]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/net/ethernet/amd/7990.c
2 * 7990.c -- LANCE ethernet IC generic routines.
3 * This is an attempt to separate out the bits of various ethernet
4 * drivers that are common because they all use the AMD 7990 LANCE
5 * (Local Area Network Controller for Ethernet) chip.
7 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
9 * Most of this stuff was obtained by looking at other LANCE drivers,
10 * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful.
11 * NB: this was made easy by the fact that Jes Sorensen had cleaned up
12 * most of a2025 and sunlance with the aim of merging them, so the
13 * common code was pretty obvious.
15 #include <linux/crc32.h>
16 #include <linux/delay.h>
17 #include <linux/errno.h>
18 #include <linux/netdevice.h>
19 #include <linux/etherdevice.h>
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/types.h>
24 #include <linux/fcntl.h>
25 #include <linux/interrupt.h>
26 #include <linux/ioport.h>
28 #include <linux/route.h>
29 #include <linux/string.h>
30 #include <linux/skbuff.h>
32 /* Used for the temporal inet entries and routing */
33 #include <linux/socket.h>
34 #include <linux/bitops.h>
38 #include <asm/pgtable.h>
40 #include <asm/blinken.h>
45 #define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x))
46 #define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x))
47 #define READRDP(lp) in_be16(lp->base + LANCE_RDP)
49 #if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE)
56 #if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE)
58 /* Lossage Factor Nine, Mr Sulu. */
59 #define WRITERAP(lp,x) (lp->writerap(lp,x))
60 #define WRITERDP(lp,x) (lp->writerdp(lp,x))
61 #define READRDP(lp) (lp->readrdp(lp))
65 /* These inlines can be used if only CONFIG_HPLANCE is defined */
66 static inline void WRITERAP(struct lance_private
*lp
, __u16 value
)
69 out_be16(lp
->base
+ HPLANCE_REGOFF
+ LANCE_RAP
, value
);
70 } while ((in_8(lp
->base
+ HPLANCE_STATUS
) & LE_ACK
) == 0);
73 static inline void WRITERDP(struct lance_private
*lp
, __u16 value
)
76 out_be16(lp
->base
+ HPLANCE_REGOFF
+ LANCE_RDP
, value
);
77 } while ((in_8(lp
->base
+ HPLANCE_STATUS
) & LE_ACK
) == 0);
80 static inline __u16
READRDP(struct lance_private
*lp
)
84 value
= in_be16(lp
->base
+ HPLANCE_REGOFF
+ LANCE_RDP
);
85 } while ((in_8(lp
->base
+ HPLANCE_STATUS
) & LE_ACK
) == 0);
90 #endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */
92 /* debugging output macros, various flavours */
93 /* #define TEST_HITS */
95 #define PRINT_RINGS() \
98 for (t=0; t < RX_RING_SIZE; t++) { \
99 printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\
100 t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\
101 ib->brx_ring[t].length,\
102 ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\
104 for (t=0; t < TX_RING_SIZE; t++) { \
105 printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\
106 t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\
107 ib->btx_ring[t].length,\
108 ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\
112 #define PRINT_RINGS()
115 /* Load the CSR registers. The LANCE has to be STOPped when we do this! */
116 static void load_csrs (struct lance_private
*lp
)
118 volatile struct lance_init_block
*aib
= lp
->lance_init_block
;
121 leptr
= LANCE_ADDR (aib
);
123 WRITERAP(lp
, LE_CSR1
); /* load address of init block */
124 WRITERDP(lp
, leptr
& 0xFFFF);
125 WRITERAP(lp
, LE_CSR2
);
126 WRITERDP(lp
, leptr
>> 16);
127 WRITERAP(lp
, LE_CSR3
);
128 WRITERDP(lp
, lp
->busmaster_regval
); /* set byteswap/ALEctrl/byte ctrl */
130 /* Point back to csr0 */
131 WRITERAP(lp
, LE_CSR0
);
134 /* #define to 0 or 1 appropriately */
135 #define DEBUG_IRING 0
136 /* Set up the Lance Rx and Tx rings and the init block */
137 static void lance_init_ring (struct net_device
*dev
)
139 struct lance_private
*lp
= netdev_priv(dev
);
140 volatile struct lance_init_block
*ib
= lp
->init_block
;
141 volatile struct lance_init_block
*aib
; /* for LANCE_ADDR computations */
145 aib
= lp
->lance_init_block
;
147 lp
->rx_new
= lp
->tx_new
= 0;
148 lp
->rx_old
= lp
->tx_old
= 0;
150 ib
->mode
= LE_MO_PROM
; /* normal, enable Tx & Rx */
152 /* Copy the ethernet address to the lance init block
153 * Notice that we do a byteswap if we're big endian.
154 * [I think this is the right criterion; at least, sunlance,
155 * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
156 * However, the datasheet says that the BSWAP bit doesn't affect
157 * the init block, so surely it should be low byte first for
159 * We could define the ib->physaddr as three 16bit values and
160 * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
163 ib
->phys_addr
[0] = dev
->dev_addr
[1];
164 ib
->phys_addr
[1] = dev
->dev_addr
[0];
165 ib
->phys_addr
[2] = dev
->dev_addr
[3];
166 ib
->phys_addr
[3] = dev
->dev_addr
[2];
167 ib
->phys_addr
[4] = dev
->dev_addr
[5];
168 ib
->phys_addr
[5] = dev
->dev_addr
[4];
171 ib
->phys_addr
[i
] = dev
->dev_addr
[i
];
175 printk ("TX rings:\n");
178 /* Setup the Tx ring entries */
179 for (i
= 0; i
< (1<<lp
->lance_log_tx_bufs
); i
++) {
180 leptr
= LANCE_ADDR(&aib
->tx_buf
[i
][0]);
181 ib
->btx_ring
[i
].tmd0
= leptr
;
182 ib
->btx_ring
[i
].tmd1_hadr
= leptr
>> 16;
183 ib
->btx_ring
[i
].tmd1_bits
= 0;
184 ib
->btx_ring
[i
].length
= 0xf000; /* The ones required by tmd2 */
185 ib
->btx_ring
[i
].misc
= 0;
187 printk ("%d: 0x%8.8x\n", i
, leptr
);
190 /* Setup the Rx ring entries */
192 printk ("RX rings:\n");
193 for (i
= 0; i
< (1<<lp
->lance_log_rx_bufs
); i
++) {
194 leptr
= LANCE_ADDR(&aib
->rx_buf
[i
][0]);
196 ib
->brx_ring
[i
].rmd0
= leptr
;
197 ib
->brx_ring
[i
].rmd1_hadr
= leptr
>> 16;
198 ib
->brx_ring
[i
].rmd1_bits
= LE_R1_OWN
;
199 /* 0xf000 == bits that must be one (reserved, presumably) */
200 ib
->brx_ring
[i
].length
= -RX_BUFF_SIZE
| 0xf000;
201 ib
->brx_ring
[i
].mblength
= 0;
203 printk ("%d: 0x%8.8x\n", i
, leptr
);
206 /* Setup the initialization block */
208 /* Setup rx descriptor pointer */
209 leptr
= LANCE_ADDR(&aib
->brx_ring
);
210 ib
->rx_len
= (lp
->lance_log_rx_bufs
<< 13) | (leptr
>> 16);
213 printk ("RX ptr: %8.8x\n", leptr
);
215 /* Setup tx descriptor pointer */
216 leptr
= LANCE_ADDR(&aib
->btx_ring
);
217 ib
->tx_len
= (lp
->lance_log_tx_bufs
<< 13) | (leptr
>> 16);
220 printk ("TX ptr: %8.8x\n", leptr
);
222 /* Clear the multicast filter */
228 /* LANCE must be STOPped before we do this, too... */
229 static int init_restart_lance (struct lance_private
*lp
)
233 WRITERAP(lp
, LE_CSR0
);
234 WRITERDP(lp
, LE_C0_INIT
);
236 /* Need a hook here for sunlance ledma stuff */
238 /* Wait for the lance to complete initialization */
239 for (i
= 0; (i
< 100) && !(READRDP(lp
) & (LE_C0_ERR
| LE_C0_IDON
)); i
++)
241 if ((i
== 100) || (READRDP(lp
) & LE_C0_ERR
)) {
242 printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i
, READRDP(lp
));
246 /* Clear IDON by writing a "1", enable interrupts and start lance */
247 WRITERDP(lp
, LE_C0_IDON
);
248 WRITERDP(lp
, LE_C0_INEA
| LE_C0_STRT
);
253 static int lance_reset (struct net_device
*dev
)
255 struct lance_private
*lp
= netdev_priv(dev
);
259 WRITERAP(lp
, LE_CSR0
);
260 WRITERDP(lp
, LE_C0_STOP
);
263 lance_init_ring (dev
);
264 dev
->trans_start
= jiffies
; /* prevent tx timeout */
265 status
= init_restart_lance (lp
);
267 printk ("Lance restart=%d\n", status
);
272 static int lance_rx (struct net_device
*dev
)
274 struct lance_private
*lp
= netdev_priv(dev
);
275 volatile struct lance_init_block
*ib
= lp
->init_block
;
276 volatile struct lance_rx_desc
*rd
;
284 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
287 ib
->brx_ring
[i
].rmd1_bits
& LE_R1_OWN
? "_" : "X");
290 ib
->brx_ring
[i
].rmd1_bits
& LE_R1_OWN
? "." : "1");
295 blinken_leds(0x40, 0);
297 WRITERDP(lp
, LE_C0_RINT
| LE_C0_INEA
); /* ack Rx int, reenable ints */
298 for (rd
= &ib
->brx_ring
[lp
->rx_new
]; /* For each Rx ring we own... */
299 !((bits
= rd
->rmd1_bits
) & LE_R1_OWN
);
300 rd
= &ib
->brx_ring
[lp
->rx_new
]) {
302 /* We got an incomplete frame? */
303 if ((bits
& LE_R1_POK
) != LE_R1_POK
) {
304 dev
->stats
.rx_over_errors
++;
305 dev
->stats
.rx_errors
++;
307 } else if (bits
& LE_R1_ERR
) {
308 /* Count only the end frame as a rx error,
311 if (bits
& LE_R1_BUF
) dev
->stats
.rx_fifo_errors
++;
312 if (bits
& LE_R1_CRC
) dev
->stats
.rx_crc_errors
++;
313 if (bits
& LE_R1_OFL
) dev
->stats
.rx_over_errors
++;
314 if (bits
& LE_R1_FRA
) dev
->stats
.rx_frame_errors
++;
315 if (bits
& LE_R1_EOP
) dev
->stats
.rx_errors
++;
317 int len
= (rd
->mblength
& 0xfff) - 4;
318 struct sk_buff
*skb
= netdev_alloc_skb(dev
, len
+ 2);
321 dev
->stats
.rx_dropped
++;
323 rd
->rmd1_bits
= LE_R1_OWN
;
324 lp
->rx_new
= (lp
->rx_new
+ 1) & lp
->rx_ring_mod_mask
;
328 skb_reserve (skb
, 2); /* 16 byte align */
329 skb_put (skb
, len
); /* make room */
330 skb_copy_to_linear_data(skb
,
331 (unsigned char *)&(ib
->rx_buf
[lp
->rx_new
][0]),
333 skb
->protocol
= eth_type_trans (skb
, dev
);
335 dev
->stats
.rx_packets
++;
336 dev
->stats
.rx_bytes
+= len
;
339 /* Return the packet to the pool */
341 rd
->rmd1_bits
= LE_R1_OWN
;
342 lp
->rx_new
= (lp
->rx_new
+ 1) & lp
->rx_ring_mod_mask
;
347 static int lance_tx (struct net_device
*dev
)
349 struct lance_private
*lp
= netdev_priv(dev
);
350 volatile struct lance_init_block
*ib
= lp
->init_block
;
351 volatile struct lance_tx_desc
*td
;
356 blinken_leds(0x80, 0);
359 WRITERDP(lp
, LE_C0_TINT
| LE_C0_INEA
);
363 for (i
= j
; i
!= lp
->tx_new
; i
= j
) {
364 td
= &ib
->btx_ring
[i
];
366 /* If we hit a packet not owned by us, stop */
367 if (td
->tmd1_bits
& LE_T1_OWN
)
370 if (td
->tmd1_bits
& LE_T1_ERR
) {
373 dev
->stats
.tx_errors
++;
374 if (status
& LE_T3_RTY
) dev
->stats
.tx_aborted_errors
++;
375 if (status
& LE_T3_LCOL
) dev
->stats
.tx_window_errors
++;
377 if (status
& LE_T3_CLOS
) {
378 dev
->stats
.tx_carrier_errors
++;
379 if (lp
->auto_select
) {
380 lp
->tpe
= 1 - lp
->tpe
;
381 printk("%s: Carrier Lost, trying %s\n",
382 dev
->name
, lp
->tpe
?"TPE":"AUI");
384 WRITERAP(lp
, LE_CSR0
);
385 WRITERDP(lp
, LE_C0_STOP
);
386 lance_init_ring (dev
);
388 init_restart_lance (lp
);
393 /* buffer errors and underflows turn off the transmitter */
394 /* Restart the adapter */
395 if (status
& (LE_T3_BUF
|LE_T3_UFL
)) {
396 dev
->stats
.tx_fifo_errors
++;
398 printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
401 WRITERAP(lp
, LE_CSR0
);
402 WRITERDP(lp
, LE_C0_STOP
);
403 lance_init_ring (dev
);
405 init_restart_lance (lp
);
408 } else if ((td
->tmd1_bits
& LE_T1_POK
) == LE_T1_POK
) {
410 * So we don't count the packet more than once.
412 td
->tmd1_bits
&= ~(LE_T1_POK
);
414 /* One collision before packet was sent. */
415 if (td
->tmd1_bits
& LE_T1_EONE
)
416 dev
->stats
.collisions
++;
418 /* More than one collision, be optimistic. */
419 if (td
->tmd1_bits
& LE_T1_EMORE
)
420 dev
->stats
.collisions
+= 2;
422 dev
->stats
.tx_packets
++;
425 j
= (j
+ 1) & lp
->tx_ring_mod_mask
;
428 WRITERDP(lp
, LE_C0_TINT
| LE_C0_INEA
);
433 lance_interrupt (int irq
, void *dev_id
)
435 struct net_device
*dev
= (struct net_device
*)dev_id
;
436 struct lance_private
*lp
= netdev_priv(dev
);
439 spin_lock (&lp
->devlock
);
441 WRITERAP(lp
, LE_CSR0
); /* LANCE Controller Status */
446 if (!(csr0
& LE_C0_INTR
)) { /* Check if any interrupt has */
447 spin_unlock (&lp
->devlock
);
448 return IRQ_NONE
; /* been generated by the Lance. */
451 /* Acknowledge all the interrupt sources ASAP */
452 WRITERDP(lp
, csr0
& ~(LE_C0_INEA
|LE_C0_TDMD
|LE_C0_STOP
|LE_C0_STRT
|LE_C0_INIT
));
454 if ((csr0
& LE_C0_ERR
)) {
455 /* Clear the error condition */
456 WRITERDP(lp
, LE_C0_BABL
|LE_C0_ERR
|LE_C0_MISS
|LE_C0_INEA
);
459 if (csr0
& LE_C0_RINT
)
462 if (csr0
& LE_C0_TINT
)
465 /* Log misc errors. */
466 if (csr0
& LE_C0_BABL
)
467 dev
->stats
.tx_errors
++; /* Tx babble. */
468 if (csr0
& LE_C0_MISS
)
469 dev
->stats
.rx_errors
++; /* Missed a Rx frame. */
470 if (csr0
& LE_C0_MERR
) {
471 printk("%s: Bus master arbitration failure, status %4.4x.\n",
473 /* Restart the chip. */
474 WRITERDP(lp
, LE_C0_STRT
);
477 if (lp
->tx_full
&& netif_queue_stopped(dev
) && (TX_BUFFS_AVAIL
>= 0)) {
479 netif_wake_queue (dev
);
482 WRITERAP(lp
, LE_CSR0
);
483 WRITERDP(lp
, LE_C0_BABL
|LE_C0_CERR
|LE_C0_MISS
|LE_C0_MERR
|LE_C0_IDON
|LE_C0_INEA
);
485 spin_unlock (&lp
->devlock
);
489 int lance_open (struct net_device
*dev
)
491 struct lance_private
*lp
= netdev_priv(dev
);
494 /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
495 if (request_irq(lp
->irq
, lance_interrupt
, IRQF_SHARED
, lp
->name
, dev
))
498 res
= lance_reset(dev
);
499 spin_lock_init(&lp
->devlock
);
500 netif_start_queue (dev
);
504 EXPORT_SYMBOL_GPL(lance_open
);
506 int lance_close (struct net_device
*dev
)
508 struct lance_private
*lp
= netdev_priv(dev
);
510 netif_stop_queue (dev
);
513 WRITERAP(lp
, LE_CSR0
);
514 WRITERDP(lp
, LE_C0_STOP
);
516 free_irq(lp
->irq
, dev
);
520 EXPORT_SYMBOL_GPL(lance_close
);
522 void lance_tx_timeout(struct net_device
*dev
)
524 printk("lance_tx_timeout\n");
526 dev
->trans_start
= jiffies
; /* prevent tx timeout */
527 netif_wake_queue (dev
);
529 EXPORT_SYMBOL_GPL(lance_tx_timeout
);
531 int lance_start_xmit (struct sk_buff
*skb
, struct net_device
*dev
)
533 struct lance_private
*lp
= netdev_priv(dev
);
534 volatile struct lance_init_block
*ib
= lp
->init_block
;
535 int entry
, skblen
, len
;
540 return NETDEV_TX_LOCKED
;
542 netif_stop_queue (dev
);
547 /* dump the packet */
551 for (i
= 0; i
< 64; i
++) {
554 printk ("%2.2x ", skb
->data
[i
]);
558 len
= (skblen
<= ETH_ZLEN
) ? ETH_ZLEN
: skblen
;
559 entry
= lp
->tx_new
& lp
->tx_ring_mod_mask
;
560 ib
->btx_ring
[entry
].length
= (-len
) | 0xf000;
561 ib
->btx_ring
[entry
].misc
= 0;
563 if (skb
->len
< ETH_ZLEN
)
564 memset((void *)&ib
->tx_buf
[entry
][0], 0, ETH_ZLEN
);
565 skb_copy_from_linear_data(skb
, (void *)&ib
->tx_buf
[entry
][0], skblen
);
567 /* Now, give the packet to the lance */
568 ib
->btx_ring
[entry
].tmd1_bits
= (LE_T1_POK
|LE_T1_OWN
);
569 lp
->tx_new
= (lp
->tx_new
+1) & lp
->tx_ring_mod_mask
;
572 /* Kick the lance: transmit now */
573 WRITERDP(lp
, LE_C0_INEA
| LE_C0_TDMD
);
576 spin_lock_irqsave (&lp
->devlock
, flags
);
578 netif_start_queue (dev
);
581 spin_unlock_irqrestore (&lp
->devlock
, flags
);
585 EXPORT_SYMBOL_GPL(lance_start_xmit
);
587 /* taken from the depca driver via a2065.c */
588 static void lance_load_multicast (struct net_device
*dev
)
590 struct lance_private
*lp
= netdev_priv(dev
);
591 volatile struct lance_init_block
*ib
= lp
->init_block
;
592 volatile u16
*mcast_table
= (u16
*)&ib
->filter
;
593 struct netdev_hw_addr
*ha
;
596 /* set all multicast bits */
597 if (dev
->flags
& IFF_ALLMULTI
){
598 ib
->filter
[0] = 0xffffffff;
599 ib
->filter
[1] = 0xffffffff;
602 /* clear the multicast filter */
607 netdev_for_each_mc_addr(ha
, dev
) {
608 crc
= ether_crc_le(6, ha
->addr
);
610 mcast_table
[crc
>> 4] |= 1 << (crc
& 0xf);
615 void lance_set_multicast (struct net_device
*dev
)
617 struct lance_private
*lp
= netdev_priv(dev
);
618 volatile struct lance_init_block
*ib
= lp
->init_block
;
621 stopped
= netif_queue_stopped(dev
);
623 netif_stop_queue (dev
);
625 while (lp
->tx_old
!= lp
->tx_new
)
628 WRITERAP(lp
, LE_CSR0
);
629 WRITERDP(lp
, LE_C0_STOP
);
630 lance_init_ring (dev
);
632 if (dev
->flags
& IFF_PROMISC
) {
633 ib
->mode
|= LE_MO_PROM
;
635 ib
->mode
&= ~LE_MO_PROM
;
636 lance_load_multicast (dev
);
639 init_restart_lance (lp
);
642 netif_start_queue (dev
);
644 EXPORT_SYMBOL_GPL(lance_set_multicast
);
646 #ifdef CONFIG_NET_POLL_CONTROLLER
647 void lance_poll(struct net_device
*dev
)
649 struct lance_private
*lp
= netdev_priv(dev
);
651 spin_lock (&lp
->devlock
);
652 WRITERAP(lp
, LE_CSR0
);
653 WRITERDP(lp
, LE_C0_STRT
);
654 spin_unlock (&lp
->devlock
);
655 lance_interrupt(dev
->irq
, dev
);
659 MODULE_LICENSE("GPL");