[media] Driver for Toshiba TC358743 HDMI to CSI-2 bridge

The driver is tested on our hardware and all the implemented features
works as expected.

Missing features:
- CEC support
- HDCP repeater support
- IR support
Signed-off-by: NMats Randgaard <matrandg@cisco.com>
[hans.verkuil@cisco.com: updated copyright year to 2015]
[hans.verkuil@cisco.com: update confusing confctl_mutex comment]
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

MAINTAINERS

@@ -10319,6 +10319,13 @@ F:	drivers/char/toshiba.c
 F:	include/linux/toshiba.h
 F:	include/uapi/linux/toshiba.h
 
+TOSHIBA TC358743 DRIVER
+M:	Mats Randgaard <matrandg@cisco.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+F:	drivers/media/i2c/tc358743*
+F:	include/media/tc358743.h
+
 TMIO MMC DRIVER
 M:	Ian Molton <ian@mnementh.co.uk>
 L:	linux-mmc@vger.kernel.org

drivers/media/i2c/Kconfig

@@ -287,6 +287,15 @@ config VIDEO_SAA711X
 	  To compile this driver as a module, choose M here: the
 	  module will be called saa7115.
 
+config VIDEO_TC358743
+	tristate "Toshiba TC358743 decoder"
+	depends on VIDEO_V4L2 && I2C
+	---help---
+	  Support for the Toshiba TC358743 HDMI to MIPI CSI-2 bridge.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called tc358743.
+
 config VIDEO_TVP514X
 	tristate "Texas Instruments TVP514x video decoder"
 	depends on VIDEO_V4L2 && I2C

drivers/media/i2c/Makefile

@@ -78,3 +78,4 @@ obj-$(CONFIG_VIDEO_AK881X)		+= ak881x.o
 obj-$(CONFIG_VIDEO_IR_I2C)  += ir-kbd-i2c.o
 obj-$(CONFIG_VIDEO_ML86V7667)	+= ml86v7667.o
 obj-$(CONFIG_VIDEO_OV2659)	+= ov2659.o
+obj-$(CONFIG_VIDEO_TC358743)	+= tc358743.o

include/media/tc358743.h

+/*
+ * tc358743 - Toshiba HDMI to CSI-2 bridge
+ *
+ * Copyright 2015 Cisco Systems, Inc. and/or its affiliates. All rights
+ * reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+/*
+ * References (c = chapter, p = page):
+ * REF_01 - Toshiba, TC358743XBG (H2C), Functional Specification, Rev 0.60
+ * REF_02 - Toshiba, TC358743XBG_HDMI-CSI_Tv11p_nm.xls
+ */
+
+#ifndef _TC358743_
+#define _TC358743_
+
+enum tc358743_ddc5v_delays {
+	DDC5V_DELAY_0_MS,
+	DDC5V_DELAY_50_MS,
+	DDC5V_DELAY_100_MS,
+	DDC5V_DELAY_200_MS,
+};
+
+enum tc358743_hdmi_detection_delay {
+	HDMI_MODE_DELAY_0_MS,
+	HDMI_MODE_DELAY_25_MS,
+	HDMI_MODE_DELAY_50_MS,
+	HDMI_MODE_DELAY_100_MS,
+};
+
+struct tc358743_platform_data {
+	/* System clock connected to REFCLK (pin H5) */
+	u32 refclk_hz; /* 26 MHz, 27 MHz or 42 MHz */
+
+	/* DDC +5V debounce delay to avoid spurious interrupts when the cable
+	 * is connected.
+	 * Sets DDC5V_MODE in register DDC_CTL.
+	 * Default: DDC5V_DELAY_0_MS
+	 */
+	enum tc358743_ddc5v_delays ddc5v_delay;
+
+	bool enable_hdcp;
+
+	/*
+	 * The FIFO size is 512x32, so Toshiba recommend to set the default FIFO
+	 * level to somewhere in the middle (e.g. 300), so it can cover speed
+	 * mismatches in input and output ports.
+	 */
+	u16 fifo_level;
+
+	/* Bps pr lane is (refclk_hz / pll_prd) * pll_fbd */
+	u16 pll_prd;
+	u16 pll_fbd;
+
+	/* CSI
+	 * Calculate CSI parameters with REF_02 for the highest resolution your
+	 * CSI interface can handle. The driver will adjust the number of CSI
+	 * lanes in use according to the pixel clock.
+	 *
+	 * The values in brackets are calculated with REF_02 when the number of
+	 * bps pr lane is 823.5 MHz, and can serve as a starting point.
+	 */
+	u32 lineinitcnt;	/* (0x00001770) */
+	u32 lptxtimecnt;	/* (0x00000005) */
+	u32 tclk_headercnt;	/* (0x00001d04) */
+	u32 tclk_trailcnt;	/* (0x00000000) */
+	u32 ths_headercnt;	/* (0x00000505) */
+	u32 twakeup;		/* (0x00004650) */
+	u32 tclk_postcnt;	/* (0x00000000) */
+	u32 ths_trailcnt;	/* (0x00000004) */
+	u32 hstxvregcnt;	/* (0x00000005) */
+
+	/* DVI->HDMI detection delay to avoid unnecessary switching between DVI
+	 * and HDMI mode.
+	 * Sets HDMI_DET_V in register HDMI_DET.
+	 * Default: HDMI_MODE_DELAY_0_MS
+	 */
+	enum tc358743_hdmi_detection_delay hdmi_detection_delay;
+
+	/* Reset PHY automatically when TMDS clock goes from DC to AC.
+	 * Sets PHY_AUTO_RST2 in register PHY_CTL2.
+	 * Default: false
+	 */
+	bool hdmi_phy_auto_reset_tmds_detected;
+
+	/* Reset PHY automatically when TMDS clock passes 21 MHz.
+	 * Sets PHY_AUTO_RST3 in register PHY_CTL2.
+	 * Default: false
+	 */
+	bool hdmi_phy_auto_reset_tmds_in_range;
+
+	/* Reset PHY automatically when TMDS clock is detected.
+	 * Sets PHY_AUTO_RST4 in register PHY_CTL2.
+	 * Default: false
+	 */
+	bool hdmi_phy_auto_reset_tmds_valid;
+
+	/* Reset HDMI PHY automatically when hsync period is out of range.
+	 * Sets H_PI_RST in register HV_RST.
+	 * Default: false
+	 */
+	bool hdmi_phy_auto_reset_hsync_out_of_range;
+
+	/* Reset HDMI PHY automatically when vsync period is out of range.
+	 * Sets V_PI_RST in register HV_RST.
+	 * Default: false
+	 */
+	bool hdmi_phy_auto_reset_vsync_out_of_range;
+};
+
+/* custom controls */
+/* Audio sample rate in Hz */
+#define TC358743_CID_AUDIO_SAMPLING_RATE (V4L2_CID_USER_TC358743_BASE + 0)
+/* Audio present status */
+#define TC358743_CID_AUDIO_PRESENT       (V4L2_CID_USER_TC358743_BASE + 1)
+
+#endif

include/uapi/linux/v4l2-controls.h

@@ -174,6 +174,10 @@ enum v4l2_colorfx {
  * We reserve 16 controls for this driver. */
 #define V4L2_CID_USER_ADV7180_BASE		(V4L2_CID_USER_BASE + 0x1070)
 
+/* The base for the tc358743 driver controls.
+ * We reserve 16 controls for this driver. */
+#define V4L2_CID_USER_TC358743_BASE		(V4L2_CID_USER_BASE + 0x1080)
+
 /* MPEG-class control IDs */
 /* The MPEG controls are applicable to all codec controls
  * and the 'MPEG' part of the define is historical */