Commit | Line | Data |
---|---|---|
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 | ||
7429b17d | 20 | #include <linux/device.h> |
28646821 | 21 | #include <linux/errno.h> |
b5e47729 | 22 | #include <linux/fs.h> |
28646821 | 23 | #include <linux/init.h> |
b5e47729 SR |
24 | #include <linux/interrupt.h> |
25 | #include <linux/io.h> | |
26 | #include <linux/kernel.h> | |
424d66ce | 27 | #include <linux/kref.h> |
b5e47729 SR |
28 | #include <linux/miscdevice.h> |
29 | #include <linux/module.h> | |
424d66ce | 30 | #include <linux/mutex.h> |
28646821 | 31 | #include <linux/pci.h> |
28646821 | 32 | #include <linux/poll.h> |
b5e47729 SR |
33 | #include <linux/sched.h> /* required for linux/wait.h */ |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
2ae4b6b2 | 36 | #include <linux/time64.h> |
b5e47729 SR |
37 | #include <linux/timex.h> |
38 | #include <linux/uaccess.h> | |
39 | #include <linux/wait.h> | |
e894d1d7 | 40 | #include <linux/dma-mapping.h> |
60063497 | 41 | #include <linux/atomic.h> |
b5e47729 | 42 | #include <asm/byteorder.h> |
28646821 SR |
43 | |
44 | #include "nosy.h" | |
45 | #include "nosy-user.h" | |
46 | ||
47 | #define TCODE_PHY_PACKET 0x10 | |
48 | #define PCI_DEVICE_ID_TI_PCILYNX 0x8000 | |
49 | ||
b5e47729 | 50 | static char driver_name[] = KBUILD_MODNAME; |
28646821 | 51 | |
28646821 SR |
52 | /* this is the physical layout of a PCL, its size is 128 bytes */ |
53 | struct pcl { | |
fd8c8d46 SR |
54 | __le32 next; |
55 | __le32 async_error_next; | |
56 | u32 user_data; | |
57 | __le32 pcl_status; | |
58 | __le32 remaining_transfer_count; | |
59 | __le32 next_data_buffer; | |
60 | struct { | |
61 | __le32 control; | |
62 | __le32 pointer; | |
63 | } buffer[13]; | |
64 | }; | |
28646821 SR |
65 | |
66 | struct packet { | |
b5e47729 | 67 | unsigned int length; |
28646821 SR |
68 | char data[0]; |
69 | }; | |
70 | ||
71 | struct packet_buffer { | |
72 | char *data; | |
73 | size_t capacity; | |
74 | long total_packet_count, lost_packet_count; | |
75 | atomic_t size; | |
b5e47729 SR |
76 | struct packet *head, *tail; |
77 | wait_queue_head_t wait; | |
28646821 SR |
78 | }; |
79 | ||
80 | struct pcilynx { | |
81 | struct pci_dev *pci_device; | |
c89db7b8 | 82 | __iomem char *registers; |
28646821 SR |
83 | |
84 | struct pcl *rcv_start_pcl, *rcv_pcl; | |
fd8c8d46 | 85 | __le32 *rcv_buffer; |
28646821 SR |
86 | |
87 | dma_addr_t rcv_start_pcl_bus, rcv_pcl_bus, rcv_buffer_bus; | |
88 | ||
89 | spinlock_t client_list_lock; | |
90 | struct list_head client_list; | |
91 | ||
92 | struct miscdevice misc; | |
424d66ce SR |
93 | struct list_head link; |
94 | struct kref kref; | |
28646821 SR |
95 | }; |
96 | ||
424d66ce SR |
97 | static inline struct pcilynx * |
98 | lynx_get(struct pcilynx *lynx) | |
99 | { | |
100 | kref_get(&lynx->kref); | |
101 | ||
102 | return lynx; | |
103 | } | |
104 | ||
105 | static void | |
106 | lynx_release(struct kref *kref) | |
107 | { | |
108 | kfree(container_of(kref, struct pcilynx, kref)); | |
109 | } | |
110 | ||
111 | static inline void | |
112 | lynx_put(struct pcilynx *lynx) | |
113 | { | |
114 | kref_put(&lynx->kref, lynx_release); | |
115 | } | |
116 | ||
28646821 SR |
117 | struct client { |
118 | struct pcilynx *lynx; | |
c7b2a99c | 119 | u32 tcode_mask; |
28646821 SR |
120 | struct packet_buffer buffer; |
121 | struct list_head link; | |
122 | }; | |
123 | ||
424d66ce SR |
124 | static DEFINE_MUTEX(card_mutex); |
125 | static LIST_HEAD(card_list); | |
28646821 SR |
126 | |
127 | static int | |
128 | packet_buffer_init(struct packet_buffer *buffer, size_t capacity) | |
129 | { | |
130 | buffer->data = kmalloc(capacity, GFP_KERNEL); | |
131 | if (buffer->data == NULL) | |
132 | return -ENOMEM; | |
133 | buffer->head = (struct packet *) buffer->data; | |
134 | buffer->tail = (struct packet *) buffer->data; | |
135 | buffer->capacity = capacity; | |
136 | buffer->lost_packet_count = 0; | |
137 | atomic_set(&buffer->size, 0); | |
b5e47729 | 138 | init_waitqueue_head(&buffer->wait); |
28646821 SR |
139 | |
140 | return 0; | |
141 | } | |
142 | ||
143 | static void | |
144 | packet_buffer_destroy(struct packet_buffer *buffer) | |
145 | { | |
146 | kfree(buffer->data); | |
147 | } | |
148 | ||
149 | static int | |
c89db7b8 | 150 | packet_buffer_get(struct client *client, char __user *data, size_t user_length) |
28646821 | 151 | { |
424d66ce | 152 | struct packet_buffer *buffer = &client->buffer; |
28646821 SR |
153 | size_t length; |
154 | char *end; | |
155 | ||
156 | if (wait_event_interruptible(buffer->wait, | |
424d66ce SR |
157 | atomic_read(&buffer->size) > 0) || |
158 | list_empty(&client->lynx->link)) | |
28646821 SR |
159 | return -ERESTARTSYS; |
160 | ||
424d66ce SR |
161 | if (atomic_read(&buffer->size) == 0) |
162 | return -ENODEV; | |
163 | ||
28646821 SR |
164 | /* FIXME: Check length <= user_length. */ |
165 | ||
166 | end = buffer->data + buffer->capacity; | |
167 | length = buffer->head->length; | |
168 | ||
169 | if (&buffer->head->data[length] < end) { | |
170 | if (copy_to_user(data, buffer->head->data, length)) | |
171 | return -EFAULT; | |
172 | buffer->head = (struct packet *) &buffer->head->data[length]; | |
b5e47729 | 173 | } else { |
28646821 SR |
174 | size_t split = end - buffer->head->data; |
175 | ||
176 | if (copy_to_user(data, buffer->head->data, split)) | |
177 | return -EFAULT; | |
178 | if (copy_to_user(data + split, buffer->data, length - split)) | |
179 | return -EFAULT; | |
180 | buffer->head = (struct packet *) &buffer->data[length - split]; | |
181 | } | |
182 | ||
b5e47729 SR |
183 | /* |
184 | * Decrease buffer->size as the last thing, since this is what | |
28646821 | 185 | * keeps the interrupt from overwriting the packet we are |
b5e47729 SR |
186 | * retrieving from the buffer. |
187 | */ | |
188 | atomic_sub(sizeof(struct packet) + length, &buffer->size); | |
28646821 SR |
189 | |
190 | return length; | |
191 | } | |
192 | ||
193 | static void | |
194 | packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length) | |
195 | { | |
196 | char *end; | |
197 | ||
198 | buffer->total_packet_count++; | |
199 | ||
b5e47729 SR |
200 | if (buffer->capacity < |
201 | atomic_read(&buffer->size) + sizeof(struct packet) + length) { | |
28646821 SR |
202 | buffer->lost_packet_count++; |
203 | return; | |
204 | } | |
205 | ||
206 | end = buffer->data + buffer->capacity; | |
207 | buffer->tail->length = length; | |
208 | ||
209 | if (&buffer->tail->data[length] < end) { | |
210 | memcpy(buffer->tail->data, data, length); | |
211 | buffer->tail = (struct packet *) &buffer->tail->data[length]; | |
b5e47729 | 212 | } else { |
28646821 SR |
213 | size_t split = end - buffer->tail->data; |
214 | ||
215 | memcpy(buffer->tail->data, data, split); | |
216 | memcpy(buffer->data, data + split, length - split); | |
217 | buffer->tail = (struct packet *) &buffer->data[length - split]; | |
218 | } | |
b5e47729 | 219 | |
28646821 SR |
220 | /* Finally, adjust buffer size and wake up userspace reader. */ |
221 | ||
b5e47729 | 222 | atomic_add(sizeof(struct packet) + length, &buffer->size); |
28646821 SR |
223 | wake_up_interruptible(&buffer->wait); |
224 | } | |
225 | ||
226 | static inline void | |
227 | reg_write(struct pcilynx *lynx, int offset, u32 data) | |
228 | { | |
b5e47729 | 229 | writel(data, lynx->registers + offset); |
28646821 SR |
230 | } |
231 | ||
232 | static inline u32 | |
233 | reg_read(struct pcilynx *lynx, int offset) | |
234 | { | |
b5e47729 | 235 | return readl(lynx->registers + offset); |
28646821 SR |
236 | } |
237 | ||
238 | static inline void | |
239 | reg_set_bits(struct pcilynx *lynx, int offset, u32 mask) | |
240 | { | |
b5e47729 | 241 | reg_write(lynx, offset, (reg_read(lynx, offset) | mask)); |
28646821 SR |
242 | } |
243 | ||
b5e47729 SR |
244 | /* |
245 | * Maybe the pcl programs could be set up to just append data instead | |
246 | * of using a whole packet. | |
247 | */ | |
248 | static inline void | |
249 | run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus, | |
250 | int dmachan) | |
28646821 | 251 | { |
b5e47729 SR |
252 | reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus); |
253 | reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20, | |
254 | DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK); | |
28646821 SR |
255 | } |
256 | ||
257 | static int | |
258 | set_phy_reg(struct pcilynx *lynx, int addr, int val) | |
259 | { | |
b5e47729 | 260 | if (addr > 15) { |
7429b17d SR |
261 | dev_err(&lynx->pci_device->dev, |
262 | "PHY register address %d out of range\n", addr); | |
b5e47729 SR |
263 | return -1; |
264 | } | |
b5e47729 | 265 | if (val > 0xff) { |
7429b17d SR |
266 | dev_err(&lynx->pci_device->dev, |
267 | "PHY register value %d out of range\n", val); | |
b5e47729 SR |
268 | return -1; |
269 | } | |
b5e47729 | 270 | reg_write(lynx, LINK_PHY, LINK_PHY_WRITE | |
28646821 SR |
271 | LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val)); |
272 | ||
b5e47729 | 273 | return 0; |
28646821 SR |
274 | } |
275 | ||
55e77c06 SR |
276 | static int |
277 | nosy_open(struct inode *inode, struct file *file) | |
28646821 | 278 | { |
55e77c06 | 279 | int minor = iminor(inode); |
28646821 | 280 | struct client *client; |
424d66ce SR |
281 | struct pcilynx *tmp, *lynx = NULL; |
282 | ||
283 | mutex_lock(&card_mutex); | |
284 | list_for_each_entry(tmp, &card_list, link) | |
285 | if (tmp->misc.minor == minor) { | |
286 | lynx = lynx_get(tmp); | |
287 | break; | |
288 | } | |
289 | mutex_unlock(&card_mutex); | |
290 | if (lynx == NULL) | |
55e77c06 SR |
291 | return -ENODEV; |
292 | ||
28646821 | 293 | client = kmalloc(sizeof *client, GFP_KERNEL); |
55e77c06 | 294 | if (client == NULL) |
424d66ce | 295 | goto fail; |
55e77c06 | 296 | |
28646821 | 297 | client->tcode_mask = ~0; |
424d66ce | 298 | client->lynx = lynx; |
28646821 SR |
299 | INIT_LIST_HEAD(&client->link); |
300 | ||
424d66ce SR |
301 | if (packet_buffer_init(&client->buffer, 128 * 1024) < 0) |
302 | goto fail; | |
28646821 | 303 | |
55e77c06 | 304 | file->private_data = client; |
28646821 | 305 | |
60a74a6f | 306 | return nonseekable_open(inode, file); |
424d66ce SR |
307 | fail: |
308 | kfree(client); | |
309 | lynx_put(lynx); | |
310 | ||
311 | return -ENOMEM; | |
28646821 SR |
312 | } |
313 | ||
314 | static int | |
55e77c06 | 315 | nosy_release(struct inode *inode, struct file *file) |
28646821 | 316 | { |
55e77c06 | 317 | struct client *client = file->private_data; |
424d66ce | 318 | struct pcilynx *lynx = client->lynx; |
28646821 | 319 | |
424d66ce | 320 | spin_lock_irq(&lynx->client_list_lock); |
55e77c06 | 321 | list_del_init(&client->link); |
424d66ce | 322 | spin_unlock_irq(&lynx->client_list_lock); |
28646821 | 323 | |
55e77c06 SR |
324 | packet_buffer_destroy(&client->buffer); |
325 | kfree(client); | |
424d66ce | 326 | lynx_put(lynx); |
28646821 | 327 | |
b5e47729 | 328 | return 0; |
28646821 SR |
329 | } |
330 | ||
331 | static unsigned int | |
332 | nosy_poll(struct file *file, poll_table *pt) | |
333 | { | |
334 | struct client *client = file->private_data; | |
424d66ce | 335 | unsigned int ret = 0; |
28646821 SR |
336 | |
337 | poll_wait(file, &client->buffer.wait, pt); | |
338 | ||
339 | if (atomic_read(&client->buffer.size) > 0) | |
424d66ce SR |
340 | ret = POLLIN | POLLRDNORM; |
341 | ||
342 | if (list_empty(&client->lynx->link)) | |
343 | ret |= POLLHUP; | |
344 | ||
345 | return ret; | |
28646821 SR |
346 | } |
347 | ||
348 | static ssize_t | |
c89db7b8 | 349 | nosy_read(struct file *file, char __user *buffer, size_t count, loff_t *offset) |
28646821 SR |
350 | { |
351 | struct client *client = file->private_data; | |
352 | ||
424d66ce | 353 | return packet_buffer_get(client, buffer, count); |
28646821 SR |
354 | } |
355 | ||
c7b2a99c SR |
356 | static long |
357 | nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
28646821 SR |
358 | { |
359 | struct client *client = file->private_data; | |
c7b2a99c | 360 | spinlock_t *client_list_lock = &client->lynx->client_list_lock; |
b5e47729 | 361 | struct nosy_stats stats; |
28646821 SR |
362 | |
363 | switch (cmd) { | |
b5e47729 | 364 | case NOSY_IOC_GET_STATS: |
c7b2a99c | 365 | spin_lock_irq(client_list_lock); |
28646821 | 366 | stats.total_packet_count = client->buffer.total_packet_count; |
c7b2a99c SR |
367 | stats.lost_packet_count = client->buffer.lost_packet_count; |
368 | spin_unlock_irq(client_list_lock); | |
369 | ||
c89db7b8 | 370 | if (copy_to_user((void __user *) arg, &stats, sizeof stats)) |
28646821 SR |
371 | return -EFAULT; |
372 | else | |
373 | return 0; | |
b5e47729 | 374 | |
28646821 | 375 | case NOSY_IOC_START: |
55e77c06 SR |
376 | spin_lock_irq(client_list_lock); |
377 | list_add_tail(&client->link, &client->lynx->client_list); | |
378 | spin_unlock_irq(client_list_lock); | |
379 | ||
28646821 SR |
380 | return 0; |
381 | ||
382 | case NOSY_IOC_STOP: | |
55e77c06 SR |
383 | spin_lock_irq(client_list_lock); |
384 | list_del_init(&client->link); | |
385 | spin_unlock_irq(client_list_lock); | |
386 | ||
28646821 SR |
387 | return 0; |
388 | ||
389 | case NOSY_IOC_FILTER: | |
c7b2a99c | 390 | spin_lock_irq(client_list_lock); |
28646821 | 391 | client->tcode_mask = arg; |
c7b2a99c | 392 | spin_unlock_irq(client_list_lock); |
55e77c06 | 393 | |
28646821 SR |
394 | return 0; |
395 | ||
396 | default: | |
397 | return -EINVAL; | |
398 | /* Flush buffer, configure filter. */ | |
399 | } | |
400 | } | |
401 | ||
b5e47729 | 402 | static const struct file_operations nosy_ops = { |
c7b2a99c SR |
403 | .owner = THIS_MODULE, |
404 | .read = nosy_read, | |
405 | .unlocked_ioctl = nosy_ioctl, | |
406 | .poll = nosy_poll, | |
407 | .open = nosy_open, | |
408 | .release = nosy_release, | |
28646821 SR |
409 | }; |
410 | ||
411 | #define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */ | |
412 | ||
28646821 | 413 | static void |
685c3f80 | 414 | packet_irq_handler(struct pcilynx *lynx) |
28646821 | 415 | { |
28646821 | 416 | struct client *client; |
2ae4b6b2 | 417 | u32 tcode_mask, tcode, timestamp; |
28646821 | 418 | size_t length; |
2ae4b6b2 | 419 | struct timespec64 ts64; |
28646821 SR |
420 | |
421 | /* FIXME: Also report rcv_speed. */ | |
422 | ||
fd8c8d46 SR |
423 | length = __le32_to_cpu(lynx->rcv_pcl->pcl_status) & 0x00001fff; |
424 | tcode = __le32_to_cpu(lynx->rcv_buffer[1]) >> 4 & 0xf; | |
28646821 | 425 | |
2ae4b6b2 AKC |
426 | ktime_get_real_ts64(&ts64); |
427 | timestamp = ts64.tv_nsec / NSEC_PER_USEC; | |
428 | lynx->rcv_buffer[0] = (__force __le32)timestamp; | |
28646821 SR |
429 | |
430 | if (length == PHY_PACKET_SIZE) | |
431 | tcode_mask = 1 << TCODE_PHY_PACKET; | |
432 | else | |
fd8c8d46 | 433 | tcode_mask = 1 << tcode; |
28646821 | 434 | |
685c3f80 | 435 | spin_lock(&lynx->client_list_lock); |
28646821 | 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 | 441 | |
685c3f80 | 442 | spin_unlock(&lynx->client_list_lock); |
28646821 SR |
443 | } |
444 | ||
445 | static void | |
685c3f80 | 446 | bus_reset_irq_handler(struct pcilynx *lynx) |
28646821 | 447 | { |
28646821 | 448 | struct client *client; |
384fbb96 TR |
449 | struct timespec64 ts64; |
450 | u32 timestamp; | |
28646821 | 451 | |
384fbb96 TR |
452 | ktime_get_real_ts64(&ts64); |
453 | timestamp = ts64.tv_nsec / NSEC_PER_USEC; | |
28646821 | 454 | |
685c3f80 | 455 | spin_lock(&lynx->client_list_lock); |
28646821 | 456 | |
b5e47729 | 457 | list_for_each_entry(client, &lynx->client_list, link) |
384fbb96 | 458 | packet_buffer_put(&client->buffer, ×tamp, 4); |
28646821 | 459 | |
685c3f80 | 460 | spin_unlock(&lynx->client_list_lock); |
28646821 SR |
461 | } |
462 | ||
28646821 SR |
463 | static irqreturn_t |
464 | irq_handler(int irq, void *device) | |
465 | { | |
b5e47729 | 466 | struct pcilynx *lynx = device; |
28646821 | 467 | u32 pci_int_status; |
b5e47729 SR |
468 | |
469 | pci_int_status = reg_read(lynx, PCI_INT_STATUS); | |
28646821 | 470 | |
16547667 SR |
471 | if (pci_int_status == ~0) |
472 | /* Card was ejected. */ | |
473 | return IRQ_NONE; | |
474 | ||
28646821 SR |
475 | if ((pci_int_status & PCI_INT_INT_PEND) == 0) |
476 | /* Not our interrupt, bail out quickly. */ | |
477 | return IRQ_NONE; | |
478 | ||
479 | if ((pci_int_status & PCI_INT_P1394_INT) != 0) { | |
480 | u32 link_int_status; | |
481 | ||
482 | link_int_status = reg_read(lynx, LINK_INT_STATUS); | |
483 | reg_write(lynx, LINK_INT_STATUS, link_int_status); | |
484 | ||
485 | if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0) | |
685c3f80 | 486 | bus_reset_irq_handler(lynx); |
28646821 SR |
487 | } |
488 | ||
489 | /* Clear the PCI_INT_STATUS register only after clearing the | |
490 | * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will | |
491 | * be set again immediately. */ | |
492 | ||
493 | reg_write(lynx, PCI_INT_STATUS, pci_int_status); | |
494 | ||
495 | if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) { | |
685c3f80 | 496 | packet_irq_handler(lynx); |
28646821 SR |
497 | run_pcl(lynx, lynx->rcv_start_pcl_bus, 0); |
498 | } | |
499 | ||
500 | return IRQ_HANDLED; | |
501 | } | |
502 | ||
503 | static void | |
504 | remove_card(struct pci_dev *dev) | |
505 | { | |
424d66ce SR |
506 | struct pcilynx *lynx = pci_get_drvdata(dev); |
507 | struct client *client; | |
28646821 | 508 | |
424d66ce SR |
509 | mutex_lock(&card_mutex); |
510 | list_del_init(&lynx->link); | |
511 | misc_deregister(&lynx->misc); | |
512 | mutex_unlock(&card_mutex); | |
28646821 SR |
513 | |
514 | reg_write(lynx, PCI_INT_ENABLE, 0); | |
515 | free_irq(lynx->pci_device->irq, lynx); | |
516 | ||
424d66ce SR |
517 | spin_lock_irq(&lynx->client_list_lock); |
518 | list_for_each_entry(client, &lynx->client_list, link) | |
519 | wake_up_interruptible(&client->buffer.wait); | |
520 | spin_unlock_irq(&lynx->client_list_lock); | |
521 | ||
b5e47729 | 522 | pci_free_consistent(lynx->pci_device, sizeof(struct pcl), |
28646821 | 523 | lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus); |
b5e47729 | 524 | pci_free_consistent(lynx->pci_device, sizeof(struct pcl), |
28646821 SR |
525 | lynx->rcv_pcl, lynx->rcv_pcl_bus); |
526 | pci_free_consistent(lynx->pci_device, PAGE_SIZE, | |
527 | lynx->rcv_buffer, lynx->rcv_buffer_bus); | |
528 | ||
529 | iounmap(lynx->registers); | |
b6d9c125 | 530 | pci_disable_device(dev); |
424d66ce | 531 | lynx_put(lynx); |
28646821 SR |
532 | } |
533 | ||
534 | #define RCV_BUFFER_SIZE (16 * 1024) | |
535 | ||
03f94c0f | 536 | static int |
28646821 SR |
537 | add_card(struct pci_dev *dev, const struct pci_device_id *unused) |
538 | { | |
b5e47729 | 539 | struct pcilynx *lynx; |
28646821 | 540 | u32 p, end; |
b6d9c125 | 541 | int ret, i; |
28646821 | 542 | |
e894d1d7 | 543 | if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) { |
7429b17d SR |
544 | dev_err(&dev->dev, |
545 | "DMA address limits not supported for PCILynx hardware\n"); | |
b5e47729 SR |
546 | return -ENXIO; |
547 | } | |
548 | if (pci_enable_device(dev)) { | |
7429b17d | 549 | dev_err(&dev->dev, "Failed to enable PCILynx hardware\n"); |
b5e47729 SR |
550 | return -ENXIO; |
551 | } | |
552 | pci_set_master(dev); | |
28646821 SR |
553 | |
554 | lynx = kzalloc(sizeof *lynx, GFP_KERNEL); | |
b5e47729 | 555 | if (lynx == NULL) { |
7429b17d | 556 | dev_err(&dev->dev, "Failed to allocate control structure\n"); |
b6d9c125 SR |
557 | ret = -ENOMEM; |
558 | goto fail_disable; | |
b5e47729 SR |
559 | } |
560 | lynx->pci_device = dev; | |
561 | pci_set_drvdata(dev, lynx); | |
28646821 SR |
562 | |
563 | spin_lock_init(&lynx->client_list_lock); | |
564 | INIT_LIST_HEAD(&lynx->client_list); | |
424d66ce | 565 | kref_init(&lynx->kref); |
28646821 | 566 | |
b5e47729 SR |
567 | lynx->registers = ioremap_nocache(pci_resource_start(dev, 0), |
568 | PCILYNX_MAX_REGISTER); | |
569 | ||
570 | lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device, | |
571 | sizeof(struct pcl), &lynx->rcv_start_pcl_bus); | |
572 | lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device, | |
573 | sizeof(struct pcl), &lynx->rcv_pcl_bus); | |
574 | lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device, | |
575 | RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus); | |
576 | if (lynx->rcv_start_pcl == NULL || | |
28646821 | 577 | lynx->rcv_pcl == NULL || |
b5e47729 | 578 | lynx->rcv_buffer == NULL) { |
7429b17d | 579 | dev_err(&dev->dev, "Failed to allocate receive buffer\n"); |
b6d9c125 SR |
580 | ret = -ENOMEM; |
581 | goto fail_deallocate; | |
b5e47729 | 582 | } |
fd8c8d46 SR |
583 | lynx->rcv_start_pcl->next = cpu_to_le32(lynx->rcv_pcl_bus); |
584 | lynx->rcv_pcl->next = cpu_to_le32(PCL_NEXT_INVALID); | |
585 | lynx->rcv_pcl->async_error_next = cpu_to_le32(PCL_NEXT_INVALID); | |
28646821 | 586 | |
b5e47729 | 587 | lynx->rcv_pcl->buffer[0].control = |
fd8c8d46 SR |
588 | cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2044); |
589 | lynx->rcv_pcl->buffer[0].pointer = | |
590 | cpu_to_le32(lynx->rcv_buffer_bus + 4); | |
28646821 SR |
591 | p = lynx->rcv_buffer_bus + 2048; |
592 | end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE; | |
593 | for (i = 1; p < end; i++, p += 2048) { | |
594 | lynx->rcv_pcl->buffer[i].control = | |
fd8c8d46 SR |
595 | cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2048); |
596 | lynx->rcv_pcl->buffer[i].pointer = cpu_to_le32(p); | |
28646821 | 597 | } |
fd8c8d46 | 598 | lynx->rcv_pcl->buffer[i - 1].control |= cpu_to_le32(PCL_LAST_BUFF); |
28646821 | 599 | |
b5e47729 SR |
600 | reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET); |
601 | /* Fix buggy cards with autoboot pin not tied low: */ | |
602 | reg_write(lynx, DMA0_CHAN_CTRL, 0); | |
603 | reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24); | |
28646821 SR |
604 | |
605 | #if 0 | |
b5e47729 SR |
606 | /* now, looking for PHY register set */ |
607 | if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) { | |
608 | lynx->phyic.reg_1394a = 1; | |
609 | PRINT(KERN_INFO, lynx->id, | |
610 | "found 1394a conform PHY (using extended register set)"); | |
611 | lynx->phyic.vendor = get_phy_vendorid(lynx); | |
612 | lynx->phyic.product = get_phy_productid(lynx); | |
613 | } else { | |
614 | lynx->phyic.reg_1394a = 0; | |
615 | PRINT(KERN_INFO, lynx->id, "found old 1394 PHY"); | |
616 | } | |
28646821 SR |
617 | #endif |
618 | ||
619 | /* Setup the general receive FIFO max size. */ | |
620 | reg_write(lynx, FIFO_SIZES, 255); | |
621 | ||
b5e47729 | 622 | reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL); |
28646821 | 623 | |
b5e47729 | 624 | reg_write(lynx, LINK_INT_ENABLE, |
28646821 SR |
625 | LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD | |
626 | LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK | | |
627 | LINK_INT_AT_STUCK | LINK_INT_SNTRJ | | |
628 | LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW | | |
629 | LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW); | |
630 | ||
631 | /* Disable the L flag in self ID packets. */ | |
632 | set_phy_reg(lynx, 4, 0); | |
633 | ||
634 | /* Put this baby into snoop mode */ | |
635 | reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE); | |
636 | ||
637 | run_pcl(lynx, lynx->rcv_start_pcl_bus, 0); | |
638 | ||
b5e47729 SR |
639 | if (request_irq(dev->irq, irq_handler, IRQF_SHARED, |
640 | driver_name, lynx)) { | |
7429b17d SR |
641 | dev_err(&dev->dev, |
642 | "Failed to allocate shared interrupt %d\n", dev->irq); | |
b6d9c125 SR |
643 | ret = -EIO; |
644 | goto fail_deallocate; | |
b5e47729 | 645 | } |
28646821 SR |
646 | |
647 | lynx->misc.parent = &dev->dev; | |
648 | lynx->misc.minor = MISC_DYNAMIC_MINOR; | |
649 | lynx->misc.name = "nosy"; | |
650 | lynx->misc.fops = &nosy_ops; | |
424d66ce SR |
651 | |
652 | mutex_lock(&card_mutex); | |
b6d9c125 SR |
653 | ret = misc_register(&lynx->misc); |
654 | if (ret) { | |
7429b17d | 655 | dev_err(&dev->dev, "Failed to register misc char device\n"); |
424d66ce | 656 | mutex_unlock(&card_mutex); |
b6d9c125 | 657 | goto fail_free_irq; |
b5e47729 | 658 | } |
424d66ce SR |
659 | list_add_tail(&lynx->link, &card_list); |
660 | mutex_unlock(&card_mutex); | |
28646821 | 661 | |
7429b17d SR |
662 | dev_info(&dev->dev, |
663 | "Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq); | |
28646821 | 664 | |
b5e47729 | 665 | return 0; |
b6d9c125 SR |
666 | |
667 | fail_free_irq: | |
668 | reg_write(lynx, PCI_INT_ENABLE, 0); | |
669 | free_irq(lynx->pci_device->irq, lynx); | |
670 | ||
671 | fail_deallocate: | |
672 | if (lynx->rcv_start_pcl) | |
673 | pci_free_consistent(lynx->pci_device, sizeof(struct pcl), | |
674 | lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus); | |
675 | if (lynx->rcv_pcl) | |
676 | pci_free_consistent(lynx->pci_device, sizeof(struct pcl), | |
677 | lynx->rcv_pcl, lynx->rcv_pcl_bus); | |
678 | if (lynx->rcv_buffer) | |
679 | pci_free_consistent(lynx->pci_device, PAGE_SIZE, | |
680 | lynx->rcv_buffer, lynx->rcv_buffer_bus); | |
681 | iounmap(lynx->registers); | |
682 | kfree(lynx); | |
683 | ||
684 | fail_disable: | |
685 | pci_disable_device(dev); | |
686 | ||
687 | return ret; | |
28646821 SR |
688 | } |
689 | ||
7eeb7418 | 690 | static struct pci_device_id pci_table[] = { |
28646821 | 691 | { |
b5e47729 SR |
692 | .vendor = PCI_VENDOR_ID_TI, |
693 | .device = PCI_DEVICE_ID_TI_PCILYNX, | |
694 | .subvendor = PCI_ANY_ID, | |
695 | .subdevice = PCI_ANY_ID, | |
28646821 SR |
696 | }, |
697 | { } /* Terminating entry */ | |
698 | }; | |
699 | ||
fe2af11c AL |
700 | MODULE_DEVICE_TABLE(pci, pci_table); |
701 | ||
28646821 | 702 | static struct pci_driver lynx_pci_driver = { |
b5e47729 | 703 | .name = driver_name, |
28646821 SR |
704 | .id_table = pci_table, |
705 | .probe = add_card, | |
b5e47729 | 706 | .remove = remove_card, |
28646821 SR |
707 | }; |
708 | ||
fe2af11c AL |
709 | module_pci_driver(lynx_pci_driver); |
710 | ||
b5e47729 | 711 | MODULE_AUTHOR("Kristian Hoegsberg"); |
28646821 SR |
712 | MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers"); |
713 | MODULE_LICENSE("GPL"); |