From: Jeff Kirsher Date: Sat, 18 Jun 2011 07:01:26 +0000 (-0700) Subject: bfin_mac: Move the Analog Devices Inc driver X-Git-Tag: MMI-PSA29.97-13-9~18194^2~501 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7b35f03338a8557122e62ea1a011f1628b978e8d;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git bfin_mac: Move the Analog Devices Inc driver Move the Analog Devices Inc driver into drivers/net/ethernet/adi/ and make the necessary Kconfig and Makefile changes. CC: Signed-off-by: Jeff Kirsher Acked-by: Bob Liu --- diff --git a/MAINTAINERS b/MAINTAINERS index 879c17ebf38a..15d70213be53 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1446,7 +1446,7 @@ BLACKFIN EMAC DRIVER L: uclinux-dist-devel@blackfin.uclinux.org W: http://blackfin.uclinux.org S: Supported -F: drivers/net/bfin_mac.* +F: drivers/net/ethernet/adi/ BLACKFIN RTC DRIVER M: Mike Frysinger diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index fd333803be8c..10c25b5bb2fe 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -252,52 +252,6 @@ config SH_ETH This driver supporting CPUs are: - SH7710, SH7712, SH7763, SH7619, SH7724, and SH7757. -config BFIN_MAC - tristate "Blackfin on-chip MAC support" - depends on NET_ETHERNET && (BF516 || BF518 || BF526 || BF527 || BF536 || BF537) - select CRC32 - select MII - select PHYLIB - select BFIN_MAC_USE_L1 if DMA_UNCACHED_NONE - help - This is the driver for Blackfin on-chip mac device. Say Y if you want it - compiled into the kernel. This driver is also available as a module - ( = code which can be inserted in and removed from the running kernel - whenever you want). The module will be called bfin_mac. - -config BFIN_MAC_USE_L1 - bool "Use L1 memory for rx/tx packets" - depends on BFIN_MAC && (BF527 || BF537) - default y - help - To get maximum network performance, you should use L1 memory as rx/tx buffers. - Say N here if you want to reserve L1 memory for other uses. - -config BFIN_TX_DESC_NUM - int "Number of transmit buffer packets" - depends on BFIN_MAC - range 6 10 if BFIN_MAC_USE_L1 - range 10 100 - default "10" - help - Set the number of buffer packets used in driver. - -config BFIN_RX_DESC_NUM - int "Number of receive buffer packets" - depends on BFIN_MAC - range 20 100 if BFIN_MAC_USE_L1 - range 20 800 - default "20" - help - Set the number of buffer packets used in driver. - -config BFIN_MAC_USE_HWSTAMP - bool "Use IEEE 1588 hwstamp" - depends on BFIN_MAC && BF518 - default y - help - To support the IEEE 1588 Precision Time Protocol (PTP), select y here - config NET_NETX tristate "NetX Ethernet support" select MII diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 8e6dbd741206..d249d76ce2f9 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -57,7 +57,6 @@ obj-$(CONFIG_EQUALIZER) += eql.o obj-$(CONFIG_TUN) += tun.o obj-$(CONFIG_VETH) += veth.o obj-$(CONFIG_NET_NETX) += netx-eth.o -obj-$(CONFIG_BFIN_MAC) += bfin_mac.o obj-$(CONFIG_DM9000) += dm9000.o obj-$(CONFIG_ENC28J60) += enc28j60.o obj-$(CONFIG_ETHOC) += ethoc.o diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c deleted file mode 100644 index 6c019e148546..000000000000 --- a/drivers/net/bfin_mac.c +++ /dev/null @@ -1,1767 +0,0 @@ -/* - * Blackfin On-Chip MAC Driver - * - * Copyright 2004-2010 Analog Devices Inc. - * - * Enter bugs at http://blackfin.uclinux.org/ - * - * Licensed under the GPL-2 or later. - */ - -#define DRV_VERSION "1.1" -#define DRV_DESC "Blackfin on-chip Ethernet MAC driver" - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#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" - -MODULE_AUTHOR("Bryan Wu, Luke Yang"); -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, num) l1_data_sram_zalloc(size*num) -# define bfin_mac_free(dma_handle, ptr, num) l1_data_sram_free(ptr) -#else -# define bfin_mac_alloc(dma_handle, size, num) \ - dma_alloc_coherent(NULL, size*num, dma_handle, GFP_KERNEL) -# define bfin_mac_free(dma_handle, ptr, num) \ - dma_free_coherent(NULL, sizeof(*ptr)*num, 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; - -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, CONFIG_BFIN_TX_DESC_NUM); - } - - 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, CONFIG_BFIN_RX_DESC_NUM); - } -} - -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) { - pr_notice("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(); - pr_err("kmalloc failed\n"); - return -ENOMEM; -} - - -/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ - -/* - * MII operations - */ -/* Wait until the previous MDC/MDIO transaction has completed */ -static int 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) { - pr_err("wait MDC/MDIO transaction to complete timeout\n"); - return -ETIMEDOUT; - } - } - - return 0; -} - -/* 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) -{ - int ret; - - ret = bfin_mdio_poll(); - if (ret) - return ret; - - /* read mode */ - bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | - SET_REGAD((u16) regnum) | - STABUSY); - - ret = bfin_mdio_poll(); - if (ret) - return ret; - - 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) -{ - int ret; - - ret = bfin_mdio_poll(); - if (ret) - return ret; - - bfin_write_EMAC_STADAT((u32) value); - - /* write mode */ - bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | - SET_REGAD((u16) regnum) | - STAOP | - STABUSY); - - return bfin_mdio_poll(); -} - -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 (phydev->interface == PHY_INTERFACE_MODE_RMII) { - u32 opmode = bfin_read_EMAC_OPMODE(); - switch (phydev->speed) { - case 10: - opmode |= RMII_10; - break; - case 100: - opmode &= ~RMII_10; - break; - default: - netdev_warn(dev, - "Ack! Speed (%d) is not 10/100!\n", - phydev->speed); - break; - } - bfin_write_EMAC_OPMODE(opmode); - } - - 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, int phy_mode) -{ - 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 connected 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) { - netdev_err(dev, "no phy device found\n"); - return -ENODEV; - } - - if (phy_mode != PHY_INTERFACE_MODE_RMII && - phy_mode != PHY_INTERFACE_MODE_MII) { - netdev_err(dev, "invalid phy interface mode\n"); - return -EINVAL; - } - - phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link, - 0, phy_mode); - - if (IS_ERR(phydev)) { - netdev_err(dev, "could not attach PHY\n"); - 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; - - pr_info("attached PHY driver [%s] " - "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)@sclk=%dMHz)\n", - 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, KBUILD_MODNAME); - 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, -}; - -/**************************************************************************/ -static void setup_system_regs(struct net_device *dev) -{ - struct bfin_mac_local *lp = netdev_priv(dev); - int i; - unsigned short sysctl; - - /* - * Odd word alignment for Receive Frame DMA word - * Configure checksum support and rcve frame word alignment - */ - sysctl = bfin_read_EMAC_SYSCTL(); - /* - * check if interrupt is requested for any PHY, - * enable PHY interrupt only if needed - */ - for (i = 0; i < PHY_MAX_ADDR; ++i) - if (lp->mii_bus->irq[i] != PHY_POLL) - break; - if (i < PHY_MAX_ADDR) - sysctl |= PHYIE; - 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); - - /* Set vlan regs to let 1522 bytes long packets pass through */ - bfin_write_EMAC_VLAN1(lp->vlan1_mask); - bfin_write_EMAC_VLAN2(lp->vlan2_mask); - - /* 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); - - if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { - int timeout_cnt = MAX_TIMEOUT_CNT; - - /* When doing time stamping, keep the connection to the socket - * a while longer - */ - skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; - - /* - * 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) - netdev_err(netdev, "timestamp the TX packet failed\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 inline void _tx_reclaim_skb(void) -{ - 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; - } - tx_list_head = tx_list_head->next; - - } while (tx_list_head->status.status_word != 0); -} - -static void tx_reclaim_skb(struct bfin_mac_local *lp) -{ - int timeout_cnt = MAX_TIMEOUT_CNT; - - if (tx_list_head->status.status_word != 0) - _tx_reclaim_skb(); - - if (current_tx_ptr->next == tx_list_head) { - while (tx_list_head->status.status_word == 0) { - /* slow down polling to avoid too many queue stop. */ - udelay(10); - /* reclaim skb if DMA is not running. */ - if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)) - break; - if (timeout_cnt-- < 0) - break; - } - - if (timeout_cnt >= 0) - _tx_reclaim_skb(); - else - netif_stop_queue(lp->ndev); - } - - if (current_tx_ptr->next != tx_list_head && - netif_queue_stopped(lp->ndev)) - netif_wake_queue(lp->ndev); - - if (tx_list_head != current_tx_ptr) { - /* shorten the timer interval if tx queue is stopped */ - if (netif_queue_stopped(lp->ndev)) - lp->tx_reclaim_timer.expires = - jiffies + (TX_RECLAIM_JIFFIES >> 4); - else - lp->tx_reclaim_timer.expires = - jiffies + TX_RECLAIM_JIFFIES; - - mod_timer(&lp->tx_reclaim_timer, - lp->tx_reclaim_timer.expires); - } - - return; -} - -static void tx_reclaim_skb_timeout(unsigned long lp) -{ - tx_reclaim_skb((struct bfin_mac_local *)lp); -} - -static int bfin_mac_hard_start_xmit(struct sk_buff *skb, - struct net_device *dev) -{ - struct bfin_mac_local *lp = netdev_priv(dev); - u16 *data; - u32 data_align = (unsigned long)(skb->data) & 0x3; - - 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 (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) - *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 (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) - *((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; - 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(); - - /* always clear status buffer before start tx dma */ - current_tx_ptr->status.status_word = 0; - - /* 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: - bfin_tx_hwtstamp(dev, skb); - - current_tx_ptr = current_tx_ptr->next; - dev->stats.tx_packets++; - dev->stats.tx_bytes += (skb->len); - - tx_reclaim_skb(lp); - - 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) { - netdev_notice(dev, "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) { - netdev_notice(dev, "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) -{ - struct bfin_mac_local *lp = netdev_priv(dev); - - disable_irq(IRQ_MAC_RX); - bfin_mac_interrupt(IRQ_MAC_RX, dev); - tx_reclaim_skb(lp); - 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 int bfin_mac_enable(struct phy_device *phydev) -{ - int ret; - u32 opmode; - - pr_debug("%s\n", __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 */ - ret = bfin_mdio_poll(); - if (ret) - return ret; - - /* 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 (phydev->interface == PHY_INTERFACE_MODE_RMII) { - opmode |= RMII; /* For Now only 100MBit are supported */ -#if defined(CONFIG_BF537) || defined(CONFIG_BF536) - if (__SILICON_REVISION__ < 3) { - /* - * This isn't publicly documented (fun times!), but in - * silicon <=0.2, the RX and TX pins are clocked together. - * So in order to recv, we must enable the transmit side - * as well. This will cause a spurious TX interrupt too, - * but we can easily consume that. - */ - opmode |= TE; - } -#endif - } - - /* Turn on the EMAC rx */ - bfin_write_EMAC_OPMODE(opmode); - - return 0; -} - -/* Our watchdog timed out. Called by the networking layer */ -static void bfin_mac_timeout(struct net_device *dev) -{ - struct bfin_mac_local *lp = netdev_priv(dev); - - pr_debug("%s: %s\n", dev->name, __func__); - - bfin_mac_disable(); - - del_timer(&lp->tx_reclaim_timer); - - /* reset tx queue and free skb */ - while (tx_list_head != current_tx_ptr) { - 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; - } - tx_list_head = tx_list_head->next; - } - - if (netif_queue_stopped(lp->ndev)) - netif_wake_queue(lp->ndev); - - bfin_mac_enable(lp->phydev); - - /* 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; - u32 crc; - - emac_hashhi = emac_hashlo = 0; - - netdev_for_each_mc_addr(ha, dev) { - crc = ether_crc(ETH_ALEN, ha->addr); - 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) { - netdev_info(dev, "set promisc mode\n"); - sysctl = bfin_read_EMAC_OPMODE(); - sysctl |= PR; - 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) -{ - struct bfin_mac_local *lp = netdev_priv(netdev); - - if (!netif_running(netdev)) - return -EINVAL; - - switch (cmd) { - case SIOCSHWTSTAMP: - return bfin_mac_hwtstamp_ioctl(netdev, ifr, cmd); - default: - if (lp->phydev) - return phy_mii_ioctl(lp->phydev, ifr, cmd); - else - 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 ret; - 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)) { - netdev_warn(dev, "no valid ethernet hw addr\n"); - return -EINVAL; - } - - /* initial rx and tx list */ - ret = desc_list_init(); - if (ret) - return ret; - - 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(); - ret = bfin_mac_enable(lp->phydev); - if (ret) - return ret; - 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; - struct bfin_mii_bus_platform_data *mii_bus_data; - 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); - lp->ndev = 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); - if (!lp->mii_bus) { - dev_err(&pdev->dev, "Cannot get mii_bus!\n"); - rc = -ENODEV; - goto out_err_probe_mac; - } - lp->mii_bus->priv = ndev; - mii_bus_data = pd->dev.platform_data; - - rc = mii_probe(ndev, mii_bus_data->phy_mode); - if (rc) { - dev_err(&pdev->dev, "MII Probe failed!\n"); - goto out_err_mii_probe; - } - - lp->vlan1_mask = ETH_P_8021Q | mii_bus_data->vlan1_mask; - lp->vlan2_mask = ETH_P_8021Q | mii_bus_data->vlan2_mask; - - /* 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; - - init_timer(&lp->tx_reclaim_timer); - lp->tx_reclaim_timer.data = (unsigned long)lp; - lp->tx_reclaim_timer.function = tx_reclaim_skb_timeout; - - 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.. */ - netdev_info(ndev, "%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); -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); - - 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; - struct bfin_mii_bus_platform_data *mii_bus_pd; - const unsigned short *pin_req; - int rc, i; - - mii_bus_pd = dev_get_platdata(&pdev->dev); - if (!mii_bus_pd) { - dev_err(&pdev->dev, "No peripherals in platform data!\n"); - return -EINVAL; - } - - /* - * We are setting up a network card, - * so set the GPIO pins to Ethernet mode - */ - pin_req = mii_bus_pd->mac_peripherals; - rc = peripheral_request_list(pin_req, KBUILD_MODNAME); - 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"; - miibus->phy_mask = mii_bus_pd->phy_mask; - - snprintf(miibus->id, MII_BUS_ID_SIZE, "0"); - miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); - if (!miibus->irq) - goto out_err_irq_alloc; - - for (i = rc; i < PHY_MAX_ADDR; ++i) - miibus->irq[i] = PHY_POLL; - - rc = clamp(mii_bus_pd->phydev_number, 0, PHY_MAX_ADDR); - if (rc != mii_bus_pd->phydev_number) - dev_err(&pdev->dev, "Invalid number (%i) of phydevs\n", - mii_bus_pd->phydev_number); - for (i = 0; i < rc; ++i) { - unsigned short phyaddr = mii_bus_pd->phydev_data[i].addr; - if (phyaddr < PHY_MAX_ADDR) - miibus->irq[phyaddr] = mii_bus_pd->phydev_data[i].irq; - else - dev_err(&pdev->dev, - "Invalid PHY address %i for phydev %i\n", - phyaddr, i); - } - - 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: - kfree(miibus->irq); -out_err_irq_alloc: - 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); - struct bfin_mii_bus_platform_data *mii_bus_pd = - dev_get_platdata(&pdev->dev); - - platform_set_drvdata(pdev, NULL); - mdiobus_unregister(miibus); - kfree(miibus->irq); - mdiobus_free(miibus); - peripheral_free_list(mii_bus_pd->mac_peripherals); - - 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 = KBUILD_MODNAME, - .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); - diff --git a/drivers/net/bfin_mac.h b/drivers/net/bfin_mac.h deleted file mode 100644 index f8559ac9a403..000000000000 --- a/drivers/net/bfin_mac.h +++ /dev/null @@ -1,106 +0,0 @@ -/* - * 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. - */ -#ifndef _BFIN_MAC_H_ -#define _BFIN_MAC_H_ - -#include -#include -#include -#include -#include -#include - -/* - * Disable hardware checksum for bug #5600 if writeback cache is - * enabled. Otherwize, corrupted RX packet will be sent up stack - * without error mark. - */ -#ifndef CONFIG_BFIN_EXTMEM_WRITEBACK -#define BFIN_MAC_CSUM_OFFLOAD -#endif - -#define TX_RECLAIM_JIFFIES (HZ / 5) - -struct dma_descriptor { - struct dma_descriptor *next_dma_desc; - unsigned long start_addr; - unsigned short config; - unsigned short x_count; -}; - -struct status_area_rx { -#if defined(BFIN_MAC_CSUM_OFFLOAD) - unsigned short ip_hdr_csum; /* ip header checksum */ - /* ip payload(udp or tcp or others) checksum */ - unsigned short ip_payload_csum; -#endif - unsigned long status_word; /* the frame status word */ -}; - -struct status_area_tx { - unsigned long status_word; /* the frame status word */ -}; - -/* use two descriptors for a packet */ -struct net_dma_desc_rx { - struct net_dma_desc_rx *next; - struct sk_buff *skb; - struct dma_descriptor desc_a; - struct dma_descriptor desc_b; - struct status_area_rx status; -}; - -/* use two descriptors for a packet */ -struct net_dma_desc_tx { - struct net_dma_desc_tx *next; - struct sk_buff *skb; - struct dma_descriptor desc_a; - struct dma_descriptor desc_b; - unsigned char packet[1560]; - struct status_area_tx status; -}; - -struct bfin_mac_local { - /* - * these are things that the kernel wants me to keep, so users - * can find out semi-useless statistics of how well the card is - * performing - */ - struct net_device_stats stats; - - spinlock_t lock; - - int wol; /* Wake On Lan */ - int irq_wake_requested; - struct timer_list tx_reclaim_timer; - struct net_device *ndev; - - /* Data for EMAC_VLAN1 regs */ - u16 vlan1_mask, vlan2_mask; - - /* MII and PHY stuffs */ - int old_link; /* used by bf537_adjust_link */ - int old_speed; - int old_duplex; - - struct phy_device *phydev; - struct mii_bus *mii_bus; - -#if defined(CONFIG_BFIN_MAC_USE_HWSTAMP) - struct cyclecounter cycles; - struct timecounter clock; - struct timecompare compare; - struct hwtstamp_config stamp_cfg; -#endif -}; - -extern void bfin_get_ether_addr(char *addr); - -#endif diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 6b3b3dc172e7..e087337f92b5 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -15,6 +15,7 @@ source "drivers/net/ethernet/3com/Kconfig" source "drivers/net/ethernet/amd/Kconfig" source "drivers/net/ethernet/apple/Kconfig" source "drivers/net/ethernet/atheros/Kconfig" +source "drivers/net/ethernet/adi/Kconfig" source "drivers/net/ethernet/broadcom/Kconfig" source "drivers/net/ethernet/brocade/Kconfig" source "drivers/net/ethernet/chelsio/Kconfig" diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 2a1cbce02789..826db27564af 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_NET_VENDOR_8390) += 8390/ obj-$(CONFIG_NET_VENDOR_AMD) += amd/ obj-$(CONFIG_NET_VENDOR_APPLE) += apple/ obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/ +obj-$(CONFIG_NET_BFIN) += adi/ obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/ obj-$(CONFIG_NET_VENDOR_BROCADE) += brocade/ obj-$(CONFIG_NET_VENDOR_CHELSIO) += chelsio/ diff --git a/drivers/net/ethernet/adi/Kconfig b/drivers/net/ethernet/adi/Kconfig new file mode 100644 index 000000000000..6de9851045cb --- /dev/null +++ b/drivers/net/ethernet/adi/Kconfig @@ -0,0 +1,68 @@ +# +# Blackfin device configuration +# + +config NET_BFIN + bool "Blackfin devices" + depends on BF516 || BF518 || BF526 || BF527 || BF536 || BF537 + ---help--- + If you have a network (Ethernet) card belonging to this class, say Y. + Make sure you know the name of your card. Read the Ethernet-HOWTO, + available from . + + If unsure, say Y. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the remaining Blackfin card questions. If you say Y, you will be + asked for your specific card in the following questions. + +if NET_BFIN + +config BFIN_MAC + tristate "Blackfin on-chip MAC support" + depends on (BF516 || BF518 || BF526 || BF527 || BF536 || BF537) + select CRC32 + select MII + select PHYLIB + select BFIN_MAC_USE_L1 if DMA_UNCACHED_NONE + ---help--- + This is the driver for Blackfin on-chip mac device. Say Y if you want + it compiled into the kernel. This driver is also available as a + module ( = code which can be inserted in and removed from the running + kernel whenever you want). The module will be called bfin_mac. + +config BFIN_MAC_USE_L1 + bool "Use L1 memory for rx/tx packets" + depends on BFIN_MAC && (BF527 || BF537) + default y + ---help--- + To get maximum network performance, you should use L1 memory as rx/tx + buffers. Say N here if you want to reserve L1 memory for other uses. + +config BFIN_TX_DESC_NUM + int "Number of transmit buffer packets" + depends on BFIN_MAC + range 6 10 if BFIN_MAC_USE_L1 + range 10 100 + default "10" + ---help--- + Set the number of buffer packets used in driver. + +config BFIN_RX_DESC_NUM + int "Number of receive buffer packets" + depends on BFIN_MAC + range 20 100 if BFIN_MAC_USE_L1 + range 20 800 + default "20" + ---help--- + Set the number of buffer packets used in driver. + +config BFIN_MAC_USE_HWSTAMP + bool "Use IEEE 1588 hwstamp" + depends on BFIN_MAC && BF518 + default y + ---help--- + To support the IEEE 1588 Precision Time Protocol (PTP), select y here + +endif # NET_BFIN diff --git a/drivers/net/ethernet/adi/Makefile b/drivers/net/ethernet/adi/Makefile new file mode 100644 index 000000000000..b1fbe195d0e8 --- /dev/null +++ b/drivers/net/ethernet/adi/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Blackfin device drivers. +# + +obj-$(CONFIG_BFIN_MAC) += bfin_mac.o diff --git a/drivers/net/ethernet/adi/bfin_mac.c b/drivers/net/ethernet/adi/bfin_mac.c new file mode 100644 index 000000000000..6c019e148546 --- /dev/null +++ b/drivers/net/ethernet/adi/bfin_mac.c @@ -0,0 +1,1767 @@ +/* + * Blackfin On-Chip MAC Driver + * + * Copyright 2004-2010 Analog Devices Inc. + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Licensed under the GPL-2 or later. + */ + +#define DRV_VERSION "1.1" +#define DRV_DESC "Blackfin on-chip Ethernet MAC driver" + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#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" + +MODULE_AUTHOR("Bryan Wu, Luke Yang"); +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, num) l1_data_sram_zalloc(size*num) +# define bfin_mac_free(dma_handle, ptr, num) l1_data_sram_free(ptr) +#else +# define bfin_mac_alloc(dma_handle, size, num) \ + dma_alloc_coherent(NULL, size*num, dma_handle, GFP_KERNEL) +# define bfin_mac_free(dma_handle, ptr, num) \ + dma_free_coherent(NULL, sizeof(*ptr)*num, 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; + +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, CONFIG_BFIN_TX_DESC_NUM); + } + + 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, CONFIG_BFIN_RX_DESC_NUM); + } +} + +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) { + pr_notice("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(); + pr_err("kmalloc failed\n"); + return -ENOMEM; +} + + +/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ + +/* + * MII operations + */ +/* Wait until the previous MDC/MDIO transaction has completed */ +static int 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) { + pr_err("wait MDC/MDIO transaction to complete timeout\n"); + return -ETIMEDOUT; + } + } + + return 0; +} + +/* 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) +{ + int ret; + + ret = bfin_mdio_poll(); + if (ret) + return ret; + + /* read mode */ + bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | + SET_REGAD((u16) regnum) | + STABUSY); + + ret = bfin_mdio_poll(); + if (ret) + return ret; + + 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) +{ + int ret; + + ret = bfin_mdio_poll(); + if (ret) + return ret; + + bfin_write_EMAC_STADAT((u32) value); + + /* write mode */ + bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | + SET_REGAD((u16) regnum) | + STAOP | + STABUSY); + + return bfin_mdio_poll(); +} + +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 (phydev->interface == PHY_INTERFACE_MODE_RMII) { + u32 opmode = bfin_read_EMAC_OPMODE(); + switch (phydev->speed) { + case 10: + opmode |= RMII_10; + break; + case 100: + opmode &= ~RMII_10; + break; + default: + netdev_warn(dev, + "Ack! Speed (%d) is not 10/100!\n", + phydev->speed); + break; + } + bfin_write_EMAC_OPMODE(opmode); + } + + 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, int phy_mode) +{ + 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 connected 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) { + netdev_err(dev, "no phy device found\n"); + return -ENODEV; + } + + if (phy_mode != PHY_INTERFACE_MODE_RMII && + phy_mode != PHY_INTERFACE_MODE_MII) { + netdev_err(dev, "invalid phy interface mode\n"); + return -EINVAL; + } + + phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link, + 0, phy_mode); + + if (IS_ERR(phydev)) { + netdev_err(dev, "could not attach PHY\n"); + 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; + + pr_info("attached PHY driver [%s] " + "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)@sclk=%dMHz)\n", + 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, KBUILD_MODNAME); + 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, +}; + +/**************************************************************************/ +static void setup_system_regs(struct net_device *dev) +{ + struct bfin_mac_local *lp = netdev_priv(dev); + int i; + unsigned short sysctl; + + /* + * Odd word alignment for Receive Frame DMA word + * Configure checksum support and rcve frame word alignment + */ + sysctl = bfin_read_EMAC_SYSCTL(); + /* + * check if interrupt is requested for any PHY, + * enable PHY interrupt only if needed + */ + for (i = 0; i < PHY_MAX_ADDR; ++i) + if (lp->mii_bus->irq[i] != PHY_POLL) + break; + if (i < PHY_MAX_ADDR) + sysctl |= PHYIE; + 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); + + /* Set vlan regs to let 1522 bytes long packets pass through */ + bfin_write_EMAC_VLAN1(lp->vlan1_mask); + bfin_write_EMAC_VLAN2(lp->vlan2_mask); + + /* 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); + + if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { + int timeout_cnt = MAX_TIMEOUT_CNT; + + /* When doing time stamping, keep the connection to the socket + * a while longer + */ + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + + /* + * 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) + netdev_err(netdev, "timestamp the TX packet failed\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 inline void _tx_reclaim_skb(void) +{ + 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; + } + tx_list_head = tx_list_head->next; + + } while (tx_list_head->status.status_word != 0); +} + +static void tx_reclaim_skb(struct bfin_mac_local *lp) +{ + int timeout_cnt = MAX_TIMEOUT_CNT; + + if (tx_list_head->status.status_word != 0) + _tx_reclaim_skb(); + + if (current_tx_ptr->next == tx_list_head) { + while (tx_list_head->status.status_word == 0) { + /* slow down polling to avoid too many queue stop. */ + udelay(10); + /* reclaim skb if DMA is not running. */ + if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)) + break; + if (timeout_cnt-- < 0) + break; + } + + if (timeout_cnt >= 0) + _tx_reclaim_skb(); + else + netif_stop_queue(lp->ndev); + } + + if (current_tx_ptr->next != tx_list_head && + netif_queue_stopped(lp->ndev)) + netif_wake_queue(lp->ndev); + + if (tx_list_head != current_tx_ptr) { + /* shorten the timer interval if tx queue is stopped */ + if (netif_queue_stopped(lp->ndev)) + lp->tx_reclaim_timer.expires = + jiffies + (TX_RECLAIM_JIFFIES >> 4); + else + lp->tx_reclaim_timer.expires = + jiffies + TX_RECLAIM_JIFFIES; + + mod_timer(&lp->tx_reclaim_timer, + lp->tx_reclaim_timer.expires); + } + + return; +} + +static void tx_reclaim_skb_timeout(unsigned long lp) +{ + tx_reclaim_skb((struct bfin_mac_local *)lp); +} + +static int bfin_mac_hard_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct bfin_mac_local *lp = netdev_priv(dev); + u16 *data; + u32 data_align = (unsigned long)(skb->data) & 0x3; + + 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 (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) + *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 (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) + *((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; + 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(); + + /* always clear status buffer before start tx dma */ + current_tx_ptr->status.status_word = 0; + + /* 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: + bfin_tx_hwtstamp(dev, skb); + + current_tx_ptr = current_tx_ptr->next; + dev->stats.tx_packets++; + dev->stats.tx_bytes += (skb->len); + + tx_reclaim_skb(lp); + + 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) { + netdev_notice(dev, "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) { + netdev_notice(dev, "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) +{ + struct bfin_mac_local *lp = netdev_priv(dev); + + disable_irq(IRQ_MAC_RX); + bfin_mac_interrupt(IRQ_MAC_RX, dev); + tx_reclaim_skb(lp); + 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 int bfin_mac_enable(struct phy_device *phydev) +{ + int ret; + u32 opmode; + + pr_debug("%s\n", __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 */ + ret = bfin_mdio_poll(); + if (ret) + return ret; + + /* 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 (phydev->interface == PHY_INTERFACE_MODE_RMII) { + opmode |= RMII; /* For Now only 100MBit are supported */ +#if defined(CONFIG_BF537) || defined(CONFIG_BF536) + if (__SILICON_REVISION__ < 3) { + /* + * This isn't publicly documented (fun times!), but in + * silicon <=0.2, the RX and TX pins are clocked together. + * So in order to recv, we must enable the transmit side + * as well. This will cause a spurious TX interrupt too, + * but we can easily consume that. + */ + opmode |= TE; + } +#endif + } + + /* Turn on the EMAC rx */ + bfin_write_EMAC_OPMODE(opmode); + + return 0; +} + +/* Our watchdog timed out. Called by the networking layer */ +static void bfin_mac_timeout(struct net_device *dev) +{ + struct bfin_mac_local *lp = netdev_priv(dev); + + pr_debug("%s: %s\n", dev->name, __func__); + + bfin_mac_disable(); + + del_timer(&lp->tx_reclaim_timer); + + /* reset tx queue and free skb */ + while (tx_list_head != current_tx_ptr) { + 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; + } + tx_list_head = tx_list_head->next; + } + + if (netif_queue_stopped(lp->ndev)) + netif_wake_queue(lp->ndev); + + bfin_mac_enable(lp->phydev); + + /* 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; + u32 crc; + + emac_hashhi = emac_hashlo = 0; + + netdev_for_each_mc_addr(ha, dev) { + crc = ether_crc(ETH_ALEN, ha->addr); + 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) { + netdev_info(dev, "set promisc mode\n"); + sysctl = bfin_read_EMAC_OPMODE(); + sysctl |= PR; + 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) +{ + struct bfin_mac_local *lp = netdev_priv(netdev); + + if (!netif_running(netdev)) + return -EINVAL; + + switch (cmd) { + case SIOCSHWTSTAMP: + return bfin_mac_hwtstamp_ioctl(netdev, ifr, cmd); + default: + if (lp->phydev) + return phy_mii_ioctl(lp->phydev, ifr, cmd); + else + 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 ret; + 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)) { + netdev_warn(dev, "no valid ethernet hw addr\n"); + return -EINVAL; + } + + /* initial rx and tx list */ + ret = desc_list_init(); + if (ret) + return ret; + + 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(); + ret = bfin_mac_enable(lp->phydev); + if (ret) + return ret; + 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; + struct bfin_mii_bus_platform_data *mii_bus_data; + 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); + lp->ndev = 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); + if (!lp->mii_bus) { + dev_err(&pdev->dev, "Cannot get mii_bus!\n"); + rc = -ENODEV; + goto out_err_probe_mac; + } + lp->mii_bus->priv = ndev; + mii_bus_data = pd->dev.platform_data; + + rc = mii_probe(ndev, mii_bus_data->phy_mode); + if (rc) { + dev_err(&pdev->dev, "MII Probe failed!\n"); + goto out_err_mii_probe; + } + + lp->vlan1_mask = ETH_P_8021Q | mii_bus_data->vlan1_mask; + lp->vlan2_mask = ETH_P_8021Q | mii_bus_data->vlan2_mask; + + /* 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; + + init_timer(&lp->tx_reclaim_timer); + lp->tx_reclaim_timer.data = (unsigned long)lp; + lp->tx_reclaim_timer.function = tx_reclaim_skb_timeout; + + 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.. */ + netdev_info(ndev, "%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); +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); + + 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; + struct bfin_mii_bus_platform_data *mii_bus_pd; + const unsigned short *pin_req; + int rc, i; + + mii_bus_pd = dev_get_platdata(&pdev->dev); + if (!mii_bus_pd) { + dev_err(&pdev->dev, "No peripherals in platform data!\n"); + return -EINVAL; + } + + /* + * We are setting up a network card, + * so set the GPIO pins to Ethernet mode + */ + pin_req = mii_bus_pd->mac_peripherals; + rc = peripheral_request_list(pin_req, KBUILD_MODNAME); + 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"; + miibus->phy_mask = mii_bus_pd->phy_mask; + + snprintf(miibus->id, MII_BUS_ID_SIZE, "0"); + miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); + if (!miibus->irq) + goto out_err_irq_alloc; + + for (i = rc; i < PHY_MAX_ADDR; ++i) + miibus->irq[i] = PHY_POLL; + + rc = clamp(mii_bus_pd->phydev_number, 0, PHY_MAX_ADDR); + if (rc != mii_bus_pd->phydev_number) + dev_err(&pdev->dev, "Invalid number (%i) of phydevs\n", + mii_bus_pd->phydev_number); + for (i = 0; i < rc; ++i) { + unsigned short phyaddr = mii_bus_pd->phydev_data[i].addr; + if (phyaddr < PHY_MAX_ADDR) + miibus->irq[phyaddr] = mii_bus_pd->phydev_data[i].irq; + else + dev_err(&pdev->dev, + "Invalid PHY address %i for phydev %i\n", + phyaddr, i); + } + + 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: + kfree(miibus->irq); +out_err_irq_alloc: + 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); + struct bfin_mii_bus_platform_data *mii_bus_pd = + dev_get_platdata(&pdev->dev); + + platform_set_drvdata(pdev, NULL); + mdiobus_unregister(miibus); + kfree(miibus->irq); + mdiobus_free(miibus); + peripheral_free_list(mii_bus_pd->mac_peripherals); + + 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 = KBUILD_MODNAME, + .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); + diff --git a/drivers/net/ethernet/adi/bfin_mac.h b/drivers/net/ethernet/adi/bfin_mac.h new file mode 100644 index 000000000000..f8559ac9a403 --- /dev/null +++ b/drivers/net/ethernet/adi/bfin_mac.h @@ -0,0 +1,106 @@ +/* + * 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. + */ +#ifndef _BFIN_MAC_H_ +#define _BFIN_MAC_H_ + +#include +#include +#include +#include +#include +#include + +/* + * Disable hardware checksum for bug #5600 if writeback cache is + * enabled. Otherwize, corrupted RX packet will be sent up stack + * without error mark. + */ +#ifndef CONFIG_BFIN_EXTMEM_WRITEBACK +#define BFIN_MAC_CSUM_OFFLOAD +#endif + +#define TX_RECLAIM_JIFFIES (HZ / 5) + +struct dma_descriptor { + struct dma_descriptor *next_dma_desc; + unsigned long start_addr; + unsigned short config; + unsigned short x_count; +}; + +struct status_area_rx { +#if defined(BFIN_MAC_CSUM_OFFLOAD) + unsigned short ip_hdr_csum; /* ip header checksum */ + /* ip payload(udp or tcp or others) checksum */ + unsigned short ip_payload_csum; +#endif + unsigned long status_word; /* the frame status word */ +}; + +struct status_area_tx { + unsigned long status_word; /* the frame status word */ +}; + +/* use two descriptors for a packet */ +struct net_dma_desc_rx { + struct net_dma_desc_rx *next; + struct sk_buff *skb; + struct dma_descriptor desc_a; + struct dma_descriptor desc_b; + struct status_area_rx status; +}; + +/* use two descriptors for a packet */ +struct net_dma_desc_tx { + struct net_dma_desc_tx *next; + struct sk_buff *skb; + struct dma_descriptor desc_a; + struct dma_descriptor desc_b; + unsigned char packet[1560]; + struct status_area_tx status; +}; + +struct bfin_mac_local { + /* + * these are things that the kernel wants me to keep, so users + * can find out semi-useless statistics of how well the card is + * performing + */ + struct net_device_stats stats; + + spinlock_t lock; + + int wol; /* Wake On Lan */ + int irq_wake_requested; + struct timer_list tx_reclaim_timer; + struct net_device *ndev; + + /* Data for EMAC_VLAN1 regs */ + u16 vlan1_mask, vlan2_mask; + + /* MII and PHY stuffs */ + int old_link; /* used by bf537_adjust_link */ + int old_speed; + int old_duplex; + + struct phy_device *phydev; + struct mii_bus *mii_bus; + +#if defined(CONFIG_BFIN_MAC_USE_HWSTAMP) + struct cyclecounter cycles; + struct timecounter clock; + struct timecompare compare; + struct hwtstamp_config stamp_cfg; +#endif +}; + +extern void bfin_get_ether_addr(char *addr); + +#endif