diff options
Diffstat (limited to 'drivers/net/ethernet/atheros/atl1e/atl1e_hw.c')
| -rw-r--r-- | drivers/net/ethernet/atheros/atl1e/atl1e_hw.c | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_hw.c b/drivers/net/ethernet/atheros/atl1e/atl1e_hw.c new file mode 100644 index 000000000..fa89bc27f --- /dev/null +++ b/drivers/net/ethernet/atheros/atl1e/atl1e_hw.c @@ -0,0 +1,637 @@ +// 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 & 0xFF00) == 0x6C00) ? 0 : 1; +} + +void atl1e_hw_set_mac_addr(struct atl1e_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); +} + +/* + * 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) & 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 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, 0x1008); + value |= 0x8000; + AT_WRITE_REG(hw, 0x1008, 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 1000Base-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, 0xB); + if (ret_val) + return ret_val; + ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0xBC00); + 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 = 0x02ef; + /* 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, 0x12); + if (ret_val) + return ret_val; + ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x4C04); + if (ret_val) + return ret_val; + /* p4. 1000T power */ + ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x4); + if (ret_val) + return ret_val; + ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x8BBB); + if (ret_val) + return ret_val; + + ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x5); + if (ret_val) + return ret_val; + ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x2C46); + if (ret_val) + return ret_val; + + msleep(1); + + /*Enable PHY LinkChange Interrupt */ + ret_val = atl1e_write_phy_reg(hw, MII_INT_CTRL, 0xC00); + 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; +} + |