Commit | Line | Data |
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b5e47729 SR |
1 | /* |
2 | * nosy - Snoop mode driver for TI PCILynx 1394 controllers | |
3 | * Copyright (C) 2002-2007 Kristian Høgsberg | |
28646821 SR |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software Foundation, | |
17 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | */ | |
19 | ||
28646821 | 20 | #include <linux/errno.h> |
b5e47729 | 21 | #include <linux/fs.h> |
28646821 | 22 | #include <linux/init.h> |
b5e47729 SR |
23 | #include <linux/interrupt.h> |
24 | #include <linux/io.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/miscdevice.h> | |
27 | #include <linux/module.h> | |
28646821 | 28 | #include <linux/pci.h> |
28646821 | 29 | #include <linux/poll.h> |
b5e47729 SR |
30 | #include <linux/sched.h> /* required for linux/wait.h */ |
31 | #include <linux/slab.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/timex.h> | |
34 | #include <linux/uaccess.h> | |
35 | #include <linux/wait.h> | |
36 | ||
28646821 | 37 | #include <asm/atomic.h> |
b5e47729 | 38 | #include <asm/byteorder.h> |
28646821 SR |
39 | |
40 | #include "nosy.h" | |
41 | #include "nosy-user.h" | |
42 | ||
43 | #define TCODE_PHY_PACKET 0x10 | |
44 | #define PCI_DEVICE_ID_TI_PCILYNX 0x8000 | |
45 | ||
46 | #define notify(s, args...) printk(KERN_NOTICE s, ## args) | |
47 | #define error(s, args...) printk(KERN_ERR s, ## args) | |
48 | #define debug(s, args...) printk(KERN_DEBUG s, ## args) | |
49 | ||
b5e47729 | 50 | static char driver_name[] = KBUILD_MODNAME; |
28646821 SR |
51 | |
52 | struct pcl_status { | |
53 | unsigned int transfer_count : 13; | |
54 | unsigned int reserved0 : 1; | |
55 | unsigned int ack_type : 1; | |
56 | unsigned int ack : 4; | |
57 | unsigned int rcv_speed : 2; | |
58 | unsigned int rcv_dma_channel : 6; | |
59 | unsigned int packet_complete : 1; | |
60 | unsigned int packet_error : 1; | |
61 | unsigned int master_error : 1; | |
62 | unsigned int iso_mode : 1; | |
63 | unsigned int self_id : 1; | |
64 | }; | |
65 | ||
66 | /* this is the physical layout of a PCL, its size is 128 bytes */ | |
67 | struct pcl { | |
68 | u32 next; | |
69 | u32 async_error_next; | |
70 | u32 user_data; | |
71 | struct pcl_status pcl_status; | |
72 | u32 remaining_transfer_count; | |
73 | u32 next_data_buffer; | |
74 | struct { | |
75 | u32 control; | |
76 | u32 pointer; | |
77 | } buffer[13] __attribute__ ((packed)); | |
78 | } __attribute__ ((packed)); | |
79 | ||
80 | struct packet { | |
b5e47729 | 81 | unsigned int length; |
28646821 SR |
82 | char data[0]; |
83 | }; | |
84 | ||
85 | struct packet_buffer { | |
86 | char *data; | |
87 | size_t capacity; | |
88 | long total_packet_count, lost_packet_count; | |
89 | atomic_t size; | |
b5e47729 SR |
90 | struct packet *head, *tail; |
91 | wait_queue_head_t wait; | |
28646821 SR |
92 | }; |
93 | ||
94 | struct pcilynx { | |
95 | struct pci_dev *pci_device; | |
96 | unsigned char *registers; | |
97 | ||
98 | struct pcl *rcv_start_pcl, *rcv_pcl; | |
99 | u32 *rcv_buffer; | |
100 | ||
101 | dma_addr_t rcv_start_pcl_bus, rcv_pcl_bus, rcv_buffer_bus; | |
102 | ||
103 | spinlock_t client_list_lock; | |
104 | struct list_head client_list; | |
105 | ||
106 | struct miscdevice misc; | |
107 | }; | |
108 | ||
28646821 SR |
109 | struct client { |
110 | struct pcilynx *lynx; | |
c7b2a99c | 111 | u32 tcode_mask; |
28646821 SR |
112 | struct packet_buffer buffer; |
113 | struct list_head link; | |
114 | }; | |
115 | ||
116 | #define MAX_MINORS 64 | |
b5e47729 | 117 | static struct pcilynx *minors[MAX_MINORS]; |
28646821 SR |
118 | |
119 | static int | |
120 | packet_buffer_init(struct packet_buffer *buffer, size_t capacity) | |
121 | { | |
122 | buffer->data = kmalloc(capacity, GFP_KERNEL); | |
123 | if (buffer->data == NULL) | |
124 | return -ENOMEM; | |
125 | buffer->head = (struct packet *) buffer->data; | |
126 | buffer->tail = (struct packet *) buffer->data; | |
127 | buffer->capacity = capacity; | |
128 | buffer->lost_packet_count = 0; | |
129 | atomic_set(&buffer->size, 0); | |
b5e47729 | 130 | init_waitqueue_head(&buffer->wait); |
28646821 SR |
131 | |
132 | return 0; | |
133 | } | |
134 | ||
135 | static void | |
136 | packet_buffer_destroy(struct packet_buffer *buffer) | |
137 | { | |
138 | kfree(buffer->data); | |
139 | } | |
140 | ||
141 | static int | |
142 | packet_buffer_get(struct packet_buffer *buffer, void *data, size_t user_length) | |
143 | { | |
144 | size_t length; | |
145 | char *end; | |
146 | ||
147 | if (wait_event_interruptible(buffer->wait, | |
148 | atomic_read(&buffer->size) > 0)) | |
149 | return -ERESTARTSYS; | |
150 | ||
151 | /* FIXME: Check length <= user_length. */ | |
152 | ||
153 | end = buffer->data + buffer->capacity; | |
154 | length = buffer->head->length; | |
155 | ||
156 | if (&buffer->head->data[length] < end) { | |
157 | if (copy_to_user(data, buffer->head->data, length)) | |
158 | return -EFAULT; | |
159 | buffer->head = (struct packet *) &buffer->head->data[length]; | |
b5e47729 | 160 | } else { |
28646821 SR |
161 | size_t split = end - buffer->head->data; |
162 | ||
163 | if (copy_to_user(data, buffer->head->data, split)) | |
164 | return -EFAULT; | |
165 | if (copy_to_user(data + split, buffer->data, length - split)) | |
166 | return -EFAULT; | |
167 | buffer->head = (struct packet *) &buffer->data[length - split]; | |
168 | } | |
169 | ||
b5e47729 SR |
170 | /* |
171 | * Decrease buffer->size as the last thing, since this is what | |
28646821 | 172 | * keeps the interrupt from overwriting the packet we are |
b5e47729 SR |
173 | * retrieving from the buffer. |
174 | */ | |
175 | atomic_sub(sizeof(struct packet) + length, &buffer->size); | |
28646821 SR |
176 | |
177 | return length; | |
178 | } | |
179 | ||
180 | static void | |
181 | packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length) | |
182 | { | |
183 | char *end; | |
184 | ||
185 | buffer->total_packet_count++; | |
186 | ||
b5e47729 SR |
187 | if (buffer->capacity < |
188 | atomic_read(&buffer->size) + sizeof(struct packet) + length) { | |
28646821 SR |
189 | buffer->lost_packet_count++; |
190 | return; | |
191 | } | |
192 | ||
193 | end = buffer->data + buffer->capacity; | |
194 | buffer->tail->length = length; | |
195 | ||
196 | if (&buffer->tail->data[length] < end) { | |
197 | memcpy(buffer->tail->data, data, length); | |
198 | buffer->tail = (struct packet *) &buffer->tail->data[length]; | |
b5e47729 | 199 | } else { |
28646821 SR |
200 | size_t split = end - buffer->tail->data; |
201 | ||
202 | memcpy(buffer->tail->data, data, split); | |
203 | memcpy(buffer->data, data + split, length - split); | |
204 | buffer->tail = (struct packet *) &buffer->data[length - split]; | |
205 | } | |
b5e47729 | 206 | |
28646821 SR |
207 | /* Finally, adjust buffer size and wake up userspace reader. */ |
208 | ||
b5e47729 | 209 | atomic_add(sizeof(struct packet) + length, &buffer->size); |
28646821 SR |
210 | wake_up_interruptible(&buffer->wait); |
211 | } | |
212 | ||
213 | static inline void | |
214 | reg_write(struct pcilynx *lynx, int offset, u32 data) | |
215 | { | |
b5e47729 | 216 | writel(data, lynx->registers + offset); |
28646821 SR |
217 | } |
218 | ||
219 | static inline u32 | |
220 | reg_read(struct pcilynx *lynx, int offset) | |
221 | { | |
b5e47729 | 222 | return readl(lynx->registers + offset); |
28646821 SR |
223 | } |
224 | ||
225 | static inline void | |
226 | reg_set_bits(struct pcilynx *lynx, int offset, u32 mask) | |
227 | { | |
b5e47729 | 228 | reg_write(lynx, offset, (reg_read(lynx, offset) | mask)); |
28646821 SR |
229 | } |
230 | ||
b5e47729 SR |
231 | /* |
232 | * Maybe the pcl programs could be set up to just append data instead | |
233 | * of using a whole packet. | |
234 | */ | |
235 | static inline void | |
236 | run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus, | |
237 | int dmachan) | |
28646821 | 238 | { |
b5e47729 SR |
239 | reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus); |
240 | reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20, | |
241 | DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK); | |
28646821 SR |
242 | } |
243 | ||
244 | static int | |
245 | set_phy_reg(struct pcilynx *lynx, int addr, int val) | |
246 | { | |
b5e47729 SR |
247 | if (addr > 15) { |
248 | debug("PHY register address %d out of range\n", addr); | |
249 | return -1; | |
250 | } | |
251 | ||
252 | if (val > 0xff) { | |
253 | debug("PHY register value %d out of range\n", val); | |
254 | return -1; | |
255 | } | |
256 | ||
257 | reg_write(lynx, LINK_PHY, LINK_PHY_WRITE | | |
28646821 SR |
258 | LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val)); |
259 | ||
b5e47729 | 260 | return 0; |
28646821 SR |
261 | } |
262 | ||
263 | static void | |
264 | nosy_start_snoop(struct client *client) | |
265 | { | |
266 | unsigned long flags; | |
267 | ||
268 | spin_lock_irqsave(&client->lynx->client_list_lock, flags); | |
269 | list_add_tail(&client->link, &client->lynx->client_list); | |
270 | spin_unlock_irqrestore(&client->lynx->client_list_lock, flags); | |
271 | } | |
272 | ||
273 | static void | |
274 | nosy_stop_snoop(struct client *client) | |
275 | { | |
276 | unsigned long flags; | |
277 | ||
278 | spin_lock_irqsave(&client->lynx->client_list_lock, flags); | |
279 | list_del(&client->link); | |
280 | spin_unlock_irqrestore(&client->lynx->client_list_lock, flags); | |
281 | } | |
282 | ||
283 | static struct client * | |
284 | nosy_add_client(struct pcilynx *lynx) | |
285 | { | |
286 | struct client *client; | |
287 | ||
288 | client = kmalloc(sizeof *client, GFP_KERNEL); | |
289 | client->tcode_mask = ~0; | |
290 | client->lynx = lynx; | |
291 | INIT_LIST_HEAD(&client->link); | |
292 | ||
293 | if (packet_buffer_init(&client->buffer, 128 * 1024) < 0) { | |
294 | kfree(client); | |
295 | debug("Failed to allocate packet buffer\n"); | |
296 | return NULL; | |
297 | } | |
298 | ||
299 | return client; | |
300 | } | |
301 | ||
302 | static void | |
303 | nosy_remove_client(struct client *client) | |
304 | { | |
305 | nosy_stop_snoop(client); | |
306 | packet_buffer_destroy(&client->buffer); | |
307 | kfree(client); | |
308 | } | |
309 | ||
310 | static int | |
311 | nosy_open(struct inode *inode, struct file *file) | |
312 | { | |
313 | int minor = iminor(inode); | |
314 | ||
315 | if (minor > MAX_MINORS || minors[minor] == NULL) | |
316 | return -ENODEV; | |
317 | ||
b5e47729 | 318 | file->private_data = nosy_add_client(minors[minor]); |
28646821 SR |
319 | if (file->private_data == NULL) |
320 | return -ENOMEM; | |
321 | else | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static int | |
326 | nosy_release(struct inode *inode, struct file *file) | |
327 | { | |
328 | nosy_remove_client(file->private_data); | |
329 | ||
b5e47729 | 330 | return 0; |
28646821 SR |
331 | } |
332 | ||
333 | static unsigned int | |
334 | nosy_poll(struct file *file, poll_table *pt) | |
335 | { | |
336 | struct client *client = file->private_data; | |
337 | ||
338 | poll_wait(file, &client->buffer.wait, pt); | |
339 | ||
340 | if (atomic_read(&client->buffer.size) > 0) | |
341 | return POLLIN | POLLRDNORM; | |
342 | else | |
343 | return 0; | |
344 | } | |
345 | ||
346 | static ssize_t | |
347 | nosy_read(struct file *file, char *buffer, size_t count, loff_t *offset) | |
348 | { | |
349 | struct client *client = file->private_data; | |
350 | ||
351 | return packet_buffer_get(&client->buffer, buffer, count); | |
352 | } | |
353 | ||
c7b2a99c SR |
354 | static long |
355 | nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
28646821 SR |
356 | { |
357 | struct client *client = file->private_data; | |
c7b2a99c | 358 | spinlock_t *client_list_lock = &client->lynx->client_list_lock; |
b5e47729 | 359 | struct nosy_stats stats; |
28646821 SR |
360 | |
361 | switch (cmd) { | |
b5e47729 | 362 | case NOSY_IOC_GET_STATS: |
c7b2a99c | 363 | spin_lock_irq(client_list_lock); |
28646821 | 364 | stats.total_packet_count = client->buffer.total_packet_count; |
c7b2a99c SR |
365 | stats.lost_packet_count = client->buffer.lost_packet_count; |
366 | spin_unlock_irq(client_list_lock); | |
367 | ||
28646821 SR |
368 | if (copy_to_user((void *) arg, &stats, sizeof stats)) |
369 | return -EFAULT; | |
370 | else | |
371 | return 0; | |
b5e47729 | 372 | |
28646821 SR |
373 | case NOSY_IOC_START: |
374 | nosy_start_snoop(client); | |
375 | return 0; | |
376 | ||
377 | case NOSY_IOC_STOP: | |
378 | nosy_stop_snoop(client); | |
379 | return 0; | |
380 | ||
381 | case NOSY_IOC_FILTER: | |
c7b2a99c | 382 | spin_lock_irq(client_list_lock); |
28646821 | 383 | client->tcode_mask = arg; |
c7b2a99c | 384 | spin_unlock_irq(client_list_lock); |
28646821 SR |
385 | return 0; |
386 | ||
387 | default: | |
388 | return -EINVAL; | |
389 | /* Flush buffer, configure filter. */ | |
390 | } | |
391 | } | |
392 | ||
b5e47729 | 393 | static const struct file_operations nosy_ops = { |
c7b2a99c SR |
394 | .owner = THIS_MODULE, |
395 | .read = nosy_read, | |
396 | .unlocked_ioctl = nosy_ioctl, | |
397 | .poll = nosy_poll, | |
398 | .open = nosy_open, | |
399 | .release = nosy_release, | |
28646821 SR |
400 | }; |
401 | ||
402 | #define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */ | |
403 | ||
404 | struct link_packet { | |
405 | unsigned int priority : 4; | |
406 | unsigned int tcode : 4; | |
407 | unsigned int rt : 2; | |
408 | unsigned int tlabel : 6; | |
409 | unsigned int destination : 16; | |
410 | }; | |
411 | ||
412 | static void | |
413 | packet_handler(struct pcilynx *lynx) | |
414 | { | |
415 | unsigned long flags; | |
28646821 | 416 | struct client *client; |
c7b2a99c | 417 | u32 tcode_mask; |
28646821 SR |
418 | size_t length; |
419 | struct link_packet *packet; | |
420 | struct timeval tv; | |
421 | ||
422 | /* FIXME: Also report rcv_speed. */ | |
423 | ||
424 | length = lynx->rcv_pcl->pcl_status.transfer_count; | |
425 | packet = (struct link_packet *) &lynx->rcv_buffer[1]; | |
426 | ||
427 | do_gettimeofday(&tv); | |
428 | lynx->rcv_buffer[0] = tv.tv_usec; | |
429 | ||
430 | if (length == PHY_PACKET_SIZE) | |
431 | tcode_mask = 1 << TCODE_PHY_PACKET; | |
432 | else | |
433 | tcode_mask = 1 << packet->tcode; | |
434 | ||
435 | spin_lock_irqsave(&lynx->client_list_lock, flags); | |
436 | ||
b5e47729 | 437 | list_for_each_entry(client, &lynx->client_list, link) |
28646821 | 438 | if (client->tcode_mask & tcode_mask) |
b5e47729 | 439 | packet_buffer_put(&client->buffer, |
28646821 | 440 | lynx->rcv_buffer, length + 4); |
28646821 SR |
441 | |
442 | spin_unlock_irqrestore(&lynx->client_list_lock, flags); | |
443 | } | |
444 | ||
445 | static void | |
446 | bus_reset_handler(struct pcilynx *lynx) | |
447 | { | |
448 | unsigned long flags; | |
28646821 SR |
449 | struct client *client; |
450 | struct timeval tv; | |
451 | ||
452 | do_gettimeofday(&tv); | |
453 | ||
454 | spin_lock_irqsave(&lynx->client_list_lock, flags); | |
455 | ||
b5e47729 | 456 | list_for_each_entry(client, &lynx->client_list, link) |
28646821 | 457 | packet_buffer_put(&client->buffer, &tv.tv_usec, 4); |
28646821 SR |
458 | |
459 | spin_unlock_irqrestore(&lynx->client_list_lock, flags); | |
460 | } | |
461 | ||
28646821 SR |
462 | static irqreturn_t |
463 | irq_handler(int irq, void *device) | |
464 | { | |
b5e47729 | 465 | struct pcilynx *lynx = device; |
28646821 | 466 | u32 pci_int_status; |
b5e47729 SR |
467 | |
468 | pci_int_status = reg_read(lynx, PCI_INT_STATUS); | |
28646821 SR |
469 | |
470 | if ((pci_int_status & PCI_INT_INT_PEND) == 0) | |
471 | /* Not our interrupt, bail out quickly. */ | |
472 | return IRQ_NONE; | |
473 | ||
474 | if ((pci_int_status & PCI_INT_P1394_INT) != 0) { | |
475 | u32 link_int_status; | |
476 | ||
477 | link_int_status = reg_read(lynx, LINK_INT_STATUS); | |
478 | reg_write(lynx, LINK_INT_STATUS, link_int_status); | |
479 | ||
480 | if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0) | |
481 | bus_reset_handler(lynx); | |
482 | } | |
483 | ||
484 | /* Clear the PCI_INT_STATUS register only after clearing the | |
485 | * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will | |
486 | * be set again immediately. */ | |
487 | ||
488 | reg_write(lynx, PCI_INT_STATUS, pci_int_status); | |
489 | ||
490 | if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) { | |
491 | packet_handler(lynx); | |
492 | run_pcl(lynx, lynx->rcv_start_pcl_bus, 0); | |
493 | } | |
494 | ||
495 | return IRQ_HANDLED; | |
496 | } | |
497 | ||
498 | static void | |
499 | remove_card(struct pci_dev *dev) | |
500 | { | |
b5e47729 | 501 | struct pcilynx *lynx; |
28646821 | 502 | |
b5e47729 SR |
503 | lynx = pci_get_drvdata(dev); |
504 | if (!lynx) | |
28646821 | 505 | return; |
b5e47729 | 506 | pci_set_drvdata(dev, NULL); |
28646821 SR |
507 | |
508 | reg_write(lynx, PCI_INT_ENABLE, 0); | |
509 | free_irq(lynx->pci_device->irq, lynx); | |
510 | ||
b5e47729 | 511 | pci_free_consistent(lynx->pci_device, sizeof(struct pcl), |
28646821 | 512 | lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus); |
b5e47729 | 513 | pci_free_consistent(lynx->pci_device, sizeof(struct pcl), |
28646821 SR |
514 | lynx->rcv_pcl, lynx->rcv_pcl_bus); |
515 | pci_free_consistent(lynx->pci_device, PAGE_SIZE, | |
516 | lynx->rcv_buffer, lynx->rcv_buffer_bus); | |
517 | ||
518 | iounmap(lynx->registers); | |
519 | ||
520 | minors[lynx->misc.minor] = NULL; | |
521 | misc_deregister(&lynx->misc); | |
522 | ||
523 | kfree(lynx); | |
524 | } | |
525 | ||
526 | #define RCV_BUFFER_SIZE (16 * 1024) | |
527 | ||
28646821 SR |
528 | static int __devinit |
529 | add_card(struct pci_dev *dev, const struct pci_device_id *unused) | |
530 | { | |
b5e47729 | 531 | struct pcilynx *lynx; |
28646821 | 532 | u32 p, end; |
b5e47729 | 533 | int i; |
28646821 | 534 | |
b5e47729 SR |
535 | if (pci_set_dma_mask(dev, 0xffffffff)) { |
536 | error("DMA address limits not supported " | |
537 | "for PCILynx hardware\n"); | |
538 | return -ENXIO; | |
539 | } | |
540 | if (pci_enable_device(dev)) { | |
541 | error("Failed to enable PCILynx hardware\n"); | |
542 | return -ENXIO; | |
543 | } | |
544 | pci_set_master(dev); | |
28646821 SR |
545 | |
546 | lynx = kzalloc(sizeof *lynx, GFP_KERNEL); | |
b5e47729 SR |
547 | if (lynx == NULL) { |
548 | error("Failed to allocate control structure memory\n"); | |
549 | return -ENOMEM; | |
550 | } | |
551 | lynx->pci_device = dev; | |
552 | pci_set_drvdata(dev, lynx); | |
28646821 SR |
553 | |
554 | spin_lock_init(&lynx->client_list_lock); | |
555 | INIT_LIST_HEAD(&lynx->client_list); | |
556 | ||
b5e47729 SR |
557 | lynx->registers = ioremap_nocache(pci_resource_start(dev, 0), |
558 | PCILYNX_MAX_REGISTER); | |
559 | ||
560 | lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device, | |
561 | sizeof(struct pcl), &lynx->rcv_start_pcl_bus); | |
562 | lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device, | |
563 | sizeof(struct pcl), &lynx->rcv_pcl_bus); | |
564 | lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device, | |
565 | RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus); | |
566 | if (lynx->rcv_start_pcl == NULL || | |
28646821 | 567 | lynx->rcv_pcl == NULL || |
b5e47729 | 568 | lynx->rcv_buffer == NULL) { |
28646821 | 569 | /* FIXME: do proper error handling. */ |
b5e47729 SR |
570 | error("Failed to allocate receive buffer\n"); |
571 | return -ENOMEM; | |
572 | } | |
28646821 | 573 | lynx->rcv_start_pcl->next = lynx->rcv_pcl_bus; |
b5e47729 SR |
574 | lynx->rcv_pcl->next = PCL_NEXT_INVALID; |
575 | lynx->rcv_pcl->async_error_next = PCL_NEXT_INVALID; | |
28646821 | 576 | |
b5e47729 | 577 | lynx->rcv_pcl->buffer[0].control = |
28646821 | 578 | PCL_CMD_RCV | PCL_BIGENDIAN | 2044; |
b5e47729 | 579 | lynx->rcv_pcl->buffer[0].pointer = lynx->rcv_buffer_bus + 4; |
28646821 SR |
580 | p = lynx->rcv_buffer_bus + 2048; |
581 | end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE; | |
582 | for (i = 1; p < end; i++, p += 2048) { | |
583 | lynx->rcv_pcl->buffer[i].control = | |
584 | PCL_CMD_RCV | PCL_BIGENDIAN | 2048; | |
585 | lynx->rcv_pcl->buffer[i].pointer = p; | |
586 | } | |
587 | lynx->rcv_pcl->buffer[i - 1].control |= PCL_LAST_BUFF; | |
588 | ||
b5e47729 SR |
589 | reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET); |
590 | /* Fix buggy cards with autoboot pin not tied low: */ | |
591 | reg_write(lynx, DMA0_CHAN_CTRL, 0); | |
592 | reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24); | |
28646821 SR |
593 | |
594 | #if 0 | |
b5e47729 SR |
595 | /* now, looking for PHY register set */ |
596 | if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) { | |
597 | lynx->phyic.reg_1394a = 1; | |
598 | PRINT(KERN_INFO, lynx->id, | |
599 | "found 1394a conform PHY (using extended register set)"); | |
600 | lynx->phyic.vendor = get_phy_vendorid(lynx); | |
601 | lynx->phyic.product = get_phy_productid(lynx); | |
602 | } else { | |
603 | lynx->phyic.reg_1394a = 0; | |
604 | PRINT(KERN_INFO, lynx->id, "found old 1394 PHY"); | |
605 | } | |
28646821 SR |
606 | #endif |
607 | ||
608 | /* Setup the general receive FIFO max size. */ | |
609 | reg_write(lynx, FIFO_SIZES, 255); | |
610 | ||
b5e47729 | 611 | reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL); |
28646821 | 612 | |
b5e47729 | 613 | reg_write(lynx, LINK_INT_ENABLE, |
28646821 SR |
614 | LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD | |
615 | LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK | | |
616 | LINK_INT_AT_STUCK | LINK_INT_SNTRJ | | |
617 | LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW | | |
618 | LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW); | |
619 | ||
620 | /* Disable the L flag in self ID packets. */ | |
621 | set_phy_reg(lynx, 4, 0); | |
622 | ||
623 | /* Put this baby into snoop mode */ | |
624 | reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE); | |
625 | ||
626 | run_pcl(lynx, lynx->rcv_start_pcl_bus, 0); | |
627 | ||
b5e47729 SR |
628 | if (request_irq(dev->irq, irq_handler, IRQF_SHARED, |
629 | driver_name, lynx)) { | |
630 | error("Failed to allocate shared interrupt %d\n", dev->irq); | |
631 | return -EIO; | |
632 | } | |
28646821 SR |
633 | |
634 | lynx->misc.parent = &dev->dev; | |
635 | lynx->misc.minor = MISC_DYNAMIC_MINOR; | |
636 | lynx->misc.name = "nosy"; | |
637 | lynx->misc.fops = &nosy_ops; | |
b5e47729 SR |
638 | if (misc_register(&lynx->misc)) { |
639 | error("Failed to register misc char device\n"); | |
640 | return -ENOMEM; | |
641 | } | |
28646821 SR |
642 | minors[lynx->misc.minor] = lynx; |
643 | ||
644 | notify("Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq); | |
645 | ||
b5e47729 | 646 | return 0; |
28646821 SR |
647 | } |
648 | ||
649 | static struct pci_device_id pci_table[] __devinitdata = { | |
650 | { | |
b5e47729 SR |
651 | .vendor = PCI_VENDOR_ID_TI, |
652 | .device = PCI_DEVICE_ID_TI_PCILYNX, | |
653 | .subvendor = PCI_ANY_ID, | |
654 | .subdevice = PCI_ANY_ID, | |
28646821 SR |
655 | }, |
656 | { } /* Terminating entry */ | |
657 | }; | |
658 | ||
659 | static struct pci_driver lynx_pci_driver = { | |
b5e47729 | 660 | .name = driver_name, |
28646821 SR |
661 | .id_table = pci_table, |
662 | .probe = add_card, | |
b5e47729 | 663 | .remove = remove_card, |
28646821 SR |
664 | }; |
665 | ||
b5e47729 | 666 | MODULE_AUTHOR("Kristian Hoegsberg"); |
28646821 SR |
667 | MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers"); |
668 | MODULE_LICENSE("GPL"); | |
669 | MODULE_DEVICE_TABLE(pci, pci_table); | |
670 | ||
671 | static int __init nosy_init(void) | |
672 | { | |
b5e47729 | 673 | return pci_register_driver(&lynx_pci_driver); |
28646821 SR |
674 | } |
675 | ||
676 | static void __exit nosy_cleanup(void) | |
677 | { | |
b5e47729 | 678 | pci_unregister_driver(&lynx_pci_driver); |
28646821 SR |
679 | |
680 | notify("Unloaded %s.\n", driver_name); | |
681 | } | |
682 | ||
28646821 SR |
683 | module_init(nosy_init); |
684 | module_exit(nosy_cleanup); |