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, 167 insertions, 0 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane.host.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane.host.c
new file mode 100644
index 000000000000..d1fb4b116003
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane.host.c
@@ -0,0 +1,61 @@
+/*
+ * 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_frame.h"
+#include "ia_css_types.h"
+#include "sh_css_defs.h"
+#include "ia_css_debug.h"
+#include "assert_support.h"
+#define IA_CSS_INCLUDE_CONFIGURATIONS
+#include "ia_css_isp_configs.h"
+#include "isp.h"
+
+#include "ia_css_qplane.host.h"
+
+static const struct ia_css_qplane_configuration default_config = {
+	.pipe = (struct sh_css_sp_pipeline *)NULL,
+};
+
+void
+ia_css_qplane_config(
+	struct sh_css_isp_qplane_isp_config *to,
+	const struct ia_css_qplane_configuration  *from,
+	unsigned size)
+{
+	unsigned elems_a = ISP_VEC_NELEMS;
+
+	(void)size;
+	ia_css_dma_configure_from_info(&to->port_b, from->info);
+	to->width_a_over_b = elems_a / to->port_b.elems;
+
+	/* Assume divisiblity here, may need to generalize to fixed point. */
+	assert (elems_a % to->port_b.elems == 0);
+
+	to->inout_port_config = from->pipe->inout_port_config;
+	to->format = from->info->format;
+}
+
+void
+ia_css_qplane_configure(
+	const struct sh_css_sp_pipeline *pipe,
+	const struct ia_css_binary      *binary,
+	const struct ia_css_frame_info  *info)
+{
+	struct ia_css_qplane_configuration config = default_config;
+
+	config.pipe = pipe;
+	config.info = info;
+
+	ia_css_configure_qplane(binary, &config);
+}
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane.host.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane.host.h
new file mode 100644
index 000000000000..c41e9e5e0fd7
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane.host.h
@@ -0,0 +1,43 @@
+/*
+ * 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_QPLANE_HOST_H
+#define __IA_CSS_QPLANE_HOST_H
+
+#include <ia_css_frame_public.h>
+#include <ia_css_binary.h>
+
+#if 0
+/* Cannot be included, since sh_css_internal.h is too generic
+ * e.g. for FW generation.
+*/
+#include "sh_css_internal.h"	/* sh_css_sp_pipeline */
+#endif
+
+#include "ia_css_qplane_types.h"
+#include "ia_css_qplane_param.h"
+
+void
+ia_css_qplane_config(
+	struct sh_css_isp_qplane_isp_config      *to,
+	const struct ia_css_qplane_configuration *from,
+	unsigned size);
+
+void
+ia_css_qplane_configure(
+	const struct sh_css_sp_pipeline *pipe,
+	const struct ia_css_binary     *binary,
+	const struct ia_css_frame_info *from);
+
+#endif /* __IA_CSS_QPLANE_HOST_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane_param.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane_param.h
new file mode 100644
index 000000000000..5885f621de88
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane_param.h
@@ -0,0 +1,30 @@
+/*
+ * 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_QPLANE_PARAM_H
+#define __IA_CSS_QPLANE_PARAM_H
+
+#include <type_support.h>
+#include "dma.h"
+
+/* qplane channel */
+struct sh_css_isp_qplane_isp_config {
+	uint32_t width_a_over_b;
+	struct dma_port_config port_b;
+	uint32_t inout_port_config;
+	uint32_t input_needs_raw_binning;
+	uint32_t format; /* enum ia_css_frame_format */
+};
+
+#endif /* __IA_CSS_QPLANE_PARAM_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane_types.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane_types.h
new file mode 100644
index 000000000000..955fd472a241
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/qplane/qplane_2/ia_css_qplane_types.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_QPLANE_TYPES_H
+#define __IA_CSS_QPLANE_TYPES_H
+
+#include <ia_css_frame_public.h>
+#include "sh_css_internal.h"
+
+/** qplane frame
+ *
+ *  ISP block: qplane frame
+ */
+
+
+struct ia_css_qplane_configuration {
+	const struct sh_css_sp_pipeline *pipe;
+	const struct ia_css_frame_info  *info;
+};
+
+#endif /* __IA_CSS_QPLANE_TYPES_H */
+