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author | Gabor Juhos <juhosg@openwrt.org> | 2012-01-22 22:38:19 +0000 |
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committer | Gabor Juhos <juhosg@openwrt.org> | 2012-01-22 22:38:19 +0000 |
commit | af015f956c35717909247a5732f6862d3de1476f (patch) | |
tree | c72d67ef23e35b8dd3e8177c4811773ed6eed759 /target/linux/ar71xx/files-3.2/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c | |
parent | 386cbfe45bc521baa889a8c261b2c77e69fc956f (diff) | |
download | upstream-af015f956c35717909247a5732f6862d3de1476f.tar.gz upstream-af015f956c35717909247a5732f6862d3de1476f.tar.bz2 upstream-af015f956c35717909247a5732f6862d3de1476f.zip |
ar71xx: add initial support for 3.2
Tested on the following boards:
ALFA AP96
TL-MR3220 v1
TL-WR1043ND v1
TL-WR2543ND v1
TL-WR703N v1
TL-WR741ND v1
TL-WR741ND v4
WNDR3700 v1
WZR-HP-G300NH
SVN-Revision: 29868
Diffstat (limited to 'target/linux/ar71xx/files-3.2/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c')
-rw-r--r-- | target/linux/ar71xx/files-3.2/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files-3.2/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c b/target/linux/ar71xx/files-3.2/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c new file mode 100644 index 0000000000..552c7bfbac --- /dev/null +++ b/target/linux/ar71xx/files-3.2/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c @@ -0,0 +1,246 @@ +/* + * 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) { + pr_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) { + pr_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); +} |