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/
7 * Copyright © 2008 Traverse Technologies
8 * Copyright © 2008 Intel Corporation
10 * Authors: Nathan Williams <nathan@traverse.com.au>
11 * David Woodhouse <dwmw2@infradead.org>
12 * Treker Chen <treker@xrio.com>
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.
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.
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>
44 #define VERSION "0.07"
45 #define PTAG "solos-pci"
47 #define CONFIG_RAM_SIZE 128
48 #define FLAGS_ADDR 0x7C
49 #define IRQ_EN_ADDR 0x78
51 #define IRQ_CLEAR 0x70
52 #define WRITE_FLASH 0x6C
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)))
61 #define DATA_RAM_SIZE 32768
63 #define OLD_BUF_SIZE 4096 /* For FPGA versions <= 2*/
64 #define FPGA_PAGE 528 /* FPGA flash page size*/
65 #define SOLOS_PAGE 512 /* Solos flash page size*/
66 #define FPGA_BLOCK (FPGA_PAGE * 8) /* FPGA flash block size*/
67 #define SOLOS_BLOCK (SOLOS_PAGE * 8) /* Solos flash block size*/
69 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
70 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
71 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
73 #define RX_DMA_SIZE 2048
75 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
76 #define LEGACY_BUFFERS 2
77 #define DMA_SUPPORTED 4
80 static int atmdebug = 0;
81 static int firmware_upgrade = 0;
82 static int fpga_upgrade = 0;
83 static int db_firmware_upgrade = 0;
84 static int db_fpga_upgrade = 0;
99 #define SKB_CB(skb) ((struct solos_skb_cb *)skb->cb)
102 #define PKT_COMMAND 1
108 void __iomem *config_regs;
109 void __iomem *buffers;
113 struct atm_dev *atmdev[4];
114 struct tasklet_struct tlet;
116 spinlock_t tx_queue_lock;
117 spinlock_t cli_queue_lock;
118 spinlock_t param_queue_lock;
119 struct list_head param_queue;
120 struct sk_buff_head tx_queue[4];
121 struct sk_buff_head cli_queue[4];
122 struct sk_buff *tx_skb[4];
123 struct sk_buff *rx_skb[4];
124 wait_queue_head_t param_wq;
125 wait_queue_head_t fw_wq;
133 struct list_head list;
136 struct sk_buff *response;
139 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
141 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
142 MODULE_DESCRIPTION("Solos PCI driver");
143 MODULE_VERSION(VERSION);
144 MODULE_LICENSE("GPL");
145 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
146 MODULE_PARM_DESC(atmdebug, "Print ATM data");
147 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
148 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
149 MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
150 MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
151 module_param(reset, int, 0444);
152 module_param(atmdebug, int, 0644);
153 module_param(firmware_upgrade, int, 0444);
154 module_param(fpga_upgrade, int, 0444);
155 module_param(db_firmware_upgrade, int, 0444);
156 module_param(db_fpga_upgrade, int, 0444);
158 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
159 struct atm_vcc *vcc);
160 static uint32_t fpga_tx(struct solos_card *);
161 static irqreturn_t solos_irq(int irq, void *dev_id);
162 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
163 static int list_vccs(int vci);
164 static void release_vccs(struct atm_dev *dev);
165 static int atm_init(struct solos_card *);
166 static void atm_remove(struct solos_card *);
167 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
168 static void solos_bh(unsigned long);
169 static int print_buffer(struct sk_buff *buf);
171 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
176 dev_kfree_skb_any(skb);
179 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
182 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
183 struct solos_card *card = atmdev->dev_data;
184 struct solos_param prm;
186 struct pkt_hdr *header;
189 buflen = strlen(attr->attr.name) + 10;
191 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
193 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
197 header = (void *)skb_put(skb, sizeof(*header));
199 buflen = snprintf((void *)&header[1], buflen - 1,
200 "L%05d\n%s\n", current->pid, attr->attr.name);
201 skb_put(skb, buflen);
203 header->size = cpu_to_le16(buflen);
204 header->vpi = cpu_to_le16(0);
205 header->vci = cpu_to_le16(0);
206 header->type = cpu_to_le16(PKT_COMMAND);
208 prm.pid = current->pid;
210 prm.port = SOLOS_CHAN(atmdev);
212 spin_lock_irq(&card->param_queue_lock);
213 list_add(&prm.list, &card->param_queue);
214 spin_unlock_irq(&card->param_queue_lock);
216 fpga_queue(card, prm.port, skb, NULL);
218 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
220 spin_lock_irq(&card->param_queue_lock);
222 spin_unlock_irq(&card->param_queue_lock);
227 buflen = prm.response->len;
228 memcpy(buf, prm.response->data, buflen);
229 kfree_skb(prm.response);
234 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
235 const char *buf, size_t count)
237 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
238 struct solos_card *card = atmdev->dev_data;
239 struct solos_param prm;
241 struct pkt_hdr *header;
245 buflen = strlen(attr->attr.name) + 11 + count;
247 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
249 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
253 header = (void *)skb_put(skb, sizeof(*header));
255 buflen = snprintf((void *)&header[1], buflen - 1,
256 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
258 skb_put(skb, buflen);
259 header->size = cpu_to_le16(buflen);
260 header->vpi = cpu_to_le16(0);
261 header->vci = cpu_to_le16(0);
262 header->type = cpu_to_le16(PKT_COMMAND);
264 prm.pid = current->pid;
266 prm.port = SOLOS_CHAN(atmdev);
268 spin_lock_irq(&card->param_queue_lock);
269 list_add(&prm.list, &card->param_queue);
270 spin_unlock_irq(&card->param_queue_lock);
272 fpga_queue(card, prm.port, skb, NULL);
274 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
276 spin_lock_irq(&card->param_queue_lock);
278 spin_unlock_irq(&card->param_queue_lock);
287 /* Sometimes it has a newline, sometimes it doesn't. */
288 if (skb->data[buflen - 1] == '\n')
291 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
293 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
296 /* We know we have enough space allocated for this; we allocated
298 skb->data[buflen] = 0;
300 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
309 static char *next_string(struct sk_buff *skb)
312 char *this = skb->data;
314 for (i = 0; i < skb->len; i++) {
315 if (this[i] == '\n') {
317 skb_pull(skb, i + 1);
320 if (!isprint(this[i]))
327 * Status packet has fields separated by \n, starting with a version number
328 * for the information therein. Fields are....
331 * RxBitRate (version >= 1)
332 * TxBitRate (version >= 1)
333 * State (version >= 1)
334 * LocalSNRMargin (version >= 1)
335 * LocalLineAttn (version >= 1)
337 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
339 char *str, *end, *state_str, *snr, *attn;
340 int ver, rate_up, rate_down;
342 if (!card->atmdev[port])
345 str = next_string(skb);
349 ver = simple_strtol(str, NULL, 10);
351 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
356 str = next_string(skb);
359 if (!strcmp(str, "ERROR")) {
360 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
365 rate_down = simple_strtol(str, &end, 10);
369 str = next_string(skb);
372 rate_up = simple_strtol(str, &end, 10);
376 state_str = next_string(skb);
380 /* Anything but 'Showtime' is down */
381 if (strcmp(state_str, "Showtime")) {
382 card->atmdev[port]->signal = ATM_PHY_SIG_LOST;
383 release_vccs(card->atmdev[port]);
384 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
388 snr = next_string(skb);
391 attn = next_string(skb);
395 dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
396 port, state_str, rate_down/1000, rate_up/1000,
397 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
399 card->atmdev[port]->link_rate = rate_down / 424;
400 card->atmdev[port]->signal = ATM_PHY_SIG_FOUND;
405 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
407 struct solos_param *prm;
415 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
416 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
417 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
418 skb->data[6] != '\n')
421 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
423 spin_lock_irqsave(&card->param_queue_lock, flags);
424 list_for_each_entry(prm, &card->param_queue, list) {
425 if (prm->port == port && prm->pid == cmdpid) {
428 wake_up(&card->param_wq);
433 spin_unlock_irqrestore(&card->param_queue_lock, flags);
437 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
440 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
441 struct solos_card *card = atmdev->dev_data;
444 spin_lock(&card->cli_queue_lock);
445 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
446 spin_unlock(&card->cli_queue_lock);
448 return sprintf(buf, "No data.\n");
450 memcpy(buf, skb->data, skb->len);
451 dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
457 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
460 struct pkt_hdr *header;
462 if (size > (BUF_SIZE - sizeof(*header))) {
463 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
466 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
468 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
472 header = (void *)skb_put(skb, sizeof(*header));
474 header->size = cpu_to_le16(size);
475 header->vpi = cpu_to_le16(0);
476 header->vci = cpu_to_le16(0);
477 header->type = cpu_to_le16(PKT_COMMAND);
479 memcpy(skb_put(skb, size), buf, size);
481 fpga_queue(card, dev, skb, NULL);
486 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
487 const char *buf, size_t count)
489 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
490 struct solos_card *card = atmdev->dev_data;
493 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
498 static DEVICE_ATTR(console, 0644, console_show, console_store);
501 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
502 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
504 #include "solos-attrlist.c"
509 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
510 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
512 static struct attribute *solos_attrs[] = {
513 #include "solos-attrlist.c"
517 static struct attribute_group solos_attr_group = {
518 .attrs = solos_attrs,
519 .name = "parameters",
522 static int flash_upgrade(struct solos_card *card, int chip)
524 const struct firmware *fw;
532 fw_name = "solos-FPGA.bin";
533 blocksize = FPGA_BLOCK;
537 fw_name = "solos-Firmware.bin";
538 blocksize = SOLOS_BLOCK;
542 if (card->fpga_version > LEGACY_BUFFERS){
543 fw_name = "solos-db-FPGA.bin";
544 blocksize = FPGA_BLOCK;
546 dev_info(&card->dev->dev, "FPGA version doesn't support daughter board upgrades\n");
552 if (card->fpga_version > LEGACY_BUFFERS){
553 fw_name = "solos-Firmware.bin";
554 blocksize = SOLOS_BLOCK;
556 dev_info(&card->dev->dev, "FPGA version doesn't support daughter board upgrades\n");
561 if (request_firmware(&fw, fw_name, &card->dev->dev))
564 dev_info(&card->dev->dev, "Flash upgrade starting\n");
566 numblocks = fw->size / blocksize;
567 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
568 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
570 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
571 iowrite32(1, card->config_regs + FPGA_MODE);
572 data32 = ioread32(card->config_regs + FPGA_MODE);
574 /* Set mode to Chip Erase */
575 if(chip == 0 || chip == 2)
576 dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
577 if(chip == 1 || chip == 3)
578 dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
579 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
582 iowrite32(1, card->config_regs + WRITE_FLASH);
583 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
585 for (offset = 0; offset < fw->size; offset += blocksize) {
588 /* Clear write flag */
589 iowrite32(0, card->config_regs + WRITE_FLASH);
591 /* Set mode to Block Write */
592 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
593 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
595 /* Copy block to buffer, swapping each 16 bits */
596 for(i = 0; i < blocksize; i += 4) {
597 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
598 if(card->fpga_version > LEGACY_BUFFERS)
599 iowrite32(word, FLASH_BUF + i);
601 iowrite32(word, RX_BUF(card, 3) + i);
604 /* Specify block number and then trigger flash write */
605 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
606 iowrite32(1, card->config_regs + WRITE_FLASH);
607 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
610 release_firmware(fw);
611 iowrite32(0, card->config_regs + WRITE_FLASH);
612 iowrite32(0, card->config_regs + FPGA_MODE);
613 iowrite32(0, card->config_regs + FLASH_MODE);
614 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
618 static irqreturn_t solos_irq(int irq, void *dev_id)
620 struct solos_card *card = dev_id;
623 iowrite32(0, card->config_regs + IRQ_CLEAR);
625 /* If we're up and running, just kick the tasklet to process TX/RX */
627 tasklet_schedule(&card->tlet);
629 wake_up(&card->fw_wq);
631 return IRQ_RETVAL(handled);
634 void solos_bh(unsigned long card_arg)
636 struct solos_card *card = (void *)card_arg;
638 uint32_t rx_done = 0;
642 * Since fpga_tx() is going to need to read the flags under its lock,
643 * it can return them to us so that we don't have to hit PCI MMIO
644 * again for the same information
646 card_flags = fpga_tx(card);
648 for (port = 0; port < card->nr_ports; port++) {
649 if (card_flags & (0x10 << port)) {
650 struct pkt_hdr _hdr, *header;
655 if (card->using_dma) {
656 skb = card->rx_skb[port];
657 card->rx_skb[port] = NULL;
659 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
660 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
662 header = (void *)skb->data;
663 size = le16_to_cpu(header->size);
664 skb_put(skb, size + sizeof(*header));
665 skb_pull(skb, sizeof(*header));
669 rx_done |= 0x10 << port;
671 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
673 size = le16_to_cpu(header->size);
674 if (size > (card->buffer_size - sizeof(*header))){
675 dev_warn(&card->dev->dev, "Invalid buffer size\n");
679 skb = alloc_skb(size + 1, GFP_ATOMIC);
682 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
686 memcpy_fromio(skb_put(skb, size),
687 RX_BUF(card, port) + sizeof(*header),
691 dev_info(&card->dev->dev, "Received: device %d\n", port);
692 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
693 size, le16_to_cpu(header->vpi),
694 le16_to_cpu(header->vci));
698 switch (le16_to_cpu(header->type)) {
700 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
701 le16_to_cpu(header->vci));
704 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
705 le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
709 atm_charge(vcc, skb->truesize);
711 atomic_inc(&vcc->stats->rx);
715 if (process_status(card, port, skb) &&
717 dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
720 dev_kfree_skb_any(skb);
724 default: /* FIXME: Not really, surely? */
725 if (process_command(card, port, skb))
727 spin_lock(&card->cli_queue_lock);
728 if (skb_queue_len(&card->cli_queue[port]) > 10) {
730 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
732 dev_kfree_skb_any(skb);
734 skb_queue_tail(&card->cli_queue[port], skb);
735 spin_unlock(&card->cli_queue_lock);
739 /* Allocate RX skbs for any ports which need them */
740 if (card->using_dma && card->atmdev[port] &&
741 !card->rx_skb[port]) {
742 struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
744 SKB_CB(skb)->dma_addr =
745 pci_map_single(card->dev, skb->data,
746 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
747 iowrite32(SKB_CB(skb)->dma_addr,
748 card->config_regs + RX_DMA_ADDR(port));
749 card->rx_skb[port] = skb;
752 dev_warn(&card->dev->dev, "Failed to allocate RX skb");
754 /* We'll have to try again later */
755 tasklet_schedule(&card->tlet);
760 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
765 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
767 struct hlist_head *head;
768 struct atm_vcc *vcc = NULL;
769 struct hlist_node *node;
772 read_lock(&vcc_sklist_lock);
773 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
774 sk_for_each(s, node, head) {
776 if (vcc->dev == dev && vcc->vci == vci &&
777 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
782 read_unlock(&vcc_sklist_lock);
786 static int list_vccs(int vci)
788 struct hlist_head *head;
790 struct hlist_node *node;
795 read_lock(&vcc_sklist_lock);
797 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
798 sk_for_each(s, node, head) {
801 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
807 for(i = 0; i < VCC_HTABLE_SIZE; i++){
809 sk_for_each(s, node, head) {
812 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
819 read_unlock(&vcc_sklist_lock);
823 static void release_vccs(struct atm_dev *dev)
827 write_lock_irq(&vcc_sklist_lock);
828 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
829 struct hlist_head *head = &vcc_hash[i];
830 struct hlist_node *node, *tmp;
834 sk_for_each_safe(s, node, tmp, head) {
836 if (vcc->dev == dev) {
837 vcc_release_async(vcc, -EPIPE);
842 write_unlock_irq(&vcc_sklist_lock);
846 static int popen(struct atm_vcc *vcc)
848 struct solos_card *card = vcc->dev->dev_data;
850 struct pkt_hdr *header;
852 if (vcc->qos.aal != ATM_AAL5) {
853 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
858 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
859 if (!skb && net_ratelimit()) {
860 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
863 header = (void *)skb_put(skb, sizeof(*header));
865 header->size = cpu_to_le16(0);
866 header->vpi = cpu_to_le16(vcc->vpi);
867 header->vci = cpu_to_le16(vcc->vci);
868 header->type = cpu_to_le16(PKT_POPEN);
870 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
872 set_bit(ATM_VF_ADDR, &vcc->flags);
873 set_bit(ATM_VF_READY, &vcc->flags);
880 static void pclose(struct atm_vcc *vcc)
882 struct solos_card *card = vcc->dev->dev_data;
884 struct pkt_hdr *header;
886 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
888 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
891 header = (void *)skb_put(skb, sizeof(*header));
893 header->size = cpu_to_le16(0);
894 header->vpi = cpu_to_le16(vcc->vpi);
895 header->vci = cpu_to_le16(vcc->vci);
896 header->type = cpu_to_le16(PKT_PCLOSE);
898 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
900 clear_bit(ATM_VF_ADDR, &vcc->flags);
901 clear_bit(ATM_VF_READY, &vcc->flags);
906 static int print_buffer(struct sk_buff *buf)
913 for (i = 0; i < len; i++){
915 sprintf(msg, "%02X: ", i);
917 sprintf(item,"%02X ",*(buf->data + i));
922 printk(KERN_DEBUG "%s", msg);
928 printk(KERN_DEBUG "%s", msg);
930 printk(KERN_DEBUG "\n");
935 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
941 SKB_CB(skb)->vcc = vcc;
943 spin_lock_irqsave(&card->tx_queue_lock, flags);
944 old_len = skb_queue_len(&card->tx_queue[port]);
945 skb_queue_tail(&card->tx_queue[port], skb);
947 card->tx_mask |= (1 << port);
948 spin_unlock_irqrestore(&card->tx_queue_lock, flags);
950 /* Theoretically we could just schedule the tasklet here, but
951 that introduces latency we don't want -- it's noticeable */
956 static uint32_t fpga_tx(struct solos_card *card)
958 uint32_t tx_pending, card_flags;
959 uint32_t tx_started = 0;
965 spin_lock_irqsave(&card->tx_lock, flags);
967 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
969 * The queue lock is required for _writing_ to tx_mask, but we're
970 * OK to read it here without locking. The only potential update
971 * that we could race with is in fpga_queue() where it sets a bit
972 * for a new port... but it's going to call this function again if
973 * it's doing that, anyway.
975 tx_pending = card->tx_mask & ~card_flags;
977 for (port = 0; tx_pending; tx_pending >>= 1, port++) {
978 if (tx_pending & 1) {
979 struct sk_buff *oldskb = card->tx_skb[port];
981 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
982 oldskb->len, PCI_DMA_TODEVICE);
984 spin_lock(&card->tx_queue_lock);
985 skb = skb_dequeue(&card->tx_queue[port]);
987 card->tx_mask &= ~(1 << port);
988 spin_unlock(&card->tx_queue_lock);
990 if (skb && !card->using_dma) {
991 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
992 tx_started |= 1 << port;
993 oldskb = skb; /* We're done with this skb already */
994 } else if (skb && card->using_dma) {
995 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
996 skb->len, PCI_DMA_TODEVICE);
997 iowrite32(SKB_CB(skb)->dma_addr,
998 card->config_regs + TX_DMA_ADDR(port));
1004 /* Clean up and free oldskb now it's gone */
1006 dev_info(&card->dev->dev, "Transmitted: port %d\n",
1008 print_buffer(oldskb);
1011 vcc = SKB_CB(oldskb)->vcc;
1014 atomic_inc(&vcc->stats->tx);
1015 solos_pop(vcc, oldskb);
1017 dev_kfree_skb_irq(oldskb);
1021 /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1023 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1025 spin_unlock_irqrestore(&card->tx_lock, flags);
1029 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1031 struct solos_card *card = vcc->dev->dev_data;
1032 struct pkt_hdr *header;
1036 if (pktlen > (BUF_SIZE - sizeof(*header))) {
1037 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1038 solos_pop(vcc, skb);
1042 if (!skb_clone_writable(skb, sizeof(*header))) {
1046 if (skb_headroom(skb) < sizeof(*header))
1047 expand_by = sizeof(*header) - skb_headroom(skb);
1049 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1051 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1052 solos_pop(vcc, skb);
1057 header = (void *)skb_push(skb, sizeof(*header));
1059 /* This does _not_ include the size of the header */
1060 header->size = cpu_to_le16(pktlen);
1061 header->vpi = cpu_to_le16(vcc->vpi);
1062 header->vci = cpu_to_le16(vcc->vci);
1063 header->type = cpu_to_le16(PKT_DATA);
1065 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1070 static struct atmdev_ops fpga_ops = {
1082 .owner = THIS_MODULE
1085 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1089 uint8_t major_ver, minor_ver;
1091 struct solos_card *card;
1093 card = kzalloc(sizeof(*card), GFP_KERNEL);
1098 init_waitqueue_head(&card->fw_wq);
1099 init_waitqueue_head(&card->param_wq);
1101 err = pci_enable_device(dev);
1103 dev_warn(&dev->dev, "Failed to enable PCI device\n");
1107 err = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
1109 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1113 err = pci_request_regions(dev, "solos");
1115 dev_warn(&dev->dev, "Failed to request regions\n");
1119 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1120 if (!card->config_regs) {
1121 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1122 goto out_release_regions;
1124 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1125 if (!card->buffers) {
1126 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1127 goto out_unmap_config;
1131 iowrite32(1, card->config_regs + FPGA_MODE);
1132 data32 = ioread32(card->config_regs + FPGA_MODE);
1134 iowrite32(0, card->config_regs + FPGA_MODE);
1135 data32 = ioread32(card->config_regs + FPGA_MODE);
1138 data32 = ioread32(card->config_regs + FPGA_VER);
1139 fpga_ver = (data32 & 0x0000FFFF);
1140 major_ver = ((data32 & 0xFF000000) >> 24);
1141 minor_ver = ((data32 & 0x00FF0000) >> 16);
1142 card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1143 if (card->fpga_version > LEGACY_BUFFERS)
1144 card->buffer_size = BUF_SIZE;
1146 card->buffer_size = OLD_BUF_SIZE;
1147 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1148 major_ver, minor_ver, fpga_ver);
1150 if (card->fpga_version >= DMA_SUPPORTED){
1151 card->using_dma = 1;
1153 card->using_dma = 0;
1154 /* Set RX empty flag for all ports */
1155 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1158 data32 = ioread32(card->config_regs + PORTS);
1159 card->nr_ports = (data32 & 0x000000FF);
1161 pci_set_drvdata(dev, card);
1163 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1164 spin_lock_init(&card->tx_lock);
1165 spin_lock_init(&card->tx_queue_lock);
1166 spin_lock_init(&card->cli_queue_lock);
1167 spin_lock_init(&card->param_queue_lock);
1168 INIT_LIST_HEAD(&card->param_queue);
1170 err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1173 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1174 goto out_unmap_both;
1177 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1180 flash_upgrade(card, 0);
1182 if (firmware_upgrade)
1183 flash_upgrade(card, 1);
1185 if (db_fpga_upgrade)
1186 flash_upgrade(card, 2);
1188 if (db_firmware_upgrade)
1189 flash_upgrade(card, 3);
1191 err = atm_init(card);
1198 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1199 free_irq(dev->irq, card);
1200 tasklet_kill(&card->tlet);
1203 pci_set_drvdata(dev, NULL);
1204 pci_iounmap(dev, card->config_regs);
1206 pci_iounmap(dev, card->buffers);
1207 out_release_regions:
1208 pci_release_regions(dev);
1214 static int atm_init(struct solos_card *card)
1218 for (i = 0; i < card->nr_ports; i++) {
1219 struct sk_buff *skb;
1220 struct pkt_hdr *header;
1222 skb_queue_head_init(&card->tx_queue[i]);
1223 skb_queue_head_init(&card->cli_queue[i]);
1225 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1226 if (!card->atmdev[i]) {
1227 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1231 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1232 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1233 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1234 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1236 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1238 card->atmdev[i]->ci_range.vpi_bits = 8;
1239 card->atmdev[i]->ci_range.vci_bits = 16;
1240 card->atmdev[i]->dev_data = card;
1241 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1242 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1244 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1246 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1250 header = (void *)skb_put(skb, sizeof(*header));
1252 header->size = cpu_to_le16(0);
1253 header->vpi = cpu_to_le16(0);
1254 header->vci = cpu_to_le16(0);
1255 header->type = cpu_to_le16(PKT_STATUS);
1257 fpga_queue(card, i, skb, NULL);
1262 static void atm_remove(struct solos_card *card)
1266 for (i = 0; i < card->nr_ports; i++) {
1267 if (card->atmdev[i]) {
1268 struct sk_buff *skb;
1270 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1272 sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1273 atm_dev_deregister(card->atmdev[i]);
1275 skb = card->rx_skb[i];
1277 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1278 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
1281 skb = card->tx_skb[i];
1283 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1284 skb->len, PCI_DMA_TODEVICE);
1287 while ((skb = skb_dequeue(&card->tx_queue[i])))
1294 static void fpga_remove(struct pci_dev *dev)
1296 struct solos_card *card = pci_get_drvdata(dev);
1299 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1302 iowrite32(1, card->config_regs + FPGA_MODE);
1303 (void)ioread32(card->config_regs + FPGA_MODE);
1307 free_irq(dev->irq, card);
1308 tasklet_kill(&card->tlet);
1310 /* Release device from reset */
1311 iowrite32(0, card->config_regs + FPGA_MODE);
1312 (void)ioread32(card->config_regs + FPGA_MODE);
1314 pci_iounmap(dev, card->buffers);
1315 pci_iounmap(dev, card->config_regs);
1317 pci_release_regions(dev);
1318 pci_disable_device(dev);
1320 pci_set_drvdata(dev, NULL);
1324 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1325 { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1329 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1331 static struct pci_driver fpga_driver = {
1333 .id_table = fpga_pci_tbl,
1334 .probe = fpga_probe,
1335 .remove = fpga_remove,
1339 static int __init solos_pci_init(void)
1341 printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1342 return pci_register_driver(&fpga_driver);
1345 static void __exit solos_pci_exit(void)
1347 pci_unregister_driver(&fpga_driver);
1348 printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1351 module_init(solos_pci_init);
1352 module_exit(solos_pci_exit);