123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347 |
- /*
- * 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);
|