[ALSA] sun-cs4231: code improvements
[sfrench/cifs-2.6.git] / sound / sparc / cs4231.c
1 /*
2  * Driver for CS4231 sound chips found on Sparcs.
3  * Copyright (C) 2002 David S. Miller <davem@redhat.com>
4  *
5  * Based entirely upon drivers/sbus/audio/cs4231.c which is:
6  * Copyright (C) 1996, 1997, 1998, 1998 Derrick J Brashear (shadow@andrew.cmu.edu)
7  * and also sound/isa/cs423x/cs4231_lib.c which is:
8  * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
9  */
10
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/slab.h>
14 #include <linux/delay.h>
15 #include <linux/init.h>
16 #include <linux/interrupt.h>
17 #include <linux/moduleparam.h>
18
19 #include <sound/driver.h>
20 #include <sound/core.h>
21 #include <sound/pcm.h>
22 #include <sound/info.h>
23 #include <sound/control.h>
24 #include <sound/timer.h>
25 #include <sound/initval.h>
26 #include <sound/pcm_params.h>
27
28 #include <asm/io.h>
29 #include <asm/irq.h>
30
31 #ifdef CONFIG_SBUS
32 #define SBUS_SUPPORT
33 #include <asm/sbus.h>
34 #endif
35
36 #if defined(CONFIG_PCI) && defined(CONFIG_SPARC64)
37 #define EBUS_SUPPORT
38 #include <linux/pci.h>
39 #include <asm/ebus.h>
40 #endif
41
42 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
43 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
44 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
45
46 module_param_array(index, int, NULL, 0444);
47 MODULE_PARM_DESC(index, "Index value for Sun CS4231 soundcard.");
48 module_param_array(id, charp, NULL, 0444);
49 MODULE_PARM_DESC(id, "ID string for Sun CS4231 soundcard.");
50 module_param_array(enable, bool, NULL, 0444);
51 MODULE_PARM_DESC(enable, "Enable Sun CS4231 soundcard.");
52 MODULE_AUTHOR("Jaroslav Kysela, Derrick J. Brashear and David S. Miller");
53 MODULE_DESCRIPTION("Sun CS4231");
54 MODULE_LICENSE("GPL");
55 MODULE_SUPPORTED_DEVICE("{{Sun,CS4231}}");
56
57 #ifdef SBUS_SUPPORT
58 struct sbus_dma_info {
59        spinlock_t      lock;
60        int             dir;
61        void __iomem    *regs;
62 };
63 #endif
64
65 struct snd_cs4231;
66 struct cs4231_dma_control {
67         void            (*prepare)(struct cs4231_dma_control *dma_cont, int dir);
68         void            (*enable)(struct cs4231_dma_control *dma_cont, int on);
69         int             (*request)(struct cs4231_dma_control *dma_cont, dma_addr_t bus_addr, size_t len);
70         unsigned int    (*address)(struct cs4231_dma_control *dma_cont);
71         void            (*preallocate)(struct snd_cs4231 *chip, struct snd_pcm *pcm); 
72 #ifdef EBUS_SUPPORT
73         struct          ebus_dma_info   ebus_info;
74 #endif
75 #ifdef SBUS_SUPPORT
76         struct          sbus_dma_info   sbus_info;
77 #endif
78 };
79
80 struct snd_cs4231 {
81         spinlock_t              lock;
82         void __iomem            *port;
83
84         struct cs4231_dma_control       p_dma;
85         struct cs4231_dma_control       c_dma;
86
87         u32                     flags;
88 #define CS4231_FLAG_EBUS        0x00000001
89 #define CS4231_FLAG_PLAYBACK    0x00000002
90 #define CS4231_FLAG_CAPTURE     0x00000004
91
92         struct snd_card         *card;
93         struct snd_pcm          *pcm;
94         struct snd_pcm_substream        *playback_substream;
95         unsigned int            p_periods_sent;
96         struct snd_pcm_substream        *capture_substream;
97         unsigned int            c_periods_sent;
98         struct snd_timer        *timer;
99
100         unsigned short mode;
101 #define CS4231_MODE_NONE        0x0000
102 #define CS4231_MODE_PLAY        0x0001
103 #define CS4231_MODE_RECORD      0x0002
104 #define CS4231_MODE_TIMER       0x0004
105 #define CS4231_MODE_OPEN        (CS4231_MODE_PLAY|CS4231_MODE_RECORD|CS4231_MODE_TIMER)
106
107         unsigned char           image[32];      /* registers image */
108         int                     mce_bit;
109         int                     calibrate_mute;
110         struct mutex            mce_mutex;
111         struct mutex            open_mutex;
112
113         union {
114 #ifdef SBUS_SUPPORT
115                 struct sbus_dev         *sdev;
116 #endif
117 #ifdef EBUS_SUPPORT
118                 struct pci_dev          *pdev;
119 #endif
120         } dev_u;
121         unsigned int            irq[2];
122         unsigned int            regs_size;
123         struct snd_cs4231       *next;
124 };
125
126 static struct snd_cs4231 *cs4231_list;
127
128 /* Eventually we can use sound/isa/cs423x/cs4231_lib.c directly, but for
129  * now....  -DaveM
130  */
131
132 /* IO ports */
133
134 #define CS4231P(chip, x)        ((chip)->port + c_d_c_CS4231##x)
135
136 /* XXX offsets are different than PC ISA chips... */
137 #define c_d_c_CS4231REGSEL      0x0
138 #define c_d_c_CS4231REG         0x4
139 #define c_d_c_CS4231STATUS      0x8
140 #define c_d_c_CS4231PIO         0xc
141
142 /* codec registers */
143
144 #define CS4231_LEFT_INPUT       0x00    /* left input control */
145 #define CS4231_RIGHT_INPUT      0x01    /* right input control */
146 #define CS4231_AUX1_LEFT_INPUT  0x02    /* left AUX1 input control */
147 #define CS4231_AUX1_RIGHT_INPUT 0x03    /* right AUX1 input control */
148 #define CS4231_AUX2_LEFT_INPUT  0x04    /* left AUX2 input control */
149 #define CS4231_AUX2_RIGHT_INPUT 0x05    /* right AUX2 input control */
150 #define CS4231_LEFT_OUTPUT      0x06    /* left output control register */
151 #define CS4231_RIGHT_OUTPUT     0x07    /* right output control register */
152 #define CS4231_PLAYBK_FORMAT    0x08    /* clock and data format - playback - bits 7-0 MCE */
153 #define CS4231_IFACE_CTRL       0x09    /* interface control - bits 7-2 MCE */
154 #define CS4231_PIN_CTRL         0x0a    /* pin control */
155 #define CS4231_TEST_INIT        0x0b    /* test and initialization */
156 #define CS4231_MISC_INFO        0x0c    /* miscellaneaous information */
157 #define CS4231_LOOPBACK         0x0d    /* loopback control */
158 #define CS4231_PLY_UPR_CNT      0x0e    /* playback upper base count */
159 #define CS4231_PLY_LWR_CNT      0x0f    /* playback lower base count */
160 #define CS4231_ALT_FEATURE_1    0x10    /* alternate #1 feature enable */
161 #define CS4231_ALT_FEATURE_2    0x11    /* alternate #2 feature enable */
162 #define CS4231_LEFT_LINE_IN     0x12    /* left line input control */
163 #define CS4231_RIGHT_LINE_IN    0x13    /* right line input control */
164 #define CS4231_TIMER_LOW        0x14    /* timer low byte */
165 #define CS4231_TIMER_HIGH       0x15    /* timer high byte */
166 #define CS4231_LEFT_MIC_INPUT   0x16    /* left MIC input control register (InterWave only) */
167 #define CS4231_RIGHT_MIC_INPUT  0x17    /* right MIC input control register (InterWave only) */
168 #define CS4236_EXT_REG          0x17    /* extended register access */
169 #define CS4231_IRQ_STATUS       0x18    /* irq status register */
170 #define CS4231_LINE_LEFT_OUTPUT 0x19    /* left line output control register (InterWave only) */
171 #define CS4231_VERSION          0x19    /* CS4231(A) - version values */
172 #define CS4231_MONO_CTRL        0x1a    /* mono input/output control */
173 #define CS4231_LINE_RIGHT_OUTPUT 0x1b   /* right line output control register (InterWave only) */
174 #define CS4235_LEFT_MASTER      0x1b    /* left master output control */
175 #define CS4231_REC_FORMAT       0x1c    /* clock and data format - record - bits 7-0 MCE */
176 #define CS4231_PLY_VAR_FREQ     0x1d    /* playback variable frequency */
177 #define CS4235_RIGHT_MASTER     0x1d    /* right master output control */
178 #define CS4231_REC_UPR_CNT      0x1e    /* record upper count */
179 #define CS4231_REC_LWR_CNT      0x1f    /* record lower count */
180
181 /* definitions for codec register select port - CODECP( REGSEL ) */
182
183 #define CS4231_INIT             0x80    /* CODEC is initializing */
184 #define CS4231_MCE              0x40    /* mode change enable */
185 #define CS4231_TRD              0x20    /* transfer request disable */
186
187 /* definitions for codec status register - CODECP( STATUS ) */
188
189 #define CS4231_GLOBALIRQ        0x01    /* IRQ is active */
190
191 /* definitions for codec irq status - CS4231_IRQ_STATUS */
192
193 #define CS4231_PLAYBACK_IRQ     0x10
194 #define CS4231_RECORD_IRQ       0x20
195 #define CS4231_TIMER_IRQ        0x40
196 #define CS4231_ALL_IRQS         0x70
197 #define CS4231_REC_UNDERRUN     0x08
198 #define CS4231_REC_OVERRUN      0x04
199 #define CS4231_PLY_OVERRUN      0x02
200 #define CS4231_PLY_UNDERRUN     0x01
201
202 /* definitions for CS4231_LEFT_INPUT and CS4231_RIGHT_INPUT registers */
203
204 #define CS4231_ENABLE_MIC_GAIN  0x20
205
206 #define CS4231_MIXS_LINE        0x00
207 #define CS4231_MIXS_AUX1        0x40
208 #define CS4231_MIXS_MIC         0x80
209 #define CS4231_MIXS_ALL         0xc0
210
211 /* definitions for clock and data format register - CS4231_PLAYBK_FORMAT */
212
213 #define CS4231_LINEAR_8         0x00    /* 8-bit unsigned data */
214 #define CS4231_ALAW_8           0x60    /* 8-bit A-law companded */
215 #define CS4231_ULAW_8           0x20    /* 8-bit U-law companded */
216 #define CS4231_LINEAR_16        0x40    /* 16-bit twos complement data - little endian */
217 #define CS4231_LINEAR_16_BIG    0xc0    /* 16-bit twos complement data - big endian */
218 #define CS4231_ADPCM_16         0xa0    /* 16-bit ADPCM */
219 #define CS4231_STEREO           0x10    /* stereo mode */
220 /* bits 3-1 define frequency divisor */
221 #define CS4231_XTAL1            0x00    /* 24.576 crystal */
222 #define CS4231_XTAL2            0x01    /* 16.9344 crystal */
223
224 /* definitions for interface control register - CS4231_IFACE_CTRL */
225
226 #define CS4231_RECORD_PIO       0x80    /* record PIO enable */
227 #define CS4231_PLAYBACK_PIO     0x40    /* playback PIO enable */
228 #define CS4231_CALIB_MODE       0x18    /* calibration mode bits */
229 #define CS4231_AUTOCALIB        0x08    /* auto calibrate */
230 #define CS4231_SINGLE_DMA       0x04    /* use single DMA channel */
231 #define CS4231_RECORD_ENABLE    0x02    /* record enable */
232 #define CS4231_PLAYBACK_ENABLE  0x01    /* playback enable */
233
234 /* definitions for pin control register - CS4231_PIN_CTRL */
235
236 #define CS4231_IRQ_ENABLE       0x02    /* enable IRQ */
237 #define CS4231_XCTL1            0x40    /* external control #1 */
238 #define CS4231_XCTL0            0x80    /* external control #0 */
239
240 /* definitions for test and init register - CS4231_TEST_INIT */
241
242 #define CS4231_CALIB_IN_PROGRESS 0x20   /* auto calibrate in progress */
243 #define CS4231_DMA_REQUEST      0x10    /* DMA request in progress */
244
245 /* definitions for misc control register - CS4231_MISC_INFO */
246
247 #define CS4231_MODE2            0x40    /* MODE 2 */
248 #define CS4231_IW_MODE3         0x6c    /* MODE 3 - InterWave enhanced mode */
249 #define CS4231_4236_MODE3       0xe0    /* MODE 3 - CS4236+ enhanced mode */
250
251 /* definitions for alternate feature 1 register - CS4231_ALT_FEATURE_1 */
252
253 #define CS4231_DACZ             0x01    /* zero DAC when underrun */
254 #define CS4231_TIMER_ENABLE     0x40    /* codec timer enable */
255 #define CS4231_OLB              0x80    /* output level bit */
256
257 /* SBUS DMA register defines.  */
258
259 #define APCCSR  0x10UL  /* APC DMA CSR */
260 #define APCCVA  0x20UL  /* APC Capture DMA Address */
261 #define APCCC   0x24UL  /* APC Capture Count */
262 #define APCCNVA 0x28UL  /* APC Capture DMA Next Address */
263 #define APCCNC  0x2cUL  /* APC Capture Next Count */
264 #define APCPVA  0x30UL  /* APC Play DMA Address */
265 #define APCPC   0x34UL  /* APC Play Count */
266 #define APCPNVA 0x38UL  /* APC Play DMA Next Address */
267 #define APCPNC  0x3cUL  /* APC Play Next Count */
268
269 /* Defines for SBUS DMA-routines */
270
271 #define APCVA  0x0UL    /* APC DMA Address */
272 #define APCC   0x4UL    /* APC Count */
273 #define APCNVA 0x8UL    /* APC DMA Next Address */
274 #define APCNC  0xcUL    /* APC Next Count */
275 #define APC_PLAY 0x30UL /* Play registers start at 0x30 */
276 #define APC_RECORD 0x20UL /* Record registers start at 0x20 */
277
278 /* APCCSR bits */
279
280 #define APC_INT_PENDING 0x800000 /* Interrupt Pending */
281 #define APC_PLAY_INT    0x400000 /* Playback interrupt */
282 #define APC_CAPT_INT    0x200000 /* Capture interrupt */
283 #define APC_GENL_INT    0x100000 /* General interrupt */
284 #define APC_XINT_ENA    0x80000  /* General ext int. enable */
285 #define APC_XINT_PLAY   0x40000  /* Playback ext intr */
286 #define APC_XINT_CAPT   0x20000  /* Capture ext intr */
287 #define APC_XINT_GENL   0x10000  /* Error ext intr */
288 #define APC_XINT_EMPT   0x8000   /* Pipe empty interrupt (0 write to pva) */
289 #define APC_XINT_PEMP   0x4000   /* Play pipe empty (pva and pnva not set) */
290 #define APC_XINT_PNVA   0x2000   /* Playback NVA dirty */
291 #define APC_XINT_PENA   0x1000   /* play pipe empty Int enable */
292 #define APC_XINT_COVF   0x800    /* Cap data dropped on floor */
293 #define APC_XINT_CNVA   0x400    /* Capture NVA dirty */
294 #define APC_XINT_CEMP   0x200    /* Capture pipe empty (cva and cnva not set) */
295 #define APC_XINT_CENA   0x100    /* Cap. pipe empty int enable */
296 #define APC_PPAUSE      0x80     /* Pause the play DMA */
297 #define APC_CPAUSE      0x40     /* Pause the capture DMA */
298 #define APC_CDC_RESET   0x20     /* CODEC RESET */
299 #define APC_PDMA_READY  0x08     /* Play DMA Go */
300 #define APC_CDMA_READY  0x04     /* Capture DMA Go */
301 #define APC_CHIP_RESET  0x01     /* Reset the chip */
302
303 /* EBUS DMA register offsets  */
304
305 #define EBDMA_CSR       0x00UL  /* Control/Status */
306 #define EBDMA_ADDR      0x04UL  /* DMA Address */
307 #define EBDMA_COUNT     0x08UL  /* DMA Count */
308
309 /*
310  *  Some variables
311  */
312
313 static unsigned char freq_bits[14] = {
314         /* 5510 */      0x00 | CS4231_XTAL2,
315         /* 6620 */      0x0E | CS4231_XTAL2,
316         /* 8000 */      0x00 | CS4231_XTAL1,
317         /* 9600 */      0x0E | CS4231_XTAL1,
318         /* 11025 */     0x02 | CS4231_XTAL2,
319         /* 16000 */     0x02 | CS4231_XTAL1,
320         /* 18900 */     0x04 | CS4231_XTAL2,
321         /* 22050 */     0x06 | CS4231_XTAL2,
322         /* 27042 */     0x04 | CS4231_XTAL1,
323         /* 32000 */     0x06 | CS4231_XTAL1,
324         /* 33075 */     0x0C | CS4231_XTAL2,
325         /* 37800 */     0x08 | CS4231_XTAL2,
326         /* 44100 */     0x0A | CS4231_XTAL2,
327         /* 48000 */     0x0C | CS4231_XTAL1
328 };
329
330 static unsigned int rates[14] = {
331         5510, 6620, 8000, 9600, 11025, 16000, 18900, 22050,
332         27042, 32000, 33075, 37800, 44100, 48000
333 };
334
335 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
336         .count  = ARRAY_SIZE(rates),
337         .list   = rates,
338 };
339
340 static int snd_cs4231_xrate(struct snd_pcm_runtime *runtime)
341 {
342         return snd_pcm_hw_constraint_list(runtime, 0,
343                                           SNDRV_PCM_HW_PARAM_RATE,
344                                           &hw_constraints_rates);
345 }
346
347 static unsigned char snd_cs4231_original_image[32] =
348 {
349         0x00,                   /* 00/00 - lic */
350         0x00,                   /* 01/01 - ric */
351         0x9f,                   /* 02/02 - la1ic */
352         0x9f,                   /* 03/03 - ra1ic */
353         0x9f,                   /* 04/04 - la2ic */
354         0x9f,                   /* 05/05 - ra2ic */
355         0xbf,                   /* 06/06 - loc */
356         0xbf,                   /* 07/07 - roc */
357         0x20,                   /* 08/08 - pdfr */
358         CS4231_AUTOCALIB,       /* 09/09 - ic */
359         0x00,                   /* 0a/10 - pc */
360         0x00,                   /* 0b/11 - ti */
361         CS4231_MODE2,           /* 0c/12 - mi */
362         0x00,                   /* 0d/13 - lbc */
363         0x00,                   /* 0e/14 - pbru */
364         0x00,                   /* 0f/15 - pbrl */
365         0x80,                   /* 10/16 - afei */
366         0x01,                   /* 11/17 - afeii */
367         0x9f,                   /* 12/18 - llic */
368         0x9f,                   /* 13/19 - rlic */
369         0x00,                   /* 14/20 - tlb */
370         0x00,                   /* 15/21 - thb */
371         0x00,                   /* 16/22 - la3mic/reserved */
372         0x00,                   /* 17/23 - ra3mic/reserved */
373         0x00,                   /* 18/24 - afs */
374         0x00,                   /* 19/25 - lamoc/version */
375         0x00,                   /* 1a/26 - mioc */
376         0x00,                   /* 1b/27 - ramoc/reserved */
377         0x20,                   /* 1c/28 - cdfr */
378         0x00,                   /* 1d/29 - res4 */
379         0x00,                   /* 1e/30 - cbru */
380         0x00,                   /* 1f/31 - cbrl */
381 };
382
383 static u8 __cs4231_readb(struct snd_cs4231 *cp, void __iomem *reg_addr)
384 {
385 #ifdef EBUS_SUPPORT
386         if (cp->flags & CS4231_FLAG_EBUS)
387                 return readb(reg_addr);
388         else
389 #endif
390 #ifdef SBUS_SUPPORT
391                 return sbus_readb(reg_addr);
392 #endif
393 }
394
395 static void __cs4231_writeb(struct snd_cs4231 *cp, u8 val, void __iomem *reg_addr)
396 {
397 #ifdef EBUS_SUPPORT
398         if (cp->flags & CS4231_FLAG_EBUS)
399                 return writeb(val, reg_addr);
400         else
401 #endif
402 #ifdef SBUS_SUPPORT
403                 return sbus_writeb(val, reg_addr);
404 #endif
405 }
406
407 /*
408  *  Basic I/O functions
409  */
410
411 static void snd_cs4231_ready(struct snd_cs4231 *chip)
412 {
413         int timeout;
414
415         for (timeout = 250;
416              timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
417              timeout--)
418                 udelay(100);
419 }
420
421 static void snd_cs4231_dout(struct snd_cs4231 *chip, unsigned char reg, unsigned char value)
422 {
423         snd_cs4231_ready(chip);
424 #ifdef CONFIG_SND_DEBUG
425         if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
426                 snd_printdd("out: auto calibration time out - reg = 0x%x, "
427                             "value = 0x%x\n",
428                             reg, value);
429 #endif
430         __cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
431         wmb();
432         __cs4231_writeb(chip, value, CS4231P(chip, REG));
433         mb();
434 }
435
436 static inline void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
437                      unsigned char mask, unsigned char value)
438 {
439         unsigned char tmp = (chip->image[reg] & mask) | value;
440
441         chip->image[reg] = tmp;
442         if (!chip->calibrate_mute)
443                 snd_cs4231_dout(chip, reg, tmp);
444 }
445
446 static void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg,
447                            unsigned char value)
448 {
449         snd_cs4231_dout(chip, reg, value);
450         chip->image[reg] = value;
451         mb();
452 }
453
454 static unsigned char snd_cs4231_in(struct snd_cs4231 *chip, unsigned char reg)
455 {
456         snd_cs4231_ready(chip);
457 #ifdef CONFIG_SND_DEBUG
458         if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
459                 snd_printdd("in: auto calibration time out - reg = 0x%x\n",
460                             reg);
461 #endif
462         __cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
463         mb();
464         return __cs4231_readb(chip, CS4231P(chip, REG));
465 }
466
467 /*
468  *  CS4231 detection / MCE routines
469  */
470
471 static void snd_cs4231_busy_wait(struct snd_cs4231 *chip)
472 {
473         int timeout;
474
475         /* huh.. looks like this sequence is proper for CS4231A chip (GUS MAX) */
476         for (timeout = 5; timeout > 0; timeout--)
477                 __cs4231_readb(chip, CS4231P(chip, REGSEL));
478
479         /* end of cleanup sequence */
480         for (timeout = 500;
481              timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
482              timeout--)
483                 msleep(1);
484 }
485
486 static void snd_cs4231_mce_up(struct snd_cs4231 *chip)
487 {
488         unsigned long flags;
489         int timeout;
490
491         spin_lock_irqsave(&chip->lock, flags);
492         snd_cs4231_ready(chip);
493 #ifdef CONFIG_SND_DEBUG
494         if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
495                 snd_printdd("mce_up - auto calibration time out (0)\n");
496 #endif
497         chip->mce_bit |= CS4231_MCE;
498         timeout = __cs4231_readb(chip, CS4231P(chip, REGSEL));
499         if (timeout == 0x80)
500                 snd_printdd("mce_up [%p]: serious init problem - codec still busy\n", chip->port);
501         if (!(timeout & CS4231_MCE))
502                 __cs4231_writeb(chip, chip->mce_bit | (timeout & 0x1f), CS4231P(chip, REGSEL));
503         spin_unlock_irqrestore(&chip->lock, flags);
504 }
505
506 static void snd_cs4231_mce_down(struct snd_cs4231 *chip)
507 {
508         unsigned long flags;
509         int timeout;
510
511         spin_lock_irqsave(&chip->lock, flags);
512         snd_cs4231_busy_wait(chip);
513 #ifdef CONFIG_SND_DEBUG
514         if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
515                 snd_printdd("mce_down [%p] - auto calibration time out (0)\n", CS4231P(chip, REGSEL));
516 #endif
517         chip->mce_bit &= ~CS4231_MCE;
518         timeout = __cs4231_readb(chip, CS4231P(chip, REGSEL));
519         __cs4231_writeb(chip, chip->mce_bit | (timeout & 0x1f), CS4231P(chip, REGSEL));
520         if (timeout == 0x80)
521                 snd_printdd("mce_down [%p]: serious init problem - codec still busy\n", chip->port);
522         if ((timeout & CS4231_MCE) == 0) {
523                 spin_unlock_irqrestore(&chip->lock, flags);
524                 return;
525         }
526         snd_cs4231_busy_wait(chip);
527
528         /* calibration process */
529
530         snd_cs4231_ready(chip);
531         snd_cs4231_ready(chip);
532         if ((snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0) {
533                 snd_printd("cs4231_mce_down - auto calibration time out (1)\n");
534                 spin_unlock_irqrestore(&chip->lock, flags);
535                 return;
536         }
537
538         /* in 10ms increments, check condition, up to 250ms */
539         timeout = 25;
540         while (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) {
541                 spin_unlock_irqrestore(&chip->lock, flags);
542                 if (--timeout < 0) {
543                         snd_printk("mce_down - auto calibration time out (2)\n");
544                         return;
545                 }
546                 msleep(10);
547                 spin_lock_irqsave(&chip->lock, flags);
548         }
549
550         /* in 10ms increments, check condition, up to 100ms */
551         timeout = 10;
552         while (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT) {
553                 spin_unlock_irqrestore(&chip->lock, flags);
554                 if (--timeout < 0) {
555                         snd_printk("mce_down - auto calibration time out (3)\n");
556                         return;
557                 }
558                 msleep(10);
559                 spin_lock_irqsave(&chip->lock, flags);
560         }
561         spin_unlock_irqrestore(&chip->lock, flags);
562 }
563
564 static void snd_cs4231_advance_dma(struct cs4231_dma_control *dma_cont,
565                                    struct snd_pcm_substream *substream,
566                                    unsigned int *periods_sent)
567 {
568         struct snd_pcm_runtime *runtime = substream->runtime;
569
570         while (1) {
571                 unsigned int period_size = snd_pcm_lib_period_bytes(substream);
572                 unsigned int offset = period_size * (*periods_sent);
573
574                 BUG_ON(period_size >= (1 << 24));
575
576                 if (dma_cont->request(dma_cont, runtime->dma_addr + offset, period_size))
577                         return;
578                 (*periods_sent) = ((*periods_sent) + 1) % runtime->periods;
579         }
580 }
581
582 static void cs4231_dma_trigger(struct snd_pcm_substream *substream,
583                                unsigned int what, int on)
584 {
585         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
586         struct cs4231_dma_control *dma_cont;
587
588         if (what & CS4231_PLAYBACK_ENABLE) {
589                 dma_cont = &chip->p_dma;
590                 if (on) {
591                         dma_cont->prepare(dma_cont, 0);
592                         dma_cont->enable(dma_cont, 1);
593                         snd_cs4231_advance_dma(dma_cont,
594                                 chip->playback_substream,
595                                 &chip->p_periods_sent);
596                 } else {
597                         dma_cont->enable(dma_cont, 0);
598                 }
599         }
600         if (what & CS4231_RECORD_ENABLE) {
601                 dma_cont = &chip->c_dma;
602                 if (on) {
603                         dma_cont->prepare(dma_cont, 1);
604                         dma_cont->enable(dma_cont, 1);
605                         snd_cs4231_advance_dma(dma_cont,
606                                 chip->capture_substream,
607                                 &chip->c_periods_sent);
608                 } else {
609                         dma_cont->enable(dma_cont, 0);
610                 }
611         }
612 }
613
614 static int snd_cs4231_trigger(struct snd_pcm_substream *substream, int cmd)
615 {
616         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
617         int result = 0;
618
619         switch (cmd) {
620         case SNDRV_PCM_TRIGGER_START:
621         case SNDRV_PCM_TRIGGER_STOP:
622         {
623                 unsigned int what = 0;
624                 struct snd_pcm_substream *s;
625                 unsigned long flags;
626
627                 snd_pcm_group_for_each_entry(s, substream) {
628                         if (s == chip->playback_substream) {
629                                 what |= CS4231_PLAYBACK_ENABLE;
630                                 snd_pcm_trigger_done(s, substream);
631                         } else if (s == chip->capture_substream) {
632                                 what |= CS4231_RECORD_ENABLE;
633                                 snd_pcm_trigger_done(s, substream);
634                         }
635                 }
636
637                 spin_lock_irqsave(&chip->lock, flags);
638                 if (cmd == SNDRV_PCM_TRIGGER_START) {
639                         cs4231_dma_trigger(substream, what, 1);
640                         chip->image[CS4231_IFACE_CTRL] |= what;
641                 } else {
642                         cs4231_dma_trigger(substream, what, 0);
643                         chip->image[CS4231_IFACE_CTRL] &= ~what;
644                 }
645                 snd_cs4231_out(chip, CS4231_IFACE_CTRL,
646                                chip->image[CS4231_IFACE_CTRL]);
647                 spin_unlock_irqrestore(&chip->lock, flags);
648                 break;
649         }
650         default:
651                 result = -EINVAL;
652                 break;
653         }
654
655         return result;
656 }
657
658 /*
659  *  CODEC I/O
660  */
661
662 static unsigned char snd_cs4231_get_rate(unsigned int rate)
663 {
664         int i;
665
666         for (i = 0; i < 14; i++)
667                 if (rate == rates[i])
668                         return freq_bits[i];
669         // snd_BUG();
670         return freq_bits[13];
671 }
672
673 static unsigned char snd_cs4231_get_format(struct snd_cs4231 *chip, int format, int channels)
674 {
675         unsigned char rformat;
676
677         rformat = CS4231_LINEAR_8;
678         switch (format) {
679         case SNDRV_PCM_FORMAT_MU_LAW:   rformat = CS4231_ULAW_8; break;
680         case SNDRV_PCM_FORMAT_A_LAW:    rformat = CS4231_ALAW_8; break;
681         case SNDRV_PCM_FORMAT_S16_LE:   rformat = CS4231_LINEAR_16; break;
682         case SNDRV_PCM_FORMAT_S16_BE:   rformat = CS4231_LINEAR_16_BIG; break;
683         case SNDRV_PCM_FORMAT_IMA_ADPCM:        rformat = CS4231_ADPCM_16; break;
684         }
685         if (channels > 1)
686                 rformat |= CS4231_STEREO;
687         return rformat;
688 }
689
690 static void snd_cs4231_calibrate_mute(struct snd_cs4231 *chip, int mute)
691 {
692         unsigned long flags;
693
694         mute = mute ? 1 : 0;
695         spin_lock_irqsave(&chip->lock, flags);
696         if (chip->calibrate_mute == mute) {
697                 spin_unlock_irqrestore(&chip->lock, flags);
698                 return;
699         }
700         if (!mute) {
701                 snd_cs4231_dout(chip, CS4231_LEFT_INPUT,
702                                 chip->image[CS4231_LEFT_INPUT]);
703                 snd_cs4231_dout(chip, CS4231_RIGHT_INPUT,
704                                 chip->image[CS4231_RIGHT_INPUT]);
705                 snd_cs4231_dout(chip, CS4231_LOOPBACK,
706                                 chip->image[CS4231_LOOPBACK]);
707         }
708         snd_cs4231_dout(chip, CS4231_AUX1_LEFT_INPUT,
709                         mute ? 0x80 : chip->image[CS4231_AUX1_LEFT_INPUT]);
710         snd_cs4231_dout(chip, CS4231_AUX1_RIGHT_INPUT,
711                         mute ? 0x80 : chip->image[CS4231_AUX1_RIGHT_INPUT]);
712         snd_cs4231_dout(chip, CS4231_AUX2_LEFT_INPUT,
713                         mute ? 0x80 : chip->image[CS4231_AUX2_LEFT_INPUT]);
714         snd_cs4231_dout(chip, CS4231_AUX2_RIGHT_INPUT,
715                         mute ? 0x80 : chip->image[CS4231_AUX2_RIGHT_INPUT]);
716         snd_cs4231_dout(chip, CS4231_LEFT_OUTPUT,
717                         mute ? 0x80 : chip->image[CS4231_LEFT_OUTPUT]);
718         snd_cs4231_dout(chip, CS4231_RIGHT_OUTPUT,
719                         mute ? 0x80 : chip->image[CS4231_RIGHT_OUTPUT]);
720         snd_cs4231_dout(chip, CS4231_LEFT_LINE_IN,
721                         mute ? 0x80 : chip->image[CS4231_LEFT_LINE_IN]);
722         snd_cs4231_dout(chip, CS4231_RIGHT_LINE_IN,
723                         mute ? 0x80 : chip->image[CS4231_RIGHT_LINE_IN]);
724         snd_cs4231_dout(chip, CS4231_MONO_CTRL,
725                         mute ? 0xc0 : chip->image[CS4231_MONO_CTRL]);
726         chip->calibrate_mute = mute;
727         spin_unlock_irqrestore(&chip->lock, flags);
728 }
729
730 static void snd_cs4231_playback_format(struct snd_cs4231 *chip, struct snd_pcm_hw_params *params,
731                                        unsigned char pdfr)
732 {
733         unsigned long flags;
734
735         mutex_lock(&chip->mce_mutex);
736         snd_cs4231_calibrate_mute(chip, 1);
737
738         snd_cs4231_mce_up(chip);
739
740         spin_lock_irqsave(&chip->lock, flags);
741         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
742                        (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) ?
743                        (pdfr & 0xf0) | (chip->image[CS4231_REC_FORMAT] & 0x0f) :
744                        pdfr);
745         spin_unlock_irqrestore(&chip->lock, flags);
746
747         snd_cs4231_mce_down(chip);
748
749         snd_cs4231_calibrate_mute(chip, 0);
750         mutex_unlock(&chip->mce_mutex);
751 }
752
753 static void snd_cs4231_capture_format(struct snd_cs4231 *chip, struct snd_pcm_hw_params *params,
754                                       unsigned char cdfr)
755 {
756         unsigned long flags;
757
758         mutex_lock(&chip->mce_mutex);
759         snd_cs4231_calibrate_mute(chip, 1);
760
761         snd_cs4231_mce_up(chip);
762
763         spin_lock_irqsave(&chip->lock, flags);
764         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
765                 snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
766                                ((chip->image[CS4231_PLAYBK_FORMAT]) & 0xf0) |
767                                (cdfr & 0x0f));
768                 spin_unlock_irqrestore(&chip->lock, flags);
769                 snd_cs4231_mce_down(chip);
770                 snd_cs4231_mce_up(chip);
771                 spin_lock_irqsave(&chip->lock, flags);
772         }
773         snd_cs4231_out(chip, CS4231_REC_FORMAT, cdfr);
774         spin_unlock_irqrestore(&chip->lock, flags);
775
776         snd_cs4231_mce_down(chip);
777
778         snd_cs4231_calibrate_mute(chip, 0);
779         mutex_unlock(&chip->mce_mutex);
780 }
781
782 /*
783  *  Timer interface
784  */
785
786 static unsigned long snd_cs4231_timer_resolution(struct snd_timer *timer)
787 {
788         struct snd_cs4231 *chip = snd_timer_chip(timer);
789
790         return chip->image[CS4231_PLAYBK_FORMAT] & 1 ? 9969 : 9920;
791 }
792
793 static int snd_cs4231_timer_start(struct snd_timer *timer)
794 {
795         unsigned long flags;
796         unsigned int ticks;
797         struct snd_cs4231 *chip = snd_timer_chip(timer);
798
799         spin_lock_irqsave(&chip->lock, flags);
800         ticks = timer->sticks;
801         if ((chip->image[CS4231_ALT_FEATURE_1] & CS4231_TIMER_ENABLE) == 0 ||
802             (unsigned char)(ticks >> 8) != chip->image[CS4231_TIMER_HIGH] ||
803             (unsigned char)ticks != chip->image[CS4231_TIMER_LOW]) {
804                 snd_cs4231_out(chip, CS4231_TIMER_HIGH,
805                                chip->image[CS4231_TIMER_HIGH] =
806                                (unsigned char) (ticks >> 8));
807                 snd_cs4231_out(chip, CS4231_TIMER_LOW,
808                                chip->image[CS4231_TIMER_LOW] =
809                                (unsigned char) ticks);
810                 snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
811                                chip->image[CS4231_ALT_FEATURE_1] | CS4231_TIMER_ENABLE);
812         }
813         spin_unlock_irqrestore(&chip->lock, flags);
814
815         return 0;
816 }
817
818 static int snd_cs4231_timer_stop(struct snd_timer *timer)
819 {
820         unsigned long flags;
821         struct snd_cs4231 *chip = snd_timer_chip(timer);
822
823         spin_lock_irqsave(&chip->lock, flags);
824         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
825                        chip->image[CS4231_ALT_FEATURE_1] &= ~CS4231_TIMER_ENABLE);
826         spin_unlock_irqrestore(&chip->lock, flags);
827
828         return 0;
829 }
830
831 static void __init snd_cs4231_init(struct snd_cs4231 *chip)
832 {
833         unsigned long flags;
834
835         snd_cs4231_mce_down(chip);
836
837 #ifdef SNDRV_DEBUG_MCE
838         snd_printdd("init: (1)\n");
839 #endif
840         snd_cs4231_mce_up(chip);
841         spin_lock_irqsave(&chip->lock, flags);
842         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
843                                             CS4231_RECORD_ENABLE | CS4231_RECORD_PIO |
844                                             CS4231_CALIB_MODE);
845         chip->image[CS4231_IFACE_CTRL] |= CS4231_AUTOCALIB;
846         snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
847         spin_unlock_irqrestore(&chip->lock, flags);
848         snd_cs4231_mce_down(chip);
849
850 #ifdef SNDRV_DEBUG_MCE
851         snd_printdd("init: (2)\n");
852 #endif
853
854         snd_cs4231_mce_up(chip);
855         spin_lock_irqsave(&chip->lock, flags);
856         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1]);
857         spin_unlock_irqrestore(&chip->lock, flags);
858         snd_cs4231_mce_down(chip);
859
860 #ifdef SNDRV_DEBUG_MCE
861         snd_printdd("init: (3) - afei = 0x%x\n", chip->image[CS4231_ALT_FEATURE_1]);
862 #endif
863
864         spin_lock_irqsave(&chip->lock, flags);
865         snd_cs4231_out(chip, CS4231_ALT_FEATURE_2, chip->image[CS4231_ALT_FEATURE_2]);
866         spin_unlock_irqrestore(&chip->lock, flags);
867
868         snd_cs4231_mce_up(chip);
869         spin_lock_irqsave(&chip->lock, flags);
870         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT]);
871         spin_unlock_irqrestore(&chip->lock, flags);
872         snd_cs4231_mce_down(chip);
873
874 #ifdef SNDRV_DEBUG_MCE
875         snd_printdd("init: (4)\n");
876 #endif
877
878         snd_cs4231_mce_up(chip);
879         spin_lock_irqsave(&chip->lock, flags);
880         snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT]);
881         spin_unlock_irqrestore(&chip->lock, flags);
882         snd_cs4231_mce_down(chip);
883
884 #ifdef SNDRV_DEBUG_MCE
885         snd_printdd("init: (5)\n");
886 #endif
887 }
888
889 static int snd_cs4231_open(struct snd_cs4231 *chip, unsigned int mode)
890 {
891         unsigned long flags;
892
893         mutex_lock(&chip->open_mutex);
894         if ((chip->mode & mode)) {
895                 mutex_unlock(&chip->open_mutex);
896                 return -EAGAIN;
897         }
898         if (chip->mode & CS4231_MODE_OPEN) {
899                 chip->mode |= mode;
900                 mutex_unlock(&chip->open_mutex);
901                 return 0;
902         }
903         /* ok. now enable and ack CODEC IRQ */
904         spin_lock_irqsave(&chip->lock, flags);
905         snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
906                        CS4231_RECORD_IRQ |
907                        CS4231_TIMER_IRQ);
908         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
909         __cs4231_writeb(chip, 0, CS4231P(chip, STATUS));        /* clear IRQ */
910         __cs4231_writeb(chip, 0, CS4231P(chip, STATUS));        /* clear IRQ */
911
912         snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
913                        CS4231_RECORD_IRQ |
914                        CS4231_TIMER_IRQ);
915         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
916
917         spin_unlock_irqrestore(&chip->lock, flags);
918
919         chip->mode = mode;
920         mutex_unlock(&chip->open_mutex);
921         return 0;
922 }
923
924 static void snd_cs4231_close(struct snd_cs4231 *chip, unsigned int mode)
925 {
926         unsigned long flags;
927
928         mutex_lock(&chip->open_mutex);
929         chip->mode &= ~mode;
930         if (chip->mode & CS4231_MODE_OPEN) {
931                 mutex_unlock(&chip->open_mutex);
932                 return;
933         }
934         snd_cs4231_calibrate_mute(chip, 1);
935
936         /* disable IRQ */
937         spin_lock_irqsave(&chip->lock, flags);
938         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
939         __cs4231_writeb(chip, 0, CS4231P(chip, STATUS));        /* clear IRQ */
940         __cs4231_writeb(chip, 0, CS4231P(chip, STATUS));        /* clear IRQ */
941
942         /* now disable record & playback */
943
944         if (chip->image[CS4231_IFACE_CTRL] &
945             (CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
946              CS4231_RECORD_ENABLE | CS4231_RECORD_PIO)) {
947                 spin_unlock_irqrestore(&chip->lock, flags);
948                 snd_cs4231_mce_up(chip);
949                 spin_lock_irqsave(&chip->lock, flags);
950                 chip->image[CS4231_IFACE_CTRL] &=
951                         ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
952                           CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
953                 snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
954                 spin_unlock_irqrestore(&chip->lock, flags);
955                 snd_cs4231_mce_down(chip);
956                 spin_lock_irqsave(&chip->lock, flags);
957         }
958
959         /* clear IRQ again */
960         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
961         __cs4231_writeb(chip, 0, CS4231P(chip, STATUS));        /* clear IRQ */
962         __cs4231_writeb(chip, 0, CS4231P(chip, STATUS));        /* clear IRQ */
963         spin_unlock_irqrestore(&chip->lock, flags);
964
965         snd_cs4231_calibrate_mute(chip, 0);
966
967         chip->mode = 0;
968         mutex_unlock(&chip->open_mutex);
969 }
970
971 /*
972  *  timer open/close
973  */
974
975 static int snd_cs4231_timer_open(struct snd_timer *timer)
976 {
977         struct snd_cs4231 *chip = snd_timer_chip(timer);
978         snd_cs4231_open(chip, CS4231_MODE_TIMER);
979         return 0;
980 }
981
982 static int snd_cs4231_timer_close(struct snd_timer * timer)
983 {
984         struct snd_cs4231 *chip = snd_timer_chip(timer);
985         snd_cs4231_close(chip, CS4231_MODE_TIMER);
986         return 0;
987 }
988
989 static struct snd_timer_hardware snd_cs4231_timer_table =
990 {
991         .flags          =       SNDRV_TIMER_HW_AUTO,
992         .resolution     =       9945,
993         .ticks          =       65535,
994         .open           =       snd_cs4231_timer_open,
995         .close          =       snd_cs4231_timer_close,
996         .c_resolution   =       snd_cs4231_timer_resolution,
997         .start          =       snd_cs4231_timer_start,
998         .stop           =       snd_cs4231_timer_stop,
999 };
1000
1001 /*
1002  *  ok.. exported functions..
1003  */
1004
1005 static int snd_cs4231_playback_hw_params(struct snd_pcm_substream *substream,
1006                                          struct snd_pcm_hw_params *hw_params)
1007 {
1008         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1009         unsigned char new_pdfr;
1010         int err;
1011
1012         if ((err = snd_pcm_lib_malloc_pages(substream,
1013                                             params_buffer_bytes(hw_params))) < 0)
1014                 return err;
1015         new_pdfr = snd_cs4231_get_format(chip, params_format(hw_params),
1016                                          params_channels(hw_params)) |
1017                 snd_cs4231_get_rate(params_rate(hw_params));
1018         snd_cs4231_playback_format(chip, hw_params, new_pdfr);
1019
1020         return 0;
1021 }
1022
1023 static int snd_cs4231_playback_prepare(struct snd_pcm_substream *substream)
1024 {
1025         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1026         struct snd_pcm_runtime *runtime = substream->runtime;
1027         unsigned long flags;
1028
1029         spin_lock_irqsave(&chip->lock, flags);
1030
1031         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE |
1032                                             CS4231_PLAYBACK_PIO);
1033
1034         BUG_ON(runtime->period_size > 0xffff + 1);
1035
1036         chip->p_periods_sent = 0;
1037         spin_unlock_irqrestore(&chip->lock, flags);
1038
1039         return 0;
1040 }
1041
1042 static int snd_cs4231_capture_hw_params(struct snd_pcm_substream *substream,
1043                                         struct snd_pcm_hw_params *hw_params)
1044 {
1045         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1046         unsigned char new_cdfr;
1047         int err;
1048
1049         if ((err = snd_pcm_lib_malloc_pages(substream,
1050                                             params_buffer_bytes(hw_params))) < 0)
1051                 return err;
1052         new_cdfr = snd_cs4231_get_format(chip, params_format(hw_params),
1053                                          params_channels(hw_params)) |
1054                 snd_cs4231_get_rate(params_rate(hw_params));
1055         snd_cs4231_capture_format(chip, hw_params, new_cdfr);
1056
1057         return 0;
1058 }
1059
1060 static int snd_cs4231_capture_prepare(struct snd_pcm_substream *substream)
1061 {
1062         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1063         unsigned long flags;
1064
1065         spin_lock_irqsave(&chip->lock, flags);
1066         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE |
1067                                             CS4231_RECORD_PIO);
1068
1069
1070         chip->c_periods_sent = 0;
1071         spin_unlock_irqrestore(&chip->lock, flags);
1072
1073         return 0;
1074 }
1075
1076 static void snd_cs4231_overrange(struct snd_cs4231 *chip)
1077 {
1078         unsigned long flags;
1079         unsigned char res;
1080
1081         spin_lock_irqsave(&chip->lock, flags);
1082         res = snd_cs4231_in(chip, CS4231_TEST_INIT);
1083         spin_unlock_irqrestore(&chip->lock, flags);
1084
1085         if (res & (0x08 | 0x02))        /* detect overrange only above 0dB; may be user selectable? */
1086                 chip->capture_substream->runtime->overrange++;
1087 }
1088
1089 static void snd_cs4231_play_callback(struct snd_cs4231 *chip)
1090 {
1091         if (chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE) {
1092                 snd_pcm_period_elapsed(chip->playback_substream);
1093                 snd_cs4231_advance_dma(&chip->p_dma, chip->playback_substream,
1094                                             &chip->p_periods_sent);
1095         }
1096 }
1097
1098 static void snd_cs4231_capture_callback(struct snd_cs4231 *chip)
1099 {
1100         if (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) {
1101                 snd_pcm_period_elapsed(chip->capture_substream);
1102                 snd_cs4231_advance_dma(&chip->c_dma, chip->capture_substream,
1103                                             &chip->c_periods_sent);
1104         }
1105 }
1106
1107 static snd_pcm_uframes_t snd_cs4231_playback_pointer(struct snd_pcm_substream *substream)
1108 {
1109         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1110         struct cs4231_dma_control *dma_cont = &chip->p_dma;
1111         size_t ptr;
1112         
1113         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
1114                 return 0;
1115         ptr = dma_cont->address(dma_cont);
1116         if (ptr != 0)
1117                 ptr -= substream->runtime->dma_addr;
1118         
1119         return bytes_to_frames(substream->runtime, ptr);
1120 }
1121
1122 static snd_pcm_uframes_t snd_cs4231_capture_pointer(struct snd_pcm_substream *substream)
1123 {
1124         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1125         struct cs4231_dma_control *dma_cont = &chip->c_dma;
1126         size_t ptr;
1127         
1128         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE))
1129                 return 0;
1130         ptr = dma_cont->address(dma_cont);
1131         if (ptr != 0)
1132                 ptr -= substream->runtime->dma_addr;
1133         
1134         return bytes_to_frames(substream->runtime, ptr);
1135 }
1136
1137 static int __init snd_cs4231_probe(struct snd_cs4231 *chip)
1138 {
1139         unsigned long flags;
1140         int i, id, vers;
1141         unsigned char *ptr;
1142
1143         id = vers = 0;
1144         for (i = 0; i < 50; i++) {
1145                 mb();
1146                 if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
1147                         udelay(2000);
1148                 else {
1149                         spin_lock_irqsave(&chip->lock, flags);
1150                         snd_cs4231_out(chip, CS4231_MISC_INFO, CS4231_MODE2);
1151                         id = snd_cs4231_in(chip, CS4231_MISC_INFO) & 0x0f;
1152                         vers = snd_cs4231_in(chip, CS4231_VERSION);
1153                         spin_unlock_irqrestore(&chip->lock, flags);
1154                         if (id == 0x0a)
1155                                 break;  /* this is valid value */
1156                 }
1157         }
1158         snd_printdd("cs4231: port = %p, id = 0x%x\n", chip->port, id);
1159         if (id != 0x0a)
1160                 return -ENODEV; /* no valid device found */
1161
1162         spin_lock_irqsave(&chip->lock, flags);
1163
1164         __cs4231_readb(chip, CS4231P(chip, STATUS));    /* clear any pendings IRQ */
1165         __cs4231_writeb(chip, 0, CS4231P(chip, STATUS));
1166         mb();
1167
1168         spin_unlock_irqrestore(&chip->lock, flags);
1169
1170         chip->image[CS4231_MISC_INFO] = CS4231_MODE2;
1171         chip->image[CS4231_IFACE_CTRL] =
1172                 chip->image[CS4231_IFACE_CTRL] & ~CS4231_SINGLE_DMA;
1173         chip->image[CS4231_ALT_FEATURE_1] = 0x80;
1174         chip->image[CS4231_ALT_FEATURE_2] = 0x01;
1175         if (vers & 0x20)
1176                 chip->image[CS4231_ALT_FEATURE_2] |= 0x02;
1177
1178         ptr = (unsigned char *) &chip->image;
1179
1180         snd_cs4231_mce_down(chip);
1181
1182         spin_lock_irqsave(&chip->lock, flags);
1183
1184         for (i = 0; i < 32; i++)        /* ok.. fill all CS4231 registers */
1185                 snd_cs4231_out(chip, i, *ptr++);
1186
1187         spin_unlock_irqrestore(&chip->lock, flags);
1188
1189         snd_cs4231_mce_up(chip);
1190
1191         snd_cs4231_mce_down(chip);
1192
1193         mdelay(2);
1194
1195         return 0;               /* all things are ok.. */
1196 }
1197
1198 static struct snd_pcm_hardware snd_cs4231_playback =
1199 {
1200         .info                   = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1201                                  SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
1202         .formats                = (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
1203                                  SNDRV_PCM_FMTBIT_IMA_ADPCM |
1204                                  SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1205                                  SNDRV_PCM_FMTBIT_S16_BE),
1206         .rates                  = SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
1207         .rate_min               = 5510,
1208         .rate_max               = 48000,
1209         .channels_min           = 1,
1210         .channels_max           = 2,
1211         .buffer_bytes_max       = (32*1024),
1212         .period_bytes_min       = 64,
1213         .period_bytes_max       = (32*1024),
1214         .periods_min            = 1,
1215         .periods_max            = 1024,
1216 };
1217
1218 static struct snd_pcm_hardware snd_cs4231_capture =
1219 {
1220         .info                   = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1221                                  SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
1222         .formats                = (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
1223                                  SNDRV_PCM_FMTBIT_IMA_ADPCM |
1224                                  SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1225                                  SNDRV_PCM_FMTBIT_S16_BE),
1226         .rates                  = SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
1227         .rate_min               = 5510,
1228         .rate_max               = 48000,
1229         .channels_min           = 1,
1230         .channels_max           = 2,
1231         .buffer_bytes_max       = (32*1024),
1232         .period_bytes_min       = 64,
1233         .period_bytes_max       = (32*1024),
1234         .periods_min            = 1,
1235         .periods_max            = 1024,
1236 };
1237
1238 static int snd_cs4231_playback_open(struct snd_pcm_substream *substream)
1239 {
1240         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1241         struct snd_pcm_runtime *runtime = substream->runtime;
1242         int err;
1243
1244         runtime->hw = snd_cs4231_playback;
1245
1246         if ((err = snd_cs4231_open(chip, CS4231_MODE_PLAY)) < 0) {
1247                 snd_free_pages(runtime->dma_area, runtime->dma_bytes);
1248                 return err;
1249         }
1250         chip->playback_substream = substream;
1251         chip->p_periods_sent = 0;
1252         snd_pcm_set_sync(substream);
1253         snd_cs4231_xrate(runtime);
1254
1255         return 0;
1256 }
1257
1258 static int snd_cs4231_capture_open(struct snd_pcm_substream *substream)
1259 {
1260         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1261         struct snd_pcm_runtime *runtime = substream->runtime;
1262         int err;
1263
1264         runtime->hw = snd_cs4231_capture;
1265
1266         if ((err = snd_cs4231_open(chip, CS4231_MODE_RECORD)) < 0) {
1267                 snd_free_pages(runtime->dma_area, runtime->dma_bytes);
1268                 return err;
1269         }
1270         chip->capture_substream = substream;
1271         chip->c_periods_sent = 0;
1272         snd_pcm_set_sync(substream);
1273         snd_cs4231_xrate(runtime);
1274
1275         return 0;
1276 }
1277
1278 static int snd_cs4231_playback_close(struct snd_pcm_substream *substream)
1279 {
1280         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1281
1282         snd_cs4231_close(chip, CS4231_MODE_PLAY);
1283         chip->playback_substream = NULL;
1284
1285         return 0;
1286 }
1287
1288 static int snd_cs4231_capture_close(struct snd_pcm_substream *substream)
1289 {
1290         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1291
1292         snd_cs4231_close(chip, CS4231_MODE_RECORD);
1293         chip->capture_substream = NULL;
1294
1295         return 0;
1296 }
1297
1298 /* XXX We can do some power-management, in particular on EBUS using
1299  * XXX the audio AUXIO register...
1300  */
1301
1302 static struct snd_pcm_ops snd_cs4231_playback_ops = {
1303         .open           =       snd_cs4231_playback_open,
1304         .close          =       snd_cs4231_playback_close,
1305         .ioctl          =       snd_pcm_lib_ioctl,
1306         .hw_params      =       snd_cs4231_playback_hw_params,
1307         .hw_free        =       snd_pcm_lib_free_pages,
1308         .prepare        =       snd_cs4231_playback_prepare,
1309         .trigger        =       snd_cs4231_trigger,
1310         .pointer        =       snd_cs4231_playback_pointer,
1311 };
1312
1313 static struct snd_pcm_ops snd_cs4231_capture_ops = {
1314         .open           =       snd_cs4231_capture_open,
1315         .close          =       snd_cs4231_capture_close,
1316         .ioctl          =       snd_pcm_lib_ioctl,
1317         .hw_params      =       snd_cs4231_capture_hw_params,
1318         .hw_free        =       snd_pcm_lib_free_pages,
1319         .prepare        =       snd_cs4231_capture_prepare,
1320         .trigger        =       snd_cs4231_trigger,
1321         .pointer        =       snd_cs4231_capture_pointer,
1322 };
1323
1324 static int __init snd_cs4231_pcm(struct snd_card *card)
1325 {
1326         struct snd_cs4231 *chip = card->private_data;
1327         struct snd_pcm *pcm;
1328         int err;
1329
1330         err = snd_pcm_new(card, "CS4231", 0, 1, 1, &pcm);
1331         if (err < 0)
1332                 return err;
1333
1334         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs4231_playback_ops);
1335         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs4231_capture_ops);
1336         
1337         /* global setup */
1338         pcm->private_data = chip;
1339         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
1340         strcpy(pcm->name, "CS4231");
1341
1342         chip->p_dma.preallocate(chip, pcm);
1343
1344         chip->pcm = pcm;
1345
1346         return 0;
1347 }
1348
1349 static int __init snd_cs4231_timer(struct snd_card *card)
1350 {
1351         struct snd_cs4231 *chip = card->private_data;
1352         struct snd_timer *timer;
1353         struct snd_timer_id tid;
1354         int err;
1355
1356         /* Timer initialization */
1357         tid.dev_class = SNDRV_TIMER_CLASS_CARD;
1358         tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
1359         tid.card = card->number;
1360         tid.device = 0;
1361         tid.subdevice = 0;
1362         err = snd_timer_new(card, "CS4231", &tid, &timer);
1363         if (err < 0)
1364                 return err;
1365         strcpy(timer->name, "CS4231");
1366         timer->private_data = chip;
1367         timer->hw = snd_cs4231_timer_table;
1368         chip->timer = timer;
1369
1370         return 0;
1371 }
1372         
1373 /*
1374  *  MIXER part
1375  */
1376
1377 static int snd_cs4231_info_mux(struct snd_kcontrol *kcontrol,
1378                                struct snd_ctl_elem_info *uinfo)
1379 {
1380         static char *texts[4] = {
1381                 "Line", "CD", "Mic", "Mix"
1382         };
1383
1384         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1385         uinfo->count = 2;
1386         uinfo->value.enumerated.items = 4;
1387         if (uinfo->value.enumerated.item > 3)
1388                 uinfo->value.enumerated.item = 3;
1389         strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
1390
1391         return 0;
1392 }
1393
1394 static int snd_cs4231_get_mux(struct snd_kcontrol *kcontrol,
1395                               struct snd_ctl_elem_value *ucontrol)
1396 {
1397         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1398         unsigned long flags;
1399         
1400         spin_lock_irqsave(&chip->lock, flags);
1401         ucontrol->value.enumerated.item[0] =
1402                 (chip->image[CS4231_LEFT_INPUT] & CS4231_MIXS_ALL) >> 6;
1403         ucontrol->value.enumerated.item[1] =
1404                 (chip->image[CS4231_RIGHT_INPUT] & CS4231_MIXS_ALL) >> 6;
1405         spin_unlock_irqrestore(&chip->lock, flags);
1406
1407         return 0;
1408 }
1409
1410 static int snd_cs4231_put_mux(struct snd_kcontrol *kcontrol,
1411                               struct snd_ctl_elem_value *ucontrol)
1412 {
1413         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1414         unsigned long flags;
1415         unsigned short left, right;
1416         int change;
1417         
1418         if (ucontrol->value.enumerated.item[0] > 3 ||
1419             ucontrol->value.enumerated.item[1] > 3)
1420                 return -EINVAL;
1421         left = ucontrol->value.enumerated.item[0] << 6;
1422         right = ucontrol->value.enumerated.item[1] << 6;
1423
1424         spin_lock_irqsave(&chip->lock, flags);
1425
1426         left = (chip->image[CS4231_LEFT_INPUT] & ~CS4231_MIXS_ALL) | left;
1427         right = (chip->image[CS4231_RIGHT_INPUT] & ~CS4231_MIXS_ALL) | right;
1428         change = left != chip->image[CS4231_LEFT_INPUT] ||
1429                  right != chip->image[CS4231_RIGHT_INPUT];
1430         snd_cs4231_out(chip, CS4231_LEFT_INPUT, left);
1431         snd_cs4231_out(chip, CS4231_RIGHT_INPUT, right);
1432
1433         spin_unlock_irqrestore(&chip->lock, flags);
1434
1435         return change;
1436 }
1437
1438 static int snd_cs4231_info_single(struct snd_kcontrol *kcontrol,
1439                                   struct snd_ctl_elem_info *uinfo)
1440 {
1441         int mask = (kcontrol->private_value >> 16) & 0xff;
1442
1443         uinfo->type = (mask == 1) ?
1444                 SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1445         uinfo->count = 1;
1446         uinfo->value.integer.min = 0;
1447         uinfo->value.integer.max = mask;
1448
1449         return 0;
1450 }
1451
1452 static int snd_cs4231_get_single(struct snd_kcontrol *kcontrol,
1453                                  struct snd_ctl_elem_value *ucontrol)
1454 {
1455         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1456         unsigned long flags;
1457         int reg = kcontrol->private_value & 0xff;
1458         int shift = (kcontrol->private_value >> 8) & 0xff;
1459         int mask = (kcontrol->private_value >> 16) & 0xff;
1460         int invert = (kcontrol->private_value >> 24) & 0xff;
1461         
1462         spin_lock_irqsave(&chip->lock, flags);
1463
1464         ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;
1465
1466         spin_unlock_irqrestore(&chip->lock, flags);
1467
1468         if (invert)
1469                 ucontrol->value.integer.value[0] =
1470                         (mask - ucontrol->value.integer.value[0]);
1471
1472         return 0;
1473 }
1474
1475 static int snd_cs4231_put_single(struct snd_kcontrol *kcontrol,
1476                                  struct snd_ctl_elem_value *ucontrol)
1477 {
1478         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1479         unsigned long flags;
1480         int reg = kcontrol->private_value & 0xff;
1481         int shift = (kcontrol->private_value >> 8) & 0xff;
1482         int mask = (kcontrol->private_value >> 16) & 0xff;
1483         int invert = (kcontrol->private_value >> 24) & 0xff;
1484         int change;
1485         unsigned short val;
1486         
1487         val = (ucontrol->value.integer.value[0] & mask);
1488         if (invert)
1489                 val = mask - val;
1490         val <<= shift;
1491
1492         spin_lock_irqsave(&chip->lock, flags);
1493
1494         val = (chip->image[reg] & ~(mask << shift)) | val;
1495         change = val != chip->image[reg];
1496         snd_cs4231_out(chip, reg, val);
1497
1498         spin_unlock_irqrestore(&chip->lock, flags);
1499
1500         return change;
1501 }
1502
1503 static int snd_cs4231_info_double(struct snd_kcontrol *kcontrol,
1504                                   struct snd_ctl_elem_info *uinfo)
1505 {
1506         int mask = (kcontrol->private_value >> 24) & 0xff;
1507
1508         uinfo->type = mask == 1 ?
1509                 SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1510         uinfo->count = 2;
1511         uinfo->value.integer.min = 0;
1512         uinfo->value.integer.max = mask;
1513
1514         return 0;
1515 }
1516
1517 static int snd_cs4231_get_double(struct snd_kcontrol *kcontrol,
1518                                  struct snd_ctl_elem_value *ucontrol)
1519 {
1520         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1521         unsigned long flags;
1522         int left_reg = kcontrol->private_value & 0xff;
1523         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1524         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1525         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1526         int mask = (kcontrol->private_value >> 24) & 0xff;
1527         int invert = (kcontrol->private_value >> 22) & 1;
1528         
1529         spin_lock_irqsave(&chip->lock, flags);
1530
1531         ucontrol->value.integer.value[0] = (chip->image[left_reg] >> shift_left) & mask;
1532         ucontrol->value.integer.value[1] = (chip->image[right_reg] >> shift_right) & mask;
1533
1534         spin_unlock_irqrestore(&chip->lock, flags);
1535
1536         if (invert) {
1537                 ucontrol->value.integer.value[0] =
1538                         (mask - ucontrol->value.integer.value[0]);
1539                 ucontrol->value.integer.value[1] =
1540                         (mask - ucontrol->value.integer.value[1]);
1541         }
1542
1543         return 0;
1544 }
1545
1546 static int snd_cs4231_put_double(struct snd_kcontrol *kcontrol,
1547                                  struct snd_ctl_elem_value *ucontrol)
1548 {
1549         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1550         unsigned long flags;
1551         int left_reg = kcontrol->private_value & 0xff;
1552         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1553         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1554         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1555         int mask = (kcontrol->private_value >> 24) & 0xff;
1556         int invert = (kcontrol->private_value >> 22) & 1;
1557         int change;
1558         unsigned short val1, val2;
1559         
1560         val1 = ucontrol->value.integer.value[0] & mask;
1561         val2 = ucontrol->value.integer.value[1] & mask;
1562         if (invert) {
1563                 val1 = mask - val1;
1564                 val2 = mask - val2;
1565         }
1566         val1 <<= shift_left;
1567         val2 <<= shift_right;
1568
1569         spin_lock_irqsave(&chip->lock, flags);
1570
1571         val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
1572         val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
1573         change = val1 != chip->image[left_reg] || val2 != chip->image[right_reg];
1574         snd_cs4231_out(chip, left_reg, val1);
1575         snd_cs4231_out(chip, right_reg, val2);
1576
1577         spin_unlock_irqrestore(&chip->lock, flags);
1578
1579         return change;
1580 }
1581
1582 #define CS4231_SINGLE(xname, xindex, reg, shift, mask, invert) \
1583 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1584   .info = snd_cs4231_info_single, \
1585   .get = snd_cs4231_get_single, .put = snd_cs4231_put_single, \
1586   .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }
1587
1588 #define CS4231_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
1589 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1590   .info = snd_cs4231_info_double, \
1591   .get = snd_cs4231_get_double, .put = snd_cs4231_put_double, \
1592   .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }
1593
1594 static struct snd_kcontrol_new snd_cs4231_controls[] __initdata = {
1595 CS4231_DOUBLE("PCM Playback Switch", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
1596 CS4231_DOUBLE("PCM Playback Volume", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),
1597 CS4231_DOUBLE("Line Playback Switch", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
1598 CS4231_DOUBLE("Line Playback Volume", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),
1599 CS4231_DOUBLE("Aux Playback Switch", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
1600 CS4231_DOUBLE("Aux Playback Volume", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),
1601 CS4231_DOUBLE("Aux Playback Switch", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
1602 CS4231_DOUBLE("Aux Playback Volume", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),
1603 CS4231_SINGLE("Mono Playback Switch", 0, CS4231_MONO_CTRL, 7, 1, 1),
1604 CS4231_SINGLE("Mono Playback Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),
1605 CS4231_SINGLE("Mono Output Playback Switch", 0, CS4231_MONO_CTRL, 6, 1, 1),
1606 CS4231_SINGLE("Mono Output Playback Bypass", 0, CS4231_MONO_CTRL, 5, 1, 0),
1607 CS4231_DOUBLE("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 0, 0, 15, 0),
1608 {
1609         .iface  = SNDRV_CTL_ELEM_IFACE_MIXER,
1610         .name   = "Capture Source",
1611         .info   = snd_cs4231_info_mux,
1612         .get    = snd_cs4231_get_mux,
1613         .put    = snd_cs4231_put_mux,
1614 },
1615 CS4231_DOUBLE("Mic Boost", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 5, 5, 1, 0),
1616 CS4231_SINGLE("Loopback Capture Switch", 0, CS4231_LOOPBACK, 0, 1, 0),
1617 CS4231_SINGLE("Loopback Capture Volume", 0, CS4231_LOOPBACK, 2, 63, 1),
1618 /* SPARC specific uses of XCTL{0,1} general purpose outputs.  */
1619 CS4231_SINGLE("Line Out Switch", 0, CS4231_PIN_CTRL, 6, 1, 1),
1620 CS4231_SINGLE("Headphone Out Switch", 0, CS4231_PIN_CTRL, 7, 1, 1)
1621 };
1622                                         
1623 static int __init snd_cs4231_mixer(struct snd_card *card)
1624 {
1625         struct snd_cs4231 *chip = card->private_data;
1626         int err, idx;
1627
1628         snd_assert(chip != NULL && chip->pcm != NULL, return -EINVAL);
1629
1630         strcpy(card->mixername, chip->pcm->name);
1631
1632         for (idx = 0; idx < ARRAY_SIZE(snd_cs4231_controls); idx++) {
1633                 err = snd_ctl_add(card,
1634                                  snd_ctl_new1(&snd_cs4231_controls[idx], chip));
1635                 if (err < 0)
1636                         return err;
1637         }
1638         return 0;
1639 }
1640
1641 static int dev;
1642
1643 static int __init cs4231_attach_begin(struct snd_card **rcard)
1644 {
1645         struct snd_card *card;
1646         struct snd_cs4231 *chip;
1647
1648         *rcard = NULL;
1649
1650         if (dev >= SNDRV_CARDS)
1651                 return -ENODEV;
1652
1653         if (!enable[dev]) {
1654                 dev++;
1655                 return -ENOENT;
1656         }
1657
1658         card = snd_card_new(index[dev], id[dev], THIS_MODULE,
1659                             sizeof(struct snd_cs4231));
1660         if (card == NULL)
1661                 return -ENOMEM;
1662
1663         strcpy(card->driver, "CS4231");
1664         strcpy(card->shortname, "Sun CS4231");
1665
1666         chip = card->private_data;
1667         chip->card = card;
1668
1669         *rcard = card;
1670         return 0;
1671 }
1672
1673 static int __init cs4231_attach_finish(struct snd_card *card)
1674 {
1675         struct snd_cs4231 *chip = card->private_data;
1676         int err;
1677
1678         err = snd_cs4231_pcm(card);
1679         if (err < 0)
1680                 goto out_err;
1681
1682         err = snd_cs4231_mixer(card);
1683         if (err < 0)
1684                 goto out_err;
1685
1686         err = snd_cs4231_timer(card);
1687         if (err < 0)
1688                 goto out_err;
1689
1690         err = snd_card_register(card);
1691         if (err < 0)
1692                 goto out_err;
1693
1694         chip->next = cs4231_list;
1695         cs4231_list = chip;
1696
1697         dev++;
1698         return 0;
1699
1700 out_err:
1701         snd_card_free(card);
1702         return err;
1703 }
1704
1705 #ifdef SBUS_SUPPORT
1706
1707 static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id)
1708 {
1709         unsigned long flags;
1710         unsigned char status;
1711         u32 csr;
1712         struct snd_cs4231 *chip = dev_id;
1713
1714         /*This is IRQ is not raised by the cs4231*/
1715         if (!(__cs4231_readb(chip, CS4231P(chip, STATUS)) & CS4231_GLOBALIRQ))
1716                 return IRQ_NONE;
1717
1718         /* ACK the APC interrupt. */
1719         csr = sbus_readl(chip->port + APCCSR);
1720
1721         sbus_writel(csr, chip->port + APCCSR);
1722
1723         if ((csr & APC_PDMA_READY) && 
1724             (csr & APC_PLAY_INT) &&
1725             (csr & APC_XINT_PNVA) &&
1726             !(csr & APC_XINT_EMPT))
1727                         snd_cs4231_play_callback(chip);
1728
1729         if ((csr & APC_CDMA_READY) && 
1730             (csr & APC_CAPT_INT) &&
1731             (csr & APC_XINT_CNVA) &&
1732             !(csr & APC_XINT_EMPT))
1733                         snd_cs4231_capture_callback(chip);
1734         
1735         status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);
1736
1737         if (status & CS4231_TIMER_IRQ) {
1738                 if (chip->timer)
1739                         snd_timer_interrupt(chip->timer, chip->timer->sticks);
1740         }               
1741
1742         if ((status & CS4231_RECORD_IRQ) && (csr & APC_CDMA_READY))
1743                 snd_cs4231_overrange(chip);
1744
1745         /* ACK the CS4231 interrupt. */
1746         spin_lock_irqsave(&chip->lock, flags);
1747         snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
1748         spin_unlock_irqrestore(&chip->lock, flags);
1749
1750         return IRQ_HANDLED;
1751 }
1752
1753 /*
1754  * SBUS DMA routines
1755  */
1756
1757 static int sbus_dma_request(struct cs4231_dma_control *dma_cont, dma_addr_t bus_addr, size_t len)
1758 {
1759         unsigned long flags;
1760         u32 test, csr;
1761         int err;
1762         struct sbus_dma_info *base = &dma_cont->sbus_info;
1763         
1764         if (len >= (1 << 24))
1765                 return -EINVAL;
1766         spin_lock_irqsave(&base->lock, flags);
1767         csr = sbus_readl(base->regs + APCCSR);
1768         err = -EINVAL;
1769         test = APC_CDMA_READY;
1770         if ( base->dir == APC_PLAY )
1771                 test = APC_PDMA_READY;
1772         if (!(csr & test))
1773                 goto out;
1774         err = -EBUSY;
1775         test = APC_XINT_CNVA;
1776         if ( base->dir == APC_PLAY )
1777                 test = APC_XINT_PNVA;
1778         if (!(csr & test))
1779                 goto out;
1780         err = 0;
1781         sbus_writel(bus_addr, base->regs + base->dir + APCNVA);
1782         sbus_writel(len, base->regs + base->dir + APCNC);
1783 out:
1784         spin_unlock_irqrestore(&base->lock, flags);
1785         return err;
1786 }
1787
1788 static void sbus_dma_prepare(struct cs4231_dma_control *dma_cont, int d)
1789 {
1790         unsigned long flags;
1791         u32 csr, test;
1792         struct sbus_dma_info *base = &dma_cont->sbus_info;
1793
1794         spin_lock_irqsave(&base->lock, flags);
1795         csr = sbus_readl(base->regs + APCCSR);
1796         test =  APC_GENL_INT | APC_PLAY_INT | APC_XINT_ENA |
1797                 APC_XINT_PLAY | APC_XINT_PEMP | APC_XINT_GENL |
1798                  APC_XINT_PENA;
1799         if ( base->dir == APC_RECORD )
1800                 test = APC_GENL_INT | APC_CAPT_INT | APC_XINT_ENA |
1801                         APC_XINT_CAPT | APC_XINT_CEMP | APC_XINT_GENL;
1802         csr |= test;
1803         sbus_writel(csr, base->regs + APCCSR);
1804         spin_unlock_irqrestore(&base->lock, flags);
1805 }
1806
1807 static void sbus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
1808 {
1809         unsigned long flags;
1810         u32 csr, shift;
1811         struct sbus_dma_info *base = &dma_cont->sbus_info;
1812
1813         spin_lock_irqsave(&base->lock, flags);
1814         if (!on) {
1815                 sbus_writel(0, base->regs + base->dir + APCNC);
1816                 sbus_writel(0, base->regs + base->dir + APCNVA);
1817                 if ( base->dir == APC_PLAY ) {
1818                         sbus_writel(0, base->regs + base->dir + APCC);
1819                         sbus_writel(0, base->regs + base->dir + APCVA);
1820                 }
1821
1822                 udelay(1200);
1823         } 
1824         csr = sbus_readl(base->regs + APCCSR);
1825         shift = 0;
1826         if ( base->dir == APC_PLAY )
1827                 shift = 1;
1828         if (on)
1829                 csr &= ~(APC_CPAUSE << shift);
1830         else
1831                 csr |= (APC_CPAUSE << shift); 
1832         sbus_writel(csr, base->regs + APCCSR);
1833         if (on)
1834                 csr |= (APC_CDMA_READY << shift);
1835         else
1836                 csr &= ~(APC_CDMA_READY << shift);
1837         sbus_writel(csr, base->regs + APCCSR);
1838         
1839         spin_unlock_irqrestore(&base->lock, flags);
1840 }
1841
1842 static unsigned int sbus_dma_addr(struct cs4231_dma_control *dma_cont)
1843 {
1844         struct sbus_dma_info *base = &dma_cont->sbus_info;
1845
1846         return sbus_readl(base->regs + base->dir + APCVA);
1847 }
1848
1849 static void sbus_dma_preallocate(struct snd_cs4231 *chip, struct snd_pcm *pcm)
1850 {
1851         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_SBUS,
1852                                               snd_dma_sbus_data(chip->dev_u.sdev),
1853                                               64*1024, 128*1024);
1854 }
1855
1856 /*
1857  * Init and exit routines
1858  */
1859
1860 static int snd_cs4231_sbus_free(struct snd_cs4231 *chip)
1861 {
1862         if (chip->irq[0])
1863                 free_irq(chip->irq[0], chip);
1864
1865         if (chip->port)
1866                 sbus_iounmap(chip->port, chip->regs_size);
1867
1868         kfree(chip);
1869
1870         return 0;
1871 }
1872
1873 static int snd_cs4231_sbus_dev_free(struct snd_device *device)
1874 {
1875         struct snd_cs4231 *cp = device->device_data;
1876
1877         return snd_cs4231_sbus_free(cp);
1878 }
1879
1880 static struct snd_device_ops snd_cs4231_sbus_dev_ops = {
1881         .dev_free       =       snd_cs4231_sbus_dev_free,
1882 };
1883
1884 static int __init snd_cs4231_sbus_create(struct snd_card *card,
1885                                          struct sbus_dev *sdev,
1886                                          int dev)
1887 {
1888         struct snd_cs4231 *chip = card->private_data;
1889         int err;
1890
1891         spin_lock_init(&chip->lock);
1892         spin_lock_init(&chip->c_dma.sbus_info.lock);
1893         spin_lock_init(&chip->p_dma.sbus_info.lock);
1894         mutex_init(&chip->mce_mutex);
1895         mutex_init(&chip->open_mutex);
1896         chip->dev_u.sdev = sdev;
1897         chip->regs_size = sdev->reg_addrs[0].reg_size;
1898         memcpy(&chip->image, &snd_cs4231_original_image,
1899                sizeof(snd_cs4231_original_image));
1900
1901         chip->port = sbus_ioremap(&sdev->resource[0], 0,
1902                                   chip->regs_size, "cs4231");
1903         if (!chip->port) {
1904                 snd_printdd("cs4231-%d: Unable to map chip registers.\n", dev);
1905                 return -EIO;
1906         }
1907
1908         chip->c_dma.sbus_info.regs = chip->port;
1909         chip->p_dma.sbus_info.regs = chip->port;
1910         chip->c_dma.sbus_info.dir = APC_RECORD;
1911         chip->p_dma.sbus_info.dir = APC_PLAY;
1912
1913         chip->p_dma.prepare = sbus_dma_prepare;
1914         chip->p_dma.enable = sbus_dma_enable;
1915         chip->p_dma.request = sbus_dma_request;
1916         chip->p_dma.address = sbus_dma_addr;
1917         chip->p_dma.preallocate = sbus_dma_preallocate;
1918
1919         chip->c_dma.prepare = sbus_dma_prepare;
1920         chip->c_dma.enable = sbus_dma_enable;
1921         chip->c_dma.request = sbus_dma_request;
1922         chip->c_dma.address = sbus_dma_addr;
1923         chip->c_dma.preallocate = sbus_dma_preallocate;
1924
1925         if (request_irq(sdev->irqs[0], snd_cs4231_sbus_interrupt,
1926                         IRQF_SHARED, "cs4231", chip)) {
1927                 snd_printdd("cs4231-%d: Unable to grab SBUS IRQ %d\n",
1928                             dev, sdev->irqs[0]);
1929                 snd_cs4231_sbus_free(chip);
1930                 return -EBUSY;
1931         }
1932         chip->irq[0] = sdev->irqs[0];
1933
1934         if (snd_cs4231_probe(chip) < 0) {
1935                 snd_cs4231_sbus_free(chip);
1936                 return -ENODEV;
1937         }
1938         snd_cs4231_init(chip);
1939
1940         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
1941                                   chip, &snd_cs4231_sbus_dev_ops)) < 0) {
1942                 snd_cs4231_sbus_free(chip);
1943                 return err;
1944         }
1945
1946         return 0;
1947 }
1948
1949 static int __init cs4231_sbus_attach(struct sbus_dev *sdev)
1950 {
1951         struct resource *rp = &sdev->resource[0];
1952         struct snd_card *card;
1953         int err;
1954
1955         err = cs4231_attach_begin(&card);
1956         if (err)
1957                 return err;
1958
1959         sprintf(card->longname, "%s at 0x%02lx:0x%016Lx, irq %d",
1960                 card->shortname,
1961                 rp->flags & 0xffL,
1962                 (unsigned long long)rp->start,
1963                 sdev->irqs[0]);
1964
1965         err = snd_cs4231_sbus_create(card, sdev, dev);
1966         if (err < 0) {
1967                 snd_card_free(card);
1968                 return err;
1969         }
1970
1971         return cs4231_attach_finish(card);
1972 }
1973 #endif
1974
1975 #ifdef EBUS_SUPPORT
1976
1977 static void snd_cs4231_ebus_play_callback(struct ebus_dma_info *p, int event, void *cookie)
1978 {
1979         struct snd_cs4231 *chip = cookie;
1980         
1981         snd_cs4231_play_callback(chip);
1982 }
1983
1984 static void snd_cs4231_ebus_capture_callback(struct ebus_dma_info *p, int event, void *cookie)
1985 {
1986         struct snd_cs4231 *chip = cookie;
1987
1988         snd_cs4231_capture_callback(chip);
1989 }
1990
1991 /*
1992  * EBUS DMA wrappers
1993  */
1994
1995 static int _ebus_dma_request(struct cs4231_dma_control *dma_cont, dma_addr_t bus_addr, size_t len)
1996 {
1997         return ebus_dma_request(&dma_cont->ebus_info, bus_addr, len);
1998 }
1999
2000 static void _ebus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
2001 {
2002         ebus_dma_enable(&dma_cont->ebus_info, on);
2003 }
2004
2005 static void _ebus_dma_prepare(struct cs4231_dma_control *dma_cont, int dir)
2006 {
2007         ebus_dma_prepare(&dma_cont->ebus_info, dir);
2008 }
2009
2010 static unsigned int _ebus_dma_addr(struct cs4231_dma_control *dma_cont)
2011 {
2012         return ebus_dma_addr(&dma_cont->ebus_info);
2013 }
2014
2015 static void _ebus_dma_preallocate(struct snd_cs4231 *chip, struct snd_pcm *pcm)
2016 {
2017         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
2018                                       snd_dma_pci_data(chip->dev_u.pdev),
2019                                       64*1024, 128*1024);
2020 }
2021
2022 /*
2023  * Init and exit routines
2024  */
2025
2026 static int snd_cs4231_ebus_free(struct snd_cs4231 *chip)
2027 {
2028         if (chip->c_dma.ebus_info.regs) {
2029                 ebus_dma_unregister(&chip->c_dma.ebus_info);
2030                 iounmap(chip->c_dma.ebus_info.regs);
2031         }
2032         if (chip->p_dma.ebus_info.regs) {
2033                 ebus_dma_unregister(&chip->p_dma.ebus_info);
2034                 iounmap(chip->p_dma.ebus_info.regs);
2035         }
2036
2037         if (chip->port)
2038                 iounmap(chip->port);
2039
2040         kfree(chip);
2041
2042         return 0;
2043 }
2044
2045 static int snd_cs4231_ebus_dev_free(struct snd_device *device)
2046 {
2047         struct snd_cs4231 *cp = device->device_data;
2048
2049         return snd_cs4231_ebus_free(cp);
2050 }
2051
2052 static struct snd_device_ops snd_cs4231_ebus_dev_ops = {
2053         .dev_free       =       snd_cs4231_ebus_dev_free,
2054 };
2055
2056 static int __init snd_cs4231_ebus_create(struct snd_card *card,
2057                                          struct linux_ebus_device *edev,
2058                                          int dev)
2059 {
2060         struct snd_cs4231 *chip = card->private_data;
2061         int err;
2062
2063         spin_lock_init(&chip->lock);
2064         spin_lock_init(&chip->c_dma.ebus_info.lock);
2065         spin_lock_init(&chip->p_dma.ebus_info.lock);
2066         mutex_init(&chip->mce_mutex);
2067         mutex_init(&chip->open_mutex);
2068         chip->flags |= CS4231_FLAG_EBUS;
2069         chip->dev_u.pdev = edev->bus->self;
2070         memcpy(&chip->image, &snd_cs4231_original_image,
2071                sizeof(snd_cs4231_original_image));
2072         strcpy(chip->c_dma.ebus_info.name, "cs4231(capture)");
2073         chip->c_dma.ebus_info.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
2074         chip->c_dma.ebus_info.callback = snd_cs4231_ebus_capture_callback;
2075         chip->c_dma.ebus_info.client_cookie = chip;
2076         chip->c_dma.ebus_info.irq = edev->irqs[0];
2077         strcpy(chip->p_dma.ebus_info.name, "cs4231(play)");
2078         chip->p_dma.ebus_info.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
2079         chip->p_dma.ebus_info.callback = snd_cs4231_ebus_play_callback;
2080         chip->p_dma.ebus_info.client_cookie = chip;
2081         chip->p_dma.ebus_info.irq = edev->irqs[1];
2082
2083         chip->p_dma.prepare = _ebus_dma_prepare;
2084         chip->p_dma.enable = _ebus_dma_enable;
2085         chip->p_dma.request = _ebus_dma_request;
2086         chip->p_dma.address = _ebus_dma_addr;
2087         chip->p_dma.preallocate = _ebus_dma_preallocate;
2088
2089         chip->c_dma.prepare = _ebus_dma_prepare;
2090         chip->c_dma.enable = _ebus_dma_enable;
2091         chip->c_dma.request = _ebus_dma_request;
2092         chip->c_dma.address = _ebus_dma_addr;
2093         chip->c_dma.preallocate = _ebus_dma_preallocate;
2094
2095         chip->port = ioremap(edev->resource[0].start, 0x10);
2096         chip->p_dma.ebus_info.regs = ioremap(edev->resource[1].start, 0x10);
2097         chip->c_dma.ebus_info.regs = ioremap(edev->resource[2].start, 0x10);
2098         if (!chip->port || !chip->p_dma.ebus_info.regs || !chip->c_dma.ebus_info.regs) {
2099                 snd_cs4231_ebus_free(chip);
2100                 snd_printdd("cs4231-%d: Unable to map chip registers.\n", dev);
2101                 return -EIO;
2102         }
2103
2104         if (ebus_dma_register(&chip->c_dma.ebus_info)) {
2105                 snd_cs4231_ebus_free(chip);
2106                 snd_printdd("cs4231-%d: Unable to register EBUS capture DMA\n", dev);
2107                 return -EBUSY;
2108         }
2109         if (ebus_dma_irq_enable(&chip->c_dma.ebus_info, 1)) {
2110                 snd_cs4231_ebus_free(chip);
2111                 snd_printdd("cs4231-%d: Unable to enable EBUS capture IRQ\n", dev);
2112                 return -EBUSY;
2113         }
2114
2115         if (ebus_dma_register(&chip->p_dma.ebus_info)) {
2116                 snd_cs4231_ebus_free(chip);
2117                 snd_printdd("cs4231-%d: Unable to register EBUS play DMA\n", dev);
2118                 return -EBUSY;
2119         }
2120         if (ebus_dma_irq_enable(&chip->p_dma.ebus_info, 1)) {
2121                 snd_cs4231_ebus_free(chip);
2122                 snd_printdd("cs4231-%d: Unable to enable EBUS play IRQ\n", dev);
2123                 return -EBUSY;
2124         }
2125
2126         if (snd_cs4231_probe(chip) < 0) {
2127                 snd_cs4231_ebus_free(chip);
2128                 return -ENODEV;
2129         }
2130         snd_cs4231_init(chip);
2131
2132         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
2133                                   chip, &snd_cs4231_ebus_dev_ops)) < 0) {
2134                 snd_cs4231_ebus_free(chip);
2135                 return err;
2136         }
2137
2138         return 0;
2139 }
2140
2141 static int __init cs4231_ebus_attach(struct linux_ebus_device *edev)
2142 {
2143         struct snd_card *card;
2144         int err;
2145
2146         err = cs4231_attach_begin(&card);
2147         if (err)
2148                 return err;
2149
2150         sprintf(card->longname, "%s at 0x%lx, irq %d",
2151                 card->shortname,
2152                 edev->resource[0].start,
2153                 edev->irqs[0]);
2154
2155         err = snd_cs4231_ebus_create(card, edev, dev);
2156         if (err < 0) {
2157                 snd_card_free(card);
2158                 return err;
2159         }
2160
2161         return cs4231_attach_finish(card);
2162 }
2163 #endif
2164
2165 static int __init cs4231_init(void)
2166 {
2167 #ifdef SBUS_SUPPORT
2168         struct sbus_bus *sbus;
2169         struct sbus_dev *sdev;
2170 #endif
2171 #ifdef EBUS_SUPPORT
2172         struct linux_ebus *ebus;
2173         struct linux_ebus_device *edev;
2174 #endif
2175         int found;
2176
2177         found = 0;
2178
2179 #ifdef SBUS_SUPPORT
2180         for_all_sbusdev(sdev, sbus) {
2181                 if (!strcmp(sdev->prom_name, "SUNW,CS4231")) {
2182                         if (cs4231_sbus_attach(sdev) == 0)
2183                                 found++;
2184                 }
2185         }
2186 #endif
2187 #ifdef EBUS_SUPPORT
2188         for_each_ebus(ebus) {
2189                 for_each_ebusdev(edev, ebus) {
2190                         int match = 0;
2191
2192                         if (!strcmp(edev->prom_node->name, "SUNW,CS4231")) {
2193                                 match = 1;
2194                         } else if (!strcmp(edev->prom_node->name, "audio")) {
2195                                 const char *compat;
2196
2197                                 compat = of_get_property(edev->prom_node,
2198                                                          "compatible", NULL);
2199                                 if (compat && !strcmp(compat, "SUNW,CS4231"))
2200                                         match = 1;
2201                         }
2202
2203                         if (match &&
2204                             cs4231_ebus_attach(edev) == 0)
2205                                 found++;
2206                 }
2207         }
2208 #endif
2209
2210
2211         return (found > 0) ? 0 : -EIO;
2212 }
2213
2214 static void __exit cs4231_exit(void)
2215 {
2216         struct snd_cs4231 *p = cs4231_list;
2217
2218         while (p != NULL) {
2219                 struct snd_cs4231 *next = p->next;
2220
2221                 snd_card_free(p->card);
2222
2223                 p = next;
2224         }
2225
2226         cs4231_list = NULL;
2227 }
2228
2229 module_init(cs4231_init);
2230 module_exit(cs4231_exit);