ASoC: wcd9xxx: use hwdep node for codec calibration
Currently codec driver uses request_firmware to get
calibration data but as this firmware file is also written by
userspace process after bootup, it is not recommended to
use request_firmware. ALSA core provides mechanism to get
hardware dependant data using hwdep nodes. Tomtom codec will
use aforementioned nodes to get calibration data from userspace.
Changed ANC calibration data size
Change-Id: Iace6e239029c7b0d93a5d61a0025ee551acf952f
Signed-off-by: Anish Kumar <kanish@codeaurora.org>
Signed-off-by: Pavan Chikkala <pavanc@codeaurora.org>
diff --git a/include/sound/msmcal-hwdep.h b/include/sound/msmcal-hwdep.h
new file mode 100644
index 0000000..324b497
--- /dev/null
+++ b/include/sound/msmcal-hwdep.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ */
+#ifndef _CALIB_HWDEP_H
+#define _CALIB_HWDEP_H
+
+#define WCD9XXX_CODEC_HWDEP_NODE 1000
+enum wcd_cal_type {
+ WCD9XXX_MIN_CAL,
+ WCD9XXX_ANC_CAL = WCD9XXX_MIN_CAL,
+ WCD9XXX_MAD_CAL,
+ WCD9XXX_MBHC_CAL,
+ WCD9XXX_MAX_CAL,
+};
+
+struct wcdcal_ioctl_buffer {
+ __u32 size;
+ __u8 __user *buffer;
+ enum wcd_cal_type cal_type;
+};
+
+#define SNDRV_CTL_IOCTL_HWDEP_CAL_TYPE \
+ _IOW('U', 0x1, struct wcdcal_ioctl_buffer)
+
+#endif /*_CALIB_HWDEP_H*/