7c26bd2ac11355e9f95ccd6f3e8ea992945618f2
[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  *     TxBitRate        (version >= 1)
318  *     RxBitRate        (version >= 1)
319  *     State            (version >= 1)
320  */       
321 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
322 {
323         char *str, *end, *state_str;
324         int ver, rate_up, rate_down, state;
325
326         if (!card->atmdev[port])
327                 return -ENODEV;
328
329         str = next_string(skb);
330         if (!str)
331                 return -EIO;
332
333         ver = simple_strtol(str, NULL, 10);
334         if (ver < 1) {
335                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
336                          ver);
337                 return -EIO;
338         }
339
340         str = next_string(skb);
341         if (!str)
342                 return -EIO;
343         if (!strcmp(str, "ERROR")) {
344                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
345                          port);
346                 return 0;
347         }
348
349         rate_up = simple_strtol(str, &end, 10);
350         if (*end)
351                 return -EIO;
352
353         str = next_string(skb);
354         if (!str)
355                 return -EIO;
356         rate_down = simple_strtol(str, &end, 10);
357         if (*end)
358                 return -EIO;
359
360         state_str = next_string(skb);
361         if (!state_str)
362                 return -EIO;
363         if (!strcmp(state_str, "Showtime"))
364                 state = ATM_PHY_SIG_FOUND;
365         else {
366                 state = ATM_PHY_SIG_LOST;
367                 release_vccs(card->atmdev[port]);
368         }
369
370         if (state == ATM_PHY_SIG_LOST) {
371                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
372         } else {
373                 char *snr, *attn;
374
375                 snr = next_string(skb);
376                 if (!str)
377                         return -EIO;
378                 attn = next_string(skb);
379                 if (!attn)
380                         return -EIO;
381
382                 dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
383                          port, state_str, rate_down/1000, rate_up/1000,
384                          snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
385         }               
386         card->atmdev[port]->link_rate = rate_down / 424;
387         card->atmdev[port]->signal = state;
388
389         return 0;
390 }
391
392 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
393 {
394         struct solos_param *prm;
395         unsigned long flags;
396         int cmdpid;
397         int found = 0;
398
399         if (skb->len < 7)
400                 return 0;
401
402         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
403             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
404             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
405             skb->data[6] != '\n')
406                 return 0;
407
408         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
409
410         spin_lock_irqsave(&card->param_queue_lock, flags);
411         list_for_each_entry(prm, &card->param_queue, list) {
412                 if (prm->port == port && prm->pid == cmdpid) {
413                         prm->response = skb;
414                         skb_pull(skb, 7);
415                         wake_up(&card->param_wq);
416                         found = 1;
417                         break;
418                 }
419         }
420         spin_unlock_irqrestore(&card->param_queue_lock, flags);
421         return found;
422 }
423
424 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
425                             char *buf)
426 {
427         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
428         struct solos_card *card = atmdev->dev_data;
429         struct sk_buff *skb;
430
431         spin_lock(&card->cli_queue_lock);
432         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
433         spin_unlock(&card->cli_queue_lock);
434         if(skb == NULL)
435                 return sprintf(buf, "No data.\n");
436
437         memcpy(buf, skb->data, skb->len);
438         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
439
440         kfree_skb(skb);
441         return skb->len;
442 }
443
444 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
445 {
446         struct sk_buff *skb;
447         struct pkt_hdr *header;
448
449         if (size > (BUF_SIZE - sizeof(*header))) {
450                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
451                 return 0;
452         }
453         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
454         if (!skb) {
455                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
456                 return 0;
457         }
458
459         header = (void *)skb_put(skb, sizeof(*header));
460
461         header->size = cpu_to_le16(size);
462         header->vpi = cpu_to_le16(0);
463         header->vci = cpu_to_le16(0);
464         header->type = cpu_to_le16(PKT_COMMAND);
465
466         memcpy(skb_put(skb, size), buf, size);
467
468         fpga_queue(card, dev, skb, NULL);
469
470         return 0;
471 }
472
473 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
474                              const char *buf, size_t count)
475 {
476         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
477         struct solos_card *card = atmdev->dev_data;
478         int err;
479
480         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
481
482         return err?:count;
483 }
484
485 static DEVICE_ATTR(console, 0644, console_show, console_store);
486
487
488 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
489 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
490
491 #include "solos-attrlist.c"
492
493 #undef SOLOS_ATTR_RO
494 #undef SOLOS_ATTR_RW
495
496 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
497 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
498
499 static struct attribute *solos_attrs[] = {
500 #include "solos-attrlist.c"
501         NULL
502 };
503
504 static struct attribute_group solos_attr_group = {
505         .attrs = solos_attrs,
506         .name = "parameters",
507 };
508
509 static int flash_upgrade(struct solos_card *card, int chip)
510 {
511         const struct firmware *fw;
512         const char *fw_name;
513         uint32_t data32 = 0;
514         int blocksize = 0;
515         int numblocks = 0;
516         int offset;
517
518         if (chip == 0) {
519                 fw_name = "solos-FPGA.bin";
520                 blocksize = FPGA_BLOCK;
521         } else {
522                 fw_name = "solos-Firmware.bin";
523                 blocksize = SOLOS_BLOCK;
524         }
525
526         if (request_firmware(&fw, fw_name, &card->dev->dev))
527                 return -ENOENT;
528
529         dev_info(&card->dev->dev, "Flash upgrade starting\n");
530
531         numblocks = fw->size / blocksize;
532         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
533         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
534         
535         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
536         iowrite32(1, card->config_regs + FPGA_MODE);
537         data32 = ioread32(card->config_regs + FPGA_MODE); 
538
539         /* Set mode to Chip Erase */
540         dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
541                  chip?"Solos":"FPGA");
542         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
543
544
545         iowrite32(1, card->config_regs + WRITE_FLASH);
546         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
547
548         for (offset = 0; offset < fw->size; offset += blocksize) {
549                 int i;
550
551                 /* Clear write flag */
552                 iowrite32(0, card->config_regs + WRITE_FLASH);
553
554                 /* Set mode to Block Write */
555                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
556                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
557
558                 /* Copy block to buffer, swapping each 16 bits */
559                 for(i = 0; i < blocksize; i += 4) {
560                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
561                         iowrite32(word, RX_BUF(card, 3) + i);
562                 }
563
564                 /* Specify block number and then trigger flash write */
565                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
566                 iowrite32(1, card->config_regs + WRITE_FLASH);
567                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
568         }
569
570         release_firmware(fw);
571         iowrite32(0, card->config_regs + WRITE_FLASH);
572         iowrite32(0, card->config_regs + FPGA_MODE);
573         iowrite32(0, card->config_regs + FLASH_MODE);
574         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
575         return 0;
576 }
577
578 static irqreturn_t solos_irq(int irq, void *dev_id)
579 {
580         struct solos_card *card = dev_id;
581         int handled = 1;
582
583         iowrite32(0, card->config_regs + IRQ_CLEAR);
584
585         /* If we're up and running, just kick the tasklet to process TX/RX */
586         if (card->atmdev[0])
587                 tasklet_schedule(&card->tlet);
588         else
589                 wake_up(&card->fw_wq);
590
591         return IRQ_RETVAL(handled);
592 }
593
594 void solos_bh(unsigned long card_arg)
595 {
596         struct solos_card *card = (void *)card_arg;
597         uint32_t card_flags;
598         uint32_t rx_done = 0;
599         int port;
600
601         /*
602          * Since fpga_tx() is going to need to read the flags under its lock,
603          * it can return them to us so that we don't have to hit PCI MMIO
604          * again for the same information
605          */
606         card_flags = fpga_tx(card);
607
608         for (port = 0; port < card->nr_ports; port++) {
609                 if (card_flags & (0x10 << port)) {
610                         struct pkt_hdr _hdr, *header;
611                         struct sk_buff *skb;
612                         struct atm_vcc *vcc;
613                         int size;
614
615                         if (card->using_dma) {
616                                 skb = card->rx_skb[port];
617                                 card->rx_skb[port] = NULL;
618
619                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
620                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
621
622                                 header = (void *)skb->data;
623                                 size = le16_to_cpu(header->size);
624                                 skb_put(skb, size + sizeof(*header));
625                                 skb_pull(skb, sizeof(*header));
626                         } else {
627                                 header = &_hdr;
628
629                                 rx_done |= 0x10 << port;
630
631                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
632
633                                 size = le16_to_cpu(header->size);
634
635                                 skb = alloc_skb(size + 1, GFP_ATOMIC);
636                                 if (!skb) {
637                                         if (net_ratelimit())
638                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
639                                         continue;
640                                 }
641
642                                 memcpy_fromio(skb_put(skb, size),
643                                               RX_BUF(card, port) + sizeof(*header),
644                                               size);
645                         }
646                         if (atmdebug) {
647                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
648                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
649                                          size, le16_to_cpu(header->vpi),
650                                          le16_to_cpu(header->vci));
651                                 print_buffer(skb);
652                         }
653
654                         switch (le16_to_cpu(header->type)) {
655                         case PKT_DATA:
656                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
657                                                le16_to_cpu(header->vci));
658                                 if (!vcc) {
659                                         if (net_ratelimit())
660                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
661                                                          le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
662                                                          port);
663                                         continue;
664                                 }
665                                 atm_charge(vcc, skb->truesize);
666                                 vcc->push(vcc, skb);
667                                 atomic_inc(&vcc->stats->rx);
668                                 break;
669
670                         case PKT_STATUS:
671                                 if (process_status(card, port, skb) &&
672                                     net_ratelimit()) {
673                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
674                                         print_buffer(skb);
675                                 }
676                                 dev_kfree_skb_any(skb);
677                                 break;
678
679                         case PKT_COMMAND:
680                         default: /* FIXME: Not really, surely? */
681                                 if (process_command(card, port, skb))
682                                         break;
683                                 spin_lock(&card->cli_queue_lock);
684                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
685                                         if (net_ratelimit())
686                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
687                                                          port);
688                                         dev_kfree_skb_any(skb);
689                                 } else
690                                         skb_queue_tail(&card->cli_queue[port], skb);
691                                 spin_unlock(&card->cli_queue_lock);
692                                 break;
693                         }
694                 }
695                 /* Allocate RX skbs for any ports which need them */
696                 if (card->using_dma && card->atmdev[port] &&
697                     !card->rx_skb[port]) {
698                         struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
699                         if (skb) {
700                                 SKB_CB(skb)->dma_addr =
701                                         pci_map_single(card->dev, skb->data,
702                                                        RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
703                                 iowrite32(SKB_CB(skb)->dma_addr,
704                                           card->config_regs + RX_DMA_ADDR(port));
705                                 card->rx_skb[port] = skb;
706                         } else {
707                                 if (net_ratelimit())
708                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
709
710                                 /* We'll have to try again later */
711                                 tasklet_schedule(&card->tlet);
712                         }
713                 }
714         }
715         if (rx_done)
716                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
717
718         return;
719 }
720
721 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
722 {
723         struct hlist_head *head;
724         struct atm_vcc *vcc = NULL;
725         struct hlist_node *node;
726         struct sock *s;
727
728         read_lock(&vcc_sklist_lock);
729         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
730         sk_for_each(s, node, head) {
731                 vcc = atm_sk(s);
732                 if (vcc->dev == dev && vcc->vci == vci &&
733                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
734                         goto out;
735         }
736         vcc = NULL;
737  out:
738         read_unlock(&vcc_sklist_lock);
739         return vcc;
740 }
741
742 static int list_vccs(int vci)
743 {
744         struct hlist_head *head;
745         struct atm_vcc *vcc;
746         struct hlist_node *node;
747         struct sock *s;
748         int num_found = 0;
749         int i;
750
751         read_lock(&vcc_sklist_lock);
752         if (vci != 0){
753                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
754                 sk_for_each(s, node, head) {
755                         num_found ++;
756                         vcc = atm_sk(s);
757                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
758                                vcc->dev->number,
759                                vcc->vpi,
760                                vcc->vci);
761                 }
762         } else {
763                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
764                         head = &vcc_hash[i];
765                         sk_for_each(s, node, head) {
766                                 num_found ++;
767                                 vcc = atm_sk(s);
768                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
769                                        vcc->dev->number,
770                                        vcc->vpi,
771                                        vcc->vci);
772                         }
773                 }
774         }
775         read_unlock(&vcc_sklist_lock);
776         return num_found;
777 }
778
779 static void release_vccs(struct atm_dev *dev)
780 {
781         int i;
782
783         write_lock_irq(&vcc_sklist_lock);
784         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
785                 struct hlist_head *head = &vcc_hash[i];
786                 struct hlist_node *node, *tmp;
787                 struct sock *s;
788                 struct atm_vcc *vcc;
789
790                 sk_for_each_safe(s, node, tmp, head) {
791                         vcc = atm_sk(s);
792                         if (vcc->dev == dev) {
793                                 vcc_release_async(vcc, -EPIPE);
794                                 sk_del_node_init(s);
795                         }
796                 }
797         }
798         write_unlock_irq(&vcc_sklist_lock);
799 }
800
801
802 static int popen(struct atm_vcc *vcc)
803 {
804         struct solos_card *card = vcc->dev->dev_data;
805         struct sk_buff *skb;
806         struct pkt_hdr *header;
807
808         if (vcc->qos.aal != ATM_AAL5) {
809                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
810                          vcc->qos.aal);
811                 return -EINVAL;
812         }
813
814         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
815         if (!skb && net_ratelimit()) {
816                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
817                 return -ENOMEM;
818         }
819         header = (void *)skb_put(skb, sizeof(*header));
820
821         header->size = cpu_to_le16(0);
822         header->vpi = cpu_to_le16(vcc->vpi);
823         header->vci = cpu_to_le16(vcc->vci);
824         header->type = cpu_to_le16(PKT_POPEN);
825
826         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
827
828         set_bit(ATM_VF_ADDR, &vcc->flags);
829         set_bit(ATM_VF_READY, &vcc->flags);
830         list_vccs(0);
831
832
833         return 0;
834 }
835
836 static void pclose(struct atm_vcc *vcc)
837 {
838         struct solos_card *card = vcc->dev->dev_data;
839         struct sk_buff *skb;
840         struct pkt_hdr *header;
841
842         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
843         if (!skb) {
844                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
845                 return;
846         }
847         header = (void *)skb_put(skb, sizeof(*header));
848
849         header->size = cpu_to_le16(0);
850         header->vpi = cpu_to_le16(vcc->vpi);
851         header->vci = cpu_to_le16(vcc->vci);
852         header->type = cpu_to_le16(PKT_PCLOSE);
853
854         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
855
856         clear_bit(ATM_VF_ADDR, &vcc->flags);
857         clear_bit(ATM_VF_READY, &vcc->flags);
858
859         return;
860 }
861
862 static int print_buffer(struct sk_buff *buf)
863 {
864         int len,i;
865         char msg[500];
866         char item[10];
867
868         len = buf->len;
869         for (i = 0; i < len; i++){
870                 if(i % 8 == 0)
871                         sprintf(msg, "%02X: ", i);
872
873                 sprintf(item,"%02X ",*(buf->data + i));
874                 strcat(msg, item);
875                 if(i % 8 == 7) {
876                         sprintf(item, "\n");
877                         strcat(msg, item);
878                         printk(KERN_DEBUG "%s", msg);
879                 }
880         }
881         if (i % 8 != 0) {
882                 sprintf(item, "\n");
883                 strcat(msg, item);
884                 printk(KERN_DEBUG "%s", msg);
885         }
886         printk(KERN_DEBUG "\n");
887
888         return 0;
889 }
890
891 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
892                        struct atm_vcc *vcc)
893 {
894         int old_len;
895         unsigned long flags;
896
897         SKB_CB(skb)->vcc = vcc;
898
899         spin_lock_irqsave(&card->tx_queue_lock, flags);
900         old_len = skb_queue_len(&card->tx_queue[port]);
901         skb_queue_tail(&card->tx_queue[port], skb);
902         if (!old_len)
903                 card->tx_mask |= (1 << port);
904         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
905
906         /* Theoretically we could just schedule the tasklet here, but
907            that introduces latency we don't want -- it's noticeable */
908         if (!old_len)
909                 fpga_tx(card);
910 }
911
912 static uint32_t fpga_tx(struct solos_card *card)
913 {
914         uint32_t tx_pending, card_flags;
915         uint32_t tx_started = 0;
916         struct sk_buff *skb;
917         struct atm_vcc *vcc;
918         unsigned char port;
919         unsigned long flags;
920
921         spin_lock_irqsave(&card->tx_lock, flags);
922         
923         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
924         /*
925          * The queue lock is required for _writing_ to tx_mask, but we're
926          * OK to read it here without locking. The only potential update
927          * that we could race with is in fpga_queue() where it sets a bit
928          * for a new port... but it's going to call this function again if
929          * it's doing that, anyway.
930          */
931         tx_pending = card->tx_mask & ~card_flags;
932
933         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
934                 if (tx_pending & 1) {
935                         struct sk_buff *oldskb = card->tx_skb[port];
936                         if (oldskb)
937                                 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
938                                                  oldskb->len, PCI_DMA_TODEVICE);
939
940                         spin_lock(&card->tx_queue_lock);
941                         skb = skb_dequeue(&card->tx_queue[port]);
942                         if (!skb)
943                                 card->tx_mask &= ~(1 << port);
944                         spin_unlock(&card->tx_queue_lock);
945
946                         if (skb && !card->using_dma) {
947                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
948                                 tx_started |= 1 << port;
949                                 oldskb = skb; /* We're done with this skb already */
950                         } else if (skb && card->using_dma) {
951                                 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
952                                                                        skb->len, PCI_DMA_TODEVICE);
953                                 iowrite32(SKB_CB(skb)->dma_addr,
954                                           card->config_regs + TX_DMA_ADDR(port));
955                         }
956
957                         if (!oldskb)
958                                 continue;
959
960                         /* Clean up and free oldskb now it's gone */
961                         if (atmdebug) {
962                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
963                                          port);
964                                 print_buffer(oldskb);
965                         }
966
967                         vcc = SKB_CB(oldskb)->vcc;
968
969                         if (vcc) {
970                                 atomic_inc(&vcc->stats->tx);
971                                 solos_pop(vcc, oldskb);
972                         } else
973                                 dev_kfree_skb_irq(oldskb);
974
975                 }
976         }
977         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
978         if (tx_started)
979                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
980
981         spin_unlock_irqrestore(&card->tx_lock, flags);
982         return card_flags;
983 }
984
985 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
986 {
987         struct solos_card *card = vcc->dev->dev_data;
988         struct pkt_hdr *header;
989         int pktlen;
990
991         pktlen = skb->len;
992         if (pktlen > (BUF_SIZE - sizeof(*header))) {
993                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
994                 solos_pop(vcc, skb);
995                 return 0;
996         }
997
998         if (!skb_clone_writable(skb, sizeof(*header))) {
999                 int expand_by = 0;
1000                 int ret;
1001
1002                 if (skb_headroom(skb) < sizeof(*header))
1003                         expand_by = sizeof(*header) - skb_headroom(skb);
1004
1005                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1006                 if (ret) {
1007                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1008                         solos_pop(vcc, skb);
1009                         return ret;
1010                 }
1011         }
1012
1013         header = (void *)skb_push(skb, sizeof(*header));
1014
1015         /* This does _not_ include the size of the header */
1016         header->size = cpu_to_le16(pktlen);
1017         header->vpi = cpu_to_le16(vcc->vpi);
1018         header->vci = cpu_to_le16(vcc->vci);
1019         header->type = cpu_to_le16(PKT_DATA);
1020
1021         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1022
1023         return 0;
1024 }
1025
1026 static struct atmdev_ops fpga_ops = {
1027         .open =         popen,
1028         .close =        pclose,
1029         .ioctl =        NULL,
1030         .getsockopt =   NULL,
1031         .setsockopt =   NULL,
1032         .send =         psend,
1033         .send_oam =     NULL,
1034         .phy_put =      NULL,
1035         .phy_get =      NULL,
1036         .change_qos =   NULL,
1037         .proc_read =    NULL,
1038         .owner =        THIS_MODULE
1039 };
1040
1041 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1042 {
1043         int err;
1044         uint16_t fpga_ver;
1045         uint8_t major_ver, minor_ver;
1046         uint32_t data32;
1047         struct solos_card *card;
1048
1049         card = kzalloc(sizeof(*card), GFP_KERNEL);
1050         if (!card)
1051                 return -ENOMEM;
1052
1053         card->dev = dev;
1054         init_waitqueue_head(&card->fw_wq);
1055         init_waitqueue_head(&card->param_wq);
1056
1057         err = pci_enable_device(dev);
1058         if (err) {
1059                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1060                 goto out;
1061         }
1062
1063         err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
1064         if (err) {
1065                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1066                 goto out;
1067         }
1068
1069         err = pci_request_regions(dev, "solos");
1070         if (err) {
1071                 dev_warn(&dev->dev, "Failed to request regions\n");
1072                 goto out;
1073         }
1074
1075         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1076         if (!card->config_regs) {
1077                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1078                 goto out_release_regions;
1079         }
1080         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1081         if (!card->buffers) {
1082                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1083                 goto out_unmap_config;
1084         }
1085
1086         if (reset) {
1087                 iowrite32(1, card->config_regs + FPGA_MODE);
1088                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1089
1090                 iowrite32(0, card->config_regs + FPGA_MODE);
1091                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1092         }
1093
1094         data32 = ioread32(card->config_regs + FPGA_VER);
1095         fpga_ver = (data32 & 0x0000FFFF);
1096         major_ver = ((data32 & 0xFF000000) >> 24);
1097         minor_ver = ((data32 & 0x00FF0000) >> 16);
1098         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1099                  major_ver, minor_ver, fpga_ver);
1100
1101         if (fpga_ver > 27)
1102                 card->using_dma = 1;
1103         else {
1104                 /* Set RX empty flag for all ports */
1105                 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1106         }
1107
1108         card->nr_ports = 2; /* FIXME: Detect daughterboard */
1109
1110         pci_set_drvdata(dev, card);
1111
1112         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1113         spin_lock_init(&card->tx_lock);
1114         spin_lock_init(&card->tx_queue_lock);
1115         spin_lock_init(&card->cli_queue_lock);
1116         spin_lock_init(&card->param_queue_lock);
1117         INIT_LIST_HEAD(&card->param_queue);
1118
1119         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1120                           "solos-pci", card);
1121         if (err) {
1122                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1123                 goto out_unmap_both;
1124         }
1125
1126         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1127
1128         if (fpga_upgrade)
1129                 flash_upgrade(card, 0);
1130
1131         if (firmware_upgrade)
1132                 flash_upgrade(card, 1);
1133
1134         err = atm_init(card);
1135         if (err)
1136                 goto out_free_irq;
1137
1138         return 0;
1139
1140  out_free_irq:
1141         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1142         free_irq(dev->irq, card);
1143         tasklet_kill(&card->tlet);
1144         
1145  out_unmap_both:
1146         pci_set_drvdata(dev, NULL);
1147         pci_iounmap(dev, card->config_regs);
1148  out_unmap_config:
1149         pci_iounmap(dev, card->buffers);
1150  out_release_regions:
1151         pci_release_regions(dev);
1152  out:
1153         return err;
1154 }
1155
1156 static int atm_init(struct solos_card *card)
1157 {
1158         int i;
1159
1160         for (i = 0; i < card->nr_ports; i++) {
1161                 struct sk_buff *skb;
1162                 struct pkt_hdr *header;
1163
1164                 skb_queue_head_init(&card->tx_queue[i]);
1165                 skb_queue_head_init(&card->cli_queue[i]);
1166
1167                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1168                 if (!card->atmdev[i]) {
1169                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1170                         atm_remove(card);
1171                         return -ENODEV;
1172                 }
1173                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1174                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1175                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1176                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1177
1178                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1179
1180                 card->atmdev[i]->ci_range.vpi_bits = 8;
1181                 card->atmdev[i]->ci_range.vci_bits = 16;
1182                 card->atmdev[i]->dev_data = card;
1183                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1184                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1185
1186                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1187                 if (!skb) {
1188                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1189                         continue;
1190                 }
1191
1192                 header = (void *)skb_put(skb, sizeof(*header));
1193
1194                 header->size = cpu_to_le16(0);
1195                 header->vpi = cpu_to_le16(0);
1196                 header->vci = cpu_to_le16(0);
1197                 header->type = cpu_to_le16(PKT_STATUS);
1198
1199                 fpga_queue(card, i, skb, NULL);
1200         }
1201         return 0;
1202 }
1203
1204 static void atm_remove(struct solos_card *card)
1205 {
1206         int i;
1207
1208         for (i = 0; i < card->nr_ports; i++) {
1209                 if (card->atmdev[i]) {
1210                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1211
1212                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1213                         atm_dev_deregister(card->atmdev[i]);
1214                 }
1215         }
1216 }
1217
1218 static void fpga_remove(struct pci_dev *dev)
1219 {
1220         struct solos_card *card = pci_get_drvdata(dev);
1221
1222         atm_remove(card);
1223
1224         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1225         free_irq(dev->irq, card);
1226         tasklet_kill(&card->tlet);
1227
1228         pci_iounmap(dev, card->buffers);
1229         pci_iounmap(dev, card->config_regs);
1230
1231         pci_release_regions(dev);
1232         pci_disable_device(dev);
1233
1234         pci_set_drvdata(dev, NULL);
1235         kfree(card);
1236 }
1237
1238 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1239         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1240         { 0, }
1241 };
1242
1243 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1244
1245 static struct pci_driver fpga_driver = {
1246         .name =         "solos",
1247         .id_table =     fpga_pci_tbl,
1248         .probe =        fpga_probe,
1249         .remove =       fpga_remove,
1250 };
1251
1252
1253 static int __init solos_pci_init(void)
1254 {
1255         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1256         return pci_register_driver(&fpga_driver);
1257 }
1258
1259 static void __exit solos_pci_exit(void)
1260 {
1261         pci_unregister_driver(&fpga_driver);
1262         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1263 }
1264
1265 module_init(solos_pci_init);
1266 module_exit(solos_pci_exit);