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ARM: dma-mapping: fix error path for memory allocation failure
[linux-2.6.git] / drivers / net / wan / wanxl.c
blobfeb7541b33fbb8191928581eaaacc024dc193e5c
1 /*
2 * wanXL serial card driver for Linux
3 * host part
4 *
5 * Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License
9 * as published by the Free Software Foundation.
10 *
11 * Status:
12 * - Only DTE (external clock) support with NRZ and NRZI encodings
13 * - wanXL100 will require minor driver modifications, no access to hw
14 */
15
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/slab.h>
21 #include <linux/sched.h>
22 #include <linux/types.h>
23 #include <linux/fcntl.h>
24 #include <linux/string.h>
25 #include <linux/errno.h>
26 #include <linux/init.h>
27 #include <linux/interrupt.h>
28 #include <linux/ioport.h>
29 #include <linux/netdevice.h>
30 #include <linux/hdlc.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/delay.h>
34 #include <asm/io.h>
35
36 #include "wanxl.h"
37
38 static const char* version = "wanXL serial card driver version: 0.48";
39
40 #define PLX_CTL_RESET 0x40000000 /* adapter reset */
41
42 #undef DEBUG_PKT
43 #undef DEBUG_PCI
44
45 /* MAILBOX #1 - PUTS COMMANDS */
46 #define MBX1_CMD_ABORTJ 0x85000000 /* Abort and Jump */
47 #ifdef __LITTLE_ENDIAN
48 #define MBX1_CMD_BSWAP 0x8C000001 /* little-endian Byte Swap Mode */
49 #else
50 #define MBX1_CMD_BSWAP 0x8C000000 /* big-endian Byte Swap Mode */
51 #endif
52
53 /* MAILBOX #2 - DRAM SIZE */
54 #define MBX2_MEMSZ_MASK 0xFFFF0000 /* PUTS Memory Size Register mask */
55
56
57 typedef struct {
58 struct net_device *dev;
59 struct card_t *card;
60 spinlock_t lock; /* for wanxl_xmit */
61 int node; /* physical port #0 - 3 */
62 unsigned int clock_type;
63 int tx_in, tx_out;
64 struct sk_buff *tx_skbs[TX_BUFFERS];
65 }port_t;
66
67
68 typedef struct {
69 desc_t rx_descs[RX_QUEUE_LENGTH];
70 port_status_t port_status[4];
71 }card_status_t;
72
73
74 typedef struct card_t {
75 int n_ports; /* 1, 2 or 4 ports */
76 u8 irq;
77
78 u8 __iomem *plx; /* PLX PCI9060 virtual base address */
79 struct pci_dev *pdev; /* for pci_name(pdev) */
80 int rx_in;
81 struct sk_buff *rx_skbs[RX_QUEUE_LENGTH];
82 card_status_t *status; /* shared between host and card */
83 dma_addr_t status_address;
84 port_t ports[0]; /* 1 - 4 port_t structures follow */
85 }card_t;
86
87
88
89 static inline port_t* dev_to_port(struct net_device *dev)
90 {
91 return (port_t *)dev_to_hdlc(dev)->priv;
92 }
93
94
95 static inline port_status_t* get_status(port_t *port)
96 {
97 return &port->card->status->port_status[port->node];
98 }
99
100
101 #ifdef DEBUG_PCI
102 static inline dma_addr_t pci_map_single_debug(struct pci_dev *pdev, void *ptr,
103 size_t size, int direction)
104 {
105 dma_addr_t addr = pci_map_single(pdev, ptr, size, direction);
106 if (addr + size > 0x100000000LL)
107 pr_crit("%s: pci_map_single() returned memory at 0x%llx!\n",
108 pci_name(pdev), (unsigned long long)addr);
109 return addr;
110 }
111
112 #undef pci_map_single
113 #define pci_map_single pci_map_single_debug
114 #endif
115
116
117 /* Cable and/or personality module change interrupt service */
118 static inline void wanxl_cable_intr(port_t *port)
119 {
120 u32 value = get_status(port)->cable;
121 int valid = 1;
122 const char *cable, *pm, *dte = "", *dsr = "", *dcd = "";
123
124 switch(value & 0x7) {
125 case STATUS_CABLE_V35: cable = "V.35"; break;
126 case STATUS_CABLE_X21: cable = "X.21"; break;
127 case STATUS_CABLE_V24: cable = "V.24"; break;
128 case STATUS_CABLE_EIA530: cable = "EIA530"; break;
129 case STATUS_CABLE_NONE: cable = "no"; break;
130 default: cable = "invalid";
131 }
132
133 switch((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
134 case STATUS_CABLE_V35: pm = "V.35"; break;
135 case STATUS_CABLE_X21: pm = "X.21"; break;
136 case STATUS_CABLE_V24: pm = "V.24"; break;
137 case STATUS_CABLE_EIA530: pm = "EIA530"; break;
138 case STATUS_CABLE_NONE: pm = "no personality"; valid = 0; break;
139 default: pm = "invalid personality"; valid = 0;
140 }
141
142 if (valid) {
143 if ((value & 7) == ((value >> STATUS_CABLE_PM_SHIFT) & 7)) {
144 dsr = (value & STATUS_CABLE_DSR) ? ", DSR ON" :
145 ", DSR off";
146 dcd = (value & STATUS_CABLE_DCD) ? ", carrier ON" :
147 ", carrier off";
148 }
149 dte = (value & STATUS_CABLE_DCE) ? " DCE" : " DTE";
150 }
151 netdev_info(port->dev, "%s%s module, %s cable%s%s\n",
152 pm, dte, cable, dsr, dcd);
153
154 if (value & STATUS_CABLE_DCD)
155 netif_carrier_on(port->dev);
156 else
157 netif_carrier_off(port->dev);
158 }
159
160
161
162 /* Transmit complete interrupt service */
163 static inline void wanxl_tx_intr(port_t *port)
164 {
165 struct net_device *dev = port->dev;
166 while (1) {
167 desc_t *desc = &get_status(port)->tx_descs[port->tx_in];
168 struct sk_buff *skb = port->tx_skbs[port->tx_in];
169
170 switch (desc->stat) {
171 case PACKET_FULL:
172 case PACKET_EMPTY:
173 netif_wake_queue(dev);
174 return;
175
176 case PACKET_UNDERRUN:
177 dev->stats.tx_errors++;
178 dev->stats.tx_fifo_errors++;
179 break;
180
181 default:
182 dev->stats.tx_packets++;
183 dev->stats.tx_bytes += skb->len;
184 }
185 desc->stat = PACKET_EMPTY; /* Free descriptor */
186 pci_unmap_single(port->card->pdev, desc->address, skb->len,
187 PCI_DMA_TODEVICE);
188 dev_kfree_skb_irq(skb);
189 port->tx_in = (port->tx_in + 1) % TX_BUFFERS;
190 }
191 }
192
193
194
195 /* Receive complete interrupt service */
196 static inline void wanxl_rx_intr(card_t *card)
197 {
198 desc_t *desc;
199 while (desc = &card->status->rx_descs[card->rx_in],
200 desc->stat != PACKET_EMPTY) {
201 if ((desc->stat & PACKET_PORT_MASK) > card->n_ports)
202 pr_crit("%s: received packet for nonexistent port\n",
203 pci_name(card->pdev));
204 else {
205 struct sk_buff *skb = card->rx_skbs[card->rx_in];
206 port_t *port = &card->ports[desc->stat &
207 PACKET_PORT_MASK];
208 struct net_device *dev = port->dev;
209
210 if (!skb)
211 dev->stats.rx_dropped++;
212 else {
213 pci_unmap_single(card->pdev, desc->address,
214 BUFFER_LENGTH,
215 PCI_DMA_FROMDEVICE);
216 skb_put(skb, desc->length);
217
218 #ifdef DEBUG_PKT
219 printk(KERN_DEBUG "%s RX(%i):", dev->name,
220 skb->len);
221 debug_frame(skb);
222 #endif
223 dev->stats.rx_packets++;
224 dev->stats.rx_bytes += skb->len;
225 skb->protocol = hdlc_type_trans(skb, dev);
226 netif_rx(skb);
227 skb = NULL;
228 }
229
230 if (!skb) {
231 skb = dev_alloc_skb(BUFFER_LENGTH);
232 desc->address = skb ?
233 pci_map_single(card->pdev, skb->data,
234 BUFFER_LENGTH,
235 PCI_DMA_FROMDEVICE) : 0;
236 card->rx_skbs[card->rx_in] = skb;
237 }
238 }
239 desc->stat = PACKET_EMPTY; /* Free descriptor */
240 card->rx_in = (card->rx_in + 1) % RX_QUEUE_LENGTH;
241 }
242 }
243
244
245
246 static irqreturn_t wanxl_intr(int irq, void* dev_id)
247 {
248 card_t *card = dev_id;
249 int i;
250 u32 stat;
251 int handled = 0;
252
253
254 while((stat = readl(card->plx + PLX_DOORBELL_FROM_CARD)) != 0) {
255 handled = 1;
256 writel(stat, card->plx + PLX_DOORBELL_FROM_CARD);
257
258 for (i = 0; i < card->n_ports; i++) {
259 if (stat & (1 << (DOORBELL_FROM_CARD_TX_0 + i)))
260 wanxl_tx_intr(&card->ports[i]);
261 if (stat & (1 << (DOORBELL_FROM_CARD_CABLE_0 + i)))
262 wanxl_cable_intr(&card->ports[i]);
263 }
264 if (stat & (1 << DOORBELL_FROM_CARD_RX))
265 wanxl_rx_intr(card);
266 }
267
268 return IRQ_RETVAL(handled);
269 }
270
271
272
273 static netdev_tx_t wanxl_xmit(struct sk_buff *skb, struct net_device *dev)
274 {
275 port_t *port = dev_to_port(dev);
276 desc_t *desc;
277
278 spin_lock(&port->lock);
279
280 desc = &get_status(port)->tx_descs[port->tx_out];
281 if (desc->stat != PACKET_EMPTY) {
282 /* should never happen - previous xmit should stop queue */
283 #ifdef DEBUG_PKT
284 printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
285 #endif
286 netif_stop_queue(dev);
287 spin_unlock(&port->lock);
288 return NETDEV_TX_BUSY; /* request packet to be queued */
289 }
290
291 #ifdef DEBUG_PKT
292 printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
293 debug_frame(skb);
294 #endif
295
296 port->tx_skbs[port->tx_out] = skb;
297 desc->address = pci_map_single(port->card->pdev, skb->data, skb->len,
298 PCI_DMA_TODEVICE);
299 desc->length = skb->len;
300 desc->stat = PACKET_FULL;
301 writel(1 << (DOORBELL_TO_CARD_TX_0 + port->node),
302 port->card->plx + PLX_DOORBELL_TO_CARD);
303
304 port->tx_out = (port->tx_out + 1) % TX_BUFFERS;
305
306 if (get_status(port)->tx_descs[port->tx_out].stat != PACKET_EMPTY) {
307 netif_stop_queue(dev);
308 #ifdef DEBUG_PKT
309 printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
310 #endif
311 }
312
313 spin_unlock(&port->lock);
314 return NETDEV_TX_OK;
315 }
316
317
318
319 static int wanxl_attach(struct net_device *dev, unsigned short encoding,
320 unsigned short parity)
321 {
322 port_t *port = dev_to_port(dev);
323
324 if (encoding != ENCODING_NRZ &&
325 encoding != ENCODING_NRZI)
326 return -EINVAL;
327
328 if (parity != PARITY_NONE &&
329 parity != PARITY_CRC32_PR1_CCITT &&
330 parity != PARITY_CRC16_PR1_CCITT &&
331 parity != PARITY_CRC32_PR0_CCITT &&
332 parity != PARITY_CRC16_PR0_CCITT)
333 return -EINVAL;
334
335 get_status(port)->encoding = encoding;
336 get_status(port)->parity = parity;
337 return 0;
338 }
339
340
341
342 static int wanxl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
343 {
344 const size_t size = sizeof(sync_serial_settings);
345 sync_serial_settings line;
346 port_t *port = dev_to_port(dev);
347
348 if (cmd != SIOCWANDEV)
349 return hdlc_ioctl(dev, ifr, cmd);
350
351 switch (ifr->ifr_settings.type) {
352 case IF_GET_IFACE:
353 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
354 if (ifr->ifr_settings.size < size) {
355 ifr->ifr_settings.size = size; /* data size wanted */
356 return -ENOBUFS;
357 }
358 line.clock_type = get_status(port)->clocking;
359 line.clock_rate = 0;
360 line.loopback = 0;
361
362 if (copy_to_user(ifr->ifr_settings.ifs_ifsu.sync, &line, size))
363 return -EFAULT;
364 return 0;
365
366 case IF_IFACE_SYNC_SERIAL:
367 if (!capable(CAP_NET_ADMIN))
368 return -EPERM;
369 if (dev->flags & IFF_UP)
370 return -EBUSY;
371
372 if (copy_from_user(&line, ifr->ifr_settings.ifs_ifsu.sync,
373 size))
374 return -EFAULT;
375
376 if (line.clock_type != CLOCK_EXT &&
377 line.clock_type != CLOCK_TXFROMRX)
378 return -EINVAL; /* No such clock setting */
379
380 if (line.loopback != 0)
381 return -EINVAL;
382
383 get_status(port)->clocking = line.clock_type;
384 return 0;
385
386 default:
387 return hdlc_ioctl(dev, ifr, cmd);
388 }
389 }
390
391
392
393 static int wanxl_open(struct net_device *dev)
394 {
395 port_t *port = dev_to_port(dev);
396 u8 __iomem *dbr = port->card->plx + PLX_DOORBELL_TO_CARD;
397 unsigned long timeout;
398 int i;
399
400 if (get_status(port)->open) {
401 netdev_err(dev, "port already open\n");
402 return -EIO;
403 }
404 if ((i = hdlc_open(dev)) != 0)
405 return i;
406
407 port->tx_in = port->tx_out = 0;
408 for (i = 0; i < TX_BUFFERS; i++)
409 get_status(port)->tx_descs[i].stat = PACKET_EMPTY;
410 /* signal the card */
411 writel(1 << (DOORBELL_TO_CARD_OPEN_0 + port->node), dbr);
412
413 timeout = jiffies + HZ;
414 do {
415 if (get_status(port)->open) {
416 netif_start_queue(dev);
417 return 0;
418 }
419 } while (time_after(timeout, jiffies));
420
421 netdev_err(dev, "unable to open port\n");
422 /* ask the card to close the port, should it be still alive */
423 writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node), dbr);
424 return -EFAULT;
425 }
426
427
428
429 static int wanxl_close(struct net_device *dev)
430 {
431 port_t *port = dev_to_port(dev);
432 unsigned long timeout;
433 int i;
434
435 hdlc_close(dev);
436 /* signal the card */
437 writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node),
438 port->card->plx + PLX_DOORBELL_TO_CARD);
439
440 timeout = jiffies + HZ;
441 do {
442 if (!get_status(port)->open)
443 break;
444 } while (time_after(timeout, jiffies));
445
446 if (get_status(port)->open)
447 netdev_err(dev, "unable to close port\n");
448
449 netif_stop_queue(dev);
450
451 for (i = 0; i < TX_BUFFERS; i++) {
452 desc_t *desc = &get_status(port)->tx_descs[i];
453
454 if (desc->stat != PACKET_EMPTY) {
455 desc->stat = PACKET_EMPTY;
456 pci_unmap_single(port->card->pdev, desc->address,
457 port->tx_skbs[i]->len,
458 PCI_DMA_TODEVICE);
459 dev_kfree_skb(port->tx_skbs[i]);
460 }
461 }
462 return 0;
463 }
464
465
466
467 static struct net_device_stats *wanxl_get_stats(struct net_device *dev)
468 {
469 port_t *port = dev_to_port(dev);
470
471 dev->stats.rx_over_errors = get_status(port)->rx_overruns;
472 dev->stats.rx_frame_errors = get_status(port)->rx_frame_errors;
473 dev->stats.rx_errors = dev->stats.rx_over_errors +
474 dev->stats.rx_frame_errors;
475 return &dev->stats;
476 }
477
478
479
480 static int wanxl_puts_command(card_t *card, u32 cmd)
481 {
482 unsigned long timeout = jiffies + 5 * HZ;
483
484 writel(cmd, card->plx + PLX_MAILBOX_1);
485 do {
486 if (readl(card->plx + PLX_MAILBOX_1) == 0)
487 return 0;
488
489 schedule();
490 }while (time_after(timeout, jiffies));
491
492 return -1;
493 }
494
495
496
497 static void wanxl_reset(card_t *card)
498 {
499 u32 old_value = readl(card->plx + PLX_CONTROL) & ~PLX_CTL_RESET;
500
501 writel(0x80, card->plx + PLX_MAILBOX_0);
502 writel(old_value | PLX_CTL_RESET, card->plx + PLX_CONTROL);
503 readl(card->plx + PLX_CONTROL); /* wait for posted write */
504 udelay(1);
505 writel(old_value, card->plx + PLX_CONTROL);
506 readl(card->plx + PLX_CONTROL); /* wait for posted write */
507 }
508
509
510
511 static void wanxl_pci_remove_one(struct pci_dev *pdev)
512 {
513 card_t *card = pci_get_drvdata(pdev);
514 int i;
515
516 for (i = 0; i < card->n_ports; i++) {
517 unregister_hdlc_device(card->ports[i].dev);
518 free_netdev(card->ports[i].dev);
519 }
520
521 /* unregister and free all host resources */
522 if (card->irq)
523 free_irq(card->irq, card);
524
525 wanxl_reset(card);
526
527 for (i = 0; i < RX_QUEUE_LENGTH; i++)
528 if (card->rx_skbs[i]) {
529 pci_unmap_single(card->pdev,
530 card->status->rx_descs[i].address,
531 BUFFER_LENGTH, PCI_DMA_FROMDEVICE);
532 dev_kfree_skb(card->rx_skbs[i]);
533 }
534
535 if (card->plx)
536 iounmap(card->plx);
537
538 if (card->status)
539 pci_free_consistent(pdev, sizeof(card_status_t),
540 card->status, card->status_address);
541
542 pci_release_regions(pdev);
543 pci_disable_device(pdev);
544 pci_set_drvdata(pdev, NULL);
545 kfree(card);
546 }
547
548
549 #include "wanxlfw.inc"
550
551 static const struct net_device_ops wanxl_ops = {
552 .ndo_open = wanxl_open,
553 .ndo_stop = wanxl_close,
554 .ndo_change_mtu = hdlc_change_mtu,
555 .ndo_start_xmit = hdlc_start_xmit,
556 .ndo_do_ioctl = wanxl_ioctl,
557 .ndo_get_stats = wanxl_get_stats,
558 };
559
560 static int __devinit wanxl_pci_init_one(struct pci_dev *pdev,
561 const struct pci_device_id *ent)
562 {
563 card_t *card;
564 u32 ramsize, stat;
565 unsigned long timeout;
566 u32 plx_phy; /* PLX PCI base address */
567 u32 mem_phy; /* memory PCI base addr */
568 u8 __iomem *mem; /* memory virtual base addr */
569 int i, ports, alloc_size;
570
571 #ifndef MODULE
572 pr_info_once("%s\n", version);
573 #endif
574
575 i = pci_enable_device(pdev);
576 if (i)
577 return i;
578
579 /* QUICC can only access first 256 MB of host RAM directly,
580 but PLX9060 DMA does 32-bits for actual packet data transfers */
581
582 /* FIXME when PCI/DMA subsystems are fixed.
583 We set both dma_mask and consistent_dma_mask to 28 bits
584 and pray pci_alloc_consistent() will use this info. It should
585 work on most platforms */
586 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(28)) ||
587 pci_set_dma_mask(pdev, DMA_BIT_MASK(28))) {
588 pr_err("No usable DMA configuration\n");
589 return -EIO;
590 }
591
592 i = pci_request_regions(pdev, "wanXL");
593 if (i) {
594 pci_disable_device(pdev);
595 return i;
596 }
597
598 switch (pdev->device) {
599 case PCI_DEVICE_ID_SBE_WANXL100: ports = 1; break;
600 case PCI_DEVICE_ID_SBE_WANXL200: ports = 2; break;
601 default: ports = 4;
602 }
603
604 alloc_size = sizeof(card_t) + ports * sizeof(port_t);
605 card = kzalloc(alloc_size, GFP_KERNEL);
606 if (card == NULL) {
607 pci_release_regions(pdev);
608 pci_disable_device(pdev);
609 return -ENOBUFS;
610 }
611
612 pci_set_drvdata(pdev, card);
613 card->pdev = pdev;
614
615 card->status = pci_alloc_consistent(pdev, sizeof(card_status_t),
616 &card->status_address);
617 if (card->status == NULL) {
618 wanxl_pci_remove_one(pdev);
619 return -ENOBUFS;
620 }
621
622 #ifdef DEBUG_PCI
623 printk(KERN_DEBUG "wanXL %s: pci_alloc_consistent() returned memory"
624 " at 0x%LX\n", pci_name(pdev),
625 (unsigned long long)card->status_address);
626 #endif
627
628 /* FIXME when PCI/DMA subsystems are fixed.
629 We set both dma_mask and consistent_dma_mask back to 32 bits
630 to indicate the card can do 32-bit DMA addressing */
631 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) ||
632 pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
633 pr_err("No usable DMA configuration\n");
634 wanxl_pci_remove_one(pdev);
635 return -EIO;
636 }
637
638 /* set up PLX mapping */
639 plx_phy = pci_resource_start(pdev, 0);
640
641 card->plx = ioremap_nocache(plx_phy, 0x70);
642 if (!card->plx) {
643 pr_err("ioremap() failed\n");
644 wanxl_pci_remove_one(pdev);
645 return -EFAULT;
646 }
647
648 #if RESET_WHILE_LOADING
649 wanxl_reset(card);
650 #endif
651
652 timeout = jiffies + 20 * HZ;
653 while ((stat = readl(card->plx + PLX_MAILBOX_0)) != 0) {
654 if (time_before(timeout, jiffies)) {
655 pr_warn("%s: timeout waiting for PUTS to complete\n",
656 pci_name(pdev));
657 wanxl_pci_remove_one(pdev);
658 return -ENODEV;
659 }
660
661 switch(stat & 0xC0) {
662 case 0x00: /* hmm - PUTS completed with non-zero code? */
663 case 0x80: /* PUTS still testing the hardware */
664 break;
665
666 default:
667 pr_warn("%s: PUTS test 0x%X failed\n",
668 pci_name(pdev), stat & 0x30);
669 wanxl_pci_remove_one(pdev);
670 return -ENODEV;
671 }
672
673 schedule();
674 }
675
676 /* get on-board memory size (PUTS detects no more than 4 MB) */
677 ramsize = readl(card->plx + PLX_MAILBOX_2) & MBX2_MEMSZ_MASK;
678
679 /* set up on-board RAM mapping */
680 mem_phy = pci_resource_start(pdev, 2);
681
682
683 /* sanity check the board's reported memory size */
684 if (ramsize < BUFFERS_ADDR +
685 (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports) {
686 pr_warn("%s: no enough on-board RAM (%u bytes detected, %u bytes required)\n",
687 pci_name(pdev), ramsize,
688 BUFFERS_ADDR +
689 (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports);
690 wanxl_pci_remove_one(pdev);
691 return -ENODEV;
692 }
693
694 if (wanxl_puts_command(card, MBX1_CMD_BSWAP)) {
695 pr_warn("%s: unable to Set Byte Swap Mode\n", pci_name(pdev));
696 wanxl_pci_remove_one(pdev);
697 return -ENODEV;
698 }
699
700 for (i = 0; i < RX_QUEUE_LENGTH; i++) {
701 struct sk_buff *skb = dev_alloc_skb(BUFFER_LENGTH);
702 card->rx_skbs[i] = skb;
703 if (skb)
704 card->status->rx_descs[i].address =
705 pci_map_single(card->pdev, skb->data,
706 BUFFER_LENGTH,
707 PCI_DMA_FROMDEVICE);
708 }
709
710 mem = ioremap_nocache(mem_phy, PDM_OFFSET + sizeof(firmware));
711 if (!mem) {
712 pr_err("ioremap() failed\n");
713 wanxl_pci_remove_one(pdev);
714 return -EFAULT;
715 }
716
717 for (i = 0; i < sizeof(firmware); i += 4)
718 writel(ntohl(*(__be32*)(firmware + i)), mem + PDM_OFFSET + i);
719
720 for (i = 0; i < ports; i++)
721 writel(card->status_address +
722 (void *)&card->status->port_status[i] -
723 (void *)card->status, mem + PDM_OFFSET + 4 + i * 4);
724 writel(card->status_address, mem + PDM_OFFSET + 20);
725 writel(PDM_OFFSET, mem);
726 iounmap(mem);
727
728 writel(0, card->plx + PLX_MAILBOX_5);
729
730 if (wanxl_puts_command(card, MBX1_CMD_ABORTJ)) {
731 pr_warn("%s: unable to Abort and Jump\n", pci_name(pdev));
732 wanxl_pci_remove_one(pdev);
733 return -ENODEV;
734 }
735
736 stat = 0;
737 timeout = jiffies + 5 * HZ;
738 do {
739 if ((stat = readl(card->plx + PLX_MAILBOX_5)) != 0)
740 break;
741 schedule();
742 }while (time_after(timeout, jiffies));
743
744 if (!stat) {
745 pr_warn("%s: timeout while initializing card firmware\n",
746 pci_name(pdev));
747 wanxl_pci_remove_one(pdev);
748 return -ENODEV;
749 }
750
751 #if DETECT_RAM
752 ramsize = stat;
753 #endif
754
755 pr_info("%s: at 0x%X, %u KB of RAM at 0x%X, irq %u\n",
756 pci_name(pdev), plx_phy, ramsize / 1024, mem_phy, pdev->irq);
757
758 /* Allocate IRQ */
759 if (request_irq(pdev->irq, wanxl_intr, IRQF_SHARED, "wanXL", card)) {
760 pr_warn("%s: could not allocate IRQ%i\n",
761 pci_name(pdev), pdev->irq);
762 wanxl_pci_remove_one(pdev);
763 return -EBUSY;
764 }
765 card->irq = pdev->irq;
766
767 for (i = 0; i < ports; i++) {
768 hdlc_device *hdlc;
769 port_t *port = &card->ports[i];
770 struct net_device *dev = alloc_hdlcdev(port);
771 if (!dev) {
772 pr_err("%s: unable to allocate memory\n",
773 pci_name(pdev));
774 wanxl_pci_remove_one(pdev);
775 return -ENOMEM;
776 }
777
778 port->dev = dev;
779 hdlc = dev_to_hdlc(dev);
780 spin_lock_init(&port->lock);
781 dev->tx_queue_len = 50;
782 dev->netdev_ops = &wanxl_ops;
783 hdlc->attach = wanxl_attach;
784 hdlc->xmit = wanxl_xmit;
785 port->card = card;
786 port->node = i;
787 get_status(port)->clocking = CLOCK_EXT;
788 if (register_hdlc_device(dev)) {
789 pr_err("%s: unable to register hdlc device\n",
790 pci_name(pdev));
791 free_netdev(dev);
792 wanxl_pci_remove_one(pdev);
793 return -ENOBUFS;
794 }
795 card->n_ports++;
796 }
797
798 pr_info("%s: port", pci_name(pdev));
799 for (i = 0; i < ports; i++)
800 pr_cont("%s #%i: %s",
801 i ? "," : "", i, card->ports[i].dev->name);
802 pr_cont("\n");
803
804 for (i = 0; i < ports; i++)
805 wanxl_cable_intr(&card->ports[i]); /* get carrier status etc.*/
806
807 return 0;
808 }
809
810 static DEFINE_PCI_DEVICE_TABLE(wanxl_pci_tbl) = {
811 { PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL100, PCI_ANY_ID,
812 PCI_ANY_ID, 0, 0, 0 },
813 { PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL200, PCI_ANY_ID,
814 PCI_ANY_ID, 0, 0, 0 },
815 { PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL400, PCI_ANY_ID,
816 PCI_ANY_ID, 0, 0, 0 },
817 { 0, }
818 };
819
820
821 static struct pci_driver wanxl_pci_driver = {
822 .name = "wanXL",
823 .id_table = wanxl_pci_tbl,
824 .probe = wanxl_pci_init_one,
825 .remove = wanxl_pci_remove_one,
826 };
827
828
829 static int __init wanxl_init_module(void)
830 {
831 #ifdef MODULE
832 pr_info("%s\n", version);
833 #endif
834 return pci_register_driver(&wanxl_pci_driver);
835 }
836
837 static void __exit wanxl_cleanup_module(void)
838 {
839 pci_unregister_driver(&wanxl_pci_driver);
840 }
841
842
843 MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
844 MODULE_DESCRIPTION("SBE Inc. wanXL serial port driver");
845 MODULE_LICENSE("GPL v2");
846 MODULE_DEVICE_TABLE(pci, wanxl_pci_tbl);
847
848 module_init(wanxl_init_module);
849 module_exit(wanxl_cleanup_module);
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