// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright ( c ) 2007 Atheros Corporation . All rights reserved .
*
* Derived from Intel e1000 driver
* Copyright ( c ) 1999 - 2005 Intel Corporation . All rights reserved .
*/
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/mii.h>
#include <linux/crc32.h>
#include "atl1e.h"
/*
* check_eeprom_exist
* return 0 if eeprom exist
*/
int atl1e_check_eeprom_exist(struct atl1e_hw *hw)
{
u32 value;
value = AT_READ_REG(hw, REG_SPI_FLASH_CTRL);
if (value & SPI_FLASH_CTRL_EN_VPD) {
value &= ~SPI_FLASH_CTRL_EN_VPD;
AT_WRITE_REG(hw, REG_SPI_FLASH_CTRL, value);
}
value = AT_READ_REGW(hw, REG_PCIE_CAP_LIST);
return ((value & 0 xFF00) == 0 x6C00) ? 0 : 1 ;
}
void atl1e_hw_set_mac_addr(struct atl1e_hw *hw)
{
u32 value;
/*
* 00 - 0 B - 6 A - F6 - 00 - DC
* 0 : 6 AF600DC 1 : 000 B
* 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);
}
/*
* atl1e_get_permanent_address
* return 0 if get valid mac address ,
*/
static int atl1e_get_permanent_address(struct atl1e_hw *hw)
{
u32 addr[2 ];
u32 i;
u32 twsi_ctrl_data;
u8 eth_addr[ETH_ALEN];
if (is_valid_ether_addr(hw->perm_mac_addr))
return 0 ;
/* init */
addr[0 ] = addr[1 ] = 0 ;
if (!atl1e_check_eeprom_exist(hw)) {
/* eeprom exist */
twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
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 );
twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
if ((twsi_ctrl_data & TWSI_CTRL_SW_LDSTART) == 0 )
break ;
}
if (i >= AT_TWSI_EEPROM_TIMEOUT)
return AT_ERR_TIMEOUT;
}
/* maybe MAC-address is from BIOS */
addr[0 ] = AT_READ_REG(hw, REG_MAC_STA_ADDR);
addr[1 ] = AT_READ_REG(hw, REG_MAC_STA_ADDR + 4 );
*(u32 *) ð_addr[2 ] = swab32(addr[0 ]);
*(u16 *) ð_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 AT_ERR_EEPROM;
}
bool atl1e_write_eeprom(struct atl1e_hw *hw, u32 offset, u32 value)
{
return true ;
}
bool atl1e_read_eeprom(struct atl1e_hw *hw, u32 offset, u32 *p_value)
{
int i;
u32 control;
if (offset & 3 )
return false ; /* address do not align */
AT_WRITE_REG(hw, REG_VPD_DATA, 0 );
control = (offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
AT_WRITE_REG(hw, REG_VPD_CAP, control);
for (i = 0 ; i < 10 ; i++) {
msleep(2 );
control = AT_READ_REG(hw, REG_VPD_CAP);
if (control & VPD_CAP_VPD_FLAG)
break ;
}
if (control & VPD_CAP_VPD_FLAG) {
*p_value = AT_READ_REG(hw, REG_VPD_DATA);
return true ;
}
return false ; /* timeout */
}
void atl1e_force_ps(struct atl1e_hw *hw)
{
AT_WRITE_REGW(hw, REG_GPHY_CTRL,
GPHY_CTRL_PW_WOL_DIS | GPHY_CTRL_EXT_RESET);
}
/*
* Reads the adapter ' s MAC address from the EEPROM
*
* hw - Struct containing variables accessed by shared code
*/
int atl1e_read_mac_addr(struct atl1e_hw *hw)
{
int err = 0 ;
err = atl1e_get_permanent_address(hw);
if (err)
return AT_ERR_EEPROM;
memcpy(hw->mac_addr, hw->perm_mac_addr, sizeof (hw->perm_mac_addr));
return 0 ;
}
/*
* atl1e_hash_mc_addr
* purpose
* set hash value for a multicast address
*/
u32 atl1e_hash_mc_addr(struct atl1e_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 atl1e_hash_set(struct atl1e_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 7 bits 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 ) & 0 x1;
hash_bit = (hash_value >> 26 ) & 0 x1F;
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 atl1e_read_phy_reg(struct atl1e_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);
wmb();
for (i = 0 ; i < MDIO_WAIT_TIMES; i++) {
udelay(2 );
val = AT_READ_REG(hw, REG_MDIO_CTRL);
if (!(val & (MDIO_START | MDIO_BUSY)))
break ;
wmb();
}
if (!(val & (MDIO_START | MDIO_BUSY))) {
*phy_data = (u16)val;
return 0 ;
}
return AT_ERR_PHY;
}
/*
* 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 atl1e_write_phy_reg(struct atl1e_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);
wmb();
for (i = 0 ; i < MDIO_WAIT_TIMES; i++) {
udelay(2 );
val = AT_READ_REG(hw, REG_MDIO_CTRL);
if (!(val & (MDIO_START | MDIO_BUSY)))
break ;
wmb();
}
if (!(val & (MDIO_START | MDIO_BUSY)))
return 0 ;
return AT_ERR_PHY;
}
/*
* atl1e_init_pcie - init PCIE module
*/
static void atl1e_init_pcie(struct atl1e_hw *hw)
{
u32 value;
/* comment 2lines below to save more power when sususpend
value = LTSSM_TEST_MODE_DEF ;
AT_WRITE_REG ( hw , REG_LTSSM_TEST_MODE , value ) ;
*/
/* pcie flow control mode change */
value = AT_READ_REG(hw, 0 x1008);
value |= 0 x8000;
AT_WRITE_REG(hw, 0 x1008, value);
}
/*
* Configures PHY autoneg and flow control advertisement settings
*
* hw - Struct containing variables accessed by shared code
*/
static int atl1e_phy_setup_autoneg_adv(struct atl1e_hw *hw)
{
s32 ret_val;
u16 mii_autoneg_adv_reg;
u16 mii_1000t_ctrl_reg;
if (0 != hw->mii_autoneg_adv_reg)
return 0 ;
/* Read the MII Auto-Neg Advertisement Register (Address 4/9). */
mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;
mii_1000t_ctrl_reg = MII_AT001_CR_1000T_DEFAULT_CAP_MASK;
/*
* Need to parse autoneg_advertised and set up
* the appropriate PHY registers . First we will parse for
* autoneg_advertised software override . Since we can advertise
* a plethora of combinations , we need to check each bit
* individually .
*/
/*
* First we clear all the 10 / 100 mb speed bits in the Auto - Neg
* Advertisement Register ( Address 4 ) and the 1000 mb speed bits in
* the 1000 Base - T control Register ( Address 9 ) .
*/
mii_autoneg_adv_reg &= ~ADVERTISE_ALL;
mii_1000t_ctrl_reg &= ~MII_AT001_CR_1000T_SPEED_MASK;
/*
* Need to parse MediaType and setup the
* appropriate PHY registers .
*/
switch (hw->media_type) {
case MEDIA_TYPE_AUTO_SENSOR:
mii_autoneg_adv_reg |= ADVERTISE_ALL;
hw->autoneg_advertised = ADVERTISE_ALL;
if (hw->nic_type == athr_l1e) {
mii_1000t_ctrl_reg |= ADVERTISE_1000FULL;
hw->autoneg_advertised |= ADVERTISE_1000_FULL;
}
break ;
case MEDIA_TYPE_100M_FULL:
mii_autoneg_adv_reg |= ADVERTISE_100FULL;
hw->autoneg_advertised = ADVERTISE_100_FULL;
break ;
case MEDIA_TYPE_100M_HALF:
mii_autoneg_adv_reg |= ADVERTISE_100_HALF;
hw->autoneg_advertised = ADVERTISE_100_HALF;
break ;
case MEDIA_TYPE_10M_FULL:
mii_autoneg_adv_reg |= ADVERTISE_10_FULL;
hw->autoneg_advertised = ADVERTISE_10_FULL;
break ;
default :
mii_autoneg_adv_reg |= ADVERTISE_10_HALF;
hw->autoneg_advertised = ADVERTISE_10_HALF;
break ;
}
/* flow control fixed to enable all */
mii_autoneg_adv_reg |= (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
hw->mii_1000t_ctrl_reg = mii_1000t_ctrl_reg;
ret_val = atl1e_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
if (ret_val)
return ret_val;
if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
ret_val = atl1e_write_phy_reg(hw, MII_CTRL1000,
mii_1000t_ctrl_reg);
if (ret_val)
return ret_val;
}
return 0 ;
}
/*
* Resets the PHY and make all config validate
*
* hw - Struct containing variables accessed by shared code
*
* Sets bit 15 and 12 of the MII control regiser ( for F001 bug )
*/
int atl1e_phy_commit(struct atl1e_hw *hw)
{
struct atl1e_adapter *adapter = hw->adapter;
int ret_val;
u16 phy_data;
phy_data = BMCR_RESET | BMCR_ANENABLE | BMCR_ANRESTART;
ret_val = atl1e_write_phy_reg(hw, MII_BMCR, phy_data);
if (ret_val) {
u32 val;
int i;
/**************************************
* pcie serdes link may be down !
**************************************/
for (i = 0 ; i < 25 ; i++) {
msleep(1 );
val = AT_READ_REG(hw, REG_MDIO_CTRL);
if (!(val & (MDIO_START | MDIO_BUSY)))
break ;
}
if (0 != (val & (MDIO_START | MDIO_BUSY))) {
netdev_err(adapter->netdev,
"pcie linkdown at least for 25ms\n" );
return ret_val;
}
netdev_err(adapter->netdev, "pcie linkup after %d ms\n" , i);
}
return 0 ;
}
int atl1e_phy_init(struct atl1e_hw *hw)
{
struct atl1e_adapter *adapter = hw->adapter;
s32 ret_val;
u16 phy_val;
if (hw->phy_configured) {
if (hw->re_autoneg) {
hw->re_autoneg = false ;
return atl1e_restart_autoneg(hw);
}
return 0 ;
}
/* RESET GPHY Core */
AT_WRITE_REGW(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
msleep(2 );
AT_WRITE_REGW(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
GPHY_CTRL_EXT_RESET);
msleep(2 );
/* patches */
/* p1. eable hibernation mode */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0 xB);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0 xBC00);
if (ret_val)
return ret_val;
/* p2. set Class A/B for all modes */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0 );
if (ret_val)
return ret_val;
phy_val = 0 x02ef;
/* remove Class AB */
/* phy_val = hw->emi_ca ? 0x02ef : 0x02df; */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, phy_val);
if (ret_val)
return ret_val;
/* p3. 10B ??? */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0 x12);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0 x4C04);
if (ret_val)
return ret_val;
/* p4. 1000T power */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0 x4);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0 x8BBB);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0 x5);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0 x2C46);
if (ret_val)
return ret_val;
msleep(1 );
/*Enable PHY LinkChange Interrupt */
ret_val = atl1e_write_phy_reg(hw, MII_INT_CTRL, 0 xC00);
if (ret_val) {
netdev_err(adapter->netdev,
"Error enable PHY linkChange Interrupt\n" );
return ret_val;
}
/* setup AutoNeg parameters */
ret_val = atl1e_phy_setup_autoneg_adv(hw);
if (ret_val) {
netdev_err(adapter->netdev,
"Error Setting up Auto-Negotiation\n" );
return ret_val;
}
/* SW.Reset & En-Auto-Neg to restart Auto-Neg*/
netdev_dbg(adapter->netdev, "Restarting Auto-Negotiation\n" );
ret_val = atl1e_phy_commit(hw);
if (ret_val) {
netdev_err(adapter->netdev, "Error resetting the phy\n" );
return ret_val;
}
hw->phy_configured = true ;
return 0 ;
}
/*
* Reset the transmit and receive units ; mask and clear all interrupts .
* hw - Struct containing variables accessed by shared code
* return : 0 or idle status ( if error )
*/
int atl1e_reset_hw(struct atl1e_hw *hw)
{
struct atl1e_adapter *adapter = hw->adapter;
struct pci_dev *pdev = adapter->pdev;
u32 idle_status_data = 0 ;
u16 pci_cfg_cmd_word = 0 ;
int timeout = 0 ;
/* Workaround for PCI problem when BIOS sets MMRBC incorrectly. */
pci_read_config_word(pdev, PCI_REG_COMMAND, &pci_cfg_cmd_word);
if ((pci_cfg_cmd_word & (CMD_IO_SPACE |
CMD_MEMORY_SPACE | CMD_BUS_MASTER))
!= (CMD_IO_SPACE | CMD_MEMORY_SPACE | CMD_BUS_MASTER)) {
pci_cfg_cmd_word |= (CMD_IO_SPACE |
CMD_MEMORY_SPACE | CMD_BUS_MASTER);
pci_write_config_word(pdev, PCI_REG_COMMAND, pci_cfg_cmd_word);
}
/*
* Issue Soft Reset to the MAC . This will reset the chip ' s
* transmit , receive , DMA . It will not effect
* the current PCI configuration . The global reset bit is self -
* clearing , and should clear within a microsecond .
*/
AT_WRITE_REG(hw, REG_MASTER_CTRL,
MASTER_CTRL_LED_MODE | MASTER_CTRL_SOFT_RST);
wmb();
msleep(1 );
/* Wait at least 10ms for All module to be Idle */
for (timeout = 0 ; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
idle_status_data = AT_READ_REG(hw, REG_IDLE_STATUS);
if (idle_status_data == 0 )
break ;
msleep(1 );
cpu_relax();
}
if (timeout >= AT_HW_MAX_IDLE_DELAY) {
netdev_err(adapter->netdev,
"MAC state machine can't be idle since disabled for 10ms second\n" );
return AT_ERR_TIMEOUT;
}
return 0 ;
}
/*
* Performs basic configuration of the adapter .
*
* hw - Struct containing variables accessed by shared code
* Assumes that the controller has previously been reset and is in a
* post - reset uninitialized state . Initializes multicast table ,
* and Calls routines to setup link
* Leaves the transmit and receive units disabled and uninitialized .
*/
int atl1e_init_hw(struct atl1e_hw *hw)
{
s32 ret_val = 0 ;
atl1e_init_pcie(hw);
/* Zero out the Multicast HASH table */
/* clear the old settings from the multicast hash table */
AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0 );
AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1 , 0 );
ret_val = atl1e_phy_init(hw);
return ret_val;
}
/*
* 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 atl1e_get_speed_and_duplex(struct atl1e_hw *hw, u16 *speed, u16 *duplex)
{
int err;
u16 phy_data;
/* Read PHY Specific Status Register (17) */
err = atl1e_read_phy_reg(hw, MII_AT001_PSSR, &phy_data);
if (err)
return err;
if (!(phy_data & MII_AT001_PSSR_SPD_DPLX_RESOLVED))
return AT_ERR_PHY_RES;
switch (phy_data & MII_AT001_PSSR_SPEED) {
case MII_AT001_PSSR_1000MBS:
*speed = SPEED_1000;
break ;
case MII_AT001_PSSR_100MBS:
*speed = SPEED_100;
break ;
case MII_AT001_PSSR_10MBS:
*speed = SPEED_10;
break ;
default :
return AT_ERR_PHY_SPEED;
}
if (phy_data & MII_AT001_PSSR_DPLX)
*duplex = FULL_DUPLEX;
else
*duplex = HALF_DUPLEX;
return 0 ;
}
int atl1e_restart_autoneg(struct atl1e_hw *hw)
{
int err = 0 ;
err = atl1e_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
if (err)
return err;
if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
err = atl1e_write_phy_reg(hw, MII_CTRL1000,
hw->mii_1000t_ctrl_reg);
if (err)
return err;
}
err = atl1e_write_phy_reg(hw, MII_BMCR,
BMCR_RESET | BMCR_ANENABLE | BMCR_ANRESTART);
return err;
}
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