1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Generic Generic NCR5380 driver
4 *
5 * Copyright 1995-2002, Russell King
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 #define NCR5380_read(reg) cumanascsi_read(hostdata, reg)
19 #define NCR5380_write(reg, value) cumanascsi_write(hostdata, reg, value)
20
21 #define NCR5380_dma_xfer_len cumanascsi_dma_xfer_len
22 #define NCR5380_dma_recv_setup cumanascsi_pread
23 #define NCR5380_dma_send_setup cumanascsi_pwrite
24 #define NCR5380_dma_residual NCR5380_dma_residual_none
25
26 #define NCR5380_intr cumanascsi_intr
27 #define NCR5380_queue_command cumanascsi_queue_command
28 #define NCR5380_info cumanascsi_info
29
30 #define NCR5380_implementation_fields \
31 unsigned ctrl
32
33 struct NCR5380_hostdata;
34 static u8 cumanascsi_read(struct NCR5380_hostdata *, unsigned int);
35 static void cumanascsi_write(struct NCR5380_hostdata *, unsigned int, u8);
36
37 #include "../NCR5380.h"
38
39 #define CTRL 0x16fc
40 #define STAT 0x2004
41 #define L(v) (((v)<<16)|((v) & 0x0000ffff))
42 #define H(v) (((v)>>16)|((v) & 0xffff0000))
43
cumanascsi_pwrite(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)44 static inline int cumanascsi_pwrite(struct NCR5380_hostdata *hostdata,
45 unsigned char *addr, int len)
46 {
47 unsigned long *laddr;
48 u8 __iomem *base = hostdata->io;
49 u8 __iomem *dma = hostdata->pdma_io + 0x2000;
50
51 if(!len) return 0;
52
53 writeb(0x02, base + CTRL);
54 laddr = (unsigned long *)addr;
55 while(len >= 32)
56 {
57 unsigned int status;
58 unsigned long v;
59 status = readb(base + STAT);
60 if(status & 0x80)
61 goto end;
62 if(!(status & 0x40))
63 continue;
64 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
65 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
66 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
67 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
68 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
69 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
70 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
71 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
72 len -= 32;
73 if(len == 0)
74 break;
75 }
76
77 addr = (unsigned char *)laddr;
78 writeb(0x12, base + CTRL);
79
80 while(len > 0)
81 {
82 unsigned int status;
83 status = readb(base + STAT);
84 if(status & 0x80)
85 goto end;
86 if(status & 0x40)
87 {
88 writeb(*addr++, dma);
89 if(--len == 0)
90 break;
91 }
92
93 status = readb(base + STAT);
94 if(status & 0x80)
95 goto end;
96 if(status & 0x40)
97 {
98 writeb(*addr++, dma);
99 if(--len == 0)
100 break;
101 }
102 }
103 end:
104 writeb(hostdata->ctrl | 0x40, base + CTRL);
105
106 if (len)
107 return -1;
108 return 0;
109 }
110
cumanascsi_pread(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)111 static inline int cumanascsi_pread(struct NCR5380_hostdata *hostdata,
112 unsigned char *addr, int len)
113 {
114 unsigned long *laddr;
115 u8 __iomem *base = hostdata->io;
116 u8 __iomem *dma = hostdata->pdma_io + 0x2000;
117
118 if(!len) return 0;
119
120 writeb(0x00, base + CTRL);
121 laddr = (unsigned long *)addr;
122 while(len >= 32)
123 {
124 unsigned int status;
125 status = readb(base + STAT);
126 if(status & 0x80)
127 goto end;
128 if(!(status & 0x40))
129 continue;
130 *laddr++ = readw(dma) | (readw(dma) << 16);
131 *laddr++ = readw(dma) | (readw(dma) << 16);
132 *laddr++ = readw(dma) | (readw(dma) << 16);
133 *laddr++ = readw(dma) | (readw(dma) << 16);
134 *laddr++ = readw(dma) | (readw(dma) << 16);
135 *laddr++ = readw(dma) | (readw(dma) << 16);
136 *laddr++ = readw(dma) | (readw(dma) << 16);
137 *laddr++ = readw(dma) | (readw(dma) << 16);
138 len -= 32;
139 if(len == 0)
140 break;
141 }
142
143 addr = (unsigned char *)laddr;
144 writeb(0x10, base + CTRL);
145
146 while(len > 0)
147 {
148 unsigned int status;
149 status = readb(base + STAT);
150 if(status & 0x80)
151 goto end;
152 if(status & 0x40)
153 {
154 *addr++ = readb(dma);
155 if(--len == 0)
156 break;
157 }
158
159 status = readb(base + STAT);
160 if(status & 0x80)
161 goto end;
162 if(status & 0x40)
163 {
164 *addr++ = readb(dma);
165 if(--len == 0)
166 break;
167 }
168 }
169 end:
170 writeb(hostdata->ctrl | 0x40, base + CTRL);
171
172 if (len)
173 return -1;
174 return 0;
175 }
176
cumanascsi_dma_xfer_len(struct NCR5380_hostdata * hostdata,struct scsi_cmnd * cmd)177 static int cumanascsi_dma_xfer_len(struct NCR5380_hostdata *hostdata,
178 struct scsi_cmnd *cmd)
179 {
180 return cmd->transfersize;
181 }
182
cumanascsi_read(struct NCR5380_hostdata * hostdata,unsigned int reg)183 static u8 cumanascsi_read(struct NCR5380_hostdata *hostdata,
184 unsigned int reg)
185 {
186 u8 __iomem *base = hostdata->io;
187 u8 val;
188
189 writeb(0, base + CTRL);
190
191 val = readb(base + 0x2100 + (reg << 2));
192
193 hostdata->ctrl = 0x40;
194 writeb(0x40, base + CTRL);
195
196 return val;
197 }
198
cumanascsi_write(struct NCR5380_hostdata * hostdata,unsigned int reg,u8 value)199 static void cumanascsi_write(struct NCR5380_hostdata *hostdata,
200 unsigned int reg, u8 value)
201 {
202 u8 __iomem *base = hostdata->io;
203
204 writeb(0, base + CTRL);
205
206 writeb(value, base + 0x2100 + (reg << 2));
207
208 hostdata->ctrl = 0x40;
209 writeb(0x40, base + CTRL);
210 }
211
212 #include "../NCR5380.c"
213
214 static const struct scsi_host_template cumanascsi_template = {
215 .module = THIS_MODULE,
216 .name = "Cumana 16-bit SCSI",
217 .info = cumanascsi_info,
218 .queuecommand = cumanascsi_queue_command,
219 .eh_abort_handler = NCR5380_abort,
220 .eh_host_reset_handler = NCR5380_host_reset,
221 .can_queue = 16,
222 .this_id = 7,
223 .sg_tablesize = SG_ALL,
224 .cmd_per_lun = 2,
225 .proc_name = "CumanaSCSI-1",
226 .cmd_size = sizeof(struct NCR5380_cmd),
227 .max_sectors = 128,
228 .dma_boundary = PAGE_SIZE - 1,
229 };
230
cumanascsi1_probe(struct expansion_card * ec,const struct ecard_id * id)231 static int cumanascsi1_probe(struct expansion_card *ec,
232 const struct ecard_id *id)
233 {
234 struct Scsi_Host *host;
235 int ret;
236
237 ret = ecard_request_resources(ec);
238 if (ret)
239 goto out;
240
241 host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
242 if (!host) {
243 ret = -ENOMEM;
244 goto out_release;
245 }
246
247 priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
248 ecard_resource_len(ec, ECARD_RES_IOCSLOW));
249 priv(host)->pdma_io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
250 ecard_resource_len(ec, ECARD_RES_MEMC));
251 if (!priv(host)->io || !priv(host)->pdma_io) {
252 ret = -ENOMEM;
253 goto out_unmap;
254 }
255
256 host->irq = ec->irq;
257
258 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
259 if (ret)
260 goto out_unmap;
261
262 NCR5380_maybe_reset_bus(host);
263
264 priv(host)->ctrl = 0;
265 writeb(0, priv(host)->io + CTRL);
266
267 ret = request_irq(host->irq, cumanascsi_intr, 0,
268 "CumanaSCSI-1", host);
269 if (ret) {
270 printk("scsi%d: IRQ%d not free: %d\n",
271 host->host_no, host->irq, ret);
272 goto out_exit;
273 }
274
275 ret = scsi_add_host(host, &ec->dev);
276 if (ret)
277 goto out_free_irq;
278
279 scsi_scan_host(host);
280 goto out;
281
282 out_free_irq:
283 free_irq(host->irq, host);
284 out_exit:
285 NCR5380_exit(host);
286 out_unmap:
287 iounmap(priv(host)->io);
288 iounmap(priv(host)->pdma_io);
289 scsi_host_put(host);
290 out_release:
291 ecard_release_resources(ec);
292 out:
293 return ret;
294 }
295
cumanascsi1_remove(struct expansion_card * ec)296 static void cumanascsi1_remove(struct expansion_card *ec)
297 {
298 struct Scsi_Host *host = ecard_get_drvdata(ec);
299 void __iomem *base = priv(host)->io;
300 void __iomem *dma = priv(host)->pdma_io;
301
302 ecard_set_drvdata(ec, NULL);
303
304 scsi_remove_host(host);
305 free_irq(host->irq, host);
306 NCR5380_exit(host);
307 scsi_host_put(host);
308 iounmap(base);
309 iounmap(dma);
310 ecard_release_resources(ec);
311 }
312
313 static const struct ecard_id cumanascsi1_cids[] = {
314 { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
315 { 0xffff, 0xffff }
316 };
317
318 static struct ecard_driver cumanascsi1_driver = {
319 .probe = cumanascsi1_probe,
320 .remove = cumanascsi1_remove,
321 .id_table = cumanascsi1_cids,
322 .drv = {
323 .name = "cumanascsi1",
324 },
325 };
326
cumanascsi_init(void)327 static int __init cumanascsi_init(void)
328 {
329 return ecard_register_driver(&cumanascsi1_driver);
330 }
331
cumanascsi_exit(void)332 static void __exit cumanascsi_exit(void)
333 {
334 ecard_remove_driver(&cumanascsi1_driver);
335 }
336
337 module_init(cumanascsi_init);
338 module_exit(cumanascsi_exit);
339
340 MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
341 MODULE_LICENSE("GPL");
342