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From:   Cheng-Yi Chiang <cychiang@chromium.org>
To:     linux-kernel@vger.kernel.org
Cc:     Lee Jones <lee.jones@linaro.org>, Mark Brown <broonie@kernel.org>,
        alsa-devel@alsa-project.org, dgreid@chromium.org,
        tzungbi@chromium.org, Rohit kumar <rohitkr@codeaurora.org>,
        Cheng-Yi Chiang <cychiang@chromium.org>
Subject: [PATCH v2] mfd: cros_ec: Add commands to control codec
Date:   Thu,  6 Dec 2018 12:05:40 +0800
Message-Id: <20181206040540.84632-1-cychiang@chromium.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add EC host commands to control codec on EC.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
---
 V2 fixed the wrong ancestor issue so the patch can be applied cleanly on mfd tree.
 Codec driver that uses these commands will be sent separately.
 Thanks!

 include/linux/mfd/cros_ec_commands.h | 94 ++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)

diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
index 9a9631f0559e2..fc91082d4c357 100644
--- a/include/linux/mfd/cros_ec_commands.h
+++ b/include/linux/mfd/cros_ec_commands.h
@@ -2790,6 +2790,100 @@ struct ec_response_battery_vendor_param {
 	uint32_t value;
 } __packed;
 
+/*****************************************************************************/
+/* Commands for I2S recording on audio codec. */
+
+#define EC_CMD_CODEC_I2S 0x00BC
+
+enum ec_codec_i2s_subcmd {
+	EC_CODEC_SET_SAMPLE_DEPTH = 0x0,
+	EC_CODEC_SET_GAIN = 0x1,
+	EC_CODEC_GET_GAIN = 0x2,
+	EC_CODEC_I2S_ENABLE = 0x3,
+	EC_CODEC_I2S_SET_CONFIG = 0x4,
+	EC_CODEC_I2S_SET_TDM_CONFIG = 0x5,
+	EC_CODEC_I2S_SET_BCLK = 0x6,
+};
+
+enum ec_sample_depth_value {
+	EC_CODEC_SAMPLE_DEPTH_16 = 0,
+	EC_CODEC_SAMPLE_DEPTH_24 = 1,
+};
+
+enum ec_i2s_config {
+	EC_DAI_FMT_I2S = 0,
+	EC_DAI_FMT_RIGHT_J = 1,
+	EC_DAI_FMT_LEFT_J = 2,
+	EC_DAI_FMT_PCM_A = 3,
+	EC_DAI_FMT_PCM_B = 4,
+	EC_DAI_FMT_PCM_TDM = 5,
+};
+
+struct ec_param_codec_i2s {
+	/*
+	 * enum ec_codec_i2s_subcmd
+	 */
+	uint8_t cmd;
+	union {
+		/*
+		 * EC_CODEC_SET_SAMPLE_DEPTH
+		 * Value should be one of ec_sample_depth_value.
+		 */
+		uint8_t depth;
+
+		/*
+		 * EC_CODEC_SET_GAIN
+		 * Value should be 0~43 for both channels.
+		 */
+		struct ec_param_codec_i2s_set_gain {
+			uint8_t left;
+			uint8_t right;
+		} __packed gain;
+
+		/*
+		 * EC_CODEC_I2S_ENABLE
+		 * 1 to enable, 0 to disable.
+		 */
+		uint8_t i2s_enable;
+
+		/*
+		 * EC_CODEC_I2S_SET_COFNIG
+		 * Value should be one of ec_i2s_config.
+		 */
+		uint8_t i2s_config;
+
+		/*
+		 * EC_CODEC_I2S_SET_TDM_CONFIG
+		 * Value should be one of ec_i2s_config.
+		 */
+		struct ec_param_codec_i2s_tdm {
+			/*
+			 * 0 to 496
+			 */
+			int16_t ch0_delay;
+			/*
+			 * -1 to 496
+			 */
+			int16_t ch1_delay;
+			uint8_t adjacent_to_ch0;
+			uint8_t adjacent_to_ch1;
+		} __packed tdm_param;
+
+		/*
+		 * EC_CODEC_I2S_SET_BCLK
+		 */
+		uint32_t bclk;
+	};
+} __packed;
+
+/*
+ * For subcommand EC_CODEC_GET_GAIN.
+ */
+struct ec_response_codec_gain {
+	uint8_t left;
+	uint8_t right;
+} __packed;
+
 /*****************************************************************************/
 /* System commands */
 
-- 
2.20.0.rc1.387.gf8505762e3-goog