[media] media: i2c: max2175: Add MAX2175 support

This patch adds driver support for the MAX2175 chip. This is Maxim
Integrated's RF to Bits tuner front end chip designed for software-defined
radio solutions. This driver exposes the tuner as a sub-device instance
with standard and custom controls to configure the device.

Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/drivers/media/i2c/max2175.h b/drivers/media/i2c/max2175.h
new file mode 100644
index 000000000000..eb43373ce7e2
--- /dev/null
+++ b/drivers/media/i2c/max2175.h
@@ -0,0 +1,109 @@
+/*
+ * Maxim Integrated MAX2175 RF to Bits tuner driver
+ *
+ * This driver & most of the hard coded values are based on the reference
+ * application delivered by Maxim for this device.
+ *
+ * Copyright (C) 2016 Maxim Integrated Products
+ * Copyright (C) 2017 Renesas Electronics Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 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 __MAX2175_H__
+#define __MAX2175_H__
+
+#define MAX2175_EU_XTAL_FREQ	36864000	/* In Hz */
+#define MAX2175_NA_XTAL_FREQ	40186125	/* In Hz */
+
+enum max2175_region {
+	MAX2175_REGION_EU = 0,	/* Europe */
+	MAX2175_REGION_NA,	/* North America */
+};
+
+enum max2175_band {
+	MAX2175_BAND_AM = 0,
+	MAX2175_BAND_FM,
+	MAX2175_BAND_VHF,
+	MAX2175_BAND_L,
+};
+
+enum max2175_eu_mode {
+	/* EU modes */
+	MAX2175_EU_FM_1_2 = 0,
+	MAX2175_DAB_1_2,
+
+	/*
+	 * Other possible modes to add in future
+	 * MAX2175_DAB_1_0,
+	 * MAX2175_DAB_1_3,
+	 * MAX2175_EU_FM_2_2,
+	 * MAX2175_EU_FMHD_4_0,
+	 * MAX2175_EU_AM_1_0,
+	 * MAX2175_EU_AM_2_2,
+	 */
+};
+
+enum max2175_na_mode {
+	/* NA modes */
+	MAX2175_NA_FM_1_0 = 0,
+	MAX2175_NA_FM_2_0,
+
+	/*
+	 * Other possible modes to add in future
+	 * MAX2175_NA_FMHD_1_0,
+	 * MAX2175_NA_FMHD_1_2,
+	 * MAX2175_NA_AM_1_0,
+	 * MAX2175_NA_AM_1_2,
+	 */
+};
+
+/* Supported I2S modes */
+enum {
+	MAX2175_I2S_MODE0 = 0,
+	MAX2175_I2S_MODE1,
+	MAX2175_I2S_MODE2,
+	MAX2175_I2S_MODE3,
+	MAX2175_I2S_MODE4,
+};
+
+/* Coefficient table groups */
+enum {
+	MAX2175_CH_MSEL = 0,
+	MAX2175_EQ_MSEL,
+	MAX2175_AA_MSEL,
+};
+
+/* HSLS LO injection polarity */
+enum {
+	MAX2175_LO_BELOW_DESIRED = 0,
+	MAX2175_LO_ABOVE_DESIRED,
+};
+
+/* Channel FSM modes */
+enum max2175_csm_mode {
+	MAX2175_LOAD_TO_BUFFER = 0,
+	MAX2175_PRESET_TUNE,
+	MAX2175_SEARCH,
+	MAX2175_AF_UPDATE,
+	MAX2175_JUMP_FAST_TUNE,
+	MAX2175_CHECK,
+	MAX2175_LOAD_AND_SWAP,
+	MAX2175_END,
+	MAX2175_BUFFER_PLUS_PRESET_TUNE,
+	MAX2175_BUFFER_PLUS_SEARCH,
+	MAX2175_BUFFER_PLUS_AF_UPDATE,
+	MAX2175_BUFFER_PLUS_JUMP_FAST_TUNE,
+	MAX2175_BUFFER_PLUS_CHECK,
+	MAX2175_BUFFER_PLUS_LOAD_AND_SWAP,
+	MAX2175_NO_ACTION
+};
+
+#endif /* __MAX2175_H__ */