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)
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>
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 {
30 struct sparcspkr_state {
32 int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
34 struct input_dev *input_dev;
36 struct grover_beep_info grover;
37 struct bbc_beep_info bbc;
41 static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
43 u32 val, clock_freq = info->clock_freq;
49 if (count <= clock_freq >> 20)
52 if (count >= clock_freq >> 12)
56 for (i = 19; i >= 11; i--) {
58 if (count <= clock_freq >> i)
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;
76 case SND_BELL: if (value) value = 1000;
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);
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);
95 outb(0x00, info->regs + 0);
98 spin_unlock_irqrestore(&state->lock, flags);
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;
114 case SND_BELL: if (value) value = 1000;
115 case SND_TONE: break;
119 if (value > 20 && value < 32767)
120 count = 1193182 / value;
122 spin_lock_irqsave(&state->lock, flags);
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);
133 /* disable counter 2 */
134 outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg);
137 spin_unlock_irqrestore(&state->lock, flags);
142 static int __devinit sparcspkr_probe(struct device *dev)
144 struct sparcspkr_state *state = dev_get_drvdata(dev);
145 struct input_dev *input_dev;
148 input_dev = input_allocate_device();
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);
167 input_free_device(input_dev);
171 state->input_dev = input_dev;
176 static int sparcspkr_shutdown(struct of_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);
187 static int __devinit bbc_beep_probe(struct of_device *op, const struct of_device_id *match)
189 struct sparcspkr_state *state;
190 struct bbc_beep_info *info;
191 struct device_node *dp;
194 state = kzalloc(sizeof(*state), GFP_KERNEL);
198 state->name = "Sparc BBC Speaker";
199 state->event = bbc_spkr_event;
200 spin_lock_init(&state->lock);
202 dp = of_find_node_by_path("/");
207 info = &state->u.bbc;
208 info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
209 if (!info->clock_freq)
212 info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
216 dev_set_drvdata(&op->dev, state);
218 err = sparcspkr_probe(&op->dev);
220 goto out_clear_drvdata;
225 dev_set_drvdata(&op->dev, NULL);
226 of_iounmap(&op->resource[0], info->regs, 6);
234 static int __devexit bbc_remove(struct of_device *op)
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;
240 /* turn off the speaker */
241 state->event(input_dev, EV_SND, SND_BELL, 0);
243 input_unregister_device(input_dev);
245 of_iounmap(&op->resource[0], info->regs, 6);
247 dev_set_drvdata(&op->dev, NULL);
253 static const struct of_device_id bbc_beep_match[] = {
256 .compatible = "SUNW,bbc-beep",
261 static struct of_platform_driver bbc_beep_driver = {
263 .match_table = bbc_beep_match,
264 .probe = bbc_beep_probe,
265 .remove = __devexit_p(bbc_remove),
266 .shutdown = sparcspkr_shutdown,
269 static int __devinit grover_beep_probe(struct of_device *op, const struct of_device_id *match)
271 struct sparcspkr_state *state;
272 struct grover_beep_info *info;
275 state = kzalloc(sizeof(*state), GFP_KERNEL);
279 state->name = "Sparc Grover Speaker";
280 state->event = grover_spkr_event;
281 spin_lock_init(&state->lock);
283 info = &state->u.grover;
284 info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
285 if (!info->freq_regs)
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;
292 dev_set_drvdata(&op->dev, state);
294 err = sparcspkr_probe(&op->dev);
296 goto out_clear_drvdata;
301 dev_set_drvdata(&op->dev, NULL);
302 of_iounmap(&op->resource[3], info->enable_reg, 1);
305 of_iounmap(&op->resource[2], info->freq_regs, 2);
312 static int __devexit grover_remove(struct of_device *op)
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;
318 /* turn off the speaker */
319 state->event(input_dev, EV_SND, SND_BELL, 0);
321 input_unregister_device(input_dev);
323 of_iounmap(&op->resource[3], info->enable_reg, 1);
324 of_iounmap(&op->resource[2], info->freq_regs, 2);
326 dev_set_drvdata(&op->dev, NULL);
332 static const struct of_device_id grover_beep_match[] = {
335 .compatible = "SUNW,smbus-beep",
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,
348 static int __init sparcspkr_init(void)
350 int err = of_register_driver(&bbc_beep_driver,
351 &of_platform_bus_type);
354 err = of_register_driver(&grover_beep_driver,
355 &of_platform_bus_type);
357 of_unregister_driver(&bbc_beep_driver);
363 static void __exit sparcspkr_exit(void)
365 of_unregister_driver(&bbc_beep_driver);
366 of_unregister_driver(&grover_beep_driver);
369 module_init(sparcspkr_init);
370 module_exit(sparcspkr_exit);