964c6975e8
This adds runtime PM support for audio driver. This also fixes LPA audio mode for moorestown platform Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
491 lines
14 KiB
C
491 lines
14 KiB
C
/*
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* intel_sst_dsp.c - Intel SST Driver for audio engine
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*
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* Copyright (C) 2008-10 Intel Corp
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* Authors: Vinod Koul <vinod.koul@intel.com>
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* Harsha Priya <priya.harsha@intel.com>
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* Dharageswari R <dharageswari.r@intel.com>
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* KP Jeeja <jeeja.kp@intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This driver exposes the audio engine functionalities to the ALSA
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* and middleware.
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*
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* This file contains all dsp controlling functions like firmware download,
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* setting/resetting dsp cores, etc
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/pci.h>
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#include <linux/fs.h>
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#include <linux/firmware.h>
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#include "intel_sst.h"
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#include "intel_sst_ioctl.h"
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#include "intel_sst_fw_ipc.h"
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#include "intel_sst_common.h"
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/**
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* intel_sst_reset_dsp_mrst - Resetting SST DSP
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*
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* This resets DSP in case of MRST platfroms
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*/
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static int intel_sst_reset_dsp_mrst(void)
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{
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union config_status_reg csr;
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pr_debug("Resetting the DSP in mrst\n");
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csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
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csr.full |= 0x382;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
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csr.part.strb_cntr_rst = 0;
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csr.part.run_stall = 0x1;
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csr.part.bypass = 0x7;
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csr.part.sst_reset = 0x1;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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return 0;
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}
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/**
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* intel_sst_reset_dsp_medfield - Resetting SST DSP
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*
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* This resets DSP in case of Medfield platfroms
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*/
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static int intel_sst_reset_dsp_medfield(void)
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{
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union config_status_reg csr;
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pr_debug("Resetting the DSP in medfield\n");
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csr.full = 0x048303E2;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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return 0;
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}
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/**
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* sst_start_mrst - Start the SST DSP processor
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*
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* This starts the DSP in MRST platfroms
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*/
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static int sst_start_mrst(void)
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{
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union config_status_reg csr;
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csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
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csr.part.bypass = 0;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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csr.part.run_stall = 0;
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csr.part.sst_reset = 0;
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csr.part.strb_cntr_rst = 1;
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pr_debug("Setting SST to execute_mrst 0x%x\n", csr.full);
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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return 0;
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}
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/**
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* sst_start_medfield - Start the SST DSP processor
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*
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* This starts the DSP in MRST platfroms
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*/
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static int sst_start_medfield(void)
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{
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union config_status_reg csr;
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csr.full = 0x04830062;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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csr.full = 0x04830063;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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csr.full = 0x04830061;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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pr_debug("Starting the DSP_medfld\n");
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return 0;
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}
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/**
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* sst_parse_module - Parse audio FW modules
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*
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* @module: FW module header
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*
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* Parses modules that need to be placed in SST IRAM and DRAM
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* returns error or 0 if module sizes are proper
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*/
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static int sst_parse_module(struct fw_module_header *module)
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{
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struct dma_block_info *block;
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u32 count;
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void __iomem *ram;
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pr_debug("module sign %s size %x blocks %x type %x\n",
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module->signature, module->mod_size,
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module->blocks, module->type);
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pr_debug("module entrypoint 0x%x\n", module->entry_point);
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block = (void *)module + sizeof(*module);
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for (count = 0; count < module->blocks; count++) {
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if (block->size <= 0) {
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pr_err("block size invalid\n");
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return -EINVAL;
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}
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switch (block->type) {
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case SST_IRAM:
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ram = sst_drv_ctx->iram;
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break;
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case SST_DRAM:
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ram = sst_drv_ctx->dram;
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break;
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default:
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pr_err("wrong ram type0x%x in block0x%x\n",
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block->type, count);
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return -EINVAL;
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}
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memcpy_toio(ram + block->ram_offset,
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(void *)block + sizeof(*block), block->size);
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block = (void *)block + sizeof(*block) + block->size;
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}
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return 0;
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}
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/**
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* sst_parse_fw_image - parse and load FW
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*
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* @sst_fw: pointer to audio fw
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*
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* This function is called to parse and download the FW image
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*/
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static int sst_parse_fw_image(const struct firmware *sst_fw)
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{
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struct fw_header *header;
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u32 count;
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int ret_val;
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struct fw_module_header *module;
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BUG_ON(!sst_fw);
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/* Read the header information from the data pointer */
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header = (struct fw_header *)sst_fw->data;
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/* verify FW */
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if ((strncmp(header->signature, SST_FW_SIGN, 4) != 0) ||
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(sst_fw->size != header->file_size + sizeof(*header))) {
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/* Invalid FW signature */
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pr_err("Invalid FW sign/filesize mismatch\n");
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return -EINVAL;
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}
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pr_debug("header sign=%s size=%x modules=%x fmt=%x size=%x\n",
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header->signature, header->file_size, header->modules,
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header->file_format, sizeof(*header));
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module = (void *)sst_fw->data + sizeof(*header);
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for (count = 0; count < header->modules; count++) {
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/* module */
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ret_val = sst_parse_module(module);
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if (ret_val)
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return ret_val;
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module = (void *)module + sizeof(*module) + module->mod_size ;
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}
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return 0;
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}
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/**
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* sst_load_fw - function to load FW into DSP
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*
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* @fw: Pointer to driver loaded FW
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* @context: driver context
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*
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* This function is called by OS when the FW is loaded into kernel
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*/
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int sst_load_fw(const struct firmware *fw, void *context)
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{
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int ret_val;
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pr_debug("load_fw called\n");
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BUG_ON(!fw);
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if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
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ret_val = intel_sst_reset_dsp_mrst();
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else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
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ret_val = intel_sst_reset_dsp_medfield();
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if (ret_val)
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return ret_val;
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ret_val = sst_parse_fw_image(fw);
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if (ret_val)
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return ret_val;
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mutex_lock(&sst_drv_ctx->sst_lock);
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sst_drv_ctx->sst_state = SST_FW_LOADED;
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mutex_unlock(&sst_drv_ctx->sst_lock);
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/* 7. ask scu to reset the bypass bits */
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/* 8.bring sst out of reset */
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if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
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ret_val = sst_start_mrst();
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else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
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ret_val = sst_start_medfield();
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if (ret_val)
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return ret_val;
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pr_debug("fw loaded successful!!!\n");
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return ret_val;
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}
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/*This function is called when any codec/post processing library
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needs to be downloaded*/
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static int sst_download_library(const struct firmware *fw_lib,
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struct snd_sst_lib_download_info *lib)
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{
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/* send IPC message and wait */
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int i;
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u8 pvt_id;
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struct ipc_post *msg = NULL;
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union config_status_reg csr;
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struct snd_sst_str_type str_type = {0};
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int retval = 0;
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if (sst_create_large_msg(&msg))
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return -ENOMEM;
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pvt_id = sst_assign_pvt_id(sst_drv_ctx);
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i = sst_get_block_stream(sst_drv_ctx);
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pr_debug("alloc block allocated = %d, pvt_id %d\n", i, pvt_id);
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if (i < 0) {
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kfree(msg);
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return -ENOMEM;
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}
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sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
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sst_fill_header(&msg->header, IPC_IA_PREP_LIB_DNLD, 1, pvt_id);
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msg->header.part.data = sizeof(u32) + sizeof(str_type);
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str_type.codec_type = lib->dload_lib.lib_info.lib_type;
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/*str_type.pvt_id = pvt_id;*/
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memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
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memcpy(msg->mailbox_data + sizeof(u32), &str_type, sizeof(str_type));
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spin_lock(&sst_drv_ctx->list_spin_lock);
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list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
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spin_unlock(&sst_drv_ctx->list_spin_lock);
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sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
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retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
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if (retval) {
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/* error */
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sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
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pr_err("Prep codec downloaded failed %d\n",
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retval);
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return -EIO;
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}
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pr_debug("FW responded, ready for download now...\n");
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/* downloading on success */
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mutex_lock(&sst_drv_ctx->sst_lock);
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sst_drv_ctx->sst_state = SST_FW_LOADED;
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mutex_unlock(&sst_drv_ctx->sst_lock);
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csr.full = readl(sst_drv_ctx->shim + SST_CSR);
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csr.part.run_stall = 1;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
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csr.part.bypass = 0x7;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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sst_parse_fw_image(fw_lib);
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/* set the FW to running again */
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csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
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csr.part.bypass = 0x0;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
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csr.part.run_stall = 0;
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sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
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/* send download complete and wait */
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if (sst_create_large_msg(&msg)) {
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sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
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return -ENOMEM;
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}
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sst_fill_header(&msg->header, IPC_IA_LIB_DNLD_CMPLT, 1, pvt_id);
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sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
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msg->header.part.data = sizeof(u32) + sizeof(*lib);
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lib->pvt_id = pvt_id;
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memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
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memcpy(msg->mailbox_data + sizeof(u32), lib, sizeof(*lib));
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spin_lock(&sst_drv_ctx->list_spin_lock);
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list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
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spin_unlock(&sst_drv_ctx->list_spin_lock);
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sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
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pr_debug("Waiting for FW response Download complete\n");
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sst_drv_ctx->alloc_block[i].ops_block.condition = false;
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retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
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if (retval) {
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/* error */
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mutex_lock(&sst_drv_ctx->sst_lock);
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sst_drv_ctx->sst_state = SST_UN_INIT;
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mutex_unlock(&sst_drv_ctx->sst_lock);
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sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
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return -EIO;
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}
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pr_debug("FW success on Download complete\n");
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sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
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mutex_lock(&sst_drv_ctx->sst_lock);
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sst_drv_ctx->sst_state = SST_FW_RUNNING;
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mutex_unlock(&sst_drv_ctx->sst_lock);
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return 0;
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}
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/* This function is called befoer downloading the codec/postprocessing
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library is set for download to SST DSP*/
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static int sst_validate_library(const struct firmware *fw_lib,
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struct lib_slot_info *slot,
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u32 *entry_point)
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{
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struct fw_header *header;
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struct fw_module_header *module;
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struct dma_block_info *block;
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unsigned int n_blk, isize = 0, dsize = 0;
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int err = 0;
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header = (struct fw_header *)fw_lib->data;
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if (header->modules != 1) {
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pr_err("Module no mismatch found\n");
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err = -EINVAL;
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goto exit;
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}
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module = (void *)fw_lib->data + sizeof(*header);
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*entry_point = module->entry_point;
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pr_debug("Module entry point 0x%x\n", *entry_point);
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pr_debug("Module Sign %s, Size 0x%x, Blocks 0x%x Type 0x%x\n",
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module->signature, module->mod_size,
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module->blocks, module->type);
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block = (void *)module + sizeof(*module);
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for (n_blk = 0; n_blk < module->blocks; n_blk++) {
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switch (block->type) {
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case SST_IRAM:
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isize += block->size;
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break;
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case SST_DRAM:
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dsize += block->size;
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break;
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default:
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pr_err("Invalid block type for 0x%x\n", n_blk);
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err = -EINVAL;
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goto exit;
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}
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block = (void *)block + sizeof(*block) + block->size;
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}
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if (isize > slot->iram_size || dsize > slot->dram_size) {
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pr_err("library exceeds size allocated\n");
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err = -EINVAL;
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goto exit;
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} else
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pr_debug("Library is safe for download...\n");
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pr_debug("iram 0x%x, dram 0x%x, iram 0x%x, dram 0x%x\n",
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isize, dsize, slot->iram_size, slot->dram_size);
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exit:
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return err;
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}
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/* This function is called when FW requests for a particular libary download
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This function prepares the library to download*/
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int sst_load_library(struct snd_sst_lib_download *lib, u8 ops)
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{
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char buf[20];
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const char *type, *dir;
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int len = 0, error = 0;
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u32 entry_point;
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const struct firmware *fw_lib;
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struct snd_sst_lib_download_info dload_info = {{{0},},};
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memset(buf, 0, sizeof(buf));
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pr_debug("Lib Type 0x%x, Slot 0x%x, ops 0x%x\n",
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lib->lib_info.lib_type, lib->slot_info.slot_num, ops);
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pr_debug("Version 0x%x, name %s, caps 0x%x media type 0x%x\n",
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lib->lib_info.lib_version, lib->lib_info.lib_name,
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lib->lib_info.lib_caps, lib->lib_info.media_type);
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pr_debug("IRAM Size 0x%x, offset 0x%x\n",
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lib->slot_info.iram_size, lib->slot_info.iram_offset);
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pr_debug("DRAM Size 0x%x, offset 0x%x\n",
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lib->slot_info.dram_size, lib->slot_info.dram_offset);
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switch (lib->lib_info.lib_type) {
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case SST_CODEC_TYPE_MP3:
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type = "mp3_";
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break;
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case SST_CODEC_TYPE_AAC:
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type = "aac_";
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break;
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case SST_CODEC_TYPE_AACP:
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type = "aac_v1_";
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break;
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case SST_CODEC_TYPE_eAACP:
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type = "aac_v2_";
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break;
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case SST_CODEC_TYPE_WMA9:
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type = "wma9_";
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break;
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default:
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pr_err("Invalid codec type\n");
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error = -EINVAL;
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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;
|
|
}
|
|
|