diff options
Diffstat (limited to 'kernel/drivers/scsi/sim710.c')
| -rw-r--r-- | kernel/drivers/scsi/sim710.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/kernel/drivers/scsi/sim710.c b/kernel/drivers/scsi/sim710.c new file mode 100644 index 000000000..3b3b56f4a --- /dev/null +++ b/kernel/drivers/scsi/sim710.c @@ -0,0 +1,256 @@ +/* + * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk> + * + *---------------------------------------------------------------------------- + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + *---------------------------------------------------------------------------- + * + * MCA card detection code by Trent McNair. (now deleted) + * Fixes to not explicitly nul bss data from Xavier Bestel. + * Some multiboard fixes from Rolf Eike Beer. + * Auto probing of EISA config space from Trevor Hemsley. + * + * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com + * + */ + +#include <linux/module.h> +#include <linux/slab.h> + +#include <linux/blkdev.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/eisa.h> +#include <linux/interrupt.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_transport.h> +#include <scsi/scsi_transport_spi.h> + +#include "53c700.h" + + +/* Must be enough for EISA */ +#define MAX_SLOTS 8 +static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 }; + +static char *sim710; /* command line passed by insmod */ + +MODULE_AUTHOR("Richard Hirst"); +MODULE_DESCRIPTION("Simple NCR53C710 driver"); +MODULE_LICENSE("GPL"); + +module_param(sim710, charp, 0); + +#ifdef MODULE +#define ARG_SEP ' ' +#else +#define ARG_SEP ',' +#endif + +static __init int +param_setup(char *str) +{ + char *pos = str, *next; + int slot = -1; + + while(pos != NULL && (next = strchr(pos, ':')) != NULL) { + int val = (int)simple_strtoul(++next, NULL, 0); + + if(!strncmp(pos, "slot:", 5)) + slot = val; + else if(!strncmp(pos, "id:", 3)) { + if(slot == -1) { + printk(KERN_WARNING "sim710: Must specify slot for id parameter\n"); + } else if(slot >= MAX_SLOTS) { + printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val); + } else { + id_array[slot] = val; + } + } + if((pos = strchr(pos, ARG_SEP)) != NULL) + pos++; + } + return 1; +} +__setup("sim710=", param_setup); + +static struct scsi_host_template sim710_driver_template = { + .name = "LSI (Symbios) 710 EISA", + .proc_name = "sim710", + .this_id = 7, + .module = THIS_MODULE, +}; + +static int sim710_probe_common(struct device *dev, unsigned long base_addr, + int irq, int clock, int differential, + int scsi_id) +{ + struct Scsi_Host * host = NULL; + struct NCR_700_Host_Parameters *hostdata = + kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); + + printk(KERN_NOTICE "sim710: %s\n", dev_name(dev)); + printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n", + irq, clock, base_addr, scsi_id); + + if(hostdata == NULL) { + printk(KERN_ERR "sim710: Failed to allocate host data\n"); + goto out; + } + + if(request_region(base_addr, 64, "sim710") == NULL) { + printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n", + base_addr); + goto out_free; + } + + /* Fill in the three required pieces of hostdata */ + hostdata->base = ioport_map(base_addr, 64); + hostdata->differential = differential; + hostdata->clock = clock; + hostdata->chip710 = 1; + hostdata->burst_length = 8; + + /* and register the chip */ + if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev)) + == NULL) { + printk(KERN_ERR "sim710: No host detected; card configuration problem?\n"); + goto out_release; + } + host->this_id = scsi_id; + host->base = base_addr; + host->irq = irq; + if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) { + printk(KERN_ERR "sim710: request_irq failed\n"); + goto out_put_host; + } + + dev_set_drvdata(dev, host); + scsi_scan_host(host); + + return 0; + + out_put_host: + scsi_host_put(host); + out_release: + release_region(base_addr, 64); + out_free: + kfree(hostdata); + out: + return -ENODEV; +} + +static int sim710_device_remove(struct device *dev) +{ + struct Scsi_Host *host = dev_get_drvdata(dev); + struct NCR_700_Host_Parameters *hostdata = + (struct NCR_700_Host_Parameters *)host->hostdata[0]; + + scsi_remove_host(host); + NCR_700_release(host); + kfree(hostdata); + free_irq(host->irq, host); + release_region(host->base, 64); + return 0; +} + +#ifdef CONFIG_EISA +static struct eisa_device_id sim710_eisa_ids[] = { + { "CPQ4410" }, + { "CPQ4411" }, + { "HWP0C80" }, + { "" } +}; +MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids); + +static __init int +sim710_eisa_probe(struct device *dev) +{ + struct eisa_device *edev = to_eisa_device(dev); + unsigned long io_addr = edev->base_addr; + char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 }; + char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0}; + char *eisa_irqs; + unsigned char irq_index; + unsigned char irq, differential = 0, scsi_id = 7; + + if(strcmp(edev->id.sig, "HWP0C80") == 0) { + __u8 val; + eisa_irqs = eisa_hwp_irqs; + irq_index = (inb(io_addr + 0xc85) & 0x7) - 1; + + val = inb(io_addr + 0x4); + scsi_id = ffs(val) - 1; + + if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) { + printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev)); + scsi_id = 7; + } + } else { + eisa_irqs = eisa_cpq_irqs; + irq_index = inb(io_addr + 0xc88) & 0x07; + } + + if(irq_index >= strlen(eisa_irqs)) { + printk("sim710.c: irq nasty\n"); + return -ENODEV; + } + + irq = eisa_irqs[irq_index]; + + return sim710_probe_common(dev, io_addr, irq, 50, + differential, scsi_id); +} + +static struct eisa_driver sim710_eisa_driver = { + .id_table = sim710_eisa_ids, + .driver = { + .name = "sim710", + .probe = sim710_eisa_probe, + .remove = sim710_device_remove, + }, +}; +#endif /* CONFIG_EISA */ + +static int __init sim710_init(void) +{ + int err = -ENODEV; + +#ifdef MODULE + if (sim710) + param_setup(sim710); +#endif + +#ifdef CONFIG_EISA + err = eisa_driver_register(&sim710_eisa_driver); +#endif + /* FIXME: what we'd really like to return here is -ENODEV if + * no devices have actually been found. Instead, the err + * above actually only reports problems with kobject_register, + * so for the moment return success */ + + return 0; +} + +static void __exit sim710_exit(void) +{ +#ifdef CONFIG_EISA + eisa_driver_unregister(&sim710_eisa_driver); +#endif +} + +module_init(sim710_init); +module_exit(sim710_exit); |