Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[pandora-kernel.git] / drivers / atm / solos-pci.c
1 /*
2  * Driver for the Solos PCI ADSL2+ card, designed to support Linux by
3  *  Traverse Technologies -- http://www.traverse.com.au/
4  *  Xrio Limited          -- http://www.xrio.com/
5  *
6  *
7  * Copyright © 2008 Traverse Technologies
8  * Copyright © 2008 Intel Corporation
9  *
10  * Authors: Nathan Williams <nathan@traverse.com.au>
11  *          David Woodhouse <dwmw2@infradead.org>
12  *          Treker Chen <treker@xrio.com>
13  *
14  * This program is free software; you can redistribute it and/or
15  * modify it under the terms of the GNU General Public License
16  * version 2, as published by the Free Software Foundation.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  */
23
24 #define DEBUG
25 #define VERBOSE_DEBUG
26
27 #include <linux/interrupt.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/errno.h>
31 #include <linux/ioport.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/atm.h>
35 #include <linux/atmdev.h>
36 #include <linux/skbuff.h>
37 #include <linux/sysfs.h>
38 #include <linux/device.h>
39 #include <linux/kobject.h>
40 #include <linux/firmware.h>
41 #include <linux/ctype.h>
42 #include <linux/swab.h>
43 #include <linux/slab.h>
44
45 #define VERSION "0.07"
46 #define PTAG "solos-pci"
47
48 #define CONFIG_RAM_SIZE 128
49 #define FLAGS_ADDR      0x7C
50 #define IRQ_EN_ADDR     0x78
51 #define FPGA_VER        0x74
52 #define IRQ_CLEAR       0x70
53 #define WRITE_FLASH     0x6C
54 #define PORTS           0x68
55 #define FLASH_BLOCK     0x64
56 #define FLASH_BUSY      0x60
57 #define FPGA_MODE       0x5C
58 #define FLASH_MODE      0x58
59 #define TX_DMA_ADDR(port)       (0x40 + (4 * (port)))
60 #define RX_DMA_ADDR(port)       (0x30 + (4 * (port)))
61
62 #define DATA_RAM_SIZE   32768
63 #define BUF_SIZE        2048
64 #define OLD_BUF_SIZE    4096 /* For FPGA versions <= 2*/
65 #define FPGA_PAGE       528 /* FPGA flash page size*/
66 #define SOLOS_PAGE      512 /* Solos flash page size*/
67 #define FPGA_BLOCK      (FPGA_PAGE * 8) /* FPGA flash block size*/
68 #define SOLOS_BLOCK     (SOLOS_PAGE * 8) /* Solos flash block size*/
69
70 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
71 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
72 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
73
74 #define RX_DMA_SIZE     2048
75
76 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
77 #define LEGACY_BUFFERS  2
78 #define DMA_SUPPORTED   4
79
80 static int reset = 0;
81 static int atmdebug = 0;
82 static int firmware_upgrade = 0;
83 static int fpga_upgrade = 0;
84 static int db_firmware_upgrade = 0;
85 static int db_fpga_upgrade = 0;
86
87 struct pkt_hdr {
88         __le16 size;
89         __le16 vpi;
90         __le16 vci;
91         __le16 type;
92 };
93
94 struct solos_skb_cb {
95         struct atm_vcc *vcc;
96         uint32_t dma_addr;
97 };
98
99
100 #define SKB_CB(skb)             ((struct solos_skb_cb *)skb->cb)
101
102 #define PKT_DATA        0
103 #define PKT_COMMAND     1
104 #define PKT_POPEN       3
105 #define PKT_PCLOSE      4
106 #define PKT_STATUS      5
107
108 struct solos_card {
109         void __iomem *config_regs;
110         void __iomem *buffers;
111         int nr_ports;
112         int tx_mask;
113         struct pci_dev *dev;
114         struct atm_dev *atmdev[4];
115         struct tasklet_struct tlet;
116         spinlock_t tx_lock;
117         spinlock_t tx_queue_lock;
118         spinlock_t cli_queue_lock;
119         spinlock_t param_queue_lock;
120         struct list_head param_queue;
121         struct sk_buff_head tx_queue[4];
122         struct sk_buff_head cli_queue[4];
123         struct sk_buff *tx_skb[4];
124         struct sk_buff *rx_skb[4];
125         wait_queue_head_t param_wq;
126         wait_queue_head_t fw_wq;
127         int using_dma;
128         int fpga_version;
129         int buffer_size;
130 };
131
132
133 struct solos_param {
134         struct list_head list;
135         pid_t pid;
136         int port;
137         struct sk_buff *response;
138 };
139
140 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
141
142 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
143 MODULE_DESCRIPTION("Solos PCI driver");
144 MODULE_VERSION(VERSION);
145 MODULE_LICENSE("GPL");
146 MODULE_FIRMWARE("solos-FPGA.bin");
147 MODULE_FIRMWARE("solos-Firmware.bin");
148 MODULE_FIRMWARE("solos-db-FPGA.bin");
149 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
150 MODULE_PARM_DESC(atmdebug, "Print ATM data");
151 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
152 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
153 MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
154 MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
155 module_param(reset, int, 0444);
156 module_param(atmdebug, int, 0644);
157 module_param(firmware_upgrade, int, 0444);
158 module_param(fpga_upgrade, int, 0444);
159 module_param(db_firmware_upgrade, int, 0444);
160 module_param(db_fpga_upgrade, int, 0444);
161
162 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
163                        struct atm_vcc *vcc);
164 static uint32_t fpga_tx(struct solos_card *);
165 static irqreturn_t solos_irq(int irq, void *dev_id);
166 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
167 static int list_vccs(int vci);
168 static void release_vccs(struct atm_dev *dev);
169 static int atm_init(struct solos_card *, struct device *);
170 static void atm_remove(struct solos_card *);
171 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
172 static void solos_bh(unsigned long);
173 static int print_buffer(struct sk_buff *buf);
174
175 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
176 {
177         if (vcc->pop)
178                 vcc->pop(vcc, skb);
179         else
180                 dev_kfree_skb_any(skb);
181 }
182
183 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
184                                 char *buf)
185 {
186         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
187         struct solos_card *card = atmdev->dev_data;
188         struct solos_param prm;
189         struct sk_buff *skb;
190         struct pkt_hdr *header;
191         int buflen;
192
193         buflen = strlen(attr->attr.name) + 10;
194
195         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
196         if (!skb) {
197                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
198                 return -ENOMEM;
199         }
200
201         header = (void *)skb_put(skb, sizeof(*header));
202
203         buflen = snprintf((void *)&header[1], buflen - 1,
204                           "L%05d\n%s\n", current->pid, attr->attr.name);
205         skb_put(skb, buflen);
206
207         header->size = cpu_to_le16(buflen);
208         header->vpi = cpu_to_le16(0);
209         header->vci = cpu_to_le16(0);
210         header->type = cpu_to_le16(PKT_COMMAND);
211
212         prm.pid = current->pid;
213         prm.response = NULL;
214         prm.port = SOLOS_CHAN(atmdev);
215
216         spin_lock_irq(&card->param_queue_lock);
217         list_add(&prm.list, &card->param_queue);
218         spin_unlock_irq(&card->param_queue_lock);
219
220         fpga_queue(card, prm.port, skb, NULL);
221
222         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
223
224         spin_lock_irq(&card->param_queue_lock);
225         list_del(&prm.list);
226         spin_unlock_irq(&card->param_queue_lock);
227
228         if (!prm.response)
229                 return -EIO;
230
231         buflen = prm.response->len;
232         memcpy(buf, prm.response->data, buflen);
233         kfree_skb(prm.response);
234
235         return buflen;
236 }
237
238 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
239                                  const char *buf, size_t count)
240 {
241         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
242         struct solos_card *card = atmdev->dev_data;
243         struct solos_param prm;
244         struct sk_buff *skb;
245         struct pkt_hdr *header;
246         int buflen;
247         ssize_t ret;
248
249         buflen = strlen(attr->attr.name) + 11 + count;
250
251         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
252         if (!skb) {
253                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
254                 return -ENOMEM;
255         }
256
257         header = (void *)skb_put(skb, sizeof(*header));
258
259         buflen = snprintf((void *)&header[1], buflen - 1,
260                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
261
262         skb_put(skb, buflen);
263         header->size = cpu_to_le16(buflen);
264         header->vpi = cpu_to_le16(0);
265         header->vci = cpu_to_le16(0);
266         header->type = cpu_to_le16(PKT_COMMAND);
267
268         prm.pid = current->pid;
269         prm.response = NULL;
270         prm.port = SOLOS_CHAN(atmdev);
271
272         spin_lock_irq(&card->param_queue_lock);
273         list_add(&prm.list, &card->param_queue);
274         spin_unlock_irq(&card->param_queue_lock);
275
276         fpga_queue(card, prm.port, skb, NULL);
277
278         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
279
280         spin_lock_irq(&card->param_queue_lock);
281         list_del(&prm.list);
282         spin_unlock_irq(&card->param_queue_lock);
283
284         skb = prm.response;
285
286         if (!skb)
287                 return -EIO;
288
289         buflen = skb->len;
290
291         /* Sometimes it has a newline, sometimes it doesn't. */
292         if (skb->data[buflen - 1] == '\n')
293                 buflen--;
294
295         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
296                 ret = count;
297         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
298                 ret = -EIO;
299         else {
300                 /* We know we have enough space allocated for this; we allocated 
301                    it ourselves */
302                 skb->data[buflen] = 0;
303         
304                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
305                          skb->data);
306                 ret = -EIO;
307         }
308         kfree_skb(skb);
309
310         return ret;
311 }
312
313 static char *next_string(struct sk_buff *skb)
314 {
315         int i = 0;
316         char *this = skb->data;
317         
318         for (i = 0; i < skb->len; i++) {
319                 if (this[i] == '\n') {
320                         this[i] = 0;
321                         skb_pull(skb, i + 1);
322                         return this;
323                 }
324                 if (!isprint(this[i]))
325                         return NULL;
326         }
327         return NULL;
328 }
329
330 /*
331  * Status packet has fields separated by \n, starting with a version number
332  * for the information therein. Fields are....
333  *
334  *     packet version
335  *     RxBitRate        (version >= 1)
336  *     TxBitRate        (version >= 1)
337  *     State            (version >= 1)
338  *     LocalSNRMargin   (version >= 1)
339  *     LocalLineAttn    (version >= 1)
340  */       
341 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
342 {
343         char *str, *end, *state_str, *snr, *attn;
344         int ver, rate_up, rate_down;
345
346         if (!card->atmdev[port])
347                 return -ENODEV;
348
349         str = next_string(skb);
350         if (!str)
351                 return -EIO;
352
353         ver = simple_strtol(str, NULL, 10);
354         if (ver < 1) {
355                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
356                          ver);
357                 return -EIO;
358         }
359
360         str = next_string(skb);
361         if (!str)
362                 return -EIO;
363         if (!strcmp(str, "ERROR")) {
364                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
365                          port);
366                 return 0;
367         }
368
369         rate_down = simple_strtol(str, &end, 10);
370         if (*end)
371                 return -EIO;
372
373         str = next_string(skb);
374         if (!str)
375                 return -EIO;
376         rate_up = simple_strtol(str, &end, 10);
377         if (*end)
378                 return -EIO;
379
380         state_str = next_string(skb);
381         if (!state_str)
382                 return -EIO;
383
384         /* Anything but 'Showtime' is down */
385         if (strcmp(state_str, "Showtime")) {
386                 atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_LOST);
387                 release_vccs(card->atmdev[port]);
388                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
389                 return 0;
390         }
391
392         snr = next_string(skb);
393         if (!snr)
394                 return -EIO;
395         attn = next_string(skb);
396         if (!attn)
397                 return -EIO;
398
399         dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
400                  port, state_str, rate_down/1000, rate_up/1000,
401                  snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
402         
403         card->atmdev[port]->link_rate = rate_down / 424;
404         atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_FOUND);
405
406         return 0;
407 }
408
409 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
410 {
411         struct solos_param *prm;
412         unsigned long flags;
413         int cmdpid;
414         int found = 0;
415
416         if (skb->len < 7)
417                 return 0;
418
419         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
420             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
421             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
422             skb->data[6] != '\n')
423                 return 0;
424
425         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
426
427         spin_lock_irqsave(&card->param_queue_lock, flags);
428         list_for_each_entry(prm, &card->param_queue, list) {
429                 if (prm->port == port && prm->pid == cmdpid) {
430                         prm->response = skb;
431                         skb_pull(skb, 7);
432                         wake_up(&card->param_wq);
433                         found = 1;
434                         break;
435                 }
436         }
437         spin_unlock_irqrestore(&card->param_queue_lock, flags);
438         return found;
439 }
440
441 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
442                             char *buf)
443 {
444         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
445         struct solos_card *card = atmdev->dev_data;
446         struct sk_buff *skb;
447         unsigned int len;
448
449         spin_lock(&card->cli_queue_lock);
450         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
451         spin_unlock(&card->cli_queue_lock);
452         if(skb == NULL)
453                 return sprintf(buf, "No data.\n");
454
455         len = skb->len;
456         memcpy(buf, skb->data, len);
457         dev_dbg(&card->dev->dev, "len: %d\n", len);
458
459         kfree_skb(skb);
460         return len;
461 }
462
463 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
464 {
465         struct sk_buff *skb;
466         struct pkt_hdr *header;
467
468         if (size > (BUF_SIZE - sizeof(*header))) {
469                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
470                 return 0;
471         }
472         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
473         if (!skb) {
474                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
475                 return 0;
476         }
477
478         header = (void *)skb_put(skb, sizeof(*header));
479
480         header->size = cpu_to_le16(size);
481         header->vpi = cpu_to_le16(0);
482         header->vci = cpu_to_le16(0);
483         header->type = cpu_to_le16(PKT_COMMAND);
484
485         memcpy(skb_put(skb, size), buf, size);
486
487         fpga_queue(card, dev, skb, NULL);
488
489         return 0;
490 }
491
492 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
493                              const char *buf, size_t count)
494 {
495         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
496         struct solos_card *card = atmdev->dev_data;
497         int err;
498
499         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
500
501         return err?:count;
502 }
503
504 static DEVICE_ATTR(console, 0644, console_show, console_store);
505
506
507 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
508 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
509
510 #include "solos-attrlist.c"
511
512 #undef SOLOS_ATTR_RO
513 #undef SOLOS_ATTR_RW
514
515 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
516 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
517
518 static struct attribute *solos_attrs[] = {
519 #include "solos-attrlist.c"
520         NULL
521 };
522
523 static struct attribute_group solos_attr_group = {
524         .attrs = solos_attrs,
525         .name = "parameters",
526 };
527
528 static int flash_upgrade(struct solos_card *card, int chip)
529 {
530         const struct firmware *fw;
531         const char *fw_name;
532         uint32_t data32 = 0;
533         int blocksize = 0;
534         int numblocks = 0;
535         int offset;
536
537         switch (chip) {
538         case 0:
539                 fw_name = "solos-FPGA.bin";
540                 blocksize = FPGA_BLOCK;
541                 break;
542         case 1:
543                 fw_name = "solos-Firmware.bin";
544                 blocksize = SOLOS_BLOCK;
545                 break;
546         case 2:
547                 if (card->fpga_version > LEGACY_BUFFERS){
548                         fw_name = "solos-db-FPGA.bin";
549                         blocksize = FPGA_BLOCK;
550                 } else {
551                         dev_info(&card->dev->dev, "FPGA version doesn't support"
552                                         " daughter board upgrades\n");
553                         return -EPERM;
554                 }
555                 break;
556         case 3:
557                 if (card->fpga_version > LEGACY_BUFFERS){
558                         fw_name = "solos-Firmware.bin";
559                         blocksize = SOLOS_BLOCK;
560                 } else {
561                         dev_info(&card->dev->dev, "FPGA version doesn't support"
562                                         " daughter board upgrades\n");
563                         return -EPERM;
564                 }
565                 break;
566         default:
567                 return -ENODEV;
568         }
569
570         if (request_firmware(&fw, fw_name, &card->dev->dev))
571                 return -ENOENT;
572
573         dev_info(&card->dev->dev, "Flash upgrade starting\n");
574
575         numblocks = fw->size / blocksize;
576         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
577         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
578         
579         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
580         iowrite32(1, card->config_regs + FPGA_MODE);
581         data32 = ioread32(card->config_regs + FPGA_MODE); 
582
583         /* Set mode to Chip Erase */
584         if(chip == 0 || chip == 2)
585                 dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
586         if(chip == 1 || chip == 3)
587                 dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
588         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
589
590
591         iowrite32(1, card->config_regs + WRITE_FLASH);
592         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
593
594         for (offset = 0; offset < fw->size; offset += blocksize) {
595                 int i;
596
597                 /* Clear write flag */
598                 iowrite32(0, card->config_regs + WRITE_FLASH);
599
600                 /* Set mode to Block Write */
601                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
602                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
603
604                 /* Copy block to buffer, swapping each 16 bits */
605                 for(i = 0; i < blocksize; i += 4) {
606                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
607                         if(card->fpga_version > LEGACY_BUFFERS)
608                                 iowrite32(word, FLASH_BUF + i);
609                         else
610                                 iowrite32(word, RX_BUF(card, 3) + i);
611                 }
612
613                 /* Specify block number and then trigger flash write */
614                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
615                 iowrite32(1, card->config_regs + WRITE_FLASH);
616                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
617         }
618
619         release_firmware(fw);
620         iowrite32(0, card->config_regs + WRITE_FLASH);
621         iowrite32(0, card->config_regs + FPGA_MODE);
622         iowrite32(0, card->config_regs + FLASH_MODE);
623         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
624         return 0;
625 }
626
627 static irqreturn_t solos_irq(int irq, void *dev_id)
628 {
629         struct solos_card *card = dev_id;
630         int handled = 1;
631
632         iowrite32(0, card->config_regs + IRQ_CLEAR);
633
634         /* If we're up and running, just kick the tasklet to process TX/RX */
635         if (card->atmdev[0])
636                 tasklet_schedule(&card->tlet);
637         else
638                 wake_up(&card->fw_wq);
639
640         return IRQ_RETVAL(handled);
641 }
642
643 void solos_bh(unsigned long card_arg)
644 {
645         struct solos_card *card = (void *)card_arg;
646         uint32_t card_flags;
647         uint32_t rx_done = 0;
648         int port;
649
650         /*
651          * Since fpga_tx() is going to need to read the flags under its lock,
652          * it can return them to us so that we don't have to hit PCI MMIO
653          * again for the same information
654          */
655         card_flags = fpga_tx(card);
656
657         for (port = 0; port < card->nr_ports; port++) {
658                 if (card_flags & (0x10 << port)) {
659                         struct pkt_hdr _hdr, *header;
660                         struct sk_buff *skb;
661                         struct atm_vcc *vcc;
662                         int size;
663
664                         if (card->using_dma) {
665                                 skb = card->rx_skb[port];
666                                 card->rx_skb[port] = NULL;
667
668                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
669                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
670
671                                 header = (void *)skb->data;
672                                 size = le16_to_cpu(header->size);
673                                 skb_put(skb, size + sizeof(*header));
674                                 skb_pull(skb, sizeof(*header));
675                         } else {
676                                 header = &_hdr;
677
678                                 rx_done |= 0x10 << port;
679
680                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
681
682                                 size = le16_to_cpu(header->size);
683                                 if (size > (card->buffer_size - sizeof(*header))){
684                                         dev_warn(&card->dev->dev, "Invalid buffer size\n");
685                                         continue;
686                                 }
687
688                                 skb = alloc_skb(size + 1, GFP_ATOMIC);
689                                 if (!skb) {
690                                         if (net_ratelimit())
691                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
692                                         continue;
693                                 }
694
695                                 memcpy_fromio(skb_put(skb, size),
696                                               RX_BUF(card, port) + sizeof(*header),
697                                               size);
698                         }
699                         if (atmdebug) {
700                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
701                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
702                                          size, le16_to_cpu(header->vpi),
703                                          le16_to_cpu(header->vci));
704                                 print_buffer(skb);
705                         }
706
707                         switch (le16_to_cpu(header->type)) {
708                         case PKT_DATA:
709                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
710                                                le16_to_cpu(header->vci));
711                                 if (!vcc) {
712                                         if (net_ratelimit())
713                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
714                                                          le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
715                                                          port);
716                                         continue;
717                                 }
718                                 atm_charge(vcc, skb->truesize);
719                                 vcc->push(vcc, skb);
720                                 atomic_inc(&vcc->stats->rx);
721                                 break;
722
723                         case PKT_STATUS:
724                                 if (process_status(card, port, skb) &&
725                                     net_ratelimit()) {
726                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
727                                         print_buffer(skb);
728                                 }
729                                 dev_kfree_skb_any(skb);
730                                 break;
731
732                         case PKT_COMMAND:
733                         default: /* FIXME: Not really, surely? */
734                                 if (process_command(card, port, skb))
735                                         break;
736                                 spin_lock(&card->cli_queue_lock);
737                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
738                                         if (net_ratelimit())
739                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
740                                                          port);
741                                         dev_kfree_skb_any(skb);
742                                 } else
743                                         skb_queue_tail(&card->cli_queue[port], skb);
744                                 spin_unlock(&card->cli_queue_lock);
745                                 break;
746                         }
747                 }
748                 /* Allocate RX skbs for any ports which need them */
749                 if (card->using_dma && card->atmdev[port] &&
750                     !card->rx_skb[port]) {
751                         struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
752                         if (skb) {
753                                 SKB_CB(skb)->dma_addr =
754                                         pci_map_single(card->dev, skb->data,
755                                                        RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
756                                 iowrite32(SKB_CB(skb)->dma_addr,
757                                           card->config_regs + RX_DMA_ADDR(port));
758                                 card->rx_skb[port] = skb;
759                         } else {
760                                 if (net_ratelimit())
761                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
762
763                                 /* We'll have to try again later */
764                                 tasklet_schedule(&card->tlet);
765                         }
766                 }
767         }
768         if (rx_done)
769                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
770
771         return;
772 }
773
774 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
775 {
776         struct hlist_head *head;
777         struct atm_vcc *vcc = NULL;
778         struct hlist_node *node;
779         struct sock *s;
780
781         read_lock(&vcc_sklist_lock);
782         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
783         sk_for_each(s, node, head) {
784                 vcc = atm_sk(s);
785                 if (vcc->dev == dev && vcc->vci == vci &&
786                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE &&
787                     test_bit(ATM_VF_READY, &vcc->flags))
788                         goto out;
789         }
790         vcc = NULL;
791  out:
792         read_unlock(&vcc_sklist_lock);
793         return vcc;
794 }
795
796 static int list_vccs(int vci)
797 {
798         struct hlist_head *head;
799         struct atm_vcc *vcc;
800         struct hlist_node *node;
801         struct sock *s;
802         int num_found = 0;
803         int i;
804
805         read_lock(&vcc_sklist_lock);
806         if (vci != 0){
807                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
808                 sk_for_each(s, node, head) {
809                         num_found ++;
810                         vcc = atm_sk(s);
811                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
812                                vcc->dev->number,
813                                vcc->vpi,
814                                vcc->vci);
815                 }
816         } else {
817                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
818                         head = &vcc_hash[i];
819                         sk_for_each(s, node, head) {
820                                 num_found ++;
821                                 vcc = atm_sk(s);
822                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
823                                        vcc->dev->number,
824                                        vcc->vpi,
825                                        vcc->vci);
826                         }
827                 }
828         }
829         read_unlock(&vcc_sklist_lock);
830         return num_found;
831 }
832
833 static void release_vccs(struct atm_dev *dev)
834 {
835         int i;
836
837         write_lock_irq(&vcc_sklist_lock);
838         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
839                 struct hlist_head *head = &vcc_hash[i];
840                 struct hlist_node *node, *tmp;
841                 struct sock *s;
842                 struct atm_vcc *vcc;
843
844                 sk_for_each_safe(s, node, tmp, head) {
845                         vcc = atm_sk(s);
846                         if (vcc->dev == dev) {
847                                 vcc_release_async(vcc, -EPIPE);
848                                 sk_del_node_init(s);
849                         }
850                 }
851         }
852         write_unlock_irq(&vcc_sklist_lock);
853 }
854
855
856 static int popen(struct atm_vcc *vcc)
857 {
858         struct solos_card *card = vcc->dev->dev_data;
859         struct sk_buff *skb;
860         struct pkt_hdr *header;
861
862         if (vcc->qos.aal != ATM_AAL5) {
863                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
864                          vcc->qos.aal);
865                 return -EINVAL;
866         }
867
868         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
869         if (!skb) {
870                 if (net_ratelimit())
871                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
872                 return -ENOMEM;
873         }
874         header = (void *)skb_put(skb, sizeof(*header));
875
876         header->size = cpu_to_le16(0);
877         header->vpi = cpu_to_le16(vcc->vpi);
878         header->vci = cpu_to_le16(vcc->vci);
879         header->type = cpu_to_le16(PKT_POPEN);
880
881         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
882
883         set_bit(ATM_VF_ADDR, &vcc->flags);
884         set_bit(ATM_VF_READY, &vcc->flags);
885         list_vccs(0);
886
887
888         return 0;
889 }
890
891 static void pclose(struct atm_vcc *vcc)
892 {
893         struct solos_card *card = vcc->dev->dev_data;
894         struct sk_buff *skb;
895         struct pkt_hdr *header;
896
897         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
898         if (!skb) {
899                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
900                 return;
901         }
902         header = (void *)skb_put(skb, sizeof(*header));
903
904         header->size = cpu_to_le16(0);
905         header->vpi = cpu_to_le16(vcc->vpi);
906         header->vci = cpu_to_le16(vcc->vci);
907         header->type = cpu_to_le16(PKT_PCLOSE);
908
909         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
910
911         clear_bit(ATM_VF_ADDR, &vcc->flags);
912         clear_bit(ATM_VF_READY, &vcc->flags);
913
914         /* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
915            tasklet has finished processing any incoming packets (and, more to
916            the point, using the vcc pointer). */
917         tasklet_unlock_wait(&card->tlet);
918         return;
919 }
920
921 static int print_buffer(struct sk_buff *buf)
922 {
923         int len,i;
924         char msg[500];
925         char item[10];
926
927         len = buf->len;
928         for (i = 0; i < len; i++){
929                 if(i % 8 == 0)
930                         sprintf(msg, "%02X: ", i);
931
932                 sprintf(item,"%02X ",*(buf->data + i));
933                 strcat(msg, item);
934                 if(i % 8 == 7) {
935                         sprintf(item, "\n");
936                         strcat(msg, item);
937                         printk(KERN_DEBUG "%s", msg);
938                 }
939         }
940         if (i % 8 != 0) {
941                 sprintf(item, "\n");
942                 strcat(msg, item);
943                 printk(KERN_DEBUG "%s", msg);
944         }
945         printk(KERN_DEBUG "\n");
946
947         return 0;
948 }
949
950 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
951                        struct atm_vcc *vcc)
952 {
953         int old_len;
954         unsigned long flags;
955
956         SKB_CB(skb)->vcc = vcc;
957
958         spin_lock_irqsave(&card->tx_queue_lock, flags);
959         old_len = skb_queue_len(&card->tx_queue[port]);
960         skb_queue_tail(&card->tx_queue[port], skb);
961         if (!old_len)
962                 card->tx_mask |= (1 << port);
963         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
964
965         /* Theoretically we could just schedule the tasklet here, but
966            that introduces latency we don't want -- it's noticeable */
967         if (!old_len)
968                 fpga_tx(card);
969 }
970
971 static uint32_t fpga_tx(struct solos_card *card)
972 {
973         uint32_t tx_pending, card_flags;
974         uint32_t tx_started = 0;
975         struct sk_buff *skb;
976         struct atm_vcc *vcc;
977         unsigned char port;
978         unsigned long flags;
979
980         spin_lock_irqsave(&card->tx_lock, flags);
981         
982         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
983         /*
984          * The queue lock is required for _writing_ to tx_mask, but we're
985          * OK to read it here without locking. The only potential update
986          * that we could race with is in fpga_queue() where it sets a bit
987          * for a new port... but it's going to call this function again if
988          * it's doing that, anyway.
989          */
990         tx_pending = card->tx_mask & ~card_flags;
991
992         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
993                 if (tx_pending & 1) {
994                         struct sk_buff *oldskb = card->tx_skb[port];
995                         if (oldskb)
996                                 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
997                                                  oldskb->len, PCI_DMA_TODEVICE);
998
999                         spin_lock(&card->tx_queue_lock);
1000                         skb = skb_dequeue(&card->tx_queue[port]);
1001                         if (!skb)
1002                                 card->tx_mask &= ~(1 << port);
1003                         spin_unlock(&card->tx_queue_lock);
1004
1005                         if (skb && !card->using_dma) {
1006                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
1007                                 tx_started |= 1 << port;
1008                                 oldskb = skb; /* We're done with this skb already */
1009                         } else if (skb && card->using_dma) {
1010                                 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
1011                                                                        skb->len, PCI_DMA_TODEVICE);
1012                                 iowrite32(SKB_CB(skb)->dma_addr,
1013                                           card->config_regs + TX_DMA_ADDR(port));
1014                         }
1015
1016                         if (!oldskb)
1017                                 continue;
1018
1019                         /* Clean up and free oldskb now it's gone */
1020                         if (atmdebug) {
1021                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
1022                                          port);
1023                                 print_buffer(oldskb);
1024                         }
1025
1026                         vcc = SKB_CB(oldskb)->vcc;
1027
1028                         if (vcc) {
1029                                 atomic_inc(&vcc->stats->tx);
1030                                 solos_pop(vcc, oldskb);
1031                         } else
1032                                 dev_kfree_skb_irq(oldskb);
1033
1034                 }
1035         }
1036         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1037         if (tx_started)
1038                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1039
1040         spin_unlock_irqrestore(&card->tx_lock, flags);
1041         return card_flags;
1042 }
1043
1044 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1045 {
1046         struct solos_card *card = vcc->dev->dev_data;
1047         struct pkt_hdr *header;
1048         int pktlen;
1049
1050         pktlen = skb->len;
1051         if (pktlen > (BUF_SIZE - sizeof(*header))) {
1052                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1053                 solos_pop(vcc, skb);
1054                 return 0;
1055         }
1056
1057         if (!skb_clone_writable(skb, sizeof(*header))) {
1058                 int expand_by = 0;
1059                 int ret;
1060
1061                 if (skb_headroom(skb) < sizeof(*header))
1062                         expand_by = sizeof(*header) - skb_headroom(skb);
1063
1064                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1065                 if (ret) {
1066                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1067                         solos_pop(vcc, skb);
1068                         return ret;
1069                 }
1070         }
1071
1072         header = (void *)skb_push(skb, sizeof(*header));
1073
1074         /* This does _not_ include the size of the header */
1075         header->size = cpu_to_le16(pktlen);
1076         header->vpi = cpu_to_le16(vcc->vpi);
1077         header->vci = cpu_to_le16(vcc->vci);
1078         header->type = cpu_to_le16(PKT_DATA);
1079
1080         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1081
1082         return 0;
1083 }
1084
1085 static struct atmdev_ops fpga_ops = {
1086         .open =         popen,
1087         .close =        pclose,
1088         .ioctl =        NULL,
1089         .getsockopt =   NULL,
1090         .setsockopt =   NULL,
1091         .send =         psend,
1092         .send_oam =     NULL,
1093         .phy_put =      NULL,
1094         .phy_get =      NULL,
1095         .change_qos =   NULL,
1096         .proc_read =    NULL,
1097         .owner =        THIS_MODULE
1098 };
1099
1100 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1101 {
1102         int err;
1103         uint16_t fpga_ver;
1104         uint8_t major_ver, minor_ver;
1105         uint32_t data32;
1106         struct solos_card *card;
1107
1108         card = kzalloc(sizeof(*card), GFP_KERNEL);
1109         if (!card)
1110                 return -ENOMEM;
1111
1112         card->dev = dev;
1113         init_waitqueue_head(&card->fw_wq);
1114         init_waitqueue_head(&card->param_wq);
1115
1116         err = pci_enable_device(dev);
1117         if (err) {
1118                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1119                 goto out;
1120         }
1121
1122         err = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
1123         if (err) {
1124                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1125                 goto out;
1126         }
1127
1128         err = pci_request_regions(dev, "solos");
1129         if (err) {
1130                 dev_warn(&dev->dev, "Failed to request regions\n");
1131                 goto out;
1132         }
1133
1134         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1135         if (!card->config_regs) {
1136                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1137                 goto out_release_regions;
1138         }
1139         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1140         if (!card->buffers) {
1141                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1142                 goto out_unmap_config;
1143         }
1144
1145         if (reset) {
1146                 iowrite32(1, card->config_regs + FPGA_MODE);
1147                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1148
1149                 iowrite32(0, card->config_regs + FPGA_MODE);
1150                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1151         }
1152
1153         data32 = ioread32(card->config_regs + FPGA_VER);
1154         fpga_ver = (data32 & 0x0000FFFF);
1155         major_ver = ((data32 & 0xFF000000) >> 24);
1156         minor_ver = ((data32 & 0x00FF0000) >> 16);
1157         card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1158         if (card->fpga_version > LEGACY_BUFFERS)
1159                 card->buffer_size = BUF_SIZE;
1160         else
1161                 card->buffer_size = OLD_BUF_SIZE;
1162         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1163                  major_ver, minor_ver, fpga_ver);
1164
1165         if (fpga_ver < 37 && (fpga_upgrade || firmware_upgrade ||
1166                               db_fpga_upgrade || db_firmware_upgrade)) {
1167                 dev_warn(&dev->dev,
1168                          "FPGA too old; cannot upgrade flash. Use JTAG.\n");
1169                 fpga_upgrade = firmware_upgrade = 0;
1170                 db_fpga_upgrade = db_firmware_upgrade = 0;
1171         }
1172
1173         if (card->fpga_version >= DMA_SUPPORTED){
1174                 card->using_dma = 1;
1175         } else {
1176                 card->using_dma = 0;
1177                 /* Set RX empty flag for all ports */
1178                 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1179         }
1180
1181         data32 = ioread32(card->config_regs + PORTS);
1182         card->nr_ports = (data32 & 0x000000FF);
1183
1184         pci_set_drvdata(dev, card);
1185
1186         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1187         spin_lock_init(&card->tx_lock);
1188         spin_lock_init(&card->tx_queue_lock);
1189         spin_lock_init(&card->cli_queue_lock);
1190         spin_lock_init(&card->param_queue_lock);
1191         INIT_LIST_HEAD(&card->param_queue);
1192
1193         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1194                           "solos-pci", card);
1195         if (err) {
1196                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1197                 goto out_unmap_both;
1198         }
1199
1200         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1201
1202         if (fpga_upgrade)
1203                 flash_upgrade(card, 0);
1204
1205         if (firmware_upgrade)
1206                 flash_upgrade(card, 1);
1207
1208         if (db_fpga_upgrade)
1209                 flash_upgrade(card, 2);
1210
1211         if (db_firmware_upgrade)
1212                 flash_upgrade(card, 3);
1213
1214         err = atm_init(card, &dev->dev);
1215         if (err)
1216                 goto out_free_irq;
1217
1218         return 0;
1219
1220  out_free_irq:
1221         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1222         free_irq(dev->irq, card);
1223         tasklet_kill(&card->tlet);
1224         
1225  out_unmap_both:
1226         pci_set_drvdata(dev, NULL);
1227         pci_iounmap(dev, card->config_regs);
1228  out_unmap_config:
1229         pci_iounmap(dev, card->buffers);
1230  out_release_regions:
1231         pci_release_regions(dev);
1232  out:
1233         kfree(card);
1234         return err;
1235 }
1236
1237 static int atm_init(struct solos_card *card, struct device *parent)
1238 {
1239         int i;
1240
1241         for (i = 0; i < card->nr_ports; i++) {
1242                 struct sk_buff *skb;
1243                 struct pkt_hdr *header;
1244
1245                 skb_queue_head_init(&card->tx_queue[i]);
1246                 skb_queue_head_init(&card->cli_queue[i]);
1247
1248                 card->atmdev[i] = atm_dev_register("solos-pci", parent, &fpga_ops, -1, NULL);
1249                 if (!card->atmdev[i]) {
1250                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1251                         atm_remove(card);
1252                         return -ENODEV;
1253                 }
1254                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1255                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1256                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1257                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1258
1259                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1260
1261                 card->atmdev[i]->ci_range.vpi_bits = 8;
1262                 card->atmdev[i]->ci_range.vci_bits = 16;
1263                 card->atmdev[i]->dev_data = card;
1264                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1265                 atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_UNKNOWN);
1266
1267                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1268                 if (!skb) {
1269                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1270                         continue;
1271                 }
1272
1273                 header = (void *)skb_put(skb, sizeof(*header));
1274
1275                 header->size = cpu_to_le16(0);
1276                 header->vpi = cpu_to_le16(0);
1277                 header->vci = cpu_to_le16(0);
1278                 header->type = cpu_to_le16(PKT_STATUS);
1279
1280                 fpga_queue(card, i, skb, NULL);
1281         }
1282         return 0;
1283 }
1284
1285 static void atm_remove(struct solos_card *card)
1286 {
1287         int i;
1288
1289         for (i = 0; i < card->nr_ports; i++) {
1290                 if (card->atmdev[i]) {
1291                         struct sk_buff *skb;
1292
1293                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1294
1295                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1296                         atm_dev_deregister(card->atmdev[i]);
1297
1298                         skb = card->rx_skb[i];
1299                         if (skb) {
1300                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1301                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
1302                                 dev_kfree_skb(skb);
1303                         }
1304                         skb = card->tx_skb[i];
1305                         if (skb) {
1306                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1307                                                  skb->len, PCI_DMA_TODEVICE);
1308                                 dev_kfree_skb(skb);
1309                         }
1310                         while ((skb = skb_dequeue(&card->tx_queue[i])))
1311                                 dev_kfree_skb(skb);
1312  
1313                 }
1314         }
1315 }
1316
1317 static void fpga_remove(struct pci_dev *dev)
1318 {
1319         struct solos_card *card = pci_get_drvdata(dev);
1320         
1321         /* Disable IRQs */
1322         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1323
1324         /* Reset FPGA */
1325         iowrite32(1, card->config_regs + FPGA_MODE);
1326         (void)ioread32(card->config_regs + FPGA_MODE); 
1327
1328         atm_remove(card);
1329
1330         free_irq(dev->irq, card);
1331         tasklet_kill(&card->tlet);
1332
1333         /* Release device from reset */
1334         iowrite32(0, card->config_regs + FPGA_MODE);
1335         (void)ioread32(card->config_regs + FPGA_MODE); 
1336
1337         pci_iounmap(dev, card->buffers);
1338         pci_iounmap(dev, card->config_regs);
1339
1340         pci_release_regions(dev);
1341         pci_disable_device(dev);
1342
1343         pci_set_drvdata(dev, NULL);
1344         kfree(card);
1345 }
1346
1347 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1348         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1349         { 0, }
1350 };
1351
1352 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1353
1354 static struct pci_driver fpga_driver = {
1355         .name =         "solos",
1356         .id_table =     fpga_pci_tbl,
1357         .probe =        fpga_probe,
1358         .remove =       fpga_remove,
1359 };
1360
1361
1362 static int __init solos_pci_init(void)
1363 {
1364         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1365         return pci_register_driver(&fpga_driver);
1366 }
1367
1368 static void __exit solos_pci_exit(void)
1369 {
1370         pci_unregister_driver(&fpga_driver);
1371         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1372 }
1373
1374 module_init(solos_pci_init);
1375 module_exit(solos_pci_exit);