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Make default request size in the Kconfig file match default in C code

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This commit is contained in:
Gregory Nutt 2013-11-03 07:42:25 -06:00
parent a2b6d12271
commit fd7126771f
1 changed files with 30 additions and 14 deletions
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44
drivers/usbdev/Kconfig
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@ -431,23 +431,24 @@ config USBMSC
References:
"Universal Serial Bus Mass Storage Class, Specification Overview,"
Revision 1.2, USB Implementer's Forum, June 23, 2003.
"Universal Serial Bus Mass Storage Class, Bulk-Only Transport,"
Revision 1.0, USB Implementer's Forum, September 31, 1999.
"SCSI Primary Commands - 3 (SPC-3)," American National Standard
for Information Technology, May 4, 2005
"SCSI Primary Commands - 4 (SPC-4)," American National Standard
for Information Technology, July 19, 2008
"SCSI Block Commands -2 (SBC-2)," American National Standard
for Information Technology, November 13, 2004
"SCSI Multimedia Commands - 3 (MMC-3)," American National Standard
for Information Technology, November 12, 2001
if USBMSC
config USBMSC_COMPOSITE
bool "Mass storage composite support"
default n
@ -503,6 +504,7 @@ config USBMSC_NWRREQS
default 4
---help---
The number of write/read requests that can be in flight
config USBMSC_NRDREQS
int "The number of read requests that can be in flight"
default 4
@ -510,16 +512,29 @@ config USBMSC_NRDREQS
The number of write/read requests that can be in flight
config USBMSC_BULKINREQLEN
int "Bulk in request size"
default 512
config USBMSC_BULKOUTREQLEN
int "Bulk out request size"
default 512
int "Bulk IN request size"
default 512 if USBDEV_DUALSPEED
default 64 if !USBDEV_DUALSPEED
---help---
The size of the buffer in each write/read request. This
value needs to be at least as large as the endpoint
maxpacket and ideally as large as a block device sector.
The size of the buffer in each WRITE request. This value should to be
at least as large as the endpoint maxpacket size . Most DCDs can divide
a large request buffer down and enqueue the smaller, outgoing packets
for better performance. So, ideally, the size of write request buffer
should be the size of one block device sector which is, often, 512
bytes. The default, however, is the minimum size of 512 or 64 bytes
(depending upon if dual speed operation is supported or not).
config USBMSC_BULKOUTREQLEN
int "Bulk OUT request size"
default 512 if USBDEV_DUALSPEED
default 64 if !USBDEV_DUALSPEED
---help---
The size of the buffer in each READ request. This value should to be
at least as large as the endpoint maxpacket size. Most DCDs will return
the completed READ request to the caller as each packet is received.
Therefore, there is no benefit in increasing the size of this buffer
beyond the maximum size of one packet. Default: 512 or 64 bytes
(depending upon if dual speed operatino is supported or not).
config USBMSC_VENDORID
hex "Mass storage Vendor ID"
@ -556,4 +571,5 @@ config USBMSC_REMOVABLE
---help---
Select if the media is removable
USB Composite Device Configuration
endif