ray_cs.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

    }
    local->card_status = CARD_DL_PARAM;
    /* Start kernel timer to wait for dl startup to complete. */
    local->timer.expires = jiffies + HZ/2;
    local->timer.data = (long)local;
    local->timer.function = &verify_dl_startup;
    add_timer(&local->timer);
    DEBUG(2,"ray_cs dl_startup_params started timer for verify_dl_startup\n");
    return 0;
} /* dl_startup_params */
/*===========================================================================*/
static void init_startup_params(ray_dev_t *local)
{
    int i; 

    if (country > JAPAN_TEST) country = USA;
    else
        if (country < USA) country = USA;
    /* structure for hop time and beacon period is defined here using 
     * New 802.11D6.1 format.  Card firmware is still using old format
     * until version 6.
     *    Before                    After
     *    a_hop_time ms byte        a_hop_time ms byte
     *    a_hop_time 2s byte        a_hop_time ls byte
     *    a_hop_time ls byte        a_beacon_period ms byte
     *    a_beacon_period           a_beacon_period ls byte
     *
     *    a_hop_time = uS           a_hop_time = KuS
     *    a_beacon_period = hops    a_beacon_period = KuS
     */                             /* 64ms = 010000 */
    if (local->fw_ver == 0x55)  {
        memcpy((UCHAR *)&local->sparm.b4, b4_default_startup_parms, 
               sizeof(struct b4_startup_params));
        /* Translate sane kus input values to old build 4/5 format */
        /* i = hop time in uS truncated to 3 bytes */
        i = (hop_dwell * 1024) & 0xffffff;
        local->sparm.b4.a_hop_time[0] = (i >> 16) & 0xff;
        local->sparm.b4.a_hop_time[1] = (i >> 8) & 0xff;
        local->sparm.b4.a_beacon_period[0] = 0;
        local->sparm.b4.a_beacon_period[1] =
            ((beacon_period/hop_dwell) - 1) & 0xff;
        local->sparm.b4.a_curr_country_code = country;
        local->sparm.b4.a_hop_pattern_length = 
            hop_pattern_length[(int)country] - 1;
        if (bc)
        {
            local->sparm.b4.a_ack_timeout = 0x50;
            local->sparm.b4.a_sifs = 0x3f;
        }
    }
    else {    /* Version 5 uses real kus values */
        memcpy((UCHAR *)&local->sparm.b5, b5_default_startup_parms, 
               sizeof(struct b5_startup_params));

        local->sparm.b5.a_hop_time[0] = (hop_dwell >> 8) & 0xff;
        local->sparm.b5.a_hop_time[1] = hop_dwell & 0xff;
        local->sparm.b5.a_beacon_period[0] = (beacon_period >> 8) & 0xff;
        local->sparm.b5.a_beacon_period[1] = beacon_period & 0xff;
        if (psm)
            local->sparm.b5.a_power_mgt_state = 1;
        local->sparm.b5.a_curr_country_code = country;
        local->sparm.b5.a_hop_pattern_length = 
            hop_pattern_length[(int)country];
    }
    
    local->sparm.b4.a_network_type = net_type & 0x01;
    local->sparm.b4.a_acting_as_ap_status = TYPE_STA;

    if (essid != NULL)
        strncpy(local->sparm.b4.a_current_ess_id, essid, ESSID_SIZE);
} /* init_startup_params */ 
/*===========================================================================*/
static void verify_dl_startup(u_long data)
{
    ray_dev_t *local = (ray_dev_t *)data;
    struct ccs *pccs = ((struct ccs *)(local->sram + CCS_BASE)) + local->dl_param_ccs;
    UCHAR status;
    dev_link_t *link = local->finder;

    if (!(link->state & DEV_PRESENT)) {
        DEBUG(2,"ray_cs verify_dl_startup - device not present\n");
        return;
    }
#ifdef PCMCIA_DEBUG
    if (pc_debug > 2) {
    int i;
    printk(KERN_DEBUG "verify_dl_startup parameters sent via ccs %d:\n",
           local->dl_param_ccs);
        for (i=0; i<sizeof(struct b5_startup_params); i++) {
            printk(" %2x", (unsigned int) readb(local->sram + HOST_TO_ECF_BASE + i));
        }
    printk("\n");
    }
#endif

    status = readb(&pccs->buffer_status);
    if (status!= CCS_BUFFER_FREE)
    {
        printk(KERN_INFO "Download startup params failed.  Status = %d\n",
           status);
        local->card_status = CARD_DL_PARAM_ERROR;
        return;
    }
    if (local->sparm.b4.a_network_type == ADHOC)
        start_net((u_long)local);
    else
        join_net((u_long)local);

    return;
} /* end verify_dl_startup */
/*===========================================================================*/
/* Command card to start a network */
static void start_net(u_long data)
{
    ray_dev_t *local = (ray_dev_t *)data;
    struct ccs *pccs;
    int ccsindex;
    dev_link_t *link = local->finder;
    if (!(link->state & DEV_PRESENT)) {
        DEBUG(2,"ray_cs start_net - device not present\n");
        return;
    }
    /* Fill in the CCS fields for the ECF */
    if ((ccsindex = get_free_ccs(local)) < 0) return;
    pccs = ((struct ccs *)(local->sram + CCS_BASE)) + ccsindex;
    writeb(CCS_START_NETWORK, &pccs->cmd);
    writeb(0, &pccs->var.start_network.update_param);
    /* Interrupt the firmware to process the command */
    if (interrupt_ecf(local, ccsindex)) {
        DEBUG(1,"ray start net failed - card not ready for intr\n");
        writeb(CCS_BUFFER_FREE, &(pccs++)->buffer_status);
        return;
    }
    local->card_status = CARD_DOING_ACQ;
    return;
} /* end start_net */
/*===========================================================================*/
/* Command card to join a network */
static void join_net(u_long data)
{
    ray_dev_t *local = (ray_dev_t *)data;

    struct ccs *pccs;
    int ccsindex;
    dev_link_t *link = local->finder;
    
    if (!(link->state & DEV_PRESENT)) {
        DEBUG(2,"ray_cs join_net - device not present\n");
        return;
    }
    /* Fill in the CCS fields for the ECF */
    if ((ccsindex = get_free_ccs(local)) < 0) return;
    pccs = ((struct ccs *)(local->sram + CCS_BASE)) + ccsindex;
    writeb(CCS_JOIN_NETWORK, &pccs->cmd);
    writeb(0, &pccs->var.join_network.update_param);
    writeb(0, &pccs->var.join_network.net_initiated);
    /* Interrupt the firmware to process the command */
    if (interrupt_ecf(local, ccsindex)) {
        DEBUG(1,"ray join net failed - card not ready for intr\n");
        writeb(CCS_BUFFER_FREE, &(pccs++)->buffer_status);
        return;
    }
    local->card_status = CARD_DOING_ACQ;
    return;
}
/*============================================================================
    After a card is removed, ray_release() will unregister the net
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.
=============================================================================*/
static void ray_release(u_long arg)
{
    dev_link_t *link = (dev_link_t *)arg;
    struct net_device *dev = link->priv; 
    ray_dev_t *local = dev->priv;
    int i;
    
    DEBUG(1, "ray_release(0x%p)\n", link);
    /* If the device is currently in use, we won't release until it
      is actually closed.
    */
    if (link->open) {
        DEBUG(1, "ray_cs: release postponed, '%s' still open\n",
              link->dev->dev_name);
        link->state |= DEV_STALE_CONFIG;
        return;
    }
    del_timer(&local->timer);
    link->state &= ~DEV_CONFIG;

    iounmap(local->sram);
    iounmap(local->rmem);
    iounmap(local->amem);
    /* Do bother checking to see if these succeed or not */
    i = pcmcia_release_window(link->win);
    if ( i != CS_SUCCESS ) DEBUG(0,"ReleaseWindow(link->win) ret = %x\n",i);
    i = pcmcia_release_window(local->amem_handle);
    if ( i != CS_SUCCESS ) DEBUG(0,"ReleaseWindow(local->amem) ret = %x\n",i);
    i = pcmcia_release_window(local->rmem_handle);
    if ( i != CS_SUCCESS ) DEBUG(0,"ReleaseWindow(local->rmem) ret = %x\n",i);
    i = pcmcia_release_configuration(link->handle);
    if ( i != CS_SUCCESS ) DEBUG(0,"ReleaseConfiguration ret = %x\n",i);
    i = pcmcia_release_irq(link->handle, &link->irq);
    if ( i != CS_SUCCESS ) DEBUG(0,"ReleaseIRQ ret = %x\n",i);

    DEBUG(2,"ray_release ending\n");
} /* ray_release */
/*=============================================================================
    The card status event handler.  Mostly, this schedules other
    stuff to run after an event is received.  A CARD_REMOVAL event
    also sets some flags to discourage the net drivers from trying
    to talk to the card any more.

    When a CARD_REMOVAL event is received, we immediately set a flag
    to block future accesses to this device.  All the functions that
    actually access the device should check this flag to make sure
    the card is still present.
=============================================================================*/
static int ray_event(event_t event, int priority,
                     event_callback_args_t *args)
{
    dev_link_t *link = args->client_data;
    struct net_device *dev = link->priv;
    ray_dev_t *local = (ray_dev_t *)dev->priv;
    DEBUG(1, "ray_event(0x%06x)\n", event);
    
    switch (event) {
    case CS_EVENT_CARD_REMOVAL:
        link->state &= ~DEV_PRESENT;
        netif_device_detach(dev);
        if (link->state & DEV_CONFIG) {
            mod_timer(&link->release, jiffies + HZ/20);
            del_timer(&local->timer);
        }
        break;
    case CS_EVENT_CARD_INSERTION:
        link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
        ray_config(link);
        break;
    case CS_EVENT_PM_SUSPEND:
        link->state |= DEV_SUSPEND;
        /* Fall through... */
    case CS_EVENT_RESET_PHYSICAL:
        if (link->state & DEV_CONFIG) {
            if (link->open)
            	netif_device_detach(dev);

            pcmcia_release_configuration(link->handle);
        }
        break;
    case CS_EVENT_PM_RESUME:
        link->state &= ~DEV_SUSPEND;
        /* Fall through... */
    case CS_EVENT_CARD_RESET:
        if (link->state & DEV_CONFIG) {
            pcmcia_request_configuration(link->handle, &link->conf);
            if (link->open) {
                ray_reset(dev);
		netif_device_attach(dev);
            }
        }
        break;
    }
    return 0;
    DEBUG(2,"ray_event ending\n");
} /* ray_event */
/*===========================================================================*/
int ray_dev_init(struct net_device *dev)
{
    int i;
    ray_dev_t *local = dev->priv;
    dev_link_t *link = local->finder;

    DEBUG(1,"ray_dev_init(dev=%p)\n",dev);
    if (!(link->state & DEV_PRESENT)) {
        DEBUG(2,"ray_dev_init - device not present\n");
        return -1;
    }
    /* Download startup parameters */
    if ( (i = dl_startup_params(dev)) < 0)
    {
        printk(KERN_INFO "ray_dev_init dl_startup_params failed - "
           "returns 0x%x\n",i);
        return -1;
    }
    
    /* copy mac and broadcast addresses to linux device */
    memcpy(&dev->dev_addr, &local->sparm.b4.a_mac_addr, ADDRLEN);
    memset(dev->broadcast, 0xff, ETH_ALEN);

    DEBUG(2,"ray_dev_init ending\n");
    return 0;
}
/*===========================================================================*/
static int ray_dev_config(struct net_device *dev, struct ifmap *map)
{
    ray_dev_t *local = dev->priv;
    dev_link_t *link = local->finder;
    /* Dummy routine to satisfy device structure */
    DEBUG(1,"ray_dev_config(dev=%p,ifmap=%p)\n",dev,map);
    if (!(link->state & DEV_PRESENT)) {
        DEBUG(2,"ray_dev_config - device not present\n");
        return -1;
    }

    return 0;
}
/*===========================================================================*/
static int ray_dev_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
    ray_dev_t *local = dev->priv;
    dev_link_t *link = local->finder;
    short length;

    if (!(link->state & DEV_PRESENT)) {
        DEBUG(2,"ray_dev_start_xmit - device not present\n");
        return -1;
    }
    DEBUG(3,"ray_dev_start_xmit(skb=%p, dev=%p)\n",skb,dev);
    if (local->authentication_state == NEED_TO_AUTH) {
        DEBUG(0,"ray_cs Sending authentication request.\n");
        if (!build_auth_frame (local, local->auth_id, OPEN_AUTH_REQUEST)) {
            local->authentication_state = AUTHENTICATED;
            netif_stop_queue(dev);
            return 1;
        }
    }

    length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
    switch (ray_hw_xmit( skb->data, length, dev, DATA_TYPE)) {
        case XMIT_NO_CCS:
        case XMIT_NEED_AUTH:
	    netif_stop_queue(dev);
            return 1;
        case XMIT_NO_INTR:
        case XMIT_MSG_BAD:
        case XMIT_OK:
        default:
            dev->trans_start = jiffies;
            dev_kfree_skb(skb);
            return 0;
    }
    return 0;
} /* ray_dev_start_xmit */
/*===========================================================================*/
static int ray_hw_xmit(unsigned char* data, int len, struct net_device* dev, 
                UCHAR msg_type)
{
    ray_dev_t *local = (ray_dev_t *)dev->priv;
    struct ccs *pccs;
    int ccsindex;
    int offset;
    struct tx_msg *ptx; /* Address of xmit buffer in PC space */
    short int addr;     /* Address of xmit buffer in card space */
    
    DEBUG(3,"ray_hw_xmit(data=%p, len=%d, dev=%p)\n",data,len,dev);
    if (len + TX_HEADER_LENGTH > TX_BUF_SIZE)
    {
        printk(KERN_INFO "ray_hw_xmit packet too large: %d bytes\n",len);
        return XMIT_MSG_BAD;
    }
	switch (ccsindex = get_free_tx_ccs(local)) {
	case ECCSBUSY:
		DEBUG(2,"ray_hw_xmit tx_ccs table busy\n");
	case ECCSFULL:
        DEBUG(2,"ray_hw_xmit No free tx ccs\n");