448 lines
12 KiB
C
448 lines
12 KiB
C
/*
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* hal2_timestamp_quad.c -
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*
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* test the timestamping mechanism on the hal2 chip.
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*
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* tidbits of wisdom:
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*
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* 1. timestamp is 64 bits = 2 audio samples
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* 2. frame of data is order as follows: audio L, audio R,
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* timestamp (for stereo of course).
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* 3. timestamps come in 2 flavors:
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* a. second/microsecond
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* b. second/tenths of microseconds/microseconds
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*
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* thus, we have for one frame (of stereo data):
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*
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* 32 bits 32 bits 64 bits
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* L R TIMESTAMP
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*
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* for quad things look just a tad different:
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*
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* l (front) r (front) l (back) r (back) timestamp
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*
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* framesize = 4 bytes * 4 + 8 bytes = 24 bytes = 6 int's
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*/
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#include "sys/sbd.h"
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#include "sys/hal2.h"
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#include "sys/hpc3.h"
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void hal2_timestamp_quad();
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void BuildDescriptors(scdescr_t *list,void *startaddr,int nbytes);
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void PrintDescriptors(scdescr_t *desc);
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void SetupHAL2(void);
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void InitiateDMA(scdescr_t *desc_list, int direction /*0=frommips, 1=tomips*/);
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void WaitForTwoDMAS(void);
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void WaitForOneDMA(int which);
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void ExamineTimestamps(int *soundbuf, int nframes, int mode);
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#define TIMESTAMP_MODE 1 /* 0 = sec/usec, 1 = sec/usec/tenths of usec */
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#define STEP 1000 /* Generates a 1Khz tone */
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#define NSAMPS 96000 /* 2 seconds of tune */
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#define MIN(a,b) ( (a) < (b) ? (a) : (b) )
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#define MAX_DESCRIPTORS 1000
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#define SPIN while (*isrp & HAL2_ISR_TSTATUS);
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#ifdef NOSTAMPS
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int soundbuf[NSAMPS*4]; /* the *4 is because it's quad */
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#else
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int soundbuf[NSAMPS*6]; /* the *6 is because it's stereo w/stamps */
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#endif
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scdescr_t input_descriptors[MAX_DESCRIPTORS];
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scdescr_t output_descriptors[MAX_DESCRIPTORS];
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static int timestampmode = TIMESTAMP_MODE;
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main()
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{
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hal2_unreset();
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hal2_timestamp_quad();
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}
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void
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hal2_timestamp_quad()
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{
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char line[256];
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volatile int i;
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printf("HAL2 audio timestamp test entered\n");
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hal2_configure_pbus_pio();
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hal2_configure_pbus_dma();
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printf("Enter the timestamp mode (0=sec/usec;1=sec/usec/0.1*usec):\n");
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gets(line);
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timestampmode=atoi(line);
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printf("build input dma descriptors\n");
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#ifdef NOSTAMPS
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BuildDescriptors(input_descriptors, soundbuf,NSAMPS*sizeof(long)*4);
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#else
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BuildDescriptors(input_descriptors, soundbuf,NSAMPS*sizeof(long)*6);
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#endif
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/*
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PrintDescriptors(input_descriptors);
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*/
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printf("Set Up HAL2\n");
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SetupHAL2();
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printf("Initiate input DMA\n");
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#ifdef NOSTAMPS
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for(i=0;i<NSAMPS*4;i++) {
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#else
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for(i=0;i<NSAMPS*6;i++) {
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#endif
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soundbuf[i]=0;
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}
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InitiateDMA(input_descriptors, 1);
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printf("Wait for input DMA\n");
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WaitForOneDMA(1);
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/*
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for(i=0;i<10000;i++) {
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printf("%x ",soundbuf[i]);
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if(i%8==7)printf("\n");
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}
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*/
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#ifndef NOSTAMPS
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ExamineTimestamps(soundbuf, NSAMPS, timestampmode);
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#else
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for (i = 0; i < NSAMPS*4; i+=4) {
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if (i % 1000 == 0) printf("%x %x %x %x\n", soundbuf[i],
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soundbuf[i+1], soundbuf[i+2], soundbuf[i+3]);
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}
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#endif
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printf("HAL2 audio timestamp test done\n");
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}
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void
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BuildDescriptors(scdescr_t *list,void *startaddr,int nbytes)
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{
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int nremaining, bytes_till_page_boundary, bytes_this_descriptor;
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char *p;
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scdescr_t *desc;
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desc=list;
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nremaining=nbytes;
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p=(char *)startaddr;
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while(nremaining) {
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desc->cbp = K1_TO_PHYS(p);
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bytes_till_page_boundary = 4096-((int)p & 0xfff);
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bytes_this_descriptor = MIN(bytes_till_page_boundary,nremaining);
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desc->bcnt = bytes_this_descriptor;
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desc->eox=0;
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desc->pad1=0;
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desc->xie=0;
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desc->pad0=0;
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desc->nbp = K1_TO_PHYS(desc+1);
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desc->word_pad = 0;
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nremaining -= bytes_this_descriptor;
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p+= bytes_this_descriptor;
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desc++;
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}
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desc--;
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desc->nbp = 0;
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desc->eox = 1;
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}
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void
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PrintDescriptors(scdescr_t *desc)
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{
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while(1) {
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printf(
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"0x%8x: eox 0x%x pad1 0x%x xie 0x%x pad0 0x%4x bc %d\n",
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desc,
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desc->eox,
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desc->pad1,
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desc->xie,
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desc->pad0,
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desc->bcnt);
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if(desc->eox)break;
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printf("Next address: 0x%8x, buffer address 0x%8x\n",
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desc->nbp, desc->cbp);
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desc++;
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}
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}
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/*
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* InitiateDMA - initiates a transmit DMA on channel 0 of the descriptor
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* chain starting at desc_list.
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*/
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void
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InitiateDMA(scdescr_t *desc_list, int direction /*0=frommips, 1=tomips*/)
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{
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pbus_control_write_t ctrlval;
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volatile pbus_control_write_t* ctrlptr=
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(pbus_control_write_t*)PHYS_TO_K1(HPC3_PBUS_CONTROL(direction));
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volatile unsigned long *dpptr=
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(unsigned long *)PHYS_TO_K1(HPC3_PBUS_DP(direction));
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ctrlval.pad0=0;
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ctrlval.fifo_end=4*direction+3;
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ctrlval.pad1=0;
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ctrlval.fifo_beg=4*direction;
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ctrlval.highwater=11;
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ctrlval.pad2=0;
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ctrlval.real_time=1;
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ctrlval.ch_act_ld=1;
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ctrlval.ch_act=1;
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ctrlval.flush=0;
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ctrlval.receive=direction;
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ctrlval.little=0;
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ctrlval.pad3=0;
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*dpptr=K1_TO_PHYS(desc_list);
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*ctrlptr=ctrlval;
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}
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void
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SetupHAL2(void)
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{
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volatile unsigned long *idr0p=(unsigned long *)PHYS_TO_K1(HAL2_IDR0);
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volatile unsigned long *idr1p=(unsigned long *)PHYS_TO_K1(HAL2_IDR1);
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volatile unsigned long *idr2p=(unsigned long *)PHYS_TO_K1(HAL2_IDR2);
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volatile unsigned long *idr3p=(unsigned long *)PHYS_TO_K1(HAL2_IDR3);
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volatile unsigned long *iarp=(unsigned long *)PHYS_TO_K1(HAL2_IAR);
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volatile unsigned long *isrp=(unsigned long *)PHYS_TO_K1(HAL2_ISR);
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int inc, mod, modctrl;
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/* Set up the ISR */
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*isrp = 0;
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us_delay(50);
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*isrp = HAL2_ISR_CODEC_RESET_N|HAL2_ISR_GLOBAL_RESET_N;
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#ifndef NOSTAMPS
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us_delay(50);
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*isrp = HAL2_ISR_CODEC_RESET_N|HAL2_ISR_GLOBAL_RESET_N|
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HAL2_ISR_CODEC_MODE; /* unreset and put in quad mode */
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if (*isrp != HAL2_ISR_CODEC_RESET_N|HAL2_ISR_GLOBAL_RESET_N|HAL2_ISR_CODEC_MODE) printf("bad isr value\n");
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#endif
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/* Clear DMA ENABLE */
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*idr0p = 0x0; /* Disable all the devices */
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*iarp = HAL2_DMA_ENABLE_W;
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SPIN;
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/* Set up DMA Endian */
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*idr0p = 0; /* All ports are big endian */
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*iarp = HAL2_DMA_ENDIAN_W;
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SPIN;
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/* Set up DMA DRIVE */
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*idr0p = 2; /* Activate only port 1 */
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*iarp = HAL2_DMA_DRIVE_W;
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SPIN;
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/*
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* Set up CODEC A
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*
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* Need to set up codec A even though we are doing input
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* only. For one thing we need to indicate that the DMA
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* channel is going to be quad. Unfortunately, the only
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* way to do that is to make the channel attached to CODEC
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* A a quad channel. Then the B channel is forced to be
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* quad by the HAL2 (I think).
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*
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* Now, don't know whether we must actually activate this
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* DMA channel or not for all this to work. Also, don't
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* know whether we need to drive this DMA channel (see
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* assignment of DMA_DRIVE above).
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*/
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*idr0p = 0 /* Physical DMA channel */
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+(1<<3) /* Bres Clock ID */
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+(3<<8); /* Quad Mode */
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*iarp = HAL2_CODECA_CTRL1_W;
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SPIN;
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*idr0p = (0<<10)+(0x0<<8)+(0x00<<0); /* unmute, A/D gains == 0 */
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*idr1p = (0x03<<7) /* Left D/A output atten */
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+(0x03<<2) /* Right D/A output atten */
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+(0<<1) /* Digital output port data bit 1 */
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+(0); /* Digital output port data bit 0 */
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*iarp = HAL2_CODECA_CTRL2_W;
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SPIN;
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/*
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* Set up CODEC B
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*
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* This is the guy we're interested in!
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*/
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*idr0p = 1 /* Physical DMA channel */
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+(1<<3) /* Bres Clock ID */
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#ifndef NOSTAMPS
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+(1<<5) /* Time stamping */
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#endif
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+(timestampmode<<6);
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*iarp = HAL2_CODECB_CTRL1_W;
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SPIN;
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*idr0p = (0<<10)+(0x3<<8)+(0x0<<4)+(0x0);
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/* unmute, left & right from mic, A/D gains == 00 */
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*idr1p = (0<<7) /* Left D/A output atten */
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+(0<<2) /* Right D/A output atten */
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+(0<<1) /* Digital output port data bit 1 */
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+(0); /* Digital output port data bit 0 */
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*iarp = HAL2_CODECB_CTRL2_W;
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SPIN;
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/* Set up BRES CLOCK 1 */
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*idr0p = 0; /* 48khz master */
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*iarp = HAL2_BRES1_CTRL1_W;
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SPIN;
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inc=1;
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mod=1;
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modctrl = 0xffff & (inc-mod-1);
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*idr0p = inc;
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*idr1p = modctrl;
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*iarp = HAL2_BRES1_CTRL2_W;
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SPIN;
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/* Set up DMA ENABLE */
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/*
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* for now do not enable the DAC (codec A). don't know
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* whether this will influence the success or failure of
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* the program.
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*/
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*idr0p = 0x8 + 0x10; /* Enable only ADC B*/
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*iarp = HAL2_DMA_ENABLE_W;
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SPIN;
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}
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void
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WaitForTwoDMAs(void)
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{
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volatile pbus_control_read_t* ctrl0ptr=
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(pbus_control_read_t*)PHYS_TO_K1(HPC3_PBUS_CONTROL(0));
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volatile pbus_control_read_t* ctrl1ptr=
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(pbus_control_read_t*)PHYS_TO_K1(HPC3_PBUS_CONTROL(1));
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pbus_control_read_t ctrl0val,ctrl1val;
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int ntimes;
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int maxtimes=3000;
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for(ntimes=0;ntimes<maxtimes;ntimes++) {
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ctrl0val = *ctrl0ptr;
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ctrl1val = *ctrl1ptr;
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if(!ctrl0val.ch_act && !ctrl1val.ch_act)break;
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us_delay(10000);
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}
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if(ntimes==maxtimes) {
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printf("Dma did not complete after %d*.01 seconds\n",ntimes);
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} else {
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printf("Dma complete after %d*.01 seconds\n",ntimes);
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}
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}
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void
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WaitForOneDMA(int which)
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{
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volatile pbus_control_read_t* ctrl0ptr=
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(pbus_control_read_t*)PHYS_TO_K1(HPC3_PBUS_CONTROL(which));
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pbus_control_read_t ctrl0val;
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int ntimes;
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int maxtimes=3000;
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for (ntimes = 0; ntimes < maxtimes; ntimes++) {
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ctrl0val = *ctrl0ptr;
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if(!ctrl0val.ch_act) break;
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us_delay(10000);
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}
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if (ntimes == maxtimes) {
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printf("Dma %d did not complete after %d*.01 seconds\n",which,ntimes);
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}
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else {
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printf("Dma %d complete after %d*.01 seconds\n",which,ntimes);
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}
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}
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void
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ExamineTimestamps(int *buf, int nframes, int mode)
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/*
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* Now make this work with 6 int's per frame.
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*/
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{
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volatile i;
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int delta_usec;
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long delta_tenthusec;
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static int prevTimestampLSW = 0, prevTimestampMSW = 0;
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int timestampLSW, timestampMSW;
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switch (mode) {
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case 0: /* seconds/microseconds mode */
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for (i = 0; i < nframes; i++) {
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timestampMSW = buf[4]; /* upper 32 bits of stamp */
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timestampLSW = buf[5]; /* lower 32 bits of stamp */
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buf += 6; /* next frame, please */
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delta_usec = (timestampMSW - prevTimestampMSW) * 1000000 +
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(timestampLSW - prevTimestampLSW);
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if (delta_usec < 0) {
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printf("time is going backwards: frame=%d %d\n", i, delta_usec);
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}
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if (i % 1000 == 0) {
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printf("lf:%x rf:%x lb:%x rb:%x tsm:%x tsl:%x ",
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buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
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printf("ts(msw)=%d ts(lsw)=%d ", buf[4], buf[5]);
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printf("delta_usec=%d\n", delta_usec);
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}
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#ifdef LATER
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/* check on things every 1000 frames */
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if (i % 1000 == 0) {
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printf("%d: MSW = %d LSW = %d\n", i,
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timestampMSW, timestampLSW);
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}
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#endif
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prevTimestampMSW = timestampMSW;
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prevTimestampLSW = timestampLSW;
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}
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break;
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case 1: /* seconds/tenths of microseconds/microseconds */
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/*
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* bit allocation within the words:
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*
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* MSW = seconds
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* LSW[0-19] = microseconds
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* LSW[20-23] = tenths of microseconds
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*/
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for (i = 0; i < nframes; i++) {
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timestampMSW = buf[4]; /* upper 32 bits of stamp */
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timestampLSW = buf[5]; /* lower 32 bits of stamp */
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buf += 6; /* next frame, please */
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delta_tenthusec = (timestampMSW - prevTimestampMSW) * 10000000 +
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((0x7ffff & timestampLSW) - (0x7ffff & prevTimestampLSW)) * 10 +
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(0xf & (timestampLSW >> 20) - 0xf & (prevTimestampLSW >> 20));
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if (delta_tenthusec < 0) {
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printf("time is going backwards:%d %d\n", i, delta_tenthusec);
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}
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if (i % 10000 == 0) {
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printf("ts(msw)=%d ts(lsw)=%d ", buf[4], buf[5]);
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printf("delta_tenthusec=%d\n", delta_tenthusec);
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}
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#ifdef LATER
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/* check on things every 1000 frames */
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if (i % 1000 == 0) {
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printf("%d: MSW = %d LSW = %d\n", i,
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timestampMSW, timestampLSW);
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}
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#endif
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prevTimestampMSW = timestampMSW;
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prevTimestampLSW = timestampLSW;
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}
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break;
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}
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}
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