1 /* 2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3 * Copyright (c) 2002-2008 Atheros Communications, Inc. 4 * 5 * Permission to use, copy, modify, and/or 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 * $FreeBSD$ 18 */ 19 #include "opt_ah.h" 20 21 #include "ah.h" 22 #include "ah_internal.h" 23 24 #include "ar5416/ar5416.h" 25 #include "ar5416/ar5416reg.h" 26 27 /* 28 * Checks to see if an interrupt is pending on our NIC 29 * 30 * Returns: TRUE if an interrupt is pending 31 * FALSE if not 32 */ 33 HAL_BOOL 34 ar5416IsInterruptPending(struct ath_hal *ah) 35 { 36 uint32_t isr; 37 /* 38 * Some platforms trigger our ISR before applying power to 39 * the card, so make sure the INTPEND is really 1, not 0xffffffff. 40 */ 41 isr = OS_REG_READ(ah, AR_INTR_ASYNC_CAUSE); 42 if (isr != AR_INTR_SPURIOUS && (isr & AR_INTR_MAC_IRQ) != 0) 43 return AH_TRUE; 44 45 isr = OS_REG_READ(ah, AR_INTR_SYNC_CAUSE); 46 if (isr != AR_INTR_SPURIOUS && (isr & AR_INTR_SYNC_DEFAULT)) 47 return AH_TRUE; 48 49 return AH_FALSE; 50 } 51 52 /* 53 * Reads the Interrupt Status Register value from the NIC, thus deasserting 54 * the interrupt line, and returns both the masked and unmasked mapped ISR 55 * values. The value returned is mapped to abstract the hw-specific bit 56 * locations in the Interrupt Status Register. 57 * 58 * Returns: A hardware-abstracted bitmap of all non-masked-out 59 * interrupts pending, as well as an unmasked value 60 */ 61 HAL_BOOL 62 ar5416GetPendingInterrupts(struct ath_hal *ah, HAL_INT *masked) 63 { 64 uint32_t isr, isr0, isr1, sync_cause; 65 66 /* 67 * Verify there's a mac interrupt and the RTC is on. 68 */ 69 if ((OS_REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) && 70 (OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M) == AR_RTC_STATUS_ON) 71 isr = OS_REG_READ(ah, AR_ISR); 72 else 73 isr = 0; 74 sync_cause = OS_REG_READ(ah, AR_INTR_SYNC_CAUSE); 75 sync_cause &= AR_INTR_SYNC_DEFAULT; 76 if (isr == 0 && sync_cause == 0) { 77 *masked = 0; 78 return AH_FALSE; 79 } 80 81 if (isr != 0) { 82 struct ath_hal_5212 *ahp = AH5212(ah); 83 uint32_t mask2; 84 85 mask2 = 0; 86 if (isr & AR_ISR_BCNMISC) { 87 uint32_t isr2 = OS_REG_READ(ah, AR_ISR_S2); 88 if (isr2 & AR_ISR_S2_TIM) 89 mask2 |= HAL_INT_TIM; 90 if (isr2 & AR_ISR_S2_DTIM) 91 mask2 |= HAL_INT_DTIM; 92 if (isr2 & AR_ISR_S2_DTIMSYNC) 93 mask2 |= HAL_INT_DTIMSYNC; 94 if (isr2 & (AR_ISR_S2_CABEND )) 95 mask2 |= HAL_INT_CABEND; 96 if (isr2 & AR_ISR_S2_GTT) 97 mask2 |= HAL_INT_GTT; 98 if (isr2 & AR_ISR_S2_CST) 99 mask2 |= HAL_INT_CST; 100 if (isr2 & AR_ISR_S2_TSFOOR) 101 mask2 |= HAL_INT_TSFOOR; 102 } 103 104 isr = OS_REG_READ(ah, AR_ISR_RAC); 105 if (isr == 0xffffffff) { 106 *masked = 0; 107 return AH_FALSE;; 108 } 109 110 *masked = isr & HAL_INT_COMMON; 111 if (isr & (AR_ISR_RXOK | AR_ISR_RXERR)) 112 *masked |= HAL_INT_RX; 113 if (isr & (AR_ISR_TXOK | AR_ISR_TXDESC | AR_ISR_TXERR | AR_ISR_TXEOL)) { 114 *masked |= HAL_INT_TX; 115 isr0 = OS_REG_READ(ah, AR_ISR_S0_S); 116 ahp->ah_intrTxqs |= MS(isr0, AR_ISR_S0_QCU_TXOK); 117 ahp->ah_intrTxqs |= MS(isr0, AR_ISR_S0_QCU_TXDESC); 118 isr1 = OS_REG_READ(ah, AR_ISR_S1_S); 119 ahp->ah_intrTxqs |= MS(isr1, AR_ISR_S1_QCU_TXERR); 120 ahp->ah_intrTxqs |= MS(isr1, AR_ISR_S1_QCU_TXEOL); 121 } 122 123 /* Interrupt Mitigation on AR5416 */ 124 #ifdef AR5416_INT_MITIGATION 125 if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM)) 126 *masked |= HAL_INT_RX; 127 if (isr & (AR_ISR_TXMINTR | AR_ISR_TXINTM)) 128 *masked |= HAL_INT_TX; 129 #endif 130 *masked |= mask2; 131 } 132 if (sync_cause != 0) { 133 if (sync_cause & (AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR)) { 134 *masked |= HAL_INT_FATAL; 135 } 136 if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) { 137 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: RADM CPL timeout\n", 138 __func__); 139 OS_REG_WRITE(ah, AR_RC, AR_RC_HOSTIF); 140 OS_REG_WRITE(ah, AR_RC, 0); 141 *masked |= HAL_INT_FATAL; 142 } 143 /* 144 * On fatal errors collect ISR state for debugging. 145 */ 146 if (*masked & HAL_INT_FATAL) { 147 AH_PRIVATE(ah)->ah_fatalState[0] = isr; 148 AH_PRIVATE(ah)->ah_fatalState[1] = sync_cause; 149 HALDEBUG(ah, HAL_DEBUG_ANY, 150 "%s: fatal error, ISR_RAC 0x%x SYNC_CAUSE 0x%x\n", 151 __func__, isr, sync_cause); 152 } 153 154 OS_REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause); 155 /* NB: flush write */ 156 (void) OS_REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR); 157 } 158 return AH_TRUE; 159 } 160 161 /* 162 * Atomically enables NIC interrupts. Interrupts are passed in 163 * via the enumerated bitmask in ints. 164 */ 165 HAL_INT 166 ar5416SetInterrupts(struct ath_hal *ah, HAL_INT ints) 167 { 168 struct ath_hal_5212 *ahp = AH5212(ah); 169 uint32_t omask = ahp->ah_maskReg; 170 uint32_t mask, mask2; 171 172 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: 0x%x => 0x%x\n", 173 __func__, omask, ints); 174 175 if (omask & HAL_INT_GLOBAL) { 176 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: disable IER\n", __func__); 177 OS_REG_WRITE(ah, AR_IER, AR_IER_DISABLE); 178 (void) OS_REG_READ(ah, AR_IER); 179 180 OS_REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, 0); 181 (void) OS_REG_READ(ah, AR_INTR_ASYNC_ENABLE); 182 183 OS_REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0); 184 (void) OS_REG_READ(ah, AR_INTR_SYNC_ENABLE); 185 } 186 187 mask = ints & HAL_INT_COMMON; 188 mask2 = 0; 189 190 if (ints & HAL_INT_TX) { 191 if (ahp->ah_txOkInterruptMask) 192 mask |= AR_IMR_TXOK; 193 if (ahp->ah_txErrInterruptMask) 194 mask |= AR_IMR_TXERR; 195 if (ahp->ah_txDescInterruptMask) 196 mask |= AR_IMR_TXDESC; 197 if (ahp->ah_txEolInterruptMask) 198 mask |= AR_IMR_TXEOL; 199 } 200 if (ints & HAL_INT_RX) 201 mask |= AR_IMR_RXOK | AR_IMR_RXERR | AR_IMR_RXDESC; 202 #ifdef AR5416_INT_MITIGATION 203 /* 204 * Overwrite default mask if Interrupt mitigation 205 * is specified for AR5416 206 */ 207 mask = ints & HAL_INT_COMMON; 208 if (ints & HAL_INT_TX) 209 mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM; 210 if (ints & HAL_INT_RX) 211 mask |= AR_IMR_RXERR | AR_IMR_RXMINTR | AR_IMR_RXINTM; 212 #endif 213 if (ints & (HAL_INT_BMISC)) { 214 mask |= AR_IMR_BCNMISC; 215 if (ints & HAL_INT_TIM) 216 mask2 |= AR_IMR_S2_TIM; 217 if (ints & HAL_INT_DTIM) 218 mask2 |= AR_IMR_S2_DTIM; 219 if (ints & HAL_INT_DTIMSYNC) 220 mask2 |= AR_IMR_S2_DTIMSYNC; 221 if (ints & HAL_INT_CABEND) 222 mask2 |= (AR_IMR_S2_CABEND ); 223 if (ints & HAL_INT_GTT) 224 mask2 |= AR_IMR_S2_GTT; 225 if (ints & HAL_INT_CST) 226 mask2 |= AR_IMR_S2_CST; 227 if (ints & HAL_INT_TSFOOR) 228 mask2 |= AR_IMR_S2_TSFOOR; 229 } 230 231 /* Write the new IMR and store off our SW copy. */ 232 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: new IMR 0x%x\n", __func__, mask); 233 OS_REG_WRITE(ah, AR_IMR, mask); 234 mask = OS_REG_READ(ah, AR_IMR_S2) & ~(AR_IMR_S2_TIM | 235 AR_IMR_S2_DTIM | 236 AR_IMR_S2_DTIMSYNC | 237 AR_IMR_S2_CABEND | 238 AR_IMR_S2_CABTO | 239 AR_IMR_S2_TSFOOR | 240 AR_IMR_S2_GTT | 241 AR_IMR_S2_CST); 242 OS_REG_WRITE(ah, AR_IMR_S2, mask | mask2); 243 244 ahp->ah_maskReg = ints; 245 246 /* Re-enable interrupts if they were enabled before. */ 247 if (ints & HAL_INT_GLOBAL) { 248 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: enable IER\n", __func__); 249 OS_REG_WRITE(ah, AR_IER, AR_IER_ENABLE); 250 251 mask = AR_INTR_MAC_IRQ; 252 if (ints & HAL_INT_GPIO) 253 mask |= SM(AH5416(ah)->ah_gpioMask, 254 AR_INTR_ASYNC_MASK_GPIO); 255 OS_REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, mask); 256 OS_REG_WRITE(ah, AR_INTR_ASYNC_MASK, mask); 257 258 mask = AR_INTR_SYNC_DEFAULT; 259 if (ints & HAL_INT_GPIO) 260 mask |= SM(AH5416(ah)->ah_gpioMask, 261 AR_INTR_SYNC_MASK_GPIO); 262 OS_REG_WRITE(ah, AR_INTR_SYNC_ENABLE, mask); 263 OS_REG_WRITE(ah, AR_INTR_SYNC_MASK, mask); 264 } 265 266 return omask; 267 } 268