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Commit | Line | Data |
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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 | { |
1bbfc20d RB |
75 | unsigned int vpeflags; |
76 | unsigned long flags; | |
e01402b1 | 77 | int i; |
1928cc84 KK |
78 | |
79 | /* Ought not to be strictly necessary for SMTC builds */ | |
80 | local_irq_save(flags); | |
81 | vpeflags = dvpe(); | |
82 | set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ); | |
83 | irq_enable_hazard(); | |
84 | evpe(vpeflags); | |
85 | local_irq_restore(flags); | |
e01402b1 RB |
86 | |
87 | for (i = 0; i < RTLX_CHANNELS; i++) { | |
2600990e RB |
88 | wake_up(&channel_wqs[i].lx_queue); |
89 | wake_up(&channel_wqs[i].rt_queue); | |
e01402b1 RB |
90 | } |
91 | ||
afc4841d | 92 | return IRQ_HANDLED; |
e01402b1 RB |
93 | } |
94 | ||
f5dbeaf5 | 95 | static void __used dump_rtlx(void) |
e01402b1 RB |
96 | { |
97 | int i; | |
98 | ||
2600990e | 99 | printk("id 0x%lx state %d\n", rtlx->id, rtlx->state); |
e01402b1 | 100 | |
e01402b1 | 101 | for (i = 0; i < RTLX_CHANNELS; i++) { |
2600990e | 102 | struct rtlx_channel *chan = &rtlx->channel[i]; |
e01402b1 | 103 | |
2600990e RB |
104 | printk(" rt_state %d lx_state %d buffer_size %d\n", |
105 | chan->rt_state, chan->lx_state, chan->buffer_size); | |
e01402b1 | 106 | |
2600990e RB |
107 | printk(" rt_read %d rt_write %d\n", |
108 | chan->rt_read, chan->rt_write); | |
e01402b1 | 109 | |
2600990e RB |
110 | printk(" lx_read %d lx_write %d\n", |
111 | chan->lx_read, chan->lx_write); | |
112 | ||
113 | printk(" rt_buffer <%s>\n", chan->rt_buffer); | |
114 | printk(" lx_buffer <%s>\n", chan->lx_buffer); | |
115 | } | |
116 | } | |
117 | ||
118 | /* call when we have the address of the shared structure from the SP side. */ | |
119 | static int rtlx_init(struct rtlx_info *rtlxi) | |
120 | { | |
121 | if (rtlxi->id != RTLX_ID) { | |
1928cc84 KK |
122 | printk(KERN_ERR "no valid RTLX id at 0x%p 0x%lx\n", |
123 | rtlxi, rtlxi->id); | |
2600990e RB |
124 | return -ENOEXEC; |
125 | } | |
e01402b1 RB |
126 | |
127 | rtlx = rtlxi; | |
afc4841d RB |
128 | |
129 | return 0; | |
e01402b1 RB |
130 | } |
131 | ||
2600990e RB |
132 | /* notifications */ |
133 | static void starting(int vpe) | |
e01402b1 | 134 | { |
2600990e RB |
135 | int i; |
136 | sp_stopping = 0; | |
137 | ||
138 | /* force a reload of rtlx */ | |
139 | rtlx=NULL; | |
140 | ||
141 | /* wake up any sleeping rtlx_open's */ | |
142 | for (i = 0; i < RTLX_CHANNELS; i++) | |
143 | wake_up_interruptible(&channel_wqs[i].lx_queue); | |
144 | } | |
145 | ||
146 | static void stopping(int vpe) | |
147 | { | |
148 | int i; | |
149 | ||
150 | sp_stopping = 1; | |
151 | for (i = 0; i < RTLX_CHANNELS; i++) | |
152 | wake_up_interruptible(&channel_wqs[i].lx_queue); | |
153 | } | |
154 | ||
155 | ||
156 | int rtlx_open(int index, int can_sleep) | |
157 | { | |
9e346820 | 158 | struct rtlx_info **p; |
67e2ccce | 159 | struct rtlx_channel *chan; |
c4c4018b | 160 | enum rtlx_state state; |
67e2ccce | 161 | int ret = 0; |
e01402b1 | 162 | |
2600990e RB |
163 | if (index >= RTLX_CHANNELS) { |
164 | printk(KERN_DEBUG "rtlx_open index out of range\n"); | |
165 | return -ENOSYS; | |
166 | } | |
167 | ||
c4c4018b RB |
168 | if (atomic_inc_return(&channel_wqs[index].in_open) > 1) { |
169 | printk(KERN_DEBUG "rtlx_open channel %d already opened\n", | |
170 | index); | |
171 | ret = -EBUSY; | |
172 | goto out_fail; | |
2600990e RB |
173 | } |
174 | ||
e01402b1 | 175 | if (rtlx == NULL) { |
07cc0c9e | 176 | if( (p = vpe_get_shared(tclimit)) == NULL) { |
1928cc84 KK |
177 | if (can_sleep) { |
178 | __wait_event_interruptible(channel_wqs[index].lx_queue, | |
179 | (p = vpe_get_shared(tclimit)), ret); | |
180 | if (ret) | |
67e2ccce | 181 | goto out_fail; |
1928cc84 KK |
182 | } else { |
183 | printk(KERN_DEBUG "No SP program loaded, and device " | |
184 | "opened with O_NONBLOCK\n"); | |
185 | ret = -ENOSYS; | |
186 | goto out_fail; | |
187 | } | |
e01402b1 RB |
188 | } |
189 | ||
9e346820 | 190 | smp_rmb(); |
e01402b1 | 191 | if (*p == NULL) { |
2600990e | 192 | if (can_sleep) { |
9e346820 RB |
193 | DEFINE_WAIT(wait); |
194 | ||
195 | for (;;) { | |
1928cc84 KK |
196 | prepare_to_wait( |
197 | &channel_wqs[index].lx_queue, | |
198 | &wait, TASK_INTERRUPTIBLE); | |
9e346820 RB |
199 | smp_rmb(); |
200 | if (*p != NULL) | |
201 | break; | |
202 | if (!signal_pending(current)) { | |
203 | schedule(); | |
204 | continue; | |
205 | } | |
206 | ret = -ERESTARTSYS; | |
67e2ccce | 207 | goto out_fail; |
9e346820 RB |
208 | } |
209 | finish_wait(&channel_wqs[index].lx_queue, &wait); | |
67e2ccce | 210 | } else { |
1928cc84 | 211 | pr_err(" *vpe_get_shared is NULL. " |
2600990e | 212 | "Has an SP program been loaded?\n"); |
67e2ccce RB |
213 | ret = -ENOSYS; |
214 | goto out_fail; | |
2600990e RB |
215 | } |
216 | } | |
217 | ||
218 | if ((unsigned int)*p < KSEG0) { | |
1928cc84 KK |
219 | printk(KERN_WARNING "vpe_get_shared returned an " |
220 | "invalid pointer maybe an error code %d\n", | |
221 | (int)*p); | |
67e2ccce RB |
222 | ret = -ENOSYS; |
223 | goto out_fail; | |
e01402b1 RB |
224 | } |
225 | ||
c4c4018b RB |
226 | if ((ret = rtlx_init(*p)) < 0) |
227 | goto out_ret; | |
e01402b1 RB |
228 | } |
229 | ||
2600990e | 230 | chan = &rtlx->channel[index]; |
e01402b1 | 231 | |
c4c4018b RB |
232 | state = xchg(&chan->lx_state, RTLX_STATE_OPENED); |
233 | if (state == RTLX_STATE_OPENED) { | |
234 | ret = -EBUSY; | |
235 | goto out_fail; | |
236 | } | |
67e2ccce RB |
237 | |
238 | out_fail: | |
c4c4018b RB |
239 | smp_mb(); |
240 | atomic_dec(&channel_wqs[index].in_open); | |
241 | smp_mb(); | |
67e2ccce | 242 | |
c4c4018b | 243 | out_ret: |
67e2ccce | 244 | return ret; |
e01402b1 RB |
245 | } |
246 | ||
2600990e | 247 | int rtlx_release(int index) |
e01402b1 | 248 | { |
1928cc84 KK |
249 | if (rtlx == NULL) { |
250 | pr_err("rtlx_release() with null rtlx\n"); | |
251 | return 0; | |
252 | } | |
2600990e | 253 | rtlx->channel[index].lx_state = RTLX_STATE_UNUSED; |
afc4841d | 254 | return 0; |
e01402b1 RB |
255 | } |
256 | ||
2600990e | 257 | unsigned int rtlx_read_poll(int index, int can_sleep) |
e01402b1 | 258 | { |
2600990e | 259 | struct rtlx_channel *chan; |
e01402b1 | 260 | |
2600990e RB |
261 | if (rtlx == NULL) |
262 | return 0; | |
e01402b1 | 263 | |
2600990e | 264 | chan = &rtlx->channel[index]; |
e01402b1 RB |
265 | |
266 | /* data available to read? */ | |
2600990e RB |
267 | if (chan->lx_read == chan->lx_write) { |
268 | if (can_sleep) { | |
67e2ccce | 269 | int ret = 0; |
e01402b1 | 270 | |
67e2ccce | 271 | __wait_event_interruptible(channel_wqs[index].lx_queue, |
1928cc84 KK |
272 | (chan->lx_read != chan->lx_write) || |
273 | sp_stopping, ret); | |
67e2ccce RB |
274 | if (ret) |
275 | return ret; | |
e01402b1 | 276 | |
67e2ccce RB |
277 | if (sp_stopping) |
278 | return 0; | |
279 | } else | |
2600990e RB |
280 | return 0; |
281 | } | |
282 | ||
283 | return (chan->lx_write + chan->buffer_size - chan->lx_read) | |
284 | % chan->buffer_size; | |
e01402b1 RB |
285 | } |
286 | ||
2600990e | 287 | static inline int write_spacefree(int read, int write, int size) |
e01402b1 | 288 | { |
2600990e RB |
289 | if (read == write) { |
290 | /* | |
291 | * Never fill the buffer completely, so indexes are always | |
292 | * equal if empty and only empty, or !equal if data available | |
293 | */ | |
294 | return size - 1; | |
295 | } | |
e01402b1 | 296 | |
2600990e RB |
297 | return ((read + size - write) % size) - 1; |
298 | } | |
e01402b1 | 299 | |
2600990e RB |
300 | unsigned int rtlx_write_poll(int index) |
301 | { | |
302 | struct rtlx_channel *chan = &rtlx->channel[index]; | |
1928cc84 KK |
303 | |
304 | return write_spacefree(chan->rt_read, chan->rt_write, | |
305 | chan->buffer_size); | |
2600990e | 306 | } |
e01402b1 | 307 | |
7f5a7716 | 308 | ssize_t rtlx_read(int index, void __user *buff, size_t count) |
2600990e | 309 | { |
61dcc6f4 | 310 | size_t lx_write, fl = 0L; |
2600990e | 311 | struct rtlx_channel *lx; |
46230aa6 | 312 | unsigned long failed; |
e01402b1 | 313 | |
2600990e RB |
314 | if (rtlx == NULL) |
315 | return -ENOSYS; | |
316 | ||
317 | lx = &rtlx->channel[index]; | |
e01402b1 | 318 | |
bc4809e9 | 319 | mutex_lock(&channel_wqs[index].mutex); |
61dcc6f4 RB |
320 | smp_rmb(); |
321 | lx_write = lx->lx_write; | |
322 | ||
e01402b1 | 323 | /* find out how much in total */ |
afc4841d | 324 | count = min(count, |
61dcc6f4 | 325 | (size_t)(lx_write + lx->buffer_size - lx->lx_read) |
2600990e | 326 | % lx->buffer_size); |
e01402b1 RB |
327 | |
328 | /* then how much from the read pointer onwards */ | |
61dcc6f4 | 329 | fl = min(count, (size_t)lx->buffer_size - lx->lx_read); |
e01402b1 | 330 | |
46230aa6 RB |
331 | failed = copy_to_user(buff, lx->lx_buffer + lx->lx_read, fl); |
332 | if (failed) | |
333 | goto out; | |
e01402b1 RB |
334 | |
335 | /* and if there is anything left at the beginning of the buffer */ | |
61dcc6f4 | 336 | if (count - fl) |
46230aa6 RB |
337 | failed = copy_to_user(buff + fl, lx->lx_buffer, count - fl); |
338 | ||
339 | out: | |
340 | count -= failed; | |
e01402b1 | 341 | |
61dcc6f4 RB |
342 | smp_wmb(); |
343 | lx->lx_read = (lx->lx_read + count) % lx->buffer_size; | |
344 | smp_wmb(); | |
bc4809e9 | 345 | mutex_unlock(&channel_wqs[index].mutex); |
e01402b1 | 346 | |
afc4841d | 347 | return count; |
e01402b1 RB |
348 | } |
349 | ||
7f5a7716 | 350 | ssize_t rtlx_write(int index, const void __user *buffer, size_t count) |
2600990e RB |
351 | { |
352 | struct rtlx_channel *rt; | |
7f5a7716 | 353 | unsigned long failed; |
61dcc6f4 | 354 | size_t rt_read; |
2600990e RB |
355 | size_t fl; |
356 | ||
357 | if (rtlx == NULL) | |
358 | return(-ENOSYS); | |
359 | ||
360 | rt = &rtlx->channel[index]; | |
361 | ||
bc4809e9 | 362 | mutex_lock(&channel_wqs[index].mutex); |
61dcc6f4 RB |
363 | smp_rmb(); |
364 | rt_read = rt->rt_read; | |
365 | ||
2600990e | 366 | /* total number of bytes to copy */ |
1928cc84 KK |
367 | count = min(count, (size_t)write_spacefree(rt_read, rt->rt_write, |
368 | rt->buffer_size)); | |
2600990e RB |
369 | |
370 | /* first bit from write pointer to the end of the buffer, or count */ | |
371 | fl = min(count, (size_t) rt->buffer_size - rt->rt_write); | |
372 | ||
46230aa6 RB |
373 | failed = copy_from_user(rt->rt_buffer + rt->rt_write, buffer, fl); |
374 | if (failed) | |
375 | goto out; | |
2600990e RB |
376 | |
377 | /* if there's any left copy to the beginning of the buffer */ | |
46230aa6 RB |
378 | if (count - fl) { |
379 | failed = copy_from_user(rt->rt_buffer, buffer + fl, count - fl); | |
380 | } | |
381 | ||
382 | out: | |
7f5a7716 | 383 | count -= failed; |
2600990e | 384 | |
61dcc6f4 RB |
385 | smp_wmb(); |
386 | rt->rt_write = (rt->rt_write + count) % rt->buffer_size; | |
387 | smp_wmb(); | |
bc4809e9 | 388 | mutex_unlock(&channel_wqs[index].mutex); |
2600990e | 389 | |
61dcc6f4 | 390 | return count; |
2600990e RB |
391 | } |
392 | ||
393 | ||
394 | static int file_open(struct inode *inode, struct file *filp) | |
395 | { | |
1bbfc20d | 396 | return rtlx_open(iminor(inode), (filp->f_flags & O_NONBLOCK) ? 0 : 1); |
2600990e RB |
397 | } |
398 | ||
399 | static int file_release(struct inode *inode, struct file *filp) | |
400 | { | |
1bbfc20d | 401 | return rtlx_release(iminor(inode)); |
2600990e RB |
402 | } |
403 | ||
404 | static unsigned int file_poll(struct file *file, poll_table * wait) | |
405 | { | |
406 | int minor; | |
407 | unsigned int mask = 0; | |
408 | ||
1b04fe9a | 409 | minor = iminor(file->f_path.dentry->d_inode); |
2600990e RB |
410 | |
411 | poll_wait(file, &channel_wqs[minor].rt_queue, wait); | |
412 | poll_wait(file, &channel_wqs[minor].lx_queue, wait); | |
413 | ||
414 | if (rtlx == NULL) | |
415 | return 0; | |
416 | ||
417 | /* data available to read? */ | |
418 | if (rtlx_read_poll(minor, 0)) | |
419 | mask |= POLLIN | POLLRDNORM; | |
420 | ||
421 | /* space to write */ | |
422 | if (rtlx_write_poll(minor)) | |
423 | mask |= POLLOUT | POLLWRNORM; | |
424 | ||
425 | return mask; | |
426 | } | |
427 | ||
428 | static ssize_t file_read(struct file *file, char __user * buffer, size_t count, | |
429 | loff_t * ppos) | |
430 | { | |
1b04fe9a | 431 | int minor = iminor(file->f_path.dentry->d_inode); |
2600990e RB |
432 | |
433 | /* data available? */ | |
434 | if (!rtlx_read_poll(minor, (file->f_flags & O_NONBLOCK) ? 0 : 1)) { | |
435 | return 0; // -EAGAIN makes cat whinge | |
436 | } | |
437 | ||
46230aa6 | 438 | return rtlx_read(minor, buffer, count); |
2600990e RB |
439 | } |
440 | ||
441 | static ssize_t file_write(struct file *file, const char __user * buffer, | |
e01402b1 RB |
442 | size_t count, loff_t * ppos) |
443 | { | |
444 | int minor; | |
445 | struct rtlx_channel *rt; | |
e01402b1 | 446 | |
1b04fe9a | 447 | minor = iminor(file->f_path.dentry->d_inode); |
e01402b1 RB |
448 | rt = &rtlx->channel[minor]; |
449 | ||
450 | /* any space left... */ | |
2600990e | 451 | if (!rtlx_write_poll(minor)) { |
67e2ccce | 452 | int ret = 0; |
e01402b1 RB |
453 | |
454 | if (file->f_flags & O_NONBLOCK) | |
afc4841d | 455 | return -EAGAIN; |
e01402b1 | 456 | |
67e2ccce RB |
457 | __wait_event_interruptible(channel_wqs[minor].rt_queue, |
458 | rtlx_write_poll(minor), | |
459 | ret); | |
460 | if (ret) | |
461 | return ret; | |
e01402b1 RB |
462 | } |
463 | ||
46230aa6 | 464 | return rtlx_write(minor, buffer, count); |
e01402b1 RB |
465 | } |
466 | ||
5dfe4c96 | 467 | static const struct file_operations rtlx_fops = { |
2600990e RB |
468 | .owner = THIS_MODULE, |
469 | .open = file_open, | |
470 | .release = file_release, | |
471 | .write = file_write, | |
472 | .read = file_read, | |
473 | .poll = file_poll | |
e01402b1 RB |
474 | }; |
475 | ||
2600990e RB |
476 | static struct irqaction rtlx_irq = { |
477 | .handler = rtlx_interrupt, | |
f40298fd | 478 | .flags = IRQF_DISABLED, |
2600990e RB |
479 | .name = "RTLX", |
480 | }; | |
481 | ||
97dcb82d | 482 | static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ; |
2600990e | 483 | |
afc4841d RB |
484 | static char register_chrdev_failed[] __initdata = |
485 | KERN_ERR "rtlx_module_init: unable to register device\n"; | |
486 | ||
9d5a3f5f | 487 | static int __init rtlx_module_init(void) |
e01402b1 | 488 | { |
bb3d7c7f RB |
489 | struct device *dev; |
490 | int i, err; | |
2600990e | 491 | |
07cc0c9e RB |
492 | if (!cpu_has_mipsmt) { |
493 | printk("VPE loader: not a MIPS MT capable processor\n"); | |
494 | return -ENODEV; | |
495 | } | |
496 | ||
497 | if (tclimit == 0) { | |
498 | printk(KERN_WARNING "No TCs reserved for AP/SP, not " | |
499 | "initializing RTLX.\nPass maxtcs=<n> argument as kernel " | |
500 | "argument\n"); | |
501 | ||
502 | return -ENODEV; | |
503 | } | |
504 | ||
afc4841d RB |
505 | major = register_chrdev(0, module_name, &rtlx_fops); |
506 | if (major < 0) { | |
507 | printk(register_chrdev_failed); | |
508 | return major; | |
e01402b1 RB |
509 | } |
510 | ||
2600990e RB |
511 | /* initialise the wait queues */ |
512 | for (i = 0; i < RTLX_CHANNELS; i++) { | |
513 | init_waitqueue_head(&channel_wqs[i].rt_queue); | |
514 | init_waitqueue_head(&channel_wqs[i].lx_queue); | |
c4c4018b | 515 | atomic_set(&channel_wqs[i].in_open, 0); |
bc4809e9 | 516 | mutex_init(&channel_wqs[i].mutex); |
bb3d7c7f | 517 | |
a9b12619 GKH |
518 | dev = device_create(mt_class, NULL, MKDEV(major, i), NULL, |
519 | "%s%d", module_name, i); | |
bb3d7c7f RB |
520 | if (IS_ERR(dev)) { |
521 | err = PTR_ERR(dev); | |
522 | goto out_chrdev; | |
523 | } | |
2600990e RB |
524 | } |
525 | ||
526 | /* set up notifiers */ | |
527 | notify.start = starting; | |
528 | notify.stop = stopping; | |
07cc0c9e | 529 | vpe_notify(tclimit, ¬ify); |
2600990e RB |
530 | |
531 | if (cpu_has_vint) | |
532 | set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch); | |
1928cc84 KK |
533 | else { |
534 | pr_err("APRP RTLX init on non-vectored-interrupt processor\n"); | |
535 | err = -ENODEV; | |
536 | goto out_chrdev; | |
537 | } | |
2600990e RB |
538 | |
539 | rtlx_irq.dev_id = rtlx; | |
540 | setup_irq(rtlx_irq_num, &rtlx_irq); | |
541 | ||
afc4841d | 542 | return 0; |
bb3d7c7f RB |
543 | |
544 | out_chrdev: | |
545 | for (i = 0; i < RTLX_CHANNELS; i++) | |
546 | device_destroy(mt_class, MKDEV(major, i)); | |
547 | ||
548 | return err; | |
e01402b1 RB |
549 | } |
550 | ||
afc4841d | 551 | static void __exit rtlx_module_exit(void) |
e01402b1 | 552 | { |
bb3d7c7f RB |
553 | int i; |
554 | ||
555 | for (i = 0; i < RTLX_CHANNELS; i++) | |
556 | device_destroy(mt_class, MKDEV(major, i)); | |
557 | ||
e01402b1 RB |
558 | unregister_chrdev(major, module_name); |
559 | } | |
560 | ||
561 | module_init(rtlx_module_init); | |
562 | module_exit(rtlx_module_exit); | |
afc4841d | 563 | |
e01402b1 | 564 | MODULE_DESCRIPTION("MIPS RTLX"); |
2600990e | 565 | MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); |
e01402b1 | 566 | MODULE_LICENSE("GPL"); |