static void __b44_set_rx_mode(struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
u32 val;
int i=0;
unsigned char zero[6] = {0,0,0,0,0,0};
val = br32(bp, B44_RXCONFIG);
val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
if (dev->flags & IFF_PROMISC) {
val |= RXCONFIG_PROMISC;
bw32(bp, B44_RXCONFIG, val);
} else {
__b44_set_mac_addr(bp);
if (dev->flags & IFF_ALLMULTI)
val |= RXCONFIG_ALLMULTI;
else
i=__b44_load_mcast(bp, dev);
for(;i<64;i++) {
__b44_cam_write(bp, zero, i);
}
bw32(bp, B44_RXCONFIG, val);
val = br32(bp, B44_CAM_CTRL);
bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
}
}
static void ssb_core_reset(struct b44 *bp)
{
u32 val;
ssb_core_disable(bp);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_RESET | SBTMSLOW_CLOCK | SBTMSLOW_FGC));
br32(bp, B44_SBTMSLOW);
udelay(1);
/* Clear SERR if set, this is a hw bug workaround. */
if (br32(bp, B44_SBTMSHIGH) & SBTMSHIGH_SERR)
bw32(bp, B44_SBTMSHIGH, 0);
val = br32(bp, B44_SBIMSTATE);
if (val & (SBIMSTATE_IBE | SBIMSTATE_TO))
bw32(bp, B44_SBIMSTATE, val & ~(SBIMSTATE_IBE | SBIMSTATE_TO));
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK | SBTMSLOW_FGC));
br32(bp, B44_SBTMSLOW);
udelay(1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK));
br32(bp, B44_SBTMSLOW);
udelay(1);
}
static void ssb_core_reset(struct b44_private *bp)
{
u32 val;
const u32 mask = (SBTMSLOW_CLOCK | SBTMSLOW_FGC | SBTMSLOW_RESET);
ssb_core_disable(bp);
bw32(bp, B44_SBTMSLOW, mask);
bflush(bp, B44_SBTMSLOW, 1);
/* Clear SERR if set, this is a hw bug workaround. */
if (br32(bp, B44_SBTMSHIGH) & SBTMSHIGH_SERR)
bw32(bp, B44_SBTMSHIGH, 0);
val = br32(bp, B44_SBIMSTATE);
if (val & (SBIMSTATE_BAD)) {
bw32(bp, B44_SBIMSTATE, val & ~SBIMSTATE_BAD);
}
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK | SBTMSLOW_FGC));
bflush(bp, B44_SBTMSLOW, 1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK));
bflush(bp, B44_SBTMSLOW, 1);
}
static void b44_set_mac_addr(struct b44_private *bp)
{
u32 val;
bw32(bp, B44_CAM_CTRL, 0);
b44_cam_write(bp, bp->netdev->ll_addr, 0);
val = br32(bp, B44_CAM_CTRL);
bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
}
static int b44_writephy(struct b44 *bp, int reg, u32 val)
{
bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
(MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
(bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
(reg << MDIO_DATA_RA_SHIFT) |
(MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
(val & MDIO_DATA_DATA)));
return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
}
/* bp->lock is held. */
static void __b44_set_mac_addr(struct b44 *bp)
{
bw32(bp, B44_CAM_CTRL, 0);
if (!(bp->dev->flags & IFF_PROMISC)) {
u32 val;
__b44_cam_write(bp, bp->dev->dev_addr, 0);
val = br32(bp, B44_CAM_CTRL);
bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
}
}
static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
dma_addr_t mapping;
u32 len, entry, ctrl;
len = skb->len;
spin_lock_irq(&bp->lock);
/* This is a hard error, log it. */
if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
netif_stop_queue(dev);
spin_unlock_irq(&bp->lock);
printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
dev->name);
return 1;
}
entry = bp->tx_prod;
mapping = pci_map_single(bp->pdev, skb->data, len, PCI_DMA_TODEVICE);
bp->tx_buffers[entry].skb = skb;
pci_unmap_addr_set(&bp->tx_buffers[entry], mapping, mapping);
ctrl = (len & DESC_CTRL_LEN);
ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
if (entry == (B44_TX_RING_SIZE - 1))
ctrl |= DESC_CTRL_EOT;
bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
entry = NEXT_TX(entry);
bp->tx_prod = entry;
wmb();
bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
if (bp->flags & B44_FLAG_BUGGY_TXPTR)
bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
if (bp->flags & B44_FLAG_REORDER_BUG)
br32(bp, B44_DMATX_PTR);
if (TX_BUFFS_AVAIL(bp) < 1)
netif_stop_queue(dev);
spin_unlock_irq(&bp->lock);
dev->trans_start = jiffies;
return 0;
}
static int b44_phy_write(struct b44_private *bp, int reg, u32 val)
{
u32 arg1 = (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT);
u32 arg2 = (bp->phy_addr << MDIO_DATA_PMD_SHIFT);
u32 arg3 = (reg << MDIO_DATA_RA_SHIFT);
u32 arg4 = (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT);
u32 arg5 = (val & MDIO_DATA_DATA);
u32 argv = arg1 | arg2 | arg3 | arg4 | arg5;
bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START | argv));
return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
}
static int b44_readphy(struct b44 *bp, int reg, u32 *val)
{
int err;
bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
(MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
(bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
(reg << MDIO_DATA_RA_SHIFT) |
(MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
*val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
return err;
}
static void ssb_core_disable(struct b44 *bp)
{
if (br32(bp, B44_SBTMSLOW) & SBTMSLOW_RESET)
return;
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_CLOCK));
b44_wait_bit(bp, B44_SBTMSLOW, SBTMSLOW_REJECT, 100000, 0);
b44_wait_bit(bp, B44_SBTMSHIGH, SBTMSHIGH_BUSY, 100000, 1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_FGC | SBTMSLOW_CLOCK |
SBTMSLOW_REJECT | SBTMSLOW_RESET));
br32(bp, B44_SBTMSLOW);
udelay(1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_RESET));
br32(bp, B44_SBTMSLOW);
udelay(1);
}
/** Poll for completed and received packets
*
* @v netdev Network device
*/
static void b44_poll(struct net_device *netdev)
{
struct b44_private *bp = netdev_priv(netdev);
u32 istat;
/* Interrupt status */
istat = br32(bp, B44_ISTAT);
istat &= IMASK_DEF; /* only the events we care about */
if (!istat)
return;
if (istat & ISTAT_TX)
b44_tx_complete(bp);
if (istat & ISTAT_RX)
b44_process_rx_packets(bp);
if (istat & ISTAT_ERRORS) {
DBG("b44 error istat=0x%08x\n", istat);
/* Reset B44 core partially to avoid long waits */
b44_irq(bp->netdev, 0);
b44_halt(bp);
b44_init_tx_ring(bp);
b44_init_rx_ring(bp);
b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
}
/* Acknowledge interrupt */
bw32(bp, B44_ISTAT, 0);
bflush(bp, B44_ISTAT, 1);
}
/** Enable or disable interrupts
*
* @v netdev Network device
* @v enable Interrupts should be enabled
*/
static void b44_irq(struct net_device *netdev, int enable)
{
struct b44_private *bp = netdev_priv(netdev);
/* Interrupt mask specifies which events generate interrupts */
bw32(bp, B44_IMASK, enable ? IMASK_DEF : IMASK_DISABLE);
}
static void ssb_core_disable(struct b44_private *bp)
{
if (br32(bp, B44_SBTMSLOW) & SBTMSLOW_RESET)
return;
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_CLOCK));
b44_wait_bit(bp, B44_SBTMSLOW, SBTMSLOW_REJECT, 100000, 0);
b44_wait_bit(bp, B44_SBTMSHIGH, SBTMSHIGH_BUSY, 100000, 1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_FGC | SBTMSLOW_CLOCK |
SSB_CORE_DOWN));
bflush(bp, B44_SBTMSLOW, 1);
bw32(bp, B44_SBTMSLOW, SSB_CORE_DOWN);
bflush(bp, B44_SBTMSLOW, 1);
}
/** Transmit packet
*
* @v netdev Network device
* @v iobuf I/O buffer
* @ret rc Return status code
*/
static int b44_transmit(struct net_device *netdev, struct io_buffer *iobuf)
{
struct b44_private *bp = netdev_priv(netdev);
u32 cur = bp->tx_cur;
u32 ctrl;
/* Check for TX ring overflow */
if (bp->tx[cur].ctrl) {
DBG("tx overflow\n");
return -ENOBUFS;
}
/* Will call netdev_tx_complete() on the iobuf later */
bp->tx_iobuf[cur] = iobuf;
/* Set up TX descriptor */
ctrl = (iob_len(iobuf) & DESC_CTRL_LEN) |
DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
if (cur == B44_RING_LAST)
ctrl |= DESC_CTRL_EOT;
bp->tx[cur].ctrl = cpu_to_le32(ctrl);
bp->tx[cur].addr = cpu_to_le32(VIRT_TO_B44(iobuf->data));
/* Update next available descriptor index */
cur = ring_next(cur);
bp->tx_cur = cur;
wmb();
/* Tell card that a new TX descriptor is ready */
bw32(bp, B44_DMATX_PTR, cur * sizeof(struct dma_desc));
return 0;
}
static void b44_tx(struct b44 *bp)
{
u32 cur, cons;
cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
cur /= sizeof(struct dma_desc);
/* XXX needs updating when NETIF_F_SG is supported */
for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
struct ring_info *rp = &bp->tx_buffers[cons];
struct sk_buff *skb = rp->skb;
if (unlikely(skb == NULL))
BUG();
pci_unmap_single(bp->pdev,
pci_unmap_addr(rp, mapping),
skb->len,
PCI_DMA_TODEVICE);
rp->skb = NULL;
dev_kfree_skb_irq(skb);
}
bp->tx_cons = cons;
if (netif_queue_stopped(bp->dev) &&
TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
netif_wake_queue(bp->dev);
bw32(bp, B44_GPTIMER, 0);
}
/**
* called by b44_poll in the error path
*/
static void b44_halt(struct b44_private *bp)
{
/* disable ints */
bw32(bp, B44_IMASK, 0);
bflush(bp, B44_IMASK, 1);
DBG("b44: powering down PHY\n");
bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
/*
* Now reset the chip, but without enabling
* the MAC&PHY part of it.
* This has to be done _after_ we shut down the PHY
*/
b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
}
static int b44_phy_read(struct b44_private *bp, int reg, u32 * val)
{
int err;
u32 arg1 = (MDIO_OP_READ << MDIO_DATA_OP_SHIFT);
u32 arg2 = (bp->phy_addr << MDIO_DATA_PMD_SHIFT);
u32 arg3 = (reg << MDIO_DATA_RA_SHIFT);
u32 arg4 = (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT);
u32 argv = arg1 | arg2 | arg3 | arg4;
bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START | argv));
err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
*val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
return err;
}
static void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
{
u32 val;
val = ((u32) data[2]) << 24;
val |= ((u32) data[3]) << 16;
val |= ((u32) data[4]) << 8;
val |= ((u32) data[5]) << 0;
bw32(bp, B44_CAM_DATA_LO, val);
val = (CAM_DATA_HI_VALID |
(((u32) data[0]) << 8) |
(((u32) data[1]) << 0));
bw32(bp, B44_CAM_DATA_HI, val);
bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
(index << CAM_CTRL_INDEX_SHIFT)));
b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
}
/* bp->lock is held. */
static void b44_clear_stats(struct b44 *bp)
{
unsigned long reg;
bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
br32(bp, reg);
for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
br32(bp, reg);
}
static void b44_set_rx_mode(struct net_device *netdev)
{
struct b44_private *bp = netdev_priv(netdev);
unsigned char zero[6] = { 0, 0, 0, 0, 0, 0 };
u32 val;
int i;
val = br32(bp, B44_RXCONFIG);
val &= ~RXCONFIG_PROMISC;
val |= RXCONFIG_ALLMULTI;
b44_set_mac_addr(bp);
for (i = 1; i < 64; i++)
b44_cam_write(bp, zero, i);
bw32(bp, B44_RXCONFIG, val);
val = br32(bp, B44_CAM_CTRL);
bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
}
static u32 ssb_pci_setup(struct b44_private *bp, u32 cores)
{
u32 bar_orig, pci_rev, val;
pci_read_config_dword(bp->pci, SSB_BAR0_WIN, &bar_orig);
pci_write_config_dword(bp->pci, SSB_BAR0_WIN,
BCM4400_PCI_CORE_ADDR);
pci_rev = ssb_get_core_rev(bp);
val = br32(bp, B44_SBINTVEC);
val |= cores;
bw32(bp, B44_SBINTVEC, val);
val = br32(bp, SSB_PCI_TRANS_2);
val |= SSB_PCI_PREF | SSB_PCI_BURST;
bw32(bp, SSB_PCI_TRANS_2, val);
pci_write_config_dword(bp->pci, SSB_BAR0_WIN, bar_orig);
return pci_rev;
}
static u32 ssb_pci_setup(struct b44 *bp, u32 cores)
{
u32 bar_orig, pci_rev, val;
pci_read_config_dword(bp->pdev, SSB_BAR0_WIN, &bar_orig);
pci_write_config_dword(bp->pdev, SSB_BAR0_WIN,
ssb_get_addr(bp, SBID_REG_PCI, 0));
pci_rev = ssb_get_core_rev(bp);
val = br32(bp, B44_SBINTVEC);
val |= cores;
bw32(bp, B44_SBINTVEC, val);
val = br32(bp, SSB_PCI_TRANS_2);
val |= SSB_PCI_PREF | SSB_PCI_BURST;
bw32(bp, SSB_PCI_TRANS_2, val);
pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, bar_orig);
return pci_rev;
}
static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
{
u32 val;
bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
bp->flags |= pause_flags;
val = br32(bp, B44_RXCONFIG);
if (pause_flags & B44_FLAG_RX_PAUSE)
val |= RXCONFIG_FLOW;
else
val &= ~RXCONFIG_FLOW;
bw32(bp, B44_RXCONFIG, val);
val = br32(bp, B44_MAC_FLOW);
if (pause_flags & B44_FLAG_TX_PAUSE)
val |= (MAC_FLOW_PAUSE_ENAB |
(0xc0 & MAC_FLOW_RX_HI_WATER));
else
val &= ~MAC_FLOW_PAUSE_ENAB;
bw32(bp, B44_MAC_FLOW, val);
}
static void b44_check_phy(struct b44 *bp)
{
u32 bmsr, aux;
if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
!b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
(bmsr != 0xffff)) {
if (aux & MII_AUXCTRL_SPEED)
bp->flags |= B44_FLAG_100_BASE_T;
else
bp->flags &= ~B44_FLAG_100_BASE_T;
if (aux & MII_AUXCTRL_DUPLEX)
bp->flags |= B44_FLAG_FULL_DUPLEX;
else
bp->flags &= ~B44_FLAG_FULL_DUPLEX;
if (!netif_carrier_ok(bp->dev) &&
(bmsr & BMSR_LSTATUS)) {
u32 val = br32(bp, B44_TX_CTRL);
u32 local_adv, remote_adv;
if (bp->flags & B44_FLAG_FULL_DUPLEX)
val |= TX_CTRL_DUPLEX;
else
val &= ~TX_CTRL_DUPLEX;
bw32(bp, B44_TX_CTRL, val);
if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
!b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
!b44_readphy(bp, MII_LPA, &remote_adv))
b44_set_flow_ctrl(bp, local_adv, remote_adv);
/* Link now up */
netif_carrier_on(bp->dev);
b44_link_report(bp);
} else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
/* Link now down */
netif_carrier_off(bp->dev);
b44_link_report(bp);
}
if (bmsr & BMSR_RFAULT)
printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
bp->dev->name);
if (bmsr & BMSR_JCD)
printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
bp->dev->name);
}
}
static void b44_populate_rx_descriptor(struct b44_private *bp, u32 idx)
{
struct rx_header *rh;
u32 ctrl, addr;
rh = bp->rx_iobuf[idx]->data;
rh->len = 0;
rh->flags = 0;
ctrl = DESC_CTRL_LEN & (RX_PKT_BUF_SZ - RX_PKT_OFFSET);
if (idx == B44_RING_LAST) {
ctrl |= DESC_CTRL_EOT;
}
addr = VIRT_TO_B44(bp->rx_iobuf[idx]->data);
bp->rx[idx].ctrl = cpu_to_le32(ctrl);
bp->rx[idx].addr = cpu_to_le32(addr);
bw32(bp, B44_DMARX_PTR, idx * sizeof(struct dma_desc));
}
/*
* Chip reset provides power to the b44 MAC & PCI cores, which
* is necessary for MAC register access. We only do a partial
* reset in case of transmit/receive errors (ISTAT_ERRORS) to
* avoid the chip being hung for an unnecessary long time in
* this case.
*
* Called-by: b44_close, b44_halt, b44_inithw(b44_open), b44_probe
*/
static void b44_chip_reset(struct b44_private *bp, int reset_kind)
{
if (ssb_is_core_up(bp)) {
bw32(bp, B44_RCV_LAZY, 0);
bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
bw32(bp, B44_DMATX_CTRL, 0);
bp->tx_dirty = bp->tx_cur = 0;
if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK)
b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
100, 0);
bw32(bp, B44_DMARX_CTRL, 0);
bp->rx_cur = 0;
} else {
ssb_pci_setup(bp, SBINTVEC_ENET0);
}
ssb_core_reset(bp);
/* Don't enable PHY if we are only doing a partial reset. */
if (reset_kind == B44_CHIP_RESET_PARTIAL)
return;
/* Make PHY accessible. */
bw32(bp, B44_MDIO_CTRL,
(MDIO_CTRL_PREAMBLE | (0x0d & MDIO_CTRL_MAXF_MASK)));
bflush(bp, B44_MDIO_CTRL, 1);
/* Enable internal or external PHY */
if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
bflush(bp, B44_ENET_CTRL, 1);
} else {
u32 val = br32(bp, B44_DEVCTRL);
if (val & DEVCTRL_EPR) {
bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
bflush(bp, B44_DEVCTRL, 100);
}
}
}
/* bp->lock is held. */
static void b44_chip_reset(struct b44 *bp)
{
if (ssb_is_core_up(bp)) {
bw32(bp, B44_RCV_LAZY, 0);
bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 100, 1);
bw32(bp, B44_DMATX_CTRL, 0);
bp->tx_prod = bp->tx_cons = 0;
if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
100, 0);
}
bw32(bp, B44_DMARX_CTRL, 0);
bp->rx_prod = bp->rx_cons = 0;
} else {
ssb_pci_setup(bp, (bp->core_unit == 0 ?
SBINTVEC_ENET0 :
SBINTVEC_ENET1));
}
ssb_core_reset(bp);
b44_clear_stats(bp);
/* Make PHY accessible. */
bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
(0x0d & MDIO_CTRL_MAXF_MASK)));
br32(bp, B44_MDIO_CTRL);
if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
br32(bp, B44_ENET_CTRL);
bp->flags &= ~B44_FLAG_INTERNAL_PHY;
} else {
u32 val = br32(bp, B44_DEVCTRL);
if (val & DEVCTRL_EPR) {
bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
br32(bp, B44_DEVCTRL);
udelay(100);
}
bp->flags |= B44_FLAG_INTERNAL_PHY;
}
}
static irqreturn_t b44_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = dev_id;
struct b44 *bp = netdev_priv(dev);
unsigned long flags;
u32 istat, imask;
int handled = 0;
spin_lock_irqsave(&bp->lock, flags);
istat = br32(bp, B44_ISTAT);
imask = br32(bp, B44_IMASK);
/* ??? What the f**k is the purpose of the interrupt mask
* ??? register if we have to mask it out by hand anyways?
*/
istat &= imask;
if (istat) {
handled = 1;
if (netif_rx_schedule_prep(dev)) {
/* NOTE: These writes are posted by the readback of
* the ISTAT register below.
*/
bp->istat = istat;
__b44_disable_ints(bp);
__netif_rx_schedule(dev);
} else {
printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
dev->name);
}
bw32(bp, B44_ISTAT, istat);
br32(bp, B44_ISTAT);
}
spin_unlock_irqrestore(&bp->lock, flags);
return IRQ_RETVAL(handled);
}
static int b44_rx(struct b44 *bp, int budget)
{
int received;
u32 cons, prod;
received = 0;
prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
prod /= sizeof(struct dma_desc);
cons = bp->rx_cons;
while (cons != prod && budget > 0) {
struct ring_info *rp = &bp->rx_buffers[cons];
struct sk_buff *skb = rp->skb;
dma_addr_t map = pci_unmap_addr(rp, mapping);
struct rx_header *rh;
u16 len;
pci_dma_sync_single_for_cpu(bp->pdev, map,
RX_PKT_BUF_SZ,
PCI_DMA_FROMDEVICE);
rh = (struct rx_header *) skb->data;
len = cpu_to_le16(rh->len);
if ((len > (RX_PKT_BUF_SZ - bp->rx_offset)) ||
(rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
drop_it:
b44_recycle_rx(bp, cons, bp->rx_prod);
drop_it_no_recycle:
bp->stats.rx_dropped++;
goto next_pkt;
}
if (len == 0) {
int i = 0;
do {
udelay(2);
barrier();
len = cpu_to_le16(rh->len);
} while (len == 0 && i++ < 5);
if (len == 0)
goto drop_it;
}
/* Omit CRC. */
len -= 4;
if (len > RX_COPY_THRESHOLD) {
int skb_size;
skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
if (skb_size < 0)
goto drop_it;
pci_unmap_single(bp->pdev, map,
skb_size, PCI_DMA_FROMDEVICE);
/* Leave out rx_header */
skb_put(skb, len+bp->rx_offset);
skb_pull(skb,bp->rx_offset);
} else {
struct sk_buff *copy_skb;
b44_recycle_rx(bp, cons, bp->rx_prod);
copy_skb = dev_alloc_skb(len + 2);
if (copy_skb == NULL)
goto drop_it_no_recycle;
copy_skb->dev = bp->dev;
skb_reserve(copy_skb, 2);
skb_put(copy_skb, len);
/* DMA sync done above, copy just the actual packet */
memcpy(copy_skb->data, skb->data+bp->rx_offset, len);
skb = copy_skb;
}
skb->ip_summed = CHECKSUM_NONE;
skb->protocol = eth_type_trans(skb, bp->dev);
netif_receive_skb(skb);
bp->dev->last_rx = jiffies;
received++;
budget--;
next_pkt:
bp->rx_prod = (bp->rx_prod + 1) &
(B44_RX_RING_SIZE - 1);
cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
}
bp->rx_cons = cons;
bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
return received;
}
/*
* Called at device open time to get the chip ready for
* packet processing.
*
* Called-by: b44_open
*/
static void b44_init_hw(struct b44_private *bp, int reset_kind)
{
u32 val;
#define CTRL_MASK (DMARX_CTRL_ENABLE | (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT))
b44_chip_reset(bp, B44_CHIP_RESET_FULL);
if (reset_kind == B44_FULL_RESET) {
b44_phy_reset(bp);
}
/* Enable CRC32, set proper LED modes and power on PHY */
bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
/* This sets the MAC address too. */
b44_set_rx_mode(bp->netdev);
/* MTU + eth header + possible VLAN tag + struct rx_header */
bw32(bp, B44_RXMAXLEN, B44_MAX_MTU + ETH_HLEN + 8 + RX_HEADER_LEN);
bw32(bp, B44_TXMAXLEN, B44_MAX_MTU + ETH_HLEN + 8 + RX_HEADER_LEN);
bw32(bp, B44_TX_HIWMARK, TX_HIWMARK_DEFLT);
if (reset_kind == B44_PARTIAL_RESET) {
bw32(bp, B44_DMARX_CTRL, CTRL_MASK);
} else {
bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
bw32(bp, B44_DMATX_ADDR, VIRT_TO_B44(bp->tx));
bw32(bp, B44_DMARX_CTRL, CTRL_MASK);
bw32(bp, B44_DMARX_ADDR, VIRT_TO_B44(bp->rx));
bw32(bp, B44_DMARX_PTR, B44_RX_RING_LEN_BYTES);
bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
}
val = br32(bp, B44_ENET_CTRL);
bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
#undef CTRL_MASK
}
