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