diff options
Diffstat (limited to 'drivers/scsi/mac_scsi.c')
| -rw-r--r-- | drivers/scsi/mac_scsi.c | 554 |
1 files changed, 237 insertions, 317 deletions
diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c index 6a039eb1cbce..1e85c07e3b62 100644 --- a/drivers/scsi/mac_scsi.c +++ b/drivers/scsi/mac_scsi.c @@ -9,69 +9,62 @@ * 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 */ #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 <linux/platform_device.h> +#include <asm/hwtest.h> #include <asm/io.h> -#include <asm/irq.h> - -#include <asm/macintosh.h> #include <asm/macints.h> -#include <asm/mac_via.h> +#include <asm/setup.h> -#include "scsi.h" #include <scsi/scsi_host.h> -#include "mac_scsi.h" -/* These control the behaviour of the generic 5380 core */ -#define AUTOSENSE +/* Definitions for the core NCR5380 driver. */ + #define PSEUDO_DMA -#include "NCR5380.h" +#define NCR5380_implementation_fields unsigned char *pdma_base +#define NCR5380_local_declare() struct Scsi_Host *_instance +#define NCR5380_setup(instance) _instance = instance -#define RESET_BOOT -#define DRIVER_SETUP +#define NCR5380_read(reg) macscsi_read(_instance, reg) +#define NCR5380_write(reg, value) macscsi_write(_instance, reg, value) -extern void via_scsi_clear(void); +#define NCR5380_pread macscsi_pread +#define NCR5380_pwrite macscsi_pwrite -#ifdef RESET_BOOT -static void mac_scsi_reset_boot(struct Scsi_Host *instance); -#endif +#define NCR5380_intr macscsi_intr +#define NCR5380_queue_command macscsi_queue_command +#define NCR5380_abort macscsi_abort +#define NCR5380_bus_reset macscsi_bus_reset +#define NCR5380_info macscsi_info +#define NCR5380_show_info macscsi_show_info +#define NCR5380_write_info macscsi_write_info + +#include "NCR5380.h" + +#define RESET_BOOT -static int setup_called = 0; 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); static int setup_use_pdma = -1; -#ifdef SUPPORT_TAGS +module_param(setup_use_pdma, int, 0); static int setup_use_tagged_queuing = -1; -#endif +module_param(setup_use_tagged_queuing, int, 0); static int setup_hostid = -1; +module_param(setup_hostid, int, 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 @@ -84,232 +77,48 @@ static int setup_hostid = -1; #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) +static inline 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; + return in_8(instance->base + (reg << 4)); } -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) +static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value) { - return in_8(instance->io_port + (reg<<4)); + out_8(instance->base + (reg << 4), value); } -static __inline__ void macscsi_write(struct Scsi_Host *instance, int reg, int value) +#ifndef MODULE +static int __init mac_scsi_setup(char *str) { - out_8(instance->io_port + (reg<<4), value); -} -#endif - + int ints[7]; -/* - * Function : mac_scsi_setup(char *str) - * - * Purpose : booter command line initialization of the overrides array, - * - * Inputs : str - comma delimited list of options - * - */ + (void)get_options(str, ARRAY_SIZE(ints), ints); -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] < 1 || ints[0] > 6) { + pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>]]]]]\n"); + return 0; } - - if (ints[0] == 6) { - if (ints[6] >= 0) + if (ints[0] >= 1) + setup_can_queue = ints[1]; + if (ints[0] >= 2) + setup_cmd_per_lun = ints[2]; + if (ints[0] >= 3) + setup_sg_tablesize = ints[3]; + if (ints[0] >= 4) + setup_hostid = ints[4]; + if (ints[0] >= 5) + setup_use_tagged_queuing = ints[5]; + if (ints[0] >= 6) 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; -} +#endif /* !MODULE */ #ifdef RESET_BOOT /* @@ -349,10 +158,7 @@ static void mac_scsi_reset_boot(struct Scsi_Host *instance) } #endif -const char * macscsi_info (struct Scsi_Host *spnt) { - return ""; -} - +#ifdef PSEUDO_DMA /* Pseudo-DMA: (Ove Edlund) The code attempts to catch bus errors that occur if one for example @@ -360,7 +166,7 @@ const char * macscsi_info (struct Scsi_Host *spnt) { 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. + being disabled, meaning that the driver switches to slow handshake. If bus errors are NOT extremely rare, this has to be changed. */ @@ -422,38 +228,39 @@ __asm__ __volatile__ \ : "0"(s), "1"(d), "2"(len) \ : "d0") - -static int macscsi_pread (struct Scsi_Host *instance, - unsigned char *dst, int len) +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; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + unsigned char *d; + unsigned char *s; + + NCR5380_local_declare(); + NCR5380_setup(instance); + + s = hostdata->pdma_base + (INPUT_DATA_REG << 4); + 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)) { + pr_err("Error in macscsi_pread\n"); + return -1; + } + + CP_IO_TO_MEM(s, d, len); + + if (len != 0) { + pr_notice("Bus error in macscsi_pread\n"); + return -1; + } + + return 0; } @@ -515,59 +322,172 @@ __asm__ __volatile__ \ : "0"(s), "1"(d), "2"(len) \ : "d0") -static int macscsi_pwrite (struct Scsi_Host *instance, - unsigned char *src, int len) +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; -} + struct NCR5380_hostdata *hostdata = shost_priv(instance); + unsigned char *s; + unsigned char *d; + + NCR5380_local_declare(); + NCR5380_setup(instance); + + s = src; + d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4); + + /* 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)) { + pr_err("Error in macscsi_pwrite\n"); + return -1; + } + + CP_MEM_TO_IO(s, d, len); + + if (len != 0) { + pr_notice("Bus error in macscsi_pwrite\n"); + return -1; + } + return 0; +} +#endif #include "NCR5380.c" -static struct scsi_host_template driver_template = { - .proc_name = "Mac5380", +#define DRV_MODULE_NAME "mac_scsi" +#define PFX DRV_MODULE_NAME ": " + +static struct scsi_host_template mac_scsi_template = { + .module = THIS_MODULE, + .proc_name = DRV_MODULE_NAME, .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, + .can_queue = 16, .this_id = 7, .sg_tablesize = SG_ALL, - .cmd_per_lun = CMD_PER_LUN, + .cmd_per_lun = 2, .use_clustering = DISABLE_CLUSTERING }; +static int __init mac_scsi_probe(struct platform_device *pdev) +{ + struct Scsi_Host *instance; + int error; + int host_flags = 0; + struct resource *irq, *pio_mem, *pdma_mem = NULL; + + pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!pio_mem) + return -ENODEV; + +#ifdef PSEUDO_DMA + pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); +#endif + + irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + + if (!hwreg_present((unsigned char *)pio_mem->start + + (STATUS_REG << 4))) { + pr_info(PFX "no device detected at %pap\n", &pio_mem->start); + return -ENODEV; + } + + if (setup_can_queue > 0) + mac_scsi_template.can_queue = setup_can_queue; + if (setup_cmd_per_lun > 0) + mac_scsi_template.cmd_per_lun = setup_cmd_per_lun; + if (setup_sg_tablesize >= 0) + mac_scsi_template.sg_tablesize = setup_sg_tablesize; + if (setup_hostid >= 0) + mac_scsi_template.this_id = setup_hostid & 7; + if (setup_use_pdma < 0) + setup_use_pdma = 0; + + instance = scsi_host_alloc(&mac_scsi_template, + sizeof(struct NCR5380_hostdata)); + if (!instance) + return -ENOMEM; + + instance->base = pio_mem->start; + if (irq) + instance->irq = irq->start; + else + instance->irq = NO_IRQ; + + if (pdma_mem && setup_use_pdma) { + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + hostdata->pdma_base = (unsigned char *)pdma_mem->start; + } else + host_flags |= FLAG_NO_PSEUDO_DMA; + +#ifdef RESET_BOOT + mac_scsi_reset_boot(instance); +#endif + +#ifdef SUPPORT_TAGS + host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0; +#endif + + NCR5380_init(instance, host_flags); + + if (instance->irq != NO_IRQ) { + error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED, + "NCR5380", instance); + if (error) + goto fail_irq; + } + + error = scsi_add_host(instance, NULL); + if (error) + goto fail_host; + + platform_set_drvdata(pdev, instance); + + scsi_scan_host(instance); + return 0; + +fail_host: + if (instance->irq != NO_IRQ) + free_irq(instance->irq, instance); +fail_irq: + NCR5380_exit(instance); + scsi_host_put(instance); + return error; +} + +static int __exit mac_scsi_remove(struct platform_device *pdev) +{ + struct Scsi_Host *instance = platform_get_drvdata(pdev); + + scsi_remove_host(instance); + if (instance->irq != NO_IRQ) + free_irq(instance->irq, instance); + NCR5380_exit(instance); + scsi_host_put(instance); + return 0; +} + +static struct platform_driver mac_scsi_driver = { + .remove = __exit_p(mac_scsi_remove), + .driver = { + .name = DRV_MODULE_NAME, + .owner = THIS_MODULE, + }, +}; + +module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe); -#include "scsi_module.c" +MODULE_ALIAS("platform:" DRV_MODULE_NAME); +MODULE_LICENSE("GPL"); |