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1 | /* | |
2 | * Driver for PC-speaker like devices found on various Sparc systems. | |
3 | * | |
4 | * Copyright (c) 2002 Vojtech Pavlik | |
5 | * Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net) | |
6 | */ | |
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 | ||
16 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); | |
17 | MODULE_DESCRIPTION("Sparc Speaker beeper driver"); | |
18 | MODULE_LICENSE("GPL"); | |
19 | ||
20 | struct grover_beep_info { | |
21 | void __iomem *freq_regs; | |
22 | void __iomem *enable_reg; | |
23 | }; | |
24 | ||
25 | struct bbc_beep_info { | |
26 | u32 clock_freq; | |
27 | void __iomem *regs; | |
28 | }; | |
29 | ||
30 | struct 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 | ||
41 | static 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 | ||
65 | static 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 | ||
103 | static 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 | /* enable counter 2 */ | |
126 | outb(inb(info->enable_reg) | 3, info->enable_reg); | |
127 | /* set command for counter 2, 2 byte write */ | |
128 | outb(0xB6, info->freq_regs + 1); | |
129 | /* select desired HZ */ | |
130 | outb(count & 0xff, info->freq_regs + 0); | |
131 | outb((count >> 8) & 0xff, info->freq_regs + 0); | |
132 | } else { | |
133 | /* disable counter 2 */ | |
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 | ||
142 | static int __devinit 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 | ||
176 | static int sparcspkr_shutdown(struct of_device *dev) | |
177 | { | |
178 | struct sparcspkr_state *state = dev_get_drvdata(&dev->dev); | |
179 | struct input_dev *input_dev = state->input_dev; | |
180 | ||
181 | /* turn off the speaker */ | |
182 | state->event(input_dev, EV_SND, SND_BELL, 0); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static int __devinit bbc_beep_probe(struct of_device *op, const struct of_device_id *match) | |
188 | { | |
189 | struct sparcspkr_state *state; | |
190 | struct bbc_beep_info *info; | |
191 | struct device_node *dp; | |
192 | int err = -ENOMEM; | |
193 | ||
194 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
195 | if (!state) | |
196 | goto out_err; | |
197 | ||
198 | state->name = "Sparc BBC Speaker"; | |
199 | state->event = bbc_spkr_event; | |
200 | spin_lock_init(&state->lock); | |
201 | ||
202 | dp = of_find_node_by_path("/"); | |
203 | err = -ENODEV; | |
204 | if (!dp) | |
205 | goto out_free; | |
206 | ||
207 | info = &state->u.bbc; | |
208 | info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0); | |
209 | if (!info->clock_freq) | |
210 | goto out_free; | |
211 | ||
212 | info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep"); | |
213 | if (!info->regs) | |
214 | goto out_free; | |
215 | ||
216 | dev_set_drvdata(&op->dev, state); | |
217 | ||
218 | err = sparcspkr_probe(&op->dev); | |
219 | if (err) | |
220 | goto out_clear_drvdata; | |
221 | ||
222 | return 0; | |
223 | ||
224 | out_clear_drvdata: | |
225 | dev_set_drvdata(&op->dev, NULL); | |
226 | of_iounmap(&op->resource[0], info->regs, 6); | |
227 | ||
228 | out_free: | |
229 | kfree(state); | |
230 | out_err: | |
231 | return err; | |
232 | } | |
233 | ||
234 | static int __devexit bbc_remove(struct of_device *op) | |
235 | { | |
236 | struct sparcspkr_state *state = dev_get_drvdata(&op->dev); | |
237 | struct input_dev *input_dev = state->input_dev; | |
238 | struct bbc_beep_info *info = &state->u.bbc; | |
239 | ||
240 | /* turn off the speaker */ | |
241 | state->event(input_dev, EV_SND, SND_BELL, 0); | |
242 | ||
243 | input_unregister_device(input_dev); | |
244 | ||
245 | of_iounmap(&op->resource[0], info->regs, 6); | |
246 | ||
247 | dev_set_drvdata(&op->dev, NULL); | |
248 | kfree(state); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static const struct of_device_id bbc_beep_match[] = { | |
254 | { | |
255 | .name = "beep", | |
256 | .compatible = "SUNW,bbc-beep", | |
257 | }, | |
258 | {}, | |
259 | }; | |
260 | ||
261 | static struct of_platform_driver bbc_beep_driver = { | |
262 | .name = "bbcbeep", | |
263 | .match_table = bbc_beep_match, | |
264 | .probe = bbc_beep_probe, | |
265 | .remove = __devexit_p(bbc_remove), | |
266 | .shutdown = sparcspkr_shutdown, | |
267 | }; | |
268 | ||
269 | static int __devinit grover_beep_probe(struct of_device *op, const struct of_device_id *match) | |
270 | { | |
271 | struct sparcspkr_state *state; | |
272 | struct grover_beep_info *info; | |
273 | int err = -ENOMEM; | |
274 | ||
275 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
276 | if (!state) | |
277 | goto out_err; | |
278 | ||
279 | state->name = "Sparc Grover Speaker"; | |
280 | state->event = grover_spkr_event; | |
281 | spin_lock_init(&state->lock); | |
282 | ||
283 | info = &state->u.grover; | |
284 | info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq"); | |
285 | if (!info->freq_regs) | |
286 | goto out_free; | |
287 | ||
288 | info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable"); | |
289 | if (!info->enable_reg) | |
290 | goto out_unmap_freq_regs; | |
291 | ||
292 | dev_set_drvdata(&op->dev, state); | |
293 | ||
294 | err = sparcspkr_probe(&op->dev); | |
295 | if (err) | |
296 | goto out_clear_drvdata; | |
297 | ||
298 | return 0; | |
299 | ||
300 | out_clear_drvdata: | |
301 | dev_set_drvdata(&op->dev, NULL); | |
302 | of_iounmap(&op->resource[3], info->enable_reg, 1); | |
303 | ||
304 | out_unmap_freq_regs: | |
305 | of_iounmap(&op->resource[2], info->freq_regs, 2); | |
306 | out_free: | |
307 | kfree(state); | |
308 | out_err: | |
309 | return err; | |
310 | } | |
311 | ||
312 | static int __devexit grover_remove(struct of_device *op) | |
313 | { | |
314 | struct sparcspkr_state *state = dev_get_drvdata(&op->dev); | |
315 | struct grover_beep_info *info = &state->u.grover; | |
316 | struct input_dev *input_dev = state->input_dev; | |
317 | ||
318 | /* turn off the speaker */ | |
319 | state->event(input_dev, EV_SND, SND_BELL, 0); | |
320 | ||
321 | input_unregister_device(input_dev); | |
322 | ||
323 | of_iounmap(&op->resource[3], info->enable_reg, 1); | |
324 | of_iounmap(&op->resource[2], info->freq_regs, 2); | |
325 | ||
326 | dev_set_drvdata(&op->dev, NULL); | |
327 | kfree(state); | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | static const struct of_device_id grover_beep_match[] = { | |
333 | { | |
334 | .name = "beep", | |
335 | .compatible = "SUNW,smbus-beep", | |
336 | }, | |
337 | {}, | |
338 | }; | |
339 | ||
340 | static struct of_platform_driver grover_beep_driver = { | |
341 | .name = "groverbeep", | |
342 | .match_table = grover_beep_match, | |
343 | .probe = grover_beep_probe, | |
344 | .remove = __devexit_p(grover_remove), | |
345 | .shutdown = sparcspkr_shutdown, | |
346 | }; | |
347 | ||
348 | static int __init sparcspkr_init(void) | |
349 | { | |
350 | int err = of_register_driver(&bbc_beep_driver, | |
351 | &of_platform_bus_type); | |
352 | ||
353 | if (!err) { | |
354 | err = of_register_driver(&grover_beep_driver, | |
355 | &of_platform_bus_type); | |
356 | if (err) | |
357 | of_unregister_driver(&bbc_beep_driver); | |
358 | } | |
359 | ||
360 | return err; | |
361 | } | |
362 | ||
363 | static void __exit sparcspkr_exit(void) | |
364 | { | |
365 | of_unregister_driver(&bbc_beep_driver); | |
366 | of_unregister_driver(&grover_beep_driver); | |
367 | } | |
368 | ||
369 | module_init(sparcspkr_init); | |
370 | module_exit(sparcspkr_exit); |