From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C60F5C433E6 for ; Mon, 31 Aug 2020 22:06:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 689792083E for ; Mon, 31 Aug 2020 22:06:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="l2wE9skW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730411AbgHaWGZ (ORCPT ); Mon, 31 Aug 2020 18:06:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730392AbgHaWGU (ORCPT ); Mon, 31 Aug 2020 18:06:20 -0400 Received: from mail-qv1-xf36.google.com (mail-qv1-xf36.google.com [IPv6:2607:f8b0:4864:20::f36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E207CC061575; Mon, 31 Aug 2020 15:06:17 -0700 (PDT) Received: by mail-qv1-xf36.google.com with SMTP id cy2so2658030qvb.0; Mon, 31 Aug 2020 15:06:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ar47oE9l+B4PpQ/b+8/BG1tbQtXjslKPOJJiWjt1tFc=; b=l2wE9skWNHSdZ85d4PC/G5d49zpAsJk3a50M3RaPuXVcU06b1vfgMRygW4TjTpcapq oLq6J9yMKwH6mauc21P6APt3vIvOSjCvGV/9KOdBFOPnUhJjzyYdriy0heSWULZ6r5RG rtXNhDd4xRnltOQ+rMCrTim60XQ4hc8T9gBU2tlIuzkh2jrqCgeGMxQwNeyz85JJvs/e Uv/5o0xlFBEnpOB1/DruvP7Z7E4UwevdjTTF2E5ZdxguKoMmeEhCkMfdO7poMyDNu5gm qbn8O5d1yDfDerp1BxwXKNs7QJVSARy3Gfd4njCcShsPTL7u3iUlKE2I39jLwRnhZiod opnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ar47oE9l+B4PpQ/b+8/BG1tbQtXjslKPOJJiWjt1tFc=; b=V1dKJ/gsss4BOiqJgOEiQL/CS6CWkxgW8aV5Jn6SSqgc7aaDAQcC+rVw34ybZYtDd8 6IKMcBHBeD2mOKnDUzJbhJtd1G2r6GlAVnk8OHxjrW6tQXOcWLzYONmSVcaLIOTRylWQ it6FURBWco6uU9zMCoywSejQC+FnZ9TYwMOzE+VLuJEt4XHB6Vglu4oP7aEySLPy+iGO MeM9W6FeTedKtqz1vfCGfTFyTSqzu+1qWRUH3Wmsj3ST9zsEpgitAyPWUCXU6MxrJaEW XYLFbwdnr+6+Xtfqj+KRD6JvhrvnBY3XAn8mE8j5IACQyV4ukj7ScUvI87FPaz2sjwV8 RqcQ== X-Gm-Message-State: AOAM532+QbS04aRWFDUVcHb0gfL2Vi7ruOjRCb502+PZJdfK4NLDW7Zl Uu9zv5p9nnSs6WKOWCWlavMqOy5l0iUKScQA X-Google-Smtp-Source: ABdhPJx+gGy9ZMkGTI1MEpP8Zhq/WhO7POKfWZySCB860yoOTQVCKaMZM/BlZhFCjX7BVH1f4tQELQ== X-Received: by 2002:ad4:510c:: with SMTP id g12mr3223943qvp.106.1598911575354; Mon, 31 Aug 2020 15:06:15 -0700 (PDT) Received: from localhost.localdomain ([190.189.67.136]) by smtp.gmail.com with ESMTPSA id d10sm3051232qkk.1.2020.08.31.15.06.12 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 31 Aug 2020 15:06:14 -0700 (PDT) From: Santiago Hormazabal To: linux-media@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring , Ezequiel Garcia , Hans Verkuil , Mauro Carvalho Chehab , linux-kernel@vger.kernel.org Cc: Santiago Hormazabal Subject: [PATCH 2/3] media: Add support for the AM/FM radio chip KT0913 from KT Micro. Date: Mon, 31 Aug 2020 19:06:00 -0300 Message-Id: <20200831220601.20794-3-santiagohssl@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200831220601.20794-1-santiagohssl@gmail.com> References: <20200831220601.20794-1-santiagohssl@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This chip requires almost no support components and can used over I2C. The driver uses the I2C bus and exposes the controls as a V4L2 radio. Tested with a module that contains this chip (from SZZSJDZ.com, part number ZJ-801B, even tho the company seems defunct now), and an H2+ AllWinner SoC running a kernel built off 07d999f of the media_tree. Signed-off-by: Santiago Hormazabal --- drivers/media/radio/Kconfig | 10 + drivers/media/radio/Makefile | 1 + drivers/media/radio/radio-kt0913.c | 1196 ++++++++++++++++++++++++++++ 3 files changed, 1207 insertions(+) create mode 100644 drivers/media/radio/radio-kt0913.c diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig index d29e29645e04..ac9053a95f3a 100644 --- a/drivers/media/radio/Kconfig +++ b/drivers/media/radio/Kconfig @@ -226,6 +226,16 @@ config RADIO_WL1273 # TI's ST based wl128x FM radio source "drivers/media/radio/wl128x/Kconfig" +config RADIO_KT0913 + tristate "KT0913 I2C FM/AM radio support" + depends on I2C && VIDEO_V4L2 + help + Say Y here if you want to use the KT0913 FM/AM chip. + This is a low cost chip that uses the I2C bus. + + To compile this driver as a module, choose M here: the + module will be called radio-kt0913. + # # ISA drivers configuration # diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile index 53c7ae135460..a314121f7771 100644 --- a/drivers/media/radio/Makefile +++ b/drivers/media/radio/Makefile @@ -34,5 +34,6 @@ obj-$(CONFIG_RADIO_WL1273) += radio-wl1273.o obj-$(CONFIG_RADIO_WL128X) += wl128x/ obj-$(CONFIG_RADIO_TEA575X) += tea575x.o obj-$(CONFIG_USB_RAREMONO) += radio-raremono.o +obj-$(CONFIG_RADIO_KT0913) += radio-kt0913.o shark2-objs := radio-shark2.o radio-tea5777.o diff --git a/drivers/media/radio/radio-kt0913.c b/drivers/media/radio/radio-kt0913.c new file mode 100644 index 000000000000..067d7ceac079 --- /dev/null +++ b/drivers/media/radio/radio-kt0913.c @@ -0,0 +1,1196 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * drivers/media/radio/radio-kt0913.c + * + * Driver for the KT0913 radio chip from KTMicro. + * This driver provides a v4l2 interface to the tuner, using the I2C + * protocol to communicate with the chip. + * It exposes two bands, one for AM and another for FM. If the "campus + * band" feature needs to be enabled, set the corresponding module parameter + * to 1. + * Reference Clock and Audio DAC anti-pop configurations should be + * set via a device tree node. Defaults will be used otherwise. + * + * Audio output should be routed to a speaker or an audio capture + * device. + * + * Based on radio-tea5764 by Fabio Belavenuto + * + * Copyright (c) 2020 Santiago Hormazabal + * + * TODO: + * use rd and wr support for the regmap instead of volatile regs. + * add support for the hardware-assisted frequency seek. + * export FM SNR and AM/FM AFC deviation values as RO controls. + * support the kt0915 chip. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + /* ************************************************************************* */ + + /* registers of the kt0913 */ +#define KT0913_REG_CHIP_ID 0x01 +#define KT0913_REG_SEEK 0x02 +#define KT0913_REG_TUNE 0x03 +#define KT0913_REG_VOLUME 0x04 +#define KT0913_REG_DSPCFGA 0x05 +#define KT0913_REG_LOCFGA 0x0a +#define KT0913_REG_LOCFGC 0x0c +#define KT0913_REG_RXCFG 0x0f +#define KT0913_REG_STATUSA 0x12 +#define KT0913_REG_STATUSB 0x13 +#define KT0913_REG_STATUSC 0x14 +#define KT0913_REG_AMSYSCFG 0x16 +#define KT0913_REG_AMCHAN 0x17 +#define KT0913_REG_AMCALI 0x18 +#define KT0913_REG_GPIOCFG 0x1d +#define KT0913_REG_AMDSP 0x22 +#define KT0913_REG_AMSTATUSA 0x24 +#define KT0913_REG_AMSTATUSB 0x25 +#define KT0913_REG_SOFTMUTE 0x2e +#define KT0913_REG_AMCFG 0x33 +#define KT0913_REG_AMCFG2 0x34 +#define KT0913_REG_AFC 0x3c + +/* register symbols masks, values and shift count */ +#define KT0913_TUNE_FMTUNE_MASK 0x8000 /* FM Tune enable */ +#define KT0913_TUNE_FMTUNE_ON 0x8000 /* FM Tune enabled */ +#define KT0913_TUNE_FMTUNE_OFF 0x0000 /* FM Tune disabled */ +#define KT0913_TUNE_FMCHAN_MASK 0x0fff /* frequency in kHz / 50kHz */ + +#define KT0913_VOLUME_DMUTE_MASK 0x2000 +#define KT0913_VOLUME_DMUTE_ON 0x0000 +#define KT0913_VOLUME_DMUTE_OFF 0x2000 +#define KT0913_VOLUME_DE_MASK 0x0800 /* de-emphasis time constant */ +#define KT0913_VOLUME_DE_75US 0x0000 /* 75us */ +#define KT0913_VOLUME_DE_50US 0x0800 /* 50us */ +#define KT0913_VOLUME_POP_MASK 0x30 /* audio dac anti-pop config */ +#define KT0913_VOLUME_POP_SHIFT 4 + +#define KT0913_DSPCFGA_MONO_MASK 0x8000 /* mono select (0=stereo, 1=mono) */ +#define KT0913_DSPCFGA_MONO_ON 0x8000 /* mono */ +#define KT0913_DSPCFGA_MONO_OFF 0x0000 /* stereo */ + +#define KT0913_LOCFG_CAMPUSBAND_EN_MASK 0x0008 /* campus band fm enable */ +#define KT0913_LOCFG_CAMPUSBAND_EN_ON 0x0008 /* FM range 64-110MHz */ +#define KT0913_LOCFG_CAMPUSBAND_EN_OFF 0x0000 /* FM range 32-110MHz */ + +#define KT0913_RXCFGA_STDBY_MASK 0x1000 /* standby mode enable */ +#define KT0913_RXCFGA_STDBY_ON 0x1000 /* standby mode enabled */ +#define KT0913_RXCFGA_STDBY_OFF 0x0000 /* standby mode disabled */ +#define KT0913_RXCFGA_VOLUME_MASK 0x001f /* volume control */ + +#define KT0913_STATUSA_XTAL_OK 0x8000 /* crystal ready indicator */ +#define KT0913_STATUSA_STC 0x4000 /* seek/tune complete */ + +#define KT0913_STATUSA_PLL_LOCK_MASK 0x800 /* system pll ready indicator */ +#define KT0913_STATUSA_PLL_LOCK_LOCKED 0x800 /* system pll ready */ +#define KT0913_STATUSA_PLL_LOCK_UNLOCKED 0x000 /* not ready */ +#define KT0913_STATUSA_LO_LOCK 0x400 /* LO synthesizer ready indicator */ +#define KT0913_STATUSA_ST_MASK 0x300 /* stereo indicator (0x300=stereo, otherwise mono) */ +#define KT0913_STATUSA_ST_STEREO 0x300 /* stereo */ +#define KT0913_STATUSA_FMRSSI_MASK 0xf8 /* FM RSSI (-100dBm + FMRSSI*3dBm) */ +#define KT0913_STATUSA_FMRSSI_SHIFT 3 + +#define KT0913_STATUSC_PWSTATUS 0x8000 /* power status indicator */ +#define KT0913_STATUSC_CHIPRDY 0x2000 /* chip ready indicator */ +#define KT0913_STATUSC_FMSNR 0x1fc0 /* FM SNR (unknown units) */ + +#define KT0913_AMCHAN_AMTUNE_MASK 0x8000 /* AM tune enable */ +#define KT0913_AMCHAN_AMTUNE_ON 0x8000 /* AM tune enabled */ +#define KT0913_AMCHAN_AMTUNE_OFF 0x0000 /* AM tune disabled */ +#define KT0913_AMCHAN_AMCHAN_MASK 0x7ff /* am channel in kHz */ + +#define KT0913_AMSYSCFG_AM_FM_MASK 0x8000 /* am/fm mode control */ +#define KT0913_AMSYSCFG_AM_FM_AM 0x8000 /* am mode */ +#define KT0913_AMSYSCFG_AM_FM_FM 0x0000 /* fm mode (default) */ +#define KT0913_AMSYSCFG_REFCLK_MASK 0x0f00 /* reference clock selection */ +#define KT0913_AMSYSCFG_REFCLK_SHIFT 8 +#define KT0913_AMSYSCFG_AU_GAIN_MASK 0x00c0 /* audio gain selection */ +#define KT0913_AMSYSCFG_AU_GAIN_6DB 0x0040 /* 6dB audio gain */ +#define KT0913_AMSYSCFG_AU_GAIN_3DB 0x0000 /* 3dB audio gain (default) */ +#define KT0913_AMSYSCFG_AU_GAIN_0DB 0x00c0 /* 0dB audio gain */ +#define KT0913_AMSYSCFG_AU_GAIN_MIN_3DB 0x0080 /* -3dB audio gain */ + +#define KT0913_AMSTATUSA_AMRSSI_MASK 0x1f00 /* am channel rssi */ +#define KT0913_AMSTATUSA_AMRSSI_SHIFT 8 + +/* constants */ +#define KT0913_CHIP_ID 0x544B /* ASCII of 'KT' */ + +#define V4L2_KHZ_FREQ_MUL 16U /* v4l2 uses 16x the kHz value as their freq */ +#define KT0913_FMCHAN_MUL 50U /* kt0913 uses freqs with a 50kHz multiplier */ +#define KT0913_FM_RANGE_LOW_NO_CAMPUS 64000U /* 64MHz lower bound for FM */ +#define KT0913_FM_RANGE_LOW_CAMPUS 32000U /* 32MHz lower bound for campus FM */ +#define KT0913_FM_RANGE_HIGH 110000U /* 110MHz upper bound for FM */ +#define KT0913_AM_RANGE_LOW 500U /* 500kHz lower bound for AM */ +#define KT0913_AM_RANGE_HIGH 1710U /* 1710kHz upper bound for AM */ + +#define KT0913_FM_AM_DRIVER_NAME "kt0913" + +/* ************************************************************************* */ + +/* v4l2 device number to use. -1 will assign the next free one */ +static int kt0913_v4l2_radio_nr = -1; +/* use the extended range of FM down to 32MHz. disabled by default */ +static int kt0913_use_campus_band; + +/* ************************************************************************* */ + +/* kt0913 status struct */ +struct kt0913_device { + struct v4l2_device v4l2_dev; /* main v4l2 struct */ + struct i2c_client *client; /* I2C client */ + struct video_device vdev; /* vide_device struct */ + struct v4l2_ctrl_handler ctrl_handler; /* ctrl_handler struct */ + + /* V4L2 Controls */ + struct v4l2_ctrl *ctrl_pll_lock; /* PLL lock */ + struct v4l2_ctrl *ctrl_volume; /* Overall volume */ + struct v4l2_ctrl *ctrl_au_gain; /* Audio Gain */ + struct v4l2_ctrl *ctrl_mute; /* Master mute */ + struct v4l2_ctrl *ctrl_deemp; /* Deemphasis */ + + /* current operation band (fm, fm_campus, am) */ + unsigned int band; + + /* audio dac anti-pop setting: + * 0 -> 100uF (default) + * 1 -> 60uF + * 2 -> 20uF + * 3 -> 10uF + */ + unsigned int audio_anti_pop; + + /* reference clock selection: + * 0 -> 32.768kHz (default) + * 1 -> 6.5MHz + * 2 -> 7.6MHz + * 3 -> 12MHz + * 4 -> 13MHz + * 5 -> 15.2MHz + * 6 -> 19.2MHz + * 7 -> 24MHz + * 8 -> 26MHz + * 9 -> 38kHz + */ + unsigned int refclock_val; + + /* Regmap */ + struct regmap *regmap; + + /* For core assisted locking */ + struct mutex mutex; +}; + +/* ************************************************************************* */ + +/* Regmap settings */ +static const struct regmap_range kt0913_regmap_all_registers_range[] = { + regmap_reg_range(0x01, 0x05), + regmap_reg_range(0x0a, 0x0a), + regmap_reg_range(0x0c, 0x0c), + regmap_reg_range(0x0f, 0x0f), + regmap_reg_range(0x12, 0x14), + regmap_reg_range(0x16, 0x18), + regmap_reg_range(0x1d, 0x1d), + regmap_reg_range(0x22, 0x22), + regmap_reg_range(0x24, 0x25), + regmap_reg_range(0x2e, 0x2f), + regmap_reg_range(0x30, 0x34), + regmap_reg_range(0x3a, 0x3a), + regmap_reg_range(0x3c, 0x3c), +}; + +static const struct regmap_access_table kt0913_all_registers_access_table = { + .yes_ranges = kt0913_regmap_all_registers_range, + .n_yes_ranges = ARRAY_SIZE(kt0913_regmap_all_registers_range), +}; + +static const struct reg_sequence kt0913_init_regs_to_defaults[] = { + /* Standby disabled, volume 0dB */ + { KT0913_REG_RXCFG, 0x881f }, + /* FM Channel spacing = 50kHz, Right & Left unmuted */ + { KT0913_REG_SEEK, 0x000b }, + /* Stereo, High Stereo/Mono blend level, blend disabled */ + { KT0913_REG_DSPCFGA, 0x1000 }, + /* FM AFC Enabled */ + { KT0913_REG_LOCFGA, 0x0100 }, + /* Campus band disabled by default */ + { KT0913_REG_LOCFGC, 0x0024 }, + /* + * FM mode, internal defined bands, clock from XT, 32.768kHz + * 3dB audio gain, AM AFC Enabled + */ + { KT0913_REG_AMSYSCFG, 0x0002 }, + /* Default AM freq = 504kHz */ + { KT0913_REG_AMCHAN, 0x01f8}, + /* VOL and CH GPIOs set to HiZ */ + { KT0913_REG_GPIOCFG, 0x0000 }, + /* AM Channel bandwidth = 6kHz, non-differential output */ + { KT0913_REG_AMDSP, 0xafc4 }, + /* + * softmute is disabled on AM and FM, but set the defaults: + * strong softmute attn., slow softmute attack/recover, + * lowest AM softumte start level, almost the minimum + * softmute target volume, RSSI mode for softmute, lowest + * FM softmute start level + */ + { KT0913_REG_SOFTMUTE, 0x0010 }, + /* 1kHz for AM channel space, working mode A for the keys */ + { KT0913_REG_AMCFG, 0x1401 }, + /* TIME1 = shortest, TIME2 = fastest */ + { KT0913_REG_AMCFG, 0x4050 }, + /* set 86MHz as the default frequency, and tune it */ + { KT0913_REG_TUNE, 0x86b8 }, + /* + * FM&AM Softmute disabled, Mute disabled, 75us deemp., + * no bass boost, 100uF anti pop cap + */ + { KT0913_REG_VOLUME, 0xe080 }, +}; + +static const struct regmap_config kt0913_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .max_register = KT0913_REG_AFC, + .volatile_table = &kt0913_all_registers_access_table, + .cache_type = REGCACHE_RBTREE, + .val_format_endian = REGMAP_ENDIAN_BIG, +}; + +/* ************************************************************************* */ + +/* bands where the kt0913 operates */ +enum { BAND_FM, BAND_FM_CAMPUS, BAND_AM }; + +static const struct v4l2_frequency_band kt0913_bands[] = { + { + /* BAND_FM */ + .type = V4L2_TUNER_RADIO, + .index = 0, /* index provided to v4l2 */ + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = KT0913_FM_RANGE_LOW_NO_CAMPUS * V4L2_KHZ_FREQ_MUL, + .rangehigh = KT0913_FM_RANGE_HIGH * V4L2_KHZ_FREQ_MUL, + .modulation = V4L2_BAND_MODULATION_FM, + }, + { + /* BAND_FM_CAMPUS */ + .type = V4L2_TUNER_RADIO, + .index = 0, /* index provided to v4l2 */ + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = KT0913_FM_RANGE_LOW_CAMPUS * V4L2_KHZ_FREQ_MUL, + .rangehigh = KT0913_FM_RANGE_HIGH * V4L2_KHZ_FREQ_MUL, + .modulation = V4L2_BAND_MODULATION_FM, + }, + { + /* BAND_AM */ + .type = V4L2_TUNER_RADIO, + .index = 1, /* index provided to v4l2 */ + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = KT0913_AM_RANGE_LOW * V4L2_KHZ_FREQ_MUL, + .rangehigh = KT0913_AM_RANGE_HIGH * V4L2_KHZ_FREQ_MUL, + .modulation = V4L2_BAND_MODULATION_AM, + }, +}; + +/* ************************************************************************* */ + +static inline struct kt0913_device * +v4l2_device_to_device(struct v4l2_device *v4l2_dev) +{ + return container_of(v4l2_dev, + struct kt0913_device, v4l2_dev); +} + +static inline struct kt0913_device * +v4l2_ctrl_to_device(struct v4l2_ctrl *ctrl_handler) +{ + return container_of(ctrl_handler->handler, + struct kt0913_device, ctrl_handler); +} + +/* ************************************************************************* */ + +static inline u32 khz_to_v4l2_freq(unsigned int freq) +{ + return freq * V4L2_KHZ_FREQ_MUL; +} + +static inline unsigned int v4l2_freq_to_khz(u32 v4l2_freq) +{ + return v4l2_freq / V4L2_KHZ_FREQ_MUL; +} + +/* ************************************************************************* */ + +static int __kt0913_get_fm_frequency(struct kt0913_device *radio, + unsigned int *frequency) +{ + unsigned int tune_reg; + int ret = regmap_read(radio->regmap, KT0913_REG_TUNE, &tune_reg); + + if (ret) + return ret; + + *frequency = (tune_reg & KT0913_TUNE_FMCHAN_MASK) * KT0913_FMCHAN_MUL; + + return 0; +} + +static int __kt0913_set_fm_frequency(struct kt0913_device *radio, + unsigned int frequency) +{ + return regmap_write(radio->regmap, KT0913_REG_TUNE, + KT0913_TUNE_FMTUNE_ON | (frequency / KT0913_FMCHAN_MUL)); +} + +/* ************************************************************************* */ + +static int __kt0913_set_mute(struct kt0913_device *radio, int on) +{ + return regmap_update_bits(radio->regmap, + KT0913_REG_VOLUME, KT0913_VOLUME_DMUTE_MASK, + on ? KT0913_VOLUME_DMUTE_ON : KT0913_VOLUME_DMUTE_OFF); +} + +/* ************************************************************************* */ + +static int __kt0913_set_deemphasis(struct kt0913_device *radio, s32 deemp) +{ + switch (deemp) { + case V4L2_DEEMPHASIS_75_uS: + return regmap_update_bits(radio->regmap, + KT0913_REG_VOLUME, KT0913_VOLUME_DE_MASK, + KT0913_VOLUME_DE_50US); + + /* 50us is used for the disabled option (which is not supported + * on the chip) and the 50uS value + */ + default: + return regmap_update_bits(radio->regmap, + KT0913_REG_VOLUME, KT0913_VOLUME_DE_MASK, + KT0913_VOLUME_DE_75US); + } +} + +/* ************************************************************************* */ + +static int __kt0913_set_volume(struct kt0913_device *radio, s32 volume) +{ + /* map [-60, 0] to [1, 31] which is what the kt0913 expects */ + volume = (volume / 2) + 31; + return regmap_update_bits(radio->regmap, + KT0913_REG_RXCFG, KT0913_RXCFGA_VOLUME_MASK, + volume); +} + +/* ************************************************************************* */ + +static int __kt0913_set_standby(struct kt0913_device *radio, int standby) +{ + return regmap_update_bits(radio->regmap, + KT0913_REG_RXCFG, KT0913_RXCFGA_STDBY_MASK, + standby ? KT0913_RXCFGA_STDBY_ON : KT0913_RXCFGA_STDBY_OFF); +} + +/* ************************************************************************* */ + +static int __kt0913_get_pll_status(struct kt0913_device *radio, int *locked) +{ + unsigned int statusa_reg; + int ret = regmap_read(radio->regmap, KT0913_REG_STATUSA, &statusa_reg); + + if (ret) + return ret; + + *locked = (statusa_reg & KT0913_STATUSA_PLL_LOCK_MASK) == + KT0913_STATUSA_PLL_LOCK_LOCKED ? 1 : 0; + + return 0; +} + +/* ************************************************************************* */ + +static int __kt0913_get_rx_stereo_or_mono(struct kt0913_device *radio, + int *stereo) +{ + unsigned int statusa_reg; + int ret = regmap_read(radio->regmap, KT0913_REG_STATUSA, &statusa_reg); + + if (ret) + return ret; + + *stereo = (statusa_reg & KT0913_STATUSA_ST_MASK) == + KT0913_STATUSA_ST_STEREO ? 1 : 0; + + return 0; +} + +/* ************************************************************************* */ + +static int __kt0913_get_fm_rssi(struct kt0913_device *radio, s32 *rssi) +{ + unsigned int statusa_reg; + int ret = regmap_read(radio->regmap, KT0913_REG_STATUSA, &statusa_reg); + + if (ret) + return ret; + + /* RSSI(dBm) = -100 + FMRSSI<4:0> * 3dBm + * even tho we can get the value in dBm, we want a % + */ + *rssi = (statusa_reg & KT0913_STATUSA_FMRSSI_MASK) >> + KT0913_STATUSA_FMRSSI_SHIFT; + /* map range 0-31 to 0-65535 */ + *rssi *= 65535; + *rssi /= KT0913_STATUSA_FMRSSI_MASK >> KT0913_STATUSA_FMRSSI_SHIFT; + + return 0; +} + +/* ************************************************************************* */ + +static int __kt0913_get_cfg_stereo_enabled(struct kt0913_device *radio, + int *stereo) +{ + unsigned int dspcfga_reg; + int ret = regmap_read(radio->regmap, KT0913_REG_DSPCFGA, &dspcfga_reg); + + if (ret) + return ret; + + *stereo = (dspcfga_reg & KT0913_DSPCFGA_MONO_MASK) == + KT0913_DSPCFGA_MONO_OFF ? 1 : 0; + + return ret; +} + +static int __kt0913_set_cfg_stereo_enabled(struct kt0913_device *radio, + int stereo) +{ + return regmap_update_bits(radio->regmap, + KT0913_REG_DSPCFGA, KT0913_DSPCFGA_MONO_MASK, + stereo ? KT0913_DSPCFGA_MONO_OFF : KT0913_DSPCFGA_MONO_ON); +} + +/* ************************************************************************* */ + +static int __kt0913_set_au_gain(struct kt0913_device *radio, s32 gain) +{ + switch (gain) { + case 6: + return regmap_update_bits(radio->regmap, + KT0913_REG_AMSYSCFG, KT0913_AMSYSCFG_AU_GAIN_MASK, + KT0913_AMSYSCFG_AU_GAIN_6DB); + case 3: + return regmap_update_bits(radio->regmap, + KT0913_REG_AMSYSCFG, KT0913_AMSYSCFG_AU_GAIN_MASK, + KT0913_AMSYSCFG_AU_GAIN_3DB); + case 0: + return regmap_update_bits(radio->regmap, + KT0913_REG_AMSYSCFG, KT0913_AMSYSCFG_AU_GAIN_MASK, + KT0913_AMSYSCFG_AU_GAIN_0DB); + case -3: + return regmap_update_bits(radio->regmap, + KT0913_REG_AMSYSCFG, KT0913_AMSYSCFG_AU_GAIN_MASK, + KT0913_AMSYSCFG_AU_GAIN_MIN_3DB); + default: + return -EINVAL; + } +} + +/* ************************************************************************* */ + +static int __kt0913_set_am_fm_band(struct kt0913_device *radio, + unsigned int band) +{ + return regmap_update_bits(radio->regmap, + KT0913_REG_AMSYSCFG, KT0913_AMSYSCFG_AM_FM_MASK, + band == BAND_AM ? + KT0913_AMSYSCFG_AM_FM_AM : KT0913_AMSYSCFG_AM_FM_FM); +} + +/* ************************************************************************* */ + +static int __kt0913_get_am_frequency(struct kt0913_device *radio, + unsigned int *frequency) +{ + unsigned int amchan_reg; + int ret = regmap_read(radio->regmap, KT0913_REG_AMCHAN, &amchan_reg); + + if (ret) + return ret; + + *frequency = (amchan_reg & KT0913_AMCHAN_AMCHAN_MASK); + + return 0; +} + +static int __kt0913_set_am_frequency(struct kt0913_device *radio, + unsigned int frequency) +{ + return regmap_write(radio->regmap, KT0913_REG_AMCHAN, + KT0913_AMCHAN_AMTUNE_ON | frequency); +} + +/* ************************************************************************* */ + +static int __kt0913_get_am_rssi(struct kt0913_device *radio, s32 *rssi) +{ + unsigned int amstatusa_reg; + int ret = regmap_read(radio->regmap, + KT0913_REG_AMSTATUSA, &amstatusa_reg); + + if (ret) + return ret; + + /* AMRSSI(dBm) = -90 + AMRSSI<4:0> * 3dBm + * even tho we can get the value in dBm, we want a % + */ + *rssi = (amstatusa_reg & KT0913_AMSTATUSA_AMRSSI_MASK) >> + KT0913_AMSTATUSA_AMRSSI_SHIFT; + /* map range 0-31 to 0-65535 */ + *rssi *= 65535; + *rssi /= KT0913_AMSTATUSA_AMRSSI_MASK >> KT0913_AMSTATUSA_AMRSSI_SHIFT; + + return 0; +} + +/* ************************************************************************* */ + +static int __kt0913_init(struct kt0913_device *radio) +{ + int ret = 0; + + /* write the defaults */ + ret = regmap_multi_reg_write(radio->regmap, + kt0913_init_regs_to_defaults, + ARRAY_SIZE(kt0913_init_regs_to_defaults)); + if (ret) { + v4l2_err(radio->client, + "regmap_multi_reg_write() failed! %d", ret); + return ret; + } + + /* set the audio dac anti-pop config */ + ret = regmap_update_bits(radio->regmap, + KT0913_REG_VOLUME, KT0913_VOLUME_POP_MASK, + radio->audio_anti_pop << + KT0913_VOLUME_POP_SHIFT); + if (ret) { + v4l2_err(radio->client, + "regmap_update_bits() err on anti-pop cfg! %d", ret); + return ret; + } + + /* set the reference clock config */ + ret = regmap_update_bits(radio->regmap, + KT0913_REG_AMSYSCFG, + KT0913_AMSYSCFG_REFCLK_MASK, + radio->refclock_val << + KT0913_AMSYSCFG_REFCLK_SHIFT); + if (ret) { + v4l2_err(radio->client, + "regmap_update_bits() err on refclk cfg! %d", ret); + return ret; + } + + if (kt0913_use_campus_band) { + v4l2_info(radio->client, + "campus band is enabled!"); + /* set the campus band bit */ + ret = regmap_update_bits(radio->regmap, + KT0913_REG_LOCFGC, + KT0913_LOCFG_CAMPUSBAND_EN_MASK, + KT0913_LOCFG_CAMPUSBAND_EN_ON); + if (ret) { + v4l2_err(radio->client, + "regmap_update_bits() err on campus band! %d", + ret); + return ret; + } + } + + return __kt0913_set_mute(radio, true); +} + +/* ************************************************************************* */ + +static int kt0913_ioctl_vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct kt0913_device *radio = video_drvdata(file); + int ret; + + if (f->tuner != 0) + return -EINVAL; + + f->type = V4L2_TUNER_RADIO; + + if (radio->band == BAND_AM) + ret = __kt0913_get_am_frequency(radio, &f->frequency); + else + ret = __kt0913_get_fm_frequency(radio, &f->frequency); + + if (ret) + return ret; + + /* convert kHz freq into v4l2 freq */ + f->frequency = khz_to_v4l2_freq(f->frequency); + + return 0; +} + +static int kt0913_ioctl_vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *f) +{ + struct kt0913_device *radio = video_drvdata(file); + unsigned int freq = f->frequency; + unsigned int new_band; + unsigned int half_gap_freq; + int ret; + + if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) + return -EINVAL; + + if (freq == 0) + return -EINVAL; + + /* calculate the middle frequency on the gap of the bands */ + half_gap_freq = kt0913_bands[BAND_AM].rangehigh; + + if (kt0913_use_campus_band) + /* using the AM band and the campus FM band if enabled */ + half_gap_freq += kt0913_bands[BAND_FM_CAMPUS].rangelow; + else + /* or using the AM band and the standard FM band */ + half_gap_freq += kt0913_bands[BAND_FM].rangelow; + + half_gap_freq /= 2; + + if (freq <= half_gap_freq) + new_band = BAND_AM; + else if (freq <= kt0913_bands[BAND_FM].rangelow && + kt0913_use_campus_band) + new_band = BAND_FM_CAMPUS; + else + new_band = BAND_FM; + + /* is the requested band different than the one currently set? */ + if (radio->band != new_band) { + /* update the band on the device */ + ret = __kt0913_set_am_fm_band(radio, new_band); + if (ret) + return ret; + radio->band = new_band; + } + + /* clamp the frequency to the band boundaries */ + freq = clamp(freq, kt0913_bands[new_band].rangelow, + kt0913_bands[new_band].rangehigh); + + /* convert v4l2 freq to kHz */ + freq = v4l2_freq_to_khz(freq); + + if (radio->band == BAND_AM) + return __kt0913_set_am_frequency(radio, freq); + else + return __kt0913_set_fm_frequency(radio, freq); +} + +static int kt0913_ioctl_vidioc_enum_freq_bands(struct file *file, void *priv, + struct v4l2_frequency_band *band) +{ + if (band->tuner != 0) + return -EINVAL; + + switch (band->index) { + case 0: + if (kt0913_use_campus_band) + *band = kt0913_bands[BAND_FM_CAMPUS]; + else + *band = kt0913_bands[BAND_FM]; + return 0; + case 1: + *band = kt0913_bands[BAND_AM]; + return 0; + default: + return -EINVAL; + } +} + +/* ************************************************************************* */ + +/* V4L2 vidioc */ +static int kt0913_ioctl_vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *capability) +{ + struct kt0913_device *radio = video_drvdata(file); + struct video_device *dev; + + if (!radio) + return -ENODEV; + + dev = &radio->vdev; + + if (!dev) + return -ENODEV; + + strscpy(capability->driver, KT0913_FM_AM_DRIVER_NAME, + sizeof(capability->driver)); + strscpy(capability->card, dev->name, sizeof(capability->card)); + snprintf(capability->bus_info, sizeof(capability->bus_info), + "I2C:%s", dev_name(&dev->dev)); + return 0; +} + +static int kt0913_ioctl_vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *v) +{ + struct kt0913_device *radio = video_drvdata(file); + int ret; + int stereo_enabled; + int is_stereo; + + if (v->index != 0) + return -EINVAL; + + strscpy(v->name, "FM/AM", sizeof(v->name)); + v->type = V4L2_TUNER_RADIO; + + v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_FREQ_BANDS; + + v->rangelow = kt0913_bands[BAND_AM].rangelow; + v->rangehigh = kt0913_bands[BAND_FM].rangehigh; + + if (radio->band == BAND_AM) { + v->rxsubchans = V4L2_TUNER_SUB_MONO; + v->audmode = V4L2_TUNER_MODE_MONO; + + ret = __kt0913_get_am_rssi(radio, &v->signal); + if (ret) + return ret; + } else { + ret = __kt0913_get_cfg_stereo_enabled(radio, &stereo_enabled); + if (ret) + return ret; + + v->rxsubchans = stereo_enabled ? + V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO; + + ret = __kt0913_get_rx_stereo_or_mono(radio, &is_stereo); + if (ret) + return ret; + + v->audmode = is_stereo ? + V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO; + + ret = __kt0913_get_fm_rssi(radio, &v->signal); + if (ret) + return ret; + } + + /* AFC is enabled and active by default */ + v->afc = 1; + + return 0; +} + +static int kt0913_ioctl_vidioc_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *v) +{ + struct kt0913_device *radio = video_drvdata(file); + + if (v->index != 0) + return -EINVAL; + + /* only mono and stereo are supported */ + if (v->audmode != V4L2_TUNER_MODE_MONO && + v->audmode != V4L2_TUNER_MODE_STEREO) + return 0; + + /* AM is mono only, so don't try to set it to stereo */ + if (radio->band == BAND_AM && v->audmode != V4L2_TUNER_MODE_MONO) + return 0; + + /* set to stereo if specified, otherwise set to mono */ + return __kt0913_set_cfg_stereo_enabled(radio, + v->audmode == V4L2_TUNER_MODE_STEREO); +} + +static int kt0913_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct kt0913_device *radio = v4l2_ctrl_to_device(ctrl); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + return __kt0913_set_mute(radio, ctrl->val); + case V4L2_CID_AUDIO_VOLUME: + return __kt0913_set_volume(radio, ctrl->val); + case V4L2_CID_GAIN: + return __kt0913_set_au_gain(radio, ctrl->val); + case V4L2_CID_TUNE_DEEMPHASIS: + return __kt0913_set_deemphasis(radio, ctrl->val); + default: + return -EINVAL; + } +} + +static int kt0913_g_volatile_ctrl(struct v4l2_ctrl *ctrl) +{ + struct kt0913_device *radio = v4l2_ctrl_to_device(ctrl); + + switch (ctrl->id) { + case V4L2_CID_RF_TUNER_PLL_LOCK: + return __kt0913_get_pll_status(radio, &ctrl->val); + default: + return -EINVAL; + } +} + +static const struct v4l2_ctrl_ops kt0913_ctrl_ops = { + .s_ctrl = kt0913_s_ctrl, + .g_volatile_ctrl = kt0913_g_volatile_ctrl, +}; + +/* ************************************************************************* */ + +/* File system interface (use the ancillary fops for v4l2) */ +static const struct v4l2_file_operations kt0913_radio_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = v4l2_fh_release, + .poll = v4l2_ctrl_poll, + .unlocked_ioctl = video_ioctl2, +}; + +/* ioctl ops */ +static const struct v4l2_ioctl_ops kt0913_ioctl_ops = { + .vidioc_querycap = kt0913_ioctl_vidioc_querycap, + .vidioc_g_tuner = kt0913_ioctl_vidioc_g_tuner, + .vidioc_s_tuner = kt0913_ioctl_vidioc_s_tuner, + .vidioc_g_frequency = kt0913_ioctl_vidioc_g_frequency, + .vidioc_s_frequency = kt0913_ioctl_vidioc_s_frequency, + .vidioc_enum_freq_bands = kt0913_ioctl_vidioc_enum_freq_bands, + /* use ancillary functions for these: */ + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +/* V4L2 RADIO device structure */ +static struct video_device kt0913_radio_template = { + .name = KT0913_FM_AM_DRIVER_NAME, + .fops = &kt0913_radio_fops, + .ioctl_ops = &kt0913_ioctl_ops, + .release = video_device_release_empty, + .vfl_dir = VFL_DIR_RX, + .device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO, +}; + +/* ************************************************************************* */ + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id kt0913_of_match[] = { + { .compatible = "ktm,kt0913" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, kt0913_of_match); +#endif /* IS_ENABLED(CONFIG_OF) */ + +static void __kt0913_parse_dt(struct kt0913_device *radio) +{ + const void *ptr_anti_pop = of_get_property(radio->client->dev.of_node, + "ktm,anti-pop", NULL); + const void *ptr_refclk = of_get_property(radio->client->dev.of_node, + "ktm,refclk", NULL); + + if (ptr_anti_pop) { + radio->audio_anti_pop = + clamp(be32_to_cpup(ptr_anti_pop), 0U, 3U); + } else { + radio->audio_anti_pop = 0; + v4l2_warn(radio->client, + "No ktm,anti-pop on dt node, using default"); + } + + if (ptr_refclk) { + radio->refclock_val = + clamp(be32_to_cpup(ptr_refclk), 0U, 9U); + } else { + radio->refclock_val = 0; + v4l2_warn(radio->client, + "No ktm,refclk on dt node, using default"); + } +} + +/* ************************************************************************* */ + +static int kt0913_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct kt0913_device *radio; + struct v4l2_device *v4l2_dev; + struct v4l2_ctrl_handler *hdl; + struct regmap *regmap; + int ret; + + pr_debug("%s\n", __func__); + + /* this driver uses word R/W i2c operations, check if it's supported */ + ret = i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA | + I2C_FUNC_SMBUS_WRITE_WORD_DATA); + if (!ret) { + v4l2_err(client, + "I2C adapter doesn't support word operations"); + return -EIO; + } + + /* check if the device exist on the bus before initializing it */ + ret = i2c_smbus_read_word_data(client, KT0913_REG_CHIP_ID); + if (ret < 0) { + v4l2_err(client, + "Error reading CHIP ID of the kt0913 (%d)", ret); + return ret; + } + + /* check if the CHIP ID register value matches the expected value */ + if (ret != KT0913_CHIP_ID) { + v4l2_err(radio->client, + "Invalid CHIP ID: 0x%x, expected 0x%x", + ret, KT0913_CHIP_ID); + return -ENODEV; + } + + v4l2_info(client, + "kt0913 found @ 0x%x (%s)\n", + client->addr, client->adapter->name); + + /* alloc context for the kt0913 radio struct */ + radio = devm_kzalloc(&client->dev, sizeof(*radio), GFP_KERNEL); + if (!radio) + return -ENOMEM; + + v4l2_dev = &radio->v4l2_dev; + ret = v4l2_device_register(&client->dev, v4l2_dev); + if (ret < 0) { + v4l2_err(client, + "could not register v4l2_dev\n"); + goto errfr; + } + + mutex_init(&radio->mutex); + + /* register the control handler from the context struct */ + hdl = &radio->ctrl_handler; + v4l2_ctrl_handler_init(hdl, 5); + + /* add the control: Mute */ + radio->ctrl_mute = v4l2_ctrl_new_std(hdl, &kt0913_ctrl_ops, + V4L2_CID_AUDIO_MUTE, + 0, 1, 1, 0); + if (hdl->error) { + ret = hdl->error; + v4l2_err(v4l2_dev, "Could not register control: mute\n"); + goto errunreg; + } + + /* add the control: Volume */ + radio->ctrl_volume = v4l2_ctrl_new_std(hdl, &kt0913_ctrl_ops, + V4L2_CID_AUDIO_VOLUME, + -60, 0, 2, 0); + if (hdl->error) { + ret = hdl->error; + v4l2_err(v4l2_dev, "Could not register control: Volume\n"); + goto errunreg; + } + + /* add the control: audio gain */ + radio->ctrl_au_gain = v4l2_ctrl_new_std(hdl, &kt0913_ctrl_ops, + V4L2_CID_GAIN, + -3, 6, 3, 3); + if (hdl->error) { + ret = hdl->error; + v4l2_err(v4l2_dev, "Could not register control: audio gain\n"); + goto errunreg; + } + radio->ctrl_au_gain->flags |= V4L2_CTRL_FLAG_SLIDER; + + /* add the control: PLL Lock */ + radio->ctrl_pll_lock = v4l2_ctrl_new_std(hdl, &kt0913_ctrl_ops, + V4L2_CID_RF_TUNER_PLL_LOCK, + 0, 1, 1, 0); + if (hdl->error) { + ret = hdl->error; + v4l2_err(v4l2_dev, "Could not register control: pll lock\n"); + goto errunreg; + } + radio->ctrl_pll_lock->flags |= (V4L2_CTRL_FLAG_VOLATILE | + V4L2_CTRL_FLAG_READ_ONLY); + + /* add the control: deemphasis */ + radio->ctrl_deemp = v4l2_ctrl_new_std_menu(hdl, &kt0913_ctrl_ops, + V4L2_CID_TUNE_DEEMPHASIS, + V4L2_DEEMPHASIS_75_uS, + 0, + V4L2_DEEMPHASIS_75_uS); + if (hdl->error) { + ret = hdl->error; + v4l2_err(v4l2_dev, "Could not register control: deemphasis\n"); + goto errunreg; + } + /* the control handler is ready to be used */ + v4l2_dev->ctrl_handler = hdl; + + radio->vdev = kt0913_radio_template; + radio->vdev.lock = &radio->mutex; + radio->vdev.v4l2_dev = v4l2_dev; + video_set_drvdata(&radio->vdev, radio); + + radio->client = client; + i2c_set_clientdata(client, radio); + + /* init the regmap of the kt0913 */ + regmap = devm_regmap_init_i2c(client, &kt0913_regmap_config); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + v4l2_err(client, + "devm_regmap_init_i2c() failed! %d", ret); + goto errunreg; + } + radio->regmap = regmap; + + __kt0913_parse_dt(radio); + + /* init the kt0913 into a known state */ + ret = __kt0913_init(radio); + if (ret) { + v4l2_err(client, + "__kt0913_init() failed! %d", ret); + goto errunreg; + } + + pm_runtime_get_noresume(&client->dev); + pm_runtime_set_active(&client->dev); + pm_runtime_enable(&client->dev); + pm_runtime_dont_use_autosuspend(&client->dev); + + ret = video_register_device(&radio->vdev, + VFL_TYPE_RADIO, kt0913_v4l2_radio_nr); + if (ret < 0) { + v4l2_err(client, + "Could not register video device!"); + goto error_pm_disable; + } + + v4l2_info(client, "registered."); + return 0; +error_pm_disable: + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); +errunreg: + v4l2_ctrl_handler_free(hdl); + v4l2_device_unregister(v4l2_dev); +errfr: + __kt0913_set_standby(radio, true); + kfree(radio); + return ret; +} + +static int kt0913_remove(struct i2c_client *client) +{ + struct kt0913_device *radio = i2c_get_clientdata(client); + + pr_debug("%s\n", __func__); + if (!radio) + return -EINVAL; + + __kt0913_set_standby(radio, true); + + pm_runtime_get_sync(&client->dev); + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); + + video_unregister_device(&radio->vdev); + v4l2_ctrl_handler_free(&radio->ctrl_handler); + v4l2_device_unregister(&radio->v4l2_dev); + + v4l2_info(client, "removed."); + return 0; +} + +/* ************************************************************************* */ + +#ifdef CONFIG_PM +static int kt0913_i2c_pm_runtime_suspend(struct device *dev) +{ + struct kt0913_device *radio = i2c_get_clientdata(to_i2c_client(dev)); + + pr_debug("%s\n", __func__); + if (!radio) + return 0; + + return __kt0913_set_standby(radio, true); +} + +static int kt0913_i2c_pm_runtime_resume(struct device *dev) +{ + struct kt0913_device *radio = i2c_get_clientdata(to_i2c_client(dev)); + + pr_debug("%s\n", __func__); + if (!radio) + return 0; + + return __kt0913_set_standby(radio, false); +} +#endif /* CONFIG_PM */ + +static const struct dev_pm_ops kt0913_i2c_pm_ops = { + SET_RUNTIME_PM_OPS(kt0913_i2c_pm_runtime_suspend, + kt0913_i2c_pm_runtime_resume, NULL) +}; + +static const struct i2c_device_id kt0913_idtable[] = { + { "kt0913", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(i2c, kt0913_idtable); + +static struct i2c_driver kt0913_driver = { + .driver = { + .name = "kt0913", + .of_match_table = of_match_ptr(kt0913_of_match), + .pm = &kt0913_i2c_pm_ops, + }, + .probe = kt0913_probe, + .remove = kt0913_remove, + .id_table = kt0913_idtable, +}; +module_i2c_driver(kt0913_driver); + +MODULE_AUTHOR("Santiago Hormazabal "); +MODULE_DESCRIPTION("KTMicro KT0913 AM/FM receiver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.0.3"); + +module_param(kt0913_use_campus_band, int, 0); +MODULE_PARM_DESC(kt0913_use_campus_band, "Use the Campus Band feature (FM range 32MHz-110MHz)"); +module_param(kt0913_v4l2_radio_nr, int, 0); +MODULE_PARM_DESC(kt0913_v4l2_radio_nr, "v4l2 device number to use (i.e. /dev/radioX)"); -- 2.24.1