From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vinod Koul Subject: [PATCH v3 1/4] ASoC: Intel: Add helper to poll register for DSP status Date: Thu, 9 Jul 2015 21:38:52 +0530 Message-ID: <1436458135-25537-2-git-send-email-vinod.koul@intel.com> References: <1436458135-25537-1-git-send-email-vinod.koul@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by alsa0.perex.cz (Postfix) with ESMTP id 794312661EE for ; Thu, 9 Jul 2015 18:07:15 +0200 (CEST) In-Reply-To: <1436458135-25537-1-git-send-email-vinod.koul@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org Cc: tiwai@suse.de, liam.r.girdwood@linux.intel.com, patches.audio@intel.com, broonie@kernel.org, "Kp, Jeeja" , Vinod Koul , "Subhransu S. Prusty" List-Id: alsa-devel@alsa-project.org From: "Subhransu S. Prusty" This patch adds helper to poll register for DSP status. Signed-off-by: Subhransu S. Prusty Signed-off-by: Kp, Jeeja Signed-off-by: Vinod Koul --- sound/soc/intel/common/sst-dsp.c | 43 ++++++++++++++++++++++++++++++++++++++++ sound/soc/intel/common/sst-dsp.h | 2 ++ 2 files changed, 45 insertions(+) diff --git a/sound/soc/intel/common/sst-dsp.c b/sound/soc/intel/common/sst-dsp.c index 64e94212d2d2..cc25f4c202af 100644 --- a/sound/soc/intel/common/sst-dsp.c +++ b/sound/soc/intel/common/sst-dsp.c @@ -20,6 +20,7 @@ #include #include #include +#include #include "sst-dsp.h" #include "sst-dsp-priv.h" @@ -222,6 +223,48 @@ int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset, } EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64); +int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask, + u32 target, u32 timeout, char *operation) +{ + int time, ret; + u32 reg; + bool done = false; + + /* + * we will poll for couple of ms using mdelay, if not successful + * then go to longer sleep using usleep_range + */ + + /* check if set state successful */ + for (time = 0; time < 5; time++) { + if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target) { + done = true; + break; + } + mdelay(1); + } + + if (done == false) { + /* sleeping in 10ms steps so adjust timeout value */ + timeout /= 10; + + for (time = 0; time < timeout; time++) { + if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target) + break; + + usleep_range(5000, 10000); + } + } + + reg = sst_dsp_shim_read_unlocked(ctx, offset); + dev_info(ctx->dev, "FW Poll Status: reg=%#x %s %s\n", reg, operation, + (time < timeout) ? "successful" : "timedout"); + ret = time < timeout ? 0 : -ETIME; + + return ret; +} +EXPORT_SYMBOL_GPL(sst_dsp_register_poll); + void sst_dsp_dump(struct sst_dsp *sst) { if (sst->ops->dump) diff --git a/sound/soc/intel/common/sst-dsp.h b/sound/soc/intel/common/sst-dsp.h index 96aeb2556ad4..cc3197be4cf7 100644 --- a/sound/soc/intel/common/sst-dsp.h +++ b/sound/soc/intel/common/sst-dsp.h @@ -278,6 +278,8 @@ void sst_dsp_inbox_read(struct sst_dsp *dsp, void *message, size_t bytes); void sst_dsp_outbox_write(struct sst_dsp *dsp, void *message, size_t bytes); void sst_dsp_outbox_read(struct sst_dsp *dsp, void *message, size_t bytes); void sst_dsp_mailbox_dump(struct sst_dsp *dsp, size_t bytes); +int sst_dsp_register_poll(struct sst_dsp *dsp, u32 offset, u32 mask, + u32 expected_value, u32 timeout, char *operation); /* Debug */ void sst_dsp_dump(struct sst_dsp *sst); -- 1.9.1