From patchwork Fri Apr 11 11:48:29 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Stanislawski X-Patchwork-Id: 3968101 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 35ED49F374 for ; Fri, 11 Apr 2014 11:49:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 05F7D207FD for ; Fri, 11 Apr 2014 11:49:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B948620807 for ; Fri, 11 Apr 2014 11:49:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755524AbaDKLt0 (ORCPT ); Fri, 11 Apr 2014 07:49:26 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:34194 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755363AbaDKLtX (ORCPT ); Fri, 11 Apr 2014 07:49:23 -0400 Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N3V00B9T7I99Y10@mailout4.samsung.com>; Fri, 11 Apr 2014 20:49:21 +0900 (KST) X-AuditID: cbfee61b-b7f456d000006dfd-a2-5347d6c1d0e5 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id F1.02.28157.1C6D7435; Fri, 11 Apr 2014 20:49:21 +0900 (KST) Received: from mcdsrvbld02.digital.local ([106.116.37.23]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N3V009RD7HRKY70@mmp1.samsung.com>; Fri, 11 Apr 2014 20:49:20 +0900 (KST) From: Tomasz Stanislawski To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org Cc: t.figa@samsung.com, kyungmin.park@samsung.com, m.szyprowski@samsung.com, robh+dt@kernel.org, arnd@arndb.de, gregkh@linuxfoundation.org, grant.likely@linaro.org, kgene.kim@samsung.com, rdunlap@infradead.org, ben-linux@fluff.org, Tomasz Stanislawski Subject: [PATCH 1/2] misc: add sii9234 driver Date: Fri, 11 Apr 2014 13:48:29 +0200 Message-id: <1397216910-15904-2-git-send-email-t.stanislaws@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-reply-to: <1397216910-15904-1-git-send-email-t.stanislaws@samsung.com> References: <1397216910-15904-1-git-send-email-t.stanislaws@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrKLMWRmVeSWpSXmKPExsVy+t9jAd2D19yDDc5eELT4O+kYu8WkdQeY LOYfOcdqceXrezaLA392MFo0L17PZtG74CqbxdmmN+wWmx5fY7VY2LaExeLyrjlsFj0btrJa zDi/j8li7ZG77BZv70xnsWjde4TdYv2M1ywW89pfsjoIefz+NYnR4++qF8wem1doeWxa1cnm cefaHjaP/XPXsHvc7z7O5LF5Sb1H35ZVjB6fN8kFcEVx2aSk5mSWpRbp2yVwZfw5fpq94Nx8 porljzsYGxgvvGDsYuTkkBAwkbgzYxsrhC0mceHeerYuRi4OIYFFjBLrW9cyQjhdTBJ3f+8A 62AD6ji25DNYQkTgCaPEursH2EEcZoE5TBLf3x9kBqkSFtCV6Jm9A2wui4CqxMTrS4GKODh4 BTwkdhxNhFinKNH9bAIbiM0p4Cmxd+dWsAVCQCWPTsxmncDIu4CRYRWjaGpBckFxUnqukV5x Ym5xaV66XnJ+7iZGcOA/k97BuKrB4hCjAAejEg/vgUtuwUKsiWXFlbmHGCU4mJVEeDdddQ8W 4k1JrKxKLcqPLyrNSS0+xCjNwaIkznuw1TpQSCA9sSQ1OzW1ILUIJsvEwSnVwJh/9WXHey+j b48NGnNtoqyWF72J2mojuOTSp/NyJm2PfpX7CfuJrG3YVb76yP3PHmprfBiDFLbyaMhOXzCl VihiZ5rZ6TXTJ/1gFls4c/nOXQGHqy7MvxF/7MSJc/F3Lnxwe8n9nXdf8r45DZvdLp/+GL3n wgp35uCsHemPW+uWns7mWLM0NTFPiaU4I9FQi7moOBEAuKAXungCAAA= Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add driver for HDMI bridge using MHL connection. Contains refactored code for MHL driver developed by: Adam Hampson Erik Gilling Shankar Bandal Dharam Kumar Signed-off-by: Tomasz Stanislawski Signed-off-by: Kyungmin Park --- Documentation/devicetree/bindings/sii9234.txt | 22 + drivers/misc/Kconfig | 8 + drivers/misc/Makefile | 1 + drivers/misc/sii9234.c | 1081 +++++++++++++++++++++++++ 4 files changed, 1112 insertions(+) create mode 100644 Documentation/devicetree/bindings/sii9234.txt create mode 100644 drivers/misc/sii9234.c diff --git a/Documentation/devicetree/bindings/sii9234.txt b/Documentation/devicetree/bindings/sii9234.txt new file mode 100644 index 0000000..4431139 --- /dev/null +++ b/Documentation/devicetree/bindings/sii9234.txt @@ -0,0 +1,22 @@ +SiI9234 Mobile HD Link Transmitter + +Required properties: +- compatible : "sil,sii9234". +- reg : I2C address for TPI interface, use 0x39 +- vcc-supply : regulator that supplies the chip +- gpio-reset : GPIO connected to RESET_N pin +- gpio-int : GPIO connected to INT pin + +Optional properties: +- extcon : phandle to extcon that wakes up the chip + +Additional compatible properties are also allowed. + +Example: + sii9234@39 { + compatible = "sil,sii9234"; + reg = <0x39>; + vcc-supply = <&vsil>; + gpio-reset = <&gpf3 4 0>; + gpio-int = <&gpf3 5 0>; + }; diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 1cb7408..3b7f266 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -515,6 +515,14 @@ config SRAM the genalloc API. It is supposed to be used for small on-chip SRAM areas found on many SoCs. +config SII9234 + tristate "Silicon Image SII9234 Driver" + depends on I2C + help + Say Y here if you want support for the MHL interface. + It is an I2C driver, that detects connection of MHL bridge + and starts encapsulation of HDMI signal. + source "drivers/misc/c2port/Kconfig" source "drivers/misc/eeprom/Kconfig" source "drivers/misc/cb710/Kconfig" diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 7eb4b69..145a47a 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -55,3 +55,4 @@ obj-$(CONFIG_SRAM) += sram.o obj-y += mic/ obj-$(CONFIG_GENWQE) += genwqe/ obj-$(CONFIG_ECHO) += echo/ +obj-$(CONFIG_SII9234) += sii9234.o diff --git a/drivers/misc/sii9234.c b/drivers/misc/sii9234.c new file mode 100644 index 0000000..60b7c66 --- /dev/null +++ b/drivers/misc/sii9234.c @@ -0,0 +1,1081 @@ +/* + * Copyright (C) 2014 Samsung Electronics + * + * Author: Tomasz Stanislawski + * + * Based on sii9234 driver created by: + * Adam Hampson + * Erik Gilling + * Shankar Bandal + * Dharam Kumar + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* MHL Tx registers and bits */ +#define MHL_TX_SRST 0x05 +#define MHL_TX_SYSSTAT_REG 0x09 +#define RSEN_STATUS (1<<2) +#define MHL_TX_INTR1_REG 0x71 +#define HPD_CHANGE_INT (1<<6) +#define RSEN_CHANGE_INT (1<<5) +#define MHL_TX_INTR4_REG 0x74 +#define RGND_READY_INT (1<<6) +#define VBUS_LOW_INT (1<<5) +#define CBUS_LKOUT_INT (1<<4) +#define MHL_DISC_FAIL_INT (1<<3) +#define MHL_EST_INT (1<<2) +#define MHL_TX_INTR1_ENABLE_REG 0x75 +#define HPD_CHANGE_INT_MASK (1<<6) +#define RSEN_CHANGE_INT_MASK (1<<5) +#define MHL_TX_INTR4_ENABLE_REG 0x78 +#define RGND_READY_MASK (1<<6) +#define CBUS_LKOUT_MASK (1<<4) +#define MHL_DISC_FAIL_MASK (1<<3) +#define MHL_EST_MASK (1<<2) +#define MHL_TX_INT_CTRL_REG 0x79 +#define MHL_TX_TMDS_CCTRL 0x80 +#define MHL_TX_DISC_CTRL1_REG 0x90 +#define MHL_TX_DISC_CTRL2_REG 0x91 +#define SKIP_GND (1<<6) +#define ATT_THRESH_SHIFT 0x04 +#define ATT_THRESH_MASK (0x03 << ATT_THRESH_SHIFT) +#define USB_D_OEN (1<<3) +#define DEGLITCH_TIME_MASK 0x07 +#define DEGLITCH_TIME_2MS 0 +#define DEGLITCH_TIME_4MS 1 +#define DEGLITCH_TIME_8MS 2 +#define DEGLITCH_TIME_16MS 3 +#define DEGLITCH_TIME_40MS 4 +#define DEGLITCH_TIME_50MS 5 +#define DEGLITCH_TIME_60MS 6 +#define DEGLITCH_TIME_128MS 7 +#define MHL_TX_DISC_CTRL3_REG 0x92 +#define MHL_TX_DISC_CTRL4_REG 0x93 +#define MHL_TX_DISC_CTRL5_REG 0x94 +#define MHL_TX_DISC_CTRL6_REG 0x95 +#define USB_D_OVR (1<<7) +#define USB_ID_OVR (1<<6) +#define DVRFLT_SEL (1<<5) +#define BLOCK_RGND_INT (1<<4) +#define SKIP_DEG (1<<3) +#define CI2CA_POL (1<<2) +#define CI2CA_WKUP (1<<1) +#define SINGLE_ATT (1<<0) +#define MHL_TX_DISC_CTRL7_REG 0x96 +#define USB_D_ODN (1<<5) +#define VBUS_CHECK (1<<2) +#define RGND_INTP_MASK 0x03 +#define RGND_INTP_OPEN 0 +#define RGND_INTP_2K 1 +#define RGND_INTP_1K 2 +#define RGND_INTP_SHORT 3 +#define MHL_TX_DISC_CTRL8_REG 0x97 +#define MHL_TX_STAT2_REG 0x99 +#define MHL_TX_MHLTX_CTL1_REG 0xA0 +#define MHL_TX_MHLTX_CTL2_REG 0xA1 +#define MHL_TX_MHLTX_CTL4_REG 0xA3 +#define MHL_TX_MHLTX_CTL6_REG 0xA5 +#define MHL_TX_MHLTX_CTL7_REG 0xA6 + +/* HDMI registers */ +#define HDMI_RX_TMDS0_CCTRL1_REG 0x10 +#define HDMI_RX_TMDS_CLK_EN_REG 0x11 +#define HDMI_RX_TMDS_CH_EN_REG 0x12 +#define HDMI_RX_PLL_CALREFSEL_REG 0x17 +#define HDMI_RX_PLL_VCOCAL_REG 0x1A +#define HDMI_RX_EQ_DATA0_REG 0x22 +#define HDMI_RX_EQ_DATA1_REG 0x23 +#define HDMI_RX_EQ_DATA2_REG 0x24 +#define HDMI_RX_EQ_DATA3_REG 0x25 +#define HDMI_RX_EQ_DATA4_REG 0x26 +#define HDMI_RX_TMDS_ZONE_CTRL_REG 0x4C +#define HDMI_RX_TMDS_MODE_CTRL_REG 0x4D + +/* CBUS registers */ +#define CBUS_INT_STATUS_1_REG 0x08 +#define CBUS_INTR1_ENABLE_REG 0x09 +#define CBUS_MSC_REQ_ABORT_REASON_REG 0x0D +#define SET_HPD_DOWNSTREAM (1<<6) +#define CBUS_INT_STATUS_2_REG 0x1E +#define CBUS_INTR2_ENABLE_REG 0x1F +#define CBUS_LINK_CONTROL_2_REG 0x31 +#define CBUS_DEVCAP_DEV_STATE 0x80 +#define CBUS_DEVCAP_MHL_VERSION 0x81 +#define CBUS_DEVCAP_DEV_CAT 0x82 +#define CBUS_DEVCAP_ADOPTER_ID_H 0x83 +#define CBUS_DEVCAP_ADOPTER_ID_L 0x84 +#define CBUS_DEVCAP_VID_LINK_MODE 0x85 +#define CBUS_DEVCAP_AUD_LINK_MODE 0x86 +#define CBUS_DEVCAP_VIDEO_TYPE 0x87 +#define CBUS_DEVCAP_LOG_DEV_MAP 0x88 +#define CBUS_DEVCAP_BANDWIDTH 0x89 +#define CBUS_DEVCAP_DEV_FEATURE_FLAG 0x8A +#define CBUS_DEVCAP_DEVICE_ID_H 0x8B +#define CBUS_DEVCAP_DEVICE_ID_L 0x8C +#define CBUS_DEVCAP_SCRATCHPAD_SIZE 0x8D +#define CBUS_DEVCAP_INT_STAT_SIZE 0x8E +#define CBUS_DEVCAP_RESERVED 0x8F +#define CBUS_MHL_STATUS_REG_0 0xB0 +#define CBUS_MHL_STATUS_REG_1 0xB1 + +/* TPI registers */ +#define TPI_DPD_REG 0x3D + +/* timeouts */ +#define T_SRC_VBUS_CBUS_TO_STABLE 200 +#define T_SRC_CBUS_FLOAT 100 +#define T_SRC_CBUS_DEGLITCH 2 +#define T_SRC_RXSENSE_DEGLITCH 110 + +enum sii9234_state { + ST_OFF, + ST_D3, + ST_RGND_INIT, + ST_RGND_1K, + ST_RSEN_HIGH, + ST_MHL_ESTABLISHED, + ST_FAILURE_DISCOVERY, + ST_FAILURE, +}; + +struct sii9234 { + struct i2c_client *client[4]; + int i2c_error; + int gpio_n_reset; + int gpio_int; + struct regulator *vcc_supply; + int irq; + + enum sii9234_state state; + struct mutex lock; + + /* Extcon */ + struct extcon_specific_cable_nb extcon_dev; + struct notifier_block extcon_nb; + struct work_struct extcon_wq; + bool extcon_attached; +}; + +enum sii9234_client_id { + I2C_MHL, + I2C_TPI, + I2C_HDMI, + I2C_CBUS, +}; + +#define sii9234_dev(sii9234) (&(sii9234)->client[I2C_MHL]->dev) + +static char *sii9234_client_name[] = { + [I2C_MHL] = "MHL", + [I2C_TPI] = "TPI", + [I2C_HDMI] = "HDMI", + [I2C_CBUS] = "CBUS", +}; + +static int sii9234_writeb(struct sii9234 *sii9234, int id, int offset, + int value) +{ + int ret; + struct i2c_client *client = sii9234->client[id]; + struct device *dev = sii9234_dev(sii9234); + + if (sii9234->i2c_error) + return sii9234->i2c_error; + + ret = i2c_smbus_write_byte_data(client, offset, value); + if (ret < 0) + dev_err(dev, "writeb: %4s[0x%02x] <- 0x%02x\n", + sii9234_client_name[id], offset, value); + sii9234->i2c_error = ret; + return ret; +} + +static int sii9234_writebm(struct sii9234 *sii9234, int id, int offset, + int value, int mask) +{ + int ret; + struct i2c_client *client = sii9234->client[id]; + struct device *dev = sii9234_dev(sii9234); + + if (sii9234->i2c_error) + return sii9234->i2c_error; + + ret = i2c_smbus_write_byte(client, offset); + if (ret < 0) { + dev_err(dev, "writebm: %4s[0x%02x] <- 0x%02x\n", + sii9234_client_name[id], offset, value); + sii9234->i2c_error = ret; + return ret; + } + + ret = i2c_smbus_read_byte(client); + if (ret < 0) { + dev_err(dev, "writebm: %4s[0x%02x] <- 0x%02x\n", + sii9234_client_name[id], offset, value); + sii9234->i2c_error = ret; + return ret; + } + + value = (value & mask) | (ret & ~mask); + + ret = i2c_smbus_write_byte_data(client, offset, value); + if (ret < 0) { + dev_err(dev, "writebm: %4s[0x%02x] <- 0x%02x\n", + sii9234_client_name[id], offset, value); + sii9234->i2c_error = ret; + } + return ret; +} + +static int sii9234_readb(struct sii9234 *sii9234, int id, int offset) +{ + int ret; + struct i2c_client *client = sii9234->client[id]; + struct device *dev = sii9234_dev(sii9234); + + if (sii9234->i2c_error) + return sii9234->i2c_error; + + ret = i2c_smbus_write_byte(client, offset); + if (ret < 0) { + dev_err(dev, "readb: %4s[0x%02x]\n", + sii9234_client_name[id], offset); + sii9234->i2c_error = ret; + return ret; + } + + ret = i2c_smbus_read_byte(client); + if (ret < 0) { + dev_err(dev, "readb: %4s[0x%02x]\n", + sii9234_client_name[id], offset); + sii9234->i2c_error = ret; + } + + return ret; +} + +static int sii9234_clear_error(struct sii9234 *sii9234) +{ + int ret = sii9234->i2c_error; + + sii9234->i2c_error = 0; + return ret; +} + +#define mhl_tx_writeb(sii9234, offset, value) \ + sii9234_writeb(sii9234, I2C_MHL, offset, value) +#define mhl_tx_writebm(sii9234, offset, value, mask) \ + sii9234_writebm(sii9234, I2C_MHL, offset, value, mask) +#define mhl_tx_readb(sii9234, offset) \ + sii9234_readb(sii9234, I2C_MHL, offset) +#define cbus_writeb(sii9234, offset, value) \ + sii9234_writeb(sii9234, I2C_CBUS, offset, value) +#define cbus_writebm(sii9234, offset, value, mask) \ + sii9234_writebm(sii9234, I2C_CBUS, offset, value, mask) +#define cbus_readb(sii9234, offset) \ + sii9234_readb(sii9234, I2C_CBUS, offset) +#define hdmi_writeb(sii9234, offset, value) \ + sii9234_writeb(sii9234, I2C_HDMI, offset, value) +#define hdmi_writebm(sii9234, offset, value, mask) \ + sii9234_writebm(sii9234, I2C_HDMI, offset, value, mask) +#define hdmi_readb(sii9234, offset) \ + sii9234_readb(sii9234, I2C_HDMI, offset) +#define tpi_writeb(sii9234, offset, value) \ + sii9234_writeb(sii9234, I2C_TPI, offset, value) +#define tpi_writebm(sii9234, offset, value, mask) \ + sii9234_writebm(sii9234, I2C_TPI, offset, value, mask) +#define tpi_readb(sii9234, offset) \ + sii9234_readb(sii9234, I2C_TPI, offset) + +static u8 sii9234_tmds_control(struct sii9234 *sii9234, bool enable) +{ + mhl_tx_writebm(sii9234, MHL_TX_TMDS_CCTRL, enable ? ~0 : 0, 0x10); + mhl_tx_writebm(sii9234, MHL_TX_INT_CTRL_REG, enable ? ~0 : 0, 0x30); + return sii9234_clear_error(sii9234); +} + +static int sii9234_cbus_reset(struct sii9234 *sii9234) +{ + int i; + + /* Reset CBUS */ + mhl_tx_writebm(sii9234, MHL_TX_SRST, ~0, 1 << 3); + /* CBUS deglitch - 2ms */ + msleep(T_SRC_CBUS_DEGLITCH); + mhl_tx_writebm(sii9234, MHL_TX_SRST, 0, 1 << 3); + + for (i = 0; i < 4; i++) { + /* Enable WRITE_STAT interrupt for writes to all + 4 MSC Status registers. */ + cbus_writeb(sii9234, 0xE0 + i, 0xF2); + /*Enable SET_INT interrupt for writes to all + 4 MSC Interrupt registers. */ + cbus_writeb(sii9234, 0xF0 + i, 0xF2); + } + + return sii9234_clear_error(sii9234); +} + +/* require to chek mhl imformation of samsung in cbus_init_register*/ +static int sii9234_cbus_init(struct sii9234 *sii9234) +{ + cbus_writeb(sii9234, 0x07, 0xF2); + cbus_writeb(sii9234, 0x40, 0x03); + cbus_writeb(sii9234, 0x42, 0x06); + cbus_writeb(sii9234, 0x36, 0x0C); + cbus_writeb(sii9234, 0x3D, 0xFD); + cbus_writeb(sii9234, 0x1C, 0x01); + cbus_writeb(sii9234, 0x1D, 0x0F); + cbus_writeb(sii9234, 0x44, 0x02); + /* Setup our devcap */ + /* To meet cts 6.3.10.1 spec */ + cbus_writeb(sii9234, CBUS_DEVCAP_DEV_STATE, 0x00); + /* mhl version 1.1 */ + cbus_writeb(sii9234, CBUS_DEVCAP_MHL_VERSION, 0x11); + cbus_writeb(sii9234, CBUS_DEVCAP_DEV_CAT, 0x02); + cbus_writeb(sii9234, CBUS_DEVCAP_ADOPTER_ID_H, 0x01); + cbus_writeb(sii9234, CBUS_DEVCAP_ADOPTER_ID_L, 0x41); + /* YCbCr444, RGB444 */ + cbus_writeb(sii9234, CBUS_DEVCAP_VID_LINK_MODE, 0x03); + cbus_writeb(sii9234, CBUS_DEVCAP_VIDEO_TYPE, 0); + cbus_writeb(sii9234, CBUS_DEVCAP_LOG_DEV_MAP, 0x80); + cbus_writeb(sii9234, CBUS_DEVCAP_BANDWIDTH, 0x0F); + cbus_writeb(sii9234, CBUS_DEVCAP_DEV_FEATURE_FLAG, 0x07); + cbus_writeb(sii9234, CBUS_DEVCAP_DEVICE_ID_H, 0x0); + cbus_writeb(sii9234, CBUS_DEVCAP_DEVICE_ID_L, 0x0); + cbus_writeb(sii9234, CBUS_DEVCAP_SCRATCHPAD_SIZE, 0x10); + cbus_writeb(sii9234, CBUS_DEVCAP_INT_STAT_SIZE, 0x33); + cbus_writeb(sii9234, CBUS_DEVCAP_RESERVED, 0); + cbus_writebm(sii9234, 0x31, 0x0C, 0x0C); + cbus_writeb(sii9234, 0x30, 0x01); + cbus_writebm(sii9234, 0x3C, 0x30, 0x38); + cbus_writebm(sii9234, 0x22, 0x0D, 0x0F); + cbus_writebm(sii9234, 0x2E, 0x15, 0x15); + cbus_writeb(sii9234, CBUS_INTR1_ENABLE_REG, 0); + cbus_writeb(sii9234, CBUS_INTR2_ENABLE_REG, 0); + + return sii9234_clear_error(sii9234); +} + +static void force_usb_id_switch_open(struct sii9234 *sii9234) +{ + /*Disable CBUS discovery */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL1_REG, 0, 0x01); + /*Force USB ID switch to open */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL6_REG, ~0, USB_ID_OVR); + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL3_REG, ~0, 0x86); + /*Force upstream HPD to 0 when not in MHL mode. */ + mhl_tx_writebm(sii9234, MHL_TX_INT_CTRL_REG, 0, 0x30); +} + +static void release_usb_id_switch_open(struct sii9234 *sii9234) +{ + msleep(T_SRC_CBUS_FLOAT); + /* clear USB ID switch to open */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL6_REG, 0, USB_ID_OVR); + /* Enable CBUS discovery */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL1_REG, ~0, 0x01); +} + +static int sii9234_power_init(struct sii9234 *sii9234) +{ + /* Force the SiI9234 into the D0 state. */ + tpi_writeb(sii9234, TPI_DPD_REG, 0x3F); + /* Enable TxPLL Clock */ + hdmi_writeb(sii9234, HDMI_RX_TMDS_CLK_EN_REG, 0x01); + /* Enable Tx Clock Path & Equalizer */ + hdmi_writeb(sii9234, HDMI_RX_TMDS_CH_EN_REG, 0x15); + /* Power Up TMDS */ + mhl_tx_writeb(sii9234, 0x08, 0x35); + return sii9234_clear_error(sii9234); +} + +static int sii9234_hdmi_init(struct sii9234 *sii9234) +{ + /* Analog PLL Control bits 5:4 = 2b00 as per char. team. */ + hdmi_writeb(sii9234, HDMI_RX_TMDS0_CCTRL1_REG, 0xC1); + /* PLL Calrefsel */ + hdmi_writeb(sii9234, HDMI_RX_PLL_CALREFSEL_REG, 0x03); + /* VCO Cal */ + hdmi_writeb(sii9234, HDMI_RX_PLL_VCOCAL_REG, 0x20); + /* Auto EQ */ + hdmi_writeb(sii9234, HDMI_RX_EQ_DATA0_REG, 0x8A); + /* Auto EQ */ + hdmi_writeb(sii9234, HDMI_RX_EQ_DATA1_REG, 0x6A); + /* Auto EQ */ + hdmi_writeb(sii9234, HDMI_RX_EQ_DATA2_REG, 0xAA); + /* Auto EQ */ + hdmi_writeb(sii9234, HDMI_RX_EQ_DATA3_REG, 0xCA); + /* Auto EQ */ + hdmi_writeb(sii9234, HDMI_RX_EQ_DATA4_REG, 0xEA); + /* Manual zone */ + hdmi_writeb(sii9234, HDMI_RX_TMDS_ZONE_CTRL_REG, 0xA0); + /* PLL Mode Value */ + hdmi_writeb(sii9234, HDMI_RX_TMDS_MODE_CTRL_REG, 0x00); + mhl_tx_writeb(sii9234, MHL_TX_TMDS_CCTRL, 0x34); + hdmi_writeb(sii9234, 0x45, 0x44); + /* Rx PLL BW ~ 4MHz */ + hdmi_writeb(sii9234, 0x31, 0x0A); + /* Analog PLL Control * bits 5:4 = 2b00 as per char. team. */ + hdmi_writeb(sii9234, HDMI_RX_TMDS0_CCTRL1_REG, 0xC1); + + return sii9234_clear_error(sii9234); +} + +static int sii9234_mhl_tx_ctl_int(struct sii9234 *sii9234) +{ + mhl_tx_writeb(sii9234, MHL_TX_MHLTX_CTL1_REG, 0xD0); + mhl_tx_writeb(sii9234, MHL_TX_MHLTX_CTL2_REG, 0xFC); + mhl_tx_writeb(sii9234, MHL_TX_MHLTX_CTL4_REG, 0xEB); + mhl_tx_writeb(sii9234, MHL_TX_MHLTX_CTL7_REG, 0x0C); + return sii9234_clear_error(sii9234); +} + +static int sii9234_reset(struct sii9234 *sii9234) +{ + int ret; + + sii9234_clear_error(sii9234); + + ret = sii9234_power_init(sii9234); + if (ret < 0) + return ret; + ret = sii9234_cbus_reset(sii9234); + if (ret < 0) + return ret; + ret = sii9234_hdmi_init(sii9234); + if (ret < 0) + return ret; + ret = sii9234_mhl_tx_ctl_int(sii9234); + if (ret < 0) + return ret; + + /* Enable HDCP Compliance safety */ + mhl_tx_writeb(sii9234, 0x2B, 0x01); + /* CBUS discovery cycle time for each drive and float = 150us */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL1_REG, 0x04, 0x06); + /* Clear bit 6 (reg_skip_rgnd) */ + mhl_tx_writeb(sii9234, MHL_TX_DISC_CTRL2_REG, (1 << 7) /* Reserved */ + | 2 << ATT_THRESH_SHIFT | DEGLITCH_TIME_50MS); + /* Changed from 66 to 65 for 94[1:0] = 01 = 5k reg_cbusmhl_pup_sel */ + /* 1.8V CBUS VTH & GND threshold */ + /*To meet CTS 3.3.7.2 spec */ + mhl_tx_writeb(sii9234, MHL_TX_DISC_CTRL5_REG, 0x77); + /* set bit 2 and 3, which is Initiator Timeout */ + cbus_writebm(sii9234, CBUS_LINK_CONTROL_2_REG, ~0, 0x0C); + mhl_tx_writeb(sii9234, MHL_TX_MHLTX_CTL6_REG, 0xA0); + /* RGND & single discovery attempt (RGND blocking) */ + mhl_tx_writeb(sii9234, MHL_TX_DISC_CTRL6_REG, BLOCK_RGND_INT | + DVRFLT_SEL | SINGLE_ATT); + /* Use VBUS path of discovery state machine */ + mhl_tx_writeb(sii9234, MHL_TX_DISC_CTRL8_REG, 0); + /* 0x92[3] sets the CBUS / ID switch */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL6_REG, ~0, USB_ID_OVR); + /* To allow RGND engine to operate correctly. + * When moving the chip from D2 to D0 (power up, init regs) + * the values should be + * 94[1:0] = 01 reg_cbusmhl_pup_sel[1:0] should be set for 5k + * 93[7:6] = 10 reg_cbusdisc_pup_sel[1:0] should be + * set for 10k (default) + * 93[5:4] = 00 reg_cbusidle_pup_sel[1:0] = open (default) + */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL3_REG, ~0, 0x86); + /* change from CC to 8C to match 5K */ + /*To meet CTS 3.3.72 spec */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL4_REG, ~0, 0x8C); + /* Configure the interrupt as active high */ + mhl_tx_writebm(sii9234, MHL_TX_INT_CTRL_REG, 0, 0x06); + + msleep(25); + + /* release usb_id switch */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL6_REG, 0, USB_ID_OVR); + mhl_tx_writeb(sii9234, MHL_TX_DISC_CTRL1_REG, 0x27); + + ret = sii9234_clear_error(sii9234); + if (ret < 0) + return ret; + ret = sii9234_cbus_init(sii9234); + if (ret < 0) + return ret; + + /* Enable Auto soft reset on SCDT = 0 */ + mhl_tx_writeb(sii9234, 0x05, 0x04); + /* HDMI Transcode mode enable */ + mhl_tx_writeb(sii9234, 0x0D, 0x1C); + mhl_tx_writeb(sii9234, MHL_TX_INTR4_ENABLE_REG, + RGND_READY_MASK | CBUS_LKOUT_MASK | + MHL_DISC_FAIL_MASK | MHL_EST_MASK); + mhl_tx_writeb(sii9234, MHL_TX_INTR1_ENABLE_REG, 0x60); + + /* this point is very importand before megsure RGND impedance */ + force_usb_id_switch_open(sii9234); + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL4_REG, 0, 0xF0); + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL5_REG, 0, 0x03); + release_usb_id_switch_open(sii9234); + /*end of this */ + + /* Force upstream HPD to 0 when not in MHL mode */ + mhl_tx_writebm(sii9234, MHL_TX_INT_CTRL_REG, 0, 1 << 5); + mhl_tx_writebm(sii9234, MHL_TX_INT_CTRL_REG, ~0, 1 << 4); + + return sii9234_clear_error(sii9234); +} + +static int sii9234_goto_d3(struct sii9234 *sii9234) +{ + int ret; + struct device *dev = sii9234_dev(sii9234); + + dev_dbg(dev, "sii9234: detection started d3\n"); + + ret = sii9234_reset(sii9234); + if (ret < 0) + goto exit; + + hdmi_writeb(sii9234, 0x01, 0x03); + tpi_writebm(sii9234, TPI_DPD_REG, 0, 1); + /* I2C above is expected to fail because power goes down */ + sii9234_clear_error(sii9234); + + sii9234->state = ST_D3; + + return 0; + exit: + dev_err(dev, "sii9234_goto_d3() failed\n"); + return -1; +} + +#define sii9234_hw_on(sii9234) \ + regulator_enable((sii9234)->vcc_supply) + +static void sii9234_hw_off(struct sii9234 *sii9234) +{ + gpio_direction_output(sii9234->gpio_n_reset, 0); + usleep_range(10000, 20000); + gpio_direction_output(sii9234->gpio_n_reset, 1); + regulator_disable(sii9234->vcc_supply); + gpio_direction_output(sii9234->gpio_n_reset, 0); +} + +static void sii9234_hw_reset(struct sii9234 *sii9234) +{ + gpio_direction_output(sii9234->gpio_n_reset, 0); + usleep_range(10000, 20000); + gpio_direction_output(sii9234->gpio_n_reset, 1); +} + +static void sii9234_cable_in(struct sii9234 *sii9234) +{ + int ret; + + mutex_lock(&sii9234->lock); + if (sii9234->state != ST_OFF) + goto unlock; + ret = sii9234_hw_on(sii9234); + if (ret < 0) + goto unlock; + + sii9234_hw_reset(sii9234); + sii9234_goto_d3(sii9234); + enable_irq(sii9234->irq); + +unlock: + mutex_unlock(&sii9234->lock); +} + +static void sii9234_cable_out(struct sii9234 *sii9234) +{ + mutex_lock(&sii9234->lock); + + if (sii9234->state == ST_OFF) + goto unlock; + + disable_irq_nosync(sii9234->irq); + tpi_writeb(sii9234, TPI_DPD_REG, 0); + /*turn on&off hpd festure for only QCT HDMI */ + sii9234_hw_off(sii9234); + + sii9234->state = ST_OFF; + +unlock: + mutex_unlock(&sii9234->lock); +} + +static enum sii9234_state sii9234_rgnd_ready_irq(struct sii9234 *sii9234) +{ + int value; + struct device *dev = sii9234_dev(sii9234); + + if (sii9234->state == ST_D3) { + int ret; + + dev_dbg(dev, "RGND_READY_INT\n"); + sii9234_hw_reset(sii9234); + + ret = sii9234_reset(sii9234); + if (ret < 0) { + dev_err(dev, "sii9234_reset() failed\n"); + return ST_FAILURE; + } + + return ST_RGND_INIT; + } + + /* got interrupt in inappropriate state */ + if (sii9234->state != ST_RGND_INIT) + return ST_FAILURE; + + value = mhl_tx_readb(sii9234, MHL_TX_STAT2_REG); + if (sii9234_clear_error(sii9234)) + return ST_FAILURE; + + if ((value & RGND_INTP_MASK) != RGND_INTP_1K) { + dev_warn(dev, "RGND is not 1k\n"); + return ST_RGND_INIT; + } + dev_dbg(dev, "RGND 1K!!\n"); + /* After applying RGND patch, there is some issue + about discovry failure + This point is add to fix that problem */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL4_REG, ~0, 0x8C); + mhl_tx_writeb(sii9234, MHL_TX_DISC_CTRL5_REG, 0x77); + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL6_REG, ~0, 0x05); + if (sii9234_clear_error(sii9234)) + return ST_FAILURE; + + usleep_range(T_SRC_VBUS_CBUS_TO_STABLE * USEC_PER_MSEC, + T_SRC_VBUS_CBUS_TO_STABLE * USEC_PER_MSEC); + + return ST_RGND_1K; +} + +static enum sii9234_state sii9234_mhl_established(struct sii9234 *sii9234) +{ + dev_dbg(sii9234_dev(sii9234), "mhl est interrupt\n"); + + /* discovery override */ + mhl_tx_writeb(sii9234, MHL_TX_MHLTX_CTL1_REG, 0x10); + /* increase DDC translation layer timer (byte mode) */ + cbus_writeb(sii9234, 0x07, 0x32); + cbus_writebm(sii9234, 0x44, ~0, 1 << 1); + /* Keep the discovery enabled. Need RGND interrupt */ + mhl_tx_writebm(sii9234, MHL_TX_DISC_CTRL1_REG, ~0, 1); + mhl_tx_writeb(sii9234, MHL_TX_INTR1_ENABLE_REG, + RSEN_CHANGE_INT_MASK | HPD_CHANGE_INT_MASK); + + if (sii9234_clear_error(sii9234)) + return ST_FAILURE; + + return ST_MHL_ESTABLISHED; +} + +static enum sii9234_state sii9234_hpd_change(struct sii9234 *sii9234) +{ + int value; + + value = cbus_readb(sii9234, CBUS_MSC_REQ_ABORT_REASON_REG); + if (sii9234_clear_error(sii9234)) + return ST_FAILURE; + + if (value & SET_HPD_DOWNSTREAM) { + dev_info(sii9234_dev(sii9234), "HPD High\n"); + /* Downstream HPD High, Enable TMDS */ + sii9234_tmds_control(sii9234, true); + /*turn on&off hpd festure for only QCT HDMI */ + } else { + dev_info(sii9234_dev(sii9234), "HPD Low\n"); + /* Downstream HPD Low, Disable TMDS */ + sii9234_tmds_control(sii9234, false); + } + + return sii9234->state; +} + +static enum sii9234_state sii9234_rsen_change(struct sii9234 *sii9234) +{ + int value; + struct device *dev = sii9234_dev(sii9234); + + /* work_around code to handle worng interrupt */ + if (sii9234->state != ST_RGND_1K) { + dev_err(dev, "RSEN_HIGH without RGND_1K\n"); + return ST_FAILURE; + } + value = mhl_tx_readb(sii9234, MHL_TX_SYSSTAT_REG); + if (value < 0) + return ST_FAILURE; + + if (value & RSEN_STATUS) { + dev_info(dev, "MHL cable connected.. RSEN High\n"); + return ST_RSEN_HIGH; + } + dev_info(dev, "RSEN lost\n"); + /* Once RSEN loss is confirmed,we need to check + * based on cable status and chip power status,whether + * it is SINK Loss(HDMI cable not connected, TV Off) + * or MHL cable disconnection + * TODO: Define the below mhl_disconnection() + */ + msleep(T_SRC_RXSENSE_DEGLITCH); + value = mhl_tx_readb(sii9234, MHL_TX_SYSSTAT_REG); + if (value < 0) + return ST_FAILURE; + dev_dbg(dev, "sys_stat: %x\n", value); + + if (value & RSEN_STATUS) { + dev_info(dev, "RSEN recovery\n"); + return ST_RSEN_HIGH; + } + dev_info(dev, "RSEN Really LOW\n"); + /*To meet CTS 3.3.22.2 spec */ + sii9234_tmds_control(sii9234, false); + force_usb_id_switch_open(sii9234); + release_usb_id_switch_open(sii9234); + + return ST_FAILURE; +} + +static irqreturn_t sii9234_irq_thread(int irq, void *data) +{ + struct sii9234 *sii9234 = data; + int intr1, intr4; + int intr1_en, intr4_en; + int cbus_intr1, cbus_intr2; + struct device *dev = sii9234_dev(sii9234); + + dev_dbg(dev, "%s\n", __func__); + + msleep(30); + + mutex_lock(&sii9234->lock); + + intr1 = mhl_tx_readb(sii9234, MHL_TX_INTR1_REG); + intr4 = mhl_tx_readb(sii9234, MHL_TX_INTR4_REG); + intr1_en = mhl_tx_readb(sii9234, MHL_TX_INTR1_ENABLE_REG); + intr4_en = mhl_tx_readb(sii9234, MHL_TX_INTR4_ENABLE_REG); + cbus_intr1 = cbus_readb(sii9234, CBUS_INT_STATUS_1_REG); + cbus_intr2 = cbus_readb(sii9234, CBUS_INT_STATUS_2_REG); + + if (sii9234_clear_error(sii9234)) + goto done; + + dev_dbg(dev, "irq %02x/%02x %02x/%02x %02x/%02x\n", + intr1, intr1_en, intr4, intr4_en, cbus_intr1, cbus_intr2); + + if (intr4 & RGND_READY_INT) + sii9234->state = sii9234_rgnd_ready_irq(sii9234); + if (intr1 & RSEN_CHANGE_INT) + sii9234->state = sii9234_rsen_change(sii9234); + if (intr4 & MHL_EST_INT) + sii9234->state = sii9234_mhl_established(sii9234); + if (intr1 & HPD_CHANGE_INT) + sii9234->state = sii9234_hpd_change(sii9234); + if (intr4 & CBUS_LKOUT_INT) + sii9234->state = ST_FAILURE; + if (intr4 & MHL_DISC_FAIL_INT) + sii9234->state = ST_FAILURE_DISCOVERY; + + done: + /* clean interrupt status and pending flags */ + mhl_tx_writeb(sii9234, MHL_TX_INTR1_REG, intr1); + mhl_tx_writeb(sii9234, MHL_TX_INTR4_REG, intr4); + cbus_writeb(sii9234, CBUS_MHL_STATUS_REG_0, 0xFF); + cbus_writeb(sii9234, CBUS_MHL_STATUS_REG_1, 0xFF); + cbus_writeb(sii9234, CBUS_INT_STATUS_1_REG, cbus_intr1); + cbus_writeb(sii9234, CBUS_INT_STATUS_2_REG, cbus_intr2); + + sii9234_clear_error(sii9234); + + if (sii9234->state == ST_FAILURE) { + dev_info(dev, "try to reset after failure\n"); + sii9234_hw_reset(sii9234); + sii9234_goto_d3(sii9234); + } + + if (sii9234->state == ST_FAILURE_DISCOVERY) { + dev_err(dev, "discovery failed, no power for MHL?\n"); + tpi_writebm(sii9234, TPI_DPD_REG, 0, 1); + sii9234->state = ST_D3; + } + + mutex_unlock(&sii9234->lock); + + return IRQ_HANDLED; +} + +static void sii9234_extcon_work(struct work_struct *work) +{ + struct sii9234 *sii9234 = + container_of(work, struct sii9234, extcon_wq); + + dev_info(sii9234_dev(sii9234), "MHL is %s\n", + sii9234->extcon_attached ? "attached" : "detached"); + + if (sii9234->extcon_attached) + sii9234_cable_in(sii9234); + else + sii9234_cable_out(sii9234); +} + +static int sii9234_extcon_notifier(struct notifier_block *self, + unsigned long event, void *ptr) +{ + struct sii9234 *sii9234 = + container_of(self, struct sii9234, extcon_nb); + + sii9234->extcon_attached = event; + schedule_work(&sii9234->extcon_wq); + + return NOTIFY_DONE; +} + +static int sii9234_extcon_init(struct sii9234 *sii9234) +{ + struct device *dev = &sii9234->client[I2C_MHL]->dev; + struct extcon_dev *edev; + int ret; + + if (of_property_read_bool(dev->of_node, "extcon")) { + edev = extcon_get_edev_by_phandle(dev, 0); + if (IS_ERR(edev)) { + dev_err(dev, "failed to acquire extcon device\n"); + return PTR_ERR(edev); + } + + sii9234->extcon_attached = extcon_get_cable_state(edev, "MHL"); + dev_info(dev, "extcon(MHL) = %d\n", sii9234->extcon_attached); + + sii9234->extcon_nb.notifier_call = sii9234_extcon_notifier; + ret = extcon_register_interest(&sii9234->extcon_dev, edev->name, + "MHL", &sii9234->extcon_nb); + + if (ret) { + dev_err(dev, "failed to register notifier for MHL\n"); + return ret; + } + INIT_WORK(&sii9234->extcon_wq, sii9234_extcon_work); + } else { + dev_info(dev, "no extcon found, switching to 'always on' mode\n"); + sii9234->extcon_attached = true; + } + return 0; +} + +static int sii9234_init_resources(struct sii9234 *sii9234, + struct i2c_client *client) +{ + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct device *dev = &client->dev; + int ret; + + if (!dev->of_node) { + dev_err(dev, "not DT device\n"); + return -ENODEV; + } + + sii9234->gpio_n_reset = of_get_named_gpio(dev->of_node, + "gpio-reset", 0); + if (!gpio_is_valid(sii9234->gpio_n_reset)) { + dev_err(dev, "failed to get gpio-reset from DT\n"); + return -ENODEV; + } + sii9234->gpio_int = of_get_named_gpio(dev->of_node, "gpio-int", 0); + if (!gpio_is_valid(sii9234->gpio_int)) { + dev_err(dev, "failed to get gpio-int from DT\n"); + return -ENODEV; + } + + ret = devm_gpio_request(dev, sii9234->gpio_n_reset, "MHL_RST"); + if (ret) { + dev_err(dev, "failed to acquire MHL_RST gpio\n"); + return ret; + } + + ret = devm_gpio_request(dev, sii9234->gpio_int, "MHL_INT"); + if (ret) { + dev_err(dev, "failed to request MHL_INT gpio\n"); + return ret; + } + + sii9234->vcc_supply = devm_regulator_get(dev, "vcc"); + if (IS_ERR(sii9234->vcc_supply)) { + dev_err(dev, "failed to acquire regulator vcc\n"); + return PTR_ERR(sii9234->vcc_supply); + } + + sii9234->client[I2C_MHL] = client; + + sii9234->client[I2C_TPI] = i2c_new_dummy(adapter, 0x7A >> 1); + if (!sii9234->client[I2C_TPI]) { + dev_err(dev, "failed to create TPI client\n"); + return -ENODEV; + } + + sii9234->client[I2C_HDMI] = i2c_new_dummy(adapter, 0x92 >> 1); + if (!sii9234->client[I2C_HDMI]) { + dev_err(dev, "failed to create HDMI RX client\n"); + goto fail_tpi; + } + + sii9234->client[I2C_CBUS] = i2c_new_dummy(adapter, 0xC8 >> 1); + if (!sii9234->client[I2C_CBUS]) { + dev_err(dev, "failed to create CBUS client\n"); + goto fail_hdmi; + } + + return 0; + +fail_hdmi: + i2c_unregister_device(sii9234->client[I2C_HDMI]); +fail_tpi: + i2c_unregister_device(sii9234->client[I2C_TPI]); + + return -ENODEV; +} + +static void sii9234_deinit_resources(struct sii9234 *sii9234) +{ + i2c_unregister_device(sii9234->client[I2C_CBUS]); + i2c_unregister_device(sii9234->client[I2C_HDMI]); + i2c_unregister_device(sii9234->client[I2C_TPI]); +} + +static int sii9234_mhl_tx_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct sii9234 *sii9234; + struct device *dev = &client->dev; + int ret; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(dev, "I2C adapter lacks SMBUS feature\n"); + return -EIO; + } + + sii9234 = devm_kzalloc(dev, sizeof(struct sii9234), GFP_KERNEL); + if (!sii9234) { + dev_err(dev, "not enough memory\n"); + return -ENOMEM; + } + + mutex_init(&sii9234->lock); + + ret = sii9234_init_resources(sii9234, client); + if (ret < 0) { + dev_err(&client->dev, "failed to initialize sii9234 resources\n"); + return ret; + } + ret = sii9234_hw_on(sii9234); + if (ret) { + dev_err(&client->dev, "failed to enable power\n"); + goto err_resource; + } + sii9234_hw_reset(sii9234); + + i2c_set_clientdata(client, sii9234); + + sii9234->irq = gpio_to_irq(sii9234->gpio_int); + ret = devm_request_threaded_irq(dev, sii9234->irq, NULL, + sii9234_irq_thread, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "sii9234", sii9234); + if (ret < 0) { + dev_err(dev, "failed to request MHL interrupt\n"); + goto err_hw_power; + } + + disable_irq(sii9234->irq); + + ret = sii9234_extcon_init(sii9234); + if (ret < 0) { + dev_err(dev, "failed to initialize EXTCON\n"); + goto err_hw_power; + } + + /* Force MHL connect EVENT for platforms with no EXTCON */ + if (sii9234->extcon_attached) + sii9234_cable_in(sii9234); + + return 0; + +err_hw_power: + sii9234_hw_off(sii9234); + +err_resource: + sii9234_deinit_resources(sii9234); + + return ret; +} + +static int sii9234_mhl_tx_i2c_remove(struct i2c_client *client) +{ + struct sii9234 *sii9234 = i2c_get_clientdata(client); + + extcon_unregister_interest(&sii9234->extcon_dev); + if (sii9234->extcon_attached) + sii9234_cable_out(sii9234); + sii9234_deinit_resources(sii9234); + + return 0; +} + +static const struct of_device_id sii9234_dt_match[] = { + { .compatible = "sil,sii9234" }, + { }, +}; +MODULE_DEVICE_TABLE(of, sii9234_dt_match); + +static const struct i2c_device_id sii9234_id[] = { + { "SII9234", 0 }, + { }, +}; + +MODULE_DEVICE_TABLE(i2c, sii9234_id); +static struct i2c_driver sii9234_driver = { + .driver = { + .name = "sii9234", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(sii9234_dt_match), + }, + .probe = sii9234_mhl_tx_i2c_probe, + .remove = sii9234_mhl_tx_i2c_remove, + .id_table = sii9234_id, +}; + +module_i2c_driver(sii9234_driver); +MODULE_LICENSE("GPL");