Merge master.kernel.org:/home/rmk/linux-2.6-serial
[linux-2.6] / 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 David S. Miller (davem@redhat.com)
6  */
7 #include <linux/config.h>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/input.h>
12 #include <linux/platform_device.h>
13
14 #include <asm/io.h>
15 #include <asm/ebus.h>
16 #ifdef CONFIG_SPARC64
17 #include <asm/isa.h>
18 #endif
19
20 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
21 MODULE_DESCRIPTION("Sparc Speaker beeper driver");
22 MODULE_LICENSE("GPL");
23
24 const char *beep_name;
25 static unsigned long beep_iobase;
26 static int (*beep_event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
27 static DEFINE_SPINLOCK(beep_lock);
28
29 static int ebus_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
30 {
31         unsigned int count = 0;
32         unsigned long flags;
33
34         if (type != EV_SND)
35                 return -1;
36
37         switch (code) {
38                 case SND_BELL: if (value) value = 1000;
39                 case SND_TONE: break;
40                 default: return -1;
41         }
42
43         if (value > 20 && value < 32767)
44                 count = 1193182 / value;
45
46         spin_lock_irqsave(&beep_lock, flags);
47
48         /* EBUS speaker only has on/off state, the frequency does not
49          * appear to be programmable.
50          */
51         if (beep_iobase & 0x2UL)
52                 outb(!!count, beep_iobase);
53         else
54                 outl(!!count, beep_iobase);
55
56         spin_unlock_irqrestore(&beep_lock, flags);
57
58         return 0;
59 }
60
61 #ifdef CONFIG_SPARC64
62 static int isa_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
63 {
64         unsigned int count = 0;
65         unsigned long flags;
66
67         if (type != EV_SND)
68                 return -1;
69
70         switch (code) {
71                 case SND_BELL: if (value) value = 1000;
72                 case SND_TONE: break;
73                 default: return -1;
74         }
75
76         if (value > 20 && value < 32767)
77                 count = 1193182 / value;
78
79         spin_lock_irqsave(&beep_lock, flags);
80
81         if (count) {
82                 /* enable counter 2 */
83                 outb(inb(beep_iobase + 0x61) | 3, beep_iobase + 0x61);
84                 /* set command for counter 2, 2 byte write */
85                 outb(0xB6, beep_iobase + 0x43);
86                 /* select desired HZ */
87                 outb(count & 0xff, beep_iobase + 0x42);
88                 outb((count >> 8) & 0xff, beep_iobase + 0x42);
89         } else {
90                 /* disable counter 2 */
91                 outb(inb_p(beep_iobase + 0x61) & 0xFC, beep_iobase + 0x61);
92         }
93
94         spin_unlock_irqrestore(&beep_lock, flags);
95
96         return 0;
97 }
98 #endif
99
100 static int __devinit sparcspkr_probe(struct platform_device *dev)
101 {
102         struct input_dev *input_dev;
103         int error;
104
105         input_dev = input_allocate_device();
106         if (!input_dev)
107                 return -ENOMEM;
108
109         input_dev->name = beep_name;
110         input_dev->phys = "sparc/input0";
111         input_dev->id.bustype = BUS_ISA;
112         input_dev->id.vendor = 0x001f;
113         input_dev->id.product = 0x0001;
114         input_dev->id.version = 0x0100;
115         input_dev->cdev.dev = &dev->dev;
116
117         input_dev->evbit[0] = BIT(EV_SND);
118         input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
119
120         input_dev->event = beep_event;
121
122         error = input_register_device(input_dev);
123         if (error) {
124                 input_free_device(input_dev);
125                 return error;
126         }
127
128         platform_set_drvdata(dev, input_dev);
129
130         return 0;
131 }
132
133 static int __devexit sparcspkr_remove(struct platform_device *dev)
134 {
135         struct input_dev *input_dev = platform_get_drvdata(dev);
136
137         input_unregister_device(input_dev);
138         platform_set_drvdata(dev, NULL);
139         /* turn off the speaker */
140         beep_event(NULL, EV_SND, SND_BELL, 0);
141
142         return 0;
143 }
144
145 static void sparcspkr_shutdown(struct platform_device *dev)
146 {
147         /* turn off the speaker */
148         beep_event(NULL, EV_SND, SND_BELL, 0);
149 }
150
151 static struct platform_driver sparcspkr_platform_driver = {
152         .driver         = {
153                 .name   = "sparcspkr",
154                 .owner  = THIS_MODULE,
155         },
156         .probe          = sparcspkr_probe,
157         .remove         = __devexit_p(sparcspkr_remove),
158         .shutdown       = sparcspkr_shutdown,
159 };
160
161 static struct platform_device *sparcspkr_platform_device;
162
163 static int __init sparcspkr_drv_init(void)
164 {
165         int error;
166
167         error = platform_driver_register(&sparcspkr_platform_driver);
168         if (error)
169                 return error;
170
171         sparcspkr_platform_device = platform_device_alloc("sparcspkr", -1);
172         if (!sparcspkr_platform_device) {
173                 error = -ENOMEM;
174                 goto err_unregister_driver;
175         }
176
177         error = platform_device_add(sparcspkr_platform_device);
178         if (error)
179                 goto err_free_device;
180
181         return 0;
182
183  err_free_device:
184         platform_device_put(sparcspkr_platform_device);
185  err_unregister_driver:
186         platform_driver_unregister(&sparcspkr_platform_driver);
187
188         return error;
189 }
190
191 static int __init sparcspkr_init(void)
192 {
193         struct linux_ebus *ebus;
194         struct linux_ebus_device *edev;
195 #ifdef CONFIG_SPARC64
196         struct sparc_isa_bridge *isa_br;
197         struct sparc_isa_device *isa_dev;
198 #endif
199
200         for_each_ebus(ebus) {
201                 for_each_ebusdev(edev, ebus) {
202                         if (!strcmp(edev->prom_name, "beep")) {
203                                 beep_name = "Sparc EBUS Speaker";
204                                 beep_event = ebus_spkr_event;
205                                 beep_iobase = edev->resource[0].start;
206                                 return sparcspkr_drv_init();
207                         }
208                 }
209         }
210 #ifdef CONFIG_SPARC64
211         for_each_isa(isa_br) {
212                 for_each_isadev(isa_dev, isa_br) {
213                         /* A hack, the beep device's base lives in
214                          * the DMA isa node.
215                          */
216                         if (!strcmp(isa_dev->prom_name, "dma")) {
217                                 beep_name = "Sparc ISA Speaker";
218                                 beep_event = isa_spkr_event,
219                                 beep_iobase = isa_dev->resource.start;
220                                 return sparcspkr_drv_init();
221                         }
222                 }
223         }
224 #endif
225
226         return -ENODEV;
227 }
228
229 static void __exit sparcspkr_exit(void)
230 {
231         platform_device_unregister(sparcspkr_platform_device);
232         platform_driver_unregister(&sparcspkr_platform_driver);
233 }
234
235 module_init(sparcspkr_init);
236 module_exit(sparcspkr_exit);