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 int sim710_probe_common(struct device *dev, unsigned long base_addr,
98			       int irq, int clock, int differential,
99			       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 int sim710_device_remove(struct device *dev)
157{
158	struct Scsi_Host *host = dev_get_drvdata(dev);
159	struct NCR_700_Host_Parameters *hostdata =
160		(struct NCR_700_Host_Parameters *)host->hostdata[0];
161
162	scsi_remove_host(host);
163	NCR_700_release(host);
164	kfree(hostdata);
165	free_irq(host->irq, host);
166	release_region(host->base, 64);
167	return 0;
168}
169
170#ifdef CONFIG_EISA
171static struct eisa_device_id sim710_eisa_ids[] = {
172	{ "CPQ4410" },
173	{ "CPQ4411" },
174	{ "HWP0C80" },
175	{ "" }
176};
177MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
178
179static __init int
180sim710_eisa_probe(struct device *dev)
181{
182	struct eisa_device *edev = to_eisa_device(dev);
183	unsigned long io_addr = edev->base_addr;
184	char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
185	char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
186	char *eisa_irqs;
187	unsigned char irq_index;
188	unsigned char irq, differential = 0, scsi_id = 7;
189
190	if(strcmp(edev->id.sig, "HWP0C80") == 0) {
191		__u8 val;
192		eisa_irqs =  eisa_hwp_irqs;
193		irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
194
195		val = inb(io_addr + 0x4);
196		scsi_id = ffs(val) - 1;
197
198		if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
199			printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
200			scsi_id = 7;
201		}
202	} else {
203		eisa_irqs = eisa_cpq_irqs;
204		irq_index = inb(io_addr + 0xc88) & 0x07;
205	}
206
207	if(irq_index >= strlen(eisa_irqs)) {
208		printk("sim710.c: irq nasty\n");
209		return -ENODEV;
210	}
211
212	irq = eisa_irqs[irq_index];
213
214	return sim710_probe_common(dev, io_addr, irq, 50,
215				   differential, scsi_id);
216}
217
218static struct eisa_driver sim710_eisa_driver = {
219	.id_table		= sim710_eisa_ids,
220	.driver = {
221		.name		= "sim710",
222		.probe		= sim710_eisa_probe,
223		.remove		= sim710_device_remove,
224	},
225};
226#endif /* CONFIG_EISA */
227
228static int __init sim710_init(void)
229{
230	int err = -ENODEV;
231
232#ifdef MODULE
233	if (sim710)
234		param_setup(sim710);
235#endif
236
237#ifdef CONFIG_EISA
238	err = eisa_driver_register(&sim710_eisa_driver);
239#endif
240	/* FIXME: what we'd really like to return here is -ENODEV if
241	 * no devices have actually been found.  Instead, the err
242	 * above actually only reports problems with kobject_register,
243	 * so for the moment return success */
244
245	return 0;
246}
247
248static void __exit sim710_exit(void)
249{
250#ifdef CONFIG_EISA
251	eisa_driver_unregister(&sim710_eisa_driver);
252#endif
253}
254
255module_init(sim710_init);
256module_exit(sim710_exit);
257