From patchwork Wed Oct 12 14:10:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ramesh Shanmugasundaram X-Patchwork-Id: 37438 Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1buKPe-00007D-SZ; Wed, 12 Oct 2016 14:21:42 +0000 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.84_2/mailfrontend-5) with esmtp id 1buKPb-0001rz-8W; Wed, 12 Oct 2016 16:21:42 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755321AbcJLOVg (ORCPT + 1 other); Wed, 12 Oct 2016 10:21:36 -0400 Received: from relmlor3.renesas.com ([210.160.252.173]:32317 "EHLO relmlie2.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754538AbcJLOVa (ORCPT ); Wed, 12 Oct 2016 10:21:30 -0400 Received: from unknown (HELO relmlir4.idc.renesas.com) ([10.200.68.154]) by relmlie2.idc.renesas.com with ESMTP; 12 Oct 2016 23:18:52 +0900 Received: from relmlac1.idc.renesas.com (relmlac1.idc.renesas.com [10.200.69.21]) by relmlir4.idc.renesas.com (Postfix) with ESMTP id 22F7A4DC3D; Wed, 12 Oct 2016 23:18:52 +0900 (JST) Received: by relmlac1.idc.renesas.com (Postfix, from userid 0) id 1847A80030; Wed, 12 Oct 2016 23:18:52 +0900 (JST) Received: from relmlac1.idc.renesas.com (localhost [127.0.0.1]) by relmlac1.idc.renesas.com (Postfix) with ESMTP id 1148A8002F; Wed, 12 Oct 2016 23:18:52 +0900 (JST) Received: from relmlii2.idc.renesas.com [10.200.68.66] by relmlac1.idc.renesas.com with ESMTP id ZAE16054; Wed, 12 Oct 2016 23:18:51 +0900 X-IronPort-AV: E=Sophos;i="5.22,559,1449500400"; d="scan'208";a="222682499" Received: from unknown (HELO localhost.localdomain) ([172.29.43.62]) by relmlii2.idc.renesas.com with ESMTP; 12 Oct 2016 23:18:48 +0900 From: Ramesh Shanmugasundaram To: robh+dt@kernel.org, mark.rutland@arm.com, mchehab@kernel.org, hverkuil@xs4all.nl, sakari.ailus@linux.intel.com, crope@iki.fi Cc: chris.paterson2@renesas.com, laurent.pinchart@ideasonboard.com, geert@linux-m68k.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Ramesh Shanmugasundaram Subject: [RFC 1/5] media: i2c: max2175: Add MAX2175 support Date: Wed, 12 Oct 2016 15:10:25 +0100 Message-Id: <1476281429-27603-2-git-send-email-ramesh.shanmugasundaram@bp.renesas.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1476281429-27603-1-git-send-email-ramesh.shanmugasundaram@bp.renesas.com> References: <1476281429-27603-1-git-send-email-ramesh.shanmugasundaram@bp.renesas.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 6.0.0.2142326, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2016.10.12.141218 X-PMX-Spam: Gauge=IIIIIIII, Probability=8%, Report=' MULTIPLE_RCPTS 0.1, HTML_00_01 0.05, HTML_00_10 0.05, BODY_SIZE_10000_PLUS 0, CT_TEXT_PLAIN_UTF8_CAPS 0, IN_REP_TO 0, LEGITIMATE_NEGATE 0, LEGITIMATE_SIGNS 0, MSG_THREAD 0, MULTIPLE_REAL_RCPTS 0, NO_URI_HTTPS 0, REFERENCES 0, __ANY_URI 0, __CC_NAME 0, __CC_NAME_DIFF_FROM_ACC 0, __CC_REAL_NAMES 0, __CP_MEDIA_BODY 0, __CP_NAME_BODY 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __FRAUD_MONEY_CURRENCY 0, __FRAUD_MONEY_CURRENCY_DOLLAR 0, __FROM_DOMAIN_IN_ANY_CC2 0, __FROM_DOMAIN_IN_RCPT 0, __HAS_CC_HDR 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __IN_REP_TO 0, __MIME_TEXT_ONLY 0, __MIME_TEXT_P 0, __MIME_TEXT_P1 0, __MIME_VERSION 0, __MULTIPLE_RCPTS_CC_X2 0, __MULTIPLE_RCPTS_TO_X5 0, __REFERENCES 0, __SANE_MSGID 0, __SUBJ_ALPHA_END 0, __TO_MALFORMED_2 0, __TO_NO_NAME 0, __URI_NO_WWW 0, __URI_NS ' This patch adds driver support for 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 --- .../devicetree/bindings/media/i2c/max2175.txt | 60 + drivers/media/i2c/Kconfig | 4 + drivers/media/i2c/Makefile | 2 + drivers/media/i2c/max2175/Kconfig | 8 + drivers/media/i2c/max2175/Makefile | 4 + drivers/media/i2c/max2175/max2175.c | 1624 ++++++++++++++++++++ drivers/media/i2c/max2175/max2175.h | 124 ++ 7 files changed, 1826 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/max2175.txt create mode 100644 drivers/media/i2c/max2175/Kconfig create mode 100644 drivers/media/i2c/max2175/Makefile create mode 100644 drivers/media/i2c/max2175/max2175.c create mode 100644 drivers/media/i2c/max2175/max2175.h diff --git a/Documentation/devicetree/bindings/media/i2c/max2175.txt b/Documentation/devicetree/bindings/media/i2c/max2175.txt new file mode 100644 index 0000000..2250d5f --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/max2175.txt @@ -0,0 +1,60 @@ +Maxim Integrated MAX2175 RF to Bits tuner +----------------------------------------- + +The MAX2175 IC is an advanced analog/digital hybrid-radio receiver with +RF to Bits® front-end designed for software-defined radio solutions. + +Required properties: +-------------------- +- compatible: "maxim,max2175" for MAX2175 RF-to-bits tuner. +- clocks: phandle to the fixed xtal clock. +- clock-names: name of the fixed xtal clock. +- port: video interface child port node of a tuner that defines the local + and remote endpoints. The remote endpoint is assumed to be an SDR device + that is capable of receiving the digital samples from the tuner. + +Optional properties: +-------------------- +- maxim,slave : empty property indicates this is a slave of another + master tuner. This is used to define two tuners in + diversity mode (1 master, 1 slave). By default each + tuner is an individual master. +- maxim,refout-load: load capacitance value (in pF) on reference output + drive level. The mapping of these load values to + respective bit values are given below. + 0 - Reference output disabled + 1 - 10pF load + 2 - 20pF load + 3 - 30pF load + 4 - 40pF load + 5 - 60pF load + 6 - 70pF load + +Example: +-------- + +Board specific DTS file + +/* Fixed XTAL clock node */ +maxim_xtal: maximextal { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <36864000>; +}; + +/* A tuner device instance under i2c bus */ +max2175_0: tuner@60 { + #clock-cells = <0>; + compatible = "maxim,max2175"; + reg = <0x60>; + clocks = <&maxim_xtal>; + clock-names = "xtal"; + maxim,refout-load = <10>; + + port { + max2175_0_ep: endpoint { + remote-endpoint = <&slave_rx_v4l2_sdr_device>; + }; + }; + +}; diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 2669b4b..66c73b0 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -749,6 +749,10 @@ config VIDEO_SAA6752HS To compile this driver as a module, choose M here: the module will be called saa6752hs. +comment "SDR tuner chips" + +source "drivers/media/i2c/max2175/Kconfig" + comment "Miscellaneous helper chips" config VIDEO_THS7303 diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index 92773b2..cfae721 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -6,6 +6,8 @@ obj-$(CONFIG_VIDEO_CX25840) += cx25840/ obj-$(CONFIG_VIDEO_M5MOLS) += m5mols/ obj-y += soc_camera/ +obj-$(CONFIG_SDR_MAX2175) += max2175/ + obj-$(CONFIG_VIDEO_APTINA_PLL) += aptina-pll.o obj-$(CONFIG_VIDEO_TVAUDIO) += tvaudio.o obj-$(CONFIG_VIDEO_TDA7432) += tda7432.o diff --git a/drivers/media/i2c/max2175/Kconfig b/drivers/media/i2c/max2175/Kconfig new file mode 100644 index 0000000..a8a0664 --- /dev/null +++ b/drivers/media/i2c/max2175/Kconfig @@ -0,0 +1,8 @@ +config SDR_MAX2175 + tristate "Maxim 2175 RF to Bits tuner" + depends on VIDEO_V4L2 && MEDIA_SDR_SUPPORT && I2C && VIDEO_V4L2_SUBDEV_API + ---help--- + Support for Maxim 2175 tuner + + To compile this driver as a module, choose M here; the + module will be called max2175. diff --git a/drivers/media/i2c/max2175/Makefile b/drivers/media/i2c/max2175/Makefile new file mode 100644 index 0000000..9bb46ac --- /dev/null +++ b/drivers/media/i2c/max2175/Makefile @@ -0,0 +1,4 @@ +# +# Makefile for Maxim RF to Bits tuner device +# +obj-$(CONFIG_SDR_MAX2175) += max2175.o diff --git a/drivers/media/i2c/max2175/max2175.c b/drivers/media/i2c/max2175/max2175.c new file mode 100644 index 0000000..71b60c2 --- /dev/null +++ b/drivers/media/i2c/max2175/max2175.c @@ -0,0 +1,1624 @@ +/* + * 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 chip. + * + * Copyright (C) 2016 Maxim Integrated Products + * Copyright (C) 2016 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "max2175.h" + +#define DRIVER_NAME "max2175" + +static unsigned int max2175_debug; +module_param(max2175_debug, uint, 0644); +MODULE_PARM_DESC(max2175_debug, "activate debug info"); + +#define mxm_dbg(ctx, fmt, arg...) \ + v4l2_dbg(1, max2175_debug, &ctx->sd, fmt, ## arg) + +/* NOTE: Any addition/deletion in the below list should be reflected in + * max2175_modetag enum + */ +static const struct max2175_rxmode eu_rx_modes[] = { /* Indexed by EU modetag */ + /* EU modes */ + { MAX2175_BAND_VHF, 182640000, 0, { 0, 0, 0, 0 } }, +}; + +static const struct max2175_rxmode na_rx_modes[] = { /* Indexed by NA modetag */ + /* NA modes */ + { MAX2175_BAND_FM, 98255520, 1, { 0, 0, 0, 0 } }, +}; + +/* Preset values: + * Based on Maxim MAX2175 Register Table revision: 130p10 + */ +static const u8 full_fm_eu_1p0[] = { + 0x15, 0x04, 0xb8, 0xe3, 0x35, 0x18, 0x7c, 0x00, + 0x00, 0x7d, 0x40, 0x08, 0x70, 0x7a, 0x88, 0x91, + 0x61, 0x61, 0x61, 0x61, 0x5a, 0x0f, 0x34, 0x1c, + 0x14, 0x88, 0x33, 0x02, 0x00, 0x09, 0x00, 0x65, + 0x9f, 0x2b, 0x80, 0x00, 0x95, 0x05, 0x2c, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, + 0x4a, 0x08, 0xa8, 0x0e, 0x0e, 0x2f, 0x7e, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0xab, 0x5e, 0xa9, + 0xae, 0xbb, 0x57, 0x18, 0x3b, 0x03, 0x3b, 0x64, + 0x40, 0x60, 0x00, 0x2a, 0xbf, 0x3f, 0xff, 0x9f, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, + 0xff, 0xfc, 0xef, 0x1c, 0x40, 0x00, 0x00, 0x02, + 0x00, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0xac, 0x40, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x00, 0x00, + 0x00, 0x47, 0x00, 0x00, 0x11, 0x3f, 0x22, 0x00, + 0xf1, 0x00, 0x41, 0x03, 0xb0, 0x00, 0x00, 0x00, + 0x1b, +}; + +static const u8 full_fm_na_1p0[] = { + 0x13, 0x08, 0x8d, 0xc0, 0x35, 0x18, 0x7d, 0x3f, + 0x7d, 0x75, 0x40, 0x08, 0x70, 0x7a, 0x88, 0x91, + 0x61, 0x61, 0x61, 0x61, 0x5c, 0x0f, 0x34, 0x1c, + 0x14, 0x88, 0x33, 0x02, 0x00, 0x01, 0x00, 0x65, + 0x9f, 0x2b, 0x80, 0x00, 0x95, 0x05, 0x2c, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, + 0x4a, 0x08, 0xa8, 0x0e, 0x0e, 0xaf, 0x7e, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0xab, 0x5e, 0xa9, + 0xae, 0xbb, 0x57, 0x18, 0x3b, 0x03, 0x3b, 0x64, + 0x40, 0x60, 0x00, 0x2a, 0xbf, 0x3f, 0xff, 0x9f, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, + 0xff, 0xfc, 0xef, 0x1c, 0x40, 0x00, 0x00, 0x02, + 0x00, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0xa6, 0x40, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x00, 0x00, + 0x00, 0x35, 0x00, 0x00, 0x11, 0x3f, 0x22, 0x00, + 0xf1, 0x00, 0x41, 0x03, 0xb0, 0x00, 0x00, 0x00, + 0x1b, +}; + +static const struct max2175_regmap dab12_map[] = { + { 0x01, 0x13 }, { 0x02, 0x0d }, { 0x03, 0x15 }, { 0x04, 0x55 }, + { 0x05, 0x0a }, { 0x06, 0xa0 }, { 0x07, 0x40 }, { 0x08, 0x00 }, + { 0x09, 0x00 }, { 0x0a, 0x7d }, { 0x0b, 0x4a }, { 0x0c, 0x28 }, + { 0x0e, 0x43 }, { 0x0f, 0xb5 }, { 0x10, 0x31 }, { 0x11, 0x9e }, + { 0x12, 0x68 }, { 0x13, 0x9e }, { 0x14, 0x68 }, { 0x15, 0x58 }, + { 0x16, 0x2f }, { 0x17, 0x3f }, { 0x18, 0x40 }, { 0x1a, 0x88 }, + { 0x1b, 0xaa }, { 0x1c, 0x9a }, { 0x1d, 0x00 }, { 0x1e, 0x00 }, + { 0x23, 0x80 }, { 0x24, 0x00 }, { 0x25, 0x00 }, { 0x26, 0x00 }, + { 0x27, 0x00 }, { 0x32, 0x08 }, { 0x33, 0xf8 }, { 0x36, 0x2d }, + { 0x37, 0x7e }, { 0x55, 0xaf }, { 0x56, 0x3f }, { 0x57, 0xf8 }, + { 0x58, 0x99 }, { 0x76, 0x00 }, { 0x77, 0x00 }, { 0x78, 0x02 }, + { 0x79, 0x40 }, { 0x82, 0x00 }, { 0x83, 0x00 }, { 0x85, 0x00 }, + { 0x86, 0x20 }, +}; + +static const u16 ch_coeff_dab1[] = { + 0x001c, 0x0007, 0xffcd, 0x0056, 0xffa4, 0x0033, 0x0027, 0xff61, + 0x010e, 0xfec0, 0x0106, 0xffb8, 0xff1c, 0x023c, 0xfcb2, 0x039b, + 0xfd4e, 0x0055, 0x036a, 0xf7de, 0x0d21, 0xee72, 0x1499, 0x6a51, +}; + +static const u16 ch_coeff_fmeu[] = { + 0x0000, 0xffff, 0x0001, 0x0002, 0xfffa, 0xffff, 0x0015, 0xffec, + 0xffde, 0x0054, 0xfff9, 0xff52, 0x00b8, 0x00a2, 0xfe0a, 0x00af, + 0x02e3, 0xfc14, 0xfe89, 0x089d, 0xfa2e, 0xf30f, 0x25be, 0x4eb6, +}; + +static const u16 eq_coeff_fmeu1_ra02_m6db[] = { + 0x0040, 0xffc6, 0xfffa, 0x002c, 0x000d, 0xff90, 0x0037, 0x006e, + 0xffc0, 0xff5b, 0x006a, 0x00f0, 0xff57, 0xfe94, 0x0112, 0x0252, + 0xfe0c, 0xfc6a, 0x0385, 0x0553, 0xfa49, 0xf789, 0x0b91, 0x1a10, +}; + +static const u16 ch_coeff_fmna[] = { + 0x0001, 0x0003, 0xfffe, 0xfff4, 0x0000, 0x001f, 0x000c, 0xffbc, + 0xffd3, 0x007d, 0x0075, 0xff33, 0xff01, 0x0131, 0x01ef, 0xfe60, + 0xfc7a, 0x020e, 0x0656, 0xfd94, 0xf395, 0x02ab, 0x2857, 0x3d3f, +}; + +static const u16 eq_coeff_fmna1_ra02_m6db[] = { + 0xfff1, 0xffe1, 0xffef, 0x000e, 0x0030, 0x002f, 0xfff6, 0xffa7, + 0xff9d, 0x000a, 0x00a2, 0x00b5, 0xffea, 0xfed9, 0xfec5, 0x003d, + 0x0217, 0x021b, 0xff5a, 0xfc2b, 0xfcbd, 0x02c4, 0x0ac3, 0x0e85, +}; + +static const u8 adc_presets[2][23] = { + { + 0x83, 0x00, 0xCF, 0xB4, 0x0F, 0x2C, 0x0C, 0x49, + 0x00, 0x00, 0x00, 0x8C, 0x02, 0x02, 0x00, 0x04, + 0xEC, 0x82, 0x4B, 0xCC, 0x01, 0x88, 0x0C, + }, + { + 0x83, 0x00, 0xCF, 0xB4, 0x0F, 0x2C, 0x0C, 0x49, + 0x00, 0x00, 0x00, 0x8C, 0x02, 0x20, 0x33, 0x8C, + 0x57, 0xD7, 0x59, 0xB7, 0x65, 0x0E, 0x0C, + }, +}; + +/* Custom controls */ +#define V4L2_CID_MAX2175_I2S_EN (V4L2_CID_USER_MAX217X_BASE + 0x01) +#define V4L2_CID_MAX2175_I2S_MODE (V4L2_CID_USER_MAX217X_BASE + 0x02) +#define V4L2_CID_MAX2175_AM_HIZ (V4L2_CID_USER_MAX217X_BASE + 0x03) +#define V4L2_CID_MAX2175_HSLS (V4L2_CID_USER_MAX217X_BASE + 0x04) +#define V4L2_CID_MAX2175_RX_MODE (V4L2_CID_USER_MAX217X_BASE + 0x05) + +/* Tuner bands */ +static const struct v4l2_frequency_band bands_rf = { + .tuner = 0, + .type = V4L2_TUNER_RF, + .index = 0, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 160000000, + .rangehigh = 240000000, +}; + +struct max2175_ctx { + struct v4l2_subdev sd; + struct i2c_client *client; + struct device *dev; + + /* Cached configuration */ + u8 regs[256]; + enum max2175_modetag mode; /* Receive mode tag */ + u32 freq; /* In Hz */ + struct max2175_rxmode *rx_modes; + + /* Device settings */ + bool master; + u32 decim_ratio; + u64 xtal_freq; + + /* ROM values */ + u8 rom_bbf_bw_am; + u8 rom_bbf_bw_fm; + u8 rom_bbf_bw_dab; + + /* Local copy of old settings */ + u8 i2s_test; + + u8 nbd_gain; + u8 nbd_threshold; + u8 wbd_gain; + u8 wbd_threshold; + u8 bbd_threshold; + u8 bbdclip_threshold; + u8 lt_wbd_threshold; + u8 lt_wbd_gain; + + /* Controls */ + struct v4l2_ctrl_handler ctrl_hdl; + struct v4l2_ctrl *lna_gain; /* LNA gain value */ + struct v4l2_ctrl *if_gain; /* I/F gain value */ + struct v4l2_ctrl *pll_lock; /* PLL lock */ + struct v4l2_ctrl *i2s_en; /* I2S output enable */ + struct v4l2_ctrl *i2s_mode; /* I2S mode value */ + struct v4l2_ctrl *am_hiz; /* AM High impledance input */ + struct v4l2_ctrl *hsls; /* High-side/Low-side polarity */ + struct v4l2_ctrl *rx_mode; /* Receive mode */ + + /* Driver private variables */ + bool mode_resolved; /* Flag to sanity check settings */ +}; + +/* Helpers */ + +static int max2175_reg_write(struct max2175_ctx *ctx, u8 idx, u8 val) +{ + int ret; + + ret = i2c_smbus_write_byte_data(ctx->client, idx, val); + if (ret) { + v4l2_err(ctx->client, + "write: idx 0x%02x, val 0x%02x\n", idx, val); + return ret; + } + + /* Update local store */ + ctx->regs[idx] = val; + if (max2175_debug >= 2) + mxm_dbg(ctx, "write: reg[0x%02x] = 0x%02x\n", idx, val); + + return ret; +} + +static int max2175_reg_read(struct max2175_ctx *ctx, u8 idx) +{ + int ret; + + ret = i2c_smbus_read_byte_data(ctx->client, idx); + if (ret < 0) { + v4l2_err(ctx->client, "read: idx 0x%02x\n", idx); + return ret; + } + + if (max2175_debug >= 2) + mxm_dbg(ctx, "read: reg[0x%02x] = 0x%02x\n", idx, ret); + + return ret; +} + +/* Flush local copy to device from idx to idx+len (inclusive) */ +static void max2175_flush_regstore(struct max2175_ctx *ctx, u8 idx, u8 len) +{ + u8 i; + + for (i = idx; i <= len; i++) + max2175_reg_write(ctx, i, ctx->regs[i]); +} + +/* General bitops helpers */ +static inline u8 __max2175_get_bits(u8 val, u8 msb, u8 lsb) +{ + return ((val & GENMASK(msb, lsb)) >> lsb); +} + +static inline u8 __max2175_set_bits(u8 val, u8 msb, u8 lsb, u8 newval) +{ + u8 mask = GENMASK(msb, lsb); + + return ((val & ~mask) | ((newval << lsb) & mask)); +} + +/* Local store bitops helpers */ +static u8 max2175_get_bits(struct max2175_ctx *ctx, u8 idx, u8 msb, u8 lsb) +{ + if (max2175_debug >= 2) + mxm_dbg(ctx, "get_bits: idx:%u msb:%u lsb:%u\n", + idx, msb, lsb); + return __max2175_get_bits(ctx->regs[idx], msb, lsb); +} + +static bool max2175_get_bit(struct max2175_ctx *ctx, u8 idx, u8 bit) +{ + return !!max2175_get_bits(ctx, idx, bit, bit); +} + +static void max2175_set_bits(struct max2175_ctx *ctx, u8 idx, + u8 msb, u8 lsb, u8 newval) +{ + if (max2175_debug >= 2) + mxm_dbg(ctx, "set_bits: idx:%u msb:%u lsb:%u newval:%u\n", + idx, msb, lsb, newval); + ctx->regs[idx] = __max2175_set_bits(ctx->regs[idx], msb, lsb, + newval); +} + +static void max2175_set_bit(struct max2175_ctx *ctx, u8 idx, u8 bit, u8 newval) +{ + max2175_set_bits(ctx, idx, bit, bit, newval); +} + +/* Device register bitops helpers */ +static u8 max2175_read_bits(struct max2175_ctx *ctx, u8 idx, u8 msb, u8 lsb) +{ + return __max2175_get_bits(max2175_reg_read(ctx, idx), msb, lsb); +} + +static void max2175_write_bits(struct max2175_ctx *ctx, u8 idx, u8 msb, + u8 lsb, u8 newval) +{ + /* Update local copy & write to device */ + max2175_set_bits(ctx, idx, msb, lsb, newval); + max2175_reg_write(ctx, idx, ctx->regs[idx]); +} + +static void max2175_write_bit(struct max2175_ctx *ctx, u8 idx, u8 bit, + u8 newval) +{ + if (max2175_debug >= 2) + mxm_dbg(ctx, "idx %u, bit %u, newval %u\n", idx, bit, newval); + max2175_write_bits(ctx, idx, bit, bit, newval); +} + +static int max2175_poll_timeout(struct max2175_ctx *ctx, u8 idx, u8 msb, u8 lsb, + u8 exp_val, u32 timeout) +{ + unsigned long end = jiffies + msecs_to_jiffies(timeout); + int ret; + + do { + ret = max2175_read_bits(ctx, idx, msb, lsb); + if (ret < 0) + return ret; + if (ret == exp_val) + return 0; + + usleep_range(1000, 1500); + } while (time_is_after_jiffies(end)); + + return -EBUSY; +} + +static int max2175_poll_csm_ready(struct max2175_ctx *ctx) +{ + return max2175_poll_timeout(ctx, 69, 1, 1, 0, 50); +} + +#define MAX2175_IS_BAND_AM(ctx) \ + (max2175_get_bits(ctx, 5, 1, 0) == MAX2175_BAND_AM) + +#define MAX2175_IS_FM_MODE(ctx) \ + (max2175_get_bits(ctx, 12, 5, 4) == 0) + +#define MAX2175_IS_FMHD_MODE(ctx) \ + (max2175_get_bits(ctx, 12, 5, 4) == 1) + +#define MAX2175_IS_DAB_MODE(ctx) \ + (max2175_get_bits(ctx, 12, 5, 4) == 2) + +static int max2175_band_from_freq(u64 freq) +{ + if (freq >= 144000 && freq <= 26100000) + return MAX2175_BAND_AM; + else if (freq >= 65000000 && freq <= 108000000) + return MAX2175_BAND_FM; + else if (freq >= 160000000 && freq <= 240000000) + return MAX2175_BAND_VHF; + + /* Add other bands on need basis */ + return -ENOTSUPP; +} + +static int max2175_update_i2s_mode(struct max2175_ctx *ctx, u32 i2s_mode) +{ + /* Only change if it's new */ + if (max2175_read_bits(ctx, 29, 2, 0) == i2s_mode) + return 0; + + max2175_write_bits(ctx, 29, 2, 0, i2s_mode); + + /* Based on I2S mode value I2S_WORD_CNT values change */ + if (i2s_mode == MAX2175_I2S_MODE3) { + max2175_write_bits(ctx, 30, 6, 0, 1); + } else if (i2s_mode == MAX2175_I2S_MODE2 || + i2s_mode == MAX2175_I2S_MODE4) { + max2175_write_bits(ctx, 30, 6, 0, 0); + } else if (i2s_mode == MAX2175_I2S_MODE0) { + max2175_write_bits(ctx, 30, 6, 0, + ctx->rx_modes[ctx->mode].i2s_word_size); + } else { + v4l2_err(ctx->client, + "failed: i2s_mode %u unsupported\n", i2s_mode); + return 1; + } + mxm_dbg(ctx, "updated i2s_mode %u\n", i2s_mode); + return 0; +} + +static void max2175_i2s_enable(struct max2175_ctx *ctx, bool enable) +{ + if (enable) { + /* Use old setting */ + max2175_write_bits(ctx, 104, 3, 0, ctx->i2s_test); + } else { + /* Cache old setting */ + ctx->i2s_test = max2175_read_bits(ctx, 104, 3, 0); + max2175_write_bits(ctx, 104, 3, 0, 1); + } + mxm_dbg(ctx, "i2s %s: old val %u\n", enable ? "enabled" : "disabled", + ctx->i2s_test); +} + +static void max2175_set_filter_coeffs(struct max2175_ctx *ctx, u8 m_sel, + u8 bank, const u16 *coeffs) +{ + u8 i, coeff_addr, upper_address; + + mxm_dbg(ctx, "start: m_sel %d bank %d\n", m_sel, bank); + max2175_write_bits(ctx, 114, 5, 4, m_sel); + + if (m_sel == 2) + upper_address = 12; + else + upper_address = 24; + + max2175_set_bit(ctx, 117, 7, 1); + for (i = 0; i < upper_address; i++) { + coeff_addr = i + (bank * 24); + max2175_set_bits(ctx, 115, 7, 0, + (u8)((coeffs[i] >> 8) & 0xff)); + max2175_set_bits(ctx, 116, 7, 0, (u8)(coeffs[i] & 0xff)); + max2175_set_bits(ctx, 117, 6, 0, coeff_addr); + max2175_flush_regstore(ctx, 115, 3); + } + max2175_write_bit(ctx, 117, 7, 0); +} + +static void max2175_load_dab_1p2(struct max2175_ctx *ctx) +{ + u32 i; + + /* Master is already set on init */ + for (i = 0; i < ARRAY_SIZE(dab12_map); i++) + max2175_reg_write(ctx, dab12_map[i].idx, dab12_map[i].val); + + /* The default settings assume master */ + if (!ctx->master) + max2175_write_bit(ctx, 30, 7, 1); + + /* Cache i2s_test value at this point */ + ctx->i2s_test = max2175_get_bits(ctx, 104, 3, 0); + ctx->decim_ratio = 1; + + /* Load the Channel Filter Coefficients into channel filter bank #2 */ + max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 2, ch_coeff_dab1); +} + +static void max2175_set_bbfilter(struct max2175_ctx *ctx) +{ + if (MAX2175_IS_BAND_AM(ctx)) { + max2175_write_bits(ctx, 12, 3, 0, ctx->rom_bbf_bw_am); + mxm_dbg(ctx, "max2175_set_bbfilter: AM: rom value = %d\n", + ctx->rom_bbf_bw_am); + } else { + /* FM or DAB mode */ + if (MAX2175_IS_DAB_MODE(ctx)) { + /* DAB mode. Load ROM values */ + max2175_write_bits(ctx, 12, 3, 0, ctx->rom_bbf_bw_dab); + mxm_dbg(ctx, "max2175_set_bbfilter: DAB: rom value = %d\n", + ctx->rom_bbf_bw_dab); + } else { + /* FM or FM HD mode. Load ROM values */ + max2175_write_bits(ctx, 12, 3, 0, ctx->rom_bbf_bw_fm); + mxm_dbg(ctx, "max2175_set_bbfilter: FM: rom value = %d\n", + ctx->rom_bbf_bw_fm); + } + } +} + +static bool max2175_set_csm_mode(struct max2175_ctx *ctx, + enum max2175_csm_mode new_mode) +{ + int ret = max2175_poll_csm_ready(ctx); + + if (ret) { + v4l2_err(ctx->client, "csm not ready: new mode %d\n", new_mode); + return ret; + } + + mxm_dbg(ctx, "set csm mode: new mode %d\n", new_mode); + + max2175_write_bits(ctx, 0, 2, 0, new_mode); + + /* Wait for a fixed settle down time depending on new mode and band */ + switch (new_mode) { + case MAX2175_CSM_MODE_JUMP_FAST_TUNE: + if (MAX2175_IS_BAND_AM(ctx)) { + usleep_range(1250, 1500); /* 1.25ms */ + } else { + if (MAX2175_IS_DAB_MODE(ctx)) + usleep_range(3000, 3500); /* 3ms */ + else + usleep_range(1250, 1500); /* 1.25ms */ + } + break; + + /* Other mode switches can be added in the future if needed */ + default: + break; + } + + ret = max2175_poll_csm_ready(ctx); + if (ret) { + v4l2_err(ctx->client, "csm did not settle: new mode %d\n", + new_mode); + return ret; + } + return ret; +} + +static int max2175_csm_action(struct max2175_ctx *ctx, + enum max2175_csm_mode action) +{ + int ret; + int load_buffer = MAX2175_CSM_MODE_LOAD_TO_BUFFER; + + mxm_dbg(ctx, "csm action: %d\n", action); + + /* Perform one or two CSM mode commands. */ + switch (action) { + case MAX2175_CSM_MODE_NO_ACTION: + /* Take no FSM Action. */ + return 0; + case MAX2175_CSM_MODE_LOAD_TO_BUFFER: + case MAX2175_CSM_MODE_PRESET_TUNE: + case MAX2175_CSM_MODE_SEARCH: + case MAX2175_CSM_MODE_AF_UPDATE: + case MAX2175_CSM_MODE_JUMP_FAST_TUNE: + case MAX2175_CSM_MODE_CHECK: + case MAX2175_CSM_MODE_LOAD_AND_SWAP: + case MAX2175_CSM_MODE_END: + ret = max2175_set_csm_mode(ctx, action); + break; + case MAX2175_CSM_MODE_BUFFER_PLUS_PRESET_TUNE: + ret = max2175_set_csm_mode(ctx, load_buffer); + if (ret) { + v4l2_err(ctx->client, "csm action %d load buf failed\n", + action); + break; + } + ret = max2175_set_csm_mode(ctx, MAX2175_CSM_MODE_PRESET_TUNE); + break; + case MAX2175_CSM_MODE_BUFFER_PLUS_SEARCH: + ret = max2175_set_csm_mode(ctx, load_buffer); + if (ret) { + v4l2_err(ctx->client, "csm action %d load buf failed\n", + action); + break; + } + ret = max2175_set_csm_mode(ctx, MAX2175_CSM_MODE_SEARCH); + break; + case MAX2175_CSM_MODE_BUFFER_PLUS_AF_UPDATE: + ret = max2175_set_csm_mode(ctx, load_buffer); + if (ret) { + v4l2_err(ctx->client, "csm action %d load buf failed\n", + action); + break; + } + ret = max2175_set_csm_mode(ctx, MAX2175_CSM_MODE_AF_UPDATE); + break; + case MAX2175_CSM_MODE_BUFFER_PLUS_JUMP_FAST_TUNE: + ret = max2175_set_csm_mode(ctx, load_buffer); + if (ret) { + v4l2_err(ctx->client, "csm action %d load buf failed\n", + action); + break; + } + ret = max2175_set_csm_mode(ctx, + MAX2175_CSM_MODE_JUMP_FAST_TUNE); + break; + case MAX2175_CSM_MODE_BUFFER_PLUS_CHECK: + ret = max2175_set_csm_mode(ctx, load_buffer); + if (ret) { + v4l2_err(ctx->client, "csm action %d load buf failed\n", + action); + break; + } + ret = max2175_set_csm_mode(ctx, MAX2175_CSM_MODE_CHECK); + break; + case MAX2175_CSM_MODE_BUFFER_PLUS_LOAD_AND_SWAP: + ret = max2175_set_csm_mode(ctx, load_buffer); + if (ret) { + v4l2_err(ctx->client, "csm action %d load buf failed\n", + action); + break; + } + ret = max2175_set_csm_mode(ctx, MAX2175_CSM_MODE_LOAD_AND_SWAP); + break; + default: + ret = max2175_set_csm_mode(ctx, MAX2175_CSM_MODE_NO_ACTION); + break; + } + return ret; +} + +static int max2175_set_lo_freq(struct max2175_ctx *ctx, u64 lo_freq) +{ + int ret; + u32 lo_mult; + u64 scaled_lo_freq; + const u64 scale_factor = 1000000ULL; + u64 scaled_npf, scaled_integer, scaled_fraction; + u32 frac_desired, int_desired; + u8 loband_bits, vcodiv_bits; + + scaled_lo_freq = lo_freq; + /* Scale to larger number for precision */ + scaled_lo_freq = scaled_lo_freq * scale_factor * 100; + + mxm_dbg(ctx, "scaled lo_freq %llu lo_freq %llu\n", + scaled_lo_freq, lo_freq); + + if (MAX2175_IS_BAND_AM(ctx)) { + if (max2175_get_bit(ctx, 5, 7) == 0) + loband_bits = 0; + vcodiv_bits = 0; + lo_mult = 16; + } else if (max2175_get_bits(ctx, 5, 1, 0) == MAX2175_BAND_FM) { + if (lo_freq <= 74700000) { + loband_bits = 0; + vcodiv_bits = 0; + lo_mult = 16; + } else if ((lo_freq > 74700000) && (lo_freq <= 110000000)) { + loband_bits = 1; + vcodiv_bits = 0; + } else { + loband_bits = 1; + vcodiv_bits = 3; + } + lo_mult = 8; + } else if (max2175_get_bits(ctx, 5, 1, 0) == MAX2175_BAND_VHF) { + if (lo_freq <= 210000000) { + loband_bits = 2; + vcodiv_bits = 2; + } else { + loband_bits = 2; + vcodiv_bits = 1; + } + lo_mult = 4; + } else { + loband_bits = 3; + vcodiv_bits = 2; + lo_mult = 2; + } + + if (max2175_get_bits(ctx, 5, 1, 0) == MAX2175_BAND_L) + scaled_npf = (scaled_lo_freq / ctx->xtal_freq / lo_mult) / 100; + else + scaled_npf = (scaled_lo_freq / ctx->xtal_freq * lo_mult) / 100; + + scaled_integer = scaled_npf / scale_factor * scale_factor; + int_desired = (u32)(scaled_npf / scale_factor); + scaled_fraction = scaled_npf - scaled_integer; + frac_desired = (u32)(scaled_fraction * 1048576 / scale_factor); + + /* Check CSM is not busy */ + ret = max2175_poll_csm_ready(ctx); + if (ret) { + v4l2_err(ctx->client, "lo_freq: csm busy. freq %llu\n", + lo_freq); + return ret; + } + + mxm_dbg(ctx, "loband %u vcodiv %u lo_mult %u scaled_npf %llu\n", + loband_bits, vcodiv_bits, lo_mult, scaled_npf); + mxm_dbg(ctx, "scaled int %llu frac %llu desired int %u frac %u\n", + scaled_integer, scaled_fraction, int_desired, frac_desired); + + /* Write the calculated values to the appropriate registers */ + max2175_set_bits(ctx, 5, 3, 2, loband_bits); + max2175_set_bits(ctx, 6, 7, 6, vcodiv_bits); + max2175_set_bits(ctx, 1, 7, 0, (u8)(int_desired & 0xff)); + max2175_set_bits(ctx, 2, 3, 0, (u8)((frac_desired >> 16) & 0x1f)); + max2175_set_bits(ctx, 3, 7, 0, (u8)((frac_desired >> 8) & 0xff)); + max2175_set_bits(ctx, 4, 7, 0, (u8)(frac_desired & 0xff)); + /* Flush the above registers to device */ + max2175_flush_regstore(ctx, 1, 6); + return ret; +} + +static int max2175_set_nco_freq(struct max2175_ctx *ctx, s64 nco_freq_desired) +{ + int ret; + u64 clock_rate, abs_nco_freq; + s64 nco_freq, nco_val_desired; + u32 nco_reg; + const u64 scale_factor = 1000000ULL; + + mxm_dbg(ctx, "nco_freq: freq = %lld\n", nco_freq_desired); + clock_rate = ctx->xtal_freq / ctx->decim_ratio; + nco_freq = -nco_freq_desired; + + if (nco_freq < 0) + abs_nco_freq = -nco_freq; + else + abs_nco_freq = nco_freq; + + /* Scale up the values for precision */ + if (abs_nco_freq < (clock_rate / 2)) { + nco_val_desired = (2 * nco_freq * scale_factor) / clock_rate; + } else { + if (nco_freq < 0) + nco_val_desired = (-2 * (clock_rate - abs_nco_freq) * + scale_factor) / clock_rate; + else + nco_val_desired = (2 * (clock_rate - abs_nco_freq) * + scale_factor) / clock_rate; + } + + /* Scale down to get the fraction */ + if (nco_freq < 0) + nco_reg = 0x200000 + ((nco_val_desired * 1048576) / + scale_factor); + else + nco_reg = (nco_val_desired * 1048576) / scale_factor; + + /* Check CSM is not busy */ + ret = max2175_poll_csm_ready(ctx); + if (ret) { + v4l2_err(ctx->client, "nco_freq: csm busy. freq %llu\n", + nco_freq); + return ret; + } + + mxm_dbg(ctx, "clk %llu decim %u abs %llu desired %lld reg %u\n", + clock_rate, ctx->decim_ratio, abs_nco_freq, + nco_val_desired, nco_reg); + + /* Write the calculated values to the appropriate registers */ + max2175_set_bits(ctx, 7, 4, 0, (u8)((nco_reg >> 16) & 0x1f)); + max2175_set_bits(ctx, 8, 7, 0, (u8)((nco_reg >> 8) & 0xff)); + max2175_set_bits(ctx, 9, 7, 0, (u8)(nco_reg & 0xff)); + max2175_flush_regstore(ctx, 7, 3); /* Send all 3 NCO registers. */ + return ret; +} + +static int max2175_set_rf_freq_non_am_bands(struct max2175_ctx *ctx, u64 freq, + u32 lo_pos) +{ + int ret; + s64 adj_freq; + u64 low_if_freq; + + mxm_dbg(ctx, "rf_freq: non AM bands\n"); + + if (MAX2175_IS_FM_MODE(ctx)) + low_if_freq = 128000; + else if (MAX2175_IS_FMHD_MODE(ctx)) + low_if_freq = 228000; + else + return max2175_set_lo_freq(ctx, freq); + + if (max2175_get_bits(ctx, 5, 1, 0) == MAX2175_BAND_VHF) { + if (lo_pos == MAX2175_LO_ABOVE_DESIRED) + adj_freq = freq + low_if_freq; + else + adj_freq = freq - low_if_freq; + } else { + if (lo_pos == MAX2175_LO_ABOVE_DESIRED) + adj_freq = freq - low_if_freq; + else + adj_freq = freq + low_if_freq; + } + + ret = max2175_set_lo_freq(ctx, adj_freq); + if (ret) + return ret; + + return max2175_set_nco_freq(ctx, low_if_freq); +} + +static int max2175_set_rf_freq(struct max2175_ctx *ctx, u64 freq, u32 lo_pos) +{ + int ret; + + if (MAX2175_IS_BAND_AM(ctx)) + ret = max2175_set_nco_freq(ctx, freq); + else + ret = max2175_set_rf_freq_non_am_bands(ctx, freq, lo_pos); + + if (!ret) + mxm_dbg(ctx, "set rf_freq: freq = %llu. done\n", freq); + + return ret; +} + +static int max2175_tune_rf_freq(struct max2175_ctx *ctx, u64 freq, u32 hsls) +{ + int ret; + + ret = max2175_set_rf_freq(ctx, freq, hsls); + if (ret) + return ret; + + ret = max2175_csm_action(ctx, + MAX2175_CSM_MODE_BUFFER_PLUS_JUMP_FAST_TUNE); + if (ret) + return ret; + + mxm_dbg(ctx, "tuned rf_freq: old %u new %llu\n", ctx->freq, freq); + ctx->freq = freq; + return ret; +} + +static void max2175_set_hsls(struct max2175_ctx *ctx, u32 lo_pos) +{ + mxm_dbg(ctx, "set_hsls: lo_pos = %u\n", lo_pos); + + if (lo_pos == MAX2175_LO_BELOW_DESIRED) { + if (max2175_get_bits(ctx, 5, 1, 0) == MAX2175_BAND_VHF) + max2175_write_bit(ctx, 5, 4, 1); + else + max2175_write_bit(ctx, 5, 4, 0); + } else { + if (max2175_get_bits(ctx, 5, 1, 0) == MAX2175_BAND_VHF) + max2175_write_bit(ctx, 5, 4, 0); + else + max2175_write_bit(ctx, 5, 4, 1); + } +} + +static int max2175_set_rx_mode(struct max2175_ctx *ctx, u32 rx_mode, + u32 am_hiz, u32 hsls) +{ + mxm_dbg(ctx, "receive mode: %u am_hiz %u\n", rx_mode, am_hiz); + + switch (rx_mode) { + case MAX2175_DAB_1_2: + max2175_load_dab_1p2(ctx); + break; + + /* Other modes can be added in future if needed */ + default: + v4l2_err(ctx->client, "invalid rx_mode %u\n", rx_mode); + return -EINVAL; + } + + if (am_hiz) { + mxm_dbg(ctx, "setting AM HiZ related config\n"); + max2175_write_bit(ctx, 50, 5, 1); + max2175_write_bit(ctx, 90, 7, 1); + max2175_write_bits(ctx, 73, 1, 0, 2); + max2175_write_bits(ctx, 80, 5, 0, 33); + } + + /* Store some of the initial values loaded, which will be needed at + * a later stage + */ + ctx->nbd_threshold = max2175_get_bits(ctx, 14, 7, 4); + ctx->nbd_gain = max2175_get_bits(ctx, 16, 7, 5); + ctx->wbd_threshold = max2175_get_bits(ctx, 14, 3, 0); + ctx->wbd_gain = max2175_get_bits(ctx, 15, 5, 4); + ctx->bbd_threshold = max2175_get_bits(ctx, 15, 3, 0); + ctx->bbdclip_threshold = max2175_get_bits(ctx, 35, 7, 5); + ctx->lt_wbd_threshold = max2175_get_bits(ctx, 32, 3, 0); + ctx->lt_wbd_gain = max2175_get_bits(ctx, 32, 5, 4); + + /* Load BB filter trim values saved in ROM */ + max2175_set_bbfilter(ctx); + + /* Set HSLS */ + max2175_set_hsls(ctx, hsls); + + ctx->mode = rx_mode; + ctx->mode_resolved = true; + return 0; +} + +static bool max2175_is_i2s_rx_mode_valid(struct max2175_ctx *ctx, + u32 mode, u32 i2s_mode) +{ + u32 i; + + for (i = 0; i < ARRAY_SIZE(ctx->rx_modes[mode].i2s_modes); i++) + if (ctx->rx_modes[mode].i2s_modes[i] == i2s_mode) + return true; + + v4l2_err(ctx->client, "i2s_mode %u not suitable for rx mode %u\n", + i2s_mode, mode); + return false; +} + +static int max2175_mode_from_freq(struct max2175_ctx *ctx, u32 freq, u32 *mode) +{ + u32 i; + int band; + + band = max2175_band_from_freq(freq); + if (band < 0) { + v4l2_err(ctx->client, "mode from freq failed: %u ret %d\n", + freq, band); + return 1; + } + + /* Pick the first match always */ + for (i = 0; i <= ctx->rx_mode->maximum; i++) { + if (ctx->rx_modes[i].band == band) { + *mode = i; + mxm_dbg(ctx, "mode from freq: freq %u mode %d\n", + freq, *mode); + return 0; + } + } + v4l2_err(ctx->client, "mode from freq failed: freq %u\n", freq); + return 1; +} + +static bool max2175_is_freq_rx_mode_valid(struct max2175_ctx *ctx, + u32 mode, u32 freq) +{ + int band; + + band = max2175_band_from_freq(freq); + if (band < 0) { + v4l2_err(ctx->client, "freq rx mode failed: freq %u ret %d\n", + freq, band); + return band; + } + + mxm_dbg(ctx, "freq rx mode valid: freq %u mode %u\n", freq, mode); + return (ctx->rx_modes[mode].band == band); +} + +static void max2175_load_adc_presets(struct max2175_ctx *ctx) +{ + u32 i; + + for (i = 0; i < 2; i++) { + memcpy(&ctx->regs[146 + (i * 55)], &adc_presets[i][0], 23); + max2175_flush_regstore(ctx, 146 + (i * 55), 23); + } +} + +static int max2175_init_power_manager(struct max2175_ctx *ctx) +{ + int ret; + + /* Execute on-chip power-up/calibration */ + max2175_write_bit(ctx, 99, 2, 0); + usleep_range(1000, 1500); + max2175_write_bit(ctx, 99, 2, 1); + + /* Wait for the power manager to finish. */ + ret = max2175_poll_timeout(ctx, 69, 7, 7, 1, 50); + if (ret) + v4l2_err(ctx->client, "init pm failed\n"); + return ret; +} + +static int max2175_recalibrate_adc(struct max2175_ctx *ctx) +{ + int ret; + + /* ADC Re-calibration */ + max2175_reg_write(ctx, 150, 0xff); + max2175_reg_write(ctx, 205, 0xff); + max2175_reg_write(ctx, 147, 0x20); + max2175_reg_write(ctx, 147, 0x00); + max2175_reg_write(ctx, 202, 0x20); + max2175_reg_write(ctx, 202, 0x00); + + ret = max2175_poll_timeout(ctx, 69, 4, 3, 3, 50); + if (ret) + v4l2_err(ctx->client, "adc recalibration failed\n"); + return ret; +} + +static u8 max2175_read_rom(struct max2175_ctx *ctx, u8 row) +{ + u8 data; + + max2175_write_bit(ctx, 56, 4, 0); + max2175_write_bits(ctx, 56, 3, 0, row); + usleep_range(2000, 2500); + + data = max2175_reg_read(ctx, 58); + max2175_write_bits(ctx, 56, 3, 0, 0); + + mxm_dbg(ctx, "read rom: row 0x%02x, data 0x%02x\n", row, data); + return data; +} + +static void max2175_load_from_rom(struct max2175_ctx *ctx) +{ + u8 data = 0; + + data = max2175_read_rom(ctx, 0); + ctx->rom_bbf_bw_am = (data & 0x0f); + max2175_write_bits(ctx, 81, 3, 0, (data >> 4) & 0xf); + + data = max2175_read_rom(ctx, 1); + ctx->rom_bbf_bw_fm = (data & 0x0f); + ctx->rom_bbf_bw_dab = (data & 0xf0) >> 4; + + data = max2175_read_rom(ctx, 2); + max2175_write_bits(ctx, 82, 4, 0, data & 0x1f); + max2175_write_bits(ctx, 82, 7, 5, data >> 5); + + data = max2175_read_rom(ctx, 3); + if (ctx->am_hiz->val) { + data &= 0x0f; + data |= (max2175_read_rom(ctx, 7) & 0x40) >> 2; + if (!data) + data |= 2; + } else { + data = (data & 0xf0) >> 4; + data |= (max2175_read_rom(ctx, 7) & 0x80) >> 3; + if (!data) + data |= 30; + } + max2175_write_bits(ctx, 80, 5, 0, data + 31); + + data = max2175_read_rom(ctx, 6); + max2175_write_bits(ctx, 81, 7, 6, data >> 6); +} + +static void max2175_load_fm_eu_1p0_full(struct max2175_ctx *ctx) +{ + memcpy(&ctx->regs[1], full_fm_eu_1p0, sizeof(full_fm_eu_1p0)); + ctx->decim_ratio = 36; +} + +static void max2175_load_fm_na_1p0_full(struct max2175_ctx *ctx) +{ + memcpy(&ctx->regs[1], full_fm_na_1p0, sizeof(full_fm_na_1p0)); + ctx->decim_ratio = 27; +} + +static int max2175_core_init(struct max2175_ctx *ctx, u32 refout_bits) +{ + int ret; + + /* MAX2175 uses 36.864MHz clock for EU & 40.154MHz for NA region */ + if (ctx->xtal_freq == MAX2175_EU_XTAL_FREQ) + max2175_load_fm_eu_1p0_full(ctx); + else + max2175_load_fm_na_1p0_full(ctx); + + /* The default settings assume master */ + if (!ctx->master) + max2175_set_bit(ctx, 30, 7, 1); + + mxm_dbg(ctx, "refout_bits %u\n", refout_bits); + /* Set REFOUT */ + max2175_set_bits(ctx, 56, 7, 5, refout_bits); + + /* Send out all the registers to device except register 0 */ + max2175_flush_regstore(ctx, 1, 145); + usleep_range(5000, 5500); + + /* ADC Reset */ + max2175_write_bit(ctx, 99, 1, 0); + usleep_range(1000, 1500); + max2175_write_bit(ctx, 99, 1, 1); + + /* Load ADC preset values */ + max2175_load_adc_presets(ctx); + + /* Initialize the power management state machine */ + ret = max2175_init_power_manager(ctx); + if (ret) + return ret; + mxm_dbg(ctx, "init pm done\n"); + + /* Recalibrate ADC */ + ret = max2175_recalibrate_adc(ctx); + if (ret) + return ret; + mxm_dbg(ctx, "adc recalibration done\n"); + + /* Load ROM values to appropriate registers */ + max2175_load_from_rom(ctx); + + if (ctx->xtal_freq == MAX2175_EU_XTAL_FREQ) { + /* Load FIR coefficients into bank 0 */ + max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 0, + ch_coeff_fmeu); + max2175_set_filter_coeffs(ctx, MAX2175_EQ_MSEL, 0, + eq_coeff_fmeu1_ra02_m6db); + } else { + /* Load FIR coefficients into bank 0 */ + max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 0, + ch_coeff_fmna); + max2175_set_filter_coeffs(ctx, MAX2175_EQ_MSEL, 0, + eq_coeff_fmna1_ra02_m6db); + } + mxm_dbg(ctx, "core initialized\n"); + return 0; +} + +#define max2175_ctx_from_sd(x) \ + container_of(x, struct max2175_ctx, sd) +#define max2175_ctx_from_ctrl(x) \ + container_of(x, struct max2175_ctx, ctrl_hdl) + +static void max2175_s_ctrl_i2s_mode(struct max2175_ctx *ctx, u32 i2s_mode) +{ + mxm_dbg(ctx, "s_ctrl_i2s_mode: %u resolved %d\n", i2s_mode, + ctx->mode_resolved); + + /* Update i2s mode on device only when mode is resolved & it is valid + * for the configured mode + */ + if (ctx->mode_resolved && + max2175_is_i2s_rx_mode_valid(ctx, ctx->mode, i2s_mode)) + max2175_update_i2s_mode(ctx, i2s_mode); +} + +static void max2175_s_ctrl_rx_mode(struct max2175_ctx *ctx, u32 rx_mode) +{ + int ret; + + /* Load mode. Range check already done */ + ret = max2175_set_rx_mode(ctx, rx_mode, + ctx->am_hiz->val, ctx->hsls->val); + if (ret) + return; + + /* Get current i2s_mode and update if needed for given rx_mode */ + if (max2175_is_i2s_rx_mode_valid(ctx, rx_mode, ctx->i2s_mode->val)) + max2175_update_i2s_mode(ctx, ctx->i2s_mode->val); + else + ctx->i2s_mode->val = max2175_read_bits(ctx, 29, 2, 0); + + mxm_dbg(ctx, "s_ctrl_rx_mode: %u curr freq %u\n", rx_mode, ctx->freq); + /* Check if current freq valid for mode & update */ + if (max2175_is_freq_rx_mode_valid(ctx, rx_mode, ctx->freq)) + max2175_tune_rf_freq(ctx, ctx->freq, ctx->hsls->val); + else + /* Use default freq of mode if current freq is not valid */ + max2175_tune_rf_freq(ctx, ctx->rx_modes[rx_mode].freq, + ctx->hsls->val); +} + +static int max2175_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct max2175_ctx *ctx = max2175_ctx_from_ctrl(ctrl->handler); + int ret = 0; + + mxm_dbg(ctx, "s_ctrl: id 0x%x, val %u\n", ctrl->id, ctrl->val); + switch (ctrl->id) { + case V4L2_CID_MAX2175_I2S_EN: + max2175_i2s_enable(ctx, ctrl->val == 1); + break; + case V4L2_CID_MAX2175_I2S_MODE: + max2175_s_ctrl_i2s_mode(ctx, ctrl->val); + break; + case V4L2_CID_MAX2175_AM_HIZ: + v4l2_ctrl_activate(ctx->am_hiz, false); + break; + case V4L2_CID_MAX2175_HSLS: + v4l2_ctrl_activate(ctx->hsls, false); + break; + case V4L2_CID_MAX2175_RX_MODE: + mxm_dbg(ctx, "rx mode %u\n", ctrl->val); + max2175_s_ctrl_rx_mode(ctx, ctrl->val); + break; + default: + v4l2_err(ctx->client, "s:invalid ctrl id 0x%x\n", ctrl->id); + ret = -EINVAL; + } + + return ret; +} + +static int max2175_get_lna_gain(struct max2175_ctx *ctx) +{ + int gain = 0; + enum max2175_band band = max2175_get_bits(ctx, 5, 1, 0); + + switch (band) { + case MAX2175_BAND_AM: + gain = max2175_read_bits(ctx, 51, 3, 1); + break; + case MAX2175_BAND_FM: + gain = max2175_read_bits(ctx, 50, 3, 1); + break; + case MAX2175_BAND_VHF: + gain = max2175_read_bits(ctx, 52, 3, 0); + break; + default: + v4l2_err(ctx->client, "invalid band %d to get rf gain\n", band); + break; + } + return gain; +} + +static int max2175_g_volatile_ctrl(struct v4l2_ctrl *ctrl) +{ + struct max2175_ctx *ctx = max2175_ctx_from_ctrl(ctrl->handler); + + /* Only the dynamically changing values need to be in g_volatile_ctrl */ + mxm_dbg(ctx, "g_volatile_ctrl: id 0x%x\n", ctrl->id); + switch (ctrl->id) { + case V4L2_CID_RF_TUNER_LNA_GAIN: + ctrl->val = max2175_get_lna_gain(ctx); + break; + case V4L2_CID_RF_TUNER_IF_GAIN: + ctrl->val = max2175_read_bits(ctx, 49, 4, 0); + break; + case V4L2_CID_RF_TUNER_PLL_LOCK: + ctrl->val = (max2175_read_bits(ctx, 60, 7, 6) == 3); + break; + default: + v4l2_err(ctx->client, "g:invalid ctrl id 0x%x\n", ctrl->id); + return -EINVAL; + } + mxm_dbg(ctx, "g_volatile_ctrl: id 0x%x val %d\n", ctrl->id, ctrl->val); + return 0; +}; + +static int max2175_set_freq_and_mode(struct max2175_ctx *ctx, u32 freq) +{ + u32 rx_mode; + int ret; + + /* Get band from frequency */ + ret = max2175_mode_from_freq(ctx, freq, &rx_mode); + if (ret) { + v4l2_err(ctx->client, "set freq mode failed: freq %u ret %d\n", + freq, ret); + return ret; + } + mxm_dbg(ctx, "set_freq_and_mode: freq %u rx_mode %d\n", freq, rx_mode); + + /* Load mode */ + ret = max2175_set_rx_mode(ctx, rx_mode, ctx->am_hiz->val, + ctx->hsls->val); + if (ret) + return ret; + + /* Get current i2s_mode and update if needed for given rx_mode */ + if (max2175_is_i2s_rx_mode_valid(ctx, rx_mode, ctx->i2s_mode->val)) + max2175_update_i2s_mode(ctx, ctx->i2s_mode->val); + else + v4l2_ctrl_s_ctrl(ctx->i2s_mode, + max2175_read_bits(ctx, 29, 2, 0)); + + /* Tune to the new freq given */ + return max2175_tune_rf_freq(ctx, freq, ctx->hsls->val); +} + +static int max2175_s_frequency(struct v4l2_subdev *sd, + const struct v4l2_frequency *vf) +{ + struct max2175_ctx *ctx = max2175_ctx_from_sd(sd); + u32 freq; + int ret = 0; + + mxm_dbg(ctx, "s_freq: tuner %u type %u freq: new %u, curr %u\n", + vf->tuner, vf->type, vf->frequency, ctx->freq); + + if (vf->tuner != 0) { + v4l2_err(ctx->client, "s_freq: invalid tuner %u\n", vf->tuner); + return -EINVAL; + } + /* RF freq */ + freq = clamp(vf->frequency, bands_rf.rangelow, bands_rf.rangehigh); + if (ctx->mode_resolved) + /* Check new freq valid for mode */ + if (max2175_is_freq_rx_mode_valid(ctx, ctx->mode, freq)) + ret = max2175_tune_rf_freq(ctx, freq, ctx->hsls->val); + else + /* Find default mode for freq and tune to it */ + ret = max2175_set_freq_and_mode(ctx, freq); + else + ret = max2175_set_freq_and_mode(ctx, freq); + + mxm_dbg(ctx, "s_freq: ret %d mode %d freq: curr %u\n", + ret, ctx->mode, ctx->freq); + return ret; +} + +static int max2175_g_frequency(struct v4l2_subdev *sd, + struct v4l2_frequency *vf) +{ + struct max2175_ctx *ctx = max2175_ctx_from_sd(sd); + int ret = 0; + + if (vf->tuner != 0) { + v4l2_err(ctx->client, "g_freq: invalid tuner %u\n", vf->tuner); + return -EINVAL; + } + + /* RF freq */ + vf->type = V4L2_TUNER_RF; + vf->frequency = ctx->freq; + mxm_dbg(ctx, "g_freq: ret %d tuner %u, type %u, vf %u\n", + ret, vf->tuner, vf->type, vf->frequency); + + return ret; +} + +static int max2175_enum_freq_bands(struct v4l2_subdev *sd, + struct v4l2_frequency_band *band) +{ + struct max2175_ctx *ctx = max2175_ctx_from_sd(sd); + int ret = 0; + + if (band->tuner == 0 && band->index == 0) + *band = bands_rf; + else + ret = -EINVAL; + + mxm_dbg(ctx, + "enum_freq: ret %d tuner %u type %u index %u low %u high %u\n", + ret, band->tuner, band->type, band->index, band->rangelow, + band->rangehigh); + return ret; +} + +static int max2175_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) +{ + if (vt->index > 0) + return -EINVAL; + + strlcpy(vt->name, "RF", sizeof(vt->name)); + vt->type = V4L2_TUNER_RF; + vt->capability = + V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; + vt->rangelow = bands_rf.rangelow; + vt->rangehigh = bands_rf.rangehigh; + return 0; +} + +static int max2175_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt) +{ + /* Check tuner index is valid */ + if (vt->index > 0) + return -EINVAL; + + return 0; +} + +static const struct v4l2_subdev_tuner_ops max2175_tuner_ops = { + .s_frequency = max2175_s_frequency, + .g_frequency = max2175_g_frequency, + .enum_freq_bands = max2175_enum_freq_bands, + .g_tuner = max2175_g_tuner, + .s_tuner = max2175_s_tuner, +}; + +static const struct v4l2_subdev_ops max2175_ops = { + .tuner = &max2175_tuner_ops, +}; + +static const struct v4l2_ctrl_ops max2175_ctrl_ops = { + .s_ctrl = max2175_s_ctrl, + .g_volatile_ctrl = max2175_g_volatile_ctrl, +}; + +static const struct v4l2_ctrl_config max2175_i2s_en = { + .ops = &max2175_ctrl_ops, + .id = V4L2_CID_MAX2175_I2S_EN, + .name = "I2S Enable", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .min = 0, + .max = 1, + .step = 1, + .def = 1, +}; + +static const struct v4l2_ctrl_config max2175_i2s_mode = { + .ops = &max2175_ctrl_ops, + .id = V4L2_CID_MAX2175_I2S_MODE, + .name = "I2S_MODE value", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = 0, + .max = 4, + .step = 1, + .def = 0, +}; + +static const struct v4l2_ctrl_config max2175_am_hiz = { + .ops = &max2175_ctrl_ops, + .id = V4L2_CID_MAX2175_AM_HIZ, + .name = "AM High impedance input", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .min = 0, + .max = 1, + .step = 1, + .def = 0, +}; + +static const struct v4l2_ctrl_config max2175_hsls = { + .ops = &max2175_ctrl_ops, + .id = V4L2_CID_MAX2175_HSLS, + .name = "HSLS above/below desired", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = 0, + .max = 1, + .step = 1, + .def = 1, +}; + + +/* NOTE: Any addition/deletion in the below list should be reflected in + * max2175_modetag enum + */ +static const char * const max2175_ctrl_eu_rx_mode_strings[] = { + "DAB 1.2", + "NULL", +}; + +static const char * const max2175_ctrl_na_rx_mode_strings[] = { + "NA FM 1.0", + "NULL", +}; + +static const struct v4l2_ctrl_config max2175_eu_rx_mode = { + .ops = &max2175_ctrl_ops, + .id = V4L2_CID_MAX2175_RX_MODE, + .name = "RX MODE", + .type = V4L2_CTRL_TYPE_MENU, + .max = ARRAY_SIZE(max2175_ctrl_eu_rx_mode_strings) - 2, + .def = 0, + .qmenu = max2175_ctrl_eu_rx_mode_strings, +}; + +static const struct v4l2_ctrl_config max2175_na_rx_mode = { + .ops = &max2175_ctrl_ops, + .id = V4L2_CID_MAX2175_RX_MODE, + .name = "RX MODE", + .type = V4L2_CTRL_TYPE_MENU, + .max = ARRAY_SIZE(max2175_ctrl_na_rx_mode_strings) - 2, + .def = 0, + .qmenu = max2175_ctrl_na_rx_mode_strings, +}; + +static u32 max2175_refout_load_to_bits(struct i2c_client *client, u32 load) +{ + u32 bits = 0; /* REFOUT disabled */ + + if (load >= 0 && load <= 40) + bits = load / 10; + else if (load >= 60 && load <= 70) + bits = load / 10 - 1; + else + dev_warn(&client->dev, "invalid refout_load %u\n", load); + + return bits; +} + +static int max2175_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct max2175_ctx *ctx; + struct device *dev = &client->dev; + struct v4l2_subdev *sd; + struct v4l2_ctrl_handler *hdl; + struct clk *clk; + bool master = true; + u32 refout_load, refout_bits = 0; /* REFOUT disabled */ + int ret; + + /* Check if the adapter supports the needed features */ + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "i2c check failed\n"); + return -EIO; + } + + if (of_find_property(client->dev.of_node, "maxim,slave", NULL)) + master = false; + + if (!of_property_read_u32(client->dev.of_node, "maxim,refout-load", + &refout_load)) + refout_bits = max2175_refout_load_to_bits(client, refout_load); + + clk = devm_clk_get(&client->dev, "xtal"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&client->dev, "cannot get xtal clock %d\n", ret); + return -ENODEV; + } + + ctx = kzalloc(sizeof(struct max2175_ctx), + GFP_KERNEL); + if (ctx == NULL) + return -ENOMEM; + + sd = &ctx->sd; + ctx->master = master; + ctx->mode_resolved = false; + + /* Set the defaults */ + ctx->freq = bands_rf.rangelow; + + ctx->xtal_freq = clk_get_rate(clk); + dev_info(&client->dev, "xtal freq %lluHz\n", ctx->xtal_freq); + + v4l2_i2c_subdev_init(sd, client, &max2175_ops); + ctx->client = client; + + sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE; + ctx->dev = dev; + + /* Controls */ + hdl = &ctx->ctrl_hdl; + ret = v4l2_ctrl_handler_init(hdl, 8); + if (ret) { + dev_err(&client->dev, "ctrl handler init failed\n"); + goto err; + } + + ctx->lna_gain = v4l2_ctrl_new_std(hdl, &max2175_ctrl_ops, + V4L2_CID_RF_TUNER_LNA_GAIN, + 0, 15, 1, 2); + ctx->lna_gain->flags |= (V4L2_CTRL_FLAG_VOLATILE | + V4L2_CTRL_FLAG_READ_ONLY); + ctx->if_gain = v4l2_ctrl_new_std(hdl, &max2175_ctrl_ops, + V4L2_CID_RF_TUNER_IF_GAIN, + 0, 31, 1, 0); + ctx->if_gain->flags |= (V4L2_CTRL_FLAG_VOLATILE | + V4L2_CTRL_FLAG_READ_ONLY); + ctx->pll_lock = v4l2_ctrl_new_std(hdl, &max2175_ctrl_ops, + V4L2_CID_RF_TUNER_PLL_LOCK, + 0, 1, 1, 0); + ctx->pll_lock->flags |= (V4L2_CTRL_FLAG_VOLATILE | + V4L2_CTRL_FLAG_READ_ONLY); + ctx->i2s_en = v4l2_ctrl_new_custom(hdl, &max2175_i2s_en, NULL); + ctx->i2s_mode = v4l2_ctrl_new_custom(hdl, &max2175_i2s_mode, NULL); + ctx->am_hiz = v4l2_ctrl_new_custom(hdl, &max2175_am_hiz, NULL); + ctx->hsls = v4l2_ctrl_new_custom(hdl, &max2175_hsls, NULL); + + if (ctx->xtal_freq == MAX2175_EU_XTAL_FREQ) { + ctx->rx_mode = v4l2_ctrl_new_custom(hdl, + &max2175_eu_rx_mode, NULL); + ctx->rx_modes = (struct max2175_rxmode *)eu_rx_modes; + } else { + ctx->rx_mode = v4l2_ctrl_new_custom(hdl, + &max2175_na_rx_mode, NULL); + ctx->rx_modes = (struct max2175_rxmode *)na_rx_modes; + } + ctx->sd.ctrl_handler = &ctx->ctrl_hdl; + + ret = v4l2_async_register_subdev(sd); + if (ret) { + dev_err(&client->dev, "register subdev failed\n"); + goto err_reg; + } + dev_info(&client->dev, "subdev registered\n"); + + /* Initialize device */ + ret = max2175_core_init(ctx, refout_bits); + if (ret) + goto err_init; + + mxm_dbg(ctx, "probed\n"); + return 0; + +err_init: + v4l2_async_unregister_subdev(sd); +err_reg: + v4l2_ctrl_handler_free(&ctx->ctrl_hdl); +err: + kfree(ctx); + return ret; +} + +static int max2175_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct max2175_ctx *ctx = max2175_ctx_from_sd(sd); + + v4l2_ctrl_handler_free(&ctx->ctrl_hdl); + v4l2_async_unregister_subdev(sd); + mxm_dbg(ctx, "removed\n"); + kfree(ctx); + return 0; +} + +static const struct i2c_device_id max2175_id[] = { + { DRIVER_NAME, 0}, + {}, +}; + +MODULE_DEVICE_TABLE(i2c, max2175_id); + +static const struct of_device_id max2175_of_ids[] = { + { .compatible = "maxim, max2175", }, + { } +}; +MODULE_DEVICE_TABLE(of, max2175_of_ids); + +static struct i2c_driver max2175_driver = { + .driver = { + .name = DRIVER_NAME, + .of_match_table = max2175_of_ids, + }, + .probe = max2175_probe, + .remove = max2175_remove, + .id_table = max2175_id, +}; + +module_i2c_driver(max2175_driver); + +MODULE_DESCRIPTION("Maxim MAX2175 RF to Bits tuner driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Ramesh Shanmugasundaram "); diff --git a/drivers/media/i2c/max2175/max2175.h b/drivers/media/i2c/max2175/max2175.h new file mode 100644 index 0000000..61a508b --- /dev/null +++ b/drivers/media/i2c/max2175/max2175.h @@ -0,0 +1,124 @@ +/* + * 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 chip. + * + * Copyright (C) 2016 Maxim Integrated Products + * Copyright (C) 2016 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__ + +#include + +enum max2175_region { + MAX2175_REGION_EU = 0, /* Europe */ + MAX2175_REGION_NA, /* North America */ +}; + +#define MAX2175_EU_XTAL_FREQ (36864000) /* In Hz */ +#define MAX2175_NA_XTAL_FREQ (40186125) /* In Hz */ + +enum max2175_band { + MAX2175_BAND_AM = 0, + MAX2175_BAND_FM, + MAX2175_BAND_VHF, + MAX2175_BAND_L, +}; + +/* NOTE: Any addition/deletion in the below enum should be reflected in + * V4L2_CID_MAX2175_RX_MODE ctrl strings + */ +enum max2175_modetag { + /* EU modes */ + MAX2175_DAB_1_2 = 0, + + /* Other possible modes to add in future + * MAX2175_DAB_1_0, + * MAX2175_DAB_1_3, + * MAX2175_EU_FM_2_2, + * MAX2175_EU_FM_1_0, + * MAX2175_EU_FMHD_4_0, + * MAX2175_EU_AM_1_0, + * MAX2175_EU_AM_2_2, + */ + + /* NA modes */ + MAX2175_NA_FM_1_0 = 0, + + /* Other possible modes to add in future + * MAX2175_NA_FM_1_2, + * 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_CSM_MODE_LOAD_TO_BUFFER = 0, + MAX2175_CSM_MODE_PRESET_TUNE, + MAX2175_CSM_MODE_SEARCH, + MAX2175_CSM_MODE_AF_UPDATE, + MAX2175_CSM_MODE_JUMP_FAST_TUNE, + MAX2175_CSM_MODE_CHECK, + MAX2175_CSM_MODE_LOAD_AND_SWAP, + MAX2175_CSM_MODE_END, + MAX2175_CSM_MODE_BUFFER_PLUS_PRESET_TUNE, + MAX2175_CSM_MODE_BUFFER_PLUS_SEARCH, + MAX2175_CSM_MODE_BUFFER_PLUS_AF_UPDATE, + MAX2175_CSM_MODE_BUFFER_PLUS_JUMP_FAST_TUNE, + MAX2175_CSM_MODE_BUFFER_PLUS_CHECK, + MAX2175_CSM_MODE_BUFFER_PLUS_LOAD_AND_SWAP, + MAX2175_CSM_MODE_NO_ACTION +}; + +/* Rx mode */ +struct max2175_rxmode { + enum max2175_band band; /* Associated band */ + u32 freq; /* Default freq in Hz */ + u8 i2s_word_size; /* Bit value */ + u8 i2s_modes[4]; /* Supported modes */ +}; + +/* Register map */ +struct max2175_regmap { + u8 idx; /* Register index */ + u8 val; /* Register value */ +}; + +#endif /* __MAX2175_H__ */