2 * Blackfin On-Chip MAC Driver
4 * Copyright 2004-2007 Analog Devices Inc.
6 * Enter bugs at http://blackfin.uclinux.org/
8 * Licensed under the GPL-2 or later.
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/timer.h>
18 #include <linux/errno.h>
19 #include <linux/irq.h>
21 #include <linux/ioport.h>
22 #include <linux/crc32.h>
23 #include <linux/device.h>
24 #include <linux/spinlock.h>
25 #include <linux/mii.h>
26 #include <linux/phy.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
30 #include <linux/skbuff.h>
31 #include <linux/platform_device.h>
34 #include <linux/dma-mapping.h>
36 #include <asm/div64.h>
38 #include <asm/blackfin.h>
39 #include <asm/cacheflush.h>
40 #include <asm/portmux.h>
45 #define DRV_NAME "bfin_mac"
46 #define DRV_VERSION "1.1"
47 #define DRV_AUTHOR "Bryan Wu, Luke Yang"
48 #define DRV_DESC "Blackfin on-chip Ethernet MAC driver"
50 MODULE_AUTHOR(DRV_AUTHOR
);
51 MODULE_LICENSE("GPL");
52 MODULE_DESCRIPTION(DRV_DESC
);
53 MODULE_ALIAS("platform:bfin_mac");
55 #if defined(CONFIG_BFIN_MAC_USE_L1)
56 # define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size)
57 # define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr)
59 # define bfin_mac_alloc(dma_handle, size) \
60 dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL)
61 # define bfin_mac_free(dma_handle, ptr) \
62 dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle)
65 #define PKT_BUF_SZ 1580
67 #define MAX_TIMEOUT_CNT 500
69 /* pointers to maintain transmit list */
70 static struct net_dma_desc_tx
*tx_list_head
;
71 static struct net_dma_desc_tx
*tx_list_tail
;
72 static struct net_dma_desc_rx
*rx_list_head
;
73 static struct net_dma_desc_rx
*rx_list_tail
;
74 static struct net_dma_desc_rx
*current_rx_ptr
;
75 static struct net_dma_desc_tx
*current_tx_ptr
;
76 static struct net_dma_desc_tx
*tx_desc
;
77 static struct net_dma_desc_rx
*rx_desc
;
79 #if defined(CONFIG_BFIN_MAC_RMII)
80 static u16 pin_req
[] = P_RMII0
;
82 static u16 pin_req
[] = P_MII0
;
85 static void desc_list_free(void)
87 struct net_dma_desc_rx
*r
;
88 struct net_dma_desc_tx
*t
;
90 #if !defined(CONFIG_BFIN_MAC_USE_L1)
91 dma_addr_t dma_handle
= 0;
96 for (i
= 0; i
< CONFIG_BFIN_TX_DESC_NUM
; i
++) {
99 dev_kfree_skb(t
->skb
);
105 bfin_mac_free(dma_handle
, tx_desc
);
110 for (i
= 0; i
< CONFIG_BFIN_RX_DESC_NUM
; i
++) {
113 dev_kfree_skb(r
->skb
);
119 bfin_mac_free(dma_handle
, rx_desc
);
123 static int desc_list_init(void)
126 struct sk_buff
*new_skb
;
127 #if !defined(CONFIG_BFIN_MAC_USE_L1)
129 * This dma_handle is useless in Blackfin dma_alloc_coherent().
130 * The real dma handler is the return value of dma_alloc_coherent().
132 dma_addr_t dma_handle
;
135 tx_desc
= bfin_mac_alloc(&dma_handle
,
136 sizeof(struct net_dma_desc_tx
) *
137 CONFIG_BFIN_TX_DESC_NUM
);
141 rx_desc
= bfin_mac_alloc(&dma_handle
,
142 sizeof(struct net_dma_desc_rx
) *
143 CONFIG_BFIN_RX_DESC_NUM
);
148 tx_list_head
= tx_list_tail
= tx_desc
;
150 for (i
= 0; i
< CONFIG_BFIN_TX_DESC_NUM
; i
++) {
151 struct net_dma_desc_tx
*t
= tx_desc
+ i
;
152 struct dma_descriptor
*a
= &(t
->desc_a
);
153 struct dma_descriptor
*b
= &(t
->desc_b
);
157 * read from memory WNR = 0
158 * wordsize is 32 bits
159 * 6 half words is desc size
162 a
->config
= WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
163 a
->start_addr
= (unsigned long)t
->packet
;
165 a
->next_dma_desc
= b
;
169 * write to memory WNR = 1
170 * wordsize is 32 bits
172 * 6 half words is desc size
175 b
->config
= DMAEN
| WNR
| WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
176 b
->start_addr
= (unsigned long)(&(t
->status
));
180 tx_list_tail
->desc_b
.next_dma_desc
= a
;
181 tx_list_tail
->next
= t
;
184 tx_list_tail
->next
= tx_list_head
; /* tx_list is a circle */
185 tx_list_tail
->desc_b
.next_dma_desc
= &(tx_list_head
->desc_a
);
186 current_tx_ptr
= tx_list_head
;
189 rx_list_head
= rx_list_tail
= rx_desc
;
191 for (i
= 0; i
< CONFIG_BFIN_RX_DESC_NUM
; i
++) {
192 struct net_dma_desc_rx
*r
= rx_desc
+ i
;
193 struct dma_descriptor
*a
= &(r
->desc_a
);
194 struct dma_descriptor
*b
= &(r
->desc_b
);
196 /* allocate a new skb for next time receive */
197 new_skb
= dev_alloc_skb(PKT_BUF_SZ
+ NET_IP_ALIGN
);
199 printk(KERN_NOTICE DRV_NAME
200 ": init: low on mem - packet dropped\n");
203 skb_reserve(new_skb
, NET_IP_ALIGN
);
204 /* Invidate the data cache of skb->data range when it is write back
205 * cache. It will prevent overwritting the new data from DMA
207 blackfin_dcache_invalidate_range((unsigned long)new_skb
->head
,
208 (unsigned long)new_skb
->end
);
213 * write to memory WNR = 1
214 * wordsize is 32 bits
216 * 6 half words is desc size
219 a
->config
= DMAEN
| WNR
| WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
220 /* since RXDWA is enabled */
221 a
->start_addr
= (unsigned long)new_skb
->data
- 2;
223 a
->next_dma_desc
= b
;
227 * write to memory WNR = 1
228 * wordsize is 32 bits
230 * 6 half words is desc size
233 b
->config
= DMAEN
| WNR
| WDSIZE_32
| DI_EN
|
234 NDSIZE_6
| DMAFLOW_LARGE
;
235 b
->start_addr
= (unsigned long)(&(r
->status
));
238 rx_list_tail
->desc_b
.next_dma_desc
= a
;
239 rx_list_tail
->next
= r
;
242 rx_list_tail
->next
= rx_list_head
; /* rx_list is a circle */
243 rx_list_tail
->desc_b
.next_dma_desc
= &(rx_list_head
->desc_a
);
244 current_rx_ptr
= rx_list_head
;
250 printk(KERN_ERR DRV_NAME
": kmalloc failed\n");
255 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
260 /* Wait until the previous MDC/MDIO transaction has completed */
261 static int bfin_mdio_poll(void)
263 int timeout_cnt
= MAX_TIMEOUT_CNT
;
265 /* poll the STABUSY bit */
266 while ((bfin_read_EMAC_STAADD()) & STABUSY
) {
268 if (timeout_cnt
-- < 0) {
269 printk(KERN_ERR DRV_NAME
270 ": wait MDC/MDIO transaction to complete timeout\n");
278 /* Read an off-chip register in a PHY through the MDC/MDIO port */
279 static int bfin_mdiobus_read(struct mii_bus
*bus
, int phy_addr
, int regnum
)
283 ret
= bfin_mdio_poll();
288 bfin_write_EMAC_STAADD(SET_PHYAD((u16
) phy_addr
) |
289 SET_REGAD((u16
) regnum
) |
292 ret
= bfin_mdio_poll();
296 return (int) bfin_read_EMAC_STADAT();
299 /* Write an off-chip register in a PHY through the MDC/MDIO port */
300 static int bfin_mdiobus_write(struct mii_bus
*bus
, int phy_addr
, int regnum
,
305 ret
= bfin_mdio_poll();
309 bfin_write_EMAC_STADAT((u32
) value
);
312 bfin_write_EMAC_STAADD(SET_PHYAD((u16
) phy_addr
) |
313 SET_REGAD((u16
) regnum
) |
317 return bfin_mdio_poll();
320 static int bfin_mdiobus_reset(struct mii_bus
*bus
)
325 static void bfin_mac_adjust_link(struct net_device
*dev
)
327 struct bfin_mac_local
*lp
= netdev_priv(dev
);
328 struct phy_device
*phydev
= lp
->phydev
;
332 spin_lock_irqsave(&lp
->lock
, flags
);
334 /* Now we make sure that we can be in full duplex mode.
335 * If not, we operate in half-duplex mode. */
336 if (phydev
->duplex
!= lp
->old_duplex
) {
337 u32 opmode
= bfin_read_EMAC_OPMODE();
345 bfin_write_EMAC_OPMODE(opmode
);
346 lp
->old_duplex
= phydev
->duplex
;
349 if (phydev
->speed
!= lp
->old_speed
) {
350 #if defined(CONFIG_BFIN_MAC_RMII)
351 u32 opmode
= bfin_read_EMAC_OPMODE();
352 switch (phydev
->speed
) {
357 opmode
&= ~(RMII_10
);
361 "%s: Ack! Speed (%d) is not 10/100!\n",
362 DRV_NAME
, phydev
->speed
);
365 bfin_write_EMAC_OPMODE(opmode
);
369 lp
->old_speed
= phydev
->speed
;
376 } else if (lp
->old_link
) {
384 u32 opmode
= bfin_read_EMAC_OPMODE();
385 phy_print_status(phydev
);
386 pr_debug("EMAC_OPMODE = 0x%08x\n", opmode
);
389 spin_unlock_irqrestore(&lp
->lock
, flags
);
393 #define MDC_CLK 2500000
395 static int mii_probe(struct net_device
*dev
)
397 struct bfin_mac_local
*lp
= netdev_priv(dev
);
398 struct phy_device
*phydev
= NULL
;
399 unsigned short sysctl
;
403 /* Enable PHY output early */
404 if (!(bfin_read_VR_CTL() & CLKBUFOE
))
405 bfin_write_VR_CTL(bfin_read_VR_CTL() | CLKBUFOE
);
408 mdc_div
= ((sclk
/ MDC_CLK
) / 2) - 1;
410 sysctl
= bfin_read_EMAC_SYSCTL();
411 sysctl
= (sysctl
& ~MDCDIV
) | SET_MDCDIV(mdc_div
);
412 bfin_write_EMAC_SYSCTL(sysctl
);
414 /* search for connect PHY device */
415 for (i
= 0; i
< PHY_MAX_ADDR
; i
++) {
416 struct phy_device
*const tmp_phydev
= lp
->mii_bus
->phy_map
[i
];
419 continue; /* no PHY here... */
422 break; /* found it */
425 /* now we are supposed to have a proper phydev, to attach to... */
427 printk(KERN_INFO
"%s: Don't found any phy device at all\n",
432 #if defined(CONFIG_BFIN_MAC_RMII)
433 phydev
= phy_connect(dev
, dev_name(&phydev
->dev
), &bfin_mac_adjust_link
,
434 0, PHY_INTERFACE_MODE_RMII
);
436 phydev
= phy_connect(dev
, dev_name(&phydev
->dev
), &bfin_mac_adjust_link
,
437 0, PHY_INTERFACE_MODE_MII
);
440 if (IS_ERR(phydev
)) {
441 printk(KERN_ERR
"%s: Could not attach to PHY\n", dev
->name
);
442 return PTR_ERR(phydev
);
445 /* mask with MAC supported features */
446 phydev
->supported
&= (SUPPORTED_10baseT_Half
447 | SUPPORTED_10baseT_Full
448 | SUPPORTED_100baseT_Half
449 | SUPPORTED_100baseT_Full
451 | SUPPORTED_Pause
| SUPPORTED_Asym_Pause
455 phydev
->advertising
= phydev
->supported
;
462 printk(KERN_INFO
"%s: attached PHY driver [%s] "
463 "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
465 DRV_NAME
, phydev
->drv
->name
, dev_name(&phydev
->dev
), phydev
->irq
,
466 MDC_CLK
, mdc_div
, sclk
/1000000);
476 * interrupt routine for magic packet wakeup
478 static irqreturn_t
bfin_mac_wake_interrupt(int irq
, void *dev_id
)
484 bfin_mac_ethtool_getsettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
486 struct bfin_mac_local
*lp
= netdev_priv(dev
);
489 return phy_ethtool_gset(lp
->phydev
, cmd
);
495 bfin_mac_ethtool_setsettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
497 struct bfin_mac_local
*lp
= netdev_priv(dev
);
499 if (!capable(CAP_NET_ADMIN
))
503 return phy_ethtool_sset(lp
->phydev
, cmd
);
508 static void bfin_mac_ethtool_getdrvinfo(struct net_device
*dev
,
509 struct ethtool_drvinfo
*info
)
511 strcpy(info
->driver
, DRV_NAME
);
512 strcpy(info
->version
, DRV_VERSION
);
513 strcpy(info
->fw_version
, "N/A");
514 strcpy(info
->bus_info
, dev_name(&dev
->dev
));
517 static void bfin_mac_ethtool_getwol(struct net_device
*dev
,
518 struct ethtool_wolinfo
*wolinfo
)
520 struct bfin_mac_local
*lp
= netdev_priv(dev
);
522 wolinfo
->supported
= WAKE_MAGIC
;
523 wolinfo
->wolopts
= lp
->wol
;
526 static int bfin_mac_ethtool_setwol(struct net_device
*dev
,
527 struct ethtool_wolinfo
*wolinfo
)
529 struct bfin_mac_local
*lp
= netdev_priv(dev
);
532 if (wolinfo
->wolopts
& (WAKE_MAGICSECURE
|
539 lp
->wol
= wolinfo
->wolopts
;
541 if (lp
->wol
&& !lp
->irq_wake_requested
) {
542 /* register wake irq handler */
543 rc
= request_irq(IRQ_MAC_WAKEDET
, bfin_mac_wake_interrupt
,
544 IRQF_DISABLED
, "EMAC_WAKE", dev
);
547 lp
->irq_wake_requested
= true;
550 if (!lp
->wol
&& lp
->irq_wake_requested
) {
551 free_irq(IRQ_MAC_WAKEDET
, dev
);
552 lp
->irq_wake_requested
= false;
555 /* Make sure the PHY driver doesn't suspend */
556 device_init_wakeup(&dev
->dev
, lp
->wol
);
561 static const struct ethtool_ops bfin_mac_ethtool_ops
= {
562 .get_settings
= bfin_mac_ethtool_getsettings
,
563 .set_settings
= bfin_mac_ethtool_setsettings
,
564 .get_link
= ethtool_op_get_link
,
565 .get_drvinfo
= bfin_mac_ethtool_getdrvinfo
,
566 .get_wol
= bfin_mac_ethtool_getwol
,
567 .set_wol
= bfin_mac_ethtool_setwol
,
570 /**************************************************************************/
571 void setup_system_regs(struct net_device
*dev
)
573 unsigned short sysctl
;
576 * Odd word alignment for Receive Frame DMA word
577 * Configure checksum support and rcve frame word alignment
579 sysctl
= bfin_read_EMAC_SYSCTL();
581 #if defined(BFIN_MAC_CSUM_OFFLOAD)
586 bfin_write_EMAC_SYSCTL(sysctl
);
588 bfin_write_EMAC_MMC_CTL(RSTC
| CROLL
);
590 /* Initialize the TX DMA channel registers */
591 bfin_write_DMA2_X_COUNT(0);
592 bfin_write_DMA2_X_MODIFY(4);
593 bfin_write_DMA2_Y_COUNT(0);
594 bfin_write_DMA2_Y_MODIFY(0);
596 /* Initialize the RX DMA channel registers */
597 bfin_write_DMA1_X_COUNT(0);
598 bfin_write_DMA1_X_MODIFY(4);
599 bfin_write_DMA1_Y_COUNT(0);
600 bfin_write_DMA1_Y_MODIFY(0);
603 static void setup_mac_addr(u8
*mac_addr
)
605 u32 addr_low
= le32_to_cpu(*(__le32
*) & mac_addr
[0]);
606 u16 addr_hi
= le16_to_cpu(*(__le16
*) & mac_addr
[4]);
608 /* this depends on a little-endian machine */
609 bfin_write_EMAC_ADDRLO(addr_low
);
610 bfin_write_EMAC_ADDRHI(addr_hi
);
613 static int bfin_mac_set_mac_address(struct net_device
*dev
, void *p
)
615 struct sockaddr
*addr
= p
;
616 if (netif_running(dev
))
618 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
619 setup_mac_addr(dev
->dev_addr
);
623 #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP
624 #define bfin_mac_hwtstamp_is_none(cfg) ((cfg) == HWTSTAMP_FILTER_NONE)
626 static int bfin_mac_hwtstamp_ioctl(struct net_device
*netdev
,
627 struct ifreq
*ifr
, int cmd
)
629 struct hwtstamp_config config
;
630 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
632 u32 ptpfv1
, ptpfv2
, ptpfv3
, ptpfoff
;
634 if (copy_from_user(&config
, ifr
->ifr_data
, sizeof(config
)))
637 pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
638 __func__
, config
.flags
, config
.tx_type
, config
.rx_filter
);
640 /* reserved for future extensions */
644 if ((config
.tx_type
!= HWTSTAMP_TX_OFF
) &&
645 (config
.tx_type
!= HWTSTAMP_TX_ON
))
648 ptpctl
= bfin_read_EMAC_PTP_CTL();
650 switch (config
.rx_filter
) {
651 case HWTSTAMP_FILTER_NONE
:
653 * Dont allow any timestamping
656 bfin_write_EMAC_PTP_FV3(ptpfv3
);
658 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT
:
659 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC
:
660 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ
:
662 * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL)
663 * to enable all the field matches.
666 bfin_write_EMAC_PTP_CTL(ptpctl
);
668 * Keep the default values of the EMAC_PTP_FOFF register.
670 ptpfoff
= 0x4A24170C;
671 bfin_write_EMAC_PTP_FOFF(ptpfoff
);
673 * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2
677 bfin_write_EMAC_PTP_FV1(ptpfv1
);
679 bfin_write_EMAC_PTP_FV2(ptpfv2
);
681 * The default value (0xFFFC) allows the timestamping of both
682 * received Sync messages and Delay_Req messages.
685 bfin_write_EMAC_PTP_FV3(ptpfv3
);
687 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V1_L4_EVENT
;
689 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT
:
690 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC
:
691 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ
:
692 /* Clear all five comparison mask bits (bits[12:8]) in the
693 * EMAC_PTP_CTL register to enable all the field matches.
696 bfin_write_EMAC_PTP_CTL(ptpctl
);
698 * Keep the default values of the EMAC_PTP_FOFF register, except set
699 * the PTPCOF field to 0x2A.
701 ptpfoff
= 0x2A24170C;
702 bfin_write_EMAC_PTP_FOFF(ptpfoff
);
704 * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2
708 bfin_write_EMAC_PTP_FV1(ptpfv1
);
710 bfin_write_EMAC_PTP_FV2(ptpfv2
);
712 * To allow the timestamping of Pdelay_Req and Pdelay_Resp, set
713 * the value to 0xFFF0.
716 bfin_write_EMAC_PTP_FV3(ptpfv3
);
718 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_L4_EVENT
;
720 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT
:
721 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC
:
722 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ
:
724 * Clear bits 8 and 12 of the EMAC_PTP_CTL register to enable only the
725 * EFTM and PTPCM field comparison.
728 bfin_write_EMAC_PTP_CTL(ptpctl
);
730 * Keep the default values of all the fields of the EMAC_PTP_FOFF
731 * register, except set the PTPCOF field to 0x0E.
733 ptpfoff
= 0x0E24170C;
734 bfin_write_EMAC_PTP_FOFF(ptpfoff
);
736 * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which
737 * corresponds to PTP messages on the MAC layer.
740 bfin_write_EMAC_PTP_FV1(ptpfv1
);
742 bfin_write_EMAC_PTP_FV2(ptpfv2
);
744 * To allow the timestamping of Pdelay_Req and Pdelay_Resp
745 * messages, set the value to 0xFFF0.
748 bfin_write_EMAC_PTP_FV3(ptpfv3
);
750 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_L2_EVENT
;
756 if (config
.tx_type
== HWTSTAMP_TX_OFF
&&
757 bfin_mac_hwtstamp_is_none(config
.rx_filter
)) {
759 bfin_write_EMAC_PTP_CTL(ptpctl
);
764 bfin_write_EMAC_PTP_CTL(ptpctl
);
767 * clear any existing timestamp
769 bfin_read_EMAC_PTP_RXSNAPLO();
770 bfin_read_EMAC_PTP_RXSNAPHI();
772 bfin_read_EMAC_PTP_TXSNAPLO();
773 bfin_read_EMAC_PTP_TXSNAPHI();
776 * Set registers so that rollover occurs soon to test this.
778 bfin_write_EMAC_PTP_TIMELO(0x00000000);
779 bfin_write_EMAC_PTP_TIMEHI(0xFF800000);
783 lp
->compare
.last_update
= 0;
784 timecounter_init(&lp
->clock
,
786 ktime_to_ns(ktime_get_real()));
787 timecompare_update(&lp
->compare
, 0);
790 lp
->stamp_cfg
= config
;
791 return copy_to_user(ifr
->ifr_data
, &config
, sizeof(config
)) ?
795 static void bfin_dump_hwtamp(char *s
, ktime_t
*hw
, ktime_t
*ts
, struct timecompare
*cmp
)
797 ktime_t sys
= ktime_get_real();
799 pr_debug("%s %s hardware:%d,%d transform system:%d,%d system:%d,%d, cmp:%lld, %lld\n",
800 __func__
, s
, hw
->tv
.sec
, hw
->tv
.nsec
, ts
->tv
.sec
, ts
->tv
.nsec
, sys
.tv
.sec
,
801 sys
.tv
.nsec
, cmp
->offset
, cmp
->skew
);
804 static void bfin_tx_hwtstamp(struct net_device
*netdev
, struct sk_buff
*skb
)
806 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
807 union skb_shared_tx
*shtx
= skb_tx(skb
);
809 if (shtx
->hardware
) {
810 int timeout_cnt
= MAX_TIMEOUT_CNT
;
812 /* When doing time stamping, keep the connection to the socket
815 shtx
->in_progress
= 1;
818 * The timestamping is done at the EMAC module's MII/RMII interface
819 * when the module sees the Start of Frame of an event message packet. This
820 * interface is the closest possible place to the physical Ethernet transmission
821 * medium, providing the best timing accuracy.
823 while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL
)) && (--timeout_cnt
))
825 if (timeout_cnt
== 0)
826 printk(KERN_ERR DRV_NAME
827 ": fails to timestamp the TX packet\n");
829 struct skb_shared_hwtstamps shhwtstamps
;
833 regval
= bfin_read_EMAC_PTP_TXSNAPLO();
834 regval
|= (u64
)bfin_read_EMAC_PTP_TXSNAPHI() << 32;
835 memset(&shhwtstamps
, 0, sizeof(shhwtstamps
));
836 ns
= timecounter_cyc2time(&lp
->clock
,
838 timecompare_update(&lp
->compare
, ns
);
839 shhwtstamps
.hwtstamp
= ns_to_ktime(ns
);
840 shhwtstamps
.syststamp
=
841 timecompare_transform(&lp
->compare
, ns
);
842 skb_tstamp_tx(skb
, &shhwtstamps
);
844 bfin_dump_hwtamp("TX", &shhwtstamps
.hwtstamp
, &shhwtstamps
.syststamp
, &lp
->compare
);
849 static void bfin_rx_hwtstamp(struct net_device
*netdev
, struct sk_buff
*skb
)
851 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
854 struct skb_shared_hwtstamps
*shhwtstamps
;
856 if (bfin_mac_hwtstamp_is_none(lp
->stamp_cfg
.rx_filter
))
859 valid
= bfin_read_EMAC_PTP_ISTAT() & RXEL
;
863 shhwtstamps
= skb_hwtstamps(skb
);
865 regval
= bfin_read_EMAC_PTP_RXSNAPLO();
866 regval
|= (u64
)bfin_read_EMAC_PTP_RXSNAPHI() << 32;
867 ns
= timecounter_cyc2time(&lp
->clock
, regval
);
868 timecompare_update(&lp
->compare
, ns
);
869 memset(shhwtstamps
, 0, sizeof(*shhwtstamps
));
870 shhwtstamps
->hwtstamp
= ns_to_ktime(ns
);
871 shhwtstamps
->syststamp
= timecompare_transform(&lp
->compare
, ns
);
873 bfin_dump_hwtamp("RX", &shhwtstamps
->hwtstamp
, &shhwtstamps
->syststamp
, &lp
->compare
);
877 * bfin_read_clock - read raw cycle counter (to be used by time counter)
879 static cycle_t
bfin_read_clock(const struct cyclecounter
*tc
)
883 stamp
= bfin_read_EMAC_PTP_TIMELO();
884 stamp
|= (u64
)bfin_read_EMAC_PTP_TIMEHI() << 32ULL;
889 #define PTP_CLK 25000000
891 static void bfin_mac_hwtstamp_init(struct net_device
*netdev
)
893 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
896 /* Initialize hardware timer */
897 append
= PTP_CLK
* (1ULL << 32);
898 do_div(append
, get_sclk());
899 bfin_write_EMAC_PTP_ADDEND((u32
)append
);
901 memset(&lp
->cycles
, 0, sizeof(lp
->cycles
));
902 lp
->cycles
.read
= bfin_read_clock
;
903 lp
->cycles
.mask
= CLOCKSOURCE_MASK(64);
904 lp
->cycles
.mult
= 1000000000 / PTP_CLK
;
905 lp
->cycles
.shift
= 0;
907 /* Synchronize our NIC clock against system wall clock */
908 memset(&lp
->compare
, 0, sizeof(lp
->compare
));
909 lp
->compare
.source
= &lp
->clock
;
910 lp
->compare
.target
= ktime_get_real
;
911 lp
->compare
.num_samples
= 10;
913 /* Initialize hwstamp config */
914 lp
->stamp_cfg
.rx_filter
= HWTSTAMP_FILTER_NONE
;
915 lp
->stamp_cfg
.tx_type
= HWTSTAMP_TX_OFF
;
919 # define bfin_mac_hwtstamp_is_none(cfg) 0
920 # define bfin_mac_hwtstamp_init(dev)
921 # define bfin_mac_hwtstamp_ioctl(dev, ifr, cmd) (-EOPNOTSUPP)
922 # define bfin_rx_hwtstamp(dev, skb)
923 # define bfin_tx_hwtstamp(dev, skb)
926 static inline void _tx_reclaim_skb(void)
929 tx_list_head
->desc_a
.config
&= ~DMAEN
;
930 tx_list_head
->status
.status_word
= 0;
931 if (tx_list_head
->skb
) {
932 dev_kfree_skb(tx_list_head
->skb
);
933 tx_list_head
->skb
= NULL
;
935 tx_list_head
= tx_list_head
->next
;
937 } while (tx_list_head
->status
.status_word
!= 0);
940 static void tx_reclaim_skb(struct bfin_mac_local
*lp
)
942 int timeout_cnt
= MAX_TIMEOUT_CNT
;
944 if (tx_list_head
->status
.status_word
!= 0)
947 if (current_tx_ptr
->next
== tx_list_head
) {
948 while (tx_list_head
->status
.status_word
== 0) {
949 /* slow down polling to avoid too many queue stop. */
951 /* reclaim skb if DMA is not running. */
952 if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN
))
954 if (timeout_cnt
-- < 0)
958 if (timeout_cnt
>= 0)
961 netif_stop_queue(lp
->ndev
);
964 if (current_tx_ptr
->next
!= tx_list_head
&&
965 netif_queue_stopped(lp
->ndev
))
966 netif_wake_queue(lp
->ndev
);
968 if (tx_list_head
!= current_tx_ptr
) {
969 /* shorten the timer interval if tx queue is stopped */
970 if (netif_queue_stopped(lp
->ndev
))
971 lp
->tx_reclaim_timer
.expires
=
972 jiffies
+ (TX_RECLAIM_JIFFIES
>> 4);
974 lp
->tx_reclaim_timer
.expires
=
975 jiffies
+ TX_RECLAIM_JIFFIES
;
977 mod_timer(&lp
->tx_reclaim_timer
,
978 lp
->tx_reclaim_timer
.expires
);
984 static void tx_reclaim_skb_timeout(unsigned long lp
)
986 tx_reclaim_skb((struct bfin_mac_local
*)lp
);
989 static int bfin_mac_hard_start_xmit(struct sk_buff
*skb
,
990 struct net_device
*dev
)
992 struct bfin_mac_local
*lp
= netdev_priv(dev
);
994 u32 data_align
= (unsigned long)(skb
->data
) & 0x3;
995 union skb_shared_tx
*shtx
= skb_tx(skb
);
997 current_tx_ptr
->skb
= skb
;
999 if (data_align
== 0x2) {
1000 /* move skb->data to current_tx_ptr payload */
1001 data
= (u16
*)(skb
->data
) - 1;
1002 *data
= (u16
)(skb
->len
);
1004 * When transmitting an Ethernet packet, the PTP_TSYNC module requires
1005 * a DMA_Length_Word field associated with the packet. The lower 12 bits
1006 * of this field are the length of the packet payload in bytes and the higher
1007 * 4 bits are the timestamping enable field.
1012 current_tx_ptr
->desc_a
.start_addr
= (u32
)data
;
1013 /* this is important! */
1014 blackfin_dcache_flush_range((u32
)data
,
1015 (u32
)((u8
*)data
+ skb
->len
+ 4));
1017 *((u16
*)(current_tx_ptr
->packet
)) = (u16
)(skb
->len
);
1018 /* enable timestamping for the sent packet */
1020 *((u16
*)(current_tx_ptr
->packet
)) |= 0x1000;
1021 memcpy((u8
*)(current_tx_ptr
->packet
+ 2), skb
->data
,
1023 current_tx_ptr
->desc_a
.start_addr
=
1024 (u32
)current_tx_ptr
->packet
;
1025 blackfin_dcache_flush_range(
1026 (u32
)current_tx_ptr
->packet
,
1027 (u32
)(current_tx_ptr
->packet
+ skb
->len
+ 2));
1030 /* make sure the internal data buffers in the core are drained
1031 * so that the DMA descriptors are completely written when the
1032 * DMA engine goes to fetch them below
1036 /* always clear status buffer before start tx dma */
1037 current_tx_ptr
->status
.status_word
= 0;
1039 /* enable this packet's dma */
1040 current_tx_ptr
->desc_a
.config
|= DMAEN
;
1042 /* tx dma is running, just return */
1043 if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN
)
1046 /* tx dma is not running */
1047 bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr
->desc_a
));
1048 /* dma enabled, read from memory, size is 6 */
1049 bfin_write_DMA2_CONFIG(current_tx_ptr
->desc_a
.config
);
1050 /* Turn on the EMAC tx */
1051 bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE
);
1054 bfin_tx_hwtstamp(dev
, skb
);
1056 current_tx_ptr
= current_tx_ptr
->next
;
1057 dev
->stats
.tx_packets
++;
1058 dev
->stats
.tx_bytes
+= (skb
->len
);
1062 return NETDEV_TX_OK
;
1065 #define IP_HEADER_OFF 0
1066 #define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \
1067 RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE)
1069 static void bfin_mac_rx(struct net_device
*dev
)
1071 struct sk_buff
*skb
, *new_skb
;
1073 struct bfin_mac_local
*lp __maybe_unused
= netdev_priv(dev
);
1074 #if defined(BFIN_MAC_CSUM_OFFLOAD)
1076 unsigned char fcs
[ETH_FCS_LEN
+ 1];
1079 /* check if frame status word reports an error condition
1080 * we which case we simply drop the packet
1082 if (current_rx_ptr
->status
.status_word
& RX_ERROR_MASK
) {
1083 printk(KERN_NOTICE DRV_NAME
1084 ": rx: receive error - packet dropped\n");
1085 dev
->stats
.rx_dropped
++;
1089 /* allocate a new skb for next time receive */
1090 skb
= current_rx_ptr
->skb
;
1092 new_skb
= dev_alloc_skb(PKT_BUF_SZ
+ NET_IP_ALIGN
);
1094 printk(KERN_NOTICE DRV_NAME
1095 ": rx: low on mem - packet dropped\n");
1096 dev
->stats
.rx_dropped
++;
1099 /* reserve 2 bytes for RXDWA padding */
1100 skb_reserve(new_skb
, NET_IP_ALIGN
);
1101 /* Invidate the data cache of skb->data range when it is write back
1102 * cache. It will prevent overwritting the new data from DMA
1104 blackfin_dcache_invalidate_range((unsigned long)new_skb
->head
,
1105 (unsigned long)new_skb
->end
);
1107 current_rx_ptr
->skb
= new_skb
;
1108 current_rx_ptr
->desc_a
.start_addr
= (unsigned long)new_skb
->data
- 2;
1110 len
= (unsigned short)((current_rx_ptr
->status
.status_word
) & RX_FRLEN
);
1111 /* Deduce Ethernet FCS length from Ethernet payload length */
1115 skb
->protocol
= eth_type_trans(skb
, dev
);
1117 bfin_rx_hwtstamp(dev
, skb
);
1119 #if defined(BFIN_MAC_CSUM_OFFLOAD)
1120 /* Checksum offloading only works for IPv4 packets with the standard IP header
1121 * length of 20 bytes, because the blackfin MAC checksum calculation is
1122 * based on that assumption. We must NOT use the calculated checksum if our
1123 * IP version or header break that assumption.
1125 if (skb
->data
[IP_HEADER_OFF
] == 0x45) {
1126 skb
->csum
= current_rx_ptr
->status
.ip_payload_csum
;
1128 * Deduce Ethernet FCS from hardware generated IP payload checksum.
1129 * IP checksum is based on 16-bit one's complement algorithm.
1130 * To deduce a value from checksum is equal to add its inversion.
1131 * If the IP payload len is odd, the inversed FCS should also
1132 * begin from odd address and leave first byte zero.
1136 for (i
= 0; i
< ETH_FCS_LEN
; i
++)
1137 fcs
[i
+ 1] = ~skb
->data
[skb
->len
+ i
];
1138 skb
->csum
= csum_partial(fcs
, ETH_FCS_LEN
+ 1, skb
->csum
);
1140 for (i
= 0; i
< ETH_FCS_LEN
; i
++)
1141 fcs
[i
] = ~skb
->data
[skb
->len
+ i
];
1142 skb
->csum
= csum_partial(fcs
, ETH_FCS_LEN
, skb
->csum
);
1144 skb
->ip_summed
= CHECKSUM_COMPLETE
;
1149 dev
->stats
.rx_packets
++;
1150 dev
->stats
.rx_bytes
+= len
;
1152 current_rx_ptr
->status
.status_word
= 0x00000000;
1153 current_rx_ptr
= current_rx_ptr
->next
;
1156 /* interrupt routine to handle rx and error signal */
1157 static irqreturn_t
bfin_mac_interrupt(int irq
, void *dev_id
)
1159 struct net_device
*dev
= dev_id
;
1163 if (current_rx_ptr
->status
.status_word
== 0) {
1164 /* no more new packet received */
1166 if (current_rx_ptr
->next
->status
.status_word
!= 0) {
1167 current_rx_ptr
= current_rx_ptr
->next
;
1171 bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() |
1172 DMA_DONE
| DMA_ERR
);
1179 goto get_one_packet
;
1182 #ifdef CONFIG_NET_POLL_CONTROLLER
1183 static void bfin_mac_poll(struct net_device
*dev
)
1185 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1187 disable_irq(IRQ_MAC_RX
);
1188 bfin_mac_interrupt(IRQ_MAC_RX
, dev
);
1190 enable_irq(IRQ_MAC_RX
);
1192 #endif /* CONFIG_NET_POLL_CONTROLLER */
1194 static void bfin_mac_disable(void)
1196 unsigned int opmode
;
1198 opmode
= bfin_read_EMAC_OPMODE();
1201 /* Turn off the EMAC */
1202 bfin_write_EMAC_OPMODE(opmode
);
1206 * Enable Interrupts, Receive, and Transmit
1208 static int bfin_mac_enable(void)
1213 pr_debug("%s: %s\n", DRV_NAME
, __func__
);
1216 bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head
->desc_a
));
1217 bfin_write_DMA1_CONFIG(rx_list_head
->desc_a
.config
);
1220 ret
= bfin_mdio_poll();
1224 /* We enable only RX here */
1225 /* ASTP : Enable Automatic Pad Stripping
1226 PR : Promiscuous Mode for test
1227 PSF : Receive frames with total length less than 64 bytes.
1228 FDMODE : Full Duplex Mode
1229 LB : Internal Loopback for test
1230 RE : Receiver Enable */
1231 opmode
= bfin_read_EMAC_OPMODE();
1232 if (opmode
& FDMODE
)
1235 opmode
|= DRO
| DC
| PSF
;
1238 #if defined(CONFIG_BFIN_MAC_RMII)
1239 opmode
|= RMII
; /* For Now only 100MBit are supported */
1240 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2
1244 /* Turn on the EMAC rx */
1245 bfin_write_EMAC_OPMODE(opmode
);
1250 /* Our watchdog timed out. Called by the networking layer */
1251 static void bfin_mac_timeout(struct net_device
*dev
)
1253 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1255 pr_debug("%s: %s\n", dev
->name
, __func__
);
1259 del_timer(&lp
->tx_reclaim_timer
);
1261 /* reset tx queue and free skb */
1262 while (tx_list_head
!= current_tx_ptr
) {
1263 tx_list_head
->desc_a
.config
&= ~DMAEN
;
1264 tx_list_head
->status
.status_word
= 0;
1265 if (tx_list_head
->skb
) {
1266 dev_kfree_skb(tx_list_head
->skb
);
1267 tx_list_head
->skb
= NULL
;
1269 tx_list_head
= tx_list_head
->next
;
1272 if (netif_queue_stopped(lp
->ndev
))
1273 netif_wake_queue(lp
->ndev
);
1277 /* We can accept TX packets again */
1278 dev
->trans_start
= jiffies
; /* prevent tx timeout */
1279 netif_wake_queue(dev
);
1282 static void bfin_mac_multicast_hash(struct net_device
*dev
)
1284 u32 emac_hashhi
, emac_hashlo
;
1285 struct netdev_hw_addr
*ha
;
1289 emac_hashhi
= emac_hashlo
= 0;
1291 netdev_for_each_mc_addr(ha
, dev
) {
1294 /* skip non-multicast addresses */
1298 crc
= ether_crc(ETH_ALEN
, addrs
);
1302 emac_hashhi
|= 1 << (crc
& 0x1f);
1304 emac_hashlo
|= 1 << (crc
& 0x1f);
1307 bfin_write_EMAC_HASHHI(emac_hashhi
);
1308 bfin_write_EMAC_HASHLO(emac_hashlo
);
1312 * This routine will, depending on the values passed to it,
1313 * either make it accept multicast packets, go into
1314 * promiscuous mode (for TCPDUMP and cousins) or accept
1315 * a select set of multicast packets
1317 static void bfin_mac_set_multicast_list(struct net_device
*dev
)
1321 if (dev
->flags
& IFF_PROMISC
) {
1322 printk(KERN_INFO
"%s: set to promisc mode\n", dev
->name
);
1323 sysctl
= bfin_read_EMAC_OPMODE();
1325 bfin_write_EMAC_OPMODE(sysctl
);
1326 } else if (dev
->flags
& IFF_ALLMULTI
) {
1327 /* accept all multicast */
1328 sysctl
= bfin_read_EMAC_OPMODE();
1330 bfin_write_EMAC_OPMODE(sysctl
);
1331 } else if (!netdev_mc_empty(dev
)) {
1332 /* set up multicast hash table */
1333 sysctl
= bfin_read_EMAC_OPMODE();
1335 bfin_write_EMAC_OPMODE(sysctl
);
1336 bfin_mac_multicast_hash(dev
);
1338 /* clear promisc or multicast mode */
1339 sysctl
= bfin_read_EMAC_OPMODE();
1340 sysctl
&= ~(RAF
| PAM
);
1341 bfin_write_EMAC_OPMODE(sysctl
);
1345 static int bfin_mac_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
1349 return bfin_mac_hwtstamp_ioctl(netdev
, ifr
, cmd
);
1356 * this puts the device in an inactive state
1358 static void bfin_mac_shutdown(struct net_device
*dev
)
1360 /* Turn off the EMAC */
1361 bfin_write_EMAC_OPMODE(0x00000000);
1362 /* Turn off the EMAC RX DMA */
1363 bfin_write_DMA1_CONFIG(0x0000);
1364 bfin_write_DMA2_CONFIG(0x0000);
1368 * Open and Initialize the interface
1370 * Set up everything, reset the card, etc..
1372 static int bfin_mac_open(struct net_device
*dev
)
1374 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1376 pr_debug("%s: %s\n", dev
->name
, __func__
);
1379 * Check that the address is valid. If its not, refuse
1380 * to bring the device up. The user must specify an
1381 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1383 if (!is_valid_ether_addr(dev
->dev_addr
)) {
1384 printk(KERN_WARNING DRV_NAME
": no valid ethernet hw addr\n");
1388 /* initial rx and tx list */
1389 ret
= desc_list_init();
1393 phy_start(lp
->phydev
);
1394 phy_write(lp
->phydev
, MII_BMCR
, BMCR_RESET
);
1395 setup_system_regs(dev
);
1396 setup_mac_addr(dev
->dev_addr
);
1399 ret
= bfin_mac_enable();
1402 pr_debug("hardware init finished\n");
1404 netif_start_queue(dev
);
1405 netif_carrier_on(dev
);
1411 * this makes the board clean up everything that it can
1412 * and not talk to the outside world. Caused by
1413 * an 'ifconfig ethX down'
1415 static int bfin_mac_close(struct net_device
*dev
)
1417 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1418 pr_debug("%s: %s\n", dev
->name
, __func__
);
1420 netif_stop_queue(dev
);
1421 netif_carrier_off(dev
);
1423 phy_stop(lp
->phydev
);
1424 phy_write(lp
->phydev
, MII_BMCR
, BMCR_PDOWN
);
1426 /* clear everything */
1427 bfin_mac_shutdown(dev
);
1429 /* free the rx/tx buffers */
1435 static const struct net_device_ops bfin_mac_netdev_ops
= {
1436 .ndo_open
= bfin_mac_open
,
1437 .ndo_stop
= bfin_mac_close
,
1438 .ndo_start_xmit
= bfin_mac_hard_start_xmit
,
1439 .ndo_set_mac_address
= bfin_mac_set_mac_address
,
1440 .ndo_tx_timeout
= bfin_mac_timeout
,
1441 .ndo_set_multicast_list
= bfin_mac_set_multicast_list
,
1442 .ndo_do_ioctl
= bfin_mac_ioctl
,
1443 .ndo_validate_addr
= eth_validate_addr
,
1444 .ndo_change_mtu
= eth_change_mtu
,
1445 #ifdef CONFIG_NET_POLL_CONTROLLER
1446 .ndo_poll_controller
= bfin_mac_poll
,
1450 static int __devinit
bfin_mac_probe(struct platform_device
*pdev
)
1452 struct net_device
*ndev
;
1453 struct bfin_mac_local
*lp
;
1454 struct platform_device
*pd
;
1457 ndev
= alloc_etherdev(sizeof(struct bfin_mac_local
));
1459 dev_err(&pdev
->dev
, "Cannot allocate net device!\n");
1463 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
1464 platform_set_drvdata(pdev
, ndev
);
1465 lp
= netdev_priv(ndev
);
1468 /* Grab the MAC address in the MAC */
1469 *(__le32
*) (&(ndev
->dev_addr
[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO());
1470 *(__le16
*) (&(ndev
->dev_addr
[4])) = cpu_to_le16((u16
) bfin_read_EMAC_ADDRHI());
1473 /*todo: how to proble? which is revision_register */
1474 bfin_write_EMAC_ADDRLO(0x12345678);
1475 if (bfin_read_EMAC_ADDRLO() != 0x12345678) {
1476 dev_err(&pdev
->dev
, "Cannot detect Blackfin on-chip ethernet MAC controller!\n");
1478 goto out_err_probe_mac
;
1483 * Is it valid? (Did bootloader initialize it?)
1484 * Grab the MAC from the board somehow
1485 * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c
1487 if (!is_valid_ether_addr(ndev
->dev_addr
))
1488 bfin_get_ether_addr(ndev
->dev_addr
);
1490 /* If still not valid, get a random one */
1491 if (!is_valid_ether_addr(ndev
->dev_addr
))
1492 random_ether_addr(ndev
->dev_addr
);
1494 setup_mac_addr(ndev
->dev_addr
);
1496 if (!pdev
->dev
.platform_data
) {
1497 dev_err(&pdev
->dev
, "Cannot get platform device bfin_mii_bus!\n");
1499 goto out_err_probe_mac
;
1501 pd
= pdev
->dev
.platform_data
;
1502 lp
->mii_bus
= platform_get_drvdata(pd
);
1504 dev_err(&pdev
->dev
, "Cannot get mii_bus!\n");
1506 goto out_err_mii_bus_probe
;
1508 lp
->mii_bus
->priv
= ndev
;
1510 rc
= mii_probe(ndev
);
1512 dev_err(&pdev
->dev
, "MII Probe failed!\n");
1513 goto out_err_mii_probe
;
1516 /* Fill in the fields of the device structure with ethernet values. */
1519 ndev
->netdev_ops
= &bfin_mac_netdev_ops
;
1520 ndev
->ethtool_ops
= &bfin_mac_ethtool_ops
;
1522 init_timer(&lp
->tx_reclaim_timer
);
1523 lp
->tx_reclaim_timer
.data
= (unsigned long)lp
;
1524 lp
->tx_reclaim_timer
.function
= tx_reclaim_skb_timeout
;
1526 spin_lock_init(&lp
->lock
);
1528 /* now, enable interrupts */
1529 /* register irq handler */
1530 rc
= request_irq(IRQ_MAC_RX
, bfin_mac_interrupt
,
1531 IRQF_DISABLED
, "EMAC_RX", ndev
);
1533 dev_err(&pdev
->dev
, "Cannot request Blackfin MAC RX IRQ!\n");
1535 goto out_err_request_irq
;
1538 rc
= register_netdev(ndev
);
1540 dev_err(&pdev
->dev
, "Cannot register net device!\n");
1541 goto out_err_reg_ndev
;
1544 bfin_mac_hwtstamp_init(ndev
);
1546 /* now, print out the card info, in a short format.. */
1547 dev_info(&pdev
->dev
, "%s, Version %s\n", DRV_DESC
, DRV_VERSION
);
1552 free_irq(IRQ_MAC_RX
, ndev
);
1553 out_err_request_irq
:
1555 mdiobus_unregister(lp
->mii_bus
);
1556 mdiobus_free(lp
->mii_bus
);
1557 out_err_mii_bus_probe
:
1558 peripheral_free_list(pin_req
);
1560 platform_set_drvdata(pdev
, NULL
);
1566 static int __devexit
bfin_mac_remove(struct platform_device
*pdev
)
1568 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1569 struct bfin_mac_local
*lp
= netdev_priv(ndev
);
1571 platform_set_drvdata(pdev
, NULL
);
1573 lp
->mii_bus
->priv
= NULL
;
1575 unregister_netdev(ndev
);
1577 free_irq(IRQ_MAC_RX
, ndev
);
1581 peripheral_free_list(pin_req
);
1587 static int bfin_mac_suspend(struct platform_device
*pdev
, pm_message_t mesg
)
1589 struct net_device
*net_dev
= platform_get_drvdata(pdev
);
1590 struct bfin_mac_local
*lp
= netdev_priv(net_dev
);
1593 bfin_write_EMAC_OPMODE((bfin_read_EMAC_OPMODE() & ~TE
) | RE
);
1594 bfin_write_EMAC_WKUP_CTL(MPKE
);
1595 enable_irq_wake(IRQ_MAC_WAKEDET
);
1597 if (netif_running(net_dev
))
1598 bfin_mac_close(net_dev
);
1604 static int bfin_mac_resume(struct platform_device
*pdev
)
1606 struct net_device
*net_dev
= platform_get_drvdata(pdev
);
1607 struct bfin_mac_local
*lp
= netdev_priv(net_dev
);
1610 bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE
);
1611 bfin_write_EMAC_WKUP_CTL(0);
1612 disable_irq_wake(IRQ_MAC_WAKEDET
);
1614 if (netif_running(net_dev
))
1615 bfin_mac_open(net_dev
);
1621 #define bfin_mac_suspend NULL
1622 #define bfin_mac_resume NULL
1623 #endif /* CONFIG_PM */
1625 static int __devinit
bfin_mii_bus_probe(struct platform_device
*pdev
)
1627 struct mii_bus
*miibus
;
1631 * We are setting up a network card,
1632 * so set the GPIO pins to Ethernet mode
1634 rc
= peripheral_request_list(pin_req
, DRV_NAME
);
1636 dev_err(&pdev
->dev
, "Requesting peripherals failed!\n");
1641 miibus
= mdiobus_alloc();
1644 miibus
->read
= bfin_mdiobus_read
;
1645 miibus
->write
= bfin_mdiobus_write
;
1646 miibus
->reset
= bfin_mdiobus_reset
;
1648 miibus
->parent
= &pdev
->dev
;
1649 miibus
->name
= "bfin_mii_bus";
1650 snprintf(miibus
->id
, MII_BUS_ID_SIZE
, "0");
1651 miibus
->irq
= kmalloc(sizeof(int)*PHY_MAX_ADDR
, GFP_KERNEL
);
1652 if (miibus
->irq
== NULL
)
1654 for (i
= 0; i
< PHY_MAX_ADDR
; ++i
)
1655 miibus
->irq
[i
] = PHY_POLL
;
1657 rc
= mdiobus_register(miibus
);
1659 dev_err(&pdev
->dev
, "Cannot register MDIO bus!\n");
1660 goto out_err_mdiobus_register
;
1663 platform_set_drvdata(pdev
, miibus
);
1666 out_err_mdiobus_register
:
1668 mdiobus_free(miibus
);
1670 peripheral_free_list(pin_req
);
1675 static int __devexit
bfin_mii_bus_remove(struct platform_device
*pdev
)
1677 struct mii_bus
*miibus
= platform_get_drvdata(pdev
);
1678 platform_set_drvdata(pdev
, NULL
);
1679 mdiobus_unregister(miibus
);
1681 mdiobus_free(miibus
);
1682 peripheral_free_list(pin_req
);
1686 static struct platform_driver bfin_mii_bus_driver
= {
1687 .probe
= bfin_mii_bus_probe
,
1688 .remove
= __devexit_p(bfin_mii_bus_remove
),
1690 .name
= "bfin_mii_bus",
1691 .owner
= THIS_MODULE
,
1695 static struct platform_driver bfin_mac_driver
= {
1696 .probe
= bfin_mac_probe
,
1697 .remove
= __devexit_p(bfin_mac_remove
),
1698 .resume
= bfin_mac_resume
,
1699 .suspend
= bfin_mac_suspend
,
1702 .owner
= THIS_MODULE
,
1706 static int __init
bfin_mac_init(void)
1709 ret
= platform_driver_register(&bfin_mii_bus_driver
);
1711 return platform_driver_register(&bfin_mac_driver
);
1715 module_init(bfin_mac_init
);
1717 static void __exit
bfin_mac_cleanup(void)
1719 platform_driver_unregister(&bfin_mac_driver
);
1720 platform_driver_unregister(&bfin_mii_bus_driver
);
1723 module_exit(bfin_mac_cleanup
);