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* skl-sst-dsp.c - SKL SST library generic function
*
* Copyright (C) 2014-15, Intel Corporation.
* Author:Rafal Redzimski <rafal.f.redzimski@intel.com>
* Jeeja KP <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 version 2, as
* published by the Free Software Foundation.
*
* 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.
*/
#include <sound/pcm.h>
#include "../common/sst-dsp.h"
#include "../common/sst-ipc.h"
#include "../common/sst-dsp-priv.h"
#include "skl-sst-ipc.h"
/* various timeout values */
#define SKL_DSP_PU_TO 50
#define SKL_DSP_PD_TO 50
#define SKL_DSP_RESET_TO 50
void skl_dsp_set_state_locked(struct sst_dsp *ctx, int state)
{
mutex_lock(&ctx->mutex);
ctx->sst_state = state;
mutex_unlock(&ctx->mutex);
}
static int skl_dsp_core_set_reset_state(struct sst_dsp *ctx)
{
int ret;
/* update bits */
sst_dsp_shim_update_bits_unlocked(ctx,
SKL_ADSP_REG_ADSPCS, SKL_ADSPCS_CRST_MASK,
SKL_ADSPCS_CRST(SKL_DSP_CORES_MASK));
/* poll with timeout to check if operation successful */
ret = sst_dsp_register_poll(ctx,
SKL_ADSP_REG_ADSPCS,
SKL_ADSPCS_CRST_MASK,
SKL_ADSPCS_CRST(SKL_DSP_CORES_MASK),
SKL_DSP_RESET_TO,
"Set reset");
if ((sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_ADSPCS) &
SKL_ADSPCS_CRST(SKL_DSP_CORES_MASK)) !=
SKL_ADSPCS_CRST(SKL_DSP_CORES_MASK)) {
dev_err(ctx->dev, "Set reset state failed\n");
ret = -EIO;
}
return ret;
}
static int skl_dsp_core_unset_reset_state(struct sst_dsp *ctx)
{
int ret;
dev_dbg(ctx->dev, "In %s\n", __func__);
/* update bits */
sst_dsp_shim_update_bits_unlocked(ctx, SKL_ADSP_REG_ADSPCS,
SKL_ADSPCS_CRST_MASK, 0);
/* poll with timeout to check if operation successful */
ret = sst_dsp_register_poll(ctx,
SKL_ADSP_REG_ADSPCS,
SKL_ADSPCS_CRST_MASK,
0,
SKL_DSP_RESET_TO,
"Unset reset");
if ((sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_ADSPCS) &
SKL_ADSPCS_CRST(SKL_DSP_CORES_MASK)) != 0) {
dev_err(ctx->dev, "Unset reset state failed\n");
ret = -EIO;
}
return ret;
}
static bool is_skl_dsp_core_enable(struct sst_dsp *ctx)
{
int val;
bool is_enable;
val = sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_ADSPCS);
is_enable = ((val & SKL_ADSPCS_CPA(SKL_DSP_CORES_MASK)) &&
(val & SKL_ADSPCS_SPA(SKL_DSP_CORES_MASK)) &&
!(val & SKL_ADSPCS_CRST(SKL_DSP_CORES_MASK)) &&
!(val & SKL_ADSPCS_CSTALL(SKL_DSP_CORES_MASK)));
dev_dbg(ctx->dev, "DSP core is enabled=%d\n", is_enable);
return is_enable;
}
static int skl_dsp_reset_core(struct sst_dsp *ctx)
{
/* stall core */
sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_ADSPCS,
sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_ADSPCS) &
SKL_ADSPCS_CSTALL(SKL_DSP_CORES_MASK));
/* set reset state */
return skl_dsp_core_set_reset_state(ctx);
}
static int skl_dsp_start_core(struct sst_dsp *ctx)
{
int ret;
/* unset reset state */
ret = skl_dsp_core_unset_reset_state(ctx);
if (ret < 0) {
dev_dbg(ctx->dev, "dsp unset reset fails\n");
return ret;
}
/* run core */
dev_dbg(ctx->dev, "run core...\n");
sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_ADSPCS,
sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_ADSPCS) &
~SKL_ADSPCS_CSTALL(SKL_DSP_CORES_MASK));
if (!is_skl_dsp_core_enable(ctx)) {
skl_dsp_reset_core(ctx);
dev_err(ctx->dev, "DSP core enable failed\n");
ret = -EIO;
}
return ret;
}
static int skl_dsp_core_power_up(struct sst_dsp *ctx)
{
int ret;
/* update bits */
sst_dsp_shim_update_bits_unlocked(ctx, SKL_ADSP_REG_ADSPCS,
SKL_ADSPCS_SPA_MASK, SKL_ADSPCS_SPA(SKL_DSP_CORES_MASK));
/* poll with timeout to check if operation successful */
ret = sst_dsp_register_poll(ctx,
SKL_ADSP_REG_ADSPCS,
SKL_ADSPCS_CPA_MASK,
SKL_ADSPCS_CPA(SKL_DSP_CORES_MASK),
SKL_DSP_PU_TO,
"Power up");
if ((sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_ADSPCS) &
SKL_ADSPCS_CPA(SKL_DSP_CORES_MASK)) !=
SKL_ADSPCS_CPA(SKL_DSP_CORES_MASK)) {
dev_err(ctx->dev, "DSP core power up failed\n");
ret = -EIO;
}
return ret;
}
static int skl_dsp_core_power_down(struct sst_dsp *ctx)
{
/* update bits */
sst_dsp_shim_update_bits_unlocked(ctx, SKL_ADSP_REG_ADSPCS,
SKL_ADSPCS_SPA_MASK, 0);
/* poll with timeout to check if operation successful */
return sst_dsp_register_poll(ctx,
SKL_ADSP_REG_ADSPCS,
SKL_ADSPCS_CPA_MASK,
0,
SKL_DSP_PD_TO,
"Power down");
}
static int skl_dsp_enable_core(struct sst_dsp *ctx)
{
int ret;
/* power up */
ret = skl_dsp_core_power_up(ctx);
if (ret < 0) {
dev_dbg(ctx->dev, "dsp core power up failed\n");
return ret;
}
return skl_dsp_start_core(ctx);
}
int skl_dsp_disable_core(struct sst_dsp *ctx)
{
int ret;
ret = skl_dsp_reset_core(ctx);
if (ret < 0) {
dev_err(ctx->dev, "dsp core reset failed\n");
return ret;
}
/* power down core*/
ret = skl_dsp_core_power_down(ctx);
if (ret < 0) {
dev_err(ctx->dev, "dsp core power down failed\n");
return ret;
}
if (is_skl_dsp_core_enable(ctx)) {
dev_err(ctx->dev, "DSP core disable failed\n");
ret = -EIO;
}
return ret;
}
int skl_dsp_boot(struct sst_dsp *ctx)
{
int ret;
if (is_skl_dsp_core_enable(ctx)) {
dev_dbg(ctx->dev, "dsp core is already enabled, so reset the dap core\n");
ret = skl_dsp_reset_core(ctx);
if (ret < 0) {
dev_err(ctx->dev, "dsp reset failed\n");
return ret;
}
ret = skl_dsp_start_core(ctx);
if (ret < 0) {
dev_err(ctx->dev, "dsp start failed\n");
return ret;
}
} else {
dev_dbg(ctx->dev, "disable and enable to make sure DSP is invalid state\n");
ret = skl_dsp_disable_core(ctx);
if (ret < 0) {
dev_err(ctx->dev, "dsp disable core failes\n");
return ret;
}
ret = skl_dsp_enable_core(ctx);
}
return ret;
}
irqreturn_t skl_dsp_sst_interrupt(int irq, void *dev_id)
{
struct sst_dsp *ctx = dev_id;
u32 val;
irqreturn_t result = IRQ_NONE;
spin_lock(&ctx->spinlock);
val = sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_ADSPIS);
ctx->intr_status = val;
if (val == 0xffffffff) {
spin_unlock(&ctx->spinlock);
return IRQ_NONE;
}
if (val & SKL_ADSPIS_IPC) {
skl_ipc_int_disable(ctx);
result = IRQ_WAKE_THREAD;
}
if (val & SKL_ADSPIS_CL_DMA) {
skl_cldma_int_disable(ctx);
result = IRQ_WAKE_THREAD;
}
spin_unlock(&ctx->spinlock);
return result;
}
int skl_dsp_wake(struct sst_dsp *ctx)
{
return ctx->fw_ops.set_state_D0(ctx);
}
EXPORT_SYMBOL_GPL(skl_dsp_wake);
int skl_dsp_sleep(struct sst_dsp *ctx)
{
return ctx->fw_ops.set_state_D3(ctx);
}
EXPORT_SYMBOL_GPL(skl_dsp_sleep);
struct sst_dsp *skl_dsp_ctx_init(struct device *dev,
struct sst_dsp_device *sst_dev, int irq)
{
int ret;
struct sst_dsp *sst;
sst = devm_kzalloc(dev, sizeof(*sst), GFP_KERNEL);
if (sst == NULL)
return NULL;
spin_lock_init(&sst->spinlock);
mutex_init(&sst->mutex);
sst->dev = dev;
sst->sst_dev = sst_dev;
sst->irq = irq;
sst->ops = sst_dev->ops;
sst->thread_context = sst_dev->thread_context;
/* Initialise SST Audio DSP */
if (sst->ops->init) {
ret = sst->ops->init(sst, NULL);
if (ret < 0)
return NULL;
}
/* Register the ISR */
ret = request_threaded_irq(sst->irq, sst->ops->irq_handler,
sst_dev->thread, IRQF_SHARED, "AudioDSP", sst);
if (ret) {
dev_err(sst->dev, "unable to grab threaded IRQ %d, disabling device\n",
sst->irq);
return NULL;
}
return sst;
}
void skl_dsp_free(struct sst_dsp *dsp)
{
skl_ipc_int_disable(dsp);
free_irq(dsp->irq, dsp);
skl_dsp_disable_core(dsp);
}
EXPORT_SYMBOL_GPL(skl_dsp_free);
bool is_skl_dsp_running(struct sst_dsp *ctx)
{
return (ctx->sst_state == SKL_DSP_RUNNING);
}
EXPORT_SYMBOL_GPL(is_skl_dsp_running);
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