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 __devinit 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 int sparcspkr_shutdown(struct of_device *dev) 177 { 178 struct sparcspkr_state *state = dev_get_drvdata(&dev->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 return 0; 185 } 186 187 static int __devinit bbc_beep_probe(struct of_device *op, const struct of_device_id *match) 188 { 189 struct sparcspkr_state *state; 190 struct bbc_beep_info *info; 191 struct device_node *dp; 192 int err = -ENOMEM; 193 194 state = kzalloc(sizeof(*state), GFP_KERNEL); 195 if (!state) 196 goto out_err; 197 198 state->name = "Sparc BBC Speaker"; 199 state->event = bbc_spkr_event; 200 spin_lock_init(&state->lock); 201 202 dp = of_find_node_by_path("/"); 203 err = -ENODEV; 204 if (!dp) 205 goto out_free; 206 207 info = &state->u.bbc; 208 info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0); 209 if (!info->clock_freq) 210 goto out_free; 211 212 info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep"); 213 if (!info->regs) 214 goto out_free; 215 216 dev_set_drvdata(&op->dev, state); 217 218 err = sparcspkr_probe(&op->dev); 219 if (err) 220 goto out_clear_drvdata; 221 222 return 0; 223 224 out_clear_drvdata: 225 dev_set_drvdata(&op->dev, NULL); 226 of_iounmap(&op->resource[0], info->regs, 6); 227 228 out_free: 229 kfree(state); 230 out_err: 231 return err; 232 } 233 234 static int __devexit bbc_remove(struct of_device *op) 235 { 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; 239 240 /* turn off the speaker */ 241 state->event(input_dev, EV_SND, SND_BELL, 0); 242 243 input_unregister_device(input_dev); 244 245 of_iounmap(&op->resource[0], info->regs, 6); 246 247 dev_set_drvdata(&op->dev, NULL); 248 kfree(state); 249 250 return 0; 251 } 252 253 static const struct of_device_id bbc_beep_match[] = { 254 { 255 .name = "beep", 256 .compatible = "SUNW,bbc-beep", 257 }, 258 {}, 259 }; 260 261 static struct of_platform_driver bbc_beep_driver = { 262 .name = "bbcbeep", 263 .match_table = bbc_beep_match, 264 .probe = bbc_beep_probe, 265 .remove = __devexit_p(bbc_remove), 266 .shutdown = sparcspkr_shutdown, 267 }; 268 269 static int __devinit grover_beep_probe(struct of_device *op, const struct of_device_id *match) 270 { 271 struct sparcspkr_state *state; 272 struct grover_beep_info *info; 273 int err = -ENOMEM; 274 275 state = kzalloc(sizeof(*state), GFP_KERNEL); 276 if (!state) 277 goto out_err; 278 279 state->name = "Sparc Grover Speaker"; 280 state->event = grover_spkr_event; 281 spin_lock_init(&state->lock); 282 283 info = &state->u.grover; 284 info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq"); 285 if (!info->freq_regs) 286 goto out_free; 287 288 info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable"); 289 if (!info->enable_reg) 290 goto out_unmap_freq_regs; 291 292 dev_set_drvdata(&op->dev, state); 293 294 err = sparcspkr_probe(&op->dev); 295 if (err) 296 goto out_clear_drvdata; 297 298 return 0; 299 300 out_clear_drvdata: 301 dev_set_drvdata(&op->dev, NULL); 302 of_iounmap(&op->resource[3], info->enable_reg, 1); 303 304 out_unmap_freq_regs: 305 of_iounmap(&op->resource[2], info->freq_regs, 2); 306 out_free: 307 kfree(state); 308 out_err: 309 return err; 310 } 311 312 static int __devexit grover_remove(struct of_device *op) 313 { 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; 317 318 /* turn off the speaker */ 319 state->event(input_dev, EV_SND, SND_BELL, 0); 320 321 input_unregister_device(input_dev); 322 323 of_iounmap(&op->resource[3], info->enable_reg, 1); 324 of_iounmap(&op->resource[2], info->freq_regs, 2); 325 326 dev_set_drvdata(&op->dev, NULL); 327 kfree(state); 328 329 return 0; 330 } 331 332 static const struct of_device_id grover_beep_match[] = { 333 { 334 .name = "beep", 335 .compatible = "SUNW,smbus-beep", 336 }, 337 {}, 338 }; 339 340 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, 346 }; 347 348 static int __init sparcspkr_init(void) 349 { 350 int err = of_register_driver(&bbc_beep_driver, 351 &of_platform_bus_type); 352 353 if (!err) { 354 err = of_register_driver(&grover_beep_driver, 355 &of_platform_bus_type); 356 if (err) 357 of_unregister_driver(&bbc_beep_driver); 358 } 359 360 return err; 361 } 362 363 static void __exit sparcspkr_exit(void) 364 { 365 of_unregister_driver(&bbc_beep_driver); 366 of_unregister_driver(&grover_beep_driver); 367 } 368 369 module_init(sparcspkr_init); 370 module_exit(sparcspkr_exit); 371