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Linux/sound/isa/sscape.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  *   Low-level ALSA driver for the ENSONIQ SoundScape
  4  *   Copyright (c) by Chris Rankin
  5  *
  6  *   This driver was written in part using information obtained from
  7  *   the OSS/Free SoundScape driver, written by Hannu Savolainen.
  8  */
  9 
 10 #include <linux/init.h>
 11 #include <linux/err.h>
 12 #include <linux/io.h>
 13 #include <linux/isa.h>
 14 #include <linux/delay.h>
 15 #include <linux/firmware.h>
 16 #include <linux/pnp.h>
 17 #include <linux/spinlock.h>
 18 #include <linux/module.h>
 19 #include <asm/dma.h>
 20 #include <sound/core.h>
 21 #include <sound/wss.h>
 22 #include <sound/mpu401.h>
 23 #include <sound/initval.h>
 24 
 25 
 26 MODULE_AUTHOR("Chris Rankin");
 27 MODULE_DESCRIPTION("ENSONIQ SoundScape driver");
 28 MODULE_LICENSE("GPL");
 29 MODULE_FIRMWARE("sndscape.co0");
 30 MODULE_FIRMWARE("sndscape.co1");
 31 MODULE_FIRMWARE("sndscape.co2");
 32 MODULE_FIRMWARE("sndscape.co3");
 33 MODULE_FIRMWARE("sndscape.co4");
 34 MODULE_FIRMWARE("scope.cod");
 35 
 36 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 37 static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 38 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
 39 static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
 40 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
 41 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
 42 static int dma[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
 43 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
 44 static bool joystick[SNDRV_CARDS];
 45 
 46 module_param_array(index, int, NULL, 0444);
 47 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
 48 
 49 module_param_array(id, charp, NULL, 0444);
 50 MODULE_PARM_DESC(id, "Description for SoundScape card");
 51 
 52 module_param_hw_array(port, long, ioport, NULL, 0444);
 53 MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
 54 
 55 module_param_hw_array(wss_port, long, ioport, NULL, 0444);
 56 MODULE_PARM_DESC(wss_port, "WSS Port # for SoundScape driver.");
 57 
 58 module_param_hw_array(irq, int, irq, NULL, 0444);
 59 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
 60 
 61 module_param_hw_array(mpu_irq, int, irq, NULL, 0444);
 62 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
 63 
 64 module_param_hw_array(dma, int, dma, NULL, 0444);
 65 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
 66 
 67 module_param_hw_array(dma2, int, dma, NULL, 0444);
 68 MODULE_PARM_DESC(dma2, "DMA2 # for SoundScape driver.");
 69 
 70 module_param_array(joystick, bool, NULL, 0444);
 71 MODULE_PARM_DESC(joystick, "Enable gameport.");
 72 
 73 #ifdef CONFIG_PNP
 74 static int isa_registered;
 75 static int pnp_registered;
 76 
 77 static const struct pnp_card_device_id sscape_pnpids[] = {
 78         { .id = "ENS3081", .devs = { { "ENS0000" } } }, /* Soundscape PnP */
 79         { .id = "ENS4081", .devs = { { "ENS1011" } } }, /* VIVO90 */
 80         { .id = "" }    /* end */
 81 };
 82 
 83 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
 84 #endif
 85 
 86 
 87 #define HOST_CTRL_IO(i)  ((i) + 2)
 88 #define HOST_DATA_IO(i)  ((i) + 3)
 89 #define ODIE_ADDR_IO(i)  ((i) + 4)
 90 #define ODIE_DATA_IO(i)  ((i) + 5)
 91 #define CODEC_IO(i)      ((i) + 8)
 92 
 93 #define IC_ODIE  1
 94 #define IC_OPUS  2
 95 
 96 #define RX_READY 0x01
 97 #define TX_READY 0x02
 98 
 99 #define CMD_ACK                 0x80
100 #define CMD_SET_MIDI_VOL        0x84
101 #define CMD_GET_MIDI_VOL        0x85
102 #define CMD_XXX_MIDI_VOL        0x86
103 #define CMD_SET_EXTMIDI         0x8a
104 #define CMD_GET_EXTMIDI         0x8b
105 #define CMD_SET_MT32            0x8c
106 #define CMD_GET_MT32            0x8d
107 
108 enum GA_REG {
109         GA_INTSTAT_REG = 0,
110         GA_INTENA_REG,
111         GA_DMAA_REG,
112         GA_DMAB_REG,
113         GA_INTCFG_REG,
114         GA_DMACFG_REG,
115         GA_CDCFG_REG,
116         GA_SMCFGA_REG,
117         GA_SMCFGB_REG,
118         GA_HMCTL_REG
119 };
120 
121 #define DMA_8BIT  0x80
122 
123 
124 enum card_type {
125         MEDIA_FX,       /* Sequoia S-1000 */
126         SSCAPE,         /* Sequoia S-2000 */
127         SSCAPE_PNP,
128         SSCAPE_VIVO,
129 };
130 
131 struct soundscape {
132         spinlock_t lock;
133         unsigned io_base;
134         int ic_type;
135         enum card_type type;
136         struct resource *io_res;
137         struct resource *wss_res;
138         struct snd_wss *chip;
139 
140         unsigned char midi_vol;
141 };
142 
143 #define INVALID_IRQ  ((unsigned)-1)
144 
145 
146 static inline struct soundscape *get_card_soundscape(struct snd_card *c)
147 {
148         return (struct soundscape *) (c->private_data);
149 }
150 
151 /*
152  * Allocates some kernel memory that we can use for DMA.
153  * I think this means that the memory has to map to
154  * contiguous pages of physical memory.
155  */
156 static struct snd_dma_buffer *get_dmabuf(struct soundscape *s,
157                                          struct snd_dma_buffer *buf,
158                                          unsigned long size)
159 {
160         if (buf) {
161                 if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
162                                                  s->chip->card->dev,
163                                                  size, buf) < 0) {
164                         snd_printk(KERN_ERR "sscape: Failed to allocate "
165                                             "%lu bytes for DMA\n",
166                                             size);
167                         return NULL;
168                 }
169         }
170 
171         return buf;
172 }
173 
174 /*
175  * Release the DMA-able kernel memory ...
176  */
177 static void free_dmabuf(struct snd_dma_buffer *buf)
178 {
179         if (buf && buf->area)
180                 snd_dma_free_pages(buf);
181 }
182 
183 /*
184  * This function writes to the SoundScape's control registers,
185  * but doesn't do any locking. It's up to the caller to do that.
186  * This is why this function is "unsafe" ...
187  */
188 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg,
189                                        unsigned char val)
190 {
191         outb(reg, ODIE_ADDR_IO(io_base));
192         outb(val, ODIE_DATA_IO(io_base));
193 }
194 
195 /*
196  * Write to the SoundScape's control registers, and do the
197  * necessary locking ...
198  */
199 static void sscape_write(struct soundscape *s, enum GA_REG reg,
200                          unsigned char val)
201 {
202         unsigned long flags;
203 
204         spin_lock_irqsave(&s->lock, flags);
205         sscape_write_unsafe(s->io_base, reg, val);
206         spin_unlock_irqrestore(&s->lock, flags);
207 }
208 
209 /*
210  * Read from the SoundScape's control registers, but leave any
211  * locking to the caller. This is why the function is "unsafe" ...
212  */
213 static inline unsigned char sscape_read_unsafe(unsigned io_base,
214                                                enum GA_REG reg)
215 {
216         outb(reg, ODIE_ADDR_IO(io_base));
217         return inb(ODIE_DATA_IO(io_base));
218 }
219 
220 /*
221  * Puts the SoundScape into "host" mode, as compared to "MIDI" mode
222  */
223 static inline void set_host_mode_unsafe(unsigned io_base)
224 {
225         outb(0x0, HOST_CTRL_IO(io_base));
226 }
227 
228 /*
229  * Puts the SoundScape into "MIDI" mode, as compared to "host" mode
230  */
231 static inline void set_midi_mode_unsafe(unsigned io_base)
232 {
233         outb(0x3, HOST_CTRL_IO(io_base));
234 }
235 
236 /*
237  * Read the SoundScape's host-mode control register, but leave
238  * any locking issues to the caller ...
239  */
240 static inline int host_read_unsafe(unsigned io_base)
241 {
242         int data = -1;
243         if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0)
244                 data = inb(HOST_DATA_IO(io_base));
245 
246         return data;
247 }
248 
249 /*
250  * Read the SoundScape's host-mode control register, performing
251  * a limited amount of busy-waiting if the register isn't ready.
252  * Also leaves all locking-issues to the caller ...
253  */
254 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
255 {
256         int data;
257 
258         while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
259                 udelay(100);
260                 --timeout;
261         } /* while */
262 
263         return data;
264 }
265 
266 /*
267  * Write to the SoundScape's host-mode control registers, but
268  * leave any locking issues to the caller ...
269  */
270 static inline int host_write_unsafe(unsigned io_base, unsigned char data)
271 {
272         if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
273                 outb(data, HOST_DATA_IO(io_base));
274                 return 1;
275         }
276 
277         return 0;
278 }
279 
280 /*
281  * Write to the SoundScape's host-mode control registers, performing
282  * a limited amount of busy-waiting if the register isn't ready.
283  * Also leaves all locking-issues to the caller ...
284  */
285 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
286                                   unsigned timeout)
287 {
288         int err;
289 
290         while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
291                 udelay(100);
292                 --timeout;
293         } /* while */
294 
295         return err;
296 }
297 
298 
299 /*
300  * Check that the MIDI subsystem is operational. If it isn't,
301  * then we will hang the computer if we try to use it ...
302  *
303  * NOTE: This check is based upon observation, not documentation.
304  */
305 static inline int verify_mpu401(const struct snd_mpu401 *mpu)
306 {
307         return ((inb(MPU401C(mpu)) & 0xc0) == 0x80);
308 }
309 
310 /*
311  * This is apparently the standard way to initailise an MPU-401
312  */
313 static inline void initialise_mpu401(const struct snd_mpu401 *mpu)
314 {
315         outb(0, MPU401D(mpu));
316 }
317 
318 /*
319  * Tell the SoundScape to activate the AD1845 chip (I think).
320  * The AD1845 detection fails if we *don't* do this, so I
321  * think that this is a good idea ...
322  */
323 static void activate_ad1845_unsafe(unsigned io_base)
324 {
325         unsigned char val = sscape_read_unsafe(io_base, GA_HMCTL_REG);
326         sscape_write_unsafe(io_base, GA_HMCTL_REG, (val & 0xcf) | 0x10);
327         sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
328 }
329 
330 /*
331  * Do the necessary ALSA-level cleanup to deallocate our driver ...
332  */
333 static void soundscape_free(struct snd_card *c)
334 {
335         struct soundscape *sscape = get_card_soundscape(c);
336         release_and_free_resource(sscape->io_res);
337         release_and_free_resource(sscape->wss_res);
338         free_dma(sscape->chip->dma1);
339 }
340 
341 /*
342  * Tell the SoundScape to begin a DMA tranfer using the given channel.
343  * All locking issues are left to the caller.
344  */
345 static void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
346 {
347         sscape_write_unsafe(io_base, reg,
348                             sscape_read_unsafe(io_base, reg) | 0x01);
349         sscape_write_unsafe(io_base, reg,
350                             sscape_read_unsafe(io_base, reg) & 0xfe);
351 }
352 
353 /*
354  * Wait for a DMA transfer to complete. This is a "limited busy-wait",
355  * and all locking issues are left to the caller.
356  */
357 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg,
358                                   unsigned timeout)
359 {
360         while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
361                 udelay(100);
362                 --timeout;
363         } /* while */
364 
365         return sscape_read_unsafe(io_base, reg) & 0x01;
366 }
367 
368 /*
369  * Wait for the On-Board Processor to return its start-up
370  * acknowledgement sequence. This wait is too long for
371  * us to perform "busy-waiting", and so we must sleep.
372  * This in turn means that we must not be holding any
373  * spinlocks when we call this function.
374  */
375 static int obp_startup_ack(struct soundscape *s, unsigned timeout)
376 {
377         unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
378 
379         do {
380                 unsigned long flags;
381                 int x;
382 
383                 spin_lock_irqsave(&s->lock, flags);
384                 x = host_read_unsafe(s->io_base);
385                 spin_unlock_irqrestore(&s->lock, flags);
386                 if (x == 0xfe || x == 0xff)
387                         return 1;
388 
389                 msleep(10);
390         } while (time_before(jiffies, end_time));
391 
392         return 0;
393 }
394 
395 /*
396  * Wait for the host to return its start-up acknowledgement
397  * sequence. This wait is too long for us to perform
398  * "busy-waiting", and so we must sleep. This in turn means
399  * that we must not be holding any spinlocks when we call
400  * this function.
401  */
402 static int host_startup_ack(struct soundscape *s, unsigned timeout)
403 {
404         unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
405 
406         do {
407                 unsigned long flags;
408                 int x;
409 
410                 spin_lock_irqsave(&s->lock, flags);
411                 x = host_read_unsafe(s->io_base);
412                 spin_unlock_irqrestore(&s->lock, flags);
413                 if (x == 0xfe)
414                         return 1;
415 
416                 msleep(10);
417         } while (time_before(jiffies, end_time));
418 
419         return 0;
420 }
421 
422 /*
423  * Upload a byte-stream into the SoundScape using DMA channel A.
424  */
425 static int upload_dma_data(struct soundscape *s, const unsigned char *data,
426                            size_t size)
427 {
428         unsigned long flags;
429         struct snd_dma_buffer dma;
430         int ret;
431         unsigned char val;
432 
433         if (!get_dmabuf(s, &dma, PAGE_ALIGN(32 * 1024)))
434                 return -ENOMEM;
435 
436         spin_lock_irqsave(&s->lock, flags);
437 
438         /*
439          * Reset the board ...
440          */
441         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
442         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val & 0x3f);
443 
444         /*
445          * Enable the DMA channels and configure them ...
446          */
447         val = (s->chip->dma1 << 4) | DMA_8BIT;
448         sscape_write_unsafe(s->io_base, GA_DMAA_REG, val);
449         sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
450 
451         /*
452          * Take the board out of reset ...
453          */
454         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
455         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x80);
456 
457         /*
458          * Upload the firmware to the SoundScape
459          * board through the DMA channel ...
460          */
461         while (size != 0) {
462                 unsigned long len;
463 
464                 len = min(size, dma.bytes);
465                 memcpy(dma.area, data, len);
466                 data += len;
467                 size -= len;
468 
469                 snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
470                 sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
471                 if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
472                         /*
473                          * Don't forget to release this spinlock we're holding
474                          */
475                         spin_unlock_irqrestore(&s->lock, flags);
476 
477                         snd_printk(KERN_ERR
478                                         "sscape: DMA upload has timed out\n");
479                         ret = -EAGAIN;
480                         goto _release_dma;
481                 }
482         } /* while */
483 
484         set_host_mode_unsafe(s->io_base);
485         outb(0x0, s->io_base);
486 
487         /*
488          * Boot the board ... (I think)
489          */
490         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
491         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x40);
492         spin_unlock_irqrestore(&s->lock, flags);
493 
494         /*
495          * If all has gone well, then the board should acknowledge
496          * the new upload and tell us that it has rebooted OK. We
497          * give it 5 seconds (max) ...
498          */
499         ret = 0;
500         if (!obp_startup_ack(s, 5000)) {
501                 snd_printk(KERN_ERR "sscape: No response "
502                                     "from on-board processor after upload\n");
503                 ret = -EAGAIN;
504         } else if (!host_startup_ack(s, 5000)) {
505                 snd_printk(KERN_ERR
506                                 "sscape: SoundScape failed to initialise\n");
507                 ret = -EAGAIN;
508         }
509 
510 _release_dma:
511         /*
512          * NOTE!!! We are NOT holding any spinlocks at this point !!!
513          */
514         sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_OPUS ? 0x40 : 0x70));
515         free_dmabuf(&dma);
516 
517         return ret;
518 }
519 
520 /*
521  * Upload the bootblock(?) into the SoundScape. The only
522  * purpose of this block of code seems to be to tell
523  * us which version of the microcode we should be using.
524  */
525 static int sscape_upload_bootblock(struct snd_card *card)
526 {
527         struct soundscape *sscape = get_card_soundscape(card);
528         unsigned long flags;
529         const struct firmware *init_fw = NULL;
530         int data = 0;
531         int ret;
532 
533         ret = request_firmware(&init_fw, "scope.cod", card->dev);
534         if (ret < 0) {
535                 snd_printk(KERN_ERR "sscape: Error loading scope.cod");
536                 return ret;
537         }
538         ret = upload_dma_data(sscape, init_fw->data, init_fw->size);
539 
540         release_firmware(init_fw);
541 
542         spin_lock_irqsave(&sscape->lock, flags);
543         if (ret == 0)
544                 data = host_read_ctrl_unsafe(sscape->io_base, 100);
545 
546         if (data & 0x10)
547                 sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2f);
548 
549         spin_unlock_irqrestore(&sscape->lock, flags);
550 
551         data &= 0xf;
552         if (ret == 0 && data > 7) {
553                 snd_printk(KERN_ERR
554                                 "sscape: timeout reading firmware version\n");
555                 ret = -EAGAIN;
556         }
557 
558         return (ret == 0) ? data : ret;
559 }
560 
561 /*
562  * Upload the microcode into the SoundScape.
563  */
564 static int sscape_upload_microcode(struct snd_card *card, int version)
565 {
566         struct soundscape *sscape = get_card_soundscape(card);
567         const struct firmware *init_fw = NULL;
568         char name[14];
569         int err;
570 
571         snprintf(name, sizeof(name), "sndscape.co%d", version);
572 
573         err = request_firmware(&init_fw, name, card->dev);
574         if (err < 0) {
575                 snd_printk(KERN_ERR "sscape: Error loading sndscape.co%d",
576                                 version);
577                 return err;
578         }
579         err = upload_dma_data(sscape, init_fw->data, init_fw->size);
580         if (err == 0)
581                 snd_printk(KERN_INFO "sscape: MIDI firmware loaded %zu KBs\n",
582                                 init_fw->size >> 10);
583 
584         release_firmware(init_fw);
585 
586         return err;
587 }
588 
589 /*
590  * Mixer control for the SoundScape's MIDI device.
591  */
592 static int sscape_midi_info(struct snd_kcontrol *ctl,
593                             struct snd_ctl_elem_info *uinfo)
594 {
595         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
596         uinfo->count = 1;
597         uinfo->value.integer.min = 0;
598         uinfo->value.integer.max = 127;
599         return 0;
600 }
601 
602 static int sscape_midi_get(struct snd_kcontrol *kctl,
603                            struct snd_ctl_elem_value *uctl)
604 {
605         struct snd_wss *chip = snd_kcontrol_chip(kctl);
606         struct snd_card *card = chip->card;
607         register struct soundscape *s = get_card_soundscape(card);
608         unsigned long flags;
609 
610         spin_lock_irqsave(&s->lock, flags);
611         uctl->value.integer.value[0] = s->midi_vol;
612         spin_unlock_irqrestore(&s->lock, flags);
613         return 0;
614 }
615 
616 static int sscape_midi_put(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         struct soundscape *s = get_card_soundscape(card);
622         unsigned long flags;
623         int change;
624         unsigned char new_val;
625 
626         spin_lock_irqsave(&s->lock, flags);
627 
628         new_val = uctl->value.integer.value[0] & 127;
629         /*
630          * We need to put the board into HOST mode before we
631          * can send any volume-changing HOST commands ...
632          */
633         set_host_mode_unsafe(s->io_base);
634 
635         /*
636          * To successfully change the MIDI volume setting, you seem to
637          * have to write a volume command, write the new volume value,
638          * and then perform another volume-related command. Perhaps the
639          * first command is an "open" and the second command is a "close"?
640          */
641         if (s->midi_vol == new_val) {
642                 change = 0;
643                 goto __skip_change;
644         }
645         change = host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
646                  && host_write_ctrl_unsafe(s->io_base, new_val, 100)
647                  && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100)
648                  && host_write_ctrl_unsafe(s->io_base, new_val, 100);
649         s->midi_vol = new_val;
650 __skip_change:
651 
652         /*
653          * Take the board out of HOST mode and back into MIDI mode ...
654          */
655         set_midi_mode_unsafe(s->io_base);
656 
657         spin_unlock_irqrestore(&s->lock, flags);
658         return change;
659 }
660 
661 static const struct snd_kcontrol_new midi_mixer_ctl = {
662         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
663         .name = "MIDI",
664         .info = sscape_midi_info,
665         .get = sscape_midi_get,
666         .put = sscape_midi_put
667 };
668 
669 /*
670  * The SoundScape can use two IRQs from a possible set of four.
671  * These IRQs are encoded as bit patterns so that they can be
672  * written to the control registers.
673  */
674 static unsigned get_irq_config(int sscape_type, int irq)
675 {
676         static const int valid_irq[] = { 9, 5, 7, 10 };
677         static const int old_irq[] = { 9, 7, 5, 15 };
678         unsigned cfg;
679 
680         if (sscape_type == MEDIA_FX) {
681                 for (cfg = 0; cfg < ARRAY_SIZE(old_irq); ++cfg)
682                         if (irq == old_irq[cfg])
683                                 return cfg;
684         } else {
685                 for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg)
686                         if (irq == valid_irq[cfg])
687                                 return cfg;
688         }
689 
690         return INVALID_IRQ;
691 }
692 
693 /*
694  * Perform certain arcane port-checks to see whether there
695  * is a SoundScape board lurking behind the given ports.
696  */
697 static int detect_sscape(struct soundscape *s, long wss_io)
698 {
699         unsigned long flags;
700         unsigned d;
701         int retval = 0;
702 
703         spin_lock_irqsave(&s->lock, flags);
704 
705         /*
706          * The following code is lifted from the original OSS driver,
707          * and as I don't have a datasheet I cannot really comment
708          * on what it is doing...
709          */
710         if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
711                 goto _done;
712 
713         d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
714         if ((d & 0x80) != 0)
715                 goto _done;
716 
717         if (d == 0)
718                 s->ic_type = IC_ODIE;
719         else if ((d & 0x60) != 0)
720                 s->ic_type = IC_OPUS;
721         else
722                 goto _done;
723 
724         outb(0xfa, ODIE_ADDR_IO(s->io_base));
725         if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
726                 goto _done;
727 
728         outb(0xfe, ODIE_ADDR_IO(s->io_base));
729         if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
730                 goto _done;
731 
732         outb(0xfe, ODIE_ADDR_IO(s->io_base));
733         d = inb(ODIE_DATA_IO(s->io_base));
734         if (s->type != SSCAPE_VIVO && (d & 0x9f) != 0x0e)
735                 goto _done;
736 
737         if (s->ic_type == IC_OPUS)
738                 activate_ad1845_unsafe(s->io_base);
739 
740         if (s->type == SSCAPE_VIVO)
741                 wss_io += 4;
742 
743         d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
744         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
745 
746         /* wait for WSS codec */
747         for (d = 0; d < 500; d++) {
748                 if ((inb(wss_io) & 0x80) == 0)
749                         break;
750                 spin_unlock_irqrestore(&s->lock, flags);
751                 msleep(1);
752                 spin_lock_irqsave(&s->lock, flags);
753         }
754 
755         if ((inb(wss_io) & 0x80) != 0)
756                 goto _done;
757 
758         if (inb(wss_io + 2) == 0xff)
759                 goto _done;
760 
761         d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f;
762         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d);
763 
764         if ((inb(wss_io) & 0x80) != 0)
765                 s->type = MEDIA_FX;
766 
767         d = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
768         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
769         /* wait for WSS codec */
770         for (d = 0; d < 500; d++) {
771                 if ((inb(wss_io) & 0x80) == 0)
772                         break;
773                 spin_unlock_irqrestore(&s->lock, flags);
774                 msleep(1);
775                 spin_lock_irqsave(&s->lock, flags);
776         }
777 
778         /*
779          * SoundScape successfully detected!
780          */
781         retval = 1;
782 
783 _done:
784         spin_unlock_irqrestore(&s->lock, flags);
785         return retval;
786 }
787 
788 /*
789  * ALSA callback function, called when attempting to open the MIDI device.
790  * Check that the MIDI firmware has been loaded, because we don't want
791  * to crash the machine. Also check that someone isn't using the hardware
792  * IOCTL device.
793  */
794 static int mpu401_open(struct snd_mpu401 *mpu)
795 {
796         if (!verify_mpu401(mpu)) {
797                 snd_printk(KERN_ERR "sscape: MIDI disabled, "
798                                     "please load firmware\n");
799                 return -ENODEV;
800         }
801 
802         return 0;
803 }
804 
805 /*
806  * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
807  */
808 static int create_mpu401(struct snd_card *card, int devnum,
809                          unsigned long port, int irq)
810 {
811         struct soundscape *sscape = get_card_soundscape(card);
812         struct snd_rawmidi *rawmidi;
813         int err;
814 
815         err = snd_mpu401_uart_new(card, devnum, MPU401_HW_MPU401, port,
816                                   MPU401_INFO_INTEGRATED, irq, &rawmidi);
817         if (err == 0) {
818                 struct snd_mpu401 *mpu = rawmidi->private_data;
819                 mpu->open_input = mpu401_open;
820                 mpu->open_output = mpu401_open;
821                 mpu->private_data = sscape;
822 
823                 initialise_mpu401(mpu);
824         }
825 
826         return err;
827 }
828 
829 
830 /*
831  * Create an AD1845 PCM subdevice on the SoundScape. The AD1845
832  * is very much like a CS4231, with a few extra bits. We will
833  * try to support at least some of the extra bits by overriding
834  * some of the CS4231 callback.
835  */
836 static int create_ad1845(struct snd_card *card, unsigned port,
837                          int irq, int dma1, int dma2)
838 {
839         register struct soundscape *sscape = get_card_soundscape(card);
840         struct snd_wss *chip;
841         int err;
842         int codec_type = WSS_HW_DETECT;
843 
844         switch (sscape->type) {
845         case MEDIA_FX:
846         case SSCAPE:
847                 /*
848                  * There are some freak examples of early Soundscape cards
849                  * with CS4231 instead of AD1848/CS4248. Unfortunately, the
850                  * CS4231 works only in CS4248 compatibility mode on
851                  * these cards so force it.
852                  */
853                 if (sscape->ic_type != IC_OPUS)
854                         codec_type = WSS_HW_AD1848;
855                 break;
856 
857         case SSCAPE_VIVO:
858                 port += 4;
859                 break;
860         default:
861                 break;
862         }
863 
864         err = snd_wss_create(card, port, -1, irq, dma1, dma2,
865                              codec_type, WSS_HWSHARE_DMA1, &chip);
866         if (!err) {
867                 unsigned long flags;
868 
869                 if (sscape->type != SSCAPE_VIVO) {
870                         /*
871                          * The input clock frequency on the SoundScape must
872                          * be 14.31818 MHz, because we must set this register
873                          * to get the playback to sound correct ...
874                          */
875                         snd_wss_mce_up(chip);
876                         spin_lock_irqsave(&chip->reg_lock, flags);
877                         snd_wss_out(chip, AD1845_CLOCK, 0x20);
878                         spin_unlock_irqrestore(&chip->reg_lock, flags);
879                         snd_wss_mce_down(chip);
880 
881                 }
882 
883                 err = snd_wss_pcm(chip, 0);
884                 if (err < 0) {
885                         snd_printk(KERN_ERR "sscape: No PCM device "
886                                             "for AD1845 chip\n");
887                         goto _error;
888                 }
889 
890                 err = snd_wss_mixer(chip);
891                 if (err < 0) {
892                         snd_printk(KERN_ERR "sscape: No mixer device "
893                                             "for AD1845 chip\n");
894                         goto _error;
895                 }
896                 if (chip->hardware != WSS_HW_AD1848) {
897                         err = snd_wss_timer(chip, 0);
898                         if (err < 0) {
899                                 snd_printk(KERN_ERR "sscape: No timer device "
900                                                     "for AD1845 chip\n");
901                                 goto _error;
902                         }
903                 }
904 
905                 if (sscape->type != SSCAPE_VIVO) {
906                         err = snd_ctl_add(card,
907                                           snd_ctl_new1(&midi_mixer_ctl, chip));
908                         if (err < 0) {
909                                 snd_printk(KERN_ERR "sscape: Could not create "
910                                                     "MIDI mixer control\n");
911                                 goto _error;
912                         }
913                 }
914 
915                 sscape->chip = chip;
916         }
917 
918 _error:
919         return err;
920 }
921 
922 
923 /*
924  * Create an ALSA soundcard entry for the SoundScape, using
925  * the given list of port, IRQ and DMA resources.
926  */
927 static int create_sscape(int dev, struct snd_card *card)
928 {
929         struct soundscape *sscape = get_card_soundscape(card);
930         unsigned dma_cfg;
931         unsigned irq_cfg;
932         unsigned mpu_irq_cfg;
933         struct resource *io_res;
934         struct resource *wss_res;
935         unsigned long flags;
936         int err;
937         int val;
938         const char *name;
939 
940         /*
941          * Grab IO ports that we will need to probe so that we
942          * can detect and control this hardware ...
943          */
944         io_res = request_region(port[dev], 8, "SoundScape");
945         if (!io_res) {
946                 snd_printk(KERN_ERR
947                            "sscape: can't grab port 0x%lx\n", port[dev]);
948                 return -EBUSY;
949         }
950         wss_res = NULL;
951         if (sscape->type == SSCAPE_VIVO) {
952                 wss_res = request_region(wss_port[dev], 4, "SoundScape");
953                 if (!wss_res) {
954                         snd_printk(KERN_ERR "sscape: can't grab port 0x%lx\n",
955                                             wss_port[dev]);
956                         err = -EBUSY;
957                         goto _release_region;
958                 }
959         }
960 
961         /*
962          * Grab one DMA channel ...
963          */
964         err = request_dma(dma[dev], "SoundScape");
965         if (err < 0) {
966                 snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]);
967                 goto _release_region;
968         }
969 
970         spin_lock_init(&sscape->lock);
971         sscape->io_res = io_res;
972         sscape->wss_res = wss_res;
973         sscape->io_base = port[dev];
974 
975         if (!detect_sscape(sscape, wss_port[dev])) {
976                 printk(KERN_ERR "sscape: hardware not detected at 0x%x\n",
977                         sscape->io_base);
978                 err = -ENODEV;
979                 goto _release_dma;
980         }
981 
982         switch (sscape->type) {
983         case MEDIA_FX:
984                 name = "MediaFX/SoundFX";
985                 break;
986         case SSCAPE:
987                 name = "Soundscape";
988                 break;
989         case SSCAPE_PNP:
990                 name = "Soundscape PnP";
991                 break;
992         case SSCAPE_VIVO:
993                 name = "Soundscape VIVO";
994                 break;
995         default:
996                 name = "unknown Soundscape";
997                 break;
998         }
999 
1000         printk(KERN_INFO "sscape: %s card detected at 0x%x, using IRQ %d, DMA %d\n",
1001                          name, sscape->io_base, irq[dev], dma[dev]);
1002 
1003         /*
1004          * Check that the user didn't pass us garbage data ...
1005          */
1006         irq_cfg = get_irq_config(sscape->type, irq[dev]);
1007         if (irq_cfg == INVALID_IRQ) {
1008                 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]);
1009                 err = -ENXIO;
1010                 goto _release_dma;
1011         }
1012 
1013         mpu_irq_cfg = get_irq_config(sscape->type, mpu_irq[dev]);
1014         if (mpu_irq_cfg == INVALID_IRQ) {
1015                 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
1016                 err = -ENXIO;
1017                 goto _release_dma;
1018         }
1019 
1020         /*
1021          * Tell the on-board devices where their resources are (I think -
1022          * I can't be sure without a datasheet ... So many magic values!)
1023          */
1024         spin_lock_irqsave(&sscape->lock, flags);
1025 
1026         sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
1027         sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
1028 
1029         /*
1030          * Enable and configure the DMA channels ...
1031          */
1032         sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
1033         dma_cfg = (sscape->ic_type == IC_OPUS ? 0x40 : 0x70);
1034         sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
1035         sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
1036 
1037         mpu_irq_cfg |= mpu_irq_cfg << 2;
1038         val = sscape_read_unsafe(sscape->io_base, GA_HMCTL_REG) & 0xF7;
1039         if (joystick[dev])
1040                 val |= 8;
1041         sscape_write_unsafe(sscape->io_base, GA_HMCTL_REG, val | 0x10);
1042         sscape_write_unsafe(sscape->io_base, GA_INTCFG_REG, 0xf0 | mpu_irq_cfg);
1043         sscape_write_unsafe(sscape->io_base,
1044                             GA_CDCFG_REG, 0x09 | DMA_8BIT
1045                             | (dma[dev] << 4) | (irq_cfg << 1));
1046         /*
1047          * Enable the master IRQ ...
1048          */
1049         sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x80);
1050 
1051         spin_unlock_irqrestore(&sscape->lock, flags);
1052 
1053         /*
1054          * We have now enabled the codec chip, and so we should
1055          * detect the AD1845 device ...
1056          */
1057         err = create_ad1845(card, wss_port[dev], irq[dev],
1058                             dma[dev], dma2[dev]);
1059         if (err < 0) {
1060                 snd_printk(KERN_ERR
1061                                 "sscape: No AD1845 device at 0x%lx, IRQ %d\n",
1062                                 wss_port[dev], irq[dev]);
1063                 goto _release_dma;
1064         }
1065         strcpy(card->driver, "SoundScape");
1066         strcpy(card->shortname, name);
1067         snprintf(card->longname, sizeof(card->longname),
1068                  "%s at 0x%lx, IRQ %d, DMA1 %d, DMA2 %d\n",
1069                  name, sscape->chip->port, sscape->chip->irq,
1070                  sscape->chip->dma1, sscape->chip->dma2);
1071 
1072 #define MIDI_DEVNUM  0
1073         if (sscape->type != SSCAPE_VIVO) {
1074                 err = sscape_upload_bootblock(card);
1075                 if (err >= 0)
1076                         err = sscape_upload_microcode(card, err);
1077 
1078                 if (err == 0) {
1079                         err = create_mpu401(card, MIDI_DEVNUM, port[dev],
1080                                             mpu_irq[dev]);
1081                         if (err < 0) {
1082                                 snd_printk(KERN_ERR "sscape: Failed to create "
1083                                                 "MPU-401 device at 0x%lx\n",
1084                                                 port[dev]);
1085                                 goto _release_dma;
1086                         }
1087 
1088                         /*
1089                          * Initialize mixer
1090                          */
1091                         spin_lock_irqsave(&sscape->lock, flags);
1092                         sscape->midi_vol = 0;
1093                         host_write_ctrl_unsafe(sscape->io_base,
1094                                                 CMD_SET_MIDI_VOL, 100);
1095                         host_write_ctrl_unsafe(sscape->io_base,
1096                                                 sscape->midi_vol, 100);
1097                         host_write_ctrl_unsafe(sscape->io_base,
1098                                                 CMD_XXX_MIDI_VOL, 100);
1099                         host_write_ctrl_unsafe(sscape->io_base,
1100                                                 sscape->midi_vol, 100);
1101                         host_write_ctrl_unsafe(sscape->io_base,
1102                                                 CMD_SET_EXTMIDI, 100);
1103                         host_write_ctrl_unsafe(sscape->io_base,
1104                                                 0, 100);
1105                         host_write_ctrl_unsafe(sscape->io_base, CMD_ACK, 100);
1106 
1107                         set_midi_mode_unsafe(sscape->io_base);
1108                         spin_unlock_irqrestore(&sscape->lock, flags);
1109                 }
1110         }
1111 
1112         /*
1113          * Now that we have successfully created this sound card,
1114          * it is safe to store the pointer.
1115          * NOTE: we only register the sound card's "destructor"
1116          *       function now that our "constructor" has completed.
1117          */
1118         card->private_free = soundscape_free;
1119 
1120         return 0;
1121 
1122 _release_dma:
1123         free_dma(dma[dev]);
1124 
1125 _release_region:
1126         release_and_free_resource(wss_res);
1127         release_and_free_resource(io_res);
1128 
1129         return err;
1130 }
1131 
1132 
1133 static int snd_sscape_match(struct device *pdev, unsigned int i)
1134 {
1135         /*
1136          * Make sure we were given ALL of the other parameters.
1137          */
1138         if (port[i] == SNDRV_AUTO_PORT)
1139                 return 0;
1140 
1141         if (irq[i] == SNDRV_AUTO_IRQ ||
1142             mpu_irq[i] == SNDRV_AUTO_IRQ ||
1143             dma[i] == SNDRV_AUTO_DMA) {
1144                 printk(KERN_INFO
1145                        "sscape: insufficient parameters, "
1146                        "need IO, IRQ, MPU-IRQ and DMA\n");
1147                 return 0;
1148         }
1149 
1150         return 1;
1151 }
1152 
1153 static int snd_sscape_probe(struct device *pdev, unsigned int dev)
1154 {
1155         struct snd_card *card;
1156         struct soundscape *sscape;
1157         int ret;
1158 
1159         ret = snd_card_new(pdev, index[dev], id[dev], THIS_MODULE,
1160                            sizeof(struct soundscape), &card);
1161         if (ret < 0)
1162                 return ret;
1163 
1164         sscape = get_card_soundscape(card);
1165         sscape->type = SSCAPE;
1166 
1167         dma[dev] &= 0x03;
1168 
1169         ret = create_sscape(dev, card);
1170         if (ret < 0)
1171                 goto _release_card;
1172 
1173         ret = snd_card_register(card);
1174         if (ret < 0) {
1175                 snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1176                 goto _release_card;
1177         }
1178         dev_set_drvdata(pdev, card);
1179         return 0;
1180 
1181 _release_card:
1182         snd_card_free(card);
1183         return ret;
1184 }
1185 
1186 static int snd_sscape_remove(struct device *devptr, unsigned int dev)
1187 {
1188         snd_card_free(dev_get_drvdata(devptr));
1189         return 0;
1190 }
1191 
1192 #define DEV_NAME "sscape"
1193 
1194 static struct isa_driver snd_sscape_driver = {
1195         .match          = snd_sscape_match,
1196         .probe          = snd_sscape_probe,
1197         .remove         = snd_sscape_remove,
1198         /* FIXME: suspend/resume */
1199         .driver         = {
1200                 .name   = DEV_NAME
1201         },
1202 };
1203 
1204 #ifdef CONFIG_PNP
1205 static inline int get_next_autoindex(int i)
1206 {
1207         while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT)
1208                 ++i;
1209         return i;
1210 }
1211 
1212 
1213 static int sscape_pnp_detect(struct pnp_card_link *pcard,
1214                              const struct pnp_card_device_id *pid)
1215 {
1216         static int idx = 0;
1217         struct pnp_dev *dev;
1218         struct snd_card *card;
1219         struct soundscape *sscape;
1220         int ret;
1221 
1222         /*
1223          * Allow this function to fail *quietly* if all the ISA PnP
1224          * devices were configured using module parameters instead.
1225          */
1226         idx = get_next_autoindex(idx);
1227         if (idx >= SNDRV_CARDS)
1228                 return -ENOSPC;
1229 
1230         /*
1231          * Check that we still have room for another sound card ...
1232          */
1233         dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
1234         if (!dev)
1235                 return -ENODEV;
1236 
1237         if (!pnp_is_active(dev)) {
1238                 if (pnp_activate_dev(dev) < 0) {
1239                         snd_printk(KERN_INFO "sscape: device is inactive\n");
1240                         return -EBUSY;
1241                 }
1242         }
1243 
1244         /*
1245          * Create a new ALSA sound card entry, in anticipation
1246          * of detecting our hardware ...
1247          */
1248         ret = snd_card_new(&pcard->card->dev,
1249                            index[idx], id[idx], THIS_MODULE,
1250                            sizeof(struct soundscape), &card);
1251         if (ret < 0)
1252                 return ret;
1253 
1254         sscape = get_card_soundscape(card);
1255 
1256         /*
1257          * Identify card model ...
1258          */
1259         if (!strncmp("ENS4081", pid->id, 7))
1260                 sscape->type = SSCAPE_VIVO;
1261         else
1262                 sscape->type = SSCAPE_PNP;
1263 
1264         /*
1265          * Read the correct parameters off the ISA PnP bus ...
1266          */
1267         port[idx] = pnp_port_start(dev, 0);
1268         irq[idx] = pnp_irq(dev, 0);
1269         mpu_irq[idx] = pnp_irq(dev, 1);
1270         dma[idx] = pnp_dma(dev, 0) & 0x03;
1271         if (sscape->type == SSCAPE_PNP) {
1272                 dma2[idx] = dma[idx];
1273                 wss_port[idx] = CODEC_IO(port[idx]);
1274         } else {
1275                 wss_port[idx] = pnp_port_start(dev, 1);
1276                 dma2[idx] = pnp_dma(dev, 1);
1277         }
1278 
1279         ret = create_sscape(idx, card);
1280         if (ret < 0)
1281                 goto _release_card;
1282 
1283         ret = snd_card_register(card);
1284         if (ret < 0) {
1285                 snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1286                 goto _release_card;
1287         }
1288 
1289         pnp_set_card_drvdata(pcard, card);
1290         ++idx;
1291         return 0;
1292 
1293 _release_card:
1294         snd_card_free(card);
1295         return ret;
1296 }
1297 
1298 static void sscape_pnp_remove(struct pnp_card_link *pcard)
1299 {
1300         snd_card_free(pnp_get_card_drvdata(pcard));
1301         pnp_set_card_drvdata(pcard, NULL);
1302 }
1303 
1304 static struct pnp_card_driver sscape_pnpc_driver = {
1305         .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1306         .name = "sscape",
1307         .id_table = sscape_pnpids,
1308         .probe = sscape_pnp_detect,
1309         .remove = sscape_pnp_remove,
1310 };
1311 
1312 #endif /* CONFIG_PNP */
1313 
1314 static int __init sscape_init(void)
1315 {
1316         int err;
1317 
1318         err = isa_register_driver(&snd_sscape_driver, SNDRV_CARDS);
1319 #ifdef CONFIG_PNP
1320         if (!err)
1321                 isa_registered = 1;
1322 
1323         err = pnp_register_card_driver(&sscape_pnpc_driver);
1324         if (!err)
1325                 pnp_registered = 1;
1326 
1327         if (isa_registered)
1328                 err = 0;
1329 #endif
1330         return err;
1331 }
1332 
1333 static void __exit sscape_exit(void)
1334 {
1335 #ifdef CONFIG_PNP
1336         if (pnp_registered)
1337                 pnp_unregister_card_driver(&sscape_pnpc_driver);
1338         if (isa_registered)
1339 #endif
1340                 isa_unregister_driver(&snd_sscape_driver);
1341 }
1342 
1343 module_init(sscape_init);
1344 module_exit(sscape_exit);
1345 

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