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 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/platform_device.h>
  12
  13 #include <asm/io.h>
  14 #include <asm/ebus.h>
  15 #include <asm/isa.h>
  16
  17 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
  18 MODULE_DESCRIPTION("Sparc Speaker beeper driver");
  19 MODULE_LICENSE("GPL");
  20
  21 struct sparcspkr_state {
  22         const char              *name;
  23         unsigned long           iobase;
  24         int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
  25         spinlock_t              lock;
  26         struct input_dev        *input_dev;
  27 };
  28
  29 static int ebus_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
  30 {
  31         struct sparcspkr_state *state = dev_get_drvdata(dev->cdev.dev);
  32         unsigned int count = 0;
  33         unsigned long flags;
  34
  35         if (type != EV_SND)
  36                 return -1;
  37
  38         switch (code) {
  39                 case SND_BELL: if (value) value = 1000;
  40                 case SND_TONE: break;
  41                 default: return -1;
  42         }
  43
  44         if (value > 20 && value < 32767)
  45                 count = 1193182 / value;
  46
  47         spin_lock_irqsave(&state->lock, flags);
  48
  49         /* EBUS speaker only has on/off state, the frequency does not
  50          * appear to be programmable.
  51          */
  52         if (state->iobase & 0x2UL)
  53                 outb(!!count, state->iobase);
  54         else
  55                 outl(!!count, state->iobase);
  56
  57         spin_unlock_irqrestore(&state->lock, flags);
  58
  59         return 0;
  60 }
  61
  62 static int isa_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
  63 {
  64         struct sparcspkr_state *state = dev_get_drvdata(dev->cdev.dev);
  65         unsigned int count = 0;
  66         unsigned long flags;
  67
  68         if (type != EV_SND)
  69                 return -1;
  70
  71         switch (code) {
  72                 case SND_BELL: if (value) value = 1000;
  73                 case SND_TONE: break;
  74                 default: return -1;
  75         }
  76
  77         if (value > 20 && value < 32767)
  78                 count = 1193182 / value;
  79
  80         spin_lock_irqsave(&state->lock, flags);
  81
  82         if (count) {
  83                 /* enable counter 2 */
  84                 outb(inb(state->iobase + 0x61) | 3, state->iobase + 0x61);
  85                 /* set command for counter 2, 2 byte write */
  86                 outb(0xB6, state->iobase + 0x43);
  87                 /* select desired HZ */
  88                 outb(count & 0xff, state->iobase + 0x42);
  89                 outb((count >> 8) & 0xff, state->iobase + 0x42);
  90         } else {
  91                 /* disable counter 2 */
  92                 outb(inb_p(state->iobase + 0x61) & 0xFC, state->iobase + 0x61);
  93         }
  94
  95         spin_unlock_irqrestore(&state->lock, flags);
  96
  97         return 0;
  98 }
  99
 100 static int __devinit sparcspkr_probe(struct device *dev)
 101 {
 102         struct sparcspkr_state *state = dev_get_drvdata(dev);
 103         struct input_dev *input_dev;
 104         int error;
 105
 106         input_dev = input_allocate_device();
 107         if (!input_dev)
 108                 return -ENOMEM;
 109
 110         input_dev->name = state->name;
 111         input_dev->phys = "sparc/input0";
 112         input_dev->id.bustype = BUS_ISA;
 113         input_dev->id.vendor = 0x001f;
 114         input_dev->id.product = 0x0001;
 115         input_dev->id.version = 0x0100;
 116         input_dev->cdev.dev = dev;
 117
 118         input_dev->evbit[0] = BIT(EV_SND);
 119         input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
 120
 121         input_dev->event = state->event;
 122
 123         error = input_register_device(input_dev);
 124         if (error) {
 125                 input_free_device(input_dev);
 126                 return error;
 127         }
 128
 129         state->input_dev = input_dev;
 130
 131         return 0;
 132 }
 133
 134 static int __devexit sparcspkr_remove(struct of_device *dev)
 135 {
 136         struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
 137         struct input_dev *input_dev = state->input_dev;
 138
 139         /* turn off the speaker */
 140         state->event(input_dev, EV_SND, SND_BELL, 0);
 141
 142         input_unregister_device(input_dev);
 143
 144         dev_set_drvdata(&dev->dev, NULL);
 145         kfree(state);
 146
 147         return 0;
 148 }
 149
 150 static int sparcspkr_shutdown(struct of_device *dev)
 151 {
 152         struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
 153         struct input_dev *input_dev = state->input_dev;
 154
 155         /* turn off the speaker */
 156         state->event(input_dev, EV_SND, SND_BELL, 0);
 157
 158         return 0;
 159 }
 160
 161 static int __devinit ebus_beep_probe(struct of_device *dev, const struct of_device_id *match)
 162 {
 163         struct linux_ebus_device *edev = to_ebus_device(&dev->dev);
 164         struct sparcspkr_state *state;
 165         int err;
 166
 167         state = kzalloc(sizeof(*state), GFP_KERNEL);
 168         if (!state)
 169                 return -ENOMEM;
 170
 171         state->name = "Sparc EBUS Speaker";
 172         state->iobase = edev->resource[0].start;
 173         state->event = ebus_spkr_event;
 174         spin_lock_init(&state->lock);
 175
 176         dev_set_drvdata(&dev->dev, state);
 177
 178         err = sparcspkr_probe(&dev->dev);
 179         if (err) {
 180                 dev_set_drvdata(&dev->dev, NULL);
 181                 kfree(state);
 182         }
 183
 184         return 0;
 185 }
 186
 187 static struct of_device_id ebus_beep_match[] = {
 188         {
 189                 .name = "beep",
 190         },
 191         {},
 192 };
 193
 194 static struct of_platform_driver ebus_beep_driver = {
 195         .name           = "beep",
 196         .match_table    = ebus_beep_match,
 197         .probe          = ebus_beep_probe,
 198         .remove         = sparcspkr_remove,
 199         .shutdown       = sparcspkr_shutdown,
 200 };
 201
 202 static int __devinit isa_beep_probe(struct of_device *dev, const struct of_device_id *match)
 203 {
 204         struct sparc_isa_device *idev = to_isa_device(&dev->dev);
 205         struct sparcspkr_state *state;
 206         int err;
 207
 208         state = kzalloc(sizeof(*state), GFP_KERNEL);
 209         if (!state)
 210                 return -ENOMEM;
 211
 212         state->name = "Sparc ISA Speaker";
 213         state->iobase = idev->resource.start;
 214         state->event = isa_spkr_event;
 215         spin_lock_init(&state->lock);
 216
 217         dev_set_drvdata(&dev->dev, state);
 218
 219         err = sparcspkr_probe(&dev->dev);
 220         if (err) {
 221                 dev_set_drvdata(&dev->dev, NULL);
 222                 kfree(state);
 223         }
 224
 225         return 0;
 226 }
 227
 228 static struct of_device_id isa_beep_match[] = {
 229         {
 230                 .name = "dma",
 231         },
 232         {},
 233 };
 234
 235 static struct of_platform_driver isa_beep_driver = {
 236         .name           = "beep",
 237         .match_table    = isa_beep_match,
 238         .probe          = isa_beep_probe,
 239         .remove         = sparcspkr_remove,
 240         .shutdown       = sparcspkr_shutdown,
 241 };
 242
 243 static int __init sparcspkr_init(void)
 244 {
 245         int err = of_register_driver(&ebus_beep_driver, &ebus_bus_type);
 246
 247         if (!err) {
 248                 err = of_register_driver(&isa_beep_driver, &isa_bus_type);
 249                 if (err)
 250                         of_unregister_driver(&ebus_beep_driver);
 251         }
 252
 253         return err;
 254 }
 255
 256 static void __exit sparcspkr_exit(void)
 257 {
 258         of_unregister_driver(&ebus_beep_driver);
 259         of_unregister_driver(&isa_beep_driver);
 260 }
 261
 262 module_init(sparcspkr_init);
 263 module_exit(sparcspkr_exit);