Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5

Linux/drivers/atm/solos-pci.c

  1 /*
  2  * Driver for the Solos PCI ADSL2+ card, designed to support Linux by
  3  *  Traverse Technologies -- http://www.traverse.com.au/
  4  *  Xrio Limited          -- http://www.xrio.com/
  5  *
  6  *
  7  * Copyright © 2008 Traverse Technologies
  8  * Copyright © 2008 Intel Corporation
  9  *
 10  * Authors: Nathan Williams <nathan@traverse.com.au>
 11  *          David Woodhouse <dwmw2@infradead.org>
 12  *          Treker Chen <treker@xrio.com>
 13  *
 14  * This program is free software; you can redistribute it and/or
 15  * modify it under the terms of the GNU General Public License
 16  * version 2, as published by the Free Software Foundation.
 17  *
 18  * This program is distributed in the hope that it will be useful,
 19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 21  * GNU General Public License for more details.
 22  */
 23 
 24 #define DEBUG
 25 #define VERBOSE_DEBUG
 26 
 27 #include <linux/interrupt.h>
 28 #include <linux/module.h>
 29 #include <linux/kernel.h>
 30 #include <linux/errno.h>
 31 #include <linux/ioport.h>
 32 #include <linux/types.h>
 33 #include <linux/pci.h>
 34 #include <linux/atm.h>
 35 #include <linux/atmdev.h>
 36 #include <linux/skbuff.h>
 37 #include <linux/sysfs.h>
 38 #include <linux/device.h>
 39 #include <linux/kobject.h>
 40 #include <linux/firmware.h>
 41 #include <linux/ctype.h>
 42 #include <linux/swab.h>
 43 #include <linux/slab.h>
 44 
 45 #define VERSION "1.04"
 46 #define DRIVER_VERSION 0x01
 47 #define PTAG "solos-pci"
 48 
 49 #define CONFIG_RAM_SIZE 128
 50 #define FLAGS_ADDR      0x7C
 51 #define IRQ_EN_ADDR     0x78
 52 #define FPGA_VER        0x74
 53 #define IRQ_CLEAR       0x70
 54 #define WRITE_FLASH     0x6C
 55 #define PORTS           0x68
 56 #define FLASH_BLOCK     0x64
 57 #define FLASH_BUSY      0x60
 58 #define FPGA_MODE       0x5C
 59 #define FLASH_MODE      0x58
 60 #define GPIO_STATUS     0x54
 61 #define DRIVER_VER      0x50
 62 #define TX_DMA_ADDR(port)       (0x40 + (4 * (port)))
 63 #define RX_DMA_ADDR(port)       (0x30 + (4 * (port)))
 64 
 65 #define DATA_RAM_SIZE   32768
 66 #define BUF_SIZE        2048
 67 #define OLD_BUF_SIZE    4096 /* For FPGA versions <= 2*/
 68 /* Old boards use ATMEL AD45DB161D flash */
 69 #define ATMEL_FPGA_PAGE 528 /* FPGA flash page size*/
 70 #define ATMEL_SOLOS_PAGE        512 /* Solos flash page size*/
 71 #define ATMEL_FPGA_BLOCK        (ATMEL_FPGA_PAGE * 8) /* FPGA block size*/
 72 #define ATMEL_SOLOS_BLOCK       (ATMEL_SOLOS_PAGE * 8) /* Solos block size*/
 73 /* Current boards use M25P/M25PE SPI flash */
 74 #define SPI_FLASH_BLOCK (256 * 64)
 75 
 76 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
 77 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
 78 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
 79 
 80 #define RX_DMA_SIZE     2048
 81 
 82 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
 83 #define LEGACY_BUFFERS  2
 84 #define DMA_SUPPORTED   4
 85 
 86 static int reset = 0;
 87 static int atmdebug = 0;
 88 static int firmware_upgrade = 0;
 89 static int fpga_upgrade = 0;
 90 static int db_firmware_upgrade = 0;
 91 static int db_fpga_upgrade = 0;
 92 
 93 struct pkt_hdr {
 94         __le16 size;
 95         __le16 vpi;
 96         __le16 vci;
 97         __le16 type;
 98 };
 99 
100 struct solos_skb_cb {
101         struct atm_vcc *vcc;
102         uint32_t dma_addr;
103 };
104 
105 
106 #define SKB_CB(skb)             ((struct solos_skb_cb *)skb->cb)
107 
108 #define PKT_DATA        0
109 #define PKT_COMMAND     1
110 #define PKT_POPEN       3
111 #define PKT_PCLOSE      4
112 #define PKT_STATUS      5
113 
114 struct solos_card {
115         void __iomem *config_regs;
116         void __iomem *buffers;
117         int nr_ports;
118         int tx_mask;
119         struct pci_dev *dev;
120         struct atm_dev *atmdev[4];
121         struct tasklet_struct tlet;
122         spinlock_t tx_lock;
123         spinlock_t tx_queue_lock;
124         spinlock_t cli_queue_lock;
125         spinlock_t param_queue_lock;
126         struct list_head param_queue;
127         struct sk_buff_head tx_queue[4];
128         struct sk_buff_head cli_queue[4];
129         struct sk_buff *tx_skb[4];
130         struct sk_buff *rx_skb[4];
131         unsigned char *dma_bounce;
132         wait_queue_head_t param_wq;
133         wait_queue_head_t fw_wq;
134         int using_dma;
135         int dma_alignment;
136         int fpga_version;
137         int buffer_size;
138         int atmel_flash;
139 };
140 
141 
142 struct solos_param {
143         struct list_head list;
144         pid_t pid;
145         int port;
146         struct sk_buff *response;
147 };
148 
149 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
150 
151 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
152 MODULE_DESCRIPTION("Solos PCI driver");
153 MODULE_VERSION(VERSION);
154 MODULE_LICENSE("GPL");
155 MODULE_FIRMWARE("solos-FPGA.bin");
156 MODULE_FIRMWARE("solos-Firmware.bin");
157 MODULE_FIRMWARE("solos-db-FPGA.bin");
158 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
159 MODULE_PARM_DESC(atmdebug, "Print ATM data");
160 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
161 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
162 MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
163 MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
164 module_param(reset, int, 0444);
165 module_param(atmdebug, int, 0644);
166 module_param(firmware_upgrade, int, 0444);
167 module_param(fpga_upgrade, int, 0444);
168 module_param(db_firmware_upgrade, int, 0444);
169 module_param(db_fpga_upgrade, int, 0444);
170 
171 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
172                        struct atm_vcc *vcc);
173 static uint32_t fpga_tx(struct solos_card *);
174 static irqreturn_t solos_irq(int irq, void *dev_id);
175 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
176 static int atm_init(struct solos_card *, struct device *);
177 static void atm_remove(struct solos_card *);
178 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
179 static void solos_bh(unsigned long);
180 static int print_buffer(struct sk_buff *buf);
181 
182 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
183 {
184         if (vcc->pop)
185                 vcc->pop(vcc, skb);
186         else
187                 dev_kfree_skb_any(skb);
188 }
189 
190 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
191                                 char *buf)
192 {
193         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
194         struct solos_card *card = atmdev->dev_data;
195         struct solos_param prm;
196         struct sk_buff *skb;
197         struct pkt_hdr *header;
198         int buflen;
199 
200         buflen = strlen(attr->attr.name) + 10;
201 
202         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
203         if (!skb) {
204                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
205                 return -ENOMEM;
206         }
207 
208         header = (void *)skb_put(skb, sizeof(*header));
209 
210         buflen = snprintf((void *)&header[1], buflen - 1,
211                           "L%05d\n%s\n", current->pid, attr->attr.name);
212         skb_put(skb, buflen);
213 
214         header->size = cpu_to_le16(buflen);
215         header->vpi = cpu_to_le16(0);
216         header->vci = cpu_to_le16(0);
217         header->type = cpu_to_le16(PKT_COMMAND);
218 
219         prm.pid = current->pid;
220         prm.response = NULL;
221         prm.port = SOLOS_CHAN(atmdev);
222 
223         spin_lock_irq(&card->param_queue_lock);
224         list_add(&prm.list, &card->param_queue);
225         spin_unlock_irq(&card->param_queue_lock);
226 
227         fpga_queue(card, prm.port, skb, NULL);
228 
229         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
230 
231         spin_lock_irq(&card->param_queue_lock);
232         list_del(&prm.list);
233         spin_unlock_irq(&card->param_queue_lock);
234 
235         if (!prm.response)
236                 return -EIO;
237 
238         buflen = prm.response->len;
239         memcpy(buf, prm.response->data, buflen);
240         kfree_skb(prm.response);
241 
242         return buflen;
243 }
244 
245 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
246                                  const char *buf, size_t count)
247 {
248         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
249         struct solos_card *card = atmdev->dev_data;
250         struct solos_param prm;
251         struct sk_buff *skb;
252         struct pkt_hdr *header;
253         int buflen;
254         ssize_t ret;
255 
256         buflen = strlen(attr->attr.name) + 11 + count;
257 
258         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
259         if (!skb) {
260                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
261                 return -ENOMEM;
262         }
263 
264         header = (void *)skb_put(skb, sizeof(*header));
265 
266         buflen = snprintf((void *)&header[1], buflen - 1,
267                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
268 
269         skb_put(skb, buflen);
270         header->size = cpu_to_le16(buflen);
271         header->vpi = cpu_to_le16(0);
272         header->vci = cpu_to_le16(0);
273         header->type = cpu_to_le16(PKT_COMMAND);
274 
275         prm.pid = current->pid;
276         prm.response = NULL;
277         prm.port = SOLOS_CHAN(atmdev);
278 
279         spin_lock_irq(&card->param_queue_lock);
280         list_add(&prm.list, &card->param_queue);
281         spin_unlock_irq(&card->param_queue_lock);
282 
283         fpga_queue(card, prm.port, skb, NULL);
284 
285         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
286 
287         spin_lock_irq(&card->param_queue_lock);
288         list_del(&prm.list);
289         spin_unlock_irq(&card->param_queue_lock);
290 
291         skb = prm.response;
292 
293         if (!skb)
294                 return -EIO;
295 
296         buflen = skb->len;
297 
298         /* Sometimes it has a newline, sometimes it doesn't. */
299         if (skb->data[buflen - 1] == '\n')
300                 buflen--;
301 
302         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
303                 ret = count;
304         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
305                 ret = -EIO;
306         else {
307                 /* We know we have enough space allocated for this; we allocated 
308                    it ourselves */
309                 skb->data[buflen] = 0;
310         
311                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
312                          skb->data);
313                 ret = -EIO;
314         }
315         kfree_skb(skb);
316 
317         return ret;
318 }
319 
320 static char *next_string(struct sk_buff *skb)
321 {
322         int i = 0;
323         char *this = skb->data;
324         
325         for (i = 0; i < skb->len; i++) {
326                 if (this[i] == '\n') {
327                         this[i] = 0;
328                         skb_pull(skb, i + 1);
329                         return this;
330                 }
331                 if (!isprint(this[i]))
332                         return NULL;
333         }
334         return NULL;
335 }
336 
337 /*
338  * Status packet has fields separated by \n, starting with a version number
339  * for the information therein. Fields are....
340  *
341  *     packet version
342  *     RxBitRate        (version >= 1)
343  *     TxBitRate        (version >= 1)
344  *     State            (version >= 1)
345  *     LocalSNRMargin   (version >= 1)
346  *     LocalLineAttn    (version >= 1)
347  */       
348 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
349 {
350         char *str, *state_str, *snr, *attn;
351         int ver, rate_up, rate_down, err;
352 
353         if (!card->atmdev[port])
354                 return -ENODEV;
355 
356         str = next_string(skb);
357         if (!str)
358                 return -EIO;
359 
360         err = kstrtoint(str, 10, &ver);
361         if (err) {
362                 dev_warn(&card->dev->dev, "Unexpected status interrupt version\n");
363                 return err;
364         }
365         if (ver < 1) {
366                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
367                          ver);
368                 return -EIO;
369         }
370 
371         str = next_string(skb);
372         if (!str)
373                 return -EIO;
374         if (!strcmp(str, "ERROR")) {
375                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
376                          port);
377                 return 0;
378         }
379 
380         err = kstrtoint(str, 10, &rate_down);
381         if (err)
382                 return err;
383 
384         str = next_string(skb);
385         if (!str)
386                 return -EIO;
387         err = kstrtoint(str, 10, &rate_up);
388         if (err)
389                 return err;
390 
391         state_str = next_string(skb);
392         if (!state_str)
393                 return -EIO;
394 
395         /* Anything but 'Showtime' is down */
396         if (strcmp(state_str, "Showtime")) {
397                 atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_LOST);
398                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
399                 return 0;
400         }
401 
402         snr = next_string(skb);
403         if (!snr)
404                 return -EIO;
405         attn = next_string(skb);
406         if (!attn)
407                 return -EIO;
408 
409         dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
410                  port, state_str, rate_down/1000, rate_up/1000,
411                  snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
412         
413         card->atmdev[port]->link_rate = rate_down / 424;
414         atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_FOUND);
415 
416         return 0;
417 }
418 
419 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
420 {
421         struct solos_param *prm;
422         unsigned long flags;
423         int cmdpid;
424         int found = 0, err;
425 
426         if (skb->len < 7)
427                 return 0;
428 
429         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
430             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
431             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
432             skb->data[6] != '\n')
433                 return 0;
434 
435         err = kstrtoint(&skb->data[1], 10, &cmdpid);
436         if (err)
437                 return err;
438 
439         spin_lock_irqsave(&card->param_queue_lock, flags);
440         list_for_each_entry(prm, &card->param_queue, list) {
441                 if (prm->port == port && prm->pid == cmdpid) {
442                         prm->response = skb;
443                         skb_pull(skb, 7);
444                         wake_up(&card->param_wq);
445                         found = 1;
446                         break;
447                 }
448         }
449         spin_unlock_irqrestore(&card->param_queue_lock, flags);
450         return found;
451 }
452 
453 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
454                             char *buf)
455 {
456         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
457         struct solos_card *card = atmdev->dev_data;
458         struct sk_buff *skb;
459         unsigned int len;
460 
461         spin_lock(&card->cli_queue_lock);
462         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
463         spin_unlock(&card->cli_queue_lock);
464         if(skb == NULL)
465                 return sprintf(buf, "No data.\n");
466 
467         len = skb->len;
468         memcpy(buf, skb->data, len);
469 
470         kfree_skb(skb);
471         return len;
472 }
473 
474 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
475 {
476         struct sk_buff *skb;
477         struct pkt_hdr *header;
478 
479         if (size > (BUF_SIZE - sizeof(*header))) {
480                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
481                 return 0;
482         }
483         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
484         if (!skb) {
485                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
486                 return 0;
487         }
488 
489         header = (void *)skb_put(skb, sizeof(*header));
490 
491         header->size = cpu_to_le16(size);
492         header->vpi = cpu_to_le16(0);
493         header->vci = cpu_to_le16(0);
494         header->type = cpu_to_le16(PKT_COMMAND);
495 
496         memcpy(skb_put(skb, size), buf, size);
497 
498         fpga_queue(card, dev, skb, NULL);
499 
500         return 0;
501 }
502 
503 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
504                              const char *buf, size_t count)
505 {
506         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
507         struct solos_card *card = atmdev->dev_data;
508         int err;
509 
510         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
511 
512         return err?:count;
513 }
514 
515 struct geos_gpio_attr {
516         struct device_attribute attr;
517         int offset;
518 };
519 
520 #define SOLOS_GPIO_ATTR(_name, _mode, _show, _store, _offset)   \
521         struct geos_gpio_attr gpio_attr_##_name = {             \
522                 .attr = __ATTR(_name, _mode, _show, _store),    \
523                 .offset = _offset }
524 
525 static ssize_t geos_gpio_store(struct device *dev, struct device_attribute *attr,
526                                const char *buf, size_t count)
527 {
528         struct pci_dev *pdev = to_pci_dev(dev);
529         struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
530         struct solos_card *card = pci_get_drvdata(pdev);
531         uint32_t data32;
532 
533         if (count != 1 && (count != 2 || buf[1] != '\n'))
534                 return -EINVAL;
535 
536         spin_lock_irq(&card->param_queue_lock);
537         data32 = ioread32(card->config_regs + GPIO_STATUS);
538         if (buf[0] == '1') {
539                 data32 |= 1 << gattr->offset;
540                 iowrite32(data32, card->config_regs + GPIO_STATUS);
541         } else if (buf[0] == '') {
542                 data32 &= ~(1 << gattr->offset);
543                 iowrite32(data32, card->config_regs + GPIO_STATUS);
544         } else {
545                 count = -EINVAL;
546         }
547         spin_unlock_irq(&card->param_queue_lock);
548         return count;
549 }
550 
551 static ssize_t geos_gpio_show(struct device *dev, struct device_attribute *attr,
552                               char *buf)
553 {
554         struct pci_dev *pdev = to_pci_dev(dev);
555         struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
556         struct solos_card *card = pci_get_drvdata(pdev);
557         uint32_t data32;
558 
559         data32 = ioread32(card->config_regs + GPIO_STATUS);
560         data32 = (data32 >> gattr->offset) & 1;
561 
562         return sprintf(buf, "%d\n", data32);
563 }
564 
565 static ssize_t hardware_show(struct device *dev, struct device_attribute *attr,
566                              char *buf)
567 {
568         struct pci_dev *pdev = to_pci_dev(dev);
569         struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
570         struct solos_card *card = pci_get_drvdata(pdev);
571         uint32_t data32;
572 
573         data32 = ioread32(card->config_regs + GPIO_STATUS);
574         switch (gattr->offset) {
575         case 0:
576                 /* HardwareVersion */
577                 data32 = data32 & 0x1F;
578                 break;
579         case 1:
580                 /* HardwareVariant */
581                 data32 = (data32 >> 5) & 0x0F;
582                 break;
583         }
584         return sprintf(buf, "%d\n", data32);
585 }
586 
587 static DEVICE_ATTR(console, 0644, console_show, console_store);
588 
589 
590 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
591 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
592 
593 #include "solos-attrlist.c"
594 
595 static SOLOS_GPIO_ATTR(GPIO1, 0644, geos_gpio_show, geos_gpio_store, 9);
596 static SOLOS_GPIO_ATTR(GPIO2, 0644, geos_gpio_show, geos_gpio_store, 10);
597 static SOLOS_GPIO_ATTR(GPIO3, 0644, geos_gpio_show, geos_gpio_store, 11);
598 static SOLOS_GPIO_ATTR(GPIO4, 0644, geos_gpio_show, geos_gpio_store, 12);
599 static SOLOS_GPIO_ATTR(GPIO5, 0644, geos_gpio_show, geos_gpio_store, 13);
600 static SOLOS_GPIO_ATTR(PushButton, 0444, geos_gpio_show, NULL, 14);
601 static SOLOS_GPIO_ATTR(HardwareVersion, 0444, hardware_show, NULL, 0);
602 static SOLOS_GPIO_ATTR(HardwareVariant, 0444, hardware_show, NULL, 1);
603 #undef SOLOS_ATTR_RO
604 #undef SOLOS_ATTR_RW
605 
606 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
607 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
608 
609 static struct attribute *solos_attrs[] = {
610 #include "solos-attrlist.c"
611         NULL
612 };
613 
614 static struct attribute_group solos_attr_group = {
615         .attrs = solos_attrs,
616         .name = "parameters",
617 };
618 
619 static struct attribute *gpio_attrs[] = {
620         &gpio_attr_GPIO1.attr.attr,
621         &gpio_attr_GPIO2.attr.attr,
622         &gpio_attr_GPIO3.attr.attr,
623         &gpio_attr_GPIO4.attr.attr,
624         &gpio_attr_GPIO5.attr.attr,
625         &gpio_attr_PushButton.attr.attr,
626         &gpio_attr_HardwareVersion.attr.attr,
627         &gpio_attr_HardwareVariant.attr.attr,
628         NULL
629 };
630 
631 static struct attribute_group gpio_attr_group = {
632         .attrs = gpio_attrs,
633         .name = "gpio",
634 };
635 
636 static int flash_upgrade(struct solos_card *card, int chip)
637 {
638         const struct firmware *fw;
639         const char *fw_name;
640         int blocksize = 0;
641         int numblocks = 0;
642         int offset;
643 
644         switch (chip) {
645         case 0:
646                 fw_name = "solos-FPGA.bin";
647                 if (card->atmel_flash)
648                         blocksize = ATMEL_FPGA_BLOCK;
649                 else
650                         blocksize = SPI_FLASH_BLOCK;
651                 break;
652         case 1:
653                 fw_name = "solos-Firmware.bin";
654                 if (card->atmel_flash)
655                         blocksize = ATMEL_SOLOS_BLOCK;
656                 else
657                         blocksize = SPI_FLASH_BLOCK;
658                 break;
659         case 2:
660                 if (card->fpga_version > LEGACY_BUFFERS){
661                         fw_name = "solos-db-FPGA.bin";
662                         if (card->atmel_flash)
663                                 blocksize = ATMEL_FPGA_BLOCK;
664                         else
665                                 blocksize = SPI_FLASH_BLOCK;
666                 } else {
667                         dev_info(&card->dev->dev, "FPGA version doesn't support"
668                                         " daughter board upgrades\n");
669                         return -EPERM;
670                 }
671                 break;
672         case 3:
673                 if (card->fpga_version > LEGACY_BUFFERS){
674                         fw_name = "solos-Firmware.bin";
675                         if (card->atmel_flash)
676                                 blocksize = ATMEL_SOLOS_BLOCK;
677                         else
678                                 blocksize = SPI_FLASH_BLOCK;
679                 } else {
680                         dev_info(&card->dev->dev, "FPGA version doesn't support"
681                                         " daughter board upgrades\n");
682                         return -EPERM;
683                 }
684                 break;
685         default:
686                 return -ENODEV;
687         }
688 
689         if (request_firmware(&fw, fw_name, &card->dev->dev))
690                 return -ENOENT;
691 
692         dev_info(&card->dev->dev, "Flash upgrade starting\n");
693 
694         /* New FPGAs require driver version before permitting flash upgrades */
695         iowrite32(DRIVER_VERSION, card->config_regs + DRIVER_VER);
696 
697         numblocks = fw->size / blocksize;
698         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
699         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
700         
701         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
702         iowrite32(1, card->config_regs + FPGA_MODE);
703         (void) ioread32(card->config_regs + FPGA_MODE); 
704 
705         /* Set mode to Chip Erase */
706         if(chip == 0 || chip == 2)
707                 dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
708         if(chip == 1 || chip == 3)
709                 dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
710         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
711 
712 
713         iowrite32(1, card->config_regs + WRITE_FLASH);
714         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
715 
716         for (offset = 0; offset < fw->size; offset += blocksize) {
717                 int i;
718 
719                 /* Clear write flag */
720                 iowrite32(0, card->config_regs + WRITE_FLASH);
721 
722                 /* Set mode to Block Write */
723                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
724                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
725 
726                 /* Copy block to buffer, swapping each 16 bits for Atmel flash */
727                 for(i = 0; i < blocksize; i += 4) {
728                         uint32_t word;
729                         if (card->atmel_flash)
730                                 word = swahb32p((uint32_t *)(fw->data + offset + i));
731                         else
732                                 word = *(uint32_t *)(fw->data + offset + i);
733                         if(card->fpga_version > LEGACY_BUFFERS)
734                                 iowrite32(word, FLASH_BUF + i);
735                         else
736                                 iowrite32(word, RX_BUF(card, 3) + i);
737                 }
738 
739                 /* Specify block number and then trigger flash write */
740                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
741                 iowrite32(1, card->config_regs + WRITE_FLASH);
742                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
743         }
744 
745         release_firmware(fw);
746         iowrite32(0, card->config_regs + WRITE_FLASH);
747         iowrite32(0, card->config_regs + FPGA_MODE);
748         iowrite32(0, card->config_regs + FLASH_MODE);
749         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
750         return 0;
751 }
752 
753 static irqreturn_t solos_irq(int irq, void *dev_id)
754 {
755         struct solos_card *card = dev_id;
756         int handled = 1;
757 
758         iowrite32(0, card->config_regs + IRQ_CLEAR);
759 
760         /* If we're up and running, just kick the tasklet to process TX/RX */
761         if (card->atmdev[0])
762                 tasklet_schedule(&card->tlet);
763         else
764                 wake_up(&card->fw_wq);
765 
766         return IRQ_RETVAL(handled);
767 }
768 
769 static void solos_bh(unsigned long card_arg)
770 {
771         struct solos_card *card = (void *)card_arg;
772         uint32_t card_flags;
773         uint32_t rx_done = 0;
774         int port;
775 
776         /*
777          * Since fpga_tx() is going to need to read the flags under its lock,
778          * it can return them to us so that we don't have to hit PCI MMIO
779          * again for the same information
780          */
781         card_flags = fpga_tx(card);
782 
783         for (port = 0; port < card->nr_ports; port++) {
784                 if (card_flags & (0x10 << port)) {
785                         struct pkt_hdr _hdr, *header;
786                         struct sk_buff *skb;
787                         struct atm_vcc *vcc;
788                         int size;
789 
790                         if (card->using_dma) {
791                                 skb = card->rx_skb[port];
792                                 card->rx_skb[port] = NULL;
793 
794                                 dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
795                                                  RX_DMA_SIZE, DMA_FROM_DEVICE);
796 
797                                 header = (void *)skb->data;
798                                 size = le16_to_cpu(header->size);
799                                 skb_put(skb, size + sizeof(*header));
800                                 skb_pull(skb, sizeof(*header));
801                         } else {
802                                 header = &_hdr;
803 
804                                 rx_done |= 0x10 << port;
805 
806                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
807 
808                                 size = le16_to_cpu(header->size);
809                                 if (size > (card->buffer_size - sizeof(*header))){
810                                         dev_warn(&card->dev->dev, "Invalid buffer size\n");
811                                         continue;
812                                 }
813 
814                                 /* Use netdev_alloc_skb() because it adds NET_SKB_PAD of
815                                  * headroom, and ensures we can route packets back out an
816                                  * Ethernet interface (for example) without having to
817                                  * reallocate. Adding NET_IP_ALIGN also ensures that both
818                                  * PPPoATM and PPPoEoBR2684 packets end up aligned. */
819                                 skb = netdev_alloc_skb_ip_align(NULL, size + 1);
820                                 if (!skb) {
821                                         if (net_ratelimit())
822                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
823                                         continue;
824                                 }
825 
826                                 memcpy_fromio(skb_put(skb, size),
827                                               RX_BUF(card, port) + sizeof(*header),
828                                               size);
829                         }
830                         if (atmdebug) {
831                                 dev_info(&card->dev->dev, "Received: port %d\n", port);
832                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
833                                          size, le16_to_cpu(header->vpi),
834                                          le16_to_cpu(header->vci));
835                                 print_buffer(skb);
836                         }
837 
838                         switch (le16_to_cpu(header->type)) {
839                         case PKT_DATA:
840                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
841                                                le16_to_cpu(header->vci));
842                                 if (!vcc) {
843                                         if (net_ratelimit())
844                                                 dev_warn(&card->dev->dev, "Received packet for unknown VPI.VCI %d.%d on port %d\n",
845                                                          le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
846                                                          port);
847                                         dev_kfree_skb_any(skb);
848                                         break;
849                                 }
850                                 atm_charge(vcc, skb->truesize);
851                                 vcc->push(vcc, skb);
852                                 atomic_inc(&vcc->stats->rx);
853                                 break;
854 
855                         case PKT_STATUS:
856                                 if (process_status(card, port, skb) &&
857                                     net_ratelimit()) {
858                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
859                                         print_buffer(skb);
860                                 }
861                                 dev_kfree_skb_any(skb);
862                                 break;
863 
864                         case PKT_COMMAND:
865                         default: /* FIXME: Not really, surely? */
866                                 if (process_command(card, port, skb))
867                                         break;
868                                 spin_lock(&card->cli_queue_lock);
869                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
870                                         if (net_ratelimit())
871                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
872                                                          port);
873                                         dev_kfree_skb_any(skb);
874                                 } else
875                                         skb_queue_tail(&card->cli_queue[port], skb);
876                                 spin_unlock(&card->cli_queue_lock);
877                                 break;
878                         }
879                 }
880                 /* Allocate RX skbs for any ports which need them */
881                 if (card->using_dma && card->atmdev[port] &&
882                     !card->rx_skb[port]) {
883                         /* Unlike the MMIO case (qv) we can't add NET_IP_ALIGN
884                          * here; the FPGA can only DMA to addresses which are
885                          * aligned to 4 bytes. */
886                         struct sk_buff *skb = dev_alloc_skb(RX_DMA_SIZE);
887                         if (skb) {
888                                 SKB_CB(skb)->dma_addr =
889                                         dma_map_single(&card->dev->dev, skb->data,
890                                                        RX_DMA_SIZE, DMA_FROM_DEVICE);
891                                 iowrite32(SKB_CB(skb)->dma_addr,
892                                           card->config_regs + RX_DMA_ADDR(port));
893                                 card->rx_skb[port] = skb;
894                         } else {
895                                 if (net_ratelimit())
896                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
897 
898                                 /* We'll have to try again later */
899                                 tasklet_schedule(&card->tlet);
900                         }
901                 }
902         }
903         if (rx_done)
904                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
905 
906         return;
907 }
908 
909 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
910 {
911         struct hlist_head *head;
912         struct atm_vcc *vcc = NULL;
913         struct sock *s;
914 
915         read_lock(&vcc_sklist_lock);
916         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
917         sk_for_each(s, head) {
918                 vcc = atm_sk(s);
919                 if (vcc->dev == dev && vcc->vci == vci &&
920                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE &&
921                     test_bit(ATM_VF_READY, &vcc->flags))
922                         goto out;
923         }
924         vcc = NULL;
925  out:
926         read_unlock(&vcc_sklist_lock);
927         return vcc;
928 }
929 
930 static int popen(struct atm_vcc *vcc)
931 {
932         struct solos_card *card = vcc->dev->dev_data;
933         struct sk_buff *skb;
934         struct pkt_hdr *header;
935 
936         if (vcc->qos.aal != ATM_AAL5) {
937                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
938                          vcc->qos.aal);
939                 return -EINVAL;
940         }
941 
942         skb = alloc_skb(sizeof(*header), GFP_KERNEL);
943         if (!skb) {
944                 if (net_ratelimit())
945                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
946                 return -ENOMEM;
947         }
948         header = (void *)skb_put(skb, sizeof(*header));
949 
950         header->size = cpu_to_le16(0);
951         header->vpi = cpu_to_le16(vcc->vpi);
952         header->vci = cpu_to_le16(vcc->vci);
953         header->type = cpu_to_le16(PKT_POPEN);
954 
955         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
956 
957         set_bit(ATM_VF_ADDR, &vcc->flags);
958         set_bit(ATM_VF_READY, &vcc->flags);
959 
960         return 0;
961 }
962 
963 static void pclose(struct atm_vcc *vcc)
964 {
965         struct solos_card *card = vcc->dev->dev_data;
966         unsigned char port = SOLOS_CHAN(vcc->dev);
967         struct sk_buff *skb, *tmpskb;
968         struct pkt_hdr *header;
969 
970         /* Remove any yet-to-be-transmitted packets from the pending queue */
971         spin_lock(&card->tx_queue_lock);
972         skb_queue_walk_safe(&card->tx_queue[port], skb, tmpskb) {
973                 if (SKB_CB(skb)->vcc == vcc) {
974                         skb_unlink(skb, &card->tx_queue[port]);
975                         solos_pop(vcc, skb);
976                 }
977         }
978         spin_unlock(&card->tx_queue_lock);
979 
980         skb = alloc_skb(sizeof(*header), GFP_KERNEL);
981         if (!skb) {
982                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
983                 return;
984         }
985         header = (void *)skb_put(skb, sizeof(*header));
986 
987         header->size = cpu_to_le16(0);
988         header->vpi = cpu_to_le16(vcc->vpi);
989         header->vci = cpu_to_le16(vcc->vci);
990         header->type = cpu_to_le16(PKT_PCLOSE);
991 
992         skb_get(skb);
993         fpga_queue(card, port, skb, NULL);
994 
995         if (!wait_event_timeout(card->param_wq, !skb_shared(skb), 5 * HZ))
996                 dev_warn(&card->dev->dev,
997                          "Timeout waiting for VCC close on port %d\n", port);
998 
999         dev_kfree_skb(skb);
1000 
1001         /* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
1002            tasklet has finished processing any incoming packets (and, more to
1003            the point, using the vcc pointer). */
1004         tasklet_unlock_wait(&card->tlet);
1005 
1006         clear_bit(ATM_VF_ADDR, &vcc->flags);
1007 
1008         return;
1009 }
1010 
1011 static int print_buffer(struct sk_buff *buf)
1012 {
1013         int len,i;
1014         char msg[500];
1015         char item[10];
1016 
1017         len = buf->len;
1018         for (i = 0; i < len; i++){
1019                 if(i % 8 == 0)
1020                         sprintf(msg, "%02X: ", i);
1021 
1022                 sprintf(item,"%02X ",*(buf->data + i));
1023                 strcat(msg, item);
1024                 if(i % 8 == 7) {
1025                         sprintf(item, "\n");
1026                         strcat(msg, item);
1027                         printk(KERN_DEBUG "%s", msg);
1028                 }
1029         }
1030         if (i % 8 != 0) {
1031                 sprintf(item, "\n");
1032                 strcat(msg, item);
1033                 printk(KERN_DEBUG "%s", msg);
1034         }
1035         printk(KERN_DEBUG "\n");
1036 
1037         return 0;
1038 }
1039 
1040 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
1041                        struct atm_vcc *vcc)
1042 {
1043         int old_len;
1044         unsigned long flags;
1045 
1046         SKB_CB(skb)->vcc = vcc;
1047 
1048         spin_lock_irqsave(&card->tx_queue_lock, flags);
1049         old_len = skb_queue_len(&card->tx_queue[port]);
1050         skb_queue_tail(&card->tx_queue[port], skb);
1051         if (!old_len)
1052                 card->tx_mask |= (1 << port);
1053         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
1054 
1055         /* Theoretically we could just schedule the tasklet here, but
1056            that introduces latency we don't want -- it's noticeable */
1057         if (!old_len)
1058                 fpga_tx(card);
1059 }
1060 
1061 static uint32_t fpga_tx(struct solos_card *card)
1062 {
1063         uint32_t tx_pending, card_flags;
1064         uint32_t tx_started = 0;
1065         struct sk_buff *skb;
1066         struct atm_vcc *vcc;
1067         unsigned char port;
1068         unsigned long flags;
1069 
1070         spin_lock_irqsave(&card->tx_lock, flags);
1071         
1072         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
1073         /*
1074          * The queue lock is required for _writing_ to tx_mask, but we're
1075          * OK to read it here without locking. The only potential update
1076          * that we could race with is in fpga_queue() where it sets a bit
1077          * for a new port... but it's going to call this function again if
1078          * it's doing that, anyway.
1079          */
1080         tx_pending = card->tx_mask & ~card_flags;
1081 
1082         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
1083                 if (tx_pending & 1) {
1084                         struct sk_buff *oldskb = card->tx_skb[port];
1085                         if (oldskb) {
1086                                 dma_unmap_single(&card->dev->dev, SKB_CB(oldskb)->dma_addr,
1087                                                  oldskb->len, DMA_TO_DEVICE);
1088                                 card->tx_skb[port] = NULL;
1089                         }
1090                         spin_lock(&card->tx_queue_lock);
1091                         skb = skb_dequeue(&card->tx_queue[port]);
1092                         if (!skb)
1093                                 card->tx_mask &= ~(1 << port);
1094                         spin_unlock(&card->tx_queue_lock);
1095 
1096                         if (skb && !card->using_dma) {
1097                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
1098                                 tx_started |= 1 << port;
1099                                 oldskb = skb; /* We're done with this skb already */
1100                         } else if (skb && card->using_dma) {
1101                                 unsigned char *data = skb->data;
1102                                 if ((unsigned long)data & card->dma_alignment) {
1103                                         data = card->dma_bounce + (BUF_SIZE * port);
1104                                         memcpy(data, skb->data, skb->len);
1105                                 }
1106                                 SKB_CB(skb)->dma_addr = dma_map_single(&card->dev->dev, data,
1107                                                                        skb->len, DMA_TO_DEVICE);
1108                                 card->tx_skb[port] = skb;
1109                                 iowrite32(SKB_CB(skb)->dma_addr,
1110                                           card->config_regs + TX_DMA_ADDR(port));
1111                         }
1112 
1113                         if (!oldskb)
1114                                 continue;
1115 
1116                         /* Clean up and free oldskb now it's gone */
1117                         if (atmdebug) {
1118                                 struct pkt_hdr *header = (void *)oldskb->data;
1119                                 int size = le16_to_cpu(header->size);
1120 
1121                                 skb_pull(oldskb, sizeof(*header));
1122                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
1123                                          port);
1124                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
1125                                          size, le16_to_cpu(header->vpi),
1126                                          le16_to_cpu(header->vci));
1127                                 print_buffer(oldskb);
1128                         }
1129 
1130                         vcc = SKB_CB(oldskb)->vcc;
1131 
1132                         if (vcc) {
1133                                 atomic_inc(&vcc->stats->tx);
1134                                 solos_pop(vcc, oldskb);
1135                         } else {
1136                                 dev_kfree_skb_irq(oldskb);
1137                                 wake_up(&card->param_wq);
1138                         }
1139                 }
1140         }
1141         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1142         if (tx_started)
1143                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1144 
1145         spin_unlock_irqrestore(&card->tx_lock, flags);
1146         return card_flags;
1147 }
1148 
1149 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1150 {
1151         struct solos_card *card = vcc->dev->dev_data;
1152         struct pkt_hdr *header;
1153         int pktlen;
1154 
1155         pktlen = skb->len;
1156         if (pktlen > (BUF_SIZE - sizeof(*header))) {
1157                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1158                 solos_pop(vcc, skb);
1159                 return 0;
1160         }
1161 
1162         if (!skb_clone_writable(skb, sizeof(*header))) {
1163                 int expand_by = 0;
1164                 int ret;
1165 
1166                 if (skb_headroom(skb) < sizeof(*header))
1167                         expand_by = sizeof(*header) - skb_headroom(skb);
1168 
1169                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1170                 if (ret) {
1171                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1172                         solos_pop(vcc, skb);
1173                         return ret;
1174                 }
1175         }
1176 
1177         header = (void *)skb_push(skb, sizeof(*header));
1178 
1179         /* This does _not_ include the size of the header */
1180         header->size = cpu_to_le16(pktlen);
1181         header->vpi = cpu_to_le16(vcc->vpi);
1182         header->vci = cpu_to_le16(vcc->vci);
1183         header->type = cpu_to_le16(PKT_DATA);
1184 
1185         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1186 
1187         return 0;
1188 }
1189 
1190 static struct atmdev_ops fpga_ops = {
1191         .open =         popen,
1192         .close =        pclose,
1193         .ioctl =        NULL,
1194         .getsockopt =   NULL,
1195         .setsockopt =   NULL,
1196         .send =         psend,
1197         .send_oam =     NULL,
1198         .phy_put =      NULL,
1199         .phy_get =      NULL,
1200         .change_qos =   NULL,
1201         .proc_read =    NULL,
1202         .owner =        THIS_MODULE
1203 };
1204 
1205 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1206 {
1207         int err;
1208         uint16_t fpga_ver;
1209         uint8_t major_ver, minor_ver;
1210         uint32_t data32;
1211         struct solos_card *card;
1212 
1213         card = kzalloc(sizeof(*card), GFP_KERNEL);
1214         if (!card)
1215                 return -ENOMEM;
1216 
1217         card->dev = dev;
1218         init_waitqueue_head(&card->fw_wq);
1219         init_waitqueue_head(&card->param_wq);
1220 
1221         err = pci_enable_device(dev);
1222         if (err) {
1223                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1224                 goto out;
1225         }
1226 
1227         err = dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
1228         if (err) {
1229                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1230                 goto out;
1231         }
1232 
1233         err = pci_request_regions(dev, "solos");
1234         if (err) {
1235                 dev_warn(&dev->dev, "Failed to request regions\n");
1236                 goto out;
1237         }
1238 
1239         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1240         if (!card->config_regs) {
1241                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1242                 err = -ENOMEM;
1243                 goto out_release_regions;
1244         }
1245         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1246         if (!card->buffers) {
1247                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1248                 err = -ENOMEM;
1249                 goto out_unmap_config;
1250         }
1251 
1252         if (reset) {
1253                 iowrite32(1, card->config_regs + FPGA_MODE);
1254                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1255 
1256                 iowrite32(0, card->config_regs + FPGA_MODE);
1257                 data32 = ioread32(card->config_regs + FPGA_MODE); 
1258         }
1259 
1260         data32 = ioread32(card->config_regs + FPGA_VER);
1261         fpga_ver = (data32 & 0x0000FFFF);
1262         major_ver = ((data32 & 0xFF000000) >> 24);
1263         minor_ver = ((data32 & 0x00FF0000) >> 16);
1264         card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1265         if (card->fpga_version > LEGACY_BUFFERS)
1266                 card->buffer_size = BUF_SIZE;
1267         else
1268                 card->buffer_size = OLD_BUF_SIZE;
1269         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1270                  major_ver, minor_ver, fpga_ver);
1271 
1272         if (fpga_ver < 37 && (fpga_upgrade || firmware_upgrade ||
1273                               db_fpga_upgrade || db_firmware_upgrade)) {
1274                 dev_warn(&dev->dev,
1275                          "FPGA too old; cannot upgrade flash. Use JTAG.\n");
1276                 fpga_upgrade = firmware_upgrade = 0;
1277                 db_fpga_upgrade = db_firmware_upgrade = 0;
1278         }
1279 
1280         /* Stopped using Atmel flash after 0.03-38 */
1281         if (fpga_ver < 39)
1282                 card->atmel_flash = 1;
1283         else
1284                 card->atmel_flash = 0;
1285 
1286         data32 = ioread32(card->config_regs + PORTS);
1287         card->nr_ports = (data32 & 0x000000FF);
1288 
1289         if (card->fpga_version >= DMA_SUPPORTED) {
1290                 pci_set_master(dev);
1291                 card->using_dma = 1;
1292                 if (1) { /* All known FPGA versions so far */
1293                         card->dma_alignment = 3;
1294                         card->dma_bounce = kmalloc(card->nr_ports * BUF_SIZE, GFP_KERNEL);
1295                         if (!card->dma_bounce) {
1296                                 dev_warn(&card->dev->dev, "Failed to allocate DMA bounce buffers\n");
1297                                 err = -ENOMEM;
1298                                 /* Fallback to MMIO doesn't work */
1299                                 goto out_unmap_both;
1300                         }
1301                 }
1302         } else {
1303                 card->using_dma = 0;
1304                 /* Set RX empty flag for all ports */
1305                 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1306         }
1307 
1308         pci_set_drvdata(dev, card);
1309 
1310         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1311         spin_lock_init(&card->tx_lock);
1312         spin_lock_init(&card->tx_queue_lock);
1313         spin_lock_init(&card->cli_queue_lock);
1314         spin_lock_init(&card->param_queue_lock);
1315         INIT_LIST_HEAD(&card->param_queue);
1316 
1317         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1318                           "solos-pci", card);
1319         if (err) {
1320                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1321                 goto out_unmap_both;
1322         }
1323 
1324         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1325 
1326         if (fpga_upgrade)
1327                 flash_upgrade(card, 0);
1328 
1329         if (firmware_upgrade)
1330                 flash_upgrade(card, 1);
1331 
1332         if (db_fpga_upgrade)
1333                 flash_upgrade(card, 2);
1334 
1335         if (db_firmware_upgrade)
1336                 flash_upgrade(card, 3);
1337 
1338         err = atm_init(card, &dev->dev);
1339         if (err)
1340                 goto out_free_irq;
1341 
1342         if (card->fpga_version >= DMA_SUPPORTED &&
1343             sysfs_create_group(&card->dev->dev.kobj, &gpio_attr_group))
1344                 dev_err(&card->dev->dev, "Could not register parameter group for GPIOs\n");
1345 
1346         return 0;
1347 
1348  out_free_irq:
1349         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1350         free_irq(dev->irq, card);
1351         tasklet_kill(&card->tlet);
1352         
1353  out_unmap_both:
1354         kfree(card->dma_bounce);
1355         pci_iounmap(dev, card->buffers);
1356  out_unmap_config:
1357         pci_iounmap(dev, card->config_regs);
1358  out_release_regions:
1359         pci_release_regions(dev);
1360  out:
1361         kfree(card);
1362         return err;
1363 }
1364 
1365 static int atm_init(struct solos_card *card, struct device *parent)
1366 {
1367         int i;
1368 
1369         for (i = 0; i < card->nr_ports; i++) {
1370                 struct sk_buff *skb;
1371                 struct pkt_hdr *header;
1372 
1373                 skb_queue_head_init(&card->tx_queue[i]);
1374                 skb_queue_head_init(&card->cli_queue[i]);
1375 
1376                 card->atmdev[i] = atm_dev_register("solos-pci", parent, &fpga_ops, -1, NULL);
1377                 if (!card->atmdev[i]) {
1378                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1379                         atm_remove(card);
1380                         return -ENODEV;
1381                 }
1382                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1383                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1384                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1385                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1386 
1387                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1388 
1389                 card->atmdev[i]->ci_range.vpi_bits = 8;
1390                 card->atmdev[i]->ci_range.vci_bits = 16;
1391                 card->atmdev[i]->dev_data = card;
1392                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1393                 atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);
1394 
1395                 skb = alloc_skb(sizeof(*header), GFP_KERNEL);
1396                 if (!skb) {
1397                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1398                         continue;
1399                 }
1400 
1401                 header = (void *)skb_put(skb, sizeof(*header));
1402 
1403                 header->size = cpu_to_le16(0);
1404                 header->vpi = cpu_to_le16(0);
1405                 header->vci = cpu_to_le16(0);
1406                 header->type = cpu_to_le16(PKT_STATUS);
1407 
1408                 fpga_queue(card, i, skb, NULL);
1409         }
1410         return 0;
1411 }
1412 
1413 static void atm_remove(struct solos_card *card)
1414 {
1415         int i;
1416 
1417         for (i = 0; i < card->nr_ports; i++) {
1418                 if (card->atmdev[i]) {
1419                         struct sk_buff *skb;
1420 
1421                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1422 
1423                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1424                         atm_dev_deregister(card->atmdev[i]);
1425 
1426                         skb = card->rx_skb[i];
1427                         if (skb) {
1428                                 dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
1429                                                  RX_DMA_SIZE, DMA_FROM_DEVICE);
1430                                 dev_kfree_skb(skb);
1431                         }
1432                         skb = card->tx_skb[i];
1433                         if (skb) {
1434                                 dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
1435                                                  skb->len, DMA_TO_DEVICE);
1436                                 dev_kfree_skb(skb);
1437                         }
1438                         while ((skb = skb_dequeue(&card->tx_queue[i])))
1439                                 dev_kfree_skb(skb);
1440  
1441                 }
1442         }
1443 }
1444 
1445 static void fpga_remove(struct pci_dev *dev)
1446 {
1447         struct solos_card *card = pci_get_drvdata(dev);
1448         
1449         /* Disable IRQs */
1450         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1451 
1452         /* Reset FPGA */
1453         iowrite32(1, card->config_regs + FPGA_MODE);
1454         (void)ioread32(card->config_regs + FPGA_MODE); 
1455 
1456         if (card->fpga_version >= DMA_SUPPORTED)
1457                 sysfs_remove_group(&card->dev->dev.kobj, &gpio_attr_group);
1458 
1459         atm_remove(card);
1460 
1461         free_irq(dev->irq, card);
1462         tasklet_kill(&card->tlet);
1463 
1464         kfree(card->dma_bounce);
1465 
1466         /* Release device from reset */
1467         iowrite32(0, card->config_regs + FPGA_MODE);
1468         (void)ioread32(card->config_regs + FPGA_MODE); 
1469 
1470         pci_iounmap(dev, card->buffers);
1471         pci_iounmap(dev, card->config_regs);
1472 
1473         pci_release_regions(dev);
1474         pci_disable_device(dev);
1475 
1476         kfree(card);
1477 }
1478 
1479 static struct pci_device_id fpga_pci_tbl[] = {
1480         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1481         { 0, }
1482 };
1483 
1484 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1485 
1486 static struct pci_driver fpga_driver = {
1487         .name =         "solos",
1488         .id_table =     fpga_pci_tbl,
1489         .probe =        fpga_probe,
1490         .remove =       fpga_remove,
1491 };
1492 
1493 
1494 static int __init solos_pci_init(void)
1495 {
1496         BUILD_BUG_ON(sizeof(struct solos_skb_cb) > sizeof(((struct sk_buff *)0)->cb));
1497 
1498         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1499         return pci_register_driver(&fpga_driver);
1500 }
1501 
1502 static void __exit solos_pci_exit(void)
1503 {
1504         pci_unregister_driver(&fpga_driver);
1505         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1506 }
1507 
1508 module_init(solos_pci_init);
1509 module_exit(solos_pci_exit);
1510 

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