linux/drivers/net/cris/eth_v10.c
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   1/*
   2 * e100net.c: A network driver for the ETRAX 100LX network controller.
   3 *
   4 * Copyright (c) 1998-2002 Axis Communications AB.
   5 *
   6 * The outline of this driver comes from skeleton.c.
   7 *
   8 */
   9
  10
  11#include <linux/module.h>
  12
  13#include <linux/kernel.h>
  14#include <linux/delay.h>
  15#include <linux/types.h>
  16#include <linux/fcntl.h>
  17#include <linux/interrupt.h>
  18#include <linux/ptrace.h>
  19#include <linux/ioport.h>
  20#include <linux/in.h>
  21#include <linux/string.h>
  22#include <linux/spinlock.h>
  23#include <linux/errno.h>
  24#include <linux/init.h>
  25#include <linux/bitops.h>
  26
  27#include <linux/if.h>
  28#include <linux/mii.h>
  29#include <linux/netdevice.h>
  30#include <linux/etherdevice.h>
  31#include <linux/skbuff.h>
  32#include <linux/ethtool.h>
  33
  34#include <arch/svinto.h>/* DMA and register descriptions */
  35#include <asm/io.h>         /* CRIS_LED_* I/O functions */
  36#include <asm/irq.h>
  37#include <asm/dma.h>
  38#include <asm/system.h>
  39#include <asm/ethernet.h>
  40#include <asm/cache.h>
  41#include <arch/io_interface_mux.h>
  42
  43//#define ETHDEBUG
  44#define D(x)
  45
  46/*
  47 * The name of the card. Is used for messages and in the requests for
  48 * io regions, irqs and dma channels
  49 */
  50
  51static const char* cardname = "ETRAX 100LX built-in ethernet controller";
  52
  53/* A default ethernet address. Highlevel SW will set the real one later */
  54
  55static struct sockaddr default_mac = {
  56        0,
  57        { 0x00, 0x40, 0x8C, 0xCD, 0x00, 0x00 }
  58};
  59
  60/* Information that need to be kept for each board. */
  61struct net_local {
  62        struct mii_if_info mii_if;
  63
  64        /* Tx control lock.  This protects the transmit buffer ring
  65         * state along with the "tx full" state of the driver.  This
  66         * means all netif_queue flow control actions are protected
  67         * by this lock as well.
  68         */
  69        spinlock_t lock;
  70
  71        spinlock_t led_lock; /* Protect LED state */
  72        spinlock_t transceiver_lock; /* Protect transceiver state. */
  73};
  74
  75typedef struct etrax_eth_descr
  76{
  77        etrax_dma_descr descr;
  78        struct sk_buff* skb;
  79} etrax_eth_descr;
  80
  81/* Some transceivers requires special handling */
  82struct transceiver_ops
  83{
  84        unsigned int oui;
  85        void (*check_speed)(struct net_device* dev);
  86        void (*check_duplex)(struct net_device* dev);
  87};
  88
  89/* Duplex settings */
  90enum duplex
  91{
  92        half,
  93        full,
  94        autoneg
  95};
  96
  97/* Dma descriptors etc. */
  98
  99#define MAX_MEDIA_DATA_SIZE 1522
 100
 101#define MIN_PACKET_LEN      46
 102#define ETHER_HEAD_LEN      14
 103
 104/*
 105** MDIO constants.
 106*/
 107#define MDIO_START                          0x1
 108#define MDIO_READ                           0x2
 109#define MDIO_WRITE                          0x1
 110#define MDIO_PREAMBLE              0xfffffffful
 111
 112/* Broadcom specific */
 113#define MDIO_AUX_CTRL_STATUS_REG           0x18
 114#define MDIO_BC_FULL_DUPLEX_IND             0x1
 115#define MDIO_BC_SPEED                       0x2
 116
 117/* TDK specific */
 118#define MDIO_TDK_DIAGNOSTIC_REG              18
 119#define MDIO_TDK_DIAGNOSTIC_RATE          0x400
 120#define MDIO_TDK_DIAGNOSTIC_DPLX          0x800
 121
 122/*Intel LXT972A specific*/
 123#define MDIO_INT_STATUS_REG_2                   0x0011
 124#define MDIO_INT_FULL_DUPLEX_IND       (1 << 9)
 125#define MDIO_INT_SPEED                (1 << 14)
 126
 127/* Network flash constants */
 128#define NET_FLASH_TIME                  (HZ/50) /* 20 ms */
 129#define NET_FLASH_PAUSE                (HZ/100) /* 10 ms */
 130#define NET_LINK_UP_CHECK_INTERVAL       (2*HZ) /* 2 s   */
 131#define NET_DUPLEX_CHECK_INTERVAL        (2*HZ) /* 2 s   */
 132
 133#define NO_NETWORK_ACTIVITY 0
 134#define NETWORK_ACTIVITY    1
 135
 136#define NBR_OF_RX_DESC     32
 137#define NBR_OF_TX_DESC     16
 138
 139/* Large packets are sent directly to upper layers while small packets are */
 140/* copied (to reduce memory waste). The following constant decides the breakpoint */
 141#define RX_COPYBREAK 256
 142
 143/* Due to a chip bug we need to flush the cache when descriptors are returned */
 144/* to the DMA. To decrease performance impact we return descriptors in chunks. */
 145/* The following constant determines the number of descriptors to return. */
 146#define RX_QUEUE_THRESHOLD  NBR_OF_RX_DESC/2
 147
 148#define GET_BIT(bit,val)   (((val) >> (bit)) & 0x01)
 149
 150/* Define some macros to access ETRAX 100 registers */
 151#define SETF(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
 152                                          IO_FIELD_(reg##_, field##_, val)
 153#define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
 154                                          IO_STATE_(reg##_, field##_, _##val)
 155
 156static etrax_eth_descr *myNextRxDesc;  /* Points to the next descriptor to
 157                                          to be processed */
 158static etrax_eth_descr *myLastRxDesc;  /* The last processed descriptor */
 159
 160static etrax_eth_descr RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned(32)));
 161
 162static etrax_eth_descr* myFirstTxDesc; /* First packet not yet sent */
 163static etrax_eth_descr* myLastTxDesc;  /* End of send queue */
 164static etrax_eth_descr* myNextTxDesc;  /* Next descriptor to use */
 165static etrax_eth_descr TxDescList[NBR_OF_TX_DESC] __attribute__ ((aligned(32)));
 166
 167static unsigned int network_rec_config_shadow = 0;
 168
 169static unsigned int network_tr_ctrl_shadow = 0;
 170
 171/* Network speed indication. */
 172static DEFINE_TIMER(speed_timer, NULL, 0, 0);
 173static DEFINE_TIMER(clear_led_timer, NULL, 0, 0);
 174static int current_speed; /* Speed read from transceiver */
 175static int current_speed_selection; /* Speed selected by user */
 176static unsigned long led_next_time;
 177static int led_active;
 178static int rx_queue_len;
 179
 180/* Duplex */
 181static DEFINE_TIMER(duplex_timer, NULL, 0, 0);
 182static int full_duplex;
 183static enum duplex current_duplex;
 184
 185/* Index to functions, as function prototypes. */
 186
 187static int etrax_ethernet_init(void);
 188
 189static int e100_open(struct net_device *dev);
 190static int e100_set_mac_address(struct net_device *dev, void *addr);
 191static int e100_send_packet(struct sk_buff *skb, struct net_device *dev);
 192static irqreturn_t e100rxtx_interrupt(int irq, void *dev_id);
 193static irqreturn_t e100nw_interrupt(int irq, void *dev_id);
 194static void e100_rx(struct net_device *dev);
 195static int e100_close(struct net_device *dev);
 196static int e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
 197static int e100_set_config(struct net_device* dev, struct ifmap* map);
 198static void e100_tx_timeout(struct net_device *dev);
 199static struct net_device_stats *e100_get_stats(struct net_device *dev);
 200static void set_multicast_list(struct net_device *dev);
 201static void e100_hardware_send_packet(struct net_local* np, char *buf, int length);
 202static void update_rx_stats(struct net_device_stats *);
 203static void update_tx_stats(struct net_device_stats *);
 204static int e100_probe_transceiver(struct net_device* dev);
 205
 206static void e100_check_speed(unsigned long priv);
 207static void e100_set_speed(struct net_device* dev, unsigned long speed);
 208static void e100_check_duplex(unsigned long priv);
 209static void e100_set_duplex(struct net_device* dev, enum duplex);
 210static void e100_negotiate(struct net_device* dev);
 211
 212static int e100_get_mdio_reg(struct net_device *dev, int phy_id, int location);
 213static void e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value);
 214
 215static void e100_send_mdio_cmd(unsigned short cmd, int write_cmd);
 216static void e100_send_mdio_bit(unsigned char bit);
 217static unsigned char e100_receive_mdio_bit(void);
 218static void e100_reset_transceiver(struct net_device* net);
 219
 220static void e100_clear_network_leds(unsigned long dummy);
 221static void e100_set_network_leds(int active);
 222
 223static const struct ethtool_ops e100_ethtool_ops;
 224#if defined(CONFIG_ETRAX_NO_PHY)
 225static void dummy_check_speed(struct net_device* dev);
 226static void dummy_check_duplex(struct net_device* dev);
 227#else
 228static void broadcom_check_speed(struct net_device* dev);
 229static void broadcom_check_duplex(struct net_device* dev);
 230static void tdk_check_speed(struct net_device* dev);
 231static void tdk_check_duplex(struct net_device* dev);
 232static void intel_check_speed(struct net_device* dev);
 233static void intel_check_duplex(struct net_device* dev);
 234static void generic_check_speed(struct net_device* dev);
 235static void generic_check_duplex(struct net_device* dev);
 236#endif
 237#ifdef CONFIG_NET_POLL_CONTROLLER
 238static void e100_netpoll(struct net_device* dev);
 239#endif
 240
 241static int autoneg_normal = 1;
 242
 243struct transceiver_ops transceivers[] =
 244{
 245#if defined(CONFIG_ETRAX_NO_PHY)
 246        {0x0000, dummy_check_speed, dummy_check_duplex}        /* Dummy */
 247#else
 248        {0x1018, broadcom_check_speed, broadcom_check_duplex},  /* Broadcom */
 249        {0xC039, tdk_check_speed, tdk_check_duplex},            /* TDK 2120 */
 250        {0x039C, tdk_check_speed, tdk_check_duplex},            /* TDK 2120C */
 251        {0x04de, intel_check_speed, intel_check_duplex},        /* Intel LXT972A*/
 252        {0x0000, generic_check_speed, generic_check_duplex}     /* Generic, must be last */
 253#endif
 254};
 255
 256struct transceiver_ops* transceiver = &transceivers[0];
 257
 258static const struct net_device_ops e100_netdev_ops = {
 259        .ndo_open               = e100_open,
 260        .ndo_stop               = e100_close,
 261        .ndo_start_xmit         = e100_send_packet,
 262        .ndo_tx_timeout         = e100_tx_timeout,
 263        .ndo_get_stats          = e100_get_stats,
 264        .ndo_set_rx_mode        = set_multicast_list,
 265        .ndo_do_ioctl           = e100_ioctl,
 266        .ndo_set_mac_address    = e100_set_mac_address,
 267        .ndo_validate_addr      = eth_validate_addr,
 268        .ndo_change_mtu         = eth_change_mtu,
 269        .ndo_set_config         = e100_set_config,
 270#ifdef CONFIG_NET_POLL_CONTROLLER
 271        .ndo_poll_controller    = e100_netpoll,
 272#endif
 273};
 274
 275#define tx_done(dev) (*R_DMA_CH0_CMD == 0)
 276
 277/*
 278 * Check for a network adaptor of this type, and return '0' if one exists.
 279 * If dev->base_addr == 0, probe all likely locations.
 280 * If dev->base_addr == 1, always return failure.
 281 * If dev->base_addr == 2, allocate space for the device and return success
 282 * (detachable devices only).
 283 */
 284
 285static int __init
 286etrax_ethernet_init(void)
 287{
 288        struct net_device *dev;
 289        struct net_local* np;
 290        int i, err;
 291
 292        printk(KERN_INFO
 293               "ETRAX 100LX 10/100MBit ethernet v2.0 (c) 1998-2007 Axis Communications AB\n");
 294
 295        if (cris_request_io_interface(if_eth, cardname)) {
 296                printk(KERN_CRIT "etrax_ethernet_init failed to get IO interface\n");
 297                return -EBUSY;
 298        }
 299
 300        dev = alloc_etherdev(sizeof(struct net_local));
 301        if (!dev)
 302                return -ENOMEM;
 303
 304        np = netdev_priv(dev);
 305
 306        /* we do our own locking */
 307        dev->features |= NETIF_F_LLTX;
 308
 309        dev->base_addr = (unsigned int)R_NETWORK_SA_0; /* just to have something to show */
 310
 311        /* now setup our etrax specific stuff */
 312
 313        dev->irq = NETWORK_DMA_RX_IRQ_NBR; /* we really use DMATX as well... */
 314        dev->dma = NETWORK_RX_DMA_NBR;
 315
 316        /* fill in our handlers so the network layer can talk to us in the future */
 317
 318        dev->ethtool_ops        = &e100_ethtool_ops;
 319        dev->netdev_ops         = &e100_netdev_ops;
 320
 321        spin_lock_init(&np->lock);
 322        spin_lock_init(&np->led_lock);
 323        spin_lock_init(&np->transceiver_lock);
 324
 325        /* Initialise the list of Etrax DMA-descriptors */
 326
 327        /* Initialise receive descriptors */
 328
 329        for (i = 0; i < NBR_OF_RX_DESC; i++) {
 330                /* Allocate two extra cachelines to make sure that buffer used
 331                 * by DMA does not share cacheline with any other data (to
 332                 * avoid cache bug)
 333                 */
 334                RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
 335                if (!RxDescList[i].skb)
 336                        return -ENOMEM;
 337                RxDescList[i].descr.ctrl   = 0;
 338                RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE;
 339                RxDescList[i].descr.next   = virt_to_phys(&RxDescList[i + 1]);
 340                RxDescList[i].descr.buf    = L1_CACHE_ALIGN(virt_to_phys(RxDescList[i].skb->data));
 341                RxDescList[i].descr.status = 0;
 342                RxDescList[i].descr.hw_len = 0;
 343                prepare_rx_descriptor(&RxDescList[i].descr);
 344        }
 345
 346        RxDescList[NBR_OF_RX_DESC - 1].descr.ctrl   = d_eol;
 347        RxDescList[NBR_OF_RX_DESC - 1].descr.next   = virt_to_phys(&RxDescList[0]);
 348        rx_queue_len = 0;
 349
 350        /* Initialize transmit descriptors */
 351        for (i = 0; i < NBR_OF_TX_DESC; i++) {
 352                TxDescList[i].descr.ctrl   = 0;
 353                TxDescList[i].descr.sw_len = 0;
 354                TxDescList[i].descr.next   = virt_to_phys(&TxDescList[i + 1].descr);
 355                TxDescList[i].descr.buf    = 0;
 356                TxDescList[i].descr.status = 0;
 357                TxDescList[i].descr.hw_len = 0;
 358                TxDescList[i].skb = 0;
 359        }
 360
 361        TxDescList[NBR_OF_TX_DESC - 1].descr.ctrl   = d_eol;
 362        TxDescList[NBR_OF_TX_DESC - 1].descr.next   = virt_to_phys(&TxDescList[0].descr);
 363
 364        /* Initialise initial pointers */
 365
 366        myNextRxDesc  = &RxDescList[0];
 367        myLastRxDesc  = &RxDescList[NBR_OF_RX_DESC - 1];
 368        myFirstTxDesc = &TxDescList[0];
 369        myNextTxDesc  = &TxDescList[0];
 370        myLastTxDesc  = &TxDescList[NBR_OF_TX_DESC - 1];
 371
 372        /* Register device */
 373        err = register_netdev(dev);
 374        if (err) {
 375                free_netdev(dev);
 376                return err;
 377        }
 378
 379        /* set the default MAC address */
 380
 381        e100_set_mac_address(dev, &default_mac);
 382
 383        /* Initialize speed indicator stuff. */
 384
 385        current_speed = 10;
 386        current_speed_selection = 0; /* Auto */
 387        speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
 388        speed_timer.data = (unsigned long)dev;
 389        speed_timer.function = e100_check_speed;
 390
 391        clear_led_timer.function = e100_clear_network_leds;
 392        clear_led_timer.data = (unsigned long)dev;
 393
 394        full_duplex = 0;
 395        current_duplex = autoneg;
 396        duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
 397        duplex_timer.data = (unsigned long)dev;
 398        duplex_timer.function = e100_check_duplex;
 399
 400        /* Initialize mii interface */
 401        np->mii_if.phy_id_mask = 0x1f;
 402        np->mii_if.reg_num_mask = 0x1f;
 403        np->mii_if.dev = dev;
 404        np->mii_if.mdio_read = e100_get_mdio_reg;
 405        np->mii_if.mdio_write = e100_set_mdio_reg;
 406
 407        /* Initialize group address registers to make sure that no */
 408        /* unwanted addresses are matched */
 409        *R_NETWORK_GA_0 = 0x00000000;
 410        *R_NETWORK_GA_1 = 0x00000000;
 411
 412        /* Initialize next time the led can flash */
 413        led_next_time = jiffies;
 414        return 0;
 415}
 416
 417/* set MAC address of the interface. called from the core after a
 418 * SIOCSIFADDR ioctl, and from the bootup above.
 419 */
 420
 421static int
 422e100_set_mac_address(struct net_device *dev, void *p)
 423{
 424        struct net_local *np = netdev_priv(dev);
 425        struct sockaddr *addr = p;
 426
 427        spin_lock(&np->lock); /* preemption protection */
 428
 429        /* remember it */
 430
 431        memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 432
 433        /* Write it to the hardware.
 434         * Note the way the address is wrapped:
 435         * *R_NETWORK_SA_0 = a0_0 | (a0_1 << 8) | (a0_2 << 16) | (a0_3 << 24);
 436         * *R_NETWORK_SA_1 = a0_4 | (a0_5 << 8);
 437         */
 438
 439        *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
 440                (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
 441        *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
 442        *R_NETWORK_SA_2 = 0;
 443
 444        /* show it in the log as well */
 445
 446        printk(KERN_INFO "%s: changed MAC to %pM\n", dev->name, dev->dev_addr);
 447
 448        spin_unlock(&np->lock);
 449
 450        return 0;
 451}
 452
 453/*
 454 * Open/initialize the board. This is called (in the current kernel)
 455 * sometime after booting when the 'ifconfig' program is run.
 456 *
 457 * This routine should set everything up anew at each open, even
 458 * registers that "should" only need to be set once at boot, so that
 459 * there is non-reboot way to recover if something goes wrong.
 460 */
 461
 462static int
 463e100_open(struct net_device *dev)
 464{
 465        unsigned long flags;
 466
 467        /* enable the MDIO output pin */
 468
 469        *R_NETWORK_MGM_CTRL = IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable);
 470
 471        *R_IRQ_MASK0_CLR =
 472                IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
 473                IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
 474                IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
 475
 476        /* clear dma0 and 1 eop and descr irq masks */
 477        *R_IRQ_MASK2_CLR =
 478                IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
 479                IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
 480                IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
 481                IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
 482
 483        /* Reset and wait for the DMA channels */
 484
 485        RESET_DMA(NETWORK_TX_DMA_NBR);
 486        RESET_DMA(NETWORK_RX_DMA_NBR);
 487        WAIT_DMA(NETWORK_TX_DMA_NBR);
 488        WAIT_DMA(NETWORK_RX_DMA_NBR);
 489
 490        /* Initialise the etrax network controller */
 491
 492        /* allocate the irq corresponding to the receiving DMA */
 493
 494        if (request_irq(NETWORK_DMA_RX_IRQ_NBR, e100rxtx_interrupt, 0, cardname,
 495                        (void *)dev)) {
 496                goto grace_exit0;
 497        }
 498
 499        /* allocate the irq corresponding to the transmitting DMA */
 500
 501        if (request_irq(NETWORK_DMA_TX_IRQ_NBR, e100rxtx_interrupt, 0,
 502                        cardname, (void *)dev)) {
 503                goto grace_exit1;
 504        }
 505
 506        /* allocate the irq corresponding to the network errors etc */
 507
 508        if (request_irq(NETWORK_STATUS_IRQ_NBR, e100nw_interrupt, 0,
 509                        cardname, (void *)dev)) {
 510                goto grace_exit2;
 511        }
 512
 513        /*
 514         * Always allocate the DMA channels after the IRQ,
 515         * and clean up on failure.
 516         */
 517
 518        if (cris_request_dma(NETWORK_TX_DMA_NBR,
 519                             cardname,
 520                             DMA_VERBOSE_ON_ERROR,
 521                             dma_eth)) {
 522                goto grace_exit3;
 523        }
 524
 525        if (cris_request_dma(NETWORK_RX_DMA_NBR,
 526                             cardname,
 527                             DMA_VERBOSE_ON_ERROR,
 528                             dma_eth)) {
 529                goto grace_exit4;
 530        }
 531
 532        /* give the HW an idea of what MAC address we want */
 533
 534        *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
 535                (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
 536        *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
 537        *R_NETWORK_SA_2 = 0;
 538
 539#if 0
 540        /* use promiscuous mode for testing */
 541        *R_NETWORK_GA_0 = 0xffffffff;
 542        *R_NETWORK_GA_1 = 0xffffffff;
 543
 544        *R_NETWORK_REC_CONFIG = 0xd; /* broadcast rec, individ. rec, ma0 enabled */
 545#else
 546        SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, max_size, size1522);
 547        SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, broadcast, receive);
 548        SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, ma0, enable);
 549        SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
 550        *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
 551#endif
 552
 553        *R_NETWORK_GEN_CONFIG =
 554                IO_STATE(R_NETWORK_GEN_CONFIG, phy,    mii_clk) |
 555                IO_STATE(R_NETWORK_GEN_CONFIG, enable, on);
 556
 557        SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
 558        SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, delay, none);
 559        SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cancel, dont);
 560        SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cd, enable);
 561        SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, retry, enable);
 562        SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, pad, enable);
 563        SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, crc, enable);
 564        *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
 565
 566        local_irq_save(flags);
 567
 568        /* enable the irq's for ethernet DMA */
 569
 570        *R_IRQ_MASK2_SET =
 571                IO_STATE(R_IRQ_MASK2_SET, dma0_eop, set) |
 572                IO_STATE(R_IRQ_MASK2_SET, dma1_eop, set);
 573
 574        *R_IRQ_MASK0_SET =
 575                IO_STATE(R_IRQ_MASK0_SET, overrun,       set) |
 576                IO_STATE(R_IRQ_MASK0_SET, underrun,      set) |
 577                IO_STATE(R_IRQ_MASK0_SET, excessive_col, set);
 578
 579        /* make sure the irqs are cleared */
 580
 581        *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
 582        *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
 583
 584        /* make sure the rec and transmit error counters are cleared */
 585
 586        (void)*R_REC_COUNTERS;  /* dummy read */
 587        (void)*R_TR_COUNTERS;   /* dummy read */
 588
 589        /* start the receiving DMA channel so we can receive packets from now on */
 590
 591        *R_DMA_CH1_FIRST = virt_to_phys(myNextRxDesc);
 592        *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, start);
 593
 594        /* Set up transmit DMA channel so it can be restarted later */
 595
 596        *R_DMA_CH0_FIRST = 0;
 597        *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
 598        netif_start_queue(dev);
 599
 600        local_irq_restore(flags);
 601
 602        /* Probe for transceiver */
 603        if (e100_probe_transceiver(dev))
 604                goto grace_exit5;
 605
 606        /* Start duplex/speed timers */
 607        add_timer(&speed_timer);
 608        add_timer(&duplex_timer);
 609
 610        /* We are now ready to accept transmit requeusts from
 611         * the queueing layer of the networking.
 612         */
 613        netif_carrier_on(dev);
 614
 615        return 0;
 616
 617grace_exit5:
 618        cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
 619grace_exit4:
 620        cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
 621grace_exit3:
 622        free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
 623grace_exit2:
 624        free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
 625grace_exit1:
 626        free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
 627grace_exit0:
 628        return -EAGAIN;
 629}
 630
 631#if defined(CONFIG_ETRAX_NO_PHY)
 632static void
 633dummy_check_speed(struct net_device* dev)
 634{
 635        current_speed = 100;
 636}
 637#else
 638static void
 639generic_check_speed(struct net_device* dev)
 640{
 641        unsigned long data;
 642        struct net_local *np = netdev_priv(dev);
 643
 644        data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
 645        if ((data & ADVERTISE_100FULL) ||
 646            (data & ADVERTISE_100HALF))
 647                current_speed = 100;
 648        else
 649                current_speed = 10;
 650}
 651
 652static void
 653tdk_check_speed(struct net_device* dev)
 654{
 655        unsigned long data;
 656        struct net_local *np = netdev_priv(dev);
 657
 658        data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
 659                                 MDIO_TDK_DIAGNOSTIC_REG);
 660        current_speed = (data & MDIO_TDK_DIAGNOSTIC_RATE ? 100 : 10);
 661}
 662
 663static void
 664broadcom_check_speed(struct net_device* dev)
 665{
 666        unsigned long data;
 667        struct net_local *np = netdev_priv(dev);
 668
 669        data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
 670                                 MDIO_AUX_CTRL_STATUS_REG);
 671        current_speed = (data & MDIO_BC_SPEED ? 100 : 10);
 672}
 673
 674static void
 675intel_check_speed(struct net_device* dev)
 676{
 677        unsigned long data;
 678        struct net_local *np = netdev_priv(dev);
 679
 680        data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
 681                                 MDIO_INT_STATUS_REG_2);
 682        current_speed = (data & MDIO_INT_SPEED ? 100 : 10);
 683}
 684#endif
 685static void
 686e100_check_speed(unsigned long priv)
 687{
 688        struct net_device* dev = (struct net_device*)priv;
 689        struct net_local *np = netdev_priv(dev);
 690        static int led_initiated = 0;
 691        unsigned long data;
 692        int old_speed = current_speed;
 693
 694        spin_lock(&np->transceiver_lock);
 695
 696        data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMSR);
 697        if (!(data & BMSR_LSTATUS)) {
 698                current_speed = 0;
 699        } else {
 700                transceiver->check_speed(dev);
 701        }
 702
 703        spin_lock(&np->led_lock);
 704        if ((old_speed != current_speed) || !led_initiated) {
 705                led_initiated = 1;
 706                e100_set_network_leds(NO_NETWORK_ACTIVITY);
 707                if (current_speed)
 708                        netif_carrier_on(dev);
 709                else
 710                        netif_carrier_off(dev);
 711        }
 712        spin_unlock(&np->led_lock);
 713
 714        /* Reinitialize the timer. */
 715        speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
 716        add_timer(&speed_timer);
 717
 718        spin_unlock(&np->transceiver_lock);
 719}
 720
 721static void
 722e100_negotiate(struct net_device* dev)
 723{
 724        struct net_local *np = netdev_priv(dev);
 725        unsigned short data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
 726                                                MII_ADVERTISE);
 727
 728        /* Discard old speed and duplex settings */
 729        data &= ~(ADVERTISE_100HALF | ADVERTISE_100FULL |
 730                  ADVERTISE_10HALF | ADVERTISE_10FULL);
 731
 732        switch (current_speed_selection) {
 733                case 10:
 734                        if (current_duplex == full)
 735                                data |= ADVERTISE_10FULL;
 736                        else if (current_duplex == half)
 737                                data |= ADVERTISE_10HALF;
 738                        else
 739                                data |= ADVERTISE_10HALF | ADVERTISE_10FULL;
 740                        break;
 741
 742                case 100:
 743                         if (current_duplex == full)
 744                                data |= ADVERTISE_100FULL;
 745                        else if (current_duplex == half)
 746                                data |= ADVERTISE_100HALF;
 747                        else
 748                                data |= ADVERTISE_100HALF | ADVERTISE_100FULL;
 749                        break;
 750
 751                case 0: /* Auto */
 752                         if (current_duplex == full)
 753                                data |= ADVERTISE_100FULL | ADVERTISE_10FULL;
 754                        else if (current_duplex == half)
 755                                data |= ADVERTISE_100HALF | ADVERTISE_10HALF;
 756                        else
 757                                data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
 758                                  ADVERTISE_100HALF | ADVERTISE_100FULL;
 759                        break;
 760
 761                default: /* assume autoneg speed and duplex */
 762                        data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
 763                                  ADVERTISE_100HALF | ADVERTISE_100FULL;
 764                        break;
 765        }
 766
 767        e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE, data);
 768
 769        data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
 770        if (autoneg_normal) {
 771                /* Renegotiate with link partner */
 772                data |= BMCR_ANENABLE | BMCR_ANRESTART;
 773        } else {
 774                /* Don't negotiate speed or duplex */
 775                data &= ~(BMCR_ANENABLE | BMCR_ANRESTART);
 776
 777                /* Set speed and duplex static */
 778                if (current_speed_selection == 10)
 779                        data &= ~BMCR_SPEED100;
 780                else
 781                        data |= BMCR_SPEED100;
 782
 783                if (current_duplex != full)
 784                        data &= ~BMCR_FULLDPLX;
 785                else
 786                        data |= BMCR_FULLDPLX;
 787        }
 788        e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR, data);
 789}
 790
 791static void
 792e100_set_speed(struct net_device* dev, unsigned long speed)
 793{
 794        struct net_local *np = netdev_priv(dev);
 795
 796        spin_lock(&np->transceiver_lock);
 797        if (speed != current_speed_selection) {
 798                current_speed_selection = speed;
 799                e100_negotiate(dev);
 800        }
 801        spin_unlock(&np->transceiver_lock);
 802}
 803
 804static void
 805e100_check_duplex(unsigned long priv)
 806{
 807        struct net_device *dev = (struct net_device *)priv;
 808        struct net_local *np = netdev_priv(dev);
 809        int old_duplex;
 810
 811        spin_lock(&np->transceiver_lock);
 812        old_duplex = full_duplex;
 813        transceiver->check_duplex(dev);
 814        if (old_duplex != full_duplex) {
 815                /* Duplex changed */
 816                SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
 817                *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
 818        }
 819
 820        /* Reinitialize the timer. */
 821        duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
 822        add_timer(&duplex_timer);
 823        np->mii_if.full_duplex = full_duplex;
 824        spin_unlock(&np->transceiver_lock);
 825}
 826#if defined(CONFIG_ETRAX_NO_PHY)
 827static void
 828dummy_check_duplex(struct net_device* dev)
 829{
 830        full_duplex = 1;
 831}
 832#else
 833static void
 834generic_check_duplex(struct net_device* dev)
 835{
 836        unsigned long data;
 837        struct net_local *np = netdev_priv(dev);
 838
 839        data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
 840        if ((data & ADVERTISE_10FULL) ||
 841            (data & ADVERTISE_100FULL))
 842                full_duplex = 1;
 843        else
 844                full_duplex = 0;
 845}
 846
 847static void
 848tdk_check_duplex(struct net_device* dev)
 849{
 850        unsigned long data;
 851        struct net_local *np = netdev_priv(dev);
 852
 853        data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
 854                                 MDIO_TDK_DIAGNOSTIC_REG);
 855        full_duplex = (data & MDIO_TDK_DIAGNOSTIC_DPLX) ? 1 : 0;
 856}
 857
 858static void
 859broadcom_check_duplex(struct net_device* dev)
 860{
 861        unsigned long data;
 862        struct net_local *np = netdev_priv(dev);
 863
 864        data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
 865                                 MDIO_AUX_CTRL_STATUS_REG);
 866        full_duplex = (data & MDIO_BC_FULL_DUPLEX_IND) ? 1 : 0;
 867}
 868
 869static void
 870intel_check_duplex(struct net_device* dev)
 871{
 872        unsigned long data;
 873        struct net_local *np = netdev_priv(dev);
 874
 875        data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
 876                                 MDIO_INT_STATUS_REG_2);
 877        full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0;
 878}
 879#endif
 880static void
 881e100_set_duplex(struct net_device* dev, enum duplex new_duplex)
 882{
 883        struct net_local *np = netdev_priv(dev);
 884
 885        spin_lock(&np->transceiver_lock);
 886        if (new_duplex != current_duplex) {
 887                current_duplex = new_duplex;
 888                e100_negotiate(dev);
 889        }
 890        spin_unlock(&np->transceiver_lock);
 891}
 892
 893static int
 894e100_probe_transceiver(struct net_device* dev)
 895{
 896        int ret = 0;
 897
 898#if !defined(CONFIG_ETRAX_NO_PHY)
 899        unsigned int phyid_high;
 900        unsigned int phyid_low;
 901        unsigned int oui;
 902        struct transceiver_ops* ops = NULL;
 903        struct net_local *np = netdev_priv(dev);
 904
 905        spin_lock(&np->transceiver_lock);
 906
 907        /* Probe MDIO physical address */
 908        for (np->mii_if.phy_id = 0; np->mii_if.phy_id <= 31;
 909             np->mii_if.phy_id++) {
 910                if (e100_get_mdio_reg(dev,
 911                                      np->mii_if.phy_id, MII_BMSR) != 0xffff)
 912                        break;
 913        }
 914        if (np->mii_if.phy_id == 32) {
 915                ret = -ENODEV;
 916                goto out;
 917        }
 918
 919        /* Get manufacturer */
 920        phyid_high = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID1);
 921        phyid_low = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID2);
 922        oui = (phyid_high << 6) | (phyid_low >> 10);
 923
 924        for (ops = &transceivers[0]; ops->oui; ops++) {
 925                if (ops->oui == oui)
 926                        break;
 927        }
 928        transceiver = ops;
 929out:
 930        spin_unlock(&np->transceiver_lock);
 931#endif
 932        return ret;
 933}
 934
 935static int
 936e100_get_mdio_reg(struct net_device *dev, int phy_id, int location)
 937{
 938        unsigned short cmd;    /* Data to be sent on MDIO port */
 939        int data;   /* Data read from MDIO */
 940        int bitCounter;
 941
 942        /* Start of frame, OP Code, Physical Address, Register Address */
 943        cmd = (MDIO_START << 14) | (MDIO_READ << 12) | (phy_id << 7) |
 944                (location << 2);
 945
 946        e100_send_mdio_cmd(cmd, 0);
 947
 948        data = 0;
 949
 950        /* Data... */
 951        for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
 952                data |= (e100_receive_mdio_bit() << bitCounter);
 953        }
 954
 955        return data;
 956}
 957
 958static void
 959e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value)
 960{
 961        int bitCounter;
 962        unsigned short cmd;
 963
 964        cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (phy_id << 7) |
 965              (location << 2);
 966
 967        e100_send_mdio_cmd(cmd, 1);
 968
 969        /* Data... */
 970        for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
 971                e100_send_mdio_bit(GET_BIT(bitCounter, value));
 972        }
 973
 974}
 975
 976static void
 977e100_send_mdio_cmd(unsigned short cmd, int write_cmd)
 978{
 979        int bitCounter;
 980        unsigned char data = 0x2;
 981
 982        /* Preamble */
 983        for (bitCounter = 31; bitCounter>= 0; bitCounter--)
 984                e100_send_mdio_bit(GET_BIT(bitCounter, MDIO_PREAMBLE));
 985
 986        for (bitCounter = 15; bitCounter >= 2; bitCounter--)
 987                e100_send_mdio_bit(GET_BIT(bitCounter, cmd));
 988
 989        /* Turnaround */
 990        for (bitCounter = 1; bitCounter >= 0 ; bitCounter--)
 991                if (write_cmd)
 992                        e100_send_mdio_bit(GET_BIT(bitCounter, data));
 993                else
 994                        e100_receive_mdio_bit();
 995}
 996
 997static void
 998e100_send_mdio_bit(unsigned char bit)
 999{
1000        *R_NETWORK_MGM_CTRL =
1001                IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
1002                IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
1003        udelay(1);
1004        *R_NETWORK_MGM_CTRL =
1005                IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
1006                IO_MASK(R_NETWORK_MGM_CTRL, mdck) |
1007                IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
1008        udelay(1);
1009}
1010
1011static unsigned char
1012e100_receive_mdio_bit()
1013{
1014        unsigned char bit;
1015        *R_NETWORK_MGM_CTRL = 0;
1016        bit = IO_EXTRACT(R_NETWORK_STAT, mdio, *R_NETWORK_STAT);
1017        udelay(1);
1018        *R_NETWORK_MGM_CTRL = IO_MASK(R_NETWORK_MGM_CTRL, mdck);
1019        udelay(1);
1020        return bit;
1021}
1022
1023static void
1024e100_reset_transceiver(struct net_device* dev)
1025{
1026        struct net_local *np = netdev_priv(dev);
1027        unsigned short cmd;
1028        unsigned short data;
1029        int bitCounter;
1030
1031        data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
1032
1033        cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (np->mii_if.phy_id << 7) | (MII_BMCR << 2);
1034
1035        e100_send_mdio_cmd(cmd, 1);
1036
1037        data |= 0x8000;
1038
1039        for (bitCounter = 15; bitCounter >= 0 ; bitCounter--) {
1040                e100_send_mdio_bit(GET_BIT(bitCounter, data));
1041        }
1042}
1043
1044/* Called by upper layers if they decide it took too long to complete
1045 * sending a packet - we need to reset and stuff.
1046 */
1047
1048static void
1049e100_tx_timeout(struct net_device *dev)
1050{
1051        struct net_local *np = netdev_priv(dev);
1052        unsigned long flags;
1053
1054        spin_lock_irqsave(&np->lock, flags);
1055
1056        printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
1057               tx_done(dev) ? "IRQ problem" : "network cable problem");
1058
1059        /* remember we got an error */
1060
1061        dev->stats.tx_errors++;
1062
1063        /* reset the TX DMA in case it has hung on something */
1064
1065        RESET_DMA(NETWORK_TX_DMA_NBR);
1066        WAIT_DMA(NETWORK_TX_DMA_NBR);
1067
1068        /* Reset the transceiver. */
1069
1070        e100_reset_transceiver(dev);
1071
1072        /* and get rid of the packets that never got an interrupt */
1073        while (myFirstTxDesc != myNextTxDesc) {
1074                dev_kfree_skb(myFirstTxDesc->skb);
1075                myFirstTxDesc->skb = 0;
1076                myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
1077        }
1078
1079        /* Set up transmit DMA channel so it can be restarted later */
1080        *R_DMA_CH0_FIRST = 0;
1081        *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
1082
1083        /* tell the upper layers we're ok again */
1084
1085        netif_wake_queue(dev);
1086        spin_unlock_irqrestore(&np->lock, flags);
1087}
1088
1089
1090/* This will only be invoked if the driver is _not_ in XOFF state.
1091 * What this means is that we need not check it, and that this
1092 * invariant will hold if we make sure that the netif_*_queue()
1093 * calls are done at the proper times.
1094 */
1095
1096static int
1097e100_send_packet(struct sk_buff *skb, struct net_device *dev)
1098{
1099        struct net_local *np = netdev_priv(dev);
1100        unsigned char *buf = skb->data;
1101        unsigned long flags;
1102
1103#ifdef ETHDEBUG
1104        printk("send packet len %d\n", length);
1105#endif
1106        spin_lock_irqsave(&np->lock, flags);  /* protect from tx_interrupt and ourself */
1107
1108        myNextTxDesc->skb = skb;
1109
1110        dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1111
1112        e100_hardware_send_packet(np, buf, skb->len);
1113
1114        myNextTxDesc = phys_to_virt(myNextTxDesc->descr.next);
1115
1116        /* Stop queue if full */
1117        if (myNextTxDesc == myFirstTxDesc) {
1118                netif_stop_queue(dev);
1119        }
1120
1121        spin_unlock_irqrestore(&np->lock, flags);
1122
1123        return NETDEV_TX_OK;
1124}
1125
1126/*
1127 * The typical workload of the driver:
1128 *   Handle the network interface interrupts.
1129 */
1130
1131static irqreturn_t
1132e100rxtx_interrupt(int irq, void *dev_id)
1133{
1134        struct net_device *dev = (struct net_device *)dev_id;
1135        struct net_local *np = netdev_priv(dev);
1136        unsigned long irqbits;
1137
1138        /*
1139         * Note that both rx and tx interrupts are blocked at this point,
1140         * regardless of which got us here.
1141         */
1142
1143        irqbits = *R_IRQ_MASK2_RD;
1144
1145        /* Handle received packets */
1146        if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma1_eop, active)) {
1147                /* acknowledge the eop interrupt */
1148
1149                *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
1150
1151                /* check if one or more complete packets were indeed received */
1152
1153                while ((*R_DMA_CH1_FIRST != virt_to_phys(myNextRxDesc)) &&
1154                       (myNextRxDesc != myLastRxDesc)) {
1155                        /* Take out the buffer and give it to the OS, then
1156                         * allocate a new buffer to put a packet in.
1157                         */
1158                        e100_rx(dev);
1159                        dev->stats.rx_packets++;
1160                        /* restart/continue on the channel, for safety */
1161                        *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, restart);
1162                        /* clear dma channel 1 eop/descr irq bits */
1163                        *R_DMA_CH1_CLR_INTR =
1164                                IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do) |
1165                                IO_STATE(R_DMA_CH1_CLR_INTR, clr_descr, do);
1166
1167                        /* now, we might have gotten another packet
1168                           so we have to loop back and check if so */
1169                }
1170        }
1171
1172        /* Report any packets that have been sent */
1173        while (virt_to_phys(myFirstTxDesc) != *R_DMA_CH0_FIRST &&
1174               (netif_queue_stopped(dev) || myFirstTxDesc != myNextTxDesc)) {
1175                dev->stats.tx_bytes += myFirstTxDesc->skb->len;
1176                dev->stats.tx_packets++;
1177
1178                /* dma is ready with the transmission of the data in tx_skb, so now
1179                   we can release the skb memory */
1180                dev_kfree_skb_irq(myFirstTxDesc->skb);
1181                myFirstTxDesc->skb = 0;
1182                myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
1183                /* Wake up queue. */
1184                netif_wake_queue(dev);
1185        }
1186
1187        if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma0_eop, active)) {
1188                /* acknowledge the eop interrupt. */
1189                *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
1190        }
1191
1192        return IRQ_HANDLED;
1193}
1194
1195static irqreturn_t
1196e100nw_interrupt(int irq, void *dev_id)
1197{
1198        struct net_device *dev = (struct net_device *)dev_id;
1199        unsigned long irqbits = *R_IRQ_MASK0_RD;
1200
1201        /* check for underrun irq */
1202        if (irqbits & IO_STATE(R_IRQ_MASK0_RD, underrun, active)) {
1203                SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
1204                *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
1205                SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
1206                dev->stats.tx_errors++;
1207                D(printk("ethernet receiver underrun!\n"));
1208        }
1209
1210        /* check for overrun irq */
1211        if (irqbits & IO_STATE(R_IRQ_MASK0_RD, overrun, active)) {
1212                update_rx_stats(&dev->stats); /* this will ack the irq */
1213                D(printk("ethernet receiver overrun!\n"));
1214        }
1215        /* check for excessive collision irq */
1216        if (irqbits & IO_STATE(R_IRQ_MASK0_RD, excessive_col, active)) {
1217                SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
1218                *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
1219                SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
1220                dev->stats.tx_errors++;
1221                D(printk("ethernet excessive collisions!\n"));
1222        }
1223        return IRQ_HANDLED;
1224}
1225
1226/* We have a good packet(s), get it/them out of the buffers. */
1227static void
1228e100_rx(struct net_device *dev)
1229{
1230        struct sk_buff *skb;
1231        int length = 0;
1232        struct net_local *np = netdev_priv(dev);
1233        unsigned char *skb_data_ptr;
1234#ifdef ETHDEBUG
1235        int i;
1236#endif
1237        etrax_eth_descr *prevRxDesc;  /* The descriptor right before myNextRxDesc */
1238        spin_lock(&np->led_lock);
1239        if (!led_active && time_after(jiffies, led_next_time)) {
1240                /* light the network leds depending on the current speed. */
1241                e100_set_network_leds(NETWORK_ACTIVITY);
1242
1243                /* Set the earliest time we may clear the LED */
1244                led_next_time = jiffies + NET_FLASH_TIME;
1245                led_active = 1;
1246                mod_timer(&clear_led_timer, jiffies + HZ/10);
1247        }
1248        spin_unlock(&np->led_lock);
1249
1250        length = myNextRxDesc->descr.hw_len - 4;
1251        dev->stats.rx_bytes += length;
1252
1253#ifdef ETHDEBUG
1254        printk("Got a packet of length %d:\n", length);
1255        /* dump the first bytes in the packet */
1256        skb_data_ptr = (unsigned char *)phys_to_virt(myNextRxDesc->descr.buf);
1257        for (i = 0; i < 8; i++) {
1258                printk("%d: %.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x\n", i * 8,
1259                       skb_data_ptr[0],skb_data_ptr[1],skb_data_ptr[2],skb_data_ptr[3],
1260                       skb_data_ptr[4],skb_data_ptr[5],skb_data_ptr[6],skb_data_ptr[7]);
1261                skb_data_ptr += 8;
1262        }
1263#endif
1264
1265        if (length < RX_COPYBREAK) {
1266                /* Small packet, copy data */
1267                skb = dev_alloc_skb(length - ETHER_HEAD_LEN);
1268                if (!skb) {
1269                        dev->stats.rx_errors++;
1270                        printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
1271                        goto update_nextrxdesc;
1272                }
1273
1274                skb_put(skb, length - ETHER_HEAD_LEN);        /* allocate room for the packet body */
1275                skb_data_ptr = skb_push(skb, ETHER_HEAD_LEN); /* allocate room for the header */
1276
1277#ifdef ETHDEBUG
1278                printk("head = 0x%x, data = 0x%x, tail = 0x%x, end = 0x%x\n",
1279                       skb->head, skb->data, skb_tail_pointer(skb),
1280                       skb_end_pointer(skb));
1281                printk("copying packet to 0x%x.\n", skb_data_ptr);
1282#endif
1283
1284                memcpy(skb_data_ptr, phys_to_virt(myNextRxDesc->descr.buf), length);
1285        }
1286        else {
1287                /* Large packet, send directly to upper layers and allocate new
1288                 * memory (aligned to cache line boundary to avoid bug).
1289                 * Before sending the skb to upper layers we must make sure
1290                 * that skb->data points to the aligned start of the packet.
1291                 */
1292                int align;
1293                struct sk_buff *new_skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
1294                if (!new_skb) {
1295                        dev->stats.rx_errors++;
1296                        printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
1297                        goto update_nextrxdesc;
1298                }
1299                skb = myNextRxDesc->skb;
1300                align = (int)phys_to_virt(myNextRxDesc->descr.buf) - (int)skb->data;
1301                skb_put(skb, length + align);
1302                skb_pull(skb, align); /* Remove alignment bytes */
1303                myNextRxDesc->skb = new_skb;
1304                myNextRxDesc->descr.buf = L1_CACHE_ALIGN(virt_to_phys(myNextRxDesc->skb->data));
1305        }
1306
1307        skb->protocol = eth_type_trans(skb, dev);
1308
1309        /* Send the packet to the upper layers */
1310        netif_rx(skb);
1311
1312  update_nextrxdesc:
1313        /* Prepare for next packet */
1314        myNextRxDesc->descr.status = 0;
1315        prevRxDesc = myNextRxDesc;
1316        myNextRxDesc = phys_to_virt(myNextRxDesc->descr.next);
1317
1318        rx_queue_len++;
1319
1320        /* Check if descriptors should be returned */
1321        if (rx_queue_len == RX_QUEUE_THRESHOLD) {
1322                flush_etrax_cache();
1323                prevRxDesc->descr.ctrl |= d_eol;
1324                myLastRxDesc->descr.ctrl &= ~d_eol;
1325                myLastRxDesc = prevRxDesc;
1326                rx_queue_len = 0;
1327        }
1328}
1329
1330/* The inverse routine to net_open(). */
1331static int
1332e100_close(struct net_device *dev)
1333{
1334        printk(KERN_INFO "Closing %s.\n", dev->name);
1335
1336        netif_stop_queue(dev);
1337
1338        *R_IRQ_MASK0_CLR =
1339                IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
1340                IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
1341                IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
1342
1343        *R_IRQ_MASK2_CLR =
1344                IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
1345                IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
1346                IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
1347                IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
1348
1349        /* Stop the receiver and the transmitter */
1350
1351        RESET_DMA(NETWORK_TX_DMA_NBR);
1352        RESET_DMA(NETWORK_RX_DMA_NBR);
1353
1354        /* Flush the Tx and disable Rx here. */
1355
1356        free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
1357        free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
1358        free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
1359
1360        cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
1361        cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
1362
1363        /* Update the statistics here. */
1364
1365        update_rx_stats(&dev->stats);
1366        update_tx_stats(&dev->stats);
1367
1368        /* Stop speed/duplex timers */
1369        del_timer(&speed_timer);
1370        del_timer(&duplex_timer);
1371
1372        return 0;
1373}
1374
1375static int
1376e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1377{
1378        struct mii_ioctl_data *data = if_mii(ifr);
1379        struct net_local *np = netdev_priv(dev);
1380        int rc = 0;
1381        int old_autoneg;
1382
1383        spin_lock(&np->lock); /* Preempt protection */
1384        switch (cmd) {
1385                /* The ioctls below should be considered obsolete but are */
1386                /* still present for compatibility with old scripts/apps  */
1387                case SET_ETH_SPEED_10:                  /* 10 Mbps */
1388                        e100_set_speed(dev, 10);
1389                        break;
1390                case SET_ETH_SPEED_100:                /* 100 Mbps */
1391                        e100_set_speed(dev, 100);
1392                        break;
1393                case SET_ETH_SPEED_AUTO:        /* Auto-negotiate speed */
1394                        e100_set_speed(dev, 0);
1395                        break;
1396                case SET_ETH_DUPLEX_HALF:       /* Half duplex */
1397                        e100_set_duplex(dev, half);
1398                        break;
1399                case SET_ETH_DUPLEX_FULL:       /* Full duplex */
1400                        e100_set_duplex(dev, full);
1401                        break;
1402                case SET_ETH_DUPLEX_AUTO:       /* Auto-negotiate duplex */
1403                        e100_set_duplex(dev, autoneg);
1404                        break;
1405                case SET_ETH_AUTONEG:
1406                        old_autoneg = autoneg_normal;
1407                        autoneg_normal = *(int*)data;
1408                        if (autoneg_normal != old_autoneg)
1409                                e100_negotiate(dev);
1410                        break;
1411                default:
1412                        rc = generic_mii_ioctl(&np->mii_if, if_mii(ifr),
1413                                                cmd, NULL);
1414                        break;
1415        }
1416        spin_unlock(&np->lock);
1417        return rc;
1418}
1419
1420static int e100_get_settings(struct net_device *dev,
1421                             struct ethtool_cmd *cmd)
1422{
1423        struct net_local *np = netdev_priv(dev);
1424        int err;
1425
1426        spin_lock_irq(&np->lock);
1427        err = mii_ethtool_gset(&np->mii_if, cmd);
1428        spin_unlock_irq(&np->lock);
1429
1430        /* The PHY may support 1000baseT, but the Etrax100 does not.  */
1431        cmd->supported &= ~(SUPPORTED_1000baseT_Half
1432                            | SUPPORTED_1000baseT_Full);
1433        return err;
1434}
1435
1436static int e100_set_settings(struct net_device *dev,
1437                             struct ethtool_cmd *ecmd)
1438{
1439        if (ecmd->autoneg == AUTONEG_ENABLE) {
1440                e100_set_duplex(dev, autoneg);
1441                e100_set_speed(dev, 0);
1442        } else {
1443                e100_set_duplex(dev, ecmd->duplex == DUPLEX_HALF ? half : full);
1444                e100_set_speed(dev, ecmd->speed == SPEED_10 ? 10: 100);
1445        }
1446
1447        return 0;
1448}
1449
1450static void e100_get_drvinfo(struct net_device *dev,
1451                             struct ethtool_drvinfo *info)
1452{
1453        strncpy(info->driver, "ETRAX 100LX", sizeof(info->driver) - 1);
1454        strncpy(info->version, "$Revision: 1.31 $", sizeof(info->version) - 1);
1455        strncpy(info->fw_version, "N/A", sizeof(info->fw_version) - 1);
1456        strncpy(info->bus_info, "N/A", sizeof(info->bus_info) - 1);
1457}
1458
1459static int e100_nway_reset(struct net_device *dev)
1460{
1461        if (current_duplex == autoneg && current_speed_selection == 0)
1462                e100_negotiate(dev);
1463        return 0;
1464}
1465
1466static const struct ethtool_ops e100_ethtool_ops = {
1467        .get_settings   = e100_get_settings,
1468        .set_settings   = e100_set_settings,
1469        .get_drvinfo    = e100_get_drvinfo,
1470        .nway_reset     = e100_nway_reset,
1471        .get_link       = ethtool_op_get_link,
1472};
1473
1474static int
1475e100_set_config(struct net_device *dev, struct ifmap *map)
1476{
1477        struct net_local *np = netdev_priv(dev);
1478
1479        spin_lock(&np->lock); /* Preempt protection */
1480
1481        switch(map->port) {
1482                case IF_PORT_UNKNOWN:
1483                        /* Use autoneg */
1484                        e100_set_speed(dev, 0);
1485                        e100_set_duplex(dev, autoneg);
1486                        break;
1487                case IF_PORT_10BASET:
1488                        e100_set_speed(dev, 10);
1489                        e100_set_duplex(dev, autoneg);
1490                        break;
1491                case IF_PORT_100BASET:
1492                case IF_PORT_100BASETX:
1493                        e100_set_speed(dev, 100);
1494                        e100_set_duplex(dev, autoneg);
1495                        break;
1496                case IF_PORT_100BASEFX:
1497                case IF_PORT_10BASE2:
1498                case IF_PORT_AUI:
1499                        spin_unlock(&np->lock);
1500                        return -EOPNOTSUPP;
1501                        break;
1502                default:
1503                        printk(KERN_ERR "%s: Invalid media selected", dev->name);
1504                        spin_unlock(&np->lock);
1505                        return -EINVAL;
1506        }
1507        spin_unlock(&np->lock);
1508        return 0;
1509}
1510
1511static void
1512update_rx_stats(struct net_device_stats *es)
1513{
1514        unsigned long r = *R_REC_COUNTERS;
1515        /* update stats relevant to reception errors */
1516        es->rx_fifo_errors += IO_EXTRACT(R_REC_COUNTERS, congestion, r);
1517        es->rx_crc_errors += IO_EXTRACT(R_REC_COUNTERS, crc_error, r);
1518        es->rx_frame_errors += IO_EXTRACT(R_REC_COUNTERS, alignment_error, r);
1519        es->rx_length_errors += IO_EXTRACT(R_REC_COUNTERS, oversize, r);
1520}
1521
1522static void
1523update_tx_stats(struct net_device_stats *es)
1524{
1525        unsigned long r = *R_TR_COUNTERS;
1526        /* update stats relevant to transmission errors */
1527        es->collisions +=
1528                IO_EXTRACT(R_TR_COUNTERS, single_col, r) +
1529                IO_EXTRACT(R_TR_COUNTERS, multiple_col, r);
1530}
1531
1532/*
1533 * Get the current statistics.
1534 * This may be called with the card open or closed.
1535 */
1536static struct net_device_stats *
1537e100_get_stats(struct net_device *dev)
1538{
1539        struct net_local *lp = netdev_priv(dev);
1540        unsigned long flags;
1541
1542        spin_lock_irqsave(&lp->lock, flags);
1543
1544        update_rx_stats(&dev->stats);
1545        update_tx_stats(&dev->stats);
1546
1547        spin_unlock_irqrestore(&lp->lock, flags);
1548        return &dev->stats;
1549}
1550
1551/*
1552 * Set or clear the multicast filter for this adaptor.
1553 * num_addrs == -1      Promiscuous mode, receive all packets
1554 * num_addrs == 0       Normal mode, clear multicast list
1555 * num_addrs > 0        Multicast mode, receive normal and MC packets,
1556 *                      and do best-effort filtering.
1557 */
1558static void
1559set_multicast_list(struct net_device *dev)
1560{
1561        struct net_local *lp = netdev_priv(dev);
1562        int num_addr = netdev_mc_count(dev);
1563        unsigned long int lo_bits;
1564        unsigned long int hi_bits;
1565
1566        spin_lock(&lp->lock);
1567        if (dev->flags & IFF_PROMISC) {
1568                /* promiscuous mode */
1569                lo_bits = 0xfffffffful;
1570                hi_bits = 0xfffffffful;
1571
1572                /* Enable individual receive */
1573                SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, receive);
1574                *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1575        } else if (dev->flags & IFF_ALLMULTI) {
1576                /* enable all multicasts */
1577                lo_bits = 0xfffffffful;
1578                hi_bits = 0xfffffffful;
1579
1580                /* Disable individual receive */
1581                SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1582                *R_NETWORK_REC_CONFIG =  network_rec_config_shadow;
1583        } else if (num_addr == 0) {
1584                /* Normal, clear the mc list */
1585                lo_bits = 0x00000000ul;
1586                hi_bits = 0x00000000ul;
1587
1588                /* Disable individual receive */
1589                SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1590                *R_NETWORK_REC_CONFIG =  network_rec_config_shadow;
1591        } else {
1592                /* MC mode, receive normal and MC packets */
1593                char hash_ix;
1594                struct netdev_hw_addr *ha;
1595                char *baddr;
1596
1597                lo_bits = 0x00000000ul;
1598                hi_bits = 0x00000000ul;
1599                netdev_for_each_mc_addr(ha, dev) {
1600                        /* Calculate the hash index for the GA registers */
1601
1602                        hash_ix = 0;
1603                        baddr = ha->addr;
1604                        hash_ix ^= (*baddr) & 0x3f;
1605                        hash_ix ^= ((*baddr) >> 6) & 0x03;
1606                        ++baddr;
1607                        hash_ix ^= ((*baddr) << 2) & 0x03c;
1608                        hash_ix ^= ((*baddr) >> 4) & 0xf;
1609                        ++baddr;
1610                        hash_ix ^= ((*baddr) << 4) & 0x30;
1611                        hash_ix ^= ((*baddr) >> 2) & 0x3f;
1612                        ++baddr;
1613                        hash_ix ^= (*baddr) & 0x3f;
1614                        hash_ix ^= ((*baddr) >> 6) & 0x03;
1615                        ++baddr;
1616                        hash_ix ^= ((*baddr) << 2) & 0x03c;
1617                        hash_ix ^= ((*baddr) >> 4) & 0xf;
1618                        ++baddr;
1619                        hash_ix ^= ((*baddr) << 4) & 0x30;
1620                        hash_ix ^= ((*baddr) >> 2) & 0x3f;
1621
1622                        hash_ix &= 0x3f;
1623
1624                        if (hash_ix >= 32) {
1625                                hi_bits |= (1 << (hash_ix-32));
1626                        } else {
1627                                lo_bits |= (1 << hash_ix);
1628                        }
1629                }
1630                /* Disable individual receive */
1631                SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1632                *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1633        }
1634        *R_NETWORK_GA_0 = lo_bits;
1635        *R_NETWORK_GA_1 = hi_bits;
1636        spin_unlock(&lp->lock);
1637}
1638
1639void
1640e100_hardware_send_packet(struct net_local *np, char *buf, int length)
1641{
1642        D(printk("e100 send pack, buf 0x%x len %d\n", buf, length));
1643
1644        spin_lock(&np->led_lock);
1645        if (!led_active && time_after(jiffies, led_next_time)) {
1646                /* light the network leds depending on the current speed. */
1647                e100_set_network_leds(NETWORK_ACTIVITY);
1648
1649                /* Set the earliest time we may clear the LED */
1650                led_next_time = jiffies + NET_FLASH_TIME;
1651                led_active = 1;
1652                mod_timer(&clear_led_timer, jiffies + HZ/10);
1653        }
1654        spin_unlock(&np->led_lock);
1655
1656        /* configure the tx dma descriptor */
1657        myNextTxDesc->descr.sw_len = length;
1658        myNextTxDesc->descr.ctrl = d_eop | d_eol | d_wait;
1659        myNextTxDesc->descr.buf = virt_to_phys(buf);
1660
1661        /* Move end of list */
1662        myLastTxDesc->descr.ctrl &= ~d_eol;
1663        myLastTxDesc = myNextTxDesc;
1664
1665        /* Restart DMA channel */
1666        *R_DMA_CH0_CMD = IO_STATE(R_DMA_CH0_CMD, cmd, restart);
1667}
1668
1669static void
1670e100_clear_network_leds(unsigned long dummy)
1671{
1672        struct net_device *dev = (struct net_device *)dummy;
1673        struct net_local *np = netdev_priv(dev);
1674
1675        spin_lock(&np->led_lock);
1676
1677        if (led_active && time_after(jiffies, led_next_time)) {
1678                e100_set_network_leds(NO_NETWORK_ACTIVITY);
1679
1680                /* Set the earliest time we may set the LED */
1681                led_next_time = jiffies + NET_FLASH_PAUSE;
1682                led_active = 0;
1683        }
1684
1685        spin_unlock(&np->led_lock);
1686}
1687
1688static void
1689e100_set_network_leds(int active)
1690{
1691#if defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK)
1692        int light_leds = (active == NO_NETWORK_ACTIVITY);
1693#elif defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY)
1694        int light_leds = (active == NETWORK_ACTIVITY);
1695#else
1696#error "Define either CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK or CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY"
1697#endif
1698
1699        if (!current_speed) {
1700                /* Make LED red, link is down */
1701                CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
1702        } else if (light_leds) {
1703                if (current_speed == 10) {
1704                        CRIS_LED_NETWORK_SET(CRIS_LED_ORANGE);
1705                } else {
1706                        CRIS_LED_NETWORK_SET(CRIS_LED_GREEN);
1707                }
1708        } else {
1709                CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
1710        }
1711}
1712
1713#ifdef CONFIG_NET_POLL_CONTROLLER
1714static void
1715e100_netpoll(struct net_device* netdev)
1716{
1717        e100rxtx_interrupt(NETWORK_DMA_TX_IRQ_NBR, netdev, NULL);
1718}
1719#endif
1720
1721static int
1722etrax_init_module(void)
1723{
1724        return etrax_ethernet_init();
1725}
1726
1727static int __init
1728e100_boot_setup(char* str)
1729{
1730        struct sockaddr sa = {0};
1731        int i;
1732
1733        /* Parse the colon separated Ethernet station address */
1734        for (i = 0; i <  ETH_ALEN; i++) {
1735                unsigned int tmp;
1736                if (sscanf(str + 3*i, "%2x", &tmp) != 1) {
1737                        printk(KERN_WARNING "Malformed station address");
1738                        return 0;
1739                }
1740                sa.sa_data[i] = (char)tmp;
1741        }
1742
1743        default_mac = sa;
1744        return 1;
1745}
1746
1747__setup("etrax100_eth=", e100_boot_setup);
1748
1749module_init(etrax_init_module);
1750