diff options
Diffstat (limited to 'drivers/scsi/arm/oak.c')
| -rw-r--r-- | drivers/scsi/arm/oak.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/scsi/arm/oak.c b/drivers/scsi/arm/oak.c new file mode 100644 index 000000000000..ff2554f4cb80 --- /dev/null +++ b/drivers/scsi/arm/oak.c @@ -0,0 +1,217 @@ +/* + * Oak Generic NCR5380 driver + * + * Copyright 1995-2002, Russell King + */ + +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/blkdev.h> +#include <linux/init.h> + +#include <asm/ecard.h> +#include <asm/io.h> +#include <asm/system.h> + +#include "../scsi.h" +#include <scsi/scsi_host.h> + +#define AUTOSENSE +/*#define PSEUDO_DMA*/ + +#define OAKSCSI_PUBLIC_RELEASE 1 + +#define NCR5380_read(reg) oakscsi_read(_instance, reg) +#define NCR5380_write(reg, value) oakscsi_write(_instance, reg, value) +#define NCR5380_intr oakscsi_intr +#define NCR5380_queue_command oakscsi_queue_command +#define NCR5380_proc_info oakscsi_proc_info + +#define NCR5380_implementation_fields int port, ctrl +#define NCR5380_local_declare() struct Scsi_Host *_instance +#define NCR5380_setup(instance) _instance = instance + +#define BOARD_NORMAL 0 +#define BOARD_NCR53C400 1 + +#include "../NCR5380.h" + +#undef START_DMA_INITIATOR_RECEIVE_REG +#define START_DMA_INITIATOR_RECEIVE_REG (7 + 128) + +const char * oakscsi_info (struct Scsi_Host *spnt) +{ + return ""; +} + +#define STAT(p) inw(p + 144) +extern void inswb(int from, void *to, int len); + +static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr, + int len) +{ + int iobase = instance->io_port; +printk("writing %p len %d\n",addr, len); + if(!len) return -1; + + while(1) + { + int status; + while(((status = STAT(iobase)) & 0x100)==0); + } +} + +static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr, + int len) +{ + int iobase = instance->io_port; +printk("reading %p len %d\n", addr, len); + while(len > 0) + { + int status, timeout; + unsigned long b; + + timeout = 0x01FFFFFF; + + while(((status = STAT(iobase)) & 0x100)==0) + { + timeout--; + if(status & 0x200 || !timeout) + { + printk("status = %08X\n",status); + return 1; + } + } + if(len >= 128) + { + inswb(iobase + 136, addr, 128); + addr += 128; + len -= 128; + } + else + { + b = (unsigned long) inw(iobase + 136); + *addr ++ = b; + len -= 1; + if(len) + *addr ++ = b>>8; + len -= 1; + } + } + return 0; +} + +#define oakscsi_read(instance,reg) (inb((instance)->io_port + (reg))) +#define oakscsi_write(instance,reg,val) (outb((val), (instance)->io_port + (reg))) + +#undef STAT + +#include "../NCR5380.c" + +static Scsi_Host_Template oakscsi_template = { + .module = THIS_MODULE, + .proc_info = oakscsi_proc_info, + .name = "Oak 16-bit SCSI", + .info = oakscsi_info, + .queuecommand = oakscsi_queue_command, + .eh_abort_handler = NCR5380_abort, + .eh_device_reset_handler= NCR5380_device_reset, + .eh_bus_reset_handler = NCR5380_bus_reset, + .eh_host_reset_handler = NCR5380_host_reset, + .can_queue = 16, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 2, + .use_clustering = DISABLE_CLUSTERING, + .proc_name = "oakscsi", +}; + +static int __devinit +oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) +{ + struct Scsi_Host *host; + int ret = -ENOMEM; + + host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata)); + if (!host) + goto out; + + host->io_port = ecard_address(ec, ECARD_MEMC, 0); + host->irq = IRQ_NONE; + host->n_io_port = 255; + + ret = -EBUSY; + if (!request_region (host->io_port, host->n_io_port, "Oak SCSI")) + goto unreg; + + NCR5380_init(host, 0); + + printk("scsi%d: at port 0x%08lx irqs disabled", + host->host_no, host->io_port); + printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", + host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE); + printk("\nscsi%d:", host->host_no); + NCR5380_print_options(host); + printk("\n"); + + ret = scsi_add_host(host, &ec->dev); + if (ret) + goto out_release; + + scsi_scan_host(host); + goto out; + + out_release: + release_region(host->io_port, host->n_io_port); + unreg: + scsi_host_put(host); + out: + return ret; +} + +static void __devexit oakscsi_remove(struct expansion_card *ec) +{ + struct Scsi_Host *host = ecard_get_drvdata(ec); + + ecard_set_drvdata(ec, NULL); + scsi_remove_host(host); + + NCR5380_exit(host); + release_region(host->io_port, host->n_io_port); + scsi_host_put(host); +} + +static const struct ecard_id oakscsi_cids[] = { + { MANU_OAK, PROD_OAK_SCSI }, + { 0xffff, 0xffff } +}; + +static struct ecard_driver oakscsi_driver = { + .probe = oakscsi_probe, + .remove = __devexit_p(oakscsi_remove), + .id_table = oakscsi_cids, + .drv = { + .name = "oakscsi", + }, +}; + +static int __init oakscsi_init(void) +{ + return ecard_register_driver(&oakscsi_driver); +} + +static void __exit oakscsi_exit(void) +{ + ecard_remove_driver(&oakscsi_driver); +} + +module_init(oakscsi_init); +module_exit(oakscsi_exit); + +MODULE_AUTHOR("Russell King"); +MODULE_DESCRIPTION("Oak SCSI driver"); +MODULE_LICENSE("GPL"); + |