[ar71xx] ethernet driver updates

* new mii bus code, mac0 and mac1 can use the mac0's miii bus from now on
* swap eth0 & eth1 on RB433/450


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11995 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 226 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_mdio.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_mdio.c
new file mode 100644
index 000000000..b58d3cb55
--- /dev/null
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_mdio.c
@@ -0,0 +1,226 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  Copyright (C) 2008 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
+
+struct ag71xx_mdio *ag71xx_mdio_bus;
+
+static inline void ag71xx_mdio_wr(struct ag71xx_mdio *am, unsigned reg,
+				  u32 value)
+{
+	__raw_writel(value, am->mdio_base + reg - AG71XX_REG_MII_CFG);
+}
+
+static inline u32 ag71xx_mdio_rr(struct ag71xx_mdio *am, unsigned reg)
+{
+	return __raw_readl(am->mdio_base + reg - AG71XX_REG_MII_CFG);
+}
+
+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));
+}
+
+static 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_S) | (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;
+}
+
+static 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_S) | (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;
+
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, MII_CFG_RESET);
+	udelay(100);
+
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, MII_CFG_CLK_DIV_28);
+	udelay(100);
+
+	return 0;
+}
+
+static int ag71xx_mdio_read(struct mii_bus *bus, int addr, int reg)
+{
+	struct ag71xx_mdio *am = bus->priv;
+
+	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;
+
+	ag71xx_mdio_mii_write(am, addr, reg, val);
+	return 0;
+}
+
+static int __init ag71xx_mdio_probe(struct platform_device *pdev)
+{
+	struct ag71xx_mdio_platform_data *pdata;
+	struct ag71xx_mdio *am;
+	struct resource *res;
+	int i;
+	int err;
+
+	if (ag71xx_mdio_bus)
+		return -EBUSY;
+
+	am = kzalloc(sizeof(*am), GFP_KERNEL);
+	if (!am) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	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.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;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
+	am->mii_bus.id = 0;
+#else
+	snprintf(am->mii_bus.id, MII_BUS_ID_SIZE, "%x", 0);
+#endif
+	am->mii_bus.priv = am;
+	am->mii_bus.dev = &pdev->dev;
+
+	pdata = pdev->dev.platform_data;
+	if (pdata)
+		am->mii_bus.phy_mask = pdata->phy_mask;
+
+	for (i = 0; i < PHY_MAX_ADDR; i++)
+		am->mii_irq[i] = PHY_POLL;
+
+	err = mdiobus_register(&am->mii_bus);
+	if (err)
+		goto err_iounmap;
+
+	ag71xx_mdio_dump_regs(am);
+
+	platform_set_drvdata(pdev, am);
+	ag71xx_mdio_bus = am;
+	return 0;
+
+err_iounmap:
+	iounmap(am->mdio_base);
+err_free_mdio:
+	kfree(am);
+err_out:
+	return err;
+}
+
+static int __exit ag71xx_mdio_remove(struct platform_device *pdev)
+{
+	struct ag71xx_mdio *am = platform_get_drvdata(pdev);
+
+	if (am) {
+		ag71xx_mdio_bus = NULL;
+		mdiobus_unregister(&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 ag71xx_mdio_driver_init(void)
+{
+	return platform_driver_register(&ag71xx_mdio_driver);
+}
+
+void ag71xx_mdio_driver_exit(void)
+{
+	platform_driver_unregister(&ag71xx_mdio_driver);
+}