| /* | |
| * 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 | |
| */ | |
| /* | |
| * $Log: mac_NCR5380.c,v $ | |
| */ | |
| #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 <linux/interrupt.h> | |
| #include <asm/io.h> | |
| #include <asm/irq.h> | |
| #include <asm/macintosh.h> | |
| #include <asm/macints.h> | |
| #include <asm/mac_via.h> | |
| #include "scsi.h" | |
| #include <scsi/scsi_host.h> | |
| #include "mac_scsi.h" | |
| /* These control the behaviour of the generic 5380 core */ | |
| #define AUTOSENSE | |
| #define PSEUDO_DMA | |
| #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 | |
| extern void via_scsi_clear(void); | |
| #ifdef RESET_BOOT | |
| static void mac_scsi_reset_boot(struct Scsi_Host *instance); | |
| #endif | |
| static int setup_called = 0; | |
| static int setup_can_queue = -1; | |
| static int setup_cmd_per_lun = -1; | |
| static int setup_sg_tablesize = -1; | |
| static int setup_use_pdma = -1; | |
| #ifdef SUPPORT_TAGS | |
| static int setup_use_tagged_queuing = -1; | |
| #endif | |
| static int setup_hostid = -1; | |
| /* 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; | |
| /* | |
| * NCR 5380 register access functions | |
| */ | |
| #if 0 | |
| /* Debug versions */ | |
| #define CTRL(p,v) (*ctrl = (v)) | |
| 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); | |
| i = in_8(iobase + (reg<<4)); | |
| 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); | |
| out_8(iobase + (reg<<4), value); | |
| CTRL(iobase, 0x40); | |
| } | |
| #else | |
| /* Fast versions */ | |
| static __inline__ char macscsi_read(struct Scsi_Host *instance, int reg) | |
| { | |
| return in_8(instance->io_port + (reg<<4)); | |
| } | |
| static __inline__ void macscsi_write(struct Scsi_Host *instance, int reg, int value) | |
| { | |
| out_8(instance->io_port + (reg<<4), value); | |
| } | |
| #endif | |
| /* | |
| * Function : mac_scsi_setup(char *str) | |
| * | |
| * Purpose : booter command line initialization of the overrides array, | |
| * | |
| * Inputs : str - comma delimited list of options | |
| * | |
| */ | |
| static int __init mac_scsi_setup(char *str) { | |
| #ifdef DRIVER_SETUP | |
| int ints[7]; | |
| (void)get_options( str, ARRAY_SIZE(ints), ints); | |
| if (setup_called++ || ints[0] < 1 || ints[0] > 6) { | |
| printk(KERN_WARNING "scsi: <mac5380>" | |
| " Usage: mac5380=<can_queue>[,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>,<use_pdma>]\n"); | |
| printk(KERN_ALERT "scsi: <mac5380> Bad Penguin parameters?\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(KERN_WARNING "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]; | |
| } | |
| if (ints[0] == 6) { | |
| if (ints[6] >= 0) | |
| setup_use_pdma = ints[6]; | |
| } | |
| #else | |
| if (ints[0] == 5) { | |
| if (ints[5] >= 0) | |
| setup_use_pdma = ints[5]; | |
| } | |
| #endif /* SUPPORT_TAGS */ | |
| #endif /* DRIVER_SETUP */ | |
| return 1; | |
| } | |
| __setup("mac5380=", mac_scsi_setup); | |
| /* | |
| * Function : int macscsi_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. | |
| * | |
| */ | |
| int __init macscsi_detect(struct scsi_host_template * tpnt) | |
| { | |
| static int called = 0; | |
| int flags = 0; | |
| struct Scsi_Host *instance; | |
| if (!MACH_IS_MAC || called) | |
| return( 0 ); | |
| if (macintosh_config->scsi_type != MAC_SCSI_OLD) | |
| return( 0 ); | |
| /* 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 = USE_TAGGED_QUEUING; | |
| #endif | |
| /* Once we support multiple 5380s (e.g. DuoDock) we'll do | |
| something different here */ | |
| instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); | |
| if (instance == NULL) | |
| return 0; | |
| if (macintosh_config->ident == MAC_MODEL_IIFX) { | |
| mac_scsi_regp = via1+0x8000; | |
| mac_scsi_drq = via1+0xE000; | |
| mac_scsi_nodrq = via1+0xC000; | |
| /* The IIFX should be able to do true DMA, but pseudo-dma doesn't work */ | |
| flags = FLAG_NO_PSEUDO_DMA; | |
| } else { | |
| mac_scsi_regp = via1+0x10000; | |
| mac_scsi_drq = via1+0x6000; | |
| mac_scsi_nodrq = via1+0x12000; | |
| } | |
| if (! setup_use_pdma) | |
| flags = FLAG_NO_PSEUDO_DMA; | |
| 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, flags); | |
| instance->n_io_port = 255; | |
| ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0; | |
| if (instance->irq != SCSI_IRQ_NONE) | |
| if (request_irq(instance->irq, NCR5380_intr, 0, "ncr5380", instance)) { | |
| printk(KERN_WARNING "scsi%d: IRQ%d not free, interrupts disabled\n", | |
| instance->host_no, instance->irq); | |
| instance->irq = SCSI_IRQ_NONE; | |
| } | |
| printk(KERN_INFO "scsi%d: generic 5380 at port %lX irq", instance->host_no, instance->io_port); | |
| if (instance->irq == SCSI_IRQ_NONE) | |
| printk (KERN_INFO "s disabled"); | |
| else | |
| printk (KERN_INFO " %d", instance->irq); | |
| printk(KERN_INFO " options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", | |
| instance->can_queue, instance->cmd_per_lun, MACSCSI_PUBLIC_RELEASE); | |
| printk(KERN_INFO "\nscsi%d:", instance->host_no); | |
| NCR5380_print_options(instance); | |
| printk("\n"); | |
| called = 1; | |
| return 1; | |
| } | |
| int macscsi_release (struct Scsi_Host *shpnt) | |
| { | |
| if (shpnt->irq != SCSI_IRQ_NONE) | |
| free_irq(shpnt->irq, shpnt); | |
| NCR5380_exit(shpnt); | |
| 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(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." ); | |
| /* 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(); | |
| printk(KERN_INFO " done\n" ); | |
| } | |
| #endif | |
| const char * macscsi_info (struct Scsi_Host *spnt) { | |
| return ""; | |
| } | |
| /* | |
| Pseudo-DMA: (Ove Edlund) | |
| The code attempts to catch bus errors that occur if one for example | |
| "trips over the cable". | |
| XXX: Since bus errors in the PDMA routines never happen on my | |
| computer, the bus error code is untested. | |
| If the code works as intended, a bus error results in Pseudo-DMA | |
| beeing disabled, meaning that the driver switches to slow handshake. | |
| If bus errors are NOT extremely rare, this has to be changed. | |
| */ | |
| #define CP_IO_TO_MEM(s,d,len) \ | |
| __asm__ __volatile__ \ | |
| (" cmp.w #4,%2\n" \ | |
| " bls 8f\n" \ | |
| " move.w %1,%%d0\n" \ | |
| " neg.b %%d0\n" \ | |
| " and.w #3,%%d0\n" \ | |
| " sub.w %%d0,%2\n" \ | |
| " bra 2f\n" \ | |
| " 1: move.b (%0),(%1)+\n" \ | |
| " 2: dbf %%d0,1b\n" \ | |
| " move.w %2,%%d0\n" \ | |
| " lsr.w #5,%%d0\n" \ | |
| " bra 4f\n" \ | |
| " 3: move.l (%0),(%1)+\n" \ | |
| "31: move.l (%0),(%1)+\n" \ | |
| "32: move.l (%0),(%1)+\n" \ | |
| "33: move.l (%0),(%1)+\n" \ | |
| "34: move.l (%0),(%1)+\n" \ | |
| "35: move.l (%0),(%1)+\n" \ | |
| "36: move.l (%0),(%1)+\n" \ | |
| "37: move.l (%0),(%1)+\n" \ | |
| " 4: dbf %%d0,3b\n" \ | |
| " move.w %2,%%d0\n" \ | |
| " lsr.w #2,%%d0\n" \ | |
| " and.w #7,%%d0\n" \ | |
| " bra 6f\n" \ | |
| " 5: move.l (%0),(%1)+\n" \ | |
| " 6: dbf %%d0,5b\n" \ | |
| " and.w #3,%2\n" \ | |
| " bra 8f\n" \ | |
| " 7: move.b (%0),(%1)+\n" \ | |
| " 8: dbf %2,7b\n" \ | |
| " moveq.l #0, %2\n" \ | |
| " 9: \n" \ | |
| ".section .fixup,\"ax\"\n" \ | |
| " .even\n" \ | |
| "90: moveq.l #1, %2\n" \ | |
| " jra 9b\n" \ | |
| ".previous\n" \ | |
| ".section __ex_table,\"a\"\n" \ | |
| " .align 4\n" \ | |
| " .long 1b,90b\n" \ | |
| " .long 3b,90b\n" \ | |
| " .long 31b,90b\n" \ | |
| " .long 32b,90b\n" \ | |
| " .long 33b,90b\n" \ | |
| " .long 34b,90b\n" \ | |
| " .long 35b,90b\n" \ | |
| " .long 36b,90b\n" \ | |
| " .long 37b,90b\n" \ | |
| " .long 5b,90b\n" \ | |
| " .long 7b,90b\n" \ | |
| ".previous" \ | |
| : "=a"(s), "=a"(d), "=d"(len) \ | |
| : "0"(s), "1"(d), "2"(len) \ | |
| : "d0") | |
| static int macscsi_pread (struct Scsi_Host *instance, | |
| unsigned char *dst, int len) | |
| { | |
| unsigned char *d; | |
| volatile unsigned char *s; | |
| NCR5380_local_declare(); | |
| NCR5380_setup(instance); | |
| s = mac_scsi_drq+0x60; | |
| d = dst; | |
| /* These conditions are derived from MacOS */ | |
| while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) | |
| && !(NCR5380_read(STATUS_REG) & SR_REQ)) | |
| ; | |
| if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) | |
| && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) { | |
| printk(KERN_ERR "Error in macscsi_pread\n"); | |
| return -1; | |
| } | |
| CP_IO_TO_MEM(s, d, len); | |
| if (len != 0) { | |
| printk(KERN_NOTICE "Bus error in macscsi_pread\n"); | |
| return -1; | |
| } | |
| return 0; | |
| } | |
| #define CP_MEM_TO_IO(s,d,len) \ | |
| __asm__ __volatile__ \ | |
| (" cmp.w #4,%2\n" \ | |
| " bls 8f\n" \ | |
| " move.w %0,%%d0\n" \ | |
| " neg.b %%d0\n" \ | |
| " and.w #3,%%d0\n" \ | |
| " sub.w %%d0,%2\n" \ | |
| " bra 2f\n" \ | |
| " 1: move.b (%0)+,(%1)\n" \ | |
| " 2: dbf %%d0,1b\n" \ | |
| " move.w %2,%%d0\n" \ | |
| " lsr.w #5,%%d0\n" \ | |
| " bra 4f\n" \ | |
| " 3: move.l (%0)+,(%1)\n" \ | |
| "31: move.l (%0)+,(%1)\n" \ | |
| "32: move.l (%0)+,(%1)\n" \ | |
| "33: move.l (%0)+,(%1)\n" \ | |
| "34: move.l (%0)+,(%1)\n" \ | |
| "35: move.l (%0)+,(%1)\n" \ | |
| "36: move.l (%0)+,(%1)\n" \ | |
| "37: move.l (%0)+,(%1)\n" \ | |
| " 4: dbf %%d0,3b\n" \ | |
| " move.w %2,%%d0\n" \ | |
| " lsr.w #2,%%d0\n" \ | |
| " and.w #7,%%d0\n" \ | |
| " bra 6f\n" \ | |
| " 5: move.l (%0)+,(%1)\n" \ | |
| " 6: dbf %%d0,5b\n" \ | |
| " and.w #3,%2\n" \ | |
| " bra 8f\n" \ | |
| " 7: move.b (%0)+,(%1)\n" \ | |
| " 8: dbf %2,7b\n" \ | |
| " moveq.l #0, %2\n" \ | |
| " 9: \n" \ | |
| ".section .fixup,\"ax\"\n" \ | |
| " .even\n" \ | |
| "90: moveq.l #1, %2\n" \ | |
| " jra 9b\n" \ | |
| ".previous\n" \ | |
| ".section __ex_table,\"a\"\n" \ | |
| " .align 4\n" \ | |
| " .long 1b,90b\n" \ | |
| " .long 3b,90b\n" \ | |
| " .long 31b,90b\n" \ | |
| " .long 32b,90b\n" \ | |
| " .long 33b,90b\n" \ | |
| " .long 34b,90b\n" \ | |
| " .long 35b,90b\n" \ | |
| " .long 36b,90b\n" \ | |
| " .long 37b,90b\n" \ | |
| " .long 5b,90b\n" \ | |
| " .long 7b,90b\n" \ | |
| ".previous" \ | |
| : "=a"(s), "=a"(d), "=d"(len) \ | |
| : "0"(s), "1"(d), "2"(len) \ | |
| : "d0") | |
| static int macscsi_pwrite (struct Scsi_Host *instance, | |
| unsigned char *src, int len) | |
| { | |
| unsigned char *s; | |
| volatile unsigned char *d; | |
| NCR5380_local_declare(); | |
| NCR5380_setup(instance); | |
| s = src; | |
| d = mac_scsi_drq; | |
| /* These conditions are derived from MacOS */ | |
| while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) | |
| && (!(NCR5380_read(STATUS_REG) & SR_REQ) | |
| || (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))) | |
| ; | |
| if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) { | |
| printk(KERN_ERR "Error in macscsi_pwrite\n"); | |
| return -1; | |
| } | |
| CP_MEM_TO_IO(s, d, len); | |
| if (len != 0) { | |
| printk(KERN_NOTICE "Bus error in macscsi_pwrite\n"); | |
| return -1; | |
| } | |
| return 0; | |
| } | |
| #include "NCR5380.c" | |
| static struct scsi_host_template driver_template = { | |
| .proc_name = "Mac5380", | |
| .show_info = macscsi_show_info, | |
| .write_info = macscsi_write_info, | |
| .name = "Macintosh NCR5380 SCSI", | |
| .detect = macscsi_detect, | |
| .release = macscsi_release, | |
| .info = macscsi_info, | |
| .queuecommand = macscsi_queue_command, | |
| .eh_abort_handler = macscsi_abort, | |
| .eh_bus_reset_handler = macscsi_bus_reset, | |
| .can_queue = CAN_QUEUE, | |
| .this_id = 7, | |
| .sg_tablesize = SG_ALL, | |
| .cmd_per_lun = CMD_PER_LUN, | |
| .use_clustering = DISABLE_CLUSTERING | |
| }; | |
| #include "scsi_module.c" |