| /* |
| * Generic Macintosh NCR5380 driver |
| * |
| * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov> |
| * |
| * derived in part from: |
| */ |
| /* |
| * Generic Generic NCR5380 driver |
| * |
| * Copyright 1995, Russell King |
| * |
| * ALPHA RELEASE 1. |
| * |
| * For more information, please consult |
| * |
| * NCR 5380 Family |
| * SCSI Protocol Controller |
| * Databook |
| * |
| * NCR Microelectronics |
| * 1635 Aeroplaza Drive |
| * Colorado Springs, CO 80916 |
| * 1+ (719) 578-3400 |
| * 1+ (800) 334-5454 |
| */ |
| |
| |
| /* |
| * Options : |
| * |
| * PARITY - enable parity checking. Not supported. |
| * |
| * SCSI2 - enable support for SCSI-II tagged queueing. Untested. |
| * |
| * USLEEP - enable support for devices that don't disconnect. Untested. |
| */ |
| |
| /* |
| * $Log: mac_NCR5380.c,v $ |
| */ |
| |
| #define AUTOSENSE |
| #if 0 |
| #define PSEUDO_DMA |
| #endif |
| |
| #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/sched.h> |
| #include <linux/ioport.h> |
| #include <linux/init.h> |
| #include <linux/blk.h> |
| |
| #include <asm/io.h> |
| #include <asm/irq.h> |
| #include <asm/system.h> |
| |
| #include <asm/macintosh.h> |
| #include <asm/macints.h> |
| #include <asm/machw.h> |
| #include <asm/mac_via.h> |
| |
| #include "scsi.h" |
| #include "hosts.h" |
| #include "mac_scsi.h" |
| #include "NCR5380.h" |
| |
| #if 0 |
| #define NDEBUG (NDEBUG_INTR | NDEBUG_PSEUDO_DMA | NDEBUG_ARBITRATION | NDEBUG_SELECTION | NDEBUG_RESELECTION) |
| #else |
| #define NDEBUG (NDEBUG_ABORT) |
| #endif |
| |
| #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 ENABLE_IRQ() mac_enable_irq( IRQ_MAC_SCSI ); |
| #define DISABLE_IRQ() mac_disable_irq( IRQ_MAC_SCSI ); |
| |
| #ifdef RESET_BOOT |
| static void mac_scsi_reset_boot(struct Scsi_Host *instance); |
| #endif |
| static char macscsi_read(struct Scsi_Host *instance, int reg); |
| static void macscsi_write(struct Scsi_Host *instance, int reg, int value); |
| |
| static int setup_can_queue = -1; |
| static int setup_cmd_per_lun = -1; |
| static int setup_sg_tablesize = -1; |
| #ifdef SUPPORT_TAGS |
| static int setup_use_tagged_queuing = -1; |
| #endif |
| static int setup_hostid = -1; |
| |
| static int polled_scsi_on = 0; |
| |
| /* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms, |
| * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more |
| * need ten times the standard value... */ |
| #define TOSHIBA_DELAY |
| |
| #ifdef TOSHIBA_DELAY |
| #define AFTER_RESET_DELAY (5*HZ/2) |
| #else |
| #define AFTER_RESET_DELAY (HZ/2) |
| #endif |
| |
| static volatile unsigned char *mac_scsi_regp = NULL; |
| static volatile unsigned char *mac_scsi_drq = NULL; |
| static volatile unsigned char *mac_scsi_nodrq = NULL; |
| |
| /* |
| * Function : mac_scsi_setup(char *str, int *ints) |
| * |
| * Purpose : booter command line initialization of the overrides array, |
| * |
| * Inputs : str - unused, ints - array of integer parameters with ints[0] |
| * equal to the number of ints. |
| * |
| */ |
| |
| static int __init mac_scsi_setup(char *str, int *ints) { |
| #ifdef DRIVER_SETUP |
| /* Format of mac5380 parameter is: |
| * mac5380=<can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags> |
| * Negative values mean don't change. |
| */ |
| |
| /* Grmbl... the standard parameter parsing can't handle negative numbers |
| * :-( So let's do it ourselves! |
| */ |
| |
| int i = ints[0]+1, fact; |
| |
| while( str && (isdigit(*str) || *str == '-') && i <= 10) { |
| if (*str == '-') |
| fact = -1, ++str; |
| else |
| fact = 1; |
| ints[i++] = simple_strtoul( str, NULL, 0 ) * fact; |
| if ((str = strchr( str, ',' )) != NULL) |
| ++str; |
| } |
| ints[0] = i-1; |
| |
| if (ints[0] < 1) { |
| printk( "mac_scsi_setup: no arguments!\n" ); |
| return 0; |
| } |
| |
| if (ints[0] >= 1) { |
| if (ints[1] > 0) |
| /* no limits on this, just > 0 */ |
| setup_can_queue = ints[1]; |
| } |
| if (ints[0] >= 2) { |
| if (ints[2] > 0) |
| setup_cmd_per_lun = ints[2]; |
| } |
| if (ints[0] >= 3) { |
| if (ints[3] >= 0) { |
| setup_sg_tablesize = ints[3]; |
| /* Must be <= SG_ALL (255) */ |
| if (setup_sg_tablesize > SG_ALL) |
| setup_sg_tablesize = SG_ALL; |
| } |
| } |
| if (ints[0] >= 4) { |
| /* Must be between 0 and 7 */ |
| if (ints[4] >= 0 && ints[4] <= 7) |
| setup_hostid = ints[4]; |
| else if (ints[4] > 7) |
| printk( "mac_scsi_setup: invalid host ID %d !\n", ints[4] ); |
| } |
| #ifdef SUPPORT_TAGS |
| if (ints[0] >= 5) { |
| if (ints[5] >= 0) |
| setup_use_tagged_queuing = !!ints[5]; |
| } |
| #endif |
| #endif |
| return 1; |
| } |
| |
| __setup("mac5380=", mac_scsi_setup); |
| |
| #if 0 |
| #define MAC_ADDRESS(card) (ecard_address((card), ECARD_IOC, ECARD_SLOW) + 0x800) |
| #define MAC_IRQ(card) ((card)->irq) |
| #endif |
| |
| /* |
| * XXX: status debug |
| */ |
| static struct Scsi_Host *default_instance; |
| |
| /* |
| * Function : int macscsi_detect(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. |
| * |
| */ |
| |
| int macscsi_detect(Scsi_Host_Template * tpnt) |
| { |
| int count = 0; |
| static int called = 0; |
| struct Scsi_Host *instance; |
| |
| if (!MACH_IS_MAC || called) |
| return( 0 ); |
| |
| if (macintosh_config->scsi_type != MAC_SCSI_OLD) |
| return( 0 ); |
| |
| tpnt->proc_name = "mac5380"; |
| |
| /* 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; |
| } |
| |
| #ifdef SUPPORT_TAGS |
| if (setup_use_tagged_queuing < 0) |
| setup_use_tagged_queuing = DEFAULT_USE_TAGGED_QUEUING; |
| #endif |
| |
| #if 0 /* loop over multiple adapters (Powerbooks ??) */ |
| for (count = 0; count < mac_num_scsi; count++) { |
| #endif |
| instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); |
| if(instance == NULL) |
| continue; |
| default_instance = instance; |
| |
| if (macintosh_config->ident == MAC_MODEL_IIFX) { |
| mac_scsi_regp = via1+0x8000; |
| mac_scsi_drq = via1+0xE000; |
| mac_scsi_nodrq = via1+0xC000; |
| } else { |
| mac_scsi_regp = via1+0x10000; |
| mac_scsi_drq = via1+0x6000; |
| mac_scsi_nodrq = via1+0x12000; |
| } |
| |
| |
| instance->io_port = (unsigned long) mac_scsi_regp; |
| instance->irq = IRQ_MAC_SCSI; |
| |
| #ifdef RESET_BOOT |
| mac_scsi_reset_boot(instance); |
| #endif |
| |
| NCR5380_init(instance, 0); |
| |
| instance->n_io_port = 255; |
| |
| ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0; |
| |
| if (instance->irq != IRQ_NONE) |
| if (request_irq(instance->irq, NCR5380_intr, IRQ_FLG_SLOW, "ncr5380", NCR5380_intr)) { |
| printk("scsi%d: IRQ%d not free, interrupts disabled\n", |
| instance->host_no, instance->irq); |
| instance->irq = IRQ_NONE; |
| } |
| |
| printk("scsi%d: generic 5380 at port %lX irq", instance->host_no, instance->io_port); |
| if (instance->irq == 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, MACSCSI_PUBLIC_RELEASE); |
| printk("\nscsi%d:", instance->host_no); |
| NCR5380_print_options(instance); |
| printk("\n"); |
| #if 0 /* multiple adapters */ |
| } |
| #endif |
| called = 1; |
| return 1; |
| |
| } |
| |
| int macscsi_release (struct Scsi_Host *shpnt) |
| { |
| if (shpnt->irq != IRQ_NONE) |
| free_irq (shpnt->irq, NCR5380_intr); |
| |
| return 0; |
| } |
| |
| #ifdef RESET_BOOT |
| /* |
| * Our 'bus reset on boot' function |
| */ |
| |
| static void mac_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( "Macintosh SCSI: resetting the SCSI bus..." ); |
| |
| /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */ |
| mac_disable_irq(IRQ_MAC_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 */ |
| mac_enable_irq(IRQ_MAC_SCSI); |
| |
| printk( " done\n" ); |
| } |
| #endif |
| |
| const char * macscsi_info (struct Scsi_Host *spnt) { |
| return ""; |
| } |
| |
| void restore_irq(struct pt_regs *regs) |
| { |
| unsigned long flags; |
| |
| local_save_flags(flags); |
| flags = (flags & ~0x0700) | (regs->sr & 0x0700); |
| local_irq_restore(flags); |
| } |
| |
| /* |
| * pseudo-DMA transfer functions, copied and modified from Russel King's |
| * ARM 5380 driver (cumana_1) |
| * |
| * Work in progress (sort of), didn't work last time I checked, don't use! |
| */ |
| |
| #ifdef NOT_EFFICIENT |
| #define CTRL(p,v) outb(*ctrl = (v), (p) - 577) |
| #define STAT(p) inb((p)+1) |
| #define IN(p) inb((p)) |
| #define OUT(v,p) outb((v), (p)) |
| #else |
| #if 0 |
| #define CTRL(p,v) (p[-2308] = (*ctrl = (v))) |
| #else |
| #define CTRL(p,v) (*ctrl = (v)) |
| #endif |
| #define STAT(p) (p[1<<4]) |
| #define IN(p) (*(p)) |
| #define IN2(p) ((unsigned short)(*(volatile unsigned long *)(p))) |
| #define OUT(v,p) (*(p) = (v)) |
| #define OUT2(v,p) (*((volatile unsigned long *)(p)) = (v)) |
| #endif |
| #define L(v) (((v)<<16)|((v) & 0x0000ffff)) |
| #define H(v) (((v)>>16)|((v) & 0xffff0000)) |
| #define ioaddr(v) (v) |
| |
| static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr, |
| int len) |
| { |
| int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl; |
| int oldctrl = *ctrl; |
| unsigned long *laddr; |
| #ifdef NOT_EFFICIENT |
| int iobase = instance->io_port; |
| int dma_io = mac_scsi_nodrq; |
| #else |
| volatile unsigned char *iobase = (unsigned char *)ioaddr(instance->io_port); |
| volatile unsigned char *dma_io = (unsigned char *)(mac_scsi_nodrq); |
| #endif |
| |
| if(!len) return 0; |
| |
| CTRL(iobase, 0x02); |
| laddr = (unsigned long *)addr; |
| while(len >= 32) |
| { |
| int status; |
| unsigned long v; |
| status = STAT(iobase); |
| if(status & 0x80) |
| goto end; |
| if(!(status & 0x40)) |
| continue; |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io); |
| len -= 32; |
| if(len == 0) |
| break; |
| } |
| |
| addr = (unsigned char *)laddr; |
| CTRL(iobase, 0x12); |
| while(len > 0) |
| { |
| int status; |
| status = STAT(iobase); |
| if(status & 0x80) |
| goto end; |
| if(status & 0x40) |
| { |
| OUT(*addr++, dma_io); |
| if(--len == 0) |
| break; |
| } |
| |
| status = STAT(iobase); |
| if(status & 0x80) |
| goto end; |
| if(status & 0x40) |
| { |
| OUT(*addr++, dma_io); |
| if(--len == 0) |
| break; |
| } |
| } |
| end: |
| CTRL(iobase, oldctrl|0x40); |
| return len; |
| } |
| |
| static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr, |
| int len) |
| { |
| int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl; |
| int oldctrl = *ctrl; |
| unsigned long *laddr; |
| #ifdef NOT_EFFICIENT |
| int iobase = instance->io_port; |
| int dma_io = mac_scsi_nodrq; |
| #else |
| volatile unsigned char *iobase = (unsigned char *)ioaddr(instance->io_port); |
| volatile unsigned char *dma_io = (unsigned char *)((int)mac_scsi_nodrq); |
| #endif |
| |
| if(!len) return 0; |
| |
| CTRL(iobase, 0x00); |
| laddr = (unsigned long *)addr; |
| while(len >= 32) |
| { |
| int status; |
| status = STAT(iobase); |
| if(status & 0x80) |
| goto end; |
| if(!(status & 0x40)) |
| continue; |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16); |
| len -= 32; |
| if(len == 0) |
| break; |
| } |
| |
| addr = (unsigned char *)laddr; |
| CTRL(iobase, 0x10); |
| while(len > 0) |
| { |
| int status; |
| status = STAT(iobase); |
| if(status & 0x80) |
| goto end; |
| if(status & 0x40) |
| { |
| *addr++ = IN(dma_io); |
| if(--len == 0) |
| break; |
| } |
| |
| status = STAT(iobase); |
| if(status & 0x80) |
| goto end; |
| if(status & 0x40) |
| { |
| *addr++ = IN(dma_io); |
| if(--len == 0) |
| break; |
| } |
| } |
| end: |
| CTRL(iobase, oldctrl|0x40); |
| return len; |
| } |
| |
| #undef STAT |
| #undef CTRL |
| #undef IN |
| #undef OUT |
| |
| /* |
| * NCR 5380 register access functions |
| */ |
| |
| #ifdef ORIG |
| #if 0 |
| #define CTRL(p,v) outb(*ctrl = (v), (p) - 577) |
| #else |
| #define CTRL(p,v) (*ctrl = (v)) |
| #endif |
| |
| static char macscsi_read(struct Scsi_Host *instance, int reg) |
| { |
| int iobase = instance->io_port; |
| int i; |
| int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl; |
| |
| CTRL(iobase, 0); |
| #if 0 |
| i = inb(iobase + 64 + reg); |
| #else |
| i = inb(iobase + reg<<4); |
| #endif |
| CTRL(iobase, 0x40); |
| |
| return i; |
| } |
| |
| static void macscsi_write(struct Scsi_Host *instance, int reg, int value) |
| { |
| int iobase = instance->io_port; |
| int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl; |
| |
| CTRL(iobase, 0); |
| #if 0 |
| outb(value, iobase + 64 + reg); |
| #else |
| outb(value, iobase + reg<<4); |
| #endif |
| CTRL(iobase, 0x40); |
| } |
| |
| #undef CTRL |
| |
| #else |
| static char macscsi_read(struct Scsi_Host *instance, int reg) |
| { |
| return( mac_scsi_regp[reg << 4] ); |
| } |
| |
| static void macscsi_write(struct Scsi_Host *instance, int reg, int value) |
| { |
| mac_scsi_regp[reg << 4] = value; |
| } |
| |
| #endif |
| |
| #include "NCR5380.c" |
| |
| /* |
| * 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 |
| */ |
| |
| void scsi_mac_debug (void) |
| { |
| unsigned long flags; |
| NCR5380_local_declare(); |
| |
| if (default_instance) { |
| #if 0 |
| NCR5380_setup(default_instance); |
| if(NCR5380_read(BUS_AND_STATUS_REG)&BASR_IRQ) |
| #endif |
| local_irq_save(flags); |
| NCR5380_print_status(default_instance); |
| local_irq_restore(flags); |
| } |
| #if 0 |
| polled_scsi_on = 1; |
| #endif |
| } |
| /* |
| * Helper function for interrupt trouble. More ugly side effects here. |
| */ |
| |
| void scsi_mac_polled (void) |
| { |
| unsigned long flags; |
| NCR5380_local_declare(); |
| struct Scsi_Host *instance; |
| |
| #if 0 |
| for (instance = first_instance; instance && (instance->hostt == |
| the_template); instance = instance->next) |
| if (instance->irq == IRQ_MAC_SCSI && polled_scsi_on) { |
| #else |
| instance = default_instance; |
| #endif |
| NCR5380_setup(instance); |
| if(NCR5380_read(BUS_AND_STATUS_REG)&BASR_IRQ) |
| { |
| printk("SCSI poll\n"); |
| local_irq_save(flags); |
| NCR5380_intr(IRQ_MAC_SCSI, instance, NULL); |
| local_irq_restore(flags); |
| } |
| #if 0 |
| } |
| #endif |
| } |
| |
| |
| |
| static Scsi_Host_Template driver_template = MAC_NCR5380; |
| |
| #include "scsi_module.c" |