mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-14 12:37:32 +00:00
IXP4xx: Add PHYLIB support to Ethernet driver.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Krzysztof Hałasa
parent
b4c7d3b072
commit
2098c18d6c
2 changed files with 100 additions and 104 deletions
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@ -59,7 +59,7 @@ config EP93XX_ETH
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config IXP4XX_ETH
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tristate "Intel IXP4xx Ethernet support"
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depends on ARM && ARCH_IXP4XX && IXP4XX_NPE && IXP4XX_QMGR
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select MII
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select PHYLIB
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help
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Say Y here if you want to use built-in Ethernet ports
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on IXP4xx processor.
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@ -30,7 +30,7 @@
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#include <linux/etherdevice.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/mii.h>
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#include <linux/phy.h>
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#include <linux/platform_device.h>
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#include <mach/npe.h>
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#include <mach/qmgr.h>
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@ -59,7 +59,6 @@
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#define NAPI_WEIGHT 16
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#define MDIO_INTERVAL (3 * HZ)
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#define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
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#define MAX_MII_RESET_RETRIES 100 /* mdio_read() cycles, typically 4 */
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#define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */
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#define NPE_ID(port_id) ((port_id) >> 4)
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@ -164,14 +163,13 @@ struct port {
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struct npe *npe;
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struct net_device *netdev;
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struct napi_struct napi;
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struct mii_if_info mii;
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struct delayed_work mdio_thread;
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struct phy_device *phydev;
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struct eth_plat_info *plat;
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buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
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struct desc *desc_tab; /* coherent */
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u32 desc_tab_phys;
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int id; /* logical port ID */
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u16 mii_bmcr;
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int speed, duplex;
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};
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/* NPE message structure */
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@ -242,19 +240,20 @@ static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
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static spinlock_t mdio_lock;
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static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
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struct mii_bus *mdio_bus;
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static int ports_open;
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static struct port *npe_port_tab[MAX_NPES];
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static struct dma_pool *dma_pool;
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static u16 mdio_cmd(struct net_device *dev, int phy_id, int location,
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int write, u16 cmd)
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static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
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int write, u16 cmd)
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{
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int cycles = 0;
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if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
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printk(KERN_ERR "%s: MII not ready to transmit\n", dev->name);
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return 0;
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printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
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return -1;
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}
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if (write) {
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@ -273,107 +272,119 @@ static u16 mdio_cmd(struct net_device *dev, int phy_id, int location,
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}
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if (cycles == MAX_MDIO_RETRIES) {
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printk(KERN_ERR "%s: MII write failed\n", dev->name);
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return 0;
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printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
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phy_id);
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return -1;
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}
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#if DEBUG_MDIO
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printk(KERN_DEBUG "%s: mdio_cmd() took %i cycles\n", dev->name,
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cycles);
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printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
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phy_id, write ? "write" : "read", cycles);
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#endif
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if (write)
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return 0;
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if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
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printk(KERN_ERR "%s: MII read failed\n", dev->name);
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return 0;
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#if DEBUG_MDIO
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printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
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phy_id);
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#endif
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return 0xFFFF; /* don't return error */
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}
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return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
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(__raw_readl(&mdio_regs->mdio_status[1]) << 8);
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((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
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}
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static int mdio_read(struct net_device *dev, int phy_id, int location)
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static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
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{
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unsigned long flags;
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u16 val;
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int ret;
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spin_lock_irqsave(&mdio_lock, flags);
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val = mdio_cmd(dev, phy_id, location, 0, 0);
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ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
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spin_unlock_irqrestore(&mdio_lock, flags);
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return val;
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#if DEBUG_MDIO
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printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
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phy_id, location, ret);
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#endif
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return ret;
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}
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static void mdio_write(struct net_device *dev, int phy_id, int location,
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int val)
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static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
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u16 val)
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{
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&mdio_lock, flags);
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mdio_cmd(dev, phy_id, location, 1, val);
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ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
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spin_unlock_irqrestore(&mdio_lock, flags);
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#if DEBUG_MDIO
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printk(KERN_DEBUG "%s #%i: MII read [%i] <- 0x%X, err = %i\n",
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bus->name, phy_id, location, val, ret);
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#endif
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return ret;
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}
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static void phy_reset(struct net_device *dev, int phy_id)
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static int ixp4xx_mdio_register(void)
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{
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int err;
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if (!(mdio_bus = mdiobus_alloc()))
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return -ENOMEM;
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/* All MII PHY accesses use NPE-B Ethernet registers */
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spin_lock_init(&mdio_lock);
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mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
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__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
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mdio_bus->name = "IXP4xx MII Bus";
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mdio_bus->read = &ixp4xx_mdio_read;
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mdio_bus->write = &ixp4xx_mdio_write;
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strcpy(mdio_bus->id, "0");
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if ((err = mdiobus_register(mdio_bus)))
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mdiobus_free(mdio_bus);
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return err;
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}
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static void ixp4xx_mdio_remove(void)
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{
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mdiobus_unregister(mdio_bus);
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mdiobus_free(mdio_bus);
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}
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static void ixp4xx_adjust_link(struct net_device *dev)
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{
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struct port *port = netdev_priv(dev);
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int cycles = 0;
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struct phy_device *phydev = port->phydev;
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mdio_write(dev, phy_id, MII_BMCR, port->mii_bmcr | BMCR_RESET);
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while (cycles < MAX_MII_RESET_RETRIES) {
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if (!(mdio_read(dev, phy_id, MII_BMCR) & BMCR_RESET)) {
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#if DEBUG_MDIO
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printk(KERN_DEBUG "%s: phy_reset() took %i cycles\n",
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dev->name, cycles);
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#endif
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return;
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if (!phydev->link) {
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if (port->speed) {
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port->speed = 0;
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printk(KERN_INFO "%s: link down\n", dev->name);
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}
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udelay(1);
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cycles++;
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return;
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}
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printk(KERN_ERR "%s: MII reset failed\n", dev->name);
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}
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if (port->speed == phydev->speed && port->duplex == phydev->duplex)
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return;
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static void eth_set_duplex(struct port *port)
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{
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if (port->mii.full_duplex)
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port->speed = phydev->speed;
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port->duplex = phydev->duplex;
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if (port->duplex)
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__raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
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&port->regs->tx_control[0]);
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else
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__raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
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&port->regs->tx_control[0]);
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}
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static void phy_check_media(struct port *port, int init)
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{
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if (mii_check_media(&port->mii, 1, init))
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eth_set_duplex(port);
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if (port->mii.force_media) { /* mii_check_media() doesn't work */
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struct net_device *dev = port->netdev;
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int cur_link = mii_link_ok(&port->mii);
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int prev_link = netif_carrier_ok(dev);
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if (!prev_link && cur_link) {
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printk(KERN_INFO "%s: link up\n", dev->name);
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netif_carrier_on(dev);
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} else if (prev_link && !cur_link) {
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printk(KERN_INFO "%s: link down\n", dev->name);
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netif_carrier_off(dev);
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}
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}
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}
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static void mdio_thread(struct work_struct *work)
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{
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struct port *port = container_of(work, struct port, mdio_thread.work);
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phy_check_media(port, 0);
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schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
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printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
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dev->name, port->speed, port->duplex ? "full" : "half");
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}
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@ -777,16 +788,9 @@ static void eth_set_mcast_list(struct net_device *dev)
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static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
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{
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struct port *port = netdev_priv(dev);
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unsigned int duplex_chg;
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int err;
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if (!netif_running(dev))
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return -EINVAL;
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err = generic_mii_ioctl(&port->mii, if_mii(req), cmd, &duplex_chg);
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if (duplex_chg)
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eth_set_duplex(port);
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return err;
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return -EINVAL;
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}
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@ -938,8 +942,6 @@ static int eth_open(struct net_device *dev)
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}
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}
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mdio_write(dev, port->plat->phy, MII_BMCR, port->mii_bmcr);
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memset(&msg, 0, sizeof(msg));
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msg.cmd = NPE_VLAN_SETRXQOSENTRY;
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msg.eth_id = port->id;
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@ -977,6 +979,9 @@ static int eth_open(struct net_device *dev)
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return err;
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}
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port->speed = 0; /* force "link up" message */
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phy_start(port->phydev);
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for (i = 0; i < ETH_ALEN; i++)
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__raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
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__raw_writel(0x08, &port->regs->random_seed);
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@ -1004,10 +1009,8 @@ static int eth_open(struct net_device *dev)
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__raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
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napi_enable(&port->napi);
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phy_check_media(port, 1);
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eth_set_mcast_list(dev);
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netif_start_queue(dev);
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schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
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qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
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eth_rx_irq, dev);
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@ -1098,14 +1101,10 @@ static int eth_close(struct net_device *dev)
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printk(KERN_CRIT "%s: unable to disable loopback\n",
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dev->name);
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port->mii_bmcr = mdio_read(dev, port->plat->phy, MII_BMCR) &
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~(BMCR_RESET | BMCR_PDOWN); /* may have been altered */
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mdio_write(dev, port->plat->phy, MII_BMCR,
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port->mii_bmcr | BMCR_PDOWN);
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phy_stop(port->phydev);
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if (!ports_open)
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qmgr_disable_irq(TXDONE_QUEUE);
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cancel_rearming_delayed_work(&port->mdio_thread);
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destroy_queues(port);
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release_queues(port);
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return 0;
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@ -1117,6 +1116,7 @@ static int __devinit eth_init_one(struct platform_device *pdev)
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struct net_device *dev;
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struct eth_plat_info *plat = pdev->dev.platform_data;
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u32 regs_phys;
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char phy_id[BUS_ID_SIZE];
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int err;
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if (!(dev = alloc_etherdev(sizeof(struct port))))
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@ -1182,22 +1182,19 @@ static int __devinit eth_init_one(struct platform_device *pdev)
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__raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
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udelay(50);
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port->mii.dev = dev;
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port->mii.mdio_read = mdio_read;
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port->mii.mdio_write = mdio_write;
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port->mii.phy_id = plat->phy;
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port->mii.phy_id_mask = 0x1F;
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port->mii.reg_num_mask = 0x1F;
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snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, "0", plat->phy);
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port->phydev = phy_connect(dev, phy_id, &ixp4xx_adjust_link, 0,
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PHY_INTERFACE_MODE_MII);
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if (IS_ERR(port->phydev)) {
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printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
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return PTR_ERR(port->phydev);
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}
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port->phydev->irq = PHY_POLL;
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printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
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npe_name(port->npe));
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phy_reset(dev, plat->phy);
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port->mii_bmcr = mdio_read(dev, plat->phy, MII_BMCR) &
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~(BMCR_RESET | BMCR_PDOWN);
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mdio_write(dev, plat->phy, MII_BMCR, port->mii_bmcr | BMCR_PDOWN);
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INIT_DELAYED_WORK(&port->mdio_thread, mdio_thread);
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return 0;
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err_unreg:
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@ -1231,20 +1228,19 @@ static struct platform_driver ixp4xx_eth_driver = {
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static int __init eth_init_module(void)
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{
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int err;
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if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
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return -ENOSYS;
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/* All MII PHY accesses use NPE-B Ethernet registers */
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spin_lock_init(&mdio_lock);
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mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
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__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
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if ((err = ixp4xx_mdio_register()))
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return err;
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return platform_driver_register(&ixp4xx_eth_driver);
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}
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static void __exit eth_cleanup_module(void)
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{
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platform_driver_unregister(&ixp4xx_eth_driver);
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ixp4xx_mdio_remove();
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}
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MODULE_AUTHOR("Krzysztof Halasa");
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