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[209.132.180.67]) by mx.google.com with ESMTP id p35-v6si3903391pgl.202.2018.08.02.19.08.52; Thu, 02 Aug 2018 19:08:52 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-media-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-media-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-media-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725773AbeHCECq (ORCPT + 4 others); Fri, 3 Aug 2018 00:02:46 -0400 Received: from mx.socionext.com ([202.248.49.38]:56280 "EHLO mx.socionext.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725733AbeHCECq (ORCPT ); Fri, 3 Aug 2018 00:02:46 -0400 Received: from unknown (HELO kinkan-ex.css.socionext.com) ([172.31.9.52]) by mx.socionext.com with ESMTP; 03 Aug 2018 11:08:49 +0900 Received: from mail.mfilter.local (m-filter-2 [10.213.24.62]) by kinkan-ex.css.socionext.com (Postfix) with ESMTP id 905E518022B; Fri, 3 Aug 2018 11:08:49 +0900 (JST) Received: from 172.31.9.53 (172.31.9.53) by m-FILTER with ESMTP; Fri, 3 Aug 2018 11:08:49 +0900 Received: from yuzu.css.socionext.com (yuzu [172.31.8.45]) by iyokan.css.socionext.com (Postfix) with ESMTP id DC23E4032A; Fri, 3 Aug 2018 11:08:48 +0900 (JST) Received: from aegis.e01.socionext.com (unknown [10.213.134.210]) by yuzu.css.socionext.com (Postfix) with ESMTP id B54C5120149; Fri, 3 Aug 2018 11:08:48 +0900 (JST) From: Katsuhiro Suzuki To: Mauro Carvalho Chehab , linux-media@vger.kernel.org Cc: Masami Hiramatsu , Jassi Brar , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Katsuhiro Suzuki Subject: [PATCH v2] media: dvb-frontends: add LNBH29 LNB supply driver Date: Fri, 3 Aug 2018 11:08:39 +0900 Message-Id: <20180803020839.5967-1-suzuki.katsuhiro@socionext.com> X-Mailer: git-send-email 2.18.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add support for STMicroelectronics LNBH29 LNB supply driver. Signed-off-by: Katsuhiro Suzuki --- Changes since v1: - Fix wrong I2C transfer routine - Remove unused headers --- drivers/media/dvb-frontends/Kconfig | 10 ++ drivers/media/dvb-frontends/Makefile | 1 + drivers/media/dvb-frontends/lnbh29.c | 168 +++++++++++++++++++++++++++ drivers/media/dvb-frontends/lnbh29.h | 36 ++++++ 4 files changed, 215 insertions(+) create mode 100644 drivers/media/dvb-frontends/lnbh29.c create mode 100644 drivers/media/dvb-frontends/lnbh29.h -- 2.18.0 diff --git a/drivers/media/dvb-frontends/Kconfig b/drivers/media/dvb-frontends/Kconfig index 048285134cdf..847da72d1256 100644 --- a/drivers/media/dvb-frontends/Kconfig +++ b/drivers/media/dvb-frontends/Kconfig @@ -791,6 +791,16 @@ config DVB_LNBH25 An SEC control chip. Say Y when you want to support this chip. +config DVB_LNBH29 + tristate "LNBH29 SEC controller" + depends on DVB_CORE && I2C + default m if !MEDIA_SUBDRV_AUTOSELECT + help + LNB power supply and control voltage + regulator chip with step-up converter + and I2C interface for STMicroelectronics LNBH29. + Say Y when you want to support this chip. + config DVB_LNBP21 tristate "LNBP21/LNBH24 SEC controllers" depends on DVB_CORE && I2C diff --git a/drivers/media/dvb-frontends/Makefile b/drivers/media/dvb-frontends/Makefile index 779dfd027b24..e9179162658c 100644 --- a/drivers/media/dvb-frontends/Makefile +++ b/drivers/media/dvb-frontends/Makefile @@ -58,6 +58,7 @@ obj-$(CONFIG_DVB_LGDT3306A) += lgdt3306a.o obj-$(CONFIG_DVB_LG2160) += lg2160.o obj-$(CONFIG_DVB_CX24123) += cx24123.o obj-$(CONFIG_DVB_LNBH25) += lnbh25.o +obj-$(CONFIG_DVB_LNBH29) += lnbh29.o obj-$(CONFIG_DVB_LNBP21) += lnbp21.o obj-$(CONFIG_DVB_LNBP22) += lnbp22.o obj-$(CONFIG_DVB_ISL6405) += isl6405.o diff --git a/drivers/media/dvb-frontends/lnbh29.c b/drivers/media/dvb-frontends/lnbh29.c new file mode 100644 index 000000000000..410bae099c32 --- /dev/null +++ b/drivers/media/dvb-frontends/lnbh29.c @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Driver for LNB supply and control IC STMicroelectronics LNBH29 +// +// Copyright (c) 2018 Socionext Inc. + +#include +#include +#include + +#include +#include "lnbh29.h" + +/** + * struct lnbh29_priv - LNBH29 driver private data + * @i2c: Pointer to the I2C adapter structure + * @i2c_address: I2C address of LNBH29 chip + * @config: Registers configuration + * offset 0: 1st register address, always 0x01 (DATA) + * offset 1: DATA register value + */ +struct lnbh29_priv { + struct i2c_adapter *i2c; + u8 i2c_address; + u8 config[2]; +}; + +#define LNBH29_STATUS_OLF BIT(0) +#define LNBH29_STATUS_OTF BIT(1) +#define LNBH29_STATUS_VMON BIT(2) +#define LNBH29_STATUS_PNG BIT(3) +#define LNBH29_STATUS_PDO BIT(4) +#define LNBH29_VSEL_MASK GENMASK(2, 0) +#define LNBH29_VSEL_0 0x00 +/* Min: 13.188V, Typ: 13.667V, Max:14V */ +#define LNBH29_VSEL_13 0x03 +/* Min: 18.158V, Typ: 18.817V, Max:19.475V */ +#define LNBH29_VSEL_18 0x07 + +static int lnbh29_read_vmon(struct lnbh29_priv *priv) +{ + u8 addr = 0x00; + u8 status[2]; + int ret; + struct i2c_msg msg[2] = { + { + .addr = priv->i2c_address, + .flags = 0, + .len = 1, + .buf = &addr + }, { + .addr = priv->i2c_address, + .flags = I2C_M_RD, + .len = sizeof(status), + .buf = status + } + }; + + ret = i2c_transfer(priv->i2c, msg, 2); + if (ret >= 0 && ret != 2) + ret = -EIO; + if (ret < 0) { + dev_dbg(&priv->i2c->dev, "LNBH29 I2C transfer failed (%d)\n", + ret); + return ret; + } + + if (status[0] & (LNBH29_STATUS_OLF | LNBH29_STATUS_VMON)) { + dev_err(&priv->i2c->dev, + "LNBH29 voltage in failure state, status reg 0x%x\n", + status[0]); + return -EIO; + } + + return 0; +} + +static int lnbh29_set_voltage(struct dvb_frontend *fe, + enum fe_sec_voltage voltage) +{ + struct lnbh29_priv *priv = fe->sec_priv; + u8 data_reg; + int ret; + struct i2c_msg msg = { + .addr = priv->i2c_address, + .flags = 0, + .len = sizeof(priv->config), + .buf = priv->config + }; + + switch (voltage) { + case SEC_VOLTAGE_OFF: + data_reg = LNBH29_VSEL_0; + break; + case SEC_VOLTAGE_13: + data_reg = LNBH29_VSEL_13; + break; + case SEC_VOLTAGE_18: + data_reg = LNBH29_VSEL_18; + break; + default: + return -EINVAL; + } + priv->config[1] &= ~LNBH29_VSEL_MASK; + priv->config[1] |= data_reg; + + ret = i2c_transfer(priv->i2c, &msg, 1); + if (ret >= 0 && ret != 1) + ret = -EIO; + if (ret < 0) { + dev_err(&priv->i2c->dev, "LNBH29 I2C transfer error (%d)\n", + ret); + return ret; + } + + /* Soft-start time (Vout 0V to 18V) is Typ. 6ms. */ + usleep_range(6000, 20000); + + if (voltage == SEC_VOLTAGE_OFF) + return 0; + + return lnbh29_read_vmon(priv); +} + +static void lnbh29_release(struct dvb_frontend *fe) +{ + lnbh29_set_voltage(fe, SEC_VOLTAGE_OFF); + kfree(fe->sec_priv); + fe->sec_priv = NULL; +} + +struct dvb_frontend *lnbh29_attach(struct dvb_frontend *fe, + struct lnbh29_config *cfg, + struct i2c_adapter *i2c) +{ + struct lnbh29_priv *priv; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return NULL; + + priv->i2c_address = (cfg->i2c_address >> 1); + priv->i2c = i2c; + priv->config[0] = 0x01; + priv->config[1] = cfg->data_config; + fe->sec_priv = priv; + + if (lnbh29_set_voltage(fe, SEC_VOLTAGE_OFF)) { + dev_err(&i2c->dev, "no LNBH29 found at I2C addr 0x%02x\n", + priv->i2c_address); + kfree(priv); + fe->sec_priv = NULL; + return NULL; + } + + fe->ops.release_sec = lnbh29_release; + fe->ops.set_voltage = lnbh29_set_voltage; + + dev_info(&i2c->dev, "LNBH29 attached at I2C addr 0x%02x\n", + priv->i2c_address); + + return fe; +} +EXPORT_SYMBOL(lnbh29_attach); + +MODULE_AUTHOR("Katsuhiro Suzuki "); +MODULE_DESCRIPTION("STMicroelectronics LNBH29 driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/media/dvb-frontends/lnbh29.h b/drivers/media/dvb-frontends/lnbh29.h new file mode 100644 index 000000000000..6179921520d9 --- /dev/null +++ b/drivers/media/dvb-frontends/lnbh29.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Driver for LNB supply and control IC STMicroelectronics LNBH29 + * + * Copyright (c) 2018 Socionext Inc. + */ + +#ifndef LNBH29_H +#define LNBH29_H + +#include +#include + +/* Using very low E.S.R. capacitors or ceramic caps */ +#define LNBH29_DATA_COMP BIT(3) + +struct lnbh29_config { + u8 i2c_address; + u8 data_config; +}; + +#if IS_REACHABLE(CONFIG_DVB_LNBH29) +struct dvb_frontend *lnbh29_attach(struct dvb_frontend *fe, + struct lnbh29_config *cfg, + struct i2c_adapter *i2c); +#else +static inline struct dvb_frontend *lnbh29_attach(struct dvb_frontend *fe, + struct lnbh29_config *cfg, + struct i2c_adapter *i2c) +{ + printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__); + return NULL; +} +#endif + +#endif