2 * File: drivers/net/bfin_mac.c
5 * Bryan Wu <bryan.wu@analog.com>
8 * Luke Yang <luke.yang@analog.com>
14 * 2006-12-19 Aidan Williams, multicast hash support
15 * Copyright 2004-2006 Analog Devices Inc.
17 * Bugs: Enter bugs at http://blackfin.uclinux.org/
19 * This program is free software ; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation ; either version 2, or (at your option)
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY ; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License
30 * along with this program ; see the file COPYING.
31 * If not, write to the Free Software Foundation,
32 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
35 #include <linux/init.h>
36 #include <linux/module.h>
37 #include <linux/kernel.h>
38 #include <linux/sched.h>
39 #include <linux/slab.h>
40 #include <linux/delay.h>
41 #include <linux/timer.h>
42 #include <linux/errno.h>
43 #include <linux/irq.h>
45 #include <linux/ioport.h>
46 #include <linux/crc32.h>
47 #include <linux/device.h>
48 #include <linux/spinlock.h>
49 #include <linux/ethtool.h>
50 #include <linux/mii.h>
51 #include <linux/phy.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/skbuff.h>
55 #include <linux/platform_device.h>
58 #include <linux/dma-mapping.h>
60 #include <asm/blackfin.h>
61 #include <asm/cacheflush.h>
62 #include <asm/portmux.h>
66 #define DRV_NAME "bfin_mac"
67 #define DRV_VERSION "1.1"
68 #define DRV_AUTHOR "Bryan Wu, Luke Yang"
69 #define DRV_DESC "Blackfin BF53[67] on-chip Ethernet MAC driver"
71 MODULE_AUTHOR(DRV_AUTHOR
);
72 MODULE_LICENSE("GPL");
73 MODULE_DESCRIPTION(DRV_DESC
);
75 #if defined(CONFIG_BFIN_MAC_USE_L1)
76 # define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size)
77 # define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr)
79 # define bfin_mac_alloc(dma_handle, size) \
80 dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL)
81 # define bfin_mac_free(dma_handle, ptr) \
82 dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle)
85 #define PKT_BUF_SZ 1580
87 #define MAX_TIMEOUT_CNT 500
89 /* pointers to maintain transmit list */
90 static struct net_dma_desc_tx
*tx_list_head
;
91 static struct net_dma_desc_tx
*tx_list_tail
;
92 static struct net_dma_desc_rx
*rx_list_head
;
93 static struct net_dma_desc_rx
*rx_list_tail
;
94 static struct net_dma_desc_rx
*current_rx_ptr
;
95 static struct net_dma_desc_tx
*current_tx_ptr
;
96 static struct net_dma_desc_tx
*tx_desc
;
97 static struct net_dma_desc_rx
*rx_desc
;
99 static void bf537mac_disable(void);
100 static void bf537mac_enable(void);
102 static void desc_list_free(void)
104 struct net_dma_desc_rx
*r
;
105 struct net_dma_desc_tx
*t
;
107 #if !defined(CONFIG_BFIN_MAC_USE_L1)
108 dma_addr_t dma_handle
= 0;
113 for (i
= 0; i
< CONFIG_BFIN_TX_DESC_NUM
; i
++) {
116 dev_kfree_skb(t
->skb
);
122 bfin_mac_free(dma_handle
, tx_desc
);
127 for (i
= 0; i
< CONFIG_BFIN_RX_DESC_NUM
; i
++) {
130 dev_kfree_skb(r
->skb
);
136 bfin_mac_free(dma_handle
, rx_desc
);
140 static int desc_list_init(void)
143 struct sk_buff
*new_skb
;
144 #if !defined(CONFIG_BFIN_MAC_USE_L1)
146 * This dma_handle is useless in Blackfin dma_alloc_coherent().
147 * The real dma handler is the return value of dma_alloc_coherent().
149 dma_addr_t dma_handle
;
152 tx_desc
= bfin_mac_alloc(&dma_handle
,
153 sizeof(struct net_dma_desc_tx
) *
154 CONFIG_BFIN_TX_DESC_NUM
);
158 rx_desc
= bfin_mac_alloc(&dma_handle
,
159 sizeof(struct net_dma_desc_rx
) *
160 CONFIG_BFIN_RX_DESC_NUM
);
165 tx_list_head
= tx_list_tail
= tx_desc
;
167 for (i
= 0; i
< CONFIG_BFIN_TX_DESC_NUM
; i
++) {
168 struct net_dma_desc_tx
*t
= tx_desc
+ i
;
169 struct dma_descriptor
*a
= &(t
->desc_a
);
170 struct dma_descriptor
*b
= &(t
->desc_b
);
174 * read from memory WNR = 0
175 * wordsize is 32 bits
176 * 6 half words is desc size
179 a
->config
= WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
180 a
->start_addr
= (unsigned long)t
->packet
;
182 a
->next_dma_desc
= b
;
186 * write to memory WNR = 1
187 * wordsize is 32 bits
189 * 6 half words is desc size
192 b
->config
= DMAEN
| WNR
| WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
193 b
->start_addr
= (unsigned long)(&(t
->status
));
197 tx_list_tail
->desc_b
.next_dma_desc
= a
;
198 tx_list_tail
->next
= t
;
201 tx_list_tail
->next
= tx_list_head
; /* tx_list is a circle */
202 tx_list_tail
->desc_b
.next_dma_desc
= &(tx_list_head
->desc_a
);
203 current_tx_ptr
= tx_list_head
;
206 rx_list_head
= rx_list_tail
= rx_desc
;
208 for (i
= 0; i
< CONFIG_BFIN_RX_DESC_NUM
; i
++) {
209 struct net_dma_desc_rx
*r
= rx_desc
+ i
;
210 struct dma_descriptor
*a
= &(r
->desc_a
);
211 struct dma_descriptor
*b
= &(r
->desc_b
);
213 /* allocate a new skb for next time receive */
214 new_skb
= dev_alloc_skb(PKT_BUF_SZ
+ 2);
216 printk(KERN_NOTICE DRV_NAME
217 ": init: low on mem - packet dropped\n");
220 skb_reserve(new_skb
, 2);
225 * write to memory WNR = 1
226 * wordsize is 32 bits
228 * 6 half words is desc size
231 a
->config
= DMAEN
| WNR
| WDSIZE_32
| NDSIZE_6
| DMAFLOW_LARGE
;
232 /* since RXDWA is enabled */
233 a
->start_addr
= (unsigned long)new_skb
->data
- 2;
235 a
->next_dma_desc
= b
;
239 * write to memory WNR = 1
240 * wordsize is 32 bits
242 * 6 half words is desc size
245 b
->config
= DMAEN
| WNR
| WDSIZE_32
| DI_EN
|
246 NDSIZE_6
| DMAFLOW_LARGE
;
247 b
->start_addr
= (unsigned long)(&(r
->status
));
250 rx_list_tail
->desc_b
.next_dma_desc
= a
;
251 rx_list_tail
->next
= r
;
254 rx_list_tail
->next
= rx_list_head
; /* rx_list is a circle */
255 rx_list_tail
->desc_b
.next_dma_desc
= &(rx_list_head
->desc_a
);
256 current_rx_ptr
= rx_list_head
;
262 printk(KERN_ERR DRV_NAME
": kmalloc failed\n");
267 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
269 /* Set FER regs to MUX in Ethernet pins */
270 static int setup_pin_mux(int action
)
272 #if defined(CONFIG_BFIN_MAC_RMII)
273 u16 pin_req
[] = P_RMII0
;
275 u16 pin_req
[] = P_MII0
;
279 if (peripheral_request_list(pin_req
, DRV_NAME
)) {
280 printk(KERN_ERR DRV_NAME
281 ": Requesting Peripherals failed\n");
285 peripheral_free_list(pin_req
);
293 /* Wait until the previous MDC/MDIO transaction has completed */
294 static void mdio_poll(void)
296 int timeout_cnt
= MAX_TIMEOUT_CNT
;
298 /* poll the STABUSY bit */
299 while ((bfin_read_EMAC_STAADD()) & STABUSY
) {
301 if (timeout_cnt
-- < 0) {
302 printk(KERN_ERR DRV_NAME
303 ": wait MDC/MDIO transaction to complete timeout\n");
309 /* Read an off-chip register in a PHY through the MDC/MDIO port */
310 static int mdiobus_read(struct mii_bus
*bus
, int phy_addr
, int regnum
)
315 bfin_write_EMAC_STAADD(SET_PHYAD((u16
) phy_addr
) |
316 SET_REGAD((u16
) regnum
) |
321 return (int) bfin_read_EMAC_STADAT();
324 /* Write an off-chip register in a PHY through the MDC/MDIO port */
325 static int mdiobus_write(struct mii_bus
*bus
, int phy_addr
, int regnum
,
330 bfin_write_EMAC_STADAT((u32
) value
);
333 bfin_write_EMAC_STAADD(SET_PHYAD((u16
) phy_addr
) |
334 SET_REGAD((u16
) regnum
) |
343 static int mdiobus_reset(struct mii_bus
*bus
)
348 static void bf537_adjust_link(struct net_device
*dev
)
350 struct bf537mac_local
*lp
= netdev_priv(dev
);
351 struct phy_device
*phydev
= lp
->phydev
;
355 spin_lock_irqsave(&lp
->lock
, flags
);
357 /* Now we make sure that we can be in full duplex mode.
358 * If not, we operate in half-duplex mode. */
359 if (phydev
->duplex
!= lp
->old_duplex
) {
360 u32 opmode
= bfin_read_EMAC_OPMODE();
368 bfin_write_EMAC_OPMODE(opmode
);
369 lp
->old_duplex
= phydev
->duplex
;
372 if (phydev
->speed
!= lp
->old_speed
) {
373 #if defined(CONFIG_BFIN_MAC_RMII)
374 u32 opmode
= bfin_read_EMAC_OPMODE();
375 switch (phydev
->speed
) {
380 opmode
&= ~(RMII_10
);
384 "%s: Ack! Speed (%d) is not 10/100!\n",
385 DRV_NAME
, phydev
->speed
);
388 bfin_write_EMAC_OPMODE(opmode
);
392 lp
->old_speed
= phydev
->speed
;
400 } else if (lp
->old_link
) {
408 u32 opmode
= bfin_read_EMAC_OPMODE();
409 phy_print_status(phydev
);
410 pr_debug("EMAC_OPMODE = 0x%08x\n", opmode
);
413 spin_unlock_irqrestore(&lp
->lock
, flags
);
417 #define MDC_CLK 2500000
419 static int mii_probe(struct net_device
*dev
)
421 struct bf537mac_local
*lp
= netdev_priv(dev
);
422 struct phy_device
*phydev
= NULL
;
423 unsigned short sysctl
;
427 /* Enable PHY output early */
428 if (!(bfin_read_VR_CTL() & PHYCLKOE
))
429 bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE
);
432 mdc_div
= ((sclk
/ MDC_CLK
) / 2) - 1;
434 sysctl
= bfin_read_EMAC_SYSCTL();
435 sysctl
|= SET_MDCDIV(mdc_div
);
436 bfin_write_EMAC_SYSCTL(sysctl
);
438 /* search for connect PHY device */
439 for (i
= 0; i
< PHY_MAX_ADDR
; i
++) {
440 struct phy_device
*const tmp_phydev
= lp
->mii_bus
.phy_map
[i
];
443 continue; /* no PHY here... */
446 break; /* found it */
449 /* now we are supposed to have a proper phydev, to attach to... */
451 printk(KERN_INFO
"%s: Don't found any phy device at all\n",
456 #if defined(CONFIG_BFIN_MAC_RMII)
457 phydev
= phy_connect(dev
, phydev
->dev
.bus_id
, &bf537_adjust_link
, 0,
458 PHY_INTERFACE_MODE_RMII
);
460 phydev
= phy_connect(dev
, phydev
->dev
.bus_id
, &bf537_adjust_link
, 0,
461 PHY_INTERFACE_MODE_MII
);
464 if (IS_ERR(phydev
)) {
465 printk(KERN_ERR
"%s: Could not attach to PHY\n", dev
->name
);
466 return PTR_ERR(phydev
);
469 /* mask with MAC supported features */
470 phydev
->supported
&= (SUPPORTED_10baseT_Half
471 | SUPPORTED_10baseT_Full
472 | SUPPORTED_100baseT_Half
473 | SUPPORTED_100baseT_Full
475 | SUPPORTED_Pause
| SUPPORTED_Asym_Pause
479 phydev
->advertising
= phydev
->supported
;
486 printk(KERN_INFO
"%s: attached PHY driver [%s] "
487 "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
489 DRV_NAME
, phydev
->drv
->name
, phydev
->dev
.bus_id
, phydev
->irq
,
490 MDC_CLK
, mdc_div
, sclk
/1000000);
495 /**************************************************************************/
496 void setup_system_regs(struct net_device
*dev
)
498 unsigned short sysctl
;
501 * Odd word alignment for Receive Frame DMA word
502 * Configure checksum support and rcve frame word alignment
504 sysctl
= bfin_read_EMAC_SYSCTL();
505 #if defined(BFIN_MAC_CSUM_OFFLOAD)
506 sysctl
|= RXDWA
| RXCKS
;
510 bfin_write_EMAC_SYSCTL(sysctl
);
512 bfin_write_EMAC_MMC_CTL(RSTC
| CROLL
);
514 /* Initialize the TX DMA channel registers */
515 bfin_write_DMA2_X_COUNT(0);
516 bfin_write_DMA2_X_MODIFY(4);
517 bfin_write_DMA2_Y_COUNT(0);
518 bfin_write_DMA2_Y_MODIFY(0);
520 /* Initialize the RX DMA channel registers */
521 bfin_write_DMA1_X_COUNT(0);
522 bfin_write_DMA1_X_MODIFY(4);
523 bfin_write_DMA1_Y_COUNT(0);
524 bfin_write_DMA1_Y_MODIFY(0);
527 static void setup_mac_addr(u8
*mac_addr
)
529 u32 addr_low
= le32_to_cpu(*(__le32
*) & mac_addr
[0]);
530 u16 addr_hi
= le16_to_cpu(*(__le16
*) & mac_addr
[4]);
532 /* this depends on a little-endian machine */
533 bfin_write_EMAC_ADDRLO(addr_low
);
534 bfin_write_EMAC_ADDRHI(addr_hi
);
537 static int bf537mac_set_mac_address(struct net_device
*dev
, void *p
)
539 struct sockaddr
*addr
= p
;
540 if (netif_running(dev
))
542 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
543 setup_mac_addr(dev
->dev_addr
);
547 static void adjust_tx_list(void)
549 int timeout_cnt
= MAX_TIMEOUT_CNT
;
551 if (tx_list_head
->status
.status_word
!= 0
552 && current_tx_ptr
!= tx_list_head
) {
553 goto adjust_head
; /* released something, just return; */
557 * if nothing released, check wait condition
558 * current's next can not be the head,
559 * otherwise the dma will not stop as we want
561 if (current_tx_ptr
->next
->next
== tx_list_head
) {
562 while (tx_list_head
->status
.status_word
== 0) {
564 if (tx_list_head
->status
.status_word
!= 0
565 || !(bfin_read_DMA2_IRQ_STATUS() & 0x08)) {
568 if (timeout_cnt
-- < 0) {
569 printk(KERN_ERR DRV_NAME
570 ": wait for adjust tx list head timeout\n");
574 if (tx_list_head
->status
.status_word
!= 0) {
583 tx_list_head
->desc_a
.config
&= ~DMAEN
;
584 tx_list_head
->status
.status_word
= 0;
585 if (tx_list_head
->skb
) {
586 dev_kfree_skb(tx_list_head
->skb
);
587 tx_list_head
->skb
= NULL
;
589 printk(KERN_ERR DRV_NAME
590 ": no sk_buff in a transmitted frame!\n");
592 tx_list_head
= tx_list_head
->next
;
593 } while (tx_list_head
->status
.status_word
!= 0
594 && current_tx_ptr
!= tx_list_head
);
599 static int bf537mac_hard_start_xmit(struct sk_buff
*skb
,
600 struct net_device
*dev
)
602 struct bf537mac_local
*lp
= netdev_priv(dev
);
605 current_tx_ptr
->skb
= skb
;
608 * Is skb->data always 16-bit aligned?
609 * Do we need to memcpy((char *)(tail->packet + 2), skb->data, len)?
611 if ((((unsigned int)(skb
->data
)) & 0x02) == 2) {
612 /* move skb->data to current_tx_ptr payload */
613 data
= (unsigned int)(skb
->data
) - 2;
614 *((unsigned short *)data
) = (unsigned short)(skb
->len
);
615 current_tx_ptr
->desc_a
.start_addr
= (unsigned long)data
;
616 /* this is important! */
617 blackfin_dcache_flush_range(data
, (data
+ (skb
->len
)) + 2);
620 *((unsigned short *)(current_tx_ptr
->packet
)) =
621 (unsigned short)(skb
->len
);
622 memcpy((char *)(current_tx_ptr
->packet
+ 2), skb
->data
,
624 current_tx_ptr
->desc_a
.start_addr
=
625 (unsigned long)current_tx_ptr
->packet
;
626 if (current_tx_ptr
->status
.status_word
!= 0)
627 current_tx_ptr
->status
.status_word
= 0;
628 blackfin_dcache_flush_range((unsigned int)current_tx_ptr
->
630 (unsigned int)(current_tx_ptr
->
635 /* enable this packet's dma */
636 current_tx_ptr
->desc_a
.config
|= DMAEN
;
638 /* tx dma is running, just return */
639 if (bfin_read_DMA2_IRQ_STATUS() & 0x08)
642 /* tx dma is not running */
643 bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr
->desc_a
));
644 /* dma enabled, read from memory, size is 6 */
645 bfin_write_DMA2_CONFIG(current_tx_ptr
->desc_a
.config
);
646 /* Turn on the EMAC tx */
647 bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE
);
651 current_tx_ptr
= current_tx_ptr
->next
;
652 dev
->trans_start
= jiffies
;
653 dev
->stats
.tx_packets
++;
654 dev
->stats
.tx_bytes
+= (skb
->len
);
658 static void bf537mac_rx(struct net_device
*dev
)
660 struct sk_buff
*skb
, *new_skb
;
661 struct bf537mac_local
*lp
= netdev_priv(dev
);
664 /* allocate a new skb for next time receive */
665 skb
= current_rx_ptr
->skb
;
666 new_skb
= dev_alloc_skb(PKT_BUF_SZ
+ 2);
668 printk(KERN_NOTICE DRV_NAME
669 ": rx: low on mem - packet dropped\n");
670 dev
->stats
.rx_dropped
++;
673 /* reserve 2 bytes for RXDWA padding */
674 skb_reserve(new_skb
, 2);
675 current_rx_ptr
->skb
= new_skb
;
676 current_rx_ptr
->desc_a
.start_addr
= (unsigned long)new_skb
->data
- 2;
678 len
= (unsigned short)((current_rx_ptr
->status
.status_word
) & RX_FRLEN
);
680 blackfin_dcache_invalidate_range((unsigned long)skb
->head
,
681 (unsigned long)skb
->tail
);
683 dev
->last_rx
= jiffies
;
685 skb
->protocol
= eth_type_trans(skb
, dev
);
686 #if defined(BFIN_MAC_CSUM_OFFLOAD)
687 skb
->csum
= current_rx_ptr
->status
.ip_payload_csum
;
688 skb
->ip_summed
= CHECKSUM_COMPLETE
;
692 dev
->stats
.rx_packets
++;
693 dev
->stats
.rx_bytes
+= len
;
694 current_rx_ptr
->status
.status_word
= 0x00000000;
695 current_rx_ptr
= current_rx_ptr
->next
;
701 /* interrupt routine to handle rx and error signal */
702 static irqreturn_t
bf537mac_interrupt(int irq
, void *dev_id
)
704 struct net_device
*dev
= dev_id
;
708 if (current_rx_ptr
->status
.status_word
== 0) {
709 /* no more new packet received */
711 if (current_rx_ptr
->next
->status
.status_word
!= 0) {
712 current_rx_ptr
= current_rx_ptr
->next
;
716 bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() |
727 #ifdef CONFIG_NET_POLL_CONTROLLER
728 static void bf537mac_poll(struct net_device
*dev
)
730 disable_irq(IRQ_MAC_RX
);
731 bf537mac_interrupt(IRQ_MAC_RX
, dev
);
732 enable_irq(IRQ_MAC_RX
);
734 #endif /* CONFIG_NET_POLL_CONTROLLER */
736 static void bf537mac_disable(void)
740 opmode
= bfin_read_EMAC_OPMODE();
743 /* Turn off the EMAC */
744 bfin_write_EMAC_OPMODE(opmode
);
748 * Enable Interrupts, Receive, and Transmit
750 static void bf537mac_enable(void)
754 pr_debug("%s: %s\n", DRV_NAME
, __FUNCTION__
);
757 bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head
->desc_a
));
758 bfin_write_DMA1_CONFIG(rx_list_head
->desc_a
.config
);
763 /* We enable only RX here */
764 /* ASTP : Enable Automatic Pad Stripping
765 PR : Promiscuous Mode for test
766 PSF : Receive frames with total length less than 64 bytes.
767 FDMODE : Full Duplex Mode
768 LB : Internal Loopback for test
769 RE : Receiver Enable */
770 opmode
= bfin_read_EMAC_OPMODE();
774 opmode
|= DRO
| DC
| PSF
;
777 #if defined(CONFIG_BFIN_MAC_RMII)
778 opmode
|= RMII
; /* For Now only 100MBit are supported */
779 #ifdef CONFIG_BF_REV_0_2
783 /* Turn on the EMAC rx */
784 bfin_write_EMAC_OPMODE(opmode
);
787 /* Our watchdog timed out. Called by the networking layer */
788 static void bf537mac_timeout(struct net_device
*dev
)
790 pr_debug("%s: %s\n", dev
->name
, __FUNCTION__
);
795 tx_list_tail
= tx_list_head
->next
;
799 /* We can accept TX packets again */
800 dev
->trans_start
= jiffies
;
801 netif_wake_queue(dev
);
804 static void bf537mac_multicast_hash(struct net_device
*dev
)
806 u32 emac_hashhi
, emac_hashlo
;
807 struct dev_mc_list
*dmi
= dev
->mc_list
;
812 emac_hashhi
= emac_hashlo
= 0;
814 for (i
= 0; i
< dev
->mc_count
; i
++) {
815 addrs
= dmi
->dmi_addr
;
818 /* skip non-multicast addresses */
822 crc
= ether_crc(ETH_ALEN
, addrs
);
826 emac_hashhi
|= 1 << (crc
& 0x1f);
828 emac_hashlo
|= 1 << (crc
& 0x1f);
831 bfin_write_EMAC_HASHHI(emac_hashhi
);
832 bfin_write_EMAC_HASHLO(emac_hashlo
);
838 * This routine will, depending on the values passed to it,
839 * either make it accept multicast packets, go into
840 * promiscuous mode (for TCPDUMP and cousins) or accept
841 * a select set of multicast packets
843 static void bf537mac_set_multicast_list(struct net_device
*dev
)
847 if (dev
->flags
& IFF_PROMISC
) {
848 printk(KERN_INFO
"%s: set to promisc mode\n", dev
->name
);
849 sysctl
= bfin_read_EMAC_OPMODE();
851 bfin_write_EMAC_OPMODE(sysctl
);
852 } else if (dev
->flags
& IFF_ALLMULTI
) {
853 /* accept all multicast */
854 sysctl
= bfin_read_EMAC_OPMODE();
856 bfin_write_EMAC_OPMODE(sysctl
);
857 } else if (dev
->mc_count
) {
858 /* set up multicast hash table */
859 sysctl
= bfin_read_EMAC_OPMODE();
861 bfin_write_EMAC_OPMODE(sysctl
);
862 bf537mac_multicast_hash(dev
);
864 /* clear promisc or multicast mode */
865 sysctl
= bfin_read_EMAC_OPMODE();
866 sysctl
&= ~(RAF
| PAM
);
867 bfin_write_EMAC_OPMODE(sysctl
);
872 * this puts the device in an inactive state
874 static void bf537mac_shutdown(struct net_device
*dev
)
876 /* Turn off the EMAC */
877 bfin_write_EMAC_OPMODE(0x00000000);
878 /* Turn off the EMAC RX DMA */
879 bfin_write_DMA1_CONFIG(0x0000);
880 bfin_write_DMA2_CONFIG(0x0000);
884 * Open and Initialize the interface
886 * Set up everything, reset the card, etc..
888 static int bf537mac_open(struct net_device
*dev
)
890 struct bf537mac_local
*lp
= netdev_priv(dev
);
892 pr_debug("%s: %s\n", dev
->name
, __FUNCTION__
);
895 * Check that the address is valid. If its not, refuse
896 * to bring the device up. The user must specify an
897 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
899 if (!is_valid_ether_addr(dev
->dev_addr
)) {
900 printk(KERN_WARNING DRV_NAME
": no valid ethernet hw addr\n");
904 /* initial rx and tx list */
905 retval
= desc_list_init();
910 phy_start(lp
->phydev
);
911 setup_system_regs(dev
);
915 pr_debug("hardware init finished\n");
916 netif_start_queue(dev
);
917 netif_carrier_on(dev
);
924 * this makes the board clean up everything that it can
925 * and not talk to the outside world. Caused by
926 * an 'ifconfig ethX down'
928 static int bf537mac_close(struct net_device
*dev
)
930 struct bf537mac_local
*lp
= netdev_priv(dev
);
931 pr_debug("%s: %s\n", dev
->name
, __FUNCTION__
);
933 netif_stop_queue(dev
);
934 netif_carrier_off(dev
);
936 phy_stop(lp
->phydev
);
938 /* clear everything */
939 bf537mac_shutdown(dev
);
941 /* free the rx/tx buffers */
947 static int __init
bf537mac_probe(struct net_device
*dev
)
949 struct bf537mac_local
*lp
= netdev_priv(dev
);
953 /* Grab the MAC address in the MAC */
954 *(__le32
*) (&(dev
->dev_addr
[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO());
955 *(__le16
*) (&(dev
->dev_addr
[4])) = cpu_to_le16((u16
) bfin_read_EMAC_ADDRHI());
958 /*todo: how to proble? which is revision_register */
959 bfin_write_EMAC_ADDRLO(0x12345678);
960 if (bfin_read_EMAC_ADDRLO() != 0x12345678) {
961 pr_debug("can't detect bf537 mac!\n");
966 /* set the GPIO pins to Ethernet mode */
967 retval
= setup_pin_mux(1);
971 /*Is it valid? (Did bootloader initialize it?) */
972 if (!is_valid_ether_addr(dev
->dev_addr
)) {
973 /* Grab the MAC from the board somehow - this is done in the
974 arch/blackfin/mach-bf537/boards/eth_mac.c */
975 bfin_get_ether_addr(dev
->dev_addr
);
978 /* If still not valid, get a random one */
979 if (!is_valid_ether_addr(dev
->dev_addr
)) {
980 random_ether_addr(dev
->dev_addr
);
983 setup_mac_addr(dev
->dev_addr
);
985 /* MDIO bus initial */
986 lp
->mii_bus
.priv
= dev
;
987 lp
->mii_bus
.read
= mdiobus_read
;
988 lp
->mii_bus
.write
= mdiobus_write
;
989 lp
->mii_bus
.reset
= mdiobus_reset
;
990 lp
->mii_bus
.name
= "bfin_mac_mdio";
992 lp
->mii_bus
.irq
= kmalloc(sizeof(int)*PHY_MAX_ADDR
, GFP_KERNEL
);
993 for (i
= 0; i
< PHY_MAX_ADDR
; ++i
)
994 lp
->mii_bus
.irq
[i
] = PHY_POLL
;
996 mdiobus_register(&lp
->mii_bus
);
998 retval
= mii_probe(dev
);
1002 /* Fill in the fields of the device structure with ethernet values. */
1005 dev
->open
= bf537mac_open
;
1006 dev
->stop
= bf537mac_close
;
1007 dev
->hard_start_xmit
= bf537mac_hard_start_xmit
;
1008 dev
->set_mac_address
= bf537mac_set_mac_address
;
1009 dev
->tx_timeout
= bf537mac_timeout
;
1010 dev
->set_multicast_list
= bf537mac_set_multicast_list
;
1011 #ifdef CONFIG_NET_POLL_CONTROLLER
1012 dev
->poll_controller
= bf537mac_poll
;
1015 spin_lock_init(&lp
->lock
);
1017 /* now, enable interrupts */
1018 /* register irq handler */
1020 (IRQ_MAC_RX
, bf537mac_interrupt
, IRQF_DISABLED
| IRQF_SHARED
,
1021 "BFIN537_MAC_RX", dev
)) {
1022 printk(KERN_WARNING DRV_NAME
1023 ": Unable to attach BlackFin MAC RX interrupt\n");
1028 retval
= register_netdev(dev
);
1030 /* now, print out the card info, in a short format.. */
1031 printk(KERN_INFO
"%s: Version %s, %s\n",
1032 DRV_NAME
, DRV_VERSION
, DRV_DESC
);
1039 static int bfin_mac_probe(struct platform_device
*pdev
)
1041 struct net_device
*ndev
;
1043 ndev
= alloc_etherdev(sizeof(struct bf537mac_local
));
1045 printk(KERN_WARNING DRV_NAME
": could not allocate device\n");
1049 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
1051 platform_set_drvdata(pdev
, ndev
);
1053 if (bf537mac_probe(ndev
) != 0) {
1054 platform_set_drvdata(pdev
, NULL
);
1056 printk(KERN_WARNING DRV_NAME
": not found\n");
1063 static int bfin_mac_remove(struct platform_device
*pdev
)
1065 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1067 platform_set_drvdata(pdev
, NULL
);
1069 unregister_netdev(ndev
);
1071 free_irq(IRQ_MAC_RX
, ndev
);
1081 static int bfin_mac_suspend(struct platform_device
*pdev
, pm_message_t mesg
)
1083 struct net_device
*net_dev
= platform_get_drvdata(pdev
);
1085 if (netif_running(net_dev
))
1086 bf537mac_close(net_dev
);
1091 static int bfin_mac_resume(struct platform_device
*pdev
)
1093 struct net_device
*net_dev
= platform_get_drvdata(pdev
);
1095 if (netif_running(net_dev
))
1096 bf537mac_open(net_dev
);
1101 #define bfin_mac_suspend NULL
1102 #define bfin_mac_resume NULL
1103 #endif /* CONFIG_PM */
1105 static struct platform_driver bfin_mac_driver
= {
1106 .probe
= bfin_mac_probe
,
1107 .remove
= bfin_mac_remove
,
1108 .resume
= bfin_mac_resume
,
1109 .suspend
= bfin_mac_suspend
,
1115 static int __init
bfin_mac_init(void)
1117 return platform_driver_register(&bfin_mac_driver
);
1120 module_init(bfin_mac_init
);
1122 static void __exit
bfin_mac_cleanup(void)
1124 platform_driver_unregister(&bfin_mac_driver
);
1127 module_exit(bfin_mac_cleanup
);