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
22 #include <sound/driver.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/init.h>
27 #include <linux/pci.h>
28 #include <linux/slab.h>
29 #include <linux/moduleparam.h>
30 #include <linux/mutex.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/info.h>
35 #include <sound/ac97_codec.h>
36 #include <sound/initval.h>
38 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
39 MODULE_DESCRIPTION("ATI IXP MC97 controller");
40 MODULE_LICENSE("GPL");
41 MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
43 static int index = -2; /* Exclude the first card */
44 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
45 static int ac97_clock = 48000;
47 module_param(index, int, 0444);
48 MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
49 module_param(id, charp, 0444);
50 MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
51 module_param(ac97_clock, int, 0444);
52 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
54 /* just for backward compatibility */
56 module_param(enable, bool, 0444);
62 #define ATI_REG_ISR 0x00 /* interrupt source */
63 #define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0)
64 #define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1)
65 #define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2)
66 #define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3)
67 #define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4)
68 #define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5)
69 #define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6)
70 #define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7)
71 #define ATI_REG_ISR_PHYS_INTR (1U<<8)
72 #define ATI_REG_ISR_PHYS_MISMATCH (1U<<9)
73 #define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10)
74 #define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11)
75 #define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12)
76 #define ATI_REG_ISR_NEW_FRAME (1U<<13)
77 #define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14)
79 #define ATI_REG_IER 0x04 /* interrupt enable */
80 #define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0)
81 #define ATI_REG_IER_MODEM_STATUS_EN (1U<<1)
82 #define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)
83 #define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)
84 #define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)
85 #define ATI_REG_IER_PHYS_INTR_EN (1U<<8)
86 #define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9)
87 #define ATI_REG_IER_CODEC0_INTR_EN (1U<<10)
88 #define ATI_REG_IER_CODEC1_INTR_EN (1U<<11)
89 #define ATI_REG_IER_CODEC2_INTR_EN (1U<<12)
90 #define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */
91 #define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */
92 #define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)
94 #define ATI_REG_CMD 0x08 /* command */
95 #define ATI_REG_CMD_POWERDOWN (1U<<0)
96 #define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */
97 #define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */
98 #define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */
99 #define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */
100 #define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */
101 #define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */
102 #define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */
103 #define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */
104 #define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */
105 #define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
106 #define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */
107 #define ATI_REG_CMD_LOOPBACK_EN (1U<<23)
108 #define ATI_REG_CMD_PACKED_DIS (1U<<24)
109 #define ATI_REG_CMD_BURST_EN (1U<<25)
110 #define ATI_REG_CMD_PANIC_EN (1U<<26)
111 #define ATI_REG_CMD_MODEM_PRESENT (1U<<27)
112 #define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28)
113 #define ATI_REG_CMD_AC_SOFT_RESET (1U<<29)
114 #define ATI_REG_CMD_AC_SYNC (1U<<30)
115 #define ATI_REG_CMD_AC_RESET (1U<<31)
117 #define ATI_REG_PHYS_OUT_ADDR 0x0c
118 #define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0)
119 #define ATI_REG_PHYS_OUT_RW (1U<<2)
120 #define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8)
121 #define ATI_REG_PHYS_OUT_ADDR_SHIFT 9
122 #define ATI_REG_PHYS_OUT_DATA_SHIFT 16
124 #define ATI_REG_PHYS_IN_ADDR 0x10
125 #define ATI_REG_PHYS_IN_READ_FLAG (1U<<8)
126 #define ATI_REG_PHYS_IN_ADDR_SHIFT 9
127 #define ATI_REG_PHYS_IN_DATA_SHIFT 16
129 #define ATI_REG_SLOTREQ 0x14
131 #define ATI_REG_COUNTER 0x18
132 #define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */
133 #define ATI_REG_COUNTER_BITCLOCK (31U<<8)
135 #define ATI_REG_IN_FIFO_THRESHOLD 0x1c
137 #define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20
138 #define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */
139 #define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */
140 #define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */
141 #define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30
142 #define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */
143 #define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16)
144 #define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16
145 #define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38
146 #define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c
147 #define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40
148 #define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44
149 #define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48
150 #define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c
151 #define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50
152 #define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54
153 #define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58
154 #define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c
155 #define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60
156 #define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64
157 #define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68
158 #define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c
159 #define ATI_REG_MODEM_OUT_FIFO_USED 0x70
160 #define ATI_REG_MODEM_OUT_GPIO 0x74
161 #define ATI_REG_MODEM_OUT_GPIO_EN 1
162 #define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
163 #define ATI_REG_MODEM_IN_GPIO 0x78
165 #define ATI_REG_MODEM_MIRROR 0x7c
166 #define ATI_REG_AUDIO_MIRROR 0x80
168 #define ATI_REG_MODEM_FIFO_FLUSH 0x88
169 #define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0)
170 #define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1)
171 #define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2)
172 #define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3)
175 #define ATI_REG_LINKPTR_EN (1U<<0)
177 #define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
183 * DMA packate descriptor
186 struct atiixp_dma_desc {
187 u32 addr; /* DMA buffer address */
188 u16 status; /* status bits */
189 u16 size; /* size of the packet in dwords */
190 u32 next; /* address of the next packet descriptor */
196 enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
197 enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
198 enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
200 #define NUM_ATI_CODECS 3
204 * constants and callbacks for each DMA type
206 struct atiixp_dma_ops {
207 int type; /* ATI_DMA_XXX */
208 unsigned int llp_offset; /* LINKPTR offset */
209 unsigned int dt_cur; /* DT_CUR offset */
210 /* called from open callback */
211 void (*enable_dma)(struct atiixp_modem *chip, int on);
212 /* called from trigger (START/STOP) */
213 void (*enable_transfer)(struct atiixp_modem *chip, int on);
214 /* called from trigger (STOP only) */
215 void (*flush_dma)(struct atiixp_modem *chip);
222 const struct atiixp_dma_ops *ops;
223 struct snd_dma_buffer desc_buf;
224 struct snd_pcm_substream *substream; /* assigned PCM substream */
225 unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */
226 unsigned int period_bytes, periods;
230 int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
236 struct atiixp_modem {
237 struct snd_card *card;
240 struct resource *res; /* memory i/o */
242 void __iomem *remap_addr;
245 struct snd_ac97_bus *ac97_bus;
246 struct snd_ac97 *ac97[NUM_ATI_CODECS];
250 struct atiixp_dma dmas[NUM_ATI_DMAS];
251 struct ac97_pcm *pcms[NUM_ATI_PCMS];
252 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
254 int max_channels; /* max. channels for PCM out */
256 unsigned int codec_not_ready_bits; /* for codec detection */
258 int spdif_over_aclink; /* passed from the module option */
259 struct mutex open_mutex; /* playback open mutex */
265 static struct pci_device_id snd_atiixp_ids[] = {
266 { 0x1002, 0x434d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB200 */
267 { 0x1002, 0x4378, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB400 */
271 MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
279 * update the bits of the given register.
280 * return 1 if the bits changed.
282 static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
283 unsigned int mask, unsigned int value)
285 void __iomem *addr = chip->remap_addr + reg;
286 unsigned int data, old_data;
287 old_data = data = readl(addr);
290 if (old_data == data)
297 * macros for easy use
299 #define atiixp_write(chip,reg,value) \
300 writel(value, chip->remap_addr + ATI_REG_##reg)
301 #define atiixp_read(chip,reg) \
302 readl(chip->remap_addr + ATI_REG_##reg)
303 #define atiixp_update(chip,reg,mask,val) \
304 snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
307 * handling DMA packets
309 * we allocate a linear buffer for the DMA, and split it to each packet.
310 * in a future version, a scatter-gather buffer should be implemented.
313 #define ATI_DESC_LIST_SIZE \
314 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
317 * build packets ring for the given buffer size.
319 * IXP handles the buffer descriptors, which are connected as a linked
320 * list. although we can change the list dynamically, in this version,
321 * a static RING of buffer descriptors is used.
323 * the ring is built in this function, and is set up to the hardware.
325 static int atiixp_build_dma_packets(struct atiixp_modem *chip,
326 struct atiixp_dma *dma,
327 struct snd_pcm_substream *substream,
328 unsigned int periods,
329 unsigned int period_bytes)
335 if (periods > ATI_MAX_DESCRIPTORS)
338 if (dma->desc_buf.area == NULL) {
339 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
340 ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)
342 dma->period_bytes = dma->periods = 0; /* clear */
345 if (dma->periods == periods && dma->period_bytes == period_bytes)
348 /* reset DMA before changing the descriptor table */
349 spin_lock_irqsave(&chip->reg_lock, flags);
350 writel(0, chip->remap_addr + dma->ops->llp_offset);
351 dma->ops->enable_dma(chip, 0);
352 dma->ops->enable_dma(chip, 1);
353 spin_unlock_irqrestore(&chip->reg_lock, flags);
355 /* fill the entries */
356 addr = (u32)substream->runtime->dma_addr;
357 desc_addr = (u32)dma->desc_buf.addr;
358 for (i = 0; i < periods; i++) {
359 struct atiixp_dma_desc *desc;
360 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
361 desc->addr = cpu_to_le32(addr);
363 desc->size = period_bytes >> 2; /* in dwords */
364 desc_addr += sizeof(struct atiixp_dma_desc);
365 if (i == periods - 1)
366 desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
368 desc->next = cpu_to_le32(desc_addr);
369 addr += period_bytes;
372 writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
373 chip->remap_addr + dma->ops->llp_offset);
375 dma->period_bytes = period_bytes;
376 dma->periods = periods;
382 * remove the ring buffer and release it if assigned
384 static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
385 struct atiixp_dma *dma,
386 struct snd_pcm_substream *substream)
388 if (dma->desc_buf.area) {
389 writel(0, chip->remap_addr + dma->ops->llp_offset);
390 snd_dma_free_pages(&dma->desc_buf);
391 dma->desc_buf.area = NULL;
398 static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
402 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
404 snd_printk(KERN_WARNING "atiixp-modem: codec acquire timeout\n");
412 static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
413 unsigned short codec,
419 if (snd_atiixp_acquire_codec(chip) < 0)
421 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
422 ATI_REG_PHYS_OUT_ADDR_EN |
423 ATI_REG_PHYS_OUT_RW |
425 atiixp_write(chip, PHYS_OUT_ADDR, data);
426 if (snd_atiixp_acquire_codec(chip) < 0)
430 data = atiixp_read(chip, PHYS_IN_ADDR);
431 if (data & ATI_REG_PHYS_IN_READ_FLAG)
432 return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
435 /* time out may happen during reset */
437 snd_printk(KERN_WARNING "atiixp-modem: codec read timeout (reg %x)\n", reg);
442 static void snd_atiixp_codec_write(struct atiixp_modem *chip,
443 unsigned short codec,
444 unsigned short reg, unsigned short val)
448 if (snd_atiixp_acquire_codec(chip) < 0)
450 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
451 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
452 ATI_REG_PHYS_OUT_ADDR_EN | codec;
453 atiixp_write(chip, PHYS_OUT_ADDR, data);
457 static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
460 struct atiixp_modem *chip = ac97->private_data;
461 return snd_atiixp_codec_read(chip, ac97->num, reg);
465 static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
468 struct atiixp_modem *chip = ac97->private_data;
469 if (reg == AC97_GPIO_STATUS) {
470 atiixp_write(chip, MODEM_OUT_GPIO,
471 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
474 snd_atiixp_codec_write(chip, ac97->num, reg, val);
480 static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
484 /* reset powerdoewn */
485 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
488 /* perform a software reset */
489 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
490 atiixp_read(chip, CMD);
492 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
495 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
496 /* do a hard reset */
497 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
498 ATI_REG_CMD_AC_SYNC);
499 atiixp_read(chip, CMD);
501 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
503 snd_printk(KERN_ERR "atiixp-modem: codec reset timeout\n");
508 /* deassert RESET and assert SYNC to make sure */
509 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
510 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
516 static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
518 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
520 atiixp_update(chip, CMD,
521 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
522 ATI_REG_CMD_POWERDOWN);
528 * auto-detection of codecs
530 * the IXP chip can generate interrupts for the non-existing codecs.
531 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
532 * even if all three codecs are connected.
535 #define ALL_CODEC_NOT_READY \
536 (ATI_REG_ISR_CODEC0_NOT_READY |\
537 ATI_REG_ISR_CODEC1_NOT_READY |\
538 ATI_REG_ISR_CODEC2_NOT_READY)
539 #define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
541 static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
545 chip->codec_not_ready_bits = 0;
546 atiixp_write(chip, IER, CODEC_CHECK_BITS);
547 /* wait for the interrupts */
549 while (timeout-- > 0) {
551 if (chip->codec_not_ready_bits)
554 atiixp_write(chip, IER, 0); /* disable irqs */
556 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
557 snd_printk(KERN_ERR "atiixp-modem: no codec detected!\n");
565 * enable DMA and irqs
567 static int snd_atiixp_chip_start(struct atiixp_modem *chip)
571 /* set up spdif, enable burst mode */
572 reg = atiixp_read(chip, CMD);
573 reg |= ATI_REG_CMD_BURST_EN;
574 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
575 reg |= ATI_REG_CMD_MODEM_PRESENT;
576 atiixp_write(chip, CMD, reg);
578 /* clear all interrupt source */
579 atiixp_write(chip, ISR, 0xffffffff);
581 atiixp_write(chip, IER,
582 ATI_REG_IER_MODEM_STATUS_EN |
583 ATI_REG_IER_MODEM_IN_XRUN_EN |
584 ATI_REG_IER_MODEM_OUT1_XRUN_EN);
590 * disable DMA and IRQs
592 static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
594 /* clear interrupt source */
595 atiixp_write(chip, ISR, atiixp_read(chip, ISR));
597 atiixp_write(chip, IER, 0);
607 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
608 * position. when SG-buffer is implemented, the offset must be calculated
611 static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
613 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
614 struct snd_pcm_runtime *runtime = substream->runtime;
615 struct atiixp_dma *dma = runtime->private_data;
620 curptr = readl(chip->remap_addr + dma->ops->dt_cur);
621 if (curptr < dma->buf_addr)
623 curptr -= dma->buf_addr;
624 if (curptr >= dma->buf_bytes)
626 return bytes_to_frames(runtime, curptr);
628 snd_printd("atiixp-modem: invalid DMA pointer read 0x%x (buf=%x)\n",
629 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
634 * XRUN detected, and stop the PCM substream
636 static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
637 struct atiixp_dma *dma)
639 if (! dma->substream || ! dma->running)
641 snd_printdd("atiixp-modem: XRUN detected (DMA %d)\n", dma->ops->type);
642 snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
646 * the period ack. update the substream.
648 static void snd_atiixp_update_dma(struct atiixp_modem *chip,
649 struct atiixp_dma *dma)
651 if (! dma->substream || ! dma->running)
653 snd_pcm_period_elapsed(dma->substream);
656 /* set BUS_BUSY interrupt bit if any DMA is running */
657 /* call with spinlock held */
658 static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
660 unsigned int bus_busy;
661 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
662 ATI_REG_CMD_MODEM_RECEIVE_EN))
663 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
666 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
669 /* common trigger callback
670 * calling the lowlevel callbacks in it
672 static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
674 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
675 struct atiixp_dma *dma = substream->runtime->private_data;
678 snd_assert(dma->ops->enable_transfer && dma->ops->flush_dma, return -EINVAL);
680 spin_lock(&chip->reg_lock);
682 case SNDRV_PCM_TRIGGER_START:
683 dma->ops->enable_transfer(chip, 1);
686 case SNDRV_PCM_TRIGGER_STOP:
687 dma->ops->enable_transfer(chip, 0);
695 snd_atiixp_check_bus_busy(chip);
696 if (cmd == SNDRV_PCM_TRIGGER_STOP) {
697 dma->ops->flush_dma(chip);
698 snd_atiixp_check_bus_busy(chip);
701 spin_unlock(&chip->reg_lock);
707 * lowlevel callbacks for each DMA type
709 * every callback is supposed to be called in chip->reg_lock spinlock
712 /* flush FIFO of analog OUT DMA */
713 static void atiixp_out_flush_dma(struct atiixp_modem *chip)
715 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
718 /* enable/disable analog OUT DMA */
719 static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
722 data = atiixp_read(chip, CMD);
724 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
726 atiixp_out_flush_dma(chip);
727 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
729 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
730 atiixp_write(chip, CMD, data);
733 /* start/stop transfer over OUT DMA */
734 static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
736 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
737 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
740 /* enable/disable analog IN DMA */
741 static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
743 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
744 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
747 /* start/stop analog IN DMA */
748 static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
751 unsigned int data = atiixp_read(chip, CMD);
752 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
753 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
754 atiixp_write(chip, CMD, data);
757 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
760 /* flush FIFO of analog IN DMA */
761 static void atiixp_in_flush_dma(struct atiixp_modem *chip)
763 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
766 /* set up slots and formats for analog OUT */
767 static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
769 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
772 spin_lock_irq(&chip->reg_lock);
773 /* set output threshold */
774 data = atiixp_read(chip, MODEM_OUT_FIFO);
775 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
776 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
777 atiixp_write(chip, MODEM_OUT_FIFO, data);
778 spin_unlock_irq(&chip->reg_lock);
782 /* set up slots and formats for analog IN */
783 static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
789 * hw_params - allocate the buffer and set up buffer descriptors
791 static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
792 struct snd_pcm_hw_params *hw_params)
794 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
795 struct atiixp_dma *dma = substream->runtime->private_data;
799 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
802 dma->buf_addr = substream->runtime->dma_addr;
803 dma->buf_bytes = params_buffer_bytes(hw_params);
805 err = atiixp_build_dma_packets(chip, dma, substream,
806 params_periods(hw_params),
807 params_period_bytes(hw_params));
811 /* set up modem rate */
812 for (i = 0; i < NUM_ATI_CODECS; i++) {
815 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
816 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
822 static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
824 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
825 struct atiixp_dma *dma = substream->runtime->private_data;
827 atiixp_clear_dma_packets(chip, dma, substream);
828 snd_pcm_lib_free_pages(substream);
834 * pcm hardware definition, identical for all DMA types
836 static struct snd_pcm_hardware snd_atiixp_pcm_hw =
838 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
839 SNDRV_PCM_INFO_BLOCK_TRANSFER |
840 SNDRV_PCM_INFO_MMAP_VALID),
841 .formats = SNDRV_PCM_FMTBIT_S16_LE,
842 .rates = (SNDRV_PCM_RATE_8000 |
843 SNDRV_PCM_RATE_16000 |
844 SNDRV_PCM_RATE_KNOT),
849 .buffer_bytes_max = 256 * 1024,
850 .period_bytes_min = 32,
851 .period_bytes_max = 128 * 1024,
853 .periods_max = ATI_MAX_DESCRIPTORS,
856 static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
857 struct atiixp_dma *dma, int pcm_type)
859 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
860 struct snd_pcm_runtime *runtime = substream->runtime;
862 static unsigned int rates[] = { 8000, 9600, 12000, 16000 };
863 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
864 .count = ARRAY_SIZE(rates),
869 snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
873 dma->substream = substream;
874 runtime->hw = snd_atiixp_pcm_hw;
875 dma->ac97_pcm_type = pcm_type;
876 if ((err = snd_pcm_hw_constraint_list(runtime, 0,
877 SNDRV_PCM_HW_PARAM_RATE,
878 &hw_constraints_rates)) < 0)
880 if ((err = snd_pcm_hw_constraint_integer(runtime,
881 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
883 runtime->private_data = dma;
885 /* enable DMA bits */
886 spin_lock_irq(&chip->reg_lock);
887 dma->ops->enable_dma(chip, 1);
888 spin_unlock_irq(&chip->reg_lock);
894 static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
895 struct atiixp_dma *dma)
897 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
898 /* disable DMA bits */
899 snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
900 spin_lock_irq(&chip->reg_lock);
901 dma->ops->enable_dma(chip, 0);
902 spin_unlock_irq(&chip->reg_lock);
903 dma->substream = NULL;
910 static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
912 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
915 mutex_lock(&chip->open_mutex);
916 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
917 mutex_unlock(&chip->open_mutex);
923 static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
925 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
927 mutex_lock(&chip->open_mutex);
928 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
929 mutex_unlock(&chip->open_mutex);
933 static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
935 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
936 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
939 static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
941 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
942 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
947 static struct snd_pcm_ops snd_atiixp_playback_ops = {
948 .open = snd_atiixp_playback_open,
949 .close = snd_atiixp_playback_close,
950 .ioctl = snd_pcm_lib_ioctl,
951 .hw_params = snd_atiixp_pcm_hw_params,
952 .hw_free = snd_atiixp_pcm_hw_free,
953 .prepare = snd_atiixp_playback_prepare,
954 .trigger = snd_atiixp_pcm_trigger,
955 .pointer = snd_atiixp_pcm_pointer,
959 static struct snd_pcm_ops snd_atiixp_capture_ops = {
960 .open = snd_atiixp_capture_open,
961 .close = snd_atiixp_capture_close,
962 .ioctl = snd_pcm_lib_ioctl,
963 .hw_params = snd_atiixp_pcm_hw_params,
964 .hw_free = snd_atiixp_pcm_hw_free,
965 .prepare = snd_atiixp_capture_prepare,
966 .trigger = snd_atiixp_pcm_trigger,
967 .pointer = snd_atiixp_pcm_pointer,
970 static struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
971 .type = ATI_DMA_PLAYBACK,
972 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
973 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
974 .enable_dma = atiixp_out_enable_dma,
975 .enable_transfer = atiixp_out_enable_transfer,
976 .flush_dma = atiixp_out_flush_dma,
979 static struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
980 .type = ATI_DMA_CAPTURE,
981 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
982 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
983 .enable_dma = atiixp_in_enable_dma,
984 .enable_transfer = atiixp_in_enable_transfer,
985 .flush_dma = atiixp_in_flush_dma,
988 static int __devinit snd_atiixp_pcm_new(struct atiixp_modem *chip)
993 /* initialize constants */
994 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
995 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
997 /* PCM #0: analog I/O */
998 err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
1001 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
1002 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
1003 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
1004 pcm->private_data = chip;
1005 strcpy(pcm->name, "ATI IXP MC97");
1006 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
1008 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1009 snd_dma_pci_data(chip->pci),
1020 static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1022 struct atiixp_modem *chip = dev_id;
1023 unsigned int status;
1025 status = atiixp_read(chip, ISR);
1030 /* process audio DMA */
1031 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1032 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1033 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1034 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1035 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1036 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1037 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1038 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1040 /* for codec detection */
1041 if (status & CODEC_CHECK_BITS) {
1042 unsigned int detected;
1043 detected = status & CODEC_CHECK_BITS;
1044 spin_lock(&chip->reg_lock);
1045 chip->codec_not_ready_bits |= detected;
1046 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1047 spin_unlock(&chip->reg_lock);
1051 atiixp_write(chip, ISR, status);
1058 * ac97 mixer section
1061 static int __devinit snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1063 struct snd_ac97_bus *pbus;
1064 struct snd_ac97_template ac97;
1067 static struct snd_ac97_bus_ops ops = {
1068 .write = snd_atiixp_ac97_write,
1069 .read = snd_atiixp_ac97_read,
1071 static unsigned int codec_skip[NUM_ATI_CODECS] = {
1072 ATI_REG_ISR_CODEC0_NOT_READY,
1073 ATI_REG_ISR_CODEC1_NOT_READY,
1074 ATI_REG_ISR_CODEC2_NOT_READY,
1077 if (snd_atiixp_codec_detect(chip) < 0)
1080 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
1082 pbus->clock = clock;
1083 chip->ac97_bus = pbus;
1086 for (i = 0; i < NUM_ATI_CODECS; i++) {
1087 if (chip->codec_not_ready_bits & codec_skip[i])
1089 memset(&ac97, 0, sizeof(ac97));
1090 ac97.private_data = chip;
1091 ac97.pci = chip->pci;
1093 ac97.scaps = AC97_SCAP_SKIP_AUDIO;
1094 if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1095 chip->ac97[i] = NULL; /* to be sure */
1096 snd_printdd("atiixp-modem: codec %d not available for modem\n", i);
1102 if (! codec_count) {
1103 snd_printk(KERN_ERR "atiixp-modem: no codec available\n");
1107 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1117 static int snd_atiixp_suspend(struct pci_dev *pci, pm_message_t state)
1119 struct snd_card *card = pci_get_drvdata(pci);
1120 struct atiixp_modem *chip = card->private_data;
1123 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1124 for (i = 0; i < NUM_ATI_PCMDEVS; i++)
1125 snd_pcm_suspend_all(chip->pcmdevs[i]);
1126 for (i = 0; i < NUM_ATI_CODECS; i++)
1127 snd_ac97_suspend(chip->ac97[i]);
1128 snd_atiixp_aclink_down(chip);
1129 snd_atiixp_chip_stop(chip);
1131 pci_set_power_state(pci, PCI_D3hot);
1132 pci_disable_device(pci);
1133 pci_save_state(pci);
1137 static int snd_atiixp_resume(struct pci_dev *pci)
1139 struct snd_card *card = pci_get_drvdata(pci);
1140 struct atiixp_modem *chip = card->private_data;
1143 pci_restore_state(pci);
1144 pci_enable_device(pci);
1145 pci_set_power_state(pci, PCI_D0);
1146 pci_set_master(pci);
1148 snd_atiixp_aclink_reset(chip);
1149 snd_atiixp_chip_start(chip);
1151 for (i = 0; i < NUM_ATI_CODECS; i++)
1152 snd_ac97_resume(chip->ac97[i]);
1154 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1157 #endif /* CONFIG_PM */
1160 #ifdef CONFIG_PROC_FS
1162 * proc interface for register dump
1165 static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1166 struct snd_info_buffer *buffer)
1168 struct atiixp_modem *chip = entry->private_data;
1171 for (i = 0; i < 256; i += 4)
1172 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1175 static void __devinit snd_atiixp_proc_init(struct atiixp_modem *chip)
1177 struct snd_info_entry *entry;
1179 if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
1180 snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
1183 #define snd_atiixp_proc_init(chip)
1191 static int snd_atiixp_free(struct atiixp_modem *chip)
1195 snd_atiixp_chip_stop(chip);
1196 synchronize_irq(chip->irq);
1199 free_irq(chip->irq, chip);
1200 if (chip->remap_addr)
1201 iounmap(chip->remap_addr);
1202 pci_release_regions(chip->pci);
1203 pci_disable_device(chip->pci);
1208 static int snd_atiixp_dev_free(struct snd_device *device)
1210 struct atiixp_modem *chip = device->device_data;
1211 return snd_atiixp_free(chip);
1215 * constructor for chip instance
1217 static int __devinit snd_atiixp_create(struct snd_card *card,
1218 struct pci_dev *pci,
1219 struct atiixp_modem **r_chip)
1221 static struct snd_device_ops ops = {
1222 .dev_free = snd_atiixp_dev_free,
1224 struct atiixp_modem *chip;
1227 if ((err = pci_enable_device(pci)) < 0)
1230 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1232 pci_disable_device(pci);
1236 spin_lock_init(&chip->reg_lock);
1237 mutex_init(&chip->open_mutex);
1241 if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1243 pci_disable_device(pci);
1246 chip->addr = pci_resource_start(pci, 0);
1247 chip->remap_addr = ioremap_nocache(chip->addr, pci_resource_len(pci, 0));
1248 if (chip->remap_addr == NULL) {
1249 snd_printk(KERN_ERR "AC'97 space ioremap problem\n");
1250 snd_atiixp_free(chip);
1254 if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_DISABLED|IRQF_SHARED,
1255 card->shortname, chip)) {
1256 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1257 snd_atiixp_free(chip);
1260 chip->irq = pci->irq;
1261 pci_set_master(pci);
1262 synchronize_irq(chip->irq);
1264 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1265 snd_atiixp_free(chip);
1269 snd_card_set_dev(card, &pci->dev);
1276 static int __devinit snd_atiixp_probe(struct pci_dev *pci,
1277 const struct pci_device_id *pci_id)
1279 struct snd_card *card;
1280 struct atiixp_modem *chip;
1281 unsigned char revision;
1284 card = snd_card_new(index, id, THIS_MODULE, 0);
1288 pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1290 strcpy(card->driver, "ATIIXP-MODEM");
1291 strcpy(card->shortname, "ATI IXP Modem");
1292 if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1294 card->private_data = chip;
1296 if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1299 if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1302 if ((err = snd_atiixp_pcm_new(chip)) < 0)
1305 snd_atiixp_proc_init(chip);
1307 snd_atiixp_chip_start(chip);
1309 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1310 card->shortname, revision, chip->addr, chip->irq);
1312 if ((err = snd_card_register(card)) < 0)
1315 pci_set_drvdata(pci, card);
1319 snd_card_free(card);
1323 static void __devexit snd_atiixp_remove(struct pci_dev *pci)
1325 snd_card_free(pci_get_drvdata(pci));
1326 pci_set_drvdata(pci, NULL);
1329 static struct pci_driver driver = {
1330 .name = "ATI IXP MC97 controller",
1331 .id_table = snd_atiixp_ids,
1332 .probe = snd_atiixp_probe,
1333 .remove = __devexit_p(snd_atiixp_remove),
1335 .suspend = snd_atiixp_suspend,
1336 .resume = snd_atiixp_resume,
1341 static int __init alsa_card_atiixp_init(void)
1343 return pci_register_driver(&driver);
1346 static void __exit alsa_card_atiixp_exit(void)
1348 pci_unregister_driver(&driver);
1351 module_init(alsa_card_atiixp_init)
1352 module_exit(alsa_card_atiixp_exit)