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 13 #include <asm/io.h> 14 15 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); 16 MODULE_DESCRIPTION("Sparc Speaker beeper driver"); 17 MODULE_LICENSE("GPL"); 18 19 struct grover_beep_info { 20 void __iomem *freq_regs; 21 void __iomem *enable_reg; 22 }; 23 24 struct bbc_beep_info { 25 u32 clock_freq; 26 void __iomem *regs; 27 }; 28 29 struct sparcspkr_state { 30 const char *name; 31 int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value); 32 spinlock_t lock; 33 struct input_dev *input_dev; 34 union { 35 struct grover_beep_info grover; 36 struct bbc_beep_info bbc; 37 } u; 38 }; 39 40 static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count) 41 { 42 u32 val, clock_freq = info->clock_freq; 43 int i; 44 45 if (!count) 46 return 0; 47 48 if (count <= clock_freq >> 20) 49 return 1 << 18; 50 51 if (count >= clock_freq >> 12) 52 return 1 << 10; 53 54 val = 1 << 18; 55 for (i = 19; i >= 11; i--) { 56 val >>= 1; 57 if (count <= clock_freq >> i) 58 break; 59 } 60 61 return val; 62 } 63 64 static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 65 { 66 struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent); 67 struct bbc_beep_info *info = &state->u.bbc; 68 unsigned int count = 0; 69 unsigned long flags; 70 71 if (type != EV_SND) 72 return -1; 73 74 switch (code) { 75 case SND_BELL: if (value) value = 1000; 76 case SND_TONE: break; 77 default: return -1; 78 } 79 80 if (value > 20 && value < 32767) 81 count = 1193182 / value; 82 83 count = bbc_count_to_reg(info, count); 84 85 spin_lock_irqsave(&state->lock, flags); 86 87 if (count) { 88 outb(0x01, info->regs + 0); 89 outb(0x00, info->regs + 2); 90 outb((count >> 16) & 0xff, info->regs + 3); 91 outb((count >> 8) & 0xff, info->regs + 4); 92 outb(0x00, info->regs + 5); 93 } else { 94 outb(0x00, info->regs + 0); 95 } 96 97 spin_unlock_irqrestore(&state->lock, flags); 98 99 return 0; 100 } 101 102 static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 103 { 104 struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent); 105 struct grover_beep_info *info = &state->u.grover; 106 unsigned int count = 0; 107 unsigned long flags; 108 109 if (type != EV_SND) 110 return -1; 111 112 switch (code) { 113 case SND_BELL: if (value) value = 1000; 114 case SND_TONE: break; 115 default: return -1; 116 } 117 118 if (value > 20 && value < 32767) 119 count = 1193182 / value; 120 121 spin_lock_irqsave(&state->lock, flags); 122 123 if (count) { 124 /* enable counter 2 */ 125 outb(inb(info->enable_reg) | 3, info->enable_reg); 126 /* set command for counter 2, 2 byte write */ 127 outb(0xB6, info->freq_regs + 1); 128 /* select desired HZ */ 129 outb(count & 0xff, info->freq_regs + 0); 130 outb((count >> 8) & 0xff, info->freq_regs + 0); 131 } else { 132 /* disable counter 2 */ 133 outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg); 134 } 135 136 spin_unlock_irqrestore(&state->lock, flags); 137 138 return 0; 139 } 140 141 static int __devinit sparcspkr_probe(struct device *dev) 142 { 143 struct sparcspkr_state *state = dev_get_drvdata(dev); 144 struct input_dev *input_dev; 145 int error; 146 147 input_dev = input_allocate_device(); 148 if (!input_dev) 149 return -ENOMEM; 150 151 input_dev->name = state->name; 152 input_dev->phys = "sparc/input0"; 153 input_dev->id.bustype = BUS_ISA; 154 input_dev->id.vendor = 0x001f; 155 input_dev->id.product = 0x0001; 156 input_dev->id.version = 0x0100; 157 input_dev->dev.parent = dev; 158 159 input_dev->evbit[0] = BIT_MASK(EV_SND); 160 input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); 161 162 input_dev->event = state->event; 163 164 error = input_register_device(input_dev); 165 if (error) { 166 input_free_device(input_dev); 167 return error; 168 } 169 170 state->input_dev = input_dev; 171 172 return 0; 173 } 174 175 static int sparcspkr_shutdown(struct of_device *dev) 176 { 177 struct sparcspkr_state *state = dev_get_drvdata(&dev->dev); 178 struct input_dev *input_dev = state->input_dev; 179 180 /* turn off the speaker */ 181 state->event(input_dev, EV_SND, SND_BELL, 0); 182 183 return 0; 184 } 185 186 static int __devinit bbc_beep_probe(struct of_device *op, const struct of_device_id *match) 187 { 188 struct sparcspkr_state *state; 189 struct bbc_beep_info *info; 190 struct device_node *dp; 191 int err = -ENOMEM; 192 193 state = kzalloc(sizeof(*state), GFP_KERNEL); 194 if (!state) 195 goto out_err; 196 197 state->name = "Sparc BBC Speaker"; 198 state->event = bbc_spkr_event; 199 spin_lock_init(&state->lock); 200 201 dp = of_find_node_by_path("/"); 202 err = -ENODEV; 203 if (!dp) 204 goto out_free; 205 206 info = &state->u.bbc; 207 info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0); 208 if (!info->clock_freq) 209 goto out_free; 210 211 info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep"); 212 if (!info->regs) 213 goto out_free; 214 215 dev_set_drvdata(&op->dev, state); 216 217 err = sparcspkr_probe(&op->dev); 218 if (err) 219 goto out_clear_drvdata; 220 221 return 0; 222 223 out_clear_drvdata: 224 dev_set_drvdata(&op->dev, NULL); 225 of_iounmap(&op->resource[0], info->regs, 6); 226 227 out_free: 228 kfree(state); 229 out_err: 230 return err; 231 } 232 233 static int bbc_remove(struct of_device *op) 234 { 235 struct sparcspkr_state *state = dev_get_drvdata(&op->dev); 236 struct input_dev *input_dev = state->input_dev; 237 struct bbc_beep_info *info = &state->u.bbc; 238 239 /* turn off the speaker */ 240 state->event(input_dev, EV_SND, SND_BELL, 0); 241 242 input_unregister_device(input_dev); 243 244 of_iounmap(&op->resource[0], info->regs, 6); 245 246 dev_set_drvdata(&op->dev, NULL); 247 kfree(state); 248 249 return 0; 250 } 251 252 static struct of_device_id bbc_beep_match[] = { 253 { 254 .name = "beep", 255 .compatible = "SUNW,bbc-beep", 256 }, 257 {}, 258 }; 259 260 static struct of_platform_driver bbc_beep_driver = { 261 .name = "bbcbeep", 262 .match_table = bbc_beep_match, 263 .probe = bbc_beep_probe, 264 .remove = __devexit_p(bbc_remove), 265 .shutdown = sparcspkr_shutdown, 266 }; 267 268 static int __devinit grover_beep_probe(struct of_device *op, const struct of_device_id *match) 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 dev_set_drvdata(&op->dev, 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 dev_set_drvdata(&op->dev, NULL); 301 of_iounmap(&op->resource[3], info->enable_reg, 1); 302 303 out_unmap_freq_regs: 304 of_iounmap(&op->resource[2], info->freq_regs, 2); 305 out_free: 306 kfree(state); 307 out_err: 308 return err; 309 } 310 311 static int grover_remove(struct of_device *op) 312 { 313 struct sparcspkr_state *state = dev_get_drvdata(&op->dev); 314 struct grover_beep_info *info = &state->u.grover; 315 struct input_dev *input_dev = state->input_dev; 316 317 /* turn off the speaker */ 318 state->event(input_dev, EV_SND, SND_BELL, 0); 319 320 input_unregister_device(input_dev); 321 322 of_iounmap(&op->resource[3], info->enable_reg, 1); 323 of_iounmap(&op->resource[2], info->freq_regs, 2); 324 325 dev_set_drvdata(&op->dev, NULL); 326 kfree(state); 327 328 return 0; 329 } 330 331 static struct of_device_id grover_beep_match[] = { 332 { 333 .name = "beep", 334 .compatible = "SUNW,smbus-beep", 335 }, 336 {}, 337 }; 338 339 static struct of_platform_driver grover_beep_driver = { 340 .name = "groverbeep", 341 .match_table = grover_beep_match, 342 .probe = grover_beep_probe, 343 .remove = __devexit_p(grover_remove), 344 .shutdown = sparcspkr_shutdown, 345 }; 346 347 static int __init sparcspkr_init(void) 348 { 349 int err = of_register_driver(&bbc_beep_driver, 350 &of_platform_bus_type); 351 352 if (!err) { 353 err = of_register_driver(&grover_beep_driver, 354 &of_platform_bus_type); 355 if (err) 356 of_unregister_driver(&bbc_beep_driver); 357 } 358 359 return err; 360 } 361 362 static void __exit sparcspkr_exit(void) 363 { 364 of_unregister_driver(&bbc_beep_driver); 365 of_unregister_driver(&grover_beep_driver); 366 } 367 368 module_init(sparcspkr_init); 369 module_exit(sparcspkr_exit); 370