2 * ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
4 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/delay.h>
24 #include <linux/interrupt.h>
25 #include <linux/init.h>
26 #include <linux/pci.h>
27 #include <linux/slab.h>
28 #include <linux/moduleparam.h>
29 #include <linux/mutex.h>
30 #include <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/info.h>
34 #include <sound/ac97_codec.h>
35 #include <sound/initval.h>
37 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
38 MODULE_DESCRIPTION("ATI IXP MC97 controller");
39 MODULE_LICENSE("GPL");
40 MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
42 static int index = -2; /* Exclude the first card */
43 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
44 static int ac97_clock = 48000;
46 module_param(index, int, 0444);
47 MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
48 module_param(id, charp, 0444);
49 MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
50 module_param(ac97_clock, int, 0444);
51 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
53 /* just for backward compatibility */
55 module_param(enable, bool, 0444);
61 #define ATI_REG_ISR 0x00 /* interrupt source */
62 #define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0)
63 #define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1)
64 #define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2)
65 #define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3)
66 #define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4)
67 #define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5)
68 #define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6)
69 #define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7)
70 #define ATI_REG_ISR_PHYS_INTR (1U<<8)
71 #define ATI_REG_ISR_PHYS_MISMATCH (1U<<9)
72 #define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10)
73 #define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11)
74 #define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12)
75 #define ATI_REG_ISR_NEW_FRAME (1U<<13)
76 #define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14)
78 #define ATI_REG_IER 0x04 /* interrupt enable */
79 #define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0)
80 #define ATI_REG_IER_MODEM_STATUS_EN (1U<<1)
81 #define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)
82 #define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)
83 #define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)
84 #define ATI_REG_IER_PHYS_INTR_EN (1U<<8)
85 #define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9)
86 #define ATI_REG_IER_CODEC0_INTR_EN (1U<<10)
87 #define ATI_REG_IER_CODEC1_INTR_EN (1U<<11)
88 #define ATI_REG_IER_CODEC2_INTR_EN (1U<<12)
89 #define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */
90 #define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */
91 #define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)
93 #define ATI_REG_CMD 0x08 /* command */
94 #define ATI_REG_CMD_POWERDOWN (1U<<0)
95 #define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */
96 #define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */
97 #define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */
98 #define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */
99 #define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */
100 #define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */
101 #define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */
102 #define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */
103 #define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */
104 #define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
105 #define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */
106 #define ATI_REG_CMD_LOOPBACK_EN (1U<<23)
107 #define ATI_REG_CMD_PACKED_DIS (1U<<24)
108 #define ATI_REG_CMD_BURST_EN (1U<<25)
109 #define ATI_REG_CMD_PANIC_EN (1U<<26)
110 #define ATI_REG_CMD_MODEM_PRESENT (1U<<27)
111 #define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28)
112 #define ATI_REG_CMD_AC_SOFT_RESET (1U<<29)
113 #define ATI_REG_CMD_AC_SYNC (1U<<30)
114 #define ATI_REG_CMD_AC_RESET (1U<<31)
116 #define ATI_REG_PHYS_OUT_ADDR 0x0c
117 #define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0)
118 #define ATI_REG_PHYS_OUT_RW (1U<<2)
119 #define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8)
120 #define ATI_REG_PHYS_OUT_ADDR_SHIFT 9
121 #define ATI_REG_PHYS_OUT_DATA_SHIFT 16
123 #define ATI_REG_PHYS_IN_ADDR 0x10
124 #define ATI_REG_PHYS_IN_READ_FLAG (1U<<8)
125 #define ATI_REG_PHYS_IN_ADDR_SHIFT 9
126 #define ATI_REG_PHYS_IN_DATA_SHIFT 16
128 #define ATI_REG_SLOTREQ 0x14
130 #define ATI_REG_COUNTER 0x18
131 #define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */
132 #define ATI_REG_COUNTER_BITCLOCK (31U<<8)
134 #define ATI_REG_IN_FIFO_THRESHOLD 0x1c
136 #define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20
137 #define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */
138 #define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */
139 #define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */
140 #define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30
141 #define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */
142 #define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16)
143 #define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16
144 #define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38
145 #define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c
146 #define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40
147 #define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44
148 #define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48
149 #define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c
150 #define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50
151 #define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54
152 #define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58
153 #define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c
154 #define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60
155 #define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64
156 #define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68
157 #define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c
158 #define ATI_REG_MODEM_OUT_FIFO_USED 0x70
159 #define ATI_REG_MODEM_OUT_GPIO 0x74
160 #define ATI_REG_MODEM_OUT_GPIO_EN 1
161 #define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
162 #define ATI_REG_MODEM_IN_GPIO 0x78
164 #define ATI_REG_MODEM_MIRROR 0x7c
165 #define ATI_REG_AUDIO_MIRROR 0x80
167 #define ATI_REG_MODEM_FIFO_FLUSH 0x88
168 #define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0)
169 #define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1)
170 #define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2)
171 #define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3)
174 #define ATI_REG_LINKPTR_EN (1U<<0)
176 #define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
182 * DMA packate descriptor
185 struct atiixp_dma_desc {
186 u32 addr; /* DMA buffer address */
187 u16 status; /* status bits */
188 u16 size; /* size of the packet in dwords */
189 u32 next; /* address of the next packet descriptor */
195 enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
196 enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
197 enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
199 #define NUM_ATI_CODECS 3
203 * constants and callbacks for each DMA type
205 struct atiixp_dma_ops {
206 int type; /* ATI_DMA_XXX */
207 unsigned int llp_offset; /* LINKPTR offset */
208 unsigned int dt_cur; /* DT_CUR offset */
209 /* called from open callback */
210 void (*enable_dma)(struct atiixp_modem *chip, int on);
211 /* called from trigger (START/STOP) */
212 void (*enable_transfer)(struct atiixp_modem *chip, int on);
213 /* called from trigger (STOP only) */
214 void (*flush_dma)(struct atiixp_modem *chip);
221 const struct atiixp_dma_ops *ops;
222 struct snd_dma_buffer desc_buf;
223 struct snd_pcm_substream *substream; /* assigned PCM substream */
224 unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */
225 unsigned int period_bytes, periods;
229 int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
235 struct atiixp_modem {
236 struct snd_card *card;
239 struct resource *res; /* memory i/o */
241 void __iomem *remap_addr;
244 struct snd_ac97_bus *ac97_bus;
245 struct snd_ac97 *ac97[NUM_ATI_CODECS];
249 struct atiixp_dma dmas[NUM_ATI_DMAS];
250 struct ac97_pcm *pcms[NUM_ATI_PCMS];
251 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
253 int max_channels; /* max. channels for PCM out */
255 unsigned int codec_not_ready_bits; /* for codec detection */
257 int spdif_over_aclink; /* passed from the module option */
258 struct mutex open_mutex; /* playback open mutex */
264 static struct pci_device_id snd_atiixp_ids[] = {
265 { 0x1002, 0x434d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB200 */
266 { 0x1002, 0x4378, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB400 */
270 MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
278 * update the bits of the given register.
279 * return 1 if the bits changed.
281 static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
282 unsigned int mask, unsigned int value)
284 void __iomem *addr = chip->remap_addr + reg;
285 unsigned int data, old_data;
286 old_data = data = readl(addr);
289 if (old_data == data)
296 * macros for easy use
298 #define atiixp_write(chip,reg,value) \
299 writel(value, chip->remap_addr + ATI_REG_##reg)
300 #define atiixp_read(chip,reg) \
301 readl(chip->remap_addr + ATI_REG_##reg)
302 #define atiixp_update(chip,reg,mask,val) \
303 snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
306 * handling DMA packets
308 * we allocate a linear buffer for the DMA, and split it to each packet.
309 * in a future version, a scatter-gather buffer should be implemented.
312 #define ATI_DESC_LIST_SIZE \
313 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
316 * build packets ring for the given buffer size.
318 * IXP handles the buffer descriptors, which are connected as a linked
319 * list. although we can change the list dynamically, in this version,
320 * a static RING of buffer descriptors is used.
322 * the ring is built in this function, and is set up to the hardware.
324 static int atiixp_build_dma_packets(struct atiixp_modem *chip,
325 struct atiixp_dma *dma,
326 struct snd_pcm_substream *substream,
327 unsigned int periods,
328 unsigned int period_bytes)
334 if (periods > ATI_MAX_DESCRIPTORS)
337 if (dma->desc_buf.area == NULL) {
338 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
339 ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)
341 dma->period_bytes = dma->periods = 0; /* clear */
344 if (dma->periods == periods && dma->period_bytes == period_bytes)
347 /* reset DMA before changing the descriptor table */
348 spin_lock_irqsave(&chip->reg_lock, flags);
349 writel(0, chip->remap_addr + dma->ops->llp_offset);
350 dma->ops->enable_dma(chip, 0);
351 dma->ops->enable_dma(chip, 1);
352 spin_unlock_irqrestore(&chip->reg_lock, flags);
354 /* fill the entries */
355 addr = (u32)substream->runtime->dma_addr;
356 desc_addr = (u32)dma->desc_buf.addr;
357 for (i = 0; i < periods; i++) {
358 struct atiixp_dma_desc *desc;
359 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
360 desc->addr = cpu_to_le32(addr);
362 desc->size = period_bytes >> 2; /* in dwords */
363 desc_addr += sizeof(struct atiixp_dma_desc);
364 if (i == periods - 1)
365 desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
367 desc->next = cpu_to_le32(desc_addr);
368 addr += period_bytes;
371 writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
372 chip->remap_addr + dma->ops->llp_offset);
374 dma->period_bytes = period_bytes;
375 dma->periods = periods;
381 * remove the ring buffer and release it if assigned
383 static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
384 struct atiixp_dma *dma,
385 struct snd_pcm_substream *substream)
387 if (dma->desc_buf.area) {
388 writel(0, chip->remap_addr + dma->ops->llp_offset);
389 snd_dma_free_pages(&dma->desc_buf);
390 dma->desc_buf.area = NULL;
397 static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
401 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
403 snd_printk(KERN_WARNING "atiixp-modem: codec acquire timeout\n");
411 static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
412 unsigned short codec,
418 if (snd_atiixp_acquire_codec(chip) < 0)
420 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
421 ATI_REG_PHYS_OUT_ADDR_EN |
422 ATI_REG_PHYS_OUT_RW |
424 atiixp_write(chip, PHYS_OUT_ADDR, data);
425 if (snd_atiixp_acquire_codec(chip) < 0)
429 data = atiixp_read(chip, PHYS_IN_ADDR);
430 if (data & ATI_REG_PHYS_IN_READ_FLAG)
431 return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
434 /* time out may happen during reset */
436 snd_printk(KERN_WARNING "atiixp-modem: codec read timeout (reg %x)\n", reg);
441 static void snd_atiixp_codec_write(struct atiixp_modem *chip,
442 unsigned short codec,
443 unsigned short reg, unsigned short val)
447 if (snd_atiixp_acquire_codec(chip) < 0)
449 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
450 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
451 ATI_REG_PHYS_OUT_ADDR_EN | codec;
452 atiixp_write(chip, PHYS_OUT_ADDR, data);
456 static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
459 struct atiixp_modem *chip = ac97->private_data;
460 return snd_atiixp_codec_read(chip, ac97->num, reg);
464 static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
467 struct atiixp_modem *chip = ac97->private_data;
468 if (reg == AC97_GPIO_STATUS) {
469 atiixp_write(chip, MODEM_OUT_GPIO,
470 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
473 snd_atiixp_codec_write(chip, ac97->num, reg, val);
479 static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
483 /* reset powerdoewn */
484 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
487 /* perform a software reset */
488 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
489 atiixp_read(chip, CMD);
491 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
494 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
495 /* do a hard reset */
496 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
497 ATI_REG_CMD_AC_SYNC);
498 atiixp_read(chip, CMD);
500 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
502 snd_printk(KERN_ERR "atiixp-modem: codec reset timeout\n");
507 /* deassert RESET and assert SYNC to make sure */
508 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
509 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
515 static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
517 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
519 atiixp_update(chip, CMD,
520 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
521 ATI_REG_CMD_POWERDOWN);
527 * auto-detection of codecs
529 * the IXP chip can generate interrupts for the non-existing codecs.
530 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
531 * even if all three codecs are connected.
534 #define ALL_CODEC_NOT_READY \
535 (ATI_REG_ISR_CODEC0_NOT_READY |\
536 ATI_REG_ISR_CODEC1_NOT_READY |\
537 ATI_REG_ISR_CODEC2_NOT_READY)
538 #define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
540 static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
544 chip->codec_not_ready_bits = 0;
545 atiixp_write(chip, IER, CODEC_CHECK_BITS);
546 /* wait for the interrupts */
548 while (timeout-- > 0) {
550 if (chip->codec_not_ready_bits)
553 atiixp_write(chip, IER, 0); /* disable irqs */
555 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
556 snd_printk(KERN_ERR "atiixp-modem: no codec detected!\n");
564 * enable DMA and irqs
566 static int snd_atiixp_chip_start(struct atiixp_modem *chip)
570 /* set up spdif, enable burst mode */
571 reg = atiixp_read(chip, CMD);
572 reg |= ATI_REG_CMD_BURST_EN;
573 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
574 reg |= ATI_REG_CMD_MODEM_PRESENT;
575 atiixp_write(chip, CMD, reg);
577 /* clear all interrupt source */
578 atiixp_write(chip, ISR, 0xffffffff);
580 atiixp_write(chip, IER,
581 ATI_REG_IER_MODEM_STATUS_EN |
582 ATI_REG_IER_MODEM_IN_XRUN_EN |
583 ATI_REG_IER_MODEM_OUT1_XRUN_EN);
589 * disable DMA and IRQs
591 static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
593 /* clear interrupt source */
594 atiixp_write(chip, ISR, atiixp_read(chip, ISR));
596 atiixp_write(chip, IER, 0);
606 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
607 * position. when SG-buffer is implemented, the offset must be calculated
610 static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
612 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 struct atiixp_dma *dma = runtime->private_data;
619 curptr = readl(chip->remap_addr + dma->ops->dt_cur);
620 if (curptr < dma->buf_addr)
622 curptr -= dma->buf_addr;
623 if (curptr >= dma->buf_bytes)
625 return bytes_to_frames(runtime, curptr);
627 snd_printd("atiixp-modem: invalid DMA pointer read 0x%x (buf=%x)\n",
628 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
633 * XRUN detected, and stop the PCM substream
635 static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
636 struct atiixp_dma *dma)
638 if (! dma->substream || ! dma->running)
640 snd_printdd("atiixp-modem: XRUN detected (DMA %d)\n", dma->ops->type);
641 snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
645 * the period ack. update the substream.
647 static void snd_atiixp_update_dma(struct atiixp_modem *chip,
648 struct atiixp_dma *dma)
650 if (! dma->substream || ! dma->running)
652 snd_pcm_period_elapsed(dma->substream);
655 /* set BUS_BUSY interrupt bit if any DMA is running */
656 /* call with spinlock held */
657 static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
659 unsigned int bus_busy;
660 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
661 ATI_REG_CMD_MODEM_RECEIVE_EN))
662 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
665 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
668 /* common trigger callback
669 * calling the lowlevel callbacks in it
671 static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
673 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
674 struct atiixp_dma *dma = substream->runtime->private_data;
677 snd_assert(dma->ops->enable_transfer && dma->ops->flush_dma, return -EINVAL);
679 spin_lock(&chip->reg_lock);
681 case SNDRV_PCM_TRIGGER_START:
682 dma->ops->enable_transfer(chip, 1);
685 case SNDRV_PCM_TRIGGER_STOP:
686 dma->ops->enable_transfer(chip, 0);
694 snd_atiixp_check_bus_busy(chip);
695 if (cmd == SNDRV_PCM_TRIGGER_STOP) {
696 dma->ops->flush_dma(chip);
697 snd_atiixp_check_bus_busy(chip);
700 spin_unlock(&chip->reg_lock);
706 * lowlevel callbacks for each DMA type
708 * every callback is supposed to be called in chip->reg_lock spinlock
711 /* flush FIFO of analog OUT DMA */
712 static void atiixp_out_flush_dma(struct atiixp_modem *chip)
714 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
717 /* enable/disable analog OUT DMA */
718 static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
721 data = atiixp_read(chip, CMD);
723 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
725 atiixp_out_flush_dma(chip);
726 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
728 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
729 atiixp_write(chip, CMD, data);
732 /* start/stop transfer over OUT DMA */
733 static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
735 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
736 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
739 /* enable/disable analog IN DMA */
740 static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
742 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
743 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
746 /* start/stop analog IN DMA */
747 static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
750 unsigned int data = atiixp_read(chip, CMD);
751 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
752 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
753 atiixp_write(chip, CMD, data);
756 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
759 /* flush FIFO of analog IN DMA */
760 static void atiixp_in_flush_dma(struct atiixp_modem *chip)
762 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
765 /* set up slots and formats for analog OUT */
766 static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
768 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
771 spin_lock_irq(&chip->reg_lock);
772 /* set output threshold */
773 data = atiixp_read(chip, MODEM_OUT_FIFO);
774 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
775 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
776 atiixp_write(chip, MODEM_OUT_FIFO, data);
777 spin_unlock_irq(&chip->reg_lock);
781 /* set up slots and formats for analog IN */
782 static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
788 * hw_params - allocate the buffer and set up buffer descriptors
790 static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
791 struct snd_pcm_hw_params *hw_params)
793 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
794 struct atiixp_dma *dma = substream->runtime->private_data;
798 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
801 dma->buf_addr = substream->runtime->dma_addr;
802 dma->buf_bytes = params_buffer_bytes(hw_params);
804 err = atiixp_build_dma_packets(chip, dma, substream,
805 params_periods(hw_params),
806 params_period_bytes(hw_params));
810 /* set up modem rate */
811 for (i = 0; i < NUM_ATI_CODECS; i++) {
814 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
815 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
821 static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
823 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
824 struct atiixp_dma *dma = substream->runtime->private_data;
826 atiixp_clear_dma_packets(chip, dma, substream);
827 snd_pcm_lib_free_pages(substream);
833 * pcm hardware definition, identical for all DMA types
835 static struct snd_pcm_hardware snd_atiixp_pcm_hw =
837 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
838 SNDRV_PCM_INFO_BLOCK_TRANSFER |
839 SNDRV_PCM_INFO_MMAP_VALID),
840 .formats = SNDRV_PCM_FMTBIT_S16_LE,
841 .rates = (SNDRV_PCM_RATE_8000 |
842 SNDRV_PCM_RATE_16000 |
843 SNDRV_PCM_RATE_KNOT),
848 .buffer_bytes_max = 256 * 1024,
849 .period_bytes_min = 32,
850 .period_bytes_max = 128 * 1024,
852 .periods_max = ATI_MAX_DESCRIPTORS,
855 static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
856 struct atiixp_dma *dma, int pcm_type)
858 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
859 struct snd_pcm_runtime *runtime = substream->runtime;
861 static unsigned int rates[] = { 8000, 9600, 12000, 16000 };
862 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
863 .count = ARRAY_SIZE(rates),
868 snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
872 dma->substream = substream;
873 runtime->hw = snd_atiixp_pcm_hw;
874 dma->ac97_pcm_type = pcm_type;
875 if ((err = snd_pcm_hw_constraint_list(runtime, 0,
876 SNDRV_PCM_HW_PARAM_RATE,
877 &hw_constraints_rates)) < 0)
879 if ((err = snd_pcm_hw_constraint_integer(runtime,
880 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
882 runtime->private_data = dma;
884 /* enable DMA bits */
885 spin_lock_irq(&chip->reg_lock);
886 dma->ops->enable_dma(chip, 1);
887 spin_unlock_irq(&chip->reg_lock);
893 static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
894 struct atiixp_dma *dma)
896 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
897 /* disable DMA bits */
898 snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
899 spin_lock_irq(&chip->reg_lock);
900 dma->ops->enable_dma(chip, 0);
901 spin_unlock_irq(&chip->reg_lock);
902 dma->substream = NULL;
909 static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
911 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
914 mutex_lock(&chip->open_mutex);
915 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
916 mutex_unlock(&chip->open_mutex);
922 static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
924 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
926 mutex_lock(&chip->open_mutex);
927 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
928 mutex_unlock(&chip->open_mutex);
932 static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
934 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
935 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
938 static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
940 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
941 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
946 static struct snd_pcm_ops snd_atiixp_playback_ops = {
947 .open = snd_atiixp_playback_open,
948 .close = snd_atiixp_playback_close,
949 .ioctl = snd_pcm_lib_ioctl,
950 .hw_params = snd_atiixp_pcm_hw_params,
951 .hw_free = snd_atiixp_pcm_hw_free,
952 .prepare = snd_atiixp_playback_prepare,
953 .trigger = snd_atiixp_pcm_trigger,
954 .pointer = snd_atiixp_pcm_pointer,
958 static struct snd_pcm_ops snd_atiixp_capture_ops = {
959 .open = snd_atiixp_capture_open,
960 .close = snd_atiixp_capture_close,
961 .ioctl = snd_pcm_lib_ioctl,
962 .hw_params = snd_atiixp_pcm_hw_params,
963 .hw_free = snd_atiixp_pcm_hw_free,
964 .prepare = snd_atiixp_capture_prepare,
965 .trigger = snd_atiixp_pcm_trigger,
966 .pointer = snd_atiixp_pcm_pointer,
969 static struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
970 .type = ATI_DMA_PLAYBACK,
971 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
972 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
973 .enable_dma = atiixp_out_enable_dma,
974 .enable_transfer = atiixp_out_enable_transfer,
975 .flush_dma = atiixp_out_flush_dma,
978 static struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
979 .type = ATI_DMA_CAPTURE,
980 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
981 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
982 .enable_dma = atiixp_in_enable_dma,
983 .enable_transfer = atiixp_in_enable_transfer,
984 .flush_dma = atiixp_in_flush_dma,
987 static int __devinit snd_atiixp_pcm_new(struct atiixp_modem *chip)
992 /* initialize constants */
993 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
994 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
996 /* PCM #0: analog I/O */
997 err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
1000 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
1001 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
1002 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
1003 pcm->private_data = chip;
1004 strcpy(pcm->name, "ATI IXP MC97");
1005 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
1007 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1008 snd_dma_pci_data(chip->pci),
1019 static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1021 struct atiixp_modem *chip = dev_id;
1022 unsigned int status;
1024 status = atiixp_read(chip, ISR);
1029 /* process audio DMA */
1030 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1031 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1032 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1033 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1034 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1035 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1036 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1037 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1039 /* for codec detection */
1040 if (status & CODEC_CHECK_BITS) {
1041 unsigned int detected;
1042 detected = status & CODEC_CHECK_BITS;
1043 spin_lock(&chip->reg_lock);
1044 chip->codec_not_ready_bits |= detected;
1045 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1046 spin_unlock(&chip->reg_lock);
1050 atiixp_write(chip, ISR, status);
1057 * ac97 mixer section
1060 static int __devinit snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1062 struct snd_ac97_bus *pbus;
1063 struct snd_ac97_template ac97;
1066 static struct snd_ac97_bus_ops ops = {
1067 .write = snd_atiixp_ac97_write,
1068 .read = snd_atiixp_ac97_read,
1070 static unsigned int codec_skip[NUM_ATI_CODECS] = {
1071 ATI_REG_ISR_CODEC0_NOT_READY,
1072 ATI_REG_ISR_CODEC1_NOT_READY,
1073 ATI_REG_ISR_CODEC2_NOT_READY,
1076 if (snd_atiixp_codec_detect(chip) < 0)
1079 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
1081 pbus->clock = clock;
1082 chip->ac97_bus = pbus;
1085 for (i = 0; i < NUM_ATI_CODECS; i++) {
1086 if (chip->codec_not_ready_bits & codec_skip[i])
1088 memset(&ac97, 0, sizeof(ac97));
1089 ac97.private_data = chip;
1090 ac97.pci = chip->pci;
1092 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1093 if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1094 chip->ac97[i] = NULL; /* to be sure */
1095 snd_printdd("atiixp-modem: codec %d not available for modem\n", i);
1101 if (! codec_count) {
1102 snd_printk(KERN_ERR "atiixp-modem: no codec available\n");
1106 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1116 static int snd_atiixp_suspend(struct pci_dev *pci, pm_message_t state)
1118 struct snd_card *card = pci_get_drvdata(pci);
1119 struct atiixp_modem *chip = card->private_data;
1122 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1123 for (i = 0; i < NUM_ATI_PCMDEVS; i++)
1124 snd_pcm_suspend_all(chip->pcmdevs[i]);
1125 for (i = 0; i < NUM_ATI_CODECS; i++)
1126 snd_ac97_suspend(chip->ac97[i]);
1127 snd_atiixp_aclink_down(chip);
1128 snd_atiixp_chip_stop(chip);
1130 pci_disable_device(pci);
1131 pci_save_state(pci);
1132 pci_set_power_state(pci, pci_choose_state(pci, state));
1136 static int snd_atiixp_resume(struct pci_dev *pci)
1138 struct snd_card *card = pci_get_drvdata(pci);
1139 struct atiixp_modem *chip = card->private_data;
1142 pci_set_power_state(pci, PCI_D0);
1143 pci_restore_state(pci);
1144 if (pci_enable_device(pci) < 0) {
1145 printk(KERN_ERR "atiixp-modem: pci_enable_device failed, "
1146 "disabling device\n");
1147 snd_card_disconnect(card);
1150 pci_set_master(pci);
1152 snd_atiixp_aclink_reset(chip);
1153 snd_atiixp_chip_start(chip);
1155 for (i = 0; i < NUM_ATI_CODECS; i++)
1156 snd_ac97_resume(chip->ac97[i]);
1158 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1161 #endif /* CONFIG_PM */
1164 #ifdef CONFIG_PROC_FS
1166 * proc interface for register dump
1169 static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1170 struct snd_info_buffer *buffer)
1172 struct atiixp_modem *chip = entry->private_data;
1175 for (i = 0; i < 256; i += 4)
1176 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1179 static void __devinit snd_atiixp_proc_init(struct atiixp_modem *chip)
1181 struct snd_info_entry *entry;
1183 if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
1184 snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
1187 #define snd_atiixp_proc_init(chip)
1195 static int snd_atiixp_free(struct atiixp_modem *chip)
1199 snd_atiixp_chip_stop(chip);
1203 free_irq(chip->irq, chip);
1204 if (chip->remap_addr)
1205 iounmap(chip->remap_addr);
1206 pci_release_regions(chip->pci);
1207 pci_disable_device(chip->pci);
1212 static int snd_atiixp_dev_free(struct snd_device *device)
1214 struct atiixp_modem *chip = device->device_data;
1215 return snd_atiixp_free(chip);
1219 * constructor for chip instance
1221 static int __devinit snd_atiixp_create(struct snd_card *card,
1222 struct pci_dev *pci,
1223 struct atiixp_modem **r_chip)
1225 static struct snd_device_ops ops = {
1226 .dev_free = snd_atiixp_dev_free,
1228 struct atiixp_modem *chip;
1231 if ((err = pci_enable_device(pci)) < 0)
1234 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1236 pci_disable_device(pci);
1240 spin_lock_init(&chip->reg_lock);
1241 mutex_init(&chip->open_mutex);
1245 if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1247 pci_disable_device(pci);
1250 chip->addr = pci_resource_start(pci, 0);
1251 chip->remap_addr = ioremap_nocache(chip->addr, pci_resource_len(pci, 0));
1252 if (chip->remap_addr == NULL) {
1253 snd_printk(KERN_ERR "AC'97 space ioremap problem\n");
1254 snd_atiixp_free(chip);
1258 if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1259 card->shortname, chip)) {
1260 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1261 snd_atiixp_free(chip);
1264 chip->irq = pci->irq;
1265 pci_set_master(pci);
1266 synchronize_irq(chip->irq);
1268 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1269 snd_atiixp_free(chip);
1273 snd_card_set_dev(card, &pci->dev);
1280 static int __devinit snd_atiixp_probe(struct pci_dev *pci,
1281 const struct pci_device_id *pci_id)
1283 struct snd_card *card;
1284 struct atiixp_modem *chip;
1287 card = snd_card_new(index, id, THIS_MODULE, 0);
1291 strcpy(card->driver, "ATIIXP-MODEM");
1292 strcpy(card->shortname, "ATI IXP Modem");
1293 if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1295 card->private_data = chip;
1297 if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1300 if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1303 if ((err = snd_atiixp_pcm_new(chip)) < 0)
1306 snd_atiixp_proc_init(chip);
1308 snd_atiixp_chip_start(chip);
1310 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1311 card->shortname, pci->revision, chip->addr, chip->irq);
1313 if ((err = snd_card_register(card)) < 0)
1316 pci_set_drvdata(pci, card);
1320 snd_card_free(card);
1324 static void __devexit snd_atiixp_remove(struct pci_dev *pci)
1326 snd_card_free(pci_get_drvdata(pci));
1327 pci_set_drvdata(pci, NULL);
1330 static struct pci_driver driver = {
1331 .name = "ATI IXP MC97 controller",
1332 .id_table = snd_atiixp_ids,
1333 .probe = snd_atiixp_probe,
1334 .remove = __devexit_p(snd_atiixp_remove),
1336 .suspend = snd_atiixp_suspend,
1337 .resume = snd_atiixp_resume,
1342 static int __init alsa_card_atiixp_init(void)
1344 return pci_register_driver(&driver);
1347 static void __exit alsa_card_atiixp_exit(void)
1349 pci_unregister_driver(&driver);
1352 module_init(alsa_card_atiixp_init)
1353 module_exit(alsa_card_atiixp_exit)