atl1c: Atheros L1C Gigabit Ethernet driver

Supporting AR8131, and AR8132.

Signed-off-by: Jie Yang <jie.yang@atheros.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 527 insertions, 0 deletions

diff --git a/drivers/net/atl1c/atl1c_hw.c b/drivers/net/atl1c/atl1c_hw.c
new file mode 100644
index 00000000000..3e69b940b8f
--- /dev/null
+++ b/drivers/net/atl1c/atl1c_hw.c
@@ -0,0 +1,527 @@
+/*
+ * Copyright(c) 2007 Atheros Corporation. All rights reserved.
+ *
+ * Derived from Intel e1000 driver
+ * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that 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., 59
+ * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/mii.h>
+#include <linux/crc32.h>
+
+#include "atl1c.h"
+
+/*
+ * check_eeprom_exist
+ * return 1 if eeprom exist
+ */
+int atl1c_check_eeprom_exist(struct atl1c_hw *hw)
+{
+	u32 data;
+
+	AT_READ_REG(hw, REG_TWSI_DEBUG, &data);
+	if (data & TWSI_DEBUG_DEV_EXIST)
+		return 1;
+
+	return 0;
+}
+
+void atl1c_hw_set_mac_addr(struct atl1c_hw *hw)
+{
+	u32 value;
+	/*
+	 * 00-0B-6A-F6-00-DC
+	 * 0:  6AF600DC 1: 000B
+	 * low dword
+	 */
+	value = (((u32)hw->mac_addr[2]) << 24) |
+		(((u32)hw->mac_addr[3]) << 16) |
+		(((u32)hw->mac_addr[4]) << 8)  |
+		(((u32)hw->mac_addr[5])) ;
+	AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 0, value);
+	/* hight dword */
+	value = (((u32)hw->mac_addr[0]) << 8) |
+		(((u32)hw->mac_addr[1])) ;
+	AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 1, value);
+}
+
+/*
+ * atl1c_get_permanent_address
+ * return 0 if get valid mac address,
+ */
+static int atl1c_get_permanent_address(struct atl1c_hw *hw)
+{
+	u32 addr[2];
+	u32 i;
+	u32 otp_ctrl_data;
+	u32 twsi_ctrl_data;
+	u8  eth_addr[ETH_ALEN];
+
+	/* init */
+	addr[0] = addr[1] = 0;
+	AT_READ_REG(hw, REG_OTP_CTRL, &otp_ctrl_data);
+	if (atl1c_check_eeprom_exist(hw)) {
+		/* Enable OTP CLK */
+		if (!(otp_ctrl_data & OTP_CTRL_CLK_EN)) {
+			otp_ctrl_data |= OTP_CTRL_CLK_EN;
+			AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
+			AT_WRITE_FLUSH(hw);
+			msleep(1);
+		}
+
+		AT_READ_REG(hw, REG_TWSI_CTRL, &twsi_ctrl_data);
+		twsi_ctrl_data |= TWSI_CTRL_SW_LDSTART;
+		AT_WRITE_REG(hw, REG_TWSI_CTRL, twsi_ctrl_data);
+		for (i = 0; i < AT_TWSI_EEPROM_TIMEOUT; i++) {
+			msleep(10);
+			AT_READ_REG(hw, REG_TWSI_CTRL, &twsi_ctrl_data);
+			if ((twsi_ctrl_data & TWSI_CTRL_SW_LDSTART) == 0)
+				break;
+		}
+		if (i >= AT_TWSI_EEPROM_TIMEOUT)
+			return -1;
+	}
+	/* Disable OTP_CLK */
+	if (otp_ctrl_data & OTP_CTRL_CLK_EN) {
+		otp_ctrl_data &= ~OTP_CTRL_CLK_EN;
+		AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
+		AT_WRITE_FLUSH(hw);
+		msleep(1);
+	}
+
+	/* maybe MAC-address is from BIOS */
+	AT_READ_REG(hw, REG_MAC_STA_ADDR, &addr[0]);
+	AT_READ_REG(hw, REG_MAC_STA_ADDR + 4, &addr[1]);
+	*(u32 *) &eth_addr[2] = swab32(addr[0]);
+	*(u16 *) &eth_addr[0] = swab16(*(u16 *)&addr[1]);
+
+	if (is_valid_ether_addr(eth_addr)) {
+		memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
+		return 0;
+	}
+
+	return -1;
+}
+
+bool atl1c_read_eeprom(struct atl1c_hw *hw, u32 offset, u32 *p_value)
+{
+	int i;
+	int ret = false;
+	u32 otp_ctrl_data;
+	u32 control;
+	u32 data;
+
+	if (offset & 3)
+		return ret; /* address do not align */
+
+	AT_READ_REG(hw, REG_OTP_CTRL, &otp_ctrl_data);
+	if (!(otp_ctrl_data & OTP_CTRL_CLK_EN))
+		AT_WRITE_REG(hw, REG_OTP_CTRL,
+				(otp_ctrl_data | OTP_CTRL_CLK_EN));
+
+	AT_WRITE_REG(hw, REG_EEPROM_DATA_LO, 0);
+	control = (offset & EEPROM_CTRL_ADDR_MASK) << EEPROM_CTRL_ADDR_SHIFT;
+	AT_WRITE_REG(hw, REG_EEPROM_CTRL, control);
+
+	for (i = 0; i < 10; i++) {
+		udelay(100);
+		AT_READ_REG(hw, REG_EEPROM_CTRL, &control);
+		if (control & EEPROM_CTRL_RW)
+			break;
+	}
+	if (control & EEPROM_CTRL_RW) {
+		AT_READ_REG(hw, REG_EEPROM_CTRL, &data);
+		AT_READ_REG(hw, REG_EEPROM_DATA_LO, p_value);
+		data = data & 0xFFFF;
+		*p_value = swab32((data << 16) | (*p_value >> 16));
+		ret = true;
+	}
+	if (!(otp_ctrl_data & OTP_CTRL_CLK_EN))
+		AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
+
+	return ret;
+}
+/*
+ * Reads the adapter's MAC address from the EEPROM
+ *
+ * hw - Struct containing variables accessed by shared code
+ */
+int atl1c_read_mac_addr(struct atl1c_hw *hw)
+{
+	int err = 0;
+
+	err = atl1c_get_permanent_address(hw);
+	if (err)
+		random_ether_addr(hw->perm_mac_addr);
+
+	memcpy(hw->mac_addr, hw->perm_mac_addr, sizeof(hw->perm_mac_addr));
+	return 0;
+}
+
+/*
+ * atl1c_hash_mc_addr
+ *  purpose
+ *      set hash value for a multicast address
+ *      hash calcu processing :
+ *          1. calcu 32bit CRC for multicast address
+ *          2. reverse crc with MSB to LSB
+ */
+u32 atl1c_hash_mc_addr(struct atl1c_hw *hw, u8 *mc_addr)
+{
+	u32 crc32;
+	u32 value = 0;
+	int i;
+
+	crc32 = ether_crc_le(6, mc_addr);
+	for (i = 0; i < 32; i++)
+		value |= (((crc32 >> i) & 1) << (31 - i));
+
+	return value;
+}
+
+/*
+ * Sets the bit in the multicast table corresponding to the hash value.
+ * hw - Struct containing variables accessed by shared code
+ * hash_value - Multicast address hash value
+ */
+void atl1c_hash_set(struct atl1c_hw *hw, u32 hash_value)
+{
+	u32 hash_bit, hash_reg;
+	u32 mta;
+
+	/*
+	 * The HASH Table  is a register array of 2 32-bit registers.
+	 * It is treated like an array of 64 bits.  We want to set
+	 * bit BitArray[hash_value]. So we figure out what register
+	 * the bit is in, read it, OR in the new bit, then write
+	 * back the new value.  The register is determined by the
+	 * upper bit of the hash value and the bit within that
+	 * register are determined by the lower 5 bits of the value.
+	 */
+	hash_reg = (hash_value >> 31) & 0x1;
+	hash_bit = (hash_value >> 26) & 0x1F;
+
+	mta = AT_READ_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg);
+
+	mta |= (1 << hash_bit);
+
+	AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg, mta);
+}
+
+/*
+ * Reads the value from a PHY register
+ * hw - Struct containing variables accessed by shared code
+ * reg_addr - address of the PHY register to read
+ */
+int atl1c_read_phy_reg(struct atl1c_hw *hw, u16 reg_addr, u16 *phy_data)
+{
+	u32 val;
+	int i;
+
+	val = ((u32)(reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
+		MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW |
+		MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
+
+	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
+
+	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
+		udelay(2);
+		AT_READ_REG(hw, REG_MDIO_CTRL, &val);
+		if (!(val & (MDIO_START | MDIO_BUSY)))
+			break;
+	}
+	if (!(val & (MDIO_START | MDIO_BUSY))) {
+		*phy_data = (u16)val;
+		return 0;
+	}
+
+	return -1;
+}
+
+/*
+ * Writes a value to a PHY register
+ * hw - Struct containing variables accessed by shared code
+ * reg_addr - address of the PHY register to write
+ * data - data to write to the PHY
+ */
+int atl1c_write_phy_reg(struct atl1c_hw *hw, u32 reg_addr, u16 phy_data)
+{
+	int i;
+	u32 val;
+
+	val = ((u32)(phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT   |
+	       (reg_addr & MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
+	       MDIO_SUP_PREAMBLE | MDIO_START |
+	       MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
+
+	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
+
+	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
+		udelay(2);
+		AT_READ_REG(hw, REG_MDIO_CTRL, &val);
+		if (!(val & (MDIO_START | MDIO_BUSY)))
+			break;
+	}
+
+	if (!(val & (MDIO_START | MDIO_BUSY)))
+		return 0;
+
+	return -1;
+}
+
+/*
+ * Configures PHY autoneg and flow control advertisement settings
+ *
+ * hw - Struct containing variables accessed by shared code
+ */
+static int atl1c_phy_setup_adv(struct atl1c_hw *hw)
+{
+	u16 mii_adv_data = ADVERTISE_DEFAULT_CAP & ~ADVERTISE_SPEED_MASK;
+	u16 mii_giga_ctrl_data = GIGA_CR_1000T_DEFAULT_CAP &
+				~GIGA_CR_1000T_SPEED_MASK;
+
+	if (hw->autoneg_advertised & ADVERTISED_10baseT_Half)
+		mii_adv_data |= ADVERTISE_10HALF;
+	if (hw->autoneg_advertised & ADVERTISED_10baseT_Full)
+		mii_adv_data |= ADVERTISE_10FULL;
+	if (hw->autoneg_advertised & ADVERTISED_100baseT_Half)
+		mii_adv_data |= ADVERTISE_100HALF;
+	if (hw->autoneg_advertised & ADVERTISED_100baseT_Full)
+		mii_adv_data |= ADVERTISE_100FULL;
+
+	if (hw->autoneg_advertised & ADVERTISED_Autoneg)
+		mii_adv_data |= ADVERTISE_10HALF  | ADVERTISE_10FULL |
+				ADVERTISE_100HALF | ADVERTISE_100FULL;
+
+	if (hw->ctrl_flags & ATL1C_LINK_CAP_1000M) {
+		if (hw->autoneg_advertised & ADVERTISED_1000baseT_Half)
+			mii_giga_ctrl_data |= ADVERTISE_1000HALF;
+		if (hw->autoneg_advertised & ADVERTISED_1000baseT_Full)
+			mii_giga_ctrl_data |= ADVERTISE_1000FULL;
+		if (hw->autoneg_advertised & ADVERTISED_Autoneg)
+			mii_giga_ctrl_data |= ADVERTISE_1000HALF |
+					ADVERTISE_1000FULL;
+	}
+
+	if (atl1c_write_phy_reg(hw, MII_ADVERTISE, mii_adv_data) != 0 ||
+	    atl1c_write_phy_reg(hw, MII_GIGA_CR, mii_giga_ctrl_data) != 0)
+		return -1;
+	return 0;
+}
+
+void atl1c_phy_disable(struct atl1c_hw *hw)
+{
+	AT_WRITE_REGW(hw, REG_GPHY_CTRL,
+			GPHY_CTRL_PW_WOL_DIS | GPHY_CTRL_EXT_RESET);
+}
+
+static void atl1c_phy_magic_data(struct atl1c_hw *hw)
+{
+	u16 data;
+
+	data = ANA_LOOP_SEL_10BT | ANA_EN_MASK_TB | ANA_EN_10BT_IDLE |
+		((1 & ANA_INTERVAL_SEL_TIMER_MASK) <<
+		ANA_INTERVAL_SEL_TIMER_SHIFT);
+
+	atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_18);
+	atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
+
+	data = (2 & ANA_SERDES_CDR_BW_MASK) | ANA_MS_PAD_DBG |
+		ANA_SERDES_EN_DEEM | ANA_SERDES_SEL_HSP | ANA_SERDES_EN_PLL |
+		ANA_SERDES_EN_LCKDT;
+
+	atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_5);
+	atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
+
+	data = (44 & ANA_LONG_CABLE_TH_100_MASK) |
+		((33 & ANA_SHORT_CABLE_TH_100_MASK) <<
+		ANA_SHORT_CABLE_TH_100_SHIFT) | ANA_BP_BAD_LINK_ACCUM |
+		ANA_BP_SMALL_BW;
+
+	atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_54);
+	atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
+
+	data = (11 & ANA_IECHO_ADJ_MASK) | ((11 & ANA_IECHO_ADJ_MASK) <<
+		ANA_IECHO_ADJ_2_SHIFT) | ((8 & ANA_IECHO_ADJ_MASK) <<
+		ANA_IECHO_ADJ_1_SHIFT) | ((8 & ANA_IECHO_ADJ_MASK) <<
+		ANA_IECHO_ADJ_0_SHIFT);
+
+	atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_4);
+	atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
+
+	data = ANA_RESTART_CAL | ((7 & ANA_MANUL_SWICH_ON_MASK) <<
+		ANA_MANUL_SWICH_ON_SHIFT) | ANA_MAN_ENABLE |
+		ANA_SEL_HSP | ANA_EN_HB | ANA_OEN_125M;
+
+	atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_0);
+	atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
+
+	if (hw->ctrl_flags & ATL1C_HIB_DISABLE) {
+		atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_41);
+		if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &data) != 0)
+			return;
+		data &= ~ANA_TOP_PS_EN;
+		atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
+
+		atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_11);
+		if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &data) != 0)
+			return;
+		data &= ~ANA_PS_HIB_EN;
+		atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
+	}
+}
+
+int atl1c_phy_reset(struct atl1c_hw *hw)
+{
+	struct atl1c_adapter *adapter = hw->adapter;
+	struct pci_dev *pdev = adapter->pdev;
+	u32 phy_ctrl_data = GPHY_CTRL_DEFAULT;
+	u32 mii_ier_data = IER_LINK_UP | IER_LINK_DOWN;
+	int err;
+
+	if (hw->ctrl_flags & ATL1C_HIB_DISABLE)
+		phy_ctrl_data &= ~GPHY_CTRL_HIB_EN;
+
+	AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl_data);
+	AT_WRITE_FLUSH(hw);
+	msleep(40);
+	phy_ctrl_data |= GPHY_CTRL_EXT_RESET;
+	AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl_data);
+	AT_WRITE_FLUSH(hw);
+	msleep(10);
+
+	/*Enable PHY LinkChange Interrupt */
+	err = atl1c_write_phy_reg(hw, MII_IER, mii_ier_data);
+	if (err) {
+		if (netif_msg_hw(adapter))
+			dev_err(&pdev->dev,
+				"Error enable PHY linkChange Interrupt\n");
+		return err;
+	}
+	if (!(hw->ctrl_flags & ATL1C_FPGA_VERSION))
+		atl1c_phy_magic_data(hw);
+	return 0;
+}
+
+int atl1c_phy_init(struct atl1c_hw *hw)
+{
+	struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
+	struct pci_dev *pdev = adapter->pdev;
+	int ret_val;
+	u16 mii_bmcr_data = BMCR_RESET;
+	u16 phy_id1, phy_id2;
+
+	if ((atl1c_read_phy_reg(hw, MII_PHYSID1, &phy_id1) != 0) ||
+		(atl1c_read_phy_reg(hw, MII_PHYSID2, &phy_id2) != 0)) {
+			if (netif_msg_link(adapter))
+				dev_err(&pdev->dev, "Error get phy ID\n");
+		return -1;
+	}
+	switch (hw->media_type) {
+	case MEDIA_TYPE_AUTO_SENSOR:
+		ret_val = atl1c_phy_setup_adv(hw);
+		if (ret_val) {
+			if (netif_msg_link(adapter))
+				dev_err(&pdev->dev,
+					"Error Setting up Auto-Negotiation\n");
+			return ret_val;
+		}
+		mii_bmcr_data |= BMCR_AUTO_NEG_EN | BMCR_RESTART_AUTO_NEG;
+		break;
+	case MEDIA_TYPE_100M_FULL:
+		mii_bmcr_data |= BMCR_SPEED_100 | BMCR_FULL_DUPLEX;
+		break;
+	case MEDIA_TYPE_100M_HALF:
+		mii_bmcr_data |= BMCR_SPEED_100;
+		break;
+	case MEDIA_TYPE_10M_FULL:
+		mii_bmcr_data |= BMCR_SPEED_10 | BMCR_FULL_DUPLEX;
+		break;
+	case MEDIA_TYPE_10M_HALF:
+		mii_bmcr_data |= BMCR_SPEED_10;
+		break;
+	default:
+		if (netif_msg_link(adapter))
+			dev_err(&pdev->dev, "Wrong Media type %d\n",
+				hw->media_type);
+		return -1;
+		break;
+	}
+
+	ret_val = atl1c_write_phy_reg(hw, MII_BMCR, mii_bmcr_data);
+	if (ret_val)
+		return ret_val;
+	hw->phy_configured = true;
+
+	return 0;
+}
+
+/*
+ * Detects the current speed and duplex settings of the hardware.
+ *
+ * hw - Struct containing variables accessed by shared code
+ * speed - Speed of the connection
+ * duplex - Duplex setting of the connection
+ */
+int atl1c_get_speed_and_duplex(struct atl1c_hw *hw, u16 *speed, u16 *duplex)
+{
+	int err;
+	u16 phy_data;
+
+	/* Read   PHY Specific Status Register (17) */
+	err = atl1c_read_phy_reg(hw, MII_GIGA_PSSR, &phy_data);
+	if (err)
+		return err;
+
+	if (!(phy_data & GIGA_PSSR_SPD_DPLX_RESOLVED))
+		return -1;
+
+	switch (phy_data & GIGA_PSSR_SPEED) {
+	case GIGA_PSSR_1000MBS:
+		*speed = SPEED_1000;
+		break;
+	case GIGA_PSSR_100MBS:
+		*speed = SPEED_100;
+		break;
+	case  GIGA_PSSR_10MBS:
+		*speed = SPEED_10;
+		break;
+	default:
+		return -1;
+		break;
+	}
+
+	if (phy_data & GIGA_PSSR_DPLX)
+		*duplex = FULL_DUPLEX;
+	else
+		*duplex = HALF_DUPLEX;
+
+	return 0;
+}
+
+int atl1c_restart_autoneg(struct atl1c_hw *hw)
+{
+	int err = 0;
+	u16 mii_bmcr_data = BMCR_RESET;
+
+	err = atl1c_phy_setup_adv(hw);
+	if (err)
+		return err;
+	mii_bmcr_data |= BMCR_AUTO_NEG_EN | BMCR_RESTART_AUTO_NEG;
+
+	return atl1c_write_phy_reg(hw, MII_BMCR, mii_bmcr_data);
+}