mfd: si476x: Add header files and Kbuild plumbing

This patch adds all necessary header files and Kbuild plumbing for the
core driver for Silicon Laboratories Si476x series of AM/FM tuner
chips.

The driver as a whole is implemented as an MFD device and this patch
adds a core portion of it that provides all the necessary
functionality to the two other drivers that represent radio and audio
codec subsystems of the chip.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 163 insertions, 0 deletions

diff --git a/include/linux/mfd/si476x-reports.h b/include/linux/mfd/si476x-reports.h
new file mode 100644
index 000000000000..e0b9455a79c0
--- /dev/null
+++ b/include/linux/mfd/si476x-reports.h
@@ -0,0 +1,163 @@
+/*
+ * include/media/si476x-platform.h -- Definitions of the data formats
+ * returned by debugfs hooks
+ *
+ * Copyright (C) 2013 Andrey Smirnov
+ *
+ * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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 __SI476X_REPORTS_H__
+#define __SI476X_REPORTS_H__
+
+/**
+ * struct si476x_rsq_status - structure containing received signal
+ * quality
+ * @multhint:   Multipath Detect High.
+ *              true  - Indicatedes that the value is below
+ *                      FM_RSQ_MULTIPATH_HIGH_THRESHOLD
+ *              false - Indicatedes that the value is above
+ *                      FM_RSQ_MULTIPATH_HIGH_THRESHOLD
+ * @multlint:   Multipath Detect Low.
+ *              true  - Indicatedes that the value is below
+ *                      FM_RSQ_MULTIPATH_LOW_THRESHOLD
+ *              false - Indicatedes that the value is above
+ *                      FM_RSQ_MULTIPATH_LOW_THRESHOLD
+ * @snrhint:    SNR Detect High.
+ *              true  - Indicatedes that the value is below
+ *                      FM_RSQ_SNR_HIGH_THRESHOLD
+ *              false - Indicatedes that the value is above
+ *                      FM_RSQ_SNR_HIGH_THRESHOLD
+ * @snrlint:    SNR Detect Low.
+ *              true  - Indicatedes that the value is below
+ *                      FM_RSQ_SNR_LOW_THRESHOLD
+ *              false - Indicatedes that the value is above
+ *                      FM_RSQ_SNR_LOW_THRESHOLD
+ * @rssihint:   RSSI Detect High.
+ *              true  - Indicatedes that the value is below
+ *                      FM_RSQ_RSSI_HIGH_THRESHOLD
+ *              false - Indicatedes that the value is above
+ *                      FM_RSQ_RSSI_HIGH_THRESHOLD
+ * @rssilint:   RSSI Detect Low.
+ *              true  - Indicatedes that the value is below
+ *                      FM_RSQ_RSSI_LOW_THRESHOLD
+ *              false - Indicatedes that the value is above
+ *                      FM_RSQ_RSSI_LOW_THRESHOLD
+ * @bltf:       Band Limit.
+ *              Set if seek command hits the band limit or wrapped to
+ *              the original frequency.
+ * @snr_ready:  SNR measurement in progress.
+ * @rssiready:  RSSI measurement in progress.
+ * @afcrl:      Set if FREQOFF >= MAX_TUNE_ERROR
+ * @valid:      Set if the channel is valid
+ *               rssi < FM_VALID_RSSI_THRESHOLD
+ *               snr  < FM_VALID_SNR_THRESHOLD
+ *               tune_error < FM_VALID_MAX_TUNE_ERROR
+ * @readfreq:   Current tuned frequency.
+ * @freqoff:    Signed frequency offset.
+ * @rssi:       Received Signal Strength Indicator(dBuV).
+ * @snr:        RF SNR Indicator(dB).
+ * @lassi:
+ * @hassi:      Low/High side Adjacent(100 kHz) Channel Strength Indicator
+ * @mult:       Multipath indicator
+ * @dev:        Who knows? But values may vary.
+ * @readantcap: Antenna tuning capacity value.
+ * @assi:       Adjacent Channel(+/- 200kHz) Strength Indicator
+ * @usn:        Ultrasonic Noise Inticator in -DBFS
+ */
+struct si476x_rsq_status_report {
+	__u8 multhint, multlint;
+	__u8 snrhint,  snrlint;
+	__u8 rssihint, rssilint;
+	__u8 bltf;
+	__u8 snr_ready;
+	__u8 rssiready;
+	__u8 injside;
+	__u8 afcrl;
+	__u8 valid;
+
+	__u16 readfreq;
+	__s8  freqoff;
+	__s8  rssi;
+	__s8  snr;
+	__s8  issi;
+	__s8  lassi, hassi;
+	__s8  mult;
+	__u8  dev;
+	__u16 readantcap;
+	__s8  assi;
+	__s8  usn;
+
+	__u8 pilotdev;
+	__u8 rdsdev;
+	__u8 assidev;
+	__u8 strongdev;
+	__u16 rdspi;
+} __packed;
+
+/**
+ * si476x_acf_status_report - ACF report results
+ *
+ * @blend_int: If set, indicates that stereo separation has crossed
+ * below the blend threshold as set by FM_ACF_BLEND_THRESHOLD
+ * @hblend_int: If set, indicates that HiBlend cutoff frequency is
+ * lower than threshold as set by FM_ACF_HBLEND_THRESHOLD
+ * @hicut_int:  If set, indicates that HiCut cutoff frequency is lower
+ * than the threshold set by ACF_
+
+ */
+struct si476x_acf_status_report {
+	__u8 blend_int;
+	__u8 hblend_int;
+	__u8 hicut_int;
+	__u8 chbw_int;
+	__u8 softmute_int;
+	__u8 smute;
+	__u8 smattn;
+	__u8 chbw;
+	__u8 hicut;
+	__u8 hiblend;
+	__u8 pilot;
+	__u8 stblend;
+} __packed;
+
+enum si476x_fmagc {
+	SI476X_FMAGC_10K_OHM	= 0,
+	SI476X_FMAGC_800_OHM	= 1,
+	SI476X_FMAGC_400_OHM	= 2,
+	SI476X_FMAGC_200_OHM	= 4,
+	SI476X_FMAGC_100_OHM	= 8,
+	SI476X_FMAGC_50_OHM	= 16,
+	SI476X_FMAGC_25_OHM	= 32,
+	SI476X_FMAGC_12P5_OHM	= 64,
+	SI476X_FMAGC_6P25_OHM	= 128,
+};
+
+struct si476x_agc_status_report {
+	__u8 mxhi;
+	__u8 mxlo;
+	__u8 lnahi;
+	__u8 lnalo;
+	__u8 fmagc1;
+	__u8 fmagc2;
+	__u8 pgagain;
+	__u8 fmwblang;
+} __packed;
+
+struct si476x_rds_blockcount_report {
+	__u16 expected;
+	__u16 received;
+	__u16 uncorrectable;
+} __packed;
+
+#endif  /* __SI476X_REPORTS_H__ */