1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
|
/*
* Driver for PC-speaker like devices found on various Sparc systems.
*
* Copyright (c) 2002 Vojtech Pavlik
* Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net)
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <asm/io.h>
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_DESCRIPTION("Sparc Speaker beeper driver");
MODULE_LICENSE("GPL");
struct grover_beep_info {
void __iomem *freq_regs;
void __iomem *enable_reg;
};
struct bbc_beep_info {
u32 clock_freq;
void __iomem *regs;
};
struct sparcspkr_state {
const char *name;
int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
spinlock_t lock;
struct input_dev *input_dev;
union {
struct grover_beep_info grover;
struct bbc_beep_info bbc;
} u;
};
static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
{
u32 val, clock_freq = info->clock_freq;
int i;
if (!count)
return 0;
if (count <= clock_freq >> 20)
return 1 << 18;
if (count >= clock_freq >> 12)
return 1 << 10;
val = 1 << 18;
for (i = 19; i >= 11; i--) {
val >>= 1;
if (count <= clock_freq >> i)
break;
}
return val;
}
static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
struct bbc_beep_info *info = &state->u.bbc;
unsigned int count = 0;
unsigned long flags;
if (type != EV_SND)
return -1;
switch (code) {
case SND_BELL: if (value) value = 1000;
case SND_TONE: break;
default: return -1;
}
if (value > 20 && value < 32767)
count = 1193182 / value;
count = bbc_count_to_reg(info, count);
spin_lock_irqsave(&state->lock, flags);
if (count) {
outb(0x01, info->regs + 0);
outb(0x00, info->regs + 2);
outb((count >> 16) & 0xff, info->regs + 3);
outb((count >> 8) & 0xff, info->regs + 4);
outb(0x00, info->regs + 5);
} else {
outb(0x00, info->regs + 0);
}
spin_unlock_irqrestore(&state->lock, flags);
return 0;
}
static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
struct grover_beep_info *info = &state->u.grover;
unsigned int count = 0;
unsigned long flags;
if (type != EV_SND)
return -1;
switch (code) {
case SND_BELL: if (value) value = 1000;
case SND_TONE: break;
default: return -1;
}
if (value > 20 && value < 32767)
count = 1193182 / value;
spin_lock_irqsave(&state->lock, flags);
if (count) {
/* enable counter 2 */
outb(inb(info->enable_reg) | 3, info->enable_reg);
/* set command for counter 2, 2 byte write */
outb(0xB6, info->freq_regs + 1);
/* select desired HZ */
outb(count & 0xff, info->freq_regs + 0);
outb((count >> 8) & 0xff, info->freq_regs + 0);
} else {
/* disable counter 2 */
outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg);
}
spin_unlock_irqrestore(&state->lock, flags);
return 0;
}
static int __devinit sparcspkr_probe(struct device *dev)
{
struct sparcspkr_state *state = dev_get_drvdata(dev);
struct input_dev *input_dev;
int error;
input_dev = input_allocate_device();
if (!input_dev)
return -ENOMEM;
input_dev->name = state->name;
input_dev->phys = "sparc/input0";
input_dev->id.bustype = BUS_ISA;
input_dev->id.vendor = 0x001f;
input_dev->id.product = 0x0001;
input_dev->id.version = 0x0100;
input_dev->dev.parent = dev;
input_dev->evbit[0] = BIT_MASK(EV_SND);
input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
input_dev->event = state->event;
error = input_register_device(input_dev);
if (error) {
input_free_device(input_dev);
return error;
}
state->input_dev = input_dev;
return 0;
}
static int sparcspkr_shutdown(struct platform_device *dev)
{
struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
struct input_dev *input_dev = state->input_dev;
/* turn off the speaker */
state->event(input_dev, EV_SND, SND_BELL, 0);
return 0;
}
static int __devinit bbc_beep_probe(struct platform_device *op, const struct of_device_id *match)
{
struct sparcspkr_state *state;
struct bbc_beep_info *info;
struct device_node *dp;
int err = -ENOMEM;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
goto out_err;
state->name = "Sparc BBC Speaker";
state->event = bbc_spkr_event;
spin_lock_init(&state->lock);
dp = of_find_node_by_path("/");
err = -ENODEV;
if (!dp)
goto out_free;
info = &state->u.bbc;
info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
if (!info->clock_freq)
goto out_free;
info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
if (!info->regs)
goto out_free;
dev_set_drvdata(&op->dev, state);
err = sparcspkr_probe(&op->dev);
if (err)
goto out_clear_drvdata;
return 0;
out_clear_drvdata:
dev_set_drvdata(&op->dev, NULL);
of_iounmap(&op->resource[0], info->regs, 6);
out_free:
kfree(state);
out_err:
return err;
}
static int __devexit bbc_remove(struct platform_device *op)
{
struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
struct input_dev *input_dev = state->input_dev;
struct bbc_beep_info *info = &state->u.bbc;
/* turn off the speaker */
state->event(input_dev, EV_SND, SND_BELL, 0);
input_unregister_device(input_dev);
of_iounmap(&op->resource[0], info->regs, 6);
dev_set_drvdata(&op->dev, NULL);
kfree(state);
return 0;
}
static const struct of_device_id bbc_beep_match[] = {
{
.name = "beep",
.compatible = "SUNW,bbc-beep",
},
{},
};
static struct of_platform_driver bbc_beep_driver = {
.driver = {
.name = "bbcbeep",
.owner = THIS_MODULE,
.of_match_table = bbc_beep_match,
},
.probe = bbc_beep_probe,
.remove = __devexit_p(bbc_remove),
.shutdown = sparcspkr_shutdown,
};
static int __devinit grover_beep_probe(struct platform_device *op, const struct of_device_id *match)
{
struct sparcspkr_state *state;
struct grover_beep_info *info;
int err = -ENOMEM;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
goto out_err;
state->name = "Sparc Grover Speaker";
state->event = grover_spkr_event;
spin_lock_init(&state->lock);
info = &state->u.grover;
info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
if (!info->freq_regs)
goto out_free;
info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
if (!info->enable_reg)
goto out_unmap_freq_regs;
dev_set_drvdata(&op->dev, state);
err = sparcspkr_probe(&op->dev);
if (err)
goto out_clear_drvdata;
return 0;
out_clear_drvdata:
dev_set_drvdata(&op->dev, NULL);
of_iounmap(&op->resource[3], info->enable_reg, 1);
out_unmap_freq_regs:
of_iounmap(&op->resource[2], info->freq_regs, 2);
out_free:
kfree(state);
out_err:
return err;
}
static int __devexit grover_remove(struct platform_device *op)
{
struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
struct grover_beep_info *info = &state->u.grover;
struct input_dev *input_dev = state->input_dev;
/* turn off the speaker */
state->event(input_dev, EV_SND, SND_BELL, 0);
input_unregister_device(input_dev);
of_iounmap(&op->resource[3], info->enable_reg, 1);
of_iounmap(&op->resource[2], info->freq_regs, 2);
dev_set_drvdata(&op->dev, NULL);
kfree(state);
return 0;
}
static const struct of_device_id grover_beep_match[] = {
{
.name = "beep",
.compatible = "SUNW,smbus-beep",
},
{},
};
static struct of_platform_driver grover_beep_driver = {
.driver = {
.name = "groverbeep",
.owner = THIS_MODULE,
.of_match_table = grover_beep_match,
},
.probe = grover_beep_probe,
.remove = __devexit_p(grover_remove),
.shutdown = sparcspkr_shutdown,
};
static int __init sparcspkr_init(void)
{
int err = of_register_platform_driver(&bbc_beep_driver);
if (!err) {
err = of_register_platform_driver(&grover_beep_driver);
if (err)
of_unregister_platform_driver(&bbc_beep_driver);
}
return err;
}
static void __exit sparcspkr_exit(void)
{
of_unregister_platform_driver(&bbc_beep_driver);
of_unregister_platform_driver(&grover_beep_driver);
}
module_init(sparcspkr_init);
module_exit(sparcspkr_exit);
|
