Skip to content

Commit

Permalink
iwlwifi: move apm_init to start_hw
Browse files Browse the repository at this point in the history 
This is transport related

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
  • Loading branch information
Emmanuel Grumbach authored and Wey-Yi Guy committed Feb 2, 2012
1 parent ebb7678 commit a6c684e
Show file tree
Hide file tree
Showing 4 changed files with 87 additions and 89 deletions.
2 changes: 0 additions & 2 deletions drivers/net/wireless/iwlwifi/iwl-agn.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1836,8 +1836,6 @@ int iwl_probe(struct iwl_bus *bus, const struct iwl_trans_ops *trans_ops,
/*****************
* 4. Read EEPROM
*****************/
/* switch the NIC on before accessing the EEPROM */
iwl_apm_init(priv);
/* Read the EEPROM */
err = iwl_eeprom_init(priv, hw_rev);
/* Reset chip to save power until we load uCode during "up". */
Expand Down
85 changes: 0 additions & 85 deletions drivers/net/wireless/iwlwifi/iwl-core.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -923,91 +923,6 @@ void iwl_apm_stop(struct iwl_priv *priv)
CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
}


/*
* Start up NIC's basic functionality after it has been reset
* (e.g. after platform boot, or shutdown via iwl_apm_stop())
* NOTE: This does not load uCode nor start the embedded processor
*/
int iwl_apm_init(struct iwl_priv *priv)
{
int ret = 0;
IWL_DEBUG_INFO(priv, "Init card's basic functions\n");

/*
* Use "set_bit" below rather than "write", to preserve any hardware
* bits already set by default after reset.
*/

/* Disable L0S exit timer (platform NMI Work/Around) */
iwl_set_bit(trans(priv), CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);

/*
* Disable L0s without affecting L1;
* don't wait for ICH L0s (ICH bug W/A)
*/
iwl_set_bit(trans(priv), CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);

/* Set FH wait threshold to maximum (HW error during stress W/A) */
iwl_set_bit(trans(priv), CSR_DBG_HPET_MEM_REG,
CSR_DBG_HPET_MEM_REG_VAL);

/*
* Enable HAP INTA (interrupt from management bus) to
* wake device's PCI Express link L1a -> L0s
*/
iwl_set_bit(trans(priv), CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);

bus_apm_config(bus(priv));

/* Configure analog phase-lock-loop before activating to D0A */
if (cfg(priv)->base_params->pll_cfg_val)
iwl_set_bit(trans(priv), CSR_ANA_PLL_CFG,
cfg(priv)->base_params->pll_cfg_val);

/*
* Set "initialization complete" bit to move adapter from
* D0U* --> D0A* (powered-up active) state.
*/
iwl_set_bit(trans(priv), CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);

/*
* Wait for clock stabilization; once stabilized, access to
* device-internal resources is supported, e.g. iwl_write_prph()
* and accesses to uCode SRAM.
*/
ret = iwl_poll_bit(trans(priv), CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
if (ret < 0) {
IWL_DEBUG_INFO(priv, "Failed to init the card\n");
goto out;
}

/*
* Enable DMA clock and wait for it to stabilize.
*
* Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
* do not disable clocks. This preserves any hardware bits already
* set by default in "CLK_CTRL_REG" after reset.
*/
iwl_write_prph(trans(priv), APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
udelay(20);

/* Disable L1-Active */
iwl_set_bits_prph(trans(priv), APMG_PCIDEV_STT_REG,
APMG_PCIDEV_STT_VAL_L1_ACT_DIS);

set_bit(STATUS_DEVICE_ENABLED, &priv->shrd->status);

out:
return ret;
}


int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
int ret;
Expand Down
1 change: 0 additions & 1 deletion drivers/net/wireless/iwlwifi/iwl-shared.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -544,7 +544,6 @@ void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state);
void iwl_nic_config(struct iwl_priv *priv);
void iwl_free_skb(struct iwl_priv *priv, struct sk_buff *skb);
void iwl_apm_stop(struct iwl_priv *priv);
int iwl_apm_init(struct iwl_priv *priv);
void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand);
const char *get_cmd_string(u8 cmd);
bool iwl_check_for_ct_kill(struct iwl_priv *priv);
Expand Down
88 changes: 87 additions & 1 deletion drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -74,6 +74,7 @@
#include "iwl-shared.h"
#include "iwl-eeprom.h"
#include "iwl-agn-hw.h"
#include "iwl-core.h"

static int iwl_trans_rx_alloc(struct iwl_trans *trans)
{
Expand Down Expand Up @@ -631,13 +632,95 @@ static void iwl_set_pwr_vmain(struct iwl_trans *trans)
~APMG_PS_CTRL_MSK_PWR_SRC);
}

/*
* Start up NIC's basic functionality after it has been reset
* (e.g. after platform boot, or shutdown via iwl_apm_stop())
* NOTE: This does not load uCode nor start the embedded processor
*/
static int iwl_apm_init(struct iwl_trans *trans)
{
int ret = 0;
IWL_DEBUG_INFO(trans, "Init card's basic functions\n");

/*
* Use "set_bit" below rather than "write", to preserve any hardware
* bits already set by default after reset.
*/

/* Disable L0S exit timer (platform NMI Work/Around) */
iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);

/*
* Disable L0s without affecting L1;
* don't wait for ICH L0s (ICH bug W/A)
*/
iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);

/* Set FH wait threshold to maximum (HW error during stress W/A) */
iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);

/*
* Enable HAP INTA (interrupt from management bus) to
* wake device's PCI Express link L1a -> L0s
*/
iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);

bus_apm_config(bus(trans));

/* Configure analog phase-lock-loop before activating to D0A */
if (cfg(trans)->base_params->pll_cfg_val)
iwl_set_bit(trans, CSR_ANA_PLL_CFG,
cfg(trans)->base_params->pll_cfg_val);

/*
* Set "initialization complete" bit to move adapter from
* D0U* --> D0A* (powered-up active) state.
*/
iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);

/*
* Wait for clock stabilization; once stabilized, access to
* device-internal resources is supported, e.g. iwl_write_prph()
* and accesses to uCode SRAM.
*/
ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
if (ret < 0) {
IWL_DEBUG_INFO(trans, "Failed to init the card\n");
goto out;
}

/*
* Enable DMA clock and wait for it to stabilize.
*
* Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
* do not disable clocks. This preserves any hardware bits already
* set by default in "CLK_CTRL_REG" after reset.
*/
iwl_write_prph(trans, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
udelay(20);

/* Disable L1-Active */
iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
APMG_PCIDEV_STT_VAL_L1_ACT_DIS);

set_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status);

out:
return ret;
}

static int iwl_nic_init(struct iwl_trans *trans)
{
unsigned long flags;

/* nic_init */
spin_lock_irqsave(&trans->shrd->lock, flags);
iwl_apm_init(priv(trans));
iwl_apm_init(trans);

/* Set interrupt coalescing calibration timer to default (512 usecs) */
iwl_write8(trans, CSR_INT_COALESCING,
Expand Down Expand Up @@ -1267,6 +1350,9 @@ static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
IWL_ERR(trans, "Error while preparing HW: %d", err);
goto error;
}

iwl_apm_init(trans);

return err;

error:
Expand Down

0 comments on commit a6c684e

Please sign in to comment.