/* * Blackfin On-Chip MAC Driver * * Copyright 2004-2007 Analog Devices Inc. * * Enter bugs at http://blackfin.uclinux.org/ * * Licensed under the GPL-2 or later. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bfin_mac.h" #define DRV_NAME "bfin_mac" #define DRV_VERSION "1.1" #define DRV_AUTHOR "Bryan Wu, Luke Yang" #define DRV_DESC "Blackfin on-chip Ethernet MAC driver" MODULE_AUTHOR(DRV_AUTHOR); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION(DRV_DESC); MODULE_ALIAS("platform:bfin_mac"); #if defined(CONFIG_BFIN_MAC_USE_L1) # define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size) # define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr) #else # define bfin_mac_alloc(dma_handle, size) \ dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL) # define bfin_mac_free(dma_handle, ptr) \ dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle) #endif #define PKT_BUF_SZ 1580 #define MAX_TIMEOUT_CNT 500 /* pointers to maintain transmit list */ static struct net_dma_desc_tx *tx_list_head; static struct net_dma_desc_tx *tx_list_tail; static struct net_dma_desc_rx *rx_list_head; static struct net_dma_desc_rx *rx_list_tail; static struct net_dma_desc_rx *current_rx_ptr; static struct net_dma_desc_tx *current_tx_ptr; static struct net_dma_desc_tx *tx_desc; static struct net_dma_desc_rx *rx_desc; #if defined(CONFIG_BFIN_MAC_RMII) static u16 pin_req[] = P_RMII0; #else static u16 pin_req[] = P_MII0; #endif static void bfin_mac_disable(void); static void bfin_mac_enable(void); static void desc_list_free(void) { struct net_dma_desc_rx *r; struct net_dma_desc_tx *t; int i; #if !defined(CONFIG_BFIN_MAC_USE_L1) dma_addr_t dma_handle = 0; #endif if (tx_desc) { t = tx_list_head; for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { if (t) { if (t->skb) { dev_kfree_skb(t->skb); t->skb = NULL; } t = t->next; } } bfin_mac_free(dma_handle, tx_desc); } if (rx_desc) { r = rx_list_head; for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { if (r) { if (r->skb) { dev_kfree_skb(r->skb); r->skb = NULL; } r = r->next; } } bfin_mac_free(dma_handle, rx_desc); } } static int desc_list_init(void) { int i; struct sk_buff *new_skb; #if !defined(CONFIG_BFIN_MAC_USE_L1) /* * This dma_handle is useless in Blackfin dma_alloc_coherent(). * The real dma handler is the return value of dma_alloc_coherent(). */ dma_addr_t dma_handle; #endif tx_desc = bfin_mac_alloc(&dma_handle, sizeof(struct net_dma_desc_tx) * CONFIG_BFIN_TX_DESC_NUM); if (tx_desc == NULL) goto init_error; rx_desc = bfin_mac_alloc(&dma_handle, sizeof(struct net_dma_desc_rx) * CONFIG_BFIN_RX_DESC_NUM); if (rx_desc == NULL) goto init_error; /* init tx_list */ tx_list_head = tx_list_tail = tx_desc; for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { struct net_dma_desc_tx *t = tx_desc + i; struct dma_descriptor *a = &(t->desc_a); struct dma_descriptor *b = &(t->desc_b); /* * disable DMA * read from memory WNR = 0 * wordsize is 32 bits * 6 half words is desc size * large desc flow */ a->config = WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; a->start_addr = (unsigned long)t->packet; a->x_count = 0; a->next_dma_desc = b; /* * enabled DMA * write to memory WNR = 1 * wordsize is 32 bits * disable interrupt * 6 half words is desc size * large desc flow */ b->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; b->start_addr = (unsigned long)(&(t->status)); b->x_count = 0; t->skb = NULL; tx_list_tail->desc_b.next_dma_desc = a; tx_list_tail->next = t; tx_list_tail = t; } tx_list_tail->next = tx_list_head; /* tx_list is a circle */ tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a); current_tx_ptr = tx_list_head; /* init rx_list */ rx_list_head = rx_list_tail = rx_desc; for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { struct net_dma_desc_rx *r = rx_desc + i; struct dma_descriptor *a = &(r->desc_a); struct dma_descriptor *b = &(r->desc_b); /* allocate a new skb for next time receive */ new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN); if (!new_skb) { printk(KERN_NOTICE DRV_NAME ": init: low on mem - packet dropped\n"); goto init_error; } skb_reserve(new_skb, NET_IP_ALIGN); /* Invidate the data cache of skb->data range when it is write back * cache. It will prevent overwritting the new data from DMA */ blackfin_dcache_invalidate_range((unsigned long)new_skb->head, (unsigned long)new_skb->end); r->skb = new_skb; /* * enabled DMA * write to memory WNR = 1 * wordsize is 32 bits * disable interrupt * 6 half words is desc size * large desc flow */ a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; /* since RXDWA is enabled */ a->start_addr = (unsigned long)new_skb->data - 2; a->x_count = 0; a->next_dma_desc = b; /* * enabled DMA * write to memory WNR = 1 * wordsize is 32 bits * enable interrupt * 6 half words is desc size * large desc flow */ b->config = DMAEN | WNR | WDSIZE_32 | DI_EN | NDSIZE_6 | DMAFLOW_LARGE; b->start_addr = (unsigned long)(&(r->status)); b->x_count = 0; rx_list_tail->desc_b.next_dma_desc = a; rx_list_tail->next = r; rx_list_tail = r; } rx_list_tail->next = rx_list_head; /* rx_list is a circle */ rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a); current_rx_ptr = rx_list_head; return 0; init_error: desc_list_free(); printk(KERN_ERR DRV_NAME ": kmalloc failed\n"); return -ENOMEM; } /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ /* * MII operations */ /* Wait until the previous MDC/MDIO transaction has completed */ static void bfin_mdio_poll(void) { int timeout_cnt = MAX_TIMEOUT_CNT; /* poll the STABUSY bit */ while ((bfin_read_EMAC_STAADD()) & STABUSY) { udelay(1); if (timeout_cnt-- < 0) { printk(KERN_ERR DRV_NAME ": wait MDC/MDIO transaction to complete timeout\n"); break; } } } /* Read an off-chip register in a PHY through the MDC/MDIO port */ static int bfin_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum) { bfin_mdio_poll(); /* read mode */ bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | SET_REGAD((u16) regnum) | STABUSY); bfin_mdio_poll(); return (int) bfin_read_EMAC_STADAT(); } /* Write an off-chip register in a PHY through the MDC/MDIO port */ static int bfin_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, u16 value) { bfin_mdio_poll(); bfin_write_EMAC_STADAT((u32) value); /* write mode */ bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | SET_REGAD((u16) regnum) | STAOP | STABUSY); bfin_mdio_poll(); return 0; } static int bfin_mdiobus_reset(struct mii_bus *bus) { return 0; } static void bfin_mac_adjust_link(struct net_device *dev) { struct bfin_mac_local *lp = netdev_priv(dev); struct phy_device *phydev = lp->phydev; unsigned long flags; int new_state = 0; spin_lock_irqsave(&lp->lock, flags); if (phydev->link) { /* Now we make sure that we can be in full duplex mode. * If not, we operate in half-duplex mode. */ if (phydev->duplex != lp->old_duplex) { u32 opmode = bfin_read_EMAC_OPMODE(); new_state = 1; if (phydev->duplex) opmode |= FDMODE; else opmode &= ~(FDMODE); bfin_write_EMAC_OPMODE(opmode); lp->old_duplex = phydev->duplex; } if (phydev->speed != lp->old_speed) { #if defined(CONFIG_BFIN_MAC_RMII) u32 opmode = bfin_read_EMAC_OPMODE(); switch (phydev->speed) { case 10: opmode |= RMII_10; break; case 100: opmode &= ~(RMII_10); break; default: printk(KERN_WARNING "%s: Ack! Speed (%d) is not 10/100!\n", DRV_NAME, phydev->speed); break; } bfin_write_EMAC_OPMODE(opmode); #endif new_state = 1; lp->old_speed = phydev->speed; } if (!lp->old_link) { new_state = 1; lp->old_link = 1; } } else if (lp->old_link) { new_state = 1; lp->old_link = 0; lp->old_speed = 0; lp->old_duplex = -1; } if (new_state) { u32 opmode = bfin_read_EMAC_OPMODE(); phy_print_status(phydev); pr_debug("EMAC_OPMODE = 0x%08x\n", opmode); } spin_unlock_irqrestore(&lp->lock, flags); } /* MDC = 2.5 MHz */ #define MDC_CLK 2500000 static int mii_probe(struct net_device *dev) { struct bfin_mac_local *lp = netdev_priv(dev); struct phy_device *phydev = NULL; unsigned short sysctl; int i; u32 sclk, mdc_div; /* Enable PHY output early */ if (!(bfin_read_VR_CTL() & CLKBUFOE)) bfin_write_VR_CTL(bfin_read_VR_CTL() | CLKBUFOE); sclk = get_sclk(); mdc_div = ((sclk / MDC_CLK) / 2) - 1; sysctl = bfin_read_EMAC_SYSCTL(); sysctl = (sysctl & ~MDCDIV) | SET_MDCDIV(mdc_div); bfin_write_EMAC_SYSCTL(sysctl); /* search for connect PHY device */ for (i = 0; i < PHY_MAX_ADDR; i++) { struct phy_device *const tmp_phydev = lp->mii_bus->phy_map[i]; if (!tmp_phydev) continue; /* no PHY here... */ phydev = tmp_phydev; break; /* found it */ } /* now we are supposed to have a proper phydev, to attach to... */ if (!phydev) { printk(KERN_INFO "%s: Don't found any phy device at all\n", dev->name); return -ENODEV; } #if defined(CONFIG_BFIN_MAC_RMII) phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link, 0, PHY_INTERFACE_MODE_RMII); #else phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link, 0, PHY_INTERFACE_MODE_MII); #endif if (IS_ERR(phydev)) { printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); return PTR_ERR(phydev); } /* mask with MAC supported features */ phydev->supported &= (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | SUPPORTED_Autoneg | SUPPORTED_Pause | SUPPORTED_Asym_Pause | SUPPORTED_MII | SUPPORTED_TP); phydev->advertising = phydev->supported; lp->old_link = 0; lp->old_speed = 0; lp->old_duplex = -1; lp->phydev = phydev; printk(KERN_INFO "%s: attached PHY driver [%s] " "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)" "@sclk=%dMHz)\n", DRV_NAME, phydev->drv->name, dev_name(&phydev->dev), phydev->irq, MDC_CLK, mdc_div, sclk/1000000); return 0; } /* * Ethtool support */ /* * interrupt routine for magic packet wakeup */ static irqreturn_t bfin_mac_wake_interrupt(int irq, void *dev_id) { return IRQ_HANDLED; } static int bfin_mac_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd) { struct bfin_mac_local *lp = netdev_priv(dev); if (lp->phydev) return phy_ethtool_gset(lp->phydev, cmd); return -EINVAL; } static int bfin_mac_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd) { struct bfin_mac_local *lp = netdev_priv(dev); if (!capable(CAP_NET_ADMIN)) return -EPERM; if (lp->phydev) return phy_ethtool_sset(lp->phydev, cmd); return -EINVAL; } static void bfin_mac_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { strcpy(info->driver, DRV_NAME); strcpy(info->version, DRV_VERSION); strcpy(info->fw_version, "N/A"); strcpy(info->bus_info, dev_name(&dev->dev)); } static void bfin_mac_ethtool_getwol(struct net_device *dev, struct ethtool_wolinfo *wolinfo) { struct bfin_mac_local *lp = netdev_priv(dev); wolinfo->supported = WAKE_MAGIC; wolinfo->wolopts = lp->wol; } static int bfin_mac_ethtool_setwol(struct net_device *dev, struct ethtool_wolinfo *wolinfo) { struct bfin_mac_local *lp = netdev_priv(dev); int rc; if (wolinfo->wolopts & (WAKE_MAGICSECURE | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_ARP)) return -EOPNOTSUPP; lp->wol = wolinfo->wolopts; if (lp->wol && !lp->irq_wake_requested) { /* register wake irq handler */ rc = request_irq(IRQ_MAC_WAKEDET, bfin_mac_wake_interrupt, IRQF_DISABLED, "EMAC_WAKE", dev); if (rc) return rc; lp->irq_wake_requested = true; } if (!lp->wol && lp->irq_wake_requested) { free_irq(IRQ_MAC_WAKEDET, dev); lp->irq_wake_requested = false; } /* Make sure the PHY driver doesn't suspend */ device_init_wakeup(&dev->dev, lp->wol); return 0; } static const struct ethtool_ops bfin_mac_ethtool_ops = { .get_settings = bfin_mac_ethtool_getsettings, .set_settings = bfin_mac_ethtool_setsettings, .get_link = ethtool_op_get_link, .get_drvinfo = bfin_mac_ethtool_getdrvinfo, .get_wol = bfin_mac_ethtool_getwol, .set_wol = bfin_mac_ethtool_setwol, }; /**************************************************************************/ void setup_system_regs(struct net_device *dev) { unsigned short sysctl; /* * Odd word alignment for Receive Frame DMA word * Configure checksum support and rcve frame word alignment */ sysctl = bfin_read_EMAC_SYSCTL(); sysctl |= RXDWA; #if defined(BFIN_MAC_CSUM_OFFLOAD) sysctl |= RXCKS; #else sysctl &= ~RXCKS; #endif bfin_write_EMAC_SYSCTL(sysctl); bfin_write_EMAC_MMC_CTL(RSTC | CROLL); /* Initialize the TX DMA channel registers */ bfin_write_DMA2_X_COUNT(0); bfin_write_DMA2_X_MODIFY(4); bfin_write_DMA2_Y_COUNT(0); bfin_write_DMA2_Y_MODIFY(0); /* Initialize the RX DMA channel registers */ bfin_write_DMA1_X_COUNT(0); bfin_write_DMA1_X_MODIFY(4); bfin_write_DMA1_Y_COUNT(0); bfin_write_DMA1_Y_MODIFY(0); } static void setup_mac_addr(u8 *mac_addr) { u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]); u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]); /* this depends on a little-endian machine */ bfin_write_EMAC_ADDRLO(addr_low); bfin_write_EMAC_ADDRHI(addr_hi); } static int bfin_mac_set_mac_address(struct net_device *dev, void *p) { struct sockaddr *addr = p; if (netif_running(dev)) return -EBUSY; memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); setup_mac_addr(dev->dev_addr); return 0; } #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP #define bfin_mac_hwtstamp_is_none(cfg) ((cfg) == HWTSTAMP_FILTER_NONE) static int bfin_mac_hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) { struct hwtstamp_config config; struct bfin_mac_local *lp = netdev_priv(netdev); u16 ptpctl; u32 ptpfv1, ptpfv2, ptpfv3, ptpfoff; if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) return -EFAULT; pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n", __func__, config.flags, config.tx_type, config.rx_filter); /* reserved for future extensions */ if (config.flags) return -EINVAL; if ((config.tx_type != HWTSTAMP_TX_OFF) && (config.tx_type != HWTSTAMP_TX_ON)) return -ERANGE; ptpctl = bfin_read_EMAC_PTP_CTL(); switch (config.rx_filter) { case HWTSTAMP_FILTER_NONE: /* * Dont allow any timestamping */ ptpfv3 = 0xFFFFFFFF; bfin_write_EMAC_PTP_FV3(ptpfv3); break; case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: /* * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL) * to enable all the field matches. */ ptpctl &= ~0x1F00; bfin_write_EMAC_PTP_CTL(ptpctl); /* * Keep the default values of the EMAC_PTP_FOFF register. */ ptpfoff = 0x4A24170C; bfin_write_EMAC_PTP_FOFF(ptpfoff); /* * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 * registers. */ ptpfv1 = 0x11040800; bfin_write_EMAC_PTP_FV1(ptpfv1); ptpfv2 = 0x0140013F; bfin_write_EMAC_PTP_FV2(ptpfv2); /* * The default value (0xFFFC) allows the timestamping of both * received Sync messages and Delay_Req messages. */ ptpfv3 = 0xFFFFFFFC; bfin_write_EMAC_PTP_FV3(ptpfv3); config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; break; case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: /* Clear all five comparison mask bits (bits[12:8]) in the * EMAC_PTP_CTL register to enable all the field matches. */ ptpctl &= ~0x1F00; bfin_write_EMAC_PTP_CTL(ptpctl); /* * Keep the default values of the EMAC_PTP_FOFF register, except set * the PTPCOF field to 0x2A. */ ptpfoff = 0x2A24170C; bfin_write_EMAC_PTP_FOFF(ptpfoff); /* * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 * registers. */ ptpfv1 = 0x11040800; bfin_write_EMAC_PTP_FV1(ptpfv1); ptpfv2 = 0x0140013F; bfin_write_EMAC_PTP_FV2(ptpfv2); /* * To allow the timestamping of Pdelay_Req and Pdelay_Resp, set * the value to 0xFFF0. */ ptpfv3 = 0xFFFFFFF0; bfin_write_EMAC_PTP_FV3(ptpfv3); config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; break; case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: /* * Clear bits 8 and 12 of the EMAC_PTP_CTL register to enable only the * EFTM and PTPCM field comparison. */ ptpctl &= ~0x1100; bfin_write_EMAC_PTP_CTL(ptpctl); /* * Keep the default values of all the fields of the EMAC_PTP_FOFF * register, except set the PTPCOF field to 0x0E. */ ptpfoff = 0x0E24170C; bfin_write_EMAC_PTP_FOFF(ptpfoff); /* * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which * corresponds to PTP messages on the MAC layer. */ ptpfv1 = 0x110488F7; bfin_write_EMAC_PTP_FV1(ptpfv1); ptpfv2 = 0x0140013F; bfin_write_EMAC_PTP_FV2(ptpfv2); /* * To allow the timestamping of Pdelay_Req and Pdelay_Resp * messages, set the value to 0xFFF0. */ ptpfv3 = 0xFFFFFFF0; bfin_write_EMAC_PTP_FV3(ptpfv3); config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; break; default: return -ERANGE; } if (config.tx_type == HWTSTAMP_TX_OFF && bfin_mac_hwtstamp_is_none(config.rx_filter)) { ptpctl &= ~PTP_EN; bfin_write_EMAC_PTP_CTL(ptpctl); SSYNC(); } else { ptpctl |= PTP_EN; bfin_write_EMAC_PTP_CTL(ptpctl); /* * clear any existing timestamp */ bfin_read_EMAC_PTP_RXSNAPLO(); bfin_read_EMAC_PTP_RXSNAPHI(); bfin_read_EMAC_PTP_TXSNAPLO(); bfin_read_EMAC_PTP_TXSNAPHI(); /* * Set registers so that rollover occurs soon to test this. */ bfin_write_EMAC_PTP_TIMELO(0x00000000); bfin_write_EMAC_PTP_TIMEHI(0xFF800000); SSYNC(); lp->compare.last_update = 0; timecounter_init(&lp->clock, &lp->cycles, ktime_to_ns(ktime_get_real())); timecompare_update(&lp->compare, 0); } lp->stamp_cfg = config; return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0; } static void bfin_dump_hwtamp(char *s, ktime_t *hw, ktime_t *ts, struct timecompare *cmp) { ktime_t sys = ktime_get_real(); pr_debug("%s %s hardware:%d,%d transform system:%d,%d system:%d,%d, cmp:%lld, %lld\n", __func__, s, hw->tv.sec, hw->tv.nsec, ts->tv.sec, ts->tv.nsec, sys.tv.sec, sys.tv.nsec, cmp->offset, cmp->skew); } static void bfin_tx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) { struct bfin_mac_local *lp = netdev_priv(netdev); union skb_shared_tx *shtx = skb_tx(skb); if (shtx->hardware) { int timeout_cnt = MAX_TIMEOUT_CNT; /* When doing time stamping, keep the connection to the socket * a while longer */ shtx->in_progress = 1; /* * The timestamping is done at the EMAC module's MII/RMII interface * when the module sees the Start of Frame of an event message packet. This * interface is the closest possible place to the physical Ethernet transmission * medium, providing the best timing accuracy. */ while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL)) && (--timeout_cnt)) udelay(1); if (timeout_cnt == 0) printk(KERN_ERR DRV_NAME ": fails to timestamp the TX packet\n"); else { struct skb_shared_hwtstamps shhwtstamps; u64 ns; u64 regval; regval = bfin_read_EMAC_PTP_TXSNAPLO(); regval |= (u64)bfin_read_EMAC_PTP_TXSNAPHI() << 32; memset(&shhwtstamps, 0, sizeof(shhwtstamps)); ns = timecounter_cyc2time(&lp->clock, regval); timecompare_update(&lp->compare, ns); shhwtstamps.hwtstamp = ns_to_ktime(ns); shhwtstamps.syststamp = timecompare_transform(&lp->compare, ns); skb_tstamp_tx(skb, &shhwtstamps); bfin_dump_hwtamp("TX", &shhwtstamps.hwtstamp, &shhwtstamps.syststamp, &lp->compare); } } } static void bfin_rx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) { struct bfin_mac_local *lp = netdev_priv(netdev); u32 valid; u64 regval, ns; struct skb_shared_hwtstamps *shhwtstamps; if (bfin_mac_hwtstamp_is_none(lp->stamp_cfg.rx_filter)) return; valid = bfin_read_EMAC_PTP_ISTAT() & RXEL; if (!valid) return; shhwtstamps = skb_hwtstamps(skb); regval = bfin_read_EMAC_PTP_RXSNAPLO(); regval |= (u64)bfin_read_EMAC_PTP_RXSNAPHI() << 32; ns = timecounter_cyc2time(&lp->clock, regval); timecompare_update(&lp->compare, ns); memset(shhwtstamps, 0, sizeof(*shhwtstamps)); shhwtstamps->hwtstamp = ns_to_ktime(ns); shhwtstamps->syststamp = timecompare_transform(&lp->compare, ns); bfin_dump_hwtamp("RX", &shhwtstamps->hwtstamp, &shhwtstamps->syststamp, &lp->compare); } /* * bfin_read_clock - read raw cycle counter (to be used by time counter) */ static cycle_t bfin_read_clock(const struct cyclecounter *tc) { u64 stamp; stamp = bfin_read_EMAC_PTP_TIMELO(); stamp |= (u64)bfin_read_EMAC_PTP_TIMEHI() << 32ULL; return stamp; } #define PTP_CLK 25000000 static void bfin_mac_hwtstamp_init(struct net_device *netdev) { struct bfin_mac_local *lp = netdev_priv(netdev); u64 append; /* Initialize hardware timer */ append = PTP_CLK * (1ULL << 32); do_div(append, get_sclk()); bfin_write_EMAC_PTP_ADDEND((u32)append); memset(&lp->cycles, 0, sizeof(lp->cycles)); lp->cycles.read = bfin_read_clock; lp->cycles.mask = CLOCKSOURCE_MASK(64); lp->cycles.mult = 1000000000 / PTP_CLK; lp->cycles.shift = 0; /* Synchronize our NIC clock against system wall clock */ memset(&lp->compare, 0, sizeof(lp->compare)); lp->compare.source = &lp->clock; lp->compare.target = ktime_get_real; lp->compare.num_samples = 10; /* Initialize hwstamp config */ lp->stamp_cfg.rx_filter = HWTSTAMP_FILTER_NONE; lp->stamp_cfg.tx_type = HWTSTAMP_TX_OFF; } #else # define bfin_mac_hwtstamp_is_none(cfg) 0 # define bfin_mac_hwtstamp_init(dev) # define bfin_mac_hwtstamp_ioctl(dev, ifr, cmd) (-EOPNOTSUPP) # define bfin_rx_hwtstamp(dev, skb) # define bfin_tx_hwtstamp(dev, skb) #endif static void adjust_tx_list(void) { int timeout_cnt = MAX_TIMEOUT_CNT; if (tx_list_head->status.status_word != 0 && current_tx_ptr != tx_list_head) { goto adjust_head; /* released something, just return; */ } /* * if nothing released, check wait condition * current's next can not be the head, * otherwise the dma will not stop as we want */ if (current_tx_ptr->next->next == tx_list_head) { while (tx_list_head->status.status_word == 0) { udelay(10); if (tx_list_head->status.status_word != 0 || !(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)) { goto adjust_head; } if (timeout_cnt-- < 0) { printk(KERN_ERR DRV_NAME ": wait for adjust tx list head timeout\n"); break; } } if (tx_list_head->status.status_word != 0) { goto adjust_head; } } return; adjust_head: do { tx_list_head->desc_a.config &= ~DMAEN; tx_list_head->status.status_word = 0; if (tx_list_head->skb) { dev_kfree_skb(tx_list_head->skb); tx_list_head->skb = NULL; } else { printk(KERN_ERR DRV_NAME ": no sk_buff in a transmitted frame!\n"); } tx_list_head = tx_list_head->next; } while (tx_list_head->status.status_word != 0 && current_tx_ptr != tx_list_head); return; } static int bfin_mac_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { u16 *data; u32 data_align = (unsigned long)(skb->data) & 0x3; union skb_shared_tx *shtx = skb_tx(skb); current_tx_ptr->skb = skb; if (data_align == 0x2) { /* move skb->data to current_tx_ptr payload */ data = (u16 *)(skb->data) - 1; *data = (u16)(skb->len); /* * When transmitting an Ethernet packet, the PTP_TSYNC module requires * a DMA_Length_Word field associated with the packet. The lower 12 bits * of this field are the length of the packet payload in bytes and the higher * 4 bits are the timestamping enable field. */ if (shtx->hardware) *data |= 0x1000; current_tx_ptr->desc_a.start_addr = (u32)data; /* this is important! */ blackfin_dcache_flush_range((u32)data, (u32)((u8 *)data + skb->len + 4)); } else { *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len); /* enable timestamping for the sent packet */ if (shtx->hardware) *((u16 *)(current_tx_ptr->packet)) |= 0x1000; memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data, skb->len); current_tx_ptr->desc_a.start_addr = (u32)current_tx_ptr->packet; if (current_tx_ptr->status.status_word != 0) current_tx_ptr->status.status_word = 0; blackfin_dcache_flush_range( (u32)current_tx_ptr->packet, (u32)(current_tx_ptr->packet + skb->len + 2)); } /* make sure the internal data buffers in the core are drained * so that the DMA descriptors are completely written when the * DMA engine goes to fetch them below */ SSYNC(); /* enable this packet's dma */ current_tx_ptr->desc_a.config |= DMAEN; /* tx dma is running, just return */ if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN) goto out; /* tx dma is not running */ bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a)); /* dma enabled, read from memory, size is 6 */ bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config); /* Turn on the EMAC tx */ bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); out: adjust_tx_list(); bfin_tx_hwtstamp(dev, skb); current_tx_ptr = current_tx_ptr->next; dev->stats.tx_packets++; dev->stats.tx_bytes += (skb->len); return NETDEV_TX_OK; } #define IP_HEADER_OFF 0 #define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \ RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE) static void bfin_mac_rx(struct net_device *dev) { struct sk_buff *skb, *new_skb; unsigned short len; struct bfin_mac_local *lp __maybe_unused = netdev_priv(dev); #if defined(BFIN_MAC_CSUM_OFFLOAD) unsigned int i; unsigned char fcs[ETH_FCS_LEN + 1]; #endif /* check if frame status word reports an error condition * we which case we simply drop the packet */ if (current_rx_ptr->status.status_word & RX_ERROR_MASK) { printk(KERN_NOTICE DRV_NAME ": rx: receive error - packet dropped\n"); dev->stats.rx_dropped++; goto out; } /* allocate a new skb for next time receive */ skb = current_rx_ptr->skb; new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN); if (!new_skb) { printk(KERN_NOTICE DRV_NAME ": rx: low on mem - packet dropped\n"); dev->stats.rx_dropped++; goto out; } /* reserve 2 bytes for RXDWA padding */ skb_reserve(new_skb, NET_IP_ALIGN); /* Invidate the data cache of skb->data range when it is write back * cache. It will prevent overwritting the new data from DMA */ blackfin_dcache_invalidate_range((unsigned long)new_skb->head, (unsigned long)new_skb->end); current_rx_ptr->skb = new_skb; current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2; len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN); /* Deduce Ethernet FCS length from Ethernet payload length */ len -= ETH_FCS_LEN; skb_put(skb, len); skb->protocol = eth_type_trans(skb, dev); bfin_rx_hwtstamp(dev, skb); #if defined(BFIN_MAC_CSUM_OFFLOAD) /* Checksum offloading only works for IPv4 packets with the standard IP header * length of 20 bytes, because the blackfin MAC checksum calculation is * based on that assumption. We must NOT use the calculated checksum if our * IP version or header break that assumption. */ if (skb->data[IP_HEADER_OFF] == 0x45) { skb->csum = current_rx_ptr->status.ip_payload_csum; /* * Deduce Ethernet FCS from hardware generated IP payload checksum. * IP checksum is based on 16-bit one's complement algorithm. * To deduce a value from checksum is equal to add its inversion. * If the IP payload len is odd, the inversed FCS should also * begin from odd address and leave first byte zero. */ if (skb->len % 2) { fcs[0] = 0; for (i = 0; i < ETH_FCS_LEN; i++) fcs[i + 1] = ~skb->data[skb->len + i]; skb->csum = csum_partial(fcs, ETH_FCS_LEN + 1, skb->csum); } else { for (i = 0; i < ETH_FCS_LEN; i++) fcs[i] = ~skb->data[skb->len + i]; skb->csum = csum_partial(fcs, ETH_FCS_LEN, skb->csum); } skb->ip_summed = CHECKSUM_COMPLETE; } #endif netif_rx(skb); dev->stats.rx_packets++; dev->stats.rx_bytes += len; out: current_rx_ptr->status.status_word = 0x00000000; current_rx_ptr = current_rx_ptr->next; } /* interrupt routine to handle rx and error signal */ static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; int number = 0; get_one_packet: if (current_rx_ptr->status.status_word == 0) { /* no more new packet received */ if (number == 0) { if (current_rx_ptr->next->status.status_word != 0) { current_rx_ptr = current_rx_ptr->next; goto real_rx; } } bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() | DMA_DONE | DMA_ERR); return IRQ_HANDLED; } real_rx: bfin_mac_rx(dev); number++; goto get_one_packet; } #ifdef CONFIG_NET_POLL_CONTROLLER static void bfin_mac_poll(struct net_device *dev) { disable_irq(IRQ_MAC_RX); bfin_mac_interrupt(IRQ_MAC_RX, dev); enable_irq(IRQ_MAC_RX); } #endif /* CONFIG_NET_POLL_CONTROLLER */ static void bfin_mac_disable(void) { unsigned int opmode; opmode = bfin_read_EMAC_OPMODE(); opmode &= (~RE); opmode &= (~TE); /* Turn off the EMAC */ bfin_write_EMAC_OPMODE(opmode); } /* * Enable Interrupts, Receive, and Transmit */ static void bfin_mac_enable(void) { u32 opmode; pr_debug("%s: %s\n", DRV_NAME, __func__); /* Set RX DMA */ bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a)); bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config); /* Wait MII done */ bfin_mdio_poll(); /* We enable only RX here */ /* ASTP : Enable Automatic Pad Stripping PR : Promiscuous Mode for test PSF : Receive frames with total length less than 64 bytes. FDMODE : Full Duplex Mode LB : Internal Loopback for test RE : Receiver Enable */ opmode = bfin_read_EMAC_OPMODE(); if (opmode & FDMODE) opmode |= PSF; else opmode |= DRO | DC | PSF; opmode |= RE; #if defined(CONFIG_BFIN_MAC_RMII) opmode |= RMII; /* For Now only 100MBit are supported */ #if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2 opmode |= TE; #endif #endif /* Turn on the EMAC rx */ bfin_write_EMAC_OPMODE(opmode); } /* Our watchdog timed out. Called by the networking layer */ static void bfin_mac_timeout(struct net_device *dev) { pr_debug("%s: %s\n", dev->name, __func__); bfin_mac_disable(); /* reset tx queue */ tx_list_tail = tx_list_head->next; bfin_mac_enable(); /* We can accept TX packets again */ dev->trans_start = jiffies; /* prevent tx timeout */ netif_wake_queue(dev); } static void bfin_mac_multicast_hash(struct net_device *dev) { u32 emac_hashhi, emac_hashlo; struct netdev_hw_addr *ha; char *addrs; u32 crc; emac_hashhi = emac_hashlo = 0; netdev_for_each_mc_addr(ha, dev) { addrs = ha->addr; /* skip non-multicast addresses */ if (!(*addrs & 1)) continue; crc = ether_crc(ETH_ALEN, addrs); crc >>= 26; if (crc & 0x20) emac_hashhi |= 1 << (crc & 0x1f); else emac_hashlo |= 1 << (crc & 0x1f); } bfin_write_EMAC_HASHHI(emac_hashhi); bfin_write_EMAC_HASHLO(emac_hashlo); } /* * This routine will, depending on the values passed to it, * either make it accept multicast packets, go into * promiscuous mode (for TCPDUMP and cousins) or accept * a select set of multicast packets */ static void bfin_mac_set_multicast_list(struct net_device *dev) { u32 sysctl; if (dev->flags & IFF_PROMISC) { printk(KERN_INFO "%s: set to promisc mode\n", dev->name); sysctl = bfin_read_EMAC_OPMODE(); sysctl |= RAF; bfin_write_EMAC_OPMODE(sysctl); } else if (dev->flags & IFF_ALLMULTI) { /* accept all multicast */ sysctl = bfin_read_EMAC_OPMODE(); sysctl |= PAM; bfin_write_EMAC_OPMODE(sysctl); } else if (!netdev_mc_empty(dev)) { /* set up multicast hash table */ sysctl = bfin_read_EMAC_OPMODE(); sysctl |= HM; bfin_write_EMAC_OPMODE(sysctl); bfin_mac_multicast_hash(dev); } else { /* clear promisc or multicast mode */ sysctl = bfin_read_EMAC_OPMODE(); sysctl &= ~(RAF | PAM); bfin_write_EMAC_OPMODE(sysctl); } } static int bfin_mac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) { switch (cmd) { case SIOCSHWTSTAMP: return bfin_mac_hwtstamp_ioctl(netdev, ifr, cmd); default: return -EOPNOTSUPP; } } /* * this puts the device in an inactive state */ static void bfin_mac_shutdown(struct net_device *dev) { /* Turn off the EMAC */ bfin_write_EMAC_OPMODE(0x00000000); /* Turn off the EMAC RX DMA */ bfin_write_DMA1_CONFIG(0x0000); bfin_write_DMA2_CONFIG(0x0000); } /* * Open and Initialize the interface * * Set up everything, reset the card, etc.. */ static int bfin_mac_open(struct net_device *dev) { struct bfin_mac_local *lp = netdev_priv(dev); int retval; pr_debug("%s: %s\n", dev->name, __func__); /* * Check that the address is valid. If its not, refuse * to bring the device up. The user must specify an * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx */ if (!is_valid_ether_addr(dev->dev_addr)) { printk(KERN_WARNING DRV_NAME ": no valid ethernet hw addr\n"); return -EINVAL; } /* initial rx and tx list */ retval = desc_list_init(); if (retval) return retval; phy_start(lp->phydev); phy_write(lp->phydev, MII_BMCR, BMCR_RESET); setup_system_regs(dev); setup_mac_addr(dev->dev_addr); bfin_mac_disable(); bfin_mac_enable(); pr_debug("hardware init finished\n"); netif_start_queue(dev); netif_carrier_on(dev); return 0; } /* * this makes the board clean up everything that it can * and not talk to the outside world. Caused by * an 'ifconfig ethX down' */ static int bfin_mac_close(struct net_device *dev) { struct bfin_mac_local *lp = netdev_priv(dev); pr_debug("%s: %s\n", dev->name, __func__); netif_stop_queue(dev); netif_carrier_off(dev); phy_stop(lp->phydev); phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN); /* clear everything */ bfin_mac_shutdown(dev); /* free the rx/tx buffers */ desc_list_free(); return 0; } static const struct net_device_ops bfin_mac_netdev_ops = { .ndo_open = bfin_mac_open, .ndo_stop = bfin_mac_close, .ndo_start_xmit = bfin_mac_hard_start_xmit, .ndo_set_mac_address = bfin_mac_set_mac_address, .ndo_tx_timeout = bfin_mac_timeout, .ndo_set_multicast_list = bfin_mac_set_multicast_list, .ndo_do_ioctl = bfin_mac_ioctl, .ndo_validate_addr = eth_validate_addr, .ndo_change_mtu = eth_change_mtu, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = bfin_mac_poll, #endif }; static int __devinit bfin_mac_probe(struct platform_device *pdev) { struct net_device *ndev; struct bfin_mac_local *lp; struct platform_device *pd; int rc; ndev = alloc_etherdev(sizeof(struct bfin_mac_local)); if (!ndev) { dev_err(&pdev->dev, "Cannot allocate net device!\n"); return -ENOMEM; } SET_NETDEV_DEV(ndev, &pdev->dev); platform_set_drvdata(pdev, ndev); lp = netdev_priv(ndev); /* Grab the MAC address in the MAC */ *(__le32 *) (&(ndev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO()); *(__le16 *) (&(ndev->dev_addr[4])) = cpu_to_le16((u16) bfin_read_EMAC_ADDRHI()); /* probe mac */ /*todo: how to proble? which is revision_register */ bfin_write_EMAC_ADDRLO(0x12345678); if (bfin_read_EMAC_ADDRLO() != 0x12345678) { dev_err(&pdev->dev, "Cannot detect Blackfin on-chip ethernet MAC controller!\n"); rc = -ENODEV; goto out_err_probe_mac; } /* * Is it valid? (Did bootloader initialize it?) * Grab the MAC from the board somehow * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c */ if (!is_valid_ether_addr(ndev->dev_addr)) bfin_get_ether_addr(ndev->dev_addr); /* If still not valid, get a random one */ if (!is_valid_ether_addr(ndev->dev_addr)) random_ether_addr(ndev->dev_addr); setup_mac_addr(ndev->dev_addr); if (!pdev->dev.platform_data) { dev_err(&pdev->dev, "Cannot get platform device bfin_mii_bus!\n"); rc = -ENODEV; goto out_err_probe_mac; } pd = pdev->dev.platform_data; lp->mii_bus = platform_get_drvdata(pd); lp->mii_bus->priv = ndev; rc = mii_probe(ndev); if (rc) { dev_err(&pdev->dev, "MII Probe failed!\n"); goto out_err_mii_probe; } /* Fill in the fields of the device structure with ethernet values. */ ether_setup(ndev); ndev->netdev_ops = &bfin_mac_netdev_ops; ndev->ethtool_ops = &bfin_mac_ethtool_ops; spin_lock_init(&lp->lock); /* now, enable interrupts */ /* register irq handler */ rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt, IRQF_DISABLED, "EMAC_RX", ndev); if (rc) { dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n"); rc = -EBUSY; goto out_err_request_irq; } rc = register_netdev(ndev); if (rc) { dev_err(&pdev->dev, "Cannot register net device!\n"); goto out_err_reg_ndev; } bfin_mac_hwtstamp_init(ndev); /* now, print out the card info, in a short format.. */ dev_info(&pdev->dev, "%s, Version %s\n", DRV_DESC, DRV_VERSION); return 0; out_err_reg_ndev: free_irq(IRQ_MAC_RX, ndev); out_err_request_irq: out_err_mii_probe: mdiobus_unregister(lp->mii_bus); mdiobus_free(lp->mii_bus); peripheral_free_list(pin_req); out_err_probe_mac: platform_set_drvdata(pdev, NULL); free_netdev(ndev); return rc; } static int __devexit bfin_mac_remove(struct platform_device *pdev) { struct net_device *ndev = platform_get_drvdata(pdev); struct bfin_mac_local *lp = netdev_priv(ndev); platform_set_drvdata(pdev, NULL); lp->mii_bus->priv = NULL; unregister_netdev(ndev); free_irq(IRQ_MAC_RX, ndev); free_netdev(ndev); peripheral_free_list(pin_req); return 0; } #ifdef CONFIG_PM static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg) { struct net_device *net_dev = platform_get_drvdata(pdev); struct bfin_mac_local *lp = netdev_priv(net_dev); if (lp->wol) { bfin_write_EMAC_OPMODE((bfin_read_EMAC_OPMODE() & ~TE) | RE); bfin_write_EMAC_WKUP_CTL(MPKE); enable_irq_wake(IRQ_MAC_WAKEDET); } else { if (netif_running(net_dev)) bfin_mac_close(net_dev); } return 0; } static int bfin_mac_resume(struct platform_device *pdev) { struct net_device *net_dev = platform_get_drvdata(pdev); struct bfin_mac_local *lp = netdev_priv(net_dev); if (lp->wol) { bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); bfin_write_EMAC_WKUP_CTL(0); disable_irq_wake(IRQ_MAC_WAKEDET); } else { if (netif_running(net_dev)) bfin_mac_open(net_dev); } return 0; } #else #define bfin_mac_suspend NULL #define bfin_mac_resume NULL #endif /* CONFIG_PM */ static int __devinit bfin_mii_bus_probe(struct platform_device *pdev) { struct mii_bus *miibus; int rc, i; /* * We are setting up a network card, * so set the GPIO pins to Ethernet mode */ rc = peripheral_request_list(pin_req, DRV_NAME); if (rc) { dev_err(&pdev->dev, "Requesting peripherals failed!\n"); return rc; } rc = -ENOMEM; miibus = mdiobus_alloc(); if (miibus == NULL) goto out_err_alloc; miibus->read = bfin_mdiobus_read; miibus->write = bfin_mdiobus_write; miibus->reset = bfin_mdiobus_reset; miibus->parent = &pdev->dev; miibus->name = "bfin_mii_bus"; snprintf(miibus->id, MII_BUS_ID_SIZE, "0"); miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); if (miibus->irq == NULL) goto out_err_alloc; for (i = 0; i < PHY_MAX_ADDR; ++i) miibus->irq[i] = PHY_POLL; rc = mdiobus_register(miibus); if (rc) { dev_err(&pdev->dev, "Cannot register MDIO bus!\n"); goto out_err_mdiobus_register; } platform_set_drvdata(pdev, miibus); return 0; out_err_mdiobus_register: mdiobus_free(miibus); out_err_alloc: peripheral_free_list(pin_req); return rc; } static int __devexit bfin_mii_bus_remove(struct platform_device *pdev) { struct mii_bus *miibus = platform_get_drvdata(pdev); platform_set_drvdata(pdev, NULL); mdiobus_unregister(miibus); mdiobus_free(miibus); peripheral_free_list(pin_req); return 0; } static struct platform_driver bfin_mii_bus_driver = { .probe = bfin_mii_bus_probe, .remove = __devexit_p(bfin_mii_bus_remove), .driver = { .name = "bfin_mii_bus", .owner = THIS_MODULE, }, }; static struct platform_driver bfin_mac_driver = { .probe = bfin_mac_probe, .remove = __devexit_p(bfin_mac_remove), .resume = bfin_mac_resume, .suspend = bfin_mac_suspend, .driver = { .name = DRV_NAME, .owner = THIS_MODULE, }, }; static int __init bfin_mac_init(void) { int ret; ret = platform_driver_register(&bfin_mii_bus_driver); if (!ret) return platform_driver_register(&bfin_mac_driver); return -ENODEV; } module_init(bfin_mac_init); static void __exit bfin_mac_cleanup(void) { platform_driver_unregister(&bfin_mac_driver); platform_driver_unregister(&bfin_mii_bus_driver); } module_exit(bfin_mac_cleanup);