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TOMOYO Linux Cross Reference
Linux/sound/isa/sscape.c

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  1 /*
  2  *   Low-level ALSA driver for the ENSONIQ SoundScape
  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 <linux/init.h>
 25 #include <linux/err.h>
 26 #include <linux/io.h>
 27 #include <linux/isa.h>
 28 #include <linux/delay.h>
 29 #include <linux/firmware.h>
 30 #include <linux/pnp.h>
 31 #include <linux/spinlock.h>
 32 #include <linux/module.h>
 33 #include <asm/dma.h>
 34 #include <sound/core.h>
 35 #include <sound/wss.h>
 36 #include <sound/mpu401.h>
 37 #include <sound/initval.h>
 38 
 39 
 40 MODULE_AUTHOR("Chris Rankin");
 41 MODULE_DESCRIPTION("ENSONIQ SoundScape driver");
 42 MODULE_LICENSE("GPL");
 43 MODULE_FIRMWARE("sndscape.co0");
 44 MODULE_FIRMWARE("sndscape.co1");
 45 MODULE_FIRMWARE("sndscape.co2");
 46 MODULE_FIRMWARE("sndscape.co3");
 47 MODULE_FIRMWARE("sndscape.co4");
 48 MODULE_FIRMWARE("scope.cod");
 49 
 50 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 51 static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 52 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
 53 static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
 54 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
 55 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
 56 static int dma[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
 57 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
 58 static bool joystick[SNDRV_CARDS];
 59 
 60 module_param_array(index, int, NULL, 0444);
 61 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
 62 
 63 module_param_array(id, charp, NULL, 0444);
 64 MODULE_PARM_DESC(id, "Description for SoundScape card");
 65 
 66 module_param_hw_array(port, long, ioport, NULL, 0444);
 67 MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
 68 
 69 module_param_hw_array(wss_port, long, ioport, NULL, 0444);
 70 MODULE_PARM_DESC(wss_port, "WSS Port # for SoundScape driver.");
 71 
 72 module_param_hw_array(irq, int, irq, NULL, 0444);
 73 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
 74 
 75 module_param_hw_array(mpu_irq, int, irq, NULL, 0444);
 76 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
 77 
 78 module_param_hw_array(dma, int, dma, NULL, 0444);
 79 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
 80 
 81 module_param_hw_array(dma2, int, dma, NULL, 0444);
 82 MODULE_PARM_DESC(dma2, "DMA2 # for SoundScape driver.");
 83 
 84 module_param_array(joystick, bool, NULL, 0444);
 85 MODULE_PARM_DESC(joystick, "Enable gameport.");
 86 
 87 #ifdef CONFIG_PNP
 88 static int isa_registered;
 89 static int pnp_registered;
 90 
 91 static const struct pnp_card_device_id sscape_pnpids[] = {
 92         { .id = "ENS3081", .devs = { { "ENS0000" } } }, /* Soundscape PnP */
 93         { .id = "ENS4081", .devs = { { "ENS1011" } } }, /* VIVO90 */
 94         { .id = "" }    /* end */
 95 };
 96 
 97 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
 98 #endif
 99 
100 
101 #define HOST_CTRL_IO(i)  ((i) + 2)
102 #define HOST_DATA_IO(i)  ((i) + 3)
103 #define ODIE_ADDR_IO(i)  ((i) + 4)
104 #define ODIE_DATA_IO(i)  ((i) + 5)
105 #define CODEC_IO(i)      ((i) + 8)
106 
107 #define IC_ODIE  1
108 #define IC_OPUS  2
109 
110 #define RX_READY 0x01
111 #define TX_READY 0x02
112 
113 #define CMD_ACK                 0x80
114 #define CMD_SET_MIDI_VOL        0x84
115 #define CMD_GET_MIDI_VOL        0x85
116 #define CMD_XXX_MIDI_VOL        0x86
117 #define CMD_SET_EXTMIDI         0x8a
118 #define CMD_GET_EXTMIDI         0x8b
119 #define CMD_SET_MT32            0x8c
120 #define CMD_GET_MT32            0x8d
121 
122 enum GA_REG {
123         GA_INTSTAT_REG = 0,
124         GA_INTENA_REG,
125         GA_DMAA_REG,
126         GA_DMAB_REG,
127         GA_INTCFG_REG,
128         GA_DMACFG_REG,
129         GA_CDCFG_REG,
130         GA_SMCFGA_REG,
131         GA_SMCFGB_REG,
132         GA_HMCTL_REG
133 };
134 
135 #define DMA_8BIT  0x80
136 
137 
138 enum card_type {
139         MEDIA_FX,       /* Sequoia S-1000 */
140         SSCAPE,         /* Sequoia S-2000 */
141         SSCAPE_PNP,
142         SSCAPE_VIVO,
143 };
144 
145 struct soundscape {
146         spinlock_t lock;
147         unsigned io_base;
148         int ic_type;
149         enum card_type type;
150         struct resource *io_res;
151         struct resource *wss_res;
152         struct snd_wss *chip;
153 
154         unsigned char midi_vol;
155 };
156 
157 #define INVALID_IRQ  ((unsigned)-1)
158 
159 
160 static inline struct soundscape *get_card_soundscape(struct snd_card *c)
161 {
162         return (struct soundscape *) (c->private_data);
163 }
164 
165 /*
166  * Allocates some kernel memory that we can use for DMA.
167  * I think this means that the memory has to map to
168  * contiguous pages of physical memory.
169  */
170 static struct snd_dma_buffer *get_dmabuf(struct soundscape *s,
171                                          struct snd_dma_buffer *buf,
172                                          unsigned long size)
173 {
174         if (buf) {
175                 if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
176                                                  s->chip->card->dev,
177                                                  size, buf) < 0) {
178                         snd_printk(KERN_ERR "sscape: Failed to allocate "
179                                             "%lu bytes for DMA\n",
180                                             size);
181                         return NULL;
182                 }
183         }
184 
185         return buf;
186 }
187 
188 /*
189  * Release the DMA-able kernel memory ...
190  */
191 static void free_dmabuf(struct snd_dma_buffer *buf)
192 {
193         if (buf && buf->area)
194                 snd_dma_free_pages(buf);
195 }
196 
197 /*
198  * This function writes to the SoundScape's control registers,
199  * but doesn't do any locking. It's up to the caller to do that.
200  * This is why this function is "unsafe" ...
201  */
202 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg,
203                                        unsigned char val)
204 {
205         outb(reg, ODIE_ADDR_IO(io_base));
206         outb(val, ODIE_DATA_IO(io_base));
207 }
208 
209 /*
210  * Write to the SoundScape's control registers, and do the
211  * necessary locking ...
212  */
213 static void sscape_write(struct soundscape *s, enum GA_REG reg,
214                          unsigned char val)
215 {
216         unsigned long flags;
217 
218         spin_lock_irqsave(&s->lock, flags);
219         sscape_write_unsafe(s->io_base, reg, val);
220         spin_unlock_irqrestore(&s->lock, flags);
221 }
222 
223 /*
224  * Read from the SoundScape's control registers, but leave any
225  * locking to the caller. This is why the function is "unsafe" ...
226  */
227 static inline unsigned char sscape_read_unsafe(unsigned io_base,
228                                                enum GA_REG reg)
229 {
230         outb(reg, ODIE_ADDR_IO(io_base));
231         return inb(ODIE_DATA_IO(io_base));
232 }
233 
234 /*
235  * Puts the SoundScape into "host" mode, as compared to "MIDI" mode
236  */
237 static inline void set_host_mode_unsafe(unsigned io_base)
238 {
239         outb(0x0, HOST_CTRL_IO(io_base));
240 }
241 
242 /*
243  * Puts the SoundScape into "MIDI" mode, as compared to "host" mode
244  */
245 static inline void set_midi_mode_unsafe(unsigned io_base)
246 {
247         outb(0x3, HOST_CTRL_IO(io_base));
248 }
249 
250 /*
251  * Read the SoundScape's host-mode control register, but leave
252  * any locking issues to the caller ...
253  */
254 static inline int host_read_unsafe(unsigned io_base)
255 {
256         int data = -1;
257         if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0)
258                 data = inb(HOST_DATA_IO(io_base));
259 
260         return data;
261 }
262 
263 /*
264  * Read the SoundScape's host-mode control register, performing
265  * a limited amount of busy-waiting if the register isn't ready.
266  * Also leaves all locking-issues to the caller ...
267  */
268 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
269 {
270         int data;
271 
272         while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
273                 udelay(100);
274                 --timeout;
275         } /* while */
276 
277         return data;
278 }
279 
280 /*
281  * Write to the SoundScape's host-mode control registers, but
282  * leave any locking issues to the caller ...
283  */
284 static inline int host_write_unsafe(unsigned io_base, unsigned char data)
285 {
286         if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
287                 outb(data, HOST_DATA_IO(io_base));
288                 return 1;
289         }
290 
291         return 0;
292 }
293 
294 /*
295  * Write to the SoundScape's host-mode control registers, performing
296  * a limited amount of busy-waiting if the register isn't ready.
297  * Also leaves all locking-issues to the caller ...
298  */
299 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
300                                   unsigned timeout)
301 {
302         int err;
303 
304         while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
305                 udelay(100);
306                 --timeout;
307         } /* while */
308 
309         return err;
310 }
311 
312 
313 /*
314  * Check that the MIDI subsystem is operational. If it isn't,
315  * then we will hang the computer if we try to use it ...
316  *
317  * NOTE: This check is based upon observation, not documentation.
318  */
319 static inline int verify_mpu401(const struct snd_mpu401 *mpu)
320 {
321         return ((inb(MPU401C(mpu)) & 0xc0) == 0x80);
322 }
323 
324 /*
325  * This is apparently the standard way to initailise an MPU-401
326  */
327 static inline void initialise_mpu401(const struct snd_mpu401 *mpu)
328 {
329         outb(0, MPU401D(mpu));
330 }
331 
332 /*
333  * Tell the SoundScape to activate the AD1845 chip (I think).
334  * The AD1845 detection fails if we *don't* do this, so I
335  * think that this is a good idea ...
336  */
337 static void activate_ad1845_unsafe(unsigned io_base)
338 {
339         unsigned char val = sscape_read_unsafe(io_base, GA_HMCTL_REG);
340         sscape_write_unsafe(io_base, GA_HMCTL_REG, (val & 0xcf) | 0x10);
341         sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
342 }
343 
344 /*
345  * Do the necessary ALSA-level cleanup to deallocate our driver ...
346  */
347 static void soundscape_free(struct snd_card *c)
348 {
349         struct soundscape *sscape = get_card_soundscape(c);
350         release_and_free_resource(sscape->io_res);
351         release_and_free_resource(sscape->wss_res);
352         free_dma(sscape->chip->dma1);
353 }
354 
355 /*
356  * Tell the SoundScape to begin a DMA tranfer using the given channel.
357  * All locking issues are left to the caller.
358  */
359 static void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
360 {
361         sscape_write_unsafe(io_base, reg,
362                             sscape_read_unsafe(io_base, reg) | 0x01);
363         sscape_write_unsafe(io_base, reg,
364                             sscape_read_unsafe(io_base, reg) & 0xfe);
365 }
366 
367 /*
368  * Wait for a DMA transfer to complete. This is a "limited busy-wait",
369  * and all locking issues are left to the caller.
370  */
371 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg,
372                                   unsigned timeout)
373 {
374         while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
375                 udelay(100);
376                 --timeout;
377         } /* while */
378 
379         return sscape_read_unsafe(io_base, reg) & 0x01;
380 }
381 
382 /*
383  * Wait for the On-Board Processor to return its start-up
384  * acknowledgement sequence. This wait is too long for
385  * us to perform "busy-waiting", and so we must sleep.
386  * This in turn means that we must not be holding any
387  * spinlocks when we call this function.
388  */
389 static int obp_startup_ack(struct soundscape *s, unsigned timeout)
390 {
391         unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
392 
393         do {
394                 unsigned long flags;
395                 int x;
396 
397                 spin_lock_irqsave(&s->lock, flags);
398                 x = host_read_unsafe(s->io_base);
399                 spin_unlock_irqrestore(&s->lock, flags);
400                 if (x == 0xfe || x == 0xff)
401                         return 1;
402 
403                 msleep(10);
404         } while (time_before(jiffies, end_time));
405 
406         return 0;
407 }
408 
409 /*
410  * Wait for the host to return its start-up acknowledgement
411  * sequence. This wait is too long for us to perform
412  * "busy-waiting", and so we must sleep. This in turn means
413  * that we must not be holding any spinlocks when we call
414  * this function.
415  */
416 static int host_startup_ack(struct soundscape *s, unsigned timeout)
417 {
418         unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
419 
420         do {
421                 unsigned long flags;
422                 int x;
423 
424                 spin_lock_irqsave(&s->lock, flags);
425                 x = host_read_unsafe(s->io_base);
426                 spin_unlock_irqrestore(&s->lock, flags);
427                 if (x == 0xfe)
428                         return 1;
429 
430                 msleep(10);
431         } while (time_before(jiffies, end_time));
432 
433         return 0;
434 }
435 
436 /*
437  * Upload a byte-stream into the SoundScape using DMA channel A.
438  */
439 static int upload_dma_data(struct soundscape *s, const unsigned char *data,
440                            size_t size)
441 {
442         unsigned long flags;
443         struct snd_dma_buffer dma;
444         int ret;
445         unsigned char val;
446 
447         if (!get_dmabuf(s, &dma, PAGE_ALIGN(32 * 1024)))
448                 return -ENOMEM;
449 
450         spin_lock_irqsave(&s->lock, flags);
451 
452         /*
453          * Reset the board ...
454          */
455         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
456         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val & 0x3f);
457 
458         /*
459          * Enable the DMA channels and configure them ...
460          */
461         val = (s->chip->dma1 << 4) | DMA_8BIT;
462         sscape_write_unsafe(s->io_base, GA_DMAA_REG, val);
463         sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
464 
465         /*
466          * Take the board out of reset ...
467          */
468         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
469         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x80);
470 
471         /*
472          * Upload the firmware to the SoundScape
473          * board through the DMA channel ...
474          */
475         while (size != 0) {
476                 unsigned long len;
477 
478                 len = min(size, dma.bytes);
479                 memcpy(dma.area, data, len);
480                 data += len;
481                 size -= len;
482 
483                 snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
484                 sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
485                 if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
486                         /*
487                          * Don't forget to release this spinlock we're holding
488                          */
489                         spin_unlock_irqrestore(&s->lock, flags);
490 
491                         snd_printk(KERN_ERR
492                                         "sscape: DMA upload has timed out\n");
493                         ret = -EAGAIN;
494                         goto _release_dma;
495                 }
496         } /* while */
497 
498         set_host_mode_unsafe(s->io_base);
499         outb(0x0, s->io_base);
500 
501         /*
502          * Boot the board ... (I think)
503          */
504         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
505         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x40);
506         spin_unlock_irqrestore(&s->lock, flags);
507 
508         /*
509          * If all has gone well, then the board should acknowledge
510          * the new upload and tell us that it has rebooted OK. We
511          * give it 5 seconds (max) ...
512          */
513         ret = 0;
514         if (!obp_startup_ack(s, 5000)) {
515                 snd_printk(KERN_ERR "sscape: No response "
516                                     "from on-board processor after upload\n");
517                 ret = -EAGAIN;
518         } else if (!host_startup_ack(s, 5000)) {
519                 snd_printk(KERN_ERR
520                                 "sscape: SoundScape failed to initialise\n");
521                 ret = -EAGAIN;
522         }
523 
524 _release_dma:
525         /*
526          * NOTE!!! We are NOT holding any spinlocks at this point !!!
527          */
528         sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_OPUS ? 0x40 : 0x70));
529         free_dmabuf(&dma);
530 
531         return ret;
532 }
533 
534 /*
535  * Upload the bootblock(?) into the SoundScape. The only
536  * purpose of this block of code seems to be to tell
537  * us which version of the microcode we should be using.
538  */
539 static int sscape_upload_bootblock(struct snd_card *card)
540 {
541         struct soundscape *sscape = get_card_soundscape(card);
542         unsigned long flags;
543         const struct firmware *init_fw = NULL;
544         int data = 0;
545         int ret;
546 
547         ret = request_firmware(&init_fw, "scope.cod", card->dev);
548         if (ret < 0) {
549                 snd_printk(KERN_ERR "sscape: Error loading scope.cod");
550                 return ret;
551         }
552         ret = upload_dma_data(sscape, init_fw->data, init_fw->size);
553 
554         release_firmware(init_fw);
555 
556         spin_lock_irqsave(&sscape->lock, flags);
557         if (ret == 0)
558                 data = host_read_ctrl_unsafe(sscape->io_base, 100);
559 
560         if (data & 0x10)
561                 sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2f);
562 
563         spin_unlock_irqrestore(&sscape->lock, flags);
564 
565         data &= 0xf;
566         if (ret == 0 && data > 7) {
567                 snd_printk(KERN_ERR
568                                 "sscape: timeout reading firmware version\n");
569                 ret = -EAGAIN;
570         }
571 
572         return (ret == 0) ? data : ret;
573 }
574 
575 /*
576  * Upload the microcode into the SoundScape.
577  */
578 static int sscape_upload_microcode(struct snd_card *card, int version)
579 {
580         struct soundscape *sscape = get_card_soundscape(card);
581         const struct firmware *init_fw = NULL;
582         char name[14];
583         int err;
584 
585         snprintf(name, sizeof(name), "sndscape.co%d", version);
586 
587         err = request_firmware(&init_fw, name, card->dev);
588         if (err < 0) {
589                 snd_printk(KERN_ERR "sscape: Error loading sndscape.co%d",
590                                 version);
591                 return err;
592         }
593         err = upload_dma_data(sscape, init_fw->data, init_fw->size);
594         if (err == 0)
595                 snd_printk(KERN_INFO "sscape: MIDI firmware loaded %zu KBs\n",
596                                 init_fw->size >> 10);
597 
598         release_firmware(init_fw);
599 
600         return err;
601 }
602 
603 /*
604  * Mixer control for the SoundScape's MIDI device.
605  */
606 static int sscape_midi_info(struct snd_kcontrol *ctl,
607                             struct snd_ctl_elem_info *uinfo)
608 {
609         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
610         uinfo->count = 1;
611         uinfo->value.integer.min = 0;
612         uinfo->value.integer.max = 127;
613         return 0;
614 }
615 
616 static int sscape_midi_get(struct snd_kcontrol *kctl,
617                            struct snd_ctl_elem_value *uctl)
618 {
619         struct snd_wss *chip = snd_kcontrol_chip(kctl);
620         struct snd_card *card = chip->card;
621         register struct soundscape *s = get_card_soundscape(card);
622         unsigned long flags;
623 
624         spin_lock_irqsave(&s->lock, flags);
625         uctl->value.integer.value[0] = s->midi_vol;
626         spin_unlock_irqrestore(&s->lock, flags);
627         return 0;
628 }
629 
630 static int sscape_midi_put(struct snd_kcontrol *kctl,
631                            struct snd_ctl_elem_value *uctl)
632 {
633         struct snd_wss *chip = snd_kcontrol_chip(kctl);
634         struct snd_card *card = chip->card;
635         struct soundscape *s = get_card_soundscape(card);
636         unsigned long flags;
637         int change;
638         unsigned char new_val;
639 
640         spin_lock_irqsave(&s->lock, flags);
641 
642         new_val = uctl->value.integer.value[0] & 127;
643         /*
644          * We need to put the board into HOST mode before we
645          * can send any volume-changing HOST commands ...
646          */
647         set_host_mode_unsafe(s->io_base);
648 
649         /*
650          * To successfully change the MIDI volume setting, you seem to
651          * have to write a volume command, write the new volume value,
652          * and then perform another volume-related command. Perhaps the
653          * first command is an "open" and the second command is a "close"?
654          */
655         if (s->midi_vol == new_val) {
656                 change = 0;
657                 goto __skip_change;
658         }
659         change = host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
660                  && host_write_ctrl_unsafe(s->io_base, new_val, 100)
661                  && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100)
662                  && host_write_ctrl_unsafe(s->io_base, new_val, 100);
663         s->midi_vol = new_val;
664 __skip_change:
665 
666         /*
667          * Take the board out of HOST mode and back into MIDI mode ...
668          */
669         set_midi_mode_unsafe(s->io_base);
670 
671         spin_unlock_irqrestore(&s->lock, flags);
672         return change;
673 }
674 
675 static const struct snd_kcontrol_new midi_mixer_ctl = {
676         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
677         .name = "MIDI",
678         .info = sscape_midi_info,
679         .get = sscape_midi_get,
680         .put = sscape_midi_put
681 };
682 
683 /*
684  * The SoundScape can use two IRQs from a possible set of four.
685  * These IRQs are encoded as bit patterns so that they can be
686  * written to the control registers.
687  */
688 static unsigned get_irq_config(int sscape_type, int irq)
689 {
690         static const int valid_irq[] = { 9, 5, 7, 10 };
691         static const int old_irq[] = { 9, 7, 5, 15 };
692         unsigned cfg;
693 
694         if (sscape_type == MEDIA_FX) {
695                 for (cfg = 0; cfg < ARRAY_SIZE(old_irq); ++cfg)
696                         if (irq == old_irq[cfg])
697                                 return cfg;
698         } else {
699                 for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg)
700                         if (irq == valid_irq[cfg])
701                                 return cfg;
702         }
703 
704         return INVALID_IRQ;
705 }
706 
707 /*
708  * Perform certain arcane port-checks to see whether there
709  * is a SoundScape board lurking behind the given ports.
710  */
711 static int detect_sscape(struct soundscape *s, long wss_io)
712 {
713         unsigned long flags;
714         unsigned d;
715         int retval = 0;
716 
717         spin_lock_irqsave(&s->lock, flags);
718 
719         /*
720          * The following code is lifted from the original OSS driver,
721          * and as I don't have a datasheet I cannot really comment
722          * on what it is doing...
723          */
724         if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
725                 goto _done;
726 
727         d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
728         if ((d & 0x80) != 0)
729                 goto _done;
730 
731         if (d == 0)
732                 s->ic_type = IC_ODIE;
733         else if ((d & 0x60) != 0)
734                 s->ic_type = IC_OPUS;
735         else
736                 goto _done;
737 
738         outb(0xfa, ODIE_ADDR_IO(s->io_base));
739         if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
740                 goto _done;
741 
742         outb(0xfe, ODIE_ADDR_IO(s->io_base));
743         if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
744                 goto _done;
745 
746         outb(0xfe, ODIE_ADDR_IO(s->io_base));
747         d = inb(ODIE_DATA_IO(s->io_base));
748         if (s->type != SSCAPE_VIVO && (d & 0x9f) != 0x0e)
749                 goto _done;
750 
751         if (s->ic_type == IC_OPUS)
752                 activate_ad1845_unsafe(s->io_base);
753 
754         if (s->type == SSCAPE_VIVO)
755                 wss_io += 4;
756 
757         d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
758         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
759 
760         /* wait for WSS codec */
761         for (d = 0; d < 500; d++) {
762                 if ((inb(wss_io) & 0x80) == 0)
763                         break;
764                 spin_unlock_irqrestore(&s->lock, flags);
765                 msleep(1);
766                 spin_lock_irqsave(&s->lock, flags);
767         }
768 
769         if ((inb(wss_io) & 0x80) != 0)
770                 goto _done;
771 
772         if (inb(wss_io + 2) == 0xff)
773                 goto _done;
774 
775         d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f;
776         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d);
777 
778         if ((inb(wss_io) & 0x80) != 0)
779                 s->type = MEDIA_FX;
780 
781         d = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
782         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
783         /* wait for WSS codec */
784         for (d = 0; d < 500; d++) {
785                 if ((inb(wss_io) & 0x80) == 0)
786                         break;
787                 spin_unlock_irqrestore(&s->lock, flags);
788                 msleep(1);
789                 spin_lock_irqsave(&s->lock, flags);
790         }
791 
792         /*
793          * SoundScape successfully detected!
794          */
795         retval = 1;
796 
797 _done:
798         spin_unlock_irqrestore(&s->lock, flags);
799         return retval;
800 }
801 
802 /*
803  * ALSA callback function, called when attempting to open the MIDI device.
804  * Check that the MIDI firmware has been loaded, because we don't want
805  * to crash the machine. Also check that someone isn't using the hardware
806  * IOCTL device.
807  */
808 static int mpu401_open(struct snd_mpu401 *mpu)
809 {
810         if (!verify_mpu401(mpu)) {
811                 snd_printk(KERN_ERR "sscape: MIDI disabled, "
812                                     "please load firmware\n");
813                 return -ENODEV;
814         }
815 
816         return 0;
817 }
818 
819 /*
820  * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
821  */
822 static int create_mpu401(struct snd_card *card, int devnum,
823                          unsigned long port, int irq)
824 {
825         struct soundscape *sscape = get_card_soundscape(card);
826         struct snd_rawmidi *rawmidi;
827         int err;
828 
829         err = snd_mpu401_uart_new(card, devnum, MPU401_HW_MPU401, port,
830                                   MPU401_INFO_INTEGRATED, irq, &rawmidi);
831         if (err == 0) {
832                 struct snd_mpu401 *mpu = rawmidi->private_data;
833                 mpu->open_input = mpu401_open;
834                 mpu->open_output = mpu401_open;
835                 mpu->private_data = sscape;
836 
837                 initialise_mpu401(mpu);
838         }
839 
840         return err;
841 }
842 
843 
844 /*
845  * Create an AD1845 PCM subdevice on the SoundScape. The AD1845
846  * is very much like a CS4231, with a few extra bits. We will
847  * try to support at least some of the extra bits by overriding
848  * some of the CS4231 callback.
849  */
850 static int create_ad1845(struct snd_card *card, unsigned port,
851                          int irq, int dma1, int dma2)
852 {
853         register struct soundscape *sscape = get_card_soundscape(card);
854         struct snd_wss *chip;
855         int err;
856         int codec_type = WSS_HW_DETECT;
857 
858         switch (sscape->type) {
859         case MEDIA_FX:
860         case SSCAPE:
861                 /*
862                  * There are some freak examples of early Soundscape cards
863                  * with CS4231 instead of AD1848/CS4248. Unfortunately, the
864                  * CS4231 works only in CS4248 compatibility mode on
865                  * these cards so force it.
866                  */
867                 if (sscape->ic_type != IC_OPUS)
868                         codec_type = WSS_HW_AD1848;
869                 break;
870 
871         case SSCAPE_VIVO:
872                 port += 4;
873                 break;
874         default:
875                 break;
876         }
877 
878         err = snd_wss_create(card, port, -1, irq, dma1, dma2,
879                              codec_type, WSS_HWSHARE_DMA1, &chip);
880         if (!err) {
881                 unsigned long flags;
882 
883                 if (sscape->type != SSCAPE_VIVO) {
884                         /*
885                          * The input clock frequency on the SoundScape must
886                          * be 14.31818 MHz, because we must set this register
887                          * to get the playback to sound correct ...
888                          */
889                         snd_wss_mce_up(chip);
890                         spin_lock_irqsave(&chip->reg_lock, flags);
891                         snd_wss_out(chip, AD1845_CLOCK, 0x20);
892                         spin_unlock_irqrestore(&chip->reg_lock, flags);
893                         snd_wss_mce_down(chip);
894 
895                 }
896 
897                 err = snd_wss_pcm(chip, 0);
898                 if (err < 0) {
899                         snd_printk(KERN_ERR "sscape: No PCM device "
900                                             "for AD1845 chip\n");
901                         goto _error;
902                 }
903 
904                 err = snd_wss_mixer(chip);
905                 if (err < 0) {
906                         snd_printk(KERN_ERR "sscape: No mixer device "
907                                             "for AD1845 chip\n");
908                         goto _error;
909                 }
910                 if (chip->hardware != WSS_HW_AD1848) {
911                         err = snd_wss_timer(chip, 0);
912                         if (err < 0) {
913                                 snd_printk(KERN_ERR "sscape: No timer device "
914                                                     "for AD1845 chip\n");
915                                 goto _error;
916                         }
917                 }
918 
919                 if (sscape->type != SSCAPE_VIVO) {
920                         err = snd_ctl_add(card,
921                                           snd_ctl_new1(&midi_mixer_ctl, chip));
922                         if (err < 0) {
923                                 snd_printk(KERN_ERR "sscape: Could not create "
924                                                     "MIDI mixer control\n");
925                                 goto _error;
926                         }
927                 }
928 
929                 sscape->chip = chip;
930         }
931 
932 _error:
933         return err;
934 }
935 
936 
937 /*
938  * Create an ALSA soundcard entry for the SoundScape, using
939  * the given list of port, IRQ and DMA resources.
940  */
941 static int create_sscape(int dev, struct snd_card *card)
942 {
943         struct soundscape *sscape = get_card_soundscape(card);
944         unsigned dma_cfg;
945         unsigned irq_cfg;
946         unsigned mpu_irq_cfg;
947         struct resource *io_res;
948         struct resource *wss_res;
949         unsigned long flags;
950         int err;
951         int val;
952         const char *name;
953 
954         /*
955          * Grab IO ports that we will need to probe so that we
956          * can detect and control this hardware ...
957          */
958         io_res = request_region(port[dev], 8, "SoundScape");
959         if (!io_res) {
960                 snd_printk(KERN_ERR
961                            "sscape: can't grab port 0x%lx\n", port[dev]);
962                 return -EBUSY;
963         }
964         wss_res = NULL;
965         if (sscape->type == SSCAPE_VIVO) {
966                 wss_res = request_region(wss_port[dev], 4, "SoundScape");
967                 if (!wss_res) {
968                         snd_printk(KERN_ERR "sscape: can't grab port 0x%lx\n",
969                                             wss_port[dev]);
970                         err = -EBUSY;
971                         goto _release_region;
972                 }
973         }
974 
975         /*
976          * Grab one DMA channel ...
977          */
978         err = request_dma(dma[dev], "SoundScape");
979         if (err < 0) {
980                 snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]);
981                 goto _release_region;
982         }
983 
984         spin_lock_init(&sscape->lock);
985         sscape->io_res = io_res;
986         sscape->wss_res = wss_res;
987         sscape->io_base = port[dev];
988 
989         if (!detect_sscape(sscape, wss_port[dev])) {
990                 printk(KERN_ERR "sscape: hardware not detected at 0x%x\n",
991                         sscape->io_base);
992                 err = -ENODEV;
993                 goto _release_dma;
994         }
995 
996         switch (sscape->type) {
997         case MEDIA_FX:
998                 name = "MediaFX/SoundFX";
999                 break;
1000         case SSCAPE:
1001                 name = "Soundscape";
1002                 break;
1003         case SSCAPE_PNP:
1004                 name = "Soundscape PnP";
1005                 break;
1006         case SSCAPE_VIVO:
1007                 name = "Soundscape VIVO";
1008                 break;
1009         default:
1010                 name = "unknown Soundscape";
1011                 break;
1012         }
1013 
1014         printk(KERN_INFO "sscape: %s card detected at 0x%x, using IRQ %d, DMA %d\n",
1015                          name, sscape->io_base, irq[dev], dma[dev]);
1016 
1017         /*
1018          * Check that the user didn't pass us garbage data ...
1019          */
1020         irq_cfg = get_irq_config(sscape->type, irq[dev]);
1021         if (irq_cfg == INVALID_IRQ) {
1022                 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]);
1023                 err = -ENXIO;
1024                 goto _release_dma;
1025         }
1026 
1027         mpu_irq_cfg = get_irq_config(sscape->type, mpu_irq[dev]);
1028         if (mpu_irq_cfg == INVALID_IRQ) {
1029                 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
1030                 err = -ENXIO;
1031                 goto _release_dma;
1032         }
1033 
1034         /*
1035          * Tell the on-board devices where their resources are (I think -
1036          * I can't be sure without a datasheet ... So many magic values!)
1037          */
1038         spin_lock_irqsave(&sscape->lock, flags);
1039 
1040         sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
1041         sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
1042 
1043         /*
1044          * Enable and configure the DMA channels ...
1045          */
1046         sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
1047         dma_cfg = (sscape->ic_type == IC_OPUS ? 0x40 : 0x70);
1048         sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
1049         sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
1050 
1051         mpu_irq_cfg |= mpu_irq_cfg << 2;
1052         val = sscape_read_unsafe(sscape->io_base, GA_HMCTL_REG) & 0xF7;
1053         if (joystick[dev])
1054                 val |= 8;
1055         sscape_write_unsafe(sscape->io_base, GA_HMCTL_REG, val | 0x10);
1056         sscape_write_unsafe(sscape->io_base, GA_INTCFG_REG, 0xf0 | mpu_irq_cfg);
1057         sscape_write_unsafe(sscape->io_base,
1058                             GA_CDCFG_REG, 0x09 | DMA_8BIT
1059                             | (dma[dev] << 4) | (irq_cfg << 1));
1060         /*
1061          * Enable the master IRQ ...
1062          */
1063         sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x80);
1064 
1065         spin_unlock_irqrestore(&sscape->lock, flags);
1066 
1067         /*
1068          * We have now enabled the codec chip, and so we should
1069          * detect the AD1845 device ...
1070          */
1071         err = create_ad1845(card, wss_port[dev], irq[dev],
1072                             dma[dev], dma2[dev]);
1073         if (err < 0) {
1074                 snd_printk(KERN_ERR
1075                                 "sscape: No AD1845 device at 0x%lx, IRQ %d\n",
1076                                 wss_port[dev], irq[dev]);
1077                 goto _release_dma;
1078         }
1079         strcpy(card->driver, "SoundScape");
1080         strcpy(card->shortname, name);
1081         snprintf(card->longname, sizeof(card->longname),
1082                  "%s at 0x%lx, IRQ %d, DMA1 %d, DMA2 %d\n",
1083                  name, sscape->chip->port, sscape->chip->irq,
1084                  sscape->chip->dma1, sscape->chip->dma2);
1085 
1086 #define MIDI_DEVNUM  0
1087         if (sscape->type != SSCAPE_VIVO) {
1088                 err = sscape_upload_bootblock(card);
1089                 if (err >= 0)
1090                         err = sscape_upload_microcode(card, err);
1091 
1092                 if (err == 0) {
1093                         err = create_mpu401(card, MIDI_DEVNUM, port[dev],
1094                                             mpu_irq[dev]);
1095                         if (err < 0) {
1096                                 snd_printk(KERN_ERR "sscape: Failed to create "
1097                                                 "MPU-401 device at 0x%lx\n",
1098                                                 port[dev]);
1099                                 goto _release_dma;
1100                         }
1101 
1102                         /*
1103                          * Initialize mixer
1104                          */
1105                         spin_lock_irqsave(&sscape->lock, flags);
1106                         sscape->midi_vol = 0;
1107                         host_write_ctrl_unsafe(sscape->io_base,
1108                                                 CMD_SET_MIDI_VOL, 100);
1109                         host_write_ctrl_unsafe(sscape->io_base,
1110                                                 sscape->midi_vol, 100);
1111                         host_write_ctrl_unsafe(sscape->io_base,
1112                                                 CMD_XXX_MIDI_VOL, 100);
1113                         host_write_ctrl_unsafe(sscape->io_base,
1114                                                 sscape->midi_vol, 100);
1115                         host_write_ctrl_unsafe(sscape->io_base,
1116                                                 CMD_SET_EXTMIDI, 100);
1117                         host_write_ctrl_unsafe(sscape->io_base,
1118                                                 0, 100);
1119                         host_write_ctrl_unsafe(sscape->io_base, CMD_ACK, 100);
1120 
1121                         set_midi_mode_unsafe(sscape->io_base);
1122                         spin_unlock_irqrestore(&sscape->lock, flags);
1123                 }
1124         }
1125 
1126         /*
1127          * Now that we have successfully created this sound card,
1128          * it is safe to store the pointer.
1129          * NOTE: we only register the sound card's "destructor"
1130          *       function now that our "constructor" has completed.
1131          */
1132         card->private_free = soundscape_free;
1133 
1134         return 0;
1135 
1136 _release_dma:
1137         free_dma(dma[dev]);
1138 
1139 _release_region:
1140         release_and_free_resource(wss_res);
1141         release_and_free_resource(io_res);
1142 
1143         return err;
1144 }
1145 
1146 
1147 static int snd_sscape_match(struct device *pdev, unsigned int i)
1148 {
1149         /*
1150          * Make sure we were given ALL of the other parameters.
1151          */
1152         if (port[i] == SNDRV_AUTO_PORT)
1153                 return 0;
1154 
1155         if (irq[i] == SNDRV_AUTO_IRQ ||
1156             mpu_irq[i] == SNDRV_AUTO_IRQ ||
1157             dma[i] == SNDRV_AUTO_DMA) {
1158                 printk(KERN_INFO
1159                        "sscape: insufficient parameters, "
1160                        "need IO, IRQ, MPU-IRQ and DMA\n");
1161                 return 0;
1162         }
1163 
1164         return 1;
1165 }
1166 
1167 static int snd_sscape_probe(struct device *pdev, unsigned int dev)
1168 {
1169         struct snd_card *card;
1170         struct soundscape *sscape;
1171         int ret;
1172 
1173         ret = snd_card_new(pdev, index[dev], id[dev], THIS_MODULE,
1174                            sizeof(struct soundscape), &card);
1175         if (ret < 0)
1176                 return ret;
1177 
1178         sscape = get_card_soundscape(card);
1179         sscape->type = SSCAPE;
1180 
1181         dma[dev] &= 0x03;
1182 
1183         ret = create_sscape(dev, card);
1184         if (ret < 0)
1185                 goto _release_card;
1186 
1187         ret = snd_card_register(card);
1188         if (ret < 0) {
1189                 snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1190                 goto _release_card;
1191         }
1192         dev_set_drvdata(pdev, card);
1193         return 0;
1194 
1195 _release_card:
1196         snd_card_free(card);
1197         return ret;
1198 }
1199 
1200 static int snd_sscape_remove(struct device *devptr, unsigned int dev)
1201 {
1202         snd_card_free(dev_get_drvdata(devptr));
1203         return 0;
1204 }
1205 
1206 #define DEV_NAME "sscape"
1207 
1208 static struct isa_driver snd_sscape_driver = {
1209         .match          = snd_sscape_match,
1210         .probe          = snd_sscape_probe,
1211         .remove         = snd_sscape_remove,
1212         /* FIXME: suspend/resume */
1213         .driver         = {
1214                 .name   = DEV_NAME
1215         },
1216 };
1217 
1218 #ifdef CONFIG_PNP
1219 static inline int get_next_autoindex(int i)
1220 {
1221         while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT)
1222                 ++i;
1223         return i;
1224 }
1225 
1226 
1227 static int sscape_pnp_detect(struct pnp_card_link *pcard,
1228                              const struct pnp_card_device_id *pid)
1229 {
1230         static int idx = 0;
1231         struct pnp_dev *dev;
1232         struct snd_card *card;
1233         struct soundscape *sscape;
1234         int ret;
1235 
1236         /*
1237          * Allow this function to fail *quietly* if all the ISA PnP
1238          * devices were configured using module parameters instead.
1239          */
1240         idx = get_next_autoindex(idx);
1241         if (idx >= SNDRV_CARDS)
1242                 return -ENOSPC;
1243 
1244         /*
1245          * Check that we still have room for another sound card ...
1246          */
1247         dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
1248         if (!dev)
1249                 return -ENODEV;
1250 
1251         if (!pnp_is_active(dev)) {
1252                 if (pnp_activate_dev(dev) < 0) {
1253                         snd_printk(KERN_INFO "sscape: device is inactive\n");
1254                         return -EBUSY;
1255                 }
1256         }
1257 
1258         /*
1259          * Create a new ALSA sound card entry, in anticipation
1260          * of detecting our hardware ...
1261          */
1262         ret = snd_card_new(&pcard->card->dev,
1263                            index[idx], id[idx], THIS_MODULE,
1264                            sizeof(struct soundscape), &card);
1265         if (ret < 0)
1266                 return ret;
1267 
1268         sscape = get_card_soundscape(card);
1269 
1270         /*
1271          * Identify card model ...
1272          */
1273         if (!strncmp("ENS4081", pid->id, 7))
1274                 sscape->type = SSCAPE_VIVO;
1275         else
1276                 sscape->type = SSCAPE_PNP;
1277 
1278         /*
1279          * Read the correct parameters off the ISA PnP bus ...
1280          */
1281         port[idx] = pnp_port_start(dev, 0);
1282         irq[idx] = pnp_irq(dev, 0);
1283         mpu_irq[idx] = pnp_irq(dev, 1);
1284         dma[idx] = pnp_dma(dev, 0) & 0x03;
1285         if (sscape->type == SSCAPE_PNP) {
1286                 dma2[idx] = dma[idx];
1287                 wss_port[idx] = CODEC_IO(port[idx]);
1288         } else {
1289                 wss_port[idx] = pnp_port_start(dev, 1);
1290                 dma2[idx] = pnp_dma(dev, 1);
1291         }
1292 
1293         ret = create_sscape(idx, card);
1294         if (ret < 0)
1295                 goto _release_card;
1296 
1297         ret = snd_card_register(card);
1298         if (ret < 0) {
1299                 snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1300                 goto _release_card;
1301         }
1302 
1303         pnp_set_card_drvdata(pcard, card);
1304         ++idx;
1305         return 0;
1306 
1307 _release_card:
1308         snd_card_free(card);
1309         return ret;
1310 }
1311 
1312 static void sscape_pnp_remove(struct pnp_card_link *pcard)
1313 {
1314         snd_card_free(pnp_get_card_drvdata(pcard));
1315         pnp_set_card_drvdata(pcard, NULL);
1316 }
1317 
1318 static struct pnp_card_driver sscape_pnpc_driver = {
1319         .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1320         .name = "sscape",
1321         .id_table = sscape_pnpids,
1322         .probe = sscape_pnp_detect,
1323         .remove = sscape_pnp_remove,
1324 };
1325 
1326 #endif /* CONFIG_PNP */
1327 
1328 static int __init sscape_init(void)
1329 {
1330         int err;
1331 
1332         err = isa_register_driver(&snd_sscape_driver, SNDRV_CARDS);
1333 #ifdef CONFIG_PNP
1334         if (!err)
1335                 isa_registered = 1;
1336 
1337         err = pnp_register_card_driver(&sscape_pnpc_driver);
1338         if (!err)
1339                 pnp_registered = 1;
1340 
1341         if (isa_registered)
1342                 err = 0;
1343 #endif
1344         return err;
1345 }
1346 
1347 static void __exit sscape_exit(void)
1348 {
1349 #ifdef CONFIG_PNP
1350         if (pnp_registered)
1351                 pnp_unregister_card_driver(&sscape_pnpc_driver);
1352         if (isa_registered)
1353 #endif
1354                 isa_unregister_driver(&snd_sscape_driver);
1355 }
1356 
1357 module_init(sscape_init);
1358 module_exit(sscape_exit);
1359 

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