From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/sound/soc/intel/skylake/skl-sst-dsp.c | 347 +++++++++++++++++++++++++++ 1 file changed, 347 insertions(+) create mode 100644 kernel/sound/soc/intel/skylake/skl-sst-dsp.c (limited to 'kernel/sound/soc/intel/skylake/skl-sst-dsp.c') diff --git a/kernel/sound/soc/intel/skylake/skl-sst-dsp.c b/kernel/sound/soc/intel/skylake/skl-sst-dsp.c new file mode 100644 index 000000000..1bfb7f63b --- /dev/null +++ b/kernel/sound/soc/intel/skylake/skl-sst-dsp.c @@ -0,0 +1,347 @@ +/* + * skl-sst-dsp.c - SKL SST library generic function + * + * Copyright (C) 2014-15, Intel Corporation. + * Author:Rafal Redzimski + * Jeeja KP + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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 + +#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); -- cgit 1.2.3-korg