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@smlink.com>
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).");
74 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
75 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
78 #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */
79 #define VIA_REG_STAT_ACTIVE 0x80 /* RO */
80 #define VIA_REG_STAT_PAUSED 0x40 /* RO */
81 #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */
82 #define VIA_REG_STAT_STOPPED 0x04 /* RWC */
83 #define VIA_REG_STAT_EOL 0x02 /* RWC */
84 #define VIA_REG_STAT_FLAG 0x01 /* RWC */
85 #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */
86 #define VIA_REG_CTRL_START 0x80 /* WO */
87 #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */
88 #define VIA_REG_CTRL_AUTOSTART 0x20
89 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */
90 #define VIA_REG_CTRL_INT_STOP 0x04
91 #define VIA_REG_CTRL_INT_EOL 0x02
92 #define VIA_REG_CTRL_INT_FLAG 0x01
93 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */
94 #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
95 #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */
96 #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */
97 #define VIA_REG_TYPE_16BIT 0x20 /* RW */
98 #define VIA_REG_TYPE_STEREO 0x10 /* RW */
99 #define VIA_REG_TYPE_INT_LLINE 0x00
100 #define VIA_REG_TYPE_INT_LSAMPLE 0x04
101 #define VIA_REG_TYPE_INT_LESSONE 0x08
102 #define VIA_REG_TYPE_INT_MASK 0x0c
103 #define VIA_REG_TYPE_INT_EOL 0x02
104 #define VIA_REG_TYPE_INT_FLAG 0x01
105 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */
106 #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */
107 #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */
108 #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */
109 #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */
111 #define DEFINE_VIA_REGSET(name,val) \
113 VIA_REG_##name##_STATUS = (val),\
114 VIA_REG_##name##_CONTROL = (val) + 0x01,\
115 VIA_REG_##name##_TYPE = (val) + 0x02,\
116 VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\
117 VIA_REG_##name##_CURR_PTR = (val) + 0x04,\
118 VIA_REG_##name##_STOP_IDX = (val) + 0x08,\
119 VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\
123 DEFINE_VIA_REGSET(MO, 0x40);
124 DEFINE_VIA_REGSET(MI, 0x50);
127 #define VIA_REG_AC97 0x80 /* dword */
128 #define VIA_REG_AC97_CODEC_ID_MASK (3<<30)
129 #define VIA_REG_AC97_CODEC_ID_SHIFT 30
130 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
131 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
132 #define VIA_REG_AC97_SECONDARY_VALID (1<<27)
133 #define VIA_REG_AC97_PRIMARY_VALID (1<<25)
134 #define VIA_REG_AC97_BUSY (1<<24)
135 #define VIA_REG_AC97_READ (1<<23)
136 #define VIA_REG_AC97_CMD_SHIFT 16
137 #define VIA_REG_AC97_CMD_MASK 0x7e
138 #define VIA_REG_AC97_DATA_SHIFT 0
139 #define VIA_REG_AC97_DATA_MASK 0xffff
141 #define VIA_REG_SGD_SHADOW 0x84 /* dword */
142 #define VIA_REG_SGD_STAT_PB_FLAG (1<<0)
143 #define VIA_REG_SGD_STAT_CP_FLAG (1<<1)
144 #define VIA_REG_SGD_STAT_FM_FLAG (1<<2)
145 #define VIA_REG_SGD_STAT_PB_EOL (1<<4)
146 #define VIA_REG_SGD_STAT_CP_EOL (1<<5)
147 #define VIA_REG_SGD_STAT_FM_EOL (1<<6)
148 #define VIA_REG_SGD_STAT_PB_STOP (1<<8)
149 #define VIA_REG_SGD_STAT_CP_STOP (1<<9)
150 #define VIA_REG_SGD_STAT_FM_STOP (1<<10)
151 #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12)
152 #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13)
153 #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14)
154 #define VIA_REG_SGD_STAT_MR_FLAG (1<<16)
155 #define VIA_REG_SGD_STAT_MW_FLAG (1<<17)
156 #define VIA_REG_SGD_STAT_MR_EOL (1<<20)
157 #define VIA_REG_SGD_STAT_MW_EOL (1<<21)
158 #define VIA_REG_SGD_STAT_MR_STOP (1<<24)
159 #define VIA_REG_SGD_STAT_MW_STOP (1<<25)
160 #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28)
161 #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29)
163 #define VIA_REG_GPI_STATUS 0x88
164 #define VIA_REG_GPI_INTR 0x8c
166 #define VIA_TBL_BIT_FLAG 0x40000000
167 #define VIA_TBL_BIT_EOL 0x80000000
170 #define VIA_ACLINK_STAT 0x40
171 #define VIA_ACLINK_C11_READY 0x20
172 #define VIA_ACLINK_C10_READY 0x10
173 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */
174 #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */
175 #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */
176 #define VIA_ACLINK_CTRL 0x41
177 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
178 #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */
179 #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */
180 #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */
181 #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */
182 #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */
183 #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */
184 #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */
185 #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\
186 VIA_ACLINK_CTRL_RESET|\
188 #define VIA_FUNC_ENABLE 0x42
189 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */
190 #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */
191 #define VIA_FUNC_RX2C_WRITE 0x20
192 #define VIA_FUNC_SB_FIFO_EMPTY 0x10
193 #define VIA_FUNC_ENABLE_GAME 0x08
194 #define VIA_FUNC_ENABLE_FM 0x04
195 #define VIA_FUNC_ENABLE_MIDI 0x02
196 #define VIA_FUNC_ENABLE_SB 0x01
197 #define VIA_PNP_CONTROL 0x43
198 #define VIA_MC97_CTRL 0x44
199 #define VIA_MC97_CTRL_ENABLE 0x80
200 #define VIA_MC97_CTRL_SECONDARY 0x40
201 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\
202 VIA_MC97_CTRL_SECONDARY)
205 typedef struct _snd_via82xx_modem via82xx_t;
206 typedef struct via_dev viadev_t;
212 struct snd_via_sg_table {
217 #define VIA_TABLE_SIZE 255
220 unsigned int reg_offset;
222 int direction; /* playback = 0, capture = 1 */
223 snd_pcm_substream_t *substream;
225 unsigned int tbl_entries; /* # descriptors */
226 struct snd_dma_buffer table;
227 struct snd_via_sg_table *idx_table;
228 /* for recovery from the unexpected pointer */
229 unsigned int lastpos;
230 unsigned int bufsize;
231 unsigned int bufsize2;
234 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
236 #define VIA_MAX_MODEM_DEVS 2
238 struct _snd_via82xx_modem {
243 unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
248 unsigned int num_devs;
249 unsigned int playback_devno, capture_devno;
250 viadev_t devs[VIA_MAX_MODEM_DEVS];
254 ac97_bus_t *ac97_bus;
256 unsigned int ac97_clock;
257 unsigned int ac97_secondary; /* secondary AC'97 codec is present */
260 snd_info_entry_t *proc_entry;
263 static struct pci_device_id snd_via82xx_modem_ids[] = {
264 { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
268 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
274 * allocate and initialize the descriptor buffers
275 * periods = number of periods
276 * fragsize = period size in bytes
278 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
280 unsigned int periods, unsigned int fragsize)
282 unsigned int i, idx, ofs, rest;
283 via82xx_t *chip = snd_pcm_substream_chip(substream);
284 struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
286 if (dev->table.area == NULL) {
287 /* the start of each lists must be aligned to 8 bytes,
288 * but the kernel pages are much bigger, so we don't care
290 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
291 PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
295 if (! dev->idx_table) {
296 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
297 if (! dev->idx_table)
301 /* fill the entries */
304 for (i = 0; i < periods; i++) {
306 /* fill descriptors for a period.
307 * a period can be split to several descriptors if it's
308 * over page boundary.
314 if (idx >= VIA_TABLE_SIZE) {
315 snd_printk(KERN_ERR "via82xx: too much table size!\n");
318 ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
319 r = PAGE_SIZE - (ofs % PAGE_SIZE);
324 if (i == periods - 1)
325 flag = VIA_TBL_BIT_EOL; /* buffer boundary */
327 flag = VIA_TBL_BIT_FLAG; /* period boundary */
329 flag = 0; /* period continues to the next */
330 // printk("via: tbl %d: at %d size %d (rest %d)\n", idx, ofs, r, rest);
331 ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
332 dev->idx_table[idx].offset = ofs;
333 dev->idx_table[idx].size = r;
338 dev->tbl_entries = idx;
339 dev->bufsize = periods * fragsize;
340 dev->bufsize2 = dev->bufsize / 2;
345 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
348 if (dev->table.area) {
349 snd_dma_free_pages(&dev->table);
350 dev->table.area = NULL;
352 kfree(dev->idx_table);
353 dev->idx_table = NULL;
361 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
363 return inl(VIAREG(chip, AC97));
366 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
368 outl(val, VIAREG(chip, AC97));
371 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
373 unsigned int timeout = 1000; /* 1ms */
376 while (timeout-- > 0) {
378 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
381 snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
385 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
387 unsigned int timeout = 1000; /* 1ms */
388 unsigned int val, val1;
389 unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
390 VIA_REG_AC97_SECONDARY_VALID;
392 while (timeout-- > 0) {
393 val = snd_via82xx_codec_xread(chip);
394 val1 = val & (VIA_REG_AC97_BUSY | stat);
402 static void snd_via82xx_codec_wait(ac97_t *ac97)
404 via82xx_t *chip = ac97->private_data;
406 err = snd_via82xx_codec_ready(chip, ac97->num);
407 /* here we need to wait fairly for long time.. */
411 static void snd_via82xx_codec_write(ac97_t *ac97,
415 via82xx_t *chip = ac97->private_data;
417 if(reg == AC97_GPIO_STATUS) {
418 outl(val, VIAREG(chip, GPI_STATUS));
421 xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
422 xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
423 xval |= reg << VIA_REG_AC97_CMD_SHIFT;
424 xval |= val << VIA_REG_AC97_DATA_SHIFT;
425 snd_via82xx_codec_xwrite(chip, xval);
426 snd_via82xx_codec_ready(chip, ac97->num);
429 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
431 via82xx_t *chip = ac97->private_data;
432 unsigned int xval, val = 0xffff;
435 xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
436 xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
437 xval |= VIA_REG_AC97_READ;
438 xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
441 snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
444 snd_via82xx_codec_xwrite(chip, xval);
446 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
448 val = snd_via82xx_codec_xread(chip);
455 static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
457 outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
458 VIADEV_REG(viadev, OFFSET_CONTROL));
459 inb(VIADEV_REG(viadev, OFFSET_CONTROL));
461 /* disable interrupts */
462 outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
463 /* clear interrupts */
464 outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
465 outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
466 // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
475 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
477 via82xx_t *chip = dev_id;
481 status = inl(VIAREG(chip, SGD_SHADOW));
482 if (! (status & chip->intr_mask)) {
487 /* check status for each stream */
488 spin_lock(&chip->reg_lock);
489 for (i = 0; i < chip->num_devs; i++) {
490 viadev_t *viadev = &chip->devs[i];
491 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
492 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
495 if (viadev->substream && viadev->running) {
496 spin_unlock(&chip->reg_lock);
497 snd_pcm_period_elapsed(viadev->substream);
498 spin_lock(&chip->reg_lock);
500 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
502 spin_unlock(&chip->reg_lock);
513 static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
515 via82xx_t *chip = snd_pcm_substream_chip(substream);
516 viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
517 unsigned char val = 0;
520 case SNDRV_PCM_TRIGGER_START:
521 case SNDRV_PCM_TRIGGER_SUSPEND:
522 val |= VIA_REG_CTRL_START;
525 case SNDRV_PCM_TRIGGER_STOP:
526 val = VIA_REG_CTRL_TERMINATE;
529 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
530 val |= VIA_REG_CTRL_PAUSE;
533 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
539 outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
540 if (cmd == SNDRV_PCM_TRIGGER_STOP)
541 snd_via82xx_channel_reset(chip, viadev);
550 * calculate the linear position at the given sg-buffer index and the rest count
553 #define check_invalid_pos(viadev,pos) \
554 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
556 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
558 unsigned int size, res;
560 size = viadev->idx_table[idx].size;
561 res = viadev->idx_table[idx].offset + size - count;
563 /* check the validity of the calculated position */
565 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
566 res = viadev->lastpos;
567 } else if (check_invalid_pos(viadev, res)) {
569 printk("fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count);
571 if (count && size < count) {
572 snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
573 res = viadev->lastpos;
576 /* bogus count 0 on the DMA boundary? */
577 res = viadev->idx_table[idx].offset;
579 /* count register returns full size when end of buffer is reached */
580 res = viadev->idx_table[idx].offset + size;
581 if (check_invalid_pos(viadev, res)) {
582 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
583 res = viadev->lastpos;
587 viadev->lastpos = res; /* remember the last position */
588 if (res >= viadev->bufsize)
589 res -= viadev->bufsize;
594 * get the current pointer on via686
596 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
598 via82xx_t *chip = snd_pcm_substream_chip(substream);
599 viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
600 unsigned int idx, ptr, count, res;
602 snd_assert(viadev->tbl_entries, return 0);
603 if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
606 spin_lock(&chip->reg_lock);
607 count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
608 /* The via686a does not have the current index register,
609 * so we need to calculate the index from CURR_PTR.
611 ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
612 if (ptr <= (unsigned int)viadev->table.addr)
614 else /* CURR_PTR holds the address + 8 */
615 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
616 res = calc_linear_pos(viadev, idx, count);
617 spin_unlock(&chip->reg_lock);
619 return bytes_to_frames(substream->runtime, res);
623 * hw_params callback:
624 * allocate the buffer and build up the buffer description table
626 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
627 snd_pcm_hw_params_t * hw_params)
629 via82xx_t *chip = snd_pcm_substream_chip(substream);
630 viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
633 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
636 err = build_via_table(viadev, substream, chip->pci,
637 params_periods(hw_params),
638 params_period_bytes(hw_params));
642 snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
643 snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
650 * clean up the buffer description table and release the buffer
652 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
654 via82xx_t *chip = snd_pcm_substream_chip(substream);
655 viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
657 clean_via_table(viadev, substream, chip->pci);
658 snd_pcm_lib_free_pages(substream);
664 * set up the table pointer
666 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
668 snd_via82xx_codec_ready(chip, chip->ac97_secondary);
669 outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
671 snd_via82xx_codec_ready(chip, chip->ac97_secondary);
675 * prepare callback for playback and capture
677 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
679 via82xx_t *chip = snd_pcm_substream_chip(substream);
680 viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
682 snd_via82xx_channel_reset(chip, viadev);
683 /* this must be set after channel_reset */
684 snd_via82xx_set_table_ptr(chip, viadev);
685 outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
686 VIADEV_REG(viadev, OFFSET_TYPE));
691 * pcm hardware definition, identical for both playback and capture
693 static snd_pcm_hardware_t snd_via82xx_hw =
695 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
696 SNDRV_PCM_INFO_BLOCK_TRANSFER |
697 SNDRV_PCM_INFO_MMAP_VALID |
698 /* SNDRV_PCM_INFO_RESUME | */
699 SNDRV_PCM_INFO_PAUSE),
700 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
701 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
706 .buffer_bytes_max = 128 * 1024,
707 .period_bytes_min = 32,
708 .period_bytes_max = 128 * 1024,
710 .periods_max = VIA_TABLE_SIZE / 2,
716 * open callback skeleton
718 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
720 snd_pcm_runtime_t *runtime = substream->runtime;
722 static unsigned int rates[] = { 8000, 9600, 12000, 16000 };
723 static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
724 .count = ARRAY_SIZE(rates),
729 runtime->hw = snd_via82xx_hw;
731 if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
734 /* we may remove following constaint when we modify table entries
736 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
739 runtime->private_data = viadev;
740 viadev->substream = substream;
747 * open callback for playback
749 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
751 via82xx_t *chip = snd_pcm_substream_chip(substream);
752 viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
754 return snd_via82xx_modem_pcm_open(chip, viadev, substream);
758 * open callback for capture
760 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
762 via82xx_t *chip = snd_pcm_substream_chip(substream);
763 viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
765 return snd_via82xx_modem_pcm_open(chip, viadev, substream);
771 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
773 viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
775 viadev->substream = NULL;
780 /* via686 playback callbacks */
781 static snd_pcm_ops_t snd_via686_playback_ops = {
782 .open = snd_via82xx_playback_open,
783 .close = snd_via82xx_pcm_close,
784 .ioctl = snd_pcm_lib_ioctl,
785 .hw_params = snd_via82xx_hw_params,
786 .hw_free = snd_via82xx_hw_free,
787 .prepare = snd_via82xx_pcm_prepare,
788 .trigger = snd_via82xx_pcm_trigger,
789 .pointer = snd_via686_pcm_pointer,
790 .page = snd_pcm_sgbuf_ops_page,
793 /* via686 capture callbacks */
794 static snd_pcm_ops_t snd_via686_capture_ops = {
795 .open = snd_via82xx_capture_open,
796 .close = snd_via82xx_pcm_close,
797 .ioctl = snd_pcm_lib_ioctl,
798 .hw_params = snd_via82xx_hw_params,
799 .hw_free = snd_via82xx_hw_free,
800 .prepare = snd_via82xx_pcm_prepare,
801 .trigger = snd_via82xx_pcm_trigger,
802 .pointer = snd_via686_pcm_pointer,
803 .page = snd_pcm_sgbuf_ops_page,
807 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
809 chip->devs[idx].reg_offset = reg_offset;
810 chip->devs[idx].direction = direction;
811 chip->devs[idx].port = chip->port + reg_offset;
815 * create a pcm instance for via686a/b
817 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
822 chip->playback_devno = 0;
823 chip->capture_devno = 1;
825 chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
827 err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
830 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
831 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
832 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
833 pcm->private_data = chip;
834 strcpy(pcm->name, chip->card->shortname);
836 init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
837 init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
839 if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
840 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
852 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
854 via82xx_t *chip = bus->private_data;
855 chip->ac97_bus = NULL;
858 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
860 via82xx_t *chip = ac97->private_data;
865 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
867 ac97_template_t ac97;
869 static ac97_bus_ops_t ops = {
870 .write = snd_via82xx_codec_write,
871 .read = snd_via82xx_codec_read,
872 .wait = snd_via82xx_codec_wait,
875 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
877 chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
878 chip->ac97_bus->clock = chip->ac97_clock;
880 memset(&ac97, 0, sizeof(ac97));
881 ac97.private_data = chip;
882 ac97.private_free = snd_via82xx_mixer_free_ac97;
883 ac97.pci = chip->pci;
884 ac97.scaps = AC97_SCAP_SKIP_AUDIO;
885 ac97.num = chip->ac97_secondary;
887 if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
897 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
899 via82xx_t *chip = entry->private_data;
902 snd_iprintf(buffer, "%s\n\n", chip->card->longname);
903 for (i = 0; i < 0xa0; i += 4) {
904 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
908 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
910 snd_info_entry_t *entry;
912 if (! snd_card_proc_new(chip->card, "via82xx", &entry))
913 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
920 static int snd_via82xx_chip_init(via82xx_t *chip)
923 unsigned long end_time;
926 pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
927 if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
928 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
932 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
933 if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
934 /* deassert ACLink reset, force SYNC */
935 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
936 VIA_ACLINK_CTRL_ENABLE |
937 VIA_ACLINK_CTRL_RESET |
938 VIA_ACLINK_CTRL_SYNC);
940 #if 1 /* FIXME: should we do full reset here for all chip models? */
941 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
944 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
945 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
946 VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
949 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
950 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
954 pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
955 if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
956 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
957 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
961 /* wait until codec ready */
962 end_time = jiffies + msecs_to_jiffies(750);
964 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
965 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
967 set_current_state(TASK_UNINTERRUPTIBLE);
969 } while (time_before(jiffies, end_time));
971 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
972 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
974 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
975 VIA_REG_AC97_SECONDARY_VALID |
976 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
977 end_time = jiffies + msecs_to_jiffies(750);
978 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
979 VIA_REG_AC97_SECONDARY_VALID |
980 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
982 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
983 chip->ac97_secondary = 1;
986 set_current_state(TASK_INTERRUPTIBLE);
988 } while (time_before(jiffies, end_time));
989 /* This is ok, the most of motherboards have only one codec */
993 /* route FM trap to IRQ, disable FM trap */
994 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
995 /* disable all GPI interrupts */
996 outl(0, VIAREG(chip, GPI_INTR));
1005 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1007 via82xx_t *chip = card->pm_private_data;
1010 for (i = 0; i < 2; i++)
1012 snd_pcm_suspend_all(chip->pcms[i]);
1013 for (i = 0; i < chip->num_devs; i++)
1014 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1015 synchronize_irq(chip->irq);
1016 snd_ac97_suspend(chip->ac97);
1017 pci_set_power_state(chip->pci, 3);
1018 pci_disable_device(chip->pci);
1022 static int snd_via82xx_resume(snd_card_t *card)
1024 via82xx_t *chip = card->pm_private_data;
1027 pci_enable_device(chip->pci);
1028 pci_set_power_state(chip->pci, 0);
1029 pci_set_master(chip->pci);
1031 snd_via82xx_chip_init(chip);
1033 snd_ac97_resume(chip->ac97);
1035 for (i = 0; i < chip->num_devs; i++)
1036 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1040 #endif /* CONFIG_PM */
1042 static int snd_via82xx_free(via82xx_t *chip)
1048 /* disable interrupts */
1049 for (i = 0; i < chip->num_devs; i++)
1050 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1051 synchronize_irq(chip->irq);
1054 free_irq(chip->irq, (void *)chip);
1055 pci_release_regions(chip->pci);
1056 pci_disable_device(chip->pci);
1061 static int snd_via82xx_dev_free(snd_device_t *device)
1063 via82xx_t *chip = device->device_data;
1064 return snd_via82xx_free(chip);
1067 static int __devinit snd_via82xx_create(snd_card_t * card,
1068 struct pci_dev *pci,
1071 unsigned int ac97_clock,
1076 static snd_device_ops_t ops = {
1077 .dev_free = snd_via82xx_dev_free,
1080 if ((err = pci_enable_device(pci)) < 0)
1083 if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1084 pci_disable_device(pci);
1088 spin_lock_init(&chip->reg_lock);
1093 if ((err = pci_request_regions(pci, card->driver)) < 0) {
1095 pci_disable_device(pci);
1098 chip->port = pci_resource_start(pci, 0);
1099 if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1100 card->driver, (void *)chip)) {
1101 snd_printk("unable to grab IRQ %d\n", pci->irq);
1102 snd_via82xx_free(chip);
1105 chip->irq = pci->irq;
1106 if (ac97_clock >= 8000 && ac97_clock <= 48000)
1107 chip->ac97_clock = ac97_clock;
1108 synchronize_irq(chip->irq);
1110 if ((err = snd_via82xx_chip_init(chip)) < 0) {
1111 snd_via82xx_free(chip);
1115 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1116 snd_via82xx_free(chip);
1120 /* The 8233 ac97 controller does not implement the master bit
1121 * in the pci command register. IMHO this is a violation of the PCI spec.
1122 * We call pci_set_master here because it does not hurt. */
1123 pci_set_master(pci);
1125 snd_card_set_dev(card, &pci->dev);
1132 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1133 const struct pci_device_id *pci_id)
1137 unsigned char revision;
1138 int chip_type = 0, card_type;
1142 card = snd_card_new(index, id, THIS_MODULE, 0);
1146 card_type = pci_id->driver_data;
1147 pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1148 switch (card_type) {
1149 case TYPE_CARD_VIA82XX_MODEM:
1150 strcpy(card->driver, "VIA82XX-MODEM");
1151 sprintf(card->shortname, "VIA 82XX modem");
1154 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1159 if ((err = snd_via82xx_create(card, pci, chip_type, revision,
1160 ac97_clock, &chip)) < 0)
1162 if ((err = snd_via82xx_mixer_new(chip)) < 0)
1165 if ((err = snd_via686_pcm_new(chip)) < 0 )
1168 snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1170 /* disable interrupts */
1171 for (i = 0; i < chip->num_devs; i++)
1172 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1174 sprintf(card->longname, "%s at 0x%lx, irq %d",
1175 card->shortname, chip->port, chip->irq);
1177 snd_via82xx_proc_init(chip);
1179 if ((err = snd_card_register(card)) < 0) {
1180 snd_card_free(card);
1183 pci_set_drvdata(pci, card);
1187 snd_card_free(card);
1191 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1193 snd_card_free(pci_get_drvdata(pci));
1194 pci_set_drvdata(pci, NULL);
1197 static struct pci_driver driver = {
1198 .name = "VIA 82xx Modem",
1199 .owner = THIS_MODULE,
1200 .id_table = snd_via82xx_modem_ids,
1201 .probe = snd_via82xx_probe,
1202 .remove = __devexit_p(snd_via82xx_remove),
1203 SND_PCI_PM_CALLBACKS
1206 static int __init alsa_card_via82xx_init(void)
1208 return pci_register_driver(&driver);
1211 static void __exit alsa_card_via82xx_exit(void)
1213 pci_unregister_driver(&driver);
1216 module_init(alsa_card_via82xx_init)
1217 module_exit(alsa_card_via82xx_exit)