diff options
| -rw-r--r-- | drivers/scsi/sun3_scsi.c | 223 | ||||
| -rw-r--r-- | drivers/scsi/sun3_scsi_vme.c | 583 |
2 files changed, 172 insertions, 634 deletions
diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c index ac9c29b55a33..9707b7494a89 100644 --- a/drivers/scsi/sun3_scsi.c +++ b/drivers/scsi/sun3_scsi.c @@ -3,6 +3,10 @@ * * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net) * + * VME support added by Sam Creasey + * + * TODO: modify this driver to support multiple Sun3 SCSI VME boards + * * Adapted from mac_scsinew.c: */ /* @@ -73,7 +77,7 @@ #include "sun3_scsi.h" #include "NCR5380.h" -/* #define OLDDMA */ +extern int sun3_map_test(unsigned long, char *); #define USE_WRAPPER /*#define RESET_BOOT */ @@ -89,7 +93,11 @@ /* #define SUPPORT_TAGS */ +#ifdef SUN3_SCSI_VME +#define ENABLE_IRQ() +#else #define ENABLE_IRQ() enable_irq( IRQ_SUN3_SCSI ); +#endif static irqreturn_t scsi_sun3_intr(int irq, void *dummy); @@ -126,10 +134,9 @@ static struct scsi_cmnd *sun3_dma_setup_done = NULL; static volatile unsigned char *sun3_scsi_regp; static volatile struct sun3_dma_regs *dregs; -#ifdef OLDDMA -static unsigned char *dmabuf = NULL; /* dma memory buffer */ -#endif +#ifndef SUN3_SCSI_VME static struct sun3_udc_regs *udc_regs = NULL; +#endif static unsigned char *sun3_dma_orig_addr = NULL; static unsigned long sun3_dma_orig_count = 0; static int sun3_dma_active = 0; @@ -149,6 +156,7 @@ static inline void sun3scsi_write(int reg, int value) sun3_scsi_regp[reg] = value; } +#ifndef SUN3_SCSI_VME /* dma controller register access functions */ static inline unsigned short sun3_udc_read(unsigned char reg) @@ -170,6 +178,7 @@ static inline void sun3_udc_write(unsigned short val, unsigned char reg) dregs->udc_data = val; udelay(SUN3_DMA_DELAY); } +#endif /* * XXX: status debug @@ -188,17 +197,32 @@ static struct Scsi_Host *default_instance; * */ -int __init sun3scsi_detect(struct scsi_host_template * tpnt) +static int __init sun3scsi_detect(struct scsi_host_template *tpnt) { - unsigned long ioaddr; + unsigned long ioaddr, irq; static int called = 0; struct Scsi_Host *instance; +#ifdef SUN3_SCSI_VME + int i; + unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI, + IOBASE_SUN3_VMESCSI + 0x4000, + 0 }; + unsigned long vecs[3] = { SUN3_VEC_VMESCSI0, + SUN3_VEC_VMESCSI1, + 0 }; +#endif /* check that this machine has an onboard 5380 */ switch(idprom->id_machtype) { +#ifdef SUN3_SCSI_VME + case SM_SUN3|SM_3_160: + case SM_SUN3|SM_3_260: + break; +#else case SM_SUN3|SM_3_50: case SM_SUN3|SM_3_60: break; +#endif default: return 0; @@ -207,7 +231,11 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) if(called) return 0; +#ifdef SUN3_SCSI_VME + tpnt->proc_name = "Sun3 5380 VME SCSI"; +#else tpnt->proc_name = "Sun3 5380 SCSI"; +#endif /* setup variables */ tpnt->can_queue = @@ -224,6 +252,38 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) tpnt->this_id = 7; } +#ifdef SUN3_SCSI_VME + ioaddr = 0; + for (i = 0; addrs[i] != 0; i++) { + unsigned char x; + + ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE, + SUN3_PAGE_TYPE_VME16); + irq = vecs[i]; + sun3_scsi_regp = (unsigned char *)ioaddr; + + dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8); + + if (sun3_map_test((unsigned long)dregs, &x)) { + unsigned short oldcsr; + + oldcsr = dregs->csr; + dregs->csr = 0; + udelay(SUN3_DMA_DELAY); + if (dregs->csr == 0x1400) + break; + + dregs->csr = oldcsr; + } + + iounmap((void *)ioaddr); + ioaddr = 0; + } + + if (!ioaddr) + return 0; +#else + irq = IRQ_SUN3_SCSI; ioaddr = (unsigned long)ioremap(IOBASE_SUN3_SCSI, PAGE_SIZE); sun3_scsi_regp = (unsigned char *)ioaddr; @@ -234,11 +294,6 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) printk("SUN3 Scsi couldn't allocate DVMA memory!\n"); return 0; } -#ifdef OLDDMA - if((dmabuf = dvma_malloc_align(SUN3_DVMA_BUFSIZE, 0x10000)) == NULL) { - printk("SUN3 Scsi couldn't allocate DVMA memory!\n"); - return 0; - } #endif #ifdef SUPPORT_TAGS if (setup_use_tagged_queuing < 0) @@ -252,7 +307,7 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) default_instance = instance; instance->io_port = (unsigned long) ioaddr; - instance->irq = IRQ_SUN3_SCSI; + instance->irq = irq; NCR5380_init(instance, 0); @@ -273,7 +328,8 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) #endif } - printk("scsi%d: Sun3 5380 at port %lX irq", instance->host_no, instance->io_port); + pr_info("scsi%d: %s at port %lX irq", instance->host_no, + tpnt->proc_name, instance->io_port); if (instance->irq == SCSI_IRQ_NONE) printk ("s disabled"); else @@ -290,6 +346,15 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR; udelay(SUN3_DMA_DELAY); dregs->fifo_count = 0; +#ifdef SUN3_SCSI_VME + dregs->fifo_count_hi = 0; + dregs->dma_addr_hi = 0; + dregs->dma_addr_lo = 0; + dregs->dma_count_hi = 0; + dregs->dma_count_lo = 0; + + dregs->ivect = VME_DATA24 | (instance->irq & 0xff); +#endif called = 1; @@ -357,7 +422,8 @@ static void sun3_scsi_reset_boot(struct Scsi_Host *instance) } #endif -const char * sun3scsi_info (struct Scsi_Host *spnt) { +static const char *sun3scsi_info(struct Scsi_Host *spnt) +{ return ""; } @@ -369,6 +435,10 @@ static irqreturn_t scsi_sun3_intr(int irq, void *dummy) unsigned short csr = dregs->csr; int handled = 0; +#ifdef SUN3_SCSI_VME + dregs->csr &= ~CSR_DMA_ENABLE; +#endif + if(csr & ~CSR_GOOD) { if(csr & CSR_DMA_BUSERR) { printk("scsi%d: bus error in dma\n", default_instance->host_no); @@ -412,31 +482,28 @@ void sun3_sun3_debug (void) /* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag) { -#ifdef OLDDMA - if(write_flag) - memcpy(dmabuf, data, count); - else { - sun3_dma_orig_addr = data; - sun3_dma_orig_count = count; - } -#else void *addr; if(sun3_dma_orig_addr != NULL) dvma_unmap(sun3_dma_orig_addr); -// addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf); +#ifdef SUN3_SCSI_VME + addr = (void *)dvma_map_vme((unsigned long) data, count); +#else addr = (void *)dvma_map((unsigned long) data, count); +#endif sun3_dma_orig_addr = addr; sun3_dma_orig_count = count; -#endif + +#ifndef SUN3_SCSI_VME dregs->fifo_count = 0; sun3_udc_write(UDC_RESET, UDC_CSR); /* reset fifo */ dregs->csr &= ~CSR_FIFO; dregs->csr |= CSR_FIFO; +#endif /* set direction */ if(write_flag) @@ -444,6 +511,17 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri else dregs->csr &= ~CSR_SEND; +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_PACK_ENABLE; + + dregs->dma_addr_hi = ((unsigned long)addr >> 16); + dregs->dma_addr_lo = ((unsigned long)addr & 0xffff); + + dregs->dma_count_hi = 0; + dregs->dma_count_lo = 0; + dregs->fifo_count_hi = 0; + dregs->fifo_count = 0; +#else /* byte count for fifo */ dregs->fifo_count = count; @@ -461,13 +539,8 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri } /* setup udc */ -#ifdef OLDDMA - udc_regs->addr_hi = ((dvma_vtob(dmabuf) & 0xff0000) >> 8); - udc_regs->addr_lo = (dvma_vtob(dmabuf) & 0xffff); -#else udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8); udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff); -#endif udc_regs->count = count/2; /* count in words */ udc_regs->mode_hi = UDC_MODE_HIWORD; if(write_flag) { @@ -491,11 +564,13 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri /* interrupt enable */ sun3_udc_write(UDC_INT_ENABLE, UDC_CSR); +#endif return count; } +#ifndef SUN3_SCSI_VME static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance) { unsigned short resid; @@ -508,6 +583,7 @@ static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance) return (unsigned long) resid; } +#endif static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance) { @@ -526,8 +602,23 @@ static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted, static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data) { +#ifdef SUN3_SCSI_VME + unsigned short csr; + + csr = dregs->csr; + + dregs->dma_count_hi = (sun3_dma_orig_count >> 16); + dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff); + dregs->fifo_count_hi = (sun3_dma_orig_count >> 16); + dregs->fifo_count = (sun3_dma_orig_count & 0xffff); + +/* if(!(csr & CSR_DMA_ENABLE)) + * dregs->csr |= CSR_DMA_ENABLE; + */ +#else sun3_udc_write(UDC_CHN_START, UDC_CSR); +#endif return 0; } @@ -535,12 +626,46 @@ static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data) /* clean up after our dma is done */ static int sun3scsi_dma_finish(int write_flag) { - unsigned short count; + unsigned short __maybe_unused count; unsigned short fifo; int ret = 0; sun3_dma_active = 0; -#if 1 + +#ifdef SUN3_SCSI_VME + dregs->csr &= ~CSR_DMA_ENABLE; + + fifo = dregs->fifo_count; + if (write_flag) { + if ((fifo > 0) && (fifo < sun3_dma_orig_count)) + fifo++; + } + + last_residual = fifo; + /* empty bytes from the fifo which didn't make it */ + if ((!write_flag) && (dregs->csr & CSR_LEFT)) { + unsigned char *vaddr; + + vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr); + + vaddr += (sun3_dma_orig_count - fifo); + vaddr--; + + switch (dregs->csr & CSR_LEFT) { + case CSR_LEFT_3: + *vaddr = (dregs->bpack_lo & 0xff00) >> 8; + vaddr--; + + case CSR_LEFT_2: + *vaddr = (dregs->bpack_hi & 0x00ff); + vaddr--; + + case CSR_LEFT_1: + *vaddr = (dregs->bpack_hi & 0xff00) >> 8; + break; + } + } +#else // check to empty the fifo on a read if(!write_flag) { int tmo = 20000; /* .2 sec */ @@ -556,28 +681,8 @@ static int sun3scsi_dma_finish(int write_flag) udelay(10); } } - -#endif count = sun3scsi_dma_count(default_instance); -#ifdef OLDDMA - - /* if we've finished a read, copy out the data we read */ - if(sun3_dma_orig_addr) { - /* check for residual bytes after dma end */ - if(count && (NCR5380_read(BUS_AND_STATUS_REG) & - (BASR_PHASE_MATCH | BASR_ACK))) { - printk("scsi%d: sun3_scsi_finish: read overrun baby... ", default_instance->host_no); - printk("basr now %02x\n", NCR5380_read(BUS_AND_STATUS_REG)); - ret = count; - } - - /* copy in what we dma'd no matter what */ - memcpy(sun3_dma_orig_addr, dmabuf, sun3_dma_orig_count); - sun3_dma_orig_addr = NULL; - - } -#else fifo = dregs->fifo_count; last_residual = fifo; @@ -595,10 +700,23 @@ static int sun3scsi_dma_finish(int write_flag) vaddr[-2] = (data & 0xff00) >> 8; vaddr[-1] = (data & 0xff); } +#endif dvma_unmap(sun3_dma_orig_addr); sun3_dma_orig_addr = NULL; -#endif + +#ifdef SUN3_SCSI_VME + dregs->dma_addr_hi = 0; + dregs->dma_addr_lo = 0; + dregs->dma_count_hi = 0; + dregs->dma_count_lo = 0; + + dregs->fifo_count = 0; + dregs->fifo_count_hi = 0; + + dregs->csr &= ~CSR_SEND; +/* dregs->csr |= CSR_DMA_ENABLE; */ +#else sun3_udc_write(UDC_RESET, UDC_CSR); dregs->fifo_count = 0; dregs->csr &= ~CSR_SEND; @@ -606,6 +724,7 @@ static int sun3scsi_dma_finish(int write_flag) /* reset fifo */ dregs->csr &= ~CSR_FIFO; dregs->csr |= CSR_FIFO; +#endif sun3_dma_setup_done = NULL; diff --git a/drivers/scsi/sun3_scsi_vme.c b/drivers/scsi/sun3_scsi_vme.c index 9e7974b56f12..1eeece6e2040 100644 --- a/drivers/scsi/sun3_scsi_vme.c +++ b/drivers/scsi/sun3_scsi_vme.c @@ -1,584 +1,3 @@ - /* - * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl) - * - * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net) - * - * VME support added by Sam Creasey - * - * Adapted from sun3_scsi.c -- see there for other headers - * - * TODO: modify this driver to support multiple Sun3 SCSI VME boards - * - */ - -#define AUTOSENSE - -#include <linux/types.h> -#include <linux/stddef.h> -#include <linux/ctype.h> -#include <linux/delay.h> - -#include <linux/module.h> -#include <linux/signal.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/blkdev.h> - -#include <asm/io.h> - -#include <asm/sun3ints.h> -#include <asm/dvma.h> -#include <asm/idprom.h> -#include <asm/machines.h> - #define SUN3_SCSI_VME -#undef SUN3_SCSI_DEBUG - -/* dma on! */ -#define REAL_DMA - -#include "scsi.h" -#include "initio.h" -#include <scsi/scsi_host.h> -#include "sun3_scsi.h" -#include "NCR5380.h" - -extern int sun3_map_test(unsigned long, char *); - -#define USE_WRAPPER -/*#define RESET_BOOT */ -#define DRIVER_SETUP - -/* - * BUG can be used to trigger a strange code-size related hang on 2.1 kernels - */ -#ifdef BUG -#undef RESET_BOOT -#undef DRIVER_SETUP -#endif - -/* #define SUPPORT_TAGS */ - -//#define ENABLE_IRQ() enable_irq( SUN3_VEC_VMESCSI0 ); -#define ENABLE_IRQ() - - -static irqreturn_t scsi_sun3_intr(int irq, void *dummy); -static inline unsigned char sun3scsi_read(int reg); -static inline void sun3scsi_write(int reg, int value); - -static int setup_can_queue = -1; -module_param(setup_can_queue, int, 0); -static int setup_cmd_per_lun = -1; -module_param(setup_cmd_per_lun, int, 0); -static int setup_sg_tablesize = -1; -module_param(setup_sg_tablesize, int, 0); -#ifdef SUPPORT_TAGS -static int setup_use_tagged_queuing = -1; -module_param(setup_use_tagged_queuing, int, 0); -#endif -static int setup_hostid = -1; -module_param(setup_hostid, int, 0); - -static struct scsi_cmnd *sun3_dma_setup_done = NULL; - -#define AFTER_RESET_DELAY (HZ/2) - -/* ms to wait after hitting dma regs */ -#define SUN3_DMA_DELAY 10 - -/* dvma buffer to allocate -- 32k should hopefully be more than sufficient */ -#define SUN3_DVMA_BUFSIZE 0xe000 - -/* minimum number of bytes to do dma on */ -#define SUN3_DMA_MINSIZE 128 - -static volatile unsigned char *sun3_scsi_regp; -static volatile struct sun3_dma_regs *dregs; -#ifdef OLDDMA -static unsigned char *dmabuf = NULL; /* dma memory buffer */ -#endif -static unsigned char *sun3_dma_orig_addr = NULL; -static unsigned long sun3_dma_orig_count = 0; -static int sun3_dma_active = 0; -static unsigned long last_residual = 0; - -/* - * NCR 5380 register access functions - */ - -static inline unsigned char sun3scsi_read(int reg) -{ - return( sun3_scsi_regp[reg] ); -} - -static inline void sun3scsi_write(int reg, int value) -{ - sun3_scsi_regp[reg] = value; -} - -/* - * XXX: status debug - */ -static struct Scsi_Host *default_instance; - -/* - * Function : int sun3scsi_detect(struct scsi_host_template * tpnt) - * - * Purpose : initializes mac NCR5380 driver based on the - * command line / compile time port and irq definitions. - * - * Inputs : tpnt - template for this SCSI adapter. - * - * Returns : 1 if a host adapter was found, 0 if not. - * - */ - -static int __init sun3scsi_detect(struct scsi_host_template * tpnt) -{ - unsigned long ioaddr, irq = 0; - static int called = 0; - struct Scsi_Host *instance; - int i; - unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI, - IOBASE_SUN3_VMESCSI + 0x4000, - 0 }; - unsigned long vecs[3] = { SUN3_VEC_VMESCSI0, - SUN3_VEC_VMESCSI1, - 0 }; - /* check that this machine has an onboard 5380 */ - switch(idprom->id_machtype) { - case SM_SUN3|SM_3_160: - case SM_SUN3|SM_3_260: - break; - - default: - return 0; - } - - if(called) - return 0; - - tpnt->proc_name = "Sun3 5380 VME SCSI"; - - /* setup variables */ - tpnt->can_queue = - (setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE; - tpnt->cmd_per_lun = - (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN; - tpnt->sg_tablesize = - (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE; - - if (setup_hostid >= 0) - tpnt->this_id = setup_hostid; - else { - /* use 7 as default */ - tpnt->this_id = 7; - } - - ioaddr = 0; - for(i = 0; addrs[i] != 0; i++) { - unsigned char x; - - ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE, - SUN3_PAGE_TYPE_VME16); - irq = vecs[i]; - sun3_scsi_regp = (unsigned char *)ioaddr; - - dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8); - - if(sun3_map_test((unsigned long)dregs, &x)) { - unsigned short oldcsr; - - oldcsr = dregs->csr; - dregs->csr = 0; - udelay(SUN3_DMA_DELAY); - if(dregs->csr == 0x1400) - break; - - dregs->csr = oldcsr; - } - - iounmap((void *)ioaddr); - ioaddr = 0; - } - - if(!ioaddr) - return 0; - -#ifdef SUPPORT_TAGS - if (setup_use_tagged_queuing < 0) - setup_use_tagged_queuing = USE_TAGGED_QUEUING; -#endif - - instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); - if(instance == NULL) - return 0; - - default_instance = instance; - - instance->io_port = (unsigned long) ioaddr; - instance->irq = irq; - - NCR5380_init(instance, 0); - - instance->n_io_port = 32; - - ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0; - - if (request_irq(instance->irq, scsi_sun3_intr, - 0, "Sun3SCSI-5380VME", instance)) { -#ifndef REAL_DMA - printk("scsi%d: IRQ%d not free, interrupts disabled\n", - instance->host_no, instance->irq); - instance->irq = SCSI_IRQ_NONE; -#else - printk("scsi%d: IRQ%d not free, bailing out\n", - instance->host_no, instance->irq); - return 0; -#endif - } - - printk("scsi%d: Sun3 5380 VME at port %lX irq", instance->host_no, instance->io_port); - if (instance->irq == SCSI_IRQ_NONE) - printk ("s disabled"); - else - printk (" %d", instance->irq); - printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", - instance->can_queue, instance->cmd_per_lun, - SUN3SCSI_PUBLIC_RELEASE); - printk("\nscsi%d:", instance->host_no); - NCR5380_print_options(instance); - printk("\n"); - - dregs->csr = 0; - udelay(SUN3_DMA_DELAY); - dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR; - udelay(SUN3_DMA_DELAY); - dregs->fifo_count = 0; - dregs->fifo_count_hi = 0; - dregs->dma_addr_hi = 0; - dregs->dma_addr_lo = 0; - dregs->dma_count_hi = 0; - dregs->dma_count_lo = 0; - - dregs->ivect = VME_DATA24 | (instance->irq & 0xff); - - called = 1; - -#ifdef RESET_BOOT - sun3_scsi_reset_boot(instance); -#endif - - return 1; -} - -int sun3scsi_release (struct Scsi_Host *shpnt) -{ - if (shpnt->irq != SCSI_IRQ_NONE) - free_irq(shpnt->irq, shpnt); - - iounmap((void *)sun3_scsi_regp); - - NCR5380_exit(shpnt); - return 0; -} - -#ifdef RESET_BOOT -/* - * Our 'bus reset on boot' function - */ - -static void sun3_scsi_reset_boot(struct Scsi_Host *instance) -{ - unsigned long end; - - NCR5380_local_declare(); - NCR5380_setup(instance); - - /* - * Do a SCSI reset to clean up the bus during initialization. No - * messing with the queues, interrupts, or locks necessary here. - */ - - printk( "Sun3 SCSI: resetting the SCSI bus..." ); - - /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */ -// sun3_disable_irq( IRQ_SUN3_SCSI ); - - /* get in phase */ - NCR5380_write( TARGET_COMMAND_REG, - PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) )); - - /* assert RST */ - NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST ); - - /* The min. reset hold time is 25us, so 40us should be enough */ - udelay( 50 ); - - /* reset RST and interrupt */ - NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE ); - NCR5380_read( RESET_PARITY_INTERRUPT_REG ); - - for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); ) - barrier(); - - /* switch on SCSI IRQ again */ -// sun3_enable_irq( IRQ_SUN3_SCSI ); - - printk( " done\n" ); -} -#endif - -static const char * sun3scsi_info (struct Scsi_Host *spnt) { - return ""; -} - -// safe bits for the CSR -#define CSR_GOOD 0x060f - -static irqreturn_t scsi_sun3_intr(int irq, void *dummy) -{ - unsigned short csr = dregs->csr; - int handled = 0; - - dregs->csr &= ~CSR_DMA_ENABLE; - - -#ifdef SUN3_SCSI_DEBUG - printk("scsi_intr csr %x\n", csr); -#endif - - if(csr & ~CSR_GOOD) { - if(csr & CSR_DMA_BUSERR) { - printk("scsi%d: bus error in dma\n", default_instance->host_no); -#ifdef SUN3_SCSI_DEBUG - printk("scsi: residual %x count %x addr %p dmaaddr %x\n", - dregs->fifo_count, - dregs->dma_count_lo | (dregs->dma_count_hi << 16), - sun3_dma_orig_addr, - dregs->dma_addr_lo | (dregs->dma_addr_hi << 16)); -#endif - } - - if(csr & CSR_DMA_CONFLICT) { - printk("scsi%d: dma conflict\n", default_instance->host_no); - } - handled = 1; - } - - if(csr & (CSR_SDB_INT | CSR_DMA_INT)) { - NCR5380_intr(irq, dummy); - handled = 1; - } - - return IRQ_RETVAL(handled); -} - -/* - * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk; - * reentering NCR5380_print_status seems to have ugly side effects - */ - -/* this doesn't seem to get used at all -- sam */ -#if 0 -void sun3_sun3_debug (void) -{ - unsigned long flags; - NCR5380_local_declare(); - - if (default_instance) { - local_irq_save(flags); - NCR5380_print_status(default_instance); - local_irq_restore(flags); - } -} -#endif - - -/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */ -static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag) -{ - void *addr; - - if(sun3_dma_orig_addr != NULL) - dvma_unmap(sun3_dma_orig_addr); - -// addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf); - addr = (void *)dvma_map_vme((unsigned long) data, count); - - sun3_dma_orig_addr = addr; - sun3_dma_orig_count = count; - -#ifdef SUN3_SCSI_DEBUG - printk("scsi: dma_setup addr %p count %x\n", addr, count); -#endif - -// dregs->fifo_count = 0; -#if 0 - /* reset fifo */ - dregs->csr &= ~CSR_FIFO; - dregs->csr |= CSR_FIFO; -#endif - /* set direction */ - if(write_flag) - dregs->csr |= CSR_SEND; - else - dregs->csr &= ~CSR_SEND; - - /* reset fifo */ -// dregs->csr &= ~CSR_FIFO; -// dregs->csr |= CSR_FIFO; - - dregs->csr |= CSR_PACK_ENABLE; - - dregs->dma_addr_hi = ((unsigned long)addr >> 16); - dregs->dma_addr_lo = ((unsigned long)addr & 0xffff); - - dregs->dma_count_hi = 0; - dregs->dma_count_lo = 0; - dregs->fifo_count_hi = 0; - dregs->fifo_count = 0; - -#ifdef SUN3_SCSI_DEBUG - printk("scsi: dma_setup done csr %x\n", dregs->csr); -#endif - return count; - -} - -static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance) -{ - return last_residual; -} - -static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted, - struct scsi_cmnd *cmd, - int write_flag) -{ - if (cmd->request->cmd_type == REQ_TYPE_FS) - return wanted; - else - return 0; -} - -static int sun3scsi_dma_start(unsigned long count, char *data) -{ - - unsigned short csr; - - csr = dregs->csr; -#ifdef SUN3_SCSI_DEBUG - printk("scsi: dma_start data %p count %x csr %x fifo %x\n", data, count, csr, dregs->fifo_count); -#endif - - dregs->dma_count_hi = (sun3_dma_orig_count >> 16); - dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff); - - dregs->fifo_count_hi = (sun3_dma_orig_count >> 16); - dregs->fifo_count = (sun3_dma_orig_count & 0xffff); - -// if(!(csr & CSR_DMA_ENABLE)) -// dregs->csr |= CSR_DMA_ENABLE; - - return 0; -} - -/* clean up after our dma is done */ -static int sun3scsi_dma_finish(int write_flag) -{ - unsigned short fifo; - int ret = 0; - - sun3_dma_active = 0; - - dregs->csr &= ~CSR_DMA_ENABLE; - - fifo = dregs->fifo_count; - if(write_flag) { - if((fifo > 0) && (fifo < sun3_dma_orig_count)) - fifo++; - } - - last_residual = fifo; -#ifdef SUN3_SCSI_DEBUG - printk("scsi: residual %x total %x\n", fifo, sun3_dma_orig_count); -#endif - /* empty bytes from the fifo which didn't make it */ - if((!write_flag) && (dregs->csr & CSR_LEFT)) { - unsigned char *vaddr; - -#ifdef SUN3_SCSI_DEBUG - printk("scsi: got left over bytes\n"); -#endif - - vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr); - - vaddr += (sun3_dma_orig_count - fifo); - vaddr--; - - switch(dregs->csr & CSR_LEFT) { - case CSR_LEFT_3: - *vaddr = (dregs->bpack_lo & 0xff00) >> 8; - vaddr--; - - case CSR_LEFT_2: - *vaddr = (dregs->bpack_hi & 0x00ff); - vaddr--; - - case CSR_LEFT_1: - *vaddr = (dregs->bpack_hi & 0xff00) >> 8; - break; - } - - - } - - dvma_unmap(sun3_dma_orig_addr); - sun3_dma_orig_addr = NULL; - - dregs->dma_addr_hi = 0; - dregs->dma_addr_lo = 0; - dregs->dma_count_hi = 0; - dregs->dma_count_lo = 0; - - dregs->fifo_count = 0; - dregs->fifo_count_hi = 0; - - dregs->csr &= ~CSR_SEND; - -// dregs->csr |= CSR_DMA_ENABLE; - -#if 0 - /* reset fifo */ - dregs->csr &= ~CSR_FIFO; - dregs->csr |= CSR_FIFO; -#endif - sun3_dma_setup_done = NULL; - - return ret; - -} - -#include "sun3_NCR5380.c" - -static struct scsi_host_template driver_template = { - .name = SUN3_SCSI_NAME, - .detect = sun3scsi_detect, - .release = sun3scsi_release, - .info = sun3scsi_info, - .queuecommand = sun3scsi_queue_command, - .eh_abort_handler = sun3scsi_abort, - .eh_bus_reset_handler = sun3scsi_bus_reset, - .can_queue = CAN_QUEUE, - .this_id = 7, - .sg_tablesize = SG_TABLESIZE, - .cmd_per_lun = CMD_PER_LUN, - .use_clustering = DISABLE_CLUSTERING -}; - - -#include "scsi_module.c" - -MODULE_LICENSE("GPL"); +#include "sun3_scsi.c" |
