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linux/drivers/net/sunlance.c
David S. Miller babcda74e9 drivers/net: Kill now superfluous ->last_rx stores. 
The generic packet receive code takes care of setting
netdev->last_rx when necessary, for the sake of the
bonding ARP monitor.

Drivers need not do it any more.

Some cases had to be skipped over because the drivers
were making use of the ->last_rx value themselves.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-03 21:11:17 -08:00

1564 lines
40 KiB
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/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
* lance.c: Linux/Sparc/Lance driver
*
* Written 1995, 1996 by Miguel de Icaza
* Sources:
* The Linux depca driver
* The Linux lance driver.
* The Linux skeleton driver.
* The NetBSD Sparc/Lance driver.
* Theo de Raadt (deraadt@openbsd.org)
* NCR92C990 Lan Controller manual
*
* 1.4:
* Added support to run with a ledma on the Sun4m
*
* 1.5:
* Added multiple card detection.
*
* 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
* (ecd@skynet.be)
*
* 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
* (ecd@skynet.be)
*
* 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
* (davem@caip.rutgers.edu)
*
* 5/29/96: override option 'tpe-link-test?', if it is 'false', as
* this disables auto carrier detection on sun4m. Eddie C. Dost
* (ecd@skynet.be)
*
* 1.7:
* 6/26/96: Bug fix for multiple ledmas, miguel.
*
* 1.8:
* Stole multicast code from depca.c, fixed lance_tx.
*
* 1.9:
* 8/21/96: Fixed the multicast code (Pedro Roque)
*
* 8/28/96: Send fake packet in lance_open() if auto_select is true,
* so we can detect the carrier loss condition in time.
* Eddie C. Dost (ecd@skynet.be)
*
* 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
* MNA trap during chksum_partial_copy(). (ecd@skynet.be)
*
* 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
*
* 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
* This was the sun4c killer. Shit, stupid bug.
* (ecd@skynet.be)
*
* 1.10:
* 1/26/97: Modularize driver. (ecd@skynet.be)
*
* 1.11:
* 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
*
* 1.12:
* 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
* Anton Blanchard (anton@progsoc.uts.edu.au)
* 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
* David S. Miller (davem@redhat.com)
* 2.01:
* 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
*
*/
#undef DEBUG_DRIVER
static char lancestr[] = "LANCE";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <linux/errno.h>
#include <linux/socket.h> /* Used for the temporal inet entries and routing */
#include <linux/route.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <linux/dma-mapping.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/pgtable.h>
#include <asm/byteorder.h> /* Used by the checksum routines */
#include <asm/idprom.h>
#include <asm/prom.h>
#include <asm/auxio.h> /* For tpe-link-test? setting */
#include <asm/irq.h>
#define DRV_NAME "sunlance"
#define DRV_VERSION "2.02"
#define DRV_RELDATE "8/24/03"
#define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
static char version[] =
DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION("Sun Lance ethernet driver");
MODULE_LICENSE("GPL");
/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
#ifndef LANCE_LOG_TX_BUFFERS
#define LANCE_LOG_TX_BUFFERS 4
#define LANCE_LOG_RX_BUFFERS 4
#endif
#define LE_CSR0 0
#define LE_CSR1 1
#define LE_CSR2 2
#define LE_CSR3 3
#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
#define LE_C0_MERR 0x0800 /* ME: Memory error */
#define LE_C0_RINT 0x0400 /* Received interrupt */
#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
#define LE_C0_INTR 0x0080 /* Interrupt or error */
#define LE_C0_INEA 0x0040 /* Interrupt enable */
#define LE_C0_RXON 0x0020 /* Receiver on */
#define LE_C0_TXON 0x0010 /* Transmitter on */
#define LE_C0_TDMD 0x0008 /* Transmitter demand */
#define LE_C0_STOP 0x0004 /* Stop the card */
#define LE_C0_STRT 0x0002 /* Start the card */
#define LE_C0_INIT 0x0001 /* Init the card */
#define LE_C3_BSWP 0x4 /* SWAP */
#define LE_C3_ACON 0x2 /* ALE Control */
#define LE_C3_BCON 0x1 /* Byte control */
/* Receive message descriptor 1 */
#define LE_R1_OWN 0x80 /* Who owns the entry */
#define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
#define LE_R1_FRA 0x20 /* FRA: Frame error */
#define LE_R1_OFL 0x10 /* OFL: Frame overflow */
#define LE_R1_CRC 0x08 /* CRC error */
#define LE_R1_BUF 0x04 /* BUF: Buffer error */
#define LE_R1_SOP 0x02 /* Start of packet */
#define LE_R1_EOP 0x01 /* End of packet */
#define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
#define LE_T1_OWN 0x80 /* Lance owns the packet */
#define LE_T1_ERR 0x40 /* Error summary */
#define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
#define LE_T1_EONE 0x08 /* Error: one retry needed */
#define LE_T1_EDEF 0x04 /* Error: deferred */
#define LE_T1_SOP 0x02 /* Start of packet */
#define LE_T1_EOP 0x01 /* End of packet */
#define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
#define LE_T3_BUF 0x8000 /* Buffer error */
#define LE_T3_UFL 0x4000 /* Error underflow */
#define LE_T3_LCOL 0x1000 /* Error late collision */
#define LE_T3_CLOS 0x0800 /* Error carrier loss */
#define LE_T3_RTY 0x0400 /* Error retry */
#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
#define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
#define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
#define PKT_BUF_SZ 1544
#define RX_BUFF_SIZE PKT_BUF_SZ
#define TX_BUFF_SIZE PKT_BUF_SZ
struct lance_rx_desc {
u16 rmd0; /* low address of packet */
u8 rmd1_bits; /* descriptor bits */
u8 rmd1_hadr; /* high address of packet */
s16 length; /* This length is 2s complement (negative)!
* Buffer length
*/
u16 mblength; /* This is the actual number of bytes received */
};
struct lance_tx_desc {
u16 tmd0; /* low address of packet */
u8 tmd1_bits; /* descriptor bits */
u8 tmd1_hadr; /* high address of packet */
s16 length; /* Length is 2s complement (negative)! */
u16 misc;
};
/* The LANCE initialization block, described in databook. */
/* On the Sparc, this block should be on a DMA region */
struct lance_init_block {
u16 mode; /* Pre-set mode (reg. 15) */
u8 phys_addr[6]; /* Physical ethernet address */
u32 filter[2]; /* Multicast filter. */
/* Receive and transmit ring base, along with extra bits. */
u16 rx_ptr; /* receive descriptor addr */
u16 rx_len; /* receive len and high addr */
u16 tx_ptr; /* transmit descriptor addr */
u16 tx_len; /* transmit len and high addr */
/* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
struct lance_rx_desc brx_ring[RX_RING_SIZE];
struct lance_tx_desc btx_ring[TX_RING_SIZE];
u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
u8 pad[2]; /* align rx_buf for copy_and_sum(). */
u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
};
#define libdesc_offset(rt, elem) \
((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
#define libbuff_offset(rt, elem) \
((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
struct lance_private {
void __iomem *lregs; /* Lance RAP/RDP regs. */
void __iomem *dregs; /* DMA controller regs. */
struct lance_init_block __iomem *init_block_iomem;
struct lance_init_block *init_block_mem;
spinlock_t lock;
int rx_new, tx_new;
int rx_old, tx_old;
struct of_device *ledma; /* If set this points to ledma */
char tpe; /* cable-selection is TPE */
char auto_select; /* cable-selection by carrier */
char burst_sizes; /* ledma SBus burst sizes */
char pio_buffer; /* init block in PIO space? */
unsigned short busmaster_regval;
void (*init_ring)(struct net_device *);
void (*rx)(struct net_device *);
void (*tx)(struct net_device *);
char *name;
dma_addr_t init_block_dvma;
struct net_device *dev; /* Backpointer */
struct of_device *op;
struct of_device *lebuffer;
struct timer_list multicast_timer;
};
#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
lp->tx_old - lp->tx_new-1)
/* Lance registers. */
#define RDP 0x00UL /* register data port */
#define RAP 0x02UL /* register address port */
#define LANCE_REG_SIZE 0x04UL
#define STOP_LANCE(__lp) \
do { void __iomem *__base = (__lp)->lregs; \
sbus_writew(LE_CSR0, __base + RAP); \
sbus_writew(LE_C0_STOP, __base + RDP); \
} while (0)
int sparc_lance_debug = 2;
/* The Lance uses 24 bit addresses */
/* On the Sun4c the DVMA will provide the remaining bytes for us */
/* On the Sun4m we have to instruct the ledma to provide them */
/* Even worse, on scsi/ether SBUS cards, the init block and the
* transmit/receive buffers are addresses as offsets from absolute
* zero on the lebuffer PIO area. -DaveM
*/
#define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
/* Load the CSR registers */
static void load_csrs(struct lance_private *lp)
{
u32 leptr;
if (lp->pio_buffer)
leptr = 0;
else
leptr = LANCE_ADDR(lp->init_block_dvma);
sbus_writew(LE_CSR1, lp->lregs + RAP);
sbus_writew(leptr & 0xffff, lp->lregs + RDP);
sbus_writew(LE_CSR2, lp->lregs + RAP);
sbus_writew(leptr >> 16, lp->lregs + RDP);
sbus_writew(LE_CSR3, lp->lregs + RAP);
sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
/* Point back to csr0 */
sbus_writew(LE_CSR0, lp->lregs + RAP);
}
/* Setup the Lance Rx and Tx rings */
static void lance_init_ring_dvma(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct lance_init_block *ib = lp->init_block_mem;
dma_addr_t aib = lp->init_block_dvma;
__u32 leptr;
int i;
/* Lock out other processes while setting up hardware */
netif_stop_queue(dev);
lp->rx_new = lp->tx_new = 0;
lp->rx_old = lp->tx_old = 0;
/* Copy the ethernet address to the lance init block
* Note that on the sparc you need to swap the ethernet address.
*/
ib->phys_addr [0] = dev->dev_addr [1];
ib->phys_addr [1] = dev->dev_addr [0];
ib->phys_addr [2] = dev->dev_addr [3];
ib->phys_addr [3] = dev->dev_addr [2];
ib->phys_addr [4] = dev->dev_addr [5];
ib->phys_addr [5] = dev->dev_addr [4];
/* Setup the Tx ring entries */
for (i = 0; i <= TX_RING_SIZE; i++) {
leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
ib->btx_ring [i].tmd0 = leptr;
ib->btx_ring [i].tmd1_hadr = leptr >> 16;
ib->btx_ring [i].tmd1_bits = 0;
ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
ib->btx_ring [i].misc = 0;
}
/* Setup the Rx ring entries */
for (i = 0; i < RX_RING_SIZE; i++) {
leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
ib->brx_ring [i].rmd0 = leptr;
ib->brx_ring [i].rmd1_hadr = leptr >> 16;
ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
ib->brx_ring [i].mblength = 0;
}
/* Setup the initialization block */
/* Setup rx descriptor pointer */
leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
ib->rx_ptr = leptr;
/* Setup tx descriptor pointer */
leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
ib->tx_ptr = leptr;
}
static void lance_init_ring_pio(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct lance_init_block __iomem *ib = lp->init_block_iomem;
u32 leptr;
int i;
/* Lock out other processes while setting up hardware */
netif_stop_queue(dev);
lp->rx_new = lp->tx_new = 0;
lp->rx_old = lp->tx_old = 0;
/* Copy the ethernet address to the lance init block
* Note that on the sparc you need to swap the ethernet address.
*/
sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
/* Setup the Tx ring entries */
for (i = 0; i <= TX_RING_SIZE; i++) {
leptr = libbuff_offset(tx_buf, i);
sbus_writew(leptr, &ib->btx_ring [i].tmd0);
sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
/* The ones required by tmd2 */
sbus_writew(0xf000, &ib->btx_ring [i].length);
sbus_writew(0, &ib->btx_ring [i].misc);
}
/* Setup the Rx ring entries */
for (i = 0; i < RX_RING_SIZE; i++) {
leptr = libbuff_offset(rx_buf, i);
sbus_writew(leptr, &ib->brx_ring [i].rmd0);
sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
sbus_writew(-RX_BUFF_SIZE|0xf000,
&ib->brx_ring [i].length);
sbus_writew(0, &ib->brx_ring [i].mblength);
}
/* Setup the initialization block */
/* Setup rx descriptor pointer */
leptr = libdesc_offset(brx_ring, 0);
sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
&ib->rx_len);
sbus_writew(leptr, &ib->rx_ptr);
/* Setup tx descriptor pointer */
leptr = libdesc_offset(btx_ring, 0);
sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
&ib->tx_len);
sbus_writew(leptr, &ib->tx_ptr);
}
static void init_restart_ledma(struct lance_private *lp)
{
u32 csr = sbus_readl(lp->dregs + DMA_CSR);
if (!(csr & DMA_HNDL_ERROR)) {
/* E-Cache draining */
while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
barrier();
}
csr = sbus_readl(lp->dregs + DMA_CSR);
csr &= ~DMA_E_BURSTS;
if (lp->burst_sizes & DMA_BURST32)
csr |= DMA_E_BURST32;
else
csr |= DMA_E_BURST16;
csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
if (lp->tpe)
csr |= DMA_EN_ENETAUI;
else
csr &= ~DMA_EN_ENETAUI;
udelay(20);
sbus_writel(csr, lp->dregs + DMA_CSR);
udelay(200);
}
static int init_restart_lance(struct lance_private *lp)
{
u16 regval = 0;
int i;
if (lp->dregs)
init_restart_ledma(lp);
sbus_writew(LE_CSR0, lp->lregs + RAP);
sbus_writew(LE_C0_INIT, lp->lregs + RDP);
/* Wait for the lance to complete initialization */
for (i = 0; i < 100; i++) {
regval = sbus_readw(lp->lregs + RDP);
if (regval & (LE_C0_ERR | LE_C0_IDON))
break;
barrier();
}
if (i == 100 || (regval & LE_C0_ERR)) {
printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
i, regval);
if (lp->dregs)
printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
return -1;
}
/* Clear IDON by writing a "1", enable interrupts and start lance */
sbus_writew(LE_C0_IDON, lp->lregs + RDP);
sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
if (lp->dregs) {
u32 csr = sbus_readl(lp->dregs + DMA_CSR);
csr |= DMA_INT_ENAB;
sbus_writel(csr, lp->dregs + DMA_CSR);
}
return 0;
}
static void lance_rx_dvma(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct lance_init_block *ib = lp->init_block_mem;
struct lance_rx_desc *rd;
u8 bits;
int len, entry = lp->rx_new;
struct sk_buff *skb;
for (rd = &ib->brx_ring [entry];
!((bits = rd->rmd1_bits) & LE_R1_OWN);
rd = &ib->brx_ring [entry]) {
/* We got an incomplete frame? */
if ((bits & LE_R1_POK) != LE_R1_POK) {
dev->stats.rx_over_errors++;
dev->stats.rx_errors++;
} else if (bits & LE_R1_ERR) {
/* Count only the end frame as a rx error,
* not the beginning
*/
if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
if (bits & LE_R1_EOP) dev->stats.rx_errors++;
} else {
len = (rd->mblength & 0xfff) - 4;
skb = dev_alloc_skb(len + 2);
if (skb == NULL) {
printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
dev->name);
dev->stats.rx_dropped++;
rd->mblength = 0;
rd->rmd1_bits = LE_R1_OWN;
lp->rx_new = RX_NEXT(entry);
return;
}
dev->stats.rx_bytes += len;
skb_reserve(skb, 2); /* 16 byte align */
skb_put(skb, len); /* make room */
skb_copy_to_linear_data(skb,
(unsigned char *)&(ib->rx_buf [entry][0]),
len);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->stats.rx_packets++;
}
/* Return the packet to the pool */
rd->mblength = 0;
rd->rmd1_bits = LE_R1_OWN;
entry = RX_NEXT(entry);
}
lp->rx_new = entry;
}
static void lance_tx_dvma(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct lance_init_block *ib = lp->init_block_mem;
int i, j;
spin_lock(&lp->lock);
j = lp->tx_old;
for (i = j; i != lp->tx_new; i = j) {
struct lance_tx_desc *td = &ib->btx_ring [i];
u8 bits = td->tmd1_bits;
/* If we hit a packet not owned by us, stop */
if (bits & LE_T1_OWN)
break;
if (bits & LE_T1_ERR) {
u16 status = td->misc;
dev->stats.tx_errors++;
if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
if (status & LE_T3_CLOS) {
dev->stats.tx_carrier_errors++;
if (lp->auto_select) {
lp->tpe = 1 - lp->tpe;
printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
dev->name, lp->tpe?"TPE":"AUI");
STOP_LANCE(lp);
lp->init_ring(dev);
load_csrs(lp);
init_restart_lance(lp);
goto out;
}
}
/* Buffer errors and underflows turn off the
* transmitter, restart the adapter.
*/
if (status & (LE_T3_BUF|LE_T3_UFL)) {
dev->stats.tx_fifo_errors++;
printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
dev->name);
STOP_LANCE(lp);
lp->init_ring(dev);
load_csrs(lp);
init_restart_lance(lp);
goto out;
}
} else if ((bits & LE_T1_POK) == LE_T1_POK) {
/*
* So we don't count the packet more than once.
*/
td->tmd1_bits = bits & ~(LE_T1_POK);
/* One collision before packet was sent. */
if (bits & LE_T1_EONE)
dev->stats.collisions++;
/* More than one collision, be optimistic. */
if (bits & LE_T1_EMORE)
dev->stats.collisions += 2;
dev->stats.tx_packets++;
}
j = TX_NEXT(j);
}
lp->tx_old = j;
out:
if (netif_queue_stopped(dev) &&
TX_BUFFS_AVAIL > 0)
netif_wake_queue(dev);
spin_unlock(&lp->lock);
}
static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
{
u16 *p16 = (u16 *) skb->data;
u32 *p32;
u8 *p8;
void __iomem *pbuf = piobuf;
/* We know here that both src and dest are on a 16bit boundary. */
*p16++ = sbus_readw(pbuf);
p32 = (u32 *) p16;
pbuf += 2;
len -= 2;
while (len >= 4) {
*p32++ = sbus_readl(pbuf);
pbuf += 4;
len -= 4;
}
p8 = (u8 *) p32;
if (len >= 2) {
p16 = (u16 *) p32;
*p16++ = sbus_readw(pbuf);
pbuf += 2;
len -= 2;
p8 = (u8 *) p16;
}
if (len >= 1)
*p8 = sbus_readb(pbuf);
}
static void lance_rx_pio(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct lance_init_block __iomem *ib = lp->init_block_iomem;
struct lance_rx_desc __iomem *rd;
unsigned char bits;
int len, entry;
struct sk_buff *skb;
entry = lp->rx_new;
for (rd = &ib->brx_ring [entry];
!((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
rd = &ib->brx_ring [entry]) {
/* We got an incomplete frame? */
if ((bits & LE_R1_POK) != LE_R1_POK) {
dev->stats.rx_over_errors++;
dev->stats.rx_errors++;
} else if (bits & LE_R1_ERR) {
/* Count only the end frame as a rx error,
* not the beginning
*/
if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
if (bits & LE_R1_EOP) dev->stats.rx_errors++;
} else {
len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
skb = dev_alloc_skb(len + 2);
if (skb == NULL) {
printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
dev->name);
dev->stats.rx_dropped++;
sbus_writew(0, &rd->mblength);
sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
lp->rx_new = RX_NEXT(entry);
return;
}
dev->stats.rx_bytes += len;
skb_reserve (skb, 2); /* 16 byte align */
skb_put(skb, len); /* make room */
lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->stats.rx_packets++;
}
/* Return the packet to the pool */
sbus_writew(0, &rd->mblength);
sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
entry = RX_NEXT(entry);
}
lp->rx_new = entry;
}
static void lance_tx_pio(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct lance_init_block __iomem *ib = lp->init_block_iomem;
int i, j;
spin_lock(&lp->lock);
j = lp->tx_old;
for (i = j; i != lp->tx_new; i = j) {
struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
u8 bits = sbus_readb(&td->tmd1_bits);
/* If we hit a packet not owned by us, stop */
if (bits & LE_T1_OWN)
break;
if (bits & LE_T1_ERR) {
u16 status = sbus_readw(&td->misc);
dev->stats.tx_errors++;
if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
if (status & LE_T3_CLOS) {
dev->stats.tx_carrier_errors++;
if (lp->auto_select) {
lp->tpe = 1 - lp->tpe;
printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
dev->name, lp->tpe?"TPE":"AUI");
STOP_LANCE(lp);
lp->init_ring(dev);
load_csrs(lp);
init_restart_lance(lp);
goto out;
}
}
/* Buffer errors and underflows turn off the
* transmitter, restart the adapter.
*/
if (status & (LE_T3_BUF|LE_T3_UFL)) {
dev->stats.tx_fifo_errors++;
printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
dev->name);
STOP_LANCE(lp);
lp->init_ring(dev);
load_csrs(lp);
init_restart_lance(lp);
goto out;
}
} else if ((bits & LE_T1_POK) == LE_T1_POK) {
/*
* So we don't count the packet more than once.
*/
sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
/* One collision before packet was sent. */
if (bits & LE_T1_EONE)
dev->stats.collisions++;
/* More than one collision, be optimistic. */
if (bits & LE_T1_EMORE)
dev->stats.collisions += 2;
dev->stats.tx_packets++;
}
j = TX_NEXT(j);
}
lp->tx_old = j;
if (netif_queue_stopped(dev) &&
TX_BUFFS_AVAIL > 0)
netif_wake_queue(dev);
out:
spin_unlock(&lp->lock);
}
static irqreturn_t lance_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct lance_private *lp = netdev_priv(dev);
int csr0;
sbus_writew(LE_CSR0, lp->lregs + RAP);
csr0 = sbus_readw(lp->lregs + RDP);
/* Acknowledge all the interrupt sources ASAP */
sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
lp->lregs + RDP);
if ((csr0 & LE_C0_ERR) != 0) {
/* Clear the error condition */
sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
LE_C0_CERR | LE_C0_MERR),
lp->lregs + RDP);
}
if (csr0 & LE_C0_RINT)
lp->rx(dev);
if (csr0 & LE_C0_TINT)
lp->tx(dev);
if (csr0 & LE_C0_BABL)
dev->stats.tx_errors++;
if (csr0 & LE_C0_MISS)
dev->stats.rx_errors++;
if (csr0 & LE_C0_MERR) {
if (lp->dregs) {
u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
dev->name, csr0, addr & 0xffffff);
} else {
printk(KERN_ERR "%s: Memory error, status %04x\n",
dev->name, csr0);
}
sbus_writew(LE_C0_STOP, lp->lregs + RDP);
if (lp->dregs) {
u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
dma_csr |= DMA_FIFO_INV;
sbus_writel(dma_csr, lp->dregs + DMA_CSR);
}
lp->init_ring(dev);
load_csrs(lp);
init_restart_lance(lp);
netif_wake_queue(dev);
}
sbus_writew(LE_C0_INEA, lp->lregs + RDP);
return IRQ_HANDLED;
}
/* Build a fake network packet and send it to ourselves. */
static void build_fake_packet(struct lance_private *lp)
{
struct net_device *dev = lp->dev;
int i, entry;
entry = lp->tx_new & TX_RING_MOD_MASK;
if (lp->pio_buffer) {
struct lance_init_block __iomem *ib = lp->init_block_iomem;
u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
sbus_writew(0, &packet[i]);
for (i = 0; i < 6; i++) {
sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
}
sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
sbus_writew(0, &ib->btx_ring[entry].misc);
sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
} else {
struct lance_init_block *ib = lp->init_block_mem;
u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
struct ethhdr *eth = (struct ethhdr *) packet;
memset(packet, 0, ETH_ZLEN);
for (i = 0; i < 6; i++) {
eth->h_dest[i] = dev->dev_addr[i];
eth->h_source[i] = dev->dev_addr[i];
}
ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
ib->btx_ring[entry].misc = 0;
ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
}
lp->tx_new = TX_NEXT(entry);
}
static int lance_open(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
int status = 0;
STOP_LANCE(lp);
if (request_irq(dev->irq, &lance_interrupt, IRQF_SHARED,
lancestr, (void *) dev)) {
printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
return -EAGAIN;
}
/* On the 4m, setup the ledma to provide the upper bits for buffers */
if (lp->dregs) {
u32 regval = lp->init_block_dvma & 0xff000000;
sbus_writel(regval, lp->dregs + DMA_TEST);
}
/* Set mode and clear multicast filter only at device open,
* so that lance_init_ring() called at any error will not
* forget multicast filters.
*
* BTW it is common bug in all lance drivers! --ANK
*/
if (lp->pio_buffer) {
struct lance_init_block __iomem *ib = lp->init_block_iomem;
sbus_writew(0, &ib->mode);
sbus_writel(0, &ib->filter[0]);
sbus_writel(0, &ib->filter[1]);
} else {
struct lance_init_block *ib = lp->init_block_mem;
ib->mode = 0;
ib->filter [0] = 0;
ib->filter [1] = 0;
}
lp->init_ring(dev);
load_csrs(lp);
netif_start_queue(dev);
status = init_restart_lance(lp);
if (!status && lp->auto_select) {
build_fake_packet(lp);
sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
}
return status;
}
static int lance_close(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
netif_stop_queue(dev);
del_timer_sync(&lp->multicast_timer);
STOP_LANCE(lp);
free_irq(dev->irq, (void *) dev);
return 0;
}
static int lance_reset(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
int status;
STOP_LANCE(lp);
/* On the 4m, reset the dma too */
if (lp->dregs) {
u32 csr, addr;
printk(KERN_ERR "resetting ledma\n");
csr = sbus_readl(lp->dregs + DMA_CSR);
sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
udelay(200);
sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
addr = lp->init_block_dvma & 0xff000000;
sbus_writel(addr, lp->dregs + DMA_TEST);
}
lp->init_ring(dev);
load_csrs(lp);
dev->trans_start = jiffies;
status = init_restart_lance(lp);
return status;
}
static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
{
void __iomem *piobuf = dest;
u32 *p32;
u16 *p16;
u8 *p8;
switch ((unsigned long)src & 0x3) {
case 0:
p32 = (u32 *) src;
while (len >= 4) {
sbus_writel(*p32, piobuf);
p32++;
piobuf += 4;
len -= 4;
}
src = (char *) p32;
break;
case 1:
case 3:
p8 = (u8 *) src;
while (len >= 4) {
u32 val;
val = p8[0] << 24;
val |= p8[1] << 16;
val |= p8[2] << 8;
val |= p8[3];
sbus_writel(val, piobuf);
p8 += 4;
piobuf += 4;
len -= 4;
}
src = (char *) p8;
break;
case 2:
p16 = (u16 *) src;
while (len >= 4) {
u32 val = p16[0]<<16 | p16[1];
sbus_writel(val, piobuf);
p16 += 2;
piobuf += 4;
len -= 4;
}
src = (char *) p16;
break;
};
if (len >= 2) {
u16 val = src[0] << 8 | src[1];
sbus_writew(val, piobuf);
src += 2;
piobuf += 2;
len -= 2;
}
if (len >= 1)
sbus_writeb(src[0], piobuf);
}
static void lance_piozero(void __iomem *dest, int len)
{
void __iomem *piobuf = dest;
if ((unsigned long)piobuf & 1) {
sbus_writeb(0, piobuf);
piobuf += 1;
len -= 1;
if (len == 0)
return;
}
if (len == 1) {
sbus_writeb(0, piobuf);
return;
}
if ((unsigned long)piobuf & 2) {
sbus_writew(0, piobuf);
piobuf += 2;
len -= 2;
if (len == 0)
return;
}
while (len >= 4) {
sbus_writel(0, piobuf);
piobuf += 4;
len -= 4;
}
if (len >= 2) {
sbus_writew(0, piobuf);
piobuf += 2;
len -= 2;
}
if (len >= 1)
sbus_writeb(0, piobuf);
}
static void lance_tx_timeout(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
dev->name, sbus_readw(lp->lregs + RDP));
lance_reset(dev);
netif_wake_queue(dev);
}
static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
int entry, skblen, len;
skblen = skb->len;
len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
spin_lock_irq(&lp->lock);
dev->stats.tx_bytes += len;
entry = lp->tx_new & TX_RING_MOD_MASK;
if (lp->pio_buffer) {
struct lance_init_block __iomem *ib = lp->init_block_iomem;
sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
sbus_writew(0, &ib->btx_ring[entry].misc);
lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
if (len != skblen)
lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
} else {
struct lance_init_block *ib = lp->init_block_mem;
ib->btx_ring [entry].length = (-len) | 0xf000;
ib->btx_ring [entry].misc = 0;
skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
if (len != skblen)
memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
}
lp->tx_new = TX_NEXT(entry);
if (TX_BUFFS_AVAIL <= 0)
netif_stop_queue(dev);
/* Kick the lance: transmit now */
sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
/* Read back CSR to invalidate the E-Cache.
* This is needed, because DMA_DSBL_WR_INV is set.
*/
if (lp->dregs)
sbus_readw(lp->lregs + RDP);
spin_unlock_irq(&lp->lock);
dev->trans_start = jiffies;
dev_kfree_skb(skb);
return 0;
}
/* taken from the depca driver */
static void lance_load_multicast(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct dev_mc_list *dmi = dev->mc_list;
char *addrs;
int i;
u32 crc;
u32 val;
/* set all multicast bits */
if (dev->flags & IFF_ALLMULTI)
val = ~0;
else
val = 0;
if (lp->pio_buffer) {
struct lance_init_block __iomem *ib = lp->init_block_iomem;
sbus_writel(val, &ib->filter[0]);
sbus_writel(val, &ib->filter[1]);
} else {
struct lance_init_block *ib = lp->init_block_mem;
ib->filter [0] = val;
ib->filter [1] = val;
}
if (dev->flags & IFF_ALLMULTI)
return;
/* Add addresses */
for (i = 0; i < dev->mc_count; i++) {
addrs = dmi->dmi_addr;
dmi = dmi->next;
/* multicast address? */
if (!(*addrs & 1))
continue;
crc = ether_crc_le(6, addrs);
crc = crc >> 26;
if (lp->pio_buffer) {
struct lance_init_block __iomem *ib = lp->init_block_iomem;
u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
u16 tmp = sbus_readw(&mcast_table[crc>>4]);
tmp |= 1 << (crc & 0xf);
sbus_writew(tmp, &mcast_table[crc>>4]);
} else {
struct lance_init_block *ib = lp->init_block_mem;
u16 *mcast_table = (u16 *) &ib->filter;
mcast_table [crc >> 4] |= 1 << (crc & 0xf);
}
}
}
static void lance_set_multicast(struct net_device *dev)
{
struct lance_private *lp = netdev_priv(dev);
struct lance_init_block *ib_mem = lp->init_block_mem;
struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
u16 mode;
if (!netif_running(dev))
return;
if (lp->tx_old != lp->tx_new) {
mod_timer(&lp->multicast_timer, jiffies + 4);
netif_wake_queue(dev);
return;
}
netif_stop_queue(dev);
STOP_LANCE(lp);
lp->init_ring(dev);
if (lp->pio_buffer)
mode = sbus_readw(&ib_iomem->mode);
else
mode = ib_mem->mode;
if (dev->flags & IFF_PROMISC) {
mode |= LE_MO_PROM;
if (lp->pio_buffer)
sbus_writew(mode, &ib_iomem->mode);
else
ib_mem->mode = mode;
} else {
mode &= ~LE_MO_PROM;
if (lp->pio_buffer)
sbus_writew(mode, &ib_iomem->mode);
else
ib_mem->mode = mode;
lance_load_multicast(dev);
}
load_csrs(lp);
init_restart_lance(lp);
netif_wake_queue(dev);
}
static void lance_set_multicast_retry(unsigned long _opaque)
{
struct net_device *dev = (struct net_device *) _opaque;
lance_set_multicast(dev);
}
static void lance_free_hwresources(struct lance_private *lp)
{
if (lp->lregs)
of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
if (lp->dregs) {
struct of_device *ledma = lp->ledma;
of_iounmap(&ledma->resource[0], lp->dregs,
resource_size(&ledma->resource[0]));
}
if (lp->init_block_iomem) {
of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
sizeof(struct lance_init_block));
} else if (lp->init_block_mem) {
dma_free_coherent(&lp->op->dev,
sizeof(struct lance_init_block),
lp->init_block_mem,
lp->init_block_dvma);
}
}
/* Ethtool support... */
static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
strcpy(info->driver, "sunlance");
strcpy(info->version, "2.02");
}
static u32 sparc_lance_get_link(struct net_device *dev)
{
/* We really do not keep track of this, but this
* is better than not reporting anything at all.
*/
return 1;
}
static const struct ethtool_ops sparc_lance_ethtool_ops = {
.get_drvinfo = sparc_lance_get_drvinfo,
.get_link = sparc_lance_get_link,
};
static int __devinit sparc_lance_probe_one(struct of_device *op,
struct of_device *ledma,
struct of_device *lebuffer)
{
struct device_node *dp = op->node;
static unsigned version_printed;
struct lance_private *lp;
struct net_device *dev;
int i;
dev = alloc_etherdev(sizeof(struct lance_private) + 8);
if (!dev)
return -ENOMEM;
lp = netdev_priv(dev);
if (sparc_lance_debug && version_printed++ == 0)
printk (KERN_INFO "%s", version);
spin_lock_init(&lp->lock);
/* Copy the IDPROM ethernet address to the device structure, later we
* will copy the address in the device structure to the lance
* initialization block.
*/
for (i = 0; i < 6; i++)
dev->dev_addr[i] = idprom->id_ethaddr[i];
/* Get the IO region */
lp->lregs = of_ioremap(&op->resource[0], 0,
LANCE_REG_SIZE, lancestr);
if (!lp->lregs) {
printk(KERN_ERR "SunLance: Cannot map registers.\n");
goto fail;
}
lp->ledma = ledma;
if (lp->ledma) {
lp->dregs = of_ioremap(&ledma->resource[0], 0,
resource_size(&ledma->resource[0]),
"ledma");
if (!lp->dregs) {
printk(KERN_ERR "SunLance: Cannot map "
"ledma registers.\n");
goto fail;
}
}
lp->op = op;
lp->lebuffer = lebuffer;
if (lebuffer) {
/* sanity check */
if (lebuffer->resource[0].start & 7) {
printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
goto fail;
}
lp->init_block_iomem =
of_ioremap(&lebuffer->resource[0], 0,
sizeof(struct lance_init_block), "lebuffer");
if (!lp->init_block_iomem) {
printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
goto fail;
}
lp->init_block_dvma = 0;
lp->pio_buffer = 1;
lp->init_ring = lance_init_ring_pio;
lp->rx = lance_rx_pio;
lp->tx = lance_tx_pio;
} else {
lp->init_block_mem =
dma_alloc_coherent(&op->dev,
sizeof(struct lance_init_block),
&lp->init_block_dvma, GFP_ATOMIC);
if (!lp->init_block_mem) {
printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
goto fail;
}
lp->pio_buffer = 0;
lp->init_ring = lance_init_ring_dvma;
lp->rx = lance_rx_dvma;
lp->tx = lance_tx_dvma;
}
lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
(LE_C3_BSWP |
LE_C3_ACON |
LE_C3_BCON));
lp->name = lancestr;
lp->burst_sizes = 0;
if (lp->ledma) {
struct device_node *ledma_dp = ledma->node;
struct device_node *sbus_dp;
unsigned int sbmask;
const char *prop;
u32 csr;
/* Find burst-size property for ledma */
lp->burst_sizes = of_getintprop_default(ledma_dp,
"burst-sizes", 0);
/* ledma may be capable of fast bursts, but sbus may not. */
sbus_dp = ledma_dp->parent;
sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
DMA_BURSTBITS);
lp->burst_sizes &= sbmask;
/* Get the cable-selection property */
prop = of_get_property(ledma_dp, "cable-selection", NULL);
if (!prop || prop[0] == '\0') {
struct device_node *nd;
printk(KERN_INFO "SunLance: using "
"auto-carrier-detection.\n");
nd = of_find_node_by_path("/options");
if (!nd)
goto no_link_test;
prop = of_get_property(nd, "tpe-link-test?", NULL);
if (!prop)
goto no_link_test;
if (strcmp(prop, "true")) {
printk(KERN_NOTICE "SunLance: warning: overriding option "
"'tpe-link-test?'\n");
printk(KERN_NOTICE "SunLance: warning: mail any problems "
"to ecd@skynet.be\n");
auxio_set_lte(AUXIO_LTE_ON);
}
no_link_test:
lp->auto_select = 1;
lp->tpe = 0;
} else if (!strcmp(prop, "aui")) {
lp->auto_select = 0;
lp->tpe = 0;
} else {
lp->auto_select = 0;
lp->tpe = 1;
}
/* Reset ledma */
csr = sbus_readl(lp->dregs + DMA_CSR);
sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
udelay(200);
sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
} else
lp->dregs = NULL;
lp->dev = dev;
SET_NETDEV_DEV(dev, &op->dev);
dev->open = &lance_open;
dev->stop = &lance_close;
dev->hard_start_xmit = &lance_start_xmit;
dev->tx_timeout = &lance_tx_timeout;
dev->watchdog_timeo = 5*HZ;
dev->set_multicast_list = &lance_set_multicast;
dev->ethtool_ops = &sparc_lance_ethtool_ops;
dev->irq = op->irqs[0];
/* We cannot sleep if the chip is busy during a
* multicast list update event, because such events
* can occur from interrupts (ex. IPv6). So we
* use a timer to try again later when necessary. -DaveM
*/
init_timer(&lp->multicast_timer);
lp->multicast_timer.data = (unsigned long) dev;
lp->multicast_timer.function = &lance_set_multicast_retry;
if (register_netdev(dev)) {
printk(KERN_ERR "SunLance: Cannot register device.\n");
goto fail;
}
dev_set_drvdata(&op->dev, lp);
printk(KERN_INFO "%s: LANCE %pM\n",
dev->name, dev->dev_addr);
return 0;
fail:
lance_free_hwresources(lp);
free_netdev(dev);
return -ENODEV;
}
static int __devinit sunlance_sbus_probe(struct of_device *op, const struct of_device_id *match)
{
struct of_device *parent = to_of_device(op->dev.parent);
struct device_node *parent_dp = parent->node;
int err;
if (!strcmp(parent_dp->name, "ledma")) {
err = sparc_lance_probe_one(op, parent, NULL);
} else if (!strcmp(parent_dp->name, "lebuffer")) {
err = sparc_lance_probe_one(op, NULL, parent);
} else
err = sparc_lance_probe_one(op, NULL, NULL);
return err;
}
static int __devexit sunlance_sbus_remove(struct of_device *op)
{
struct lance_private *lp = dev_get_drvdata(&op->dev);
struct net_device *net_dev = lp->dev;
unregister_netdev(net_dev);
lance_free_hwresources(lp);
free_netdev(net_dev);
dev_set_drvdata(&op->dev, NULL);
return 0;
}
static const struct of_device_id sunlance_sbus_match[] = {
{
.name = "le",
},
{},
};
MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
static struct of_platform_driver sunlance_sbus_driver = {
.name = "sunlance",
.match_table = sunlance_sbus_match,
.probe = sunlance_sbus_probe,
.remove = __devexit_p(sunlance_sbus_remove),
};
/* Find all the lance cards on the system and initialize them */
static int __init sparc_lance_init(void)
{
return of_register_driver(&sunlance_sbus_driver, &of_bus_type);
}
static void __exit sparc_lance_exit(void)
{
of_unregister_driver(&sunlance_sbus_driver);
}
module_init(sparc_lance_init);
module_exit(sparc_lance_exit);
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