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author | avisconti <armando.visconti@st.com> | 2010-10-25 18:58:14 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-10-28 11:47:54 -0700 |
commit | 19449bfc10d163f0024dd5ae5808e28cda32e7b4 (patch) | |
tree | b32bcc4f66ac12f1a6c94d73a0ada36412cfa8a7 /drivers/net/stmmac | |
parent | d1abc9a9aca06ceb795eb5405264eaafe016ec5c (diff) | |
download | kernel_samsung_espresso10-19449bfc10d163f0024dd5ae5808e28cda32e7b4.zip kernel_samsung_espresso10-19449bfc10d163f0024dd5ae5808e28cda32e7b4.tar.gz kernel_samsung_espresso10-19449bfc10d163f0024dd5ae5808e28cda32e7b4.tar.bz2 |
stmmac: enable/disable rx/tx in the core with a single write.
This patch enables and disables the rx and tx bits in the MAC control reg
by using a single write operation.
This also solves a possible problem (spotted on SPEAr platforms) at 10Mbps
where two consecutive writes to a MAC control register can take more than
4 phy_clk cycles.
Signed-off-by: Armando Visconti <armando.visconti@st.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/stmmac')
-rw-r--r-- | drivers/net/stmmac/stmmac_main.c | 40 |
1 files changed, 10 insertions, 30 deletions
diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c index 823b9e6..06bc603 100644 --- a/drivers/net/stmmac/stmmac_main.c +++ b/drivers/net/stmmac/stmmac_main.c @@ -337,33 +337,19 @@ static int stmmac_init_phy(struct net_device *dev) return 0; } -static inline void stmmac_mac_enable_rx(void __iomem *ioaddr) +static inline void stmmac_enable_mac(void __iomem *ioaddr) { u32 value = readl(ioaddr + MAC_CTRL_REG); - value |= MAC_RNABLE_RX; - /* Set the RE (receive enable bit into the MAC CTRL register). */ - writel(value, ioaddr + MAC_CTRL_REG); -} -static inline void stmmac_mac_enable_tx(void __iomem *ioaddr) -{ - u32 value = readl(ioaddr + MAC_CTRL_REG); - value |= MAC_ENABLE_TX; - /* Set the TE (transmit enable bit into the MAC CTRL register). */ + value |= MAC_RNABLE_RX | MAC_ENABLE_TX; writel(value, ioaddr + MAC_CTRL_REG); } -static inline void stmmac_mac_disable_rx(void __iomem *ioaddr) +static inline void stmmac_disable_mac(void __iomem *ioaddr) { u32 value = readl(ioaddr + MAC_CTRL_REG); - value &= ~MAC_RNABLE_RX; - writel(value, ioaddr + MAC_CTRL_REG); -} -static inline void stmmac_mac_disable_tx(void __iomem *ioaddr) -{ - u32 value = readl(ioaddr + MAC_CTRL_REG); - value &= ~MAC_ENABLE_TX; + value &= ~(MAC_ENABLE_TX | MAC_RNABLE_RX); writel(value, ioaddr + MAC_CTRL_REG); } @@ -857,8 +843,7 @@ static int stmmac_open(struct net_device *dev) writel(0xffffffff, priv->ioaddr + MMC_LOW_INTR_MASK); /* Enable the MAC Rx/Tx */ - stmmac_mac_enable_rx(priv->ioaddr); - stmmac_mac_enable_tx(priv->ioaddr); + stmmac_enable_mac(priv->ioaddr); /* Set the HW DMA mode and the COE */ stmmac_dma_operation_mode(priv); @@ -928,9 +913,8 @@ static int stmmac_release(struct net_device *dev) /* Release and free the Rx/Tx resources */ free_dma_desc_resources(priv); - /* Disable the MAC core */ - stmmac_mac_disable_tx(priv->ioaddr); - stmmac_mac_disable_rx(priv->ioaddr); + /* Disable the MAC Rx/Tx */ + stmmac_disable_mac(priv->ioaddr); netif_carrier_off(dev); @@ -1787,8 +1771,7 @@ static int stmmac_dvr_remove(struct platform_device *pdev) priv->hw->dma->stop_rx(priv->ioaddr); priv->hw->dma->stop_tx(priv->ioaddr); - stmmac_mac_disable_rx(priv->ioaddr); - stmmac_mac_disable_tx(priv->ioaddr); + stmmac_disable_mac(priv->ioaddr); netif_carrier_off(ndev); @@ -1839,13 +1822,11 @@ static int stmmac_suspend(struct platform_device *pdev, pm_message_t state) dis_ic); priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size); - stmmac_mac_disable_tx(priv->ioaddr); - /* Enable Power down mode by programming the PMT regs */ if (device_can_wakeup(priv->device)) priv->hw->mac->pmt(priv->ioaddr, priv->wolopts); else - stmmac_mac_disable_rx(priv->ioaddr); + stmmac_disable_mac(priv->ioaddr); } else { priv->shutdown = 1; /* Although this can appear slightly redundant it actually @@ -1886,8 +1867,7 @@ static int stmmac_resume(struct platform_device *pdev) netif_device_attach(dev); /* Enable the MAC and DMA */ - stmmac_mac_enable_rx(priv->ioaddr); - stmmac_mac_enable_tx(priv->ioaddr); + stmmac_enable_mac(priv->ioaddr); priv->hw->dma->start_tx(priv->ioaddr); priv->hw->dma->start_rx(priv->ioaddr); |