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* 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 = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
csr.full |= 0x382;
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 Medfield platfroms
*/
static int sst_start_medfield(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.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
csr.part.mfld_strb = 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.run_stall = 0;
csr.part.sst_reset = 0;
pr_debug("Starting the DSP_medfld %x\n", csr.full);
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 before 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 library 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;
}
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