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