1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * PXA168 ethernet driver.
4 * Most of the code is derived from mv643xx ethernet driver.
6 * Copyright (C) 2010 Marvell International Ltd.
7 * Sachin Sanap <ssanap@marvell.com>
8 * Zhangfei Gao <zgao6@marvell.com>
9 * Philip Rakity <prakity@marvell.com>
10 * Mark Brown <markb@marvell.com>
13 #include <linux/bitops.h>
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/etherdevice.h>
18 #include <linux/ethtool.h>
20 #include <linux/interrupt.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
26 #include <linux/of_net.h>
27 #include <linux/phy.h>
28 #include <linux/platform_device.h>
29 #include <linux/pxa168_eth.h>
30 #include <linux/tcp.h>
31 #include <linux/types.h>
32 #include <linux/udp.h>
33 #include <linux/workqueue.h>
35 #include <asm/pgtable.h>
36 #include <asm/cacheflush.h>
38 #define DRIVER_NAME "pxa168-eth"
39 #define DRIVER_VERSION "0.3"
45 #define PHY_ADDRESS 0x0000
47 #define PORT_CONFIG 0x0400
48 #define PORT_CONFIG_EXT 0x0408
49 #define PORT_COMMAND 0x0410
50 #define PORT_STATUS 0x0418
52 #define MAC_ADDR_LOW 0x0430
53 #define MAC_ADDR_HIGH 0x0438
54 #define SDMA_CONFIG 0x0440
55 #define SDMA_CMD 0x0448
56 #define INT_CAUSE 0x0450
57 #define INT_W_CLEAR 0x0454
58 #define INT_MASK 0x0458
59 #define ETH_F_RX_DESC_0 0x0480
60 #define ETH_C_RX_DESC_0 0x04A0
61 #define ETH_C_TX_DESC_1 0x04E4
64 #define SMI_BUSY (1 << 28) /* 0 - Write, 1 - Read */
65 #define SMI_R_VALID (1 << 27) /* 0 - Write, 1 - Read */
66 #define SMI_OP_W (0 << 26) /* Write operation */
67 #define SMI_OP_R (1 << 26) /* Read operation */
69 #define PHY_WAIT_ITERATIONS 10
71 #define PXA168_ETH_PHY_ADDR_DEFAULT 0
72 /* RX & TX descriptor command */
73 #define BUF_OWNED_BY_DMA (1 << 31)
75 /* RX descriptor status */
76 #define RX_EN_INT (1 << 23)
77 #define RX_FIRST_DESC (1 << 17)
78 #define RX_LAST_DESC (1 << 16)
79 #define RX_ERROR (1 << 15)
81 /* TX descriptor command */
82 #define TX_EN_INT (1 << 23)
83 #define TX_GEN_CRC (1 << 22)
84 #define TX_ZERO_PADDING (1 << 18)
85 #define TX_FIRST_DESC (1 << 17)
86 #define TX_LAST_DESC (1 << 16)
87 #define TX_ERROR (1 << 15)
90 #define SDMA_CMD_AT (1 << 31)
91 #define SDMA_CMD_TXDL (1 << 24)
92 #define SDMA_CMD_TXDH (1 << 23)
93 #define SDMA_CMD_AR (1 << 15)
94 #define SDMA_CMD_ERD (1 << 7)
96 /* Bit definitions of the Port Config Reg */
97 #define PCR_DUPLEX_FULL (1 << 15)
98 #define PCR_HS (1 << 12)
99 #define PCR_EN (1 << 7)
100 #define PCR_PM (1 << 0)
102 /* Bit definitions of the Port Config Extend Reg */
103 #define PCXR_2BSM (1 << 28)
104 #define PCXR_DSCP_EN (1 << 21)
105 #define PCXR_RMII_EN (1 << 20)
106 #define PCXR_AN_SPEED_DIS (1 << 19)
107 #define PCXR_SPEED_100 (1 << 18)
108 #define PCXR_MFL_1518 (0 << 14)
109 #define PCXR_MFL_1536 (1 << 14)
110 #define PCXR_MFL_2048 (2 << 14)
111 #define PCXR_MFL_64K (3 << 14)
112 #define PCXR_FLOWCTL_DIS (1 << 12)
113 #define PCXR_FLP (1 << 11)
114 #define PCXR_AN_FLOWCTL_DIS (1 << 10)
115 #define PCXR_AN_DUPLEX_DIS (1 << 9)
116 #define PCXR_PRIO_TX_OFF 3
117 #define PCXR_TX_HIGH_PRI (7 << PCXR_PRIO_TX_OFF)
119 /* Bit definitions of the SDMA Config Reg */
120 #define SDCR_BSZ_OFF 12
121 #define SDCR_BSZ8 (3 << SDCR_BSZ_OFF)
122 #define SDCR_BSZ4 (2 << SDCR_BSZ_OFF)
123 #define SDCR_BSZ2 (1 << SDCR_BSZ_OFF)
124 #define SDCR_BSZ1 (0 << SDCR_BSZ_OFF)
125 #define SDCR_BLMR (1 << 6)
126 #define SDCR_BLMT (1 << 7)
127 #define SDCR_RIFB (1 << 9)
128 #define SDCR_RC_OFF 2
129 #define SDCR_RC_MAX_RETRANS (0xf << SDCR_RC_OFF)
132 * Bit definitions of the Interrupt Cause Reg
133 * and Interrupt MASK Reg is the same
135 #define ICR_RXBUF (1 << 0)
136 #define ICR_TXBUF_H (1 << 2)
137 #define ICR_TXBUF_L (1 << 3)
138 #define ICR_TXEND_H (1 << 6)
139 #define ICR_TXEND_L (1 << 7)
140 #define ICR_RXERR (1 << 8)
141 #define ICR_TXERR_H (1 << 10)
142 #define ICR_TXERR_L (1 << 11)
143 #define ICR_TX_UDR (1 << 13)
144 #define ICR_MII_CH (1 << 28)
146 #define ALL_INTS (ICR_TXBUF_H | ICR_TXBUF_L | ICR_TX_UDR |\
147 ICR_TXERR_H | ICR_TXERR_L |\
148 ICR_TXEND_H | ICR_TXEND_L |\
149 ICR_RXBUF | ICR_RXERR | ICR_MII_CH)
151 #define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */
153 #define NUM_RX_DESCS 64
154 #define NUM_TX_DESCS 64
157 #define HASH_DELETE 1
158 #define HASH_ADDR_TABLE_SIZE 0x4000 /* 16K (1/2K address - PCR_HS == 1) */
159 #define HOP_NUMBER 12
161 /* Bit definitions for Port status */
162 #define PORT_SPEED_100 (1 << 0)
163 #define FULL_DUPLEX (1 << 1)
164 #define FLOW_CONTROL_DISABLED (1 << 2)
165 #define LINK_UP (1 << 3)
167 /* Bit definitions for work to be done */
168 #define WORK_TX_DONE (1 << 1)
173 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
176 u32 cmd_sts
; /* Descriptor command status */
177 u16 byte_cnt
; /* Descriptor buffer byte count */
178 u16 buf_size
; /* Buffer size */
179 u32 buf_ptr
; /* Descriptor buffer pointer */
180 u32 next_desc_ptr
; /* Next descriptor pointer */
184 u32 cmd_sts
; /* Command/status field */
186 u16 byte_cnt
; /* buffer byte count */
187 u32 buf_ptr
; /* pointer to buffer for this descriptor */
188 u32 next_desc_ptr
; /* Pointer to next descriptor */
191 struct pxa168_eth_private
{
192 struct platform_device
*pdev
;
193 int port_num
; /* User Ethernet port number */
197 phy_interface_t phy_intf
;
199 int rx_resource_err
; /* Rx ring resource error flag */
201 /* Next available and first returning Rx resource */
202 int rx_curr_desc_q
, rx_used_desc_q
;
204 /* Next available and first returning Tx resource */
205 int tx_curr_desc_q
, tx_used_desc_q
;
207 struct rx_desc
*p_rx_desc_area
;
208 dma_addr_t rx_desc_dma
;
209 int rx_desc_area_size
;
210 struct sk_buff
**rx_skb
;
212 struct tx_desc
*p_tx_desc_area
;
213 dma_addr_t tx_desc_dma
;
214 int tx_desc_area_size
;
215 struct sk_buff
**tx_skb
;
217 struct work_struct tx_timeout_task
;
219 struct net_device
*dev
;
220 struct napi_struct napi
;
224 /* Size of Tx Ring per queue */
226 /* Number of tx descriptors in use */
228 /* Size of Rx Ring per queue */
230 /* Number of rx descriptors in use */
234 * Used in case RX Ring is empty, which can occur when
235 * system does not have resources (skb's)
237 struct timer_list timeout
;
238 struct mii_bus
*smi_bus
;
242 struct pxa168_eth_platform_data
*pd
;
244 * Ethernet controller base address.
248 /* Pointer to the hardware address filter table */
253 struct addr_table_entry
{
258 /* Bit fields of a Hash Table Entry */
259 enum hash_table_entry
{
260 HASH_ENTRY_VALID
= 1,
262 HASH_ENTRY_RECEIVE_DISCARD
= 4,
263 HASH_ENTRY_RECEIVE_DISCARD_BIT
= 2
266 static int pxa168_init_hw(struct pxa168_eth_private
*pep
);
267 static int pxa168_init_phy(struct net_device
*dev
);
268 static void eth_port_reset(struct net_device
*dev
);
269 static void eth_port_start(struct net_device
*dev
);
270 static int pxa168_eth_open(struct net_device
*dev
);
271 static int pxa168_eth_stop(struct net_device
*dev
);
273 static inline u32
rdl(struct pxa168_eth_private
*pep
, int offset
)
275 return readl_relaxed(pep
->base
+ offset
);
278 static inline void wrl(struct pxa168_eth_private
*pep
, int offset
, u32 data
)
280 writel_relaxed(data
, pep
->base
+ offset
);
283 static void abort_dma(struct pxa168_eth_private
*pep
)
286 int max_retries
= 40;
289 wrl(pep
, SDMA_CMD
, SDMA_CMD_AR
| SDMA_CMD_AT
);
293 while ((rdl(pep
, SDMA_CMD
) & (SDMA_CMD_AR
| SDMA_CMD_AT
))
297 } while (max_retries
-- > 0 && delay
<= 0);
299 if (max_retries
<= 0)
300 netdev_err(pep
->dev
, "%s : DMA Stuck\n", __func__
);
303 static void rxq_refill(struct net_device
*dev
)
305 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
307 struct rx_desc
*p_used_rx_desc
;
310 while (pep
->rx_desc_count
< pep
->rx_ring_size
) {
313 skb
= netdev_alloc_skb(dev
, pep
->skb_size
);
317 skb_reserve(skb
, SKB_DMA_REALIGN
);
318 pep
->rx_desc_count
++;
319 /* Get 'used' Rx descriptor */
320 used_rx_desc
= pep
->rx_used_desc_q
;
321 p_used_rx_desc
= &pep
->p_rx_desc_area
[used_rx_desc
];
322 size
= skb_end_pointer(skb
) - skb
->data
;
323 p_used_rx_desc
->buf_ptr
= dma_map_single(&pep
->pdev
->dev
,
327 p_used_rx_desc
->buf_size
= size
;
328 pep
->rx_skb
[used_rx_desc
] = skb
;
330 /* Return the descriptor to DMA ownership */
332 p_used_rx_desc
->cmd_sts
= BUF_OWNED_BY_DMA
| RX_EN_INT
;
335 /* Move the used descriptor pointer to the next descriptor */
336 pep
->rx_used_desc_q
= (used_rx_desc
+ 1) % pep
->rx_ring_size
;
338 /* Any Rx return cancels the Rx resource error status */
339 pep
->rx_resource_err
= 0;
341 skb_reserve(skb
, ETH_HW_IP_ALIGN
);
345 * If RX ring is empty of SKB, set a timer to try allocating
346 * again at a later time.
348 if (pep
->rx_desc_count
== 0) {
349 pep
->timeout
.expires
= jiffies
+ (HZ
/ 10);
350 add_timer(&pep
->timeout
);
354 static inline void rxq_refill_timer_wrapper(struct timer_list
*t
)
356 struct pxa168_eth_private
*pep
= from_timer(pep
, t
, timeout
);
357 napi_schedule(&pep
->napi
);
360 static inline u8
flip_8_bits(u8 x
)
362 return (((x
) & 0x01) << 3) | (((x
) & 0x02) << 1)
363 | (((x
) & 0x04) >> 1) | (((x
) & 0x08) >> 3)
364 | (((x
) & 0x10) << 3) | (((x
) & 0x20) << 1)
365 | (((x
) & 0x40) >> 1) | (((x
) & 0x80) >> 3);
368 static void nibble_swap_every_byte(unsigned char *mac_addr
)
371 for (i
= 0; i
< ETH_ALEN
; i
++) {
372 mac_addr
[i
] = ((mac_addr
[i
] & 0x0f) << 4) |
373 ((mac_addr
[i
] & 0xf0) >> 4);
377 static void inverse_every_nibble(unsigned char *mac_addr
)
380 for (i
= 0; i
< ETH_ALEN
; i
++)
381 mac_addr
[i
] = flip_8_bits(mac_addr
[i
]);
385 * ----------------------------------------------------------------------------
386 * This function will calculate the hash function of the address.
388 * mac_addr_orig - MAC address.
390 * return the calculated entry.
392 static u32
hash_function(unsigned char *mac_addr_orig
)
399 unsigned char mac_addr
[ETH_ALEN
];
401 /* Make a copy of MAC address since we are going to performe bit
404 memcpy(mac_addr
, mac_addr_orig
, ETH_ALEN
);
406 nibble_swap_every_byte(mac_addr
);
407 inverse_every_nibble(mac_addr
);
409 addr0
= (mac_addr
[5] >> 2) & 0x3f;
410 addr1
= (mac_addr
[5] & 0x03) | (((mac_addr
[4] & 0x7f)) << 2);
411 addr2
= ((mac_addr
[4] & 0x80) >> 7) | mac_addr
[3] << 1;
412 addr3
= (mac_addr
[2] & 0xff) | ((mac_addr
[1] & 1) << 8);
414 hash_result
= (addr0
<< 9) | (addr1
^ addr2
^ addr3
);
415 hash_result
= hash_result
& 0x07ff;
420 * ----------------------------------------------------------------------------
421 * This function will add/del an entry to the address table.
424 * mac_addr - MAC address.
425 * skip - if 1, skip this address.Used in case of deleting an entry which is a
426 * part of chain in the hash table.We can't just delete the entry since
427 * that will break the chain.We need to defragment the tables time to
429 * rd - 0 Discard packet upon match.
430 * - 1 Receive packet upon match.
432 * address table entry is added/deleted.
434 * -ENOSPC if table full
436 static int add_del_hash_entry(struct pxa168_eth_private
*pep
,
437 unsigned char *mac_addr
,
438 u32 rd
, u32 skip
, int del
)
440 struct addr_table_entry
*entry
, *start
;
445 new_low
= (((mac_addr
[1] >> 4) & 0xf) << 15)
446 | (((mac_addr
[1] >> 0) & 0xf) << 11)
447 | (((mac_addr
[0] >> 4) & 0xf) << 7)
448 | (((mac_addr
[0] >> 0) & 0xf) << 3)
449 | (((mac_addr
[3] >> 4) & 0x1) << 31)
450 | (((mac_addr
[3] >> 0) & 0xf) << 27)
451 | (((mac_addr
[2] >> 4) & 0xf) << 23)
452 | (((mac_addr
[2] >> 0) & 0xf) << 19)
453 | (skip
<< SKIP
) | (rd
<< HASH_ENTRY_RECEIVE_DISCARD_BIT
)
456 new_high
= (((mac_addr
[5] >> 4) & 0xf) << 15)
457 | (((mac_addr
[5] >> 0) & 0xf) << 11)
458 | (((mac_addr
[4] >> 4) & 0xf) << 7)
459 | (((mac_addr
[4] >> 0) & 0xf) << 3)
460 | (((mac_addr
[3] >> 5) & 0x7) << 0);
463 * Pick the appropriate table, start scanning for free/reusable
464 * entries at the index obtained by hashing the specified MAC address
467 entry
= start
+ hash_function(mac_addr
);
468 for (i
= 0; i
< HOP_NUMBER
; i
++) {
469 if (!(le32_to_cpu(entry
->lo
) & HASH_ENTRY_VALID
)) {
472 /* if same address put in same position */
473 if (((le32_to_cpu(entry
->lo
) & 0xfffffff8) ==
474 (new_low
& 0xfffffff8)) &&
475 (le32_to_cpu(entry
->hi
) == new_high
)) {
479 if (entry
== start
+ 0x7ff)
485 if (((le32_to_cpu(entry
->lo
) & 0xfffffff8) != (new_low
& 0xfffffff8)) &&
486 (le32_to_cpu(entry
->hi
) != new_high
) && del
)
489 if (i
== HOP_NUMBER
) {
491 netdev_info(pep
->dev
,
492 "%s: table section is full, need to "
493 "move to 16kB implementation?\n",
501 * Update the selected entry
507 entry
->hi
= cpu_to_le32(new_high
);
508 entry
->lo
= cpu_to_le32(new_low
);
515 * ----------------------------------------------------------------------------
516 * Create an addressTable entry from MAC address info
517 * found in the specifed net_device struct
519 * Input : pointer to ethernet interface network device structure
522 static void update_hash_table_mac_address(struct pxa168_eth_private
*pep
,
523 unsigned char *oaddr
,
526 /* Delete old entry */
528 add_del_hash_entry(pep
, oaddr
, 1, 0, HASH_DELETE
);
530 add_del_hash_entry(pep
, addr
, 1, 0, HASH_ADD
);
533 static int init_hash_table(struct pxa168_eth_private
*pep
)
536 * Hardware expects CPU to build a hash table based on a predefined
537 * hash function and populate it based on hardware address. The
538 * location of the hash table is identified by 32-bit pointer stored
539 * in HTPR internal register. Two possible sizes exists for the hash
540 * table 8kB (256kB of DRAM required (4 x 64 kB banks)) and 1/2kB
541 * (16kB of DRAM required (4 x 4 kB banks)).We currently only support
544 /* TODO: Add support for 8kB hash table and alternative hash
545 * function.Driver can dynamically switch to them if the 1/2kB hash
549 pep
->htpr
= dma_alloc_coherent(pep
->dev
->dev
.parent
,
550 HASH_ADDR_TABLE_SIZE
,
551 &pep
->htpr_dma
, GFP_KERNEL
);
555 memset(pep
->htpr
, 0, HASH_ADDR_TABLE_SIZE
);
557 wrl(pep
, HTPR
, pep
->htpr_dma
);
561 static void pxa168_eth_set_rx_mode(struct net_device
*dev
)
563 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
564 struct netdev_hw_addr
*ha
;
567 val
= rdl(pep
, PORT_CONFIG
);
568 if (dev
->flags
& IFF_PROMISC
)
572 wrl(pep
, PORT_CONFIG
, val
);
575 * Remove the old list of MAC address and add dev->addr
576 * and multicast address.
578 memset(pep
->htpr
, 0, HASH_ADDR_TABLE_SIZE
);
579 update_hash_table_mac_address(pep
, NULL
, dev
->dev_addr
);
581 netdev_for_each_mc_addr(ha
, dev
)
582 update_hash_table_mac_address(pep
, NULL
, ha
->addr
);
585 static void pxa168_eth_get_mac_address(struct net_device
*dev
,
588 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
589 unsigned int mac_h
= rdl(pep
, MAC_ADDR_HIGH
);
590 unsigned int mac_l
= rdl(pep
, MAC_ADDR_LOW
);
592 addr
[0] = (mac_h
>> 24) & 0xff;
593 addr
[1] = (mac_h
>> 16) & 0xff;
594 addr
[2] = (mac_h
>> 8) & 0xff;
595 addr
[3] = mac_h
& 0xff;
596 addr
[4] = (mac_l
>> 8) & 0xff;
597 addr
[5] = mac_l
& 0xff;
600 static int pxa168_eth_set_mac_address(struct net_device
*dev
, void *addr
)
602 struct sockaddr
*sa
= addr
;
603 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
604 unsigned char oldMac
[ETH_ALEN
];
607 if (!is_valid_ether_addr(sa
->sa_data
))
608 return -EADDRNOTAVAIL
;
609 memcpy(oldMac
, dev
->dev_addr
, ETH_ALEN
);
610 memcpy(dev
->dev_addr
, sa
->sa_data
, ETH_ALEN
);
612 mac_h
= dev
->dev_addr
[0] << 24;
613 mac_h
|= dev
->dev_addr
[1] << 16;
614 mac_h
|= dev
->dev_addr
[2] << 8;
615 mac_h
|= dev
->dev_addr
[3];
616 mac_l
= dev
->dev_addr
[4] << 8;
617 mac_l
|= dev
->dev_addr
[5];
618 wrl(pep
, MAC_ADDR_HIGH
, mac_h
);
619 wrl(pep
, MAC_ADDR_LOW
, mac_l
);
621 netif_addr_lock_bh(dev
);
622 update_hash_table_mac_address(pep
, oldMac
, dev
->dev_addr
);
623 netif_addr_unlock_bh(dev
);
627 static void eth_port_start(struct net_device
*dev
)
629 unsigned int val
= 0;
630 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
631 int tx_curr_desc
, rx_curr_desc
;
633 phy_start(dev
->phydev
);
635 /* Assignment of Tx CTRP of given queue */
636 tx_curr_desc
= pep
->tx_curr_desc_q
;
637 wrl(pep
, ETH_C_TX_DESC_1
,
638 (u32
) (pep
->tx_desc_dma
+ tx_curr_desc
* sizeof(struct tx_desc
)));
640 /* Assignment of Rx CRDP of given queue */
641 rx_curr_desc
= pep
->rx_curr_desc_q
;
642 wrl(pep
, ETH_C_RX_DESC_0
,
643 (u32
) (pep
->rx_desc_dma
+ rx_curr_desc
* sizeof(struct rx_desc
)));
645 wrl(pep
, ETH_F_RX_DESC_0
,
646 (u32
) (pep
->rx_desc_dma
+ rx_curr_desc
* sizeof(struct rx_desc
)));
648 /* Clear all interrupts */
649 wrl(pep
, INT_CAUSE
, 0);
651 /* Enable all interrupts for receive, transmit and error. */
652 wrl(pep
, INT_MASK
, ALL_INTS
);
654 val
= rdl(pep
, PORT_CONFIG
);
656 wrl(pep
, PORT_CONFIG
, val
);
658 /* Start RX DMA engine */
659 val
= rdl(pep
, SDMA_CMD
);
661 wrl(pep
, SDMA_CMD
, val
);
664 static void eth_port_reset(struct net_device
*dev
)
666 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
667 unsigned int val
= 0;
669 /* Stop all interrupts for receive, transmit and error. */
670 wrl(pep
, INT_MASK
, 0);
672 /* Clear all interrupts */
673 wrl(pep
, INT_CAUSE
, 0);
676 val
= rdl(pep
, SDMA_CMD
);
677 val
&= ~SDMA_CMD_ERD
; /* abort dma command */
679 /* Abort any transmit and receive operations and put DMA
685 val
= rdl(pep
, PORT_CONFIG
);
687 wrl(pep
, PORT_CONFIG
, val
);
689 phy_stop(dev
->phydev
);
693 * txq_reclaim - Free the tx desc data for completed descriptors
694 * If force is non-zero, frees uncompleted descriptors as well
696 static int txq_reclaim(struct net_device
*dev
, int force
)
698 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
699 struct tx_desc
*desc
;
709 pep
->work_todo
&= ~WORK_TX_DONE
;
710 while (pep
->tx_desc_count
> 0) {
711 tx_index
= pep
->tx_used_desc_q
;
712 desc
= &pep
->p_tx_desc_area
[tx_index
];
713 cmd_sts
= desc
->cmd_sts
;
714 if (!force
&& (cmd_sts
& BUF_OWNED_BY_DMA
)) {
716 goto txq_reclaim_end
;
719 goto txq_reclaim_end
;
722 pep
->tx_used_desc_q
= (tx_index
+ 1) % pep
->tx_ring_size
;
723 pep
->tx_desc_count
--;
724 addr
= desc
->buf_ptr
;
725 count
= desc
->byte_cnt
;
726 skb
= pep
->tx_skb
[tx_index
];
728 pep
->tx_skb
[tx_index
] = NULL
;
730 if (cmd_sts
& TX_ERROR
) {
732 netdev_err(dev
, "Error in TX\n");
733 dev
->stats
.tx_errors
++;
735 dma_unmap_single(&pep
->pdev
->dev
, addr
, count
, DMA_TO_DEVICE
);
737 dev_kfree_skb_irq(skb
);
741 netif_tx_unlock(dev
);
745 static void pxa168_eth_tx_timeout(struct net_device
*dev
)
747 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
749 netdev_info(dev
, "TX timeout desc_count %d\n", pep
->tx_desc_count
);
751 schedule_work(&pep
->tx_timeout_task
);
754 static void pxa168_eth_tx_timeout_task(struct work_struct
*work
)
756 struct pxa168_eth_private
*pep
= container_of(work
,
757 struct pxa168_eth_private
,
759 struct net_device
*dev
= pep
->dev
;
760 pxa168_eth_stop(dev
);
761 pxa168_eth_open(dev
);
764 static int rxq_process(struct net_device
*dev
, int budget
)
766 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
767 struct net_device_stats
*stats
= &dev
->stats
;
768 unsigned int received_packets
= 0;
771 while (budget
-- > 0) {
772 int rx_next_curr_desc
, rx_curr_desc
, rx_used_desc
;
773 struct rx_desc
*rx_desc
;
774 unsigned int cmd_sts
;
776 /* Do not process Rx ring in case of Rx ring resource error */
777 if (pep
->rx_resource_err
)
779 rx_curr_desc
= pep
->rx_curr_desc_q
;
780 rx_used_desc
= pep
->rx_used_desc_q
;
781 rx_desc
= &pep
->p_rx_desc_area
[rx_curr_desc
];
782 cmd_sts
= rx_desc
->cmd_sts
;
784 if (cmd_sts
& (BUF_OWNED_BY_DMA
))
786 skb
= pep
->rx_skb
[rx_curr_desc
];
787 pep
->rx_skb
[rx_curr_desc
] = NULL
;
789 rx_next_curr_desc
= (rx_curr_desc
+ 1) % pep
->rx_ring_size
;
790 pep
->rx_curr_desc_q
= rx_next_curr_desc
;
792 /* Rx descriptors exhausted. */
793 /* Set the Rx ring resource error flag */
794 if (rx_next_curr_desc
== rx_used_desc
)
795 pep
->rx_resource_err
= 1;
796 pep
->rx_desc_count
--;
797 dma_unmap_single(&pep
->pdev
->dev
, rx_desc
->buf_ptr
,
803 * Note byte count includes 4 byte CRC count
806 stats
->rx_bytes
+= rx_desc
->byte_cnt
;
808 * In case received a packet without first / last bits on OR
809 * the error summary bit is on, the packets needs to be droped.
811 if (((cmd_sts
& (RX_FIRST_DESC
| RX_LAST_DESC
)) !=
812 (RX_FIRST_DESC
| RX_LAST_DESC
))
813 || (cmd_sts
& RX_ERROR
)) {
816 if ((cmd_sts
& (RX_FIRST_DESC
| RX_LAST_DESC
)) !=
817 (RX_FIRST_DESC
| RX_LAST_DESC
)) {
820 "Rx pkt on multiple desc\n");
822 if (cmd_sts
& RX_ERROR
)
824 dev_kfree_skb_irq(skb
);
827 * The -4 is for the CRC in the trailer of the
830 skb_put(skb
, rx_desc
->byte_cnt
- 4);
831 skb
->protocol
= eth_type_trans(skb
, dev
);
832 netif_receive_skb(skb
);
835 /* Fill RX ring with skb's */
837 return received_packets
;
840 static int pxa168_eth_collect_events(struct pxa168_eth_private
*pep
,
841 struct net_device
*dev
)
846 icr
= rdl(pep
, INT_CAUSE
);
850 wrl(pep
, INT_CAUSE
, ~icr
);
851 if (icr
& (ICR_TXBUF_H
| ICR_TXBUF_L
)) {
852 pep
->work_todo
|= WORK_TX_DONE
;
860 static irqreturn_t
pxa168_eth_int_handler(int irq
, void *dev_id
)
862 struct net_device
*dev
= (struct net_device
*)dev_id
;
863 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
865 if (unlikely(!pxa168_eth_collect_events(pep
, dev
)))
867 /* Disable interrupts */
868 wrl(pep
, INT_MASK
, 0);
869 napi_schedule(&pep
->napi
);
873 static void pxa168_eth_recalc_skb_size(struct pxa168_eth_private
*pep
)
878 * Reserve 2+14 bytes for an ethernet header (the hardware
879 * automatically prepends 2 bytes of dummy data to each
880 * received packet), 16 bytes for up to four VLAN tags, and
881 * 4 bytes for the trailing FCS -- 36 bytes total.
883 skb_size
= pep
->dev
->mtu
+ 36;
886 * Make sure that the skb size is a multiple of 8 bytes, as
887 * the lower three bits of the receive descriptor's buffer
888 * size field are ignored by the hardware.
890 pep
->skb_size
= (skb_size
+ 7) & ~7;
893 * If NET_SKB_PAD is smaller than a cache line,
894 * netdev_alloc_skb() will cause skb->data to be misaligned
895 * to a cache line boundary. If this is the case, include
896 * some extra space to allow re-aligning the data area.
898 pep
->skb_size
+= SKB_DMA_REALIGN
;
902 static int set_port_config_ext(struct pxa168_eth_private
*pep
)
906 pxa168_eth_recalc_skb_size(pep
);
907 if (pep
->skb_size
<= 1518)
908 skb_size
= PCXR_MFL_1518
;
909 else if (pep
->skb_size
<= 1536)
910 skb_size
= PCXR_MFL_1536
;
911 else if (pep
->skb_size
<= 2048)
912 skb_size
= PCXR_MFL_2048
;
914 skb_size
= PCXR_MFL_64K
;
916 /* Extended Port Configuration */
917 wrl(pep
, PORT_CONFIG_EXT
,
918 PCXR_AN_SPEED_DIS
| /* Disable HW AN */
920 PCXR_AN_FLOWCTL_DIS
|
921 PCXR_2BSM
| /* Two byte prefix aligns IP hdr */
922 PCXR_DSCP_EN
| /* Enable DSCP in IP */
923 skb_size
| PCXR_FLP
| /* do not force link pass */
924 PCXR_TX_HIGH_PRI
); /* Transmit - high priority queue */
929 static void pxa168_eth_adjust_link(struct net_device
*dev
)
931 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
932 struct phy_device
*phy
= dev
->phydev
;
933 u32 cfg
, cfg_o
= rdl(pep
, PORT_CONFIG
);
934 u32 cfgext
, cfgext_o
= rdl(pep
, PORT_CONFIG_EXT
);
936 cfg
= cfg_o
& ~PCR_DUPLEX_FULL
;
937 cfgext
= cfgext_o
& ~(PCXR_SPEED_100
| PCXR_FLOWCTL_DIS
| PCXR_RMII_EN
);
939 if (phy
->interface
== PHY_INTERFACE_MODE_RMII
)
940 cfgext
|= PCXR_RMII_EN
;
941 if (phy
->speed
== SPEED_100
)
942 cfgext
|= PCXR_SPEED_100
;
944 cfg
|= PCR_DUPLEX_FULL
;
946 cfgext
|= PCXR_FLOWCTL_DIS
;
948 /* Bail out if there has nothing changed */
949 if (cfg
== cfg_o
&& cfgext
== cfgext_o
)
952 wrl(pep
, PORT_CONFIG
, cfg
);
953 wrl(pep
, PORT_CONFIG_EXT
, cfgext
);
955 phy_print_status(phy
);
958 static int pxa168_init_phy(struct net_device
*dev
)
960 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
961 struct ethtool_link_ksettings cmd
;
962 struct phy_device
*phy
= NULL
;
968 phy
= mdiobus_scan(pep
->smi_bus
, pep
->phy_addr
);
972 err
= phy_connect_direct(dev
, phy
, pxa168_eth_adjust_link
,
977 cmd
.base
.phy_address
= pep
->phy_addr
;
978 cmd
.base
.speed
= pep
->phy_speed
;
979 cmd
.base
.duplex
= pep
->phy_duplex
;
980 bitmap_copy(cmd
.link_modes
.advertising
, PHY_BASIC_FEATURES
,
981 __ETHTOOL_LINK_MODE_MASK_NBITS
);
982 cmd
.base
.autoneg
= AUTONEG_ENABLE
;
984 if (cmd
.base
.speed
!= 0)
985 cmd
.base
.autoneg
= AUTONEG_DISABLE
;
987 return phy_ethtool_set_link_ksettings(dev
, &cmd
);
990 static int pxa168_init_hw(struct pxa168_eth_private
*pep
)
994 /* Disable interrupts */
995 wrl(pep
, INT_MASK
, 0);
996 wrl(pep
, INT_CAUSE
, 0);
997 /* Write to ICR to clear interrupts. */
998 wrl(pep
, INT_W_CLEAR
, 0);
999 /* Abort any transmit and receive operations and put DMA
1003 /* Initialize address hash table */
1004 err
= init_hash_table(pep
);
1007 /* SDMA configuration */
1008 wrl(pep
, SDMA_CONFIG
, SDCR_BSZ8
| /* Burst size = 32 bytes */
1009 SDCR_RIFB
| /* Rx interrupt on frame */
1010 SDCR_BLMT
| /* Little endian transmit */
1011 SDCR_BLMR
| /* Little endian receive */
1012 SDCR_RC_MAX_RETRANS
); /* Max retransmit count */
1013 /* Port Configuration */
1014 wrl(pep
, PORT_CONFIG
, PCR_HS
); /* Hash size is 1/2kb */
1015 set_port_config_ext(pep
);
1020 static int rxq_init(struct net_device
*dev
)
1022 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1023 struct rx_desc
*p_rx_desc
;
1024 int size
= 0, i
= 0;
1025 int rx_desc_num
= pep
->rx_ring_size
;
1027 /* Allocate RX skb rings */
1028 pep
->rx_skb
= kcalloc(rx_desc_num
, sizeof(*pep
->rx_skb
), GFP_KERNEL
);
1032 /* Allocate RX ring */
1033 pep
->rx_desc_count
= 0;
1034 size
= pep
->rx_ring_size
* sizeof(struct rx_desc
);
1035 pep
->rx_desc_area_size
= size
;
1036 pep
->p_rx_desc_area
= dma_alloc_coherent(pep
->dev
->dev
.parent
, size
,
1039 if (!pep
->p_rx_desc_area
)
1042 /* initialize the next_desc_ptr links in the Rx descriptors ring */
1043 p_rx_desc
= pep
->p_rx_desc_area
;
1044 for (i
= 0; i
< rx_desc_num
; i
++) {
1045 p_rx_desc
[i
].next_desc_ptr
= pep
->rx_desc_dma
+
1046 ((i
+ 1) % rx_desc_num
) * sizeof(struct rx_desc
);
1048 /* Save Rx desc pointer to driver struct. */
1049 pep
->rx_curr_desc_q
= 0;
1050 pep
->rx_used_desc_q
= 0;
1051 pep
->rx_desc_area_size
= rx_desc_num
* sizeof(struct rx_desc
);
1058 static void rxq_deinit(struct net_device
*dev
)
1060 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1063 /* Free preallocated skb's on RX rings */
1064 for (curr
= 0; pep
->rx_desc_count
&& curr
< pep
->rx_ring_size
; curr
++) {
1065 if (pep
->rx_skb
[curr
]) {
1066 dev_kfree_skb(pep
->rx_skb
[curr
]);
1067 pep
->rx_desc_count
--;
1070 if (pep
->rx_desc_count
)
1071 netdev_err(dev
, "Error in freeing Rx Ring. %d skb's still\n",
1072 pep
->rx_desc_count
);
1074 if (pep
->p_rx_desc_area
)
1075 dma_free_coherent(pep
->dev
->dev
.parent
, pep
->rx_desc_area_size
,
1076 pep
->p_rx_desc_area
, pep
->rx_desc_dma
);
1080 static int txq_init(struct net_device
*dev
)
1082 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1083 struct tx_desc
*p_tx_desc
;
1084 int size
= 0, i
= 0;
1085 int tx_desc_num
= pep
->tx_ring_size
;
1087 pep
->tx_skb
= kcalloc(tx_desc_num
, sizeof(*pep
->tx_skb
), GFP_KERNEL
);
1091 /* Allocate TX ring */
1092 pep
->tx_desc_count
= 0;
1093 size
= pep
->tx_ring_size
* sizeof(struct tx_desc
);
1094 pep
->tx_desc_area_size
= size
;
1095 pep
->p_tx_desc_area
= dma_alloc_coherent(pep
->dev
->dev
.parent
, size
,
1098 if (!pep
->p_tx_desc_area
)
1100 /* Initialize the next_desc_ptr links in the Tx descriptors ring */
1101 p_tx_desc
= pep
->p_tx_desc_area
;
1102 for (i
= 0; i
< tx_desc_num
; i
++) {
1103 p_tx_desc
[i
].next_desc_ptr
= pep
->tx_desc_dma
+
1104 ((i
+ 1) % tx_desc_num
) * sizeof(struct tx_desc
);
1106 pep
->tx_curr_desc_q
= 0;
1107 pep
->tx_used_desc_q
= 0;
1108 pep
->tx_desc_area_size
= tx_desc_num
* sizeof(struct tx_desc
);
1115 static void txq_deinit(struct net_device
*dev
)
1117 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1119 /* Free outstanding skb's on TX ring */
1120 txq_reclaim(dev
, 1);
1121 BUG_ON(pep
->tx_used_desc_q
!= pep
->tx_curr_desc_q
);
1123 if (pep
->p_tx_desc_area
)
1124 dma_free_coherent(pep
->dev
->dev
.parent
, pep
->tx_desc_area_size
,
1125 pep
->p_tx_desc_area
, pep
->tx_desc_dma
);
1129 static int pxa168_eth_open(struct net_device
*dev
)
1131 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1134 err
= pxa168_init_phy(dev
);
1138 err
= request_irq(dev
->irq
, pxa168_eth_int_handler
, 0, dev
->name
, dev
);
1140 dev_err(&dev
->dev
, "can't assign irq\n");
1143 pep
->rx_resource_err
= 0;
1144 err
= rxq_init(dev
);
1147 err
= txq_init(dev
);
1149 goto out_free_rx_skb
;
1150 pep
->rx_used_desc_q
= 0;
1151 pep
->rx_curr_desc_q
= 0;
1153 /* Fill RX ring with skb's */
1155 pep
->rx_used_desc_q
= 0;
1156 pep
->rx_curr_desc_q
= 0;
1157 netif_carrier_off(dev
);
1158 napi_enable(&pep
->napi
);
1159 eth_port_start(dev
);
1164 free_irq(dev
->irq
, dev
);
1168 static int pxa168_eth_stop(struct net_device
*dev
)
1170 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1171 eth_port_reset(dev
);
1173 /* Disable interrupts */
1174 wrl(pep
, INT_MASK
, 0);
1175 wrl(pep
, INT_CAUSE
, 0);
1176 /* Write to ICR to clear interrupts. */
1177 wrl(pep
, INT_W_CLEAR
, 0);
1178 napi_disable(&pep
->napi
);
1179 del_timer_sync(&pep
->timeout
);
1180 netif_carrier_off(dev
);
1181 free_irq(dev
->irq
, dev
);
1188 static int pxa168_eth_change_mtu(struct net_device
*dev
, int mtu
)
1191 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1194 retval
= set_port_config_ext(pep
);
1196 if (!netif_running(dev
))
1200 * Stop and then re-open the interface. This will allocate RX
1201 * skbs of the new MTU.
1202 * There is a possible danger that the open will not succeed,
1203 * due to memory being full.
1205 pxa168_eth_stop(dev
);
1206 if (pxa168_eth_open(dev
)) {
1208 "fatal error on re-opening device after MTU change\n");
1214 static int eth_alloc_tx_desc_index(struct pxa168_eth_private
*pep
)
1218 tx_desc_curr
= pep
->tx_curr_desc_q
;
1219 pep
->tx_curr_desc_q
= (tx_desc_curr
+ 1) % pep
->tx_ring_size
;
1220 BUG_ON(pep
->tx_curr_desc_q
== pep
->tx_used_desc_q
);
1221 pep
->tx_desc_count
++;
1223 return tx_desc_curr
;
1226 static int pxa168_rx_poll(struct napi_struct
*napi
, int budget
)
1228 struct pxa168_eth_private
*pep
=
1229 container_of(napi
, struct pxa168_eth_private
, napi
);
1230 struct net_device
*dev
= pep
->dev
;
1234 * We call txq_reclaim every time since in NAPI interupts are disabled
1235 * and due to this we miss the TX_DONE interrupt,which is not updated in
1236 * interrupt status register.
1238 txq_reclaim(dev
, 0);
1239 if (netif_queue_stopped(dev
)
1240 && pep
->tx_ring_size
- pep
->tx_desc_count
> 1) {
1241 netif_wake_queue(dev
);
1243 work_done
= rxq_process(dev
, budget
);
1244 if (work_done
< budget
) {
1245 napi_complete_done(napi
, work_done
);
1246 wrl(pep
, INT_MASK
, ALL_INTS
);
1253 pxa168_eth_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1255 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1256 struct net_device_stats
*stats
= &dev
->stats
;
1257 struct tx_desc
*desc
;
1261 tx_index
= eth_alloc_tx_desc_index(pep
);
1262 desc
= &pep
->p_tx_desc_area
[tx_index
];
1264 pep
->tx_skb
[tx_index
] = skb
;
1265 desc
->byte_cnt
= length
;
1266 desc
->buf_ptr
= dma_map_single(&pep
->pdev
->dev
, skb
->data
, length
,
1269 skb_tx_timestamp(skb
);
1272 desc
->cmd_sts
= BUF_OWNED_BY_DMA
| TX_GEN_CRC
| TX_FIRST_DESC
|
1273 TX_ZERO_PADDING
| TX_LAST_DESC
| TX_EN_INT
;
1275 wrl(pep
, SDMA_CMD
, SDMA_CMD_TXDH
| SDMA_CMD_ERD
);
1277 stats
->tx_bytes
+= length
;
1278 stats
->tx_packets
++;
1279 netif_trans_update(dev
);
1280 if (pep
->tx_ring_size
- pep
->tx_desc_count
<= 1) {
1281 /* We handled the current skb, but now we are out of space.*/
1282 netif_stop_queue(dev
);
1285 return NETDEV_TX_OK
;
1288 static int smi_wait_ready(struct pxa168_eth_private
*pep
)
1292 /* wait for the SMI register to become available */
1293 for (i
= 0; rdl(pep
, SMI
) & SMI_BUSY
; i
++) {
1294 if (i
== PHY_WAIT_ITERATIONS
)
1302 static int pxa168_smi_read(struct mii_bus
*bus
, int phy_addr
, int regnum
)
1304 struct pxa168_eth_private
*pep
= bus
->priv
;
1308 if (smi_wait_ready(pep
)) {
1309 netdev_warn(pep
->dev
, "pxa168_eth: SMI bus busy timeout\n");
1312 wrl(pep
, SMI
, (phy_addr
<< 16) | (regnum
<< 21) | SMI_OP_R
);
1313 /* now wait for the data to be valid */
1314 for (i
= 0; !((val
= rdl(pep
, SMI
)) & SMI_R_VALID
); i
++) {
1315 if (i
== PHY_WAIT_ITERATIONS
) {
1316 netdev_warn(pep
->dev
,
1317 "pxa168_eth: SMI bus read not valid\n");
1323 return val
& 0xffff;
1326 static int pxa168_smi_write(struct mii_bus
*bus
, int phy_addr
, int regnum
,
1329 struct pxa168_eth_private
*pep
= bus
->priv
;
1331 if (smi_wait_ready(pep
)) {
1332 netdev_warn(pep
->dev
, "pxa168_eth: SMI bus busy timeout\n");
1336 wrl(pep
, SMI
, (phy_addr
<< 16) | (regnum
<< 21) |
1337 SMI_OP_W
| (value
& 0xffff));
1339 if (smi_wait_ready(pep
)) {
1340 netdev_err(pep
->dev
, "pxa168_eth: SMI bus busy timeout\n");
1347 static int pxa168_eth_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
,
1351 return phy_mii_ioctl(dev
->phydev
, ifr
, cmd
);
1356 #ifdef CONFIG_NET_POLL_CONTROLLER
1357 static void pxa168_eth_netpoll(struct net_device
*dev
)
1359 disable_irq(dev
->irq
);
1360 pxa168_eth_int_handler(dev
->irq
, dev
);
1361 enable_irq(dev
->irq
);
1365 static void pxa168_get_drvinfo(struct net_device
*dev
,
1366 struct ethtool_drvinfo
*info
)
1368 strlcpy(info
->driver
, DRIVER_NAME
, sizeof(info
->driver
));
1369 strlcpy(info
->version
, DRIVER_VERSION
, sizeof(info
->version
));
1370 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
1371 strlcpy(info
->bus_info
, "N/A", sizeof(info
->bus_info
));
1374 static const struct ethtool_ops pxa168_ethtool_ops
= {
1375 .get_drvinfo
= pxa168_get_drvinfo
,
1376 .nway_reset
= phy_ethtool_nway_reset
,
1377 .get_link
= ethtool_op_get_link
,
1378 .get_ts_info
= ethtool_op_get_ts_info
,
1379 .get_link_ksettings
= phy_ethtool_get_link_ksettings
,
1380 .set_link_ksettings
= phy_ethtool_set_link_ksettings
,
1383 static const struct net_device_ops pxa168_eth_netdev_ops
= {
1384 .ndo_open
= pxa168_eth_open
,
1385 .ndo_stop
= pxa168_eth_stop
,
1386 .ndo_start_xmit
= pxa168_eth_start_xmit
,
1387 .ndo_set_rx_mode
= pxa168_eth_set_rx_mode
,
1388 .ndo_set_mac_address
= pxa168_eth_set_mac_address
,
1389 .ndo_validate_addr
= eth_validate_addr
,
1390 .ndo_do_ioctl
= pxa168_eth_do_ioctl
,
1391 .ndo_change_mtu
= pxa168_eth_change_mtu
,
1392 .ndo_tx_timeout
= pxa168_eth_tx_timeout
,
1393 #ifdef CONFIG_NET_POLL_CONTROLLER
1394 .ndo_poll_controller
= pxa168_eth_netpoll
,
1398 static int pxa168_eth_probe(struct platform_device
*pdev
)
1400 struct pxa168_eth_private
*pep
= NULL
;
1401 struct net_device
*dev
= NULL
;
1402 struct resource
*res
;
1404 struct device_node
*np
;
1405 const unsigned char *mac_addr
= NULL
;
1408 printk(KERN_NOTICE
"PXA168 10/100 Ethernet Driver\n");
1410 clk
= devm_clk_get(&pdev
->dev
, NULL
);
1412 dev_err(&pdev
->dev
, "Fast Ethernet failed to get clock\n");
1415 clk_prepare_enable(clk
);
1417 dev
= alloc_etherdev(sizeof(struct pxa168_eth_private
));
1423 platform_set_drvdata(pdev
, dev
);
1424 pep
= netdev_priv(dev
);
1428 pep
->base
= devm_platform_ioremap_resource(pdev
, 0);
1429 if (IS_ERR(pep
->base
)) {
1434 res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
1436 dev
->irq
= res
->start
;
1437 dev
->netdev_ops
= &pxa168_eth_netdev_ops
;
1438 dev
->watchdog_timeo
= 2 * HZ
;
1440 dev
->ethtool_ops
= &pxa168_ethtool_ops
;
1442 /* MTU range: 68 - 9500 */
1443 dev
->min_mtu
= ETH_MIN_MTU
;
1444 dev
->max_mtu
= 9500;
1446 INIT_WORK(&pep
->tx_timeout_task
, pxa168_eth_tx_timeout_task
);
1448 if (pdev
->dev
.of_node
)
1449 mac_addr
= of_get_mac_address(pdev
->dev
.of_node
);
1451 if (!IS_ERR_OR_NULL(mac_addr
)) {
1452 ether_addr_copy(dev
->dev_addr
, mac_addr
);
1454 /* try reading the mac address, if set by the bootloader */
1455 pxa168_eth_get_mac_address(dev
, dev
->dev_addr
);
1456 if (!is_valid_ether_addr(dev
->dev_addr
)) {
1457 dev_info(&pdev
->dev
, "Using random mac address\n");
1458 eth_hw_addr_random(dev
);
1462 pep
->rx_ring_size
= NUM_RX_DESCS
;
1463 pep
->tx_ring_size
= NUM_TX_DESCS
;
1465 pep
->pd
= dev_get_platdata(&pdev
->dev
);
1467 if (pep
->pd
->rx_queue_size
)
1468 pep
->rx_ring_size
= pep
->pd
->rx_queue_size
;
1470 if (pep
->pd
->tx_queue_size
)
1471 pep
->tx_ring_size
= pep
->pd
->tx_queue_size
;
1473 pep
->port_num
= pep
->pd
->port_number
;
1474 pep
->phy_addr
= pep
->pd
->phy_addr
;
1475 pep
->phy_speed
= pep
->pd
->speed
;
1476 pep
->phy_duplex
= pep
->pd
->duplex
;
1477 pep
->phy_intf
= pep
->pd
->intf
;
1481 } else if (pdev
->dev
.of_node
) {
1482 of_property_read_u32(pdev
->dev
.of_node
, "port-id",
1485 np
= of_parse_phandle(pdev
->dev
.of_node
, "phy-handle", 0);
1487 dev_err(&pdev
->dev
, "missing phy-handle\n");
1491 of_property_read_u32(np
, "reg", &pep
->phy_addr
);
1492 pep
->phy_intf
= of_get_phy_mode(pdev
->dev
.of_node
);
1496 /* Hardware supports only 3 ports */
1497 BUG_ON(pep
->port_num
> 2);
1498 netif_napi_add(dev
, &pep
->napi
, pxa168_rx_poll
, pep
->rx_ring_size
);
1500 memset(&pep
->timeout
, 0, sizeof(struct timer_list
));
1501 timer_setup(&pep
->timeout
, rxq_refill_timer_wrapper
, 0);
1503 pep
->smi_bus
= mdiobus_alloc();
1504 if (!pep
->smi_bus
) {
1508 pep
->smi_bus
->priv
= pep
;
1509 pep
->smi_bus
->name
= "pxa168_eth smi";
1510 pep
->smi_bus
->read
= pxa168_smi_read
;
1511 pep
->smi_bus
->write
= pxa168_smi_write
;
1512 snprintf(pep
->smi_bus
->id
, MII_BUS_ID_SIZE
, "%s-%d",
1513 pdev
->name
, pdev
->id
);
1514 pep
->smi_bus
->parent
= &pdev
->dev
;
1515 pep
->smi_bus
->phy_mask
= 0xffffffff;
1516 err
= mdiobus_register(pep
->smi_bus
);
1521 SET_NETDEV_DEV(dev
, &pdev
->dev
);
1522 pxa168_init_hw(pep
);
1523 err
= register_netdev(dev
);
1529 mdiobus_unregister(pep
->smi_bus
);
1531 mdiobus_free(pep
->smi_bus
);
1535 clk_disable_unprepare(clk
);
1539 static int pxa168_eth_remove(struct platform_device
*pdev
)
1541 struct net_device
*dev
= platform_get_drvdata(pdev
);
1542 struct pxa168_eth_private
*pep
= netdev_priv(dev
);
1545 dma_free_coherent(pep
->dev
->dev
.parent
, HASH_ADDR_TABLE_SIZE
,
1546 pep
->htpr
, pep
->htpr_dma
);
1550 phy_disconnect(dev
->phydev
);
1552 clk_disable_unprepare(pep
->clk
);
1555 mdiobus_unregister(pep
->smi_bus
);
1556 mdiobus_free(pep
->smi_bus
);
1557 unregister_netdev(dev
);
1558 cancel_work_sync(&pep
->tx_timeout_task
);
1563 static void pxa168_eth_shutdown(struct platform_device
*pdev
)
1565 struct net_device
*dev
= platform_get_drvdata(pdev
);
1566 eth_port_reset(dev
);
1570 static int pxa168_eth_resume(struct platform_device
*pdev
)
1575 static int pxa168_eth_suspend(struct platform_device
*pdev
, pm_message_t state
)
1581 #define pxa168_eth_resume NULL
1582 #define pxa168_eth_suspend NULL
1585 static const struct of_device_id pxa168_eth_of_match
[] = {
1586 { .compatible
= "marvell,pxa168-eth" },
1589 MODULE_DEVICE_TABLE(of
, pxa168_eth_of_match
);
1591 static struct platform_driver pxa168_eth_driver
= {
1592 .probe
= pxa168_eth_probe
,
1593 .remove
= pxa168_eth_remove
,
1594 .shutdown
= pxa168_eth_shutdown
,
1595 .resume
= pxa168_eth_resume
,
1596 .suspend
= pxa168_eth_suspend
,
1598 .name
= DRIVER_NAME
,
1599 .of_match_table
= of_match_ptr(pxa168_eth_of_match
),
1603 module_platform_driver(pxa168_eth_driver
);
1605 MODULE_LICENSE("GPL");
1606 MODULE_DESCRIPTION("Ethernet driver for Marvell PXA168");
1607 MODULE_ALIAS("platform:pxa168_eth");