mirror of
https://github.com/AsahiLinux/u-boot
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73 lines
2.1 KiB
Text
73 lines
2.1 KiB
Text
Matrix Vision mvBlueCOUGAR-P (mvBC-P)
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1. Board Description
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The mvBC-P is a 70x40x40mm multi board gigabit ethernet network camera
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with main focus on GigEVision protocol in combination with local image
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preprocessing.
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Power Supply is either VDC 48V or Pover over Ethernet (PoE).
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2 System Components
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2.1 CPU
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Freescale MPC5200B CPU running at 400MHz core and 133MHz XLB/IPB.
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64MB SDRAM @ 133MHz.
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8 MByte Nor Flash on local bus.
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1 serial ports. Console running on ttyS0 @ 115200 8N1.
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2.2 PCI
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PCI clock fixed at 66MHz. Arbitration inside FPGA.
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Intel GD82541ER network MAC/PHY and FPGA connected.
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2.3 FPGA
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Altera Cyclone-II EP2C8 with PCI DMA engine.
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Connects to Matrix Vision specific CCD/CMOS sensor interface.
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Utilizes 64MB Nand Flash.
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2.3.1 I/O @ FPGA
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2 Outputs : photo coupler
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2 Inputs : photo coupler
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2.4 I2C
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LM75 @ 0x90 for temperature monitoring.
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EEPROM @ 0xA0 for vendor specifics.
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image sensor interface (slave adresses depend on sensor)
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3 Flash layout.
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reset vector is 0x00000100, i.e. "LOWBOOT".
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FF800000 u-boot
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FF840000 u-boot script image
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FF850000 redundant u-boot script image
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FF860000 FPGA raw bit file
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FF8A0000 tbd.
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FF900000 root FS
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FFC00000 kernel
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FFFC0000 device tree blob
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FFFD0000 redundant device tree blob
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FFFE0000 environment
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FFFF0000 redundant environment
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mtd partitions are propagated to linux kernel via device tree blob.
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4 Booting
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On startup the bootscript @ FF840000 is executed. This script can be
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exchanged easily. Default boot mode is "boot from flash", i.e. system
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works stand-alone.
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This behaviour depends on some environment variables :
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"netboot" : yes ->try dhcp/bootp and boot from network.
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A "dhcp_client_id" and "dhcp_vendor-class-identifier" can be used for
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DHCP server configuration, e.g. to provide different images to
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different devices.
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During netboot the system tries to get 3 image files:
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1. Kernel - name + data is given during BOOTP.
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2. Initrd - name is stored in "initrd_name"
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3. device tree blob - name is stored in "dtb_name"
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Fallback files are the flash versions.
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