1/*
  2 * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
  3 *
  4 *----------------------------------------------------------------------------
  5 *  This program is free software; you can redistribute it and/or modify
  6 *  it under the terms of the GNU General Public License as published by 
  7 *  the Free Software Foundation; either version 2 of the License, or
  8 *  (at your option) any later version.
  9 *
 10 *  This program is distributed in the hope that it will be useful,
 11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13 *  GNU General Public License for more details.
 14 *
 15 *  You should have received a copy of the GNU General Public License
 16 *  along with this program; if not, write to the Free Software
 17 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 18 *----------------------------------------------------------------------------
 19 *
 20 * MCA card detection code by Trent McNair. (now deleted)
 21 * Fixes to not explicitly nul bss data from Xavier Bestel.
 22 * Some multiboard fixes from Rolf Eike Beer.
 23 * Auto probing of EISA config space from Trevor Hemsley.
 24 *
 25 * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com
 26 *
 27 */
 28
 29#include <linux/module.h>
 30#include <linux/slab.h>
 31
 32#include <linux/blkdev.h>
 33#include <linux/device.h>
 34#include <linux/init.h>
 35#include <linux/eisa.h>
 36#include <linux/interrupt.h>
 37#include <scsi/scsi_host.h>
 38#include <scsi/scsi_device.h>
 39#include <scsi/scsi_transport.h>
 40#include <scsi/scsi_transport_spi.h>
 41
 42#include "53c700.h"
 43
 44
 45/* Must be enough for EISA */
 46#define MAX_SLOTS 8
 47static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };
 48
 49static char *sim710;		/* command line passed by insmod */
 50
 51MODULE_AUTHOR("Richard Hirst");
 52MODULE_DESCRIPTION("Simple NCR53C710 driver");
 53MODULE_LICENSE("GPL");
 54
 55module_param(sim710, charp, 0);
 56
 57#ifdef MODULE
 58#define ARG_SEP ' '
 59#else
 60#define ARG_SEP ','
 61#endif
 62
 63static __init int
 64param_setup(char *str)
 65{
 66	char *pos = str, *next;
 67	int slot = -1;
 68
 69	while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
 70		int val = (int)simple_strtoul(++next, NULL, 0);
 71
 72		if(!strncmp(pos, "slot:", 5))
 73			slot = val;
 74		else if(!strncmp(pos, "id:", 3)) {
 75			if(slot == -1) {
 76				printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
 77			} else if(slot >= MAX_SLOTS) {
 78				printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
 79			} else {
 80				id_array[slot] = val;
 81			}
 82		}
 83		if((pos = strchr(pos, ARG_SEP)) != NULL)
 84			pos++;
 85	}
 86	return 1;
 87}
 88__setup("sim710=", param_setup);
 89
 90static struct scsi_host_template sim710_driver_template = {
 91	.name			= "LSI (Symbios) 710 EISA",
 92	.proc_name		= "sim710",
 93	.this_id		= 7,
 94	.module			= THIS_MODULE,
 95};
 96
 97static __devinit int
 98sim710_probe_common(struct device *dev, unsigned long base_addr,
 99		    int irq, int clock, int differential, int scsi_id)
100{
101	struct Scsi_Host * host = NULL;
102	struct NCR_700_Host_Parameters *hostdata =
103		kzalloc(sizeof(struct NCR_700_Host_Parameters),	GFP_KERNEL);
104
105	printk(KERN_NOTICE "sim710: %s\n", dev_name(dev));
106	printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n",
107	       irq, clock, base_addr, scsi_id);
108
109	if(hostdata == NULL) {
110		printk(KERN_ERR "sim710: Failed to allocate host data\n");
111		goto out;
112	}
113
114	if(request_region(base_addr, 64, "sim710") == NULL) {
115		printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n",
116		       base_addr);
117		goto out_free;
118	}
119
120	/* Fill in the three required pieces of hostdata */
121	hostdata->base = ioport_map(base_addr, 64);
122	hostdata->differential = differential;
123	hostdata->clock = clock;
124	hostdata->chip710 = 1;
125	hostdata->burst_length = 8;
126
127	/* and register the chip */
128	if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev))
129	   == NULL) {
130		printk(KERN_ERR "sim710: No host detected; card configuration problem?\n");
131		goto out_release;
132	}
133	host->this_id = scsi_id;
134	host->base = base_addr;
135	host->irq = irq;
136	if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) {
137		printk(KERN_ERR "sim710: request_irq failed\n");
138		goto out_put_host;
139	}
140
141	dev_set_drvdata(dev, host);
142	scsi_scan_host(host);
143
144	return 0;
145
146 out_put_host:
147	scsi_host_put(host);
148 out_release:
149	release_region(base_addr, 64);
150 out_free:
151	kfree(hostdata);
152 out:
153	return -ENODEV;
154}
155
156static __devexit int
157sim710_device_remove(struct device *dev)
158{
159	struct Scsi_Host *host = dev_get_drvdata(dev);
160	struct NCR_700_Host_Parameters *hostdata =
161		(struct NCR_700_Host_Parameters *)host->hostdata[0];
162
163	scsi_remove_host(host);
164	NCR_700_release(host);
165	kfree(hostdata);
166	free_irq(host->irq, host);
167	release_region(host->base, 64);
168	return 0;
169}
170
171#ifdef CONFIG_EISA
172static struct eisa_device_id sim710_eisa_ids[] = {
173	{ "CPQ4410" },
174	{ "CPQ4411" },
175	{ "HWP0C80" },
176	{ "" }
177};
178MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
179
180static __init int
181sim710_eisa_probe(struct device *dev)
182{
183	struct eisa_device *edev = to_eisa_device(dev);
184	unsigned long io_addr = edev->base_addr;
185	char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
186	char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
187	char *eisa_irqs;
188	unsigned char irq_index;
189	unsigned char irq, differential = 0, scsi_id = 7;
190
191	if(strcmp(edev->id.sig, "HWP0C80") == 0) {
192		__u8 val;
193		eisa_irqs =  eisa_hwp_irqs;
194		irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
195
196		val = inb(io_addr + 0x4);
197		scsi_id = ffs(val) - 1;
198
199		if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
200			printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
201			scsi_id = 7;
202		}
203	} else {
204		eisa_irqs = eisa_cpq_irqs;
205		irq_index = inb(io_addr + 0xc88) & 0x07;
206	}
207
208	if(irq_index >= strlen(eisa_irqs)) {
209		printk("sim710.c: irq nasty\n");
210		return -ENODEV;
211	}
212
213	irq = eisa_irqs[irq_index];
214		
215	return sim710_probe_common(dev, io_addr, irq, 50,
216				   differential, scsi_id);
217}
218
219static struct eisa_driver sim710_eisa_driver = {
220	.id_table		= sim710_eisa_ids,
221	.driver = {
222		.name		= "sim710",
223		.probe		= sim710_eisa_probe,
224		.remove		= __devexit_p(sim710_device_remove),
225	},
226};
227#endif /* CONFIG_EISA */
228
229static int __init sim710_init(void)
230{
231	int err = -ENODEV;
232
233#ifdef MODULE
234	if (sim710)
235		param_setup(sim710);
236#endif
237
238#ifdef CONFIG_EISA
239	err = eisa_driver_register(&sim710_eisa_driver);
240#endif
241	/* FIXME: what we'd really like to return here is -ENODEV if
242	 * no devices have actually been found.  Instead, the err
243	 * above actually only reports problems with kobject_register,
244	 * so for the moment return success */
245
246	return 0;
247}
248
249static void __exit sim710_exit(void)
250{
251#ifdef CONFIG_EISA
252	eisa_driver_unregister(&sim710_eisa_driver);
253#endif
254}
255
256module_init(sim710_init);
257module_exit(sim710_exit);