?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] fix semaphore handling in __unregister_chrdev_region
[linux/fpc-iii.git] / sound / oss / via82cxxx_audio.c
blobb387e1e524859ce38a8c1dddf2a247d3a6381ed0
1 /*
2 * Support for VIA 82Cxxx Audio Codecs
3 * Copyright 1999,2000 Jeff Garzik
4 *
5 * Updated to support the VIA 8233/8235 audio subsystem
6 * Alan Cox <alan@redhat.com> (C) Copyright 2002, 2003 Red Hat Inc
7 *
8 * Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
9 * See the "COPYING" file distributed with this software for more info.
10 * NO WARRANTY
11 *
12 * For a list of known bugs (errata) and documentation,
13 * see via-audio.pdf in Documentation/DocBook.
14 * If this documentation does not exist, run "make pdfdocs".
15 */
16
17
18 #define VIA_VERSION "1.9.1-ac4-2.5"
19
20
21 #include <linux/config.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/fs.h>
25 #include <linux/mm.h>
26 #include <linux/pci.h>
27 #include <linux/init.h>
28 #include <linux/interrupt.h>
29 #include <linux/proc_fs.h>
30 #include <linux/spinlock.h>
31 #include <linux/sound.h>
32 #include <linux/poll.h>
33 #include <linux/soundcard.h>
34 #include <linux/ac97_codec.h>
35 #include <linux/smp_lock.h>
36 #include <linux/ioport.h>
37 #include <linux/delay.h>
38 #include <asm/io.h>
39 #include <asm/uaccess.h>
40 #include <asm/semaphore.h>
41 #include "sound_config.h"
42 #include "dev_table.h"
43 #include "mpu401.h"
44
45
46 #undef VIA_DEBUG /* define to enable debugging output and checks */
47 #ifdef VIA_DEBUG
48 /* note: prints function name for you */
49 #define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
50 #else
51 #define DPRINTK(fmt, args...)
52 #endif
53
54 #undef VIA_NDEBUG /* define to disable lightweight runtime checks */
55 #ifdef VIA_NDEBUG
56 #define assert(expr)
57 #else
58 #define assert(expr) \
59 if(!(expr)) { \
60 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
61 #expr,__FILE__,__FUNCTION__,__LINE__); \
62 }
63 #endif
64
65 #define VIA_SUPPORT_MMAP 1 /* buggy, for now... */
66
67 #define MAX_CARDS 1
68
69 #define VIA_CARD_NAME "VIA 82Cxxx Audio driver " VIA_VERSION
70 #define VIA_MODULE_NAME "via82cxxx"
71 #define PFX VIA_MODULE_NAME ": "
72
73 #define VIA_COUNTER_LIMIT 100000
74
75 /* size of DMA buffers */
76 #define VIA_MAX_BUFFER_DMA_PAGES 32
77
78 /* buffering default values in ms */
79 #define VIA_DEFAULT_FRAG_TIME 20
80 #define VIA_DEFAULT_BUFFER_TIME 500
81
82 /* the hardware has a 256 fragment limit */
83 #define VIA_MIN_FRAG_NUMBER 2
84 #define VIA_MAX_FRAG_NUMBER 128
85
86 #define VIA_MAX_FRAG_SIZE PAGE_SIZE
87 #define VIA_MIN_FRAG_SIZE (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE / VIA_MAX_FRAG_NUMBER)
88
89
90 /* 82C686 function 5 (audio codec) PCI configuration registers */
91 #define VIA_ACLINK_STATUS 0x40
92 #define VIA_ACLINK_CTRL 0x41
93 #define VIA_FUNC_ENABLE 0x42
94 #define VIA_PNP_CONTROL 0x43
95 #define VIA_FM_NMI_CTRL 0x48
96
97 /*
98 * controller base 0 (scatter-gather) registers
99 *
100 * NOTE: Via datasheet lists first channel as "read"
101 * channel and second channel as "write" channel.
102 * I changed the naming of the constants to be more
103 * clear than I felt the datasheet to be.
104 */
105
106 #define VIA_BASE0_PCM_OUT_CHAN 0x00 /* output PCM to user */
107 #define VIA_BASE0_PCM_OUT_CHAN_STATUS 0x00
108 #define VIA_BASE0_PCM_OUT_CHAN_CTRL 0x01
109 #define VIA_BASE0_PCM_OUT_CHAN_TYPE 0x02
110
111 #define VIA_BASE0_PCM_IN_CHAN 0x10 /* input PCM from user */
112 #define VIA_BASE0_PCM_IN_CHAN_STATUS 0x10
113 #define VIA_BASE0_PCM_IN_CHAN_CTRL 0x11
114 #define VIA_BASE0_PCM_IN_CHAN_TYPE 0x12
115
116 /* offsets from base */
117 #define VIA_PCM_STATUS 0x00
118 #define VIA_PCM_CONTROL 0x01
119 #define VIA_PCM_TYPE 0x02
120 #define VIA_PCM_LEFTVOL 0x02
121 #define VIA_PCM_RIGHTVOL 0x03
122 #define VIA_PCM_TABLE_ADDR 0x04
123 #define VIA_PCM_STOPRATE 0x08 /* 8233+ */
124 #define VIA_PCM_BLOCK_COUNT 0x0C
125
126 /* XXX unused DMA channel for FM PCM data */
127 #define VIA_BASE0_FM_OUT_CHAN 0x20
128 #define VIA_BASE0_FM_OUT_CHAN_STATUS 0x20
129 #define VIA_BASE0_FM_OUT_CHAN_CTRL 0x21
130 #define VIA_BASE0_FM_OUT_CHAN_TYPE 0x22
131
132 /* Six channel audio output on 8233 */
133 #define VIA_BASE0_MULTI_OUT_CHAN 0x40
134 #define VIA_BASE0_MULTI_OUT_CHAN_STATUS 0x40
135 #define VIA_BASE0_MULTI_OUT_CHAN_CTRL 0x41
136 #define VIA_BASE0_MULTI_OUT_CHAN_TYPE 0x42
137
138 #define VIA_BASE0_AC97_CTRL 0x80
139 #define VIA_BASE0_SGD_STATUS_SHADOW 0x84
140 #define VIA_BASE0_GPI_INT_ENABLE 0x8C
141 #define VIA_INTR_OUT ((1<<0) | (1<<4) | (1<<8))
142 #define VIA_INTR_IN ((1<<1) | (1<<5) | (1<<9))
143 #define VIA_INTR_FM ((1<<2) | (1<<6) | (1<<10))
144 #define VIA_INTR_MASK (VIA_INTR_OUT | VIA_INTR_IN | VIA_INTR_FM)
145
146 /* Newer VIA we need to monitor the low 3 bits of each channel. This
147 mask covers the channels we don't yet use as well
148 */
149
150 #define VIA_NEW_INTR_MASK 0x77077777UL
151
152 /* VIA_BASE0_AUDIO_xxx_CHAN_TYPE bits */
153 #define VIA_IRQ_ON_FLAG (1<<0) /* int on each flagged scatter block */
154 #define VIA_IRQ_ON_EOL (1<<1) /* int at end of scatter list */
155 #define VIA_INT_SEL_PCI_LAST_LINE_READ (0) /* int at PCI read of last line */
156 #define VIA_INT_SEL_LAST_SAMPLE_SENT (1<<2) /* int at last sample sent */
157 #define VIA_INT_SEL_ONE_LINE_LEFT (1<<3) /* int at less than one line to send */
158 #define VIA_PCM_FMT_STEREO (1<<4) /* PCM stereo format (bit clear == mono) */
159 #define VIA_PCM_FMT_16BIT (1<<5) /* PCM 16-bit format (bit clear == 8-bit) */
160 #define VIA_PCM_REC_FIFO (1<<6) /* PCM Recording FIFO */
161 #define VIA_RESTART_SGD_ON_EOL (1<<7) /* restart scatter-gather at EOL */
162 #define VIA_PCM_FMT_MASK (VIA_PCM_FMT_STEREO|VIA_PCM_FMT_16BIT)
163 #define VIA_CHAN_TYPE_MASK (VIA_RESTART_SGD_ON_EOL | \
164 VIA_IRQ_ON_FLAG | \
165 VIA_IRQ_ON_EOL)
166 #define VIA_CHAN_TYPE_INT_SELECT (VIA_INT_SEL_LAST_SAMPLE_SENT)
167
168 /* PCI configuration register bits and masks */
169 #define VIA_CR40_AC97_READY 0x01
170 #define VIA_CR40_AC97_LOW_POWER 0x02
171 #define VIA_CR40_SECONDARY_READY 0x04
172
173 #define VIA_CR41_AC97_ENABLE 0x80 /* enable AC97 codec */
174 #define VIA_CR41_AC97_RESET 0x40 /* clear bit to reset AC97 */
175 #define VIA_CR41_AC97_WAKEUP 0x20 /* wake up from power-down mode */
176 #define VIA_CR41_AC97_SDO 0x10 /* force Serial Data Out (SDO) high */
177 #define VIA_CR41_VRA 0x08 /* enable variable sample rate */
178 #define VIA_CR41_PCM_ENABLE 0x04 /* AC Link SGD Read Channel PCM Data Output */
179 #define VIA_CR41_FM_PCM_ENABLE 0x02 /* AC Link FM Channel PCM Data Out */
180 #define VIA_CR41_SB_PCM_ENABLE 0x01 /* AC Link SB PCM Data Output */
181 #define VIA_CR41_BOOT_MASK (VIA_CR41_AC97_ENABLE | \
182 VIA_CR41_AC97_WAKEUP | \
183 VIA_CR41_AC97_SDO)
184 #define VIA_CR41_RUN_MASK (VIA_CR41_AC97_ENABLE | \
185 VIA_CR41_AC97_RESET | \
186 VIA_CR41_VRA | \
187 VIA_CR41_PCM_ENABLE)
188
189 #define VIA_CR42_SB_ENABLE 0x01
190 #define VIA_CR42_MIDI_ENABLE 0x02
191 #define VIA_CR42_FM_ENABLE 0x04
192 #define VIA_CR42_GAME_ENABLE 0x08
193 #define VIA_CR42_MIDI_IRQMASK 0x40
194 #define VIA_CR42_MIDI_PNP 0x80
195
196 #define VIA_CR44_SECOND_CODEC_SUPPORT (1 << 6)
197 #define VIA_CR44_AC_LINK_ACCESS (1 << 7)
198
199 #define VIA_CR48_FM_TRAP_TO_NMI (1 << 2)
200
201 /* controller base 0 register bitmasks */
202 #define VIA_INT_DISABLE_MASK (~(0x01|0x02))
203 #define VIA_SGD_STOPPED (1 << 2)
204 #define VIA_SGD_PAUSED (1 << 6)
205 #define VIA_SGD_ACTIVE (1 << 7)
206 #define VIA_SGD_TERMINATE (1 << 6)
207 #define VIA_SGD_FLAG (1 << 0)
208 #define VIA_SGD_EOL (1 << 1)
209 #define VIA_SGD_START (1 << 7)
210
211 #define VIA_CR80_FIRST_CODEC 0
212 #define VIA_CR80_SECOND_CODEC (1 << 30)
213 #define VIA_CR80_FIRST_CODEC_VALID (1 << 25)
214 #define VIA_CR80_VALID (1 << 25)
215 #define VIA_CR80_SECOND_CODEC_VALID (1 << 27)
216 #define VIA_CR80_BUSY (1 << 24)
217 #define VIA_CR83_BUSY (1)
218 #define VIA_CR83_FIRST_CODEC_VALID (1 << 1)
219 #define VIA_CR80_READ (1 << 23)
220 #define VIA_CR80_WRITE_MODE 0
221 #define VIA_CR80_REG_IDX(idx) ((((idx) & 0xFF) >> 1) << 16)
222
223 /* capabilities we announce */
224 #ifdef VIA_SUPPORT_MMAP
225 #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | DSP_CAP_MMAP | \
226 DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
227 #else
228 #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | \
229 DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
230 #endif
231
232 /* scatter-gather DMA table entry, exactly as passed to hardware */
233 struct via_sgd_table {
234 u32 addr;
235 u32 count; /* includes additional VIA_xxx bits also */
236 };
237
238 #define VIA_EOL (1 << 31)
239 #define VIA_FLAG (1 << 30)
240 #define VIA_STOP (1 << 29)
241
242
243 enum via_channel_states {
244 sgd_stopped = 0,
245 sgd_in_progress = 1,
246 };
247
248
249 struct via_buffer_pgtbl {
250 dma_addr_t handle;
251 void *cpuaddr;
252 };
253
254
255 struct via_channel {
256 atomic_t n_frags;
257 atomic_t hw_ptr;
258 wait_queue_head_t wait;
259
260 unsigned int sw_ptr;
261 unsigned int slop_len;
262 unsigned int n_irqs;
263 int bytes;
264
265 unsigned is_active : 1;
266 unsigned is_record : 1;
267 unsigned is_mapped : 1;
268 unsigned is_enabled : 1;
269 unsigned is_multi: 1; /* 8233 6 channel */
270 u8 pcm_fmt; /* VIA_PCM_FMT_xxx */
271 u8 channels; /* Channel count */
272
273 unsigned rate; /* sample rate */
274 unsigned int frag_size;
275 unsigned int frag_number;
276
277 unsigned char intmask;
278
279 volatile struct via_sgd_table *sgtable;
280 dma_addr_t sgt_handle;
281
282 unsigned int page_number;
283 struct via_buffer_pgtbl pgtbl[VIA_MAX_BUFFER_DMA_PAGES];
284
285 long iobase;
286
287 const char *name;
288 };
289
290
291 /* data stored for each chip */
292 struct via_info {
293 struct pci_dev *pdev;
294 long baseaddr;
295
296 struct ac97_codec *ac97;
297 spinlock_t ac97_lock;
298 spinlock_t lock;
299 int card_num; /* unique card number, from 0 */
300
301 int dev_dsp; /* /dev/dsp index from register_sound_dsp() */
302
303 unsigned rev_h : 1;
304 unsigned legacy: 1; /* Has legacy ports */
305 unsigned intmask: 1; /* Needs int bits */
306 unsigned sixchannel: 1; /* 8233/35 with 6 channel support */
307 unsigned volume: 1;
308
309 int locked_rate : 1;
310
311 int mixer_vol; /* 8233/35 volume - not yet implemented */
312
313 struct semaphore syscall_sem;
314 struct semaphore open_sem;
315
316 /* The 8233/8235 have 4 DX audio channels, two record and
317 one six channel out. We bind ch_in to DX 1, ch_out to multichannel
318 and ch_fm to DX 2. DX 3 and REC0/REC1 are unused at the
319 moment */
320
321 struct via_channel ch_in;
322 struct via_channel ch_out;
323 struct via_channel ch_fm;
324
325 #ifdef CONFIG_MIDI_VIA82CXXX
326 void *midi_devc;
327 struct address_info midi_info;
328 #endif
329 };
330
331
332 /* number of cards, used for assigning unique numbers to cards */
333 static unsigned via_num_cards;
334
335
336
337 /****************************************************************
338 *
339 * prototypes
340 *
341 *
342 */
343
344 static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id);
345 static void __devexit via_remove_one (struct pci_dev *pdev);
346
347 static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos);
348 static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos);
349 static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait);
350 static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
351 static int via_dsp_open (struct inode *inode, struct file *file);
352 static int via_dsp_release(struct inode *inode, struct file *file);
353 static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma);
354
355 static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg);
356 static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value);
357 static u8 via_ac97_wait_idle (struct via_info *card);
358
359 static void via_chan_free (struct via_info *card, struct via_channel *chan);
360 static void via_chan_clear (struct via_info *card, struct via_channel *chan);
361 static void via_chan_pcm_fmt (struct via_channel *chan, int reset);
362 static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan);
363
364
365 /****************************************************************
366 *
367 * Various data the driver needs
368 *
369 *
370 */
371
372
373 static struct pci_device_id via_pci_tbl[] = {
374 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
375 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
376 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_5,
377 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
378 { 0, }
379 };
380 MODULE_DEVICE_TABLE(pci,via_pci_tbl);
381
382
383 static struct pci_driver via_driver = {
384 .name = VIA_MODULE_NAME,
385 .id_table = via_pci_tbl,
386 .probe = via_init_one,
387 .remove = __devexit_p(via_remove_one),
388 };
389
390
391 /****************************************************************
392 *
393 * Low-level base 0 register read/write helpers
394 *
395 *
396 */
397
398 /**
399 * via_chan_stop - Terminate DMA on specified PCM channel
400 * @iobase: PCI base address for SGD channel registers
401 *
402 * Terminate scatter-gather DMA operation for given
403 * channel (derived from @iobase), if DMA is active.
404 *
405 * Note that @iobase is not the PCI base address,
406 * but the PCI base address plus an offset to
407 * one of three PCM channels supported by the chip.
408 *
409 */
410
411 static inline void via_chan_stop (long iobase)
412 {
413 if (inb (iobase + VIA_PCM_STATUS) & VIA_SGD_ACTIVE)
414 outb (VIA_SGD_TERMINATE, iobase + VIA_PCM_CONTROL);
415 }
416
417
418 /**
419 * via_chan_status_clear - Clear status flags on specified DMA channel
420 * @iobase: PCI base address for SGD channel registers
421 *
422 * Clear any pending status flags for the given
423 * DMA channel (derived from @iobase), if any
424 * flags are asserted.
425 *
426 * Note that @iobase is not the PCI base address,
427 * but the PCI base address plus an offset to
428 * one of three PCM channels supported by the chip.
429 *
430 */
431
432 static inline void via_chan_status_clear (long iobase)
433 {
434 u8 tmp = inb (iobase + VIA_PCM_STATUS);
435
436 if (tmp != 0)
437 outb (tmp, iobase + VIA_PCM_STATUS);
438 }
439
440
441 /**
442 * sg_begin - Begin recording or playback on a PCM channel
443 * @chan: Channel for which DMA operation shall begin
444 *
445 * Start scatter-gather DMA for the given channel.
446 *
447 */
448
449 static inline void sg_begin (struct via_channel *chan)
450 {
451 DPRINTK("Start with intmask %d\n", chan->intmask);
452 DPRINTK("About to start from %d to %d\n",
453 inl(chan->iobase + VIA_PCM_BLOCK_COUNT),
454 inb(chan->iobase + VIA_PCM_STOPRATE + 3));
455 outb (VIA_SGD_START|chan->intmask, chan->iobase + VIA_PCM_CONTROL);
456 DPRINTK("Status is now %02X\n", inb(chan->iobase + VIA_PCM_STATUS));
457 DPRINTK("Control is now %02X\n", inb(chan->iobase + VIA_PCM_CONTROL));
458 }
459
460
461 static int sg_active (long iobase)
462 {
463 u8 tmp = inb (iobase + VIA_PCM_STATUS);
464 if ((tmp & VIA_SGD_STOPPED) || (tmp & VIA_SGD_PAUSED)) {
465 printk(KERN_WARNING "via82cxxx warning: SG stopped or paused\n");
466 return 0;
467 }
468 if (tmp & VIA_SGD_ACTIVE)
469 return 1;
470 return 0;
471 }
472
473 static int via_sg_offset(struct via_channel *chan)
474 {
475 return inl (chan->iobase + VIA_PCM_BLOCK_COUNT) & 0x00FFFFFF;
476 }
477
478 /****************************************************************
479 *
480 * Miscellaneous debris
481 *
482 *
483 */
484
485
486 /**
487 * via_syscall_down - down the card-specific syscell semaphore
488 * @card: Private info for specified board
489 * @nonblock: boolean, non-zero if O_NONBLOCK is set
490 *
491 * Encapsulates standard method of acquiring the syscall sem.
492 *
493 * Returns negative errno on error, or zero for success.
494 */
495
496 static inline int via_syscall_down (struct via_info *card, int nonblock)
497 {
498 /* Thomas Sailer:
499 * EAGAIN is supposed to be used if IO is pending,
500 * not if there is contention on some internal
501 * synchronization primitive which should be
502 * held only for a short time anyway
503 */
504 nonblock = 0;
505
506 if (nonblock) {
507 if (down_trylock (&card->syscall_sem))
508 return -EAGAIN;
509 } else {
510 if (down_interruptible (&card->syscall_sem))
511 return -ERESTARTSYS;
512 }
513
514 return 0;
515 }
516
517
518 /**
519 * via_stop_everything - Stop all audio operations
520 * @card: Private info for specified board
521 *
522 * Stops all DMA operations and interrupts, and clear
523 * any pending status bits resulting from those operations.
524 */
525
526 static void via_stop_everything (struct via_info *card)
527 {
528 u8 tmp, new_tmp;
529
530 DPRINTK ("ENTER\n");
531
532 assert (card != NULL);
533
534 /*
535 * terminate any existing operations on audio read/write channels
536 */
537 via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
538 via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
539 via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
540 if(card->sixchannel)
541 via_chan_stop (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
542
543 /*
544 * clear any existing stops / flags (sanity check mainly)
545 */
546 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
547 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
548 via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
549 if(card->sixchannel)
550 via_chan_status_clear (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
551
552 /*
553 * clear any enabled interrupt bits
554 */
555 tmp = inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
556 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
557 if (tmp != new_tmp)
558 outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
559
560 tmp = inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
561 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
562 if (tmp != new_tmp)
563 outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
564
565 tmp = inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
566 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
567 if (tmp != new_tmp)
568 outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
569
570 if(card->sixchannel)
571 {
572 tmp = inb (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
573 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
574 if (tmp != new_tmp)
575 outb (0, card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
576 }
577
578 udelay(10);
579
580 /*
581 * clear any existing flags
582 */
583 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
584 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
585 via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
586
587 DPRINTK ("EXIT\n");
588 }
589
590
591 /**
592 * via_set_rate - Set PCM rate for given channel
593 * @ac97: Pointer to generic codec info struct
594 * @chan: Private info for specified channel
595 * @rate: Desired PCM sample rate, in Khz
596 *
597 * Sets the PCM sample rate for a channel.
598 *
599 * Values for @rate are clamped to a range of 4000 Khz through 48000 Khz,
600 * due to hardware constraints.
601 */
602
603 static int via_set_rate (struct ac97_codec *ac97,
604 struct via_channel *chan, unsigned rate)
605 {
606 struct via_info *card = ac97->private_data;
607 int rate_reg;
608 u32 dacp;
609 u32 mast_vol, phone_vol, mono_vol, pcm_vol;
610 u32 mute_vol = 0x8000; /* The mute volume? -- Seems to work! */
611
612 DPRINTK ("ENTER, rate = %d\n", rate);
613
614 if (chan->rate == rate)
615 goto out;
616 if (card->locked_rate) {
617 chan->rate = 48000;
618 goto out;
619 }
620
621 if (rate > 48000) rate = 48000;
622 if (rate < 4000) rate = 4000;
623
624 rate_reg = chan->is_record ? AC97_PCM_LR_ADC_RATE :
625 AC97_PCM_FRONT_DAC_RATE;
626
627 /* Save current state */
628 dacp=via_ac97_read_reg(ac97, AC97_POWER_CONTROL);
629 mast_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_STEREO);
630 mono_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_MONO);
631 phone_vol = via_ac97_read_reg(ac97, AC97_HEADPHONE_VOL);
632 pcm_vol = via_ac97_read_reg(ac97, AC97_PCMOUT_VOL);
633 /* Mute - largely reduces popping */
634 via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mute_vol);
635 via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mute_vol);
636 via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, mute_vol);
637 via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, mute_vol);
638 /* Power down the DAC */
639 via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp|0x0200);
640
641 /* Set new rate */
642 via_ac97_write_reg (ac97, rate_reg, rate);
643
644 /* Power DAC back up */
645 via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp);
646 udelay (200); /* reduces popping */
647
648 /* Restore volumes */
649 via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mast_vol);
650 via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mono_vol);
651 via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, phone_vol);
652 via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, pcm_vol);
653
654 /* the hardware might return a value different than what we
655 * passed to it, so read the rate value back from hardware
656 * to see what we came up with
657 */
658 chan->rate = via_ac97_read_reg (ac97, rate_reg);
659
660 if (chan->rate == 0) {
661 card->locked_rate = 1;
662 chan->rate = 48000;
663 printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
664 }
665
666 out:
667 DPRINTK ("EXIT, returning rate %d Hz\n", chan->rate);
668 return chan->rate;
669 }
670
671
672 /****************************************************************
673 *
674 * Channel-specific operations
675 *
676 *
677 */
678
679
680 /**
681 * via_chan_init_defaults - Initialize a struct via_channel
682 * @card: Private audio chip info
683 * @chan: Channel to be initialized
684 *
685 * Zero @chan, and then set all static defaults for the structure.
686 */
687
688 static void via_chan_init_defaults (struct via_info *card, struct via_channel *chan)
689 {
690 memset (chan, 0, sizeof (*chan));
691
692 if(card->intmask)
693 chan->intmask = 0x23; /* Turn on the IRQ bits */
694
695 if (chan == &card->ch_out) {
696 chan->name = "PCM-OUT";
697 if(card->sixchannel)
698 {
699 chan->iobase = card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN;
700 chan->is_multi = 1;
701 DPRINTK("Using multichannel for pcm out\n");
702 }
703 else
704 chan->iobase = card->baseaddr + VIA_BASE0_PCM_OUT_CHAN;
705 } else if (chan == &card->ch_in) {
706 chan->name = "PCM-IN";
707 chan->iobase = card->baseaddr + VIA_BASE0_PCM_IN_CHAN;
708 chan->is_record = 1;
709 } else if (chan == &card->ch_fm) {
710 chan->name = "PCM-OUT-FM";
711 chan->iobase = card->baseaddr + VIA_BASE0_FM_OUT_CHAN;
712 } else {
713 BUG();
714 }
715
716 init_waitqueue_head (&chan->wait);
717
718 chan->pcm_fmt = VIA_PCM_FMT_MASK;
719 chan->is_enabled = 1;
720
721 chan->frag_number = 0;
722 chan->frag_size = 0;
723 atomic_set(&chan->n_frags, 0);
724 atomic_set (&chan->hw_ptr, 0);
725 }
726
727 /**
728 * via_chan_init - Initialize PCM channel
729 * @card: Private audio chip info
730 * @chan: Channel to be initialized
731 *
732 * Performs some of the preparations necessary to begin
733 * using a PCM channel.
734 *
735 * Currently the preparations consist of
736 * setting the PCM channel to a known state.
737 */
738
739
740 static void via_chan_init (struct via_info *card, struct via_channel *chan)
741 {
742
743 DPRINTK ("ENTER\n");
744
745 /* bzero channel structure, and init members to defaults */
746 via_chan_init_defaults (card, chan);
747
748 /* stop any existing channel output */
749 via_chan_clear (card, chan);
750 via_chan_status_clear (chan->iobase);
751 via_chan_pcm_fmt (chan, 1);
752
753 DPRINTK ("EXIT\n");
754 }
755
756 /**
757 * via_chan_buffer_init - Initialize PCM channel buffer
758 * @card: Private audio chip info
759 * @chan: Channel to be initialized
760 *
761 * Performs some of the preparations necessary to begin
762 * using a PCM channel.
763 *
764 * Currently the preparations include allocating the
765 * scatter-gather DMA table and buffers,
766 * and passing the
767 * address of the DMA table to the hardware.
768 *
769 * Note that special care is taken when passing the
770 * DMA table address to hardware, because it was found
771 * during driver development that the hardware did not
772 * always "take" the address.
773 */
774
775 static int via_chan_buffer_init (struct via_info *card, struct via_channel *chan)
776 {
777 int page, offset;
778 int i;
779
780 DPRINTK ("ENTER\n");
781
782
783 chan->intmask = 0;
784 if(card->intmask)
785 chan->intmask = 0x23; /* Turn on the IRQ bits */
786
787 if (chan->sgtable != NULL) {
788 DPRINTK ("EXIT\n");
789 return 0;
790 }
791
792 /* alloc DMA-able memory for scatter-gather table */
793 chan->sgtable = pci_alloc_consistent (card->pdev,
794 (sizeof (struct via_sgd_table) * chan->frag_number),
795 &chan->sgt_handle);
796 if (!chan->sgtable) {
797 printk (KERN_ERR PFX "DMA table alloc fail, aborting\n");
798 DPRINTK ("EXIT\n");
799 return -ENOMEM;
800 }
801
802 memset ((void*)chan->sgtable, 0,
803 (sizeof (struct via_sgd_table) * chan->frag_number));
804
805 /* alloc DMA-able memory for scatter-gather buffers */
806
807 chan->page_number = (chan->frag_number * chan->frag_size) / PAGE_SIZE +
808 (((chan->frag_number * chan->frag_size) % PAGE_SIZE) ? 1 : 0);
809
810 for (i = 0; i < chan->page_number; i++) {
811 chan->pgtbl[i].cpuaddr = pci_alloc_consistent (card->pdev, PAGE_SIZE,
812 &chan->pgtbl[i].handle);
813
814 if (!chan->pgtbl[i].cpuaddr) {
815 chan->page_number = i;
816 goto err_out_nomem;
817 }
818
819 #ifndef VIA_NDEBUG
820 memset (chan->pgtbl[i].cpuaddr, 0xBC, chan->frag_size);
821 #endif
822
823 #if 1
824 DPRINTK ("dmabuf_pg #%d (h=%lx, v2p=%lx, a=%p)\n",
825 i, (long)chan->pgtbl[i].handle,
826 virt_to_phys(chan->pgtbl[i].cpuaddr),
827 chan->pgtbl[i].cpuaddr);
828 #endif
829 }
830
831 for (i = 0; i < chan->frag_number; i++) {
832
833 page = i / (PAGE_SIZE / chan->frag_size);
834 offset = (i % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
835
836 chan->sgtable[i].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
837 chan->sgtable[i].addr = cpu_to_le32 (chan->pgtbl[page].handle + offset);
838
839 #if 1
840 DPRINTK ("dmabuf #%d (32(h)=%lx)\n",
841 i,
842 (long)chan->sgtable[i].addr);
843 #endif
844 }
845
846 /* overwrite the last buffer information */
847 chan->sgtable[chan->frag_number - 1].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
848
849 /* set location of DMA-able scatter-gather info table */
850 DPRINTK ("outl (0x%X, 0x%04lX)\n",
851 chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
852
853 via_ac97_wait_idle (card);
854 outl (chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
855 udelay (20);
856 via_ac97_wait_idle (card);
857 /* load no rate adaption, stereo 16bit, set up ring slots */
858 if(card->sixchannel)
859 {
860 if(!chan->is_multi)
861 {
862 outl (0xFFFFF | (0x3 << 20) | (chan->frag_number << 24), chan->iobase + VIA_PCM_STOPRATE);
863 udelay (20);
864 via_ac97_wait_idle (card);
865 }
866 }
867
868 DPRINTK ("inl (0x%lX) = %x\n",
869 chan->iobase + VIA_PCM_TABLE_ADDR,
870 inl(chan->iobase + VIA_PCM_TABLE_ADDR));
871
872 DPRINTK ("EXIT\n");
873 return 0;
874
875 err_out_nomem:
876 printk (KERN_ERR PFX "DMA buffer alloc fail, aborting\n");
877 via_chan_buffer_free (card, chan);
878 DPRINTK ("EXIT\n");
879 return -ENOMEM;
880 }
881
882
883 /**
884 * via_chan_free - Release a PCM channel
885 * @card: Private audio chip info
886 * @chan: Channel to be released
887 *
888 * Performs all the functions necessary to clean up
889 * an initialized channel.
890 *
891 * Currently these functions include disabled any
892 * active DMA operations, setting the PCM channel
893 * back to a known state, and releasing any allocated
894 * sound buffers.
895 */
896
897 static void via_chan_free (struct via_info *card, struct via_channel *chan)
898 {
899 DPRINTK ("ENTER\n");
900
901 spin_lock_irq (&card->lock);
902
903 /* stop any existing channel output */
904 via_chan_status_clear (chan->iobase);
905 via_chan_stop (chan->iobase);
906 via_chan_status_clear (chan->iobase);
907
908 spin_unlock_irq (&card->lock);
909
910 synchronize_irq(card->pdev->irq);
911
912 DPRINTK ("EXIT\n");
913 }
914
915 static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan)
916 {
917 int i;
918
919 DPRINTK ("ENTER\n");
920
921 /* zero location of DMA-able scatter-gather info table */
922 via_ac97_wait_idle(card);
923 outl (0, chan->iobase + VIA_PCM_TABLE_ADDR);
924
925 for (i = 0; i < chan->page_number; i++)
926 if (chan->pgtbl[i].cpuaddr) {
927 pci_free_consistent (card->pdev, PAGE_SIZE,
928 chan->pgtbl[i].cpuaddr,
929 chan->pgtbl[i].handle);
930 chan->pgtbl[i].cpuaddr = NULL;
931 chan->pgtbl[i].handle = 0;
932 }
933
934 chan->page_number = 0;
935
936 if (chan->sgtable) {
937 pci_free_consistent (card->pdev,
938 (sizeof (struct via_sgd_table) * chan->frag_number),
939 (void*)chan->sgtable, chan->sgt_handle);
940 chan->sgtable = NULL;
941 }
942
943 DPRINTK ("EXIT\n");
944 }
945
946
947 /**
948 * via_chan_pcm_fmt - Update PCM channel settings
949 * @chan: Channel to be updated
950 * @reset: Boolean. If non-zero, channel will be reset
951 * to 8-bit mono mode.
952 *
953 * Stores the settings of the current PCM format,
954 * 8-bit or 16-bit, and mono/stereo, into the
955 * hardware settings for the specified channel.
956 * If @reset is non-zero, the channel is reset
957 * to 8-bit mono mode. Otherwise, the channel
958 * is set to the values stored in the channel
959 * information struct @chan.
960 */
961
962 static void via_chan_pcm_fmt (struct via_channel *chan, int reset)
963 {
964 DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n",
965 chan->pcm_fmt, reset ? "yes" : "no");
966
967 assert (chan != NULL);
968
969 if (reset)
970 {
971 /* reset to 8-bit mono mode */
972 chan->pcm_fmt = 0;
973 chan->channels = 1;
974 }
975
976 /* enable interrupts on FLAG and EOL */
977 chan->pcm_fmt |= VIA_CHAN_TYPE_MASK;
978
979 /* if we are recording, enable recording fifo bit */
980 if (chan->is_record)
981 chan->pcm_fmt |= VIA_PCM_REC_FIFO;
982 /* set interrupt select bits where applicable (PCM in & out channels) */
983 if (!chan->is_record)
984 chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT;
985
986 DPRINTK("SET FMT - %02x %02x\n", chan->intmask , chan->is_multi);
987
988 if(chan->intmask)
989 {
990 u32 m;
991
992 /*
993 * Channel 0x4 is up to 6 x 16bit and has to be
994 * programmed differently
995 */
996
997 if(chan->is_multi)
998 {
999 u8 c = 0;
1000
1001 /*
1002 * Load the type bit for num channels
1003 * and 8/16bit
1004 */
1005
1006 if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
1007 c = 1 << 7;
1008 if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
1009 c |= (2<<4);
1010 else
1011 c |= (1<<4);
1012
1013 outb(c, chan->iobase + VIA_PCM_TYPE);
1014
1015 /*
1016 * Set the channel steering
1017 * Mono
1018 * Channel 0 to slot 3
1019 * Channel 0 to slot 4
1020 * Stereo
1021 * Channel 0 to slot 3
1022 * Channel 1 to slot 4
1023 */
1024
1025 switch(chan->channels)
1026 {
1027 case 1:
1028 outl(0xFF000000 | (1<<0) | (1<<4) , chan->iobase + VIA_PCM_STOPRATE);
1029 break;
1030 case 2:
1031 outl(0xFF000000 | (1<<0) | (2<<4) , chan->iobase + VIA_PCM_STOPRATE);
1032 break;
1033 case 4:
1034 outl(0xFF000000 | (1<<0) | (2<<4) | (3<<8) | (4<<12), chan->iobase + VIA_PCM_STOPRATE);
1035 break;
1036 case 6:
1037 outl(0xFF000000 | (1<<0) | (2<<4) | (5<<8) | (6<<12) | (3<<16) | (4<<20), chan->iobase + VIA_PCM_STOPRATE);
1038 break;
1039 }
1040 }
1041 else
1042 {
1043 /*
1044 * New style, turn off channel volume
1045 * control, set bits in the right register
1046 */
1047 outb(0x0, chan->iobase + VIA_PCM_LEFTVOL);
1048 outb(0x0, chan->iobase + VIA_PCM_RIGHTVOL);
1049
1050 m = inl(chan->iobase + VIA_PCM_STOPRATE);
1051 m &= ~(3<<20);
1052 if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
1053 m |= (1 << 20);
1054 if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
1055 m |= (1 << 21);
1056 outl(m, chan->iobase + VIA_PCM_STOPRATE);
1057 }
1058 }
1059 else
1060 outb (chan->pcm_fmt, chan->iobase + VIA_PCM_TYPE);
1061
1062
1063 DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n",
1064 chan->pcm_fmt,
1065 inb (chan->iobase + VIA_PCM_TYPE));
1066 }
1067
1068
1069 /**
1070 * via_chan_clear - Stop DMA channel operation, and reset pointers
1071 * @card: the chip to accessed
1072 * @chan: Channel to be cleared
1073 *
1074 * Call via_chan_stop to halt DMA operations, and then resets
1075 * all software pointers which track DMA operation.
1076 */
1077
1078 static void via_chan_clear (struct via_info *card, struct via_channel *chan)
1079 {
1080 DPRINTK ("ENTER\n");
1081 via_chan_stop (chan->iobase);
1082 via_chan_buffer_free(card, chan);
1083 chan->is_active = 0;
1084 chan->is_mapped = 0;
1085 chan->is_enabled = 1;
1086 chan->slop_len = 0;
1087 chan->sw_ptr = 0;
1088 chan->n_irqs = 0;
1089 atomic_set (&chan->hw_ptr, 0);
1090 DPRINTK ("EXIT\n");
1091 }
1092
1093
1094 /**
1095 * via_chan_set_speed - Set PCM sample rate for given channel
1096 * @card: Private info for specified board
1097 * @chan: Channel whose sample rate will be adjusted
1098 * @val: New sample rate, in Khz
1099 *
1100 * Helper function for the %SNDCTL_DSP_SPEED ioctl. OSS semantics
1101 * demand that all audio operations halt (if they are not already
1102 * halted) when the %SNDCTL_DSP_SPEED is given.
1103 *
1104 * This function halts all audio operations for the given channel
1105 * @chan, and then calls via_set_rate to set the audio hardware
1106 * to the new rate.
1107 */
1108
1109 static int via_chan_set_speed (struct via_info *card,
1110 struct via_channel *chan, int val)
1111 {
1112 DPRINTK ("ENTER, requested rate = %d\n", val);
1113
1114 via_chan_clear (card, chan);
1115
1116 val = via_set_rate (card->ac97, chan, val);
1117
1118 DPRINTK ("EXIT, returning %d\n", val);
1119 return val;
1120 }
1121
1122
1123 /**
1124 * via_chan_set_fmt - Set PCM sample size for given channel
1125 * @card: Private info for specified board
1126 * @chan: Channel whose sample size will be adjusted
1127 * @val: New sample size, use the %AFMT_xxx constants
1128 *
1129 * Helper function for the %SNDCTL_DSP_SETFMT ioctl. OSS semantics
1130 * demand that all audio operations halt (if they are not already
1131 * halted) when the %SNDCTL_DSP_SETFMT is given.
1132 *
1133 * This function halts all audio operations for the given channel
1134 * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
1135 * to the new sample size, either 8-bit or 16-bit.
1136 */
1137
1138 static int via_chan_set_fmt (struct via_info *card,
1139 struct via_channel *chan, int val)
1140 {
1141 DPRINTK ("ENTER, val=%s\n",
1142 val == AFMT_U8 ? "AFMT_U8" :
1143 val == AFMT_S16_LE ? "AFMT_S16_LE" :
1144 "unknown");
1145
1146 via_chan_clear (card, chan);
1147
1148 assert (val != AFMT_QUERY); /* this case is handled elsewhere */
1149
1150 switch (val) {
1151 case AFMT_S16_LE:
1152 if ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) == 0) {
1153 chan->pcm_fmt |= VIA_PCM_FMT_16BIT;
1154 via_chan_pcm_fmt (chan, 0);
1155 }
1156 break;
1157
1158 case AFMT_U8:
1159 if (chan->pcm_fmt & VIA_PCM_FMT_16BIT) {
1160 chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT;
1161 via_chan_pcm_fmt (chan, 0);
1162 }
1163 break;
1164
1165 default:
1166 DPRINTK ("unknown AFMT: 0x%X\n", val);
1167 val = AFMT_S16_LE;
1168 }
1169
1170 DPRINTK ("EXIT\n");
1171 return val;
1172 }
1173
1174
1175 /**
1176 * via_chan_set_stereo - Enable or disable stereo for a DMA channel
1177 * @card: Private info for specified board
1178 * @chan: Channel whose stereo setting will be adjusted
1179 * @val: New sample size, use the %AFMT_xxx constants
1180 *
1181 * Helper function for the %SNDCTL_DSP_CHANNELS and %SNDCTL_DSP_STEREO ioctls. OSS semantics
1182 * demand that all audio operations halt (if they are not already
1183 * halted) when %SNDCTL_DSP_CHANNELS or SNDCTL_DSP_STEREO is given.
1184 *
1185 * This function halts all audio operations for the given channel
1186 * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
1187 * to enable or disable stereo.
1188 */
1189
1190 static int via_chan_set_stereo (struct via_info *card,
1191 struct via_channel *chan, int val)
1192 {
1193 DPRINTK ("ENTER, channels = %d\n", val);
1194
1195 via_chan_clear (card, chan);
1196
1197 switch (val) {
1198
1199 /* mono */
1200 case 1:
1201 chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO;
1202 chan->channels = 1;
1203 via_chan_pcm_fmt (chan, 0);
1204 break;
1205
1206 /* stereo */
1207 case 2:
1208 chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
1209 chan->channels = 2;
1210 via_chan_pcm_fmt (chan, 0);
1211 break;
1212
1213 case 4:
1214 case 6:
1215 if(chan->is_multi)
1216 {
1217 chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
1218 chan->channels = val;
1219 break;
1220 }
1221 /* unknown */
1222 default:
1223 val = -EINVAL;
1224 break;
1225 }
1226
1227 DPRINTK ("EXIT, returning %d\n", val);
1228 return val;
1229 }
1230
1231 static int via_chan_set_buffering (struct via_info *card,
1232 struct via_channel *chan, int val)
1233 {
1234 int shift;
1235
1236 DPRINTK ("ENTER\n");
1237
1238 /* in both cases the buffer cannot be changed */
1239 if (chan->is_active || chan->is_mapped) {
1240 DPRINTK ("EXIT\n");
1241 return -EINVAL;
1242 }
1243
1244 /* called outside SETFRAGMENT */
1245 /* set defaults or do nothing */
1246 if (val < 0) {
1247
1248 if (chan->frag_size && chan->frag_number)
1249 goto out;
1250
1251 DPRINTK ("\n");
1252
1253 chan->frag_size = (VIA_DEFAULT_FRAG_TIME * chan->rate * chan->channels
1254 * ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) ? 2 : 1)) / 1000 - 1;
1255
1256 shift = 0;
1257 while (chan->frag_size) {
1258 chan->frag_size >>= 1;
1259 shift++;
1260 }
1261 chan->frag_size = 1 << shift;
1262
1263 chan->frag_number = (VIA_DEFAULT_BUFFER_TIME / VIA_DEFAULT_FRAG_TIME);
1264
1265 DPRINTK ("setting default values %d %d\n", chan->frag_size, chan->frag_number);
1266 } else {
1267 chan->frag_size = 1 << (val & 0xFFFF);
1268 chan->frag_number = (val >> 16) & 0xFFFF;
1269
1270 DPRINTK ("using user values %d %d\n", chan->frag_size, chan->frag_number);
1271 }
1272
1273 /* quake3 wants frag_number to be a power of two */
1274 shift = 0;
1275 while (chan->frag_number) {
1276 chan->frag_number >>= 1;
1277 shift++;
1278 }
1279 chan->frag_number = 1 << shift;
1280
1281 if (chan->frag_size > VIA_MAX_FRAG_SIZE)
1282 chan->frag_size = VIA_MAX_FRAG_SIZE;
1283 else if (chan->frag_size < VIA_MIN_FRAG_SIZE)
1284 chan->frag_size = VIA_MIN_FRAG_SIZE;
1285
1286 if (chan->frag_number < VIA_MIN_FRAG_NUMBER)
1287 chan->frag_number = VIA_MIN_FRAG_NUMBER;
1288 if (chan->frag_number > VIA_MAX_FRAG_NUMBER)
1289 chan->frag_number = VIA_MAX_FRAG_NUMBER;
1290
1291 if ((chan->frag_number * chan->frag_size) / PAGE_SIZE > VIA_MAX_BUFFER_DMA_PAGES)
1292 chan->frag_number = (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE) / chan->frag_size;
1293
1294 out:
1295 if (chan->is_record)
1296 atomic_set (&chan->n_frags, 0);
1297 else
1298 atomic_set (&chan->n_frags, chan->frag_number);
1299
1300 DPRINTK ("EXIT\n");
1301
1302 return 0;
1303 }
1304
1305 #ifdef VIA_CHAN_DUMP_BUFS
1306 /**
1307 * via_chan_dump_bufs - Display DMA table contents
1308 * @chan: Channel whose DMA table will be displayed
1309 *
1310 * Debugging function which displays the contents of the
1311 * scatter-gather DMA table for the given channel @chan.
1312 */
1313
1314 static void via_chan_dump_bufs (struct via_channel *chan)
1315 {
1316 int i;
1317
1318 for (i = 0; i < chan->frag_number; i++) {
1319 DPRINTK ("#%02d: addr=%x, count=%u, flag=%d, eol=%d\n",
1320 i, chan->sgtable[i].addr,
1321 chan->sgtable[i].count & 0x00FFFFFF,
1322 chan->sgtable[i].count & VIA_FLAG ? 1 : 0,
1323 chan->sgtable[i].count & VIA_EOL ? 1 : 0);
1324 }
1325 DPRINTK ("buf_in_use = %d, nextbuf = %d\n",
1326 atomic_read (&chan->buf_in_use),
1327 atomic_read (&chan->sw_ptr));
1328 }
1329 #endif /* VIA_CHAN_DUMP_BUFS */
1330
1331
1332 /**
1333 * via_chan_flush_frag - Flush partially-full playback buffer to hardware
1334 * @chan: Channel whose DMA table will be flushed
1335 *
1336 * Flushes partially-full playback buffer to hardware.
1337 */
1338
1339 static void via_chan_flush_frag (struct via_channel *chan)
1340 {
1341 DPRINTK ("ENTER\n");
1342
1343 assert (chan->slop_len > 0);
1344
1345 if (chan->sw_ptr == (chan->frag_number - 1))
1346 chan->sw_ptr = 0;
1347 else
1348 chan->sw_ptr++;
1349
1350 chan->slop_len = 0;
1351
1352 assert (atomic_read (&chan->n_frags) > 0);
1353 atomic_dec (&chan->n_frags);
1354
1355 DPRINTK ("EXIT\n");
1356 }
1357
1358
1359
1360 /**
1361 * via_chan_maybe_start - Initiate audio hardware DMA operation
1362 * @chan: Channel whose DMA is to be started
1363 *
1364 * Initiate DMA operation, if the DMA engine for the given
1365 * channel @chan is not already active.
1366 */
1367
1368 static inline void via_chan_maybe_start (struct via_channel *chan)
1369 {
1370 assert (chan->is_active == sg_active(chan->iobase));
1371
1372 DPRINTK ("MAYBE START %s\n", chan->name);
1373 if (!chan->is_active && chan->is_enabled) {
1374 chan->is_active = 1;
1375 sg_begin (chan);
1376 DPRINTK ("starting channel %s\n", chan->name);
1377 }
1378 }
1379
1380
1381 /****************************************************************
1382 *
1383 * Interface to ac97-codec module
1384 *
1385 *
1386 */
1387
1388 /**
1389 * via_ac97_wait_idle - Wait until AC97 codec is not busy
1390 * @card: Private info for specified board
1391 *
1392 * Sleep until the AC97 codec is no longer busy.
1393 * Returns the final value read from the SGD
1394 * register being polled.
1395 */
1396
1397 static u8 via_ac97_wait_idle (struct via_info *card)
1398 {
1399 u8 tmp8;
1400 int counter = VIA_COUNTER_LIMIT;
1401
1402 DPRINTK ("ENTER/EXIT\n");
1403
1404 assert (card != NULL);
1405 assert (card->pdev != NULL);
1406
1407 do {
1408 udelay (15);
1409
1410 tmp8 = inb (card->baseaddr + 0x83);
1411 } while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0));
1412
1413 if (tmp8 & VIA_CR83_BUSY)
1414 printk (KERN_WARNING PFX "timeout waiting on AC97 codec\n");
1415 return tmp8;
1416 }
1417
1418
1419 /**
1420 * via_ac97_read_reg - Read AC97 standard register
1421 * @codec: Pointer to generic AC97 codec info
1422 * @reg: Index of AC97 register to be read
1423 *
1424 * Read the value of a single AC97 codec register,
1425 * as defined by the Intel AC97 specification.
1426 *
1427 * Defines the standard AC97 read-register operation
1428 * required by the kernel's ac97_codec interface.
1429 *
1430 * Returns the 16-bit value stored in the specified
1431 * register.
1432 */
1433
1434 static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg)
1435 {
1436 unsigned long data;
1437 struct via_info *card;
1438 int counter;
1439
1440 DPRINTK ("ENTER\n");
1441
1442 assert (codec != NULL);
1443 assert (codec->private_data != NULL);
1444
1445 card = codec->private_data;
1446
1447 spin_lock(&card->ac97_lock);
1448
1449 /* Every time we write to register 80 we cause a transaction.
1450 The only safe way to clear the valid bit is to write it at
1451 the same time as the command */
1452 data = (reg << 16) | VIA_CR80_READ | VIA_CR80_VALID;
1453
1454 outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
1455 udelay (20);
1456
1457 for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
1458 udelay (1);
1459 if ((((data = inl(card->baseaddr + VIA_BASE0_AC97_CTRL)) &
1460 (VIA_CR80_VALID|VIA_CR80_BUSY)) == VIA_CR80_VALID))
1461 goto out;
1462 }
1463
1464 printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data);
1465 goto err_out;
1466
1467 out:
1468 /* Once the valid bit has become set, we must wait a complete AC97
1469 frame before the data has settled. */
1470 udelay(25);
1471 data = (unsigned long) inl (card->baseaddr + VIA_BASE0_AC97_CTRL);
1472
1473 outb (0x02, card->baseaddr + 0x83);
1474
1475 if (((data & 0x007F0000) >> 16) == reg) {
1476 DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n",
1477 data, data & 0x0000FFFF);
1478 spin_unlock(&card->ac97_lock);
1479 return data & 0x0000FFFF;
1480 }
1481
1482 printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n",
1483 reg, ((data & 0x007F0000) >> 16));
1484
1485 err_out:
1486 spin_unlock(&card->ac97_lock);
1487 DPRINTK ("EXIT, returning 0\n");
1488 return 0;
1489 }
1490
1491
1492 /**
1493 * via_ac97_write_reg - Write AC97 standard register
1494 * @codec: Pointer to generic AC97 codec info
1495 * @reg: Index of AC97 register to be written
1496 * @value: Value to be written to AC97 register
1497 *
1498 * Write the value of a single AC97 codec register,
1499 * as defined by the Intel AC97 specification.
1500 *
1501 * Defines the standard AC97 write-register operation
1502 * required by the kernel's ac97_codec interface.
1503 */
1504
1505 static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value)
1506 {
1507 u32 data;
1508 struct via_info *card;
1509 int counter;
1510
1511 DPRINTK ("ENTER\n");
1512
1513 assert (codec != NULL);
1514 assert (codec->private_data != NULL);
1515
1516 card = codec->private_data;
1517
1518 spin_lock(&card->ac97_lock);
1519
1520 data = (reg << 16) + value;
1521 outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
1522 udelay (10);
1523
1524 for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
1525 if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0)
1526 goto out;
1527
1528 udelay (15);
1529 }
1530
1531 printk (KERN_WARNING PFX "timeout after AC97 codec write (0x%X, 0x%X)\n", reg, value);
1532
1533 out:
1534 spin_unlock(&card->ac97_lock);
1535 DPRINTK ("EXIT\n");
1536 }
1537
1538
1539 static int via_mixer_open (struct inode *inode, struct file *file)
1540 {
1541 int minor = iminor(inode);
1542 struct via_info *card;
1543 struct pci_dev *pdev = NULL;
1544 struct pci_driver *drvr;
1545
1546 DPRINTK ("ENTER\n");
1547
1548 while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
1549 drvr = pci_dev_driver (pdev);
1550 if (drvr == &via_driver) {
1551 assert (pci_get_drvdata (pdev) != NULL);
1552
1553 card = pci_get_drvdata (pdev);
1554 if (card->ac97->dev_mixer == minor)
1555 goto match;
1556 }
1557 }
1558
1559 DPRINTK ("EXIT, returning -ENODEV\n");
1560 return -ENODEV;
1561
1562 match:
1563 file->private_data = card->ac97;
1564
1565 DPRINTK ("EXIT, returning 0\n");
1566 return nonseekable_open(inode, file);
1567 }
1568
1569 static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
1570 unsigned long arg)
1571 {
1572 struct ac97_codec *codec = file->private_data;
1573 struct via_info *card;
1574 int nonblock = (file->f_flags & O_NONBLOCK);
1575 int rc;
1576
1577 DPRINTK ("ENTER\n");
1578
1579 assert (codec != NULL);
1580 card = codec->private_data;
1581 assert (card != NULL);
1582
1583 rc = via_syscall_down (card, nonblock);
1584 if (rc) goto out;
1585
1586 #if 0
1587 /*
1588 * Intercept volume control on 8233 and 8235
1589 */
1590 if(card->volume)
1591 {
1592 switch(cmd)
1593 {
1594 case SOUND_MIXER_READ_VOLUME:
1595 return card->mixer_vol;
1596 case SOUND_MIXER_WRITE_VOLUME:
1597 {
1598 int v;
1599 if(get_user(v, (int *)arg))
1600 {
1601 rc = -EFAULT;
1602 goto out;
1603 }
1604 card->mixer_vol = v;
1605 }
1606 }
1607 }
1608 #endif
1609 rc = codec->mixer_ioctl(codec, cmd, arg);
1610
1611 up (&card->syscall_sem);
1612
1613 out:
1614 DPRINTK ("EXIT, returning %d\n", rc);
1615 return rc;
1616 }
1617
1618
1619 static struct file_operations via_mixer_fops = {
1620 .owner = THIS_MODULE,
1621 .open = via_mixer_open,
1622 .llseek = no_llseek,
1623 .ioctl = via_mixer_ioctl,
1624 };
1625
1626
1627 static int __devinit via_ac97_reset (struct via_info *card)
1628 {
1629 struct pci_dev *pdev = card->pdev;
1630 u8 tmp8;
1631 u16 tmp16;
1632
1633 DPRINTK ("ENTER\n");
1634
1635 assert (pdev != NULL);
1636
1637 #ifndef NDEBUG
1638 {
1639 u8 r40,r41,r42,r43,r44,r48;
1640 pci_read_config_byte (card->pdev, 0x40, &r40);
1641 pci_read_config_byte (card->pdev, 0x41, &r41);
1642 pci_read_config_byte (card->pdev, 0x42, &r42);
1643 pci_read_config_byte (card->pdev, 0x43, &r43);
1644 pci_read_config_byte (card->pdev, 0x44, &r44);
1645 pci_read_config_byte (card->pdev, 0x48, &r48);
1646 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
1647 r40,r41,r42,r43,r44,r48);
1648
1649 spin_lock_irq (&card->lock);
1650 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
1651 inb (card->baseaddr + 0x00),
1652 inb (card->baseaddr + 0x01),
1653 inb (card->baseaddr + 0x02),
1654 inl (card->baseaddr + 0x04),
1655 inl (card->baseaddr + 0x0C),
1656 inl (card->baseaddr + 0x80),
1657 inl (card->baseaddr + 0x84));
1658 spin_unlock_irq (&card->lock);
1659
1660 }
1661 #endif
1662
1663 /*
1664 * Reset AC97 controller: enable, disable, enable,
1665 * pausing after each command for good luck. Only
1666 * do this if the codec is not ready, because it causes
1667 * loud pops and such due to such a hard codec reset.
1668 */
1669 pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
1670 if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
1671 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1672 VIA_CR41_AC97_ENABLE |
1673 VIA_CR41_AC97_RESET |
1674 VIA_CR41_AC97_WAKEUP);
1675 udelay (100);
1676
1677 pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
1678 udelay (100);
1679
1680 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1681 VIA_CR41_AC97_ENABLE |
1682 VIA_CR41_PCM_ENABLE |
1683 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1684 udelay (100);
1685 }
1686
1687 /* Make sure VRA is enabled, in case we didn't do a
1688 * complete codec reset, above
1689 */
1690 pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
1691 if (((tmp8 & VIA_CR41_VRA) == 0) ||
1692 ((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
1693 ((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
1694 ((tmp8 & VIA_CR41_AC97_RESET) == 0)) {
1695 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1696 VIA_CR41_AC97_ENABLE |
1697 VIA_CR41_PCM_ENABLE |
1698 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1699 udelay (100);
1700 }
1701
1702 if(card->legacy)
1703 {
1704 #if 0 /* this breaks on K7M */
1705 /* disable legacy stuff */
1706 pci_write_config_byte (pdev, 0x42, 0x00);
1707 udelay(10);
1708 #endif
1709
1710 /* route FM trap to IRQ, disable FM trap */
1711 pci_write_config_byte (pdev, 0x48, 0x05);
1712 udelay(10);
1713 }
1714
1715 /* disable all codec GPI interrupts */
1716 outl (0, pci_resource_start (pdev, 0) + 0x8C);
1717
1718 /* WARNING: this line is magic. Remove this
1719 * and things break. */
1720 /* enable variable rate */
1721 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1722 if ((tmp16 & 1) == 0)
1723 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1724
1725 DPRINTK ("EXIT, returning 0\n");
1726 return 0;
1727 }
1728
1729
1730 static void via_ac97_codec_wait (struct ac97_codec *codec)
1731 {
1732 assert (codec->private_data != NULL);
1733 via_ac97_wait_idle (codec->private_data);
1734 }
1735
1736
1737 static int __devinit via_ac97_init (struct via_info *card)
1738 {
1739 int rc;
1740 u16 tmp16;
1741
1742 DPRINTK ("ENTER\n");
1743
1744 assert (card != NULL);
1745
1746 card->ac97 = ac97_alloc_codec();
1747 if(card->ac97 == NULL)
1748 return -ENOMEM;
1749
1750 card->ac97->private_data = card;
1751 card->ac97->codec_read = via_ac97_read_reg;
1752 card->ac97->codec_write = via_ac97_write_reg;
1753 card->ac97->codec_wait = via_ac97_codec_wait;
1754
1755 card->ac97->dev_mixer = register_sound_mixer (&via_mixer_fops, -1);
1756 if (card->ac97->dev_mixer < 0) {
1757 printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n");
1758 DPRINTK ("EXIT, returning -EIO\n");
1759 ac97_release_codec(card->ac97);
1760 return -EIO;
1761 }
1762
1763 rc = via_ac97_reset (card);
1764 if (rc) {
1765 printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
1766 goto err_out;
1767 }
1768
1769 mdelay(10);
1770
1771 if (ac97_probe_codec (card->ac97) == 0) {
1772 printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
1773 rc = -EIO;
1774 goto err_out;
1775 }
1776
1777 /* enable variable rate */
1778 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1779 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1780
1781 /*
1782 * If we cannot enable VRA, we have a locked-rate codec.
1783 * We try again to enable VRA before assuming so, however.
1784 */
1785 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1786 if ((tmp16 & 1) == 0) {
1787 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1788 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1789 if ((tmp16 & 1) == 0) {
1790 card->locked_rate = 1;
1791 printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
1792 }
1793 }
1794
1795 DPRINTK ("EXIT, returning 0\n");
1796 return 0;
1797
1798 err_out:
1799 unregister_sound_mixer (card->ac97->dev_mixer);
1800 DPRINTK ("EXIT, returning %d\n", rc);
1801 ac97_release_codec(card->ac97);
1802 return rc;
1803 }
1804
1805
1806 static void via_ac97_cleanup (struct via_info *card)
1807 {
1808 DPRINTK ("ENTER\n");
1809
1810 assert (card != NULL);
1811 assert (card->ac97->dev_mixer >= 0);
1812
1813 unregister_sound_mixer (card->ac97->dev_mixer);
1814 ac97_release_codec(card->ac97);
1815
1816 DPRINTK ("EXIT\n");
1817 }
1818
1819
1820
1821 /****************************************************************
1822 *
1823 * Interrupt-related code
1824 *
1825 */
1826
1827 /**
1828 * via_intr_channel - handle an interrupt for a single channel
1829 * @card: unused
1830 * @chan: handle interrupt for this channel
1831 *
1832 * This is the "meat" of the interrupt handler,
1833 * containing the actions taken each time an interrupt
1834 * occurs. All communication and coordination with
1835 * userspace takes place here.
1836 *
1837 * Locking: inside card->lock
1838 */
1839
1840 static void via_intr_channel (struct via_info *card, struct via_channel *chan)
1841 {
1842 u8 status;
1843 int n;
1844
1845 /* check pertinent bits of status register for action bits */
1846 status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED);
1847 if (!status)
1848 return;
1849
1850 /* acknowledge any flagged bits ASAP */
1851 outb (status, chan->iobase);
1852
1853 if (!chan->sgtable) /* XXX: temporary solution */
1854 return;
1855
1856 /* grab current h/w ptr value */
1857 n = atomic_read (&chan->hw_ptr);
1858
1859 /* sanity check: make sure our h/w ptr doesn't have a weird value */
1860 assert (n >= 0);
1861 assert (n < chan->frag_number);
1862
1863
1864 /* reset SGD data structure in memory to reflect a full buffer,
1865 * and advance the h/w ptr, wrapping around to zero if needed
1866 */
1867 if (n == (chan->frag_number - 1)) {
1868 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_EOL);
1869 atomic_set (&chan->hw_ptr, 0);
1870 } else {
1871 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG);
1872 atomic_inc (&chan->hw_ptr);
1873 }
1874
1875 /* accounting crap for SNDCTL_DSP_GETxPTR */
1876 chan->n_irqs++;
1877 chan->bytes += chan->frag_size;
1878 /* FIXME - signed overflow is undefined */
1879 if (chan->bytes < 0) /* handle overflow of 31-bit value */
1880 chan->bytes = chan->frag_size;
1881 /* all following checks only occur when not in mmap(2) mode */
1882 if (!chan->is_mapped)
1883 {
1884 /* If we are recording, then n_frags represents the number
1885 * of fragments waiting to be handled by userspace.
1886 * If we are playback, then n_frags represents the number
1887 * of fragments remaining to be filled by userspace.
1888 * We increment here. If we reach max number of fragments,
1889 * this indicates an underrun/overrun. For this case under OSS,
1890 * we stop the record/playback process.
1891 */
1892 if (atomic_read (&chan->n_frags) < chan->frag_number)
1893 atomic_inc (&chan->n_frags);
1894 assert (atomic_read (&chan->n_frags) <= chan->frag_number);
1895 if (atomic_read (&chan->n_frags) == chan->frag_number) {
1896 chan->is_active = 0;
1897 via_chan_stop (chan->iobase);
1898 }
1899 }
1900 /* wake up anyone listening to see when interrupts occur */
1901 wake_up_all (&chan->wait);
1902
1903 DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n",
1904 chan->name, status, (long) inl (chan->iobase + 0x04),
1905 atomic_read (&chan->hw_ptr));
1906
1907 DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name,
1908 atomic_read (&chan->n_frags), missed);
1909 }
1910
1911
1912 static irqreturn_t via_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1913 {
1914 struct via_info *card = dev_id;
1915 u32 status32;
1916
1917 /* to minimize interrupt sharing costs, we use the SGD status
1918 * shadow register to check the status of all inputs and
1919 * outputs with a single 32-bit bus read. If no interrupt
1920 * conditions are flagged, we exit immediately
1921 */
1922 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1923 if (!(status32 & VIA_INTR_MASK))
1924 {
1925 #ifdef CONFIG_MIDI_VIA82CXXX
1926 if (card->midi_devc)
1927 uart401intr(irq, card->midi_devc, regs);
1928 #endif
1929 return IRQ_HANDLED;
1930 }
1931 DPRINTK ("intr, status32 == 0x%08X\n", status32);
1932
1933 /* synchronize interrupt handling under SMP. this spinlock
1934 * goes away completely on UP
1935 */
1936 spin_lock (&card->lock);
1937
1938 if (status32 & VIA_INTR_OUT)
1939 via_intr_channel (card, &card->ch_out);
1940 if (status32 & VIA_INTR_IN)
1941 via_intr_channel (card, &card->ch_in);
1942 if (status32 & VIA_INTR_FM)
1943 via_intr_channel (card, &card->ch_fm);
1944
1945 spin_unlock (&card->lock);
1946
1947 return IRQ_HANDLED;
1948 }
1949
1950 static irqreturn_t via_new_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1951 {
1952 struct via_info *card = dev_id;
1953 u32 status32;
1954
1955 /* to minimize interrupt sharing costs, we use the SGD status
1956 * shadow register to check the status of all inputs and
1957 * outputs with a single 32-bit bus read. If no interrupt
1958 * conditions are flagged, we exit immediately
1959 */
1960 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1961 if (!(status32 & VIA_NEW_INTR_MASK))
1962 return IRQ_NONE;
1963 /*
1964 * goes away completely on UP
1965 */
1966 spin_lock (&card->lock);
1967
1968 via_intr_channel (card, &card->ch_out);
1969 via_intr_channel (card, &card->ch_in);
1970 via_intr_channel (card, &card->ch_fm);
1971
1972 spin_unlock (&card->lock);
1973 return IRQ_HANDLED;
1974 }
1975
1976
1977 /**
1978 * via_interrupt_init - Initialize interrupt handling
1979 * @card: Private info for specified board
1980 *
1981 * Obtain and reserve IRQ for using in handling audio events.
1982 * Also, disable any IRQ-generating resources, to make sure
1983 * we don't get interrupts before we want them.
1984 */
1985
1986 static int via_interrupt_init (struct via_info *card)
1987 {
1988 u8 tmp8;
1989
1990 DPRINTK ("ENTER\n");
1991
1992 assert (card != NULL);
1993 assert (card->pdev != NULL);
1994
1995 /* check for sane IRQ number. can this ever happen? */
1996 if (card->pdev->irq < 2) {
1997 printk (KERN_ERR PFX "insane IRQ %d, aborting\n",
1998 card->pdev->irq);
1999 DPRINTK ("EXIT, returning -EIO\n");
2000 return -EIO;
2001 }
2002
2003 /* VIA requires this is done */
2004 pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq);
2005
2006 if(card->legacy)
2007 {
2008 /* make sure FM irq is not routed to us */
2009 pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
2010 if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
2011 tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
2012 pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
2013 }
2014 if (request_irq (card->pdev->irq, via_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
2015 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2016 card->pdev->irq);
2017 DPRINTK ("EXIT, returning -EBUSY\n");
2018 return -EBUSY;
2019 }
2020 }
2021 else
2022 {
2023 if (request_irq (card->pdev->irq, via_new_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
2024 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2025 card->pdev->irq);
2026 DPRINTK ("EXIT, returning -EBUSY\n");
2027 return -EBUSY;
2028 }
2029 }
2030
2031 DPRINTK ("EXIT, returning 0\n");
2032 return 0;
2033 }
2034
2035
2036 /****************************************************************
2037 *
2038 * OSS DSP device
2039 *
2040 */
2041
2042 static struct file_operations via_dsp_fops = {
2043 .owner = THIS_MODULE,
2044 .open = via_dsp_open,
2045 .release = via_dsp_release,
2046 .read = via_dsp_read,
2047 .write = via_dsp_write,
2048 .poll = via_dsp_poll,
2049 .llseek = no_llseek,
2050 .ioctl = via_dsp_ioctl,
2051 .mmap = via_dsp_mmap,
2052 };
2053
2054
2055 static int __devinit via_dsp_init (struct via_info *card)
2056 {
2057 u8 tmp8;
2058
2059 DPRINTK ("ENTER\n");
2060
2061 assert (card != NULL);
2062
2063 if(card->legacy)
2064 {
2065 /* turn off legacy features, if not already */
2066 pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
2067 if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE)) {
2068 tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE);
2069 pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8);
2070 }
2071 }
2072
2073 via_stop_everything (card);
2074
2075 card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1);
2076 if (card->dev_dsp < 0) {
2077 DPRINTK ("EXIT, returning -ENODEV\n");
2078 return -ENODEV;
2079 }
2080 DPRINTK ("EXIT, returning 0\n");
2081 return 0;
2082 }
2083
2084
2085 static void via_dsp_cleanup (struct via_info *card)
2086 {
2087 DPRINTK ("ENTER\n");
2088
2089 assert (card != NULL);
2090 assert (card->dev_dsp >= 0);
2091
2092 via_stop_everything (card);
2093
2094 unregister_sound_dsp (card->dev_dsp);
2095
2096 DPRINTK ("EXIT\n");
2097 }
2098
2099
2100 static struct page * via_mm_nopage (struct vm_area_struct * vma,
2101 unsigned long address, int *type)
2102 {
2103 struct via_info *card = vma->vm_private_data;
2104 struct via_channel *chan = &card->ch_out;
2105 struct page *dmapage;
2106 unsigned long pgoff;
2107 int rd, wr;
2108
2109 DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
2110 vma->vm_start,
2111 address - vma->vm_start,
2112 (address - vma->vm_start) >> PAGE_SHIFT,
2113 address);
2114
2115 if (address > vma->vm_end) {
2116 DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
2117 return NOPAGE_SIGBUS; /* Disallow mremap */
2118 }
2119 if (!card) {
2120 DPRINTK ("EXIT, returning NOPAGE_OOM\n");
2121 return NOPAGE_OOM; /* Nothing allocated */
2122 }
2123
2124 pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
2125 rd = card->ch_in.is_mapped;
2126 wr = card->ch_out.is_mapped;
2127
2128 #ifndef VIA_NDEBUG
2129 {
2130 unsigned long max_bufs = chan->frag_number;
2131 if (rd && wr) max_bufs *= 2;
2132 /* via_dsp_mmap() should ensure this */
2133 assert (pgoff < max_bufs);
2134 }
2135 #endif
2136
2137 /* if full-duplex (read+write) and we have two sets of bufs,
2138 * then the playback buffers come first, sez soundcard.c */
2139 if (pgoff >= chan->page_number) {
2140 pgoff -= chan->page_number;
2141 chan = &card->ch_in;
2142 } else if (!wr)
2143 chan = &card->ch_in;
2144
2145 assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
2146
2147 dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
2148 DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
2149 dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
2150 get_page (dmapage);
2151 if (type)
2152 *type = VM_FAULT_MINOR;
2153 return dmapage;
2154 }
2155
2156
2157 #ifndef VM_RESERVED
2158 static int via_mm_swapout (struct page *page, struct file *filp)
2159 {
2160 return 0;
2161 }
2162 #endif /* VM_RESERVED */
2163
2164
2165 static struct vm_operations_struct via_mm_ops = {
2166 .nopage = via_mm_nopage,
2167
2168 #ifndef VM_RESERVED
2169 .swapout = via_mm_swapout,
2170 #endif
2171 };
2172
2173
2174 static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
2175 {
2176 struct via_info *card;
2177 int nonblock = (file->f_flags & O_NONBLOCK);
2178 int rc = -EINVAL, rd=0, wr=0;
2179 unsigned long max_size, size, start, offset;
2180
2181 assert (file != NULL);
2182 assert (vma != NULL);
2183 card = file->private_data;
2184 assert (card != NULL);
2185
2186 DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
2187 vma->vm_start,
2188 vma->vm_end - vma->vm_start,
2189 vma->vm_pgoff);
2190
2191 max_size = 0;
2192 if (vma->vm_flags & VM_READ) {
2193 rd = 1;
2194 via_chan_set_buffering(card, &card->ch_in, -1);
2195 via_chan_buffer_init (card, &card->ch_in);
2196 max_size += card->ch_in.page_number << PAGE_SHIFT;
2197 }
2198 if (vma->vm_flags & VM_WRITE) {
2199 wr = 1;
2200 via_chan_set_buffering(card, &card->ch_out, -1);
2201 via_chan_buffer_init (card, &card->ch_out);
2202 max_size += card->ch_out.page_number << PAGE_SHIFT;
2203 }
2204
2205 start = vma->vm_start;
2206 offset = (vma->vm_pgoff << PAGE_SHIFT);
2207 size = vma->vm_end - vma->vm_start;
2208
2209 /* some basic size/offset sanity checks */
2210 if (size > max_size)
2211 goto out;
2212 if (offset > max_size - size)
2213 goto out;
2214
2215 rc = via_syscall_down (card, nonblock);
2216 if (rc) goto out;
2217
2218 vma->vm_ops = &via_mm_ops;
2219 vma->vm_private_data = card;
2220
2221 #ifdef VM_RESERVED
2222 vma->vm_flags |= VM_RESERVED;
2223 #endif
2224
2225 if (rd)
2226 card->ch_in.is_mapped = 1;
2227 if (wr)
2228 card->ch_out.is_mapped = 1;
2229
2230 up (&card->syscall_sem);
2231 rc = 0;
2232
2233 out:
2234 DPRINTK ("EXIT, returning %d\n", rc);
2235 return rc;
2236 }
2237
2238
2239 static ssize_t via_dsp_do_read (struct via_info *card,
2240 char __user *userbuf, size_t count,
2241 int nonblock)
2242 {
2243 DECLARE_WAITQUEUE(wait, current);
2244 const char __user *orig_userbuf = userbuf;
2245 struct via_channel *chan = &card->ch_in;
2246 size_t size;
2247 int n, tmp;
2248 ssize_t ret = 0;
2249
2250 /* if SGD has not yet been started, start it */
2251 via_chan_maybe_start (chan);
2252
2253 handle_one_block:
2254 /* just to be a nice neighbor */
2255 /* Thomas Sailer:
2256 * But also to ourselves, release semaphore if we do so */
2257 if (need_resched()) {
2258 up(&card->syscall_sem);
2259 schedule ();
2260 ret = via_syscall_down (card, nonblock);
2261 if (ret)
2262 goto out;
2263 }
2264
2265 /* grab current channel software pointer. In the case of
2266 * recording, this is pointing to the next buffer that
2267 * will receive data from the audio hardware.
2268 */
2269 n = chan->sw_ptr;
2270
2271 /* n_frags represents the number of fragments waiting
2272 * to be copied to userland. sleep until at least
2273 * one buffer has been read from the audio hardware.
2274 */
2275 add_wait_queue(&chan->wait, &wait);
2276 for (;;) {
2277 __set_current_state(TASK_INTERRUPTIBLE);
2278 tmp = atomic_read (&chan->n_frags);
2279 assert (tmp >= 0);
2280 assert (tmp <= chan->frag_number);
2281 if (tmp)
2282 break;
2283 if (nonblock || !chan->is_active) {
2284 ret = -EAGAIN;
2285 break;
2286 }
2287
2288 up(&card->syscall_sem);
2289
2290 DPRINTK ("Sleeping on block %d\n", n);
2291 schedule();
2292
2293 ret = via_syscall_down (card, nonblock);
2294 if (ret)
2295 break;
2296
2297 if (signal_pending (current)) {
2298 ret = -ERESTARTSYS;
2299 break;
2300 }
2301 }
2302 set_current_state(TASK_RUNNING);
2303 remove_wait_queue(&chan->wait, &wait);
2304 if (ret)
2305 goto out;
2306
2307 /* Now that we have a buffer we can read from, send
2308 * as much as sample data possible to userspace.
2309 */
2310 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2311 size_t slop_left = chan->frag_size - chan->slop_len;
2312 void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
2313 unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
2314
2315 size = (count < slop_left) ? count : slop_left;
2316 if (copy_to_user (userbuf,
2317 base + ofs + chan->slop_len,
2318 size)) {
2319 ret = -EFAULT;
2320 goto out;
2321 }
2322
2323 count -= size;
2324 chan->slop_len += size;
2325 userbuf += size;
2326 }
2327
2328 /* If we didn't copy the buffer completely to userspace,
2329 * stop now.
2330 */
2331 if (chan->slop_len < chan->frag_size)
2332 goto out;
2333
2334 /*
2335 * If we get to this point, we copied one buffer completely
2336 * to userspace, give the buffer back to the hardware.
2337 */
2338
2339 /* advance channel software pointer to point to
2340 * the next buffer from which we will copy
2341 */
2342 if (chan->sw_ptr == (chan->frag_number - 1))
2343 chan->sw_ptr = 0;
2344 else
2345 chan->sw_ptr++;
2346
2347 /* mark one less buffer waiting to be processed */
2348 assert (atomic_read (&chan->n_frags) > 0);
2349 atomic_dec (&chan->n_frags);
2350
2351 /* we are at a block boundary, there is no fragment data */
2352 chan->slop_len = 0;
2353
2354 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2355 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2356
2357 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2358 inb (card->baseaddr + 0x00),
2359 inb (card->baseaddr + 0x01),
2360 inb (card->baseaddr + 0x02),
2361 inl (card->baseaddr + 0x04),
2362 inl (card->baseaddr + 0x0C),
2363 inl (card->baseaddr + 0x80),
2364 inl (card->baseaddr + 0x84));
2365
2366 if (count > 0)
2367 goto handle_one_block;
2368
2369 out:
2370 return (userbuf != orig_userbuf) ? (userbuf - orig_userbuf) : ret;
2371 }
2372
2373
2374 static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
2375 {
2376 struct via_info *card;
2377 int nonblock = (file->f_flags & O_NONBLOCK);
2378 int rc;
2379
2380 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2381 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2382
2383 assert (file != NULL);
2384 card = file->private_data;
2385 assert (card != NULL);
2386
2387 rc = via_syscall_down (card, nonblock);
2388 if (rc) goto out;
2389
2390 if (card->ch_in.is_mapped) {
2391 rc = -ENXIO;
2392 goto out_up;
2393 }
2394
2395 via_chan_set_buffering(card, &card->ch_in, -1);
2396 rc = via_chan_buffer_init (card, &card->ch_in);
2397
2398 if (rc)
2399 goto out_up;
2400
2401 rc = via_dsp_do_read (card, buffer, count, nonblock);
2402
2403 out_up:
2404 up (&card->syscall_sem);
2405 out:
2406 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2407 return rc;
2408 }
2409
2410
2411 static ssize_t via_dsp_do_write (struct via_info *card,
2412 const char __user *userbuf, size_t count,
2413 int nonblock)
2414 {
2415 DECLARE_WAITQUEUE(wait, current);
2416 const char __user *orig_userbuf = userbuf;
2417 struct via_channel *chan = &card->ch_out;
2418 volatile struct via_sgd_table *sgtable = chan->sgtable;
2419 size_t size;
2420 int n, tmp;
2421 ssize_t ret = 0;
2422
2423 handle_one_block:
2424 /* just to be a nice neighbor */
2425 /* Thomas Sailer:
2426 * But also to ourselves, release semaphore if we do so */
2427 if (need_resched()) {
2428 up(&card->syscall_sem);
2429 schedule ();
2430 ret = via_syscall_down (card, nonblock);
2431 if (ret)
2432 goto out;
2433 }
2434
2435 /* grab current channel fragment pointer. In the case of
2436 * playback, this is pointing to the next fragment that
2437 * should receive data from userland.
2438 */
2439 n = chan->sw_ptr;
2440
2441 /* n_frags represents the number of fragments remaining
2442 * to be filled by userspace. Sleep until
2443 * at least one fragment is available for our use.
2444 */
2445 add_wait_queue(&chan->wait, &wait);
2446 for (;;) {
2447 __set_current_state(TASK_INTERRUPTIBLE);
2448 tmp = atomic_read (&chan->n_frags);
2449 assert (tmp >= 0);
2450 assert (tmp <= chan->frag_number);
2451 if (tmp)
2452 break;
2453 if (nonblock || !chan->is_active) {
2454 ret = -EAGAIN;
2455 break;
2456 }
2457
2458 up(&card->syscall_sem);
2459
2460 DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
2461 schedule();
2462
2463 ret = via_syscall_down (card, nonblock);
2464 if (ret)
2465 break;
2466
2467 if (signal_pending (current)) {
2468 ret = -ERESTARTSYS;
2469 break;
2470 }
2471 }
2472 set_current_state(TASK_RUNNING);
2473 remove_wait_queue(&chan->wait, &wait);
2474 if (ret)
2475 goto out;
2476
2477 /* Now that we have at least one fragment we can write to, fill the buffer
2478 * as much as possible with data from userspace.
2479 */
2480 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2481 size_t slop_left = chan->frag_size - chan->slop_len;
2482
2483 size = (count < slop_left) ? count : slop_left;
2484 if (copy_from_user (chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr + (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size + chan->slop_len,
2485 userbuf, size)) {
2486 ret = -EFAULT;
2487 goto out;
2488 }
2489
2490 count -= size;
2491 chan->slop_len += size;
2492 userbuf += size;
2493 }
2494
2495 /* If we didn't fill up the buffer with data, stop now.
2496 * Put a 'stop' marker in the DMA table too, to tell the
2497 * audio hardware to stop if it gets here.
2498 */
2499 if (chan->slop_len < chan->frag_size) {
2500 sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
2501 goto out;
2502 }
2503
2504 /*
2505 * If we get to this point, we have filled a buffer with
2506 * audio data, flush the buffer to audio hardware.
2507 */
2508
2509 /* Record the true size for the audio hardware to notice */
2510 if (n == (chan->frag_number - 1))
2511 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
2512 else
2513 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
2514
2515 /* advance channel software pointer to point to
2516 * the next buffer we will fill with data
2517 */
2518 if (chan->sw_ptr == (chan->frag_number - 1))
2519 chan->sw_ptr = 0;
2520 else
2521 chan->sw_ptr++;
2522
2523 /* mark one less buffer as being available for userspace consumption */
2524 assert (atomic_read (&chan->n_frags) > 0);
2525 atomic_dec (&chan->n_frags);
2526
2527 /* we are at a block boundary, there is no fragment data */
2528 chan->slop_len = 0;
2529
2530 /* if SGD has not yet been started, start it */
2531 via_chan_maybe_start (chan);
2532
2533 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2534 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2535
2536 DPRINTK ("regs==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n",
2537 inb (card->baseaddr + 0x00),
2538 inb (card->baseaddr + 0x01),
2539 inb (card->baseaddr + 0x02),
2540 inl (card->baseaddr + 0x04),
2541 inl (card->baseaddr + 0x08),
2542 inl (card->baseaddr + 0x0C),
2543 inl (card->baseaddr + 0x80),
2544 inl (card->baseaddr + 0x84));
2545
2546 if (count > 0)
2547 goto handle_one_block;
2548
2549 out:
2550 if (userbuf - orig_userbuf)
2551 return userbuf - orig_userbuf;
2552 else
2553 return ret;
2554 }
2555
2556
2557 static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
2558 {
2559 struct via_info *card;
2560 ssize_t rc;
2561 int nonblock = (file->f_flags & O_NONBLOCK);
2562
2563 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2564 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2565
2566 assert (file != NULL);
2567 card = file->private_data;
2568 assert (card != NULL);
2569
2570 rc = via_syscall_down (card, nonblock);
2571 if (rc) goto out;
2572
2573 if (card->ch_out.is_mapped) {
2574 rc = -ENXIO;
2575 goto out_up;
2576 }
2577
2578 via_chan_set_buffering(card, &card->ch_out, -1);
2579 rc = via_chan_buffer_init (card, &card->ch_out);
2580
2581 if (rc)
2582 goto out_up;
2583
2584 rc = via_dsp_do_write (card, buffer, count, nonblock);
2585
2586 out_up:
2587 up (&card->syscall_sem);
2588 out:
2589 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2590 return rc;
2591 }
2592
2593
2594 static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
2595 {
2596 struct via_info *card;
2597 struct via_channel *chan;
2598 unsigned int mask = 0;
2599
2600 DPRINTK ("ENTER\n");
2601
2602 assert (file != NULL);
2603 card = file->private_data;
2604 assert (card != NULL);
2605
2606 if (file->f_mode & FMODE_READ) {
2607 chan = &card->ch_in;
2608 if (sg_active (chan->iobase))
2609 poll_wait(file, &chan->wait, wait);
2610 if (atomic_read (&chan->n_frags) > 0)
2611 mask |= POLLIN | POLLRDNORM;
2612 }
2613
2614 if (file->f_mode & FMODE_WRITE) {
2615 chan = &card->ch_out;
2616 if (sg_active (chan->iobase))
2617 poll_wait(file, &chan->wait, wait);
2618 if (atomic_read (&chan->n_frags) > 0)
2619 mask |= POLLOUT | POLLWRNORM;
2620 }
2621
2622 DPRINTK ("EXIT, returning %u\n", mask);
2623 return mask;
2624 }
2625
2626
2627 /**
2628 * via_dsp_drain_playback - sleep until all playback samples are flushed
2629 * @card: Private info for specified board
2630 * @chan: Channel to drain
2631 * @nonblock: boolean, non-zero if O_NONBLOCK is set
2632 *
2633 * Sleeps until all playback has been flushed to the audio
2634 * hardware.
2635 *
2636 * Locking: inside card->syscall_sem
2637 */
2638
2639 static int via_dsp_drain_playback (struct via_info *card,
2640 struct via_channel *chan, int nonblock)
2641 {
2642 DECLARE_WAITQUEUE(wait, current);
2643 int ret = 0;
2644
2645 DPRINTK ("ENTER, nonblock = %d\n", nonblock);
2646
2647 if (chan->slop_len > 0)
2648 via_chan_flush_frag (chan);
2649
2650 if (atomic_read (&chan->n_frags) == chan->frag_number)
2651 goto out;
2652
2653 via_chan_maybe_start (chan);
2654
2655 add_wait_queue(&chan->wait, &wait);
2656 for (;;) {
2657 DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number);
2658 __set_current_state(TASK_INTERRUPTIBLE);
2659 if (atomic_read (&chan->n_frags) >= chan->frag_number)
2660 break;
2661
2662 if (nonblock) {
2663 DPRINTK ("EXIT, returning -EAGAIN\n");
2664 ret = -EAGAIN;
2665 break;
2666 }
2667
2668 #ifdef VIA_DEBUG
2669 {
2670 u8 r40,r41,r42,r43,r44,r48;
2671 pci_read_config_byte (card->pdev, 0x40, &r40);
2672 pci_read_config_byte (card->pdev, 0x41, &r41);
2673 pci_read_config_byte (card->pdev, 0x42, &r42);
2674 pci_read_config_byte (card->pdev, 0x43, &r43);
2675 pci_read_config_byte (card->pdev, 0x44, &r44);
2676 pci_read_config_byte (card->pdev, 0x48, &r48);
2677 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2678 r40,r41,r42,r43,r44,r48);
2679
2680 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2681 inb (card->baseaddr + 0x00),
2682 inb (card->baseaddr + 0x01),
2683 inb (card->baseaddr + 0x02),
2684 inl (card->baseaddr + 0x04),
2685 inl (card->baseaddr + 0x0C),
2686 inl (card->baseaddr + 0x80),
2687 inl (card->baseaddr + 0x84));
2688 }
2689
2690 if (!chan->is_active)
2691 printk (KERN_ERR "sleeping but not active\n");
2692 #endif
2693
2694 up(&card->syscall_sem);
2695
2696 DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
2697 schedule();
2698
2699 if ((ret = via_syscall_down (card, nonblock)))
2700 break;
2701
2702 if (signal_pending (current)) {
2703 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
2704 ret = -ERESTARTSYS;
2705 break;
2706 }
2707 }
2708 set_current_state(TASK_RUNNING);
2709 remove_wait_queue(&chan->wait, &wait);
2710
2711 #ifdef VIA_DEBUG
2712 {
2713 u8 r40,r41,r42,r43,r44,r48;
2714 pci_read_config_byte (card->pdev, 0x40, &r40);
2715 pci_read_config_byte (card->pdev, 0x41, &r41);
2716 pci_read_config_byte (card->pdev, 0x42, &r42);
2717 pci_read_config_byte (card->pdev, 0x43, &r43);
2718 pci_read_config_byte (card->pdev, 0x44, &r44);
2719 pci_read_config_byte (card->pdev, 0x48, &r48);
2720 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2721 r40,r41,r42,r43,r44,r48);
2722
2723 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2724 inb (card->baseaddr + 0x00),
2725 inb (card->baseaddr + 0x01),
2726 inb (card->baseaddr + 0x02),
2727 inl (card->baseaddr + 0x04),
2728 inl (card->baseaddr + 0x0C),
2729 inl (card->baseaddr + 0x80),
2730 inl (card->baseaddr + 0x84));
2731
2732 DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
2733 }
2734 #endif
2735
2736 out:
2737 DPRINTK ("EXIT, returning %d\n", ret);
2738 return ret;
2739 }
2740
2741
2742 /**
2743 * via_dsp_ioctl_space - get information about channel buffering
2744 * @card: Private info for specified board
2745 * @chan: pointer to channel-specific info
2746 * @arg: user buffer for returned information
2747 *
2748 * Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
2749 *
2750 * Locking: inside card->syscall_sem
2751 */
2752
2753 static int via_dsp_ioctl_space (struct via_info *card,
2754 struct via_channel *chan,
2755 void __user *arg)
2756 {
2757 audio_buf_info info;
2758
2759 via_chan_set_buffering(card, chan, -1);
2760
2761 info.fragstotal = chan->frag_number;
2762 info.fragsize = chan->frag_size;
2763
2764 /* number of full fragments we can read/write without blocking */
2765 info.fragments = atomic_read (&chan->n_frags);
2766
2767 if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0))
2768 info.fragments--;
2769
2770 /* number of bytes that can be read or written immediately
2771 * without blocking.
2772 */
2773 info.bytes = (info.fragments * chan->frag_size);
2774 if (chan->slop_len % chan->frag_size > 0)
2775 info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size);
2776
2777 DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n",
2778 info.fragstotal,
2779 info.fragsize,
2780 info.fragments,
2781 info.bytes);
2782
2783 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2784 }
2785
2786
2787 /**
2788 * via_dsp_ioctl_ptr - get information about hardware buffer ptr
2789 * @card: Private info for specified board
2790 * @chan: pointer to channel-specific info
2791 * @arg: user buffer for returned information
2792 *
2793 * Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
2794 *
2795 * Locking: inside card->syscall_sem
2796 */
2797
2798 static int via_dsp_ioctl_ptr (struct via_info *card,
2799 struct via_channel *chan,
2800 void __user *arg)
2801 {
2802 count_info info;
2803
2804 spin_lock_irq (&card->lock);
2805
2806 info.bytes = chan->bytes;
2807 info.blocks = chan->n_irqs;
2808 chan->n_irqs = 0;
2809
2810 spin_unlock_irq (&card->lock);
2811
2812 if (chan->is_active) {
2813 unsigned long extra;
2814 info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size;
2815 extra = chan->frag_size - via_sg_offset(chan);
2816 info.ptr += extra;
2817 info.bytes += extra;
2818 } else {
2819 info.ptr = 0;
2820 }
2821
2822 DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n",
2823 info.bytes,
2824 info.blocks,
2825 info.ptr);
2826
2827 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2828 }
2829
2830
2831 static int via_dsp_ioctl_trigger (struct via_channel *chan, int val)
2832 {
2833 int enable, do_something;
2834
2835 if (chan->is_record)
2836 enable = (val & PCM_ENABLE_INPUT);
2837 else
2838 enable = (val & PCM_ENABLE_OUTPUT);
2839
2840 if (!chan->is_enabled && enable) {
2841 do_something = 1;
2842 } else if (chan->is_enabled && !enable) {
2843 do_something = -1;
2844 } else {
2845 do_something = 0;
2846 }
2847
2848 DPRINTK ("enable=%d, do_something=%d\n",
2849 enable, do_something);
2850
2851 if (chan->is_active && do_something)
2852 return -EINVAL;
2853
2854 if (do_something == 1) {
2855 chan->is_enabled = 1;
2856 via_chan_maybe_start (chan);
2857 DPRINTK ("Triggering input\n");
2858 }
2859
2860 else if (do_something == -1) {
2861 chan->is_enabled = 0;
2862 DPRINTK ("Setup input trigger\n");
2863 }
2864
2865 return 0;
2866 }
2867
2868
2869 static int via_dsp_ioctl (struct inode *inode, struct file *file,
2870 unsigned int cmd, unsigned long arg)
2871 {
2872 int rc, rd=0, wr=0, val=0;
2873 struct via_info *card;
2874 struct via_channel *chan;
2875 int nonblock = (file->f_flags & O_NONBLOCK);
2876 int __user *ip = (int __user *)arg;
2877 void __user *p = (void __user *)arg;
2878
2879 assert (file != NULL);
2880 card = file->private_data;
2881 assert (card != NULL);
2882
2883 if (file->f_mode & FMODE_WRITE)
2884 wr = 1;
2885 if (file->f_mode & FMODE_READ)
2886 rd = 1;
2887
2888 rc = via_syscall_down (card, nonblock);
2889 if (rc)
2890 return rc;
2891 rc = -EINVAL;
2892
2893 switch (cmd) {
2894
2895 /* OSS API version. XXX unverified */
2896 case OSS_GETVERSION:
2897 DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n");
2898 rc = put_user (SOUND_VERSION, ip);
2899 break;
2900
2901 /* list of supported PCM data formats */
2902 case SNDCTL_DSP_GETFMTS:
2903 DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n");
2904 rc = put_user (AFMT_U8 | AFMT_S16_LE, ip);
2905 break;
2906
2907 /* query or set current channel's PCM data format */
2908 case SNDCTL_DSP_SETFMT:
2909 if (get_user(val, ip)) {
2910 rc = -EFAULT;
2911 break;
2912 }
2913 DPRINTK ("DSP_SETFMT, val==%d\n", val);
2914 if (val != AFMT_QUERY) {
2915 rc = 0;
2916
2917 if (rd)
2918 rc = via_chan_set_fmt (card, &card->ch_in, val);
2919
2920 if (rc >= 0 && wr)
2921 rc = via_chan_set_fmt (card, &card->ch_out, val);
2922
2923 if (rc < 0)
2924 break;
2925
2926 val = rc;
2927 } else {
2928 if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) ||
2929 (wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT)))
2930 val = AFMT_S16_LE;
2931 else
2932 val = AFMT_U8;
2933 }
2934 DPRINTK ("SETFMT EXIT, returning %d\n", val);
2935 rc = put_user (val, ip);
2936 break;
2937
2938 /* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */
2939 case SNDCTL_DSP_CHANNELS:
2940 if (get_user(val, ip)) {
2941 rc = -EFAULT;
2942 break;
2943 }
2944 DPRINTK ("DSP_CHANNELS, val==%d\n", val);
2945 if (val != 0) {
2946 rc = 0;
2947
2948 if (rd)
2949 rc = via_chan_set_stereo (card, &card->ch_in, val);
2950
2951 if (rc >= 0 && wr)
2952 rc = via_chan_set_stereo (card, &card->ch_out, val);
2953
2954 if (rc < 0)
2955 break;
2956
2957 val = rc;
2958 } else {
2959 if (rd)
2960 val = card->ch_in.channels;
2961 else
2962 val = card->ch_out.channels;
2963 }
2964 DPRINTK ("CHANNELS EXIT, returning %d\n", val);
2965 rc = put_user (val, ip);
2966 break;
2967
2968 /* enable (val is not zero) or disable (val == 0) stereo */
2969 case SNDCTL_DSP_STEREO:
2970 if (get_user(val, ip)) {
2971 rc = -EFAULT;
2972 break;
2973 }
2974 DPRINTK ("DSP_STEREO, val==%d\n", val);
2975 rc = 0;
2976
2977 if (rd)
2978 rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1);
2979 if (rc >= 0 && wr)
2980 rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1);
2981
2982 if (rc < 0)
2983 break;
2984
2985 val = rc - 1;
2986
2987 DPRINTK ("STEREO EXIT, returning %d\n", val);
2988 rc = put_user(val, ip);
2989 break;
2990
2991 /* query or set sampling rate */
2992 case SNDCTL_DSP_SPEED:
2993 if (get_user(val, ip)) {
2994 rc = -EFAULT;
2995 break;
2996 }
2997 DPRINTK ("DSP_SPEED, val==%d\n", val);
2998 if (val < 0) {
2999 rc = -EINVAL;
3000 break;
3001 }
3002 if (val > 0) {
3003 rc = 0;
3004
3005 if (rd)
3006 rc = via_chan_set_speed (card, &card->ch_in, val);
3007 if (rc >= 0 && wr)
3008 rc = via_chan_set_speed (card, &card->ch_out, val);
3009
3010 if (rc < 0)
3011 break;
3012
3013 val = rc;
3014 } else {
3015 if (rd)
3016 val = card->ch_in.rate;
3017 else if (wr)
3018 val = card->ch_out.rate;
3019 else
3020 val = 0;
3021 }
3022 DPRINTK ("SPEED EXIT, returning %d\n", val);
3023 rc = put_user (val, ip);
3024 break;
3025
3026 /* wait until all buffers have been played, and then stop device */
3027 case SNDCTL_DSP_SYNC:
3028 DPRINTK ("DSP_SYNC\n");
3029 rc = 0;
3030 if (wr) {
3031 DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n");
3032 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3033 }
3034 break;
3035
3036 /* stop recording/playback immediately */
3037 case SNDCTL_DSP_RESET:
3038 DPRINTK ("DSP_RESET\n");
3039 if (rd) {
3040 via_chan_clear (card, &card->ch_in);
3041 card->ch_in.frag_number = 0;
3042 card->ch_in.frag_size = 0;
3043 atomic_set(&card->ch_in.n_frags, 0);
3044 }
3045
3046 if (wr) {
3047 via_chan_clear (card, &card->ch_out);
3048 card->ch_out.frag_number = 0;
3049 card->ch_out.frag_size = 0;
3050 atomic_set(&card->ch_out.n_frags, 0);
3051 }
3052
3053 rc = 0;
3054 break;
3055
3056 case SNDCTL_DSP_NONBLOCK:
3057 file->f_flags |= O_NONBLOCK;
3058 rc = 0;
3059 break;
3060
3061 /* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
3062 case SNDCTL_DSP_GETCAPS:
3063 DPRINTK ("DSP_GETCAPS\n");
3064 rc = put_user(VIA_DSP_CAP, ip);
3065 break;
3066
3067 /* obtain buffer fragment size */
3068 case SNDCTL_DSP_GETBLKSIZE:
3069 DPRINTK ("DSP_GETBLKSIZE\n");
3070
3071 if (rd) {
3072 via_chan_set_buffering(card, &card->ch_in, -1);
3073 rc = put_user(card->ch_in.frag_size, ip);
3074 } else if (wr) {
3075 via_chan_set_buffering(card, &card->ch_out, -1);
3076 rc = put_user(card->ch_out.frag_size, ip);
3077 }
3078 break;
3079
3080 /* obtain information about input buffering */
3081 case SNDCTL_DSP_GETISPACE:
3082 DPRINTK ("DSP_GETISPACE\n");
3083 if (rd)
3084 rc = via_dsp_ioctl_space (card, &card->ch_in, p);
3085 break;
3086
3087 /* obtain information about output buffering */
3088 case SNDCTL_DSP_GETOSPACE:
3089 DPRINTK ("DSP_GETOSPACE\n");
3090 if (wr)
3091 rc = via_dsp_ioctl_space (card, &card->ch_out, p);
3092 break;
3093
3094 /* obtain information about input hardware pointer */
3095 case SNDCTL_DSP_GETIPTR:
3096 DPRINTK ("DSP_GETIPTR\n");
3097 if (rd)
3098 rc = via_dsp_ioctl_ptr (card, &card->ch_in, p);
3099 break;
3100
3101 /* obtain information about output hardware pointer */
3102 case SNDCTL_DSP_GETOPTR:
3103 DPRINTK ("DSP_GETOPTR\n");
3104 if (wr)
3105 rc = via_dsp_ioctl_ptr (card, &card->ch_out, p);
3106 break;
3107
3108 /* return number of bytes remaining to be played by DMA engine */
3109 case SNDCTL_DSP_GETODELAY:
3110 {
3111 DPRINTK ("DSP_GETODELAY\n");
3112
3113 chan = &card->ch_out;
3114
3115 if (!wr)
3116 break;
3117
3118 if (chan->is_active) {
3119
3120 val = chan->frag_number - atomic_read (&chan->n_frags);
3121
3122 assert(val >= 0);
3123
3124 if (val > 0) {
3125 val *= chan->frag_size;
3126 val -= chan->frag_size - via_sg_offset(chan);
3127 }
3128 val += chan->slop_len % chan->frag_size;
3129 } else
3130 val = 0;
3131
3132 assert (val <= (chan->frag_size * chan->frag_number));
3133
3134 DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val);
3135 rc = put_user (val, ip);
3136 break;
3137 }
3138
3139 /* handle the quick-start of a channel,
3140 * or the notification that a quick-start will
3141 * occur in the future
3142 */
3143 case SNDCTL_DSP_SETTRIGGER:
3144 if (get_user(val, ip)) {
3145 rc = -EFAULT;
3146 break;
3147 }
3148 DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n",
3149 rd, wr, card->ch_in.is_active, card->ch_out.is_active,
3150 card->ch_in.is_enabled, card->ch_out.is_enabled);
3151
3152 rc = 0;
3153
3154 if (rd)
3155 rc = via_dsp_ioctl_trigger (&card->ch_in, val);
3156
3157 if (!rc && wr)
3158 rc = via_dsp_ioctl_trigger (&card->ch_out, val);
3159
3160 break;
3161
3162 case SNDCTL_DSP_GETTRIGGER:
3163 val = 0;
3164 if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled)
3165 val |= PCM_ENABLE_INPUT;
3166 if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled)
3167 val |= PCM_ENABLE_OUTPUT;
3168 rc = put_user(val, ip);
3169 break;
3170
3171 /* Enable full duplex. Since we do this as soon as we are opened
3172 * with O_RDWR, this is mainly a no-op that always returns success.
3173 */
3174 case SNDCTL_DSP_SETDUPLEX:
3175 DPRINTK ("DSP_SETDUPLEX\n");
3176 if (!rd || !wr)
3177 break;
3178 rc = 0;
3179 break;
3180
3181 /* set fragment size. implemented as a successful no-op for now */
3182 case SNDCTL_DSP_SETFRAGMENT:
3183 if (get_user(val, ip)) {
3184 rc = -EFAULT;
3185 break;
3186 }
3187 DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val);
3188
3189 if (rd)
3190 rc = via_chan_set_buffering(card, &card->ch_in, val);
3191
3192 if (wr)
3193 rc = via_chan_set_buffering(card, &card->ch_out, val);
3194
3195 DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
3196 val & 0xFFFF,
3197 val & 0xFFFF,
3198 (val >> 16) & 0xFFFF,
3199 (val >> 16) & 0xFFFF);
3200
3201 rc = 0;
3202 break;
3203
3204 /* inform device of an upcoming pause in input (or output). */
3205 case SNDCTL_DSP_POST:
3206 DPRINTK ("DSP_POST\n");
3207 if (wr) {
3208 if (card->ch_out.slop_len > 0)
3209 via_chan_flush_frag (&card->ch_out);
3210 via_chan_maybe_start (&card->ch_out);
3211 }
3212
3213 rc = 0;
3214 break;
3215
3216 /* not implemented */
3217 default:
3218 DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n",
3219 cmd, p);
3220 break;
3221 }
3222
3223 up (&card->syscall_sem);
3224 DPRINTK ("EXIT, returning %d\n", rc);
3225 return rc;
3226 }
3227
3228
3229 static int via_dsp_open (struct inode *inode, struct file *file)
3230 {
3231 int minor = iminor(inode);
3232 struct via_info *card;
3233 struct pci_dev *pdev = NULL;
3234 struct via_channel *chan;
3235 struct pci_driver *drvr;
3236 int nonblock = (file->f_flags & O_NONBLOCK);
3237
3238 DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
3239
3240 if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) {
3241 DPRINTK ("EXIT, returning -EINVAL\n");
3242 return -EINVAL;
3243 }
3244
3245 card = NULL;
3246 while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
3247 drvr = pci_dev_driver (pdev);
3248 if (drvr == &via_driver) {
3249 assert (pci_get_drvdata (pdev) != NULL);
3250
3251 card = pci_get_drvdata (pdev);
3252 DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
3253 card->dev_dsp, minor,
3254 (card->dev_dsp ^ minor) & ~0xf);
3255
3256 if (((card->dev_dsp ^ minor) & ~0xf) == 0)
3257 goto match;
3258 }
3259 }
3260
3261 DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
3262 return -ENODEV;
3263
3264 match:
3265 if (nonblock) {
3266 if (down_trylock (&card->open_sem)) {
3267 DPRINTK ("EXIT, returning -EAGAIN\n");
3268 return -EAGAIN;
3269 }
3270 } else {
3271 if (down_interruptible (&card->open_sem)) {
3272 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
3273 return -ERESTARTSYS;
3274 }
3275 }
3276
3277 file->private_data = card;
3278 DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
3279
3280 /* handle input from analog source */
3281 if (file->f_mode & FMODE_READ) {
3282 chan = &card->ch_in;
3283
3284 via_chan_init (card, chan);
3285
3286 /* why is this forced to 16-bit stereo in all drivers? */
3287 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3288 chan->channels = 2;
3289
3290 // TO DO - use FIFO: via_capture_fifo(card, 1);
3291 via_chan_pcm_fmt (chan, 0);
3292 via_set_rate (card->ac97, chan, 44100);
3293 }
3294
3295 /* handle output to analog source */
3296 if (file->f_mode & FMODE_WRITE) {
3297 chan = &card->ch_out;
3298
3299 via_chan_init (card, chan);
3300
3301 if (file->f_mode & FMODE_READ) {
3302 /* if in duplex mode make the recording and playback channels
3303 have the same settings */
3304 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3305 chan->channels = 2;
3306 via_chan_pcm_fmt (chan, 0);
3307 via_set_rate (card->ac97, chan, 44100);
3308 } else {
3309 if ((minor & 0xf) == SND_DEV_DSP16) {
3310 chan->pcm_fmt = VIA_PCM_FMT_16BIT;
3311 via_chan_pcm_fmt (chan, 0);
3312 via_set_rate (card->ac97, chan, 44100);
3313 } else {
3314 via_chan_pcm_fmt (chan, 1);
3315 via_set_rate (card->ac97, chan, 8000);
3316 }
3317 }
3318 }
3319
3320 DPRINTK ("EXIT, returning 0\n");
3321 return nonseekable_open(inode, file);
3322 }
3323
3324
3325 static int via_dsp_release(struct inode *inode, struct file *file)
3326 {
3327 struct via_info *card;
3328 int nonblock = (file->f_flags & O_NONBLOCK);
3329 int rc;
3330
3331 DPRINTK ("ENTER\n");
3332
3333 assert (file != NULL);
3334 card = file->private_data;
3335 assert (card != NULL);
3336
3337 rc = via_syscall_down (card, nonblock);
3338 if (rc) {
3339 DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc);
3340 return rc;
3341 }
3342
3343 if (file->f_mode & FMODE_WRITE) {
3344 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3345 if (rc && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */
3346 printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
3347
3348 via_chan_free (card, &card->ch_out);
3349 via_chan_buffer_free(card, &card->ch_out);
3350 }
3351
3352 if (file->f_mode & FMODE_READ) {
3353 via_chan_free (card, &card->ch_in);
3354 via_chan_buffer_free (card, &card->ch_in);
3355 }
3356
3357 up (&card->syscall_sem);
3358 up (&card->open_sem);
3359
3360 DPRINTK ("EXIT, returning 0\n");
3361 return 0;
3362 }
3363
3364
3365 /****************************************************************
3366 *
3367 * Chip setup and kernel registration
3368 *
3369 *
3370 */
3371
3372 static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
3373 {
3374 #ifdef CONFIG_MIDI_VIA82CXXX
3375 u8 r42;
3376 #endif
3377 int rc;
3378 struct via_info *card;
3379 static int printed_version;
3380
3381 DPRINTK ("ENTER\n");
3382
3383 if (printed_version++ == 0)
3384 printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n");
3385
3386 rc = pci_enable_device (pdev);
3387 if (rc)
3388 goto err_out;
3389
3390 rc = pci_request_regions (pdev, "via82cxxx_audio");
3391 if (rc)
3392 goto err_out_disable;
3393
3394 rc = pci_set_dma_mask(pdev, 0xffffffffULL);
3395 if (rc)
3396 goto err_out_res;
3397 rc = pci_set_consistent_dma_mask(pdev, 0xffffffffULL);
3398 if (rc)
3399 goto err_out_res;
3400
3401 card = kmalloc (sizeof (*card), GFP_KERNEL);
3402 if (!card) {
3403 printk (KERN_ERR PFX "out of memory, aborting\n");
3404 rc = -ENOMEM;
3405 goto err_out_res;
3406 }
3407
3408 pci_set_drvdata (pdev, card);
3409
3410 memset (card, 0, sizeof (*card));
3411 card->pdev = pdev;
3412 card->baseaddr = pci_resource_start (pdev, 0);
3413 card->card_num = via_num_cards++;
3414 spin_lock_init (&card->lock);
3415 spin_lock_init (&card->ac97_lock);
3416 init_MUTEX (&card->syscall_sem);
3417 init_MUTEX (&card->open_sem);
3418
3419 /* we must init these now, in case the intr handler needs them */
3420 via_chan_init_defaults (card, &card->ch_out);
3421 via_chan_init_defaults (card, &card->ch_in);
3422 via_chan_init_defaults (card, &card->ch_fm);
3423
3424 /* if BAR 2 is present, chip is Rev H or later,
3425 * which means it has a few extra features */
3426 if (pci_resource_start (pdev, 2) > 0)
3427 card->rev_h = 1;
3428
3429 /* Overkill for now, but more flexible done right */
3430
3431 card->intmask = id->driver_data;
3432 card->legacy = !card->intmask;
3433 card->sixchannel = id->driver_data;
3434
3435 if(card->sixchannel)
3436 printk(KERN_INFO PFX "Six channel audio available\n");
3437 if (pdev->irq < 1) {
3438 printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq);
3439 rc = -ENODEV;
3440 goto err_out_kfree;
3441 }
3442
3443 if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) {
3444 printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n");
3445 rc = -ENODEV;
3446 goto err_out_kfree;
3447 }
3448
3449 pci_set_master(pdev);
3450
3451 /*
3452 * init AC97 mixer and codec
3453 */
3454 rc = via_ac97_init (card);
3455 if (rc) {
3456 printk (KERN_ERR PFX "AC97 init failed, aborting\n");
3457 goto err_out_kfree;
3458 }
3459
3460 /*
3461 * init DSP device
3462 */
3463 rc = via_dsp_init (card);
3464 if (rc) {
3465 printk (KERN_ERR PFX "DSP device init failed, aborting\n");
3466 goto err_out_have_mixer;
3467 }
3468
3469 /*
3470 * init and turn on interrupts, as the last thing we do
3471 */
3472 rc = via_interrupt_init (card);
3473 if (rc) {
3474 printk (KERN_ERR PFX "interrupt init failed, aborting\n");
3475 goto err_out_have_dsp;
3476 }
3477
3478 printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
3479 card->card_num + 1, card->baseaddr, pdev->irq);
3480
3481 #ifdef CONFIG_MIDI_VIA82CXXX
3482 /* Disable by default */
3483 card->midi_info.io_base = 0;
3484
3485 if(card->legacy)
3486 {
3487 pci_read_config_byte (pdev, 0x42, &r42);
3488 /* Disable MIDI interrupt */
3489 pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK);
3490 if (r42 & VIA_CR42_MIDI_ENABLE)
3491 {
3492 if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */
3493 card->midi_info.io_base = pci_resource_start (pdev, 2);
3494 else /* Address selected by byte 0x43 */
3495 {
3496 u8 r43;
3497 pci_read_config_byte (pdev, 0x43, &r43);
3498 card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2);
3499 }
3500
3501 card->midi_info.irq = -pdev->irq;
3502 if (probe_uart401(& card->midi_info, THIS_MODULE))
3503 {
3504 card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc;
3505 pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK);
3506 printk("Enabled Via MIDI\n");
3507 }
3508 }
3509 }
3510 #endif
3511
3512 DPRINTK ("EXIT, returning 0\n");
3513 return 0;
3514
3515 err_out_have_dsp:
3516 via_dsp_cleanup (card);
3517
3518 err_out_have_mixer:
3519 via_ac97_cleanup (card);
3520
3521 err_out_kfree:
3522 #ifndef VIA_NDEBUG
3523 memset (card, 0xAB, sizeof (*card)); /* poison memory */
3524 #endif
3525 kfree (card);
3526
3527 err_out_res:
3528 pci_release_regions (pdev);
3529
3530 err_out_disable:
3531 pci_disable_device (pdev);
3532
3533 err_out:
3534 pci_set_drvdata (pdev, NULL);
3535 DPRINTK ("EXIT - returning %d\n", rc);
3536 return rc;
3537 }
3538
3539
3540 static void __devexit via_remove_one (struct pci_dev *pdev)
3541 {
3542 struct via_info *card;
3543
3544 DPRINTK ("ENTER\n");
3545
3546 assert (pdev != NULL);
3547 card = pci_get_drvdata (pdev);
3548 assert (card != NULL);
3549
3550 #ifdef CONFIG_MIDI_VIA82CXXX
3551 if (card->midi_info.io_base)
3552 unload_uart401(&card->midi_info);
3553 #endif
3554
3555 free_irq (card->pdev->irq, card);
3556 via_dsp_cleanup (card);
3557 via_ac97_cleanup (card);
3558
3559 #ifndef VIA_NDEBUG
3560 memset (card, 0xAB, sizeof (*card)); /* poison memory */
3561 #endif
3562 kfree (card);
3563
3564 pci_set_drvdata (pdev, NULL);
3565
3566 pci_release_regions (pdev);
3567 pci_disable_device (pdev);
3568 pci_set_power_state (pdev, 3); /* ...zzzzzz */
3569
3570 DPRINTK ("EXIT\n");
3571 return;
3572 }
3573
3574
3575 /****************************************************************
3576 *
3577 * Driver initialization and cleanup
3578 *
3579 *
3580 */
3581
3582 static int __init init_via82cxxx_audio(void)
3583 {
3584 int rc;
3585
3586 DPRINTK ("ENTER\n");
3587
3588 rc = pci_register_driver (&via_driver);
3589 if (rc) {
3590 DPRINTK ("EXIT, returning %d\n", rc);
3591 return rc;
3592 }
3593
3594 DPRINTK ("EXIT, returning 0\n");
3595 return 0;
3596 }
3597
3598
3599 static void __exit cleanup_via82cxxx_audio(void)
3600 {
3601 DPRINTK ("ENTER\n");
3602
3603 pci_unregister_driver (&via_driver);
3604
3605 DPRINTK ("EXIT\n");
3606 }
3607
3608
3609 module_init(init_via82cxxx_audio);
3610 module_exit(cleanup_via82cxxx_audio);
3611
3612 MODULE_AUTHOR("Jeff Garzik");
3613 MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
3614 MODULE_LICENSE("GPL");
3615
Linux with added FPC-III support