From c2e42c1d07fed146e46ae9b07b721ae0f285e9dd Mon Sep 17 00:00:00 2001
From: florian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Sun, 15 Jul 2012 14:09:18 +0000
Subject: [mcs814x] nuport-mac: add definitions of the various bits/masks used
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32727 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../drivers/net/ethernet/mcs8140/nuport_mac.c | 91 ++++++++++++++++------
1 file changed, 67 insertions(+), 24 deletions(-)
(limited to 'target/linux/mcs814x')
diff --git a/target/linux/mcs814x/files-3.3/drivers/net/ethernet/mcs8140/nuport_mac.c b/target/linux/mcs814x/files-3.3/drivers/net/ethernet/mcs8140/nuport_mac.c
index fc5a5a15a..8254026d2 100644
--- a/target/linux/mcs814x/files-3.3/drivers/net/ethernet/mcs8140/nuport_mac.c
+++ b/target/linux/mcs814x/files-3.3/drivers/net/ethernet/mcs8140/nuport_mac.c
@@ -32,15 +32,30 @@
#define MAC_BASE_ADDR ((priv->mac_base))
#define CTRL_REG (MAC_BASE_ADDR)
-#define MII_BUSY 0x00000001
-#define MII_WRITE 0x00000002
+#define MII_BUSY (1 << 0)
+#define MII_WRITE (1 << 1)
+#define RX_ENABLE (1 << 2)
+#define TX_ENABLE (1 << 3)
+#define DEFER_CHECK (1 << 5)
+#define STRIP_PAD (1 << 8)
+#define DRTRY_DISABLE (1 << 10)
+#define FULL_DUPLEX (1 << 20)
+#define HBD_DISABLE (1 << 28)
#define MAC_ADDR_HIGH_REG (MAC_BASE_ADDR + 0x04)
#define MAC_ADDR_LOW_REG (MAC_BASE_ADDR + 0x08)
#define MII_ADDR_REG (MAC_BASE_ADDR + 0x14)
+#define MII_ADDR_SHIFT (11)
+#define MII_REG_SHIFT (6)
#define MII_DATA_REG (MAC_BASE_ADDR + 0x18)
/* Link interrupt registers */
#define LINK_INT_CSR (MAC_BASE_ADDR + 0xD0)
+#define LINK_INT_EN (1 << 0)
+#define LINK_PHY_ADDR_SHIFT (1)
+#define LINK_PHY_REG_SHIFT (6)
+#define LINK_BIT_UP_SHIFT (11)
+#define LINK_UP (1 << 16)
#define LINK_INT_POLL_TIME (MAC_BASE_ADDR + 0xD4)
+#define LINK_POLL_MASK ((1 << 20) - 1)
#define DMA_CHAN_WIDTH 32
#define DMA_RX_CHAN 0
@@ -53,7 +68,11 @@
#define RX_MAX_BYTES (RX_DMA_BASE + 0x04)
#define RX_ACT_BYTES (RX_DMA_BASE + 0x08)
#define RX_START_DMA (RX_DMA_BASE + 0x0C)
+#define RX_DMA_ENABLE (1 << 0)
+#define RX_DMA_RESET (1 << 1)
+#define RX_DMA_STATUS_FIFO (1 << 12)
#define RX_DMA_ENH (RX_DMA_BASE + 0x14)
+#define RX_DMA_INT_ENABLE (1 << 1)
/* Transmit DMA registers */
#define TX_DMA_BASE ((priv->dma_base) + \
@@ -62,8 +81,19 @@
#define TX_PKT_BYTES (TX_DMA_BASE + 0x04)
#define TX_BYTES_SENT (TX_DMA_BASE + 0x08)
#define TX_START_DMA (TX_DMA_BASE + 0x0C)
+#define TX_DMA_ENABLE (1 << 0)
+#define TX_DMA_START_FRAME (1 << 2)
+#define TX_DMA_END_FRAME (1 << 3)
+#define TX_DMA_PAD_DISABLE (1 << 8)
+#define TX_DMA_CRC_DISABLE (1 << 9)
+#define TX_DMA_FIFO_FULL (1 << 16)
+#define TX_DMA_FIFO_EMPTY (1 << 17)
+#define TX_DMA_STATUS_AVAIL (1 << 18)
+#define TX_DMA_RESET (1 << 24)
#define TX_DMA_STATUS (TX_DMA_BASE + 0x10)
#define TX_DMA_ENH (TX_DMA_BASE + 0x14)
+#define TX_DMA_ENH_ENABLE (1 << 0)
+#define TX_DMA_INT_FIFO (1 << 1)
#define RX_ALLOC_SIZE SZ_2K
#define MAX_ETH_FRAME_SIZE 1536
@@ -170,7 +200,7 @@ static int nuport_mac_mii_read(struct mii_bus *bus,
if (ret)
return ret;
- val |= (mii_id << 11) | (regnum << 6) | MII_BUSY;
+ val |= (mii_id << MII_ADDR_SHIFT) | (regnum << MII_REG_SHIFT) | MII_BUSY;
nuport_mac_writel(val, MII_ADDR_REG);
ret = nuport_mac_mii_busy_wait(priv);
if (ret)
@@ -191,7 +221,8 @@ static int nuport_mac_mii_write(struct mii_bus *bus, int mii_id,
if (ret)
return ret;
- val |= (mii_id << 11) | (regnum << 6) | MII_BUSY | MII_WRITE;
+ val |= (mii_id << MII_ADDR_SHIFT) | (regnum << MII_REG_SHIFT);
+ val |= MII_BUSY | MII_WRITE;
nuport_mac_writel(value, MII_DATA_REG);
nuport_mac_writel(val, MII_ADDR_REG);
@@ -212,7 +243,7 @@ static int nuport_mac_start_tx_dma(struct nuport_mac_priv *priv,
while (timeout--) {
reg = nuport_mac_readl(TX_START_DMA);
- if (!(reg & 0x01)) {
+ if (!(reg & TX_DMA_ENABLE)) {
netdev_dbg(priv->dev, "dma ready\n");
break;
}
@@ -226,11 +257,12 @@ static int nuport_mac_start_tx_dma(struct nuport_mac_priv *priv,
skb->len, DMA_TO_DEVICE);
/* enable enhanced mode */
- nuport_mac_writel(0x01, TX_DMA_ENH);
+ nuport_mac_writel(TX_DMA_ENH_ENABLE, TX_DMA_ENH);
nuport_mac_writel(p, TX_BUFFER_ADDR);
nuport_mac_writel((skb->len) - 1, TX_PKT_BYTES);
wmb();
- nuport_mac_writel(0x0D, TX_START_DMA);
+ reg = TX_DMA_ENABLE | TX_DMA_START_FRAME | TX_DMA_END_FRAME;
+ nuport_mac_writel(reg, TX_START_DMA);
return 0;
}
@@ -240,7 +272,7 @@ static void nuport_mac_reset_tx_dma(struct nuport_mac_priv *priv)
u32 reg;
reg = nuport_mac_readl(TX_START_DMA);
- reg |= (1 << 24);
+ reg |= TX_DMA_RESET;
nuport_mac_writel(reg, TX_START_DMA);
}
@@ -253,7 +285,7 @@ static int nuport_mac_start_rx_dma(struct nuport_mac_priv *priv,
while (timeout--) {
reg = nuport_mac_readl(RX_START_DMA);
- if (!(reg & 0x01)) {
+ if (!(reg & RX_DMA_ENABLE)) {
netdev_dbg(priv->dev, "dma ready\n");
break;
}
@@ -268,7 +300,7 @@ static int nuport_mac_start_rx_dma(struct nuport_mac_priv *priv,
nuport_mac_writel(p, RX_BUFFER_ADDR);
wmb();
- nuport_mac_writel(0x01, RX_START_DMA);
+ nuport_mac_writel(RX_DMA_ENABLE, RX_START_DMA);
return 0;
}
@@ -278,7 +310,7 @@ static void nuport_mac_reset_rx_dma(struct nuport_mac_priv *priv)
u32 reg;
reg = nuport_mac_readl(RX_START_DMA);
- reg |= (1 << 1);
+ reg |= RX_DMA_RESET;
nuport_mac_writel(reg, RX_START_DMA);
}
@@ -288,7 +320,7 @@ static void nuport_mac_disable_rx_dma(struct nuport_mac_priv *priv)
u32 reg;
reg = nuport_mac_readl(RX_DMA_ENH);
- reg &= ~(1 << 1);
+ reg &= ~RX_DMA_INT_ENABLE;
nuport_mac_writel(reg, RX_DMA_ENH);
}
@@ -297,7 +329,7 @@ static void nuport_mac_enable_rx_dma(struct nuport_mac_priv *priv)
u32 reg;
reg = nuport_mac_readl(RX_DMA_ENH);
- reg |= (1 << 1);
+ reg |= RX_DMA_INT_ENABLE;
nuport_mac_writel(reg, RX_DMA_ENH);
}
@@ -363,9 +395,9 @@ static void nuport_mac_adjust_link(struct net_device *dev)
if (phydev->link & (priv->old_duplex != phydev->duplex)) {
reg = nuport_mac_readl(CTRL_REG);
if (phydev->duplex == DUPLEX_FULL)
- reg |= (1 << 20);
+ reg |= DUPLEX_FULL;
else
- reg &= ~(1 << 20);
+ reg &= ~DUPLEX_FULL;
nuport_mac_writel(reg, CTRL_REG);
status_changed = 1;
@@ -392,14 +424,14 @@ static irqreturn_t nuport_mac_link_interrupt(int irq, void *dev_id)
u8 phy_addr;
reg = nuport_mac_readl(LINK_INT_CSR);
- phy_addr = (reg >> 1) & 0x0f;
+ phy_addr = (reg >> LINK_PHY_ADDR_SHIFT) & (PHY_MAX_ADDR - 1);
if (phy_addr != priv->phydev->addr) {
netdev_err(dev, "spurious PHY irq (phy: %d)\n", phy_addr);
return IRQ_NONE;
}
- priv->phydev->link = (reg & (1 << 16));
+ priv->phydev->link = (reg & LINK_UP);
nuport_mac_adjust_link(dev);
return IRQ_HANDLED;
@@ -417,7 +449,7 @@ static irqreturn_t nuport_mac_tx_interrupt(int irq, void *dev_id)
spin_lock_irqsave(&priv->lock, flags);
/* clear status word available if ready */
reg = nuport_mac_readl(TX_START_DMA);
- if (reg & (1 << 18)) {
+ if (reg & TX_DMA_STATUS_AVAIL) {
nuport_mac_writel(reg, TX_START_DMA);
reg = nuport_mac_readl(TX_DMA_STATUS);
@@ -690,6 +722,7 @@ static int nuport_mac_open(struct net_device *dev)
int ret;
struct nuport_mac_priv *priv = netdev_priv(dev);
unsigned long flags;
+ u32 reg = 0;
ret = clk_enable(priv->emac_clk);
if (ret) {
@@ -698,7 +731,10 @@ static int nuport_mac_open(struct net_device *dev)
}
/* Set MAC into full duplex mode by default */
- nuport_mac_writel(0x1010052C, CTRL_REG);
+ reg |= RX_ENABLE | TX_ENABLE;
+ reg |= DEFER_CHECK | STRIP_PAD | DRTRY_DISABLE;
+ reg |= FULL_DUPLEX | HBD_DISABLE;
+ nuport_mac_writel(reg, CTRL_REG);
/* set mac address in hardware in case it was not already */
nuport_mac_change_mac_address(dev, dev->dev_addr);
@@ -712,10 +748,16 @@ static int nuport_mac_open(struct net_device *dev)
phy_start(priv->phydev);
- /* Enable link interrupt monitoring */
+ /* Enable link interrupt monitoring for our PHY address */
+ reg = LINK_INT_EN | (priv->phydev->addr << LINK_PHY_ADDR_SHIFT);
+ /* MII_BMSR register to be watched */
+ reg |= (1 << LINK_PHY_REG_SHIFT);
+ /* BMSR_STATUS to be watched in particular */
+ reg |= (2 << LINK_BIT_UP_SHIFT);
+
spin_lock_irqsave(&priv->lock, flags);
- nuport_mac_writel(0x1041 | (priv->phydev->addr << 1), LINK_INT_CSR);
- nuport_mac_writel(0xFFFFF, LINK_INT_POLL_TIME);
+ nuport_mac_writel(reg, LINK_INT_CSR);
+ nuport_mac_writel(LINK_POLL_MASK, LINK_INT_POLL_TIME);
spin_unlock_irqrestore(&priv->lock, flags);
ret = request_irq(priv->tx_irq, &nuport_mac_tx_interrupt,
@@ -771,8 +813,9 @@ static int nuport_mac_close(struct net_device *dev)
netif_stop_queue(dev);
free_irq(priv->link_irq, dev);
- nuport_mac_writel(0x00, LINK_INT_CSR);
- nuport_mac_writel(0x00, LINK_INT_POLL_TIME);
+ /* disable PHY polling */
+ nuport_mac_writel(0, LINK_INT_CSR);
+ nuport_mac_writel(0, LINK_INT_POLL_TIME);
phy_stop(priv->phydev);
free_irq(priv->tx_irq, dev);
--
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