diff options
Diffstat (limited to 'sys/arch/sparc/dev/cs4231reg.h')
| -rw-r--r-- | sys/arch/sparc/dev/cs4231reg.h | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/sys/arch/sparc/dev/cs4231reg.h b/sys/arch/sparc/dev/cs4231reg.h new file mode 100644 index 00000000000..fe92a339a76 --- /dev/null +++ b/sys/arch/sparc/dev/cs4231reg.h @@ -0,0 +1,439 @@ +/* $OpenBSD: cs4231reg.h,v 1.1 1999/06/06 04:48:24 jason Exp $ */ + +/* + * Copyright (c) 1999 Jason L. Wright (jason@thought.net) + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Jason L. Wright + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Driver for the CS4231 audio in some sun4m systems + */ + +#define CS_TIMEOUT 90000 + +/* + * CS4231 registers from CS web site and Solaris 2.6 includes. + */ +struct cs4231_regs { + volatile u_int8_t iar; /* index address */ + volatile u_int8_t _padding1[3]; /* reserved */ + volatile u_int8_t idr; /* index data */ + volatile u_int8_t _padding2[3]; /* reserved */ + volatile u_int8_t status; /* status */ + volatile u_int8_t _padding3[3]; /* reserved */ + volatile u_int8_t pior; /* PIO data i/o */ + volatile u_int8_t _padding4[3]; /* reserved */ + volatile u_int32_t dma_csr; /* APC control/status */ + volatile u_int32_t _padding5[3]; /* reserved */ + volatile u_int32_t dma_cva; /* capture virtual addr */ + volatile u_int32_t dma_cc; /* capture count */ + volatile u_int32_t dma_cnva; /* capture next virtual addr */ + volatile u_int32_t dma_cnc; /* capture next count */ + volatile u_int32_t dma_pva; /* playback virtual addr */ + volatile u_int32_t dma_pc; /* playback count */ + volatile u_int32_t dma_pnva; /* playback next virtual addr */ + volatile u_int32_t dma_pnc; /* playback next count */ +}; + +/* + * The CS4231 has 4 direct access registers: iar, idr, status, pior + * + * iar and idr are used to access either 16 or 32 (mode 2 only) "indirect + * registers". + */ + +/* + * Direct mapped registers + */ + +/* cs4231_reg.iar: index address register */ +#define CS_IAR_IR_MASK 0x1f /* indirect register mask */ +#define CS_IAR_TRD 0x20 /* transfer request disable */ +#define CS_IAR_MCE 0x40 /* mode change enable */ +#define CS_IAR_INIT 0x80 /* initialization */ + +/* indirect register numbers (mode1/mode2) */ +#define CS_IAR_LADCIN 0x00 /* left adc input control */ +#define CS_IAR_RADCIN 0x01 /* right adc input control */ +#define CS_IAR_LACIN1 0x02 /* left aux #1 input control */ +#define CS_IAR_RACIN1 0x03 /* right aux #1 input control */ +#define CS_IAR_LACIN2 0x04 /* left aux #2 input control */ +#define CS_IAR_RACIN2 0x05 /* right aux #2 input control */ +#define CS_IAR_LDACOUT 0x06 /* left dac output control */ +#define CS_IAR_RDACOUT 0x07 /* right dac output control */ +#define CS_IAR_FSPB 0x08 /* fs and playback format */ +#define CS_IAR_IC 0x09 /* interface configuration */ +#define CS_IAR_PC 0x0a /* pin control */ +#define CS_IAR_ERRINIT 0x0b /* error status & init */ +#define CS_IAR_MODEID 0x0c /* mode and id */ +#define CS_IAR_LOOP 0x0d /* loopback control */ +#define CS_IAR_PBUB 0x0e /* playback upper base */ +#define CS_IAR_PBLB 0x0f /* playback lower base */ + +/* indirect register numbers (mode2 only) */ + +#define CS_IAR_AFE1 0x10 /* alt feature enable I */ +#define CS_IAR_AFE2 0x11 /* alt feature enable II */ +#define CS_IAR_LLI 0x12 /* left line input control */ +#define CS_IAR_RLI 0x13 /* right line input control */ +#define CS_IAR_TLB 0x14 /* timer lower base */ +#define CS_IAR_TUB 0x15 /* timer upper base */ +#define CS_IAR_reserved1 0x16 /* reserved */ +#define CS_IAR_AFE3 0x17 /* alt feature enable III */ +#define CS_IAR_AFS 0x18 /* alt feature status */ +#define CS_IAR_VID 0x19 /* version id */ +#define CS_IAR_MONO 0x1a /* mono input/output control */ +#define CS_IAR_reserved2 0x1b /* reserved */ +#define CS_IAR_CDF 0x1c /* capture data format */ +#define CS_IAR_reserved3 0x1d /* reserved */ +#define CS_IAR_CUB 0x1e /* capture upper base */ +#define CS_IAR_CLB 0x1f /* capture lower base */ + +/* cs4231_reg.idr: index data register */ +/* Contains the data of the indirect register indexed by the iar */ + +/* cs4231_reg.status: status register */ +#define CS_STATUS_INT 0x01 /* interrupt status(1=active) */ +#define CS_STATUS_PRDY 0x02 /* playback data ready */ +#define CS_STATUS_PL 0x04 /* playback l/r sample */ +#define CS_STATUS_PU 0x08 /* playback up/lw byte needed */ +#define CS_STATUS_SER 0x10 /* sample error */ +#define CS_STATUS_CRDY 0x20 /* capture data ready */ +#define CS_STATUS_CL 0x40 /* capture l/r sample */ +#define CS_STATUS_CU 0x80 /* capture up/lw byte needed */ + +/* cs4231_reg.pior: programmed i/o register */ +/* On write, this is the playback data byte */ +/* On read, it is the capture data byte */ + +/* + * Indirect Mapped Registers + */ + +/* Left ADC Input Control: I0 */ +#define CS_LADCIN_GAIN_MASK 0x0f /* left adc gain */ +#define CS_LADCIN_reserved 0x10 /* reserved */ +#define CS_LADCIN_LMGE 0x20 /* left mic gain enable */ +#define CS_LADCIN_SRC_MASK 0xc0 /* left adc source select */ + +#define CS_LADCIN_SRC_LINE 0x00 /* left input src: line */ +#define CS_LADCIN_SRC_AUX 0x40 /* left input src: aux */ +#define CS_LADCIN_SRC_MIC 0x80 /* left input src: mic */ +#define CS_LADCIN_SRC_LOOP 0xc0 /* left input src: loopback */ + +/* Right ADC Input Control: I1 */ +#define CS_RADCIN_GAIN_MASK 0x0f /* right adc gain */ +#define CS_RADCIN_reserved 0x10 /* reserved */ +#define CS_RADCIN_LMGE 0x20 /* right mic gain enable */ +#define CS_RADCIN_SRC_MASK 0xc0 /* right adc source select */ + +#define CS_RADCIN_SRC_LINE 0x00 /* right input src: line */ +#define CS_RADCIN_SRC_AUX 0x40 /* right input src: aux */ +#define CS_RADCIN_SRC_MIC 0x80 /* right input src: mic */ +#define CS_RADCIN_SRC_LOOP 0xc0 /* right input src: loopback */ + +/* Left Auxiliary #1 Input Control: I2 */ +#define CS_LACIN1_GAIN_MASK 0x1f /* left aux #1 mix gain */ +#define CS_LACIN1_reserved1 0x20 /* reserved */ +#define CS_LACIN1_reserved2 0x40 /* reserved */ +#define CS_LACIN1_LX1M 0x80 /* left aux #1 mute */ + +/* Right Auxiliary #1 Input Control: I3 */ +#define CS_RACIN1_GAIN_MASK 0x1f /* right aux #1 mix gain */ +#define CS_RACIN1_reserved1 0x20 /* reserved */ +#define CS_RACIN1_reserved2 0x40 /* reserved */ +#define CS_RACIN1_RX1M 0x80 /* right aux #1 mute */ + +/* Left Auxiliary #2 Input Control: I4 */ +#define CS_LACIN2_GAIN_MASK 0x1f /* left aux #2 mix gain */ +#define CS_LACIN2_reserved1 0x20 /* reserved */ +#define CS_LACIN2_reserved2 0x40 /* reserved */ +#define CS_LACIN2_LX2M 0x80 /* left aux #2 mute */ + +/* Right Auxiliary #2 Input Control: I5 */ +#define CS_RACIN2_GAIN_MASK 0x1f /* right aux #2 mix gain */ +#define CS_RACIN2_reserved1 0x20 /* reserved */ +#define CS_RACIN2_reserved2 0x40 /* reserved */ +#define CS_RACIN2_RX2M 0x80 /* right aux #2 mute */ + +/* Left DAC Output Control: I6 */ +#define CS_LDACOUT_LDA_MASK 0x3f /* left dac attenuator */ +#define CS_LDACOUT_reserved 0x40 /* reserved */ +#define CS_LDACOUT_LDM 0x80 /* left dac mute */ + +/* Right DAC Output Control: I7 */ +#define CS_RDACOUT_RDA_MASK 0x3f /* right dac attenuator */ +#define CS_RDACOUT_reserved 0x40 /* reserved */ +#define CS_RDACOUT_RDM 0x80 /* right dac mute */ + +/* Fs and Playback Data Format: I8 */ +#define CS_FSPB_C2SL 0x01 /* clock 2 source select */ +#define CS_FSPB_CFS_MASK 0x0e /* clock frequency div select */ +#define CS_FSPB_SM 0x10 /* stereo/mono select */ +#define CS_FSPB_FMT_MASK 0xe0 /* playback format select */ + +#define CS_FSPB_C2SL_XTAL1 0x00 /* use 24.576 Mhz crystal */ +#define CS_FSPB_C2SL_XTAL2 0x01 /* use 16.9344 Mhz crystal */ +#define CS_FSPB_SM_MONO 0x00 /* use mono output */ +#define CS_FSPB_SM_STEREO 0x10 /* use stereo output */ +#define CS_FSPB_FMT_ULINEAR 0x00 /* fmt: linear 8bit unsigned */ +#define CS_FSPB_FMT_ULAW 0x20 /* fmt: ulaw, 8bit companded */ +#define CS_FSPB_FMT_LINEAR_LE 0x40 /* fmt: linear 16bit little */ +#define CS_FSPB_FMT_ALAW 0x60 /* fmt: alaw, 8bit companded */ +#define CS_FSPB_FMT_reserved1 0x80 /* fmt: reserved */ +#define CS_FSPB_FMT_ADPCM 0xa0 /* fmt: adpcm 4bit */ +#define CS_FSPB_FMT_LINEAR_BE 0xc0 /* fmt: linear 16bit big */ +#define CS_FSPB_FMT_reserved2 0xe0 /* fmt: reserved */ + +/* Interface Configuration: I9 */ +#define CS_IC_PEN 0x01 /* playback enable */ +#define CS_IC_CEN 0x02 /* capture enable */ +#define CS_IC_SDC 0x04 /* single dma channel */ +#define CS_IC_CAL_MASK 0x18 /* calibration type mask */ +#define CS_IC_reserved 0x20 /* reserved */ +#define CS_IC_PPIO 0x40 /* playback pio enable */ +#define CS_IC_CPIO 0x80 /* capture pio enable */ + +#define CS_IC_CAL_NONE 0x00 /* no calibration */ +#define CS_IC_CAL_CONV 0x08 /* converter calibration */ +#define CS_IC_CAL_DAC 0x10 /* dac calibration */ +#define CS_IC_CAL_FULL 0x18 /* full calibration */ + +/* Pin Control: I10 */ +#define CS_PC_reserved1 0x01 /* reserved */ +#define CS_PC_IEN 0x02 /* interrupt enable */ +#define CS_PC_reserved2 0x04 /* reserved */ +#define CS_PC_DEN 0x08 /* dither enable */ +#define CS_PC_reserved3 0x10 /* reserved */ +#define CS_PC_reserved4 0x20 /* reserved */ +#define CS_PC_XCTL_MASK 0xc0 /* xctl control */ +#define CS_PC_LINEMUTE 0x40 /* mute line */ +#define CS_PC_HDPHMUTE 0x80 /* mute headphone */ +#define CS_PC_XCTL0 0x40 /* set xtcl0 to 1 */ +#define CS_PC_XCTL1 0x80 /* set xctl1 to 1 */ + +/* Error Status and Initialization: I11 */ +#define CS_ERRINIT_ORL_MASK 0x03 /* overrange left detect */ +#define CS_ERRINIT_ORR_MASK 0x0c /* overrange right detect */ +#define CS_ERRINIT_DRQ 0x10 /* drq status */ +#define CS_ERRINIT_ACI 0x20 /* auto-calibrate in progress */ +#define CS_ERRINIT_PUR 0x40 /* playback underrun */ +#define CS_ERRINIT_COR 0x80 /* capture overrun */ + +#define CS_ERRINIT_ORL_VLOW 0x00 /* < -1.5 dB from full scale */ +#define CS_ERRINIT_ORL_LOW 0x01 /* -1.5dB < x < 0dB */ +#define CS_ERRINIT_ORL_HIGH 0x02 /* 0dB < x < 1.5dB */ +#define CS_ERRINIT_ORL_VHIGH 0x03 /* > 1.5dB overrange */ +#define CS_ERRINIT_ORR_VLOW 0x00 /* < -1.5 dB from full scale */ +#define CS_ERRINIT_ORR_LOW 0x04 /* -1.5dB < x < 0dB */ +#define CS_ERRINIT_ORR_HIGH 0x08 /* 0dB < x < 1.5dB */ +#define CS_ERRINIT_ORR_VHIGH 0x0c /* > 1.5dB overrange */ + +/* Mode and ID: I12 */ +#define CS_MODEID_ID_MASK 0x0f /* Codec ID */ +#define CS_MODEID_reserved1 0x10 /* reserved */ +#define CS_MODEID_reserved2 0x20 /* reserved */ +#define CS_MODEID_MODE2 0x40 /* enable mode2 operation */ + +#define CS_MODEID_CS4231 0x0a /* 1010 == cs4231 */ + +/* Loopback Control: I13 */ +#define CS_LOOP_LBE 0x01 /* loopback enable */ +#define CS_LOOP_reserved 0x02 /* reserved */ +#define CS_LOOP_LBA_MASK 0xfc /* loopback attenuation */ + +/* Playback Upper Base: I14 */ + +/* Playback Lower Base: I15 */ + +/* Alternate Feature Enable I: I16 */ +#define CS_AFE1_DACZ 0x01 /* dac zero */ +#define CS_AFE1_SPE 0x02 /* serial port enable */ +#define CS_AFE1_SF_MASK 0x0c /* serial format mask */ +#define CS_AFE1_PMCE 0x10 /* playback mode change enbl */ +#define CS_AFE1_CMCE 0x20 /* capture mode change enable */ +#define CS_AFE1_TE 0x40 /* timer enable */ +#define CS_AFE1_OLB 0x80 /* output level bit */ + +#define CS_AFE1_SF_64E 0x00 /* 64 bit enhanced */ +#define CS_AFE1_SF_64 0x04 /* 64 bit */ +#define CS_AFE1_SF_32 0x08 /* 32 bit */ +#define CS_AFE1_SF_reserved 0x0c /* reserved */ +#define CS_AFE1_OLB_2 0x00 /* full scale 2Vpp (-3dB) */ +#define CS_AFE1_OLB_28 0x80 /* full scale 2.8Vpp (0dB) */ + +/* Alternate Feature Enable II: I17 */ +#define CS_AFE2_HPF 0x01 /* high pass filter enable */ +#define CS_AFE2_XTALE 0x02 /* crystal enable */ +#define CS_AFE2_APAR 0x04 /* ADPCM pb accumulator reset */ +#define CS_AFE2_reserved 0x08 /* reserved */ +#define CS_AFE2_TEST_MASK 0xf0 /* factory test bits */ + +/* Left Line Input Control: I18 */ +#define CS_LLI_GAIN_MASK 0x1f /* left line mix gain mask */ +#define CS_LLI_reserved1 0x20 /* reserved */ +#define CS_LLI_reserved2 0x40 /* reserved */ +#define CS_LLI_MUTE 0x80 /* left line mute */ + +/* Right Line Input Control: I19 */ +#define CS_RLI_GAIN_MASK 0x1f /* right line mix gain mask */ +#define CS_RLI_reserved1 0x20 /* reserved */ +#define CS_RLI_reserved2 0x40 /* reserved */ +#define CS_RLI_MUTE 0x80 /* right line mute */ + +/* Timer Lower Base: I20 */ + +/* Timer Upper Base: I21 */ + +/* Reserved: I22 */ + +/* Alternate Feature Enable III: I23 */ +#define CS_AFE3_ACF 0x01 /* ADPCM capture freeze */ +#define CS_AFE3_reserved 0xfe /* reserved bits */ + +/* Alternate Feature Status: I24 */ +#define CS_AFS_PU 0x01 /* playback underrun */ +#define CS_AFS_PO 0x02 /* playback overrun */ +#define CS_AFS_CO 0x04 /* capture underrun */ +#define CS_AFS_CU 0x08 /* capture overrun */ +#define CS_AFS_PI 0x10 /* playback interrupt */ +#define CS_AFS_CI 0x20 /* capture interrupt */ +#define CS_AFS_TI 0x40 /* timer interrupt */ +#define CS_AFS_reserved 0x80 /* reserved */ + +/* Version ID: I25 */ +#define CS_VID_CHIP_MASK 0x07 /* chip id mask */ +#define CS_VID_VER_MASK 0xe0 /* version number mask */ + +#define CS_VID_CHIP_CS4231 0x00 /* CS4231 and CS4231A */ +#define CS_VID_VER_CS4231 0x80 /* CS4231 */ +#define CS_VID_VER_CS4232 0x82 /* CS4232 */ +#define CS_VID_VER_CS4231A 0xa0 /* CS4231A */ + +/* Mono Input & Output Control: I26 */ +#define CS_MONO_MIA_MASK 0x0f /* mono attenuation mask */ +#define CS_MONO_reserved 0x10 /* reserved */ +#define CS_MONO_MBY 0x20 /* mono bypass */ +#define CS_MONO_MOM 0x40 /* mono output mute */ +#define CS_MONO_MIM 0x80 /* mono input mute */ + +/* Reserved: I27 */ + +/* Capture Data Format: I28 */ +#define CS_CDF_reserved 0x0f /* reserved bits */ +#define CS_CDF_SM 0x10 /* Stereo/mono select */ +#define CS_CDF_FMT_MASK 0xe0 /* capture format mask */ + +#define CS_CDF_SM_MONO 0x00 /* select mono capture */ +#define CS_CDF_SM_STEREO 0x10 /* select stereo capture */ +#define CS_CDF_FMT_ULINEAR 0x00 /* fmt: linear 8bit unsigned */ +#define CS_CDF_FMT_ULAW 0x20 /* fmt: ulaw, 8bit companded */ +#define CS_CDF_FMT_LINEAR_LE 0x40 /* fmt: linear 16bit little */ +#define CS_CDF_FMT_ALAW 0x60 /* fmt: alaw, 8bit companded */ +#define CS_CDF_FMT_reserved1 0x80 /* fmt: reserved */ +#define CS_CDF_FMT_ADPCM 0xa0 /* fmt: adpcm 4bit */ +#define CS_CDF_FMT_LINEAR_BE 0xc0 /* fmt: linear 16bit big */ +#define CS_CDF_FMT_reserved2 0xe0 /* fmt: reserved */ + +/* Reserved: I29 */ + +/* Capture Upper Base: I30 */ + +/* Capture Lower Base: I31 */ + +/* + * APC DMA Register definitions + */ +#define CS_DMACSR_RESET 0x00000001 /* reset */ +#define CS_DMACSR_CDMA_GO 0x00000004 /* capture dma go */ +#define CS_DMACSR_PDMA_GO 0x00000008 /* playback dma go */ +#define CS_DMACSR_CODEC_RESET 0x00000020 /* codec reset */ +#define CS_DMACSR_CPAUSE 0x00000040 /* capture dma pause */ +#define CS_DMACSR_PPAUSE 0x00000080 /* playback dma pause */ +#define CS_DMACSR_CMIE 0x00000100 /* capture pipe empty enb */ +#define CS_DMACSR_CMI 0x00000200 /* capture pipe empty intr */ +#define CS_DMACSR_CD 0x00000400 /* capture nva dirty */ +#define CS_DMACSR_CM 0x00000800 /* capture data lost */ +#define CS_DMACSR_PMIE 0x00001000 /* pb pipe empty intr enable */ +#define CS_DMACSR_PD 0x00002000 /* pb nva dirty */ +#define CS_DMACSR_PM 0x00004000 /* pb pipe empty */ +#define CS_DMACSR_PMI 0x00008000 /* pb pipe empty interrupt */ +#define CS_DMACSR_EIE 0x00010000 /* error interrupt enable */ +#define CS_DMACSR_CIE 0x00020000 /* capture intr enable */ +#define CS_DMACSR_PIE 0x00040000 /* playback intr enable */ +#define CS_DMACSR_GIE 0x00080000 /* general intr enable */ +#define CS_DMACSR_EI 0x00100000 /* error interrupt */ +#define CS_DMACSR_CI 0x00200000 /* capture interrupt */ +#define CS_DMACSR_PI 0x00400000 /* playback interrupt */ +#define CS_DMACSR_GI 0x00800000 /* general interrupt */ + +#define CS_DMACSR_PLAY ( \ + CS_DMACSR_EI | \ + CS_DMACSR_GIE | \ + CS_DMACSR_PIE | \ + CS_DMACSR_EIE | \ + CS_DMACSR_PDMA_GO | \ + CS_DMACSR_PMIE ) + +#define CS_DMACSR_CAPTURE ( \ + CS_DMACSR_EI | \ + CS_DMACSR_GIE | \ + CS_DMACSR_CIE | \ + CS_DMACSR_EIE | \ + CS_DMACSR_CDMA_GO ) + +#define CS_DMACSR_PLAY_PAUSE (~( \ + CS_DMACSR_PPAUSE | \ + CS_DMACSR_GI | \ + CS_DMACSR_PI | \ + CS_DMACSR_CI | \ + CS_DMACSR_EI | \ + CS_DMACSR_PMI | \ + CS_DMACSR_PMIE | \ + CS_DMACSR_CMI | \ + CS_DMACSR_CMIE ) ) + +#define CS_DMACSR_CAPTURE_PAUSE (~( \ + CS_DMACSR_PPAUSE | \ + CS_DMACSR_GI | \ + CS_DMACSR_PI | \ + CS_DMACSR_CI | \ + CS_DMACSR_EI | \ + CS_DMACSR_PMI | \ + CS_DMACSR_PMIE | \ + CS_DMACSR_CMI | \ + CS_DMACSR_CMIE ) ) + +#define CS_DMACSR_INTR_MASK ( \ + CS_DMACSR_GI | \ + CS_DMACSR_PI | \ + CS_DMACSR_CI | \ + CS_DMACSR_EI | \ + CS_DMACSR_PMI | \ + CS_DMACSR_CMI ) |