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[ALSA] virtuoso: restrict period time to less than 10 s
[zen-stable.git] / sound / sparc / amd7930.c
blob0c63e0585b15eed7d819dc55531db1d321865830
1 /*
2 * Driver for AMD7930 sound chips found on Sparcs.
3 * Copyright (C) 2002 David S. Miller <davem@redhat.com>
4 *
5 * Based entirely upon drivers/sbus/audio/amd7930.c which is:
6 * Copyright (C) 1996,1997 Thomas K. Dyas (tdyas@eden.rutgers.edu)
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/core.h>
40 #include <sound/pcm.h>
41 #include <sound/info.h>
42 #include <sound/control.h>
43 #include <sound/initval.h>
44
45 #include <asm/io.h>
46 #include <asm/irq.h>
47 #include <asm/sbus.h>
48 #include <asm/prom.h>
49
50 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
51 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
52 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
53
54 module_param_array(index, int, NULL, 0444);
55 MODULE_PARM_DESC(index, "Index value for Sun AMD7930 soundcard.");
56 module_param_array(id, charp, NULL, 0444);
57 MODULE_PARM_DESC(id, "ID string for Sun AMD7930 soundcard.");
58 module_param_array(enable, bool, NULL, 0444);
59 MODULE_PARM_DESC(enable, "Enable Sun AMD7930 soundcard.");
60 MODULE_AUTHOR("Thomas K. Dyas and David S. Miller");
61 MODULE_DESCRIPTION("Sun AMD7930");
62 MODULE_LICENSE("GPL");
63 MODULE_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. */
82 struct 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
314 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 struct snd_card *card;
324 struct snd_pcm *pcm;
325 struct snd_pcm_substream *playback_substream;
326 struct snd_pcm_substream *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 unsigned int irq;
339 unsigned int regs_size;
340 struct snd_amd7930 *next;
341 };
342
343 static struct snd_amd7930 *amd7930_list;
344
345 /* Idle the AMD7930 chip. The amd->lock is not held. */
346 static __inline__ void amd7930_idle(struct snd_amd7930 *amd)
347 {
348 unsigned long flags;
349
350 spin_lock_irqsave(&amd->lock, flags);
351 sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
352 sbus_writeb(0, amd->regs + AMD7930_DR);
353 spin_unlock_irqrestore(&amd->lock, flags);
354 }
355
356 /* Enable chip interrupts. The amd->lock is not held. */
357 static __inline__ void amd7930_enable_ints(struct snd_amd7930 *amd)
358 {
359 unsigned long flags;
360
361 spin_lock_irqsave(&amd->lock, flags);
362 sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
363 sbus_writeb(AM_INIT_ACTIVE, amd->regs + AMD7930_DR);
364 spin_unlock_irqrestore(&amd->lock, flags);
365 }
366
367 /* Disable chip interrupts. The amd->lock is not held. */
368 static __inline__ void amd7930_disable_ints(struct snd_amd7930 *amd)
369 {
370 unsigned long flags;
371
372 spin_lock_irqsave(&amd->lock, flags);
373 sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
374 sbus_writeb(AM_INIT_ACTIVE | AM_INIT_DISABLE_INTS, amd->regs + AMD7930_DR);
375 spin_unlock_irqrestore(&amd->lock, flags);
376 }
377
378 /* Commit amd7930_map settings to the hardware.
379 * The amd->lock is held and local interrupts are disabled.
380 */
381 static void __amd7930_write_map(struct snd_amd7930 *amd)
382 {
383 struct amd7930_map *map = &amd->map;
384
385 sbus_writeb(AMR_MAP_GX, amd->regs + AMD7930_CR);
386 sbus_writeb(((map->gx >> 0) & 0xff), amd->regs + AMD7930_DR);
387 sbus_writeb(((map->gx >> 8) & 0xff), amd->regs + AMD7930_DR);
388
389 sbus_writeb(AMR_MAP_GR, amd->regs + AMD7930_CR);
390 sbus_writeb(((map->gr >> 0) & 0xff), amd->regs + AMD7930_DR);
391 sbus_writeb(((map->gr >> 8) & 0xff), amd->regs + AMD7930_DR);
392
393 sbus_writeb(AMR_MAP_STGR, amd->regs + AMD7930_CR);
394 sbus_writeb(((map->stgr >> 0) & 0xff), amd->regs + AMD7930_DR);
395 sbus_writeb(((map->stgr >> 8) & 0xff), amd->regs + AMD7930_DR);
396
397 sbus_writeb(AMR_MAP_GER, amd->regs + AMD7930_CR);
398 sbus_writeb(((map->ger >> 0) & 0xff), amd->regs + AMD7930_DR);
399 sbus_writeb(((map->ger >> 8) & 0xff), amd->regs + AMD7930_DR);
400
401 sbus_writeb(AMR_MAP_MMR1, amd->regs + AMD7930_CR);
402 sbus_writeb(map->mmr1, amd->regs + AMD7930_DR);
403
404 sbus_writeb(AMR_MAP_MMR2, amd->regs + AMD7930_CR);
405 sbus_writeb(map->mmr2, amd->regs + AMD7930_DR);
406 }
407
408 /* gx, gr & stg gains. this table must contain 256 elements with
409 * the 0th being "infinity" (the magic value 9008). The remaining
410 * elements match sun's gain curve (but with higher resolution):
411 * -18 to 0dB in .16dB steps then 0 to 12dB in .08dB steps.
412 */
413 static __const__ __u16 gx_coeff[256] = {
414 0x9008, 0x8b7c, 0x8b51, 0x8b45, 0x8b42, 0x8b3b, 0x8b36, 0x8b33,
415 0x8b32, 0x8b2a, 0x8b2b, 0x8b2c, 0x8b25, 0x8b23, 0x8b22, 0x8b22,
416 0x9122, 0x8b1a, 0x8aa3, 0x8aa3, 0x8b1c, 0x8aa6, 0x912d, 0x912b,
417 0x8aab, 0x8b12, 0x8aaa, 0x8ab2, 0x9132, 0x8ab4, 0x913c, 0x8abb,
418 0x9142, 0x9144, 0x9151, 0x8ad5, 0x8aeb, 0x8a79, 0x8a5a, 0x8a4a,
419 0x8b03, 0x91c2, 0x91bb, 0x8a3f, 0x8a33, 0x91b2, 0x9212, 0x9213,
420 0x8a2c, 0x921d, 0x8a23, 0x921a, 0x9222, 0x9223, 0x922d, 0x9231,
421 0x9234, 0x9242, 0x925b, 0x92dd, 0x92c1, 0x92b3, 0x92ab, 0x92a4,
422 0x92a2, 0x932b, 0x9341, 0x93d3, 0x93b2, 0x93a2, 0x943c, 0x94b2,
423 0x953a, 0x9653, 0x9782, 0x9e21, 0x9d23, 0x9cd2, 0x9c23, 0x9baa,
424 0x9bde, 0x9b33, 0x9b22, 0x9b1d, 0x9ab2, 0xa142, 0xa1e5, 0x9a3b,
425 0xa213, 0xa1a2, 0xa231, 0xa2eb, 0xa313, 0xa334, 0xa421, 0xa54b,
426 0xada4, 0xac23, 0xab3b, 0xaaab, 0xaa5c, 0xb1a3, 0xb2ca, 0xb3bd,
427 0xbe24, 0xbb2b, 0xba33, 0xc32b, 0xcb5a, 0xd2a2, 0xe31d, 0x0808,
428 0x72ba, 0x62c2, 0x5c32, 0x52db, 0x513e, 0x4cce, 0x43b2, 0x4243,
429 0x41b4, 0x3b12, 0x3bc3, 0x3df2, 0x34bd, 0x3334, 0x32c2, 0x3224,
430 0x31aa, 0x2a7b, 0x2aaa, 0x2b23, 0x2bba, 0x2c42, 0x2e23, 0x25bb,
431 0x242b, 0x240f, 0x231a, 0x22bb, 0x2241, 0x2223, 0x221f, 0x1a33,
432 0x1a4a, 0x1acd, 0x2132, 0x1b1b, 0x1b2c, 0x1b62, 0x1c12, 0x1c32,
433 0x1d1b, 0x1e71, 0x16b1, 0x1522, 0x1434, 0x1412, 0x1352, 0x1323,
434 0x1315, 0x12bc, 0x127a, 0x1235, 0x1226, 0x11a2, 0x1216, 0x0a2a,
435 0x11bc, 0x11d1, 0x1163, 0x0ac2, 0x0ab2, 0x0aab, 0x0b1b, 0x0b23,
436 0x0b33, 0x0c0f, 0x0bb3, 0x0c1b, 0x0c3e, 0x0cb1, 0x0d4c, 0x0ec1,
437 0x079a, 0x0614, 0x0521, 0x047c, 0x0422, 0x03b1, 0x03e3, 0x0333,
438 0x0322, 0x031c, 0x02aa, 0x02ba, 0x02f2, 0x0242, 0x0232, 0x0227,
439 0x0222, 0x021b, 0x01ad, 0x0212, 0x01b2, 0x01bb, 0x01cb, 0x01f6,
440 0x0152, 0x013a, 0x0133, 0x0131, 0x012c, 0x0123, 0x0122, 0x00a2,
441 0x011b, 0x011e, 0x0114, 0x00b1, 0x00aa, 0x00b3, 0x00bd, 0x00ba,
442 0x00c5, 0x00d3, 0x00f3, 0x0062, 0x0051, 0x0042, 0x003b, 0x0033,
443 0x0032, 0x002a, 0x002c, 0x0025, 0x0023, 0x0022, 0x001a, 0x0021,
444 0x001b, 0x001b, 0x001d, 0x0015, 0x0013, 0x0013, 0x0012, 0x0012,
445 0x000a, 0x000a, 0x0011, 0x0011, 0x000b, 0x000b, 0x000c, 0x000e,
446 };
447
448 static __const__ __u16 ger_coeff[] = {
449 0x431f, /* 5. dB */
450 0x331f, /* 5.5 dB */
451 0x40dd, /* 6. dB */
452 0x11dd, /* 6.5 dB */
453 0x440f, /* 7. dB */
454 0x411f, /* 7.5 dB */
455 0x311f, /* 8. dB */
456 0x5520, /* 8.5 dB */
457 0x10dd, /* 9. dB */
458 0x4211, /* 9.5 dB */
459 0x410f, /* 10. dB */
460 0x111f, /* 10.5 dB */
461 0x600b, /* 11. dB */
462 0x00dd, /* 11.5 dB */
463 0x4210, /* 12. dB */
464 0x110f, /* 13. dB */
465 0x7200, /* 14. dB */
466 0x2110, /* 15. dB */
467 0x2200, /* 15.9 dB */
468 0x000b, /* 16.9 dB */
469 0x000f /* 18. dB */
470 };
471
472 /* Update amd7930_map settings and program them into the hardware.
473 * The amd->lock is held and local interrupts are disabled.
474 */
475 static void __amd7930_update_map(struct snd_amd7930 *amd)
476 {
477 struct amd7930_map *map = &amd->map;
478 int level;
479
480 map->gx = gx_coeff[amd->rgain];
481 map->stgr = gx_coeff[amd->mgain];
482 level = (amd->pgain * (256 + ARRAY_SIZE(ger_coeff))) >> 8;
483 if (level >= 256) {
484 map->ger = ger_coeff[level - 256];
485 map->gr = gx_coeff[255];
486 } else {
487 map->ger = ger_coeff[0];
488 map->gr = gx_coeff[level];
489 }
490 __amd7930_write_map(amd);
491 }
492
493 static irqreturn_t snd_amd7930_interrupt(int irq, void *dev_id)
494 {
495 struct snd_amd7930 *amd = dev_id;
496 unsigned int elapsed;
497 u8 ir;
498
499 spin_lock(&amd->lock);
500
501 elapsed = 0;
502
503 ir = sbus_readb(amd->regs + AMD7930_IR);
504 if (ir & AMR_IR_BBUF) {
505 u8 byte;
506
507 if (amd->flags & AMD7930_FLAG_PLAYBACK) {
508 if (amd->p_left > 0) {
509 byte = *(amd->p_cur++);
510 amd->p_left--;
511 sbus_writeb(byte, amd->regs + AMD7930_BBTB);
512 if (amd->p_left == 0)
513 elapsed |= AMD7930_FLAG_PLAYBACK;
514 } else
515 sbus_writeb(0, amd->regs + AMD7930_BBTB);
516 } else if (amd->flags & AMD7930_FLAG_CAPTURE) {
517 byte = sbus_readb(amd->regs + AMD7930_BBRB);
518 if (amd->c_left > 0) {
519 *(amd->c_cur++) = byte;
520 amd->c_left--;
521 if (amd->c_left == 0)
522 elapsed |= AMD7930_FLAG_CAPTURE;
523 }
524 }
525 }
526 spin_unlock(&amd->lock);
527
528 if (elapsed & AMD7930_FLAG_PLAYBACK)
529 snd_pcm_period_elapsed(amd->playback_substream);
530 else
531 snd_pcm_period_elapsed(amd->capture_substream);
532
533 return IRQ_HANDLED;
534 }
535
536 static int snd_amd7930_trigger(struct snd_amd7930 *amd, unsigned int flag, int cmd)
537 {
538 unsigned long flags;
539 int result = 0;
540
541 spin_lock_irqsave(&amd->lock, flags);
542 if (cmd == SNDRV_PCM_TRIGGER_START) {
543 if (!(amd->flags & flag)) {
544 amd->flags |= flag;
545
546 /* Enable B channel interrupts. */
547 sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
548 sbus_writeb(AM_MUX_MCR4_ENABLE_INTS, amd->regs + AMD7930_DR);
549 }
550 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
551 if (amd->flags & flag) {
552 amd->flags &= ~flag;
553
554 /* Disable B channel interrupts. */
555 sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
556 sbus_writeb(0, amd->regs + AMD7930_DR);
557 }
558 } else {
559 result = -EINVAL;
560 }
561 spin_unlock_irqrestore(&amd->lock, flags);
562
563 return result;
564 }
565
566 static int snd_amd7930_playback_trigger(struct snd_pcm_substream *substream,
567 int cmd)
568 {
569 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
570 return snd_amd7930_trigger(amd, AMD7930_FLAG_PLAYBACK, cmd);
571 }
572
573 static int snd_amd7930_capture_trigger(struct snd_pcm_substream *substream,
574 int cmd)
575 {
576 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
577 return snd_amd7930_trigger(amd, AMD7930_FLAG_CAPTURE, cmd);
578 }
579
580 static int snd_amd7930_playback_prepare(struct snd_pcm_substream *substream)
581 {
582 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
583 struct snd_pcm_runtime *runtime = substream->runtime;
584 unsigned int size = snd_pcm_lib_buffer_bytes(substream);
585 unsigned long flags;
586 u8 new_mmr1;
587
588 spin_lock_irqsave(&amd->lock, flags);
589
590 amd->flags |= AMD7930_FLAG_PLAYBACK;
591
592 /* Setup the pseudo-dma transfer pointers. */
593 amd->p_orig = amd->p_cur = runtime->dma_area;
594 amd->p_left = size;
595
596 /* Put the chip into the correct encoding format. */
597 new_mmr1 = amd->map.mmr1;
598 if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
599 new_mmr1 |= AM_MAP_MMR1_ALAW;
600 else
601 new_mmr1 &= ~AM_MAP_MMR1_ALAW;
602 if (new_mmr1 != amd->map.mmr1) {
603 amd->map.mmr1 = new_mmr1;
604 __amd7930_update_map(amd);
605 }
606
607 spin_unlock_irqrestore(&amd->lock, flags);
608
609 return 0;
610 }
611
612 static int snd_amd7930_capture_prepare(struct snd_pcm_substream *substream)
613 {
614 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
615 struct snd_pcm_runtime *runtime = substream->runtime;
616 unsigned int size = snd_pcm_lib_buffer_bytes(substream);
617 unsigned long flags;
618 u8 new_mmr1;
619
620 spin_lock_irqsave(&amd->lock, flags);
621
622 amd->flags |= AMD7930_FLAG_CAPTURE;
623
624 /* Setup the pseudo-dma transfer pointers. */
625 amd->c_orig = amd->c_cur = runtime->dma_area;
626 amd->c_left = size;
627
628 /* Put the chip into the correct encoding format. */
629 new_mmr1 = amd->map.mmr1;
630 if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
631 new_mmr1 |= AM_MAP_MMR1_ALAW;
632 else
633 new_mmr1 &= ~AM_MAP_MMR1_ALAW;
634 if (new_mmr1 != amd->map.mmr1) {
635 amd->map.mmr1 = new_mmr1;
636 __amd7930_update_map(amd);
637 }
638
639 spin_unlock_irqrestore(&amd->lock, flags);
640
641 return 0;
642 }
643
644 static snd_pcm_uframes_t snd_amd7930_playback_pointer(struct snd_pcm_substream *substream)
645 {
646 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
647 size_t ptr;
648
649 if (!(amd->flags & AMD7930_FLAG_PLAYBACK))
650 return 0;
651 ptr = amd->p_cur - amd->p_orig;
652 return bytes_to_frames(substream->runtime, ptr);
653 }
654
655 static snd_pcm_uframes_t snd_amd7930_capture_pointer(struct snd_pcm_substream *substream)
656 {
657 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
658 size_t ptr;
659
660 if (!(amd->flags & AMD7930_FLAG_CAPTURE))
661 return 0;
662
663 ptr = amd->c_cur - amd->c_orig;
664 return bytes_to_frames(substream->runtime, ptr);
665 }
666
667 /* Playback and capture have identical properties. */
668 static struct snd_pcm_hardware snd_amd7930_pcm_hw =
669 {
670 .info = (SNDRV_PCM_INFO_MMAP |
671 SNDRV_PCM_INFO_MMAP_VALID |
672 SNDRV_PCM_INFO_INTERLEAVED |
673 SNDRV_PCM_INFO_BLOCK_TRANSFER |
674 SNDRV_PCM_INFO_HALF_DUPLEX),
675 .formats = SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
676 .rates = SNDRV_PCM_RATE_8000,
677 .rate_min = 8000,
678 .rate_max = 8000,
679 .channels_min = 1,
680 .channels_max = 1,
681 .buffer_bytes_max = (64*1024),
682 .period_bytes_min = 1,
683 .period_bytes_max = (64*1024),
684 .periods_min = 1,
685 .periods_max = 1024,
686 };
687
688 static int snd_amd7930_playback_open(struct snd_pcm_substream *substream)
689 {
690 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
691 struct snd_pcm_runtime *runtime = substream->runtime;
692
693 amd->playback_substream = substream;
694 runtime->hw = snd_amd7930_pcm_hw;
695 return 0;
696 }
697
698 static int snd_amd7930_capture_open(struct snd_pcm_substream *substream)
699 {
700 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
701 struct snd_pcm_runtime *runtime = substream->runtime;
702
703 amd->capture_substream = substream;
704 runtime->hw = snd_amd7930_pcm_hw;
705 return 0;
706 }
707
708 static int snd_amd7930_playback_close(struct snd_pcm_substream *substream)
709 {
710 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
711
712 amd->playback_substream = NULL;
713 return 0;
714 }
715
716 static int snd_amd7930_capture_close(struct snd_pcm_substream *substream)
717 {
718 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
719
720 amd->capture_substream = NULL;
721 return 0;
722 }
723
724 static int snd_amd7930_hw_params(struct snd_pcm_substream *substream,
725 struct snd_pcm_hw_params *hw_params)
726 {
727 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
728 }
729
730 static int snd_amd7930_hw_free(struct snd_pcm_substream *substream)
731 {
732 return snd_pcm_lib_free_pages(substream);
733 }
734
735 static struct snd_pcm_ops snd_amd7930_playback_ops = {
736 .open = snd_amd7930_playback_open,
737 .close = snd_amd7930_playback_close,
738 .ioctl = snd_pcm_lib_ioctl,
739 .hw_params = snd_amd7930_hw_params,
740 .hw_free = snd_amd7930_hw_free,
741 .prepare = snd_amd7930_playback_prepare,
742 .trigger = snd_amd7930_playback_trigger,
743 .pointer = snd_amd7930_playback_pointer,
744 };
745
746 static struct snd_pcm_ops snd_amd7930_capture_ops = {
747 .open = snd_amd7930_capture_open,
748 .close = snd_amd7930_capture_close,
749 .ioctl = snd_pcm_lib_ioctl,
750 .hw_params = snd_amd7930_hw_params,
751 .hw_free = snd_amd7930_hw_free,
752 .prepare = snd_amd7930_capture_prepare,
753 .trigger = snd_amd7930_capture_trigger,
754 .pointer = snd_amd7930_capture_pointer,
755 };
756
757 static int __devinit snd_amd7930_pcm(struct snd_amd7930 *amd)
758 {
759 struct snd_pcm *pcm;
760 int err;
761
762 if ((err = snd_pcm_new(amd->card,
763 /* ID */ "sun_amd7930",
764 /* device */ 0,
765 /* playback count */ 1,
766 /* capture count */ 1, &pcm)) < 0)
767 return err;
768 snd_assert(pcm != NULL, return -EINVAL);
769
770 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_amd7930_playback_ops);
771 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_amd7930_capture_ops);
772
773 pcm->private_data = amd;
774 pcm->info_flags = 0;
775 strcpy(pcm->name, amd->card->shortname);
776 amd->pcm = pcm;
777
778 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
779 snd_dma_continuous_data(GFP_KERNEL),
780 64*1024, 64*1024);
781
782 return 0;
783 }
784
785 #define VOLUME_MONITOR 0
786 #define VOLUME_CAPTURE 1
787 #define VOLUME_PLAYBACK 2
788
789 static int snd_amd7930_info_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo)
790 {
791 int type = kctl->private_value;
792
793 snd_assert(type == VOLUME_MONITOR ||
794 type == VOLUME_CAPTURE ||
795 type == VOLUME_PLAYBACK, return -EINVAL);
796 (void) type;
797
798 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
799 uinfo->count = 1;
800 uinfo->value.integer.min = 0;
801 uinfo->value.integer.max = 255;
802
803 return 0;
804 }
805
806 static int snd_amd7930_get_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
807 {
808 struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
809 int type = kctl->private_value;
810 int *swval;
811
812 snd_assert(type == VOLUME_MONITOR ||
813 type == VOLUME_CAPTURE ||
814 type == VOLUME_PLAYBACK, return -EINVAL);
815
816 switch (type) {
817 case VOLUME_MONITOR:
818 swval = &amd->mgain;
819 break;
820 case VOLUME_CAPTURE:
821 swval = &amd->rgain;
822 break;
823 case VOLUME_PLAYBACK:
824 default:
825 swval = &amd->pgain;
826 break;
827 };
828
829 ucontrol->value.integer.value[0] = *swval;
830
831 return 0;
832 }
833
834 static int snd_amd7930_put_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
835 {
836 struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
837 unsigned long flags;
838 int type = kctl->private_value;
839 int *swval, change;
840
841 snd_assert(type == VOLUME_MONITOR ||
842 type == VOLUME_CAPTURE ||
843 type == VOLUME_PLAYBACK, return -EINVAL);
844
845 switch (type) {
846 case VOLUME_MONITOR:
847 swval = &amd->mgain;
848 break;
849 case VOLUME_CAPTURE:
850 swval = &amd->rgain;
851 break;
852 case VOLUME_PLAYBACK:
853 default:
854 swval = &amd->pgain;
855 break;
856 };
857
858 spin_lock_irqsave(&amd->lock, flags);
859
860 if (*swval != ucontrol->value.integer.value[0]) {
861 *swval = ucontrol->value.integer.value[0] & 0xff;
862 __amd7930_update_map(amd);
863 change = 1;
864 } else
865 change = 0;
866
867 spin_unlock_irqrestore(&amd->lock, flags);
868
869 return change;
870 }
871
872 static struct snd_kcontrol_new amd7930_controls[] __devinitdata = {
873 {
874 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
875 .name = "Monitor Volume",
876 .index = 0,
877 .info = snd_amd7930_info_volume,
878 .get = snd_amd7930_get_volume,
879 .put = snd_amd7930_put_volume,
880 .private_value = VOLUME_MONITOR,
881 },
882 {
883 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
884 .name = "Capture Volume",
885 .index = 0,
886 .info = snd_amd7930_info_volume,
887 .get = snd_amd7930_get_volume,
888 .put = snd_amd7930_put_volume,
889 .private_value = VOLUME_CAPTURE,
890 },
891 {
892 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
893 .name = "Playback Volume",
894 .index = 0,
895 .info = snd_amd7930_info_volume,
896 .get = snd_amd7930_get_volume,
897 .put = snd_amd7930_put_volume,
898 .private_value = VOLUME_PLAYBACK,
899 },
900 };
901
902 static int __devinit snd_amd7930_mixer(struct snd_amd7930 *amd)
903 {
904 struct snd_card *card;
905 int idx, err;
906
907 snd_assert(amd != NULL && amd->card != NULL, return -EINVAL);
908
909 card = amd->card;
910 strcpy(card->mixername, card->shortname);
911
912 for (idx = 0; idx < ARRAY_SIZE(amd7930_controls); idx++) {
913 if ((err = snd_ctl_add(card,
914 snd_ctl_new1(&amd7930_controls[idx], amd))) < 0)
915 return err;
916 }
917
918 return 0;
919 }
920
921 static int snd_amd7930_free(struct snd_amd7930 *amd)
922 {
923 amd7930_idle(amd);
924
925 if (amd->irq)
926 free_irq(amd->irq, amd);
927
928 if (amd->regs)
929 sbus_iounmap(amd->regs, amd->regs_size);
930
931 kfree(amd);
932
933 return 0;
934 }
935
936 static int snd_amd7930_dev_free(struct snd_device *device)
937 {
938 struct snd_amd7930 *amd = device->device_data;
939
940 return snd_amd7930_free(amd);
941 }
942
943 static struct snd_device_ops snd_amd7930_dev_ops = {
944 .dev_free = snd_amd7930_dev_free,
945 };
946
947 static int __devinit snd_amd7930_create(struct snd_card *card,
948 struct resource *rp,
949 unsigned int reg_size,
950 int irq, int dev,
951 struct snd_amd7930 **ramd)
952 {
953 unsigned long flags;
954 struct snd_amd7930 *amd;
955 int err;
956
957 *ramd = NULL;
958 amd = kzalloc(sizeof(*amd), GFP_KERNEL);
959 if (amd == NULL)
960 return -ENOMEM;
961
962 spin_lock_init(&amd->lock);
963 amd->card = card;
964 amd->regs_size = reg_size;
965
966 amd->regs = sbus_ioremap(rp, 0, amd->regs_size, "amd7930");
967 if (!amd->regs) {
968 snd_printk("amd7930-%d: Unable to map chip registers.\n", dev);
969 return -EIO;
970 }
971
972 amd7930_idle(amd);
973
974 if (request_irq(irq, snd_amd7930_interrupt,
975 IRQF_DISABLED | IRQF_SHARED, "amd7930", amd)) {
976 snd_printk("amd7930-%d: Unable to grab IRQ %d\n",
977 dev, irq);
978 snd_amd7930_free(amd);
979 return -EBUSY;
980 }
981 amd->irq = irq;
982
983 amd7930_enable_ints(amd);
984
985 spin_lock_irqsave(&amd->lock, flags);
986
987 amd->rgain = 128;
988 amd->pgain = 200;
989 amd->mgain = 0;
990
991 memset(&amd->map, 0, sizeof(amd->map));
992 amd->map.mmr1 = (AM_MAP_MMR1_GX | AM_MAP_MMR1_GER |
993 AM_MAP_MMR1_GR | AM_MAP_MMR1_STG);
994 amd->map.mmr2 = (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB);
995
996 __amd7930_update_map(amd);
997
998 /* Always MUX audio (Ba) to channel Bb. */
999 sbus_writeb(AMR_MUX_MCR1, amd->regs + AMD7930_CR);
1000 sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4),
1001 amd->regs + AMD7930_DR);
1002
1003 spin_unlock_irqrestore(&amd->lock, flags);
1004
1005 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
1006 amd, &snd_amd7930_dev_ops)) < 0) {
1007 snd_amd7930_free(amd);
1008 return err;
1009 }
1010
1011 *ramd = amd;
1012 return 0;
1013 }
1014
1015 static int __devinit amd7930_attach_common(struct resource *rp, int irq)
1016 {
1017 static int dev_num;
1018 struct snd_card *card;
1019 struct snd_amd7930 *amd;
1020 int err;
1021
1022 if (dev_num >= SNDRV_CARDS)
1023 return -ENODEV;
1024 if (!enable[dev_num]) {
1025 dev_num++;
1026 return -ENOENT;
1027 }
1028
1029 card = snd_card_new(index[dev_num], id[dev_num], THIS_MODULE, 0);
1030 if (card == NULL)
1031 return -ENOMEM;
1032
1033 strcpy(card->driver, "AMD7930");
1034 strcpy(card->shortname, "Sun AMD7930");
1035 sprintf(card->longname, "%s at 0x%02lx:0x%08Lx, irq %d",
1036 card->shortname,
1037 rp->flags & 0xffL,
1038 (unsigned long long)rp->start,
1039 irq);
1040
1041 if ((err = snd_amd7930_create(card, rp,
1042 (rp->end - rp->start) + 1,
1043 irq, dev_num, &amd)) < 0)
1044 goto out_err;
1045
1046 if ((err = snd_amd7930_pcm(amd)) < 0)
1047 goto out_err;
1048
1049 if ((err = snd_amd7930_mixer(amd)) < 0)
1050 goto out_err;
1051
1052 if ((err = snd_card_register(card)) < 0)
1053 goto out_err;
1054
1055 amd->next = amd7930_list;
1056 amd7930_list = amd;
1057
1058 dev_num++;
1059
1060 return 0;
1061
1062 out_err:
1063 snd_card_free(card);
1064 return err;
1065 }
1066
1067 static int __devinit amd7930_obio_attach(struct device_node *dp)
1068 {
1069 const struct linux_prom_registers *regs;
1070 const struct linux_prom_irqs *irqp;
1071 struct resource res, *rp;
1072 int len;
1073
1074 irqp = of_get_property(dp, "intr", &len);
1075 if (!irqp) {
1076 snd_printk("%s: Firmware node lacks IRQ property.\n",
1077 dp->full_name);
1078 return -ENODEV;
1079 }
1080
1081 regs = of_get_property(dp, "reg", &len);
1082 if (!regs) {
1083 snd_printk("%s: Firmware node lacks register property.\n",
1084 dp->full_name);
1085 return -ENODEV;
1086 }
1087
1088 rp = &res;
1089 rp->start = regs->phys_addr;
1090 rp->end = rp->start + regs->reg_size - 1;
1091 rp->flags = IORESOURCE_IO | (regs->which_io & 0xff);
1092
1093 return amd7930_attach_common(rp, irqp->pri);
1094 }
1095
1096 static int __devinit amd7930_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1097 {
1098 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1099
1100 return amd7930_attach_common(&sdev->resource[0], sdev->irqs[0]);
1101 }
1102
1103 static struct of_device_id amd7930_match[] = {
1104 {
1105 .name = "audio",
1106 },
1107 {},
1108 };
1109
1110 static struct of_platform_driver amd7930_sbus_driver = {
1111 .name = "audio",
1112 .match_table = amd7930_match,
1113 .probe = amd7930_sbus_probe,
1114 };
1115
1116 static int __init amd7930_init(void)
1117 {
1118 struct device_node *dp;
1119
1120 /* Try to find the sun4c "audio" node first. */
1121 dp = of_find_node_by_path("/");
1122 dp = dp->child;
1123 while (dp) {
1124 if (!strcmp(dp->name, "audio"))
1125 amd7930_obio_attach(dp);
1126
1127 dp = dp->sibling;
1128 }
1129
1130 /* Probe each SBUS for amd7930 chips. */
1131 return of_register_driver(&amd7930_sbus_driver, &sbus_bus_type);
1132 }
1133
1134 static void __exit amd7930_exit(void)
1135 {
1136 struct snd_amd7930 *p = amd7930_list;
1137
1138 while (p != NULL) {
1139 struct snd_amd7930 *next = p->next;
1140
1141 snd_card_free(p->card);
1142
1143 p = next;
1144 }
1145
1146 amd7930_list = NULL;
1147
1148 of_unregister_driver(&amd7930_sbus_driver);
1149 }
1150
1151 module_init(amd7930_init);
1152 module_exit(amd7930_exit);