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Diffstat (limited to 'sound/soc/intel/sst/sst.c')
-rw-r--r--sound/soc/intel/sst/sst.c128
1 files changed, 120 insertions, 8 deletions
diff --git a/sound/soc/intel/sst/sst.c b/sound/soc/intel/sst/sst.c
index 11c578651c1c..1a7eeec444b1 100644
--- a/sound/soc/intel/sst/sst.c
+++ b/sound/soc/intel/sst/sst.c
@@ -423,23 +423,135 @@ static int intel_sst_runtime_suspend(struct device *dev)
return ret;
}
-static int intel_sst_runtime_resume(struct device *dev)
+static int intel_sst_suspend(struct device *dev)
{
- int ret = 0;
struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+ struct sst_fw_save *fw_save;
+ int i, ret = 0;
- if (ctx->sst_state == SST_RESET) {
- ret = sst_load_fw(ctx);
- if (ret) {
- dev_err(dev, "FW download fail %d\n", ret);
- sst_set_fw_state_locked(ctx, SST_RESET);
+ /* check first if we are already in SW reset */
+ if (ctx->sst_state == SST_RESET)
+ return 0;
+
+ /*
+ * check if any stream is active and running
+ * they should already by suspend by soc_suspend
+ */
+ for (i = 1; i <= ctx->info.max_streams; i++) {
+ struct stream_info *stream = &ctx->streams[i];
+
+ if (stream->status == STREAM_RUNNING) {
+ dev_err(dev, "stream %d is running, cant susupend, abort\n", i);
+ return -EBUSY;
}
}
+ synchronize_irq(ctx->irq_num);
+ flush_workqueue(ctx->post_msg_wq);
+
+ /* Move the SST state to Reset */
+ sst_set_fw_state_locked(ctx, SST_RESET);
+
+ /* tell DSP we are suspending */
+ if (ctx->ops->save_dsp_context(ctx))
+ return -EBUSY;
+
+ /* save the memories */
+ fw_save = kzalloc(sizeof(*fw_save), GFP_KERNEL);
+ if (!fw_save)
+ return -ENOMEM;
+ fw_save->iram = kzalloc(ctx->iram_end - ctx->iram_base, GFP_KERNEL);
+ if (!fw_save->iram) {
+ ret = -ENOMEM;
+ goto iram;
+ }
+ fw_save->dram = kzalloc(ctx->dram_end - ctx->dram_base, GFP_KERNEL);
+ if (!fw_save->dram) {
+ ret = -ENOMEM;
+ goto dram;
+ }
+ fw_save->sram = kzalloc(SST_MAILBOX_SIZE, GFP_KERNEL);
+ if (!fw_save->sram) {
+ ret = -ENOMEM;
+ goto sram;
+ }
+
+ fw_save->ddr = kzalloc(ctx->ddr_end - ctx->ddr_base, GFP_KERNEL);
+ if (!fw_save->ddr) {
+ ret = -ENOMEM;
+ goto ddr;
+ }
+
+ memcpy32_fromio(fw_save->iram, ctx->iram, ctx->iram_end - ctx->iram_base);
+ memcpy32_fromio(fw_save->dram, ctx->dram, ctx->dram_end - ctx->dram_base);
+ memcpy32_fromio(fw_save->sram, ctx->mailbox, SST_MAILBOX_SIZE);
+ memcpy32_fromio(fw_save->ddr, ctx->ddr, ctx->ddr_end - ctx->ddr_base);
+
+ ctx->fw_save = fw_save;
+ ctx->ops->reset(ctx);
+ return 0;
+ddr:
+ kfree(fw_save->sram);
+sram:
+ kfree(fw_save->dram);
+dram:
+ kfree(fw_save->iram);
+iram:
+ kfree(fw_save);
+ return ret;
+}
+
+static int intel_sst_resume(struct device *dev)
+{
+ struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+ struct sst_fw_save *fw_save = ctx->fw_save;
+ int ret = 0;
+ struct sst_block *block;
+
+ if (!fw_save)
+ return 0;
+
+ sst_set_fw_state_locked(ctx, SST_FW_LOADING);
+
+ /* we have to restore the memory saved */
+ ctx->ops->reset(ctx);
+
+ ctx->fw_save = NULL;
+
+ memcpy32_toio(ctx->iram, fw_save->iram, ctx->iram_end - ctx->iram_base);
+ memcpy32_toio(ctx->dram, fw_save->dram, ctx->dram_end - ctx->dram_base);
+ memcpy32_toio(ctx->mailbox, fw_save->sram, SST_MAILBOX_SIZE);
+ memcpy32_toio(ctx->ddr, fw_save->ddr, ctx->ddr_end - ctx->ddr_base);
+
+ kfree(fw_save->sram);
+ kfree(fw_save->dram);
+ kfree(fw_save->iram);
+ kfree(fw_save->ddr);
+ kfree(fw_save);
+
+ block = sst_create_block(ctx, 0, FW_DWNL_ID);
+ if (block == NULL)
+ return -ENOMEM;
+
+
+ /* start and wait for ack */
+ ctx->ops->start(ctx);
+ ret = sst_wait_timeout(ctx, block);
+ if (ret) {
+ dev_err(ctx->dev, "fw download failed %d\n", ret);
+ /* FW download failed due to timeout */
+ ret = -EBUSY;
+
+ } else {
+ sst_set_fw_state_locked(ctx, SST_FW_RUNNING);
+ }
+
+ sst_free_block(ctx, block);
return ret;
}
const struct dev_pm_ops intel_sst_pm = {
+ .suspend = intel_sst_suspend,
+ .resume = intel_sst_resume,
.runtime_suspend = intel_sst_runtime_suspend,
- .runtime_resume = intel_sst_runtime_resume,
};
EXPORT_SYMBOL_GPL(intel_sst_pm);