M&A for exchanging date, status and commands over an hierarchical serial bus assembly using communication packets

• US 5,909,556 A
• Filed: 12/01/1997
• Issued: 06/01/1999
• Est. Priority Date: 10/31/1994
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Nizar, Puthiya Kottal, Haslam, Richard M., Morriss, Jeff Charles, Knoll, Shaun, Bhatt, Ajay V., Cadambi, Sudarshan Bala
• Primary Examiner(s): AUVE, GLENN ALLEN
• Application Number:
  US08/980,507
• Time in Patent Office: 547 Days
• Field of Search: 395/280, 395/285, 395/287, 395/309
• US Class Current: 710/100
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: G06F 13/4291 using a clocked protocol
• CPC Class Codes: H04L 12/40058 Isochronous transmission
• CPC Class Codes: H04L 12/40071 Packet processing; Packet format adaptation of digital video signals for transport over a specific network H04N21/2381, H04N21/4363, H04N21/4381; packet switches H04L49/00; intermediate storage or scheduling H04L49/90
• CPC Class Codes: H04L 12/40117 Interconnection of audio or video/imaging devices home automation networks H04L12/2803; bitstream network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 12/40123 Interconnection of computers and peripherals printer information exchange with computer G06F3/1293

Abstract

Circuitry and complementary logic are provided to a bus controller, a number of 1:n bus signal distributors, and a number of bus interfaces of an hierarchical bus assembly for conducting data communication transactions between bus agents interconnected to the hierarchical bus assembly. The hierarchical serial bus assembly is used to serially interface a number of isochronous and asynchronous peripherals to the system unit of a computer system. These circuitry and complementary logic of the serial bus elements implement a number of elemental packets and a number of transaction protocols, employing a master/slave model of transaction flow control. Data communication transactions are conducted using the elemental packets and in accordance to the transaction protocols. In some embodiments, these circuitry and complementary logic of the serial bus elements are also used to conduct connection management transactions between the serial bus elements. The connection management transactions are conducted in like manner as the data communication transactions.

Claims

1. A computer system comprising:

a plurality of multi-media peripheral devices, each having one or more multi-media functions and a bus interface;

a system unit including a processor and a bus controller; and

one or more bus signal distributors hierarchically coupling the multi-media peripheral devices, through their bus interfaces, to the system unit, through its bus controller, with each bus interface directly coupled to a bus signal distributor, and each bus signal distributor coupled to another bus signal distributor, except for one of the one or more bus signal distributors, which is directly coupled to the bus controller;

the bus controller of the system unit further including logic to serially formulate and transmit token packets of at least a first and a second type to the one or more bus signal distributors and the one or more bus interfaces of the multi-media peripheral devices, to serially authorize management and data transactions with selected ones of the bus signal distributor(s), the bus interfaces, and the multi-media functions,

the management transactions being used for dynamically configuring the bus controller, the one or more bus signal distributors and the one or more bus interfaces in accordance with the manner in which the bus controller, the one or more bus signal distributors and the one or more bus interfaces are coupled to each other,

each token packet having identification information identifying whether the token packet is of the first or the second type, and first address information,

each token packet of the first type being used to authorize either one of the one or more bus signal distributors or one of the one or more bus interfaces to conduct a management transaction with the bus controller, and the first address information of each token packet of the first type being decoded in a partitioned manner including a first portion for identifying a bus signal distributor, and a second portion for identifying either the identified bus signal distributor as the authorized bus signal distributor, or a bus interface coupled to the identified bus signal distributor as the authorized bus interface,

each token packet of the second type being used to authorize a first multi-media function to conduct a data transaction with the bus controller, and the first address information of each token packet of the second type being decoded in an unpartitioned manner for identifying the first authorized multi-media function.

2. The computer system as set forth in claim 1, wherein the bus controller of the system unit further comprises logic to serially exchange data packets of a first type with the authorized bus signal distributors/interfaces and data packets of a second type with the authorized multi-media functions,

each data packet having identification information identifying whether the data packet is of the first or the second type, and second address information,

the second address information of each data packet of the first type being decoded in the first partitioned manner for identifying the authorized bus signal distributor/interface, and

the second address information of each data packet of the second type being decoded in the second unpartitioned manner for identifying the authorized multi-media function.

3. The computer system as set forth in claim 1, wherein

the identification information of each token packet identifies the token packet as the first, the second or a third type instead, and each token packet further includes second address information,

the bus controller of the system unit further comprises logic to serially formulate and transmit token packets of the third type to the multi-media functions to serially authorize data transactions to be conducted between selected twos of the multi-media functions,

both the first and the second address information of each token packet of the third type being decoded in the second unpartitioned manner for identifying two multi-media functions as the authorized multi-media functions of the data transaction.

4. The computer system as set forth in claim 3, wherein the bus controller of the system unit further comprises logic to serially exchange data packets of a first type with the authorized bus signal distributors/interfaces and data packets of a second type with the authorized multi-media functions,

each data packet having identification information identifying whether the data packet is of the first or the second type, and at least third address information,

the at least third address information of each data packet of the first type being decoded in the first partitioned manner for identifying the authorized bus signal distributor/interface, and

the at least third address information of each data packet of the second type being decoded in the second unpartitioned manner for identifying at least one multi-media function as the authorized multi-media function.

5. A computer system comprising:

a plurality of multi-media peripherals, each having one or more multi-media functions and a bus interface;

a system unit having a processor and a bus controller; and

one or more bus signal distributors hierarchically coupling the multi-media peripheral devices, through their bus interfaces, to the system unit, through its bus controller, with each bus interface directly coupled to a bus signal distributor, and each bus signal distributor coupled to another bus signal distributor, except for one of the one or more bus signal distributors, which is directly coupled to the bus controller;

each bus signal distributor including logic to serially receive token packets of at least a first and a second type from the bus controller, and conditionally forward the received token packets to a selected one of the other bus signal distributors coupled to the bus signal distributor or a selected one of the bus interfaces coupled to the bus signal distributor, to serially facilitate authorization by the bus controller of management and data transactions between the bus controller and selected ones of the bus signal distributor(s), the bus interfaces and the multi-media functions,

the management transactions being used for dynamically configuring the bus controller, the one or more bus signal distributors and the one or more bus interfaces in accordance with the manner in which the bus controller, the one or more bus signal distributors and the one or more bus interfaces are coupled to each other;

each token packet having identification information identifying whether the token packet is of the first or the second type, and first address information,

each token packet of the first type being used to authorize either one of the bus signal distributors or one of the one or more bus interfaces to conduct a management transaction with the bus controller, and the first address information of each token packet of the first type being decoded in a partitioned manner including a first portion for identifying a bus signal distributor, and a second portion for identifying either the identified bus signal distributor as the authorized bus signal distributor or a bus interface coupled to the identified bus signal distributor as the authorized bus interface,

each token packet of the second type being used to authorize a multi-media function to conduct a data transaction with the bus controller, and the first address information of each token packet of the second type being decoded in an unpartitioned manner for identifying the first authorized multi-media function.

6. The computer system as set forth in claim 5, wherein each bus signal distributor further comprises logic to serially exchange data packets of a first type with the bus controller, and to facilitate exchanges of data packets of the first type between the bus controller and other authorized bus signal distributors/interfaces, as well as data packets of a second type between the bus controller and the authorized multi-media functions,

each data packet having identification information identifying whether the data packet is of the first or the second type, and second address information,

the second address information of each data packet of the first type being decoded in the first manner for identifying the authorized bus signal distributor/interface, and

the second address information of each data packet of the second type being decoded in the second unpartitioned manner for identifying the authorized multi-media function.

7. The computer system as set forth in claim 5, wherein

the identification information of each token packet identifies the token packet as the first, the second or a third type instead, and each token packet further includes second address information,

the bus signal distributor further comprises logic to serially receive and forward token packets of the third type to the multi-media functions to serially facilitate authorization by the bus controller for data transactions between the first authorized multi-media function and a second authorized multi-media function,

both the first and the second address information of each token packet of the third type being decoded in the second unpartitioned manner for identifying two authorized multi-media functions.

8. The computer system as set forth in claim 7, wherein the bus signal distributor further comprises logic to serially exchange data packets of a first type with the bus controller, and to facilitate exchanges of data packets of the first type between the bus controller and other authorized bus signal distributors/interfaces, as well as data packets of a second type between the bus controller and the authorized multi-media functions or between authorized multi-media functions,

each data packet having identification information identifying whether the data packet is of the first or the second type, and at least third address information,

the at least third address information of each data packet of the first type being decoded in the first partitioned manner for identifying the bus signal distributor or an authorized bus interface, and

the at least third address information of each data packet of the second type being decoded in the second unpartitioned manner for identifying at least one authorized multi-media function.

9. A computer system comprising:

a plurality of multi-media peripherals, each having one or more multi-media functions and a bus interface;

a system unit having a processor and a bus controller; and

one or more bus signal distributors hierarchically coupling the multi-media peripheral devices, through their bus interfaces, to the system unit, through its bus controller, with each bus interface directly coupled to a bus signal distributor, and each bus signal distributor coupled to another bus signal distributor, except for one of the one or more bus signal distributors, which is directly coupled to the bus controller;

each bus interface including logic to serially receive token packets of at least a first and a second type from the bus controller, to serially facilitate authorization by the bus controller of management and data transactions between the bus controller and selected ones of the bus interfaces and the multi-media functions,

the management transactions including configuration transactions for dynamically configuring the bus interfaces, the bus signal distributor(s), and the bus controller in accordance with the manner in which the bus interfaces, the bus signal distributor(s) and the bus controller are coupled to each other,

each token packet having identification information identifying whether the token packet is of the first or the second type, and first address information,

each token packet of the first type being used to authorize either a bus signal distributor or a bus interface to conduct a management transaction with the bus controller, and the first address information of each token packet of the first type being decoded in a partitioned manner including a first portion for identifying a bus signal distributor, and a second portion for identifying either the identified bus signal distributor as the authorized bus signal distributor, or one of the bus interfaces coupled to identified bus signal distributor as the authorized bus interface,

each token packet of the second type being used to authorize a multi-media function to conduct a data transaction with the bus controller, and the first address information of each token packet of the second type being decoded in an unpartitioned manner for identifying the first authorized multi-media function.

10. The computer system as set forth in claim 9, wherein each bus interface further comprises logic to serially exchanging data packets of a first type with the bus controller, or to facilitate exchanges of data packets of a second type between the bus controller and the authorized multi-media functions,

each data packet having identification information identifying whether the data packet is of the first or the second type, and second address information,

the second address information of each data packet of the first type being decoded in the first partitioned manner for identifying the bus signal distributor/interface, and

the second address information of each data packet of the second type being decoded in the second unpartitioned manner for identifying the authorized multi-media function.

11. The computer system as set forth in claim 9, wherein

the identification information of each token packet identifies the token packet as the first, the second, or a third type instead, and each token packet further includes second address information,

the bus interface further comprises logic to serially receive token packets of the third type to serially facilitate authorization by the bus controller for data transactions between the authorized multi-media functions,

both the first and the second address information of each token packet of the third type being decoded in the second unpartitioned manner for identifying two authorized multi-media functions.

12. The computer system as set forth in claim 11, wherein each bus interface further comprises logic to serially exchange data packets of a first type with the bus controller, or to facilitate exchanges of data packets of a second type between the bus controller and authorized multi-media functions, and between authorized multi-media functions,

each data packet having identification information identifying whether the data packet is of the first or the second type, and at least third address information,

the at least third address information of each data packet of the first type being decoded in the first partitioned manner for identifying the bus interface, and

the at least third address information of each data packet of the second type being decoded in the second unpartitioned manner for identifying at least one authorized multi-media function.