System and method for drive resizing and partition size exchange between a flash memory controller and a smart card

• US 8,307,131 B2
• Filed: 11/12/2007
• Issued: 11/06/2012
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: Thales DIS France SA
• Original Assignee: Gemalto SA (Thales SA)
• Inventors: Prevost, Sylvain, Krishna, Ksheerabdhi, Shah, Ruchirkumar D, Asnaashari, Mehdi
• Primary Examiner(s): Tsai, Henry
• Assistant Examiner(s): BARTELS, CHRISTOPHER A.
• Application Number:
  US11/938,775
• Publication Number:
  US 20090125643A1
• Time in Patent Office: 1,821 Days
• Field of Search: None
• US Class Current: 710/10
• CPC Class Codes: G06F 21/78 to assure secure storage of data address-based protection against unauthorised use of memory G06F12/14; record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: G06F 2221/2153 Using hardware token as a secondary aspect
• CPC Class Codes: G06F 3/0623 in relation to content
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

A system and method to control a device having at least one configurable parameter. Enumerating the device as a first peripheral device and as a second peripheral device wherein the first peripheral device corresponds to a first microcontroller connected to a storage medium and the second peripheral device corresponds to a second microcontroller. Controlling the at least one configurable parameter of the first microcontroller with respect to the storage medium by the second microcontroller. On initialization of the device, transmitting the at least one configurable parameter from the second microcontroller to the first microcontroller. Other systems and methods are disclosed.

Claims

1. A method to control a device connected to a computer and having at least one re-configurable configuration parameter defining an operating characteristic of the device, a storage medium controlled by a first microcontroller, and a second microcontroller, wherein the re-configurable parameter controls an as aspect related to the storage medium, comprising:

operating the device to identify itself to the computer as a first device capable of communicating using a first protocol associated with the storage medium and as a second device capable of communicating using a second protocol associated with the second microcontroller;

in response to receiving a message from the device identifying itself to the computer as a first device capable of communicating using a first protocol associated with the storage medium, operating the computer to associate a first unique peripheral device identifier with the microcontroller connected to a storage medium whereby the computer uses the unique peripheral device identifier to address the storage medium of the device;

in response to receiving a message from the device identifying itself to the computer as a second device capable of communicating using the second protocol associated with the second microcontroller, operating the computer to associate a second peripheral device identifier with the second microcontroller wherein the at least one re-configurable parameter is controlled via the second microcontroller;

controlling updates to the value of the at least one re-configurable parameter with the second microcontroller;

storing the value of the at least one re-configurable parameter in non-volatile memory on the second microcontroller; and

upon start-up of the device, transmitting the value of the at least one re-configurable parameter from the second microcontroller to the first microcontroller.

2. The method of claim 1 further comprising:

receiving by the second peripheral device, a change of the value of the at least one re-configurable parameter from a control program executing on a host computer to which the device is connected; and

in response to receiving the update to the value of the at least one re-configurable parameter, changing the setting of the value of the at least one parameter in a memory location controlled by the second external device.

3. The method of claim 1 wherein operating the device to identify itself to the computer as a first device capable of communicating using a first protocol associated with the storage medium comprises:

operating the device to identify itself to the computer as a first drive having a first size and as a second drive having a second size and wherein the at least one configurable parameter is a size parameter defining at least the first size; and

in response to receiving a message from the device identifying itself to the computer as a first drive having a first size and as a second drive having a second size, the step of operating computer to associate a second peripheral device identifier with the second microcontroller comprises assigning drive letter identifiers to each of the first drive and the second drive, respectively.

4. The method of claim 3 further comprising:

upon start-up of the device transmitting a preset default value of the at least one parameter from the first microcontroller to the second microcontroller;

in response to the second microcontroller detecting a difference in the value of the at least one parameter, transmitting from the second microcontroller to the first microcontroller an override value.

5. The method of claim 1 wherein the first peripheral device corresponds to a flash drive microcontroller connected to a flash memory and the second peripheral device corresponds to a smart card module connected to the flash drive microcontroller.

6. The method of claim 5 further comprising:

in addition to operating the device to identify itself to the computer as a first device capable of communicating using a first protocol and as a second device capable of communicating using a second protocol, operating the device identify itself to the computer as a third device also capable of communicating using the first protocol wherein the first and third devices are identified to the computer as storage drives corresponding to memory partitions in the flash memory; and

wherein the at least one parameter defines sizes of the memory partitions corresponding to the first and third devices.

7. A method of operating a flash memory device connected to a computer and having a first microcontroller connected to and controlling a flash memory and a second microcontroller connected to the first microcontroller, comprising:

operating the flash memory device to identify itself to the computer as a first device capable of communicating using a first protocol associated with the flash memory and as a second device capable of communicating using a second protocol associated with the second microcontroller;

in response to receiving a message from the flash memory device identifying itself to the computer as a first device capable of communicating using a first protocol associated with the flash memory, operating the computer to associate a first unique peripheral device identifier with the flash memory whereby the computer uses the unique peripheral device identifier to address the storage medium of the device;

in response to receiving a message from the device identifying itself to the computer as a second device capable of communicating using the second protocol associated with the second microcontroller, operating the computer to associate a second peripheral device identifier with the second microcontroller;

storing in non-volatile memory of the second microcontroller at least one size parameter defining relative sizes of at least two partitions of the flash memory;

in response to receiving from a host computer, to which the flash memory device is connected, a partition resize request;

operating the second microcontroller to resize the first and second partitions by resetting the at least one size parameter in response to the partition resize request; and

upon start-up of the flash memory device, transmitting from the second microcontroller to the first microcontroller the value of the at least one size parameter partitioning the flash memory into a first memory partition and a second memory partition.

8. The method of claim 7 wherein the at least one size parameter has a preprogrammed default value and upon start-up of the flash memory device transmitting the at least one size parameter from the first microcontroller to the second microcontroller and if a resize request has not previously been transmitted from host computer to the flash memory device, storing the preprogrammed default value in a memory location in the second microcontroller for storing the at least one size parameter thereby establishing initial partitioning according to the preprogrammed default value.

9. A peripheral storage device connectable to a host computer and comprising:

a first microcontroller;

a memory module connected to the first microcontroller the memory module having at least one re-configurable parameter associated therewith and which controls an operating characteristic of the memory module;

a second microcontroller connected to the first microcontroller;

wherein the first microcontroller is controlled by a firmware including instructions to;

the first microcontroller connected to a storage medium to identify the peripheral storage device to the computer as a first device capable of communicating using a first protocol associated with the flash memory and as a second device capable of communicating using a second protocol associated with the second microcontroller thereby causing the host computer to associate a first peripheral device identifier and a second peripheral device identifier with the device; and

wherein the second microcontroller is controlled by a firmware including instructions to;

upon initialization of the peripheral storage device store a default value for the at least one re-configurable parameter;

to receive and process update requests for the at least one re-configurable parameter that controls an operating characteristic of the memory module of the first microcontroller; and

upon start-up of the device, transmit the at least one re-configurable parameter from the second microcontroller to the first microcontroller.

10. The peripheral storage device of claim 9 wherein the second peripheral device is controlled by firmware to

receive, from a control program executing on a host computer to which the device is connected, a command to change the value of the at least one re-configurable parameter;

and

in response to receiving the update to at least one re-configurable parameter, change the setting of the at least one configurable parameter in a memory location controlled by the second peripheral device.

11. The peripheral storage device of claim 10 wherein the first microcontroller is a flash drive controller and the second microcontroller is a smart card module wherein the first microcontroller is controlled by firmware to identify the device to the host computer as a plurality of mass storage drives each corresponding to a partition in the memory module wherein the at least one re-configurable parameter defines the relative size of the plurality of mass storage drives, and to identify the device to the host computer as a smart card reader.

12. A method of operating a mass storage device, comprising:

upon connecting the mass storage device to a host computer, identifying the mass storage device to the host computer as a plurality of mass storage drives and as a smart card reader, wherein each mass storage drive identified to the host computer corresponds to a partition in a flash memory connected to a first microcontroller of the mass storage device thereby causing the host computer to assign a mass storage drive identifier to each identified mass storage drive and a smart card reader identifier to identification of the mass storage device as a smart card reader associated with a second microcontroller of the mass storage device;

storing a value for at least one size parameter in the second microcontroller indicative of size of at least one partition in the flash memory;

upon start-up of the mass storage device, transmitting from the first microcontroller to a the second microcontroller the value of the at least one size parameter indicative of size of at least one partition in the flash memory;

initializing the at least one size parameter stored in the second microcontroller to a preprogrammed default transmitted from the first microcontroller to the second microcontroller;

upon receiving commands from the smart card reader, transmitting the commands from the smart card reader from the first microcontroller to the second microcontroller;

in response to receiving a command to adjust the at least one size parameter from the host computer in a command from the smart card reader, operating the second microcontroller to adjust the value of the at least one size parameter; and

in response to receiving the size parameter at the second microcontroller, determining whether the size parameter has previously been adjusted and if the size parameter has previously been adjusted, transmitting the adjusted size parameter from the second microcontroller to the first microcontroller.