drivers/net/ethernet/broadcom/bcmsysport.c

   1 /*
   2  * Broadcom BCM7xxx System Port Ethernet MAC driver
   3  *
   4  * Copyright (C) 2014 Broadcom Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
  12
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/of.h>
  21 #include <linux/of_net.h>
  22 #include <linux/of_mdio.h>
  23 #include <linux/phy.h>
  24 #include <linux/phy_fixed.h>
  25 #include <net/ip.h>
  26 #include <net/ipv6.h>
  27
  28 #include "bcmsysport.h"
  29
  30 /* I/O accessors register helpers */
  31 #define BCM_SYSPORT_IO_MACRO(name, offset) \
  32 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)  \
  33 {                                                                       \
  34         u32 reg = __raw_readl(priv->base + offset + off);               \
  35         return reg;                                                     \
  36 }                                                                       \
  37 static inline void name##_writel(struct bcm_sysport_priv *priv,         \
  38                                   u32 val, u32 off)                     \
  39 {                                                                       \
  40         __raw_writel(val, priv->base + offset + off);                   \
  41 }                                                                       \
  42
  43 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
  44 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
  45 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
  46 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
  47 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
  48 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
  49 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
  50 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
  51 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
  52 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
  53
  54 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
  55  * same layout, except it has been moved by 4 bytes up, *sigh*
  56  */
  57 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
  58 {
  59         if (priv->is_lite && off >= RDMA_STATUS)
  60                 off += 4;
  61         return __raw_readl(priv->base + SYS_PORT_RDMA_OFFSET + off);
  62 }
  63
  64 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
  65 {
  66         if (priv->is_lite && off >= RDMA_STATUS)
  67                 off += 4;
  68         __raw_writel(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
  69 }
  70
  71 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
  72 {
  73         if (!priv->is_lite) {
  74                 return BIT(bit);
  75         } else {
  76                 if (bit >= ACB_ALGO)
  77                         return BIT(bit + 1);
  78                 else
  79                         return BIT(bit);
  80         }
  81 }
  82
  83 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
  84  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
  85   */
  86 #define BCM_SYSPORT_INTR_L2(which)      \
  87 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
  88                                                 u32 mask)               \
  89 {                                                                       \
  90         priv->irq##which##_mask &= ~(mask);                             \
  91         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
  92 }                                                                       \
  93 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
  94                                                 u32 mask)               \
  95 {                                                                       \
  96         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
  97         priv->irq##which##_mask |= (mask);                              \
  98 }                                                                       \
  99
 100 BCM_SYSPORT_INTR_L2(0)
 101 BCM_SYSPORT_INTR_L2(1)
 102
 103 /* Register accesses to GISB/RBUS registers are expensive (few hundred
 104  * nanoseconds), so keep the check for 64-bits explicit here to save
 105  * one register write per-packet on 32-bits platforms.
 106  */
 107 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
 108                                      void __iomem *d,
 109                                      dma_addr_t addr)
 110 {
 111 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 112         __raw_writel(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
 113                      d + DESC_ADDR_HI_STATUS_LEN);
 114 #endif
 115         __raw_writel(lower_32_bits(addr), d + DESC_ADDR_LO);
 116 }
 117
 118 static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv,
 119                                              struct dma_desc *desc,
 120                                              unsigned int port)
 121 {
 122         /* Ports are latched, so write upper address first */
 123         tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port));
 124         tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port));
 125 }
 126
 127 /* Ethtool operations */
 128 static int bcm_sysport_set_rx_csum(struct net_device *dev,
 129                                    netdev_features_t wanted)
 130 {
 131         struct bcm_sysport_priv *priv = netdev_priv(dev);
 132         u32 reg;
 133
 134         priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
 135         reg = rxchk_readl(priv, RXCHK_CONTROL);
 136         if (priv->rx_chk_en)
 137                 reg |= RXCHK_EN;
 138         else
 139                 reg &= ~RXCHK_EN;
 140
 141         /* If UniMAC forwards CRC, we need to skip over it to get
 142          * a valid CHK bit to be set in the per-packet status word
 143          */
 144         if (priv->rx_chk_en && priv->crc_fwd)
 145                 reg |= RXCHK_SKIP_FCS;
 146         else
 147                 reg &= ~RXCHK_SKIP_FCS;
 148
 149         /* If Broadcom tags are enabled (e.g: using a switch), make
 150          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 151          * tag after the Ethernet MAC Source Address.
 152          */
 153         if (netdev_uses_dsa(dev))
 154                 reg |= RXCHK_BRCM_TAG_EN;
 155         else
 156                 reg &= ~RXCHK_BRCM_TAG_EN;
 157
 158         rxchk_writel(priv, reg, RXCHK_CONTROL);
 159
 160         return 0;
 161 }
 162
 163 static int bcm_sysport_set_tx_csum(struct net_device *dev,
 164                                    netdev_features_t wanted)
 165 {
 166         struct bcm_sysport_priv *priv = netdev_priv(dev);
 167         u32 reg;
 168
 169         /* Hardware transmit checksum requires us to enable the Transmit status
 170          * block prepended to the packet contents
 171          */
 172         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
 173         reg = tdma_readl(priv, TDMA_CONTROL);
 174         if (priv->tsb_en)
 175                 reg |= tdma_control_bit(priv, TSB_EN);
 176         else
 177                 reg &= ~tdma_control_bit(priv, TSB_EN);
 178         tdma_writel(priv, reg, TDMA_CONTROL);
 179
 180         return 0;
 181 }
 182
 183 static int bcm_sysport_set_features(struct net_device *dev,
 184                                     netdev_features_t features)
 185 {
 186         netdev_features_t changed = features ^ dev->features;
 187         netdev_features_t wanted = dev->wanted_features;
 188         int ret = 0;
 189
 190         if (changed & NETIF_F_RXCSUM)
 191                 ret = bcm_sysport_set_rx_csum(dev, wanted);
 192         if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
 193                 ret = bcm_sysport_set_tx_csum(dev, wanted);
 194
 195         return ret;
 196 }
 197
 198 /* Hardware counters must be kept in sync because the order/offset
 199  * is important here (order in structure declaration = order in hardware)
 200  */
 201 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 202         /* general stats */
 203         STAT_NETDEV(rx_packets),
 204         STAT_NETDEV(tx_packets),
 205         STAT_NETDEV(rx_bytes),
 206         STAT_NETDEV(tx_bytes),
 207         STAT_NETDEV(rx_errors),
 208         STAT_NETDEV(tx_errors),
 209         STAT_NETDEV(rx_dropped),
 210         STAT_NETDEV(tx_dropped),
 211         STAT_NETDEV(multicast),
 212         /* UniMAC RSV counters */
 213         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 214         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 215         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 216         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 217         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 218         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 219         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 220         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 221         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 222         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 223         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 224         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 225         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 226         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 227         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 228         STAT_MIB_RX("rx_control", mib.rx.cf),
 229         STAT_MIB_RX("rx_pause", mib.rx.pf),
 230         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 231         STAT_MIB_RX("rx_align", mib.rx.aln),
 232         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 233         STAT_MIB_RX("rx_code", mib.rx.cde),
 234         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 235         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 236         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 237         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 238         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 239         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 240         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 241         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 242         /* UniMAC TSV counters */
 243         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 244         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 245         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 246         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 247         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 248         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 249         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 250         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 251         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 252         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 253         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 254         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 255         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 256         STAT_MIB_TX("tx_pause", mib.tx.pf),
 257         STAT_MIB_TX("tx_control", mib.tx.cf),
 258         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 259         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 260         STAT_MIB_TX("tx_defer", mib.tx.drf),
 261         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 262         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 263         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 264         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 265         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 266         STAT_MIB_TX("tx_frags", mib.tx.frg),
 267         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 268         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 269         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 270         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 271         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 272         /* UniMAC RUNT counters */
 273         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 274         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 275         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 276         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 277         /* RXCHK misc statistics */
 278         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 279         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 280                    RXCHK_OTHER_DISC_CNTR),
 281         /* RBUF misc statistics */
 282         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 283         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 284         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 285         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 286         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 287 };
 288
 289 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 290
 291 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 292                                     struct ethtool_drvinfo *info)
 293 {
 294         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 295         strlcpy(info->version, "0.1", sizeof(info->version));
 296         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 297 }
 298
 299 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 300 {
 301         struct bcm_sysport_priv *priv = netdev_priv(dev);
 302
 303         return priv->msg_enable;
 304 }
 305
 306 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 307 {
 308         struct bcm_sysport_priv *priv = netdev_priv(dev);
 309
 310         priv->msg_enable = enable;
 311 }
 312
 313 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 314 {
 315         switch (type) {
 316         case BCM_SYSPORT_STAT_NETDEV:
 317         case BCM_SYSPORT_STAT_RXCHK:
 318         case BCM_SYSPORT_STAT_RBUF:
 319         case BCM_SYSPORT_STAT_SOFT:
 320                 return true;
 321         default:
 322                 return false;
 323         }
 324 }
 325
 326 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 327 {
 328         struct bcm_sysport_priv *priv = netdev_priv(dev);
 329         const struct bcm_sysport_stats *s;
 330         unsigned int i, j;
 331
 332         switch (string_set) {
 333         case ETH_SS_STATS:
 334                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 335                         s = &bcm_sysport_gstrings_stats[i];
 336                         if (priv->is_lite &&
 337                             !bcm_sysport_lite_stat_valid(s->type))
 338                                 continue;
 339                         j++;
 340                 }
 341                 return j;
 342         default:
 343                 return -EOPNOTSUPP;
 344         }
 345 }
 346
 347 static void bcm_sysport_get_strings(struct net_device *dev,
 348                                     u32 stringset, u8 *data)
 349 {
 350         struct bcm_sysport_priv *priv = netdev_priv(dev);
 351         const struct bcm_sysport_stats *s;
 352         int i, j;
 353
 354         switch (stringset) {
 355         case ETH_SS_STATS:
 356                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 357                         s = &bcm_sysport_gstrings_stats[i];
 358                         if (priv->is_lite &&
 359                             !bcm_sysport_lite_stat_valid(s->type))
 360                                 continue;
 361
 362                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 363                                ETH_GSTRING_LEN);
 364                         j++;
 365                 }
 366                 break;
 367         default:
 368                 break;
 369         }
 370 }
 371
 372 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 373 {
 374         int i, j = 0;
 375
 376         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 377                 const struct bcm_sysport_stats *s;
 378                 u8 offset = 0;
 379                 u32 val = 0;
 380                 char *p;
 381
 382                 s = &bcm_sysport_gstrings_stats[i];
 383                 switch (s->type) {
 384                 case BCM_SYSPORT_STAT_NETDEV:
 385                 case BCM_SYSPORT_STAT_SOFT:
 386                         continue;
 387                 case BCM_SYSPORT_STAT_MIB_RX:
 388                 case BCM_SYSPORT_STAT_MIB_TX:
 389                 case BCM_SYSPORT_STAT_RUNT:
 390                         if (priv->is_lite)
 391                                 continue;
 392
 393                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 394                                 offset = UMAC_MIB_STAT_OFFSET;
 395                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 396                         break;
 397                 case BCM_SYSPORT_STAT_RXCHK:
 398                         val = rxchk_readl(priv, s->reg_offset);
 399                         if (val == ~0)
 400                                 rxchk_writel(priv, 0, s->reg_offset);
 401                         break;
 402                 case BCM_SYSPORT_STAT_RBUF:
 403                         val = rbuf_readl(priv, s->reg_offset);
 404                         if (val == ~0)
 405                                 rbuf_writel(priv, 0, s->reg_offset);
 406                         break;
 407                 }
 408
 409                 j += s->stat_sizeof;
 410                 p = (char *)priv + s->stat_offset;
 411                 *(u32 *)p = val;
 412         }
 413
 414         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 415 }
 416
 417 static void bcm_sysport_get_stats(struct net_device *dev,
 418                                   struct ethtool_stats *stats, u64 *data)
 419 {
 420         struct bcm_sysport_priv *priv = netdev_priv(dev);
 421         int i, j;
 422
 423         if (netif_running(dev))
 424                 bcm_sysport_update_mib_counters(priv);
 425
 426         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 427                 const struct bcm_sysport_stats *s;
 428                 char *p;
 429
 430                 s = &bcm_sysport_gstrings_stats[i];
 431                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 432                         p = (char *)&dev->stats;
 433                 else
 434                         p = (char *)priv;
 435                 p += s->stat_offset;
 436                 data[j] = *(unsigned long *)p;
 437                 j++;
 438         }
 439 }
 440
 441 static void bcm_sysport_get_wol(struct net_device *dev,
 442                                 struct ethtool_wolinfo *wol)
 443 {
 444         struct bcm_sysport_priv *priv = netdev_priv(dev);
 445         u32 reg;
 446
 447         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
 448         wol->wolopts = priv->wolopts;
 449
 450         if (!(priv->wolopts & WAKE_MAGICSECURE))
 451                 return;
 452
 453         /* Return the programmed SecureOn password */
 454         reg = umac_readl(priv, UMAC_PSW_MS);
 455         put_unaligned_be16(reg, &wol->sopass[0]);
 456         reg = umac_readl(priv, UMAC_PSW_LS);
 457         put_unaligned_be32(reg, &wol->sopass[2]);
 458 }
 459
 460 static int bcm_sysport_set_wol(struct net_device *dev,
 461                                struct ethtool_wolinfo *wol)
 462 {
 463         struct bcm_sysport_priv *priv = netdev_priv(dev);
 464         struct device *kdev = &priv->pdev->dev;
 465         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE;
 466
 467         if (!device_can_wakeup(kdev))
 468                 return -ENOTSUPP;
 469
 470         if (wol->wolopts & ~supported)
 471                 return -EINVAL;
 472
 473         /* Program the SecureOn password */
 474         if (wol->wolopts & WAKE_MAGICSECURE) {
 475                 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
 476                             UMAC_PSW_MS);
 477                 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
 478                             UMAC_PSW_LS);
 479         }
 480
 481         /* Flag the device and relevant IRQ as wakeup capable */
 482         if (wol->wolopts) {
 483                 device_set_wakeup_enable(kdev, 1);
 484                 if (priv->wol_irq_disabled)
 485                         enable_irq_wake(priv->wol_irq);
 486                 priv->wol_irq_disabled = 0;
 487         } else {
 488                 device_set_wakeup_enable(kdev, 0);
 489                 /* Avoid unbalanced disable_irq_wake calls */
 490                 if (!priv->wol_irq_disabled)
 491                         disable_irq_wake(priv->wol_irq);
 492                 priv->wol_irq_disabled = 1;
 493         }
 494
 495         priv->wolopts = wol->wolopts;
 496
 497         return 0;
 498 }
 499
 500 static int bcm_sysport_get_coalesce(struct net_device *dev,
 501                                     struct ethtool_coalesce *ec)
 502 {
 503         struct bcm_sysport_priv *priv = netdev_priv(dev);
 504         u32 reg;
 505
 506         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 507
 508         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 509         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 510
 511         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 512
 513         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 514         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 515
 516         return 0;
 517 }
 518
 519 static int bcm_sysport_set_coalesce(struct net_device *dev,
 520                                     struct ethtool_coalesce *ec)
 521 {
 522         struct bcm_sysport_priv *priv = netdev_priv(dev);
 523         unsigned int i;
 524         u32 reg;
 525
 526         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 527          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 528          * to fit in the RING_TIMEOUT_MASK (16 bits).
 529          */
 530         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 531             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 532             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 533             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 534                 return -EINVAL;
 535
 536         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 537             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 538                 return -EINVAL;
 539
 540         for (i = 0; i < dev->num_tx_queues; i++) {
 541                 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(i));
 542                 reg &= ~(RING_INTR_THRESH_MASK |
 543                          RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 544                 reg |= ec->tx_max_coalesced_frames;
 545                 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 546                          RING_TIMEOUT_SHIFT;
 547                 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(i));
 548         }
 549
 550         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 551         reg &= ~(RDMA_INTR_THRESH_MASK |
 552                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 553         reg |= ec->rx_max_coalesced_frames;
 554         reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192) <<
 555                             RDMA_TIMEOUT_SHIFT;
 556         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 557
 558         return 0;
 559 }
 560
 561 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 562 {
 563         dev_kfree_skb_any(cb->skb);
 564         cb->skb = NULL;
 565         dma_unmap_addr_set(cb, dma_addr, 0);
 566 }
 567
 568 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 569                                              struct bcm_sysport_cb *cb)
 570 {
 571         struct device *kdev = &priv->pdev->dev;
 572         struct net_device *ndev = priv->netdev;
 573         struct sk_buff *skb, *rx_skb;
 574         dma_addr_t mapping;
 575
 576         /* Allocate a new SKB for a new packet */
 577         skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
 578         if (!skb) {
 579                 priv->mib.alloc_rx_buff_failed++;
 580                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 581                 return NULL;
 582         }
 583
 584         mapping = dma_map_single(kdev, skb->data,
 585                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 586         if (dma_mapping_error(kdev, mapping)) {
 587                 priv->mib.rx_dma_failed++;
 588                 dev_kfree_skb_any(skb);
 589                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 590                 return NULL;
 591         }
 592
 593         /* Grab the current SKB on the ring */
 594         rx_skb = cb->skb;
 595         if (likely(rx_skb))
 596                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 597                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 598
 599         /* Put the new SKB on the ring */
 600         cb->skb = skb;
 601         dma_unmap_addr_set(cb, dma_addr, mapping);
 602         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 603
 604         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 605
 606         /* Return the current SKB to the caller */
 607         return rx_skb;
 608 }
 609
 610 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 611 {
 612         struct bcm_sysport_cb *cb;
 613         struct sk_buff *skb;
 614         unsigned int i;
 615
 616         for (i = 0; i < priv->num_rx_bds; i++) {
 617                 cb = &priv->rx_cbs[i];
 618                 skb = bcm_sysport_rx_refill(priv, cb);
 619                 if (skb)
 620                         dev_kfree_skb(skb);
 621                 if (!cb->skb)
 622                         return -ENOMEM;
 623         }
 624
 625         return 0;
 626 }
 627
 628 /* Poll the hardware for up to budget packets to process */
 629 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 630                                         unsigned int budget)
 631 {
 632         struct net_device *ndev = priv->netdev;
 633         unsigned int processed = 0, to_process;
 634         struct bcm_sysport_cb *cb;
 635         struct sk_buff *skb;
 636         unsigned int p_index;
 637         u16 len, status;
 638         struct bcm_rsb *rsb;
 639
 640         /* Determine how much we should process since last call, SYSTEMPORT Lite
 641          * groups the producer and consumer indexes into the same 32-bit
 642          * which we access using RDMA_CONS_INDEX
 643          */
 644         if (!priv->is_lite)
 645                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 646         else
 647                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 648         p_index &= RDMA_PROD_INDEX_MASK;
 649
 650         if (p_index < priv->rx_c_index)
 651                 to_process = (RDMA_CONS_INDEX_MASK + 1) -
 652                         priv->rx_c_index + p_index;
 653         else
 654                 to_process = p_index - priv->rx_c_index;
 655
 656         netif_dbg(priv, rx_status, ndev,
 657                   "p_index=%d rx_c_index=%d to_process=%d\n",
 658                   p_index, priv->rx_c_index, to_process);
 659
 660         while ((processed < to_process) && (processed < budget)) {
 661                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 662                 skb = bcm_sysport_rx_refill(priv, cb);
 663
 664
 665                 /* We do not have a backing SKB, so we do not a corresponding
 666                  * DMA mapping for this incoming packet since
 667                  * bcm_sysport_rx_refill always either has both skb and mapping
 668                  * or none.
 669                  */
 670                 if (unlikely(!skb)) {
 671                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 672                         ndev->stats.rx_dropped++;
 673                         ndev->stats.rx_errors++;
 674                         goto next;
 675                 }
 676
 677                 /* Extract the Receive Status Block prepended */
 678                 rsb = (struct bcm_rsb *)skb->data;
 679                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 680                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 681                           DESC_STATUS_MASK;
 682
 683                 netif_dbg(priv, rx_status, ndev,
 684                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 685                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 686                           len, status);
 687
 688                 if (unlikely(len > RX_BUF_LENGTH)) {
 689                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 690                         ndev->stats.rx_length_errors++;
 691                         ndev->stats.rx_errors++;
 692                         dev_kfree_skb_any(skb);
 693                         goto next;
 694                 }
 695
 696                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 697                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 698                         ndev->stats.rx_dropped++;
 699                         ndev->stats.rx_errors++;
 700                         dev_kfree_skb_any(skb);
 701                         goto next;
 702                 }
 703
 704                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 705                         netif_err(priv, rx_err, ndev, "error packet\n");
 706                         if (status & RX_STATUS_OVFLOW)
 707                                 ndev->stats.rx_over_errors++;
 708                         ndev->stats.rx_dropped++;
 709                         ndev->stats.rx_errors++;
 710                         dev_kfree_skb_any(skb);
 711                         goto next;
 712                 }
 713
 714                 skb_put(skb, len);
 715
 716                 /* Hardware validated our checksum */
 717                 if (likely(status & DESC_L4_CSUM))
 718                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 719
 720                 /* Hardware pre-pends packets with 2bytes before Ethernet
 721                  * header plus we have the Receive Status Block, strip off all
 722                  * of this from the SKB.
 723                  */
 724                 skb_pull(skb, sizeof(*rsb) + 2);
 725                 len -= (sizeof(*rsb) + 2);
 726
 727                 /* UniMAC may forward CRC */
 728                 if (priv->crc_fwd) {
 729                         skb_trim(skb, len - ETH_FCS_LEN);
 730                         len -= ETH_FCS_LEN;
 731                 }
 732
 733                 skb->protocol = eth_type_trans(skb, ndev);
 734                 ndev->stats.rx_packets++;
 735                 ndev->stats.rx_bytes += len;
 736
 737                 napi_gro_receive(&priv->napi, skb);
 738 next:
 739                 processed++;
 740                 priv->rx_read_ptr++;
 741
 742                 if (priv->rx_read_ptr == priv->num_rx_bds)
 743                         priv->rx_read_ptr = 0;
 744         }
 745
 746         return processed;
 747 }
 748
 749 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_priv *priv,
 750                                        struct bcm_sysport_cb *cb,
 751                                        unsigned int *bytes_compl,
 752                                        unsigned int *pkts_compl)
 753 {
 754         struct device *kdev = &priv->pdev->dev;
 755         struct net_device *ndev = priv->netdev;
 756
 757         if (cb->skb) {
 758                 ndev->stats.tx_bytes += cb->skb->len;
 759                 *bytes_compl += cb->skb->len;
 760                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 761                                  dma_unmap_len(cb, dma_len),
 762                                  DMA_TO_DEVICE);
 763                 ndev->stats.tx_packets++;
 764                 (*pkts_compl)++;
 765                 bcm_sysport_free_cb(cb);
 766         /* SKB fragment */
 767         } else if (dma_unmap_addr(cb, dma_addr)) {
 768                 ndev->stats.tx_bytes += dma_unmap_len(cb, dma_len);
 769                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 770                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 771                 dma_unmap_addr_set(cb, dma_addr, 0);
 772         }
 773 }
 774
 775 /* Reclaim queued SKBs for transmission completion, lockless version */
 776 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 777                                              struct bcm_sysport_tx_ring *ring)
 778 {
 779         struct net_device *ndev = priv->netdev;
 780         unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs;
 781         unsigned int pkts_compl = 0, bytes_compl = 0;
 782         struct bcm_sysport_cb *cb;
 783         u32 hw_ind;
 784
 785         /* Compute how many descriptors have been processed since last call */
 786         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 787         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 788         ring->p_index = (hw_ind & RING_PROD_INDEX_MASK);
 789
 790         last_c_index = ring->c_index;
 791         num_tx_cbs = ring->size;
 792
 793         c_index &= (num_tx_cbs - 1);
 794
 795         if (c_index >= last_c_index)
 796                 last_tx_cn = c_index - last_c_index;
 797         else
 798                 last_tx_cn = num_tx_cbs - last_c_index + c_index;
 799
 800         netif_dbg(priv, tx_done, ndev,
 801                   "ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n",
 802                   ring->index, c_index, last_tx_cn, last_c_index);
 803
 804         while (last_tx_cn-- > 0) {
 805                 cb = ring->cbs + last_c_index;
 806                 bcm_sysport_tx_reclaim_one(priv, cb, &bytes_compl, &pkts_compl);
 807
 808                 ring->desc_count++;
 809                 last_c_index++;
 810                 last_c_index &= (num_tx_cbs - 1);
 811         }
 812
 813         ring->c_index = c_index;
 814
 815         netif_dbg(priv, tx_done, ndev,
 816                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 817                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 818
 819         return pkts_compl;
 820 }
 821
 822 /* Locked version of the per-ring TX reclaim routine */
 823 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 824                                            struct bcm_sysport_tx_ring *ring)
 825 {
 826         struct netdev_queue *txq;
 827         unsigned int released;
 828         unsigned long flags;
 829
 830         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 831
 832         spin_lock_irqsave(&ring->lock, flags);
 833         released = __bcm_sysport_tx_reclaim(priv, ring);
 834         if (released)
 835                 netif_tx_wake_queue(txq);
 836
 837         spin_unlock_irqrestore(&ring->lock, flags);
 838
 839         return released;
 840 }
 841
 842 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 843 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 844                                  struct bcm_sysport_tx_ring *ring)
 845 {
 846         unsigned long flags;
 847
 848         spin_lock_irqsave(&ring->lock, flags);
 849         __bcm_sysport_tx_reclaim(priv, ring);
 850         spin_unlock_irqrestore(&ring->lock, flags);
 851 }
 852
 853 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 854 {
 855         struct bcm_sysport_tx_ring *ring =
 856                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 857         unsigned int work_done = 0;
 858
 859         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 860
 861         if (work_done == 0) {
 862                 napi_complete(napi);
 863                 /* re-enable TX interrupt */
 864                 if (!ring->priv->is_lite)
 865                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 866                 else
 867                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 868                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 869
 870                 return 0;
 871         }
 872
 873         return budget;
 874 }
 875
 876 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
 877 {
 878         unsigned int q;
 879
 880         for (q = 0; q < priv->netdev->num_tx_queues; q++)
 881                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
 882 }
 883
 884 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
 885 {
 886         struct bcm_sysport_priv *priv =
 887                 container_of(napi, struct bcm_sysport_priv, napi);
 888         unsigned int work_done = 0;
 889
 890         work_done = bcm_sysport_desc_rx(priv, budget);
 891
 892         priv->rx_c_index += work_done;
 893         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
 894
 895         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
 896          * maintained by HW, but writes to it will be ignore while RDMA
 897          * is active
 898          */
 899         if (!priv->is_lite)
 900                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
 901         else
 902                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
 903
 904         if (work_done < budget) {
 905                 napi_complete_done(napi, work_done);
 906                 /* re-enable RX interrupts */
 907                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
 908         }
 909
 910         return work_done;
 911 }
 912
 913 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
 914 {
 915         u32 reg;
 916
 917         /* Stop monitoring MPD interrupt */
 918         intrl2_0_mask_set(priv, INTRL2_0_MPD);
 919
 920         /* Clear the MagicPacket detection logic */
 921         reg = umac_readl(priv, UMAC_MPD_CTRL);
 922         reg &= ~MPD_EN;
 923         umac_writel(priv, reg, UMAC_MPD_CTRL);
 924
 925         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
 926 }
 927
 928 /* RX and misc interrupt routine */
 929 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
 930 {
 931         struct net_device *dev = dev_id;
 932         struct bcm_sysport_priv *priv = netdev_priv(dev);
 933         struct bcm_sysport_tx_ring *txr;
 934         unsigned int ring, ring_bit;
 935
 936         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
 937                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
 938         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
 939
 940         if (unlikely(priv->irq0_stat == 0)) {
 941                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
 942                 return IRQ_NONE;
 943         }
 944
 945         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
 946                 if (likely(napi_schedule_prep(&priv->napi))) {
 947                         /* disable RX interrupts */
 948                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
 949                         __napi_schedule_irqoff(&priv->napi);
 950                 }
 951         }
 952
 953         /* TX ring is full, perform a full reclaim since we do not know
 954          * which one would trigger this interrupt
 955          */
 956         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
 957                 bcm_sysport_tx_reclaim_all(priv);
 958
 959         if (priv->irq0_stat & INTRL2_0_MPD) {
 960                 netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n");
 961                 bcm_sysport_resume_from_wol(priv);
 962         }
 963
 964         if (!priv->is_lite)
 965                 goto out;
 966
 967         for (ring = 0; ring < dev->num_tx_queues; ring++) {
 968                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
 969                 if (!(priv->irq0_stat & ring_bit))
 970                         continue;
 971
 972                 txr = &priv->tx_rings[ring];
 973
 974                 if (likely(napi_schedule_prep(&txr->napi))) {
 975                         intrl2_0_mask_set(priv, ring_bit);
 976                         __napi_schedule(&txr->napi);
 977                 }
 978         }
 979 out:
 980         return IRQ_HANDLED;
 981 }
 982
 983 /* TX interrupt service routine */
 984 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
 985 {
 986         struct net_device *dev = dev_id;
 987         struct bcm_sysport_priv *priv = netdev_priv(dev);
 988         struct bcm_sysport_tx_ring *txr;
 989         unsigned int ring;
 990
 991         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
 992                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
 993         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
 994
 995         if (unlikely(priv->irq1_stat == 0)) {
 996                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
 997                 return IRQ_NONE;
 998         }
 999
1000         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1001                 if (!(priv->irq1_stat & BIT(ring)))
1002                         continue;
1003
1004                 txr = &priv->tx_rings[ring];
1005
1006                 if (likely(napi_schedule_prep(&txr->napi))) {
1007                         intrl2_1_mask_set(priv, BIT(ring));
1008                         __napi_schedule_irqoff(&txr->napi);
1009                 }
1010         }
1011
1012         return IRQ_HANDLED;
1013 }
1014
1015 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1016 {
1017         struct bcm_sysport_priv *priv = dev_id;
1018
1019         pm_wakeup_event(&priv->pdev->dev, 0);
1020
1021         return IRQ_HANDLED;
1022 }
1023
1024 #ifdef CONFIG_NET_POLL_CONTROLLER
1025 static void bcm_sysport_poll_controller(struct net_device *dev)
1026 {
1027         struct bcm_sysport_priv *priv = netdev_priv(dev);
1028
1029         disable_irq(priv->irq0);
1030         bcm_sysport_rx_isr(priv->irq0, priv);
1031         enable_irq(priv->irq0);
1032
1033         if (!priv->is_lite) {
1034                 disable_irq(priv->irq1);
1035                 bcm_sysport_tx_isr(priv->irq1, priv);
1036                 enable_irq(priv->irq1);
1037         }
1038 }
1039 #endif
1040
1041 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1042                                               struct net_device *dev)
1043 {
1044         struct sk_buff *nskb;
1045         struct bcm_tsb *tsb;
1046         u32 csum_info;
1047         u8 ip_proto;
1048         u16 csum_start;
1049         u16 ip_ver;
1050
1051         /* Re-allocate SKB if needed */
1052         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1053                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1054                 dev_kfree_skb(skb);
1055                 if (!nskb) {
1056                         dev->stats.tx_errors++;
1057                         dev->stats.tx_dropped++;
1058                         return NULL;
1059                 }
1060                 skb = nskb;
1061         }
1062
1063         tsb = (struct bcm_tsb *)skb_push(skb, sizeof(*tsb));
1064         /* Zero-out TSB by default */
1065         memset(tsb, 0, sizeof(*tsb));
1066
1067         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1068                 ip_ver = htons(skb->protocol);
1069                 switch (ip_ver) {
1070                 case ETH_P_IP:
1071                         ip_proto = ip_hdr(skb)->protocol;
1072                         break;
1073                 case ETH_P_IPV6:
1074                         ip_proto = ipv6_hdr(skb)->nexthdr;
1075                         break;
1076                 default:
1077                         return skb;
1078                 }
1079
1080                 /* Get the checksum offset and the L4 (transport) offset */
1081                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1082                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1083                 csum_info |= (csum_start << L4_PTR_SHIFT);
1084
1085                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1086                         csum_info |= L4_LENGTH_VALID;
1087                         if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
1088                                 csum_info |= L4_UDP;
1089                 } else {
1090                         csum_info = 0;
1091                 }
1092
1093                 tsb->l4_ptr_dest_map = csum_info;
1094         }
1095
1096         return skb;
1097 }
1098
1099 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1100                                     struct net_device *dev)
1101 {
1102         struct bcm_sysport_priv *priv = netdev_priv(dev);
1103         struct device *kdev = &priv->pdev->dev;
1104         struct bcm_sysport_tx_ring *ring;
1105         struct bcm_sysport_cb *cb;
1106         struct netdev_queue *txq;
1107         struct dma_desc *desc;
1108         unsigned int skb_len;
1109         unsigned long flags;
1110         dma_addr_t mapping;
1111         u32 len_status;
1112         u16 queue;
1113         int ret;
1114
1115         queue = skb_get_queue_mapping(skb);
1116         txq = netdev_get_tx_queue(dev, queue);
1117         ring = &priv->tx_rings[queue];
1118
1119         /* lock against tx reclaim in BH context and TX ring full interrupt */
1120         spin_lock_irqsave(&ring->lock, flags);
1121         if (unlikely(ring->desc_count == 0)) {
1122                 netif_tx_stop_queue(txq);
1123                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1124                 ret = NETDEV_TX_BUSY;
1125                 goto out;
1126         }
1127
1128         /* The Ethernet switch we are interfaced with needs packets to be at
1129          * least 64 bytes (including FCS) otherwise they will be discarded when
1130          * they enter the switch port logic. When Broadcom tags are enabled, we
1131          * need to make sure that packets are at least 68 bytes
1132          * (including FCS and tag) because the length verification is done after
1133          * the Broadcom tag is stripped off the ingress packet.
1134          */
1135         if (skb_put_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) {
1136                 ret = NETDEV_TX_OK;
1137                 goto out;
1138         }
1139
1140         /* Insert TSB and checksum infos */
1141         if (priv->tsb_en) {
1142                 skb = bcm_sysport_insert_tsb(skb, dev);
1143                 if (!skb) {
1144                         ret = NETDEV_TX_OK;
1145                         goto out;
1146                 }
1147         }
1148
1149         skb_len = skb->len;
1150
1151         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1152         if (dma_mapping_error(kdev, mapping)) {
1153                 priv->mib.tx_dma_failed++;
1154                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1155                           skb->data, skb_len);
1156                 ret = NETDEV_TX_OK;
1157                 goto out;
1158         }
1159
1160         /* Remember the SKB for future freeing */
1161         cb = &ring->cbs[ring->curr_desc];
1162         cb->skb = skb;
1163         dma_unmap_addr_set(cb, dma_addr, mapping);
1164         dma_unmap_len_set(cb, dma_len, skb_len);
1165
1166         /* Fetch a descriptor entry from our pool */
1167         desc = ring->desc_cpu;
1168
1169         desc->addr_lo = lower_32_bits(mapping);
1170         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1171         len_status |= (skb_len << DESC_LEN_SHIFT);
1172         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1173                        DESC_STATUS_SHIFT;
1174         if (skb->ip_summed == CHECKSUM_PARTIAL)
1175                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1176
1177         ring->curr_desc++;
1178         if (ring->curr_desc == ring->size)
1179                 ring->curr_desc = 0;
1180         ring->desc_count--;
1181
1182         /* Ensure write completion of the descriptor status/length
1183          * in DRAM before the System Port WRITE_PORT register latches
1184          * the value
1185          */
1186         wmb();
1187         desc->addr_status_len = len_status;
1188         wmb();
1189
1190         /* Write this descriptor address to the RING write port */
1191         tdma_port_write_desc_addr(priv, desc, ring->index);
1192
1193         /* Check ring space and update SW control flow */
1194         if (ring->desc_count == 0)
1195                 netif_tx_stop_queue(txq);
1196
1197         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1198                   ring->index, ring->desc_count, ring->curr_desc);
1199
1200         ret = NETDEV_TX_OK;
1201 out:
1202         spin_unlock_irqrestore(&ring->lock, flags);
1203         return ret;
1204 }
1205
1206 static void bcm_sysport_tx_timeout(struct net_device *dev)
1207 {
1208         netdev_warn(dev, "transmit timeout!\n");
1209
1210         netif_trans_update(dev);
1211         dev->stats.tx_errors++;
1212
1213         netif_tx_wake_all_queues(dev);
1214 }
1215
1216 /* phylib adjust link callback */
1217 static void bcm_sysport_adj_link(struct net_device *dev)
1218 {
1219         struct bcm_sysport_priv *priv = netdev_priv(dev);
1220         struct phy_device *phydev = dev->phydev;
1221         unsigned int changed = 0;
1222         u32 cmd_bits = 0, reg;
1223
1224         if (priv->old_link != phydev->link) {
1225                 changed = 1;
1226                 priv->old_link = phydev->link;
1227         }
1228
1229         if (priv->old_duplex != phydev->duplex) {
1230                 changed = 1;
1231                 priv->old_duplex = phydev->duplex;
1232         }
1233
1234         if (priv->is_lite)
1235                 goto out;
1236
1237         switch (phydev->speed) {
1238         case SPEED_2500:
1239                 cmd_bits = CMD_SPEED_2500;
1240                 break;
1241         case SPEED_1000:
1242                 cmd_bits = CMD_SPEED_1000;
1243                 break;
1244         case SPEED_100:
1245                 cmd_bits = CMD_SPEED_100;
1246                 break;
1247         case SPEED_10:
1248                 cmd_bits = CMD_SPEED_10;
1249                 break;
1250         default:
1251                 break;
1252         }
1253         cmd_bits <<= CMD_SPEED_SHIFT;
1254
1255         if (phydev->duplex == DUPLEX_HALF)
1256                 cmd_bits |= CMD_HD_EN;
1257
1258         if (priv->old_pause != phydev->pause) {
1259                 changed = 1;
1260                 priv->old_pause = phydev->pause;
1261         }
1262
1263         if (!phydev->pause)
1264                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1265
1266         if (!changed)
1267                 return;
1268
1269         if (phydev->link) {
1270                 reg = umac_readl(priv, UMAC_CMD);
1271                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1272                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1273                         CMD_TX_PAUSE_IGNORE);
1274                 reg |= cmd_bits;
1275                 umac_writel(priv, reg, UMAC_CMD);
1276         }
1277 out:
1278         if (changed)
1279                 phy_print_status(phydev);
1280 }
1281
1282 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1283                                     unsigned int index)
1284 {
1285         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1286         struct device *kdev = &priv->pdev->dev;
1287         size_t size;
1288         void *p;
1289         u32 reg;
1290
1291         /* Simple descriptors partitioning for now */
1292         size = 256;
1293
1294         /* We just need one DMA descriptor which is DMA-able, since writing to
1295          * the port will allocate a new descriptor in its internal linked-list
1296          */
1297         p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1298                                 GFP_KERNEL);
1299         if (!p) {
1300                 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1301                 return -ENOMEM;
1302         }
1303
1304         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1305         if (!ring->cbs) {
1306                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1307                 return -ENOMEM;
1308         }
1309
1310         /* Initialize SW view of the ring */
1311         spin_lock_init(&ring->lock);
1312         ring->priv = priv;
1313         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1314         ring->index = index;
1315         ring->size = size;
1316         ring->alloc_size = ring->size;
1317         ring->desc_cpu = p;
1318         ring->desc_count = ring->size;
1319         ring->curr_desc = 0;
1320
1321         /* Initialize HW ring */
1322         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1323         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1324         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1325         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1326         tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index));
1327         tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1328
1329         /* Program the number of descriptors as MAX_THRESHOLD and half of
1330          * its size for the hysteresis trigger
1331          */
1332         tdma_writel(priv, ring->size |
1333                         1 << RING_HYST_THRESH_SHIFT,
1334                         TDMA_DESC_RING_MAX_HYST(index));
1335
1336         /* Enable the ring queue in the arbiter */
1337         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1338         reg |= (1 << index);
1339         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1340
1341         napi_enable(&ring->napi);
1342
1343         netif_dbg(priv, hw, priv->netdev,
1344                   "TDMA cfg, size=%d, desc_cpu=%p\n",
1345                   ring->size, ring->desc_cpu);
1346
1347         return 0;
1348 }
1349
1350 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1351                                      unsigned int index)
1352 {
1353         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1354         struct device *kdev = &priv->pdev->dev;
1355         u32 reg;
1356
1357         /* Caller should stop the TDMA engine */
1358         reg = tdma_readl(priv, TDMA_STATUS);
1359         if (!(reg & TDMA_DISABLED))
1360                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1361
1362         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1363          * fail, so by checking this pointer we know whether the TX ring was
1364          * fully initialized or not.
1365          */
1366         if (!ring->cbs)
1367                 return;
1368
1369         napi_disable(&ring->napi);
1370         netif_napi_del(&ring->napi);
1371
1372         bcm_sysport_tx_clean(priv, ring);
1373
1374         kfree(ring->cbs);
1375         ring->cbs = NULL;
1376
1377         if (ring->desc_dma) {
1378                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1379                                   ring->desc_cpu, ring->desc_dma);
1380                 ring->desc_dma = 0;
1381         }
1382         ring->size = 0;
1383         ring->alloc_size = 0;
1384
1385         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1386 }
1387
1388 /* RDMA helper */
1389 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1390                                   unsigned int enable)
1391 {
1392         unsigned int timeout = 1000;
1393         u32 reg;
1394
1395         reg = rdma_readl(priv, RDMA_CONTROL);
1396         if (enable)
1397                 reg |= RDMA_EN;
1398         else
1399                 reg &= ~RDMA_EN;
1400         rdma_writel(priv, reg, RDMA_CONTROL);
1401
1402         /* Poll for RMDA disabling completion */
1403         do {
1404                 reg = rdma_readl(priv, RDMA_STATUS);
1405                 if (!!(reg & RDMA_DISABLED) == !enable)
1406                         return 0;
1407                 usleep_range(1000, 2000);
1408         } while (timeout-- > 0);
1409
1410         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1411
1412         return -ETIMEDOUT;
1413 }
1414
1415 /* TDMA helper */
1416 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1417                                   unsigned int enable)
1418 {
1419         unsigned int timeout = 1000;
1420         u32 reg;
1421
1422         reg = tdma_readl(priv, TDMA_CONTROL);
1423         if (enable)
1424                 reg |= tdma_control_bit(priv, TDMA_EN);
1425         else
1426                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1427         tdma_writel(priv, reg, TDMA_CONTROL);
1428
1429         /* Poll for TMDA disabling completion */
1430         do {
1431                 reg = tdma_readl(priv, TDMA_STATUS);
1432                 if (!!(reg & TDMA_DISABLED) == !enable)
1433                         return 0;
1434
1435                 usleep_range(1000, 2000);
1436         } while (timeout-- > 0);
1437
1438         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1439
1440         return -ETIMEDOUT;
1441 }
1442
1443 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1444 {
1445         struct bcm_sysport_cb *cb;
1446         u32 reg;
1447         int ret;
1448         int i;
1449
1450         /* Initialize SW view of the RX ring */
1451         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1452         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1453         priv->rx_c_index = 0;
1454         priv->rx_read_ptr = 0;
1455         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1456                                 GFP_KERNEL);
1457         if (!priv->rx_cbs) {
1458                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1459                 return -ENOMEM;
1460         }
1461
1462         for (i = 0; i < priv->num_rx_bds; i++) {
1463                 cb = priv->rx_cbs + i;
1464                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1465         }
1466
1467         ret = bcm_sysport_alloc_rx_bufs(priv);
1468         if (ret) {
1469                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1470                 return ret;
1471         }
1472
1473         /* Initialize HW, ensure RDMA is disabled */
1474         reg = rdma_readl(priv, RDMA_STATUS);
1475         if (!(reg & RDMA_DISABLED))
1476                 rdma_enable_set(priv, 0);
1477
1478         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1479         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1480         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1481         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1482         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1483                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1484         /* Operate the queue in ring mode */
1485         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1486         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1487         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1488         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1489
1490         rdma_writel(priv, 1, RDMA_MBDONE_INTR);
1491
1492         netif_dbg(priv, hw, priv->netdev,
1493                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1494                   priv->num_rx_bds, priv->rx_bds);
1495
1496         return 0;
1497 }
1498
1499 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1500 {
1501         struct bcm_sysport_cb *cb;
1502         unsigned int i;
1503         u32 reg;
1504
1505         /* Caller should ensure RDMA is disabled */
1506         reg = rdma_readl(priv, RDMA_STATUS);
1507         if (!(reg & RDMA_DISABLED))
1508                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1509
1510         for (i = 0; i < priv->num_rx_bds; i++) {
1511                 cb = &priv->rx_cbs[i];
1512                 if (dma_unmap_addr(cb, dma_addr))
1513                         dma_unmap_single(&priv->pdev->dev,
1514                                          dma_unmap_addr(cb, dma_addr),
1515                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1516                 bcm_sysport_free_cb(cb);
1517         }
1518
1519         kfree(priv->rx_cbs);
1520         priv->rx_cbs = NULL;
1521
1522         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1523 }
1524
1525 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1526 {
1527         struct bcm_sysport_priv *priv = netdev_priv(dev);
1528         u32 reg;
1529
1530         if (priv->is_lite)
1531                 return;
1532
1533         reg = umac_readl(priv, UMAC_CMD);
1534         if (dev->flags & IFF_PROMISC)
1535                 reg |= CMD_PROMISC;
1536         else
1537                 reg &= ~CMD_PROMISC;
1538         umac_writel(priv, reg, UMAC_CMD);
1539
1540         /* No support for ALLMULTI */
1541         if (dev->flags & IFF_ALLMULTI)
1542                 return;
1543 }
1544
1545 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1546                                    u32 mask, unsigned int enable)
1547 {
1548         u32 reg;
1549
1550         if (!priv->is_lite) {
1551                 reg = umac_readl(priv, UMAC_CMD);
1552                 if (enable)
1553                         reg |= mask;
1554                 else
1555                         reg &= ~mask;
1556                 umac_writel(priv, reg, UMAC_CMD);
1557         } else {
1558                 reg = gib_readl(priv, GIB_CONTROL);
1559                 if (enable)
1560                         reg |= mask;
1561                 else
1562                         reg &= ~mask;
1563                 gib_writel(priv, reg, GIB_CONTROL);
1564         }
1565
1566         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1567          * to be processed (1 msec).
1568          */
1569         if (enable == 0)
1570                 usleep_range(1000, 2000);
1571 }
1572
1573 static inline void umac_reset(struct bcm_sysport_priv *priv)
1574 {
1575         u32 reg;
1576
1577         if (priv->is_lite)
1578                 return;
1579
1580         reg = umac_readl(priv, UMAC_CMD);
1581         reg |= CMD_SW_RESET;
1582         umac_writel(priv, reg, UMAC_CMD);
1583         udelay(10);
1584         reg = umac_readl(priv, UMAC_CMD);
1585         reg &= ~CMD_SW_RESET;
1586         umac_writel(priv, reg, UMAC_CMD);
1587 }
1588
1589 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1590                              unsigned char *addr)
1591 {
1592         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1593                     addr[3];
1594         u32 mac1 = (addr[4] << 8) | addr[5];
1595
1596         if (!priv->is_lite) {
1597                 umac_writel(priv, mac0, UMAC_MAC0);
1598                 umac_writel(priv, mac1, UMAC_MAC1);
1599         } else {
1600                 gib_writel(priv, mac0, GIB_MAC0);
1601                 gib_writel(priv, mac1, GIB_MAC1);
1602         }
1603 }
1604
1605 static void topctrl_flush(struct bcm_sysport_priv *priv)
1606 {
1607         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1608         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1609         mdelay(1);
1610         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1611         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1612 }
1613
1614 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1615 {
1616         struct bcm_sysport_priv *priv = netdev_priv(dev);
1617         struct sockaddr *addr = p;
1618
1619         if (!is_valid_ether_addr(addr->sa_data))
1620                 return -EINVAL;
1621
1622         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1623
1624         /* interface is disabled, changes to MAC will be reflected on next
1625          * open call
1626          */
1627         if (!netif_running(dev))
1628                 return 0;
1629
1630         umac_set_hw_addr(priv, dev->dev_addr);
1631
1632         return 0;
1633 }
1634
1635 static void bcm_sysport_netif_start(struct net_device *dev)
1636 {
1637         struct bcm_sysport_priv *priv = netdev_priv(dev);
1638
1639         /* Enable NAPI */
1640         napi_enable(&priv->napi);
1641
1642         /* Enable RX interrupt and TX ring full interrupt */
1643         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1644
1645         phy_start(dev->phydev);
1646
1647         /* Enable TX interrupts for the TXQs */
1648         if (!priv->is_lite)
1649                 intrl2_1_mask_clear(priv, 0xffffffff);
1650         else
1651                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1652
1653         /* Last call before we start the real business */
1654         netif_tx_start_all_queues(dev);
1655 }
1656
1657 static void rbuf_init(struct bcm_sysport_priv *priv)
1658 {
1659         u32 reg;
1660
1661         reg = rbuf_readl(priv, RBUF_CONTROL);
1662         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1663         /* Set a correct RSB format on SYSTEMPORT Lite */
1664         if (priv->is_lite) {
1665                 reg &= ~RBUF_RSB_SWAP1;
1666                 reg |= RBUF_RSB_SWAP0;
1667         }
1668         rbuf_writel(priv, reg, RBUF_CONTROL);
1669 }
1670
1671 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1672 {
1673         intrl2_0_mask_set(priv, 0xffffffff);
1674         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1675         if (!priv->is_lite) {
1676                 intrl2_1_mask_set(priv, 0xffffffff);
1677                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1678         }
1679 }
1680
1681 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1682 {
1683         u32 __maybe_unused reg;
1684
1685         /* Include Broadcom tag in pad extension */
1686         if (netdev_uses_dsa(priv->netdev)) {
1687                 reg = gib_readl(priv, GIB_CONTROL);
1688                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1689                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1690                 gib_writel(priv, reg, GIB_CONTROL);
1691         }
1692 }
1693
1694 static int bcm_sysport_open(struct net_device *dev)
1695 {
1696         struct bcm_sysport_priv *priv = netdev_priv(dev);
1697         struct phy_device *phydev;
1698         unsigned int i;
1699         int ret;
1700
1701         /* Reset UniMAC */
1702         umac_reset(priv);
1703
1704         /* Flush TX and RX FIFOs at TOPCTRL level */
1705         topctrl_flush(priv);
1706
1707         /* Disable the UniMAC RX/TX */
1708         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1709
1710         /* Enable RBUF 2bytes alignment and Receive Status Block */
1711         rbuf_init(priv);
1712
1713         /* Set maximum frame length */
1714         if (!priv->is_lite)
1715                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1716         else
1717                 gib_set_pad_extension(priv);
1718
1719         /* Set MAC address */
1720         umac_set_hw_addr(priv, dev->dev_addr);
1721
1722         /* Read CRC forward */
1723         if (!priv->is_lite)
1724                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
1725         else
1726                 priv->crc_fwd = !!(gib_readl(priv, GIB_CONTROL) &
1727                                    GIB_FCS_STRIP);
1728
1729         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1730                                 0, priv->phy_interface);
1731         if (!phydev) {
1732                 netdev_err(dev, "could not attach to PHY\n");
1733                 return -ENODEV;
1734         }
1735
1736         /* Reset house keeping link status */
1737         priv->old_duplex = -1;
1738         priv->old_link = -1;
1739         priv->old_pause = -1;
1740
1741         /* mask all interrupts and request them */
1742         bcm_sysport_mask_all_intrs(priv);
1743
1744         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1745         if (ret) {
1746                 netdev_err(dev, "failed to request RX interrupt\n");
1747                 goto out_phy_disconnect;
1748         }
1749
1750         if (!priv->is_lite) {
1751                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1752                                   dev->name, dev);
1753                 if (ret) {
1754                         netdev_err(dev, "failed to request TX interrupt\n");
1755                         goto out_free_irq0;
1756                 }
1757         }
1758
1759         /* Initialize both hardware and software ring */
1760         for (i = 0; i < dev->num_tx_queues; i++) {
1761                 ret = bcm_sysport_init_tx_ring(priv, i);
1762                 if (ret) {
1763                         netdev_err(dev, "failed to initialize TX ring %d\n",
1764                                    i);
1765                         goto out_free_tx_ring;
1766                 }
1767         }
1768
1769         /* Initialize linked-list */
1770         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1771
1772         /* Initialize RX ring */
1773         ret = bcm_sysport_init_rx_ring(priv);
1774         if (ret) {
1775                 netdev_err(dev, "failed to initialize RX ring\n");
1776                 goto out_free_rx_ring;
1777         }
1778
1779         /* Turn on RDMA */
1780         ret = rdma_enable_set(priv, 1);
1781         if (ret)
1782                 goto out_free_rx_ring;
1783
1784         /* Turn on TDMA */
1785         ret = tdma_enable_set(priv, 1);
1786         if (ret)
1787                 goto out_clear_rx_int;
1788
1789         /* Turn on UniMAC TX/RX */
1790         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
1791
1792         bcm_sysport_netif_start(dev);
1793
1794         return 0;
1795
1796 out_clear_rx_int:
1797         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1798 out_free_rx_ring:
1799         bcm_sysport_fini_rx_ring(priv);
1800 out_free_tx_ring:
1801         for (i = 0; i < dev->num_tx_queues; i++)
1802                 bcm_sysport_fini_tx_ring(priv, i);
1803         if (!priv->is_lite)
1804                 free_irq(priv->irq1, dev);
1805 out_free_irq0:
1806         free_irq(priv->irq0, dev);
1807 out_phy_disconnect:
1808         phy_disconnect(phydev);
1809         return ret;
1810 }
1811
1812 static void bcm_sysport_netif_stop(struct net_device *dev)
1813 {
1814         struct bcm_sysport_priv *priv = netdev_priv(dev);
1815
1816         /* stop all software from updating hardware */
1817         netif_tx_stop_all_queues(dev);
1818         napi_disable(&priv->napi);
1819         phy_stop(dev->phydev);
1820
1821         /* mask all interrupts */
1822         bcm_sysport_mask_all_intrs(priv);
1823 }
1824
1825 static int bcm_sysport_stop(struct net_device *dev)
1826 {
1827         struct bcm_sysport_priv *priv = netdev_priv(dev);
1828         unsigned int i;
1829         int ret;
1830
1831         bcm_sysport_netif_stop(dev);
1832
1833         /* Disable UniMAC RX */
1834         umac_enable_set(priv, CMD_RX_EN, 0);
1835
1836         ret = tdma_enable_set(priv, 0);
1837         if (ret) {
1838                 netdev_err(dev, "timeout disabling RDMA\n");
1839                 return ret;
1840         }
1841
1842         /* Wait for a maximum packet size to be drained */
1843         usleep_range(2000, 3000);
1844
1845         ret = rdma_enable_set(priv, 0);
1846         if (ret) {
1847                 netdev_err(dev, "timeout disabling TDMA\n");
1848                 return ret;
1849         }
1850
1851         /* Disable UniMAC TX */
1852         umac_enable_set(priv, CMD_TX_EN, 0);
1853
1854         /* Free RX/TX rings SW structures */
1855         for (i = 0; i < dev->num_tx_queues; i++)
1856                 bcm_sysport_fini_tx_ring(priv, i);
1857         bcm_sysport_fini_rx_ring(priv);
1858
1859         free_irq(priv->irq0, dev);
1860         if (!priv->is_lite)
1861                 free_irq(priv->irq1, dev);
1862
1863         /* Disconnect from PHY */
1864         phy_disconnect(dev->phydev);
1865
1866         return 0;
1867 }
1868
1869 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
1870         .get_drvinfo            = bcm_sysport_get_drvinfo,
1871         .get_msglevel           = bcm_sysport_get_msglvl,
1872         .set_msglevel           = bcm_sysport_set_msglvl,
1873         .get_link               = ethtool_op_get_link,
1874         .get_strings            = bcm_sysport_get_strings,
1875         .get_ethtool_stats      = bcm_sysport_get_stats,
1876         .get_sset_count         = bcm_sysport_get_sset_count,
1877         .get_wol                = bcm_sysport_get_wol,
1878         .set_wol                = bcm_sysport_set_wol,
1879         .get_coalesce           = bcm_sysport_get_coalesce,
1880         .set_coalesce           = bcm_sysport_set_coalesce,
1881         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
1882         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
1883 };
1884
1885 static const struct net_device_ops bcm_sysport_netdev_ops = {
1886         .ndo_start_xmit         = bcm_sysport_xmit,
1887         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
1888         .ndo_open               = bcm_sysport_open,
1889         .ndo_stop               = bcm_sysport_stop,
1890         .ndo_set_features       = bcm_sysport_set_features,
1891         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
1892         .ndo_set_mac_address    = bcm_sysport_change_mac,
1893 #ifdef CONFIG_NET_POLL_CONTROLLER
1894         .ndo_poll_controller    = bcm_sysport_poll_controller,
1895 #endif
1896 };
1897
1898 #define REV_FMT "v%2x.%02x"
1899
1900 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
1901         [SYSTEMPORT] = {
1902                 .is_lite = false,
1903                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
1904         },
1905         [SYSTEMPORT_LITE] = {
1906                 .is_lite = true,
1907                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
1908         },
1909 };
1910
1911 static const struct of_device_id bcm_sysport_of_match[] = {
1912         { .compatible = "brcm,systemportlite-v1.00",
1913           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
1914         { .compatible = "brcm,systemport-v1.00",
1915           .data = &bcm_sysport_params[SYSTEMPORT] },
1916         { .compatible = "brcm,systemport",
1917           .data = &bcm_sysport_params[SYSTEMPORT] },
1918         { /* sentinel */ }
1919 };
1920 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
1921
1922 static int bcm_sysport_probe(struct platform_device *pdev)
1923 {
1924         const struct bcm_sysport_hw_params *params;
1925         const struct of_device_id *of_id = NULL;
1926         struct bcm_sysport_priv *priv;
1927         struct device_node *dn;
1928         struct net_device *dev;
1929         const void *macaddr;
1930         struct resource *r;
1931         u32 txq, rxq;
1932         int ret;
1933
1934         dn = pdev->dev.of_node;
1935         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1936         of_id = of_match_node(bcm_sysport_of_match, dn);
1937         if (!of_id || !of_id->data)
1938                 return -EINVAL;
1939
1940         /* Fairly quickly we need to know the type of adapter we have */
1941         params = of_id->data;
1942
1943         /* Read the Transmit/Receive Queue properties */
1944         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
1945                 txq = TDMA_NUM_RINGS;
1946         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
1947                 rxq = 1;
1948
1949         /* Sanity check the number of transmit queues */
1950         if (!txq || txq > TDMA_NUM_RINGS)
1951                 return -EINVAL;
1952
1953         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
1954         if (!dev)
1955                 return -ENOMEM;
1956
1957         /* Initialize private members */
1958         priv = netdev_priv(dev);
1959
1960         /* Allocate number of TX rings */
1961         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
1962                                       sizeof(struct bcm_sysport_tx_ring),
1963                                       GFP_KERNEL);
1964         if (!priv->tx_rings)
1965                 return -ENOMEM;
1966
1967         priv->is_lite = params->is_lite;
1968         priv->num_rx_desc_words = params->num_rx_desc_words;
1969
1970         priv->irq0 = platform_get_irq(pdev, 0);
1971         if (!priv->is_lite)
1972                 priv->irq1 = platform_get_irq(pdev, 1);
1973         priv->wol_irq = platform_get_irq(pdev, 2);
1974         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
1975                 dev_err(&pdev->dev, "invalid interrupts\n");
1976                 ret = -EINVAL;
1977                 goto err_free_netdev;
1978         }
1979
1980         priv->base = devm_ioremap_resource(&pdev->dev, r);
1981         if (IS_ERR(priv->base)) {
1982                 ret = PTR_ERR(priv->base);
1983                 goto err_free_netdev;
1984         }
1985
1986         priv->netdev = dev;
1987         priv->pdev = pdev;
1988
1989         priv->phy_interface = of_get_phy_mode(dn);
1990         /* Default to GMII interface mode */
1991         if (priv->phy_interface < 0)
1992                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
1993
1994         /* In the case of a fixed PHY, the DT node associated
1995          * to the PHY is the Ethernet MAC DT node.
1996          */
1997         if (of_phy_is_fixed_link(dn)) {
1998                 ret = of_phy_register_fixed_link(dn);
1999                 if (ret) {
2000                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2001                         goto err_free_netdev;
2002                 }
2003
2004                 priv->phy_dn = dn;
2005         }
2006
2007         /* Initialize netdevice members */
2008         macaddr = of_get_mac_address(dn);
2009         if (!macaddr || !is_valid_ether_addr(macaddr)) {
2010                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2011                 eth_hw_addr_random(dev);
2012         } else {
2013                 ether_addr_copy(dev->dev_addr, macaddr);
2014         }
2015
2016         SET_NETDEV_DEV(dev, &pdev->dev);
2017         dev_set_drvdata(&pdev->dev, dev);
2018         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2019         dev->netdev_ops = &bcm_sysport_netdev_ops;
2020         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2021
2022         /* HW supported features, none enabled by default */
2023         dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2024                                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2025
2026         /* Request the WOL interrupt and advertise suspend if available */
2027         priv->wol_irq_disabled = 1;
2028         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2029                                bcm_sysport_wol_isr, 0, dev->name, priv);
2030         if (!ret)
2031                 device_set_wakeup_capable(&pdev->dev, 1);
2032
2033         /* Set the needed headroom once and for all */
2034         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2035         dev->needed_headroom += sizeof(struct bcm_tsb);
2036
2037         /* libphy will adjust the link state accordingly */
2038         netif_carrier_off(dev);
2039
2040         ret = register_netdev(dev);
2041         if (ret) {
2042                 dev_err(&pdev->dev, "failed to register net_device\n");
2043                 goto err_deregister_fixed_link;
2044         }
2045
2046         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2047         dev_info(&pdev->dev,
2048                  "Broadcom SYSTEMPORT%s" REV_FMT
2049                  " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2050                  priv->is_lite ? " Lite" : "",
2051                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2052                  priv->base, priv->irq0, priv->irq1, txq, rxq);
2053
2054         return 0;
2055
2056 err_deregister_fixed_link:
2057         if (of_phy_is_fixed_link(dn))
2058                 of_phy_deregister_fixed_link(dn);
2059 err_free_netdev:
2060         free_netdev(dev);
2061         return ret;
2062 }
2063
2064 static int bcm_sysport_remove(struct platform_device *pdev)
2065 {
2066         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2067         struct device_node *dn = pdev->dev.of_node;
2068
2069         /* Not much to do, ndo_close has been called
2070          * and we use managed allocations
2071          */
2072         unregister_netdev(dev);
2073         if (of_phy_is_fixed_link(dn))
2074                 of_phy_deregister_fixed_link(dn);
2075         free_netdev(dev);
2076         dev_set_drvdata(&pdev->dev, NULL);
2077
2078         return 0;
2079 }
2080
2081 #ifdef CONFIG_PM_SLEEP
2082 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2083 {
2084         struct net_device *ndev = priv->netdev;
2085         unsigned int timeout = 1000;
2086         u32 reg;
2087
2088         /* Password has already been programmed */
2089         reg = umac_readl(priv, UMAC_MPD_CTRL);
2090         reg |= MPD_EN;
2091         reg &= ~PSW_EN;
2092         if (priv->wolopts & WAKE_MAGICSECURE)
2093                 reg |= PSW_EN;
2094         umac_writel(priv, reg, UMAC_MPD_CTRL);
2095
2096         /* Make sure RBUF entered WoL mode as result */
2097         do {
2098                 reg = rbuf_readl(priv, RBUF_STATUS);
2099                 if (reg & RBUF_WOL_MODE)
2100                         break;
2101
2102                 udelay(10);
2103         } while (timeout-- > 0);
2104
2105         /* Do not leave the UniMAC RBUF matching only MPD packets */
2106         if (!timeout) {
2107                 reg = umac_readl(priv, UMAC_MPD_CTRL);
2108                 reg &= ~MPD_EN;
2109                 umac_writel(priv, reg, UMAC_MPD_CTRL);
2110                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2111                 return -ETIMEDOUT;
2112         }
2113
2114         /* UniMAC receive needs to be turned on */
2115         umac_enable_set(priv, CMD_RX_EN, 1);
2116
2117         /* Enable the interrupt wake-up source */
2118         intrl2_0_mask_clear(priv, INTRL2_0_MPD);
2119
2120         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2121
2122         return 0;
2123 }
2124
2125 static int bcm_sysport_suspend(struct device *d)
2126 {
2127         struct net_device *dev = dev_get_drvdata(d);
2128         struct bcm_sysport_priv *priv = netdev_priv(dev);
2129         unsigned int i;
2130         int ret = 0;
2131         u32 reg;
2132
2133         if (!netif_running(dev))
2134                 return 0;
2135
2136         bcm_sysport_netif_stop(dev);
2137
2138         phy_suspend(dev->phydev);
2139
2140         netif_device_detach(dev);
2141
2142         /* Disable UniMAC RX */
2143         umac_enable_set(priv, CMD_RX_EN, 0);
2144
2145         ret = rdma_enable_set(priv, 0);
2146         if (ret) {
2147                 netdev_err(dev, "RDMA timeout!\n");
2148                 return ret;
2149         }
2150
2151         /* Disable RXCHK if enabled */
2152         if (priv->rx_chk_en) {
2153                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2154                 reg &= ~RXCHK_EN;
2155                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2156         }
2157
2158         /* Flush RX pipe */
2159         if (!priv->wolopts)
2160                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2161
2162         ret = tdma_enable_set(priv, 0);
2163         if (ret) {
2164                 netdev_err(dev, "TDMA timeout!\n");
2165                 return ret;
2166         }
2167
2168         /* Wait for a packet boundary */
2169         usleep_range(2000, 3000);
2170
2171         umac_enable_set(priv, CMD_TX_EN, 0);
2172
2173         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2174
2175         /* Free RX/TX rings SW structures */
2176         for (i = 0; i < dev->num_tx_queues; i++)
2177                 bcm_sysport_fini_tx_ring(priv, i);
2178         bcm_sysport_fini_rx_ring(priv);
2179
2180         /* Get prepared for Wake-on-LAN */
2181         if (device_may_wakeup(d) && priv->wolopts)
2182                 ret = bcm_sysport_suspend_to_wol(priv);
2183
2184         return ret;
2185 }
2186
2187 static int bcm_sysport_resume(struct device *d)
2188 {
2189         struct net_device *dev = dev_get_drvdata(d);
2190         struct bcm_sysport_priv *priv = netdev_priv(dev);
2191         unsigned int i;
2192         u32 reg;
2193         int ret;
2194
2195         if (!netif_running(dev))
2196                 return 0;
2197
2198         umac_reset(priv);
2199
2200         /* We may have been suspended and never received a WOL event that
2201          * would turn off MPD detection, take care of that now
2202          */
2203         bcm_sysport_resume_from_wol(priv);
2204
2205         /* Initialize both hardware and software ring */
2206         for (i = 0; i < dev->num_tx_queues; i++) {
2207                 ret = bcm_sysport_init_tx_ring(priv, i);
2208                 if (ret) {
2209                         netdev_err(dev, "failed to initialize TX ring %d\n",
2210                                    i);
2211                         goto out_free_tx_rings;
2212                 }
2213         }
2214
2215         /* Initialize linked-list */
2216         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2217
2218         /* Initialize RX ring */
2219         ret = bcm_sysport_init_rx_ring(priv);
2220         if (ret) {
2221                 netdev_err(dev, "failed to initialize RX ring\n");
2222                 goto out_free_rx_ring;
2223         }
2224
2225         netif_device_attach(dev);
2226
2227         /* RX pipe enable */
2228         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2229
2230         ret = rdma_enable_set(priv, 1);
2231         if (ret) {
2232                 netdev_err(dev, "failed to enable RDMA\n");
2233                 goto out_free_rx_ring;
2234         }
2235
2236         /* Enable rxhck */
2237         if (priv->rx_chk_en) {
2238                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2239                 reg |= RXCHK_EN;
2240                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2241         }
2242
2243         rbuf_init(priv);
2244
2245         /* Set maximum frame length */
2246         if (!priv->is_lite)
2247                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2248         else
2249                 gib_set_pad_extension(priv);
2250
2251         /* Set MAC address */
2252         umac_set_hw_addr(priv, dev->dev_addr);
2253
2254         umac_enable_set(priv, CMD_RX_EN, 1);
2255
2256         /* TX pipe enable */
2257         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2258
2259         umac_enable_set(priv, CMD_TX_EN, 1);
2260
2261         ret = tdma_enable_set(priv, 1);
2262         if (ret) {
2263                 netdev_err(dev, "TDMA timeout!\n");
2264                 goto out_free_rx_ring;
2265         }
2266
2267         phy_resume(dev->phydev);
2268
2269         bcm_sysport_netif_start(dev);
2270
2271         return 0;
2272
2273 out_free_rx_ring:
2274         bcm_sysport_fini_rx_ring(priv);
2275 out_free_tx_rings:
2276         for (i = 0; i < dev->num_tx_queues; i++)
2277                 bcm_sysport_fini_tx_ring(priv, i);
2278         return ret;
2279 }
2280 #endif
2281
2282 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2283                 bcm_sysport_suspend, bcm_sysport_resume);
2284
2285 static struct platform_driver bcm_sysport_driver = {
2286         .probe  = bcm_sysport_probe,
2287         .remove = bcm_sysport_remove,
2288         .driver =  {
2289                 .name = "brcm-systemport",
2290                 .of_match_table = bcm_sysport_of_match,
2291                 .pm = &bcm_sysport_pm_ops,
2292         },
2293 };
2294 module_platform_driver(bcm_sysport_driver);
2295
2296 MODULE_AUTHOR("Broadcom Corporation");
2297 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2298 MODULE_ALIAS("platform:brcm-systemport");
2299 MODULE_LICENSE("GPL");