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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 | /********************************************************************* * * msnd.c - Driver Base * * Turtle Beach MultiSound Sound Card Driver for Linux * * Copyright (C) 1998 Andrew Veliath * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Id: msnd.c,v 1.17 1999/03/21 16:50:09 andrewtv Exp $ * ********************************************************************/ #include <linux/module.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/types.h> #include <linux/delay.h> #include <linux/mm.h> #include <linux/init.h> #include <linux/interrupt.h> #include <asm/io.h> #include <asm/uaccess.h> #include <linux/spinlock.h> #include <asm/irq.h> #include "msnd.h" #define LOGNAME "msnd" #define MSND_MAX_DEVS 4 static multisound_dev_t *devs[MSND_MAX_DEVS]; static int num_devs; int __init msnd_register(multisound_dev_t *dev) { int i; for (i = 0; i < MSND_MAX_DEVS; ++i) if (devs[i] == NULL) break; if (i == MSND_MAX_DEVS) return -ENOMEM; devs[i] = dev; ++num_devs; return 0; } void msnd_unregister(multisound_dev_t *dev) { int i; for (i = 0; i < MSND_MAX_DEVS; ++i) if (devs[i] == dev) break; if (i == MSND_MAX_DEVS) { printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n"); return; } devs[i] = NULL; --num_devs; } void msnd_init_queue(void __iomem *base, int start, int size) { writew(PCTODSP_BASED(start), base + JQS_wStart); writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize); writew(0, base + JQS_wHead); writew(0, base + JQS_wTail); } void msnd_fifo_init(msnd_fifo *f) { f->data = NULL; } void msnd_fifo_free(msnd_fifo *f) { if (f->data) { vfree(f->data); f->data = NULL; } } int msnd_fifo_alloc(msnd_fifo *f, size_t n) { msnd_fifo_free(f); f->data = (char *)vmalloc(n); f->n = n; f->tail = 0; f->head = 0; f->len = 0; if (!f->data) return -ENOMEM; return 0; } void msnd_fifo_make_empty(msnd_fifo *f) { f->len = f->tail = f->head = 0; } int msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len) { int count = 0; while ((count < len) && (f->len != f->n)) { int nwritten; if (f->head <= f->tail) { nwritten = len - count; if (nwritten > f->n - f->tail) nwritten = f->n - f->tail; } else { nwritten = f->head - f->tail; if (nwritten > len - count) nwritten = len - count; } memcpy_fromio(f->data + f->tail, buf, nwritten); count += nwritten; buf += nwritten; f->len += nwritten; f->tail += nwritten; f->tail %= f->n; } return count; } int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len) { int count = 0; while ((count < len) && (f->len != f->n)) { int nwritten; if (f->head <= f->tail) { nwritten = len - count; if (nwritten > f->n - f->tail) nwritten = f->n - f->tail; } else { nwritten = f->head - f->tail; if (nwritten > len - count) nwritten = len - count; } memcpy(f->data + f->tail, buf, nwritten); count += nwritten; buf += nwritten; f->len += nwritten; f->tail += nwritten; f->tail %= f->n; } return count; } int msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len) { int count = 0; while ((count < len) && (f->len > 0)) { int nread; if (f->tail <= f->head) { nread = len - count; if (nread > f->n - f->head) nread = f->n - f->head; } else { nread = f->tail - f->head; if (nread > len - count) nread = len - count; } memcpy_toio(buf, f->data + f->head, nread); count += nread; buf += nread; f->len -= nread; f->head += nread; f->head %= f->n; } return count; } int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len) { int count = 0; while ((count < len) && (f->len > 0)) { int nread; if (f->tail <= f->head) { nread = len - count; if (nread > f->n - f->head) nread = f->n - f->head; } else { nread = f->tail - f->head; if (nread > len - count) nread = len - count; } memcpy(buf, f->data + f->head, nread); count += nread; buf += nread; f->len -= nread; f->head += nread; f->head %= f->n; } return count; } static int msnd_wait_TXDE(multisound_dev_t *dev) { register unsigned int io = dev->io; register int timeout = 1000; while(timeout-- > 0) if (msnd_inb(io + HP_ISR) & HPISR_TXDE) return 0; return -EIO; } static int msnd_wait_HC0(multisound_dev_t *dev) { register unsigned int io = dev->io; register int timeout = 1000; while(timeout-- > 0) if (!(msnd_inb(io + HP_CVR) & HPCVR_HC)) return 0; return -EIO; } int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd) { unsigned long flags; spin_lock_irqsave(&dev->lock, flags); if (msnd_wait_HC0(dev) == 0) { msnd_outb(cmd, dev->io + HP_CVR); spin_unlock_irqrestore(&dev->lock, flags); return 0; } spin_unlock_irqrestore(&dev->lock, flags); printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n"); return -EIO; } int msnd_send_word(multisound_dev_t *dev, unsigned char high, unsigned char mid, unsigned char low) { register unsigned int io = dev->io; if (msnd_wait_TXDE(dev) == 0) { msnd_outb(high, io + HP_TXH); msnd_outb(mid, io + HP_TXM); msnd_outb(low, io + HP_TXL); return 0; } printk(KERN_DEBUG LOGNAME ": Send host word timeout\n"); return -EIO; } int msnd_upload_host(multisound_dev_t *dev, char *bin, int len) { int i; if (len % 3 != 0) { printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n"); return -EINVAL; } for (i = 0; i < len; i += 3) if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0) return -EIO; msnd_inb(dev->io + HP_RXL); msnd_inb(dev->io + HP_CVR); return 0; } int msnd_enable_irq(multisound_dev_t *dev) { unsigned long flags; if (dev->irq_ref++) return 0; printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n"); spin_lock_irqsave(&dev->lock, flags); if (msnd_wait_TXDE(dev) == 0) { msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR); if (dev->type == msndClassic) msnd_outb(dev->irqid, dev->io + HP_IRQM); msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR); msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR); enable_irq(dev->irq); msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size); spin_unlock_irqrestore(&dev->lock, flags); return 0; } spin_unlock_irqrestore(&dev->lock, flags); printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n"); return -EIO; } int msnd_disable_irq(multisound_dev_t *dev) { unsigned long flags; if (--dev->irq_ref > 0) return 0; if (dev->irq_ref < 0) printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref); printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n"); spin_lock_irqsave(&dev->lock, flags); if (msnd_wait_TXDE(dev) == 0) { msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR); if (dev->type == msndClassic) msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM); disable_irq(dev->irq); spin_unlock_irqrestore(&dev->lock, flags); return 0; } spin_unlock_irqrestore(&dev->lock, flags); printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n"); return -EIO; } #ifndef LINUX20 EXPORT_SYMBOL(msnd_register); EXPORT_SYMBOL(msnd_unregister); EXPORT_SYMBOL(msnd_init_queue); EXPORT_SYMBOL(msnd_fifo_init); EXPORT_SYMBOL(msnd_fifo_free); EXPORT_SYMBOL(msnd_fifo_alloc); EXPORT_SYMBOL(msnd_fifo_make_empty); EXPORT_SYMBOL(msnd_fifo_write_io); EXPORT_SYMBOL(msnd_fifo_read_io); EXPORT_SYMBOL(msnd_fifo_write); EXPORT_SYMBOL(msnd_fifo_read); EXPORT_SYMBOL(msnd_send_dsp_cmd); EXPORT_SYMBOL(msnd_send_word); EXPORT_SYMBOL(msnd_upload_host); EXPORT_SYMBOL(msnd_enable_irq); EXPORT_SYMBOL(msnd_disable_irq); #endif #ifdef MODULE MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>"); MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base"); MODULE_LICENSE("GPL"); int init_module(void) { return 0; } void cleanup_module(void) { } #endif |