1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for AMD7930 sound chips found on Sparcs.
4 * Copyright (C) 2002, 2008 David S. Miller <davem@davemloft.net>
5 *
6 * Based entirely upon drivers/sbus/audio/amd7930.c which is:
7 * Copyright (C) 1996,1997 Thomas K. Dyas (tdyas@eden.rutgers.edu)
8 *
9 * --- Notes from Thomas's original driver ---
10 * This is the lowlevel driver for the AMD7930 audio chip found on all
11 * sun4c machines and some sun4m machines.
12 *
13 * The amd7930 is actually an ISDN chip which has a very simple
14 * integrated audio encoder/decoder. When Sun decided on what chip to
15 * use for audio, they had the brilliant idea of using the amd7930 and
16 * only connecting the audio encoder/decoder pins.
17 *
18 * Thanks to the AMD engineer who was able to get us the AMD79C30
19 * databook which has all the programming information and gain tables.
20 *
21 * Advanced Micro Devices' Am79C30A is an ISDN/audio chip used in the
22 * SparcStation 1+. The chip provides microphone and speaker interfaces
23 * which provide mono-channel audio at 8K samples per second via either
24 * 8-bit A-law or 8-bit mu-law encoding. Also, the chip features an
25 * ISDN BRI Line Interface Unit (LIU), I.430 S/T physical interface,
26 * which performs basic D channel LAPD processing and provides raw
27 * B channel data. The digital audio channel, the two ISDN B channels,
28 * and two 64 Kbps channels to the microprocessor are all interconnected
29 * via a multiplexer.
30 * --- End of notes from Thoamas's original driver ---
31 */
32
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/slab.h>
36 #include <linux/init.h>
37 #include <linux/interrupt.h>
38 #include <linux/moduleparam.h>
39 #include <linux/of.h>
40 #include <linux/of_device.h>
41 #include <linux/io.h>
42
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/info.h>
46 #include <sound/control.h>
47 #include <sound/initval.h>
48
49 #include <asm/irq.h>
50 #include <asm/prom.h>
51
52 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
53 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
54 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
55
56 module_param_array(index, int, NULL, 0444);
57 MODULE_PARM_DESC(index, "Index value for Sun AMD7930 soundcard.");
58 module_param_array(id, charp, NULL, 0444);
59 MODULE_PARM_DESC(id, "ID string for Sun AMD7930 soundcard.");
60 module_param_array(enable, bool, NULL, 0444);
61 MODULE_PARM_DESC(enable, "Enable Sun AMD7930 soundcard.");
62 MODULE_AUTHOR("Thomas K. Dyas and David S. Miller");
63 MODULE_DESCRIPTION("Sun AMD7930");
64 MODULE_LICENSE("GPL");
65
66 /* Device register layout. */
67
68 /* Register interface presented to the CPU by the amd7930. */
69 #define AMD7930_CR 0x00UL /* Command Register (W) */
70 #define AMD7930_IR AMD7930_CR /* Interrupt Register (R) */
71 #define AMD7930_DR 0x01UL /* Data Register (R/W) */
72 #define AMD7930_DSR1 0x02UL /* D-channel Status Register 1 (R) */
73 #define AMD7930_DER 0x03UL /* D-channel Error Register (R) */
74 #define AMD7930_DCTB 0x04UL /* D-channel Transmit Buffer (W) */
75 #define AMD7930_DCRB AMD7930_DCTB /* D-channel Receive Buffer (R) */
76 #define AMD7930_BBTB 0x05UL /* Bb-channel Transmit Buffer (W) */
77 #define AMD7930_BBRB AMD7930_BBTB /* Bb-channel Receive Buffer (R) */
78 #define AMD7930_BCTB 0x06UL /* Bc-channel Transmit Buffer (W) */
79 #define AMD7930_BCRB AMD7930_BCTB /* Bc-channel Receive Buffer (R) */
80 #define AMD7930_DSR2 0x07UL /* D-channel Status Register 2 (R) */
81
82 /* Indirect registers in the Main Audio Processor. */
83 struct amd7930_map {
84 __u16 x[8];
85 __u16 r[8];
86 __u16 gx;
87 __u16 gr;
88 __u16 ger;
89 __u16 stgr;
90 __u16 ftgr;
91 __u16 atgr;
92 __u8 mmr1;
93 __u8 mmr2;
94 };
95
96 /* After an amd7930 interrupt, reading the Interrupt Register (ir)
97 * clears the interrupt and returns a bitmask indicating which
98 * interrupt source(s) require service.
99 */
100
101 #define AMR_IR_DTTHRSH 0x01 /* D-channel xmit threshold */
102 #define AMR_IR_DRTHRSH 0x02 /* D-channel recv threshold */
103 #define AMR_IR_DSRI 0x04 /* D-channel packet status */
104 #define AMR_IR_DERI 0x08 /* D-channel error */
105 #define AMR_IR_BBUF 0x10 /* B-channel data xfer */
106 #define AMR_IR_LSRI 0x20 /* LIU status */
107 #define AMR_IR_DSR2I 0x40 /* D-channel buffer status */
108 #define AMR_IR_MLTFRMI 0x80 /* multiframe or PP */
109
110 /* The amd7930 has "indirect registers" which are accessed by writing
111 * the register number into the Command Register and then reading or
112 * writing values from the Data Register as appropriate. We define the
113 * AMR_* macros to be the indirect register numbers and AM_* macros to
114 * be bits in whatever register is referred to.
115 */
116
117 /* Initialization */
118 #define AMR_INIT 0x21
119 #define AM_INIT_ACTIVE 0x01
120 #define AM_INIT_DATAONLY 0x02
121 #define AM_INIT_POWERDOWN 0x03
122 #define AM_INIT_DISABLE_INTS 0x04
123 #define AMR_INIT2 0x20
124 #define AM_INIT2_ENABLE_POWERDOWN 0x20
125 #define AM_INIT2_ENABLE_MULTIFRAME 0x10
126
127 /* Line Interface Unit */
128 #define AMR_LIU_LSR 0xA1
129 #define AM_LIU_LSR_STATE 0x07
130 #define AM_LIU_LSR_F3 0x08
131 #define AM_LIU_LSR_F7 0x10
132 #define AM_LIU_LSR_F8 0x20
133 #define AM_LIU_LSR_HSW 0x40
134 #define AM_LIU_LSR_HSW_CHG 0x80
135 #define AMR_LIU_LPR 0xA2
136 #define AMR_LIU_LMR1 0xA3
137 #define AM_LIU_LMR1_B1_ENABL 0x01
138 #define AM_LIU_LMR1_B2_ENABL 0x02
139 #define AM_LIU_LMR1_F_DISABL 0x04
140 #define AM_LIU_LMR1_FA_DISABL 0x08
141 #define AM_LIU_LMR1_REQ_ACTIV 0x10
142 #define AM_LIU_LMR1_F8_F3 0x20
143 #define AM_LIU_LMR1_LIU_ENABL 0x40
144 #define AMR_LIU_LMR2 0xA4
145 #define AM_LIU_LMR2_DECHO 0x01
146 #define AM_LIU_LMR2_DLOOP 0x02
147 #define AM_LIU_LMR2_DBACKOFF 0x04
148 #define AM_LIU_LMR2_EN_F3_INT 0x08
149 #define AM_LIU_LMR2_EN_F8_INT 0x10
150 #define AM_LIU_LMR2_EN_HSW_INT 0x20
151 #define AM_LIU_LMR2_EN_F7_INT 0x40
152 #define AMR_LIU_2_4 0xA5
153 #define AMR_LIU_MF 0xA6
154 #define AMR_LIU_MFSB 0xA7
155 #define AMR_LIU_MFQB 0xA8
156
157 /* Multiplexor */
158 #define AMR_MUX_MCR1 0x41
159 #define AMR_MUX_MCR2 0x42
160 #define AMR_MUX_MCR3 0x43
161 #define AM_MUX_CHANNEL_B1 0x01
162 #define AM_MUX_CHANNEL_B2 0x02
163 #define AM_MUX_CHANNEL_Ba 0x03
164 #define AM_MUX_CHANNEL_Bb 0x04
165 #define AM_MUX_CHANNEL_Bc 0x05
166 #define AM_MUX_CHANNEL_Bd 0x06
167 #define AM_MUX_CHANNEL_Be 0x07
168 #define AM_MUX_CHANNEL_Bf 0x08
169 #define AMR_MUX_MCR4 0x44
170 #define AM_MUX_MCR4_ENABLE_INTS 0x08
171 #define AM_MUX_MCR4_REVERSE_Bb 0x10
172 #define AM_MUX_MCR4_REVERSE_Bc 0x20
173 #define AMR_MUX_1_4 0x45
174
175 /* Main Audio Processor */
176 #define AMR_MAP_X 0x61
177 #define AMR_MAP_R 0x62
178 #define AMR_MAP_GX 0x63
179 #define AMR_MAP_GR 0x64
180 #define AMR_MAP_GER 0x65
181 #define AMR_MAP_STGR 0x66
182 #define AMR_MAP_FTGR_1_2 0x67
183 #define AMR_MAP_ATGR_1_2 0x68
184 #define AMR_MAP_MMR1 0x69
185 #define AM_MAP_MMR1_ALAW 0x01
186 #define AM_MAP_MMR1_GX 0x02
187 #define AM_MAP_MMR1_GR 0x04
188 #define AM_MAP_MMR1_GER 0x08
189 #define AM_MAP_MMR1_X 0x10
190 #define AM_MAP_MMR1_R 0x20
191 #define AM_MAP_MMR1_STG 0x40
192 #define AM_MAP_MMR1_LOOPBACK 0x80
193 #define AMR_MAP_MMR2 0x6A
194 #define AM_MAP_MMR2_AINB 0x01
195 #define AM_MAP_MMR2_LS 0x02
196 #define AM_MAP_MMR2_ENABLE_DTMF 0x04
197 #define AM_MAP_MMR2_ENABLE_TONEGEN 0x08
198 #define AM_MAP_MMR2_ENABLE_TONERING 0x10
199 #define AM_MAP_MMR2_DISABLE_HIGHPASS 0x20
200 #define AM_MAP_MMR2_DISABLE_AUTOZERO 0x40
201 #define AMR_MAP_1_10 0x6B
202 #define AMR_MAP_MMR3 0x6C
203 #define AMR_MAP_STRA 0x6D
204 #define AMR_MAP_STRF 0x6E
205 #define AMR_MAP_PEAKX 0x70
206 #define AMR_MAP_PEAKR 0x71
207 #define AMR_MAP_15_16 0x72
208
209 /* Data Link Controller */
210 #define AMR_DLC_FRAR_1_2_3 0x81
211 #define AMR_DLC_SRAR_1_2_3 0x82
212 #define AMR_DLC_TAR 0x83
213 #define AMR_DLC_DRLR 0x84
214 #define AMR_DLC_DTCR 0x85
215 #define AMR_DLC_DMR1 0x86
216 #define AMR_DLC_DMR1_DTTHRSH_INT 0x01
217 #define AMR_DLC_DMR1_DRTHRSH_INT 0x02
218 #define AMR_DLC_DMR1_TAR_ENABL 0x04
219 #define AMR_DLC_DMR1_EORP_INT 0x08
220 #define AMR_DLC_DMR1_EN_ADDR1 0x10
221 #define AMR_DLC_DMR1_EN_ADDR2 0x20
222 #define AMR_DLC_DMR1_EN_ADDR3 0x40
223 #define AMR_DLC_DMR1_EN_ADDR4 0x80
224 #define AMR_DLC_DMR1_EN_ADDRS 0xf0
225 #define AMR_DLC_DMR2 0x87
226 #define AMR_DLC_DMR2_RABRT_INT 0x01
227 #define AMR_DLC_DMR2_RESID_INT 0x02
228 #define AMR_DLC_DMR2_COLL_INT 0x04
229 #define AMR_DLC_DMR2_FCS_INT 0x08
230 #define AMR_DLC_DMR2_OVFL_INT 0x10
231 #define AMR_DLC_DMR2_UNFL_INT 0x20
232 #define AMR_DLC_DMR2_OVRN_INT 0x40
233 #define AMR_DLC_DMR2_UNRN_INT 0x80
234 #define AMR_DLC_1_7 0x88
235 #define AMR_DLC_DRCR 0x89
236 #define AMR_DLC_RNGR1 0x8A
237 #define AMR_DLC_RNGR2 0x8B
238 #define AMR_DLC_FRAR4 0x8C
239 #define AMR_DLC_SRAR4 0x8D
240 #define AMR_DLC_DMR3 0x8E
241 #define AMR_DLC_DMR3_VA_INT 0x01
242 #define AMR_DLC_DMR3_EOTP_INT 0x02
243 #define AMR_DLC_DMR3_LBRP_INT 0x04
244 #define AMR_DLC_DMR3_RBA_INT 0x08
245 #define AMR_DLC_DMR3_LBT_INT 0x10
246 #define AMR_DLC_DMR3_TBE_INT 0x20
247 #define AMR_DLC_DMR3_RPLOST_INT 0x40
248 #define AMR_DLC_DMR3_KEEP_FCS 0x80
249 #define AMR_DLC_DMR4 0x8F
250 #define AMR_DLC_DMR4_RCV_1 0x00
251 #define AMR_DLC_DMR4_RCV_2 0x01
252 #define AMR_DLC_DMR4_RCV_4 0x02
253 #define AMR_DLC_DMR4_RCV_8 0x03
254 #define AMR_DLC_DMR4_RCV_16 0x01
255 #define AMR_DLC_DMR4_RCV_24 0x02
256 #define AMR_DLC_DMR4_RCV_30 0x03
257 #define AMR_DLC_DMR4_XMT_1 0x00
258 #define AMR_DLC_DMR4_XMT_2 0x04
259 #define AMR_DLC_DMR4_XMT_4 0x08
260 #define AMR_DLC_DMR4_XMT_8 0x0c
261 #define AMR_DLC_DMR4_XMT_10 0x08
262 #define AMR_DLC_DMR4_XMT_14 0x0c
263 #define AMR_DLC_DMR4_IDLE_MARK 0x00
264 #define AMR_DLC_DMR4_IDLE_FLAG 0x10
265 #define AMR_DLC_DMR4_ADDR_BOTH 0x00
266 #define AMR_DLC_DMR4_ADDR_1ST 0x20
267 #define AMR_DLC_DMR4_ADDR_2ND 0xa0
268 #define AMR_DLC_DMR4_CR_ENABLE 0x40
269 #define AMR_DLC_12_15 0x90
270 #define AMR_DLC_ASR 0x91
271 #define AMR_DLC_EFCR 0x92
272 #define AMR_DLC_EFCR_EXTEND_FIFO 0x01
273 #define AMR_DLC_EFCR_SEC_PKT_INT 0x02
274
275 #define AMR_DSR1_VADDR 0x01
276 #define AMR_DSR1_EORP 0x02
277 #define AMR_DSR1_PKT_IP 0x04
278 #define AMR_DSR1_DECHO_ON 0x08
279 #define AMR_DSR1_DLOOP_ON 0x10
280 #define AMR_DSR1_DBACK_OFF 0x20
281 #define AMR_DSR1_EOTP 0x40
282 #define AMR_DSR1_CXMT_ABRT 0x80
283
284 #define AMR_DSR2_LBRP 0x01
285 #define AMR_DSR2_RBA 0x02
286 #define AMR_DSR2_RPLOST 0x04
287 #define AMR_DSR2_LAST_BYTE 0x08
288 #define AMR_DSR2_TBE 0x10
289 #define AMR_DSR2_MARK_IDLE 0x20
290 #define AMR_DSR2_FLAG_IDLE 0x40
291 #define AMR_DSR2_SECOND_PKT 0x80
292
293 #define AMR_DER_RABRT 0x01
294 #define AMR_DER_RFRAME 0x02
295 #define AMR_DER_COLLISION 0x04
296 #define AMR_DER_FCS 0x08
297 #define AMR_DER_OVFL 0x10
298 #define AMR_DER_UNFL 0x20
299 #define AMR_DER_OVRN 0x40
300 #define AMR_DER_UNRN 0x80
301
302 /* Peripheral Port */
303 #define AMR_PP_PPCR1 0xC0
304 #define AMR_PP_PPSR 0xC1
305 #define AMR_PP_PPIER 0xC2
306 #define AMR_PP_MTDR 0xC3
307 #define AMR_PP_MRDR 0xC3
308 #define AMR_PP_CITDR0 0xC4
309 #define AMR_PP_CIRDR0 0xC4
310 #define AMR_PP_CITDR1 0xC5
311 #define AMR_PP_CIRDR1 0xC5
312 #define AMR_PP_PPCR2 0xC8
313 #define AMR_PP_PPCR3 0xC9
314
315 struct snd_amd7930 {
316 spinlock_t lock;
317 void __iomem *regs;
318 u32 flags;
319 #define AMD7930_FLAG_PLAYBACK 0x00000001
320 #define AMD7930_FLAG_CAPTURE 0x00000002
321
322 struct amd7930_map map;
323
324 struct snd_card *card;
325 struct snd_pcm *pcm;
326 struct snd_pcm_substream *playback_substream;
327 struct snd_pcm_substream *capture_substream;
328
329 /* Playback/Capture buffer state. */
330 unsigned char *p_orig, *p_cur;
331 int p_left;
332 unsigned char *c_orig, *c_cur;
333 int c_left;
334
335 int rgain;
336 int pgain;
337 int mgain;
338
339 struct platform_device *op;
340 unsigned int irq;
341 struct snd_amd7930 *next;
342 };
343
344 static struct snd_amd7930 *amd7930_list;
345
346 /* Idle the AMD7930 chip. The amd->lock is not held. */
amd7930_idle(struct snd_amd7930 * amd)347 static __inline__ void amd7930_idle(struct snd_amd7930 *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. */
amd7930_enable_ints(struct snd_amd7930 * amd)358 static __inline__ void amd7930_enable_ints(struct snd_amd7930 *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. */
amd7930_disable_ints(struct snd_amd7930 * amd)369 static __inline__ void amd7930_disable_ints(struct snd_amd7930 *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 */
__amd7930_write_map(struct snd_amd7930 * amd)382 static void __amd7930_write_map(struct snd_amd7930 *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 */
414 static __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
449 static __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 */
__amd7930_update_map(struct snd_amd7930 * amd)476 static void __amd7930_update_map(struct snd_amd7930 *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
snd_amd7930_interrupt(int irq,void * dev_id)494 static irqreturn_t snd_amd7930_interrupt(int irq, void *dev_id)
495 {
496 struct snd_amd7930 *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
snd_amd7930_trigger(struct snd_amd7930 * amd,unsigned int flag,int cmd)537 static int snd_amd7930_trigger(struct snd_amd7930 *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
snd_amd7930_playback_trigger(struct snd_pcm_substream * substream,int cmd)567 static int snd_amd7930_playback_trigger(struct snd_pcm_substream *substream,
568 int cmd)
569 {
570 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
571 return snd_amd7930_trigger(amd, AMD7930_FLAG_PLAYBACK, cmd);
572 }
573
snd_amd7930_capture_trigger(struct snd_pcm_substream * substream,int cmd)574 static int snd_amd7930_capture_trigger(struct snd_pcm_substream *substream,
575 int cmd)
576 {
577 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
578 return snd_amd7930_trigger(amd, AMD7930_FLAG_CAPTURE, cmd);
579 }
580
snd_amd7930_playback_prepare(struct snd_pcm_substream * substream)581 static int snd_amd7930_playback_prepare(struct snd_pcm_substream *substream)
582 {
583 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
584 struct snd_pcm_runtime *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
snd_amd7930_capture_prepare(struct snd_pcm_substream * substream)613 static int snd_amd7930_capture_prepare(struct snd_pcm_substream *substream)
614 {
615 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
616 struct snd_pcm_runtime *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
snd_amd7930_playback_pointer(struct snd_pcm_substream * substream)645 static snd_pcm_uframes_t snd_amd7930_playback_pointer(struct snd_pcm_substream *substream)
646 {
647 struct snd_amd7930 *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
snd_amd7930_capture_pointer(struct snd_pcm_substream * substream)656 static snd_pcm_uframes_t snd_amd7930_capture_pointer(struct snd_pcm_substream *substream)
657 {
658 struct snd_amd7930 *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. */
669 static const struct snd_pcm_hardware 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
snd_amd7930_playback_open(struct snd_pcm_substream * substream)689 static int snd_amd7930_playback_open(struct snd_pcm_substream *substream)
690 {
691 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
692 struct snd_pcm_runtime *runtime = substream->runtime;
693
694 amd->playback_substream = substream;
695 runtime->hw = snd_amd7930_pcm_hw;
696 return 0;
697 }
698
snd_amd7930_capture_open(struct snd_pcm_substream * substream)699 static int snd_amd7930_capture_open(struct snd_pcm_substream *substream)
700 {
701 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
702 struct snd_pcm_runtime *runtime = substream->runtime;
703
704 amd->capture_substream = substream;
705 runtime->hw = snd_amd7930_pcm_hw;
706 return 0;
707 }
708
snd_amd7930_playback_close(struct snd_pcm_substream * substream)709 static int snd_amd7930_playback_close(struct snd_pcm_substream *substream)
710 {
711 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
712
713 amd->playback_substream = NULL;
714 return 0;
715 }
716
snd_amd7930_capture_close(struct snd_pcm_substream * substream)717 static int snd_amd7930_capture_close(struct snd_pcm_substream *substream)
718 {
719 struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
720
721 amd->capture_substream = NULL;
722 return 0;
723 }
724
725 static const struct snd_pcm_ops snd_amd7930_playback_ops = {
726 .open = snd_amd7930_playback_open,
727 .close = snd_amd7930_playback_close,
728 .prepare = snd_amd7930_playback_prepare,
729 .trigger = snd_amd7930_playback_trigger,
730 .pointer = snd_amd7930_playback_pointer,
731 };
732
733 static const struct snd_pcm_ops snd_amd7930_capture_ops = {
734 .open = snd_amd7930_capture_open,
735 .close = snd_amd7930_capture_close,
736 .prepare = snd_amd7930_capture_prepare,
737 .trigger = snd_amd7930_capture_trigger,
738 .pointer = snd_amd7930_capture_pointer,
739 };
740
snd_amd7930_pcm(struct snd_amd7930 * amd)741 static int snd_amd7930_pcm(struct snd_amd7930 *amd)
742 {
743 struct snd_pcm *pcm;
744 int err;
745
746 if ((err = snd_pcm_new(amd->card,
747 /* ID */ "sun_amd7930",
748 /* device */ 0,
749 /* playback count */ 1,
750 /* capture count */ 1, &pcm)) < 0)
751 return err;
752
753 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_amd7930_playback_ops);
754 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_amd7930_capture_ops);
755
756 pcm->private_data = amd;
757 pcm->info_flags = 0;
758 strcpy(pcm->name, amd->card->shortname);
759 amd->pcm = pcm;
760
761 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
762 NULL, 64*1024, 64*1024);
763
764 return 0;
765 }
766
767 #define VOLUME_MONITOR 0
768 #define VOLUME_CAPTURE 1
769 #define VOLUME_PLAYBACK 2
770
snd_amd7930_info_volume(struct snd_kcontrol * kctl,struct snd_ctl_elem_info * uinfo)771 static int snd_amd7930_info_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo)
772 {
773 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
774 uinfo->count = 1;
775 uinfo->value.integer.min = 0;
776 uinfo->value.integer.max = 255;
777
778 return 0;
779 }
780
snd_amd7930_get_volume(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * ucontrol)781 static int snd_amd7930_get_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
782 {
783 struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
784 int type = kctl->private_value;
785 int *swval;
786
787 switch (type) {
788 case VOLUME_MONITOR:
789 swval = &amd->mgain;
790 break;
791 case VOLUME_CAPTURE:
792 swval = &amd->rgain;
793 break;
794 case VOLUME_PLAYBACK:
795 default:
796 swval = &amd->pgain;
797 break;
798 }
799
800 ucontrol->value.integer.value[0] = *swval;
801
802 return 0;
803 }
804
snd_amd7930_put_volume(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * ucontrol)805 static int snd_amd7930_put_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
806 {
807 struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
808 unsigned long flags;
809 int type = kctl->private_value;
810 int *swval, change;
811
812 switch (type) {
813 case VOLUME_MONITOR:
814 swval = &amd->mgain;
815 break;
816 case VOLUME_CAPTURE:
817 swval = &amd->rgain;
818 break;
819 case VOLUME_PLAYBACK:
820 default:
821 swval = &amd->pgain;
822 break;
823 }
824
825 spin_lock_irqsave(&amd->lock, flags);
826
827 if (*swval != ucontrol->value.integer.value[0]) {
828 *swval = ucontrol->value.integer.value[0] & 0xff;
829 __amd7930_update_map(amd);
830 change = 1;
831 } else
832 change = 0;
833
834 spin_unlock_irqrestore(&amd->lock, flags);
835
836 return change;
837 }
838
839 static const struct snd_kcontrol_new amd7930_controls[] = {
840 {
841 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
842 .name = "Monitor Volume",
843 .index = 0,
844 .info = snd_amd7930_info_volume,
845 .get = snd_amd7930_get_volume,
846 .put = snd_amd7930_put_volume,
847 .private_value = VOLUME_MONITOR,
848 },
849 {
850 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
851 .name = "Capture Volume",
852 .index = 0,
853 .info = snd_amd7930_info_volume,
854 .get = snd_amd7930_get_volume,
855 .put = snd_amd7930_put_volume,
856 .private_value = VOLUME_CAPTURE,
857 },
858 {
859 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
860 .name = "Playback Volume",
861 .index = 0,
862 .info = snd_amd7930_info_volume,
863 .get = snd_amd7930_get_volume,
864 .put = snd_amd7930_put_volume,
865 .private_value = VOLUME_PLAYBACK,
866 },
867 };
868
snd_amd7930_mixer(struct snd_amd7930 * amd)869 static int snd_amd7930_mixer(struct snd_amd7930 *amd)
870 {
871 struct snd_card *card;
872 int idx, err;
873
874 if (snd_BUG_ON(!amd || !amd->card))
875 return -EINVAL;
876
877 card = amd->card;
878 strcpy(card->mixername, card->shortname);
879
880 for (idx = 0; idx < ARRAY_SIZE(amd7930_controls); idx++) {
881 if ((err = snd_ctl_add(card,
882 snd_ctl_new1(&amd7930_controls[idx], amd))) < 0)
883 return err;
884 }
885
886 return 0;
887 }
888
snd_amd7930_free(struct snd_amd7930 * amd)889 static int snd_amd7930_free(struct snd_amd7930 *amd)
890 {
891 struct platform_device *op = amd->op;
892
893 amd7930_idle(amd);
894
895 if (amd->irq)
896 free_irq(amd->irq, amd);
897
898 if (amd->regs)
899 of_iounmap(&op->resource[0], amd->regs,
900 resource_size(&op->resource[0]));
901
902 kfree(amd);
903
904 return 0;
905 }
906
snd_amd7930_dev_free(struct snd_device * device)907 static int snd_amd7930_dev_free(struct snd_device *device)
908 {
909 struct snd_amd7930 *amd = device->device_data;
910
911 return snd_amd7930_free(amd);
912 }
913
914 static const struct snd_device_ops snd_amd7930_dev_ops = {
915 .dev_free = snd_amd7930_dev_free,
916 };
917
snd_amd7930_create(struct snd_card * card,struct platform_device * op,int irq,int dev,struct snd_amd7930 ** ramd)918 static int snd_amd7930_create(struct snd_card *card,
919 struct platform_device *op,
920 int irq, int dev,
921 struct snd_amd7930 **ramd)
922 {
923 struct snd_amd7930 *amd;
924 unsigned long flags;
925 int err;
926
927 *ramd = NULL;
928 amd = kzalloc(sizeof(*amd), GFP_KERNEL);
929 if (amd == NULL)
930 return -ENOMEM;
931
932 spin_lock_init(&amd->lock);
933 amd->card = card;
934 amd->op = op;
935
936 amd->regs = of_ioremap(&op->resource[0], 0,
937 resource_size(&op->resource[0]), "amd7930");
938 if (!amd->regs) {
939 snd_printk(KERN_ERR
940 "amd7930-%d: Unable to map chip registers.\n", dev);
941 kfree(amd);
942 return -EIO;
943 }
944
945 amd7930_idle(amd);
946
947 if (request_irq(irq, snd_amd7930_interrupt,
948 IRQF_SHARED, "amd7930", amd)) {
949 snd_printk(KERN_ERR "amd7930-%d: Unable to grab IRQ %d\n",
950 dev, irq);
951 snd_amd7930_free(amd);
952 return -EBUSY;
953 }
954 amd->irq = irq;
955
956 amd7930_enable_ints(amd);
957
958 spin_lock_irqsave(&amd->lock, flags);
959
960 amd->rgain = 128;
961 amd->pgain = 200;
962 amd->mgain = 0;
963
964 memset(&amd->map, 0, sizeof(amd->map));
965 amd->map.mmr1 = (AM_MAP_MMR1_GX | AM_MAP_MMR1_GER |
966 AM_MAP_MMR1_GR | AM_MAP_MMR1_STG);
967 amd->map.mmr2 = (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB);
968
969 __amd7930_update_map(amd);
970
971 /* Always MUX audio (Ba) to channel Bb. */
972 sbus_writeb(AMR_MUX_MCR1, amd->regs + AMD7930_CR);
973 sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4),
974 amd->regs + AMD7930_DR);
975
976 spin_unlock_irqrestore(&amd->lock, flags);
977
978 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
979 amd, &snd_amd7930_dev_ops);
980 if (err < 0) {
981 snd_amd7930_free(amd);
982 return err;
983 }
984
985 *ramd = amd;
986 return 0;
987 }
988
amd7930_sbus_probe(struct platform_device * op)989 static int amd7930_sbus_probe(struct platform_device *op)
990 {
991 struct resource *rp = &op->resource[0];
992 static int dev_num;
993 struct snd_card *card;
994 struct snd_amd7930 *amd;
995 int err, irq;
996
997 irq = op->archdata.irqs[0];
998
999 if (dev_num >= SNDRV_CARDS)
1000 return -ENODEV;
1001 if (!enable[dev_num]) {
1002 dev_num++;
1003 return -ENOENT;
1004 }
1005
1006 err = snd_card_new(&op->dev, index[dev_num], id[dev_num],
1007 THIS_MODULE, 0, &card);
1008 if (err < 0)
1009 return err;
1010
1011 strcpy(card->driver, "AMD7930");
1012 strcpy(card->shortname, "Sun AMD7930");
1013 sprintf(card->longname, "%s at 0x%02lx:0x%08Lx, irq %d",
1014 card->shortname,
1015 rp->flags & 0xffL,
1016 (unsigned long long)rp->start,
1017 irq);
1018
1019 if ((err = snd_amd7930_create(card, op,
1020 irq, dev_num, &amd)) < 0)
1021 goto out_err;
1022
1023 err = snd_amd7930_pcm(amd);
1024 if (err < 0)
1025 goto out_err;
1026
1027 err = snd_amd7930_mixer(amd);
1028 if (err < 0)
1029 goto out_err;
1030
1031 err = snd_card_register(card);
1032 if (err < 0)
1033 goto out_err;
1034
1035 amd->next = amd7930_list;
1036 amd7930_list = amd;
1037
1038 dev_num++;
1039
1040 return 0;
1041
1042 out_err:
1043 snd_card_free(card);
1044 return err;
1045 }
1046
1047 static const struct of_device_id amd7930_match[] = {
1048 {
1049 .name = "audio",
1050 },
1051 {},
1052 };
1053 MODULE_DEVICE_TABLE(of, amd7930_match);
1054
1055 static struct platform_driver amd7930_sbus_driver = {
1056 .driver = {
1057 .name = "audio",
1058 .of_match_table = amd7930_match,
1059 },
1060 .probe = amd7930_sbus_probe,
1061 };
1062
amd7930_init(void)1063 static int __init amd7930_init(void)
1064 {
1065 return platform_driver_register(&amd7930_sbus_driver);
1066 }
1067
amd7930_exit(void)1068 static void __exit amd7930_exit(void)
1069 {
1070 struct snd_amd7930 *p = amd7930_list;
1071
1072 while (p != NULL) {
1073 struct snd_amd7930 *next = p->next;
1074
1075 snd_card_free(p->card);
1076
1077 p = next;
1078 }
1079
1080 amd7930_list = NULL;
1081
1082 platform_driver_unregister(&amd7930_sbus_driver);
1083 }
1084
1085 module_init(amd7930_init);
1086 module_exit(amd7930_exit);
1087
