diff options
Diffstat (limited to 'kernel/drivers/scsi/arm/oak.c')
| -rw-r--r-- | kernel/drivers/scsi/arm/oak.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/kernel/drivers/scsi/arm/oak.c b/kernel/drivers/scsi/arm/oak.c new file mode 100644 index 000000000..7c6fa1479 --- /dev/null +++ b/kernel/drivers/scsi/arm/oak.c @@ -0,0 +1,207 @@ +/* + * Oak Generic NCR5380 driver + * + * Copyright 1995-2002, Russell King + */ + +#include <linux/module.h> +#include <linux/signal.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 <scsi/scsi_host.h> + +/*#define PSEUDO_DMA*/ +#define DONT_USE_INTR + +#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) +#define NCR5380_local_declare() void __iomem *_base +#define NCR5380_setup(host) _base = priv(host)->base + +#define NCR5380_read(reg) readb(_base + ((reg) << 2)) +#define NCR5380_write(reg, value) writeb(value, _base + ((reg) << 2)) +#define NCR5380_queue_command oakscsi_queue_command +#define NCR5380_info oakscsi_info +#define NCR5380_show_info oakscsi_show_info + +#define NCR5380_implementation_fields \ + void __iomem *base + +#include "../NCR5380.h" + +#undef START_DMA_INITIATOR_RECEIVE_REG +#define START_DMA_INITIATOR_RECEIVE_REG (128 + 7) + +#define STAT ((128 + 16) << 2) +#define DATA ((128 + 8) << 2) + +static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr, + int len) +{ + void __iomem *base = priv(instance)->base; + +printk("writing %p len %d\n",addr, len); + if(!len) return -1; + + while(1) + { + int status; + while (((status = readw(base + STAT)) & 0x100)==0); + } +} + +static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr, + int len) +{ + void __iomem *base = priv(instance)->base; +printk("reading %p len %d\n", addr, len); + while(len > 0) + { + unsigned int status, timeout; + unsigned long b; + + timeout = 0x01FFFFFF; + + while (((status = readw(base + STAT)) & 0x100)==0) + { + timeout--; + if(status & 0x200 || !timeout) + { + printk("status = %08X\n", status); + return 1; + } + } + + if(len >= 128) + { + readsw(base + DATA, addr, 128); + addr += 128; + len -= 128; + } + else + { + b = (unsigned long) readw(base + DATA); + *addr ++ = b; + len -= 1; + if(len) + *addr ++ = b>>8; + len -= 1; + } + } + return 0; +} + +#undef STAT +#undef DATA + +#include "../NCR5380.c" + +static struct scsi_host_template oakscsi_template = { + .module = THIS_MODULE, + .show_info = oakscsi_show_info, + .name = "Oak 16-bit SCSI", + .info = oakscsi_info, + .queuecommand = oakscsi_queue_command, + .eh_abort_handler = NCR5380_abort, + .eh_bus_reset_handler = NCR5380_bus_reset, + .can_queue = 16, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 2, + .use_clustering = DISABLE_CLUSTERING, + .proc_name = "oakscsi", +}; + +static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) +{ + struct Scsi_Host *host; + int ret = -ENOMEM; + + ret = ecard_request_resources(ec); + if (ret) + goto out; + + host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata)); + if (!host) { + ret = -ENOMEM; + goto release; + } + + priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), + ecard_resource_len(ec, ECARD_RES_MEMC)); + if (!priv(host)->base) { + ret = -ENOMEM; + goto unreg; + } + + host->irq = NO_IRQ; + host->n_io_port = 255; + + NCR5380_init(host, 0); + + ret = scsi_add_host(host, &ec->dev); + if (ret) + goto out_unmap; + + scsi_scan_host(host); + goto out; + + out_unmap: + iounmap(priv(host)->base); + unreg: + scsi_host_put(host); + release: + ecard_release_resources(ec); + out: + return ret; +} + +static void 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); + iounmap(priv(host)->base); + scsi_host_put(host); + ecard_release_resources(ec); +} + +static const struct ecard_id oakscsi_cids[] = { + { MANU_OAK, PROD_OAK_SCSI }, + { 0xffff, 0xffff } +}; + +static struct ecard_driver oakscsi_driver = { + .probe = oakscsi_probe, + .remove = 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"); + |