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[linux.git] / sound / sparc / amd7930.c
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1da177e4
LT		 1/*
2 * Driver for AMD7930 sound chips found on Sparcs.
3 * Copyright (C) 2002 David S. Miller <[email protected]>
4 *
5 * Based entirely upon drivers/sbus/audio/amd7930.c which is:
6 * Copyright (C) 1996,1997 Thomas K. Dyas ([email protected])
7 *
8 * --- Notes from Thomas's original driver ---
9 * This is the lowlevel driver for the AMD7930 audio chip found on all
10 * sun4c machines and some sun4m machines.
11 *
12 * The amd7930 is actually an ISDN chip which has a very simple
13 * integrated audio encoder/decoder. When Sun decided on what chip to
14 * use for audio, they had the brilliant idea of using the amd7930 and
15 * only connecting the audio encoder/decoder pins.
16 *
17 * Thanks to the AMD engineer who was able to get us the AMD79C30
18 * databook which has all the programming information and gain tables.
19 *
20 * Advanced Micro Devices' Am79C30A is an ISDN/audio chip used in the
21 * SparcStation 1+. The chip provides microphone and speaker interfaces
22 * which provide mono-channel audio at 8K samples per second via either
23 * 8-bit A-law or 8-bit mu-law encoding. Also, the chip features an
24 * ISDN BRI Line Interface Unit (LIU), I.430 S/T physical interface,
25 * which performs basic D channel LAPD processing and provides raw
26 * B channel data. The digital audio channel, the two ISDN B channels,
27 * and two 64 Kbps channels to the microprocessor are all interconnected
28 * via a multiplexer.
29 * --- End of notes from Thoamas's original driver ---
30 */
31
32#include <linux/module.h>
33#include <linux/kernel.h>
34#include <linux/slab.h>
35#include <linux/init.h>
36#include <linux/interrupt.h>
37#include <linux/moduleparam.h>
38
39#include <sound/driver.h>
40#include <sound/core.h>
41#include <sound/pcm.h>
42#include <sound/info.h>
43#include <sound/control.h>
44#include <sound/initval.h>
45
46#include <asm/io.h>
47#include <asm/irq.h>
48#include <asm/sbus.h>
49
50static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
51static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
52static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
53
54module_param_array(index, int, NULL, 0444);
55MODULE_PARM_DESC(index, "Index value for Sun AMD7930 soundcard.");
56module_param_array(id, charp, NULL, 0444);
57MODULE_PARM_DESC(id, "ID string for Sun AMD7930 soundcard.");
58module_param_array(enable, bool, NULL, 0444);
59MODULE_PARM_DESC(enable, "Enable Sun AMD7930 soundcard.");
60MODULE_AUTHOR("Thomas K. Dyas and David S. Miller");
61MODULE_DESCRIPTION("Sun AMD7930");
62MODULE_LICENSE("GPL");
63MODULE_SUPPORTED_DEVICE("{{Sun,AMD7930}}");
64
65/* Device register layout. */
66
67/* Register interface presented to the CPU by the amd7930. */
68#define AMD7930_CR 0x00UL /* Command Register (W) */
69#define AMD7930_IR AMD7930_CR /* Interrupt Register (R) */
70#define AMD7930_DR 0x01UL /* Data Register (R/W) */
71#define AMD7930_DSR1 0x02UL /* D-channel Status Register 1 (R) */
72#define AMD7930_DER 0x03UL /* D-channel Error Register (R) */
73#define AMD7930_DCTB 0x04UL /* D-channel Transmit Buffer (W) */
74#define AMD7930_DCRB AMD7930_DCTB /* D-channel Receive Buffer (R) */
75#define AMD7930_BBTB 0x05UL /* Bb-channel Transmit Buffer (W) */
76#define AMD7930_BBRB AMD7930_BBTB /* Bb-channel Receive Buffer (R) */
77#define AMD7930_BCTB 0x06UL /* Bc-channel Transmit Buffer (W) */
78#define AMD7930_BCRB AMD7930_BCTB /* Bc-channel Receive Buffer (R) */
79#define AMD7930_DSR2 0x07UL /* D-channel Status Register 2 (R) */
80
81/* Indirect registers in the Main Audio Processor. */
82struct amd7930_map {
83 __u16 x[8];
84 __u16 r[8];
85 __u16 gx;
86 __u16 gr;
87 __u16 ger;
88 __u16 stgr;
89 __u16 ftgr;
90 __u16 atgr;
91 __u8 mmr1;
92 __u8 mmr2;
93};
94
95/* After an amd7930 interrupt, reading the Interrupt Register (ir)
96 * clears the interrupt and returns a bitmask indicating which
97 * interrupt source(s) require service.
98 */
99
100#define AMR_IR_DTTHRSH 0x01 /* D-channel xmit threshold */
101#define AMR_IR_DRTHRSH 0x02 /* D-channel recv threshold */
102#define AMR_IR_DSRI 0x04 /* D-channel packet status */
103#define AMR_IR_DERI 0x08 /* D-channel error */
104#define AMR_IR_BBUF 0x10 /* B-channel data xfer */
105#define AMR_IR_LSRI 0x20 /* LIU status */
106#define AMR_IR_DSR2I 0x40 /* D-channel buffer status */
107#define AMR_IR_MLTFRMI 0x80 /* multiframe or PP */
108
109/* The amd7930 has "indirect registers" which are accessed by writing
110 * the register number into the Command Register and then reading or
111 * writing values from the Data Register as appropriate. We define the
112 * AMR_* macros to be the indirect register numbers and AM_* macros to
113 * be bits in whatever register is referred to.
114 */
115
116/* Initialization */
117#define AMR_INIT 0x21
118#define AM_INIT_ACTIVE 0x01
119#define AM_INIT_DATAONLY 0x02
120#define AM_INIT_POWERDOWN 0x03
121#define AM_INIT_DISABLE_INTS 0x04
122#define AMR_INIT2 0x20
123#define AM_INIT2_ENABLE_POWERDOWN 0x20
124#define AM_INIT2_ENABLE_MULTIFRAME 0x10
125
126/* Line Interface Unit */
127#define AMR_LIU_LSR 0xA1
128#define AM_LIU_LSR_STATE 0x07
129#define AM_LIU_LSR_F3 0x08
130#define AM_LIU_LSR_F7 0x10
131#define AM_LIU_LSR_F8 0x20
132#define AM_LIU_LSR_HSW 0x40
133#define AM_LIU_LSR_HSW_CHG 0x80
134#define AMR_LIU_LPR 0xA2
135#define AMR_LIU_LMR1 0xA3
136#define AM_LIU_LMR1_B1_ENABL 0x01
137#define AM_LIU_LMR1_B2_ENABL 0x02
138#define AM_LIU_LMR1_F_DISABL 0x04
139#define AM_LIU_LMR1_FA_DISABL 0x08
140#define AM_LIU_LMR1_REQ_ACTIV 0x10
141#define AM_LIU_LMR1_F8_F3 0x20
142#define AM_LIU_LMR1_LIU_ENABL 0x40
143#define AMR_LIU_LMR2 0xA4
144#define AM_LIU_LMR2_DECHO 0x01
145#define AM_LIU_LMR2_DLOOP 0x02
146#define AM_LIU_LMR2_DBACKOFF 0x04
147#define AM_LIU_LMR2_EN_F3_INT 0x08
148#define AM_LIU_LMR2_EN_F8_INT 0x10
149#define AM_LIU_LMR2_EN_HSW_INT 0x20
150#define AM_LIU_LMR2_EN_F7_INT 0x40
151#define AMR_LIU_2_4 0xA5
152#define AMR_LIU_MF 0xA6
153#define AMR_LIU_MFSB 0xA7
154#define AMR_LIU_MFQB 0xA8
155
156/* Multiplexor */
157#define AMR_MUX_MCR1 0x41
158#define AMR_MUX_MCR2 0x42
159#define AMR_MUX_MCR3 0x43
160#define AM_MUX_CHANNEL_B1 0x01
161#define AM_MUX_CHANNEL_B2 0x02
162#define AM_MUX_CHANNEL_Ba 0x03
163#define AM_MUX_CHANNEL_Bb 0x04
164#define AM_MUX_CHANNEL_Bc 0x05
165#define AM_MUX_CHANNEL_Bd 0x06
166#define AM_MUX_CHANNEL_Be 0x07
167#define AM_MUX_CHANNEL_Bf 0x08
168#define AMR_MUX_MCR4 0x44
169#define AM_MUX_MCR4_ENABLE_INTS 0x08
170#define AM_MUX_MCR4_REVERSE_Bb 0x10
171#define AM_MUX_MCR4_REVERSE_Bc 0x20
172#define AMR_MUX_1_4 0x45
173
174/* Main Audio Processor */
175#define AMR_MAP_X 0x61
176#define AMR_MAP_R 0x62
177#define AMR_MAP_GX 0x63
178#define AMR_MAP_GR 0x64
179#define AMR_MAP_GER 0x65
180#define AMR_MAP_STGR 0x66
181#define AMR_MAP_FTGR_1_2 0x67
182#define AMR_MAP_ATGR_1_2 0x68
183#define AMR_MAP_MMR1 0x69
184#define AM_MAP_MMR1_ALAW 0x01
185#define AM_MAP_MMR1_GX 0x02
186#define AM_MAP_MMR1_GR 0x04
187#define AM_MAP_MMR1_GER 0x08
188#define AM_MAP_MMR1_X 0x10
189#define AM_MAP_MMR1_R 0x20
190#define AM_MAP_MMR1_STG 0x40
191#define AM_MAP_MMR1_LOOPBACK 0x80
192#define AMR_MAP_MMR2 0x6A
193#define AM_MAP_MMR2_AINB 0x01
194#define AM_MAP_MMR2_LS 0x02
195#define AM_MAP_MMR2_ENABLE_DTMF 0x04
196#define AM_MAP_MMR2_ENABLE_TONEGEN 0x08
197#define AM_MAP_MMR2_ENABLE_TONERING 0x10
198#define AM_MAP_MMR2_DISABLE_HIGHPASS 0x20
199#define AM_MAP_MMR2_DISABLE_AUTOZERO 0x40
200#define AMR_MAP_1_10 0x6B
201#define AMR_MAP_MMR3 0x6C
202#define AMR_MAP_STRA 0x6D
203#define AMR_MAP_STRF 0x6E
204#define AMR_MAP_PEAKX 0x70
205#define AMR_MAP_PEAKR 0x71
206#define AMR_MAP_15_16 0x72
207
208/* Data Link Controller */
209#define AMR_DLC_FRAR_1_2_3 0x81
210#define AMR_DLC_SRAR_1_2_3 0x82
211#define AMR_DLC_TAR 0x83
212#define AMR_DLC_DRLR 0x84
213#define AMR_DLC_DTCR 0x85
214#define AMR_DLC_DMR1 0x86
215#define AMR_DLC_DMR1_DTTHRSH_INT 0x01
216#define AMR_DLC_DMR1_DRTHRSH_INT 0x02
217#define AMR_DLC_DMR1_TAR_ENABL 0x04
218#define AMR_DLC_DMR1_EORP_INT 0x08
219#define AMR_DLC_DMR1_EN_ADDR1 0x10
220#define AMR_DLC_DMR1_EN_ADDR2 0x20
221#define AMR_DLC_DMR1_EN_ADDR3 0x40
222#define AMR_DLC_DMR1_EN_ADDR4 0x80
223#define AMR_DLC_DMR1_EN_ADDRS 0xf0
224#define AMR_DLC_DMR2 0x87
225#define AMR_DLC_DMR2_RABRT_INT 0x01
226#define AMR_DLC_DMR2_RESID_INT 0x02
227#define AMR_DLC_DMR2_COLL_INT 0x04
228#define AMR_DLC_DMR2_FCS_INT 0x08
229#define AMR_DLC_DMR2_OVFL_INT 0x10
230#define AMR_DLC_DMR2_UNFL_INT 0x20
231#define AMR_DLC_DMR2_OVRN_INT 0x40
232#define AMR_DLC_DMR2_UNRN_INT 0x80
233#define AMR_DLC_1_7 0x88
234#define AMR_DLC_DRCR 0x89
235#define AMR_DLC_RNGR1 0x8A
236#define AMR_DLC_RNGR2 0x8B
237#define AMR_DLC_FRAR4 0x8C
238#define AMR_DLC_SRAR4 0x8D
239#define AMR_DLC_DMR3 0x8E
240#define AMR_DLC_DMR3_VA_INT 0x01
241#define AMR_DLC_DMR3_EOTP_INT 0x02
242#define AMR_DLC_DMR3_LBRP_INT 0x04
243#define AMR_DLC_DMR3_RBA_INT 0x08
244#define AMR_DLC_DMR3_LBT_INT 0x10
245#define AMR_DLC_DMR3_TBE_INT 0x20
246#define AMR_DLC_DMR3_RPLOST_INT 0x40
247#define AMR_DLC_DMR3_KEEP_FCS 0x80
248#define AMR_DLC_DMR4 0x8F
249#define AMR_DLC_DMR4_RCV_1 0x00
250#define AMR_DLC_DMR4_RCV_2 0x01
251#define AMR_DLC_DMR4_RCV_4 0x02
252#define AMR_DLC_DMR4_RCV_8 0x03
253#define AMR_DLC_DMR4_RCV_16 0x01
254#define AMR_DLC_DMR4_RCV_24 0x02
255#define AMR_DLC_DMR4_RCV_30 0x03
256#define AMR_DLC_DMR4_XMT_1 0x00
257#define AMR_DLC_DMR4_XMT_2 0x04
258#define AMR_DLC_DMR4_XMT_4 0x08
259#define AMR_DLC_DMR4_XMT_8 0x0c
260#define AMR_DLC_DMR4_XMT_10 0x08
261#define AMR_DLC_DMR4_XMT_14 0x0c
262#define AMR_DLC_DMR4_IDLE_MARK 0x00
263#define AMR_DLC_DMR4_IDLE_FLAG 0x10
264#define AMR_DLC_DMR4_ADDR_BOTH 0x00
265#define AMR_DLC_DMR4_ADDR_1ST 0x20
266#define AMR_DLC_DMR4_ADDR_2ND 0xa0
267#define AMR_DLC_DMR4_CR_ENABLE 0x40
268#define AMR_DLC_12_15 0x90
269#define AMR_DLC_ASR 0x91
270#define AMR_DLC_EFCR 0x92
271#define AMR_DLC_EFCR_EXTEND_FIFO 0x01
272#define AMR_DLC_EFCR_SEC_PKT_INT 0x02
273
274#define AMR_DSR1_VADDR 0x01
275#define AMR_DSR1_EORP 0x02
276#define AMR_DSR1_PKT_IP 0x04
277#define AMR_DSR1_DECHO_ON 0x08
278#define AMR_DSR1_DLOOP_ON 0x10
279#define AMR_DSR1_DBACK_OFF 0x20
280#define AMR_DSR1_EOTP 0x40
281#define AMR_DSR1_CXMT_ABRT 0x80
282
283#define AMR_DSR2_LBRP 0x01
284#define AMR_DSR2_RBA 0x02
285#define AMR_DSR2_RPLOST 0x04
286#define AMR_DSR2_LAST_BYTE 0x08
287#define AMR_DSR2_TBE 0x10
288#define AMR_DSR2_MARK_IDLE 0x20
289#define AMR_DSR2_FLAG_IDLE 0x40
290#define AMR_DSR2_SECOND_PKT 0x80
291
292#define AMR_DER_RABRT 0x01
293#define AMR_DER_RFRAME 0x02
294#define AMR_DER_COLLISION 0x04
295#define AMR_DER_FCS 0x08
296#define AMR_DER_OVFL 0x10
297#define AMR_DER_UNFL 0x20
298#define AMR_DER_OVRN 0x40
299#define AMR_DER_UNRN 0x80
300
301/* Peripheral Port */
302#define AMR_PP_PPCR1 0xC0
303#define AMR_PP_PPSR 0xC1
304#define AMR_PP_PPIER 0xC2
305#define AMR_PP_MTDR 0xC3
306#define AMR_PP_MRDR 0xC3
307#define AMR_PP_CITDR0 0xC4
308#define AMR_PP_CIRDR0 0xC4
309#define AMR_PP_CITDR1 0xC5
310#define AMR_PP_CIRDR1 0xC5
311#define AMR_PP_PPCR2 0xC8
312#define AMR_PP_PPCR3 0xC9
313
314typedef struct snd_amd7930 {
315 spinlock_t lock;
316 void __iomem *regs;
317 u32 flags;
318#define AMD7930_FLAG_PLAYBACK 0x00000001
319#define AMD7930_FLAG_CAPTURE 0x00000002
320
321 struct amd7930_map map;
322
323 snd_card_t *card;
324 snd_pcm_t *pcm;
325 snd_pcm_substream_t *playback_substream;
326 snd_pcm_substream_t *capture_substream;
327
328 /* Playback/Capture buffer state. */
329 unsigned char *p_orig, *p_cur;
330 int p_left;
331 unsigned char *c_orig, *c_cur;
332 int c_left;
333
334 int rgain;
335 int pgain;
336 int mgain;
337
338 struct sbus_dev *sdev;
339 unsigned int irq;
340 unsigned int regs_size;
341 struct snd_amd7930 *next;
342} amd7930_t;
343
344static amd7930_t *amd7930_list;
345
346/* Idle the AMD7930 chip. The amd->lock is not held. */
347static __inline__ void amd7930_idle(amd7930_t *amd)
348{
349 unsigned long flags;
350
351 spin_lock_irqsave(&amd->lock, flags);
352 sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
353 sbus_writeb(0, amd->regs + AMD7930_DR);
354 spin_unlock_irqrestore(&amd->lock, flags);
355}
356
357/* Enable chip interrupts. The amd->lock is not held. */
358static __inline__ void amd7930_enable_ints(amd7930_t *amd)
359{
360 unsigned long flags;
361
362 spin_lock_irqsave(&amd->lock, flags);
363 sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
364 sbus_writeb(AM_INIT_ACTIVE, amd->regs + AMD7930_DR);
365 spin_unlock_irqrestore(&amd->lock, flags);
366}
367
368/* Disable chip interrupts. The amd->lock is not held. */
369static __inline__ void amd7930_disable_ints(amd7930_t *amd)
370{
371 unsigned long flags;
372
373 spin_lock_irqsave(&amd->lock, flags);
374 sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
375 sbus_writeb(AM_INIT_ACTIVE | AM_INIT_DISABLE_INTS, amd->regs + AMD7930_DR);
376 spin_unlock_irqrestore(&amd->lock, flags);
377}
378
379/* Commit amd7930_map settings to the hardware.
380 * The amd->lock is held and local interrupts are disabled.
381 */
382static void __amd7930_write_map(amd7930_t *amd)
383{
384 struct amd7930_map *map = &amd->map;
385
386 sbus_writeb(AMR_MAP_GX, amd->regs + AMD7930_CR);
387 sbus_writeb(((map->gx >> 0) & 0xff), amd->regs + AMD7930_DR);
388 sbus_writeb(((map->gx >> 8) & 0xff), amd->regs + AMD7930_DR);
389
390 sbus_writeb(AMR_MAP_GR, amd->regs + AMD7930_CR);
391 sbus_writeb(((map->gr >> 0) & 0xff), amd->regs + AMD7930_DR);
392 sbus_writeb(((map->gr >> 8) & 0xff), amd->regs + AMD7930_DR);
393
394 sbus_writeb(AMR_MAP_STGR, amd->regs + AMD7930_CR);
395 sbus_writeb(((map->stgr >> 0) & 0xff), amd->regs + AMD7930_DR);
396 sbus_writeb(((map->stgr >> 8) & 0xff), amd->regs + AMD7930_DR);
397
398 sbus_writeb(AMR_MAP_GER, amd->regs + AMD7930_CR);
399 sbus_writeb(((map->ger >> 0) & 0xff), amd->regs + AMD7930_DR);
400 sbus_writeb(((map->ger >> 8) & 0xff), amd->regs + AMD7930_DR);
401
402 sbus_writeb(AMR_MAP_MMR1, amd->regs + AMD7930_CR);
403 sbus_writeb(map->mmr1, amd->regs + AMD7930_DR);
404
405 sbus_writeb(AMR_MAP_MMR2, amd->regs + AMD7930_CR);
406 sbus_writeb(map->mmr2, amd->regs + AMD7930_DR);
407}
408
409/* gx, gr & stg gains. this table must contain 256 elements with
410 * the 0th being "infinity" (the magic value 9008). The remaining
411 * elements match sun's gain curve (but with higher resolution):
412 * -18 to 0dB in .16dB steps then 0 to 12dB in .08dB steps.
413 */
414static __const__ __u16 gx_coeff[256] = {
415 0x9008, 0x8b7c, 0x8b51, 0x8b45, 0x8b42, 0x8b3b, 0x8b36, 0x8b33,
416 0x8b32, 0x8b2a, 0x8b2b, 0x8b2c, 0x8b25, 0x8b23, 0x8b22, 0x8b22,
417 0x9122, 0x8b1a, 0x8aa3, 0x8aa3, 0x8b1c, 0x8aa6, 0x912d, 0x912b,
418 0x8aab, 0x8b12, 0x8aaa, 0x8ab2, 0x9132, 0x8ab4, 0x913c, 0x8abb,
419 0x9142, 0x9144, 0x9151, 0x8ad5, 0x8aeb, 0x8a79, 0x8a5a, 0x8a4a,
420 0x8b03, 0x91c2, 0x91bb, 0x8a3f, 0x8a33, 0x91b2, 0x9212, 0x9213,
421 0x8a2c, 0x921d, 0x8a23, 0x921a, 0x9222, 0x9223, 0x922d, 0x9231,
422 0x9234, 0x9242, 0x925b, 0x92dd, 0x92c1, 0x92b3, 0x92ab, 0x92a4,
423 0x92a2, 0x932b, 0x9341, 0x93d3, 0x93b2, 0x93a2, 0x943c, 0x94b2,
424 0x953a, 0x9653, 0x9782, 0x9e21, 0x9d23, 0x9cd2, 0x9c23, 0x9baa,
425 0x9bde, 0x9b33, 0x9b22, 0x9b1d, 0x9ab2, 0xa142, 0xa1e5, 0x9a3b,
426 0xa213, 0xa1a2, 0xa231, 0xa2eb, 0xa313, 0xa334, 0xa421, 0xa54b,
427 0xada4, 0xac23, 0xab3b, 0xaaab, 0xaa5c, 0xb1a3, 0xb2ca, 0xb3bd,
428 0xbe24, 0xbb2b, 0xba33, 0xc32b, 0xcb5a, 0xd2a2, 0xe31d, 0x0808,
429 0x72ba, 0x62c2, 0x5c32, 0x52db, 0x513e, 0x4cce, 0x43b2, 0x4243,
430 0x41b4, 0x3b12, 0x3bc3, 0x3df2, 0x34bd, 0x3334, 0x32c2, 0x3224,
431 0x31aa, 0x2a7b, 0x2aaa, 0x2b23, 0x2bba, 0x2c42, 0x2e23, 0x25bb,
432 0x242b, 0x240f, 0x231a, 0x22bb, 0x2241, 0x2223, 0x221f, 0x1a33,
433 0x1a4a, 0x1acd, 0x2132, 0x1b1b, 0x1b2c, 0x1b62, 0x1c12, 0x1c32,
434 0x1d1b, 0x1e71, 0x16b1, 0x1522, 0x1434, 0x1412, 0x1352, 0x1323,
435 0x1315, 0x12bc, 0x127a, 0x1235, 0x1226, 0x11a2, 0x1216, 0x0a2a,
436 0x11bc, 0x11d1, 0x1163, 0x0ac2, 0x0ab2, 0x0aab, 0x0b1b, 0x0b23,
437 0x0b33, 0x0c0f, 0x0bb3, 0x0c1b, 0x0c3e, 0x0cb1, 0x0d4c, 0x0ec1,
438 0x079a, 0x0614, 0x0521, 0x047c, 0x0422, 0x03b1, 0x03e3, 0x0333,
439 0x0322, 0x031c, 0x02aa, 0x02ba, 0x02f2, 0x0242, 0x0232, 0x0227,
440 0x0222, 0x021b, 0x01ad, 0x0212, 0x01b2, 0x01bb, 0x01cb, 0x01f6,
441 0x0152, 0x013a, 0x0133, 0x0131, 0x012c, 0x0123, 0x0122, 0x00a2,
442 0x011b, 0x011e, 0x0114, 0x00b1, 0x00aa, 0x00b3, 0x00bd, 0x00ba,
443 0x00c5, 0x00d3, 0x00f3, 0x0062, 0x0051, 0x0042, 0x003b, 0x0033,
444 0x0032, 0x002a, 0x002c, 0x0025, 0x0023, 0x0022, 0x001a, 0x0021,
445 0x001b, 0x001b, 0x001d, 0x0015, 0x0013, 0x0013, 0x0012, 0x0012,
446 0x000a, 0x000a, 0x0011, 0x0011, 0x000b, 0x000b, 0x000c, 0x000e,
447};
448
449static __const__ __u16 ger_coeff[] = {
450 0x431f, /* 5. dB */
451 0x331f, /* 5.5 dB */
452 0x40dd, /* 6. dB */
453 0x11dd, /* 6.5 dB */
454 0x440f, /* 7. dB */
455 0x411f, /* 7.5 dB */
456 0x311f, /* 8. dB */
457 0x5520, /* 8.5 dB */
458 0x10dd, /* 9. dB */
459 0x4211, /* 9.5 dB */
460 0x410f, /* 10. dB */
461 0x111f, /* 10.5 dB */
462 0x600b, /* 11. dB */
463 0x00dd, /* 11.5 dB */
464 0x4210, /* 12. dB */
465 0x110f, /* 13. dB */
466 0x7200, /* 14. dB */
467 0x2110, /* 15. dB */
468 0x2200, /* 15.9 dB */
469 0x000b, /* 16.9 dB */
470 0x000f /* 18. dB */
471};
472
473/* Update amd7930_map settings and program them into the hardware.
474 * The amd->lock is held and local interrupts are disabled.
475 */
476static void __amd7930_update_map(amd7930_t *amd)
477{
478 struct amd7930_map *map = &amd->map;
479 int level;
480
481 map->gx = gx_coeff[amd->rgain];
482 map->stgr = gx_coeff[amd->mgain];
483 level = (amd->pgain * (256 + ARRAY_SIZE(ger_coeff))) >> 8;
484 if (level >= 256) {
485 map->ger = ger_coeff[level - 256];
486 map->gr = gx_coeff[255];
487 } else {
488 map->ger = ger_coeff[0];
489 map->gr = gx_coeff[level];
490 }
491 __amd7930_write_map(amd);
492}
493
494static irqreturn_t snd_amd7930_interrupt(int irq, void *dev_id, struct pt_regs *regs)
495{
496 amd7930_t *amd = dev_id;
497 unsigned int elapsed;
498 u8 ir;
499
500 spin_lock(&amd->lock);
501
502 elapsed = 0;
503
504 ir = sbus_readb(amd->regs + AMD7930_IR);
505 if (ir & AMR_IR_BBUF) {
506 u8 byte;
507
508 if (amd->flags & AMD7930_FLAG_PLAYBACK) {
509 if (amd->p_left > 0) {
510 byte = *(amd->p_cur++);
511 amd->p_left--;
512 sbus_writeb(byte, amd->regs + AMD7930_BBTB);
513 if (amd->p_left == 0)
514 elapsed |= AMD7930_FLAG_PLAYBACK;
515 } else
516 sbus_writeb(0, amd->regs + AMD7930_BBTB);
517 } else if (amd->flags & AMD7930_FLAG_CAPTURE) {
518 byte = sbus_readb(amd->regs + AMD7930_BBRB);
519 if (amd->c_left > 0) {
520 *(amd->c_cur++) = byte;
521 amd->c_left--;
522 if (amd->c_left == 0)
523 elapsed |= AMD7930_FLAG_CAPTURE;
524 }
525 }
526 }
527 spin_unlock(&amd->lock);
528
529 if (elapsed & AMD7930_FLAG_PLAYBACK)
530 snd_pcm_period_elapsed(amd->playback_substream);
531 else
532 snd_pcm_period_elapsed(amd->capture_substream);
533
534 return IRQ_HANDLED;
535}
536
537static int snd_amd7930_trigger(amd7930_t *amd, unsigned int flag, int cmd)
538{
539 unsigned long flags;
540 int result = 0;
541
542 spin_lock_irqsave(&amd->lock, flags);
543 if (cmd == SNDRV_PCM_TRIGGER_START) {
544 if (!(amd->flags & flag)) {
545 amd->flags |= flag;
546
547 /* Enable B channel interrupts. */
548 sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
549 sbus_writeb(AM_MUX_MCR4_ENABLE_INTS, amd->regs + AMD7930_DR);
550 }
551 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
552 if (amd->flags & flag) {
553 amd->flags &= ~flag;
554
555 /* Disable B channel interrupts. */
556 sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
557 sbus_writeb(0, amd->regs + AMD7930_DR);
558 }
559 } else {
560 result = -EINVAL;
561 }
562 spin_unlock_irqrestore(&amd->lock, flags);
563
564 return result;
565}
566
567static int snd_amd7930_playback_trigger(snd_pcm_substream_t * substream,
568 int cmd)
569{
570 amd7930_t *amd = snd_pcm_substream_chip(substream);
571 return snd_amd7930_trigger(amd, AMD7930_FLAG_PLAYBACK, cmd);
572}
573
574static int snd_amd7930_capture_trigger(snd_pcm_substream_t * substream,
575 int cmd)
576{
577 amd7930_t *amd = snd_pcm_substream_chip(substream);
578 return snd_amd7930_trigger(amd, AMD7930_FLAG_CAPTURE, cmd);
579}
580
581static int snd_amd7930_playback_prepare(snd_pcm_substream_t * substream)
582{
583 amd7930_t *amd = snd_pcm_substream_chip(substream);
584 snd_pcm_runtime_t *runtime = substream->runtime;
585 unsigned int size = snd_pcm_lib_buffer_bytes(substream);
586 unsigned long flags;
587 u8 new_mmr1;
588
589 spin_lock_irqsave(&amd->lock, flags);
590
591 amd->flags |= AMD7930_FLAG_PLAYBACK;
592
593 /* Setup the pseudo-dma transfer pointers. */
594 amd->p_orig = amd->p_cur = runtime->dma_area;
595 amd->p_left = size;
596
597 /* Put the chip into the correct encoding format. */
598 new_mmr1 = amd->map.mmr1;
599 if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
600 new_mmr1 |= AM_MAP_MMR1_ALAW;
601 else
602 new_mmr1 &= ~AM_MAP_MMR1_ALAW;
603 if (new_mmr1 != amd->map.mmr1) {
604 amd->map.mmr1 = new_mmr1;
605 __amd7930_update_map(amd);
606 }
607
608 spin_unlock_irqrestore(&amd->lock, flags);
609
610 return 0;
611}
612
613static int snd_amd7930_capture_prepare(snd_pcm_substream_t * substream)
614{
615 amd7930_t *amd = snd_pcm_substream_chip(substream);
616 snd_pcm_runtime_t *runtime = substream->runtime;
617 unsigned int size = snd_pcm_lib_buffer_bytes(substream);
618 unsigned long flags;
619 u8 new_mmr1;
620
621 spin_lock_irqsave(&amd->lock, flags);
622
623 amd->flags |= AMD7930_FLAG_CAPTURE;
624
625 /* Setup the pseudo-dma transfer pointers. */
626 amd->c_orig = amd->c_cur = runtime->dma_area;
627 amd->c_left = size;
628
629 /* Put the chip into the correct encoding format. */
630 new_mmr1 = amd->map.mmr1;
631 if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
632 new_mmr1 |= AM_MAP_MMR1_ALAW;
633 else
634 new_mmr1 &= ~AM_MAP_MMR1_ALAW;
635 if (new_mmr1 != amd->map.mmr1) {
636 amd->map.mmr1 = new_mmr1;
637 __amd7930_update_map(amd);
638 }
639
640 spin_unlock_irqrestore(&amd->lock, flags);
641
642 return 0;
643}
644
645static snd_pcm_uframes_t snd_amd7930_playback_pointer(snd_pcm_substream_t * substream)
646{
647 amd7930_t *amd = snd_pcm_substream_chip(substream);
648 size_t ptr;
649
650 if (!(amd->flags & AMD7930_FLAG_PLAYBACK))
651 return 0;
652 ptr = amd->p_cur - amd->p_orig;
653 return bytes_to_frames(substream->runtime, ptr);
654}
655
656static snd_pcm_uframes_t snd_amd7930_capture_pointer(snd_pcm_substream_t * substream)
657{
658 amd7930_t *amd = snd_pcm_substream_chip(substream);
659 size_t ptr;
660
661 if (!(amd->flags & AMD7930_FLAG_CAPTURE))
662 return 0;
663
664 ptr = amd->c_cur - amd->c_orig;
665 return bytes_to_frames(substream->runtime, ptr);
666}
667
668/* Playback and capture have identical properties. */
669static snd_pcm_hardware_t snd_amd7930_pcm_hw =
670{
671 .info = (SNDRV_PCM_INFO_MMAP |
672 SNDRV_PCM_INFO_MMAP_VALID |
673 SNDRV_PCM_INFO_INTERLEAVED |
674 SNDRV_PCM_INFO_BLOCK_TRANSFER |
675 SNDRV_PCM_INFO_HALF_DUPLEX),
676 .formats = SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
677 .rates = SNDRV_PCM_RATE_8000,
678 .rate_min = 8000,
679 .rate_max = 8000,
680 .channels_min = 1,
681 .channels_max = 1,
682 .buffer_bytes_max = (64*1024),
683 .period_bytes_min = 1,
684 .period_bytes_max = (64*1024),
685 .periods_min = 1,
686 .periods_max = 1024,
687};
688
689static int snd_amd7930_playback_open(snd_pcm_substream_t * substream)
690{
691 amd7930_t *amd = snd_pcm_substream_chip(substream);
692 snd_pcm_runtime_t *runtime = substream->runtime;
693
694 amd->playback_substream = substream;
695 runtime->hw = snd_amd7930_pcm_hw;
696 return 0;
697}
698
699static int snd_amd7930_capture_open(snd_pcm_substream_t * substream)
700{
701 amd7930_t *amd = snd_pcm_substream_chip(substream);
702 snd_pcm_runtime_t *runtime = substream->runtime;
703
704 amd->capture_substream = substream;
705 runtime->hw = snd_amd7930_pcm_hw;
706 return 0;
707}
708
709static int snd_amd7930_playback_close(snd_pcm_substream_t * substream)
710{
711 amd7930_t *amd = snd_pcm_substream_chip(substream);
712
713 amd->playback_substream = NULL;
714 return 0;
715}
716
717static int snd_amd7930_capture_close(snd_pcm_substream_t * substream)
718{
719 amd7930_t *amd = snd_pcm_substream_chip(substream);
720
721 amd->capture_substream = NULL;
722 return 0;
723}
724
725static int snd_amd7930_hw_params(snd_pcm_substream_t * substream,
726 snd_pcm_hw_params_t * hw_params)
727{
728 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
729}
730
731static int snd_amd7930_hw_free(snd_pcm_substream_t * substream)
732{
733 return snd_pcm_lib_free_pages(substream);
734}
735
736static snd_pcm_ops_t snd_amd7930_playback_ops = {
737 .open = snd_amd7930_playback_open,
738 .close = snd_amd7930_playback_close,
739 .ioctl = snd_pcm_lib_ioctl,
740 .hw_params = snd_amd7930_hw_params,
741 .hw_free = snd_amd7930_hw_free,
742 .prepare = snd_amd7930_playback_prepare,
743 .trigger = snd_amd7930_playback_trigger,
744 .pointer = snd_amd7930_playback_pointer,
745};
746
747static snd_pcm_ops_t snd_amd7930_capture_ops = {
748 .open = snd_amd7930_capture_open,
749 .close = snd_amd7930_capture_close,
750 .ioctl = snd_pcm_lib_ioctl,
751 .hw_params = snd_amd7930_hw_params,
752 .hw_free = snd_amd7930_hw_free,
753 .prepare = snd_amd7930_capture_prepare,
754 .trigger = snd_amd7930_capture_trigger,
755 .pointer = snd_amd7930_capture_pointer,
756};
757
758static void snd_amd7930_pcm_free(snd_pcm_t *pcm)
759{
760 amd7930_t *amd = pcm->private_data;
761
762 amd->pcm = NULL;
763 snd_pcm_lib_preallocate_free_for_all(pcm);
764}
765
766static int __init snd_amd7930_pcm(amd7930_t *amd)
767{
768 snd_pcm_t *pcm;
769 int err;
770
771 if ((err = snd_pcm_new(amd->card,
772 /* ID */ "sun_amd7930",
773 /* device */ 0,
774 /* playback count */ 1,
775 /* capture count */ 1, &pcm)) < 0)
776 return err;
777 snd_assert(pcm != NULL, return -EINVAL);
778
779 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_amd7930_playback_ops);
780 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_amd7930_capture_ops);
781
782 pcm->private_data = amd;
783 pcm->private_free = snd_amd7930_pcm_free;
784 pcm->info_flags = 0;
785 strcpy(pcm->name, amd->card->shortname);
786 amd->pcm = pcm;
787
788 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
789 snd_dma_continuous_data(GFP_KERNEL),
790 64*1024, 64*1024);
791
792 return 0;
793}
794
795#define VOLUME_MONITOR 0
796#define VOLUME_CAPTURE 1
797#define VOLUME_PLAYBACK 2
798
799static int snd_amd7930_info_volume(snd_kcontrol_t *kctl, snd_ctl_elem_info_t *uinfo)
800{
801 int type = kctl->private_value;
802
803 snd_assert(type == VOLUME_MONITOR ||
804 type == VOLUME_CAPTURE ||
805 type == VOLUME_PLAYBACK, return -EINVAL);
806 (void) type;
807
808 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
809 uinfo->count = 1;
810 uinfo->value.integer.min = 0;
811 uinfo->value.integer.max = 255;
812
813 return 0;
814}
815
816static int snd_amd7930_get_volume(snd_kcontrol_t *kctl, snd_ctl_elem_value_t *ucontrol)
817{
818 amd7930_t *amd = snd_kcontrol_chip(kctl);
819 int type = kctl->private_value;
820 int *swval;
821
822 snd_assert(type == VOLUME_MONITOR ||
823 type == VOLUME_CAPTURE ||
824 type == VOLUME_PLAYBACK, return -EINVAL);
825
826 switch (type) {
827 case VOLUME_MONITOR:
828 swval = &amd->mgain;
829 break;
830 case VOLUME_CAPTURE:
831 swval = &amd->rgain;
832 break;
833 case VOLUME_PLAYBACK:
834 default:
835 swval = &amd->pgain;
836 break;
837 };
838
839 ucontrol->value.integer.value[0] = *swval;
840
841 return 0;
842}
843
844static int snd_amd7930_put_volume(snd_kcontrol_t *kctl, snd_ctl_elem_value_t *ucontrol)
845{
846 amd7930_t *amd = snd_kcontrol_chip(kctl);
847 unsigned long flags;
848 int type = kctl->private_value;
849 int *swval, change;
850
851 snd_assert(type == VOLUME_MONITOR ||
852 type == VOLUME_CAPTURE ||
853 type == VOLUME_PLAYBACK, return -EINVAL);
854
855 switch (type) {
856 case VOLUME_MONITOR:
857 swval = &amd->mgain;
858 break;
859 case VOLUME_CAPTURE:
860 swval = &amd->rgain;
861 break;
862 case VOLUME_PLAYBACK:
863 default:
864 swval = &amd->pgain;
865 break;
866 };
867
868 spin_lock_irqsave(&amd->lock, flags);
869
870 if (*swval != ucontrol->value.integer.value[0]) {
871 *swval = ucontrol->value.integer.value[0];
872 __amd7930_update_map(amd);
873 change = 1;
874 } else
875 change = 0;
876
877 spin_unlock_irqrestore(&amd->lock, flags);
878
879 return change;
880}
881
882static snd_kcontrol_new_t amd7930_controls[] __initdata = {
883 {
884 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
885 .name = "Monitor Volume",
886 .index = 0,
887 .info = snd_amd7930_info_volume,
888 .get = snd_amd7930_get_volume,
889 .put = snd_amd7930_put_volume,
890 .private_value = VOLUME_MONITOR,
891 },
892 {
893 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
894 .name = "Capture Volume",
895 .index = 0,
896 .info = snd_amd7930_info_volume,
897 .get = snd_amd7930_get_volume,
898 .put = snd_amd7930_put_volume,
899 .private_value = VOLUME_CAPTURE,
900 },
901 {
902 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
903 .name = "Playback Volume",
904 .index = 0,
905 .info = snd_amd7930_info_volume,
906 .get = snd_amd7930_get_volume,
907 .put = snd_amd7930_put_volume,
908 .private_value = VOLUME_PLAYBACK,
909 },
910};
911
912static int __init snd_amd7930_mixer(amd7930_t *amd)
913{
914 snd_card_t *card;
915 int idx, err;
916
917 snd_assert(amd != NULL && amd->card != NULL, return -EINVAL);
918
919 card = amd->card;
920 strcpy(card->mixername, card->shortname);
921
922 for (idx = 0; idx < ARRAY_SIZE(amd7930_controls); idx++) {
923 if ((err = snd_ctl_add(card,
924 snd_ctl_new1(&amd7930_controls[idx], amd))) < 0)
925 return err;
926 }
927
928 return 0;
929}
930
931static int snd_amd7930_free(amd7930_t *amd)
932{
933 amd7930_idle(amd);
934
935 if (amd->irq)
936 free_irq(amd->irq, amd);
937
938 if (amd->regs)
939 sbus_iounmap(amd->regs, amd->regs_size);
940
941 kfree(amd);
942
943 return 0;
944}
945
946static int snd_amd7930_dev_free(snd_device_t *device)
947{
948 amd7930_t *amd = device->device_data;
949
950 return snd_amd7930_free(amd);
951}
952
953static snd_device_ops_t snd_amd7930_dev_ops = {
954 .dev_free = snd_amd7930_dev_free,
955};
956
957static int __init snd_amd7930_create(snd_card_t *card,
958 struct sbus_dev *sdev,
959 struct resource *rp,
960 unsigned int reg_size,
961 struct linux_prom_irqs *irq_prop,
962 int dev,
963 amd7930_t **ramd)
964{
965 unsigned long flags;
966 amd7930_t *amd;
967 int err;
968
969 *ramd = NULL;
561b220a 970 amd = kzalloc(sizeof(*amd), GFP_KERNEL);
1da177e4
LT		 971 if (amd == NULL)
972 return -ENOMEM;
973
974 spin_lock_init(&amd->lock);
975 amd->card = card;
976 amd->sdev = sdev;
977 amd->regs_size = reg_size;
978
979 amd->regs = sbus_ioremap(rp, 0, amd->regs_size, "amd7930");
980 if (!amd->regs) {
981 snd_printk("amd7930-%d: Unable to map chip registers.\n", dev);
982 return -EIO;
983 }
984
985 amd7930_idle(amd);
986
987 if (request_irq(irq_prop->pri, snd_amd7930_interrupt,
988 SA_INTERRUPT | SA_SHIRQ, "amd7930", amd)) {
989 snd_printk("amd7930-%d: Unable to grab IRQ %s\n",
990 dev,
991 __irq_itoa(irq_prop->pri));
992 snd_amd7930_free(amd);
993 return -EBUSY;
994 }
995 amd->irq = irq_prop->pri;
996
997 amd7930_enable_ints(amd);
998
999 spin_lock_irqsave(&amd->lock, flags);
1000
1001 amd->rgain = 128;
1002 amd->pgain = 200;
1003 amd->mgain = 0;
1004
1005 memset(&amd->map, 0, sizeof(amd->map));
1006 amd->map.mmr1 = (AM_MAP_MMR1_GX | AM_MAP_MMR1_GER |
1007 AM_MAP_MMR1_GR | AM_MAP_MMR1_STG);
1008 amd->map.mmr2 = (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB);
1009
1010 __amd7930_update_map(amd);
1011
1012 /* Always MUX audio (Ba) to channel Bb. */
1013 sbus_writeb(AMR_MUX_MCR1, amd->regs + AMD7930_CR);
1014 sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4),
1015 amd->regs + AMD7930_DR);
1016
1017 spin_unlock_irqrestore(&amd->lock, flags);
1018
1019 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
1020 amd, &snd_amd7930_dev_ops)) < 0) {
1021 snd_amd7930_free(amd);
1022 return err;
1023 }
1024
1025 *ramd = amd;
1026 return 0;
1027}
1028
1029static int __init amd7930_attach(int prom_node, struct sbus_dev *sdev)
1030{
1031 static int dev;
1032 struct linux_prom_registers reg_prop;
1033 struct linux_prom_irqs irq_prop;
1034 struct resource res, *rp;
1035 snd_card_t *card;
1036 amd7930_t *amd;
1037 int err;
1038
1039 if (dev >= SNDRV_CARDS)
1040 return -ENODEV;
1041 if (!enable[dev]) {
1042 dev++;
1043 return -ENOENT;
1044 }
1045
1046 err = prom_getproperty(prom_node, "intr",
1047 (char *) &irq_prop, sizeof(irq_prop));
1048 if (err < 0) {
1049 snd_printk("amd7930-%d: Firmware node lacks IRQ property.\n", dev);
1050 return -ENODEV;
1051 }
1052
1053 err = prom_getproperty(prom_node, "reg",
1054 (char *) &reg_prop, sizeof(reg_prop));
1055 if (err < 0) {
1056 snd_printk("amd7930-%d: Firmware node lacks register property.\n", dev);
1057 return -ENODEV;
1058 }
1059
1060 if (sdev) {
1061 rp = &sdev->resource[0];
1062 } else {
1063 rp = &res;
1064 rp->start = reg_prop.phys_addr;
1065 rp->end = rp->start + reg_prop.reg_size - 1;
1066 rp->flags = IORESOURCE_IO | (reg_prop.which_io & 0xff);
1067 }
1068
1069 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1070 if (card == NULL)
1071 return -ENOMEM;
1072
1073 strcpy(card->driver, "AMD7930");
1074 strcpy(card->shortname, "Sun AMD7930");
1075 sprintf(card->longname, "%s at 0x%02lx:0x%08lx, irq %s",
1076 card->shortname,
1077 rp->flags & 0xffL,
1078 rp->start,
1079 __irq_itoa(irq_prop.pri));
1080
1081 if ((err = snd_amd7930_create(card, sdev, rp, reg_prop.reg_size,
1082 &irq_prop, dev, &amd)) < 0)
1083 goto out_err;
1084
1085 if ((err = snd_amd7930_pcm(amd)) < 0)
1086 goto out_err;
1087
1088 if ((err = snd_amd7930_mixer(amd)) < 0)
1089 goto out_err;
1090
16dab54b
TI		 1091 if ((err = snd_card_set_generic_dev(card)) < 0)
1092 goto out_err;
1093
1da177e4
LT		 1094 if ((err = snd_card_register(card)) < 0)
1095 goto out_err;
1096
1097 amd->next = amd7930_list;
1098 amd7930_list = amd;
1099
1100 dev++;
1101 return 0;
1102
1103out_err:
1104 snd_card_free(card);
1105 return err;
1106}
1107
1108static int __init amd7930_init(void)
1109{
1110 struct sbus_bus *sbus;
1111 struct sbus_dev *sdev;
1112 int node, found;
1113
1114 found = 0;
1115
1116 /* Try to find the sun4c "audio" node first. */
1117 node = prom_getchild(prom_root_node);
1118 node = prom_searchsiblings(node, "audio");
1119 if (node && amd7930_attach(node, NULL) == 0)
1120 found++;
1121
1122 /* Probe each SBUS for amd7930 chips. */
1123 for_all_sbusdev(sdev, sbus) {
1124 if (!strcmp(sdev->prom_name, "audio")) {
1125 if (amd7930_attach(sdev->prom_node, sdev) == 0)
1126 found++;
1127 }
1128 }
1129
1130 return (found > 0) ? 0 : -EIO;
1131}
1132
1133static void __exit amd7930_exit(void)
1134{
1135 amd7930_t *p = amd7930_list;
1136
1137 while (p != NULL) {
1138 amd7930_t *next = p->next;
1139
1140 snd_card_free(p->card);
1141
1142 p = next;
1143 }
1144
1145 amd7930_list = NULL;
1146}
1147
1148module_init(amd7930_init);
1149module_exit(amd7930_exit);
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