Version:  2.0.40 2.2.26 2.4.37 3.0 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

Linux/sound/sparc/cs4231.c

  1 /*
  2  * Driver for CS4231 sound chips found on Sparcs.
  3  * Copyright (C) 2002, 2008 David S. Miller <davem@davemloft.net>
  4  *
  5  * Based entirely upon drivers/sbus/audio/cs4231.c which is:
  6  * Copyright (C) 1996, 1997, 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@perex.cz>
  9  */
 10 
 11 #include <linux/module.h>
 12 #include <linux/kernel.h>
 13 #include <linux/delay.h>
 14 #include <linux/init.h>
 15 #include <linux/interrupt.h>
 16 #include <linux/moduleparam.h>
 17 #include <linux/irq.h>
 18 #include <linux/io.h>
 19 #include <linux/of.h>
 20 #include <linux/of_device.h>
 21 
 22 #include <sound/core.h>
 23 #include <sound/pcm.h>
 24 #include <sound/info.h>
 25 #include <sound/control.h>
 26 #include <sound/timer.h>
 27 #include <sound/initval.h>
 28 #include <sound/pcm_params.h>
 29 
 30 #ifdef CONFIG_SBUS
 31 #define SBUS_SUPPORT
 32 #endif
 33 
 34 #if defined(CONFIG_PCI) && defined(CONFIG_SPARC64)
 35 #define EBUS_SUPPORT
 36 #include <linux/pci.h>
 37 #include <asm/ebus_dma.h>
 38 #endif
 39 
 40 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 41 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 42 /* Enable this card */
 43 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 44 
 45 module_param_array(index, int, NULL, 0444);
 46 MODULE_PARM_DESC(index, "Index value for Sun CS4231 soundcard.");
 47 module_param_array(id, charp, NULL, 0444);
 48 MODULE_PARM_DESC(id, "ID string for Sun CS4231 soundcard.");
 49 module_param_array(enable, bool, NULL, 0444);
 50 MODULE_PARM_DESC(enable, "Enable Sun CS4231 soundcard.");
 51 MODULE_AUTHOR("Jaroslav Kysela, Derrick J. Brashear and David S. Miller");
 52 MODULE_DESCRIPTION("Sun CS4231");
 53 MODULE_LICENSE("GPL");
 54 MODULE_SUPPORTED_DEVICE("{{Sun,CS4231}}");
 55 
 56 #ifdef SBUS_SUPPORT
 57 struct sbus_dma_info {
 58        spinlock_t       lock;   /* DMA access lock */
 59        int              dir;
 60        void __iomem     *regs;
 61 };
 62 #endif
 63 
 64 struct snd_cs4231;
 65 struct cs4231_dma_control {
 66         void            (*prepare)(struct cs4231_dma_control *dma_cont,
 67                                    int dir);
 68         void            (*enable)(struct cs4231_dma_control *dma_cont, int on);
 69         int             (*request)(struct cs4231_dma_control *dma_cont,
 70                                    dma_addr_t bus_addr, size_t len);
 71         unsigned int    (*address)(struct cs4231_dma_control *dma_cont);
 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;   /* registers access 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 | \
106                                  CS4231_MODE_TIMER)
107 
108         unsigned char           image[32];      /* registers image */
109         int                     mce_bit;
110         int                     calibrate_mute;
111         struct mutex            mce_mutex;      /* mutex for mce register */
112         struct mutex            open_mutex;     /* mutex for ALSA open/close */
113 
114         struct platform_device  *op;
115         unsigned int            irq[2];
116         unsigned int            regs_size;
117         struct snd_cs4231       *next;
118 };
119 
120 /* Eventually we can use sound/isa/cs423x/cs4231_lib.c directly, but for
121  * now....  -DaveM
122  */
123 
124 /* IO ports */
125 #include <sound/cs4231-regs.h>
126 
127 /* XXX offsets are different than PC ISA chips... */
128 #define CS4231U(chip, x)        ((chip)->port + ((c_d_c_CS4231##x) << 2))
129 
130 /* SBUS DMA register defines.  */
131 
132 #define APCCSR  0x10UL  /* APC DMA CSR */
133 #define APCCVA  0x20UL  /* APC Capture DMA Address */
134 #define APCCC   0x24UL  /* APC Capture Count */
135 #define APCCNVA 0x28UL  /* APC Capture DMA Next Address */
136 #define APCCNC  0x2cUL  /* APC Capture Next Count */
137 #define APCPVA  0x30UL  /* APC Play DMA Address */
138 #define APCPC   0x34UL  /* APC Play Count */
139 #define APCPNVA 0x38UL  /* APC Play DMA Next Address */
140 #define APCPNC  0x3cUL  /* APC Play Next Count */
141 
142 /* Defines for SBUS DMA-routines */
143 
144 #define APCVA  0x0UL    /* APC DMA Address */
145 #define APCC   0x4UL    /* APC Count */
146 #define APCNVA 0x8UL    /* APC DMA Next Address */
147 #define APCNC  0xcUL    /* APC Next Count */
148 #define APC_PLAY 0x30UL /* Play registers start at 0x30 */
149 #define APC_RECORD 0x20UL /* Record registers start at 0x20 */
150 
151 /* APCCSR bits */
152 
153 #define APC_INT_PENDING 0x800000 /* Interrupt Pending */
154 #define APC_PLAY_INT    0x400000 /* Playback interrupt */
155 #define APC_CAPT_INT    0x200000 /* Capture interrupt */
156 #define APC_GENL_INT    0x100000 /* General interrupt */
157 #define APC_XINT_ENA    0x80000  /* General ext int. enable */
158 #define APC_XINT_PLAY   0x40000  /* Playback ext intr */
159 #define APC_XINT_CAPT   0x20000  /* Capture ext intr */
160 #define APC_XINT_GENL   0x10000  /* Error ext intr */
161 #define APC_XINT_EMPT   0x8000   /* Pipe empty interrupt (0 write to pva) */
162 #define APC_XINT_PEMP   0x4000   /* Play pipe empty (pva and pnva not set) */
163 #define APC_XINT_PNVA   0x2000   /* Playback NVA dirty */
164 #define APC_XINT_PENA   0x1000   /* play pipe empty Int enable */
165 #define APC_XINT_COVF   0x800    /* Cap data dropped on floor */
166 #define APC_XINT_CNVA   0x400    /* Capture NVA dirty */
167 #define APC_XINT_CEMP   0x200    /* Capture pipe empty (cva and cnva not set) */
168 #define APC_XINT_CENA   0x100    /* Cap. pipe empty int enable */
169 #define APC_PPAUSE      0x80     /* Pause the play DMA */
170 #define APC_CPAUSE      0x40     /* Pause the capture DMA */
171 #define APC_CDC_RESET   0x20     /* CODEC RESET */
172 #define APC_PDMA_READY  0x08     /* Play DMA Go */
173 #define APC_CDMA_READY  0x04     /* Capture DMA Go */
174 #define APC_CHIP_RESET  0x01     /* Reset the chip */
175 
176 /* EBUS DMA register offsets  */
177 
178 #define EBDMA_CSR       0x00UL  /* Control/Status */
179 #define EBDMA_ADDR      0x04UL  /* DMA Address */
180 #define EBDMA_COUNT     0x08UL  /* DMA Count */
181 
182 /*
183  *  Some variables
184  */
185 
186 static unsigned char freq_bits[14] = {
187         /* 5510 */      0x00 | CS4231_XTAL2,
188         /* 6620 */      0x0E | CS4231_XTAL2,
189         /* 8000 */      0x00 | CS4231_XTAL1,
190         /* 9600 */      0x0E | CS4231_XTAL1,
191         /* 11025 */     0x02 | CS4231_XTAL2,
192         /* 16000 */     0x02 | CS4231_XTAL1,
193         /* 18900 */     0x04 | CS4231_XTAL2,
194         /* 22050 */     0x06 | CS4231_XTAL2,
195         /* 27042 */     0x04 | CS4231_XTAL1,
196         /* 32000 */     0x06 | CS4231_XTAL1,
197         /* 33075 */     0x0C | CS4231_XTAL2,
198         /* 37800 */     0x08 | CS4231_XTAL2,
199         /* 44100 */     0x0A | CS4231_XTAL2,
200         /* 48000 */     0x0C | CS4231_XTAL1
201 };
202 
203 static unsigned int rates[14] = {
204         5510, 6620, 8000, 9600, 11025, 16000, 18900, 22050,
205         27042, 32000, 33075, 37800, 44100, 48000
206 };
207 
208 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
209         .count  = ARRAY_SIZE(rates),
210         .list   = rates,
211 };
212 
213 static int snd_cs4231_xrate(struct snd_pcm_runtime *runtime)
214 {
215         return snd_pcm_hw_constraint_list(runtime, 0,
216                                           SNDRV_PCM_HW_PARAM_RATE,
217                                           &hw_constraints_rates);
218 }
219 
220 static unsigned char snd_cs4231_original_image[32] =
221 {
222         0x00,                   /* 00/00 - lic */
223         0x00,                   /* 01/01 - ric */
224         0x9f,                   /* 02/02 - la1ic */
225         0x9f,                   /* 03/03 - ra1ic */
226         0x9f,                   /* 04/04 - la2ic */
227         0x9f,                   /* 05/05 - ra2ic */
228         0xbf,                   /* 06/06 - loc */
229         0xbf,                   /* 07/07 - roc */
230         0x20,                   /* 08/08 - pdfr */
231         CS4231_AUTOCALIB,       /* 09/09 - ic */
232         0x00,                   /* 0a/10 - pc */
233         0x00,                   /* 0b/11 - ti */
234         CS4231_MODE2,           /* 0c/12 - mi */
235         0x00,                   /* 0d/13 - lbc */
236         0x00,                   /* 0e/14 - pbru */
237         0x00,                   /* 0f/15 - pbrl */
238         0x80,                   /* 10/16 - afei */
239         0x01,                   /* 11/17 - afeii */
240         0x9f,                   /* 12/18 - llic */
241         0x9f,                   /* 13/19 - rlic */
242         0x00,                   /* 14/20 - tlb */
243         0x00,                   /* 15/21 - thb */
244         0x00,                   /* 16/22 - la3mic/reserved */
245         0x00,                   /* 17/23 - ra3mic/reserved */
246         0x00,                   /* 18/24 - afs */
247         0x00,                   /* 19/25 - lamoc/version */
248         0x00,                   /* 1a/26 - mioc */
249         0x00,                   /* 1b/27 - ramoc/reserved */
250         0x20,                   /* 1c/28 - cdfr */
251         0x00,                   /* 1d/29 - res4 */
252         0x00,                   /* 1e/30 - cbru */
253         0x00,                   /* 1f/31 - cbrl */
254 };
255 
256 static u8 __cs4231_readb(struct snd_cs4231 *cp, void __iomem *reg_addr)
257 {
258         if (cp->flags & CS4231_FLAG_EBUS)
259                 return readb(reg_addr);
260         else
261                 return sbus_readb(reg_addr);
262 }
263 
264 static void __cs4231_writeb(struct snd_cs4231 *cp, u8 val,
265                             void __iomem *reg_addr)
266 {
267         if (cp->flags & CS4231_FLAG_EBUS)
268                 return writeb(val, reg_addr);
269         else
270                 return sbus_writeb(val, reg_addr);
271 }
272 
273 /*
274  *  Basic I/O functions
275  */
276 
277 static void snd_cs4231_ready(struct snd_cs4231 *chip)
278 {
279         int timeout;
280 
281         for (timeout = 250; timeout > 0; timeout--) {
282                 int val = __cs4231_readb(chip, CS4231U(chip, REGSEL));
283                 if ((val & CS4231_INIT) == 0)
284                         break;
285                 udelay(100);
286         }
287 }
288 
289 static void snd_cs4231_dout(struct snd_cs4231 *chip, unsigned char reg,
290                             unsigned char value)
291 {
292         snd_cs4231_ready(chip);
293 #ifdef CONFIG_SND_DEBUG
294         if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
295                 snd_printdd("out: auto calibration time out - reg = 0x%x, "
296                             "value = 0x%x\n",
297                             reg, value);
298 #endif
299         __cs4231_writeb(chip, chip->mce_bit | reg, CS4231U(chip, REGSEL));
300         wmb();
301         __cs4231_writeb(chip, value, CS4231U(chip, REG));
302         mb();
303 }
304 
305 static inline void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
306                      unsigned char mask, unsigned char value)
307 {
308         unsigned char tmp = (chip->image[reg] & mask) | value;
309 
310         chip->image[reg] = tmp;
311         if (!chip->calibrate_mute)
312                 snd_cs4231_dout(chip, reg, tmp);
313 }
314 
315 static void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg,
316                            unsigned char value)
317 {
318         snd_cs4231_dout(chip, reg, value);
319         chip->image[reg] = value;
320         mb();
321 }
322 
323 static unsigned char snd_cs4231_in(struct snd_cs4231 *chip, unsigned char reg)
324 {
325         snd_cs4231_ready(chip);
326 #ifdef CONFIG_SND_DEBUG
327         if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
328                 snd_printdd("in: auto calibration time out - reg = 0x%x\n",
329                             reg);
330 #endif
331         __cs4231_writeb(chip, chip->mce_bit | reg, CS4231U(chip, REGSEL));
332         mb();
333         return __cs4231_readb(chip, CS4231U(chip, REG));
334 }
335 
336 /*
337  *  CS4231 detection / MCE routines
338  */
339 
340 static void snd_cs4231_busy_wait(struct snd_cs4231 *chip)
341 {
342         int timeout;
343 
344         /* looks like this sequence is proper for CS4231A chip (GUS MAX) */
345         for (timeout = 5; timeout > 0; timeout--)
346                 __cs4231_readb(chip, CS4231U(chip, REGSEL));
347 
348         /* end of cleanup sequence */
349         for (timeout = 500; timeout > 0; timeout--) {
350                 int val = __cs4231_readb(chip, CS4231U(chip, REGSEL));
351                 if ((val & CS4231_INIT) == 0)
352                         break;
353                 msleep(1);
354         }
355 }
356 
357 static void snd_cs4231_mce_up(struct snd_cs4231 *chip)
358 {
359         unsigned long flags;
360         int timeout;
361 
362         spin_lock_irqsave(&chip->lock, flags);
363         snd_cs4231_ready(chip);
364 #ifdef CONFIG_SND_DEBUG
365         if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
366                 snd_printdd("mce_up - auto calibration time out (0)\n");
367 #endif
368         chip->mce_bit |= CS4231_MCE;
369         timeout = __cs4231_readb(chip, CS4231U(chip, REGSEL));
370         if (timeout == 0x80)
371                 snd_printdd("mce_up [%p]: serious init problem - "
372                             "codec still busy\n",
373                             chip->port);
374         if (!(timeout & CS4231_MCE))
375                 __cs4231_writeb(chip, chip->mce_bit | (timeout & 0x1f),
376                                 CS4231U(chip, REGSEL));
377         spin_unlock_irqrestore(&chip->lock, flags);
378 }
379 
380 static void snd_cs4231_mce_down(struct snd_cs4231 *chip)
381 {
382         unsigned long flags, timeout;
383         int reg;
384 
385         snd_cs4231_busy_wait(chip);
386         spin_lock_irqsave(&chip->lock, flags);
387 #ifdef CONFIG_SND_DEBUG
388         if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
389                 snd_printdd("mce_down [%p] - auto calibration time out (0)\n",
390                             CS4231U(chip, REGSEL));
391 #endif
392         chip->mce_bit &= ~CS4231_MCE;
393         reg = __cs4231_readb(chip, CS4231U(chip, REGSEL));
394         __cs4231_writeb(chip, chip->mce_bit | (reg & 0x1f),
395                         CS4231U(chip, REGSEL));
396         if (reg == 0x80)
397                 snd_printdd("mce_down [%p]: serious init problem "
398                             "- codec still busy\n", chip->port);
399         if ((reg & CS4231_MCE) == 0) {
400                 spin_unlock_irqrestore(&chip->lock, flags);
401                 return;
402         }
403 
404         /*
405          * Wait for auto-calibration (AC) process to finish, i.e. ACI to go low.
406          */
407         timeout = jiffies + msecs_to_jiffies(250);
408         do {
409                 spin_unlock_irqrestore(&chip->lock, flags);
410                 msleep(1);
411                 spin_lock_irqsave(&chip->lock, flags);
412                 reg = snd_cs4231_in(chip, CS4231_TEST_INIT);
413                 reg &= CS4231_CALIB_IN_PROGRESS;
414         } while (reg && time_before(jiffies, timeout));
415         spin_unlock_irqrestore(&chip->lock, flags);
416 
417         if (reg)
418                 snd_printk(KERN_ERR
419                            "mce_down - auto calibration time out (2)\n");
420 }
421 
422 static void snd_cs4231_advance_dma(struct cs4231_dma_control *dma_cont,
423                                    struct snd_pcm_substream *substream,
424                                    unsigned int *periods_sent)
425 {
426         struct snd_pcm_runtime *runtime = substream->runtime;
427 
428         while (1) {
429                 unsigned int period_size = snd_pcm_lib_period_bytes(substream);
430                 unsigned int offset = period_size * (*periods_sent);
431 
432                 if (WARN_ON(period_size >= (1 << 24)))
433                         return;
434 
435                 if (dma_cont->request(dma_cont,
436                                       runtime->dma_addr + offset, period_size))
437                         return;
438                 (*periods_sent) = ((*periods_sent) + 1) % runtime->periods;
439         }
440 }
441 
442 static void cs4231_dma_trigger(struct snd_pcm_substream *substream,
443                                unsigned int what, int on)
444 {
445         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
446         struct cs4231_dma_control *dma_cont;
447 
448         if (what & CS4231_PLAYBACK_ENABLE) {
449                 dma_cont = &chip->p_dma;
450                 if (on) {
451                         dma_cont->prepare(dma_cont, 0);
452                         dma_cont->enable(dma_cont, 1);
453                         snd_cs4231_advance_dma(dma_cont,
454                                 chip->playback_substream,
455                                 &chip->p_periods_sent);
456                 } else {
457                         dma_cont->enable(dma_cont, 0);
458                 }
459         }
460         if (what & CS4231_RECORD_ENABLE) {
461                 dma_cont = &chip->c_dma;
462                 if (on) {
463                         dma_cont->prepare(dma_cont, 1);
464                         dma_cont->enable(dma_cont, 1);
465                         snd_cs4231_advance_dma(dma_cont,
466                                 chip->capture_substream,
467                                 &chip->c_periods_sent);
468                 } else {
469                         dma_cont->enable(dma_cont, 0);
470                 }
471         }
472 }
473 
474 static int snd_cs4231_trigger(struct snd_pcm_substream *substream, int cmd)
475 {
476         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
477         int result = 0;
478 
479         switch (cmd) {
480         case SNDRV_PCM_TRIGGER_START:
481         case SNDRV_PCM_TRIGGER_STOP:
482         {
483                 unsigned int what = 0;
484                 struct snd_pcm_substream *s;
485                 unsigned long flags;
486 
487                 snd_pcm_group_for_each_entry(s, substream) {
488                         if (s == chip->playback_substream) {
489                                 what |= CS4231_PLAYBACK_ENABLE;
490                                 snd_pcm_trigger_done(s, substream);
491                         } else if (s == chip->capture_substream) {
492                                 what |= CS4231_RECORD_ENABLE;
493                                 snd_pcm_trigger_done(s, substream);
494                         }
495                 }
496 
497                 spin_lock_irqsave(&chip->lock, flags);
498                 if (cmd == SNDRV_PCM_TRIGGER_START) {
499                         cs4231_dma_trigger(substream, what, 1);
500                         chip->image[CS4231_IFACE_CTRL] |= what;
501                 } else {
502                         cs4231_dma_trigger(substream, what, 0);
503                         chip->image[CS4231_IFACE_CTRL] &= ~what;
504                 }
505                 snd_cs4231_out(chip, CS4231_IFACE_CTRL,
506                                chip->image[CS4231_IFACE_CTRL]);
507                 spin_unlock_irqrestore(&chip->lock, flags);
508                 break;
509         }
510         default:
511                 result = -EINVAL;
512                 break;
513         }
514 
515         return result;
516 }
517 
518 /*
519  *  CODEC I/O
520  */
521 
522 static unsigned char snd_cs4231_get_rate(unsigned int rate)
523 {
524         int i;
525 
526         for (i = 0; i < 14; i++)
527                 if (rate == rates[i])
528                         return freq_bits[i];
529 
530         return freq_bits[13];
531 }
532 
533 static unsigned char snd_cs4231_get_format(struct snd_cs4231 *chip, int format,
534                                            int channels)
535 {
536         unsigned char rformat;
537 
538         rformat = CS4231_LINEAR_8;
539         switch (format) {
540         case SNDRV_PCM_FORMAT_MU_LAW:
541                 rformat = CS4231_ULAW_8;
542                 break;
543         case SNDRV_PCM_FORMAT_A_LAW:
544                 rformat = CS4231_ALAW_8;
545                 break;
546         case SNDRV_PCM_FORMAT_S16_LE:
547                 rformat = CS4231_LINEAR_16;
548                 break;
549         case SNDRV_PCM_FORMAT_S16_BE:
550                 rformat = CS4231_LINEAR_16_BIG;
551                 break;
552         case SNDRV_PCM_FORMAT_IMA_ADPCM:
553                 rformat = CS4231_ADPCM_16;
554                 break;
555         }
556         if (channels > 1)
557                 rformat |= CS4231_STEREO;
558         return rformat;
559 }
560 
561 static void snd_cs4231_calibrate_mute(struct snd_cs4231 *chip, int mute)
562 {
563         unsigned long flags;
564 
565         mute = mute ? 1 : 0;
566         spin_lock_irqsave(&chip->lock, flags);
567         if (chip->calibrate_mute == mute) {
568                 spin_unlock_irqrestore(&chip->lock, flags);
569                 return;
570         }
571         if (!mute) {
572                 snd_cs4231_dout(chip, CS4231_LEFT_INPUT,
573                                 chip->image[CS4231_LEFT_INPUT]);
574                 snd_cs4231_dout(chip, CS4231_RIGHT_INPUT,
575                                 chip->image[CS4231_RIGHT_INPUT]);
576                 snd_cs4231_dout(chip, CS4231_LOOPBACK,
577                                 chip->image[CS4231_LOOPBACK]);
578         }
579         snd_cs4231_dout(chip, CS4231_AUX1_LEFT_INPUT,
580                         mute ? 0x80 : chip->image[CS4231_AUX1_LEFT_INPUT]);
581         snd_cs4231_dout(chip, CS4231_AUX1_RIGHT_INPUT,
582                         mute ? 0x80 : chip->image[CS4231_AUX1_RIGHT_INPUT]);
583         snd_cs4231_dout(chip, CS4231_AUX2_LEFT_INPUT,
584                         mute ? 0x80 : chip->image[CS4231_AUX2_LEFT_INPUT]);
585         snd_cs4231_dout(chip, CS4231_AUX2_RIGHT_INPUT,
586                         mute ? 0x80 : chip->image[CS4231_AUX2_RIGHT_INPUT]);
587         snd_cs4231_dout(chip, CS4231_LEFT_OUTPUT,
588                         mute ? 0x80 : chip->image[CS4231_LEFT_OUTPUT]);
589         snd_cs4231_dout(chip, CS4231_RIGHT_OUTPUT,
590                         mute ? 0x80 : chip->image[CS4231_RIGHT_OUTPUT]);
591         snd_cs4231_dout(chip, CS4231_LEFT_LINE_IN,
592                         mute ? 0x80 : chip->image[CS4231_LEFT_LINE_IN]);
593         snd_cs4231_dout(chip, CS4231_RIGHT_LINE_IN,
594                         mute ? 0x80 : chip->image[CS4231_RIGHT_LINE_IN]);
595         snd_cs4231_dout(chip, CS4231_MONO_CTRL,
596                         mute ? 0xc0 : chip->image[CS4231_MONO_CTRL]);
597         chip->calibrate_mute = mute;
598         spin_unlock_irqrestore(&chip->lock, flags);
599 }
600 
601 static void snd_cs4231_playback_format(struct snd_cs4231 *chip,
602                                        struct snd_pcm_hw_params *params,
603                                        unsigned char pdfr)
604 {
605         unsigned long flags;
606 
607         mutex_lock(&chip->mce_mutex);
608         snd_cs4231_calibrate_mute(chip, 1);
609 
610         snd_cs4231_mce_up(chip);
611 
612         spin_lock_irqsave(&chip->lock, flags);
613         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
614                        (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) ?
615                        (pdfr & 0xf0) | (chip->image[CS4231_REC_FORMAT] & 0x0f) :
616                        pdfr);
617         spin_unlock_irqrestore(&chip->lock, flags);
618 
619         snd_cs4231_mce_down(chip);
620 
621         snd_cs4231_calibrate_mute(chip, 0);
622         mutex_unlock(&chip->mce_mutex);
623 }
624 
625 static void snd_cs4231_capture_format(struct snd_cs4231 *chip,
626                                       struct snd_pcm_hw_params *params,
627                                       unsigned char cdfr)
628 {
629         unsigned long flags;
630 
631         mutex_lock(&chip->mce_mutex);
632         snd_cs4231_calibrate_mute(chip, 1);
633 
634         snd_cs4231_mce_up(chip);
635 
636         spin_lock_irqsave(&chip->lock, flags);
637         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
638                 snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
639                                ((chip->image[CS4231_PLAYBK_FORMAT]) & 0xf0) |
640                                (cdfr & 0x0f));
641                 spin_unlock_irqrestore(&chip->lock, flags);
642                 snd_cs4231_mce_down(chip);
643                 snd_cs4231_mce_up(chip);
644                 spin_lock_irqsave(&chip->lock, flags);
645         }
646         snd_cs4231_out(chip, CS4231_REC_FORMAT, cdfr);
647         spin_unlock_irqrestore(&chip->lock, flags);
648 
649         snd_cs4231_mce_down(chip);
650 
651         snd_cs4231_calibrate_mute(chip, 0);
652         mutex_unlock(&chip->mce_mutex);
653 }
654 
655 /*
656  *  Timer interface
657  */
658 
659 static unsigned long snd_cs4231_timer_resolution(struct snd_timer *timer)
660 {
661         struct snd_cs4231 *chip = snd_timer_chip(timer);
662 
663         return chip->image[CS4231_PLAYBK_FORMAT] & 1 ? 9969 : 9920;
664 }
665 
666 static int snd_cs4231_timer_start(struct snd_timer *timer)
667 {
668         unsigned long flags;
669         unsigned int ticks;
670         struct snd_cs4231 *chip = snd_timer_chip(timer);
671 
672         spin_lock_irqsave(&chip->lock, flags);
673         ticks = timer->sticks;
674         if ((chip->image[CS4231_ALT_FEATURE_1] & CS4231_TIMER_ENABLE) == 0 ||
675             (unsigned char)(ticks >> 8) != chip->image[CS4231_TIMER_HIGH] ||
676             (unsigned char)ticks != chip->image[CS4231_TIMER_LOW]) {
677                 snd_cs4231_out(chip, CS4231_TIMER_HIGH,
678                                chip->image[CS4231_TIMER_HIGH] =
679                                (unsigned char) (ticks >> 8));
680                 snd_cs4231_out(chip, CS4231_TIMER_LOW,
681                                chip->image[CS4231_TIMER_LOW] =
682                                (unsigned char) ticks);
683                 snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
684                                chip->image[CS4231_ALT_FEATURE_1] |
685                                         CS4231_TIMER_ENABLE);
686         }
687         spin_unlock_irqrestore(&chip->lock, flags);
688 
689         return 0;
690 }
691 
692 static int snd_cs4231_timer_stop(struct snd_timer *timer)
693 {
694         unsigned long flags;
695         struct snd_cs4231 *chip = snd_timer_chip(timer);
696 
697         spin_lock_irqsave(&chip->lock, flags);
698         chip->image[CS4231_ALT_FEATURE_1] &= ~CS4231_TIMER_ENABLE;
699         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
700                        chip->image[CS4231_ALT_FEATURE_1]);
701         spin_unlock_irqrestore(&chip->lock, flags);
702 
703         return 0;
704 }
705 
706 static void snd_cs4231_init(struct snd_cs4231 *chip)
707 {
708         unsigned long flags;
709 
710         snd_cs4231_mce_down(chip);
711 
712 #ifdef SNDRV_DEBUG_MCE
713         snd_printdd("init: (1)\n");
714 #endif
715         snd_cs4231_mce_up(chip);
716         spin_lock_irqsave(&chip->lock, flags);
717         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE |
718                                             CS4231_PLAYBACK_PIO |
719                                             CS4231_RECORD_ENABLE |
720                                             CS4231_RECORD_PIO |
721                                             CS4231_CALIB_MODE);
722         chip->image[CS4231_IFACE_CTRL] |= CS4231_AUTOCALIB;
723         snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
724         spin_unlock_irqrestore(&chip->lock, flags);
725         snd_cs4231_mce_down(chip);
726 
727 #ifdef SNDRV_DEBUG_MCE
728         snd_printdd("init: (2)\n");
729 #endif
730 
731         snd_cs4231_mce_up(chip);
732         spin_lock_irqsave(&chip->lock, flags);
733         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
734                         chip->image[CS4231_ALT_FEATURE_1]);
735         spin_unlock_irqrestore(&chip->lock, flags);
736         snd_cs4231_mce_down(chip);
737 
738 #ifdef SNDRV_DEBUG_MCE
739         snd_printdd("init: (3) - afei = 0x%x\n",
740                     chip->image[CS4231_ALT_FEATURE_1]);
741 #endif
742 
743         spin_lock_irqsave(&chip->lock, flags);
744         snd_cs4231_out(chip, CS4231_ALT_FEATURE_2,
745                         chip->image[CS4231_ALT_FEATURE_2]);
746         spin_unlock_irqrestore(&chip->lock, flags);
747 
748         snd_cs4231_mce_up(chip);
749         spin_lock_irqsave(&chip->lock, flags);
750         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
751                         chip->image[CS4231_PLAYBK_FORMAT]);
752         spin_unlock_irqrestore(&chip->lock, flags);
753         snd_cs4231_mce_down(chip);
754 
755 #ifdef SNDRV_DEBUG_MCE
756         snd_printdd("init: (4)\n");
757 #endif
758 
759         snd_cs4231_mce_up(chip);
760         spin_lock_irqsave(&chip->lock, flags);
761         snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT]);
762         spin_unlock_irqrestore(&chip->lock, flags);
763         snd_cs4231_mce_down(chip);
764 
765 #ifdef SNDRV_DEBUG_MCE
766         snd_printdd("init: (5)\n");
767 #endif
768 }
769 
770 static int snd_cs4231_open(struct snd_cs4231 *chip, unsigned int mode)
771 {
772         unsigned long flags;
773 
774         mutex_lock(&chip->open_mutex);
775         if ((chip->mode & mode)) {
776                 mutex_unlock(&chip->open_mutex);
777                 return -EAGAIN;
778         }
779         if (chip->mode & CS4231_MODE_OPEN) {
780                 chip->mode |= mode;
781                 mutex_unlock(&chip->open_mutex);
782                 return 0;
783         }
784         /* ok. now enable and ack CODEC IRQ */
785         spin_lock_irqsave(&chip->lock, flags);
786         snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
787                        CS4231_RECORD_IRQ |
788                        CS4231_TIMER_IRQ);
789         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
790         __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));        /* clear IRQ */
791         __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));        /* clear IRQ */
792 
793         snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
794                        CS4231_RECORD_IRQ |
795                        CS4231_TIMER_IRQ);
796         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
797 
798         spin_unlock_irqrestore(&chip->lock, flags);
799 
800         chip->mode = mode;
801         mutex_unlock(&chip->open_mutex);
802         return 0;
803 }
804 
805 static void snd_cs4231_close(struct snd_cs4231 *chip, unsigned int mode)
806 {
807         unsigned long flags;
808 
809         mutex_lock(&chip->open_mutex);
810         chip->mode &= ~mode;
811         if (chip->mode & CS4231_MODE_OPEN) {
812                 mutex_unlock(&chip->open_mutex);
813                 return;
814         }
815         snd_cs4231_calibrate_mute(chip, 1);
816 
817         /* disable IRQ */
818         spin_lock_irqsave(&chip->lock, flags);
819         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
820         __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));        /* clear IRQ */
821         __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));        /* clear IRQ */
822 
823         /* now disable record & playback */
824 
825         if (chip->image[CS4231_IFACE_CTRL] &
826             (CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
827              CS4231_RECORD_ENABLE | CS4231_RECORD_PIO)) {
828                 spin_unlock_irqrestore(&chip->lock, flags);
829                 snd_cs4231_mce_up(chip);
830                 spin_lock_irqsave(&chip->lock, flags);
831                 chip->image[CS4231_IFACE_CTRL] &=
832                         ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
833                           CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
834                 snd_cs4231_out(chip, CS4231_IFACE_CTRL,
835                                 chip->image[CS4231_IFACE_CTRL]);
836                 spin_unlock_irqrestore(&chip->lock, flags);
837                 snd_cs4231_mce_down(chip);
838                 spin_lock_irqsave(&chip->lock, flags);
839         }
840 
841         /* clear IRQ again */
842         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
843         __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));        /* clear IRQ */
844         __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));        /* clear IRQ */
845         spin_unlock_irqrestore(&chip->lock, flags);
846 
847         snd_cs4231_calibrate_mute(chip, 0);
848 
849         chip->mode = 0;
850         mutex_unlock(&chip->open_mutex);
851 }
852 
853 /*
854  *  timer open/close
855  */
856 
857 static int snd_cs4231_timer_open(struct snd_timer *timer)
858 {
859         struct snd_cs4231 *chip = snd_timer_chip(timer);
860         snd_cs4231_open(chip, CS4231_MODE_TIMER);
861         return 0;
862 }
863 
864 static int snd_cs4231_timer_close(struct snd_timer *timer)
865 {
866         struct snd_cs4231 *chip = snd_timer_chip(timer);
867         snd_cs4231_close(chip, CS4231_MODE_TIMER);
868         return 0;
869 }
870 
871 static struct snd_timer_hardware snd_cs4231_timer_table = {
872         .flags          =       SNDRV_TIMER_HW_AUTO,
873         .resolution     =       9945,
874         .ticks          =       65535,
875         .open           =       snd_cs4231_timer_open,
876         .close          =       snd_cs4231_timer_close,
877         .c_resolution   =       snd_cs4231_timer_resolution,
878         .start          =       snd_cs4231_timer_start,
879         .stop           =       snd_cs4231_timer_stop,
880 };
881 
882 /*
883  *  ok.. exported functions..
884  */
885 
886 static int snd_cs4231_playback_hw_params(struct snd_pcm_substream *substream,
887                                          struct snd_pcm_hw_params *hw_params)
888 {
889         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
890         unsigned char new_pdfr;
891         int err;
892 
893         err = snd_pcm_lib_malloc_pages(substream,
894                                         params_buffer_bytes(hw_params));
895         if (err < 0)
896                 return err;
897         new_pdfr = snd_cs4231_get_format(chip, params_format(hw_params),
898                                          params_channels(hw_params)) |
899                 snd_cs4231_get_rate(params_rate(hw_params));
900         snd_cs4231_playback_format(chip, hw_params, new_pdfr);
901 
902         return 0;
903 }
904 
905 static int snd_cs4231_playback_prepare(struct snd_pcm_substream *substream)
906 {
907         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
908         struct snd_pcm_runtime *runtime = substream->runtime;
909         unsigned long flags;
910         int ret = 0;
911 
912         spin_lock_irqsave(&chip->lock, flags);
913 
914         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE |
915                                             CS4231_PLAYBACK_PIO);
916 
917         if (WARN_ON(runtime->period_size > 0xffff + 1)) {
918                 ret = -EINVAL;
919                 goto out;
920         }
921 
922         chip->p_periods_sent = 0;
923 
924 out:
925         spin_unlock_irqrestore(&chip->lock, flags);
926 
927         return ret;
928 }
929 
930 static int snd_cs4231_capture_hw_params(struct snd_pcm_substream *substream,
931                                         struct snd_pcm_hw_params *hw_params)
932 {
933         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
934         unsigned char new_cdfr;
935         int err;
936 
937         err = snd_pcm_lib_malloc_pages(substream,
938                                         params_buffer_bytes(hw_params));
939         if (err < 0)
940                 return err;
941         new_cdfr = snd_cs4231_get_format(chip, params_format(hw_params),
942                                          params_channels(hw_params)) |
943                 snd_cs4231_get_rate(params_rate(hw_params));
944         snd_cs4231_capture_format(chip, hw_params, new_cdfr);
945 
946         return 0;
947 }
948 
949 static int snd_cs4231_capture_prepare(struct snd_pcm_substream *substream)
950 {
951         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
952         unsigned long flags;
953 
954         spin_lock_irqsave(&chip->lock, flags);
955         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE |
956                                             CS4231_RECORD_PIO);
957 
958 
959         chip->c_periods_sent = 0;
960         spin_unlock_irqrestore(&chip->lock, flags);
961 
962         return 0;
963 }
964 
965 static void snd_cs4231_overrange(struct snd_cs4231 *chip)
966 {
967         unsigned long flags;
968         unsigned char res;
969 
970         spin_lock_irqsave(&chip->lock, flags);
971         res = snd_cs4231_in(chip, CS4231_TEST_INIT);
972         spin_unlock_irqrestore(&chip->lock, flags);
973 
974         /* detect overrange only above 0dB; may be user selectable? */
975         if (res & (0x08 | 0x02))
976                 chip->capture_substream->runtime->overrange++;
977 }
978 
979 static void snd_cs4231_play_callback(struct snd_cs4231 *chip)
980 {
981         if (chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE) {
982                 snd_pcm_period_elapsed(chip->playback_substream);
983                 snd_cs4231_advance_dma(&chip->p_dma, chip->playback_substream,
984                                             &chip->p_periods_sent);
985         }
986 }
987 
988 static void snd_cs4231_capture_callback(struct snd_cs4231 *chip)
989 {
990         if (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) {
991                 snd_pcm_period_elapsed(chip->capture_substream);
992                 snd_cs4231_advance_dma(&chip->c_dma, chip->capture_substream,
993                                             &chip->c_periods_sent);
994         }
995 }
996 
997 static snd_pcm_uframes_t snd_cs4231_playback_pointer(
998                                         struct snd_pcm_substream *substream)
999 {
1000         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1001         struct cs4231_dma_control *dma_cont = &chip->p_dma;
1002         size_t ptr;
1003 
1004         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
1005                 return 0;
1006         ptr = dma_cont->address(dma_cont);
1007         if (ptr != 0)
1008                 ptr -= substream->runtime->dma_addr;
1009 
1010         return bytes_to_frames(substream->runtime, ptr);
1011 }
1012 
1013 static snd_pcm_uframes_t snd_cs4231_capture_pointer(
1014                                         struct snd_pcm_substream *substream)
1015 {
1016         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1017         struct cs4231_dma_control *dma_cont = &chip->c_dma;
1018         size_t ptr;
1019 
1020         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE))
1021                 return 0;
1022         ptr = dma_cont->address(dma_cont);
1023         if (ptr != 0)
1024                 ptr -= substream->runtime->dma_addr;
1025 
1026         return bytes_to_frames(substream->runtime, ptr);
1027 }
1028 
1029 static int snd_cs4231_probe(struct snd_cs4231 *chip)
1030 {
1031         unsigned long flags;
1032         int i;
1033         int id = 0;
1034         int vers = 0;
1035         unsigned char *ptr;
1036 
1037         for (i = 0; i < 50; i++) {
1038                 mb();
1039                 if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
1040                         msleep(2);
1041                 else {
1042                         spin_lock_irqsave(&chip->lock, flags);
1043                         snd_cs4231_out(chip, CS4231_MISC_INFO, CS4231_MODE2);
1044                         id = snd_cs4231_in(chip, CS4231_MISC_INFO) & 0x0f;
1045                         vers = snd_cs4231_in(chip, CS4231_VERSION);
1046                         spin_unlock_irqrestore(&chip->lock, flags);
1047                         if (id == 0x0a)
1048                                 break;  /* this is valid value */
1049                 }
1050         }
1051         snd_printdd("cs4231: port = %p, id = 0x%x\n", chip->port, id);
1052         if (id != 0x0a)
1053                 return -ENODEV; /* no valid device found */
1054 
1055         spin_lock_irqsave(&chip->lock, flags);
1056 
1057         /* clear any pendings IRQ */
1058         __cs4231_readb(chip, CS4231U(chip, STATUS));
1059         __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));
1060         mb();
1061 
1062         spin_unlock_irqrestore(&chip->lock, flags);
1063 
1064         chip->image[CS4231_MISC_INFO] = CS4231_MODE2;
1065         chip->image[CS4231_IFACE_CTRL] =
1066                 chip->image[CS4231_IFACE_CTRL] & ~CS4231_SINGLE_DMA;
1067         chip->image[CS4231_ALT_FEATURE_1] = 0x80;
1068         chip->image[CS4231_ALT_FEATURE_2] = 0x01;
1069         if (vers & 0x20)
1070                 chip->image[CS4231_ALT_FEATURE_2] |= 0x02;
1071 
1072         ptr = (unsigned char *) &chip->image;
1073 
1074         snd_cs4231_mce_down(chip);
1075 
1076         spin_lock_irqsave(&chip->lock, flags);
1077 
1078         for (i = 0; i < 32; i++)        /* ok.. fill all CS4231 registers */
1079                 snd_cs4231_out(chip, i, *ptr++);
1080 
1081         spin_unlock_irqrestore(&chip->lock, flags);
1082 
1083         snd_cs4231_mce_up(chip);
1084 
1085         snd_cs4231_mce_down(chip);
1086 
1087         mdelay(2);
1088 
1089         return 0;               /* all things are ok.. */
1090 }
1091 
1092 static struct snd_pcm_hardware snd_cs4231_playback = {
1093         .info                   = SNDRV_PCM_INFO_MMAP |
1094                                   SNDRV_PCM_INFO_INTERLEAVED |
1095                                   SNDRV_PCM_INFO_MMAP_VALID |
1096                                   SNDRV_PCM_INFO_SYNC_START,
1097         .formats                = SNDRV_PCM_FMTBIT_MU_LAW |
1098                                   SNDRV_PCM_FMTBIT_A_LAW |
1099                                   SNDRV_PCM_FMTBIT_IMA_ADPCM |
1100                                   SNDRV_PCM_FMTBIT_U8 |
1101                                   SNDRV_PCM_FMTBIT_S16_LE |
1102                                   SNDRV_PCM_FMTBIT_S16_BE,
1103         .rates                  = SNDRV_PCM_RATE_KNOT |
1104                                   SNDRV_PCM_RATE_8000_48000,
1105         .rate_min               = 5510,
1106         .rate_max               = 48000,
1107         .channels_min           = 1,
1108         .channels_max           = 2,
1109         .buffer_bytes_max       = 32 * 1024,
1110         .period_bytes_min       = 64,
1111         .period_bytes_max       = 32 * 1024,
1112         .periods_min            = 1,
1113         .periods_max            = 1024,
1114 };
1115 
1116 static struct snd_pcm_hardware snd_cs4231_capture = {
1117         .info                   = SNDRV_PCM_INFO_MMAP |
1118                                   SNDRV_PCM_INFO_INTERLEAVED |
1119                                   SNDRV_PCM_INFO_MMAP_VALID |
1120                                   SNDRV_PCM_INFO_SYNC_START,
1121         .formats                = SNDRV_PCM_FMTBIT_MU_LAW |
1122                                   SNDRV_PCM_FMTBIT_A_LAW |
1123                                   SNDRV_PCM_FMTBIT_IMA_ADPCM |
1124                                   SNDRV_PCM_FMTBIT_U8 |
1125                                   SNDRV_PCM_FMTBIT_S16_LE |
1126                                   SNDRV_PCM_FMTBIT_S16_BE,
1127         .rates                  = SNDRV_PCM_RATE_KNOT |
1128                                   SNDRV_PCM_RATE_8000_48000,
1129         .rate_min               = 5510,
1130         .rate_max               = 48000,
1131         .channels_min           = 1,
1132         .channels_max           = 2,
1133         .buffer_bytes_max       = 32 * 1024,
1134         .period_bytes_min       = 64,
1135         .period_bytes_max       = 32 * 1024,
1136         .periods_min            = 1,
1137         .periods_max            = 1024,
1138 };
1139 
1140 static int snd_cs4231_playback_open(struct snd_pcm_substream *substream)
1141 {
1142         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1143         struct snd_pcm_runtime *runtime = substream->runtime;
1144         int err;
1145 
1146         runtime->hw = snd_cs4231_playback;
1147 
1148         err = snd_cs4231_open(chip, CS4231_MODE_PLAY);
1149         if (err < 0) {
1150                 snd_free_pages(runtime->dma_area, runtime->dma_bytes);
1151                 return err;
1152         }
1153         chip->playback_substream = substream;
1154         chip->p_periods_sent = 0;
1155         snd_pcm_set_sync(substream);
1156         snd_cs4231_xrate(runtime);
1157 
1158         return 0;
1159 }
1160 
1161 static int snd_cs4231_capture_open(struct snd_pcm_substream *substream)
1162 {
1163         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1164         struct snd_pcm_runtime *runtime = substream->runtime;
1165         int err;
1166 
1167         runtime->hw = snd_cs4231_capture;
1168 
1169         err = snd_cs4231_open(chip, CS4231_MODE_RECORD);
1170         if (err < 0) {
1171                 snd_free_pages(runtime->dma_area, runtime->dma_bytes);
1172                 return err;
1173         }
1174         chip->capture_substream = substream;
1175         chip->c_periods_sent = 0;
1176         snd_pcm_set_sync(substream);
1177         snd_cs4231_xrate(runtime);
1178 
1179         return 0;
1180 }
1181 
1182 static int snd_cs4231_playback_close(struct snd_pcm_substream *substream)
1183 {
1184         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1185 
1186         snd_cs4231_close(chip, CS4231_MODE_PLAY);
1187         chip->playback_substream = NULL;
1188 
1189         return 0;
1190 }
1191 
1192 static int snd_cs4231_capture_close(struct snd_pcm_substream *substream)
1193 {
1194         struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
1195 
1196         snd_cs4231_close(chip, CS4231_MODE_RECORD);
1197         chip->capture_substream = NULL;
1198 
1199         return 0;
1200 }
1201 
1202 /* XXX We can do some power-management, in particular on EBUS using
1203  * XXX the audio AUXIO register...
1204  */
1205 
1206 static struct snd_pcm_ops snd_cs4231_playback_ops = {
1207         .open           =       snd_cs4231_playback_open,
1208         .close          =       snd_cs4231_playback_close,
1209         .ioctl          =       snd_pcm_lib_ioctl,
1210         .hw_params      =       snd_cs4231_playback_hw_params,
1211         .hw_free        =       snd_pcm_lib_free_pages,
1212         .prepare        =       snd_cs4231_playback_prepare,
1213         .trigger        =       snd_cs4231_trigger,
1214         .pointer        =       snd_cs4231_playback_pointer,
1215 };
1216 
1217 static struct snd_pcm_ops snd_cs4231_capture_ops = {
1218         .open           =       snd_cs4231_capture_open,
1219         .close          =       snd_cs4231_capture_close,
1220         .ioctl          =       snd_pcm_lib_ioctl,
1221         .hw_params      =       snd_cs4231_capture_hw_params,
1222         .hw_free        =       snd_pcm_lib_free_pages,
1223         .prepare        =       snd_cs4231_capture_prepare,
1224         .trigger        =       snd_cs4231_trigger,
1225         .pointer        =       snd_cs4231_capture_pointer,
1226 };
1227 
1228 static int snd_cs4231_pcm(struct snd_card *card)
1229 {
1230         struct snd_cs4231 *chip = card->private_data;
1231         struct snd_pcm *pcm;
1232         int err;
1233 
1234         err = snd_pcm_new(card, "CS4231", 0, 1, 1, &pcm);
1235         if (err < 0)
1236                 return err;
1237 
1238         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1239                         &snd_cs4231_playback_ops);
1240         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
1241                         &snd_cs4231_capture_ops);
1242 
1243         /* global setup */
1244         pcm->private_data = chip;
1245         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
1246         strcpy(pcm->name, "CS4231");
1247 
1248         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1249                                               &chip->op->dev,
1250                                               64 * 1024, 128 * 1024);
1251 
1252         chip->pcm = pcm;
1253 
1254         return 0;
1255 }
1256 
1257 static int snd_cs4231_timer(struct snd_card *card)
1258 {
1259         struct snd_cs4231 *chip = card->private_data;
1260         struct snd_timer *timer;
1261         struct snd_timer_id tid;
1262         int err;
1263 
1264         /* Timer initialization */
1265         tid.dev_class = SNDRV_TIMER_CLASS_CARD;
1266         tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
1267         tid.card = card->number;
1268         tid.device = 0;
1269         tid.subdevice = 0;
1270         err = snd_timer_new(card, "CS4231", &tid, &timer);
1271         if (err < 0)
1272                 return err;
1273         strcpy(timer->name, "CS4231");
1274         timer->private_data = chip;
1275         timer->hw = snd_cs4231_timer_table;
1276         chip->timer = timer;
1277 
1278         return 0;
1279 }
1280 
1281 /*
1282  *  MIXER part
1283  */
1284 
1285 static int snd_cs4231_info_mux(struct snd_kcontrol *kcontrol,
1286                                struct snd_ctl_elem_info *uinfo)
1287 {
1288         static char *texts[4] = {
1289                 "Line", "CD", "Mic", "Mix"
1290         };
1291 
1292         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1293         uinfo->count = 2;
1294         uinfo->value.enumerated.items = 4;
1295         if (uinfo->value.enumerated.item > 3)
1296                 uinfo->value.enumerated.item = 3;
1297         strcpy(uinfo->value.enumerated.name,
1298                 texts[uinfo->value.enumerated.item]);
1299 
1300         return 0;
1301 }
1302 
1303 static int snd_cs4231_get_mux(struct snd_kcontrol *kcontrol,
1304                               struct snd_ctl_elem_value *ucontrol)
1305 {
1306         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1307         unsigned long flags;
1308 
1309         spin_lock_irqsave(&chip->lock, flags);
1310         ucontrol->value.enumerated.item[0] =
1311                 (chip->image[CS4231_LEFT_INPUT] & CS4231_MIXS_ALL) >> 6;
1312         ucontrol->value.enumerated.item[1] =
1313                 (chip->image[CS4231_RIGHT_INPUT] & CS4231_MIXS_ALL) >> 6;
1314         spin_unlock_irqrestore(&chip->lock, flags);
1315 
1316         return 0;
1317 }
1318 
1319 static int snd_cs4231_put_mux(struct snd_kcontrol *kcontrol,
1320                               struct snd_ctl_elem_value *ucontrol)
1321 {
1322         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1323         unsigned long flags;
1324         unsigned short left, right;
1325         int change;
1326 
1327         if (ucontrol->value.enumerated.item[0] > 3 ||
1328             ucontrol->value.enumerated.item[1] > 3)
1329                 return -EINVAL;
1330         left = ucontrol->value.enumerated.item[0] << 6;
1331         right = ucontrol->value.enumerated.item[1] << 6;
1332 
1333         spin_lock_irqsave(&chip->lock, flags);
1334 
1335         left = (chip->image[CS4231_LEFT_INPUT] & ~CS4231_MIXS_ALL) | left;
1336         right = (chip->image[CS4231_RIGHT_INPUT] & ~CS4231_MIXS_ALL) | right;
1337         change = left != chip->image[CS4231_LEFT_INPUT] ||
1338                  right != chip->image[CS4231_RIGHT_INPUT];
1339         snd_cs4231_out(chip, CS4231_LEFT_INPUT, left);
1340         snd_cs4231_out(chip, CS4231_RIGHT_INPUT, right);
1341 
1342         spin_unlock_irqrestore(&chip->lock, flags);
1343 
1344         return change;
1345 }
1346 
1347 static int snd_cs4231_info_single(struct snd_kcontrol *kcontrol,
1348                                   struct snd_ctl_elem_info *uinfo)
1349 {
1350         int mask = (kcontrol->private_value >> 16) & 0xff;
1351 
1352         uinfo->type = (mask == 1) ?
1353                 SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1354         uinfo->count = 1;
1355         uinfo->value.integer.min = 0;
1356         uinfo->value.integer.max = mask;
1357 
1358         return 0;
1359 }
1360 
1361 static int snd_cs4231_get_single(struct snd_kcontrol *kcontrol,
1362                                  struct snd_ctl_elem_value *ucontrol)
1363 {
1364         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1365         unsigned long flags;
1366         int reg = kcontrol->private_value & 0xff;
1367         int shift = (kcontrol->private_value >> 8) & 0xff;
1368         int mask = (kcontrol->private_value >> 16) & 0xff;
1369         int invert = (kcontrol->private_value >> 24) & 0xff;
1370 
1371         spin_lock_irqsave(&chip->lock, flags);
1372 
1373         ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;
1374 
1375         spin_unlock_irqrestore(&chip->lock, flags);
1376 
1377         if (invert)
1378                 ucontrol->value.integer.value[0] =
1379                         (mask - ucontrol->value.integer.value[0]);
1380 
1381         return 0;
1382 }
1383 
1384 static int snd_cs4231_put_single(struct snd_kcontrol *kcontrol,
1385                                  struct snd_ctl_elem_value *ucontrol)
1386 {
1387         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1388         unsigned long flags;
1389         int reg = kcontrol->private_value & 0xff;
1390         int shift = (kcontrol->private_value >> 8) & 0xff;
1391         int mask = (kcontrol->private_value >> 16) & 0xff;
1392         int invert = (kcontrol->private_value >> 24) & 0xff;
1393         int change;
1394         unsigned short val;
1395 
1396         val = (ucontrol->value.integer.value[0] & mask);
1397         if (invert)
1398                 val = mask - val;
1399         val <<= shift;
1400 
1401         spin_lock_irqsave(&chip->lock, flags);
1402 
1403         val = (chip->image[reg] & ~(mask << shift)) | val;
1404         change = val != chip->image[reg];
1405         snd_cs4231_out(chip, reg, val);
1406 
1407         spin_unlock_irqrestore(&chip->lock, flags);
1408 
1409         return change;
1410 }
1411 
1412 static int snd_cs4231_info_double(struct snd_kcontrol *kcontrol,
1413                                   struct snd_ctl_elem_info *uinfo)
1414 {
1415         int mask = (kcontrol->private_value >> 24) & 0xff;
1416 
1417         uinfo->type = mask == 1 ?
1418                 SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1419         uinfo->count = 2;
1420         uinfo->value.integer.min = 0;
1421         uinfo->value.integer.max = mask;
1422 
1423         return 0;
1424 }
1425 
1426 static int snd_cs4231_get_double(struct snd_kcontrol *kcontrol,
1427                                  struct snd_ctl_elem_value *ucontrol)
1428 {
1429         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1430         unsigned long flags;
1431         int left_reg = kcontrol->private_value & 0xff;
1432         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1433         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1434         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1435         int mask = (kcontrol->private_value >> 24) & 0xff;
1436         int invert = (kcontrol->private_value >> 22) & 1;
1437 
1438         spin_lock_irqsave(&chip->lock, flags);
1439 
1440         ucontrol->value.integer.value[0] =
1441                 (chip->image[left_reg] >> shift_left) & mask;
1442         ucontrol->value.integer.value[1] =
1443                 (chip->image[right_reg] >> shift_right) & mask;
1444 
1445         spin_unlock_irqrestore(&chip->lock, flags);
1446 
1447         if (invert) {
1448                 ucontrol->value.integer.value[0] =
1449                         (mask - ucontrol->value.integer.value[0]);
1450                 ucontrol->value.integer.value[1] =
1451                         (mask - ucontrol->value.integer.value[1]);
1452         }
1453 
1454         return 0;
1455 }
1456 
1457 static int snd_cs4231_put_double(struct snd_kcontrol *kcontrol,
1458                                  struct snd_ctl_elem_value *ucontrol)
1459 {
1460         struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
1461         unsigned long flags;
1462         int left_reg = kcontrol->private_value & 0xff;
1463         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1464         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1465         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1466         int mask = (kcontrol->private_value >> 24) & 0xff;
1467         int invert = (kcontrol->private_value >> 22) & 1;
1468         int change;
1469         unsigned short val1, val2;
1470 
1471         val1 = ucontrol->value.integer.value[0] & mask;
1472         val2 = ucontrol->value.integer.value[1] & mask;
1473         if (invert) {
1474                 val1 = mask - val1;
1475                 val2 = mask - val2;
1476         }
1477         val1 <<= shift_left;
1478         val2 <<= shift_right;
1479 
1480         spin_lock_irqsave(&chip->lock, flags);
1481 
1482         val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
1483         val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
1484         change = val1 != chip->image[left_reg];
1485         change |= val2 != chip->image[right_reg];
1486         snd_cs4231_out(chip, left_reg, val1);
1487         snd_cs4231_out(chip, right_reg, val2);
1488 
1489         spin_unlock_irqrestore(&chip->lock, flags);
1490 
1491         return change;
1492 }
1493 
1494 #define CS4231_SINGLE(xname, xindex, reg, shift, mask, invert) \
1495 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), .index = (xindex), \
1496   .info = snd_cs4231_info_single,       \
1497   .get = snd_cs4231_get_single, .put = snd_cs4231_put_single,   \
1498   .private_value = (reg) | ((shift) << 8) | ((mask) << 16) | ((invert) << 24) }
1499 
1500 #define CS4231_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, \
1501                         shift_right, mask, invert) \
1502 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), .index = (xindex), \
1503   .info = snd_cs4231_info_double,       \
1504   .get = snd_cs4231_get_double, .put = snd_cs4231_put_double,   \
1505   .private_value = (left_reg) | ((right_reg) << 8) | ((shift_left) << 16) | \
1506                    ((shift_right) << 19) | ((mask) << 24) | ((invert) << 22) }
1507 
1508 static struct snd_kcontrol_new snd_cs4231_controls[] = {
1509 CS4231_DOUBLE("PCM Playback Switch", 0, CS4231_LEFT_OUTPUT,
1510                 CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
1511 CS4231_DOUBLE("PCM Playback Volume", 0, CS4231_LEFT_OUTPUT,
1512                 CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),
1513 CS4231_DOUBLE("Line Playback Switch", 0, CS4231_LEFT_LINE_IN,
1514                 CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
1515 CS4231_DOUBLE("Line Playback Volume", 0, CS4231_LEFT_LINE_IN,
1516                 CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),
1517 CS4231_DOUBLE("Aux Playback Switch", 0, CS4231_AUX1_LEFT_INPUT,
1518                 CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
1519 CS4231_DOUBLE("Aux Playback Volume", 0, CS4231_AUX1_LEFT_INPUT,
1520                 CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),
1521 CS4231_DOUBLE("Aux Playback Switch", 1, CS4231_AUX2_LEFT_INPUT,
1522                 CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
1523 CS4231_DOUBLE("Aux Playback Volume", 1, CS4231_AUX2_LEFT_INPUT,
1524                 CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),
1525 CS4231_SINGLE("Mono Playback Switch", 0, CS4231_MONO_CTRL, 7, 1, 1),
1526 CS4231_SINGLE("Mono Playback Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),
1527 CS4231_SINGLE("Mono Output Playback Switch", 0, CS4231_MONO_CTRL, 6, 1, 1),
1528 CS4231_SINGLE("Mono Output Playback Bypass", 0, CS4231_MONO_CTRL, 5, 1, 0),
1529 CS4231_DOUBLE("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 0, 0,
1530                 15, 0),
1531 {
1532         .iface  = SNDRV_CTL_ELEM_IFACE_MIXER,
1533         .name   = "Capture Source",
1534         .info   = snd_cs4231_info_mux,
1535         .get    = snd_cs4231_get_mux,
1536         .put    = snd_cs4231_put_mux,
1537 },
1538 CS4231_DOUBLE("Mic Boost", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 5, 5,
1539                 1, 0),
1540 CS4231_SINGLE("Loopback Capture Switch", 0, CS4231_LOOPBACK, 0, 1, 0),
1541 CS4231_SINGLE("Loopback Capture Volume", 0, CS4231_LOOPBACK, 2, 63, 1),
1542 /* SPARC specific uses of XCTL{0,1} general purpose outputs.  */
1543 CS4231_SINGLE("Line Out Switch", 0, CS4231_PIN_CTRL, 6, 1, 1),
1544 CS4231_SINGLE("Headphone Out Switch", 0, CS4231_PIN_CTRL, 7, 1, 1)
1545 };
1546 
1547 static int snd_cs4231_mixer(struct snd_card *card)
1548 {
1549         struct snd_cs4231 *chip = card->private_data;
1550         int err, idx;
1551 
1552         if (snd_BUG_ON(!chip || !chip->pcm))
1553                 return -EINVAL;
1554 
1555         strcpy(card->mixername, chip->pcm->name);
1556 
1557         for (idx = 0; idx < ARRAY_SIZE(snd_cs4231_controls); idx++) {
1558                 err = snd_ctl_add(card,
1559                                  snd_ctl_new1(&snd_cs4231_controls[idx], chip));
1560                 if (err < 0)
1561                         return err;
1562         }
1563         return 0;
1564 }
1565 
1566 static int dev;
1567 
1568 static int cs4231_attach_begin(struct platform_device *op,
1569                                struct snd_card **rcard)
1570 {
1571         struct snd_card *card;
1572         struct snd_cs4231 *chip;
1573         int err;
1574 
1575         *rcard = NULL;
1576 
1577         if (dev >= SNDRV_CARDS)
1578                 return -ENODEV;
1579 
1580         if (!enable[dev]) {
1581                 dev++;
1582                 return -ENOENT;
1583         }
1584 
1585         err = snd_card_new(&op->dev, index[dev], id[dev], THIS_MODULE,
1586                            sizeof(struct snd_cs4231), &card);
1587         if (err < 0)
1588                 return err;
1589 
1590         strcpy(card->driver, "CS4231");
1591         strcpy(card->shortname, "Sun CS4231");
1592 
1593         chip = card->private_data;
1594         chip->card = card;
1595 
1596         *rcard = card;
1597         return 0;
1598 }
1599 
1600 static int cs4231_attach_finish(struct snd_card *card)
1601 {
1602         struct snd_cs4231 *chip = card->private_data;
1603         int err;
1604 
1605         err = snd_cs4231_pcm(card);
1606         if (err < 0)
1607                 goto out_err;
1608 
1609         err = snd_cs4231_mixer(card);
1610         if (err < 0)
1611                 goto out_err;
1612 
1613         err = snd_cs4231_timer(card);
1614         if (err < 0)
1615                 goto out_err;
1616 
1617         err = snd_card_register(card);
1618         if (err < 0)
1619                 goto out_err;
1620 
1621         dev_set_drvdata(&chip->op->dev, chip);
1622 
1623         dev++;
1624         return 0;
1625 
1626 out_err:
1627         snd_card_free(card);
1628         return err;
1629 }
1630 
1631 #ifdef SBUS_SUPPORT
1632 
1633 static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id)
1634 {
1635         unsigned long flags;
1636         unsigned char status;
1637         u32 csr;
1638         struct snd_cs4231 *chip = dev_id;
1639 
1640         /*This is IRQ is not raised by the cs4231*/
1641         if (!(__cs4231_readb(chip, CS4231U(chip, STATUS)) & CS4231_GLOBALIRQ))
1642                 return IRQ_NONE;
1643 
1644         /* ACK the APC interrupt. */
1645         csr = sbus_readl(chip->port + APCCSR);
1646 
1647         sbus_writel(csr, chip->port + APCCSR);
1648 
1649         if ((csr & APC_PDMA_READY) &&
1650             (csr & APC_PLAY_INT) &&
1651             (csr & APC_XINT_PNVA) &&
1652             !(csr & APC_XINT_EMPT))
1653                         snd_cs4231_play_callback(chip);
1654 
1655         if ((csr & APC_CDMA_READY) &&
1656             (csr & APC_CAPT_INT) &&
1657             (csr & APC_XINT_CNVA) &&
1658             !(csr & APC_XINT_EMPT))
1659                         snd_cs4231_capture_callback(chip);
1660 
1661         status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);
1662 
1663         if (status & CS4231_TIMER_IRQ) {
1664                 if (chip->timer)
1665                         snd_timer_interrupt(chip->timer, chip->timer->sticks);
1666         }
1667 
1668         if ((status & CS4231_RECORD_IRQ) && (csr & APC_CDMA_READY))
1669                 snd_cs4231_overrange(chip);
1670 
1671         /* ACK the CS4231 interrupt. */
1672         spin_lock_irqsave(&chip->lock, flags);
1673         snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
1674         spin_unlock_irqrestore(&chip->lock, flags);
1675 
1676         return IRQ_HANDLED;
1677 }
1678 
1679 /*
1680  * SBUS DMA routines
1681  */
1682 
1683 static int sbus_dma_request(struct cs4231_dma_control *dma_cont,
1684                             dma_addr_t bus_addr, size_t len)
1685 {
1686         unsigned long flags;
1687         u32 test, csr;
1688         int err;
1689         struct sbus_dma_info *base = &dma_cont->sbus_info;
1690 
1691         if (len >= (1 << 24))
1692                 return -EINVAL;
1693         spin_lock_irqsave(&base->lock, flags);
1694         csr = sbus_readl(base->regs + APCCSR);
1695         err = -EINVAL;
1696         test = APC_CDMA_READY;
1697         if (base->dir == APC_PLAY)
1698                 test = APC_PDMA_READY;
1699         if (!(csr & test))
1700                 goto out;
1701         err = -EBUSY;
1702         test = APC_XINT_CNVA;
1703         if (base->dir == APC_PLAY)
1704                 test = APC_XINT_PNVA;
1705         if (!(csr & test))
1706                 goto out;
1707         err = 0;
1708         sbus_writel(bus_addr, base->regs + base->dir + APCNVA);
1709         sbus_writel(len, base->regs + base->dir + APCNC);
1710 out:
1711         spin_unlock_irqrestore(&base->lock, flags);
1712         return err;
1713 }
1714 
1715 static void sbus_dma_prepare(struct cs4231_dma_control *dma_cont, int d)
1716 {
1717         unsigned long flags;
1718         u32 csr, test;
1719         struct sbus_dma_info *base = &dma_cont->sbus_info;
1720 
1721         spin_lock_irqsave(&base->lock, flags);
1722         csr = sbus_readl(base->regs + APCCSR);
1723         test =  APC_GENL_INT | APC_PLAY_INT | APC_XINT_ENA |
1724                 APC_XINT_PLAY | APC_XINT_PEMP | APC_XINT_GENL |
1725                  APC_XINT_PENA;
1726         if (base->dir == APC_RECORD)
1727                 test = APC_GENL_INT | APC_CAPT_INT | APC_XINT_ENA |
1728                         APC_XINT_CAPT | APC_XINT_CEMP | APC_XINT_GENL;
1729         csr |= test;
1730         sbus_writel(csr, base->regs + APCCSR);
1731         spin_unlock_irqrestore(&base->lock, flags);
1732 }
1733 
1734 static void sbus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
1735 {
1736         unsigned long flags;
1737         u32 csr, shift;
1738         struct sbus_dma_info *base = &dma_cont->sbus_info;
1739 
1740         spin_lock_irqsave(&base->lock, flags);
1741         if (!on) {
1742                 sbus_writel(0, base->regs + base->dir + APCNC);
1743                 sbus_writel(0, base->regs + base->dir + APCNVA);
1744                 if (base->dir == APC_PLAY) {
1745                         sbus_writel(0, base->regs + base->dir + APCC);
1746                         sbus_writel(0, base->regs + base->dir + APCVA);
1747                 }
1748 
1749                 udelay(1200);
1750         }
1751         csr = sbus_readl(base->regs + APCCSR);
1752         shift = 0;
1753         if (base->dir == APC_PLAY)
1754                 shift = 1;
1755         if (on)
1756                 csr &= ~(APC_CPAUSE << shift);
1757         else
1758                 csr |= (APC_CPAUSE << shift);
1759         sbus_writel(csr, base->regs + APCCSR);
1760         if (on)
1761                 csr |= (APC_CDMA_READY << shift);
1762         else
1763                 csr &= ~(APC_CDMA_READY << shift);
1764         sbus_writel(csr, base->regs + APCCSR);
1765 
1766         spin_unlock_irqrestore(&base->lock, flags);
1767 }
1768 
1769 static unsigned int sbus_dma_addr(struct cs4231_dma_control *dma_cont)
1770 {
1771         struct sbus_dma_info *base = &dma_cont->sbus_info;
1772 
1773         return sbus_readl(base->regs + base->dir + APCVA);
1774 }
1775 
1776 /*
1777  * Init and exit routines
1778  */
1779 
1780 static int snd_cs4231_sbus_free(struct snd_cs4231 *chip)
1781 {
1782         struct platform_device *op = chip->op;
1783 
1784         if (chip->irq[0])
1785                 free_irq(chip->irq[0], chip);
1786 
1787         if (chip->port)
1788                 of_iounmap(&op->resource[0], chip->port, chip->regs_size);
1789 
1790         return 0;
1791 }
1792 
1793 static int snd_cs4231_sbus_dev_free(struct snd_device *device)
1794 {
1795         struct snd_cs4231 *cp = device->device_data;
1796 
1797         return snd_cs4231_sbus_free(cp);
1798 }
1799 
1800 static struct snd_device_ops snd_cs4231_sbus_dev_ops = {
1801         .dev_free       =       snd_cs4231_sbus_dev_free,
1802 };
1803 
1804 static int snd_cs4231_sbus_create(struct snd_card *card,
1805                                   struct platform_device *op,
1806                                   int dev)
1807 {
1808         struct snd_cs4231 *chip = card->private_data;
1809         int err;
1810 
1811         spin_lock_init(&chip->lock);
1812         spin_lock_init(&chip->c_dma.sbus_info.lock);
1813         spin_lock_init(&chip->p_dma.sbus_info.lock);
1814         mutex_init(&chip->mce_mutex);
1815         mutex_init(&chip->open_mutex);
1816         chip->op = op;
1817         chip->regs_size = resource_size(&op->resource[0]);
1818         memcpy(&chip->image, &snd_cs4231_original_image,
1819                sizeof(snd_cs4231_original_image));
1820 
1821         chip->port = of_ioremap(&op->resource[0], 0,
1822                                 chip->regs_size, "cs4231");
1823         if (!chip->port) {
1824                 snd_printdd("cs4231-%d: Unable to map chip registers.\n", dev);
1825                 return -EIO;
1826         }
1827 
1828         chip->c_dma.sbus_info.regs = chip->port;
1829         chip->p_dma.sbus_info.regs = chip->port;
1830         chip->c_dma.sbus_info.dir = APC_RECORD;
1831         chip->p_dma.sbus_info.dir = APC_PLAY;
1832 
1833         chip->p_dma.prepare = sbus_dma_prepare;
1834         chip->p_dma.enable = sbus_dma_enable;
1835         chip->p_dma.request = sbus_dma_request;
1836         chip->p_dma.address = sbus_dma_addr;
1837 
1838         chip->c_dma.prepare = sbus_dma_prepare;
1839         chip->c_dma.enable = sbus_dma_enable;
1840         chip->c_dma.request = sbus_dma_request;
1841         chip->c_dma.address = sbus_dma_addr;
1842 
1843         if (request_irq(op->archdata.irqs[0], snd_cs4231_sbus_interrupt,
1844                         IRQF_SHARED, "cs4231", chip)) {
1845                 snd_printdd("cs4231-%d: Unable to grab SBUS IRQ %d\n",
1846                             dev, op->archdata.irqs[0]);
1847                 snd_cs4231_sbus_free(chip);
1848                 return -EBUSY;
1849         }
1850         chip->irq[0] = op->archdata.irqs[0];
1851 
1852         if (snd_cs4231_probe(chip) < 0) {
1853                 snd_cs4231_sbus_free(chip);
1854                 return -ENODEV;
1855         }
1856         snd_cs4231_init(chip);
1857 
1858         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
1859                                   chip, &snd_cs4231_sbus_dev_ops)) < 0) {
1860                 snd_cs4231_sbus_free(chip);
1861                 return err;
1862         }
1863 
1864         return 0;
1865 }
1866 
1867 static int cs4231_sbus_probe(struct platform_device *op)
1868 {
1869         struct resource *rp = &op->resource[0];
1870         struct snd_card *card;
1871         int err;
1872 
1873         err = cs4231_attach_begin(op, &card);
1874         if (err)
1875                 return err;
1876 
1877         sprintf(card->longname, "%s at 0x%02lx:0x%016Lx, irq %d",
1878                 card->shortname,
1879                 rp->flags & 0xffL,
1880                 (unsigned long long)rp->start,
1881                 op->archdata.irqs[0]);
1882 
1883         err = snd_cs4231_sbus_create(card, op, dev);
1884         if (err < 0) {
1885                 snd_card_free(card);
1886                 return err;
1887         }
1888 
1889         return cs4231_attach_finish(card);
1890 }
1891 #endif
1892 
1893 #ifdef EBUS_SUPPORT
1894 
1895 static void snd_cs4231_ebus_play_callback(struct ebus_dma_info *p, int event,
1896                                           void *cookie)
1897 {
1898         struct snd_cs4231 *chip = cookie;
1899 
1900         snd_cs4231_play_callback(chip);
1901 }
1902 
1903 static void snd_cs4231_ebus_capture_callback(struct ebus_dma_info *p,
1904                                              int event, void *cookie)
1905 {
1906         struct snd_cs4231 *chip = cookie;
1907 
1908         snd_cs4231_capture_callback(chip);
1909 }
1910 
1911 /*
1912  * EBUS DMA wrappers
1913  */
1914 
1915 static int _ebus_dma_request(struct cs4231_dma_control *dma_cont,
1916                              dma_addr_t bus_addr, size_t len)
1917 {
1918         return ebus_dma_request(&dma_cont->ebus_info, bus_addr, len);
1919 }
1920 
1921 static void _ebus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
1922 {
1923         ebus_dma_enable(&dma_cont->ebus_info, on);
1924 }
1925 
1926 static void _ebus_dma_prepare(struct cs4231_dma_control *dma_cont, int dir)
1927 {
1928         ebus_dma_prepare(&dma_cont->ebus_info, dir);
1929 }
1930 
1931 static unsigned int _ebus_dma_addr(struct cs4231_dma_control *dma_cont)
1932 {
1933         return ebus_dma_addr(&dma_cont->ebus_info);
1934 }
1935 
1936 /*
1937  * Init and exit routines
1938  */
1939 
1940 static int snd_cs4231_ebus_free(struct snd_cs4231 *chip)
1941 {
1942         struct platform_device *op = chip->op;
1943 
1944         if (chip->c_dma.ebus_info.regs) {
1945                 ebus_dma_unregister(&chip->c_dma.ebus_info);
1946                 of_iounmap(&op->resource[2], chip->c_dma.ebus_info.regs, 0x10);
1947         }
1948         if (chip->p_dma.ebus_info.regs) {
1949                 ebus_dma_unregister(&chip->p_dma.ebus_info);
1950                 of_iounmap(&op->resource[1], chip->p_dma.ebus_info.regs, 0x10);
1951         }
1952 
1953         if (chip->port)
1954                 of_iounmap(&op->resource[0], chip->port, 0x10);
1955 
1956         return 0;
1957 }
1958 
1959 static int snd_cs4231_ebus_dev_free(struct snd_device *device)
1960 {
1961         struct snd_cs4231 *cp = device->device_data;
1962 
1963         return snd_cs4231_ebus_free(cp);
1964 }
1965 
1966 static struct snd_device_ops snd_cs4231_ebus_dev_ops = {
1967         .dev_free       =       snd_cs4231_ebus_dev_free,
1968 };
1969 
1970 static int snd_cs4231_ebus_create(struct snd_card *card,
1971                                   struct platform_device *op,
1972                                   int dev)
1973 {
1974         struct snd_cs4231 *chip = card->private_data;
1975         int err;
1976 
1977         spin_lock_init(&chip->lock);
1978         spin_lock_init(&chip->c_dma.ebus_info.lock);
1979         spin_lock_init(&chip->p_dma.ebus_info.lock);
1980         mutex_init(&chip->mce_mutex);
1981         mutex_init(&chip->open_mutex);
1982         chip->flags |= CS4231_FLAG_EBUS;
1983         chip->op = op;
1984         memcpy(&chip->image, &snd_cs4231_original_image,
1985                sizeof(snd_cs4231_original_image));
1986         strcpy(chip->c_dma.ebus_info.name, "cs4231(capture)");
1987         chip->c_dma.ebus_info.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
1988         chip->c_dma.ebus_info.callback = snd_cs4231_ebus_capture_callback;
1989         chip->c_dma.ebus_info.client_cookie = chip;
1990         chip->c_dma.ebus_info.irq = op->archdata.irqs[0];
1991         strcpy(chip->p_dma.ebus_info.name, "cs4231(play)");
1992         chip->p_dma.ebus_info.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
1993         chip->p_dma.ebus_info.callback = snd_cs4231_ebus_play_callback;
1994         chip->p_dma.ebus_info.client_cookie = chip;
1995         chip->p_dma.ebus_info.irq = op->archdata.irqs[1];
1996 
1997         chip->p_dma.prepare = _ebus_dma_prepare;
1998         chip->p_dma.enable = _ebus_dma_enable;
1999         chip->p_dma.request = _ebus_dma_request;
2000         chip->p_dma.address = _ebus_dma_addr;
2001 
2002         chip->c_dma.prepare = _ebus_dma_prepare;
2003         chip->c_dma.enable = _ebus_dma_enable;
2004         chip->c_dma.request = _ebus_dma_request;
2005         chip->c_dma.address = _ebus_dma_addr;
2006 
2007         chip->port = of_ioremap(&op->resource[0], 0, 0x10, "cs4231");
2008         chip->p_dma.ebus_info.regs =
2009                 of_ioremap(&op->resource[1], 0, 0x10, "cs4231_pdma");
2010         chip->c_dma.ebus_info.regs =
2011                 of_ioremap(&op->resource[2], 0, 0x10, "cs4231_cdma");
2012         if (!chip->port || !chip->p_dma.ebus_info.regs ||
2013             !chip->c_dma.ebus_info.regs) {
2014                 snd_cs4231_ebus_free(chip);
2015                 snd_printdd("cs4231-%d: Unable to map chip registers.\n", dev);
2016                 return -EIO;
2017         }
2018 
2019         if (ebus_dma_register(&chip->c_dma.ebus_info)) {
2020                 snd_cs4231_ebus_free(chip);
2021                 snd_printdd("cs4231-%d: Unable to register EBUS capture DMA\n",
2022                             dev);
2023                 return -EBUSY;
2024         }
2025         if (ebus_dma_irq_enable(&chip->c_dma.ebus_info, 1)) {
2026                 snd_cs4231_ebus_free(chip);
2027                 snd_printdd("cs4231-%d: Unable to enable EBUS capture IRQ\n",
2028                             dev);
2029                 return -EBUSY;
2030         }
2031 
2032         if (ebus_dma_register(&chip->p_dma.ebus_info)) {
2033                 snd_cs4231_ebus_free(chip);
2034                 snd_printdd("cs4231-%d: Unable to register EBUS play DMA\n",
2035                             dev);
2036                 return -EBUSY;
2037         }
2038         if (ebus_dma_irq_enable(&chip->p_dma.ebus_info, 1)) {
2039                 snd_cs4231_ebus_free(chip);
2040                 snd_printdd("cs4231-%d: Unable to enable EBUS play IRQ\n", dev);
2041                 return -EBUSY;
2042         }
2043 
2044         if (snd_cs4231_probe(chip) < 0) {
2045                 snd_cs4231_ebus_free(chip);
2046                 return -ENODEV;
2047         }
2048         snd_cs4231_init(chip);
2049 
2050         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
2051                                   chip, &snd_cs4231_ebus_dev_ops)) < 0) {
2052                 snd_cs4231_ebus_free(chip);
2053                 return err;
2054         }
2055 
2056         return 0;
2057 }
2058 
2059 static int cs4231_ebus_probe(struct platform_device *op)
2060 {
2061         struct snd_card *card;
2062         int err;
2063 
2064         err = cs4231_attach_begin(op, &card);
2065         if (err)
2066                 return err;
2067 
2068         sprintf(card->longname, "%s at 0x%llx, irq %d",
2069                 card->shortname,
2070                 op->resource[0].start,
2071                 op->archdata.irqs[0]);
2072 
2073         err = snd_cs4231_ebus_create(card, op, dev);
2074         if (err < 0) {
2075                 snd_card_free(card);
2076                 return err;
2077         }
2078 
2079         return cs4231_attach_finish(card);
2080 }
2081 #endif
2082 
2083 static int cs4231_probe(struct platform_device *op)
2084 {
2085 #ifdef EBUS_SUPPORT
2086         if (!strcmp(op->dev.of_node->parent->name, "ebus"))
2087                 return cs4231_ebus_probe(op);
2088 #endif
2089 #ifdef SBUS_SUPPORT
2090         if (!strcmp(op->dev.of_node->parent->name, "sbus") ||
2091             !strcmp(op->dev.of_node->parent->name, "sbi"))
2092                 return cs4231_sbus_probe(op);
2093 #endif
2094         return -ENODEV;
2095 }
2096 
2097 static int cs4231_remove(struct platform_device *op)
2098 {
2099         struct snd_cs4231 *chip = dev_get_drvdata(&op->dev);
2100 
2101         snd_card_free(chip->card);
2102 
2103         return 0;
2104 }
2105 
2106 static const struct of_device_id cs4231_match[] = {
2107         {
2108                 .name = "SUNW,CS4231",
2109         },
2110         {
2111                 .name = "audio",
2112                 .compatible = "SUNW,CS4231",
2113         },
2114         {},
2115 };
2116 
2117 MODULE_DEVICE_TABLE(of, cs4231_match);
2118 
2119 static struct platform_driver cs4231_driver = {
2120         .driver = {
2121                 .name = "audio",
2122                 .owner = THIS_MODULE,
2123                 .of_match_table = cs4231_match,
2124         },
2125         .probe          = cs4231_probe,
2126         .remove         = cs4231_remove,
2127 };
2128 
2129 module_platform_driver(cs4231_driver);
2130 

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