tg3_hw.c

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/*
 * tg3.c: Broadcom Tigon3 ethernet driver.
 *
 * Copyright (C) 2001, 2002, 2003, 2004 David S. Miller (davem@redhat.com)
 * Copyright (C) 2001, 2002, 2003 Jeff Garzik (jgarzik@pobox.com)
 * Copyright (C) 2004 Sun Microsystems Inc.
 * Copyright (C) 2005-2011 Broadcom Corporation.
 *
 * Firmware is:
 *      Derived from proprietary unpublished source code,
 *      Copyright (C) 2000-2003 Broadcom Corporation.
 *
 *      Permission is hereby granted for the distribution of this firmware
 *      data in hexadecimal or equivalent format, provided this copyright
 *      notice is accompanying it.
 */

FILE_LICENCE ( GPL2_ONLY );

#include <mii.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <byteswap.h>
#include <ipxe/pci.h>
#include <ipxe/iobuf.h>
#include <ipxe/timer.h>
#include <ipxe/malloc.h>
#include <ipxe/if_ether.h>
#include <ipxe/ethernet.h>
#include <ipxe/netdevice.h>

#include "tg3.h"

#define RESET_KIND_SHUTDOWN     0
#define RESET_KIND_INIT         1
#define RESET_KIND_SUSPEND      2

#define TG3_DEF_MAC_MODE        0

void tg3_write_indirect_reg32(struct tg3 *tp, u32 off, u32 val)
{       DBGP("%s\n", __func__);

        pci_write_config_dword(tp->pdev, TG3PCI_REG_BASE_ADDR, off);
        pci_write_config_dword(tp->pdev, TG3PCI_REG_DATA, val);
}

u32 tg3_read_indirect_reg32(struct tg3 *tp, u32 off)
{       DBGP("%s\n", __func__);

        u32 val;

        pci_write_config_dword(tp->pdev, TG3PCI_REG_BASE_ADDR, off);
        pci_read_config_dword(tp->pdev, TG3PCI_REG_DATA, &val);
        return val;
}

static u32 tg3_read32_mbox_5906(struct tg3 *tp, u32 off)
{       DBGP("%s\n", __func__);

        return readl(tp->regs + off + GRCMBOX_BASE);
}

static void tg3_write32_mbox_5906(struct tg3 *tp, u32 off, u32 val)
{       DBGP("%s\n", __func__);

        writel(val, tp->regs + off + GRCMBOX_BASE);
}

void tg3_write_indirect_mbox(struct tg3 *tp, u32 off, u32 val)
{       DBGP("%s\n", __func__);

        if (off == (MAILBOX_RCVRET_CON_IDX_0 + TG3_64BIT_REG_LOW)) {
                pci_write_config_dword(tp->pdev, TG3PCI_RCV_RET_RING_CON_IDX +
                                       TG3_64BIT_REG_LOW, val);
                return;
        }
        if (off == TG3_RX_STD_PROD_IDX_REG) {
                pci_write_config_dword(tp->pdev, TG3PCI_STD_RING_PROD_IDX +
                                       TG3_64BIT_REG_LOW, val);
                return;
        }

        pci_write_config_dword(tp->pdev, TG3PCI_REG_BASE_ADDR, off + 0x5600);
        pci_write_config_dword(tp->pdev, TG3PCI_REG_DATA, val);

        /* In indirect mode when disabling interrupts, we also need
         * to clear the interrupt bit in the GRC local ctrl register.
         */
        if ((off == (MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW)) &&
            (val == 0x1)) {
                pci_write_config_dword(tp->pdev, TG3PCI_MISC_LOCAL_CTRL,
                                       tp->grc_local_ctrl|GRC_LCLCTRL_CLEARINT);
        }
}

u32 tg3_read_indirect_mbox(struct tg3 *tp, u32 off)
{       DBGP("%s\n", __func__);

        u32 val;

        pci_write_config_dword(tp->pdev, TG3PCI_REG_BASE_ADDR, off + 0x5600);
        pci_read_config_dword(tp->pdev, TG3PCI_REG_DATA, &val);

        return val;
}

/* usec_wait specifies the wait time in usec when writing to certain registers
 * where it is unsafe to read back the register without some delay.
 * GRC_LOCAL_CTRL is one example if the GPIOs are toggled to switch power.
 * TG3PCI_CLOCK_CTRL is another example if the clock frequencies are changed.
 */
void _tw32_flush(struct tg3 *tp, u32 off, u32 val, u32 usec_wait)
{       DBGP("%s\n", __func__);

        tw32(off, val);
        if (usec_wait)
                udelay(usec_wait);
        tr32(off);

        /* Wait again after the read for the posted method to guarantee that
         * the wait time is met.
         */
        if (usec_wait)
                udelay(usec_wait);
}

/* stolen from legacy etherboot tg3 driver */
void tg3_set_power_state_0(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        uint16_t power_control;
        int pm = tp->pm_cap;

        /* Make sure register accesses (indirect or otherwise)
         * will function correctly.
         */
        pci_write_config_dword(tp->pdev,  TG3PCI_MISC_HOST_CTRL, tp->misc_host_ctrl);

        pci_read_config_word(tp->pdev, pm + PCI_PM_CTRL, &power_control);

        power_control |= PCI_PM_CTRL_PME_STATUS;
        power_control &= ~(PCI_PM_CTRL_STATE_MASK);
        power_control |= 0;
        pci_write_config_word(tp->pdev, pm + PCI_PM_CTRL, power_control);

        tw32_wait_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl, 100);

        return;
}

void tg3_read_mem(struct tg3 *tp, u32 off, u32 *val)
{       DBGP("%s\n", __func__);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906 &&
            (off >= NIC_SRAM_STATS_BLK) && (off < NIC_SRAM_TX_BUFFER_DESC)) {
                *val = 0;
                return;
        }

        pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_BASE_ADDR, off);
        pci_read_config_dword(tp->pdev, TG3PCI_MEM_WIN_DATA, val);

        /* Always leave this as zero. */
        pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_BASE_ADDR, 0);
}

#define PCI_VENDOR_ID_ARIMA                0x161f

static void tg3_get_eeprom_hw_cfg(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        u32 val;
        u16 pmcsr;

        /* On some early chips the SRAM cannot be accessed in D3hot state,
         * so need make sure we're in D0.
         */
        pci_read_config_word(tp->pdev, tp->pm_cap + PCI_PM_CTRL, &pmcsr);
        pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
        pci_write_config_word(tp->pdev, tp->pm_cap + PCI_PM_CTRL, pmcsr);
        mdelay(1);

        /* Make sure register accesses (indirect or otherwise)
         * will function correctly.
         */
        pci_write_config_dword(tp->pdev, TG3PCI_MISC_HOST_CTRL,
                               tp->misc_host_ctrl);

        /* The memory arbiter has to be enabled in order for SRAM accesses
         * to succeed.  Normally on powerup the tg3 chip firmware will make
         * sure it is enabled, but other entities such as system netboot
         * code might disable it.
         */
        val = tr32(MEMARB_MODE);
        tw32(MEMARB_MODE, val | MEMARB_MODE_ENABLE);

        tp->phy_id = TG3_PHY_ID_INVALID;
        tp->led_ctrl = LED_CTRL_MODE_PHY_1;

        /* Assume an onboard device by default.  */
        tg3_flag_set(tp, EEPROM_WRITE_PROT);

        tg3_read_mem(tp, NIC_SRAM_DATA_SIG, &val);
        if (val == NIC_SRAM_DATA_SIG_MAGIC) {
                u32 nic_cfg, led_cfg;
                u32 nic_phy_id, ver, cfg2 = 0, cfg4 = 0, eeprom_phy_id;
                int eeprom_phy_serdes = 0;

                tg3_read_mem(tp, NIC_SRAM_DATA_CFG, &nic_cfg);
                tp->nic_sram_data_cfg = nic_cfg;

                tg3_read_mem(tp, NIC_SRAM_DATA_VER, &ver);
                ver >>= NIC_SRAM_DATA_VER_SHIFT;
                if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5700 &&
                    GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5701 &&
                    GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5703 &&
                    (ver > 0) && (ver < 0x100))
                        tg3_read_mem(tp, NIC_SRAM_DATA_CFG_2, &cfg2);

                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785)
                        tg3_read_mem(tp, NIC_SRAM_DATA_CFG_4, &cfg4);

                if ((nic_cfg & NIC_SRAM_DATA_CFG_PHY_TYPE_MASK) ==
                    NIC_SRAM_DATA_CFG_PHY_TYPE_FIBER)
                        eeprom_phy_serdes = 1;

                tg3_read_mem(tp, NIC_SRAM_DATA_PHY_ID, &nic_phy_id);
                if (nic_phy_id != 0) {
                        u32 id1 = nic_phy_id & NIC_SRAM_DATA_PHY_ID1_MASK;
                        u32 id2 = nic_phy_id & NIC_SRAM_DATA_PHY_ID2_MASK;

                        eeprom_phy_id  = (id1 >> 16) << 10;
                        eeprom_phy_id |= (id2 & 0xfc00) << 16;
                        eeprom_phy_id |= (id2 & 0x03ff) <<  0;
                } else
                        eeprom_phy_id = 0;

                tp->phy_id = eeprom_phy_id;
                if (eeprom_phy_serdes) {
                        if (!tg3_flag(tp, 5705_PLUS))
                                tp->phy_flags |= TG3_PHYFLG_PHY_SERDES;
                        else
                                tp->phy_flags |= TG3_PHYFLG_MII_SERDES;
                }

                if (tg3_flag(tp, 5750_PLUS))
                        led_cfg = cfg2 & (NIC_SRAM_DATA_CFG_LED_MODE_MASK |
                                    SHASTA_EXT_LED_MODE_MASK);
                else
                        led_cfg = nic_cfg & NIC_SRAM_DATA_CFG_LED_MODE_MASK;

                switch (led_cfg) {
                default:
                case NIC_SRAM_DATA_CFG_LED_MODE_PHY_1:
                        tp->led_ctrl = LED_CTRL_MODE_PHY_1;
                        break;

                case NIC_SRAM_DATA_CFG_LED_MODE_PHY_2:
                        tp->led_ctrl = LED_CTRL_MODE_PHY_2;
                        break;

                case NIC_SRAM_DATA_CFG_LED_MODE_MAC:
                        tp->led_ctrl = LED_CTRL_MODE_MAC;

                        /* Default to PHY_1_MODE if 0 (MAC_MODE) is
                         * read on some older 5700/5701 bootcode.
                         */
                        if (GET_ASIC_REV(tp->pci_chip_rev_id) ==
                            ASIC_REV_5700 ||
                            GET_ASIC_REV(tp->pci_chip_rev_id) ==
                            ASIC_REV_5701)
                                tp->led_ctrl = LED_CTRL_MODE_PHY_1;

                        break;

                case SHASTA_EXT_LED_SHARED:
                        tp->led_ctrl = LED_CTRL_MODE_SHARED;
                        if (tp->pci_chip_rev_id != CHIPREV_ID_5750_A0 &&
                            tp->pci_chip_rev_id != CHIPREV_ID_5750_A1)
                                tp->led_ctrl |= (LED_CTRL_MODE_PHY_1 |
                                                 LED_CTRL_MODE_PHY_2);
                        break;

                case SHASTA_EXT_LED_MAC:
                        tp->led_ctrl = LED_CTRL_MODE_SHASTA_MAC;
                        break;

                case SHASTA_EXT_LED_COMBO:
                        tp->led_ctrl = LED_CTRL_MODE_COMBO;
                        if (tp->pci_chip_rev_id != CHIPREV_ID_5750_A0)
                                tp->led_ctrl |= (LED_CTRL_MODE_PHY_1 |
                                                 LED_CTRL_MODE_PHY_2);
                        break;

                }

                if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700 ||
                     GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5701) &&
                    tp->subsystem_vendor == PCI_VENDOR_ID_DELL)
                        tp->led_ctrl = LED_CTRL_MODE_PHY_2;

                if (GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5784_AX)
                        tp->led_ctrl = LED_CTRL_MODE_PHY_1;

                if (nic_cfg & NIC_SRAM_DATA_CFG_EEPROM_WP) {
                        tg3_flag_set(tp, EEPROM_WRITE_PROT);
                        if ((tp->subsystem_vendor ==
                             PCI_VENDOR_ID_ARIMA) &&
                            (tp->subsystem_device == 0x205a ||
                             tp->subsystem_device == 0x2063))
                                tg3_flag_clear(tp, EEPROM_WRITE_PROT);
                } else {
                        tg3_flag_clear(tp, EEPROM_WRITE_PROT);
                        tg3_flag_set(tp, IS_NIC);
                }

                if (nic_cfg & NIC_SRAM_DATA_CFG_ASF_ENABLE) {
                        tg3_flag_set(tp, ENABLE_ASF);
                        if (tg3_flag(tp, 5750_PLUS))
                                tg3_flag_set(tp, ASF_NEW_HANDSHAKE);
                }

                if ((nic_cfg & NIC_SRAM_DATA_CFG_APE_ENABLE) &&
                    tg3_flag(tp, ENABLE_ASF))
                        tg3_flag_set(tp, ENABLE_APE);

                if (cfg2 & (1 << 17))
                        tp->phy_flags |= TG3_PHYFLG_CAPACITIVE_COUPLING;

                /* serdes signal pre-emphasis in register 0x590 set by */
                /* bootcode if bit 18 is set */
                if (cfg2 & (1 << 18))
                        tp->phy_flags |= TG3_PHYFLG_SERDES_PREEMPHASIS;

                if ((tg3_flag(tp, 57765_PLUS) ||
                     (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 &&
                      GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5784_AX)) &&
                    (cfg2 & NIC_SRAM_DATA_CFG_2_APD_EN))
                        tp->phy_flags |= TG3_PHYFLG_ENABLE_APD;

                if (tg3_flag(tp, PCI_EXPRESS) &&
                    GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785 &&
                    !tg3_flag(tp, 57765_PLUS)) {
                        u32 cfg3;

                        tg3_read_mem(tp, NIC_SRAM_DATA_CFG_3, &cfg3);
                }

                if (cfg4 & NIC_SRAM_RGMII_INBAND_DISABLE)
                        tg3_flag_set(tp, RGMII_INBAND_DISABLE);
                if (cfg4 & NIC_SRAM_RGMII_EXT_IBND_RX_EN)
                        tg3_flag_set(tp, RGMII_EXT_IBND_RX_EN);
                if (cfg4 & NIC_SRAM_RGMII_EXT_IBND_TX_EN)
                        tg3_flag_set(tp, RGMII_EXT_IBND_TX_EN);
        }
}

static void tg3_switch_clocks(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        u32 clock_ctrl;
        u32 orig_clock_ctrl;

        if (tg3_flag(tp, CPMU_PRESENT) || tg3_flag(tp, 5780_CLASS))
                return;

        clock_ctrl = tr32(TG3PCI_CLOCK_CTRL);

        orig_clock_ctrl = clock_ctrl;
        clock_ctrl &= (CLOCK_CTRL_FORCE_CLKRUN |
                       CLOCK_CTRL_CLKRUN_OENABLE |
                       0x1f);
        tp->pci_clock_ctrl = clock_ctrl;

        if (tg3_flag(tp, 5705_PLUS)) {
                if (orig_clock_ctrl & CLOCK_CTRL_625_CORE) {
                        tw32_wait_f(TG3PCI_CLOCK_CTRL,
                                    clock_ctrl | CLOCK_CTRL_625_CORE, 40);
                }
        } else if ((orig_clock_ctrl & CLOCK_CTRL_44MHZ_CORE) != 0) {
                tw32_wait_f(TG3PCI_CLOCK_CTRL,
                            clock_ctrl |
                            (CLOCK_CTRL_44MHZ_CORE | CLOCK_CTRL_ALTCLK),
                            40);
                tw32_wait_f(TG3PCI_CLOCK_CTRL,
                            clock_ctrl | (CLOCK_CTRL_ALTCLK),
                            40);
        }
        tw32_wait_f(TG3PCI_CLOCK_CTRL, clock_ctrl, 40);
}

int tg3_get_invariants(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        u32 misc_ctrl_reg;
        u32 pci_state_reg, grc_misc_cfg;
        u32 val;
        u16 pci_cmd;
        int err;

        /* Force memory write invalidate off.  If we leave it on,
         * then on 5700_BX chips we have to enable a workaround.
         * The workaround is to set the TG3PCI_DMA_RW_CTRL boundary
         * to match the cacheline size.  The Broadcom driver have this
         * workaround but turns MWI off all the times so never uses
         * it.  This seems to suggest that the workaround is insufficient.
         */
        pci_read_config_word(tp->pdev, PCI_COMMAND, &pci_cmd);
        pci_cmd &= ~PCI_COMMAND_INVALIDATE;
        pci_write_config_word(tp->pdev, PCI_COMMAND, pci_cmd);

        /* It is absolutely critical that TG3PCI_MISC_HOST_CTRL
         * has the register indirect write enable bit set before
         * we try to access any of the MMIO registers.  It is also
         * critical that the PCI-X hw workaround situation is decided
         * before that as well.
         */
        pci_read_config_dword(tp->pdev, TG3PCI_MISC_HOST_CTRL,
                              &misc_ctrl_reg);

        tp->pci_chip_rev_id = (misc_ctrl_reg >>
                               MISC_HOST_CTRL_CHIPREV_SHIFT);
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_USE_PROD_ID_REG) {
                u32 prod_id_asic_rev;

                if (tp->pdev->device == TG3PCI_DEVICE_TIGON3_5717 ||
                    tp->pdev->device == TG3PCI_DEVICE_TIGON3_5718 ||
                    tp->pdev->device == TG3PCI_DEVICE_TIGON3_5719 ||
                    tp->pdev->device == TG3PCI_DEVICE_TIGON3_5720)
                        pci_read_config_dword(tp->pdev,
                                              TG3PCI_GEN2_PRODID_ASICREV,
                                              &prod_id_asic_rev);
                else if (tp->pdev->device == TG3PCI_DEVICE_TIGON3_57781 ||
                         tp->pdev->device == TG3PCI_DEVICE_TIGON3_57785 ||
                         tp->pdev->device == TG3PCI_DEVICE_TIGON3_57761 ||
                         tp->pdev->device == TG3PCI_DEVICE_TIGON3_57762 ||
                         tp->pdev->device == TG3PCI_DEVICE_TIGON3_57765 ||
                         tp->pdev->device == TG3PCI_DEVICE_TIGON3_57766 ||
                         tp->pdev->device == TG3PCI_DEVICE_TIGON3_57791 ||
                         tp->pdev->device == TG3PCI_DEVICE_TIGON3_57795)
                        pci_read_config_dword(tp->pdev,
                                              TG3PCI_GEN15_PRODID_ASICREV,
                                              &prod_id_asic_rev);
                else
                        pci_read_config_dword(tp->pdev, TG3PCI_PRODID_ASICREV,
                                              &prod_id_asic_rev);

                tp->pci_chip_rev_id = prod_id_asic_rev;
        }

        /* Wrong chip ID in 5752 A0. This code can be removed later
         * as A0 is not in production.
         */
        if (tp->pci_chip_rev_id == CHIPREV_ID_5752_A0_HW)
                tp->pci_chip_rev_id = CHIPREV_ID_5752_A0;

        /* Initialize misc host control in PCI block. */
        tp->misc_host_ctrl |= (misc_ctrl_reg &
                               MISC_HOST_CTRL_CHIPREV);
        pci_write_config_dword(tp->pdev, TG3PCI_MISC_HOST_CTRL,
                               tp->misc_host_ctrl);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720)
                tg3_flag_set(tp, 5717_PLUS);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57766 ||
            tg3_flag(tp, 5717_PLUS))
                tg3_flag_set(tp, 57765_PLUS);

        /* Intentionally exclude ASIC_REV_5906 */
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5787 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 ||
            tg3_flag(tp, 57765_PLUS))
                tg3_flag_set(tp, 5755_PLUS);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906 ||
            tg3_flag(tp, 5755_PLUS) ||
            tg3_flag(tp, 5780_CLASS))
                tg3_flag_set(tp, 5750_PLUS);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705 ||
            tg3_flag(tp, 5750_PLUS))
                tg3_flag_set(tp, 5705_PLUS);

        if (tg3_flag(tp, 5717_PLUS))
                tg3_flag_set(tp, LRG_PROD_RING_CAP);

        pci_read_config_dword(tp->pdev, TG3PCI_PCISTATE,
                              &pci_state_reg);

        tp->pcie_cap = pci_find_capability(tp->pdev, PCI_CAP_ID_EXP);
        if (tp->pcie_cap != 0) {
                u16 lnkctl;

                tg3_flag_set(tp, PCI_EXPRESS);

                pci_read_config_word(tp->pdev,
                                     tp->pcie_cap + PCI_EXP_LNKCTL,
                                     &lnkctl);
                if (lnkctl & PCI_EXP_LNKCTL_CLKREQ_EN) {
                        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
                            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761 ||
                            tp->pci_chip_rev_id == CHIPREV_ID_57780_A0 ||
                            tp->pci_chip_rev_id == CHIPREV_ID_57780_A1)
                                tg3_flag_set(tp, CLKREQ_BUG);
                } else if (tp->pci_chip_rev_id == CHIPREV_ID_5717_A0) {
                        tg3_flag_set(tp, L1PLLPD_EN);
                }
        } else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785) {
                tg3_flag_set(tp, PCI_EXPRESS);
        } else if (!tg3_flag(tp, 5705_PLUS) ||
                   tg3_flag(tp, 5780_CLASS)) {
                tp->pcix_cap = pci_find_capability(tp->pdev, PCI_CAP_ID_PCIX);
                if (!tp->pcix_cap) {
                        DBGC(&tp->pdev->dev,
                                "Cannot find PCI-X capability, aborting\n");
                        return -EIO;
                }

                if (!(pci_state_reg & PCISTATE_CONV_PCI_MODE))
                        tg3_flag_set(tp, PCIX_MODE);
        }

        /* If we have an AMD 762 or VIA K8T800 chipset, write
         * reordering to the mailbox registers done by the host
         * controller can cause major troubles.  We read back from
         * every mailbox register write to force the writes to be
         * posted to the chip in order.
         */

        pci_read_config_byte(tp->pdev, PCI_CACHE_LINE_SIZE,
                             &tp->pci_cacheline_sz);
        pci_read_config_byte(tp->pdev, PCI_LATENCY_TIMER,
                             &tp->pci_lat_timer);
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5703 &&
            tp->pci_lat_timer < 64) {
                tp->pci_lat_timer = 64;
                pci_write_config_byte(tp->pdev, PCI_LATENCY_TIMER,
                                      tp->pci_lat_timer);
        }

        if (GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5700_BX) {
                /* 5700 BX chips need to have their TX producer index
                 * mailboxes written twice to workaround a bug.
                 */
                tg3_flag_set(tp, TXD_MBOX_HWBUG);

                /* If we are in PCI-X mode, enable register write workaround.
                 *
                 * The workaround is to use indirect register accesses
                 * for all chip writes not to mailbox registers.
                 */
                if (tg3_flag(tp, PCIX_MODE)) {
                        u32 pm_reg;

                        tg3_flag_set(tp, PCIX_TARGET_HWBUG);

                        /* The chip can have it's power management PCI config
                         * space registers clobbered due to this bug.
                         * So explicitly force the chip into D0 here.
                         */
                        pci_read_config_dword(tp->pdev,
                                              tp->pm_cap + PCI_PM_CTRL,
                                              &pm_reg);
                        pm_reg &= ~PCI_PM_CTRL_STATE_MASK;
                        pm_reg |= PCI_PM_CTRL_PME_ENABLE | 0 /* D0 */;
                        pci_write_config_dword(tp->pdev,
                                               tp->pm_cap + PCI_PM_CTRL,
                                               pm_reg);

                        /* Also, force SERR#/PERR# in PCI command. */
                        pci_read_config_word(tp->pdev, PCI_COMMAND, &pci_cmd);
                        pci_cmd |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
                        pci_write_config_word(tp->pdev, PCI_COMMAND, pci_cmd);
                }
        }

        if ((pci_state_reg & PCISTATE_BUS_SPEED_HIGH) != 0)
                tg3_flag_set(tp, PCI_HIGH_SPEED);
        if ((pci_state_reg & PCISTATE_BUS_32BIT) != 0)
                tg3_flag_set(tp, PCI_32BIT);

        /* Chip-specific fixup from Broadcom driver */
        if ((tp->pci_chip_rev_id == CHIPREV_ID_5704_A0) &&
            (!(pci_state_reg & PCISTATE_RETRY_SAME_DMA))) {
                pci_state_reg |= PCISTATE_RETRY_SAME_DMA;
                pci_write_config_dword(tp->pdev, TG3PCI_PCISTATE, pci_state_reg);
        }

        tp->write32_mbox = tg3_write_indirect_reg32;
        tp->write32_rx_mbox = tg3_write_indirect_mbox;
        tp->write32_tx_mbox = tg3_write_indirect_mbox;
        tp->read32_mbox = tg3_read_indirect_mbox;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) {
                tp->read32_mbox = tg3_read32_mbox_5906;
                tp->write32_mbox = tg3_write32_mbox_5906;
                tp->write32_tx_mbox = tg3_write32_mbox_5906;
                tp->write32_rx_mbox = tg3_write32_mbox_5906;
        }

        /* Get eeprom hw config before calling tg3_set_power_state().
         * In particular, the TG3_FLAG_IS_NIC flag must be
         * determined before calling tg3_set_power_state() so that
         * we know whether or not to switch out of Vaux power.
         * When the flag is set, it means that GPIO1 is used for eeprom
         * write protect and also implies that it is a LOM where GPIOs
         * are not used to switch power.
         */
        tg3_get_eeprom_hw_cfg(tp);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 ||
            tg3_flag(tp, 57765_PLUS))
                tg3_flag_set(tp, CPMU_PRESENT);

        /* Set up tp->grc_local_ctrl before calling tg3_power_up().
         * GPIO1 driven high will bring 5700's external PHY out of reset.
         * It is also used as eeprom write protect on LOMs.
         */
        tp->grc_local_ctrl = GRC_LCLCTRL_INT_ON_ATTN | GRC_LCLCTRL_AUTO_SEEPROM;
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700 ||
            tg3_flag(tp, EEPROM_WRITE_PROT))
                tp->grc_local_ctrl |= (GRC_LCLCTRL_GPIO_OE1 |
                                       GRC_LCLCTRL_GPIO_OUTPUT1);
        /* Unused GPIO3 must be driven as output on 5752 because there
         * are no pull-up resistors on unused GPIO pins.
         */
        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
                tp->grc_local_ctrl |= GRC_LCLCTRL_GPIO_OE3;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765)
                tp->grc_local_ctrl |= GRC_LCLCTRL_GPIO_UART_SEL;

        if (tp->pdev->device == PCI_DEVICE_ID_TIGON3_5761 ||
            tp->pdev->device == TG3PCI_DEVICE_TIGON3_5761S) {
                /* Turn off the debug UART. */
                tp->grc_local_ctrl |= GRC_LCLCTRL_GPIO_UART_SEL;
                if (tg3_flag(tp, IS_NIC))
                        /* Keep VMain power. */
                        tp->grc_local_ctrl |= GRC_LCLCTRL_GPIO_OE0 |
                                              GRC_LCLCTRL_GPIO_OUTPUT0;
        }

        /* Force the chip into D0. */
        tg3_set_power_state_0(tp);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
                tp->phy_flags |= TG3_PHYFLG_IS_FET;

        /* A few boards don't want Ethernet@WireSpeed phy feature */
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700 ||
            (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705 &&
             (tp->pci_chip_rev_id != CHIPREV_ID_5705_A0) &&
             (tp->pci_chip_rev_id != CHIPREV_ID_5705_A1)) ||
            (tp->phy_flags & TG3_PHYFLG_IS_FET) ||
            (tp->phy_flags & TG3_PHYFLG_ANY_SERDES))
                tp->phy_flags |= TG3_PHYFLG_NO_ETH_WIRE_SPEED;

        if (GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5703_AX ||
            GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5704_AX)
                tp->phy_flags |= TG3_PHYFLG_ADC_BUG;
        if (tp->pci_chip_rev_id == CHIPREV_ID_5704_A0)
                tp->phy_flags |= TG3_PHYFLG_5704_A0_BUG;

        if (tg3_flag(tp, 5705_PLUS) &&
            !(tp->phy_flags & TG3_PHYFLG_IS_FET) &&
            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785 &&
            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_57780 &&
            !tg3_flag(tp, 57765_PLUS)) {
                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755 ||
                    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5787 ||
                    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
                    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761) {
                        if (tp->pdev->device != PCI_DEVICE_ID_TIGON3_5756 &&
                            tp->pdev->device != PCI_DEVICE_ID_TIGON3_5722)
                                tp->phy_flags |= TG3_PHYFLG_JITTER_BUG;
                        if (tp->pdev->device == PCI_DEVICE_ID_TIGON3_5755M)
                                tp->phy_flags |= TG3_PHYFLG_ADJUST_TRIM;
                } else
                        tp->phy_flags |= TG3_PHYFLG_BER_BUG;
        }

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 &&
            GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5784_AX) {
                tp->phy_otp = tg3_read_otp_phycfg(tp);
                if (tp->phy_otp == 0)
                        tp->phy_otp = TG3_OTP_DEFAULT;
        }

        if (tg3_flag(tp, CPMU_PRESENT))
                tp->mi_mode = MAC_MI_MODE_500KHZ_CONST;
        else
                tp->mi_mode = MAC_MI_MODE_BASE;

        tp->coalesce_mode = 0;
        if (GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5700_AX &&
            GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5700_BX)
                tp->coalesce_mode |= HOSTCC_MODE_32BYTE;

        /* Set these bits to enable statistics workaround. */
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717 ||
            tp->pci_chip_rev_id == CHIPREV_ID_5719_A0 ||
            tp->pci_chip_rev_id == CHIPREV_ID_5720_A0) {
                tp->coalesce_mode |= HOSTCC_MODE_ATTN;
                tp->grc_mode |= GRC_MODE_IRQ_ON_FLOW_ATTN;
        }

        tg3_mdio_init(tp);

        /* Initialize data/descriptor byte/word swapping. */
        val = tr32(GRC_MODE);
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720)
                val &= (GRC_MODE_BYTE_SWAP_B2HRX_DATA |
                        GRC_MODE_WORD_SWAP_B2HRX_DATA |
                        GRC_MODE_B2HRX_ENABLE |
                        GRC_MODE_HTX2B_ENABLE |
                        GRC_MODE_HOST_STACKUP);
        else
                val &= GRC_MODE_HOST_STACKUP;

        tw32(GRC_MODE, val | tp->grc_mode);

        tg3_switch_clocks(tp);

        /* Clear this out for sanity. */
        tw32(TG3PCI_MEM_WIN_BASE_ADDR, 0);

        pci_read_config_dword(tp->pdev, TG3PCI_PCISTATE,
                              &pci_state_reg);
        if ((pci_state_reg & PCISTATE_CONV_PCI_MODE) == 0 &&
            !tg3_flag(tp, PCIX_TARGET_HWBUG)) {
                u32 chiprevid = GET_CHIP_REV_ID(tp->misc_host_ctrl);

                if (chiprevid == CHIPREV_ID_5701_A0 ||
                    chiprevid == CHIPREV_ID_5701_B0 ||
                    chiprevid == CHIPREV_ID_5701_B2 ||
                    chiprevid == CHIPREV_ID_5701_B5) {
                        void *sram_base;

                        /* Write some dummy words into the SRAM status block
                         * area, see if it reads back correctly.  If the return
                         * value is bad, force enable the PCIX workaround.
                         */
                        sram_base = tp->regs + NIC_SRAM_WIN_BASE + NIC_SRAM_STATS_BLK;

                        writel(0x00000000, sram_base);
                        writel(0x00000000, sram_base + 4);
                        writel(0xffffffff, sram_base + 4);
                        if (readl(sram_base) != 0x00000000)
                                tg3_flag_set(tp, PCIX_TARGET_HWBUG);
                }
        }

        udelay(50);
        /* FIXME: do we need nvram access? */
///     tg3_nvram_init(tp);

        grc_misc_cfg = tr32(GRC_MISC_CFG);
        grc_misc_cfg &= GRC_MISC_CFG_BOARD_ID_MASK;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705 &&
            (grc_misc_cfg == GRC_MISC_CFG_BOARD_ID_5788 ||
             grc_misc_cfg == GRC_MISC_CFG_BOARD_ID_5788M))
                tg3_flag_set(tp, IS_5788);

        if (!tg3_flag(tp, IS_5788) &&
            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5700)
                tg3_flag_set(tp, TAGGED_STATUS);
        if (tg3_flag(tp, TAGGED_STATUS)) {
                tp->coalesce_mode |= (HOSTCC_MODE_CLRTICK_RXBD |
                                      HOSTCC_MODE_CLRTICK_TXBD);

                tp->misc_host_ctrl |= MISC_HOST_CTRL_TAGGED_STATUS;
                pci_write_config_dword(tp->pdev, TG3PCI_MISC_HOST_CTRL,
                                       tp->misc_host_ctrl);
        }

        /* Preserve the APE MAC_MODE bits */
        if (tg3_flag(tp, ENABLE_APE))
                tp->mac_mode = MAC_MODE_APE_TX_EN | MAC_MODE_APE_RX_EN;
        else
                tp->mac_mode = TG3_DEF_MAC_MODE;

        /* these are limited to 10/100 only */
        if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5703 &&
             (grc_misc_cfg == 0x8000 || grc_misc_cfg == 0x4000)) ||
            (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705 &&
             tp->pdev->vendor == PCI_VENDOR_ID_BROADCOM &&
             (tp->pdev->device == PCI_DEVICE_ID_TIGON3_5901 ||
              tp->pdev->device == PCI_DEVICE_ID_TIGON3_5901_2 ||
              tp->pdev->device == PCI_DEVICE_ID_TIGON3_5705F)) ||
            (tp->pdev->vendor == PCI_VENDOR_ID_BROADCOM &&
             (tp->pdev->device == PCI_DEVICE_ID_TIGON3_5751F ||
              tp->pdev->device == PCI_DEVICE_ID_TIGON3_5753F ||
              tp->pdev->device == PCI_DEVICE_ID_TIGON3_5787F)) ||
            tp->pdev->device == TG3PCI_DEVICE_TIGON3_57790 ||
            tp->pdev->device == TG3PCI_DEVICE_TIGON3_57791 ||
            tp->pdev->device == TG3PCI_DEVICE_TIGON3_57795 ||
            (tp->phy_flags & TG3_PHYFLG_IS_FET))
                tp->phy_flags |= TG3_PHYFLG_10_100_ONLY;

        err = tg3_phy_probe(tp);
        if (err) {
                DBGC(&tp->pdev->dev, "phy probe failed, err: %s\n", strerror(err));
                /* ... but do not return immediately ... */
        }

        if (tp->phy_flags & TG3_PHYFLG_PHY_SERDES) {
                tp->phy_flags &= ~TG3_PHYFLG_USE_MI_INTERRUPT;
        } else {
                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700)
                        tp->phy_flags |= TG3_PHYFLG_USE_MI_INTERRUPT;
                else
                        tp->phy_flags &= ~TG3_PHYFLG_USE_MI_INTERRUPT;
        }

        /* For all SERDES we poll the MAC status register. */
        if (tp->phy_flags & TG3_PHYFLG_PHY_SERDES)
                tg3_flag_set(tp, POLL_SERDES);
        else
                tg3_flag_clear(tp, POLL_SERDES);

        /* Increment the rx prod index on the rx std ring by at most
         * 8 for these chips to workaround hw errata.
         */
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755)
                tp->rx_std_max_post = 8;

        return err;
}

void tg3_init_bufmgr_config(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        if (tg3_flag(tp, 57765_PLUS)) {
                tp->bufmgr_config.mbuf_read_dma_low_water =
                        DEFAULT_MB_RDMA_LOW_WATER_5705;
                tp->bufmgr_config.mbuf_mac_rx_low_water =
                        DEFAULT_MB_MACRX_LOW_WATER_57765;
                tp->bufmgr_config.mbuf_high_water =
                        DEFAULT_MB_HIGH_WATER_57765;

                tp->bufmgr_config.mbuf_read_dma_low_water_jumbo =
                        DEFAULT_MB_RDMA_LOW_WATER_5705;
                tp->bufmgr_config.mbuf_mac_rx_low_water_jumbo =
                        DEFAULT_MB_MACRX_LOW_WATER_JUMBO_57765;
                tp->bufmgr_config.mbuf_high_water_jumbo =
                        DEFAULT_MB_HIGH_WATER_JUMBO_57765;
        } else if (tg3_flag(tp, 5705_PLUS)) {
                tp->bufmgr_config.mbuf_read_dma_low_water =
                        DEFAULT_MB_RDMA_LOW_WATER_5705;
                tp->bufmgr_config.mbuf_mac_rx_low_water =
                        DEFAULT_MB_MACRX_LOW_WATER_5705;
                tp->bufmgr_config.mbuf_high_water =
                        DEFAULT_MB_HIGH_WATER_5705;
                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) {
                        tp->bufmgr_config.mbuf_mac_rx_low_water =
                                DEFAULT_MB_MACRX_LOW_WATER_5906;
                        tp->bufmgr_config.mbuf_high_water =
                                DEFAULT_MB_HIGH_WATER_5906;
                }

                tp->bufmgr_config.mbuf_read_dma_low_water_jumbo =
                        DEFAULT_MB_RDMA_LOW_WATER_JUMBO_5780;
                tp->bufmgr_config.mbuf_mac_rx_low_water_jumbo =
                        DEFAULT_MB_MACRX_LOW_WATER_JUMBO_5780;
                tp->bufmgr_config.mbuf_high_water_jumbo =
                        DEFAULT_MB_HIGH_WATER_JUMBO_5780;
        } else {
                tp->bufmgr_config.mbuf_read_dma_low_water =
                        DEFAULT_MB_RDMA_LOW_WATER;
                tp->bufmgr_config.mbuf_mac_rx_low_water =
                        DEFAULT_MB_MACRX_LOW_WATER;
                tp->bufmgr_config.mbuf_high_water =
                        DEFAULT_MB_HIGH_WATER;

                tp->bufmgr_config.mbuf_read_dma_low_water_jumbo =
                        DEFAULT_MB_RDMA_LOW_WATER_JUMBO;
                tp->bufmgr_config.mbuf_mac_rx_low_water_jumbo =
                        DEFAULT_MB_MACRX_LOW_WATER_JUMBO;
                tp->bufmgr_config.mbuf_high_water_jumbo =
                        DEFAULT_MB_HIGH_WATER_JUMBO;
        }

        tp->bufmgr_config.dma_low_water = DEFAULT_DMA_LOW_WATER;
        tp->bufmgr_config.dma_high_water = DEFAULT_DMA_HIGH_WATER;
}

#define TG3_FW_EVENT_TIMEOUT_USEC 2500

void tg3_wait_for_event_ack(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        int i;

        for (i = 0; i < TG3_FW_EVENT_TIMEOUT_USEC / 10; i++) {
                if (!(tr32(GRC_RX_CPU_EVENT) & GRC_RX_CPU_DRIVER_EVENT))
                        break;

                udelay(10);
        }
}

void tg3_write_mem(struct tg3 *tp, u32 off, u32 val)
{       DBGP("%s\n", __func__);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906 &&
            (off >= NIC_SRAM_STATS_BLK) && (off < NIC_SRAM_TX_BUFFER_DESC))
                return;

        pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_BASE_ADDR, off);
        pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_DATA, val);

        /* Always leave this as zero. */
        pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_BASE_ADDR, 0);
}

static void tg3_stop_fw(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        if (tg3_flag(tp, ENABLE_ASF) && !tg3_flag(tp, ENABLE_APE)) {
                /* Wait for RX cpu to ACK the previous event. */
                tg3_wait_for_event_ack(tp);

                tg3_write_mem(tp, NIC_SRAM_FW_CMD_MBOX, FWCMD_NICDRV_PAUSE_FW);

                tg3_generate_fw_event(tp);

                /* Wait for RX cpu to ACK this event. */
                tg3_wait_for_event_ack(tp);
        }
}

static void tg3_write_sig_pre_reset(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        tg3_write_mem(tp, NIC_SRAM_FIRMWARE_MBOX,
                      NIC_SRAM_FIRMWARE_MBOX_MAGIC1);
}

void tg3_disable_ints(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        tw32(TG3PCI_MISC_HOST_CTRL,
             (tp->misc_host_ctrl | MISC_HOST_CTRL_MASK_PCI_INT));

        tw32_mailbox_f(tp->int_mbox, 0x00000001);
}

void tg3_enable_ints(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        tw32(TG3PCI_MISC_HOST_CTRL,
             (tp->misc_host_ctrl & ~MISC_HOST_CTRL_MASK_PCI_INT));

        tp->coal_now = tp->coalesce_mode | HOSTCC_MODE_ENABLE;

        tw32_mailbox_f(tp->int_mbox, tp->last_tag << 24);

        /* Force an initial interrupt */
        if (!tg3_flag(tp, TAGGED_STATUS) &&
            (tp->hw_status->status & SD_STATUS_UPDATED))
                tw32(GRC_LOCAL_CTRL, tp->grc_local_ctrl | GRC_LCLCTRL_SETINT);
        else
                tw32(HOSTCC_MODE, tp->coal_now);
}

#define MAX_WAIT_CNT 1000

/* To stop a block, clear the enable bit and poll till it clears. */
static int tg3_stop_block(struct tg3 *tp, unsigned long ofs, u32 enable_bit)
{       DBGP("%s\n", __func__);

        unsigned int i;
        u32 val;

        if (tg3_flag(tp, 5705_PLUS)) {
                switch (ofs) {
                case RCVLSC_MODE:
                case DMAC_MODE:
                case MBFREE_MODE:
                case BUFMGR_MODE:
                case MEMARB_MODE:
                        /* We can't enable/disable these bits of the
                         * 5705/5750, just say success.
                         */
                        return 0;

                default:
                        break;
                }
        }

        val = tr32(ofs);
        val &= ~enable_bit;
        tw32_f(ofs, val);

        for (i = 0; i < MAX_WAIT_CNT; i++) {
                udelay(100);
                val = tr32(ofs);
                if ((val & enable_bit) == 0)
                        break;
        }

        if (i == MAX_WAIT_CNT) {
                DBGC(&tp->pdev->dev,
                        "tg3_stop_block timed out, ofs=%lx enable_bit=%x\n",
                        ofs, enable_bit);
                return -ENODEV;
        }

        return 0;
}

static int tg3_abort_hw(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        int i, err;

        tg3_disable_ints(tp);

        tp->rx_mode &= ~RX_MODE_ENABLE;
        tw32_f(MAC_RX_MODE, tp->rx_mode);
        udelay(10);

        err  = tg3_stop_block(tp, RCVBDI_MODE, RCVBDI_MODE_ENABLE);
        err |= tg3_stop_block(tp, RCVLPC_MODE, RCVLPC_MODE_ENABLE);
        err |= tg3_stop_block(tp, RCVLSC_MODE, RCVLSC_MODE_ENABLE);
        err |= tg3_stop_block(tp, RCVDBDI_MODE, RCVDBDI_MODE_ENABLE);
        err |= tg3_stop_block(tp, RCVDCC_MODE, RCVDCC_MODE_ENABLE);
        err |= tg3_stop_block(tp, RCVCC_MODE, RCVCC_MODE_ENABLE);

        err |= tg3_stop_block(tp, SNDBDS_MODE, SNDBDS_MODE_ENABLE);
        err |= tg3_stop_block(tp, SNDBDI_MODE, SNDBDI_MODE_ENABLE);
        err |= tg3_stop_block(tp, SNDDATAI_MODE, SNDDATAI_MODE_ENABLE);
        err |= tg3_stop_block(tp, RDMAC_MODE, RDMAC_MODE_ENABLE);
        err |= tg3_stop_block(tp, SNDDATAC_MODE, SNDDATAC_MODE_ENABLE);
        err |= tg3_stop_block(tp, DMAC_MODE, DMAC_MODE_ENABLE);
        err |= tg3_stop_block(tp, SNDBDC_MODE, SNDBDC_MODE_ENABLE);

        tp->mac_mode &= ~MAC_MODE_TDE_ENABLE;
        tw32_f(MAC_MODE, tp->mac_mode);
        udelay(40);

        tp->tx_mode &= ~TX_MODE_ENABLE;
        tw32_f(MAC_TX_MODE, tp->tx_mode);

        for (i = 0; i < MAX_WAIT_CNT; i++) {
                udelay(100);
                if (!(tr32(MAC_TX_MODE) & TX_MODE_ENABLE))
                        break;
        }
        if (i >= MAX_WAIT_CNT) {
                DBGC(&tp->pdev->dev,
                        "%s timed out, TX_MODE_ENABLE will not clear "
                        "MAC_TX_MODE=%08x\n", __func__, tr32(MAC_TX_MODE));
                err |= -ENODEV;
        }

        err |= tg3_stop_block(tp, HOSTCC_MODE, HOSTCC_MODE_ENABLE);
        err |= tg3_stop_block(tp, WDMAC_MODE, WDMAC_MODE_ENABLE);
        err |= tg3_stop_block(tp, MBFREE_MODE, MBFREE_MODE_ENABLE);

        tw32(FTQ_RESET, 0xffffffff);
        tw32(FTQ_RESET, 0x00000000);

        err |= tg3_stop_block(tp, BUFMGR_MODE, BUFMGR_MODE_ENABLE);
        err |= tg3_stop_block(tp, MEMARB_MODE, MEMARB_MODE_ENABLE);

        if (tp->hw_status)
                memset(tp->hw_status, 0, TG3_HW_STATUS_SIZE);

        return err;
}

void __tg3_set_mac_addr(struct tg3 *tp, int skip_mac_1)
{       DBGP("%s\n", __func__);

        u32 addr_high, addr_low;
        int i;

        addr_high = ((tp->dev->ll_addr[0] << 8) |
                     tp->dev->ll_addr[1]);
        addr_low = ((tp->dev->ll_addr[2] << 24) |
                    (tp->dev->ll_addr[3] << 16) |
                    (tp->dev->ll_addr[4] <<  8) |
                    (tp->dev->ll_addr[5] <<  0));
        for (i = 0; i < 4; i++) {
                if (i == 1 && skip_mac_1)
                        continue;
                tw32(MAC_ADDR_0_HIGH + (i * 8), addr_high);
                tw32(MAC_ADDR_0_LOW + (i * 8), addr_low);
        }

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5703 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704) {
                for (i = 0; i < 12; i++) {
                        tw32(MAC_EXTADDR_0_HIGH + (i * 8), addr_high);
                        tw32(MAC_EXTADDR_0_LOW + (i * 8), addr_low);
                }
        }

        addr_high = (tp->dev->ll_addr[0] +
                     tp->dev->ll_addr[1] +
                     tp->dev->ll_addr[2] +
                     tp->dev->ll_addr[3] +
                     tp->dev->ll_addr[4] +
                     tp->dev->ll_addr[5]) &
                TX_BACKOFF_SEED_MASK;
        tw32(MAC_TX_BACKOFF_SEED, addr_high);
}

/* Save PCI command register before chip reset */
static void tg3_save_pci_state(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        pci_read_config_word(tp->pdev, PCI_COMMAND, &tp->pci_cmd);
}

/* Restore PCI state after chip reset */
static void tg3_restore_pci_state(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        u32 val;

        /* Re-enable indirect register accesses. */
        pci_write_config_dword(tp->pdev, TG3PCI_MISC_HOST_CTRL,
                               tp->misc_host_ctrl);

        /* Set MAX PCI retry to zero. */
        val = (PCISTATE_ROM_ENABLE | PCISTATE_ROM_RETRY_ENABLE);
        if (tp->pci_chip_rev_id == CHIPREV_ID_5704_A0 &&
            tg3_flag(tp, PCIX_MODE))
                val |= PCISTATE_RETRY_SAME_DMA;

        pci_write_config_dword(tp->pdev, TG3PCI_PCISTATE, val);

        pci_write_config_word(tp->pdev, PCI_COMMAND, tp->pci_cmd);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785) {
                        pci_write_config_byte(tp->pdev, PCI_CACHE_LINE_SIZE,
                                              tp->pci_cacheline_sz);
                        pci_write_config_byte(tp->pdev, PCI_LATENCY_TIMER,
                                              tp->pci_lat_timer);
        }


        /* Make sure PCI-X relaxed ordering bit is clear. */
        if (tg3_flag(tp, PCIX_MODE)) {
                u16 pcix_cmd;

                pci_read_config_word(tp->pdev, tp->pcix_cap + PCI_X_CMD,
                                     &pcix_cmd);
                pcix_cmd &= ~PCI_X_CMD_ERO;
                pci_write_config_word(tp->pdev, tp->pcix_cap + PCI_X_CMD,
                                      pcix_cmd);
        }
}

static int tg3_poll_fw(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        int i;
        u32 val;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) {
                /* Wait up to 20ms for init done. */
                for (i = 0; i < 200; i++) {
                        if (tr32(VCPU_STATUS) & VCPU_STATUS_INIT_DONE)
                                return 0;
                        udelay(100);
                }
                return -ENODEV;
        }

        /* Wait for firmware initialization to complete. */
        for (i = 0; i < 100000; i++) {
                tg3_read_mem(tp, NIC_SRAM_FIRMWARE_MBOX, &val);
                if (val == (u32)~NIC_SRAM_FIRMWARE_MBOX_MAGIC1)
                        break;
                udelay(10);
        }

        /* Chip might not be fitted with firmware.  Some Sun onboard
         * parts are configured like that.  So don't signal the timeout
         * of the above loop as an error, but do report the lack of
         * running firmware once.
         */
        if (i >= 100000 && !tg3_flag(tp, NO_FWARE_REPORTED)) {
                tg3_flag_set(tp, NO_FWARE_REPORTED);

                DBGC(tp->dev, "No firmware running\n");
        }

        if (tp->pci_chip_rev_id == CHIPREV_ID_57765_A0) {
                /* The 57765 A0 needs a little more
                 * time to do some important work.
                 */
                mdelay(10);
        }

        return 0;
}

static int tg3_nvram_lock(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        if (tg3_flag(tp, NVRAM)) {
                int i;

                if (tp->nvram_lock_cnt == 0) {
                        tw32(NVRAM_SWARB, SWARB_REQ_SET1);
                        for (i = 0; i < 8000; i++) {
                                if (tr32(NVRAM_SWARB) & SWARB_GNT1)
                                        break;
                                udelay(20);
                        }
                        if (i == 8000) {
                                tw32(NVRAM_SWARB, SWARB_REQ_CLR1);
                                return -ENODEV;
                        }
                }
                tp->nvram_lock_cnt++;
        }
        return 0;
}

static void tg3_nvram_unlock(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        if (tg3_flag(tp, NVRAM)) {
                if (tp->nvram_lock_cnt > 0)
                        tp->nvram_lock_cnt--;
                if (tp->nvram_lock_cnt == 0)
                        tw32_f(NVRAM_SWARB, SWARB_REQ_CLR1);
        }
}

static int tg3_chip_reset(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        u32 val;
        int err;

        tg3_nvram_lock(tp);


        /* No matching tg3_nvram_unlock() after this because
         * chip reset below will undo the nvram lock.
         */
        tp->nvram_lock_cnt = 0;

        /* GRC_MISC_CFG core clock reset will clear the memory
         * enable bit in PCI register 4 and the MSI enable bit
         * on some chips, so we save relevant registers here.
         */
        tg3_save_pci_state(tp);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752 ||
            tg3_flag(tp, 5755_PLUS))
                tw32(GRC_FASTBOOT_PC, 0);

#if 0
        /*
         * We must avoid the readl() that normally takes place.
         * It locks machines, causes machine checks, and other
         * fun things.  So, temporarily disable the 5701
         * hardware workaround, while we do the reset.
         */
        write_op = tp->write32;
        if (write_op == tg3_write_flush_reg32)
                tp->write32 = tg3_write32;
#endif

        /* Prevent the irq handler from reading or writing PCI registers
         * during chip reset when the memory enable bit in the PCI command
         * register may be cleared.  The chip does not generate interrupt
         * at this time, but the irq handler may still be called due to irq
         * sharing or irqpoll.
         */
        tg3_flag_set(tp, CHIP_RESETTING);

        if (tp->hw_status) {
                tp->hw_status->status = 0;
                tp->hw_status->status_tag = 0;
        }
        tp->last_tag = 0;
        tp->last_irq_tag = 0;

        mb();

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780) {
                val = tr32(TG3_PCIE_LNKCTL) & ~TG3_PCIE_LNKCTL_L1_PLL_PD_EN;
                tw32(TG3_PCIE_LNKCTL, val | TG3_PCIE_LNKCTL_L1_PLL_PD_DIS);
        }

        /* do the reset */
        val = GRC_MISC_CFG_CORECLK_RESET;

        if (tg3_flag(tp, PCI_EXPRESS)) {
                /* Force PCIe 1.0a mode */
                if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785 &&
                    !tg3_flag(tp, 57765_PLUS) &&
                    tr32(TG3_PCIE_PHY_TSTCTL) ==
                    (TG3_PCIE_PHY_TSTCTL_PCIE10 | TG3_PCIE_PHY_TSTCTL_PSCRAM))
                        tw32(TG3_PCIE_PHY_TSTCTL, TG3_PCIE_PHY_TSTCTL_PSCRAM);

                if (tp->pci_chip_rev_id != CHIPREV_ID_5750_A0) {
                        tw32(GRC_MISC_CFG, (1 << 29));
                        val |= (1 << 29);
                }
        }

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) {
                tw32(VCPU_STATUS, tr32(VCPU_STATUS) | VCPU_STATUS_DRV_RESET);
                tw32(GRC_VCPU_EXT_CTRL,
                     tr32(GRC_VCPU_EXT_CTRL) & ~GRC_VCPU_EXT_CTRL_HALT_CPU);
        }

        /* Manage gphy power for all CPMU absent PCIe devices. */
        if (tg3_flag(tp, 5705_PLUS) && !tg3_flag(tp, CPMU_PRESENT))
                val |= GRC_MISC_CFG_KEEP_GPHY_POWER;

        tw32(GRC_MISC_CFG, val);

        /* Unfortunately, we have to delay before the PCI read back.
         * Some 575X chips even will not respond to a PCI cfg access
         * when the reset command is given to the chip.
         *
         * How do these hardware designers expect things to work
         * properly if the PCI write is posted for a long period
         * of time?  It is always necessary to have some method by
         * which a register read back can occur to push the write
         * out which does the reset.
         *
         * For most tg3 variants the trick below was working.
         * Ho hum...
         */
        udelay(120);

        /* Flush PCI posted writes.  The normal MMIO registers
         * are inaccessible at this time so this is the only
         * way to make this reliably (actually, this is no longer
         * the case, see above).  I tried to use indirect
         * register read/write but this upset some 5701 variants.
         */
        pci_read_config_dword(tp->pdev, PCI_COMMAND, &val);

        udelay(120);

        if (tg3_flag(tp, PCI_EXPRESS) && tp->pcie_cap) {
                u16 val16;

                if (tp->pci_chip_rev_id == CHIPREV_ID_5750_A0) {
                        int i;
                        u32 cfg_val;

                        /* Wait for link training to complete.  */
                        for (i = 0; i < 5000; i++)
                                udelay(100);

                        pci_read_config_dword(tp->pdev, 0xc4, &cfg_val);
                        pci_write_config_dword(tp->pdev, 0xc4,
                                               cfg_val | (1 << 15));
                }

                /* Clear the "no snoop" and "relaxed ordering" bits. */
                pci_read_config_word(tp->pdev,
                                     tp->pcie_cap + PCI_EXP_DEVCTL,
                                     &val16);
                val16 &= ~(PCI_EXP_DEVCTL_RELAX_EN |
                           PCI_EXP_DEVCTL_NOSNOOP_EN);
                /*
                 * Older PCIe devices only support the 128 byte
                 * MPS setting.  Enforce the restriction.
                 */
                if (!tg3_flag(tp, CPMU_PRESENT))
                        val16 &= ~PCI_EXP_DEVCTL_PAYLOAD;
                pci_write_config_word(tp->pdev,
                                      tp->pcie_cap + PCI_EXP_DEVCTL,
                                      val16);

                /* Clear error status */
                pci_write_config_word(tp->pdev,
                                      tp->pcie_cap + PCI_EXP_DEVSTA,
                                      PCI_EXP_DEVSTA_CED |
                                      PCI_EXP_DEVSTA_NFED |
                                      PCI_EXP_DEVSTA_FED |
                                      PCI_EXP_DEVSTA_URD);
        }

        tg3_restore_pci_state(tp);

        tg3_flag_clear(tp, CHIP_RESETTING);
        tg3_flag_clear(tp, ERROR_PROCESSED);

        val = 0;
        if (tg3_flag(tp, 5780_CLASS))
                val = tr32(MEMARB_MODE);
        tw32(MEMARB_MODE, val | MEMARB_MODE_ENABLE);

        if (tp->pci_chip_rev_id == CHIPREV_ID_5750_A3) {
                tg3_stop_fw(tp);
                tw32(0x5000, 0x400);
        }

        tw32(GRC_MODE, tp->grc_mode);

        if (tp->pci_chip_rev_id == CHIPREV_ID_5705_A0) {
                val = tr32(0xc4);

                tw32(0xc4, val | (1 << 15));
        }

        if ((tp->nic_sram_data_cfg & NIC_SRAM_DATA_CFG_MINI_PCI) != 0 &&
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705) {
                tp->pci_clock_ctrl |= CLOCK_CTRL_CLKRUN_OENABLE;
                if (tp->pci_chip_rev_id == CHIPREV_ID_5705_A0)
                        tp->pci_clock_ctrl |= CLOCK_CTRL_FORCE_CLKRUN;
                tw32(TG3PCI_CLOCK_CTRL, tp->pci_clock_ctrl);
        }

        if (tp->phy_flags & TG3_PHYFLG_PHY_SERDES) {
                tp->mac_mode |= MAC_MODE_PORT_MODE_TBI;
                val = tp->mac_mode;
        } else if (tp->phy_flags & TG3_PHYFLG_MII_SERDES) {
                tp->mac_mode |= MAC_MODE_PORT_MODE_GMII;
                val = tp->mac_mode;
        } else
                val = 0;

        tw32_f(MAC_MODE, val);
        udelay(40);

        err = tg3_poll_fw(tp);
        if (err)
                return err;

        if (tg3_flag(tp, PCI_EXPRESS) &&
            tp->pci_chip_rev_id != CHIPREV_ID_5750_A0 &&
            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785 &&
            !tg3_flag(tp, 57765_PLUS)) {
                val = tr32(0x7c00);

                tw32(0x7c00, val | (1 << 25));
        }

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720) {
                val = tr32(TG3_CPMU_CLCK_ORIDE);
                tw32(TG3_CPMU_CLCK_ORIDE, val & ~CPMU_CLCK_ORIDE_MAC_ORIDE_EN);
        }

        if (tg3_flag(tp, CPMU_PRESENT)) {
                tw32(TG3_CPMU_D0_CLCK_POLICY, 0);
                val = tr32(TG3_CPMU_CLCK_ORIDE_EN);
                tw32(TG3_CPMU_CLCK_ORIDE_EN,
                     val | CPMU_CLCK_ORIDE_MAC_CLCK_ORIDE_EN);
        }

        return 0;
}

int tg3_halt(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        int err;

        tg3_stop_fw(tp);

        tg3_write_sig_pre_reset(tp);

        tg3_abort_hw(tp);
        err = tg3_chip_reset(tp);

        __tg3_set_mac_addr(tp, 0);

        if (err)
                return err;

        return 0;
}

static int tg3_nvram_read_using_eeprom(struct tg3 *tp,
                                        u32 offset, u32 *val)
{       DBGP("%s\n", __func__);

        u32 tmp;
        int i;

        if (offset > EEPROM_ADDR_ADDR_MASK || (offset % 4) != 0)
                return -EINVAL;

        tmp = tr32(GRC_EEPROM_ADDR) & ~(EEPROM_ADDR_ADDR_MASK |
                                        EEPROM_ADDR_DEVID_MASK |
                                        EEPROM_ADDR_READ);
        tw32(GRC_EEPROM_ADDR,
             tmp |
             (0 << EEPROM_ADDR_DEVID_SHIFT) |
             ((offset << EEPROM_ADDR_ADDR_SHIFT) &
              EEPROM_ADDR_ADDR_MASK) |
             EEPROM_ADDR_READ | EEPROM_ADDR_START);

        for (i = 0; i < 1000; i++) {
                tmp = tr32(GRC_EEPROM_ADDR);

                if (tmp & EEPROM_ADDR_COMPLETE)
                        break;
                mdelay(1);
        }
        if (!(tmp & EEPROM_ADDR_COMPLETE))
                return -EBUSY;

        tmp = tr32(GRC_EEPROM_DATA);

        /*
         * The data will always be opposite the native endian
         * format.  Perform a blind byteswap to compensate.
         */
        *val = bswap_32(tmp);

        return 0;
}

static u32 tg3_nvram_phys_addr(struct tg3 *tp, u32 addr)
{       DBGP("%s\n", __func__);

        if (tg3_flag(tp, NVRAM) &&
            tg3_flag(tp, NVRAM_BUFFERED) &&
            tg3_flag(tp, FLASH) &&
            !tg3_flag(tp, NO_NVRAM_ADDR_TRANS) &&
            (tp->nvram_jedecnum == JEDEC_ATMEL))

                addr = ((addr / tp->nvram_pagesize) <<
                        ATMEL_AT45DB0X1B_PAGE_POS) +
                       (addr % tp->nvram_pagesize);

        return addr;
}

static void tg3_enable_nvram_access(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        if (tg3_flag(tp, 5750_PLUS) && !tg3_flag(tp, PROTECTED_NVRAM)) {
                u32 nvaccess = tr32(NVRAM_ACCESS);

                tw32(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);
        }
}

static void tg3_disable_nvram_access(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        if (tg3_flag(tp, 5750_PLUS) && !tg3_flag(tp, PROTECTED_NVRAM)) {
                u32 nvaccess = tr32(NVRAM_ACCESS);

                tw32(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);
        }
}

#define NVRAM_CMD_TIMEOUT 10000

static int tg3_nvram_exec_cmd(struct tg3 *tp, u32 nvram_cmd)
{       DBGP("%s\n", __func__);

        int i;

        tw32(NVRAM_CMD, nvram_cmd);
        for (i = 0; i < NVRAM_CMD_TIMEOUT; i++) {
                udelay(10);
                if (tr32(NVRAM_CMD) & NVRAM_CMD_DONE) {
                        udelay(10);
                        break;
                }
        }

        if (i == NVRAM_CMD_TIMEOUT)
                return -EBUSY;

        return 0;
}

/* NOTE: Data read in from NVRAM is byteswapped according to
 * the byteswapping settings for all other register accesses.
 * tg3 devices are BE devices, so on a BE machine, the data
 * returned will be exactly as it is seen in NVRAM.  On a LE
 * machine, the 32-bit value will be byteswapped.
 */
static int tg3_nvram_read(struct tg3 *tp, u32 offset, u32 *val)
{       DBGP("%s\n", __func__);

        int ret;

        if (!tg3_flag(tp, NVRAM))
                return tg3_nvram_read_using_eeprom(tp, offset, val);

        offset = tg3_nvram_phys_addr(tp, offset);

        if (offset > NVRAM_ADDR_MSK)
                return -EINVAL;

        ret = tg3_nvram_lock(tp);
        if (ret)
                return ret;

        tg3_enable_nvram_access(tp);

        tw32(NVRAM_ADDR, offset);
        ret = tg3_nvram_exec_cmd(tp, NVRAM_CMD_RD | NVRAM_CMD_GO |
                NVRAM_CMD_FIRST | NVRAM_CMD_LAST | NVRAM_CMD_DONE);

        if (ret == 0)
                *val = tr32(NVRAM_RDDATA);

        tg3_disable_nvram_access(tp);

        tg3_nvram_unlock(tp);

        return ret;
}

/* Ensures NVRAM data is in bytestream format. */
static int tg3_nvram_read_be32(struct tg3 *tp, u32 offset, u32 *val)
{       DBGP("%s\n", __func__);

        u32 v = 0;
        int res = tg3_nvram_read(tp, offset, &v);
        if (!res)
                *val = cpu_to_be32(v);
        return res;
}

int tg3_get_device_address(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        struct net_device *dev = tp->dev;
        u32 hi, lo, mac_offset;
        int addr_ok = 0;

        mac_offset = 0x7c;
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704 ||
            tg3_flag(tp, 5780_CLASS)) {
                if (tr32(TG3PCI_DUAL_MAC_CTRL) & DUAL_MAC_CTRL_ID)
                        mac_offset = 0xcc;
                if (tg3_nvram_lock(tp))
                        tw32_f(NVRAM_CMD, NVRAM_CMD_RESET);
                else
                        tg3_nvram_unlock(tp);
        } else if (tg3_flag(tp, 5717_PLUS)) {
                if (PCI_FUNC(tp->pdev->busdevfn) & 1)
                        mac_offset = 0xcc;
                if (PCI_FUNC(tp->pdev->busdevfn) > 1)
                        mac_offset += 0x18c;
        } else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
                mac_offset = 0x10;

        /* First try to get it from MAC address mailbox. */
        tg3_read_mem(tp, NIC_SRAM_MAC_ADDR_HIGH_MBOX, &hi);
        if ((hi >> 16) == 0x484b) {
                dev->hw_addr[0] = (hi >>  8) & 0xff;
                dev->hw_addr[1] = (hi >>  0) & 0xff;

                tg3_read_mem(tp, NIC_SRAM_MAC_ADDR_LOW_MBOX, &lo);
                dev->hw_addr[2] = (lo >> 24) & 0xff;
                dev->hw_addr[3] = (lo >> 16) & 0xff;
                dev->hw_addr[4] = (lo >>  8) & 0xff;
                dev->hw_addr[5] = (lo >>  0) & 0xff;

                /* Some old bootcode may report a 0 MAC address in SRAM */
                addr_ok = is_valid_ether_addr(&dev->hw_addr[0]);
        }
        if (!addr_ok) {
                /* Next, try NVRAM. */
                if (!tg3_flag(tp, NO_NVRAM) &&
                    !tg3_nvram_read_be32(tp, mac_offset + 0, &hi) &&
                    !tg3_nvram_read_be32(tp, mac_offset + 4, &lo)) {
                        memcpy(&dev->hw_addr[0], ((char *)&hi) + 2, 2);
                        memcpy(&dev->hw_addr[2], (char *)&lo, sizeof(lo));
                }
                /* Finally just fetch it out of the MAC control regs. */
                else {
                        hi = tr32(MAC_ADDR_0_HIGH);
                        lo = tr32(MAC_ADDR_0_LOW);

                        dev->hw_addr[5] = lo & 0xff;
                        dev->hw_addr[4] = (lo >> 8) & 0xff;
                        dev->hw_addr[3] = (lo >> 16) & 0xff;
                        dev->hw_addr[2] = (lo >> 24) & 0xff;
                        dev->hw_addr[1] = hi & 0xff;
                        dev->hw_addr[0] = (hi >> 8) & 0xff;
                }
        }

        if (!is_valid_ether_addr(&dev->hw_addr[0])) {
                return -EINVAL;
        }

        return 0;
}

static void __tg3_set_rx_mode(struct net_device *dev)
{       DBGP("%s\n", __func__);

        struct tg3 *tp = dev->priv;
        u32 rx_mode;

        rx_mode = tp->rx_mode & ~(RX_MODE_PROMISC |
                                  RX_MODE_KEEP_VLAN_TAG);

        rx_mode |= RX_MODE_KEEP_VLAN_TAG;

        /* Accept all multicast. */
        tw32(MAC_HASH_REG_0, 0xffffffff);
        tw32(MAC_HASH_REG_1, 0xffffffff);
        tw32(MAC_HASH_REG_2, 0xffffffff);
        tw32(MAC_HASH_REG_3, 0xffffffff);

        if (rx_mode != tp->rx_mode) {
                tp->rx_mode = rx_mode;
                tw32_f(MAC_RX_MODE, rx_mode);
                udelay(10);
        }
}

static void __tg3_set_coalesce(struct tg3 *tp)
{       DBGP("%s\n", __func__);


        tw32(HOSTCC_RXCOL_TICKS, 0);
        tw32(HOSTCC_TXCOL_TICKS, LOW_TXCOL_TICKS);
        tw32(HOSTCC_RXMAX_FRAMES, 1);
        /* FIXME: mix between TXMAX and RXMAX taken from legacy driver */
        tw32(HOSTCC_TXMAX_FRAMES, LOW_RXMAX_FRAMES);
        tw32(HOSTCC_RXCOAL_MAXF_INT, 1);
        tw32(HOSTCC_TXCOAL_MAXF_INT, 0);

        if (!tg3_flag(tp, 5705_PLUS)) {
                u32 val = DEFAULT_STAT_COAL_TICKS;

                tw32(HOSTCC_RXCOAL_TICK_INT, DEFAULT_RXCOAL_TICK_INT);
                tw32(HOSTCC_TXCOAL_TICK_INT, DEFAULT_TXCOAL_TICK_INT);

                if (!netdev_link_ok(tp->dev))
                        val = 0;

                tw32(HOSTCC_STAT_COAL_TICKS, val);
        }
}

static void tg3_set_bdinfo(struct tg3 *tp, u32 bdinfo_addr,
                           dma_addr_t mapping, u32 maxlen_flags,
                           u32 nic_addr)
{       DBGP("%s\n", __func__);

        tg3_write_mem(tp,
                      (bdinfo_addr + TG3_BDINFO_HOST_ADDR + TG3_64BIT_REG_HIGH),
                      ((u64) mapping >> 32));
        tg3_write_mem(tp,
                      (bdinfo_addr + TG3_BDINFO_HOST_ADDR + TG3_64BIT_REG_LOW),
                      ((u64) mapping & 0xffffffff));
        tg3_write_mem(tp,
                      (bdinfo_addr + TG3_BDINFO_MAXLEN_FLAGS),
                       maxlen_flags);

        if (!tg3_flag(tp, 5705_PLUS))
                tg3_write_mem(tp,
                              (bdinfo_addr + TG3_BDINFO_NIC_ADDR),
                              nic_addr);
}

static void tg3_rings_reset(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        int i;
        u32 txrcb, rxrcb, limit;

        /* Disable all transmit rings but the first. */
        if (!tg3_flag(tp, 5705_PLUS))
                limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 16;
        else if (tg3_flag(tp, 5717_PLUS))
                limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 4;
        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765)
                limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 2;
        else
                limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE;

        for (txrcb = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE;
             txrcb < limit; txrcb += TG3_BDINFO_SIZE)
                tg3_write_mem(tp, txrcb + TG3_BDINFO_MAXLEN_FLAGS,
                              BDINFO_FLAGS_DISABLED);


        /* Disable all receive return rings but the first. */
        if (tg3_flag(tp, 5717_PLUS))
                limit = NIC_SRAM_RCV_RET_RCB + TG3_BDINFO_SIZE * 17;
        else if (!tg3_flag(tp, 5705_PLUS))
                limit = NIC_SRAM_RCV_RET_RCB + TG3_BDINFO_SIZE * 16;
        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755 ||
                 GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765)
                limit = NIC_SRAM_RCV_RET_RCB + TG3_BDINFO_SIZE * 4;
        else
                limit = NIC_SRAM_RCV_RET_RCB + TG3_BDINFO_SIZE;

        for (rxrcb = NIC_SRAM_RCV_RET_RCB + TG3_BDINFO_SIZE;
             rxrcb < limit; rxrcb += TG3_BDINFO_SIZE)
                tg3_write_mem(tp, rxrcb + TG3_BDINFO_MAXLEN_FLAGS,
                              BDINFO_FLAGS_DISABLED);

        /* Disable interrupts */
        tw32_mailbox_f(tp->int_mbox, 1);

        tp->tx_prod = 0;
        tp->tx_cons = 0;
        tw32_mailbox(tp->prodmbox, 0);
        tw32_rx_mbox(tp->consmbox, 0);

        /* Make sure the NIC-based send BD rings are disabled. */
        if (!tg3_flag(tp, 5705_PLUS)) {
                u32 mbox = MAILBOX_SNDNIC_PROD_IDX_0 + TG3_64BIT_REG_LOW;
                for (i = 0; i < 16; i++)
                        tw32_tx_mbox(mbox + i * 8, 0);
        }

        txrcb = NIC_SRAM_SEND_RCB;
        rxrcb = NIC_SRAM_RCV_RET_RCB;

        /* Clear status block in ram. */
        memset(tp->hw_status, 0, TG3_HW_STATUS_SIZE);

        /* Set status block DMA address */
        tw32(HOSTCC_STATUS_BLK_HOST_ADDR + TG3_64BIT_REG_HIGH,
             ((u64) tp->status_mapping >> 32));
        tw32(HOSTCC_STATUS_BLK_HOST_ADDR + TG3_64BIT_REG_LOW,
             ((u64) tp->status_mapping & 0xffffffff));

        if (tp->tx_ring) {
                tg3_set_bdinfo(tp, txrcb, tp->tx_desc_mapping,
                               (TG3_TX_RING_SIZE <<
                                BDINFO_FLAGS_MAXLEN_SHIFT),
                               NIC_SRAM_TX_BUFFER_DESC);
                txrcb += TG3_BDINFO_SIZE;
        }

        /* FIXME: will TG3_RX_RET_MAX_SIZE_5705 work on all cards? */
        if (tp->rx_rcb) {
                tg3_set_bdinfo(tp, rxrcb, tp->rx_rcb_mapping,
                                TG3_RX_RET_MAX_SIZE_5705 <<
                                BDINFO_FLAGS_MAXLEN_SHIFT, 0);
                rxrcb += TG3_BDINFO_SIZE;
        }
}

static void tg3_setup_rxbd_thresholds(struct tg3 *tp)
{       DBGP("%s\n", __func__);

        u32 val, bdcache_maxcnt;

        if (!tg3_flag(tp, 5750_PLUS) ||
            tg3_flag(tp, 5780_CLASS) ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
                bdcache_maxcnt = TG3_SRAM_RX_STD_BDCACHE_SIZE_5700;
        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755 ||
                 GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5787)
                bdcache_maxcnt = TG3_SRAM_RX_STD_BDCACHE_SIZE_5755;
        else
                bdcache_maxcnt = TG3_SRAM_RX_STD_BDCACHE_SIZE_5906;


        /* NOTE: legacy driver uses RX_PENDING / 8, we only use 4 descriptors
         * for now, use / 4 so the result is > 0
         */
        val = TG3_DEF_RX_RING_PENDING / 4;
        tw32(RCVBDI_STD_THRESH, val);

        if (tg3_flag(tp, 57765_PLUS))
                tw32(STD_REPLENISH_LWM, bdcache_maxcnt);
}

static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
{       DBGP("%s\n", __func__);

        u32 val, rdmac_mode;
        int i, err, limit;
        struct tg3_rx_prodring_set *tpr = &tp->prodring;

        tg3_stop_fw(tp);

        tg3_write_sig_pre_reset(tp);

        if (tg3_flag(tp, INIT_COMPLETE))
                tg3_abort_hw(tp);

        if (reset_phy)
                tg3_phy_reset(tp);

        err = tg3_chip_reset(tp);
        if (err)
                return err;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780) {
                val = tr32(PCIE_PWR_MGMT_THRESH) & ~PCIE_PWR_MGMT_L1_THRESH_MSK;
                val |= PCIE_PWR_MGMT_EXT_ASPM_TMR_EN |
                       PCIE_PWR_MGMT_L1_THRESH_4MS;
                tw32(PCIE_PWR_MGMT_THRESH, val);

                val = tr32(TG3_PCIE_EIDLE_DELAY) & ~TG3_PCIE_EIDLE_DELAY_MASK;
                tw32(TG3_PCIE_EIDLE_DELAY, val | TG3_PCIE_EIDLE_DELAY_13_CLKS);

                tw32(TG3_CORR_ERR_STAT, TG3_CORR_ERR_STAT_CLEAR);

                val = tr32(TG3_PCIE_LNKCTL) & ~TG3_PCIE_LNKCTL_L1_PLL_PD_EN;
                tw32(TG3_PCIE_LNKCTL, val | TG3_PCIE_LNKCTL_L1_PLL_PD_DIS);
        }

        if (tg3_flag(tp, L1PLLPD_EN)) {
                u32 grc_mode = tr32(GRC_MODE);

                /* Access the lower 1K of PL PCIE block registers. */
                val = grc_mode & ~GRC_MODE_PCIE_PORT_MASK;
                tw32(GRC_MODE, val | GRC_MODE_PCIE_PL_SEL);

                val = tr32(TG3_PCIE_TLDLPL_PORT + TG3_PCIE_PL_LO_PHYCTL1);
                tw32(TG3_PCIE_TLDLPL_PORT + TG3_PCIE_PL_LO_PHYCTL1,
                     val | TG3_PCIE_PL_LO_PHYCTL1_L1PLLPD_EN);

                tw32(GRC_MODE, grc_mode);
        }

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765) {
                if (tp->pci_chip_rev_id == CHIPREV_ID_57765_A0) {
                        u32 grc_mode = tr32(GRC_MODE);

                        /* Access the lower 1K of PL PCIE block registers. */
                        val = grc_mode & ~GRC_MODE_PCIE_PORT_MASK;
                        tw32(GRC_MODE, val | GRC_MODE_PCIE_PL_SEL);

                        val = tr32(TG3_PCIE_TLDLPL_PORT +
                                   TG3_PCIE_PL_LO_PHYCTL5);
                        tw32(TG3_PCIE_TLDLPL_PORT + TG3_PCIE_PL_LO_PHYCTL5,
                             val | TG3_PCIE_PL_LO_PHYCTL5_DIS_L2CLKREQ);

                        tw32(GRC_MODE, grc_mode);
                }

                if (GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_57765_AX) {
                        u32 grc_mode = tr32(GRC_MODE);

                        /* Access the lower 1K of DL PCIE block registers. */
                        val = grc_mode & ~GRC_MODE_PCIE_PORT_MASK;
                        tw32(GRC_MODE, val | GRC_MODE_PCIE_DL_SEL);

                        val = tr32(TG3_PCIE_TLDLPL_PORT +
                                   TG3_PCIE_DL_LO_FTSMAX);
                        val &= ~TG3_PCIE_DL_LO_FTSMAX_MSK;
                        tw32(TG3_PCIE_TLDLPL_PORT + TG3_PCIE_DL_LO_FTSMAX,
                             val | TG3_PCIE_DL_LO_FTSMAX_VAL);

                        tw32(GRC_MODE, grc_mode);
                }

                val = tr32(TG3_CPMU_LSPD_10MB_CLK);
                val &= ~CPMU_LSPD_10MB_MACCLK_MASK;
                val |= CPMU_LSPD_10MB_MACCLK_6_25;
                tw32(TG3_CPMU_LSPD_10MB_CLK, val);
        }

        /* This works around an issue with Athlon chipsets on
         * B3 tigon3 silicon.  This bit has no effect on any
         * other revision.  But do not set this on PCI Express
         * chips and don't even touch the clocks if the CPMU is present.
         */
        if (!tg3_flag(tp, CPMU_PRESENT)) {
                if (!tg3_flag(tp, PCI_EXPRESS))
                        tp->pci_clock_ctrl |= CLOCK_CTRL_DELAY_PCI_GRANT;
                tw32_f(TG3PCI_CLOCK_CTRL, tp->pci_clock_ctrl);
        }

        if (tp->pci_chip_rev_id == CHIPREV_ID_5704_A0 &&
            tg3_flag(tp, PCIX_MODE)) {
                val = tr32(TG3PCI_PCISTATE);
                val |= PCISTATE_RETRY_SAME_DMA;
                tw32(TG3PCI_PCISTATE, val);
        }

        if (GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5704_BX) {
                /* Enable some hw fixes.  */
                val = tr32(TG3PCI_MSI_DATA);
                val |= (1 << 26) | (1 << 28) | (1 << 29);
                tw32(TG3PCI_MSI_DATA, val);
        }

        /* Descriptor ring init may make accesses to the
         * NIC SRAM area to setup the TX descriptors, so we
         * can only do this after the hardware has been
         * successfully reset.
         */
        err = tg3_init_rings(tp);
        if (err)
                return err;

        if (tg3_flag(tp, 57765_PLUS)) {
                val = tr32(TG3PCI_DMA_RW_CTRL) &
                      ~DMA_RWCTRL_DIS_CACHE_ALIGNMENT;
                if (tp->pci_chip_rev_id == CHIPREV_ID_57765_A0)
                        val &= ~DMA_RWCTRL_CRDRDR_RDMA_MRRS_MSK;
                if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_57765 &&
                    GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5717)
                        val |= DMA_RWCTRL_TAGGED_STAT_WA;
                tw32(TG3PCI_DMA_RW_CTRL, val | tp->dma_rwctrl);
        } else if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5784 &&
                   GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5761) {
                /* This value is determined during the probe time DMA
                 * engine test, tg3_test_dma.
                 */
                tw32(TG3PCI_DMA_RW_CTRL, tp->dma_rwctrl);
        }

        tp->grc_mode &= ~(GRC_MODE_HOST_SENDBDS |
                          GRC_MODE_4X_NIC_SEND_RINGS |
                          GRC_MODE_NO_TX_PHDR_CSUM |
                          GRC_MODE_NO_RX_PHDR_CSUM);
        tp->grc_mode |= GRC_MODE_HOST_SENDBDS;
        tp->grc_mode |= GRC_MODE_NO_RX_PHDR_CSUM;

        /* Pseudo-header checksum is done by hardware logic and not
         * the offload processers, so make the chip do the pseudo-
         * header checksums on receive.  For transmit it is more
         * convenient to do the pseudo-header checksum in software
         * as Linux does that on transmit for us in all cases.
         */
        tp->grc_mode |= GRC_MODE_NO_TX_PHDR_CSUM;

        tw32(GRC_MODE,
             tp->grc_mode |
             (GRC_MODE_IRQ_ON_MAC_ATTN | GRC_MODE_HOST_STACKUP));

        /* Setup the timer prescalar register.  Clock is always 66Mhz. */
        val = tr32(GRC_MISC_CFG);
        val &= ~0xff;
        val |= (65 << GRC_MISC_CFG_PRESCALAR_SHIFT);
        tw32(GRC_MISC_CFG, val);

        /* Initialize MBUF/DESC pool. */
        if (tg3_flag(tp, 5750_PLUS)) {
                /* Do nothing.  */
        } else if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5705) {
                tw32(BUFMGR_MB_POOL_ADDR, NIC_SRAM_MBUF_POOL_BASE);
                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704)
                        tw32(BUFMGR_MB_POOL_SIZE, NIC_SRAM_MBUF_POOL_SIZE64);
                else
                        tw32(BUFMGR_MB_POOL_SIZE, NIC_SRAM_MBUF_POOL_SIZE96);
                tw32(BUFMGR_DMA_DESC_POOL_ADDR, NIC_SRAM_DMA_DESC_POOL_BASE);
                tw32(BUFMGR_DMA_DESC_POOL_SIZE, NIC_SRAM_DMA_DESC_POOL_SIZE);
        }

        tw32(BUFMGR_MB_RDMA_LOW_WATER,
             tp->bufmgr_config.mbuf_read_dma_low_water);
        tw32(BUFMGR_MB_MACRX_LOW_WATER,
             tp->bufmgr_config.mbuf_mac_rx_low_water);
        tw32(BUFMGR_MB_HIGH_WATER,
             tp->bufmgr_config.mbuf_high_water);

        tw32(BUFMGR_DMA_LOW_WATER,
             tp->bufmgr_config.dma_low_water);
        tw32(BUFMGR_DMA_HIGH_WATER,
             tp->bufmgr_config.dma_high_water);

        val = BUFMGR_MODE_ENABLE | BUFMGR_MODE_ATTN_ENABLE;
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719)
                val |= BUFMGR_MODE_NO_TX_UNDERRUN;
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717 ||
            tp->pci_chip_rev_id == CHIPREV_ID_5719_A0 ||
            tp->pci_chip_rev_id == CHIPREV_ID_5720_A0)
                val |= BUFMGR_MODE_MBLOW_ATTN_ENAB;
        tw32(BUFMGR_MODE, val);
        for (i = 0; i < 2000; i++) {
                if (tr32(BUFMGR_MODE) & BUFMGR_MODE_ENABLE)
                        break;
                udelay(10);
        }
        if (i >= 2000) {
                DBGC(tp->dev, "%s cannot enable BUFMGR\n", __func__);
                return -ENODEV;
        }

        if (tp->pci_chip_rev_id == CHIPREV_ID_5906_A1)
                tw32(ISO_PKT_TX, (tr32(ISO_PKT_TX) & ~0x3) | 0x2);

        tg3_setup_rxbd_thresholds(tp);

        /* Initialize TG3_BDINFO's at:
         *  RCVDBDI_STD_BD:     standard eth size rx ring
         *  RCVDBDI_JUMBO_BD:   jumbo frame rx ring
         *  RCVDBDI_MINI_BD:    small frame rx ring (??? does not work)
         *
         * like so:
         *  TG3_BDINFO_HOST_ADDR:       high/low parts of DMA address of ring
         *  TG3_BDINFO_MAXLEN_FLAGS:    (rx max buffer size << 16) |
         *                              ring attribute flags
         *  TG3_BDINFO_NIC_ADDR:        location of descriptors in nic SRAM
         *
         * Standard receive ring @ NIC_SRAM_RX_BUFFER_DESC, 512 entries.
         * Jumbo receive ring @ NIC_SRAM_RX_JUMBO_BUFFER_DESC, 256 entries.
         *
         * The size of each ring is fixed in the firmware, but the location is
         * configurable.
         */
        tw32(RCVDBDI_STD_BD + TG3_BDINFO_HOST_ADDR + TG3_64BIT_REG_HIGH,
             ((u64) tpr->rx_std_mapping >> 32));
        tw32(RCVDBDI_STD_BD + TG3_BDINFO_HOST_ADDR + TG3_64BIT_REG_LOW,
             ((u64) tpr->rx_std_mapping & 0xffffffff));
        if (!tg3_flag(tp, 5717_PLUS))
                tw32(RCVDBDI_STD_BD + TG3_BDINFO_NIC_ADDR,
                     NIC_SRAM_RX_BUFFER_DESC);

        /* Disable the mini ring */
        if (!tg3_flag(tp, 5705_PLUS))
                tw32(RCVDBDI_MINI_BD + TG3_BDINFO_MAXLEN_FLAGS,
                     BDINFO_FLAGS_DISABLED);

        val = TG3_RX_STD_MAX_SIZE_5700 << BDINFO_FLAGS_MAXLEN_SHIFT;

        if (tg3_flag(tp, 57765_PLUS))
                val |= (RX_STD_MAX_SIZE << 2);

        tw32(RCVDBDI_STD_BD + TG3_BDINFO_MAXLEN_FLAGS, val);

        tpr->rx_std_prod_idx = 0;

        /* std prod index is updated by tg3_refill_prod_ring() */
        tw32_rx_mbox(TG3_RX_STD_PROD_IDX_REG, 0);
        tw32_rx_mbox(TG3_RX_JMB_PROD_IDX_REG, 0);

        tg3_rings_reset(tp);

        __tg3_set_mac_addr(tp,0);

#define TG3_MAX_MTU     1522
        /* MTU + ethernet header + FCS + optional VLAN tag */
        tw32(MAC_RX_MTU_SIZE, TG3_MAX_MTU);

        /* The slot time is changed by tg3_setup_phy if we
         * run at gigabit with half duplex.
         */
        val = (2 << TX_LENGTHS_IPG_CRS_SHIFT) |
              (6 << TX_LENGTHS_IPG_SHIFT) |
              (32 << TX_LENGTHS_SLOT_TIME_SHIFT);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720)
                val |= tr32(MAC_TX_LENGTHS) &
                       (TX_LENGTHS_JMB_FRM_LEN_MSK |
                        TX_LENGTHS_CNT_DWN_VAL_MSK);

        tw32(MAC_TX_LENGTHS, val);

        /* Receive rules. */
        tw32(MAC_RCV_RULE_CFG, RCV_RULE_CFG_DEFAULT_CLASS);
        tw32(RCVLPC_CONFIG, 0x0181);

        /* Calculate RDMAC_MODE setting early, we need it to determine
         * the RCVLPC_STATE_ENABLE mask.
         */
        rdmac_mode = (RDMAC_MODE_ENABLE | RDMAC_MODE_TGTABORT_ENAB |
                      RDMAC_MODE_MSTABORT_ENAB | RDMAC_MODE_PARITYERR_ENAB |
                      RDMAC_MODE_ADDROFLOW_ENAB | RDMAC_MODE_FIFOOFLOW_ENAB |
                      RDMAC_MODE_FIFOURUN_ENAB | RDMAC_MODE_FIFOOREAD_ENAB |
                      RDMAC_MODE_LNGREAD_ENAB);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717)
                rdmac_mode |= RDMAC_MODE_MULT_DMA_RD_DIS;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780)
                rdmac_mode |= RDMAC_MODE_BD_SBD_CRPT_ENAB |
                              RDMAC_MODE_MBUF_RBD_CRPT_ENAB |
                              RDMAC_MODE_MBUF_SBD_CRPT_ENAB;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705 &&
            tp->pci_chip_rev_id != CHIPREV_ID_5705_A0) {
                if (tg3_flag(tp, TSO_CAPABLE) &&
                    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705) {
                        rdmac_mode |= RDMAC_MODE_FIFO_SIZE_128;
                } else if (!(tr32(TG3PCI_PCISTATE) & PCISTATE_BUS_SPEED_HIGH) &&
                           !tg3_flag(tp, IS_5788)) {
                        rdmac_mode |= RDMAC_MODE_FIFO_LONG_BURST;
                }
        }

        if (tg3_flag(tp, PCI_EXPRESS))
                rdmac_mode |= RDMAC_MODE_FIFO_LONG_BURST;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720)
                rdmac_mode |= tr32(RDMAC_MODE) & RDMAC_MODE_H2BNC_VLAN_DET;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 ||
            tg3_flag(tp, 57765_PLUS)) {
                val = tr32(TG3_RDMA_RSRVCTRL_REG);
                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719 ||
                    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720) {
                        val &= ~(TG3_RDMA_RSRVCTRL_TXMRGN_MASK |
                                 TG3_RDMA_RSRVCTRL_FIFO_LWM_MASK |
                                 TG3_RDMA_RSRVCTRL_FIFO_HWM_MASK);
                        val |= TG3_RDMA_RSRVCTRL_TXMRGN_320B |
                               TG3_RDMA_RSRVCTRL_FIFO_LWM_1_5K |
                               TG3_RDMA_RSRVCTRL_FIFO_HWM_1_5K;
                }
                tw32(TG3_RDMA_RSRVCTRL_REG,
                     val | TG3_RDMA_RSRVCTRL_FIFO_OFLW_FIX);
        }

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720) {
                val = tr32(TG3_LSO_RD_DMA_CRPTEN_CTRL);
                tw32(TG3_LSO_RD_DMA_CRPTEN_CTRL, val |
                     TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_BD_4K |
                     TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_LSO_4K);
        }

        /* Receive/send statistics. */
        if (tg3_flag(tp, 5750_PLUS)) {
                val = tr32(RCVLPC_STATS_ENABLE);
                val &= ~RCVLPC_STATSENAB_DACK_FIX;
                tw32(RCVLPC_STATS_ENABLE, val);
        } else if ((rdmac_mode & RDMAC_MODE_FIFO_SIZE_128) &&
                   tg3_flag(tp, TSO_CAPABLE)) {
                val = tr32(RCVLPC_STATS_ENABLE);
                val &= ~RCVLPC_STATSENAB_LNGBRST_RFIX;
                tw32(RCVLPC_STATS_ENABLE, val);
        } else {
                tw32(RCVLPC_STATS_ENABLE, 0xffffff);
        }
        tw32(RCVLPC_STATSCTRL, RCVLPC_STATSCTRL_ENABLE);
        tw32(SNDDATAI_STATSENAB, 0xffffff);
        tw32(SNDDATAI_STATSCTRL,
             (SNDDATAI_SCTRL_ENABLE |
              SNDDATAI_SCTRL_FASTUPD));

        /* Setup host coalescing engine. */
        tw32(HOSTCC_MODE, 0);
        for (i = 0; i < 2000; i++) {
                if (!(tr32(HOSTCC_MODE) & HOSTCC_MODE_ENABLE))
                        break;
                udelay(10);
        }

        __tg3_set_coalesce(tp);

        if (!tg3_flag(tp, 5705_PLUS)) {
                /* Status/statistics block address.  See tg3_timer,
                 * the tg3_periodic_fetch_stats call there, and
                 * tg3_get_stats to see how this works for 5705/5750 chips.
                 * NOTE: stats block removed for iPXE
                 */
                tw32(HOSTCC_STATUS_BLK_NIC_ADDR, NIC_SRAM_STATUS_BLK);

                /* Clear statistics and status block memory areas */
                for (i = NIC_SRAM_STATS_BLK;
                     i < NIC_SRAM_STATUS_BLK + TG3_HW_STATUS_SIZE;
                     i += sizeof(u32)) {
                        tg3_write_mem(tp, i, 0);
                        udelay(40);
                }
        }

        tw32(HOSTCC_MODE, HOSTCC_MODE_ENABLE | tp->coalesce_mode);

        tw32(RCVCC_MODE, RCVCC_MODE_ENABLE | RCVCC_MODE_ATTN_ENABLE);
        tw32(RCVLPC_MODE, RCVLPC_MODE_ENABLE);
        if (!tg3_flag(tp, 5705_PLUS))
                tw32(RCVLSC_MODE, RCVLSC_MODE_ENABLE | RCVLSC_MODE_ATTN_ENABLE);

        if (tp->phy_flags & TG3_PHYFLG_MII_SERDES) {
                tp->phy_flags &= ~TG3_PHYFLG_PARALLEL_DETECT;
                /* reset to prevent losing 1st rx packet intermittently */
                tw32_f(MAC_RX_MODE, RX_MODE_RESET);
                udelay(10);
        }

        if (tg3_flag(tp, ENABLE_APE))
                tp->mac_mode = MAC_MODE_APE_TX_EN | MAC_MODE_APE_RX_EN;
        else
                tp->mac_mode = 0;
        tp->mac_mode |= MAC_MODE_TXSTAT_ENABLE | MAC_MODE_RXSTAT_ENABLE |
                MAC_MODE_TDE_ENABLE | MAC_MODE_RDE_ENABLE | MAC_MODE_FHDE_ENABLE;
        if (!tg3_flag(tp, 5705_PLUS) &&
            !(tp->phy_flags & TG3_PHYFLG_PHY_SERDES) &&
            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5700)
                tp->mac_mode |= MAC_MODE_LINK_POLARITY;
        tw32_f(MAC_MODE, tp->mac_mode | MAC_MODE_RXSTAT_CLEAR | MAC_MODE_TXSTAT_CLEAR);
        udelay(40);

        /* tp->grc_local_ctrl is partially set up during tg3_get_invariants().
         * If TG3_FLAG_IS_NIC is zero, we should read the
         * register to preserve the GPIO settings for LOMs. The GPIOs,
         * whether used as inputs or outputs, are set by boot code after
         * reset.
         */
        if (!tg3_flag(tp, IS_NIC)) {
                u32 gpio_mask;

                gpio_mask = GRC_LCLCTRL_GPIO_OE0 | GRC_LCLCTRL_GPIO_OE1 |
                            GRC_LCLCTRL_GPIO_OE2 | GRC_LCLCTRL_GPIO_OUTPUT0 |
                            GRC_LCLCTRL_GPIO_OUTPUT1 | GRC_LCLCTRL_GPIO_OUTPUT2;

                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
                        gpio_mask |= GRC_LCLCTRL_GPIO_OE3 |
                                     GRC_LCLCTRL_GPIO_OUTPUT3;

                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755)
                        gpio_mask |= GRC_LCLCTRL_GPIO_UART_SEL;

                tp->grc_local_ctrl &= ~gpio_mask;
                tp->grc_local_ctrl |= tr32(GRC_LOCAL_CTRL) & gpio_mask;

                /* GPIO1 must be driven high for eeprom write protect */
                if (tg3_flag(tp, EEPROM_WRITE_PROT))
                        tp->grc_local_ctrl |= (GRC_LCLCTRL_GPIO_OE1 |
                                               GRC_LCLCTRL_GPIO_OUTPUT1);
        }
        tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl);
        udelay(100);

        if (!tg3_flag(tp, 5705_PLUS)) {
                tw32_f(DMAC_MODE, DMAC_MODE_ENABLE);
                udelay(40);
        }

        val = (WDMAC_MODE_ENABLE | WDMAC_MODE_TGTABORT_ENAB |
               WDMAC_MODE_MSTABORT_ENAB | WDMAC_MODE_PARITYERR_ENAB |
               WDMAC_MODE_ADDROFLOW_ENAB | WDMAC_MODE_FIFOOFLOW_ENAB |
               WDMAC_MODE_FIFOURUN_ENAB | WDMAC_MODE_FIFOOREAD_ENAB |
               WDMAC_MODE_LNGREAD_ENAB);

        /* Enable host coalescing bug fix */
        if (tg3_flag(tp, 5755_PLUS))
                val |= WDMAC_MODE_STATUS_TAG_FIX;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785)
                val |= WDMAC_MODE_BURST_ALL_DATA;

        tw32_f(WDMAC_MODE, val);
        udelay(40);

        if (tg3_flag(tp, PCIX_MODE)) {
                u16 pcix_cmd;

                pci_read_config_word(tp->pdev, tp->pcix_cap + PCI_X_CMD,
                                     &pcix_cmd);
                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5703) {
                        pcix_cmd &= ~PCI_X_CMD_MAX_READ;
                        pcix_cmd |= PCI_X_CMD_READ_2K;
                } else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704) {
                        pcix_cmd &= ~(PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ);
                        pcix_cmd |= PCI_X_CMD_READ_2K;
                }
                pci_write_config_word(tp->pdev, tp->pcix_cap + PCI_X_CMD,
                                      pcix_cmd);
        }

        tw32_f(RDMAC_MODE, rdmac_mode);
        udelay(40);

        tw32(RCVDCC_MODE, RCVDCC_MODE_ENABLE | RCVDCC_MODE_ATTN_ENABLE);
        if (!tg3_flag(tp, 5705_PLUS))
                tw32(MBFREE_MODE, MBFREE_MODE_ENABLE);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761)
                tw32(SNDDATAC_MODE,
                     SNDDATAC_MODE_ENABLE | SNDDATAC_MODE_CDELAY);
        else
                tw32(SNDDATAC_MODE, SNDDATAC_MODE_ENABLE);

        tw32(SNDBDC_MODE, SNDBDC_MODE_ENABLE | SNDBDC_MODE_ATTN_ENABLE);
        tw32(RCVBDI_MODE, RCVBDI_MODE_ENABLE | RCVBDI_MODE_RCB_ATTN_ENAB);
        val = RCVDBDI_MODE_ENABLE | RCVDBDI_MODE_INV_RING_SZ;
        if (tg3_flag(tp, LRG_PROD_RING_CAP))
                val |= RCVDBDI_MODE_LRG_RING_SZ;
        tw32(RCVDBDI_MODE, val);
        tw32(SNDDATAI_MODE, SNDDATAI_MODE_ENABLE);

        val = SNDBDI_MODE_ENABLE | SNDBDI_MODE_ATTN_ENABLE;
        if (tg3_flag(tp, ENABLE_TSS))
                val |= SNDBDI_MODE_MULTI_TXQ_EN;
        tw32(SNDBDI_MODE, val);
        tw32(SNDBDS_MODE, SNDBDS_MODE_ENABLE | SNDBDS_MODE_ATTN_ENABLE);


        /* FIXME: 5701 firmware fix? */
#if 0
        if (tp->pci_chip_rev_id == CHIPREV_ID_5701_A0) {
                err = tg3_load_5701_a0_firmware_fix(tp);
                if (err)
                        return err;
        }
#endif

        tp->tx_mode = TX_MODE_ENABLE;

        if (tg3_flag(tp, 5755_PLUS) ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
                tp->tx_mode |= TX_MODE_MBUF_LOCKUP_FIX;

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720) {
                val = TX_MODE_JMB_FRM_LEN | TX_MODE_CNT_DN_MODE;
                tp->tx_mode &= ~val;
                tp->tx_mode |= tr32(MAC_TX_MODE) & val;
        }

        tw32_f(MAC_TX_MODE, tp->tx_mode);
        udelay(100);

        tp->rx_mode = RX_MODE_ENABLE;

        tw32_f(MAC_RX_MODE, tp->rx_mode);
        udelay(10);

        tw32(MAC_LED_CTRL, tp->led_ctrl);

        tw32(MAC_MI_STAT, MAC_MI_STAT_LNKSTAT_ATTN_ENAB);
        if (tp->phy_flags & TG3_PHYFLG_PHY_SERDES) {
                tw32_f(MAC_RX_MODE, RX_MODE_RESET);
                udelay(10);
        }
        tw32_f(MAC_RX_MODE, tp->rx_mode);
        udelay(10);

        if (tp->phy_flags & TG3_PHYFLG_PHY_SERDES) {
                if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704) &&
                        !(tp->phy_flags & TG3_PHYFLG_SERDES_PREEMPHASIS)) {
                        /* Set drive transmission level to 1.2V  */
                        /* only if the signal pre-emphasis bit is not set  */
                        val = tr32(MAC_SERDES_CFG);
                        val &= 0xfffff000;
                        val |= 0x880;
                        tw32(MAC_SERDES_CFG, val);
                }
                if (tp->pci_chip_rev_id == CHIPREV_ID_5703_A1)
                        tw32(MAC_SERDES_CFG, 0x616000);
        }

        /* Prevent chip from dropping frames when flow control
         * is enabled.
         */
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765)
                val = 1;
        else
                val = 2;
        tw32_f(MAC_LOW_WMARK_MAX_RX_FRAME, val);

        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704 &&
            (tp->phy_flags & TG3_PHYFLG_PHY_SERDES)) {
                /* Use hardware link auto-negotiation */
                tg3_flag_set(tp, HW_AUTONEG);
        }

        if ((tp->phy_flags & TG3_PHYFLG_MII_SERDES) &&
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5714) {
                u32 tmp;

                tmp = tr32(SERDES_RX_CTRL);
                tw32(SERDES_RX_CTRL, tmp | SERDES_RX_SIG_DETECT);
                tp->grc_local_ctrl &= ~GRC_LCLCTRL_USE_EXT_SIG_DETECT;
                tp->grc_local_ctrl |= GRC_LCLCTRL_USE_SIG_DETECT;
                tw32(GRC_LOCAL_CTRL, tp->grc_local_ctrl);
        }

        err = tg3_setup_phy(tp, 0);
        if (err)
                return err;

        if (!(tp->phy_flags & TG3_PHYFLG_PHY_SERDES) &&
            !(tp->phy_flags & TG3_PHYFLG_IS_FET)) {
                u32 tmp;

                /* Clear CRC stats. */
                if (!tg3_readphy(tp, MII_TG3_TEST1, &tmp)) {
                        tg3_writephy(tp, MII_TG3_TEST1,
                                     tmp | MII_TG3_TEST1_CRC_EN);
                        tg3_readphy(tp, MII_TG3_RXR_COUNTERS, &tmp);
                }
        }

        __tg3_set_rx_mode(tp->dev);

        /* Initialize receive rules. */
        tw32(MAC_RCV_RULE_0,  0xc2000000 & RCV_RULE_DISABLE_MASK);
        tw32(MAC_RCV_VALUE_0, 0xffffffff & RCV_RULE_DISABLE_MASK);
        tw32(MAC_RCV_RULE_1,  0x86000004 & RCV_RULE_DISABLE_MASK);
        tw32(MAC_RCV_VALUE_1, 0xffffffff & RCV_RULE_DISABLE_MASK);

        if (tg3_flag(tp, 5705_PLUS) && !tg3_flag(tp, 5780_CLASS))
                limit = 8;
        else
                limit = 16;
        if (tg3_flag(tp, ENABLE_ASF))
                limit -= 4;
        switch (limit) {
        case 16:
                tw32(MAC_RCV_RULE_15,  0); tw32(MAC_RCV_VALUE_15,  0);
                /* Fall through */
        case 15:
                tw32(MAC_RCV_RULE_14,  0); tw32(MAC_RCV_VALUE_14,  0);
                /* Fall through */
        case 14:
                tw32(MAC_RCV_RULE_13,  0); tw32(MAC_RCV_VALUE_13,  0);
                /* Fall through */
        case 13:
                tw32(MAC_RCV_RULE_12,  0); tw32(MAC_RCV_VALUE_12,  0);
                /* Fall through */
        case 12:
                tw32(MAC_RCV_RULE_11,  0); tw32(MAC_RCV_VALUE_11,  0);
                /* Fall through */
        case 11:
                tw32(MAC_RCV_RULE_10,  0); tw32(MAC_RCV_VALUE_10,  0);
                /* Fall through */
        case 10:
                tw32(MAC_RCV_RULE_9,  0); tw32(MAC_RCV_VALUE_9,  0);
                /* Fall through */
        case 9:
                tw32(MAC_RCV_RULE_8,  0); tw32(MAC_RCV_VALUE_8,  0);
                /* Fall through */
        case 8:
                tw32(MAC_RCV_RULE_7,  0); tw32(MAC_RCV_VALUE_7,  0);
                /* Fall through */
        case 7:
                tw32(MAC_RCV_RULE_6,  0); tw32(MAC_RCV_VALUE_6,  0);
                /* Fall through */
        case 6:
                tw32(MAC_RCV_RULE_5,  0); tw32(MAC_RCV_VALUE_5,  0);
                /* Fall through */
        case 5:
                tw32(MAC_RCV_RULE_4,  0); tw32(MAC_RCV_VALUE_4,  0);
                /* Fall through */
        case 4:
                /* tw32(MAC_RCV_RULE_3,  0); tw32(MAC_RCV_VALUE_3,  0); */
        case 3:
                /* tw32(MAC_RCV_RULE_2,  0); tw32(MAC_RCV_VALUE_2,  0); */
        case 2:
        case 1:

        default:
                break;
        }

        return 0;
}

/* Called at device open time to get the chip ready for
 * packet processing.  Invoked with tp->lock held.
 */
int tg3_init_hw(struct tg3 *tp, int reset_phy)
{       DBGP("%s\n", __func__);

        tg3_switch_clocks(tp);

        tw32(TG3PCI_MEM_WIN_BASE_ADDR, 0);

        return tg3_reset_hw(tp, reset_phy);
}

void tg3_set_txd(struct tg3 *tp, int entry,
                        dma_addr_t mapping, int len, u32 flags)
{       DBGP("%s\n", __func__);

        struct tg3_tx_buffer_desc *txd = &tp->tx_ring[entry];

        txd->addr_hi = ((u64) mapping >> 32);
        txd->addr_lo = ((u64) mapping & 0xffffffff);
        txd->len_flags = (len << TXD_LEN_SHIFT) | flags;
        txd->vlan_tag = 0;
}

int tg3_do_test_dma(struct tg3 *tp, u32 __unused *buf, dma_addr_t buf_dma, int size, int to_device)
{       DBGP("%s\n", __func__);

        struct tg3_internal_buffer_desc test_desc;
        u32 sram_dma_descs;
        int ret;
        unsigned int i;

        sram_dma_descs = NIC_SRAM_DMA_DESC_POOL_BASE;

        tw32(FTQ_RCVBD_COMP_FIFO_ENQDEQ, 0);
        tw32(FTQ_RCVDATA_COMP_FIFO_ENQDEQ, 0);
        tw32(RDMAC_STATUS, 0);
        tw32(WDMAC_STATUS, 0);

        tw32(BUFMGR_MODE, 0);
        tw32(FTQ_RESET, 0);

        test_desc.addr_hi = ((u64) buf_dma) >> 32;
        test_desc.addr_lo = buf_dma & 0xffffffff;
        test_desc.nic_mbuf = 0x00002100;
        test_desc.len = size;

        /*
         * HP ZX1 was seeing test failures for 5701 cards running at 33Mhz
         * the *second* time the tg3 driver was getting loaded after an
         * initial scan.
         *
         * Broadcom tells me:
         *   ...the DMA engine is connected to the GRC block and a DMA
         *   reset may affect the GRC block in some unpredictable way...
         *   The behavior of resets to individual blocks has not been tested.
         *
         * Broadcom noted the GRC reset will also reset all sub-components.
         */
        if (to_device) {
                test_desc.cqid_sqid = (13 << 8) | 2;

                tw32_f(RDMAC_MODE, RDMAC_MODE_ENABLE);
                udelay(40);
        } else {
                test_desc.cqid_sqid = (16 << 8) | 7;

                tw32_f(WDMAC_MODE, WDMAC_MODE_ENABLE);
                udelay(40);
        }
        test_desc.flags = 0x00000005;

        for (i = 0; i < (sizeof(test_desc) / sizeof(u32)); i++) {
                u32 val;

                val = *(((u32 *)&test_desc) + i);
                pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_BASE_ADDR,
                                       sram_dma_descs + (i * sizeof(u32)));
                pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_DATA, val);
        }
        pci_write_config_dword(tp->pdev, TG3PCI_MEM_WIN_BASE_ADDR, 0);

        if (to_device)
                tw32(FTQ_DMA_HIGH_READ_FIFO_ENQDEQ, sram_dma_descs);
        else
                tw32(FTQ_DMA_HIGH_WRITE_FIFO_ENQDEQ, sram_dma_descs);

        ret = -ENODEV;
        for (i = 0; i < 40; i++) {
                u32 val;

                if (to_device)
                        val = tr32(FTQ_RCVBD_COMP_FIFO_ENQDEQ);
                else
                        val = tr32(FTQ_RCVDATA_COMP_FIFO_ENQDEQ);
                if ((val & 0xffff) == sram_dma_descs) {
                        ret = 0;
                        break;
                }

                udelay(100);
        }

        return ret;
}