diff options
Diffstat (limited to 'drivers/net/ethernet/adi/bfin_mac.c')
| -rw-r--r-- | drivers/net/ethernet/adi/bfin_mac.c | 1881 |
1 files changed, 0 insertions, 1881 deletions
diff --git a/drivers/net/ethernet/adi/bfin_mac.c b/drivers/net/ethernet/adi/bfin_mac.c deleted file mode 100644 index 7120f2b9c6ef..000000000000 --- a/drivers/net/ethernet/adi/bfin_mac.c +++ /dev/null @@ -1,1881 +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 <linux/init.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/timer.h> -#include <linux/errno.h> -#include <linux/irq.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/crc32.h> -#include <linux/device.h> -#include <linux/spinlock.h> -#include <linux/mii.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/skbuff.h> -#include <linux/platform_device.h> - -#include <asm/dma.h> -#include <linux/dma-mapping.h> - -#include <asm/div64.h> -#include <asm/dpmc.h> -#include <asm/blackfin.h> -#include <asm/cacheflush.h> -#include <asm/portmux.h> -#include <mach/pll.h> - -#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(struct net_device *dev) -{ - 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 = netdev_alloc_skb(dev, PKT_BUF_SZ + NET_IP_ALIGN); - if (!new_skb) - goto init_error; - - skb_reserve(new_skb, NET_IP_ALIGN); - /* Invalidate the data cache of skb->data range when it is write back - * cache. It will prevent overwriting 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 void bfin_mac_adjust_link(struct net_device *dev) -{ - struct bfin_mac_local *lp = netdev_priv(dev); - struct phy_device *phydev = dev->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; - unsigned short sysctl; - 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); - - phydev = phy_find_first(lp->mii_bus); - 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, phydev_name(phydev), - &bfin_mac_adjust_link, 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; - - phy_attached_print(phydev, "mdc_clk=%dHz(mdc_div=%d)@sclk=%dMHz)\n", - 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 void bfin_mac_ethtool_getdrvinfo(struct net_device *dev, - struct ethtool_drvinfo *info) -{ - strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); - strlcpy(info->version, DRV_VERSION, sizeof(info->version)); - strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); - strlcpy(info->bus_info, dev_name(&dev->dev), sizeof(info->bus_info)); -} - -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, - 0, "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; -} - -#ifdef CONFIG_BFIN_MAC_USE_HWSTAMP -static int bfin_mac_ethtool_get_ts_info(struct net_device *dev, - struct ethtool_ts_info *info) -{ - struct bfin_mac_local *lp = netdev_priv(dev); - - info->so_timestamping = - SOF_TIMESTAMPING_TX_HARDWARE | - SOF_TIMESTAMPING_RX_HARDWARE | - SOF_TIMESTAMPING_RAW_HARDWARE; - info->phc_index = lp->phc_index; - info->tx_types = - (1 << HWTSTAMP_TX_OFF) | - (1 << HWTSTAMP_TX_ON); - info->rx_filters = - (1 << HWTSTAMP_FILTER_NONE) | - (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) | - (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | - (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT); - return 0; -} -#endif - -static const struct ethtool_ops bfin_mac_ethtool_ops = { - .get_link = ethtool_op_get_link, - .get_drvinfo = bfin_mac_ethtool_getdrvinfo, - .get_wol = bfin_mac_ethtool_getwol, - .set_wol = bfin_mac_ethtool_setwol, -#ifdef CONFIG_BFIN_MAC_USE_HWSTAMP - .get_ts_info = bfin_mac_ethtool_get_ts_info, -#endif - .get_link_ksettings = phy_ethtool_get_link_ksettings, - .set_link_ksettings = phy_ethtool_set_link_ksettings, -}; - -/**************************************************************************/ -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 u32 bfin_select_phc_clock(u32 input_clk, unsigned int *shift_result) -{ - u32 ipn = 1000000000UL / input_clk; - u32 ppn = 1; - unsigned int shift = 0; - - while (ppn <= ipn) { - ppn <<= 1; - shift++; - } - *shift_result = shift; - return 1000000000UL / ppn; -} - -static int bfin_mac_hwtstamp_set(struct net_device *netdev, - struct ifreq *ifr) -{ - 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(); - - SSYNC(); - } - - lp->stamp_cfg = config; - return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? - -EFAULT : 0; -} - -static int bfin_mac_hwtstamp_get(struct net_device *netdev, - struct ifreq *ifr) -{ - struct bfin_mac_local *lp = netdev_priv(netdev); - - return copy_to_user(ifr->ifr_data, &lp->stamp_cfg, - sizeof(lp->stamp_cfg)) ? - -EFAULT : 0; -} - -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 = regval << lp->shift; - shhwtstamps.hwtstamp = ns_to_ktime(ns); - skb_tstamp_tx(skb, &shhwtstamps); - } - } -} - -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 = regval << lp->shift; - memset(shhwtstamps, 0, sizeof(*shhwtstamps)); - shhwtstamps->hwtstamp = ns_to_ktime(ns); -} - -static void bfin_mac_hwtstamp_init(struct net_device *netdev) -{ - struct bfin_mac_local *lp = netdev_priv(netdev); - u64 addend, ppb; - u32 input_clk, phc_clk; - - /* Initialize hardware timer */ - input_clk = get_sclk(); - phc_clk = bfin_select_phc_clock(input_clk, &lp->shift); - addend = phc_clk * (1ULL << 32); - do_div(addend, input_clk); - bfin_write_EMAC_PTP_ADDEND((u32)addend); - - lp->addend = addend; - ppb = 1000000000ULL * input_clk; - do_div(ppb, phc_clk); - lp->max_ppb = ppb - 1000000000ULL - 1ULL; - - /* Initialize hwstamp config */ - lp->stamp_cfg.rx_filter = HWTSTAMP_FILTER_NONE; - lp->stamp_cfg.tx_type = HWTSTAMP_TX_OFF; -} - -static u64 bfin_ptp_time_read(struct bfin_mac_local *lp) -{ - u64 ns; - u32 lo, hi; - - lo = bfin_read_EMAC_PTP_TIMELO(); - hi = bfin_read_EMAC_PTP_TIMEHI(); - - ns = ((u64) hi) << 32; - ns |= lo; - ns <<= lp->shift; - - return ns; -} - -static void bfin_ptp_time_write(struct bfin_mac_local *lp, u64 ns) -{ - u32 hi, lo; - - ns >>= lp->shift; - hi = ns >> 32; - lo = ns & 0xffffffff; - - bfin_write_EMAC_PTP_TIMELO(lo); - bfin_write_EMAC_PTP_TIMEHI(hi); -} - -/* PTP Hardware Clock operations */ - -static int bfin_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) -{ - u64 adj; - u32 diff, addend; - int neg_adj = 0; - struct bfin_mac_local *lp = - container_of(ptp, struct bfin_mac_local, caps); - - if (ppb < 0) { - neg_adj = 1; - ppb = -ppb; - } - addend = lp->addend; - adj = addend; - adj *= ppb; - diff = div_u64(adj, 1000000000ULL); - - addend = neg_adj ? addend - diff : addend + diff; - - bfin_write_EMAC_PTP_ADDEND(addend); - - return 0; -} - -static int bfin_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) -{ - s64 now; - unsigned long flags; - struct bfin_mac_local *lp = - container_of(ptp, struct bfin_mac_local, caps); - - spin_lock_irqsave(&lp->phc_lock, flags); - - now = bfin_ptp_time_read(lp); - now += delta; - bfin_ptp_time_write(lp, now); - - spin_unlock_irqrestore(&lp->phc_lock, flags); - - return 0; -} - -static int bfin_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) -{ - u64 ns; - unsigned long flags; - struct bfin_mac_local *lp = - container_of(ptp, struct bfin_mac_local, caps); - - spin_lock_irqsave(&lp->phc_lock, flags); - - ns = bfin_ptp_time_read(lp); - - spin_unlock_irqrestore(&lp->phc_lock, flags); - - *ts = ns_to_timespec64(ns); - - return 0; -} - -static int bfin_ptp_settime(struct ptp_clock_info *ptp, - const struct timespec64 *ts) -{ - u64 ns; - unsigned long flags; - struct bfin_mac_local *lp = - container_of(ptp, struct bfin_mac_local, caps); - - ns = timespec64_to_ns(ts); - - spin_lock_irqsave(&lp->phc_lock, flags); - - bfin_ptp_time_write(lp, ns); - - spin_unlock_irqrestore(&lp->phc_lock, flags); - - return 0; -} - -static int bfin_ptp_enable(struct ptp_clock_info *ptp, - struct ptp_clock_request *rq, int on) -{ - return -EOPNOTSUPP; -} - -static const struct ptp_clock_info bfin_ptp_caps = { - .owner = THIS_MODULE, - .name = "BF518 clock", - .max_adj = 0, - .n_alarm = 0, - .n_ext_ts = 0, - .n_per_out = 0, - .n_pins = 0, - .pps = 0, - .adjfreq = bfin_ptp_adjfreq, - .adjtime = bfin_ptp_adjtime, - .gettime64 = bfin_ptp_gettime, - .settime64 = bfin_ptp_settime, - .enable = bfin_ptp_enable, -}; - -static int bfin_phc_init(struct net_device *netdev, struct device *dev) -{ - struct bfin_mac_local *lp = netdev_priv(netdev); - - lp->caps = bfin_ptp_caps; - lp->caps.max_adj = lp->max_ppb; - lp->clock = ptp_clock_register(&lp->caps, dev); - if (IS_ERR(lp->clock)) - return PTR_ERR(lp->clock); - - lp->phc_index = ptp_clock_index(lp->clock); - spin_lock_init(&lp->phc_lock); - - return 0; -} - -static void bfin_phc_release(struct bfin_mac_local *lp) -{ - ptp_clock_unregister(lp->clock); -} - -#else -# define bfin_mac_hwtstamp_is_none(cfg) 0 -# define bfin_mac_hwtstamp_init(dev) -# define bfin_mac_hwtstamp_set(dev, ifr) (-EOPNOTSUPP) -# define bfin_mac_hwtstamp_get(dev, ifr) (-EOPNOTSUPP) -# define bfin_rx_hwtstamp(dev, skb) -# define bfin_tx_hwtstamp(dev, skb) -# define bfin_phc_init(netdev, dev) 0 -# define bfin_phc_release(lp) -#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_consume_skb_any(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(struct timer_list *t) -{ - struct bfin_mac_local *lp = from_timer(lp, t, tx_reclaim_timer); - - tx_reclaim_skb(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 bfin_mac_local *lp) -{ - struct net_device *dev = lp->ndev; - struct sk_buff *skb, *new_skb; - unsigned short len; -#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 = netdev_alloc_skb(dev, PKT_BUF_SZ + NET_IP_ALIGN); - if (!new_skb) { - dev->stats.rx_dropped++; - goto out; - } - /* reserve 2 bytes for RXDWA padding */ - skb_reserve(new_skb, NET_IP_ALIGN); - /* Invalidate the data cache of skb->data range when it is write back - * cache. It will prevent overwriting 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 - - napi_gro_receive(&lp->napi, 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; -} - -static int bfin_mac_poll(struct napi_struct *napi, int budget) -{ - int i = 0; - struct bfin_mac_local *lp = container_of(napi, - struct bfin_mac_local, - napi); - - while (current_rx_ptr->status.status_word != 0 && i < budget) { - bfin_mac_rx(lp); - i++; - } - - if (i < budget) { - napi_complete_done(napi, i); - if (test_and_clear_bit(BFIN_MAC_RX_IRQ_DISABLED, &lp->flags)) - enable_irq(IRQ_MAC_RX); - } - - return i; -} - -/* interrupt routine to handle rx and error signal */ -static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id) -{ - struct bfin_mac_local *lp = netdev_priv(dev_id); - u32 status; - - status = bfin_read_DMA1_IRQ_STATUS(); - - bfin_write_DMA1_IRQ_STATUS(status | DMA_DONE | DMA_ERR); - if (status & DMA_DONE) { - disable_irq_nosync(IRQ_MAC_RX); - set_bit(BFIN_MAC_RX_IRQ_DISABLED, &lp->flags); - napi_schedule(&lp->napi); - } - - return IRQ_HANDLED; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -static void bfin_mac_poll_controller(struct net_device *dev) -{ - struct bfin_mac_local *lp = netdev_priv(dev); - - bfin_mac_interrupt(IRQ_MAC_RX, dev); - tx_reclaim_skb(lp); -} -#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(dev)) - netif_wake_queue(dev); - - bfin_mac_enable(dev->phydev); - - /* We can accept TX packets again */ - netif_trans_update(dev); /* prevent tx timeout */ -} - -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) -{ - if (!netif_running(netdev)) - return -EINVAL; - - switch (cmd) { - case SIOCSHWTSTAMP: - return bfin_mac_hwtstamp_set(netdev, ifr); - case SIOCGHWTSTAMP: - return bfin_mac_hwtstamp_get(netdev, ifr); - default: - if (netdev->phydev) - return phy_mii_ioctl(netdev->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(dev); - if (ret) - return ret; - - phy_start(dev->phydev); - setup_system_regs(dev); - setup_mac_addr(dev->dev_addr); - - bfin_mac_disable(); - ret = bfin_mac_enable(dev->phydev); - if (ret) - return ret; - pr_debug("hardware init finished\n"); - - napi_enable(&lp->napi); - 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); - napi_disable(&lp->napi); - netif_carrier_off(dev); - - phy_stop(dev->phydev); - phy_write(dev->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_rx_mode = bfin_mac_set_multicast_list, - .ndo_do_ioctl = bfin_mac_ioctl, - .ndo_validate_addr = eth_validate_addr, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = bfin_mac_poll_controller, -#endif -}; - -static int 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) - 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 probe? 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)) { - if (bfin_get_ether_addr(ndev->dev_addr) || - !is_valid_ether_addr(ndev->dev_addr)) { - /* Still not valid, get a random one */ - netdev_warn(ndev, "Setting Ethernet MAC to a random one\n"); - eth_hw_addr_random(ndev); - } - } - - setup_mac_addr(ndev->dev_addr); - - if (!dev_get_platdata(&pdev->dev)) { - dev_err(&pdev->dev, "Cannot get platform device bfin_mii_bus!\n"); - rc = -ENODEV; - goto out_err_probe_mac; - } - pd = dev_get_platdata(&pdev->dev); - 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 = dev_get_platdata(&pd->dev); - - 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; - - ndev->netdev_ops = &bfin_mac_netdev_ops; - ndev->ethtool_ops = &bfin_mac_ethtool_ops; - - timer_setup(&lp->tx_reclaim_timer, tx_reclaim_skb_timeout, 0); - - lp->flags = 0; - netif_napi_add(ndev, &lp->napi, bfin_mac_poll, CONFIG_BFIN_RX_DESC_NUM); - - spin_lock_init(&lp->lock); - - /* now, enable interrupts */ - /* register irq handler */ - rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt, - 0, "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); - rc = bfin_phc_init(ndev, &pdev->dev); - if (rc) { - dev_err(&pdev->dev, "Cannot register PHC device!\n"); - goto out_err_phc; - } - - /* 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_phc: -out_err_reg_ndev: - free_irq(IRQ_MAC_RX, ndev); -out_err_request_irq: - netif_napi_del(&lp->napi); -out_err_mii_probe: - mdiobus_unregister(lp->mii_bus); - mdiobus_free(lp->mii_bus); -out_err_probe_mac: - free_netdev(ndev); - - return rc; -} - -static int bfin_mac_remove(struct platform_device *pdev) -{ - struct net_device *ndev = platform_get_drvdata(pdev); - struct bfin_mac_local *lp = netdev_priv(ndev); - - bfin_phc_release(lp); - - lp->mii_bus->priv = NULL; - - unregister_netdev(ndev); - - netif_napi_del(&lp->napi); - - 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 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->parent = &pdev->dev; - miibus->name = "bfin_mii_bus"; - miibus->phy_mask = mii_bus_pd->phy_mask; - - snprintf(miibus->id, MII_BUS_ID_SIZE, "%s-%x", - pdev->name, pdev->id); - - 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_irq_alloc; - } - - platform_set_drvdata(pdev, miibus); - return 0; - -out_err_irq_alloc: - mdiobus_free(miibus); -out_err_alloc: - peripheral_free_list(pin_req); - - return rc; -} - -static int 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); - - mdiobus_unregister(miibus); - 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 = bfin_mii_bus_remove, - .driver = { - .name = "bfin_mii_bus", - }, -}; - -static struct platform_driver bfin_mac_driver = { - .probe = bfin_mac_probe, - .remove = bfin_mac_remove, - .resume = bfin_mac_resume, - .suspend = bfin_mac_suspend, - .driver = { - .name = KBUILD_MODNAME, - }, -}; - -static struct platform_driver * const drivers[] = { - &bfin_mii_bus_driver, - &bfin_mac_driver, -}; - -static int __init bfin_mac_init(void) -{ - return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); -} - -module_init(bfin_mac_init); - -static void __exit bfin_mac_cleanup(void) -{ - platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); -} - -module_exit(bfin_mac_cleanup); - |