diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/pcie.c')
-rw-r--r-- | drivers/net/wireless/mwifiex/pcie.c | 203 |
1 files changed, 108 insertions, 95 deletions
diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c index feb2046..856959b 100644 --- a/drivers/net/wireless/mwifiex/pcie.c +++ b/drivers/net/wireless/mwifiex/pcie.c @@ -36,8 +36,6 @@ static u8 user_rmmod; static struct mwifiex_if_ops pcie_ops; static struct semaphore add_remove_card_sem; -static int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter); -static int mwifiex_pcie_resume(struct pci_dev *pdev); static int mwifiex_map_pci_memory(struct mwifiex_adapter *adapter, struct sk_buff *skb, @@ -78,6 +76,82 @@ static bool mwifiex_pcie_ok_to_access_hw(struct mwifiex_adapter *adapter) return false; } +#ifdef CONFIG_PM +/* + * Kernel needs to suspend all functions separately. Therefore all + * registered functions must have drivers with suspend and resume + * methods. Failing that the kernel simply removes the whole card. + * + * If already not suspended, this function allocates and sends a host + * sleep activate request to the firmware and turns off the traffic. + */ +static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct mwifiex_adapter *adapter; + struct pcie_service_card *card; + int hs_actived; + + if (pdev) { + card = (struct pcie_service_card *) pci_get_drvdata(pdev); + if (!card || !card->adapter) { + pr_err("Card or adapter structure is not valid\n"); + return 0; + } + } else { + pr_err("PCIE device is not specified\n"); + return 0; + } + + adapter = card->adapter; + + hs_actived = mwifiex_enable_hs(adapter); + + /* Indicate device suspended */ + adapter->is_suspended = true; + + return 0; +} + +/* + * Kernel needs to suspend all functions separately. Therefore all + * registered functions must have drivers with suspend and resume + * methods. Failing that the kernel simply removes the whole card. + * + * If already not resumed, this function turns on the traffic and + * sends a host sleep cancel request to the firmware. + */ +static int mwifiex_pcie_resume(struct pci_dev *pdev) +{ + struct mwifiex_adapter *adapter; + struct pcie_service_card *card; + + if (pdev) { + card = (struct pcie_service_card *) pci_get_drvdata(pdev); + if (!card || !card->adapter) { + pr_err("Card or adapter structure is not valid\n"); + return 0; + } + } else { + pr_err("PCIE device is not specified\n"); + return 0; + } + + adapter = card->adapter; + + if (!adapter->is_suspended) { + dev_warn(adapter->dev, "Device already resumed\n"); + return 0; + } + + adapter->is_suspended = false; + + mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), + MWIFIEX_ASYNC_CMD); + + return 0; +} +#endif + /* * This function probes an mwifiex device and registers it. It allocates * the card structure, enables PCIE function number and initiates the @@ -159,80 +233,6 @@ static void mwifiex_pcie_remove(struct pci_dev *pdev) kfree(card); } -/* - * Kernel needs to suspend all functions separately. Therefore all - * registered functions must have drivers with suspend and resume - * methods. Failing that the kernel simply removes the whole card. - * - * If already not suspended, this function allocates and sends a host - * sleep activate request to the firmware and turns off the traffic. - */ -static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state) -{ - struct mwifiex_adapter *adapter; - struct pcie_service_card *card; - int hs_actived; - - if (pdev) { - card = (struct pcie_service_card *) pci_get_drvdata(pdev); - if (!card || !card->adapter) { - pr_err("Card or adapter structure is not valid\n"); - return 0; - } - } else { - pr_err("PCIE device is not specified\n"); - return 0; - } - - adapter = card->adapter; - - hs_actived = mwifiex_enable_hs(adapter); - - /* Indicate device suspended */ - adapter->is_suspended = true; - - return 0; -} - -/* - * Kernel needs to suspend all functions separately. Therefore all - * registered functions must have drivers with suspend and resume - * methods. Failing that the kernel simply removes the whole card. - * - * If already not resumed, this function turns on the traffic and - * sends a host sleep cancel request to the firmware. - */ -static int mwifiex_pcie_resume(struct pci_dev *pdev) -{ - struct mwifiex_adapter *adapter; - struct pcie_service_card *card; - - if (pdev) { - card = (struct pcie_service_card *) pci_get_drvdata(pdev); - if (!card || !card->adapter) { - pr_err("Card or adapter structure is not valid\n"); - return 0; - } - } else { - pr_err("PCIE device is not specified\n"); - return 0; - } - - adapter = card->adapter; - - if (!adapter->is_suspended) { - dev_warn(adapter->dev, "Device already resumed\n"); - return 0; - } - - adapter->is_suspended = false; - - mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), - MWIFIEX_ASYNC_CMD); - - return 0; -} - static DEFINE_PCI_DEVICE_TABLE(mwifiex_ids) = { { PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8766P, @@ -287,18 +287,13 @@ static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data) } /* - * This function wakes up the card. - * - * A host power up command is written to the card configuration - * register to wake up the card. + * This function adds delay loop to ensure FW is awake before proceeding. */ -static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) +static void mwifiex_pcie_dev_wakeup_delay(struct mwifiex_adapter *adapter) { int i = 0; - struct pcie_service_card *card = adapter->card; - const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; - while (reg->sleep_cookie && mwifiex_pcie_ok_to_access_hw(adapter)) { + while (mwifiex_pcie_ok_to_access_hw(adapter)) { i++; usleep_range(10, 20); /* 50ms max wait */ @@ -306,16 +301,32 @@ static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) break; } + return; +} + +/* This function wakes up the card by reading fw_status register. */ +static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) +{ + u32 fw_status; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + dev_dbg(adapter->dev, "event: Wakeup device...\n"); - /* Enable interrupts or any chip access will wakeup device */ - if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, HOST_INTR_MASK)) { - dev_warn(adapter->dev, "Enable host interrupt failed\n"); + if (reg->sleep_cookie) + mwifiex_pcie_dev_wakeup_delay(adapter); + + /* Reading fw_status register will wakeup device */ + if (mwifiex_read_reg(adapter, reg->fw_status, &fw_status)) { + dev_warn(adapter->dev, "Reading fw_status register failed\n"); return -1; } - dev_dbg(adapter->dev, "PCIE wakeup: Setting PS_STATE_AWAKE\n"); - adapter->ps_state = PS_STATE_AWAKE; + if (reg->sleep_cookie) { + mwifiex_pcie_dev_wakeup_delay(adapter); + dev_dbg(adapter->dev, "PCIE wakeup: Setting PS_STATE_AWAKE\n"); + adapter->ps_state = PS_STATE_AWAKE; + } return 0; } @@ -1030,8 +1041,8 @@ mwifiex_pcie_send_data(struct mwifiex_adapter *adapter, struct sk_buff *skb, u32 wrindx, num_tx_buffs, rx_val; int ret; dma_addr_t buf_pa; - struct mwifiex_pcie_buf_desc *desc; - struct mwifiex_pfu_buf_desc *desc2; + struct mwifiex_pcie_buf_desc *desc = NULL; + struct mwifiex_pfu_buf_desc *desc2 = NULL; __le16 *tmp; if (!(skb->data && skb->len)) { @@ -1984,12 +1995,13 @@ static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter) } } } else if (!adapter->pps_uapsd_mode && - adapter->ps_state == PS_STATE_SLEEP) { + adapter->ps_state == PS_STATE_SLEEP && + mwifiex_pcie_ok_to_access_hw(adapter)) { /* Potentially for PCIe we could get other * interrupts like shared. Don't change power * state until cookie is set */ - if (mwifiex_pcie_ok_to_access_hw(adapter)) - adapter->ps_state = PS_STATE_AWAKE; + adapter->ps_state = PS_STATE_AWAKE; + adapter->pm_wakeup_fw_try = false; } } } @@ -2112,7 +2124,8 @@ static int mwifiex_process_int_status(struct mwifiex_adapter *adapter) } dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n", adapter->cmd_sent, adapter->data_sent); - mwifiex_pcie_enable_host_int(adapter); + if (adapter->ps_state != PS_STATE_SLEEP) + mwifiex_pcie_enable_host_int(adapter); return 0; } |