mx2_camera: Add soc_camera support for i.MX25/i.MX27

This is the soc_camera support developed by Sascha Hauer for the i.MX27.  Alan
Carvalho de Assis modified the original driver to get it working on more recent
kernels. I modified it further to add support for i.MX25. This driver has been
tested on i.MX25 and i.MX27 based platforms.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

5 files changed, 1575 insertions, 2 deletions

diff --git a/arch/arm/plat-mxc/include/mach/memory.h b/arch/arm/plat-mxc/include/mach/memory.h
index c4b40c35a6a1..564ec9dbc93d 100644
--- a/arch/arm/plat-mxc/include/mach/memory.h
+++ b/arch/arm/plat-mxc/include/mach/memory.h
@@ -44,12 +44,12 @@
  */
 #define CONSISTENT_DMA_SIZE SZ_8M
 
-#elif defined(CONFIG_MX1_VIDEO)
+#elif defined(CONFIG_MX1_VIDEO) || defined(CONFIG_VIDEO_MX2_HOSTSUPPORT)
 /*
  * Increase size of DMA-consistent memory region.
  * This is required for i.MX camera driver to capture at least four VGA frames.
  */
 #define CONSISTENT_DMA_SIZE SZ_4M
-#endif /* CONFIG_MX1_VIDEO */
+#endif /* CONFIG_MX1_VIDEO || CONFIG_VIDEO_MX2_HOSTSUPPORT */
 
 #endif /* __ASM_ARCH_MXC_MEMORY_H__ */
diff --git a/arch/arm/plat-mxc/include/mach/mx2_cam.h b/arch/arm/plat-mxc/include/mach/mx2_cam.h
new file mode 100644
index 000000000000..3c080a32dbf5
--- /dev/null
+++ b/arch/arm/plat-mxc/include/mach/mx2_cam.h
@@ -0,0 +1,46 @@
+/*
+ * mx2-cam.h - i.MX27/i.MX25 camera driver header file
+ *
+ * Copyright (C) 2003, Intel Corporation
+ * Copyright (C) 2008, Sascha Hauer <s.hauer@pengutronix.de>
+ * Copyright (C) 2010, Baruch Siach <baruch@tkos.co.il>
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __MACH_MX2_CAM_H_
+#define __MACH_MX2_CAM_H_
+
+#define MX2_CAMERA_SWAP16               (1 << 0)
+#define MX2_CAMERA_EXT_VSYNC            (1 << 1)
+#define MX2_CAMERA_CCIR                 (1 << 2)
+#define MX2_CAMERA_CCIR_INTERLACE       (1 << 3)
+#define MX2_CAMERA_HSYNC_HIGH           (1 << 4)
+#define MX2_CAMERA_GATED_CLOCK          (1 << 5)
+#define MX2_CAMERA_INV_DATA             (1 << 6)
+#define MX2_CAMERA_PCLK_SAMPLE_RISING   (1 << 7)
+#define MX2_CAMERA_PACK_DIR_MSB         (1 << 8)
+
+/**
+ * struct mx2_camera_platform_data - optional platform data for mx2_camera
+ * @flags: any combination of MX2_CAMERA_*
+ * @clk: clock rate of the csi block / 2
+ */
+struct mx2_camera_platform_data {
+        unsigned long flags;
+        unsigned long clk;
+};
+
+#endif /* __MACH_MX2_CAM_H_ */
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index ad9e6f9c22e9..cdbbbe491d1b 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -969,6 +969,19 @@ config VIDEO_OMAP2
         ---help---
           This is a v4l2 driver for the TI OMAP2 camera capture interface
 
+config VIDEO_MX2_HOSTSUPPORT
+        bool
+
+config VIDEO_MX2
+        tristate "i.MX27/i.MX25 Camera Sensor Interface driver"
+        depends on VIDEO_DEV && SOC_CAMERA && (MACH_MX27 || ARCH_MX25)
+        select VIDEOBUF_DMA_CONTIG
+        select VIDEO_MX2_HOSTSUPPORT
+        ---help---
+          This is a v4l2 driver for the i.MX27 and the i.MX25 Camera Sensor
+          Interface
+
+
 #
 # USB Multimedia device configuration
 #
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index cc93859d3164..b08bd2b65cd0 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -162,6 +162,7 @@ obj-$(CONFIG_SOC_CAMERA)		+= soc_camera.o soc_mediabus.o
 obj-$(CONFIG_SOC_CAMERA_PLATFORM)       += soc_camera_platform.o
 # soc-camera host drivers have to be linked after camera drivers
 obj-$(CONFIG_VIDEO_MX1)                 += mx1_camera.o
+obj-$(CONFIG_VIDEO_MX2)                 += mx2_camera.o
 obj-$(CONFIG_VIDEO_MX3)                 += mx3_camera.o
 obj-$(CONFIG_VIDEO_PXA27x)              += pxa_camera.o
 obj-$(CONFIG_VIDEO_SH_MOBILE_CEU)       += sh_mobile_ceu_camera.o
diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
new file mode 100644
index 000000000000..98c93faa0c8d
--- /dev/null
+++ b/drivers/media/video/mx2_camera.c
@@ -0,0 +1,1513 @@
+/*
+ * V4L2 Driver for i.MX27/i.MX25 camera host
+ *
+ * Copyright (C) 2008, Sascha Hauer, Pengutronix
+ * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/time.h>
+#include <linux/version.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/clk.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf-dma-contig.h>
+#include <media/soc_camera.h>
+#include <media/soc_mediabus.h>
+
+#include <linux/videodev2.h>
+
+#include <mach/mx2_cam.h>
+#ifdef CONFIG_MACH_MX27
+#include <mach/dma-mx1-mx2.h>
+#endif
+#include <mach/hardware.h>
+
+#include <asm/dma.h>
+
+#define MX2_CAM_DRV_NAME "mx2-camera"
+#define MX2_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5)
+#define MX2_CAM_DRIVER_DESCRIPTION "i.MX2x_Camera"
+
+/* reset values */
+#define CSICR1_RESET_VAL        0x40000800
+#define CSICR2_RESET_VAL        0x0
+#define CSICR3_RESET_VAL        0x0
+
+/* csi control reg 1 */
+#define CSICR1_SWAP16_EN        (1 << 31)
+#define CSICR1_EXT_VSYNC        (1 << 30)
+#define CSICR1_EOF_INTEN        (1 << 29)
+#define CSICR1_PRP_IF_EN        (1 << 28)
+#define CSICR1_CCIR_MODE        (1 << 27)
+#define CSICR1_COF_INTEN        (1 << 26)
+#define CSICR1_SF_OR_INTEN      (1 << 25)
+#define CSICR1_RF_OR_INTEN      (1 << 24)
+#define CSICR1_STATFF_LEVEL     (3 << 22)
+#define CSICR1_STATFF_INTEN     (1 << 21)
+#define CSICR1_RXFF_LEVEL(l)    (((l) & 3) << 19)       /* MX27 */
+#define CSICR1_FB2_DMA_INTEN    (1 << 20)               /* MX25 */
+#define CSICR1_FB1_DMA_INTEN    (1 << 19)               /* MX25 */
+#define CSICR1_RXFF_INTEN       (1 << 18)
+#define CSICR1_SOF_POL          (1 << 17)
+#define CSICR1_SOF_INTEN        (1 << 16)
+#define CSICR1_MCLKDIV(d)       (((d) & 0xF) << 12)
+#define CSICR1_HSYNC_POL        (1 << 11)
+#define CSICR1_CCIR_EN          (1 &l