From 0f0e42f28e785d2521f7003b981ab573c45f0a6c Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Sun, 15 Jul 2012 14:09:18 +0000 Subject: [PATCH] nuport-mac: add definitions of the various bits/masks used SVN-Revision: 32727 --- .../drivers/net/ethernet/mcs8140/nuport_mac.c | 91 ++++++++++++++----- 1 file changed, 67 insertions(+), 24 deletions(-) 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 fc5a5a15a2..8254026d22 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); -- 2.30.2