1 /*
2 * Oak Generic NCR5380 driver
3 *
4 * Copyright 1995-2002, Russell King
5 */
6
7 #include <linux/module.h>
8 #include <linux/signal.h>
9 #include <linux/ioport.h>
10 #include <linux/delay.h>
11 #include <linux/blkdev.h>
12 #include <linux/init.h>
13
14 #include <asm/ecard.h>
15 #include <asm/io.h>
16 #include <asm/system.h>
17
18 #include "../scsi.h"
19 #include <scsi/scsi_host.h>
20
21 #define AUTOSENSE
22 /*#define PSEUDO_DMA*/
23
24 #define OAKSCSI_PUBLIC_RELEASE 1
25
26 #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
27 #define NCR5380_local_declare() void __iomem *_base
28 #define NCR5380_setup(host) _base = priv(host)->base
29
30 #define NCR5380_read(reg) readb(_base + ((reg) << 2))
31 #define NCR5380_write(reg, value) writeb(value, _base + ((reg) << 2))
32 #define NCR5380_intr oakscsi_intr
33 #define NCR5380_queue_command oakscsi_queue_command
34 #define NCR5380_proc_info oakscsi_proc_info
35
36 #define NCR5380_implementation_fields \
37 void __iomem *base
38
39 #define BOARD_NORMAL 0
40 #define BOARD_NCR53C400 1
41
42 #include "../NCR5380.h"
43
44 #undef START_DMA_INITIATOR_RECEIVE_REG
45 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7)
46
47 const char * oakscsi_info (struct Scsi_Host *spnt)
48 {
49 return "";
50 }
51
52 #define STAT ((128 + 16) << 2)
53 #define DATA ((128 + 8) << 2)
54
55 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr,
56 int len)
57 {
58 void __iomem *base = priv(instance)->base;
59
60 printk("writing %p len %d\n",addr, len);
61 if(!len) return -1;
62
63 while(1)
64 {
65 int status;
66 while (((status = readw(base + STAT)) & 0x100)==0);
67 }
68 }
69
70 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr,
71 int len)
72 {
73 void __iomem *base = priv(instance)->base;
74 printk("reading %p len %d\n", addr, len);
75 while(len > 0)
76 {
77 unsigned int status, timeout;
78 unsigned long b;
79
80 timeout = 0x01FFFFFF;
81
82 while (((status = readw(base + STAT)) & 0x100)==0)
83 {
84 timeout--;
85 if(status & 0x200 || !timeout)
86 {
87 printk("status = %08X\n", status);
88 return 1;
89 }
90 }
91
92 if(len >= 128)
93 {
94 readsw(base + DATA, addr, 128);
95 addr += 128;
96 len -= 128;
97 }
98 else
99 {
100 b = (unsigned long) readw(base + DATA);
101 *addr ++ = b;
102 len -= 1;
103 if(len)
104 *addr ++ = b>>8;
105 len -= 1;
106 }
107 }
108 return 0;
109 }
110
111 #undef STAT
112 #undef DATA
113
114 #include "../NCR5380.c"
115
116 static struct scsi_host_template oakscsi_template = {
117 .module = THIS_MODULE,
118 .proc_info = oakscsi_proc_info,
119 .name = "Oak 16-bit SCSI",
120 .info = oakscsi_info,
121 .queuecommand = oakscsi_queue_command,
122 .eh_abort_handler = NCR5380_abort,
123 .eh_bus_reset_handler = NCR5380_bus_reset,
124 .can_queue = 16,
125 .this_id = 7,
126 .sg_tablesize = SG_ALL,
127 .cmd_per_lun = 2,
128 .use_clustering = DISABLE_CLUSTERING,
129 .proc_name = "oakscsi",
130 };
131
132 static int __devinit
133 oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
134 {
135 struct Scsi_Host *host;
136 int ret = -ENOMEM;
137
138 ret = ecard_request_resources(ec);
139 if (ret)
140 goto out;
141
142 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
143 if (!host) {
144 ret = -ENOMEM;
145 goto release;
146 }
147
148 priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
149 ecard_resource_len(ec, ECARD_RES_MEMC));
150 if (!priv(host)->base) {
151 ret = -ENOMEM;
152 goto unreg;
153 }
154
155 host->irq = IRQ_NONE;
156 host->n_io_port = 255;
157
158 NCR5380_init(host, 0);
159
160 printk("scsi%d: at port 0x%08lx irqs disabled",
161 host->host_no, host->io_port);
162 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
163 host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE);
164 printk("\nscsi%d:", host->host_no);
165 NCR5380_print_options(host);
166 printk("\n");
167
168 ret = scsi_add_host(host, &ec->dev);
169 if (ret)
170 goto out_unmap;
171
172 scsi_scan_host(host);
173 goto out;
174
175 out_unmap:
176 iounmap(priv(host)->base);
177 unreg:
178 scsi_host_put(host);
179 release:
180 ecard_release_resources(ec);
181 out:
182 return ret;
183 }
184
185 static void __devexit oakscsi_remove(struct expansion_card *ec)
186 {
187 struct Scsi_Host *host = ecard_get_drvdata(ec);
188
189 ecard_set_drvdata(ec, NULL);
190 scsi_remove_host(host);
191
192 NCR5380_exit(host);
193 iounmap(priv(host)->base);
194 scsi_host_put(host);
195 ecard_release_resources(ec);
196 }
197
198 static const struct ecard_id oakscsi_cids[] = {
199 { MANU_OAK, PROD_OAK_SCSI },
200 { 0xffff, 0xffff }
201 };
202
203 static struct ecard_driver oakscsi_driver = {
204 .probe = oakscsi_probe,
205 .remove = __devexit_p(oakscsi_remove),
206 .id_table = oakscsi_cids,
207 .drv = {
208 .name = "oakscsi",
209 },
210 };
211
212 static int __init oakscsi_init(void)
213 {
214 return ecard_register_driver(&oakscsi_driver);
215 }
216
217 static void __exit oakscsi_exit(void)
218 {
219 ecard_remove_driver(&oakscsi_driver);
220 }
221
222 module_init(oakscsi_init);
223 module_exit(oakscsi_exit);
224
225 MODULE_AUTHOR("Russell King");
226 MODULE_DESCRIPTION("Oak SCSI driver");
227 MODULE_LICENSE("GPL");
228
229
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