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[media] Add the via framebuffer camera controller driver 

Add a driver for the video capture port on VIA integrated chipsets.  This
version has a remaining OLPCism or two and expects to be talking to an
ov7670; those can be improved as the need arises.

This work was supported by the One Laptop Per Child project.
Thanks to Laurent Pinchart for a number of useful comments.

Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jonathan Corbet 2010-10-19 21:32:11 -03:00 committed by Mauro Carvalho Chehab
parent dc4589c814
commit 024fafbac3
8 changed files with 1601 additions and 4 deletions
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10
drivers/media/video/Kconfig
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@ -712,6 +712,16 @@ config VIDEO_SR030PC30
---help---
This driver supports SR030PC30 VGA camera from Siliconfile
config VIDEO_VIA_CAMERA
tristate "VIAFB camera controller support"
depends on FB_VIA
select VIDEOBUF_DMA_SG
select VIDEO_OV7670
help
Driver support for the integrated camera controller in VIA
Chrome9 chipsets. Currently only tested on OLPC xo-1.5 systems
with ov7670 sensors.
config SOC_CAMERA
tristate "SoC camera support"
depends on VIDEO_V4L2 && HAS_DMA && I2C

2
drivers/media/video/Makefile
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@ -122,6 +122,8 @@ obj-$(CONFIG_VIDEO_CX2341X) += cx2341x.o
obj-$(CONFIG_VIDEO_CAFE_CCIC) += cafe_ccic.o
obj-$(CONFIG_VIDEO_VIA_CAMERA) += via-camera.o
obj-$(CONFIG_USB_DABUSB) += dabusb.o
obj-$(CONFIG_USB_SE401) += se401.o
obj-$(CONFIG_USB_ZR364XX) += zr364xx.o

1474
drivers/media/video/via-camera.c Normal file
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File diff suppressed because it is too large Load Diff

93
drivers/media/video/via-camera.h Normal file
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@ -0,0 +1,93 @@
/*
* VIA Camera register definitions.
*/
#define VCR_INTCTRL 0x300 /* Capture interrupt control */
#define VCR_IC_EAV 0x0001 /* End of active video status */
#define VCR_IC_EVBI 0x0002 /* End of VBI status */
#define VCR_IC_FBOTFLD 0x0004 /* "flipping" Bottom field is active */
#define VCR_IC_ACTBUF 0x0018 /* Active video buffer */
#define VCR_IC_VSYNC 0x0020 /* 0 = VB, 1 = active video */
#define VCR_IC_BOTFLD 0x0040 /* Bottom field is active */
#define VCR_IC_FFULL 0x0080 /* FIFO full */
#define VCR_IC_INTEN 0x0100 /* End of active video int. enable */
#define VCR_IC_VBIINT 0x0200 /* End of VBI int enable */
#define VCR_IC_VBIBUF 0x0400 /* Current VBI buffer */
#define VCR_TSC 0x308 /* Transport stream control */
#define VCR_TSC_ENABLE 0x000001 /* Transport stream input enable */
#define VCR_TSC_DROPERR 0x000002 /* Drop error packets */
#define VCR_TSC_METHOD 0x00000c /* DMA method (non-functional) */
#define VCR_TSC_COUNT 0x07fff0 /* KByte or packet count */
#define VCR_TSC_CBMODE 0x080000 /* Change buffer by byte count */
#define VCR_TSC_PSSIG 0x100000 /* Packet starting signal disable */
#define VCR_TSC_BE 0x200000 /* MSB first (serial mode) */
#define VCR_TSC_SERIAL 0x400000 /* Serial input (0 = parallel) */
#define VCR_CAPINTC 0x310 /* Capture interface control */
#define VCR_CI_ENABLE 0x00000001 /* Capture enable */
#define VCR_CI_BSS 0x00000002 /* WTF "bit stream selection" */
#define VCR_CI_3BUFS 0x00000004 /* 1 = 3 buffers, 0 = 2 buffers */
#define VCR_CI_VIPEN 0x00000008 /* VIP enable */
#define VCR_CI_CCIR601_8 0 /* CCIR601 input stream, 8 bit */
#define VCR_CI_CCIR656_8 0x00000010 /* ... CCIR656, 8 bit */
#define VCR_CI_CCIR601_16 0x00000020 /* ... CCIR601, 16 bit */
#define VCR_CI_CCIR656_16 0x00000030 /* ... CCIR656, 16 bit */
#define VCR_CI_HDMODE 0x00000040 /* CCIR656-16 hdr decode mode; 1=16b */
#define VCR_CI_BSWAP 0x00000080 /* Swap bytes (16-bit) */
#define VCR_CI_YUYV 0 /* Byte order 0123 */
#define VCR_CI_UYVY 0x00000100 /* Byte order 1032 */
#define VCR_CI_YVYU 0x00000200 /* Byte order 0321 */
#define VCR_CI_VYUY 0x00000300 /* Byte order 3012 */
#define VCR_CI_VIPTYPE 0x00000400 /* VIP type */
#define VCR_CI_IFSEN 0x00000800 /* Input field signal enable */
#define VCR_CI_DIODD 0 /* De-interlace odd, 30fps */
#define VCR_CI_DIEVEN 0x00001000 /* ...even field, 30fps */
#define VCR_CI_DIBOTH 0x00002000 /* ...both fields, 60fps */
#define VCR_CI_DIBOTH30 0x00003000 /* ...both fields, 30fps interlace */
#define VCR_CI_CONVTYPE 0x00004000 /* 4:2:2 to 4:4:4; 1 = interpolate */
#define VCR_CI_CFC 0x00008000 /* Capture flipping control */
#define VCR_CI_FILTER 0x00070000 /* Horiz filter mode select
000 = none
001 = 2 tap
010 = 3 tap
011 = 4 tap
100 = 5 tap */
#define VCR_CI_CLKINV 0x00080000 /* Input CLK inverted */
#define VCR_CI_VREFINV 0x00100000 /* VREF inverted */
#define VCR_CI_HREFINV 0x00200000 /* HREF inverted */
#define VCR_CI_FLDINV 0x00400000 /* Field inverted */
#define VCR_CI_CLKPIN 0x00800000 /* Capture clock pin */
#define VCR_CI_THRESH 0x0f000000 /* Capture fifo threshold */
#define VCR_CI_HRLE 0x10000000 /* Positive edge of HREF */
#define VCR_CI_VRLE 0x20000000 /* Positive edge of VREF */
#define VCR_CI_OFLDINV 0x40000000 /* Field output inverted */
#define VCR_CI_CLKEN 0x80000000 /* Capture clock enable */
#define VCR_HORRANGE 0x314 /* Active video horizontal range */
#define VCR_VERTRANGE 0x318 /* Active video vertical range */
#define VCR_AVSCALE 0x31c /* Active video scaling control */
#define VCR_AVS_HEN 0x00000800 /* Horizontal scale enable */
#define VCR_AVS_VEN 0x04000000 /* Vertical enable */
#define VCR_VBIHOR 0x320 /* VBI Data horizontal range */
#define VCR_VBIVERT 0x324 /* VBI data vertical range */
#define VCR_VBIBUF1 0x328 /* First VBI buffer */
#define VCR_VBISTRIDE 0x32c /* VBI stride */
#define VCR_ANCDATACNT 0x330 /* Ancillary data count setting */
#define VCR_MAXDATA 0x334 /* Active data count of active video */
#define VCR_MAXVBI 0x338 /* Maximum data count of VBI */
#define VCR_CAPDATA 0x33c /* Capture data count */
#define VCR_VBUF1 0x340 /* First video buffer */
#define VCR_VBUF2 0x344 /* Second video buffer */
#define VCR_VBUF3 0x348 /* Third video buffer */
#define VCR_VBUF_MASK 0x1ffffff0 /* Bits 28:4 */
#define VCR_VBIBUF2 0x34c /* Second VBI buffer */
#define VCR_VSTRIDE 0x350 /* Stride of video + coring control */
#define VCR_VS_STRIDE_SHIFT 4
#define VCR_VS_STRIDE 0x00001ff0 /* Stride (8-byte units) */
#define VCR_VS_CCD 0x007f0000 /* Coring compare data */
#define VCR_VS_COREEN 0x00800000 /* Coring enable */
#define VCR_TS0ERR 0x354 /* TS buffer 0 error indicator */
#define VCR_TS1ERR 0x358 /* TS buffer 0 error indicator */
#define VCR_TS2ERR 0x35c /* TS buffer 0 error indicator */
/* Add 0x1000 for the second capture engine registers */

2
drivers/video/via/accel.c
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@ -370,7 +370,7 @@ int viafb_init_engine(struct fb_info *info)
viapar->shared->vq_vram_addr = viapar->fbmem_free;
viapar->fbmem_used += VQ_SIZE;
#if defined(CONFIG_FB_VIA_CAMERA) || defined(CONFIG_FB_VIA_CAMERA_MODULE)
#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
/*
* Set aside a chunk of framebuffer memory for the camera
* driver. Someday this driver probably needs a proper allocator

16
drivers/video/via/via-core.c
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@ -94,6 +94,13 @@ void viafb_irq_disable(u32 mask)
EXPORT_SYMBOL_GPL(viafb_irq_disable);
/* ---------------------------------------------------------------------- */
/*
* Currently, the camera driver is the only user of the DMA code, so we
* only compile it in if the camera driver is being built. Chances are,
* most viafb systems will not need to have this extra code for a while.
* As soon as another user comes long, the ifdef can be removed.
*/
#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
/*
* Access to the DMA engine. This currently provides what the camera
* driver needs (i.e. outgoing only) but is easily expandable if need
@ -322,7 +329,7 @@ int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg)
return 0;
}
EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg);
#endif /* CONFIG_VIDEO_VIA_CAMERA */
/* ---------------------------------------------------------------------- */
/*
@ -507,7 +514,12 @@ static struct viafb_subdev_info {
},
{
.name = "viafb-i2c",
}
},
#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
{
.name = "viafb-camera",
},
#endif
};
#define N_SUBDEVS ARRAY_SIZE(viafb_subdevs)

4
include/linux/via-core.h
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@ -81,7 +81,7 @@ struct viafb_dev {
unsigned long fbmem_start;
long fbmem_len;
void __iomem *fbmem;
#if defined(CONFIG_FB_VIA_CAMERA) || defined(CONFIG_FB_VIA_CAMERA_MODULE)
#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
long camera_fbmem_offset;
long camera_fbmem_size;
#endif
@ -138,6 +138,7 @@ void viafb_irq_disable(u32 mask);
#define VDE_I_LVDSSIEN 0x40000000 /* LVDS Sense enable */
#define VDE_I_ENABLE 0x80000000 /* Global interrupt enable */
#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
/*
* DMA management.
*/
@ -172,6 +173,7 @@ int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg);
*/
#define VGA_WIDTH 640
#define VGA_HEIGHT 480
#endif /* CONFIG_VIDEO_VIA_CAMERA */
/*
* Indexed port operations. Note that these are all multi-op

4
include/media/v4l2-chip-ident.h
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@ -115,6 +115,10 @@ enum {
V4L2_IDENT_VPX3216B = 3216,
V4L2_IDENT_VPX3220A = 3220,
/* VX855 just ident 3409 */
/* Other via devs could use 3314, 3324, 3327, 3336, 3364, 3353 */
V4L2_IDENT_VIA_VX855 = 3409,
/* module tvp5150 */
V4L2_IDENT_TVP5150 = 5150,