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>
43 #include <linux/slab.h>
45 #define VERSION "0.07"
46 #define PTAG "solos-pci"
48 #define CONFIG_RAM_SIZE 128
49 #define FLAGS_ADDR 0x7C
50 #define IRQ_EN_ADDR 0x78
52 #define IRQ_CLEAR 0x70
53 #define WRITE_FLASH 0x6C
55 #define FLASH_BLOCK 0x64
56 #define FLASH_BUSY 0x60
57 #define FPGA_MODE 0x5C
58 #define FLASH_MODE 0x58
59 #define TX_DMA_ADDR(port) (0x40 + (4 * (port)))
60 #define RX_DMA_ADDR(port) (0x30 + (4 * (port)))
62 #define DATA_RAM_SIZE 32768
64 #define OLD_BUF_SIZE 4096 /* For FPGA versions <= 2*/
65 #define FPGA_PAGE 528 /* FPGA flash page size*/
66 #define SOLOS_PAGE 512 /* Solos flash page size*/
67 #define FPGA_BLOCK (FPGA_PAGE * 8) /* FPGA flash block size*/
68 #define SOLOS_BLOCK (SOLOS_PAGE * 8) /* Solos flash block size*/
70 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
71 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
72 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
74 #define RX_DMA_SIZE 2048
76 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
77 #define LEGACY_BUFFERS 2
78 #define DMA_SUPPORTED 4
81 static int atmdebug = 0;
82 static int firmware_upgrade = 0;
83 static int fpga_upgrade = 0;
84 static int db_firmware_upgrade = 0;
85 static int db_fpga_upgrade = 0;
100 #define SKB_CB(skb) ((struct solos_skb_cb *)skb->cb)
103 #define PKT_COMMAND 1
109 void __iomem *config_regs;
110 void __iomem *buffers;
114 struct atm_dev *atmdev[4];
115 struct tasklet_struct tlet;
117 spinlock_t tx_queue_lock;
118 spinlock_t cli_queue_lock;
119 spinlock_t param_queue_lock;
120 struct list_head param_queue;
121 struct sk_buff_head tx_queue[4];
122 struct sk_buff_head cli_queue[4];
123 struct sk_buff *tx_skb[4];
124 struct sk_buff *rx_skb[4];
125 wait_queue_head_t param_wq;
126 wait_queue_head_t fw_wq;
134 struct list_head list;
137 struct sk_buff *response;
140 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
142 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
143 MODULE_DESCRIPTION("Solos PCI driver");
144 MODULE_VERSION(VERSION);
145 MODULE_LICENSE("GPL");
146 MODULE_FIRMWARE("solos-FPGA.bin");
147 MODULE_FIRMWARE("solos-Firmware.bin");
148 MODULE_FIRMWARE("solos-db-FPGA.bin");
149 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
150 MODULE_PARM_DESC(atmdebug, "Print ATM data");
151 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
152 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
153 MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
154 MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
155 module_param(reset, int, 0444);
156 module_param(atmdebug, int, 0644);
157 module_param(firmware_upgrade, int, 0444);
158 module_param(fpga_upgrade, int, 0444);
159 module_param(db_firmware_upgrade, int, 0444);
160 module_param(db_fpga_upgrade, int, 0444);
162 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
163 struct atm_vcc *vcc);
164 static uint32_t fpga_tx(struct solos_card *);
165 static irqreturn_t solos_irq(int irq, void *dev_id);
166 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
167 static int list_vccs(int vci);
168 static void release_vccs(struct atm_dev *dev);
169 static int atm_init(struct solos_card *, struct device *);
170 static void atm_remove(struct solos_card *);
171 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
172 static void solos_bh(unsigned long);
173 static int print_buffer(struct sk_buff *buf);
175 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
180 dev_kfree_skb_any(skb);
183 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
186 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
187 struct solos_card *card = atmdev->dev_data;
188 struct solos_param prm;
190 struct pkt_hdr *header;
193 buflen = strlen(attr->attr.name) + 10;
195 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
197 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
201 header = (void *)skb_put(skb, sizeof(*header));
203 buflen = snprintf((void *)&header[1], buflen - 1,
204 "L%05d\n%s\n", current->pid, attr->attr.name);
205 skb_put(skb, buflen);
207 header->size = cpu_to_le16(buflen);
208 header->vpi = cpu_to_le16(0);
209 header->vci = cpu_to_le16(0);
210 header->type = cpu_to_le16(PKT_COMMAND);
212 prm.pid = current->pid;
214 prm.port = SOLOS_CHAN(atmdev);
216 spin_lock_irq(&card->param_queue_lock);
217 list_add(&prm.list, &card->param_queue);
218 spin_unlock_irq(&card->param_queue_lock);
220 fpga_queue(card, prm.port, skb, NULL);
222 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
224 spin_lock_irq(&card->param_queue_lock);
226 spin_unlock_irq(&card->param_queue_lock);
231 buflen = prm.response->len;
232 memcpy(buf, prm.response->data, buflen);
233 kfree_skb(prm.response);
238 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
239 const char *buf, size_t count)
241 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
242 struct solos_card *card = atmdev->dev_data;
243 struct solos_param prm;
245 struct pkt_hdr *header;
249 buflen = strlen(attr->attr.name) + 11 + count;
251 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
253 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
257 header = (void *)skb_put(skb, sizeof(*header));
259 buflen = snprintf((void *)&header[1], buflen - 1,
260 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
262 skb_put(skb, buflen);
263 header->size = cpu_to_le16(buflen);
264 header->vpi = cpu_to_le16(0);
265 header->vci = cpu_to_le16(0);
266 header->type = cpu_to_le16(PKT_COMMAND);
268 prm.pid = current->pid;
270 prm.port = SOLOS_CHAN(atmdev);
272 spin_lock_irq(&card->param_queue_lock);
273 list_add(&prm.list, &card->param_queue);
274 spin_unlock_irq(&card->param_queue_lock);
276 fpga_queue(card, prm.port, skb, NULL);
278 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
280 spin_lock_irq(&card->param_queue_lock);
282 spin_unlock_irq(&card->param_queue_lock);
291 /* Sometimes it has a newline, sometimes it doesn't. */
292 if (skb->data[buflen - 1] == '\n')
295 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
297 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
300 /* We know we have enough space allocated for this; we allocated
302 skb->data[buflen] = 0;
304 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
313 static char *next_string(struct sk_buff *skb)
316 char *this = skb->data;
318 for (i = 0; i < skb->len; i++) {
319 if (this[i] == '\n') {
321 skb_pull(skb, i + 1);
324 if (!isprint(this[i]))
331 * Status packet has fields separated by \n, starting with a version number
332 * for the information therein. Fields are....
335 * RxBitRate (version >= 1)
336 * TxBitRate (version >= 1)
337 * State (version >= 1)
338 * LocalSNRMargin (version >= 1)
339 * LocalLineAttn (version >= 1)
341 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
343 char *str, *end, *state_str, *snr, *attn;
344 int ver, rate_up, rate_down;
346 if (!card->atmdev[port])
349 str = next_string(skb);
353 ver = simple_strtol(str, NULL, 10);
355 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
360 str = next_string(skb);
363 if (!strcmp(str, "ERROR")) {
364 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
369 rate_down = simple_strtol(str, &end, 10);
373 str = next_string(skb);
376 rate_up = simple_strtol(str, &end, 10);
380 state_str = next_string(skb);
384 /* Anything but 'Showtime' is down */
385 if (strcmp(state_str, "Showtime")) {
386 atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_LOST);
387 release_vccs(card->atmdev[port]);
388 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
392 snr = next_string(skb);
395 attn = next_string(skb);
399 dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
400 port, state_str, rate_down/1000, rate_up/1000,
401 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
403 card->atmdev[port]->link_rate = rate_down / 424;
404 atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_FOUND);
409 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
411 struct solos_param *prm;
419 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
420 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
421 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
422 skb->data[6] != '\n')
425 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
427 spin_lock_irqsave(&card->param_queue_lock, flags);
428 list_for_each_entry(prm, &card->param_queue, list) {
429 if (prm->port == port && prm->pid == cmdpid) {
432 wake_up(&card->param_wq);
437 spin_unlock_irqrestore(&card->param_queue_lock, flags);
441 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
444 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
445 struct solos_card *card = atmdev->dev_data;
449 spin_lock(&card->cli_queue_lock);
450 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
451 spin_unlock(&card->cli_queue_lock);
453 return sprintf(buf, "No data.\n");
456 memcpy(buf, skb->data, len);
457 dev_dbg(&card->dev->dev, "len: %d\n", len);
463 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
466 struct pkt_hdr *header;
468 if (size > (BUF_SIZE - sizeof(*header))) {
469 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
472 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
474 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
478 header = (void *)skb_put(skb, sizeof(*header));
480 header->size = cpu_to_le16(size);
481 header->vpi = cpu_to_le16(0);
482 header->vci = cpu_to_le16(0);
483 header->type = cpu_to_le16(PKT_COMMAND);
485 memcpy(skb_put(skb, size), buf, size);
487 fpga_queue(card, dev, skb, NULL);
492 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
493 const char *buf, size_t count)
495 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
496 struct solos_card *card = atmdev->dev_data;
499 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
504 static DEVICE_ATTR(console, 0644, console_show, console_store);
507 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
508 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
510 #include "solos-attrlist.c"
515 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
516 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
518 static struct attribute *solos_attrs[] = {
519 #include "solos-attrlist.c"
523 static struct attribute_group solos_attr_group = {
524 .attrs = solos_attrs,
525 .name = "parameters",
528 static int flash_upgrade(struct solos_card *card, int chip)
530 const struct firmware *fw;
539 fw_name = "solos-FPGA.bin";
540 blocksize = FPGA_BLOCK;
543 fw_name = "solos-Firmware.bin";
544 blocksize = SOLOS_BLOCK;
547 if (card->fpga_version > LEGACY_BUFFERS){
548 fw_name = "solos-db-FPGA.bin";
549 blocksize = FPGA_BLOCK;
551 dev_info(&card->dev->dev, "FPGA version doesn't support"
552 " daughter board upgrades\n");
557 if (card->fpga_version > LEGACY_BUFFERS){
558 fw_name = "solos-Firmware.bin";
559 blocksize = SOLOS_BLOCK;
561 dev_info(&card->dev->dev, "FPGA version doesn't support"
562 " daughter board upgrades\n");
570 if (request_firmware(&fw, fw_name, &card->dev->dev))
573 dev_info(&card->dev->dev, "Flash upgrade starting\n");
575 numblocks = fw->size / blocksize;
576 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
577 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
579 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
580 iowrite32(1, card->config_regs + FPGA_MODE);
581 data32 = ioread32(card->config_regs + FPGA_MODE);
583 /* Set mode to Chip Erase */
584 if(chip == 0 || chip == 2)
585 dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
586 if(chip == 1 || chip == 3)
587 dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
588 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
591 iowrite32(1, card->config_regs + WRITE_FLASH);
592 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
594 for (offset = 0; offset < fw->size; offset += blocksize) {
597 /* Clear write flag */
598 iowrite32(0, card->config_regs + WRITE_FLASH);
600 /* Set mode to Block Write */
601 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
602 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
604 /* Copy block to buffer, swapping each 16 bits */
605 for(i = 0; i < blocksize; i += 4) {
606 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
607 if(card->fpga_version > LEGACY_BUFFERS)
608 iowrite32(word, FLASH_BUF + i);
610 iowrite32(word, RX_BUF(card, 3) + i);
613 /* Specify block number and then trigger flash write */
614 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
615 iowrite32(1, card->config_regs + WRITE_FLASH);
616 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
619 release_firmware(fw);
620 iowrite32(0, card->config_regs + WRITE_FLASH);
621 iowrite32(0, card->config_regs + FPGA_MODE);
622 iowrite32(0, card->config_regs + FLASH_MODE);
623 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
627 static irqreturn_t solos_irq(int irq, void *dev_id)
629 struct solos_card *card = dev_id;
632 iowrite32(0, card->config_regs + IRQ_CLEAR);
634 /* If we're up and running, just kick the tasklet to process TX/RX */
636 tasklet_schedule(&card->tlet);
638 wake_up(&card->fw_wq);
640 return IRQ_RETVAL(handled);
643 void solos_bh(unsigned long card_arg)
645 struct solos_card *card = (void *)card_arg;
647 uint32_t rx_done = 0;
651 * Since fpga_tx() is going to need to read the flags under its lock,
652 * it can return them to us so that we don't have to hit PCI MMIO
653 * again for the same information
655 card_flags = fpga_tx(card);
657 for (port = 0; port < card->nr_ports; port++) {
658 if (card_flags & (0x10 << port)) {
659 struct pkt_hdr _hdr, *header;
664 if (card->using_dma) {
665 skb = card->rx_skb[port];
666 card->rx_skb[port] = NULL;
668 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
669 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
671 header = (void *)skb->data;
672 size = le16_to_cpu(header->size);
673 skb_put(skb, size + sizeof(*header));
674 skb_pull(skb, sizeof(*header));
678 rx_done |= 0x10 << port;
680 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
682 size = le16_to_cpu(header->size);
683 if (size > (card->buffer_size - sizeof(*header))){
684 dev_warn(&card->dev->dev, "Invalid buffer size\n");
688 skb = alloc_skb(size + 1, GFP_ATOMIC);
691 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
695 memcpy_fromio(skb_put(skb, size),
696 RX_BUF(card, port) + sizeof(*header),
700 dev_info(&card->dev->dev, "Received: device %d\n", port);
701 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
702 size, le16_to_cpu(header->vpi),
703 le16_to_cpu(header->vci));
707 switch (le16_to_cpu(header->type)) {
709 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
710 le16_to_cpu(header->vci));
713 dev_warn(&card->dev->dev, "Received packet for unknown VPI.VCI %d.%d on port %d\n",
714 le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
718 atm_charge(vcc, skb->truesize);
720 atomic_inc(&vcc->stats->rx);
724 if (process_status(card, port, skb) &&
726 dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
729 dev_kfree_skb_any(skb);
733 default: /* FIXME: Not really, surely? */
734 if (process_command(card, port, skb))
736 spin_lock(&card->cli_queue_lock);
737 if (skb_queue_len(&card->cli_queue[port]) > 10) {
739 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
741 dev_kfree_skb_any(skb);
743 skb_queue_tail(&card->cli_queue[port], skb);
744 spin_unlock(&card->cli_queue_lock);
748 /* Allocate RX skbs for any ports which need them */
749 if (card->using_dma && card->atmdev[port] &&
750 !card->rx_skb[port]) {
751 struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
753 SKB_CB(skb)->dma_addr =
754 pci_map_single(card->dev, skb->data,
755 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
756 iowrite32(SKB_CB(skb)->dma_addr,
757 card->config_regs + RX_DMA_ADDR(port));
758 card->rx_skb[port] = skb;
761 dev_warn(&card->dev->dev, "Failed to allocate RX skb");
763 /* We'll have to try again later */
764 tasklet_schedule(&card->tlet);
769 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
774 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
776 struct hlist_head *head;
777 struct atm_vcc *vcc = NULL;
778 struct hlist_node *node;
781 read_lock(&vcc_sklist_lock);
782 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
783 sk_for_each(s, node, head) {
785 if (vcc->dev == dev && vcc->vci == vci &&
786 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE &&
787 test_bit(ATM_VF_READY, &vcc->flags))
792 read_unlock(&vcc_sklist_lock);
796 static int list_vccs(int vci)
798 struct hlist_head *head;
800 struct hlist_node *node;
805 read_lock(&vcc_sklist_lock);
807 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
808 sk_for_each(s, node, head) {
811 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
817 for(i = 0; i < VCC_HTABLE_SIZE; i++){
819 sk_for_each(s, node, head) {
822 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
829 read_unlock(&vcc_sklist_lock);
833 static void release_vccs(struct atm_dev *dev)
837 write_lock_irq(&vcc_sklist_lock);
838 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
839 struct hlist_head *head = &vcc_hash[i];
840 struct hlist_node *node, *tmp;
844 sk_for_each_safe(s, node, tmp, head) {
846 if (vcc->dev == dev) {
847 vcc_release_async(vcc, -EPIPE);
852 write_unlock_irq(&vcc_sklist_lock);
856 static int popen(struct atm_vcc *vcc)
858 struct solos_card *card = vcc->dev->dev_data;
860 struct pkt_hdr *header;
862 if (vcc->qos.aal != ATM_AAL5) {
863 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
868 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
871 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
874 header = (void *)skb_put(skb, sizeof(*header));
876 header->size = cpu_to_le16(0);
877 header->vpi = cpu_to_le16(vcc->vpi);
878 header->vci = cpu_to_le16(vcc->vci);
879 header->type = cpu_to_le16(PKT_POPEN);
881 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
883 set_bit(ATM_VF_ADDR, &vcc->flags);
884 set_bit(ATM_VF_READY, &vcc->flags);
891 static void pclose(struct atm_vcc *vcc)
893 struct solos_card *card = vcc->dev->dev_data;
895 struct pkt_hdr *header;
897 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
899 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
902 header = (void *)skb_put(skb, sizeof(*header));
904 header->size = cpu_to_le16(0);
905 header->vpi = cpu_to_le16(vcc->vpi);
906 header->vci = cpu_to_le16(vcc->vci);
907 header->type = cpu_to_le16(PKT_PCLOSE);
909 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
911 clear_bit(ATM_VF_ADDR, &vcc->flags);
912 clear_bit(ATM_VF_READY, &vcc->flags);
914 /* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
915 tasklet has finished processing any incoming packets (and, more to
916 the point, using the vcc pointer). */
917 tasklet_unlock_wait(&card->tlet);
921 static int print_buffer(struct sk_buff *buf)
928 for (i = 0; i < len; i++){
930 sprintf(msg, "%02X: ", i);
932 sprintf(item,"%02X ",*(buf->data + i));
937 printk(KERN_DEBUG "%s", msg);
943 printk(KERN_DEBUG "%s", msg);
945 printk(KERN_DEBUG "\n");
950 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
956 SKB_CB(skb)->vcc = vcc;
958 spin_lock_irqsave(&card->tx_queue_lock, flags);
959 old_len = skb_queue_len(&card->tx_queue[port]);
960 skb_queue_tail(&card->tx_queue[port], skb);
962 card->tx_mask |= (1 << port);
963 spin_unlock_irqrestore(&card->tx_queue_lock, flags);
965 /* Theoretically we could just schedule the tasklet here, but
966 that introduces latency we don't want -- it's noticeable */
971 static uint32_t fpga_tx(struct solos_card *card)
973 uint32_t tx_pending, card_flags;
974 uint32_t tx_started = 0;
980 spin_lock_irqsave(&card->tx_lock, flags);
982 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
984 * The queue lock is required for _writing_ to tx_mask, but we're
985 * OK to read it here without locking. The only potential update
986 * that we could race with is in fpga_queue() where it sets a bit
987 * for a new port... but it's going to call this function again if
988 * it's doing that, anyway.
990 tx_pending = card->tx_mask & ~card_flags;
992 for (port = 0; tx_pending; tx_pending >>= 1, port++) {
993 if (tx_pending & 1) {
994 struct sk_buff *oldskb = card->tx_skb[port];
996 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
997 oldskb->len, PCI_DMA_TODEVICE);
999 spin_lock(&card->tx_queue_lock);
1000 skb = skb_dequeue(&card->tx_queue[port]);
1002 card->tx_mask &= ~(1 << port);
1003 spin_unlock(&card->tx_queue_lock);
1005 if (skb && !card->using_dma) {
1006 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
1007 tx_started |= 1 << port;
1008 oldskb = skb; /* We're done with this skb already */
1009 } else if (skb && card->using_dma) {
1010 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
1011 skb->len, PCI_DMA_TODEVICE);
1012 iowrite32(SKB_CB(skb)->dma_addr,
1013 card->config_regs + TX_DMA_ADDR(port));
1019 /* Clean up and free oldskb now it's gone */
1021 dev_info(&card->dev->dev, "Transmitted: port %d\n",
1023 print_buffer(oldskb);
1026 vcc = SKB_CB(oldskb)->vcc;
1029 atomic_inc(&vcc->stats->tx);
1030 solos_pop(vcc, oldskb);
1032 dev_kfree_skb_irq(oldskb);
1036 /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1038 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1040 spin_unlock_irqrestore(&card->tx_lock, flags);
1044 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1046 struct solos_card *card = vcc->dev->dev_data;
1047 struct pkt_hdr *header;
1051 if (pktlen > (BUF_SIZE - sizeof(*header))) {
1052 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1053 solos_pop(vcc, skb);
1057 if (!skb_clone_writable(skb, sizeof(*header))) {
1061 if (skb_headroom(skb) < sizeof(*header))
1062 expand_by = sizeof(*header) - skb_headroom(skb);
1064 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1066 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1067 solos_pop(vcc, skb);
1072 header = (void *)skb_push(skb, sizeof(*header));
1074 /* This does _not_ include the size of the header */
1075 header->size = cpu_to_le16(pktlen);
1076 header->vpi = cpu_to_le16(vcc->vpi);
1077 header->vci = cpu_to_le16(vcc->vci);
1078 header->type = cpu_to_le16(PKT_DATA);
1080 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1085 static struct atmdev_ops fpga_ops = {
1097 .owner = THIS_MODULE
1100 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1104 uint8_t major_ver, minor_ver;
1106 struct solos_card *card;
1108 card = kzalloc(sizeof(*card), GFP_KERNEL);
1113 init_waitqueue_head(&card->fw_wq);
1114 init_waitqueue_head(&card->param_wq);
1116 err = pci_enable_device(dev);
1118 dev_warn(&dev->dev, "Failed to enable PCI device\n");
1122 err = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
1124 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1128 err = pci_request_regions(dev, "solos");
1130 dev_warn(&dev->dev, "Failed to request regions\n");
1134 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1135 if (!card->config_regs) {
1136 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1137 goto out_release_regions;
1139 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1140 if (!card->buffers) {
1141 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1142 goto out_unmap_config;
1146 iowrite32(1, card->config_regs + FPGA_MODE);
1147 data32 = ioread32(card->config_regs + FPGA_MODE);
1149 iowrite32(0, card->config_regs + FPGA_MODE);
1150 data32 = ioread32(card->config_regs + FPGA_MODE);
1153 data32 = ioread32(card->config_regs + FPGA_VER);
1154 fpga_ver = (data32 & 0x0000FFFF);
1155 major_ver = ((data32 & 0xFF000000) >> 24);
1156 minor_ver = ((data32 & 0x00FF0000) >> 16);
1157 card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1158 if (card->fpga_version > LEGACY_BUFFERS)
1159 card->buffer_size = BUF_SIZE;
1161 card->buffer_size = OLD_BUF_SIZE;
1162 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1163 major_ver, minor_ver, fpga_ver);
1165 if (fpga_ver < 37 && (fpga_upgrade || firmware_upgrade ||
1166 db_fpga_upgrade || db_firmware_upgrade)) {
1168 "FPGA too old; cannot upgrade flash. Use JTAG.\n");
1169 fpga_upgrade = firmware_upgrade = 0;
1170 db_fpga_upgrade = db_firmware_upgrade = 0;
1173 if (card->fpga_version >= DMA_SUPPORTED){
1174 card->using_dma = 1;
1176 card->using_dma = 0;
1177 /* Set RX empty flag for all ports */
1178 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1181 data32 = ioread32(card->config_regs + PORTS);
1182 card->nr_ports = (data32 & 0x000000FF);
1184 pci_set_drvdata(dev, card);
1186 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1187 spin_lock_init(&card->tx_lock);
1188 spin_lock_init(&card->tx_queue_lock);
1189 spin_lock_init(&card->cli_queue_lock);
1190 spin_lock_init(&card->param_queue_lock);
1191 INIT_LIST_HEAD(&card->param_queue);
1193 err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1196 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1197 goto out_unmap_both;
1200 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1203 flash_upgrade(card, 0);
1205 if (firmware_upgrade)
1206 flash_upgrade(card, 1);
1208 if (db_fpga_upgrade)
1209 flash_upgrade(card, 2);
1211 if (db_firmware_upgrade)
1212 flash_upgrade(card, 3);
1214 err = atm_init(card, &dev->dev);
1221 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1222 free_irq(dev->irq, card);
1223 tasklet_kill(&card->tlet);
1226 pci_set_drvdata(dev, NULL);
1227 pci_iounmap(dev, card->config_regs);
1229 pci_iounmap(dev, card->buffers);
1230 out_release_regions:
1231 pci_release_regions(dev);
1237 static int atm_init(struct solos_card *card, struct device *parent)
1241 for (i = 0; i < card->nr_ports; i++) {
1242 struct sk_buff *skb;
1243 struct pkt_hdr *header;
1245 skb_queue_head_init(&card->tx_queue[i]);
1246 skb_queue_head_init(&card->cli_queue[i]);
1248 card->atmdev[i] = atm_dev_register("solos-pci", parent, &fpga_ops, -1, NULL);
1249 if (!card->atmdev[i]) {
1250 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1254 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1255 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1256 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1257 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1259 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1261 card->atmdev[i]->ci_range.vpi_bits = 8;
1262 card->atmdev[i]->ci_range.vci_bits = 16;
1263 card->atmdev[i]->dev_data = card;
1264 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1265 atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_UNKNOWN);
1267 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1269 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1273 header = (void *)skb_put(skb, sizeof(*header));
1275 header->size = cpu_to_le16(0);
1276 header->vpi = cpu_to_le16(0);
1277 header->vci = cpu_to_le16(0);
1278 header->type = cpu_to_le16(PKT_STATUS);
1280 fpga_queue(card, i, skb, NULL);
1285 static void atm_remove(struct solos_card *card)
1289 for (i = 0; i < card->nr_ports; i++) {
1290 if (card->atmdev[i]) {
1291 struct sk_buff *skb;
1293 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1295 sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1296 atm_dev_deregister(card->atmdev[i]);
1298 skb = card->rx_skb[i];
1300 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1301 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
1304 skb = card->tx_skb[i];
1306 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1307 skb->len, PCI_DMA_TODEVICE);
1310 while ((skb = skb_dequeue(&card->tx_queue[i])))
1317 static void fpga_remove(struct pci_dev *dev)
1319 struct solos_card *card = pci_get_drvdata(dev);
1322 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1325 iowrite32(1, card->config_regs + FPGA_MODE);
1326 (void)ioread32(card->config_regs + FPGA_MODE);
1330 free_irq(dev->irq, card);
1331 tasklet_kill(&card->tlet);
1333 /* Release device from reset */
1334 iowrite32(0, card->config_regs + FPGA_MODE);
1335 (void)ioread32(card->config_regs + FPGA_MODE);
1337 pci_iounmap(dev, card->buffers);
1338 pci_iounmap(dev, card->config_regs);
1340 pci_release_regions(dev);
1341 pci_disable_device(dev);
1343 pci_set_drvdata(dev, NULL);
1347 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1348 { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1352 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1354 static struct pci_driver fpga_driver = {
1356 .id_table = fpga_pci_tbl,
1357 .probe = fpga_probe,
1358 .remove = fpga_remove,
1362 static int __init solos_pci_init(void)
1364 printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1365 return pci_register_driver(&fpga_driver);
1368 static void __exit solos_pci_exit(void)
1370 pci_unregister_driver(&fpga_driver);
1371 printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1374 module_init(solos_pci_init);
1375 module_exit(solos_pci_exit);