2 * ALSA modem driver for VIA VT82xx (South Bridge)
4 * VT82C686A/B/C, VT8233A/C, VT8235
6 * Copyright (c) 2000 Jaroslav Kysela <perex@suse.cz>
7 * Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
8 * 2002 Takashi Iwai <tiwai@suse.de>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 * Sep. 2, 2004 Sasha Khapyorsky <sashak@alsa-project.org>
30 * Modified from original audio driver 'via82xx.c' to support AC97
34 #include <sound/driver.h>
36 #include <linux/delay.h>
37 #include <linux/interrupt.h>
38 #include <linux/init.h>
39 #include <linux/pci.h>
40 #include <linux/slab.h>
41 #include <linux/moduleparam.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/info.h>
46 #include <sound/ac97_codec.h>
47 #include <sound/initval.h>
53 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
54 MODULE_DESCRIPTION("VIA VT82xx modem");
55 MODULE_LICENSE("GPL");
56 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
58 static int index
= -2; /* Exclude the first card */
59 static char *id
= SNDRV_DEFAULT_STR1
; /* ID for this card */
60 static int ac97_clock
= 48000;
62 module_param(index
, int, 0444);
63 MODULE_PARM_DESC(index
, "Index value for VIA 82xx bridge.");
64 module_param(id
, charp
, 0444);
65 MODULE_PARM_DESC(id
, "ID string for VIA 82xx bridge.");
66 module_param(ac97_clock
, int, 0444);
67 MODULE_PARM_DESC(ac97_clock
, "AC'97 codec clock (default 48000Hz).");
69 /* just for backward compatibility */
71 module_param(enable
, bool, 0444);
78 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
79 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
82 #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */
83 #define VIA_REG_STAT_ACTIVE 0x80 /* RO */
84 #define VIA_REG_STAT_PAUSED 0x40 /* RO */
85 #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */
86 #define VIA_REG_STAT_STOPPED 0x04 /* RWC */
87 #define VIA_REG_STAT_EOL 0x02 /* RWC */
88 #define VIA_REG_STAT_FLAG 0x01 /* RWC */
89 #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */
90 #define VIA_REG_CTRL_START 0x80 /* WO */
91 #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */
92 #define VIA_REG_CTRL_AUTOSTART 0x20
93 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */
94 #define VIA_REG_CTRL_INT_STOP 0x04
95 #define VIA_REG_CTRL_INT_EOL 0x02
96 #define VIA_REG_CTRL_INT_FLAG 0x01
97 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */
98 #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
99 #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */
100 #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */
101 #define VIA_REG_TYPE_16BIT 0x20 /* RW */
102 #define VIA_REG_TYPE_STEREO 0x10 /* RW */
103 #define VIA_REG_TYPE_INT_LLINE 0x00
104 #define VIA_REG_TYPE_INT_LSAMPLE 0x04
105 #define VIA_REG_TYPE_INT_LESSONE 0x08
106 #define VIA_REG_TYPE_INT_MASK 0x0c
107 #define VIA_REG_TYPE_INT_EOL 0x02
108 #define VIA_REG_TYPE_INT_FLAG 0x01
109 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */
110 #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */
111 #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */
112 #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */
113 #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */
115 #define DEFINE_VIA_REGSET(name,val) \
117 VIA_REG_##name##_STATUS = (val),\
118 VIA_REG_##name##_CONTROL = (val) + 0x01,\
119 VIA_REG_##name##_TYPE = (val) + 0x02,\
120 VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\
121 VIA_REG_##name##_CURR_PTR = (val) + 0x04,\
122 VIA_REG_##name##_STOP_IDX = (val) + 0x08,\
123 VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\
127 DEFINE_VIA_REGSET(MO
, 0x40);
128 DEFINE_VIA_REGSET(MI
, 0x50);
131 #define VIA_REG_AC97 0x80 /* dword */
132 #define VIA_REG_AC97_CODEC_ID_MASK (3<<30)
133 #define VIA_REG_AC97_CODEC_ID_SHIFT 30
134 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
135 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
136 #define VIA_REG_AC97_SECONDARY_VALID (1<<27)
137 #define VIA_REG_AC97_PRIMARY_VALID (1<<25)
138 #define VIA_REG_AC97_BUSY (1<<24)
139 #define VIA_REG_AC97_READ (1<<23)
140 #define VIA_REG_AC97_CMD_SHIFT 16
141 #define VIA_REG_AC97_CMD_MASK 0x7e
142 #define VIA_REG_AC97_DATA_SHIFT 0
143 #define VIA_REG_AC97_DATA_MASK 0xffff
145 #define VIA_REG_SGD_SHADOW 0x84 /* dword */
146 #define VIA_REG_SGD_STAT_PB_FLAG (1<<0)
147 #define VIA_REG_SGD_STAT_CP_FLAG (1<<1)
148 #define VIA_REG_SGD_STAT_FM_FLAG (1<<2)
149 #define VIA_REG_SGD_STAT_PB_EOL (1<<4)
150 #define VIA_REG_SGD_STAT_CP_EOL (1<<5)
151 #define VIA_REG_SGD_STAT_FM_EOL (1<<6)
152 #define VIA_REG_SGD_STAT_PB_STOP (1<<8)
153 #define VIA_REG_SGD_STAT_CP_STOP (1<<9)
154 #define VIA_REG_SGD_STAT_FM_STOP (1<<10)
155 #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12)
156 #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13)
157 #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14)
158 #define VIA_REG_SGD_STAT_MR_FLAG (1<<16)
159 #define VIA_REG_SGD_STAT_MW_FLAG (1<<17)
160 #define VIA_REG_SGD_STAT_MR_EOL (1<<20)
161 #define VIA_REG_SGD_STAT_MW_EOL (1<<21)
162 #define VIA_REG_SGD_STAT_MR_STOP (1<<24)
163 #define VIA_REG_SGD_STAT_MW_STOP (1<<25)
164 #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28)
165 #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29)
167 #define VIA_REG_GPI_STATUS 0x88
168 #define VIA_REG_GPI_INTR 0x8c
170 #define VIA_TBL_BIT_FLAG 0x40000000
171 #define VIA_TBL_BIT_EOL 0x80000000
174 #define VIA_ACLINK_STAT 0x40
175 #define VIA_ACLINK_C11_READY 0x20
176 #define VIA_ACLINK_C10_READY 0x10
177 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */
178 #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */
179 #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */
180 #define VIA_ACLINK_CTRL 0x41
181 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
182 #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */
183 #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */
184 #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */
185 #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */
186 #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */
187 #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */
188 #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */
189 #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\
190 VIA_ACLINK_CTRL_RESET|\
192 #define VIA_FUNC_ENABLE 0x42
193 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */
194 #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */
195 #define VIA_FUNC_RX2C_WRITE 0x20
196 #define VIA_FUNC_SB_FIFO_EMPTY 0x10
197 #define VIA_FUNC_ENABLE_GAME 0x08
198 #define VIA_FUNC_ENABLE_FM 0x04
199 #define VIA_FUNC_ENABLE_MIDI 0x02
200 #define VIA_FUNC_ENABLE_SB 0x01
201 #define VIA_PNP_CONTROL 0x43
202 #define VIA_MC97_CTRL 0x44
203 #define VIA_MC97_CTRL_ENABLE 0x80
204 #define VIA_MC97_CTRL_SECONDARY 0x40
205 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\
206 VIA_MC97_CTRL_SECONDARY)
213 struct snd_via_sg_table
{
218 #define VIA_TABLE_SIZE 255
221 unsigned int reg_offset
;
223 int direction
; /* playback = 0, capture = 1 */
224 struct snd_pcm_substream
*substream
;
226 unsigned int tbl_entries
; /* # descriptors */
227 struct snd_dma_buffer table
;
228 struct snd_via_sg_table
*idx_table
;
229 /* for recovery from the unexpected pointer */
230 unsigned int lastpos
;
231 unsigned int bufsize
;
232 unsigned int bufsize2
;
235 enum { TYPE_CARD_VIA82XX_MODEM
= 1 };
237 #define VIA_MAX_MODEM_DEVS 2
239 struct via82xx_modem
{
244 unsigned int intr_mask
; /* SGD_SHADOW mask to check interrupts */
247 struct snd_card
*card
;
249 unsigned int num_devs
;
250 unsigned int playback_devno
, capture_devno
;
251 struct viadev devs
[VIA_MAX_MODEM_DEVS
];
253 struct snd_pcm
*pcms
[2];
255 struct snd_ac97_bus
*ac97_bus
;
256 struct snd_ac97
*ac97
;
257 unsigned int ac97_clock
;
258 unsigned int ac97_secondary
; /* secondary AC'97 codec is present */
261 struct snd_info_entry
*proc_entry
;
264 static struct pci_device_id snd_via82xx_modem_ids
[] = {
265 { 0x1106, 0x3068, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, TYPE_CARD_VIA82XX_MODEM
, },
269 MODULE_DEVICE_TABLE(pci
, snd_via82xx_modem_ids
);
275 * allocate and initialize the descriptor buffers
276 * periods = number of periods
277 * fragsize = period size in bytes
279 static int build_via_table(struct viadev
*dev
, struct snd_pcm_substream
*substream
,
281 unsigned int periods
, unsigned int fragsize
)
283 unsigned int i
, idx
, ofs
, rest
;
284 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
285 struct snd_sg_buf
*sgbuf
= snd_pcm_substream_sgbuf(substream
);
287 if (dev
->table
.area
== NULL
) {
288 /* the start of each lists must be aligned to 8 bytes,
289 * but the kernel pages are much bigger, so we don't care
291 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV
, snd_dma_pci_data(chip
->pci
),
292 PAGE_ALIGN(VIA_TABLE_SIZE
* 2 * 8),
296 if (! dev
->idx_table
) {
297 dev
->idx_table
= kmalloc(sizeof(*dev
->idx_table
) * VIA_TABLE_SIZE
, GFP_KERNEL
);
298 if (! dev
->idx_table
)
302 /* fill the entries */
305 for (i
= 0; i
< periods
; i
++) {
307 /* fill descriptors for a period.
308 * a period can be split to several descriptors if it's
309 * over page boundary.
315 if (idx
>= VIA_TABLE_SIZE
) {
316 snd_printk(KERN_ERR
"via82xx: too much table size!\n");
319 ((u32
*)dev
->table
.area
)[idx
<< 1] = cpu_to_le32((u32
)snd_pcm_sgbuf_get_addr(sgbuf
, ofs
));
320 r
= PAGE_SIZE
- (ofs
% PAGE_SIZE
);
325 if (i
== periods
- 1)
326 flag
= VIA_TBL_BIT_EOL
; /* buffer boundary */
328 flag
= VIA_TBL_BIT_FLAG
; /* period boundary */
330 flag
= 0; /* period continues to the next */
331 // printk("via: tbl %d: at %d size %d (rest %d)\n", idx, ofs, r, rest);
332 ((u32
*)dev
->table
.area
)[(idx
<<1) + 1] = cpu_to_le32(r
| flag
);
333 dev
->idx_table
[idx
].offset
= ofs
;
334 dev
->idx_table
[idx
].size
= r
;
339 dev
->tbl_entries
= idx
;
340 dev
->bufsize
= periods
* fragsize
;
341 dev
->bufsize2
= dev
->bufsize
/ 2;
346 static int clean_via_table(struct viadev
*dev
, struct snd_pcm_substream
*substream
,
349 if (dev
->table
.area
) {
350 snd_dma_free_pages(&dev
->table
);
351 dev
->table
.area
= NULL
;
353 kfree(dev
->idx_table
);
354 dev
->idx_table
= NULL
;
362 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem
*chip
)
364 return inl(VIAREG(chip
, AC97
));
367 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem
*chip
, unsigned int val
)
369 outl(val
, VIAREG(chip
, AC97
));
372 static int snd_via82xx_codec_ready(struct via82xx_modem
*chip
, int secondary
)
374 unsigned int timeout
= 1000; /* 1ms */
377 while (timeout
-- > 0) {
379 if (!((val
= snd_via82xx_codec_xread(chip
)) & VIA_REG_AC97_BUSY
))
382 snd_printk(KERN_ERR
"codec_ready: codec %i is not ready [0x%x]\n",
383 secondary
, snd_via82xx_codec_xread(chip
));
387 static int snd_via82xx_codec_valid(struct via82xx_modem
*chip
, int secondary
)
389 unsigned int timeout
= 1000; /* 1ms */
390 unsigned int val
, val1
;
391 unsigned int stat
= !secondary
? VIA_REG_AC97_PRIMARY_VALID
:
392 VIA_REG_AC97_SECONDARY_VALID
;
394 while (timeout
-- > 0) {
395 val
= snd_via82xx_codec_xread(chip
);
396 val1
= val
& (VIA_REG_AC97_BUSY
| stat
);
404 static void snd_via82xx_codec_wait(struct snd_ac97
*ac97
)
406 struct via82xx_modem
*chip
= ac97
->private_data
;
408 err
= snd_via82xx_codec_ready(chip
, ac97
->num
);
409 /* here we need to wait fairly for long time.. */
413 static void snd_via82xx_codec_write(struct snd_ac97
*ac97
,
417 struct via82xx_modem
*chip
= ac97
->private_data
;
419 if(reg
== AC97_GPIO_STATUS
) {
420 outl(val
, VIAREG(chip
, GPI_STATUS
));
423 xval
= !ac97
->num
? VIA_REG_AC97_CODEC_ID_PRIMARY
: VIA_REG_AC97_CODEC_ID_SECONDARY
;
424 xval
<<= VIA_REG_AC97_CODEC_ID_SHIFT
;
425 xval
|= reg
<< VIA_REG_AC97_CMD_SHIFT
;
426 xval
|= val
<< VIA_REG_AC97_DATA_SHIFT
;
427 snd_via82xx_codec_xwrite(chip
, xval
);
428 snd_via82xx_codec_ready(chip
, ac97
->num
);
431 static unsigned short snd_via82xx_codec_read(struct snd_ac97
*ac97
, unsigned short reg
)
433 struct via82xx_modem
*chip
= ac97
->private_data
;
434 unsigned int xval
, val
= 0xffff;
437 xval
= ac97
->num
<< VIA_REG_AC97_CODEC_ID_SHIFT
;
438 xval
|= ac97
->num
? VIA_REG_AC97_SECONDARY_VALID
: VIA_REG_AC97_PRIMARY_VALID
;
439 xval
|= VIA_REG_AC97_READ
;
440 xval
|= (reg
& 0x7f) << VIA_REG_AC97_CMD_SHIFT
;
443 snd_printk(KERN_ERR
"codec_read: codec %i is not valid [0x%x]\n",
444 ac97
->num
, snd_via82xx_codec_xread(chip
));
447 snd_via82xx_codec_xwrite(chip
, xval
);
449 if (snd_via82xx_codec_valid(chip
, ac97
->num
) >= 0) {
451 val
= snd_via82xx_codec_xread(chip
);
458 static void snd_via82xx_channel_reset(struct via82xx_modem
*chip
, struct viadev
*viadev
)
460 outb(VIA_REG_CTRL_PAUSE
| VIA_REG_CTRL_TERMINATE
| VIA_REG_CTRL_RESET
,
461 VIADEV_REG(viadev
, OFFSET_CONTROL
));
462 inb(VIADEV_REG(viadev
, OFFSET_CONTROL
));
464 /* disable interrupts */
465 outb(0x00, VIADEV_REG(viadev
, OFFSET_CONTROL
));
466 /* clear interrupts */
467 outb(0x03, VIADEV_REG(viadev
, OFFSET_STATUS
));
468 outb(0x00, VIADEV_REG(viadev
, OFFSET_TYPE
)); /* for via686 */
469 // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
478 static irqreturn_t
snd_via82xx_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
)
480 struct via82xx_modem
*chip
= dev_id
;
484 status
= inl(VIAREG(chip
, SGD_SHADOW
));
485 if (! (status
& chip
->intr_mask
)) {
490 /* check status for each stream */
491 spin_lock(&chip
->reg_lock
);
492 for (i
= 0; i
< chip
->num_devs
; i
++) {
493 struct viadev
*viadev
= &chip
->devs
[i
];
494 unsigned char c_status
= inb(VIADEV_REG(viadev
, OFFSET_STATUS
));
495 c_status
&= (VIA_REG_STAT_EOL
|VIA_REG_STAT_FLAG
|VIA_REG_STAT_STOPPED
);
498 if (viadev
->substream
&& viadev
->running
) {
499 spin_unlock(&chip
->reg_lock
);
500 snd_pcm_period_elapsed(viadev
->substream
);
501 spin_lock(&chip
->reg_lock
);
503 outb(c_status
, VIADEV_REG(viadev
, OFFSET_STATUS
)); /* ack */
505 spin_unlock(&chip
->reg_lock
);
516 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
518 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
519 struct viadev
*viadev
= substream
->runtime
->private_data
;
520 unsigned char val
= 0;
523 case SNDRV_PCM_TRIGGER_START
:
524 case SNDRV_PCM_TRIGGER_SUSPEND
:
525 val
|= VIA_REG_CTRL_START
;
528 case SNDRV_PCM_TRIGGER_STOP
:
529 val
= VIA_REG_CTRL_TERMINATE
;
532 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
533 val
|= VIA_REG_CTRL_PAUSE
;
536 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
542 outb(val
, VIADEV_REG(viadev
, OFFSET_CONTROL
));
543 if (cmd
== SNDRV_PCM_TRIGGER_STOP
)
544 snd_via82xx_channel_reset(chip
, viadev
);
553 * calculate the linear position at the given sg-buffer index and the rest count
556 #define check_invalid_pos(viadev,pos) \
557 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
558 viadev->lastpos < viadev->bufsize2))
560 static inline unsigned int calc_linear_pos(struct viadev
*viadev
, unsigned int idx
,
563 unsigned int size
, res
;
565 size
= viadev
->idx_table
[idx
].size
;
566 res
= viadev
->idx_table
[idx
].offset
+ size
- count
;
568 /* check the validity of the calculated position */
570 snd_printd(KERN_ERR
"invalid via82xx_cur_ptr (size = %d, count = %d)\n",
571 (int)size
, (int)count
);
572 res
= viadev
->lastpos
;
573 } else if (check_invalid_pos(viadev
, res
)) {
575 printk(KERN_DEBUG
"fail: idx = %i/%i, lastpos = 0x%x, "
576 "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
577 "count = 0x%x\n", idx
, viadev
->tbl_entries
, viadev
->lastpos
,
578 viadev
->bufsize2
, viadev
->idx_table
[idx
].offset
,
579 viadev
->idx_table
[idx
].size
, count
);
581 if (count
&& size
< count
) {
582 snd_printd(KERN_ERR
"invalid via82xx_cur_ptr, "
583 "using last valid pointer\n");
584 res
= viadev
->lastpos
;
587 /* bogus count 0 on the DMA boundary? */
588 res
= viadev
->idx_table
[idx
].offset
;
590 /* count register returns full size
591 * when end of buffer is reached
593 res
= viadev
->idx_table
[idx
].offset
+ size
;
594 if (check_invalid_pos(viadev
, res
)) {
595 snd_printd(KERN_ERR
"invalid via82xx_cur_ptr (2), "
596 "using last valid pointer\n");
597 res
= viadev
->lastpos
;
601 viadev
->lastpos
= res
; /* remember the last position */
602 if (res
>= viadev
->bufsize
)
603 res
-= viadev
->bufsize
;
608 * get the current pointer on via686
610 static snd_pcm_uframes_t
snd_via686_pcm_pointer(struct snd_pcm_substream
*substream
)
612 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
613 struct viadev
*viadev
= substream
->runtime
->private_data
;
614 unsigned int idx
, ptr
, count
, res
;
616 snd_assert(viadev
->tbl_entries
, return 0);
617 if (!(inb(VIADEV_REG(viadev
, OFFSET_STATUS
)) & VIA_REG_STAT_ACTIVE
))
620 spin_lock(&chip
->reg_lock
);
621 count
= inl(VIADEV_REG(viadev
, OFFSET_CURR_COUNT
)) & 0xffffff;
622 /* The via686a does not have the current index register,
623 * so we need to calculate the index from CURR_PTR.
625 ptr
= inl(VIADEV_REG(viadev
, OFFSET_CURR_PTR
));
626 if (ptr
<= (unsigned int)viadev
->table
.addr
)
628 else /* CURR_PTR holds the address + 8 */
629 idx
= ((ptr
- (unsigned int)viadev
->table
.addr
) / 8 - 1) %
631 res
= calc_linear_pos(viadev
, idx
, count
);
632 spin_unlock(&chip
->reg_lock
);
634 return bytes_to_frames(substream
->runtime
, res
);
638 * hw_params callback:
639 * allocate the buffer and build up the buffer description table
641 static int snd_via82xx_hw_params(struct snd_pcm_substream
*substream
,
642 struct snd_pcm_hw_params
*hw_params
)
644 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
645 struct viadev
*viadev
= substream
->runtime
->private_data
;
648 err
= snd_pcm_lib_malloc_pages(substream
, params_buffer_bytes(hw_params
));
651 err
= build_via_table(viadev
, substream
, chip
->pci
,
652 params_periods(hw_params
),
653 params_period_bytes(hw_params
));
657 snd_ac97_write(chip
->ac97
, AC97_LINE1_RATE
, params_rate(hw_params
));
658 snd_ac97_write(chip
->ac97
, AC97_LINE1_LEVEL
, 0);
665 * clean up the buffer description table and release the buffer
667 static int snd_via82xx_hw_free(struct snd_pcm_substream
*substream
)
669 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
670 struct viadev
*viadev
= substream
->runtime
->private_data
;
672 clean_via_table(viadev
, substream
, chip
->pci
);
673 snd_pcm_lib_free_pages(substream
);
679 * set up the table pointer
681 static void snd_via82xx_set_table_ptr(struct via82xx_modem
*chip
, struct viadev
*viadev
)
683 snd_via82xx_codec_ready(chip
, chip
->ac97_secondary
);
684 outl((u32
)viadev
->table
.addr
, VIADEV_REG(viadev
, OFFSET_TABLE_PTR
));
686 snd_via82xx_codec_ready(chip
, chip
->ac97_secondary
);
690 * prepare callback for playback and capture
692 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream
*substream
)
694 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
695 struct viadev
*viadev
= substream
->runtime
->private_data
;
697 snd_via82xx_channel_reset(chip
, viadev
);
698 /* this must be set after channel_reset */
699 snd_via82xx_set_table_ptr(chip
, viadev
);
700 outb(VIA_REG_TYPE_AUTOSTART
|VIA_REG_TYPE_INT_EOL
|VIA_REG_TYPE_INT_FLAG
,
701 VIADEV_REG(viadev
, OFFSET_TYPE
));
706 * pcm hardware definition, identical for both playback and capture
708 static struct snd_pcm_hardware snd_via82xx_hw
=
710 .info
= (SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_INTERLEAVED
|
711 SNDRV_PCM_INFO_BLOCK_TRANSFER
|
712 SNDRV_PCM_INFO_MMAP_VALID
|
713 /* SNDRV_PCM_INFO_RESUME | */
714 SNDRV_PCM_INFO_PAUSE
),
715 .formats
= SNDRV_PCM_FMTBIT_U8
| SNDRV_PCM_FMTBIT_S16_LE
,
716 .rates
= SNDRV_PCM_RATE_8000
| SNDRV_PCM_RATE_16000
| SNDRV_PCM_RATE_KNOT
,
721 .buffer_bytes_max
= 128 * 1024,
722 .period_bytes_min
= 32,
723 .period_bytes_max
= 128 * 1024,
725 .periods_max
= VIA_TABLE_SIZE
/ 2,
731 * open callback skeleton
733 static int snd_via82xx_modem_pcm_open(struct via82xx_modem
*chip
, struct viadev
*viadev
,
734 struct snd_pcm_substream
*substream
)
736 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
738 static unsigned int rates
[] = { 8000, 9600, 12000, 16000 };
739 static struct snd_pcm_hw_constraint_list hw_constraints_rates
= {
740 .count
= ARRAY_SIZE(rates
),
745 runtime
->hw
= snd_via82xx_hw
;
747 if ((err
= snd_pcm_hw_constraint_list(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
748 &hw_constraints_rates
)) < 0)
751 /* we may remove following constaint when we modify table entries
753 if ((err
= snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
)) < 0)
756 runtime
->private_data
= viadev
;
757 viadev
->substream
= substream
;
764 * open callback for playback
766 static int snd_via82xx_playback_open(struct snd_pcm_substream
*substream
)
768 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
769 struct viadev
*viadev
= &chip
->devs
[chip
->playback_devno
+ substream
->number
];
771 return snd_via82xx_modem_pcm_open(chip
, viadev
, substream
);
775 * open callback for capture
777 static int snd_via82xx_capture_open(struct snd_pcm_substream
*substream
)
779 struct via82xx_modem
*chip
= snd_pcm_substream_chip(substream
);
780 struct viadev
*viadev
= &chip
->devs
[chip
->capture_devno
+ substream
->pcm
->device
];
782 return snd_via82xx_modem_pcm_open(chip
, viadev
, substream
);
788 static int snd_via82xx_pcm_close(struct snd_pcm_substream
*substream
)
790 struct viadev
*viadev
= substream
->runtime
->private_data
;
792 viadev
->substream
= NULL
;
797 /* via686 playback callbacks */
798 static struct snd_pcm_ops snd_via686_playback_ops
= {
799 .open
= snd_via82xx_playback_open
,
800 .close
= snd_via82xx_pcm_close
,
801 .ioctl
= snd_pcm_lib_ioctl
,
802 .hw_params
= snd_via82xx_hw_params
,
803 .hw_free
= snd_via82xx_hw_free
,
804 .prepare
= snd_via82xx_pcm_prepare
,
805 .trigger
= snd_via82xx_pcm_trigger
,
806 .pointer
= snd_via686_pcm_pointer
,
807 .page
= snd_pcm_sgbuf_ops_page
,
810 /* via686 capture callbacks */
811 static struct snd_pcm_ops snd_via686_capture_ops
= {
812 .open
= snd_via82xx_capture_open
,
813 .close
= snd_via82xx_pcm_close
,
814 .ioctl
= snd_pcm_lib_ioctl
,
815 .hw_params
= snd_via82xx_hw_params
,
816 .hw_free
= snd_via82xx_hw_free
,
817 .prepare
= snd_via82xx_pcm_prepare
,
818 .trigger
= snd_via82xx_pcm_trigger
,
819 .pointer
= snd_via686_pcm_pointer
,
820 .page
= snd_pcm_sgbuf_ops_page
,
824 static void init_viadev(struct via82xx_modem
*chip
, int idx
, unsigned int reg_offset
,
827 chip
->devs
[idx
].reg_offset
= reg_offset
;
828 chip
->devs
[idx
].direction
= direction
;
829 chip
->devs
[idx
].port
= chip
->port
+ reg_offset
;
833 * create a pcm instance for via686a/b
835 static int __devinit
snd_via686_pcm_new(struct via82xx_modem
*chip
)
840 chip
->playback_devno
= 0;
841 chip
->capture_devno
= 1;
843 chip
->intr_mask
= 0x330000; /* FLAGS | EOL for MR, MW */
845 err
= snd_pcm_new(chip
->card
, chip
->card
->shortname
, 0, 1, 1, &pcm
);
848 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &snd_via686_playback_ops
);
849 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &snd_via686_capture_ops
);
850 pcm
->dev_class
= SNDRV_PCM_CLASS_MODEM
;
851 pcm
->private_data
= chip
;
852 strcpy(pcm
->name
, chip
->card
->shortname
);
854 init_viadev(chip
, 0, VIA_REG_MO_STATUS
, 0);
855 init_viadev(chip
, 1, VIA_REG_MI_STATUS
, 1);
857 if ((err
= snd_pcm_lib_preallocate_pages_for_all(pcm
, SNDRV_DMA_TYPE_DEV_SG
,
858 snd_dma_pci_data(chip
->pci
),
859 64*1024, 128*1024)) < 0)
871 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus
*bus
)
873 struct via82xx_modem
*chip
= bus
->private_data
;
874 chip
->ac97_bus
= NULL
;
877 static void snd_via82xx_mixer_free_ac97(struct snd_ac97
*ac97
)
879 struct via82xx_modem
*chip
= ac97
->private_data
;
884 static int __devinit
snd_via82xx_mixer_new(struct via82xx_modem
*chip
)
886 struct snd_ac97_template ac97
;
888 static struct snd_ac97_bus_ops ops
= {
889 .write
= snd_via82xx_codec_write
,
890 .read
= snd_via82xx_codec_read
,
891 .wait
= snd_via82xx_codec_wait
,
894 if ((err
= snd_ac97_bus(chip
->card
, 0, &ops
, chip
, &chip
->ac97_bus
)) < 0)
896 chip
->ac97_bus
->private_free
= snd_via82xx_mixer_free_ac97_bus
;
897 chip
->ac97_bus
->clock
= chip
->ac97_clock
;
899 memset(&ac97
, 0, sizeof(ac97
));
900 ac97
.private_data
= chip
;
901 ac97
.private_free
= snd_via82xx_mixer_free_ac97
;
902 ac97
.pci
= chip
->pci
;
903 ac97
.scaps
= AC97_SCAP_SKIP_AUDIO
;
904 ac97
.num
= chip
->ac97_secondary
;
906 if ((err
= snd_ac97_mixer(chip
->ac97_bus
, &ac97
, &chip
->ac97
)) < 0)
916 static void snd_via82xx_proc_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
918 struct via82xx_modem
*chip
= entry
->private_data
;
921 snd_iprintf(buffer
, "%s\n\n", chip
->card
->longname
);
922 for (i
= 0; i
< 0xa0; i
+= 4) {
923 snd_iprintf(buffer
, "%02x: %08x\n", i
, inl(chip
->port
+ i
));
927 static void __devinit
snd_via82xx_proc_init(struct via82xx_modem
*chip
)
929 struct snd_info_entry
*entry
;
931 if (! snd_card_proc_new(chip
->card
, "via82xx", &entry
))
932 snd_info_set_text_ops(entry
, chip
, 1024, snd_via82xx_proc_read
);
939 static int snd_via82xx_chip_init(struct via82xx_modem
*chip
)
942 unsigned long end_time
;
945 pci_read_config_byte(chip
->pci
, VIA_MC97_CTRL
, &pval
);
946 if((pval
& VIA_MC97_CTRL_INIT
) != VIA_MC97_CTRL_INIT
) {
947 pci_write_config_byte(chip
->pci
, 0x44, pval
|VIA_MC97_CTRL_INIT
);
951 pci_read_config_byte(chip
->pci
, VIA_ACLINK_STAT
, &pval
);
952 if (! (pval
& VIA_ACLINK_C00_READY
)) { /* codec not ready? */
953 /* deassert ACLink reset, force SYNC */
954 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
,
955 VIA_ACLINK_CTRL_ENABLE
|
956 VIA_ACLINK_CTRL_RESET
|
957 VIA_ACLINK_CTRL_SYNC
);
959 #if 1 /* FIXME: should we do full reset here for all chip models? */
960 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, 0x00);
963 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
964 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
,
965 VIA_ACLINK_CTRL_RESET
|VIA_ACLINK_CTRL_SYNC
);
968 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
969 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, VIA_ACLINK_CTRL_INIT
);
973 pci_read_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, &pval
);
974 if ((pval
& VIA_ACLINK_CTRL_INIT
) != VIA_ACLINK_CTRL_INIT
) {
975 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
976 pci_write_config_byte(chip
->pci
, VIA_ACLINK_CTRL
, VIA_ACLINK_CTRL_INIT
);
980 /* wait until codec ready */
981 end_time
= jiffies
+ msecs_to_jiffies(750);
983 pci_read_config_byte(chip
->pci
, VIA_ACLINK_STAT
, &pval
);
984 if (pval
& VIA_ACLINK_C00_READY
) /* primary codec ready */
986 schedule_timeout_uninterruptible(1);
987 } while (time_before(jiffies
, end_time
));
989 if ((val
= snd_via82xx_codec_xread(chip
)) & VIA_REG_AC97_BUSY
)
990 snd_printk(KERN_ERR
"AC'97 codec is not ready [0x%x]\n", val
);
992 snd_via82xx_codec_xwrite(chip
, VIA_REG_AC97_READ
|
993 VIA_REG_AC97_SECONDARY_VALID
|
994 (VIA_REG_AC97_CODEC_ID_SECONDARY
<< VIA_REG_AC97_CODEC_ID_SHIFT
));
995 end_time
= jiffies
+ msecs_to_jiffies(750);
996 snd_via82xx_codec_xwrite(chip
, VIA_REG_AC97_READ
|
997 VIA_REG_AC97_SECONDARY_VALID
|
998 (VIA_REG_AC97_CODEC_ID_SECONDARY
<< VIA_REG_AC97_CODEC_ID_SHIFT
));
1000 if ((val
= snd_via82xx_codec_xread(chip
)) & VIA_REG_AC97_SECONDARY_VALID
) {
1001 chip
->ac97_secondary
= 1;
1004 schedule_timeout_interruptible(1);
1005 } while (time_before(jiffies
, end_time
));
1006 /* This is ok, the most of motherboards have only one codec */
1010 /* route FM trap to IRQ, disable FM trap */
1011 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1012 /* disable all GPI interrupts */
1013 outl(0, VIAREG(chip
, GPI_INTR
));
1022 static int snd_via82xx_suspend(struct pci_dev
*pci
, pm_message_t state
)
1024 struct snd_card
*card
= pci_get_drvdata(pci
);
1025 struct via82xx_modem
*chip
= card
->private_data
;
1028 snd_power_change_state(card
, SNDRV_CTL_POWER_D3hot
);
1029 for (i
= 0; i
< 2; i
++)
1030 snd_pcm_suspend_all(chip
->pcms
[i
]);
1031 for (i
= 0; i
< chip
->num_devs
; i
++)
1032 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1033 synchronize_irq(chip
->irq
);
1034 snd_ac97_suspend(chip
->ac97
);
1035 pci_set_power_state(pci
, PCI_D3hot
);
1036 pci_disable_device(pci
);
1037 pci_save_state(pci
);
1041 static int snd_via82xx_resume(struct pci_dev
*pci
)
1043 struct snd_card
*card
= pci_get_drvdata(pci
);
1044 struct via82xx_modem
*chip
= card
->private_data
;
1047 pci_restore_state(pci
);
1048 pci_enable_device(pci
);
1049 pci_set_power_state(pci
, PCI_D0
);
1050 pci_set_master(pci
);
1052 snd_via82xx_chip_init(chip
);
1054 snd_ac97_resume(chip
->ac97
);
1056 for (i
= 0; i
< chip
->num_devs
; i
++)
1057 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1059 snd_power_change_state(card
, SNDRV_CTL_POWER_D0
);
1062 #endif /* CONFIG_PM */
1064 static int snd_via82xx_free(struct via82xx_modem
*chip
)
1070 /* disable interrupts */
1071 for (i
= 0; i
< chip
->num_devs
; i
++)
1072 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1073 synchronize_irq(chip
->irq
);
1076 free_irq(chip
->irq
, chip
);
1077 pci_release_regions(chip
->pci
);
1078 pci_disable_device(chip
->pci
);
1083 static int snd_via82xx_dev_free(struct snd_device
*device
)
1085 struct via82xx_modem
*chip
= device
->device_data
;
1086 return snd_via82xx_free(chip
);
1089 static int __devinit
snd_via82xx_create(struct snd_card
*card
,
1090 struct pci_dev
*pci
,
1093 unsigned int ac97_clock
,
1094 struct via82xx_modem
** r_via
)
1096 struct via82xx_modem
*chip
;
1098 static struct snd_device_ops ops
= {
1099 .dev_free
= snd_via82xx_dev_free
,
1102 if ((err
= pci_enable_device(pci
)) < 0)
1105 if ((chip
= kzalloc(sizeof(*chip
), GFP_KERNEL
)) == NULL
) {
1106 pci_disable_device(pci
);
1110 spin_lock_init(&chip
->reg_lock
);
1115 if ((err
= pci_request_regions(pci
, card
->driver
)) < 0) {
1117 pci_disable_device(pci
);
1120 chip
->port
= pci_resource_start(pci
, 0);
1121 if (request_irq(pci
->irq
, snd_via82xx_interrupt
, SA_INTERRUPT
|SA_SHIRQ
,
1122 card
->driver
, chip
)) {
1123 snd_printk(KERN_ERR
"unable to grab IRQ %d\n", pci
->irq
);
1124 snd_via82xx_free(chip
);
1127 chip
->irq
= pci
->irq
;
1128 if (ac97_clock
>= 8000 && ac97_clock
<= 48000)
1129 chip
->ac97_clock
= ac97_clock
;
1130 synchronize_irq(chip
->irq
);
1132 if ((err
= snd_via82xx_chip_init(chip
)) < 0) {
1133 snd_via82xx_free(chip
);
1137 if ((err
= snd_device_new(card
, SNDRV_DEV_LOWLEVEL
, chip
, &ops
)) < 0) {
1138 snd_via82xx_free(chip
);
1142 /* The 8233 ac97 controller does not implement the master bit
1143 * in the pci command register. IMHO this is a violation of the PCI spec.
1144 * We call pci_set_master here because it does not hurt. */
1145 pci_set_master(pci
);
1147 snd_card_set_dev(card
, &pci
->dev
);
1154 static int __devinit
snd_via82xx_probe(struct pci_dev
*pci
,
1155 const struct pci_device_id
*pci_id
)
1157 struct snd_card
*card
;
1158 struct via82xx_modem
*chip
;
1159 unsigned char revision
;
1160 int chip_type
= 0, card_type
;
1164 card
= snd_card_new(index
, id
, THIS_MODULE
, 0);
1168 card_type
= pci_id
->driver_data
;
1169 pci_read_config_byte(pci
, PCI_REVISION_ID
, &revision
);
1170 switch (card_type
) {
1171 case TYPE_CARD_VIA82XX_MODEM
:
1172 strcpy(card
->driver
, "VIA82XX-MODEM");
1173 sprintf(card
->shortname
, "VIA 82XX modem");
1176 snd_printk(KERN_ERR
"invalid card type %d\n", card_type
);
1181 if ((err
= snd_via82xx_create(card
, pci
, chip_type
, revision
,
1182 ac97_clock
, &chip
)) < 0)
1184 card
->private_data
= chip
;
1185 if ((err
= snd_via82xx_mixer_new(chip
)) < 0)
1188 if ((err
= snd_via686_pcm_new(chip
)) < 0 )
1191 /* disable interrupts */
1192 for (i
= 0; i
< chip
->num_devs
; i
++)
1193 snd_via82xx_channel_reset(chip
, &chip
->devs
[i
]);
1195 sprintf(card
->longname
, "%s at 0x%lx, irq %d",
1196 card
->shortname
, chip
->port
, chip
->irq
);
1198 snd_via82xx_proc_init(chip
);
1200 if ((err
= snd_card_register(card
)) < 0) {
1201 snd_card_free(card
);
1204 pci_set_drvdata(pci
, card
);
1208 snd_card_free(card
);
1212 static void __devexit
snd_via82xx_remove(struct pci_dev
*pci
)
1214 snd_card_free(pci_get_drvdata(pci
));
1215 pci_set_drvdata(pci
, NULL
);
1218 static struct pci_driver driver
= {
1219 .name
= "VIA 82xx Modem",
1220 .id_table
= snd_via82xx_modem_ids
,
1221 .probe
= snd_via82xx_probe
,
1222 .remove
= __devexit_p(snd_via82xx_remove
),
1224 .suspend
= snd_via82xx_suspend
,
1225 .resume
= snd_via82xx_resume
,
1229 static int __init
alsa_card_via82xx_init(void)
1231 return pci_register_driver(&driver
);
1234 static void __exit
alsa_card_via82xx_exit(void)
1236 pci_unregister_driver(&driver
);
1239 module_init(alsa_card_via82xx_init
)
1240 module_exit(alsa_card_via82xx_exit
)