solos: Swap upstream/downstream rates in status packet, clean up some more
[linux-2.6.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
44 #define VERSION "0.07"
45 #define PTAG "solos-pci"
46
47 #define CONFIG_RAM_SIZE 128
48 #define FLAGS_ADDR      0x7C
49 #define IRQ_EN_ADDR     0x78
50 #define FPGA_VER        0x74
51 #define IRQ_CLEAR       0x70
52 #define WRITE_FLASH     0x6C
53 #define PORTS           0x68
54 #define FLASH_BLOCK     0x64
55 #define FLASH_BUSY      0x60
56 #define FPGA_MODE       0x5C
57 #define FLASH_MODE      0x58
58 #define TX_DMA_ADDR(port)       (0x40 + (4 * (port)))
59 #define RX_DMA_ADDR(port)       (0x30 + (4 * (port)))
60
61 #define DATA_RAM_SIZE   32768
62 #define BUF_SIZE        4096
63 #define FPGA_PAGE       528 /* FPGA flash page size*/
64 #define SOLOS_PAGE      512 /* Solos flash page size*/
65 #define FPGA_BLOCK      (FPGA_PAGE * 8) /* FPGA flash block size*/
66 #define SOLOS_BLOCK     (SOLOS_PAGE * 8) /* Solos flash block size*/
67
68 #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
69 #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
70
71 #define RX_DMA_SIZE     2048
72
73 static int reset = 0;
74 static int atmdebug = 0;
75 static int firmware_upgrade = 0;
76 static int fpga_upgrade = 0;
77
78 struct pkt_hdr {
79         __le16 size;
80         __le16 vpi;
81         __le16 vci;
82         __le16 type;
83 };
84
85 struct solos_skb_cb {
86         struct atm_vcc *vcc;
87         uint32_t dma_addr;
88 };
89
90
91 #define SKB_CB(skb)             ((struct solos_skb_cb *)skb->cb)
92
93 #define PKT_DATA        0
94 #define PKT_COMMAND     1
95 #define PKT_POPEN       3
96 #define PKT_PCLOSE      4
97 #define PKT_STATUS      5
98
99 struct solos_card {
100         void __iomem *config_regs;
101         void __iomem *buffers;
102         int nr_ports;
103         int tx_mask;
104         struct pci_dev *dev;
105         struct atm_dev *atmdev[4];
106         struct tasklet_struct tlet;
107         spinlock_t tx_lock;
108         spinlock_t tx_queue_lock;
109         spinlock_t cli_queue_lock;
110         spinlock_t param_queue_lock;
111         struct list_head param_queue;
112         struct sk_buff_head tx_queue[4];
113         struct sk_buff_head cli_queue[4];
114         struct sk_buff *tx_skb[4];
115         struct sk_buff *rx_skb[4];
116         wait_queue_head_t param_wq;
117         wait_queue_head_t fw_wq;
118         int using_dma;
119 };
120
121
122 struct solos_param {
123         struct list_head list;
124         pid_t pid;
125         int port;
126         struct sk_buff *response;
127 };
128
129 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
130
131 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
132 MODULE_DESCRIPTION("Solos PCI driver");
133 MODULE_VERSION(VERSION);
134 MODULE_LICENSE("GPL");
135 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
136 MODULE_PARM_DESC(atmdebug, "Print ATM data");
137 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
138 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
139 module_param(reset, int, 0444);
140 module_param(atmdebug, int, 0644);
141 module_param(firmware_upgrade, int, 0444);
142 module_param(fpga_upgrade, int, 0444);
143
144 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
145                        struct atm_vcc *vcc);
146 static uint32_t fpga_tx(struct solos_card *);
147 static irqreturn_t solos_irq(int irq, void *dev_id);
148 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
149 static int list_vccs(int vci);
150 static void release_vccs(struct atm_dev *dev);
151 static int atm_init(struct solos_card *);
152 static void atm_remove(struct solos_card *);
153 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
154 static void solos_bh(unsigned long);
155 static int print_buffer(struct sk_buff *buf);
156
157 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
158 {
159         if (vcc->pop)
160                 vcc->pop(vcc, skb);
161         else
162                 dev_kfree_skb_any(skb);
163 }
164
165 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
166                                 char *buf)
167 {
168         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
169         struct solos_card *card = atmdev->dev_data;
170         struct solos_param prm;
171         struct sk_buff *skb;
172         struct pkt_hdr *header;
173         int buflen;
174
175         buflen = strlen(attr->attr.name) + 10;
176
177         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
178         if (!skb) {
179                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
180                 return -ENOMEM;
181         }
182
183         header = (void *)skb_put(skb, sizeof(*header));
184
185         buflen = snprintf((void *)&header[1], buflen - 1,
186                           "L%05d\n%s\n", current->pid, attr->attr.name);
187         skb_put(skb, buflen);
188
189         header->size = cpu_to_le16(buflen);
190         header->vpi = cpu_to_le16(0);
191         header->vci = cpu_to_le16(0);
192         header->type = cpu_to_le16(PKT_COMMAND);
193
194         prm.pid = current->pid;
195         prm.response = NULL;
196         prm.port = SOLOS_CHAN(atmdev);
197
198         spin_lock_irq(&card->param_queue_lock);
199         list_add(&prm.list, &card->param_queue);
200         spin_unlock_irq(&card->param_queue_lock);
201
202         fpga_queue(card, prm.port, skb, NULL);
203
204         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
205
206         spin_lock_irq(&card->param_queue_lock);
207         list_del(&prm.list);
208         spin_unlock_irq(&card->param_queue_lock);
209
210         if (!prm.response)
211                 return -EIO;
212
213         buflen = prm.response->len;
214         memcpy(buf, prm.response->data, buflen);
215         kfree_skb(prm.response);
216
217         return buflen;
218 }
219
220 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
221                                  const char *buf, size_t count)
222 {
223         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
224         struct solos_card *card = atmdev->dev_data;
225         struct solos_param prm;
226         struct sk_buff *skb;
227         struct pkt_hdr *header;
228         int buflen;
229         ssize_t ret;
230
231         buflen = strlen(attr->attr.name) + 11 + count;
232
233         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
234         if (!skb) {
235                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
236                 return -ENOMEM;
237         }
238
239         header = (void *)skb_put(skb, sizeof(*header));
240
241         buflen = snprintf((void *)&header[1], buflen - 1,
242                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
243
244         skb_put(skb, buflen);
245         header->size = cpu_to_le16(buflen);
246         header->vpi = cpu_to_le16(0);
247         header->vci = cpu_to_le16(0);
248         header->type = cpu_to_le16(PKT_COMMAND);
249
250         prm.pid = current->pid;
251         prm.response = NULL;
252         prm.port = SOLOS_CHAN(atmdev);
253
254         spin_lock_irq(&card->param_queue_lock);
255         list_add(&prm.list, &card->param_queue);
256         spin_unlock_irq(&card->param_queue_lock);
257
258         fpga_queue(card, prm.port, skb, NULL);
259
260         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
261
262         spin_lock_irq(&card->param_queue_lock);
263         list_del(&prm.list);
264         spin_unlock_irq(&card->param_queue_lock);
265
266         skb = prm.response;
267
268         if (!skb)
269                 return -EIO;
270
271         buflen = skb->len;
272
273         /* Sometimes it has a newline, sometimes it doesn't. */
274         if (skb->data[buflen - 1] == '\n')
275                 buflen--;
276
277         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
278                 ret = count;
279         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
280                 ret = -EIO;
281         else {
282                 /* We know we have enough space allocated for this; we allocated 
283                    it ourselves */
284                 skb->data[buflen] = 0;
285         
286                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
287                          skb->data);
288                 ret = -EIO;
289         }
290         kfree_skb(skb);
291
292         return ret;
293 }
294
295 static char *next_string(struct sk_buff *skb)
296 {
297         int i = 0;
298         char *this = skb->data;
299         
300         for (i = 0; i < skb->len; i++) {
301                 if (this[i] == '\n') {
302                         this[i] = 0;
303                         skb_pull(skb, i + 1);
304                         return this;
305                 }
306                 if (!isprint(this[i]))
307                         return NULL;
308         }
309         return NULL;
310 }
311
312 /*
313  * Status packet has fields separated by \n, starting with a version number
314  * for the information therein. Fields are....
315  *
316  *     packet version
317  *     RxBitRate        (version >= 1)
318  *     TxBitRate        (version >= 1)
319  *     State            (version >= 1)
320  *     LocalSNRMargin   (version >= 1)
321  *     LocalLineAttn    (version >= 1)
322  */       
323 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
324 {
325         char *str, *end, *state_str, *snr, *attn;
326         int ver, rate_up, rate_down;
327
328         if (!card->atmdev[port])
329                 return -ENODEV;
330
331         str = next_string(skb);
332         if (!str)
333                 return -EIO;
334
335         ver = simple_strtol(str, NULL, 10);
336         if (ver < 1) {
337                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
338                          ver);
339                 return -EIO;
340         }
341
342         str = next_string(skb);
343         if (!str)
344                 return -EIO;
345         if (!strcmp(str, "ERROR")) {
346                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
347                          port);
348                 return 0;
349         }
350
351         rate_down = simple_strtol(str, &end, 10);
352         if (*end)
353                 return -EIO;
354
355         str = next_string(skb);
356         if (!str)
357                 return -EIO;
358         rate_up = simple_strtol(str, &end, 10);
359         if (*end)
360                 return -EIO;
361
362         state_str = next_string(skb);
363         if (!state_str)
364                 return -EIO;
365
366         /* Anything but 'Showtime' is down */
367         if (strcmp(state_str, "Showtime")) {
368                 card->atmdev[port]->signal = ATM_PHY_SIG_LOST;
369                 release_vccs(card->atmdev[port]);
370                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
371                 return 0;
372         }
373
374         snr = next_string(skb);
375         if (!str)
376                 return -EIO;
377         attn = next_string(skb);
378         if (!attn)
379                 return -EIO;
380
381         dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
382                  port, state_str, rate_down/1000, rate_up/1000,
383                  snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
384         
385         card->atmdev[port]->link_rate = rate_down / 424;
386         card->atmdev[port]->signal = ATM_PHY_SIG_FOUND;
387
388         return 0;
389 }
390
391 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
392 {
393         struct solos_param *prm;
394         unsigned long flags;
395         int cmdpid;
396         int found = 0;
397
398         if (skb->len < 7)
399                 return 0;
400
401         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
402             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
403             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
404             skb->data[6] != '\n')
405                 return 0;
406
407         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
408
409         spin_lock_irqsave(&card->param_queue_lock, flags);
410         list_for_each_entry(prm, &card->param_queue, list) {
411                 if (prm->port == port && prm->pid == cmdpid) {
412                         prm->response = skb;
413                         skb_pull(skb, 7);
414                         wake_up(&card->param_wq);
415                         found = 1;
416                         break;
417                 }
418         }
419         spin_unlock_irqrestore(&card->param_queue_lock, flags);
420         return found;
421 }
422
423 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
424                             char *buf)
425 {
426         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
427         struct solos_card *card = atmdev->dev_data;
428         struct sk_buff *skb;
429
430         spin_lock(&card->cli_queue_lock);
431         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
432         spin_unlock(&card->cli_queue_lock);
433         if(skb == NULL)
434                 return sprintf(buf, "No data.\n");
435
436         memcpy(buf, skb->data, skb->len);
437         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
438
439         kfree_skb(skb);
440         return skb->len;
441 }
442
443 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
444 {
445         struct sk_buff *skb;
446         struct pkt_hdr *header;
447
448         if (size > (BUF_SIZE - sizeof(*header))) {
449                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
450                 return 0;
451         }
452         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
453         if (!skb) {
454                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
455                 return 0;
456         }
457
458         header = (void *)skb_put(skb, sizeof(*header));
459
460         header->size = cpu_to_le16(size);
461         header->vpi = cpu_to_le16(0);
462         header->vci = cpu_to_le16(0);
463         header->type = cpu_to_le16(PKT_COMMAND);
464
465         memcpy(skb_put(skb, size), buf, size);
466
467         fpga_queue(card, dev, skb, NULL);
468
469         return 0;
470 }
471
472 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
473                              const char *buf, size_t count)
474 {
475         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
476         struct solos_card *card = atmdev->dev_data;
477         int err;
478
479         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
480
481         return err?:count;
482 }
483
484 static DEVICE_ATTR(console, 0644, console_show, console_store);
485
486
487 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
488 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
489
490 #include "solos-attrlist.c"
491
492 #undef SOLOS_ATTR_RO
493 #undef SOLOS_ATTR_RW
494
495 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
496 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
497
498 static struct attribute *solos_attrs[] = {
499 #include "solos-attrlist.c"
500         NULL
501 };
502
503 static struct attribute_group solos_attr_group = {
504         .attrs = solos_attrs,
505         .name = "parameters",
506 };
507
508 static int flash_upgrade(struct solos_card *card, int chip)
509 {
510         const struct firmware *fw;
511         const char *fw_name;
512         uint32_t data32 = 0;
513         int blocksize = 0;
514         int numblocks = 0;
515         int offset;
516
517         if (chip == 0) {
518                 fw_name = "solos-FPGA.bin";
519                 blocksize = FPGA_BLOCK;
520         } else {
521                 fw_name = "solos-Firmware.bin";
522                 blocksize = SOLOS_BLOCK;
523         }
524
525         if (request_firmware(&fw, fw_name, &card->dev->dev))
526                 return -ENOENT;
527
528         dev_info(&card->dev->dev, "Flash upgrade starting\n");
529
530         numblocks = fw->size / blocksize;
531         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
532         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
533         
534         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
535         iowrite32(1, card->config_regs + FPGA_MODE);
536         data32 = ioread32(card->config_regs + FPGA_MODE); 
537
538         /* Set mode to Chip Erase */
539         dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
540                  chip?"Solos":"FPGA");
541         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
542
543
544         iowrite32(1, card->config_regs + WRITE_FLASH);
545         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
546
547         for (offset = 0; offset < fw->size; offset += blocksize) {
548                 int i;
549
550                 /* Clear write flag */
551                 iowrite32(0, card->config_regs + WRITE_FLASH);
552
553                 /* Set mode to Block Write */
554                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
555                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
556
557                 /* Copy block to buffer, swapping each 16 bits */
558                 for(i = 0; i < blocksize; i += 4) {
559                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
560                         iowrite32(word, RX_BUF(card, 3) + i);
561                 }
562
563                 /* Specify block number and then trigger flash write */
564                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
565                 iowrite32(1, card->config_regs + WRITE_FLASH);
566                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
567         }
568
569         release_firmware(fw);
570         iowrite32(0, card->config_regs + WRITE_FLASH);
571         iowrite32(0, card->config_regs + FPGA_MODE);
572         iowrite32(0, card->config_regs + FLASH_MODE);
573         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
574         return 0;
575 }
576
577 static irqreturn_t solos_irq(int irq, void *dev_id)
578 {
579         struct solos_card *card = dev_id;
580         int handled = 1;
581
582         iowrite32(0, card->config_regs + IRQ_CLEAR);
583
584         /* If we're up and running, just kick the tasklet to process TX/RX */
585         if (card->atmdev[0])
586                 tasklet_schedule(&card->tlet);
587         else
588                 wake_up(&card->fw_wq);
589
590         return IRQ_RETVAL(handled);
591 }
592
593 void solos_bh(unsigned long card_arg)
594 {
595         struct solos_card *card = (void *)card_arg;
596         uint32_t card_flags;
597         uint32_t rx_done = 0;
598         int port;
599
600         /*
601          * Since fpga_tx() is going to need to read the flags under its lock,
602          * it can return them to us so that we don't have to hit PCI MMIO
603          * again for the same information
604          */
605         card_flags = fpga_tx(card);
606
607         for (port = 0; port < card->nr_ports; port++) {
608                 if (card_flags & (0x10 << port)) {
609                         struct pkt_hdr _hdr, *header;
610                         struct sk_buff *skb;
611                         struct atm_vcc *vcc;
612                         int size;
613
614                         if (card->using_dma) {
615                                 skb = card->rx_skb[port];
616                                 card->rx_skb[port] = NULL;
617
618                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
619                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
620
621                                 header = (void *)skb->data;
622                                 size = le16_to_cpu(header->size);
623                                 skb_put(skb, size + sizeof(*header));
624                                 skb_pull(skb, sizeof(*header));
625                         } else {
626                                 header = &_hdr;
627
628                                 rx_done |= 0x10 << port;
629
630                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
631
632                                 size = le16_to_cpu(header->size);
633
634                                 skb = alloc_skb(size + 1, GFP_ATOMIC);
635                                 if (!skb) {
636                                         if (net_ratelimit())
637                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
638                                         continue;
639                                 }
640
641                                 memcpy_fromio(skb_put(skb, size),
642                                               RX_BUF(card, port) + sizeof(*header),
643                                               size);
644                         }
645                         if (atmdebug) {
646                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
647                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
648                                          size, le16_to_cpu(header->vpi),
649                                          le16_to_cpu(header->vci));
650                                 print_buffer(skb);
651                         }
652
653                         switch (le16_to_cpu(header->type)) {
654                         case PKT_DATA:
655                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
656                                                le16_to_cpu(header->vci));
657                                 if (!vcc) {
658                                         if (net_ratelimit())
659                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
660                                                          le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
661                                                          port);
662                                         continue;
663                                 }
664                                 atm_charge(vcc, skb->truesize);
665                                 vcc->push(vcc, skb);
666                                 atomic_inc(&vcc->stats->rx);
667                                 break;
668
669                         case PKT_STATUS:
670                                 if (process_status(card, port, skb) &&
671                                     net_ratelimit()) {
672                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
673                                         print_buffer(skb);
674                                 }
675                                 dev_kfree_skb_any(skb);
676                                 break;
677
678                         case PKT_COMMAND:
679                         default: /* FIXME: Not really, surely? */
680                                 if (process_command(card, port, skb))
681                                         break;
682                                 spin_lock(&card->cli_queue_lock);
683                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
684                                         if (net_ratelimit())
685                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
686                                                          port);
687                                         dev_kfree_skb_any(skb);
688                                 } else
689                                         skb_queue_tail(&card->cli_queue[port], skb);
690                                 spin_unlock(&card->cli_queue_lock);
691                                 break;
692                         }
693                 }
694                 /* Allocate RX skbs for any ports which need them */
695                 if (card->using_dma && card->atmdev[port] &&
696                     !card->rx_skb[port]) {
697                         struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
698                         if (skb) {
699                                 SKB_CB(skb)->dma_addr =
700                                         pci_map_single(card->dev, skb->data,
701                                                        RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
702                                 iowrite32(SKB_CB(skb)->dma_addr,
703                                           card->config_regs + RX_DMA_ADDR(port));
704                                 card->rx_skb[port] = skb;
705                         } else {
706                                 if (net_ratelimit())
707                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
708
709                                 /* We'll have to try again later */
710                                 tasklet_schedule(&card->tlet);
711                         }
712                 }
713         }
714         if (rx_done)
715                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
716
717         return;
718 }
719
720 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
721 {
722         struct hlist_head *head;
723         struct atm_vcc *vcc = NULL;
724         struct hlist_node *node;
725         struct sock *s;
726
727         read_lock(&vcc_sklist_lock);
728         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
729         sk_for_each(s, node, head) {
730                 vcc = atm_sk(s);
731                 if (vcc->dev == dev && vcc->vci == vci &&
732                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
733                         goto out;
734         }
735         vcc = NULL;
736  out:
737         read_unlock(&vcc_sklist_lock);
738         return vcc;
739 }
740
741 static int list_vccs(int vci)
742 {
743         struct hlist_head *head;
744         struct atm_vcc *vcc;
745         struct hlist_node *node;
746         struct sock *s;
747         int num_found = 0;
748         int i;
749
750         read_lock(&vcc_sklist_lock);
751         if (vci != 0){
752                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
753                 sk_for_each(s, node, head) {
754                         num_found ++;
755                         vcc = atm_sk(s);
756                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
757                                vcc->dev->number,
758                                vcc->vpi,
759                                vcc->vci);
760                 }
761         } else {
762                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
763                         head = &vcc_hash[i];
764                         sk_for_each(s, node, head) {
765                                 num_found ++;
766                                 vcc = atm_sk(s);
767                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
768                                        vcc->dev->number,
769                                        vcc->vpi,
770                                        vcc->vci);
771                         }
772                 }
773         }
774         read_unlock(&vcc_sklist_lock);
775         return num_found;
776 }
777
778 static void release_vccs(struct atm_dev *dev)
779 {
780         int i;
781
782         write_lock_irq(&vcc_sklist_lock);
783         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
784                 struct hlist_head *head = &vcc_hash[i];
785                 struct hlist_node *node, *tmp;
786                 struct sock *s;
787                 struct atm_vcc *vcc;
788
789                 sk_for_each_safe(s, node, tmp, head) {
790                         vcc = atm_sk(s);
791                         if (vcc->dev == dev) {
792                                 vcc_release_async(vcc, -EPIPE);
793                                 sk_del_node_init(s);
794                         }
795                 }
796         }
797         write_unlock_irq(&vcc_sklist_lock);
798 }
799
800
801 static int popen(struct atm_vcc *vcc)
802 {
803         struct solos_card *card = vcc->dev->dev_data;
804         struct sk_buff *skb;
805         struct pkt_hdr *header;
806
807         if (vcc->qos.aal != ATM_AAL5) {
808                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
809                          vcc->qos.aal);
810                 return -EINVAL;
811         }
812
813         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
814         if (!skb && net_ratelimit()) {
815                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
816                 return -ENOMEM;
817         }
818         header = (void *)skb_put(skb, sizeof(*header));
819
820         header->size = cpu_to_le16(0);
821         header->vpi = cpu_to_le16(vcc->vpi);
822         header->vci = cpu_to_le16(vcc->vci);
823         header->type = cpu_to_le16(PKT_POPEN);
824
825         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
826
827         set_bit(ATM_VF_ADDR, &vcc->flags);
828         set_bit(ATM_VF_READY, &vcc->flags);
829         list_vccs(0);
830
831
832         return 0;
833 }
834
835 static void pclose(struct atm_vcc *vcc)
836 {
837         struct solos_card *card = vcc->dev->dev_data;
838         struct sk_buff *skb;
839         struct pkt_hdr *header;
840
841         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
842         if (!skb) {
843                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
844                 return;
845         }
846         header = (void *)skb_put(skb, sizeof(*header));
847
848         header->size = cpu_to_le16(0);
849         header->vpi = cpu_to_le16(vcc->vpi);
850         header->vci = cpu_to_le16(vcc->vci);
851         header->type = cpu_to_le16(PKT_PCLOSE);
852
853         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
854
855         clear_bit(ATM_VF_ADDR, &vcc->flags);
856         clear_bit(ATM_VF_READY, &vcc->flags);
857
858         return;
859 }
860
861 static int print_buffer(struct sk_buff *buf)
862 {
863         int len,i;
864         char msg[500];
865         char item[10];
866
867         len = buf->len;
868         for (i = 0; i < len; i++){
869                 if(i % 8 == 0)
870                         sprintf(msg, "%02X: ", i);
871
872                 sprintf(item,"%02X ",*(buf->data + i));
873                 strcat(msg, item);
874                 if(i % 8 == 7) {
875                         sprintf(item, "\n");
876                         strcat(msg, item);
877                         printk(KERN_DEBUG "%s", msg);
878                 }
879         }
880         if (i % 8 != 0) {
881                 sprintf(item, "\n");
882                 strcat(msg, item);
883                 printk(KERN_DEBUG "%s", msg);
884         }
885         printk(KERN_DEBUG "\n");
886
887         return 0;
888 }
889
890 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
891                        struct atm_vcc *vcc)
892 {
893         int old_len;
894         unsigned long flags;
895
896         SKB_CB(skb)->vcc = vcc;
897
898         spin_lock_irqsave(&card->tx_queue_lock, flags);
899         old_len = skb_queue_len(&card->tx_queue[port]);
900         skb_queue_tail(&card->tx_queue[port], skb);
901         if (!old_len)
902                 card->tx_mask |= (1 << port);
903         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
904
905         /* Theoretically we could just schedule the tasklet here, but
906            that introduces latency we don't want -- it's noticeable */
907         if (!old_len)
908                 fpga_tx(card);
909 }
910
911 static uint32_t fpga_tx(struct solos_card *card)
912 {
913         uint32_t tx_pending, card_flags;
914         uint32_t tx_started = 0;
915         struct sk_buff *skb;
916         struct atm_vcc *vcc;
917         unsigned char port;
918         unsigned long flags;
919
920         spin_lock_irqsave(&card->tx_lock, flags);
921         
922         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
923         /*
924          * The queue lock is required for _writing_ to tx_mask, but we're
925          * OK to read it here without locking. The only potential update
926          * that we could race with is in fpga_queue() where it sets a bit
927          * for a new port... but it's going to call this function again if
928          * it's doing that, anyway.
929          */
930         tx_pending = card->tx_mask & ~card_flags;
931
932         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
933                 if (tx_pending & 1) {
934                         struct sk_buff *oldskb = card->tx_skb[port];
935                         if (oldskb)
936                                 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
937                                                  oldskb->len, PCI_DMA_TODEVICE);
938
939                         spin_lock(&card->tx_queue_lock);
940                         skb = skb_dequeue(&card->tx_queue[port]);
941                         if (!skb)
942                                 card->tx_mask &= ~(1 << port);
943                         spin_unlock(&card->tx_queue_lock);
944
945                         if (skb && !card->using_dma) {
946                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
947                                 tx_started |= 1 << port;
948                                 oldskb = skb; /* We're done with this skb already */
949                         } else if (skb && card->using_dma) {
950                                 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
951                                                                        skb->len, PCI_DMA_TODEVICE);
952                                 iowrite32(SKB_CB(skb)->dma_addr,
953                                           card->config_regs + TX_DMA_ADDR(port));
954                         }
955
956                         if (!oldskb)
957                                 continue;
958
959                         /* Clean up and free oldskb now it's gone */
960                         if (atmdebug) {
961                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
962                                          port);
963                                 print_buffer(oldskb);
964                         }
965
966                         vcc = SKB_CB(oldskb)->vcc;
967
968                         if (vcc) {
969                                 atomic_inc(&vcc->stats->tx);
970                                 solos_pop(vcc, oldskb);
971                         } else
972                                 dev_kfree_skb_irq(oldskb);
973
974                 }
975         }
976         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
977         if (tx_started)
978                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
979
980         spin_unlock_irqrestore(&card->tx_lock, flags);
981         return card_flags;
982 }
983
984 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
985 {
986         struct solos_card *card = vcc->dev->dev_data;
987         struct pkt_hdr *header;
988         int pktlen;
989
990         pktlen = skb->len;
991         if (pktlen > (BUF_SIZE - sizeof(*header))) {
992                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
993                 solos_pop(vcc, skb);
994                 return 0;
995         }
996
997         if (!skb_clone_writable(skb, sizeof(*header))) {
998                 int expand_by = 0;
999                 int ret;
1000
1001                 if (skb_headroom(skb) < sizeof(*header))
1002                         expand_by = sizeof(*header) - skb_headroom(skb);
1003
1004                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1005                 if (ret) {
1006                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1007                         solos_pop(vcc, skb);
1008                         return ret;
1009                 }
1010         }
1011
1012         header = (void *)skb_push(skb, sizeof(*header));
1013
1014         /* This does _not_ include the size of the header */
1015         header->size = cpu_to_le16(pktlen);
1016         header->vpi = cpu_to_le16(vcc->vpi);
1017         header->vci = cpu_to_le16(vcc->vci);
1018         header->type = cpu_to_le16(PKT_DATA);
1019
1020         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1021
1022         return 0;
1023 }
1024
1025 static struct atmdev_ops fpga_ops = {
1026         .open =         popen,
1027         .close =        pclose,
1028         .ioctl =        NULL,
1029         .getsockopt =   NULL,
1030         .setsockopt =   NULL,
1031         .send =         psend,
1032         .send_oam =     NULL,
1033         .phy_put =      NULL,
1034         .phy_get =      NULL,
1035         .change_qos =   NULL,
1036         .proc_read =    NULL,
1037         .owner =        THIS_MODULE
1038 };
1039
1040 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1041 {
1042         int err;
1043         uint16_t fpga_ver;
1044         uint8_t major_ver, minor_ver;
1045         uint32_t data32;
1046         struct solos_card *card;
1047
1048         card = kzalloc(sizeof(*card), GFP_KERNEL);
1049         if (!card)
1050                 return -ENOMEM;
1051
1052         card->dev = dev;
1053         init_waitqueue_head(&card->fw_wq);
1054         init_waitqueue_head(&card->param_wq);
1055
1056         err = pci_enable_device(dev);
1057         if (err) {
1058                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1059                 goto out;
1060         }
1061
1062         err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
1063         if (err) {
1064                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1065                 goto out;
1066         }
1067
1068         err = pci_request_regions(dev, "solos");
1069         if (err) {
1070                 dev_warn(&dev->dev, "Failed to request regions\n");
1071                 goto out;
1072         }
1073
1074         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1075         if (!card->config_regs) {
1076                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1077                 goto out_release_regions;
1078         }
1079         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1080         if (!card->buffers) {
1081                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1082                 goto out_unmap_config;
1083         }
1084
1085         if (reset) {
1086                 iowrite32(1, card->config_regs + FPGA_MODE);
1087                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1088
1089                 iowrite32(0, card->config_regs + FPGA_MODE);
1090                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1091         }
1092
1093         data32 = ioread32(card->config_regs + FPGA_VER);
1094         fpga_ver = (data32 & 0x0000FFFF);
1095         major_ver = ((data32 & 0xFF000000) >> 24);
1096         minor_ver = ((data32 & 0x00FF0000) >> 16);
1097         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1098                  major_ver, minor_ver, fpga_ver);
1099
1100         if (fpga_ver > 27)
1101                 card->using_dma = 1;
1102         else {
1103                 /* Set RX empty flag for all ports */
1104                 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1105         }
1106
1107         card->nr_ports = 2; /* FIXME: Detect daughterboard */
1108
1109         pci_set_drvdata(dev, card);
1110
1111         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1112         spin_lock_init(&card->tx_lock);
1113         spin_lock_init(&card->tx_queue_lock);
1114         spin_lock_init(&card->cli_queue_lock);
1115         spin_lock_init(&card->param_queue_lock);
1116         INIT_LIST_HEAD(&card->param_queue);
1117
1118         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1119                           "solos-pci", card);
1120         if (err) {
1121                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1122                 goto out_unmap_both;
1123         }
1124
1125         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1126
1127         if (fpga_upgrade)
1128                 flash_upgrade(card, 0);
1129
1130         if (firmware_upgrade)
1131                 flash_upgrade(card, 1);
1132
1133         err = atm_init(card);
1134         if (err)
1135                 goto out_free_irq;
1136
1137         return 0;
1138
1139  out_free_irq:
1140         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1141         free_irq(dev->irq, card);
1142         tasklet_kill(&card->tlet);
1143         
1144  out_unmap_both:
1145         pci_set_drvdata(dev, NULL);
1146         pci_iounmap(dev, card->config_regs);
1147  out_unmap_config:
1148         pci_iounmap(dev, card->buffers);
1149  out_release_regions:
1150         pci_release_regions(dev);
1151  out:
1152         return err;
1153 }
1154
1155 static int atm_init(struct solos_card *card)
1156 {
1157         int i;
1158
1159         for (i = 0; i < card->nr_ports; i++) {
1160                 struct sk_buff *skb;
1161                 struct pkt_hdr *header;
1162
1163                 skb_queue_head_init(&card->tx_queue[i]);
1164                 skb_queue_head_init(&card->cli_queue[i]);
1165
1166                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1167                 if (!card->atmdev[i]) {
1168                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1169                         atm_remove(card);
1170                         return -ENODEV;
1171                 }
1172                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1173                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1174                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1175                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1176
1177                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1178
1179                 card->atmdev[i]->ci_range.vpi_bits = 8;
1180                 card->atmdev[i]->ci_range.vci_bits = 16;
1181                 card->atmdev[i]->dev_data = card;
1182                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1183                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1184
1185                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1186                 if (!skb) {
1187                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1188                         continue;
1189                 }
1190
1191                 header = (void *)skb_put(skb, sizeof(*header));
1192
1193                 header->size = cpu_to_le16(0);
1194                 header->vpi = cpu_to_le16(0);
1195                 header->vci = cpu_to_le16(0);
1196                 header->type = cpu_to_le16(PKT_STATUS);
1197
1198                 fpga_queue(card, i, skb, NULL);
1199         }
1200         return 0;
1201 }
1202
1203 static void atm_remove(struct solos_card *card)
1204 {
1205         int i;
1206
1207         for (i = 0; i < card->nr_ports; i++) {
1208                 if (card->atmdev[i]) {
1209                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1210
1211                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1212                         atm_dev_deregister(card->atmdev[i]);
1213                 }
1214         }
1215 }
1216
1217 static void fpga_remove(struct pci_dev *dev)
1218 {
1219         struct solos_card *card = pci_get_drvdata(dev);
1220
1221         atm_remove(card);
1222
1223         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1224         free_irq(dev->irq, card);
1225         tasklet_kill(&card->tlet);
1226
1227         pci_iounmap(dev, card->buffers);
1228         pci_iounmap(dev, card->config_regs);
1229
1230         pci_release_regions(dev);
1231         pci_disable_device(dev);
1232
1233         pci_set_drvdata(dev, NULL);
1234         kfree(card);
1235 }
1236
1237 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1238         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1239         { 0, }
1240 };
1241
1242 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1243
1244 static struct pci_driver fpga_driver = {
1245         .name =         "solos",
1246         .id_table =     fpga_pci_tbl,
1247         .probe =        fpga_probe,
1248         .remove =       fpga_remove,
1249 };
1250
1251
1252 static int __init solos_pci_init(void)
1253 {
1254         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1255         return pci_register_driver(&fpga_driver);
1256 }
1257
1258 static void __exit solos_pci_exit(void)
1259 {
1260         pci_unregister_driver(&fpga_driver);
1261         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1262 }
1263
1264 module_init(solos_pci_init);
1265 module_exit(solos_pci_exit);