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[PATCH] w1: kconfig/Makefile fix.
[linux-2.6/verdex.git] / sound / oss / via82cxxx_audio.c
blob83edda93f0b478fd9c05ff3928610027c01e38ed
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 <linux/dma-mapping.h>
39 #include <asm/io.h>
40 #include <asm/uaccess.h>
41 #include <asm/semaphore.h>
42 #include "sound_config.h"
43 #include "dev_table.h"
44 #include "mpu401.h"
45
46
47 #undef VIA_DEBUG /* define to enable debugging output and checks */
48 #ifdef VIA_DEBUG
49 /* note: prints function name for you */
50 #define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
51 #else
52 #define DPRINTK(fmt, args...)
53 #endif
54
55 #undef VIA_NDEBUG /* define to disable lightweight runtime checks */
56 #ifdef VIA_NDEBUG
57 #define assert(expr)
58 #else
59 #define assert(expr) \
60 if(!(expr)) { \
61 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
62 #expr,__FILE__,__FUNCTION__,__LINE__); \
63 }
64 #endif
65
66 #define VIA_SUPPORT_MMAP 1 /* buggy, for now... */
67
68 #define MAX_CARDS 1
69
70 #define VIA_CARD_NAME "VIA 82Cxxx Audio driver " VIA_VERSION
71 #define VIA_MODULE_NAME "via82cxxx"
72 #define PFX VIA_MODULE_NAME ": "
73
74 #define VIA_COUNTER_LIMIT 100000
75
76 /* size of DMA buffers */
77 #define VIA_MAX_BUFFER_DMA_PAGES 32
78
79 /* buffering default values in ms */
80 #define VIA_DEFAULT_FRAG_TIME 20
81 #define VIA_DEFAULT_BUFFER_TIME 500
82
83 /* the hardware has a 256 fragment limit */
84 #define VIA_MIN_FRAG_NUMBER 2
85 #define VIA_MAX_FRAG_NUMBER 128
86
87 #define VIA_MAX_FRAG_SIZE PAGE_SIZE
88 #define VIA_MIN_FRAG_SIZE (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE / VIA_MAX_FRAG_NUMBER)
89
90
91 /* 82C686 function 5 (audio codec) PCI configuration registers */
92 #define VIA_ACLINK_STATUS 0x40
93 #define VIA_ACLINK_CTRL 0x41
94 #define VIA_FUNC_ENABLE 0x42
95 #define VIA_PNP_CONTROL 0x43
96 #define VIA_FM_NMI_CTRL 0x48
97
98 /*
99 * controller base 0 (scatter-gather) registers
100 *
101 * NOTE: Via datasheet lists first channel as "read"
102 * channel and second channel as "write" channel.
103 * I changed the naming of the constants to be more
104 * clear than I felt the datasheet to be.
105 */
106
107 #define VIA_BASE0_PCM_OUT_CHAN 0x00 /* output PCM to user */
108 #define VIA_BASE0_PCM_OUT_CHAN_STATUS 0x00
109 #define VIA_BASE0_PCM_OUT_CHAN_CTRL 0x01
110 #define VIA_BASE0_PCM_OUT_CHAN_TYPE 0x02
111
112 #define VIA_BASE0_PCM_IN_CHAN 0x10 /* input PCM from user */
113 #define VIA_BASE0_PCM_IN_CHAN_STATUS 0x10
114 #define VIA_BASE0_PCM_IN_CHAN_CTRL 0x11
115 #define VIA_BASE0_PCM_IN_CHAN_TYPE 0x12
116
117 /* offsets from base */
118 #define VIA_PCM_STATUS 0x00
119 #define VIA_PCM_CONTROL 0x01
120 #define VIA_PCM_TYPE 0x02
121 #define VIA_PCM_LEFTVOL 0x02
122 #define VIA_PCM_RIGHTVOL 0x03
123 #define VIA_PCM_TABLE_ADDR 0x04
124 #define VIA_PCM_STOPRATE 0x08 /* 8233+ */
125 #define VIA_PCM_BLOCK_COUNT 0x0C
126
127 /* XXX unused DMA channel for FM PCM data */
128 #define VIA_BASE0_FM_OUT_CHAN 0x20
129 #define VIA_BASE0_FM_OUT_CHAN_STATUS 0x20
130 #define VIA_BASE0_FM_OUT_CHAN_CTRL 0x21
131 #define VIA_BASE0_FM_OUT_CHAN_TYPE 0x22
132
133 /* Six channel audio output on 8233 */
134 #define VIA_BASE0_MULTI_OUT_CHAN 0x40
135 #define VIA_BASE0_MULTI_OUT_CHAN_STATUS 0x40
136 #define VIA_BASE0_MULTI_OUT_CHAN_CTRL 0x41
137 #define VIA_BASE0_MULTI_OUT_CHAN_TYPE 0x42
138
139 #define VIA_BASE0_AC97_CTRL 0x80
140 #define VIA_BASE0_SGD_STATUS_SHADOW 0x84
141 #define VIA_BASE0_GPI_INT_ENABLE 0x8C
142 #define VIA_INTR_OUT ((1<<0) | (1<<4) | (1<<8))
143 #define VIA_INTR_IN ((1<<1) | (1<<5) | (1<<9))
144 #define VIA_INTR_FM ((1<<2) | (1<<6) | (1<<10))
145 #define VIA_INTR_MASK (VIA_INTR_OUT | VIA_INTR_IN | VIA_INTR_FM)
146
147 /* Newer VIA we need to monitor the low 3 bits of each channel. This
148 mask covers the channels we don't yet use as well
149 */
150
151 #define VIA_NEW_INTR_MASK 0x77077777UL
152
153 /* VIA_BASE0_AUDIO_xxx_CHAN_TYPE bits */
154 #define VIA_IRQ_ON_FLAG (1<<0) /* int on each flagged scatter block */
155 #define VIA_IRQ_ON_EOL (1<<1) /* int at end of scatter list */
156 #define VIA_INT_SEL_PCI_LAST_LINE_READ (0) /* int at PCI read of last line */
157 #define VIA_INT_SEL_LAST_SAMPLE_SENT (1<<2) /* int at last sample sent */
158 #define VIA_INT_SEL_ONE_LINE_LEFT (1<<3) /* int at less than one line to send */
159 #define VIA_PCM_FMT_STEREO (1<<4) /* PCM stereo format (bit clear == mono) */
160 #define VIA_PCM_FMT_16BIT (1<<5) /* PCM 16-bit format (bit clear == 8-bit) */
161 #define VIA_PCM_REC_FIFO (1<<6) /* PCM Recording FIFO */
162 #define VIA_RESTART_SGD_ON_EOL (1<<7) /* restart scatter-gather at EOL */
163 #define VIA_PCM_FMT_MASK (VIA_PCM_FMT_STEREO|VIA_PCM_FMT_16BIT)
164 #define VIA_CHAN_TYPE_MASK (VIA_RESTART_SGD_ON_EOL | \
165 VIA_IRQ_ON_FLAG | \
166 VIA_IRQ_ON_EOL)
167 #define VIA_CHAN_TYPE_INT_SELECT (VIA_INT_SEL_LAST_SAMPLE_SENT)
168
169 /* PCI configuration register bits and masks */
170 #define VIA_CR40_AC97_READY 0x01
171 #define VIA_CR40_AC97_LOW_POWER 0x02
172 #define VIA_CR40_SECONDARY_READY 0x04
173
174 #define VIA_CR41_AC97_ENABLE 0x80 /* enable AC97 codec */
175 #define VIA_CR41_AC97_RESET 0x40 /* clear bit to reset AC97 */
176 #define VIA_CR41_AC97_WAKEUP 0x20 /* wake up from power-down mode */
177 #define VIA_CR41_AC97_SDO 0x10 /* force Serial Data Out (SDO) high */
178 #define VIA_CR41_VRA 0x08 /* enable variable sample rate */
179 #define VIA_CR41_PCM_ENABLE 0x04 /* AC Link SGD Read Channel PCM Data Output */
180 #define VIA_CR41_FM_PCM_ENABLE 0x02 /* AC Link FM Channel PCM Data Out */
181 #define VIA_CR41_SB_PCM_ENABLE 0x01 /* AC Link SB PCM Data Output */
182 #define VIA_CR41_BOOT_MASK (VIA_CR41_AC97_ENABLE | \
183 VIA_CR41_AC97_WAKEUP | \
184 VIA_CR41_AC97_SDO)
185 #define VIA_CR41_RUN_MASK (VIA_CR41_AC97_ENABLE | \
186 VIA_CR41_AC97_RESET | \
187 VIA_CR41_VRA | \
188 VIA_CR41_PCM_ENABLE)
189
190 #define VIA_CR42_SB_ENABLE 0x01
191 #define VIA_CR42_MIDI_ENABLE 0x02
192 #define VIA_CR42_FM_ENABLE 0x04
193 #define VIA_CR42_GAME_ENABLE 0x08
194 #define VIA_CR42_MIDI_IRQMASK 0x40
195 #define VIA_CR42_MIDI_PNP 0x80
196
197 #define VIA_CR44_SECOND_CODEC_SUPPORT (1 << 6)
198 #define VIA_CR44_AC_LINK_ACCESS (1 << 7)
199
200 #define VIA_CR48_FM_TRAP_TO_NMI (1 << 2)
201
202 /* controller base 0 register bitmasks */
203 #define VIA_INT_DISABLE_MASK (~(0x01|0x02))
204 #define VIA_SGD_STOPPED (1 << 2)
205 #define VIA_SGD_PAUSED (1 << 6)
206 #define VIA_SGD_ACTIVE (1 << 7)
207 #define VIA_SGD_TERMINATE (1 << 6)
208 #define VIA_SGD_FLAG (1 << 0)
209 #define VIA_SGD_EOL (1 << 1)
210 #define VIA_SGD_START (1 << 7)
211
212 #define VIA_CR80_FIRST_CODEC 0
213 #define VIA_CR80_SECOND_CODEC (1 << 30)
214 #define VIA_CR80_FIRST_CODEC_VALID (1 << 25)
215 #define VIA_CR80_VALID (1 << 25)
216 #define VIA_CR80_SECOND_CODEC_VALID (1 << 27)
217 #define VIA_CR80_BUSY (1 << 24)
218 #define VIA_CR83_BUSY (1)
219 #define VIA_CR83_FIRST_CODEC_VALID (1 << 1)
220 #define VIA_CR80_READ (1 << 23)
221 #define VIA_CR80_WRITE_MODE 0
222 #define VIA_CR80_REG_IDX(idx) ((((idx) & 0xFF) >> 1) << 16)
223
224 /* capabilities we announce */
225 #ifdef VIA_SUPPORT_MMAP
226 #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | DSP_CAP_MMAP | \
227 DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
228 #else
229 #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | \
230 DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
231 #endif
232
233 /* scatter-gather DMA table entry, exactly as passed to hardware */
234 struct via_sgd_table {
235 u32 addr;
236 u32 count; /* includes additional VIA_xxx bits also */
237 };
238
239 #define VIA_EOL (1 << 31)
240 #define VIA_FLAG (1 << 30)
241 #define VIA_STOP (1 << 29)
242
243
244 enum via_channel_states {
245 sgd_stopped = 0,
246 sgd_in_progress = 1,
247 };
248
249
250 struct via_buffer_pgtbl {
251 dma_addr_t handle;
252 void *cpuaddr;
253 };
254
255
256 struct via_channel {
257 atomic_t n_frags;
258 atomic_t hw_ptr;
259 wait_queue_head_t wait;
260
261 unsigned int sw_ptr;
262 unsigned int slop_len;
263 unsigned int n_irqs;
264 int bytes;
265
266 unsigned is_active : 1;
267 unsigned is_record : 1;
268 unsigned is_mapped : 1;
269 unsigned is_enabled : 1;
270 unsigned is_multi: 1; /* 8233 6 channel */
271 u8 pcm_fmt; /* VIA_PCM_FMT_xxx */
272 u8 channels; /* Channel count */
273
274 unsigned rate; /* sample rate */
275 unsigned int frag_size;
276 unsigned int frag_number;
277
278 unsigned char intmask;
279
280 volatile struct via_sgd_table *sgtable;
281 dma_addr_t sgt_handle;
282
283 unsigned int page_number;
284 struct via_buffer_pgtbl pgtbl[VIA_MAX_BUFFER_DMA_PAGES];
285
286 long iobase;
287
288 const char *name;
289 };
290
291
292 /* data stored for each chip */
293 struct via_info {
294 struct pci_dev *pdev;
295 long baseaddr;
296
297 struct ac97_codec *ac97;
298 spinlock_t ac97_lock;
299 spinlock_t lock;
300 int card_num; /* unique card number, from 0 */
301
302 int dev_dsp; /* /dev/dsp index from register_sound_dsp() */
303
304 unsigned rev_h : 1;
305 unsigned legacy: 1; /* Has legacy ports */
306 unsigned intmask: 1; /* Needs int bits */
307 unsigned sixchannel: 1; /* 8233/35 with 6 channel support */
308 unsigned volume: 1;
309
310 int locked_rate : 1;
311
312 int mixer_vol; /* 8233/35 volume - not yet implemented */
313
314 struct semaphore syscall_sem;
315 struct semaphore open_sem;
316
317 /* The 8233/8235 have 4 DX audio channels, two record and
318 one six channel out. We bind ch_in to DX 1, ch_out to multichannel
319 and ch_fm to DX 2. DX 3 and REC0/REC1 are unused at the
320 moment */
321
322 struct via_channel ch_in;
323 struct via_channel ch_out;
324 struct via_channel ch_fm;
325
326 #ifdef CONFIG_MIDI_VIA82CXXX
327 void *midi_devc;
328 struct address_info midi_info;
329 #endif
330 };
331
332
333 /* number of cards, used for assigning unique numbers to cards */
334 static unsigned via_num_cards;
335
336
337
338 /****************************************************************
339 *
340 * prototypes
341 *
342 *
343 */
344
345 static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id);
346 static void __devexit via_remove_one (struct pci_dev *pdev);
347
348 static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos);
349 static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos);
350 static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait);
351 static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
352 static int via_dsp_open (struct inode *inode, struct file *file);
353 static int via_dsp_release(struct inode *inode, struct file *file);
354 static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma);
355
356 static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg);
357 static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value);
358 static u8 via_ac97_wait_idle (struct via_info *card);
359
360 static void via_chan_free (struct via_info *card, struct via_channel *chan);
361 static void via_chan_clear (struct via_info *card, struct via_channel *chan);
362 static void via_chan_pcm_fmt (struct via_channel *chan, int reset);
363 static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan);
364
365
366 /****************************************************************
367 *
368 * Various data the driver needs
369 *
370 *
371 */
372
373
374 static struct pci_device_id via_pci_tbl[] = {
375 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
376 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
377 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_5,
378 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
379 { 0, }
380 };
381 MODULE_DEVICE_TABLE(pci,via_pci_tbl);
382
383
384 static struct pci_driver via_driver = {
385 .name = VIA_MODULE_NAME,
386 .id_table = via_pci_tbl,
387 .probe = via_init_one,
388 .remove = __devexit_p(via_remove_one),
389 };
390
391
392 /****************************************************************
393 *
394 * Low-level base 0 register read/write helpers
395 *
396 *
397 */
398
399 /**
400 * via_chan_stop - Terminate DMA on specified PCM channel
401 * @iobase: PCI base address for SGD channel registers
402 *
403 * Terminate scatter-gather DMA operation for given
404 * channel (derived from @iobase), if DMA is active.
405 *
406 * Note that @iobase is not the PCI base address,
407 * but the PCI base address plus an offset to
408 * one of three PCM channels supported by the chip.
409 *
410 */
411
412 static inline void via_chan_stop (long iobase)
413 {
414 if (inb (iobase + VIA_PCM_STATUS) & VIA_SGD_ACTIVE)
415 outb (VIA_SGD_TERMINATE, iobase + VIA_PCM_CONTROL);
416 }
417
418
419 /**
420 * via_chan_status_clear - Clear status flags on specified DMA channel
421 * @iobase: PCI base address for SGD channel registers
422 *
423 * Clear any pending status flags for the given
424 * DMA channel (derived from @iobase), if any
425 * flags are asserted.
426 *
427 * Note that @iobase is not the PCI base address,
428 * but the PCI base address plus an offset to
429 * one of three PCM channels supported by the chip.
430 *
431 */
432
433 static inline void via_chan_status_clear (long iobase)
434 {
435 u8 tmp = inb (iobase + VIA_PCM_STATUS);
436
437 if (tmp != 0)
438 outb (tmp, iobase + VIA_PCM_STATUS);
439 }
440
441
442 /**
443 * sg_begin - Begin recording or playback on a PCM channel
444 * @chan: Channel for which DMA operation shall begin
445 *
446 * Start scatter-gather DMA for the given channel.
447 *
448 */
449
450 static inline void sg_begin (struct via_channel *chan)
451 {
452 DPRINTK("Start with intmask %d\n", chan->intmask);
453 DPRINTK("About to start from %d to %d\n",
454 inl(chan->iobase + VIA_PCM_BLOCK_COUNT),
455 inb(chan->iobase + VIA_PCM_STOPRATE + 3));
456 outb (VIA_SGD_START|chan->intmask, chan->iobase + VIA_PCM_CONTROL);
457 DPRINTK("Status is now %02X\n", inb(chan->iobase + VIA_PCM_STATUS));
458 DPRINTK("Control is now %02X\n", inb(chan->iobase + VIA_PCM_CONTROL));
459 }
460
461
462 static int sg_active (long iobase)
463 {
464 u8 tmp = inb (iobase + VIA_PCM_STATUS);
465 if ((tmp & VIA_SGD_STOPPED) || (tmp & VIA_SGD_PAUSED)) {
466 printk(KERN_WARNING "via82cxxx warning: SG stopped or paused\n");
467 return 0;
468 }
469 if (tmp & VIA_SGD_ACTIVE)
470 return 1;
471 return 0;
472 }
473
474 static int via_sg_offset(struct via_channel *chan)
475 {
476 return inl (chan->iobase + VIA_PCM_BLOCK_COUNT) & 0x00FFFFFF;
477 }
478
479 /****************************************************************
480 *
481 * Miscellaneous debris
482 *
483 *
484 */
485
486
487 /**
488 * via_syscall_down - down the card-specific syscell semaphore
489 * @card: Private info for specified board
490 * @nonblock: boolean, non-zero if O_NONBLOCK is set
491 *
492 * Encapsulates standard method of acquiring the syscall sem.
493 *
494 * Returns negative errno on error, or zero for success.
495 */
496
497 static inline int via_syscall_down (struct via_info *card, int nonblock)
498 {
499 /* Thomas Sailer:
500 * EAGAIN is supposed to be used if IO is pending,
501 * not if there is contention on some internal
502 * synchronization primitive which should be
503 * held only for a short time anyway
504 */
505 nonblock = 0;
506
507 if (nonblock) {
508 if (down_trylock (&card->syscall_sem))
509 return -EAGAIN;
510 } else {
511 if (down_interruptible (&card->syscall_sem))
512 return -ERESTARTSYS;
513 }
514
515 return 0;
516 }
517
518
519 /**
520 * via_stop_everything - Stop all audio operations
521 * @card: Private info for specified board
522 *
523 * Stops all DMA operations and interrupts, and clear
524 * any pending status bits resulting from those operations.
525 */
526
527 static void via_stop_everything (struct via_info *card)
528 {
529 u8 tmp, new_tmp;
530
531 DPRINTK ("ENTER\n");
532
533 assert (card != NULL);
534
535 /*
536 * terminate any existing operations on audio read/write channels
537 */
538 via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
539 via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
540 via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
541 if(card->sixchannel)
542 via_chan_stop (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
543
544 /*
545 * clear any existing stops / flags (sanity check mainly)
546 */
547 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
548 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
549 via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
550 if(card->sixchannel)
551 via_chan_status_clear (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
552
553 /*
554 * clear any enabled interrupt bits
555 */
556 tmp = inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
557 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
558 if (tmp != new_tmp)
559 outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
560
561 tmp = inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
562 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
563 if (tmp != new_tmp)
564 outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
565
566 tmp = inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
567 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
568 if (tmp != new_tmp)
569 outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
570
571 if(card->sixchannel)
572 {
573 tmp = inb (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
574 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
575 if (tmp != new_tmp)
576 outb (0, card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
577 }
578
579 udelay(10);
580
581 /*
582 * clear any existing flags
583 */
584 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
585 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
586 via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
587
588 DPRINTK ("EXIT\n");
589 }
590
591
592 /**
593 * via_set_rate - Set PCM rate for given channel
594 * @ac97: Pointer to generic codec info struct
595 * @chan: Private info for specified channel
596 * @rate: Desired PCM sample rate, in Khz
597 *
598 * Sets the PCM sample rate for a channel.
599 *
600 * Values for @rate are clamped to a range of 4000 Khz through 48000 Khz,
601 * due to hardware constraints.
602 */
603
604 static int via_set_rate (struct ac97_codec *ac97,
605 struct via_channel *chan, unsigned rate)
606 {
607 struct via_info *card = ac97->private_data;
608 int rate_reg;
609 u32 dacp;
610 u32 mast_vol, phone_vol, mono_vol, pcm_vol;
611 u32 mute_vol = 0x8000; /* The mute volume? -- Seems to work! */
612
613 DPRINTK ("ENTER, rate = %d\n", rate);
614
615 if (chan->rate == rate)
616 goto out;
617 if (card->locked_rate) {
618 chan->rate = 48000;
619 goto out;
620 }
621
622 if (rate > 48000) rate = 48000;
623 if (rate < 4000) rate = 4000;
624
625 rate_reg = chan->is_record ? AC97_PCM_LR_ADC_RATE :
626 AC97_PCM_FRONT_DAC_RATE;
627
628 /* Save current state */
629 dacp=via_ac97_read_reg(ac97, AC97_POWER_CONTROL);
630 mast_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_STEREO);
631 mono_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_MONO);
632 phone_vol = via_ac97_read_reg(ac97, AC97_HEADPHONE_VOL);
633 pcm_vol = via_ac97_read_reg(ac97, AC97_PCMOUT_VOL);
634 /* Mute - largely reduces popping */
635 via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mute_vol);
636 via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mute_vol);
637 via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, mute_vol);
638 via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, mute_vol);
639 /* Power down the DAC */
640 via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp|0x0200);
641
642 /* Set new rate */
643 via_ac97_write_reg (ac97, rate_reg, rate);
644
645 /* Power DAC back up */
646 via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp);
647 udelay (200); /* reduces popping */
648
649 /* Restore volumes */
650 via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mast_vol);
651 via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mono_vol);
652 via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, phone_vol);
653 via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, pcm_vol);
654
655 /* the hardware might return a value different than what we
656 * passed to it, so read the rate value back from hardware
657 * to see what we came up with
658 */
659 chan->rate = via_ac97_read_reg (ac97, rate_reg);
660
661 if (chan->rate == 0) {
662 card->locked_rate = 1;
663 chan->rate = 48000;
664 printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
665 }
666
667 out:
668 DPRINTK ("EXIT, returning rate %d Hz\n", chan->rate);
669 return chan->rate;
670 }
671
672
673 /****************************************************************
674 *
675 * Channel-specific operations
676 *
677 *
678 */
679
680
681 /**
682 * via_chan_init_defaults - Initialize a struct via_channel
683 * @card: Private audio chip info
684 * @chan: Channel to be initialized
685 *
686 * Zero @chan, and then set all static defaults for the structure.
687 */
688
689 static void via_chan_init_defaults (struct via_info *card, struct via_channel *chan)
690 {
691 memset (chan, 0, sizeof (*chan));
692
693 if(card->intmask)
694 chan->intmask = 0x23; /* Turn on the IRQ bits */
695
696 if (chan == &card->ch_out) {
697 chan->name = "PCM-OUT";
698 if(card->sixchannel)
699 {
700 chan->iobase = card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN;
701 chan->is_multi = 1;
702 DPRINTK("Using multichannel for pcm out\n");
703 }
704 else
705 chan->iobase = card->baseaddr + VIA_BASE0_PCM_OUT_CHAN;
706 } else if (chan == &card->ch_in) {
707 chan->name = "PCM-IN";
708 chan->iobase = card->baseaddr + VIA_BASE0_PCM_IN_CHAN;
709 chan->is_record = 1;
710 } else if (chan == &card->ch_fm) {
711 chan->name = "PCM-OUT-FM";
712 chan->iobase = card->baseaddr + VIA_BASE0_FM_OUT_CHAN;
713 } else {
714 BUG();
715 }
716
717 init_waitqueue_head (&chan->wait);
718
719 chan->pcm_fmt = VIA_PCM_FMT_MASK;
720 chan->is_enabled = 1;
721
722 chan->frag_number = 0;
723 chan->frag_size = 0;
724 atomic_set(&chan->n_frags, 0);
725 atomic_set (&chan->hw_ptr, 0);
726 }
727
728 /**
729 * via_chan_init - Initialize PCM channel
730 * @card: Private audio chip info
731 * @chan: Channel to be initialized
732 *
733 * Performs some of the preparations necessary to begin
734 * using a PCM channel.
735 *
736 * Currently the preparations consist of
737 * setting the PCM channel to a known state.
738 */
739
740
741 static void via_chan_init (struct via_info *card, struct via_channel *chan)
742 {
743
744 DPRINTK ("ENTER\n");
745
746 /* bzero channel structure, and init members to defaults */
747 via_chan_init_defaults (card, chan);
748
749 /* stop any existing channel output */
750 via_chan_clear (card, chan);
751 via_chan_status_clear (chan->iobase);
752 via_chan_pcm_fmt (chan, 1);
753
754 DPRINTK ("EXIT\n");
755 }
756
757 /**
758 * via_chan_buffer_init - Initialize PCM channel buffer
759 * @card: Private audio chip info
760 * @chan: Channel to be initialized
761 *
762 * Performs some of the preparations necessary to begin
763 * using a PCM channel.
764 *
765 * Currently the preparations include allocating the
766 * scatter-gather DMA table and buffers,
767 * and passing the
768 * address of the DMA table to the hardware.
769 *
770 * Note that special care is taken when passing the
771 * DMA table address to hardware, because it was found
772 * during driver development that the hardware did not
773 * always "take" the address.
774 */
775
776 static int via_chan_buffer_init (struct via_info *card, struct via_channel *chan)
777 {
778 int page, offset;
779 int i;
780
781 DPRINTK ("ENTER\n");
782
783
784 chan->intmask = 0;
785 if(card->intmask)
786 chan->intmask = 0x23; /* Turn on the IRQ bits */
787
788 if (chan->sgtable != NULL) {
789 DPRINTK ("EXIT\n");
790 return 0;
791 }
792
793 /* alloc DMA-able memory for scatter-gather table */
794 chan->sgtable = pci_alloc_consistent (card->pdev,
795 (sizeof (struct via_sgd_table) * chan->frag_number),
796 &chan->sgt_handle);
797 if (!chan->sgtable) {
798 printk (KERN_ERR PFX "DMA table alloc fail, aborting\n");
799 DPRINTK ("EXIT\n");
800 return -ENOMEM;
801 }
802
803 memset ((void*)chan->sgtable, 0,
804 (sizeof (struct via_sgd_table) * chan->frag_number));
805
806 /* alloc DMA-able memory for scatter-gather buffers */
807
808 chan->page_number = (chan->frag_number * chan->frag_size) / PAGE_SIZE +
809 (((chan->frag_number * chan->frag_size) % PAGE_SIZE) ? 1 : 0);
810
811 for (i = 0; i < chan->page_number; i++) {
812 chan->pgtbl[i].cpuaddr = pci_alloc_consistent (card->pdev, PAGE_SIZE,
813 &chan->pgtbl[i].handle);
814
815 if (!chan->pgtbl[i].cpuaddr) {
816 chan->page_number = i;
817 goto err_out_nomem;
818 }
819
820 #ifndef VIA_NDEBUG
821 memset (chan->pgtbl[i].cpuaddr, 0xBC, chan->frag_size);
822 #endif
823
824 #if 1
825 DPRINTK ("dmabuf_pg #%d (h=%lx, v2p=%lx, a=%p)\n",
826 i, (long)chan->pgtbl[i].handle,
827 virt_to_phys(chan->pgtbl[i].cpuaddr),
828 chan->pgtbl[i].cpuaddr);
829 #endif
830 }
831
832 for (i = 0; i < chan->frag_number; i++) {
833
834 page = i / (PAGE_SIZE / chan->frag_size);
835 offset = (i % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
836
837 chan->sgtable[i].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
838 chan->sgtable[i].addr = cpu_to_le32 (chan->pgtbl[page].handle + offset);
839
840 #if 1
841 DPRINTK ("dmabuf #%d (32(h)=%lx)\n",
842 i,
843 (long)chan->sgtable[i].addr);
844 #endif
845 }
846
847 /* overwrite the last buffer information */
848 chan->sgtable[chan->frag_number - 1].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
849
850 /* set location of DMA-able scatter-gather info table */
851 DPRINTK ("outl (0x%X, 0x%04lX)\n",
852 chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
853
854 via_ac97_wait_idle (card);
855 outl (chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
856 udelay (20);
857 via_ac97_wait_idle (card);
858 /* load no rate adaption, stereo 16bit, set up ring slots */
859 if(card->sixchannel)
860 {
861 if(!chan->is_multi)
862 {
863 outl (0xFFFFF | (0x3 << 20) | (chan->frag_number << 24), chan->iobase + VIA_PCM_STOPRATE);
864 udelay (20);
865 via_ac97_wait_idle (card);
866 }
867 }
868
869 DPRINTK ("inl (0x%lX) = %x\n",
870 chan->iobase + VIA_PCM_TABLE_ADDR,
871 inl(chan->iobase + VIA_PCM_TABLE_ADDR));
872
873 DPRINTK ("EXIT\n");
874 return 0;
875
876 err_out_nomem:
877 printk (KERN_ERR PFX "DMA buffer alloc fail, aborting\n");
878 via_chan_buffer_free (card, chan);
879 DPRINTK ("EXIT\n");
880 return -ENOMEM;
881 }
882
883
884 /**
885 * via_chan_free - Release a PCM channel
886 * @card: Private audio chip info
887 * @chan: Channel to be released
888 *
889 * Performs all the functions necessary to clean up
890 * an initialized channel.
891 *
892 * Currently these functions include disabled any
893 * active DMA operations, setting the PCM channel
894 * back to a known state, and releasing any allocated
895 * sound buffers.
896 */
897
898 static void via_chan_free (struct via_info *card, struct via_channel *chan)
899 {
900 DPRINTK ("ENTER\n");
901
902 spin_lock_irq (&card->lock);
903
904 /* stop any existing channel output */
905 via_chan_status_clear (chan->iobase);
906 via_chan_stop (chan->iobase);
907 via_chan_status_clear (chan->iobase);
908
909 spin_unlock_irq (&card->lock);
910
911 synchronize_irq(card->pdev->irq);
912
913 DPRINTK ("EXIT\n");
914 }
915
916 static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan)
917 {
918 int i;
919
920 DPRINTK ("ENTER\n");
921
922 /* zero location of DMA-able scatter-gather info table */
923 via_ac97_wait_idle(card);
924 outl (0, chan->iobase + VIA_PCM_TABLE_ADDR);
925
926 for (i = 0; i < chan->page_number; i++)
927 if (chan->pgtbl[i].cpuaddr) {
928 pci_free_consistent (card->pdev, PAGE_SIZE,
929 chan->pgtbl[i].cpuaddr,
930 chan->pgtbl[i].handle);
931 chan->pgtbl[i].cpuaddr = NULL;
932 chan->pgtbl[i].handle = 0;
933 }
934
935 chan->page_number = 0;
936
937 if (chan->sgtable) {
938 pci_free_consistent (card->pdev,
939 (sizeof (struct via_sgd_table) * chan->frag_number),
940 (void*)chan->sgtable, chan->sgt_handle);
941 chan->sgtable = NULL;
942 }
943
944 DPRINTK ("EXIT\n");
945 }
946
947
948 /**
949 * via_chan_pcm_fmt - Update PCM channel settings
950 * @chan: Channel to be updated
951 * @reset: Boolean. If non-zero, channel will be reset
952 * to 8-bit mono mode.
953 *
954 * Stores the settings of the current PCM format,
955 * 8-bit or 16-bit, and mono/stereo, into the
956 * hardware settings for the specified channel.
957 * If @reset is non-zero, the channel is reset
958 * to 8-bit mono mode. Otherwise, the channel
959 * is set to the values stored in the channel
960 * information struct @chan.
961 */
962
963 static void via_chan_pcm_fmt (struct via_channel *chan, int reset)
964 {
965 DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n",
966 chan->pcm_fmt, reset ? "yes" : "no");
967
968 assert (chan != NULL);
969
970 if (reset)
971 {
972 /* reset to 8-bit mono mode */
973 chan->pcm_fmt = 0;
974 chan->channels = 1;
975 }
976
977 /* enable interrupts on FLAG and EOL */
978 chan->pcm_fmt |= VIA_CHAN_TYPE_MASK;
979
980 /* if we are recording, enable recording fifo bit */
981 if (chan->is_record)
982 chan->pcm_fmt |= VIA_PCM_REC_FIFO;
983 /* set interrupt select bits where applicable (PCM in & out channels) */
984 if (!chan->is_record)
985 chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT;
986
987 DPRINTK("SET FMT - %02x %02x\n", chan->intmask , chan->is_multi);
988
989 if(chan->intmask)
990 {
991 u32 m;
992
993 /*
994 * Channel 0x4 is up to 6 x 16bit and has to be
995 * programmed differently
996 */
997
998 if(chan->is_multi)
999 {
1000 u8 c = 0;
1001
1002 /*
1003 * Load the type bit for num channels
1004 * and 8/16bit
1005 */
1006
1007 if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
1008 c = 1 << 7;
1009 if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
1010 c |= (2<<4);
1011 else
1012 c |= (1<<4);
1013
1014 outb(c, chan->iobase + VIA_PCM_TYPE);
1015
1016 /*
1017 * Set the channel steering
1018 * Mono
1019 * Channel 0 to slot 3
1020 * Channel 0 to slot 4
1021 * Stereo
1022 * Channel 0 to slot 3
1023 * Channel 1 to slot 4
1024 */
1025
1026 switch(chan->channels)
1027 {
1028 case 1:
1029 outl(0xFF000000 | (1<<0) | (1<<4) , chan->iobase + VIA_PCM_STOPRATE);
1030 break;
1031 case 2:
1032 outl(0xFF000000 | (1<<0) | (2<<4) , chan->iobase + VIA_PCM_STOPRATE);
1033 break;
1034 case 4:
1035 outl(0xFF000000 | (1<<0) | (2<<4) | (3<<8) | (4<<12), chan->iobase + VIA_PCM_STOPRATE);
1036 break;
1037 case 6:
1038 outl(0xFF000000 | (1<<0) | (2<<4) | (5<<8) | (6<<12) | (3<<16) | (4<<20), chan->iobase + VIA_PCM_STOPRATE);
1039 break;
1040 }
1041 }
1042 else
1043 {
1044 /*
1045 * New style, turn off channel volume
1046 * control, set bits in the right register
1047 */
1048 outb(0x0, chan->iobase + VIA_PCM_LEFTVOL);
1049 outb(0x0, chan->iobase + VIA_PCM_RIGHTVOL);
1050
1051 m = inl(chan->iobase + VIA_PCM_STOPRATE);
1052 m &= ~(3<<20);
1053 if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
1054 m |= (1 << 20);
1055 if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
1056 m |= (1 << 21);
1057 outl(m, chan->iobase + VIA_PCM_STOPRATE);
1058 }
1059 }
1060 else
1061 outb (chan->pcm_fmt, chan->iobase + VIA_PCM_TYPE);
1062
1063
1064 DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n",
1065 chan->pcm_fmt,
1066 inb (chan->iobase + VIA_PCM_TYPE));
1067 }
1068
1069
1070 /**
1071 * via_chan_clear - Stop DMA channel operation, and reset pointers
1072 * @card: the chip to accessed
1073 * @chan: Channel to be cleared
1074 *
1075 * Call via_chan_stop to halt DMA operations, and then resets
1076 * all software pointers which track DMA operation.
1077 */
1078
1079 static void via_chan_clear (struct via_info *card, struct via_channel *chan)
1080 {
1081 DPRINTK ("ENTER\n");
1082 via_chan_stop (chan->iobase);
1083 via_chan_buffer_free(card, chan);
1084 chan->is_active = 0;
1085 chan->is_mapped = 0;
1086 chan->is_enabled = 1;
1087 chan->slop_len = 0;
1088 chan->sw_ptr = 0;
1089 chan->n_irqs = 0;
1090 atomic_set (&chan->hw_ptr, 0);
1091 DPRINTK ("EXIT\n");
1092 }
1093
1094
1095 /**
1096 * via_chan_set_speed - Set PCM sample rate for given channel
1097 * @card: Private info for specified board
1098 * @chan: Channel whose sample rate will be adjusted
1099 * @val: New sample rate, in Khz
1100 *
1101 * Helper function for the %SNDCTL_DSP_SPEED ioctl. OSS semantics
1102 * demand that all audio operations halt (if they are not already
1103 * halted) when the %SNDCTL_DSP_SPEED is given.
1104 *
1105 * This function halts all audio operations for the given channel
1106 * @chan, and then calls via_set_rate to set the audio hardware
1107 * to the new rate.
1108 */
1109
1110 static int via_chan_set_speed (struct via_info *card,
1111 struct via_channel *chan, int val)
1112 {
1113 DPRINTK ("ENTER, requested rate = %d\n", val);
1114
1115 via_chan_clear (card, chan);
1116
1117 val = via_set_rate (card->ac97, chan, val);
1118
1119 DPRINTK ("EXIT, returning %d\n", val);
1120 return val;
1121 }
1122
1123
1124 /**
1125 * via_chan_set_fmt - Set PCM sample size for given channel
1126 * @card: Private info for specified board
1127 * @chan: Channel whose sample size will be adjusted
1128 * @val: New sample size, use the %AFMT_xxx constants
1129 *
1130 * Helper function for the %SNDCTL_DSP_SETFMT ioctl. OSS semantics
1131 * demand that all audio operations halt (if they are not already
1132 * halted) when the %SNDCTL_DSP_SETFMT is given.
1133 *
1134 * This function halts all audio operations for the given channel
1135 * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
1136 * to the new sample size, either 8-bit or 16-bit.
1137 */
1138
1139 static int via_chan_set_fmt (struct via_info *card,
1140 struct via_channel *chan, int val)
1141 {
1142 DPRINTK ("ENTER, val=%s\n",
1143 val == AFMT_U8 ? "AFMT_U8" :
1144 val == AFMT_S16_LE ? "AFMT_S16_LE" :
1145 "unknown");
1146
1147 via_chan_clear (card, chan);
1148
1149 assert (val != AFMT_QUERY); /* this case is handled elsewhere */
1150
1151 switch (val) {
1152 case AFMT_S16_LE:
1153 if ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) == 0) {
1154 chan->pcm_fmt |= VIA_PCM_FMT_16BIT;
1155 via_chan_pcm_fmt (chan, 0);
1156 }
1157 break;
1158
1159 case AFMT_U8:
1160 if (chan->pcm_fmt & VIA_PCM_FMT_16BIT) {
1161 chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT;
1162 via_chan_pcm_fmt (chan, 0);
1163 }
1164 break;
1165
1166 default:
1167 DPRINTK ("unknown AFMT: 0x%X\n", val);
1168 val = AFMT_S16_LE;
1169 }
1170
1171 DPRINTK ("EXIT\n");
1172 return val;
1173 }
1174
1175
1176 /**
1177 * via_chan_set_stereo - Enable or disable stereo for a DMA channel
1178 * @card: Private info for specified board
1179 * @chan: Channel whose stereo setting will be adjusted
1180 * @val: New sample size, use the %AFMT_xxx constants
1181 *
1182 * Helper function for the %SNDCTL_DSP_CHANNELS and %SNDCTL_DSP_STEREO ioctls. OSS semantics
1183 * demand that all audio operations halt (if they are not already
1184 * halted) when %SNDCTL_DSP_CHANNELS or SNDCTL_DSP_STEREO is given.
1185 *
1186 * This function halts all audio operations for the given channel
1187 * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
1188 * to enable or disable stereo.
1189 */
1190
1191 static int via_chan_set_stereo (struct via_info *card,
1192 struct via_channel *chan, int val)
1193 {
1194 DPRINTK ("ENTER, channels = %d\n", val);
1195
1196 via_chan_clear (card, chan);
1197
1198 switch (val) {
1199
1200 /* mono */
1201 case 1:
1202 chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO;
1203 chan->channels = 1;
1204 via_chan_pcm_fmt (chan, 0);
1205 break;
1206
1207 /* stereo */
1208 case 2:
1209 chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
1210 chan->channels = 2;
1211 via_chan_pcm_fmt (chan, 0);
1212 break;
1213
1214 case 4:
1215 case 6:
1216 if(chan->is_multi)
1217 {
1218 chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
1219 chan->channels = val;
1220 break;
1221 }
1222 /* unknown */
1223 default:
1224 val = -EINVAL;
1225 break;
1226 }
1227
1228 DPRINTK ("EXIT, returning %d\n", val);
1229 return val;
1230 }
1231
1232 static int via_chan_set_buffering (struct via_info *card,
1233 struct via_channel *chan, int val)
1234 {
1235 int shift;
1236
1237 DPRINTK ("ENTER\n");
1238
1239 /* in both cases the buffer cannot be changed */
1240 if (chan->is_active || chan->is_mapped) {
1241 DPRINTK ("EXIT\n");
1242 return -EINVAL;
1243 }
1244
1245 /* called outside SETFRAGMENT */
1246 /* set defaults or do nothing */
1247 if (val < 0) {
1248
1249 if (chan->frag_size && chan->frag_number)
1250 goto out;
1251
1252 DPRINTK ("\n");
1253
1254 chan->frag_size = (VIA_DEFAULT_FRAG_TIME * chan->rate * chan->channels
1255 * ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) ? 2 : 1)) / 1000 - 1;
1256
1257 shift = 0;
1258 while (chan->frag_size) {
1259 chan->frag_size >>= 1;
1260 shift++;
1261 }
1262 chan->frag_size = 1 << shift;
1263
1264 chan->frag_number = (VIA_DEFAULT_BUFFER_TIME / VIA_DEFAULT_FRAG_TIME);
1265
1266 DPRINTK ("setting default values %d %d\n", chan->frag_size, chan->frag_number);
1267 } else {
1268 chan->frag_size = 1 << (val & 0xFFFF);
1269 chan->frag_number = (val >> 16) & 0xFFFF;
1270
1271 DPRINTK ("using user values %d %d\n", chan->frag_size, chan->frag_number);
1272 }
1273
1274 /* quake3 wants frag_number to be a power of two */
1275 shift = 0;
1276 while (chan->frag_number) {
1277 chan->frag_number >>= 1;
1278 shift++;
1279 }
1280 chan->frag_number = 1 << shift;
1281
1282 if (chan->frag_size > VIA_MAX_FRAG_SIZE)
1283 chan->frag_size = VIA_MAX_FRAG_SIZE;
1284 else if (chan->frag_size < VIA_MIN_FRAG_SIZE)
1285 chan->frag_size = VIA_MIN_FRAG_SIZE;
1286
1287 if (chan->frag_number < VIA_MIN_FRAG_NUMBER)
1288 chan->frag_number = VIA_MIN_FRAG_NUMBER;
1289 if (chan->frag_number > VIA_MAX_FRAG_NUMBER)
1290 chan->frag_number = VIA_MAX_FRAG_NUMBER;
1291
1292 if ((chan->frag_number * chan->frag_size) / PAGE_SIZE > VIA_MAX_BUFFER_DMA_PAGES)
1293 chan->frag_number = (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE) / chan->frag_size;
1294
1295 out:
1296 if (chan->is_record)
1297 atomic_set (&chan->n_frags, 0);
1298 else
1299 atomic_set (&chan->n_frags, chan->frag_number);
1300
1301 DPRINTK ("EXIT\n");
1302
1303 return 0;
1304 }
1305
1306 #ifdef VIA_CHAN_DUMP_BUFS
1307 /**
1308 * via_chan_dump_bufs - Display DMA table contents
1309 * @chan: Channel whose DMA table will be displayed
1310 *
1311 * Debugging function which displays the contents of the
1312 * scatter-gather DMA table for the given channel @chan.
1313 */
1314
1315 static void via_chan_dump_bufs (struct via_channel *chan)
1316 {
1317 int i;
1318
1319 for (i = 0; i < chan->frag_number; i++) {
1320 DPRINTK ("#%02d: addr=%x, count=%u, flag=%d, eol=%d\n",
1321 i, chan->sgtable[i].addr,
1322 chan->sgtable[i].count & 0x00FFFFFF,
1323 chan->sgtable[i].count & VIA_FLAG ? 1 : 0,
1324 chan->sgtable[i].count & VIA_EOL ? 1 : 0);
1325 }
1326 DPRINTK ("buf_in_use = %d, nextbuf = %d\n",
1327 atomic_read (&chan->buf_in_use),
1328 atomic_read (&chan->sw_ptr));
1329 }
1330 #endif /* VIA_CHAN_DUMP_BUFS */
1331
1332
1333 /**
1334 * via_chan_flush_frag - Flush partially-full playback buffer to hardware
1335 * @chan: Channel whose DMA table will be flushed
1336 *
1337 * Flushes partially-full playback buffer to hardware.
1338 */
1339
1340 static void via_chan_flush_frag (struct via_channel *chan)
1341 {
1342 DPRINTK ("ENTER\n");
1343
1344 assert (chan->slop_len > 0);
1345
1346 if (chan->sw_ptr == (chan->frag_number - 1))
1347 chan->sw_ptr = 0;
1348 else
1349 chan->sw_ptr++;
1350
1351 chan->slop_len = 0;
1352
1353 assert (atomic_read (&chan->n_frags) > 0);
1354 atomic_dec (&chan->n_frags);
1355
1356 DPRINTK ("EXIT\n");
1357 }
1358
1359
1360
1361 /**
1362 * via_chan_maybe_start - Initiate audio hardware DMA operation
1363 * @chan: Channel whose DMA is to be started
1364 *
1365 * Initiate DMA operation, if the DMA engine for the given
1366 * channel @chan is not already active.
1367 */
1368
1369 static inline void via_chan_maybe_start (struct via_channel *chan)
1370 {
1371 assert (chan->is_active == sg_active(chan->iobase));
1372
1373 DPRINTK ("MAYBE START %s\n", chan->name);
1374 if (!chan->is_active && chan->is_enabled) {
1375 chan->is_active = 1;
1376 sg_begin (chan);
1377 DPRINTK ("starting channel %s\n", chan->name);
1378 }
1379 }
1380
1381
1382 /****************************************************************
1383 *
1384 * Interface to ac97-codec module
1385 *
1386 *
1387 */
1388
1389 /**
1390 * via_ac97_wait_idle - Wait until AC97 codec is not busy
1391 * @card: Private info for specified board
1392 *
1393 * Sleep until the AC97 codec is no longer busy.
1394 * Returns the final value read from the SGD
1395 * register being polled.
1396 */
1397
1398 static u8 via_ac97_wait_idle (struct via_info *card)
1399 {
1400 u8 tmp8;
1401 int counter = VIA_COUNTER_LIMIT;
1402
1403 DPRINTK ("ENTER/EXIT\n");
1404
1405 assert (card != NULL);
1406 assert (card->pdev != NULL);
1407
1408 do {
1409 udelay (15);
1410
1411 tmp8 = inb (card->baseaddr + 0x83);
1412 } while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0));
1413
1414 if (tmp8 & VIA_CR83_BUSY)
1415 printk (KERN_WARNING PFX "timeout waiting on AC97 codec\n");
1416 return tmp8;
1417 }
1418
1419
1420 /**
1421 * via_ac97_read_reg - Read AC97 standard register
1422 * @codec: Pointer to generic AC97 codec info
1423 * @reg: Index of AC97 register to be read
1424 *
1425 * Read the value of a single AC97 codec register,
1426 * as defined by the Intel AC97 specification.
1427 *
1428 * Defines the standard AC97 read-register operation
1429 * required by the kernel's ac97_codec interface.
1430 *
1431 * Returns the 16-bit value stored in the specified
1432 * register.
1433 */
1434
1435 static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg)
1436 {
1437 unsigned long data;
1438 struct via_info *card;
1439 int counter;
1440
1441 DPRINTK ("ENTER\n");
1442
1443 assert (codec != NULL);
1444 assert (codec->private_data != NULL);
1445
1446 card = codec->private_data;
1447
1448 spin_lock(&card->ac97_lock);
1449
1450 /* Every time we write to register 80 we cause a transaction.
1451 The only safe way to clear the valid bit is to write it at
1452 the same time as the command */
1453 data = (reg << 16) | VIA_CR80_READ | VIA_CR80_VALID;
1454
1455 outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
1456 udelay (20);
1457
1458 for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
1459 udelay (1);
1460 if ((((data = inl(card->baseaddr + VIA_BASE0_AC97_CTRL)) &
1461 (VIA_CR80_VALID|VIA_CR80_BUSY)) == VIA_CR80_VALID))
1462 goto out;
1463 }
1464
1465 printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data);
1466 goto err_out;
1467
1468 out:
1469 /* Once the valid bit has become set, we must wait a complete AC97
1470 frame before the data has settled. */
1471 udelay(25);
1472 data = (unsigned long) inl (card->baseaddr + VIA_BASE0_AC97_CTRL);
1473
1474 outb (0x02, card->baseaddr + 0x83);
1475
1476 if (((data & 0x007F0000) >> 16) == reg) {
1477 DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n",
1478 data, data & 0x0000FFFF);
1479 spin_unlock(&card->ac97_lock);
1480 return data & 0x0000FFFF;
1481 }
1482
1483 printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n",
1484 reg, ((data & 0x007F0000) >> 16));
1485
1486 err_out:
1487 spin_unlock(&card->ac97_lock);
1488 DPRINTK ("EXIT, returning 0\n");
1489 return 0;
1490 }
1491
1492
1493 /**
1494 * via_ac97_write_reg - Write AC97 standard register
1495 * @codec: Pointer to generic AC97 codec info
1496 * @reg: Index of AC97 register to be written
1497 * @value: Value to be written to AC97 register
1498 *
1499 * Write the value of a single AC97 codec register,
1500 * as defined by the Intel AC97 specification.
1501 *
1502 * Defines the standard AC97 write-register operation
1503 * required by the kernel's ac97_codec interface.
1504 */
1505
1506 static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value)
1507 {
1508 u32 data;
1509 struct via_info *card;
1510 int counter;
1511
1512 DPRINTK ("ENTER\n");
1513
1514 assert (codec != NULL);
1515 assert (codec->private_data != NULL);
1516
1517 card = codec->private_data;
1518
1519 spin_lock(&card->ac97_lock);
1520
1521 data = (reg << 16) + value;
1522 outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
1523 udelay (10);
1524
1525 for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
1526 if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0)
1527 goto out;
1528
1529 udelay (15);
1530 }
1531
1532 printk (KERN_WARNING PFX "timeout after AC97 codec write (0x%X, 0x%X)\n", reg, value);
1533
1534 out:
1535 spin_unlock(&card->ac97_lock);
1536 DPRINTK ("EXIT\n");
1537 }
1538
1539
1540 static int via_mixer_open (struct inode *inode, struct file *file)
1541 {
1542 int minor = iminor(inode);
1543 struct via_info *card;
1544 struct pci_dev *pdev = NULL;
1545 struct pci_driver *drvr;
1546
1547 DPRINTK ("ENTER\n");
1548
1549 while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
1550 drvr = pci_dev_driver (pdev);
1551 if (drvr == &via_driver) {
1552 assert (pci_get_drvdata (pdev) != NULL);
1553
1554 card = pci_get_drvdata (pdev);
1555 if (card->ac97->dev_mixer == minor)
1556 goto match;
1557 }
1558 }
1559
1560 DPRINTK ("EXIT, returning -ENODEV\n");
1561 return -ENODEV;
1562
1563 match:
1564 file->private_data = card->ac97;
1565
1566 DPRINTK ("EXIT, returning 0\n");
1567 return nonseekable_open(inode, file);
1568 }
1569
1570 static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
1571 unsigned long arg)
1572 {
1573 struct ac97_codec *codec = file->private_data;
1574 struct via_info *card;
1575 int nonblock = (file->f_flags & O_NONBLOCK);
1576 int rc;
1577
1578 DPRINTK ("ENTER\n");
1579
1580 assert (codec != NULL);
1581 card = codec->private_data;
1582 assert (card != NULL);
1583
1584 rc = via_syscall_down (card, nonblock);
1585 if (rc) goto out;
1586
1587 #if 0
1588 /*
1589 * Intercept volume control on 8233 and 8235
1590 */
1591 if(card->volume)
1592 {
1593 switch(cmd)
1594 {
1595 case SOUND_MIXER_READ_VOLUME:
1596 return card->mixer_vol;
1597 case SOUND_MIXER_WRITE_VOLUME:
1598 {
1599 int v;
1600 if(get_user(v, (int *)arg))
1601 {
1602 rc = -EFAULT;
1603 goto out;
1604 }
1605 card->mixer_vol = v;
1606 }
1607 }
1608 }
1609 #endif
1610 rc = codec->mixer_ioctl(codec, cmd, arg);
1611
1612 up (&card->syscall_sem);
1613
1614 out:
1615 DPRINTK ("EXIT, returning %d\n", rc);
1616 return rc;
1617 }
1618
1619
1620 static struct file_operations via_mixer_fops = {
1621 .owner = THIS_MODULE,
1622 .open = via_mixer_open,
1623 .llseek = no_llseek,
1624 .ioctl = via_mixer_ioctl,
1625 };
1626
1627
1628 static int __devinit via_ac97_reset (struct via_info *card)
1629 {
1630 struct pci_dev *pdev = card->pdev;
1631 u8 tmp8;
1632 u16 tmp16;
1633
1634 DPRINTK ("ENTER\n");
1635
1636 assert (pdev != NULL);
1637
1638 #ifndef NDEBUG
1639 {
1640 u8 r40,r41,r42,r43,r44,r48;
1641 pci_read_config_byte (card->pdev, 0x40, &r40);
1642 pci_read_config_byte (card->pdev, 0x41, &r41);
1643 pci_read_config_byte (card->pdev, 0x42, &r42);
1644 pci_read_config_byte (card->pdev, 0x43, &r43);
1645 pci_read_config_byte (card->pdev, 0x44, &r44);
1646 pci_read_config_byte (card->pdev, 0x48, &r48);
1647 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
1648 r40,r41,r42,r43,r44,r48);
1649
1650 spin_lock_irq (&card->lock);
1651 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
1652 inb (card->baseaddr + 0x00),
1653 inb (card->baseaddr + 0x01),
1654 inb (card->baseaddr + 0x02),
1655 inl (card->baseaddr + 0x04),
1656 inl (card->baseaddr + 0x0C),
1657 inl (card->baseaddr + 0x80),
1658 inl (card->baseaddr + 0x84));
1659 spin_unlock_irq (&card->lock);
1660
1661 }
1662 #endif
1663
1664 /*
1665 * Reset AC97 controller: enable, disable, enable,
1666 * pausing after each command for good luck. Only
1667 * do this if the codec is not ready, because it causes
1668 * loud pops and such due to such a hard codec reset.
1669 */
1670 pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
1671 if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
1672 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1673 VIA_CR41_AC97_ENABLE |
1674 VIA_CR41_AC97_RESET |
1675 VIA_CR41_AC97_WAKEUP);
1676 udelay (100);
1677
1678 pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
1679 udelay (100);
1680
1681 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1682 VIA_CR41_AC97_ENABLE |
1683 VIA_CR41_PCM_ENABLE |
1684 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1685 udelay (100);
1686 }
1687
1688 /* Make sure VRA is enabled, in case we didn't do a
1689 * complete codec reset, above
1690 */
1691 pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
1692 if (((tmp8 & VIA_CR41_VRA) == 0) ||
1693 ((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
1694 ((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
1695 ((tmp8 & VIA_CR41_AC97_RESET) == 0)) {
1696 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1697 VIA_CR41_AC97_ENABLE |
1698 VIA_CR41_PCM_ENABLE |
1699 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1700 udelay (100);
1701 }
1702
1703 if(card->legacy)
1704 {
1705 #if 0 /* this breaks on K7M */
1706 /* disable legacy stuff */
1707 pci_write_config_byte (pdev, 0x42, 0x00);
1708 udelay(10);
1709 #endif
1710
1711 /* route FM trap to IRQ, disable FM trap */
1712 pci_write_config_byte (pdev, 0x48, 0x05);
1713 udelay(10);
1714 }
1715
1716 /* disable all codec GPI interrupts */
1717 outl (0, pci_resource_start (pdev, 0) + 0x8C);
1718
1719 /* WARNING: this line is magic. Remove this
1720 * and things break. */
1721 /* enable variable rate */
1722 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1723 if ((tmp16 & 1) == 0)
1724 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1725
1726 DPRINTK ("EXIT, returning 0\n");
1727 return 0;
1728 }
1729
1730
1731 static void via_ac97_codec_wait (struct ac97_codec *codec)
1732 {
1733 assert (codec->private_data != NULL);
1734 via_ac97_wait_idle (codec->private_data);
1735 }
1736
1737
1738 static int __devinit via_ac97_init (struct via_info *card)
1739 {
1740 int rc;
1741 u16 tmp16;
1742
1743 DPRINTK ("ENTER\n");
1744
1745 assert (card != NULL);
1746
1747 card->ac97 = ac97_alloc_codec();
1748 if(card->ac97 == NULL)
1749 return -ENOMEM;
1750
1751 card->ac97->private_data = card;
1752 card->ac97->codec_read = via_ac97_read_reg;
1753 card->ac97->codec_write = via_ac97_write_reg;
1754 card->ac97->codec_wait = via_ac97_codec_wait;
1755
1756 card->ac97->dev_mixer = register_sound_mixer (&via_mixer_fops, -1);
1757 if (card->ac97->dev_mixer < 0) {
1758 printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n");
1759 DPRINTK ("EXIT, returning -EIO\n");
1760 ac97_release_codec(card->ac97);
1761 return -EIO;
1762 }
1763
1764 rc = via_ac97_reset (card);
1765 if (rc) {
1766 printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
1767 goto err_out;
1768 }
1769
1770 mdelay(10);
1771
1772 if (ac97_probe_codec (card->ac97) == 0) {
1773 printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
1774 rc = -EIO;
1775 goto err_out;
1776 }
1777
1778 /* enable variable rate */
1779 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1780 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1781
1782 /*
1783 * If we cannot enable VRA, we have a locked-rate codec.
1784 * We try again to enable VRA before assuming so, however.
1785 */
1786 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1787 if ((tmp16 & 1) == 0) {
1788 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1789 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1790 if ((tmp16 & 1) == 0) {
1791 card->locked_rate = 1;
1792 printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
1793 }
1794 }
1795
1796 DPRINTK ("EXIT, returning 0\n");
1797 return 0;
1798
1799 err_out:
1800 unregister_sound_mixer (card->ac97->dev_mixer);
1801 DPRINTK ("EXIT, returning %d\n", rc);
1802 ac97_release_codec(card->ac97);
1803 return rc;
1804 }
1805
1806
1807 static void via_ac97_cleanup (struct via_info *card)
1808 {
1809 DPRINTK ("ENTER\n");
1810
1811 assert (card != NULL);
1812 assert (card->ac97->dev_mixer >= 0);
1813
1814 unregister_sound_mixer (card->ac97->dev_mixer);
1815 ac97_release_codec(card->ac97);
1816
1817 DPRINTK ("EXIT\n");
1818 }
1819
1820
1821
1822 /****************************************************************
1823 *
1824 * Interrupt-related code
1825 *
1826 */
1827
1828 /**
1829 * via_intr_channel - handle an interrupt for a single channel
1830 * @card: unused
1831 * @chan: handle interrupt for this channel
1832 *
1833 * This is the "meat" of the interrupt handler,
1834 * containing the actions taken each time an interrupt
1835 * occurs. All communication and coordination with
1836 * userspace takes place here.
1837 *
1838 * Locking: inside card->lock
1839 */
1840
1841 static void via_intr_channel (struct via_info *card, struct via_channel *chan)
1842 {
1843 u8 status;
1844 int n;
1845
1846 /* check pertinent bits of status register for action bits */
1847 status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED);
1848 if (!status)
1849 return;
1850
1851 /* acknowledge any flagged bits ASAP */
1852 outb (status, chan->iobase);
1853
1854 if (!chan->sgtable) /* XXX: temporary solution */
1855 return;
1856
1857 /* grab current h/w ptr value */
1858 n = atomic_read (&chan->hw_ptr);
1859
1860 /* sanity check: make sure our h/w ptr doesn't have a weird value */
1861 assert (n >= 0);
1862 assert (n < chan->frag_number);
1863
1864
1865 /* reset SGD data structure in memory to reflect a full buffer,
1866 * and advance the h/w ptr, wrapping around to zero if needed
1867 */
1868 if (n == (chan->frag_number - 1)) {
1869 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_EOL);
1870 atomic_set (&chan->hw_ptr, 0);
1871 } else {
1872 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG);
1873 atomic_inc (&chan->hw_ptr);
1874 }
1875
1876 /* accounting crap for SNDCTL_DSP_GETxPTR */
1877 chan->n_irqs++;
1878 chan->bytes += chan->frag_size;
1879 /* FIXME - signed overflow is undefined */
1880 if (chan->bytes < 0) /* handle overflow of 31-bit value */
1881 chan->bytes = chan->frag_size;
1882 /* all following checks only occur when not in mmap(2) mode */
1883 if (!chan->is_mapped)
1884 {
1885 /* If we are recording, then n_frags represents the number
1886 * of fragments waiting to be handled by userspace.
1887 * If we are playback, then n_frags represents the number
1888 * of fragments remaining to be filled by userspace.
1889 * We increment here. If we reach max number of fragments,
1890 * this indicates an underrun/overrun. For this case under OSS,
1891 * we stop the record/playback process.
1892 */
1893 if (atomic_read (&chan->n_frags) < chan->frag_number)
1894 atomic_inc (&chan->n_frags);
1895 assert (atomic_read (&chan->n_frags) <= chan->frag_number);
1896 if (atomic_read (&chan->n_frags) == chan->frag_number) {
1897 chan->is_active = 0;
1898 via_chan_stop (chan->iobase);
1899 }
1900 }
1901 /* wake up anyone listening to see when interrupts occur */
1902 wake_up_all (&chan->wait);
1903
1904 DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n",
1905 chan->name, status, (long) inl (chan->iobase + 0x04),
1906 atomic_read (&chan->hw_ptr));
1907
1908 DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name,
1909 atomic_read (&chan->n_frags), missed);
1910 }
1911
1912
1913 static irqreturn_t via_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1914 {
1915 struct via_info *card = dev_id;
1916 u32 status32;
1917
1918 /* to minimize interrupt sharing costs, we use the SGD status
1919 * shadow register to check the status of all inputs and
1920 * outputs with a single 32-bit bus read. If no interrupt
1921 * conditions are flagged, we exit immediately
1922 */
1923 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1924 if (!(status32 & VIA_INTR_MASK))
1925 {
1926 #ifdef CONFIG_MIDI_VIA82CXXX
1927 if (card->midi_devc)
1928 uart401intr(irq, card->midi_devc, regs);
1929 #endif
1930 return IRQ_HANDLED;
1931 }
1932 DPRINTK ("intr, status32 == 0x%08X\n", status32);
1933
1934 /* synchronize interrupt handling under SMP. this spinlock
1935 * goes away completely on UP
1936 */
1937 spin_lock (&card->lock);
1938
1939 if (status32 & VIA_INTR_OUT)
1940 via_intr_channel (card, &card->ch_out);
1941 if (status32 & VIA_INTR_IN)
1942 via_intr_channel (card, &card->ch_in);
1943 if (status32 & VIA_INTR_FM)
1944 via_intr_channel (card, &card->ch_fm);
1945
1946 spin_unlock (&card->lock);
1947
1948 return IRQ_HANDLED;
1949 }
1950
1951 static irqreturn_t via_new_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1952 {
1953 struct via_info *card = dev_id;
1954 u32 status32;
1955
1956 /* to minimize interrupt sharing costs, we use the SGD status
1957 * shadow register to check the status of all inputs and
1958 * outputs with a single 32-bit bus read. If no interrupt
1959 * conditions are flagged, we exit immediately
1960 */
1961 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1962 if (!(status32 & VIA_NEW_INTR_MASK))
1963 return IRQ_NONE;
1964 /*
1965 * goes away completely on UP
1966 */
1967 spin_lock (&card->lock);
1968
1969 via_intr_channel (card, &card->ch_out);
1970 via_intr_channel (card, &card->ch_in);
1971 via_intr_channel (card, &card->ch_fm);
1972
1973 spin_unlock (&card->lock);
1974 return IRQ_HANDLED;
1975 }
1976
1977
1978 /**
1979 * via_interrupt_init - Initialize interrupt handling
1980 * @card: Private info for specified board
1981 *
1982 * Obtain and reserve IRQ for using in handling audio events.
1983 * Also, disable any IRQ-generating resources, to make sure
1984 * we don't get interrupts before we want them.
1985 */
1986
1987 static int via_interrupt_init (struct via_info *card)
1988 {
1989 u8 tmp8;
1990
1991 DPRINTK ("ENTER\n");
1992
1993 assert (card != NULL);
1994 assert (card->pdev != NULL);
1995
1996 /* check for sane IRQ number. can this ever happen? */
1997 if (card->pdev->irq < 2) {
1998 printk (KERN_ERR PFX "insane IRQ %d, aborting\n",
1999 card->pdev->irq);
2000 DPRINTK ("EXIT, returning -EIO\n");
2001 return -EIO;
2002 }
2003
2004 /* VIA requires this is done */
2005 pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq);
2006
2007 if(card->legacy)
2008 {
2009 /* make sure FM irq is not routed to us */
2010 pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
2011 if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
2012 tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
2013 pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
2014 }
2015 if (request_irq (card->pdev->irq, via_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
2016 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2017 card->pdev->irq);
2018 DPRINTK ("EXIT, returning -EBUSY\n");
2019 return -EBUSY;
2020 }
2021 }
2022 else
2023 {
2024 if (request_irq (card->pdev->irq, via_new_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
2025 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2026 card->pdev->irq);
2027 DPRINTK ("EXIT, returning -EBUSY\n");
2028 return -EBUSY;
2029 }
2030 }
2031
2032 DPRINTK ("EXIT, returning 0\n");
2033 return 0;
2034 }
2035
2036
2037 /****************************************************************
2038 *
2039 * OSS DSP device
2040 *
2041 */
2042
2043 static struct file_operations via_dsp_fops = {
2044 .owner = THIS_MODULE,
2045 .open = via_dsp_open,
2046 .release = via_dsp_release,
2047 .read = via_dsp_read,
2048 .write = via_dsp_write,
2049 .poll = via_dsp_poll,
2050 .llseek = no_llseek,
2051 .ioctl = via_dsp_ioctl,
2052 .mmap = via_dsp_mmap,
2053 };
2054
2055
2056 static int __devinit via_dsp_init (struct via_info *card)
2057 {
2058 u8 tmp8;
2059
2060 DPRINTK ("ENTER\n");
2061
2062 assert (card != NULL);
2063
2064 if(card->legacy)
2065 {
2066 /* turn off legacy features, if not already */
2067 pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
2068 if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE)) {
2069 tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE);
2070 pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8);
2071 }
2072 }
2073
2074 via_stop_everything (card);
2075
2076 card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1);
2077 if (card->dev_dsp < 0) {
2078 DPRINTK ("EXIT, returning -ENODEV\n");
2079 return -ENODEV;
2080 }
2081 DPRINTK ("EXIT, returning 0\n");
2082 return 0;
2083 }
2084
2085
2086 static void via_dsp_cleanup (struct via_info *card)
2087 {
2088 DPRINTK ("ENTER\n");
2089
2090 assert (card != NULL);
2091 assert (card->dev_dsp >= 0);
2092
2093 via_stop_everything (card);
2094
2095 unregister_sound_dsp (card->dev_dsp);
2096
2097 DPRINTK ("EXIT\n");
2098 }
2099
2100
2101 static struct page * via_mm_nopage (struct vm_area_struct * vma,
2102 unsigned long address, int *type)
2103 {
2104 struct via_info *card = vma->vm_private_data;
2105 struct via_channel *chan = &card->ch_out;
2106 struct page *dmapage;
2107 unsigned long pgoff;
2108 int rd, wr;
2109
2110 DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
2111 vma->vm_start,
2112 address - vma->vm_start,
2113 (address - vma->vm_start) >> PAGE_SHIFT,
2114 address);
2115
2116 if (address > vma->vm_end) {
2117 DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
2118 return NOPAGE_SIGBUS; /* Disallow mremap */
2119 }
2120 if (!card) {
2121 DPRINTK ("EXIT, returning NOPAGE_OOM\n");
2122 return NOPAGE_OOM; /* Nothing allocated */
2123 }
2124
2125 pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
2126 rd = card->ch_in.is_mapped;
2127 wr = card->ch_out.is_mapped;
2128
2129 #ifndef VIA_NDEBUG
2130 {
2131 unsigned long max_bufs = chan->frag_number;
2132 if (rd && wr) max_bufs *= 2;
2133 /* via_dsp_mmap() should ensure this */
2134 assert (pgoff < max_bufs);
2135 }
2136 #endif
2137
2138 /* if full-duplex (read+write) and we have two sets of bufs,
2139 * then the playback buffers come first, sez soundcard.c */
2140 if (pgoff >= chan->page_number) {
2141 pgoff -= chan->page_number;
2142 chan = &card->ch_in;
2143 } else if (!wr)
2144 chan = &card->ch_in;
2145
2146 assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
2147
2148 dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
2149 DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
2150 dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
2151 get_page (dmapage);
2152 if (type)
2153 *type = VM_FAULT_MINOR;
2154 return dmapage;
2155 }
2156
2157
2158 #ifndef VM_RESERVED
2159 static int via_mm_swapout (struct page *page, struct file *filp)
2160 {
2161 return 0;
2162 }
2163 #endif /* VM_RESERVED */
2164
2165
2166 static struct vm_operations_struct via_mm_ops = {
2167 .nopage = via_mm_nopage,
2168
2169 #ifndef VM_RESERVED
2170 .swapout = via_mm_swapout,
2171 #endif
2172 };
2173
2174
2175 static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
2176 {
2177 struct via_info *card;
2178 int nonblock = (file->f_flags & O_NONBLOCK);
2179 int rc = -EINVAL, rd=0, wr=0;
2180 unsigned long max_size, size, start, offset;
2181
2182 assert (file != NULL);
2183 assert (vma != NULL);
2184 card = file->private_data;
2185 assert (card != NULL);
2186
2187 DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
2188 vma->vm_start,
2189 vma->vm_end - vma->vm_start,
2190 vma->vm_pgoff);
2191
2192 max_size = 0;
2193 if (vma->vm_flags & VM_READ) {
2194 rd = 1;
2195 via_chan_set_buffering(card, &card->ch_in, -1);
2196 via_chan_buffer_init (card, &card->ch_in);
2197 max_size += card->ch_in.page_number << PAGE_SHIFT;
2198 }
2199 if (vma->vm_flags & VM_WRITE) {
2200 wr = 1;
2201 via_chan_set_buffering(card, &card->ch_out, -1);
2202 via_chan_buffer_init (card, &card->ch_out);
2203 max_size += card->ch_out.page_number << PAGE_SHIFT;
2204 }
2205
2206 start = vma->vm_start;
2207 offset = (vma->vm_pgoff << PAGE_SHIFT);
2208 size = vma->vm_end - vma->vm_start;
2209
2210 /* some basic size/offset sanity checks */
2211 if (size > max_size)
2212 goto out;
2213 if (offset > max_size - size)
2214 goto out;
2215
2216 rc = via_syscall_down (card, nonblock);
2217 if (rc) goto out;
2218
2219 vma->vm_ops = &via_mm_ops;
2220 vma->vm_private_data = card;
2221
2222 #ifdef VM_RESERVED
2223 vma->vm_flags |= VM_RESERVED;
2224 #endif
2225
2226 if (rd)
2227 card->ch_in.is_mapped = 1;
2228 if (wr)
2229 card->ch_out.is_mapped = 1;
2230
2231 up (&card->syscall_sem);
2232 rc = 0;
2233
2234 out:
2235 DPRINTK ("EXIT, returning %d\n", rc);
2236 return rc;
2237 }
2238
2239
2240 static ssize_t via_dsp_do_read (struct via_info *card,
2241 char __user *userbuf, size_t count,
2242 int nonblock)
2243 {
2244 DECLARE_WAITQUEUE(wait, current);
2245 const char __user *orig_userbuf = userbuf;
2246 struct via_channel *chan = &card->ch_in;
2247 size_t size;
2248 int n, tmp;
2249 ssize_t ret = 0;
2250
2251 /* if SGD has not yet been started, start it */
2252 via_chan_maybe_start (chan);
2253
2254 handle_one_block:
2255 /* just to be a nice neighbor */
2256 /* Thomas Sailer:
2257 * But also to ourselves, release semaphore if we do so */
2258 if (need_resched()) {
2259 up(&card->syscall_sem);
2260 schedule ();
2261 ret = via_syscall_down (card, nonblock);
2262 if (ret)
2263 goto out;
2264 }
2265
2266 /* grab current channel software pointer. In the case of
2267 * recording, this is pointing to the next buffer that
2268 * will receive data from the audio hardware.
2269 */
2270 n = chan->sw_ptr;
2271
2272 /* n_frags represents the number of fragments waiting
2273 * to be copied to userland. sleep until at least
2274 * one buffer has been read from the audio hardware.
2275 */
2276 add_wait_queue(&chan->wait, &wait);
2277 for (;;) {
2278 __set_current_state(TASK_INTERRUPTIBLE);
2279 tmp = atomic_read (&chan->n_frags);
2280 assert (tmp >= 0);
2281 assert (tmp <= chan->frag_number);
2282 if (tmp)
2283 break;
2284 if (nonblock || !chan->is_active) {
2285 ret = -EAGAIN;
2286 break;
2287 }
2288
2289 up(&card->syscall_sem);
2290
2291 DPRINTK ("Sleeping on block %d\n", n);
2292 schedule();
2293
2294 ret = via_syscall_down (card, nonblock);
2295 if (ret)
2296 break;
2297
2298 if (signal_pending (current)) {
2299 ret = -ERESTARTSYS;
2300 break;
2301 }
2302 }
2303 set_current_state(TASK_RUNNING);
2304 remove_wait_queue(&chan->wait, &wait);
2305 if (ret)
2306 goto out;
2307
2308 /* Now that we have a buffer we can read from, send
2309 * as much as sample data possible to userspace.
2310 */
2311 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2312 size_t slop_left = chan->frag_size - chan->slop_len;
2313 void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
2314 unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
2315
2316 size = (count < slop_left) ? count : slop_left;
2317 if (copy_to_user (userbuf,
2318 base + ofs + chan->slop_len,
2319 size)) {
2320 ret = -EFAULT;
2321 goto out;
2322 }
2323
2324 count -= size;
2325 chan->slop_len += size;
2326 userbuf += size;
2327 }
2328
2329 /* If we didn't copy the buffer completely to userspace,
2330 * stop now.
2331 */
2332 if (chan->slop_len < chan->frag_size)
2333 goto out;
2334
2335 /*
2336 * If we get to this point, we copied one buffer completely
2337 * to userspace, give the buffer back to the hardware.
2338 */
2339
2340 /* advance channel software pointer to point to
2341 * the next buffer from which we will copy
2342 */
2343 if (chan->sw_ptr == (chan->frag_number - 1))
2344 chan->sw_ptr = 0;
2345 else
2346 chan->sw_ptr++;
2347
2348 /* mark one less buffer waiting to be processed */
2349 assert (atomic_read (&chan->n_frags) > 0);
2350 atomic_dec (&chan->n_frags);
2351
2352 /* we are at a block boundary, there is no fragment data */
2353 chan->slop_len = 0;
2354
2355 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2356 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2357
2358 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2359 inb (card->baseaddr + 0x00),
2360 inb (card->baseaddr + 0x01),
2361 inb (card->baseaddr + 0x02),
2362 inl (card->baseaddr + 0x04),
2363 inl (card->baseaddr + 0x0C),
2364 inl (card->baseaddr + 0x80),
2365 inl (card->baseaddr + 0x84));
2366
2367 if (count > 0)
2368 goto handle_one_block;
2369
2370 out:
2371 return (userbuf != orig_userbuf) ? (userbuf - orig_userbuf) : ret;
2372 }
2373
2374
2375 static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
2376 {
2377 struct via_info *card;
2378 int nonblock = (file->f_flags & O_NONBLOCK);
2379 int rc;
2380
2381 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2382 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2383
2384 assert (file != NULL);
2385 card = file->private_data;
2386 assert (card != NULL);
2387
2388 rc = via_syscall_down (card, nonblock);
2389 if (rc) goto out;
2390
2391 if (card->ch_in.is_mapped) {
2392 rc = -ENXIO;
2393 goto out_up;
2394 }
2395
2396 via_chan_set_buffering(card, &card->ch_in, -1);
2397 rc = via_chan_buffer_init (card, &card->ch_in);
2398
2399 if (rc)
2400 goto out_up;
2401
2402 rc = via_dsp_do_read (card, buffer, count, nonblock);
2403
2404 out_up:
2405 up (&card->syscall_sem);
2406 out:
2407 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2408 return rc;
2409 }
2410
2411
2412 static ssize_t via_dsp_do_write (struct via_info *card,
2413 const char __user *userbuf, size_t count,
2414 int nonblock)
2415 {
2416 DECLARE_WAITQUEUE(wait, current);
2417 const char __user *orig_userbuf = userbuf;
2418 struct via_channel *chan = &card->ch_out;
2419 volatile struct via_sgd_table *sgtable = chan->sgtable;
2420 size_t size;
2421 int n, tmp;
2422 ssize_t ret = 0;
2423
2424 handle_one_block:
2425 /* just to be a nice neighbor */
2426 /* Thomas Sailer:
2427 * But also to ourselves, release semaphore if we do so */
2428 if (need_resched()) {
2429 up(&card->syscall_sem);
2430 schedule ();
2431 ret = via_syscall_down (card, nonblock);
2432 if (ret)
2433 goto out;
2434 }
2435
2436 /* grab current channel fragment pointer. In the case of
2437 * playback, this is pointing to the next fragment that
2438 * should receive data from userland.
2439 */
2440 n = chan->sw_ptr;
2441
2442 /* n_frags represents the number of fragments remaining
2443 * to be filled by userspace. Sleep until
2444 * at least one fragment is available for our use.
2445 */
2446 add_wait_queue(&chan->wait, &wait);
2447 for (;;) {
2448 __set_current_state(TASK_INTERRUPTIBLE);
2449 tmp = atomic_read (&chan->n_frags);
2450 assert (tmp >= 0);
2451 assert (tmp <= chan->frag_number);
2452 if (tmp)
2453 break;
2454 if (nonblock || !chan->is_active) {
2455 ret = -EAGAIN;
2456 break;
2457 }
2458
2459 up(&card->syscall_sem);
2460
2461 DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
2462 schedule();
2463
2464 ret = via_syscall_down (card, nonblock);
2465 if (ret)
2466 break;
2467
2468 if (signal_pending (current)) {
2469 ret = -ERESTARTSYS;
2470 break;
2471 }
2472 }
2473 set_current_state(TASK_RUNNING);
2474 remove_wait_queue(&chan->wait, &wait);
2475 if (ret)
2476 goto out;
2477
2478 /* Now that we have at least one fragment we can write to, fill the buffer
2479 * as much as possible with data from userspace.
2480 */
2481 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2482 size_t slop_left = chan->frag_size - chan->slop_len;
2483
2484 size = (count < slop_left) ? count : slop_left;
2485 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,
2486 userbuf, size)) {
2487 ret = -EFAULT;
2488 goto out;
2489 }
2490
2491 count -= size;
2492 chan->slop_len += size;
2493 userbuf += size;
2494 }
2495
2496 /* If we didn't fill up the buffer with data, stop now.
2497 * Put a 'stop' marker in the DMA table too, to tell the
2498 * audio hardware to stop if it gets here.
2499 */
2500 if (chan->slop_len < chan->frag_size) {
2501 sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
2502 goto out;
2503 }
2504
2505 /*
2506 * If we get to this point, we have filled a buffer with
2507 * audio data, flush the buffer to audio hardware.
2508 */
2509
2510 /* Record the true size for the audio hardware to notice */
2511 if (n == (chan->frag_number - 1))
2512 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
2513 else
2514 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
2515
2516 /* advance channel software pointer to point to
2517 * the next buffer we will fill with data
2518 */
2519 if (chan->sw_ptr == (chan->frag_number - 1))
2520 chan->sw_ptr = 0;
2521 else
2522 chan->sw_ptr++;
2523
2524 /* mark one less buffer as being available for userspace consumption */
2525 assert (atomic_read (&chan->n_frags) > 0);
2526 atomic_dec (&chan->n_frags);
2527
2528 /* we are at a block boundary, there is no fragment data */
2529 chan->slop_len = 0;
2530
2531 /* if SGD has not yet been started, start it */
2532 via_chan_maybe_start (chan);
2533
2534 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2535 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2536
2537 DPRINTK ("regs==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n",
2538 inb (card->baseaddr + 0x00),
2539 inb (card->baseaddr + 0x01),
2540 inb (card->baseaddr + 0x02),
2541 inl (card->baseaddr + 0x04),
2542 inl (card->baseaddr + 0x08),
2543 inl (card->baseaddr + 0x0C),
2544 inl (card->baseaddr + 0x80),
2545 inl (card->baseaddr + 0x84));
2546
2547 if (count > 0)
2548 goto handle_one_block;
2549
2550 out:
2551 if (userbuf - orig_userbuf)
2552 return userbuf - orig_userbuf;
2553 else
2554 return ret;
2555 }
2556
2557
2558 static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
2559 {
2560 struct via_info *card;
2561 ssize_t rc;
2562 int nonblock = (file->f_flags & O_NONBLOCK);
2563
2564 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2565 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2566
2567 assert (file != NULL);
2568 card = file->private_data;
2569 assert (card != NULL);
2570
2571 rc = via_syscall_down (card, nonblock);
2572 if (rc) goto out;
2573
2574 if (card->ch_out.is_mapped) {
2575 rc = -ENXIO;
2576 goto out_up;
2577 }
2578
2579 via_chan_set_buffering(card, &card->ch_out, -1);
2580 rc = via_chan_buffer_init (card, &card->ch_out);
2581
2582 if (rc)
2583 goto out_up;
2584
2585 rc = via_dsp_do_write (card, buffer, count, nonblock);
2586
2587 out_up:
2588 up (&card->syscall_sem);
2589 out:
2590 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2591 return rc;
2592 }
2593
2594
2595 static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
2596 {
2597 struct via_info *card;
2598 struct via_channel *chan;
2599 unsigned int mask = 0;
2600
2601 DPRINTK ("ENTER\n");
2602
2603 assert (file != NULL);
2604 card = file->private_data;
2605 assert (card != NULL);
2606
2607 if (file->f_mode & FMODE_READ) {
2608 chan = &card->ch_in;
2609 if (sg_active (chan->iobase))
2610 poll_wait(file, &chan->wait, wait);
2611 if (atomic_read (&chan->n_frags) > 0)
2612 mask |= POLLIN | POLLRDNORM;
2613 }
2614
2615 if (file->f_mode & FMODE_WRITE) {
2616 chan = &card->ch_out;
2617 if (sg_active (chan->iobase))
2618 poll_wait(file, &chan->wait, wait);
2619 if (atomic_read (&chan->n_frags) > 0)
2620 mask |= POLLOUT | POLLWRNORM;
2621 }
2622
2623 DPRINTK ("EXIT, returning %u\n", mask);
2624 return mask;
2625 }
2626
2627
2628 /**
2629 * via_dsp_drain_playback - sleep until all playback samples are flushed
2630 * @card: Private info for specified board
2631 * @chan: Channel to drain
2632 * @nonblock: boolean, non-zero if O_NONBLOCK is set
2633 *
2634 * Sleeps until all playback has been flushed to the audio
2635 * hardware.
2636 *
2637 * Locking: inside card->syscall_sem
2638 */
2639
2640 static int via_dsp_drain_playback (struct via_info *card,
2641 struct via_channel *chan, int nonblock)
2642 {
2643 DECLARE_WAITQUEUE(wait, current);
2644 int ret = 0;
2645
2646 DPRINTK ("ENTER, nonblock = %d\n", nonblock);
2647
2648 if (chan->slop_len > 0)
2649 via_chan_flush_frag (chan);
2650
2651 if (atomic_read (&chan->n_frags) == chan->frag_number)
2652 goto out;
2653
2654 via_chan_maybe_start (chan);
2655
2656 add_wait_queue(&chan->wait, &wait);
2657 for (;;) {
2658 DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number);
2659 __set_current_state(TASK_INTERRUPTIBLE);
2660 if (atomic_read (&chan->n_frags) >= chan->frag_number)
2661 break;
2662
2663 if (nonblock) {
2664 DPRINTK ("EXIT, returning -EAGAIN\n");
2665 ret = -EAGAIN;
2666 break;
2667 }
2668
2669 #ifdef VIA_DEBUG
2670 {
2671 u8 r40,r41,r42,r43,r44,r48;
2672 pci_read_config_byte (card->pdev, 0x40, &r40);
2673 pci_read_config_byte (card->pdev, 0x41, &r41);
2674 pci_read_config_byte (card->pdev, 0x42, &r42);
2675 pci_read_config_byte (card->pdev, 0x43, &r43);
2676 pci_read_config_byte (card->pdev, 0x44, &r44);
2677 pci_read_config_byte (card->pdev, 0x48, &r48);
2678 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2679 r40,r41,r42,r43,r44,r48);
2680
2681 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2682 inb (card->baseaddr + 0x00),
2683 inb (card->baseaddr + 0x01),
2684 inb (card->baseaddr + 0x02),
2685 inl (card->baseaddr + 0x04),
2686 inl (card->baseaddr + 0x0C),
2687 inl (card->baseaddr + 0x80),
2688 inl (card->baseaddr + 0x84));
2689 }
2690
2691 if (!chan->is_active)
2692 printk (KERN_ERR "sleeping but not active\n");
2693 #endif
2694
2695 up(&card->syscall_sem);
2696
2697 DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
2698 schedule();
2699
2700 if ((ret = via_syscall_down (card, nonblock)))
2701 break;
2702
2703 if (signal_pending (current)) {
2704 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
2705 ret = -ERESTARTSYS;
2706 break;
2707 }
2708 }
2709 set_current_state(TASK_RUNNING);
2710 remove_wait_queue(&chan->wait, &wait);
2711
2712 #ifdef VIA_DEBUG
2713 {
2714 u8 r40,r41,r42,r43,r44,r48;
2715 pci_read_config_byte (card->pdev, 0x40, &r40);
2716 pci_read_config_byte (card->pdev, 0x41, &r41);
2717 pci_read_config_byte (card->pdev, 0x42, &r42);
2718 pci_read_config_byte (card->pdev, 0x43, &r43);
2719 pci_read_config_byte (card->pdev, 0x44, &r44);
2720 pci_read_config_byte (card->pdev, 0x48, &r48);
2721 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2722 r40,r41,r42,r43,r44,r48);
2723
2724 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2725 inb (card->baseaddr + 0x00),
2726 inb (card->baseaddr + 0x01),
2727 inb (card->baseaddr + 0x02),
2728 inl (card->baseaddr + 0x04),
2729 inl (card->baseaddr + 0x0C),
2730 inl (card->baseaddr + 0x80),
2731 inl (card->baseaddr + 0x84));
2732
2733 DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
2734 }
2735 #endif
2736
2737 out:
2738 DPRINTK ("EXIT, returning %d\n", ret);
2739 return ret;
2740 }
2741
2742
2743 /**
2744 * via_dsp_ioctl_space - get information about channel buffering
2745 * @card: Private info for specified board
2746 * @chan: pointer to channel-specific info
2747 * @arg: user buffer for returned information
2748 *
2749 * Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
2750 *
2751 * Locking: inside card->syscall_sem
2752 */
2753
2754 static int via_dsp_ioctl_space (struct via_info *card,
2755 struct via_channel *chan,
2756 void __user *arg)
2757 {
2758 audio_buf_info info;
2759
2760 via_chan_set_buffering(card, chan, -1);
2761
2762 info.fragstotal = chan->frag_number;
2763 info.fragsize = chan->frag_size;
2764
2765 /* number of full fragments we can read/write without blocking */
2766 info.fragments = atomic_read (&chan->n_frags);
2767
2768 if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0))
2769 info.fragments--;
2770
2771 /* number of bytes that can be read or written immediately
2772 * without blocking.
2773 */
2774 info.bytes = (info.fragments * chan->frag_size);
2775 if (chan->slop_len % chan->frag_size > 0)
2776 info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size);
2777
2778 DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n",
2779 info.fragstotal,
2780 info.fragsize,
2781 info.fragments,
2782 info.bytes);
2783
2784 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2785 }
2786
2787
2788 /**
2789 * via_dsp_ioctl_ptr - get information about hardware buffer ptr
2790 * @card: Private info for specified board
2791 * @chan: pointer to channel-specific info
2792 * @arg: user buffer for returned information
2793 *
2794 * Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
2795 *
2796 * Locking: inside card->syscall_sem
2797 */
2798
2799 static int via_dsp_ioctl_ptr (struct via_info *card,
2800 struct via_channel *chan,
2801 void __user *arg)
2802 {
2803 count_info info;
2804
2805 spin_lock_irq (&card->lock);
2806
2807 info.bytes = chan->bytes;
2808 info.blocks = chan->n_irqs;
2809 chan->n_irqs = 0;
2810
2811 spin_unlock_irq (&card->lock);
2812
2813 if (chan->is_active) {
2814 unsigned long extra;
2815 info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size;
2816 extra = chan->frag_size - via_sg_offset(chan);
2817 info.ptr += extra;
2818 info.bytes += extra;
2819 } else {
2820 info.ptr = 0;
2821 }
2822
2823 DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n",
2824 info.bytes,
2825 info.blocks,
2826 info.ptr);
2827
2828 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2829 }
2830
2831
2832 static int via_dsp_ioctl_trigger (struct via_channel *chan, int val)
2833 {
2834 int enable, do_something;
2835
2836 if (chan->is_record)
2837 enable = (val & PCM_ENABLE_INPUT);
2838 else
2839 enable = (val & PCM_ENABLE_OUTPUT);
2840
2841 if (!chan->is_enabled && enable) {
2842 do_something = 1;
2843 } else if (chan->is_enabled && !enable) {
2844 do_something = -1;
2845 } else {
2846 do_something = 0;
2847 }
2848
2849 DPRINTK ("enable=%d, do_something=%d\n",
2850 enable, do_something);
2851
2852 if (chan->is_active && do_something)
2853 return -EINVAL;
2854
2855 if (do_something == 1) {
2856 chan->is_enabled = 1;
2857 via_chan_maybe_start (chan);
2858 DPRINTK ("Triggering input\n");
2859 }
2860
2861 else if (do_something == -1) {
2862 chan->is_enabled = 0;
2863 DPRINTK ("Setup input trigger\n");
2864 }
2865
2866 return 0;
2867 }
2868
2869
2870 static int via_dsp_ioctl (struct inode *inode, struct file *file,
2871 unsigned int cmd, unsigned long arg)
2872 {
2873 int rc, rd=0, wr=0, val=0;
2874 struct via_info *card;
2875 struct via_channel *chan;
2876 int nonblock = (file->f_flags & O_NONBLOCK);
2877 int __user *ip = (int __user *)arg;
2878 void __user *p = (void __user *)arg;
2879
2880 assert (file != NULL);
2881 card = file->private_data;
2882 assert (card != NULL);
2883
2884 if (file->f_mode & FMODE_WRITE)
2885 wr = 1;
2886 if (file->f_mode & FMODE_READ)
2887 rd = 1;
2888
2889 rc = via_syscall_down (card, nonblock);
2890 if (rc)
2891 return rc;
2892 rc = -EINVAL;
2893
2894 switch (cmd) {
2895
2896 /* OSS API version. XXX unverified */
2897 case OSS_GETVERSION:
2898 DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n");
2899 rc = put_user (SOUND_VERSION, ip);
2900 break;
2901
2902 /* list of supported PCM data formats */
2903 case SNDCTL_DSP_GETFMTS:
2904 DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n");
2905 rc = put_user (AFMT_U8 | AFMT_S16_LE, ip);
2906 break;
2907
2908 /* query or set current channel's PCM data format */
2909 case SNDCTL_DSP_SETFMT:
2910 if (get_user(val, ip)) {
2911 rc = -EFAULT;
2912 break;
2913 }
2914 DPRINTK ("DSP_SETFMT, val==%d\n", val);
2915 if (val != AFMT_QUERY) {
2916 rc = 0;
2917
2918 if (rd)
2919 rc = via_chan_set_fmt (card, &card->ch_in, val);
2920
2921 if (rc >= 0 && wr)
2922 rc = via_chan_set_fmt (card, &card->ch_out, val);
2923
2924 if (rc < 0)
2925 break;
2926
2927 val = rc;
2928 } else {
2929 if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) ||
2930 (wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT)))
2931 val = AFMT_S16_LE;
2932 else
2933 val = AFMT_U8;
2934 }
2935 DPRINTK ("SETFMT EXIT, returning %d\n", val);
2936 rc = put_user (val, ip);
2937 break;
2938
2939 /* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */
2940 case SNDCTL_DSP_CHANNELS:
2941 if (get_user(val, ip)) {
2942 rc = -EFAULT;
2943 break;
2944 }
2945 DPRINTK ("DSP_CHANNELS, val==%d\n", val);
2946 if (val != 0) {
2947 rc = 0;
2948
2949 if (rd)
2950 rc = via_chan_set_stereo (card, &card->ch_in, val);
2951
2952 if (rc >= 0 && wr)
2953 rc = via_chan_set_stereo (card, &card->ch_out, val);
2954
2955 if (rc < 0)
2956 break;
2957
2958 val = rc;
2959 } else {
2960 if (rd)
2961 val = card->ch_in.channels;
2962 else
2963 val = card->ch_out.channels;
2964 }
2965 DPRINTK ("CHANNELS EXIT, returning %d\n", val);
2966 rc = put_user (val, ip);
2967 break;
2968
2969 /* enable (val is not zero) or disable (val == 0) stereo */
2970 case SNDCTL_DSP_STEREO:
2971 if (get_user(val, ip)) {
2972 rc = -EFAULT;
2973 break;
2974 }
2975 DPRINTK ("DSP_STEREO, val==%d\n", val);
2976 rc = 0;
2977
2978 if (rd)
2979 rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1);
2980 if (rc >= 0 && wr)
2981 rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1);
2982
2983 if (rc < 0)
2984 break;
2985
2986 val = rc - 1;
2987
2988 DPRINTK ("STEREO EXIT, returning %d\n", val);
2989 rc = put_user(val, ip);
2990 break;
2991
2992 /* query or set sampling rate */
2993 case SNDCTL_DSP_SPEED:
2994 if (get_user(val, ip)) {
2995 rc = -EFAULT;
2996 break;
2997 }
2998 DPRINTK ("DSP_SPEED, val==%d\n", val);
2999 if (val < 0) {
3000 rc = -EINVAL;
3001 break;
3002 }
3003 if (val > 0) {
3004 rc = 0;
3005
3006 if (rd)
3007 rc = via_chan_set_speed (card, &card->ch_in, val);
3008 if (rc >= 0 && wr)
3009 rc = via_chan_set_speed (card, &card->ch_out, val);
3010
3011 if (rc < 0)
3012 break;
3013
3014 val = rc;
3015 } else {
3016 if (rd)
3017 val = card->ch_in.rate;
3018 else if (wr)
3019 val = card->ch_out.rate;
3020 else
3021 val = 0;
3022 }
3023 DPRINTK ("SPEED EXIT, returning %d\n", val);
3024 rc = put_user (val, ip);
3025 break;
3026
3027 /* wait until all buffers have been played, and then stop device */
3028 case SNDCTL_DSP_SYNC:
3029 DPRINTK ("DSP_SYNC\n");
3030 rc = 0;
3031 if (wr) {
3032 DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n");
3033 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3034 }
3035 break;
3036
3037 /* stop recording/playback immediately */
3038 case SNDCTL_DSP_RESET:
3039 DPRINTK ("DSP_RESET\n");
3040 if (rd) {
3041 via_chan_clear (card, &card->ch_in);
3042 card->ch_in.frag_number = 0;
3043 card->ch_in.frag_size = 0;
3044 atomic_set(&card->ch_in.n_frags, 0);
3045 }
3046
3047 if (wr) {
3048 via_chan_clear (card, &card->ch_out);
3049 card->ch_out.frag_number = 0;
3050 card->ch_out.frag_size = 0;
3051 atomic_set(&card->ch_out.n_frags, 0);
3052 }
3053
3054 rc = 0;
3055 break;
3056
3057 case SNDCTL_DSP_NONBLOCK:
3058 file->f_flags |= O_NONBLOCK;
3059 rc = 0;
3060 break;
3061
3062 /* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
3063 case SNDCTL_DSP_GETCAPS:
3064 DPRINTK ("DSP_GETCAPS\n");
3065 rc = put_user(VIA_DSP_CAP, ip);
3066 break;
3067
3068 /* obtain buffer fragment size */
3069 case SNDCTL_DSP_GETBLKSIZE:
3070 DPRINTK ("DSP_GETBLKSIZE\n");
3071
3072 if (rd) {
3073 via_chan_set_buffering(card, &card->ch_in, -1);
3074 rc = put_user(card->ch_in.frag_size, ip);
3075 } else if (wr) {
3076 via_chan_set_buffering(card, &card->ch_out, -1);
3077 rc = put_user(card->ch_out.frag_size, ip);
3078 }
3079 break;
3080
3081 /* obtain information about input buffering */
3082 case SNDCTL_DSP_GETISPACE:
3083 DPRINTK ("DSP_GETISPACE\n");
3084 if (rd)
3085 rc = via_dsp_ioctl_space (card, &card->ch_in, p);
3086 break;
3087
3088 /* obtain information about output buffering */
3089 case SNDCTL_DSP_GETOSPACE:
3090 DPRINTK ("DSP_GETOSPACE\n");
3091 if (wr)
3092 rc = via_dsp_ioctl_space (card, &card->ch_out, p);
3093 break;
3094
3095 /* obtain information about input hardware pointer */
3096 case SNDCTL_DSP_GETIPTR:
3097 DPRINTK ("DSP_GETIPTR\n");
3098 if (rd)
3099 rc = via_dsp_ioctl_ptr (card, &card->ch_in, p);
3100 break;
3101
3102 /* obtain information about output hardware pointer */
3103 case SNDCTL_DSP_GETOPTR:
3104 DPRINTK ("DSP_GETOPTR\n");
3105 if (wr)
3106 rc = via_dsp_ioctl_ptr (card, &card->ch_out, p);
3107 break;
3108
3109 /* return number of bytes remaining to be played by DMA engine */
3110 case SNDCTL_DSP_GETODELAY:
3111 {
3112 DPRINTK ("DSP_GETODELAY\n");
3113
3114 chan = &card->ch_out;
3115
3116 if (!wr)
3117 break;
3118
3119 if (chan->is_active) {
3120
3121 val = chan->frag_number - atomic_read (&chan->n_frags);
3122
3123 assert(val >= 0);
3124
3125 if (val > 0) {
3126 val *= chan->frag_size;
3127 val -= chan->frag_size - via_sg_offset(chan);
3128 }
3129 val += chan->slop_len % chan->frag_size;
3130 } else
3131 val = 0;
3132
3133 assert (val <= (chan->frag_size * chan->frag_number));
3134
3135 DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val);
3136 rc = put_user (val, ip);
3137 break;
3138 }
3139
3140 /* handle the quick-start of a channel,
3141 * or the notification that a quick-start will
3142 * occur in the future
3143 */
3144 case SNDCTL_DSP_SETTRIGGER:
3145 if (get_user(val, ip)) {
3146 rc = -EFAULT;
3147 break;
3148 }
3149 DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n",
3150 rd, wr, card->ch_in.is_active, card->ch_out.is_active,
3151 card->ch_in.is_enabled, card->ch_out.is_enabled);
3152
3153 rc = 0;
3154
3155 if (rd)
3156 rc = via_dsp_ioctl_trigger (&card->ch_in, val);
3157
3158 if (!rc && wr)
3159 rc = via_dsp_ioctl_trigger (&card->ch_out, val);
3160
3161 break;
3162
3163 case SNDCTL_DSP_GETTRIGGER:
3164 val = 0;
3165 if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled)
3166 val |= PCM_ENABLE_INPUT;
3167 if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled)
3168 val |= PCM_ENABLE_OUTPUT;
3169 rc = put_user(val, ip);
3170 break;
3171
3172 /* Enable full duplex. Since we do this as soon as we are opened
3173 * with O_RDWR, this is mainly a no-op that always returns success.
3174 */
3175 case SNDCTL_DSP_SETDUPLEX:
3176 DPRINTK ("DSP_SETDUPLEX\n");
3177 if (!rd || !wr)
3178 break;
3179 rc = 0;
3180 break;
3181
3182 /* set fragment size. implemented as a successful no-op for now */
3183 case SNDCTL_DSP_SETFRAGMENT:
3184 if (get_user(val, ip)) {
3185 rc = -EFAULT;
3186 break;
3187 }
3188 DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val);
3189
3190 if (rd)
3191 rc = via_chan_set_buffering(card, &card->ch_in, val);
3192
3193 if (wr)
3194 rc = via_chan_set_buffering(card, &card->ch_out, val);
3195
3196 DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
3197 val & 0xFFFF,
3198 val & 0xFFFF,
3199 (val >> 16) & 0xFFFF,
3200 (val >> 16) & 0xFFFF);
3201
3202 rc = 0;
3203 break;
3204
3205 /* inform device of an upcoming pause in input (or output). */
3206 case SNDCTL_DSP_POST:
3207 DPRINTK ("DSP_POST\n");
3208 if (wr) {
3209 if (card->ch_out.slop_len > 0)
3210 via_chan_flush_frag (&card->ch_out);
3211 via_chan_maybe_start (&card->ch_out);
3212 }
3213
3214 rc = 0;
3215 break;
3216
3217 /* not implemented */
3218 default:
3219 DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n",
3220 cmd, p);
3221 break;
3222 }
3223
3224 up (&card->syscall_sem);
3225 DPRINTK ("EXIT, returning %d\n", rc);
3226 return rc;
3227 }
3228
3229
3230 static int via_dsp_open (struct inode *inode, struct file *file)
3231 {
3232 int minor = iminor(inode);
3233 struct via_info *card;
3234 struct pci_dev *pdev = NULL;
3235 struct via_channel *chan;
3236 struct pci_driver *drvr;
3237 int nonblock = (file->f_flags & O_NONBLOCK);
3238
3239 DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
3240
3241 if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) {
3242 DPRINTK ("EXIT, returning -EINVAL\n");
3243 return -EINVAL;
3244 }
3245
3246 card = NULL;
3247 while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
3248 drvr = pci_dev_driver (pdev);
3249 if (drvr == &via_driver) {
3250 assert (pci_get_drvdata (pdev) != NULL);
3251
3252 card = pci_get_drvdata (pdev);
3253 DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
3254 card->dev_dsp, minor,
3255 (card->dev_dsp ^ minor) & ~0xf);
3256
3257 if (((card->dev_dsp ^ minor) & ~0xf) == 0)
3258 goto match;
3259 }
3260 }
3261
3262 DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
3263 return -ENODEV;
3264
3265 match:
3266 if (nonblock) {
3267 if (down_trylock (&card->open_sem)) {
3268 DPRINTK ("EXIT, returning -EAGAIN\n");
3269 return -EAGAIN;
3270 }
3271 } else {
3272 if (down_interruptible (&card->open_sem)) {
3273 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
3274 return -ERESTARTSYS;
3275 }
3276 }
3277
3278 file->private_data = card;
3279 DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
3280
3281 /* handle input from analog source */
3282 if (file->f_mode & FMODE_READ) {
3283 chan = &card->ch_in;
3284
3285 via_chan_init (card, chan);
3286
3287 /* why is this forced to 16-bit stereo in all drivers? */
3288 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3289 chan->channels = 2;
3290
3291 // TO DO - use FIFO: via_capture_fifo(card, 1);
3292 via_chan_pcm_fmt (chan, 0);
3293 via_set_rate (card->ac97, chan, 44100);
3294 }
3295
3296 /* handle output to analog source */
3297 if (file->f_mode & FMODE_WRITE) {
3298 chan = &card->ch_out;
3299
3300 via_chan_init (card, chan);
3301
3302 if (file->f_mode & FMODE_READ) {
3303 /* if in duplex mode make the recording and playback channels
3304 have the same settings */
3305 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3306 chan->channels = 2;
3307 via_chan_pcm_fmt (chan, 0);
3308 via_set_rate (card->ac97, chan, 44100);
3309 } else {
3310 if ((minor & 0xf) == SND_DEV_DSP16) {
3311 chan->pcm_fmt = VIA_PCM_FMT_16BIT;
3312 via_chan_pcm_fmt (chan, 0);
3313 via_set_rate (card->ac97, chan, 44100);
3314 } else {
3315 via_chan_pcm_fmt (chan, 1);
3316 via_set_rate (card->ac97, chan, 8000);
3317 }
3318 }
3319 }
3320
3321 DPRINTK ("EXIT, returning 0\n");
3322 return nonseekable_open(inode, file);
3323 }
3324
3325
3326 static int via_dsp_release(struct inode *inode, struct file *file)
3327 {
3328 struct via_info *card;
3329 int nonblock = (file->f_flags & O_NONBLOCK);
3330 int rc;
3331
3332 DPRINTK ("ENTER\n");
3333
3334 assert (file != NULL);
3335 card = file->private_data;
3336 assert (card != NULL);
3337
3338 rc = via_syscall_down (card, nonblock);
3339 if (rc) {
3340 DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc);
3341 return rc;
3342 }
3343
3344 if (file->f_mode & FMODE_WRITE) {
3345 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3346 if (rc && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */
3347 printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
3348
3349 via_chan_free (card, &card->ch_out);
3350 via_chan_buffer_free(card, &card->ch_out);
3351 }
3352
3353 if (file->f_mode & FMODE_READ) {
3354 via_chan_free (card, &card->ch_in);
3355 via_chan_buffer_free (card, &card->ch_in);
3356 }
3357
3358 up (&card->syscall_sem);
3359 up (&card->open_sem);
3360
3361 DPRINTK ("EXIT, returning 0\n");
3362 return 0;
3363 }
3364
3365
3366 /****************************************************************
3367 *
3368 * Chip setup and kernel registration
3369 *
3370 *
3371 */
3372
3373 static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
3374 {
3375 #ifdef CONFIG_MIDI_VIA82CXXX
3376 u8 r42;
3377 #endif
3378 int rc;
3379 struct via_info *card;
3380 static int printed_version;
3381
3382 DPRINTK ("ENTER\n");
3383
3384 if (printed_version++ == 0)
3385 printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n");
3386
3387 rc = pci_enable_device (pdev);
3388 if (rc)
3389 goto err_out;
3390
3391 rc = pci_request_regions (pdev, "via82cxxx_audio");
3392 if (rc)
3393 goto err_out_disable;
3394
3395 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3396 if (rc)
3397 goto err_out_res;
3398 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3399 if (rc)
3400 goto err_out_res;
3401
3402 card = kmalloc (sizeof (*card), GFP_KERNEL);
3403 if (!card) {
3404 printk (KERN_ERR PFX "out of memory, aborting\n");
3405 rc = -ENOMEM;
3406 goto err_out_res;
3407 }
3408
3409 pci_set_drvdata (pdev, card);
3410
3411 memset (card, 0, sizeof (*card));
3412 card->pdev = pdev;
3413 card->baseaddr = pci_resource_start (pdev, 0);
3414 card->card_num = via_num_cards++;
3415 spin_lock_init (&card->lock);
3416 spin_lock_init (&card->ac97_lock);
3417 init_MUTEX (&card->syscall_sem);
3418 init_MUTEX (&card->open_sem);
3419
3420 /* we must init these now, in case the intr handler needs them */
3421 via_chan_init_defaults (card, &card->ch_out);
3422 via_chan_init_defaults (card, &card->ch_in);
3423 via_chan_init_defaults (card, &card->ch_fm);
3424
3425 /* if BAR 2 is present, chip is Rev H or later,
3426 * which means it has a few extra features */
3427 if (pci_resource_start (pdev, 2) > 0)
3428 card->rev_h = 1;
3429
3430 /* Overkill for now, but more flexible done right */
3431
3432 card->intmask = id->driver_data;
3433 card->legacy = !card->intmask;
3434 card->sixchannel = id->driver_data;
3435
3436 if(card->sixchannel)
3437 printk(KERN_INFO PFX "Six channel audio available\n");
3438 if (pdev->irq < 1) {
3439 printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq);
3440 rc = -ENODEV;
3441 goto err_out_kfree;
3442 }
3443
3444 if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) {
3445 printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n");
3446 rc = -ENODEV;
3447 goto err_out_kfree;
3448 }
3449
3450 pci_set_master(pdev);
3451
3452 /*
3453 * init AC97 mixer and codec
3454 */
3455 rc = via_ac97_init (card);
3456 if (rc) {
3457 printk (KERN_ERR PFX "AC97 init failed, aborting\n");
3458 goto err_out_kfree;
3459 }
3460
3461 /*
3462 * init DSP device
3463 */
3464 rc = via_dsp_init (card);
3465 if (rc) {
3466 printk (KERN_ERR PFX "DSP device init failed, aborting\n");
3467 goto err_out_have_mixer;
3468 }
3469
3470 /*
3471 * init and turn on interrupts, as the last thing we do
3472 */
3473 rc = via_interrupt_init (card);
3474 if (rc) {
3475 printk (KERN_ERR PFX "interrupt init failed, aborting\n");
3476 goto err_out_have_dsp;
3477 }
3478
3479 printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
3480 card->card_num + 1, card->baseaddr, pdev->irq);
3481
3482 #ifdef CONFIG_MIDI_VIA82CXXX
3483 /* Disable by default */
3484 card->midi_info.io_base = 0;
3485
3486 if(card->legacy)
3487 {
3488 pci_read_config_byte (pdev, 0x42, &r42);
3489 /* Disable MIDI interrupt */
3490 pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK);
3491 if (r42 & VIA_CR42_MIDI_ENABLE)
3492 {
3493 if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */
3494 card->midi_info.io_base = pci_resource_start (pdev, 2);
3495 else /* Address selected by byte 0x43 */
3496 {
3497 u8 r43;
3498 pci_read_config_byte (pdev, 0x43, &r43);
3499 card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2);
3500 }
3501
3502 card->midi_info.irq = -pdev->irq;
3503 if (probe_uart401(& card->midi_info, THIS_MODULE))
3504 {
3505 card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc;
3506 pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK);
3507 printk("Enabled Via MIDI\n");
3508 }
3509 }
3510 }
3511 #endif
3512
3513 DPRINTK ("EXIT, returning 0\n");
3514 return 0;
3515
3516 err_out_have_dsp:
3517 via_dsp_cleanup (card);
3518
3519 err_out_have_mixer:
3520 via_ac97_cleanup (card);
3521
3522 err_out_kfree:
3523 #ifndef VIA_NDEBUG
3524 memset (card, 0xAB, sizeof (*card)); /* poison memory */
3525 #endif
3526 kfree (card);
3527
3528 err_out_res:
3529 pci_release_regions (pdev);
3530
3531 err_out_disable:
3532 pci_disable_device (pdev);
3533
3534 err_out:
3535 pci_set_drvdata (pdev, NULL);
3536 DPRINTK ("EXIT - returning %d\n", rc);
3537 return rc;
3538 }
3539
3540
3541 static void __devexit via_remove_one (struct pci_dev *pdev)
3542 {
3543 struct via_info *card;
3544
3545 DPRINTK ("ENTER\n");
3546
3547 assert (pdev != NULL);
3548 card = pci_get_drvdata (pdev);
3549 assert (card != NULL);
3550
3551 #ifdef CONFIG_MIDI_VIA82CXXX
3552 if (card->midi_info.io_base)
3553 unload_uart401(&card->midi_info);
3554 #endif
3555
3556 free_irq (card->pdev->irq, card);
3557 via_dsp_cleanup (card);
3558 via_ac97_cleanup (card);
3559
3560 #ifndef VIA_NDEBUG
3561 memset (card, 0xAB, sizeof (*card)); /* poison memory */
3562 #endif
3563 kfree (card);
3564
3565 pci_set_drvdata (pdev, NULL);
3566
3567 pci_release_regions (pdev);
3568 pci_disable_device (pdev);
3569 pci_set_power_state (pdev, 3); /* ...zzzzzz */
3570
3571 DPRINTK ("EXIT\n");
3572 return;
3573 }
3574
3575
3576 /****************************************************************
3577 *
3578 * Driver initialization and cleanup
3579 *
3580 *
3581 */
3582
3583 static int __init init_via82cxxx_audio(void)
3584 {
3585 int rc;
3586
3587 DPRINTK ("ENTER\n");
3588
3589 rc = pci_register_driver (&via_driver);
3590 if (rc) {
3591 DPRINTK ("EXIT, returning %d\n", rc);
3592 return rc;
3593 }
3594
3595 DPRINTK ("EXIT, returning 0\n");
3596 return 0;
3597 }
3598
3599
3600 static void __exit cleanup_via82cxxx_audio(void)
3601 {
3602 DPRINTK ("ENTER\n");
3603
3604 pci_unregister_driver (&via_driver);
3605
3606 DPRINTK ("EXIT\n");
3607 }
3608
3609
3610 module_init(init_via82cxxx_audio);
3611 module_exit(cleanup_via82cxxx_audio);
3612
3613 MODULE_AUTHOR("Jeff Garzik");
3614 MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
3615 MODULE_LICENSE("GPL");
3616
Verdex Pro support