Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/input/misc/sparcspkr.c

  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 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 void sparcspkr_shutdown(struct platform_device *dev)
177 {
178         struct sparcspkr_state *state = platform_get_drvdata(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 
185 static 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         platform_set_drvdata(op, state);
215 
216         err = sparcspkr_probe(&op->dev);
217         if (err)
218                 goto out_clear_drvdata;
219 
220         return 0;
221 
222 out_clear_drvdata:
223         of_iounmap(&op->resource[0], info->regs, 6);
224 
225 out_free:
226         kfree(state);
227 out_err:
228         return err;
229 }
230 
231 static int bbc_remove(struct platform_device *op)
232 {
233         struct sparcspkr_state *state = platform_get_drvdata(op);
234         struct input_dev *input_dev = state->input_dev;
235         struct bbc_beep_info *info = &state->u.bbc;
236 
237         /* turn off the speaker */
238         state->event(input_dev, EV_SND, SND_BELL, 0);
239 
240         input_unregister_device(input_dev);
241 
242         of_iounmap(&op->resource[0], info->regs, 6);
243 
244         kfree(state);
245 
246         return 0;
247 }
248 
249 static const struct of_device_id bbc_beep_match[] = {
250         {
251                 .name = "beep",
252                 .compatible = "SUNW,bbc-beep",
253         },
254         {},
255 };
256 
257 static struct platform_driver bbc_beep_driver = {
258         .driver = {
259                 .name = "bbcbeep",
260                 .owner = THIS_MODULE,
261                 .of_match_table = bbc_beep_match,
262         },
263         .probe          = bbc_beep_probe,
264         .remove         = bbc_remove,
265         .shutdown       = sparcspkr_shutdown,
266 };
267 
268 static int grover_beep_probe(struct platform_device *op)
269 {
270         struct sparcspkr_state *state;
271         struct grover_beep_info *info;
272         int err = -ENOMEM;
273 
274         state = kzalloc(sizeof(*state), GFP_KERNEL);
275         if (!state)
276                 goto out_err;
277 
278         state->name = "Sparc Grover Speaker";
279         state->event = grover_spkr_event;
280         spin_lock_init(&state->lock);
281 
282         info = &state->u.grover;
283         info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
284         if (!info->freq_regs)
285                 goto out_free;
286 
287         info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
288         if (!info->enable_reg)
289                 goto out_unmap_freq_regs;
290 
291         platform_set_drvdata(op, state);
292 
293         err = sparcspkr_probe(&op->dev);
294         if (err)
295                 goto out_clear_drvdata;
296 
297         return 0;
298 
299 out_clear_drvdata:
300         of_iounmap(&op->resource[3], info->enable_reg, 1);
301 
302 out_unmap_freq_regs:
303         of_iounmap(&op->resource[2], info->freq_regs, 2);
304 out_free:
305         kfree(state);
306 out_err:
307         return err;
308 }
309 
310 static int grover_remove(struct platform_device *op)
311 {
312         struct sparcspkr_state *state = platform_get_drvdata(op);
313         struct grover_beep_info *info = &state->u.grover;
314         struct input_dev *input_dev = state->input_dev;
315 
316         /* turn off the speaker */
317         state->event(input_dev, EV_SND, SND_BELL, 0);
318 
319         input_unregister_device(input_dev);
320 
321         of_iounmap(&op->resource[3], info->enable_reg, 1);
322         of_iounmap(&op->resource[2], info->freq_regs, 2);
323 
324         kfree(state);
325 
326         return 0;
327 }
328 
329 static const struct of_device_id grover_beep_match[] = {
330         {
331                 .name = "beep",
332                 .compatible = "SUNW,smbus-beep",
333         },
334         {},
335 };
336 
337 static struct platform_driver grover_beep_driver = {
338         .driver = {
339                 .name = "groverbeep",
340                 .owner = THIS_MODULE,
341                 .of_match_table = grover_beep_match,
342         },
343         .probe          = grover_beep_probe,
344         .remove         = grover_remove,
345         .shutdown       = sparcspkr_shutdown,
346 };
347 
348 static int __init sparcspkr_init(void)
349 {
350         int err = platform_driver_register(&bbc_beep_driver);
351 
352         if (!err) {
353                 err = platform_driver_register(&grover_beep_driver);
354                 if (err)
355                         platform_driver_unregister(&bbc_beep_driver);
356         }
357 
358         return err;
359 }
360 
361 static void __exit sparcspkr_exit(void)
362 {
363         platform_driver_unregister(&bbc_beep_driver);
364         platform_driver_unregister(&grover_beep_driver);
365 }
366 
367 module_init(sparcspkr_init);
368 module_exit(sparcspkr_exit);
369 

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