From 523f11b5d4fd72efb72b04cd7006bfd1d1d4f341 Mon Sep 17 00:00:00 2001 From: Srinivas Kandagatla Date: Thu, 16 Jan 2014 10:52:14 +0000 Subject: [PATCH] net: stmmac: move hardware setup for stmmac_open to new function This patch moves hardware setup part of the code in stmmac_open to a new function stmmac_hw_setup, the reason for doing this is to make hw initialization independent function so that PM functions can re-use it to re-initialize the IP after returning from low power state. This will also avoid code duplication across stmmac_resume/restore and stmmac_open. Signed-off-by: Srinivas Kandagatla Acked-by: Giuseppe Cavallaro Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 155 ++++++++++++---------- 1 file changed, 88 insertions(+), 67 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 532f2b4..341c8dc3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -1586,6 +1586,86 @@ static void stmmac_init_tx_coalesce(struct stmmac_priv *priv) } /** + * stmmac_hw_setup: setup mac in a usable state. + * @dev : pointer to the device structure. + * Description: + * This function sets up the ip in a usable state. + * Return value: + * 0 on success and an appropriate (-)ve integer as defined in errno.h + * file on failure. + */ +static int stmmac_hw_setup(struct net_device *dev) +{ + struct stmmac_priv *priv = netdev_priv(dev); + int ret; + + ret = init_dma_desc_rings(dev); + if (ret < 0) { + pr_err("%s: DMA descriptors initialization failed\n", __func__); + return ret; + } + /* DMA initialization and SW reset */ + ret = stmmac_init_dma_engine(priv); + if (ret < 0) { + pr_err("%s: DMA engine initialization failed\n", __func__); + return ret; + } + + /* Copy the MAC addr into the HW */ + priv->hw->mac->set_umac_addr(priv->ioaddr, dev->dev_addr, 0); + + /* If required, perform hw setup of the bus. */ + if (priv->plat->bus_setup) + priv->plat->bus_setup(priv->ioaddr); + + /* Initialize the MAC Core */ + priv->hw->mac->core_init(priv->ioaddr); + + /* Enable the MAC Rx/Tx */ + stmmac_set_mac(priv->ioaddr, true); + + /* Set the HW DMA mode and the COE */ + stmmac_dma_operation_mode(priv); + + stmmac_mmc_setup(priv); + + ret = stmmac_init_ptp(priv); + if (ret) + pr_warn("%s: failed PTP initialisation\n", __func__); + +#ifdef CONFIG_STMMAC_DEBUG_FS + ret = stmmac_init_fs(dev); + if (ret < 0) + pr_warn("%s: failed debugFS registration\n", __func__); +#endif + /* Start the ball rolling... */ + pr_debug("%s: DMA RX/TX processes started...\n", dev->name); + priv->hw->dma->start_tx(priv->ioaddr); + priv->hw->dma->start_rx(priv->ioaddr); + + /* Dump DMA/MAC registers */ + if (netif_msg_hw(priv)) { + priv->hw->mac->dump_regs(priv->ioaddr); + priv->hw->dma->dump_regs(priv->ioaddr); + } + priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS; + + priv->eee_enabled = stmmac_eee_init(priv); + + stmmac_init_tx_coalesce(priv); + + if ((priv->use_riwt) && (priv->hw->dma->rx_watchdog)) { + priv->rx_riwt = MAX_DMA_RIWT; + priv->hw->dma->rx_watchdog(priv->ioaddr, MAX_DMA_RIWT); + } + + if (priv->pcs && priv->hw->mac->ctrl_ane) + priv->hw->mac->ctrl_ane(priv->ioaddr, 0); + + return 0; +} + +/** * stmmac_open - open entry point of the driver * @dev : pointer to the device structure. * Description: @@ -1613,6 +1693,10 @@ static int stmmac_open(struct net_device *dev) } } + /* Extra statistics */ + memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats)); + priv->xstats.threshold = tc; + /* Create and initialize the TX/RX descriptors chains. */ priv->dma_tx_size = STMMAC_ALIGN(dma_txsize); priv->dma_rx_size = STMMAC_ALIGN(dma_rxsize); @@ -1624,28 +1708,14 @@ static int stmmac_open(struct net_device *dev) goto dma_desc_error; } - ret = init_dma_desc_rings(dev); + ret = stmmac_hw_setup(dev); if (ret < 0) { - pr_err("%s: DMA descriptors initialization failed\n", __func__); - goto dma_desc_error; - } - - /* DMA initialization and SW reset */ - ret = stmmac_init_dma_engine(priv); - if (ret < 0) { - pr_err("%s: DMA engine initialization failed\n", __func__); + pr_err("%s: Hw setup failed\n", __func__); goto init_error; } - /* Copy the MAC addr into the HW */ - priv->hw->mac->set_umac_addr(priv->ioaddr, dev->dev_addr, 0); - - /* If required, perform hw setup of the bus. */ - if (priv->plat->bus_setup) - priv->plat->bus_setup(priv->ioaddr); - - /* Initialize the MAC Core */ - priv->hw->mac->core_init(priv->ioaddr); + if (priv->phydev) + phy_start(priv->phydev); /* Request the IRQ lines */ ret = request_irq(dev->irq, stmmac_interrupt, @@ -1678,55 +1748,6 @@ static int stmmac_open(struct net_device *dev) } } - /* Enable the MAC Rx/Tx */ - stmmac_set_mac(priv->ioaddr, true); - - /* Set the HW DMA mode and the COE */ - stmmac_dma_operation_mode(priv); - - /* Extra statistics */ - memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats)); - priv->xstats.threshold = tc; - - stmmac_mmc_setup(priv); - - ret = stmmac_init_ptp(priv); - if (ret) - pr_warn("%s: failed PTP initialisation\n", __func__); - -#ifdef CONFIG_STMMAC_DEBUG_FS - ret = stmmac_init_fs(dev); - if (ret < 0) - pr_warn("%s: failed debugFS registration\n", __func__); -#endif - /* Start the ball rolling... */ - pr_debug("%s: DMA RX/TX processes started...\n", dev->name); - priv->hw->dma->start_tx(priv->ioaddr); - priv->hw->dma->start_rx(priv->ioaddr); - - /* Dump DMA/MAC registers */ - if (netif_msg_hw(priv)) { - priv->hw->mac->dump_regs(priv->ioaddr); - priv->hw->dma->dump_regs(priv->ioaddr); - } - - if (priv->phydev) - phy_start(priv->phydev); - - priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS; - - priv->eee_enabled = stmmac_eee_init(priv); - - stmmac_init_tx_coalesce(priv); - - if ((priv->use_riwt) && (priv->hw->dma->rx_watchdog)) { - priv->rx_riwt = MAX_DMA_RIWT; - priv->hw->dma->rx_watchdog(priv->ioaddr, MAX_DMA_RIWT); - } - - if (priv->pcs && priv->hw->mac->ctrl_ane) - priv->hw->mac->ctrl_ane(priv->ioaddr, 0); - napi_enable(&priv->napi); netif_start_queue(dev); -- 1.8.5.5