Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/sound/pci/atiixp_modem.c

  1 /*
  2  *   ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
  3  *
  4  *      Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
  5  *
  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.
 10  *
 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.
 15  *
 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
 19  *
 20  */
 21 
 22 #include <asm/io.h>
 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/module.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>
 36 
 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}}");
 41 
 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;
 45 
 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).");
 52 
 53 /* just for backward compatibility */
 54 static bool enable;
 55 module_param(enable, bool, 0444);
 56 
 57 
 58 /*
 59  */
 60 
 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)
 77 
 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)
 92 
 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)
115 
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
122 
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
127 
128 #define ATI_REG_SLOTREQ                 0x14
129 
130 #define ATI_REG_COUNTER                 0x18
131 #define  ATI_REG_COUNTER_SLOT           (3U<<0) /* slot # */
132 #define  ATI_REG_COUNTER_BITCLOCK       (31U<<8)
133 
134 #define ATI_REG_IN_FIFO_THRESHOLD       0x1c
135 
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
163 
164 #define ATI_REG_MODEM_MIRROR            0x7c
165 #define ATI_REG_AUDIO_MIRROR            0x80
166 
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)
172 
173 /* LINKPTR */
174 #define  ATI_REG_LINKPTR_EN             (1U<<0)
175 
176 #define ATI_MAX_DESCRIPTORS     256     /* max number of descriptor packets */
177 
178 
179 struct atiixp_modem;
180 
181 /*
182  * DMA packate descriptor
183  */
184 
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 */
190 };
191 
192 /*
193  * stream enum
194  */
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 */
198 
199 #define NUM_ATI_CODECS  3
200 
201 
202 /*
203  * constants and callbacks for each DMA type
204  */
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);
215 };
216 
217 /*
218  * DMA stream
219  */
220 struct atiixp_dma {
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;
226         int opened;
227         int running;
228         int pcm_open_flag;
229         int ac97_pcm_type;      /* index # of ac97_pcm to access, -1 = not used */
230 };
231 
232 /*
233  * ATI IXP chip
234  */
235 struct atiixp_modem {
236         struct snd_card *card;
237         struct pci_dev *pci;
238 
239         struct resource *res;           /* memory i/o */
240         unsigned long addr;
241         void __iomem *remap_addr;
242         int irq;
243         
244         struct snd_ac97_bus *ac97_bus;
245         struct snd_ac97 *ac97[NUM_ATI_CODECS];
246 
247         spinlock_t reg_lock;
248 
249         struct atiixp_dma dmas[NUM_ATI_DMAS];
250         struct ac97_pcm *pcms[NUM_ATI_PCMS];
251         struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
252 
253         int max_channels;               /* max. channels for PCM out */
254 
255         unsigned int codec_not_ready_bits;      /* for codec detection */
256 
257         int spdif_over_aclink;          /* passed from the module option */
258         struct mutex open_mutex;        /* playback open mutex */
259 };
260 
261 
262 /*
263  */
264 static const struct pci_device_id snd_atiixp_ids[] = {
265         { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
266         { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
267         { 0, }
268 };
269 
270 MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
271 
272 
273 /*
274  * lowlevel functions
275  */
276 
277 /*
278  * update the bits of the given register.
279  * return 1 if the bits changed.
280  */
281 static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
282                                   unsigned int mask, unsigned int value)
283 {
284         void __iomem *addr = chip->remap_addr + reg;
285         unsigned int data, old_data;
286         old_data = data = readl(addr);
287         data &= ~mask;
288         data |= value;
289         if (old_data == data)
290                 return 0;
291         writel(data, addr);
292         return 1;
293 }
294 
295 /*
296  * macros for easy use
297  */
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)
304 
305 /*
306  * handling DMA packets
307  *
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.
310  */
311 
312 #define ATI_DESC_LIST_SIZE \
313         PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
314 
315 /*
316  * build packets ring for the given buffer size.
317  *
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.
321  *
322  * the ring is built in this function, and is set up to the hardware. 
323  */
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)
329 {
330         unsigned int i;
331         u32 addr, desc_addr;
332         unsigned long flags;
333 
334         if (periods > ATI_MAX_DESCRIPTORS)
335                 return -ENOMEM;
336 
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)
340                         return -ENOMEM;
341                 dma->period_bytes = dma->periods = 0; /* clear */
342         }
343 
344         if (dma->periods == periods && dma->period_bytes == period_bytes)
345                 return 0;
346 
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);
353 
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);
361                 desc->status = 0;
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);
366                 else
367                         desc->next = cpu_to_le32(desc_addr);
368                 addr += period_bytes;
369         }
370 
371         writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
372                chip->remap_addr + dma->ops->llp_offset);
373 
374         dma->period_bytes = period_bytes;
375         dma->periods = periods;
376 
377         return 0;
378 }
379 
380 /*
381  * remove the ring buffer and release it if assigned
382  */
383 static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
384                                      struct atiixp_dma *dma,
385                                      struct snd_pcm_substream *substream)
386 {
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;
391         }
392 }
393 
394 /*
395  * AC97 interface
396  */
397 static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
398 {
399         int timeout = 1000;
400 
401         while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
402                 if (! timeout--) {
403                         dev_warn(chip->card->dev, "codec acquire timeout\n");
404                         return -EBUSY;
405                 }
406                 udelay(1);
407         }
408         return 0;
409 }
410 
411 static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
412                                             unsigned short codec,
413                                             unsigned short reg)
414 {
415         unsigned int data;
416         int timeout;
417 
418         if (snd_atiixp_acquire_codec(chip) < 0)
419                 return 0xffff;
420         data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
421                 ATI_REG_PHYS_OUT_ADDR_EN |
422                 ATI_REG_PHYS_OUT_RW |
423                 codec;
424         atiixp_write(chip, PHYS_OUT_ADDR, data);
425         if (snd_atiixp_acquire_codec(chip) < 0)
426                 return 0xffff;
427         timeout = 1000;
428         do {
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;
432                 udelay(1);
433         } while (--timeout);
434         /* time out may happen during reset */
435         if (reg < 0x7c)
436                 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
437         return 0xffff;
438 }
439 
440 
441 static void snd_atiixp_codec_write(struct atiixp_modem *chip,
442                                    unsigned short codec,
443                                    unsigned short reg, unsigned short val)
444 {
445         unsigned int data;
446     
447         if (snd_atiixp_acquire_codec(chip) < 0)
448                 return;
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);
453 }
454 
455 
456 static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
457                                            unsigned short reg)
458 {
459         struct atiixp_modem *chip = ac97->private_data;
460         return snd_atiixp_codec_read(chip, ac97->num, reg);
461     
462 }
463 
464 static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
465                                   unsigned short val)
466 {
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);
471                 return;
472         }
473         snd_atiixp_codec_write(chip, ac97->num, reg, val);
474 }
475 
476 /*
477  * reset AC link
478  */
479 static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
480 {
481         int timeout;
482 
483         /* reset powerdoewn */
484         if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
485                 udelay(10);
486 
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);
490         udelay(10);
491         atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
492     
493         timeout = 10;
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);
499                 msleep(1);
500                 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
501                 if (!--timeout) {
502                         dev_err(chip->card->dev, "codec reset timeout\n");
503                         break;
504                 }
505         }
506 
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);
510 
511         return 0;
512 }
513 
514 #ifdef CONFIG_PM_SLEEP
515 static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
516 {
517         // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
518         //      return -EBUSY;
519         atiixp_update(chip, CMD,
520                      ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
521                      ATI_REG_CMD_POWERDOWN);
522         return 0;
523 }
524 #endif
525 
526 /*
527  * auto-detection of codecs
528  *
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.
532  */
533 
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)
539 
540 static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
541 {
542         int timeout;
543 
544         chip->codec_not_ready_bits = 0;
545         atiixp_write(chip, IER, CODEC_CHECK_BITS);
546         /* wait for the interrupts */
547         timeout = 50;
548         while (timeout-- > 0) {
549                 msleep(1);
550                 if (chip->codec_not_ready_bits)
551                         break;
552         }
553         atiixp_write(chip, IER, 0); /* disable irqs */
554 
555         if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
556                 dev_err(chip->card->dev, "no codec detected!\n");
557                 return -ENXIO;
558         }
559         return 0;
560 }
561 
562 
563 /*
564  * enable DMA and irqs
565  */
566 static int snd_atiixp_chip_start(struct atiixp_modem *chip)
567 {
568         unsigned int reg;
569 
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);
576 
577         /* clear all interrupt source */
578         atiixp_write(chip, ISR, 0xffffffff);
579         /* enable irqs */
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);
584         return 0;
585 }
586 
587 
588 /*
589  * disable DMA and IRQs
590  */
591 static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
592 {
593         /* clear interrupt source */
594         atiixp_write(chip, ISR, atiixp_read(chip, ISR));
595         /* disable irqs */
596         atiixp_write(chip, IER, 0);
597         return 0;
598 }
599 
600 
601 /*
602  * PCM section
603  */
604 
605 /*
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
608  * correctly...
609  */
610 static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
611 {
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;
615         unsigned int curptr;
616         int timeout = 1000;
617 
618         while (timeout--) {
619                 curptr = readl(chip->remap_addr + dma->ops->dt_cur);
620                 if (curptr < dma->buf_addr)
621                         continue;
622                 curptr -= dma->buf_addr;
623                 if (curptr >= dma->buf_bytes)
624                         continue;
625                 return bytes_to_frames(runtime, curptr);
626         }
627         dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
628                    readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
629         return 0;
630 }
631 
632 /*
633  * XRUN detected, and stop the PCM substream
634  */
635 static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
636                                 struct atiixp_dma *dma)
637 {
638         if (! dma->substream || ! dma->running)
639                 return;
640         dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
641         snd_pcm_stream_lock(dma->substream);
642         snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
643         snd_pcm_stream_unlock(dma->substream);
644 }
645 
646 /*
647  * the period ack.  update the substream.
648  */
649 static void snd_atiixp_update_dma(struct atiixp_modem *chip,
650                                   struct atiixp_dma *dma)
651 {
652         if (! dma->substream || ! dma->running)
653                 return;
654         snd_pcm_period_elapsed(dma->substream);
655 }
656 
657 /* set BUS_BUSY interrupt bit if any DMA is running */
658 /* call with spinlock held */
659 static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
660 {
661         unsigned int bus_busy;
662         if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
663                                       ATI_REG_CMD_MODEM_RECEIVE_EN))
664                 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
665         else
666                 bus_busy = 0;
667         atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
668 }
669 
670 /* common trigger callback
671  * calling the lowlevel callbacks in it
672  */
673 static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
674 {
675         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
676         struct atiixp_dma *dma = substream->runtime->private_data;
677         int err = 0;
678 
679         if (snd_BUG_ON(!dma->ops->enable_transfer ||
680                        !dma->ops->flush_dma))
681                 return -EINVAL;
682 
683         spin_lock(&chip->reg_lock);
684         switch(cmd) {
685         case SNDRV_PCM_TRIGGER_START:
686                 dma->ops->enable_transfer(chip, 1);
687                 dma->running = 1;
688                 break;
689         case SNDRV_PCM_TRIGGER_STOP:
690                 dma->ops->enable_transfer(chip, 0);
691                 dma->running = 0;
692                 break;
693         default:
694                 err = -EINVAL;
695                 break;
696         }
697         if (! err) {
698         snd_atiixp_check_bus_busy(chip);
699         if (cmd == SNDRV_PCM_TRIGGER_STOP) {
700                 dma->ops->flush_dma(chip);
701                 snd_atiixp_check_bus_busy(chip);
702         }
703         }
704         spin_unlock(&chip->reg_lock);
705         return err;
706 }
707 
708 
709 /*
710  * lowlevel callbacks for each DMA type
711  *
712  * every callback is supposed to be called in chip->reg_lock spinlock
713  */
714 
715 /* flush FIFO of analog OUT DMA */
716 static void atiixp_out_flush_dma(struct atiixp_modem *chip)
717 {
718         atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
719 }
720 
721 /* enable/disable analog OUT DMA */
722 static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
723 {
724         unsigned int data;
725         data = atiixp_read(chip, CMD);
726         if (on) {
727                 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
728                         return;
729                 atiixp_out_flush_dma(chip);
730                 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
731         } else
732                 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
733         atiixp_write(chip, CMD, data);
734 }
735 
736 /* start/stop transfer over OUT DMA */
737 static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
738 {
739         atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
740                       on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
741 }
742 
743 /* enable/disable analog IN DMA */
744 static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
745 {
746         atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
747                       on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
748 }
749 
750 /* start/stop analog IN DMA */
751 static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
752 {
753         if (on) {
754                 unsigned int data = atiixp_read(chip, CMD);
755                 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
756                         data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
757                         atiixp_write(chip, CMD, data);
758                 }
759         } else
760                 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
761 }
762 
763 /* flush FIFO of analog IN DMA */
764 static void atiixp_in_flush_dma(struct atiixp_modem *chip)
765 {
766         atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
767 }
768 
769 /* set up slots and formats for analog OUT */
770 static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
771 {
772         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
773         unsigned int data;
774 
775         spin_lock_irq(&chip->reg_lock);
776         /* set output threshold */
777         data = atiixp_read(chip, MODEM_OUT_FIFO);
778         data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
779         data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
780         atiixp_write(chip, MODEM_OUT_FIFO, data);
781         spin_unlock_irq(&chip->reg_lock);
782         return 0;
783 }
784 
785 /* set up slots and formats for analog IN */
786 static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
787 {
788         return 0;
789 }
790 
791 /*
792  * hw_params - allocate the buffer and set up buffer descriptors
793  */
794 static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
795                                    struct snd_pcm_hw_params *hw_params)
796 {
797         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
798         struct atiixp_dma *dma = substream->runtime->private_data;
799         int err;
800         int i;
801 
802         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
803         if (err < 0)
804                 return err;
805         dma->buf_addr = substream->runtime->dma_addr;
806         dma->buf_bytes = params_buffer_bytes(hw_params);
807 
808         err = atiixp_build_dma_packets(chip, dma, substream,
809                                        params_periods(hw_params),
810                                        params_period_bytes(hw_params));
811         if (err < 0)
812                 return err;
813 
814         /* set up modem rate */
815         for (i = 0; i < NUM_ATI_CODECS; i++) {
816                 if (! chip->ac97[i])
817                         continue;
818                 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
819                 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
820         }
821 
822         return err;
823 }
824 
825 static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
826 {
827         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
828         struct atiixp_dma *dma = substream->runtime->private_data;
829 
830         atiixp_clear_dma_packets(chip, dma, substream);
831         snd_pcm_lib_free_pages(substream);
832         return 0;
833 }
834 
835 
836 /*
837  * pcm hardware definition, identical for all DMA types
838  */
839 static struct snd_pcm_hardware snd_atiixp_pcm_hw =
840 {
841         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
842                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
843                                  SNDRV_PCM_INFO_MMAP_VALID),
844         .formats =              SNDRV_PCM_FMTBIT_S16_LE,
845         .rates =                (SNDRV_PCM_RATE_8000 |
846                                  SNDRV_PCM_RATE_16000 |
847                                  SNDRV_PCM_RATE_KNOT),
848         .rate_min =             8000,
849         .rate_max =             16000,
850         .channels_min =         2,
851         .channels_max =         2,
852         .buffer_bytes_max =     256 * 1024,
853         .period_bytes_min =     32,
854         .period_bytes_max =     128 * 1024,
855         .periods_min =          2,
856         .periods_max =          ATI_MAX_DESCRIPTORS,
857 };
858 
859 static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
860                                struct atiixp_dma *dma, int pcm_type)
861 {
862         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
863         struct snd_pcm_runtime *runtime = substream->runtime;
864         int err;
865         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
866         static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
867                 .count = ARRAY_SIZE(rates),
868                 .list = rates,
869                 .mask = 0,
870         };
871 
872         if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
873                 return -EINVAL;
874 
875         if (dma->opened)
876                 return -EBUSY;
877         dma->substream = substream;
878         runtime->hw = snd_atiixp_pcm_hw;
879         dma->ac97_pcm_type = pcm_type;
880         if ((err = snd_pcm_hw_constraint_list(runtime, 0,
881                                               SNDRV_PCM_HW_PARAM_RATE,
882                                               &hw_constraints_rates)) < 0)
883                 return err;
884         if ((err = snd_pcm_hw_constraint_integer(runtime,
885                                                  SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
886                 return err;
887         runtime->private_data = dma;
888 
889         /* enable DMA bits */
890         spin_lock_irq(&chip->reg_lock);
891         dma->ops->enable_dma(chip, 1);
892         spin_unlock_irq(&chip->reg_lock);
893         dma->opened = 1;
894 
895         return 0;
896 }
897 
898 static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
899                                 struct atiixp_dma *dma)
900 {
901         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
902         /* disable DMA bits */
903         if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
904                 return -EINVAL;
905         spin_lock_irq(&chip->reg_lock);
906         dma->ops->enable_dma(chip, 0);
907         spin_unlock_irq(&chip->reg_lock);
908         dma->substream = NULL;
909         dma->opened = 0;
910         return 0;
911 }
912 
913 /*
914  */
915 static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
916 {
917         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
918         int err;
919 
920         mutex_lock(&chip->open_mutex);
921         err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
922         mutex_unlock(&chip->open_mutex);
923         if (err < 0)
924                 return err;
925         return 0;
926 }
927 
928 static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
929 {
930         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
931         int err;
932         mutex_lock(&chip->open_mutex);
933         err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
934         mutex_unlock(&chip->open_mutex);
935         return err;
936 }
937 
938 static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
939 {
940         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
941         return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
942 }
943 
944 static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
945 {
946         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
947         return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
948 }
949 
950 
951 /* AC97 playback */
952 static struct snd_pcm_ops snd_atiixp_playback_ops = {
953         .open =         snd_atiixp_playback_open,
954         .close =        snd_atiixp_playback_close,
955         .ioctl =        snd_pcm_lib_ioctl,
956         .hw_params =    snd_atiixp_pcm_hw_params,
957         .hw_free =      snd_atiixp_pcm_hw_free,
958         .prepare =      snd_atiixp_playback_prepare,
959         .trigger =      snd_atiixp_pcm_trigger,
960         .pointer =      snd_atiixp_pcm_pointer,
961 };
962 
963 /* AC97 capture */
964 static struct snd_pcm_ops snd_atiixp_capture_ops = {
965         .open =         snd_atiixp_capture_open,
966         .close =        snd_atiixp_capture_close,
967         .ioctl =        snd_pcm_lib_ioctl,
968         .hw_params =    snd_atiixp_pcm_hw_params,
969         .hw_free =      snd_atiixp_pcm_hw_free,
970         .prepare =      snd_atiixp_capture_prepare,
971         .trigger =      snd_atiixp_pcm_trigger,
972         .pointer =      snd_atiixp_pcm_pointer,
973 };
974 
975 static struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
976         .type = ATI_DMA_PLAYBACK,
977         .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
978         .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
979         .enable_dma = atiixp_out_enable_dma,
980         .enable_transfer = atiixp_out_enable_transfer,
981         .flush_dma = atiixp_out_flush_dma,
982 };
983         
984 static struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
985         .type = ATI_DMA_CAPTURE,
986         .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
987         .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
988         .enable_dma = atiixp_in_enable_dma,
989         .enable_transfer = atiixp_in_enable_transfer,
990         .flush_dma = atiixp_in_flush_dma,
991 };
992 
993 static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
994 {
995         struct snd_pcm *pcm;
996         int err;
997 
998         /* initialize constants */
999         chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
1000         chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
1001 
1002         /* PCM #0: analog I/O */
1003         err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
1004         if (err < 0)
1005                 return err;
1006         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
1007         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
1008         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
1009         pcm->private_data = chip;
1010         strcpy(pcm->name, "ATI IXP MC97");
1011         chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
1012 
1013         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1014                                               snd_dma_pci_data(chip->pci),
1015                                               64*1024, 128*1024);
1016 
1017         return 0;
1018 }
1019 
1020 
1021 
1022 /*
1023  * interrupt handler
1024  */
1025 static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1026 {
1027         struct atiixp_modem *chip = dev_id;
1028         unsigned int status;
1029 
1030         status = atiixp_read(chip, ISR);
1031 
1032         if (! status)
1033                 return IRQ_NONE;
1034 
1035         /* process audio DMA */
1036         if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1037                 snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_PLAYBACK]);
1038         else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1039                 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1040         if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1041                 snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_CAPTURE]);
1042         else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1043                 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1044 
1045         /* for codec detection */
1046         if (status & CODEC_CHECK_BITS) {
1047                 unsigned int detected;
1048                 detected = status & CODEC_CHECK_BITS;
1049                 spin_lock(&chip->reg_lock);
1050                 chip->codec_not_ready_bits |= detected;
1051                 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1052                 spin_unlock(&chip->reg_lock);
1053         }
1054 
1055         /* ack */
1056         atiixp_write(chip, ISR, status);
1057 
1058         return IRQ_HANDLED;
1059 }
1060 
1061 
1062 /*
1063  * ac97 mixer section
1064  */
1065 
1066 static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1067 {
1068         struct snd_ac97_bus *pbus;
1069         struct snd_ac97_template ac97;
1070         int i, err;
1071         int codec_count;
1072         static struct snd_ac97_bus_ops ops = {
1073                 .write = snd_atiixp_ac97_write,
1074                 .read = snd_atiixp_ac97_read,
1075         };
1076         static unsigned int codec_skip[NUM_ATI_CODECS] = {
1077                 ATI_REG_ISR_CODEC0_NOT_READY,
1078                 ATI_REG_ISR_CODEC1_NOT_READY,
1079                 ATI_REG_ISR_CODEC2_NOT_READY,
1080         };
1081 
1082         if (snd_atiixp_codec_detect(chip) < 0)
1083                 return -ENXIO;
1084 
1085         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
1086                 return err;
1087         pbus->clock = clock;
1088         chip->ac97_bus = pbus;
1089 
1090         codec_count = 0;
1091         for (i = 0; i < NUM_ATI_CODECS; i++) {
1092                 if (chip->codec_not_ready_bits & codec_skip[i])
1093                         continue;
1094                 memset(&ac97, 0, sizeof(ac97));
1095                 ac97.private_data = chip;
1096                 ac97.pci = chip->pci;
1097                 ac97.num = i;
1098                 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1099                 if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1100                         chip->ac97[i] = NULL; /* to be sure */
1101                         dev_dbg(chip->card->dev,
1102                                 "codec %d not available for modem\n", i);
1103                         continue;
1104                 }
1105                 codec_count++;
1106         }
1107 
1108         if (! codec_count) {
1109                 dev_err(chip->card->dev, "no codec available\n");
1110                 return -ENODEV;
1111         }
1112 
1113         /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1114 
1115         return 0;
1116 }
1117 
1118 
1119 #ifdef CONFIG_PM_SLEEP
1120 /*
1121  * power management
1122  */
1123 static int snd_atiixp_suspend(struct device *dev)
1124 {
1125         struct pci_dev *pci = to_pci_dev(dev);
1126         struct snd_card *card = dev_get_drvdata(dev);
1127         struct atiixp_modem *chip = card->private_data;
1128         int i;
1129 
1130         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1131         for (i = 0; i < NUM_ATI_PCMDEVS; i++)
1132                 snd_pcm_suspend_all(chip->pcmdevs[i]);
1133         for (i = 0; i < NUM_ATI_CODECS; i++)
1134                 snd_ac97_suspend(chip->ac97[i]);
1135         snd_atiixp_aclink_down(chip);
1136         snd_atiixp_chip_stop(chip);
1137 
1138         pci_disable_device(pci);
1139         pci_save_state(pci);
1140         pci_set_power_state(pci, PCI_D3hot);
1141         return 0;
1142 }
1143 
1144 static int snd_atiixp_resume(struct device *dev)
1145 {
1146         struct pci_dev *pci = to_pci_dev(dev);
1147         struct snd_card *card = dev_get_drvdata(dev);
1148         struct atiixp_modem *chip = card->private_data;
1149         int i;
1150 
1151         pci_set_power_state(pci, PCI_D0);
1152         pci_restore_state(pci);
1153         if (pci_enable_device(pci) < 0) {
1154                 dev_err(dev, "pci_enable_device failed, disabling device\n");
1155                 snd_card_disconnect(card);
1156                 return -EIO;
1157         }
1158         pci_set_master(pci);
1159 
1160         snd_atiixp_aclink_reset(chip);
1161         snd_atiixp_chip_start(chip);
1162 
1163         for (i = 0; i < NUM_ATI_CODECS; i++)
1164                 snd_ac97_resume(chip->ac97[i]);
1165 
1166         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1167         return 0;
1168 }
1169 
1170 static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1171 #define SND_ATIIXP_PM_OPS       &snd_atiixp_pm
1172 #else
1173 #define SND_ATIIXP_PM_OPS       NULL
1174 #endif /* CONFIG_PM_SLEEP */
1175 
1176 #ifdef CONFIG_PROC_FS
1177 /*
1178  * proc interface for register dump
1179  */
1180 
1181 static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1182                                  struct snd_info_buffer *buffer)
1183 {
1184         struct atiixp_modem *chip = entry->private_data;
1185         int i;
1186 
1187         for (i = 0; i < 256; i += 4)
1188                 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1189 }
1190 
1191 static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1192 {
1193         struct snd_info_entry *entry;
1194 
1195         if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
1196                 snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
1197 }
1198 #else
1199 #define snd_atiixp_proc_init(chip)
1200 #endif
1201 
1202 
1203 /*
1204  * destructor
1205  */
1206 
1207 static int snd_atiixp_free(struct atiixp_modem *chip)
1208 {
1209         if (chip->irq < 0)
1210                 goto __hw_end;
1211         snd_atiixp_chip_stop(chip);
1212 
1213       __hw_end:
1214         if (chip->irq >= 0)
1215                 free_irq(chip->irq, chip);
1216         if (chip->remap_addr)
1217                 iounmap(chip->remap_addr);
1218         pci_release_regions(chip->pci);
1219         pci_disable_device(chip->pci);
1220         kfree(chip);
1221         return 0;
1222 }
1223 
1224 static int snd_atiixp_dev_free(struct snd_device *device)
1225 {
1226         struct atiixp_modem *chip = device->device_data;
1227         return snd_atiixp_free(chip);
1228 }
1229 
1230 /*
1231  * constructor for chip instance
1232  */
1233 static int snd_atiixp_create(struct snd_card *card,
1234                              struct pci_dev *pci,
1235                              struct atiixp_modem **r_chip)
1236 {
1237         static struct snd_device_ops ops = {
1238                 .dev_free =     snd_atiixp_dev_free,
1239         };
1240         struct atiixp_modem *chip;
1241         int err;
1242 
1243         if ((err = pci_enable_device(pci)) < 0)
1244                 return err;
1245 
1246         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1247         if (chip == NULL) {
1248                 pci_disable_device(pci);
1249                 return -ENOMEM;
1250         }
1251 
1252         spin_lock_init(&chip->reg_lock);
1253         mutex_init(&chip->open_mutex);
1254         chip->card = card;
1255         chip->pci = pci;
1256         chip->irq = -1;
1257         if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1258                 kfree(chip);
1259                 pci_disable_device(pci);
1260                 return err;
1261         }
1262         chip->addr = pci_resource_start(pci, 0);
1263         chip->remap_addr = pci_ioremap_bar(pci, 0);
1264         if (chip->remap_addr == NULL) {
1265                 dev_err(card->dev, "AC'97 space ioremap problem\n");
1266                 snd_atiixp_free(chip);
1267                 return -EIO;
1268         }
1269 
1270         if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1271                         KBUILD_MODNAME, chip)) {
1272                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1273                 snd_atiixp_free(chip);
1274                 return -EBUSY;
1275         }
1276         chip->irq = pci->irq;
1277         pci_set_master(pci);
1278         synchronize_irq(chip->irq);
1279 
1280         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1281                 snd_atiixp_free(chip);
1282                 return err;
1283         }
1284 
1285         *r_chip = chip;
1286         return 0;
1287 }
1288 
1289 
1290 static int snd_atiixp_probe(struct pci_dev *pci,
1291                             const struct pci_device_id *pci_id)
1292 {
1293         struct snd_card *card;
1294         struct atiixp_modem *chip;
1295         int err;
1296 
1297         err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1298         if (err < 0)
1299                 return err;
1300 
1301         strcpy(card->driver, "ATIIXP-MODEM");
1302         strcpy(card->shortname, "ATI IXP Modem");
1303         if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1304                 goto __error;
1305         card->private_data = chip;
1306 
1307         if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1308                 goto __error;
1309 
1310         if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1311                 goto __error;
1312 
1313         if ((err = snd_atiixp_pcm_new(chip)) < 0)
1314                 goto __error;
1315         
1316         snd_atiixp_proc_init(chip);
1317 
1318         snd_atiixp_chip_start(chip);
1319 
1320         sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1321                 card->shortname, pci->revision, chip->addr, chip->irq);
1322 
1323         if ((err = snd_card_register(card)) < 0)
1324                 goto __error;
1325 
1326         pci_set_drvdata(pci, card);
1327         return 0;
1328 
1329  __error:
1330         snd_card_free(card);
1331         return err;
1332 }
1333 
1334 static void snd_atiixp_remove(struct pci_dev *pci)
1335 {
1336         snd_card_free(pci_get_drvdata(pci));
1337 }
1338 
1339 static struct pci_driver atiixp_modem_driver = {
1340         .name = KBUILD_MODNAME,
1341         .id_table = snd_atiixp_ids,
1342         .probe = snd_atiixp_probe,
1343         .remove = snd_atiixp_remove,
1344         .driver = {
1345                 .pm = SND_ATIIXP_PM_OPS,
1346         },
1347 };
1348 
1349 module_pci_driver(atiixp_modem_driver);
1350 

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