379 
380 		if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_1)
381 			ee->ee_margin_tx_rx[mode] = (val >> 8) & 0x3f;
382 		break;
383 	case AR5K_EEPROM_MODE_11G:
384 		AR5K_EEPROM_READ(o++, val);
385 
386 		ee->ee_pwr_cal_g[0].freq =
387 			ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
388 		if (ee->ee_pwr_cal_g[0].freq != AR5K_EEPROM_CHANNEL_DIS)
389 			ee->ee_n_piers[mode]++;
390 
391 		ee->ee_pwr_cal_g[1].freq =
392 			ath5k_eeprom_bin2freq(ee, (val >> 8) & 0xff, mode);
393 		if (ee->ee_pwr_cal_g[1].freq != AR5K_EEPROM_CHANNEL_DIS)
394 			ee->ee_n_piers[mode]++;
395 
396 		AR5K_EEPROM_READ(o++, val);
397 		ee->ee_turbo_max_power[mode] = val & 0x7f;
398 		ee->ee_xr_power[mode] = (val >> 7) & 0x3f;
399 
400 		AR5K_EEPROM_READ(o++, val);
401 		ee->ee_pwr_cal_g[2].freq =
402 			ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
403 		if (ee->ee_pwr_cal_g[2].freq != AR5K_EEPROM_CHANNEL_DIS)
404 			ee->ee_n_piers[mode]++;
405 
406 		if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_1)
407 			ee->ee_margin_tx_rx[mode] = (val >> 8) & 0x3f;
408 
409 		AR5K_EEPROM_READ(o++, val);
410 		ee->ee_i_cal[mode] = (val >> 5) & 0x3f;
411 		ee->ee_q_cal[mode] = val & 0x1f;
412 
413 		if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_2) {
414 			AR5K_EEPROM_READ(o++, val);
415 			ee->ee_cck_ofdm_gain_delta = val & 0xff;
416 		}
417 		break;
418 	}
419 
420 	/*
421 	 * Read turbo mode information on newer EEPROM versions
422 	 */
423 	if (ee->ee_version < AR5K_EEPROM_VERSION_5_0)
424 		goto done;
425 
426 	switch (mode) {
427 	case AR5K_EEPROM_MODE_11A:
428 		ee->ee_switch_settling_turbo[mode] = (val >> 6) & 0x7f;
429 
430 		ee->ee_atn_tx_rx_turbo[mode] = (val >> 13) & 0x7;
431 		AR5K_EEPROM_READ(o++, val);
432 		ee->ee_atn_tx_rx_turbo[mode] |= (val & 0x7) << 3;
433 		ee->ee_margin_tx_rx_turbo[mode] = (val >> 3) & 0x3f;
434 
435 		ee->ee_adc_desired_size_turbo[mode] = (val >> 9) & 0x7f;
436 		AR5K_EEPROM_READ(o++, val);
437 		ee->ee_adc_desired_size_turbo[mode] |= (val & 0x1) << 7;
438 		ee->ee_pga_desired_size_turbo[mode] = (val >> 1) & 0xff;
439 
440 		if (AR5K_EEPROM_EEMAP(ee->ee_misc0) >= 2)
441 			ee->ee_pd_gain_overlap = (val >> 9) & 0xf;
442 		break;
443 	case AR5K_EEPROM_MODE_11G:
444 		ee->ee_switch_settling_turbo[mode] = (val >> 8) & 0x7f;
445 
446 		ee->ee_atn_tx_rx_turbo[mode] = (val >> 15) & 0x7;
447 		AR5K_EEPROM_READ(o++, val);
448 		ee->ee_atn_tx_rx_turbo[mode] |= (val & 0x1f) << 1;
449 		ee->ee_margin_tx_rx_turbo[mode] = (val >> 5) & 0x3f;
450 
451 		ee->ee_adc_desired_size_turbo[mode] = (val >> 11) & 0x7f;
452 		AR5K_EEPROM_READ(o++, val);
453 		ee->ee_adc_desired_size_turbo[mode] |= (val & 0x7) << 5;
454 		ee->ee_pga_desired_size_turbo[mode] = (val >> 3) & 0xff;
455 		break;
456 	}
457 
458 done:
459 	/* return new offset */
460 	*offset = o;
461 
462 	return 0;
463 }
464 
465 /* Read mode-specific data (except power calibration data) */
466 static int
ath5k_eeprom_init_modes(struct ath5k_hw * ah)467 ath5k_eeprom_init_modes(struct ath5k_hw *ah)
468 {
469 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
470 	u32 mode_offset[3];
471 	unsigned int mode;
472 	u32 offset;
473 	int ret;
474 
475 	/*
476 	 * Get values for all modes
477 	 */
478 	mode_offset[AR5K_EEPROM_MODE_11A] = AR5K_EEPROM_MODES_11A(ah->ah_ee_version);
479 	mode_offset[AR5K_EEPROM_MODE_11B] = AR5K_EEPROM_MODES_11B(ah->ah_ee_version);
480 	mode_offset[AR5K_EEPROM_MODE_11G] = AR5K_EEPROM_MODES_11G(ah->ah_ee_version);
481 
482 	ee->ee_turbo_max_power[AR5K_EEPROM_MODE_11A] =
483 		AR5K_EEPROM_HDR_T_5GHZ_DBM(ee->ee_header);
484 
485 	for (mode = AR5K_EEPROM_MODE_11A; mode <= AR5K_EEPROM_MODE_11G; mode++) {
486 		offset = mode_offset[mode];
487 
488 		ret = ath5k_eeprom_read_ants(ah, &offset, mode);
489 		if (ret)
490 			return ret;
491 
492 		ret = ath5k_eeprom_read_modes(ah, &offset, mode);
493 		if (ret)
494 			return ret;
495 	}
496 
497 	/* override for older eeprom versions for better performance */
498 	if (ah->ah_ee_version <= AR5K_EEPROM_VERSION_3_2) {
499 		ee->ee_thr_62[AR5K_EEPROM_MODE_11A] = 15;
500 		ee->ee_thr_62[AR5K_EEPROM_MODE_11B] = 28;
501 		ee->ee_thr_62[AR5K_EEPROM_MODE_11G] = 28;
502 	}
503 
504 	return 0;
505 }
506 
507 /* Read the frequency piers for each mode (mostly used on newer eeproms with 0xff
508  * frequency mask) */
509 static inline int
ath5k_eeprom_read_freq_list(struct ath5k_hw * ah,int * offset,int max,struct ath5k_chan_pcal_info * pc,unsigned int mode)510 ath5k_eeprom_read_freq_list(struct ath5k_hw *ah, int *offset, int max,
511 			struct ath5k_chan_pcal_info *pc, unsigned int mode)
512 {
513 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
514 	int o = *offset;
515 	int i = 0;
516 	u8 freq1, freq2;
517 	u16 val;
518 
519 	ee->ee_n_piers[mode] = 0;
520 	while (i < max) {
521 		AR5K_EEPROM_READ(o++, val);
522 
523 		freq1 = val & 0xff;
524 		if (!freq1)
525 			break;
526 
527 		pc[i++].freq = ath5k_eeprom_bin2freq(ee,
528 				freq1, mode);
529 		ee->ee_n_piers[mode]++;
530 
531 		freq2 = (val >> 8) & 0xff;
532 		if (!freq2 || i >= max)
533 			break;
534 
535 		pc[i++].freq = ath5k_eeprom_bin2freq(ee,
536 				freq2, mode);
537 		ee->ee_n_piers[mode]++;
538 	}
539 
540 	/* return new offset */
541 	*offset = o;
542 
543 	return 0;
544 }
545 
546 /* Read frequency piers for 802.11a */
547 static int
ath5k_eeprom_init_11a_pcal_freq(struct ath5k_hw * ah,int offset)548 ath5k_eeprom_init_11a_pcal_freq(struct ath5k_hw *ah, int offset)
549 {
550 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
551 	struct ath5k_chan_pcal_info *pcal = ee->ee_pwr_cal_a;
552 	int i;
553 	u16 val;
554 	u8 mask;
555 
556 	if (ee->ee_version >= AR5K_EEPROM_VERSION_3_3) {
557 		ath5k_eeprom_read_freq_list(ah, &offset,
558 			AR5K_EEPROM_N_5GHZ_CHAN, pcal,
559 			AR5K_EEPROM_MODE_11A);
560 	} else {
561 		mask = AR5K_EEPROM_FREQ_M(ah->ah_ee_version);
562 
563 		AR5K_EEPROM_READ(offset++, val);
564 		pcal[0].freq  = (val >> 9) & mask;
565 		pcal[1].freq  = (val >> 2) & mask;
566 		pcal[2].freq  = (val << 5) & mask;
567 
568 		AR5K_EEPROM_READ(offset++, val);
569 		pcal[2].freq |= (val >> 11) & 0x1f;
570 		pcal[3].freq  = (val >> 4) & mask;
571 		pcal[4].freq  = (val << 3) & mask;
572 
573 		AR5K_EEPROM_READ(offset++, val);
574 		pcal[4].freq |= (val >> 13) & 0x7;
575 		pcal[5].freq  = (val >> 6) & mask;
576 		pcal[6].freq  = (val << 1) & mask;
577 
578 		AR5K_EEPROM_READ(offset++, val);
579 		pcal[6].freq |= (val >> 15) & 0x1;
580 		pcal[7].freq  = (val >> 8) & mask;
581 		pcal[8].freq  = (val >> 1) & mask;
582 		pcal[9].freq  = (val << 6) & mask;
583 
584 		AR5K_EEPROM_READ(offset++, val);
585 		pcal[9].freq |= (val >> 10) & 0x3f;
586 
587 		/* Fixed number of piers */
588 		ee->ee_n_piers[AR5K_EEPROM_MODE_11A] = 10;
589 
590 		for (i = 0; i < AR5K_EEPROM_N_5GHZ_CHAN; i++) {
591 			pcal[i].freq = ath5k_eeprom_bin2freq(ee,
592 				pcal[i].freq, AR5K_EEPROM_MODE_11A);
593 		}
594 	}
595 
596 	return 0;
597 }
598 
599 /* Read frequency piers for 802.11bg on eeprom versions >= 5 and eemap >= 2 */
600 static inline int
ath5k_eeprom_init_11bg_2413(struct ath5k_hw * ah,unsigned int mode,int offset)601 ath5k_eeprom_init_11bg_2413(struct ath5k_hw *ah, unsigned int mode, int offset)
602 {
603 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
604 	struct ath5k_chan_pcal_info *pcal;
605 
606 	switch (mode) {
607 	case AR5K_EEPROM_MODE_11B:
608 		pcal = ee->ee_pwr_cal_b;
609 		break;
610 	case AR5K_EEPROM_MODE_11G:
611 		pcal = ee->ee_pwr_cal_g;
612 		break;
613 	default:
614 		return -EINVAL;
615 	}
616 
617 	ath5k_eeprom_read_freq_list(ah, &offset,
618 		AR5K_EEPROM_N_2GHZ_CHAN_2413, pcal,
619 		mode);
620 
621 	return 0;
622 }
623 
624 
625 /*
626  * Read power calibration for RF5111 chips
627  *
628  * For RF5111 we have an XPD -eXternal Power Detector- curve
629  * for each calibrated channel. Each curve has 0,5dB Power steps
630  * on x axis and PCDAC steps (offsets) on y axis and looks like an
631  * exponential function. To recreate the curve we read 11 points
632  * here and interpolate later.
633  */
634 
635 /* Used to match PCDAC steps with power values on RF5111 chips
636  * (eeprom versions < 4). For RF5111 we have 11 pre-defined PCDAC
637  * steps that match with the power values we read from eeprom. On
638  * older eeprom versions (< 3.2) these steps are equally spaced at
639  * 10% of the pcdac curve -until the curve reaches its maximum-
640  * (11 steps from 0 to 100%) but on newer eeprom versions (>= 3.2)
641  * these 11 steps are spaced in a different way. This function returns
642  * the pcdac steps based on eeprom version and curve min/max so that we
643  * can have pcdac/pwr points.
644  */
645 static inline void
ath5k_get_pcdac_intercepts(struct ath5k_hw * ah,u8 min,u8 max,u8 * vp)646 ath5k_get_pcdac_intercepts(struct ath5k_hw *ah, u8 min, u8 max, u8 *vp)
647 {
648 	static const u16 intercepts3[] = {
649 		0, 5, 10, 20, 30, 50, 70, 85, 90, 95, 100
650 	};
651 	static const u16 intercepts3_2[] = {
652 		0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
653 	};
654 	const u16 *ip;
655 	int i;
656 
657 	if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_3_2)
658 		ip = intercepts3_2;
659 	else
660 		ip = intercepts3;
661 
662 	for (i = 0; i < ARRAY_SIZE(intercepts3); i++)
663 		vp[i] = (ip[i] * max + (100 - ip[i]) * min) / 100;
664 }
665 
666 static int
ath5k_eeprom_free_pcal_info(struct ath5k_hw * ah,int mode)667 ath5k_eeprom_free_pcal_info(struct ath5k_hw *ah, int mode)
668 {
669 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
670 	struct ath5k_chan_pcal_info *chinfo;
671 	u8 pier, pdg;
672 
673 	switch (mode) {
674 	case AR5K_EEPROM_MODE_11A:
675 		if (!AR5K_EEPROM_HDR_11A(ee->ee_header))
676 			return 0;
677 		chinfo = ee->ee_pwr_cal_a;
678 		break;
679 	case AR5K_EEPROM_MODE_11B:
680 		if (!AR5K_EEPROM_HDR_11B(ee->ee_header))
681 			return 0;
682 		chinfo = ee->ee_pwr_cal_b;
683 		break;
684 	case AR5K_EEPROM_MODE_11G:
685 		if (!AR5K_EEPROM_HDR_11G(ee->ee_header))
686 			return 0;
687 		chinfo = ee->ee_pwr_cal_g;
688 		break;
689 	default:
690 		return -EINVAL;
691 	}
692 
693 	for (pier = 0; pier < ee->ee_n_piers[mode]; pier++) {
694 		if (!chinfo[pier].pd_curves)
695 			continue;
696 
697 		for (pdg = 0; pdg < AR5K_EEPROM_N_PD_CURVES; pdg++) {
698 			struct ath5k_pdgain_info *pd =
699 					&chinfo[pier].pd_curves[pdg];
700 
701 			kfree(pd->pd_step);
702 			kfree(pd->pd_pwr);
703 		}
704 
705 		kfree(chinfo[pier].pd_curves);
706 	}
707 
708 	return 0;
709 }
710 
711 /* Convert RF5111 specific data to generic raw data
712  * used by interpolation code */
713 static int
ath5k_eeprom_convert_pcal_info_5111(struct ath5k_hw * ah,int mode,struct ath5k_chan_pcal_info * chinfo)714 ath5k_eeprom_convert_pcal_info_5111(struct ath5k_hw *ah, int mode,
715 				struct ath5k_chan_pcal_info *chinfo)
716 {
717 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
718 	struct ath5k_chan_pcal_info_rf5111 *pcinfo;
719 	struct ath5k_pdgain_info *pd;
720 	u8 pier, point, idx;
721 	u8 *pdgain_idx = ee->ee_pdc_to_idx[mode];
722 
723 	/* Fill raw data for each calibration pier */
724 	for (pier = 0; pier < ee->ee_n_piers[mode]; pier++) {
725 
726 		pcinfo = &chinfo[pier].rf5111_info;
727 
728 		/* Allocate pd_curves for this cal pier */
729 		chinfo[pier].pd_curves =
730 			kcalloc(AR5K_EEPROM_N_PD_CURVES,
731 				sizeof(struct ath5k_pdgain_info),
732 				GFP_KERNEL);
733 
734 		if (!chinfo[pier].pd_curves)
735 			goto err_out;
736 
737 		/* Only one curve for RF5111
738 		 * find out which one and place
739 		 * in pd_curves.
740 		 * Note: ee_x_gain is reversed here */
741 		for (idx = 0; idx < AR5K_EEPROM_N_PD_CURVES; idx++) {
742 
743 			if (!((ee->ee_x_gain[mode] >> idx) & 0x1)) {
744 				pdgain_idx[0] = idx;
745 				break;
746 			}
747 		}
748 
749 		if (idx == AR5K_EEPROM_N_PD_CURVES)
750 			goto err_out;
751 
752 		ee->ee_pd_gains[mode] = 1;
753 
754 		pd = &chinfo[pier].pd_curves[idx];
755 
756 		pd->pd_points = AR5K_EEPROM_N_PWR_POINTS_5111;
757 
758 		/* Allocate pd points for this curve */
759 		pd->pd_step = kcalloc(AR5K_EEPROM_N_PWR_POINTS_5111,
760 					sizeof(u8), GFP_KERNEL);
761 		if (!pd->pd_step)
762 			goto err_out;
763 
764 		pd->pd_pwr = kcalloc(AR5K_EEPROM_N_PWR_POINTS_5111,
765 					sizeof(s16), GFP_KERNEL);
766 		if (!pd->pd_pwr)
767 			goto err_out;
768 
769 		/* Fill raw dataset
770 		 * (convert power to 0.25dB units
771 		 * for RF5112 compatibility) */
772 		for (point = 0; point < pd->pd_points; point++) {
773 
774 			/* Absolute values */
775 			pd->pd_pwr[point] = 2 * pcinfo->pwr[point];
776 
777 			/* Already sorted */
778 			pd->pd_step[point] = pcinfo->pcdac[point];
779 		}
780 
781 		/* Set min/max pwr */
782 		chinfo[pier].min_pwr = pd->pd_pwr[0];
783 		chinfo[pier].max_pwr = pd->pd_pwr[10];
784 
785 	}
786 
787 	return 0;
788 
789 err_out:
790 	ath5k_eeprom_free_pcal_info(ah, mode);
791 	return -ENOMEM;
792 }
793 
794 /* Parse EEPROM data */
795 static int
ath5k_eeprom_read_pcal_info_5111(struct ath5k_hw * ah,int mode)796 ath5k_eeprom_read_pcal_info_5111(struct ath5k_hw *ah, int mode)
797 {
798 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
799 	struct ath5k_chan_pcal_info *pcal;
800 	int offset, ret;
801 	int i;
802 	u16 val;
803 
804 	offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
805 	switch (mode) {
806 	case AR5K_EEPROM_MODE_11A:
807 		if (!AR5K_EEPROM_HDR_11A(ee->ee_header))
808 			return 0;
809 
810 		ret = ath5k_eeprom_init_11a_pcal_freq(ah,
811 			offset + AR5K_EEPROM_GROUP1_OFFSET);
812 		if (ret < 0)
813 			return ret;
814 
815 		offset += AR5K_EEPROM_GROUP2_OFFSET;
816 		pcal = ee->ee_pwr_cal_a;
817 		break;
818 	case AR5K_EEPROM_MODE_11B:
819 		if (!AR5K_EEPROM_HDR_11B(ee->ee_header) &&
820 		    !AR5K_EEPROM_HDR_11G(ee->ee_header))
821 			return 0;
822 
823 		pcal = ee->ee_pwr_cal_b;
824 		offset += AR5K_EEPROM_GROUP3_OFFSET;
825 
826 		/* fixed piers */
827 		pcal[0].freq = 2412;
828 		pcal[1].freq = 2447;
829 		pcal[2].freq = 2484;
830 		ee->ee_n_piers[mode] = 3;
831 		break;
832 	case AR5K_EEPROM_MODE_11G:
833 		if (!AR5K_EEPROM_HDR_11G(ee->ee_header))
834 			return 0;
835 
836 		pcal = ee->ee_pwr_cal_g;
837 		offset += AR5K_EEPROM_GROUP4_OFFSET;
838 
839 		/* fixed piers */
840 		pcal[0].freq = 2312;
841 		pcal[1].freq = 2412;
842 		pcal[2].freq = 2484;
843 		ee->ee_n_piers[mode] = 3;
844 		break;
845 	default:
846 		return -EINVAL;
847 	}
848 
849 	for (i = 0; i < ee->ee_n_piers[mode]; i++) {
850 		struct ath5k_chan_pcal_info_rf5111 *cdata =
851 			&pcal[i].rf5111_info;
852 
853 		AR5K_EEPROM_READ(offset++, val);
854 		cdata->pcdac_max = ((val >> 10) & AR5K_EEPROM_PCDAC_M);
855 		cdata->pcdac_min = ((val >> 4) & AR5K_EEPROM_PCDAC_M);
856 		cdata->pwr[0] = ((val << 2) & AR5K_EEPROM_POWER_M);
857 
858 		AR5K_EEPROM_READ(offset++, val);
859 		cdata->pwr[0] |= ((val >> 14) & 0x3);
860 		cdata->pwr[1] = ((val >> 8) & AR5K_EEPROM_POWER_M);
861 		cdata->pwr[2] = ((val >> 2) & AR5K_EEPROM_POWER_M);
862 		cdata->pwr[3] = ((val << 4) & AR5K_EEPROM_POWER_M);
863 
864 		AR5K_EEPROM_READ(offset++, val);
865 		cdata->pwr[3] |= ((val >> 12) & 0xf);
866 		cdata->pwr[4] = ((val >> 6) & AR5K_EEPROM_POWER_M);
867 		cdata->pwr[5] = (val  & AR5K_EEPROM_POWER_M);
868 
869 		AR5K_EEPROM_READ(offset++, val);
870 		cdata->pwr[6] = ((val >> 10) & AR5K_EEPROM_POWER_M);
871 		cdata->pwr[7] = ((val >> 4) & AR5K_EEPROM_POWER_M);
872 		cdata->pwr[8] = ((val << 2) & AR5K_EEPROM_POWER_M);
873 
874 		AR5K_EEPROM_READ(offset++, val);
875 		cdata->pwr[8] |= ((val >> 14) & 0x3);
876 		cdata->pwr[9] = ((val >> 8) & AR5K_EEPROM_POWER_M);
877 		cdata->pwr[10] = ((val >> 2) & AR5K_EEPROM_POWER_M);
878 
879 		ath5k_get_pcdac_intercepts(ah, cdata->pcdac_min,
880 			cdata->pcdac_max, cdata->pcdac);
881 	}
882 
883 	return ath5k_eeprom_convert_pcal_info_5111(ah, mode, pcal);
884 }
885 
886 
887 /*
888  * Read power calibration for RF5112 chips
889  *
890  * For RF5112 we have 4 XPD -eXternal Power Detector- curves
891  * for each calibrated channel on 0, -6, -12 and -18dBm but we only
892  * use the higher (3) and the lower (0) curves. Each curve has 0.5dB
893  * power steps on x axis and PCDAC steps on y axis and looks like a
894  * linear function. To recreate the curve and pass the power values
895  * on hw, we read 4 points for xpd 0 (lower gain -> max power)
896  * and 3 points for xpd 3 (higher gain -> lower power) here and
897  * interpolate later.
898  *
899  * Note: Many vendors just use xpd 0 so xpd 3 is zeroed.
900  */
901 
902 /* Convert RF5112 specific data to generic raw data
903  * used by interpolation code */
904 static int
ath5k_eeprom_convert_pcal_info_5112(struct ath5k_hw * ah,int mode,struct ath5k_chan_pcal_info * chinfo)905 ath5k_eeprom_convert_pcal_info_5112(struct ath5k_hw *ah, int mode,
906 				struct ath5k_chan_pcal_info *chinfo)
907 {
908 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
909 	struct ath5k_chan_pcal_info_rf5112 *pcinfo;
910 	u8 *pdgain_idx = ee->ee_pdc_to_idx[mode];
911 	unsigned int pier, pdg, point;
912 
913 	/* Fill raw data for each calibration pier */
914 	for (pier = 0; pier < ee->ee_n_piers[mode]; pier++) {
915 
916 		pcinfo = &chinfo[pier].rf5112_info;
917 
918 		/* Allocate pd_curves for this cal pier */
919 		chinfo[pier].pd_curves =
920 				kcalloc(AR5K_EEPROM_N_PD_CURVES,
921 					sizeof(struct ath5k_pdgain_info),
922 					GFP_KERNEL);
923 
924 		if (!chinfo[pier].pd_curves)
925 			goto err_out;
926 
927 		/* Fill pd_curves */
928 		for (pdg = 0; pdg < ee->ee_pd_gains[mode]; pdg++) {
929 
930 			u8 idx = pdgain_idx[pdg];
931 			struct ath5k_pdgain_info *pd =
932 					&chinfo[pier].pd_curves[idx];
933 
934 			/* Lowest gain curve (max power) */
935 			if (pdg == 0) {
936 				/* One more point for better accuracy */
937 				pd->pd_points = AR5K_EEPROM_N_XPD0_POINTS;
938 
939 				/* Allocate pd points for this curve */
940 				pd->pd_step = kcalloc(pd->pd_points,
941 						sizeof(u8), GFP_KERNEL);
942 
943 				if (!pd->pd_step)
944 					goto err_out;
945 
946 				pd->pd_pwr = kcalloc(pd->pd_points,
947 						sizeof(s16), GFP_KERNEL);
948 
949 				if (!pd->pd_pwr)
950 					goto err_out;
951 
952 				/* Fill raw dataset
953 				 * (all power levels are in 0.25dB units) */
954 				pd->pd_step[0] = pcinfo->pcdac_x0[0];
955 				pd->pd_pwr[0] = pcinfo->pwr_x0[0];
956 
957 				for (point = 1; point < pd->pd_points;
958 				point++) {
959 					/* Absolute values */
960 					pd->pd_pwr[point] =
961 						pcinfo->pwr_x0[point];
962 
963 					/* Deltas */
964 					pd->pd_step[point] =
965 						pd->pd_step[point - 1] +
966 						pcinfo->pcdac_x0[point];
967 				}
968 
969 				/* Set min power for this frequency */
970 				chinfo[pier].min_pwr = pd->pd_pwr[0];
971 
972 			/* Highest gain curve (min power) */
973 			} else if (pdg == 1) {
974 
975 				pd->pd_points = AR5K_EEPROM_N_XPD3_POINTS;
976 
977 				/* Allocate pd points for this curve */
978 				pd->pd_step = kcalloc(pd->pd_points,
979 						sizeof(u8), GFP_KERNEL);
980 
981 				if (!pd->pd_step)
982 					goto err_out;
983 
984 				pd->pd_pwr = kcalloc(pd->pd_points,
985 						sizeof(s16), GFP_KERNEL);
986 
987 				if (!pd->pd_pwr)
988 					goto err_out;
989 
990 				/* Fill raw dataset
991 				 * (all power levels are in 0.25dB units) */
992 				for (point = 0; point < pd->pd_points;
993 				point++) {
994 					/* Absolute values */
995 					pd->pd_pwr[point] =
996 						pcinfo->pwr_x3[point];
997 
998 					/* Fixed points */
999 					pd->pd_step[point] =
1000 						pcinfo->pcdac_x3[point];
1001 				}
1002 
1003 				/* Since we have a higher gain curve
1004 				 * override min power */
1005 				chinfo[pier].min_pwr = pd->pd_pwr[0];
1006 			}
1007 		}
1008 	}
1009 
1010 	return 0;
1011 
1012 err_out:
1013 	ath5k_eeprom_free_pcal_info(ah, mode);
1014 	return -ENOMEM;
1015 }
1016 
1017 /* Parse EEPROM data */
1018 static int
ath5k_eeprom_read_pcal_info_5112(struct ath5k_hw * ah,int mode)1019 ath5k_eeprom_read_pcal_info_5112(struct ath5k_hw *ah, int mode)
1020 {
1021 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1022 	struct ath5k_chan_pcal_info_rf5112 *chan_pcal_info;
1023 	struct ath5k_chan_pcal_info *gen_chan_info;
1024 	u8 *pdgain_idx = ee->ee_pdc_to_idx[mode];
1025 	u32 offset;
1026 	u8 i, c;
1027 	u16 val;
1028 	u8 pd_gains = 0;
1029 
1030 	/* Count how many curves we have and
1031 	 * identify them (which one of the 4
1032 	 * available curves we have on each count).
1033 	 * Curves are stored from lower (x0) to
1034 	 * higher (x3) gain */
1035 	for (i = 0; i < AR5K_EEPROM_N_PD_CURVES; i++) {
1036 		/* ee_x_gain[mode] is x gain mask */
1037 		if ((ee->ee_x_gain[mode] >> i) & 0x1)
1038 			pdgain_idx[pd_gains++] = i;
1039 	}
1040 	ee->ee_pd_gains[mode] = pd_gains;
1041 
1042 	if (pd_gains == 0 || pd_gains > 2)
1043 		return -EINVAL;
1044 
1045 	switch (mode) {
1046 	case AR5K_EEPROM_MODE_11A:
1047 		/*
1048 		 * Read 5GHz EEPROM channels
1049 		 */
1050 		offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
1051 		ath5k_eeprom_init_11a_pcal_freq(ah, offset);
1052 
1053 		offset += AR5K_EEPROM_GROUP2_OFFSET;
1054 		gen_chan_info = ee->ee_pwr_cal_a;
1055 		break;
1056 	case AR5K_EEPROM_MODE_11B:
1057 		offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
1058 		if (AR5K_EEPROM_HDR_11A(ee->ee_header))
1059 			offset += AR5K_EEPROM_GROUP3_OFFSET;
1060 
1061 		/* NB: frequency piers parsed during mode init */
1062 		gen_chan_info = ee->ee_pwr_cal_b;
1063 		break;
1064 	case AR5K_EEPROM_MODE_11G:
1065 		offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
1066 		if (AR5K_EEPROM_HDR_11A(ee->ee_header))
1067 			offset += AR5K_EEPROM_GROUP4_OFFSET;
1068 		else if (AR5K_EEPROM_HDR_11B(ee->ee_header))
1069 			offset += AR5K_EEPROM_GROUP2_OFFSET;
1070 
1071 		/* NB: frequency piers parsed during mode init */
1072 		gen_chan_info = ee->ee_pwr_cal_g;
1073 		break;
1074 	default:
1075 		return -EINVAL;
1076 	}
1077 
1078 	for (i = 0; i < ee->ee_n_piers[mode]; i++) {
1079 		chan_pcal_info = &gen_chan_info[i].rf5112_info;
1080 
1081 		/* Power values in quarter dB
1082 		 * for the lower xpd gain curve
1083 		 * (0 dBm -> higher output power) */
1084 		for (c = 0; c < AR5K_EEPROM_N_XPD0_POINTS; c++) {
1085 			AR5K_EEPROM_READ(offset++, val);
1086 			chan_pcal_info->pwr_x0[c] = (s8) (val & 0xff);
1087 			chan_pcal_info->pwr_x0[++c] = (s8) ((val >> 8) & 0xff);
1088 		}
1089 
1090 		/* PCDAC steps
1091 		 * corresponding to the above power
1092 		 * measurements */
1093 		AR5K_EEPROM_READ(offset++, val);
1094 		chan_pcal_info->pcdac_x0[1] = (val & 0x1f);
1095 		chan_pcal_info->pcdac_x0[2] = ((val >> 5) & 0x1f);
1096 		chan_pcal_info->pcdac_x0[3] = ((val >> 10) & 0x1f);
1097 
1098 		/* Power values in quarter dB
1099 		 * for the higher xpd gain curve
1100 		 * (18 dBm -> lower output power) */
1101 		AR5K_EEPROM_READ(offset++, val);
1102 		chan_pcal_info->pwr_x3[0] = (s8) (val & 0xff);
1103 		chan_pcal_info->pwr_x3[1] = (s8) ((val >> 8) & 0xff);
1104 
1105 		AR5K_EEPROM_READ(offset++, val);
1106 		chan_pcal_info->pwr_x3[2] = (val & 0xff);
1107 
1108 		/* PCDAC steps
1109 		 * corresponding to the above power
1110 		 * measurements (fixed) */
1111 		chan_pcal_info->pcdac_x3[0] = 20;
1112 		chan_pcal_info->pcdac_x3[1] = 35;
1113 		chan_pcal_info->pcdac_x3[2] = 63;
1114 
1115 		if (ee->ee_version >= AR5K_EEPROM_VERSION_4_3) {
1116 			chan_pcal_info->pcdac_x0[0] = ((val >> 8) & 0x3f);
1117 
1118 			/* Last xpd0 power level is also channel maximum */
1119 			gen_chan_info[i].max_pwr = chan_pcal_info->pwr_x0[3];
1120 		} else {
1121 			chan_pcal_info->pcdac_x0[0] = 1;
1122 			gen_chan_info[i].max_pwr = (s8) ((val >> 8) & 0xff);
1123 		}
1124 
1125 	}
1126 
1127 	return ath5k_eeprom_convert_pcal_info_5112(ah, mode, gen_chan_info);
1128 }
1129 
1130 
1131 /*
1132  * Read power calibration for RF2413 chips
1133  *
1134  * For RF2413 we have a Power to PDDAC table (Power Detector)
1135  * instead of a PCDAC and 4 pd gain curves for each calibrated channel.
1136  * Each curve has power on x axis in 0.5 db steps and PDDADC steps on y
1137  * axis and looks like an exponential function like the RF5111 curve.
1138  *
1139  * To recreate the curves we read here the points and interpolate
1140  * later. Note that in most cases only 2 (higher and lower) curves are
1141  * used (like RF5112) but vendors have the opportunity to include all
1142  * 4 curves on eeprom. The final curve (higher power) has an extra
1143  * point for better accuracy like RF5112.
1144  */
1145 
1146 /* For RF2413 power calibration data doesn't start on a fixed location and
1147  * if a mode is not supported, its section is missing -not zeroed-.
1148  * So we need to calculate the starting offset for each section by using
1149  * these two functions */
1150 
1151 /* Return the size of each section based on the mode and the number of pd
1152  * gains available (maximum 4). */
1153 static inline unsigned int
ath5k_pdgains_size_2413(struct ath5k_eeprom_info * ee,unsigned int mode)1154 ath5k_pdgains_size_2413(struct ath5k_eeprom_info *ee, unsigned int mode)
1155 {
1156 	static const unsigned int pdgains_size[] = { 4, 6, 9, 12 };
1157 	unsigned int sz;
1158 
1159 	sz = pdgains_size[ee->ee_pd_gains[mode] - 1];
1160 	sz *= ee->ee_n_piers[mode];
1161 
1162 	return sz;
1163 }
1164 
1165 /* Return the starting offset for a section based on the modes supported
1166  * and each section's size. */
1167 static unsigned int
ath5k_cal_data_offset_2413(struct ath5k_eeprom_info * ee,int mode)1168 ath5k_cal_data_offset_2413(struct ath5k_eeprom_info *ee, int mode)
1169 {
1170 	u32 offset = AR5K_EEPROM_CAL_DATA_START(ee->ee_misc4);
1171 
1172 	switch (mode) {
1173 	case AR5K_EEPROM_MODE_11G:
1174 		if (AR5K_EEPROM_HDR_11B(ee->ee_header))
1175 			offset += ath5k_pdgains_size_2413(ee,
1176 					AR5K_EEPROM_MODE_11B) +
1177 					AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
1178 		fallthrough;
1179 	case AR5K_EEPROM_MODE_11B:
1180 		if (AR5K_EEPROM_HDR_11A(ee->ee_header))
1181 			offset += ath5k_pdgains_size_2413(ee,
1182 					AR5K_EEPROM_MODE_11A) +
1183 					AR5K_EEPROM_N_5GHZ_CHAN / 2;
1184 		fallthrough;
1185 	case AR5K_EEPROM_MODE_11A:
1186 		break;
1187 	default:
1188 		break;
1189 	}
1190 
1191 	return offset;
1192 }
1193 
1194 /* Convert RF2413 specific data to generic raw data
1195  * used by interpolation code */
1196 static int
ath5k_eeprom_convert_pcal_info_2413(struct ath5k_hw * ah,int mode,struct ath5k_chan_pcal_info * chinfo)1197 ath5k_eeprom_convert_pcal_info_2413(struct ath5k_hw *ah, int mode,
1198 				struct ath5k_chan_pcal_info *chinfo)
1199 {
1200 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1201 	struct ath5k_chan_pcal_info_rf2413 *pcinfo;
1202 	u8 *pdgain_idx = ee->ee_pdc_to_idx[mode];
1203 	unsigned int pier, pdg, point;
1204 
1205 	/* Fill raw data for each calibration pier */
1206 	for (pier = 0; pier < ee->ee_n_piers[mode]; pier++) {
1207 
1208 		pcinfo = &chinfo[pier].rf2413_info;
1209 
1210 		/* Allocate pd_curves for this cal pier */
1211 		chinfo[pier].pd_curves =
1212 				kcalloc(AR5K_EEPROM_N_PD_CURVES,
1213 					sizeof(struct ath5k_pdgain_info),
1214 					GFP_KERNEL);
1215 
1216 		if (!chinfo[pier].pd_curves)
1217 			goto err_out;
1218 
1219 		/* Fill pd_curves */
1220 		for (pdg = 0; pdg < ee->ee_pd_gains[mode]; pdg++) {
1221 
1222 			u8 idx = pdgain_idx[pdg];
1223 			struct ath5k_pdgain_info *pd =
1224 					&chinfo[pier].pd_curves[idx];
1225 
1226 			/* One more point for the highest power
1227 			 * curve (lowest gain) */
1228 			if (pdg == ee->ee_pd_gains[mode] - 1)
1229 				pd->pd_points = AR5K_EEPROM_N_PD_POINTS;
1230 			else
1231 				pd->pd_points = AR5K_EEPROM_N_PD_POINTS - 1;
1232 
1233 			/* Allocate pd points for this curve */
1234 			pd->pd_step = kcalloc(pd->pd_points,
1235 					sizeof(u8), GFP_KERNEL);
1236 
1237 			if (!pd->pd_step)
1238 				goto err_out;
1239 
1240 			pd->pd_pwr = kcalloc(pd->pd_points,
1241 					sizeof(s16), GFP_KERNEL);
1242 
1243 			if (!pd->pd_pwr)
1244 				goto err_out;
1245 
1246 			/* Fill raw dataset
1247 			 * convert all pwr levels to
1248 			 * quarter dB for RF5112 compatibility */
1249 			pd->pd_step[0] = pcinfo->pddac_i[pdg];
1250 			pd->pd_pwr[0] = 4 * pcinfo->pwr_i[pdg];
1251 
1252 			for (point = 1; point < pd->pd_points; point++) {
1253 
1254 				pd->pd_pwr[point] = pd->pd_pwr[point - 1] +
1255 					2 * pcinfo->pwr[pdg][point - 1];
1256 
1257 				pd->pd_step[point] = pd->pd_step[point - 1] +
1258 						pcinfo->pddac[pdg][point - 1];
1259 
1260 			}
1261 
1262 			/* Highest gain curve -> min power */
1263 			if (pdg == 0)
1264 				chinfo[pier].min_pwr = pd->pd_pwr[0];
1265 
1266 			/* Lowest gain curve -> max power */
1267 			if (pdg == ee->ee_pd_gains[mode] - 1)
1268 				chinfo[pier].max_pwr =
1269 					pd->pd_pwr[pd->pd_points - 1];
1270 		}
1271 	}
1272 
1273 	return 0;
1274 
1275 err_out:
1276 	ath5k_eeprom_free_pcal_info(ah, mode);
1277 	return -ENOMEM;
1278 }
1279 
1280 /* Parse EEPROM data */
1281 static int
ath5k_eeprom_read_pcal_info_2413(struct ath5k_hw * ah,int mode)1282 ath5k_eeprom_read_pcal_info_2413(struct ath5k_hw *ah, int mode)
1283 {
1284 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1285 	struct ath5k_chan_pcal_info_rf2413 *pcinfo;
1286 	struct ath5k_chan_pcal_info *chinfo;
1287 	u8 *pdgain_idx = ee->ee_pdc_to_idx[mode];
1288 	u32 offset;
1289 	int idx, i;
1290 	u16 val;
1291 	u8 pd_gains = 0;
1292 
1293 	/* Count how many curves we have and
1294 	 * identify them (which one of the 4
1295 	 * available curves we have on each count).
1296 	 * Curves are stored from higher to
1297 	 * lower gain so we go backwards */
1298 	for (idx = AR5K_EEPROM_N_PD_CURVES - 1; idx >= 0; idx--) {
1299 		/* ee_x_gain[mode] is x gain mask */
1300 		if ((ee->ee_x_gain[mode] >> idx) & 0x1)
1301 			pdgain_idx[pd_gains++] = idx;
1302 
1303 	}
1304 	ee->ee_pd_gains[mode] = pd_gains;
1305 
1306 	if (pd_gains == 0)
1307 		return -EINVAL;
1308 
1309 	offset = ath5k_cal_data_offset_2413(ee, mode);
1310 	switch (mode) {
1311 	case AR5K_EEPROM_MODE_11A:
1312 		if (!AR5K_EEPROM_HDR_11A(ee->ee_header))
1313 			return 0;
1314 
1315 		ath5k_eeprom_init_11a_pcal_freq(ah, offset);
1316 		offset += AR5K_EEPROM_N_5GHZ_CHAN / 2;
1317 		chinfo = ee->ee_pwr_cal_a;
1318 		break;
1319 	case AR5K_EEPROM_MODE_11B:
1320 		if (!AR5K_EEPROM_HDR_11B(ee->ee_header))
1321 			return 0;
1322 
1323 		ath5k_eeprom_init_11bg_2413(ah, mode, offset);
1324 		offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
1325 		chinfo = ee->ee_pwr_cal_b;
1326 		break;
1327 	case AR5K_EEPROM_MODE_11G:
1328 		if (!AR5K_EEPROM_HDR_11G(ee->ee_header))
1329 			return 0;
1330 
1331 		ath5k_eeprom_init_11bg_2413(ah, mode, offset);
1332 		offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
1333 		chinfo = ee->ee_pwr_cal_g;
1334 		break;
1335 	default:
1336 		return -EINVAL;
1337 	}
1338 
1339 	for (i = 0; i < ee->ee_n_piers[mode]; i++) {
1340 		pcinfo = &chinfo[i].rf2413_info;
1341 
1342 		/*
1343 		 * Read pwr_i, pddac_i and the first
1344 		 * 2 pd points (pwr, pddac)
1345 		 */
1346 		AR5K_EEPROM_READ(offset++, val);
1347 		pcinfo->pwr_i[0] = val & 0x1f;
1348 		pcinfo->pddac_i[0] = (val >> 5) & 0x7f;
1349 		pcinfo->pwr[0][0] = (val >> 12) & 0xf;
1350 
1351 		AR5K_EEPROM_READ(offset++, val);
1352 		pcinfo->pddac[0][0] = val & 0x3f;
1353 		pcinfo->pwr[0][1] = (val >> 6) & 0xf;
1354 		pcinfo->pddac[0][1] = (val >> 10) & 0x3f;
1355 
1356 		AR5K_EEPROM_READ(offset++, val);
1357 		pcinfo->pwr[0][2] = val & 0xf;
1358 		pcinfo->pddac[0][2] = (val >> 4) & 0x3f;
1359 
1360 		pcinfo->pwr[0][3] = 0;
1361 		pcinfo->pddac[0][3] = 0;
1362 
1363 		if (pd_gains > 1) {
1364 			/*
1365 			 * Pd gain 0 is not the last pd gain
1366 			 * so it only has 2 pd points.
1367 			 * Continue with pd gain 1.
1368 			 */
1369 			pcinfo->pwr_i[1] = (val >> 10) & 0x1f;
1370 
1371 			pcinfo->pddac_i[1] = (val >> 15) & 0x1;
1372 			AR5K_EEPROM_READ(offset++, val);
1373 			pcinfo->pddac_i[1] |= (val & 0x3F) << 1;
1374 
1375 			pcinfo->pwr[1][0] = (val >> 6) & 0xf;
1376 			pcinfo->pddac[1][0] = (val >> 10) & 0x3f;
1377 
1378 			AR5K_EEPROM_READ(offset++, val);
1379 			pcinfo->pwr[1][1] = val & 0xf;
1380 			pcinfo->pddac[1][1] = (val >> 4) & 0x3f;
1381 			pcinfo->pwr[1][2] = (val >> 10) & 0xf;
1382 
1383 			pcinfo->pddac[1][2] = (val >> 14) & 0x3;
1384 			AR5K_EEPROM_READ(offset++, val);
1385 			pcinfo->pddac[1][2] |= (val & 0xF) << 2;
1386 
1387 			pcinfo->pwr[1][3] = 0;
1388 			pcinfo->pddac[1][3] = 0;
1389 		} else if (pd_gains == 1) {
1390 			/*
1391 			 * Pd gain 0 is the last one so
1392 			 * read the extra point.
1393 			 */
1394 			pcinfo->pwr[0][3] = (val >> 10) & 0xf;
1395 
1396 			pcinfo->pddac[0][3] = (val >> 14) & 0x3;
1397 			AR5K_EEPROM_READ(offset++, val);
1398 			pcinfo->pddac[0][3] |= (val & 0xF) << 2;
1399 		}
1400 
1401 		/*
1402 		 * Proceed with the other pd_gains
1403 		 * as above.
1404 		 */
1405 		if (pd_gains > 2) {
1406 			pcinfo->pwr_i[2] = (val >> 4) & 0x1f;
1407 			pcinfo->pddac_i[2] = (val >> 9) & 0x7f;
1408 
1409 			AR5K_EEPROM_READ(offset++, val);
1410 			pcinfo->pwr[2][0] = (val >> 0) & 0xf;
1411 			pcinfo->pddac[2][0] = (val >> 4) & 0x3f;
1412 			pcinfo->pwr[2][1] = (val >> 10) & 0xf;
1413 
1414 			pcinfo->pddac[2][1] = (val >> 14) & 0x3;
1415 			AR5K_EEPROM_READ(offset++, val);
1416 			pcinfo->pddac[2][1] |= (val & 0xF) << 2;
1417 
1418 			pcinfo->pwr[2][2] = (val >> 4) & 0xf;
1419 			pcinfo->pddac[2][2] = (val >> 8) & 0x3f;
1420 
1421 			pcinfo->pwr[2][3] = 0;
1422 			pcinfo->pddac[2][3] = 0;
1423 		} else if (pd_gains == 2) {
1424 			pcinfo->pwr[1][3] = (val >> 4) & 0xf;
1425 			pcinfo->pddac[1][3] = (val >> 8) & 0x3f;
1426 		}
1427 
1428 		if (pd_gains > 3) {
1429 			pcinfo->pwr_i[3] = (val >> 14) & 0x3;
1430 			AR5K_EEPROM_READ(offset++, val);
1431 			pcinfo->pwr_i[3] |= ((val >> 0) & 0x7) << 2;
1432 
1433 			pcinfo->pddac_i[3] = (val >> 3) & 0x7f;
1434 			pcinfo->pwr[3][0] = (val >> 10) & 0xf;
1435 			pcinfo->pddac[3][0] = (val >> 14) & 0x3;
1436 
1437 			AR5K_EEPROM_READ(offset++, val);
1438 			pcinfo->pddac[3][0] |= (val & 0xF) << 2;
1439 			pcinfo->pwr[3][1] = (val >> 4) & 0xf;
1440 			pcinfo->pddac[3][1] = (val >> 8) & 0x3f;
1441 
1442 			pcinfo->pwr[3][2] = (val >> 14) & 0x3;
1443 			AR5K_EEPROM_READ(offset++, val);
1444 			pcinfo->pwr[3][2] |= ((val >> 0) & 0x3) << 2;
1445 
1446 			pcinfo->pddac[3][2] = (val >> 2) & 0x3f;
1447 			pcinfo->pwr[3][3] = (val >> 8) & 0xf;
1448 
1449 			pcinfo->pddac[3][3] = (val >> 12) & 0xF;
1450 			AR5K_EEPROM_READ(offset++, val);
1451 			pcinfo->pddac[3][3] |= ((val >> 0) & 0x3) << 4;
1452 		} else if (pd_gains == 3) {
1453 			pcinfo->pwr[2][3] = (val >> 14) & 0x3;
1454 			AR5K_EEPROM_READ(offset++, val);
1455 			pcinfo->pwr[2][3] |= ((val >> 0) & 0x3) << 2;
1456 
1457 			pcinfo->pddac[2][3] = (val >> 2) & 0x3f;
1458 		}
1459 	}
1460 
1461 	return ath5k_eeprom_convert_pcal_info_2413(ah, mode, chinfo);
1462 }
1463 
1464 
1465 /*
1466  * Read per rate target power (this is the maximum tx power
1467  * supported by the card). This info is used when setting
1468  * tx power, no matter the channel.
1469  *
1470  * This also works for v5 EEPROMs.
1471  */
1472 static int
ath5k_eeprom_read_target_rate_pwr_info(struct ath5k_hw * ah,unsigned int mode)1473 ath5k_eeprom_read_target_rate_pwr_info(struct ath5k_hw *ah, unsigned int mode)
1474 {
1475 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1476 	struct ath5k_rate_pcal_info *rate_pcal_info;
1477 	u8 *rate_target_pwr_num;
1478 	u32 offset;
1479 	u16 val;
1480 	int i;
1481 
1482 	offset = AR5K_EEPROM_TARGET_PWRSTART(ee->ee_misc1);
1483 	rate_target_pwr_num = &ee->ee_rate_target_pwr_num[mode];
1484 	switch (mode) {
1485 	case AR5K_EEPROM_MODE_11A:
1486 		offset += AR5K_EEPROM_TARGET_PWR_OFF_11A(ee->ee_version);
1487 		rate_pcal_info = ee->ee_rate_tpwr_a;
1488 		ee->ee_rate_target_pwr_num[mode] = AR5K_EEPROM_N_5GHZ_RATE_CHAN;
1489 		break;
1490 	case AR5K_EEPROM_MODE_11B:
1491 		offset += AR5K_EEPROM_TARGET_PWR_OFF_11B(ee->ee_version);
1492 		rate_pcal_info = ee->ee_rate_tpwr_b;
1493 		ee->ee_rate_target_pwr_num[mode] = 2; /* 3rd is g mode's 1st */
1494 		break;
1495 	case AR5K_EEPROM_MODE_11G:
1496 		offset += AR5K_EEPROM_TARGET_PWR_OFF_11G(ee->ee_version);
1497 		rate_pcal_info = ee->ee_rate_tpwr_g;
1498 		ee->ee_rate_target_pwr_num[mode] = AR5K_EEPROM_N_2GHZ_CHAN;
1499 		break;
1500 	default:
1501 		return -EINVAL;
1502 	}
1503 
1504 	/* Different freq mask for older eeproms (<= v3.2) */
1505 	if (ee->ee_version <= AR5K_EEPROM_VERSION_3_2) {
1506 		for (i = 0; i < (*rate_target_pwr_num); i++) {
1507 			AR5K_EEPROM_READ(offset++, val);
1508 			rate_pcal_info[i].freq =
1509 			    ath5k_eeprom_bin2freq(ee, (val >> 9) & 0x7f, mode);
1510 
1511 			rate_pcal_info[i].target_power_6to24 = ((val >> 3) & 0x3f);
1512 			rate_pcal_info[i].target_power_36 = (val << 3) & 0x3f;
1513 
1514 			AR5K_EEPROM_READ(offset++, val);
1515 
1516 			if (rate_pcal_info[i].freq == AR5K_EEPROM_CHANNEL_DIS ||
1517 			    val == 0) {
1518 				(*rate_target_pwr_num) = i;
1519 				break;
1520 			}
1521 
1522 			rate_pcal_info[i].target_power_36 |= ((val >> 13) & 0x7);
1523 			rate_pcal_info[i].target_power_48 = ((val >> 7) & 0x3f);
1524 			rate_pcal_info[i].target_power_54 = ((val >> 1) & 0x3f);
1525 		}
1526 	} else {
1527 		for (i = 0; i < (*rate_target_pwr_num); i++) {
1528 			AR5K_EEPROM_READ(offset++, val);
1529 			rate_pcal_info[i].freq =
1530 			    ath5k_eeprom_bin2freq(ee, (val >> 8) & 0xff, mode);
1531 
1532 			rate_pcal_info[i].target_power_6to24 = ((val >> 2) & 0x3f);
1533 			rate_pcal_info[i].target_power_36 = (val << 4) & 0x3f;
1534 
1535 			AR5K_EEPROM_READ(offset++, val);
1536 
1537 			if (rate_pcal_info[i].freq == AR5K_EEPROM_CHANNEL_DIS ||
1538 			    val == 0) {
1539 				(*rate_target_pwr_num) = i;
1540 				break;
1541 			}
1542 
1543 			rate_pcal_info[i].target_power_36 |= (val >> 12) & 0xf;
1544 			rate_pcal_info[i].target_power_48 = ((val >> 6) & 0x3f);
1545 			rate_pcal_info[i].target_power_54 = (val & 0x3f);
1546 		}
1547 	}
1548 
1549 	return 0;
1550 }
1551 
1552 
1553 /*
1554  * Read per channel calibration info from EEPROM
1555  *
1556  * This info is used to calibrate the baseband power table. Imagine
1557  * that for each channel there is a power curve that's hw specific
1558  * (depends on amplifier etc) and we try to "correct" this curve using
1559  * offsets we pass on to phy chip (baseband -> before amplifier) so that
1560  * it can use accurate power values when setting tx power (takes amplifier's
1561  * performance on each channel into account).
1562  *
1563  * EEPROM provides us with the offsets for some pre-calibrated channels
1564  * and we have to interpolate to create the full table for these channels and
1565  * also the table for any channel.
1566  */
1567 static int
ath5k_eeprom_read_pcal_info(struct ath5k_hw * ah)1568 ath5k_eeprom_read_pcal_info(struct ath5k_hw *ah)
1569 {
1570 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1571 	int (*read_pcal)(struct ath5k_hw *hw, int mode);
1572 	int mode;
1573 	int err;
1574 
1575 	if ((ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0) &&
1576 			(AR5K_EEPROM_EEMAP(ee->ee_misc0) == 1))
1577 		read_pcal = ath5k_eeprom_read_pcal_info_5112;
1578 	else if ((ah->ah_ee_version >= AR5K_EEPROM_VERSION_5_0) &&
1579 			(AR5K_EEPROM_EEMAP(ee->ee_misc0) == 2))
1580 		read_pcal = ath5k_eeprom_read_pcal_info_2413;
1581 	else
1582 		read_pcal = ath5k_eeprom_read_pcal_info_5111;
1583 
1584 
1585 	for (mode = AR5K_EEPROM_MODE_11A; mode <= AR5K_EEPROM_MODE_11G;
1586 	mode++) {
1587 		err = read_pcal(ah, mode);
1588 		if (err)
1589 			return err;
1590 
1591 		err = ath5k_eeprom_read_target_rate_pwr_info(ah, mode);
1592 		if (err < 0)
1593 			return err;
1594 	}
1595 
1596 	return 0;
1597 }
1598 
1599 /* Read conformance test limits used for regulatory control */
1600 static int
ath5k_eeprom_read_ctl_info(struct ath5k_hw * ah)1601 ath5k_eeprom_read_ctl_info(struct ath5k_hw *ah)
1602 {
1603 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1604 	struct ath5k_edge_power *rep;
1605 	unsigned int fmask, pmask;
1606 	unsigned int ctl_mode;
1607 	int i, j;
1608 	u32 offset;
1609 	u16 val;
1610 
1611 	pmask = AR5K_EEPROM_POWER_M;
1612 	fmask = AR5K_EEPROM_FREQ_M(ee->ee_version);
1613 	offset = AR5K_EEPROM_CTL(ee->ee_version);
1614 	ee->ee_ctls = AR5K_EEPROM_N_CTLS(ee->ee_version);
1615 	for (i = 0; i < ee->ee_ctls; i += 2) {
1616 		AR5K_EEPROM_READ(offset++, val);
1617 		ee->ee_ctl[i] = (val >> 8) & 0xff;
1618 		ee->ee_ctl[i + 1] = val & 0xff;
1619 	}
1620 
1621 	offset = AR5K_EEPROM_GROUP8_OFFSET;
1622 	if (ee->ee_version >= AR5K_EEPROM_VERSION_4_0)
1623 		offset += AR5K_EEPROM_TARGET_PWRSTART(ee->ee_misc1) -
1624 			AR5K_EEPROM_GROUP5_OFFSET;
1625 	else
1626 		offset += AR5K_EEPROM_GROUPS_START(ee->ee_version);
1627 
1628 	rep = ee->ee_ctl_pwr;
1629 	for (i = 0; i < ee->ee_ctls; i++) {
1630 		switch (ee->ee_ctl[i] & AR5K_CTL_MODE_M) {
1631 		case AR5K_CTL_11A:
1632 		case AR5K_CTL_TURBO:
1633 			ctl_mode = AR5K_EEPROM_MODE_11A;
1634 			break;
1635 		default:
1636 			ctl_mode = AR5K_EEPROM_MODE_11G;
1637 			break;
1638 		}
1639 		if (ee->ee_ctl[i] == 0) {
1640 			if (ee->ee_version >= AR5K_EEPROM_VERSION_3_3)
1641 				offset += 8;
1642 			else
1643 				offset += 7;
1644 			rep += AR5K_EEPROM_N_EDGES;
1645 			continue;
1646 		}
1647 		if (ee->ee_version >= AR5K_EEPROM_VERSION_3_3) {
1648 			for (j = 0; j < AR5K_EEPROM_N_EDGES; j += 2) {
1649 				AR5K_EEPROM_READ(offset++, val);
1650 				rep[j].freq = (val >> 8) & fmask;
1651 				rep[j + 1].freq = val & fmask;
1652 			}
1653 			for (j = 0; j < AR5K_EEPROM_N_EDGES; j += 2) {
1654 				AR5K_EEPROM_READ(offset++, val);
1655 				rep[j].edge = (val >> 8) & pmask;
1656 				rep[j].flag = (val >> 14) & 1;
1657 				rep[j + 1].edge = val & pmask;
1658 				rep[j + 1].flag = (val >> 6) & 1;
1659 			}
1660 		} else {
1661 			AR5K_EEPROM_READ(offset++, val);
1662 			rep[0].freq = (val >> 9) & fmask;
1663 			rep[1].freq = (val >> 2) & fmask;
1664 			rep[2].freq = (val << 5) & fmask;
1665 
1666 			AR5K_EEPROM_READ(offset++, val);
1667 			rep[2].freq |= (val >> 11) & 0x1f;
1668 			rep[3].freq = (val >> 4) & fmask;
1669 			rep[4].freq = (val << 3) & fmask;
1670 
1671 			AR5K_EEPROM_READ(offset++, val);
1672 			rep[4].freq |= (val >> 13) & 0x7;
1673 			rep[5].freq = (val >> 6) & fmask;
1674 			rep[6].freq = (val << 1) & fmask;
1675 
1676 			AR5K_EEPROM_READ(offset++, val);
1677 			rep[6].freq |= (val >> 15) & 0x1;
1678 			rep[7].freq = (val >> 8) & fmask;
1679 
1680 			rep[0].edge = (val >> 2) & pmask;
1681 			rep[1].edge = (val << 4) & pmask;
1682 
1683 			AR5K_EEPROM_READ(offset++, val);
1684 			rep[1].edge |= (val >> 12) & 0xf;
1685 			rep[2].edge = (val >> 6) & pmask;
1686 			rep[3].edge = val & pmask;
1687 
1688 			AR5K_EEPROM_READ(offset++, val);
1689 			rep[4].edge = (val >> 10) & pmask;
1690 			rep[5].edge = (val >> 4) & pmask;
1691 			rep[6].edge = (val << 2) & pmask;
1692 
1693 			AR5K_EEPROM_READ(offset++, val);
1694 			rep[6].edge |= (val >> 14) & 0x3;
1695 			rep[7].edge = (val >> 8) & pmask;
1696 		}
1697 		for (j = 0; j < AR5K_EEPROM_N_EDGES; j++) {
1698 			rep[j].freq = ath5k_eeprom_bin2freq(ee,
1699 				rep[j].freq, ctl_mode);
1700 		}
1701 		rep += AR5K_EEPROM_N_EDGES;
1702 	}
1703 
1704 	return 0;
1705 }
1706 
1707 static int
ath5k_eeprom_read_spur_chans(struct ath5k_hw * ah)1708 ath5k_eeprom_read_spur_chans(struct ath5k_hw *ah)
1709 {
1710 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1711 	u32 offset;
1712 	u16 val;
1713 	int  i;
1714 
1715 	offset = AR5K_EEPROM_CTL(ee->ee_version) +
1716 				AR5K_EEPROM_N_CTLS(ee->ee_version);
1717 
1718 	if (ee->ee_version < AR5K_EEPROM_VERSION_5_3) {
1719 		/* No spur info for 5GHz */
1720 		ee->ee_spur_chans[0][0] = AR5K_EEPROM_NO_SPUR;
1721 		/* 2 channels for 2GHz (2464/2420) */
1722 		ee->ee_spur_chans[0][1] = AR5K_EEPROM_5413_SPUR_CHAN_1;
1723 		ee->ee_spur_chans[1][1] = AR5K_EEPROM_5413_SPUR_CHAN_2;
1724 		ee->ee_spur_chans[2][1] = AR5K_EEPROM_NO_SPUR;
1725 	} else if (ee->ee_version >= AR5K_EEPROM_VERSION_5_3) {
1726 		for (i = 0; i < AR5K_EEPROM_N_SPUR_CHANS; i++) {
1727 			AR5K_EEPROM_READ(offset, val);
1728 			ee->ee_spur_chans[i][0] = val;
1729 			AR5K_EEPROM_READ(offset + AR5K_EEPROM_N_SPUR_CHANS,
1730 									val);
1731 			ee->ee_spur_chans[i][1] = val;
1732 			offset++;
1733 		}
1734 	}
1735 
1736 	return 0;
1737 }
1738 
1739 
1740 /***********************\
1741 * Init/Detach functions *
1742 \***********************/
1743 
1744 /*
1745  * Initialize eeprom data structure
1746  */
1747 int
ath5k_eeprom_init(struct ath5k_hw * ah)1748 ath5k_eeprom_init(struct ath5k_hw *ah)
1749 {
1750 	int err;
1751 
1752 	err = ath5k_eeprom_init_header(ah);
1753 	if (err < 0)
1754 		return err;
1755 
1756 	err = ath5k_eeprom_init_modes(ah);
1757 	if (err < 0)
1758 		return err;
1759 
1760 	err = ath5k_eeprom_read_pcal_info(ah);
1761 	if (err < 0)
1762 		return err;
1763 
1764 	err = ath5k_eeprom_read_ctl_info(ah);
1765 	if (err < 0)
1766 		return err;
1767 
1768 	err = ath5k_eeprom_read_spur_chans(ah);
1769 	if (err < 0)
1770 		return err;
1771 
1772 	return 0;
1773 }
1774 
1775 void
ath5k_eeprom_detach(struct ath5k_hw * ah)1776 ath5k_eeprom_detach(struct ath5k_hw *ah)
1777 {
1778 	u8 mode;
1779 
1780 	for (mode = AR5K_EEPROM_MODE_11A; mode <= AR5K_EEPROM_MODE_11G; mode++)
1781 		ath5k_eeprom_free_pcal_info(ah, mode);
1782 }
1783 
1784 int
ath5k_eeprom_mode_from_channel(struct ath5k_hw * ah,struct ieee80211_channel * channel)1785 ath5k_eeprom_mode_from_channel(struct ath5k_hw *ah,
1786 		struct ieee80211_channel *channel)
1787 {
1788 	switch (channel->hw_value) {
1789 	case AR5K_MODE_11A:
1790 		return AR5K_EEPROM_MODE_11A;
1791 	case AR5K_MODE_11G:
1792 		return AR5K_EEPROM_MODE_11G;
1793 	case AR5K_MODE_11B:
1794 		return AR5K_EEPROM_MODE_11B;
1795 	default:
1796 		ATH5K_WARN(ah, "channel is not A/B/G!");
1797 		return AR5K_EEPROM_MODE_11A;
1798 	}
1799 }
1800