target/linux/sunxi/patches-3.13/151-4-stmmac-fixup-4.patch

   1 From 523f11b5d4fd72efb72b04cd7006bfd1d1d4f341 Mon Sep 17 00:00:00 2001
   2 From: Srinivas Kandagatla <srinivas.kandagatla@st.com>
   3 Date: Thu, 16 Jan 2014 10:52:14 +0000
   4 Subject: [PATCH] net: stmmac: move hardware setup for stmmac_open to new
   5  function
   6
   7 This patch moves hardware setup part of the code in stmmac_open to a new
   8 function stmmac_hw_setup, the reason for doing this is to make hw
   9 initialization independent function so that PM functions can re-use it to
  10 re-initialize the IP after returning from low power state.
  11 This will also avoid code duplication across stmmac_resume/restore and
  12 stmmac_open.
  13
  14 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
  15 Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
  16 Signed-off-by: David S. Miller <davem@davemloft.net>
  17 ---
  18  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 155 ++++++++++++----------
  19  1 file changed, 88 insertions(+), 67 deletions(-)
  20
  21 diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  22 index 532f2b4..341c8dc3 100644
  23 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  24 +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  25 @@ -1586,6 +1586,86 @@ static void stmmac_init_tx_coalesce(struct stmmac_priv *priv)
  26  }
  27
  28  /**
  29 + * stmmac_hw_setup: setup mac in a usable state.
  30 + *  @dev : pointer to the device structure.
  31 + *  Description:
  32 + *  This function sets up the ip in a usable state.
  33 + *  Return value:
  34 + *  0 on success and an appropriate (-)ve integer as defined in errno.h
  35 + *  file on failure.
  36 + */
  37 +static int stmmac_hw_setup(struct net_device *dev)
  38 +{
  39 +       struct stmmac_priv *priv = netdev_priv(dev);
  40 +       int ret;
  41 +
  42 +       ret = init_dma_desc_rings(dev);
  43 +       if (ret < 0) {
  44 +               pr_err("%s: DMA descriptors initialization failed\n", __func__);
  45 +               return ret;
  46 +       }
  47 +       /* DMA initialization and SW reset */
  48 +       ret = stmmac_init_dma_engine(priv);
  49 +       if (ret < 0) {
  50 +               pr_err("%s: DMA engine initialization failed\n", __func__);
  51 +               return ret;
  52 +       }
  53 +
  54 +       /* Copy the MAC addr into the HW  */
  55 +       priv->hw->mac->set_umac_addr(priv->ioaddr, dev->dev_addr, 0);
  56 +
  57 +       /* If required, perform hw setup of the bus. */
  58 +       if (priv->plat->bus_setup)
  59 +               priv->plat->bus_setup(priv->ioaddr);
  60 +
  61 +       /* Initialize the MAC Core */
  62 +       priv->hw->mac->core_init(priv->ioaddr);
  63 +
  64 +       /* Enable the MAC Rx/Tx */
  65 +       stmmac_set_mac(priv->ioaddr, true);
  66 +
  67 +       /* Set the HW DMA mode and the COE */
  68 +       stmmac_dma_operation_mode(priv);
  69 +
  70 +       stmmac_mmc_setup(priv);
  71 +
  72 +       ret = stmmac_init_ptp(priv);
  73 +       if (ret)
  74 +               pr_warn("%s: failed PTP initialisation\n", __func__);
  75 +
  76 +#ifdef CONFIG_STMMAC_DEBUG_FS
  77 +       ret = stmmac_init_fs(dev);
  78 +       if (ret < 0)
  79 +               pr_warn("%s: failed debugFS registration\n", __func__);
  80 +#endif
  81 +       /* Start the ball rolling... */
  82 +       pr_debug("%s: DMA RX/TX processes started...\n", dev->name);
  83 +       priv->hw->dma->start_tx(priv->ioaddr);
  84 +       priv->hw->dma->start_rx(priv->ioaddr);
  85 +
  86 +       /* Dump DMA/MAC registers */
  87 +       if (netif_msg_hw(priv)) {
  88 +               priv->hw->mac->dump_regs(priv->ioaddr);
  89 +               priv->hw->dma->dump_regs(priv->ioaddr);
  90 +       }
  91 +       priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS;
  92 +
  93 +       priv->eee_enabled = stmmac_eee_init(priv);
  94 +
  95 +       stmmac_init_tx_coalesce(priv);
  96 +
  97 +       if ((priv->use_riwt) && (priv->hw->dma->rx_watchdog)) {
  98 +               priv->rx_riwt = MAX_DMA_RIWT;
  99 +               priv->hw->dma->rx_watchdog(priv->ioaddr, MAX_DMA_RIWT);
 100 +       }
 101 +
 102 +       if (priv->pcs && priv->hw->mac->ctrl_ane)
 103 +               priv->hw->mac->ctrl_ane(priv->ioaddr, 0);
 104 +
 105 +       return 0;
 106 +}
 107 +
 108 +/**
 109   *  stmmac_open - open entry point of the driver
 110   *  @dev : pointer to the device structure.
 111   *  Description:
 112 @@ -1613,6 +1693,10 @@ static int stmmac_open(struct net_device *dev)
 113                 }
 114         }
 115
 116 +       /* Extra statistics */
 117 +       memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
 118 +       priv->xstats.threshold = tc;
 119 +
 120         /* Create and initialize the TX/RX descriptors chains. */
 121         priv->dma_tx_size = STMMAC_ALIGN(dma_txsize);
 122         priv->dma_rx_size = STMMAC_ALIGN(dma_rxsize);
 123 @@ -1624,28 +1708,14 @@ static int stmmac_open(struct net_device *dev)
 124                 goto dma_desc_error;
 125         }
 126
 127 -       ret = init_dma_desc_rings(dev);
 128 +       ret = stmmac_hw_setup(dev);
 129         if (ret < 0) {
 130 -               pr_err("%s: DMA descriptors initialization failed\n", __func__);
 131 -               goto dma_desc_error;
 132 -       }
 133 -
 134 -       /* DMA initialization and SW reset */
 135 -       ret = stmmac_init_dma_engine(priv);
 136 -       if (ret < 0) {
 137 -               pr_err("%s: DMA engine initialization failed\n", __func__);
 138 +               pr_err("%s: Hw setup failed\n", __func__);
 139                 goto init_error;
 140         }
 141
 142 -       /* Copy the MAC addr into the HW  */
 143 -       priv->hw->mac->set_umac_addr(priv->ioaddr, dev->dev_addr, 0);
 144 -
 145 -       /* If required, perform hw setup of the bus. */
 146 -       if (priv->plat->bus_setup)
 147 -               priv->plat->bus_setup(priv->ioaddr);
 148 -
 149 -       /* Initialize the MAC Core */
 150 -       priv->hw->mac->core_init(priv->ioaddr);
 151 +       if (priv->phydev)
 152 +               phy_start(priv->phydev);
 153
 154         /* Request the IRQ lines */
 155         ret = request_irq(dev->irq, stmmac_interrupt,
 156 @@ -1678,55 +1748,6 @@ static int stmmac_open(struct net_device *dev)
 157                 }
 158         }
 159
 160 -       /* Enable the MAC Rx/Tx */
 161 -       stmmac_set_mac(priv->ioaddr, true);
 162 -
 163 -       /* Set the HW DMA mode and the COE */
 164 -       stmmac_dma_operation_mode(priv);
 165 -
 166 -       /* Extra statistics */
 167 -       memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
 168 -       priv->xstats.threshold = tc;
 169 -
 170 -       stmmac_mmc_setup(priv);
 171 -
 172 -       ret = stmmac_init_ptp(priv);
 173 -       if (ret)
 174 -               pr_warn("%s: failed PTP initialisation\n", __func__);
 175 -
 176 -#ifdef CONFIG_STMMAC_DEBUG_FS
 177 -       ret = stmmac_init_fs(dev);
 178 -       if (ret < 0)
 179 -               pr_warn("%s: failed debugFS registration\n", __func__);
 180 -#endif
 181 -       /* Start the ball rolling... */
 182 -       pr_debug("%s: DMA RX/TX processes started...\n", dev->name);
 183 -       priv->hw->dma->start_tx(priv->ioaddr);
 184 -       priv->hw->dma->start_rx(priv->ioaddr);
 185 -
 186 -       /* Dump DMA/MAC registers */
 187 -       if (netif_msg_hw(priv)) {
 188 -               priv->hw->mac->dump_regs(priv->ioaddr);
 189 -               priv->hw->dma->dump_regs(priv->ioaddr);
 190 -       }
 191 -
 192 -       if (priv->phydev)
 193 -               phy_start(priv->phydev);
 194 -
 195 -       priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS;
 196 -
 197 -       priv->eee_enabled = stmmac_eee_init(priv);
 198 -
 199 -       stmmac_init_tx_coalesce(priv);
 200 -
 201 -       if ((priv->use_riwt) && (priv->hw->dma->rx_watchdog)) {
 202 -               priv->rx_riwt = MAX_DMA_RIWT;
 203 -               priv->hw->dma->rx_watchdog(priv->ioaddr, MAX_DMA_RIWT);
 204 -       }
 205 -
 206 -       if (priv->pcs && priv->hw->mac->ctrl_ane)
 207 -               priv->hw->mac->ctrl_ane(priv->ioaddr, 0);
 208 -
 209         napi_enable(&priv->napi);
 210         netif_start_queue(dev);
 211
 212 --
 213 1.8.5.5
 214