Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/drivers/char/dsp56k.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 13984 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /* |
2 | * The DSP56001 Device Driver, saviour of the Free World(tm) |
3 | * |
4 | * Authors: Fredrik Noring <noring@nocrew.org> |
5 | * lars brinkhoff <lars@nocrew.org> |
6 | * Tomas Berndtsson <tomas@nocrew.org> |
7 | * |
8 | * First version May 1996 |
9 | * |
10 | * History: |
11 | * 97-01-29 Tomas Berndtsson, |
12 | * Integrated with Linux 2.1.21 kernel sources. |
13 | * 97-02-15 Tomas Berndtsson, |
14 | * Fixed for kernel 2.1.26 |
15 | * |
16 | * BUGS: |
17 | * Hmm... there must be something here :) |
18 | * |
19 | * Copyright (C) 1996,1997 Fredrik Noring, lars brinkhoff & Tomas Berndtsson |
20 | * |
21 | * This file is subject to the terms and conditions of the GNU General Public |
22 | * License. See the file COPYING in the main directory of this archive |
23 | * for more details. |
24 | */ |
25 | |
26 | #include <linux/module.h> |
27 | #include <linux/slab.h> /* for kmalloc() and kfree() */ |
28 | #include <linux/sched.h> /* for struct wait_queue etc */ |
29 | #include <linux/major.h> |
30 | #include <linux/types.h> |
31 | #include <linux/errno.h> |
32 | #include <linux/delay.h> /* guess what */ |
33 | #include <linux/fs.h> |
34 | #include <linux/mm.h> |
35 | #include <linux/init.h> |
36 | #include <linux/devfs_fs_kernel.h> |
37 | #include <linux/smp_lock.h> |
38 | #include <linux/device.h> |
39 | |
40 | #include <asm/atarihw.h> |
41 | #include <asm/traps.h> |
42 | #include <asm/uaccess.h> /* For put_user and get_user */ |
43 | |
44 | #include <asm/dsp56k.h> |
45 | |
46 | /* minor devices */ |
47 | #define DSP56K_DEV_56001 0 /* The only device so far */ |
48 | |
49 | #define TIMEOUT 10 /* Host port timeout in number of tries */ |
50 | #define MAXIO 2048 /* Maximum number of words before sleep */ |
51 | #define DSP56K_MAX_BINARY_LENGTH (3*64*1024) |
52 | |
53 | #define DSP56K_TX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_TREQ |
54 | #define DSP56K_RX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_RREQ |
55 | #define DSP56K_TX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_TREQ |
56 | #define DSP56K_RX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_RREQ |
57 | |
58 | #define DSP56K_TRANSMIT (dsp56k_host_interface.isr & DSP56K_ISR_TXDE) |
59 | #define DSP56K_RECEIVE (dsp56k_host_interface.isr & DSP56K_ISR_RXDF) |
60 | |
61 | #define handshake(count, maxio, timeout, ENABLE, f) \ |
62 | { \ |
63 | long i, t, m; \ |
64 | while (count > 0) { \ |
65 | m = min_t(unsigned long, count, maxio); \ |
66 | for (i = 0; i < m; i++) { \ |
67 | for (t = 0; t < timeout && !ENABLE; t++) \ |
68 | msleep(20); \ |
69 | if(!ENABLE) \ |
70 | return -EIO; \ |
71 | f; \ |
72 | } \ |
73 | count -= m; \ |
74 | if (m == maxio) msleep(20); \ |
75 | } \ |
76 | } |
77 | |
78 | #define tx_wait(n) \ |
79 | { \ |
80 | int t; \ |
81 | for(t = 0; t < n && !DSP56K_TRANSMIT; t++) \ |
82 | msleep(10); \ |
83 | if(!DSP56K_TRANSMIT) { \ |
84 | return -EIO; \ |
85 | } \ |
86 | } |
87 | |
88 | #define rx_wait(n) \ |
89 | { \ |
90 | int t; \ |
91 | for(t = 0; t < n && !DSP56K_RECEIVE; t++) \ |
92 | msleep(10); \ |
93 | if(!DSP56K_RECEIVE) { \ |
94 | return -EIO; \ |
95 | } \ |
96 | } |
97 | |
98 | /* DSP56001 bootstrap code */ |
99 | static char bootstrap[] = { |
100 | 0x0c, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
101 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
102 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
103 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
104 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
105 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
106 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
107 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
108 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
109 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
110 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
111 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
112 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
113 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
114 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
115 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
116 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
117 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
118 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
119 | 0x00, 0x00, 0x60, 0xf4, 0x00, 0x00, 0x00, 0x4f, 0x61, 0xf4, |
120 | 0x00, 0x00, 0x7e, 0xa9, 0x06, 0x2e, 0x80, 0x00, 0x00, 0x47, |
121 | 0x07, 0xd8, 0x84, 0x07, 0x59, 0x84, 0x08, 0xf4, 0xa8, 0x00, |
122 | 0x00, 0x04, 0x08, 0xf4, 0xbf, 0x00, 0x0c, 0x00, 0x00, 0xfe, |
123 | 0xb8, 0x0a, 0xf0, 0x80, 0x00, 0x7e, 0xa9, 0x08, 0xf4, 0xa0, |
124 | 0x00, 0x00, 0x01, 0x08, 0xf4, 0xbe, 0x00, 0x00, 0x00, 0x0a, |
125 | 0xa9, 0x80, 0x00, 0x7e, 0xad, 0x08, 0x4e, 0x2b, 0x44, 0xf4, |
126 | 0x00, 0x00, 0x00, 0x03, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x01, |
127 | 0x0e, 0xa0, 0x00, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb5, 0x08, |
128 | 0x50, 0x2b, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb8, 0x08, 0x46, |
129 | 0x2b, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x02, 0x0a, 0xf0, 0xaa, |
130 | 0x00, 0x7e, 0xc9, 0x20, 0x00, 0x45, 0x0a, 0xf0, 0xaa, 0x00, |
131 | 0x7e, 0xd0, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xc6, 0x0a, 0xa9, |
132 | 0x80, 0x00, 0x7e, 0xc4, 0x08, 0x58, 0x6b, 0x0a, 0xf0, 0x80, |
133 | 0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xcd, 0x0a, |
134 | 0xa9, 0x80, 0x00, 0x7e, 0xcb, 0x08, 0x58, 0xab, 0x0a, 0xf0, |
135 | 0x80, 0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xd4, |
136 | 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xd2, 0x08, 0x58, 0xeb, 0x0a, |
137 | 0xf0, 0x80, 0x00, 0x7e, 0xad}; |
138 | static int sizeof_bootstrap = 375; |
139 | |
140 | |
141 | static struct dsp56k_device { |
142 | long in_use; |
143 | long maxio, timeout; |
144 | int tx_wsize, rx_wsize; |
145 | } dsp56k; |
146 | |
147 | static struct class_simple *dsp56k_class; |
148 | |
149 | static int dsp56k_reset(void) |
150 | { |
151 | u_char status; |
152 | |
153 | /* Power down the DSP */ |
154 | sound_ym.rd_data_reg_sel = 14; |
155 | status = sound_ym.rd_data_reg_sel & 0xef; |
156 | sound_ym.wd_data = status; |
157 | sound_ym.wd_data = status | 0x10; |
158 | |
159 | udelay(10); |
160 | |
161 | /* Power up the DSP */ |
162 | sound_ym.rd_data_reg_sel = 14; |
163 | sound_ym.wd_data = sound_ym.rd_data_reg_sel & 0xef; |
164 | |
165 | return 0; |
166 | } |
167 | |
168 | static int dsp56k_upload(u_char *bin, int len) |
169 | { |
170 | int i; |
171 | u_char *p; |
172 | |
173 | dsp56k_reset(); |
174 | |
175 | p = bootstrap; |
176 | for (i = 0; i < sizeof_bootstrap/3; i++) { |
177 | /* tx_wait(10); */ |
178 | dsp56k_host_interface.data.b[1] = *p++; |
179 | dsp56k_host_interface.data.b[2] = *p++; |
180 | dsp56k_host_interface.data.b[3] = *p++; |
181 | } |
182 | for (; i < 512; i++) { |
183 | /* tx_wait(10); */ |
184 | dsp56k_host_interface.data.b[1] = 0; |
185 | dsp56k_host_interface.data.b[2] = 0; |
186 | dsp56k_host_interface.data.b[3] = 0; |
187 | } |
188 | |
189 | for (i = 0; i < len; i++) { |
190 | tx_wait(10); |
191 | get_user(dsp56k_host_interface.data.b[1], bin++); |
192 | get_user(dsp56k_host_interface.data.b[2], bin++); |
193 | get_user(dsp56k_host_interface.data.b[3], bin++); |
194 | } |
195 | |
196 | tx_wait(10); |
197 | dsp56k_host_interface.data.l = 3; /* Magic execute */ |
198 | |
199 | return 0; |
200 | } |
201 | |
202 | static ssize_t dsp56k_read(struct file *file, char *buf, size_t count, |
203 | loff_t *ppos) |
204 | { |
205 | struct inode *inode = file->f_dentry->d_inode; |
206 | int dev = iminor(inode) & 0x0f; |
207 | |
208 | switch(dev) |
209 | { |
210 | case DSP56K_DEV_56001: |
211 | { |
212 | |
213 | long n; |
214 | |
215 | /* Don't do anything if nothing is to be done */ |
216 | if (!count) return 0; |
217 | |
218 | n = 0; |
219 | switch (dsp56k.rx_wsize) { |
220 | case 1: /* 8 bit */ |
221 | { |
222 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
223 | put_user(dsp56k_host_interface.data.b[3], buf+n++)); |
224 | return n; |
225 | } |
226 | case 2: /* 16 bit */ |
227 | { |
228 | short *data; |
229 | |
230 | count /= 2; |
231 | data = (short*) buf; |
232 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
233 | put_user(dsp56k_host_interface.data.w[1], data+n++)); |
234 | return 2*n; |
235 | } |
236 | case 3: /* 24 bit */ |
237 | { |
238 | count /= 3; |
239 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
240 | put_user(dsp56k_host_interface.data.b[1], buf+n++); |
241 | put_user(dsp56k_host_interface.data.b[2], buf+n++); |
242 | put_user(dsp56k_host_interface.data.b[3], buf+n++)); |
243 | return 3*n; |
244 | } |
245 | case 4: /* 32 bit */ |
246 | { |
247 | long *data; |
248 | |
249 | count /= 4; |
250 | data = (long*) buf; |
251 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
252 | put_user(dsp56k_host_interface.data.l, data+n++)); |
253 | return 4*n; |
254 | } |
255 | } |
256 | return -EFAULT; |
257 | } |
258 | |
259 | default: |
260 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
261 | return -ENXIO; |
262 | } |
263 | } |
264 | |
265 | static ssize_t dsp56k_write(struct file *file, const char *buf, size_t count, |
266 | loff_t *ppos) |
267 | { |
268 | struct inode *inode = file->f_dentry->d_inode; |
269 | int dev = iminor(inode) & 0x0f; |
270 | |
271 | switch(dev) |
272 | { |
273 | case DSP56K_DEV_56001: |
274 | { |
275 | long n; |
276 | |
277 | /* Don't do anything if nothing is to be done */ |
278 | if (!count) return 0; |
279 | |
280 | n = 0; |
281 | switch (dsp56k.tx_wsize) { |
282 | case 1: /* 8 bit */ |
283 | { |
284 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
285 | get_user(dsp56k_host_interface.data.b[3], buf+n++)); |
286 | return n; |
287 | } |
288 | case 2: /* 16 bit */ |
289 | { |
290 | const short *data; |
291 | |
292 | count /= 2; |
293 | data = (const short *)buf; |
294 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
295 | get_user(dsp56k_host_interface.data.w[1], data+n++)); |
296 | return 2*n; |
297 | } |
298 | case 3: /* 24 bit */ |
299 | { |
300 | count /= 3; |
301 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
302 | get_user(dsp56k_host_interface.data.b[1], buf+n++); |
303 | get_user(dsp56k_host_interface.data.b[2], buf+n++); |
304 | get_user(dsp56k_host_interface.data.b[3], buf+n++)); |
305 | return 3*n; |
306 | } |
307 | case 4: /* 32 bit */ |
308 | { |
309 | const long *data; |
310 | |
311 | count /= 4; |
312 | data = (const long *)buf; |
313 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
314 | get_user(dsp56k_host_interface.data.l, data+n++)); |
315 | return 4*n; |
316 | } |
317 | } |
318 | |
319 | return -EFAULT; |
320 | } |
321 | default: |
322 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
323 | return -ENXIO; |
324 | } |
325 | } |
326 | |
327 | static int dsp56k_ioctl(struct inode *inode, struct file *file, |
328 | unsigned int cmd, unsigned long arg) |
329 | { |
330 | int dev = iminor(inode) & 0x0f; |
331 | |
332 | switch(dev) |
333 | { |
334 | case DSP56K_DEV_56001: |
335 | |
336 | switch(cmd) { |
337 | case DSP56K_UPLOAD: |
338 | { |
339 | char *bin; |
340 | int r, len; |
341 | struct dsp56k_upload *binary = (struct dsp56k_upload *) arg; |
342 | |
343 | if(get_user(len, &binary->len) < 0) |
344 | return -EFAULT; |
345 | if(get_user(bin, &binary->bin) < 0) |
346 | return -EFAULT; |
347 | |
348 | if (len == 0) { |
349 | return -EINVAL; /* nothing to upload?!? */ |
350 | } |
351 | if (len > DSP56K_MAX_BINARY_LENGTH) { |
352 | return -EINVAL; |
353 | } |
354 | |
355 | r = dsp56k_upload(bin, len); |
356 | if (r < 0) { |
357 | return r; |
358 | } |
359 | |
360 | break; |
361 | } |
362 | case DSP56K_SET_TX_WSIZE: |
363 | if (arg > 4 || arg < 1) |
364 | return -EINVAL; |
365 | dsp56k.tx_wsize = (int) arg; |
366 | break; |
367 | case DSP56K_SET_RX_WSIZE: |
368 | if (arg > 4 || arg < 1) |
369 | return -EINVAL; |
370 | dsp56k.rx_wsize = (int) arg; |
371 | break; |
372 | case DSP56K_HOST_FLAGS: |
373 | { |
374 | int dir, out, status; |
375 | struct dsp56k_host_flags *hf = (struct dsp56k_host_flags*) arg; |
376 | |
377 | if(get_user(dir, &hf->dir) < 0) |
378 | return -EFAULT; |
379 | if(get_user(out, &hf->out) < 0) |
380 | return -EFAULT; |
381 | |
382 | if ((dir & 0x1) && (out & 0x1)) |
383 | dsp56k_host_interface.icr |= DSP56K_ICR_HF0; |
384 | else if (dir & 0x1) |
385 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0; |
386 | if ((dir & 0x2) && (out & 0x2)) |
387 | dsp56k_host_interface.icr |= DSP56K_ICR_HF1; |
388 | else if (dir & 0x2) |
389 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1; |
390 | |
391 | status = 0; |
392 | if (dsp56k_host_interface.icr & DSP56K_ICR_HF0) status |= 0x1; |
393 | if (dsp56k_host_interface.icr & DSP56K_ICR_HF1) status |= 0x2; |
394 | if (dsp56k_host_interface.isr & DSP56K_ISR_HF2) status |= 0x4; |
395 | if (dsp56k_host_interface.isr & DSP56K_ISR_HF3) status |= 0x8; |
396 | |
397 | return put_user(status, &hf->status); |
398 | } |
399 | case DSP56K_HOST_CMD: |
400 | if (arg > 31 || arg < 0) |
401 | return -EINVAL; |
402 | dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) | |
403 | DSP56K_CVR_HC); |
404 | break; |
405 | default: |
406 | return -EINVAL; |
407 | } |
408 | return 0; |
409 | |
410 | default: |
411 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
412 | return -ENXIO; |
413 | } |
414 | } |
415 | |
416 | /* As of 2.1.26 this should be dsp56k_poll, |
417 | * but how do I then check device minor number? |
418 | * Do I need this function at all??? |
419 | */ |
420 | #if 0 |
421 | static unsigned int dsp56k_poll(struct file *file, poll_table *wait) |
422 | { |
423 | int dev = iminor(file->f_dentry->d_inode) & 0x0f; |
424 | |
425 | switch(dev) |
426 | { |
427 | case DSP56K_DEV_56001: |
428 | /* poll_wait(file, ???, wait); */ |
429 | return POLLIN | POLLRDNORM | POLLOUT; |
430 | |
431 | default: |
432 | printk("DSP56k driver: Unknown minor device: %d\n", dev); |
433 | return 0; |
434 | } |
435 | } |
436 | #endif |
437 | |
438 | static int dsp56k_open(struct inode *inode, struct file *file) |
439 | { |
440 | int dev = iminor(inode) & 0x0f; |
441 | |
442 | switch(dev) |
443 | { |
444 | case DSP56K_DEV_56001: |
445 | |
446 | if (test_and_set_bit(0, &dsp56k.in_use)) |
447 | return -EBUSY; |
448 | |
449 | dsp56k.timeout = TIMEOUT; |
450 | dsp56k.maxio = MAXIO; |
451 | dsp56k.rx_wsize = dsp56k.tx_wsize = 4; |
452 | |
453 | DSP56K_TX_INT_OFF; |
454 | DSP56K_RX_INT_OFF; |
455 | |
456 | /* Zero host flags */ |
457 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0; |
458 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1; |
459 | |
460 | break; |
461 | |
462 | default: |
463 | return -ENODEV; |
464 | } |
465 | |
466 | return 0; |
467 | } |
468 | |
469 | static int dsp56k_release(struct inode *inode, struct file *file) |
470 | { |
471 | int dev = iminor(inode) & 0x0f; |
472 | |
473 | switch(dev) |
474 | { |
475 | case DSP56K_DEV_56001: |
476 | clear_bit(0, &dsp56k.in_use); |
477 | break; |
478 | default: |
479 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
480 | return -ENXIO; |
481 | } |
482 | |
483 | return 0; |
484 | } |
485 | |
486 | static struct file_operations dsp56k_fops = { |
487 | .owner = THIS_MODULE, |
488 | .read = dsp56k_read, |
489 | .write = dsp56k_write, |
490 | .ioctl = dsp56k_ioctl, |
491 | .open = dsp56k_open, |
492 | .release = dsp56k_release, |
493 | }; |
494 | |
495 | |
496 | /****** Init and module functions ******/ |
497 | |
498 | static char banner[] __initdata = KERN_INFO "DSP56k driver installed\n"; |
499 | |
500 | static int __init dsp56k_init_driver(void) |
501 | { |
502 | int err = 0; |
503 | |
504 | if(!MACH_IS_ATARI || !ATARIHW_PRESENT(DSP56K)) { |
505 | printk("DSP56k driver: Hardware not present\n"); |
506 | return -ENODEV; |
507 | } |
508 | |
509 | if(register_chrdev(DSP56K_MAJOR, "dsp56k", &dsp56k_fops)) { |
510 | printk("DSP56k driver: Unable to register driver\n"); |
511 | return -ENODEV; |
512 | } |
513 | dsp56k_class = class_simple_create(THIS_MODULE, "dsp56k"); |
514 | if (IS_ERR(dsp56k_class)) { |
515 | err = PTR_ERR(dsp56k_class); |
516 | goto out_chrdev; |
517 | } |
518 | class_simple_device_add(dsp56k_class, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k"); |
519 | |
520 | err = devfs_mk_cdev(MKDEV(DSP56K_MAJOR, 0), |
521 | S_IFCHR | S_IRUSR | S_IWUSR, "dsp56k"); |
522 | if(err) |
523 | goto out_class; |
524 | |
525 | printk(banner); |
526 | goto out; |
527 | |
528 | out_class: |
529 | class_simple_device_remove(MKDEV(DSP56K_MAJOR, 0)); |
530 | class_simple_destroy(dsp56k_class); |
531 | out_chrdev: |
532 | unregister_chrdev(DSP56K_MAJOR, "dsp56k"); |
533 | out: |
534 | return err; |
535 | } |
536 | module_init(dsp56k_init_driver); |
537 | |
538 | static void __exit dsp56k_cleanup_driver(void) |
539 | { |
540 | class_simple_device_remove(MKDEV(DSP56K_MAJOR, 0)); |
541 | class_simple_destroy(dsp56k_class); |
542 | unregister_chrdev(DSP56K_MAJOR, "dsp56k"); |
543 | devfs_remove("dsp56k"); |
544 | } |
545 | module_exit(dsp56k_cleanup_driver); |
546 | |
547 | MODULE_LICENSE("GPL"); |