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Intel ® 82801EB (ICH5) I/O 82801ER (ICH5R), and 82801DB (ICH4) Controller Hub: AC ’97 PRM Programmers Reference Manual (P RM) April 2003 Docum ent Num ber: 252751-001 R.
R 2 AC ’ 97 Programmer’s Reference Manual INFORM ATION I N THIS DOCUM ENT IS PROVI DED IN CONNECTION WITH INTEL ® PRODUCTS. NO LICENSE, EXPRESS O R IM PLI ED, BY ESTOPPEL OR OTHERWISE, TO ANY I NTELL ECTUAL PROPERTY RI GHTS I S GRANTED BY THIS DOCUM ENT.
R AC ’ 97 Programmer’s Reference Manual 3 Contents 1 Introduction ................................................................................................................... ....... 7 1.1 About This Doc um ent .............................
R 4 AC ’ 97 Programmer’s Reference Manual 3.6.3.1 Determ ining the Presenc e of Secondar y and Tertiary Codecs................................................................................. 34 3.6.3.2 Determ ining the Presence of a Modem Function .
R AC ’ 97 Programmer’s Reference Manual 5 Figures Figure 1. Block Diagram of Platform Chips et with Intel ® ICH5 Component ...................... 13 Figure 2. Intel ® ICH5 AC ’97 Controller Connection to Its Com panion Codecs ................ 14 Figure 3.
R 6 AC ’ 97 Programmer’s Reference Manual Revision History Revision Number Description Revisi on Date -001 Initi al Release. April 2003.
Introduction R AC ’ 97 Programmer’s Reference Manual 7 1 Introduction 1.1 A bout This Document This docum ent w as prepared to ass ist In dependent Ha rdw are and Soft w are Vendors (IHVs and ISVs) in support ing the Int el ® I/O controller h ub (ICH5) A C ’97 cont roller feature s et.
Introduction R 8 AC ’ 97 Programmer’s Reference Manual Device Name Vendor ID Device ID Subsystem Vendor ID Subsystem Device ID Base Class Code Sub-Class Code Prog.
Introduction R AC ’ 97 Programmer’s Reference Manual 9 Device Name Vendor ID Device ID Subsystem Vendor ID Subsystem Device ID Base Class Code Sub-Class Code Prog.
Introduction R 10 AC ’ 97 Programmer’s Reference Manual This page is intentionally left blank..
Overv iew R AC ’ 97 Programmer’s Reference Manual 11 2 Overview In thi s docum ent , “ICH 5” stands for I/O C ontroller H ub 5. The ICH5 prov ides an A C ’ 97- compliant controller. Referen ces to the “A C ’97 Component Specification” ref er to the Audio Codec ’97 S pecification , Revision 2.
Overv iew R 12 AC ’ 97 Programmer’s Reference Manual Table 2. A udio Features Distribution Matrix A C ’97 A udio Controller Features Intel ® ICH Intel ® ICH2 Intel ® ICH3 Intel ® ICH4 Intel .
Overv iew R AC ’ 97 Programmer’s Reference Manual 13 Figure 1. Block Diagram o f Platform Chip set w ith Intel ® ICH5 Component Intel ® ICH5 USB 2.0 (Supports 6 USB ports) System Management (TCO) IDE-Pri mary GPIO SMBus 2.0/ I 2 C IDE-Secondary Power Management PCI Bus .
Overv iew R 14 AC ’ 97 Programmer’s Reference Manual Figure 2. Intel ® ICH5 A C ’97 Co ntroller Con nection t o Its Compan ion Codecs Intel ® IC H Digital Cont roller Prim ary Codec A C '97/AC '97 2.x/A MC '97 RESET# SDATA_OU T SYNC BIT_CLK SDATA_IN_ 2 SDATA_IN_ 1 SDATA_IN_ 0 A C '97/M C ' 97 2.
Overv iew R AC ’ 97 Programmer’s Reference Manual 15 2.1.2 Dedicated S/P DIF DMA Output Channel The ICH5 controller pro vides a dedicated DMA engine w ith the capability of outputtin g either PCM o r AC-3 d ata to the S/P D IF link fo r p ass-thro ugh to an exter nal CE audio de cod er.
Overv iew R 16 AC ’ 97 Programmer’s Reference Manual 2.1.5 Second Independent Input DM A Engines The ICH5 continues to provide two sets of input DMA eng ines that allow for the secondary or tertia.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 17 3 Intel ® ICH5 AC ’97 Controller Theory of Operation The ICH5 AC ’ 97 digital controller (DC ) interface is an implem entation of the A C-link, w ith additional featu res to support th e transaction and device pow er manag emen t.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 18 AC ’ 97 Programmer’s Reference Manual Drivers can distribute output and input data in appropriate slots associated with available codec(s).
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 19 Table 4. M od em Registers Device 31 Function 6 Modem Offset Register Defaul t Comments 04h-05h Com.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 20 AC ’ 97 Programmer’s Reference Manual 3.2 DMA Engines The ICH5 AC ’ 97 controller uses a scatter ga ther m echanism to access mem ory. There are five, 16-bit D MA en gin es for A udio: 2 PCM Stereo In , 2 MIC m ono in, and S/P D IF Out .
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 21 Table 6. BD Control and Length (DWORD 1: 04 -07h) Bit Description 31 Interrupt on Completion (IOC) 1= Enable , 0 = Dis able. W hen this it is set, it m eans t he controll er should is sue an int errupt upon com pleti on of this buffer.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 22 AC ’ 97 Programmer’s Reference Manual The following steps describe the driver initialization pro cess for a single DMA engine. The sam e process sh ould be repeated for each DMA eng ine. 1.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 23 Table 10. M od em Last Valid Ind ex Modem Last V alid Index (LVI ) I/O A ddress: Line IN MBAR + 05h (MILVI) Line OUT MBAR + 15h (MOLVI), 5.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 24 AC ’ 97 Programmer’s Reference Manual // Advance tail to next value tail++; } 3.2.4 Stopping Transfer s There are tw o w ays that DMA transfers can be s topped. 1. By sim p ly turn ing off the Bus Master run/pause bit.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 25 2. As a result of th e DMA engine reach ing the L ast Valid Index, no fu rther access to m emory, therefore FIFO w ill not drain.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 26 AC ’ 97 Programmer’s Reference Manual 3.4.3 FI FO Organizati on The ICH5 AC ’97 controller su pports 16-bit sam ples on all ch annels except PCM Out , w hich also support s 20-bi t sam ples.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 27 Figure 7. Incompatible Implementation of Sample Ra te Conversion with Repeating Slots over Next Fra.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 28 AC ’ 97 Programmer’s Reference Manual Table 12. SDM Reg ister Description Bit Ty pe Reset Description 7:6 RW 00 PCM In 2, Microphone I n .
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 29 Shadow ing in mem ory is effectiv e as long as the codec itself does not chang e the value of the registers.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 30 AC ’ 97 Programmer’s Reference Manual 3.6 Pow er Management Power m anagemen t of th e driver/codec interaction requ ires careful sequen cing in the ICH5 A C ’97 environm ent.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 31 Conf igu ration 5 is a tw o-codec audio topology . In this con figuration concerns are on th e proper pow er down sequence. How ever, no driver in teraction is expected as only the audio driver execut es po wer management funct ions.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 32 AC ’ 97 Programmer’s Reference Manual • Mo de m D3 co nfigura tio n is de pe ndent on wake-up on ri ng event e nab le.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 33 Configurati on Numbers 3 to 6: Dual Funct ion Singl e or Dual Codec Configurati ons: Table 16. Po wer St ate M appin g for Audio in Dual Codec Deskt op T ransition PR<0:5> + (EAPD) +12 +5 from +12 +3.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 34 AC ’ 97 Programmer’s Reference Manual Table 17. Po wer St ate M apping for M odem in Dual Codec Deskto p Tran sition PR<A : D> + ML NK (other power control (PRx) bit s do not apply for Intel ® ICH5 implementation) +12 +5 from +12 +3.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 35 3.6.3.2 Determining the Presence of a Modem Function In the case of an AMC config uration, only the primary cod ec ready bit w ill b e indicated.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 36 AC ’ 97 Programmer’s Reference Manual 3.6.5.1 Primary Audio Request ed to D3 The audio pow er ma nagem ent procedure attemptin g to get th e audio codec to D3 state.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R AC ’ 97 Programmer’s Reference Manual 37 3.6.5.4 A udio Primary Request ed to D0 The audio power m anagem ent procedure will attem pt to get the audio codec to D0 state.
Intel® ICH5 AC ’97 Controller Theory of Oper ation R 38 AC ’ 97 Programmer’s Reference Manual A pseudo code representation is as follows: void Link_reset(void) { If Cold_Reset# == True // AC_RE.
Surround Audio Support R AC ’ 97 Programmer’s Reference Manual 39 4 Surround Audio Support The AC ’97 Component Specification allow s for up to six channels of audio supported in the A C- link.
Surround Audio Support R 40 AC ’ 97 Programmer’s Reference Manual Table 20. Multiple Codec A udio Channel Distribution Split A udio Codec Configuration Primary Secondary T ertiary Total Channels L.
Surround Audio Support R AC ’ 97 Programmer’s Reference Manual 41 Table 22. AC-Link PCM 4/6 -Chann els Enable Bits PCM 4/ 6 Enable: Enables the PCM Output to be in 4 channel or 6-channel mode. PCM Slots Enable : (PCM OUT DMA) S/PDIF Slots Ena ble: (S/PDI F Out DM A ) 00 = 2 channel m ode (default).
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20-Bits PCM Support R AC ’ 97 Programmer’s Reference Manual 43 5 20-Bits PCM Support The ICH5 A C ’97 con troller prov ides su pport for 16- or 20-bit PCM out.
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Independent S-P/DIF Output Capability R AC ’ 97 Programmer’s Reference Manual 45 6 Independent S-P/DIF Output Capability The ICH5 AC ’97 controller provi des an in dependent DMA en gin e for S- P/DIF ou tput th at operates independently of the six ch annels PCM Out stream .
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Support for Double Rate Audio R AC ’ 97 Programmer’s Reference Manual 47 7 Support for Double Rate Audio The ICH5 AC’ 97 controller has the capability of supporting a s tereo 96 kHz st ream u sing the AC’ 97 Double Rate Audio (DRA ) support.
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Independent Input Channels Capability R AC ’ 97 Programmer’s Reference Manual 49 8 Independent Input Channels Capability ICH5 AC ’97 controller provides capability for tw o DMA channels dedicated to independent PCM and Microphon e audio stream s.
Independent Input Channels Capability R 50 AC ’ 97 Programmer’s Reference Manual Bit Descripti on 11 Reserved 3 Steer Enabl e (SE): W hen set, the S DATA_I N lines are t reated separat ely and not OR’d t ogether before being sent t o the DMA engines .
Intel® ICH5 AC ’ 97 Modem Driver R AC ’ 97 Programmer’s Reference Manual 51 9 Intel ® ICH5 AC ’97 Modem Driver The AC ’97 Component Specification allow s for a m odem codec to be connected to th e AC- link interface. This allow s for the developmen t of a softw are stack that provides modem fun ctionality, i.
Intel® ICH5 AC ’97 M odem Driver R 52 AC ’ 97 Programmer’s Reference Manual The first invocation of the h ost based modem task provides an initial buff e r and one or more buff ers of s purious data (h enceforth , spurious buff ers).
Intel® ICH5 AC ’ 97 Modem Driver R AC ’ 97 Programmer’s Reference Manual 53 while (tail <= Prefetched_Index) { tail++; // Happens IFF Spurious Data was used } if ( ((tail <= LastValidIndex) || (tail == free)) &&(((tail+1) <= LastValidIndex) || ((tail+1) == free)) ) { Descriptor.
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