+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Based on Atheros' AG7100 driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include "ag71xx.h"
-
-#define AG71XX_MDIO_RETRY 1000
-#define AG71XX_MDIO_DELAY 5
-
-static inline void ag71xx_mdio_wr(struct ag71xx_mdio *am, unsigned reg,
- u32 value)
-{
- void __iomem *r;
-
- r = am->mdio_base + reg;
- __raw_writel(value, r);
-
- /* flush write */
- (void) __raw_readl(r);
-}
-
-static inline u32 ag71xx_mdio_rr(struct ag71xx_mdio *am, unsigned reg)
-{
- return __raw_readl(am->mdio_base + reg);
-}
-
-static void ag71xx_mdio_dump_regs(struct ag71xx_mdio *am)
-{
- DBG("%s: mii_cfg=%08x, mii_cmd=%08x, mii_addr=%08x\n",
- am->mii_bus->name,
- ag71xx_mdio_rr(am, AG71XX_REG_MII_CFG),
- ag71xx_mdio_rr(am, AG71XX_REG_MII_CMD),
- ag71xx_mdio_rr(am, AG71XX_REG_MII_ADDR));
- DBG("%s: mii_ctrl=%08x, mii_status=%08x, mii_ind=%08x\n",
- am->mii_bus->name,
- ag71xx_mdio_rr(am, AG71XX_REG_MII_CTRL),
- ag71xx_mdio_rr(am, AG71XX_REG_MII_STATUS),
- ag71xx_mdio_rr(am, AG71XX_REG_MII_IND));
-}
-
-int ag71xx_mdio_mii_read(struct ag71xx_mdio *am, int addr, int reg)
-{
- int ret;
- int i;
-
- ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
- ag71xx_mdio_wr(am, AG71XX_REG_MII_ADDR,
- ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
- ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_READ);
-
- i = AG71XX_MDIO_RETRY;
- while (ag71xx_mdio_rr(am, AG71XX_REG_MII_IND) & MII_IND_BUSY) {
- if (i-- == 0) {
- printk(KERN_ERR "%s: mii_read timed out\n",
- am->mii_bus->name);
- ret = 0xffff;
- goto out;
- }
- udelay(AG71XX_MDIO_DELAY);
- }
-
- ret = ag71xx_mdio_rr(am, AG71XX_REG_MII_STATUS) & 0xffff;
- ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
-
- DBG("mii_read: addr=%04x, reg=%04x, value=%04x\n", addr, reg, ret);
-
-out:
- return ret;
-}
-
-void ag71xx_mdio_mii_write(struct ag71xx_mdio *am, int addr, int reg, u16 val)
-{
- int i;
-
- DBG("mii_write: addr=%04x, reg=%04x, value=%04x\n", addr, reg, val);
-
- ag71xx_mdio_wr(am, AG71XX_REG_MII_ADDR,
- ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
- ag71xx_mdio_wr(am, AG71XX_REG_MII_CTRL, val);
-
- i = AG71XX_MDIO_RETRY;
- while (ag71xx_mdio_rr(am, AG71XX_REG_MII_IND) & MII_IND_BUSY) {
- if (i-- == 0) {
- printk(KERN_ERR "%s: mii_write timed out\n",
- am->mii_bus->name);
- break;
- }
- udelay(AG71XX_MDIO_DELAY);
- }
-}
-
-static int ag71xx_mdio_reset(struct mii_bus *bus)
-{
- struct ag71xx_mdio *am = bus->priv;
- u32 t;
-
- if (am->pdata->is_ar7240)
- t = MII_CFG_CLK_DIV_6;
- else
- t = MII_CFG_CLK_DIV_28;
-
- ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, t | MII_CFG_RESET);
- udelay(100);
-
- ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, t);
- udelay(100);
-
- return 0;
-}
-
-static int ag71xx_mdio_read(struct mii_bus *bus, int addr, int reg)
-{
- struct ag71xx_mdio *am = bus->priv;
-
- if (am->pdata->is_ar7240)
- return ar7240sw_phy_read(bus, addr, reg);
- else
- return ag71xx_mdio_mii_read(am, addr, reg);
-}
-
-static int ag71xx_mdio_write(struct mii_bus *bus, int addr, int reg, u16 val)
-{
- struct ag71xx_mdio *am = bus->priv;
-
- if (am->pdata->is_ar7240)
- ar7240sw_phy_write(bus, addr, reg, val);
- else
- ag71xx_mdio_mii_write(am, addr, reg, val);
- return 0;
-}
-
-static int __devinit ag71xx_mdio_probe(struct platform_device *pdev)
-{
- struct ag71xx_mdio_platform_data *pdata;
- struct ag71xx_mdio *am;
- struct resource *res;
- int i;
- int err;
-
- pdata = pdev->dev.platform_data;
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data specified\n");
- return -EINVAL;
- }
-
- am = kzalloc(sizeof(*am), GFP_KERNEL);
- if (!am) {
- err = -ENOMEM;
- goto err_out;
- }
-
- am->pdata = pdata;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no iomem resource found\n");
- err = -ENXIO;
- goto err_out;
- }
-
- am->mdio_base = ioremap_nocache(res->start, res->end - res->start + 1);
- if (!am->mdio_base) {
- dev_err(&pdev->dev, "unable to ioremap registers\n");
- err = -ENOMEM;
- goto err_free_mdio;
- }
-
- am->mii_bus = mdiobus_alloc();
- if (am->mii_bus == NULL) {
- err = -ENOMEM;
- goto err_iounmap;
- }
-
- am->mii_bus->name = "ag71xx_mdio";
- am->mii_bus->read = ag71xx_mdio_read;
- am->mii_bus->write = ag71xx_mdio_write;
- am->mii_bus->reset = ag71xx_mdio_reset;
- am->mii_bus->irq = am->mii_irq;
- am->mii_bus->priv = am;
- am->mii_bus->parent = &pdev->dev;
- snprintf(am->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev_name(&pdev->dev));
- am->mii_bus->phy_mask = pdata->phy_mask;
-
- for (i = 0; i < PHY_MAX_ADDR; i++)
- am->mii_irq[i] = PHY_POLL;
-
- ag71xx_mdio_wr(am, AG71XX_REG_MAC_CFG1, 0);
-
- err = mdiobus_register(am->mii_bus);
- if (err)
- goto err_free_bus;
-
- ag71xx_mdio_dump_regs(am);
-
- platform_set_drvdata(pdev, am);
- return 0;
-
-err_free_bus:
- mdiobus_free(am->mii_bus);
-err_iounmap:
- iounmap(am->mdio_base);
-err_free_mdio:
- kfree(am);
-err_out:
- return err;
-}
-
-static int __devexit ag71xx_mdio_remove(struct platform_device *pdev)
-{
- struct ag71xx_mdio *am = platform_get_drvdata(pdev);
-
- if (am) {
- mdiobus_unregister(am->mii_bus);
- mdiobus_free(am->mii_bus);
- iounmap(am->mdio_base);
- kfree(am);
- platform_set_drvdata(pdev, NULL);
- }
-
- return 0;
-}
-
-static struct platform_driver ag71xx_mdio_driver = {
- .probe = ag71xx_mdio_probe,
- .remove = __exit_p(ag71xx_mdio_remove),
- .driver = {
- .name = "ag71xx-mdio",
- }
-};
-
-int __init ag71xx_mdio_driver_init(void)
-{
- return platform_driver_register(&ag71xx_mdio_driver);
-}
-
-void ag71xx_mdio_driver_exit(void)
-{
- platform_driver_unregister(&ag71xx_mdio_driver);
-}
projects / openwrt / openwrt.git / blobdiff