Developing USB Mass storage drivers..

Hi guys,

I'm tasked to make our FPGA board (Altera Stratix II with NiosII core w/ Microtronix uCLinux version 1.4) able to write data out to a USB hard drive (like a LaCie drive). The USB port is OTG. Currently, the driver for writing data out to the USB port has been written, but it doesn't have the mass-storage protocol yet. I was wondering where can I learn how to so (newbie to developing drivers)?

We use CAST USB core. When I boot up the uCLinux, this is the message we are getting. (Just FYI ..if it provides any info about our board at all)

nios2-terminal: connected to hardware target using JTAG UART on cable

nios2-terminal: "USB-Blaster [USB-0]", device 2, instance 3

nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)

Linux version 2.6.11-uc0 (jeff@Andromeda) (gcc version 3.4.1 (Altera Nios II 5.1

b73))# 938 Fri Aug 11 21:23:31 EDT 2006

uClinux/Nios II

Altera Nios II support © 2004 Microtronix Datacom Ltd.

setup_arch: No persistant network settings signature at 03FF0000

Built 1 zonelists

Kernel command line: root=/dev/mtdblock3 ro

PID hash table entries: 256 (order: 8, 4096 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory available: 30368k/32768k RAM, 0k/0k ROM (1709k kernel code, 316k data)

Mount-cache hash table entries: 512 (order: 0, 4096 bytes)

NET: Registered protocol family 16

SCSI subsystem initialized

usbcore: registered new driver usbfs

usbcore: registered new driver hub

comms: FPGA version: 1.2.9

JFFS2 version 2.2. (NAND) © 2001-2003 Red Hat, Inc.

NIOS serial driver version 0.0

ttyS0 (irq = 10) is a builtin NIOS UART

Serial: JTAG UART driver $Revision: 1.4 $

ttyJ0 at MMIO 0x87000000 (irq = 9) is a jtag_uart

io scheduler noop registered

io scheduler anticipatory registered

io scheduler deadline registered

io scheduler cfq registered

RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize

mtip_probe:eth0, 100000 Khz Nios (VSC8211) (PIO)

MoreThanIP 10/100/1000 Driver(v1.0), Linux 2.6.5 Apr2004

mtip_find_phy: found target PHY at address 2

mtip_probe:PHY reg17 = 0x1a34

mtip_probe:eth0, REV=0x00010023, (VSC8211) Phyaddr:0x02

WARNING: No MAC address found in flash at address 0x07fc0000. Using non-unique

MAC address of 00:07:ed:00:00:00

ADDR: 00:07:ed:00:00:00:

mtip_probe:eth1, 100000 Khz Nios (VSC8211) (PIO)

Altera NDK flash (AMD): Found 1 x16 devices at 0x0 in 8-bit bank

Amd/Fujitsu Extended Query Table at 0x0040

Altera NDK flash (AMD): CFI does not contain boot bank location. Assuming top.

number of CFI chips: 1

cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.

cmdlinepart partition parsing not available

RedBoot partition parsing not available

Using Altera NDK partition definition

Creating 7 MTD partitions on "Altera NDK flash (AMD)":

0x00300000-0x00b00000 : "COP - romfs"

0x00000000-0x00300000 : "COP - loader/kernel"

0x00b00000-0x02000000 : "COP - jffs2"

0x02300000-0x02b00000 : "FEP - romfs"

0x02000000-0x02300000 : "FEP - loader/kernel"

0x02b00000-0x03000000 : "FEP - jffs2"

0x03000000-0x04000000 : "FPGA Code"

cast_usb: driver cast-hcd, 15 Jan 2006

cast_usb: USB Host Controller, irq 0

cast_usb: USB Host Controller, irq 2

cast-hcd cast-hcd: new USB bus registered, assigned bus number 1

usb usb1: Product: USB Host Controller

usb usb1: Manufacturer: uClinux 2.6.11-uc0 cast-hcd

usb usb1: SerialNumber: cast-hcd

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 1 port detected

CASTUSB: Timeout waiting for OTG negotiation

cast_hub_control: Jumper 3 installed

cast_hub_control: JUMPERREG: c0060000

cast_hub_control: JUMPERREG: c0060000

Initializing USB Mass Storage driver...

usbcore: registered new driver usb-storage

USB Mass Storage support registered.

cast-udc-sas: loaded.

cast-udc-veh: loaded.

miser_sas gadget: Miser SAS, version: 15 Jan 2006

cast-udc-sas: registered gadget driver 'miser_sas'

cast-udc-sas: Entered IDLE state

cast-udc-sas: Entered PERIPHERAL state

cast-udc-sas: Entered PERIPHERAL state

miser_veh gadget: Miser VEH, version: 15 Jan 2006

cast-udc-veh: registered gadget driver 'miser_veh'

cast-udc-veh: Entered IDLE state

cast-udc-veh: Entered PERIPHERAL state

cast-udc-veh: Entered PERIPHERAL state

NET: Registered protocol family 2

IP: routing cache hash table of 512 buckets, 4Kbytes

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

VFS: Mounted root (romfs filesystem) readonly.

Freeing unused kernel memory: 68k freed (0x41da000 - 0x41ea000)

expand: from=/ramfs.img to=/dev/ram0

expand: from=/ramfs.img to=/dev/ram1

mtip_phy_configure:eth0, autoneg complete

PhyCtl0: 1000 PhySts1: 796D PhyID1: 000F

PhyID2: C4B1 PhyAdv4: 01E1 PhyRemcap5: 0020

mtip_phymac_synch:eth0 MR1: 0x0000796D

Autoneg'd

Link OK:

HalfD

10BASE-T

CMDCF: 0x00000603