cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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catc.c (24135B)


      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *  Copyright (c) 2001 Vojtech Pavlik
      4 *
      5 *  CATC EL1210A NetMate USB Ethernet driver
      6 *
      7 *  Sponsored by SuSE
      8 *
      9 *  Based on the work of
     10 *		Donald Becker
     11 * 
     12 *  Old chipset support added by Simon Evans <spse@secret.org.uk> 2002
     13 *    - adds support for Belkin F5U011
     14 */
     15
     16/*
     17 * 
     18 * Should you need to contact me, the author, you can do so either by
     19 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
     20 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
     21 */
     22
     23#include <linux/module.h>
     24#include <linux/kernel.h>
     25#include <linux/string.h>
     26#include <linux/netdevice.h>
     27#include <linux/etherdevice.h>
     28#include <linux/skbuff.h>
     29#include <linux/spinlock.h>
     30#include <linux/ethtool.h>
     31#include <linux/crc32.h>
     32#include <linux/bitops.h>
     33#include <linux/gfp.h>
     34#include <linux/uaccess.h>
     35
     36#undef DEBUG
     37
     38#include <linux/usb.h>
     39
     40/*
     41 * Version information.
     42 */
     43
     44#define DRIVER_VERSION "v2.8"
     45#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@suse.cz>"
     46#define DRIVER_DESC "CATC EL1210A NetMate USB Ethernet driver"
     47#define SHORT_DRIVER_DESC "EL1210A NetMate USB Ethernet"
     48
     49MODULE_AUTHOR(DRIVER_AUTHOR);
     50MODULE_DESCRIPTION(DRIVER_DESC);
     51MODULE_LICENSE("GPL");
     52
     53static const char driver_name[] = "catc";
     54
     55/*
     56 * Some defines.
     57 */ 
     58
     59#define STATS_UPDATE		(HZ)	/* Time between stats updates */
     60#define TX_TIMEOUT		(5*HZ)	/* Max time the queue can be stopped */
     61#define PKT_SZ			1536	/* Max Ethernet packet size */
     62#define RX_MAX_BURST		15	/* Max packets per rx buffer (> 0, < 16) */
     63#define TX_MAX_BURST		15	/* Max full sized packets per tx buffer (> 0) */
     64#define CTRL_QUEUE		16	/* Max control requests in flight (power of two) */
     65#define RX_PKT_SZ		1600	/* Max size of receive packet for F5U011 */
     66
     67/*
     68 * Control requests.
     69 */
     70
     71enum control_requests {
     72	ReadMem =	0xf1,
     73	GetMac =	0xf2,
     74	Reset =		0xf4,
     75	SetMac =	0xf5,
     76	SetRxMode =     0xf5,  /* F5U011 only */
     77	WriteROM =	0xf8,
     78	SetReg =	0xfa,
     79	GetReg =	0xfb,
     80	WriteMem =	0xfc,
     81	ReadROM =	0xfd,
     82};
     83
     84/*
     85 * Registers.
     86 */
     87
     88enum register_offsets {
     89	TxBufCount =	0x20,
     90	RxBufCount =	0x21,
     91	OpModes =	0x22,
     92	TxQed =		0x23,
     93	RxQed =		0x24,
     94	MaxBurst =	0x25,
     95	RxUnit =	0x60,
     96	EthStatus =	0x61,
     97	StationAddr0 =	0x67,
     98	EthStats =	0x69,
     99	LEDCtrl =	0x81,
    100};
    101
    102enum eth_stats {
    103	TxSingleColl =	0x00,
    104        TxMultiColl =	0x02,
    105        TxExcessColl =	0x04,
    106        RxFramErr =	0x06,
    107};
    108
    109enum op_mode_bits {
    110	Op3MemWaits =	0x03,
    111	OpLenInclude =	0x08,
    112	OpRxMerge =	0x10,
    113	OpTxMerge =	0x20,
    114	OpWin95bugfix =	0x40,
    115	OpLoopback =	0x80,
    116};
    117
    118enum rx_filter_bits {
    119	RxEnable =	0x01,
    120	RxPolarity =	0x02,
    121	RxForceOK =	0x04,
    122	RxMultiCast =	0x08,
    123	RxPromisc =	0x10,
    124	AltRxPromisc =  0x20, /* F5U011 uses different bit */
    125};
    126
    127enum led_values {
    128	LEDFast = 	0x01,
    129	LEDSlow =	0x02,
    130	LEDFlash =	0x03,
    131	LEDPulse =	0x04,
    132	LEDLink =	0x08,
    133};
    134
    135enum link_status {
    136	LinkNoChange = 0,
    137	LinkGood     = 1,
    138	LinkBad      = 2
    139};
    140
    141/*
    142 * The catc struct.
    143 */
    144
    145#define CTRL_RUNNING	0
    146#define RX_RUNNING	1
    147#define TX_RUNNING	2
    148
    149struct catc {
    150	struct net_device *netdev;
    151	struct usb_device *usbdev;
    152
    153	unsigned long flags;
    154
    155	unsigned int tx_ptr, tx_idx;
    156	unsigned int ctrl_head, ctrl_tail;
    157	spinlock_t tx_lock, ctrl_lock;
    158
    159	u8 tx_buf[2][TX_MAX_BURST * (PKT_SZ + 2)];
    160	u8 rx_buf[RX_MAX_BURST * (PKT_SZ + 2)];
    161	u8 irq_buf[2];
    162	u8 ctrl_buf[64];
    163	struct usb_ctrlrequest ctrl_dr;
    164
    165	struct timer_list timer;
    166	u8 stats_buf[8];
    167	u16 stats_vals[4];
    168	unsigned long last_stats;
    169
    170	u8 multicast[64];
    171
    172	struct ctrl_queue {
    173		u8 dir;
    174		u8 request;
    175		u16 value;
    176		u16 index;
    177		void *buf;
    178		int len;
    179		void (*callback)(struct catc *catc, struct ctrl_queue *q);
    180	} ctrl_queue[CTRL_QUEUE];
    181
    182	struct urb *tx_urb, *rx_urb, *irq_urb, *ctrl_urb;
    183
    184	u8 is_f5u011;	/* Set if device is an F5U011 */
    185	u8 rxmode[2];	/* Used for F5U011 */
    186	atomic_t recq_sz; /* Used for F5U011 - counter of waiting rx packets */
    187};
    188
    189/*
    190 * Useful macros.
    191 */
    192
    193#define catc_get_mac(catc, mac)				catc_ctrl_msg(catc, USB_DIR_IN,  GetMac, 0, 0, mac,  6)
    194#define catc_reset(catc)				catc_ctrl_msg(catc, USB_DIR_OUT, Reset, 0, 0, NULL, 0)
    195#define catc_set_reg(catc, reg, val)			catc_ctrl_msg(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0)
    196#define catc_get_reg(catc, reg, buf)			catc_ctrl_msg(catc, USB_DIR_IN,  GetReg, 0, reg, buf, 1)
    197#define catc_write_mem(catc, addr, buf, size)		catc_ctrl_msg(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size)
    198#define catc_read_mem(catc, addr, buf, size)		catc_ctrl_msg(catc, USB_DIR_IN,  ReadMem, 0, addr, buf, size)
    199
    200#define f5u011_rxmode(catc, rxmode)			catc_ctrl_msg(catc, USB_DIR_OUT, SetRxMode, 0, 1, rxmode, 2)
    201#define f5u011_rxmode_async(catc, rxmode)		catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 1, &rxmode, 2, NULL)
    202#define f5u011_mchash_async(catc, hash)			catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 2, &hash, 8, NULL)
    203
    204#define catc_set_reg_async(catc, reg, val)		catc_ctrl_async(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0, NULL)
    205#define catc_get_reg_async(catc, reg, cb)		catc_ctrl_async(catc, USB_DIR_IN, GetReg, 0, reg, NULL, 1, cb)
    206#define catc_write_mem_async(catc, addr, buf, size)	catc_ctrl_async(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size, NULL)
    207
    208/*
    209 * Receive routines.
    210 */
    211
    212static void catc_rx_done(struct urb *urb)
    213{
    214	struct catc *catc = urb->context;
    215	u8 *pkt_start = urb->transfer_buffer;
    216	struct sk_buff *skb;
    217	int pkt_len, pkt_offset = 0;
    218	int status = urb->status;
    219
    220	if (!catc->is_f5u011) {
    221		clear_bit(RX_RUNNING, &catc->flags);
    222		pkt_offset = 2;
    223	}
    224
    225	if (status) {
    226		dev_dbg(&urb->dev->dev, "rx_done, status %d, length %d\n",
    227			status, urb->actual_length);
    228		return;
    229	}
    230
    231	do {
    232		if(!catc->is_f5u011) {
    233			pkt_len = le16_to_cpup((__le16*)pkt_start);
    234			if (pkt_len > urb->actual_length) {
    235				catc->netdev->stats.rx_length_errors++;
    236				catc->netdev->stats.rx_errors++;
    237				break;
    238			}
    239		} else {
    240			pkt_len = urb->actual_length;
    241		}
    242
    243		if (!(skb = dev_alloc_skb(pkt_len)))
    244			return;
    245
    246		skb_copy_to_linear_data(skb, pkt_start + pkt_offset, pkt_len);
    247		skb_put(skb, pkt_len);
    248
    249		skb->protocol = eth_type_trans(skb, catc->netdev);
    250		netif_rx(skb);
    251
    252		catc->netdev->stats.rx_packets++;
    253		catc->netdev->stats.rx_bytes += pkt_len;
    254
    255		/* F5U011 only does one packet per RX */
    256		if (catc->is_f5u011)
    257			break;
    258		pkt_start += (((pkt_len + 1) >> 6) + 1) << 6;
    259
    260	} while (pkt_start - (u8 *) urb->transfer_buffer < urb->actual_length);
    261
    262	if (catc->is_f5u011) {
    263		if (atomic_read(&catc->recq_sz)) {
    264			int state;
    265			atomic_dec(&catc->recq_sz);
    266			netdev_dbg(catc->netdev, "getting extra packet\n");
    267			urb->dev = catc->usbdev;
    268			if ((state = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
    269				netdev_dbg(catc->netdev,
    270					   "submit(rx_urb) status %d\n", state);
    271			}
    272		} else {
    273			clear_bit(RX_RUNNING, &catc->flags);
    274		}
    275	}
    276}
    277
    278static void catc_irq_done(struct urb *urb)
    279{
    280	struct catc *catc = urb->context;
    281	u8 *data = urb->transfer_buffer;
    282	int status = urb->status;
    283	unsigned int hasdata = 0, linksts = LinkNoChange;
    284	int res;
    285
    286	if (!catc->is_f5u011) {
    287		hasdata = data[1] & 0x80;
    288		if (data[1] & 0x40)
    289			linksts = LinkGood;
    290		else if (data[1] & 0x20)
    291			linksts = LinkBad;
    292	} else {
    293		hasdata = (unsigned int)(be16_to_cpup((__be16*)data) & 0x0fff);
    294		if (data[0] == 0x90)
    295			linksts = LinkGood;
    296		else if (data[0] == 0xA0)
    297			linksts = LinkBad;
    298	}
    299
    300	switch (status) {
    301	case 0:			/* success */
    302		break;
    303	case -ECONNRESET:	/* unlink */
    304	case -ENOENT:
    305	case -ESHUTDOWN:
    306		return;
    307	/* -EPIPE:  should clear the halt */
    308	default:		/* error */
    309		dev_dbg(&urb->dev->dev,
    310			"irq_done, status %d, data %02x %02x.\n",
    311			status, data[0], data[1]);
    312		goto resubmit;
    313	}
    314
    315	if (linksts == LinkGood) {
    316		netif_carrier_on(catc->netdev);
    317		netdev_dbg(catc->netdev, "link ok\n");
    318	}
    319
    320	if (linksts == LinkBad) {
    321		netif_carrier_off(catc->netdev);
    322		netdev_dbg(catc->netdev, "link bad\n");
    323	}
    324
    325	if (hasdata) {
    326		if (test_and_set_bit(RX_RUNNING, &catc->flags)) {
    327			if (catc->is_f5u011)
    328				atomic_inc(&catc->recq_sz);
    329		} else {
    330			catc->rx_urb->dev = catc->usbdev;
    331			if ((res = usb_submit_urb(catc->rx_urb, GFP_ATOMIC)) < 0) {
    332				dev_err(&catc->usbdev->dev,
    333					"submit(rx_urb) status %d\n", res);
    334			}
    335		} 
    336	}
    337resubmit:
    338	res = usb_submit_urb (urb, GFP_ATOMIC);
    339	if (res)
    340		dev_err(&catc->usbdev->dev,
    341			"can't resubmit intr, %s-%s, status %d\n",
    342			catc->usbdev->bus->bus_name,
    343			catc->usbdev->devpath, res);
    344}
    345
    346/*
    347 * Transmit routines.
    348 */
    349
    350static int catc_tx_run(struct catc *catc)
    351{
    352	int status;
    353
    354	if (catc->is_f5u011)
    355		catc->tx_ptr = (catc->tx_ptr + 63) & ~63;
    356
    357	catc->tx_urb->transfer_buffer_length = catc->tx_ptr;
    358	catc->tx_urb->transfer_buffer = catc->tx_buf[catc->tx_idx];
    359	catc->tx_urb->dev = catc->usbdev;
    360
    361	if ((status = usb_submit_urb(catc->tx_urb, GFP_ATOMIC)) < 0)
    362		dev_err(&catc->usbdev->dev, "submit(tx_urb), status %d\n",
    363			status);
    364
    365	catc->tx_idx = !catc->tx_idx;
    366	catc->tx_ptr = 0;
    367
    368	netif_trans_update(catc->netdev);
    369	return status;
    370}
    371
    372static void catc_tx_done(struct urb *urb)
    373{
    374	struct catc *catc = urb->context;
    375	unsigned long flags;
    376	int r, status = urb->status;
    377
    378	if (status == -ECONNRESET) {
    379		dev_dbg(&urb->dev->dev, "Tx Reset.\n");
    380		urb->status = 0;
    381		netif_trans_update(catc->netdev);
    382		catc->netdev->stats.tx_errors++;
    383		clear_bit(TX_RUNNING, &catc->flags);
    384		netif_wake_queue(catc->netdev);
    385		return;
    386	}
    387
    388	if (status) {
    389		dev_dbg(&urb->dev->dev, "tx_done, status %d, length %d\n",
    390			status, urb->actual_length);
    391		return;
    392	}
    393
    394	spin_lock_irqsave(&catc->tx_lock, flags);
    395
    396	if (catc->tx_ptr) {
    397		r = catc_tx_run(catc);
    398		if (unlikely(r < 0))
    399			clear_bit(TX_RUNNING, &catc->flags);
    400	} else {
    401		clear_bit(TX_RUNNING, &catc->flags);
    402	}
    403
    404	netif_wake_queue(catc->netdev);
    405
    406	spin_unlock_irqrestore(&catc->tx_lock, flags);
    407}
    408
    409static netdev_tx_t catc_start_xmit(struct sk_buff *skb,
    410					 struct net_device *netdev)
    411{
    412	struct catc *catc = netdev_priv(netdev);
    413	unsigned long flags;
    414	int r = 0;
    415	char *tx_buf;
    416
    417	spin_lock_irqsave(&catc->tx_lock, flags);
    418
    419	catc->tx_ptr = (((catc->tx_ptr - 1) >> 6) + 1) << 6;
    420	tx_buf = catc->tx_buf[catc->tx_idx] + catc->tx_ptr;
    421	if (catc->is_f5u011)
    422		*(__be16 *)tx_buf = cpu_to_be16(skb->len);
    423	else
    424		*(__le16 *)tx_buf = cpu_to_le16(skb->len);
    425	skb_copy_from_linear_data(skb, tx_buf + 2, skb->len);
    426	catc->tx_ptr += skb->len + 2;
    427
    428	if (!test_and_set_bit(TX_RUNNING, &catc->flags)) {
    429		r = catc_tx_run(catc);
    430		if (r < 0)
    431			clear_bit(TX_RUNNING, &catc->flags);
    432	}
    433
    434	if ((catc->is_f5u011 && catc->tx_ptr) ||
    435	    (catc->tx_ptr >= ((TX_MAX_BURST - 1) * (PKT_SZ + 2))))
    436		netif_stop_queue(netdev);
    437
    438	spin_unlock_irqrestore(&catc->tx_lock, flags);
    439
    440	if (r >= 0) {
    441		catc->netdev->stats.tx_bytes += skb->len;
    442		catc->netdev->stats.tx_packets++;
    443	}
    444
    445	dev_kfree_skb(skb);
    446
    447	return NETDEV_TX_OK;
    448}
    449
    450static void catc_tx_timeout(struct net_device *netdev, unsigned int txqueue)
    451{
    452	struct catc *catc = netdev_priv(netdev);
    453
    454	dev_warn(&netdev->dev, "Transmit timed out.\n");
    455	usb_unlink_urb(catc->tx_urb);
    456}
    457
    458/*
    459 * Control messages.
    460 */
    461
    462static int catc_ctrl_msg(struct catc *catc, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
    463{
    464        int retval = usb_control_msg(catc->usbdev,
    465		dir ? usb_rcvctrlpipe(catc->usbdev, 0) : usb_sndctrlpipe(catc->usbdev, 0),
    466		 request, 0x40 | dir, value, index, buf, len, 1000);
    467        return retval < 0 ? retval : 0;
    468}
    469
    470static void catc_ctrl_run(struct catc *catc)
    471{
    472	struct ctrl_queue *q = catc->ctrl_queue + catc->ctrl_tail;
    473	struct usb_device *usbdev = catc->usbdev;
    474	struct urb *urb = catc->ctrl_urb;
    475	struct usb_ctrlrequest *dr = &catc->ctrl_dr;
    476	int status;
    477
    478	dr->bRequest = q->request;
    479	dr->bRequestType = 0x40 | q->dir;
    480	dr->wValue = cpu_to_le16(q->value);
    481	dr->wIndex = cpu_to_le16(q->index);
    482	dr->wLength = cpu_to_le16(q->len);
    483
    484        urb->pipe = q->dir ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0);
    485	urb->transfer_buffer_length = q->len;
    486	urb->transfer_buffer = catc->ctrl_buf;
    487	urb->setup_packet = (void *) dr;
    488	urb->dev = usbdev;
    489
    490	if (!q->dir && q->buf && q->len)
    491		memcpy(catc->ctrl_buf, q->buf, q->len);
    492
    493	if ((status = usb_submit_urb(catc->ctrl_urb, GFP_ATOMIC)))
    494		dev_err(&catc->usbdev->dev, "submit(ctrl_urb) status %d\n",
    495			status);
    496}
    497
    498static void catc_ctrl_done(struct urb *urb)
    499{
    500	struct catc *catc = urb->context;
    501	struct ctrl_queue *q;
    502	unsigned long flags;
    503	int status = urb->status;
    504
    505	if (status)
    506		dev_dbg(&urb->dev->dev, "ctrl_done, status %d, len %d.\n",
    507			status, urb->actual_length);
    508
    509	spin_lock_irqsave(&catc->ctrl_lock, flags);
    510
    511	q = catc->ctrl_queue + catc->ctrl_tail;
    512
    513	if (q->dir) {
    514		if (q->buf && q->len)
    515			memcpy(q->buf, catc->ctrl_buf, q->len);
    516		else
    517			q->buf = catc->ctrl_buf;
    518	}
    519
    520	if (q->callback)
    521		q->callback(catc, q);
    522
    523	catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
    524
    525	if (catc->ctrl_head != catc->ctrl_tail)
    526		catc_ctrl_run(catc);
    527	else
    528		clear_bit(CTRL_RUNNING, &catc->flags);
    529
    530	spin_unlock_irqrestore(&catc->ctrl_lock, flags);
    531}
    532
    533static int catc_ctrl_async(struct catc *catc, u8 dir, u8 request, u16 value,
    534	u16 index, void *buf, int len, void (*callback)(struct catc *catc, struct ctrl_queue *q))
    535{
    536	struct ctrl_queue *q;
    537	int retval = 0;
    538	unsigned long flags;
    539
    540	spin_lock_irqsave(&catc->ctrl_lock, flags);
    541	
    542	q = catc->ctrl_queue + catc->ctrl_head;
    543
    544	q->dir = dir;
    545	q->request = request;
    546	q->value = value;
    547	q->index = index;
    548	q->buf = buf;
    549	q->len = len;
    550	q->callback = callback;
    551
    552	catc->ctrl_head = (catc->ctrl_head + 1) & (CTRL_QUEUE - 1);
    553
    554	if (catc->ctrl_head == catc->ctrl_tail) {
    555		dev_err(&catc->usbdev->dev, "ctrl queue full\n");
    556		catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
    557		retval = -1;
    558	}
    559
    560	if (!test_and_set_bit(CTRL_RUNNING, &catc->flags))
    561		catc_ctrl_run(catc);
    562
    563	spin_unlock_irqrestore(&catc->ctrl_lock, flags);
    564
    565	return retval;
    566}
    567
    568/*
    569 * Statistics.
    570 */
    571
    572static void catc_stats_done(struct catc *catc, struct ctrl_queue *q)
    573{
    574	int index = q->index - EthStats;
    575	u16 data, last;
    576
    577	catc->stats_buf[index] = *((char *)q->buf);
    578
    579	if (index & 1)
    580		return;
    581
    582	data = ((u16)catc->stats_buf[index] << 8) | catc->stats_buf[index + 1];
    583	last = catc->stats_vals[index >> 1];
    584
    585	switch (index) {
    586		case TxSingleColl:
    587		case TxMultiColl:
    588			catc->netdev->stats.collisions += data - last;
    589			break;
    590		case TxExcessColl:
    591			catc->netdev->stats.tx_aborted_errors += data - last;
    592			catc->netdev->stats.tx_errors += data - last;
    593			break;
    594		case RxFramErr:
    595			catc->netdev->stats.rx_frame_errors += data - last;
    596			catc->netdev->stats.rx_errors += data - last;
    597			break;
    598	}
    599
    600	catc->stats_vals[index >> 1] = data;
    601}
    602
    603static void catc_stats_timer(struct timer_list *t)
    604{
    605	struct catc *catc = from_timer(catc, t, timer);
    606	int i;
    607
    608	for (i = 0; i < 8; i++)
    609		catc_get_reg_async(catc, EthStats + 7 - i, catc_stats_done);
    610
    611	mod_timer(&catc->timer, jiffies + STATS_UPDATE);
    612}
    613
    614/*
    615 * Receive modes. Broadcast, Multicast, Promisc.
    616 */
    617
    618static void catc_multicast(const unsigned char *addr, u8 *multicast)
    619{
    620	u32 crc;
    621
    622	crc = ether_crc_le(6, addr);
    623	multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
    624}
    625
    626static void catc_set_multicast_list(struct net_device *netdev)
    627{
    628	struct catc *catc = netdev_priv(netdev);
    629	struct netdev_hw_addr *ha;
    630	u8 broadcast[ETH_ALEN];
    631	u8 rx = RxEnable | RxPolarity | RxMultiCast;
    632
    633	eth_broadcast_addr(broadcast);
    634	memset(catc->multicast, 0, 64);
    635
    636	catc_multicast(broadcast, catc->multicast);
    637	catc_multicast(netdev->dev_addr, catc->multicast);
    638
    639	if (netdev->flags & IFF_PROMISC) {
    640		memset(catc->multicast, 0xff, 64);
    641		rx |= (!catc->is_f5u011) ? RxPromisc : AltRxPromisc;
    642	} 
    643
    644	if (netdev->flags & IFF_ALLMULTI) {
    645		memset(catc->multicast, 0xff, 64);
    646	} else {
    647		netdev_for_each_mc_addr(ha, netdev) {
    648			u32 crc = ether_crc_le(6, ha->addr);
    649			if (!catc->is_f5u011) {
    650				catc->multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
    651			} else {
    652				catc->multicast[7-(crc >> 29)] |= 1 << ((crc >> 26) & 7);
    653			}
    654		}
    655	}
    656	if (!catc->is_f5u011) {
    657		catc_set_reg_async(catc, RxUnit, rx);
    658		catc_write_mem_async(catc, 0xfa80, catc->multicast, 64);
    659	} else {
    660		f5u011_mchash_async(catc, catc->multicast);
    661		if (catc->rxmode[0] != rx) {
    662			catc->rxmode[0] = rx;
    663			netdev_dbg(catc->netdev,
    664				   "Setting RX mode to %2.2X %2.2X\n",
    665				   catc->rxmode[0], catc->rxmode[1]);
    666			f5u011_rxmode_async(catc, catc->rxmode);
    667		}
    668	}
    669}
    670
    671static void catc_get_drvinfo(struct net_device *dev,
    672			     struct ethtool_drvinfo *info)
    673{
    674	struct catc *catc = netdev_priv(dev);
    675	strlcpy(info->driver, driver_name, sizeof(info->driver));
    676	strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
    677	usb_make_path(catc->usbdev, info->bus_info, sizeof(info->bus_info));
    678}
    679
    680static int catc_get_link_ksettings(struct net_device *dev,
    681				   struct ethtool_link_ksettings *cmd)
    682{
    683	struct catc *catc = netdev_priv(dev);
    684	if (!catc->is_f5u011)
    685		return -EOPNOTSUPP;
    686
    687	ethtool_link_ksettings_zero_link_mode(cmd, supported);
    688	ethtool_link_ksettings_add_link_mode(cmd, supported, 10baseT_Half);
    689	ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
    690
    691	ethtool_link_ksettings_zero_link_mode(cmd, advertising);
    692	ethtool_link_ksettings_add_link_mode(cmd, advertising, 10baseT_Half);
    693	ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
    694
    695	cmd->base.speed = SPEED_10;
    696	cmd->base.duplex = DUPLEX_HALF;
    697	cmd->base.port = PORT_TP;
    698	cmd->base.phy_address = 0;
    699	cmd->base.autoneg = AUTONEG_DISABLE;
    700
    701	return 0;
    702}
    703
    704static const struct ethtool_ops ops = {
    705	.get_drvinfo = catc_get_drvinfo,
    706	.get_link = ethtool_op_get_link,
    707	.get_link_ksettings = catc_get_link_ksettings,
    708};
    709
    710/*
    711 * Open, close.
    712 */
    713
    714static int catc_open(struct net_device *netdev)
    715{
    716	struct catc *catc = netdev_priv(netdev);
    717	int status;
    718
    719	catc->irq_urb->dev = catc->usbdev;
    720	if ((status = usb_submit_urb(catc->irq_urb, GFP_KERNEL)) < 0) {
    721		dev_err(&catc->usbdev->dev, "submit(irq_urb) status %d\n",
    722			status);
    723		return -1;
    724	}
    725
    726	netif_start_queue(netdev);
    727
    728	if (!catc->is_f5u011)
    729		mod_timer(&catc->timer, jiffies + STATS_UPDATE);
    730
    731	return 0;
    732}
    733
    734static int catc_stop(struct net_device *netdev)
    735{
    736	struct catc *catc = netdev_priv(netdev);
    737
    738	netif_stop_queue(netdev);
    739
    740	if (!catc->is_f5u011)
    741		del_timer_sync(&catc->timer);
    742
    743	usb_kill_urb(catc->rx_urb);
    744	usb_kill_urb(catc->tx_urb);
    745	usb_kill_urb(catc->irq_urb);
    746	usb_kill_urb(catc->ctrl_urb);
    747
    748	return 0;
    749}
    750
    751static const struct net_device_ops catc_netdev_ops = {
    752	.ndo_open		= catc_open,
    753	.ndo_stop		= catc_stop,
    754	.ndo_start_xmit		= catc_start_xmit,
    755
    756	.ndo_tx_timeout		= catc_tx_timeout,
    757	.ndo_set_rx_mode	= catc_set_multicast_list,
    758	.ndo_set_mac_address 	= eth_mac_addr,
    759	.ndo_validate_addr	= eth_validate_addr,
    760};
    761
    762/*
    763 * USB probe, disconnect.
    764 */
    765
    766static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id)
    767{
    768	struct device *dev = &intf->dev;
    769	struct usb_device *usbdev = interface_to_usbdev(intf);
    770	struct net_device *netdev;
    771	struct catc *catc;
    772	u8 broadcast[ETH_ALEN];
    773	u8 *macbuf;
    774	int pktsz, ret = -ENOMEM;
    775
    776	macbuf = kmalloc(ETH_ALEN, GFP_KERNEL);
    777	if (!macbuf)
    778		goto error;
    779
    780	if (usb_set_interface(usbdev,
    781			intf->altsetting->desc.bInterfaceNumber, 1)) {
    782		dev_err(dev, "Can't set altsetting 1.\n");
    783		ret = -EIO;
    784		goto fail_mem;
    785	}
    786
    787	netdev = alloc_etherdev(sizeof(struct catc));
    788	if (!netdev)
    789		goto fail_mem;
    790
    791	catc = netdev_priv(netdev);
    792
    793	netdev->netdev_ops = &catc_netdev_ops;
    794	netdev->watchdog_timeo = TX_TIMEOUT;
    795	netdev->ethtool_ops = &ops;
    796
    797	catc->usbdev = usbdev;
    798	catc->netdev = netdev;
    799
    800	spin_lock_init(&catc->tx_lock);
    801	spin_lock_init(&catc->ctrl_lock);
    802
    803	timer_setup(&catc->timer, catc_stats_timer, 0);
    804
    805	catc->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
    806	catc->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
    807	catc->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
    808	catc->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
    809	if ((!catc->ctrl_urb) || (!catc->tx_urb) || 
    810	    (!catc->rx_urb) || (!catc->irq_urb)) {
    811		dev_err(&intf->dev, "No free urbs available.\n");
    812		ret = -ENOMEM;
    813		goto fail_free;
    814	}
    815
    816	/* The F5U011 has the same vendor/product as the netmate but a device version of 0x130 */
    817	if (le16_to_cpu(usbdev->descriptor.idVendor) == 0x0423 && 
    818	    le16_to_cpu(usbdev->descriptor.idProduct) == 0xa &&
    819	    le16_to_cpu(catc->usbdev->descriptor.bcdDevice) == 0x0130) {
    820		dev_dbg(dev, "Testing for f5u011\n");
    821		catc->is_f5u011 = 1;		
    822		atomic_set(&catc->recq_sz, 0);
    823		pktsz = RX_PKT_SZ;
    824	} else {
    825		pktsz = RX_MAX_BURST * (PKT_SZ + 2);
    826	}
    827	
    828	usb_fill_control_urb(catc->ctrl_urb, usbdev, usb_sndctrlpipe(usbdev, 0),
    829		NULL, NULL, 0, catc_ctrl_done, catc);
    830
    831	usb_fill_bulk_urb(catc->tx_urb, usbdev, usb_sndbulkpipe(usbdev, 1),
    832		NULL, 0, catc_tx_done, catc);
    833
    834	usb_fill_bulk_urb(catc->rx_urb, usbdev, usb_rcvbulkpipe(usbdev, 1),
    835		catc->rx_buf, pktsz, catc_rx_done, catc);
    836
    837	usb_fill_int_urb(catc->irq_urb, usbdev, usb_rcvintpipe(usbdev, 2),
    838                catc->irq_buf, 2, catc_irq_done, catc, 1);
    839
    840	if (!catc->is_f5u011) {
    841		u32 *buf;
    842		int i;
    843
    844		dev_dbg(dev, "Checking memory size\n");
    845
    846		buf = kmalloc(4, GFP_KERNEL);
    847		if (!buf) {
    848			ret = -ENOMEM;
    849			goto fail_free;
    850		}
    851
    852		*buf = 0x12345678;
    853		catc_write_mem(catc, 0x7a80, buf, 4);
    854		*buf = 0x87654321;
    855		catc_write_mem(catc, 0xfa80, buf, 4);
    856		catc_read_mem(catc, 0x7a80, buf, 4);
    857	  
    858		switch (*buf) {
    859		case 0x12345678:
    860			catc_set_reg(catc, TxBufCount, 8);
    861			catc_set_reg(catc, RxBufCount, 32);
    862			dev_dbg(dev, "64k Memory\n");
    863			break;
    864		default:
    865			dev_warn(&intf->dev,
    866				 "Couldn't detect memory size, assuming 32k\n");
    867			fallthrough;
    868		case 0x87654321:
    869			catc_set_reg(catc, TxBufCount, 4);
    870			catc_set_reg(catc, RxBufCount, 16);
    871			dev_dbg(dev, "32k Memory\n");
    872			break;
    873		}
    874
    875		kfree(buf);
    876	  
    877		dev_dbg(dev, "Getting MAC from SEEROM.\n");
    878	  
    879		catc_get_mac(catc, macbuf);
    880		eth_hw_addr_set(netdev, macbuf);
    881		
    882		dev_dbg(dev, "Setting MAC into registers.\n");
    883	  
    884		for (i = 0; i < 6; i++)
    885			catc_set_reg(catc, StationAddr0 - i, netdev->dev_addr[i]);
    886		
    887		dev_dbg(dev, "Filling the multicast list.\n");
    888	  
    889		eth_broadcast_addr(broadcast);
    890		catc_multicast(broadcast, catc->multicast);
    891		catc_multicast(netdev->dev_addr, catc->multicast);
    892		catc_write_mem(catc, 0xfa80, catc->multicast, 64);
    893		
    894		dev_dbg(dev, "Clearing error counters.\n");
    895		
    896		for (i = 0; i < 8; i++)
    897			catc_set_reg(catc, EthStats + i, 0);
    898		catc->last_stats = jiffies;
    899		
    900		dev_dbg(dev, "Enabling.\n");
    901		
    902		catc_set_reg(catc, MaxBurst, RX_MAX_BURST);
    903		catc_set_reg(catc, OpModes, OpTxMerge | OpRxMerge | OpLenInclude | Op3MemWaits);
    904		catc_set_reg(catc, LEDCtrl, LEDLink);
    905		catc_set_reg(catc, RxUnit, RxEnable | RxPolarity | RxMultiCast);
    906	} else {
    907		dev_dbg(dev, "Performing reset\n");
    908		catc_reset(catc);
    909		catc_get_mac(catc, macbuf);
    910		eth_hw_addr_set(netdev, macbuf);
    911		
    912		dev_dbg(dev, "Setting RX Mode\n");
    913		catc->rxmode[0] = RxEnable | RxPolarity | RxMultiCast;
    914		catc->rxmode[1] = 0;
    915		f5u011_rxmode(catc, catc->rxmode);
    916	}
    917	dev_dbg(dev, "Init done.\n");
    918	printk(KERN_INFO "%s: %s USB Ethernet at usb-%s-%s, %pM.\n",
    919	       netdev->name, (catc->is_f5u011) ? "Belkin F5U011" : "CATC EL1210A NetMate",
    920	       usbdev->bus->bus_name, usbdev->devpath, netdev->dev_addr);
    921	usb_set_intfdata(intf, catc);
    922
    923	SET_NETDEV_DEV(netdev, &intf->dev);
    924	ret = register_netdev(netdev);
    925	if (ret)
    926		goto fail_clear_intfdata;
    927
    928	kfree(macbuf);
    929	return 0;
    930
    931fail_clear_intfdata:
    932	usb_set_intfdata(intf, NULL);
    933fail_free:
    934	usb_free_urb(catc->ctrl_urb);
    935	usb_free_urb(catc->tx_urb);
    936	usb_free_urb(catc->rx_urb);
    937	usb_free_urb(catc->irq_urb);
    938	free_netdev(netdev);
    939fail_mem:
    940	kfree(macbuf);
    941error:
    942	return ret;
    943}
    944
    945static void catc_disconnect(struct usb_interface *intf)
    946{
    947	struct catc *catc = usb_get_intfdata(intf);
    948
    949	usb_set_intfdata(intf, NULL);
    950	if (catc) {
    951		unregister_netdev(catc->netdev);
    952		usb_free_urb(catc->ctrl_urb);
    953		usb_free_urb(catc->tx_urb);
    954		usb_free_urb(catc->rx_urb);
    955		usb_free_urb(catc->irq_urb);
    956		free_netdev(catc->netdev);
    957	}
    958}
    959
    960/*
    961 * Module functions and tables.
    962 */
    963
    964static const struct usb_device_id catc_id_table[] = {
    965	{ USB_DEVICE(0x0423, 0xa) },	/* CATC Netmate, Belkin F5U011 */
    966	{ USB_DEVICE(0x0423, 0xc) },	/* CATC Netmate II, Belkin F5U111 */
    967	{ USB_DEVICE(0x08d1, 0x1) },	/* smartBridges smartNIC */
    968	{ }
    969};
    970
    971MODULE_DEVICE_TABLE(usb, catc_id_table);
    972
    973static struct usb_driver catc_driver = {
    974	.name =		driver_name,
    975	.probe =	catc_probe,
    976	.disconnect =	catc_disconnect,
    977	.id_table =	catc_id_table,
    978	.disable_hub_initiated_lpm = 1,
    979};
    980
    981module_usb_driver(catc_driver);