xref: /linux/drivers/atm/solos-pci.c (revision 06d07429858317ded2db7986113a9e0129cd599b)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Driver for the Solos PCI ADSL2+ card, designed to support Linux by
4  *  Traverse Technologies -- https://www.traverse.com.au/
5  *  Xrio Limited          -- http://www.xrio.com/
6  *
7  * Copyright © 2008 Traverse Technologies
8  * Copyright © 2008 Intel Corporation
9  *
10  * Authors: Nathan Williams <nathan@traverse.com.au>
11  *          David Woodhouse <dwmw2@infradead.org>
12  *          Treker Chen <treker@xrio.com>
13  */
14 
15 #define DEBUG
16 #define VERBOSE_DEBUG
17 
18 #include <linux/interrupt.h>
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/ioport.h>
23 #include <linux/types.h>
24 #include <linux/pci.h>
25 #include <linux/atm.h>
26 #include <linux/atmdev.h>
27 #include <linux/skbuff.h>
28 #include <linux/sysfs.h>
29 #include <linux/device.h>
30 #include <linux/kobject.h>
31 #include <linux/firmware.h>
32 #include <linux/ctype.h>
33 #include <linux/swab.h>
34 #include <linux/slab.h>
35 
36 #define VERSION "1.04"
37 #define DRIVER_VERSION 0x01
38 #define PTAG "solos-pci"
39 
40 #define CONFIG_RAM_SIZE	128
41 #define FLAGS_ADDR	0x7C
42 #define IRQ_EN_ADDR	0x78
43 #define FPGA_VER	0x74
44 #define IRQ_CLEAR	0x70
45 #define WRITE_FLASH	0x6C
46 #define PORTS		0x68
47 #define FLASH_BLOCK	0x64
48 #define FLASH_BUSY	0x60
49 #define FPGA_MODE	0x5C
50 #define FLASH_MODE	0x58
51 #define GPIO_STATUS	0x54
52 #define DRIVER_VER	0x50
53 #define TX_DMA_ADDR(port)	(0x40 + (4 * (port)))
54 #define RX_DMA_ADDR(port)	(0x30 + (4 * (port)))
55 
56 #define DATA_RAM_SIZE	32768
57 #define BUF_SIZE	2048
58 #define OLD_BUF_SIZE	4096 /* For FPGA versions <= 2*/
59 /* Old boards use ATMEL AD45DB161D flash */
60 #define ATMEL_FPGA_PAGE	528 /* FPGA flash page size*/
61 #define ATMEL_SOLOS_PAGE	512 /* Solos flash page size*/
62 #define ATMEL_FPGA_BLOCK	(ATMEL_FPGA_PAGE * 8) /* FPGA block size*/
63 #define ATMEL_SOLOS_BLOCK	(ATMEL_SOLOS_PAGE * 8) /* Solos block size*/
64 /* Current boards use M25P/M25PE SPI flash */
65 #define SPI_FLASH_BLOCK	(256 * 64)
66 
67 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
68 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
69 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
70 
71 #define RX_DMA_SIZE	2048
72 
73 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
74 #define LEGACY_BUFFERS	2
75 #define DMA_SUPPORTED	4
76 
77 static int reset = 0;
78 static int atmdebug = 0;
79 static int firmware_upgrade = 0;
80 static int fpga_upgrade = 0;
81 static int db_firmware_upgrade = 0;
82 static int db_fpga_upgrade = 0;
83 
84 struct pkt_hdr {
85 	__le16 size;
86 	__le16 vpi;
87 	__le16 vci;
88 	__le16 type;
89 };
90 
91 struct solos_skb_cb {
92 	struct atm_vcc *vcc;
93 	uint32_t dma_addr;
94 };
95 
96 
97 #define SKB_CB(skb)		((struct solos_skb_cb *)skb->cb)
98 
99 #define PKT_DATA	0
100 #define PKT_COMMAND	1
101 #define PKT_POPEN	3
102 #define PKT_PCLOSE	4
103 #define PKT_STATUS	5
104 
105 struct solos_card {
106 	void __iomem *config_regs;
107 	void __iomem *buffers;
108 	int nr_ports;
109 	int tx_mask;
110 	struct pci_dev *dev;
111 	struct atm_dev *atmdev[4];
112 	struct tasklet_struct tlet;
113 	spinlock_t tx_lock;
114 	spinlock_t tx_queue_lock;
115 	spinlock_t cli_queue_lock;
116 	spinlock_t param_queue_lock;
117 	struct list_head param_queue;
118 	struct sk_buff_head tx_queue[4];
119 	struct sk_buff_head cli_queue[4];
120 	struct sk_buff *tx_skb[4];
121 	struct sk_buff *rx_skb[4];
122 	unsigned char *dma_bounce;
123 	wait_queue_head_t param_wq;
124 	wait_queue_head_t fw_wq;
125 	int using_dma;
126 	int dma_alignment;
127 	int fpga_version;
128 	int buffer_size;
129 	int atmel_flash;
130 };
131 
132 
133 struct solos_param {
134 	struct list_head list;
135 	pid_t pid;
136 	int port;
137 	struct sk_buff *response;
138 };
139 
140 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
141 
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);
161 
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 atm_init(struct solos_card *, struct device *);
168 static void atm_remove(struct solos_card *);
169 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
170 static void solos_bh(unsigned long);
171 static int print_buffer(struct sk_buff *buf);
172 
solos_pop(struct atm_vcc * vcc,struct sk_buff * skb)173 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
174 {
175         if (vcc->pop)
176                 vcc->pop(vcc, skb);
177         else
178                 dev_kfree_skb_any(skb);
179 }
180 
solos_param_show(struct device * dev,struct device_attribute * attr,char * buf)181 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
182 				char *buf)
183 {
184 	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
185 	struct solos_card *card = atmdev->dev_data;
186 	struct solos_param prm;
187 	struct sk_buff *skb;
188 	struct pkt_hdr *header;
189 	int buflen;
190 
191 	buflen = strlen(attr->attr.name) + 10;
192 
193 	skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
194 	if (!skb) {
195 		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
196 		return -ENOMEM;
197 	}
198 
199 	header = skb_put(skb, sizeof(*header));
200 
201 	buflen = snprintf((void *)&header[1], buflen - 1,
202 			  "L%05d\n%s\n", current->pid, attr->attr.name);
203 	skb_put(skb, buflen);
204 
205 	header->size = cpu_to_le16(buflen);
206 	header->vpi = cpu_to_le16(0);
207 	header->vci = cpu_to_le16(0);
208 	header->type = cpu_to_le16(PKT_COMMAND);
209 
210 	prm.pid = current->pid;
211 	prm.response = NULL;
212 	prm.port = SOLOS_CHAN(atmdev);
213 
214 	spin_lock_irq(&card->param_queue_lock);
215 	list_add(&prm.list, &card->param_queue);
216 	spin_unlock_irq(&card->param_queue_lock);
217 
218 	fpga_queue(card, prm.port, skb, NULL);
219 
220 	wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
221 
222 	spin_lock_irq(&card->param_queue_lock);
223 	list_del(&prm.list);
224 	spin_unlock_irq(&card->param_queue_lock);
225 
226 	if (!prm.response)
227 		return -EIO;
228 
229 	buflen = prm.response->len;
230 	memcpy(buf, prm.response->data, buflen);
231 	kfree_skb(prm.response);
232 
233 	return buflen;
234 }
235 
solos_param_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)236 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
237 				 const char *buf, size_t count)
238 {
239 	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
240 	struct solos_card *card = atmdev->dev_data;
241 	struct solos_param prm;
242 	struct sk_buff *skb;
243 	struct pkt_hdr *header;
244 	int buflen;
245 	ssize_t ret;
246 
247 	buflen = strlen(attr->attr.name) + 11 + count;
248 
249 	skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
250 	if (!skb) {
251 		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
252 		return -ENOMEM;
253 	}
254 
255 	header = skb_put(skb, sizeof(*header));
256 
257 	buflen = snprintf((void *)&header[1], buflen - 1,
258 			  "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
259 
260 	skb_put(skb, buflen);
261 	header->size = cpu_to_le16(buflen);
262 	header->vpi = cpu_to_le16(0);
263 	header->vci = cpu_to_le16(0);
264 	header->type = cpu_to_le16(PKT_COMMAND);
265 
266 	prm.pid = current->pid;
267 	prm.response = NULL;
268 	prm.port = SOLOS_CHAN(atmdev);
269 
270 	spin_lock_irq(&card->param_queue_lock);
271 	list_add(&prm.list, &card->param_queue);
272 	spin_unlock_irq(&card->param_queue_lock);
273 
274 	fpga_queue(card, prm.port, skb, NULL);
275 
276 	wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
277 
278 	spin_lock_irq(&card->param_queue_lock);
279 	list_del(&prm.list);
280 	spin_unlock_irq(&card->param_queue_lock);
281 
282 	skb = prm.response;
283 
284 	if (!skb)
285 		return -EIO;
286 
287 	buflen = skb->len;
288 
289 	/* Sometimes it has a newline, sometimes it doesn't. */
290 	if (skb->data[buflen - 1] == '\n')
291 		buflen--;
292 
293 	if (buflen == 2 && !strncmp(skb->data, "OK", 2))
294 		ret = count;
295 	else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
296 		ret = -EIO;
297 	else {
298 		/* We know we have enough space allocated for this; we allocated
299 		   it ourselves */
300 		skb->data[buflen] = 0;
301 
302 		dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
303 			 skb->data);
304 		ret = -EIO;
305 	}
306 	kfree_skb(skb);
307 
308 	return ret;
309 }
310 
next_string(struct sk_buff * skb)311 static char *next_string(struct sk_buff *skb)
312 {
313 	int i = 0;
314 	char *this = skb->data;
315 
316 	for (i = 0; i < skb->len; i++) {
317 		if (this[i] == '\n') {
318 			this[i] = 0;
319 			skb_pull(skb, i + 1);
320 			return this;
321 		}
322 		if (!isprint(this[i]))
323 			return NULL;
324 	}
325 	return NULL;
326 }
327 
328 /*
329  * Status packet has fields separated by \n, starting with a version number
330  * for the information therein. Fields are....
331  *
332  *     packet version
333  *     RxBitRate	(version >= 1)
334  *     TxBitRate	(version >= 1)
335  *     State		(version >= 1)
336  *     LocalSNRMargin	(version >= 1)
337  *     LocalLineAttn	(version >= 1)
338  */
process_status(struct solos_card * card,int port,struct sk_buff * skb)339 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
340 {
341 	char *str, *state_str, *snr, *attn;
342 	int ver, rate_up, rate_down, err;
343 
344 	if (!card->atmdev[port])
345 		return -ENODEV;
346 
347 	str = next_string(skb);
348 	if (!str)
349 		return -EIO;
350 
351 	err = kstrtoint(str, 10, &ver);
352 	if (err) {
353 		dev_warn(&card->dev->dev, "Unexpected status interrupt version\n");
354 		return err;
355 	}
356 	if (ver < 1) {
357 		dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
358 			 ver);
359 		return -EIO;
360 	}
361 
362 	str = next_string(skb);
363 	if (!str)
364 		return -EIO;
365 	if (!strcmp(str, "ERROR")) {
366 		dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
367 			 port);
368 		return 0;
369 	}
370 
371 	err = kstrtoint(str, 10, &rate_down);
372 	if (err)
373 		return err;
374 
375 	str = next_string(skb);
376 	if (!str)
377 		return -EIO;
378 	err = kstrtoint(str, 10, &rate_up);
379 	if (err)
380 		return err;
381 
382 	state_str = next_string(skb);
383 	if (!state_str)
384 		return -EIO;
385 
386 	/* Anything but 'Showtime' is down */
387 	if (strcmp(state_str, "Showtime")) {
388 		atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_LOST);
389 		dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
390 		return 0;
391 	}
392 
393 	snr = next_string(skb);
394 	if (!snr)
395 		return -EIO;
396 	attn = next_string(skb);
397 	if (!attn)
398 		return -EIO;
399 
400 	dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
401 		 port, state_str, rate_down/1000, rate_up/1000,
402 		 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
403 
404 	card->atmdev[port]->link_rate = rate_down / 424;
405 	atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_FOUND);
406 
407 	return 0;
408 }
409 
process_command(struct solos_card * card,int port,struct sk_buff * skb)410 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
411 {
412 	struct solos_param *prm;
413 	unsigned long flags;
414 	int cmdpid;
415 	int found = 0, err;
416 
417 	if (skb->len < 7)
418 		return 0;
419 
420 	if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
421 	    !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
422 	    !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
423 	    skb->data[6] != '\n')
424 		return 0;
425 
426 	err = kstrtoint(&skb->data[1], 10, &cmdpid);
427 	if (err)
428 		return err;
429 
430 	spin_lock_irqsave(&card->param_queue_lock, flags);
431 	list_for_each_entry(prm, &card->param_queue, list) {
432 		if (prm->port == port && prm->pid == cmdpid) {
433 			prm->response = skb;
434 			skb_pull(skb, 7);
435 			wake_up(&card->param_wq);
436 			found = 1;
437 			break;
438 		}
439 	}
440 	spin_unlock_irqrestore(&card->param_queue_lock, flags);
441 	return found;
442 }
443 
console_show(struct device * dev,struct device_attribute * attr,char * buf)444 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
445 			    char *buf)
446 {
447 	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
448 	struct solos_card *card = atmdev->dev_data;
449 	struct sk_buff *skb;
450 	unsigned int len;
451 
452 	spin_lock_bh(&card->cli_queue_lock);
453 	skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
454 	spin_unlock_bh(&card->cli_queue_lock);
455 	if(skb == NULL)
456 		return sprintf(buf, "No data.\n");
457 
458 	len = skb->len;
459 	memcpy(buf, skb->data, len);
460 
461 	kfree_skb(skb);
462 	return len;
463 }
464 
send_command(struct solos_card * card,int dev,const char * buf,size_t size)465 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
466 {
467 	struct sk_buff *skb;
468 	struct pkt_hdr *header;
469 
470 	if (size > (BUF_SIZE - sizeof(*header))) {
471 		dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
472 		return 0;
473 	}
474 	skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
475 	if (!skb) {
476 		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
477 		return 0;
478 	}
479 
480 	header = skb_put(skb, sizeof(*header));
481 
482 	header->size = cpu_to_le16(size);
483 	header->vpi = cpu_to_le16(0);
484 	header->vci = cpu_to_le16(0);
485 	header->type = cpu_to_le16(PKT_COMMAND);
486 
487 	skb_put_data(skb, buf, size);
488 
489 	fpga_queue(card, dev, skb, NULL);
490 
491 	return 0;
492 }
493 
console_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)494 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
495 			     const char *buf, size_t count)
496 {
497 	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
498 	struct solos_card *card = atmdev->dev_data;
499 	int err;
500 
501 	err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
502 
503 	return err?:count;
504 }
505 
506 struct geos_gpio_attr {
507 	struct device_attribute attr;
508 	int offset;
509 };
510 
511 #define SOLOS_GPIO_ATTR(_name, _mode, _show, _store, _offset)	\
512 	struct geos_gpio_attr gpio_attr_##_name = {		\
513 		.attr = __ATTR(_name, _mode, _show, _store),	\
514 		.offset = _offset }
515 
geos_gpio_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)516 static ssize_t geos_gpio_store(struct device *dev, struct device_attribute *attr,
517 			       const char *buf, size_t count)
518 {
519 	struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
520 	struct solos_card *card = dev_get_drvdata(dev);
521 	uint32_t data32;
522 
523 	if (count != 1 && (count != 2 || buf[1] != '\n'))
524 		return -EINVAL;
525 
526 	spin_lock_irq(&card->param_queue_lock);
527 	data32 = ioread32(card->config_regs + GPIO_STATUS);
528 	if (buf[0] == '1') {
529 		data32 |= 1 << gattr->offset;
530 		iowrite32(data32, card->config_regs + GPIO_STATUS);
531 	} else if (buf[0] == '0') {
532 		data32 &= ~(1 << gattr->offset);
533 		iowrite32(data32, card->config_regs + GPIO_STATUS);
534 	} else {
535 		count = -EINVAL;
536 	}
537 	spin_unlock_irq(&card->param_queue_lock);
538 	return count;
539 }
540 
geos_gpio_show(struct device * dev,struct device_attribute * attr,char * buf)541 static ssize_t geos_gpio_show(struct device *dev, struct device_attribute *attr,
542 			      char *buf)
543 {
544 	struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
545 	struct solos_card *card = dev_get_drvdata(dev);
546 	uint32_t data32;
547 
548 	data32 = ioread32(card->config_regs + GPIO_STATUS);
549 	data32 = (data32 >> gattr->offset) & 1;
550 
551 	return sprintf(buf, "%d\n", data32);
552 }
553 
hardware_show(struct device * dev,struct device_attribute * attr,char * buf)554 static ssize_t hardware_show(struct device *dev, struct device_attribute *attr,
555 			     char *buf)
556 {
557 	struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
558 	struct solos_card *card = dev_get_drvdata(dev);
559 	uint32_t data32;
560 
561 	data32 = ioread32(card->config_regs + GPIO_STATUS);
562 	switch (gattr->offset) {
563 	case 0:
564 		/* HardwareVersion */
565 		data32 = data32 & 0x1F;
566 		break;
567 	case 1:
568 		/* HardwareVariant */
569 		data32 = (data32 >> 5) & 0x0F;
570 		break;
571 	}
572 	return sprintf(buf, "%d\n", data32);
573 }
574 
575 static DEVICE_ATTR_RW(console);
576 
577 
578 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
579 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
580 
581 #include "solos-attrlist.c"
582 
583 static SOLOS_GPIO_ATTR(GPIO1, 0644, geos_gpio_show, geos_gpio_store, 9);
584 static SOLOS_GPIO_ATTR(GPIO2, 0644, geos_gpio_show, geos_gpio_store, 10);
585 static SOLOS_GPIO_ATTR(GPIO3, 0644, geos_gpio_show, geos_gpio_store, 11);
586 static SOLOS_GPIO_ATTR(GPIO4, 0644, geos_gpio_show, geos_gpio_store, 12);
587 static SOLOS_GPIO_ATTR(GPIO5, 0644, geos_gpio_show, geos_gpio_store, 13);
588 static SOLOS_GPIO_ATTR(PushButton, 0444, geos_gpio_show, NULL, 14);
589 static SOLOS_GPIO_ATTR(HardwareVersion, 0444, hardware_show, NULL, 0);
590 static SOLOS_GPIO_ATTR(HardwareVariant, 0444, hardware_show, NULL, 1);
591 #undef SOLOS_ATTR_RO
592 #undef SOLOS_ATTR_RW
593 
594 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
595 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
596 
597 static struct attribute *solos_attrs[] = {
598 #include "solos-attrlist.c"
599 	NULL
600 };
601 
602 static const struct attribute_group solos_attr_group = {
603 	.attrs = solos_attrs,
604 	.name = "parameters",
605 };
606 
607 static struct attribute *gpio_attrs[] = {
608 	&gpio_attr_GPIO1.attr.attr,
609 	&gpio_attr_GPIO2.attr.attr,
610 	&gpio_attr_GPIO3.attr.attr,
611 	&gpio_attr_GPIO4.attr.attr,
612 	&gpio_attr_GPIO5.attr.attr,
613 	&gpio_attr_PushButton.attr.attr,
614 	&gpio_attr_HardwareVersion.attr.attr,
615 	&gpio_attr_HardwareVariant.attr.attr,
616 	NULL
617 };
618 
619 static const struct attribute_group gpio_attr_group = {
620 	.attrs = gpio_attrs,
621 	.name = "gpio",
622 };
623 
flash_upgrade(struct solos_card * card,int chip)624 static int flash_upgrade(struct solos_card *card, int chip)
625 {
626 	const struct firmware *fw;
627 	const char *fw_name;
628 	int blocksize = 0;
629 	int numblocks = 0;
630 	int offset;
631 
632 	switch (chip) {
633 	case 0:
634 		fw_name = "solos-FPGA.bin";
635 		if (card->atmel_flash)
636 			blocksize = ATMEL_FPGA_BLOCK;
637 		else
638 			blocksize = SPI_FLASH_BLOCK;
639 		break;
640 	case 1:
641 		fw_name = "solos-Firmware.bin";
642 		if (card->atmel_flash)
643 			blocksize = ATMEL_SOLOS_BLOCK;
644 		else
645 			blocksize = SPI_FLASH_BLOCK;
646 		break;
647 	case 2:
648 		if (card->fpga_version > LEGACY_BUFFERS){
649 			fw_name = "solos-db-FPGA.bin";
650 			if (card->atmel_flash)
651 				blocksize = ATMEL_FPGA_BLOCK;
652 			else
653 				blocksize = SPI_FLASH_BLOCK;
654 		} else {
655 			dev_info(&card->dev->dev, "FPGA version doesn't support"
656 					" daughter board upgrades\n");
657 			return -EPERM;
658 		}
659 		break;
660 	case 3:
661 		if (card->fpga_version > LEGACY_BUFFERS){
662 			fw_name = "solos-Firmware.bin";
663 			if (card->atmel_flash)
664 				blocksize = ATMEL_SOLOS_BLOCK;
665 			else
666 				blocksize = SPI_FLASH_BLOCK;
667 		} else {
668 			dev_info(&card->dev->dev, "FPGA version doesn't support"
669 					" daughter board upgrades\n");
670 			return -EPERM;
671 		}
672 		break;
673 	default:
674 		return -ENODEV;
675 	}
676 
677 	if (request_firmware(&fw, fw_name, &card->dev->dev))
678 		return -ENOENT;
679 
680 	dev_info(&card->dev->dev, "Flash upgrade starting\n");
681 
682 	/* New FPGAs require driver version before permitting flash upgrades */
683 	iowrite32(DRIVER_VERSION, card->config_regs + DRIVER_VER);
684 
685 	numblocks = fw->size / blocksize;
686 	dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
687 	dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
688 
689 	dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
690 	iowrite32(1, card->config_regs + FPGA_MODE);
691 	(void) ioread32(card->config_regs + FPGA_MODE);
692 
693 	/* Set mode to Chip Erase */
694 	if(chip == 0 || chip == 2)
695 		dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
696 	if(chip == 1 || chip == 3)
697 		dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
698 	iowrite32((chip * 2), card->config_regs + FLASH_MODE);
699 
700 
701 	iowrite32(1, card->config_regs + WRITE_FLASH);
702 	wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
703 
704 	for (offset = 0; offset < fw->size; offset += blocksize) {
705 		int i;
706 
707 		/* Clear write flag */
708 		iowrite32(0, card->config_regs + WRITE_FLASH);
709 
710 		/* Set mode to Block Write */
711 		/* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
712 		iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
713 
714 		/* Copy block to buffer, swapping each 16 bits for Atmel flash */
715 		for(i = 0; i < blocksize; i += 4) {
716 			uint32_t word;
717 			if (card->atmel_flash)
718 				word = swahb32p((uint32_t *)(fw->data + offset + i));
719 			else
720 				word = *(uint32_t *)(fw->data + offset + i);
721 			if(card->fpga_version > LEGACY_BUFFERS)
722 				iowrite32(word, FLASH_BUF + i);
723 			else
724 				iowrite32(word, RX_BUF(card, 3) + i);
725 		}
726 
727 		/* Specify block number and then trigger flash write */
728 		iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
729 		iowrite32(1, card->config_regs + WRITE_FLASH);
730 		wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
731 	}
732 
733 	release_firmware(fw);
734 	iowrite32(0, card->config_regs + WRITE_FLASH);
735 	iowrite32(0, card->config_regs + FPGA_MODE);
736 	iowrite32(0, card->config_regs + FLASH_MODE);
737 	dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
738 	return 0;
739 }
740 
solos_irq(int irq,void * dev_id)741 static irqreturn_t solos_irq(int irq, void *dev_id)
742 {
743 	struct solos_card *card = dev_id;
744 	int handled = 1;
745 
746 	iowrite32(0, card->config_regs + IRQ_CLEAR);
747 
748 	/* If we're up and running, just kick the tasklet to process TX/RX */
749 	if (card->atmdev[0])
750 		tasklet_schedule(&card->tlet);
751 	else
752 		wake_up(&card->fw_wq);
753 
754 	return IRQ_RETVAL(handled);
755 }
756 
solos_bh(unsigned long card_arg)757 static void solos_bh(unsigned long card_arg)
758 {
759 	struct solos_card *card = (void *)card_arg;
760 	uint32_t card_flags;
761 	uint32_t rx_done = 0;
762 	int port;
763 
764 	/*
765 	 * Since fpga_tx() is going to need to read the flags under its lock,
766 	 * it can return them to us so that we don't have to hit PCI MMIO
767 	 * again for the same information
768 	 */
769 	card_flags = fpga_tx(card);
770 
771 	for (port = 0; port < card->nr_ports; port++) {
772 		if (card_flags & (0x10 << port)) {
773 			struct pkt_hdr _hdr, *header;
774 			struct sk_buff *skb;
775 			struct atm_vcc *vcc;
776 			int size;
777 
778 			if (card->using_dma) {
779 				skb = card->rx_skb[port];
780 				card->rx_skb[port] = NULL;
781 
782 				dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
783 						 RX_DMA_SIZE, DMA_FROM_DEVICE);
784 
785 				header = (void *)skb->data;
786 				size = le16_to_cpu(header->size);
787 				skb_put(skb, size + sizeof(*header));
788 				skb_pull(skb, sizeof(*header));
789 			} else {
790 				header = &_hdr;
791 
792 				rx_done |= 0x10 << port;
793 
794 				memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
795 
796 				size = le16_to_cpu(header->size);
797 				if (size > (card->buffer_size - sizeof(*header))){
798 					dev_warn(&card->dev->dev, "Invalid buffer size\n");
799 					continue;
800 				}
801 
802 				/* Use netdev_alloc_skb() because it adds NET_SKB_PAD of
803 				 * headroom, and ensures we can route packets back out an
804 				 * Ethernet interface (for example) without having to
805 				 * reallocate. Adding NET_IP_ALIGN also ensures that both
806 				 * PPPoATM and PPPoEoBR2684 packets end up aligned. */
807 				skb = netdev_alloc_skb_ip_align(NULL, size + 1);
808 				if (!skb) {
809 					if (net_ratelimit())
810 						dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
811 					continue;
812 				}
813 
814 				memcpy_fromio(skb_put(skb, size),
815 					      RX_BUF(card, port) + sizeof(*header),
816 					      size);
817 			}
818 			if (atmdebug) {
819 				dev_info(&card->dev->dev, "Received: port %d\n", port);
820 				dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
821 					 size, le16_to_cpu(header->vpi),
822 					 le16_to_cpu(header->vci));
823 				print_buffer(skb);
824 			}
825 
826 			switch (le16_to_cpu(header->type)) {
827 			case PKT_DATA:
828 				vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
829 					       le16_to_cpu(header->vci));
830 				if (!vcc) {
831 					if (net_ratelimit())
832 						dev_warn(&card->dev->dev, "Received packet for unknown VPI.VCI %d.%d on port %d\n",
833 							 le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
834 							 port);
835 					dev_kfree_skb_any(skb);
836 					break;
837 				}
838 				atm_charge(vcc, skb->truesize);
839 				vcc->push(vcc, skb);
840 				atomic_inc(&vcc->stats->rx);
841 				break;
842 
843 			case PKT_STATUS:
844 				if (process_status(card, port, skb) &&
845 				    net_ratelimit()) {
846 					dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
847 					print_buffer(skb);
848 				}
849 				dev_kfree_skb_any(skb);
850 				break;
851 
852 			case PKT_COMMAND:
853 			default: /* FIXME: Not really, surely? */
854 				if (process_command(card, port, skb))
855 					break;
856 				spin_lock(&card->cli_queue_lock);
857 				if (skb_queue_len(&card->cli_queue[port]) > 10) {
858 					if (net_ratelimit())
859 						dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
860 							 port);
861 					dev_kfree_skb_any(skb);
862 				} else
863 					skb_queue_tail(&card->cli_queue[port], skb);
864 				spin_unlock(&card->cli_queue_lock);
865 				break;
866 			}
867 		}
868 		/* Allocate RX skbs for any ports which need them */
869 		if (card->using_dma && card->atmdev[port] &&
870 		    !card->rx_skb[port]) {
871 			/* Unlike the MMIO case (qv) we can't add NET_IP_ALIGN
872 			 * here; the FPGA can only DMA to addresses which are
873 			 * aligned to 4 bytes. */
874 			struct sk_buff *skb = dev_alloc_skb(RX_DMA_SIZE);
875 			if (skb) {
876 				SKB_CB(skb)->dma_addr =
877 					dma_map_single(&card->dev->dev, skb->data,
878 						       RX_DMA_SIZE, DMA_FROM_DEVICE);
879 				iowrite32(SKB_CB(skb)->dma_addr,
880 					  card->config_regs + RX_DMA_ADDR(port));
881 				card->rx_skb[port] = skb;
882 			} else {
883 				if (net_ratelimit())
884 					dev_warn(&card->dev->dev, "Failed to allocate RX skb");
885 
886 				/* We'll have to try again later */
887 				tasklet_schedule(&card->tlet);
888 			}
889 		}
890 	}
891 	if (rx_done)
892 		iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
893 
894 	return;
895 }
896 
find_vcc(struct atm_dev * dev,short vpi,int vci)897 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
898 {
899 	struct hlist_head *head;
900 	struct atm_vcc *vcc = NULL;
901 	struct sock *s;
902 
903 	read_lock(&vcc_sklist_lock);
904 	head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
905 	sk_for_each(s, head) {
906 		vcc = atm_sk(s);
907 		if (vcc->dev == dev && vcc->vci == vci &&
908 		    vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE &&
909 		    test_bit(ATM_VF_READY, &vcc->flags))
910 			goto out;
911 	}
912 	vcc = NULL;
913  out:
914 	read_unlock(&vcc_sklist_lock);
915 	return vcc;
916 }
917 
popen(struct atm_vcc * vcc)918 static int popen(struct atm_vcc *vcc)
919 {
920 	struct solos_card *card = vcc->dev->dev_data;
921 	struct sk_buff *skb;
922 	struct pkt_hdr *header;
923 
924 	if (vcc->qos.aal != ATM_AAL5) {
925 		dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
926 			 vcc->qos.aal);
927 		return -EINVAL;
928 	}
929 
930 	skb = alloc_skb(sizeof(*header), GFP_KERNEL);
931 	if (!skb) {
932 		if (net_ratelimit())
933 			dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
934 		return -ENOMEM;
935 	}
936 	header = skb_put(skb, sizeof(*header));
937 
938 	header->size = cpu_to_le16(0);
939 	header->vpi = cpu_to_le16(vcc->vpi);
940 	header->vci = cpu_to_le16(vcc->vci);
941 	header->type = cpu_to_le16(PKT_POPEN);
942 
943 	fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
944 
945 	set_bit(ATM_VF_ADDR, &vcc->flags);
946 	set_bit(ATM_VF_READY, &vcc->flags);
947 
948 	return 0;
949 }
950 
pclose(struct atm_vcc * vcc)951 static void pclose(struct atm_vcc *vcc)
952 {
953 	struct solos_card *card = vcc->dev->dev_data;
954 	unsigned char port = SOLOS_CHAN(vcc->dev);
955 	struct sk_buff *skb, *tmpskb;
956 	struct pkt_hdr *header;
957 
958 	/* Remove any yet-to-be-transmitted packets from the pending queue */
959 	spin_lock_bh(&card->tx_queue_lock);
960 	skb_queue_walk_safe(&card->tx_queue[port], skb, tmpskb) {
961 		if (SKB_CB(skb)->vcc == vcc) {
962 			skb_unlink(skb, &card->tx_queue[port]);
963 			solos_pop(vcc, skb);
964 		}
965 	}
966 	spin_unlock_bh(&card->tx_queue_lock);
967 
968 	skb = alloc_skb(sizeof(*header), GFP_KERNEL);
969 	if (!skb) {
970 		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
971 		return;
972 	}
973 	header = skb_put(skb, sizeof(*header));
974 
975 	header->size = cpu_to_le16(0);
976 	header->vpi = cpu_to_le16(vcc->vpi);
977 	header->vci = cpu_to_le16(vcc->vci);
978 	header->type = cpu_to_le16(PKT_PCLOSE);
979 
980 	skb_get(skb);
981 	fpga_queue(card, port, skb, NULL);
982 
983 	if (!wait_event_timeout(card->param_wq, !skb_shared(skb), 5 * HZ))
984 		dev_warn(&card->dev->dev,
985 			 "Timeout waiting for VCC close on port %d\n", port);
986 
987 	dev_kfree_skb(skb);
988 
989 	/* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
990 	   tasklet has finished processing any incoming packets (and, more to
991 	   the point, using the vcc pointer). */
992 	tasklet_unlock_wait(&card->tlet);
993 
994 	clear_bit(ATM_VF_ADDR, &vcc->flags);
995 
996 	return;
997 }
998 
print_buffer(struct sk_buff * buf)999 static int print_buffer(struct sk_buff *buf)
1000 {
1001 	int len,i;
1002 	char msg[500];
1003 	char item[10];
1004 
1005 	len = buf->len;
1006 	for (i = 0; i < len; i++){
1007 		if(i % 8 == 0)
1008 			sprintf(msg, "%02X: ", i);
1009 
1010 		sprintf(item,"%02X ",*(buf->data + i));
1011 		strcat(msg, item);
1012 		if(i % 8 == 7) {
1013 			sprintf(item, "\n");
1014 			strcat(msg, item);
1015 			printk(KERN_DEBUG "%s", msg);
1016 		}
1017 	}
1018 	if (i % 8 != 0) {
1019 		sprintf(item, "\n");
1020 		strcat(msg, item);
1021 		printk(KERN_DEBUG "%s", msg);
1022 	}
1023 	printk(KERN_DEBUG "\n");
1024 
1025 	return 0;
1026 }
1027 
fpga_queue(struct solos_card * card,int port,struct sk_buff * skb,struct atm_vcc * vcc)1028 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
1029 		       struct atm_vcc *vcc)
1030 {
1031 	int old_len;
1032 	unsigned long flags;
1033 
1034 	SKB_CB(skb)->vcc = vcc;
1035 
1036 	spin_lock_irqsave(&card->tx_queue_lock, flags);
1037 	old_len = skb_queue_len(&card->tx_queue[port]);
1038 	skb_queue_tail(&card->tx_queue[port], skb);
1039 	if (!old_len)
1040 		card->tx_mask |= (1 << port);
1041 	spin_unlock_irqrestore(&card->tx_queue_lock, flags);
1042 
1043 	/* Theoretically we could just schedule the tasklet here, but
1044 	   that introduces latency we don't want -- it's noticeable */
1045 	if (!old_len)
1046 		fpga_tx(card);
1047 }
1048 
fpga_tx(struct solos_card * card)1049 static uint32_t fpga_tx(struct solos_card *card)
1050 {
1051 	uint32_t tx_pending, card_flags;
1052 	uint32_t tx_started = 0;
1053 	struct sk_buff *skb;
1054 	struct atm_vcc *vcc;
1055 	unsigned char port;
1056 	unsigned long flags;
1057 
1058 	spin_lock_irqsave(&card->tx_lock, flags);
1059 
1060 	card_flags = ioread32(card->config_regs + FLAGS_ADDR);
1061 	/*
1062 	 * The queue lock is required for _writing_ to tx_mask, but we're
1063 	 * OK to read it here without locking. The only potential update
1064 	 * that we could race with is in fpga_queue() where it sets a bit
1065 	 * for a new port... but it's going to call this function again if
1066 	 * it's doing that, anyway.
1067 	 */
1068 	tx_pending = card->tx_mask & ~card_flags;
1069 
1070 	for (port = 0; tx_pending; tx_pending >>= 1, port++) {
1071 		if (tx_pending & 1) {
1072 			struct sk_buff *oldskb = card->tx_skb[port];
1073 			if (oldskb) {
1074 				dma_unmap_single(&card->dev->dev, SKB_CB(oldskb)->dma_addr,
1075 						 oldskb->len, DMA_TO_DEVICE);
1076 				card->tx_skb[port] = NULL;
1077 			}
1078 			spin_lock(&card->tx_queue_lock);
1079 			skb = skb_dequeue(&card->tx_queue[port]);
1080 			if (!skb)
1081 				card->tx_mask &= ~(1 << port);
1082 			spin_unlock(&card->tx_queue_lock);
1083 
1084 			if (skb && !card->using_dma) {
1085 				memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
1086 				tx_started |= 1 << port;
1087 				oldskb = skb; /* We're done with this skb already */
1088 			} else if (skb && card->using_dma) {
1089 				unsigned char *data = skb->data;
1090 				if ((unsigned long)data & card->dma_alignment) {
1091 					data = card->dma_bounce + (BUF_SIZE * port);
1092 					memcpy(data, skb->data, skb->len);
1093 				}
1094 				SKB_CB(skb)->dma_addr = dma_map_single(&card->dev->dev, data,
1095 								       skb->len, DMA_TO_DEVICE);
1096 				card->tx_skb[port] = skb;
1097 				iowrite32(SKB_CB(skb)->dma_addr,
1098 					  card->config_regs + TX_DMA_ADDR(port));
1099 			}
1100 
1101 			if (!oldskb)
1102 				continue;
1103 
1104 			/* Clean up and free oldskb now it's gone */
1105 			if (atmdebug) {
1106 				struct pkt_hdr *header = (void *)oldskb->data;
1107 				int size = le16_to_cpu(header->size);
1108 
1109 				skb_pull(oldskb, sizeof(*header));
1110 				dev_info(&card->dev->dev, "Transmitted: port %d\n",
1111 					 port);
1112 				dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
1113 					 size, le16_to_cpu(header->vpi),
1114 					 le16_to_cpu(header->vci));
1115 				print_buffer(oldskb);
1116 			}
1117 
1118 			vcc = SKB_CB(oldskb)->vcc;
1119 
1120 			if (vcc) {
1121 				atomic_inc(&vcc->stats->tx);
1122 				solos_pop(vcc, oldskb);
1123 			} else {
1124 				dev_kfree_skb_irq(oldskb);
1125 				wake_up(&card->param_wq);
1126 			}
1127 		}
1128 	}
1129 	/* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1130 	if (tx_started)
1131 		iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1132 
1133 	spin_unlock_irqrestore(&card->tx_lock, flags);
1134 	return card_flags;
1135 }
1136 
psend(struct atm_vcc * vcc,struct sk_buff * skb)1137 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1138 {
1139 	struct solos_card *card = vcc->dev->dev_data;
1140 	struct pkt_hdr *header;
1141 	int pktlen;
1142 
1143 	pktlen = skb->len;
1144 	if (pktlen > (BUF_SIZE - sizeof(*header))) {
1145 		dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1146 		solos_pop(vcc, skb);
1147 		return 0;
1148 	}
1149 
1150 	if (!skb_clone_writable(skb, sizeof(*header))) {
1151 		int expand_by = 0;
1152 		int ret;
1153 
1154 		if (skb_headroom(skb) < sizeof(*header))
1155 			expand_by = sizeof(*header) - skb_headroom(skb);
1156 
1157 		ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1158 		if (ret) {
1159 			dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1160 			solos_pop(vcc, skb);
1161 			return ret;
1162 		}
1163 	}
1164 
1165 	header = skb_push(skb, sizeof(*header));
1166 
1167 	/* This does _not_ include the size of the header */
1168 	header->size = cpu_to_le16(pktlen);
1169 	header->vpi = cpu_to_le16(vcc->vpi);
1170 	header->vci = cpu_to_le16(vcc->vci);
1171 	header->type = cpu_to_le16(PKT_DATA);
1172 
1173 	fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1174 
1175 	return 0;
1176 }
1177 
1178 static const struct atmdev_ops fpga_ops = {
1179 	.open =		popen,
1180 	.close =	pclose,
1181 	.ioctl =	NULL,
1182 	.send =		psend,
1183 	.send_oam =	NULL,
1184 	.phy_put =	NULL,
1185 	.phy_get =	NULL,
1186 	.change_qos =	NULL,
1187 	.proc_read =	NULL,
1188 	.owner =	THIS_MODULE
1189 };
1190 
fpga_probe(struct pci_dev * dev,const struct pci_device_id * id)1191 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1192 {
1193 	int err;
1194 	uint16_t fpga_ver;
1195 	uint8_t major_ver, minor_ver;
1196 	uint32_t data32;
1197 	struct solos_card *card;
1198 
1199 	card = kzalloc(sizeof(*card), GFP_KERNEL);
1200 	if (!card)
1201 		return -ENOMEM;
1202 
1203 	card->dev = dev;
1204 	init_waitqueue_head(&card->fw_wq);
1205 	init_waitqueue_head(&card->param_wq);
1206 
1207 	err = pci_enable_device(dev);
1208 	if (err) {
1209 		dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1210 		goto out;
1211 	}
1212 
1213 	err = dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
1214 	if (err) {
1215 		dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1216 		goto out;
1217 	}
1218 
1219 	err = pci_request_regions(dev, "solos");
1220 	if (err) {
1221 		dev_warn(&dev->dev, "Failed to request regions\n");
1222 		goto out;
1223 	}
1224 
1225 	card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1226 	if (!card->config_regs) {
1227 		dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1228 		err = -ENOMEM;
1229 		goto out_release_regions;
1230 	}
1231 	card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1232 	if (!card->buffers) {
1233 		dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1234 		err = -ENOMEM;
1235 		goto out_unmap_config;
1236 	}
1237 
1238 	if (reset) {
1239 		iowrite32(1, card->config_regs + FPGA_MODE);
1240 		ioread32(card->config_regs + FPGA_MODE);
1241 
1242 		iowrite32(0, card->config_regs + FPGA_MODE);
1243 		ioread32(card->config_regs + FPGA_MODE);
1244 	}
1245 
1246 	data32 = ioread32(card->config_regs + FPGA_VER);
1247 	fpga_ver = (data32 & 0x0000FFFF);
1248 	major_ver = ((data32 & 0xFF000000) >> 24);
1249 	minor_ver = ((data32 & 0x00FF0000) >> 16);
1250 	card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1251 	if (card->fpga_version > LEGACY_BUFFERS)
1252 		card->buffer_size = BUF_SIZE;
1253 	else
1254 		card->buffer_size = OLD_BUF_SIZE;
1255 	dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1256 		 major_ver, minor_ver, fpga_ver);
1257 
1258 	if (fpga_ver < 37 && (fpga_upgrade || firmware_upgrade ||
1259 			      db_fpga_upgrade || db_firmware_upgrade)) {
1260 		dev_warn(&dev->dev,
1261 			 "FPGA too old; cannot upgrade flash. Use JTAG.\n");
1262 		fpga_upgrade = firmware_upgrade = 0;
1263 		db_fpga_upgrade = db_firmware_upgrade = 0;
1264 	}
1265 
1266 	/* Stopped using Atmel flash after 0.03-38 */
1267 	if (fpga_ver < 39)
1268 		card->atmel_flash = 1;
1269 	else
1270 		card->atmel_flash = 0;
1271 
1272 	data32 = ioread32(card->config_regs + PORTS);
1273 	card->nr_ports = (data32 & 0x000000FF);
1274 
1275 	if (card->fpga_version >= DMA_SUPPORTED) {
1276 		pci_set_master(dev);
1277 		card->using_dma = 1;
1278 		if (1) { /* All known FPGA versions so far */
1279 			card->dma_alignment = 3;
1280 			card->dma_bounce = kmalloc_array(card->nr_ports,
1281 							 BUF_SIZE, GFP_KERNEL);
1282 			if (!card->dma_bounce) {
1283 				dev_warn(&card->dev->dev, "Failed to allocate DMA bounce buffers\n");
1284 				err = -ENOMEM;
1285 				/* Fallback to MMIO doesn't work */
1286 				goto out_unmap_both;
1287 			}
1288 		}
1289 	} else {
1290 		card->using_dma = 0;
1291 		/* Set RX empty flag for all ports */
1292 		iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1293 	}
1294 
1295 	pci_set_drvdata(dev, card);
1296 
1297 	tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1298 	spin_lock_init(&card->tx_lock);
1299 	spin_lock_init(&card->tx_queue_lock);
1300 	spin_lock_init(&card->cli_queue_lock);
1301 	spin_lock_init(&card->param_queue_lock);
1302 	INIT_LIST_HEAD(&card->param_queue);
1303 
1304 	err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1305 			  "solos-pci", card);
1306 	if (err) {
1307 		dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1308 		goto out_unmap_both;
1309 	}
1310 
1311 	iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1312 
1313 	if (fpga_upgrade)
1314 		flash_upgrade(card, 0);
1315 
1316 	if (firmware_upgrade)
1317 		flash_upgrade(card, 1);
1318 
1319 	if (db_fpga_upgrade)
1320 		flash_upgrade(card, 2);
1321 
1322 	if (db_firmware_upgrade)
1323 		flash_upgrade(card, 3);
1324 
1325 	err = atm_init(card, &dev->dev);
1326 	if (err)
1327 		goto out_free_irq;
1328 
1329 	if (card->fpga_version >= DMA_SUPPORTED &&
1330 	    sysfs_create_group(&card->dev->dev.kobj, &gpio_attr_group))
1331 		dev_err(&card->dev->dev, "Could not register parameter group for GPIOs\n");
1332 
1333 	return 0;
1334 
1335  out_free_irq:
1336 	iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1337 	free_irq(dev->irq, card);
1338 	tasklet_kill(&card->tlet);
1339 
1340  out_unmap_both:
1341 	kfree(card->dma_bounce);
1342 	pci_iounmap(dev, card->buffers);
1343  out_unmap_config:
1344 	pci_iounmap(dev, card->config_regs);
1345  out_release_regions:
1346 	pci_release_regions(dev);
1347  out:
1348 	kfree(card);
1349 	return err;
1350 }
1351 
atm_init(struct solos_card * card,struct device * parent)1352 static int atm_init(struct solos_card *card, struct device *parent)
1353 {
1354 	int i;
1355 
1356 	for (i = 0; i < card->nr_ports; i++) {
1357 		struct sk_buff *skb;
1358 		struct pkt_hdr *header;
1359 
1360 		skb_queue_head_init(&card->tx_queue[i]);
1361 		skb_queue_head_init(&card->cli_queue[i]);
1362 
1363 		card->atmdev[i] = atm_dev_register("solos-pci", parent, &fpga_ops, -1, NULL);
1364 		if (!card->atmdev[i]) {
1365 			dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1366 			atm_remove(card);
1367 			return -ENODEV;
1368 		}
1369 		if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1370 			dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1371 		if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1372 			dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1373 
1374 		dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1375 
1376 		card->atmdev[i]->ci_range.vpi_bits = 8;
1377 		card->atmdev[i]->ci_range.vci_bits = 16;
1378 		card->atmdev[i]->dev_data = card;
1379 		card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1380 		atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);
1381 
1382 		skb = alloc_skb(sizeof(*header), GFP_KERNEL);
1383 		if (!skb) {
1384 			dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1385 			continue;
1386 		}
1387 
1388 		header = skb_put(skb, sizeof(*header));
1389 
1390 		header->size = cpu_to_le16(0);
1391 		header->vpi = cpu_to_le16(0);
1392 		header->vci = cpu_to_le16(0);
1393 		header->type = cpu_to_le16(PKT_STATUS);
1394 
1395 		fpga_queue(card, i, skb, NULL);
1396 	}
1397 	return 0;
1398 }
1399 
atm_remove(struct solos_card * card)1400 static void atm_remove(struct solos_card *card)
1401 {
1402 	int i;
1403 
1404 	for (i = 0; i < card->nr_ports; i++) {
1405 		if (card->atmdev[i]) {
1406 			struct sk_buff *skb;
1407 
1408 			dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1409 
1410 			sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1411 			atm_dev_deregister(card->atmdev[i]);
1412 
1413 			skb = card->rx_skb[i];
1414 			if (skb) {
1415 				dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
1416 						 RX_DMA_SIZE, DMA_FROM_DEVICE);
1417 				dev_kfree_skb(skb);
1418 			}
1419 			skb = card->tx_skb[i];
1420 			if (skb) {
1421 				dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
1422 						 skb->len, DMA_TO_DEVICE);
1423 				dev_kfree_skb(skb);
1424 			}
1425 			while ((skb = skb_dequeue(&card->tx_queue[i])))
1426 				dev_kfree_skb(skb);
1427 
1428 		}
1429 	}
1430 }
1431 
fpga_remove(struct pci_dev * dev)1432 static void fpga_remove(struct pci_dev *dev)
1433 {
1434 	struct solos_card *card = pci_get_drvdata(dev);
1435 
1436 	/* Disable IRQs */
1437 	iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1438 
1439 	/* Reset FPGA */
1440 	iowrite32(1, card->config_regs + FPGA_MODE);
1441 	(void)ioread32(card->config_regs + FPGA_MODE);
1442 
1443 	if (card->fpga_version >= DMA_SUPPORTED)
1444 		sysfs_remove_group(&card->dev->dev.kobj, &gpio_attr_group);
1445 
1446 	atm_remove(card);
1447 
1448 	free_irq(dev->irq, card);
1449 	tasklet_kill(&card->tlet);
1450 
1451 	kfree(card->dma_bounce);
1452 
1453 	/* Release device from reset */
1454 	iowrite32(0, card->config_regs + FPGA_MODE);
1455 	(void)ioread32(card->config_regs + FPGA_MODE);
1456 
1457 	pci_iounmap(dev, card->buffers);
1458 	pci_iounmap(dev, card->config_regs);
1459 
1460 	pci_release_regions(dev);
1461 	pci_disable_device(dev);
1462 
1463 	kfree(card);
1464 }
1465 
1466 static const struct pci_device_id fpga_pci_tbl[] = {
1467 	{ 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1468 	{ 0, }
1469 };
1470 
1471 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1472 
1473 static struct pci_driver fpga_driver = {
1474 	.name =		"solos",
1475 	.id_table =	fpga_pci_tbl,
1476 	.probe =	fpga_probe,
1477 	.remove =	fpga_remove,
1478 };
1479 
1480 
solos_pci_init(void)1481 static int __init solos_pci_init(void)
1482 {
1483 	BUILD_BUG_ON(sizeof(struct solos_skb_cb) > sizeof(((struct sk_buff *)0)->cb));
1484 
1485 	printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1486 	return pci_register_driver(&fpga_driver);
1487 }
1488 
solos_pci_exit(void)1489 static void __exit solos_pci_exit(void)
1490 {
1491 	pci_unregister_driver(&fpga_driver);
1492 	printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1493 }
1494 
1495 module_init(solos_pci_init);
1496 module_exit(solos_pci_exit);
1497