11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl) 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net) 51da177e4SLinus Torvalds * 6757f5badSFinn Thain * VME support added by Sam Creasey 7757f5badSFinn Thain * 8757f5badSFinn Thain * TODO: modify this driver to support multiple Sun3 SCSI VME boards 9757f5badSFinn Thain * 101da177e4SLinus Torvalds * Adapted from mac_scsinew.c: 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds /* 131da177e4SLinus Torvalds * Generic Macintosh NCR5380 driver 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov> 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * derived in part from: 181da177e4SLinus Torvalds */ 191da177e4SLinus Torvalds /* 201da177e4SLinus Torvalds * Generic Generic NCR5380 driver 211da177e4SLinus Torvalds * 221da177e4SLinus Torvalds * Copyright 1995, Russell King 231da177e4SLinus Torvalds * 241da177e4SLinus Torvalds * ALPHA RELEASE 1. 251da177e4SLinus Torvalds */ 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #include <linux/types.h> 281da177e4SLinus Torvalds #include <linux/stddef.h> 291da177e4SLinus Torvalds #include <linux/ctype.h> 301da177e4SLinus Torvalds #include <linux/delay.h> 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds #include <linux/module.h> 331da177e4SLinus Torvalds #include <linux/signal.h> 341da177e4SLinus Torvalds #include <linux/ioport.h> 351da177e4SLinus Torvalds #include <linux/init.h> 361da177e4SLinus Torvalds #include <linux/blkdev.h> 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #include <asm/io.h> 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #include <asm/sun3ints.h> 411da177e4SLinus Torvalds #include <asm/dvma.h> 421da177e4SLinus Torvalds #include <asm/idprom.h> 431da177e4SLinus Torvalds #include <asm/machines.h> 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds /* dma on! */ 461da177e4SLinus Torvalds #define REAL_DMA 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds #include "scsi.h" 491da177e4SLinus Torvalds #include <scsi/scsi_host.h> 501da177e4SLinus Torvalds #include "sun3_scsi.h" 519f6620a3SFinn Thain #include "NCR5380.h" 521da177e4SLinus Torvalds 53757f5badSFinn Thain extern int sun3_map_test(unsigned long, char *); 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds /*#define RESET_BOOT */ 561da177e4SLinus Torvalds /* #define SUPPORT_TAGS */ 571da177e4SLinus Torvalds 58757f5badSFinn Thain #ifdef SUN3_SCSI_VME 59757f5badSFinn Thain #define ENABLE_IRQ() 60757f5badSFinn Thain #else 611da177e4SLinus Torvalds #define ENABLE_IRQ() enable_irq( IRQ_SUN3_SCSI ); 62757f5badSFinn Thain #endif 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds 657d12e780SDavid Howells static irqreturn_t scsi_sun3_intr(int irq, void *dummy); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds static int setup_can_queue = -1; 681da177e4SLinus Torvalds module_param(setup_can_queue, int, 0); 691da177e4SLinus Torvalds static int setup_cmd_per_lun = -1; 701da177e4SLinus Torvalds module_param(setup_cmd_per_lun, int, 0); 711da177e4SLinus Torvalds static int setup_sg_tablesize = -1; 721da177e4SLinus Torvalds module_param(setup_sg_tablesize, int, 0); 731da177e4SLinus Torvalds #ifdef SUPPORT_TAGS 741da177e4SLinus Torvalds static int setup_use_tagged_queuing = -1; 751da177e4SLinus Torvalds module_param(setup_use_tagged_queuing, int, 0); 761da177e4SLinus Torvalds #endif 771da177e4SLinus Torvalds static int setup_hostid = -1; 781da177e4SLinus Torvalds module_param(setup_hostid, int, 0); 791da177e4SLinus Torvalds 80811c9366SHenne static struct scsi_cmnd *sun3_dma_setup_done = NULL; 811da177e4SLinus Torvalds 822b0f834cSMichael Schmitz #define RESET_RUN_DONE 832b0f834cSMichael Schmitz 841da177e4SLinus Torvalds #define AFTER_RESET_DELAY (HZ/2) 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds /* ms to wait after hitting dma regs */ 871da177e4SLinus Torvalds #define SUN3_DMA_DELAY 10 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds /* dvma buffer to allocate -- 32k should hopefully be more than sufficient */ 901da177e4SLinus Torvalds #define SUN3_DVMA_BUFSIZE 0xe000 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds /* minimum number of bytes to do dma on */ 931da177e4SLinus Torvalds #define SUN3_DMA_MINSIZE 128 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds static volatile unsigned char *sun3_scsi_regp; 961da177e4SLinus Torvalds static volatile struct sun3_dma_regs *dregs; 97757f5badSFinn Thain #ifndef SUN3_SCSI_VME 981da177e4SLinus Torvalds static struct sun3_udc_regs *udc_regs = NULL; 99757f5badSFinn Thain #endif 1001da177e4SLinus Torvalds static unsigned char *sun3_dma_orig_addr = NULL; 1011da177e4SLinus Torvalds static unsigned long sun3_dma_orig_count = 0; 1021da177e4SLinus Torvalds static int sun3_dma_active = 0; 1031da177e4SLinus Torvalds static unsigned long last_residual = 0; 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds /* 1061da177e4SLinus Torvalds * NCR 5380 register access functions 1071da177e4SLinus Torvalds */ 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static inline unsigned char sun3scsi_read(int reg) 1101da177e4SLinus Torvalds { 1111da177e4SLinus Torvalds return( sun3_scsi_regp[reg] ); 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds static inline void sun3scsi_write(int reg, int value) 1151da177e4SLinus Torvalds { 1161da177e4SLinus Torvalds sun3_scsi_regp[reg] = value; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 119757f5badSFinn Thain #ifndef SUN3_SCSI_VME 1201da177e4SLinus Torvalds /* dma controller register access functions */ 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds static inline unsigned short sun3_udc_read(unsigned char reg) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds unsigned short ret; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds dregs->udc_addr = UDC_CSR; 1271da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 1281da177e4SLinus Torvalds ret = dregs->udc_data; 1291da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds return ret; 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds static inline void sun3_udc_write(unsigned short val, unsigned char reg) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds dregs->udc_addr = reg; 1371da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 1381da177e4SLinus Torvalds dregs->udc_data = val; 1391da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 1401da177e4SLinus Torvalds } 141757f5badSFinn Thain #endif 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds /* 1441da177e4SLinus Torvalds * XXX: status debug 1451da177e4SLinus Torvalds */ 1461da177e4SLinus Torvalds static struct Scsi_Host *default_instance; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds /* 149d0be4a7dSChristoph Hellwig * Function : int sun3scsi_detect(struct scsi_host_template * tpnt) 1501da177e4SLinus Torvalds * 1511da177e4SLinus Torvalds * Purpose : initializes mac NCR5380 driver based on the 1521da177e4SLinus Torvalds * command line / compile time port and irq definitions. 1531da177e4SLinus Torvalds * 1541da177e4SLinus Torvalds * Inputs : tpnt - template for this SCSI adapter. 1551da177e4SLinus Torvalds * 1561da177e4SLinus Torvalds * Returns : 1 if a host adapter was found, 0 if not. 1571da177e4SLinus Torvalds * 1581da177e4SLinus Torvalds */ 1591da177e4SLinus Torvalds 160757f5badSFinn Thain static int __init sun3scsi_detect(struct scsi_host_template *tpnt) 1611da177e4SLinus Torvalds { 162757f5badSFinn Thain unsigned long ioaddr, irq; 1631da177e4SLinus Torvalds static int called = 0; 1641da177e4SLinus Torvalds struct Scsi_Host *instance; 165757f5badSFinn Thain #ifdef SUN3_SCSI_VME 166757f5badSFinn Thain int i; 167757f5badSFinn Thain unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI, 168757f5badSFinn Thain IOBASE_SUN3_VMESCSI + 0x4000, 169757f5badSFinn Thain 0 }; 170757f5badSFinn Thain unsigned long vecs[3] = { SUN3_VEC_VMESCSI0, 171757f5badSFinn Thain SUN3_VEC_VMESCSI1, 172757f5badSFinn Thain 0 }; 173757f5badSFinn Thain #endif 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds /* check that this machine has an onboard 5380 */ 1761da177e4SLinus Torvalds switch(idprom->id_machtype) { 177757f5badSFinn Thain #ifdef SUN3_SCSI_VME 178757f5badSFinn Thain case SM_SUN3|SM_3_160: 179757f5badSFinn Thain case SM_SUN3|SM_3_260: 180757f5badSFinn Thain break; 181757f5badSFinn Thain #else 1821da177e4SLinus Torvalds case SM_SUN3|SM_3_50: 1831da177e4SLinus Torvalds case SM_SUN3|SM_3_60: 1841da177e4SLinus Torvalds break; 185757f5badSFinn Thain #endif 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds default: 1881da177e4SLinus Torvalds return 0; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds if(called) 1921da177e4SLinus Torvalds return 0; 1931da177e4SLinus Torvalds 194757f5badSFinn Thain #ifdef SUN3_SCSI_VME 195757f5badSFinn Thain tpnt->proc_name = "Sun3 5380 VME SCSI"; 196757f5badSFinn Thain #else 1971da177e4SLinus Torvalds tpnt->proc_name = "Sun3 5380 SCSI"; 198757f5badSFinn Thain #endif 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds /* setup variables */ 201*d572f65fSFinn Thain if (setup_can_queue > 0) 202*d572f65fSFinn Thain tpnt->can_queue = setup_can_queue; 203*d572f65fSFinn Thain if (setup_cmd_per_lun > 0) 204*d572f65fSFinn Thain tpnt->cmd_per_lun = setup_cmd_per_lun; 205*d572f65fSFinn Thain if (setup_sg_tablesize >= 0) 206*d572f65fSFinn Thain tpnt->sg_tablesize = setup_sg_tablesize; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds if (setup_hostid >= 0) 2091da177e4SLinus Torvalds tpnt->this_id = setup_hostid; 2101da177e4SLinus Torvalds else { 2111da177e4SLinus Torvalds /* use 7 as default */ 2121da177e4SLinus Torvalds tpnt->this_id = 7; 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 215757f5badSFinn Thain #ifdef SUN3_SCSI_VME 216757f5badSFinn Thain ioaddr = 0; 217757f5badSFinn Thain for (i = 0; addrs[i] != 0; i++) { 218757f5badSFinn Thain unsigned char x; 219757f5badSFinn Thain 220757f5badSFinn Thain ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE, 221757f5badSFinn Thain SUN3_PAGE_TYPE_VME16); 222757f5badSFinn Thain irq = vecs[i]; 223757f5badSFinn Thain sun3_scsi_regp = (unsigned char *)ioaddr; 224757f5badSFinn Thain 225757f5badSFinn Thain dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8); 226757f5badSFinn Thain 227757f5badSFinn Thain if (sun3_map_test((unsigned long)dregs, &x)) { 228757f5badSFinn Thain unsigned short oldcsr; 229757f5badSFinn Thain 230757f5badSFinn Thain oldcsr = dregs->csr; 231757f5badSFinn Thain dregs->csr = 0; 232757f5badSFinn Thain udelay(SUN3_DMA_DELAY); 233757f5badSFinn Thain if (dregs->csr == 0x1400) 234757f5badSFinn Thain break; 235757f5badSFinn Thain 236757f5badSFinn Thain dregs->csr = oldcsr; 237757f5badSFinn Thain } 238757f5badSFinn Thain 239757f5badSFinn Thain iounmap((void *)ioaddr); 240757f5badSFinn Thain ioaddr = 0; 241757f5badSFinn Thain } 242757f5badSFinn Thain 243757f5badSFinn Thain if (!ioaddr) 244757f5badSFinn Thain return 0; 245757f5badSFinn Thain #else 246757f5badSFinn Thain irq = IRQ_SUN3_SCSI; 2471da177e4SLinus Torvalds ioaddr = (unsigned long)ioremap(IOBASE_SUN3_SCSI, PAGE_SIZE); 2481da177e4SLinus Torvalds sun3_scsi_regp = (unsigned char *)ioaddr; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8); 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds if((udc_regs = dvma_malloc(sizeof(struct sun3_udc_regs))) 2531da177e4SLinus Torvalds == NULL) { 2541da177e4SLinus Torvalds printk("SUN3 Scsi couldn't allocate DVMA memory!\n"); 2551da177e4SLinus Torvalds return 0; 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds #endif 2581da177e4SLinus Torvalds #ifdef SUPPORT_TAGS 2591da177e4SLinus Torvalds if (setup_use_tagged_queuing < 0) 260*d572f65fSFinn Thain setup_use_tagged_queuing = 1; 2611da177e4SLinus Torvalds #endif 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); 2641da177e4SLinus Torvalds if(instance == NULL) 2651da177e4SLinus Torvalds return 0; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds default_instance = instance; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds instance->io_port = (unsigned long) ioaddr; 270757f5badSFinn Thain instance->irq = irq; 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds NCR5380_init(instance, 0); 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds instance->n_io_port = 32; 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds if (request_irq(instance->irq, scsi_sun3_intr, 2771e641664SJeff Garzik 0, "Sun3SCSI-5380", instance)) { 2781da177e4SLinus Torvalds #ifndef REAL_DMA 2791da177e4SLinus Torvalds printk("scsi%d: IRQ%d not free, interrupts disabled\n", 2801da177e4SLinus Torvalds instance->host_no, instance->irq); 28122f5f10dSFinn Thain instance->irq = NO_IRQ; 2821da177e4SLinus Torvalds #else 2831da177e4SLinus Torvalds printk("scsi%d: IRQ%d not free, bailing out\n", 2841da177e4SLinus Torvalds instance->host_no, instance->irq); 2851da177e4SLinus Torvalds return 0; 2861da177e4SLinus Torvalds #endif 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds dregs->csr = 0; 2901da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 2911da177e4SLinus Torvalds dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR; 2921da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 2931da177e4SLinus Torvalds dregs->fifo_count = 0; 294757f5badSFinn Thain #ifdef SUN3_SCSI_VME 295757f5badSFinn Thain dregs->fifo_count_hi = 0; 296757f5badSFinn Thain dregs->dma_addr_hi = 0; 297757f5badSFinn Thain dregs->dma_addr_lo = 0; 298757f5badSFinn Thain dregs->dma_count_hi = 0; 299757f5badSFinn Thain dregs->dma_count_lo = 0; 300757f5badSFinn Thain 301757f5badSFinn Thain dregs->ivect = VME_DATA24 | (instance->irq & 0xff); 302757f5badSFinn Thain #endif 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds called = 1; 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds #ifdef RESET_BOOT 3071da177e4SLinus Torvalds sun3_scsi_reset_boot(instance); 3081da177e4SLinus Torvalds #endif 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds return 1; 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 313ed8b9e7fSFinn Thain static int sun3scsi_release(struct Scsi_Host *shpnt) 3141da177e4SLinus Torvalds { 31522f5f10dSFinn Thain if (shpnt->irq != NO_IRQ) 3161e641664SJeff Garzik free_irq(shpnt->irq, shpnt); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds iounmap((void *)sun3_scsi_regp); 3191da177e4SLinus Torvalds 32019b6c51cSGeert Uytterhoeven NCR5380_exit(shpnt); 3211da177e4SLinus Torvalds return 0; 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds #ifdef RESET_BOOT 3251da177e4SLinus Torvalds /* 3261da177e4SLinus Torvalds * Our 'bus reset on boot' function 3271da177e4SLinus Torvalds */ 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds static void sun3_scsi_reset_boot(struct Scsi_Host *instance) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds unsigned long end; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds NCR5380_local_declare(); 3341da177e4SLinus Torvalds NCR5380_setup(instance); 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds /* 3371da177e4SLinus Torvalds * Do a SCSI reset to clean up the bus during initialization. No 3381da177e4SLinus Torvalds * messing with the queues, interrupts, or locks necessary here. 3391da177e4SLinus Torvalds */ 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds printk( "Sun3 SCSI: resetting the SCSI bus..." ); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */ 3441da177e4SLinus Torvalds // sun3_disable_irq( IRQ_SUN3_SCSI ); 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds /* get in phase */ 3471da177e4SLinus Torvalds NCR5380_write( TARGET_COMMAND_REG, 3481da177e4SLinus Torvalds PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) )); 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds /* assert RST */ 3511da177e4SLinus Torvalds NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST ); 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds /* The min. reset hold time is 25us, so 40us should be enough */ 3541da177e4SLinus Torvalds udelay( 50 ); 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds /* reset RST and interrupt */ 3571da177e4SLinus Torvalds NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE ); 3581da177e4SLinus Torvalds NCR5380_read( RESET_PARITY_INTERRUPT_REG ); 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); ) 3611da177e4SLinus Torvalds barrier(); 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds /* switch on SCSI IRQ again */ 3641da177e4SLinus Torvalds // sun3_enable_irq( IRQ_SUN3_SCSI ); 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds printk( " done\n" ); 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds #endif 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds // safe bits for the CSR 3711da177e4SLinus Torvalds #define CSR_GOOD 0x060f 3721da177e4SLinus Torvalds 3737d12e780SDavid Howells static irqreturn_t scsi_sun3_intr(int irq, void *dummy) 3741da177e4SLinus Torvalds { 3751da177e4SLinus Torvalds unsigned short csr = dregs->csr; 3761da177e4SLinus Torvalds int handled = 0; 3771da177e4SLinus Torvalds 378757f5badSFinn Thain #ifdef SUN3_SCSI_VME 379757f5badSFinn Thain dregs->csr &= ~CSR_DMA_ENABLE; 380757f5badSFinn Thain #endif 381757f5badSFinn Thain 3821da177e4SLinus Torvalds if(csr & ~CSR_GOOD) { 3831da177e4SLinus Torvalds if(csr & CSR_DMA_BUSERR) { 3841da177e4SLinus Torvalds printk("scsi%d: bus error in dma\n", default_instance->host_no); 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds if(csr & CSR_DMA_CONFLICT) { 3881da177e4SLinus Torvalds printk("scsi%d: dma conflict\n", default_instance->host_no); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds handled = 1; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds if(csr & (CSR_SDB_INT | CSR_DMA_INT)) { 3947d12e780SDavid Howells NCR5380_intr(irq, dummy); 3951da177e4SLinus Torvalds handled = 1; 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds return IRQ_RETVAL(handled); 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds /* 4021da177e4SLinus Torvalds * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk; 4031da177e4SLinus Torvalds * reentering NCR5380_print_status seems to have ugly side effects 4041da177e4SLinus Torvalds */ 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds /* this doesn't seem to get used at all -- sam */ 4071da177e4SLinus Torvalds #if 0 4081da177e4SLinus Torvalds void sun3_sun3_debug (void) 4091da177e4SLinus Torvalds { 4101da177e4SLinus Torvalds unsigned long flags; 4111da177e4SLinus Torvalds NCR5380_local_declare(); 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds if (default_instance) { 4141da177e4SLinus Torvalds local_irq_save(flags); 4151da177e4SLinus Torvalds NCR5380_print_status(default_instance); 4161da177e4SLinus Torvalds local_irq_restore(flags); 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds #endif 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */ 4231da177e4SLinus Torvalds static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag) 4241da177e4SLinus Torvalds { 4251da177e4SLinus Torvalds void *addr; 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds if(sun3_dma_orig_addr != NULL) 4281da177e4SLinus Torvalds dvma_unmap(sun3_dma_orig_addr); 4291da177e4SLinus Torvalds 430757f5badSFinn Thain #ifdef SUN3_SCSI_VME 431757f5badSFinn Thain addr = (void *)dvma_map_vme((unsigned long) data, count); 432757f5badSFinn Thain #else 4331da177e4SLinus Torvalds addr = (void *)dvma_map((unsigned long) data, count); 434757f5badSFinn Thain #endif 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds sun3_dma_orig_addr = addr; 4371da177e4SLinus Torvalds sun3_dma_orig_count = count; 438757f5badSFinn Thain 439757f5badSFinn Thain #ifndef SUN3_SCSI_VME 4401da177e4SLinus Torvalds dregs->fifo_count = 0; 4411da177e4SLinus Torvalds sun3_udc_write(UDC_RESET, UDC_CSR); 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds /* reset fifo */ 4441da177e4SLinus Torvalds dregs->csr &= ~CSR_FIFO; 4451da177e4SLinus Torvalds dregs->csr |= CSR_FIFO; 446757f5badSFinn Thain #endif 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* set direction */ 4491da177e4SLinus Torvalds if(write_flag) 4501da177e4SLinus Torvalds dregs->csr |= CSR_SEND; 4511da177e4SLinus Torvalds else 4521da177e4SLinus Torvalds dregs->csr &= ~CSR_SEND; 4531da177e4SLinus Torvalds 454757f5badSFinn Thain #ifdef SUN3_SCSI_VME 455757f5badSFinn Thain dregs->csr |= CSR_PACK_ENABLE; 456757f5badSFinn Thain 457757f5badSFinn Thain dregs->dma_addr_hi = ((unsigned long)addr >> 16); 458757f5badSFinn Thain dregs->dma_addr_lo = ((unsigned long)addr & 0xffff); 459757f5badSFinn Thain 460757f5badSFinn Thain dregs->dma_count_hi = 0; 461757f5badSFinn Thain dregs->dma_count_lo = 0; 462757f5badSFinn Thain dregs->fifo_count_hi = 0; 463757f5badSFinn Thain dregs->fifo_count = 0; 464757f5badSFinn Thain #else 4651da177e4SLinus Torvalds /* byte count for fifo */ 4661da177e4SLinus Torvalds dregs->fifo_count = count; 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds sun3_udc_write(UDC_RESET, UDC_CSR); 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds /* reset fifo */ 4711da177e4SLinus Torvalds dregs->csr &= ~CSR_FIFO; 4721da177e4SLinus Torvalds dregs->csr |= CSR_FIFO; 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds if(dregs->fifo_count != count) { 4751da177e4SLinus Torvalds printk("scsi%d: fifo_mismatch %04x not %04x\n", 4761da177e4SLinus Torvalds default_instance->host_no, dregs->fifo_count, 4771da177e4SLinus Torvalds (unsigned int) count); 478d614f068SFinn Thain NCR5380_dprint(NDEBUG_DMA, default_instance); 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /* setup udc */ 4821da177e4SLinus Torvalds udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8); 4831da177e4SLinus Torvalds udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff); 4841da177e4SLinus Torvalds udc_regs->count = count/2; /* count in words */ 4851da177e4SLinus Torvalds udc_regs->mode_hi = UDC_MODE_HIWORD; 4861da177e4SLinus Torvalds if(write_flag) { 4871da177e4SLinus Torvalds if(count & 1) 4881da177e4SLinus Torvalds udc_regs->count++; 4891da177e4SLinus Torvalds udc_regs->mode_lo = UDC_MODE_LSEND; 4901da177e4SLinus Torvalds udc_regs->rsel = UDC_RSEL_SEND; 4911da177e4SLinus Torvalds } else { 4921da177e4SLinus Torvalds udc_regs->mode_lo = UDC_MODE_LRECV; 4931da177e4SLinus Torvalds udc_regs->rsel = UDC_RSEL_RECV; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds /* announce location of regs block */ 4971da177e4SLinus Torvalds sun3_udc_write(((dvma_vtob(udc_regs) & 0xff0000) >> 8), 4981da177e4SLinus Torvalds UDC_CHN_HI); 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds sun3_udc_write((dvma_vtob(udc_regs) & 0xffff), UDC_CHN_LO); 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds /* set dma master on */ 5031da177e4SLinus Torvalds sun3_udc_write(0xd, UDC_MODE); 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds /* interrupt enable */ 5061da177e4SLinus Torvalds sun3_udc_write(UDC_INT_ENABLE, UDC_CSR); 507757f5badSFinn Thain #endif 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds return count; 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds 513757f5badSFinn Thain #ifndef SUN3_SCSI_VME 5141da177e4SLinus Torvalds static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance) 5151da177e4SLinus Torvalds { 5161da177e4SLinus Torvalds unsigned short resid; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds dregs->udc_addr = 0x32; 5191da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 5201da177e4SLinus Torvalds resid = dregs->udc_data; 5211da177e4SLinus Torvalds udelay(SUN3_DMA_DELAY); 5221da177e4SLinus Torvalds resid *= 2; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds return (unsigned long) resid; 5251da177e4SLinus Torvalds } 526757f5badSFinn Thain #endif 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance) 5291da177e4SLinus Torvalds { 5301da177e4SLinus Torvalds return last_residual; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 533811c9366SHenne static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted, 534811c9366SHenne struct scsi_cmnd *cmd, 5351da177e4SLinus Torvalds int write_flag) 5361da177e4SLinus Torvalds { 53733659ebbSChristoph Hellwig if (cmd->request->cmd_type == REQ_TYPE_FS) 5381da177e4SLinus Torvalds return wanted; 5391da177e4SLinus Torvalds else 5401da177e4SLinus Torvalds return 0; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data) 5441da177e4SLinus Torvalds { 545757f5badSFinn Thain #ifdef SUN3_SCSI_VME 546757f5badSFinn Thain unsigned short csr; 5471da177e4SLinus Torvalds 548757f5badSFinn Thain csr = dregs->csr; 549757f5badSFinn Thain 550757f5badSFinn Thain dregs->dma_count_hi = (sun3_dma_orig_count >> 16); 551757f5badSFinn Thain dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff); 552757f5badSFinn Thain 553757f5badSFinn Thain dregs->fifo_count_hi = (sun3_dma_orig_count >> 16); 554757f5badSFinn Thain dregs->fifo_count = (sun3_dma_orig_count & 0xffff); 555757f5badSFinn Thain 556757f5badSFinn Thain /* if(!(csr & CSR_DMA_ENABLE)) 557757f5badSFinn Thain * dregs->csr |= CSR_DMA_ENABLE; 558757f5badSFinn Thain */ 559757f5badSFinn Thain #else 5601da177e4SLinus Torvalds sun3_udc_write(UDC_CHN_START, UDC_CSR); 561757f5badSFinn Thain #endif 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds return 0; 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds /* clean up after our dma is done */ 5671da177e4SLinus Torvalds static int sun3scsi_dma_finish(int write_flag) 5681da177e4SLinus Torvalds { 569757f5badSFinn Thain unsigned short __maybe_unused count; 5701da177e4SLinus Torvalds unsigned short fifo; 5711da177e4SLinus Torvalds int ret = 0; 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds sun3_dma_active = 0; 574757f5badSFinn Thain 575757f5badSFinn Thain #ifdef SUN3_SCSI_VME 576757f5badSFinn Thain dregs->csr &= ~CSR_DMA_ENABLE; 577757f5badSFinn Thain 578757f5badSFinn Thain fifo = dregs->fifo_count; 579757f5badSFinn Thain if (write_flag) { 580757f5badSFinn Thain if ((fifo > 0) && (fifo < sun3_dma_orig_count)) 581757f5badSFinn Thain fifo++; 582757f5badSFinn Thain } 583757f5badSFinn Thain 584757f5badSFinn Thain last_residual = fifo; 585757f5badSFinn Thain /* empty bytes from the fifo which didn't make it */ 586757f5badSFinn Thain if ((!write_flag) && (dregs->csr & CSR_LEFT)) { 587757f5badSFinn Thain unsigned char *vaddr; 588757f5badSFinn Thain 589757f5badSFinn Thain vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr); 590757f5badSFinn Thain 591757f5badSFinn Thain vaddr += (sun3_dma_orig_count - fifo); 592757f5badSFinn Thain vaddr--; 593757f5badSFinn Thain 594757f5badSFinn Thain switch (dregs->csr & CSR_LEFT) { 595757f5badSFinn Thain case CSR_LEFT_3: 596757f5badSFinn Thain *vaddr = (dregs->bpack_lo & 0xff00) >> 8; 597757f5badSFinn Thain vaddr--; 598757f5badSFinn Thain 599757f5badSFinn Thain case CSR_LEFT_2: 600757f5badSFinn Thain *vaddr = (dregs->bpack_hi & 0x00ff); 601757f5badSFinn Thain vaddr--; 602757f5badSFinn Thain 603757f5badSFinn Thain case CSR_LEFT_1: 604757f5badSFinn Thain *vaddr = (dregs->bpack_hi & 0xff00) >> 8; 605757f5badSFinn Thain break; 606757f5badSFinn Thain } 607757f5badSFinn Thain } 608757f5badSFinn Thain #else 6091da177e4SLinus Torvalds // check to empty the fifo on a read 6101da177e4SLinus Torvalds if(!write_flag) { 6111da177e4SLinus Torvalds int tmo = 20000; /* .2 sec */ 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds while(1) { 6141da177e4SLinus Torvalds if(dregs->csr & CSR_FIFO_EMPTY) 6151da177e4SLinus Torvalds break; 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds if(--tmo <= 0) { 6181da177e4SLinus Torvalds printk("sun3scsi: fifo failed to empty!\n"); 6191da177e4SLinus Torvalds return 1; 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds udelay(10); 6221da177e4SLinus Torvalds } 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds count = sun3scsi_dma_count(default_instance); 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds fifo = dregs->fifo_count; 6281da177e4SLinus Torvalds last_residual = fifo; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds /* empty bytes from the fifo which didn't make it */ 6311da177e4SLinus Torvalds if((!write_flag) && (count - fifo) == 2) { 6321da177e4SLinus Torvalds unsigned short data; 6331da177e4SLinus Torvalds unsigned char *vaddr; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds data = dregs->fifo_data; 6361da177e4SLinus Torvalds vaddr = (unsigned char *)dvma_btov(sun3_dma_orig_addr); 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds vaddr += (sun3_dma_orig_count - fifo); 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds vaddr[-2] = (data & 0xff00) >> 8; 6411da177e4SLinus Torvalds vaddr[-1] = (data & 0xff); 6421da177e4SLinus Torvalds } 643757f5badSFinn Thain #endif 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds dvma_unmap(sun3_dma_orig_addr); 6461da177e4SLinus Torvalds sun3_dma_orig_addr = NULL; 647757f5badSFinn Thain 648757f5badSFinn Thain #ifdef SUN3_SCSI_VME 649757f5badSFinn Thain dregs->dma_addr_hi = 0; 650757f5badSFinn Thain dregs->dma_addr_lo = 0; 651757f5badSFinn Thain dregs->dma_count_hi = 0; 652757f5badSFinn Thain dregs->dma_count_lo = 0; 653757f5badSFinn Thain 654757f5badSFinn Thain dregs->fifo_count = 0; 655757f5badSFinn Thain dregs->fifo_count_hi = 0; 656757f5badSFinn Thain 657757f5badSFinn Thain dregs->csr &= ~CSR_SEND; 658757f5badSFinn Thain /* dregs->csr |= CSR_DMA_ENABLE; */ 659757f5badSFinn Thain #else 6601da177e4SLinus Torvalds sun3_udc_write(UDC_RESET, UDC_CSR); 6611da177e4SLinus Torvalds dregs->fifo_count = 0; 6621da177e4SLinus Torvalds dregs->csr &= ~CSR_SEND; 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds /* reset fifo */ 6651da177e4SLinus Torvalds dregs->csr &= ~CSR_FIFO; 6661da177e4SLinus Torvalds dregs->csr |= CSR_FIFO; 667757f5badSFinn Thain #endif 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds sun3_dma_setup_done = NULL; 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds return ret; 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds } 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds #include "sun3_NCR5380.c" 6761da177e4SLinus Torvalds 677d0be4a7dSChristoph Hellwig static struct scsi_host_template driver_template = { 6789dcc26cfSGeert Uytterhoeven .show_info = sun3scsi_show_info, 6791da177e4SLinus Torvalds .name = SUN3_SCSI_NAME, 6801da177e4SLinus Torvalds .detect = sun3scsi_detect, 6811da177e4SLinus Torvalds .release = sun3scsi_release, 6821da177e4SLinus Torvalds .info = sun3scsi_info, 6831da177e4SLinus Torvalds .queuecommand = sun3scsi_queue_command, 6841da177e4SLinus Torvalds .eh_abort_handler = sun3scsi_abort, 6851da177e4SLinus Torvalds .eh_bus_reset_handler = sun3scsi_bus_reset, 686*d572f65fSFinn Thain .can_queue = 16, 6871da177e4SLinus Torvalds .this_id = 7, 688*d572f65fSFinn Thain .sg_tablesize = SG_NONE, 689*d572f65fSFinn Thain .cmd_per_lun = 2, 6901da177e4SLinus Torvalds .use_clustering = DISABLE_CLUSTERING 6911da177e4SLinus Torvalds }; 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds #include "scsi_module.c" 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 697