2 * Moschip MCS8140 Ethernet MAC driver
4 * Copyright (C) 2003, Moschip Semiconductors
5 * Copyright (C) 2012, Florian Fainelli <florian@openwrt.org>
9 #include <linux/module.h>
10 #include <linux/slab.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <linux/delay.h>
16 #include <linux/ethtool.h>
17 #include <linux/mii.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
22 #include <linux/irq.h>
23 #include <linux/err.h>
24 #include <linux/phy.h>
25 #include <linux/clk.h>
26 #include <linux/dma-mapping.h>
28 #include <asm/unaligned.h>
29 #include <asm/sizes.h>
30 #include <mach/hardware.h>
32 /* Hardware registers */
33 #define MAC_BASE_ADDR ((priv->mac_base))
35 #define CTRL_REG (MAC_BASE_ADDR)
36 #define MII_BUSY 0x00000001
37 #define MII_WRITE 0x00000002
38 #define MAC_ADDR_HIGH_REG (MAC_BASE_ADDR + 0x04)
39 #define MAC_ADDR_LOW_REG (MAC_BASE_ADDR + 0x08)
40 #define MII_ADDR_REG (MAC_BASE_ADDR + 0x14)
41 #define MII_DATA_REG (MAC_BASE_ADDR + 0x18)
42 /* Link interrupt registers */
43 #define LINK_INT_CSR (MAC_BASE_ADDR + 0xD0)
44 #define LINK_INT_POLL_TIME (MAC_BASE_ADDR + 0xD4)
46 #define DMA_CHAN_WIDTH 32
50 /* Receive DMA registers */
51 #define RX_DMA_BASE ((priv->dma_base) + \
52 (DMA_CHAN_WIDTH * DMA_RX_CHAN))
53 #define RX_BUFFER_ADDR (RX_DMA_BASE + 0x00)
54 #define RX_MAX_BYTES (RX_DMA_BASE + 0x04)
55 #define RX_ACT_BYTES (RX_DMA_BASE + 0x08)
56 #define RX_START_DMA (RX_DMA_BASE + 0x0C)
57 #define RX_DMA_ENH (RX_DMA_BASE + 0x14)
59 /* Transmit DMA registers */
60 #define TX_DMA_BASE ((priv->dma_base) + \
61 (DMA_CHAN_WIDTH * DMA_TX_CHAN))
62 #define TX_BUFFER_ADDR (TX_DMA_BASE + 0x00)
63 #define TX_PKT_BYTES (TX_DMA_BASE + 0x04)
64 #define TX_BYTES_SENT (TX_DMA_BASE + 0x08)
65 #define TX_START_DMA (TX_DMA_BASE + 0x0C)
66 #define TX_DMA_STATUS (TX_DMA_BASE + 0x10)
67 #define TX_DMA_ENH (TX_DMA_BASE + 0x14)
69 #define RX_ALLOC_SIZE SZ_2K
70 #define MAX_ETH_FRAME_SIZE 1536
71 #define RX_SKB_TAILROOM 128
72 #define RX_SKB_HEADROOM (RX_ALLOC_SIZE - \
73 (MAX_ETH_FRAME_SIZE + RX_SKB_TAILROOM) + 0)
75 /* WDT Late COL Lenght COL Type */
76 #define ERROR_FILTER_MASK ((1<<14) | (1<<15) | (1<<16) | (1<<17) | (0<<18) | \
77 /* MII Dribbling CRC Len/type Control */\
78 (1<<19) | (1<<20) | (1<<21) | (0<<24) | (1<<25) | \
81 #define TX_RING_SIZE 30
82 #define RX_RING_SIZE 30
84 static inline u32
nuport_mac_readl(void __iomem
*reg
)
86 return __raw_readl(reg
);
89 static inline u8
nuport_mac_readb(void __iomem
*reg
)
91 return __raw_readb(reg
);
94 static inline void nuport_mac_writel(u32 value
, void __iomem
*reg
)
96 __raw_writel(value
, reg
);
99 static inline void nuport_mac_writeb(u8 value
, void __iomem
*reg
)
101 __raw_writel(value
, reg
);
104 /* MAC private data */
105 struct nuport_mac_priv
{
108 void __iomem
*mac_base
;
109 void __iomem
*dma_base
;
114 struct clk
*emac_clk
;
115 struct clk
*ephy_clk
;
117 /* Transmit buffers */
118 struct sk_buff
*tx_skb
[TX_RING_SIZE
];
119 unsigned int valid_txskb
[TX_RING_SIZE
];
122 unsigned int tx_full
;
124 /* Receive buffers */
125 struct sk_buff
*rx_skb
[RX_RING_SIZE
];
126 unsigned int irq_rxskb
[RX_RING_SIZE
];
127 int pkt_len
[RX_RING_SIZE
];
130 unsigned int rx_full
;
132 unsigned int first_pkt
;
135 struct napi_struct napi
;
136 struct net_device
*dev
;
137 struct platform_device
*pdev
;
138 struct mii_bus
*mii_bus
;
139 struct phy_device
*phydev
;
144 void dcache_invalidate_only(unsigned long start
, unsigned long end
)
148 "1: mcr p15, 0, r0, c7, c6, 1\n"
150 " cmp r0, r1\n" " blo 1b\n");
153 void dcache_clean_range(unsigned long start
, unsigned long end
)
157 "1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry\n"
161 " mcr p15, 0, r0, c7, c10, 4 @ drain WB\n");
164 static inline int nuport_mac_mii_busy_wait(struct nuport_mac_priv
*priv
)
167 unsigned long finish
= jiffies
+ 3 * HZ
;
171 if (!(nuport_mac_readl(MII_ADDR_REG
) & MII_BUSY
))
174 } while (!time_after_eq(curr
, finish
));
179 /* Read from PHY registers */
180 static int nuport_mac_mii_read(struct mii_bus
*bus
,
181 int mii_id
, int regnum
)
183 struct net_device
*dev
= bus
->priv
;
184 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
188 ret
= nuport_mac_mii_busy_wait(priv
);
192 val
|= (mii_id
<< 11) | (regnum
<< 6) | MII_BUSY
;
193 nuport_mac_writel(val
, MII_ADDR_REG
);
194 ret
= nuport_mac_mii_busy_wait(priv
);
198 return nuport_mac_readl(MII_DATA_REG
);
201 static int nuport_mac_mii_write(struct mii_bus
*bus
, int mii_id
,
202 int regnum
, u16 value
)
204 struct net_device
*dev
= bus
->priv
;
205 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
209 ret
= nuport_mac_mii_busy_wait(priv
);
213 val
|= (mii_id
<< 11) | (regnum
<< 6) | MII_BUSY
| MII_WRITE
;
214 nuport_mac_writel(value
, MII_DATA_REG
);
215 nuport_mac_writel(val
, MII_ADDR_REG
);
217 return nuport_mac_mii_busy_wait(priv
);
220 static int nuport_mac_mii_reset(struct mii_bus
*bus
)
225 static int nuport_mac_start_tx_dma(struct nuport_mac_priv
*priv
,
230 unsigned int timeout
= 2048;
233 reg
= nuport_mac_readl(TX_START_DMA
);
242 p
= dma_map_single(&priv
->pdev
->dev
, skb
->data
,
243 skb
->len
, DMA_TO_DEVICE
);
245 /* enable enhanced mode */
246 nuport_mac_writel(0x03, TX_DMA_ENH
);
247 nuport_mac_writel(p
, TX_BUFFER_ADDR
);
248 nuport_mac_writel((skb
->len
) - 1, TX_PKT_BYTES
);
250 nuport_mac_writel(0x0D, TX_START_DMA
);
255 static void nuport_mac_reset_tx_dma(struct nuport_mac_priv
*priv
)
259 reg
= nuport_mac_readl(TX_START_DMA
);
261 nuport_mac_writel(reg
, TX_START_DMA
);
264 static void nuport_mac_start_rx_dma(struct nuport_mac_priv
*priv
,
269 p
= dma_map_single(&priv
->pdev
->dev
, skb
->data
,
270 RX_ALLOC_SIZE
, DMA_FROM_DEVICE
);
272 nuport_mac_writel(p
, RX_BUFFER_ADDR
);
274 nuport_mac_writel(0x01, RX_START_DMA
);
277 static void nuport_mac_reset_rx_dma(struct nuport_mac_priv
*priv
)
281 reg
= nuport_mac_readl(RX_START_DMA
);
283 nuport_mac_writel(reg
, RX_START_DMA
);
286 /* I suppose this might do something, but I am not sure actually */
287 static void nuport_mac_disable_rx_dma(struct nuport_mac_priv
*priv
)
291 reg
= nuport_mac_readl(RX_DMA_ENH
);
293 nuport_mac_writel(reg
, RX_DMA_ENH
);
296 static void nuport_mac_enable_rx_dma(struct nuport_mac_priv
*priv
)
300 reg
= nuport_mac_readl(RX_DMA_ENH
);
302 nuport_mac_writel(reg
, RX_DMA_ENH
);
305 /* Add packets to the transmit queue */
306 static int nuport_mac_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
309 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
312 dcache_clean_range((u32
) skb
->data
, (u32
)(skb
->data
+ skb
->len
));
313 spin_lock_irqsave(&priv
->lock
, flags
);
314 if (priv
->first_pkt
) {
315 ret
= nuport_mac_start_tx_dma(priv
, skb
);
317 spin_unlock_irqrestore(&priv
->lock
, flags
);
318 netdev_err(dev
, "transmit path busy\n");
319 return NETDEV_TX_BUSY
;
324 priv
->tx_skb
[priv
->cur_tx
] = skb
;
325 dev
->stats
.tx_bytes
+= skb
->len
;
326 dev
->stats
.tx_packets
++;
327 priv
->valid_txskb
[priv
->cur_tx
] = 1;
329 dev
->trans_start
= jiffies
;
331 if (priv
->cur_tx
>= TX_RING_SIZE
)
334 spin_unlock_irqrestore(&priv
->lock
, flags
);
336 if (priv
->valid_txskb
[priv
->cur_tx
]) {
338 netif_stop_queue(dev
);
344 static void nuport_mac_adjust_link(struct net_device
*dev
)
346 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
347 struct phy_device
*phydev
= priv
->phydev
;
348 unsigned int status_changed
= 0;
353 if (priv
->old_link
!= phydev
->link
) {
355 priv
->old_link
= phydev
->link
;
358 if (phydev
->link
& (priv
->old_duplex
!= phydev
->duplex
)) {
359 reg
= nuport_mac_readl(CTRL_REG
);
360 if (phydev
->duplex
== DUPLEX_FULL
)
364 nuport_mac_writel(reg
, CTRL_REG
);
367 priv
->old_duplex
= phydev
->duplex
;
373 pr_info("%s: link %s", dev
->name
, phydev
->link
?
376 pr_cont(" - %d/%s", phydev
->speed
,
377 phydev
->duplex
== DUPLEX_FULL
? "full" : "half");
382 static irqreturn_t
nuport_mac_link_interrupt(int irq
, void *dev_id
)
384 struct net_device
*dev
= dev_id
;
385 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
389 reg
= nuport_mac_readl(LINK_INT_CSR
);
390 phy_addr
= (reg
>> 1) & 0x0f;
392 if (phy_addr
!= priv
->phydev
->addr
) {
393 netdev_err(dev
, "spurious PHY irq (phy: %d)\n", phy_addr
);
397 priv
->phydev
->link
= (reg
& (1 << 16));
398 nuport_mac_adjust_link(dev
);
403 static irqreturn_t
nuport_mac_tx_interrupt(int irq
, void *dev_id
)
405 struct net_device
*dev
= (struct net_device
*)dev_id
;
406 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
411 spin_lock_irqsave(&priv
->lock
, flags
);
412 skb
= priv
->tx_skb
[priv
->dma_tx
];
413 priv
->tx_skb
[priv
->dma_tx
] = NULL
;
414 priv
->valid_txskb
[priv
->dma_tx
] = 0;
415 dev_kfree_skb_irq(skb
);
418 if (priv
->dma_tx
>= TX_RING_SIZE
)
421 if (!priv
->valid_txskb
[priv
->dma_tx
])
424 ret
= nuport_mac_start_tx_dma(priv
, priv
->tx_skb
[priv
->dma_tx
]);
426 netdev_err(dev
, "failed to restart TX dma\n");
430 netdev_err(dev
, "restarting transmit queue\n");
431 netif_wake_queue(dev
);
435 spin_unlock_irqrestore(&priv
->lock
, flags
);
440 static unsigned int nuport_mac_has_work(struct nuport_mac_priv
*priv
)
444 for (i
= 0; i
< RX_RING_SIZE
; i
++)
445 if (priv
->irq_rxskb
[i
])
451 static irqreturn_t
nuport_mac_rx_interrupt(int irq
, void *dev_id
)
453 struct net_device
*dev
= (struct net_device
*)dev_id
;
454 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
457 spin_lock_irqsave(&priv
->lock
, flags
);
458 priv
->pkt_len
[priv
->dma_rx
] = nuport_mac_readl(RX_ACT_BYTES
) - 4;
459 priv
->irq_rxskb
[priv
->dma_rx
] = 0;
462 if (priv
->dma_rx
>= RX_RING_SIZE
)
465 if (priv
->irq_rxskb
[priv
->dma_rx
] == 1)
466 nuport_mac_start_rx_dma(priv
, priv
->rx_skb
[priv
->dma_rx
]);
468 if (likely(nuport_mac_has_work(priv
))) {
469 /* find a way to disable DMA rx irq */
470 nuport_mac_disable_rx_dma(priv
);
471 napi_schedule(&priv
->napi
);
474 spin_unlock_irqrestore(&priv
->lock
, flags
);
479 /* Process received packets in tasklet */
480 static int nuport_mac_rx(struct net_device
*dev
, int limit
)
482 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
487 while (count
< limit
&& !priv
->irq_rxskb
[priv
->cur_rx
]) {
488 skb
= priv
->rx_skb
[priv
->cur_rx
];
489 len
= priv
->pkt_len
[priv
->cur_rx
];
490 dcache_invalidate_only(((u32
) skb
->data
),
491 ((u32
) (skb
->data
+ len
+ 4)));
493 /* Remove 2 bytes added by RX buffer shifting */
495 skb
->data
= skb
->data
+ 2;
497 /* Get packet status */
498 status
= get_unaligned((u32
*) (skb
->data
+ len
));
501 /* packet filter failed */
502 if (!(status
& (1 << 30))) {
503 dev_kfree_skb_irq(skb
);
508 if (status
& (1 << 31)) {
509 dev
->stats
.rx_missed_errors
++;
510 dev_kfree_skb_irq(skb
);
514 /* Not ethernet type */
515 if ((!(status
& (1 << 18))) || (status
& ERROR_FILTER_MASK
))
516 dev
->stats
.rx_errors
++;
518 if (len
> MAX_ETH_FRAME_SIZE
) {
519 dev_kfree_skb_irq(skb
);
524 skb
->protocol
= eth_type_trans(skb
, dev
);
525 dev
->stats
.rx_packets
++;
527 if (status
& (1 << 29))
528 skb
->pkt_type
= PACKET_OTHERHOST
;
529 if (status
& (1 << 27))
530 skb
->pkt_type
= PACKET_MULTICAST
;
531 if (status
& (1 << 28))
532 skb
->pkt_type
= PACKET_BROADCAST
;
534 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
536 /* Pass the received packet to network layer */
537 netif_receive_skb(skb
);
539 if (status
!= NET_RX_DROP
)
540 dev
->stats
.rx_bytes
+= len
- 4; /* Without CRC */
542 dev
->stats
.rx_dropped
++;
544 dev
->last_rx
= jiffies
;
547 skb
= netdev_alloc_skb(dev
, RX_ALLOC_SIZE
);
548 skb_reserve(skb
, RX_SKB_HEADROOM
);
549 priv
->rx_skb
[priv
->cur_rx
] = skb
;
550 priv
->irq_rxskb
[priv
->cur_rx
] = 1;
553 if (priv
->cur_rx
>= RX_RING_SIZE
)
561 static int nuport_mac_poll(struct napi_struct
*napi
, int budget
)
563 struct nuport_mac_priv
*priv
=
564 container_of(napi
, struct nuport_mac_priv
, napi
);
565 struct net_device
*dev
= priv
->dev
;
568 work_done
= nuport_mac_rx(dev
, budget
);
570 if (work_done
< budget
) {
572 nuport_mac_enable_rx_dma(priv
);
578 static void nuport_mac_init_tx_ring(struct nuport_mac_priv
*priv
)
582 priv
->cur_tx
= priv
->dma_tx
= priv
->tx_full
= 0;
583 for (i
= 0; i
< TX_RING_SIZE
; i
++) {
584 priv
->tx_skb
[i
] = NULL
;
585 priv
->valid_txskb
[i
] = 0;
590 static int nuport_mac_init_rx_ring(struct net_device
*dev
)
592 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
596 priv
->cur_rx
= priv
->dma_rx
= priv
->rx_full
= 0;
598 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
599 skb
= netdev_alloc_skb(dev
, RX_ALLOC_SIZE
);
602 skb_reserve(skb
, RX_SKB_HEADROOM
);
603 priv
->rx_skb
[i
] = skb
;
604 priv
->irq_rxskb
[i
] = 1;
610 static void nuport_mac_free_rx_ring(struct nuport_mac_priv
*priv
)
614 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
615 if (!priv
->rx_skb
[i
])
618 dev_kfree_skb(priv
->rx_skb
[i
]);
619 priv
->rx_skb
[i
] = NULL
;
623 static void nuport_mac_read_mac_address(struct net_device
*dev
)
625 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
628 for (i
= 0; i
< 4; i
++)
629 dev
->dev_addr
[i
] = nuport_mac_readb(MAC_ADDR_LOW_REG
+ i
);
630 dev
->dev_addr
[4] = nuport_mac_readb(MAC_ADDR_HIGH_REG
);
631 dev
->dev_addr
[5] = nuport_mac_readb(MAC_ADDR_HIGH_REG
+ 1);
633 if (!is_valid_ether_addr(dev
->dev_addr
)) {
634 dev_info(&priv
->pdev
->dev
, "using random address\n");
635 random_ether_addr(dev
->dev_addr
);
639 static int nuport_mac_change_mac_address(struct net_device
*dev
, void *mac_addr
)
641 struct sockaddr
*addr
= mac_addr
;
642 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
643 unsigned long *temp
= (unsigned long *)dev
->dev_addr
;
646 if (netif_running(dev
))
649 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
651 spin_lock_irq(&priv
->lock
);
653 nuport_mac_writel(*temp
, MAC_ADDR_LOW_REG
);
654 temp
= (unsigned long *)(dev
->dev_addr
+ 4);
655 nuport_mac_writel(*temp
, MAC_ADDR_HIGH_REG
);
657 low
= nuport_mac_readl(MAC_ADDR_LOW_REG
);
658 high
= nuport_mac_readl(MAC_ADDR_HIGH_REG
);
660 spin_unlock_irq(&priv
->lock
);
665 static int nuport_mac_open(struct net_device
*dev
)
668 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
673 /* Enable hardware filters */
674 reg
= nuport_mac_readl((void __iomem
*)_CONFADDR_DBGLED
);
676 nuport_mac_writel(reg
, (void __iomem
*)_CONFADDR_DBGLED
);
678 /* Set LEDs to Link act and RX/TX mode */
679 reg
= nuport_mac_readl((void __iomem
*)(_CONFADDR_SYSDBG
+ 0x04));
681 nuport_mac_writel(reg
, (void __iomem
*)(_CONFADDR_SYSDBG
+ 0x04));
683 ret
= clk_enable(priv
->emac_clk
);
685 netdev_err(dev
, "failed to enable EMAC clock\n");
689 /* Set MAC into full duplex mode by default */
690 nuport_mac_writel(0x1010052C, CTRL_REG
);
692 /* set mac address in hardware in case it was not already */
693 nuport_mac_change_mac_address(dev
, dev
->dev_addr
);
695 ret
= request_irq(priv
->link_irq
, &nuport_mac_link_interrupt
,
698 netdev_err(dev
, "unable to request link interrupt\n");
702 phy_start(priv
->phydev
);
704 /* Enable link interrupt monitoring */
705 spin_lock_irqsave(&priv
->lock
, flags
);
706 nuport_mac_writel(0x1041 | (priv
->phydev
->addr
<< 1), LINK_INT_CSR
);
707 nuport_mac_writel(0xFFFFF, LINK_INT_POLL_TIME
);
708 spin_unlock_irqrestore(&priv
->lock
, flags
);
710 ret
= request_irq(priv
->tx_irq
, &nuport_mac_tx_interrupt
,
713 netdev_err(dev
, "unable to request rx interrupt\n");
717 napi_enable(&priv
->napi
);
719 ret
= request_irq(priv
->rx_irq
, &nuport_mac_rx_interrupt
,
722 netdev_err(dev
, "unable to request tx interrupt\n");
726 /* Enable buffer shifting in RX */
727 tmp
= nuport_mac_readb((void __iomem
*)(_CONFADDR_SYSDBG
+ 0x1D));
729 nuport_mac_writeb(tmp
, (void __iomem
*)(_CONFADDR_SYSDBG
+ 0x1D));
731 netif_start_queue(dev
);
733 nuport_mac_init_tx_ring(priv
);
735 ret
= nuport_mac_init_rx_ring(dev
);
737 netdev_err(dev
, "rx ring init failed\n");
741 nuport_mac_reset_tx_dma(priv
);
742 nuport_mac_reset_rx_dma(priv
);
745 nuport_mac_start_rx_dma(priv
, priv
->rx_skb
[0]);
750 nuport_mac_free_rx_ring(priv
);
751 free_irq(priv
->rx_irq
, dev
);
753 free_irq(priv
->tx_irq
, dev
);
755 free_irq(priv
->link_irq
, dev
);
757 clk_disable(priv
->emac_clk
);
761 static int nuport_mac_close(struct net_device
*dev
)
763 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
765 spin_lock_irq(&priv
->lock
);
766 napi_disable(&priv
->napi
);
767 netif_stop_queue(dev
);
769 free_irq(priv
->link_irq
, dev
);
770 nuport_mac_writel(0x00, LINK_INT_CSR
);
771 nuport_mac_writel(0x00, LINK_INT_POLL_TIME
);
772 phy_stop(priv
->phydev
);
774 free_irq(priv
->tx_irq
, dev
);
775 free_irq(priv
->rx_irq
, dev
);
776 spin_unlock_irq(&priv
->lock
);
778 nuport_mac_free_rx_ring(priv
);
780 clk_disable(priv
->emac_clk
);
785 static int nuport_mac_mii_probe(struct net_device
*dev
)
787 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
788 struct phy_device
*phydev
= NULL
;
791 ret
= clk_enable(priv
->ephy_clk
);
793 netdev_err(dev
, "unable to enable ePHY clk\n");
797 phydev
= phy_find_first(priv
->mii_bus
);
799 netdev_err(dev
, "no PHYs found\n");
804 phydev
= phy_connect(dev
, dev_name(&phydev
->dev
),
805 nuport_mac_adjust_link
, 0,
806 PHY_INTERFACE_MODE_MII
);
807 if (IS_ERR(phydev
)) {
808 netdev_err(dev
, "could not attach PHY\n");
809 ret
= PTR_ERR(phydev
);
813 phydev
->supported
&= PHY_BASIC_FEATURES
;
814 phydev
->advertising
= phydev
->supported
;
815 priv
->phydev
= phydev
;
817 priv
->old_duplex
= -1;
819 dev_info(&priv
->pdev
->dev
, "attached PHY driver [%s] "
820 "(mii_bus:phy_addr=%d)\n",
821 phydev
->drv
->name
, phydev
->addr
);
826 /* disable the Ethernet PHY clock for the moment */
827 clk_disable(priv
->ephy_clk
);
832 static void nuport_mac_ethtool_drvinfo(struct net_device
*dev
,
833 struct ethtool_drvinfo
*info
)
835 strncpy(info
->driver
, "nuport-mac", sizeof(info
->driver
));
836 strncpy(info
->version
, "0.1", sizeof(info
->version
));
837 strncpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
838 strncpy(info
->bus_info
, "internal", sizeof(info
->bus_info
));
840 info
->testinfo_len
= 0;
841 info
->regdump_len
= 0;
842 info
->eedump_len
= 0;
845 static int nuport_mac_ethtool_get_settings(struct net_device
*dev
,
846 struct ethtool_cmd
*cmd
)
848 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
851 return phy_ethtool_gset(priv
->phydev
, cmd
);
856 static int nuport_mac_ethtool_set_settings(struct net_device
*dev
,
857 struct ethtool_cmd
*cmd
)
859 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
862 return phy_ethtool_sset(priv
->phydev
, cmd
);
867 static const struct ethtool_ops nuport_mac_ethtool_ops
= {
868 .get_drvinfo
= nuport_mac_ethtool_drvinfo
,
869 .get_link
= ethtool_op_get_link
,
870 .get_settings
= nuport_mac_ethtool_get_settings
,
871 .set_settings
= nuport_mac_ethtool_set_settings
,
874 static const struct net_device_ops nuport_mac_ops
= {
875 .ndo_open
= nuport_mac_open
,
876 .ndo_stop
= nuport_mac_close
,
877 .ndo_start_xmit
= nuport_mac_start_xmit
,
878 .ndo_change_mtu
= eth_change_mtu
,
879 .ndo_validate_addr
= eth_validate_addr
,
880 .ndo_set_mac_address
= nuport_mac_change_mac_address
,
883 static int __init
nuport_mac_probe(struct platform_device
*pdev
)
885 struct net_device
*dev
;
886 struct nuport_mac_priv
*priv
= NULL
;
887 struct resource
*regs
, *dma
;
889 int rx_irq
, tx_irq
, link_irq
;
892 dev
= alloc_etherdev(sizeof(struct nuport_mac_priv
));
894 dev_err(&pdev
->dev
, "no memory for net_device\n");
898 regs
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
899 dma
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
901 dev_err(&pdev
->dev
, "failed to get regs resources\n");
906 rx_irq
= platform_get_irq(pdev
, 0);
907 tx_irq
= platform_get_irq(pdev
, 1);
908 link_irq
= platform_get_irq(pdev
, 2);
909 if (rx_irq
< 0 || tx_irq
< 0 || link_irq
< 0) {
914 platform_set_drvdata(pdev
, dev
);
915 SET_NETDEV_DEV(dev
, &pdev
->dev
);
916 priv
= netdev_priv(dev
);
919 spin_lock_init(&priv
->lock
);
921 priv
->mac_base
= devm_ioremap(&pdev
->dev
,
922 regs
->start
, resource_size(regs
));
923 if (!priv
->mac_base
) {
924 dev_err(&pdev
->dev
, "failed to remap regs\n");
929 priv
->dma_base
= devm_ioremap(&pdev
->dev
,
930 dma
->start
, resource_size(dma
));
931 if (!priv
->dma_base
) {
932 dev_err(&pdev
->dev
, "failed to remap dma-regs\n");
937 priv
->emac_clk
= clk_get(&pdev
->dev
, "emac");
938 if (IS_ERR_OR_NULL(priv
->emac_clk
)) {
939 dev_err(&pdev
->dev
, "failed to get emac clk\n");
940 ret
= PTR_ERR(priv
->emac_clk
);
944 priv
->ephy_clk
= clk_get(&pdev
->dev
, "ephy");
945 if (IS_ERR_OR_NULL(priv
->ephy_clk
)) {
946 dev_err(&pdev
->dev
, "failed to get ephy clk\n");
947 ret
= PTR_ERR(priv
->ephy_clk
);
951 priv
->link_irq
= link_irq
;
952 priv
->rx_irq
= rx_irq
;
953 priv
->tx_irq
= tx_irq
;
954 dev
->netdev_ops
= &nuport_mac_ops
;
955 dev
->ethtool_ops
= &nuport_mac_ethtool_ops
;
956 dev
->watchdog_timeo
= HZ
;
957 dev
->flags
= IFF_BROADCAST
; /* Supports Broadcast */
959 netif_napi_add(dev
, &priv
->napi
, nuport_mac_poll
, 64);
961 priv
->mii_bus
= mdiobus_alloc();
962 if (!priv
->mii_bus
) {
963 dev_err(&pdev
->dev
, "mii bus allocation failed\n");
967 priv
->mii_bus
->priv
= dev
;
968 priv
->mii_bus
->read
= nuport_mac_mii_read
;
969 priv
->mii_bus
->write
= nuport_mac_mii_write
;
970 priv
->mii_bus
->reset
= nuport_mac_mii_reset
;
971 priv
->mii_bus
->name
= "nuport-mac-mii";
972 priv
->mii_bus
->phy_mask
= (1 << 0);
973 snprintf(priv
->mii_bus
->id
, MII_BUS_ID_SIZE
, "%s", pdev
->name
);
974 priv
->mii_bus
->irq
= kzalloc(PHY_MAX_ADDR
* sizeof(int), GFP_KERNEL
);
975 if (!priv
->mii_bus
->irq
) {
976 dev_err(&pdev
->dev
, "failed to allocate mii_bus irqs\n");
981 /* We support PHY interrupts routed back to the MAC */
982 for (i
= 0; i
< PHY_MAX_ADDR
; i
++)
983 priv
->mii_bus
->irq
[i
] = PHY_IGNORE_INTERRUPT
;
985 ret
= mdiobus_register(priv
->mii_bus
);
987 dev_err(&pdev
->dev
, "failed to register mii_bus\n");
991 ret
= nuport_mac_mii_probe(dev
);
993 dev_err(&pdev
->dev
, "failed to probe MII bus\n");
994 goto out_mdio_unregister
;
997 ret
= register_netdev(dev
);
999 dev_err(&pdev
->dev
, "failed to register net_device\n");
1000 goto out_mdio_probe
;
1003 /* read existing mac address */
1004 nuport_mac_read_mac_address(dev
);
1006 dev_info(&pdev
->dev
, "registered (MAC: %pM)\n", dev
->dev_addr
);
1011 phy_disconnect(priv
->phydev
);
1012 out_mdio_unregister
:
1013 mdiobus_unregister(priv
->mii_bus
);
1015 kfree(priv
->mii_bus
->irq
);
1017 mdiobus_free(priv
->mii_bus
);
1019 platform_set_drvdata(pdev
, NULL
);
1021 clk_put(priv
->ephy_clk
);
1022 clk_put(priv
->emac_clk
);
1024 platform_set_drvdata(pdev
, NULL
);
1028 static int nuport_mac_remove(struct platform_device
*pdev
)
1030 struct net_device
*dev
= platform_get_drvdata(pdev
);
1031 struct nuport_mac_priv
*priv
= netdev_priv(dev
);
1033 unregister_netdev(dev
);
1034 phy_disconnect(priv
->phydev
);
1035 mdiobus_unregister(priv
->mii_bus
);
1036 kfree(priv
->mii_bus
->irq
);
1037 mdiobus_free(priv
->mii_bus
);
1038 clk_put(priv
->ephy_clk
);
1039 clk_put(priv
->emac_clk
);
1042 platform_set_drvdata(pdev
, NULL
);
1047 static struct of_device_id nuport_eth_ids
[] __initdata
= {
1048 {.compatible
= "moschip,nuport-mac",},
1052 static struct platform_driver nuport_eth_driver
= {
1054 .name
= "nuport-mac",
1055 .owner
= THIS_MODULE
,
1056 .of_match_table
= nuport_eth_ids
,
1058 .probe
= nuport_mac_probe
,
1059 .remove
= __devexit_p(nuport_mac_remove
),
1062 module_platform_driver(nuport_eth_driver
);
1064 MODULE_AUTHOR("Moschip Semiconductors Ltd.");
1065 MODULE_DESCRIPTION("Moschip MCS8140 Ethernet MAC driver");
1066 MODULE_LICENSE("GPL");