drivers/staging/intel_sst/intel_sst_dsp.c

   1 /*
   2  *  intel_sst_dsp.c - Intel SST Driver for audio engine
   3  *
   4  *  Copyright (C) 2008-10       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  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  23  *
  24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  25  *
  26  *  This driver exposes the audio engine functionalities to the ALSA
  27  *      and middleware.
  28  *
  29  *  This file contains all dsp controlling functions like firmware download,
  30  * setting/resetting dsp cores, etc
  31  */
  32
  33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #include <linux/pci.h>
  36 #include <linux/fs.h>
  37 #include <linux/firmware.h>
  38 #include "intel_sst.h"
  39 #include "intel_sst_ioctl.h"
  40 #include "intel_sst_fw_ipc.h"
  41 #include "intel_sst_common.h"
  42
  43
  44 /**
  45  * intel_sst_reset_dsp_mrst - Resetting SST DSP
  46  *
  47  * This resets DSP in case of MRST platfroms
  48  */
  49 static int intel_sst_reset_dsp_mrst(void)
  50 {
  51         union config_status_reg csr;
  52
  53         pr_debug("Resetting the DSP in mrst\n");
  54         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
  55         csr.full |= 0x382;
  56         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
  57         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
  58         csr.part.strb_cntr_rst = 0;
  59         csr.part.run_stall = 0x1;
  60         csr.part.bypass = 0x7;
  61         csr.part.sst_reset = 0x1;
  62         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
  63         return 0;
  64 }
  65
  66 /**
  67  * intel_sst_reset_dsp_medfield - Resetting SST DSP
  68  *
  69  * This resets DSP in case of Medfield platfroms
  70  */
  71 static int intel_sst_reset_dsp_medfield(void)
  72 {
  73         union config_status_reg csr;
  74
  75         pr_debug("Resetting the DSP in medfield\n");
  76         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
  77         csr.full |= 0x382;
  78         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
  79
  80         return 0;
  81 }
  82
  83 /**
  84  * sst_start_mrst - Start the SST DSP processor
  85  *
  86  * This starts the DSP in MRST platfroms
  87  */
  88 static int sst_start_mrst(void)
  89 {
  90         union config_status_reg csr;
  91
  92         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
  93         csr.part.bypass = 0;
  94         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
  95         csr.part.run_stall = 0;
  96         csr.part.sst_reset = 0;
  97         csr.part.strb_cntr_rst = 1;
  98         pr_debug("Setting SST to execute_mrst 0x%x\n", csr.full);
  99         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 100
 101         return 0;
 102 }
 103
 104 /**
 105  * sst_start_medfield - Start the SST DSP processor
 106  *
 107  * This starts the DSP in MRST platfroms
 108  */
 109 static int sst_start_medfield(void)
 110 {
 111         union config_status_reg csr;
 112
 113         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
 114         csr.part.bypass = 0;
 115         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 116         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
 117         csr.part.mfld_strb = 1;
 118         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 119         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
 120         csr.part.run_stall = 0;
 121         csr.part.sst_reset = 0;
 122         pr_debug("Starting the DSP_medfld %x\n", csr.full);
 123         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 124         pr_debug("Starting the DSP_medfld\n");
 125
 126         return 0;
 127 }
 128
 129 /**
 130  * sst_parse_module - Parse audio FW modules
 131  *
 132  * @module: FW module header
 133  *
 134  * Parses modules that need to be placed in SST IRAM and DRAM
 135  * returns error or 0 if module sizes are proper
 136  */
 137 static int sst_parse_module(struct fw_module_header *module)
 138 {
 139         struct dma_block_info *block;
 140         u32 count;
 141         void __iomem *ram;
 142
 143         pr_debug("module sign %s size %x blocks %x type %x\n",
 144                         module->signature, module->mod_size,
 145                         module->blocks, module->type);
 146         pr_debug("module entrypoint 0x%x\n", module->entry_point);
 147
 148         block = (void *)module + sizeof(*module);
 149
 150         for (count = 0; count < module->blocks; count++) {
 151                 if (block->size <= 0) {
 152                         pr_err("block size invalid\n");
 153                         return -EINVAL;
 154                 }
 155                 switch (block->type) {
 156                 case SST_IRAM:
 157                         ram = sst_drv_ctx->iram;
 158                         break;
 159                 case SST_DRAM:
 160                         ram = sst_drv_ctx->dram;
 161                         break;
 162                 default:
 163                         pr_err("wrong ram type0x%x in block0x%x\n",
 164                                         block->type, count);
 165                         return -EINVAL;
 166                 }
 167                 memcpy_toio(ram + block->ram_offset,
 168                                 (void *)block + sizeof(*block), block->size);
 169                 block = (void *)block + sizeof(*block) + block->size;
 170         }
 171         return 0;
 172 }
 173
 174 /**
 175  * sst_parse_fw_image - parse and load FW
 176  *
 177  * @sst_fw: pointer to audio fw
 178  *
 179  * This function is called to parse and download the FW image
 180  */
 181 static int sst_parse_fw_image(const struct firmware *sst_fw)
 182 {
 183         struct fw_header *header;
 184         u32 count;
 185         int ret_val;
 186         struct fw_module_header *module;
 187
 188         BUG_ON(!sst_fw);
 189
 190         /* Read the header information from the data pointer */
 191         header = (struct fw_header *)sst_fw->data;
 192
 193         /* verify FW */
 194         if ((strncmp(header->signature, SST_FW_SIGN, 4) != 0) ||
 195                         (sst_fw->size != header->file_size + sizeof(*header))) {
 196                 /* Invalid FW signature */
 197                 pr_err("Invalid FW sign/filesize mismatch\n");
 198                 return -EINVAL;
 199         }
 200         pr_debug("header sign=%s size=%x modules=%x fmt=%x size=%x\n",
 201                         header->signature, header->file_size, header->modules,
 202                         header->file_format, sizeof(*header));
 203         module = (void *)sst_fw->data + sizeof(*header);
 204         for (count = 0; count < header->modules; count++) {
 205                 /* module */
 206                 ret_val = sst_parse_module(module);
 207                 if (ret_val)
 208                         return ret_val;
 209                 module = (void *)module + sizeof(*module) + module->mod_size ;
 210         }
 211
 212         return 0;
 213 }
 214
 215 /**
 216  * sst_load_fw - function to load FW into DSP
 217  *
 218  * @fw: Pointer to driver loaded FW
 219  * @context: driver context
 220  *
 221  * This function is called by OS when the FW is loaded into kernel
 222  */
 223 int sst_load_fw(const struct firmware *fw, void *context)
 224 {
 225         int ret_val;
 226
 227         pr_debug("load_fw called\n");
 228         BUG_ON(!fw);
 229
 230         if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
 231                 ret_val = intel_sst_reset_dsp_mrst();
 232         else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
 233                 ret_val = intel_sst_reset_dsp_medfield();
 234         if (ret_val)
 235                 return ret_val;
 236
 237         ret_val = sst_parse_fw_image(fw);
 238         if (ret_val)
 239                 return ret_val;
 240         mutex_lock(&sst_drv_ctx->sst_lock);
 241         sst_drv_ctx->sst_state = SST_FW_LOADED;
 242         mutex_unlock(&sst_drv_ctx->sst_lock);
 243         /*  7. ask scu to reset the bypass bits */
 244         /*  8.bring sst out of reset  */
 245         if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
 246                 ret_val = sst_start_mrst();
 247         else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
 248                 ret_val = sst_start_medfield();
 249         if (ret_val)
 250                 return ret_val;
 251
 252         pr_debug("fw loaded successful!!!\n");
 253         return ret_val;
 254 }
 255
 256 /*This function is called when any codec/post processing library
 257  needs to be downloaded*/
 258 static int sst_download_library(const struct firmware *fw_lib,
 259                                 struct snd_sst_lib_download_info *lib)
 260 {
 261         /* send IPC message and wait */
 262         int i;
 263         u8 pvt_id;
 264         struct ipc_post *msg = NULL;
 265         union config_status_reg csr;
 266         struct snd_sst_str_type str_type = {0};
 267         int retval = 0;
 268
 269         if (sst_create_large_msg(&msg))
 270                 return -ENOMEM;
 271
 272         pvt_id = sst_assign_pvt_id(sst_drv_ctx);
 273         i = sst_get_block_stream(sst_drv_ctx);
 274         pr_debug("alloc block allocated = %d, pvt_id %d\n", i, pvt_id);
 275         if (i < 0) {
 276                 kfree(msg);
 277                 return -ENOMEM;
 278         }
 279         sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
 280         sst_fill_header(&msg->header, IPC_IA_PREP_LIB_DNLD, 1, pvt_id);
 281         msg->header.part.data = sizeof(u32) + sizeof(str_type);
 282         str_type.codec_type = lib->dload_lib.lib_info.lib_type;
 283         /*str_type.pvt_id = pvt_id;*/
 284         memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
 285         memcpy(msg->mailbox_data + sizeof(u32), &str_type, sizeof(str_type));
 286         spin_lock(&sst_drv_ctx->list_spin_lock);
 287         list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
 288         spin_unlock(&sst_drv_ctx->list_spin_lock);
 289         sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 290         retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
 291         if (retval) {
 292                 /* error */
 293                 sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
 294                 pr_err("Prep codec downloaded failed %d\n",
 295                                 retval);
 296                 return -EIO;
 297         }
 298         pr_debug("FW responded, ready for download now...\n");
 299         /* downloading on success */
 300         mutex_lock(&sst_drv_ctx->sst_lock);
 301         sst_drv_ctx->sst_state = SST_FW_LOADED;
 302         mutex_unlock(&sst_drv_ctx->sst_lock);
 303         csr.full = readl(sst_drv_ctx->shim + SST_CSR);
 304         csr.part.run_stall = 1;
 305         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 306
 307         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
 308         csr.part.bypass = 0x7;
 309         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 310
 311         sst_parse_fw_image(fw_lib);
 312
 313         /* set the FW to running again */
 314         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
 315         csr.part.bypass = 0x0;
 316         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 317
 318         csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
 319         csr.part.run_stall = 0;
 320         sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 321
 322         /* send download complete and wait */
 323         if (sst_create_large_msg(&msg)) {
 324                 sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
 325                 return -ENOMEM;
 326         }
 327
 328         sst_fill_header(&msg->header, IPC_IA_LIB_DNLD_CMPLT, 1, pvt_id);
 329         sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
 330         msg->header.part.data = sizeof(u32) + sizeof(*lib);
 331         lib->pvt_id = pvt_id;
 332         memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
 333         memcpy(msg->mailbox_data + sizeof(u32), lib, sizeof(*lib));
 334         spin_lock(&sst_drv_ctx->list_spin_lock);
 335         list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
 336         spin_unlock(&sst_drv_ctx->list_spin_lock);
 337         sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 338         pr_debug("Waiting for FW response Download complete\n");
 339         sst_drv_ctx->alloc_block[i].ops_block.condition = false;
 340         retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
 341         if (retval) {
 342                 /* error */
 343                 mutex_lock(&sst_drv_ctx->sst_lock);
 344                 sst_drv_ctx->sst_state = SST_UN_INIT;
 345                 mutex_unlock(&sst_drv_ctx->sst_lock);
 346                 sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
 347                 return -EIO;
 348         }
 349
 350         pr_debug("FW success on Download complete\n");
 351         sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
 352         mutex_lock(&sst_drv_ctx->sst_lock);
 353         sst_drv_ctx->sst_state = SST_FW_RUNNING;
 354         mutex_unlock(&sst_drv_ctx->sst_lock);
 355         return 0;
 356
 357 }
 358
 359 /* This function is called before downloading the codec/postprocessing
 360 library is set for download to SST DSP*/
 361 static int sst_validate_library(const struct firmware *fw_lib,
 362                 struct lib_slot_info *slot,
 363                 u32 *entry_point)
 364 {
 365         struct fw_header *header;
 366         struct fw_module_header *module;
 367         struct dma_block_info *block;
 368         unsigned int n_blk, isize = 0, dsize = 0;
 369         int err = 0;
 370
 371         header = (struct fw_header *)fw_lib->data;
 372         if (header->modules != 1) {
 373                 pr_err("Module no mismatch found\n");
 374                 err = -EINVAL;
 375                 goto exit;
 376         }
 377         module = (void *)fw_lib->data + sizeof(*header);
 378         *entry_point = module->entry_point;
 379         pr_debug("Module entry point 0x%x\n", *entry_point);
 380         pr_debug("Module Sign %s, Size 0x%x, Blocks 0x%x Type 0x%x\n",
 381                         module->signature, module->mod_size,
 382                         module->blocks, module->type);
 383
 384         block = (void *)module + sizeof(*module);
 385         for (n_blk = 0; n_blk < module->blocks; n_blk++) {
 386                 switch (block->type) {
 387                 case SST_IRAM:
 388                         isize += block->size;
 389                         break;
 390                 case SST_DRAM:
 391                         dsize += block->size;
 392                         break;
 393                 default:
 394                         pr_err("Invalid block type for 0x%x\n", n_blk);
 395                         err = -EINVAL;
 396                         goto exit;
 397                 }
 398                 block = (void *)block + sizeof(*block) + block->size;
 399         }
 400         if (isize > slot->iram_size || dsize > slot->dram_size) {
 401                 pr_err("library exceeds size allocated\n");
 402                 err = -EINVAL;
 403                 goto exit;
 404         } else
 405                 pr_debug("Library is safe for download...\n");
 406
 407         pr_debug("iram 0x%x, dram 0x%x, iram 0x%x, dram 0x%x\n",
 408                         isize, dsize, slot->iram_size, slot->dram_size);
 409 exit:
 410         return err;
 411
 412 }
 413
 414 /* This function is called when FW requests for a particular library download
 415 This function prepares the library to download*/
 416 int sst_load_library(struct snd_sst_lib_download *lib, u8 ops)
 417 {
 418         char buf[20];
 419         const char *type, *dir;
 420         int len = 0, error = 0;
 421         u32 entry_point;
 422         const struct firmware *fw_lib;
 423         struct snd_sst_lib_download_info dload_info = {{{0},},};
 424
 425         memset(buf, 0, sizeof(buf));
 426
 427         pr_debug("Lib Type 0x%x, Slot 0x%x, ops 0x%x\n",
 428                         lib->lib_info.lib_type, lib->slot_info.slot_num, ops);
 429         pr_debug("Version 0x%x, name %s, caps 0x%x media type 0x%x\n",
 430                 lib->lib_info.lib_version, lib->lib_info.lib_name,
 431                 lib->lib_info.lib_caps, lib->lib_info.media_type);
 432
 433         pr_debug("IRAM Size 0x%x, offset 0x%x\n",
 434                 lib->slot_info.iram_size, lib->slot_info.iram_offset);
 435         pr_debug("DRAM Size 0x%x, offset 0x%x\n",
 436                 lib->slot_info.dram_size, lib->slot_info.dram_offset);
 437
 438         switch (lib->lib_info.lib_type) {
 439         case SST_CODEC_TYPE_MP3:
 440                 type = "mp3_";
 441                 break;
 442         case SST_CODEC_TYPE_AAC:
 443                 type = "aac_";
 444                 break;
 445         case SST_CODEC_TYPE_AACP:
 446                 type = "aac_v1_";
 447                 break;
 448         case SST_CODEC_TYPE_eAACP:
 449                 type = "aac_v2_";
 450                 break;
 451         case SST_CODEC_TYPE_WMA9:
 452                 type = "wma9_";
 453                 break;
 454         default:
 455                 pr_err("Invalid codec type\n");
 456                 error = -EINVAL;
 457                 goto wake;
 458         }
 459
 460         if (ops == STREAM_OPS_CAPTURE)
 461                 dir = "enc_";
 462         else
 463                 dir = "dec_";
 464         len = strlen(type) + strlen(dir);
 465         strncpy(buf, type, sizeof(buf)-1);
 466         strncpy(buf + strlen(type), dir, sizeof(buf)-strlen(type)-1);
 467         len += snprintf(buf + len, sizeof(buf) - len, "%d",
 468                         lib->slot_info.slot_num);
 469         len += snprintf(buf + len, sizeof(buf) - len, ".bin");
 470
 471         pr_debug("Requesting %s\n", buf);
 472
 473         error = request_firmware(&fw_lib, buf, &sst_drv_ctx->pci->dev);
 474         if (error) {
 475                 pr_err("library load failed %d\n", error);
 476                 goto wake;
 477         }
 478         error = sst_validate_library(fw_lib, &lib->slot_info, &entry_point);
 479         if (error)
 480                 goto wake_free;
 481
 482         lib->mod_entry_pt = entry_point;
 483         memcpy(&dload_info.dload_lib, lib, sizeof(*lib));
 484         error = sst_download_library(fw_lib, &dload_info);
 485         if (error)
 486                 goto wake_free;
 487
 488         /* lib is downloaded and init send alloc again */
 489         pr_debug("Library is downloaded now...\n");
 490 wake_free:
 491         /* sst_wake_up_alloc_block(sst_drv_ctx, pvt_id, error, NULL); */
 492         release_firmware(fw_lib);
 493 wake:
 494         return error;
 495 }
 496