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