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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 |
47 | static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 }; |
48 | |
49 | static char *sim710; /* command line passed by insmod */ |
50 | |
51 | MODULE_AUTHOR("Richard Hirst"); |
52 | MODULE_DESCRIPTION("Simple NCR53C710 driver"); |
53 | MODULE_LICENSE("GPL"); |
54 | |
55 | module_param(sim710, charp, 0); |
56 | |
57 | #ifdef MODULE |
58 | #define ARG_SEP ' ' |
59 | #else |
60 | #define ARG_SEP ',' |
61 | #endif |
62 | |
63 | static __init int |
64 | param_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 | |
90 | static 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 | |
97 | static 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 | |
156 | static 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 |
171 | static struct eisa_device_id sim710_eisa_ids[] = { |
172 | { "CPQ4410" }, |
173 | { "CPQ4411" }, |
174 | { "HWP0C80" }, |
175 | { "" } |
176 | }; |
177 | MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids); |
178 | |
179 | static __init int |
180 | sim710_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 | |
218 | static 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 | |
228 | static 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 | |
248 | static void __exit sim710_exit(void) |
249 | { |
250 | #ifdef CONFIG_EISA |
251 | eisa_driver_unregister(&sim710_eisa_driver); |
252 | #endif |
253 | } |
254 | |
255 | module_init(sim710_init); |
256 | module_exit(sim710_exit); |
257 |
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