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