From: Tomas Winkler Date: Thu, 29 May 2008 08:34:57 +0000 (+0800) Subject: iwlwifi: implement apm reset flow X-Git-Tag: v2.6.27-rc1~969^2~337^2~40 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f066108d15d06ec3534434333f0274c868fe798;p=linux-2.6 iwlwifi: implement apm reset flow This patch implements apm reset flow for 4965 and 5000. Signed-off-by: Tomas Winkler Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index bf0bd4af10..646c589b82 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -642,9 +642,9 @@ void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv) iwl_hw_txq_ctx_free(priv); } -int iwl4965_hw_nic_reset(struct iwl_priv *priv) +static int iwl4965_apm_reset(struct iwl_priv *priv) { - int rc = 0; + int ret = 0; unsigned long flags; iwl4965_hw_nic_stop_master(priv); @@ -655,33 +655,40 @@ int iwl4965_hw_nic_reset(struct iwl_priv *priv) udelay(10); + /* FIXME: put here L1A -L0S w/a */ + iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - rc = iwl_poll_bit(priv, CSR_RESET, + ret = iwl_poll_bit(priv, CSR_RESET, CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25); + if (ret) + goto out; + udelay(10); - rc = iwl_grab_nic_access(priv); - if (!rc) { - iwl_write_prph(priv, APMG_CLK_EN_REG, - APMG_CLK_VAL_DMA_CLK_RQT | - APMG_CLK_VAL_BSM_CLK_RQT); + ret = iwl_grab_nic_access(priv); + if (ret) + goto out; + /* Enable DMA and BSM Clock */ + iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT | + APMG_CLK_VAL_BSM_CLK_RQT); - udelay(10); + udelay(10); - iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG, - APMG_PCIDEV_STT_VAL_L1_ACT_DIS); + /* disable L1A */ + iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG, + APMG_PCIDEV_STT_VAL_L1_ACT_DIS); - iwl_release_nic_access(priv); - } + iwl_release_nic_access(priv); clear_bit(STATUS_HCMD_ACTIVE, &priv->status); wake_up_interruptible(&priv->wait_command_queue); +out: spin_unlock_irqrestore(&priv->lock, flags); - return rc; + return ret; } @@ -3617,6 +3624,7 @@ static struct iwl_lib_ops iwl4965_lib = { .load_ucode = iwl4965_load_bsm, .apm_ops = { .init = iwl4965_apm_init, + .reset = iwl4965_apm_reset, .config = iwl4965_nic_config, .set_pwr_src = iwl4965_set_pwr_src, }, diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c index b1c50453a7..10054bdf3e 100644 --- a/drivers/net/wireless/iwlwifi/iwl-5000.c +++ b/drivers/net/wireless/iwlwifi/iwl-5000.c @@ -100,6 +100,59 @@ static int iwl5000_apm_init(struct iwl_priv *priv) return ret; } +static int iwl5000_apm_reset(struct iwl_priv *priv) +{ + int ret = 0; + unsigned long flags; + + iwl4965_hw_nic_stop_master(priv); + + spin_lock_irqsave(&priv->lock, flags); + + iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); + + udelay(10); + + + /* FIXME: put here L1A -L0S w/a */ + + iwl_set_bit(priv, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL); + + /* set "initialization complete" bit to move adapter + * D0U* --> D0A* state */ + iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); + + /* wait for clock stabilization */ + ret = iwl_poll_bit(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("Failed to init the card\n"); + goto out; + } + + ret = iwl_grab_nic_access(priv); + if (ret) + goto out; + + /* enable DMA */ + iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT); + + udelay(20); + + /* disable L1-Active */ + iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG, + APMG_PCIDEV_STT_VAL_L1_ACT_DIS); + + iwl_release_nic_access(priv); + +out: + spin_unlock_irqrestore(&priv->lock, flags); + + return ret; +} + + static void iwl5000_nic_config(struct iwl_priv *priv) { unsigned long flags; @@ -805,6 +858,7 @@ static struct iwl_lib_ops iwl5000_lib = { .alive_notify = iwl5000_alive_notify, .apm_ops = { .init = iwl5000_apm_init, + .reset = iwl5000_apm_reset, .config = iwl5000_nic_config, .set_pwr_src = iwl4965_set_pwr_src, }, diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h index 9392fcf6ca..d82660c88a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.h +++ b/drivers/net/wireless/iwlwifi/iwl-core.h @@ -124,6 +124,7 @@ struct iwl_lib_ops { /* power management */ struct { int (*init)(struct iwl_priv *priv); + int (*reset)(struct iwl_priv *priv); void (*config)(struct iwl_priv *priv); int (*set_pwr_src)(struct iwl_priv *priv, enum iwl_pwr_src src); } apm_ops; diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h index da4d606615..d193da3a63 100644 --- a/drivers/net/wireless/iwlwifi/iwl-dev.h +++ b/drivers/net/wireless/iwlwifi/iwl-dev.h @@ -688,7 +688,6 @@ extern int iwl4965_hw_rxq_stop(struct iwl_priv *priv); extern int iwl4965_hw_set_hw_params(struct iwl_priv *priv); extern int iwl4965_hw_nic_stop_master(struct iwl_priv *priv); extern void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv); -extern int iwl4965_hw_nic_reset(struct iwl_priv *priv); extern int iwl4965_hw_get_temperature(struct iwl_priv *priv); extern unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv, struct iwl_frame *frame, u8 rate); diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c index ee9fe56552..af0ffd3aeb 100644 --- a/drivers/net/wireless/iwlwifi/iwl4965-base.c +++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c @@ -3417,9 +3417,8 @@ static void __iwl4965_down(struct iwl_priv *priv) udelay(5); - iwl4965_hw_nic_stop_master(priv); - iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); - iwl4965_hw_nic_reset(priv); + /* FIXME: apm_ops.suspend(priv) */ + priv->cfg->ops->lib->apm_ops.reset(priv); priv->cfg->ops->lib->free_shared_mem(priv); exit: