Commit | Line | Data |
---|---|---|
1da177e4 LT |
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> | |
1da177e4 LT |
36 | #include <linux/smp_lock.h> |
37 | #include <linux/device.h> | |
38 | ||
39 | #include <asm/atarihw.h> | |
40 | #include <asm/traps.h> | |
41 | #include <asm/uaccess.h> /* For put_user and get_user */ | |
42 | ||
43 | #include <asm/dsp56k.h> | |
44 | ||
45 | /* minor devices */ | |
46 | #define DSP56K_DEV_56001 0 /* The only device so far */ | |
47 | ||
48 | #define TIMEOUT 10 /* Host port timeout in number of tries */ | |
49 | #define MAXIO 2048 /* Maximum number of words before sleep */ | |
50 | #define DSP56K_MAX_BINARY_LENGTH (3*64*1024) | |
51 | ||
52 | #define DSP56K_TX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_TREQ | |
53 | #define DSP56K_RX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_RREQ | |
54 | #define DSP56K_TX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_TREQ | |
55 | #define DSP56K_RX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_RREQ | |
56 | ||
57 | #define DSP56K_TRANSMIT (dsp56k_host_interface.isr & DSP56K_ISR_TXDE) | |
58 | #define DSP56K_RECEIVE (dsp56k_host_interface.isr & DSP56K_ISR_RXDF) | |
59 | ||
60 | #define handshake(count, maxio, timeout, ENABLE, f) \ | |
61 | { \ | |
62 | long i, t, m; \ | |
63 | while (count > 0) { \ | |
64 | m = min_t(unsigned long, count, maxio); \ | |
65 | for (i = 0; i < m; i++) { \ | |
66 | for (t = 0; t < timeout && !ENABLE; t++) \ | |
67 | msleep(20); \ | |
68 | if(!ENABLE) \ | |
69 | return -EIO; \ | |
70 | f; \ | |
71 | } \ | |
72 | count -= m; \ | |
73 | if (m == maxio) msleep(20); \ | |
74 | } \ | |
75 | } | |
76 | ||
77 | #define tx_wait(n) \ | |
78 | { \ | |
79 | int t; \ | |
80 | for(t = 0; t < n && !DSP56K_TRANSMIT; t++) \ | |
81 | msleep(10); \ | |
82 | if(!DSP56K_TRANSMIT) { \ | |
83 | return -EIO; \ | |
84 | } \ | |
85 | } | |
86 | ||
87 | #define rx_wait(n) \ | |
88 | { \ | |
89 | int t; \ | |
90 | for(t = 0; t < n && !DSP56K_RECEIVE; t++) \ | |
91 | msleep(10); \ | |
92 | if(!DSP56K_RECEIVE) { \ | |
93 | return -EIO; \ | |
94 | } \ | |
95 | } | |
96 | ||
97 | /* DSP56001 bootstrap code */ | |
98 | static char bootstrap[] = { | |
99 | 0x0c, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
100 | 0x00, 0x00, 0x00, 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, 0x60, 0xf4, 0x00, 0x00, 0x00, 0x4f, 0x61, 0xf4, | |
119 | 0x00, 0x00, 0x7e, 0xa9, 0x06, 0x2e, 0x80, 0x00, 0x00, 0x47, | |
120 | 0x07, 0xd8, 0x84, 0x07, 0x59, 0x84, 0x08, 0xf4, 0xa8, 0x00, | |
121 | 0x00, 0x04, 0x08, 0xf4, 0xbf, 0x00, 0x0c, 0x00, 0x00, 0xfe, | |
122 | 0xb8, 0x0a, 0xf0, 0x80, 0x00, 0x7e, 0xa9, 0x08, 0xf4, 0xa0, | |
123 | 0x00, 0x00, 0x01, 0x08, 0xf4, 0xbe, 0x00, 0x00, 0x00, 0x0a, | |
124 | 0xa9, 0x80, 0x00, 0x7e, 0xad, 0x08, 0x4e, 0x2b, 0x44, 0xf4, | |
125 | 0x00, 0x00, 0x00, 0x03, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x01, | |
126 | 0x0e, 0xa0, 0x00, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb5, 0x08, | |
127 | 0x50, 0x2b, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb8, 0x08, 0x46, | |
128 | 0x2b, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x02, 0x0a, 0xf0, 0xaa, | |
129 | 0x00, 0x7e, 0xc9, 0x20, 0x00, 0x45, 0x0a, 0xf0, 0xaa, 0x00, | |
130 | 0x7e, 0xd0, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xc6, 0x0a, 0xa9, | |
131 | 0x80, 0x00, 0x7e, 0xc4, 0x08, 0x58, 0x6b, 0x0a, 0xf0, 0x80, | |
132 | 0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xcd, 0x0a, | |
133 | 0xa9, 0x80, 0x00, 0x7e, 0xcb, 0x08, 0x58, 0xab, 0x0a, 0xf0, | |
134 | 0x80, 0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xd4, | |
135 | 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xd2, 0x08, 0x58, 0xeb, 0x0a, | |
136 | 0xf0, 0x80, 0x00, 0x7e, 0xad}; | |
137 | static int sizeof_bootstrap = 375; | |
138 | ||
139 | ||
140 | static struct dsp56k_device { | |
141 | long in_use; | |
142 | long maxio, timeout; | |
143 | int tx_wsize, rx_wsize; | |
144 | } dsp56k; | |
145 | ||
ca8eca68 | 146 | static struct class *dsp56k_class; |
1da177e4 LT |
147 | |
148 | static int dsp56k_reset(void) | |
149 | { | |
150 | u_char status; | |
151 | ||
152 | /* Power down the DSP */ | |
153 | sound_ym.rd_data_reg_sel = 14; | |
154 | status = sound_ym.rd_data_reg_sel & 0xef; | |
155 | sound_ym.wd_data = status; | |
156 | sound_ym.wd_data = status | 0x10; | |
157 | ||
158 | udelay(10); | |
159 | ||
160 | /* Power up the DSP */ | |
161 | sound_ym.rd_data_reg_sel = 14; | |
162 | sound_ym.wd_data = sound_ym.rd_data_reg_sel & 0xef; | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
d85f6891 | 167 | static int dsp56k_upload(u_char __user *bin, int len) |
1da177e4 LT |
168 | { |
169 | int i; | |
170 | u_char *p; | |
171 | ||
172 | dsp56k_reset(); | |
173 | ||
174 | p = bootstrap; | |
175 | for (i = 0; i < sizeof_bootstrap/3; i++) { | |
176 | /* tx_wait(10); */ | |
177 | dsp56k_host_interface.data.b[1] = *p++; | |
178 | dsp56k_host_interface.data.b[2] = *p++; | |
179 | dsp56k_host_interface.data.b[3] = *p++; | |
180 | } | |
181 | for (; i < 512; i++) { | |
182 | /* tx_wait(10); */ | |
183 | dsp56k_host_interface.data.b[1] = 0; | |
184 | dsp56k_host_interface.data.b[2] = 0; | |
185 | dsp56k_host_interface.data.b[3] = 0; | |
186 | } | |
187 | ||
188 | for (i = 0; i < len; i++) { | |
189 | tx_wait(10); | |
190 | get_user(dsp56k_host_interface.data.b[1], bin++); | |
191 | get_user(dsp56k_host_interface.data.b[2], bin++); | |
192 | get_user(dsp56k_host_interface.data.b[3], bin++); | |
193 | } | |
194 | ||
195 | tx_wait(10); | |
196 | dsp56k_host_interface.data.l = 3; /* Magic execute */ | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
d85f6891 | 201 | static ssize_t dsp56k_read(struct file *file, char __user *buf, size_t count, |
1da177e4 LT |
202 | loff_t *ppos) |
203 | { | |
204 | struct inode *inode = file->f_dentry->d_inode; | |
205 | int dev = iminor(inode) & 0x0f; | |
206 | ||
207 | switch(dev) | |
208 | { | |
209 | case DSP56K_DEV_56001: | |
210 | { | |
211 | ||
212 | long n; | |
213 | ||
214 | /* Don't do anything if nothing is to be done */ | |
215 | if (!count) return 0; | |
216 | ||
217 | n = 0; | |
218 | switch (dsp56k.rx_wsize) { | |
219 | case 1: /* 8 bit */ | |
220 | { | |
221 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, | |
222 | put_user(dsp56k_host_interface.data.b[3], buf+n++)); | |
223 | return n; | |
224 | } | |
225 | case 2: /* 16 bit */ | |
226 | { | |
d85f6891 | 227 | short __user *data; |
1da177e4 LT |
228 | |
229 | count /= 2; | |
d85f6891 | 230 | data = (short __user *) buf; |
1da177e4 LT |
231 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
232 | put_user(dsp56k_host_interface.data.w[1], data+n++)); | |
233 | return 2*n; | |
234 | } | |
235 | case 3: /* 24 bit */ | |
236 | { | |
237 | count /= 3; | |
238 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, | |
239 | put_user(dsp56k_host_interface.data.b[1], buf+n++); | |
240 | put_user(dsp56k_host_interface.data.b[2], buf+n++); | |
241 | put_user(dsp56k_host_interface.data.b[3], buf+n++)); | |
242 | return 3*n; | |
243 | } | |
244 | case 4: /* 32 bit */ | |
245 | { | |
d85f6891 | 246 | long __user *data; |
1da177e4 LT |
247 | |
248 | count /= 4; | |
d85f6891 | 249 | data = (long __user *) buf; |
1da177e4 LT |
250 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
251 | put_user(dsp56k_host_interface.data.l, data+n++)); | |
252 | return 4*n; | |
253 | } | |
254 | } | |
255 | return -EFAULT; | |
256 | } | |
257 | ||
258 | default: | |
259 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); | |
260 | return -ENXIO; | |
261 | } | |
262 | } | |
263 | ||
d85f6891 | 264 | static ssize_t dsp56k_write(struct file *file, const char __user *buf, size_t count, |
1da177e4 LT |
265 | loff_t *ppos) |
266 | { | |
267 | struct inode *inode = file->f_dentry->d_inode; | |
268 | int dev = iminor(inode) & 0x0f; | |
269 | ||
270 | switch(dev) | |
271 | { | |
272 | case DSP56K_DEV_56001: | |
273 | { | |
274 | long n; | |
275 | ||
276 | /* Don't do anything if nothing is to be done */ | |
277 | if (!count) return 0; | |
278 | ||
279 | n = 0; | |
280 | switch (dsp56k.tx_wsize) { | |
281 | case 1: /* 8 bit */ | |
282 | { | |
283 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, | |
284 | get_user(dsp56k_host_interface.data.b[3], buf+n++)); | |
285 | return n; | |
286 | } | |
287 | case 2: /* 16 bit */ | |
288 | { | |
d85f6891 | 289 | const short __user *data; |
1da177e4 LT |
290 | |
291 | count /= 2; | |
d85f6891 | 292 | data = (const short __user *)buf; |
1da177e4 LT |
293 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
294 | get_user(dsp56k_host_interface.data.w[1], data+n++)); | |
295 | return 2*n; | |
296 | } | |
297 | case 3: /* 24 bit */ | |
298 | { | |
299 | count /= 3; | |
300 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, | |
301 | get_user(dsp56k_host_interface.data.b[1], buf+n++); | |
302 | get_user(dsp56k_host_interface.data.b[2], buf+n++); | |
303 | get_user(dsp56k_host_interface.data.b[3], buf+n++)); | |
304 | return 3*n; | |
305 | } | |
306 | case 4: /* 32 bit */ | |
307 | { | |
d85f6891 | 308 | const long __user *data; |
1da177e4 LT |
309 | |
310 | count /= 4; | |
d85f6891 | 311 | data = (const long __user *)buf; |
1da177e4 LT |
312 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
313 | get_user(dsp56k_host_interface.data.l, data+n++)); | |
314 | return 4*n; | |
315 | } | |
316 | } | |
317 | ||
318 | return -EFAULT; | |
319 | } | |
320 | default: | |
321 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); | |
322 | return -ENXIO; | |
323 | } | |
324 | } | |
325 | ||
326 | static int dsp56k_ioctl(struct inode *inode, struct file *file, | |
327 | unsigned int cmd, unsigned long arg) | |
328 | { | |
329 | int dev = iminor(inode) & 0x0f; | |
d85f6891 | 330 | void __user *argp = (void __user *)arg; |
1da177e4 LT |
331 | |
332 | switch(dev) | |
333 | { | |
334 | case DSP56K_DEV_56001: | |
335 | ||
336 | switch(cmd) { | |
337 | case DSP56K_UPLOAD: | |
338 | { | |
d85f6891 | 339 | char __user *bin; |
1da177e4 | 340 | int r, len; |
d85f6891 | 341 | struct dsp56k_upload __user *binary = argp; |
1da177e4 LT |
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; | |
d85f6891 | 375 | struct dsp56k_host_flags __user *hf = argp; |
1da177e4 LT |
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 | } | |
ca8eca68 | 513 | dsp56k_class = class_create(THIS_MODULE, "dsp56k"); |
1da177e4 LT |
514 | if (IS_ERR(dsp56k_class)) { |
515 | err = PTR_ERR(dsp56k_class); | |
516 | goto out_chrdev; | |
517 | } | |
53f46542 | 518 | class_device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k"); |
1da177e4 | 519 | |
1da177e4 LT |
520 | printk(banner); |
521 | goto out; | |
522 | ||
1da177e4 LT |
523 | out_chrdev: |
524 | unregister_chrdev(DSP56K_MAJOR, "dsp56k"); | |
525 | out: | |
526 | return err; | |
527 | } | |
528 | module_init(dsp56k_init_driver); | |
529 | ||
530 | static void __exit dsp56k_cleanup_driver(void) | |
531 | { | |
ca8eca68 | 532 | class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0)); |
533 | class_destroy(dsp56k_class); | |
1da177e4 | 534 | unregister_chrdev(DSP56K_MAJOR, "dsp56k"); |
1da177e4 LT |
535 | } |
536 | module_exit(dsp56k_cleanup_driver); | |
537 | ||
538 | MODULE_LICENSE("GPL"); |