/**************************************************************************
Intel Pro 1000 for ppcboot/das-u-boot
Drivers are port from Intel's Linux driver e1000-4.3.15
and from Etherboot pro 1000 driver by mrakes at vivato dot net
tested on both gig copper and gig fiber boards
***************************************************************************/
/*******************************************************************************
Copyright(c) 1999 - 2002 Intel Corporation. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Contact Information:
Linux NICS <linux.nics@intel.com>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*******************************************************************************/
/*
* Copyright (C) Archway Digital Solutions.
*
* written by Chrsitopher Li <cli at arcyway dot com> or <chrisl at gnuchina dot org>
* 2/9/2002
*
* Copyright (C) Linux Networx.
* Massive upgrade to work with the new intel gigabit NICs.
* <ebiederman at lnxi dot com>
*
* Copyright 2011 Freescale Semiconductor, Inc.
*/
#include "e1000.h"
#define TOUT_LOOP 100000
#define virt_to_bus(devno, v) pci_virt_to_mem(devno, (void *) (v))
#define bus_to_phys(devno, a) pci_mem_to_phys(devno, a)
#define E1000_DEFAULT_PCI_PBA 0x00000030
#define E1000_DEFAULT_PCIE_PBA 0x000a0026
/* NIC specific static variables go here */
static char tx_pool[128 + 16];
static char rx_pool[128 + 16];
static char packet[2096];
static struct e1000_tx_desc *tx_base;
static struct e1000_rx_desc *rx_base;
static int tx_tail;
static int rx_tail, rx_last;
static struct pci_device_id e1000_supported[] = {
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82542},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82544EI_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82544EI_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82544GC_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82544GC_LOM},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82540EM},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82545EM_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82545GM_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82546EB_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82545EM_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82546EB_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82546GB_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82540EM_LOM},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82541ER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82541GI_LF},
/* E1000 PCIe card */
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_FIBER },
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_SERDES },
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_QUAD_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571PT_QUAD_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_QUAD_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_QUAD_COPPER_LOWPROFILE},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_SERDES_DUAL},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82571EB_SERDES_QUAD},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82572EI_COPPER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82572EI_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82572EI_SERDES},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82572EI},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82573E},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82573E_IAMT},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82573L},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82574L},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82546GB_QUAD_COPPER_KSP3},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80003ES2LAN_COPPER_DPT},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80003ES2LAN_SERDES_DPT},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80003ES2LAN_COPPER_SPT},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80003ES2LAN_SERDES_SPT},
{}
};
/* Function forward declarations */
static int e1000_setup_link(struct eth_device *nic);
static int e1000_setup_fiber_link(struct eth_device *nic);
static int e1000_setup_copper_link(struct eth_device *nic);
static int e1000_phy_setup_autoneg(struct e1000_hw *hw);
static void e1000_config_collision_dist(struct e1000_hw *hw);
static int e1000_config_mac_to_phy(struct e1000_hw *hw);
static int e1000_config_fc_after_link_up(struct e1000_hw *hw);
static int e1000_check_for_link(struct eth_device *nic);
static int e1000_wait_autoneg(struct e1000_hw *hw);
static int e1000_get_speed_and_duplex(struct e1000_hw *hw, uint16_t * speed,
uint16_t * duplex);
static int e1000_read_phy_reg(struct e1000_hw *hw, uint32_t reg_addr,
uint16_t * phy_data);
static int e1000_write_phy_reg(struct e1000_hw *hw, uint32_t reg_addr,
uint16_t phy_data);
static int32_t e1000_phy_hw_reset(struct e1000_hw *hw);
static int e1000_phy_reset(struct e1000_hw *hw);
static int e1000_detect_gig_phy(struct e1000_hw *hw);
static void e1000_put_hw_eeprom_semaphore(struct e1000_hw *hw);
static void e1000_set_media_type(struct e1000_hw *hw);
static int32_t e1000_swfw_sync_acquire(struct e1000_hw *hw, uint16_t mask);
static int32_t e1000_check_phy_reset_block(struct e1000_hw *hw);
static int32_t e1000_read_eeprom(struct e1000_hw *hw, uint16_t offset,
uint16_t words,
uint16_t *data);
/******************************************************************************
* Raises the EEPROM's clock input.
*
* hw - Struct containing variables accessed by shared code
* eecd - EECD's current value
*****************************************************************************/
void e1000_raise_ee_clk(struct e1000_hw *hw, uint32_t * eecd)
{
/* Raise the clock input to the EEPROM (by setting the SK bit), and then
* wait 50 microseconds.
*/
*eecd = *eecd | E1000_EECD_SK;
E1000_WRITE_REG(hw, EECD, *eecd);
E1000_WRITE_FLUSH(hw);
udelay(50);
}
/******************************************************************************
* Lowers the EEPROM's clock input.
*
* hw - Struct containing variables accessed by shared code
* eecd - EECD's current value
*****************************************************************************/
void e1000_lower_ee_clk(struct e1000_hw *hw, uint32_t * eecd)
{
/* Lower the clock input to the EEPROM (by clearing the SK bit), and then
* wait 50 microseconds.
*/
*eecd = *eecd & ~E1000_EECD_SK;
E1000_WRITE_REG(hw, EECD, *eecd);
E1000_WRITE_FLUSH(hw);
udelay(50);
}
/******************************************************************************
* Shift data bits out to the EEPROM.
*
* hw - Struct containing variables accessed by shared code
* data - data to send to the EEPROM
* count - number of bits to shift out
*****************************************************************************/
static void
e1000_shift_out_ee_bits(struct e1000_hw *hw, uint16_t data, uint16_t count)
{
uint32_t eecd;
uint32_t mask;
/* We need to shift "count" bits out to the EEPROM. So, value in the
* "data" parameter will be shifted out to the EEPROM one bit at a time.
* In order to do this, "data" must be broken down into bits.
*/
mask = 0x01 << (count - 1);
eecd = E1000_READ_REG(hw, EECD);
eecd &= ~(E1000_EECD_DO | E1000_EECD_DI);
do {
/* A "1" is shifted out to the EEPROM by setting bit "DI" to a "1",
* and then raising and then lowering the clock (the SK bit controls
* the clock input to the EEPROM). A "0" is shifted out to the EEPROM
* by setting "DI" to "0" and then raising and then lowering the clock.
*/
eecd &= ~E1000_EECD_DI;
if (data & mask)
eecd |= E1000_EECD_DI;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(50);
e1000_raise_ee_clk(hw, &eecd);
e1000_lower_ee_clk(hw, &eecd);
mask = mask >> 1;
} while (mask);
/* We leave the "DI" bit set to "0" when we leave this routine. */
eecd &= ~E1000_EECD_DI;
E1000_WRITE_REG(hw, EECD, eecd);
}
/******************************************************************************
* Shift data bits in from the EEPROM
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static uint16_t
e1000_shift_in_ee_bits(struct e1000_hw *hw, uint16_t count)
{
uint32_t eecd;
uint32_t i;
uint16_t data;
/* In order to read a register from the EEPROM, we need to shift 'count'
* bits in from the EEPROM. Bits are "shifted in" by raising the clock
* input to the EEPROM (setting the SK bit), and then reading the
* value of the "DO" bit. During this "shifting in" process the
* "DI" bit should always be clear.
*/
eecd = E1000_READ_REG(hw, EECD);
eecd &= ~(E1000_EECD_DO | E1000_EECD_DI);
data = 0;
for (i = 0; i < count; i++) {
data = data << 1;
e1000_raise_ee_clk(hw, &eecd);
eecd = E1000_READ_REG(hw, EECD);
eecd &= ~(E1000_EECD_DI);
if (eecd & E1000_EECD_DO)
data |= 1;
e1000_lower_ee_clk(hw, &eecd);
}
return data;
}
/******************************************************************************
* Returns EEPROM to a "standby" state
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
void e1000_standby_eeprom(struct e1000_hw *hw)
{
struct e1000_eeprom_info *eeprom = &hw->eeprom;
uint32_t eecd;
eecd = E1000_READ_REG(hw, EECD);
if (eeprom->type == e1000_eeprom_microwire) {
eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(eeprom->delay_usec);
/* Clock high */
eecd |= E1000_EECD_SK;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(eeprom->delay_usec);
/* Select EEPROM */
eecd |= E1000_EECD_CS;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(eeprom->delay_usec);
/* Clock low */
eecd &= ~E1000_EECD_SK;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(eeprom->delay_usec);
} else if (eeprom->type == e1000_eeprom_spi) {
/* Toggle CS to flush commands */
eecd |= E1000_EECD_CS;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(eeprom->delay_usec);
eecd &= ~E1000_EECD_CS;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(eeprom->delay_usec);
}
}
/***************************************************************************
* Description: Determines if the onboard NVM is FLASH or EEPROM.
*
* hw - Struct containing variables accessed by shared code
****************************************************************************/
static boolean_t e1000_is_onboard_nvm_eeprom(struct e1000_hw *hw)
{
uint32_t eecd = 0;
DEBUGFUNC();
if (hw->mac_type == e1000_ich8lan)
return FALSE;
if (hw->mac_type == e1000_82573 || hw->mac_type == e1000_82574) {
eecd = E1000_READ_REG(hw, EECD);
/* Isolate bits 15 & 16 */
eecd = ((eecd >> 15) & 0x03);
/* If both bits are set, device is Flash type */
if (eecd == 0x03)
return FALSE;
}
return TRUE;
}
/******************************************************************************
* Prepares EEPROM for access
*
* hw - Struct containing variables accessed by shared code
*
* Lowers EEPROM clock. Clears input pin. Sets the chip select pin. This
* function should be called before issuing a command to the EEPROM.
*****************************************************************************/
int32_t e1000_acquire_eeprom(struct e1000_hw *hw)
{
struct e1000_eeprom_info *eeprom = &hw->eeprom;
uint32_t eecd, i = 0;
DEBUGFUNC();
if (e1000_swfw_sync_acquire(hw, E1000_SWFW_EEP_SM))
return -E1000_ERR_SWFW_SYNC;
eecd = E1000_READ_REG(hw, EECD);
if (hw->mac_type != e1000_82573 || hw->mac_type != e1000_82574) {
/* Request EEPROM Access */
if (hw->mac_type > e1000_82544) {
eecd |= E1000_EECD_REQ;
E1000_WRITE_REG(hw, EECD, eecd);
eecd = E1000_READ_REG(hw, EECD);
while ((!(eecd & E1000_EECD_GNT)) &&
(i < E1000_EEPROM_GRANT_ATTEMPTS)) {
i++;
udelay(5);
eecd = E1000_READ_REG(hw, EECD);
}
if (!(eecd & E1000_EECD_GNT)) {
eecd &= ~E1000_EECD_REQ;
E1000_WRITE_REG(hw, EECD, eecd);
DEBUGOUT("Could not acquire EEPROM grant\n");
return -E1000_ERR_EEPROM;
}
}
}
/* Setup EEPROM for Read/Write */
if (eeprom->type == e1000_eeprom_microwire) {
/* Clear SK and DI */
eecd &= ~(E1000_EECD_DI | E1000_EECD_SK);
E1000_WRITE_REG(hw, EECD, eecd);
/* Set CS */
eecd |= E1000_EECD_CS;
E1000_WRITE_REG(hw, EECD, eecd);
} else if (eeprom->type == e1000_eeprom_spi) {
/* Clear SK and CS */
eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
E1000_WRITE_REG(hw, EECD, eecd);
udelay(1);
}
return E1000_SUCCESS;
}
/******************************************************************************
* Sets up eeprom variables in the hw struct. Must be called after mac_type
* is configured. Additionally, if this is ICH8, the flash controller GbE
* registers must be mapped, or this will crash.
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static int32_t e1000_init_eeprom_params(struct e1000_hw *hw)
{
struct e1000_eeprom_info *eeprom = &hw->eeprom;
uint32_t eecd = E1000_READ_REG(hw, EECD);
int32_t ret_val = E1000_SUCCESS;
uint16_t eeprom_size;
DEBUGFUNC();
switch (hw->mac_type) {
case e1000_82542_rev2_0:
case e1000_82542_rev2_1:
case e1000_82543:
case e1000_82544:
eeprom->type = e1000_eeprom_microwire;
eeprom->word_size = 64;
eeprom->opcode_bits = 3;
eeprom->address_bits = 6;
eeprom->delay_usec = 50;
eeprom->use_eerd = FALSE;
eeprom->use_eewr = FALSE;
break;
case e1000_82540:
case e1000_82545:
case e1000_82545_rev_3:
case e1000_82546:
case e1000_82546_rev_3:
eeprom->type = e1000_eeprom_microwire;
eeprom->opcode_bits = 3;
eeprom->delay_usec = 50;
if (eecd & E1000_EECD_SIZE) {
eeprom->word_size = 256;
eeprom->address_bits = 8;
} else {
eeprom->word_size = 64;
eeprom->address_bits = 6;
}
eeprom->use_eerd = FALSE;
eeprom->use_eewr = FALSE;
break;
case e1000_82541:
case e1000_82541_rev_2:
case e1000_82547:
case e1000_82547_rev_2:
if (eecd & E1000_EECD_TYPE) {
eeprom->type = e1000_eeprom_spi;
eeprom->opcode_bits = 8;
eeprom->delay_usec = 1;
if (eecd & E1000_EECD_ADDR_BITS) {
eeprom->page_size = 32;
eeprom->address_bits = 16;
} else {
eeprom->page_size = 8;
eeprom->address_bits = 8;
}
} else {
eeprom->type = e1000_eeprom_microwire;
eeprom->opcode_bits = 3;
eeprom->delay_usec = 50;
if (eecd & E1000_EECD_ADDR_BITS) {
eeprom->word_size = 256;
eeprom->address_bits = 8;
} else {
eeprom->word_size = 64;
eeprom->address_bits = 6;
}
}
eeprom->use_eerd = FALSE;
eeprom->use_eewr = FALSE;
break;
case e1000_82571:
case e1000_82572:
eeprom->type = e1000_eeprom_spi;
eeprom->opcode_bits = 8;
eeprom->delay_usec = 1;
if (eecd & E1000_EECD_ADDR_BITS) {
eeprom->page_size = 32;
eeprom->address_bits = 16;
} else {
eeprom->page_size = 8;
eeprom->address_bits = 8;
}
eeprom->use_eerd = FALSE;
eeprom->use_eewr = FALSE;
break;
case e1000_82573:
case e1000_82574:
eeprom->type = e1000_eeprom_spi;
eeprom->opcode_bits = 8;
eeprom->delay_usec = 1;
if (eecd & E1000_EECD_ADDR_BITS) {
eeprom->page_size = 32;
eeprom->address_bits = 16;
} else {
eeprom->page_size = 8;
eeprom->address_bits = 8;
}
eeprom->use_eerd = TRUE;
eeprom->use_eewr = TRUE;
if (e1000_is_onboard_nvm_eeprom(hw) == FALSE) {
eeprom->type = e1000_eeprom_flash;
eeprom->word_size = 2048;
/* Ensure that the Autonomous FLASH update bit is cleared due to
* Flash update issue on parts which use a FLASH for NVM. */
eecd &= ~E1000_EECD_AUPDEN;
E1000_WRITE_REG(hw, EECD, eecd);
}
break;
case e1000_80003es2lan:
eeprom->type = e1000_eeprom_spi;
eeprom->opcode_bits = 8;
eeprom->delay_usec = 1;
if (eecd & E1000_EECD_ADDR_BITS) {
eeprom->page_size = 32;
eeprom->address_bits = 16;
} else {
eeprom->page_size = 8;
eeprom->address_bits = 8;
}
eeprom->use_eerd = TRUE;
eeprom->use_eewr = FALSE;
break;
/* ich8lan does not support currently. if needed, please
* add corresponding code and functions.
*/
#if 0
case e1000_ich8lan:
{
int32_t i = 0;
eeprom->type = e1000_eeprom_ich8;
eeprom->use_eerd = FALSE;
eeprom->use_eewr = FALSE;
eeprom->word_size = E1000_SHADOW_RAM_WORDS;
uint32_t flash_size = E1000_READ_ICH_FLASH_REG(hw,
ICH_FLASH_GFPREG);
/* Zero the shadow RAM structure. But don't load it from NVM
* so as to save time for driver init */
if (hw->eeprom_shadow_ram != NULL) {
for (i = 0; i < E1000_SHADOW_RAM_WORDS; i++) {
hw->eeprom_shadow_ram[i].modified = FALSE;
hw->eeprom_shadow_ram[i].eeprom_word = 0xFFFF;
}
}
hw->flash_base_addr = (flash_size & ICH_GFPREG_BASE_MASK) *
ICH_FLASH_SECTOR_SIZE;
hw->flash_bank_size = ((flash_size >> 16)
& ICH_GFPREG_BASE_MASK) + 1;
hw->flash_bank_size -= (flash_size & ICH_GFPREG_BASE_MASK);
hw->flash_bank_size *= ICH_FLASH_SECTOR_SIZE;
hw->flash_bank_size /= 2 * sizeof(uint16_t);
break;
}
#endif
default:
break;
}
if (eeprom->type == e1000_eeprom_spi) {
/* eeprom_size will be an enum [0..8] that maps
* to eeprom sizes 128B to
* 32KB (incremented by powers of 2).
*/
if (hw->mac_type <= e1000_82547_rev_2) {
/* Set to default value for initial eeprom read. */
eeprom->word_size = 64;
ret_val = e1000_read_eeprom(hw, EEPROM_CFG, 1,
&eeprom_size);
if (ret_val)
return ret_val;
eeprom_size = (eeprom_size & EEPROM_SIZE_MASK)
>> EEPROM_SIZE_SHIFT;
/* 256B eeprom size was not supported in earlier
* hardware, so we bump eeprom_size up one to
* ensure that "1" (which maps to 256B) is never
* the result used in the shifting logic below. */
if (eeprom_size)
eeprom_size++;
} else {
eeprom_size = (uint16_t)((eecd &
E1000_EECD_SIZE_EX_MASK) >>
E1000_EECD_SIZE_EX_SHIFT);
}
eeprom->word_size = 1 << (eeprom_size + EEPROM_WORD_SIZE_SHIFT);
}
return ret_val;
}
/******************************************************************************
* Polls the status bit (bit 1) of the EERD to determine when the read is done.
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static int32_t
e1000_poll_eerd_eewr_done(struct e1000_hw *hw, int eerd)
{
uint32_t attempts = 100000;
uint32_t i, reg = 0;
int32_t done = E1000_ERR_EEPROM;
for (i = 0; i < attempts; i++) {
if (eerd == E1000_EEPROM_POLL_READ)
reg = E1000_READ_REG(hw, EERD);
else
reg = E1000_READ_REG(hw, EEWR);
if (reg & E1000_EEPROM_RW_REG_DONE) {
done = E1000_SUCCESS;
break;
}
udelay(5);
}
return done;
}
/******************************************************************************
* Reads a 16 bit word from the EEPROM using the EERD register.
*
* hw - Struct containing variables accessed by shared code
* offset - offset of word in the EEPROM to read
* data - word read from the EEPROM
* words - number of words to read
*****************************************************************************/
static int32_t
e1000_read_eeprom_eerd(struct e1000_hw *hw,
uint16_t offset,
uint16_t words,
uint16_t *data)
{
uint32_t i, eerd = 0;
int32_t error = 0;
for (i = 0; i < words; i++) {
eerd = ((offset+i) << E1000_EEPROM_RW_ADDR_SHIFT) +
E1000_EEPROM_RW_REG_START;
E1000_WRITE_REG(hw, EERD, eerd);
error = e1000_poll_eerd_eewr_done(hw, E1000_EEPROM_POLL_READ);
if (error)
break;
data[i] = (E1000_READ_REG(hw, EERD) >>
E1000_EEPROM_RW_REG_DATA);
}
return error;
}
void e1000_release_eeprom(struct e1000_hw *hw)
{
uint32_t eecd;
DEBUGFUNC();
eecd = E1000_READ_REG(hw, EECD);
if (hw->eeprom.type == e1000_eeprom_spi) {
eecd |= E1000_EECD_CS; /* Pull CS high */
eecd &= ~E1000_EECD_SK; /* Lower SCK */
E1000_WRITE_REG(hw, EECD, eecd);
udelay(hw->eeprom.delay_usec);
} else if (hw->eeprom.type == e1000_eeprom_microwire) {
/* cleanup eeprom */
/* CS on Microwire is active-high */
eecd &= ~(E1000_EECD_CS | E1000_EECD_DI);
E1000_WRITE_REG(hw, EECD, eecd);
/* Rising edge of clock */
eecd |= E1000_EECD_SK;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(hw->eeprom.delay_usec);
/* Falling edge of clock */
eecd &= ~E1000_EECD_SK;
E1000_WRITE_REG(hw, EECD, eecd);
E1000_WRITE_FLUSH(hw);
udelay(hw->eeprom.delay_usec);
}
/* Stop requesting EEPROM access */
if (hw->mac_type > e1000_82544) {
eecd &= ~E1000_EECD_REQ;
E1000_WRITE_REG(hw, EECD, eecd);
}
}
/******************************************************************************
* Reads a 16 bit word from the EEPROM.
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static int32_t
e1000_spi_eeprom_ready(struct e1000_hw *hw)
{
uint16_t retry_count = 0;
uint8_t spi_stat_reg;
DEBUGFUNC();
/* Read "Status Register" repeatedly until the LSB is cleared. The
* EEPROM will signal that the command has been completed by clearing
* bit 0 of the internal status register. If it's not cleared within
* 5 milliseconds, then error out.
*/
retry_count = 0;
do {
e1000_shift_out_ee_bits(hw, EEPROM_RDSR_OPCODE_SPI,
hw->eeprom.opcode_bits);
spi_stat_reg = (uint8_t)e1000_shift_in_ee_bits(hw, 8);
if (!(spi_stat_reg & EEPROM_STATUS_RDY_SPI))
break;
udelay(5);
retry_count += 5;
e1000_standby_eeprom(hw);
} while (retry_count < EEPROM_MAX_RETRY_SPI);
/* ATMEL SPI write time could vary from 0-20mSec on 3.3V devices (and
* only 0-5mSec on 5V devices)
*/
if (retry_count >= EEPROM_MAX_RETRY_SPI) {
DEBUGOUT("SPI EEPROM Status error\n");
return -E1000_ERR_EEPROM;
}
return E1000_SUCCESS;
}
/******************************************************************************
* Reads a 16 bit word from the EEPROM.
*
* hw - Struct containing variables accessed by shared code
* offset - offset of word in the EEPROM to read
* data - word read from the EEPROM
*****************************************************************************/
static int32_t
e1000_read_eeprom(struct e1000_hw *hw, uint16_t offset,
uint16_t words, uint16_t *data)
{
struct e1000_eeprom_info *eeprom = &hw->eeprom;
uint32_t i = 0;
DEBUGFUNC();
/* If eeprom is not yet detected, do so now */
if (eeprom->word_size == 0)
e1000_init_eeprom_params(hw);
/* A check for invalid values: offset too large, too many words,
* and not enough words.
*/
if ((offset >= eeprom->word_size) ||
(words > eeprom->word_size - offset) ||
(words == 0)) {
DEBUGOUT("\"words\" parameter out of bounds."
"Words = %d, size = %d\n", offset, eeprom->word_size);
return -E1000_ERR_EEPROM;
}
/* EEPROM's that don't use EERD to read require us to bit-bang the SPI
* directly. In this case, we need to acquire the EEPROM so that
* FW or other port software does not interrupt.
*/
if (e1000_is_onboard_nvm_eeprom(hw) == TRUE &&
hw->eeprom.use_eerd == FALSE) {
/* Prepare the EEPROM for bit-bang reading */
if (e1000_acquire_eeprom(hw) != E1000_SUCCESS)
return -E1000_ERR_EEPROM;
}
/* Eerd register EEPROM access requires no eeprom aquire/release */
if (eeprom->use_eerd == TRUE)
return e1000_read_eeprom_eerd(hw, offset, words, data);
/* ich8lan does not support currently. if needed, please
* add corresponding code and functions.
*/
#if 0
/* ICH EEPROM access is done via the ICH flash controller */
if (eeprom->type == e1000_eeprom_ich8)
return e1000_read_eeprom_ich8(hw, offset, words, data);
#endif
/* Set up the SPI or Microwire EEPROM for bit-bang reading. We have
* acquired the EEPROM at this point, so any returns should relase it */
if (eeprom->type == e1000_eeprom_spi) {
uint16_t word_in;
uint8_t read_opcode = EEPROM_READ_OPCODE_SPI;
if (e1000_spi_eeprom_ready(hw)) {
e1000_release_eeprom(hw);
return -E1000_ERR_EEPROM;
}
e1000_standby_eeprom(hw);
/* Some SPI eeproms use the 8th address bit embedded in
* the opcode */
if ((eeprom->address_bits == 8) && (offset >= 128))
read_opcode |= EEPROM_A8_OPCODE_SPI;
/* Send the READ command (opcode + addr) */
e1000_shift_out_ee_bits(hw, read_opcode, eeprom->opcode_bits);
e1000_shift_out_ee_bits(hw, (uint16_t)(offset*2),
eeprom->address_bits);
/* Read the data. The address of the eeprom internally
* increments with each byte (spi) being read, saving on the
* overhead of eeprom setup and tear-down. The address
* counter will roll over if reading beyond the size of
* the eeprom, thus allowing the entire memory to be read
* starting from any offset. */
for (i = 0; i < words; i++) {
word_in = e1000_shift_in_ee_bits(hw, 16);
data[i] = (word_in >> 8) | (word_in << 8);
}
} else if (eeprom->type == e1000_eeprom_microwire) {
for (i = 0; i < words; i++) {
/* Send the READ command (opcode + addr) */
e1000_shift_out_ee_bits(hw,
EEPROM_READ_OPCODE_MICROWIRE,
eeprom->opcode_bits);
e1000_shift_out_ee_bits(hw, (uint16_t)(offset + i),
eeprom->address_bits);
/* Read the data. For microwire, each word requires
* the overhead of eeprom setup and tear-down. */
data[i] = e1000_shift_in_ee_bits(hw, 16);
e1000_standby_eeprom(hw);
}
}
/* End this read operation */
e1000_release_eeprom(hw);
return E1000_SUCCESS;
}
/******************************************************************************
* Verifies that the EEPROM has a valid checksum
*
* hw - Struct containing variables accessed by shared code
*
* Reads the first 64 16 bit words of the EEPROM and sums the values read.
* If the the sum of the 64 16 bit words is 0xBABA, the EEPROM's checksum is
* valid.
*****************************************************************************/
static int e1000_validate_eeprom_checksum(struct e1000_hw *hw)
{
uint16_t i, checksum, checksum_reg, *buf;
DEBUGFUNC();
/* Allocate a temporary buffer */
buf = malloc(sizeof(buf[0]) * (EEPROM_CHECKSUM_REG + 1));
if (!buf) {
E1000_ERR(hw->nic, "Unable to allocate EEPROM buffer!\n");
return -E1000_ERR_EEPROM;
}
/* Read the EEPROM */
if (e1000_read_eeprom(hw, 0, EEPROM_CHECKSUM_REG + 1, buf) < 0) {
E1000_ERR(hw->nic, "Unable to read EEPROM!\n");
return -E1000_ERR_EEPROM;
}
/* Compute the checksum */
checksum = 0;
for (i = 0; i < EEPROM_CHECKSUM_REG; i++)
checksum += buf[i];
checksum = ((uint16_t)EEPROM_SUM) - checksum;
checksum_reg = buf[i];
/* Verify it! */
if (checksum == checksum_reg)
return 0;
/* Hrm, verification failed, print an error */
E1000_ERR(hw->nic, "EEPROM checksum is incorrect!\n");
E1000_ERR(hw->nic, " ...register was 0x%04hx, calculated 0x%04hx\n",
checksum_reg, checksum);
return -E1000_ERR_EEPROM;
}
/*****************************************************************************
* Set PHY to class A mode
* Assumes the following operations will follow to enable the new class mode.
* 1. Do a PHY soft reset
* 2. Restart auto-negotiation or force link.
*
* hw - Struct containing variables accessed by shared code
****************************************************************************/
static int32_t
e1000_set_phy_mode(struct e1000_hw *hw)
{
int32_t ret_val;
uint16_t eeprom_data;
DEBUGFUNC();
if ((hw->mac_type == e1000_82545_rev_3) &&
(hw->media_type == e1000_media_type_copper)) {
ret_val = e1000_read_eeprom(hw, EEPROM_PHY_CLASS_WORD,
1, &eeprom_data);
if (ret_val)
return ret_val;
if ((eeprom_data != EEPROM_RESERVED_WORD) &&
(eeprom_data & EEPROM_PHY_CLASS_A)) {
ret_val = e1000_write_phy_reg(hw,
M88E1000_PHY_PAGE_SELECT, 0x000B);
if (ret_val)
return ret_val;
ret_val = e1000_write_phy_reg(hw,
M88E1000_PHY_GEN_CONTROL, 0x8104);
if (ret_val)
return ret_val;
hw->phy_reset_disable = FALSE;
}
}
return E1000_SUCCESS;
}
/***************************************************************************
*
* Obtaining software semaphore bit (SMBI) before resetting PHY.
*
* hw: Struct containing variables accessed by shared code
*
* returns: - E1000_ERR_RESET if fail to obtain semaphore.
* E1000_SUCCESS at any other case.
*
***************************************************************************/
static int32_t
e1000_get_software_semaphore(struct e1000_hw *hw)
{
int32_t timeout = hw->eeprom.word_size + 1;
uint32_t swsm;
DEBUGFUNC();
if (hw->mac_type != e1000_80003es2lan)
return E1000_SUCCESS;
while (timeout) {
swsm = E1000_READ_REG(hw, SWSM);
/* If SMBI bit cleared, it is now set and we hold
* the semaphore */
if (!(swsm & E1000_SWSM_SMBI))
break;
mdelay(1);
timeout--;
}
if (!timeout) {
DEBUGOUT("Driver can't access device - SMBI bit is set.\n");
return -E1000_ERR_RESET;
}
return E1000_SUCCESS;
}
/***************************************************************************
* This function clears HW semaphore bits.
*
* hw: Struct containing variables accessed by shared code
*
* returns: - None.
*
***************************************************************************/
static void
e1000_put_hw_eeprom_semaphore(struct e1000_hw *hw)
{
uint32_t swsm;
DEBUGFUNC();
if (!hw->eeprom_semaphore_present)
return;
swsm = E1000_READ_REG(hw, SWSM);
if (hw->mac_type == e1000_80003es2lan) {
/* Release both semaphores. */
swsm &= ~(E1000_SWSM_SMBI | E1000_SWSM_SWESMBI);
} else
swsm &= ~(E1000_SWSM_SWESMBI);
E1000_WRITE_REG(hw, SWSM, swsm);
}
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