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/blackfin.h>
37 #include <asm/cacheflush.h>
38 #include <asm/portmux.h>
42 #define DRV_NAME "bfin_mac"
43 #define DRV_VERSION "1.1"
44 #define DRV_AUTHOR "Bryan Wu, Luke Yang"
45 #define DRV_DESC "Blackfin on-chip Ethernet MAC driver"
47 MODULE_AUTHOR(DRV_AUTHOR);
48 MODULE_LICENSE("GPL");
49 MODULE_DESCRIPTION(DRV_DESC);
50 MODULE_ALIAS("platform:bfin_mac");
52 #if defined(CONFIG_BFIN_MAC_USE_L1)
53 # define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size)
54 # define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr)
56 # define bfin_mac_alloc(dma_handle, size) \
57 dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL)
58 # define bfin_mac_free(dma_handle, ptr) \
59 dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle)
62 #define PKT_BUF_SZ 1580
64 #define MAX_TIMEOUT_CNT 500
66 /* pointers to maintain transmit list */
67 static struct net_dma_desc_tx *tx_list_head;
68 static struct net_dma_desc_tx *tx_list_tail;
69 static struct net_dma_desc_rx *rx_list_head;
70 static struct net_dma_desc_rx *rx_list_tail;
71 static struct net_dma_desc_rx *current_rx_ptr;
72 static struct net_dma_desc_tx *current_tx_ptr;
73 static struct net_dma_desc_tx *tx_desc;
74 static struct net_dma_desc_rx *rx_desc;
76 #if defined(CONFIG_BFIN_MAC_RMII)
77 static u16 pin_req[] = P_RMII0;
79 static u16 pin_req[] = P_MII0;
82 static void bfin_mac_disable(void);
83 static void bfin_mac_enable(void);
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 + 2);
199 printk(KERN_NOTICE DRV_NAME
200 ": init: low on mem - packet dropped\n");
203 skb_reserve(new_skb, 2);
208 * write to memory WNR = 1
209 * wordsize is 32 bits
211 * 6 half words is desc size
214 a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
215 /* since RXDWA is enabled */
216 a->start_addr = (unsigned long)new_skb->data - 2;
218 a->next_dma_desc = b;
222 * write to memory WNR = 1
223 * wordsize is 32 bits
225 * 6 half words is desc size
228 b->config = DMAEN | WNR | WDSIZE_32 | DI_EN |
229 NDSIZE_6 | DMAFLOW_LARGE;
230 b->start_addr = (unsigned long)(&(r->status));
233 rx_list_tail->desc_b.next_dma_desc = a;
234 rx_list_tail->next = r;
237 rx_list_tail->next = rx_list_head; /* rx_list is a circle */
238 rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a);
239 current_rx_ptr = rx_list_head;
245 printk(KERN_ERR DRV_NAME ": kmalloc failed\n");
250 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
255 /* Wait until the previous MDC/MDIO transaction has completed */
256 static void bfin_mdio_poll(void)
258 int timeout_cnt = MAX_TIMEOUT_CNT;
260 /* poll the STABUSY bit */
261 while ((bfin_read_EMAC_STAADD()) & STABUSY) {
263 if (timeout_cnt-- < 0) {
264 printk(KERN_ERR DRV_NAME
265 ": wait MDC/MDIO transaction to complete timeout\n");
271 /* Read an off-chip register in a PHY through the MDC/MDIO port */
272 static int bfin_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
277 bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
278 SET_REGAD((u16) regnum) |
283 return (int) bfin_read_EMAC_STADAT();
286 /* Write an off-chip register in a PHY through the MDC/MDIO port */
287 static int bfin_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
292 bfin_write_EMAC_STADAT((u32) value);
295 bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
296 SET_REGAD((u16) regnum) |
305 static int bfin_mdiobus_reset(struct mii_bus *bus)
310 static void bfin_mac_adjust_link(struct net_device *dev)
312 struct bfin_mac_local *lp = netdev_priv(dev);
313 struct phy_device *phydev = lp->phydev;
317 spin_lock_irqsave(&lp->lock, flags);
319 /* Now we make sure that we can be in full duplex mode.
320 * If not, we operate in half-duplex mode. */
321 if (phydev->duplex != lp->old_duplex) {
322 u32 opmode = bfin_read_EMAC_OPMODE();
330 bfin_write_EMAC_OPMODE(opmode);
331 lp->old_duplex = phydev->duplex;
334 if (phydev->speed != lp->old_speed) {
335 #if defined(CONFIG_BFIN_MAC_RMII)
336 u32 opmode = bfin_read_EMAC_OPMODE();
337 switch (phydev->speed) {
342 opmode &= ~(RMII_10);
346 "%s: Ack! Speed (%d) is not 10/100!\n",
347 DRV_NAME, phydev->speed);
350 bfin_write_EMAC_OPMODE(opmode);
354 lp->old_speed = phydev->speed;
361 } else if (lp->old_link) {
369 u32 opmode = bfin_read_EMAC_OPMODE();
370 phy_print_status(phydev);
371 pr_debug("EMAC_OPMODE = 0x%08x\n", opmode);
374 spin_unlock_irqrestore(&lp->lock, flags);
378 #define MDC_CLK 2500000
380 static int mii_probe(struct net_device *dev)
382 struct bfin_mac_local *lp = netdev_priv(dev);
383 struct phy_device *phydev = NULL;
384 unsigned short sysctl;
388 /* Enable PHY output early */
389 if (!(bfin_read_VR_CTL() & PHYCLKOE))
390 bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
393 mdc_div = ((sclk / MDC_CLK) / 2) - 1;
395 sysctl = bfin_read_EMAC_SYSCTL();
396 sysctl = (sysctl & ~MDCDIV) | SET_MDCDIV(mdc_div);
397 bfin_write_EMAC_SYSCTL(sysctl);
399 /* search for connect PHY device */
400 for (i = 0; i < PHY_MAX_ADDR; i++) {
401 struct phy_device *const tmp_phydev = lp->mii_bus->phy_map[i];
404 continue; /* no PHY here... */
407 break; /* found it */
410 /* now we are supposed to have a proper phydev, to attach to... */
412 printk(KERN_INFO "%s: Don't found any phy device at all\n",
417 #if defined(CONFIG_BFIN_MAC_RMII)
418 phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link,
419 0, PHY_INTERFACE_MODE_RMII);
421 phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link,
422 0, PHY_INTERFACE_MODE_MII);
425 if (IS_ERR(phydev)) {
426 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
427 return PTR_ERR(phydev);
430 /* mask with MAC supported features */
431 phydev->supported &= (SUPPORTED_10baseT_Half
432 | SUPPORTED_10baseT_Full
433 | SUPPORTED_100baseT_Half
434 | SUPPORTED_100baseT_Full
436 | SUPPORTED_Pause | SUPPORTED_Asym_Pause
440 phydev->advertising = phydev->supported;
447 printk(KERN_INFO "%s: attached PHY driver [%s] "
448 "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
450 DRV_NAME, phydev->drv->name, dev_name(&phydev->dev), phydev->irq,
451 MDC_CLK, mdc_div, sclk/1000000);
461 bfin_mac_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
463 struct bfin_mac_local *lp = netdev_priv(dev);
466 return phy_ethtool_gset(lp->phydev, cmd);
472 bfin_mac_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
474 struct bfin_mac_local *lp = netdev_priv(dev);
476 if (!capable(CAP_NET_ADMIN))
480 return phy_ethtool_sset(lp->phydev, cmd);
485 static void bfin_mac_ethtool_getdrvinfo(struct net_device *dev,
486 struct ethtool_drvinfo *info)
488 strcpy(info->driver, DRV_NAME);
489 strcpy(info->version, DRV_VERSION);
490 strcpy(info->fw_version, "N/A");
491 strcpy(info->bus_info, dev_name(&dev->dev));
494 static struct ethtool_ops bfin_mac_ethtool_ops = {
495 .get_settings = bfin_mac_ethtool_getsettings,
496 .set_settings = bfin_mac_ethtool_setsettings,
497 .get_link = ethtool_op_get_link,
498 .get_drvinfo = bfin_mac_ethtool_getdrvinfo,
501 /**************************************************************************/
502 void setup_system_regs(struct net_device *dev)
504 unsigned short sysctl;
507 * Odd word alignment for Receive Frame DMA word
508 * Configure checksum support and rcve frame word alignment
510 sysctl = bfin_read_EMAC_SYSCTL();
511 #if defined(BFIN_MAC_CSUM_OFFLOAD)
512 sysctl |= RXDWA | RXCKS;
516 bfin_write_EMAC_SYSCTL(sysctl);
518 bfin_write_EMAC_MMC_CTL(RSTC | CROLL);
520 /* Initialize the TX DMA channel registers */
521 bfin_write_DMA2_X_COUNT(0);
522 bfin_write_DMA2_X_MODIFY(4);
523 bfin_write_DMA2_Y_COUNT(0);
524 bfin_write_DMA2_Y_MODIFY(0);
526 /* Initialize the RX DMA channel registers */
527 bfin_write_DMA1_X_COUNT(0);
528 bfin_write_DMA1_X_MODIFY(4);
529 bfin_write_DMA1_Y_COUNT(0);
530 bfin_write_DMA1_Y_MODIFY(0);
533 static void setup_mac_addr(u8 *mac_addr)
535 u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]);
536 u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]);
538 /* this depends on a little-endian machine */
539 bfin_write_EMAC_ADDRLO(addr_low);
540 bfin_write_EMAC_ADDRHI(addr_hi);
543 static int bfin_mac_set_mac_address(struct net_device *dev, void *p)
545 struct sockaddr *addr = p;
546 if (netif_running(dev))
548 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
549 setup_mac_addr(dev->dev_addr);
553 static void adjust_tx_list(void)
555 int timeout_cnt = MAX_TIMEOUT_CNT;
557 if (tx_list_head->status.status_word != 0
558 && current_tx_ptr != tx_list_head) {
559 goto adjust_head; /* released something, just return; */
563 * if nothing released, check wait condition
564 * current's next can not be the head,
565 * otherwise the dma will not stop as we want
567 if (current_tx_ptr->next->next == tx_list_head) {
568 while (tx_list_head->status.status_word == 0) {
570 if (tx_list_head->status.status_word != 0
571 || !(bfin_read_DMA2_IRQ_STATUS() & 0x08)) {
574 if (timeout_cnt-- < 0) {
575 printk(KERN_ERR DRV_NAME
576 ": wait for adjust tx list head timeout\n");
580 if (tx_list_head->status.status_word != 0) {
589 tx_list_head->desc_a.config &= ~DMAEN;
590 tx_list_head->status.status_word = 0;
591 if (tx_list_head->skb) {
592 dev_kfree_skb(tx_list_head->skb);
593 tx_list_head->skb = NULL;
595 printk(KERN_ERR DRV_NAME
596 ": no sk_buff in a transmitted frame!\n");
598 tx_list_head = tx_list_head->next;
599 } while (tx_list_head->status.status_word != 0
600 && current_tx_ptr != tx_list_head);
605 static int bfin_mac_hard_start_xmit(struct sk_buff *skb,
606 struct net_device *dev)
610 current_tx_ptr->skb = skb;
612 if (ANOMALY_05000285) {
614 * TXDWA feature is not avaible to older revision < 0.3 silicon
617 * Only if data buffer is ODD WORD alignment, we do not
620 u32 data_align = (u32)(skb->data) & 0x3;
621 if (data_align == 0x2) {
622 /* move skb->data to current_tx_ptr payload */
623 data = (u16 *)(skb->data) - 1;
624 *data = (u16)(skb->len);
625 current_tx_ptr->desc_a.start_addr = (u32)data;
626 /* this is important! */
627 blackfin_dcache_flush_range((u32)data,
628 (u32)((u8 *)data + skb->len + 4));
630 *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len);
631 memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data,
633 current_tx_ptr->desc_a.start_addr =
634 (u32)current_tx_ptr->packet;
635 if (current_tx_ptr->status.status_word != 0)
636 current_tx_ptr->status.status_word = 0;
637 blackfin_dcache_flush_range(
638 (u32)current_tx_ptr->packet,
639 (u32)(current_tx_ptr->packet + skb->len + 2));
643 * TXDWA feature is avaible to revision < 0.3 silicon of
644 * BF537 and always avaible to BF52x
646 u32 data_align = (u32)(skb->data) & 0x3;
647 if (data_align == 0x0) {
648 u16 sysctl = bfin_read_EMAC_SYSCTL();
650 bfin_write_EMAC_SYSCTL(sysctl);
652 /* move skb->data to current_tx_ptr payload */
653 data = (u16 *)(skb->data) - 2;
654 *data = (u16)(skb->len);
655 current_tx_ptr->desc_a.start_addr = (u32)data;
656 /* this is important! */
657 blackfin_dcache_flush_range(
659 (u32)((u8 *)data + skb->len + 4));
660 } else if (data_align == 0x2) {
661 u16 sysctl = bfin_read_EMAC_SYSCTL();
663 bfin_write_EMAC_SYSCTL(sysctl);
665 /* move skb->data to current_tx_ptr payload */
666 data = (u16 *)(skb->data) - 1;
667 *data = (u16)(skb->len);
668 current_tx_ptr->desc_a.start_addr = (u32)data;
669 /* this is important! */
670 blackfin_dcache_flush_range(
672 (u32)((u8 *)data + skb->len + 4));
674 u16 sysctl = bfin_read_EMAC_SYSCTL();
676 bfin_write_EMAC_SYSCTL(sysctl);
678 *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len);
679 memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data,
681 current_tx_ptr->desc_a.start_addr =
682 (u32)current_tx_ptr->packet;
683 if (current_tx_ptr->status.status_word != 0)
684 current_tx_ptr->status.status_word = 0;
685 blackfin_dcache_flush_range(
686 (u32)current_tx_ptr->packet,
687 (u32)(current_tx_ptr->packet + skb->len + 2));
691 /* enable this packet's dma */
692 current_tx_ptr->desc_a.config |= DMAEN;
694 /* tx dma is running, just return */
695 if (bfin_read_DMA2_IRQ_STATUS() & 0x08)
698 /* tx dma is not running */
699 bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a));
700 /* dma enabled, read from memory, size is 6 */
701 bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config);
702 /* Turn on the EMAC tx */
703 bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE);
707 current_tx_ptr = current_tx_ptr->next;
708 dev->trans_start = jiffies;
709 dev->stats.tx_packets++;
710 dev->stats.tx_bytes += (skb->len);
714 static void bfin_mac_rx(struct net_device *dev)
716 struct sk_buff *skb, *new_skb;
719 /* allocate a new skb for next time receive */
720 skb = current_rx_ptr->skb;
721 new_skb = dev_alloc_skb(PKT_BUF_SZ + 2);
723 printk(KERN_NOTICE DRV_NAME
724 ": rx: low on mem - packet dropped\n");
725 dev->stats.rx_dropped++;
728 /* reserve 2 bytes for RXDWA padding */
729 skb_reserve(new_skb, 2);
730 current_rx_ptr->skb = new_skb;
731 current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2;
733 /* Invidate the data cache of skb->data range when it is write back
734 * cache. It will prevent overwritting the new data from DMA
736 blackfin_dcache_invalidate_range((unsigned long)new_skb->head,
737 (unsigned long)new_skb->end);
739 len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN);
741 blackfin_dcache_invalidate_range((unsigned long)skb->head,
742 (unsigned long)skb->tail);
744 skb->protocol = eth_type_trans(skb, dev);
745 #if defined(BFIN_MAC_CSUM_OFFLOAD)
746 skb->csum = current_rx_ptr->status.ip_payload_csum;
747 skb->ip_summed = CHECKSUM_COMPLETE;
751 dev->stats.rx_packets++;
752 dev->stats.rx_bytes += len;
753 current_rx_ptr->status.status_word = 0x00000000;
754 current_rx_ptr = current_rx_ptr->next;
760 /* interrupt routine to handle rx and error signal */
761 static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id)
763 struct net_device *dev = dev_id;
767 if (current_rx_ptr->status.status_word == 0) {
768 /* no more new packet received */
770 if (current_rx_ptr->next->status.status_word != 0) {
771 current_rx_ptr = current_rx_ptr->next;
775 bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() |
786 #ifdef CONFIG_NET_POLL_CONTROLLER
787 static void bfin_mac_poll(struct net_device *dev)
789 disable_irq(IRQ_MAC_RX);
790 bfin_mac_interrupt(IRQ_MAC_RX, dev);
791 enable_irq(IRQ_MAC_RX);
793 #endif /* CONFIG_NET_POLL_CONTROLLER */
795 static void bfin_mac_disable(void)
799 opmode = bfin_read_EMAC_OPMODE();
802 /* Turn off the EMAC */
803 bfin_write_EMAC_OPMODE(opmode);
807 * Enable Interrupts, Receive, and Transmit
809 static void bfin_mac_enable(void)
813 pr_debug("%s: %s\n", DRV_NAME, __func__);
816 bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a));
817 bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config);
822 /* We enable only RX here */
823 /* ASTP : Enable Automatic Pad Stripping
824 PR : Promiscuous Mode for test
825 PSF : Receive frames with total length less than 64 bytes.
826 FDMODE : Full Duplex Mode
827 LB : Internal Loopback for test
828 RE : Receiver Enable */
829 opmode = bfin_read_EMAC_OPMODE();
833 opmode |= DRO | DC | PSF;
836 #if defined(CONFIG_BFIN_MAC_RMII)
837 opmode |= RMII; /* For Now only 100MBit are supported */
838 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2
842 /* Turn on the EMAC rx */
843 bfin_write_EMAC_OPMODE(opmode);
846 /* Our watchdog timed out. Called by the networking layer */
847 static void bfin_mac_timeout(struct net_device *dev)
849 pr_debug("%s: %s\n", dev->name, __func__);
854 tx_list_tail = tx_list_head->next;
858 /* We can accept TX packets again */
859 dev->trans_start = jiffies;
860 netif_wake_queue(dev);
863 static void bfin_mac_multicast_hash(struct net_device *dev)
865 u32 emac_hashhi, emac_hashlo;
866 struct dev_mc_list *dmi = dev->mc_list;
871 emac_hashhi = emac_hashlo = 0;
873 for (i = 0; i < dev->mc_count; i++) {
874 addrs = dmi->dmi_addr;
877 /* skip non-multicast addresses */
881 crc = ether_crc(ETH_ALEN, addrs);
885 emac_hashhi |= 1 << (crc & 0x1f);
887 emac_hashlo |= 1 << (crc & 0x1f);
890 bfin_write_EMAC_HASHHI(emac_hashhi);
891 bfin_write_EMAC_HASHLO(emac_hashlo);
897 * This routine will, depending on the values passed to it,
898 * either make it accept multicast packets, go into
899 * promiscuous mode (for TCPDUMP and cousins) or accept
900 * a select set of multicast packets
902 static void bfin_mac_set_multicast_list(struct net_device *dev)
906 if (dev->flags & IFF_PROMISC) {
907 printk(KERN_INFO "%s: set to promisc mode\n", dev->name);
908 sysctl = bfin_read_EMAC_OPMODE();
910 bfin_write_EMAC_OPMODE(sysctl);
911 } else if (dev->flags & IFF_ALLMULTI) {
912 /* accept all multicast */
913 sysctl = bfin_read_EMAC_OPMODE();
915 bfin_write_EMAC_OPMODE(sysctl);
916 } else if (dev->mc_count) {
917 /* set up multicast hash table */
918 sysctl = bfin_read_EMAC_OPMODE();
920 bfin_write_EMAC_OPMODE(sysctl);
921 bfin_mac_multicast_hash(dev);
923 /* clear promisc or multicast mode */
924 sysctl = bfin_read_EMAC_OPMODE();
925 sysctl &= ~(RAF | PAM);
926 bfin_write_EMAC_OPMODE(sysctl);
931 * this puts the device in an inactive state
933 static void bfin_mac_shutdown(struct net_device *dev)
935 /* Turn off the EMAC */
936 bfin_write_EMAC_OPMODE(0x00000000);
937 /* Turn off the EMAC RX DMA */
938 bfin_write_DMA1_CONFIG(0x0000);
939 bfin_write_DMA2_CONFIG(0x0000);
943 * Open and Initialize the interface
945 * Set up everything, reset the card, etc..
947 static int bfin_mac_open(struct net_device *dev)
949 struct bfin_mac_local *lp = netdev_priv(dev);
951 pr_debug("%s: %s\n", dev->name, __func__);
954 * Check that the address is valid. If its not, refuse
955 * to bring the device up. The user must specify an
956 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
958 if (!is_valid_ether_addr(dev->dev_addr)) {
959 printk(KERN_WARNING DRV_NAME ": no valid ethernet hw addr\n");
963 /* initial rx and tx list */
964 retval = desc_list_init();
969 phy_start(lp->phydev);
970 phy_write(lp->phydev, MII_BMCR, BMCR_RESET);
971 setup_system_regs(dev);
972 setup_mac_addr(dev->dev_addr);
975 pr_debug("hardware init finished\n");
976 netif_start_queue(dev);
977 netif_carrier_on(dev);
983 * this makes the board clean up everything that it can
984 * and not talk to the outside world. Caused by
985 * an 'ifconfig ethX down'
987 static int bfin_mac_close(struct net_device *dev)
989 struct bfin_mac_local *lp = netdev_priv(dev);
990 pr_debug("%s: %s\n", dev->name, __func__);
992 netif_stop_queue(dev);
993 netif_carrier_off(dev);
995 phy_stop(lp->phydev);
996 phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN);
998 /* clear everything */
999 bfin_mac_shutdown(dev);
1001 /* free the rx/tx buffers */
1007 static const struct net_device_ops bfin_mac_netdev_ops = {
1008 .ndo_open = bfin_mac_open,
1009 .ndo_stop = bfin_mac_close,
1010 .ndo_start_xmit = bfin_mac_hard_start_xmit,
1011 .ndo_set_mac_address = bfin_mac_set_mac_address,
1012 .ndo_tx_timeout = bfin_mac_timeout,
1013 .ndo_set_multicast_list = bfin_mac_set_multicast_list,
1014 .ndo_validate_addr = eth_validate_addr,
1015 .ndo_change_mtu = eth_change_mtu,
1016 #ifdef CONFIG_NET_POLL_CONTROLLER
1017 .ndo_poll_controller = bfin_mac_poll,
1021 static int __devinit bfin_mac_probe(struct platform_device *pdev)
1023 struct net_device *ndev;
1024 struct bfin_mac_local *lp;
1027 ndev = alloc_etherdev(sizeof(struct bfin_mac_local));
1029 dev_err(&pdev->dev, "Cannot allocate net device!\n");
1033 SET_NETDEV_DEV(ndev, &pdev->dev);
1034 platform_set_drvdata(pdev, ndev);
1035 lp = netdev_priv(ndev);
1037 /* Grab the MAC address in the MAC */
1038 *(__le32 *) (&(ndev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO());
1039 *(__le16 *) (&(ndev->dev_addr[4])) = cpu_to_le16((u16) bfin_read_EMAC_ADDRHI());
1042 /*todo: how to proble? which is revision_register */
1043 bfin_write_EMAC_ADDRLO(0x12345678);
1044 if (bfin_read_EMAC_ADDRLO() != 0x12345678) {
1045 dev_err(&pdev->dev, "Cannot detect Blackfin on-chip ethernet MAC controller!\n");
1047 goto out_err_probe_mac;
1050 /* set the GPIO pins to Ethernet mode */
1051 rc = peripheral_request_list(pin_req, DRV_NAME);
1053 dev_err(&pdev->dev, "Requesting peripherals failed!\n");
1055 goto out_err_setup_pin_mux;
1059 * Is it valid? (Did bootloader initialize it?)
1060 * Grab the MAC from the board somehow
1061 * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c
1063 if (!is_valid_ether_addr(ndev->dev_addr))
1064 bfin_get_ether_addr(ndev->dev_addr);
1066 /* If still not valid, get a random one */
1067 if (!is_valid_ether_addr(ndev->dev_addr))
1068 random_ether_addr(ndev->dev_addr);
1070 setup_mac_addr(ndev->dev_addr);
1072 /* MDIO bus initial */
1073 lp->mii_bus = mdiobus_alloc();
1074 if (lp->mii_bus == NULL)
1075 goto out_err_mdiobus_alloc;
1077 lp->mii_bus->priv = ndev;
1078 lp->mii_bus->read = bfin_mdiobus_read;
1079 lp->mii_bus->write = bfin_mdiobus_write;
1080 lp->mii_bus->reset = bfin_mdiobus_reset;
1081 lp->mii_bus->name = "bfin_mac_mdio";
1082 snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "0");
1083 lp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
1084 for (i = 0; i < PHY_MAX_ADDR; ++i)
1085 lp->mii_bus->irq[i] = PHY_POLL;
1087 rc = mdiobus_register(lp->mii_bus);
1089 dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
1090 goto out_err_mdiobus_register;
1093 rc = mii_probe(ndev);
1095 dev_err(&pdev->dev, "MII Probe failed!\n");
1096 goto out_err_mii_probe;
1099 /* Fill in the fields of the device structure with ethernet values. */
1102 ndev->netdev_ops = &bfin_mac_netdev_ops;
1103 ndev->ethtool_ops = &bfin_mac_ethtool_ops;
1105 spin_lock_init(&lp->lock);
1107 /* now, enable interrupts */
1108 /* register irq handler */
1109 rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt,
1110 IRQF_DISABLED | IRQF_SHARED, "EMAC_RX", ndev);
1112 dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n");
1114 goto out_err_request_irq;
1117 rc = register_netdev(ndev);
1119 dev_err(&pdev->dev, "Cannot register net device!\n");
1120 goto out_err_reg_ndev;
1123 /* now, print out the card info, in a short format.. */
1124 dev_info(&pdev->dev, "%s, Version %s\n", DRV_DESC, DRV_VERSION);
1129 free_irq(IRQ_MAC_RX, ndev);
1130 out_err_request_irq:
1132 mdiobus_unregister(lp->mii_bus);
1133 out_err_mdiobus_register:
1134 mdiobus_free(lp->mii_bus);
1135 out_err_mdiobus_alloc:
1136 peripheral_free_list(pin_req);
1137 out_err_setup_pin_mux:
1139 platform_set_drvdata(pdev, NULL);
1145 static int __devexit bfin_mac_remove(struct platform_device *pdev)
1147 struct net_device *ndev = platform_get_drvdata(pdev);
1148 struct bfin_mac_local *lp = netdev_priv(ndev);
1150 platform_set_drvdata(pdev, NULL);
1152 mdiobus_unregister(lp->mii_bus);
1153 mdiobus_free(lp->mii_bus);
1155 unregister_netdev(ndev);
1157 free_irq(IRQ_MAC_RX, ndev);
1161 peripheral_free_list(pin_req);
1167 static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg)
1169 struct net_device *net_dev = platform_get_drvdata(pdev);
1171 if (netif_running(net_dev))
1172 bfin_mac_close(net_dev);
1177 static int bfin_mac_resume(struct platform_device *pdev)
1179 struct net_device *net_dev = platform_get_drvdata(pdev);
1181 if (netif_running(net_dev))
1182 bfin_mac_open(net_dev);
1187 #define bfin_mac_suspend NULL
1188 #define bfin_mac_resume NULL
1189 #endif /* CONFIG_PM */
1191 static struct platform_driver bfin_mac_driver = {
1192 .probe = bfin_mac_probe,
1193 .remove = __devexit_p(bfin_mac_remove),
1194 .resume = bfin_mac_resume,
1195 .suspend = bfin_mac_suspend,
1198 .owner = THIS_MODULE,
1202 static int __init bfin_mac_init(void)
1204 return platform_driver_register(&bfin_mac_driver);
1207 module_init(bfin_mac_init);
1209 static void __exit bfin_mac_cleanup(void)
1211 platform_driver_unregister(&bfin_mac_driver);
1214 module_exit(bfin_mac_cleanup);