Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ath/ath_hal/ah_eeprom_v1.c
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1 /*- 2 * SPDX-License-Identifier: ISC 3 * 4 * Copyright (c) 2008 Sam Leffler, Errno Consulting 5 * Copyright (c) 2008 Atheros Communications, Inc. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 * 19 * $FreeBSD$ 20 */ 21 #include "opt_ah.h" 22 23 #include "ah.h" 24 #include "ah_internal.h" 25 #include "ah_eeprom_v1.h" 26 27 static HAL_STATUS 28 v1EepromGet(struct ath_hal *ah, int param, void *val) 29 { 30 HAL_EEPROM_v1 *ee = AH_PRIVATE(ah)->ah_eeprom; 31 uint32_t sum; 32 uint16_t eeval; 33 uint8_t *macaddr; 34 int i; 35 36 switch (param) { 37 case AR_EEP_MACADDR: /* Get MAC Address */ 38 sum = 0; 39 macaddr = val; 40 for (i = 0; i < 3; i++) { 41 if (!ath_hal_eepromRead(ah, AR_EEPROM_MAC(i), &eeval)) { 42 HALDEBUG(ah, HAL_DEBUG_ANY, 43 "%s: cannot read EEPROM location %u\n", 44 __func__, i); 45 return HAL_EEREAD; 46 } 47 sum += eeval; 48 macaddr[2*i + 0] = eeval >> 8; 49 macaddr[2*i + 1] = eeval & 0xff; 50 } 51 if (sum == 0 || sum == 0xffff*3) { 52 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: bad mac address %s\n", 53 __func__, ath_hal_ether_sprintf(macaddr)); 54 return HAL_EEBADMAC; 55 } 56 return HAL_OK; 57 case AR_EEP_REGDMN_0: 58 *(uint16_t *) val = ee->ee_regDomain[0]; 59 return HAL_OK; 60 case AR_EEP_RFKILL: 61 HALASSERT(val == AH_NULL); 62 return ee->ee_rfKill ? HAL_OK : HAL_EIO; 63 case AR_EEP_WRITEPROTECT: 64 HALASSERT(val == AH_NULL); 65 return (ee->ee_protect & AR_EEPROM_PROTOTECT_WP_128_191) ? 66 HAL_OK : HAL_EIO; 67 default: 68 HALASSERT(0); 69 return HAL_EINVAL; 70 } 71 } 72 73 static HAL_STATUS 74 v1EepromSet(struct ath_hal *ah, int param, int v) 75 { 76 return HAL_EINVAL; 77 } 78 79 static HAL_BOOL 80 v1EepromDiag(struct ath_hal *ah, int request, 81 const void *args, uint32_t argsize, void **result, uint32_t *resultsize) 82 { 83 HAL_EEPROM_v1 *ee = AH_PRIVATE(ah)->ah_eeprom; 84 85 switch (request) { 86 case HAL_DIAG_EEPROM: 87 *result = ee; 88 *resultsize = sizeof(*ee); 89 return AH_TRUE; 90 } 91 return AH_FALSE; 92 } 93 94 static uint16_t 95 v1EepromGetSpurChan(struct ath_hal *ah, int ix, HAL_BOOL is2GHz) 96 { 97 return AR_NO_SPUR; 98 } 99 100 /* 101 * Reclaim any EEPROM-related storage. 102 */ 103 static void 104 v1EepromDetach(struct ath_hal *ah) 105 { 106 HAL_EEPROM_v1 *ee = AH_PRIVATE(ah)->ah_eeprom; 107 108 ath_hal_free(ee); 109 AH_PRIVATE(ah)->ah_eeprom = AH_NULL; 110 } 111 112 HAL_STATUS 113 ath_hal_v1EepromAttach(struct ath_hal *ah) 114 { 115 HAL_EEPROM_v1 *ee = AH_PRIVATE(ah)->ah_eeprom; 116 uint16_t athvals[AR_EEPROM_ATHEROS_MAX]; /* XXX off stack */ 117 uint16_t protect, eeprom_version, eeval; 118 uint32_t sum; 119 int i, loc; 120 121 HALASSERT(ee == AH_NULL); 122 123 if (!ath_hal_eepromRead(ah, AR_EEPROM_MAGIC, &eeval)) { 124 HALDEBUG(ah, HAL_DEBUG_ANY, 125 "%s: cannot read EEPROM magic number\n", __func__); 126 return HAL_EEREAD; 127 } 128 if (eeval != 0x5aa5) { 129 HALDEBUG(ah, HAL_DEBUG_ANY, 130 "%s: invalid EEPROM magic number 0x%x\n", __func__, eeval); 131 return HAL_EEMAGIC; 132 } 133 134 if (!ath_hal_eepromRead(ah, AR_EEPROM_PROTECT, &protect)) { 135 HALDEBUG(ah, HAL_DEBUG_ANY, 136 "%s: cannot read EEPROM protection bits; read locked?\n", 137 __func__); 138 return HAL_EEREAD; 139 } 140 HALDEBUG(ah, HAL_DEBUG_ATTACH, "EEPROM protect 0x%x\n", protect); 141 /* XXX check proper access before continuing */ 142 143 if (!ath_hal_eepromRead(ah, AR_EEPROM_VERSION, &eeprom_version)) { 144 HALDEBUG(ah, HAL_DEBUG_ANY, 145 "%s: unable to read EEPROM version\n", __func__); 146 return HAL_EEREAD; 147 } 148 if (((eeprom_version>>12) & 0xf) != 1) { 149 /* 150 * This code only groks the version 1 EEPROM layout. 151 */ 152 HALDEBUG(ah, HAL_DEBUG_ANY, 153 "%s: unsupported EEPROM version 0x%x found\n", 154 __func__, eeprom_version); 155 return HAL_EEVERSION; 156 } 157 158 /* 159 * Read the Atheros EEPROM entries and calculate the checksum. 160 */ 161 sum = 0; 162 for (i = 0; i < AR_EEPROM_ATHEROS_MAX; i++) { 163 if (!ath_hal_eepromRead(ah, AR_EEPROM_ATHEROS(i), &athvals[i])) 164 return HAL_EEREAD; 165 sum ^= athvals[i]; 166 } 167 if (sum != 0xffff) { 168 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: bad EEPROM checksum 0x%x\n", 169 __func__, sum); 170 return HAL_EEBADSUM; 171 } 172 173 /* 174 * Valid checksum, fetch the regulatory domain and save values. 175 */ 176 if (!ath_hal_eepromRead(ah, AR_EEPROM_REG_DOMAIN, &eeval)) { 177 HALDEBUG(ah, HAL_DEBUG_ANY, 178 "%s: cannot read regdomain from EEPROM\n", __func__); 179 return HAL_EEREAD; 180 } 181 182 ee = ath_hal_malloc(sizeof(HAL_EEPROM_v1)); 183 if (ee == AH_NULL) { 184 /* XXX message */ 185 return HAL_ENOMEM; 186 } 187 188 ee->ee_version = eeprom_version; 189 ee->ee_protect = protect; 190 ee->ee_antenna = athvals[2]; 191 ee->ee_biasCurrents = athvals[3]; 192 ee->ee_thresh62 = athvals[4] & 0xff; 193 ee->ee_xlnaOn = (athvals[4] >> 8) & 0xff; 194 ee->ee_xpaOn = athvals[5] & 0xff; 195 ee->ee_xpaOff = (athvals[5] >> 8) & 0xff; 196 ee->ee_regDomain[0] = (athvals[6] >> 8) & 0xff; 197 ee->ee_regDomain[1] = athvals[6] & 0xff; 198 ee->ee_regDomain[2] = (athvals[7] >> 8) & 0xff; 199 ee->ee_regDomain[3] = athvals[7] & 0xff; 200 ee->ee_rfKill = athvals[8] & 0x1; 201 ee->ee_devType = (athvals[8] >> 1) & 0x7; 202 203 for (i = 0, loc = AR_EEPROM_ATHEROS_TP_SETTINGS; i < AR_CHANNELS_MAX; i++, loc += AR_TP_SETTINGS_SIZE) { 204 struct tpcMap *chan = &ee->ee_tpc[i]; 205 206 /* Copy pcdac and gain_f values from EEPROM */ 207 chan->pcdac[0] = (athvals[loc] >> 10) & 0x3F; 208 chan->gainF[0] = (athvals[loc] >> 4) & 0x3F; 209 chan->pcdac[1] = ((athvals[loc] << 2) & 0x3C) 210 | ((athvals[loc+1] >> 14) & 0x03); 211 chan->gainF[1] = (athvals[loc+1] >> 8) & 0x3F; 212 chan->pcdac[2] = (athvals[loc+1] >> 2) & 0x3F; 213 chan->gainF[2] = ((athvals[loc+1] << 4) & 0x30) 214 | ((athvals[loc+2] >> 12) & 0x0F); 215 chan->pcdac[3] = (athvals[loc+2] >> 6) & 0x3F; 216 chan->gainF[3] = athvals[loc+2] & 0x3F; 217 chan->pcdac[4] = (athvals[loc+3] >> 10) & 0x3F; 218 chan->gainF[4] = (athvals[loc+3] >> 4) & 0x3F; 219 chan->pcdac[5] = ((athvals[loc+3] << 2) & 0x3C) 220 | ((athvals[loc+4] >> 14) & 0x03); 221 chan->gainF[5] = (athvals[loc+4] >> 8) & 0x3F; 222 chan->pcdac[6] = (athvals[loc+4] >> 2) & 0x3F; 223 chan->gainF[6] = ((athvals[loc+4] << 4) & 0x30) 224 | ((athvals[loc+5] >> 12) & 0x0F); 225 chan->pcdac[7] = (athvals[loc+5] >> 6) & 0x3F; 226 chan->gainF[7] = athvals[loc+5] & 0x3F; 227 chan->pcdac[8] = (athvals[loc+6] >> 10) & 0x3F; 228 chan->gainF[8] = (athvals[loc+6] >> 4) & 0x3F; 229 chan->pcdac[9] = ((athvals[loc+6] << 2) & 0x3C) 230 | ((athvals[loc+7] >> 14) & 0x03); 231 chan->gainF[9] = (athvals[loc+7] >> 8) & 0x3F; 232 chan->pcdac[10] = (athvals[loc+7] >> 2) & 0x3F; 233 chan->gainF[10] = ((athvals[loc+7] << 4) & 0x30) 234 | ((athvals[loc+8] >> 12) & 0x0F); 235 236 /* Copy Regulatory Domain and Rate Information from EEPROM */ 237 chan->rate36 = (athvals[loc+8] >> 6) & 0x3F; 238 chan->rate48 = athvals[loc+8] & 0x3F; 239 chan->rate54 = (athvals[loc+9] >> 10) & 0x3F; 240 chan->regdmn[0] = (athvals[loc+9] >> 4) & 0x3F; 241 chan->regdmn[1] = ((athvals[loc+9] << 2) & 0x3C) 242 | ((athvals[loc+10] >> 14) & 0x03); 243 chan->regdmn[2] = (athvals[loc+10] >> 8) & 0x3F; 244 chan->regdmn[3] = (athvals[loc+10] >> 2) & 0x3F; 245 } 246 247 AH_PRIVATE(ah)->ah_eeprom = ee; 248 AH_PRIVATE(ah)->ah_eeversion = eeprom_version; 249 AH_PRIVATE(ah)->ah_eepromDetach = v1EepromDetach; 250 AH_PRIVATE(ah)->ah_eepromGet = v1EepromGet; 251 AH_PRIVATE(ah)->ah_eepromSet = v1EepromSet; 252 AH_PRIVATE(ah)->ah_getSpurChan = v1EepromGetSpurChan; 253 AH_PRIVATE(ah)->ah_eepromDiag = v1EepromDiag; 254 return HAL_OK; 255 }
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