Commit | Line | Data |
---|---|---|
e01402b1 RB |
1 | /* |
2 | * Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved. | |
a84c96e2 | 3 | * Copyright (C) 2005, 06 Ralf Baechle (ralf@linux-mips.org) |
e01402b1 RB |
4 | * |
5 | * This program is free software; you can distribute it and/or modify it | |
6 | * under the terms of the GNU General Public License (Version 2) as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
17 | * | |
18 | */ | |
19 | ||
bb3d7c7f | 20 | #include <linux/device.h> |
e01402b1 RB |
21 | #include <linux/kernel.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/init.h> | |
2600990e RB |
25 | #include <asm/uaccess.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/list.h> | |
28 | #include <linux/vmalloc.h> | |
29 | #include <linux/elf.h> | |
30 | #include <linux/seq_file.h> | |
7558da94 | 31 | #include <linux/smp_lock.h> |
2600990e RB |
32 | #include <linux/syscalls.h> |
33 | #include <linux/moduleloader.h> | |
a84c96e2 | 34 | #include <linux/interrupt.h> |
e01402b1 RB |
35 | #include <linux/poll.h> |
36 | #include <linux/sched.h> | |
37 | #include <linux/wait.h> | |
38 | #include <asm/mipsmtregs.h> | |
bb3d7c7f | 39 | #include <asm/mips_mt.h> |
2600990e RB |
40 | #include <asm/cacheflush.h> |
41 | #include <asm/atomic.h> | |
e01402b1 RB |
42 | #include <asm/cpu.h> |
43 | #include <asm/processor.h> | |
2600990e RB |
44 | #include <asm/system.h> |
45 | #include <asm/vpe.h> | |
e01402b1 RB |
46 | #include <asm/rtlx.h> |
47 | ||
afc4841d | 48 | static struct rtlx_info *rtlx; |
e01402b1 RB |
49 | static int major; |
50 | static char module_name[] = "rtlx"; | |
e01402b1 RB |
51 | |
52 | static struct chan_waitqueues { | |
53 | wait_queue_head_t rt_queue; | |
54 | wait_queue_head_t lx_queue; | |
c4c4018b | 55 | atomic_t in_open; |
bc4809e9 | 56 | struct mutex mutex; |
e01402b1 RB |
57 | } channel_wqs[RTLX_CHANNELS]; |
58 | ||
2600990e | 59 | static struct vpe_notifications notify; |
982f6ffe | 60 | static int sp_stopping; |
2600990e | 61 | |
e01402b1 RB |
62 | extern void *vpe_get_shared(int index); |
63 | ||
937a8015 | 64 | static void rtlx_dispatch(void) |
e01402b1 | 65 | { |
97dcb82d | 66 | do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ); |
e01402b1 RB |
67 | } |
68 | ||
2600990e RB |
69 | |
70 | /* Interrupt handler may be called before rtlx_init has otherwise had | |
71 | a chance to run. | |
72 | */ | |
937a8015 | 73 | static irqreturn_t rtlx_interrupt(int irq, void *dev_id) |
e01402b1 | 74 | { |
e01402b1 | 75 | int i; |
1928cc84 KK |
76 | unsigned int flags, vpeflags; |
77 | ||
78 | /* Ought not to be strictly necessary for SMTC builds */ | |
79 | local_irq_save(flags); | |
80 | vpeflags = dvpe(); | |
81 | set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ); | |
82 | irq_enable_hazard(); | |
83 | evpe(vpeflags); | |
84 | local_irq_restore(flags); | |
e01402b1 RB |
85 | |
86 | for (i = 0; i < RTLX_CHANNELS; i++) { | |
2600990e RB |
87 | wake_up(&channel_wqs[i].lx_queue); |
88 | wake_up(&channel_wqs[i].rt_queue); | |
e01402b1 RB |
89 | } |
90 | ||
afc4841d | 91 | return IRQ_HANDLED; |
e01402b1 RB |
92 | } |
93 | ||
f5dbeaf5 | 94 | static void __used dump_rtlx(void) |
e01402b1 RB |
95 | { |
96 | int i; | |
97 | ||
2600990e | 98 | printk("id 0x%lx state %d\n", rtlx->id, rtlx->state); |
e01402b1 | 99 | |
e01402b1 | 100 | for (i = 0; i < RTLX_CHANNELS; i++) { |
2600990e | 101 | struct rtlx_channel *chan = &rtlx->channel[i]; |
e01402b1 | 102 | |
2600990e RB |
103 | printk(" rt_state %d lx_state %d buffer_size %d\n", |
104 | chan->rt_state, chan->lx_state, chan->buffer_size); | |
e01402b1 | 105 | |
2600990e RB |
106 | printk(" rt_read %d rt_write %d\n", |
107 | chan->rt_read, chan->rt_write); | |
e01402b1 | 108 | |
2600990e RB |
109 | printk(" lx_read %d lx_write %d\n", |
110 | chan->lx_read, chan->lx_write); | |
111 | ||
112 | printk(" rt_buffer <%s>\n", chan->rt_buffer); | |
113 | printk(" lx_buffer <%s>\n", chan->lx_buffer); | |
114 | } | |
115 | } | |
116 | ||
117 | /* call when we have the address of the shared structure from the SP side. */ | |
118 | static int rtlx_init(struct rtlx_info *rtlxi) | |
119 | { | |
120 | if (rtlxi->id != RTLX_ID) { | |
1928cc84 KK |
121 | printk(KERN_ERR "no valid RTLX id at 0x%p 0x%lx\n", |
122 | rtlxi, rtlxi->id); | |
2600990e RB |
123 | return -ENOEXEC; |
124 | } | |
e01402b1 RB |
125 | |
126 | rtlx = rtlxi; | |
afc4841d RB |
127 | |
128 | return 0; | |
e01402b1 RB |
129 | } |
130 | ||
2600990e RB |
131 | /* notifications */ |
132 | static void starting(int vpe) | |
e01402b1 | 133 | { |
2600990e RB |
134 | int i; |
135 | sp_stopping = 0; | |
136 | ||
137 | /* force a reload of rtlx */ | |
138 | rtlx=NULL; | |
139 | ||
140 | /* wake up any sleeping rtlx_open's */ | |
141 | for (i = 0; i < RTLX_CHANNELS; i++) | |
142 | wake_up_interruptible(&channel_wqs[i].lx_queue); | |
143 | } | |
144 | ||
145 | static void stopping(int vpe) | |
146 | { | |
147 | int i; | |
148 | ||
149 | sp_stopping = 1; | |
150 | for (i = 0; i < RTLX_CHANNELS; i++) | |
151 | wake_up_interruptible(&channel_wqs[i].lx_queue); | |
152 | } | |
153 | ||
154 | ||
155 | int rtlx_open(int index, int can_sleep) | |
156 | { | |
9e346820 | 157 | struct rtlx_info **p; |
67e2ccce | 158 | struct rtlx_channel *chan; |
c4c4018b | 159 | enum rtlx_state state; |
67e2ccce | 160 | int ret = 0; |
e01402b1 | 161 | |
2600990e RB |
162 | if (index >= RTLX_CHANNELS) { |
163 | printk(KERN_DEBUG "rtlx_open index out of range\n"); | |
164 | return -ENOSYS; | |
165 | } | |
166 | ||
c4c4018b RB |
167 | if (atomic_inc_return(&channel_wqs[index].in_open) > 1) { |
168 | printk(KERN_DEBUG "rtlx_open channel %d already opened\n", | |
169 | index); | |
170 | ret = -EBUSY; | |
171 | goto out_fail; | |
2600990e RB |
172 | } |
173 | ||
e01402b1 | 174 | if (rtlx == NULL) { |
07cc0c9e | 175 | if( (p = vpe_get_shared(tclimit)) == NULL) { |
1928cc84 KK |
176 | if (can_sleep) { |
177 | __wait_event_interruptible(channel_wqs[index].lx_queue, | |
178 | (p = vpe_get_shared(tclimit)), ret); | |
179 | if (ret) | |
67e2ccce | 180 | goto out_fail; |
1928cc84 KK |
181 | } else { |
182 | printk(KERN_DEBUG "No SP program loaded, and device " | |
183 | "opened with O_NONBLOCK\n"); | |
184 | ret = -ENOSYS; | |
185 | goto out_fail; | |
186 | } | |
e01402b1 RB |
187 | } |
188 | ||
9e346820 | 189 | smp_rmb(); |
e01402b1 | 190 | if (*p == NULL) { |
2600990e | 191 | if (can_sleep) { |
9e346820 RB |
192 | DEFINE_WAIT(wait); |
193 | ||
194 | for (;;) { | |
1928cc84 KK |
195 | prepare_to_wait( |
196 | &channel_wqs[index].lx_queue, | |
197 | &wait, TASK_INTERRUPTIBLE); | |
9e346820 RB |
198 | smp_rmb(); |
199 | if (*p != NULL) | |
200 | break; | |
201 | if (!signal_pending(current)) { | |
202 | schedule(); | |
203 | continue; | |
204 | } | |
205 | ret = -ERESTARTSYS; | |
67e2ccce | 206 | goto out_fail; |
9e346820 RB |
207 | } |
208 | finish_wait(&channel_wqs[index].lx_queue, &wait); | |
67e2ccce | 209 | } else { |
1928cc84 | 210 | pr_err(" *vpe_get_shared is NULL. " |
2600990e | 211 | "Has an SP program been loaded?\n"); |
67e2ccce RB |
212 | ret = -ENOSYS; |
213 | goto out_fail; | |
2600990e RB |
214 | } |
215 | } | |
216 | ||
217 | if ((unsigned int)*p < KSEG0) { | |
1928cc84 KK |
218 | printk(KERN_WARNING "vpe_get_shared returned an " |
219 | "invalid pointer maybe an error code %d\n", | |
220 | (int)*p); | |
67e2ccce RB |
221 | ret = -ENOSYS; |
222 | goto out_fail; | |
e01402b1 RB |
223 | } |
224 | ||
c4c4018b RB |
225 | if ((ret = rtlx_init(*p)) < 0) |
226 | goto out_ret; | |
e01402b1 RB |
227 | } |
228 | ||
2600990e | 229 | chan = &rtlx->channel[index]; |
e01402b1 | 230 | |
c4c4018b RB |
231 | state = xchg(&chan->lx_state, RTLX_STATE_OPENED); |
232 | if (state == RTLX_STATE_OPENED) { | |
233 | ret = -EBUSY; | |
234 | goto out_fail; | |
235 | } | |
67e2ccce RB |
236 | |
237 | out_fail: | |
c4c4018b RB |
238 | smp_mb(); |
239 | atomic_dec(&channel_wqs[index].in_open); | |
240 | smp_mb(); | |
67e2ccce | 241 | |
c4c4018b | 242 | out_ret: |
67e2ccce | 243 | return ret; |
e01402b1 RB |
244 | } |
245 | ||
2600990e | 246 | int rtlx_release(int index) |
e01402b1 | 247 | { |
1928cc84 KK |
248 | if (rtlx == NULL) { |
249 | pr_err("rtlx_release() with null rtlx\n"); | |
250 | return 0; | |
251 | } | |
2600990e | 252 | rtlx->channel[index].lx_state = RTLX_STATE_UNUSED; |
afc4841d | 253 | return 0; |
e01402b1 RB |
254 | } |
255 | ||
2600990e | 256 | unsigned int rtlx_read_poll(int index, int can_sleep) |
e01402b1 | 257 | { |
2600990e | 258 | struct rtlx_channel *chan; |
e01402b1 | 259 | |
2600990e RB |
260 | if (rtlx == NULL) |
261 | return 0; | |
e01402b1 | 262 | |
2600990e | 263 | chan = &rtlx->channel[index]; |
e01402b1 RB |
264 | |
265 | /* data available to read? */ | |
2600990e RB |
266 | if (chan->lx_read == chan->lx_write) { |
267 | if (can_sleep) { | |
67e2ccce | 268 | int ret = 0; |
e01402b1 | 269 | |
67e2ccce | 270 | __wait_event_interruptible(channel_wqs[index].lx_queue, |
1928cc84 KK |
271 | (chan->lx_read != chan->lx_write) || |
272 | sp_stopping, ret); | |
67e2ccce RB |
273 | if (ret) |
274 | return ret; | |
e01402b1 | 275 | |
67e2ccce RB |
276 | if (sp_stopping) |
277 | return 0; | |
278 | } else | |
2600990e RB |
279 | return 0; |
280 | } | |
281 | ||
282 | return (chan->lx_write + chan->buffer_size - chan->lx_read) | |
283 | % chan->buffer_size; | |
e01402b1 RB |
284 | } |
285 | ||
2600990e | 286 | static inline int write_spacefree(int read, int write, int size) |
e01402b1 | 287 | { |
2600990e RB |
288 | if (read == write) { |
289 | /* | |
290 | * Never fill the buffer completely, so indexes are always | |
291 | * equal if empty and only empty, or !equal if data available | |
292 | */ | |
293 | return size - 1; | |
294 | } | |
e01402b1 | 295 | |
2600990e RB |
296 | return ((read + size - write) % size) - 1; |
297 | } | |
e01402b1 | 298 | |
2600990e RB |
299 | unsigned int rtlx_write_poll(int index) |
300 | { | |
301 | struct rtlx_channel *chan = &rtlx->channel[index]; | |
1928cc84 KK |
302 | |
303 | return write_spacefree(chan->rt_read, chan->rt_write, | |
304 | chan->buffer_size); | |
2600990e | 305 | } |
e01402b1 | 306 | |
7f5a7716 | 307 | ssize_t rtlx_read(int index, void __user *buff, size_t count) |
2600990e | 308 | { |
61dcc6f4 | 309 | size_t lx_write, fl = 0L; |
2600990e | 310 | struct rtlx_channel *lx; |
46230aa6 | 311 | unsigned long failed; |
e01402b1 | 312 | |
2600990e RB |
313 | if (rtlx == NULL) |
314 | return -ENOSYS; | |
315 | ||
316 | lx = &rtlx->channel[index]; | |
e01402b1 | 317 | |
bc4809e9 | 318 | mutex_lock(&channel_wqs[index].mutex); |
61dcc6f4 RB |
319 | smp_rmb(); |
320 | lx_write = lx->lx_write; | |
321 | ||
e01402b1 | 322 | /* find out how much in total */ |
afc4841d | 323 | count = min(count, |
61dcc6f4 | 324 | (size_t)(lx_write + lx->buffer_size - lx->lx_read) |
2600990e | 325 | % lx->buffer_size); |
e01402b1 RB |
326 | |
327 | /* then how much from the read pointer onwards */ | |
61dcc6f4 | 328 | fl = min(count, (size_t)lx->buffer_size - lx->lx_read); |
e01402b1 | 329 | |
46230aa6 RB |
330 | failed = copy_to_user(buff, lx->lx_buffer + lx->lx_read, fl); |
331 | if (failed) | |
332 | goto out; | |
e01402b1 RB |
333 | |
334 | /* and if there is anything left at the beginning of the buffer */ | |
61dcc6f4 | 335 | if (count - fl) |
46230aa6 RB |
336 | failed = copy_to_user(buff + fl, lx->lx_buffer, count - fl); |
337 | ||
338 | out: | |
339 | count -= failed; | |
e01402b1 | 340 | |
61dcc6f4 RB |
341 | smp_wmb(); |
342 | lx->lx_read = (lx->lx_read + count) % lx->buffer_size; | |
343 | smp_wmb(); | |
bc4809e9 | 344 | mutex_unlock(&channel_wqs[index].mutex); |
e01402b1 | 345 | |
afc4841d | 346 | return count; |
e01402b1 RB |
347 | } |
348 | ||
7f5a7716 | 349 | ssize_t rtlx_write(int index, const void __user *buffer, size_t count) |
2600990e RB |
350 | { |
351 | struct rtlx_channel *rt; | |
7f5a7716 | 352 | unsigned long failed; |
61dcc6f4 | 353 | size_t rt_read; |
2600990e RB |
354 | size_t fl; |
355 | ||
356 | if (rtlx == NULL) | |
357 | return(-ENOSYS); | |
358 | ||
359 | rt = &rtlx->channel[index]; | |
360 | ||
bc4809e9 | 361 | mutex_lock(&channel_wqs[index].mutex); |
61dcc6f4 RB |
362 | smp_rmb(); |
363 | rt_read = rt->rt_read; | |
364 | ||
2600990e | 365 | /* total number of bytes to copy */ |
1928cc84 KK |
366 | count = min(count, (size_t)write_spacefree(rt_read, rt->rt_write, |
367 | rt->buffer_size)); | |
2600990e RB |
368 | |
369 | /* first bit from write pointer to the end of the buffer, or count */ | |
370 | fl = min(count, (size_t) rt->buffer_size - rt->rt_write); | |
371 | ||
46230aa6 RB |
372 | failed = copy_from_user(rt->rt_buffer + rt->rt_write, buffer, fl); |
373 | if (failed) | |
374 | goto out; | |
2600990e RB |
375 | |
376 | /* if there's any left copy to the beginning of the buffer */ | |
46230aa6 RB |
377 | if (count - fl) { |
378 | failed = copy_from_user(rt->rt_buffer, buffer + fl, count - fl); | |
379 | } | |
380 | ||
381 | out: | |
7f5a7716 | 382 | count -= failed; |
2600990e | 383 | |
61dcc6f4 RB |
384 | smp_wmb(); |
385 | rt->rt_write = (rt->rt_write + count) % rt->buffer_size; | |
386 | smp_wmb(); | |
bc4809e9 | 387 | mutex_unlock(&channel_wqs[index].mutex); |
2600990e | 388 | |
61dcc6f4 | 389 | return count; |
2600990e RB |
390 | } |
391 | ||
392 | ||
393 | static int file_open(struct inode *inode, struct file *filp) | |
394 | { | |
79e55bcf | 395 | int minor = iminor(inode); |
7558da94 | 396 | int err; |
2600990e | 397 | |
7558da94 JC |
398 | lock_kernel(); |
399 | err = rtlx_open(minor, (filp->f_flags & O_NONBLOCK) ? 0 : 1); | |
400 | unlock_kernel(); | |
401 | return err; | |
2600990e RB |
402 | } |
403 | ||
404 | static int file_release(struct inode *inode, struct file *filp) | |
405 | { | |
79e55bcf | 406 | int minor = iminor(inode); |
2600990e RB |
407 | |
408 | return rtlx_release(minor); | |
409 | } | |
410 | ||
411 | static unsigned int file_poll(struct file *file, poll_table * wait) | |
412 | { | |
413 | int minor; | |
414 | unsigned int mask = 0; | |
415 | ||
1b04fe9a | 416 | minor = iminor(file->f_path.dentry->d_inode); |
2600990e RB |
417 | |
418 | poll_wait(file, &channel_wqs[minor].rt_queue, wait); | |
419 | poll_wait(file, &channel_wqs[minor].lx_queue, wait); | |
420 | ||
421 | if (rtlx == NULL) | |
422 | return 0; | |
423 | ||
424 | /* data available to read? */ | |
425 | if (rtlx_read_poll(minor, 0)) | |
426 | mask |= POLLIN | POLLRDNORM; | |
427 | ||
428 | /* space to write */ | |
429 | if (rtlx_write_poll(minor)) | |
430 | mask |= POLLOUT | POLLWRNORM; | |
431 | ||
432 | return mask; | |
433 | } | |
434 | ||
435 | static ssize_t file_read(struct file *file, char __user * buffer, size_t count, | |
436 | loff_t * ppos) | |
437 | { | |
1b04fe9a | 438 | int minor = iminor(file->f_path.dentry->d_inode); |
2600990e RB |
439 | |
440 | /* data available? */ | |
441 | if (!rtlx_read_poll(minor, (file->f_flags & O_NONBLOCK) ? 0 : 1)) { | |
442 | return 0; // -EAGAIN makes cat whinge | |
443 | } | |
444 | ||
46230aa6 | 445 | return rtlx_read(minor, buffer, count); |
2600990e RB |
446 | } |
447 | ||
448 | static ssize_t file_write(struct file *file, const char __user * buffer, | |
e01402b1 RB |
449 | size_t count, loff_t * ppos) |
450 | { | |
451 | int minor; | |
452 | struct rtlx_channel *rt; | |
e01402b1 | 453 | |
1b04fe9a | 454 | minor = iminor(file->f_path.dentry->d_inode); |
e01402b1 RB |
455 | rt = &rtlx->channel[minor]; |
456 | ||
457 | /* any space left... */ | |
2600990e | 458 | if (!rtlx_write_poll(minor)) { |
67e2ccce | 459 | int ret = 0; |
e01402b1 RB |
460 | |
461 | if (file->f_flags & O_NONBLOCK) | |
afc4841d | 462 | return -EAGAIN; |
e01402b1 | 463 | |
67e2ccce RB |
464 | __wait_event_interruptible(channel_wqs[minor].rt_queue, |
465 | rtlx_write_poll(minor), | |
466 | ret); | |
467 | if (ret) | |
468 | return ret; | |
e01402b1 RB |
469 | } |
470 | ||
46230aa6 | 471 | return rtlx_write(minor, buffer, count); |
e01402b1 RB |
472 | } |
473 | ||
5dfe4c96 | 474 | static const struct file_operations rtlx_fops = { |
2600990e RB |
475 | .owner = THIS_MODULE, |
476 | .open = file_open, | |
477 | .release = file_release, | |
478 | .write = file_write, | |
479 | .read = file_read, | |
480 | .poll = file_poll | |
e01402b1 RB |
481 | }; |
482 | ||
2600990e RB |
483 | static struct irqaction rtlx_irq = { |
484 | .handler = rtlx_interrupt, | |
f40298fd | 485 | .flags = IRQF_DISABLED, |
2600990e RB |
486 | .name = "RTLX", |
487 | }; | |
488 | ||
97dcb82d | 489 | static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ; |
2600990e | 490 | |
afc4841d RB |
491 | static char register_chrdev_failed[] __initdata = |
492 | KERN_ERR "rtlx_module_init: unable to register device\n"; | |
493 | ||
9d5a3f5f | 494 | static int __init rtlx_module_init(void) |
e01402b1 | 495 | { |
bb3d7c7f RB |
496 | struct device *dev; |
497 | int i, err; | |
2600990e | 498 | |
07cc0c9e RB |
499 | if (!cpu_has_mipsmt) { |
500 | printk("VPE loader: not a MIPS MT capable processor\n"); | |
501 | return -ENODEV; | |
502 | } | |
503 | ||
504 | if (tclimit == 0) { | |
505 | printk(KERN_WARNING "No TCs reserved for AP/SP, not " | |
506 | "initializing RTLX.\nPass maxtcs=<n> argument as kernel " | |
507 | "argument\n"); | |
508 | ||
509 | return -ENODEV; | |
510 | } | |
511 | ||
afc4841d RB |
512 | major = register_chrdev(0, module_name, &rtlx_fops); |
513 | if (major < 0) { | |
514 | printk(register_chrdev_failed); | |
515 | return major; | |
e01402b1 RB |
516 | } |
517 | ||
2600990e RB |
518 | /* initialise the wait queues */ |
519 | for (i = 0; i < RTLX_CHANNELS; i++) { | |
520 | init_waitqueue_head(&channel_wqs[i].rt_queue); | |
521 | init_waitqueue_head(&channel_wqs[i].lx_queue); | |
c4c4018b | 522 | atomic_set(&channel_wqs[i].in_open, 0); |
bc4809e9 | 523 | mutex_init(&channel_wqs[i].mutex); |
bb3d7c7f | 524 | |
a9b12619 GKH |
525 | dev = device_create(mt_class, NULL, MKDEV(major, i), NULL, |
526 | "%s%d", module_name, i); | |
bb3d7c7f RB |
527 | if (IS_ERR(dev)) { |
528 | err = PTR_ERR(dev); | |
529 | goto out_chrdev; | |
530 | } | |
2600990e RB |
531 | } |
532 | ||
533 | /* set up notifiers */ | |
534 | notify.start = starting; | |
535 | notify.stop = stopping; | |
07cc0c9e | 536 | vpe_notify(tclimit, ¬ify); |
2600990e RB |
537 | |
538 | if (cpu_has_vint) | |
539 | set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch); | |
1928cc84 KK |
540 | else { |
541 | pr_err("APRP RTLX init on non-vectored-interrupt processor\n"); | |
542 | err = -ENODEV; | |
543 | goto out_chrdev; | |
544 | } | |
2600990e RB |
545 | |
546 | rtlx_irq.dev_id = rtlx; | |
547 | setup_irq(rtlx_irq_num, &rtlx_irq); | |
548 | ||
afc4841d | 549 | return 0; |
bb3d7c7f RB |
550 | |
551 | out_chrdev: | |
552 | for (i = 0; i < RTLX_CHANNELS; i++) | |
553 | device_destroy(mt_class, MKDEV(major, i)); | |
554 | ||
555 | return err; | |
e01402b1 RB |
556 | } |
557 | ||
afc4841d | 558 | static void __exit rtlx_module_exit(void) |
e01402b1 | 559 | { |
bb3d7c7f RB |
560 | int i; |
561 | ||
562 | for (i = 0; i < RTLX_CHANNELS; i++) | |
563 | device_destroy(mt_class, MKDEV(major, i)); | |
564 | ||
e01402b1 RB |
565 | unregister_chrdev(major, module_name); |
566 | } | |
567 | ||
568 | module_init(rtlx_module_init); | |
569 | module_exit(rtlx_module_exit); | |
afc4841d | 570 | |
e01402b1 | 571 | MODULE_DESCRIPTION("MIPS RTLX"); |
2600990e | 572 | MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); |
e01402b1 | 573 | MODULE_LICENSE("GPL"); |