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path: root/drivers/net/stmmac/stmmac_mdio.c
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Diffstat (limited to 'drivers/net/stmmac/stmmac_mdio.c')
-rw-r--r--drivers/net/stmmac/stmmac_mdio.c215
1 files changed, 0 insertions, 215 deletions
diff --git a/drivers/net/stmmac/stmmac_mdio.c b/drivers/net/stmmac/stmmac_mdio.c
deleted file mode 100644
index 234b4068a1f..00000000000
--- a/drivers/net/stmmac/stmmac_mdio.c
+++ /dev/null
@@ -1,215 +0,0 @@
-/*******************************************************************************
- STMMAC Ethernet Driver -- MDIO bus implementation
- Provides Bus interface for MII registers
-
- Copyright (C) 2007-2009 STMicroelectronics Ltd
-
- This program is free software; you can redistribute it and/or modify it
- under the terms and conditions of the GNU General Public License,
- version 2, as published by the Free Software Foundation.
-
- This program is distributed in the hope it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- more details.
-
- You should have received a copy of the GNU General Public License along with
- this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
-
- The full GNU General Public License is included in this distribution in
- the file called "COPYING".
-
- Author: Carl Shaw <carl.shaw@st.com>
- Maintainer: Giuseppe Cavallaro <peppe.cavallaro@st.com>
-*******************************************************************************/
-
-#include <linux/mii.h>
-#include <linux/phy.h>
-#include <linux/slab.h>
-
-#include "stmmac.h"
-
-#define MII_BUSY 0x00000001
-#define MII_WRITE 0x00000002
-
-/**
- * stmmac_mdio_read
- * @bus: points to the mii_bus structure
- * @phyaddr: MII addr reg bits 15-11
- * @phyreg: MII addr reg bits 10-6
- * Description: it reads data from the MII register from within the phy device.
- * For the 7111 GMAC, we must set the bit 0 in the MII address register while
- * accessing the PHY registers.
- * Fortunately, it seems this has no drawback for the 7109 MAC.
- */
-static int stmmac_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)
-{
- struct net_device *ndev = bus->priv;
- struct stmmac_priv *priv = netdev_priv(ndev);
- unsigned int mii_address = priv->hw->mii.addr;
- unsigned int mii_data = priv->hw->mii.data;
-
- int data;
- u16 regValue = (((phyaddr << 11) & (0x0000F800)) |
- ((phyreg << 6) & (0x000007C0)));
- regValue |= MII_BUSY | ((priv->plat->clk_csr & 7) << 2);
-
- do {} while (((readl(priv->ioaddr + mii_address)) & MII_BUSY) == 1);
- writel(regValue, priv->ioaddr + mii_address);
- do {} while (((readl(priv->ioaddr + mii_address)) & MII_BUSY) == 1);
-
- /* Read the data from the MII data register */
- data = (int)readl(priv->ioaddr + mii_data);
-
- return data;
-}
-
-/**
- * stmmac_mdio_write
- * @bus: points to the mii_bus structure
- * @phyaddr: MII addr reg bits 15-11
- * @phyreg: MII addr reg bits 10-6
- * @phydata: phy data
- * Description: it writes the data into the MII register from within the device.
- */
-static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,
- u16 phydata)
-{
- struct net_device *ndev = bus->priv;
- struct stmmac_priv *priv = netdev_priv(ndev);
- unsigned int mii_address = priv->hw->mii.addr;
- unsigned int mii_data = priv->hw->mii.data;
-
- u16 value =
- (((phyaddr << 11) & (0x0000F800)) | ((phyreg << 6) & (0x000007C0)))
- | MII_WRITE;
-
- value |= MII_BUSY | ((priv->plat->clk_csr & 7) << 2);
-
-
- /* Wait until any existing MII operation is complete */
- do {} while (((readl(priv->ioaddr + mii_address)) & MII_BUSY) == 1);
-
- /* Set the MII address register to write */
- writel(phydata, priv->ioaddr + mii_data);
- writel(value, priv->ioaddr + mii_address);
-
- /* Wait until any existing MII operation is complete */
- do {} while (((readl(priv->ioaddr + mii_address)) & MII_BUSY) == 1);
-
- return 0;
-}
-
-/**
- * stmmac_mdio_reset
- * @bus: points to the mii_bus structure
- * Description: reset the MII bus
- */
-static int stmmac_mdio_reset(struct mii_bus *bus)
-{
- struct net_device *ndev = bus->priv;
- struct stmmac_priv *priv = netdev_priv(ndev);
- unsigned int mii_address = priv->hw->mii.addr;
-
- if (priv->phy_reset) {
- pr_debug("stmmac_mdio_reset: calling phy_reset\n");
- priv->phy_reset(priv->plat->bsp_priv);
- }
-
- /* This is a workaround for problems with the STE101P PHY.
- * It doesn't complete its reset until at least one clock cycle
- * on MDC, so perform a dummy mdio read.
- */
- writel(0, priv->ioaddr + mii_address);
-
- return 0;
-}
-
-/**
- * stmmac_mdio_register
- * @ndev: net device structure
- * Description: it registers the MII bus
- */
-int stmmac_mdio_register(struct net_device *ndev)
-{
- int err = 0;
- struct mii_bus *new_bus;
- int *irqlist;
- struct stmmac_priv *priv = netdev_priv(ndev);
- int addr, found;
-
- new_bus = mdiobus_alloc();
- if (new_bus == NULL)
- return -ENOMEM;
-
- irqlist = kzalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
- if (irqlist == NULL) {
- err = -ENOMEM;
- goto irqlist_alloc_fail;
- }
-
- /* Assign IRQ to phy at address phy_addr */
- if (priv->phy_addr != -1)
- irqlist[priv->phy_addr] = priv->phy_irq;
-
- new_bus->name = "STMMAC MII Bus";
- new_bus->read = &stmmac_mdio_read;
- new_bus->write = &stmmac_mdio_write;
- new_bus->reset = &stmmac_mdio_reset;
- snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", priv->plat->bus_id);
- new_bus->priv = ndev;
- new_bus->irq = irqlist;
- new_bus->phy_mask = priv->phy_mask;
- new_bus->parent = priv->device;
- err = mdiobus_register(new_bus);
- if (err != 0) {
- pr_err("%s: Cannot register as MDIO bus\n", new_bus->name);
- goto bus_register_fail;
- }
-
- priv->mii = new_bus;
-
- found = 0;
- for (addr = 0; addr < 32; addr++) {
- struct phy_device *phydev = new_bus->phy_map[addr];
- if (phydev) {
- if (priv->phy_addr == -1) {
- priv->phy_addr = addr;
- phydev->irq = priv->phy_irq;
- irqlist[addr] = priv->phy_irq;
- }
- pr_info("%s: PHY ID %08x at %d IRQ %d (%s)%s\n",
- ndev->name, phydev->phy_id, addr,
- phydev->irq, dev_name(&phydev->dev),
- (addr == priv->phy_addr) ? " active" : "");
- found = 1;
- }
- }
-
- if (!found)
- pr_warning("%s: No PHY found\n", ndev->name);
-
- return 0;
-bus_register_fail:
- kfree(irqlist);
-irqlist_alloc_fail:
- kfree(new_bus);
- return err;
-}
-
-/**
- * stmmac_mdio_unregister
- * @ndev: net device structure
- * Description: it unregisters the MII bus
- */
-int stmmac_mdio_unregister(struct net_device *ndev)
-{
- struct stmmac_priv *priv = netdev_priv(ndev);
-
- mdiobus_unregister(priv->mii);
- priv->mii->priv = NULL;
- kfree(priv->mii);
-
- return 0;
-}
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