1 // SPDX-License-Identifier: GPL-2.0-only
3 * sst_dsp.c - Intel SST Driver for audio engine
5 * Copyright (C) 2008-14 Intel Corp
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
14 * This file contains all dsp controlling functions like firmware download,
15 * setting/resetting dsp cores, etc
17 #include <linux/pci.h>
18 #include <linux/delay.h>
20 #include <linux/sched.h>
21 #include <linux/firmware.h>
22 #include <linux/dmaengine.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/pm_qos.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/soc.h>
28 #include <sound/compress_driver.h>
29 #include <asm/platform_sst_audio.h>
30 #include "../sst-mfld-platform.h"
33 void memcpy32_toio(void __iomem *dst, const void *src, int count)
35 /* __iowrite32_copy uses 32-bit count values so divide by 4 for
36 * right count in words
38 __iowrite32_copy(dst, src, count / 4);
41 void memcpy32_fromio(void *dst, const void __iomem *src, int count)
43 /* __ioread32_copy uses 32-bit count values so divide by 4 for
44 * right count in words
46 __ioread32_copy(dst, src, count / 4);
50 * intel_sst_reset_dsp_mrfld - Resetting SST DSP
51 * @sst_drv_ctx: intel_sst_drv context pointer
53 * This resets DSP in case of MRFLD platfroms
55 int intel_sst_reset_dsp_mrfld(struct intel_sst_drv *sst_drv_ctx)
57 union config_status_reg_mrfld csr;
59 dev_dbg(sst_drv_ctx->dev, "sst: Resetting the DSP in mrfld\n");
60 csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
62 dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
65 sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
66 csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
68 dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
71 sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
73 csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
74 dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
79 * sst_start_mrfld - Start the SST DSP processor
80 * @sst_drv_ctx: intel_sst_drv context pointer
82 * This starts the DSP in MERRIFIELD platfroms
84 int sst_start_mrfld(struct intel_sst_drv *sst_drv_ctx)
86 union config_status_reg_mrfld csr;
88 dev_dbg(sst_drv_ctx->dev, "sst: Starting the DSP in mrfld LALALALA\n");
89 csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
90 dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
93 sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
95 csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
96 dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
98 csr.part.xt_snoop = 1;
100 sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
102 csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
103 dev_dbg(sst_drv_ctx->dev, "sst: Starting the DSP_merrifield:%llx\n",
108 static int sst_validate_fw_image(struct intel_sst_drv *ctx, unsigned long size,
109 struct fw_module_header **module, u32 *num_modules)
111 struct sst_fw_header *header;
112 const void *sst_fw_in_mem = ctx->fw_in_mem;
114 dev_dbg(ctx->dev, "Enter\n");
116 /* Read the header information from the data pointer */
117 header = (struct sst_fw_header *)sst_fw_in_mem;
119 "header sign=%s size=%x modules=%x fmt=%x size=%zx\n",
120 header->signature, header->file_size, header->modules,
121 header->file_format, sizeof(*header));
124 if ((strncmp(header->signature, SST_FW_SIGN, 4) != 0) ||
125 (size != header->file_size + sizeof(*header))) {
126 /* Invalid FW signature */
127 dev_err(ctx->dev, "InvalidFW sign/filesize mismatch\n");
130 *num_modules = header->modules;
131 *module = (void *)sst_fw_in_mem + sizeof(*header);
137 * sst_fill_memcpy_list - Fill the memcpy list
139 * @memcpy_list: List to be filled
140 * @destn: Destination addr to be filled in the list
141 * @src: Source addr to be filled in the list
142 * @size: Size to be filled in the list
144 * Adds the node to the list after required fields
145 * are populated in the node
147 static int sst_fill_memcpy_list(struct list_head *memcpy_list,
148 void *destn, const void *src, u32 size, bool is_io)
150 struct sst_memcpy_list *listnode;
152 listnode = kzalloc(sizeof(*listnode), GFP_KERNEL);
153 if (listnode == NULL)
155 listnode->dstn = destn;
157 listnode->size = size;
158 listnode->is_io = is_io;
159 list_add_tail(&listnode->memcpylist, memcpy_list);
165 * sst_parse_module_memcpy - Parse audio FW modules and populate the memcpy list
167 * @sst_drv_ctx : driver context
168 * @module : FW module header
169 * @memcpy_list : Pointer to the list to be populated
170 * Create the memcpy list as the number of block to be copied
171 * returns error or 0 if module sizes are proper
173 static int sst_parse_module_memcpy(struct intel_sst_drv *sst_drv_ctx,
174 struct fw_module_header *module, struct list_head *memcpy_list)
176 struct fw_block_info *block;
179 void __iomem *ram_iomem;
181 dev_dbg(sst_drv_ctx->dev, "module sign %s size %x blocks %x type %x\n",
182 module->signature, module->mod_size,
183 module->blocks, module->type);
184 dev_dbg(sst_drv_ctx->dev, "module entrypoint 0x%x\n", module->entry_point);
186 block = (void *)module + sizeof(*module);
188 for (count = 0; count < module->blocks; count++) {
189 if (block->size <= 0) {
190 dev_err(sst_drv_ctx->dev, "block size invalid\n");
193 switch (block->type) {
195 ram_iomem = sst_drv_ctx->iram;
198 ram_iomem = sst_drv_ctx->dram;
201 ram_iomem = sst_drv_ctx->ddr;
203 case SST_CUSTOM_INFO:
204 block = (void *)block + sizeof(*block) + block->size;
207 dev_err(sst_drv_ctx->dev, "wrong ram type0x%x in block0x%x\n",
212 ret_val = sst_fill_memcpy_list(memcpy_list,
213 ram_iomem + block->ram_offset,
214 (void *)block + sizeof(*block), block->size, 1);
218 block = (void *)block + sizeof(*block) + block->size;
224 * sst_parse_fw_memcpy - parse the firmware image & populate the list for memcpy
226 * @ctx : pointer to drv context
227 * @size : size of the firmware
228 * @fw_list : pointer to list_head to be populated
229 * This function parses the FW image and saves the parsed image in the list
232 static int sst_parse_fw_memcpy(struct intel_sst_drv *ctx, unsigned long size,
233 struct list_head *fw_list)
235 struct fw_module_header *module;
236 u32 count, num_modules;
239 ret_val = sst_validate_fw_image(ctx, size, &module, &num_modules);
243 for (count = 0; count < num_modules; count++) {
244 ret_val = sst_parse_module_memcpy(ctx, module, fw_list);
247 module = (void *)module + sizeof(*module) + module->mod_size;
254 * sst_do_memcpy - function initiates the memcpy
256 * @memcpy_list: Pter to memcpy list on which the memcpy needs to be initiated
258 * Triggers the memcpy
260 static void sst_do_memcpy(struct list_head *memcpy_list)
262 struct sst_memcpy_list *listnode;
264 list_for_each_entry(listnode, memcpy_list, memcpylist) {
266 memcpy32_toio((void __iomem *)listnode->dstn,
267 listnode->src, listnode->size);
269 memcpy(listnode->dstn, listnode->src, listnode->size);
273 void sst_memcpy_free_resources(struct intel_sst_drv *sst_drv_ctx)
275 struct sst_memcpy_list *listnode, *tmplistnode;
278 list_for_each_entry_safe(listnode, tmplistnode,
279 &sst_drv_ctx->memcpy_list, memcpylist) {
280 list_del(&listnode->memcpylist);
285 static int sst_cache_and_parse_fw(struct intel_sst_drv *sst,
286 const struct firmware *fw)
290 sst->fw_in_mem = kzalloc(fw->size, GFP_KERNEL);
291 if (!sst->fw_in_mem) {
295 dev_dbg(sst->dev, "copied fw to %p", sst->fw_in_mem);
296 dev_dbg(sst->dev, "phys: %lx", (unsigned long)virt_to_phys(sst->fw_in_mem));
297 memcpy(sst->fw_in_mem, fw->data, fw->size);
298 retval = sst_parse_fw_memcpy(sst, fw->size, &sst->memcpy_list);
300 dev_err(sst->dev, "Failed to parse fw\n");
301 kfree(sst->fw_in_mem);
302 sst->fw_in_mem = NULL;
306 release_firmware(fw);
311 void sst_firmware_load_cb(const struct firmware *fw, void *context)
313 struct intel_sst_drv *ctx = context;
315 dev_dbg(ctx->dev, "Enter\n");
318 dev_err(ctx->dev, "request fw failed\n");
322 mutex_lock(&ctx->sst_lock);
324 if (ctx->sst_state != SST_RESET ||
325 ctx->fw_in_mem != NULL) {
326 release_firmware(fw);
327 mutex_unlock(&ctx->sst_lock);
331 dev_dbg(ctx->dev, "Request Fw completed\n");
332 sst_cache_and_parse_fw(ctx, fw);
333 mutex_unlock(&ctx->sst_lock);
337 * sst_request_fw - requests audio fw from kernel and saves a copy
339 * This function requests the SST FW from the kernel, parses it and
340 * saves a copy in the driver context
342 static int sst_request_fw(struct intel_sst_drv *sst)
345 const struct firmware *fw;
347 retval = request_firmware(&fw, sst->firmware_name, sst->dev);
349 dev_err(sst->dev, "request fw failed %d\n", retval);
353 dev_err(sst->dev, "fw is returning as null\n");
356 mutex_lock(&sst->sst_lock);
357 retval = sst_cache_and_parse_fw(sst, fw);
358 mutex_unlock(&sst->sst_lock);
364 * Writing the DDR physical base to DCCM offset
365 * so that FW can use it to setup TLB
367 static void sst_dccm_config_write(void __iomem *dram_base,
368 unsigned int ddr_base)
373 addr = (void __iomem *)(dram_base + MRFLD_FW_DDR_BASE_OFFSET);
374 memcpy32_toio(addr, (void *)&ddr_base, sizeof(u32));
375 bss_reset |= (1 << MRFLD_FW_BSS_RESET_BIT);
376 addr = (void __iomem *)(dram_base + MRFLD_FW_FEATURE_BASE_OFFSET);
377 memcpy32_toio(addr, &bss_reset, sizeof(u32));
381 void sst_post_download_mrfld(struct intel_sst_drv *ctx)
383 sst_dccm_config_write(ctx->dram, ctx->ddr_base);
384 dev_dbg(ctx->dev, "config written to DCCM\n");
388 * sst_load_fw - function to load FW into DSP
389 * @sst_drv_ctx: intel_sst_drv context pointer
391 * Transfers the FW to DSP using dma/memcpy
393 int sst_load_fw(struct intel_sst_drv *sst_drv_ctx)
396 struct sst_block *block;
398 dev_dbg(sst_drv_ctx->dev, "sst_load_fw\n");
400 if (sst_drv_ctx->sst_state != SST_RESET)
403 if (!sst_drv_ctx->fw_in_mem) {
404 dev_dbg(sst_drv_ctx->dev, "sst: FW not in memory retry to download\n");
405 ret_val = sst_request_fw(sst_drv_ctx);
410 block = sst_create_block(sst_drv_ctx, 0, FW_DWNL_ID);
414 /* Prevent C-states beyond C6 */
415 cpu_latency_qos_update_request(sst_drv_ctx->qos, 0);
417 sst_drv_ctx->sst_state = SST_FW_LOADING;
419 ret_val = sst_drv_ctx->ops->reset(sst_drv_ctx);
423 sst_do_memcpy(&sst_drv_ctx->memcpy_list);
425 /* Write the DRAM/DCCM config before enabling FW */
426 if (sst_drv_ctx->ops->post_download)
427 sst_drv_ctx->ops->post_download(sst_drv_ctx);
429 /* bring sst out of reset */
430 ret_val = sst_drv_ctx->ops->start(sst_drv_ctx);
434 ret_val = sst_wait_timeout(sst_drv_ctx, block);
436 dev_err(sst_drv_ctx->dev, "fw download failed %d\n" , ret_val);
437 /* FW download failed due to timeout */
444 /* Re-enable Deeper C-states beyond C6 */
445 cpu_latency_qos_update_request(sst_drv_ctx->qos, PM_QOS_DEFAULT_VALUE);
446 sst_free_block(sst_drv_ctx, block);
447 dev_dbg(sst_drv_ctx->dev, "fw load successful!!!\n");
449 if (sst_drv_ctx->ops->restore_dsp_context)
450 sst_drv_ctx->ops->restore_dsp_context();
451 sst_drv_ctx->sst_state = SST_FW_RUNNING;