2 * Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC.
4 * 2005-2010 (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/dma-mapping.h>
26 #include <linux/module.h>
27 #include <linux/uaccess.h>
28 #include <linux/interrupt.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
31 #include <linux/ethtool.h>
32 #include <linux/skbuff.h>
34 #include <linux/crc32.h>
35 #include <linux/mii.h>
36 #include <linux/of_device.h>
37 #include <linux/of_net.h>
38 #include <linux/of_platform.h>
39 #include <linux/slab.h>
40 #include <asm/cacheflush.h>
41 #include <asm/byteorder.h>
44 #include <asm/idprom.h>
49 #define GRETH_DEF_MSG_ENABLE \
58 static int greth_debug
= -1; /* -1 == use GRETH_DEF_MSG_ENABLE as value */
59 module_param(greth_debug
, int, 0);
60 MODULE_PARM_DESC(greth_debug
, "GRETH bitmapped debugging message enable value");
62 /* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
63 static int macaddr
[6];
64 module_param_array(macaddr
, int, NULL
, 0);
65 MODULE_PARM_DESC(macaddr
, "GRETH Ethernet MAC address");
67 static int greth_edcl
= 1;
68 module_param(greth_edcl
, int, 0);
69 MODULE_PARM_DESC(greth_edcl
, "GRETH EDCL usage indicator. Set to 1 if EDCL is used.");
71 static int greth_open(struct net_device
*dev
);
72 static netdev_tx_t
greth_start_xmit(struct sk_buff
*skb
,
73 struct net_device
*dev
);
74 static netdev_tx_t
greth_start_xmit_gbit(struct sk_buff
*skb
,
75 struct net_device
*dev
);
76 static int greth_rx(struct net_device
*dev
, int limit
);
77 static int greth_rx_gbit(struct net_device
*dev
, int limit
);
78 static void greth_clean_tx(struct net_device
*dev
);
79 static void greth_clean_tx_gbit(struct net_device
*dev
);
80 static irqreturn_t
greth_interrupt(int irq
, void *dev_id
);
81 static int greth_close(struct net_device
*dev
);
82 static int greth_set_mac_add(struct net_device
*dev
, void *p
);
83 static void greth_set_multicast_list(struct net_device
*dev
);
85 #define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a))))
86 #define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a)))
87 #define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v))))
88 #define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v))))
90 #define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK)
91 #define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK)
92 #define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK)
94 static void greth_print_rx_packet(void *addr
, int len
)
96 print_hex_dump(KERN_DEBUG
, "RX: ", DUMP_PREFIX_OFFSET
, 16, 1,
100 static void greth_print_tx_packet(struct sk_buff
*skb
)
105 if (skb_shinfo(skb
)->nr_frags
== 0)
108 length
= skb_headlen(skb
);
110 print_hex_dump(KERN_DEBUG
, "TX: ", DUMP_PREFIX_OFFSET
, 16, 1,
111 skb
->data
, length
, true);
113 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
115 print_hex_dump(KERN_DEBUG
, "TX: ", DUMP_PREFIX_OFFSET
, 16, 1,
116 skb_frag_address(&skb_shinfo(skb
)->frags
[i
]),
117 skb_shinfo(skb
)->frags
[i
].size
, true);
121 static inline void greth_enable_tx(struct greth_private
*greth
)
124 GRETH_REGORIN(greth
->regs
->control
, GRETH_TXEN
);
127 static inline void greth_enable_tx_and_irq(struct greth_private
*greth
)
129 wmb(); /* BDs must been written to memory before enabling TX */
130 GRETH_REGORIN(greth
->regs
->control
, GRETH_TXEN
| GRETH_TXI
);
133 static inline void greth_disable_tx(struct greth_private
*greth
)
135 GRETH_REGANDIN(greth
->regs
->control
, ~GRETH_TXEN
);
138 static inline void greth_enable_rx(struct greth_private
*greth
)
141 GRETH_REGORIN(greth
->regs
->control
, GRETH_RXEN
);
144 static inline void greth_disable_rx(struct greth_private
*greth
)
146 GRETH_REGANDIN(greth
->regs
->control
, ~GRETH_RXEN
);
149 static inline void greth_enable_irqs(struct greth_private
*greth
)
151 GRETH_REGORIN(greth
->regs
->control
, GRETH_RXI
| GRETH_TXI
);
154 static inline void greth_disable_irqs(struct greth_private
*greth
)
156 GRETH_REGANDIN(greth
->regs
->control
, ~(GRETH_RXI
|GRETH_TXI
));
159 static inline void greth_write_bd(u32
*bd
, u32 val
)
161 __raw_writel(cpu_to_be32(val
), bd
);
164 static inline u32
greth_read_bd(u32
*bd
)
166 return be32_to_cpu(__raw_readl(bd
));
169 static void greth_clean_rings(struct greth_private
*greth
)
172 struct greth_bd
*rx_bdp
= greth
->rx_bd_base
;
173 struct greth_bd
*tx_bdp
= greth
->tx_bd_base
;
175 if (greth
->gbit_mac
) {
177 /* Free and unmap RX buffers */
178 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++, rx_bdp
++) {
179 if (greth
->rx_skbuff
[i
] != NULL
) {
180 dev_kfree_skb(greth
->rx_skbuff
[i
]);
181 dma_unmap_single(greth
->dev
,
182 greth_read_bd(&rx_bdp
->addr
),
183 MAX_FRAME_SIZE
+NET_IP_ALIGN
,
189 while (greth
->tx_free
< GRETH_TXBD_NUM
) {
191 struct sk_buff
*skb
= greth
->tx_skbuff
[greth
->tx_last
];
192 int nr_frags
= skb_shinfo(skb
)->nr_frags
;
193 tx_bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
194 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
196 dma_unmap_single(greth
->dev
,
197 greth_read_bd(&tx_bdp
->addr
),
201 for (i
= 0; i
< nr_frags
; i
++) {
202 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
203 tx_bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
205 dma_unmap_page(greth
->dev
,
206 greth_read_bd(&tx_bdp
->addr
),
210 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
212 greth
->tx_free
+= nr_frags
+1;
217 } else { /* 10/100 Mbps MAC */
219 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++, rx_bdp
++) {
220 kfree(greth
->rx_bufs
[i
]);
221 dma_unmap_single(greth
->dev
,
222 greth_read_bd(&rx_bdp
->addr
),
226 for (i
= 0; i
< GRETH_TXBD_NUM
; i
++, tx_bdp
++) {
227 kfree(greth
->tx_bufs
[i
]);
228 dma_unmap_single(greth
->dev
,
229 greth_read_bd(&tx_bdp
->addr
),
236 static int greth_init_rings(struct greth_private
*greth
)
239 struct greth_bd
*rx_bd
, *tx_bd
;
243 rx_bd
= greth
->rx_bd_base
;
244 tx_bd
= greth
->tx_bd_base
;
246 /* Initialize descriptor rings and buffers */
247 if (greth
->gbit_mac
) {
249 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++) {
250 skb
= netdev_alloc_skb(greth
->netdev
, MAX_FRAME_SIZE
+NET_IP_ALIGN
);
252 if (netif_msg_ifup(greth
))
253 dev_err(greth
->dev
, "Error allocating DMA ring.\n");
256 skb_reserve(skb
, NET_IP_ALIGN
);
257 dma_addr
= dma_map_single(greth
->dev
,
259 MAX_FRAME_SIZE
+NET_IP_ALIGN
,
262 if (dma_mapping_error(greth
->dev
, dma_addr
)) {
263 if (netif_msg_ifup(greth
))
264 dev_err(greth
->dev
, "Could not create initial DMA mapping\n");
267 greth
->rx_skbuff
[i
] = skb
;
268 greth_write_bd(&rx_bd
[i
].addr
, dma_addr
);
269 greth_write_bd(&rx_bd
[i
].stat
, GRETH_BD_EN
| GRETH_BD_IE
);
274 /* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */
275 for (i
= 0; i
< GRETH_RXBD_NUM
; i
++) {
277 greth
->rx_bufs
[i
] = kmalloc(MAX_FRAME_SIZE
, GFP_KERNEL
);
279 if (greth
->rx_bufs
[i
] == NULL
) {
280 if (netif_msg_ifup(greth
))
281 dev_err(greth
->dev
, "Error allocating DMA ring.\n");
285 dma_addr
= dma_map_single(greth
->dev
,
290 if (dma_mapping_error(greth
->dev
, dma_addr
)) {
291 if (netif_msg_ifup(greth
))
292 dev_err(greth
->dev
, "Could not create initial DMA mapping\n");
295 greth_write_bd(&rx_bd
[i
].addr
, dma_addr
);
296 greth_write_bd(&rx_bd
[i
].stat
, GRETH_BD_EN
| GRETH_BD_IE
);
298 for (i
= 0; i
< GRETH_TXBD_NUM
; i
++) {
300 greth
->tx_bufs
[i
] = kmalloc(MAX_FRAME_SIZE
, GFP_KERNEL
);
302 if (greth
->tx_bufs
[i
] == NULL
) {
303 if (netif_msg_ifup(greth
))
304 dev_err(greth
->dev
, "Error allocating DMA ring.\n");
308 dma_addr
= dma_map_single(greth
->dev
,
313 if (dma_mapping_error(greth
->dev
, dma_addr
)) {
314 if (netif_msg_ifup(greth
))
315 dev_err(greth
->dev
, "Could not create initial DMA mapping\n");
318 greth_write_bd(&tx_bd
[i
].addr
, dma_addr
);
319 greth_write_bd(&tx_bd
[i
].stat
, 0);
322 greth_write_bd(&rx_bd
[GRETH_RXBD_NUM
- 1].stat
,
323 greth_read_bd(&rx_bd
[GRETH_RXBD_NUM
- 1].stat
) | GRETH_BD_WR
);
325 /* Initialize pointers. */
329 greth
->tx_free
= GRETH_TXBD_NUM
;
331 /* Initialize descriptor base address */
332 GRETH_REGSAVE(greth
->regs
->tx_desc_p
, greth
->tx_bd_base_phys
);
333 GRETH_REGSAVE(greth
->regs
->rx_desc_p
, greth
->rx_bd_base_phys
);
338 greth_clean_rings(greth
);
342 static int greth_open(struct net_device
*dev
)
344 struct greth_private
*greth
= netdev_priv(dev
);
347 err
= greth_init_rings(greth
);
349 if (netif_msg_ifup(greth
))
350 dev_err(&dev
->dev
, "Could not allocate memory for DMA rings\n");
354 err
= request_irq(greth
->irq
, greth_interrupt
, 0, "eth", (void *) dev
);
356 if (netif_msg_ifup(greth
))
357 dev_err(&dev
->dev
, "Could not allocate interrupt %d\n", dev
->irq
);
358 greth_clean_rings(greth
);
362 if (netif_msg_ifup(greth
))
363 dev_dbg(&dev
->dev
, " starting queue\n");
364 netif_start_queue(dev
);
366 GRETH_REGSAVE(greth
->regs
->status
, 0xFF);
368 napi_enable(&greth
->napi
);
370 greth_enable_irqs(greth
);
371 greth_enable_tx(greth
);
372 greth_enable_rx(greth
);
377 static int greth_close(struct net_device
*dev
)
379 struct greth_private
*greth
= netdev_priv(dev
);
381 napi_disable(&greth
->napi
);
383 greth_disable_irqs(greth
);
384 greth_disable_tx(greth
);
385 greth_disable_rx(greth
);
387 netif_stop_queue(dev
);
389 free_irq(greth
->irq
, (void *) dev
);
391 greth_clean_rings(greth
);
397 greth_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
399 struct greth_private
*greth
= netdev_priv(dev
);
400 struct greth_bd
*bdp
;
401 int err
= NETDEV_TX_OK
;
402 u32 status
, dma_addr
, ctrl
;
406 greth_clean_tx(greth
->netdev
);
408 if (unlikely(greth
->tx_free
<= 0)) {
409 spin_lock_irqsave(&greth
->devlock
, flags
);/*save from poll/irq*/
410 ctrl
= GRETH_REGLOAD(greth
->regs
->control
);
411 /* Enable TX IRQ only if not already in poll() routine */
412 if (ctrl
& GRETH_RXI
)
413 GRETH_REGSAVE(greth
->regs
->control
, ctrl
| GRETH_TXI
);
414 netif_stop_queue(dev
);
415 spin_unlock_irqrestore(&greth
->devlock
, flags
);
416 return NETDEV_TX_BUSY
;
419 if (netif_msg_pktdata(greth
))
420 greth_print_tx_packet(skb
);
423 if (unlikely(skb
->len
> MAX_FRAME_SIZE
)) {
424 dev
->stats
.tx_errors
++;
428 bdp
= greth
->tx_bd_base
+ greth
->tx_next
;
429 dma_addr
= greth_read_bd(&bdp
->addr
);
431 memcpy((unsigned char *) phys_to_virt(dma_addr
), skb
->data
, skb
->len
);
433 dma_sync_single_for_device(greth
->dev
, dma_addr
, skb
->len
, DMA_TO_DEVICE
);
435 status
= GRETH_BD_EN
| GRETH_BD_IE
| (skb
->len
& GRETH_BD_LEN
);
436 greth
->tx_bufs_length
[greth
->tx_next
] = skb
->len
& GRETH_BD_LEN
;
438 /* Wrap around descriptor ring */
439 if (greth
->tx_next
== GRETH_TXBD_NUM_MASK
) {
440 status
|= GRETH_BD_WR
;
443 greth
->tx_next
= NEXT_TX(greth
->tx_next
);
446 /* Write descriptor control word and enable transmission */
447 greth_write_bd(&bdp
->stat
, status
);
448 spin_lock_irqsave(&greth
->devlock
, flags
); /*save from poll/irq*/
449 greth_enable_tx(greth
);
450 spin_unlock_irqrestore(&greth
->devlock
, flags
);
457 static inline u16
greth_num_free_bds(u16 tx_last
, u16 tx_next
)
459 if (tx_next
< tx_last
)
460 return (tx_last
- tx_next
) - 1;
462 return GRETH_TXBD_NUM
- (tx_next
- tx_last
) - 1;
466 greth_start_xmit_gbit(struct sk_buff
*skb
, struct net_device
*dev
)
468 struct greth_private
*greth
= netdev_priv(dev
);
469 struct greth_bd
*bdp
;
470 u32 status
, dma_addr
;
471 int curr_tx
, nr_frags
, i
, err
= NETDEV_TX_OK
;
475 nr_frags
= skb_shinfo(skb
)->nr_frags
;
476 tx_last
= greth
->tx_last
;
477 rmb(); /* tx_last is updated by the poll task */
479 if (greth_num_free_bds(tx_last
, greth
->tx_next
) < nr_frags
+ 1) {
480 netif_stop_queue(dev
);
481 err
= NETDEV_TX_BUSY
;
485 if (netif_msg_pktdata(greth
))
486 greth_print_tx_packet(skb
);
488 if (unlikely(skb
->len
> MAX_FRAME_SIZE
)) {
489 dev
->stats
.tx_errors
++;
493 /* Save skb pointer. */
494 greth
->tx_skbuff
[greth
->tx_next
] = skb
;
498 status
= GRETH_TXBD_MORE
;
500 status
= GRETH_BD_IE
;
502 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
503 status
|= GRETH_TXBD_CSALL
;
504 status
|= skb_headlen(skb
) & GRETH_BD_LEN
;
505 if (greth
->tx_next
== GRETH_TXBD_NUM_MASK
)
506 status
|= GRETH_BD_WR
;
509 bdp
= greth
->tx_bd_base
+ greth
->tx_next
;
510 greth_write_bd(&bdp
->stat
, status
);
511 dma_addr
= dma_map_single(greth
->dev
, skb
->data
, skb_headlen(skb
), DMA_TO_DEVICE
);
513 if (unlikely(dma_mapping_error(greth
->dev
, dma_addr
)))
516 greth_write_bd(&bdp
->addr
, dma_addr
);
518 curr_tx
= NEXT_TX(greth
->tx_next
);
521 for (i
= 0; i
< nr_frags
; i
++) {
522 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
523 greth
->tx_skbuff
[curr_tx
] = NULL
;
524 bdp
= greth
->tx_bd_base
+ curr_tx
;
526 status
= GRETH_BD_EN
;
527 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
528 status
|= GRETH_TXBD_CSALL
;
529 status
|= skb_frag_size(frag
) & GRETH_BD_LEN
;
531 /* Wrap around descriptor ring */
532 if (curr_tx
== GRETH_TXBD_NUM_MASK
)
533 status
|= GRETH_BD_WR
;
535 /* More fragments left */
536 if (i
< nr_frags
- 1)
537 status
|= GRETH_TXBD_MORE
;
539 status
|= GRETH_BD_IE
; /* enable IRQ on last fragment */
541 greth_write_bd(&bdp
->stat
, status
);
543 dma_addr
= skb_frag_dma_map(greth
->dev
, frag
, 0, skb_frag_size(frag
),
546 if (unlikely(dma_mapping_error(greth
->dev
, dma_addr
)))
549 greth_write_bd(&bdp
->addr
, dma_addr
);
551 curr_tx
= NEXT_TX(curr_tx
);
556 /* Enable the descriptor chain by enabling the first descriptor */
557 bdp
= greth
->tx_bd_base
+ greth
->tx_next
;
558 greth_write_bd(&bdp
->stat
,
559 greth_read_bd(&bdp
->stat
) | GRETH_BD_EN
);
561 spin_lock_irqsave(&greth
->devlock
, flags
); /*save from poll/irq*/
562 greth
->tx_next
= curr_tx
;
563 greth_enable_tx_and_irq(greth
);
564 spin_unlock_irqrestore(&greth
->devlock
, flags
);
569 /* Unmap SKB mappings that succeeded and disable descriptor */
570 for (i
= 0; greth
->tx_next
+ i
!= curr_tx
; i
++) {
571 bdp
= greth
->tx_bd_base
+ greth
->tx_next
+ i
;
572 dma_unmap_single(greth
->dev
,
573 greth_read_bd(&bdp
->addr
),
574 greth_read_bd(&bdp
->stat
) & GRETH_BD_LEN
,
576 greth_write_bd(&bdp
->stat
, 0);
580 dev_warn(greth
->dev
, "Could not create TX DMA mapping\n");
586 static irqreturn_t
greth_interrupt(int irq
, void *dev_id
)
588 struct net_device
*dev
= dev_id
;
589 struct greth_private
*greth
;
591 irqreturn_t retval
= IRQ_NONE
;
593 greth
= netdev_priv(dev
);
595 spin_lock(&greth
->devlock
);
597 /* Get the interrupt events that caused us to be here. */
598 status
= GRETH_REGLOAD(greth
->regs
->status
);
600 /* Must see if interrupts are enabled also, INT_TX|INT_RX flags may be
601 * set regardless of whether IRQ is enabled or not. Especially
602 * important when shared IRQ.
604 ctrl
= GRETH_REGLOAD(greth
->regs
->control
);
606 /* Handle rx and tx interrupts through poll */
607 if (((status
& (GRETH_INT_RE
| GRETH_INT_RX
)) && (ctrl
& GRETH_RXI
)) ||
608 ((status
& (GRETH_INT_TE
| GRETH_INT_TX
)) && (ctrl
& GRETH_TXI
))) {
609 retval
= IRQ_HANDLED
;
611 /* Disable interrupts and schedule poll() */
612 greth_disable_irqs(greth
);
613 napi_schedule(&greth
->napi
);
617 spin_unlock(&greth
->devlock
);
622 static void greth_clean_tx(struct net_device
*dev
)
624 struct greth_private
*greth
;
625 struct greth_bd
*bdp
;
628 greth
= netdev_priv(dev
);
631 bdp
= greth
->tx_bd_base
+ greth
->tx_last
;
632 GRETH_REGSAVE(greth
->regs
->status
, GRETH_INT_TE
| GRETH_INT_TX
);
634 stat
= greth_read_bd(&bdp
->stat
);
636 if (unlikely(stat
& GRETH_BD_EN
))
639 if (greth
->tx_free
== GRETH_TXBD_NUM
)
642 /* Check status for errors */
643 if (unlikely(stat
& GRETH_TXBD_STATUS
)) {
644 dev
->stats
.tx_errors
++;
645 if (stat
& GRETH_TXBD_ERR_AL
)
646 dev
->stats
.tx_aborted_errors
++;
647 if (stat
& GRETH_TXBD_ERR_UE
)
648 dev
->stats
.tx_fifo_errors
++;
650 dev
->stats
.tx_packets
++;
651 dev
->stats
.tx_bytes
+= greth
->tx_bufs_length
[greth
->tx_last
];
652 greth
->tx_last
= NEXT_TX(greth
->tx_last
);
656 if (greth
->tx_free
> 0) {
657 netif_wake_queue(dev
);
661 static inline void greth_update_tx_stats(struct net_device
*dev
, u32 stat
)
663 /* Check status for errors */
664 if (unlikely(stat
& GRETH_TXBD_STATUS
)) {
665 dev
->stats
.tx_errors
++;
666 if (stat
& GRETH_TXBD_ERR_AL
)
667 dev
->stats
.tx_aborted_errors
++;
668 if (stat
& GRETH_TXBD_ERR_UE
)
669 dev
->stats
.tx_fifo_errors
++;
670 if (stat
& GRETH_TXBD_ERR_LC
)
671 dev
->stats
.tx_aborted_errors
++;
673 dev
->stats
.tx_packets
++;
676 static void greth_clean_tx_gbit(struct net_device
*dev
)
678 struct greth_private
*greth
;
679 struct greth_bd
*bdp
, *bdp_last_frag
;
680 struct sk_buff
*skb
= NULL
;
685 greth
= netdev_priv(dev
);
686 tx_last
= greth
->tx_last
;
688 while (tx_last
!= greth
->tx_next
) {
690 skb
= greth
->tx_skbuff
[tx_last
];
692 nr_frags
= skb_shinfo(skb
)->nr_frags
;
694 /* We only clean fully completed SKBs */
695 bdp_last_frag
= greth
->tx_bd_base
+ SKIP_TX(tx_last
, nr_frags
);
697 GRETH_REGSAVE(greth
->regs
->status
, GRETH_INT_TE
| GRETH_INT_TX
);
699 stat
= greth_read_bd(&bdp_last_frag
->stat
);
701 if (stat
& GRETH_BD_EN
)
704 greth
->tx_skbuff
[tx_last
] = NULL
;
706 greth_update_tx_stats(dev
, stat
);
707 dev
->stats
.tx_bytes
+= skb
->len
;
709 bdp
= greth
->tx_bd_base
+ tx_last
;
711 tx_last
= NEXT_TX(tx_last
);
713 dma_unmap_single(greth
->dev
,
714 greth_read_bd(&bdp
->addr
),
718 for (i
= 0; i
< nr_frags
; i
++) {
719 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
720 bdp
= greth
->tx_bd_base
+ tx_last
;
722 dma_unmap_page(greth
->dev
,
723 greth_read_bd(&bdp
->addr
),
727 tx_last
= NEXT_TX(tx_last
);
731 if (skb
) { /* skb is set only if the above while loop was entered */
733 greth
->tx_last
= tx_last
;
735 if (netif_queue_stopped(dev
) &&
736 (greth_num_free_bds(tx_last
, greth
->tx_next
) >
738 netif_wake_queue(dev
);
742 static int greth_rx(struct net_device
*dev
, int limit
)
744 struct greth_private
*greth
;
745 struct greth_bd
*bdp
;
749 u32 status
, dma_addr
;
752 greth
= netdev_priv(dev
);
754 for (count
= 0; count
< limit
; ++count
) {
756 bdp
= greth
->rx_bd_base
+ greth
->rx_cur
;
757 GRETH_REGSAVE(greth
->regs
->status
, GRETH_INT_RE
| GRETH_INT_RX
);
759 status
= greth_read_bd(&bdp
->stat
);
761 if (unlikely(status
& GRETH_BD_EN
)) {
765 dma_addr
= greth_read_bd(&bdp
->addr
);
768 /* Check status for errors. */
769 if (unlikely(status
& GRETH_RXBD_STATUS
)) {
770 if (status
& GRETH_RXBD_ERR_FT
) {
771 dev
->stats
.rx_length_errors
++;
774 if (status
& (GRETH_RXBD_ERR_AE
| GRETH_RXBD_ERR_OE
)) {
775 dev
->stats
.rx_frame_errors
++;
778 if (status
& GRETH_RXBD_ERR_CRC
) {
779 dev
->stats
.rx_crc_errors
++;
784 dev
->stats
.rx_errors
++;
788 pkt_len
= status
& GRETH_BD_LEN
;
790 skb
= netdev_alloc_skb(dev
, pkt_len
+ NET_IP_ALIGN
);
792 if (unlikely(skb
== NULL
)) {
795 dev_warn(&dev
->dev
, "low on memory - " "packet dropped\n");
797 dev
->stats
.rx_dropped
++;
800 skb_reserve(skb
, NET_IP_ALIGN
);
802 dma_sync_single_for_cpu(greth
->dev
,
807 if (netif_msg_pktdata(greth
))
808 greth_print_rx_packet(phys_to_virt(dma_addr
), pkt_len
);
810 skb_put_data(skb
, phys_to_virt(dma_addr
),
813 skb
->protocol
= eth_type_trans(skb
, dev
);
814 dev
->stats
.rx_bytes
+= pkt_len
;
815 dev
->stats
.rx_packets
++;
816 netif_receive_skb(skb
);
820 status
= GRETH_BD_EN
| GRETH_BD_IE
;
821 if (greth
->rx_cur
== GRETH_RXBD_NUM_MASK
) {
822 status
|= GRETH_BD_WR
;
826 greth_write_bd(&bdp
->stat
, status
);
828 dma_sync_single_for_device(greth
->dev
, dma_addr
, MAX_FRAME_SIZE
, DMA_FROM_DEVICE
);
830 spin_lock_irqsave(&greth
->devlock
, flags
); /* save from XMIT */
831 greth_enable_rx(greth
);
832 spin_unlock_irqrestore(&greth
->devlock
, flags
);
834 greth
->rx_cur
= NEXT_RX(greth
->rx_cur
);
840 static inline int hw_checksummed(u32 status
)
843 if (status
& GRETH_RXBD_IP_FRAG
)
846 if (status
& GRETH_RXBD_IP
&& status
& GRETH_RXBD_IP_CSERR
)
849 if (status
& GRETH_RXBD_UDP
&& status
& GRETH_RXBD_UDP_CSERR
)
852 if (status
& GRETH_RXBD_TCP
&& status
& GRETH_RXBD_TCP_CSERR
)
858 static int greth_rx_gbit(struct net_device
*dev
, int limit
)
860 struct greth_private
*greth
;
861 struct greth_bd
*bdp
;
862 struct sk_buff
*skb
, *newskb
;
865 u32 status
, dma_addr
;
868 greth
= netdev_priv(dev
);
870 for (count
= 0; count
< limit
; ++count
) {
872 bdp
= greth
->rx_bd_base
+ greth
->rx_cur
;
873 skb
= greth
->rx_skbuff
[greth
->rx_cur
];
874 GRETH_REGSAVE(greth
->regs
->status
, GRETH_INT_RE
| GRETH_INT_RX
);
876 status
= greth_read_bd(&bdp
->stat
);
879 if (status
& GRETH_BD_EN
)
882 /* Check status for errors. */
883 if (unlikely(status
& GRETH_RXBD_STATUS
)) {
885 if (status
& GRETH_RXBD_ERR_FT
) {
886 dev
->stats
.rx_length_errors
++;
889 (GRETH_RXBD_ERR_AE
| GRETH_RXBD_ERR_OE
| GRETH_RXBD_ERR_LE
)) {
890 dev
->stats
.rx_frame_errors
++;
892 } else if (status
& GRETH_RXBD_ERR_CRC
) {
893 dev
->stats
.rx_crc_errors
++;
898 /* Allocate new skb to replace current, not needed if the
899 * current skb can be reused */
900 if (!bad
&& (newskb
=netdev_alloc_skb(dev
, MAX_FRAME_SIZE
+ NET_IP_ALIGN
))) {
901 skb_reserve(newskb
, NET_IP_ALIGN
);
903 dma_addr
= dma_map_single(greth
->dev
,
905 MAX_FRAME_SIZE
+ NET_IP_ALIGN
,
908 if (!dma_mapping_error(greth
->dev
, dma_addr
)) {
909 /* Process the incoming frame. */
910 pkt_len
= status
& GRETH_BD_LEN
;
912 dma_unmap_single(greth
->dev
,
913 greth_read_bd(&bdp
->addr
),
914 MAX_FRAME_SIZE
+ NET_IP_ALIGN
,
917 if (netif_msg_pktdata(greth
))
918 greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp
->addr
)), pkt_len
);
920 skb_put(skb
, pkt_len
);
922 if (dev
->features
& NETIF_F_RXCSUM
&& hw_checksummed(status
))
923 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
925 skb_checksum_none_assert(skb
);
927 skb
->protocol
= eth_type_trans(skb
, dev
);
928 dev
->stats
.rx_packets
++;
929 dev
->stats
.rx_bytes
+= pkt_len
;
930 netif_receive_skb(skb
);
932 greth
->rx_skbuff
[greth
->rx_cur
] = newskb
;
933 greth_write_bd(&bdp
->addr
, dma_addr
);
936 dev_warn(greth
->dev
, "Could not create DMA mapping, dropping packet\n");
937 dev_kfree_skb(newskb
);
938 /* reusing current skb, so it is a drop */
939 dev
->stats
.rx_dropped
++;
942 /* Bad Frame transfer, the skb is reused */
943 dev
->stats
.rx_dropped
++;
945 /* Failed Allocating a new skb. This is rather stupid
946 * but the current "filled" skb is reused, as if
947 * transfer failure. One could argue that RX descriptor
948 * table handling should be divided into cleaning and
949 * filling as the TX part of the driver
952 dev_warn(greth
->dev
, "Could not allocate SKB, dropping packet\n");
953 /* reusing current skb, so it is a drop */
954 dev
->stats
.rx_dropped
++;
957 status
= GRETH_BD_EN
| GRETH_BD_IE
;
958 if (greth
->rx_cur
== GRETH_RXBD_NUM_MASK
) {
959 status
|= GRETH_BD_WR
;
963 greth_write_bd(&bdp
->stat
, status
);
964 spin_lock_irqsave(&greth
->devlock
, flags
);
965 greth_enable_rx(greth
);
966 spin_unlock_irqrestore(&greth
->devlock
, flags
);
967 greth
->rx_cur
= NEXT_RX(greth
->rx_cur
);
974 static int greth_poll(struct napi_struct
*napi
, int budget
)
976 struct greth_private
*greth
;
980 greth
= container_of(napi
, struct greth_private
, napi
);
983 if (greth
->gbit_mac
) {
984 greth_clean_tx_gbit(greth
->netdev
);
985 work_done
+= greth_rx_gbit(greth
->netdev
, budget
- work_done
);
987 if (netif_queue_stopped(greth
->netdev
))
988 greth_clean_tx(greth
->netdev
);
989 work_done
+= greth_rx(greth
->netdev
, budget
- work_done
);
992 if (work_done
< budget
) {
994 spin_lock_irqsave(&greth
->devlock
, flags
);
996 ctrl
= GRETH_REGLOAD(greth
->regs
->control
);
997 if ((greth
->gbit_mac
&& (greth
->tx_last
!= greth
->tx_next
)) ||
998 (!greth
->gbit_mac
&& netif_queue_stopped(greth
->netdev
))) {
999 GRETH_REGSAVE(greth
->regs
->control
,
1000 ctrl
| GRETH_TXI
| GRETH_RXI
);
1001 mask
= GRETH_INT_RX
| GRETH_INT_RE
|
1002 GRETH_INT_TX
| GRETH_INT_TE
;
1004 GRETH_REGSAVE(greth
->regs
->control
, ctrl
| GRETH_RXI
);
1005 mask
= GRETH_INT_RX
| GRETH_INT_RE
;
1008 if (GRETH_REGLOAD(greth
->regs
->status
) & mask
) {
1009 GRETH_REGSAVE(greth
->regs
->control
, ctrl
);
1010 spin_unlock_irqrestore(&greth
->devlock
, flags
);
1011 goto restart_txrx_poll
;
1013 napi_complete_done(napi
, work_done
);
1014 spin_unlock_irqrestore(&greth
->devlock
, flags
);
1021 static int greth_set_mac_add(struct net_device
*dev
, void *p
)
1023 struct sockaddr
*addr
= p
;
1024 struct greth_private
*greth
;
1025 struct greth_regs
*regs
;
1027 greth
= netdev_priv(dev
);
1030 if (!is_valid_ether_addr(addr
->sa_data
))
1031 return -EADDRNOTAVAIL
;
1033 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
1034 GRETH_REGSAVE(regs
->esa_msb
, dev
->dev_addr
[0] << 8 | dev
->dev_addr
[1]);
1035 GRETH_REGSAVE(regs
->esa_lsb
, dev
->dev_addr
[2] << 24 | dev
->dev_addr
[3] << 16 |
1036 dev
->dev_addr
[4] << 8 | dev
->dev_addr
[5]);
1041 static u32
greth_hash_get_index(__u8
*addr
)
1043 return (ether_crc(6, addr
)) & 0x3F;
1046 static void greth_set_hash_filter(struct net_device
*dev
)
1048 struct netdev_hw_addr
*ha
;
1049 struct greth_private
*greth
= netdev_priv(dev
);
1050 struct greth_regs
*regs
= greth
->regs
;
1054 mc_filter
[0] = mc_filter
[1] = 0;
1056 netdev_for_each_mc_addr(ha
, dev
) {
1057 bitnr
= greth_hash_get_index(ha
->addr
);
1058 mc_filter
[bitnr
>> 5] |= 1 << (bitnr
& 31);
1061 GRETH_REGSAVE(regs
->hash_msb
, mc_filter
[1]);
1062 GRETH_REGSAVE(regs
->hash_lsb
, mc_filter
[0]);
1065 static void greth_set_multicast_list(struct net_device
*dev
)
1068 struct greth_private
*greth
= netdev_priv(dev
);
1069 struct greth_regs
*regs
= greth
->regs
;
1071 cfg
= GRETH_REGLOAD(regs
->control
);
1072 if (dev
->flags
& IFF_PROMISC
)
1073 cfg
|= GRETH_CTRL_PR
;
1075 cfg
&= ~GRETH_CTRL_PR
;
1077 if (greth
->multicast
) {
1078 if (dev
->flags
& IFF_ALLMULTI
) {
1079 GRETH_REGSAVE(regs
->hash_msb
, -1);
1080 GRETH_REGSAVE(regs
->hash_lsb
, -1);
1081 cfg
|= GRETH_CTRL_MCEN
;
1082 GRETH_REGSAVE(regs
->control
, cfg
);
1086 if (netdev_mc_empty(dev
)) {
1087 cfg
&= ~GRETH_CTRL_MCEN
;
1088 GRETH_REGSAVE(regs
->control
, cfg
);
1092 /* Setup multicast filter */
1093 greth_set_hash_filter(dev
);
1094 cfg
|= GRETH_CTRL_MCEN
;
1096 GRETH_REGSAVE(regs
->control
, cfg
);
1099 static u32
greth_get_msglevel(struct net_device
*dev
)
1101 struct greth_private
*greth
= netdev_priv(dev
);
1102 return greth
->msg_enable
;
1105 static void greth_set_msglevel(struct net_device
*dev
, u32 value
)
1107 struct greth_private
*greth
= netdev_priv(dev
);
1108 greth
->msg_enable
= value
;
1111 static int greth_get_regs_len(struct net_device
*dev
)
1113 return sizeof(struct greth_regs
);
1116 static void greth_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1118 struct greth_private
*greth
= netdev_priv(dev
);
1120 strlcpy(info
->driver
, dev_driver_string(greth
->dev
),
1121 sizeof(info
->driver
));
1122 strlcpy(info
->version
, "revision: 1.0", sizeof(info
->version
));
1123 strlcpy(info
->bus_info
, greth
->dev
->bus
->name
, sizeof(info
->bus_info
));
1124 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
1127 static void greth_get_regs(struct net_device
*dev
, struct ethtool_regs
*regs
, void *p
)
1130 struct greth_private
*greth
= netdev_priv(dev
);
1131 u32 __iomem
*greth_regs
= (u32 __iomem
*) greth
->regs
;
1134 for (i
= 0; i
< sizeof(struct greth_regs
) / sizeof(u32
); i
++)
1135 buff
[i
] = greth_read_bd(&greth_regs
[i
]);
1138 static const struct ethtool_ops greth_ethtool_ops
= {
1139 .get_msglevel
= greth_get_msglevel
,
1140 .set_msglevel
= greth_set_msglevel
,
1141 .get_drvinfo
= greth_get_drvinfo
,
1142 .get_regs_len
= greth_get_regs_len
,
1143 .get_regs
= greth_get_regs
,
1144 .get_link
= ethtool_op_get_link
,
1145 .get_link_ksettings
= phy_ethtool_get_link_ksettings
,
1146 .set_link_ksettings
= phy_ethtool_set_link_ksettings
,
1149 static struct net_device_ops greth_netdev_ops
= {
1150 .ndo_open
= greth_open
,
1151 .ndo_stop
= greth_close
,
1152 .ndo_start_xmit
= greth_start_xmit
,
1153 .ndo_set_mac_address
= greth_set_mac_add
,
1154 .ndo_validate_addr
= eth_validate_addr
,
1157 static inline int wait_for_mdio(struct greth_private
*greth
)
1159 unsigned long timeout
= jiffies
+ 4*HZ
/100;
1160 while (GRETH_REGLOAD(greth
->regs
->mdio
) & GRETH_MII_BUSY
) {
1161 if (time_after(jiffies
, timeout
))
1167 static int greth_mdio_read(struct mii_bus
*bus
, int phy
, int reg
)
1169 struct greth_private
*greth
= bus
->priv
;
1172 if (!wait_for_mdio(greth
))
1175 GRETH_REGSAVE(greth
->regs
->mdio
, ((phy
& 0x1F) << 11) | ((reg
& 0x1F) << 6) | 2);
1177 if (!wait_for_mdio(greth
))
1180 if (!(GRETH_REGLOAD(greth
->regs
->mdio
) & GRETH_MII_NVALID
)) {
1181 data
= (GRETH_REGLOAD(greth
->regs
->mdio
) >> 16) & 0xFFFF;
1189 static int greth_mdio_write(struct mii_bus
*bus
, int phy
, int reg
, u16 val
)
1191 struct greth_private
*greth
= bus
->priv
;
1193 if (!wait_for_mdio(greth
))
1196 GRETH_REGSAVE(greth
->regs
->mdio
,
1197 ((val
& 0xFFFF) << 16) | ((phy
& 0x1F) << 11) | ((reg
& 0x1F) << 6) | 1);
1199 if (!wait_for_mdio(greth
))
1205 static void greth_link_change(struct net_device
*dev
)
1207 struct greth_private
*greth
= netdev_priv(dev
);
1208 struct phy_device
*phydev
= dev
->phydev
;
1209 unsigned long flags
;
1210 int status_change
= 0;
1213 spin_lock_irqsave(&greth
->devlock
, flags
);
1217 if ((greth
->speed
!= phydev
->speed
) || (greth
->duplex
!= phydev
->duplex
)) {
1218 ctrl
= GRETH_REGLOAD(greth
->regs
->control
) &
1219 ~(GRETH_CTRL_FD
| GRETH_CTRL_SP
| GRETH_CTRL_GB
);
1222 ctrl
|= GRETH_CTRL_FD
;
1224 if (phydev
->speed
== SPEED_100
)
1225 ctrl
|= GRETH_CTRL_SP
;
1226 else if (phydev
->speed
== SPEED_1000
)
1227 ctrl
|= GRETH_CTRL_GB
;
1229 GRETH_REGSAVE(greth
->regs
->control
, ctrl
);
1230 greth
->speed
= phydev
->speed
;
1231 greth
->duplex
= phydev
->duplex
;
1236 if (phydev
->link
!= greth
->link
) {
1237 if (!phydev
->link
) {
1241 greth
->link
= phydev
->link
;
1246 spin_unlock_irqrestore(&greth
->devlock
, flags
);
1248 if (status_change
) {
1250 pr_debug("%s: link up (%d/%s)\n",
1251 dev
->name
, phydev
->speed
,
1252 DUPLEX_FULL
== phydev
->duplex
? "Full" : "Half");
1254 pr_debug("%s: link down\n", dev
->name
);
1258 static int greth_mdio_probe(struct net_device
*dev
)
1260 struct greth_private
*greth
= netdev_priv(dev
);
1261 struct phy_device
*phy
= NULL
;
1264 /* Find the first PHY */
1265 phy
= phy_find_first(greth
->mdio
);
1268 if (netif_msg_probe(greth
))
1269 dev_err(&dev
->dev
, "no PHY found\n");
1273 ret
= phy_connect_direct(dev
, phy
, &greth_link_change
,
1274 greth
->gbit_mac
? PHY_INTERFACE_MODE_GMII
: PHY_INTERFACE_MODE_MII
);
1276 if (netif_msg_ifup(greth
))
1277 dev_err(&dev
->dev
, "could not attach to PHY\n");
1281 if (greth
->gbit_mac
)
1282 phy
->supported
&= PHY_GBIT_FEATURES
;
1284 phy
->supported
&= PHY_BASIC_FEATURES
;
1286 phy
->advertising
= phy
->supported
;
1295 static int greth_mdio_init(struct greth_private
*greth
)
1298 unsigned long timeout
;
1299 struct net_device
*ndev
= greth
->netdev
;
1301 greth
->mdio
= mdiobus_alloc();
1306 greth
->mdio
->name
= "greth-mdio";
1307 snprintf(greth
->mdio
->id
, MII_BUS_ID_SIZE
, "%s-%d", greth
->mdio
->name
, greth
->irq
);
1308 greth
->mdio
->read
= greth_mdio_read
;
1309 greth
->mdio
->write
= greth_mdio_write
;
1310 greth
->mdio
->priv
= greth
;
1312 ret
= mdiobus_register(greth
->mdio
);
1317 ret
= greth_mdio_probe(greth
->netdev
);
1319 if (netif_msg_probe(greth
))
1320 dev_err(&greth
->netdev
->dev
, "failed to probe MDIO bus\n");
1324 phy_start(ndev
->phydev
);
1326 /* If Ethernet debug link is used make autoneg happen right away */
1327 if (greth
->edcl
&& greth_edcl
== 1) {
1328 phy_start_aneg(ndev
->phydev
);
1329 timeout
= jiffies
+ 6*HZ
;
1330 while (!phy_aneg_done(ndev
->phydev
) &&
1331 time_before(jiffies
, timeout
)) {
1333 phy_read_status(ndev
->phydev
);
1334 greth_link_change(greth
->netdev
);
1340 mdiobus_unregister(greth
->mdio
);
1342 mdiobus_free(greth
->mdio
);
1346 /* Initialize the GRETH MAC */
1347 static int greth_of_probe(struct platform_device
*ofdev
)
1349 struct net_device
*dev
;
1350 struct greth_private
*greth
;
1351 struct greth_regs
*regs
;
1356 unsigned long timeout
;
1358 dev
= alloc_etherdev(sizeof(struct greth_private
));
1363 greth
= netdev_priv(dev
);
1364 greth
->netdev
= dev
;
1365 greth
->dev
= &ofdev
->dev
;
1367 if (greth_debug
> 0)
1368 greth
->msg_enable
= greth_debug
;
1370 greth
->msg_enable
= GRETH_DEF_MSG_ENABLE
;
1372 spin_lock_init(&greth
->devlock
);
1374 greth
->regs
= of_ioremap(&ofdev
->resource
[0], 0,
1375 resource_size(&ofdev
->resource
[0]),
1376 "grlib-greth regs");
1378 if (greth
->regs
== NULL
) {
1379 if (netif_msg_probe(greth
))
1380 dev_err(greth
->dev
, "ioremap failure.\n");
1386 greth
->irq
= ofdev
->archdata
.irqs
[0];
1388 dev_set_drvdata(greth
->dev
, dev
);
1389 SET_NETDEV_DEV(dev
, greth
->dev
);
1391 if (netif_msg_probe(greth
))
1392 dev_dbg(greth
->dev
, "resetting controller.\n");
1394 /* Reset the controller. */
1395 GRETH_REGSAVE(regs
->control
, GRETH_RESET
);
1397 /* Wait for MAC to reset itself */
1398 timeout
= jiffies
+ HZ
/100;
1399 while (GRETH_REGLOAD(regs
->control
) & GRETH_RESET
) {
1400 if (time_after(jiffies
, timeout
)) {
1402 if (netif_msg_probe(greth
))
1403 dev_err(greth
->dev
, "timeout when waiting for reset.\n");
1408 /* Get default PHY address */
1409 greth
->phyaddr
= (GRETH_REGLOAD(regs
->mdio
) >> 11) & 0x1F;
1411 /* Check if we have GBIT capable MAC */
1412 tmp
= GRETH_REGLOAD(regs
->control
);
1413 greth
->gbit_mac
= (tmp
>> 27) & 1;
1415 /* Check for multicast capability */
1416 greth
->multicast
= (tmp
>> 25) & 1;
1418 greth
->edcl
= (tmp
>> 31) & 1;
1420 /* If we have EDCL we disable the EDCL speed-duplex FSM so
1421 * it doesn't interfere with the software */
1422 if (greth
->edcl
!= 0)
1423 GRETH_REGORIN(regs
->control
, GRETH_CTRL_DISDUPLEX
);
1425 /* Check if MAC can handle MDIO interrupts */
1426 greth
->mdio_int_en
= (tmp
>> 26) & 1;
1428 err
= greth_mdio_init(greth
);
1430 if (netif_msg_probe(greth
))
1431 dev_err(greth
->dev
, "failed to register MDIO bus\n");
1435 /* Allocate TX descriptor ring in coherent memory */
1436 greth
->tx_bd_base
= dma_zalloc_coherent(greth
->dev
, 1024,
1437 &greth
->tx_bd_base_phys
,
1439 if (!greth
->tx_bd_base
) {
1444 /* Allocate RX descriptor ring in coherent memory */
1445 greth
->rx_bd_base
= dma_zalloc_coherent(greth
->dev
, 1024,
1446 &greth
->rx_bd_base_phys
,
1448 if (!greth
->rx_bd_base
) {
1453 /* Get MAC address from: module param, OF property or ID prom */
1454 for (i
= 0; i
< 6; i
++) {
1455 if (macaddr
[i
] != 0)
1461 addr
= of_get_mac_address(ofdev
->dev
.of_node
);
1463 for (i
= 0; i
< 6; i
++)
1464 macaddr
[i
] = (unsigned int) addr
[i
];
1467 for (i
= 0; i
< 6; i
++)
1468 macaddr
[i
] = (unsigned int) idprom
->id_ethaddr
[i
];
1473 for (i
= 0; i
< 6; i
++)
1474 dev
->dev_addr
[i
] = macaddr
[i
];
1478 if (!is_valid_ether_addr(&dev
->dev_addr
[0])) {
1479 if (netif_msg_probe(greth
))
1480 dev_err(greth
->dev
, "no valid ethernet address, aborting.\n");
1485 GRETH_REGSAVE(regs
->esa_msb
, dev
->dev_addr
[0] << 8 | dev
->dev_addr
[1]);
1486 GRETH_REGSAVE(regs
->esa_lsb
, dev
->dev_addr
[2] << 24 | dev
->dev_addr
[3] << 16 |
1487 dev
->dev_addr
[4] << 8 | dev
->dev_addr
[5]);
1489 /* Clear all pending interrupts except PHY irq */
1490 GRETH_REGSAVE(regs
->status
, 0xFF);
1492 if (greth
->gbit_mac
) {
1493 dev
->hw_features
= NETIF_F_SG
| NETIF_F_IP_CSUM
|
1495 dev
->features
= dev
->hw_features
| NETIF_F_HIGHDMA
;
1496 greth_netdev_ops
.ndo_start_xmit
= greth_start_xmit_gbit
;
1499 if (greth
->multicast
) {
1500 greth_netdev_ops
.ndo_set_rx_mode
= greth_set_multicast_list
;
1501 dev
->flags
|= IFF_MULTICAST
;
1503 dev
->flags
&= ~IFF_MULTICAST
;
1506 dev
->netdev_ops
= &greth_netdev_ops
;
1507 dev
->ethtool_ops
= &greth_ethtool_ops
;
1509 err
= register_netdev(dev
);
1511 if (netif_msg_probe(greth
))
1512 dev_err(greth
->dev
, "netdevice registration failed.\n");
1517 netif_napi_add(dev
, &greth
->napi
, greth_poll
, 64);
1522 dma_free_coherent(greth
->dev
, 1024, greth
->rx_bd_base
, greth
->rx_bd_base_phys
);
1524 dma_free_coherent(greth
->dev
, 1024, greth
->tx_bd_base
, greth
->tx_bd_base_phys
);
1526 mdiobus_unregister(greth
->mdio
);
1528 of_iounmap(&ofdev
->resource
[0], greth
->regs
, resource_size(&ofdev
->resource
[0]));
1534 static int greth_of_remove(struct platform_device
*of_dev
)
1536 struct net_device
*ndev
= platform_get_drvdata(of_dev
);
1537 struct greth_private
*greth
= netdev_priv(ndev
);
1539 /* Free descriptor areas */
1540 dma_free_coherent(&of_dev
->dev
, 1024, greth
->rx_bd_base
, greth
->rx_bd_base_phys
);
1542 dma_free_coherent(&of_dev
->dev
, 1024, greth
->tx_bd_base
, greth
->tx_bd_base_phys
);
1545 phy_stop(ndev
->phydev
);
1546 mdiobus_unregister(greth
->mdio
);
1548 unregister_netdev(ndev
);
1551 of_iounmap(&of_dev
->resource
[0], greth
->regs
, resource_size(&of_dev
->resource
[0]));
1556 static const struct of_device_id greth_of_match
[] = {
1558 .name
= "GAISLER_ETHMAC",
1566 MODULE_DEVICE_TABLE(of
, greth_of_match
);
1568 static struct platform_driver greth_of_driver
= {
1570 .name
= "grlib-greth",
1571 .of_match_table
= greth_of_match
,
1573 .probe
= greth_of_probe
,
1574 .remove
= greth_of_remove
,
1577 module_platform_driver(greth_of_driver
);
1579 MODULE_AUTHOR("Aeroflex Gaisler AB.");
1580 MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver");
1581 MODULE_LICENSE("GPL");