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/*
* Lance ethernet driver for the MIPS processor based
* DECstation family
*
*
* adopted from sunlance.c by Richard van den Berg
*
* additional sources:
* - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
* Revision 1.2
*
* History:
*
* v0.001: The kernel accepts the code and it shows the hardware address.
*
* v0.002: Removed most sparc stuff, left only some module and dma stuff.
*
* v0.003: Enhanced base address calculation from proposals by
* Harald Koerfgen and Thomas Riemer.
*
* v0.004: lance-regs is pointing at the right addresses, added prom
* check. First start of address mapping and DMA.
*
* v0.005: started to play around with LANCE-DMA. This driver will not work
* for non IOASIC lances. HK
*
* v0.006: added pointer arrays to lance_private and setup routine for them
* in dec_lance_init. HK
*
* v0.007: Big shit. The LANCE seems to use a different DMA mechanism to access
* the init block. This looks like one (short) word at a time, but the smallest
* amount the IOASIC can transfer is a (long) word. So we have a 2-2 padding here.
* Changed lance_init_block accordingly. The 16-16 padding for the buffers
* seems to be correct. HK
*
* v0.008 - mods to make PMAX_LANCE work. 01/09/1999 triemer
*/
#undef DEBUG_DRIVER
static char *version =
"declance.c: v0.008 by Linux Mips DECstation task force\n";
static char *lancestr = "LANCE";
/*
* card types
*/
#define ASIC_LANCE 1
#define PMAD_LANCE 2
#define PMAX_LANCE 3
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <asm/dec/interrupts.h>
#include <asm/dec/ioasic_ints.h>
#include <asm/dec/ioasic_addrs.h>
#include <asm/dec/machtype.h>
#include <asm/dec/tc.h>
#include <asm/dec/kn01.h>
#include <asm/wbflush.h>
#include <asm/addrspace.h>
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/hdreg.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/utsname.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <linux/etherdevice.h>
#ifndef CONFIG_TC
unsigned long system_base;
unsigned long dmaptr;
#endif
static int type;
#define CRC_POLYNOMIAL_BE 0x04c11db7UL /* Ethernet CRC, big endian */
#define CRC_POLYNOMIAL_LE 0xedb88320UL /* Ethernet CRC, little endian */
#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: 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 TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
#define PKT_BUF_SZ 1536
#define RX_BUFF_SIZE PKT_BUF_SZ
#define TX_BUFF_SIZE PKT_BUF_SZ
#undef TEST_HITS
#define DEBUG_DRIVER 1
#define ZERO 0
/* The DS2000/3000 have a linear 64 KB buffer.
* The PMAD-AA has 128 kb buffer on-board.
*
* The IOASIC LANCE devices use a shared memory region. This region as seen
* from the CPU is (max) 128 KB long and has to be on an 128 KB boundary.
* The LANCE sees this as a 64 KB long continuous memory region.
*
* The LANCE's DMA address is used as an index in this buffer and DMA takes
* place in bursts of eight 16-Bit words which are packed into four 32-Bit words
* by the IOASIC. This leads to a strange padding: 16 bytes of valid data followed
* by a 16 byte gap :-(.
*/
struct lance_rx_desc {
unsigned short rmd0; /* low address of packet */
short gap0;
unsigned char rmd1_hadr; /* high address of packet */
unsigned char rmd1_bits; /* descriptor bits */
short gap1;
short length; /* This length is 2s complement (negative)!
* Buffer length
*/
short gap2;
unsigned short mblength; /* This is the actual number of bytes received */
short gap3;
};
struct lance_tx_desc {
unsigned short tmd0; /* low address of packet */
short gap0;
unsigned char tmd1_hadr; /* high address of packet */
unsigned char tmd1_bits; /* descriptor bits */
short gap1;
short length; /* Length is 2s complement (negative)! */
short gap2;
unsigned short misc;
short gap3;
};
/* First part of the LANCE initialization block, described in databook. */
struct lance_init_block {
unsigned short mode; /* Pre-set mode (reg. 15) */
short gap0;
unsigned char phys_addr[12]; /* Physical ethernet address
* only 0, 1, 4, 5, 8, 9 are valid
* 2, 3, 6, 7, 10, 11 are gaps
*/
unsigned short filter[8]; /* Multicast filter.
* only 0, 2, 4, 6 are valid
* 1, 3, 5, 7 are gaps
*/
/* Receive and transmit ring base, along with extra bits. */
unsigned short rx_ptr; /* receive descriptor addr */
short gap1;
unsigned short rx_len; /* receive len and high addr */
short gap2;
unsigned short tx_ptr; /* transmit descriptor addr */
short gap3;
unsigned short tx_len; /* transmit len and high addr */
short gap4;
char gap5[16];
/* The buffer descriptors */
struct lance_rx_desc brx_ring[RX_RING_SIZE];
struct lance_tx_desc btx_ring[TX_RING_SIZE];
};
#define BUF_OFFSET_CPU sizeof(struct lance_init_block)
#define BUF_OFFSET_LNC (sizeof(struct lance_init_block)>>1)
#define libdesc_offset(rt, elem) \
((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
/*
* This works *only* for the ring descriptors
*/
#define LANCE_ADDR(x) (PHYSADDR(x) >> 1)
struct lance_private {
char *name;
volatile struct lance_regs *ll;
volatile struct lance_init_block *init_block;
volatile unsigned long *dma_ptr_reg;
spinlock_t lock;
int rx_new, tx_new;
int rx_old, tx_old;
struct net_device_stats stats;
unsigned short busmaster_regval;
struct net_device *dev; /* Backpointer */
struct lance_private *next_module;
struct timer_list multicast_timer;
/* Pointers to the ring buffers as seen from the CPU */
char *rx_buf_ptr_cpu[RX_RING_SIZE];
char *tx_buf_ptr_cpu[TX_RING_SIZE];
/* Pointers to the ring buffers as seen from the LANCE */
char *rx_buf_ptr_lnc[RX_RING_SIZE];
char *tx_buf_ptr_lnc[TX_RING_SIZE];
};
#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)
/* The lance control ports are at an absolute address, machine and tc-slot
* dependant.
* DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
* so we have to give the structure an extra member making rap pointing
* at the right address
*/
struct lance_regs {
volatile unsigned short rdp; /* register data port */
unsigned short pad;
volatile unsigned short rap; /* register address port */
};
int dec_lance_debug = 2;
/*
#ifdef MODULE
static struct lance_private *root_lance_dev = NULL;
#endif
*/
static inline void writereg(volatile unsigned short *regptr, short value)
{
*regptr = value;
wbflush();
}
/* Load the CSR registers */
static void load_csrs(struct lance_private *lp)
{
volatile struct lance_regs *ll = lp->ll;
int leptr;
/* The address space as seen from the LANCE
* begins at address 0. HK
*/
leptr = 0;
writereg(&ll->rap, LE_CSR1);
writereg(&ll->rdp, (leptr & 0xFFFF));
writereg(&ll->rap, LE_CSR2);
writereg(&ll->rdp, leptr >> 16);
writereg(&ll->rap, LE_CSR3);
writereg(&ll->rdp, lp->busmaster_regval);
/* Point back to csr0 */
writereg(&ll->rap, LE_CSR0);
}
/*
* Our specialized copy routines
*
*/
void cp_to_buf(void *to, const void *from, __kernel_size_t len)
{
unsigned short *tp, *fp, clen;
unsigned char *rtp, *rfp;
if (type == PMAX_LANCE) {
clen = len >> 1;
tp = (unsigned short *) to;
fp = (unsigned short *) from;
while (clen--) {
*tp++ = *fp++;
tp++;
}
clen = len & 1;
rtp = (unsigned char *) tp;
rfp = (unsigned char *) fp;
while (clen--) {
*rtp++ = *rfp++;
}
} else {
/*
* copy 16 Byte chunks
*/
clen = len >> 4;
tp = (unsigned short *) to;
fp = (unsigned short *) from;
while (clen--) {
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
tp += 8;
}
/*
* do the rest, if any.
*/
clen = len & 15;
rtp = (unsigned char *) tp;
rfp = (unsigned char *) fp;
while (clen--) {
*rtp++ = *rfp++;
}
}
wbflush();
}
void cp_from_buf(void *to, unsigned char *from, int len)
{
unsigned short *tp, *fp, clen;
unsigned char *rtp, *rfp;
if (type == PMAX_LANCE) {
clen = len >> 1;
tp = (unsigned short *) to;
fp = (unsigned short *) from;
while (clen--) {
*tp++ = *fp++;
fp++;
}
clen = len & 1;
rtp = (unsigned char *) tp;
rfp = (unsigned char *) fp;
while (clen--) {
*rtp++ = *rfp++;
}
} else {
/*
* copy 16 Byte chunks
*/
clen = len >> 4;
tp = (unsigned short *) to;
fp = (unsigned short *) from;
while (clen--) {
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
*tp++ = *fp++;
fp += 8;
}
/*
* do the rest, if any.
*/
clen = len & 15;
rtp = (unsigned char *) tp;
rfp = (unsigned char *) fp;
while (clen--) {
*rtp++ = *rfp++;
}
}
}
/* Setup the Lance Rx and Tx rings */
static void lance_init_ring(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_init_block *ib;
int leptr;
int i;
ib = (struct lance_init_block *) (dev->mem_start);
/* 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.
* XXX bit 0 of the physical address registers has to be zero
*/
ib->phys_addr[0] = dev->dev_addr[0];
ib->phys_addr[1] = dev->dev_addr[1];
ib->phys_addr[4] = dev->dev_addr[2];
ib->phys_addr[5] = dev->dev_addr[3];
ib->phys_addr[8] = dev->dev_addr[4];
ib->phys_addr[9] = dev->dev_addr[5];
/* Setup the initialization block */
/* Setup rx descriptor pointer */
leptr = LANCE_ADDR(libdesc_offset(brx_ring, 0));
ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
ib->rx_ptr = leptr;
if (ZERO)
printk("RX ptr: %8.8x(%8.8x)\n", leptr, libdesc_offset(brx_ring, 0));
/* Setup tx descriptor pointer */
leptr = LANCE_ADDR(libdesc_offset(btx_ring, 0));
ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
ib->tx_ptr = leptr;
if (ZERO)
printk("TX ptr: %8.8x(%8.8x)\n", leptr, libdesc_offset(btx_ring, 0));
if (ZERO)
printk("TX rings:\n");
/* Setup the Tx ring entries */
for (i = 0; i < TX_RING_SIZE; i++) {
leptr = (int) lp->tx_buf_ptr_lnc[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;
if (i < 3 && ZERO)
printk("%d: 0x%8.8x(0x%8.8x)\n", i, leptr, (int) lp->tx_buf_ptr_cpu[i]);
}
/* Setup the Rx ring entries */
if (ZERO)
printk("RX rings:\n");
for (i = 0; i < RX_RING_SIZE; i++) {
leptr = (int) lp->rx_buf_ptr_lnc[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;
if (i < 3 && ZERO)
printk("%d: 0x%8.8x(0x%8.8x)\n", i, leptr, (int) lp->rx_buf_ptr_cpu[i]);
}
wbflush();
}
static int init_restart_lance(struct lance_private *lp)
{
volatile struct lance_regs *ll = lp->ll;
int i;
writereg(&ll->rap, LE_CSR0);
writereg(&ll->rdp, LE_C0_INIT);
/* Wait for the lance to complete initialization */
for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
udelay(10);
}
if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, ll->rdp);
return -1;
}
if ((ll->rdp & LE_C0_ERR)) {
printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, ll->rdp);
return -1;
}
writereg(&ll->rdp, LE_C0_IDON);
writereg(&ll->rdp, LE_C0_STRT);
writereg(&ll->rdp, LE_C0_INEA);
return 0;
}
static int lance_rx(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_init_block *ib;
volatile struct lance_rx_desc *rd = 0;
unsigned char bits;
int len = 0;
struct sk_buff *skb = 0;
ib = (struct lance_init_block *) (dev->mem_start);
#ifdef TEST_HITS
{
int i;
printk("[");
for (i = 0; i < RX_RING_SIZE; i++) {
if (i == lp->rx_new)
printk("%s",
ib->brx_ring[i].rmd1_bits & LE_R1_OWN ? "_" : "X");
else
printk("%s",
ib->brx_ring[i].rmd1_bits & LE_R1_OWN ? "." : "1");
}
printk("]");
}
#endif
for (rd = &ib->brx_ring[lp->rx_new];
!((bits = rd->rmd1_bits) & LE_R1_OWN);
rd = &ib->brx_ring[lp->rx_new]) {
/* We got an incomplete frame? */
if ((bits & LE_R1_POK) != LE_R1_POK) {
lp->stats.rx_over_errors++;
lp->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)
lp->stats.rx_fifo_errors++;
if (bits & LE_R1_CRC)
lp->stats.rx_crc_errors++;
if (bits & LE_R1_OFL)
lp->stats.rx_over_errors++;
if (bits & LE_R1_FRA)
lp->stats.rx_frame_errors++;
if (bits & LE_R1_EOP)
lp->stats.rx_errors++;
} else {
len = (rd->mblength & 0xfff) - 4;
skb = dev_alloc_skb(len + 2);
if (skb == 0) {
printk("%s: Memory squeeze, deferring packet.\n",
dev->name);
lp->stats.rx_dropped++;
rd->mblength = 0;
rd->rmd1_bits = LE_R1_OWN;
lp->rx_new = (lp->rx_new + 1) & RX_RING_MOD_MASK;
return 0;
}
lp->stats.rx_bytes += len;
skb->dev = dev;
skb_reserve(skb, 2); /* 16 byte align */
skb_put(skb, len); /* make room */
cp_from_buf(skb->data,
(char *) lp->rx_buf_ptr_cpu[lp->rx_new],
len);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->last_rx = jiffies;
lp->stats.rx_packets++;
}
/* Return the packet to the pool */
rd->mblength = 0;
rd->length = -RX_BUFF_SIZE | 0xf000;
rd->rmd1_bits = LE_R1_OWN;
lp->rx_new = (lp->rx_new + 1) & RX_RING_MOD_MASK;
}
return 0;
}
static void lance_tx(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_init_block *ib;
volatile struct lance_regs *ll = lp->ll;
volatile struct lance_tx_desc *td;
int i, j;
int status;
ib = (struct lance_init_block *) (dev->mem_start);
j = lp->tx_old;
spin_lock(&lp->lock);
for (i = j; i != lp->tx_new; i = j) {
td = &ib->btx_ring[i];
/* If we hit a packet not owned by us, stop */
if (td->tmd1_bits & LE_T1_OWN)
break;
if (td->tmd1_bits & LE_T1_ERR) {
status = td->misc;
lp->stats.tx_errors++;
if (status & LE_T3_RTY)
lp->stats.tx_aborted_errors++;
if (status & LE_T3_LCOL)
lp->stats.tx_window_errors++;
if (status & LE_T3_CLOS) {
lp->stats.tx_carrier_errors++;
printk("%s: Carrier Lost\n", dev->name);
/* Stop the lance */
writereg(&ll->rap, LE_CSR0);
writereg(&ll->rdp, LE_C0_STOP);
lance_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)) {
lp->stats.tx_fifo_errors++;
printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
dev->name);
/* Stop the lance */
writereg(&ll->rap, LE_CSR0);
writereg(&ll->rdp, LE_C0_STOP);
lance_init_ring(dev);
load_csrs(lp);
init_restart_lance(lp);
goto out;
}
} else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
/*
* So we don't count the packet more than once.
*/
td->tmd1_bits &= ~(LE_T1_POK);
/* One collision before packet was sent. */
if (td->tmd1_bits & LE_T1_EONE)
lp->stats.collisions++;
/* More than one collision, be optimistic. */
if (td->tmd1_bits & LE_T1_EMORE)
lp->stats.collisions += 2;
lp->stats.tx_packets++;
}
j = (j + 1) & TX_RING_MOD_MASK;
}
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_interrupt(const int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_regs *ll = lp->ll;
int csr0;
writereg(&ll->rap, LE_CSR0);
csr0 = ll->rdp;
/* Acknowledge all the interrupt sources ASAP */
writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
if ((csr0 & LE_C0_ERR)) {
/* Clear the error condition */
writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
LE_C0_CERR | LE_C0_MERR);
}
if (csr0 & LE_C0_RINT)
lance_rx(dev);
if (csr0 & LE_C0_TINT)
lance_tx(dev);
if (csr0 & LE_C0_BABL)
lp->stats.tx_errors++;
if (csr0 & LE_C0_MISS)
lp->stats.rx_errors++;
if (csr0 & LE_C0_MERR) {
volatile unsigned long int_stat = *(unsigned long *) (system_base + IOCTL + SIR);
printk("%s: Memory error, status %04x\n", dev->name, csr0);
if (int_stat & LANCE_DMA_MEMRDERR) {
printk("%s: DMA error\n", dev->name);
int_stat |= LANCE_DMA_MEMRDERR;
/*
* re-enable LANCE DMA
*/
*(unsigned long *) (system_base + IOCTL + SSR) |= (1 << 16);
wbflush();
}
writereg(&ll->rdp, LE_C0_STOP);
lance_init_ring(dev);
load_csrs(lp);
init_restart_lance(lp);
netif_wake_queue(dev);
}
writereg(&ll->rdp, LE_C0_INEA);
writereg(&ll->rdp, LE_C0_INEA);
}
struct net_device *last_dev = 0;
static int lance_open(struct net_device *dev)
{
volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_regs *ll = lp->ll;
int status = 0;
last_dev = dev;
/* Stop the Lance */
writereg(&ll->rap, LE_CSR0);
writereg(&ll->rdp, LE_C0_STOP);
/* 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
*/
ib->mode = 0;
ib->filter [0] = 0;
ib->filter [2] = 0;
lance_init_ring(dev);
load_csrs(lp);
netif_start_queue(dev);
/* Associate IRQ with lance_interrupt */
if (request_irq(dev->irq, &lance_interrupt, 0, lp->name, dev)) {
printk("Lance: Can't get irq %d\n", dev->irq);
return -EAGAIN;
}
status = init_restart_lance(lp);
/*
* if (!status)
* MOD_INC_USE_COUNT;
*/
return status;
}
static int lance_close(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_regs *ll = lp->ll;
netif_stop_queue(dev);
del_timer_sync(&lp->multicast_timer);
/* Stop the card */
writereg(&ll->rap, LE_CSR0);
writereg(&ll->rdp, LE_C0_STOP);
free_irq(dev->irq, (void *) dev);
/*
MOD_DEC_USE_COUNT;
*/
return 0;
}
static inline int lance_reset(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_regs *ll = lp->ll;
int status;
/* Stop the lance */
writereg(&ll->rap, LE_CSR0);
writereg(&ll->rdp, LE_C0_STOP);
lance_init_ring(dev);
load_csrs(lp);
dev->trans_start = jiffies;
status = init_restart_lance(lp);
return status;
}
static void lance_tx_timeout(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_regs *ll = lp->ll;
printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
dev->name, ll->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 = (struct lance_private *) dev->priv;
volatile struct lance_regs *ll = lp->ll;
volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
int entry, skblen, len;
skblen = skb->len;
len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
lp->stats.tx_bytes += len;
entry = lp->tx_new & TX_RING_MOD_MASK;
ib->btx_ring[entry].length = (-len);
ib->btx_ring[entry].misc = 0;
cp_to_buf((char *) lp->tx_buf_ptr_cpu[entry], skb->data, skblen);
/* Clear the slack of the packet, do I need this? */
/* For a firewall its a good idea - AC */
/*
if (len != skblen)
memset ((char *) &ib->tx_buf [entry][skblen], 0, (len - skblen) << 1);
*/
/* Now, give the packet to the lance */
ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
lp->tx_new = (lp->tx_new + 1) & TX_RING_MOD_MASK;
if (TX_BUFFS_AVAIL <= 0)
netif_stop_queue(dev);
/* Kick the lance: transmit now */
writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
spin_unlock_irq(&lp->lock);
dev->trans_start = jiffies;
dev_kfree_skb(skb);
return 0;
}
static struct net_device_stats *lance_get_stats(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
return &lp->stats;
}
static void lance_load_multicast(struct net_device *dev)
{
volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
volatile u16 *mcast_table = (u16 *) & ib->filter;
struct dev_mc_list *dmi = dev->mc_list;
char *addrs;
int i, j, bit, byte;
u32 crc, poly = CRC_POLYNOMIAL_BE;
/* set all multicast bits */
if (dev->flags & IFF_ALLMULTI) {
ib->filter[0] = 0xffff;
ib->filter[2] = 0xffff;
ib->filter[4] = 0xffff;
ib->filter[6] = 0xffff;
return;
}
/* clear the multicast filter */
ib->filter[0] = 0;
ib->filter[2] = 0;
ib->filter[4] = 0;
ib->filter[6] = 0;
/* Add addresses */
for (i = 0; i < dev->mc_count; i++) {
addrs = dmi->dmi_addr;
dmi = dmi->next;
/* multicast address? */
if (!(*addrs & 1))
continue;
crc = 0xffffffff;
for (byte = 0; byte < 6; byte++)
for (bit = *addrs++, j = 0; j < 8; j++, bit >>= 1) {
int test;
test = ((bit ^ crc) & 0x01);
crc >>= 1;
if (test) {
crc = crc ^ poly;
}
}
crc = crc >> 26;
mcast_table[crc >> 3] |= 1 << (crc & 0xf);
}
return;
}
static void lance_set_multicast(struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->priv;
volatile struct lance_init_block *ib;
volatile struct lance_regs *ll = lp->ll;
ib = (struct lance_init_block *) (dev->mem_start);
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);
writereg(&ll->rap, LE_CSR0);
writereg(&ll->rdp, LE_C0_STOP);
lance_init_ring(dev);
if (dev->flags & IFF_PROMISC) {
ib->mode |= LE_MO_PROM;
} else {
ib->mode &= ~LE_MO_PROM;
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 int __init dec_lance_init(struct net_device *dev, const int type)
{
static unsigned version_printed;
struct net_device *dev;
struct lance_private *lp;
volatile struct lance_regs *ll;
int i, ret;
unsigned long esar_base;
unsigned char *esar;
#ifndef CONFIG_TC
system_base = KN01_LANCE_BASE;
#else
int slot;
#endif
if (dec_lance_debug && version_printed++ == 0)
printk(version);
dev = init_etherdev(0, sizeof(struct lance_private));
if (!dev)
return -ENOMEM;
/* init_etherdev ensures the data structures used by the LANCE are aligned. */
lp = (struct lance_private *) dev->priv;
spin_lock_init(&lp->lock);
switch (type) {
#ifdef CONFIG_TC
case ASIC_LANCE:
dev->base_addr = system_base + LANCE;
/* buffer space for the on-board LANCE shared memory */
/*
* FIXME: ugly hack!
*/
dev->mem_start = KSEG1ADDR(0x00020000);
dev->mem_end = dev->mem_start + 0x00020000;
dev->irq = ETHER;
esar_base = system_base + ESAR;
/* Workaround crash with booting KN04 2.1k from Disk */
memset(dev->mem_start, 0, dev->mem_end - dev->mem_start);
/*
* setup the pointer arrays, this sucks [tm] :-(
*/
for (i = 0; i < RX_RING_SIZE; i++) {
lp->rx_buf_ptr_cpu[i] = (char *) (dev->mem_start + BUF_OFFSET_CPU
+ 2 * i * RX_BUFF_SIZE);
lp->rx_buf_ptr_lnc[i] = (char *) (BUF_OFFSET_LNC
+ i * RX_BUFF_SIZE);
}
for (i = 0; i < TX_RING_SIZE; i++) {
lp->tx_buf_ptr_cpu[i] = (char *) (dev->mem_start + BUF_OFFSET_CPU
+ 2 * RX_RING_SIZE * RX_BUFF_SIZE
+ 2 * i * TX_BUFF_SIZE);
lp->tx_buf_ptr_lnc[i] = (char *) (BUF_OFFSET_LNC
+ RX_RING_SIZE * RX_BUFF_SIZE
+ i * TX_BUFF_SIZE);
}
/*
* setup and enable IOASIC LANCE DMA
*/
lp->dma_ptr_reg = (unsigned long *) (system_base + IOCTL + LANCE_DMA_P);
*(lp->dma_ptr_reg) = PHYSADDR(dev->mem_start) << 3;
*(unsigned long *) (system_base + IOCTL + SSR) |= (1 << 16);
wbflush();
break;
case PMAD_LANCE:
slot = search_tc_card("PMAD-AA");
claim_tc_card(slot);
dev->mem_start = get_tc_base_addr(slot);
dev->base_addr = dev->mem_start + 0x100000;
dev->irq = get_tc_irq_nr(slot);
esar_base = dev->mem_start + 0x1c0002;
break;
#endif
case PMAX_LANCE:
dev->irq = ETHER;
dev->base_addr = KN01_LANCE_BASE;
dev->mem_start = KN01_LANCE_BASE + 0x01000000;
esar_base = KN01_RTC_BASE + 1;
/*
* setup the pointer arrays, this sucks [tm] :-(
*/
for (i = 0; i < RX_RING_SIZE; i++) {
lp->rx_buf_ptr_cpu[i] =
(char *) (dev->mem_start + BUF_OFFSET_CPU
+ 2 * i * RX_BUFF_SIZE);
lp->rx_buf_ptr_lnc[i] =
(char *) (BUF_OFFSET_LNC
+ i * RX_BUFF_SIZE);
}
for (i = 0; i < TX_RING_SIZE; i++) {
lp->tx_buf_ptr_cpu[i] =
(char *) (dev->mem_start + BUF_OFFSET_CPU
+ 2 * RX_RING_SIZE * RX_BUFF_SIZE
+ 2 * i * TX_BUFF_SIZE);
lp->tx_buf_ptr_lnc[i] = (char *) (BUF_OFFSET_LNC
+ RX_RING_SIZE * RX_BUFF_SIZE
+ i * TX_BUFF_SIZE);
}
break;
default:
printk("declance_init called with unknown type\n");
ret = -ENODEV;
goto err_out;
}
ll = (struct lance_regs *) dev->base_addr;
esar = (unsigned char *) esar_base;
/* prom checks */
/* First, check for test pattern */
if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
printk("Ethernet station address prom not found!\n");
ret = -ENODEV;
goto err_out;
}
/* Check the prom contents */
for (i = 0; i < 8; i++) {
if (esar[i * 4] != esar[0x3c - i * 4] &&
esar[i * 4] != esar[0x40 + i * 4] &&
esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
printk("Something is wrong with the ethernet "
"station address prom!\n");
ret = -ENODEV;
goto err_out;
}
}
/* Copy the ethernet address to the device structure, later to the
* lance initialization block so the lance gets it every time it's
* (re)initialized.
*/
switch (type) {
case ASIC_LANCE:
printk("%s: IOASIC onboard LANCE, addr = ", dev->name);
break;
case PMAD_LANCE:
printk("%s: PMAD-AA, addr = ", dev->name);
break;
case PMAX_LANCE:
printk("%s: PMAX onboard LANCE, addr = ", dev->name);
break;
}
for (i = 0; i < 6; i++) {
dev->dev_addr[i] = esar[i * 4];
printk("%2.2x%c", dev->dev_addr[i], i == 5 ? ',' : ':');
}
printk(" irq = %d\n", dev->irq);
lp->dev = 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->get_stats = &lance_get_stats;
dev->set_multicast_list = &lance_set_multicast;
/* lp->ll is the location of the registers for lance card */
lp->ll = ll;
lp->name = lancestr;
/* busmaster_regval (CSR3) should be zero according to the PMAD-AA
* specification.
*/
lp->busmaster_regval = 0;
dev->dma = 0;
ether_setup(dev);
/* 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;
#ifdef MODULE
dev->ifindex = dev_new_index();
lp->next_module = root_lance_dev;
root_lance_dev = lp;
#endif
return 0;
err_out:
unregister_netdev(dev);
kfree(dev);
return ret;
}
/* Find all the lance cards on the system and initialize them */
static int __init dec_lance_probe(void)
{
struct net_device *dev = NULL;
static int called;
#ifdef MODULE
root_lance_dev = NULL;
#endif
#ifdef CONFIG_TC
int slot = -1;
if (TURBOCHANNEL) {
if (IOASIC && !called) {
called = 1;
type = ASIC_LANCE;
} else {
if ((slot = search_tc_card("PMAD-AA")) >= 0) {
type = PMAD_LANCE;
} else {
return -ENODEV;
}
}
} else {
if (!called) {
called = 1;
type = PMAX_LANCE;
} else {
return -ENODEV;
}
}
#else
if (!called && !TURBOCHANNEL) {
called = 1;
type = PMAX_LANCE;
} else {
return -ENODEV;
}
#endif
return dec_lance_init(dev, type);
}
static void __exit dec_lance_cleanup(void)
{
#ifdef MODULE
struct lance_private *lp;
while (root_lance_dev) {
lp = root_lance_dev->next_module;
unregister_netdev(root_lance_dev->dev);
kfree(root_lance_dev->dev);
root_lance_dev = lp;
}
#endif /* MODULE */
}
module_init(dec_lance_probe);
module_exit(dec_lance_cleanup);
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