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[pohmelfs.git] / drivers / input / misc / sparcspkr.c
blob0122f5351577735cca7d5b1347284f706dd4990d
1 /*
2 * Driver for PC-speaker like devices found on various Sparc systems.
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>
14 #include <asm/io.h>
16 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
17 MODULE_DESCRIPTION("Sparc Speaker beeper driver");
18 MODULE_LICENSE("GPL");
20 struct grover_beep_info {
21 void __iomem *freq_regs;
22 void __iomem *enable_reg;
25 struct bbc_beep_info {
26 u32 clock_freq;
27 void __iomem *regs;
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;
41 static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
43 u32 val, clock_freq = info->clock_freq;
44 int i;
46 if (!count)
47 return 0;
49 if (count <= clock_freq >> 20)
50 return 1 << 18;
52 if (count >= clock_freq >> 12)
53 return 1 << 10;
55 val = 1 << 18;
56 for (i = 19; i >= 11; i--) {
57 val >>= 1;
58 if (count <= clock_freq >> i)
59 break;
62 return val;
65 static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
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;
72 if (type != EV_SND)
73 return -1;
75 switch (code) {
76 case SND_BELL: if (value) value = 1000;
77 case SND_TONE: break;
78 default: return -1;
81 if (value > 20 && value < 32767)
82 count = 1193182 / value;
84 count = bbc_count_to_reg(info, count);
86 spin_lock_irqsave(&state->lock, flags);
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);
98 spin_unlock_irqrestore(&state->lock, flags);
100 return 0;
103 static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
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;
110 if (type != EV_SND)
111 return -1;
113 switch (code) {
114 case SND_BELL: if (value) value = 1000;
115 case SND_TONE: break;
116 default: return -1;
119 if (value > 20 && value < 32767)
120 count = 1193182 / value;
122 spin_lock_irqsave(&state->lock, flags);
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);
137 spin_unlock_irqrestore(&state->lock, flags);
139 return 0;
142 static int __devinit sparcspkr_probe(struct device *dev)
144 struct sparcspkr_state *state = dev_get_drvdata(dev);
145 struct input_dev *input_dev;
146 int error;
148 input_dev = input_allocate_device();
149 if (!input_dev)
150 return -ENOMEM;
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;
160 input_dev->evbit[0] = BIT_MASK(EV_SND);
161 input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
163 input_dev->event = state->event;
165 error = input_register_device(input_dev);
166 if (error) {
167 input_free_device(input_dev);
168 return error;
171 state->input_dev = input_dev;
173 return 0;
176 static void sparcspkr_shutdown(struct platform_device *dev)
178 struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
179 struct input_dev *input_dev = state->input_dev;
181 /* turn off the speaker */
182 state->event(input_dev, EV_SND, SND_BELL, 0);
185 static int __devinit bbc_beep_probe(struct platform_device *op)
187 struct sparcspkr_state *state;
188 struct bbc_beep_info *info;
189 struct device_node *dp;
190 int err = -ENOMEM;
192 state = kzalloc(sizeof(*state), GFP_KERNEL);
193 if (!state)
194 goto out_err;
196 state->name = "Sparc BBC Speaker";
197 state->event = bbc_spkr_event;
198 spin_lock_init(&state->lock);
200 dp = of_find_node_by_path("/");
201 err = -ENODEV;
202 if (!dp)
203 goto out_free;
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;
210 info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
211 if (!info->regs)
212 goto out_free;
214 dev_set_drvdata(&op->dev, state);
216 err = sparcspkr_probe(&op->dev);
217 if (err)
218 goto out_clear_drvdata;
220 return 0;
222 out_clear_drvdata:
223 dev_set_drvdata(&op->dev, NULL);
224 of_iounmap(&op->resource[0], info->regs, 6);
226 out_free:
227 kfree(state);
228 out_err:
229 return err;
232 static int __devexit bbc_remove(struct platform_device *op)
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;
238 /* turn off the speaker */
239 state->event(input_dev, EV_SND, SND_BELL, 0);
241 input_unregister_device(input_dev);
243 of_iounmap(&op->resource[0], info->regs, 6);
245 dev_set_drvdata(&op->dev, NULL);
246 kfree(state);
248 return 0;
251 static const struct of_device_id bbc_beep_match[] = {
253 .name = "beep",
254 .compatible = "SUNW,bbc-beep",
259 static struct platform_driver bbc_beep_driver = {
260 .driver = {
261 .name = "bbcbeep",
262 .owner = THIS_MODULE,
263 .of_match_table = bbc_beep_match,
265 .probe = bbc_beep_probe,
266 .remove = __devexit_p(bbc_remove),
267 .shutdown = sparcspkr_shutdown,
270 static int __devinit grover_beep_probe(struct platform_device *op)
272 struct sparcspkr_state *state;
273 struct grover_beep_info *info;
274 int err = -ENOMEM;
276 state = kzalloc(sizeof(*state), GFP_KERNEL);
277 if (!state)
278 goto out_err;
280 state->name = "Sparc Grover Speaker";
281 state->event = grover_spkr_event;
282 spin_lock_init(&state->lock);
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;
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;
293 dev_set_drvdata(&op->dev, state);
295 err = sparcspkr_probe(&op->dev);
296 if (err)
297 goto out_clear_drvdata;
299 return 0;
301 out_clear_drvdata:
302 dev_set_drvdata(&op->dev, NULL);
303 of_iounmap(&op->resource[3], info->enable_reg, 1);
305 out_unmap_freq_regs:
306 of_iounmap(&op->resource[2], info->freq_regs, 2);
307 out_free:
308 kfree(state);
309 out_err:
310 return err;
313 static int __devexit grover_remove(struct platform_device *op)
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;
319 /* turn off the speaker */
320 state->event(input_dev, EV_SND, SND_BELL, 0);
322 input_unregister_device(input_dev);
324 of_iounmap(&op->resource[3], info->enable_reg, 1);
325 of_iounmap(&op->resource[2], info->freq_regs, 2);
327 dev_set_drvdata(&op->dev, NULL);
328 kfree(state);
330 return 0;
333 static const struct of_device_id grover_beep_match[] = {
335 .name = "beep",
336 .compatible = "SUNW,smbus-beep",
341 static struct platform_driver grover_beep_driver = {
342 .driver = {
343 .name = "groverbeep",
344 .owner = THIS_MODULE,
345 .of_match_table = grover_beep_match,
347 .probe = grover_beep_probe,
348 .remove = __devexit_p(grover_remove),
349 .shutdown = sparcspkr_shutdown,
352 static int __init sparcspkr_init(void)
354 int err = platform_driver_register(&bbc_beep_driver);
356 if (!err) {
357 err = platform_driver_register(&grover_beep_driver);
358 if (err)
359 platform_driver_unregister(&bbc_beep_driver);
362 return err;
365 static void __exit sparcspkr_exit(void)
367 platform_driver_unregister(&bbc_beep_driver);
368 platform_driver_unregister(&grover_beep_driver);
371 module_init(sparcspkr_init);
372 module_exit(sparcspkr_exit);