-/*
- * 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 PLL_SEC_CONFIG 0x18050004
-#define PLL_ETH0_INT_CLOCK 0x18050010
-#define PLL_ETH1_INT_CLOCK 0x18050014
-#define PLL_ETH_EXT_CLOCK 0x18050018
-
-#define ag71xx_pll_shift(_ag) (((_ag)->pdev->id) ? 19 : 17)
-#define ag71xx_pll_offset(_ag) (((_ag)->pdev->id) ? PLL_ETH1_INT_CLOCK \
- : PLL_ETH0_INT_CLOCK)
-
-static void ag71xx_set_pll(struct ag71xx *ag, u32 pll_val)
-{
- void __iomem *pll_reg = ioremap_nocache(ag71xx_pll_offset(ag), 4);
- void __iomem *pll_cfg = ioremap_nocache(PLL_SEC_CONFIG, 4);
- u32 s;
- u32 t;
-
- s = ag71xx_pll_shift(ag);
-
- t = __raw_readl(pll_cfg);
- t &= ~(3 << s);
- t |= (2 << s);
- __raw_writel(t, pll_cfg);
- udelay(100);
-
- __raw_writel(pll_val, pll_reg);
-
- t |= (3 << s);
- __raw_writel(t, pll_cfg);
- udelay(100);
-
- t &= ~(3 << s);
- __raw_writel(t, pll_cfg);
- udelay(100);
- DBG("%s: pll_reg %#x: %#x\n", ag->dev->name,
- (unsigned int)pll_reg, __raw_readl(pll_reg));
-
- iounmap(pll_cfg);
- iounmap(pll_reg);
-}
-
-static unsigned char *ag71xx_speed_str(struct ag71xx *ag)
-{
- switch (ag->speed) {
- case SPEED_1000:
- return "1000";
- case SPEED_100:
- return "100";
- case SPEED_10:
- return "10";
- }
-
- return "?";
-}
-
-#if 1
-#define PLL_VAL_1000 0x00110000
-#define PLL_VAL_100 0x00001099
-#define PLL_VAL_10 0x00991099
-#else
-#define PLL_VAL_1000 0x01111000
-#define PLL_VAL_100 0x09991000
-#define PLL_VAL_10 0x09991999
-#endif
-
-static void ag71xx_phy_link_update(struct ag71xx *ag)
-{
- u32 cfg2;
- u32 ifctl;
- u32 pll;
- u32 fifo5;
- u32 mii_speed;
-
- if (!ag->link) {
- netif_carrier_off(ag->dev);
- if (netif_msg_link(ag))
- printk(KERN_INFO "%s: link down\n", ag->dev->name);
- return;
- }
-
- cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
- cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
- cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
-
- ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
- ifctl &= ~(MAC_IFCTL_SPEED);
-
- fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
- fifo5 &= ~FIFO_CFG5_BYTE_PER_CLK;
-
- switch (ag->speed) {
- case SPEED_1000:
- mii_speed = MII_CTRL_SPEED_1000;
- cfg2 |= MAC_CFG2_IF_1000;
- pll = PLL_VAL_1000;
- fifo5 |= FIFO_CFG5_BYTE_PER_CLK;
- break;
- case SPEED_100:
- mii_speed = MII_CTRL_SPEED_100;
- cfg2 |= MAC_CFG2_IF_10_100;
- ifctl |= MAC_IFCTL_SPEED;
- pll = PLL_VAL_100;
- break;
- case SPEED_10:
- mii_speed = MII_CTRL_SPEED_10;
- cfg2 |= MAC_CFG2_IF_10_100;
- pll = PLL_VAL_10;
- break;
- default:
- BUG();
- return;
- }
-
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff);
- ag71xx_set_pll(ag, pll);
- ag71xx_mii_ctrl_set_speed(ag, mii_speed);
-
- ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
- ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
-
- netif_carrier_on(ag->dev);
- if (netif_msg_link(ag))
- printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n",
- ag->dev->name,
- ag71xx_speed_str(ag),
- (DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
-
- DBG("%s: fifo1=%#x, fifo2=%#x, fifo3=%#x, fifo4=%#x, fifo5=%#x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
-
- DBG("%s: mac_cfg2=%#x, ifctl=%#x, mii_ctrl=%#x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
- ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
- ag71xx_mii_ctrl_rr(ag));
-}
-
-static void ag71xx_phy_link_adjust(struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
- struct phy_device *phydev = ag->phy_dev;
- unsigned long flags;
- int status_change = 0;
-
- spin_lock_irqsave(&ag->lock, flags);
-
- if (phydev->link) {
- if (ag->duplex != phydev->duplex
- || ag->speed != phydev->speed) {
- status_change = 1;
- }
- }
-
- if (phydev->link != ag->link) {
- if (phydev->link)
- netif_schedule(dev);
-
- status_change = 1;
- }
-
- ag->link = phydev->link;
- ag->duplex = phydev->duplex;
- ag->speed = phydev->speed;
-
- if (status_change)
- ag71xx_phy_link_update(ag);
-
- spin_unlock_irqrestore(&ag->lock, flags);
-}
-
-void ag71xx_phy_start(struct ag71xx *ag)
-{
- if (ag->phy_dev) {
- phy_start(ag->phy_dev);
- } else {
- struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
-
- ag->duplex = pdata->duplex;
- ag->speed = pdata->speed;
- ag->link = 1;
- ag71xx_phy_link_update(ag);
- }
-}
-
-void ag71xx_phy_stop(struct ag71xx *ag)
-{
- if (ag->phy_dev) {
- phy_stop(ag->phy_dev);
- } else {
- ag->duplex = -1;
- ag->link = 0;
- ag->speed = 0;
- ag71xx_phy_link_update(ag);
- }
-}
-
-int ag71xx_phy_connect(struct ag71xx *ag)
-{
- struct net_device *dev = ag->dev;
- struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
- struct phy_device *phydev = NULL;
- int phy_count = 0;
- int phy_addr;
-
- if (ag->mii_bus && pdata->phy_mask) {
- /* TODO: use mutex of the mdio bus? */
- for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
- if (!(pdata->phy_mask & (1 << phy_addr)))
- continue;
-
- if (ag->mii_bus->phy_map[phy_addr] == NULL)
- continue;
-
- DBG("%s: PHY found at %s, uid=%08x\n",
- dev->name,
- ag->mii_bus->phy_map[phy_addr]->dev.bus_id,
- ag->mii_bus->phy_map[phy_addr]->phy_id);
-
- if (phydev == NULL)
- phydev = ag->mii_bus->phy_map[phy_addr];
-
- phy_count++;
- }
- }
-
- switch (phy_count) {
- case 1:
- ag->phy_dev = phy_connect(dev, phydev->dev.bus_id,
- &ag71xx_phy_link_adjust, 0, pdata->phy_if_mode);
-
- if (IS_ERR(ag->phy_dev)) {
- printk(KERN_ERR "%s: could not connect to PHY at %s\n",
- dev->name, phydev->dev.bus_id);
- return PTR_ERR(ag->phy_dev);
- }
-
- /* mask with MAC supported features */
- phydev->supported &= (SUPPORTED_10baseT_Half
- | SUPPORTED_10baseT_Full
- | SUPPORTED_100baseT_Half
- | SUPPORTED_100baseT_Full
- | SUPPORTED_Autoneg
- | SUPPORTED_MII
- | SUPPORTED_TP);
-
- phydev->advertising = phydev->supported;
-
- printk(KERN_DEBUG "%s: connected to PHY at %s "
- "[uid=%08x, driver=%s]\n",
- dev->name, phydev->dev.bus_id,
- phydev->phy_id, phydev->drv->name);
-
- ag->link = 0;
- ag->speed = 0;
- ag->duplex = -1;
- break;
-
- default:
- switch (pdata->speed) {
- case SPEED_10:
- case SPEED_100:
- case SPEED_1000:
- break;
- default:
- printk(KERN_ERR "%s: invalid speed specified\n",
- dev->name);
- return -EINVAL;
- }
-
- ag->phy_dev = NULL;
- printk(KERN_DEBUG "%s: connected to %d PHYs\n",
- dev->name, phy_count);
- break;
- }
-
- return 0;
-}
-
-void ag71xx_phy_disconnect(struct ag71xx *ag)
-{
- if (ag->phy_dev)
- phy_disconnect(ag->phy_dev);
-}
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