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/delay.h> 27 #include <linux/pnp.h> 28 #include <linux/spinlock.h> 29 #include <linux/moduleparam.h> 30 #include <asm/dma.h> 31 #include <sound/core.h> 32 #include <sound/hwdep.h> 33 #include <sound/cs4231.h> 34 #include <sound/mpu401.h> 35 #include <sound/initval.h> 36 37 #include <sound/sscape_ioctl.h> 38 39 40 MODULE_AUTHOR("Chris Rankin"); 41 MODULE_DESCRIPTION("ENSONIQ SoundScape PnP driver"); 42 MODULE_LICENSE("GPL"); 43 44 static int index[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IDX; 45 static char* id[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_STR; 46 static long port[SNDRV_CARDS] __devinitdata = { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT }; 47 static int irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ; 48 static int mpu_irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ; 49 static int dma[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_DMA; 50 51 module_param_array(index, int, NULL, 0444); 52 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard"); 53 54 module_param_array(id, charp, NULL, 0444); 55 MODULE_PARM_DESC(id, "Description for SoundScape card"); 56 57 module_param_array(port, long, NULL, 0444); 58 MODULE_PARM_DESC(port, "Port # for SoundScape driver."); 59 60 module_param_array(irq, int, NULL, 0444); 61 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver."); 62 63 module_param_array(mpu_irq, int, NULL, 0444); 64 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver."); 65 66 module_param_array(dma, int, NULL, 0444); 67 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver."); 68 69 #ifdef CONFIG_PNP 70 static struct pnp_card_device_id sscape_pnpids[] = { 71 { .id = "ENS3081", .devs = { { "ENS0000" } } }, 72 { .id = "" } /* end */ 73 }; 74 75 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids); 76 #endif 77 78 static snd_card_t *sscape_card[SNDRV_CARDS]; 79 80 81 #define MPU401_IO(i) ((i) + 0) 82 #define MIDI_DATA_IO(i) ((i) + 0) 83 #define MIDI_CTRL_IO(i) ((i) + 1) 84 #define HOST_CTRL_IO(i) ((i) + 2) 85 #define HOST_DATA_IO(i) ((i) + 3) 86 #define ODIE_ADDR_IO(i) ((i) + 4) 87 #define ODIE_DATA_IO(i) ((i) + 5) 88 #define CODEC_IO(i) ((i) + 8) 89 90 #define IC_ODIE 1 91 #define IC_OPUS 2 92 93 #define RX_READY 0x01 94 #define TX_READY 0x02 95 96 #define CMD_ACK 0x80 97 #define CMD_SET_MIDI_VOL 0x84 98 #define CMD_GET_MIDI_VOL 0x85 99 #define CMD_XXX_MIDI_VOL 0x86 100 #define CMD_SET_EXTMIDI 0x8a 101 #define CMD_GET_EXTMIDI 0x8b 102 #define CMD_SET_MT32 0x8c 103 #define CMD_GET_MT32 0x8d 104 105 enum GA_REG { 106 GA_INTSTAT_REG = 0, 107 GA_INTENA_REG, 108 GA_DMAA_REG, 109 GA_DMAB_REG, 110 GA_INTCFG_REG, 111 GA_DMACFG_REG, 112 GA_CDCFG_REG, 113 GA_SMCFGA_REG, 114 GA_SMCFGB_REG, 115 GA_HMCTL_REG 116 }; 117 118 #define DMA_8BIT 0x80 119 120 121 #define AD1845_FREQ_SEL_MSB 0x16 122 #define AD1845_FREQ_SEL_LSB 0x17 123 124 struct soundscape { 125 spinlock_t lock; 126 unsigned io_base; 127 int codec_type; 128 int ic_type; 129 struct resource *io_res; 130 cs4231_t *chip; 131 mpu401_t *mpu; 132 snd_hwdep_t *hw; 133 134 /* 135 * The MIDI device won't work until we've loaded 136 * its firmware via a hardware-dependent device IOCTL 137 */ 138 spinlock_t fwlock; 139 int hw_in_use; 140 unsigned long midi_usage; 141 unsigned char midi_vol; 142 }; 143 144 #define INVALID_IRQ ((unsigned)-1) 145 146 147 static inline struct soundscape *get_card_soundscape(snd_card_t * c) 148 { 149 return (struct soundscape *) (c->private_data); 150 } 151 152 static inline struct soundscape *get_mpu401_soundscape(mpu401_t * mpu) 153 { 154 return (struct soundscape *) (mpu->private_data); 155 } 156 157 static inline struct soundscape *get_hwdep_soundscape(snd_hwdep_t * hw) 158 { 159 return (struct soundscape *) (hw->private_data); 160 } 161 162 163 /* 164 * Allocates some kernel memory that we can use for DMA. 165 * I think this means that the memory has to map to 166 * contiguous pages of physical memory. 167 */ 168 static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned long size) 169 { 170 if (buf) { 171 if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(), 172 size, buf) < 0) { 173 snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size); 174 return NULL; 175 } 176 } 177 178 return buf; 179 } 180 181 /* 182 * Release the DMA-able kernel memory ... 183 */ 184 static void free_dmabuf(struct snd_dma_buffer *buf) 185 { 186 if (buf && buf->area) 187 snd_dma_free_pages(buf); 188 } 189 190 191 /* 192 * This function writes to the SoundScape's control registers, 193 * but doesn't do any locking. It's up to the caller to do that. 194 * This is why this function is "unsafe" ... 195 */ 196 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg, unsigned char val) 197 { 198 outb(reg, ODIE_ADDR_IO(io_base)); 199 outb(val, ODIE_DATA_IO(io_base)); 200 } 201 202 /* 203 * Write to the SoundScape's control registers, and do the 204 * necessary locking ... 205 */ 206 static void sscape_write(struct soundscape *s, enum GA_REG reg, unsigned char val) 207 { 208 unsigned long flags; 209 210 spin_lock_irqsave(&s->lock, flags); 211 sscape_write_unsafe(s->io_base, reg, val); 212 spin_unlock_irqrestore(&s->lock, flags); 213 } 214 215 /* 216 * Read from the SoundScape's control registers, but leave any 217 * locking to the caller. This is why the function is "unsafe" ... 218 */ 219 static inline unsigned char sscape_read_unsafe(unsigned io_base, enum GA_REG reg) 220 { 221 outb(reg, ODIE_ADDR_IO(io_base)); 222 return inb(ODIE_DATA_IO(io_base)); 223 } 224 225 /* 226 * Puts the SoundScape into "host" mode, as compared to "MIDI" mode 227 */ 228 static inline void set_host_mode_unsafe(unsigned io_base) 229 { 230 outb(0x0, HOST_CTRL_IO(io_base)); 231 } 232 233 /* 234 * Puts the SoundScape into "MIDI" mode, as compared to "host" mode 235 */ 236 static inline void set_midi_mode_unsafe(unsigned io_base) 237 { 238 outb(0x3, HOST_CTRL_IO(io_base)); 239 } 240 241 /* 242 * Read the SoundScape's host-mode control register, but leave 243 * any locking issues to the caller ... 244 */ 245 static inline int host_read_unsafe(unsigned io_base) 246 { 247 int data = -1; 248 if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0) { 249 data = inb(HOST_DATA_IO(io_base)); 250 } 251 252 return data; 253 } 254 255 /* 256 * Read the SoundScape's host-mode control register, performing 257 * a limited amount of busy-waiting if the register isn't ready. 258 * Also leaves all locking-issues to the caller ... 259 */ 260 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout) 261 { 262 int data; 263 264 while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) { 265 udelay(100); 266 --timeout; 267 } /* while */ 268 269 return data; 270 } 271 272 /* 273 * Write to the SoundScape's host-mode control registers, but 274 * leave any locking issues to the caller ... 275 */ 276 static inline int host_write_unsafe(unsigned io_base, unsigned char data) 277 { 278 if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) { 279 outb(data, HOST_DATA_IO(io_base)); 280 return 1; 281 } 282 283 return 0; 284 } 285 286 /* 287 * Write to the SoundScape's host-mode control registers, performing 288 * a limited amount of busy-waiting if the register isn't ready. 289 * Also leaves all locking-issues to the caller ... 290 */ 291 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data, 292 unsigned timeout) 293 { 294 int err; 295 296 while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) { 297 udelay(100); 298 --timeout; 299 } /* while */ 300 301 return err; 302 } 303 304 305 /* 306 * Check that the MIDI subsystem is operational. If it isn't, 307 * then we will hang the computer if we try to use it ... 308 * 309 * NOTE: This check is based upon observation, not documentation. 310 */ 311 static inline int verify_mpu401(const mpu401_t * mpu) 312 { 313 return ((inb(MIDI_CTRL_IO(mpu->port)) & 0xc0) == 0x80); 314 } 315 316 /* 317 * This is apparently the standard way to initailise an MPU-401 318 */ 319 static inline void initialise_mpu401(const mpu401_t * mpu) 320 { 321 outb(0, MIDI_DATA_IO(mpu->port)); 322 } 323 324 /* 325 * Tell the SoundScape to activate the AD1845 chip (I think). 326 * The AD1845 detection fails if we *don't* do this, so I 327 * think that this is a good idea ... 328 */ 329 static inline void activate_ad1845_unsafe(unsigned io_base) 330 { 331 sscape_write_unsafe(io_base, GA_HMCTL_REG, (sscape_read_unsafe(io_base, GA_HMCTL_REG) & 0xcf) | 0x10); 332 sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80); 333 } 334 335 /* 336 * Do the necessary ALSA-level cleanup to deallocate our driver ... 337 */ 338 static void soundscape_free(snd_card_t * c) 339 { 340 register struct soundscape *sscape = get_card_soundscape(c); 341 release_resource(sscape->io_res); 342 kfree_nocheck(sscape->io_res); 343 free_dma(sscape->chip->dma1); 344 } 345 346 /* 347 * Put this process into an idle wait-state for a certain number 348 * of "jiffies". The process can almost certainly be rescheduled 349 * while we're waiting, and so we must NOT be holding any spinlocks 350 * when we call this function. If we are then we risk DEADLOCK in 351 * SMP (Ha!) or pre-emptible kernels. 352 */ 353 static inline void sleep(long jiffs, int state) 354 { 355 set_current_state(state); 356 schedule_timeout(jiffs); 357 } 358 359 /* 360 * Tell the SoundScape to begin a DMA tranfer using the given channel. 361 * All locking issues are left to the caller. 362 */ 363 static inline void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg) 364 { 365 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) | 0x01); 366 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) & 0xfe); 367 } 368 369 /* 370 * Wait for a DMA transfer to complete. This is a "limited busy-wait", 371 * and all locking issues are left to the caller. 372 */ 373 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg, unsigned timeout) 374 { 375 while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) { 376 udelay(100); 377 --timeout; 378 } /* while */ 379 380 return (sscape_read_unsafe(io_base, reg) & 0x01); 381 } 382 383 /* 384 * Wait for the On-Board Processor to return its start-up 385 * acknowledgement sequence. This wait is too long for 386 * us to perform "busy-waiting", and so we must sleep. 387 * This in turn means that we must not be holding any 388 * spinlocks when we call this function. 389 */ 390 static int obp_startup_ack(struct soundscape *s, unsigned timeout) 391 { 392 while (timeout != 0) { 393 unsigned long flags; 394 unsigned char x; 395 396 sleep(1, TASK_INTERRUPTIBLE); 397 398 spin_lock_irqsave(&s->lock, flags); 399 x = inb(HOST_DATA_IO(s->io_base)); 400 spin_unlock_irqrestore(&s->lock, flags); 401 if ((x & 0xfe) == 0xfe) 402 return 1; 403 404 --timeout; 405 } /* while */ 406 407 return 0; 408 } 409 410 /* 411 * Wait for the host to return its start-up acknowledgement 412 * sequence. This wait is too long for us to perform 413 * "busy-waiting", and so we must sleep. This in turn means 414 * that we must not be holding any spinlocks when we call 415 * this function. 416 */ 417 static int host_startup_ack(struct soundscape *s, unsigned timeout) 418 { 419 while (timeout != 0) { 420 unsigned long flags; 421 unsigned char x; 422 423 sleep(1, TASK_INTERRUPTIBLE); 424 425 spin_lock_irqsave(&s->lock, flags); 426 x = inb(HOST_DATA_IO(s->io_base)); 427 spin_unlock_irqrestore(&s->lock, flags); 428 if (x == 0xfe) 429 return 1; 430 431 --timeout; 432 } /* while */ 433 434 return 0; 435 } 436 437 /* 438 * Upload a byte-stream into the SoundScape using DMA channel A. 439 */ 440 static int upload_dma_data(struct soundscape *s, 441 const unsigned char __user *data, 442 size_t size) 443 { 444 unsigned long flags; 445 struct snd_dma_buffer dma; 446 int ret; 447 448 if (!get_dmabuf(&dma, PAGE_ALIGN(size))) 449 return -ENOMEM; 450 451 spin_lock_irqsave(&s->lock, flags); 452 453 /* 454 * Reset the board ... 455 */ 456 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f); 457 458 /* 459 * Enable the DMA channels and configure them ... 460 */ 461 sscape_write_unsafe(s->io_base, GA_DMACFG_REG, 0x50); 462 sscape_write_unsafe(s->io_base, GA_DMAA_REG, (s->chip->dma1 << 4) | DMA_8BIT); 463 sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20); 464 465 /* 466 * Take the board out of reset ... 467 */ 468 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x80); 469 470 /* 471 * Upload the user's data (firmware?) to the SoundScape 472 * board through the DMA channel ... 473 */ 474 while (size != 0) { 475 unsigned long len; 476 477 /* 478 * Apparently, copying to/from userspace can sleep. 479 * We are therefore forbidden from holding any 480 * spinlocks while we copy ... 481 */ 482 spin_unlock_irqrestore(&s->lock, flags); 483 484 /* 485 * Remember that the data that we want to DMA 486 * comes from USERSPACE. We have already verified 487 * the userspace pointer ... 488 */ 489 len = min(size, dma.bytes); 490 len -= __copy_from_user(dma.area, data, len); 491 data += len; 492 size -= len; 493 494 /* 495 * Grab that spinlock again, now that we've 496 * finished copying! 497 */ 498 spin_lock_irqsave(&s->lock, flags); 499 500 snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE); 501 sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG); 502 if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) { 503 /* 504 * Don't forget to release this spinlock we're holding ... 505 */ 506 spin_unlock_irqrestore(&s->lock, flags); 507 508 snd_printk(KERN_ERR "sscape: DMA upload has timed out\n"); 509 ret = -EAGAIN; 510 goto _release_dma; 511 } 512 } /* while */ 513 514 set_host_mode_unsafe(s->io_base); 515 516 /* 517 * Boot the board ... (I think) 518 */ 519 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x40); 520 spin_unlock_irqrestore(&s->lock, flags); 521 522 /* 523 * If all has gone well, then the board should acknowledge 524 * the new upload and tell us that it has rebooted OK. We 525 * give it 5 seconds (max) ... 526 */ 527 ret = 0; 528 if (!obp_startup_ack(s, 5)) { 529 snd_printk(KERN_ERR "sscape: No response from on-board processor after upload\n"); 530 ret = -EAGAIN; 531 } else if (!host_startup_ack(s, 5)) { 532 snd_printk(KERN_ERR "sscape: SoundScape failed to initialise\n"); 533 ret = -EAGAIN; 534 } 535 536 _release_dma: 537 /* 538 * NOTE!!! We are NOT holding any spinlocks at this point !!! 539 */ 540 sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_ODIE ? 0x70 : 0x40)); 541 free_dmabuf(&dma); 542 543 return ret; 544 } 545 546 /* 547 * Upload the bootblock(?) into the SoundScape. The only 548 * purpose of this block of code seems to be to tell 549 * us which version of the microcode we should be using. 550 * 551 * NOTE: The boot-block data resides in USER-SPACE!!! 552 * However, we have already verified its memory 553 * addresses by the time we get here. 554 */ 555 static int sscape_upload_bootblock(struct soundscape *sscape, struct sscape_bootblock __user *bb) 556 { 557 unsigned long flags; 558 int data = 0; 559 int ret; 560 561 ret = upload_dma_data(sscape, bb->code, sizeof(bb->code)); 562 563 spin_lock_irqsave(&sscape->lock, flags); 564 if (ret == 0) { 565 data = host_read_ctrl_unsafe(sscape->io_base, 100); 566 } 567 set_midi_mode_unsafe(sscape->io_base); 568 spin_unlock_irqrestore(&sscape->lock, flags); 569 570 if (ret == 0) { 571 if (data < 0) { 572 snd_printk(KERN_ERR "sscape: timeout reading firmware version\n"); 573 ret = -EAGAIN; 574 } 575 else if (__copy_to_user(&bb->version, &data, sizeof(bb->version))) { 576 ret = -EFAULT; 577 } 578 } 579 580 return ret; 581 } 582 583 /* 584 * Upload the microcode into the SoundScape. The 585 * microcode is 64K of data, and if we try to copy 586 * it into a local variable then we will SMASH THE 587 * KERNEL'S STACK! We therefore leave it in USER 588 * SPACE, and save ourselves from copying it at all. 589 */ 590 static int sscape_upload_microcode(struct soundscape *sscape, 591 const struct sscape_microcode __user *mc) 592 { 593 unsigned long flags; 594 char __user *code; 595 int err; 596 597 /* 598 * We are going to have to copy this data into a special 599 * DMA-able buffer before we can upload it. We shall therefore 600 * just check that the data pointer is valid for now. 601 * 602 * NOTE: This buffer is 64K long! That's WAY too big to 603 * copy into a stack-temporary anyway. 604 */ 605 if ( get_user(code, &mc->code) || 606 !access_ok(VERIFY_READ, code, SSCAPE_MICROCODE_SIZE) ) 607 return -EFAULT; 608 609 if ((err = upload_dma_data(sscape, code, SSCAPE_MICROCODE_SIZE)) == 0) { 610 snd_printk(KERN_INFO "sscape: MIDI firmware loaded\n"); 611 } 612 613 spin_lock_irqsave(&sscape->lock, flags); 614 set_midi_mode_unsafe(sscape->io_base); 615 spin_unlock_irqrestore(&sscape->lock, flags); 616 617 initialise_mpu401(sscape->mpu); 618 619 return err; 620 } 621 622 /* 623 * Hardware-specific device functions, to implement special 624 * IOCTLs for the SoundScape card. This is how we upload 625 * the microcode into the card, for example, and so we 626 * must ensure that no two processes can open this device 627 * simultaneously, and that we can't open it at all if 628 * someone is using the MIDI device. 629 */ 630 static int sscape_hw_open(snd_hwdep_t * hw, struct file *file) 631 { 632 register struct soundscape *sscape = get_hwdep_soundscape(hw); 633 unsigned long flags; 634 int err; 635 636 spin_lock_irqsave(&sscape->fwlock, flags); 637 638 if ((sscape->midi_usage != 0) || sscape->hw_in_use) { 639 err = -EBUSY; 640 } else { 641 sscape->hw_in_use = 1; 642 err = 0; 643 } 644 645 spin_unlock_irqrestore(&sscape->fwlock, flags); 646 return err; 647 } 648 649 static int sscape_hw_release(snd_hwdep_t * hw, struct file *file) 650 { 651 register struct soundscape *sscape = get_hwdep_soundscape(hw); 652 unsigned long flags; 653 654 spin_lock_irqsave(&sscape->fwlock, flags); 655 sscape->hw_in_use = 0; 656 spin_unlock_irqrestore(&sscape->fwlock, flags); 657 return 0; 658 } 659 660 static int sscape_hw_ioctl(snd_hwdep_t * hw, struct file *file, 661 unsigned int cmd, unsigned long arg) 662 { 663 struct soundscape *sscape = get_hwdep_soundscape(hw); 664 int err = -EBUSY; 665 666 switch (cmd) { 667 case SND_SSCAPE_LOAD_BOOTB: 668 { 669 register struct sscape_bootblock __user *bb = (struct sscape_bootblock __user *) arg; 670 671 /* 672 * We are going to have to copy this data into a special 673 * DMA-able buffer before we can upload it. We shall therefore 674 * just check that the data pointer is valid for now ... 675 */ 676 if ( !access_ok(VERIFY_READ, bb->code, sizeof(bb->code)) ) 677 return -EFAULT; 678 679 /* 680 * Now check that we can write the firmware version number too... 681 */ 682 if ( !access_ok(VERIFY_WRITE, &bb->version, sizeof(bb->version)) ) 683 return -EFAULT; 684 685 err = sscape_upload_bootblock(sscape, bb); 686 } 687 break; 688 689 case SND_SSCAPE_LOAD_MCODE: 690 { 691 register const struct sscape_microcode __user *mc = (const struct sscape_microcode __user *) arg; 692 693 err = sscape_upload_microcode(sscape, mc); 694 } 695 break; 696 697 default: 698 err = -EINVAL; 699 break; 700 } /* switch */ 701 702 return err; 703 } 704 705 706 /* 707 * Mixer control for the SoundScape's MIDI device. 708 */ 709 static int sscape_midi_info(snd_kcontrol_t * ctl, 710 snd_ctl_elem_info_t * uinfo) 711 { 712 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 713 uinfo->count = 1; 714 uinfo->value.integer.min = 0; 715 uinfo->value.integer.max = 127; 716 return 0; 717 } 718 719 static int sscape_midi_get(snd_kcontrol_t * kctl, 720 snd_ctl_elem_value_t * uctl) 721 { 722 cs4231_t *chip = snd_kcontrol_chip(kctl); 723 snd_card_t *card = chip->card; 724 register struct soundscape *s = get_card_soundscape(card); 725 unsigned long flags; 726 727 spin_lock_irqsave(&s->lock, flags); 728 set_host_mode_unsafe(s->io_base); 729 730 if (host_write_ctrl_unsafe(s->io_base, CMD_GET_MIDI_VOL, 100)) { 731 uctl->value.integer.value[0] = host_read_ctrl_unsafe(s->io_base, 100); 732 } 733 734 set_midi_mode_unsafe(s->io_base); 735 spin_unlock_irqrestore(&s->lock, flags); 736 return 0; 737 } 738 739 static int sscape_midi_put(snd_kcontrol_t * kctl, 740 snd_ctl_elem_value_t * uctl) 741 { 742 cs4231_t *chip = snd_kcontrol_chip(kctl); 743 snd_card_t *card = chip->card; 744 register struct soundscape *s = get_card_soundscape(card); 745 unsigned long flags; 746 int change; 747 748 spin_lock_irqsave(&s->lock, flags); 749 750 /* 751 * We need to put the board into HOST mode before we 752 * can send any volume-changing HOST commands ... 753 */ 754 set_host_mode_unsafe(s->io_base); 755 756 /* 757 * To successfully change the MIDI volume setting, you seem to 758 * have to write a volume command, write the new volume value, 759 * and then perform another volume-related command. Perhaps the 760 * first command is an "open" and the second command is a "close"? 761 */ 762 if (s->midi_vol == ((unsigned char) uctl->value.integer. value[0] & 127)) { 763 change = 0; 764 goto __skip_change; 765 } 766 change = (host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100) 767 && host_write_ctrl_unsafe(s->io_base, ((unsigned char) uctl->value.integer. value[0]) & 127, 100) 768 && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100)); 769 __skip_change: 770 771 /* 772 * Take the board out of HOST mode and back into MIDI mode ... 773 */ 774 set_midi_mode_unsafe(s->io_base); 775 776 spin_unlock_irqrestore(&s->lock, flags); 777 return change; 778 } 779 780 static snd_kcontrol_new_t midi_mixer_ctl = { 781 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 782 .name = "MIDI", 783 .info = sscape_midi_info, 784 .get = sscape_midi_get, 785 .put = sscape_midi_put 786 }; 787 788 /* 789 * The SoundScape can use two IRQs from a possible set of four. 790 * These IRQs are encoded as bit patterns so that they can be 791 * written to the control registers. 792 */ 793 static unsigned __devinit get_irq_config(int irq) 794 { 795 static const int valid_irq[] = { 9, 5, 7, 10 }; 796 unsigned cfg; 797 798 for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg) { 799 if (irq == valid_irq[cfg]) 800 return cfg; 801 } /* for */ 802 803 return INVALID_IRQ; 804 } 805 806 807 /* 808 * Perform certain arcane port-checks to see whether there 809 * is a SoundScape board lurking behind the given ports. 810 */ 811 static int __devinit detect_sscape(struct soundscape *s) 812 { 813 unsigned long flags; 814 unsigned d; 815 int retval = 0; 816 817 spin_lock_irqsave(&s->lock, flags); 818 819 /* 820 * The following code is lifted from the original OSS driver, 821 * and as I don't have a datasheet I cannot really comment 822 * on what it is doing... 823 */ 824 if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0) 825 goto _done; 826 827 d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0; 828 if ((d & 0x80) != 0) 829 goto _done; 830 831 if (d == 0) { 832 s->codec_type = 1; 833 s->ic_type = IC_ODIE; 834 } else if ((d & 0x60) != 0) { 835 s->codec_type = 2; 836 s->ic_type = IC_OPUS; 837 } else 838 goto _done; 839 840 outb(0xfa, ODIE_ADDR_IO(s->io_base)); 841 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a) 842 goto _done; 843 844 outb(0xfe, ODIE_ADDR_IO(s->io_base)); 845 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e) 846 goto _done; 847 if ((inb(ODIE_DATA_IO(s->io_base)) & 0x9f) != 0x0e) 848 goto _done; 849 850 /* 851 * SoundScape successfully detected! 852 */ 853 retval = 1; 854 855 _done: 856 spin_unlock_irqrestore(&s->lock, flags); 857 return retval; 858 } 859 860 /* 861 * ALSA callback function, called when attempting to open the MIDI device. 862 * Check that the MIDI firmware has been loaded, because we don't want 863 * to crash the machine. Also check that someone isn't using the hardware 864 * IOCTL device. 865 */ 866 static int mpu401_open(mpu401_t * mpu) 867 { 868 int err; 869 870 if (!verify_mpu401(mpu)) { 871 snd_printk(KERN_ERR "sscape: MIDI disabled, please load firmware\n"); 872 err = -ENODEV; 873 } else { 874 register struct soundscape *sscape = get_mpu401_soundscape(mpu); 875 unsigned long flags; 876 877 spin_lock_irqsave(&sscape->fwlock, flags); 878 879 if (sscape->hw_in_use || (sscape->midi_usage == ULONG_MAX)) { 880 err = -EBUSY; 881 } else { 882 ++(sscape->midi_usage); 883 err = 0; 884 } 885 886 spin_unlock_irqrestore(&sscape->fwlock, flags); 887 } 888 889 return err; 890 } 891 892 static void mpu401_close(mpu401_t * mpu) 893 { 894 register struct soundscape *sscape = get_mpu401_soundscape(mpu); 895 unsigned long flags; 896 897 spin_lock_irqsave(&sscape->fwlock, flags); 898 --(sscape->midi_usage); 899 spin_unlock_irqrestore(&sscape->fwlock, flags); 900 } 901 902 /* 903 * Initialse an MPU-401 subdevice for MIDI support on the SoundScape. 904 */ 905 static int __devinit create_mpu401(snd_card_t * card, int devnum, unsigned long port, int irq) 906 { 907 struct soundscape *sscape = get_card_soundscape(card); 908 snd_rawmidi_t *rawmidi; 909 int err; 910 911 #define MPU401_SHARE_HARDWARE 1 912 if ((err = snd_mpu401_uart_new(card, devnum, 913 MPU401_HW_MPU401, 914 port, MPU401_SHARE_HARDWARE, 915 irq, SA_INTERRUPT, 916 &rawmidi)) == 0) { 917 mpu401_t *mpu = (mpu401_t *) rawmidi->private_data; 918 mpu->open_input = mpu401_open; 919 mpu->open_output = mpu401_open; 920 mpu->close_input = mpu401_close; 921 mpu->close_output = mpu401_close; 922 mpu->private_data = sscape; 923 sscape->mpu = mpu; 924 925 initialise_mpu401(mpu); 926 } 927 928 return err; 929 } 930 931 932 /* 933 * Override for the CS4231 playback format function. 934 * The AD1845 has much simpler format and rate selection. 935 */ 936 static void ad1845_playback_format(cs4231_t * chip, snd_pcm_hw_params_t * params, unsigned char format) 937 { 938 unsigned long flags; 939 unsigned rate = params_rate(params); 940 941 /* 942 * The AD1845 can't handle sample frequencies 943 * outside of 4 kHZ to 50 kHZ 944 */ 945 if (rate > 50000) 946 rate = 50000; 947 else if (rate < 4000) 948 rate = 4000; 949 950 spin_lock_irqsave(&chip->reg_lock, flags); 951 952 /* 953 * Program the AD1845 correctly for the playback stream. 954 * Note that we do NOT need to toggle the MCE bit because 955 * the PLAYBACK_ENABLE bit of the Interface Configuration 956 * register is set. 957 * 958 * NOTE: We seem to need to write to the MSB before the LSB 959 * to get the correct sample frequency. 960 */ 961 snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, (format & 0xf0)); 962 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8)); 963 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate); 964 965 spin_unlock_irqrestore(&chip->reg_lock, flags); 966 } 967 968 /* 969 * Override for the CS4231 capture format function. 970 * The AD1845 has much simpler format and rate selection. 971 */ 972 static void ad1845_capture_format(cs4231_t * chip, snd_pcm_hw_params_t * params, unsigned char format) 973 { 974 unsigned long flags; 975 unsigned rate = params_rate(params); 976 977 /* 978 * The AD1845 can't handle sample frequencies 979 * outside of 4 kHZ to 50 kHZ 980 */ 981 if (rate > 50000) 982 rate = 50000; 983 else if (rate < 4000) 984 rate = 4000; 985 986 spin_lock_irqsave(&chip->reg_lock, flags); 987 988 /* 989 * Program the AD1845 correctly for the playback stream. 990 * Note that we do NOT need to toggle the MCE bit because 991 * the CAPTURE_ENABLE bit of the Interface Configuration 992 * register is set. 993 * 994 * NOTE: We seem to need to write to the MSB before the LSB 995 * to get the correct sample frequency. 996 */ 997 snd_cs4231_out(chip, CS4231_REC_FORMAT, (format & 0xf0)); 998 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8)); 999 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate); 1000 1001 spin_unlock_irqrestore(&chip->reg_lock, flags); 1002 } 1003 1004 /* 1005 * Create an AD1845 PCM subdevice on the SoundScape. The AD1845 1006 * is very much like a CS4231, with a few extra bits. We will 1007 * try to support at least some of the extra bits by overriding 1008 * some of the CS4231 callback. 1009 */ 1010 static int __devinit create_ad1845(snd_card_t * card, unsigned port, int irq, int dma1) 1011 { 1012 register struct soundscape *sscape = get_card_soundscape(card); 1013 cs4231_t *chip; 1014 int err; 1015 1016 #define CS4231_SHARE_HARDWARE (CS4231_HWSHARE_DMA1 | CS4231_HWSHARE_DMA2) 1017 /* 1018 * The AD1845 PCM device is only half-duplex, and so 1019 * we only give it one DMA channel ... 1020 */ 1021 if ((err = snd_cs4231_create(card, 1022 port, -1, irq, dma1, dma1, 1023 CS4231_HW_DETECT, 1024 CS4231_HWSHARE_DMA1, &chip)) == 0) { 1025 unsigned long flags; 1026 snd_pcm_t *pcm; 1027 1028 #define AD1845_FREQ_SEL_ENABLE 0x08 1029 1030 #define AD1845_PWR_DOWN_CTRL 0x1b 1031 #define AD1845_CRYS_CLOCK_SEL 0x1d 1032 1033 /* 1034 * It turns out that the PLAYBACK_ENABLE bit is set 1035 * by the lowlevel driver ... 1036 * 1037 #define AD1845_IFACE_CONFIG \ 1038 (CS4231_AUTOCALIB | CS4231_RECORD_ENABLE | CS4231_PLAYBACK_ENABLE) 1039 snd_cs4231_mce_up(chip); 1040 spin_lock_irqsave(&chip->reg_lock, flags); 1041 snd_cs4231_out(chip, CS4231_IFACE_CTRL, AD1845_IFACE_CONFIG); 1042 spin_unlock_irqrestore(&chip->reg_lock, flags); 1043 snd_cs4231_mce_down(chip); 1044 */ 1045 1046 /* 1047 * The input clock frequency on the SoundScape must 1048 * be 14.31818 MHz, because we must set this register 1049 * to get the playback to sound correct ... 1050 */ 1051 snd_cs4231_mce_up(chip); 1052 spin_lock_irqsave(&chip->reg_lock, flags); 1053 snd_cs4231_out(chip, AD1845_CRYS_CLOCK_SEL, 0x20); 1054 spin_unlock_irqrestore(&chip->reg_lock, flags); 1055 snd_cs4231_mce_down(chip); 1056 1057 /* 1058 * More custom configuration: 1059 * a) select "mode 2", and provide a current drive of 8 mA 1060 * b) enable frequency selection (for capture/playback) 1061 */ 1062 spin_lock_irqsave(&chip->reg_lock, flags); 1063 snd_cs4231_out(chip, CS4231_MISC_INFO, (CS4231_MODE2 | 0x10)); 1064 snd_cs4231_out(chip, AD1845_PWR_DOWN_CTRL, snd_cs4231_in(chip, AD1845_PWR_DOWN_CTRL) | AD1845_FREQ_SEL_ENABLE); 1065 spin_unlock_irqrestore(&chip->reg_lock, flags); 1066 1067 if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0) { 1068 snd_printk(KERN_ERR "sscape: No PCM device for AD1845 chip\n"); 1069 goto _error; 1070 } 1071 1072 if ((err = snd_cs4231_mixer(chip)) < 0) { 1073 snd_printk(KERN_ERR "sscape: No mixer device for AD1845 chip\n"); 1074 goto _error; 1075 } 1076 1077 if ((err = snd_ctl_add(card, snd_ctl_new1(&midi_mixer_ctl, chip))) < 0) { 1078 snd_printk(KERN_ERR "sscape: Could not create MIDI mixer control\n"); 1079 goto _error; 1080 } 1081 1082 strcpy(card->driver, "SoundScape"); 1083 strcpy(card->shortname, pcm->name); 1084 snprintf(card->longname, sizeof(card->longname), 1085 "%s at 0x%lx, IRQ %d, DMA %d\n", 1086 pcm->name, chip->port, chip->irq, chip->dma1); 1087 chip->set_playback_format = ad1845_playback_format; 1088 chip->set_capture_format = ad1845_capture_format; 1089 sscape->chip = chip; 1090 } 1091 1092 _error: 1093 return err; 1094 } 1095 1096 1097 struct params 1098 { 1099 int index; 1100 const char *id; 1101 unsigned port; 1102 int irq; 1103 int mpu_irq; 1104 int dma1; 1105 }; 1106 1107 1108 static inline struct params* 1109 init_params(struct params *params, 1110 int index, 1111 const char *id, 1112 unsigned port, 1113 int irq, 1114 int mpu_irq, 1115 int dma1) 1116 { 1117 params->index = index; 1118 params->id = id; 1119 params->port = port; 1120 params->irq = irq; 1121 params->mpu_irq = mpu_irq; 1122 params->dma1 = (dma1 & 0x03); 1123 1124 return params; 1125 } 1126 1127 1128 /* 1129 * Create an ALSA soundcard entry for the SoundScape, using 1130 * the given list of port, IRQ and DMA resources. 1131 */ 1132 static int __devinit create_sscape(const struct params *params, snd_card_t **rcardp) 1133 { 1134 snd_card_t *card; 1135 register struct soundscape *sscape; 1136 register unsigned dma_cfg; 1137 unsigned irq_cfg; 1138 unsigned mpu_irq_cfg; 1139 struct resource *io_res; 1140 unsigned long flags; 1141 int err; 1142 1143 /* 1144 * Check that the user didn't pass us garbage data ... 1145 */ 1146 irq_cfg = get_irq_config(params->irq); 1147 if (irq_cfg == INVALID_IRQ) { 1148 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", params->irq); 1149 return -ENXIO; 1150 } 1151 1152 mpu_irq_cfg = get_irq_config(params->mpu_irq); 1153 if (mpu_irq_cfg == INVALID_IRQ) { 1154 printk(KERN_ERR "sscape: Invalid IRQ %d\n", params->mpu_irq); 1155 return -ENXIO; 1156 } 1157 1158 /* 1159 * Grab IO ports that we will need to probe so that we 1160 * can detect and control this hardware ... 1161 */ 1162 if ((io_res = request_region(params->port, 8, "SoundScape")) == NULL) { 1163 snd_printk(KERN_ERR "sscape: can't grab port 0x%x\n", params->port); 1164 return -EBUSY; 1165 } 1166 1167 /* 1168 * Grab both DMA channels (OK, only one for now) ... 1169 */ 1170 if ((err = request_dma(params->dma1, "SoundScape")) < 0) { 1171 snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", params->dma1); 1172 goto _release_region; 1173 } 1174 1175 /* 1176 * Create a new ALSA sound card entry, in anticipation 1177 * of detecting our hardware ... 1178 */ 1179 if ((card = snd_card_new(params->index, params->id, THIS_MODULE, sizeof(struct soundscape))) == NULL) { 1180 err = -ENOMEM; 1181 goto _release_dma; 1182 } 1183 1184 sscape = get_card_soundscape(card); 1185 spin_lock_init(&sscape->lock); 1186 spin_lock_init(&sscape->fwlock); 1187 sscape->io_res = io_res; 1188 sscape->io_base = params->port; 1189 1190 if (!detect_sscape(sscape)) { 1191 printk(KERN_ERR "sscape: hardware not detected at 0x%x\n", sscape->io_base); 1192 err = -ENODEV; 1193 goto _release_card; 1194 } 1195 1196 printk(KERN_INFO "sscape: hardware detected at 0x%x, using IRQ %d, DMA %d\n", 1197 sscape->io_base, params->irq, params->dma1); 1198 1199 /* 1200 * Now create the hardware-specific device so that we can 1201 * load the microcode into the on-board processor. 1202 * We cannot use the MPU-401 MIDI system until this firmware 1203 * has been loaded into the card. 1204 */ 1205 if ((err = snd_hwdep_new(card, "MC68EC000", 0, &(sscape->hw))) < 0) { 1206 printk(KERN_ERR "sscape: Failed to create firmware device\n"); 1207 goto _release_card; 1208 } 1209 strlcpy(sscape->hw->name, "SoundScape M68K", sizeof(sscape->hw->name)); 1210 sscape->hw->name[sizeof(sscape->hw->name) - 1] = '\0'; 1211 sscape->hw->iface = SNDRV_HWDEP_IFACE_SSCAPE; 1212 sscape->hw->ops.open = sscape_hw_open; 1213 sscape->hw->ops.release = sscape_hw_release; 1214 sscape->hw->ops.ioctl = sscape_hw_ioctl; 1215 sscape->hw->private_data = sscape; 1216 1217 /* 1218 * Tell the on-board devices where their resources are (I think - 1219 * I can't be sure without a datasheet ... So many magic values!) 1220 */ 1221 spin_lock_irqsave(&sscape->lock, flags); 1222 1223 activate_ad1845_unsafe(sscape->io_base); 1224 1225 sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x00); /* disable */ 1226 sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e); 1227 sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00); 1228 1229 /* 1230 * Enable and configure the DMA channels ... 1231 */ 1232 sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50); 1233 dma_cfg = (sscape->ic_type == IC_ODIE ? 0x70 : 0x40); 1234 sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg); 1235 sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20); 1236 1237 sscape_write_unsafe(sscape->io_base, 1238 GA_INTCFG_REG, 0xf0 | (mpu_irq_cfg << 2) | mpu_irq_cfg); 1239 sscape_write_unsafe(sscape->io_base, 1240 GA_CDCFG_REG, 0x09 | DMA_8BIT | (params->dma1 << 4) | (irq_cfg << 1)); 1241 1242 spin_unlock_irqrestore(&sscape->lock, flags); 1243 1244 /* 1245 * We have now enabled the codec chip, and so we should 1246 * detect the AD1845 device ... 1247 */ 1248 if ((err = create_ad1845(card, CODEC_IO(params->port), params->irq, params->dma1)) < 0) { 1249 printk(KERN_ERR "sscape: No AD1845 device at 0x%x, IRQ %d\n", 1250 CODEC_IO(params->port), params->irq); 1251 goto _release_card; 1252 } 1253 #define MIDI_DEVNUM 0 1254 if ((err = create_mpu401(card, MIDI_DEVNUM, MPU401_IO(params->port), params->mpu_irq)) < 0) { 1255 printk(KERN_ERR "sscape: Failed to create MPU-401 device at 0x%x\n", 1256 MPU401_IO(params->port)); 1257 goto _release_card; 1258 } 1259 1260 /* 1261 * Enable the master IRQ ... 1262 */ 1263 sscape_write(sscape, GA_INTENA_REG, 0x80); 1264 1265 if ((err = snd_card_register(card)) < 0) { 1266 printk(KERN_ERR "sscape: Failed to register sound card\n"); 1267 goto _release_card; 1268 } 1269 1270 /* 1271 * Initialize mixer 1272 */ 1273 sscape->midi_vol = 0; 1274 host_write_ctrl_unsafe(sscape->io_base, CMD_SET_MIDI_VOL, 100); 1275 host_write_ctrl_unsafe(sscape->io_base, 0, 100); 1276 host_write_ctrl_unsafe(sscape->io_base, CMD_XXX_MIDI_VOL, 100); 1277 1278 /* 1279 * Now that we have successfully created this sound card, 1280 * it is safe to store the pointer. 1281 * NOTE: we only register the sound card's "destructor" 1282 * function now that our "constructor" has completed. 1283 */ 1284 card->private_free = soundscape_free; 1285 *rcardp = card; 1286 1287 return 0; 1288 1289 _release_card: 1290 snd_card_free(card); 1291 1292 _release_dma: 1293 free_dma(params->dma1); 1294 1295 _release_region: 1296 release_resource(io_res); 1297 kfree_nocheck(io_res); 1298 1299 return err; 1300 } 1301 1302 1303 static int sscape_cards __devinitdata; 1304 static struct params sscape_params[SNDRV_CARDS] __devinitdata; 1305 1306 #ifdef CONFIG_PNP 1307 static inline int __devinit get_next_autoindex(int i) 1308 { 1309 while ((i < SNDRV_CARDS) && (port[i] != SNDRV_AUTO_PORT)) { 1310 ++i; 1311 } /* while */ 1312 1313 return i; 1314 } 1315 1316 1317 static inline int __devinit is_port_known(unsigned io, struct params *params, int cards) 1318 { 1319 while (--cards >= 0) { 1320 if (params[cards].port == io) 1321 return 1; 1322 } /* while */ 1323 1324 return 0; 1325 } 1326 1327 static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard, 1328 const struct pnp_card_device_id *pid) 1329 { 1330 struct pnp_dev *dev; 1331 static int idx = 0; 1332 int ret; 1333 1334 /* 1335 * Allow this function to fail *quietly* if all the ISA PnP 1336 * devices were configured using module parameters instead. 1337 */ 1338 if ((idx = get_next_autoindex(idx)) >= SNDRV_CARDS) { 1339 return -ENOSPC; 1340 } 1341 1342 /* 1343 * We have found a candidate ISA PnP card. Now we 1344 * have to check that it has the devices that we 1345 * expect it to have. 1346 * 1347 * We will NOT try and autoconfigure all of the resources 1348 * needed and then activate the card as we are assuming that 1349 * has already been done at boot-time using /proc/isapnp. 1350 * We shall simply try to give each active card the resources 1351 * that it wants. This is a sensible strategy for a modular 1352 * system where unused modules are unloaded regularly. 1353 * 1354 * This strategy is utterly useless if we compile the driver 1355 * into the kernel, of course. 1356 */ 1357 // printk(KERN_INFO "sscape: %s\n", card->name); 1358 1359 /* 1360 * Check that we still have room for another sound card ... 1361 */ 1362 if (sscape_cards >= SNDRV_CARDS) { 1363 printk(KERN_ERR "sscape: No room for another ALSA device\n"); 1364 return -ENOSPC; 1365 } 1366 1367 ret = -ENODEV; 1368 1369 dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL); 1370 if (dev) { 1371 struct params *this; 1372 if (!pnp_is_active(dev)) { 1373 if (pnp_activate_dev(dev) < 0) { 1374 printk(KERN_INFO "sscape: device is inactive\n"); 1375 return -EBUSY; 1376 } 1377 } 1378 /* 1379 * Read the correct parameters off the ISA PnP bus ... 1380 */ 1381 this = init_params(&sscape_params[sscape_cards], 1382 index[idx], 1383 id[idx], 1384 pnp_port_start(dev, 0), 1385 pnp_irq(dev, 0), 1386 pnp_irq(dev, 1), 1387 pnp_dma(dev, 0)); 1388 1389 /* 1390 * Do we know about this sound card already? 1391 */ 1392 if ( !is_port_known(this->port, sscape_params, sscape_cards) ) { 1393 snd_card_t *card; 1394 1395 ret = create_sscape(this, &card); 1396 if (ret < 0) 1397 return ret; 1398 snd_card_set_dev(card, &pcard->card->dev); 1399 pnp_set_card_drvdata(pcard, card); 1400 ++sscape_cards; 1401 ++idx; 1402 } 1403 } 1404 1405 return ret; 1406 } 1407 1408 static void __devexit sscape_pnp_remove(struct pnp_card_link * pcard) 1409 { 1410 snd_card_t *card = (snd_card_t *) pnp_get_card_drvdata(pcard); 1411 1412 pnp_set_card_drvdata(pcard, NULL); 1413 snd_card_disconnect(card); 1414 snd_card_free_in_thread(card); 1415 } 1416 1417 static struct pnp_card_driver sscape_pnpc_driver = { 1418 .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, 1419 .name = "sscape", 1420 .id_table = sscape_pnpids, 1421 .probe = sscape_pnp_detect, 1422 .remove = __devexit_p(sscape_pnp_remove), 1423 }; 1424 1425 #endif /* CONFIG_PNP */ 1426 1427 static int __init sscape_manual_probe(struct params *params) 1428 { 1429 int ret; 1430 unsigned i; 1431 snd_card_t *card; 1432 1433 for (i = 0; i < SNDRV_CARDS; ++i) { 1434 /* 1435 * We do NOT probe for ports. 1436 * If we're not given a port number for this 1437 * card then we completely ignore this line 1438 * of parameters. 1439 */ 1440 if (port[i] == SNDRV_AUTO_PORT) 1441 continue; 1442 1443 /* 1444 * Make sure we were given ALL of the other parameters. 1445 */ 1446 if ( (irq[i] == SNDRV_AUTO_IRQ) || 1447 (mpu_irq[i] == SNDRV_AUTO_IRQ) || 1448 (dma[i] == SNDRV_AUTO_DMA) ) { 1449 printk(KERN_INFO 1450 "sscape: insufficient parameters, need IO, IRQ, MPU-IRQ and DMA\n"); 1451 return -ENXIO; 1452 } 1453 1454 /* 1455 * This cards looks OK ... 1456 */ 1457 init_params(params, index[i], id[i], port[i], irq[i], mpu_irq[i], dma[i]); 1458 1459 ret = create_sscape(params, &card); 1460 if (ret < 0) 1461 return ret; 1462 1463 sscape_card[sscape_cards] = card; 1464 params++; 1465 sscape_cards++; 1466 } /* for */ 1467 1468 return 0; 1469 } 1470 1471 1472 static void sscape_exit(void) 1473 { 1474 unsigned i; 1475 1476 #ifdef CONFIG_PNP 1477 pnp_unregister_card_driver(&sscape_pnpc_driver); 1478 #endif 1479 for (i = 0; i < ARRAY_SIZE(sscape_card); ++i) { 1480 snd_card_free(sscape_card[i]); 1481 } /* for */ 1482 } 1483 1484 1485 static int __init sscape_init(void) 1486 { 1487 int ret; 1488 1489 /* 1490 * First check whether we were passed any parameters. 1491 * These MUST take precedence over ANY automatic way 1492 * of allocating cards, because the operator is 1493 * S-P-E-L-L-I-N-G it out for us... 1494 */ 1495 ret = sscape_manual_probe(sscape_params); 1496 if (ret < 0) { 1497 int i; 1498 for (i = 0; i < sscape_cards; ++i) 1499 snd_card_free(sscape_card[i]); 1500 return ret; 1501 } 1502 1503 #ifdef CONFIG_PNP 1504 if (sscape_cards < SNDRV_CARDS) { 1505 ret = pnp_register_card_driver(&sscape_pnpc_driver); 1506 if (ret < 0) { 1507 sscape_exit(); 1508 return ret; 1509 } 1510 } 1511 #endif 1512 1513 return 0; 1514 } 1515 1516 module_init(sscape_init); 1517 module_exit(sscape_exit); 1518