staging/atomisp: Add support for the Intel IPU v2

This patch adds support for the Intel IPU v2 as found on Android and IoT
Baytrail-T and Baytrail-CR platforms (those with the IPU PCI mapped). You
will also need the firmware files from your device (Android usually puts
them into /etc) - or you can find them in the downloadable restore/upgrade
kits if you blew them away for some reason.

It may be possible to extend the driver to handle the BYT/T windows
platforms such as the ASUS T100TA. These platforms don't expose the IPU via
the PCI interface but via ACPI buried in the GPU description and with the
camera information somewhere unknown so would need a platform driver
interface adding to the codebase *IFF* the firmware works on such devices.

To get good results you also need a suitable support library such as
libxcam. The camera is intended to be driven from Android so it has a lot of
features that many desktop apps don't fully spport.

In theory all the pieces are there to build it with -DISP2401 and some
differing files to get CherryTrail/T support, but unifying the drivers
properlly is a work in progress.

The IPU driver represents the work of a lot of people within Intel over many
years. It's historical goal was portability rather than Linux upstream. Any
queries about the upstream aimed driver should be sent to me not to the
original authors.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 129 insertions, 0 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion.host.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion.host.c
new file mode 100644
index 0000000..8f25ee1
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion.host.c
@@ -0,0 +1,36 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 "ia_css_types.h"
+#include "ia_css_conversion.host.h"
+
+const struct ia_css_conversion_config default_conversion_config = {
+	0,
+	0,
+	0,
+	0,
+};
+
+void
+ia_css_conversion_encode(
+	struct sh_css_isp_conversion_params *to,
+	const struct ia_css_conversion_config *from,
+	unsigned size)
+{
+	(void)size;
+	to->en     = from->en;
+	to->dummy0 = from->dummy0;
+	to->dummy1 = from->dummy1;
+	to->dummy2 = from->dummy2;
+}
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion.host.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion.host.h
new file mode 100644
index 0000000..da7a0a0
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion.host.h
@@ -0,0 +1,33 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 __IA_CSS_CONVERSION_HOST_H
+#define __IA_CSS_CONVERSION_HOST_H
+
+#include "ia_css_conversion_types.h"
+#include "ia_css_conversion_param.h"
+
+extern const struct ia_css_conversion_config default_conversion_config;
+
+void
+ia_css_conversion_encode(
+	struct sh_css_isp_conversion_params *to,
+	const struct ia_css_conversion_config *from,
+	unsigned size);
+
+#ifdef ISP2401
+/* workaround until code generation in isp_kernelparameters.host.c is fixed */
+#define ia_css_conversion_par_encode(to, from, size) ia_css_conversion_encode(to, from, size)
+#endif
+#endif /* __IA_CSS_CONVERSION_HOST_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion_param.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion_param.h
new file mode 100644
index 0000000..301d506
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion_param.h
@@ -0,0 +1,28 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 __IA_CSS_CONVERSION_PARAM_H
+#define __IA_CSS_CONVERSION_PARAM_H
+
+#include "type_support.h"
+
+/* CONVERSION */
+struct sh_css_isp_conversion_params {
+	uint32_t en;
+	uint32_t dummy0;
+	uint32_t dummy1;
+	uint32_t dummy2;
+};
+
+#endif /* __IA_CSS_CONVERSION_PARAM_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion_types.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion_types.h
new file mode 100644
index 0000000..3f11442
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/conversion/conversion_1.0/ia_css_conversion_types.h
@@ -0,0 +1,32 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 __IA_CSS_CONVERSION_TYPES_H
+#define __IA_CSS_CONVERSION_TYPES_H
+
+/**
+ *  Conversion Kernel parameters.
+ *  Deinterleave bayer quad into isys format
+ *
+ *  ISP block: CONVERSION
+ *
+ */
+struct ia_css_conversion_config {
+	uint32_t en;     /**< en parameter */
+	uint32_t dummy0; /**< dummy0 dummy parameter 0 */
+	uint32_t dummy1; /**< dummy1 dummy parameter 1 */
+	uint32_t dummy2; /**< dummy2 dummy parameter 2 */
+};
+
+#endif /* __IA_CSS_CONVERSION_TYPES_H */