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madwifi/ath_hal/ar5416/ar5416_misc.c

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/*
* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
* Copyright (c) 2002-2008 Atheros Communications, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* $Id: ar5416_misc.c,v 1.12 2008/11/27 22:30:07 sam Exp $
*/
#include "opt_ah.h"
#include "ah.h"
#include "ah_internal.h"
#include "ah_devid.h"
#ifdef AH_DEBUG
#include "ah_desc.h" /* NB: for HAL_PHYERR* */
#endif
#include "ar5416/ar5416.h"
#include "ar5416/ar5416reg.h"
#include "ar5416/ar5416phy.h"
/*
* Return the wireless modes (a,b,g,t) supported by hardware.
*
* This value is what is actually supported by the hardware
* and is unaffected by regulatory/country code settings.
*
*/
u_int
ar5416GetWirelessModes(struct ath_hal *ah)
{
u_int mode;
mode = ar5212GetWirelessModes(ah);
if (mode & HAL_MODE_11A)
mode |= HAL_MODE_11NA_HT20
| HAL_MODE_11NA_HT40PLUS
| HAL_MODE_11NA_HT40MINUS
;
if (mode & HAL_MODE_11G)
mode |= HAL_MODE_11NG_HT20
| HAL_MODE_11NG_HT40PLUS
| HAL_MODE_11NG_HT40MINUS
;
return mode;
}
/*
* Change the LED blinking pattern to correspond to the connectivity
*/
void
ar5416SetLedState(struct ath_hal *ah, HAL_LED_STATE state)
{
static const uint32_t ledbits[8] = {
AR_MAC_LED_ASSOC_NONE, /* HAL_LED_INIT */
AR_MAC_LED_ASSOC_PEND, /* HAL_LED_SCAN */
AR_MAC_LED_ASSOC_PEND, /* HAL_LED_AUTH */
AR_MAC_LED_ASSOC_ACTIVE, /* HAL_LED_ASSOC*/
AR_MAC_LED_ASSOC_ACTIVE, /* HAL_LED_RUN */
AR_MAC_LED_ASSOC_NONE,
AR_MAC_LED_ASSOC_NONE,
AR_MAC_LED_ASSOC_NONE,
};
uint32_t bits;
bits = OS_REG_READ(ah, AR_MAC_LED);
bits = (bits &~ AR_MAC_LED_MODE)
| SM(AR_MAC_LED_MODE_POWON, AR_MAC_LED_MODE)
#if 1
| SM(AR_MAC_LED_MODE_NETON, AR_MAC_LED_MODE)
#endif
;
bits = (bits &~ AR_MAC_LED_ASSOC)
| SM(ledbits[state & 0x7], AR_MAC_LED_ASSOC);
OS_REG_WRITE(ah, AR_MAC_LED, bits);
}
/*
* Reset the current hardware tsf for stamlme.
*/
void
ar5416ResetTsf(struct ath_hal *ah)
{
uint32_t v;
int i;
for (i = 0; i < 10; i++) {
v = OS_REG_READ(ah, AR_SLP32_MODE);
if ((v & AR_SLP32_TSF_WRITE_STATUS) == 0)
break;
OS_DELAY(10);
}
OS_REG_WRITE(ah, AR_RESET_TSF, AR_RESET_TSF_ONCE);
}
HAL_BOOL
ar5416SetAntennaSwitch(struct ath_hal *ah, HAL_ANT_SETTING settings)
{
return AH_TRUE;
}
/* Setup decompression for given key index */
HAL_BOOL
ar5416SetDecompMask(struct ath_hal *ah, uint16_t keyidx, int en)
{
return HAL_OK;
}
/* Setup coverage class */
void
ar5416SetCoverageClass(struct ath_hal *ah, uint8_t coverageclass, int now)
{
}
/*
* Return approximation of extension channel busy over an time interval
* 0% (clear) -> 100% (busy)
*
*/
uint32_t
ar5416Get11nExtBusy(struct ath_hal *ah)
{
struct ath_hal_5416 *ahp = AH5416(ah);
uint32_t busy; /* percentage */
uint32_t cycleCount, ctlBusy, extBusy;
ctlBusy = OS_REG_READ(ah, AR_RCCNT);
extBusy = OS_REG_READ(ah, AR_EXTRCCNT);
cycleCount = OS_REG_READ(ah, AR_CCCNT);
if (ahp->ah_cycleCount == 0 || ahp->ah_cycleCount > cycleCount) {
/*
* Cycle counter wrap (or initial call); it's not possible
* to accurately calculate a value because the registers
* right shift rather than wrap--so punt and return 0.
*/
busy = 0;
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: cycle counter wrap. ExtBusy = 0\n",
__func__);
} else {
uint32_t cycleDelta = cycleCount - ahp->ah_cycleCount;
uint32_t ctlBusyDelta = ctlBusy - ahp->ah_ctlBusy;
uint32_t extBusyDelta = extBusy - ahp->ah_extBusy;
uint32_t ctlClearDelta = 0;
/* Compute control channel rxclear.
* The cycle delta may be less than the control channel delta.
* This could be solved by freezing the timers (or an atomic read,
* if one was available). Checking for the condition should be
* sufficient.
*/
if (cycleDelta > ctlBusyDelta) {
ctlClearDelta = cycleDelta - ctlBusyDelta;
}
/* Compute ratio of extension channel busy to control channel clear
* as an approximation to extension channel cleanliness.
*
* According to the hardware folks, ext rxclear is undefined
* if the ctrl rxclear is de-asserted (i.e. busy)
*/
if (ctlClearDelta) {
busy = (extBusyDelta * 100) / ctlClearDelta;
} else {
busy = 100;
}
if (busy > 100) {
busy = 100;
}
#if 0
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: cycleDelta 0x%x, ctlBusyDelta 0x%x, "
"extBusyDelta 0x%x, ctlClearDelta 0x%x, "
"busy %d\n",
__func__, cycleDelta, ctlBusyDelta, extBusyDelta, ctlClearDelta, busy);
#endif
}
ahp->ah_cycleCount = cycleCount;
ahp->ah_ctlBusy = ctlBusy;
ahp->ah_extBusy = extBusy;
return busy;
}
/*
* Configure 20/40 operation
*
* 20/40 = joint rx clear (control and extension)
* 20 = rx clear (control)
*
* - NOTE: must stop MAC (tx) and requeue 40 MHz packets as 20 MHz when changing
* from 20/40 => 20 only
*/
void
ar5416Set11nMac2040(struct ath_hal *ah, HAL_HT_MACMODE mode)
{
uint32_t macmode;
/* Configure MAC for 20/40 operation */
if (mode == HAL_HT_MACMODE_2040) {
macmode = AR_2040_JOINED_RX_CLEAR;
} else {
macmode = 0;
}
OS_REG_WRITE(ah, AR_2040_MODE, macmode);
}
/*
* Get Rx clear (control/extension channel)
*
* Returns active low (busy) for ctrl/ext channel
* Owl 2.0
*/
HAL_HT_RXCLEAR
ar5416Get11nRxClear(struct ath_hal *ah)
{
HAL_HT_RXCLEAR rxclear = 0;
uint32_t val;
val = OS_REG_READ(ah, AR_DIAG_SW);
/* control channel */
if (val & AR_DIAG_RXCLEAR_CTL_LOW) {
rxclear |= HAL_RX_CLEAR_CTL_LOW;
}
/* extension channel */
if (val & AR_DIAG_RXCLEAR_CTL_LOW) {
rxclear |= HAL_RX_CLEAR_EXT_LOW;
}
return rxclear;
}
/*
* Set Rx clear (control/extension channel)
*
* Useful for forcing the channel to appear busy for
* debugging/diagnostics
* Owl 2.0
*/
void
ar5416Set11nRxClear(struct ath_hal *ah, HAL_HT_RXCLEAR rxclear)
{
/* control channel */
if (rxclear & HAL_RX_CLEAR_CTL_LOW) {
OS_REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_CTL_LOW);
} else {
OS_REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_CTL_LOW);
}
/* extension channel */
if (rxclear & HAL_RX_CLEAR_EXT_LOW) {
OS_REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_EXT_LOW);
} else {
OS_REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_EXT_LOW);
}
}
HAL_STATUS
ar5416GetCapability(struct ath_hal *ah, HAL_CAPABILITY_TYPE type,
uint32_t capability, uint32_t *result)
{
switch (type) {
case HAL_CAP_BB_HANG:
switch (capability) {
case HAL_BB_HANG_RIFS:
return AR_SREV_SOWL(ah) ? HAL_OK : HAL_ENOTSUPP;
case HAL_BB_HANG_DFS:
return AR_SREV_SOWL(ah) ? HAL_OK : HAL_ENOTSUPP;
case HAL_BB_HANG_RX_CLEAR:
return AR_SREV_MERLIN(ah) ? HAL_OK : HAL_ENOTSUPP;
}
break;
case HAL_CAP_MAC_HANG:
return ((ah->ah_macVersion == AR_XSREV_VERSION_OWL_PCI) ||
(ah->ah_macVersion == AR_XSREV_VERSION_OWL_PCIE) ||
AR_SREV_SOWL(ah)) ?
HAL_OK : HAL_ENOTSUPP;
default:
break;
}
return ar5212GetCapability(ah, type, capability, result);
}
static int ar5416DetectMacHang(struct ath_hal *ah);
static int ar5416DetectBBHang(struct ath_hal *ah);
HAL_BOOL
ar5416GetDiagState(struct ath_hal *ah, int request,
const void *args, uint32_t argsize,
void **result, uint32_t *resultsize)
{
struct ath_hal_5416 *ahp = AH5416(ah);
int hangs;
if (ath_hal_getdiagstate(ah, request, args, argsize, result, resultsize))
return AH_TRUE;
switch (request) {
case HAL_DIAG_EEPROM:
return ath_hal_eepromDiag(ah, request,
args, argsize, result, resultsize);
case HAL_DIAG_CHECK_HANGS:
if (argsize != sizeof(int))
return AH_FALSE;
hangs = *(const int *) args;
ahp->ah_hangs = 0;
if (hangs & HAL_BB_HANGS)
ahp->ah_hangs |= ar5416DetectBBHang(ah);
/* NB: if BB is hung MAC will be hung too so skip check */
if (ahp->ah_hangs == 0 && (hangs & HAL_MAC_HANGS))
ahp->ah_hangs |= ar5416DetectMacHang(ah);
*result = &ahp->ah_hangs;
*resultsize = sizeof(ahp->ah_hangs);
return AH_TRUE;
}
return ar5212GetDiagState(ah, request,
args, argsize, result, resultsize);
}
typedef struct {
uint32_t dma_dbg_3;
uint32_t dma_dbg_4;
uint32_t dma_dbg_5;
uint32_t dma_dbg_6;
} mac_dbg_regs_t;
typedef enum {
dcu_chain_state = 0x1,
dcu_complete_state = 0x2,
qcu_state = 0x4,
qcu_fsp_ok = 0x8,
qcu_fsp_state = 0x10,
qcu_stitch_state = 0x20,
qcu_fetch_state = 0x40,
qcu_complete_state = 0x80
} hal_mac_hangs_t;
typedef struct {
int states;
uint8_t dcu_chain_state;
uint8_t dcu_complete_state;
uint8_t qcu_state;
uint8_t qcu_fsp_ok;
uint8_t qcu_fsp_state;
uint8_t qcu_stitch_state;
uint8_t qcu_fetch_state;
uint8_t qcu_complete_state;
} hal_mac_hang_check_t;
static HAL_BOOL
ar5416CompareDbgHang(struct ath_hal *ah, const mac_dbg_regs_t *regs,
const hal_mac_hang_check_t *check)
{
int found_states;
found_states = 0;
if (check->states & dcu_chain_state) {
int i;
for (i = 0; i < 6; i++) {
if (((regs->dma_dbg_4 >> (5*i)) & 0x1f) ==
check->dcu_chain_state)
found_states |= dcu_chain_state;
}
for (i = 0; i < 4; i++) {
if (((regs->dma_dbg_5 >> (5*i)) & 0x1f) ==
check->dcu_chain_state)
found_states |= dcu_chain_state;
}
}
if (check->states & dcu_complete_state) {
if ((regs->dma_dbg_6 & 0x3) == check->dcu_complete_state)
found_states |= dcu_complete_state;
}
if (check->states & qcu_stitch_state) {
if (((regs->dma_dbg_3 >> 18) & 0xf) == check->qcu_stitch_state)
found_states |= qcu_stitch_state;
}
if (check->states & qcu_fetch_state) {
if (((regs->dma_dbg_3 >> 22) & 0xf) == check->qcu_fetch_state)
found_states |= qcu_fetch_state;
}
if (check->states & qcu_complete_state) {
if (((regs->dma_dbg_3 >> 26) & 0x7) == check->qcu_complete_state)
found_states |= qcu_complete_state;
}
return (found_states == check->states);
}
#define NUM_STATUS_READS 50
static int
ar5416DetectMacHang(struct ath_hal *ah)
{
static const hal_mac_hang_check_t hang_sig1 = {
.dcu_chain_state = 0x6,
.dcu_complete_state = 0x1,
.states = dcu_chain_state
| dcu_complete_state,
};
static const hal_mac_hang_check_t hang_sig2 = {
.qcu_stitch_state = 0x9,
.qcu_fetch_state = 0x8,
.qcu_complete_state = 0x4,
.states = qcu_stitch_state
| qcu_fetch_state
| qcu_complete_state,
};
mac_dbg_regs_t mac_dbg;
int i;
mac_dbg.dma_dbg_3 = OS_REG_READ(ah, AR_DMADBG_3);
mac_dbg.dma_dbg_4 = OS_REG_READ(ah, AR_DMADBG_4);
mac_dbg.dma_dbg_5 = OS_REG_READ(ah, AR_DMADBG_5);
mac_dbg.dma_dbg_6 = OS_REG_READ(ah, AR_DMADBG_6);
for (i = 1; i <= NUM_STATUS_READS; i++) {
if (mac_dbg.dma_dbg_3 != OS_REG_READ(ah, AR_DMADBG_3) ||
mac_dbg.dma_dbg_4 != OS_REG_READ(ah, AR_DMADBG_4) ||
mac_dbg.dma_dbg_5 != OS_REG_READ(ah, AR_DMADBG_5) ||
mac_dbg.dma_dbg_6 != OS_REG_READ(ah, AR_DMADBG_6))
return 0;
}
if (ar5416CompareDbgHang(ah, &mac_dbg, &hang_sig1))
return HAL_MAC_HANG_SIG1;
if (ar5416CompareDbgHang(ah, &mac_dbg, &hang_sig2))
return HAL_MAC_HANG_SIG2;
HALDEBUG(ah, HAL_DEBUG_ANY, "%s Found an unknown MAC hang signature "
"DMADBG_3=0x%x DMADBG_4=0x%x DMADBG_5=0x%x DMADBG_6=0x%x\n",
__func__, mac_dbg.dma_dbg_3, mac_dbg.dma_dbg_4, mac_dbg.dma_dbg_5,
mac_dbg.dma_dbg_6);
return HAL_MAC_HANG_UNKNOWN;
}
/*
* Determine if the baseband using the Observation Bus Register
*/
static int
ar5416DetectBBHang(struct ath_hal *ah)
{
#define N(a) (sizeof(a)/sizeof(a[0]))
/*
* Check the PCU Observation Bus 1 register (0x806c)
* NUM_STATUS_READS times
*
* 4 known BB hang signatures -
* [1] bits 8,9,11 are 0. State machine state (bits 25-31) is 0x1E
* [2] bits 8,9 are 1, bit 11 is 0. State machine state
* (bits 25-31) is 0x52
* [3] bits 8,9 are 1, bit 11 is 0. State machine state
* (bits 25-31) is 0x18
* [4] bit 10 is 1, bit 11 is 0. WEP state (bits 12-17) is 0x2,
* Rx State (bits 20-24) is 0x7.
*/
static const struct {
uint32_t val;
uint32_t mask;
int code;
} hang_list[] = {
/* Reg Value Reg Mask Hang Code XXX */
{ 0x1E000000, 0x7E000B00, HAL_BB_HANG_DFS },
{ 0x52000B00, 0x7E000B00, HAL_BB_HANG_RIFS },
{ 0x18000B00, 0x7E000B00, HAL_BB_HANG_RX_CLEAR },
{ 0x00702400, 0x7E7FFFEF, HAL_BB_HANG_RX_CLEAR }
};
uint32_t hang_sig;
int i;
hang_sig = OS_REG_READ(ah, AR_OBSERV_1);
for (i = 1; i <= NUM_STATUS_READS; i++) {
if (hang_sig != OS_REG_READ(ah, AR_OBSERV_1))
return 0;
}
for (i = 0; i < N(hang_list); i++)
if ((hang_sig & hang_list[i].mask) == hang_list[i].val) {
HALDEBUG(ah, HAL_DEBUG_ANY,
"%s BB hang, signature 0x%x, code 0x%x\n",
__func__, hang_sig, hang_list[i].code);
return hang_list[i].code;
}
HALDEBUG(ah, HAL_DEBUG_ANY, "%s Found an unknown BB hang signature! "
"<0x806c>=0x%x\n", __func__, hang_sig);
return HAL_BB_HANG_UNKNOWN;
#undef N
}
#undef NUM_STATUS_READS
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