1 /*
2 * Oak Generic NCR5380 driver
3 *
4 * Copyright 1995-2002, Russell King
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) readb(hostdata->io + ((reg) << 2))
20 #define NCR5380_write(reg, value) writeb(value, hostdata->io + ((reg) << 2))
21
22 #define NCR5380_dma_xfer_len NCR5380_dma_xfer_none
23 #define NCR5380_dma_recv_setup oakscsi_pread
24 #define NCR5380_dma_send_setup oakscsi_pwrite
25 #define NCR5380_dma_residual NCR5380_dma_residual_none
26
27 #define NCR5380_queue_command oakscsi_queue_command
28 #define NCR5380_info oakscsi_info
29
30 #define NCR5380_implementation_fields /* none */
31
32 #include "../NCR5380.h"
33
34 #undef START_DMA_INITIATOR_RECEIVE_REG
35 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7)
36
37 #define STAT ((128 + 16) << 2)
38 #define DATA ((128 + 8) << 2)
39
oakscsi_pwrite(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)40 static inline int oakscsi_pwrite(struct NCR5380_hostdata *hostdata,
41 unsigned char *addr, int len)
42 {
43 u8 __iomem *base = hostdata->io;
44
45 printk("writing %p len %d\n",addr, len);
46
47 while(1)
48 {
49 int status;
50 while (((status = readw(base + STAT)) & 0x100)==0);
51 }
52 return 0;
53 }
54
oakscsi_pread(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)55 static inline int oakscsi_pread(struct NCR5380_hostdata *hostdata,
56 unsigned char *addr, int len)
57 {
58 u8 __iomem *base = hostdata->io;
59
60 printk("reading %p len %d\n", addr, len);
61 while(len > 0)
62 {
63 unsigned int status, timeout;
64 unsigned long b;
65
66 timeout = 0x01FFFFFF;
67
68 while (((status = readw(base + STAT)) & 0x100)==0)
69 {
70 timeout--;
71 if(status & 0x200 || !timeout)
72 {
73 printk("status = %08X\n", status);
74 return -1;
75 }
76 }
77
78 if(len >= 128)
79 {
80 readsw(base + DATA, addr, 128);
81 addr += 128;
82 len -= 128;
83 }
84 else
85 {
86 b = (unsigned long) readw(base + DATA);
87 *addr ++ = b;
88 len -= 1;
89 if(len)
90 *addr ++ = b>>8;
91 len -= 1;
92 }
93 }
94 return 0;
95 }
96
97 #undef STAT
98 #undef DATA
99
100 #include "../NCR5380.c"
101
102 static struct scsi_host_template oakscsi_template = {
103 .module = THIS_MODULE,
104 .name = "Oak 16-bit SCSI",
105 .info = oakscsi_info,
106 .queuecommand = oakscsi_queue_command,
107 .eh_abort_handler = NCR5380_abort,
108 .eh_host_reset_handler = NCR5380_host_reset,
109 .can_queue = 16,
110 .this_id = 7,
111 .sg_tablesize = SG_ALL,
112 .cmd_per_lun = 2,
113 .use_clustering = DISABLE_CLUSTERING,
114 .proc_name = "oakscsi",
115 .cmd_size = NCR5380_CMD_SIZE,
116 .max_sectors = 128,
117 };
118
oakscsi_probe(struct expansion_card * ec,const struct ecard_id * id)119 static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
120 {
121 struct Scsi_Host *host;
122 int ret = -ENOMEM;
123
124 ret = ecard_request_resources(ec);
125 if (ret)
126 goto out;
127
128 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
129 if (!host) {
130 ret = -ENOMEM;
131 goto release;
132 }
133
134 priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
135 ecard_resource_len(ec, ECARD_RES_MEMC));
136 if (!priv(host)->io) {
137 ret = -ENOMEM;
138 goto unreg;
139 }
140
141 host->irq = NO_IRQ;
142
143 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
144 if (ret)
145 goto out_unmap;
146
147 NCR5380_maybe_reset_bus(host);
148
149 ret = scsi_add_host(host, &ec->dev);
150 if (ret)
151 goto out_exit;
152
153 scsi_scan_host(host);
154 goto out;
155
156 out_exit:
157 NCR5380_exit(host);
158 out_unmap:
159 iounmap(priv(host)->io);
160 unreg:
161 scsi_host_put(host);
162 release:
163 ecard_release_resources(ec);
164 out:
165 return ret;
166 }
167
oakscsi_remove(struct expansion_card * ec)168 static void oakscsi_remove(struct expansion_card *ec)
169 {
170 struct Scsi_Host *host = ecard_get_drvdata(ec);
171 void __iomem *base = priv(host)->io;
172
173 ecard_set_drvdata(ec, NULL);
174 scsi_remove_host(host);
175
176 NCR5380_exit(host);
177 scsi_host_put(host);
178 iounmap(base);
179 ecard_release_resources(ec);
180 }
181
182 static const struct ecard_id oakscsi_cids[] = {
183 { MANU_OAK, PROD_OAK_SCSI },
184 { 0xffff, 0xffff }
185 };
186
187 static struct ecard_driver oakscsi_driver = {
188 .probe = oakscsi_probe,
189 .remove = oakscsi_remove,
190 .id_table = oakscsi_cids,
191 .drv = {
192 .name = "oakscsi",
193 },
194 };
195
oakscsi_init(void)196 static int __init oakscsi_init(void)
197 {
198 return ecard_register_driver(&oakscsi_driver);
199 }
200
oakscsi_exit(void)201 static void __exit oakscsi_exit(void)
202 {
203 ecard_remove_driver(&oakscsi_driver);
204 }
205
206 module_init(oakscsi_init);
207 module_exit(oakscsi_exit);
208
209 MODULE_AUTHOR("Russell King");
210 MODULE_DESCRIPTION("Oak SCSI driver");
211 MODULE_LICENSE("GPL");
212
213
