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9012c954 VK |
1 | /* |
2 | * sst_dsp.c - Intel SST Driver for audio engine | |
3 | * | |
4 | * Copyright (C) 2008-14 Intel Corp | |
5 | * Authors: Vinod Koul <vinod.koul@intel.com> | |
6 | * Harsha Priya <priya.harsha@intel.com> | |
7 | * Dharageswari R <dharageswari.r@intel.com> | |
8 | * KP Jeeja <jeeja.kp@intel.com> | |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; version 2 of the License. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
21 | * | |
22 | * This file contains all dsp controlling functions like firmware download, | |
23 | * setting/resetting dsp cores, etc | |
24 | */ | |
25 | #include <linux/pci.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/firmware.h> | |
30 | #include <linux/dmaengine.h> | |
31 | #include <linux/pm_runtime.h> | |
32 | #include <linux/pm_qos.h> | |
33 | #include <sound/core.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/soc.h> | |
36 | #include <sound/compress_driver.h> | |
37 | #include <asm/platform_sst_audio.h> | |
38 | #include "../sst-mfld-platform.h" | |
39 | #include "sst.h" | |
2106241a | 40 | #include "../common/sst-dsp.h" |
9012c954 | 41 | |
5c88b4e9 SP |
42 | void memcpy32_toio(void __iomem *dst, const void *src, int count) |
43 | { | |
44 | /* __iowrite32_copy uses 32-bit count values so divide by 4 for | |
45 | * right count in words | |
46 | */ | |
47 | __iowrite32_copy(dst, src, count/4); | |
48 | } | |
49 | ||
50 | void memcpy32_fromio(void *dst, const void __iomem *src, int count) | |
9012c954 | 51 | { |
b3baaa47 VK |
52 | /* __iowrite32_copy uses 32-bit count values so divide by 4 for |
53 | * right count in words | |
54 | */ | |
55 | __iowrite32_copy(dst, src, count/4); | |
9012c954 VK |
56 | } |
57 | ||
58 | /** | |
59 | * intel_sst_reset_dsp_mrfld - Resetting SST DSP | |
60 | * | |
61 | * This resets DSP in case of MRFLD platfroms | |
62 | */ | |
63 | int intel_sst_reset_dsp_mrfld(struct intel_sst_drv *sst_drv_ctx) | |
64 | { | |
65 | union config_status_reg_mrfld csr; | |
66 | ||
67 | dev_dbg(sst_drv_ctx->dev, "sst: Resetting the DSP in mrfld\n"); | |
68 | csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR); | |
69 | ||
70 | dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full); | |
71 | ||
72 | csr.full |= 0x7; | |
73 | sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full); | |
74 | csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR); | |
75 | ||
76 | dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full); | |
77 | ||
78 | csr.full &= ~(0x1); | |
79 | sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full); | |
80 | ||
81 | csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR); | |
82 | dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full); | |
83 | return 0; | |
84 | } | |
85 | ||
86 | /** | |
87 | * sst_start_merrifield - Start the SST DSP processor | |
88 | * | |
89 | * This starts the DSP in MERRIFIELD platfroms | |
90 | */ | |
91 | int sst_start_mrfld(struct intel_sst_drv *sst_drv_ctx) | |
92 | { | |
93 | union config_status_reg_mrfld csr; | |
94 | ||
95 | dev_dbg(sst_drv_ctx->dev, "sst: Starting the DSP in mrfld LALALALA\n"); | |
96 | csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR); | |
97 | dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full); | |
98 | ||
99 | csr.full |= 0x7; | |
100 | sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full); | |
101 | ||
102 | csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR); | |
103 | dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full); | |
104 | ||
105 | csr.part.xt_snoop = 1; | |
106 | csr.full &= ~(0x5); | |
107 | sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full); | |
108 | ||
109 | csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR); | |
110 | dev_dbg(sst_drv_ctx->dev, "sst: Starting the DSP_merrifield:%llx\n", | |
111 | csr.full); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static int sst_validate_fw_image(struct intel_sst_drv *ctx, unsigned long size, | |
116 | struct fw_module_header **module, u32 *num_modules) | |
117 | { | |
118 | struct sst_fw_header *header; | |
119 | const void *sst_fw_in_mem = ctx->fw_in_mem; | |
120 | ||
121 | dev_dbg(ctx->dev, "Enter\n"); | |
122 | ||
123 | /* Read the header information from the data pointer */ | |
124 | header = (struct sst_fw_header *)sst_fw_in_mem; | |
125 | dev_dbg(ctx->dev, | |
126 | "header sign=%s size=%x modules=%x fmt=%x size=%zx\n", | |
127 | header->signature, header->file_size, header->modules, | |
128 | header->file_format, sizeof(*header)); | |
129 | ||
130 | /* verify FW */ | |
131 | if ((strncmp(header->signature, SST_FW_SIGN, 4) != 0) || | |
132 | (size != header->file_size + sizeof(*header))) { | |
133 | /* Invalid FW signature */ | |
134 | dev_err(ctx->dev, "InvalidFW sign/filesize mismatch\n"); | |
135 | return -EINVAL; | |
136 | } | |
137 | *num_modules = header->modules; | |
138 | *module = (void *)sst_fw_in_mem + sizeof(*header); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | /* | |
144 | * sst_fill_memcpy_list - Fill the memcpy list | |
145 | * | |
146 | * @memcpy_list: List to be filled | |
147 | * @destn: Destination addr to be filled in the list | |
148 | * @src: Source addr to be filled in the list | |
149 | * @size: Size to be filled in the list | |
150 | * | |
151 | * Adds the node to the list after required fields | |
152 | * are populated in the node | |
153 | */ | |
154 | static int sst_fill_memcpy_list(struct list_head *memcpy_list, | |
155 | void *destn, const void *src, u32 size, bool is_io) | |
156 | { | |
157 | struct sst_memcpy_list *listnode; | |
158 | ||
159 | listnode = kzalloc(sizeof(*listnode), GFP_KERNEL); | |
160 | if (listnode == NULL) | |
161 | return -ENOMEM; | |
162 | listnode->dstn = destn; | |
163 | listnode->src = src; | |
164 | listnode->size = size; | |
165 | listnode->is_io = is_io; | |
166 | list_add_tail(&listnode->memcpylist, memcpy_list); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | /** | |
172 | * sst_parse_module_memcpy - Parse audio FW modules and populate the memcpy list | |
173 | * | |
174 | * @sst_drv_ctx : driver context | |
175 | * @module : FW module header | |
176 | * @memcpy_list : Pointer to the list to be populated | |
177 | * Create the memcpy list as the number of block to be copied | |
178 | * returns error or 0 if module sizes are proper | |
179 | */ | |
180 | static int sst_parse_module_memcpy(struct intel_sst_drv *sst_drv_ctx, | |
181 | struct fw_module_header *module, struct list_head *memcpy_list) | |
182 | { | |
183 | struct fw_block_info *block; | |
184 | u32 count; | |
185 | int ret_val = 0; | |
186 | void __iomem *ram_iomem; | |
187 | ||
188 | dev_dbg(sst_drv_ctx->dev, "module sign %s size %x blocks %x type %x\n", | |
189 | module->signature, module->mod_size, | |
190 | module->blocks, module->type); | |
191 | dev_dbg(sst_drv_ctx->dev, "module entrypoint 0x%x\n", module->entry_point); | |
192 | ||
193 | block = (void *)module + sizeof(*module); | |
194 | ||
195 | for (count = 0; count < module->blocks; count++) { | |
196 | if (block->size <= 0) { | |
197 | dev_err(sst_drv_ctx->dev, "block size invalid\n"); | |
198 | return -EINVAL; | |
199 | } | |
200 | switch (block->type) { | |
201 | case SST_IRAM: | |
202 | ram_iomem = sst_drv_ctx->iram; | |
203 | break; | |
204 | case SST_DRAM: | |
205 | ram_iomem = sst_drv_ctx->dram; | |
206 | break; | |
207 | case SST_DDR: | |
208 | ram_iomem = sst_drv_ctx->ddr; | |
209 | break; | |
210 | case SST_CUSTOM_INFO: | |
211 | block = (void *)block + sizeof(*block) + block->size; | |
212 | continue; | |
213 | default: | |
214 | dev_err(sst_drv_ctx->dev, "wrong ram type0x%x in block0x%x\n", | |
215 | block->type, count); | |
216 | return -EINVAL; | |
217 | } | |
218 | ||
219 | ret_val = sst_fill_memcpy_list(memcpy_list, | |
220 | ram_iomem + block->ram_offset, | |
221 | (void *)block + sizeof(*block), block->size, 1); | |
222 | if (ret_val) | |
223 | return ret_val; | |
224 | ||
225 | block = (void *)block + sizeof(*block) + block->size; | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
230 | /** | |
231 | * sst_parse_fw_memcpy - parse the firmware image & populate the list for memcpy | |
232 | * | |
233 | * @ctx : pointer to drv context | |
234 | * @size : size of the firmware | |
235 | * @fw_list : pointer to list_head to be populated | |
236 | * This function parses the FW image and saves the parsed image in the list | |
237 | * for memcpy | |
238 | */ | |
239 | static int sst_parse_fw_memcpy(struct intel_sst_drv *ctx, unsigned long size, | |
240 | struct list_head *fw_list) | |
241 | { | |
242 | struct fw_module_header *module; | |
243 | u32 count, num_modules; | |
244 | int ret_val; | |
245 | ||
246 | ret_val = sst_validate_fw_image(ctx, size, &module, &num_modules); | |
247 | if (ret_val) | |
248 | return ret_val; | |
249 | ||
250 | for (count = 0; count < num_modules; count++) { | |
251 | ret_val = sst_parse_module_memcpy(ctx, module, fw_list); | |
252 | if (ret_val) | |
253 | return ret_val; | |
254 | module = (void *)module + sizeof(*module) + module->mod_size; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | /** | |
261 | * sst_do_memcpy - function initiates the memcpy | |
262 | * | |
263 | * @memcpy_list: Pter to memcpy list on which the memcpy needs to be initiated | |
264 | * | |
265 | * Triggers the memcpy | |
266 | */ | |
267 | static void sst_do_memcpy(struct list_head *memcpy_list) | |
268 | { | |
269 | struct sst_memcpy_list *listnode; | |
270 | ||
271 | list_for_each_entry(listnode, memcpy_list, memcpylist) { | |
272 | if (listnode->is_io == true) | |
273 | memcpy32_toio((void __iomem *)listnode->dstn, | |
274 | listnode->src, listnode->size); | |
275 | else | |
276 | memcpy(listnode->dstn, listnode->src, listnode->size); | |
277 | } | |
278 | } | |
279 | ||
280 | void sst_memcpy_free_resources(struct intel_sst_drv *sst_drv_ctx) | |
281 | { | |
282 | struct sst_memcpy_list *listnode, *tmplistnode; | |
283 | ||
284 | /* Free the list */ | |
285 | if (!list_empty(&sst_drv_ctx->memcpy_list)) { | |
286 | list_for_each_entry_safe(listnode, tmplistnode, | |
287 | &sst_drv_ctx->memcpy_list, memcpylist) { | |
288 | list_del(&listnode->memcpylist); | |
289 | kfree(listnode); | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
294 | static int sst_cache_and_parse_fw(struct intel_sst_drv *sst, | |
295 | const struct firmware *fw) | |
296 | { | |
297 | int retval = 0; | |
298 | ||
299 | sst->fw_in_mem = kzalloc(fw->size, GFP_KERNEL); | |
300 | if (!sst->fw_in_mem) { | |
301 | retval = -ENOMEM; | |
302 | goto end_release; | |
303 | } | |
304 | dev_dbg(sst->dev, "copied fw to %p", sst->fw_in_mem); | |
305 | dev_dbg(sst->dev, "phys: %lx", (unsigned long)virt_to_phys(sst->fw_in_mem)); | |
306 | memcpy(sst->fw_in_mem, fw->data, fw->size); | |
307 | retval = sst_parse_fw_memcpy(sst, fw->size, &sst->memcpy_list); | |
308 | if (retval) { | |
309 | dev_err(sst->dev, "Failed to parse fw\n"); | |
310 | kfree(sst->fw_in_mem); | |
311 | sst->fw_in_mem = NULL; | |
312 | } | |
313 | ||
314 | end_release: | |
315 | release_firmware(fw); | |
316 | return retval; | |
317 | ||
318 | } | |
319 | ||
320 | void sst_firmware_load_cb(const struct firmware *fw, void *context) | |
321 | { | |
322 | struct intel_sst_drv *ctx = context; | |
323 | ||
324 | dev_dbg(ctx->dev, "Enter\n"); | |
325 | ||
326 | if (fw == NULL) { | |
327 | dev_err(ctx->dev, "request fw failed\n"); | |
328 | return; | |
329 | } | |
330 | ||
331 | mutex_lock(&ctx->sst_lock); | |
332 | ||
333 | if (ctx->sst_state != SST_RESET || | |
334 | ctx->fw_in_mem != NULL) { | |
4e3461d3 | 335 | release_firmware(fw); |
9012c954 VK |
336 | mutex_unlock(&ctx->sst_lock); |
337 | return; | |
338 | } | |
339 | ||
340 | dev_dbg(ctx->dev, "Request Fw completed\n"); | |
341 | sst_cache_and_parse_fw(ctx, fw); | |
342 | mutex_unlock(&ctx->sst_lock); | |
343 | } | |
344 | ||
345 | /* | |
346 | * sst_request_fw - requests audio fw from kernel and saves a copy | |
347 | * | |
348 | * This function requests the SST FW from the kernel, parses it and | |
349 | * saves a copy in the driver context | |
350 | */ | |
351 | static int sst_request_fw(struct intel_sst_drv *sst) | |
352 | { | |
353 | int retval = 0; | |
9012c954 VK |
354 | const struct firmware *fw; |
355 | ||
5794b7ec | 356 | retval = request_firmware(&fw, sst->firmware_name, sst->dev); |
9012c954 VK |
357 | if (fw == NULL) { |
358 | dev_err(sst->dev, "fw is returning as null\n"); | |
359 | return -EINVAL; | |
360 | } | |
361 | if (retval) { | |
362 | dev_err(sst->dev, "request fw failed %d\n", retval); | |
363 | return retval; | |
364 | } | |
365 | mutex_lock(&sst->sst_lock); | |
366 | retval = sst_cache_and_parse_fw(sst, fw); | |
367 | mutex_unlock(&sst->sst_lock); | |
368 | ||
369 | return retval; | |
370 | } | |
371 | ||
372 | /* | |
373 | * Writing the DDR physical base to DCCM offset | |
374 | * so that FW can use it to setup TLB | |
375 | */ | |
376 | static void sst_dccm_config_write(void __iomem *dram_base, | |
377 | unsigned int ddr_base) | |
378 | { | |
379 | void __iomem *addr; | |
380 | u32 bss_reset = 0; | |
381 | ||
382 | addr = (void __iomem *)(dram_base + MRFLD_FW_DDR_BASE_OFFSET); | |
383 | memcpy32_toio(addr, (void *)&ddr_base, sizeof(u32)); | |
384 | bss_reset |= (1 << MRFLD_FW_BSS_RESET_BIT); | |
385 | addr = (void __iomem *)(dram_base + MRFLD_FW_FEATURE_BASE_OFFSET); | |
386 | memcpy32_toio(addr, &bss_reset, sizeof(u32)); | |
387 | ||
388 | } | |
389 | ||
390 | void sst_post_download_mrfld(struct intel_sst_drv *ctx) | |
391 | { | |
392 | sst_dccm_config_write(ctx->dram, ctx->ddr_base); | |
393 | dev_dbg(ctx->dev, "config written to DCCM\n"); | |
394 | } | |
395 | ||
396 | /** | |
397 | * sst_load_fw - function to load FW into DSP | |
398 | * Transfers the FW to DSP using dma/memcpy | |
399 | */ | |
400 | int sst_load_fw(struct intel_sst_drv *sst_drv_ctx) | |
401 | { | |
402 | int ret_val = 0; | |
403 | struct sst_block *block; | |
404 | ||
405 | dev_dbg(sst_drv_ctx->dev, "sst_load_fw\n"); | |
406 | ||
407 | if (sst_drv_ctx->sst_state != SST_RESET || | |
408 | sst_drv_ctx->sst_state == SST_SHUTDOWN) | |
409 | return -EAGAIN; | |
410 | ||
411 | if (!sst_drv_ctx->fw_in_mem) { | |
412 | dev_dbg(sst_drv_ctx->dev, "sst: FW not in memory retry to download\n"); | |
413 | ret_val = sst_request_fw(sst_drv_ctx); | |
414 | if (ret_val) | |
415 | return ret_val; | |
416 | } | |
417 | ||
418 | BUG_ON(!sst_drv_ctx->fw_in_mem); | |
419 | block = sst_create_block(sst_drv_ctx, 0, FW_DWNL_ID); | |
420 | if (block == NULL) | |
421 | return -ENOMEM; | |
422 | ||
423 | /* Prevent C-states beyond C6 */ | |
424 | pm_qos_update_request(sst_drv_ctx->qos, 0); | |
425 | ||
426 | sst_drv_ctx->sst_state = SST_FW_LOADING; | |
427 | ||
428 | ret_val = sst_drv_ctx->ops->reset(sst_drv_ctx); | |
429 | if (ret_val) | |
430 | goto restore; | |
431 | ||
432 | sst_do_memcpy(&sst_drv_ctx->memcpy_list); | |
433 | ||
434 | /* Write the DRAM/DCCM config before enabling FW */ | |
435 | if (sst_drv_ctx->ops->post_download) | |
436 | sst_drv_ctx->ops->post_download(sst_drv_ctx); | |
437 | ||
438 | /* bring sst out of reset */ | |
439 | ret_val = sst_drv_ctx->ops->start(sst_drv_ctx); | |
440 | if (ret_val) | |
441 | goto restore; | |
442 | ||
443 | ret_val = sst_wait_timeout(sst_drv_ctx, block); | |
444 | if (ret_val) { | |
445 | dev_err(sst_drv_ctx->dev, "fw download failed %d\n" , ret_val); | |
446 | /* FW download failed due to timeout */ | |
447 | ret_val = -EBUSY; | |
448 | ||
449 | } | |
450 | ||
451 | ||
452 | restore: | |
453 | /* Re-enable Deeper C-states beyond C6 */ | |
454 | pm_qos_update_request(sst_drv_ctx->qos, PM_QOS_DEFAULT_VALUE); | |
455 | sst_free_block(sst_drv_ctx, block); | |
456 | dev_dbg(sst_drv_ctx->dev, "fw load successful!!!\n"); | |
457 | ||
458 | if (sst_drv_ctx->ops->restore_dsp_context) | |
459 | sst_drv_ctx->ops->restore_dsp_context(); | |
460 | sst_drv_ctx->sst_state = SST_FW_RUNNING; | |
461 | return ret_val; | |
462 | } | |
463 |