Ashok,
Try passing "stall=0" when inserting file storage gadget on the
Davinci side.
Regards
swami
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Monday, November 19, 2007 3:57 PM
To: [email protected]
Subject: using file backed storage support
Hi,
By enabling the following option, i am able to file backed storage
support.
Linux Kernel Configuration -->> Device Drivers -->> [*] USB support
--->
<*> Inventra Highspeed Dual Role Controller (TI, ...) --> [*]
Disable DMA (always use PIO)
and getting these messages on host side pc
usb 1-3: new high speed USB device using ehci_hcd and address 65
usb 1-3: configuration #1 chosen from 1 choice
scsi1 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 65
usb-storage: waiting for device to settle before scanning
scsi 1:0:0:0: Direct-Access Linux File-Stor Gadget 0316 PQ: 0
ANSI: 2
sd 1:0:0:0: [sda] 131072 512-byte hardware sectors (67 MB)
sd 1:0:0:0: [sda] Write Protect is off
sd 1:0:0:0: [sda] Mode Sense: 0f 00 00 00
sd 1:0:0:0: [sda] Assuming drive cache: write through
sd 1:0:0:0: [sda] 131072 512-byte hardware sectors (67 MB)
sd 1:0:0:0: [sda] Write Protect is off
sd 1:0:0:0: [sda] Mode Sense: 0f 00 00 00
sd 1:0:0:0: [sda] Assuming drive cache: write through
sda: sda1
sd 1:0:0:0: [sda] Attached SCSI removable disk
usb-storage: device scan complete
if i deselect this "Disable DMA" option , then by default DMA mode is
got
selected and getting the following error on host side
Linux Kernel Configuration -->> Device Drivers -->> [*] USB support
--->
<*> Inventra Highspeed Dual Role Controller (TI, ...) --> [ ]
Disable DMA (always use PIO) (Now DMA is enabled)
usb 3-2: new full speed USB device using uhci_hcd and address 34
usb 3-2: device descriptor read/64, error -71
usb 3-2: device descriptor read/64, error -71
usb 3-2: new full speed USB device using uhci_hcd and address 35
usb 3-2: device descriptor read/64, error -71
usb 3-2: device descriptor read/64, error -71
usb 3-2: new full speed USB device using uhci_hcd and address 36
usb 3-2: device not accepting address 36, error -71
usb 3-2: new full speed USB device using uhci_hcd and address 37
usb 3-2: device not accepting address 37, error -71
On Board side
-------------
<6>g_file_storage gadget: File-backed Storage Gadget, version: 28
November 2005
g_file_storage gadget: File-backed Storage Gadget, version: 28 November
2005
<6>g_file_storage gadget: Number of LUNs=1
g_file_storage gadget: Number of LUNs=1
<6>g_file_storage gadget-lun0: ro=0, file: /root/backing_file
g_file_storage gadget-lun0: ro=0, file: /root/backing_file
<7>musb_stage2_irq 807: SUSPEND (b_idle) devctl 99 power e0
<7>musb_stage2_irq 807: SUSPEND (b_idle) devctl 99 power e8
<7>musb_stage0_irq 659: BUS RESET as b_idle
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage2_irq 807: SUSPEND (b_peripheral) devctl 99 power e0
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_i9: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage0_irq 659: BUS RESET as b_peripheral
<7>musb_stage2_i807: SUSPEND (b_peripheral) devctl 99 power e0
any pointers on this would be helpful
Ashok
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