1
2
3
4
5
6
7#include <linux/module.h>
8#include <linux/ioport.h>
9#include <linux/blkdev.h>
10#include <linux/init.h>
11
12#include <asm/ecard.h>
13#include <asm/io.h>
14
15#include <scsi/scsi_host.h>
16
17#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
18
19#define NCR5380_read(reg) \
20 readb(priv(instance)->base + ((reg) << 2))
21#define NCR5380_write(reg, value) \
22 writeb(value, priv(instance)->base + ((reg) << 2))
23
24#define NCR5380_dma_xfer_len(instance, cmd, phase) (0)
25#define NCR5380_dma_recv_setup oakscsi_pread
26#define NCR5380_dma_send_setup oakscsi_pwrite
27#define NCR5380_dma_residual(instance) (0)
28
29#define NCR5380_queue_command oakscsi_queue_command
30#define NCR5380_info oakscsi_info
31
32#define NCR5380_implementation_fields \
33 void __iomem *base
34
35#include "../NCR5380.h"
36
37#undef START_DMA_INITIATOR_RECEIVE_REG
38#define START_DMA_INITIATOR_RECEIVE_REG (128 + 7)
39
40#define STAT ((128 + 16) << 2)
41#define DATA ((128 + 8) << 2)
42
43static inline int oakscsi_pwrite(struct Scsi_Host *instance,
44 unsigned char *addr, int len)
45{
46 void __iomem *base = priv(instance)->base;
47
48printk("writing %p len %d\n",addr, len);
49
50 while(1)
51 {
52 int status;
53 while (((status = readw(base + STAT)) & 0x100)==0);
54 }
55 return 0;
56}
57
58static inline int oakscsi_pread(struct Scsi_Host *instance,
59 unsigned char *addr, int len)
60{
61 void __iomem *base = priv(instance)->base;
62printk("reading %p len %d\n", addr, len);
63 while(len > 0)
64 {
65 unsigned int status, timeout;
66 unsigned long b;
67
68 timeout = 0x01FFFFFF;
69
70 while (((status = readw(base + STAT)) & 0x100)==0)
71 {
72 timeout--;
73 if(status & 0x200 || !timeout)
74 {
75 printk("status = %08X\n", status);
76 return -1;
77 }
78 }
79
80 if(len >= 128)
81 {
82 readsw(base + DATA, addr, 128);
83 addr += 128;
84 len -= 128;
85 }
86 else
87 {
88 b = (unsigned long) readw(base + DATA);
89 *addr ++ = b;
90 len -= 1;
91 if(len)
92 *addr ++ = b>>8;
93 len -= 1;
94 }
95 }
96 return 0;
97}
98
99#undef STAT
100#undef DATA
101
102#include "../NCR5380.c"
103
104static struct scsi_host_template oakscsi_template = {
105 .module = THIS_MODULE,
106 .name = "Oak 16-bit SCSI",
107 .info = oakscsi_info,
108 .queuecommand = oakscsi_queue_command,
109 .eh_abort_handler = NCR5380_abort,
110 .eh_bus_reset_handler = NCR5380_bus_reset,
111 .can_queue = 16,
112 .this_id = 7,
113 .sg_tablesize = SG_ALL,
114 .cmd_per_lun = 2,
115 .use_clustering = DISABLE_CLUSTERING,
116 .proc_name = "oakscsi",
117 .cmd_size = NCR5380_CMD_SIZE,
118 .max_sectors = 128,
119};
120
121static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
122{
123 struct Scsi_Host *host;
124 int ret = -ENOMEM;
125
126 ret = ecard_request_resources(ec);
127 if (ret)
128 goto out;
129
130 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
131 if (!host) {
132 ret = -ENOMEM;
133 goto release;
134 }
135
136 priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
137 ecard_resource_len(ec, ECARD_RES_MEMC));
138 if (!priv(host)->base) {
139 ret = -ENOMEM;
140 goto unreg;
141 }
142
143 host->irq = NO_IRQ;
144 host->n_io_port = 255;
145
146 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
147 if (ret)
148 goto out_unmap;
149
150 NCR5380_maybe_reset_bus(host);
151
152 ret = scsi_add_host(host, &ec->dev);
153 if (ret)
154 goto out_exit;
155
156 scsi_scan_host(host);
157 goto out;
158
159 out_exit:
160 NCR5380_exit(host);
161 out_unmap:
162 iounmap(priv(host)->base);
163 unreg:
164 scsi_host_put(host);
165 release:
166 ecard_release_resources(ec);
167 out:
168 return ret;
169}
170
171static void oakscsi_remove(struct expansion_card *ec)
172{
173 struct Scsi_Host *host = ecard_get_drvdata(ec);
174
175 ecard_set_drvdata(ec, NULL);
176 scsi_remove_host(host);
177
178 NCR5380_exit(host);
179 iounmap(priv(host)->base);
180 scsi_host_put(host);
181 ecard_release_resources(ec);
182}
183
184static const struct ecard_id oakscsi_cids[] = {
185 { MANU_OAK, PROD_OAK_SCSI },
186 { 0xffff, 0xffff }
187};
188
189static struct ecard_driver oakscsi_driver = {
190 .probe = oakscsi_probe,
191 .remove = oakscsi_remove,
192 .id_table = oakscsi_cids,
193 .drv = {
194 .name = "oakscsi",
195 },
196};
197
198static int __init oakscsi_init(void)
199{
200 return ecard_register_driver(&oakscsi_driver);
201}
202
203static void __exit oakscsi_exit(void)
204{
205 ecard_remove_driver(&oakscsi_driver);
206}
207
208module_init(oakscsi_init);
209module_exit(oakscsi_exit);
210
211MODULE_AUTHOR("Russell King");
212MODULE_DESCRIPTION("Oak SCSI driver");
213MODULE_LICENSE("GPL");
214
215
