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Linux/sound/soc/intel/common/sst-dsp.c

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  1 /*
  2  * Intel Smart Sound Technology (SST) DSP Core Driver
  3  *
  4  * Copyright (C) 2013, Intel Corporation. All rights reserved.
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License version
  8  * 2 as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  */
 16 
 17 #include <linux/slab.h>
 18 #include <linux/export.h>
 19 #include <linux/interrupt.h>
 20 #include <linux/module.h>
 21 #include <linux/platform_device.h>
 22 #include <linux/io.h>
 23 #include <linux/delay.h>
 24 
 25 #include "sst-dsp.h"
 26 #include "sst-dsp-priv.h"
 27 
 28 #define CREATE_TRACE_POINTS
 29 #include <trace/events/intel-sst.h>
 30 
 31 /* Internal generic low-level SST IO functions - can be overidden */
 32 void sst_shim32_write(void __iomem *addr, u32 offset, u32 value)
 33 {
 34         writel(value, addr + offset);
 35 }
 36 EXPORT_SYMBOL_GPL(sst_shim32_write);
 37 
 38 u32 sst_shim32_read(void __iomem *addr, u32 offset)
 39 {
 40         return readl(addr + offset);
 41 }
 42 EXPORT_SYMBOL_GPL(sst_shim32_read);
 43 
 44 void sst_shim32_write64(void __iomem *addr, u32 offset, u64 value)
 45 {
 46         memcpy_toio(addr + offset, &value, sizeof(value));
 47 }
 48 EXPORT_SYMBOL_GPL(sst_shim32_write64);
 49 
 50 u64 sst_shim32_read64(void __iomem *addr, u32 offset)
 51 {
 52         u64 val;
 53 
 54         memcpy_fromio(&val, addr + offset, sizeof(val));
 55         return val;
 56 }
 57 EXPORT_SYMBOL_GPL(sst_shim32_read64);
 58 
 59 static inline void _sst_memcpy_toio_32(volatile u32 __iomem *dest,
 60         u32 *src, size_t bytes)
 61 {
 62         int i, words = bytes >> 2;
 63 
 64         for (i = 0; i < words; i++)
 65                 writel(src[i], dest + i);
 66 }
 67 
 68 static inline void _sst_memcpy_fromio_32(u32 *dest,
 69         const volatile __iomem u32 *src, size_t bytes)
 70 {
 71         int i, words = bytes >> 2;
 72 
 73         for (i = 0; i < words; i++)
 74                 dest[i] = readl(src + i);
 75 }
 76 
 77 void sst_memcpy_toio_32(struct sst_dsp *sst,
 78         void __iomem *dest, void *src, size_t bytes)
 79 {
 80         _sst_memcpy_toio_32(dest, src, bytes);
 81 }
 82 EXPORT_SYMBOL_GPL(sst_memcpy_toio_32);
 83 
 84 void sst_memcpy_fromio_32(struct sst_dsp *sst, void *dest,
 85         void __iomem *src, size_t bytes)
 86 {
 87         _sst_memcpy_fromio_32(dest, src, bytes);
 88 }
 89 EXPORT_SYMBOL_GPL(sst_memcpy_fromio_32);
 90 
 91 /* Public API */
 92 void sst_dsp_shim_write(struct sst_dsp *sst, u32 offset, u32 value)
 93 {
 94         unsigned long flags;
 95 
 96         spin_lock_irqsave(&sst->spinlock, flags);
 97         sst->ops->write(sst->addr.shim, offset, value);
 98         spin_unlock_irqrestore(&sst->spinlock, flags);
 99 }
100 EXPORT_SYMBOL_GPL(sst_dsp_shim_write);
101 
102 u32 sst_dsp_shim_read(struct sst_dsp *sst, u32 offset)
103 {
104         unsigned long flags;
105         u32 val;
106 
107         spin_lock_irqsave(&sst->spinlock, flags);
108         val = sst->ops->read(sst->addr.shim, offset);
109         spin_unlock_irqrestore(&sst->spinlock, flags);
110 
111         return val;
112 }
113 EXPORT_SYMBOL_GPL(sst_dsp_shim_read);
114 
115 void sst_dsp_shim_write64(struct sst_dsp *sst, u32 offset, u64 value)
116 {
117         unsigned long flags;
118 
119         spin_lock_irqsave(&sst->spinlock, flags);
120         sst->ops->write64(sst->addr.shim, offset, value);
121         spin_unlock_irqrestore(&sst->spinlock, flags);
122 }
123 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64);
124 
125 u64 sst_dsp_shim_read64(struct sst_dsp *sst, u32 offset)
126 {
127         unsigned long flags;
128         u64 val;
129 
130         spin_lock_irqsave(&sst->spinlock, flags);
131         val = sst->ops->read64(sst->addr.shim, offset);
132         spin_unlock_irqrestore(&sst->spinlock, flags);
133 
134         return val;
135 }
136 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64);
137 
138 void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value)
139 {
140         sst->ops->write(sst->addr.shim, offset, value);
141 }
142 EXPORT_SYMBOL_GPL(sst_dsp_shim_write_unlocked);
143 
144 u32 sst_dsp_shim_read_unlocked(struct sst_dsp *sst, u32 offset)
145 {
146         return sst->ops->read(sst->addr.shim, offset);
147 }
148 EXPORT_SYMBOL_GPL(sst_dsp_shim_read_unlocked);
149 
150 void sst_dsp_shim_write64_unlocked(struct sst_dsp *sst, u32 offset, u64 value)
151 {
152         sst->ops->write64(sst->addr.shim, offset, value);
153 }
154 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64_unlocked);
155 
156 u64 sst_dsp_shim_read64_unlocked(struct sst_dsp *sst, u32 offset)
157 {
158         return sst->ops->read64(sst->addr.shim, offset);
159 }
160 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64_unlocked);
161 
162 int sst_dsp_shim_update_bits_unlocked(struct sst_dsp *sst, u32 offset,
163                                 u32 mask, u32 value)
164 {
165         bool change;
166         unsigned int old, new;
167         u32 ret;
168 
169         ret = sst_dsp_shim_read_unlocked(sst, offset);
170 
171         old = ret;
172         new = (old & (~mask)) | (value & mask);
173 
174         change = (old != new);
175         if (change)
176                 sst_dsp_shim_write_unlocked(sst, offset, new);
177 
178         return change;
179 }
180 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_unlocked);
181 
182 int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
183                                 u64 mask, u64 value)
184 {
185         bool change;
186         u64 old, new;
187 
188         old = sst_dsp_shim_read64_unlocked(sst, offset);
189 
190         new = (old & (~mask)) | (value & mask);
191 
192         change = (old != new);
193         if (change)
194                 sst_dsp_shim_write64_unlocked(sst, offset, new);
195 
196         return change;
197 }
198 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64_unlocked);
199 
200 /* This is for registers bits with attribute RWC */
201 void sst_dsp_shim_update_bits_forced_unlocked(struct sst_dsp *sst, u32 offset,
202                                 u32 mask, u32 value)
203 {
204         unsigned int old, new;
205         u32 ret;
206 
207         ret = sst_dsp_shim_read_unlocked(sst, offset);
208 
209         old = ret;
210         new = (old & (~mask)) | (value & mask);
211 
212         sst_dsp_shim_write_unlocked(sst, offset, new);
213 }
214 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced_unlocked);
215 
216 int sst_dsp_shim_update_bits(struct sst_dsp *sst, u32 offset,
217                                 u32 mask, u32 value)
218 {
219         unsigned long flags;
220         bool change;
221 
222         spin_lock_irqsave(&sst->spinlock, flags);
223         change = sst_dsp_shim_update_bits_unlocked(sst, offset, mask, value);
224         spin_unlock_irqrestore(&sst->spinlock, flags);
225         return change;
226 }
227 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits);
228 
229 int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
230                                 u64 mask, u64 value)
231 {
232         unsigned long flags;
233         bool change;
234 
235         spin_lock_irqsave(&sst->spinlock, flags);
236         change = sst_dsp_shim_update_bits64_unlocked(sst, offset, mask, value);
237         spin_unlock_irqrestore(&sst->spinlock, flags);
238         return change;
239 }
240 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);
241 
242 /* This is for registers bits with attribute RWC */
243 void sst_dsp_shim_update_bits_forced(struct sst_dsp *sst, u32 offset,
244                                 u32 mask, u32 value)
245 {
246         unsigned long flags;
247 
248         spin_lock_irqsave(&sst->spinlock, flags);
249         sst_dsp_shim_update_bits_forced_unlocked(sst, offset, mask, value);
250         spin_unlock_irqrestore(&sst->spinlock, flags);
251 }
252 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced);
253 
254 int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask,
255                          u32 target, u32 time, char *operation)
256 {
257         u32 reg;
258         unsigned long timeout;
259         int k = 0, s = 500;
260 
261         /*
262          * split the loop into sleeps of varying resolution. more accurately,
263          * the range of wakeups are:
264          * Phase 1(first 5ms): min sleep 0.5ms; max sleep 1ms.
265          * Phase 2:( 5ms to 10ms) : min sleep 0.5ms; max sleep 10ms
266          * (usleep_range (500, 1000) and usleep_range(5000, 10000) are
267          * both possible in this phase depending on whether k > 10 or not).
268          * Phase 3: (beyond 10 ms) min sleep 5ms; max sleep 10ms.
269          */
270 
271         timeout = jiffies + msecs_to_jiffies(time);
272         while (((sst_dsp_shim_read_unlocked(ctx, offset) & mask) != target)
273                 && time_before(jiffies, timeout)) {
274                 k++;
275                 if (k > 10)
276                         s = 5000;
277 
278                 usleep_range(s, 2*s);
279         }
280 
281         reg = sst_dsp_shim_read_unlocked(ctx, offset);
282 
283         if ((reg & mask) == target) {
284                 dev_dbg(ctx->dev, "FW Poll Status: reg=%#x %s successful\n",
285                                         reg, operation);
286 
287                 return 0;
288         }
289 
290         dev_dbg(ctx->dev, "FW Poll Status: reg=%#x %s timedout\n",
291                                         reg, operation);
292         return -ETIME;
293 }
294 EXPORT_SYMBOL_GPL(sst_dsp_register_poll);
295 
296 void sst_dsp_dump(struct sst_dsp *sst)
297 {
298         if (sst->ops->dump)
299                 sst->ops->dump(sst);
300 }
301 EXPORT_SYMBOL_GPL(sst_dsp_dump);
302 
303 void sst_dsp_reset(struct sst_dsp *sst)
304 {
305         if (sst->ops->reset)
306                 sst->ops->reset(sst);
307 }
308 EXPORT_SYMBOL_GPL(sst_dsp_reset);
309 
310 int sst_dsp_boot(struct sst_dsp *sst)
311 {
312         if (sst->ops->boot)
313                 sst->ops->boot(sst);
314 
315         return 0;
316 }
317 EXPORT_SYMBOL_GPL(sst_dsp_boot);
318 
319 int sst_dsp_wake(struct sst_dsp *sst)
320 {
321         if (sst->ops->wake)
322                 return sst->ops->wake(sst);
323 
324         return 0;
325 }
326 EXPORT_SYMBOL_GPL(sst_dsp_wake);
327 
328 void sst_dsp_sleep(struct sst_dsp *sst)
329 {
330         if (sst->ops->sleep)
331                 sst->ops->sleep(sst);
332 }
333 EXPORT_SYMBOL_GPL(sst_dsp_sleep);
334 
335 void sst_dsp_stall(struct sst_dsp *sst)
336 {
337         if (sst->ops->stall)
338                 sst->ops->stall(sst);
339 }
340 EXPORT_SYMBOL_GPL(sst_dsp_stall);
341 
342 void sst_dsp_ipc_msg_tx(struct sst_dsp *dsp, u32 msg)
343 {
344         sst_dsp_shim_write_unlocked(dsp, SST_IPCX, msg | SST_IPCX_BUSY);
345         trace_sst_ipc_msg_tx(msg);
346 }
347 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_tx);
348 
349 u32 sst_dsp_ipc_msg_rx(struct sst_dsp *dsp)
350 {
351         u32 msg;
352 
353         msg = sst_dsp_shim_read_unlocked(dsp, SST_IPCX);
354         trace_sst_ipc_msg_rx(msg);
355 
356         return msg;
357 }
358 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_rx);
359 
360 int sst_dsp_mailbox_init(struct sst_dsp *sst, u32 inbox_offset, size_t inbox_size,
361         u32 outbox_offset, size_t outbox_size)
362 {
363         sst->mailbox.in_base = sst->addr.lpe + inbox_offset;
364         sst->mailbox.out_base = sst->addr.lpe + outbox_offset;
365         sst->mailbox.in_size = inbox_size;
366         sst->mailbox.out_size = outbox_size;
367         return 0;
368 }
369 EXPORT_SYMBOL_GPL(sst_dsp_mailbox_init);
370 
371 void sst_dsp_outbox_write(struct sst_dsp *sst, void *message, size_t bytes)
372 {
373         u32 i;
374 
375         trace_sst_ipc_outbox_write(bytes);
376 
377         memcpy_toio(sst->mailbox.out_base, message, bytes);
378 
379         for (i = 0; i < bytes; i += 4)
380                 trace_sst_ipc_outbox_wdata(i, *(u32 *)(message + i));
381 }
382 EXPORT_SYMBOL_GPL(sst_dsp_outbox_write);
383 
384 void sst_dsp_outbox_read(struct sst_dsp *sst, void *message, size_t bytes)
385 {
386         u32 i;
387 
388         trace_sst_ipc_outbox_read(bytes);
389 
390         memcpy_fromio(message, sst->mailbox.out_base, bytes);
391 
392         for (i = 0; i < bytes; i += 4)
393                 trace_sst_ipc_outbox_rdata(i, *(u32 *)(message + i));
394 }
395 EXPORT_SYMBOL_GPL(sst_dsp_outbox_read);
396 
397 void sst_dsp_inbox_write(struct sst_dsp *sst, void *message, size_t bytes)
398 {
399         u32 i;
400 
401         trace_sst_ipc_inbox_write(bytes);
402 
403         memcpy_toio(sst->mailbox.in_base, message, bytes);
404 
405         for (i = 0; i < bytes; i += 4)
406                 trace_sst_ipc_inbox_wdata(i, *(u32 *)(message + i));
407 }
408 EXPORT_SYMBOL_GPL(sst_dsp_inbox_write);
409 
410 void sst_dsp_inbox_read(struct sst_dsp *sst, void *message, size_t bytes)
411 {
412         u32 i;
413 
414         trace_sst_ipc_inbox_read(bytes);
415 
416         memcpy_fromio(message, sst->mailbox.in_base, bytes);
417 
418         for (i = 0; i < bytes; i += 4)
419                 trace_sst_ipc_inbox_rdata(i, *(u32 *)(message + i));
420 }
421 EXPORT_SYMBOL_GPL(sst_dsp_inbox_read);
422 
423 /* Module information */
424 MODULE_AUTHOR("Liam Girdwood");
425 MODULE_DESCRIPTION("Intel SST Core");
426 MODULE_LICENSE("GPL v2");
427 

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