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 sbus_writeb(0x01, info->regs + 0); 90 sbus_writeb(0x00, info->regs + 2); 91 sbus_writeb((count >> 16) & 0xff, info->regs + 3); 92 sbus_writeb((count >> 8) & 0xff, info->regs + 4); 93 sbus_writeb(0x00, info->regs + 5); 94 } else { 95 sbus_writeb(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 sbus_writeb(sbus_readb(info->enable_reg) | 3, info->enable_reg); 127 /* set command for counter 2, 2 byte write */ 128 sbus_writeb(0xB6, info->freq_regs + 1); 129 /* select desired HZ */ 130 sbus_writeb(count & 0xff, info->freq_regs + 0); 131 sbus_writeb((count >> 8) & 0xff, info->freq_regs + 0); 132 } else { 133 /* disable counter 2 */ 134 sbus_writeb(sbus_readb(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 MODULE_DEVICE_TABLE(of, bbc_beep_match); 257 258 static struct platform_driver bbc_beep_driver = { 259 .driver = { 260 .name = "bbcbeep", 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 MODULE_DEVICE_TABLE(of, grover_beep_match); 337 338 static struct platform_driver grover_beep_driver = { 339 .driver = { 340 .name = "groverbeep", 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 struct platform_driver * const drivers[] = { 349 &bbc_beep_driver, 350 &grover_beep_driver, 351 }; 352 353 static int __init sparcspkr_init(void) 354 { 355 return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 356 } 357 358 static void __exit sparcspkr_exit(void) 359 { 360 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 361 } 362 363 module_init(sparcspkr_init); 364 module_exit(sparcspkr_exit); 365