]>
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/module.h>
21 #include <linux/kernel.h>
22 #include <linux/types.h>
23 #include <linux/fcntl.h>
24 #include <linux/interrupt.h>
25 #include <linux/ioport.h>
27 #include <linux/route.h>
28 #include <linux/string.h>
29 #include <linux/skbuff.h>
31 /* Used for the temporal inet entries and routing */
32 #include <linux/socket.h>
33 #include <linux/bitops.h>
37 #include <asm/pgtable.h>
39 #include <asm/blinken.h>
44 #define WRITERAP(lp, x) out_be16(lp->base + LANCE_RAP, (x))
45 #define WRITERDP(lp, x) out_be16(lp->base + LANCE_RDP, (x))
46 #define READRDP(lp) in_be16(lp->base + LANCE_RDP)
48 #if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE)
55 #if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE)
57 /* Lossage Factor Nine, Mr Sulu. */
58 #define WRITERAP(lp, x) (lp->writerap(lp, x))
59 #define WRITERDP(lp, x) (lp->writerdp(lp, x))
60 #define READRDP(lp) (lp->readrdp(lp))
64 /* These inlines can be used if only CONFIG_HPLANCE is defined */
65 static inline void WRITERAP(struct lance_private
*lp
, __u16 value
)
68 out_be16(lp
->base
+ HPLANCE_REGOFF
+ LANCE_RAP
, value
);
69 } while ((in_8(lp
->base
+ HPLANCE_STATUS
) & LE_ACK
) == 0);
72 static inline void WRITERDP(struct lance_private
*lp
, __u16 value
)
75 out_be16(lp
->base
+ HPLANCE_REGOFF
+ LANCE_RDP
, value
);
76 } while ((in_8(lp
->base
+ HPLANCE_STATUS
) & LE_ACK
) == 0);
79 static inline __u16
READRDP(struct lance_private
*lp
)
83 value
= in_be16(lp
->base
+ HPLANCE_REGOFF
+ LANCE_RDP
);
84 } while ((in_8(lp
->base
+ HPLANCE_STATUS
) & LE_ACK
) == 0);
89 #endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */
91 /* debugging output macros, various flavours */
92 /* #define TEST_HITS */
94 #define PRINT_RINGS() \
97 for (t = 0; t < RX_RING_SIZE; t++) { \
98 printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n", \
99 t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0, \
100 ib->brx_ring[t].length, \
101 ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits); \
103 for (t = 0; t < TX_RING_SIZE; t++) { \
104 printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n", \
105 t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0, \
106 ib->btx_ring[t].length, \
107 ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits); \
111 #define PRINT_RINGS()
114 /* Load the CSR registers. The LANCE has to be STOPped when we do this! */
115 static void load_csrs(struct lance_private
*lp
)
117 volatile struct lance_init_block
*aib
= lp
->lance_init_block
;
120 leptr
= LANCE_ADDR(aib
);
122 WRITERAP(lp
, LE_CSR1
); /* load address of init block */
123 WRITERDP(lp
, leptr
& 0xFFFF);
124 WRITERAP(lp
, LE_CSR2
);
125 WRITERDP(lp
, leptr
>> 16);
126 WRITERAP(lp
, LE_CSR3
);
127 WRITERDP(lp
, lp
->busmaster_regval
); /* set byteswap/ALEctrl/byte ctrl */
129 /* Point back to csr0 */
130 WRITERAP(lp
, LE_CSR0
);
133 /* #define to 0 or 1 appropriately */
134 #define DEBUG_IRING 0
135 /* Set up the Lance Rx and Tx rings and the init block */
136 static void lance_init_ring(struct net_device
*dev
)
138 struct lance_private
*lp
= netdev_priv(dev
);
139 volatile struct lance_init_block
*ib
= lp
->init_block
;
140 volatile struct lance_init_block
*aib
; /* for LANCE_ADDR computations */
144 aib
= lp
->lance_init_block
;
146 lp
->rx_new
= lp
->tx_new
= 0;
147 lp
->rx_old
= lp
->tx_old
= 0;
149 ib
->mode
= LE_MO_PROM
; /* normal, enable Tx & Rx */
151 /* Copy the ethernet address to the lance init block
152 * Notice that we do a byteswap if we're big endian.
153 * [I think this is the right criterion; at least, sunlance,
154 * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
155 * However, the datasheet says that the BSWAP bit doesn't affect
156 * the init block, so surely it should be low byte first for
158 * We could define the ib->physaddr as three 16bit values and
159 * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
162 ib
->phys_addr
[0] = dev
->dev_addr
[1];
163 ib
->phys_addr
[1] = dev
->dev_addr
[0];
164 ib
->phys_addr
[2] = dev
->dev_addr
[3];
165 ib
->phys_addr
[3] = dev
->dev_addr
[2];
166 ib
->phys_addr
[4] = dev
->dev_addr
[5];
167 ib
->phys_addr
[5] = dev
->dev_addr
[4];
169 for (i
= 0; i
< 6; i
++)
170 ib
->phys_addr
[i
] = dev
->dev_addr
[i
];
174 printk("TX rings:\n");
177 /* Setup the Tx ring entries */
178 for (i
= 0; i
< (1 << lp
->lance_log_tx_bufs
); i
++) {
179 leptr
= LANCE_ADDR(&aib
->tx_buf
[i
][0]);
180 ib
->btx_ring
[i
].tmd0
= leptr
;
181 ib
->btx_ring
[i
].tmd1_hadr
= leptr
>> 16;
182 ib
->btx_ring
[i
].tmd1_bits
= 0;
183 ib
->btx_ring
[i
].length
= 0xf000; /* The ones required by tmd2 */
184 ib
->btx_ring
[i
].misc
= 0;
186 printk("%d: 0x%8.8x\n", i
, leptr
);
189 /* Setup the Rx ring entries */
191 printk("RX rings:\n");
192 for (i
= 0; i
< (1 << lp
->lance_log_rx_bufs
); i
++) {
193 leptr
= LANCE_ADDR(&aib
->rx_buf
[i
][0]);
195 ib
->brx_ring
[i
].rmd0
= leptr
;
196 ib
->brx_ring
[i
].rmd1_hadr
= leptr
>> 16;
197 ib
->brx_ring
[i
].rmd1_bits
= LE_R1_OWN
;
198 /* 0xf000 == bits that must be one (reserved, presumably) */
199 ib
->brx_ring
[i
].length
= -RX_BUFF_SIZE
| 0xf000;
200 ib
->brx_ring
[i
].mblength
= 0;
202 printk("%d: 0x%8.8x\n", i
, leptr
);
205 /* Setup the initialization block */
207 /* Setup rx descriptor pointer */
208 leptr
= LANCE_ADDR(&aib
->brx_ring
);
209 ib
->rx_len
= (lp
->lance_log_rx_bufs
<< 13) | (leptr
>> 16);
212 printk("RX ptr: %8.8x\n", leptr
);
214 /* Setup tx descriptor pointer */
215 leptr
= LANCE_ADDR(&aib
->btx_ring
);
216 ib
->tx_len
= (lp
->lance_log_tx_bufs
<< 13) | (leptr
>> 16);
219 printk("TX ptr: %8.8x\n", leptr
);
221 /* Clear the multicast filter */
227 /* LANCE must be STOPped before we do this, too... */
228 static int init_restart_lance(struct lance_private
*lp
)
232 WRITERAP(lp
, LE_CSR0
);
233 WRITERDP(lp
, LE_C0_INIT
);
235 /* Need a hook here for sunlance ledma stuff */
237 /* Wait for the lance to complete initialization */
238 for (i
= 0; (i
< 100) && !(READRDP(lp
) & (LE_C0_ERR
| LE_C0_IDON
)); i
++)
240 if ((i
== 100) || (READRDP(lp
) & LE_C0_ERR
)) {
241 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", i
, READRDP(lp
));
245 /* Clear IDON by writing a "1", enable interrupts and start lance */
246 WRITERDP(lp
, LE_C0_IDON
);
247 WRITERDP(lp
, LE_C0_INEA
| LE_C0_STRT
);
252 static int lance_reset(struct net_device
*dev
)
254 struct lance_private
*lp
= netdev_priv(dev
);
258 WRITERAP(lp
, LE_CSR0
);
259 WRITERDP(lp
, LE_C0_STOP
);
262 lance_init_ring(dev
);
263 dev
->trans_start
= jiffies
; /* prevent tx timeout */
264 status
= init_restart_lance(lp
);
266 printk("Lance restart=%d\n", status
);
271 static int lance_rx(struct net_device
*dev
)
273 struct lance_private
*lp
= netdev_priv(dev
);
274 volatile struct lance_init_block
*ib
= lp
->init_block
;
275 volatile struct lance_rx_desc
*rd
;
283 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
286 ib
->brx_ring
[i
].rmd1_bits
& LE_R1_OWN
? "_" : "X");
289 ib
->brx_ring
[i
].rmd1_bits
& LE_R1_OWN
? "." : "1");
294 blinken_leds(0x40, 0);
296 WRITERDP(lp
, LE_C0_RINT
| LE_C0_INEA
); /* ack Rx int, reenable ints */
297 for (rd
= &ib
->brx_ring
[lp
->rx_new
]; /* For each Rx ring we own... */
298 !((bits
= rd
->rmd1_bits
) & LE_R1_OWN
);
299 rd
= &ib
->brx_ring
[lp
->rx_new
]) {
301 /* We got an incomplete frame? */
302 if ((bits
& LE_R1_POK
) != LE_R1_POK
) {
303 dev
->stats
.rx_over_errors
++;
304 dev
->stats
.rx_errors
++;
306 } else if (bits
& LE_R1_ERR
) {
307 /* Count only the end frame as a rx error,
310 if (bits
& LE_R1_BUF
)
311 dev
->stats
.rx_fifo_errors
++;
312 if (bits
& LE_R1_CRC
)
313 dev
->stats
.rx_crc_errors
++;
314 if (bits
& LE_R1_OFL
)
315 dev
->stats
.rx_over_errors
++;
316 if (bits
& LE_R1_FRA
)
317 dev
->stats
.rx_frame_errors
++;
318 if (bits
& LE_R1_EOP
)
319 dev
->stats
.rx_errors
++;
321 int len
= (rd
->mblength
& 0xfff) - 4;
322 struct sk_buff
*skb
= netdev_alloc_skb(dev
, len
+ 2);
325 dev
->stats
.rx_dropped
++;
327 rd
->rmd1_bits
= LE_R1_OWN
;
328 lp
->rx_new
= (lp
->rx_new
+ 1) & lp
->rx_ring_mod_mask
;
332 skb_reserve(skb
, 2); /* 16 byte align */
333 skb_put(skb
, len
); /* make room */
334 skb_copy_to_linear_data(skb
,
335 (unsigned char *)&(ib
->rx_buf
[lp
->rx_new
][0]),
337 skb
->protocol
= eth_type_trans(skb
, dev
);
339 dev
->stats
.rx_packets
++;
340 dev
->stats
.rx_bytes
+= len
;
343 /* Return the packet to the pool */
345 rd
->rmd1_bits
= LE_R1_OWN
;
346 lp
->rx_new
= (lp
->rx_new
+ 1) & lp
->rx_ring_mod_mask
;
351 static int lance_tx(struct net_device
*dev
)
353 struct lance_private
*lp
= netdev_priv(dev
);
354 volatile struct lance_init_block
*ib
= lp
->init_block
;
355 volatile struct lance_tx_desc
*td
;
360 blinken_leds(0x80, 0);
363 WRITERDP(lp
, LE_C0_TINT
| LE_C0_INEA
);
367 for (i
= j
; i
!= lp
->tx_new
; i
= j
) {
368 td
= &ib
->btx_ring
[i
];
370 /* If we hit a packet not owned by us, stop */
371 if (td
->tmd1_bits
& LE_T1_OWN
)
374 if (td
->tmd1_bits
& LE_T1_ERR
) {
377 dev
->stats
.tx_errors
++;
378 if (status
& LE_T3_RTY
)
379 dev
->stats
.tx_aborted_errors
++;
380 if (status
& LE_T3_LCOL
)
381 dev
->stats
.tx_window_errors
++;
383 if (status
& LE_T3_CLOS
) {
384 dev
->stats
.tx_carrier_errors
++;
385 if (lp
->auto_select
) {
386 lp
->tpe
= 1 - lp
->tpe
;
387 printk("%s: Carrier Lost, trying %s\n",
389 lp
->tpe
? "TPE" : "AUI");
391 WRITERAP(lp
, LE_CSR0
);
392 WRITERDP(lp
, LE_C0_STOP
);
393 lance_init_ring(dev
);
395 init_restart_lance(lp
);
400 /* buffer errors and underflows turn off the transmitter */
401 /* Restart the adapter */
402 if (status
& (LE_T3_BUF
|LE_T3_UFL
)) {
403 dev
->stats
.tx_fifo_errors
++;
405 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
408 WRITERAP(lp
, LE_CSR0
);
409 WRITERDP(lp
, LE_C0_STOP
);
410 lance_init_ring(dev
);
412 init_restart_lance(lp
);
415 } else if ((td
->tmd1_bits
& LE_T1_POK
) == LE_T1_POK
) {
417 * So we don't count the packet more than once.
419 td
->tmd1_bits
&= ~(LE_T1_POK
);
421 /* One collision before packet was sent. */
422 if (td
->tmd1_bits
& LE_T1_EONE
)
423 dev
->stats
.collisions
++;
425 /* More than one collision, be optimistic. */
426 if (td
->tmd1_bits
& LE_T1_EMORE
)
427 dev
->stats
.collisions
+= 2;
429 dev
->stats
.tx_packets
++;
432 j
= (j
+ 1) & lp
->tx_ring_mod_mask
;
435 WRITERDP(lp
, LE_C0_TINT
| LE_C0_INEA
);
440 lance_interrupt(int irq
, void *dev_id
)
442 struct net_device
*dev
= (struct net_device
*)dev_id
;
443 struct lance_private
*lp
= netdev_priv(dev
);
446 spin_lock(&lp
->devlock
);
448 WRITERAP(lp
, LE_CSR0
); /* LANCE Controller Status */
453 if (!(csr0
& LE_C0_INTR
)) { /* Check if any interrupt has */
454 spin_unlock(&lp
->devlock
);
455 return IRQ_NONE
; /* been generated by the Lance. */
458 /* Acknowledge all the interrupt sources ASAP */
459 WRITERDP(lp
, csr0
& ~(LE_C0_INEA
|LE_C0_TDMD
|LE_C0_STOP
|LE_C0_STRT
|LE_C0_INIT
));
461 if ((csr0
& LE_C0_ERR
)) {
462 /* Clear the error condition */
463 WRITERDP(lp
, LE_C0_BABL
|LE_C0_ERR
|LE_C0_MISS
|LE_C0_INEA
);
466 if (csr0
& LE_C0_RINT
)
469 if (csr0
& LE_C0_TINT
)
472 /* Log misc errors. */
473 if (csr0
& LE_C0_BABL
)
474 dev
->stats
.tx_errors
++; /* Tx babble. */
475 if (csr0
& LE_C0_MISS
)
476 dev
->stats
.rx_errors
++; /* Missed a Rx frame. */
477 if (csr0
& LE_C0_MERR
) {
478 printk("%s: Bus master arbitration failure, status %4.4x.\n",
480 /* Restart the chip. */
481 WRITERDP(lp
, LE_C0_STRT
);
484 if (lp
->tx_full
&& netif_queue_stopped(dev
) && (TX_BUFFS_AVAIL
>= 0)) {
486 netif_wake_queue(dev
);
489 WRITERAP(lp
, LE_CSR0
);
490 WRITERDP(lp
, LE_C0_BABL
|LE_C0_CERR
|LE_C0_MISS
|LE_C0_MERR
|LE_C0_IDON
|LE_C0_INEA
);
492 spin_unlock(&lp
->devlock
);
496 int lance_open(struct net_device
*dev
)
498 struct lance_private
*lp
= netdev_priv(dev
);
501 /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
502 if (request_irq(lp
->irq
, lance_interrupt
, IRQF_SHARED
, lp
->name
, dev
))
505 res
= lance_reset(dev
);
506 spin_lock_init(&lp
->devlock
);
507 netif_start_queue(dev
);
511 EXPORT_SYMBOL_GPL(lance_open
);
513 int lance_close(struct net_device
*dev
)
515 struct lance_private
*lp
= netdev_priv(dev
);
517 netif_stop_queue(dev
);
520 WRITERAP(lp
, LE_CSR0
);
521 WRITERDP(lp
, LE_C0_STOP
);
523 free_irq(lp
->irq
, dev
);
527 EXPORT_SYMBOL_GPL(lance_close
);
529 void lance_tx_timeout(struct net_device
*dev
)
531 printk("lance_tx_timeout\n");
533 dev
->trans_start
= jiffies
; /* prevent tx timeout */
534 netif_wake_queue(dev
);
536 EXPORT_SYMBOL_GPL(lance_tx_timeout
);
538 int lance_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
540 struct lance_private
*lp
= netdev_priv(dev
);
541 volatile struct lance_init_block
*ib
= lp
->init_block
;
542 int entry
, skblen
, len
;
547 return NETDEV_TX_LOCKED
;
549 netif_stop_queue(dev
);
554 /* dump the packet */
558 for (i
= 0; i
< 64; i
++) {
561 printk("%2.2x ", skb
->data
[i
]);
565 len
= (skblen
<= ETH_ZLEN
) ? ETH_ZLEN
: skblen
;
566 entry
= lp
->tx_new
& lp
->tx_ring_mod_mask
;
567 ib
->btx_ring
[entry
].length
= (-len
) | 0xf000;
568 ib
->btx_ring
[entry
].misc
= 0;
570 if (skb
->len
< ETH_ZLEN
)
571 memset((void *)&ib
->tx_buf
[entry
][0], 0, ETH_ZLEN
);
572 skb_copy_from_linear_data(skb
, (void *)&ib
->tx_buf
[entry
][0], skblen
);
574 /* Now, give the packet to the lance */
575 ib
->btx_ring
[entry
].tmd1_bits
= (LE_T1_POK
|LE_T1_OWN
);
576 lp
->tx_new
= (lp
->tx_new
+ 1) & lp
->tx_ring_mod_mask
;
579 /* Kick the lance: transmit now */
580 WRITERDP(lp
, LE_C0_INEA
| LE_C0_TDMD
);
583 spin_lock_irqsave(&lp
->devlock
, flags
);
585 netif_start_queue(dev
);
588 spin_unlock_irqrestore(&lp
->devlock
, flags
);
592 EXPORT_SYMBOL_GPL(lance_start_xmit
);
594 /* taken from the depca driver via a2065.c */
595 static void lance_load_multicast(struct net_device
*dev
)
597 struct lance_private
*lp
= netdev_priv(dev
);
598 volatile struct lance_init_block
*ib
= lp
->init_block
;
599 volatile u16
*mcast_table
= (u16
*)&ib
->filter
;
600 struct netdev_hw_addr
*ha
;
603 /* set all multicast bits */
604 if (dev
->flags
& IFF_ALLMULTI
) {
605 ib
->filter
[0] = 0xffffffff;
606 ib
->filter
[1] = 0xffffffff;
609 /* clear the multicast filter */
614 netdev_for_each_mc_addr(ha
, dev
) {
615 crc
= ether_crc_le(6, ha
->addr
);
617 mcast_table
[crc
>> 4] |= 1 << (crc
& 0xf);
622 void lance_set_multicast(struct net_device
*dev
)
624 struct lance_private
*lp
= netdev_priv(dev
);
625 volatile struct lance_init_block
*ib
= lp
->init_block
;
628 stopped
= netif_queue_stopped(dev
);
630 netif_stop_queue(dev
);
632 while (lp
->tx_old
!= lp
->tx_new
)
635 WRITERAP(lp
, LE_CSR0
);
636 WRITERDP(lp
, LE_C0_STOP
);
637 lance_init_ring(dev
);
639 if (dev
->flags
& IFF_PROMISC
) {
640 ib
->mode
|= LE_MO_PROM
;
642 ib
->mode
&= ~LE_MO_PROM
;
643 lance_load_multicast(dev
);
646 init_restart_lance(lp
);
649 netif_start_queue(dev
);
651 EXPORT_SYMBOL_GPL(lance_set_multicast
);
653 #ifdef CONFIG_NET_POLL_CONTROLLER
654 void lance_poll(struct net_device
*dev
)
656 struct lance_private
*lp
= netdev_priv(dev
);
658 spin_lock(&lp
->devlock
);
659 WRITERAP(lp
, LE_CSR0
);
660 WRITERDP(lp
, LE_C0_STRT
);
661 spin_unlock(&lp
->devlock
);
662 lance_interrupt(dev
->irq
, dev
);
666 MODULE_LICENSE("GPL");