1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
4 *
5 *----------------------------------------------------------------------------
6 *----------------------------------------------------------------------------
7 *
8 * MCA card detection code by Trent McNair. (now deleted)
9 * Fixes to not explicitly nul bss data from Xavier Bestel.
10 * Some multiboard fixes from Rolf Eike Beer.
11 * Auto probing of EISA config space from Trevor Hemsley.
12 *
13 * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com
14 */
15
16 #include <linux/module.h>
17 #include <linux/slab.h>
18
19 #include <linux/blkdev.h>
20 #include <linux/device.h>
21 #include <linux/init.h>
22 #include <linux/eisa.h>
23 #include <linux/interrupt.h>
24 #include <scsi/scsi_host.h>
25 #include <scsi/scsi_device.h>
26 #include <scsi/scsi_transport.h>
27 #include <scsi/scsi_transport_spi.h>
28
29 #include "53c700.h"
30
31
32 /* Must be enough for EISA */
33 #define MAX_SLOTS 8
34 static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };
35
36 static char *sim710; /* command line passed by insmod */
37
38 MODULE_AUTHOR("Richard Hirst");
39 MODULE_DESCRIPTION("Simple NCR53C710 driver");
40 MODULE_LICENSE("GPL");
41
42 module_param(sim710, charp, 0);
43
44 #ifdef MODULE
45 #define ARG_SEP ' '
46 #else
47 #define ARG_SEP ','
48 #endif
49
50 static __init int
param_setup(char * str)51 param_setup(char *str)
52 {
53 char *pos = str, *next;
54 int slot = -1;
55
56 while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
57 int val = (int)simple_strtoul(++next, NULL, 0);
58
59 if(!strncmp(pos, "slot:", 5))
60 slot = val;
61 else if(!strncmp(pos, "id:", 3)) {
62 if(slot == -1) {
63 printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
64 } else if(slot >= MAX_SLOTS) {
65 printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
66 } else {
67 id_array[slot] = val;
68 }
69 }
70 if((pos = strchr(pos, ARG_SEP)) != NULL)
71 pos++;
72 }
73 return 1;
74 }
75 __setup("sim710=", param_setup);
76
77 static struct scsi_host_template sim710_driver_template = {
78 .name = "LSI (Symbios) 710 EISA",
79 .proc_name = "sim710",
80 .this_id = 7,
81 .module = THIS_MODULE,
82 };
83
sim710_probe_common(struct device * dev,unsigned long base_addr,int irq,int clock,int differential,int scsi_id)84 static int sim710_probe_common(struct device *dev, unsigned long base_addr,
85 int irq, int clock, int differential,
86 int scsi_id)
87 {
88 struct Scsi_Host * host = NULL;
89 struct NCR_700_Host_Parameters *hostdata =
90 kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
91
92 printk(KERN_NOTICE "sim710: %s\n", dev_name(dev));
93 printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n",
94 irq, clock, base_addr, scsi_id);
95
96 if(hostdata == NULL) {
97 printk(KERN_ERR "sim710: Failed to allocate host data\n");
98 goto out;
99 }
100
101 if(request_region(base_addr, 64, "sim710") == NULL) {
102 printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n",
103 base_addr);
104 goto out_free;
105 }
106
107 /* Fill in the three required pieces of hostdata */
108 hostdata->base = ioport_map(base_addr, 64);
109 hostdata->differential = differential;
110 hostdata->clock = clock;
111 hostdata->chip710 = 1;
112 hostdata->burst_length = 8;
113
114 /* and register the chip */
115 if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev))
116 == NULL) {
117 printk(KERN_ERR "sim710: No host detected; card configuration problem?\n");
118 goto out_release;
119 }
120 host->this_id = scsi_id;
121 host->base = base_addr;
122 host->irq = irq;
123 if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) {
124 printk(KERN_ERR "sim710: request_irq failed\n");
125 goto out_put_host;
126 }
127
128 dev_set_drvdata(dev, host);
129 scsi_scan_host(host);
130
131 return 0;
132
133 out_put_host:
134 scsi_host_put(host);
135 out_release:
136 ioport_unmap(hostdata->base);
137 release_region(base_addr, 64);
138 out_free:
139 kfree(hostdata);
140 out:
141 return -ENODEV;
142 }
143
sim710_device_remove(struct device * dev)144 static int sim710_device_remove(struct device *dev)
145 {
146 struct Scsi_Host *host = dev_get_drvdata(dev);
147 struct NCR_700_Host_Parameters *hostdata =
148 (struct NCR_700_Host_Parameters *)host->hostdata[0];
149
150 scsi_remove_host(host);
151 NCR_700_release(host);
152 ioport_unmap(hostdata->base);
153 kfree(hostdata);
154 free_irq(host->irq, host);
155 release_region(host->base, 64);
156 return 0;
157 }
158
159 #ifdef CONFIG_EISA
160 static struct eisa_device_id sim710_eisa_ids[] = {
161 { "CPQ4410" },
162 { "CPQ4411" },
163 { "HWP0C80" },
164 { "" }
165 };
166 MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
167
sim710_eisa_probe(struct device * dev)168 static int sim710_eisa_probe(struct device *dev)
169 {
170 struct eisa_device *edev = to_eisa_device(dev);
171 unsigned long io_addr = edev->base_addr;
172 char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
173 char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
174 char *eisa_irqs;
175 unsigned char irq_index;
176 unsigned char irq, differential = 0, scsi_id = 7;
177
178 if(strcmp(edev->id.sig, "HWP0C80") == 0) {
179 __u8 val;
180 eisa_irqs = eisa_hwp_irqs;
181 irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
182
183 val = inb(io_addr + 0x4);
184 scsi_id = ffs(val) - 1;
185
186 if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
187 printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
188 scsi_id = 7;
189 }
190 } else {
191 eisa_irqs = eisa_cpq_irqs;
192 irq_index = inb(io_addr + 0xc88) & 0x07;
193 }
194
195 if(irq_index >= strlen(eisa_irqs)) {
196 printk("sim710.c: irq nasty\n");
197 return -ENODEV;
198 }
199
200 irq = eisa_irqs[irq_index];
201
202 return sim710_probe_common(dev, io_addr, irq, 50,
203 differential, scsi_id);
204 }
205
206 static struct eisa_driver sim710_eisa_driver = {
207 .id_table = sim710_eisa_ids,
208 .driver = {
209 .name = "sim710",
210 .probe = sim710_eisa_probe,
211 .remove = sim710_device_remove,
212 },
213 };
214 #endif /* CONFIG_EISA */
215
sim710_init(void)216 static int __init sim710_init(void)
217 {
218 #ifdef MODULE
219 if (sim710)
220 param_setup(sim710);
221 #endif
222
223 #ifdef CONFIG_EISA
224 /*
225 * FIXME: We'd really like to return -ENODEV if no devices have actually
226 * been found. However eisa_driver_register() only reports problems
227 * with kobject_register() so simply return success for now.
228 */
229 eisa_driver_register(&sim710_eisa_driver);
230 #endif
231 return 0;
232 }
233
sim710_exit(void)234 static void __exit sim710_exit(void)
235 {
236 #ifdef CONFIG_EISA
237 eisa_driver_unregister(&sim710_eisa_driver);
238 #endif
239 }
240
241 module_init(sim710_init);
242 module_exit(sim710_exit);
243