2 * Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC.
4 * 2005-2009 (c) Aeroflex Gaisler AB
6 * This driver supports GRETH 10/100 and GRETH 10/100/1G Ethernet MACs
7 * available in the GRLIB VHDL IP core library.
9 * Full documentation of both cores can be found here:
10 * http://www.gaisler.com/products/grlib/grip.pdf
12 * The Gigabit version supports scatter/gather DMA, any alignment of
13 * buffers and checksum offloading.
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
20 * Contributors: Kristoffer Glembo
25 #include <linux/module.h>
26 #include <linux/uaccess.h>
27 #include <linux/init.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/ethtool.h>
31 #include <linux/skbuff.h>
33 #include <linux/crc32.h>
34 #include <linux/mii.h>
35 #include <linux/of_device.h>
36 #include <linux/of_platform.h>
37 #include <asm/cacheflush.h>
38 #include <asm/byteorder.h>
41 #include <asm/idprom.h>
46 #define GRETH_DEF_MSG_ENABLE \
55 static int greth_debug
= -1; /* -1 == use GRETH_DEF_MSG_ENABLE as value */
56 module_param(greth_debug
, int, 0);
57 MODULE_PARM_DESC(greth_debug
, "GRETH bitmapped debugging message enable value");
59 /* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
60 static int macaddr
[6];
61 module_param_array(macaddr
, int, NULL
, 0);
62 MODULE_PARM_DESC(macaddr
, "GRETH Ethernet MAC address");
64 static int greth_edcl
= 1;
65 module_param(greth_edcl
, int, 0);
66 MODULE_PARM_DESC(greth_edcl
, "GRETH EDCL usage indicator. Set to 1 if EDCL is used.");
68 static int greth_open(struct net_device
*dev
);
69 static netdev_tx_t
greth_start_xmit(struct sk_buff
*skb
,
70 struct net_device
*dev
);
71 static netdev_tx_t
greth_start_xmit_gbit(struct sk_buff
*skb
,
72 struct net_device
*dev
);
73 static int greth_rx(struct net_device
*dev
, int limit
);
74 static int greth_rx_gbit(struct net_device
*dev
, int limit
);
75 static void greth_clean_tx(struct net_device
*dev
);
76 static void greth_clean_tx_gbit(struct net_device
*dev
);
77 static irqreturn_t
greth_interrupt(int irq
, void *dev_id
);
78 static int greth_close(struct net_device
*dev
);
79 static int greth_set_mac_add(struct net_device
*dev
, void *p
);
80 static void greth_set_multicast_list(struct net_device
*dev
);
82 #define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a))))
83 #define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a)))
84 #define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v))))
85 #define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v))))
87 #define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK)
88 #define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK)
89 #define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK)
91 static void greth_print_rx_packet(void *addr
, int len
)
93 print_hex_dump(KERN_DEBUG
, "RX: ", DUMP_PREFIX_OFFSET
, 16, 1,
97 static void greth_print_tx_packet(struct sk_buff
*skb
)
102 if (skb_shinfo(skb
)->nr_frags
== 0)
105 length
= skb_headlen(skb
);
107 print_hex_dump(KERN_DEBUG
, "TX: ", DUMP_PREFIX_OFFSET
, 16, 1,
108 skb
->data
, length
, true);
110 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
112 print_hex_dump(KERN_DEBUG
, "TX: ", DUMP_PREFIX_OFFSET
, 16, 1,
113 phys_to_virt(page_to_phys(skb_shinfo(skb
)->frags
[i
].page
)) +
114 skb_shinfo(skb
)->frags
[i
].page_offset
,
119 static inline void greth_enable_tx(struct greth_private
*greth
)
122 GRETH_REGORIN(greth
->regs
->control
, GRETH_TXEN
);
125 static inline void greth_disable_tx(struct greth_private
*greth
)
127 GRETH_REGANDIN(greth
->regs
->control
, ~GRETH_TXEN
);
130 static inline void greth_enable_rx(struct greth_private
*greth
)
133 GRETH_REGORIN(greth
->regs
->control
, GRETH_RXEN
);
136 static inline void greth_disable_rx(struct greth_private
*greth
)
138 GRETH_REGANDIN(greth
->regs
->control
, ~GRETH_RXEN
);
141 static inline void greth_enable_irqs(struct greth_private
*greth
)
143 GRETH_REGORIN(greth
->regs
->control
, GRETH_RXI
| GRETH_TXI
);
146 static inline void greth_disable_irqs(struct greth_private
*greth
)
148 GRETH_REGANDIN(greth
->regs
->control
, ~(GRETH_RXI
|GRETH_TXI
));
151 static inline void greth_write_bd(u32
*bd
, u32 val
)
153 __raw_writel(cpu_to_be32(val
), bd
);
156 static inline u32
greth_read_bd(u32
*bd
)
158 return be32_to_cpu(__raw_readl(bd
));
161 static void greth_clean_rings(struct greth_private
*greth
)
164 struct greth_bd
*rx_bdp
= greth
->rx_bd_base
;
165 struct greth_bd
*tx_bdp
= greth
->tx_bd_base
;
167 if (greth
->gbit_mac
) {
169 /* Free and unmap RX buffers */
170 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++, rx_bdp
++) {
171 if (greth
->rx_skbuff
[i
] != NULL
) {
172 dev_kfree_skb(greth
->rx_skbuff
[i
]);
173 dma_unmap_single(greth
->dev
,
174 greth_read_bd(&rx_bdp
->addr
),
175 MAX_FRAME_SIZE
+NET_IP_ALIGN
,
181 while (greth
->tx_free
< GRETH_TXBD_NUM
) {
183 struct sk_buff
*skb
= greth
->tx_skbuff
[greth
->tx_last
];
184 int nr_frags
= skb_shinfo(skb
)->nr_frags
;
185 tx_bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
186 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
188 dma_unmap_single(greth
->dev
,
189 greth_read_bd(&tx_bdp
->addr
),
193 for (i
= 0; i
< nr_frags
; i
++) {
194 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
195 tx_bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
197 dma_unmap_page(greth
->dev
,
198 greth_read_bd(&tx_bdp
->addr
),
202 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
204 greth
->tx_free
+= nr_frags
+1;
209 } else { /* 10/100 Mbps MAC */
211 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++, rx_bdp
++) {
212 kfree(greth
->rx_bufs
[i
]);
213 dma_unmap_single(greth
->dev
,
214 greth_read_bd(&rx_bdp
->addr
),
218 for (i
= 0; i
< GRETH_TXBD_NUM
; i
++, tx_bdp
++) {
219 kfree(greth
->tx_bufs
[i
]);
220 dma_unmap_single(greth
->dev
,
221 greth_read_bd(&tx_bdp
->addr
),
228 static int greth_init_rings(struct greth_private
*greth
)
231 struct greth_bd
*rx_bd
, *tx_bd
;
235 rx_bd
= greth
->rx_bd_base
;
236 tx_bd
= greth
->tx_bd_base
;
238 /* Initialize descriptor rings and buffers */
239 if (greth
->gbit_mac
) {
241 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++) {
242 skb
= netdev_alloc_skb(greth
->netdev
, MAX_FRAME_SIZE
+NET_IP_ALIGN
);
244 if (netif_msg_ifup(greth
))
245 dev_err(greth
->dev
, "Error allocating DMA ring.\n");
248 skb_reserve(skb
, NET_IP_ALIGN
);
249 dma_addr
= dma_map_single(greth
->dev
,
251 MAX_FRAME_SIZE
+NET_IP_ALIGN
,
254 if (dma_mapping_error(greth
->dev
, dma_addr
)) {
255 if (netif_msg_ifup(greth
))
256 dev_err(greth
->dev
, "Could not create initial DMA mapping\n");
259 greth
->rx_skbuff
[i
] = skb
;
260 greth_write_bd(&rx_bd
[i
].addr
, dma_addr
);
261 greth_write_bd(&rx_bd
[i
].stat
, GRETH_BD_EN
| GRETH_BD_IE
);
266 /* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */
267 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++) {
269 greth
->rx_bufs
[i
] = kmalloc(MAX_FRAME_SIZE
, GFP_KERNEL
);
271 if (greth
->rx_bufs
[i
] == NULL
) {
272 if (netif_msg_ifup(greth
))
273 dev_err(greth
->dev
, "Error allocating DMA ring.\n");
277 dma_addr
= dma_map_single(greth
->dev
,
282 if (dma_mapping_error(greth
->dev
, dma_addr
)) {
283 if (netif_msg_ifup(greth
))
284 dev_err(greth
->dev
, "Could not create initial DMA mapping\n");
287 greth_write_bd(&rx_bd
[i
].addr
, dma_addr
);
288 greth_write_bd(&rx_bd
[i
].stat
, GRETH_BD_EN
| GRETH_BD_IE
);
290 for (i
= 0; i
< GRETH_TXBD_NUM
; i
++) {
292 greth
->tx_bufs
[i
] = kmalloc(MAX_FRAME_SIZE
, GFP_KERNEL
);
294 if (greth
->tx_bufs
[i
] == NULL
) {
295 if (netif_msg_ifup(greth
))
296 dev_err(greth
->dev
, "Error allocating DMA ring.\n");
300 dma_addr
= dma_map_single(greth
->dev
,
305 if (dma_mapping_error(greth
->dev
, dma_addr
)) {
306 if (netif_msg_ifup(greth
))
307 dev_err(greth
->dev
, "Could not create initial DMA mapping\n");
310 greth_write_bd(&tx_bd
[i
].addr
, dma_addr
);
311 greth_write_bd(&tx_bd
[i
].stat
, 0);
314 greth_write_bd(&rx_bd
[GRETH_RXBD_NUM
- 1].stat
,
315 greth_read_bd(&rx_bd
[GRETH_RXBD_NUM
- 1].stat
) | GRETH_BD_WR
);
317 /* Initialize pointers. */
321 greth
->tx_free
= GRETH_TXBD_NUM
;
323 /* Initialize descriptor base address */
324 GRETH_REGSAVE(greth
->regs
->tx_desc_p
, greth
->tx_bd_base_phys
);
325 GRETH_REGSAVE(greth
->regs
->rx_desc_p
, greth
->rx_bd_base_phys
);
330 greth_clean_rings(greth
);
334 static int greth_open(struct net_device
*dev
)
336 struct greth_private
*greth
= netdev_priv(dev
);
339 err
= greth_init_rings(greth
);
341 if (netif_msg_ifup(greth
))
342 dev_err(&dev
->dev
, "Could not allocate memory for DMA rings\n");
346 err
= request_irq(greth
->irq
, greth_interrupt
, 0, "eth", (void *) dev
);
348 if (netif_msg_ifup(greth
))
349 dev_err(&dev
->dev
, "Could not allocate interrupt %d\n", dev
->irq
);
350 greth_clean_rings(greth
);
354 if (netif_msg_ifup(greth
))
355 dev_dbg(&dev
->dev
, " starting queue\n");
356 netif_start_queue(dev
);
358 napi_enable(&greth
->napi
);
360 greth_enable_irqs(greth
);
361 greth_enable_tx(greth
);
362 greth_enable_rx(greth
);
367 static int greth_close(struct net_device
*dev
)
369 struct greth_private
*greth
= netdev_priv(dev
);
371 napi_disable(&greth
->napi
);
373 greth_disable_tx(greth
);
375 netif_stop_queue(dev
);
377 free_irq(greth
->irq
, (void *) dev
);
379 greth_clean_rings(greth
);
385 greth_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
387 struct greth_private
*greth
= netdev_priv(dev
);
388 struct greth_bd
*bdp
;
389 int err
= NETDEV_TX_OK
;
390 u32 status
, dma_addr
;
392 bdp
= greth
->tx_bd_base
+ greth
->tx_next
;
394 if (unlikely(greth
->tx_free
<= 0)) {
395 netif_stop_queue(dev
);
396 return NETDEV_TX_BUSY
;
399 if (netif_msg_pktdata(greth
))
400 greth_print_tx_packet(skb
);
403 if (unlikely(skb
->len
> MAX_FRAME_SIZE
)) {
404 dev
->stats
.tx_errors
++;
408 dma_addr
= greth_read_bd(&bdp
->addr
);
410 memcpy((unsigned char *) phys_to_virt(dma_addr
), skb
->data
, skb
->len
);
412 dma_sync_single_for_device(greth
->dev
, dma_addr
, skb
->len
, DMA_TO_DEVICE
);
414 status
= GRETH_BD_EN
| (skb
->len
& GRETH_BD_LEN
);
416 /* Wrap around descriptor ring */
417 if (greth
->tx_next
== GRETH_TXBD_NUM_MASK
) {
418 status
|= GRETH_BD_WR
;
421 greth
->tx_next
= NEXT_TX(greth
->tx_next
);
424 /* No more descriptors */
425 if (unlikely(greth
->tx_free
== 0)) {
427 /* Free transmitted descriptors */
430 /* If nothing was cleaned, stop queue & wait for irq */
431 if (unlikely(greth
->tx_free
== 0)) {
432 status
|= GRETH_BD_IE
;
433 netif_stop_queue(dev
);
437 /* Write descriptor control word and enable transmission */
438 greth_write_bd(&bdp
->stat
, status
);
439 greth_enable_tx(greth
);
448 greth_start_xmit_gbit(struct sk_buff
*skb
, struct net_device
*dev
)
450 struct greth_private
*greth
= netdev_priv(dev
);
451 struct greth_bd
*bdp
;
452 u32 status
= 0, dma_addr
;
453 int curr_tx
, nr_frags
, i
, err
= NETDEV_TX_OK
;
455 nr_frags
= skb_shinfo(skb
)->nr_frags
;
457 if (greth
->tx_free
< nr_frags
+ 1) {
458 netif_stop_queue(dev
);
459 err
= NETDEV_TX_BUSY
;
463 if (netif_msg_pktdata(greth
))
464 greth_print_tx_packet(skb
);
466 if (unlikely(skb
->len
> MAX_FRAME_SIZE
)) {
467 dev
->stats
.tx_errors
++;
471 /* Save skb pointer. */
472 greth
->tx_skbuff
[greth
->tx_next
] = skb
;
476 status
= GRETH_TXBD_MORE
;
478 status
|= GRETH_TXBD_CSALL
;
479 status
|= skb_headlen(skb
) & GRETH_BD_LEN
;
480 if (greth
->tx_next
== GRETH_TXBD_NUM_MASK
)
481 status
|= GRETH_BD_WR
;
484 bdp
= greth
->tx_bd_base
+ greth
->tx_next
;
485 greth_write_bd(&bdp
->stat
, status
);
486 dma_addr
= dma_map_single(greth
->dev
, skb
->data
, skb_headlen(skb
), DMA_TO_DEVICE
);
488 if (unlikely(dma_mapping_error(greth
->dev
, dma_addr
)))
491 greth_write_bd(&bdp
->addr
, dma_addr
);
493 curr_tx
= NEXT_TX(greth
->tx_next
);
496 for (i
= 0; i
< nr_frags
; i
++) {
497 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
498 greth
->tx_skbuff
[curr_tx
] = NULL
;
499 bdp
= greth
->tx_bd_base
+ curr_tx
;
501 status
= GRETH_TXBD_CSALL
;
502 status
|= frag
->size
& GRETH_BD_LEN
;
504 /* Wrap around descriptor ring */
505 if (curr_tx
== GRETH_TXBD_NUM_MASK
)
506 status
|= GRETH_BD_WR
;
508 /* More fragments left */
509 if (i
< nr_frags
- 1)
510 status
|= GRETH_TXBD_MORE
;
512 /* ... last fragment, check if out of descriptors */
513 else if (greth
->tx_free
- nr_frags
- 1 < (MAX_SKB_FRAGS
+ 1)) {
515 /* Enable interrupts and stop queue */
516 status
|= GRETH_BD_IE
;
517 netif_stop_queue(dev
);
520 greth_write_bd(&bdp
->stat
, status
);
522 dma_addr
= dma_map_page(greth
->dev
,
528 if (unlikely(dma_mapping_error(greth
->dev
, dma_addr
)))
531 greth_write_bd(&bdp
->addr
, dma_addr
);
533 curr_tx
= NEXT_TX(curr_tx
);
538 /* Enable the descriptors that we configured ... */
539 for (i
= 0; i
< nr_frags
+ 1; i
++) {
540 bdp
= greth
->tx_bd_base
+ greth
->tx_next
;
541 greth_write_bd(&bdp
->stat
, greth_read_bd(&bdp
->stat
) | GRETH_BD_EN
);
542 greth
->tx_next
= NEXT_TX(greth
->tx_next
);
546 greth_enable_tx(greth
);
551 /* Unmap SKB mappings that succeeded */
552 for (i
= 0; greth
->tx_next
+ i
!= curr_tx
; i
++) {
553 bdp
= greth
->tx_bd_base
+ greth
->tx_next
+ i
;
554 dma_unmap_single(greth
->dev
,
555 greth_read_bd(&bdp
->addr
),
556 greth_read_bd(&bdp
->stat
) & GRETH_BD_LEN
,
561 dev_warn(greth
->dev
, "Could not create TX DMA mapping\n");
568 static irqreturn_t
greth_interrupt(int irq
, void *dev_id
)
570 struct net_device
*dev
= dev_id
;
571 struct greth_private
*greth
;
573 irqreturn_t retval
= IRQ_NONE
;
575 greth
= netdev_priv(dev
);
577 spin_lock(&greth
->devlock
);
579 /* Get the interrupt events that caused us to be here. */
580 status
= GRETH_REGLOAD(greth
->regs
->status
);
582 /* Handle rx and tx interrupts through poll */
583 if (status
& (GRETH_INT_RX
| GRETH_INT_TX
)) {
585 /* Clear interrupt status */
586 GRETH_REGORIN(greth
->regs
->status
,
587 status
& (GRETH_INT_RX
| GRETH_INT_TX
));
589 retval
= IRQ_HANDLED
;
591 /* Disable interrupts and schedule poll() */
592 greth_disable_irqs(greth
);
593 napi_schedule(&greth
->napi
);
597 spin_unlock(&greth
->devlock
);
602 static void greth_clean_tx(struct net_device
*dev
)
604 struct greth_private
*greth
;
605 struct greth_bd
*bdp
;
608 greth
= netdev_priv(dev
);
611 bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
612 stat
= greth_read_bd(&bdp
->stat
);
614 if (unlikely(stat
& GRETH_BD_EN
))
617 if (greth
->tx_free
== GRETH_TXBD_NUM
)
620 /* Check status for errors */
621 if (unlikely(stat
& GRETH_TXBD_STATUS
)) {
622 dev
->stats
.tx_errors
++;
623 if (stat
& GRETH_TXBD_ERR_AL
)
624 dev
->stats
.tx_aborted_errors
++;
625 if (stat
& GRETH_TXBD_ERR_UE
)
626 dev
->stats
.tx_fifo_errors
++;
628 dev
->stats
.tx_packets
++;
629 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
633 if (greth
->tx_free
> 0) {
634 netif_wake_queue(dev
);
639 static inline void greth_update_tx_stats(struct net_device
*dev
, u32 stat
)
641 /* Check status for errors */
642 if (unlikely(stat
& GRETH_TXBD_STATUS
)) {
643 dev
->stats
.tx_errors
++;
644 if (stat
& GRETH_TXBD_ERR_AL
)
645 dev
->stats
.tx_aborted_errors
++;
646 if (stat
& GRETH_TXBD_ERR_UE
)
647 dev
->stats
.tx_fifo_errors
++;
648 if (stat
& GRETH_TXBD_ERR_LC
)
649 dev
->stats
.tx_aborted_errors
++;
651 dev
->stats
.tx_packets
++;
654 static void greth_clean_tx_gbit(struct net_device
*dev
)
656 struct greth_private
*greth
;
657 struct greth_bd
*bdp
, *bdp_last_frag
;
662 greth
= netdev_priv(dev
);
664 while (greth
->tx_free
< GRETH_TXBD_NUM
) {
666 skb
= greth
->tx_skbuff
[greth
->tx_last
];
668 nr_frags
= skb_shinfo(skb
)->nr_frags
;
670 /* We only clean fully completed SKBs */
671 bdp_last_frag
= greth
->tx_bd_base
+ SKIP_TX(greth
->tx_last
, nr_frags
);
672 stat
= bdp_last_frag
->stat
;
674 if (stat
& GRETH_BD_EN
)
677 greth
->tx_skbuff
[greth
->tx_last
] = NULL
;
679 greth_update_tx_stats(dev
, stat
);
681 bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
683 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
685 dma_unmap_single(greth
->dev
,
686 greth_read_bd(&bdp
->addr
),
690 for (i
= 0; i
< nr_frags
; i
++) {
691 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
692 bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
694 dma_unmap_page(greth
->dev
,
695 greth_read_bd(&bdp
->addr
),
699 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
701 greth
->tx_free
+= nr_frags
+1;
704 if (greth
->tx_free
> (MAX_SKB_FRAGS
+ 1)) {
705 netif_wake_queue(dev
);
709 static int greth_pending_packets(struct greth_private
*greth
)
711 struct greth_bd
*bdp
;
713 bdp
= greth
->rx_bd_base
+ greth
->rx_cur
;
714 status
= greth_read_bd(&bdp
->stat
);
715 if (status
& GRETH_BD_EN
)
721 static int greth_rx(struct net_device
*dev
, int limit
)
723 struct greth_private
*greth
;
724 struct greth_bd
*bdp
;
728 u32 status
, dma_addr
;
730 greth
= netdev_priv(dev
);
732 for (count
= 0; count
< limit
; ++count
) {
734 bdp
= greth
->rx_bd_base
+ greth
->rx_cur
;
735 status
= greth_read_bd(&bdp
->stat
);
736 dma_addr
= greth_read_bd(&bdp
->addr
);
739 if (unlikely(status
& GRETH_BD_EN
)) {
743 /* Check status for errors. */
744 if (unlikely(status
& GRETH_RXBD_STATUS
)) {
745 if (status
& GRETH_RXBD_ERR_FT
) {
746 dev
->stats
.rx_length_errors
++;
749 if (status
& (GRETH_RXBD_ERR_AE
| GRETH_RXBD_ERR_OE
)) {
750 dev
->stats
.rx_frame_errors
++;
753 if (status
& GRETH_RXBD_ERR_CRC
) {
754 dev
->stats
.rx_crc_errors
++;
759 dev
->stats
.rx_errors
++;
763 pkt_len
= status
& GRETH_BD_LEN
;
765 skb
= netdev_alloc_skb(dev
, pkt_len
+ NET_IP_ALIGN
);
767 if (unlikely(skb
== NULL
)) {
770 dev_warn(&dev
->dev
, "low on memory - " "packet dropped\n");
772 dev
->stats
.rx_dropped
++;
775 skb_reserve(skb
, NET_IP_ALIGN
);
778 dma_sync_single_for_cpu(greth
->dev
,
783 if (netif_msg_pktdata(greth
))
784 greth_print_rx_packet(phys_to_virt(dma_addr
), pkt_len
);
786 memcpy(skb_put(skb
, pkt_len
), phys_to_virt(dma_addr
), pkt_len
);
788 skb
->protocol
= eth_type_trans(skb
, dev
);
789 dev
->stats
.rx_packets
++;
790 netif_receive_skb(skb
);
794 status
= GRETH_BD_EN
| GRETH_BD_IE
;
795 if (greth
->rx_cur
== GRETH_RXBD_NUM_MASK
) {
796 status
|= GRETH_BD_WR
;
800 greth_write_bd(&bdp
->stat
, status
);
802 dma_sync_single_for_device(greth
->dev
, dma_addr
, MAX_FRAME_SIZE
, DMA_FROM_DEVICE
);
804 greth_enable_rx(greth
);
806 greth
->rx_cur
= NEXT_RX(greth
->rx_cur
);
812 static inline int hw_checksummed(u32 status
)
815 if (status
& GRETH_RXBD_IP_FRAG
)
818 if (status
& GRETH_RXBD_IP
&& status
& GRETH_RXBD_IP_CSERR
)
821 if (status
& GRETH_RXBD_UDP
&& status
& GRETH_RXBD_UDP_CSERR
)
824 if (status
& GRETH_RXBD_TCP
&& status
& GRETH_RXBD_TCP_CSERR
)
830 static int greth_rx_gbit(struct net_device
*dev
, int limit
)
832 struct greth_private
*greth
;
833 struct greth_bd
*bdp
;
834 struct sk_buff
*skb
, *newskb
;
837 u32 status
, dma_addr
;
839 greth
= netdev_priv(dev
);
841 for (count
= 0; count
< limit
; ++count
) {
843 bdp
= greth
->rx_bd_base
+ greth
->rx_cur
;
844 skb
= greth
->rx_skbuff
[greth
->rx_cur
];
845 status
= greth_read_bd(&bdp
->stat
);
848 if (status
& GRETH_BD_EN
)
851 /* Check status for errors. */
852 if (unlikely(status
& GRETH_RXBD_STATUS
)) {
854 if (status
& GRETH_RXBD_ERR_FT
) {
855 dev
->stats
.rx_length_errors
++;
858 (GRETH_RXBD_ERR_AE
| GRETH_RXBD_ERR_OE
| GRETH_RXBD_ERR_LE
)) {
859 dev
->stats
.rx_frame_errors
++;
861 } else if (status
& GRETH_RXBD_ERR_CRC
) {
862 dev
->stats
.rx_crc_errors
++;
867 /* Allocate new skb to replace current */
868 newskb
= netdev_alloc_skb(dev
, MAX_FRAME_SIZE
+ NET_IP_ALIGN
);
870 if (!bad
&& newskb
) {
871 skb_reserve(newskb
, NET_IP_ALIGN
);
873 dma_addr
= dma_map_single(greth
->dev
,
875 MAX_FRAME_SIZE
+ NET_IP_ALIGN
,
878 if (!dma_mapping_error(greth
->dev
, dma_addr
)) {
879 /* Process the incoming frame. */
880 pkt_len
= status
& GRETH_BD_LEN
;
882 dma_unmap_single(greth
->dev
,
883 greth_read_bd(&bdp
->addr
),
884 MAX_FRAME_SIZE
+ NET_IP_ALIGN
,
887 if (netif_msg_pktdata(greth
))
888 greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp
->addr
)), pkt_len
);
890 skb_put(skb
, pkt_len
);
892 if (greth
->flags
& GRETH_FLAG_RX_CSUM
&& hw_checksummed(status
))
893 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
895 skb
->ip_summed
= CHECKSUM_NONE
;
897 skb
->protocol
= eth_type_trans(skb
, dev
);
898 dev
->stats
.rx_packets
++;
899 netif_receive_skb(skb
);
901 greth
->rx_skbuff
[greth
->rx_cur
] = newskb
;
902 greth_write_bd(&bdp
->addr
, dma_addr
);
905 dev_warn(greth
->dev
, "Could not create DMA mapping, dropping packet\n");
906 dev_kfree_skb(newskb
);
907 dev
->stats
.rx_dropped
++;
911 dev_warn(greth
->dev
, "Could not allocate SKB, dropping packet\n");
912 dev
->stats
.rx_dropped
++;
915 status
= GRETH_BD_EN
| GRETH_BD_IE
;
916 if (greth
->rx_cur
== GRETH_RXBD_NUM_MASK
) {
917 status
|= GRETH_BD_WR
;
921 greth_write_bd(&bdp
->stat
, status
);
922 greth_enable_rx(greth
);
923 greth
->rx_cur
= NEXT_RX(greth
->rx_cur
);
930 static int greth_poll(struct napi_struct
*napi
, int budget
)
932 struct greth_private
*greth
;
934 greth
= container_of(napi
, struct greth_private
, napi
);
936 if (greth
->gbit_mac
) {
937 greth_clean_tx_gbit(greth
->netdev
);
939 greth_clean_tx(greth
->netdev
);
943 if (greth
->gbit_mac
) {
944 work_done
+= greth_rx_gbit(greth
->netdev
, budget
- work_done
);
946 work_done
+= greth_rx(greth
->netdev
, budget
- work_done
);
949 if (work_done
< budget
) {
953 if (greth_pending_packets(greth
)) {
954 napi_reschedule(napi
);
959 greth_enable_irqs(greth
);
963 static int greth_set_mac_add(struct net_device
*dev
, void *p
)
965 struct sockaddr
*addr
= p
;
966 struct greth_private
*greth
;
967 struct greth_regs
*regs
;
969 greth
= netdev_priv(dev
);
970 regs
= (struct greth_regs
*) greth
->regs
;
972 if (!is_valid_ether_addr(addr
->sa_data
))
975 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
977 GRETH_REGSAVE(regs
->esa_msb
, addr
->sa_data
[0] << 8 | addr
->sa_data
[1]);
978 GRETH_REGSAVE(regs
->esa_lsb
,
979 addr
->sa_data
[2] << 24 | addr
->
980 sa_data
[3] << 16 | addr
->sa_data
[4] << 8 | addr
->sa_data
[5]);
984 static u32
greth_hash_get_index(__u8
*addr
)
986 return (ether_crc(6, addr
)) & 0x3F;
989 static void greth_set_hash_filter(struct net_device
*dev
)
991 struct dev_mc_list
*curr
;
992 struct greth_private
*greth
= netdev_priv(dev
);
993 struct greth_regs
*regs
= (struct greth_regs
*) greth
->regs
;
997 mc_filter
[0] = mc_filter
[1] = 0;
999 netdev_for_each_mc_addr(curr
, dev
) {
1000 bitnr
= greth_hash_get_index(curr
->dmi_addr
);
1001 mc_filter
[bitnr
>> 5] |= 1 << (bitnr
& 31);
1004 GRETH_REGSAVE(regs
->hash_msb
, mc_filter
[1]);
1005 GRETH_REGSAVE(regs
->hash_lsb
, mc_filter
[0]);
1008 static void greth_set_multicast_list(struct net_device
*dev
)
1011 struct greth_private
*greth
= netdev_priv(dev
);
1012 struct greth_regs
*regs
= (struct greth_regs
*) greth
->regs
;
1014 cfg
= GRETH_REGLOAD(regs
->control
);
1015 if (dev
->flags
& IFF_PROMISC
)
1016 cfg
|= GRETH_CTRL_PR
;
1018 cfg
&= ~GRETH_CTRL_PR
;
1020 if (greth
->multicast
) {
1021 if (dev
->flags
& IFF_ALLMULTI
) {
1022 GRETH_REGSAVE(regs
->hash_msb
, -1);
1023 GRETH_REGSAVE(regs
->hash_lsb
, -1);
1024 cfg
|= GRETH_CTRL_MCEN
;
1025 GRETH_REGSAVE(regs
->control
, cfg
);
1029 if (netdev_mc_empty(dev
)) {
1030 cfg
&= ~GRETH_CTRL_MCEN
;
1031 GRETH_REGSAVE(regs
->control
, cfg
);
1035 /* Setup multicast filter */
1036 greth_set_hash_filter(dev
);
1037 cfg
|= GRETH_CTRL_MCEN
;
1039 GRETH_REGSAVE(regs
->control
, cfg
);
1042 static u32
greth_get_msglevel(struct net_device
*dev
)
1044 struct greth_private
*greth
= netdev_priv(dev
);
1045 return greth
->msg_enable
;
1048 static void greth_set_msglevel(struct net_device
*dev
, u32 value
)
1050 struct greth_private
*greth
= netdev_priv(dev
);
1051 greth
->msg_enable
= value
;
1053 static int greth_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1055 struct greth_private
*greth
= netdev_priv(dev
);
1056 struct phy_device
*phy
= greth
->phy
;
1061 return phy_ethtool_gset(phy
, cmd
);
1064 static int greth_set_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1066 struct greth_private
*greth
= netdev_priv(dev
);
1067 struct phy_device
*phy
= greth
->phy
;
1072 return phy_ethtool_sset(phy
, cmd
);
1075 static int greth_get_regs_len(struct net_device
*dev
)
1077 return sizeof(struct greth_regs
);
1080 static void greth_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1082 struct greth_private
*greth
= netdev_priv(dev
);
1084 strncpy(info
->driver
, dev_driver_string(greth
->dev
), 32);
1085 strncpy(info
->version
, "revision: 1.0", 32);
1086 strncpy(info
->bus_info
, greth
->dev
->bus
->name
, 32);
1087 strncpy(info
->fw_version
, "N/A", 32);
1088 info
->eedump_len
= 0;
1089 info
->regdump_len
= sizeof(struct greth_regs
);
1092 static void greth_get_regs(struct net_device
*dev
, struct ethtool_regs
*regs
, void *p
)
1095 struct greth_private
*greth
= netdev_priv(dev
);
1096 u32 __iomem
*greth_regs
= (u32 __iomem
*) greth
->regs
;
1099 for (i
= 0; i
< sizeof(struct greth_regs
) / sizeof(u32
); i
++)
1100 buff
[i
] = greth_read_bd(&greth_regs
[i
]);
1103 static u32
greth_get_rx_csum(struct net_device
*dev
)
1105 struct greth_private
*greth
= netdev_priv(dev
);
1106 return (greth
->flags
& GRETH_FLAG_RX_CSUM
) != 0;
1109 static int greth_set_rx_csum(struct net_device
*dev
, u32 data
)
1111 struct greth_private
*greth
= netdev_priv(dev
);
1113 spin_lock_bh(&greth
->devlock
);
1116 greth
->flags
|= GRETH_FLAG_RX_CSUM
;
1118 greth
->flags
&= ~GRETH_FLAG_RX_CSUM
;
1120 spin_unlock_bh(&greth
->devlock
);
1125 static u32
greth_get_tx_csum(struct net_device
*dev
)
1127 return (dev
->features
& NETIF_F_IP_CSUM
) != 0;
1130 static int greth_set_tx_csum(struct net_device
*dev
, u32 data
)
1132 netif_tx_lock_bh(dev
);
1133 ethtool_op_set_tx_csum(dev
, data
);
1134 netif_tx_unlock_bh(dev
);
1138 static const struct ethtool_ops greth_ethtool_ops
= {
1139 .get_msglevel
= greth_get_msglevel
,
1140 .set_msglevel
= greth_set_msglevel
,
1141 .get_settings
= greth_get_settings
,
1142 .set_settings
= greth_set_settings
,
1143 .get_drvinfo
= greth_get_drvinfo
,
1144 .get_regs_len
= greth_get_regs_len
,
1145 .get_regs
= greth_get_regs
,
1146 .get_rx_csum
= greth_get_rx_csum
,
1147 .set_rx_csum
= greth_set_rx_csum
,
1148 .get_tx_csum
= greth_get_tx_csum
,
1149 .set_tx_csum
= greth_set_tx_csum
,
1150 .get_link
= ethtool_op_get_link
,
1153 static struct net_device_ops greth_netdev_ops
= {
1154 .ndo_open
= greth_open
,
1155 .ndo_stop
= greth_close
,
1156 .ndo_start_xmit
= greth_start_xmit
,
1157 .ndo_set_mac_address
= greth_set_mac_add
,
1158 .ndo_validate_addr
= eth_validate_addr
,
1161 static inline int wait_for_mdio(struct greth_private
*greth
)
1163 unsigned long timeout
= jiffies
+ 4*HZ
/100;
1164 while (GRETH_REGLOAD(greth
->regs
->mdio
) & GRETH_MII_BUSY
) {
1165 if (time_after(jiffies
, timeout
))
1171 static int greth_mdio_read(struct mii_bus
*bus
, int phy
, int reg
)
1173 struct greth_private
*greth
= bus
->priv
;
1176 if (!wait_for_mdio(greth
))
1179 GRETH_REGSAVE(greth
->regs
->mdio
, ((phy
& 0x1F) << 11) | ((reg
& 0x1F) << 6) | 2);
1181 if (!wait_for_mdio(greth
))
1184 if (!(GRETH_REGLOAD(greth
->regs
->mdio
) & GRETH_MII_NVALID
)) {
1185 data
= (GRETH_REGLOAD(greth
->regs
->mdio
) >> 16) & 0xFFFF;
1193 static int greth_mdio_write(struct mii_bus
*bus
, int phy
, int reg
, u16 val
)
1195 struct greth_private
*greth
= bus
->priv
;
1197 if (!wait_for_mdio(greth
))
1200 GRETH_REGSAVE(greth
->regs
->mdio
,
1201 ((val
& 0xFFFF) << 16) | ((phy
& 0x1F) << 11) | ((reg
& 0x1F) << 6) | 1);
1203 if (!wait_for_mdio(greth
))
1209 static int greth_mdio_reset(struct mii_bus
*bus
)
1214 static void greth_link_change(struct net_device
*dev
)
1216 struct greth_private
*greth
= netdev_priv(dev
);
1217 struct phy_device
*phydev
= greth
->phy
;
1218 unsigned long flags
;
1220 int status_change
= 0;
1222 spin_lock_irqsave(&greth
->devlock
, flags
);
1226 if ((greth
->speed
!= phydev
->speed
) || (greth
->duplex
!= phydev
->duplex
)) {
1228 GRETH_REGANDIN(greth
->regs
->control
,
1229 ~(GRETH_CTRL_FD
| GRETH_CTRL_SP
| GRETH_CTRL_GB
));
1232 GRETH_REGORIN(greth
->regs
->control
, GRETH_CTRL_FD
);
1234 if (phydev
->speed
== SPEED_100
) {
1236 GRETH_REGORIN(greth
->regs
->control
, GRETH_CTRL_SP
);
1239 else if (phydev
->speed
== SPEED_1000
)
1240 GRETH_REGORIN(greth
->regs
->control
, GRETH_CTRL_GB
);
1242 greth
->speed
= phydev
->speed
;
1243 greth
->duplex
= phydev
->duplex
;
1248 if (phydev
->link
!= greth
->link
) {
1249 if (!phydev
->link
) {
1253 greth
->link
= phydev
->link
;
1258 spin_unlock_irqrestore(&greth
->devlock
, flags
);
1260 if (status_change
) {
1262 pr_debug("%s: link up (%d/%s)\n",
1263 dev
->name
, phydev
->speed
,
1264 DUPLEX_FULL
== phydev
->duplex
? "Full" : "Half");
1266 pr_debug("%s: link down\n", dev
->name
);
1270 static int greth_mdio_probe(struct net_device
*dev
)
1272 struct greth_private
*greth
= netdev_priv(dev
);
1273 struct phy_device
*phy
= NULL
;
1276 /* Find the first PHY */
1277 phy
= phy_find_first(greth
->mdio
);
1280 if (netif_msg_probe(greth
))
1281 dev_err(&dev
->dev
, "no PHY found\n");
1285 ret
= phy_connect_direct(dev
, phy
, &greth_link_change
,
1286 0, greth
->gbit_mac
?
1287 PHY_INTERFACE_MODE_GMII
:
1288 PHY_INTERFACE_MODE_MII
);
1290 if (netif_msg_ifup(greth
))
1291 dev_err(&dev
->dev
, "could not attach to PHY\n");
1295 if (greth
->gbit_mac
)
1296 phy
->supported
&= PHY_GBIT_FEATURES
;
1298 phy
->supported
&= PHY_BASIC_FEATURES
;
1300 phy
->advertising
= phy
->supported
;
1310 static inline int phy_aneg_done(struct phy_device
*phydev
)
1314 retval
= phy_read(phydev
, MII_BMSR
);
1316 return (retval
< 0) ? retval
: (retval
& BMSR_ANEGCOMPLETE
);
1319 static int greth_mdio_init(struct greth_private
*greth
)
1322 unsigned long timeout
;
1324 greth
->mdio
= mdiobus_alloc();
1329 greth
->mdio
->name
= "greth-mdio";
1330 snprintf(greth
->mdio
->id
, MII_BUS_ID_SIZE
, "%s-%d", greth
->mdio
->name
, greth
->irq
);
1331 greth
->mdio
->read
= greth_mdio_read
;
1332 greth
->mdio
->write
= greth_mdio_write
;
1333 greth
->mdio
->reset
= greth_mdio_reset
;
1334 greth
->mdio
->priv
= greth
;
1336 greth
->mdio
->irq
= greth
->mdio_irqs
;
1338 for (phy
= 0; phy
< PHY_MAX_ADDR
; phy
++)
1339 greth
->mdio
->irq
[phy
] = PHY_POLL
;
1341 ret
= mdiobus_register(greth
->mdio
);
1346 ret
= greth_mdio_probe(greth
->netdev
);
1348 if (netif_msg_probe(greth
))
1349 dev_err(&greth
->netdev
->dev
, "failed to probe MDIO bus\n");
1353 phy_start(greth
->phy
);
1355 /* If Ethernet debug link is used make autoneg happen right away */
1356 if (greth
->edcl
&& greth_edcl
== 1) {
1357 phy_start_aneg(greth
->phy
);
1358 timeout
= jiffies
+ 6*HZ
;
1359 while (!phy_aneg_done(greth
->phy
) && time_before(jiffies
, timeout
)) {
1361 genphy_read_status(greth
->phy
);
1362 greth_link_change(greth
->netdev
);
1368 mdiobus_unregister(greth
->mdio
);
1370 mdiobus_free(greth
->mdio
);
1374 /* Initialize the GRETH MAC */
1375 static int __devinit
greth_of_probe(struct of_device
*ofdev
, const struct of_device_id
*match
)
1377 struct net_device
*dev
;
1378 struct greth_private
*greth
;
1379 struct greth_regs
*regs
;
1384 unsigned long timeout
;
1386 dev
= alloc_etherdev(sizeof(struct greth_private
));
1391 greth
= netdev_priv(dev
);
1392 greth
->netdev
= dev
;
1393 greth
->dev
= &ofdev
->dev
;
1395 if (greth_debug
> 0)
1396 greth
->msg_enable
= greth_debug
;
1398 greth
->msg_enable
= GRETH_DEF_MSG_ENABLE
;
1400 spin_lock_init(&greth
->devlock
);
1402 greth
->regs
= of_ioremap(&ofdev
->resource
[0], 0,
1403 resource_size(&ofdev
->resource
[0]),
1404 "grlib-greth regs");
1406 if (greth
->regs
== NULL
) {
1407 if (netif_msg_probe(greth
))
1408 dev_err(greth
->dev
, "ioremap failure.\n");
1413 regs
= (struct greth_regs
*) greth
->regs
;
1414 greth
->irq
= ofdev
->irqs
[0];
1416 dev_set_drvdata(greth
->dev
, dev
);
1417 SET_NETDEV_DEV(dev
, greth
->dev
);
1419 if (netif_msg_probe(greth
))
1420 dev_dbg(greth
->dev
, "reseting controller.\n");
1422 /* Reset the controller. */
1423 GRETH_REGSAVE(regs
->control
, GRETH_RESET
);
1425 /* Wait for MAC to reset itself */
1426 timeout
= jiffies
+ HZ
/100;
1427 while (GRETH_REGLOAD(regs
->control
) & GRETH_RESET
) {
1428 if (time_after(jiffies
, timeout
)) {
1430 if (netif_msg_probe(greth
))
1431 dev_err(greth
->dev
, "timeout when waiting for reset.\n");
1436 /* Get default PHY address */
1437 greth
->phyaddr
= (GRETH_REGLOAD(regs
->mdio
) >> 11) & 0x1F;
1439 /* Check if we have GBIT capable MAC */
1440 tmp
= GRETH_REGLOAD(regs
->control
);
1441 greth
->gbit_mac
= (tmp
>> 27) & 1;
1443 /* Check for multicast capability */
1444 greth
->multicast
= (tmp
>> 25) & 1;
1446 greth
->edcl
= (tmp
>> 31) & 1;
1448 /* If we have EDCL we disable the EDCL speed-duplex FSM so
1449 * it doesn't interfere with the software */
1450 if (greth
->edcl
!= 0)
1451 GRETH_REGORIN(regs
->control
, GRETH_CTRL_DISDUPLEX
);
1453 /* Check if MAC can handle MDIO interrupts */
1454 greth
->mdio_int_en
= (tmp
>> 26) & 1;
1456 err
= greth_mdio_init(greth
);
1458 if (netif_msg_probe(greth
))
1459 dev_err(greth
->dev
, "failed to register MDIO bus\n");
1463 /* Allocate TX descriptor ring in coherent memory */
1464 greth
->tx_bd_base
= (struct greth_bd
*) dma_alloc_coherent(greth
->dev
,
1466 &greth
->tx_bd_base_phys
,
1469 if (!greth
->tx_bd_base
) {
1470 if (netif_msg_probe(greth
))
1471 dev_err(&dev
->dev
, "could not allocate descriptor memory.\n");
1476 memset(greth
->tx_bd_base
, 0, 1024);
1478 /* Allocate RX descriptor ring in coherent memory */
1479 greth
->rx_bd_base
= (struct greth_bd
*) dma_alloc_coherent(greth
->dev
,
1481 &greth
->rx_bd_base_phys
,
1484 if (!greth
->rx_bd_base
) {
1485 if (netif_msg_probe(greth
))
1486 dev_err(greth
->dev
, "could not allocate descriptor memory.\n");
1491 memset(greth
->rx_bd_base
, 0, 1024);
1493 /* Get MAC address from: module param, OF property or ID prom */
1494 for (i
= 0; i
< 6; i
++) {
1495 if (macaddr
[i
] != 0)
1499 const unsigned char *addr
;
1501 addr
= of_get_property(ofdev
->node
, "local-mac-address", &len
);
1502 if (addr
!= NULL
&& len
== 6) {
1503 for (i
= 0; i
< 6; i
++)
1504 macaddr
[i
] = (unsigned int) addr
[i
];
1507 for (i
= 0; i
< 6; i
++)
1508 macaddr
[i
] = (unsigned int) idprom
->id_ethaddr
[i
];
1513 for (i
= 0; i
< 6; i
++)
1514 dev
->dev_addr
[i
] = macaddr
[i
];
1518 if (!is_valid_ether_addr(&dev
->dev_addr
[0])) {
1519 if (netif_msg_probe(greth
))
1520 dev_err(greth
->dev
, "no valid ethernet address, aborting.\n");
1525 GRETH_REGSAVE(regs
->esa_msb
, dev
->dev_addr
[0] << 8 | dev
->dev_addr
[1]);
1526 GRETH_REGSAVE(regs
->esa_lsb
, dev
->dev_addr
[2] << 24 | dev
->dev_addr
[3] << 16 |
1527 dev
->dev_addr
[4] << 8 | dev
->dev_addr
[5]);
1529 /* Clear all pending interrupts except PHY irq */
1530 GRETH_REGSAVE(regs
->status
, 0xFF);
1532 if (greth
->gbit_mac
) {
1533 dev
->features
= NETIF_F_SG
| NETIF_F_IP_CSUM
| NETIF_F_HIGHDMA
;
1534 greth_netdev_ops
.ndo_start_xmit
= greth_start_xmit_gbit
;
1535 greth
->flags
= GRETH_FLAG_RX_CSUM
;
1538 if (greth
->multicast
) {
1539 greth_netdev_ops
.ndo_set_multicast_list
= greth_set_multicast_list
;
1540 dev
->flags
|= IFF_MULTICAST
;
1542 dev
->flags
&= ~IFF_MULTICAST
;
1545 dev
->netdev_ops
= &greth_netdev_ops
;
1546 dev
->ethtool_ops
= &greth_ethtool_ops
;
1548 if (register_netdev(dev
)) {
1549 if (netif_msg_probe(greth
))
1550 dev_err(greth
->dev
, "netdevice registration failed.\n");
1556 memset(&greth
->napi
, 0, sizeof(greth
->napi
));
1557 netif_napi_add(dev
, &greth
->napi
, greth_poll
, 64);
1562 dma_free_coherent(greth
->dev
, 1024, greth
->rx_bd_base
, greth
->rx_bd_base_phys
);
1564 dma_free_coherent(greth
->dev
, 1024, greth
->tx_bd_base
, greth
->tx_bd_base_phys
);
1566 mdiobus_unregister(greth
->mdio
);
1568 of_iounmap(&ofdev
->resource
[0], greth
->regs
, resource_size(&ofdev
->resource
[0]));
1574 static int __devexit
greth_of_remove(struct of_device
*of_dev
)
1576 struct net_device
*ndev
= dev_get_drvdata(&of_dev
->dev
);
1577 struct greth_private
*greth
= netdev_priv(ndev
);
1579 /* Free descriptor areas */
1580 dma_free_coherent(&of_dev
->dev
, 1024, greth
->rx_bd_base
, greth
->rx_bd_base_phys
);
1582 dma_free_coherent(&of_dev
->dev
, 1024, greth
->tx_bd_base
, greth
->tx_bd_base_phys
);
1584 dev_set_drvdata(&of_dev
->dev
, NULL
);
1587 phy_stop(greth
->phy
);
1588 mdiobus_unregister(greth
->mdio
);
1590 unregister_netdev(ndev
);
1593 of_iounmap(&of_dev
->resource
[0], greth
->regs
, resource_size(&of_dev
->resource
[0]));
1598 static struct of_device_id greth_of_match
[] = {
1600 .name
= "GAISLER_ETHMAC",
1605 MODULE_DEVICE_TABLE(of
, greth_of_match
);
1607 static struct of_platform_driver greth_of_driver
= {
1608 .name
= "grlib-greth",
1609 .match_table
= greth_of_match
,
1610 .probe
= greth_of_probe
,
1611 .remove
= __devexit_p(greth_of_remove
),
1613 .owner
= THIS_MODULE
,
1614 .name
= "grlib-greth",
1618 static int __init
greth_init(void)
1620 return of_register_platform_driver(&greth_of_driver
);
1623 static void __exit
greth_cleanup(void)
1625 of_unregister_platform_driver(&greth_of_driver
);
1628 module_init(greth_init
);
1629 module_exit(greth_cleanup
);
1631 MODULE_AUTHOR("Aeroflex Gaisler AB.");
1632 MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver");
1633 MODULE_LICENSE("GPL");