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iwlagn: enable shadow register 

For 6000 series devices and up, enable automatic update MAC's register
for better power usage in PSP mode

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2010-11-10 09:56:50 -08:00 committed by John W. Linville
parent 6fe8efb221
commit f81c1f4838
6 changed files with 70 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/iwlwifi/iwl-6000.c
View File

@ -487,6 +487,7 @@ static struct iwl_base_params iwl6000_base_params = {
.ucode_tracing = true,
.sensitivity_calib_by_driver = true,
.chain_noise_calib_by_driver = true,
.shadow_reg_enable = true,
};
static struct iwl_base_params iwl6050_base_params = {
@ -510,6 +511,7 @@ static struct iwl_base_params iwl6050_base_params = {
.ucode_tracing = true,
.sensitivity_calib_by_driver = true,
.chain_noise_calib_by_driver = true,
.shadow_reg_enable = true,
};
static struct iwl_base_params iwl6000_coex_base_params = {
.eeprom_size = OTP_LOW_IMAGE_SIZE,
@ -532,6 +534,7 @@ static struct iwl_base_params iwl6000_coex_base_params = {
.ucode_tracing = true,
.sensitivity_calib_by_driver = true,
.chain_noise_calib_by_driver = true,
.shadow_reg_enable = true,
};
static struct iwl_ht_params iwl6000_ht_params = {

6
drivers/net/wireless/iwlwifi/iwl-agn-lib.c
View File

@ -753,6 +753,12 @@ int iwlagn_hw_nic_init(struct iwl_priv *priv)
} else
iwlagn_txq_ctx_reset(priv);
if (priv->cfg->base_params->shadow_reg_enable) {
/* enable shadow regs in HW */
iwl_set_bit(priv, CSR_MAC_SHADOW_REG_CTRL,
0x800FFFFF);
}
set_bit(STATUS_INIT, &priv->status);
return 0;

2
drivers/net/wireless/iwlwifi/iwl-core.h
View File

@ -290,6 +290,7 @@ struct iwl_mod_params {
* sensitivity calibration operation
* @chain_noise_calib_by_driver: driver has the capability to perform
* chain noise calibration operation
* @shadow_reg_enable: HW shadhow register bit
*/
struct iwl_base_params {
int eeprom_size;
@ -320,6 +321,7 @@ struct iwl_base_params {
const bool ucode_tracing;
const bool sensitivity_calib_by_driver;
const bool chain_noise_calib_by_driver;
const bool shadow_reg_enable;
};
/*
* @advanced_bt_coexist: support advanced bt coexist

2
drivers/net/wireless/iwlwifi/iwl-csr.h
View File

@ -132,6 +132,8 @@
#define CSR_LED_REG (CSR_BASE+0x094)
#define CSR_DRAM_INT_TBL_REG (CSR_BASE+0x0A0)
#define CSR_MAC_SHADOW_REG_CTRL (CSR_BASE+0x0A8) /* 6000 and up */
/* GIO Chicken Bits (PCI Express bus link power management) */
#define CSR_GIO_CHICKEN_BITS (CSR_BASE+0x100)

45
drivers/net/wireless/iwlwifi/iwl-rx.c
View File

@ -134,28 +134,37 @@ void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q
if (q->need_update == 0)
goto exit_unlock;
/* If power-saving is in use, make sure device is awake */
if (test_bit(STATUS_POWER_PMI, &priv->status)) {
reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
IWL_DEBUG_INFO(priv, "Rx queue requesting wakeup, GP1 = 0x%x\n",
reg);
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
goto exit_unlock;
}
q->write_actual = (q->write & ~0x7);
iwl_write_direct32(priv, rx_wrt_ptr_reg, q->write_actual);
/* Else device is assumed to be awake */
} else {
if (priv->cfg->base_params->shadow_reg_enable) {
/* shadow register enabled */
/* Device expects a multiple of 8 */
q->write_actual = (q->write & ~0x7);
iwl_write32(priv, rx_wrt_ptr_reg, q->write_actual);
}
} else {
/* If power-saving is in use, make sure device is awake */
if (test_bit(STATUS_POWER_PMI, &priv->status)) {
reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
IWL_DEBUG_INFO(priv,
"Rx queue requesting wakeup,"
" GP1 = 0x%x\n", reg);
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
goto exit_unlock;
}
q->write_actual = (q->write & ~0x7);
iwl_write_direct32(priv, rx_wrt_ptr_reg,
q->write_actual);
/* Else device is assumed to be awake */
} else {
/* Device expects a multiple of 8 */
q->write_actual = (q->write & ~0x7);
iwl_write_direct32(priv, rx_wrt_ptr_reg,
q->write_actual);
}
}
q->need_update = 0;
exit_unlock:

51
drivers/net/wireless/iwlwifi/iwl-tx.c
View File

@ -49,30 +49,39 @@ void iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq)
if (txq->need_update == 0)
return;
/* if we're trying to save power */
if (test_bit(STATUS_POWER_PMI, &priv->status)) {
/* wake up nic if it's powered down ...
* uCode will wake up, and interrupt us again, so next
* time we'll skip this part. */
reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
IWL_DEBUG_INFO(priv, "Tx queue %d requesting wakeup, GP1 = 0x%x\n",
txq_id, reg);
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
return;
}
iwl_write_direct32(priv, HBUS_TARG_WRPTR,
txq->q.write_ptr | (txq_id << 8));
/* else not in power-save mode, uCode will never sleep when we're
* trying to tx (during RFKILL, we're not trying to tx). */
} else
if (priv->cfg->base_params->shadow_reg_enable) {
/* shadow register enabled */
iwl_write32(priv, HBUS_TARG_WRPTR,
txq->q.write_ptr | (txq_id << 8));
} else {
/* if we're trying to save power */
if (test_bit(STATUS_POWER_PMI, &priv->status)) {
/* wake up nic if it's powered down ...
* uCode will wake up, and interrupt us again, so next
* time we'll skip this part. */
reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
IWL_DEBUG_INFO(priv,
"Tx queue %d requesting wakeup,"
" GP1 = 0x%x\n", txq_id, reg);
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
return;
}
iwl_write_direct32(priv, HBUS_TARG_WRPTR,
txq->q.write_ptr | (txq_id << 8));
/*
* else not in power-save mode,
* uCode will never sleep when we're
* trying to tx (during RFKILL, we're not trying to tx).
*/
} else
iwl_write32(priv, HBUS_TARG_WRPTR,
txq->q.write_ptr | (txq_id << 8));
}
txq->need_update = 0;
}
EXPORT_SYMBOL(iwl_txq_update_write_ptr);