+++ /dev/null
-/*
- * (C) Copyright 2001
- * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
- *
- * SPDX-License-Identifier: GPL-2.0+
- * partly derived from
- * linux/drivers/scsi/sym53c8xx.c
- *
- */
-
-/*
- * SCSI support based on the chip sym53C810.
- *
- * 09-19-2001 Andreas Heppel, Sysgo RTS GmbH <aheppel@sysgo.de>
- * The local version of this driver for the BAB750 board does not
- * use interrupts but polls the chip instead (see the call of
- * 'handle_scsi_int()' in 'scsi_issue()'.
- */
-
-#include <common.h>
-
-#include <command.h>
-#include <pci.h>
-#include <asm/processor.h>
-#include <sym53c8xx.h>
-#include <scsi.h>
-
-#undef SYM53C8XX_DEBUG
-
-#ifdef SYM53C8XX_DEBUG
-#define PRINTF(fmt,args...) printf (fmt ,##args)
-#else
-#define PRINTF(fmt,args...)
-#endif
-
-#if defined(CONFIG_SCSI) && defined(CONFIG_SCSI_SYM53C8XX)
-
-#undef SCSI_SINGLE_STEP
-/*
- * Single Step is only used for debug purposes
- */
-#ifdef SCSI_SINGLE_STEP
-static unsigned long start_script_select;
-static unsigned long start_script_msgout;
-static unsigned long start_script_msgin;
-static unsigned long start_script_msg_ext;
-static unsigned long start_script_cmd;
-static unsigned long start_script_data_in;
-static unsigned long start_script_data_out;
-static unsigned long start_script_status;
-static unsigned long start_script_complete;
-static unsigned long start_script_error;
-static unsigned long start_script_reselection;
-static unsigned int len_script_select;
-static unsigned int len_script_msgout;
-static unsigned int len_script_msgin;
-static unsigned int len_script_msg_ext;
-static unsigned int len_script_cmd;
-static unsigned int len_script_data_in;
-static unsigned int len_script_data_out;
-static unsigned int len_script_status;
-static unsigned int len_script_complete;
-static unsigned int len_script_error;
-static unsigned int len_script_reselection;
-#endif
-
-
-static unsigned short scsi_int_mask; /* shadow register for SCSI related interrupts */
-static unsigned char script_int_mask; /* shadow register for SCRIPT related interrupts */
-static unsigned long script_select[8]; /* script for selection */
-static unsigned long script_msgout[8]; /* script for message out phase (NOT USED) */
-static unsigned long script_msgin[14]; /* script for message in phase */
-static unsigned long script_msg_ext[32]; /* script for message in phase when more than 1 byte message */
-static unsigned long script_cmd[18]; /* script for command phase */
-static unsigned long script_data_in[8]; /* script for data in phase */
-static unsigned long script_data_out[8]; /* script for data out phase */
-static unsigned long script_status[6]; /* script for status phase */
-static unsigned long script_complete[10]; /* script for complete */
-static unsigned long script_reselection[4]; /* script for reselection (NOT USED) */
-static unsigned long script_error[2]; /* script for error handling */
-
-static unsigned long int_stat[3]; /* interrupt status */
-static unsigned long scsi_mem_addr; /* base memory address =SCSI_MEM_ADDRESS; */
-
-#define bus_to_phys(a) pci_mem_to_phys(busdevfunc, (unsigned long) (a))
-#define phys_to_bus(a) pci_phys_to_mem(busdevfunc, (unsigned long) (a))
-
-#define SCSI_MAX_RETRY 3 /* number of retries in scsi_issue() */
-
-#define SCSI_MAX_RETRY_NOT_READY 10 /* number of retries when device is not ready */
-#define SCSI_NOT_READY_TIME_OUT 500 /* timeout per retry when not ready */
-
-/*********************************************************************************
- * forward declerations
- */
-
-void scsi_chip_init(void);
-void handle_scsi_int(void);
-
-
-/********************************************************************************
- * reports SCSI errors to the user
- */
-void scsi_print_error (ccb * pccb)
-{
- int i;
-
- printf ("SCSI Error: Target %d LUN %d Command %02X\n", pccb->target,
- pccb->lun, pccb->cmd[0]);
- printf (" CCB: ");
- for (i = 0; i < pccb->cmdlen; i++)
- printf ("%02X ", pccb->cmd[i]);
- printf ("(len=%d)\n", pccb->cmdlen);
- printf (" Cntrl: ");
- switch (pccb->contr_stat) {
- case SIR_COMPLETE:
- printf ("Complete (no Error)\n");
- break;
- case SIR_SEL_ATN_NO_MSG_OUT:
- printf ("Selected with ATN no MSG out phase\n");
- break;
- case SIR_CMD_OUT_ILL_PH:
- printf ("Command out illegal phase\n");
- break;
- case SIR_MSG_RECEIVED:
- printf ("MSG received Error\n");
- break;
- case SIR_DATA_IN_ERR:
- printf ("Data in Error\n");
- break;
- case SIR_DATA_OUT_ERR:
- printf ("Data out Error\n");
- break;
- case SIR_SCRIPT_ERROR:
- printf ("Script Error\n");
- break;
- case SIR_MSG_OUT_NO_CMD:
- printf ("MSG out no Command phase\n");
- break;
- case SIR_MSG_OVER7:
- printf ("MSG in over 7 bytes\n");
- break;
- case INT_ON_FY:
- printf ("Interrupt on fly\n");
- break;
- case SCSI_SEL_TIME_OUT:
- printf ("SCSI Selection Timeout\n");
- break;
- case SCSI_HNS_TIME_OUT:
- printf ("SCSI Handshake Timeout\n");
- break;
- case SCSI_MA_TIME_OUT:
- printf ("SCSI Phase Error\n");
- break;
- case SCSI_UNEXP_DIS:
- printf ("SCSI unexpected disconnect\n");
- break;
- default:
- printf ("unknown status %lx\n", pccb->contr_stat);
- break;
- }
- printf (" Sense: SK %x (", pccb->sense_buf[2] & 0x0f);
- switch (pccb->sense_buf[2] & 0xf) {
- case SENSE_NO_SENSE:
- printf ("No Sense)");
- break;
- case SENSE_RECOVERED_ERROR:
- printf ("Recovered Error)");
- break;
- case SENSE_NOT_READY:
- printf ("Not Ready)");
- break;
- case SENSE_MEDIUM_ERROR:
- printf ("Medium Error)");
- break;
- case SENSE_HARDWARE_ERROR:
- printf ("Hardware Error)");
- break;
- case SENSE_ILLEGAL_REQUEST:
- printf ("Illegal request)");
- break;
- case SENSE_UNIT_ATTENTION:
- printf ("Unit Attention)");
- break;
- case SENSE_DATA_PROTECT:
- printf ("Data Protect)");
- break;
- case SENSE_BLANK_CHECK:
- printf ("Blank check)");
- break;
- case SENSE_VENDOR_SPECIFIC:
- printf ("Vendor specific)");
- break;
- case SENSE_COPY_ABORTED:
- printf ("Copy aborted)");
- break;
- case SENSE_ABORTED_COMMAND:
- printf ("Aborted Command)");
- break;
- case SENSE_VOLUME_OVERFLOW:
- printf ("Volume overflow)");
- break;
- case SENSE_MISCOMPARE:
- printf ("Misscompare\n");
- break;
- default:
- printf ("Illegal Sensecode\n");
- break;
- }
- printf (" ASC %x ASCQ %x\n", pccb->sense_buf[12],
- pccb->sense_buf[13]);
- printf (" Status: ");
- switch (pccb->status) {
- case S_GOOD:
- printf ("Good\n");
- break;
- case S_CHECK_COND:
- printf ("Check condition\n");
- break;
- case S_COND_MET:
- printf ("Condition Met\n");
- break;
- case S_BUSY:
- printf ("Busy\n");
- break;
- case S_INT:
- printf ("Intermediate\n");
- break;
- case S_INT_COND_MET:
- printf ("Intermediate condition met\n");
- break;
- case S_CONFLICT:
- printf ("Reservation conflict\n");
- break;
- case S_TERMINATED:
- printf ("Command terminated\n");
- break;
- case S_QUEUE_FULL:
- printf ("Task set full\n");
- break;
- default:
- printf ("unknown: %02X\n", pccb->status);
- break;
- }
-
-}
-
-
-/******************************************************************************
- * sets-up the SCSI controller
- * the base memory address is retrieved via the pci_read_config_dword
- */
-void scsi_low_level_init(int busdevfunc)
-{
- unsigned int cmd;
- unsigned int addr;
- unsigned char vec;
-
- pci_read_config_byte(busdevfunc, PCI_INTERRUPT_LINE, &vec);
- pci_read_config_dword(busdevfunc, PCI_BASE_ADDRESS_1, &addr);
-
- addr = bus_to_phys(addr & ~0xf);
-
- /*
- * Enable bus mastering in case this has not been done, yet.
- */
- pci_read_config_dword(busdevfunc, PCI_COMMAND, &cmd);
- cmd |= PCI_COMMAND_MASTER;
- pci_write_config_dword(busdevfunc, PCI_COMMAND, cmd);
-
- scsi_mem_addr = addr;
-
- scsi_chip_init();
- scsi_bus_reset();
-}
-
-
-/************************************************************************************
- * Low level Part of SCSI Driver
- */
-
-/*
- * big-endian -> little endian conversion for the script
- */
-unsigned long swap_script(unsigned long val)
-{
- return ((val >> 24) & 0xff) | ((val >> 8) & 0xff00) |
- ((val << 8) & 0xff0000) | ((val << 24) & 0xff000000);
-}
-
-
-void scsi_write_byte(ulong offset,unsigned char val)
-{
- out8(scsi_mem_addr+offset,val);
-}
-
-
-unsigned char scsi_read_byte(ulong offset)
-{
- return(in8(scsi_mem_addr+offset));
-}
-
-
-/********************************************************************************
- * interrupt handler
- */
-void handle_scsi_int(void)
-{
- unsigned char stat,stat1,stat2;
- unsigned short sstat;
- int i;
-#ifdef SCSI_SINGLE_STEP
- unsigned long tt;
-#endif
- stat=scsi_read_byte(ISTAT);
- if((stat & DIP)==DIP) { /* DMA Interrupt pending */
- stat1=scsi_read_byte(DSTAT);
-#ifdef SCSI_SINGLE_STEP
- if((stat1 & SSI)==SSI) {
- tt=in32r(scsi_mem_addr+DSP);
- if(((tt)>=start_script_select) && ((tt)<start_script_select+len_script_select)) {
- printf("select %d\n",(tt-start_script_select)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_msgout) && ((tt)<start_script_msgout+len_script_msgout)) {
- printf("msgout %d\n",(tt-start_script_msgout)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_msgin) && ((tt)<start_script_msgin+len_script_msgin)) {
- printf("msgin %d\n",(tt-start_script_msgin)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_msg_ext) && ((tt)<start_script_msg_ext+len_script_msg_ext)) {
- printf("msgin_ext %d\n",(tt-start_script_msg_ext)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_cmd) && ((tt)<start_script_cmd+len_script_cmd)) {
- printf("cmd %d\n",(tt-start_script_cmd)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_data_in) && ((tt)<start_script_data_in+len_script_data_in)) {
- printf("data_in %d\n",(tt-start_script_data_in)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_data_out) && ((tt)<start_script_data_out+len_script_data_out)) {
- printf("data_out %d\n",(tt-start_script_data_out)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_status) && ((tt)<start_script_status+len_script_status)) {
- printf("status %d\n",(tt-start_script_status)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_complete) && ((tt)<start_script_complete+len_script_complete)) {
- printf("complete %d\n",(tt-start_script_complete)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_error) && ((tt)<start_script_error+len_script_error)) {
- printf("error %d\n",(tt-start_script_error)>>2);
- goto end_single;
- }
- if(((tt)>=start_script_reselection) && ((tt)<start_script_reselection+len_script_reselection)) {
- printf("reselection %d\n",(tt-start_script_reselection)>>2);
- goto end_single;
- }
- printf("sc: %lx\n",tt);
-end_single:
- stat2=scsi_read_byte(DCNTL);
- stat2|=STD;
- scsi_write_byte(DCNTL,stat2);
- }
-#endif
- if((stat1 & SIR)==SIR) /* script interrupt */
- {
- int_stat[0]=in32(scsi_mem_addr+DSPS);
- }
- if((stat1 & DFE)==0) { /* fifo not epmty */
- scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
- stat2=scsi_read_byte(STEST3);
- scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
- }
- }
- if((stat & SIP)==SIP) { /* scsi interrupt */
- sstat = (unsigned short)scsi_read_byte(SIST+1);
- sstat <<=8;
- sstat |= (unsigned short)scsi_read_byte(SIST);
- for(i=0;i<3;i++) {
- if(int_stat[i]==0)
- break; /* found an empty int status */
- }
- int_stat[i]=SCSI_INT_STATE | sstat;
- stat1=scsi_read_byte(DSTAT);
- if((stat1 & DFE)==0) { /* fifo not epmty */
- scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
- stat2=scsi_read_byte(STEST3);
- scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
- }
- }
- if((stat & INTF)==INTF) { /* interrupt on Fly */
- scsi_write_byte(ISTAT,stat); /* clear it */
- for(i=0;i<3;i++) {
- if(int_stat[i]==0)
- break; /* found an empty int status */
- }
- int_stat[i]=INT_ON_FY;
- }
-}
-
-void scsi_bus_reset(void)
-{
- unsigned char t;
- int i;
- int end = CONFIG_SYS_SCSI_SPIN_UP_TIME*1000;
-
- t=scsi_read_byte(SCNTL1);
- scsi_write_byte(SCNTL1,(t | CRST));
- udelay(50);
- scsi_write_byte(SCNTL1,t);
-
- puts("waiting for devices to spin up");
- for(i=0;i<end;i++) {
- udelay(1000); /* give the devices time to spin up */
- if (i % 1000 == 0)
- putc('.');
- }
- putc('\n');
- scsi_chip_init(); /* reinit the chip ...*/
-
-}
-
-void scsi_int_enable(void)
-{
- scsi_write_byte(SIEN,(unsigned char)scsi_int_mask);
- scsi_write_byte(SIEN+1,(unsigned char)(scsi_int_mask>>8));
- scsi_write_byte(DIEN,script_int_mask);
-}
-
-void scsi_write_dsp(unsigned long start)
-{
-#ifdef SCSI_SINGLE_STEP
- unsigned char t;
-#endif
- out32r(scsi_mem_addr + DSP,start);
-#ifdef SCSI_SINGLE_STEP
- t=scsi_read_byte(DCNTL);
- t|=STD;
- scsi_write_byte(DCNTL,t);
-#endif
-}
-
-/* only used for debug purposes */
-void scsi_print_script(void)
-{
- printf("script_select @ 0x%08lX\n",(unsigned long)&script_select[0]);
- printf("script_msgout @ 0x%08lX\n",(unsigned long)&script_msgout[0]);
- printf("script_msgin @ 0x%08lX\n",(unsigned long)&script_msgin[0]);
- printf("script_msgext @ 0x%08lX\n",(unsigned long)&script_msg_ext[0]);
- printf("script_cmd @ 0x%08lX\n",(unsigned long)&script_cmd[0]);
- printf("script_data_in @ 0x%08lX\n",(unsigned long)&script_data_in[0]);
- printf("script_data_out @ 0x%08lX\n",(unsigned long)&script_data_out[0]);
- printf("script_status @ 0x%08lX\n",(unsigned long)&script_status[0]);
- printf("script_complete @ 0x%08lX\n",(unsigned long)&script_complete[0]);
- printf("script_error @ 0x%08lX\n",(unsigned long)&script_error[0]);
-}
-
-
-void scsi_set_script(ccb *pccb)
-{
- int busdevfunc = pccb->priv;
- int i;
- i=0;
- script_select[i++]=swap_script(SCR_REG_REG(GPREG, SCR_AND, 0xfe));
- script_select[i++]=0; /* LED ON */
- script_select[i++]=swap_script(SCR_CLR(SCR_TRG)); /* select initiator mode */
- script_select[i++]=0;
- /* script_select[i++]=swap_script(SCR_SEL_ABS_ATN | pccb->target << 16); */
- script_select[i++]=swap_script(SCR_SEL_ABS | pccb->target << 16);
- script_select[i++]=swap_script(phys_to_bus(&script_cmd[4])); /* error handling */
- script_select[i++]=swap_script(SCR_JUMP); /* next section */
- /* script_select[i++]=swap_script((unsigned long)&script_msgout[0]); */ /* message out */
- script_select[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* command out */
-
-#ifdef SCSI_SINGLE_STEP
- start_script_select=(unsigned long)&script_select[0];
- len_script_select=i*4;
-#endif
-
- i=0;
- script_msgout[i++]=swap_script(SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)));
- script_msgout[i++]=SIR_SEL_ATN_NO_MSG_OUT;
- script_msgout[i++]=swap_script( SCR_MOVE_ABS(1) ^ SCR_MSG_OUT);
- script_msgout[i++]=swap_script(phys_to_bus(&pccb->msgout[0]));
- script_msgout[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_COMMAND))); /* if Command phase */
- script_msgout[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* switch to command */
- script_msgout[i++]=swap_script(SCR_INT); /* interrupt if not */
- script_msgout[i++]=SIR_MSG_OUT_NO_CMD;
-
-#ifdef SCSI_SINGLE_STEP
- start_script_msgout=(unsigned long)&script_msgout[0];
- len_script_msgout=i*4;
-#endif
- i=0;
- script_cmd[i++]=swap_script(SCR_MOVE_ABS(pccb->cmdlen) ^ SCR_COMMAND);
- script_cmd[i++]=swap_script(phys_to_bus(&pccb->cmd[0]));
- script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); /* message in ? */
- script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
- script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT))); /* data out ? */
- script_cmd[i++]=swap_script(phys_to_bus(&script_data_out[0]));
- script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN))); /* data in ? */
- script_cmd[i++]=swap_script(phys_to_bus(&script_data_in[0]));
- script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_STATUS))); /* status ? */
- script_cmd[i++]=swap_script(phys_to_bus(&script_status[0]));
- script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND))); /* command ? */
- script_cmd[i++]=swap_script(phys_to_bus(&script_cmd[0]));
- script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT))); /* message out ? */
- script_cmd[i++]=swap_script(phys_to_bus(&script_msgout[0]));
- script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN))); /* just for error handling message in ? */
- script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
- script_cmd[i++]=swap_script(SCR_INT); /* interrupt if not */
- script_cmd[i++]=SIR_CMD_OUT_ILL_PH;
-#ifdef SCSI_SINGLE_STEP
- start_script_cmd=(unsigned long)&script_cmd[0];
- len_script_cmd=i*4;
-#endif
- i=0;
- script_data_out[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_OUT); /* move */
- script_data_out[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
- script_data_out[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
- script_data_out[i++]=swap_script(phys_to_bus(&script_status[0]));
- script_data_out[i++]=swap_script(SCR_INT);
- script_data_out[i++]=SIR_DATA_OUT_ERR;
-
-#ifdef SCSI_SINGLE_STEP
- start_script_data_out=(unsigned long)&script_data_out[0];
- len_script_data_out=i*4;
-#endif
- i=0;
- script_data_in[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_IN); /* move */
- script_data_in[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
- script_data_in[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
- script_data_in[i++]=swap_script(phys_to_bus(&script_status[0]));
- script_data_in[i++]=swap_script(SCR_INT);
- script_data_in[i++]=SIR_DATA_IN_ERR;
-#ifdef SCSI_SINGLE_STEP
- start_script_data_in=(unsigned long)&script_data_in[0];
- len_script_data_in=i*4;
-#endif
- i=0;
- script_msgin[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN);
- script_msgin[i++]=swap_script(phys_to_bus(&pccb->msgin[0]));
- script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)));
- script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
- script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)));
- script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
- script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)));
- script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
- script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)));
- script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
- script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)));
- script_msgin[i++]=swap_script(phys_to_bus(&script_msg_ext[0]));
- script_msgin[i++]=swap_script(SCR_INT);
- script_msgin[i++]=SIR_MSG_RECEIVED;
-#ifdef SCSI_SINGLE_STEP
- start_script_msgin=(unsigned long)&script_msgin[0];
- len_script_msgin=i*4;
-#endif
- i=0;
- script_msg_ext[i++]=swap_script(SCR_CLR (SCR_ACK)); /* clear ACK */
- script_msg_ext[i++]=0;
- script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* assuming this is the msg length */
- script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[1]));
- script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
- script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
- script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
- script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[2]));
- script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
- script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
- script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
- script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[3]));
- script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
- script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
- script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
- script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[4]));
- script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
- script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
- script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
- script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[5]));
- script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
- script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
- script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
- script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[6]));
- script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
- script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
- script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
- script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[7]));
- script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
- script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
- script_msg_ext[i++]=swap_script(SCR_INT);
- script_msg_ext[i++]=SIR_MSG_OVER7;
-#ifdef SCSI_SINGLE_STEP
- start_script_msg_ext=(unsigned long)&script_msg_ext[0];
- len_script_msg_ext=i*4;
-#endif
- i=0;
- script_status[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_STATUS);
- script_status[i++]=swap_script(phys_to_bus(&pccb->status));
- script_status[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)));
- script_status[i++]=swap_script(phys_to_bus(&script_msgin[0]));
- script_status[i++]=swap_script(SCR_INT);
- script_status[i++]=SIR_STATUS_ILL_PH;
-#ifdef SCSI_SINGLE_STEP
- start_script_status=(unsigned long)&script_status[0];
- len_script_status=i*4;
-#endif
- i=0;
- script_complete[i++]=swap_script(SCR_REG_REG (SCNTL2, SCR_AND, 0x7f));
- script_complete[i++]=0;
- script_complete[i++]=swap_script(SCR_CLR (SCR_ACK|SCR_ATN));
- script_complete[i++]=0;
- script_complete[i++]=swap_script(SCR_WAIT_DISC);
- script_complete[i++]=0;
- script_complete[i++]=swap_script(SCR_REG_REG(GPREG, SCR_OR, 0x01));
- script_complete[i++]=0; /* LED OFF */
- script_complete[i++]=swap_script(SCR_INT);
- script_complete[i++]=SIR_COMPLETE;
-#ifdef SCSI_SINGLE_STEP
- start_script_complete=(unsigned long)&script_complete[0];
- len_script_complete=i*4;
-#endif
- i=0;
- script_error[i++]=swap_script(SCR_INT); /* interrupt if error */
- script_error[i++]=SIR_SCRIPT_ERROR;
-#ifdef SCSI_SINGLE_STEP
- start_script_error=(unsigned long)&script_error[0];
- len_script_error=i*4;
-#endif
- i=0;
- script_reselection[i++]=swap_script(SCR_CLR (SCR_TRG)); /* target status */
- script_reselection[i++]=0;
- script_reselection[i++]=swap_script(SCR_WAIT_RESEL);
- script_reselection[i++]=swap_script(phys_to_bus(&script_select[0])); /* len = 4 */
-#ifdef SCSI_SINGLE_STEP
- start_script_reselection=(unsigned long)&script_reselection[0];
- len_script_reselection=i*4;
-#endif
-}
-
-
-void scsi_issue(ccb *pccb)
-{
- int busdevfunc = pccb->priv;
- int i;
- unsigned short sstat;
- int retrycnt; /* retry counter */
- for(i=0;i<3;i++)
- int_stat[i]=0; /* delete all int status */
- /* struct pccb must be set-up correctly */
- retrycnt=0;
- PRINTF("ID %d issue cmd %02X\n",pccb->target,pccb->cmd[0]);
- pccb->trans_bytes=0; /* no bytes transferred yet */
- scsi_set_script(pccb); /* fill in SCRIPT */
- scsi_int_mask=STO | UDC | MA; /* | CMP; / * Interrupts which are enabled */
- script_int_mask=0xff; /* enable all Ints */
- scsi_int_enable();
- scsi_write_dsp(phys_to_bus(&script_select[0])); /* start script */
- /* now we have to wait for IRQs */
-retry:
- /*
- * This version of the driver is _not_ interrupt driven,
- * but polls the chip's interrupt registers (ISTAT, DSTAT).
- */
- while(int_stat[0]==0)
- handle_scsi_int();
-
- if(int_stat[0]==SIR_COMPLETE) {
- if(pccb->msgin[0]==M_DISCONNECT) {
- PRINTF("Wait for reselection\n");
- for(i=0;i<3;i++)
- int_stat[i]=0; /* delete all int status */
- scsi_write_dsp(phys_to_bus(&script_reselection[0])); /* start reselection script */
- goto retry;
- }
- pccb->contr_stat=SIR_COMPLETE;
- return;
- }
- if((int_stat[0] & SCSI_INT_STATE)==SCSI_INT_STATE) { /* scsi interrupt */
- sstat=(unsigned short)int_stat[0];
- if((sstat & STO)==STO) { /* selection timeout */
- pccb->contr_stat=SCSI_SEL_TIME_OUT;
- scsi_write_byte(GPREG,0x01);
- PRINTF("ID: %X Selection Timeout\n",pccb->target);
- return;
- }
- if((sstat & UDC)==UDC) { /* unexpected disconnect */
- pccb->contr_stat=SCSI_UNEXP_DIS;
- scsi_write_byte(GPREG,0x01);
- PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
- return;
- }
- if((sstat & RSL)==RSL) { /* reselection */
- pccb->contr_stat=SCSI_UNEXP_DIS;
- scsi_write_byte(GPREG,0x01);
- PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
- return;
- }
- if(((sstat & MA)==MA)||((sstat & HTH)==HTH)) { /* phase missmatch */
- if(retrycnt<SCSI_MAX_RETRY) {
- pccb->trans_bytes=pccb->datalen -
- ((unsigned long)scsi_read_byte(DBC) |
- ((unsigned long)scsi_read_byte(DBC+1)<<8) |
- ((unsigned long)scsi_read_byte(DBC+2)<<16));
- for(i=0;i<3;i++)
- int_stat[i]=0; /* delete all int status */
- retrycnt++;
- PRINTF("ID: %X Phase Missmatch Retry %d Phase %02X transferred %lx\n",
- pccb->target,retrycnt,scsi_read_byte(SBCL),pccb->trans_bytes);
- scsi_write_dsp(phys_to_bus(&script_cmd[4])); /* start retry script */
- goto retry;
- }
- if((sstat & MA)==MA)
- pccb->contr_stat=SCSI_MA_TIME_OUT;
- else
- pccb->contr_stat=SCSI_HNS_TIME_OUT;
- PRINTF("Phase Missmatch stat %lx\n",pccb->contr_stat);
- return;
- } /* no phase int */
-/* if((sstat & CMP)==CMP) {
- pccb->contr_stat=SIR_COMPLETE;
- return;
- }
-*/
- PRINTF("SCSI INT %lX\n",int_stat[0]);
- pccb->contr_stat=int_stat[0];
- return;
- } /* end scsi int */
- PRINTF("SCRIPT INT %lX phase %02X\n",int_stat[0],scsi_read_byte(SBCL));
- pccb->contr_stat=int_stat[0];
- return;
-}
-
-int scsi_exec(ccb *pccb)
-{
- unsigned char tmpcmd[16],tmpstat;
- int i,retrycnt,t;
- unsigned long transbytes,datalen;
- unsigned char *tmpptr;
- retrycnt=0;
-retry:
- scsi_issue(pccb);
- if(pccb->contr_stat!=SIR_COMPLETE)
- return false;
- if(pccb->status==S_GOOD)
- return true;
- if(pccb->status==S_CHECK_COND) { /* check condition */
- for(i=0;i<16;i++)
- tmpcmd[i]=pccb->cmd[i];
- pccb->cmd[0]=SCSI_REQ_SENSE;
- pccb->cmd[1]=pccb->lun<<5;
- pccb->cmd[2]=0;
- pccb->cmd[3]=0;
- pccb->cmd[4]=14;
- pccb->cmd[5]=0;
- pccb->cmdlen=6;
- pccb->msgout[0]=SCSI_IDENTIFY;
- transbytes=pccb->trans_bytes;
- tmpptr=pccb->pdata;
- pccb->pdata = &pccb->sense_buf[0];
- datalen=pccb->datalen;
- pccb->datalen=14;
- tmpstat=pccb->status;
- scsi_issue(pccb);
- for(i=0;i<16;i++)
- pccb->cmd[i]=tmpcmd[i];
- pccb->trans_bytes=transbytes;
- pccb->pdata=tmpptr;
- pccb->datalen=datalen;
- pccb->status=tmpstat;
- PRINTF("Request_sense sense key %x ASC %x ASCQ %x\n",pccb->sense_buf[2]&0x0f,
- pccb->sense_buf[12],pccb->sense_buf[13]);
- switch(pccb->sense_buf[2]&0xf) {
- case SENSE_NO_SENSE:
- case SENSE_RECOVERED_ERROR:
- /* seems to be ok */
- return true;
- break;
- case SENSE_NOT_READY:
- if((pccb->sense_buf[12]!=0x04)||(pccb->sense_buf[13]!=0x01)) {
- /* if device is not in process of becoming ready */
- return false;
- break;
- } /* else fall through */
- case SENSE_UNIT_ATTENTION:
- if(retrycnt<SCSI_MAX_RETRY_NOT_READY) {
- PRINTF("Target %d not ready, retry %d\n",pccb->target,retrycnt);
- for(t=0;t<SCSI_NOT_READY_TIME_OUT;t++)
- udelay(1000); /* 1sec wait */
- retrycnt++;
- goto retry;
- }
- PRINTF("Target %d not ready, %d retried\n",pccb->target,retrycnt);
- return false;
- default:
- return false;
- }
- }
- PRINTF("Status = %X\n",pccb->status);
- return false;
-}
-
-
-void scsi_chip_init(void)
-{
- /* first we issue a soft reset */
- scsi_write_byte(ISTAT,SRST);
- udelay(1000);
- scsi_write_byte(ISTAT,0);
- /* setup chip */
- scsi_write_byte(SCNTL0,0xC0); /* full arbitration no start, no message, parity disabled, master */
- scsi_write_byte(SCNTL1,0x00);
- scsi_write_byte(SCNTL2,0x00);
-#ifndef CONFIG_SYS_SCSI_SYM53C8XX_CCF /* config value for none 40 MHz clocks */
- scsi_write_byte(SCNTL3,0x13); /* synchronous clock 40/4=10MHz, asynchronous 40MHz */
-#else
- scsi_write_byte(SCNTL3,CONFIG_SYS_SCSI_SYM53C8XX_CCF); /* config value for none 40 MHz clocks */
-#endif
- scsi_write_byte(SCID,0x47); /* ID=7, enable reselection */
- scsi_write_byte(SXFER,0x00); /* synchronous transfer period 10MHz, asynchronous */
- scsi_write_byte(SDID,0x00); /* targed SCSI ID = 0 */
- scsi_int_mask=0x0000; /* no Interrupt is enabled */
- script_int_mask=0x00;
- scsi_int_enable();
- scsi_write_byte(GPREG,0x01); /* GPIO0 is LED (off) */
- scsi_write_byte(GPCNTL,0x0E); /* GPIO0 is Output */
- scsi_write_byte(STIME0,0x08); /* handshake timer disabled, selection timeout 512msec */
- scsi_write_byte(RESPID,0x80); /* repond only to the own ID (reselection) */
- scsi_write_byte(STEST1,0x00); /* not isolated, SCLK is used */
- scsi_write_byte(STEST2,0x00); /* no Lowlevel Mode? */
- scsi_write_byte(STEST3,0x80); /* enable tolerANT */
- scsi_write_byte(CTEST3,0x04); /* clear FIFO */
- scsi_write_byte(CTEST4,0x00);
- scsi_write_byte(CTEST5,0x00);
-#ifdef SCSI_SINGLE_STEP
-/* scsi_write_byte(DCNTL,IRQM | SSM); */
- scsi_write_byte(DCNTL,IRQD | SSM);
- scsi_write_byte(DMODE,MAN);
-#else
-/* scsi_write_byte(DCNTL,IRQM); */
- scsi_write_byte(DCNTL,IRQD);
- scsi_write_byte(DMODE,0x00);
-#endif
-}
-#endif
projects / u-boot.git / commitdiff