misc: Add IHS FPGA driver

Add a driver for gdsys IHS (Integrated Hardware Systems) FPGAs, which
supports initialization of the FPGA, as well as information gathering.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>

4 files changed, 926 insertions, 0 deletions

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index d589f32a55..48febc47d2 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -320,4 +320,13 @@ config GDSYS_SOC
           IHS (Integrated Hardware Systems) FPGA, which holds all devices whose
           register maps are contained within the FPGA's register map.
 
+config IHS_FPGA
+        bool "Enable IHS FPGA driver"
+        depends on MISC
+        help
+          Support IHS (Integrated Hardware Systems) FPGA, the main FPGAs on
+          gdsys devices, which supply the majority of the functionality offered
+          by the devices. This driver supports both CON and CPU variants of the
+          devices, depending on the device tree entry.
+
 endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 4a5a18675a..302d441592 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_GDSYS_IOEP) += gdsys_ioep.o
 obj-$(CONFIG_GDSYS_RXAUI_CTRL) += gdsys_rxaui_ctrl.o
 obj-$(CONFIG_GDSYS_SOC) += gdsys_soc.o
 obj-$(CONFIG_$(SPL_)I2C_EEPROM) += i2c_eeprom.o
+obj-$(CONFIG_IHS_FPGA) += ihs_fpga.o
 obj-$(CONFIG_IMX8) += imx8/
 obj-$(CONFIG_LED_STATUS) += status_led.o
 obj-$(CONFIG_LED_STATUS_GPIO) += gpio_led.o
diff --git a/drivers/misc/ihs_fpga.c b/drivers/misc/ihs_fpga.c
new file mode 100644
index 0000000000..f9e4b27a27
--- /dev/null
+++ b/drivers/misc/ihs_fpga.c
@@ -0,0 +1,867 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2017
+ * Mario Six,  Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ *
+ * based on the ioep-fpga driver, which is
+ *
+ * (C) Copyright 2014
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <regmap.h>
+#include <asm/gpio.h>
+
+#include "ihs_fpga.h"
+
+/**
+ * struct ihs_fpga_priv - Private data structure for IHS FPGA driver
+ * @map:        Register map for the FPGA's own register space
+ * @reset_gpio: GPIO to start FPGA reconfiguration
+ * @done_gpio:  GPOI to read the 'ready' status of the FPGA
+ */
+struct ihs_fpga_priv {
+        struct regmap *map;
+        struct gpio_desc reset_gpio;
+        struct gpio_desc done_gpio;
+};
+
+/* Test pattern for reflection test */
+const u16 REFLECTION_TESTPATTERN = 0xdead;
+/* Delay (in ms) for each round in the reflection test */
+const uint REFLECTION_TEST_DELAY = 100;
+/* Maximum number of rounds in the reflection test */
+const uint REFLECTION_TEST_ROUNDS = 5;
+/* Delay (in ms) for each round waiting for the FPGA's done GPIO */
+const uint FPGA_DONE_WAIT_DELAY = 100;
+/* Maximum number of rounds for waiting for the FPGA's done GPIO */
+const uint FPGA_DONE_WAIT_ROUND = 5;
+
+/**
+ * enum pcb_video_type - Video type of the PCB
+ * @PCB_DVI_SL:     Video type is DVI single-link
+ * @PCB_DP_165MPIX: Video type is DisplayPort (165Mpix)
+ * @PCB_DP_300MPIX: Video type is DisplayPort (300Mpix)
+ * @PCB_HDMI:       Video type is HDMI
+ * @PCB_DP_1_2:     Video type is DisplayPort 1.2
+ * @PCB_HDMI_2_0:   Video type is HDMI 2.0
+ */
+enum pcb_video_type {
+        PCB_DVI_SL,
+        PCB_DP_165MPIX,
+        PCB_DP_300MPIX,
+        PCB_HDMI,
+        PCB_DP_1_2,
+        PCB_HDMI_2_0,
+};
+
+/**
+ * enum pcb_transmission_type - Transmission type of the PCB
+ * @PCB_CAT_1G:    Transmission type is 1G Ethernet
+ * @PCB_FIBER_3G:  Transmission type is 3G Fiber
+ * @PCB_CAT_10G:   Transmission type is 10G Ethernet
+ * @PCB_FIBER_10G: Transmission type is 10G Fiber
+ */
+enum pcb_transmission_type {
+        PCB_CAT_1G,
+        PCB_FIBER_3G,
+        PCB_CAT_10G,
+        PCB_FIBER_10G,
+};
+
+/**
+ * enum carrier_speed - Speed of the FPGA's carrier
+ * @CARRIER_SPEED_1G:   The carrier speed is 1G
+ * @CARRIER_SPEED_2_5G: The carrier speed is 2.5G
+ * @CARRIER_SPEED_3G:   The carrier speed is 3G
+ * @CARRIER_SPEED_10G:  The carrier speed is 10G
+ */
+enum carrier_speed {
+        CARRIER_SPEED_1G,
+        CARRIER_SPEED_3G,
+        CARRIER_SPEED_2_5G = CARRIER_SPEED_3G,
+        CARRIER_SPEED_10G,
+};
+
+/**
+ * enum ram_config - FPGA's RAM configuration
+ * @RAM_DDR2_32BIT_295MBPS:  DDR2 32 bit at 295Mb/s
+ * @RAM_DDR3_32BIT_590MBPS:  DDR3 32 bit at 590Mb/s
+ * @RAM_DDR3_48BIT_590MBPS:  DDR3 48 bit at 590Mb/s
+ * @RAM_DDR3_64BIT_1800MBPS: DDR3 64 bit at 1800Mb/s
+ * @RAM_DDR3_48BIT_1800MBPS: DDR3 48 bit at 1800Mb/s
+ */
+enum ram_config {
+        RAM_DDR2_32BIT_295MBPS,
+        RAM_DDR3_32BIT_590MBPS,
+        RAM_DDR3_48BIT_590MBPS,
+        RAM_DDR3_64BIT_1800MBPS,
+        RAM_DDR3_48BIT_1800MBPS,
+};
+
+/**
+ * enum sysclock - Speed of the FPGA's system clock
+ * @SYSCLK_147456: System clock is 147.456 MHz
+ */
+enum sysclock {
+        SYSCLK_147456,
+};
+
+/**
+ * struct fpga_versions - Data read from the versions register
+ * @video_channel:         Is the FPGA for a video channel (true) or main
+ *                         channel (false) device?
+ * @con_side:              Is the FPGA for a CON (true) or a CPU (false) device?
+ * @pcb_video_type:        Defines for whch video type the FPGA is configured
+ * @pcb_transmission_type: Defines for which transmission type the FPGA is
+ *                         configured
+ * @hw_version:            Hardware version of the FPGA
+ */
+struct fpga_versions {
+        bool video_channel;
+        bool con_side;
+        enum pcb_video_type pcb_video_type;
+        enum pcb_transmission_type pcb_transmission_type;
+        unsigned int hw_version;
+};
+
+/**
+ * struct fpga_features - Data read from the features register
+ * @video_channels:     Number of video channels supported
+ * @carriers:           Number of carrier channels supported
+ * @carrier_speed:      Speed of carriers
+ * @ram_config:         RAM configuration of FPGA
+ * @sysclock:           System clock speed of FPGA
+ * @pcm_tx:             Support for PCM transmission
+ * @pcm_rx:             Support for PCM reception
+ * @spdif_tx:           Support for SPDIF audio transmission
+ * @spdif_rx:           Support for SPDIF audio reception
+ * @usb2:               Support for transparent USB2.0
+ * @rs232:              Support for bidirectional RS232
+ * @compression_type1:  Support for compression type 1
+ * @compression_type2:  Support for compression type 2
+ * @compression_type3:  Support for compression type 3
+ * @interlace:          Support for interlace image formats
+ * @osd:                Support for a OSD
+ * @compression_pipes:  Number of compression pipes supported
+ */
+struct fpga_features {
+        u8 video_channels;
+        u8 carriers;
+        enum carrier_speed carrier_speed;
+        enum ram_config ram_config;
+        enum sysclock sysclock;
+        bool pcm_tx;
+        bool pcm_rx;
+        bool spdif_tx;
+        bool spdif_rx;
+        bool usb2;
+        bool rs232;
+        bool compression_type1;
+        bool compression_type2;
+        bool compression_type3;
+        bool interlace;
+        bool osd;
+        bool compression_pipes;
+};
+
+#ifdef CONFIG_SYS_FPGA_FLAVOR_GAZERBEAM
+
+/**
+ * get_versions() - Fill structure with info from version register.
+ * @dev:      FPGA device to be queried for information
+ * @versions: Pointer to the structure to fill with information from the
+ *            versions register
+ * Return: 0
+ */
+static int get_versions(struct udevice *dev, struct fpga_versions *versions)
+{
+        struct ihs_fpga_priv *priv = dev_get_priv(dev);
+        enum {
+                VERSIONS_FPGA_VIDEO_CHANNEL = BIT(12),
+                VERSIONS_FPGA_CON_SIDE = BIT(13),
+                VERSIONS_FPGA_SC = BIT(14),
+                VERSIONS_PCB_CON = BIT(9),
+                VERSIONS_PCB_SC = BIT(8),
+                VERSIONS_PCB_VIDEO_MASK = 0x3 << 6,
+                VERSIONS_PCB_VIDEO_DP_1_2 = 0x0 << 6,
+                VERSIONS_PCB_VIDEO_HDMI_2_0 = 0x1 << 6,
+                VERSIONS_PCB_TRANSMISSION_MASK = 0x3 << 4,
+                VERSIONS_PCB_TRANSMISSION_FIBER_10G = 0x0 << 4,
+                VERSIONS_PCB_TRANSMISSION_CAT_10G = 0x1 << 4,
+                VERSIONS_PCB_TRANSMISSION_FIBER_3G = 0x2 << 4,
+                VERSIONS_PCB_TRANSMISSION_CAT_1G = 0x3 << 4,
+                VERSIONS_HW_VER_MASK = 0xf << 0,
+        };
+        u16 raw_versions;
+
+        memset(versions, 0, sizeof(struct fpga_versions));
+
+        ihs_fpga_get(priv->map, versions, &raw_versions);
+
+        versions->video_channel = raw_versions & VERSIONS_FPGA_VIDEO_CHANNEL;
+        versions->con_side = raw_versions & VERSIONS_FPGA_CON_SIDE;
+
+        switch (raw_versions & VERSIONS_PCB_VIDEO_MASK) {
+        case VERSIONS_PCB_VIDEO_DP_1_2:
+                versions->pcb_video_type = PCB_DP_1_2;
+                break;
+
+        case VERSIONS_PCB_VIDEO_HDMI_2_0:
+                versions->pcb_video_type = PCB_HDMI_2_0;
+                break;
+        }
+
+        switch (raw_versions & VERSIONS_PCB_TRANSMISSION_MASK) {
+        case VERSIONS_PCB_TRANSMISSION_FIBER_10G:
+                versions->pcb_transmission_type = PCB_FIBER_10G;
+                break;
+
+        case VERSIONS_PCB_TRANSMISSION_CAT_10G:
+                versions->pcb_transmission_type = PCB_CAT_10G;
+                break;
+
+        case VERSIONS_PCB_TRANSMISSION_FIBER_3G:
+                versions->pcb_transmission_type = PCB_FIBER_3G;
+                break;
+
+        case VERSIONS_PCB_TRANSMISSION_CAT_1G:
+                versions->pcb_transmission_type = PCB_CAT_1G;
+                break;
+        }
+
+        versions->hw_version = raw_versions & VERSIONS_HW_VER_MASK;
+
+        return 0;
+}
+
+/**
+ * get_features() - Fill structure with info from features register.
+ * @dev:      FPGA device to be queried for information
+ * @features: Pointer to the structure to fill with information from the
+ *            features register
+ * Return: 0
+ */
+static int get_features(struct udevice *dev, struct fpga_features *features)
+{
+        struct ihs_fpga_priv *priv = dev_get_priv(dev);
+        enum {
+                FEATURE_SPDIF_RX = BIT(15),
+                FEATURE_SPDIF_TX = BIT(14),
+                FEATURE_PCM_RX = BIT(13),
+                FEATURE_PCM_TX = BIT(12),
+                FEATURE_RAM_MASK = GENMASK(11, 8),
+                FEATURE_RAM_DDR2_32BIT_295MBPS = 0x0 << 8,
+                FEATURE_RAM_DDR3_32BIT_590MBPS = 0x1 << 8,
+                FEATURE_RAM_DDR3_48BIT_590MBPS = 0x2 << 8,
+                FEATURE_RAM_DDR3_64BIT_1800MBPS = 0x3 << 8,
+                FEATURE_RAM_DDR3_48BIT_1800MBPS = 0x4 << 8,
+                FEATURE_CARRIER_SPEED_MASK = GENMASK(7, 6),
+                FEATURE_CARRIER_SPEED_1G = 0x0 << 6,
+                FEATURE_CARRIER_SPEED_2_5G = 0x1 << 6,
+                FEATURE_CARRIER_SPEED_10G = 0x2 << 6,
+                FEATURE_CARRIERS_MASK = GENMASK(5, 4),
+                FEATURE_CARRIERS_0 = 0x0 << 4,
+                FEATURE_CARRIERS_1 = 0x1 << 4,
+                FEATURE_CARRIERS_2 = 0x2 << 4,
+                FEATURE_CARRIERS_4 = 0x3 << 4,
+                FEATURE_USB2 = BIT(3),
+                FEATURE_VIDEOCHANNELS_MASK = GENMASK(2, 0),
+                FEATURE_VIDEOCHANNELS_0 = 0x0 << 0,
+                FEATURE_VIDEOCHANNELS_1 = 0x1 << 0,
+                FEATURE_VIDEOCHANNELS_1_1 = 0x2 << 0,
+                FEATURE_VIDEOCHANNELS_2 = 0x3 << 0,
+        };
+
+        enum {
+                EXT_FEATURE_OSD = BIT(15),
+                EXT_FEATURE_ETHERNET = BIT(9),
+                EXT_FEATURE_INTERLACE = BIT(8),
+                EXT_FEATURE_RS232 = BIT(7),
+                EXT_FEATURE_COMPRESSION_PERF_MASK = GENMASK(6, 4),
+                EXT_FEATURE_COMPRESSION_PERF_1X = 0x0 << 4,
+                EXT_FEATURE_COMPRESSION_PERF_2X = 0x1 << 4,
+                EXT_FEATURE_COMPRESSION_PERF_4X = 0x2 << 4,
+                EXT_FEATURE_COMPRESSION_TYPE1 = BIT(0),
+                EXT_FEATURE_COMPRESSION_TYPE2 = BIT(1),
+                EXT_FEATURE_COMPRESSION_TYPE3 = BIT(2),
+        };
+
+        u16 raw_features;
+        u16 raw_extended_features;
+
+        memset(features, 0, sizeof(struct fpga_features));
+
+        ihs_fpga_get(priv->map, features, &raw_features);
+        ihs_fpga_get(priv->map, extended_features, &raw_extended_features);
+
+        switch (raw_features & FEATURE_VIDEOCHANNELS_MASK) {
+        case FEATURE_VIDEOCHANNELS_0:
+                features->video_channels = 0;
+                break;
+
+        case FEATURE_VIDEOCHANNELS_1:
+                features->video_channels = 1;
+                break;
+
+        case FEATURE_VIDEOCHANNELS_1_1:
+        case FEATURE_VIDEOCHANNELS_2:
+                features->video_channels = 2;
+                break;
+        };
+
+        switch (raw_features & FEATURE_CARRIERS_MASK) {
+        case FEATURE_CARRIERS_0:
+                features->carriers = 0;
+                break;
+
+        case FEATURE_CARRIERS_1:
+                features->carriers = 1;
+                break;
+
+        case FEATURE_CARRIERS_2:
+                features->carriers = 2;
+                break;
+
+        case FEATURE_CARRIERS_4:
+                features->carriers = 4;
+                break;
+        }
+
+        switch (raw_features & FEATURE_CARRIER_SPEED_MASK) {
+        case FEATURE_CARRIER_SPEED_1G:
+                features->carrier_speed = CARRIER_SPEED_1G;
+                break;
+        case FEATURE_CARRIER_SPEED_2_5G:
+                features->carrier_speed = CARRIER_SPEED_2_5G;
+                break;
+        case FEATURE_CARRIER_SPEED_10G:
+                features->carrier_speed = CARRIER_SPEED_10G;
+                break;
+        }
+
+        switch (raw_features & FEATURE_RAM_MASK) {
+        case FEATURE_RAM_DDR2_32BIT_295MBPS:
+                features->ram_config = RAM_DDR2_32BIT_295MBPS;
+                break;
+
+        case FEATURE_RAM_DDR3_32BIT_590MBPS:
+                features->ram_config = RAM_DDR3_32BIT_590MBPS;
+                break;
+
+        case FEATURE_RAM_DDR3_48BIT_590MBPS:
+                features->ram_config = RAM_DDR3_48BIT_590MBPS;
+                break;
+
+        case FEATURE_RAM_DDR3_64BIT_1800MBPS:
+                features->ram_config = RAM_DDR3_64BIT_1800MBPS;
+                break;
+
+        case FEATURE_RAM_DDR3_48BIT_1800MBPS:
+                features->ram_config = RAM_DDR3_48BIT_1800MBPS;
+                break;
+        }
+
+        features->pcm_tx = raw_features & FEATURE_PCM_TX;
+        features->pcm_rx = raw_features & FEATURE_PCM_RX;
+        features->spdif_tx = raw_features & FEATURE_SPDIF_TX;
+        features->spdif_rx = raw_features & FEATURE_SPDIF_RX;
+        features->usb2 = raw_features & FEATURE_USB2;
+        features->rs232 = raw_extended_features & EXT_FEATURE_RS232;
+        features->compression_type1 = raw_extended_features &
+                                        EXT_FEATURE_COMPRESSION_TYPE1;
+        features->compression_type2 = raw_extended_features &
+                                        EXT_FEATURE_COMPRESSION_TYPE2;
+        features->compression_type3 = raw_extended_features &
+                                        EXT_FEATURE_COMPRESSION_TYPE3;
+        features->interlace = raw_extended_features & EXT_FEATURE_INTERLACE;
+        features->osd = raw_extended_features & EXT_FEATURE_OSD;
+        features->compression_pipes = raw_extended_features &
+                                        EXT_FEATURE_COMPRESSION_PERF_MASK;
+
+        return 0;
+}
+
+#else
+
+/**
+ * get_versions() - Fill structure with info from version register.
+ * @fpga:     Identifier of the FPGA device to be queried for information
+ * @versions: Pointer to the structure to fill with information from the
+ *            versions register
+ *
+ * This is the legacy version and should be considered deprecated for new
+ * devices.
+ *
+ * Return: 0
+ */
+static int get_versions(unsigned int fpga, struct fpga_versions *versions)
+{
+        enum {
+                /* HW version encoding is a mess, leave it for the moment */
+                VERSIONS_HW_VER_MASK = 0xf << 0,
+                VERSIONS_PIX_CLOCK_GEN_IDT8N3QV01 = BIT(4),
+                VERSIONS_SFP = BIT(5),
+                VERSIONS_VIDEO_MASK = 0x7 << 6,
+                VERSIONS_VIDEO_DVI = 0x0 << 6,
+                VERSIONS_VIDEO_DP_165 = 0x1 << 6,
+                VERSIONS_VIDEO_DP_300 = 0x2 << 6,
+                VERSIONS_VIDEO_HDMI = 0x3 << 6,
+                VERSIONS_UT_MASK = 0xf << 12,
+                VERSIONS_UT_MAIN_SERVER = 0x0 << 12,
+                VERSIONS_UT_MAIN_USER = 0x1 << 12,
+                VERSIONS_UT_VIDEO_SERVER = 0x2 << 12,
+                VERSIONS_UT_VIDEO_USER = 0x3 << 12,
+        };
+        u16 raw_versions;
+
+        memset(versions, 0, sizeof(struct fpga_versions));
+
+        FPGA_GET_REG(fpga, versions, &raw_versions);
+
+        switch (raw_versions & VERSIONS_UT_MASK) {
+        case VERSIONS_UT_MAIN_SERVER:
+                versions->video_channel = false;
+                versions->con_side = false;
+                break;
+
+        case VERSIONS_UT_MAIN_USER:
+                versions->video_channel = false;
+                versions->con_side = true;
+                break;
+
+        case VERSIONS_UT_VIDEO_SERVER:
+                versions->video_channel = true;
+                versions->con_side = false;
+                break;
+
+        case VERSIONS_UT_VIDEO_USER:
+                versions->video_channel = true;
+                versions->con_side = true;
+                break;
+        }
+
+        switch (raw_versions & VERSIONS_VIDEO_MASK) {
+        case VERSIONS_VIDEO_DVI:
+                versions->pcb_video_type = PCB_DVI_SL;
+                break;
+
+        case VERSIONS_VIDEO_DP_165:
+                versions->pcb_video_type = PCB_DP_165MPIX;
+                break;
+
+        case VERSIONS_VIDEO_DP_300:
+                versions->pcb_video_type = PCB_DP_300MPIX;
+                break;
+
+        case VERSIONS_VIDEO_HDMI:
+                versions->pcb_video_type = PCB_HDMI;
+                break;
+        }
+
+        versions->hw_version = raw_versions & VERSIONS_HW_VER_MASK;
+
+        if (raw_versions & VERSIONS_SFP)
+                versions->pcb_transmission_type = PCB_FIBER_3G;
+        else
+                versions->pcb_transmission_type = PCB_CAT_1G;
+
+        return 0;
+}
+
+/**
+ * get_features() - Fill structure with info from features register.
+ * @fpga:     Identifier of the FPGA device to be queried for information
+ * @features: Pointer to the structure to fill with information from the
+ *            features register
+ *
+ * This is the legacy version and should be considered deprecated for new
+ * devices.
+ *
+ * Return: 0
+ */
+static int get_features(unsigned int fpga, struct fpga_features *features)
+{
+        enum {
+                FEATURE_CARRIER_SPEED_2_5 = BIT(4),
+                FEATURE_RAM_MASK = 0x7 << 5,
+                FEATURE_RAM_DDR2_32BIT = 0x0 << 5,
+                FEATURE_RAM_DDR3_32BIT = 0x1 << 5,
+                FEATURE_RAM_DDR3_48BIT = 0x2 << 5,
+                FEATURE_PCM_AUDIO_TX = BIT(9),
+                FEATURE_PCM_AUDIO_RX = BIT(10),
+                FEATURE_OSD = BIT(11),
+                FEATURE_USB20 = BIT(12),
+                FEATURE_COMPRESSION_MASK = 7 << 13,
+                FEATURE_COMPRESSION_TYPE1 = 0x1 << 13,
+                FEATURE_COMPRESSION_TYPE1_TYPE2 = 0x3 << 13,
+                FEATURE_COMPRESSION_TYPE1_TYPE2_TYPE3 = 0x7 << 13,
+        };
+
+        enum {
+                EXTENDED_FEATURE_SPDIF_AUDIO_TX = BIT(0),
+                EXTENDED_FEATURE_SPDIF_AUDIO_RX = BIT(1),
+                EXTENDED_FEATURE_RS232 = BIT(2),
+                EXTENDED_FEATURE_COMPRESSION_PIPES = BIT(3),
+                EXTENDED_FEATURE_INTERLACE = BIT(4),
+        };
+
+        u16 raw_features;
+        u16 raw_extended_features;
+
+        memset(features, 0, sizeof(struct fpga_features));
+
+        FPGA_GET_REG(fpga, fpga_features, &raw_features);
+        FPGA_GET_REG(fpga, fpga_ext_features, &raw_extended_features);
+
+        features->video_channels = raw_features & 0x3;
+        features->carriers = (raw_features >> 2) & 0x3;
+
+        features->carrier_speed = (raw_features & FEATURE_CARRIER_SPEED_2_5)
+                ? CARRIER_SPEED_2_5G : CARRIER_SPEED_1G;
+
+        switch (raw_features & FEATURE_RAM_MASK) {
+        case FEATURE_RAM_DDR2_32BIT:
+                features->ram_config = RAM_DDR2_32BIT_295MBPS;
+                break;
+
+        case FEATURE_RAM_DDR3_32BIT:
+                features->ram_config = RAM_DDR3_32BIT_590MBPS;
+                break;
+
+        case FEATURE_RAM_DDR3_48BIT:
+                features->ram_config = RAM_DDR3_48BIT_590MBPS;
+                break;
+        }
+
+        features->pcm_tx = raw_features & FEATURE_PCM_AUDIO_TX;
+        features->pcm_rx = raw_features & FEATURE_PCM_AUDIO_RX;
+        features->spdif_tx = raw_extended_features &
+                                EXTENDED_FEATURE_SPDIF_AUDIO_TX;
+        features->spdif_rx = raw_extended_features &
+                                EXTENDED_FEATURE_SPDIF_AUDIO_RX;
+
+        features->usb2 = raw_features & FEATURE_USB20;
+        features->rs232 = raw_extended_features & EXTENDED_FEATURE_RS232;
+
+        features->compression_type1 = false;
+        features->compression_type2 = false;
+        features->compression_type3 = false;
+        switch (raw_features & FEATURE_COMPRESSION_MASK) {
+        case FEATURE_COMPRESSION_TYPE1_TYPE2_TYPE3:
+                features->compression_type3 = true;
+                /* fall-through */
+        case FEATURE_COMPRESSION_TYPE1_TYPE2:
+                features->compression_type2 = true;
+                /* fall-through */
+        case FEATURE_COMPRESSION_TYPE1:
+                features->compression_type1 = true;
+                break;
+        }
+
+        features->interlace = raw_extended_features &
+                                EXTENDED_FEATURE_INTERLACE;
+        features->osd = raw_features & FEATURE_OSD;
+        features->compression_pipes = raw_extended_features &
+                                        EXTENDED_FEATURE_COMPRESSION_PIPES;
+
+        return 0;
+}
+
+#endif
+
+/**
+ * fpga_print_info() - Print information about FPGA device
+ * @dev: FPGA device to print information about
+ */
+static void fpga_print_info(struct udevice *dev)
+{
+        struct ihs_fpga_priv *priv = dev_get_priv(dev);
+        u16 fpga_version;
+        struct fpga_versions versions;
+        struct fpga_features features;
+
+        ihs_fpga_get(priv->map, fpga_version, &fpga_version);
+        get_versions(dev, &versions);
+        get_features(dev, &features);
+
+        if (versions.video_channel)
+                printf("Videochannel");
+        else
+                printf("Mainchannel");
+
+        if (versions.con_side)
+                printf(" User");
+        else
+                printf(" Server");
+
+        switch (versions.pcb_transmission_type) {
+        case PCB_CAT_1G:
+        case PCB_CAT_10G:
+                printf(" CAT");
+                break;
+        case PCB_FIBER_3G:
+        case PCB_FIBER_10G:
+                printf(" Fiber");
+                break;
+        };
+
+        switch (versions.pcb_video_type) {
+        case PCB_DVI_SL:
+                printf(" DVI,");
+                break;
+        case PCB_DP_165MPIX:
+                printf(" DP 165MPix/s,");
+                break;
+        case PCB_DP_300MPIX:
+                printf(" DP 300MPix/s,");
+                break;
+        case PCB_HDMI:
+                printf(" HDMI,");
+                break;
+        case PCB_DP_1_2:
+                printf(" DP 1.2,");
+                break;
+        case PCB_HDMI_2_0:
+                printf(" HDMI 2.0,");
+                break;
+        }
+
+        printf(" FPGA V %d.%02d\n       features: ",
+               fpga_version / 100, fpga_version % 100);
+
+        if (!features.compression_type1 &&
+            !features.compression_type2 &&
+            !features.compression_type3)
+                printf("no compression, ");
+
+        if (features.compression_type1)
+                printf("type1, ");
+
+        if (features.compression_type2)
+                printf("type2, ");
+
+        if (features.compression_type3)
+                printf("type3, ");
+
+        printf("%sosd", features.osd ? "" : "no ");
+
+        if (features.pcm_rx && features.pcm_tx)
+                printf(", pcm rx+tx");
+        else if (features.pcm_rx)
+                printf(", pcm rx");
+        else if (features.pcm_tx)
+                printf(", pcm tx");
+
+        if (features.spdif_rx && features.spdif_tx)
+                printf(", spdif rx+tx");
+        else if (features.spdif_rx)
+                printf(", spdif rx");
+        else if (features.spdif_tx)
+                printf(", spdif tx");
+
+        puts(",\n       ");
+
+        switch (features.sysclock) {
+        case SYSCLK_147456:
+                printf("clock 147.456 MHz");
+                break;
+        }
+
+        switch (features.ram_config) {
+        case RAM_DDR2_32BIT_295MBPS:
+                printf(", RAM 32 bit DDR2");
+                break;
+        case RAM_DDR3_32BIT_590MBPS:
+                printf(", RAM 32 bit DDR3");
+                break;
+        case RAM_DDR3_48BIT_590MBPS:
+        case RAM_DDR3_48BIT_1800MBPS:
+                printf(", RAM 48 bit DDR3");
+                break;
+        case RAM_DDR3_64BIT_1800MBPS:
+                printf(", RAM 64 bit DDR3");
+                break;
+        }
+
+        printf(", %d carrier(s)", features.carriers);
+
+        switch (features.carrier_speed) {
+        case CARRIER_SPEED_1G:
+                printf(", 1Gbit/s");
+                break;
+        case CARRIER_SPEED_3G:
+                printf(", 3Gbit/s");
+                break;
+        case CARRIER_SPEED_10G:
+                printf(", 10Gbit/s");
+                break;
+        }
+
+        printf(", %d video channel(s)\n", features.video_channels);
+}
+
+/**
+ * do_reflection_test() - Run reflection test on a FPGA device
+ * @dev: FPGA device to run reflection test on
+ *
+ * Return: 0 if reflection test succeeded, -ve on error
+ */
+static int do_reflection_test(struct udevice *dev)
+{
+        struct ihs_fpga_priv *priv = dev_get_priv(dev);
+        int ctr = 0;
+
+        while (1) {
+                u16 val;
+
+                ihs_fpga_set(priv->map, reflection_low, REFLECTION_TESTPATTERN);
+
+                ihs_fpga_get(priv->map, reflection_low, &val);
+                if (val == (~REFLECTION_TESTPATTERN & 0xffff))
+                        return -EIO;
+
+                mdelay(REFLECTION_TEST_DELAY);
+                if (ctr++ > REFLECTION_TEST_ROUNDS)
+                        return 0;
+        }
+}
+
+/**
+ * wait_for_fpga_done() - Wait until 'done'-flag is set for FPGA device
+ * @dev: FPGA device whose done flag to wait for
+ *
+ * This function waits until it detects that the done-GPIO's value was changed
+ * to 1 by the FPGA, which indicates that the device is configured and ready to
+ * use.
+ *
+ * Return: 0 if done flag was detected, -ve on error
+ */
+static int wait_for_fpga_done(struct udevice *dev)
+{
+        struct ihs_fpga_priv *priv = dev_get_priv(dev);
+        int ctr = 0;
+        int done_val;
+
+        while (1) {
+                done_val = dm_gpio_get_value(&priv->done_gpio);
+                if (done_val < 0) {
+                        debug("%s: Error while reading done-GPIO (err = %d)\n",
+                              dev->name, done_val);
+                        return done_val;
+                }
+
+                if (done_val)
+                        return 0;
+
+                mdelay(FPGA_DONE_WAIT_DELAY);
+                if (ctr++ > FPGA_DONE_WAIT_ROUND) {
+                        debug("%s: FPGA init failed (done not detected)\n",
+                              dev->name);
+                        return -EIO;
+                }
+        }
+}
+
+static int ihs_fpga_probe(struct udevice *dev)
+{
+        struct ihs_fpga_priv *priv = dev_get_priv(dev);
+        int ret;
+
+        /* TODO(mario.six@gdsys.cc): Case of FPGA attached to MCLink bus */
+
+        ret = regmap_init_mem(dev_ofnode(dev), &priv->map);
+        if (ret) {
+                debug("%s: Could not initialize regmap (err = %d)",
+                      dev->name, ret);
+                return ret;
+        }
+
+        ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset_gpio,
+                                   GPIOD_IS_OUT);
+        if (ret) {
+                debug("%s: Could not get reset-GPIO (err = %d)\n",
+                      dev->name, ret);
+                return ret;
+        }
+
+        if (!priv->reset_gpio.dev) {
+                debug("%s: Could not get reset-GPIO\n", dev->name);
+                return -ENOENT;
+        }
+
+        ret = gpio_request_by_name(dev, "done-gpios", 0, &priv->done_gpio,
+                                   GPIOD_IS_IN);
+        if (ret) {
+                debug("%s: Could not get done-GPIO (err = %d)\n",
+                      dev->name, ret);
+                return ret;
+        }
+
+        if (!priv->done_gpio.dev) {
+                debug("%s: Could not get done-GPIO\n", dev->name);
+                return -ENOENT;
+        }
+
+        ret = dm_gpio_set_value(&priv->reset_gpio, 1);
+        if (ret) {
+                debug("%s: Error while setting reset-GPIO (err = %d)\n",
+                      dev->name, ret);
+                return ret;
+        }
+
+        /* If FPGA already runs, don't initialize again */
+        if (do_reflection_test(dev))
+                goto reflection_ok;
+
+        ret = dm_gpio_set_value(&priv->reset_gpio, 0);
+        if (ret) {
+                debug("%s: Error while setting reset-GPIO (err = %d)\n",
+                      dev->name, ret);
+                return ret;
+        }
+
+        ret = wait_for_fpga_done(dev);
+        if (ret) {
+                debug("%s: Error while waiting for FPGA done (err = %d)\n",
+                      dev->name, ret);
+                return ret;
+        }
+
+        udelay(10);
+
+        ret = dm_gpio_set_value(&priv->reset_gpio, 1);
+        if (ret) {
+                debug("%s: Error while setting reset-GPIO (err = %d)\n",
+                      dev->name, ret);
+                return ret;
+        }
+
+        if (!do_reflection_test(dev)) {
+                debug("%s: Reflection test FAILED\n", dev->name);
+                return -EIO;
+        }
+
+reflection_ok:
+        printf("%s: Reflection test passed.\n", dev->name);
+
+        fpga_print_info(dev);
+
+        return 0;
+}
+
+static const struct udevice_id ihs_fpga_ids[] = {
+        { .compatible = "gdsys,iocon_fpga" },
+        { .compatible = "gdsys,iocpu_fpga" },
+        { }
+};
+
+U_BOOT_DRIVER(ihs_fpga_bus) = {
+        .name           = "ihs_fpga_bus",
+        .id             = UCLASS_MISC,
+        .of_match       = ihs_fpga_ids,
+        .probe          = ihs_fpga_probe,
+        .priv_auto_alloc_size = sizeof(struct ihs_fpga_priv),
+};
diff --git a/drivers/misc/ihs_fpga.h b/drivers/misc/ihs_fpga.h
new file mode 100644
index 0000000000..efb5dabb9c
--- /dev/null
+++ b/drivers/misc/ihs_fpga.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+/**
+ * struct ihs_fpga_regs - IHS FPGA register map structure
+ * @reflection_low:       Lower reflection register
+ * @versions:             PCB versions register
+ * @fpga_version:         FPGA versions register
+ * @features:             FPGA features register
+ * @extended_features:    FPGA extended features register
+ * @top_interrupt:        Top interrupt register
+ * @top_interrupt_enable: Top interrupt enable register
+ * @status:               FPGA status register
+ * @control:              FPGA control register
+ * @extended_control:     FPGA extended control register
+ */
+struct ihs_fpga_regs {
+        u16 reflection_low;
+        u16 versions;
+        u16 fpga_version;
+        u16 features;
+        u16 extended_features;
+        u16 top_interrupt;
+        u16 top_interrupt_enable;
+        u16 status;
+        u16 control;
+        u16 extended_control;
+};
+
+/**
+ * ihs_fpga_set() - Convenience macro to set values in FPGA register map
+ * @map:    Register map to set a value in
+ * @member: Name of member (described by ihs_fpga_regs) to set
+ * @val:    Value to set the member to
+ */
+#define ihs_fpga_set(map, member, val) \
+        regmap_set(map, struct ihs_fpga_regs, member, val)
+
+/**
+ * ihs_fpga_get() - Convenience macro to get values from FPGA register map
+ * @map:    Register map to read value from
+ * @member: Name of member (described by ihs_fpga_regs) to get
+ * @valp:   Pointe to variable to receive the value read
+ */
+#define ihs_fpga_get(map, member, valp) \
+        regmap_get(map, struct ihs_fpga_regs, member, valp)