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NFSv4: Ensure non-root user can trigger a referral automount
[linux-2.6/mini2440.git] / sound / oss / via82cxxx_audio.c
blobc96cc8c68b3bec1135aefc7fd7e6c370c540121d
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/smp_lock.h>
36 #include <linux/ioport.h>
37 #include <linux/delay.h>
38 #include <linux/dma-mapping.h>
39 #include <asm/io.h>
40 #include <asm/uaccess.h>
41 #include <linux/mutex.h>
42
43 #include "sound_config.h"
44 #include "dev_table.h"
45 #include "mpu401.h"
46
47
48 #undef VIA_DEBUG /* define to enable debugging output and checks */
49 #ifdef VIA_DEBUG
50 /* note: prints function name for you */
51 #define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
52 #else
53 #define DPRINTK(fmt, args...)
54 #endif
55
56 #undef VIA_NDEBUG /* define to disable lightweight runtime checks */
57 #ifdef VIA_NDEBUG
58 #define assert(expr)
59 #else
60 #define assert(expr) \
61 if(!(expr)) { \
62 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
63 #expr,__FILE__,__FUNCTION__,__LINE__); \
64 }
65 #endif
66
67 #define VIA_SUPPORT_MMAP 1 /* buggy, for now... */
68
69 #define MAX_CARDS 1
70
71 #define VIA_CARD_NAME "VIA 82Cxxx Audio driver " VIA_VERSION
72 #define VIA_MODULE_NAME "via82cxxx"
73 #define PFX VIA_MODULE_NAME ": "
74
75 #define VIA_COUNTER_LIMIT 100000
76
77 /* size of DMA buffers */
78 #define VIA_MAX_BUFFER_DMA_PAGES 32
79
80 /* buffering default values in ms */
81 #define VIA_DEFAULT_FRAG_TIME 20
82 #define VIA_DEFAULT_BUFFER_TIME 500
83
84 /* the hardware has a 256 fragment limit */
85 #define VIA_MIN_FRAG_NUMBER 2
86 #define VIA_MAX_FRAG_NUMBER 128
87
88 #define VIA_MAX_FRAG_SIZE PAGE_SIZE
89 #define VIA_MIN_FRAG_SIZE (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE / VIA_MAX_FRAG_NUMBER)
90
91
92 /* 82C686 function 5 (audio codec) PCI configuration registers */
93 #define VIA_ACLINK_STATUS 0x40
94 #define VIA_ACLINK_CTRL 0x41
95 #define VIA_FUNC_ENABLE 0x42
96 #define VIA_PNP_CONTROL 0x43
97 #define VIA_FM_NMI_CTRL 0x48
98
99 /*
100 * controller base 0 (scatter-gather) registers
101 *
102 * NOTE: Via datasheet lists first channel as "read"
103 * channel and second channel as "write" channel.
104 * I changed the naming of the constants to be more
105 * clear than I felt the datasheet to be.
106 */
107
108 #define VIA_BASE0_PCM_OUT_CHAN 0x00 /* output PCM to user */
109 #define VIA_BASE0_PCM_OUT_CHAN_STATUS 0x00
110 #define VIA_BASE0_PCM_OUT_CHAN_CTRL 0x01
111 #define VIA_BASE0_PCM_OUT_CHAN_TYPE 0x02
112
113 #define VIA_BASE0_PCM_IN_CHAN 0x10 /* input PCM from user */
114 #define VIA_BASE0_PCM_IN_CHAN_STATUS 0x10
115 #define VIA_BASE0_PCM_IN_CHAN_CTRL 0x11
116 #define VIA_BASE0_PCM_IN_CHAN_TYPE 0x12
117
118 /* offsets from base */
119 #define VIA_PCM_STATUS 0x00
120 #define VIA_PCM_CONTROL 0x01
121 #define VIA_PCM_TYPE 0x02
122 #define VIA_PCM_LEFTVOL 0x02
123 #define VIA_PCM_RIGHTVOL 0x03
124 #define VIA_PCM_TABLE_ADDR 0x04
125 #define VIA_PCM_STOPRATE 0x08 /* 8233+ */
126 #define VIA_PCM_BLOCK_COUNT 0x0C
127
128 /* XXX unused DMA channel for FM PCM data */
129 #define VIA_BASE0_FM_OUT_CHAN 0x20
130 #define VIA_BASE0_FM_OUT_CHAN_STATUS 0x20
131 #define VIA_BASE0_FM_OUT_CHAN_CTRL 0x21
132 #define VIA_BASE0_FM_OUT_CHAN_TYPE 0x22
133
134 /* Six channel audio output on 8233 */
135 #define VIA_BASE0_MULTI_OUT_CHAN 0x40
136 #define VIA_BASE0_MULTI_OUT_CHAN_STATUS 0x40
137 #define VIA_BASE0_MULTI_OUT_CHAN_CTRL 0x41
138 #define VIA_BASE0_MULTI_OUT_CHAN_TYPE 0x42
139
140 #define VIA_BASE0_AC97_CTRL 0x80
141 #define VIA_BASE0_SGD_STATUS_SHADOW 0x84
142 #define VIA_BASE0_GPI_INT_ENABLE 0x8C
143 #define VIA_INTR_OUT ((1<<0) | (1<<4) | (1<<8))
144 #define VIA_INTR_IN ((1<<1) | (1<<5) | (1<<9))
145 #define VIA_INTR_FM ((1<<2) | (1<<6) | (1<<10))
146 #define VIA_INTR_MASK (VIA_INTR_OUT | VIA_INTR_IN | VIA_INTR_FM)
147
148 /* Newer VIA we need to monitor the low 3 bits of each channel. This
149 mask covers the channels we don't yet use as well
150 */
151
152 #define VIA_NEW_INTR_MASK 0x77077777UL
153
154 /* VIA_BASE0_AUDIO_xxx_CHAN_TYPE bits */
155 #define VIA_IRQ_ON_FLAG (1<<0) /* int on each flagged scatter block */
156 #define VIA_IRQ_ON_EOL (1<<1) /* int at end of scatter list */
157 #define VIA_INT_SEL_PCI_LAST_LINE_READ (0) /* int at PCI read of last line */
158 #define VIA_INT_SEL_LAST_SAMPLE_SENT (1<<2) /* int at last sample sent */
159 #define VIA_INT_SEL_ONE_LINE_LEFT (1<<3) /* int at less than one line to send */
160 #define VIA_PCM_FMT_STEREO (1<<4) /* PCM stereo format (bit clear == mono) */
161 #define VIA_PCM_FMT_16BIT (1<<5) /* PCM 16-bit format (bit clear == 8-bit) */
162 #define VIA_PCM_REC_FIFO (1<<6) /* PCM Recording FIFO */
163 #define VIA_RESTART_SGD_ON_EOL (1<<7) /* restart scatter-gather at EOL */
164 #define VIA_PCM_FMT_MASK (VIA_PCM_FMT_STEREO|VIA_PCM_FMT_16BIT)
165 #define VIA_CHAN_TYPE_MASK (VIA_RESTART_SGD_ON_EOL | \
166 VIA_IRQ_ON_FLAG | \
167 VIA_IRQ_ON_EOL)
168 #define VIA_CHAN_TYPE_INT_SELECT (VIA_INT_SEL_LAST_SAMPLE_SENT)
169
170 /* PCI configuration register bits and masks */
171 #define VIA_CR40_AC97_READY 0x01
172 #define VIA_CR40_AC97_LOW_POWER 0x02
173 #define VIA_CR40_SECONDARY_READY 0x04
174
175 #define VIA_CR41_AC97_ENABLE 0x80 /* enable AC97 codec */
176 #define VIA_CR41_AC97_RESET 0x40 /* clear bit to reset AC97 */
177 #define VIA_CR41_AC97_WAKEUP 0x20 /* wake up from power-down mode */
178 #define VIA_CR41_AC97_SDO 0x10 /* force Serial Data Out (SDO) high */
179 #define VIA_CR41_VRA 0x08 /* enable variable sample rate */
180 #define VIA_CR41_PCM_ENABLE 0x04 /* AC Link SGD Read Channel PCM Data Output */
181 #define VIA_CR41_FM_PCM_ENABLE 0x02 /* AC Link FM Channel PCM Data Out */
182 #define VIA_CR41_SB_PCM_ENABLE 0x01 /* AC Link SB PCM Data Output */
183 #define VIA_CR41_BOOT_MASK (VIA_CR41_AC97_ENABLE | \
184 VIA_CR41_AC97_WAKEUP | \
185 VIA_CR41_AC97_SDO)
186 #define VIA_CR41_RUN_MASK (VIA_CR41_AC97_ENABLE | \
187 VIA_CR41_AC97_RESET | \
188 VIA_CR41_VRA | \
189 VIA_CR41_PCM_ENABLE)
190
191 #define VIA_CR42_SB_ENABLE 0x01
192 #define VIA_CR42_MIDI_ENABLE 0x02
193 #define VIA_CR42_FM_ENABLE 0x04
194 #define VIA_CR42_GAME_ENABLE 0x08
195 #define VIA_CR42_MIDI_IRQMASK 0x40
196 #define VIA_CR42_MIDI_PNP 0x80
197
198 #define VIA_CR44_SECOND_CODEC_SUPPORT (1 << 6)
199 #define VIA_CR44_AC_LINK_ACCESS (1 << 7)
200
201 #define VIA_CR48_FM_TRAP_TO_NMI (1 << 2)
202
203 /* controller base 0 register bitmasks */
204 #define VIA_INT_DISABLE_MASK (~(0x01|0x02))
205 #define VIA_SGD_STOPPED (1 << 2)
206 #define VIA_SGD_PAUSED (1 << 6)
207 #define VIA_SGD_ACTIVE (1 << 7)
208 #define VIA_SGD_TERMINATE (1 << 6)
209 #define VIA_SGD_FLAG (1 << 0)
210 #define VIA_SGD_EOL (1 << 1)
211 #define VIA_SGD_START (1 << 7)
212
213 #define VIA_CR80_FIRST_CODEC 0
214 #define VIA_CR80_SECOND_CODEC (1 << 30)
215 #define VIA_CR80_FIRST_CODEC_VALID (1 << 25)
216 #define VIA_CR80_VALID (1 << 25)
217 #define VIA_CR80_SECOND_CODEC_VALID (1 << 27)
218 #define VIA_CR80_BUSY (1 << 24)
219 #define VIA_CR83_BUSY (1)
220 #define VIA_CR83_FIRST_CODEC_VALID (1 << 1)
221 #define VIA_CR80_READ (1 << 23)
222 #define VIA_CR80_WRITE_MODE 0
223 #define VIA_CR80_REG_IDX(idx) ((((idx) & 0xFF) >> 1) << 16)
224
225 /* capabilities we announce */
226 #ifdef VIA_SUPPORT_MMAP
227 #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | DSP_CAP_MMAP | \
228 DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
229 #else
230 #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | \
231 DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
232 #endif
233
234 /* scatter-gather DMA table entry, exactly as passed to hardware */
235 struct via_sgd_table {
236 u32 addr;
237 u32 count; /* includes additional VIA_xxx bits also */
238 };
239
240 #define VIA_EOL (1 << 31)
241 #define VIA_FLAG (1 << 30)
242 #define VIA_STOP (1 << 29)
243
244
245 enum via_channel_states {
246 sgd_stopped = 0,
247 sgd_in_progress = 1,
248 };
249
250
251 struct via_buffer_pgtbl {
252 dma_addr_t handle;
253 void *cpuaddr;
254 };
255
256
257 struct via_channel {
258 atomic_t n_frags;
259 atomic_t hw_ptr;
260 wait_queue_head_t wait;
261
262 unsigned int sw_ptr;
263 unsigned int slop_len;
264 unsigned int n_irqs;
265 int bytes;
266
267 unsigned is_active : 1;
268 unsigned is_record : 1;
269 unsigned is_mapped : 1;
270 unsigned is_enabled : 1;
271 unsigned is_multi: 1; /* 8233 6 channel */
272 u8 pcm_fmt; /* VIA_PCM_FMT_xxx */
273 u8 channels; /* Channel count */
274
275 unsigned rate; /* sample rate */
276 unsigned int frag_size;
277 unsigned int frag_number;
278
279 unsigned char intmask;
280
281 volatile struct via_sgd_table *sgtable;
282 dma_addr_t sgt_handle;
283
284 unsigned int page_number;
285 struct via_buffer_pgtbl pgtbl[VIA_MAX_BUFFER_DMA_PAGES];
286
287 long iobase;
288
289 const char *name;
290 };
291
292
293 /* data stored for each chip */
294 struct via_info {
295 struct pci_dev *pdev;
296 long baseaddr;
297
298 struct ac97_codec *ac97;
299 spinlock_t ac97_lock;
300 spinlock_t lock;
301 int card_num; /* unique card number, from 0 */
302
303 int dev_dsp; /* /dev/dsp index from register_sound_dsp() */
304
305 unsigned rev_h : 1;
306 unsigned legacy: 1; /* Has legacy ports */
307 unsigned intmask: 1; /* Needs int bits */
308 unsigned sixchannel: 1; /* 8233/35 with 6 channel support */
309 unsigned volume: 1;
310
311 unsigned locked_rate : 1;
312
313 int mixer_vol; /* 8233/35 volume - not yet implemented */
314
315 struct mutex syscall_mutex;
316 struct mutex open_mutex;
317
318 /* The 8233/8235 have 4 DX audio channels, two record and
319 one six channel out. We bind ch_in to DX 1, ch_out to multichannel
320 and ch_fm to DX 2. DX 3 and REC0/REC1 are unused at the
321 moment */
322
323 struct via_channel ch_in;
324 struct via_channel ch_out;
325 struct via_channel ch_fm;
326
327 #ifdef CONFIG_MIDI_VIA82CXXX
328 void *midi_devc;
329 struct address_info midi_info;
330 #endif
331 };
332
333
334 /* number of cards, used for assigning unique numbers to cards */
335 static unsigned via_num_cards;
336
337
338
339 /****************************************************************
340 *
341 * prototypes
342 *
343 *
344 */
345
346 static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id);
347 static void __devexit via_remove_one (struct pci_dev *pdev);
348
349 static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos);
350 static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos);
351 static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait);
352 static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
353 static int via_dsp_open (struct inode *inode, struct file *file);
354 static int via_dsp_release(struct inode *inode, struct file *file);
355 static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma);
356
357 static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg);
358 static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value);
359 static u8 via_ac97_wait_idle (struct via_info *card);
360
361 static void via_chan_free (struct via_info *card, struct via_channel *chan);
362 static void via_chan_clear (struct via_info *card, struct via_channel *chan);
363 static void via_chan_pcm_fmt (struct via_channel *chan, int reset);
364 static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan);
365
366
367 /****************************************************************
368 *
369 * Various data the driver needs
370 *
371 *
372 */
373
374
375 static struct pci_device_id via_pci_tbl[] = {
376 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
377 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
378 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_5,
379 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
380 { 0, }
381 };
382 MODULE_DEVICE_TABLE(pci,via_pci_tbl);
383
384
385 static struct pci_driver via_driver = {
386 .name = VIA_MODULE_NAME,
387 .id_table = via_pci_tbl,
388 .probe = via_init_one,
389 .remove = __devexit_p(via_remove_one),
390 };
391
392
393 /****************************************************************
394 *
395 * Low-level base 0 register read/write helpers
396 *
397 *
398 */
399
400 /**
401 * via_chan_stop - Terminate DMA on specified PCM channel
402 * @iobase: PCI base address for SGD channel registers
403 *
404 * Terminate scatter-gather DMA operation for given
405 * channel (derived from @iobase), if DMA is active.
406 *
407 * Note that @iobase is not the PCI base address,
408 * but the PCI base address plus an offset to
409 * one of three PCM channels supported by the chip.
410 *
411 */
412
413 static inline void via_chan_stop (long iobase)
414 {
415 if (inb (iobase + VIA_PCM_STATUS) & VIA_SGD_ACTIVE)
416 outb (VIA_SGD_TERMINATE, iobase + VIA_PCM_CONTROL);
417 }
418
419
420 /**
421 * via_chan_status_clear - Clear status flags on specified DMA channel
422 * @iobase: PCI base address for SGD channel registers
423 *
424 * Clear any pending status flags for the given
425 * DMA channel (derived from @iobase), if any
426 * flags are asserted.
427 *
428 * Note that @iobase is not the PCI base address,
429 * but the PCI base address plus an offset to
430 * one of three PCM channels supported by the chip.
431 *
432 */
433
434 static inline void via_chan_status_clear (long iobase)
435 {
436 u8 tmp = inb (iobase + VIA_PCM_STATUS);
437
438 if (tmp != 0)
439 outb (tmp, iobase + VIA_PCM_STATUS);
440 }
441
442
443 /**
444 * sg_begin - Begin recording or playback on a PCM channel
445 * @chan: Channel for which DMA operation shall begin
446 *
447 * Start scatter-gather DMA for the given channel.
448 *
449 */
450
451 static inline void sg_begin (struct via_channel *chan)
452 {
453 DPRINTK("Start with intmask %d\n", chan->intmask);
454 DPRINTK("About to start from %d to %d\n",
455 inl(chan->iobase + VIA_PCM_BLOCK_COUNT),
456 inb(chan->iobase + VIA_PCM_STOPRATE + 3));
457 outb (VIA_SGD_START|chan->intmask, chan->iobase + VIA_PCM_CONTROL);
458 DPRINTK("Status is now %02X\n", inb(chan->iobase + VIA_PCM_STATUS));
459 DPRINTK("Control is now %02X\n", inb(chan->iobase + VIA_PCM_CONTROL));
460 }
461
462
463 static int sg_active (long iobase)
464 {
465 u8 tmp = inb (iobase + VIA_PCM_STATUS);
466 if ((tmp & VIA_SGD_STOPPED) || (tmp & VIA_SGD_PAUSED)) {
467 printk(KERN_WARNING "via82cxxx warning: SG stopped or paused\n");
468 return 0;
469 }
470 if (tmp & VIA_SGD_ACTIVE)
471 return 1;
472 return 0;
473 }
474
475 static int via_sg_offset(struct via_channel *chan)
476 {
477 return inl (chan->iobase + VIA_PCM_BLOCK_COUNT) & 0x00FFFFFF;
478 }
479
480 /****************************************************************
481 *
482 * Miscellaneous debris
483 *
484 *
485 */
486
487
488 /**
489 * via_syscall_down - down the card-specific syscell semaphore
490 * @card: Private info for specified board
491 * @nonblock: boolean, non-zero if O_NONBLOCK is set
492 *
493 * Encapsulates standard method of acquiring the syscall sem.
494 *
495 * Returns negative errno on error, or zero for success.
496 */
497
498 static inline int via_syscall_down (struct via_info *card, int nonblock)
499 {
500 /* Thomas Sailer:
501 * EAGAIN is supposed to be used if IO is pending,
502 * not if there is contention on some internal
503 * synchronization primitive which should be
504 * held only for a short time anyway
505 */
506 nonblock = 0;
507
508 if (nonblock) {
509 if (!mutex_trylock(&card->syscall_mutex))
510 return -EAGAIN;
511 } else {
512 if (mutex_lock_interruptible(&card->syscall_mutex))
513 return -ERESTARTSYS;
514 }
515
516 return 0;
517 }
518
519
520 /**
521 * via_stop_everything - Stop all audio operations
522 * @card: Private info for specified board
523 *
524 * Stops all DMA operations and interrupts, and clear
525 * any pending status bits resulting from those operations.
526 */
527
528 static void via_stop_everything (struct via_info *card)
529 {
530 u8 tmp, new_tmp;
531
532 DPRINTK ("ENTER\n");
533
534 assert (card != NULL);
535
536 /*
537 * terminate any existing operations on audio read/write channels
538 */
539 via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
540 via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
541 via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
542 if(card->sixchannel)
543 via_chan_stop (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
544
545 /*
546 * clear any existing stops / flags (sanity check mainly)
547 */
548 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
549 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
550 via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
551 if(card->sixchannel)
552 via_chan_status_clear (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
553
554 /*
555 * clear any enabled interrupt bits
556 */
557 tmp = inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
558 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
559 if (tmp != new_tmp)
560 outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
561
562 tmp = inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
563 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
564 if (tmp != new_tmp)
565 outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
566
567 tmp = inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
568 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
569 if (tmp != new_tmp)
570 outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
571
572 if(card->sixchannel)
573 {
574 tmp = inb (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
575 new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
576 if (tmp != new_tmp)
577 outb (0, card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
578 }
579
580 udelay(10);
581
582 /*
583 * clear any existing flags
584 */
585 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
586 via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
587 via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
588
589 DPRINTK ("EXIT\n");
590 }
591
592
593 /**
594 * via_set_rate - Set PCM rate for given channel
595 * @ac97: Pointer to generic codec info struct
596 * @chan: Private info for specified channel
597 * @rate: Desired PCM sample rate, in Khz
598 *
599 * Sets the PCM sample rate for a channel.
600 *
601 * Values for @rate are clamped to a range of 4000 Khz through 48000 Khz,
602 * due to hardware constraints.
603 */
604
605 static int via_set_rate (struct ac97_codec *ac97,
606 struct via_channel *chan, unsigned rate)
607 {
608 struct via_info *card = ac97->private_data;
609 int rate_reg;
610 u32 dacp;
611 u32 mast_vol, phone_vol, mono_vol, pcm_vol;
612 u32 mute_vol = 0x8000; /* The mute volume? -- Seems to work! */
613
614 DPRINTK ("ENTER, rate = %d\n", rate);
615
616 if (chan->rate == rate)
617 goto out;
618 if (card->locked_rate) {
619 chan->rate = 48000;
620 goto out;
621 }
622
623 if (rate > 48000) rate = 48000;
624 if (rate < 4000) rate = 4000;
625
626 rate_reg = chan->is_record ? AC97_PCM_LR_ADC_RATE :
627 AC97_PCM_FRONT_DAC_RATE;
628
629 /* Save current state */
630 dacp=via_ac97_read_reg(ac97, AC97_POWER_CONTROL);
631 mast_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_STEREO);
632 mono_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_MONO);
633 phone_vol = via_ac97_read_reg(ac97, AC97_HEADPHONE_VOL);
634 pcm_vol = via_ac97_read_reg(ac97, AC97_PCMOUT_VOL);
635 /* Mute - largely reduces popping */
636 via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mute_vol);
637 via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mute_vol);
638 via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, mute_vol);
639 via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, mute_vol);
640 /* Power down the DAC */
641 via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp|0x0200);
642
643 /* Set new rate */
644 via_ac97_write_reg (ac97, rate_reg, rate);
645
646 /* Power DAC back up */
647 via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp);
648 udelay (200); /* reduces popping */
649
650 /* Restore volumes */
651 via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mast_vol);
652 via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mono_vol);
653 via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, phone_vol);
654 via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, pcm_vol);
655
656 /* the hardware might return a value different than what we
657 * passed to it, so read the rate value back from hardware
658 * to see what we came up with
659 */
660 chan->rate = via_ac97_read_reg (ac97, rate_reg);
661
662 if (chan->rate == 0) {
663 card->locked_rate = 1;
664 chan->rate = 48000;
665 printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
666 }
667
668 out:
669 DPRINTK ("EXIT, returning rate %d Hz\n", chan->rate);
670 return chan->rate;
671 }
672
673
674 /****************************************************************
675 *
676 * Channel-specific operations
677 *
678 *
679 */
680
681
682 /**
683 * via_chan_init_defaults - Initialize a struct via_channel
684 * @card: Private audio chip info
685 * @chan: Channel to be initialized
686 *
687 * Zero @chan, and then set all static defaults for the structure.
688 */
689
690 static void via_chan_init_defaults (struct via_info *card, struct via_channel *chan)
691 {
692 memset (chan, 0, sizeof (*chan));
693
694 if(card->intmask)
695 chan->intmask = 0x23; /* Turn on the IRQ bits */
696
697 if (chan == &card->ch_out) {
698 chan->name = "PCM-OUT";
699 if(card->sixchannel)
700 {
701 chan->iobase = card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN;
702 chan->is_multi = 1;
703 DPRINTK("Using multichannel for pcm out\n");
704 }
705 else
706 chan->iobase = card->baseaddr + VIA_BASE0_PCM_OUT_CHAN;
707 } else if (chan == &card->ch_in) {
708 chan->name = "PCM-IN";
709 chan->iobase = card->baseaddr + VIA_BASE0_PCM_IN_CHAN;
710 chan->is_record = 1;
711 } else if (chan == &card->ch_fm) {
712 chan->name = "PCM-OUT-FM";
713 chan->iobase = card->baseaddr + VIA_BASE0_FM_OUT_CHAN;
714 } else {
715 BUG();
716 }
717
718 init_waitqueue_head (&chan->wait);
719
720 chan->pcm_fmt = VIA_PCM_FMT_MASK;
721 chan->is_enabled = 1;
722
723 chan->frag_number = 0;
724 chan->frag_size = 0;
725 atomic_set(&chan->n_frags, 0);
726 atomic_set (&chan->hw_ptr, 0);
727 }
728
729 /**
730 * via_chan_init - Initialize PCM channel
731 * @card: Private audio chip info
732 * @chan: Channel to be initialized
733 *
734 * Performs some of the preparations necessary to begin
735 * using a PCM channel.
736 *
737 * Currently the preparations consist of
738 * setting the PCM channel to a known state.
739 */
740
741
742 static void via_chan_init (struct via_info *card, struct via_channel *chan)
743 {
744
745 DPRINTK ("ENTER\n");
746
747 /* bzero channel structure, and init members to defaults */
748 via_chan_init_defaults (card, chan);
749
750 /* stop any existing channel output */
751 via_chan_clear (card, chan);
752 via_chan_status_clear (chan->iobase);
753 via_chan_pcm_fmt (chan, 1);
754
755 DPRINTK ("EXIT\n");
756 }
757
758 /**
759 * via_chan_buffer_init - Initialize PCM channel buffer
760 * @card: Private audio chip info
761 * @chan: Channel to be initialized
762 *
763 * Performs some of the preparations necessary to begin
764 * using a PCM channel.
765 *
766 * Currently the preparations include allocating the
767 * scatter-gather DMA table and buffers,
768 * and passing the
769 * address of the DMA table to the hardware.
770 *
771 * Note that special care is taken when passing the
772 * DMA table address to hardware, because it was found
773 * during driver development that the hardware did not
774 * always "take" the address.
775 */
776
777 static int via_chan_buffer_init (struct via_info *card, struct via_channel *chan)
778 {
779 int page, offset;
780 int i;
781
782 DPRINTK ("ENTER\n");
783
784
785 chan->intmask = 0;
786 if(card->intmask)
787 chan->intmask = 0x23; /* Turn on the IRQ bits */
788
789 if (chan->sgtable != NULL) {
790 DPRINTK ("EXIT\n");
791 return 0;
792 }
793
794 /* alloc DMA-able memory for scatter-gather table */
795 chan->sgtable = pci_alloc_consistent (card->pdev,
796 (sizeof (struct via_sgd_table) * chan->frag_number),
797 &chan->sgt_handle);
798 if (!chan->sgtable) {
799 printk (KERN_ERR PFX "DMA table alloc fail, aborting\n");
800 DPRINTK ("EXIT\n");
801 return -ENOMEM;
802 }
803
804 memset ((void*)chan->sgtable, 0,
805 (sizeof (struct via_sgd_table) * chan->frag_number));
806
807 /* alloc DMA-able memory for scatter-gather buffers */
808
809 chan->page_number = (chan->frag_number * chan->frag_size) / PAGE_SIZE +
810 (((chan->frag_number * chan->frag_size) % PAGE_SIZE) ? 1 : 0);
811
812 for (i = 0; i < chan->page_number; i++) {
813 chan->pgtbl[i].cpuaddr = pci_alloc_consistent (card->pdev, PAGE_SIZE,
814 &chan->pgtbl[i].handle);
815
816 if (!chan->pgtbl[i].cpuaddr) {
817 chan->page_number = i;
818 goto err_out_nomem;
819 }
820
821 #ifndef VIA_NDEBUG
822 memset (chan->pgtbl[i].cpuaddr, 0xBC, chan->frag_size);
823 #endif
824
825 #if 1
826 DPRINTK ("dmabuf_pg #%d (h=%lx, v2p=%lx, a=%p)\n",
827 i, (long)chan->pgtbl[i].handle,
828 virt_to_phys(chan->pgtbl[i].cpuaddr),
829 chan->pgtbl[i].cpuaddr);
830 #endif
831 }
832
833 for (i = 0; i < chan->frag_number; i++) {
834
835 page = i / (PAGE_SIZE / chan->frag_size);
836 offset = (i % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
837
838 chan->sgtable[i].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
839 chan->sgtable[i].addr = cpu_to_le32 (chan->pgtbl[page].handle + offset);
840
841 #if 1
842 DPRINTK ("dmabuf #%d (32(h)=%lx)\n",
843 i,
844 (long)chan->sgtable[i].addr);
845 #endif
846 }
847
848 /* overwrite the last buffer information */
849 chan->sgtable[chan->frag_number - 1].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
850
851 /* set location of DMA-able scatter-gather info table */
852 DPRINTK ("outl (0x%X, 0x%04lX)\n",
853 chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
854
855 via_ac97_wait_idle (card);
856 outl (chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
857 udelay (20);
858 via_ac97_wait_idle (card);
859 /* load no rate adaption, stereo 16bit, set up ring slots */
860 if(card->sixchannel)
861 {
862 if(!chan->is_multi)
863 {
864 outl (0xFFFFF | (0x3 << 20) | (chan->frag_number << 24), chan->iobase + VIA_PCM_STOPRATE);
865 udelay (20);
866 via_ac97_wait_idle (card);
867 }
868 }
869
870 DPRINTK ("inl (0x%lX) = %x\n",
871 chan->iobase + VIA_PCM_TABLE_ADDR,
872 inl(chan->iobase + VIA_PCM_TABLE_ADDR));
873
874 DPRINTK ("EXIT\n");
875 return 0;
876
877 err_out_nomem:
878 printk (KERN_ERR PFX "DMA buffer alloc fail, aborting\n");
879 via_chan_buffer_free (card, chan);
880 DPRINTK ("EXIT\n");
881 return -ENOMEM;
882 }
883
884
885 /**
886 * via_chan_free - Release a PCM channel
887 * @card: Private audio chip info
888 * @chan: Channel to be released
889 *
890 * Performs all the functions necessary to clean up
891 * an initialized channel.
892 *
893 * Currently these functions include disabled any
894 * active DMA operations, setting the PCM channel
895 * back to a known state, and releasing any allocated
896 * sound buffers.
897 */
898
899 static void via_chan_free (struct via_info *card, struct via_channel *chan)
900 {
901 DPRINTK ("ENTER\n");
902
903 spin_lock_irq (&card->lock);
904
905 /* stop any existing channel output */
906 via_chan_status_clear (chan->iobase);
907 via_chan_stop (chan->iobase);
908 via_chan_status_clear (chan->iobase);
909
910 spin_unlock_irq (&card->lock);
911
912 synchronize_irq(card->pdev->irq);
913
914 DPRINTK ("EXIT\n");
915 }
916
917 static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan)
918 {
919 int i;
920
921 DPRINTK ("ENTER\n");
922
923 /* zero location of DMA-able scatter-gather info table */
924 via_ac97_wait_idle(card);
925 outl (0, chan->iobase + VIA_PCM_TABLE_ADDR);
926
927 for (i = 0; i < chan->page_number; i++)
928 if (chan->pgtbl[i].cpuaddr) {
929 pci_free_consistent (card->pdev, PAGE_SIZE,
930 chan->pgtbl[i].cpuaddr,
931 chan->pgtbl[i].handle);
932 chan->pgtbl[i].cpuaddr = NULL;
933 chan->pgtbl[i].handle = 0;
934 }
935
936 chan->page_number = 0;
937
938 if (chan->sgtable) {
939 pci_free_consistent (card->pdev,
940 (sizeof (struct via_sgd_table) * chan->frag_number),
941 (void*)chan->sgtable, chan->sgt_handle);
942 chan->sgtable = NULL;
943 }
944
945 DPRINTK ("EXIT\n");
946 }
947
948
949 /**
950 * via_chan_pcm_fmt - Update PCM channel settings
951 * @chan: Channel to be updated
952 * @reset: Boolean. If non-zero, channel will be reset
953 * to 8-bit mono mode.
954 *
955 * Stores the settings of the current PCM format,
956 * 8-bit or 16-bit, and mono/stereo, into the
957 * hardware settings for the specified channel.
958 * If @reset is non-zero, the channel is reset
959 * to 8-bit mono mode. Otherwise, the channel
960 * is set to the values stored in the channel
961 * information struct @chan.
962 */
963
964 static void via_chan_pcm_fmt (struct via_channel *chan, int reset)
965 {
966 DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n",
967 chan->pcm_fmt, reset ? "yes" : "no");
968
969 assert (chan != NULL);
970
971 if (reset)
972 {
973 /* reset to 8-bit mono mode */
974 chan->pcm_fmt = 0;
975 chan->channels = 1;
976 }
977
978 /* enable interrupts on FLAG and EOL */
979 chan->pcm_fmt |= VIA_CHAN_TYPE_MASK;
980
981 /* if we are recording, enable recording fifo bit */
982 if (chan->is_record)
983 chan->pcm_fmt |= VIA_PCM_REC_FIFO;
984 /* set interrupt select bits where applicable (PCM in & out channels) */
985 if (!chan->is_record)
986 chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT;
987
988 DPRINTK("SET FMT - %02x %02x\n", chan->intmask , chan->is_multi);
989
990 if(chan->intmask)
991 {
992 u32 m;
993
994 /*
995 * Channel 0x4 is up to 6 x 16bit and has to be
996 * programmed differently
997 */
998
999 if(chan->is_multi)
1000 {
1001 u8 c = 0;
1002
1003 /*
1004 * Load the type bit for num channels
1005 * and 8/16bit
1006 */
1007
1008 if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
1009 c = 1 << 7;
1010 if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
1011 c |= (2<<4);
1012 else
1013 c |= (1<<4);
1014
1015 outb(c, chan->iobase + VIA_PCM_TYPE);
1016
1017 /*
1018 * Set the channel steering
1019 * Mono
1020 * Channel 0 to slot 3
1021 * Channel 0 to slot 4
1022 * Stereo
1023 * Channel 0 to slot 3
1024 * Channel 1 to slot 4
1025 */
1026
1027 switch(chan->channels)
1028 {
1029 case 1:
1030 outl(0xFF000000 | (1<<0) | (1<<4) , chan->iobase + VIA_PCM_STOPRATE);
1031 break;
1032 case 2:
1033 outl(0xFF000000 | (1<<0) | (2<<4) , chan->iobase + VIA_PCM_STOPRATE);
1034 break;
1035 case 4:
1036 outl(0xFF000000 | (1<<0) | (2<<4) | (3<<8) | (4<<12), chan->iobase + VIA_PCM_STOPRATE);
1037 break;
1038 case 6:
1039 outl(0xFF000000 | (1<<0) | (2<<4) | (5<<8) | (6<<12) | (3<<16) | (4<<20), chan->iobase + VIA_PCM_STOPRATE);
1040 break;
1041 }
1042 }
1043 else
1044 {
1045 /*
1046 * New style, turn off channel volume
1047 * control, set bits in the right register
1048 */
1049 outb(0x0, chan->iobase + VIA_PCM_LEFTVOL);
1050 outb(0x0, chan->iobase + VIA_PCM_RIGHTVOL);
1051
1052 m = inl(chan->iobase + VIA_PCM_STOPRATE);
1053 m &= ~(3<<20);
1054 if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
1055 m |= (1 << 20);
1056 if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
1057 m |= (1 << 21);
1058 outl(m, chan->iobase + VIA_PCM_STOPRATE);
1059 }
1060 }
1061 else
1062 outb (chan->pcm_fmt, chan->iobase + VIA_PCM_TYPE);
1063
1064
1065 DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n",
1066 chan->pcm_fmt,
1067 inb (chan->iobase + VIA_PCM_TYPE));
1068 }
1069
1070
1071 /**
1072 * via_chan_clear - Stop DMA channel operation, and reset pointers
1073 * @card: the chip to accessed
1074 * @chan: Channel to be cleared
1075 *
1076 * Call via_chan_stop to halt DMA operations, and then resets
1077 * all software pointers which track DMA operation.
1078 */
1079
1080 static void via_chan_clear (struct via_info *card, struct via_channel *chan)
1081 {
1082 DPRINTK ("ENTER\n");
1083 via_chan_stop (chan->iobase);
1084 via_chan_buffer_free(card, chan);
1085 chan->is_active = 0;
1086 chan->is_mapped = 0;
1087 chan->is_enabled = 1;
1088 chan->slop_len = 0;
1089 chan->sw_ptr = 0;
1090 chan->n_irqs = 0;
1091 atomic_set (&chan->hw_ptr, 0);
1092 DPRINTK ("EXIT\n");
1093 }
1094
1095
1096 /**
1097 * via_chan_set_speed - Set PCM sample rate for given channel
1098 * @card: Private info for specified board
1099 * @chan: Channel whose sample rate will be adjusted
1100 * @val: New sample rate, in Khz
1101 *
1102 * Helper function for the %SNDCTL_DSP_SPEED ioctl. OSS semantics
1103 * demand that all audio operations halt (if they are not already
1104 * halted) when the %SNDCTL_DSP_SPEED is given.
1105 *
1106 * This function halts all audio operations for the given channel
1107 * @chan, and then calls via_set_rate to set the audio hardware
1108 * to the new rate.
1109 */
1110
1111 static int via_chan_set_speed (struct via_info *card,
1112 struct via_channel *chan, int val)
1113 {
1114 DPRINTK ("ENTER, requested rate = %d\n", val);
1115
1116 via_chan_clear (card, chan);
1117
1118 val = via_set_rate (card->ac97, chan, val);
1119
1120 DPRINTK ("EXIT, returning %d\n", val);
1121 return val;
1122 }
1123
1124
1125 /**
1126 * via_chan_set_fmt - Set PCM sample size for given channel
1127 * @card: Private info for specified board
1128 * @chan: Channel whose sample size will be adjusted
1129 * @val: New sample size, use the %AFMT_xxx constants
1130 *
1131 * Helper function for the %SNDCTL_DSP_SETFMT ioctl. OSS semantics
1132 * demand that all audio operations halt (if they are not already
1133 * halted) when the %SNDCTL_DSP_SETFMT is given.
1134 *
1135 * This function halts all audio operations for the given channel
1136 * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
1137 * to the new sample size, either 8-bit or 16-bit.
1138 */
1139
1140 static int via_chan_set_fmt (struct via_info *card,
1141 struct via_channel *chan, int val)
1142 {
1143 DPRINTK ("ENTER, val=%s\n",
1144 val == AFMT_U8 ? "AFMT_U8" :
1145 val == AFMT_S16_LE ? "AFMT_S16_LE" :
1146 "unknown");
1147
1148 via_chan_clear (card, chan);
1149
1150 assert (val != AFMT_QUERY); /* this case is handled elsewhere */
1151
1152 switch (val) {
1153 case AFMT_S16_LE:
1154 if ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) == 0) {
1155 chan->pcm_fmt |= VIA_PCM_FMT_16BIT;
1156 via_chan_pcm_fmt (chan, 0);
1157 }
1158 break;
1159
1160 case AFMT_U8:
1161 if (chan->pcm_fmt & VIA_PCM_FMT_16BIT) {
1162 chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT;
1163 via_chan_pcm_fmt (chan, 0);
1164 }
1165 break;
1166
1167 default:
1168 DPRINTK ("unknown AFMT: 0x%X\n", val);
1169 val = AFMT_S16_LE;
1170 }
1171
1172 DPRINTK ("EXIT\n");
1173 return val;
1174 }
1175
1176
1177 /**
1178 * via_chan_set_stereo - Enable or disable stereo for a DMA channel
1179 * @card: Private info for specified board
1180 * @chan: Channel whose stereo setting will be adjusted
1181 * @val: New sample size, use the %AFMT_xxx constants
1182 *
1183 * Helper function for the %SNDCTL_DSP_CHANNELS and %SNDCTL_DSP_STEREO ioctls. OSS semantics
1184 * demand that all audio operations halt (if they are not already
1185 * halted) when %SNDCTL_DSP_CHANNELS or SNDCTL_DSP_STEREO is given.
1186 *
1187 * This function halts all audio operations for the given channel
1188 * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
1189 * to enable or disable stereo.
1190 */
1191
1192 static int via_chan_set_stereo (struct via_info *card,
1193 struct via_channel *chan, int val)
1194 {
1195 DPRINTK ("ENTER, channels = %d\n", val);
1196
1197 via_chan_clear (card, chan);
1198
1199 switch (val) {
1200
1201 /* mono */
1202 case 1:
1203 chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO;
1204 chan->channels = 1;
1205 via_chan_pcm_fmt (chan, 0);
1206 break;
1207
1208 /* stereo */
1209 case 2:
1210 chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
1211 chan->channels = 2;
1212 via_chan_pcm_fmt (chan, 0);
1213 break;
1214
1215 case 4:
1216 case 6:
1217 if(chan->is_multi)
1218 {
1219 chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
1220 chan->channels = val;
1221 break;
1222 }
1223 /* unknown */
1224 default:
1225 val = -EINVAL;
1226 break;
1227 }
1228
1229 DPRINTK ("EXIT, returning %d\n", val);
1230 return val;
1231 }
1232
1233 static int via_chan_set_buffering (struct via_info *card,
1234 struct via_channel *chan, int val)
1235 {
1236 int shift;
1237
1238 DPRINTK ("ENTER\n");
1239
1240 /* in both cases the buffer cannot be changed */
1241 if (chan->is_active || chan->is_mapped) {
1242 DPRINTK ("EXIT\n");
1243 return -EINVAL;
1244 }
1245
1246 /* called outside SETFRAGMENT */
1247 /* set defaults or do nothing */
1248 if (val < 0) {
1249
1250 if (chan->frag_size && chan->frag_number)
1251 goto out;
1252
1253 DPRINTK ("\n");
1254
1255 chan->frag_size = (VIA_DEFAULT_FRAG_TIME * chan->rate * chan->channels
1256 * ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) ? 2 : 1)) / 1000 - 1;
1257
1258 shift = 0;
1259 while (chan->frag_size) {
1260 chan->frag_size >>= 1;
1261 shift++;
1262 }
1263 chan->frag_size = 1 << shift;
1264
1265 chan->frag_number = (VIA_DEFAULT_BUFFER_TIME / VIA_DEFAULT_FRAG_TIME);
1266
1267 DPRINTK ("setting default values %d %d\n", chan->frag_size, chan->frag_number);
1268 } else {
1269 chan->frag_size = 1 << (val & 0xFFFF);
1270 chan->frag_number = (val >> 16) & 0xFFFF;
1271
1272 DPRINTK ("using user values %d %d\n", chan->frag_size, chan->frag_number);
1273 }
1274
1275 /* quake3 wants frag_number to be a power of two */
1276 shift = 0;
1277 while (chan->frag_number) {
1278 chan->frag_number >>= 1;
1279 shift++;
1280 }
1281 chan->frag_number = 1 << shift;
1282
1283 if (chan->frag_size > VIA_MAX_FRAG_SIZE)
1284 chan->frag_size = VIA_MAX_FRAG_SIZE;
1285 else if (chan->frag_size < VIA_MIN_FRAG_SIZE)
1286 chan->frag_size = VIA_MIN_FRAG_SIZE;
1287
1288 if (chan->frag_number < VIA_MIN_FRAG_NUMBER)
1289 chan->frag_number = VIA_MIN_FRAG_NUMBER;
1290 if (chan->frag_number > VIA_MAX_FRAG_NUMBER)
1291 chan->frag_number = VIA_MAX_FRAG_NUMBER;
1292
1293 if ((chan->frag_number * chan->frag_size) / PAGE_SIZE > VIA_MAX_BUFFER_DMA_PAGES)
1294 chan->frag_number = (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE) / chan->frag_size;
1295
1296 out:
1297 if (chan->is_record)
1298 atomic_set (&chan->n_frags, 0);
1299 else
1300 atomic_set (&chan->n_frags, chan->frag_number);
1301
1302 DPRINTK ("EXIT\n");
1303
1304 return 0;
1305 }
1306
1307 #ifdef VIA_CHAN_DUMP_BUFS
1308 /**
1309 * via_chan_dump_bufs - Display DMA table contents
1310 * @chan: Channel whose DMA table will be displayed
1311 *
1312 * Debugging function which displays the contents of the
1313 * scatter-gather DMA table for the given channel @chan.
1314 */
1315
1316 static void via_chan_dump_bufs (struct via_channel *chan)
1317 {
1318 int i;
1319
1320 for (i = 0; i < chan->frag_number; i++) {
1321 DPRINTK ("#%02d: addr=%x, count=%u, flag=%d, eol=%d\n",
1322 i, chan->sgtable[i].addr,
1323 chan->sgtable[i].count & 0x00FFFFFF,
1324 chan->sgtable[i].count & VIA_FLAG ? 1 : 0,
1325 chan->sgtable[i].count & VIA_EOL ? 1 : 0);
1326 }
1327 DPRINTK ("buf_in_use = %d, nextbuf = %d\n",
1328 atomic_read (&chan->buf_in_use),
1329 atomic_read (&chan->sw_ptr));
1330 }
1331 #endif /* VIA_CHAN_DUMP_BUFS */
1332
1333
1334 /**
1335 * via_chan_flush_frag - Flush partially-full playback buffer to hardware
1336 * @chan: Channel whose DMA table will be flushed
1337 *
1338 * Flushes partially-full playback buffer to hardware.
1339 */
1340
1341 static void via_chan_flush_frag (struct via_channel *chan)
1342 {
1343 DPRINTK ("ENTER\n");
1344
1345 assert (chan->slop_len > 0);
1346
1347 if (chan->sw_ptr == (chan->frag_number - 1))
1348 chan->sw_ptr = 0;
1349 else
1350 chan->sw_ptr++;
1351
1352 chan->slop_len = 0;
1353
1354 assert (atomic_read (&chan->n_frags) > 0);
1355 atomic_dec (&chan->n_frags);
1356
1357 DPRINTK ("EXIT\n");
1358 }
1359
1360
1361
1362 /**
1363 * via_chan_maybe_start - Initiate audio hardware DMA operation
1364 * @chan: Channel whose DMA is to be started
1365 *
1366 * Initiate DMA operation, if the DMA engine for the given
1367 * channel @chan is not already active.
1368 */
1369
1370 static inline void via_chan_maybe_start (struct via_channel *chan)
1371 {
1372 assert (chan->is_active == sg_active(chan->iobase));
1373
1374 DPRINTK ("MAYBE START %s\n", chan->name);
1375 if (!chan->is_active && chan->is_enabled) {
1376 chan->is_active = 1;
1377 sg_begin (chan);
1378 DPRINTK ("starting channel %s\n", chan->name);
1379 }
1380 }
1381
1382
1383 /****************************************************************
1384 *
1385 * Interface to ac97-codec module
1386 *
1387 *
1388 */
1389
1390 /**
1391 * via_ac97_wait_idle - Wait until AC97 codec is not busy
1392 * @card: Private info for specified board
1393 *
1394 * Sleep until the AC97 codec is no longer busy.
1395 * Returns the final value read from the SGD
1396 * register being polled.
1397 */
1398
1399 static u8 via_ac97_wait_idle (struct via_info *card)
1400 {
1401 u8 tmp8;
1402 int counter = VIA_COUNTER_LIMIT;
1403
1404 DPRINTK ("ENTER/EXIT\n");
1405
1406 assert (card != NULL);
1407 assert (card->pdev != NULL);
1408
1409 do {
1410 udelay (15);
1411
1412 tmp8 = inb (card->baseaddr + 0x83);
1413 } while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0));
1414
1415 if (tmp8 & VIA_CR83_BUSY)
1416 printk (KERN_WARNING PFX "timeout waiting on AC97 codec\n");
1417 return tmp8;
1418 }
1419
1420
1421 /**
1422 * via_ac97_read_reg - Read AC97 standard register
1423 * @codec: Pointer to generic AC97 codec info
1424 * @reg: Index of AC97 register to be read
1425 *
1426 * Read the value of a single AC97 codec register,
1427 * as defined by the Intel AC97 specification.
1428 *
1429 * Defines the standard AC97 read-register operation
1430 * required by the kernel's ac97_codec interface.
1431 *
1432 * Returns the 16-bit value stored in the specified
1433 * register.
1434 */
1435
1436 static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg)
1437 {
1438 unsigned long data;
1439 struct via_info *card;
1440 int counter;
1441
1442 DPRINTK ("ENTER\n");
1443
1444 assert (codec != NULL);
1445 assert (codec->private_data != NULL);
1446
1447 card = codec->private_data;
1448
1449 spin_lock(&card->ac97_lock);
1450
1451 /* Every time we write to register 80 we cause a transaction.
1452 The only safe way to clear the valid bit is to write it at
1453 the same time as the command */
1454 data = (reg << 16) | VIA_CR80_READ | VIA_CR80_VALID;
1455
1456 outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
1457 udelay (20);
1458
1459 for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
1460 udelay (1);
1461 if ((((data = inl(card->baseaddr + VIA_BASE0_AC97_CTRL)) &
1462 (VIA_CR80_VALID|VIA_CR80_BUSY)) == VIA_CR80_VALID))
1463 goto out;
1464 }
1465
1466 printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data);
1467 goto err_out;
1468
1469 out:
1470 /* Once the valid bit has become set, we must wait a complete AC97
1471 frame before the data has settled. */
1472 udelay(25);
1473 data = (unsigned long) inl (card->baseaddr + VIA_BASE0_AC97_CTRL);
1474
1475 outb (0x02, card->baseaddr + 0x83);
1476
1477 if (((data & 0x007F0000) >> 16) == reg) {
1478 DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n",
1479 data, data & 0x0000FFFF);
1480 spin_unlock(&card->ac97_lock);
1481 return data & 0x0000FFFF;
1482 }
1483
1484 printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n",
1485 reg, ((data & 0x007F0000) >> 16));
1486
1487 err_out:
1488 spin_unlock(&card->ac97_lock);
1489 DPRINTK ("EXIT, returning 0\n");
1490 return 0;
1491 }
1492
1493
1494 /**
1495 * via_ac97_write_reg - Write AC97 standard register
1496 * @codec: Pointer to generic AC97 codec info
1497 * @reg: Index of AC97 register to be written
1498 * @value: Value to be written to AC97 register
1499 *
1500 * Write the value of a single AC97 codec register,
1501 * as defined by the Intel AC97 specification.
1502 *
1503 * Defines the standard AC97 write-register operation
1504 * required by the kernel's ac97_codec interface.
1505 */
1506
1507 static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value)
1508 {
1509 u32 data;
1510 struct via_info *card;
1511 int counter;
1512
1513 DPRINTK ("ENTER\n");
1514
1515 assert (codec != NULL);
1516 assert (codec->private_data != NULL);
1517
1518 card = codec->private_data;
1519
1520 spin_lock(&card->ac97_lock);
1521
1522 data = (reg << 16) + value;
1523 outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
1524 udelay (10);
1525
1526 for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
1527 if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0)
1528 goto out;
1529
1530 udelay (15);
1531 }
1532
1533 printk (KERN_WARNING PFX "timeout after AC97 codec write (0x%X, 0x%X)\n", reg, value);
1534
1535 out:
1536 spin_unlock(&card->ac97_lock);
1537 DPRINTK ("EXIT\n");
1538 }
1539
1540
1541 static int via_mixer_open (struct inode *inode, struct file *file)
1542 {
1543 int minor = iminor(inode);
1544 struct via_info *card;
1545 struct pci_dev *pdev = NULL;
1546 struct pci_driver *drvr;
1547
1548 DPRINTK ("ENTER\n");
1549
1550 while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
1551 drvr = pci_dev_driver (pdev);
1552 if (drvr == &via_driver) {
1553 assert (pci_get_drvdata (pdev) != NULL);
1554
1555 card = pci_get_drvdata (pdev);
1556 if (card->ac97->dev_mixer == minor)
1557 goto match;
1558 }
1559 }
1560
1561 DPRINTK ("EXIT, returning -ENODEV\n");
1562 return -ENODEV;
1563
1564 match:
1565 pci_dev_put(pdev);
1566 file->private_data = card->ac97;
1567
1568 DPRINTK ("EXIT, returning 0\n");
1569 return nonseekable_open(inode, file);
1570 }
1571
1572 static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
1573 unsigned long arg)
1574 {
1575 struct ac97_codec *codec = file->private_data;
1576 struct via_info *card;
1577 int nonblock = (file->f_flags & O_NONBLOCK);
1578 int rc;
1579
1580 DPRINTK ("ENTER\n");
1581
1582 assert (codec != NULL);
1583 card = codec->private_data;
1584 assert (card != NULL);
1585
1586 rc = via_syscall_down (card, nonblock);
1587 if (rc) goto out;
1588
1589 #if 0
1590 /*
1591 * Intercept volume control on 8233 and 8235
1592 */
1593 if(card->volume)
1594 {
1595 switch(cmd)
1596 {
1597 case SOUND_MIXER_READ_VOLUME:
1598 return card->mixer_vol;
1599 case SOUND_MIXER_WRITE_VOLUME:
1600 {
1601 int v;
1602 if(get_user(v, (int *)arg))
1603 {
1604 rc = -EFAULT;
1605 goto out;
1606 }
1607 card->mixer_vol = v;
1608 }
1609 }
1610 }
1611 #endif
1612 rc = codec->mixer_ioctl(codec, cmd, arg);
1613
1614 mutex_unlock(&card->syscall_mutex);
1615
1616 out:
1617 DPRINTK ("EXIT, returning %d\n", rc);
1618 return rc;
1619 }
1620
1621
1622 static struct file_operations via_mixer_fops = {
1623 .owner = THIS_MODULE,
1624 .open = via_mixer_open,
1625 .llseek = no_llseek,
1626 .ioctl = via_mixer_ioctl,
1627 };
1628
1629
1630 static int __devinit via_ac97_reset (struct via_info *card)
1631 {
1632 struct pci_dev *pdev = card->pdev;
1633 u8 tmp8;
1634 u16 tmp16;
1635
1636 DPRINTK ("ENTER\n");
1637
1638 assert (pdev != NULL);
1639
1640 #ifndef NDEBUG
1641 {
1642 u8 r40,r41,r42,r43,r44,r48;
1643 pci_read_config_byte (card->pdev, 0x40, &r40);
1644 pci_read_config_byte (card->pdev, 0x41, &r41);
1645 pci_read_config_byte (card->pdev, 0x42, &r42);
1646 pci_read_config_byte (card->pdev, 0x43, &r43);
1647 pci_read_config_byte (card->pdev, 0x44, &r44);
1648 pci_read_config_byte (card->pdev, 0x48, &r48);
1649 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
1650 r40,r41,r42,r43,r44,r48);
1651
1652 spin_lock_irq (&card->lock);
1653 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
1654 inb (card->baseaddr + 0x00),
1655 inb (card->baseaddr + 0x01),
1656 inb (card->baseaddr + 0x02),
1657 inl (card->baseaddr + 0x04),
1658 inl (card->baseaddr + 0x0C),
1659 inl (card->baseaddr + 0x80),
1660 inl (card->baseaddr + 0x84));
1661 spin_unlock_irq (&card->lock);
1662
1663 }
1664 #endif
1665
1666 /*
1667 * Reset AC97 controller: enable, disable, enable,
1668 * pausing after each command for good luck. Only
1669 * do this if the codec is not ready, because it causes
1670 * loud pops and such due to such a hard codec reset.
1671 */
1672 pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
1673 if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
1674 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1675 VIA_CR41_AC97_ENABLE |
1676 VIA_CR41_AC97_RESET |
1677 VIA_CR41_AC97_WAKEUP);
1678 udelay (100);
1679
1680 pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
1681 udelay (100);
1682
1683 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1684 VIA_CR41_AC97_ENABLE |
1685 VIA_CR41_PCM_ENABLE |
1686 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1687 udelay (100);
1688 }
1689
1690 /* Make sure VRA is enabled, in case we didn't do a
1691 * complete codec reset, above
1692 */
1693 pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
1694 if (((tmp8 & VIA_CR41_VRA) == 0) ||
1695 ((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
1696 ((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
1697 ((tmp8 & VIA_CR41_AC97_RESET) == 0)) {
1698 pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
1699 VIA_CR41_AC97_ENABLE |
1700 VIA_CR41_PCM_ENABLE |
1701 VIA_CR41_VRA | VIA_CR41_AC97_RESET);
1702 udelay (100);
1703 }
1704
1705 if(card->legacy)
1706 {
1707 #if 0 /* this breaks on K7M */
1708 /* disable legacy stuff */
1709 pci_write_config_byte (pdev, 0x42, 0x00);
1710 udelay(10);
1711 #endif
1712
1713 /* route FM trap to IRQ, disable FM trap */
1714 pci_write_config_byte (pdev, 0x48, 0x05);
1715 udelay(10);
1716 }
1717
1718 /* disable all codec GPI interrupts */
1719 outl (0, pci_resource_start (pdev, 0) + 0x8C);
1720
1721 /* WARNING: this line is magic. Remove this
1722 * and things break. */
1723 /* enable variable rate */
1724 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1725 if ((tmp16 & 1) == 0)
1726 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1727
1728 DPRINTK ("EXIT, returning 0\n");
1729 return 0;
1730 }
1731
1732
1733 static void via_ac97_codec_wait (struct ac97_codec *codec)
1734 {
1735 assert (codec->private_data != NULL);
1736 via_ac97_wait_idle (codec->private_data);
1737 }
1738
1739
1740 static int __devinit via_ac97_init (struct via_info *card)
1741 {
1742 int rc;
1743 u16 tmp16;
1744
1745 DPRINTK ("ENTER\n");
1746
1747 assert (card != NULL);
1748
1749 card->ac97 = ac97_alloc_codec();
1750 if(card->ac97 == NULL)
1751 return -ENOMEM;
1752
1753 card->ac97->private_data = card;
1754 card->ac97->codec_read = via_ac97_read_reg;
1755 card->ac97->codec_write = via_ac97_write_reg;
1756 card->ac97->codec_wait = via_ac97_codec_wait;
1757
1758 card->ac97->dev_mixer = register_sound_mixer (&via_mixer_fops, -1);
1759 if (card->ac97->dev_mixer < 0) {
1760 printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n");
1761 DPRINTK ("EXIT, returning -EIO\n");
1762 ac97_release_codec(card->ac97);
1763 return -EIO;
1764 }
1765
1766 rc = via_ac97_reset (card);
1767 if (rc) {
1768 printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
1769 goto err_out;
1770 }
1771
1772 mdelay(10);
1773
1774 if (ac97_probe_codec (card->ac97) == 0) {
1775 printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
1776 rc = -EIO;
1777 goto err_out;
1778 }
1779
1780 /* enable variable rate */
1781 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1782 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1783
1784 /*
1785 * If we cannot enable VRA, we have a locked-rate codec.
1786 * We try again to enable VRA before assuming so, however.
1787 */
1788 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1789 if ((tmp16 & 1) == 0) {
1790 via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
1791 tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
1792 if ((tmp16 & 1) == 0) {
1793 card->locked_rate = 1;
1794 printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
1795 }
1796 }
1797
1798 DPRINTK ("EXIT, returning 0\n");
1799 return 0;
1800
1801 err_out:
1802 unregister_sound_mixer (card->ac97->dev_mixer);
1803 DPRINTK ("EXIT, returning %d\n", rc);
1804 ac97_release_codec(card->ac97);
1805 return rc;
1806 }
1807
1808
1809 static void via_ac97_cleanup (struct via_info *card)
1810 {
1811 DPRINTK ("ENTER\n");
1812
1813 assert (card != NULL);
1814 assert (card->ac97->dev_mixer >= 0);
1815
1816 unregister_sound_mixer (card->ac97->dev_mixer);
1817 ac97_release_codec(card->ac97);
1818
1819 DPRINTK ("EXIT\n");
1820 }
1821
1822
1823
1824 /****************************************************************
1825 *
1826 * Interrupt-related code
1827 *
1828 */
1829
1830 /**
1831 * via_intr_channel - handle an interrupt for a single channel
1832 * @card: unused
1833 * @chan: handle interrupt for this channel
1834 *
1835 * This is the "meat" of the interrupt handler,
1836 * containing the actions taken each time an interrupt
1837 * occurs. All communication and coordination with
1838 * userspace takes place here.
1839 *
1840 * Locking: inside card->lock
1841 */
1842
1843 static void via_intr_channel (struct via_info *card, struct via_channel *chan)
1844 {
1845 u8 status;
1846 int n;
1847
1848 /* check pertinent bits of status register for action bits */
1849 status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED);
1850 if (!status)
1851 return;
1852
1853 /* acknowledge any flagged bits ASAP */
1854 outb (status, chan->iobase);
1855
1856 if (!chan->sgtable) /* XXX: temporary solution */
1857 return;
1858
1859 /* grab current h/w ptr value */
1860 n = atomic_read (&chan->hw_ptr);
1861
1862 /* sanity check: make sure our h/w ptr doesn't have a weird value */
1863 assert (n >= 0);
1864 assert (n < chan->frag_number);
1865
1866
1867 /* reset SGD data structure in memory to reflect a full buffer,
1868 * and advance the h/w ptr, wrapping around to zero if needed
1869 */
1870 if (n == (chan->frag_number - 1)) {
1871 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_EOL);
1872 atomic_set (&chan->hw_ptr, 0);
1873 } else {
1874 chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG);
1875 atomic_inc (&chan->hw_ptr);
1876 }
1877
1878 /* accounting crap for SNDCTL_DSP_GETxPTR */
1879 chan->n_irqs++;
1880 chan->bytes += chan->frag_size;
1881 /* FIXME - signed overflow is undefined */
1882 if (chan->bytes < 0) /* handle overflow of 31-bit value */
1883 chan->bytes = chan->frag_size;
1884 /* all following checks only occur when not in mmap(2) mode */
1885 if (!chan->is_mapped)
1886 {
1887 /* If we are recording, then n_frags represents the number
1888 * of fragments waiting to be handled by userspace.
1889 * If we are playback, then n_frags represents the number
1890 * of fragments remaining to be filled by userspace.
1891 * We increment here. If we reach max number of fragments,
1892 * this indicates an underrun/overrun. For this case under OSS,
1893 * we stop the record/playback process.
1894 */
1895 if (atomic_read (&chan->n_frags) < chan->frag_number)
1896 atomic_inc (&chan->n_frags);
1897 assert (atomic_read (&chan->n_frags) <= chan->frag_number);
1898 if (atomic_read (&chan->n_frags) == chan->frag_number) {
1899 chan->is_active = 0;
1900 via_chan_stop (chan->iobase);
1901 }
1902 }
1903 /* wake up anyone listening to see when interrupts occur */
1904 wake_up_all (&chan->wait);
1905
1906 DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n",
1907 chan->name, status, (long) inl (chan->iobase + 0x04),
1908 atomic_read (&chan->hw_ptr));
1909
1910 DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name,
1911 atomic_read (&chan->n_frags), missed);
1912 }
1913
1914
1915 static irqreturn_t via_interrupt(int irq, void *dev_id)
1916 {
1917 struct via_info *card = dev_id;
1918 u32 status32;
1919
1920 /* to minimize interrupt sharing costs, we use the SGD status
1921 * shadow register to check the status of all inputs and
1922 * outputs with a single 32-bit bus read. If no interrupt
1923 * conditions are flagged, we exit immediately
1924 */
1925 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1926 if (!(status32 & VIA_INTR_MASK))
1927 {
1928 #ifdef CONFIG_MIDI_VIA82CXXX
1929 if (card->midi_devc)
1930 uart401intr(irq, card->midi_devc);
1931 #endif
1932 return IRQ_HANDLED;
1933 }
1934 DPRINTK ("intr, status32 == 0x%08X\n", status32);
1935
1936 /* synchronize interrupt handling under SMP. this spinlock
1937 * goes away completely on UP
1938 */
1939 spin_lock (&card->lock);
1940
1941 if (status32 & VIA_INTR_OUT)
1942 via_intr_channel (card, &card->ch_out);
1943 if (status32 & VIA_INTR_IN)
1944 via_intr_channel (card, &card->ch_in);
1945 if (status32 & VIA_INTR_FM)
1946 via_intr_channel (card, &card->ch_fm);
1947
1948 spin_unlock (&card->lock);
1949
1950 return IRQ_HANDLED;
1951 }
1952
1953 static irqreturn_t via_new_interrupt(int irq, void *dev_id)
1954 {
1955 struct via_info *card = dev_id;
1956 u32 status32;
1957
1958 /* to minimize interrupt sharing costs, we use the SGD status
1959 * shadow register to check the status of all inputs and
1960 * outputs with a single 32-bit bus read. If no interrupt
1961 * conditions are flagged, we exit immediately
1962 */
1963 status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
1964 if (!(status32 & VIA_NEW_INTR_MASK))
1965 return IRQ_NONE;
1966 /*
1967 * goes away completely on UP
1968 */
1969 spin_lock (&card->lock);
1970
1971 via_intr_channel (card, &card->ch_out);
1972 via_intr_channel (card, &card->ch_in);
1973 via_intr_channel (card, &card->ch_fm);
1974
1975 spin_unlock (&card->lock);
1976 return IRQ_HANDLED;
1977 }
1978
1979
1980 /**
1981 * via_interrupt_init - Initialize interrupt handling
1982 * @card: Private info for specified board
1983 *
1984 * Obtain and reserve IRQ for using in handling audio events.
1985 * Also, disable any IRQ-generating resources, to make sure
1986 * we don't get interrupts before we want them.
1987 */
1988
1989 static int via_interrupt_init (struct via_info *card)
1990 {
1991 u8 tmp8;
1992
1993 DPRINTK ("ENTER\n");
1994
1995 assert (card != NULL);
1996 assert (card->pdev != NULL);
1997
1998 /* check for sane IRQ number. can this ever happen? */
1999 if (card->pdev->irq < 2) {
2000 printk (KERN_ERR PFX "insane IRQ %d, aborting\n",
2001 card->pdev->irq);
2002 DPRINTK ("EXIT, returning -EIO\n");
2003 return -EIO;
2004 }
2005
2006 /* VIA requires this is done */
2007 pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq);
2008
2009 if(card->legacy)
2010 {
2011 /* make sure FM irq is not routed to us */
2012 pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
2013 if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
2014 tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
2015 pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
2016 }
2017 if (request_irq (card->pdev->irq, via_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
2018 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2019 card->pdev->irq);
2020 DPRINTK ("EXIT, returning -EBUSY\n");
2021 return -EBUSY;
2022 }
2023 }
2024 else
2025 {
2026 if (request_irq (card->pdev->irq, via_new_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
2027 printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
2028 card->pdev->irq);
2029 DPRINTK ("EXIT, returning -EBUSY\n");
2030 return -EBUSY;
2031 }
2032 }
2033
2034 DPRINTK ("EXIT, returning 0\n");
2035 return 0;
2036 }
2037
2038
2039 /****************************************************************
2040 *
2041 * OSS DSP device
2042 *
2043 */
2044
2045 static struct file_operations via_dsp_fops = {
2046 .owner = THIS_MODULE,
2047 .open = via_dsp_open,
2048 .release = via_dsp_release,
2049 .read = via_dsp_read,
2050 .write = via_dsp_write,
2051 .poll = via_dsp_poll,
2052 .llseek = no_llseek,
2053 .ioctl = via_dsp_ioctl,
2054 .mmap = via_dsp_mmap,
2055 };
2056
2057
2058 static int __devinit via_dsp_init (struct via_info *card)
2059 {
2060 u8 tmp8;
2061
2062 DPRINTK ("ENTER\n");
2063
2064 assert (card != NULL);
2065
2066 if(card->legacy)
2067 {
2068 /* turn off legacy features, if not already */
2069 pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
2070 if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE)) {
2071 tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE);
2072 pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8);
2073 }
2074 }
2075
2076 via_stop_everything (card);
2077
2078 card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1);
2079 if (card->dev_dsp < 0) {
2080 DPRINTK ("EXIT, returning -ENODEV\n");
2081 return -ENODEV;
2082 }
2083 DPRINTK ("EXIT, returning 0\n");
2084 return 0;
2085 }
2086
2087
2088 static void via_dsp_cleanup (struct via_info *card)
2089 {
2090 DPRINTK ("ENTER\n");
2091
2092 assert (card != NULL);
2093 assert (card->dev_dsp >= 0);
2094
2095 via_stop_everything (card);
2096
2097 unregister_sound_dsp (card->dev_dsp);
2098
2099 DPRINTK ("EXIT\n");
2100 }
2101
2102
2103 static struct page * via_mm_nopage (struct vm_area_struct * vma,
2104 unsigned long address, int *type)
2105 {
2106 struct via_info *card = vma->vm_private_data;
2107 struct via_channel *chan = &card->ch_out;
2108 struct page *dmapage;
2109 unsigned long pgoff;
2110 int rd, wr;
2111
2112 DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
2113 vma->vm_start,
2114 address - vma->vm_start,
2115 (address - vma->vm_start) >> PAGE_SHIFT,
2116 address);
2117
2118 if (address > vma->vm_end) {
2119 DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
2120 return NOPAGE_SIGBUS; /* Disallow mremap */
2121 }
2122 if (!card) {
2123 DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
2124 return NOPAGE_SIGBUS; /* Nothing allocated */
2125 }
2126
2127 pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
2128 rd = card->ch_in.is_mapped;
2129 wr = card->ch_out.is_mapped;
2130
2131 #ifndef VIA_NDEBUG
2132 {
2133 unsigned long max_bufs = chan->frag_number;
2134 if (rd && wr) max_bufs *= 2;
2135 /* via_dsp_mmap() should ensure this */
2136 assert (pgoff < max_bufs);
2137 }
2138 #endif
2139
2140 /* if full-duplex (read+write) and we have two sets of bufs,
2141 * then the playback buffers come first, sez soundcard.c */
2142 if (pgoff >= chan->page_number) {
2143 pgoff -= chan->page_number;
2144 chan = &card->ch_in;
2145 } else if (!wr)
2146 chan = &card->ch_in;
2147
2148 assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
2149
2150 dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
2151 DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
2152 dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
2153 get_page (dmapage);
2154 if (type)
2155 *type = VM_FAULT_MINOR;
2156 return dmapage;
2157 }
2158
2159
2160 #ifndef VM_RESERVED
2161 static int via_mm_swapout (struct page *page, struct file *filp)
2162 {
2163 return 0;
2164 }
2165 #endif /* VM_RESERVED */
2166
2167
2168 static struct vm_operations_struct via_mm_ops = {
2169 .nopage = via_mm_nopage,
2170
2171 #ifndef VM_RESERVED
2172 .swapout = via_mm_swapout,
2173 #endif
2174 };
2175
2176
2177 static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
2178 {
2179 struct via_info *card;
2180 int nonblock = (file->f_flags & O_NONBLOCK);
2181 int rc = -EINVAL, rd=0, wr=0;
2182 unsigned long max_size, size, start, offset;
2183
2184 assert (file != NULL);
2185 assert (vma != NULL);
2186 card = file->private_data;
2187 assert (card != NULL);
2188
2189 DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
2190 vma->vm_start,
2191 vma->vm_end - vma->vm_start,
2192 vma->vm_pgoff);
2193
2194 max_size = 0;
2195 if (vma->vm_flags & VM_READ) {
2196 rd = 1;
2197 via_chan_set_buffering(card, &card->ch_in, -1);
2198 via_chan_buffer_init (card, &card->ch_in);
2199 max_size += card->ch_in.page_number << PAGE_SHIFT;
2200 }
2201 if (vma->vm_flags & VM_WRITE) {
2202 wr = 1;
2203 via_chan_set_buffering(card, &card->ch_out, -1);
2204 via_chan_buffer_init (card, &card->ch_out);
2205 max_size += card->ch_out.page_number << PAGE_SHIFT;
2206 }
2207
2208 start = vma->vm_start;
2209 offset = (vma->vm_pgoff << PAGE_SHIFT);
2210 size = vma->vm_end - vma->vm_start;
2211
2212 /* some basic size/offset sanity checks */
2213 if (size > max_size)
2214 goto out;
2215 if (offset > max_size - size)
2216 goto out;
2217
2218 rc = via_syscall_down (card, nonblock);
2219 if (rc) goto out;
2220
2221 vma->vm_ops = &via_mm_ops;
2222 vma->vm_private_data = card;
2223
2224 #ifdef VM_RESERVED
2225 vma->vm_flags |= VM_RESERVED;
2226 #endif
2227
2228 if (rd)
2229 card->ch_in.is_mapped = 1;
2230 if (wr)
2231 card->ch_out.is_mapped = 1;
2232
2233 mutex_unlock(&card->syscall_mutex);
2234 rc = 0;
2235
2236 out:
2237 DPRINTK ("EXIT, returning %d\n", rc);
2238 return rc;
2239 }
2240
2241
2242 static ssize_t via_dsp_do_read (struct via_info *card,
2243 char __user *userbuf, size_t count,
2244 int nonblock)
2245 {
2246 DECLARE_WAITQUEUE(wait, current);
2247 const char __user *orig_userbuf = userbuf;
2248 struct via_channel *chan = &card->ch_in;
2249 size_t size;
2250 int n, tmp;
2251 ssize_t ret = 0;
2252
2253 /* if SGD has not yet been started, start it */
2254 via_chan_maybe_start (chan);
2255
2256 handle_one_block:
2257 /* just to be a nice neighbor */
2258 /* Thomas Sailer:
2259 * But also to ourselves, release semaphore if we do so */
2260 if (need_resched()) {
2261 mutex_unlock(&card->syscall_mutex);
2262 schedule ();
2263 ret = via_syscall_down (card, nonblock);
2264 if (ret)
2265 goto out;
2266 }
2267
2268 /* grab current channel software pointer. In the case of
2269 * recording, this is pointing to the next buffer that
2270 * will receive data from the audio hardware.
2271 */
2272 n = chan->sw_ptr;
2273
2274 /* n_frags represents the number of fragments waiting
2275 * to be copied to userland. sleep until at least
2276 * one buffer has been read from the audio hardware.
2277 */
2278 add_wait_queue(&chan->wait, &wait);
2279 for (;;) {
2280 __set_current_state(TASK_INTERRUPTIBLE);
2281 tmp = atomic_read (&chan->n_frags);
2282 assert (tmp >= 0);
2283 assert (tmp <= chan->frag_number);
2284 if (tmp)
2285 break;
2286 if (nonblock || !chan->is_active) {
2287 ret = -EAGAIN;
2288 break;
2289 }
2290
2291 mutex_unlock(&card->syscall_mutex);
2292
2293 DPRINTK ("Sleeping on block %d\n", n);
2294 schedule();
2295
2296 ret = via_syscall_down (card, nonblock);
2297 if (ret)
2298 break;
2299
2300 if (signal_pending (current)) {
2301 ret = -ERESTARTSYS;
2302 break;
2303 }
2304 }
2305 set_current_state(TASK_RUNNING);
2306 remove_wait_queue(&chan->wait, &wait);
2307 if (ret)
2308 goto out;
2309
2310 /* Now that we have a buffer we can read from, send
2311 * as much as sample data possible to userspace.
2312 */
2313 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2314 size_t slop_left = chan->frag_size - chan->slop_len;
2315 void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
2316 unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
2317
2318 size = (count < slop_left) ? count : slop_left;
2319 if (copy_to_user (userbuf,
2320 base + ofs + chan->slop_len,
2321 size)) {
2322 ret = -EFAULT;
2323 goto out;
2324 }
2325
2326 count -= size;
2327 chan->slop_len += size;
2328 userbuf += size;
2329 }
2330
2331 /* If we didn't copy the buffer completely to userspace,
2332 * stop now.
2333 */
2334 if (chan->slop_len < chan->frag_size)
2335 goto out;
2336
2337 /*
2338 * If we get to this point, we copied one buffer completely
2339 * to userspace, give the buffer back to the hardware.
2340 */
2341
2342 /* advance channel software pointer to point to
2343 * the next buffer from which we will copy
2344 */
2345 if (chan->sw_ptr == (chan->frag_number - 1))
2346 chan->sw_ptr = 0;
2347 else
2348 chan->sw_ptr++;
2349
2350 /* mark one less buffer waiting to be processed */
2351 assert (atomic_read (&chan->n_frags) > 0);
2352 atomic_dec (&chan->n_frags);
2353
2354 /* we are at a block boundary, there is no fragment data */
2355 chan->slop_len = 0;
2356
2357 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2358 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2359
2360 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2361 inb (card->baseaddr + 0x00),
2362 inb (card->baseaddr + 0x01),
2363 inb (card->baseaddr + 0x02),
2364 inl (card->baseaddr + 0x04),
2365 inl (card->baseaddr + 0x0C),
2366 inl (card->baseaddr + 0x80),
2367 inl (card->baseaddr + 0x84));
2368
2369 if (count > 0)
2370 goto handle_one_block;
2371
2372 out:
2373 return (userbuf != orig_userbuf) ? (userbuf - orig_userbuf) : ret;
2374 }
2375
2376
2377 static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
2378 {
2379 struct via_info *card;
2380 int nonblock = (file->f_flags & O_NONBLOCK);
2381 int rc;
2382
2383 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2384 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2385
2386 assert (file != NULL);
2387 card = file->private_data;
2388 assert (card != NULL);
2389
2390 rc = via_syscall_down (card, nonblock);
2391 if (rc) goto out;
2392
2393 if (card->ch_in.is_mapped) {
2394 rc = -ENXIO;
2395 goto out_up;
2396 }
2397
2398 via_chan_set_buffering(card, &card->ch_in, -1);
2399 rc = via_chan_buffer_init (card, &card->ch_in);
2400
2401 if (rc)
2402 goto out_up;
2403
2404 rc = via_dsp_do_read (card, buffer, count, nonblock);
2405
2406 out_up:
2407 mutex_unlock(&card->syscall_mutex);
2408 out:
2409 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2410 return rc;
2411 }
2412
2413
2414 static ssize_t via_dsp_do_write (struct via_info *card,
2415 const char __user *userbuf, size_t count,
2416 int nonblock)
2417 {
2418 DECLARE_WAITQUEUE(wait, current);
2419 const char __user *orig_userbuf = userbuf;
2420 struct via_channel *chan = &card->ch_out;
2421 volatile struct via_sgd_table *sgtable = chan->sgtable;
2422 size_t size;
2423 int n, tmp;
2424 ssize_t ret = 0;
2425
2426 handle_one_block:
2427 /* just to be a nice neighbor */
2428 /* Thomas Sailer:
2429 * But also to ourselves, release semaphore if we do so */
2430 if (need_resched()) {
2431 mutex_unlock(&card->syscall_mutex);
2432 schedule ();
2433 ret = via_syscall_down (card, nonblock);
2434 if (ret)
2435 goto out;
2436 }
2437
2438 /* grab current channel fragment pointer. In the case of
2439 * playback, this is pointing to the next fragment that
2440 * should receive data from userland.
2441 */
2442 n = chan->sw_ptr;
2443
2444 /* n_frags represents the number of fragments remaining
2445 * to be filled by userspace. Sleep until
2446 * at least one fragment is available for our use.
2447 */
2448 add_wait_queue(&chan->wait, &wait);
2449 for (;;) {
2450 __set_current_state(TASK_INTERRUPTIBLE);
2451 tmp = atomic_read (&chan->n_frags);
2452 assert (tmp >= 0);
2453 assert (tmp <= chan->frag_number);
2454 if (tmp)
2455 break;
2456 if (nonblock || !chan->is_active) {
2457 ret = -EAGAIN;
2458 break;
2459 }
2460
2461 mutex_unlock(&card->syscall_mutex);
2462
2463 DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
2464 schedule();
2465
2466 ret = via_syscall_down (card, nonblock);
2467 if (ret)
2468 break;
2469
2470 if (signal_pending (current)) {
2471 ret = -ERESTARTSYS;
2472 break;
2473 }
2474 }
2475 set_current_state(TASK_RUNNING);
2476 remove_wait_queue(&chan->wait, &wait);
2477 if (ret)
2478 goto out;
2479
2480 /* Now that we have at least one fragment we can write to, fill the buffer
2481 * as much as possible with data from userspace.
2482 */
2483 while ((count > 0) && (chan->slop_len < chan->frag_size)) {
2484 size_t slop_left = chan->frag_size - chan->slop_len;
2485
2486 size = (count < slop_left) ? count : slop_left;
2487 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,
2488 userbuf, size)) {
2489 ret = -EFAULT;
2490 goto out;
2491 }
2492
2493 count -= size;
2494 chan->slop_len += size;
2495 userbuf += size;
2496 }
2497
2498 /* If we didn't fill up the buffer with data, stop now.
2499 * Put a 'stop' marker in the DMA table too, to tell the
2500 * audio hardware to stop if it gets here.
2501 */
2502 if (chan->slop_len < chan->frag_size) {
2503 sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
2504 goto out;
2505 }
2506
2507 /*
2508 * If we get to this point, we have filled a buffer with
2509 * audio data, flush the buffer to audio hardware.
2510 */
2511
2512 /* Record the true size for the audio hardware to notice */
2513 if (n == (chan->frag_number - 1))
2514 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
2515 else
2516 sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
2517
2518 /* advance channel software pointer to point to
2519 * the next buffer we will fill with data
2520 */
2521 if (chan->sw_ptr == (chan->frag_number - 1))
2522 chan->sw_ptr = 0;
2523 else
2524 chan->sw_ptr++;
2525
2526 /* mark one less buffer as being available for userspace consumption */
2527 assert (atomic_read (&chan->n_frags) > 0);
2528 atomic_dec (&chan->n_frags);
2529
2530 /* we are at a block boundary, there is no fragment data */
2531 chan->slop_len = 0;
2532
2533 /* if SGD has not yet been started, start it */
2534 via_chan_maybe_start (chan);
2535
2536 DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
2537 n, chan->sw_ptr, atomic_read (&chan->n_frags));
2538
2539 DPRINTK ("regs==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n",
2540 inb (card->baseaddr + 0x00),
2541 inb (card->baseaddr + 0x01),
2542 inb (card->baseaddr + 0x02),
2543 inl (card->baseaddr + 0x04),
2544 inl (card->baseaddr + 0x08),
2545 inl (card->baseaddr + 0x0C),
2546 inl (card->baseaddr + 0x80),
2547 inl (card->baseaddr + 0x84));
2548
2549 if (count > 0)
2550 goto handle_one_block;
2551
2552 out:
2553 if (userbuf - orig_userbuf)
2554 return userbuf - orig_userbuf;
2555 else
2556 return ret;
2557 }
2558
2559
2560 static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
2561 {
2562 struct via_info *card;
2563 ssize_t rc;
2564 int nonblock = (file->f_flags & O_NONBLOCK);
2565
2566 DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
2567 file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
2568
2569 assert (file != NULL);
2570 card = file->private_data;
2571 assert (card != NULL);
2572
2573 rc = via_syscall_down (card, nonblock);
2574 if (rc) goto out;
2575
2576 if (card->ch_out.is_mapped) {
2577 rc = -ENXIO;
2578 goto out_up;
2579 }
2580
2581 via_chan_set_buffering(card, &card->ch_out, -1);
2582 rc = via_chan_buffer_init (card, &card->ch_out);
2583
2584 if (rc)
2585 goto out_up;
2586
2587 rc = via_dsp_do_write (card, buffer, count, nonblock);
2588
2589 out_up:
2590 mutex_unlock(&card->syscall_mutex);
2591 out:
2592 DPRINTK ("EXIT, returning %ld\n",(long) rc);
2593 return rc;
2594 }
2595
2596
2597 static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
2598 {
2599 struct via_info *card;
2600 struct via_channel *chan;
2601 unsigned int mask = 0;
2602
2603 DPRINTK ("ENTER\n");
2604
2605 assert (file != NULL);
2606 card = file->private_data;
2607 assert (card != NULL);
2608
2609 if (file->f_mode & FMODE_READ) {
2610 chan = &card->ch_in;
2611 if (sg_active (chan->iobase))
2612 poll_wait(file, &chan->wait, wait);
2613 if (atomic_read (&chan->n_frags) > 0)
2614 mask |= POLLIN | POLLRDNORM;
2615 }
2616
2617 if (file->f_mode & FMODE_WRITE) {
2618 chan = &card->ch_out;
2619 if (sg_active (chan->iobase))
2620 poll_wait(file, &chan->wait, wait);
2621 if (atomic_read (&chan->n_frags) > 0)
2622 mask |= POLLOUT | POLLWRNORM;
2623 }
2624
2625 DPRINTK ("EXIT, returning %u\n", mask);
2626 return mask;
2627 }
2628
2629
2630 /**
2631 * via_dsp_drain_playback - sleep until all playback samples are flushed
2632 * @card: Private info for specified board
2633 * @chan: Channel to drain
2634 * @nonblock: boolean, non-zero if O_NONBLOCK is set
2635 *
2636 * Sleeps until all playback has been flushed to the audio
2637 * hardware.
2638 *
2639 * Locking: inside card->syscall_mutex
2640 */
2641
2642 static int via_dsp_drain_playback (struct via_info *card,
2643 struct via_channel *chan, int nonblock)
2644 {
2645 DECLARE_WAITQUEUE(wait, current);
2646 int ret = 0;
2647
2648 DPRINTK ("ENTER, nonblock = %d\n", nonblock);
2649
2650 if (chan->slop_len > 0)
2651 via_chan_flush_frag (chan);
2652
2653 if (atomic_read (&chan->n_frags) == chan->frag_number)
2654 goto out;
2655
2656 via_chan_maybe_start (chan);
2657
2658 add_wait_queue(&chan->wait, &wait);
2659 for (;;) {
2660 DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number);
2661 __set_current_state(TASK_INTERRUPTIBLE);
2662 if (atomic_read (&chan->n_frags) >= chan->frag_number)
2663 break;
2664
2665 if (nonblock) {
2666 DPRINTK ("EXIT, returning -EAGAIN\n");
2667 ret = -EAGAIN;
2668 break;
2669 }
2670
2671 #ifdef VIA_DEBUG
2672 {
2673 u8 r40,r41,r42,r43,r44,r48;
2674 pci_read_config_byte (card->pdev, 0x40, &r40);
2675 pci_read_config_byte (card->pdev, 0x41, &r41);
2676 pci_read_config_byte (card->pdev, 0x42, &r42);
2677 pci_read_config_byte (card->pdev, 0x43, &r43);
2678 pci_read_config_byte (card->pdev, 0x44, &r44);
2679 pci_read_config_byte (card->pdev, 0x48, &r48);
2680 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2681 r40,r41,r42,r43,r44,r48);
2682
2683 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2684 inb (card->baseaddr + 0x00),
2685 inb (card->baseaddr + 0x01),
2686 inb (card->baseaddr + 0x02),
2687 inl (card->baseaddr + 0x04),
2688 inl (card->baseaddr + 0x0C),
2689 inl (card->baseaddr + 0x80),
2690 inl (card->baseaddr + 0x84));
2691 }
2692
2693 if (!chan->is_active)
2694 printk (KERN_ERR "sleeping but not active\n");
2695 #endif
2696
2697 mutex_unlock(&card->syscall_mutex);
2698
2699 DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
2700 schedule();
2701
2702 if ((ret = via_syscall_down (card, nonblock)))
2703 break;
2704
2705 if (signal_pending (current)) {
2706 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
2707 ret = -ERESTARTSYS;
2708 break;
2709 }
2710 }
2711 set_current_state(TASK_RUNNING);
2712 remove_wait_queue(&chan->wait, &wait);
2713
2714 #ifdef VIA_DEBUG
2715 {
2716 u8 r40,r41,r42,r43,r44,r48;
2717 pci_read_config_byte (card->pdev, 0x40, &r40);
2718 pci_read_config_byte (card->pdev, 0x41, &r41);
2719 pci_read_config_byte (card->pdev, 0x42, &r42);
2720 pci_read_config_byte (card->pdev, 0x43, &r43);
2721 pci_read_config_byte (card->pdev, 0x44, &r44);
2722 pci_read_config_byte (card->pdev, 0x48, &r48);
2723 DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
2724 r40,r41,r42,r43,r44,r48);
2725
2726 DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
2727 inb (card->baseaddr + 0x00),
2728 inb (card->baseaddr + 0x01),
2729 inb (card->baseaddr + 0x02),
2730 inl (card->baseaddr + 0x04),
2731 inl (card->baseaddr + 0x0C),
2732 inl (card->baseaddr + 0x80),
2733 inl (card->baseaddr + 0x84));
2734
2735 DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
2736 }
2737 #endif
2738
2739 out:
2740 DPRINTK ("EXIT, returning %d\n", ret);
2741 return ret;
2742 }
2743
2744
2745 /**
2746 * via_dsp_ioctl_space - get information about channel buffering
2747 * @card: Private info for specified board
2748 * @chan: pointer to channel-specific info
2749 * @arg: user buffer for returned information
2750 *
2751 * Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
2752 *
2753 * Locking: inside card->syscall_mutex
2754 */
2755
2756 static int via_dsp_ioctl_space (struct via_info *card,
2757 struct via_channel *chan,
2758 void __user *arg)
2759 {
2760 audio_buf_info info;
2761
2762 via_chan_set_buffering(card, chan, -1);
2763
2764 info.fragstotal = chan->frag_number;
2765 info.fragsize = chan->frag_size;
2766
2767 /* number of full fragments we can read/write without blocking */
2768 info.fragments = atomic_read (&chan->n_frags);
2769
2770 if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0))
2771 info.fragments--;
2772
2773 /* number of bytes that can be read or written immediately
2774 * without blocking.
2775 */
2776 info.bytes = (info.fragments * chan->frag_size);
2777 if (chan->slop_len % chan->frag_size > 0)
2778 info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size);
2779
2780 DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n",
2781 info.fragstotal,
2782 info.fragsize,
2783 info.fragments,
2784 info.bytes);
2785
2786 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2787 }
2788
2789
2790 /**
2791 * via_dsp_ioctl_ptr - get information about hardware buffer ptr
2792 * @card: Private info for specified board
2793 * @chan: pointer to channel-specific info
2794 * @arg: user buffer for returned information
2795 *
2796 * Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
2797 *
2798 * Locking: inside card->syscall_mutex
2799 */
2800
2801 static int via_dsp_ioctl_ptr (struct via_info *card,
2802 struct via_channel *chan,
2803 void __user *arg)
2804 {
2805 count_info info;
2806
2807 spin_lock_irq (&card->lock);
2808
2809 info.bytes = chan->bytes;
2810 info.blocks = chan->n_irqs;
2811 chan->n_irqs = 0;
2812
2813 spin_unlock_irq (&card->lock);
2814
2815 if (chan->is_active) {
2816 unsigned long extra;
2817 info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size;
2818 extra = chan->frag_size - via_sg_offset(chan);
2819 info.ptr += extra;
2820 info.bytes += extra;
2821 } else {
2822 info.ptr = 0;
2823 }
2824
2825 DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n",
2826 info.bytes,
2827 info.blocks,
2828 info.ptr);
2829
2830 return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
2831 }
2832
2833
2834 static int via_dsp_ioctl_trigger (struct via_channel *chan, int val)
2835 {
2836 int enable, do_something;
2837
2838 if (chan->is_record)
2839 enable = (val & PCM_ENABLE_INPUT);
2840 else
2841 enable = (val & PCM_ENABLE_OUTPUT);
2842
2843 if (!chan->is_enabled && enable) {
2844 do_something = 1;
2845 } else if (chan->is_enabled && !enable) {
2846 do_something = -1;
2847 } else {
2848 do_something = 0;
2849 }
2850
2851 DPRINTK ("enable=%d, do_something=%d\n",
2852 enable, do_something);
2853
2854 if (chan->is_active && do_something)
2855 return -EINVAL;
2856
2857 if (do_something == 1) {
2858 chan->is_enabled = 1;
2859 via_chan_maybe_start (chan);
2860 DPRINTK ("Triggering input\n");
2861 }
2862
2863 else if (do_something == -1) {
2864 chan->is_enabled = 0;
2865 DPRINTK ("Setup input trigger\n");
2866 }
2867
2868 return 0;
2869 }
2870
2871
2872 static int via_dsp_ioctl (struct inode *inode, struct file *file,
2873 unsigned int cmd, unsigned long arg)
2874 {
2875 int rc, rd=0, wr=0, val=0;
2876 struct via_info *card;
2877 struct via_channel *chan;
2878 int nonblock = (file->f_flags & O_NONBLOCK);
2879 int __user *ip = (int __user *)arg;
2880 void __user *p = (void __user *)arg;
2881
2882 assert (file != NULL);
2883 card = file->private_data;
2884 assert (card != NULL);
2885
2886 if (file->f_mode & FMODE_WRITE)
2887 wr = 1;
2888 if (file->f_mode & FMODE_READ)
2889 rd = 1;
2890
2891 rc = via_syscall_down (card, nonblock);
2892 if (rc)
2893 return rc;
2894 rc = -EINVAL;
2895
2896 switch (cmd) {
2897
2898 /* OSS API version. XXX unverified */
2899 case OSS_GETVERSION:
2900 DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n");
2901 rc = put_user (SOUND_VERSION, ip);
2902 break;
2903
2904 /* list of supported PCM data formats */
2905 case SNDCTL_DSP_GETFMTS:
2906 DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n");
2907 rc = put_user (AFMT_U8 | AFMT_S16_LE, ip);
2908 break;
2909
2910 /* query or set current channel's PCM data format */
2911 case SNDCTL_DSP_SETFMT:
2912 if (get_user(val, ip)) {
2913 rc = -EFAULT;
2914 break;
2915 }
2916 DPRINTK ("DSP_SETFMT, val==%d\n", val);
2917 if (val != AFMT_QUERY) {
2918 rc = 0;
2919
2920 if (rd)
2921 rc = via_chan_set_fmt (card, &card->ch_in, val);
2922
2923 if (rc >= 0 && wr)
2924 rc = via_chan_set_fmt (card, &card->ch_out, val);
2925
2926 if (rc < 0)
2927 break;
2928
2929 val = rc;
2930 } else {
2931 if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) ||
2932 (wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT)))
2933 val = AFMT_S16_LE;
2934 else
2935 val = AFMT_U8;
2936 }
2937 DPRINTK ("SETFMT EXIT, returning %d\n", val);
2938 rc = put_user (val, ip);
2939 break;
2940
2941 /* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */
2942 case SNDCTL_DSP_CHANNELS:
2943 if (get_user(val, ip)) {
2944 rc = -EFAULT;
2945 break;
2946 }
2947 DPRINTK ("DSP_CHANNELS, val==%d\n", val);
2948 if (val != 0) {
2949 rc = 0;
2950
2951 if (rd)
2952 rc = via_chan_set_stereo (card, &card->ch_in, val);
2953
2954 if (rc >= 0 && wr)
2955 rc = via_chan_set_stereo (card, &card->ch_out, val);
2956
2957 if (rc < 0)
2958 break;
2959
2960 val = rc;
2961 } else {
2962 if (rd)
2963 val = card->ch_in.channels;
2964 else
2965 val = card->ch_out.channels;
2966 }
2967 DPRINTK ("CHANNELS EXIT, returning %d\n", val);
2968 rc = put_user (val, ip);
2969 break;
2970
2971 /* enable (val is not zero) or disable (val == 0) stereo */
2972 case SNDCTL_DSP_STEREO:
2973 if (get_user(val, ip)) {
2974 rc = -EFAULT;
2975 break;
2976 }
2977 DPRINTK ("DSP_STEREO, val==%d\n", val);
2978 rc = 0;
2979
2980 if (rd)
2981 rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1);
2982 if (rc >= 0 && wr)
2983 rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1);
2984
2985 if (rc < 0)
2986 break;
2987
2988 val = rc - 1;
2989
2990 DPRINTK ("STEREO EXIT, returning %d\n", val);
2991 rc = put_user(val, ip);
2992 break;
2993
2994 /* query or set sampling rate */
2995 case SNDCTL_DSP_SPEED:
2996 if (get_user(val, ip)) {
2997 rc = -EFAULT;
2998 break;
2999 }
3000 DPRINTK ("DSP_SPEED, val==%d\n", val);
3001 if (val < 0) {
3002 rc = -EINVAL;
3003 break;
3004 }
3005 if (val > 0) {
3006 rc = 0;
3007
3008 if (rd)
3009 rc = via_chan_set_speed (card, &card->ch_in, val);
3010 if (rc >= 0 && wr)
3011 rc = via_chan_set_speed (card, &card->ch_out, val);
3012
3013 if (rc < 0)
3014 break;
3015
3016 val = rc;
3017 } else {
3018 if (rd)
3019 val = card->ch_in.rate;
3020 else if (wr)
3021 val = card->ch_out.rate;
3022 else
3023 val = 0;
3024 }
3025 DPRINTK ("SPEED EXIT, returning %d\n", val);
3026 rc = put_user (val, ip);
3027 break;
3028
3029 /* wait until all buffers have been played, and then stop device */
3030 case SNDCTL_DSP_SYNC:
3031 DPRINTK ("DSP_SYNC\n");
3032 rc = 0;
3033 if (wr) {
3034 DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n");
3035 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3036 }
3037 break;
3038
3039 /* stop recording/playback immediately */
3040 case SNDCTL_DSP_RESET:
3041 DPRINTK ("DSP_RESET\n");
3042 if (rd) {
3043 via_chan_clear (card, &card->ch_in);
3044 card->ch_in.frag_number = 0;
3045 card->ch_in.frag_size = 0;
3046 atomic_set(&card->ch_in.n_frags, 0);
3047 }
3048
3049 if (wr) {
3050 via_chan_clear (card, &card->ch_out);
3051 card->ch_out.frag_number = 0;
3052 card->ch_out.frag_size = 0;
3053 atomic_set(&card->ch_out.n_frags, 0);
3054 }
3055
3056 rc = 0;
3057 break;
3058
3059 case SNDCTL_DSP_NONBLOCK:
3060 file->f_flags |= O_NONBLOCK;
3061 rc = 0;
3062 break;
3063
3064 /* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
3065 case SNDCTL_DSP_GETCAPS:
3066 DPRINTK ("DSP_GETCAPS\n");
3067 rc = put_user(VIA_DSP_CAP, ip);
3068 break;
3069
3070 /* obtain buffer fragment size */
3071 case SNDCTL_DSP_GETBLKSIZE:
3072 DPRINTK ("DSP_GETBLKSIZE\n");
3073
3074 if (rd) {
3075 via_chan_set_buffering(card, &card->ch_in, -1);
3076 rc = put_user(card->ch_in.frag_size, ip);
3077 } else if (wr) {
3078 via_chan_set_buffering(card, &card->ch_out, -1);
3079 rc = put_user(card->ch_out.frag_size, ip);
3080 }
3081 break;
3082
3083 /* obtain information about input buffering */
3084 case SNDCTL_DSP_GETISPACE:
3085 DPRINTK ("DSP_GETISPACE\n");
3086 if (rd)
3087 rc = via_dsp_ioctl_space (card, &card->ch_in, p);
3088 break;
3089
3090 /* obtain information about output buffering */
3091 case SNDCTL_DSP_GETOSPACE:
3092 DPRINTK ("DSP_GETOSPACE\n");
3093 if (wr)
3094 rc = via_dsp_ioctl_space (card, &card->ch_out, p);
3095 break;
3096
3097 /* obtain information about input hardware pointer */
3098 case SNDCTL_DSP_GETIPTR:
3099 DPRINTK ("DSP_GETIPTR\n");
3100 if (rd)
3101 rc = via_dsp_ioctl_ptr (card, &card->ch_in, p);
3102 break;
3103
3104 /* obtain information about output hardware pointer */
3105 case SNDCTL_DSP_GETOPTR:
3106 DPRINTK ("DSP_GETOPTR\n");
3107 if (wr)
3108 rc = via_dsp_ioctl_ptr (card, &card->ch_out, p);
3109 break;
3110
3111 /* return number of bytes remaining to be played by DMA engine */
3112 case SNDCTL_DSP_GETODELAY:
3113 {
3114 DPRINTK ("DSP_GETODELAY\n");
3115
3116 chan = &card->ch_out;
3117
3118 if (!wr)
3119 break;
3120
3121 if (chan->is_active) {
3122
3123 val = chan->frag_number - atomic_read (&chan->n_frags);
3124
3125 assert(val >= 0);
3126
3127 if (val > 0) {
3128 val *= chan->frag_size;
3129 val -= chan->frag_size - via_sg_offset(chan);
3130 }
3131 val += chan->slop_len % chan->frag_size;
3132 } else
3133 val = 0;
3134
3135 assert (val <= (chan->frag_size * chan->frag_number));
3136
3137 DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val);
3138 rc = put_user (val, ip);
3139 break;
3140 }
3141
3142 /* handle the quick-start of a channel,
3143 * or the notification that a quick-start will
3144 * occur in the future
3145 */
3146 case SNDCTL_DSP_SETTRIGGER:
3147 if (get_user(val, ip)) {
3148 rc = -EFAULT;
3149 break;
3150 }
3151 DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n",
3152 rd, wr, card->ch_in.is_active, card->ch_out.is_active,
3153 card->ch_in.is_enabled, card->ch_out.is_enabled);
3154
3155 rc = 0;
3156
3157 if (rd)
3158 rc = via_dsp_ioctl_trigger (&card->ch_in, val);
3159
3160 if (!rc && wr)
3161 rc = via_dsp_ioctl_trigger (&card->ch_out, val);
3162
3163 break;
3164
3165 case SNDCTL_DSP_GETTRIGGER:
3166 val = 0;
3167 if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled)
3168 val |= PCM_ENABLE_INPUT;
3169 if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled)
3170 val |= PCM_ENABLE_OUTPUT;
3171 rc = put_user(val, ip);
3172 break;
3173
3174 /* Enable full duplex. Since we do this as soon as we are opened
3175 * with O_RDWR, this is mainly a no-op that always returns success.
3176 */
3177 case SNDCTL_DSP_SETDUPLEX:
3178 DPRINTK ("DSP_SETDUPLEX\n");
3179 if (!rd || !wr)
3180 break;
3181 rc = 0;
3182 break;
3183
3184 /* set fragment size. implemented as a successful no-op for now */
3185 case SNDCTL_DSP_SETFRAGMENT:
3186 if (get_user(val, ip)) {
3187 rc = -EFAULT;
3188 break;
3189 }
3190 DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val);
3191
3192 if (rd)
3193 rc = via_chan_set_buffering(card, &card->ch_in, val);
3194
3195 if (wr)
3196 rc = via_chan_set_buffering(card, &card->ch_out, val);
3197
3198 DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
3199 val & 0xFFFF,
3200 val & 0xFFFF,
3201 (val >> 16) & 0xFFFF,
3202 (val >> 16) & 0xFFFF);
3203
3204 rc = 0;
3205 break;
3206
3207 /* inform device of an upcoming pause in input (or output). */
3208 case SNDCTL_DSP_POST:
3209 DPRINTK ("DSP_POST\n");
3210 if (wr) {
3211 if (card->ch_out.slop_len > 0)
3212 via_chan_flush_frag (&card->ch_out);
3213 via_chan_maybe_start (&card->ch_out);
3214 }
3215
3216 rc = 0;
3217 break;
3218
3219 /* not implemented */
3220 default:
3221 DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n",
3222 cmd, p);
3223 break;
3224 }
3225
3226 mutex_unlock(&card->syscall_mutex);
3227 DPRINTK ("EXIT, returning %d\n", rc);
3228 return rc;
3229 }
3230
3231
3232 static int via_dsp_open (struct inode *inode, struct file *file)
3233 {
3234 int minor = iminor(inode);
3235 struct via_info *card;
3236 struct pci_dev *pdev = NULL;
3237 struct via_channel *chan;
3238 struct pci_driver *drvr;
3239 int nonblock = (file->f_flags & O_NONBLOCK);
3240
3241 DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
3242
3243 if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) {
3244 DPRINTK ("EXIT, returning -EINVAL\n");
3245 return -EINVAL;
3246 }
3247
3248 card = NULL;
3249 while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
3250 drvr = pci_dev_driver (pdev);
3251 if (drvr == &via_driver) {
3252 assert (pci_get_drvdata (pdev) != NULL);
3253
3254 card = pci_get_drvdata (pdev);
3255 DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
3256 card->dev_dsp, minor,
3257 (card->dev_dsp ^ minor) & ~0xf);
3258
3259 if (((card->dev_dsp ^ minor) & ~0xf) == 0)
3260 goto match;
3261 }
3262 }
3263
3264 DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
3265 return -ENODEV;
3266
3267 match:
3268 pci_dev_put(pdev);
3269 if (nonblock) {
3270 if (!mutex_trylock(&card->open_mutex)) {
3271 DPRINTK ("EXIT, returning -EAGAIN\n");
3272 return -EAGAIN;
3273 }
3274 } else {
3275 if (mutex_lock_interruptible(&card->open_mutex)) {
3276 DPRINTK ("EXIT, returning -ERESTARTSYS\n");
3277 return -ERESTARTSYS;
3278 }
3279 }
3280
3281 file->private_data = card;
3282 DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
3283
3284 /* handle input from analog source */
3285 if (file->f_mode & FMODE_READ) {
3286 chan = &card->ch_in;
3287
3288 via_chan_init (card, chan);
3289
3290 /* why is this forced to 16-bit stereo in all drivers? */
3291 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3292 chan->channels = 2;
3293
3294 // TO DO - use FIFO: via_capture_fifo(card, 1);
3295 via_chan_pcm_fmt (chan, 0);
3296 via_set_rate (card->ac97, chan, 44100);
3297 }
3298
3299 /* handle output to analog source */
3300 if (file->f_mode & FMODE_WRITE) {
3301 chan = &card->ch_out;
3302
3303 via_chan_init (card, chan);
3304
3305 if (file->f_mode & FMODE_READ) {
3306 /* if in duplex mode make the recording and playback channels
3307 have the same settings */
3308 chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
3309 chan->channels = 2;
3310 via_chan_pcm_fmt (chan, 0);
3311 via_set_rate (card->ac97, chan, 44100);
3312 } else {
3313 if ((minor & 0xf) == SND_DEV_DSP16) {
3314 chan->pcm_fmt = VIA_PCM_FMT_16BIT;
3315 via_chan_pcm_fmt (chan, 0);
3316 via_set_rate (card->ac97, chan, 44100);
3317 } else {
3318 via_chan_pcm_fmt (chan, 1);
3319 via_set_rate (card->ac97, chan, 8000);
3320 }
3321 }
3322 }
3323
3324 DPRINTK ("EXIT, returning 0\n");
3325 return nonseekable_open(inode, file);
3326 }
3327
3328
3329 static int via_dsp_release(struct inode *inode, struct file *file)
3330 {
3331 struct via_info *card;
3332 int nonblock = (file->f_flags & O_NONBLOCK);
3333 int rc;
3334
3335 DPRINTK ("ENTER\n");
3336
3337 assert (file != NULL);
3338 card = file->private_data;
3339 assert (card != NULL);
3340
3341 rc = via_syscall_down (card, nonblock);
3342 if (rc) {
3343 DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc);
3344 return rc;
3345 }
3346
3347 if (file->f_mode & FMODE_WRITE) {
3348 rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
3349 if (rc && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */
3350 printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
3351
3352 via_chan_free (card, &card->ch_out);
3353 via_chan_buffer_free(card, &card->ch_out);
3354 }
3355
3356 if (file->f_mode & FMODE_READ) {
3357 via_chan_free (card, &card->ch_in);
3358 via_chan_buffer_free (card, &card->ch_in);
3359 }
3360
3361 mutex_unlock(&card->syscall_mutex);
3362 mutex_unlock(&card->open_mutex);
3363
3364 DPRINTK ("EXIT, returning 0\n");
3365 return 0;
3366 }
3367
3368
3369 /****************************************************************
3370 *
3371 * Chip setup and kernel registration
3372 *
3373 *
3374 */
3375
3376 static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
3377 {
3378 #ifdef CONFIG_MIDI_VIA82CXXX
3379 u8 r42;
3380 #endif
3381 int rc;
3382 struct via_info *card;
3383 static int printed_version;
3384
3385 DPRINTK ("ENTER\n");
3386
3387 if (printed_version++ == 0)
3388 printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n");
3389
3390 rc = pci_enable_device (pdev);
3391 if (rc)
3392 goto err_out;
3393
3394 rc = pci_request_regions (pdev, "via82cxxx_audio");
3395 if (rc)
3396 goto err_out_disable;
3397
3398 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3399 if (rc)
3400 goto err_out_res;
3401 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3402 if (rc)
3403 goto err_out_res;
3404
3405 card = kmalloc (sizeof (*card), GFP_KERNEL);
3406 if (!card) {
3407 printk (KERN_ERR PFX "out of memory, aborting\n");
3408 rc = -ENOMEM;
3409 goto err_out_res;
3410 }
3411
3412 pci_set_drvdata (pdev, card);
3413
3414 memset (card, 0, sizeof (*card));
3415 card->pdev = pdev;
3416 card->baseaddr = pci_resource_start (pdev, 0);
3417 card->card_num = via_num_cards++;
3418 spin_lock_init (&card->lock);
3419 spin_lock_init (&card->ac97_lock);
3420 mutex_init(&card->syscall_mutex);
3421 mutex_init(&card->open_mutex);
3422
3423 /* we must init these now, in case the intr handler needs them */
3424 via_chan_init_defaults (card, &card->ch_out);
3425 via_chan_init_defaults (card, &card->ch_in);
3426 via_chan_init_defaults (card, &card->ch_fm);
3427
3428 /* if BAR 2 is present, chip is Rev H or later,
3429 * which means it has a few extra features */
3430 if (pci_resource_start (pdev, 2) > 0)
3431 card->rev_h = 1;
3432
3433 /* Overkill for now, but more flexible done right */
3434
3435 card->intmask = id->driver_data;
3436 card->legacy = !card->intmask;
3437 card->sixchannel = id->driver_data;
3438
3439 if(card->sixchannel)
3440 printk(KERN_INFO PFX "Six channel audio available\n");
3441 if (pdev->irq < 1) {
3442 printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq);
3443 rc = -ENODEV;
3444 goto err_out_kfree;
3445 }
3446
3447 if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) {
3448 printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n");
3449 rc = -ENODEV;
3450 goto err_out_kfree;
3451 }
3452
3453 pci_set_master(pdev);
3454
3455 /*
3456 * init AC97 mixer and codec
3457 */
3458 rc = via_ac97_init (card);
3459 if (rc) {
3460 printk (KERN_ERR PFX "AC97 init failed, aborting\n");
3461 goto err_out_kfree;
3462 }
3463
3464 /*
3465 * init DSP device
3466 */
3467 rc = via_dsp_init (card);
3468 if (rc) {
3469 printk (KERN_ERR PFX "DSP device init failed, aborting\n");
3470 goto err_out_have_mixer;
3471 }
3472
3473 /*
3474 * init and turn on interrupts, as the last thing we do
3475 */
3476 rc = via_interrupt_init (card);
3477 if (rc) {
3478 printk (KERN_ERR PFX "interrupt init failed, aborting\n");
3479 goto err_out_have_dsp;
3480 }
3481
3482 printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
3483 card->card_num + 1, card->baseaddr, pdev->irq);
3484
3485 #ifdef CONFIG_MIDI_VIA82CXXX
3486 /* Disable by default */
3487 card->midi_info.io_base = 0;
3488
3489 if(card->legacy)
3490 {
3491 pci_read_config_byte (pdev, 0x42, &r42);
3492 /* Disable MIDI interrupt */
3493 pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK);
3494 if (r42 & VIA_CR42_MIDI_ENABLE)
3495 {
3496 if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */
3497 card->midi_info.io_base = pci_resource_start (pdev, 2);
3498 else /* Address selected by byte 0x43 */
3499 {
3500 u8 r43;
3501 pci_read_config_byte (pdev, 0x43, &r43);
3502 card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2);
3503 }
3504
3505 card->midi_info.irq = -pdev->irq;
3506 if (probe_uart401(& card->midi_info, THIS_MODULE))
3507 {
3508 card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc;
3509 pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK);
3510 printk("Enabled Via MIDI\n");
3511 }
3512 }
3513 }
3514 #endif
3515
3516 DPRINTK ("EXIT, returning 0\n");
3517 return 0;
3518
3519 err_out_have_dsp:
3520 via_dsp_cleanup (card);
3521
3522 err_out_have_mixer:
3523 via_ac97_cleanup (card);
3524
3525 err_out_kfree:
3526 #ifndef VIA_NDEBUG
3527 memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
3528 #endif
3529 kfree (card);
3530
3531 err_out_res:
3532 pci_release_regions (pdev);
3533
3534 err_out_disable:
3535 pci_disable_device (pdev);
3536
3537 err_out:
3538 pci_set_drvdata (pdev, NULL);
3539 DPRINTK ("EXIT - returning %d\n", rc);
3540 return rc;
3541 }
3542
3543
3544 static void __devexit via_remove_one (struct pci_dev *pdev)
3545 {
3546 struct via_info *card;
3547
3548 DPRINTK ("ENTER\n");
3549
3550 assert (pdev != NULL);
3551 card = pci_get_drvdata (pdev);
3552 assert (card != NULL);
3553
3554 #ifdef CONFIG_MIDI_VIA82CXXX
3555 if (card->midi_info.io_base)
3556 unload_uart401(&card->midi_info);
3557 #endif
3558
3559 free_irq (card->pdev->irq, card);
3560 via_dsp_cleanup (card);
3561 via_ac97_cleanup (card);
3562
3563 #ifndef VIA_NDEBUG
3564 memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
3565 #endif
3566 kfree (card);
3567
3568 pci_set_drvdata (pdev, NULL);
3569
3570 pci_release_regions (pdev);
3571 pci_disable_device (pdev);
3572 pci_set_power_state (pdev, 3); /* ...zzzzzz */
3573
3574 DPRINTK ("EXIT\n");
3575 return;
3576 }
3577
3578
3579 /****************************************************************
3580 *
3581 * Driver initialization and cleanup
3582 *
3583 *
3584 */
3585
3586 static int __init init_via82cxxx_audio(void)
3587 {
3588 int rc;
3589
3590 DPRINTK ("ENTER\n");
3591
3592 rc = pci_register_driver (&via_driver);
3593 if (rc) {
3594 DPRINTK ("EXIT, returning %d\n", rc);
3595 return rc;
3596 }
3597
3598 DPRINTK ("EXIT, returning 0\n");
3599 return 0;
3600 }
3601
3602
3603 static void __exit cleanup_via82cxxx_audio(void)
3604 {
3605 DPRINTK ("ENTER\n");
3606
3607 pci_unregister_driver (&via_driver);
3608
3609 DPRINTK ("EXIT\n");
3610 }
3611
3612
3613 module_init(init_via82cxxx_audio);
3614 module_exit(cleanup_via82cxxx_audio);
3615
3616 MODULE_AUTHOR("Jeff Garzik");
3617 MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
3618 MODULE_LICENSE("GPL");
3619
Support for the Chinese Samsung S3C2440 based development boards