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