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Add fatal_signal_pending
[linux-2.6/mini2440.git] / sound / oss / via82cxxx_audio.c
blob5d3c0372df3289211223afe4968ff50eb4109cbb
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/module.h>
22 #include <linux/kernel.h>
23 #include <linux/fs.h>
24 #include <linux/mm.h>
25 #include <linux/pci.h>
26 #include <linux/poison.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/ioport.h>
36 #include <linux/delay.h>
37 #include <linux/dma-mapping.h>
38 #include <asm/io.h>
39 #include <asm/uaccess.h>
40 #include <linux/mutex.h>
41
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 unsigned locked_rate : 1;
311
312 int mixer_vol; /* 8233/35 volume - not yet implemented */
313
314 struct mutex syscall_mutex;
315 struct mutex open_mutex;
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 (!mutex_trylock(&card->syscall_mutex))
509 return -EAGAIN;
510 } else {
511 if (mutex_lock_interruptible(&card->syscall_mutex))
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_get_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 pci_dev_put(pdev);
1565 file->private_data = card->ac97;
1566
1567 DPRINTK ("EXIT, returning 0\n");
1568 return nonseekable_open(inode, file);
1569 }
1570
1571 static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
1572 unsigned long arg)
1573 {
1574 struct ac97_codec *codec = file->private_data;
1575 struct via_info *card;
1576 int nonblock = (file->f_flags & O_NONBLOCK);
1577 int rc;
1578
1579 DPRINTK ("ENTER\n");
1580
1581 assert (codec != NULL);
1582 card = codec->private_data;
1583 assert (card != NULL);
1584
1585 rc = via_syscall_down (card, nonblock);
1586 if (rc) goto out;
1587
1588 #if 0
1589 /*
1590 * Intercept volume control on 8233 and 8235
1591 */
1592 if(card->volume)
1593 {
1594 switch(cmd)
1595 {
1596 case SOUND_MIXER_READ_VOLUME:
1597 return card->mixer_vol;
1598 case SOUND_MIXER_WRITE_VOLUME:
1599 {
1600 int v;
1601 if(get_user(v, (int *)arg))
1602 {
1603 rc = -EFAULT;
1604 goto out;
1605 }
1606 card->mixer_vol = v;
1607 }
1608 }
1609 }
1610 #endif
1611 rc = codec->mixer_ioctl(codec, cmd, arg);
1612
1613 mutex_unlock(&card->syscall_mutex);
1614
1615 out:
1616 DPRINTK ("EXIT, returning %d\n", rc);
1617 return rc;
1618 }
1619
1620
1621 static const struct file_operations via_mixer_fops = {
1622 .owner = THIS_MODULE,
1623 .open = via_mixer_open,
1624 .llseek = no_llseek,
1625 .ioctl = via_mixer_ioctl,
1626 };
1627
1628
1629 static int __devinit via_ac97_reset (struct via_info *card)
1630 {
1631 struct pci_dev *pdev = card->pdev;
1632 u8 tmp8;
1633 u16 tmp16;
1634
1635 DPRINTK ("ENTER\n");
1636
1637 assert (pdev != NULL);
1638
1639 #ifndef NDEBUG
1640 {
1641 u8 r40,r41,r42,r43,r44,r48;
1642 pci_read_config_byte (card->pdev, 0x40, &r40);
1643 pci_read_config_byte (card->pdev, 0x41, &r41);
1644 pci_read_config_byte (card->pdev, 0x42, &r42);
1645 pci_read_config_byte (card->pdev, 0x43, &r43);
1646 pci_read_config_byte (card->pdev, 0x44, &r44);
1647 pci_read_config_byte (card->pdev, 0x48, &r48);
1648 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
1649 r40,r41,r42,r43,r44,r48);
1650
1651 spin_lock_irq (&card->lock);
1652 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
1653 inb (card->baseaddr + 0x00),
1654 inb (card->baseaddr + 0x01),
1655 inb (card->baseaddr + 0x02),
1656 inl (card->baseaddr + 0x04),
1657 inl (card->baseaddr + 0x0C),
1658 inl (card->baseaddr + 0x80),
1659 inl (card->baseaddr + 0x84));
1660 spin_unlock_irq (&card->lock);
1661
1662 }
1663 #endif
1664
1665 /*
1666 * Reset AC97 controller: enable, disable, enable,
1667 * pausing after each command for good luck. Only
1668 * do this if the codec is not ready, because it causes
1669 * loud pops and such due to such a hard codec reset.
1670 */
1671 pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
1672 if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
1673 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1674 VIA_CR41_AC97_ENABLE |
1675 VIA_CR41_AC97_RESET |
1676 VIA_CR41_AC97_WAKEUP);
1677 udelay (100);
1678
1679 pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
1680 udelay (100);
1681
1682 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1683 VIA_CR41_AC97_ENABLE |
1684 VIA_CR41_PCM_ENABLE |
1685 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1686 udelay (100);
1687 }
1688
1689 /* Make sure VRA is enabled, in case we didn't do a
1690 * complete codec reset, above
1691 */
1692 pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
1693 if (((tmp8 & VIA_CR41_VRA) == 0) ||
1694 ((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
1695 ((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
1696 ((tmp8 & VIA_CR41_AC97_RESET) == 0)) {
1697 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1698 VIA_CR41_AC97_ENABLE |
1699 VIA_CR41_PCM_ENABLE |
1700 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1701 udelay (100);
1702 }
1703
1704 if(card->legacy)
1705 {
1706 #if 0 /* this breaks on K7M */
1707 /* disable legacy stuff */
1708 pci_write_config_byte (pdev, 0x42, 0x00);
1709 udelay(10);
1710 #endif
1711
1712 /* route FM trap to IRQ, disable FM trap */
1713 pci_write_config_byte (pdev, 0x48, 0x05);
1714 udelay(10);
1715 }
1716
1717 /* disable all codec GPI interrupts */
1718 outl (0, pci_resource_start (pdev, 0) + 0x8C);
1719
1720 /* WARNING: this line is magic. Remove this
1721 * and things break. */
1722 /* enable variable rate */
1723 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1724 if ((tmp16 & 1) == 0)
1725 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1726
1727 DPRINTK ("EXIT, returning 0\n");
1728 return 0;
1729 }
1730
1731
1732 static void via_ac97_codec_wait (struct ac97_codec *codec)
1733 {
1734 assert (codec->private_data != NULL);
1735 via_ac97_wait_idle (codec->private_data);
1736 }
1737
1738
1739 static int __devinit via_ac97_init (struct via_info *card)
1740 {
1741 int rc;
1742 u16 tmp16;
1743
1744 DPRINTK ("ENTER\n");
1745
1746 assert (card != NULL);
1747
1748 card->ac97 = ac97_alloc_codec();
1749 if(card->ac97 == NULL)
1750 return -ENOMEM;
1751
1752 card->ac97->private_data = card;
1753 card->ac97->codec_read = via_ac97_read_reg;
1754 card->ac97->codec_write = via_ac97_write_reg;
1755 card->ac97->codec_wait = via_ac97_codec_wait;
1756
1757 card->ac97->dev_mixer = register_sound_mixer (&via_mixer_fops, -1);
1758 if (card->ac97->dev_mixer < 0) {
1759 printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n");
1760 DPRINTK ("EXIT, returning -EIO\n");
1761 ac97_release_codec(card->ac97);
1762 return -EIO;
1763 }
1764
1765 rc = via_ac97_reset (card);
1766 if (rc) {
1767 printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
1768 goto err_out;
1769 }
1770
1771 mdelay(10);
1772
1773 if (ac97_probe_codec (card->ac97) == 0) {
1774 printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
1775 rc = -EIO;
1776 goto err_out;
1777 }
1778
1779 /* enable variable rate */
1780 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1781 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1782
1783 /*
1784 * If we cannot enable VRA, we have a locked-rate codec.
1785 * We try again to enable VRA before assuming so, however.
1786 */
1787 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1788 if ((tmp16 & 1) == 0) {
1789 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1790 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1791 if ((tmp16 & 1) == 0) {
1792 card->locked_rate = 1;
1793 printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
1794 }
1795 }
1796
1797 DPRINTK ("EXIT, returning 0\n");
1798 return 0;
1799
1800 err_out:
1801 unregister_sound_mixer (card->ac97->dev_mixer);
1802 DPRINTK ("EXIT, returning %d\n", rc);
1803 ac97_release_codec(card->ac97);
1804 return rc;
1805 }
1806
1807
1808 static void via_ac97_cleanup (struct via_info *card)
1809 {
1810 DPRINTK ("ENTER\n");
1811
1812 assert (card != NULL);
1813 assert (card->ac97->dev_mixer >= 0);
1814
1815 unregister_sound_mixer (card->ac97->dev_mixer);
1816 ac97_release_codec(card->ac97);
1817
1818 DPRINTK ("EXIT\n");
1819 }
1820
1821
1822
1823 /****************************************************************
1824 *
1825 * Interrupt-related code
1826 *
1827 */
1828
1829 /**
1830 * via_intr_channel - handle an interrupt for a single channel
1831 * @card: unused
1832 * @chan: handle interrupt for this channel
1833 *
1834 * This is the "meat" of the interrupt handler,
1835 * containing the actions taken each time an interrupt
1836 * occurs. All communication and coordination with
1837 * userspace takes place here.
1838 *
1839 * Locking: inside card->lock
1840 */
1841
1842 static void via_intr_channel (struct via_info *card, struct via_channel *chan)
1843 {
1844 u8 status;
1845 int n;
1846
1847 /* check pertinent bits of status register for action bits */
1848 status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED);
1849 if (!status)
1850 return;
1851
1852 /* acknowledge any flagged bits ASAP */
1853 outb (status, chan->iobase);
1854
1855 if (!chan->sgtable) /* XXX: temporary solution */
1856 return;
1857
1858 /* grab current h/w ptr value */
1859 n = atomic_read (&chan->hw_ptr);
1860
1861 /* sanity check: make sure our h/w ptr doesn't have a weird value */
1862 assert (n >= 0);
1863 assert (n < chan->frag_number);
1864
1865
1866 /* reset SGD data structure in memory to reflect a full buffer,
1867 * and advance the h/w ptr, wrapping around to zero if needed
1868 */
1869 if (n == (chan->frag_number - 1)) {
1870 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_EOL);
1871 atomic_set (&chan->hw_ptr, 0);
1872 } else {
1873 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG);
1874 atomic_inc (&chan->hw_ptr);
1875 }
1876
1877 /* accounting crap for SNDCTL_DSP_GETxPTR */
1878 chan->n_irqs++;
1879 chan->bytes += chan->frag_size;
1880 /* FIXME - signed overflow is undefined */
1881 if (chan->bytes < 0) /* handle overflow of 31-bit value */
1882 chan->bytes = chan->frag_size;
1883 /* all following checks only occur when not in mmap(2) mode */
1884 if (!chan->is_mapped)
1885 {
1886 /* If we are recording, then n_frags represents the number
1887 * of fragments waiting to be handled by userspace.
1888 * If we are playback, then n_frags represents the number
1889 * of fragments remaining to be filled by userspace.
1890 * We increment here. If we reach max number of fragments,
1891 * this indicates an underrun/overrun. For this case under OSS,
1892 * we stop the record/playback process.
1893 */
1894 if (atomic_read (&chan->n_frags) < chan->frag_number)
1895 atomic_inc (&chan->n_frags);
1896 assert (atomic_read (&chan->n_frags) <= chan->frag_number);
1897 if (atomic_read (&chan->n_frags) == chan->frag_number) {
1898 chan->is_active = 0;
1899 via_chan_stop (chan->iobase);
1900 }
1901 }
1902 /* wake up anyone listening to see when interrupts occur */
1903 wake_up_all (&chan->wait);
1904
1905 DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n",
1906 chan->name, status, (long) inl (chan->iobase + 0x04),
1907 atomic_read (&chan->hw_ptr));
1908
1909 DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name,
1910 atomic_read (&chan->n_frags), missed);
1911 }
1912
1913
1914 static irqreturn_t via_interrupt(int irq, void *dev_id)
1915 {
1916 struct via_info *card = dev_id;
1917 u32 status32;
1918
1919 /* to minimize interrupt sharing costs, we use the SGD status
1920 * shadow register to check the status of all inputs and
1921 * outputs with a single 32-bit bus read. If no interrupt
1922 * conditions are flagged, we exit immediately
1923 */
1924 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1925 if (!(status32 & VIA_INTR_MASK))
1926 {
1927 #ifdef CONFIG_MIDI_VIA82CXXX
1928 if (card->midi_devc)
1929 uart401intr(irq, card->midi_devc);
1930 #endif
1931 return IRQ_HANDLED;
1932 }
1933 DPRINTK ("intr, status32 == 0x%08X\n", status32);
1934
1935 /* synchronize interrupt handling under SMP. this spinlock
1936 * goes away completely on UP
1937 */
1938 spin_lock (&card->lock);
1939
1940 if (status32 & VIA_INTR_OUT)
1941 via_intr_channel (card, &card->ch_out);
1942 if (status32 & VIA_INTR_IN)
1943 via_intr_channel (card, &card->ch_in);
1944 if (status32 & VIA_INTR_FM)
1945 via_intr_channel (card, &card->ch_fm);
1946
1947 spin_unlock (&card->lock);
1948
1949 return IRQ_HANDLED;
1950 }
1951
1952 static irqreturn_t via_new_interrupt(int irq, void *dev_id)
1953 {
1954 struct via_info *card = dev_id;
1955 u32 status32;
1956
1957 /* to minimize interrupt sharing costs, we use the SGD status
1958 * shadow register to check the status of all inputs and
1959 * outputs with a single 32-bit bus read. If no interrupt
1960 * conditions are flagged, we exit immediately
1961 */
1962 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1963 if (!(status32 & VIA_NEW_INTR_MASK))
1964 return IRQ_NONE;
1965 /*
1966 * goes away completely on UP
1967 */
1968 spin_lock (&card->lock);
1969
1970 via_intr_channel (card, &card->ch_out);
1971 via_intr_channel (card, &card->ch_in);
1972 via_intr_channel (card, &card->ch_fm);
1973
1974 spin_unlock (&card->lock);
1975 return IRQ_HANDLED;
1976 }
1977
1978
1979 /**
1980 * via_interrupt_init - Initialize interrupt handling
1981 * @card: Private info for specified board
1982 *
1983 * Obtain and reserve IRQ for using in handling audio events.
1984 * Also, disable any IRQ-generating resources, to make sure
1985 * we don't get interrupts before we want them.
1986 */
1987
1988 static int via_interrupt_init (struct via_info *card)
1989 {
1990 u8 tmp8;
1991
1992 DPRINTK ("ENTER\n");
1993
1994 assert (card != NULL);
1995 assert (card->pdev != NULL);
1996
1997 /* check for sane IRQ number. can this ever happen? */
1998 if (card->pdev->irq < 2) {
1999 printk (KERN_ERR PFX "insane IRQ %d, aborting\n",
2000 card->pdev->irq);
2001 DPRINTK ("EXIT, returning -EIO\n");
2002 return -EIO;
2003 }
2004
2005 /* VIA requires this is done */
2006 pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq);
2007
2008 if(card->legacy)
2009 {
2010 /* make sure FM irq is not routed to us */
2011 pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
2012 if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
2013 tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
2014 pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
2015 }
2016 if (request_irq (card->pdev->irq, via_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
2017 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2018 card->pdev->irq);
2019 DPRINTK ("EXIT, returning -EBUSY\n");
2020 return -EBUSY;
2021 }
2022 }
2023 else
2024 {
2025 if (request_irq (card->pdev->irq, via_new_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
2026 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2027 card->pdev->irq);
2028 DPRINTK ("EXIT, returning -EBUSY\n");
2029 return -EBUSY;
2030 }
2031 }
2032
2033 DPRINTK ("EXIT, returning 0\n");
2034 return 0;
2035 }
2036
2037
2038 /****************************************************************
2039 *
2040 * OSS DSP device
2041 *
2042 */
2043
2044 static const struct file_operations via_dsp_fops = {
2045 .owner = THIS_MODULE,
2046 .open = via_dsp_open,
2047 .release = via_dsp_release,
2048 .read = via_dsp_read,
2049 .write = via_dsp_write,
2050 .poll = via_dsp_poll,
2051 .llseek = no_llseek,
2052 .ioctl = via_dsp_ioctl,
2053 .mmap = via_dsp_mmap,
2054 };
2055
2056
2057 static int __devinit via_dsp_init (struct via_info *card)
2058 {
2059 u8 tmp8;
2060
2061 DPRINTK ("ENTER\n");
2062
2063 assert (card != NULL);
2064
2065 if(card->legacy)
2066 {
2067 /* turn off legacy features, if not already */
2068 pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
2069 if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE)) {
2070 tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE);
2071 pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8);
2072 }
2073 }
2074
2075 via_stop_everything (card);
2076
2077 card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1);
2078 if (card->dev_dsp < 0) {
2079 DPRINTK ("EXIT, returning -ENODEV\n");
2080 return -ENODEV;
2081 }
2082 DPRINTK ("EXIT, returning 0\n");
2083 return 0;
2084 }
2085
2086
2087 static void via_dsp_cleanup (struct via_info *card)
2088 {
2089 DPRINTK ("ENTER\n");
2090
2091 assert (card != NULL);
2092 assert (card->dev_dsp >= 0);
2093
2094 via_stop_everything (card);
2095
2096 unregister_sound_dsp (card->dev_dsp);
2097
2098 DPRINTK ("EXIT\n");
2099 }
2100
2101
2102 static struct page * via_mm_nopage (struct vm_area_struct * vma,
2103 unsigned long address, int *type)
2104 {
2105 struct via_info *card = vma->vm_private_data;
2106 struct via_channel *chan = &card->ch_out;
2107 struct page *dmapage;
2108 unsigned long pgoff;
2109 int rd, wr;
2110
2111 DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
2112 vma->vm_start,
2113 address - vma->vm_start,
2114 (address - vma->vm_start) >> PAGE_SHIFT,
2115 address);
2116
2117 if (address > vma->vm_end) {
2118 DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
2119 return NOPAGE_SIGBUS; /* Disallow mremap */
2120 }
2121 if (!card) {
2122 DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
2123 return NOPAGE_SIGBUS; /* Nothing allocated */
2124 }
2125
2126 pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
2127 rd = card->ch_in.is_mapped;
2128 wr = card->ch_out.is_mapped;
2129
2130 #ifndef VIA_NDEBUG
2131 {
2132 unsigned long max_bufs = chan->frag_number;
2133 if (rd && wr) max_bufs *= 2;
2134 /* via_dsp_mmap() should ensure this */
2135 assert (pgoff < max_bufs);
2136 }
2137 #endif
2138
2139 /* if full-duplex (read+write) and we have two sets of bufs,
2140 * then the playback buffers come first, sez soundcard.c */
2141 if (pgoff >= chan->page_number) {
2142 pgoff -= chan->page_number;
2143 chan = &card->ch_in;
2144 } else if (!wr)
2145 chan = &card->ch_in;
2146
2147 assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
2148
2149 dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
2150 DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
2151 dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
2152 get_page (dmapage);
2153 if (type)
2154 *type = VM_FAULT_MINOR;
2155 return dmapage;
2156 }
2157
2158
2159 #ifndef VM_RESERVED
2160 static int via_mm_swapout (struct page *page, struct file *filp)
2161 {
2162 return 0;
2163 }
2164 #endif /* VM_RESERVED */
2165
2166
2167 static struct vm_operations_struct via_mm_ops = {
2168 .nopage = via_mm_nopage,
2169
2170 #ifndef VM_RESERVED
2171 .swapout = via_mm_swapout,
2172 #endif
2173 };
2174
2175
2176 static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
2177 {
2178 struct via_info *card;
2179 int nonblock = (file->f_flags & O_NONBLOCK);
2180 int rc = -EINVAL, rd=0, wr=0;
2181 unsigned long max_size, size, start, offset;
2182
2183 assert (file != NULL);
2184 assert (vma != NULL);
2185 card = file->private_data;
2186 assert (card != NULL);
2187
2188 DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
2189 vma->vm_start,
2190 vma->vm_end - vma->vm_start,
2191 vma->vm_pgoff);
2192
2193 max_size = 0;
2194 if (vma->vm_flags & VM_READ) {
2195 rd = 1;
2196 via_chan_set_buffering(card, &card->ch_in, -1);
2197 via_chan_buffer_init (card, &card->ch_in);
2198 max_size += card->ch_in.page_number << PAGE_SHIFT;
2199 }
2200 if (vma->vm_flags & VM_WRITE) {
2201 wr = 1;
2202 via_chan_set_buffering(card, &card->ch_out, -1);
2203 via_chan_buffer_init (card, &card->ch_out);
2204 max_size += card->ch_out.page_number << PAGE_SHIFT;
2205 }
2206
2207 start = vma->vm_start;
2208 offset = (vma->vm_pgoff << PAGE_SHIFT);
2209 size = vma->vm_end - vma->vm_start;
2210
2211 /* some basic size/offset sanity checks */
2212 if (size > max_size)
2213 goto out;
2214 if (offset > max_size - size)
2215 goto out;
2216
2217 rc = via_syscall_down (card, nonblock);
2218 if (rc) goto out;
2219
2220 vma->vm_ops = &via_mm_ops;
2221 vma->vm_private_data = card;
2222
2223 #ifdef VM_RESERVED
2224 vma->vm_flags |= VM_RESERVED;
2225 #endif
2226
2227 if (rd)
2228 card->ch_in.is_mapped = 1;
2229 if (wr)
2230 card->ch_out.is_mapped = 1;
2231
2232 mutex_unlock(&card->syscall_mutex);
2233 rc = 0;
2234
2235 out:
2236 DPRINTK ("EXIT, returning %d\n", rc);
2237 return rc;
2238 }
2239
2240
2241 static ssize_t via_dsp_do_read (struct via_info *card,
2242 char __user *userbuf, size_t count,
2243 int nonblock)
2244 {
2245 DECLARE_WAITQUEUE(wait, current);
2246 const char __user *orig_userbuf = userbuf;
2247 struct via_channel *chan = &card->ch_in;
2248 size_t size;
2249 int n, tmp;
2250 ssize_t ret = 0;
2251
2252 /* if SGD has not yet been started, start it */
2253 via_chan_maybe_start (chan);
2254
2255 handle_one_block:
2256 /* just to be a nice neighbor */
2257 /* Thomas Sailer:
2258 * But also to ourselves, release semaphore if we do so */
2259 if (need_resched()) {
2260 mutex_unlock(&card->syscall_mutex);
2261 schedule ();
2262 ret = via_syscall_down (card, nonblock);
2263 if (ret)
2264 goto out;
2265 }
2266
2267 /* grab current channel software pointer. In the case of
2268 * recording, this is pointing to the next buffer that
2269 * will receive data from the audio hardware.
2270 */
2271 n = chan->sw_ptr;
2272
2273 /* n_frags represents the number of fragments waiting
2274 * to be copied to userland. sleep until at least
2275 * one buffer has been read from the audio hardware.
2276 */
2277 add_wait_queue(&chan->wait, &wait);
2278 for (;;) {
2279 __set_current_state(TASK_INTERRUPTIBLE);
2280 tmp = atomic_read (&chan->n_frags);
2281 assert (tmp >= 0);
2282 assert (tmp <= chan->frag_number);
2283 if (tmp)
2284 break;
2285 if (nonblock || !chan->is_active) {
2286 ret = -EAGAIN;
2287 break;
2288 }
2289
2290 mutex_unlock(&card->syscall_mutex);
2291
2292 DPRINTK ("Sleeping on block %d\n", n);
2293 schedule();
2294
2295 ret = via_syscall_down (card, nonblock);
2296 if (ret)
2297 break;
2298
2299 if (signal_pending (current)) {
2300 ret = -ERESTARTSYS;
2301 break;
2302 }
2303 }
2304 set_current_state(TASK_RUNNING);
2305 remove_wait_queue(&chan->wait, &wait);
2306 if (ret)
2307 goto out;
2308
2309 /* Now that we have a buffer we can read from, send
2310 * as much as sample data possible to userspace.
2311 */
2312 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2313 size_t slop_left = chan->frag_size - chan->slop_len;
2314 void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
2315 unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
2316
2317 size = (count < slop_left) ? count : slop_left;
2318 if (copy_to_user (userbuf,
2319 base + ofs + chan->slop_len,
2320 size)) {
2321 ret = -EFAULT;
2322 goto out;
2323 }
2324
2325 count -= size;
2326 chan->slop_len += size;
2327 userbuf += size;
2328 }
2329
2330 /* If we didn't copy the buffer completely to userspace,
2331 * stop now.
2332 */
2333 if (chan->slop_len < chan->frag_size)
2334 goto out;
2335
2336 /*
2337 * If we get to this point, we copied one buffer completely
2338 * to userspace, give the buffer back to the hardware.
2339 */
2340
2341 /* advance channel software pointer to point to
2342 * the next buffer from which we will copy
2343 */
2344 if (chan->sw_ptr == (chan->frag_number - 1))
2345 chan->sw_ptr = 0;
2346 else
2347 chan->sw_ptr++;
2348
2349 /* mark one less buffer waiting to be processed */
2350 assert (atomic_read (&chan->n_frags) > 0);
2351 atomic_dec (&chan->n_frags);
2352
2353 /* we are at a block boundary, there is no fragment data */
2354 chan->slop_len = 0;
2355
2356 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2357 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2358
2359 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2360 inb (card->baseaddr + 0x00),
2361 inb (card->baseaddr + 0x01),
2362 inb (card->baseaddr + 0x02),
2363 inl (card->baseaddr + 0x04),
2364 inl (card->baseaddr + 0x0C),
2365 inl (card->baseaddr + 0x80),
2366 inl (card->baseaddr + 0x84));
2367
2368 if (count > 0)
2369 goto handle_one_block;
2370
2371 out:
2372 return (userbuf != orig_userbuf) ? (userbuf - orig_userbuf) : ret;
2373 }
2374
2375
2376 static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
2377 {
2378 struct via_info *card;
2379 int nonblock = (file->f_flags & O_NONBLOCK);
2380 int rc;
2381
2382 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2383 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2384
2385 assert (file != NULL);
2386 card = file->private_data;
2387 assert (card != NULL);
2388
2389 rc = via_syscall_down (card, nonblock);
2390 if (rc) goto out;
2391
2392 if (card->ch_in.is_mapped) {
2393 rc = -ENXIO;
2394 goto out_up;
2395 }
2396
2397 via_chan_set_buffering(card, &card->ch_in, -1);
2398 rc = via_chan_buffer_init (card, &card->ch_in);
2399
2400 if (rc)
2401 goto out_up;
2402
2403 rc = via_dsp_do_read (card, buffer, count, nonblock);
2404
2405 out_up:
2406 mutex_unlock(&card->syscall_mutex);
2407 out:
2408 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2409 return rc;
2410 }
2411
2412
2413 static ssize_t via_dsp_do_write (struct via_info *card,
2414 const char __user *userbuf, size_t count,
2415 int nonblock)
2416 {
2417 DECLARE_WAITQUEUE(wait, current);
2418 const char __user *orig_userbuf = userbuf;
2419 struct via_channel *chan = &card->ch_out;
2420 volatile struct via_sgd_table *sgtable = chan->sgtable;
2421 size_t size;
2422 int n, tmp;
2423 ssize_t ret = 0;
2424
2425 handle_one_block:
2426 /* just to be a nice neighbor */
2427 /* Thomas Sailer:
2428 * But also to ourselves, release semaphore if we do so */
2429 if (need_resched()) {
2430 mutex_unlock(&card->syscall_mutex);
2431 schedule ();
2432 ret = via_syscall_down (card, nonblock);
2433 if (ret)
2434 goto out;
2435 }
2436
2437 /* grab current channel fragment pointer. In the case of
2438 * playback, this is pointing to the next fragment that
2439 * should receive data from userland.
2440 */
2441 n = chan->sw_ptr;
2442
2443 /* n_frags represents the number of fragments remaining
2444 * to be filled by userspace. Sleep until
2445 * at least one fragment is available for our use.
2446 */
2447 add_wait_queue(&chan->wait, &wait);
2448 for (;;) {
2449 __set_current_state(TASK_INTERRUPTIBLE);
2450 tmp = atomic_read (&chan->n_frags);
2451 assert (tmp >= 0);
2452 assert (tmp <= chan->frag_number);
2453 if (tmp)
2454 break;
2455 if (nonblock || !chan->is_active) {
2456 ret = -EAGAIN;
2457 break;
2458 }
2459
2460 mutex_unlock(&card->syscall_mutex);
2461
2462 DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
2463 schedule();
2464
2465 ret = via_syscall_down (card, nonblock);
2466 if (ret)
2467 break;
2468
2469 if (signal_pending (current)) {
2470 ret = -ERESTARTSYS;
2471 break;
2472 }
2473 }
2474 set_current_state(TASK_RUNNING);
2475 remove_wait_queue(&chan->wait, &wait);
2476 if (ret)
2477 goto out;
2478
2479 /* Now that we have at least one fragment we can write to, fill the buffer
2480 * as much as possible with data from userspace.
2481 */
2482 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2483 size_t slop_left = chan->frag_size - chan->slop_len;
2484
2485 size = (count < slop_left) ? count : slop_left;
2486 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,
2487 userbuf, size)) {
2488 ret = -EFAULT;
2489 goto out;
2490 }
2491
2492 count -= size;
2493 chan->slop_len += size;
2494 userbuf += size;
2495 }
2496
2497 /* If we didn't fill up the buffer with data, stop now.
2498 * Put a 'stop' marker in the DMA table too, to tell the
2499 * audio hardware to stop if it gets here.
2500 */
2501 if (chan->slop_len < chan->frag_size) {
2502 sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
2503 goto out;
2504 }
2505
2506 /*
2507 * If we get to this point, we have filled a buffer with
2508 * audio data, flush the buffer to audio hardware.
2509 */
2510
2511 /* Record the true size for the audio hardware to notice */
2512 if (n == (chan->frag_number - 1))
2513 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
2514 else
2515 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
2516
2517 /* advance channel software pointer to point to
2518 * the next buffer we will fill with data
2519 */
2520 if (chan->sw_ptr == (chan->frag_number - 1))
2521 chan->sw_ptr = 0;
2522 else
2523 chan->sw_ptr++;
2524
2525 /* mark one less buffer as being available for userspace consumption */
2526 assert (atomic_read (&chan->n_frags) > 0);
2527 atomic_dec (&chan->n_frags);
2528
2529 /* we are at a block boundary, there is no fragment data */
2530 chan->slop_len = 0;
2531
2532 /* if SGD has not yet been started, start it */
2533 via_chan_maybe_start (chan);
2534
2535 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2536 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2537
2538 DPRINTK ("regs==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n",
2539 inb (card->baseaddr + 0x00),
2540 inb (card->baseaddr + 0x01),
2541 inb (card->baseaddr + 0x02),
2542 inl (card->baseaddr + 0x04),
2543 inl (card->baseaddr + 0x08),
2544 inl (card->baseaddr + 0x0C),
2545 inl (card->baseaddr + 0x80),
2546 inl (card->baseaddr + 0x84));
2547
2548 if (count > 0)
2549 goto handle_one_block;
2550
2551 out:
2552 if (userbuf - orig_userbuf)
2553 return userbuf - orig_userbuf;
2554 else
2555 return ret;
2556 }
2557
2558
2559 static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
2560 {
2561 struct via_info *card;
2562 ssize_t rc;
2563 int nonblock = (file->f_flags & O_NONBLOCK);
2564
2565 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2566 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2567
2568 assert (file != NULL);
2569 card = file->private_data;
2570 assert (card != NULL);
2571
2572 rc = via_syscall_down (card, nonblock);
2573 if (rc) goto out;
2574
2575 if (card->ch_out.is_mapped) {
2576 rc = -ENXIO;
2577 goto out_up;
2578 }
2579
2580 via_chan_set_buffering(card, &card->ch_out, -1);
2581 rc = via_chan_buffer_init (card, &card->ch_out);
2582
2583 if (rc)
2584 goto out_up;
2585
2586 rc = via_dsp_do_write (card, buffer, count, nonblock);
2587
2588 out_up:
2589 mutex_unlock(&card->syscall_mutex);
2590 out:
2591 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2592 return rc;
2593 }
2594
2595
2596 static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
2597 {
2598 struct via_info *card;
2599 struct via_channel *chan;
2600 unsigned int mask = 0;
2601
2602 DPRINTK ("ENTER\n");
2603
2604 assert (file != NULL);
2605 card = file->private_data;
2606 assert (card != NULL);
2607
2608 if (file->f_mode & FMODE_READ) {
2609 chan = &card->ch_in;
2610 if (sg_active (chan->iobase))
2611 poll_wait(file, &chan->wait, wait);
2612 if (atomic_read (&chan->n_frags) > 0)
2613 mask |= POLLIN | POLLRDNORM;
2614 }
2615
2616 if (file->f_mode & FMODE_WRITE) {
2617 chan = &card->ch_out;
2618 if (sg_active (chan->iobase))
2619 poll_wait(file, &chan->wait, wait);
2620 if (atomic_read (&chan->n_frags) > 0)
2621 mask |= POLLOUT | POLLWRNORM;
2622 }
2623
2624 DPRINTK ("EXIT, returning %u\n", mask);
2625 return mask;
2626 }
2627
2628
2629 /**
2630 * via_dsp_drain_playback - sleep until all playback samples are flushed
2631 * @card: Private info for specified board
2632 * @chan: Channel to drain
2633 * @nonblock: boolean, non-zero if O_NONBLOCK is set
2634 *
2635 * Sleeps until all playback has been flushed to the audio
2636 * hardware.
2637 *
2638 * Locking: inside card->syscall_mutex
2639 */
2640
2641 static int via_dsp_drain_playback (struct via_info *card,
2642 struct via_channel *chan, int nonblock)
2643 {
2644 DECLARE_WAITQUEUE(wait, current);
2645 int ret = 0;
2646
2647 DPRINTK ("ENTER, nonblock = %d\n", nonblock);
2648
2649 if (chan->slop_len > 0)
2650 via_chan_flush_frag (chan);
2651
2652 if (atomic_read (&chan->n_frags) == chan->frag_number)
2653 goto out;
2654
2655 via_chan_maybe_start (chan);
2656
2657 add_wait_queue(&chan->wait, &wait);
2658 for (;;) {
2659 DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number);
2660 __set_current_state(TASK_INTERRUPTIBLE);
2661 if (atomic_read (&chan->n_frags) >= chan->frag_number)
2662 break;
2663
2664 if (nonblock) {
2665 DPRINTK ("EXIT, returning -EAGAIN\n");
2666 ret = -EAGAIN;
2667 break;
2668 }
2669
2670 #ifdef VIA_DEBUG
2671 {
2672 u8 r40,r41,r42,r43,r44,r48;
2673 pci_read_config_byte (card->pdev, 0x40, &r40);
2674 pci_read_config_byte (card->pdev, 0x41, &r41);
2675 pci_read_config_byte (card->pdev, 0x42, &r42);
2676 pci_read_config_byte (card->pdev, 0x43, &r43);
2677 pci_read_config_byte (card->pdev, 0x44, &r44);
2678 pci_read_config_byte (card->pdev, 0x48, &r48);
2679 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2680 r40,r41,r42,r43,r44,r48);
2681
2682 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2683 inb (card->baseaddr + 0x00),
2684 inb (card->baseaddr + 0x01),
2685 inb (card->baseaddr + 0x02),
2686 inl (card->baseaddr + 0x04),
2687 inl (card->baseaddr + 0x0C),
2688 inl (card->baseaddr + 0x80),
2689 inl (card->baseaddr + 0x84));
2690 }
2691
2692 if (!chan->is_active)
2693 printk (KERN_ERR "sleeping but not active\n");
2694 #endif
2695
2696 mutex_unlock(&card->syscall_mutex);
2697
2698 DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
2699 schedule();
2700
2701 if ((ret = via_syscall_down (card, nonblock)))
2702 break;
2703
2704 if (signal_pending (current)) {
2705 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
2706 ret = -ERESTARTSYS;
2707 break;
2708 }
2709 }
2710 set_current_state(TASK_RUNNING);
2711 remove_wait_queue(&chan->wait, &wait);
2712
2713 #ifdef VIA_DEBUG
2714 {
2715 u8 r40,r41,r42,r43,r44,r48;
2716 pci_read_config_byte (card->pdev, 0x40, &r40);
2717 pci_read_config_byte (card->pdev, 0x41, &r41);
2718 pci_read_config_byte (card->pdev, 0x42, &r42);
2719 pci_read_config_byte (card->pdev, 0x43, &r43);
2720 pci_read_config_byte (card->pdev, 0x44, &r44);
2721 pci_read_config_byte (card->pdev, 0x48, &r48);
2722 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2723 r40,r41,r42,r43,r44,r48);
2724
2725 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2726 inb (card->baseaddr + 0x00),
2727 inb (card->baseaddr + 0x01),
2728 inb (card->baseaddr + 0x02),
2729 inl (card->baseaddr + 0x04),
2730 inl (card->baseaddr + 0x0C),
2731 inl (card->baseaddr + 0x80),
2732 inl (card->baseaddr + 0x84));
2733
2734 DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
2735 }
2736 #endif
2737
2738 out:
2739 DPRINTK ("EXIT, returning %d\n", ret);
2740 return ret;
2741 }
2742
2743
2744 /**
2745 * via_dsp_ioctl_space - get information about channel buffering
2746 * @card: Private info for specified board
2747 * @chan: pointer to channel-specific info
2748 * @arg: user buffer for returned information
2749 *
2750 * Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
2751 *
2752 * Locking: inside card->syscall_mutex
2753 */
2754
2755 static int via_dsp_ioctl_space (struct via_info *card,
2756 struct via_channel *chan,
2757 void __user *arg)
2758 {
2759 audio_buf_info info;
2760
2761 via_chan_set_buffering(card, chan, -1);
2762
2763 info.fragstotal = chan->frag_number;
2764 info.fragsize = chan->frag_size;
2765
2766 /* number of full fragments we can read/write without blocking */
2767 info.fragments = atomic_read (&chan->n_frags);
2768
2769 if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0))
2770 info.fragments--;
2771
2772 /* number of bytes that can be read or written immediately
2773 * without blocking.
2774 */
2775 info.bytes = (info.fragments * chan->frag_size);
2776 if (chan->slop_len % chan->frag_size > 0)
2777 info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size);
2778
2779 DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n",
2780 info.fragstotal,
2781 info.fragsize,
2782 info.fragments,
2783 info.bytes);
2784
2785 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2786 }
2787
2788
2789 /**
2790 * via_dsp_ioctl_ptr - get information about hardware buffer ptr
2791 * @card: Private info for specified board
2792 * @chan: pointer to channel-specific info
2793 * @arg: user buffer for returned information
2794 *
2795 * Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
2796 *
2797 * Locking: inside card->syscall_mutex
2798 */
2799
2800 static int via_dsp_ioctl_ptr (struct via_info *card,
2801 struct via_channel *chan,
2802 void __user *arg)
2803 {
2804 count_info info;
2805
2806 spin_lock_irq (&card->lock);
2807
2808 info.bytes = chan->bytes;
2809 info.blocks = chan->n_irqs;
2810 chan->n_irqs = 0;
2811
2812 spin_unlock_irq (&card->lock);
2813
2814 if (chan->is_active) {
2815 unsigned long extra;
2816 info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size;
2817 extra = chan->frag_size - via_sg_offset(chan);
2818 info.ptr += extra;
2819 info.bytes += extra;
2820 } else {
2821 info.ptr = 0;
2822 }
2823
2824 DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n",
2825 info.bytes,
2826 info.blocks,
2827 info.ptr);
2828
2829 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2830 }
2831
2832
2833 static int via_dsp_ioctl_trigger (struct via_channel *chan, int val)
2834 {
2835 int enable, do_something;
2836
2837 if (chan->is_record)
2838 enable = (val & PCM_ENABLE_INPUT);
2839 else
2840 enable = (val & PCM_ENABLE_OUTPUT);
2841
2842 if (!chan->is_enabled && enable) {
2843 do_something = 1;
2844 } else if (chan->is_enabled && !enable) {
2845 do_something = -1;
2846 } else {
2847 do_something = 0;
2848 }
2849
2850 DPRINTK ("enable=%d, do_something=%d\n",
2851 enable, do_something);
2852
2853 if (chan->is_active && do_something)
2854 return -EINVAL;
2855
2856 if (do_something == 1) {
2857 chan->is_enabled = 1;
2858 via_chan_maybe_start (chan);
2859 DPRINTK ("Triggering input\n");
2860 }
2861
2862 else if (do_something == -1) {
2863 chan->is_enabled = 0;
2864 DPRINTK ("Setup input trigger\n");
2865 }
2866
2867 return 0;
2868 }
2869
2870
2871 static int via_dsp_ioctl (struct inode *inode, struct file *file,
2872 unsigned int cmd, unsigned long arg)
2873 {
2874 int rc, rd=0, wr=0, val=0;
2875 struct via_info *card;
2876 struct via_channel *chan;
2877 int nonblock = (file->f_flags & O_NONBLOCK);
2878 int __user *ip = (int __user *)arg;
2879 void __user *p = (void __user *)arg;
2880
2881 assert (file != NULL);
2882 card = file->private_data;
2883 assert (card != NULL);
2884
2885 if (file->f_mode & FMODE_WRITE)
2886 wr = 1;
2887 if (file->f_mode & FMODE_READ)
2888 rd = 1;
2889
2890 rc = via_syscall_down (card, nonblock);
2891 if (rc)
2892 return rc;
2893 rc = -EINVAL;
2894
2895 switch (cmd) {
2896
2897 /* OSS API version. XXX unverified */
2898 case OSS_GETVERSION:
2899 DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n");
2900 rc = put_user (SOUND_VERSION, ip);
2901 break;
2902
2903 /* list of supported PCM data formats */
2904 case SNDCTL_DSP_GETFMTS:
2905 DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n");
2906 rc = put_user (AFMT_U8 | AFMT_S16_LE, ip);
2907 break;
2908
2909 /* query or set current channel's PCM data format */
2910 case SNDCTL_DSP_SETFMT:
2911 if (get_user(val, ip)) {
2912 rc = -EFAULT;
2913 break;
2914 }
2915 DPRINTK ("DSP_SETFMT, val==%d\n", val);
2916 if (val != AFMT_QUERY) {
2917 rc = 0;
2918
2919 if (rd)
2920 rc = via_chan_set_fmt (card, &card->ch_in, val);
2921
2922 if (rc >= 0 && wr)
2923 rc = via_chan_set_fmt (card, &card->ch_out, val);
2924
2925 if (rc < 0)
2926 break;
2927
2928 val = rc;
2929 } else {
2930 if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) ||
2931 (wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT)))
2932 val = AFMT_S16_LE;
2933 else
2934 val = AFMT_U8;
2935 }
2936 DPRINTK ("SETFMT EXIT, returning %d\n", val);
2937 rc = put_user (val, ip);
2938 break;
2939
2940 /* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */
2941 case SNDCTL_DSP_CHANNELS:
2942 if (get_user(val, ip)) {
2943 rc = -EFAULT;
2944 break;
2945 }
2946 DPRINTK ("DSP_CHANNELS, val==%d\n", val);
2947 if (val != 0) {
2948 rc = 0;
2949
2950 if (rd)
2951 rc = via_chan_set_stereo (card, &card->ch_in, val);
2952
2953 if (rc >= 0 && wr)
2954 rc = via_chan_set_stereo (card, &card->ch_out, val);
2955
2956 if (rc < 0)
2957 break;
2958
2959 val = rc;
2960 } else {
2961 if (rd)
2962 val = card->ch_in.channels;
2963 else
2964 val = card->ch_out.channels;
2965 }
2966 DPRINTK ("CHANNELS EXIT, returning %d\n", val);
2967 rc = put_user (val, ip);
2968 break;
2969
2970 /* enable (val is not zero) or disable (val == 0) stereo */
2971 case SNDCTL_DSP_STEREO:
2972 if (get_user(val, ip)) {
2973 rc = -EFAULT;
2974 break;
2975 }
2976 DPRINTK ("DSP_STEREO, val==%d\n", val);
2977 rc = 0;
2978
2979 if (rd)
2980 rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1);
2981 if (rc >= 0 && wr)
2982 rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1);
2983
2984 if (rc < 0)
2985 break;
2986
2987 val = rc - 1;
2988
2989 DPRINTK ("STEREO EXIT, returning %d\n", val);
2990 rc = put_user(val, ip);
2991 break;
2992
2993 /* query or set sampling rate */
2994 case SNDCTL_DSP_SPEED:
2995 if (get_user(val, ip)) {
2996 rc = -EFAULT;
2997 break;
2998 }
2999 DPRINTK ("DSP_SPEED, val==%d\n", val);
3000 if (val < 0) {
3001 rc = -EINVAL;
3002 break;
3003 }
3004 if (val > 0) {
3005 rc = 0;
3006
3007 if (rd)
3008 rc = via_chan_set_speed (card, &card->ch_in, val);
3009 if (rc >= 0 && wr)
3010 rc = via_chan_set_speed (card, &card->ch_out, val);
3011
3012 if (rc < 0)
3013 break;
3014
3015 val = rc;
3016 } else {
3017 if (rd)
3018 val = card->ch_in.rate;
3019 else if (wr)
3020 val = card->ch_out.rate;
3021 else
3022 val = 0;
3023 }
3024 DPRINTK ("SPEED EXIT, returning %d\n", val);
3025 rc = put_user (val, ip);
3026 break;
3027
3028 /* wait until all buffers have been played, and then stop device */
3029 case SNDCTL_DSP_SYNC:
3030 DPRINTK ("DSP_SYNC\n");
3031 rc = 0;
3032 if (wr) {
3033 DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n");
3034 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3035 }
3036 break;
3037
3038 /* stop recording/playback immediately */
3039 case SNDCTL_DSP_RESET:
3040 DPRINTK ("DSP_RESET\n");
3041 if (rd) {
3042 via_chan_clear (card, &card->ch_in);
3043 card->ch_in.frag_number = 0;
3044 card->ch_in.frag_size = 0;
3045 atomic_set(&card->ch_in.n_frags, 0);
3046 }
3047
3048 if (wr) {
3049 via_chan_clear (card, &card->ch_out);
3050 card->ch_out.frag_number = 0;
3051 card->ch_out.frag_size = 0;
3052 atomic_set(&card->ch_out.n_frags, 0);
3053 }
3054
3055 rc = 0;
3056 break;
3057
3058 case SNDCTL_DSP_NONBLOCK:
3059 file->f_flags |= O_NONBLOCK;
3060 rc = 0;
3061 break;
3062
3063 /* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
3064 case SNDCTL_DSP_GETCAPS:
3065 DPRINTK ("DSP_GETCAPS\n");
3066 rc = put_user(VIA_DSP_CAP, ip);
3067 break;
3068
3069 /* obtain buffer fragment size */
3070 case SNDCTL_DSP_GETBLKSIZE:
3071 DPRINTK ("DSP_GETBLKSIZE\n");
3072
3073 if (rd) {
3074 via_chan_set_buffering(card, &card->ch_in, -1);
3075 rc = put_user(card->ch_in.frag_size, ip);
3076 } else if (wr) {
3077 via_chan_set_buffering(card, &card->ch_out, -1);
3078 rc = put_user(card->ch_out.frag_size, ip);
3079 }
3080 break;
3081
3082 /* obtain information about input buffering */
3083 case SNDCTL_DSP_GETISPACE:
3084 DPRINTK ("DSP_GETISPACE\n");
3085 if (rd)
3086 rc = via_dsp_ioctl_space (card, &card->ch_in, p);
3087 break;
3088
3089 /* obtain information about output buffering */
3090 case SNDCTL_DSP_GETOSPACE:
3091 DPRINTK ("DSP_GETOSPACE\n");
3092 if (wr)
3093 rc = via_dsp_ioctl_space (card, &card->ch_out, p);
3094 break;
3095
3096 /* obtain information about input hardware pointer */
3097 case SNDCTL_DSP_GETIPTR:
3098 DPRINTK ("DSP_GETIPTR\n");
3099 if (rd)
3100 rc = via_dsp_ioctl_ptr (card, &card->ch_in, p);
3101 break;
3102
3103 /* obtain information about output hardware pointer */
3104 case SNDCTL_DSP_GETOPTR:
3105 DPRINTK ("DSP_GETOPTR\n");
3106 if (wr)
3107 rc = via_dsp_ioctl_ptr (card, &card->ch_out, p);
3108 break;
3109
3110 /* return number of bytes remaining to be played by DMA engine */
3111 case SNDCTL_DSP_GETODELAY:
3112 {
3113 DPRINTK ("DSP_GETODELAY\n");
3114
3115 chan = &card->ch_out;
3116
3117 if (!wr)
3118 break;
3119
3120 if (chan->is_active) {
3121
3122 val = chan->frag_number - atomic_read (&chan->n_frags);
3123
3124 assert(val >= 0);
3125
3126 if (val > 0) {
3127 val *= chan->frag_size;
3128 val -= chan->frag_size - via_sg_offset(chan);
3129 }
3130 val += chan->slop_len % chan->frag_size;
3131 } else
3132 val = 0;
3133
3134 assert (val <= (chan->frag_size * chan->frag_number));
3135
3136 DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val);
3137 rc = put_user (val, ip);
3138 break;
3139 }
3140
3141 /* handle the quick-start of a channel,
3142 * or the notification that a quick-start will
3143 * occur in the future
3144 */
3145 case SNDCTL_DSP_SETTRIGGER:
3146 if (get_user(val, ip)) {
3147 rc = -EFAULT;
3148 break;
3149 }
3150 DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n",
3151 rd, wr, card->ch_in.is_active, card->ch_out.is_active,
3152 card->ch_in.is_enabled, card->ch_out.is_enabled);
3153
3154 rc = 0;
3155
3156 if (rd)
3157 rc = via_dsp_ioctl_trigger (&card->ch_in, val);
3158
3159 if (!rc && wr)
3160 rc = via_dsp_ioctl_trigger (&card->ch_out, val);
3161
3162 break;
3163
3164 case SNDCTL_DSP_GETTRIGGER:
3165 val = 0;
3166 if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled)
3167 val |= PCM_ENABLE_INPUT;
3168 if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled)
3169 val |= PCM_ENABLE_OUTPUT;
3170 rc = put_user(val, ip);
3171 break;
3172
3173 /* Enable full duplex. Since we do this as soon as we are opened
3174 * with O_RDWR, this is mainly a no-op that always returns success.
3175 */
3176 case SNDCTL_DSP_SETDUPLEX:
3177 DPRINTK ("DSP_SETDUPLEX\n");
3178 if (!rd || !wr)
3179 break;
3180 rc = 0;
3181 break;
3182
3183 /* set fragment size. implemented as a successful no-op for now */
3184 case SNDCTL_DSP_SETFRAGMENT:
3185 if (get_user(val, ip)) {
3186 rc = -EFAULT;
3187 break;
3188 }
3189 DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val);
3190
3191 if (rd)
3192 rc = via_chan_set_buffering(card, &card->ch_in, val);
3193
3194 if (wr)
3195 rc = via_chan_set_buffering(card, &card->ch_out, val);
3196
3197 DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
3198 val & 0xFFFF,
3199 val & 0xFFFF,
3200 (val >> 16) & 0xFFFF,
3201 (val >> 16) & 0xFFFF);
3202
3203 rc = 0;
3204 break;
3205
3206 /* inform device of an upcoming pause in input (or output). */
3207 case SNDCTL_DSP_POST:
3208 DPRINTK ("DSP_POST\n");
3209 if (wr) {
3210 if (card->ch_out.slop_len > 0)
3211 via_chan_flush_frag (&card->ch_out);
3212 via_chan_maybe_start (&card->ch_out);
3213 }
3214
3215 rc = 0;
3216 break;
3217
3218 /* not implemented */
3219 default:
3220 DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n",
3221 cmd, p);
3222 break;
3223 }
3224
3225 mutex_unlock(&card->syscall_mutex);
3226 DPRINTK ("EXIT, returning %d\n", rc);
3227 return rc;
3228 }
3229
3230
3231 static int via_dsp_open (struct inode *inode, struct file *file)
3232 {
3233 int minor = iminor(inode);
3234 struct via_info *card;
3235 struct pci_dev *pdev = NULL;
3236 struct via_channel *chan;
3237 struct pci_driver *drvr;
3238 int nonblock = (file->f_flags & O_NONBLOCK);
3239
3240 DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
3241
3242 if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) {
3243 DPRINTK ("EXIT, returning -EINVAL\n");
3244 return -EINVAL;
3245 }
3246
3247 card = NULL;
3248 while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
3249 drvr = pci_dev_driver (pdev);
3250 if (drvr == &via_driver) {
3251 assert (pci_get_drvdata (pdev) != NULL);
3252
3253 card = pci_get_drvdata (pdev);
3254 DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
3255 card->dev_dsp, minor,
3256 (card->dev_dsp ^ minor) & ~0xf);
3257
3258 if (((card->dev_dsp ^ minor) & ~0xf) == 0)
3259 goto match;
3260 }
3261 }
3262
3263 DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
3264 return -ENODEV;
3265
3266 match:
3267 pci_dev_put(pdev);
3268 if (nonblock) {
3269 if (!mutex_trylock(&card->open_mutex)) {
3270 DPRINTK ("EXIT, returning -EAGAIN\n");
3271 return -EAGAIN;
3272 }
3273 } else {
3274 if (mutex_lock_interruptible(&card->open_mutex)) {
3275 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
3276 return -ERESTARTSYS;
3277 }
3278 }
3279
3280 file->private_data = card;
3281 DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
3282
3283 /* handle input from analog source */
3284 if (file->f_mode & FMODE_READ) {
3285 chan = &card->ch_in;
3286
3287 via_chan_init (card, chan);
3288
3289 /* why is this forced to 16-bit stereo in all drivers? */
3290 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3291 chan->channels = 2;
3292
3293 // TO DO - use FIFO: via_capture_fifo(card, 1);
3294 via_chan_pcm_fmt (chan, 0);
3295 via_set_rate (card->ac97, chan, 44100);
3296 }
3297
3298 /* handle output to analog source */
3299 if (file->f_mode & FMODE_WRITE) {
3300 chan = &card->ch_out;
3301
3302 via_chan_init (card, chan);
3303
3304 if (file->f_mode & FMODE_READ) {
3305 /* if in duplex mode make the recording and playback channels
3306 have the same settings */
3307 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3308 chan->channels = 2;
3309 via_chan_pcm_fmt (chan, 0);
3310 via_set_rate (card->ac97, chan, 44100);
3311 } else {
3312 if ((minor & 0xf) == SND_DEV_DSP16) {
3313 chan->pcm_fmt = VIA_PCM_FMT_16BIT;
3314 via_chan_pcm_fmt (chan, 0);
3315 via_set_rate (card->ac97, chan, 44100);
3316 } else {
3317 via_chan_pcm_fmt (chan, 1);
3318 via_set_rate (card->ac97, chan, 8000);
3319 }
3320 }
3321 }
3322
3323 DPRINTK ("EXIT, returning 0\n");
3324 return nonseekable_open(inode, file);
3325 }
3326
3327
3328 static int via_dsp_release(struct inode *inode, struct file *file)
3329 {
3330 struct via_info *card;
3331 int nonblock = (file->f_flags & O_NONBLOCK);
3332 int rc;
3333
3334 DPRINTK ("ENTER\n");
3335
3336 assert (file != NULL);
3337 card = file->private_data;
3338 assert (card != NULL);
3339
3340 rc = via_syscall_down (card, nonblock);
3341 if (rc) {
3342 DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc);
3343 return rc;
3344 }
3345
3346 if (file->f_mode & FMODE_WRITE) {
3347 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3348 if (rc && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */
3349 printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
3350
3351 via_chan_free (card, &card->ch_out);
3352 via_chan_buffer_free(card, &card->ch_out);
3353 }
3354
3355 if (file->f_mode & FMODE_READ) {
3356 via_chan_free (card, &card->ch_in);
3357 via_chan_buffer_free (card, &card->ch_in);
3358 }
3359
3360 mutex_unlock(&card->syscall_mutex);
3361 mutex_unlock(&card->open_mutex);
3362
3363 DPRINTK ("EXIT, returning 0\n");
3364 return 0;
3365 }
3366
3367
3368 /****************************************************************
3369 *
3370 * Chip setup and kernel registration
3371 *
3372 *
3373 */
3374
3375 static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
3376 {
3377 #ifdef CONFIG_MIDI_VIA82CXXX
3378 u8 r42;
3379 #endif
3380 int rc;
3381 struct via_info *card;
3382 static int printed_version;
3383
3384 DPRINTK ("ENTER\n");
3385
3386 if (printed_version++ == 0)
3387 printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n");
3388
3389 rc = pci_enable_device (pdev);
3390 if (rc)
3391 goto err_out;
3392
3393 rc = pci_request_regions (pdev, "via82cxxx_audio");
3394 if (rc)
3395 goto err_out_disable;
3396
3397 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3398 if (rc)
3399 goto err_out_res;
3400 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3401 if (rc)
3402 goto err_out_res;
3403
3404 card = kmalloc (sizeof (*card), GFP_KERNEL);
3405 if (!card) {
3406 printk (KERN_ERR PFX "out of memory, aborting\n");
3407 rc = -ENOMEM;
3408 goto err_out_res;
3409 }
3410
3411 pci_set_drvdata (pdev, card);
3412
3413 memset (card, 0, sizeof (*card));
3414 card->pdev = pdev;
3415 card->baseaddr = pci_resource_start (pdev, 0);
3416 card->card_num = via_num_cards++;
3417 spin_lock_init (&card->lock);
3418 spin_lock_init (&card->ac97_lock);
3419 mutex_init(&card->syscall_mutex);
3420 mutex_init(&card->open_mutex);
3421
3422 /* we must init these now, in case the intr handler needs them */
3423 via_chan_init_defaults (card, &card->ch_out);
3424 via_chan_init_defaults (card, &card->ch_in);
3425 via_chan_init_defaults (card, &card->ch_fm);
3426
3427 /* if BAR 2 is present, chip is Rev H or later,
3428 * which means it has a few extra features */
3429 if (pci_resource_start (pdev, 2) > 0)
3430 card->rev_h = 1;
3431
3432 /* Overkill for now, but more flexible done right */
3433
3434 card->intmask = id->driver_data;
3435 card->legacy = !card->intmask;
3436 card->sixchannel = id->driver_data;
3437
3438 if(card->sixchannel)
3439 printk(KERN_INFO PFX "Six channel audio available\n");
3440 if (pdev->irq < 1) {
3441 printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq);
3442 rc = -ENODEV;
3443 goto err_out_kfree;
3444 }
3445
3446 if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) {
3447 printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n");
3448 rc = -ENODEV;
3449 goto err_out_kfree;
3450 }
3451
3452 pci_set_master(pdev);
3453
3454 /*
3455 * init AC97 mixer and codec
3456 */
3457 rc = via_ac97_init (card);
3458 if (rc) {
3459 printk (KERN_ERR PFX "AC97 init failed, aborting\n");
3460 goto err_out_kfree;
3461 }
3462
3463 /*
3464 * init DSP device
3465 */
3466 rc = via_dsp_init (card);
3467 if (rc) {
3468 printk (KERN_ERR PFX "DSP device init failed, aborting\n");
3469 goto err_out_have_mixer;
3470 }
3471
3472 /*
3473 * init and turn on interrupts, as the last thing we do
3474 */
3475 rc = via_interrupt_init (card);
3476 if (rc) {
3477 printk (KERN_ERR PFX "interrupt init failed, aborting\n");
3478 goto err_out_have_dsp;
3479 }
3480
3481 printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
3482 card->card_num + 1, card->baseaddr, pdev->irq);
3483
3484 #ifdef CONFIG_MIDI_VIA82CXXX
3485 /* Disable by default */
3486 card->midi_info.io_base = 0;
3487
3488 if(card->legacy)
3489 {
3490 pci_read_config_byte (pdev, 0x42, &r42);
3491 /* Disable MIDI interrupt */
3492 pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK);
3493 if (r42 & VIA_CR42_MIDI_ENABLE)
3494 {
3495 if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */
3496 card->midi_info.io_base = pci_resource_start (pdev, 2);
3497 else /* Address selected by byte 0x43 */
3498 {
3499 u8 r43;
3500 pci_read_config_byte (pdev, 0x43, &r43);
3501 card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2);
3502 }
3503
3504 card->midi_info.irq = -pdev->irq;
3505 if (probe_uart401(& card->midi_info, THIS_MODULE))
3506 {
3507 card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc;
3508 pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK);
3509 printk("Enabled Via MIDI\n");
3510 }
3511 }
3512 }
3513 #endif
3514
3515 DPRINTK ("EXIT, returning 0\n");
3516 return 0;
3517
3518 err_out_have_dsp:
3519 via_dsp_cleanup (card);
3520
3521 err_out_have_mixer:
3522 via_ac97_cleanup (card);
3523
3524 err_out_kfree:
3525 #ifndef VIA_NDEBUG
3526 memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
3527 #endif
3528 kfree (card);
3529
3530 err_out_res:
3531 pci_release_regions (pdev);
3532
3533 err_out_disable:
3534 pci_disable_device (pdev);
3535
3536 err_out:
3537 pci_set_drvdata (pdev, NULL);
3538 DPRINTK ("EXIT - returning %d\n", rc);
3539 return rc;
3540 }
3541
3542
3543 static void __devexit via_remove_one (struct pci_dev *pdev)
3544 {
3545 struct via_info *card;
3546
3547 DPRINTK ("ENTER\n");
3548
3549 assert (pdev != NULL);
3550 card = pci_get_drvdata (pdev);
3551 assert (card != NULL);
3552
3553 #ifdef CONFIG_MIDI_VIA82CXXX
3554 if (card->midi_info.io_base)
3555 unload_uart401(&card->midi_info);
3556 #endif
3557
3558 free_irq (card->pdev->irq, card);
3559 via_dsp_cleanup (card);
3560 via_ac97_cleanup (card);
3561
3562 #ifndef VIA_NDEBUG
3563 memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
3564 #endif
3565 kfree (card);
3566
3567 pci_set_drvdata (pdev, NULL);
3568
3569 pci_release_regions (pdev);
3570 pci_disable_device (pdev);
3571 pci_set_power_state (pdev, 3); /* ...zzzzzz */
3572
3573 DPRINTK ("EXIT\n");
3574 return;
3575 }
3576
3577
3578 /****************************************************************
3579 *
3580 * Driver initialization and cleanup
3581 *
3582 *
3583 */
3584
3585 static int __init init_via82cxxx_audio(void)
3586 {
3587 int rc;
3588
3589 DPRINTK ("ENTER\n");
3590
3591 rc = pci_register_driver (&via_driver);
3592 if (rc) {
3593 DPRINTK ("EXIT, returning %d\n", rc);
3594 return rc;
3595 }
3596
3597 DPRINTK ("EXIT, returning 0\n");
3598 return 0;
3599 }
3600
3601
3602 static void __exit cleanup_via82cxxx_audio(void)
3603 {
3604 DPRINTK ("ENTER\n");
3605
3606 pci_unregister_driver (&via_driver);
3607
3608 DPRINTK ("EXIT\n");
3609 }
3610
3611
3612 module_init(init_via82cxxx_audio);
3613 module_exit(cleanup_via82cxxx_audio);
3614
3615 MODULE_AUTHOR("Jeff Garzik");
3616 MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
3617 MODULE_LICENSE("GPL");
3618
Support for the Chinese Samsung S3C2440 based development boards