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 | |
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(addr: base + STAT)) & 0x100)==0); |
52 | } |
53 | return 0; |
54 | } |
55 | |
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(addr: 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(addr: base + DATA, buffer: addr, count: 128); |
82 | addr += 128; |
83 | len -= 128; |
84 | } |
85 | else |
86 | { |
87 | b = (unsigned long) readw(addr: 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 | |
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(offset: ecard_resource_start(ec, ECARD_RES_MEMC), |
136 | size: 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(instance: host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP); |
145 | if (ret) |
146 | goto out_unmap; |
147 | |
148 | NCR5380_maybe_reset_bus(instance: host); |
149 | |
150 | ret = scsi_add_host(host, dev: &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(instance: host); |
159 | out_unmap: |
160 | iounmap(priv(host)->io); |
161 | unreg: |
162 | scsi_host_put(t: host); |
163 | release: |
164 | ecard_release_resources(ec); |
165 | out: |
166 | return ret; |
167 | } |
168 | |
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(instance: host); |
178 | scsi_host_put(t: host); |
179 | iounmap(addr: 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 | |
197 | static int __init oakscsi_init(void) |
198 | { |
199 | return ecard_register_driver(&oakscsi_driver); |
200 | } |
201 | |
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 | |