1 /* 2 * Low-level ALSA driver for the ENSONIQ SoundScape PnP 3 * Copyright (c) by Chris Rankin 4 * 5 * This driver was written in part using information obtained from 6 * the OSS/Free SoundScape driver, written by Hannu Savolainen. 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 */ 23 24 #include <sound/driver.h> 25 #include <linux/init.h> 26 #include <linux/err.h> 27 #include <linux/isa.h> 28 #include <linux/delay.h> 29 #include <linux/pnp.h> 30 #include <linux/spinlock.h> 31 #include <linux/moduleparam.h> 32 #include <asm/dma.h> 33 #include <sound/core.h> 34 #include <sound/hwdep.h> 35 #include <sound/cs4231.h> 36 #include <sound/mpu401.h> 37 #include <sound/initval.h> 38 39 #include <sound/sscape_ioctl.h> 40 41 42 MODULE_AUTHOR("Chris Rankin"); 43 MODULE_DESCRIPTION("ENSONIQ SoundScape PnP driver"); 44 MODULE_LICENSE("GPL"); 45 46 static int index[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IDX; 47 static char* id[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_STR; 48 static long port[SNDRV_CARDS] __devinitdata = { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT }; 49 static int irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ; 50 static int mpu_irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ; 51 static int dma[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_DMA; 52 53 module_param_array(index, int, NULL, 0444); 54 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard"); 55 56 module_param_array(id, charp, NULL, 0444); 57 MODULE_PARM_DESC(id, "Description for SoundScape card"); 58 59 module_param_array(port, long, NULL, 0444); 60 MODULE_PARM_DESC(port, "Port # for SoundScape driver."); 61 62 module_param_array(irq, int, NULL, 0444); 63 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver."); 64 65 module_param_array(mpu_irq, int, NULL, 0444); 66 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver."); 67 68 module_param_array(dma, int, NULL, 0444); 69 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver."); 70 71 #ifdef CONFIG_PNP 72 static int pnp_registered; 73 static struct pnp_card_device_id sscape_pnpids[] = { 74 { .id = "ENS3081", .devs = { { "ENS0000" } } }, 75 { .id = "" } /* end */ 76 }; 77 78 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids); 79 #endif 80 81 82 #define MPU401_IO(i) ((i) + 0) 83 #define MIDI_DATA_IO(i) ((i) + 0) 84 #define MIDI_CTRL_IO(i) ((i) + 1) 85 #define HOST_CTRL_IO(i) ((i) + 2) 86 #define HOST_DATA_IO(i) ((i) + 3) 87 #define ODIE_ADDR_IO(i) ((i) + 4) 88 #define ODIE_DATA_IO(i) ((i) + 5) 89 #define CODEC_IO(i) ((i) + 8) 90 91 #define IC_ODIE 1 92 #define IC_OPUS 2 93 94 #define RX_READY 0x01 95 #define TX_READY 0x02 96 97 #define CMD_ACK 0x80 98 #define CMD_SET_MIDI_VOL 0x84 99 #define CMD_GET_MIDI_VOL 0x85 100 #define CMD_XXX_MIDI_VOL 0x86 101 #define CMD_SET_EXTMIDI 0x8a 102 #define CMD_GET_EXTMIDI 0x8b 103 #define CMD_SET_MT32 0x8c 104 #define CMD_GET_MT32 0x8d 105 106 enum GA_REG { 107 GA_INTSTAT_REG = 0, 108 GA_INTENA_REG, 109 GA_DMAA_REG, 110 GA_DMAB_REG, 111 GA_INTCFG_REG, 112 GA_DMACFG_REG, 113 GA_CDCFG_REG, 114 GA_SMCFGA_REG, 115 GA_SMCFGB_REG, 116 GA_HMCTL_REG 117 }; 118 119 #define DMA_8BIT 0x80 120 121 122 #define AD1845_FREQ_SEL_MSB 0x16 123 #define AD1845_FREQ_SEL_LSB 0x17 124 125 struct soundscape { 126 spinlock_t lock; 127 unsigned io_base; 128 int codec_type; 129 int ic_type; 130 struct resource *io_res; 131 struct snd_cs4231 *chip; 132 struct snd_mpu401 *mpu; 133 struct snd_hwdep *hw; 134 135 /* 136 * The MIDI device won't work until we've loaded 137 * its firmware via a hardware-dependent device IOCTL 138 */ 139 spinlock_t fwlock; 140 int hw_in_use; 141 unsigned long midi_usage; 142 unsigned char midi_vol; 143 }; 144 145 #define INVALID_IRQ ((unsigned)-1) 146 147 148 static inline struct soundscape *get_card_soundscape(struct snd_card *c) 149 { 150 return (struct soundscape *) (c->private_data); 151 } 152 153 static inline struct soundscape *get_mpu401_soundscape(struct snd_mpu401 * mpu) 154 { 155 return (struct soundscape *) (mpu->private_data); 156 } 157 158 static inline struct soundscape *get_hwdep_soundscape(struct snd_hwdep * hw) 159 { 160 return (struct soundscape *) (hw->private_data); 161 } 162 163 164 /* 165 * Allocates some kernel memory that we can use for DMA. 166 * I think this means that the memory has to map to 167 * contiguous pages of physical memory. 168 */ 169 static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned long size) 170 { 171 if (buf) { 172 if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(), 173 size, buf) < 0) { 174 snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size); 175 return NULL; 176 } 177 } 178 179 return buf; 180 } 181 182 /* 183 * Release the DMA-able kernel memory ... 184 */ 185 static void free_dmabuf(struct snd_dma_buffer *buf) 186 { 187 if (buf && buf->area) 188 snd_dma_free_pages(buf); 189 } 190 191 192 /* 193 * This function writes to the SoundScape's control registers, 194 * but doesn't do any locking. It's up to the caller to do that. 195 * This is why this function is "unsafe" ... 196 */ 197 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg, unsigned char val) 198 { 199 outb(reg, ODIE_ADDR_IO(io_base)); 200 outb(val, ODIE_DATA_IO(io_base)); 201 } 202 203 /* 204 * Write to the SoundScape's control registers, and do the 205 * necessary locking ... 206 */ 207 static void sscape_write(struct soundscape *s, enum GA_REG reg, unsigned char val) 208 { 209 unsigned long flags; 210 211 spin_lock_irqsave(&s->lock, flags); 212 sscape_write_unsafe(s->io_base, reg, val); 213 spin_unlock_irqrestore(&s->lock, flags); 214 } 215 216 /* 217 * Read from the SoundScape's control registers, but leave any 218 * locking to the caller. This is why the function is "unsafe" ... 219 */ 220 static inline unsigned char sscape_read_unsafe(unsigned io_base, enum GA_REG reg) 221 { 222 outb(reg, ODIE_ADDR_IO(io_base)); 223 return inb(ODIE_DATA_IO(io_base)); 224 } 225 226 /* 227 * Puts the SoundScape into "host" mode, as compared to "MIDI" mode 228 */ 229 static inline void set_host_mode_unsafe(unsigned io_base) 230 { 231 outb(0x0, HOST_CTRL_IO(io_base)); 232 } 233 234 /* 235 * Puts the SoundScape into "MIDI" mode, as compared to "host" mode 236 */ 237 static inline void set_midi_mode_unsafe(unsigned io_base) 238 { 239 outb(0x3, HOST_CTRL_IO(io_base)); 240 } 241 242 /* 243 * Read the SoundScape's host-mode control register, but leave 244 * any locking issues to the caller ... 245 */ 246 static inline int host_read_unsafe(unsigned io_base) 247 { 248 int data = -1; 249 if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0) { 250 data = inb(HOST_DATA_IO(io_base)); 251 } 252 253 return data; 254 } 255 256 /* 257 * Read the SoundScape's host-mode control register, performing 258 * a limited amount of busy-waiting if the register isn't ready. 259 * Also leaves all locking-issues to the caller ... 260 */ 261 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout) 262 { 263 int data; 264 265 while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) { 266 udelay(100); 267 --timeout; 268 } /* while */ 269 270 return data; 271 } 272 273 /* 274 * Write to the SoundScape's host-mode control registers, but 275 * leave any locking issues to the caller ... 276 */ 277 static inline int host_write_unsafe(unsigned io_base, unsigned char data) 278 { 279 if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) { 280 outb(data, HOST_DATA_IO(io_base)); 281 return 1; 282 } 283 284 return 0; 285 } 286 287 /* 288 * Write to the SoundScape's host-mode control registers, performing 289 * a limited amount of busy-waiting if the register isn't ready. 290 * Also leaves all locking-issues to the caller ... 291 */ 292 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data, 293 unsigned timeout) 294 { 295 int err; 296 297 while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) { 298 udelay(100); 299 --timeout; 300 } /* while */ 301 302 return err; 303 } 304 305 306 /* 307 * Check that the MIDI subsystem is operational. If it isn't, 308 * then we will hang the computer if we try to use it ... 309 * 310 * NOTE: This check is based upon observation, not documentation. 311 */ 312 static inline int verify_mpu401(const struct snd_mpu401 * mpu) 313 { 314 return ((inb(MIDI_CTRL_IO(mpu->port)) & 0xc0) == 0x80); 315 } 316 317 /* 318 * This is apparently the standard way to initailise an MPU-401 319 */ 320 static inline void initialise_mpu401(const struct snd_mpu401 * mpu) 321 { 322 outb(0, MIDI_DATA_IO(mpu->port)); 323 } 324 325 /* 326 * Tell the SoundScape to activate the AD1845 chip (I think). 327 * The AD1845 detection fails if we *don't* do this, so I 328 * think that this is a good idea ... 329 */ 330 static inline void activate_ad1845_unsafe(unsigned io_base) 331 { 332 sscape_write_unsafe(io_base, GA_HMCTL_REG, (sscape_read_unsafe(io_base, GA_HMCTL_REG) & 0xcf) | 0x10); 333 sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80); 334 } 335 336 /* 337 * Do the necessary ALSA-level cleanup to deallocate our driver ... 338 */ 339 static void soundscape_free(struct snd_card *c) 340 { 341 register struct soundscape *sscape = get_card_soundscape(c); 342 release_and_free_resource(sscape->io_res); 343 free_dma(sscape->chip->dma1); 344 } 345 346 /* 347 * Tell the SoundScape to begin a DMA tranfer using the given channel. 348 * All locking issues are left to the caller. 349 */ 350 static inline void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg) 351 { 352 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) | 0x01); 353 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) & 0xfe); 354 } 355 356 /* 357 * Wait for a DMA transfer to complete. This is a "limited busy-wait", 358 * and all locking issues are left to the caller. 359 */ 360 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg, unsigned timeout) 361 { 362 while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) { 363 udelay(100); 364 --timeout; 365 } /* while */ 366 367 return (sscape_read_unsafe(io_base, reg) & 0x01); 368 } 369 370 /* 371 * Wait for the On-Board Processor to return its start-up 372 * acknowledgement sequence. This wait is too long for 373 * us to perform "busy-waiting", and so we must sleep. 374 * This in turn means that we must not be holding any 375 * spinlocks when we call this function. 376 */ 377 static int obp_startup_ack(struct soundscape *s, unsigned timeout) 378 { 379 while (timeout != 0) { 380 unsigned long flags; 381 unsigned char x; 382 383 schedule_timeout_interruptible(1); 384 385 spin_lock_irqsave(&s->lock, flags); 386 x = inb(HOST_DATA_IO(s->io_base)); 387 spin_unlock_irqrestore(&s->lock, flags); 388 if ((x & 0xfe) == 0xfe) 389 return 1; 390 391 --timeout; 392 } /* while */ 393 394 return 0; 395 } 396 397 /* 398 * Wait for the host to return its start-up acknowledgement 399 * sequence. This wait is too long for us to perform 400 * "busy-waiting", and so we must sleep. This in turn means 401 * that we must not be holding any spinlocks when we call 402 * this function. 403 */ 404 static int host_startup_ack(struct soundscape *s, unsigned timeout) 405 { 406 while (timeout != 0) { 407 unsigned long flags; 408 unsigned char x; 409 410 schedule_timeout_interruptible(1); 411 412 spin_lock_irqsave(&s->lock, flags); 413 x = inb(HOST_DATA_IO(s->io_base)); 414 spin_unlock_irqrestore(&s->lock, flags); 415 if (x == 0xfe) 416 return 1; 417 418 --timeout; 419 } /* while */ 420 421 return 0; 422 } 423 424 /* 425 * Upload a byte-stream into the SoundScape using DMA channel A. 426 */ 427 static int upload_dma_data(struct soundscape *s, 428 const unsigned char __user *data, 429 size_t size) 430 { 431 unsigned long flags; 432 struct snd_dma_buffer dma; 433 int ret; 434 435 if (!get_dmabuf(&dma, PAGE_ALIGN(size))) 436 return -ENOMEM; 437 438 spin_lock_irqsave(&s->lock, flags); 439 440 /* 441 * Reset the board ... 442 */ 443 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f); 444 445 /* 446 * Enable the DMA channels and configure them ... 447 */ 448 sscape_write_unsafe(s->io_base, GA_DMACFG_REG, 0x50); 449 sscape_write_unsafe(s->io_base, GA_DMAA_REG, (s->chip->dma1 << 4) | DMA_8BIT); 450 sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20); 451 452 /* 453 * Take the board out of reset ... 454 */ 455 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x80); 456 457 /* 458 * Upload the user's data (firmware?) to the SoundScape 459 * board through the DMA channel ... 460 */ 461 while (size != 0) { 462 unsigned long len; 463 464 /* 465 * Apparently, copying to/from userspace can sleep. 466 * We are therefore forbidden from holding any 467 * spinlocks while we copy ... 468 */ 469 spin_unlock_irqrestore(&s->lock, flags); 470 471 /* 472 * Remember that the data that we want to DMA 473 * comes from USERSPACE. We have already verified 474 * the userspace pointer ... 475 */ 476 len = min(size, dma.bytes); 477 len -= __copy_from_user(dma.area, data, len); 478 data += len; 479 size -= len; 480 481 /* 482 * Grab that spinlock again, now that we've 483 * finished copying! 484 */ 485 spin_lock_irqsave(&s->lock, flags); 486 487 snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE); 488 sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG); 489 if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) { 490 /* 491 * Don't forget to release this spinlock we're holding ... 492 */ 493 spin_unlock_irqrestore(&s->lock, flags); 494 495 snd_printk(KERN_ERR "sscape: DMA upload has timed out\n"); 496 ret = -EAGAIN; 497 goto _release_dma; 498 } 499 } /* while */ 500 501 set_host_mode_unsafe(s->io_base); 502 503 /* 504 * Boot the board ... (I think) 505 */ 506 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x40); 507 spin_unlock_irqrestore(&s->lock, flags); 508 509 /* 510 * If all has gone well, then the board should acknowledge 511 * the new upload and tell us that it has rebooted OK. We 512 * give it 5 seconds (max) ... 513 */ 514 ret = 0; 515 if (!obp_startup_ack(s, 5)) { 516 snd_printk(KERN_ERR "sscape: No response from on-board processor after upload\n"); 517 ret = -EAGAIN; 518 } else if (!host_startup_ack(s, 5)) { 519 snd_printk(KERN_ERR "sscape: SoundScape failed to initialise\n"); 520 ret = -EAGAIN; 521 } 522 523 _release_dma: 524 /* 525 * NOTE!!! We are NOT holding any spinlocks at this point !!! 526 */ 527 sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_ODIE ? 0x70 : 0x40)); 528 free_dmabuf(&dma); 529 530 return ret; 531 } 532 533 /* 534 * Upload the bootblock(?) into the SoundScape. The only 535 * purpose of this block of code seems to be to tell 536 * us which version of the microcode we should be using. 537 * 538 * NOTE: The boot-block data resides in USER-SPACE!!! 539 * However, we have already verified its memory 540 * addresses by the time we get here. 541 */ 542 static int sscape_upload_bootblock(struct soundscape *sscape, struct sscape_bootblock __user *bb) 543 { 544 unsigned long flags; 545 int data = 0; 546 int ret; 547 548 ret = upload_dma_data(sscape, bb->code, sizeof(bb->code)); 549 550 spin_lock_irqsave(&sscape->lock, flags); 551 if (ret == 0) { 552 data = host_read_ctrl_unsafe(sscape->io_base, 100); 553 } 554 set_midi_mode_unsafe(sscape->io_base); 555 spin_unlock_irqrestore(&sscape->lock, flags); 556 557 if (ret == 0) { 558 if (data < 0) { 559 snd_printk(KERN_ERR "sscape: timeout reading firmware version\n"); 560 ret = -EAGAIN; 561 } 562 else if (__copy_to_user(&bb->version, &data, sizeof(bb->version))) { 563 ret = -EFAULT; 564 } 565 } 566 567 return ret; 568 } 569 570 /* 571 * Upload the microcode into the SoundScape. The 572 * microcode is 64K of data, and if we try to copy 573 * it into a local variable then we will SMASH THE 574 * KERNEL'S STACK! We therefore leave it in USER 575 * SPACE, and save ourselves from copying it at all. 576 */ 577 static int sscape_upload_microcode(struct soundscape *sscape, 578 const struct sscape_microcode __user *mc) 579 { 580 unsigned long flags; 581 char __user *code; 582 int err; 583 584 /* 585 * We are going to have to copy this data into a special 586 * DMA-able buffer before we can upload it. We shall therefore 587 * just check that the data pointer is valid for now. 588 * 589 * NOTE: This buffer is 64K long! That's WAY too big to 590 * copy into a stack-temporary anyway. 591 */ 592 if ( get_user(code, &mc->code) || 593 !access_ok(VERIFY_READ, code, SSCAPE_MICROCODE_SIZE) ) 594 return -EFAULT; 595 596 if ((err = upload_dma_data(sscape, code, SSCAPE_MICROCODE_SIZE)) == 0) { 597 snd_printk(KERN_INFO "sscape: MIDI firmware loaded\n"); 598 } 599 600 spin_lock_irqsave(&sscape->lock, flags); 601 set_midi_mode_unsafe(sscape->io_base); 602 spin_unlock_irqrestore(&sscape->lock, flags); 603 604 initialise_mpu401(sscape->mpu); 605 606 return err; 607 } 608 609 /* 610 * Hardware-specific device functions, to implement special 611 * IOCTLs for the SoundScape card. This is how we upload 612 * the microcode into the card, for example, and so we 613 * must ensure that no two processes can open this device 614 * simultaneously, and that we can't open it at all if 615 * someone is using the MIDI device. 616 */ 617 static int sscape_hw_open(struct snd_hwdep * hw, struct file *file) 618 { 619 register struct soundscape *sscape = get_hwdep_soundscape(hw); 620 unsigned long flags; 621 int err; 622 623 spin_lock_irqsave(&sscape->fwlock, flags); 624 625 if ((sscape->midi_usage != 0) || sscape->hw_in_use) { 626 err = -EBUSY; 627 } else { 628 sscape->hw_in_use = 1; 629 err = 0; 630 } 631 632 spin_unlock_irqrestore(&sscape->fwlock, flags); 633 return err; 634 } 635 636 static int sscape_hw_release(struct snd_hwdep * hw, struct file *file) 637 { 638 register struct soundscape *sscape = get_hwdep_soundscape(hw); 639 unsigned long flags; 640 641 spin_lock_irqsave(&sscape->fwlock, flags); 642 sscape->hw_in_use = 0; 643 spin_unlock_irqrestore(&sscape->fwlock, flags); 644 return 0; 645 } 646 647 static int sscape_hw_ioctl(struct snd_hwdep * hw, struct file *file, 648 unsigned int cmd, unsigned long arg) 649 { 650 struct soundscape *sscape = get_hwdep_soundscape(hw); 651 int err = -EBUSY; 652 653 switch (cmd) { 654 case SND_SSCAPE_LOAD_BOOTB: 655 { 656 register struct sscape_bootblock __user *bb = (struct sscape_bootblock __user *) arg; 657 658 /* 659 * We are going to have to copy this data into a special 660 * DMA-able buffer before we can upload it. We shall therefore 661 * just check that the data pointer is valid for now ... 662 */ 663 if ( !access_ok(VERIFY_READ, bb->code, sizeof(bb->code)) ) 664 return -EFAULT; 665 666 /* 667 * Now check that we can write the firmware version number too... 668 */ 669 if ( !access_ok(VERIFY_WRITE, &bb->version, sizeof(bb->version)) ) 670 return -EFAULT; 671 672 err = sscape_upload_bootblock(sscape, bb); 673 } 674 break; 675 676 case SND_SSCAPE_LOAD_MCODE: 677 { 678 register const struct sscape_microcode __user *mc = (const struct sscape_microcode __user *) arg; 679 680 err = sscape_upload_microcode(sscape, mc); 681 } 682 break; 683 684 default: 685 err = -EINVAL; 686 break; 687 } /* switch */ 688 689 return err; 690 } 691 692 693 /* 694 * Mixer control for the SoundScape's MIDI device. 695 */ 696 static int sscape_midi_info(struct snd_kcontrol *ctl, 697 struct snd_ctl_elem_info *uinfo) 698 { 699 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 700 uinfo->count = 1; 701 uinfo->value.integer.min = 0; 702 uinfo->value.integer.max = 127; 703 return 0; 704 } 705 706 static int sscape_midi_get(struct snd_kcontrol *kctl, 707 struct snd_ctl_elem_value *uctl) 708 { 709 struct snd_cs4231 *chip = snd_kcontrol_chip(kctl); 710 struct snd_card *card = chip->card; 711 register struct soundscape *s = get_card_soundscape(card); 712 unsigned long flags; 713 714 spin_lock_irqsave(&s->lock, flags); 715 set_host_mode_unsafe(s->io_base); 716 717 if (host_write_ctrl_unsafe(s->io_base, CMD_GET_MIDI_VOL, 100)) { 718 uctl->value.integer.value[0] = host_read_ctrl_unsafe(s->io_base, 100); 719 } 720 721 set_midi_mode_unsafe(s->io_base); 722 spin_unlock_irqrestore(&s->lock, flags); 723 return 0; 724 } 725 726 static int sscape_midi_put(struct snd_kcontrol *kctl, 727 struct snd_ctl_elem_value *uctl) 728 { 729 struct snd_cs4231 *chip = snd_kcontrol_chip(kctl); 730 struct snd_card *card = chip->card; 731 register struct soundscape *s = get_card_soundscape(card); 732 unsigned long flags; 733 int change; 734 735 spin_lock_irqsave(&s->lock, flags); 736 737 /* 738 * We need to put the board into HOST mode before we 739 * can send any volume-changing HOST commands ... 740 */ 741 set_host_mode_unsafe(s->io_base); 742 743 /* 744 * To successfully change the MIDI volume setting, you seem to 745 * have to write a volume command, write the new volume value, 746 * and then perform another volume-related command. Perhaps the 747 * first command is an "open" and the second command is a "close"? 748 */ 749 if (s->midi_vol == ((unsigned char) uctl->value.integer. value[0] & 127)) { 750 change = 0; 751 goto __skip_change; 752 } 753 change = (host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100) 754 && host_write_ctrl_unsafe(s->io_base, ((unsigned char) uctl->value.integer. value[0]) & 127, 100) 755 && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100)); 756 __skip_change: 757 758 /* 759 * Take the board out of HOST mode and back into MIDI mode ... 760 */ 761 set_midi_mode_unsafe(s->io_base); 762 763 spin_unlock_irqrestore(&s->lock, flags); 764 return change; 765 } 766 767 static struct snd_kcontrol_new midi_mixer_ctl = { 768 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 769 .name = "MIDI", 770 .info = sscape_midi_info, 771 .get = sscape_midi_get, 772 .put = sscape_midi_put 773 }; 774 775 /* 776 * The SoundScape can use two IRQs from a possible set of four. 777 * These IRQs are encoded as bit patterns so that they can be 778 * written to the control registers. 779 */ 780 static unsigned __devinit get_irq_config(int irq) 781 { 782 static const int valid_irq[] = { 9, 5, 7, 10 }; 783 unsigned cfg; 784 785 for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg) { 786 if (irq == valid_irq[cfg]) 787 return cfg; 788 } /* for */ 789 790 return INVALID_IRQ; 791 } 792 793 794 /* 795 * Perform certain arcane port-checks to see whether there 796 * is a SoundScape board lurking behind the given ports. 797 */ 798 static int __devinit detect_sscape(struct soundscape *s) 799 { 800 unsigned long flags; 801 unsigned d; 802 int retval = 0; 803 804 spin_lock_irqsave(&s->lock, flags); 805 806 /* 807 * The following code is lifted from the original OSS driver, 808 * and as I don't have a datasheet I cannot really comment 809 * on what it is doing... 810 */ 811 if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0) 812 goto _done; 813 814 d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0; 815 if ((d & 0x80) != 0) 816 goto _done; 817 818 if (d == 0) { 819 s->codec_type = 1; 820 s->ic_type = IC_ODIE; 821 } else if ((d & 0x60) != 0) { 822 s->codec_type = 2; 823 s->ic_type = IC_OPUS; 824 } else 825 goto _done; 826 827 outb(0xfa, ODIE_ADDR_IO(s->io_base)); 828 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a) 829 goto _done; 830 831 outb(0xfe, ODIE_ADDR_IO(s->io_base)); 832 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e) 833 goto _done; 834 if ((inb(ODIE_DATA_IO(s->io_base)) & 0x9f) != 0x0e) 835 goto _done; 836 837 /* 838 * SoundScape successfully detected! 839 */ 840 retval = 1; 841 842 _done: 843 spin_unlock_irqrestore(&s->lock, flags); 844 return retval; 845 } 846 847 /* 848 * ALSA callback function, called when attempting to open the MIDI device. 849 * Check that the MIDI firmware has been loaded, because we don't want 850 * to crash the machine. Also check that someone isn't using the hardware 851 * IOCTL device. 852 */ 853 static int mpu401_open(struct snd_mpu401 * mpu) 854 { 855 int err; 856 857 if (!verify_mpu401(mpu)) { 858 snd_printk(KERN_ERR "sscape: MIDI disabled, please load firmware\n"); 859 err = -ENODEV; 860 } else { 861 register struct soundscape *sscape = get_mpu401_soundscape(mpu); 862 unsigned long flags; 863 864 spin_lock_irqsave(&sscape->fwlock, flags); 865 866 if (sscape->hw_in_use || (sscape->midi_usage == ULONG_MAX)) { 867 err = -EBUSY; 868 } else { 869 ++(sscape->midi_usage); 870 err = 0; 871 } 872 873 spin_unlock_irqrestore(&sscape->fwlock, flags); 874 } 875 876 return err; 877 } 878 879 static void mpu401_close(struct snd_mpu401 * mpu) 880 { 881 register struct soundscape *sscape = get_mpu401_soundscape(mpu); 882 unsigned long flags; 883 884 spin_lock_irqsave(&sscape->fwlock, flags); 885 --(sscape->midi_usage); 886 spin_unlock_irqrestore(&sscape->fwlock, flags); 887 } 888 889 /* 890 * Initialse an MPU-401 subdevice for MIDI support on the SoundScape. 891 */ 892 static int __devinit create_mpu401(struct snd_card *card, int devnum, unsigned long port, int irq) 893 { 894 struct soundscape *sscape = get_card_soundscape(card); 895 struct snd_rawmidi *rawmidi; 896 int err; 897 898 if ((err = snd_mpu401_uart_new(card, devnum, 899 MPU401_HW_MPU401, 900 port, MPU401_INFO_INTEGRATED, 901 irq, IRQF_DISABLED, 902 &rawmidi)) == 0) { 903 struct snd_mpu401 *mpu = (struct snd_mpu401 *) rawmidi->private_data; 904 mpu->open_input = mpu401_open; 905 mpu->open_output = mpu401_open; 906 mpu->close_input = mpu401_close; 907 mpu->close_output = mpu401_close; 908 mpu->private_data = sscape; 909 sscape->mpu = mpu; 910 911 initialise_mpu401(mpu); 912 } 913 914 return err; 915 } 916 917 918 /* 919 * Override for the CS4231 playback format function. 920 * The AD1845 has much simpler format and rate selection. 921 */ 922 static void ad1845_playback_format(struct snd_cs4231 * chip, struct snd_pcm_hw_params *params, unsigned char format) 923 { 924 unsigned long flags; 925 unsigned rate = params_rate(params); 926 927 /* 928 * The AD1845 can't handle sample frequencies 929 * outside of 4 kHZ to 50 kHZ 930 */ 931 if (rate > 50000) 932 rate = 50000; 933 else if (rate < 4000) 934 rate = 4000; 935 936 spin_lock_irqsave(&chip->reg_lock, flags); 937 938 /* 939 * Program the AD1845 correctly for the playback stream. 940 * Note that we do NOT need to toggle the MCE bit because 941 * the PLAYBACK_ENABLE bit of the Interface Configuration 942 * register is set. 943 * 944 * NOTE: We seem to need to write to the MSB before the LSB 945 * to get the correct sample frequency. 946 */ 947 snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, (format & 0xf0)); 948 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8)); 949 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate); 950 951 spin_unlock_irqrestore(&chip->reg_lock, flags); 952 } 953 954 /* 955 * Override for the CS4231 capture format function. 956 * The AD1845 has much simpler format and rate selection. 957 */ 958 static void ad1845_capture_format(struct snd_cs4231 * chip, struct snd_pcm_hw_params *params, unsigned char format) 959 { 960 unsigned long flags; 961 unsigned rate = params_rate(params); 962 963 /* 964 * The AD1845 can't handle sample frequencies 965 * outside of 4 kHZ to 50 kHZ 966 */ 967 if (rate > 50000) 968 rate = 50000; 969 else if (rate < 4000) 970 rate = 4000; 971 972 spin_lock_irqsave(&chip->reg_lock, flags); 973 974 /* 975 * Program the AD1845 correctly for the playback stream. 976 * Note that we do NOT need to toggle the MCE bit because 977 * the CAPTURE_ENABLE bit of the Interface Configuration 978 * register is set. 979 * 980 * NOTE: We seem to need to write to the MSB before the LSB 981 * to get the correct sample frequency. 982 */ 983 snd_cs4231_out(chip, CS4231_REC_FORMAT, (format & 0xf0)); 984 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8)); 985 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate); 986 987 spin_unlock_irqrestore(&chip->reg_lock, flags); 988 } 989 990 /* 991 * Create an AD1845 PCM subdevice on the SoundScape. The AD1845 992 * is very much like a CS4231, with a few extra bits. We will 993 * try to support at least some of the extra bits by overriding 994 * some of the CS4231 callback. 995 */ 996 static int __devinit create_ad1845(struct snd_card *card, unsigned port, int irq, int dma1) 997 { 998 register struct soundscape *sscape = get_card_soundscape(card); 999 struct snd_cs4231 *chip; 1000 int err; 1001 1002 #define CS4231_SHARE_HARDWARE (CS4231_HWSHARE_DMA1 | CS4231_HWSHARE_DMA2) 1003 /* 1004 * The AD1845 PCM device is only half-duplex, and so 1005 * we only give it one DMA channel ... 1006 */ 1007 if ((err = snd_cs4231_create(card, 1008 port, -1, irq, dma1, dma1, 1009 CS4231_HW_DETECT, 1010 CS4231_HWSHARE_DMA1, &chip)) == 0) { 1011 unsigned long flags; 1012 struct snd_pcm *pcm; 1013 1014 #define AD1845_FREQ_SEL_ENABLE 0x08 1015 1016 #define AD1845_PWR_DOWN_CTRL 0x1b 1017 #define AD1845_CRYS_CLOCK_SEL 0x1d 1018 1019 /* 1020 * It turns out that the PLAYBACK_ENABLE bit is set 1021 * by the lowlevel driver ... 1022 * 1023 #define AD1845_IFACE_CONFIG \ 1024 (CS4231_AUTOCALIB | CS4231_RECORD_ENABLE | CS4231_PLAYBACK_ENABLE) 1025 snd_cs4231_mce_up(chip); 1026 spin_lock_irqsave(&chip->reg_lock, flags); 1027 snd_cs4231_out(chip, CS4231_IFACE_CTRL, AD1845_IFACE_CONFIG); 1028 spin_unlock_irqrestore(&chip->reg_lock, flags); 1029 snd_cs4231_mce_down(chip); 1030 */ 1031 1032 /* 1033 * The input clock frequency on the SoundScape must 1034 * be 14.31818 MHz, because we must set this register 1035 * to get the playback to sound correct ... 1036 */ 1037 snd_cs4231_mce_up(chip); 1038 spin_lock_irqsave(&chip->reg_lock, flags); 1039 snd_cs4231_out(chip, AD1845_CRYS_CLOCK_SEL, 0x20); 1040 spin_unlock_irqrestore(&chip->reg_lock, flags); 1041 snd_cs4231_mce_down(chip); 1042 1043 /* 1044 * More custom configuration: 1045 * a) select "mode 2", and provide a current drive of 8 mA 1046 * b) enable frequency selection (for capture/playback) 1047 */ 1048 spin_lock_irqsave(&chip->reg_lock, flags); 1049 snd_cs4231_out(chip, CS4231_MISC_INFO, (CS4231_MODE2 | 0x10)); 1050 snd_cs4231_out(chip, AD1845_PWR_DOWN_CTRL, snd_cs4231_in(chip, AD1845_PWR_DOWN_CTRL) | AD1845_FREQ_SEL_ENABLE); 1051 spin_unlock_irqrestore(&chip->reg_lock, flags); 1052 1053 if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0) { 1054 snd_printk(KERN_ERR "sscape: No PCM device for AD1845 chip\n"); 1055 goto _error; 1056 } 1057 1058 if ((err = snd_cs4231_mixer(chip)) < 0) { 1059 snd_printk(KERN_ERR "sscape: No mixer device for AD1845 chip\n"); 1060 goto _error; 1061 } 1062 1063 if ((err = snd_ctl_add(card, snd_ctl_new1(&midi_mixer_ctl, chip))) < 0) { 1064 snd_printk(KERN_ERR "sscape: Could not create MIDI mixer control\n"); 1065 goto _error; 1066 } 1067 1068 strcpy(card->driver, "SoundScape"); 1069 strcpy(card->shortname, pcm->name); 1070 snprintf(card->longname, sizeof(card->longname), 1071 "%s at 0x%lx, IRQ %d, DMA %d\n", 1072 pcm->name, chip->port, chip->irq, chip->dma1); 1073 chip->set_playback_format = ad1845_playback_format; 1074 chip->set_capture_format = ad1845_capture_format; 1075 sscape->chip = chip; 1076 } 1077 1078 _error: 1079 return err; 1080 } 1081 1082 1083 /* 1084 * Create an ALSA soundcard entry for the SoundScape, using 1085 * the given list of port, IRQ and DMA resources. 1086 */ 1087 static int __devinit create_sscape(int dev, struct snd_card **rcardp) 1088 { 1089 struct snd_card *card; 1090 register struct soundscape *sscape; 1091 register unsigned dma_cfg; 1092 unsigned irq_cfg; 1093 unsigned mpu_irq_cfg; 1094 unsigned xport; 1095 struct resource *io_res; 1096 unsigned long flags; 1097 int err; 1098 1099 /* 1100 * Check that the user didn't pass us garbage data ... 1101 */ 1102 irq_cfg = get_irq_config(irq[dev]); 1103 if (irq_cfg == INVALID_IRQ) { 1104 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]); 1105 return -ENXIO; 1106 } 1107 1108 mpu_irq_cfg = get_irq_config(mpu_irq[dev]); 1109 if (mpu_irq_cfg == INVALID_IRQ) { 1110 printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]); 1111 return -ENXIO; 1112 } 1113 xport = port[dev]; 1114 1115 /* 1116 * Grab IO ports that we will need to probe so that we 1117 * can detect and control this hardware ... 1118 */ 1119 if ((io_res = request_region(xport, 8, "SoundScape")) == NULL) { 1120 snd_printk(KERN_ERR "sscape: can't grab port 0x%x\n", xport); 1121 return -EBUSY; 1122 } 1123 1124 /* 1125 * Grab both DMA channels (OK, only one for now) ... 1126 */ 1127 if ((err = request_dma(dma[dev], "SoundScape")) < 0) { 1128 snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]); 1129 goto _release_region; 1130 } 1131 1132 /* 1133 * Create a new ALSA sound card entry, in anticipation 1134 * of detecting our hardware ... 1135 */ 1136 if ((card = snd_card_new(index[dev], id[dev], THIS_MODULE, 1137 sizeof(struct soundscape))) == NULL) { 1138 err = -ENOMEM; 1139 goto _release_dma; 1140 } 1141 1142 sscape = get_card_soundscape(card); 1143 spin_lock_init(&sscape->lock); 1144 spin_lock_init(&sscape->fwlock); 1145 sscape->io_res = io_res; 1146 sscape->io_base = xport; 1147 1148 if (!detect_sscape(sscape)) { 1149 printk(KERN_ERR "sscape: hardware not detected at 0x%x\n", sscape->io_base); 1150 err = -ENODEV; 1151 goto _release_card; 1152 } 1153 1154 printk(KERN_INFO "sscape: hardware detected at 0x%x, using IRQ %d, DMA %d\n", 1155 sscape->io_base, irq[dev], dma[dev]); 1156 1157 /* 1158 * Now create the hardware-specific device so that we can 1159 * load the microcode into the on-board processor. 1160 * We cannot use the MPU-401 MIDI system until this firmware 1161 * has been loaded into the card. 1162 */ 1163 if ((err = snd_hwdep_new(card, "MC68EC000", 0, &(sscape->hw))) < 0) { 1164 printk(KERN_ERR "sscape: Failed to create firmware device\n"); 1165 goto _release_card; 1166 } 1167 strlcpy(sscape->hw->name, "SoundScape M68K", sizeof(sscape->hw->name)); 1168 sscape->hw->name[sizeof(sscape->hw->name) - 1] = '\0'; 1169 sscape->hw->iface = SNDRV_HWDEP_IFACE_SSCAPE; 1170 sscape->hw->ops.open = sscape_hw_open; 1171 sscape->hw->ops.release = sscape_hw_release; 1172 sscape->hw->ops.ioctl = sscape_hw_ioctl; 1173 sscape->hw->private_data = sscape; 1174 1175 /* 1176 * Tell the on-board devices where their resources are (I think - 1177 * I can't be sure without a datasheet ... So many magic values!) 1178 */ 1179 spin_lock_irqsave(&sscape->lock, flags); 1180 1181 activate_ad1845_unsafe(sscape->io_base); 1182 1183 sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x00); /* disable */ 1184 sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e); 1185 sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00); 1186 1187 /* 1188 * Enable and configure the DMA channels ... 1189 */ 1190 sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50); 1191 dma_cfg = (sscape->ic_type == IC_ODIE ? 0x70 : 0x40); 1192 sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg); 1193 sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20); 1194 1195 sscape_write_unsafe(sscape->io_base, 1196 GA_INTCFG_REG, 0xf0 | (mpu_irq_cfg << 2) | mpu_irq_cfg); 1197 sscape_write_unsafe(sscape->io_base, 1198 GA_CDCFG_REG, 0x09 | DMA_8BIT | (dma[dev] << 4) | (irq_cfg << 1)); 1199 1200 spin_unlock_irqrestore(&sscape->lock, flags); 1201 1202 /* 1203 * We have now enabled the codec chip, and so we should 1204 * detect the AD1845 device ... 1205 */ 1206 if ((err = create_ad1845(card, CODEC_IO(xport), irq[dev], dma[dev])) < 0) { 1207 printk(KERN_ERR "sscape: No AD1845 device at 0x%x, IRQ %d\n", 1208 CODEC_IO(xport), irq[dev]); 1209 goto _release_card; 1210 } 1211 #define MIDI_DEVNUM 0 1212 if ((err = create_mpu401(card, MIDI_DEVNUM, MPU401_IO(xport), mpu_irq[dev])) < 0) { 1213 printk(KERN_ERR "sscape: Failed to create MPU-401 device at 0x%x\n", 1214 MPU401_IO(xport)); 1215 goto _release_card; 1216 } 1217 1218 /* 1219 * Enable the master IRQ ... 1220 */ 1221 sscape_write(sscape, GA_INTENA_REG, 0x80); 1222 1223 /* 1224 * Initialize mixer 1225 */ 1226 sscape->midi_vol = 0; 1227 host_write_ctrl_unsafe(sscape->io_base, CMD_SET_MIDI_VOL, 100); 1228 host_write_ctrl_unsafe(sscape->io_base, 0, 100); 1229 host_write_ctrl_unsafe(sscape->io_base, CMD_XXX_MIDI_VOL, 100); 1230 1231 /* 1232 * Now that we have successfully created this sound card, 1233 * it is safe to store the pointer. 1234 * NOTE: we only register the sound card's "destructor" 1235 * function now that our "constructor" has completed. 1236 */ 1237 card->private_free = soundscape_free; 1238 *rcardp = card; 1239 1240 return 0; 1241 1242 _release_card: 1243 snd_card_free(card); 1244 1245 _release_dma: 1246 free_dma(dma[dev]); 1247 1248 _release_region: 1249 release_and_free_resource(io_res); 1250 1251 return err; 1252 } 1253 1254 1255 static int __devinit snd_sscape_match(struct device *pdev, unsigned int i) 1256 { 1257 /* 1258 * Make sure we were given ALL of the other parameters. 1259 */ 1260 if (port[i] == SNDRV_AUTO_PORT) 1261 return 0; 1262 1263 if (irq[i] == SNDRV_AUTO_IRQ || 1264 mpu_irq[i] == SNDRV_AUTO_IRQ || 1265 dma[i] == SNDRV_AUTO_DMA) { 1266 printk(KERN_INFO 1267 "sscape: insufficient parameters, need IO, IRQ, MPU-IRQ and DMA\n"); 1268 return 0; 1269 } 1270 1271 return 1; 1272 } 1273 1274 static int __devinit snd_sscape_probe(struct device *pdev, unsigned int dev) 1275 { 1276 struct snd_card *card; 1277 int ret; 1278 1279 dma[dev] &= 0x03; 1280 ret = create_sscape(dev, &card); 1281 if (ret < 0) 1282 return ret; 1283 snd_card_set_dev(card, pdev); 1284 if ((ret = snd_card_register(card)) < 0) { 1285 printk(KERN_ERR "sscape: Failed to register sound card\n"); 1286 return ret; 1287 } 1288 dev_set_drvdata(pdev, card); 1289 return 0; 1290 } 1291 1292 static int __devexit snd_sscape_remove(struct device *devptr, unsigned int dev) 1293 { 1294 snd_card_free(dev_get_drvdata(devptr)); 1295 dev_set_drvdata(devptr, NULL); 1296 return 0; 1297 } 1298 1299 #define DEV_NAME "sscape" 1300 1301 static struct isa_driver snd_sscape_driver = { 1302 .match = snd_sscape_match, 1303 .probe = snd_sscape_probe, 1304 .remove = __devexit_p(snd_sscape_remove), 1305 /* FIXME: suspend/resume */ 1306 .driver = { 1307 .name = DEV_NAME 1308 }, 1309 }; 1310 1311 #ifdef CONFIG_PNP 1312 static inline int __devinit get_next_autoindex(int i) 1313 { 1314 while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT) 1315 ++i; 1316 return i; 1317 } 1318 1319 1320 static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard, 1321 const struct pnp_card_device_id *pid) 1322 { 1323 static int idx = 0; 1324 struct pnp_dev *dev; 1325 struct snd_card *card; 1326 int ret; 1327 1328 /* 1329 * Allow this function to fail *quietly* if all the ISA PnP 1330 * devices were configured using module parameters instead. 1331 */ 1332 if ((idx = get_next_autoindex(idx)) >= SNDRV_CARDS) 1333 return -ENOSPC; 1334 1335 /* 1336 * We have found a candidate ISA PnP card. Now we 1337 * have to check that it has the devices that we 1338 * expect it to have. 1339 * 1340 * We will NOT try and autoconfigure all of the resources 1341 * needed and then activate the card as we are assuming that 1342 * has already been done at boot-time using /proc/isapnp. 1343 * We shall simply try to give each active card the resources 1344 * that it wants. This is a sensible strategy for a modular 1345 * system where unused modules are unloaded regularly. 1346 * 1347 * This strategy is utterly useless if we compile the driver 1348 * into the kernel, of course. 1349 */ 1350 // printk(KERN_INFO "sscape: %s\n", card->name); 1351 1352 /* 1353 * Check that we still have room for another sound card ... 1354 */ 1355 dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL); 1356 if (! dev) 1357 return -ENODEV; 1358 1359 if (!pnp_is_active(dev)) { 1360 if (pnp_activate_dev(dev) < 0) { 1361 printk(KERN_INFO "sscape: device is inactive\n"); 1362 return -EBUSY; 1363 } 1364 } 1365 1366 /* 1367 * Read the correct parameters off the ISA PnP bus ... 1368 */ 1369 port[idx] = pnp_port_start(dev, 0); 1370 irq[idx] = pnp_irq(dev, 0); 1371 mpu_irq[idx] = pnp_irq(dev, 1); 1372 dma[idx] = pnp_dma(dev, 0) & 0x03; 1373 1374 ret = create_sscape(idx, &card); 1375 if (ret < 0) 1376 return ret; 1377 snd_card_set_dev(card, &pcard->card->dev); 1378 if ((ret = snd_card_register(card)) < 0) { 1379 printk(KERN_ERR "sscape: Failed to register sound card\n"); 1380 snd_card_free(card); 1381 return ret; 1382 } 1383 1384 pnp_set_card_drvdata(pcard, card); 1385 ++idx; 1386 1387 return ret; 1388 } 1389 1390 static void __devexit sscape_pnp_remove(struct pnp_card_link * pcard) 1391 { 1392 snd_card_free(pnp_get_card_drvdata(pcard)); 1393 pnp_set_card_drvdata(pcard, NULL); 1394 } 1395 1396 static struct pnp_card_driver sscape_pnpc_driver = { 1397 .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, 1398 .name = "sscape", 1399 .id_table = sscape_pnpids, 1400 .probe = sscape_pnp_detect, 1401 .remove = __devexit_p(sscape_pnp_remove), 1402 }; 1403 1404 #endif /* CONFIG_PNP */ 1405 1406 static int __init sscape_init(void) 1407 { 1408 int ret; 1409 1410 /* 1411 * First check whether we were passed any parameters. 1412 * These MUST take precedence over ANY automatic way 1413 * of allocating cards, because the operator is 1414 * S-P-E-L-L-I-N-G it out for us... 1415 */ 1416 ret = isa_register_driver(&snd_sscape_driver, SNDRV_CARDS); 1417 if (ret < 0) 1418 return ret; 1419 #ifdef CONFIG_PNP 1420 if (pnp_register_card_driver(&sscape_pnpc_driver) == 0) 1421 pnp_registered = 1; 1422 #endif 1423 return 0; 1424 } 1425 1426 static void __exit sscape_exit(void) 1427 { 1428 #ifdef CONFIG_PNP 1429 if (pnp_registered) 1430 pnp_unregister_card_driver(&sscape_pnpc_driver); 1431 #endif 1432 isa_unregister_driver(&snd_sscape_driver); 1433 } 1434 1435 module_init(sscape_init); 1436 module_exit(sscape_exit); 1437