2 * Blackfin On-Chip MAC Driver
4 * Copyright 2004-2010 Analog Devices Inc.
6 * Enter bugs at http://blackfin.uclinux.org/
8 * Licensed under the GPL-2 or later.
11 #define DRV_VERSION "1.1"
12 #define DRV_DESC "Blackfin on-chip Ethernet MAC driver"
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
21 #include <linux/delay.h>
22 #include <linux/timer.h>
23 #include <linux/errno.h>
24 #include <linux/irq.h>
26 #include <linux/ioport.h>
27 #include <linux/crc32.h>
28 #include <linux/device.h>
29 #include <linux/spinlock.h>
30 #include <linux/mii.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/ethtool.h>
34 #include <linux/skbuff.h>
35 #include <linux/platform_device.h>
38 #include <linux/dma-mapping.h>
40 #include <asm/div64.h>
42 #include <asm/blackfin.h>
43 #include <asm/cacheflush.h>
44 #include <asm/portmux.h>
49 MODULE_AUTHOR("Bryan Wu, Luke Yang");
50 MODULE_LICENSE("GPL");
51 MODULE_DESCRIPTION(DRV_DESC
);
52 MODULE_ALIAS("platform:bfin_mac");
54 #if defined(CONFIG_BFIN_MAC_USE_L1)
55 # define bfin_mac_alloc(dma_handle, size, num) l1_data_sram_zalloc(size*num)
56 # define bfin_mac_free(dma_handle, ptr, num) l1_data_sram_free(ptr)
58 # define bfin_mac_alloc(dma_handle, size, num) \
59 dma_alloc_coherent(NULL, size*num, dma_handle, GFP_KERNEL)
60 # define bfin_mac_free(dma_handle, ptr, num) \
61 dma_free_coherent(NULL, sizeof(*ptr)*num, ptr, dma_handle)
64 #define PKT_BUF_SZ 1580
66 #define MAX_TIMEOUT_CNT 500
68 /* pointers to maintain transmit list */
69 static struct net_dma_desc_tx
*tx_list_head
;
70 static struct net_dma_desc_tx
*tx_list_tail
;
71 static struct net_dma_desc_rx
*rx_list_head
;
72 static struct net_dma_desc_rx
*rx_list_tail
;
73 static struct net_dma_desc_rx
*current_rx_ptr
;
74 static struct net_dma_desc_tx
*current_tx_ptr
;
75 static struct net_dma_desc_tx
*tx_desc
;
76 static struct net_dma_desc_rx
*rx_desc
;
78 static void desc_list_free(void)
80 struct net_dma_desc_rx
*r
;
81 struct net_dma_desc_tx
*t
;
83 #if !defined(CONFIG_BFIN_MAC_USE_L1)
84 dma_addr_t dma_handle
= 0;
89 for (i
= 0; i
< CONFIG_BFIN_TX_DESC_NUM
; i
++) {
92 dev_kfree_skb(t
->skb
);
98 bfin_mac_free(dma_handle
, tx_desc
, CONFIG_BFIN_TX_DESC_NUM
);
103 for (i
= 0; i
< CONFIG_BFIN_RX_DESC_NUM
; i
++) {
106 dev_kfree_skb(r
->skb
);
112 bfin_mac_free(dma_handle
, rx_desc
, CONFIG_BFIN_RX_DESC_NUM
);
116 static int desc_list_init(struct net_device
*dev
)
119 struct sk_buff
*new_skb
;
120 #if !defined(CONFIG_BFIN_MAC_USE_L1)
122 * This dma_handle is useless in Blackfin dma_alloc_coherent().
123 * The real dma handler is the return value of dma_alloc_coherent().
125 dma_addr_t dma_handle
;
128 tx_desc
= bfin_mac_alloc(&dma_handle
,
129 sizeof(struct net_dma_desc_tx
),
130 CONFIG_BFIN_TX_DESC_NUM
);
134 rx_desc
= bfin_mac_alloc(&dma_handle
,
135 sizeof(struct net_dma_desc_rx
),
136 CONFIG_BFIN_RX_DESC_NUM
);
141 tx_list_head
= tx_list_tail
= tx_desc
;
143 for (i
= 0; i
< CONFIG_BFIN_TX_DESC_NUM
; i
++) {
144 struct net_dma_desc_tx
*t
= tx_desc
+ i
;
145 struct dma_descriptor
*a
= &(t
->desc_a
);
146 struct dma_descriptor
*b
= &(t
->desc_b
);
150 * read from memory WNR = 0
151 * wordsize is 32 bits
152 * 6 half words is desc size
155 a
->config
= WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
156 a
->start_addr
= (unsigned long)t
->packet
;
158 a
->next_dma_desc
= b
;
162 * write to memory WNR = 1
163 * wordsize is 32 bits
165 * 6 half words is desc size
168 b
->config
= DMAEN
| WNR
| WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
169 b
->start_addr
= (unsigned long)(&(t
->status
));
173 tx_list_tail
->desc_b
.next_dma_desc
= a
;
174 tx_list_tail
->next
= t
;
177 tx_list_tail
->next
= tx_list_head
; /* tx_list is a circle */
178 tx_list_tail
->desc_b
.next_dma_desc
= &(tx_list_head
->desc_a
);
179 current_tx_ptr
= tx_list_head
;
182 rx_list_head
= rx_list_tail
= rx_desc
;
184 for (i
= 0; i
< CONFIG_BFIN_RX_DESC_NUM
; i
++) {
185 struct net_dma_desc_rx
*r
= rx_desc
+ i
;
186 struct dma_descriptor
*a
= &(r
->desc_a
);
187 struct dma_descriptor
*b
= &(r
->desc_b
);
189 /* allocate a new skb for next time receive */
190 new_skb
= netdev_alloc_skb(dev
, PKT_BUF_SZ
+ NET_IP_ALIGN
);
194 skb_reserve(new_skb
, NET_IP_ALIGN
);
195 /* Invidate the data cache of skb->data range when it is write back
196 * cache. It will prevent overwritting the new data from DMA
198 blackfin_dcache_invalidate_range((unsigned long)new_skb
->head
,
199 (unsigned long)new_skb
->end
);
204 * write to memory WNR = 1
205 * wordsize is 32 bits
207 * 6 half words is desc size
210 a
->config
= DMAEN
| WNR
| WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
211 /* since RXDWA is enabled */
212 a
->start_addr
= (unsigned long)new_skb
->data
- 2;
214 a
->next_dma_desc
= b
;
218 * write to memory WNR = 1
219 * wordsize is 32 bits
221 * 6 half words is desc size
224 b
->config
= DMAEN
| WNR
| WDSIZE_32
| DI_EN
|
225 NDSIZE_6
| DMAFLOW_LARGE
;
226 b
->start_addr
= (unsigned long)(&(r
->status
));
229 rx_list_tail
->desc_b
.next_dma_desc
= a
;
230 rx_list_tail
->next
= r
;
233 rx_list_tail
->next
= rx_list_head
; /* rx_list is a circle */
234 rx_list_tail
->desc_b
.next_dma_desc
= &(rx_list_head
->desc_a
);
235 current_rx_ptr
= rx_list_head
;
241 pr_err("kmalloc failed\n");
246 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
251 /* Wait until the previous MDC/MDIO transaction has completed */
252 static int bfin_mdio_poll(void)
254 int timeout_cnt
= MAX_TIMEOUT_CNT
;
256 /* poll the STABUSY bit */
257 while ((bfin_read_EMAC_STAADD()) & STABUSY
) {
259 if (timeout_cnt
-- < 0) {
260 pr_err("wait MDC/MDIO transaction to complete timeout\n");
268 /* Read an off-chip register in a PHY through the MDC/MDIO port */
269 static int bfin_mdiobus_read(struct mii_bus
*bus
, int phy_addr
, int regnum
)
273 ret
= bfin_mdio_poll();
278 bfin_write_EMAC_STAADD(SET_PHYAD((u16
) phy_addr
) |
279 SET_REGAD((u16
) regnum
) |
282 ret
= bfin_mdio_poll();
286 return (int) bfin_read_EMAC_STADAT();
289 /* Write an off-chip register in a PHY through the MDC/MDIO port */
290 static int bfin_mdiobus_write(struct mii_bus
*bus
, int phy_addr
, int regnum
,
295 ret
= bfin_mdio_poll();
299 bfin_write_EMAC_STADAT((u32
) value
);
302 bfin_write_EMAC_STAADD(SET_PHYAD((u16
) phy_addr
) |
303 SET_REGAD((u16
) regnum
) |
307 return bfin_mdio_poll();
310 static int bfin_mdiobus_reset(struct mii_bus
*bus
)
315 static void bfin_mac_adjust_link(struct net_device
*dev
)
317 struct bfin_mac_local
*lp
= netdev_priv(dev
);
318 struct phy_device
*phydev
= lp
->phydev
;
322 spin_lock_irqsave(&lp
->lock
, flags
);
324 /* Now we make sure that we can be in full duplex mode.
325 * If not, we operate in half-duplex mode. */
326 if (phydev
->duplex
!= lp
->old_duplex
) {
327 u32 opmode
= bfin_read_EMAC_OPMODE();
335 bfin_write_EMAC_OPMODE(opmode
);
336 lp
->old_duplex
= phydev
->duplex
;
339 if (phydev
->speed
!= lp
->old_speed
) {
340 if (phydev
->interface
== PHY_INTERFACE_MODE_RMII
) {
341 u32 opmode
= bfin_read_EMAC_OPMODE();
342 switch (phydev
->speed
) {
351 "Ack! Speed (%d) is not 10/100!\n",
355 bfin_write_EMAC_OPMODE(opmode
);
359 lp
->old_speed
= phydev
->speed
;
366 } else if (lp
->old_link
) {
374 u32 opmode
= bfin_read_EMAC_OPMODE();
375 phy_print_status(phydev
);
376 pr_debug("EMAC_OPMODE = 0x%08x\n", opmode
);
379 spin_unlock_irqrestore(&lp
->lock
, flags
);
383 #define MDC_CLK 2500000
385 static int mii_probe(struct net_device
*dev
, int phy_mode
)
387 struct bfin_mac_local
*lp
= netdev_priv(dev
);
388 struct phy_device
*phydev
= NULL
;
389 unsigned short sysctl
;
393 /* Enable PHY output early */
394 if (!(bfin_read_VR_CTL() & CLKBUFOE
))
395 bfin_write_VR_CTL(bfin_read_VR_CTL() | CLKBUFOE
);
398 mdc_div
= ((sclk
/ MDC_CLK
) / 2) - 1;
400 sysctl
= bfin_read_EMAC_SYSCTL();
401 sysctl
= (sysctl
& ~MDCDIV
) | SET_MDCDIV(mdc_div
);
402 bfin_write_EMAC_SYSCTL(sysctl
);
404 /* search for connected PHY device */
405 for (i
= 0; i
< PHY_MAX_ADDR
; ++i
) {
406 struct phy_device
*const tmp_phydev
= lp
->mii_bus
->phy_map
[i
];
409 continue; /* no PHY here... */
412 break; /* found it */
415 /* now we are supposed to have a proper phydev, to attach to... */
417 netdev_err(dev
, "no phy device found\n");
421 if (phy_mode
!= PHY_INTERFACE_MODE_RMII
&&
422 phy_mode
!= PHY_INTERFACE_MODE_MII
) {
423 netdev_err(dev
, "invalid phy interface mode\n");
427 phydev
= phy_connect(dev
, dev_name(&phydev
->dev
),
428 &bfin_mac_adjust_link
, phy_mode
);
430 if (IS_ERR(phydev
)) {
431 netdev_err(dev
, "could not attach PHY\n");
432 return PTR_ERR(phydev
);
435 /* mask with MAC supported features */
436 phydev
->supported
&= (SUPPORTED_10baseT_Half
437 | SUPPORTED_10baseT_Full
438 | SUPPORTED_100baseT_Half
439 | SUPPORTED_100baseT_Full
441 | SUPPORTED_Pause
| SUPPORTED_Asym_Pause
445 phydev
->advertising
= phydev
->supported
;
452 pr_info("attached PHY driver [%s] "
453 "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)@sclk=%dMHz)\n",
454 phydev
->drv
->name
, dev_name(&phydev
->dev
), phydev
->irq
,
455 MDC_CLK
, mdc_div
, sclk
/1000000);
465 * interrupt routine for magic packet wakeup
467 static irqreturn_t
bfin_mac_wake_interrupt(int irq
, void *dev_id
)
473 bfin_mac_ethtool_getsettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
475 struct bfin_mac_local
*lp
= netdev_priv(dev
);
478 return phy_ethtool_gset(lp
->phydev
, cmd
);
484 bfin_mac_ethtool_setsettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
486 struct bfin_mac_local
*lp
= netdev_priv(dev
);
488 if (!capable(CAP_NET_ADMIN
))
492 return phy_ethtool_sset(lp
->phydev
, cmd
);
497 static void bfin_mac_ethtool_getdrvinfo(struct net_device
*dev
,
498 struct ethtool_drvinfo
*info
)
500 strlcpy(info
->driver
, KBUILD_MODNAME
, sizeof(info
->driver
));
501 strlcpy(info
->version
, DRV_VERSION
, sizeof(info
->version
));
502 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
503 strlcpy(info
->bus_info
, dev_name(&dev
->dev
), sizeof(info
->bus_info
));
506 static void bfin_mac_ethtool_getwol(struct net_device
*dev
,
507 struct ethtool_wolinfo
*wolinfo
)
509 struct bfin_mac_local
*lp
= netdev_priv(dev
);
511 wolinfo
->supported
= WAKE_MAGIC
;
512 wolinfo
->wolopts
= lp
->wol
;
515 static int bfin_mac_ethtool_setwol(struct net_device
*dev
,
516 struct ethtool_wolinfo
*wolinfo
)
518 struct bfin_mac_local
*lp
= netdev_priv(dev
);
521 if (wolinfo
->wolopts
& (WAKE_MAGICSECURE
|
528 lp
->wol
= wolinfo
->wolopts
;
530 if (lp
->wol
&& !lp
->irq_wake_requested
) {
531 /* register wake irq handler */
532 rc
= request_irq(IRQ_MAC_WAKEDET
, bfin_mac_wake_interrupt
,
533 IRQF_DISABLED
, "EMAC_WAKE", dev
);
536 lp
->irq_wake_requested
= true;
539 if (!lp
->wol
&& lp
->irq_wake_requested
) {
540 free_irq(IRQ_MAC_WAKEDET
, dev
);
541 lp
->irq_wake_requested
= false;
544 /* Make sure the PHY driver doesn't suspend */
545 device_init_wakeup(&dev
->dev
, lp
->wol
);
550 #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP
551 static int bfin_mac_ethtool_get_ts_info(struct net_device
*dev
,
552 struct ethtool_ts_info
*info
)
554 struct bfin_mac_local
*lp
= netdev_priv(dev
);
556 info
->so_timestamping
=
557 SOF_TIMESTAMPING_TX_HARDWARE
|
558 SOF_TIMESTAMPING_RX_HARDWARE
|
559 SOF_TIMESTAMPING_RAW_HARDWARE
;
560 info
->phc_index
= lp
->phc_index
;
562 (1 << HWTSTAMP_TX_OFF
) |
563 (1 << HWTSTAMP_TX_ON
);
565 (1 << HWTSTAMP_FILTER_NONE
) |
566 (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT
) |
567 (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT
) |
568 (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT
);
573 static const struct ethtool_ops bfin_mac_ethtool_ops
= {
574 .get_settings
= bfin_mac_ethtool_getsettings
,
575 .set_settings
= bfin_mac_ethtool_setsettings
,
576 .get_link
= ethtool_op_get_link
,
577 .get_drvinfo
= bfin_mac_ethtool_getdrvinfo
,
578 .get_wol
= bfin_mac_ethtool_getwol
,
579 .set_wol
= bfin_mac_ethtool_setwol
,
580 #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP
581 .get_ts_info
= bfin_mac_ethtool_get_ts_info
,
585 /**************************************************************************/
586 static void setup_system_regs(struct net_device
*dev
)
588 struct bfin_mac_local
*lp
= netdev_priv(dev
);
590 unsigned short sysctl
;
593 * Odd word alignment for Receive Frame DMA word
594 * Configure checksum support and rcve frame word alignment
596 sysctl
= bfin_read_EMAC_SYSCTL();
598 * check if interrupt is requested for any PHY,
599 * enable PHY interrupt only if needed
601 for (i
= 0; i
< PHY_MAX_ADDR
; ++i
)
602 if (lp
->mii_bus
->irq
[i
] != PHY_POLL
)
604 if (i
< PHY_MAX_ADDR
)
607 #if defined(BFIN_MAC_CSUM_OFFLOAD)
612 bfin_write_EMAC_SYSCTL(sysctl
);
614 bfin_write_EMAC_MMC_CTL(RSTC
| CROLL
);
616 /* Set vlan regs to let 1522 bytes long packets pass through */
617 bfin_write_EMAC_VLAN1(lp
->vlan1_mask
);
618 bfin_write_EMAC_VLAN2(lp
->vlan2_mask
);
620 /* Initialize the TX DMA channel registers */
621 bfin_write_DMA2_X_COUNT(0);
622 bfin_write_DMA2_X_MODIFY(4);
623 bfin_write_DMA2_Y_COUNT(0);
624 bfin_write_DMA2_Y_MODIFY(0);
626 /* Initialize the RX DMA channel registers */
627 bfin_write_DMA1_X_COUNT(0);
628 bfin_write_DMA1_X_MODIFY(4);
629 bfin_write_DMA1_Y_COUNT(0);
630 bfin_write_DMA1_Y_MODIFY(0);
633 static void setup_mac_addr(u8
*mac_addr
)
635 u32 addr_low
= le32_to_cpu(*(__le32
*) & mac_addr
[0]);
636 u16 addr_hi
= le16_to_cpu(*(__le16
*) & mac_addr
[4]);
638 /* this depends on a little-endian machine */
639 bfin_write_EMAC_ADDRLO(addr_low
);
640 bfin_write_EMAC_ADDRHI(addr_hi
);
643 static int bfin_mac_set_mac_address(struct net_device
*dev
, void *p
)
645 struct sockaddr
*addr
= p
;
646 if (netif_running(dev
))
648 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
649 setup_mac_addr(dev
->dev_addr
);
653 #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP
654 #define bfin_mac_hwtstamp_is_none(cfg) ((cfg) == HWTSTAMP_FILTER_NONE)
656 static u32
bfin_select_phc_clock(u32 input_clk
, unsigned int *shift_result
)
658 u32 ipn
= 1000000000UL / input_clk
;
660 unsigned int shift
= 0;
666 *shift_result
= shift
;
667 return 1000000000UL / ppn
;
670 static int bfin_mac_hwtstamp_ioctl(struct net_device
*netdev
,
671 struct ifreq
*ifr
, int cmd
)
673 struct hwtstamp_config config
;
674 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
676 u32 ptpfv1
, ptpfv2
, ptpfv3
, ptpfoff
;
678 if (copy_from_user(&config
, ifr
->ifr_data
, sizeof(config
)))
681 pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
682 __func__
, config
.flags
, config
.tx_type
, config
.rx_filter
);
684 /* reserved for future extensions */
688 if ((config
.tx_type
!= HWTSTAMP_TX_OFF
) &&
689 (config
.tx_type
!= HWTSTAMP_TX_ON
))
692 ptpctl
= bfin_read_EMAC_PTP_CTL();
694 switch (config
.rx_filter
) {
695 case HWTSTAMP_FILTER_NONE
:
697 * Dont allow any timestamping
700 bfin_write_EMAC_PTP_FV3(ptpfv3
);
702 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT
:
703 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC
:
704 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ
:
706 * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL)
707 * to enable all the field matches.
710 bfin_write_EMAC_PTP_CTL(ptpctl
);
712 * Keep the default values of the EMAC_PTP_FOFF register.
714 ptpfoff
= 0x4A24170C;
715 bfin_write_EMAC_PTP_FOFF(ptpfoff
);
717 * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2
721 bfin_write_EMAC_PTP_FV1(ptpfv1
);
723 bfin_write_EMAC_PTP_FV2(ptpfv2
);
725 * The default value (0xFFFC) allows the timestamping of both
726 * received Sync messages and Delay_Req messages.
729 bfin_write_EMAC_PTP_FV3(ptpfv3
);
731 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V1_L4_EVENT
;
733 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT
:
734 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC
:
735 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ
:
736 /* Clear all five comparison mask bits (bits[12:8]) in the
737 * EMAC_PTP_CTL register to enable all the field matches.
740 bfin_write_EMAC_PTP_CTL(ptpctl
);
742 * Keep the default values of the EMAC_PTP_FOFF register, except set
743 * the PTPCOF field to 0x2A.
745 ptpfoff
= 0x2A24170C;
746 bfin_write_EMAC_PTP_FOFF(ptpfoff
);
748 * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2
752 bfin_write_EMAC_PTP_FV1(ptpfv1
);
754 bfin_write_EMAC_PTP_FV2(ptpfv2
);
756 * To allow the timestamping of Pdelay_Req and Pdelay_Resp, set
757 * the value to 0xFFF0.
760 bfin_write_EMAC_PTP_FV3(ptpfv3
);
762 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_L4_EVENT
;
764 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT
:
765 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC
:
766 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ
:
768 * Clear bits 8 and 12 of the EMAC_PTP_CTL register to enable only the
769 * EFTM and PTPCM field comparison.
772 bfin_write_EMAC_PTP_CTL(ptpctl
);
774 * Keep the default values of all the fields of the EMAC_PTP_FOFF
775 * register, except set the PTPCOF field to 0x0E.
777 ptpfoff
= 0x0E24170C;
778 bfin_write_EMAC_PTP_FOFF(ptpfoff
);
780 * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which
781 * corresponds to PTP messages on the MAC layer.
784 bfin_write_EMAC_PTP_FV1(ptpfv1
);
786 bfin_write_EMAC_PTP_FV2(ptpfv2
);
788 * To allow the timestamping of Pdelay_Req and Pdelay_Resp
789 * messages, set the value to 0xFFF0.
792 bfin_write_EMAC_PTP_FV3(ptpfv3
);
794 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_L2_EVENT
;
800 if (config
.tx_type
== HWTSTAMP_TX_OFF
&&
801 bfin_mac_hwtstamp_is_none(config
.rx_filter
)) {
803 bfin_write_EMAC_PTP_CTL(ptpctl
);
808 bfin_write_EMAC_PTP_CTL(ptpctl
);
811 * clear any existing timestamp
813 bfin_read_EMAC_PTP_RXSNAPLO();
814 bfin_read_EMAC_PTP_RXSNAPHI();
816 bfin_read_EMAC_PTP_TXSNAPLO();
817 bfin_read_EMAC_PTP_TXSNAPHI();
822 lp
->stamp_cfg
= config
;
823 return copy_to_user(ifr
->ifr_data
, &config
, sizeof(config
)) ?
827 static void bfin_tx_hwtstamp(struct net_device
*netdev
, struct sk_buff
*skb
)
829 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
831 if (skb_shinfo(skb
)->tx_flags
& SKBTX_HW_TSTAMP
) {
832 int timeout_cnt
= MAX_TIMEOUT_CNT
;
834 /* When doing time stamping, keep the connection to the socket
837 skb_shinfo(skb
)->tx_flags
|= SKBTX_IN_PROGRESS
;
840 * The timestamping is done at the EMAC module's MII/RMII interface
841 * when the module sees the Start of Frame of an event message packet. This
842 * interface is the closest possible place to the physical Ethernet transmission
843 * medium, providing the best timing accuracy.
845 while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL
)) && (--timeout_cnt
))
847 if (timeout_cnt
== 0)
848 netdev_err(netdev
, "timestamp the TX packet failed\n");
850 struct skb_shared_hwtstamps shhwtstamps
;
854 regval
= bfin_read_EMAC_PTP_TXSNAPLO();
855 regval
|= (u64
)bfin_read_EMAC_PTP_TXSNAPHI() << 32;
856 memset(&shhwtstamps
, 0, sizeof(shhwtstamps
));
857 ns
= regval
<< lp
->shift
;
858 shhwtstamps
.hwtstamp
= ns_to_ktime(ns
);
859 skb_tstamp_tx(skb
, &shhwtstamps
);
864 static void bfin_rx_hwtstamp(struct net_device
*netdev
, struct sk_buff
*skb
)
866 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
869 struct skb_shared_hwtstamps
*shhwtstamps
;
871 if (bfin_mac_hwtstamp_is_none(lp
->stamp_cfg
.rx_filter
))
874 valid
= bfin_read_EMAC_PTP_ISTAT() & RXEL
;
878 shhwtstamps
= skb_hwtstamps(skb
);
880 regval
= bfin_read_EMAC_PTP_RXSNAPLO();
881 regval
|= (u64
)bfin_read_EMAC_PTP_RXSNAPHI() << 32;
882 ns
= regval
<< lp
->shift
;
883 memset(shhwtstamps
, 0, sizeof(*shhwtstamps
));
884 shhwtstamps
->hwtstamp
= ns_to_ktime(ns
);
887 static void bfin_mac_hwtstamp_init(struct net_device
*netdev
)
889 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
891 u32 input_clk
, phc_clk
;
893 /* Initialize hardware timer */
894 input_clk
= get_sclk();
895 phc_clk
= bfin_select_phc_clock(input_clk
, &lp
->shift
);
896 addend
= phc_clk
* (1ULL << 32);
897 do_div(addend
, input_clk
);
898 bfin_write_EMAC_PTP_ADDEND((u32
)addend
);
901 ppb
= 1000000000ULL * input_clk
;
902 do_div(ppb
, phc_clk
);
903 lp
->max_ppb
= ppb
- 1000000000ULL - 1ULL;
905 /* Initialize hwstamp config */
906 lp
->stamp_cfg
.rx_filter
= HWTSTAMP_FILTER_NONE
;
907 lp
->stamp_cfg
.tx_type
= HWTSTAMP_TX_OFF
;
910 static u64
bfin_ptp_time_read(struct bfin_mac_local
*lp
)
915 lo
= bfin_read_EMAC_PTP_TIMELO();
916 hi
= bfin_read_EMAC_PTP_TIMEHI();
918 ns
= ((u64
) hi
) << 32;
925 static void bfin_ptp_time_write(struct bfin_mac_local
*lp
, u64 ns
)
931 lo
= ns
& 0xffffffff;
933 bfin_write_EMAC_PTP_TIMELO(lo
);
934 bfin_write_EMAC_PTP_TIMEHI(hi
);
937 /* PTP Hardware Clock operations */
939 static int bfin_ptp_adjfreq(struct ptp_clock_info
*ptp
, s32 ppb
)
944 struct bfin_mac_local
*lp
=
945 container_of(ptp
, struct bfin_mac_local
, caps
);
954 diff
= div_u64(adj
, 1000000000ULL);
956 addend
= neg_adj
? addend
- diff
: addend
+ diff
;
958 bfin_write_EMAC_PTP_ADDEND(addend
);
963 static int bfin_ptp_adjtime(struct ptp_clock_info
*ptp
, s64 delta
)
967 struct bfin_mac_local
*lp
=
968 container_of(ptp
, struct bfin_mac_local
, caps
);
970 spin_lock_irqsave(&lp
->phc_lock
, flags
);
972 now
= bfin_ptp_time_read(lp
);
974 bfin_ptp_time_write(lp
, now
);
976 spin_unlock_irqrestore(&lp
->phc_lock
, flags
);
981 static int bfin_ptp_gettime(struct ptp_clock_info
*ptp
, struct timespec
*ts
)
986 struct bfin_mac_local
*lp
=
987 container_of(ptp
, struct bfin_mac_local
, caps
);
989 spin_lock_irqsave(&lp
->phc_lock
, flags
);
991 ns
= bfin_ptp_time_read(lp
);
993 spin_unlock_irqrestore(&lp
->phc_lock
, flags
);
995 ts
->tv_sec
= div_u64_rem(ns
, 1000000000, &remainder
);
996 ts
->tv_nsec
= remainder
;
1000 static int bfin_ptp_settime(struct ptp_clock_info
*ptp
,
1001 const struct timespec
*ts
)
1004 unsigned long flags
;
1005 struct bfin_mac_local
*lp
=
1006 container_of(ptp
, struct bfin_mac_local
, caps
);
1008 ns
= ts
->tv_sec
* 1000000000ULL;
1011 spin_lock_irqsave(&lp
->phc_lock
, flags
);
1013 bfin_ptp_time_write(lp
, ns
);
1015 spin_unlock_irqrestore(&lp
->phc_lock
, flags
);
1020 static int bfin_ptp_enable(struct ptp_clock_info
*ptp
,
1021 struct ptp_clock_request
*rq
, int on
)
1026 static struct ptp_clock_info bfin_ptp_caps
= {
1027 .owner
= THIS_MODULE
,
1028 .name
= "BF518 clock",
1034 .adjfreq
= bfin_ptp_adjfreq
,
1035 .adjtime
= bfin_ptp_adjtime
,
1036 .gettime
= bfin_ptp_gettime
,
1037 .settime
= bfin_ptp_settime
,
1038 .enable
= bfin_ptp_enable
,
1041 static int bfin_phc_init(struct net_device
*netdev
, struct device
*dev
)
1043 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
1045 lp
->caps
= bfin_ptp_caps
;
1046 lp
->caps
.max_adj
= lp
->max_ppb
;
1047 lp
->clock
= ptp_clock_register(&lp
->caps
, dev
);
1048 if (IS_ERR(lp
->clock
))
1049 return PTR_ERR(lp
->clock
);
1051 lp
->phc_index
= ptp_clock_index(lp
->clock
);
1052 spin_lock_init(&lp
->phc_lock
);
1057 static void bfin_phc_release(struct bfin_mac_local
*lp
)
1059 ptp_clock_unregister(lp
->clock
);
1063 # define bfin_mac_hwtstamp_is_none(cfg) 0
1064 # define bfin_mac_hwtstamp_init(dev)
1065 # define bfin_mac_hwtstamp_ioctl(dev, ifr, cmd) (-EOPNOTSUPP)
1066 # define bfin_rx_hwtstamp(dev, skb)
1067 # define bfin_tx_hwtstamp(dev, skb)
1068 # define bfin_phc_init(netdev, dev) 0
1069 # define bfin_phc_release(lp)
1072 static inline void _tx_reclaim_skb(void)
1075 tx_list_head
->desc_a
.config
&= ~DMAEN
;
1076 tx_list_head
->status
.status_word
= 0;
1077 if (tx_list_head
->skb
) {
1078 dev_kfree_skb(tx_list_head
->skb
);
1079 tx_list_head
->skb
= NULL
;
1081 tx_list_head
= tx_list_head
->next
;
1083 } while (tx_list_head
->status
.status_word
!= 0);
1086 static void tx_reclaim_skb(struct bfin_mac_local
*lp
)
1088 int timeout_cnt
= MAX_TIMEOUT_CNT
;
1090 if (tx_list_head
->status
.status_word
!= 0)
1093 if (current_tx_ptr
->next
== tx_list_head
) {
1094 while (tx_list_head
->status
.status_word
== 0) {
1095 /* slow down polling to avoid too many queue stop. */
1097 /* reclaim skb if DMA is not running. */
1098 if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN
))
1100 if (timeout_cnt
-- < 0)
1104 if (timeout_cnt
>= 0)
1107 netif_stop_queue(lp
->ndev
);
1110 if (current_tx_ptr
->next
!= tx_list_head
&&
1111 netif_queue_stopped(lp
->ndev
))
1112 netif_wake_queue(lp
->ndev
);
1114 if (tx_list_head
!= current_tx_ptr
) {
1115 /* shorten the timer interval if tx queue is stopped */
1116 if (netif_queue_stopped(lp
->ndev
))
1117 lp
->tx_reclaim_timer
.expires
=
1118 jiffies
+ (TX_RECLAIM_JIFFIES
>> 4);
1120 lp
->tx_reclaim_timer
.expires
=
1121 jiffies
+ TX_RECLAIM_JIFFIES
;
1123 mod_timer(&lp
->tx_reclaim_timer
,
1124 lp
->tx_reclaim_timer
.expires
);
1130 static void tx_reclaim_skb_timeout(unsigned long lp
)
1132 tx_reclaim_skb((struct bfin_mac_local
*)lp
);
1135 static int bfin_mac_hard_start_xmit(struct sk_buff
*skb
,
1136 struct net_device
*dev
)
1138 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1140 u32 data_align
= (unsigned long)(skb
->data
) & 0x3;
1142 current_tx_ptr
->skb
= skb
;
1144 if (data_align
== 0x2) {
1145 /* move skb->data to current_tx_ptr payload */
1146 data
= (u16
*)(skb
->data
) - 1;
1147 *data
= (u16
)(skb
->len
);
1149 * When transmitting an Ethernet packet, the PTP_TSYNC module requires
1150 * a DMA_Length_Word field associated with the packet. The lower 12 bits
1151 * of this field are the length of the packet payload in bytes and the higher
1152 * 4 bits are the timestamping enable field.
1154 if (skb_shinfo(skb
)->tx_flags
& SKBTX_HW_TSTAMP
)
1157 current_tx_ptr
->desc_a
.start_addr
= (u32
)data
;
1158 /* this is important! */
1159 blackfin_dcache_flush_range((u32
)data
,
1160 (u32
)((u8
*)data
+ skb
->len
+ 4));
1162 *((u16
*)(current_tx_ptr
->packet
)) = (u16
)(skb
->len
);
1163 /* enable timestamping for the sent packet */
1164 if (skb_shinfo(skb
)->tx_flags
& SKBTX_HW_TSTAMP
)
1165 *((u16
*)(current_tx_ptr
->packet
)) |= 0x1000;
1166 memcpy((u8
*)(current_tx_ptr
->packet
+ 2), skb
->data
,
1168 current_tx_ptr
->desc_a
.start_addr
=
1169 (u32
)current_tx_ptr
->packet
;
1170 blackfin_dcache_flush_range(
1171 (u32
)current_tx_ptr
->packet
,
1172 (u32
)(current_tx_ptr
->packet
+ skb
->len
+ 2));
1175 /* make sure the internal data buffers in the core are drained
1176 * so that the DMA descriptors are completely written when the
1177 * DMA engine goes to fetch them below
1181 /* always clear status buffer before start tx dma */
1182 current_tx_ptr
->status
.status_word
= 0;
1184 /* enable this packet's dma */
1185 current_tx_ptr
->desc_a
.config
|= DMAEN
;
1187 /* tx dma is running, just return */
1188 if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN
)
1191 /* tx dma is not running */
1192 bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr
->desc_a
));
1193 /* dma enabled, read from memory, size is 6 */
1194 bfin_write_DMA2_CONFIG(current_tx_ptr
->desc_a
.config
);
1195 /* Turn on the EMAC tx */
1196 bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE
);
1199 bfin_tx_hwtstamp(dev
, skb
);
1201 current_tx_ptr
= current_tx_ptr
->next
;
1202 dev
->stats
.tx_packets
++;
1203 dev
->stats
.tx_bytes
+= (skb
->len
);
1207 return NETDEV_TX_OK
;
1210 #define IP_HEADER_OFF 0
1211 #define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \
1212 RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE)
1214 static void bfin_mac_rx(struct net_device
*dev
)
1216 struct sk_buff
*skb
, *new_skb
;
1218 struct bfin_mac_local
*lp __maybe_unused
= netdev_priv(dev
);
1219 #if defined(BFIN_MAC_CSUM_OFFLOAD)
1221 unsigned char fcs
[ETH_FCS_LEN
+ 1];
1224 /* check if frame status word reports an error condition
1225 * we which case we simply drop the packet
1227 if (current_rx_ptr
->status
.status_word
& RX_ERROR_MASK
) {
1228 netdev_notice(dev
, "rx: receive error - packet dropped\n");
1229 dev
->stats
.rx_dropped
++;
1233 /* allocate a new skb for next time receive */
1234 skb
= current_rx_ptr
->skb
;
1236 new_skb
= netdev_alloc_skb(dev
, PKT_BUF_SZ
+ NET_IP_ALIGN
);
1238 dev
->stats
.rx_dropped
++;
1241 /* reserve 2 bytes for RXDWA padding */
1242 skb_reserve(new_skb
, NET_IP_ALIGN
);
1243 /* Invidate the data cache of skb->data range when it is write back
1244 * cache. It will prevent overwritting the new data from DMA
1246 blackfin_dcache_invalidate_range((unsigned long)new_skb
->head
,
1247 (unsigned long)new_skb
->end
);
1249 current_rx_ptr
->skb
= new_skb
;
1250 current_rx_ptr
->desc_a
.start_addr
= (unsigned long)new_skb
->data
- 2;
1252 len
= (unsigned short)((current_rx_ptr
->status
.status_word
) & RX_FRLEN
);
1253 /* Deduce Ethernet FCS length from Ethernet payload length */
1257 skb
->protocol
= eth_type_trans(skb
, dev
);
1259 bfin_rx_hwtstamp(dev
, skb
);
1261 #if defined(BFIN_MAC_CSUM_OFFLOAD)
1262 /* Checksum offloading only works for IPv4 packets with the standard IP header
1263 * length of 20 bytes, because the blackfin MAC checksum calculation is
1264 * based on that assumption. We must NOT use the calculated checksum if our
1265 * IP version or header break that assumption.
1267 if (skb
->data
[IP_HEADER_OFF
] == 0x45) {
1268 skb
->csum
= current_rx_ptr
->status
.ip_payload_csum
;
1270 * Deduce Ethernet FCS from hardware generated IP payload checksum.
1271 * IP checksum is based on 16-bit one's complement algorithm.
1272 * To deduce a value from checksum is equal to add its inversion.
1273 * If the IP payload len is odd, the inversed FCS should also
1274 * begin from odd address and leave first byte zero.
1278 for (i
= 0; i
< ETH_FCS_LEN
; i
++)
1279 fcs
[i
+ 1] = ~skb
->data
[skb
->len
+ i
];
1280 skb
->csum
= csum_partial(fcs
, ETH_FCS_LEN
+ 1, skb
->csum
);
1282 for (i
= 0; i
< ETH_FCS_LEN
; i
++)
1283 fcs
[i
] = ~skb
->data
[skb
->len
+ i
];
1284 skb
->csum
= csum_partial(fcs
, ETH_FCS_LEN
, skb
->csum
);
1286 skb
->ip_summed
= CHECKSUM_COMPLETE
;
1291 dev
->stats
.rx_packets
++;
1292 dev
->stats
.rx_bytes
+= len
;
1294 current_rx_ptr
->status
.status_word
= 0x00000000;
1295 current_rx_ptr
= current_rx_ptr
->next
;
1298 /* interrupt routine to handle rx and error signal */
1299 static irqreturn_t
bfin_mac_interrupt(int irq
, void *dev_id
)
1301 struct net_device
*dev
= dev_id
;
1305 if (current_rx_ptr
->status
.status_word
== 0) {
1306 /* no more new packet received */
1308 if (current_rx_ptr
->next
->status
.status_word
!= 0) {
1309 current_rx_ptr
= current_rx_ptr
->next
;
1313 bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() |
1314 DMA_DONE
| DMA_ERR
);
1321 goto get_one_packet
;
1324 #ifdef CONFIG_NET_POLL_CONTROLLER
1325 static void bfin_mac_poll(struct net_device
*dev
)
1327 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1329 disable_irq(IRQ_MAC_RX
);
1330 bfin_mac_interrupt(IRQ_MAC_RX
, dev
);
1332 enable_irq(IRQ_MAC_RX
);
1334 #endif /* CONFIG_NET_POLL_CONTROLLER */
1336 static void bfin_mac_disable(void)
1338 unsigned int opmode
;
1340 opmode
= bfin_read_EMAC_OPMODE();
1343 /* Turn off the EMAC */
1344 bfin_write_EMAC_OPMODE(opmode
);
1348 * Enable Interrupts, Receive, and Transmit
1350 static int bfin_mac_enable(struct phy_device
*phydev
)
1355 pr_debug("%s\n", __func__
);
1358 bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head
->desc_a
));
1359 bfin_write_DMA1_CONFIG(rx_list_head
->desc_a
.config
);
1362 ret
= bfin_mdio_poll();
1366 /* We enable only RX here */
1367 /* ASTP : Enable Automatic Pad Stripping
1368 PR : Promiscuous Mode for test
1369 PSF : Receive frames with total length less than 64 bytes.
1370 FDMODE : Full Duplex Mode
1371 LB : Internal Loopback for test
1372 RE : Receiver Enable */
1373 opmode
= bfin_read_EMAC_OPMODE();
1374 if (opmode
& FDMODE
)
1377 opmode
|= DRO
| DC
| PSF
;
1380 if (phydev
->interface
== PHY_INTERFACE_MODE_RMII
) {
1381 opmode
|= RMII
; /* For Now only 100MBit are supported */
1382 #if defined(CONFIG_BF537) || defined(CONFIG_BF536)
1383 if (__SILICON_REVISION__
< 3) {
1385 * This isn't publicly documented (fun times!), but in
1386 * silicon <=0.2, the RX and TX pins are clocked together.
1387 * So in order to recv, we must enable the transmit side
1388 * as well. This will cause a spurious TX interrupt too,
1389 * but we can easily consume that.
1396 /* Turn on the EMAC rx */
1397 bfin_write_EMAC_OPMODE(opmode
);
1402 /* Our watchdog timed out. Called by the networking layer */
1403 static void bfin_mac_timeout(struct net_device
*dev
)
1405 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1407 pr_debug("%s: %s\n", dev
->name
, __func__
);
1411 del_timer(&lp
->tx_reclaim_timer
);
1413 /* reset tx queue and free skb */
1414 while (tx_list_head
!= current_tx_ptr
) {
1415 tx_list_head
->desc_a
.config
&= ~DMAEN
;
1416 tx_list_head
->status
.status_word
= 0;
1417 if (tx_list_head
->skb
) {
1418 dev_kfree_skb(tx_list_head
->skb
);
1419 tx_list_head
->skb
= NULL
;
1421 tx_list_head
= tx_list_head
->next
;
1424 if (netif_queue_stopped(lp
->ndev
))
1425 netif_wake_queue(lp
->ndev
);
1427 bfin_mac_enable(lp
->phydev
);
1429 /* We can accept TX packets again */
1430 dev
->trans_start
= jiffies
; /* prevent tx timeout */
1431 netif_wake_queue(dev
);
1434 static void bfin_mac_multicast_hash(struct net_device
*dev
)
1436 u32 emac_hashhi
, emac_hashlo
;
1437 struct netdev_hw_addr
*ha
;
1440 emac_hashhi
= emac_hashlo
= 0;
1442 netdev_for_each_mc_addr(ha
, dev
) {
1443 crc
= ether_crc(ETH_ALEN
, ha
->addr
);
1447 emac_hashhi
|= 1 << (crc
& 0x1f);
1449 emac_hashlo
|= 1 << (crc
& 0x1f);
1452 bfin_write_EMAC_HASHHI(emac_hashhi
);
1453 bfin_write_EMAC_HASHLO(emac_hashlo
);
1457 * This routine will, depending on the values passed to it,
1458 * either make it accept multicast packets, go into
1459 * promiscuous mode (for TCPDUMP and cousins) or accept
1460 * a select set of multicast packets
1462 static void bfin_mac_set_multicast_list(struct net_device
*dev
)
1466 if (dev
->flags
& IFF_PROMISC
) {
1467 netdev_info(dev
, "set promisc mode\n");
1468 sysctl
= bfin_read_EMAC_OPMODE();
1470 bfin_write_EMAC_OPMODE(sysctl
);
1471 } else if (dev
->flags
& IFF_ALLMULTI
) {
1472 /* accept all multicast */
1473 sysctl
= bfin_read_EMAC_OPMODE();
1475 bfin_write_EMAC_OPMODE(sysctl
);
1476 } else if (!netdev_mc_empty(dev
)) {
1477 /* set up multicast hash table */
1478 sysctl
= bfin_read_EMAC_OPMODE();
1480 bfin_write_EMAC_OPMODE(sysctl
);
1481 bfin_mac_multicast_hash(dev
);
1483 /* clear promisc or multicast mode */
1484 sysctl
= bfin_read_EMAC_OPMODE();
1485 sysctl
&= ~(RAF
| PAM
);
1486 bfin_write_EMAC_OPMODE(sysctl
);
1490 static int bfin_mac_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
1492 struct bfin_mac_local
*lp
= netdev_priv(netdev
);
1494 if (!netif_running(netdev
))
1499 return bfin_mac_hwtstamp_ioctl(netdev
, ifr
, cmd
);
1502 return phy_mii_ioctl(lp
->phydev
, ifr
, cmd
);
1509 * this puts the device in an inactive state
1511 static void bfin_mac_shutdown(struct net_device
*dev
)
1513 /* Turn off the EMAC */
1514 bfin_write_EMAC_OPMODE(0x00000000);
1515 /* Turn off the EMAC RX DMA */
1516 bfin_write_DMA1_CONFIG(0x0000);
1517 bfin_write_DMA2_CONFIG(0x0000);
1521 * Open and Initialize the interface
1523 * Set up everything, reset the card, etc..
1525 static int bfin_mac_open(struct net_device
*dev
)
1527 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1529 pr_debug("%s: %s\n", dev
->name
, __func__
);
1532 * Check that the address is valid. If its not, refuse
1533 * to bring the device up. The user must specify an
1534 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1536 if (!is_valid_ether_addr(dev
->dev_addr
)) {
1537 netdev_warn(dev
, "no valid ethernet hw addr\n");
1541 /* initial rx and tx list */
1542 ret
= desc_list_init(dev
);
1546 phy_start(lp
->phydev
);
1547 phy_write(lp
->phydev
, MII_BMCR
, BMCR_RESET
);
1548 setup_system_regs(dev
);
1549 setup_mac_addr(dev
->dev_addr
);
1552 ret
= bfin_mac_enable(lp
->phydev
);
1555 pr_debug("hardware init finished\n");
1557 netif_start_queue(dev
);
1558 netif_carrier_on(dev
);
1564 * this makes the board clean up everything that it can
1565 * and not talk to the outside world. Caused by
1566 * an 'ifconfig ethX down'
1568 static int bfin_mac_close(struct net_device
*dev
)
1570 struct bfin_mac_local
*lp
= netdev_priv(dev
);
1571 pr_debug("%s: %s\n", dev
->name
, __func__
);
1573 netif_stop_queue(dev
);
1574 netif_carrier_off(dev
);
1576 phy_stop(lp
->phydev
);
1577 phy_write(lp
->phydev
, MII_BMCR
, BMCR_PDOWN
);
1579 /* clear everything */
1580 bfin_mac_shutdown(dev
);
1582 /* free the rx/tx buffers */
1588 static const struct net_device_ops bfin_mac_netdev_ops
= {
1589 .ndo_open
= bfin_mac_open
,
1590 .ndo_stop
= bfin_mac_close
,
1591 .ndo_start_xmit
= bfin_mac_hard_start_xmit
,
1592 .ndo_set_mac_address
= bfin_mac_set_mac_address
,
1593 .ndo_tx_timeout
= bfin_mac_timeout
,
1594 .ndo_set_rx_mode
= bfin_mac_set_multicast_list
,
1595 .ndo_do_ioctl
= bfin_mac_ioctl
,
1596 .ndo_validate_addr
= eth_validate_addr
,
1597 .ndo_change_mtu
= eth_change_mtu
,
1598 #ifdef CONFIG_NET_POLL_CONTROLLER
1599 .ndo_poll_controller
= bfin_mac_poll
,
1603 static int bfin_mac_probe(struct platform_device
*pdev
)
1605 struct net_device
*ndev
;
1606 struct bfin_mac_local
*lp
;
1607 struct platform_device
*pd
;
1608 struct bfin_mii_bus_platform_data
*mii_bus_data
;
1611 ndev
= alloc_etherdev(sizeof(struct bfin_mac_local
));
1615 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
1616 platform_set_drvdata(pdev
, ndev
);
1617 lp
= netdev_priv(ndev
);
1620 /* Grab the MAC address in the MAC */
1621 *(__le32
*) (&(ndev
->dev_addr
[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO());
1622 *(__le16
*) (&(ndev
->dev_addr
[4])) = cpu_to_le16((u16
) bfin_read_EMAC_ADDRHI());
1625 /*todo: how to proble? which is revision_register */
1626 bfin_write_EMAC_ADDRLO(0x12345678);
1627 if (bfin_read_EMAC_ADDRLO() != 0x12345678) {
1628 dev_err(&pdev
->dev
, "Cannot detect Blackfin on-chip ethernet MAC controller!\n");
1630 goto out_err_probe_mac
;
1635 * Is it valid? (Did bootloader initialize it?)
1636 * Grab the MAC from the board somehow
1637 * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c
1639 if (!is_valid_ether_addr(ndev
->dev_addr
)) {
1640 if (bfin_get_ether_addr(ndev
->dev_addr
) ||
1641 !is_valid_ether_addr(ndev
->dev_addr
)) {
1642 /* Still not valid, get a random one */
1643 netdev_warn(ndev
, "Setting Ethernet MAC to a random one\n");
1644 eth_hw_addr_random(ndev
);
1648 setup_mac_addr(ndev
->dev_addr
);
1650 if (!pdev
->dev
.platform_data
) {
1651 dev_err(&pdev
->dev
, "Cannot get platform device bfin_mii_bus!\n");
1653 goto out_err_probe_mac
;
1655 pd
= pdev
->dev
.platform_data
;
1656 lp
->mii_bus
= platform_get_drvdata(pd
);
1658 dev_err(&pdev
->dev
, "Cannot get mii_bus!\n");
1660 goto out_err_probe_mac
;
1662 lp
->mii_bus
->priv
= ndev
;
1663 mii_bus_data
= pd
->dev
.platform_data
;
1665 rc
= mii_probe(ndev
, mii_bus_data
->phy_mode
);
1667 dev_err(&pdev
->dev
, "MII Probe failed!\n");
1668 goto out_err_mii_probe
;
1671 lp
->vlan1_mask
= ETH_P_8021Q
| mii_bus_data
->vlan1_mask
;
1672 lp
->vlan2_mask
= ETH_P_8021Q
| mii_bus_data
->vlan2_mask
;
1674 /* Fill in the fields of the device structure with ethernet values. */
1677 ndev
->netdev_ops
= &bfin_mac_netdev_ops
;
1678 ndev
->ethtool_ops
= &bfin_mac_ethtool_ops
;
1680 init_timer(&lp
->tx_reclaim_timer
);
1681 lp
->tx_reclaim_timer
.data
= (unsigned long)lp
;
1682 lp
->tx_reclaim_timer
.function
= tx_reclaim_skb_timeout
;
1684 spin_lock_init(&lp
->lock
);
1686 /* now, enable interrupts */
1687 /* register irq handler */
1688 rc
= request_irq(IRQ_MAC_RX
, bfin_mac_interrupt
,
1689 IRQF_DISABLED
, "EMAC_RX", ndev
);
1691 dev_err(&pdev
->dev
, "Cannot request Blackfin MAC RX IRQ!\n");
1693 goto out_err_request_irq
;
1696 rc
= register_netdev(ndev
);
1698 dev_err(&pdev
->dev
, "Cannot register net device!\n");
1699 goto out_err_reg_ndev
;
1702 bfin_mac_hwtstamp_init(ndev
);
1703 rc
= bfin_phc_init(ndev
, &pdev
->dev
);
1705 dev_err(&pdev
->dev
, "Cannot register PHC device!\n");
1709 /* now, print out the card info, in a short format.. */
1710 netdev_info(ndev
, "%s, Version %s\n", DRV_DESC
, DRV_VERSION
);
1716 free_irq(IRQ_MAC_RX
, ndev
);
1717 out_err_request_irq
:
1719 mdiobus_unregister(lp
->mii_bus
);
1720 mdiobus_free(lp
->mii_bus
);
1727 static int bfin_mac_remove(struct platform_device
*pdev
)
1729 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1730 struct bfin_mac_local
*lp
= netdev_priv(ndev
);
1732 bfin_phc_release(lp
);
1734 lp
->mii_bus
->priv
= NULL
;
1736 unregister_netdev(ndev
);
1738 free_irq(IRQ_MAC_RX
, ndev
);
1746 static int bfin_mac_suspend(struct platform_device
*pdev
, pm_message_t mesg
)
1748 struct net_device
*net_dev
= platform_get_drvdata(pdev
);
1749 struct bfin_mac_local
*lp
= netdev_priv(net_dev
);
1752 bfin_write_EMAC_OPMODE((bfin_read_EMAC_OPMODE() & ~TE
) | RE
);
1753 bfin_write_EMAC_WKUP_CTL(MPKE
);
1754 enable_irq_wake(IRQ_MAC_WAKEDET
);
1756 if (netif_running(net_dev
))
1757 bfin_mac_close(net_dev
);
1763 static int bfin_mac_resume(struct platform_device
*pdev
)
1765 struct net_device
*net_dev
= platform_get_drvdata(pdev
);
1766 struct bfin_mac_local
*lp
= netdev_priv(net_dev
);
1769 bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE
);
1770 bfin_write_EMAC_WKUP_CTL(0);
1771 disable_irq_wake(IRQ_MAC_WAKEDET
);
1773 if (netif_running(net_dev
))
1774 bfin_mac_open(net_dev
);
1780 #define bfin_mac_suspend NULL
1781 #define bfin_mac_resume NULL
1782 #endif /* CONFIG_PM */
1784 static int bfin_mii_bus_probe(struct platform_device
*pdev
)
1786 struct mii_bus
*miibus
;
1787 struct bfin_mii_bus_platform_data
*mii_bus_pd
;
1788 const unsigned short *pin_req
;
1791 mii_bus_pd
= dev_get_platdata(&pdev
->dev
);
1793 dev_err(&pdev
->dev
, "No peripherals in platform data!\n");
1798 * We are setting up a network card,
1799 * so set the GPIO pins to Ethernet mode
1801 pin_req
= mii_bus_pd
->mac_peripherals
;
1802 rc
= peripheral_request_list(pin_req
, KBUILD_MODNAME
);
1804 dev_err(&pdev
->dev
, "Requesting peripherals failed!\n");
1809 miibus
= mdiobus_alloc();
1812 miibus
->read
= bfin_mdiobus_read
;
1813 miibus
->write
= bfin_mdiobus_write
;
1814 miibus
->reset
= bfin_mdiobus_reset
;
1816 miibus
->parent
= &pdev
->dev
;
1817 miibus
->name
= "bfin_mii_bus";
1818 miibus
->phy_mask
= mii_bus_pd
->phy_mask
;
1820 snprintf(miibus
->id
, MII_BUS_ID_SIZE
, "%s-%x",
1821 pdev
->name
, pdev
->id
);
1822 miibus
->irq
= kmalloc(sizeof(int)*PHY_MAX_ADDR
, GFP_KERNEL
);
1824 goto out_err_irq_alloc
;
1826 for (i
= rc
; i
< PHY_MAX_ADDR
; ++i
)
1827 miibus
->irq
[i
] = PHY_POLL
;
1829 rc
= clamp(mii_bus_pd
->phydev_number
, 0, PHY_MAX_ADDR
);
1830 if (rc
!= mii_bus_pd
->phydev_number
)
1831 dev_err(&pdev
->dev
, "Invalid number (%i) of phydevs\n",
1832 mii_bus_pd
->phydev_number
);
1833 for (i
= 0; i
< rc
; ++i
) {
1834 unsigned short phyaddr
= mii_bus_pd
->phydev_data
[i
].addr
;
1835 if (phyaddr
< PHY_MAX_ADDR
)
1836 miibus
->irq
[phyaddr
] = mii_bus_pd
->phydev_data
[i
].irq
;
1839 "Invalid PHY address %i for phydev %i\n",
1843 rc
= mdiobus_register(miibus
);
1845 dev_err(&pdev
->dev
, "Cannot register MDIO bus!\n");
1846 goto out_err_mdiobus_register
;
1849 platform_set_drvdata(pdev
, miibus
);
1852 out_err_mdiobus_register
:
1855 mdiobus_free(miibus
);
1857 peripheral_free_list(pin_req
);
1862 static int bfin_mii_bus_remove(struct platform_device
*pdev
)
1864 struct mii_bus
*miibus
= platform_get_drvdata(pdev
);
1865 struct bfin_mii_bus_platform_data
*mii_bus_pd
=
1866 dev_get_platdata(&pdev
->dev
);
1868 mdiobus_unregister(miibus
);
1870 mdiobus_free(miibus
);
1871 peripheral_free_list(mii_bus_pd
->mac_peripherals
);
1876 static struct platform_driver bfin_mii_bus_driver
= {
1877 .probe
= bfin_mii_bus_probe
,
1878 .remove
= bfin_mii_bus_remove
,
1880 .name
= "bfin_mii_bus",
1881 .owner
= THIS_MODULE
,
1885 static struct platform_driver bfin_mac_driver
= {
1886 .probe
= bfin_mac_probe
,
1887 .remove
= bfin_mac_remove
,
1888 .resume
= bfin_mac_resume
,
1889 .suspend
= bfin_mac_suspend
,
1891 .name
= KBUILD_MODNAME
,
1892 .owner
= THIS_MODULE
,
1896 static int __init
bfin_mac_init(void)
1899 ret
= platform_driver_register(&bfin_mii_bus_driver
);
1901 return platform_driver_register(&bfin_mac_driver
);
1905 module_init(bfin_mac_init
);
1907 static void __exit
bfin_mac_cleanup(void)
1909 platform_driver_unregister(&bfin_mac_driver
);
1910 platform_driver_unregister(&bfin_mii_bus_driver
);
1913 module_exit(bfin_mac_cleanup
);