1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ALSA modem driver for VIA VT82xx (South Bridge)
5 * VT82C686A/B/C, VT8233A/C, VT8235
7 * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
8 * Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
9 * 2002 Takashi Iwai <tiwai@suse.de>
15 * Sep. 2, 2004 Sasha Khapyorsky <sashak@alsa-project.org>
16 * Modified from original audio driver 'via82xx.c' to support AC97
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
23 #include <linux/init.h>
24 #include <linux/pci.h>
25 #include <linux/slab.h>
26 #include <linux/module.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29 #include <sound/pcm_params.h>
30 #include <sound/info.h>
31 #include <sound/ac97_codec.h>
32 #include <sound/initval.h>
38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
39 MODULE_DESCRIPTION("VIA VT82xx modem");
40 MODULE_LICENSE("GPL");
41 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
43 static int index
= -2; /* Exclude the first card */
44 static char *id
= SNDRV_DEFAULT_STR1
; /* ID for this card */
45 static int ac97_clock
= 48000;
47 module_param(index
, int, 0444);
48 MODULE_PARM_DESC(index
, "Index value for VIA 82xx bridge.");
49 module_param(id
, charp
, 0444);
50 MODULE_PARM_DESC(id
, "ID string for VIA 82xx bridge.");
51 module_param(ac97_clock
, int, 0444);
52 MODULE_PARM_DESC(ac97_clock
, "AC'97 codec clock (default 48000Hz).");
54 /* just for backward compatibility */
56 module_param(enable
, bool, 0444);
63 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
64 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
67 #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */
68 #define VIA_REG_STAT_ACTIVE 0x80 /* RO */
69 #define VIA_REG_STAT_PAUSED 0x40 /* RO */
70 #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */
71 #define VIA_REG_STAT_STOPPED 0x04 /* RWC */
72 #define VIA_REG_STAT_EOL 0x02 /* RWC */
73 #define VIA_REG_STAT_FLAG 0x01 /* RWC */
74 #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */
75 #define VIA_REG_CTRL_START 0x80 /* WO */
76 #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */
77 #define VIA_REG_CTRL_AUTOSTART 0x20
78 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */
79 #define VIA_REG_CTRL_INT_STOP 0x04
80 #define VIA_REG_CTRL_INT_EOL 0x02
81 #define VIA_REG_CTRL_INT_FLAG 0x01
82 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */
83 #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
84 #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */
85 #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */
86 #define VIA_REG_TYPE_16BIT 0x20 /* RW */
87 #define VIA_REG_TYPE_STEREO 0x10 /* RW */
88 #define VIA_REG_TYPE_INT_LLINE 0x00
89 #define VIA_REG_TYPE_INT_LSAMPLE 0x04
90 #define VIA_REG_TYPE_INT_LESSONE 0x08
91 #define VIA_REG_TYPE_INT_MASK 0x0c
92 #define VIA_REG_TYPE_INT_EOL 0x02
93 #define VIA_REG_TYPE_INT_FLAG 0x01
94 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */
95 #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */
96 #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */
97 #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */
98 #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */
100 #define DEFINE_VIA_REGSET(name,val) \
102 VIA_REG_##name##_STATUS = (val),\
103 VIA_REG_##name##_CONTROL = (val) + 0x01,\
104 VIA_REG_##name##_TYPE = (val) + 0x02,\
105 VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\
106 VIA_REG_##name##_CURR_PTR = (val) + 0x04,\
107 VIA_REG_##name##_STOP_IDX = (val) + 0x08,\
108 VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\
112 DEFINE_VIA_REGSET(MO
, 0x40);
113 DEFINE_VIA_REGSET(MI
, 0x50);
116 #define VIA_REG_AC97 0x80 /* dword */
117 #define VIA_REG_AC97_CODEC_ID_MASK (3<<30)
118 #define VIA_REG_AC97_CODEC_ID_SHIFT 30
119 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
120 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
121 #define VIA_REG_AC97_SECONDARY_VALID (1<<27)
122 #define VIA_REG_AC97_PRIMARY_VALID (1<<25)
123 #define VIA_REG_AC97_BUSY (1<<24)
124 #define VIA_REG_AC97_READ (1<<23)
125 #define VIA_REG_AC97_CMD_SHIFT 16
126 #define VIA_REG_AC97_CMD_MASK 0x7e
127 #define VIA_REG_AC97_DATA_SHIFT 0
128 #define VIA_REG_AC97_DATA_MASK 0xffff
130 #define VIA_REG_SGD_SHADOW 0x84 /* dword */
131 #define VIA_REG_SGD_STAT_PB_FLAG (1<<0)
132 #define VIA_REG_SGD_STAT_CP_FLAG (1<<1)
133 #define VIA_REG_SGD_STAT_FM_FLAG (1<<2)
134 #define VIA_REG_SGD_STAT_PB_EOL (1<<4)
135 #define VIA_REG_SGD_STAT_CP_EOL (1<<5)
136 #define VIA_REG_SGD_STAT_FM_EOL (1<<6)
137 #define VIA_REG_SGD_STAT_PB_STOP (1<<8)
138 #define VIA_REG_SGD_STAT_CP_STOP (1<<9)
139 #define VIA_REG_SGD_STAT_FM_STOP (1<<10)
140 #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12)
141 #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13)
142 #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14)
143 #define VIA_REG_SGD_STAT_MR_FLAG (1<<16)
144 #define VIA_REG_SGD_STAT_MW_FLAG (1<<17)
145 #define VIA_REG_SGD_STAT_MR_EOL (1<<20)
146 #define VIA_REG_SGD_STAT_MW_EOL (1<<21)
147 #define VIA_REG_SGD_STAT_MR_STOP (1<<24)
148 #define VIA_REG_SGD_STAT_MW_STOP (1<<25)
149 #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28)
150 #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29)
152 #define VIA_REG_GPI_STATUS 0x88
153 #define VIA_REG_GPI_INTR 0x8c
155 #define VIA_TBL_BIT_FLAG 0x40000000
156 #define VIA_TBL_BIT_EOL 0x80000000
159 #define VIA_ACLINK_STAT 0x40
160 #define VIA_ACLINK_C11_READY 0x20
161 #define VIA_ACLINK_C10_READY 0x10
162 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */
163 #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */
164 #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */
165 #define VIA_ACLINK_CTRL 0x41
166 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
167 #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */
168 #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */
169 #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */
170 #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */
171 #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */
172 #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */
173 #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */
174 #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\
175 VIA_ACLINK_CTRL_RESET|\
177 #define VIA_FUNC_ENABLE 0x42
178 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */
179 #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */
180 #define VIA_FUNC_RX2C_WRITE 0x20
181 #define VIA_FUNC_SB_FIFO_EMPTY 0x10
182 #define VIA_FUNC_ENABLE_GAME 0x08
183 #define VIA_FUNC_ENABLE_FM 0x04
184 #define VIA_FUNC_ENABLE_MIDI 0x02
185 #define VIA_FUNC_ENABLE_SB 0x01
186 #define VIA_PNP_CONTROL 0x43
187 #define VIA_MC97_CTRL 0x44
188 #define VIA_MC97_CTRL_ENABLE 0x80
189 #define VIA_MC97_CTRL_SECONDARY 0x40
190 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\
191 VIA_MC97_CTRL_SECONDARY)
198 struct snd_via_sg_table
{
203 #define VIA_TABLE_SIZE 255
206 unsigned int reg_offset
;
208 int direction
; /* playback = 0, capture = 1 */
209 struct snd_pcm_substream
*substream
;
211 unsigned int tbl_entries
; /* # descriptors */
212 struct snd_dma_buffer table
;
213 struct snd_via_sg_table
*idx_table
;
214 /* for recovery from the unexpected pointer */
215 unsigned int lastpos
;
216 unsigned int bufsize
;
217 unsigned int bufsize2
;
220 enum { TYPE_CARD_VIA82XX_MODEM
= 1 };
222 #define VIA_MAX_MODEM_DEVS 2
224 struct via82xx_modem
{
229 unsigned int intr_mask
; /* SGD_SHADOW mask to check interrupts */
232 struct snd_card
*card
;
234 unsigned int num_devs
;
235 unsigned int playback_devno
, capture_devno
;
236 struct viadev devs
[VIA_MAX_MODEM_DEVS
];
238 struct snd_pcm
*pcms
[2];
240 struct snd_ac97_bus
*ac97_bus
;
241 struct snd_ac97
*ac97
;
242 unsigned int ac97_clock
;
243 unsigned int ac97_secondary
; /* secondary AC'97 codec is present */
246 struct snd_info_entry
*proc_entry
;
249 static const struct pci_device_id snd_via82xx_modem_ids
[] = {
250 { PCI_VDEVICE(VIA
, 0x3068), TYPE_CARD_VIA82XX_MODEM
, },
254 MODULE_DEVICE_TABLE(pci
, snd_via82xx_modem_ids
);
260 * allocate and initialize the descriptor buffers
261 * periods = number of periods
262 * fragsize = period size in bytes
264 static int build_via_table(struct viadev
*dev
, struct snd_pcm_substream
*substream
,
266 unsigned int periods
, unsigned int fragsize
)
268 unsigned int i
, idx
, ofs
, rest
;
269 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
272 if (dev
->table
.area
== NULL
) {
273 /* the start of each lists must be aligned to 8 bytes,
274 * but the kernel pages are much bigger, so we don't care
276 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV
, &chip
->pci
->dev
,
277 PAGE_ALIGN(VIA_TABLE_SIZE
* 2 * 8),
281 if (! dev
->idx_table
) {
282 dev
->idx_table
= kmalloc_array(VIA_TABLE_SIZE
,
283 sizeof(*dev
->idx_table
),
285 if (! dev
->idx_table
)
289 /* fill the entries */
292 pgtbl
= (__le32
*)dev
->table
.area
;
293 for (i
= 0; i
< periods
; i
++) {
295 /* fill descriptors for a period.
296 * a period can be split to several descriptors if it's
297 * over page boundary.
304 if (idx
>= VIA_TABLE_SIZE
) {
305 dev_err(&pci
->dev
, "too much table size!\n");
308 addr
= snd_pcm_sgbuf_get_addr(substream
, ofs
);
309 pgtbl
[idx
<< 1] = cpu_to_le32(addr
);
310 r
= PAGE_SIZE
- (ofs
% PAGE_SIZE
);
315 if (i
== periods
- 1)
316 flag
= VIA_TBL_BIT_EOL
; /* buffer boundary */
318 flag
= VIA_TBL_BIT_FLAG
; /* period boundary */
320 flag
= 0; /* period continues to the next */
323 "tbl %d: at %d size %d (rest %d)\n",
326 pgtbl
[(idx
<<1) + 1] = cpu_to_le32(r
| flag
);
327 dev
->idx_table
[idx
].offset
= ofs
;
328 dev
->idx_table
[idx
].size
= r
;
333 dev
->tbl_entries
= idx
;
334 dev
->bufsize
= periods
* fragsize
;
335 dev
->bufsize2
= dev
->bufsize
/ 2;
340 static int clean_via_table(struct viadev
*dev
, struct snd_pcm_substream
*substream
,
343 if (dev
->table
.area
) {
344 snd_dma_free_pages(&dev
->table
);
345 dev
->table
.area
= NULL
;
347 kfree(dev
->idx_table
);
348 dev
->idx_table
= NULL
;
356 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem
*chip
)
358 return inl(VIAREG(chip
, AC97
));
361 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem
*chip
, unsigned int val
)
363 outl(val
, VIAREG(chip
, AC97
));
366 static int snd_via82xx_codec_ready(struct via82xx_modem
*chip
, int secondary
)
368 unsigned int timeout
= 1000; /* 1ms */
371 while (timeout
-- > 0) {
373 if (!((val
= snd_via82xx_codec_xread(chip
)) & VIA_REG_AC97_BUSY
))
376 dev_err(chip
->card
->dev
, "codec_ready: codec %i is not ready [0x%x]\n",
377 secondary
, snd_via82xx_codec_xread(chip
));
381 static int snd_via82xx_codec_valid(struct via82xx_modem
*chip
, int secondary
)
383 unsigned int timeout
= 1000; /* 1ms */
384 unsigned int val
, val1
;
385 unsigned int stat
= !secondary
? VIA_REG_AC97_PRIMARY_VALID
:
386 VIA_REG_AC97_SECONDARY_VALID
;
388 while (timeout
-- > 0) {
389 val
= snd_via82xx_codec_xread(chip
);
390 val1
= val
& (VIA_REG_AC97_BUSY
| stat
);
398 static void snd_via82xx_codec_wait(struct snd_ac97
*ac97
)
400 struct via82xx_modem
*chip
= ac97
->private_data
;
401 __always_unused
int err
;
402 err
= snd_via82xx_codec_ready(chip
, ac97
->num
);
403 /* here we need to wait fairly for long time.. */
407 static void snd_via82xx_codec_write(struct snd_ac97
*ac97
,
411 struct via82xx_modem
*chip
= ac97
->private_data
;
413 if(reg
== AC97_GPIO_STATUS
) {
414 outl(val
, VIAREG(chip
, GPI_STATUS
));
417 xval
= !ac97
->num
? VIA_REG_AC97_CODEC_ID_PRIMARY
: VIA_REG_AC97_CODEC_ID_SECONDARY
;
418 xval
<<= VIA_REG_AC97_CODEC_ID_SHIFT
;
419 xval
|= reg
<< VIA_REG_AC97_CMD_SHIFT
;
420 xval
|= val
<< VIA_REG_AC97_DATA_SHIFT
;
421 snd_via82xx_codec_xwrite(chip
, xval
);
422 snd_via82xx_codec_ready(chip
, ac97
->num
);
425 static unsigned short snd_via82xx_codec_read(struct snd_ac97
*ac97
, unsigned short reg
)
427 struct via82xx_modem
*chip
= ac97
->private_data
;
428 unsigned int xval
, val
= 0xffff;
431 xval
= ac97
->num
<< VIA_REG_AC97_CODEC_ID_SHIFT
;
432 xval
|= ac97
->num
? VIA_REG_AC97_SECONDARY_VALID
: VIA_REG_AC97_PRIMARY_VALID
;
433 xval
|= VIA_REG_AC97_READ
;
434 xval
|= (reg
& 0x7f) << VIA_REG_AC97_CMD_SHIFT
;
437 dev_err(chip
->card
->dev
,
438 "codec_read: codec %i is not valid [0x%x]\n",
439 ac97
->num
, snd_via82xx_codec_xread(chip
));
442 snd_via82xx_codec_xwrite(chip
, xval
);
444 if (snd_via82xx_codec_valid(chip
, ac97
->num
) >= 0) {
446 val
= snd_via82xx_codec_xread(chip
);
453 static void snd_via82xx_channel_reset(struct via82xx_modem
*chip
, struct viadev
*viadev
)
455 outb(VIA_REG_CTRL_PAUSE
| VIA_REG_CTRL_TERMINATE
| VIA_REG_CTRL_RESET
,
456 VIADEV_REG(viadev
, OFFSET_CONTROL
));
457 inb(VIADEV_REG(viadev
, OFFSET_CONTROL
));
459 /* disable interrupts */
460 outb(0x00, VIADEV_REG(viadev
, OFFSET_CONTROL
));
461 /* clear interrupts */
462 outb(0x03, VIADEV_REG(viadev
, OFFSET_STATUS
));
463 outb(0x00, VIADEV_REG(viadev
, OFFSET_TYPE
)); /* for via686 */
464 // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
473 static irqreturn_t
snd_via82xx_interrupt(int irq
, void *dev_id
)
475 struct via82xx_modem
*chip
= dev_id
;
479 status
= inl(VIAREG(chip
, SGD_SHADOW
));
480 if (! (status
& chip
->intr_mask
)) {
485 /* check status for each stream */
486 spin_lock(&chip
->reg_lock
);
487 for (i
= 0; i
< chip
->num_devs
; i
++) {
488 struct viadev
*viadev
= &chip
->devs
[i
];
489 unsigned char c_status
= inb(VIADEV_REG(viadev
, OFFSET_STATUS
));
490 c_status
&= (VIA_REG_STAT_EOL
|VIA_REG_STAT_FLAG
|VIA_REG_STAT_STOPPED
);
493 if (viadev
->substream
&& viadev
->running
) {
494 spin_unlock(&chip
->reg_lock
);
495 snd_pcm_period_elapsed(viadev
->substream
);
496 spin_lock(&chip
->reg_lock
);
498 outb(c_status
, VIADEV_REG(viadev
, OFFSET_STATUS
)); /* ack */
500 spin_unlock(&chip
->reg_lock
);
511 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
513 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
514 struct viadev
*viadev
= substream
->runtime
->private_data
;
515 unsigned char val
= 0;
518 case SNDRV_PCM_TRIGGER_START
:
519 case SNDRV_PCM_TRIGGER_SUSPEND
:
520 val
|= VIA_REG_CTRL_START
;
523 case SNDRV_PCM_TRIGGER_STOP
:
524 val
= VIA_REG_CTRL_TERMINATE
;
527 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
528 val
|= VIA_REG_CTRL_PAUSE
;
531 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
537 outb(val
, VIADEV_REG(viadev
, OFFSET_CONTROL
));
538 if (cmd
== SNDRV_PCM_TRIGGER_STOP
)
539 snd_via82xx_channel_reset(chip
, viadev
);
548 * calculate the linear position at the given sg-buffer index and the rest count
551 #define check_invalid_pos(viadev,pos) \
552 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
553 viadev->lastpos < viadev->bufsize2))
555 static inline unsigned int calc_linear_pos(struct via82xx_modem
*chip
,
556 struct viadev
*viadev
,
560 unsigned int size
, res
;
562 size
= viadev
->idx_table
[idx
].size
;
563 res
= viadev
->idx_table
[idx
].offset
+ size
- count
;
565 /* check the validity of the calculated position */
567 dev_err(chip
->card
->dev
,
568 "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
569 (int)size
, (int)count
);
570 res
= viadev
->lastpos
;
571 } else if (check_invalid_pos(viadev
, res
)) {
573 dev_dbg(chip
->card
->dev
,
574 "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
575 idx
, viadev
->tbl_entries
, viadev
->lastpos
,
576 viadev
->bufsize2
, viadev
->idx_table
[idx
].offset
,
577 viadev
->idx_table
[idx
].size
, count
);
579 if (count
&& size
< count
) {
580 dev_dbg(chip
->card
->dev
,
581 "invalid via82xx_cur_ptr, using last valid pointer\n");
582 res
= viadev
->lastpos
;
585 /* bogus count 0 on the DMA boundary? */
586 res
= viadev
->idx_table
[idx
].offset
;
588 /* count register returns full size
589 * when end of buffer is reached
591 res
= viadev
->idx_table
[idx
].offset
+ size
;
592 if (check_invalid_pos(viadev
, res
)) {
593 dev_dbg(chip
->card
->dev
,
594 "invalid via82xx_cur_ptr (2), using last valid pointer\n");
595 res
= viadev
->lastpos
;
599 viadev
->lastpos
= res
; /* remember the last position */
600 if (res
>= viadev
->bufsize
)
601 res
-= viadev
->bufsize
;
606 * get the current pointer on via686
608 static snd_pcm_uframes_t
snd_via686_pcm_pointer(struct snd_pcm_substream
*substream
)
610 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
611 struct viadev
*viadev
= substream
->runtime
->private_data
;
612 unsigned int idx
, ptr
, count
, res
;
614 if (snd_BUG_ON(!viadev
->tbl_entries
))
616 if (!(inb(VIADEV_REG(viadev
, OFFSET_STATUS
)) & VIA_REG_STAT_ACTIVE
))
619 spin_lock(&chip
->reg_lock
);
620 count
= inl(VIADEV_REG(viadev
, OFFSET_CURR_COUNT
)) & 0xffffff;
621 /* The via686a does not have the current index register,
622 * so we need to calculate the index from CURR_PTR.
624 ptr
= inl(VIADEV_REG(viadev
, OFFSET_CURR_PTR
));
625 if (ptr
<= (unsigned int)viadev
->table
.addr
)
627 else /* CURR_PTR holds the address + 8 */
628 idx
= ((ptr
- (unsigned int)viadev
->table
.addr
) / 8 - 1) %
630 res
= calc_linear_pos(chip
, viadev
, idx
, count
);
631 spin_unlock(&chip
->reg_lock
);
633 return bytes_to_frames(substream
->runtime
, res
);
637 * hw_params callback:
638 * allocate the buffer and build up the buffer description table
640 static int snd_via82xx_hw_params(struct snd_pcm_substream
*substream
,
641 struct snd_pcm_hw_params
*hw_params
)
643 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
644 struct viadev
*viadev
= substream
->runtime
->private_data
;
647 err
= build_via_table(viadev
, substream
, chip
->pci
,
648 params_periods(hw_params
),
649 params_period_bytes(hw_params
));
653 snd_ac97_write(chip
->ac97
, AC97_LINE1_RATE
, params_rate(hw_params
));
654 snd_ac97_write(chip
->ac97
, AC97_LINE1_LEVEL
, 0);
661 * clean up the buffer description table and release the buffer
663 static int snd_via82xx_hw_free(struct snd_pcm_substream
*substream
)
665 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
666 struct viadev
*viadev
= substream
->runtime
->private_data
;
668 clean_via_table(viadev
, substream
, chip
->pci
);
674 * set up the table pointer
676 static void snd_via82xx_set_table_ptr(struct via82xx_modem
*chip
, struct viadev
*viadev
)
678 snd_via82xx_codec_ready(chip
, chip
->ac97_secondary
);
679 outl((u32
)viadev
->table
.addr
, VIADEV_REG(viadev
, OFFSET_TABLE_PTR
));
681 snd_via82xx_codec_ready(chip
, chip
->ac97_secondary
);
685 * prepare callback for playback and capture
687 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream
*substream
)
689 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
690 struct viadev
*viadev
= substream
->runtime
->private_data
;
692 snd_via82xx_channel_reset(chip
, viadev
);
693 /* this must be set after channel_reset */
694 snd_via82xx_set_table_ptr(chip
, viadev
);
695 outb(VIA_REG_TYPE_AUTOSTART
|VIA_REG_TYPE_INT_EOL
|VIA_REG_TYPE_INT_FLAG
,
696 VIADEV_REG(viadev
, OFFSET_TYPE
));
701 * pcm hardware definition, identical for both playback and capture
703 static const struct snd_pcm_hardware snd_via82xx_hw
=
705 .info
= (SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_INTERLEAVED
|
706 SNDRV_PCM_INFO_BLOCK_TRANSFER
|
707 SNDRV_PCM_INFO_MMAP_VALID
|
708 /* SNDRV_PCM_INFO_RESUME | */
709 SNDRV_PCM_INFO_PAUSE
),
710 .formats
= SNDRV_PCM_FMTBIT_U8
| SNDRV_PCM_FMTBIT_S16_LE
,
711 .rates
= SNDRV_PCM_RATE_8000
| SNDRV_PCM_RATE_16000
| SNDRV_PCM_RATE_KNOT
,
716 .buffer_bytes_max
= 128 * 1024,
717 .period_bytes_min
= 32,
718 .period_bytes_max
= 128 * 1024,
720 .periods_max
= VIA_TABLE_SIZE
/ 2,
726 * open callback skeleton
728 static int snd_via82xx_modem_pcm_open(struct via82xx_modem
*chip
, struct viadev
*viadev
,
729 struct snd_pcm_substream
*substream
)
731 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
733 static const unsigned int rates
[] = { 8000, 9600, 12000, 16000 };
734 static const struct snd_pcm_hw_constraint_list hw_constraints_rates
= {
735 .count
= ARRAY_SIZE(rates
),
740 runtime
->hw
= snd_via82xx_hw
;
742 if ((err
= snd_pcm_hw_constraint_list(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
743 &hw_constraints_rates
)) < 0)
746 /* we may remove following constaint when we modify table entries
748 if ((err
= snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
)) < 0)
751 runtime
->private_data
= viadev
;
752 viadev
->substream
= substream
;
759 * open callback for playback
761 static int snd_via82xx_playback_open(struct snd_pcm_substream
*substream
)
763 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
764 struct viadev
*viadev
= &chip
->devs
[chip
->playback_devno
+ substream
->number
];
766 return snd_via82xx_modem_pcm_open(chip
, viadev
, substream
);
770 * open callback for capture
772 static int snd_via82xx_capture_open(struct snd_pcm_substream
*substream
)
774 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
775 struct viadev
*viadev
= &chip
->devs
[chip
->capture_devno
+ substream
->pcm
->device
];
777 return snd_via82xx_modem_pcm_open(chip
, viadev
, substream
);
783 static int snd_via82xx_pcm_close(struct snd_pcm_substream
*substream
)
785 struct viadev
*viadev
= substream
->runtime
->private_data
;
787 viadev
->substream
= NULL
;
792 /* via686 playback callbacks */
793 static const struct snd_pcm_ops snd_via686_playback_ops
= {
794 .open
= snd_via82xx_playback_open
,
795 .close
= snd_via82xx_pcm_close
,
796 .hw_params
= snd_via82xx_hw_params
,
797 .hw_free
= snd_via82xx_hw_free
,
798 .prepare
= snd_via82xx_pcm_prepare
,
799 .trigger
= snd_via82xx_pcm_trigger
,
800 .pointer
= snd_via686_pcm_pointer
,
803 /* via686 capture callbacks */
804 static const struct snd_pcm_ops snd_via686_capture_ops
= {
805 .open
= snd_via82xx_capture_open
,
806 .close
= snd_via82xx_pcm_close
,
807 .hw_params
= snd_via82xx_hw_params
,
808 .hw_free
= snd_via82xx_hw_free
,
809 .prepare
= snd_via82xx_pcm_prepare
,
810 .trigger
= snd_via82xx_pcm_trigger
,
811 .pointer
= snd_via686_pcm_pointer
,
815 static void init_viadev(struct via82xx_modem
*chip
, int idx
, unsigned int reg_offset
,
818 chip
->devs
[idx
].reg_offset
= reg_offset
;
819 chip
->devs
[idx
].direction
= direction
;
820 chip
->devs
[idx
].port
= chip
->port
+ reg_offset
;
824 * create a pcm instance for via686a/b
826 static int snd_via686_pcm_new(struct via82xx_modem
*chip
)
831 chip
->playback_devno
= 0;
832 chip
->capture_devno
= 1;
834 chip
->intr_mask
= 0x330000; /* FLAGS | EOL for MR, MW */
836 err
= snd_pcm_new(chip
->card
, chip
->card
->shortname
, 0, 1, 1, &pcm
);
839 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &snd_via686_playback_ops
);
840 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &snd_via686_capture_ops
);
841 pcm
->dev_class
= SNDRV_PCM_CLASS_MODEM
;
842 pcm
->private_data
= chip
;
843 strcpy(pcm
->name
, chip
->card
->shortname
);
845 init_viadev(chip
, 0, VIA_REG_MO_STATUS
, 0);
846 init_viadev(chip
, 1, VIA_REG_MI_STATUS
, 1);
848 snd_pcm_set_managed_buffer_all(pcm
, SNDRV_DMA_TYPE_DEV_SG
,
849 &chip
->pci
->dev
, 64*1024, 128*1024);
859 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus
*bus
)
861 struct via82xx_modem
*chip
= bus
->private_data
;
862 chip
->ac97_bus
= NULL
;
865 static void snd_via82xx_mixer_free_ac97(struct snd_ac97
*ac97
)
867 struct via82xx_modem
*chip
= ac97
->private_data
;
872 static int snd_via82xx_mixer_new(struct via82xx_modem
*chip
)
874 struct snd_ac97_template ac97
;
876 static const struct snd_ac97_bus_ops ops
= {
877 .write
= snd_via82xx_codec_write
,
878 .read
= snd_via82xx_codec_read
,
879 .wait
= snd_via82xx_codec_wait
,
882 if ((err
= snd_ac97_bus(chip
->card
, 0, &ops
, chip
, &chip
->ac97_bus
)) < 0)
884 chip
->ac97_bus
->private_free
= snd_via82xx_mixer_free_ac97_bus
;
885 chip
->ac97_bus
->clock
= chip
->ac97_clock
;
887 memset(&ac97
, 0, sizeof(ac97
));
888 ac97
.private_data
= chip
;
889 ac97
.private_free
= snd_via82xx_mixer_free_ac97
;
890 ac97
.pci
= chip
->pci
;
891 ac97
.scaps
= AC97_SCAP_SKIP_AUDIO
| AC97_SCAP_POWER_SAVE
;
892 ac97
.num
= chip
->ac97_secondary
;
894 if ((err
= snd_ac97_mixer(chip
->ac97_bus
, &ac97
, &chip
->ac97
)) < 0)
904 static void snd_via82xx_proc_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
906 struct via82xx_modem
*chip
= entry
->private_data
;
909 snd_iprintf(buffer
, "%s\n\n", chip
->card
->longname
);
910 for (i
= 0; i
< 0xa0; i
+= 4) {
911 snd_iprintf(buffer
, "%02x: %08x\n", i
, inl(chip
->port
+ i
));
915 static void snd_via82xx_proc_init(struct via82xx_modem
*chip
)
917 snd_card_ro_proc_new(chip
->card
, "via82xx", chip
,
918 snd_via82xx_proc_read
);
925 static int snd_via82xx_chip_init(struct via82xx_modem
*chip
)
928 unsigned long end_time
;
931 pci_read_config_byte(chip
->pci
, VIA_MC97_CTRL
, &pval
);
932 if((pval
& VIA_MC97_CTRL_INIT
) != VIA_MC97_CTRL_INIT
) {
933 pci_write_config_byte(chip
->pci
, 0x44, pval
|VIA_MC97_CTRL_INIT
);
937 pci_read_config_byte(chip
->pci
, VIA_ACLINK_STAT
, &pval
);
938 if (! (pval
& VIA_ACLINK_C00_READY
)) { /* codec not ready? */
939 /* deassert ACLink reset, force SYNC */
940 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
,
941 VIA_ACLINK_CTRL_ENABLE
|
942 VIA_ACLINK_CTRL_RESET
|
943 VIA_ACLINK_CTRL_SYNC
);
945 #if 1 /* FIXME: should we do full reset here for all chip models? */
946 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, 0x00);
949 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
950 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
,
951 VIA_ACLINK_CTRL_RESET
|VIA_ACLINK_CTRL_SYNC
);
954 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
955 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, VIA_ACLINK_CTRL_INIT
);
959 pci_read_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, &pval
);
960 if ((pval
& VIA_ACLINK_CTRL_INIT
) != VIA_ACLINK_CTRL_INIT
) {
961 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
962 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, VIA_ACLINK_CTRL_INIT
);
966 /* wait until codec ready */
967 end_time
= jiffies
+ msecs_to_jiffies(750);
969 pci_read_config_byte(chip
->pci
, VIA_ACLINK_STAT
, &pval
);
970 if (pval
& VIA_ACLINK_C00_READY
) /* primary codec ready */
972 schedule_timeout_uninterruptible(1);
973 } while (time_before(jiffies
, end_time
));
975 if ((val
= snd_via82xx_codec_xread(chip
)) & VIA_REG_AC97_BUSY
)
976 dev_err(chip
->card
->dev
,
977 "AC'97 codec is not ready [0x%x]\n", val
);
979 snd_via82xx_codec_xwrite(chip
, VIA_REG_AC97_READ
|
980 VIA_REG_AC97_SECONDARY_VALID
|
981 (VIA_REG_AC97_CODEC_ID_SECONDARY
<< VIA_REG_AC97_CODEC_ID_SHIFT
));
982 end_time
= jiffies
+ msecs_to_jiffies(750);
983 snd_via82xx_codec_xwrite(chip
, VIA_REG_AC97_READ
|
984 VIA_REG_AC97_SECONDARY_VALID
|
985 (VIA_REG_AC97_CODEC_ID_SECONDARY
<< VIA_REG_AC97_CODEC_ID_SHIFT
));
987 if ((val
= snd_via82xx_codec_xread(chip
)) & VIA_REG_AC97_SECONDARY_VALID
) {
988 chip
->ac97_secondary
= 1;
991 schedule_timeout_uninterruptible(1);
992 } while (time_before(jiffies
, end_time
));
993 /* This is ok, the most of motherboards have only one codec */
997 /* route FM trap to IRQ, disable FM trap */
998 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
999 /* disable all GPI interrupts */
1000 outl(0, VIAREG(chip
, GPI_INTR
));
1005 #ifdef CONFIG_PM_SLEEP
1009 static int snd_via82xx_suspend(struct device
*dev
)
1011 struct snd_card
*card
= dev_get_drvdata(dev
);
1012 struct via82xx_modem
*chip
= card
->private_data
;
1015 snd_power_change_state(card
, SNDRV_CTL_POWER_D3hot
);
1016 for (i
= 0; i
< chip
->num_devs
; i
++)
1017 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1018 snd_ac97_suspend(chip
->ac97
);
1022 static int snd_via82xx_resume(struct device
*dev
)
1024 struct snd_card
*card
= dev_get_drvdata(dev
);
1025 struct via82xx_modem
*chip
= card
->private_data
;
1028 snd_via82xx_chip_init(chip
);
1030 snd_ac97_resume(chip
->ac97
);
1032 for (i
= 0; i
< chip
->num_devs
; i
++)
1033 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1035 snd_power_change_state(card
, SNDRV_CTL_POWER_D0
);
1039 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm
, snd_via82xx_suspend
, snd_via82xx_resume
);
1040 #define SND_VIA82XX_PM_OPS &snd_via82xx_pm
1042 #define SND_VIA82XX_PM_OPS NULL
1043 #endif /* CONFIG_PM_SLEEP */
1045 static int snd_via82xx_free(struct via82xx_modem
*chip
)
1051 /* disable interrupts */
1052 for (i
= 0; i
< chip
->num_devs
; i
++)
1053 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1057 free_irq(chip
->irq
, chip
);
1058 pci_release_regions(chip
->pci
);
1059 pci_disable_device(chip
->pci
);
1064 static int snd_via82xx_dev_free(struct snd_device
*device
)
1066 struct via82xx_modem
*chip
= device
->device_data
;
1067 return snd_via82xx_free(chip
);
1070 static int snd_via82xx_create(struct snd_card
*card
,
1071 struct pci_dev
*pci
,
1074 unsigned int ac97_clock
,
1075 struct via82xx_modem
**r_via
)
1077 struct via82xx_modem
*chip
;
1079 static const struct snd_device_ops ops
= {
1080 .dev_free
= snd_via82xx_dev_free
,
1083 if ((err
= pci_enable_device(pci
)) < 0)
1086 if ((chip
= kzalloc(sizeof(*chip
), GFP_KERNEL
)) == NULL
) {
1087 pci_disable_device(pci
);
1091 spin_lock_init(&chip
->reg_lock
);
1096 if ((err
= pci_request_regions(pci
, card
->driver
)) < 0) {
1098 pci_disable_device(pci
);
1101 chip
->port
= pci_resource_start(pci
, 0);
1102 if (request_irq(pci
->irq
, snd_via82xx_interrupt
, IRQF_SHARED
,
1103 KBUILD_MODNAME
, chip
)) {
1104 dev_err(card
->dev
, "unable to grab IRQ %d\n", pci
->irq
);
1105 snd_via82xx_free(chip
);
1108 chip
->irq
= pci
->irq
;
1109 card
->sync_irq
= chip
->irq
;
1110 if (ac97_clock
>= 8000 && ac97_clock
<= 48000)
1111 chip
->ac97_clock
= ac97_clock
;
1113 if ((err
= snd_via82xx_chip_init(chip
)) < 0) {
1114 snd_via82xx_free(chip
);
1118 if ((err
= snd_device_new(card
, SNDRV_DEV_LOWLEVEL
, chip
, &ops
)) < 0) {
1119 snd_via82xx_free(chip
);
1123 /* The 8233 ac97 controller does not implement the master bit
1124 * in the pci command register. IMHO this is a violation of the PCI spec.
1125 * We call pci_set_master here because it does not hurt. */
1126 pci_set_master(pci
);
1133 static int snd_via82xx_probe(struct pci_dev
*pci
,
1134 const struct pci_device_id
*pci_id
)
1136 struct snd_card
*card
;
1137 struct via82xx_modem
*chip
;
1138 int chip_type
= 0, card_type
;
1142 err
= snd_card_new(&pci
->dev
, index
, id
, THIS_MODULE
, 0, &card
);
1146 card_type
= pci_id
->driver_data
;
1147 switch (card_type
) {
1148 case TYPE_CARD_VIA82XX_MODEM
:
1149 strcpy(card
->driver
, "VIA82XX-MODEM");
1150 sprintf(card
->shortname
, "VIA 82XX modem");
1153 dev_err(card
->dev
, "invalid card type %d\n", card_type
);
1158 if ((err
= snd_via82xx_create(card
, pci
, chip_type
, pci
->revision
,
1159 ac97_clock
, &chip
)) < 0)
1161 card
->private_data
= chip
;
1162 if ((err
= snd_via82xx_mixer_new(chip
)) < 0)
1165 if ((err
= snd_via686_pcm_new(chip
)) < 0 )
1168 /* disable interrupts */
1169 for (i
= 0; i
< chip
->num_devs
; i
++)
1170 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1172 sprintf(card
->longname
, "%s at 0x%lx, irq %d",
1173 card
->shortname
, chip
->port
, chip
->irq
);
1175 snd_via82xx_proc_init(chip
);
1177 if ((err
= snd_card_register(card
)) < 0) {
1178 snd_card_free(card
);
1181 pci_set_drvdata(pci
, card
);
1185 snd_card_free(card
);
1189 static void snd_via82xx_remove(struct pci_dev
*pci
)
1191 snd_card_free(pci_get_drvdata(pci
));
1194 static struct pci_driver via82xx_modem_driver
= {
1195 .name
= KBUILD_MODNAME
,
1196 .id_table
= snd_via82xx_modem_ids
,
1197 .probe
= snd_via82xx_probe
,
1198 .remove
= snd_via82xx_remove
,
1200 .pm
= SND_VIA82XX_PM_OPS
,
1204 module_pci_driver(via82xx_modem_driver
);