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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 | 21 | #include <linux/kernel.h> |
e01402b1 RB |
22 | #include <linux/fs.h> |
23 | #include <linux/init.h> | |
2600990e | 24 | #include <asm/uaccess.h> |
2600990e RB |
25 | #include <linux/list.h> |
26 | #include <linux/vmalloc.h> | |
27 | #include <linux/elf.h> | |
28 | #include <linux/seq_file.h> | |
29 | #include <linux/syscalls.h> | |
30 | #include <linux/moduleloader.h> | |
a84c96e2 | 31 | #include <linux/interrupt.h> |
e01402b1 RB |
32 | #include <linux/poll.h> |
33 | #include <linux/sched.h> | |
34 | #include <linux/wait.h> | |
35 | #include <asm/mipsmtregs.h> | |
bb3d7c7f | 36 | #include <asm/mips_mt.h> |
2600990e | 37 | #include <asm/cacheflush.h> |
60063497 | 38 | #include <linux/atomic.h> |
e01402b1 RB |
39 | #include <asm/cpu.h> |
40 | #include <asm/processor.h> | |
2600990e | 41 | #include <asm/vpe.h> |
e01402b1 RB |
42 | #include <asm/rtlx.h> |
43 | ||
afc4841d | 44 | static struct rtlx_info *rtlx; |
e01402b1 RB |
45 | static int major; |
46 | static char module_name[] = "rtlx"; | |
e01402b1 RB |
47 | |
48 | static struct chan_waitqueues { | |
49 | wait_queue_head_t rt_queue; | |
50 | wait_queue_head_t lx_queue; | |
c4c4018b | 51 | atomic_t in_open; |
bc4809e9 | 52 | struct mutex mutex; |
e01402b1 RB |
53 | } channel_wqs[RTLX_CHANNELS]; |
54 | ||
2600990e | 55 | static struct vpe_notifications notify; |
982f6ffe | 56 | static int sp_stopping; |
2600990e | 57 | |
e01402b1 RB |
58 | extern void *vpe_get_shared(int index); |
59 | ||
937a8015 | 60 | static void rtlx_dispatch(void) |
e01402b1 | 61 | { |
97dcb82d | 62 | do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ); |
e01402b1 RB |
63 | } |
64 | ||
2600990e RB |
65 | |
66 | /* Interrupt handler may be called before rtlx_init has otherwise had | |
67 | a chance to run. | |
68 | */ | |
937a8015 | 69 | static irqreturn_t rtlx_interrupt(int irq, void *dev_id) |
e01402b1 | 70 | { |
1bbfc20d RB |
71 | unsigned int vpeflags; |
72 | unsigned long flags; | |
e01402b1 | 73 | int i; |
1928cc84 KK |
74 | |
75 | /* Ought not to be strictly necessary for SMTC builds */ | |
76 | local_irq_save(flags); | |
77 | vpeflags = dvpe(); | |
78 | set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ); | |
79 | irq_enable_hazard(); | |
80 | evpe(vpeflags); | |
81 | local_irq_restore(flags); | |
e01402b1 RB |
82 | |
83 | for (i = 0; i < RTLX_CHANNELS; i++) { | |
2600990e RB |
84 | wake_up(&channel_wqs[i].lx_queue); |
85 | wake_up(&channel_wqs[i].rt_queue); | |
e01402b1 RB |
86 | } |
87 | ||
afc4841d | 88 | return IRQ_HANDLED; |
e01402b1 RB |
89 | } |
90 | ||
f5dbeaf5 | 91 | static void __used dump_rtlx(void) |
e01402b1 RB |
92 | { |
93 | int i; | |
94 | ||
2600990e | 95 | printk("id 0x%lx state %d\n", rtlx->id, rtlx->state); |
e01402b1 | 96 | |
e01402b1 | 97 | for (i = 0; i < RTLX_CHANNELS; i++) { |
2600990e | 98 | struct rtlx_channel *chan = &rtlx->channel[i]; |
e01402b1 | 99 | |
2600990e RB |
100 | printk(" rt_state %d lx_state %d buffer_size %d\n", |
101 | chan->rt_state, chan->lx_state, chan->buffer_size); | |
e01402b1 | 102 | |
2600990e RB |
103 | printk(" rt_read %d rt_write %d\n", |
104 | chan->rt_read, chan->rt_write); | |
e01402b1 | 105 | |
2600990e RB |
106 | printk(" lx_read %d lx_write %d\n", |
107 | chan->lx_read, chan->lx_write); | |
108 | ||
109 | printk(" rt_buffer <%s>\n", chan->rt_buffer); | |
110 | printk(" lx_buffer <%s>\n", chan->lx_buffer); | |
111 | } | |
112 | } | |
113 | ||
114 | /* call when we have the address of the shared structure from the SP side. */ | |
115 | static int rtlx_init(struct rtlx_info *rtlxi) | |
116 | { | |
117 | if (rtlxi->id != RTLX_ID) { | |
1928cc84 KK |
118 | printk(KERN_ERR "no valid RTLX id at 0x%p 0x%lx\n", |
119 | rtlxi, rtlxi->id); | |
2600990e RB |
120 | return -ENOEXEC; |
121 | } | |
e01402b1 RB |
122 | |
123 | rtlx = rtlxi; | |
afc4841d RB |
124 | |
125 | return 0; | |
e01402b1 RB |
126 | } |
127 | ||
2600990e RB |
128 | /* notifications */ |
129 | static void starting(int vpe) | |
e01402b1 | 130 | { |
2600990e RB |
131 | int i; |
132 | sp_stopping = 0; | |
133 | ||
134 | /* force a reload of rtlx */ | |
135 | rtlx=NULL; | |
136 | ||
137 | /* wake up any sleeping rtlx_open's */ | |
138 | for (i = 0; i < RTLX_CHANNELS; i++) | |
139 | wake_up_interruptible(&channel_wqs[i].lx_queue); | |
140 | } | |
141 | ||
142 | static void stopping(int vpe) | |
143 | { | |
144 | int i; | |
145 | ||
146 | sp_stopping = 1; | |
147 | for (i = 0; i < RTLX_CHANNELS; i++) | |
148 | wake_up_interruptible(&channel_wqs[i].lx_queue); | |
149 | } | |
150 | ||
151 | ||
152 | int rtlx_open(int index, int can_sleep) | |
153 | { | |
9e346820 | 154 | struct rtlx_info **p; |
67e2ccce | 155 | struct rtlx_channel *chan; |
c4c4018b | 156 | enum rtlx_state state; |
67e2ccce | 157 | int ret = 0; |
e01402b1 | 158 | |
2600990e RB |
159 | if (index >= RTLX_CHANNELS) { |
160 | printk(KERN_DEBUG "rtlx_open index out of range\n"); | |
161 | return -ENOSYS; | |
162 | } | |
163 | ||
c4c4018b RB |
164 | if (atomic_inc_return(&channel_wqs[index].in_open) > 1) { |
165 | printk(KERN_DEBUG "rtlx_open channel %d already opened\n", | |
166 | index); | |
167 | ret = -EBUSY; | |
168 | goto out_fail; | |
2600990e RB |
169 | } |
170 | ||
e01402b1 | 171 | if (rtlx == NULL) { |
07cc0c9e | 172 | if( (p = vpe_get_shared(tclimit)) == NULL) { |
1928cc84 KK |
173 | if (can_sleep) { |
174 | __wait_event_interruptible(channel_wqs[index].lx_queue, | |
175 | (p = vpe_get_shared(tclimit)), ret); | |
176 | if (ret) | |
67e2ccce | 177 | goto out_fail; |
1928cc84 KK |
178 | } else { |
179 | printk(KERN_DEBUG "No SP program loaded, and device " | |
180 | "opened with O_NONBLOCK\n"); | |
181 | ret = -ENOSYS; | |
182 | goto out_fail; | |
183 | } | |
e01402b1 RB |
184 | } |
185 | ||
9e346820 | 186 | smp_rmb(); |
e01402b1 | 187 | if (*p == NULL) { |
2600990e | 188 | if (can_sleep) { |
9e346820 RB |
189 | DEFINE_WAIT(wait); |
190 | ||
191 | for (;;) { | |
1928cc84 KK |
192 | prepare_to_wait( |
193 | &channel_wqs[index].lx_queue, | |
194 | &wait, TASK_INTERRUPTIBLE); | |
9e346820 RB |
195 | smp_rmb(); |
196 | if (*p != NULL) | |
197 | break; | |
198 | if (!signal_pending(current)) { | |
199 | schedule(); | |
200 | continue; | |
201 | } | |
202 | ret = -ERESTARTSYS; | |
67e2ccce | 203 | goto out_fail; |
9e346820 RB |
204 | } |
205 | finish_wait(&channel_wqs[index].lx_queue, &wait); | |
67e2ccce | 206 | } else { |
1928cc84 | 207 | pr_err(" *vpe_get_shared is NULL. " |
2600990e | 208 | "Has an SP program been loaded?\n"); |
67e2ccce RB |
209 | ret = -ENOSYS; |
210 | goto out_fail; | |
2600990e RB |
211 | } |
212 | } | |
213 | ||
214 | if ((unsigned int)*p < KSEG0) { | |
1928cc84 KK |
215 | printk(KERN_WARNING "vpe_get_shared returned an " |
216 | "invalid pointer maybe an error code %d\n", | |
217 | (int)*p); | |
67e2ccce RB |
218 | ret = -ENOSYS; |
219 | goto out_fail; | |
e01402b1 RB |
220 | } |
221 | ||
c4c4018b RB |
222 | if ((ret = rtlx_init(*p)) < 0) |
223 | goto out_ret; | |
e01402b1 RB |
224 | } |
225 | ||
2600990e | 226 | chan = &rtlx->channel[index]; |
e01402b1 | 227 | |
c4c4018b RB |
228 | state = xchg(&chan->lx_state, RTLX_STATE_OPENED); |
229 | if (state == RTLX_STATE_OPENED) { | |
230 | ret = -EBUSY; | |
231 | goto out_fail; | |
232 | } | |
67e2ccce RB |
233 | |
234 | out_fail: | |
c4c4018b RB |
235 | smp_mb(); |
236 | atomic_dec(&channel_wqs[index].in_open); | |
237 | smp_mb(); | |
67e2ccce | 238 | |
c4c4018b | 239 | out_ret: |
67e2ccce | 240 | return ret; |
e01402b1 RB |
241 | } |
242 | ||
2600990e | 243 | int rtlx_release(int index) |
e01402b1 | 244 | { |
1928cc84 KK |
245 | if (rtlx == NULL) { |
246 | pr_err("rtlx_release() with null rtlx\n"); | |
247 | return 0; | |
248 | } | |
2600990e | 249 | rtlx->channel[index].lx_state = RTLX_STATE_UNUSED; |
afc4841d | 250 | return 0; |
e01402b1 RB |
251 | } |
252 | ||
2600990e | 253 | unsigned int rtlx_read_poll(int index, int can_sleep) |
e01402b1 | 254 | { |
2600990e | 255 | struct rtlx_channel *chan; |
e01402b1 | 256 | |
2600990e RB |
257 | if (rtlx == NULL) |
258 | return 0; | |
e01402b1 | 259 | |
2600990e | 260 | chan = &rtlx->channel[index]; |
e01402b1 RB |
261 | |
262 | /* data available to read? */ | |
2600990e RB |
263 | if (chan->lx_read == chan->lx_write) { |
264 | if (can_sleep) { | |
67e2ccce | 265 | int ret = 0; |
e01402b1 | 266 | |
67e2ccce | 267 | __wait_event_interruptible(channel_wqs[index].lx_queue, |
1928cc84 KK |
268 | (chan->lx_read != chan->lx_write) || |
269 | sp_stopping, ret); | |
67e2ccce RB |
270 | if (ret) |
271 | return ret; | |
e01402b1 | 272 | |
67e2ccce RB |
273 | if (sp_stopping) |
274 | return 0; | |
275 | } else | |
2600990e RB |
276 | return 0; |
277 | } | |
278 | ||
279 | return (chan->lx_write + chan->buffer_size - chan->lx_read) | |
280 | % chan->buffer_size; | |
e01402b1 RB |
281 | } |
282 | ||
2600990e | 283 | static inline int write_spacefree(int read, int write, int size) |
e01402b1 | 284 | { |
2600990e RB |
285 | if (read == write) { |
286 | /* | |
287 | * Never fill the buffer completely, so indexes are always | |
288 | * equal if empty and only empty, or !equal if data available | |
289 | */ | |
290 | return size - 1; | |
291 | } | |
e01402b1 | 292 | |
2600990e RB |
293 | return ((read + size - write) % size) - 1; |
294 | } | |
e01402b1 | 295 | |
2600990e RB |
296 | unsigned int rtlx_write_poll(int index) |
297 | { | |
298 | struct rtlx_channel *chan = &rtlx->channel[index]; | |
1928cc84 KK |
299 | |
300 | return write_spacefree(chan->rt_read, chan->rt_write, | |
301 | chan->buffer_size); | |
2600990e | 302 | } |
e01402b1 | 303 | |
7f5a7716 | 304 | ssize_t rtlx_read(int index, void __user *buff, size_t count) |
2600990e | 305 | { |
61dcc6f4 | 306 | size_t lx_write, fl = 0L; |
2600990e | 307 | struct rtlx_channel *lx; |
46230aa6 | 308 | unsigned long failed; |
e01402b1 | 309 | |
2600990e RB |
310 | if (rtlx == NULL) |
311 | return -ENOSYS; | |
312 | ||
313 | lx = &rtlx->channel[index]; | |
e01402b1 | 314 | |
bc4809e9 | 315 | mutex_lock(&channel_wqs[index].mutex); |
61dcc6f4 RB |
316 | smp_rmb(); |
317 | lx_write = lx->lx_write; | |
318 | ||
e01402b1 | 319 | /* find out how much in total */ |
afc4841d | 320 | count = min(count, |
61dcc6f4 | 321 | (size_t)(lx_write + lx->buffer_size - lx->lx_read) |
2600990e | 322 | % lx->buffer_size); |
e01402b1 RB |
323 | |
324 | /* then how much from the read pointer onwards */ | |
61dcc6f4 | 325 | fl = min(count, (size_t)lx->buffer_size - lx->lx_read); |
e01402b1 | 326 | |
46230aa6 RB |
327 | failed = copy_to_user(buff, lx->lx_buffer + lx->lx_read, fl); |
328 | if (failed) | |
329 | goto out; | |
e01402b1 RB |
330 | |
331 | /* and if there is anything left at the beginning of the buffer */ | |
61dcc6f4 | 332 | if (count - fl) |
46230aa6 RB |
333 | failed = copy_to_user(buff + fl, lx->lx_buffer, count - fl); |
334 | ||
335 | out: | |
336 | count -= failed; | |
e01402b1 | 337 | |
61dcc6f4 RB |
338 | smp_wmb(); |
339 | lx->lx_read = (lx->lx_read + count) % lx->buffer_size; | |
340 | smp_wmb(); | |
bc4809e9 | 341 | mutex_unlock(&channel_wqs[index].mutex); |
e01402b1 | 342 | |
afc4841d | 343 | return count; |
e01402b1 RB |
344 | } |
345 | ||
7f5a7716 | 346 | ssize_t rtlx_write(int index, const void __user *buffer, size_t count) |
2600990e RB |
347 | { |
348 | struct rtlx_channel *rt; | |
7f5a7716 | 349 | unsigned long failed; |
61dcc6f4 | 350 | size_t rt_read; |
2600990e RB |
351 | size_t fl; |
352 | ||
353 | if (rtlx == NULL) | |
354 | return(-ENOSYS); | |
355 | ||
356 | rt = &rtlx->channel[index]; | |
357 | ||
bc4809e9 | 358 | mutex_lock(&channel_wqs[index].mutex); |
61dcc6f4 RB |
359 | smp_rmb(); |
360 | rt_read = rt->rt_read; | |
361 | ||
2600990e | 362 | /* total number of bytes to copy */ |
1928cc84 KK |
363 | count = min(count, (size_t)write_spacefree(rt_read, rt->rt_write, |
364 | rt->buffer_size)); | |
2600990e RB |
365 | |
366 | /* first bit from write pointer to the end of the buffer, or count */ | |
367 | fl = min(count, (size_t) rt->buffer_size - rt->rt_write); | |
368 | ||
46230aa6 RB |
369 | failed = copy_from_user(rt->rt_buffer + rt->rt_write, buffer, fl); |
370 | if (failed) | |
371 | goto out; | |
2600990e RB |
372 | |
373 | /* if there's any left copy to the beginning of the buffer */ | |
46230aa6 RB |
374 | if (count - fl) { |
375 | failed = copy_from_user(rt->rt_buffer, buffer + fl, count - fl); | |
376 | } | |
377 | ||
378 | out: | |
7f5a7716 | 379 | count -= failed; |
2600990e | 380 | |
61dcc6f4 RB |
381 | smp_wmb(); |
382 | rt->rt_write = (rt->rt_write + count) % rt->buffer_size; | |
383 | smp_wmb(); | |
bc4809e9 | 384 | mutex_unlock(&channel_wqs[index].mutex); |
2600990e | 385 | |
61dcc6f4 | 386 | return count; |
2600990e RB |
387 | } |
388 | ||
389 | ||
390 | static int file_open(struct inode *inode, struct file *filp) | |
391 | { | |
1bbfc20d | 392 | return rtlx_open(iminor(inode), (filp->f_flags & O_NONBLOCK) ? 0 : 1); |
2600990e RB |
393 | } |
394 | ||
395 | static int file_release(struct inode *inode, struct file *filp) | |
396 | { | |
1bbfc20d | 397 | return rtlx_release(iminor(inode)); |
2600990e RB |
398 | } |
399 | ||
400 | static unsigned int file_poll(struct file *file, poll_table * wait) | |
401 | { | |
402 | int minor; | |
403 | unsigned int mask = 0; | |
404 | ||
1b04fe9a | 405 | minor = iminor(file->f_path.dentry->d_inode); |
2600990e RB |
406 | |
407 | poll_wait(file, &channel_wqs[minor].rt_queue, wait); | |
408 | poll_wait(file, &channel_wqs[minor].lx_queue, wait); | |
409 | ||
410 | if (rtlx == NULL) | |
411 | return 0; | |
412 | ||
413 | /* data available to read? */ | |
414 | if (rtlx_read_poll(minor, 0)) | |
415 | mask |= POLLIN | POLLRDNORM; | |
416 | ||
417 | /* space to write */ | |
418 | if (rtlx_write_poll(minor)) | |
419 | mask |= POLLOUT | POLLWRNORM; | |
420 | ||
421 | return mask; | |
422 | } | |
423 | ||
424 | static ssize_t file_read(struct file *file, char __user * buffer, size_t count, | |
425 | loff_t * ppos) | |
426 | { | |
1b04fe9a | 427 | int minor = iminor(file->f_path.dentry->d_inode); |
2600990e RB |
428 | |
429 | /* data available? */ | |
430 | if (!rtlx_read_poll(minor, (file->f_flags & O_NONBLOCK) ? 0 : 1)) { | |
431 | return 0; // -EAGAIN makes cat whinge | |
432 | } | |
433 | ||
46230aa6 | 434 | return rtlx_read(minor, buffer, count); |
2600990e RB |
435 | } |
436 | ||
437 | static ssize_t file_write(struct file *file, const char __user * buffer, | |
e01402b1 RB |
438 | size_t count, loff_t * ppos) |
439 | { | |
440 | int minor; | |
441 | struct rtlx_channel *rt; | |
e01402b1 | 442 | |
1b04fe9a | 443 | minor = iminor(file->f_path.dentry->d_inode); |
e01402b1 RB |
444 | rt = &rtlx->channel[minor]; |
445 | ||
446 | /* any space left... */ | |
2600990e | 447 | if (!rtlx_write_poll(minor)) { |
67e2ccce | 448 | int ret = 0; |
e01402b1 RB |
449 | |
450 | if (file->f_flags & O_NONBLOCK) | |
afc4841d | 451 | return -EAGAIN; |
e01402b1 | 452 | |
67e2ccce RB |
453 | __wait_event_interruptible(channel_wqs[minor].rt_queue, |
454 | rtlx_write_poll(minor), | |
455 | ret); | |
456 | if (ret) | |
457 | return ret; | |
e01402b1 RB |
458 | } |
459 | ||
46230aa6 | 460 | return rtlx_write(minor, buffer, count); |
e01402b1 RB |
461 | } |
462 | ||
5dfe4c96 | 463 | static const struct file_operations rtlx_fops = { |
2600990e RB |
464 | .owner = THIS_MODULE, |
465 | .open = file_open, | |
466 | .release = file_release, | |
467 | .write = file_write, | |
468 | .read = file_read, | |
6038f373 AB |
469 | .poll = file_poll, |
470 | .llseek = noop_llseek, | |
e01402b1 RB |
471 | }; |
472 | ||
2600990e RB |
473 | static struct irqaction rtlx_irq = { |
474 | .handler = rtlx_interrupt, | |
2600990e RB |
475 | .name = "RTLX", |
476 | }; | |
477 | ||
97dcb82d | 478 | static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ; |
2600990e | 479 | |
afc4841d RB |
480 | static char register_chrdev_failed[] __initdata = |
481 | KERN_ERR "rtlx_module_init: unable to register device\n"; | |
482 | ||
9d5a3f5f | 483 | static int __init rtlx_module_init(void) |
e01402b1 | 484 | { |
bb3d7c7f RB |
485 | struct device *dev; |
486 | int i, err; | |
2600990e | 487 | |
07cc0c9e RB |
488 | if (!cpu_has_mipsmt) { |
489 | printk("VPE loader: not a MIPS MT capable processor\n"); | |
490 | return -ENODEV; | |
491 | } | |
492 | ||
493 | if (tclimit == 0) { | |
494 | printk(KERN_WARNING "No TCs reserved for AP/SP, not " | |
495 | "initializing RTLX.\nPass maxtcs=<n> argument as kernel " | |
496 | "argument\n"); | |
497 | ||
498 | return -ENODEV; | |
499 | } | |
500 | ||
afc4841d RB |
501 | major = register_chrdev(0, module_name, &rtlx_fops); |
502 | if (major < 0) { | |
503 | printk(register_chrdev_failed); | |
504 | return major; | |
e01402b1 RB |
505 | } |
506 | ||
2600990e RB |
507 | /* initialise the wait queues */ |
508 | for (i = 0; i < RTLX_CHANNELS; i++) { | |
509 | init_waitqueue_head(&channel_wqs[i].rt_queue); | |
510 | init_waitqueue_head(&channel_wqs[i].lx_queue); | |
c4c4018b | 511 | atomic_set(&channel_wqs[i].in_open, 0); |
bc4809e9 | 512 | mutex_init(&channel_wqs[i].mutex); |
bb3d7c7f | 513 | |
a9b12619 GKH |
514 | dev = device_create(mt_class, NULL, MKDEV(major, i), NULL, |
515 | "%s%d", module_name, i); | |
bb3d7c7f RB |
516 | if (IS_ERR(dev)) { |
517 | err = PTR_ERR(dev); | |
518 | goto out_chrdev; | |
519 | } | |
2600990e RB |
520 | } |
521 | ||
522 | /* set up notifiers */ | |
523 | notify.start = starting; | |
524 | notify.stop = stopping; | |
07cc0c9e | 525 | vpe_notify(tclimit, ¬ify); |
2600990e RB |
526 | |
527 | if (cpu_has_vint) | |
528 | set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch); | |
1928cc84 KK |
529 | else { |
530 | pr_err("APRP RTLX init on non-vectored-interrupt processor\n"); | |
531 | err = -ENODEV; | |
532 | goto out_chrdev; | |
533 | } | |
2600990e RB |
534 | |
535 | rtlx_irq.dev_id = rtlx; | |
536 | setup_irq(rtlx_irq_num, &rtlx_irq); | |
537 | ||
afc4841d | 538 | return 0; |
bb3d7c7f RB |
539 | |
540 | out_chrdev: | |
541 | for (i = 0; i < RTLX_CHANNELS; i++) | |
542 | device_destroy(mt_class, MKDEV(major, i)); | |
543 | ||
544 | return err; | |
e01402b1 RB |
545 | } |
546 | ||
afc4841d | 547 | static void __exit rtlx_module_exit(void) |
e01402b1 | 548 | { |
bb3d7c7f RB |
549 | int i; |
550 | ||
551 | for (i = 0; i < RTLX_CHANNELS; i++) | |
552 | device_destroy(mt_class, MKDEV(major, i)); | |
553 | ||
e01402b1 RB |
554 | unregister_chrdev(major, module_name); |
555 | } | |
556 | ||
557 | module_init(rtlx_module_init); | |
558 | module_exit(rtlx_module_exit); | |
afc4841d | 559 | |
e01402b1 | 560 | MODULE_DESCRIPTION("MIPS RTLX"); |
2600990e | 561 | MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); |
e01402b1 | 562 | MODULE_LICENSE("GPL"); |