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
73 static int atmdebug = 0;
74 static int firmware_upgrade = 0;
75 static int fpga_upgrade = 0;
90 #define SKB_CB(skb) ((struct solos_skb_cb *)skb->cb)
99 void __iomem *config_regs;
100 void __iomem *buffers;
104 struct atm_dev *atmdev[4];
105 struct tasklet_struct tlet;
107 spinlock_t tx_queue_lock;
108 spinlock_t cli_queue_lock;
109 spinlock_t param_queue_lock;
110 struct list_head param_queue;
111 struct sk_buff_head tx_queue[4];
112 struct sk_buff_head cli_queue[4];
113 struct sk_buff *tx_skb[4];
114 struct sk_buff *rx_skb[4];
115 wait_queue_head_t param_wq;
116 wait_queue_head_t fw_wq;
122 struct list_head list;
125 struct sk_buff *response;
128 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
130 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
131 MODULE_DESCRIPTION("Solos PCI driver");
132 MODULE_VERSION(VERSION);
133 MODULE_LICENSE("GPL");
134 MODULE_PARM_DESC(atmdebug, "Print ATM data");
135 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
136 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
137 module_param(atmdebug, int, 0644);
138 module_param(firmware_upgrade, int, 0444);
139 module_param(fpga_upgrade, int, 0444);
141 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
142 struct atm_vcc *vcc);
143 static uint32_t fpga_tx(struct solos_card *);
144 static irqreturn_t solos_irq(int irq, void *dev_id);
145 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
146 static int list_vccs(int vci);
147 static void release_vccs(struct atm_dev *dev);
148 static int atm_init(struct solos_card *);
149 static void atm_remove(struct solos_card *);
150 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
151 static void solos_bh(unsigned long);
152 static int print_buffer(struct sk_buff *buf);
154 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
159 dev_kfree_skb_any(skb);
162 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
165 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
166 struct solos_card *card = atmdev->dev_data;
167 struct solos_param prm;
169 struct pkt_hdr *header;
172 buflen = strlen(attr->attr.name) + 10;
174 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
176 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
180 header = (void *)skb_put(skb, sizeof(*header));
182 buflen = snprintf((void *)&header[1], buflen - 1,
183 "L%05d\n%s\n", current->pid, attr->attr.name);
184 skb_put(skb, buflen);
186 header->size = cpu_to_le16(buflen);
187 header->vpi = cpu_to_le16(0);
188 header->vci = cpu_to_le16(0);
189 header->type = cpu_to_le16(PKT_COMMAND);
191 prm.pid = current->pid;
193 prm.port = SOLOS_CHAN(atmdev);
195 spin_lock_irq(&card->param_queue_lock);
196 list_add(&prm.list, &card->param_queue);
197 spin_unlock_irq(&card->param_queue_lock);
199 fpga_queue(card, prm.port, skb, NULL);
201 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
203 spin_lock_irq(&card->param_queue_lock);
205 spin_unlock_irq(&card->param_queue_lock);
210 buflen = prm.response->len;
211 memcpy(buf, prm.response->data, buflen);
212 kfree_skb(prm.response);
217 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
218 const char *buf, size_t count)
220 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
221 struct solos_card *card = atmdev->dev_data;
222 struct solos_param prm;
224 struct pkt_hdr *header;
228 buflen = strlen(attr->attr.name) + 11 + count;
230 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
232 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
236 header = (void *)skb_put(skb, sizeof(*header));
238 buflen = snprintf((void *)&header[1], buflen - 1,
239 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
241 skb_put(skb, buflen);
242 header->size = cpu_to_le16(buflen);
243 header->vpi = cpu_to_le16(0);
244 header->vci = cpu_to_le16(0);
245 header->type = cpu_to_le16(PKT_COMMAND);
247 prm.pid = current->pid;
249 prm.port = SOLOS_CHAN(atmdev);
251 spin_lock_irq(&card->param_queue_lock);
252 list_add(&prm.list, &card->param_queue);
253 spin_unlock_irq(&card->param_queue_lock);
255 fpga_queue(card, prm.port, skb, NULL);
257 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
259 spin_lock_irq(&card->param_queue_lock);
261 spin_unlock_irq(&card->param_queue_lock);
270 /* Sometimes it has a newline, sometimes it doesn't. */
271 if (skb->data[buflen - 1] == '\n')
274 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
276 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
279 /* We know we have enough space allocated for this; we allocated
281 skb->data[buflen] = 0;
283 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
292 static char *next_string(struct sk_buff *skb)
295 char *this = skb->data;
297 for (i = 0; i < skb->len; i++) {
298 if (this[i] == '\n') {
300 skb_pull(skb, i + 1);
303 if (!isprint(this[i]))
310 * Status packet has fields separated by \n, starting with a version number
311 * for the information therein. Fields are....
314 * TxBitRate (version >= 1)
315 * RxBitRate (version >= 1)
316 * State (version >= 1)
318 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
320 char *str, *end, *state_str;
321 int ver, rate_up, rate_down, state;
323 if (!card->atmdev[port])
326 str = next_string(skb);
330 ver = simple_strtol(str, NULL, 10);
332 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
337 str = next_string(skb);
340 rate_up = simple_strtol(str, &end, 10);
344 str = next_string(skb);
347 rate_down = simple_strtol(str, &end, 10);
351 state_str = next_string(skb);
354 if (!strcmp(state_str, "Showtime"))
355 state = ATM_PHY_SIG_FOUND;
357 state = ATM_PHY_SIG_LOST;
358 release_vccs(card->atmdev[port]);
361 if (state == ATM_PHY_SIG_LOST) {
362 dev_info(&card->dev->dev, "Port %d ATM state: %s\n",
367 snr = next_string(skb);
370 attn = next_string(skb);
374 dev_info(&card->dev->dev, "Port %d: %s (%d/%d kb/s%s%s%s%s)\n",
375 port, state_str, rate_down/1000, rate_up/1000,
376 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
378 card->atmdev[port]->link_rate = rate_down / 424;
379 card->atmdev[port]->signal = state;
384 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
386 struct solos_param *prm;
394 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
395 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
396 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
397 skb->data[6] != '\n')
400 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
402 spin_lock_irqsave(&card->param_queue_lock, flags);
403 list_for_each_entry(prm, &card->param_queue, list) {
404 if (prm->port == port && prm->pid == cmdpid) {
407 wake_up(&card->param_wq);
412 spin_unlock_irqrestore(&card->param_queue_lock, flags);
416 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
419 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
420 struct solos_card *card = atmdev->dev_data;
423 spin_lock(&card->cli_queue_lock);
424 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
425 spin_unlock(&card->cli_queue_lock);
427 return sprintf(buf, "No data.\n");
429 memcpy(buf, skb->data, skb->len);
430 dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
436 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
439 struct pkt_hdr *header;
441 if (size > (BUF_SIZE - sizeof(*header))) {
442 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
445 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
447 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
451 header = (void *)skb_put(skb, sizeof(*header));
453 header->size = cpu_to_le16(size);
454 header->vpi = cpu_to_le16(0);
455 header->vci = cpu_to_le16(0);
456 header->type = cpu_to_le16(PKT_COMMAND);
458 memcpy(skb_put(skb, size), buf, size);
460 fpga_queue(card, dev, skb, NULL);
465 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
466 const char *buf, size_t count)
468 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
469 struct solos_card *card = atmdev->dev_data;
472 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
477 static DEVICE_ATTR(console, 0644, console_show, console_store);
480 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
481 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
483 #include "solos-attrlist.c"
488 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
489 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
491 static struct attribute *solos_attrs[] = {
492 #include "solos-attrlist.c"
496 static struct attribute_group solos_attr_group = {
497 .attrs = solos_attrs,
498 .name = "parameters",
501 static int flash_upgrade(struct solos_card *card, int chip)
503 const struct firmware *fw;
511 fw_name = "solos-FPGA.bin";
512 blocksize = FPGA_BLOCK;
514 fw_name = "solos-Firmware.bin";
515 blocksize = SOLOS_BLOCK;
518 if (request_firmware(&fw, fw_name, &card->dev->dev))
521 dev_info(&card->dev->dev, "Flash upgrade starting\n");
523 numblocks = fw->size / blocksize;
524 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
525 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
527 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
528 iowrite32(1, card->config_regs + FPGA_MODE);
529 data32 = ioread32(card->config_regs + FPGA_MODE);
531 /* Set mode to Chip Erase */
532 dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
533 chip?"Solos":"FPGA");
534 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
537 iowrite32(1, card->config_regs + WRITE_FLASH);
538 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
540 for (offset = 0; offset < fw->size; offset += blocksize) {
543 /* Clear write flag */
544 iowrite32(0, card->config_regs + WRITE_FLASH);
546 /* Set mode to Block Write */
547 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
548 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
550 /* Copy block to buffer, swapping each 16 bits */
551 for(i = 0; i < blocksize; i += 4) {
552 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
553 iowrite32(word, RX_BUF(card, 3) + i);
556 /* Specify block number and then trigger flash write */
557 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
558 iowrite32(1, card->config_regs + WRITE_FLASH);
559 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
562 release_firmware(fw);
563 iowrite32(0, card->config_regs + WRITE_FLASH);
564 iowrite32(0, card->config_regs + FPGA_MODE);
565 iowrite32(0, card->config_regs + FLASH_MODE);
566 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
570 static irqreturn_t solos_irq(int irq, void *dev_id)
572 struct solos_card *card = dev_id;
575 iowrite32(0, card->config_regs + IRQ_CLEAR);
577 /* If we're up and running, just kick the tasklet to process TX/RX */
579 tasklet_schedule(&card->tlet);
581 wake_up(&card->fw_wq);
583 return IRQ_RETVAL(handled);
586 void solos_bh(unsigned long card_arg)
588 struct solos_card *card = (void *)card_arg;
590 uint32_t rx_done = 0;
594 * Since fpga_tx() is going to need to read the flags under its lock,
595 * it can return them to us so that we don't have to hit PCI MMIO
596 * again for the same information
598 card_flags = fpga_tx(card);
600 for (port = 0; port < card->nr_ports; port++) {
601 if (card_flags & (0x10 << port)) {
602 struct pkt_hdr _hdr, *header;
607 if (card->using_dma) {
608 skb = card->rx_skb[port];
609 card->rx_skb[port] = NULL;
611 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
612 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
614 header = (void *)skb->data;
615 size = le16_to_cpu(header->size);
616 skb_put(skb, size + sizeof(*header));
617 skb_pull(skb, sizeof(*header));
621 rx_done |= 0x10 << port;
623 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
625 size = le16_to_cpu(header->size);
627 skb = alloc_skb(size + 1, GFP_ATOMIC);
630 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
634 memcpy_fromio(skb_put(skb, size),
635 RX_BUF(card, port) + sizeof(*header),
639 dev_info(&card->dev->dev, "Received: device %d\n", port);
640 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
641 size, le16_to_cpu(header->vpi),
642 le16_to_cpu(header->vci));
646 switch (le16_to_cpu(header->type)) {
648 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
649 le16_to_cpu(header->vci));
652 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
653 le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
657 atm_charge(vcc, skb->truesize);
659 atomic_inc(&vcc->stats->rx);
663 process_status(card, port, skb);
664 dev_kfree_skb_any(skb);
668 default: /* FIXME: Not really, surely? */
669 if (process_command(card, port, skb))
671 spin_lock(&card->cli_queue_lock);
672 if (skb_queue_len(&card->cli_queue[port]) > 10) {
674 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
676 dev_kfree_skb_any(skb);
678 skb_queue_tail(&card->cli_queue[port], skb);
679 spin_unlock(&card->cli_queue_lock);
683 /* Allocate RX skbs for any ports which need them */
684 if (card->using_dma && card->atmdev[port] &&
685 !card->rx_skb[port]) {
686 struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
688 SKB_CB(skb)->dma_addr =
689 pci_map_single(card->dev, skb->data,
690 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
691 iowrite32(SKB_CB(skb)->dma_addr,
692 card->config_regs + RX_DMA_ADDR(port));
693 card->rx_skb[port] = skb;
696 dev_warn(&card->dev->dev, "Failed to allocate RX skb");
698 /* We'll have to try again later */
699 tasklet_schedule(&card->tlet);
704 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
709 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
711 struct hlist_head *head;
712 struct atm_vcc *vcc = NULL;
713 struct hlist_node *node;
716 read_lock(&vcc_sklist_lock);
717 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
718 sk_for_each(s, node, head) {
720 if (vcc->dev == dev && vcc->vci == vci &&
721 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
726 read_unlock(&vcc_sklist_lock);
730 static int list_vccs(int vci)
732 struct hlist_head *head;
734 struct hlist_node *node;
739 read_lock(&vcc_sklist_lock);
741 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
742 sk_for_each(s, node, head) {
745 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
751 for(i = 0; i < VCC_HTABLE_SIZE; i++){
753 sk_for_each(s, node, head) {
756 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
763 read_unlock(&vcc_sklist_lock);
767 static void release_vccs(struct atm_dev *dev)
771 write_lock_irq(&vcc_sklist_lock);
772 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
773 struct hlist_head *head = &vcc_hash[i];
774 struct hlist_node *node, *tmp;
778 sk_for_each_safe(s, node, tmp, head) {
780 if (vcc->dev == dev) {
781 vcc_release_async(vcc, -EPIPE);
786 write_unlock_irq(&vcc_sklist_lock);
790 static int popen(struct atm_vcc *vcc)
792 struct solos_card *card = vcc->dev->dev_data;
794 struct pkt_hdr *header;
796 if (vcc->qos.aal != ATM_AAL5) {
797 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
802 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
803 if (!skb && net_ratelimit()) {
804 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
807 header = (void *)skb_put(skb, sizeof(*header));
809 header->size = cpu_to_le16(0);
810 header->vpi = cpu_to_le16(vcc->vpi);
811 header->vci = cpu_to_le16(vcc->vci);
812 header->type = cpu_to_le16(PKT_POPEN);
814 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
816 // dev_dbg(&card->dev->dev, "Open for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
817 set_bit(ATM_VF_ADDR, &vcc->flags); // accept the vpi / vci
818 set_bit(ATM_VF_READY, &vcc->flags);
825 static void pclose(struct atm_vcc *vcc)
827 struct solos_card *card = vcc->dev->dev_data;
829 struct pkt_hdr *header;
831 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
833 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
836 header = (void *)skb_put(skb, sizeof(*header));
838 header->size = cpu_to_le16(0);
839 header->vpi = cpu_to_le16(vcc->vpi);
840 header->vci = cpu_to_le16(vcc->vci);
841 header->type = cpu_to_le16(PKT_PCLOSE);
843 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
845 // dev_dbg(&card->dev->dev, "Close for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
847 clear_bit(ATM_VF_ADDR, &vcc->flags);
848 clear_bit(ATM_VF_READY, &vcc->flags);
853 static int print_buffer(struct sk_buff *buf)
860 for (i = 0; i < len; i++){
862 sprintf(msg, "%02X: ", i);
864 sprintf(item,"%02X ",*(buf->data + i));
869 printk(KERN_DEBUG "%s", msg);
875 printk(KERN_DEBUG "%s", msg);
877 printk(KERN_DEBUG "\n");
882 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
888 SKB_CB(skb)->vcc = vcc;
890 spin_lock_irqsave(&card->tx_queue_lock, flags);
891 old_len = skb_queue_len(&card->tx_queue[port]);
892 skb_queue_tail(&card->tx_queue[port], skb);
894 card->tx_mask |= (1 << port);
895 spin_unlock_irqrestore(&card->tx_queue_lock, flags);
897 /* Theoretically we could just schedule the tasklet here, but
898 that introduces latency we don't want -- it's noticeable */
903 static uint32_t fpga_tx(struct solos_card *card)
905 uint32_t tx_pending, card_flags;
906 uint32_t tx_started = 0;
912 spin_lock_irqsave(&card->tx_lock, flags);
914 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
916 * The queue lock is required for _writing_ to tx_mask, but we're
917 * OK to read it here without locking. The only potential update
918 * that we could race with is in fpga_queue() where it sets a bit
919 * for a new port... but it's going to call this function again if
920 * it's doing that, anyway.
922 tx_pending = card->tx_mask & ~card_flags;
924 for (port = 0; tx_pending; tx_pending >>= 1, port++) {
925 if (tx_pending & 1) {
926 struct sk_buff *oldskb = card->tx_skb[port];
928 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
929 oldskb->len, PCI_DMA_TODEVICE);
931 spin_lock(&card->tx_queue_lock);
932 skb = skb_dequeue(&card->tx_queue[port]);
934 card->tx_mask &= ~(1 << port);
935 spin_unlock(&card->tx_queue_lock);
937 if (skb && !card->using_dma) {
938 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
939 tx_started |= 1 << port; //Set TX full flag
940 oldskb = skb; /* We're done with this skb already */
941 } else if (skb && card->using_dma) {
942 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
943 skb->len, PCI_DMA_TODEVICE);
944 iowrite32(SKB_CB(skb)->dma_addr,
945 card->config_regs + TX_DMA_ADDR(port));
951 /* Clean up and free oldskb now it's gone */
953 dev_info(&card->dev->dev, "Transmitted: port %d\n",
955 print_buffer(oldskb);
958 vcc = SKB_CB(oldskb)->vcc;
961 atomic_inc(&vcc->stats->tx);
962 solos_pop(vcc, oldskb);
964 dev_kfree_skb_irq(oldskb);
969 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
972 spin_unlock_irqrestore(&card->tx_lock, flags);
976 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
978 struct solos_card *card = vcc->dev->dev_data;
979 struct pkt_hdr *header;
982 //dev_dbg(&card->dev->dev, "psend called.\n");
983 //dev_dbg(&card->dev->dev, "dev,vpi,vci = %d,%d,%d\n",SOLOS_CHAN(vcc->dev),vcc->vpi,vcc->vci);
986 if (pktlen > (BUF_SIZE - sizeof(*header))) {
987 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
992 if (!skb_clone_writable(skb, sizeof(*header))) {
996 if (skb_headroom(skb) < sizeof(*header))
997 expand_by = sizeof(*header) - skb_headroom(skb);
999 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1001 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1002 solos_pop(vcc, skb);
1007 header = (void *)skb_push(skb, sizeof(*header));
1009 /* This does _not_ include the size of the header */
1010 header->size = cpu_to_le16(pktlen);
1011 header->vpi = cpu_to_le16(vcc->vpi);
1012 header->vci = cpu_to_le16(vcc->vci);
1013 header->type = cpu_to_le16(PKT_DATA);
1015 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1020 static struct atmdev_ops fpga_ops = {
1032 .owner = THIS_MODULE
1035 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1039 uint8_t major_ver, minor_ver;
1041 struct solos_card *card;
1043 card = kzalloc(sizeof(*card), GFP_KERNEL);
1048 init_waitqueue_head(&card->fw_wq);
1049 init_waitqueue_head(&card->param_wq);
1051 err = pci_enable_device(dev);
1053 dev_warn(&dev->dev, "Failed to enable PCI device\n");
1057 err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
1059 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1063 err = pci_request_regions(dev, "solos");
1065 dev_warn(&dev->dev, "Failed to request regions\n");
1069 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1070 if (!card->config_regs) {
1071 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1072 goto out_release_regions;
1074 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1075 if (!card->buffers) {
1076 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1077 goto out_unmap_config;
1080 // for(i=0;i<64 ;i+=4){
1081 // data32=ioread32(card->buffers + i);
1082 // dev_dbg(&card->dev->dev, "%08lX\n",(unsigned long)data32);
1085 //Fill Config Mem with zeros
1086 for(i = 0; i < 128; i += 4)
1087 iowrite32(0, card->config_regs + i);
1089 //Set RX empty flags
1090 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1092 data32 = ioread32(card->config_regs + FPGA_VER);
1093 fpga_ver = (data32 & 0x0000FFFF);
1094 major_ver = ((data32 & 0xFF000000) >> 24);
1095 minor_ver = ((data32 & 0x00FF0000) >> 16);
1096 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1097 major_ver, minor_ver, fpga_ver);
1100 card->using_dma = 1;
1102 card->nr_ports = 2; /* FIXME: Detect daughterboard */
1104 pci_set_drvdata(dev, card);
1106 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1107 spin_lock_init(&card->tx_lock);
1108 spin_lock_init(&card->tx_queue_lock);
1109 spin_lock_init(&card->cli_queue_lock);
1110 spin_lock_init(&card->param_queue_lock);
1111 INIT_LIST_HEAD(&card->param_queue);
1114 // Set Loopback mode
1115 data32 = 0x00010000;
1116 iowrite32(data32,card->config_regs + FLAGS_ADDR);
1119 // Fill Buffers with zeros
1120 for (i = 0; i < BUF_SIZE * 8; i += 4)
1121 iowrite32(0, card->buffers + i);
1124 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1125 iowrite32(0x12345678, card->buffers + i + (0*BUF_SIZE));
1126 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1127 iowrite32(0xabcdef98, card->buffers + i + (1*BUF_SIZE));
1129 // Read Config Memory
1130 printk(KERN_DEBUG "Reading Config MEM\n");
1132 for(i = 0; i < 16; i++) {
1133 data32=ioread32(card->buffers + i*(BUF_SIZE/2));
1134 printk(KERN_ALERT "Addr: %lX Data: %08lX\n",
1135 (unsigned long)(addr_start + i*(BUF_SIZE/2)),
1136 (unsigned long)data32);
1139 //dev_dbg(&card->dev->dev, "Requesting IRQ: %d\n",dev->irq);
1140 err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1143 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1144 goto out_unmap_both;
1148 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1151 flash_upgrade(card, 0);
1153 if (firmware_upgrade)
1154 flash_upgrade(card, 1);
1156 err = atm_init(card);
1163 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1164 free_irq(dev->irq, card);
1165 tasklet_kill(&card->tlet);
1168 pci_set_drvdata(dev, NULL);
1169 pci_iounmap(dev, card->config_regs);
1171 pci_iounmap(dev, card->buffers);
1172 out_release_regions:
1173 pci_release_regions(dev);
1178 static int atm_init(struct solos_card *card)
1182 for (i = 0; i < card->nr_ports; i++) {
1183 struct sk_buff *skb;
1184 struct pkt_hdr *header;
1186 skb_queue_head_init(&card->tx_queue[i]);
1187 skb_queue_head_init(&card->cli_queue[i]);
1189 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1190 if (!card->atmdev[i]) {
1191 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1195 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1196 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1197 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1198 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1200 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1202 card->atmdev[i]->ci_range.vpi_bits = 8;
1203 card->atmdev[i]->ci_range.vci_bits = 16;
1204 card->atmdev[i]->dev_data = card;
1205 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1206 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1208 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1210 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1214 header = (void *)skb_put(skb, sizeof(*header));
1216 header->size = cpu_to_le16(0);
1217 header->vpi = cpu_to_le16(0);
1218 header->vci = cpu_to_le16(0);
1219 header->type = cpu_to_le16(PKT_STATUS);
1221 fpga_queue(card, i, skb, NULL);
1226 static void atm_remove(struct solos_card *card)
1230 for (i = 0; i < card->nr_ports; i++) {
1231 if (card->atmdev[i]) {
1232 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1234 sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1235 atm_dev_deregister(card->atmdev[i]);
1240 static void fpga_remove(struct pci_dev *dev)
1242 struct solos_card *card = pci_get_drvdata(dev);
1246 dev_vdbg(&dev->dev, "Freeing IRQ\n");
1247 // Disable IRQs from FPGA
1248 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1249 free_irq(dev->irq, card);
1250 tasklet_kill(&card->tlet);
1252 // iowrite32(0x01,pciregs);
1253 dev_vdbg(&dev->dev, "Unmapping PCI resource\n");
1254 pci_iounmap(dev, card->buffers);
1255 pci_iounmap(dev, card->config_regs);
1257 dev_vdbg(&dev->dev, "Releasing PCI Region\n");
1258 pci_release_regions(dev);
1259 pci_disable_device(dev);
1261 pci_set_drvdata(dev, NULL);
1263 // dev_dbg(&card->dev->dev, "fpga_remove\n");
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);