1 /*
2 * Generic Generic NCR5380 driver
3 *
4 * Copyright 1995-2002, Russell King
5 */
6 #include <linux/module.h>
7 #include <linux/ioport.h>
8 #include <linux/blkdev.h>
9 #include <linux/init.h>
10
11 #include <asm/ecard.h>
12 #include <asm/io.h>
13
14 #include <scsi/scsi_host.h>
15
16 #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
17 #define NCR5380_read(reg) cumanascsi_read(hostdata, reg)
18 #define NCR5380_write(reg, value) cumanascsi_write(hostdata, reg, value)
19
20 #define NCR5380_dma_xfer_len cumanascsi_dma_xfer_len
21 #define NCR5380_dma_recv_setup cumanascsi_pread
22 #define NCR5380_dma_send_setup cumanascsi_pwrite
23 #define NCR5380_dma_residual NCR5380_dma_residual_none
24
25 #define NCR5380_intr cumanascsi_intr
26 #define NCR5380_queue_command cumanascsi_queue_command
27 #define NCR5380_info cumanascsi_info
28
29 #define NCR5380_implementation_fields \
30 unsigned ctrl
31
32 struct NCR5380_hostdata;
33 static u8 cumanascsi_read(struct NCR5380_hostdata *, unsigned int);
34 static void cumanascsi_write(struct NCR5380_hostdata *, unsigned int, u8);
35
36 #include "../NCR5380.h"
37
38 #define CTRL 0x16fc
39 #define STAT 0x2004
40 #define L(v) (((v)<<16)|((v) & 0x0000ffff))
41 #define H(v) (((v)>>16)|((v) & 0xffff0000))
42
cumanascsi_pwrite(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)43 static inline int cumanascsi_pwrite(struct NCR5380_hostdata *hostdata,
44 unsigned char *addr, int len)
45 {
46 unsigned long *laddr;
47 u8 __iomem *base = hostdata->io;
48 u8 __iomem *dma = hostdata->pdma_io + 0x2000;
49
50 if(!len) return 0;
51
52 writeb(0x02, base + CTRL);
53 laddr = (unsigned long *)addr;
54 while(len >= 32)
55 {
56 unsigned int status;
57 unsigned long v;
58 status = readb(base + STAT);
59 if(status & 0x80)
60 goto end;
61 if(!(status & 0x40))
62 continue;
63 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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 len -= 32;
72 if(len == 0)
73 break;
74 }
75
76 addr = (unsigned char *)laddr;
77 writeb(0x12, base + CTRL);
78
79 while(len > 0)
80 {
81 unsigned int status;
82 status = readb(base + STAT);
83 if(status & 0x80)
84 goto end;
85 if(status & 0x40)
86 {
87 writeb(*addr++, dma);
88 if(--len == 0)
89 break;
90 }
91
92 status = readb(base + STAT);
93 if(status & 0x80)
94 goto end;
95 if(status & 0x40)
96 {
97 writeb(*addr++, dma);
98 if(--len == 0)
99 break;
100 }
101 }
102 end:
103 writeb(hostdata->ctrl | 0x40, base + CTRL);
104
105 if (len)
106 return -1;
107 return 0;
108 }
109
cumanascsi_pread(struct NCR5380_hostdata * hostdata,unsigned char * addr,int len)110 static inline int cumanascsi_pread(struct NCR5380_hostdata *hostdata,
111 unsigned char *addr, int len)
112 {
113 unsigned long *laddr;
114 u8 __iomem *base = hostdata->io;
115 u8 __iomem *dma = hostdata->pdma_io + 0x2000;
116
117 if(!len) return 0;
118
119 writeb(0x00, base + CTRL);
120 laddr = (unsigned long *)addr;
121 while(len >= 32)
122 {
123 unsigned int status;
124 status = readb(base + STAT);
125 if(status & 0x80)
126 goto end;
127 if(!(status & 0x40))
128 continue;
129 *laddr++ = readw(dma) | (readw(dma) << 16);
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 len -= 32;
138 if(len == 0)
139 break;
140 }
141
142 addr = (unsigned char *)laddr;
143 writeb(0x10, base + CTRL);
144
145 while(len > 0)
146 {
147 unsigned int status;
148 status = readb(base + STAT);
149 if(status & 0x80)
150 goto end;
151 if(status & 0x40)
152 {
153 *addr++ = readb(dma);
154 if(--len == 0)
155 break;
156 }
157
158 status = readb(base + STAT);
159 if(status & 0x80)
160 goto end;
161 if(status & 0x40)
162 {
163 *addr++ = readb(dma);
164 if(--len == 0)
165 break;
166 }
167 }
168 end:
169 writeb(hostdata->ctrl | 0x40, base + CTRL);
170
171 if (len)
172 return -1;
173 return 0;
174 }
175
cumanascsi_dma_xfer_len(struct NCR5380_hostdata * hostdata,struct scsi_cmnd * cmd)176 static int cumanascsi_dma_xfer_len(struct NCR5380_hostdata *hostdata,
177 struct scsi_cmnd *cmd)
178 {
179 return cmd->transfersize;
180 }
181
cumanascsi_read(struct NCR5380_hostdata * hostdata,unsigned int reg)182 static u8 cumanascsi_read(struct NCR5380_hostdata *hostdata,
183 unsigned int reg)
184 {
185 u8 __iomem *base = hostdata->io;
186 u8 val;
187
188 writeb(0, base + CTRL);
189
190 val = readb(base + 0x2100 + (reg << 2));
191
192 hostdata->ctrl = 0x40;
193 writeb(0x40, base + CTRL);
194
195 return val;
196 }
197
cumanascsi_write(struct NCR5380_hostdata * hostdata,unsigned int reg,u8 value)198 static void cumanascsi_write(struct NCR5380_hostdata *hostdata,
199 unsigned int reg, u8 value)
200 {
201 u8 __iomem *base = hostdata->io;
202
203 writeb(0, base + CTRL);
204
205 writeb(value, base + 0x2100 + (reg << 2));
206
207 hostdata->ctrl = 0x40;
208 writeb(0x40, base + CTRL);
209 }
210
211 #include "../NCR5380.c"
212
213 static struct scsi_host_template cumanascsi_template = {
214 .module = THIS_MODULE,
215 .name = "Cumana 16-bit SCSI",
216 .info = cumanascsi_info,
217 .queuecommand = cumanascsi_queue_command,
218 .eh_abort_handler = NCR5380_abort,
219 .eh_host_reset_handler = NCR5380_host_reset,
220 .can_queue = 16,
221 .this_id = 7,
222 .sg_tablesize = SG_ALL,
223 .cmd_per_lun = 2,
224 .use_clustering = DISABLE_CLUSTERING,
225 .proc_name = "CumanaSCSI-1",
226 .cmd_size = NCR5380_CMD_SIZE,
227 .max_sectors = 128,
228 };
229
cumanascsi1_probe(struct expansion_card * ec,const struct ecard_id * id)230 static int cumanascsi1_probe(struct expansion_card *ec,
231 const struct ecard_id *id)
232 {
233 struct Scsi_Host *host;
234 int ret;
235
236 ret = ecard_request_resources(ec);
237 if (ret)
238 goto out;
239
240 host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
241 if (!host) {
242 ret = -ENOMEM;
243 goto out_release;
244 }
245
246 priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
247 ecard_resource_len(ec, ECARD_RES_IOCSLOW));
248 priv(host)->pdma_io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
249 ecard_resource_len(ec, ECARD_RES_MEMC));
250 if (!priv(host)->io || !priv(host)->pdma_io) {
251 ret = -ENOMEM;
252 goto out_unmap;
253 }
254
255 host->irq = ec->irq;
256
257 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
258 if (ret)
259 goto out_unmap;
260
261 NCR5380_maybe_reset_bus(host);
262
263 priv(host)->ctrl = 0;
264 writeb(0, priv(host)->io + CTRL);
265
266 ret = request_irq(host->irq, cumanascsi_intr, 0,
267 "CumanaSCSI-1", host);
268 if (ret) {
269 printk("scsi%d: IRQ%d not free: %d\n",
270 host->host_no, host->irq, ret);
271 goto out_exit;
272 }
273
274 ret = scsi_add_host(host, &ec->dev);
275 if (ret)
276 goto out_free_irq;
277
278 scsi_scan_host(host);
279 goto out;
280
281 out_free_irq:
282 free_irq(host->irq, host);
283 out_exit:
284 NCR5380_exit(host);
285 out_unmap:
286 iounmap(priv(host)->io);
287 iounmap(priv(host)->pdma_io);
288 scsi_host_put(host);
289 out_release:
290 ecard_release_resources(ec);
291 out:
292 return ret;
293 }
294
cumanascsi1_remove(struct expansion_card * ec)295 static void cumanascsi1_remove(struct expansion_card *ec)
296 {
297 struct Scsi_Host *host = ecard_get_drvdata(ec);
298 void __iomem *base = priv(host)->io;
299 void __iomem *dma = priv(host)->pdma_io;
300
301 ecard_set_drvdata(ec, NULL);
302
303 scsi_remove_host(host);
304 free_irq(host->irq, host);
305 NCR5380_exit(host);
306 scsi_host_put(host);
307 iounmap(base);
308 iounmap(dma);
309 ecard_release_resources(ec);
310 }
311
312 static const struct ecard_id cumanascsi1_cids[] = {
313 { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
314 { 0xffff, 0xffff }
315 };
316
317 static struct ecard_driver cumanascsi1_driver = {
318 .probe = cumanascsi1_probe,
319 .remove = cumanascsi1_remove,
320 .id_table = cumanascsi1_cids,
321 .drv = {
322 .name = "cumanascsi1",
323 },
324 };
325
cumanascsi_init(void)326 static int __init cumanascsi_init(void)
327 {
328 return ecard_register_driver(&cumanascsi1_driver);
329 }
330
cumanascsi_exit(void)331 static void __exit cumanascsi_exit(void)
332 {
333 ecard_remove_driver(&cumanascsi1_driver);
334 }
335
336 module_init(cumanascsi_init);
337 module_exit(cumanascsi_exit);
338
339 MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
340 MODULE_LICENSE("GPL");
341
