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opengnsys_ipxe/src/drivers/net/atl1e.c

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/*
* Copyright(c) 2007 Atheros Corporation. All rights reserved.
*
* Derived from Intel e1000 driver
* Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
*
* Modified for iPXE, October 2009 by Joshua Oreman <oremanj@rwcr.net>.
*
* 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., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include "atl1e.h"
/* User-tweakable parameters: */
#define TX_DESC_COUNT 32 /* TX descriptors, minimum 32 */
#define RX_MEM_SIZE 8192 /* RX area size, minimum 8kb */
#define MAX_FRAME_SIZE 1500 /* Maximum MTU supported, minimum 1500 */
/* Arcane parameters: */
#define PREAMBLE_LEN 7
#define RX_JUMBO_THRESH ((MAX_FRAME_SIZE + ETH_HLEN + \
VLAN_HLEN + ETH_FCS_LEN + 7) >> 3)
#define IMT_VAL 100 /* interrupt moderator timer, us */
#define ICT_VAL 50000 /* interrupt clear timer, us */
#define SMB_TIMER 200000
#define RRD_THRESH 1 /* packets to queue before interrupt */
#define TPD_BURST 5
#define TPD_THRESH (TX_DESC_COUNT / 2)
#define RX_COUNT_DOWN 4
#define TX_COUNT_DOWN (IMT_VAL * 4 / 3)
#define DMAR_DLY_CNT 15
#define DMAW_DLY_CNT 4
#define PCI_DEVICE_ID_ATTANSIC_L1E 0x1026
/*
* atl1e_pci_tbl - PCI Device ID Table
*
* Wildcard entries (PCI_ANY_ID) should come last
* Last entry must be all 0s
*
* { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
* Class, Class Mask, private data (not used) }
*/
static struct pci_device_id atl1e_pci_tbl[] = {
PCI_ROM(0x1969, 0x1026, "atl1e_26", "Attansic L1E 0x1026", 0),
PCI_ROM(0x1969, 0x1066, "atl1e_66", "Attansic L1E 0x1066", 0),
};
static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
static const u16
atl1e_rx_page_vld_regs[AT_PAGE_NUM_PER_QUEUE] =
{
REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD
};
static const u16
atl1e_rx_page_lo_addr_regs[AT_PAGE_NUM_PER_QUEUE] =
{
REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO
};
static const u16
atl1e_rx_page_write_offset_regs[AT_PAGE_NUM_PER_QUEUE] =
{
REG_HOST_RXF0_MB0_LO, REG_HOST_RXF0_MB1_LO
};
static const u16 atl1e_pay_load_size[] = {
128, 256, 512, 1024, 2048, 4096,
};
/*
* atl1e_irq_enable - Enable default interrupt generation settings
* @adapter: board private structure
*/
static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
{
AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
AT_WRITE_FLUSH(&adapter->hw);
}
/*
* atl1e_irq_disable - Mask off interrupt generation on the NIC
* @adapter: board private structure
*/
static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
{
AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
AT_WRITE_FLUSH(&adapter->hw);
}
/*
* atl1e_irq_reset - reset interrupt confiure on the NIC
* @adapter: board private structure
*/
static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
{
AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
AT_WRITE_FLUSH(&adapter->hw);
}
static void atl1e_reset(struct atl1e_adapter *adapter)
{
atl1e_down(adapter);
atl1e_up(adapter);
}
static int atl1e_check_link(struct atl1e_adapter *adapter)
{
struct atl1e_hw *hw = &adapter->hw;
struct net_device *netdev = adapter->netdev;
int err = 0;
u16 speed, duplex, phy_data;
/* MII_BMSR must read twise */
atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
if ((phy_data & BMSR_LSTATUS) == 0) {
/* link down */
if (netdev_link_ok(netdev)) { /* old link state: Up */
u32 value;
/* disable rx */
value = AT_READ_REG(hw, REG_MAC_CTRL);
value &= ~MAC_CTRL_RX_EN;
AT_WRITE_REG(hw, REG_MAC_CTRL, value);
adapter->link_speed = SPEED_0;
DBG("atl1e: %s link is down\n", netdev->name);
netdev_link_down(netdev);
}
} else {
/* Link Up */
err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
if (err)
return err;
/* link result is our setting */
if (adapter->link_speed != speed ||
adapter->link_duplex != duplex) {
adapter->link_speed = speed;
adapter->link_duplex = duplex;
atl1e_setup_mac_ctrl(adapter);
DBG("atl1e: %s link is up, %d Mbps, %s duplex\n",
netdev->name, adapter->link_speed,
adapter->link_duplex == FULL_DUPLEX ?
"full" : "half");
netdev_link_up(netdev);
}
}
return 0;
}
static int atl1e_mdio_read(struct net_device *netdev, int phy_id __unused,
int reg_num)
{
struct atl1e_adapter *adapter = netdev->priv;
u16 result;
atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
return result;
}
static void atl1e_mdio_write(struct net_device *netdev, int phy_id __unused,
int reg_num, int val)
{
struct atl1e_adapter *adapter = netdev->priv;
atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
}
static void atl1e_setup_pcicmd(struct pci_device *pdev)
{
u16 cmd;
pci_read_config_word(pdev, PCI_COMMAND, &cmd);
cmd |= (PCI_COMMAND_MEM | PCI_COMMAND_MASTER);
pci_write_config_word(pdev, PCI_COMMAND, cmd);
/*
* some motherboards BIOS(PXE/EFI) driver may set PME
* while they transfer control to OS (Windows/Linux)
* so we should clear this bit before NIC work normally
*/
pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
mdelay(1);
}
/*
* atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
* @adapter: board private structure to initialize
*
* atl1e_sw_init initializes the Adapter private data structure.
* Fields are initialized based on PCI device information and
* OS network device settings (MTU size).
*/
static int atl1e_sw_init(struct atl1e_adapter *adapter)
{
struct atl1e_hw *hw = &adapter->hw;
struct pci_device *pdev = adapter->pdev;
u32 phy_status_data = 0;
u8 rev_id = 0;
adapter->link_speed = SPEED_0; /* hardware init */
adapter->link_duplex = FULL_DUPLEX;
/* PCI config space info */
pci_read_config_byte(pdev, PCI_REVISION, &rev_id);
phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
/* nic type */
if (rev_id >= 0xF0) {
hw->nic_type = athr_l2e_revB;
} else {
if (phy_status_data & PHY_STATUS_100M)
hw->nic_type = athr_l1e;
else
hw->nic_type = athr_l2e_revA;
}
phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
hw->emi_ca = !!(phy_status_data & PHY_STATUS_EMI_CA);
hw->phy_configured = 0;
/* need confirm */
hw->dmar_block = atl1e_dma_req_1024;
hw->dmaw_block = atl1e_dma_req_1024;
return 0;
}
/*
* atl1e_clean_tx_ring - free all Tx buffers for device close
* @adapter: board private structure
*/
static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
{
struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
&adapter->tx_ring;
struct atl1e_tx_buffer *tx_buffer = NULL;
u16 index, ring_count = tx_ring->count;
if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
return;
for (index = 0; index < ring_count; index++) {
tx_buffer = &tx_ring->tx_buffer[index];
if (tx_buffer->iob) {
netdev_tx_complete(adapter->netdev, tx_buffer->iob);
tx_buffer->dma = 0;
tx_buffer->iob = NULL;
}
}
/* Zero out Tx-buffers */
memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
ring_count);
memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
ring_count);
}
/*
* atl1e_clean_rx_ring - Free rx-reservation iobs
* @adapter: board private structure
*/
static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
{
struct atl1e_rx_ring *rx_ring =
(struct atl1e_rx_ring *)&adapter->rx_ring;
struct atl1e_rx_page_desc *rx_page_desc = &rx_ring->rx_page_desc;
u16 j;
if (adapter->ring_vir_addr == NULL)
return;
/* Zero out the descriptor ring */
for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
if (rx_page_desc->rx_page[j].addr != NULL) {
memset(rx_page_desc->rx_page[j].addr, 0,
rx_ring->real_page_size);
}
}
}
static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
{
*ring_size = ((u32)(adapter->tx_ring.count *
sizeof(struct atl1e_tpd_desc) + 7
/* tx ring, qword align */
+ adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE
+ 31
/* rx ring, 32 bytes align */
+ (1 + AT_PAGE_NUM_PER_QUEUE) *
sizeof(u32) + 3));
/* tx, rx cmd, dword align */
}
static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
{
struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
rx_ring->real_page_size = adapter->rx_ring.page_size
+ MAX_FRAME_SIZE
+ ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
rx_ring->real_page_size = (rx_ring->real_page_size + 31) & ~31;
atl1e_cal_ring_size(adapter, &adapter->ring_size);
adapter->ring_vir_addr = NULL;
adapter->rx_ring.desc = NULL;
return;
}
/*
* Read / Write Ptr Initialize:
*/
static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
{
struct atl1e_tx_ring *tx_ring = NULL;
struct atl1e_rx_ring *rx_ring = NULL;
struct atl1e_rx_page_desc *rx_page_desc = NULL;
int j;
tx_ring = &adapter->tx_ring;
rx_ring = &adapter->rx_ring;
rx_page_desc = &rx_ring->rx_page_desc;
tx_ring->next_to_use = 0;
tx_ring->next_to_clean = 0;
rx_page_desc->rx_using = 0;
rx_page_desc->rx_nxseq = 0;
for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
*rx_page_desc->rx_page[j].write_offset_addr = 0;
rx_page_desc->rx_page[j].read_offset = 0;
}
}
/*
* atl1e_free_ring_resources - Free Tx / RX descriptor Resources
* @adapter: board private structure
*
* Free all transmit software resources
*/
static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
{
atl1e_clean_tx_ring(adapter);
atl1e_clean_rx_ring(adapter);
if (adapter->ring_vir_addr) {
free_phys(adapter->ring_vir_addr, adapter->ring_size);
adapter->ring_vir_addr = NULL;
adapter->ring_dma = 0;
}
if (adapter->tx_ring.tx_buffer) {
free(adapter->tx_ring.tx_buffer);
adapter->tx_ring.tx_buffer = NULL;
}
}
/*
* atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
* @adapter: board private structure
*
* Return 0 on success, negative on failure
*/
static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
{
struct atl1e_tx_ring *tx_ring;
struct atl1e_rx_ring *rx_ring;
struct atl1e_rx_page_desc *rx_page_desc;
int size, j;
u32 offset = 0;
int err = 0;
if (adapter->ring_vir_addr != NULL)
return 0; /* alloced already */
tx_ring = &adapter->tx_ring;
rx_ring = &adapter->rx_ring;
/* real ring DMA buffer */
size = adapter->ring_size;
adapter->ring_vir_addr = malloc_phys(adapter->ring_size, 32);
if (adapter->ring_vir_addr == NULL) {
DBG("atl1e: out of memory allocating %d bytes for %s ring\n",
adapter->ring_size, adapter->netdev->name);
return -ENOMEM;
}
adapter->ring_dma = virt_to_bus(adapter->ring_vir_addr);
memset(adapter->ring_vir_addr, 0, adapter->ring_size);
rx_page_desc = &rx_ring->rx_page_desc;
/* Init TPD Ring */
tx_ring->dma = (adapter->ring_dma + 7) & ~7;
offset = tx_ring->dma - adapter->ring_dma;
tx_ring->desc = (struct atl1e_tpd_desc *)
(adapter->ring_vir_addr + offset);
size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
tx_ring->tx_buffer = zalloc(size);
if (tx_ring->tx_buffer == NULL) {
DBG("atl1e: out of memory allocating %d bytes for %s txbuf\n",
size, adapter->netdev->name);
err = -ENOMEM;
goto failed;
}
/* Init RXF-Pages */
offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
offset = (offset + 31) & ~31;
for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
rx_page_desc->rx_page[j].dma =
adapter->ring_dma + offset;
rx_page_desc->rx_page[j].addr =
adapter->ring_vir_addr + offset;
offset += rx_ring->real_page_size;
}
/* Init CMB dma address */
tx_ring->cmb_dma = adapter->ring_dma + offset;
tx_ring->cmb = (u32 *)(adapter->ring_vir_addr + offset);
offset += sizeof(u32);
for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
rx_page_desc->rx_page[j].write_offset_dma =
adapter->ring_dma + offset;
rx_page_desc->rx_page[j].write_offset_addr =
adapter->ring_vir_addr + offset;
offset += sizeof(u32);
}
if (offset > adapter->ring_size) {
DBG("atl1e: ring miscalculation! need %d > %d bytes\n",
offset, adapter->ring_size);
err = -EINVAL;
goto failed;
}
return 0;
failed:
atl1e_free_ring_resources(adapter);
return err;
}
static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
{
struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
struct atl1e_rx_ring *rx_ring =
(struct atl1e_rx_ring *)&adapter->rx_ring;
struct atl1e_tx_ring *tx_ring =
(struct atl1e_tx_ring *)&adapter->tx_ring;
struct atl1e_rx_page_desc *rx_page_desc = NULL;
int j;
AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI, 0);
AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO, tx_ring->dma);
AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO, tx_ring->cmb_dma);
rx_page_desc = &rx_ring->rx_page_desc;
/* RXF Page Physical address / Page Length */
AT_WRITE_REG(hw, REG_RXF0_BASE_ADDR_HI, 0);
for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
u32 page_phy_addr;
u32 offset_phy_addr;
page_phy_addr = rx_page_desc->rx_page[j].dma;
offset_phy_addr = rx_page_desc->rx_page[j].write_offset_dma;
AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[j], page_phy_addr);
AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[j],
offset_phy_addr);
AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[j], 1);
}
/* Page Length */
AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
/* Load all of base address above */
AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
return;
}
static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
{
struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
u32 dev_ctrl_data = 0;
u32 max_pay_load = 0;
u32 jumbo_thresh = 0;
u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */
/* configure TXQ param */
if (hw->nic_type != athr_l2e_revB) {
extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
jumbo_thresh = MAX_FRAME_SIZE + extra_size;
AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
}
dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
DEVICE_CTRL_MAX_PAYLOAD_MASK;
if (max_pay_load < hw->dmaw_block)
hw->dmaw_block = max_pay_load;
max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
DEVICE_CTRL_MAX_RREQ_SZ_MASK;
if (max_pay_load < hw->dmar_block)
hw->dmar_block = max_pay_load;
if (hw->nic_type != athr_l2e_revB)
AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
atl1e_pay_load_size[hw->dmar_block]);
/* enable TXQ */
AT_WRITE_REGW(hw, REG_TXQ_CTRL,
((TPD_BURST & TXQ_CTRL_NUM_TPD_BURST_MASK)
<< TXQ_CTRL_NUM_TPD_BURST_SHIFT)
| TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
return;
}
static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
{
struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
u32 rxf_len = 0;
u32 rxf_low = 0;
u32 rxf_high = 0;
u32 rxf_thresh_data = 0;
u32 rxq_ctrl_data = 0;
if (hw->nic_type != athr_l2e_revB) {
AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
(u16)((RX_JUMBO_THRESH & RXQ_JMBOSZ_TH_MASK) <<
RXQ_JMBOSZ_TH_SHIFT |
(1 & RXQ_JMBO_LKAH_MASK) <<
RXQ_JMBO_LKAH_SHIFT));
rxf_len = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
rxf_high = rxf_len * 4 / 5;
rxf_low = rxf_len / 5;
rxf_thresh_data = ((rxf_high & RXQ_RXF_PAUSE_TH_HI_MASK)
<< RXQ_RXF_PAUSE_TH_HI_SHIFT) |
((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
<< RXQ_RXF_PAUSE_TH_LO_SHIFT);
AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
}
/* RRS */
AT_WRITE_REG(hw, REG_IDT_TABLE, 0);
AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, 0);
rxq_ctrl_data |= RXQ_CTRL_PBA_ALIGN_32 |
RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
return;
}
static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
{
struct atl1e_hw *hw = &adapter->hw;
u32 dma_ctrl_data = 0;
dma_ctrl_data = DMA_CTRL_RXCMB_EN;
dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
<< DMA_CTRL_DMAR_BURST_LEN_SHIFT;
dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
<< DMA_CTRL_DMAW_BURST_LEN_SHIFT;
dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
dma_ctrl_data |= (DMAR_DLY_CNT & DMA_CTRL_DMAR_DLY_CNT_MASK)
<< DMA_CTRL_DMAR_DLY_CNT_SHIFT;
dma_ctrl_data |= (DMAW_DLY_CNT & DMA_CTRL_DMAW_DLY_CNT_MASK)
<< DMA_CTRL_DMAW_DLY_CNT_SHIFT;
AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
return;
}
static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
{
u32 value;
struct atl1e_hw *hw = &adapter->hw;
/* Config MAC CTRL Register */
value = MAC_CTRL_TX_EN |
MAC_CTRL_RX_EN ;
if (FULL_DUPLEX == adapter->link_duplex)
value |= MAC_CTRL_DUPLX;
value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
MAC_CTRL_SPEED_SHIFT);
value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
value |= ((PREAMBLE_LEN & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
value |= MAC_CTRL_BC_EN;
value |= MAC_CTRL_MC_ALL_EN;
AT_WRITE_REG(hw, REG_MAC_CTRL, value);
}
/*
* atl1e_configure - Configure Transmit&Receive Unit after Reset
* @adapter: board private structure
*
* Configure the Tx /Rx unit of the MAC after a reset.
*/
static int atl1e_configure(struct atl1e_adapter *adapter)
{
struct atl1e_hw *hw = &adapter->hw;
u32 intr_status_data = 0;
/* clear interrupt status */
AT_WRITE_REG(hw, REG_ISR, ~0);
/* 1. set MAC Address */
atl1e_hw_set_mac_addr(hw);
/* 2. Init the Multicast HASH table (clear) */
AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
/* 3. Clear any WOL status */
AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
/* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
* TPD Ring/SMB/RXF0 Page CMBs, they use the same
* High 32bits memory */
atl1e_configure_des_ring(adapter);
/* 5. set Interrupt Moderator Timer */
AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, IMT_VAL);
AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, IMT_VAL);
AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
/* 6. rx/tx threshold to trig interrupt */
AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, RRD_THRESH);
AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, TPD_THRESH);
AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, RX_COUNT_DOWN);
AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, TX_COUNT_DOWN);
/* 7. set Interrupt Clear Timer */
AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, ICT_VAL);
/* 8. set MTU */
AT_WRITE_REG(hw, REG_MTU, MAX_FRAME_SIZE + ETH_HLEN +
VLAN_HLEN + ETH_FCS_LEN);
/* 9. config TXQ early tx threshold */
atl1e_configure_tx(adapter);
/* 10. config RXQ */
atl1e_configure_rx(adapter);
/* 11. config DMA Engine */
atl1e_configure_dma(adapter);
/* 12. smb timer to trig interrupt */
AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, SMB_TIMER);
intr_status_data = AT_READ_REG(hw, REG_ISR);
if ((intr_status_data & ISR_PHY_LINKDOWN) != 0) {
DBG("atl1e: configure failed, PCIE phy link down\n");
return -1;
}
AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
return 0;
}
static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
{
u16 phy_data;
atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
}
static int atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
{
struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
&adapter->tx_ring;
struct atl1e_tx_buffer *tx_buffer = NULL;
u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
u16 next_to_clean = tx_ring->next_to_clean;
while (next_to_clean != hw_next_to_clean) {
tx_buffer = &tx_ring->tx_buffer[next_to_clean];
tx_buffer->dma = 0;
if (tx_buffer->iob) {
netdev_tx_complete(adapter->netdev, tx_buffer->iob);
tx_buffer->iob = NULL;
}
if (++next_to_clean == tx_ring->count)
next_to_clean = 0;
}
tx_ring->next_to_clean = next_to_clean;
return 1;
}
static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter)
{
struct atl1e_rx_page_desc *rx_page_desc =
(struct atl1e_rx_page_desc *) &adapter->rx_ring.rx_page_desc;
u8 rx_using = rx_page_desc->rx_using;
return (struct atl1e_rx_page *)&(rx_page_desc->rx_page[rx_using]);
}
static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
&adapter->rx_ring;
struct atl1e_rx_page_desc *rx_page_desc =
(struct atl1e_rx_page_desc *) &rx_ring->rx_page_desc;
struct io_buffer *iob = NULL;
struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter);
u32 packet_size, write_offset;
struct atl1e_recv_ret_status *prrs;
write_offset = *(rx_page->write_offset_addr);
if (rx_page->read_offset >= write_offset)
return;
do {
/* get new packet's rrs */
prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
rx_page->read_offset);
/* check sequence number */
if (prrs->seq_num != rx_page_desc->rx_nxseq) {
DBG("atl1e %s: RX sequence number error (%d != %d)\n",
netdev->name, prrs->seq_num,
rx_page_desc->rx_nxseq);
rx_page_desc->rx_nxseq++;
goto fatal_err;
}
rx_page_desc->rx_nxseq++;
/* error packet */
if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
if (prrs->err_flag & (RRS_ERR_BAD_CRC |
RRS_ERR_DRIBBLE | RRS_ERR_CODE |
RRS_ERR_TRUNC)) {
/* hardware error, discard this
packet */
netdev_rx_err(netdev, NULL, EIO);
goto skip_pkt;
}
}
packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
RRS_PKT_SIZE_MASK) - ETH_FCS_LEN;
iob = alloc_iob(packet_size + NET_IP_ALIGN);
if (iob == NULL) {
DBG("atl1e %s: dropping packet under memory pressure\n",
netdev->name);
goto skip_pkt;
}
iob_reserve(iob, NET_IP_ALIGN);
memcpy(iob->data, (u8 *)(prrs + 1), packet_size);
iob_put(iob, packet_size);
netdev_rx(netdev, iob);
skip_pkt:
/* skip current packet whether it's ok or not. */
rx_page->read_offset +=
(((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
RRS_PKT_SIZE_MASK) +
sizeof(struct atl1e_recv_ret_status) + 31) &
0xFFFFFFE0);
if (rx_page->read_offset >= rx_ring->page_size) {
/* mark this page clean */
u16 reg_addr;
u8 rx_using;
rx_page->read_offset =
*(rx_page->write_offset_addr) = 0;
rx_using = rx_page_desc->rx_using;
reg_addr =
atl1e_rx_page_vld_regs[rx_using];
AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
rx_page_desc->rx_using ^= 1;
rx_page = atl1e_get_rx_page(adapter);
}
write_offset = *(rx_page->write_offset_addr);
} while (rx_page->read_offset < write_offset);
return;
fatal_err:
if (!netdev_link_ok(adapter->netdev))
atl1e_reset(adapter);
}
/*
* atl1e_poll - poll for completed transmissions and received packets
* @netdev: network device
*/
static void atl1e_poll(struct net_device *netdev)
{
struct atl1e_adapter *adapter = netdev->priv;
struct atl1e_hw *hw = &adapter->hw;
int max_ints = 64;
u32 status;
do {
status = AT_READ_REG(hw, REG_ISR);
if ((status & IMR_NORMAL_MASK) == 0)
break;
/* link event */
if (status & ISR_GPHY)
atl1e_clear_phy_int(adapter);
/* Ack ISR */
AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
/* check if PCIE PHY Link down */
if (status & ISR_PHY_LINKDOWN) {
DBG("atl1e: PCI-E PHY link down: %x\n", status);
if (netdev_link_ok(adapter->netdev)) {
/* reset MAC */
atl1e_irq_reset(adapter);
atl1e_reset(adapter);
break;
}
}
/* check if DMA read/write error */
if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
DBG("atl1e: PCI-E DMA RW error: %x\n", status);
atl1e_irq_reset(adapter);
atl1e_reset(adapter);
break;
}
/* link event */
if (status & (ISR_GPHY | ISR_MANUAL)) {
atl1e_check_link(adapter);
break;
}
/* transmit event */
if (status & ISR_TX_EVENT)
atl1e_clean_tx_irq(adapter);
if (status & ISR_RX_EVENT)
atl1e_clean_rx_irq(adapter);
} while (--max_ints > 0);
/* re-enable Interrupt*/
AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
return;
}
static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
{
struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
u16 next_to_use = 0;
u16 next_to_clean = 0;
next_to_clean = tx_ring->next_to_clean;
next_to_use = tx_ring->next_to_use;
return (u16)(next_to_clean > next_to_use) ?
(next_to_clean - next_to_use - 1) :
(tx_ring->count + next_to_clean - next_to_use - 1);
}
/*
* get next usable tpd
* Note: should call atl1e_tdp_avail to make sure
* there is enough tpd to use
*/
static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
{
struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
u16 next_to_use = 0;
next_to_use = tx_ring->next_to_use;
if (++tx_ring->next_to_use == tx_ring->count)
tx_ring->next_to_use = 0;
memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
}
static struct atl1e_tx_buffer *
atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
{
struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
return &tx_ring->tx_buffer[tpd - tx_ring->desc];
}
static void atl1e_tx_map(struct atl1e_adapter *adapter,
struct io_buffer *iob, struct atl1e_tpd_desc *tpd)
{
struct atl1e_tx_buffer *tx_buffer = NULL;
u16 buf_len = iob_len(iob);
tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
tx_buffer->iob = iob;
tx_buffer->length = buf_len;
tx_buffer->dma = virt_to_bus(iob->data);
tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
tpd->word2 = ((tpd->word2 & ~TPD_BUFLEN_MASK) |
((cpu_to_le32(buf_len) & TPD_BUFLEN_MASK) <<
TPD_BUFLEN_SHIFT));
tpd->word3 |= 1 << TPD_EOP_SHIFT;
}
static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count __unused,
struct atl1e_tpd_desc *tpd __unused)
{
struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
wmb();
AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
}
static int atl1e_xmit_frame(struct net_device *netdev, struct io_buffer *iob)
{
struct atl1e_adapter *adapter = netdev->priv;
u16 tpd_req = 1;
struct atl1e_tpd_desc *tpd;
if (!netdev_link_ok(netdev)) {
return -EINVAL;
}
if (atl1e_tpd_avail(adapter) < tpd_req) {
return -EBUSY;
}
tpd = atl1e_get_tpd(adapter);
atl1e_tx_map(adapter, iob, tpd);
atl1e_tx_queue(adapter, tpd_req, tpd);
return 0;
}
int atl1e_up(struct atl1e_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
int err = 0;
u32 val;
/* hardware has been reset, we need to reload some things */
err = atl1e_init_hw(&adapter->hw);
if (err) {
return -EIO;
}
atl1e_init_ring_ptrs(adapter);
memcpy(adapter->hw.mac_addr, netdev->ll_addr, ETH_ALEN);
if (atl1e_configure(adapter) != 0) {
return -EIO;
}
atl1e_irq_disable(adapter);
val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
val | MASTER_CTRL_MANUAL_INT);
return err;
}
void atl1e_irq(struct net_device *netdev, int enable)
{
struct atl1e_adapter *adapter = netdev->priv;
if (enable)
atl1e_irq_enable(adapter);
else
atl1e_irq_disable(adapter);
}
void atl1e_down(struct atl1e_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
/* reset MAC to disable all RX/TX */
atl1e_reset_hw(&adapter->hw);
mdelay(1);
netdev_link_down(netdev);
adapter->link_speed = SPEED_0;
adapter->link_duplex = -1;
atl1e_clean_tx_ring(adapter);
atl1e_clean_rx_ring(adapter);
}
/*
* atl1e_open - Called when a network interface is made active
* @netdev: network interface device structure
*
* Returns 0 on success, negative value on failure
*
* The open entry point is called when a network interface is made
* active by the system (IFF_UP). At this point all resources needed
* for transmit and receive operations are allocated, the interrupt
* handler is registered with the OS, the watchdog timer is started,
* and the stack is notified that the interface is ready.
*/
static int atl1e_open(struct net_device *netdev)
{
struct atl1e_adapter *adapter = netdev->priv;
int err;
/* allocate rx/tx dma buffer & descriptors */
atl1e_init_ring_resources(adapter);
err = atl1e_setup_ring_resources(adapter);
if (err)
return err;
err = atl1e_up(adapter);
if (err)
goto err_up;
return 0;
err_up:
atl1e_free_ring_resources(adapter);
atl1e_reset_hw(&adapter->hw);
return err;
}
/*
* atl1e_close - Disables a network interface
* @netdev: network interface device structure
*
* Returns 0, this is not allowed to fail
*
* The close entry point is called when an interface is de-activated
* by the OS. The hardware is still under the drivers control, but
* needs to be disabled. A global MAC reset is issued to stop the
* hardware, and all transmit and receive resources are freed.
*/
static void atl1e_close(struct net_device *netdev)
{
struct atl1e_adapter *adapter = netdev->priv;
atl1e_down(adapter);
atl1e_free_ring_resources(adapter);
}
static struct net_device_operations atl1e_netdev_ops = {
.open = atl1e_open,
.close = atl1e_close,
.transmit = atl1e_xmit_frame,
.poll = atl1e_poll,
.irq = atl1e_irq,
};
static void atl1e_init_netdev(struct net_device *netdev, struct pci_device *pdev)
{
netdev_init(netdev, &atl1e_netdev_ops);
netdev->dev = &pdev->dev;
pci_set_drvdata(pdev, netdev);
}
/*
* atl1e_probe - Device Initialization Routine
* @pdev: PCI device information struct
* @ent: entry in atl1e_pci_tbl
*
* Returns 0 on success, negative on failure
*
* atl1e_probe initializes an adapter identified by a pci_device structure.
* The OS initialization, configuring of the adapter private structure,
* and a hardware reset occur.
*/
static int atl1e_probe(struct pci_device *pdev)
{
struct net_device *netdev;
struct atl1e_adapter *adapter = NULL;
static int cards_found;
int err = 0;
adjust_pci_device(pdev);
netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
if (netdev == NULL) {
err = -ENOMEM;
DBG("atl1e: out of memory allocating net_device\n");
goto err;
}
atl1e_init_netdev(netdev, pdev);
adapter = netdev->priv;
adapter->bd_number = cards_found;
adapter->netdev = netdev;
adapter->pdev = pdev;
adapter->hw.adapter = adapter;
if (!pdev->membase) {
err = -EIO;
DBG("atl1e: cannot map device registers\n");
goto err_free_netdev;
}
adapter->hw.hw_addr = bus_to_virt(pdev->membase);
/* init mii data */
adapter->mii.dev = netdev;
adapter->mii.mdio_read = atl1e_mdio_read;
adapter->mii.mdio_write = atl1e_mdio_write;
adapter->mii.phy_id_mask = 0x1f;
adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
/* get user settings */
adapter->tx_ring.count = TX_DESC_COUNT;
adapter->rx_ring.page_size = RX_MEM_SIZE;
atl1e_setup_pcicmd(pdev);
/* setup the private structure */
err = atl1e_sw_init(adapter);
if (err) {
DBG("atl1e: private data init failed\n");
goto err_free_netdev;
}
/* Init GPHY as early as possible due to power saving issue */
atl1e_phy_init(&adapter->hw);
/* reset the controller to
* put the device in a known good starting state */
err = atl1e_reset_hw(&adapter->hw);
if (err) {
err = -EIO;
goto err_free_netdev;
}
/* This may have been run by a zero-wait timer around
now... unclear. */
atl1e_restart_autoneg(&adapter->hw);
if (atl1e_read_mac_addr(&adapter->hw) != 0) {
DBG("atl1e: cannot read MAC address from EEPROM\n");
err = -EIO;
goto err_free_netdev;
}
memcpy(netdev->hw_addr, adapter->hw.perm_mac_addr, ETH_ALEN);
memcpy(netdev->ll_addr, adapter->hw.mac_addr, ETH_ALEN);
DBG("atl1e: Attansic L1E Ethernet controller on %s, "
"%02x:%02x:%02x:%02x:%02x:%02x\n", adapter->netdev->name,
adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
err = register_netdev(netdev);
if (err) {
DBG("atl1e: cannot register network device\n");
goto err_free_netdev;
}
cards_found++;
return 0;
err_free_netdev:
netdev_nullify(netdev);
netdev_put(netdev);
err:
return err;
}
/*
* atl1e_remove - Device Removal Routine
* @pdev: PCI device information struct
*
* atl1e_remove is called by the PCI subsystem to alert the driver
* that it should release a PCI device. The could be caused by a
* Hot-Plug event, or because the driver is going to be removed from
* memory.
*/
static void atl1e_remove(struct pci_device *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct atl1e_adapter *adapter = netdev->priv;
unregister_netdev(netdev);
atl1e_free_ring_resources(adapter);
atl1e_force_ps(&adapter->hw);
netdev_nullify(netdev);
netdev_put(netdev);
}
struct pci_driver atl1e_driver __pci_driver = {
.ids = atl1e_pci_tbl,
.id_count = (sizeof(atl1e_pci_tbl) / sizeof(atl1e_pci_tbl[0])),
.probe = atl1e_probe,
.remove = atl1e_remove,
};
/********** Hardware-level functions: **********/
/*
* check_eeprom_exist
* return 0 if eeprom exist
*/
int atl1e_check_eeprom_exist(struct atl1e_hw *hw)
{
u32 value;
value = AT_READ_REG(hw, REG_SPI_FLASH_CTRL);
if (value & SPI_FLASH_CTRL_EN_VPD) {
value &= ~SPI_FLASH_CTRL_EN_VPD;
AT_WRITE_REG(hw, REG_SPI_FLASH_CTRL, value);
}
value = AT_READ_REGW(hw, REG_PCIE_CAP_LIST);
return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
}
void atl1e_hw_set_mac_addr(struct atl1e_hw *hw)
{
u32 value;
/*
* 00-0B-6A-F6-00-DC
* 0: 6AF600DC 1: 000B
* low dword
*/
value = (((u32)hw->mac_addr[2]) << 24) |
(((u32)hw->mac_addr[3]) << 16) |
(((u32)hw->mac_addr[4]) << 8) |
(((u32)hw->mac_addr[5])) ;
AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 0, value);
/* hight dword */
value = (((u32)hw->mac_addr[0]) << 8) |
(((u32)hw->mac_addr[1])) ;
AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 1, value);
}
/*
* atl1e_get_permanent_address
* return 0 if get valid mac address,
*/
static int atl1e_get_permanent_address(struct atl1e_hw *hw)
{
union {
u32 dword[2];
u8 byte[8];
} hw_addr;
u32 i;
u32 twsi_ctrl_data;
u8 eth_addr[ETH_ALEN];
if (!atl1e_check_eeprom_exist(hw)) {
/* eeprom exist */
twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
twsi_ctrl_data |= TWSI_CTRL_SW_LDSTART;
AT_WRITE_REG(hw, REG_TWSI_CTRL, twsi_ctrl_data);
for (i = 0; i < AT_TWSI_EEPROM_TIMEOUT; i++) {
mdelay(10);
twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
if ((twsi_ctrl_data & TWSI_CTRL_SW_LDSTART) == 0)
break;
}
if (i >= AT_TWSI_EEPROM_TIMEOUT)
return AT_ERR_TIMEOUT;
}
/* maybe MAC-address is from BIOS */
hw_addr.dword[0] = AT_READ_REG(hw, REG_MAC_STA_ADDR);
hw_addr.dword[1] = AT_READ_REG(hw, REG_MAC_STA_ADDR + 4);
for (i = 0; i < ETH_ALEN; i++) {
eth_addr[ETH_ALEN - i - 1] = hw_addr.byte[i];
}
memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
return 0;
}
void atl1e_force_ps(struct atl1e_hw *hw)
{
AT_WRITE_REGW(hw, REG_GPHY_CTRL,
GPHY_CTRL_PW_WOL_DIS | GPHY_CTRL_EXT_RESET);
}
/*
* Reads the adapter's MAC address from the EEPROM
*
* hw - Struct containing variables accessed by shared code
*/
int atl1e_read_mac_addr(struct atl1e_hw *hw)
{
int err = 0;
err = atl1e_get_permanent_address(hw);
if (err)
return AT_ERR_EEPROM;
memcpy(hw->mac_addr, hw->perm_mac_addr, sizeof(hw->perm_mac_addr));
return 0;
}
/*
* Reads the value from a PHY register
* hw - Struct containing variables accessed by shared code
* reg_addr - address of the PHY register to read
*/
int atl1e_read_phy_reg(struct atl1e_hw *hw, u16 reg_addr, u16 *phy_data)
{
u32 val;
int i;
val = ((u32)(reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW |
MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
wmb();
for (i = 0; i < MDIO_WAIT_TIMES; i++) {
udelay(2);
val = AT_READ_REG(hw, REG_MDIO_CTRL);
if (!(val & (MDIO_START | MDIO_BUSY)))
break;
wmb();
}
if (!(val & (MDIO_START | MDIO_BUSY))) {
*phy_data = (u16)val;
return 0;
}
return AT_ERR_PHY;
}
/*
* Writes a value to a PHY register
* hw - Struct containing variables accessed by shared code
* reg_addr - address of the PHY register to write
* data - data to write to the PHY
*/
int atl1e_write_phy_reg(struct atl1e_hw *hw, u32 reg_addr, u16 phy_data)
{
int i;
u32 val;
val = ((u32)(phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
(reg_addr&MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
MDIO_SUP_PREAMBLE |
MDIO_START |
MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
wmb();
for (i = 0; i < MDIO_WAIT_TIMES; i++) {
udelay(2);
val = AT_READ_REG(hw, REG_MDIO_CTRL);
if (!(val & (MDIO_START | MDIO_BUSY)))
break;
wmb();
}
if (!(val & (MDIO_START | MDIO_BUSY)))
return 0;
return AT_ERR_PHY;
}
/*
* atl1e_init_pcie - init PCIE module
*/
static void atl1e_init_pcie(struct atl1e_hw *hw)
{
u32 value;
/* comment 2lines below to save more power when sususpend
value = LTSSM_TEST_MODE_DEF;
AT_WRITE_REG(hw, REG_LTSSM_TEST_MODE, value);
*/
/* pcie flow control mode change */
value = AT_READ_REG(hw, 0x1008);
value |= 0x8000;
AT_WRITE_REG(hw, 0x1008, value);
}
/*
* Configures PHY autoneg and flow control advertisement settings
*
* hw - Struct containing variables accessed by shared code
*/
static int atl1e_phy_setup_autoneg_adv(struct atl1e_hw *hw)
{
s32 ret_val;
u16 mii_autoneg_adv_reg;
u16 mii_1000t_ctrl_reg;
if (0 != hw->mii_autoneg_adv_reg)
return 0;
/* Read the MII Auto-Neg Advertisement Register (Address 4/9). */
mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;
mii_1000t_ctrl_reg = MII_AT001_CR_1000T_DEFAULT_CAP_MASK;
/*
* First we clear all the 10/100 mb speed bits in the Auto-Neg
* Advertisement Register (Address 4) and the 1000 mb speed bits in
* the 1000Base-T control Register (Address 9).
*/
mii_autoneg_adv_reg &= ~MII_AR_SPEED_MASK;
mii_1000t_ctrl_reg &= ~MII_AT001_CR_1000T_SPEED_MASK;
/* Assume auto-detect media type */
mii_autoneg_adv_reg |= (MII_AR_10T_HD_CAPS |
MII_AR_10T_FD_CAPS |
MII_AR_100TX_HD_CAPS |
MII_AR_100TX_FD_CAPS);
if (hw->nic_type == athr_l1e) {
mii_1000t_ctrl_reg |= MII_AT001_CR_1000T_FD_CAPS;
}
/* flow control fixed to enable all */
mii_autoneg_adv_reg |= (MII_AR_ASM_DIR | MII_AR_PAUSE);
hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
hw->mii_1000t_ctrl_reg = mii_1000t_ctrl_reg;
ret_val = atl1e_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
if (ret_val)
return ret_val;
if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
ret_val = atl1e_write_phy_reg(hw, MII_AT001_CR,
mii_1000t_ctrl_reg);
if (ret_val)
return ret_val;
}
return 0;
}
/*
* Resets the PHY and make all config validate
*
* hw - Struct containing variables accessed by shared code
*
* Sets bit 15 and 12 of the MII control regiser (for F001 bug)
*/
int atl1e_phy_commit(struct atl1e_hw *hw)
{
int ret_val;
u16 phy_data;
phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG;
ret_val = atl1e_write_phy_reg(hw, MII_BMCR, phy_data);
if (ret_val) {
u32 val;
int i;
/**************************************
* pcie serdes link may be down !
**************************************/
for (i = 0; i < 25; i++) {
mdelay(1);
val = AT_READ_REG(hw, REG_MDIO_CTRL);
if (!(val & (MDIO_START | MDIO_BUSY)))
break;
}
if (0 != (val & (MDIO_START | MDIO_BUSY))) {
DBG("atl1e: PCI-E link down for at least 25ms\n");
return ret_val;
}
DBG("atl1e: PCI-E link up after %d ms\n", i);
}
return 0;
}
int atl1e_phy_init(struct atl1e_hw *hw)
{
s32 ret_val;
u16 phy_val;
if (hw->phy_configured) {
if (hw->re_autoneg) {
hw->re_autoneg = 0;
return atl1e_restart_autoneg(hw);
}
return 0;
}
/* RESET GPHY Core */
AT_WRITE_REGW(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
mdelay(2);
AT_WRITE_REGW(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
GPHY_CTRL_EXT_RESET);
mdelay(2);
/* patches */
/* p1. eable hibernation mode */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0xB);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0xBC00);
if (ret_val)
return ret_val;
/* p2. set Class A/B for all modes */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0);
if (ret_val)
return ret_val;
phy_val = 0x02ef;
/* remove Class AB */
/* phy_val = hw->emi_ca ? 0x02ef : 0x02df; */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, phy_val);
if (ret_val)
return ret_val;
/* p3. 10B ??? */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x12);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x4C04);
if (ret_val)
return ret_val;
/* p4. 1000T power */
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x4);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x8BBB);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x5);
if (ret_val)
return ret_val;
ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x2C46);
if (ret_val)
return ret_val;
mdelay(1);
/*Enable PHY LinkChange Interrupt */
ret_val = atl1e_write_phy_reg(hw, MII_INT_CTRL, 0xC00);
if (ret_val) {
DBG("atl1e: Error enable PHY linkChange Interrupt\n");
return ret_val;
}
/* setup AutoNeg parameters */
ret_val = atl1e_phy_setup_autoneg_adv(hw);
if (ret_val) {
DBG("atl1e: Error Setting up Auto-Negotiation\n");
return ret_val;
}
/* SW.Reset & En-Auto-Neg to restart Auto-Neg*/
DBG("atl1e: Restarting Auto-Neg");
ret_val = atl1e_phy_commit(hw);
if (ret_val) {
DBG("atl1e: Error Resetting the phy");
return ret_val;
}
hw->phy_configured = 1;
return 0;
}
/*
* Reset the transmit and receive units; mask and clear all interrupts.
* hw - Struct containing variables accessed by shared code
* return : 0 or idle status (if error)
*/
int atl1e_reset_hw(struct atl1e_hw *hw)
{
struct atl1e_adapter *adapter = hw->adapter;
struct pci_device *pdev = adapter->pdev;
int timeout = 0;
u32 idle_status_data = 0;
u16 pci_cfg_cmd_word = 0;
/* Workaround for PCI problem when BIOS sets MMRBC incorrectly. */
pci_read_config_word(pdev, PCI_COMMAND, &pci_cfg_cmd_word);
if ((pci_cfg_cmd_word & (PCI_COMMAND_IO | PCI_COMMAND_MEM |
PCI_COMMAND_MASTER))
!= (PCI_COMMAND_IO | PCI_COMMAND_MEM |
PCI_COMMAND_MASTER)) {
pci_cfg_cmd_word |= (PCI_COMMAND_IO | PCI_COMMAND_MEM |
PCI_COMMAND_MASTER);
pci_write_config_word(pdev, PCI_COMMAND, pci_cfg_cmd_word);
}
/*
* Issue Soft Reset to the MAC. This will reset the chip's
* transmit, receive, DMA. It will not effect
* the current PCI configuration. The global reset bit is self-
* clearing, and should clear within a microsecond.
*/
AT_WRITE_REG(hw, REG_MASTER_CTRL,
MASTER_CTRL_LED_MODE | MASTER_CTRL_SOFT_RST);
wmb();
mdelay(1);
/* Wait at least 10ms for All module to be Idle */
for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
idle_status_data = AT_READ_REG(hw, REG_IDLE_STATUS);
if (idle_status_data == 0)
break;
mdelay(1);
}
if (timeout >= AT_HW_MAX_IDLE_DELAY) {
DBG("atl1e: MAC reset timeout\n");
return AT_ERR_TIMEOUT;
}
return 0;
}
/*
* Performs basic configuration of the adapter.
*
* hw - Struct containing variables accessed by shared code
* Assumes that the controller has previously been reset and is in a
* post-reset uninitialized state. Initializes multicast table,
* and Calls routines to setup link
* Leaves the transmit and receive units disabled and uninitialized.
*/
int atl1e_init_hw(struct atl1e_hw *hw)
{
s32 ret_val = 0;
atl1e_init_pcie(hw);
/* Zero out the Multicast HASH table */
/* clear the old settings from the multicast hash table */
AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
ret_val = atl1e_phy_init(hw);
return ret_val;
}
/*
* Detects the current speed and duplex settings of the hardware.
*
* hw - Struct containing variables accessed by shared code
* speed - Speed of the connection
* duplex - Duplex setting of the connection
*/
int atl1e_get_speed_and_duplex(struct atl1e_hw *hw, u16 *speed, u16 *duplex)
{
int err;
u16 phy_data;
/* Read PHY Specific Status Register (17) */
err = atl1e_read_phy_reg(hw, MII_AT001_PSSR, &phy_data);
if (err)
return err;
if (!(phy_data & MII_AT001_PSSR_SPD_DPLX_RESOLVED))
return AT_ERR_PHY_RES;
switch (phy_data & MII_AT001_PSSR_SPEED) {
case MII_AT001_PSSR_1000MBS:
*speed = SPEED_1000;
break;
case MII_AT001_PSSR_100MBS:
*speed = SPEED_100;
break;
case MII_AT001_PSSR_10MBS:
*speed = SPEED_10;
break;
default:
return AT_ERR_PHY_SPEED;
break;
}
if (phy_data & MII_AT001_PSSR_DPLX)
*duplex = FULL_DUPLEX;
else
*duplex = HALF_DUPLEX;
return 0;
}
int atl1e_restart_autoneg(struct atl1e_hw *hw)
{
int err = 0;
err = atl1e_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
if (err)
return err;
if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
err = atl1e_write_phy_reg(hw, MII_AT001_CR,
hw->mii_1000t_ctrl_reg);
if (err)
return err;
}
err = atl1e_write_phy_reg(hw, MII_BMCR,
MII_CR_RESET | MII_CR_AUTO_NEG_EN |
MII_CR_RESTART_AUTO_NEG);
return err;
}
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