1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Oak Generic NCR5380 driver
4 *
5 * Copyright 1995-2002, Russell King
6 */
7
8 #include <linux/module.h>
9 #include <linux/ioport.h>
10 #include <linux/blkdev.h>
11 #include <linux/init.h>
12
13 #include <asm/ecard.h>
14 #include <asm/io.h>
15
16 #include <scsi/scsi_host.h>
17
18 #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
19
20 #define NCR5380_read(reg) readb(hostdata->io + ((reg) << 2))
21 #define NCR5380_write(reg, value) writeb(value, hostdata->io + ((reg) << 2))
22
23 #define NCR5380_dma_xfer_len NCR5380_dma_xfer_none
24 #define NCR5380_dma_recv_setup oakscsi_pread
25 #define NCR5380_dma_send_setup oakscsi_pwrite
26 #define NCR5380_dma_residual NCR5380_dma_residual_none
27
28 #define NCR5380_queue_command oakscsi_queue_command
29 #define NCR5380_info oakscsi_info
30
31 #define NCR5380_implementation_fields /* none */
32
33 #include "../NCR5380.h"
34
35 #undef START_DMA_INITIATOR_RECEIVE_REG
36 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7)
37
38 #define STAT ((128 + 16) << 2)
39 #define DATA ((128 + 8) << 2)
40
oakscsi_pwrite(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)41 static inline int oakscsi_pwrite(struct NCR5380_hostdata *hostdata,
42 unsigned char *addr, int len)
43 {
44 u8 __iomem *base = hostdata->io;
45
46 printk("writing %p len %d\n",addr, len);
47
48 while(1)
49 {
50 int status;
51 while (((status = readw(base + STAT)) & 0x100)==0);
52 }
53 return 0;
54 }
55
oakscsi_pread(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)56 static inline int oakscsi_pread(struct NCR5380_hostdata *hostdata,
57 unsigned char *addr, int len)
58 {
59 u8 __iomem *base = hostdata->io;
60
61 printk("reading %p len %d\n", addr, len);
62 while(len > 0)
63 {
64 unsigned int status, timeout;
65 unsigned long b;
66
67 timeout = 0x01FFFFFF;
68
69 while (((status = readw(base + STAT)) & 0x100)==0)
70 {
71 timeout--;
72 if(status & 0x200 || !timeout)
73 {
74 printk("status = %08X\n", status);
75 return -1;
76 }
77 }
78
79 if(len >= 128)
80 {
81 readsw(base + DATA, addr, 128);
82 addr += 128;
83 len -= 128;
84 }
85 else
86 {
87 b = (unsigned long) readw(base + DATA);
88 *addr ++ = b;
89 len -= 1;
90 if(len)
91 *addr ++ = b>>8;
92 len -= 1;
93 }
94 }
95 return 0;
96 }
97
98 #undef STAT
99 #undef DATA
100
101 #include "../NCR5380.c"
102
103 static const struct scsi_host_template oakscsi_template = {
104 .module = THIS_MODULE,
105 .name = "Oak 16-bit SCSI",
106 .info = oakscsi_info,
107 .queuecommand = oakscsi_queue_command,
108 .eh_abort_handler = NCR5380_abort,
109 .eh_host_reset_handler = NCR5380_host_reset,
110 .can_queue = 16,
111 .this_id = 7,
112 .sg_tablesize = SG_ALL,
113 .cmd_per_lun = 2,
114 .dma_boundary = PAGE_SIZE - 1,
115 .proc_name = "oakscsi",
116 .cmd_size = sizeof(struct NCR5380_cmd),
117 .max_sectors = 128,
118 };
119
oakscsi_probe(struct expansion_card * ec,const struct ecard_id * id)120 static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
121 {
122 struct Scsi_Host *host;
123 int ret;
124
125 ret = ecard_request_resources(ec);
126 if (ret)
127 goto out;
128
129 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
130 if (!host) {
131 ret = -ENOMEM;
132 goto release;
133 }
134
135 priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
136 ecard_resource_len(ec, ECARD_RES_MEMC));
137 if (!priv(host)->io) {
138 ret = -ENOMEM;
139 goto unreg;
140 }
141
142 host->irq = NO_IRQ;
143
144 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
145 if (ret)
146 goto out_unmap;
147
148 NCR5380_maybe_reset_bus(host);
149
150 ret = scsi_add_host(host, &ec->dev);
151 if (ret)
152 goto out_exit;
153
154 scsi_scan_host(host);
155 goto out;
156
157 out_exit:
158 NCR5380_exit(host);
159 out_unmap:
160 iounmap(priv(host)->io);
161 unreg:
162 scsi_host_put(host);
163 release:
164 ecard_release_resources(ec);
165 out:
166 return ret;
167 }
168
oakscsi_remove(struct expansion_card * ec)169 static void oakscsi_remove(struct expansion_card *ec)
170 {
171 struct Scsi_Host *host = ecard_get_drvdata(ec);
172 void __iomem *base = priv(host)->io;
173
174 ecard_set_drvdata(ec, NULL);
175 scsi_remove_host(host);
176
177 NCR5380_exit(host);
178 scsi_host_put(host);
179 iounmap(base);
180 ecard_release_resources(ec);
181 }
182
183 static const struct ecard_id oakscsi_cids[] = {
184 { MANU_OAK, PROD_OAK_SCSI },
185 { 0xffff, 0xffff }
186 };
187
188 static struct ecard_driver oakscsi_driver = {
189 .probe = oakscsi_probe,
190 .remove = oakscsi_remove,
191 .id_table = oakscsi_cids,
192 .drv = {
193 .name = "oakscsi",
194 },
195 };
196
oakscsi_init(void)197 static int __init oakscsi_init(void)
198 {
199 return ecard_register_driver(&oakscsi_driver);
200 }
201
oakscsi_exit(void)202 static void __exit oakscsi_exit(void)
203 {
204 ecard_remove_driver(&oakscsi_driver);
205 }
206
207 module_init(oakscsi_init);
208 module_exit(oakscsi_exit);
209
210 MODULE_AUTHOR("Russell King");
211 MODULE_DESCRIPTION("Oak SCSI driver");
212 MODULE_LICENSE("GPL");
213
214
