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 FPGA_PAGE 528 /* FPGA flash page size*/
64 #define SOLOS_PAGE 512 /* Solos flash page size*/
65 #define FPGA_BLOCK (FPGA_PAGE * 8) /* FPGA flash block size*/
66 #define SOLOS_BLOCK (SOLOS_PAGE * 8) /* Solos flash block size*/
68 #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
69 #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
71 #define RX_DMA_SIZE 2048
74 static int atmdebug = 0;
75 static int firmware_upgrade = 0;
76 static int fpga_upgrade = 0;
91 #define SKB_CB(skb) ((struct solos_skb_cb *)skb->cb)
100 void __iomem *config_regs;
101 void __iomem *buffers;
105 struct atm_dev *atmdev[4];
106 struct tasklet_struct tlet;
108 spinlock_t tx_queue_lock;
109 spinlock_t cli_queue_lock;
110 spinlock_t param_queue_lock;
111 struct list_head param_queue;
112 struct sk_buff_head tx_queue[4];
113 struct sk_buff_head cli_queue[4];
114 struct sk_buff *tx_skb[4];
115 struct sk_buff *rx_skb[4];
116 wait_queue_head_t param_wq;
117 wait_queue_head_t fw_wq;
123 struct list_head list;
126 struct sk_buff *response;
129 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
131 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
132 MODULE_DESCRIPTION("Solos PCI driver");
133 MODULE_VERSION(VERSION);
134 MODULE_LICENSE("GPL");
135 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
136 MODULE_PARM_DESC(atmdebug, "Print ATM data");
137 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
138 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
139 module_param(reset, int, 0444);
140 module_param(atmdebug, int, 0644);
141 module_param(firmware_upgrade, int, 0444);
142 module_param(fpga_upgrade, int, 0444);
144 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
145 struct atm_vcc *vcc);
146 static uint32_t fpga_tx(struct solos_card *);
147 static irqreturn_t solos_irq(int irq, void *dev_id);
148 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
149 static int list_vccs(int vci);
150 static void release_vccs(struct atm_dev *dev);
151 static int atm_init(struct solos_card *);
152 static void atm_remove(struct solos_card *);
153 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
154 static void solos_bh(unsigned long);
155 static int print_buffer(struct sk_buff *buf);
157 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
162 dev_kfree_skb_any(skb);
165 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
168 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
169 struct solos_card *card = atmdev->dev_data;
170 struct solos_param prm;
172 struct pkt_hdr *header;
175 buflen = strlen(attr->attr.name) + 10;
177 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
179 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
183 header = (void *)skb_put(skb, sizeof(*header));
185 buflen = snprintf((void *)&header[1], buflen - 1,
186 "L%05d\n%s\n", current->pid, attr->attr.name);
187 skb_put(skb, buflen);
189 header->size = cpu_to_le16(buflen);
190 header->vpi = cpu_to_le16(0);
191 header->vci = cpu_to_le16(0);
192 header->type = cpu_to_le16(PKT_COMMAND);
194 prm.pid = current->pid;
196 prm.port = SOLOS_CHAN(atmdev);
198 spin_lock_irq(&card->param_queue_lock);
199 list_add(&prm.list, &card->param_queue);
200 spin_unlock_irq(&card->param_queue_lock);
202 fpga_queue(card, prm.port, skb, NULL);
204 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
206 spin_lock_irq(&card->param_queue_lock);
208 spin_unlock_irq(&card->param_queue_lock);
213 buflen = prm.response->len;
214 memcpy(buf, prm.response->data, buflen);
215 kfree_skb(prm.response);
220 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
221 const char *buf, size_t count)
223 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
224 struct solos_card *card = atmdev->dev_data;
225 struct solos_param prm;
227 struct pkt_hdr *header;
231 buflen = strlen(attr->attr.name) + 11 + count;
233 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
235 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
239 header = (void *)skb_put(skb, sizeof(*header));
241 buflen = snprintf((void *)&header[1], buflen - 1,
242 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
244 skb_put(skb, buflen);
245 header->size = cpu_to_le16(buflen);
246 header->vpi = cpu_to_le16(0);
247 header->vci = cpu_to_le16(0);
248 header->type = cpu_to_le16(PKT_COMMAND);
250 prm.pid = current->pid;
252 prm.port = SOLOS_CHAN(atmdev);
254 spin_lock_irq(&card->param_queue_lock);
255 list_add(&prm.list, &card->param_queue);
256 spin_unlock_irq(&card->param_queue_lock);
258 fpga_queue(card, prm.port, skb, NULL);
260 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
262 spin_lock_irq(&card->param_queue_lock);
264 spin_unlock_irq(&card->param_queue_lock);
273 /* Sometimes it has a newline, sometimes it doesn't. */
274 if (skb->data[buflen - 1] == '\n')
277 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
279 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
282 /* We know we have enough space allocated for this; we allocated
284 skb->data[buflen] = 0;
286 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
295 static char *next_string(struct sk_buff *skb)
298 char *this = skb->data;
300 for (i = 0; i < skb->len; i++) {
301 if (this[i] == '\n') {
303 skb_pull(skb, i + 1);
306 if (!isprint(this[i]))
313 * Status packet has fields separated by \n, starting with a version number
314 * for the information therein. Fields are....
317 * RxBitRate (version >= 1)
318 * TxBitRate (version >= 1)
319 * State (version >= 1)
320 * LocalSNRMargin (version >= 1)
321 * LocalLineAttn (version >= 1)
323 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
325 char *str, *end, *state_str, *snr, *attn;
326 int ver, rate_up, rate_down;
328 if (!card->atmdev[port])
331 str = next_string(skb);
335 ver = simple_strtol(str, NULL, 10);
337 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
342 str = next_string(skb);
345 if (!strcmp(str, "ERROR")) {
346 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
351 rate_down = simple_strtol(str, &end, 10);
355 str = next_string(skb);
358 rate_up = simple_strtol(str, &end, 10);
362 state_str = next_string(skb);
366 /* Anything but 'Showtime' is down */
367 if (strcmp(state_str, "Showtime")) {
368 card->atmdev[port]->signal = ATM_PHY_SIG_LOST;
369 release_vccs(card->atmdev[port]);
370 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
374 snr = next_string(skb);
377 attn = next_string(skb);
381 dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
382 port, state_str, rate_down/1000, rate_up/1000,
383 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
385 card->atmdev[port]->link_rate = rate_down / 424;
386 card->atmdev[port]->signal = ATM_PHY_SIG_FOUND;
391 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
393 struct solos_param *prm;
401 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
402 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
403 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
404 skb->data[6] != '\n')
407 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
409 spin_lock_irqsave(&card->param_queue_lock, flags);
410 list_for_each_entry(prm, &card->param_queue, list) {
411 if (prm->port == port && prm->pid == cmdpid) {
414 wake_up(&card->param_wq);
419 spin_unlock_irqrestore(&card->param_queue_lock, flags);
423 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
426 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
427 struct solos_card *card = atmdev->dev_data;
430 spin_lock(&card->cli_queue_lock);
431 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
432 spin_unlock(&card->cli_queue_lock);
434 return sprintf(buf, "No data.\n");
436 memcpy(buf, skb->data, skb->len);
437 dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
443 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
446 struct pkt_hdr *header;
448 if (size > (BUF_SIZE - sizeof(*header))) {
449 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
452 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
454 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
458 header = (void *)skb_put(skb, sizeof(*header));
460 header->size = cpu_to_le16(size);
461 header->vpi = cpu_to_le16(0);
462 header->vci = cpu_to_le16(0);
463 header->type = cpu_to_le16(PKT_COMMAND);
465 memcpy(skb_put(skb, size), buf, size);
467 fpga_queue(card, dev, skb, NULL);
472 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
473 const char *buf, size_t count)
475 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
476 struct solos_card *card = atmdev->dev_data;
479 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
484 static DEVICE_ATTR(console, 0644, console_show, console_store);
487 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
488 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
490 #include "solos-attrlist.c"
495 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
496 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
498 static struct attribute *solos_attrs[] = {
499 #include "solos-attrlist.c"
503 static struct attribute_group solos_attr_group = {
504 .attrs = solos_attrs,
505 .name = "parameters",
508 static int flash_upgrade(struct solos_card *card, int chip)
510 const struct firmware *fw;
518 fw_name = "solos-FPGA.bin";
519 blocksize = FPGA_BLOCK;
521 fw_name = "solos-Firmware.bin";
522 blocksize = SOLOS_BLOCK;
525 if (request_firmware(&fw, fw_name, &card->dev->dev))
528 dev_info(&card->dev->dev, "Flash upgrade starting\n");
530 numblocks = fw->size / blocksize;
531 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
532 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
534 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
535 iowrite32(1, card->config_regs + FPGA_MODE);
536 data32 = ioread32(card->config_regs + FPGA_MODE);
538 /* Set mode to Chip Erase */
539 dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
540 chip?"Solos":"FPGA");
541 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
544 iowrite32(1, card->config_regs + WRITE_FLASH);
545 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
547 for (offset = 0; offset < fw->size; offset += blocksize) {
550 /* Clear write flag */
551 iowrite32(0, card->config_regs + WRITE_FLASH);
553 /* Set mode to Block Write */
554 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
555 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
557 /* Copy block to buffer, swapping each 16 bits */
558 for(i = 0; i < blocksize; i += 4) {
559 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
560 iowrite32(word, RX_BUF(card, 3) + i);
563 /* Specify block number and then trigger flash write */
564 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
565 iowrite32(1, card->config_regs + WRITE_FLASH);
566 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
569 release_firmware(fw);
570 iowrite32(0, card->config_regs + WRITE_FLASH);
571 iowrite32(0, card->config_regs + FPGA_MODE);
572 iowrite32(0, card->config_regs + FLASH_MODE);
573 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
577 static irqreturn_t solos_irq(int irq, void *dev_id)
579 struct solos_card *card = dev_id;
582 iowrite32(0, card->config_regs + IRQ_CLEAR);
584 /* If we're up and running, just kick the tasklet to process TX/RX */
586 tasklet_schedule(&card->tlet);
588 wake_up(&card->fw_wq);
590 return IRQ_RETVAL(handled);
593 void solos_bh(unsigned long card_arg)
595 struct solos_card *card = (void *)card_arg;
597 uint32_t rx_done = 0;
601 * Since fpga_tx() is going to need to read the flags under its lock,
602 * it can return them to us so that we don't have to hit PCI MMIO
603 * again for the same information
605 card_flags = fpga_tx(card);
607 for (port = 0; port < card->nr_ports; port++) {
608 if (card_flags & (0x10 << port)) {
609 struct pkt_hdr _hdr, *header;
614 if (card->using_dma) {
615 skb = card->rx_skb[port];
616 card->rx_skb[port] = NULL;
618 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
619 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
621 header = (void *)skb->data;
622 size = le16_to_cpu(header->size);
623 skb_put(skb, size + sizeof(*header));
624 skb_pull(skb, sizeof(*header));
628 rx_done |= 0x10 << port;
630 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
632 size = le16_to_cpu(header->size);
634 skb = alloc_skb(size + 1, GFP_ATOMIC);
637 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
641 memcpy_fromio(skb_put(skb, size),
642 RX_BUF(card, port) + sizeof(*header),
646 dev_info(&card->dev->dev, "Received: device %d\n", port);
647 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
648 size, le16_to_cpu(header->vpi),
649 le16_to_cpu(header->vci));
653 switch (le16_to_cpu(header->type)) {
655 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
656 le16_to_cpu(header->vci));
659 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
660 le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
664 atm_charge(vcc, skb->truesize);
666 atomic_inc(&vcc->stats->rx);
670 if (process_status(card, port, skb) &&
672 dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
675 dev_kfree_skb_any(skb);
679 default: /* FIXME: Not really, surely? */
680 if (process_command(card, port, skb))
682 spin_lock(&card->cli_queue_lock);
683 if (skb_queue_len(&card->cli_queue[port]) > 10) {
685 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
687 dev_kfree_skb_any(skb);
689 skb_queue_tail(&card->cli_queue[port], skb);
690 spin_unlock(&card->cli_queue_lock);
694 /* Allocate RX skbs for any ports which need them */
695 if (card->using_dma && card->atmdev[port] &&
696 !card->rx_skb[port]) {
697 struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
699 SKB_CB(skb)->dma_addr =
700 pci_map_single(card->dev, skb->data,
701 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
702 iowrite32(SKB_CB(skb)->dma_addr,
703 card->config_regs + RX_DMA_ADDR(port));
704 card->rx_skb[port] = skb;
707 dev_warn(&card->dev->dev, "Failed to allocate RX skb");
709 /* We'll have to try again later */
710 tasklet_schedule(&card->tlet);
715 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
720 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
722 struct hlist_head *head;
723 struct atm_vcc *vcc = NULL;
724 struct hlist_node *node;
727 read_lock(&vcc_sklist_lock);
728 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
729 sk_for_each(s, node, head) {
731 if (vcc->dev == dev && vcc->vci == vci &&
732 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
737 read_unlock(&vcc_sklist_lock);
741 static int list_vccs(int vci)
743 struct hlist_head *head;
745 struct hlist_node *node;
750 read_lock(&vcc_sklist_lock);
752 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
753 sk_for_each(s, node, head) {
756 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
762 for(i = 0; i < VCC_HTABLE_SIZE; i++){
764 sk_for_each(s, node, head) {
767 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
774 read_unlock(&vcc_sklist_lock);
778 static void release_vccs(struct atm_dev *dev)
782 write_lock_irq(&vcc_sklist_lock);
783 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
784 struct hlist_head *head = &vcc_hash[i];
785 struct hlist_node *node, *tmp;
789 sk_for_each_safe(s, node, tmp, head) {
791 if (vcc->dev == dev) {
792 vcc_release_async(vcc, -EPIPE);
797 write_unlock_irq(&vcc_sklist_lock);
801 static int popen(struct atm_vcc *vcc)
803 struct solos_card *card = vcc->dev->dev_data;
805 struct pkt_hdr *header;
807 if (vcc->qos.aal != ATM_AAL5) {
808 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
813 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
814 if (!skb && net_ratelimit()) {
815 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
818 header = (void *)skb_put(skb, sizeof(*header));
820 header->size = cpu_to_le16(0);
821 header->vpi = cpu_to_le16(vcc->vpi);
822 header->vci = cpu_to_le16(vcc->vci);
823 header->type = cpu_to_le16(PKT_POPEN);
825 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
827 set_bit(ATM_VF_ADDR, &vcc->flags);
828 set_bit(ATM_VF_READY, &vcc->flags);
835 static void pclose(struct atm_vcc *vcc)
837 struct solos_card *card = vcc->dev->dev_data;
839 struct pkt_hdr *header;
841 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
843 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
846 header = (void *)skb_put(skb, sizeof(*header));
848 header->size = cpu_to_le16(0);
849 header->vpi = cpu_to_le16(vcc->vpi);
850 header->vci = cpu_to_le16(vcc->vci);
851 header->type = cpu_to_le16(PKT_PCLOSE);
853 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
855 clear_bit(ATM_VF_ADDR, &vcc->flags);
856 clear_bit(ATM_VF_READY, &vcc->flags);
861 static int print_buffer(struct sk_buff *buf)
868 for (i = 0; i < len; i++){
870 sprintf(msg, "%02X: ", i);
872 sprintf(item,"%02X ",*(buf->data + i));
877 printk(KERN_DEBUG "%s", msg);
883 printk(KERN_DEBUG "%s", msg);
885 printk(KERN_DEBUG "\n");
890 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
896 SKB_CB(skb)->vcc = vcc;
898 spin_lock_irqsave(&card->tx_queue_lock, flags);
899 old_len = skb_queue_len(&card->tx_queue[port]);
900 skb_queue_tail(&card->tx_queue[port], skb);
902 card->tx_mask |= (1 << port);
903 spin_unlock_irqrestore(&card->tx_queue_lock, flags);
905 /* Theoretically we could just schedule the tasklet here, but
906 that introduces latency we don't want -- it's noticeable */
911 static uint32_t fpga_tx(struct solos_card *card)
913 uint32_t tx_pending, card_flags;
914 uint32_t tx_started = 0;
920 spin_lock_irqsave(&card->tx_lock, flags);
922 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
924 * The queue lock is required for _writing_ to tx_mask, but we're
925 * OK to read it here without locking. The only potential update
926 * that we could race with is in fpga_queue() where it sets a bit
927 * for a new port... but it's going to call this function again if
928 * it's doing that, anyway.
930 tx_pending = card->tx_mask & ~card_flags;
932 for (port = 0; tx_pending; tx_pending >>= 1, port++) {
933 if (tx_pending & 1) {
934 struct sk_buff *oldskb = card->tx_skb[port];
936 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
937 oldskb->len, PCI_DMA_TODEVICE);
939 spin_lock(&card->tx_queue_lock);
940 skb = skb_dequeue(&card->tx_queue[port]);
942 card->tx_mask &= ~(1 << port);
943 spin_unlock(&card->tx_queue_lock);
945 if (skb && !card->using_dma) {
946 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
947 tx_started |= 1 << port;
948 oldskb = skb; /* We're done with this skb already */
949 } else if (skb && card->using_dma) {
950 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
951 skb->len, PCI_DMA_TODEVICE);
952 iowrite32(SKB_CB(skb)->dma_addr,
953 card->config_regs + TX_DMA_ADDR(port));
959 /* Clean up and free oldskb now it's gone */
961 dev_info(&card->dev->dev, "Transmitted: port %d\n",
963 print_buffer(oldskb);
966 vcc = SKB_CB(oldskb)->vcc;
969 atomic_inc(&vcc->stats->tx);
970 solos_pop(vcc, oldskb);
972 dev_kfree_skb_irq(oldskb);
976 /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
978 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
980 spin_unlock_irqrestore(&card->tx_lock, flags);
984 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
986 struct solos_card *card = vcc->dev->dev_data;
987 struct pkt_hdr *header;
991 if (pktlen > (BUF_SIZE - sizeof(*header))) {
992 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
997 if (!skb_clone_writable(skb, sizeof(*header))) {
1001 if (skb_headroom(skb) < sizeof(*header))
1002 expand_by = sizeof(*header) - skb_headroom(skb);
1004 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1006 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1007 solos_pop(vcc, skb);
1012 header = (void *)skb_push(skb, sizeof(*header));
1014 /* This does _not_ include the size of the header */
1015 header->size = cpu_to_le16(pktlen);
1016 header->vpi = cpu_to_le16(vcc->vpi);
1017 header->vci = cpu_to_le16(vcc->vci);
1018 header->type = cpu_to_le16(PKT_DATA);
1020 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1025 static struct atmdev_ops fpga_ops = {
1037 .owner = THIS_MODULE
1040 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1044 uint8_t major_ver, minor_ver;
1046 struct solos_card *card;
1048 card = kzalloc(sizeof(*card), GFP_KERNEL);
1053 init_waitqueue_head(&card->fw_wq);
1054 init_waitqueue_head(&card->param_wq);
1056 err = pci_enable_device(dev);
1058 dev_warn(&dev->dev, "Failed to enable PCI device\n");
1062 err = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
1064 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1068 err = pci_request_regions(dev, "solos");
1070 dev_warn(&dev->dev, "Failed to request regions\n");
1074 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1075 if (!card->config_regs) {
1076 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1077 goto out_release_regions;
1079 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1080 if (!card->buffers) {
1081 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1082 goto out_unmap_config;
1086 iowrite32(1, card->config_regs + FPGA_MODE);
1087 data32 = ioread32(card->config_regs + FPGA_MODE);
1089 iowrite32(0, card->config_regs + FPGA_MODE);
1090 data32 = ioread32(card->config_regs + FPGA_MODE);
1093 data32 = ioread32(card->config_regs + FPGA_VER);
1094 fpga_ver = (data32 & 0x0000FFFF);
1095 major_ver = ((data32 & 0xFF000000) >> 24);
1096 minor_ver = ((data32 & 0x00FF0000) >> 16);
1097 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1098 major_ver, minor_ver, fpga_ver);
1100 if (0 && fpga_ver > 27)
1101 card->using_dma = 1;
1103 /* Set RX empty flag for all ports */
1104 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1107 data32 = ioread32(card->config_regs + PORTS);
1108 card->nr_ports = (data32 & 0x000000FF);
1110 pci_set_drvdata(dev, card);
1112 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1113 spin_lock_init(&card->tx_lock);
1114 spin_lock_init(&card->tx_queue_lock);
1115 spin_lock_init(&card->cli_queue_lock);
1116 spin_lock_init(&card->param_queue_lock);
1117 INIT_LIST_HEAD(&card->param_queue);
1119 err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1122 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1123 goto out_unmap_both;
1126 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1129 flash_upgrade(card, 0);
1131 if (firmware_upgrade)
1132 flash_upgrade(card, 1);
1134 err = atm_init(card);
1141 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1142 free_irq(dev->irq, card);
1143 tasklet_kill(&card->tlet);
1146 pci_set_drvdata(dev, NULL);
1147 pci_iounmap(dev, card->config_regs);
1149 pci_iounmap(dev, card->buffers);
1150 out_release_regions:
1151 pci_release_regions(dev);
1157 static int atm_init(struct solos_card *card)
1161 for (i = 0; i < card->nr_ports; i++) {
1162 struct sk_buff *skb;
1163 struct pkt_hdr *header;
1165 skb_queue_head_init(&card->tx_queue[i]);
1166 skb_queue_head_init(&card->cli_queue[i]);
1168 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1169 if (!card->atmdev[i]) {
1170 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1174 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1175 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1176 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1177 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1179 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1181 card->atmdev[i]->ci_range.vpi_bits = 8;
1182 card->atmdev[i]->ci_range.vci_bits = 16;
1183 card->atmdev[i]->dev_data = card;
1184 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1185 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1187 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1189 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1193 header = (void *)skb_put(skb, sizeof(*header));
1195 header->size = cpu_to_le16(0);
1196 header->vpi = cpu_to_le16(0);
1197 header->vci = cpu_to_le16(0);
1198 header->type = cpu_to_le16(PKT_STATUS);
1200 fpga_queue(card, i, skb, NULL);
1205 static void atm_remove(struct solos_card *card)
1209 for (i = 0; i < card->nr_ports; i++) {
1210 if (card->atmdev[i]) {
1211 struct sk_buff *skb;
1213 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1215 sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1216 atm_dev_deregister(card->atmdev[i]);
1218 skb = card->rx_skb[i];
1220 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1221 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
1224 skb = card->tx_skb[i];
1226 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1227 skb->len, PCI_DMA_TODEVICE);
1230 while ((skb = skb_dequeue(&card->tx_queue[i])))
1237 static void fpga_remove(struct pci_dev *dev)
1239 struct solos_card *card = pci_get_drvdata(dev);
1242 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1245 iowrite32(1, card->config_regs + FPGA_MODE);
1246 (void)ioread32(card->config_regs + FPGA_MODE);
1250 free_irq(dev->irq, card);
1251 tasklet_kill(&card->tlet);
1253 /* Release device from reset */
1254 iowrite32(0, card->config_regs + FPGA_MODE);
1255 (void)ioread32(card->config_regs + FPGA_MODE);
1257 pci_iounmap(dev, card->buffers);
1258 pci_iounmap(dev, card->config_regs);
1260 pci_release_regions(dev);
1261 pci_disable_device(dev);
1263 pci_set_drvdata(dev, NULL);
1267 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1268 { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1272 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1274 static struct pci_driver fpga_driver = {
1276 .id_table = fpga_pci_tbl,
1277 .probe = fpga_probe,
1278 .remove = fpga_remove,
1282 static int __init solos_pci_init(void)
1284 printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1285 return pci_register_driver(&fpga_driver);
1288 static void __exit solos_pci_exit(void)
1290 pci_unregister_driver(&fpga_driver);
1291 printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1294 module_init(solos_pci_init);
1295 module_exit(solos_pci_exit);