--- /dev/null
+/*
+ * intel_sst_dsp.c - Intel SST Driver for audio engine
+ *
+ * Copyright (C) 2008-10 Intel Corp
+ * Authors: Vinod Koul <vinod.koul@intel.com>
+ * Harsha Priya <priya.harsha@intel.com>
+ * Dharageswari R <dharageswari.r@intel.com>
+ * KP Jeeja <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This driver exposes the audio engine functionalities to the ALSA
+ * and middleware.
+ *
+ * This file contains all dsp controlling functions like firmware download,
+ * setting/resetting dsp cores, etc
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/pci.h>
+#include <linux/fs.h>
+#include <linux/firmware.h>
+#include "intel_sst.h"
+#include "intel_sst_ioctl.h"
+#include "intel_sst_fw_ipc.h"
+#include "intel_sst_common.h"
+
+
+/**
+ * intel_sst_reset_dsp_mrst - Resetting SST DSP
+ *
+ * This resets DSP in case of MRST platfroms
+ */
+static int intel_sst_reset_dsp_mrst(void)
+{
+ union config_status_reg csr;
+
+ pr_debug("Resetting the DSP in mrst\n");
+ csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+ csr.full |= 0x382;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+ csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+ csr.part.strb_cntr_rst = 0;
+ csr.part.run_stall = 0x1;
+ csr.part.bypass = 0x7;
+ csr.part.sst_reset = 0x1;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+ return 0;
+}
+
+/**
+ * intel_sst_reset_dsp_medfield - Resetting SST DSP
+ *
+ * This resets DSP in case of Medfield platfroms
+ */
+static int intel_sst_reset_dsp_medfield(void)
+{
+ union config_status_reg csr;
+
+ pr_debug("Resetting the DSP in medfield\n");
+ csr.full = 0x048303E2;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+ return 0;
+}
+
+/**
+ * sst_start_mrst - Start the SST DSP processor
+ *
+ * This starts the DSP in MRST platfroms
+ */
+static int sst_start_mrst(void)
+{
+ union config_status_reg csr;
+
+ csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+ csr.part.bypass = 0;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+ csr.part.run_stall = 0;
+ csr.part.sst_reset = 0;
+ csr.part.strb_cntr_rst = 1;
+ pr_debug("Setting SST to execute_mrst 0x%x\n", csr.full);
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+ return 0;
+}
+
+/**
+ * sst_start_medfield - Start the SST DSP processor
+ *
+ * This starts the DSP in MRST platfroms
+ */
+static int sst_start_medfield(void)
+{
+ union config_status_reg csr;
+
+ csr.full = 0x04830062;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+ csr.full = 0x04830063;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+ csr.full = 0x04830061;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+ pr_debug("Starting the DSP_medfld\n");
+
+ return 0;
+}
+
+/**
+ * sst_parse_module - Parse audio FW modules
+ *
+ * @module: FW module header
+ *
+ * Parses modules that need to be placed in SST IRAM and DRAM
+ * returns error or 0 if module sizes are proper
+ */
+static int sst_parse_module(struct fw_module_header *module)
+{
+ struct dma_block_info *block;
+ u32 count;
+ void __iomem *ram;
+
+ pr_debug("module sign %s size %x blocks %x type %x\n",
+ module->signature, module->mod_size,
+ module->blocks, module->type);
+ pr_debug("module entrypoint 0x%x\n", module->entry_point);
+
+ block = (void *)module + sizeof(*module);
+
+ for (count = 0; count < module->blocks; count++) {
+ if (block->size <= 0) {
+ pr_err("block size invalid\n");
+ return -EINVAL;
+ }
+ switch (block->type) {
+ case SST_IRAM:
+ ram = sst_drv_ctx->iram;
+ break;
+ case SST_DRAM:
+ ram = sst_drv_ctx->dram;
+ break;
+ default:
+ pr_err("wrong ram type0x%x in block0x%x\n",
+ block->type, count);
+ return -EINVAL;
+ }
+ memcpy_toio(ram + block->ram_offset,
+ (void *)block + sizeof(*block), block->size);
+ block = (void *)block + sizeof(*block) + block->size;
+ }
+ return 0;
+}
+
+/**
+ * sst_parse_fw_image - parse and load FW
+ *
+ * @sst_fw: pointer to audio fw
+ *
+ * This function is called to parse and download the FW image
+ */
+static int sst_parse_fw_image(const struct firmware *sst_fw)
+{
+ struct fw_header *header;
+ u32 count;
+ int ret_val;
+ struct fw_module_header *module;
+
+ BUG_ON(!sst_fw);
+
+ /* Read the header information from the data pointer */
+ header = (struct fw_header *)sst_fw->data;
+
+ /* verify FW */
+ if ((strncmp(header->signature, SST_FW_SIGN, 4) != 0) ||
+ (sst_fw->size != header->file_size + sizeof(*header))) {
+ /* Invalid FW signature */
+ pr_err("Invalid FW sign/filesize mismatch\n");
+ return -EINVAL;
+ }
+ pr_debug("header sign=%s size=%x modules=%x fmt=%x size=%x\n",
+ header->signature, header->file_size, header->modules,
+ header->file_format, sizeof(*header));
+ module = (void *)sst_fw->data + sizeof(*header);
+ for (count = 0; count < header->modules; count++) {
+ /* module */
+ ret_val = sst_parse_module(module);
+ if (ret_val)
+ return ret_val;
+ module = (void *)module + sizeof(*module) + module->mod_size ;
+ }
+
+ return 0;
+}
+
+/**
+ * sst_load_fw - function to load FW into DSP
+ *
+ * @fw: Pointer to driver loaded FW
+ * @context: driver context
+ *
+ * This function is called by OS when the FW is loaded into kernel
+ */
+int sst_load_fw(const struct firmware *fw, void *context)
+{
+ int ret_val;
+
+ pr_debug("load_fw called\n");
+ BUG_ON(!fw);
+
+ if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
+ ret_val = intel_sst_reset_dsp_mrst();
+ else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
+ ret_val = intel_sst_reset_dsp_medfield();
+ if (ret_val)
+ return ret_val;
+
+ ret_val = sst_parse_fw_image(fw);
+ if (ret_val)
+ return ret_val;
+ mutex_lock(&sst_drv_ctx->sst_lock);
+ sst_drv_ctx->sst_state = SST_FW_LOADED;
+ mutex_unlock(&sst_drv_ctx->sst_lock);
+ /* 7. ask scu to reset the bypass bits */
+ /* 8.bring sst out of reset */
+ if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
+ ret_val = sst_start_mrst();
+ else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
+ ret_val = sst_start_medfield();
+ if (ret_val)
+ return ret_val;
+
+ pr_debug("fw loaded successful!!!\n");
+ return ret_val;
+}
+
+/*This function is called when any codec/post processing library
+ needs to be downloaded*/
+static int sst_download_library(const struct firmware *fw_lib,
+ struct snd_sst_lib_download_info *lib)
+{
+ /* send IPC message and wait */
+ int i;
+ u8 pvt_id;
+ struct ipc_post *msg = NULL;
+ union config_status_reg csr;
+ struct snd_sst_str_type str_type = {0};
+ int retval = 0;
+
+ if (sst_create_large_msg(&msg))
+ return -ENOMEM;
+
+ pvt_id = sst_assign_pvt_id(sst_drv_ctx);
+ i = sst_get_block_stream(sst_drv_ctx);
+ pr_debug("alloc block allocated = %d, pvt_id %d\n", i, pvt_id);
+ if (i < 0) {
+ kfree(msg);
+ return -ENOMEM;
+ }
+ sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
+ sst_fill_header(&msg->header, IPC_IA_PREP_LIB_DNLD, 1, pvt_id);
+ msg->header.part.data = sizeof(u32) + sizeof(str_type);
+ str_type.codec_type = lib->dload_lib.lib_info.lib_type;
+ /*str_type.pvt_id = pvt_id;*/
+ memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
+ memcpy(msg->mailbox_data + sizeof(u32), &str_type, sizeof(str_type));
+ spin_lock(&sst_drv_ctx->list_spin_lock);
+ list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
+ spin_unlock(&sst_drv_ctx->list_spin_lock);
+ sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
+ retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
+ if (retval) {
+ /* error */
+ sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+ pr_err("Prep codec downloaded failed %d\n",
+ retval);
+ return -EIO;
+ }
+ pr_debug("FW responded, ready for download now...\n");
+ /* downloading on success */
+ mutex_lock(&sst_drv_ctx->sst_lock);
+ sst_drv_ctx->sst_state = SST_FW_LOADED;
+ mutex_unlock(&sst_drv_ctx->sst_lock);
+ csr.full = readl(sst_drv_ctx->shim + SST_CSR);
+ csr.part.run_stall = 1;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+ csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+ csr.part.bypass = 0x7;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+ sst_parse_fw_image(fw_lib);
+
+ /* set the FW to running again */
+ csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+ csr.part.bypass = 0x0;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+ csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+ csr.part.run_stall = 0;
+ sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+ /* send download complete and wait */
+ if (sst_create_large_msg(&msg)) {
+ sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+ return -ENOMEM;
+ }
+
+ sst_fill_header(&msg->header, IPC_IA_LIB_DNLD_CMPLT, 1, pvt_id);
+ sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
+ msg->header.part.data = sizeof(u32) + sizeof(*lib);
+ lib->pvt_id = pvt_id;
+ memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
+ memcpy(msg->mailbox_data + sizeof(u32), lib, sizeof(*lib));
+ spin_lock(&sst_drv_ctx->list_spin_lock);
+ list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
+ spin_unlock(&sst_drv_ctx->list_spin_lock);
+ sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
+ pr_debug("Waiting for FW response Download complete\n");
+ sst_drv_ctx->alloc_block[i].ops_block.condition = false;
+ retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
+ if (retval) {
+ /* error */
+ mutex_lock(&sst_drv_ctx->sst_lock);
+ sst_drv_ctx->sst_state = SST_UN_INIT;
+ mutex_unlock(&sst_drv_ctx->sst_lock);
+ sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+ return -EIO;
+ }
+
+ pr_debug("FW success on Download complete\n");
+ sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+ mutex_lock(&sst_drv_ctx->sst_lock);
+ sst_drv_ctx->sst_state = SST_FW_RUNNING;
+ mutex_unlock(&sst_drv_ctx->sst_lock);
+ return 0;
+
+}
+
+/* This function is called befoer downloading the codec/postprocessing
+library is set for download to SST DSP*/
+static int sst_validate_library(const struct firmware *fw_lib,
+ struct lib_slot_info *slot,
+ u32 *entry_point)
+{
+ struct fw_header *header;
+ struct fw_module_header *module;
+ struct dma_block_info *block;
+ unsigned int n_blk, isize = 0, dsize = 0;
+ int err = 0;
+
+ header = (struct fw_header *)fw_lib->data;
+ if (header->modules != 1) {
+ pr_err("Module no mismatch found\n");
+ err = -EINVAL;
+ goto exit;
+ }
+ module = (void *)fw_lib->data + sizeof(*header);
+ *entry_point = module->entry_point;
+ pr_debug("Module entry point 0x%x\n", *entry_point);
+ pr_debug("Module Sign %s, Size 0x%x, Blocks 0x%x Type 0x%x\n",
+ module->signature, module->mod_size,
+ module->blocks, module->type);
+
+ block = (void *)module + sizeof(*module);
+ for (n_blk = 0; n_blk < module->blocks; n_blk++) {
+ switch (block->type) {
+ case SST_IRAM:
+ isize += block->size;
+ break;
+ case SST_DRAM:
+ dsize += block->size;
+ break;
+ default:
+ pr_err("Invalid block type for 0x%x\n", n_blk);
+ err = -EINVAL;
+ goto exit;
+ }
+ block = (void *)block + sizeof(*block) + block->size;
+ }
+ if (isize > slot->iram_size || dsize > slot->dram_size) {
+ pr_err("library exceeds size allocated\n");
+ err = -EINVAL;
+ goto exit;
+ } else
+ pr_debug("Library is safe for download...\n");
+
+ pr_debug("iram 0x%x, dram 0x%x, iram 0x%x, dram 0x%x\n",
+ isize, dsize, slot->iram_size, slot->dram_size);
+exit:
+ return err;
+
+}
+
+/* This function is called when FW requests for a particular libary download
+This function prepares the library to download*/
+int sst_load_library(struct snd_sst_lib_download *lib, u8 ops)
+{
+ char buf[20];
+ const char *type, *dir;
+ int len = 0, error = 0;
+ u32 entry_point;
+ const struct firmware *fw_lib;
+ struct snd_sst_lib_download_info dload_info = {{{0},},};
+
+ memset(buf, 0, sizeof(buf));
+
+ pr_debug("Lib Type 0x%x, Slot 0x%x, ops 0x%x\n",
+ lib->lib_info.lib_type, lib->slot_info.slot_num, ops);
+ pr_debug("Version 0x%x, name %s, caps 0x%x media type 0x%x\n",
+ lib->lib_info.lib_version, lib->lib_info.lib_name,
+ lib->lib_info.lib_caps, lib->lib_info.media_type);
+
+ pr_debug("IRAM Size 0x%x, offset 0x%x\n",
+ lib->slot_info.iram_size, lib->slot_info.iram_offset);
+ pr_debug("DRAM Size 0x%x, offset 0x%x\n",
+ lib->slot_info.dram_size, lib->slot_info.dram_offset);
+
+ switch (lib->lib_info.lib_type) {
+ case SST_CODEC_TYPE_MP3:
+ type = "mp3_";
+ break;
+ case SST_CODEC_TYPE_AAC:
+ type = "aac_";
+ break;
+ case SST_CODEC_TYPE_AACP:
+ type = "aac_v1_";
+ break;
+ case SST_CODEC_TYPE_eAACP:
+ type = "aac_v2_";
+ break;
+ case SST_CODEC_TYPE_WMA9:
+ type = "wma9_";
+ break;
+ default:
+ pr_err("Invalid codec type\n");
+ error = -EINVAL;
+ goto wake;
+ }
+
+ if (ops == STREAM_OPS_CAPTURE)
+ dir = "enc_";
+ else
+ dir = "dec_";
+ len = strlen(type) + strlen(dir);
+ strncpy(buf, type, sizeof(buf)-1);
+ strncpy(buf + strlen(type), dir, sizeof(buf)-strlen(type)-1);
+ len += snprintf(buf + len, sizeof(buf) - len, "%d",
+ lib->slot_info.slot_num);
+ len += snprintf(buf + len, sizeof(buf) - len, ".bin");
+
+ pr_debug("Requesting %s\n", buf);
+
+ error = request_firmware(&fw_lib, buf, &sst_drv_ctx->pci->dev);
+ if (error) {
+ pr_err("library load failed %d\n", error);
+ goto wake;
+ }
+ error = sst_validate_library(fw_lib, &lib->slot_info, &entry_point);
+ if (error)
+ goto wake_free;
+
+ lib->mod_entry_pt = entry_point;
+ memcpy(&dload_info.dload_lib, lib, sizeof(*lib));
+ error = sst_download_library(fw_lib, &dload_info);
+ if (error)
+ goto wake_free;
+
+ /* lib is downloaded and init send alloc again */
+ pr_debug("Library is downloaded now...\n");
+wake_free:
+ /* sst_wake_up_alloc_block(sst_drv_ctx, pvt_id, error, NULL); */
+ release_firmware(fw_lib);
+wake:
+ return error;
+}
+
projects / mv-sheeva.git / blobdiff