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22#include <linux/module.h>
23#include <linux/blkdev.h>
24#include <linux/kernel.h>
25#include <linux/string.h>
26#include <linux/ioport.h>
27#include <linux/proc_fs.h>
28#include <linux/unistd.h>
29#include <linux/stat.h>
30#include <linux/delay.h>
31#include <linux/init.h>
32#include <linux/interrupt.h>
33
34#include <asm/dma.h>
35#include <asm/io.h>
36#include <asm/ecard.h>
37
38#include "../scsi.h"
39#include <scsi/scsi_host.h>
40#include "fas216.h"
41
42struct arxescsi_info {
43 FAS216_Info info;
44 struct expansion_card *ec;
45 void __iomem *base;
46};
47
48#define DMADATA_OFFSET (0x200)
49
50#define DMASTAT_OFFSET (0x600)
51#define DMASTAT_DRQ (1 << 0)
52
53#define CSTATUS_IRQ (1 << 0)
54
55#define VERSION "1.10 (23/01/2003 2.5.57)"
56
57
58
59
60
61
62
63
64
65
66static fasdmatype_t
67arxescsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
68 fasdmadir_t direction, fasdmatype_t min_type)
69{
70
71
72
73 return fasdma_pseudo;
74}
75
76static void arxescsi_pseudo_dma_write(unsigned char *addr, void __iomem *base)
77{
78 __asm__ __volatile__(
79 " stmdb sp!, {r0-r12}\n"
80 " mov r3, %0\n"
81 " mov r1, %1\n"
82 " add r2, r1, #512\n"
83 " mov r4, #256\n"
84 ".loop_1: ldmia r3!, {r6, r8, r10, r12}\n"
85 " mov r5, r6, lsl #16\n"
86 " mov r7, r8, lsl #16\n"
87 ".loop_2: ldrb r0, [r1, #1536]\n"
88 " tst r0, #1\n"
89 " beq .loop_2\n"
90 " stmia r2, {r5-r8}\n\t"
91 " mov r9, r10, lsl #16\n"
92 " mov r11, r12, lsl #16\n"
93 ".loop_3: ldrb r0, [r1, #1536]\n"
94 " tst r0, #1\n"
95 " beq .loop_3\n"
96 " stmia r2, {r9-r12}\n"
97 " subs r4, r4, #16\n"
98 " bne .loop_1\n"
99 " ldmia sp!, {r0-r12}\n"
100 :
101 : "r" (addr), "r" (base));
102}
103
104
105
106
107
108
109
110
111
112static void
113arxescsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
114 fasdmadir_t direction, int transfer)
115{
116 struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;
117 unsigned int length, error = 0;
118 void __iomem *base = info->info.scsi.io_base;
119 unsigned char *addr;
120
121 length = SCp->this_residual;
122 addr = SCp->ptr;
123
124 if (direction == DMA_OUT) {
125 unsigned int word;
126 while (length > 256) {
127 if (readb(base + 0x80) & STAT_INT) {
128 error = 1;
129 break;
130 }
131 arxescsi_pseudo_dma_write(addr, base);
132 addr += 256;
133 length -= 256;
134 }
135
136 if (!error)
137 while (length > 0) {
138 if (readb(base + 0x80) & STAT_INT)
139 break;
140
141 if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
142 continue;
143
144 word = *addr | *(addr + 1) << 8;
145
146 writew(word, base + DMADATA_OFFSET);
147 if (length > 1) {
148 addr += 2;
149 length -= 2;
150 } else {
151 addr += 1;
152 length -= 1;
153 }
154 }
155 }
156 else {
157 if (transfer && (transfer & 255)) {
158 while (length >= 256) {
159 if (readb(base + 0x80) & STAT_INT) {
160 error = 1;
161 break;
162 }
163
164 if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
165 continue;
166
167 readsw(base + DMADATA_OFFSET, addr, 256 >> 1);
168 addr += 256;
169 length -= 256;
170 }
171 }
172
173 if (!(error))
174 while (length > 0) {
175 unsigned long word;
176
177 if (readb(base + 0x80) & STAT_INT)
178 break;
179
180 if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
181 continue;
182
183 word = readw(base + DMADATA_OFFSET);
184 *addr++ = word;
185 if (--length > 0) {
186 *addr++ = word >> 8;
187 length --;
188 }
189 }
190 }
191}
192
193
194
195
196
197
198
199static void arxescsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
200{
201
202
203
204}
205
206
207
208
209
210
211
212static const char *arxescsi_info(struct Scsi_Host *host)
213{
214 struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;
215 static char string[150];
216
217 sprintf(string, "%s (%s) in slot %d v%s",
218 host->hostt->name, info->info.scsi.type, info->ec->slot_no,
219 VERSION);
220
221 return string;
222}
223
224static int
225arxescsi_show_info(struct seq_file *m, struct Scsi_Host *host)
226{
227 struct arxescsi_info *info;
228 info = (struct arxescsi_info *)host->hostdata;
229
230 seq_printf(m, "ARXE 16-bit SCSI driver v%s\n", VERSION);
231 fas216_print_host(&info->info, m);
232 fas216_print_stats(&info->info, m);
233 fas216_print_devices(&info->info, m);
234 return 0;
235}
236
237static struct scsi_host_template arxescsi_template = {
238 .show_info = arxescsi_show_info,
239 .name = "ARXE SCSI card",
240 .info = arxescsi_info,
241 .queuecommand = fas216_noqueue_command,
242 .eh_host_reset_handler = fas216_eh_host_reset,
243 .eh_bus_reset_handler = fas216_eh_bus_reset,
244 .eh_device_reset_handler = fas216_eh_device_reset,
245 .eh_abort_handler = fas216_eh_abort,
246 .cmd_size = sizeof(struct fas216_cmd_priv),
247 .can_queue = 0,
248 .this_id = 7,
249 .sg_tablesize = SG_ALL,
250 .dma_boundary = PAGE_SIZE - 1,
251 .proc_name = "arxescsi",
252};
253
254static int arxescsi_probe(struct expansion_card *ec, const struct ecard_id *id)
255{
256 struct Scsi_Host *host;
257 struct arxescsi_info *info;
258 void __iomem *base;
259 int ret;
260
261 ret = ecard_request_resources(ec);
262 if (ret)
263 goto out;
264
265 base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
266 if (!base) {
267 ret = -ENOMEM;
268 goto out_region;
269 }
270
271 host = scsi_host_alloc(&arxescsi_template, sizeof(struct arxescsi_info));
272 if (!host) {
273 ret = -ENOMEM;
274 goto out_region;
275 }
276
277 info = (struct arxescsi_info *)host->hostdata;
278 info->ec = ec;
279 info->base = base;
280
281 info->info.scsi.io_base = base + 0x2000;
282 info->info.scsi.irq = 0;
283 info->info.scsi.dma = NO_DMA;
284 info->info.scsi.io_shift = 5;
285 info->info.ifcfg.clockrate = 24;
286 info->info.ifcfg.select_timeout = 255;
287 info->info.ifcfg.asyncperiod = 200;
288 info->info.ifcfg.sync_max_depth = 0;
289 info->info.ifcfg.cntl3 = CNTL3_FASTSCSI | CNTL3_FASTCLK;
290 info->info.ifcfg.disconnect_ok = 0;
291 info->info.ifcfg.wide_max_size = 0;
292 info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
293 info->info.dma.setup = arxescsi_dma_setup;
294 info->info.dma.pseudo = arxescsi_dma_pseudo;
295 info->info.dma.stop = arxescsi_dma_stop;
296
297 ec->irqaddr = base;
298 ec->irqmask = CSTATUS_IRQ;
299
300 ret = fas216_init(host);
301 if (ret)
302 goto out_unregister;
303
304 ret = fas216_add(host, &ec->dev);
305 if (ret == 0)
306 goto out;
307
308 fas216_release(host);
309 out_unregister:
310 scsi_host_put(host);
311 out_region:
312 ecard_release_resources(ec);
313 out:
314 return ret;
315}
316
317static void arxescsi_remove(struct expansion_card *ec)
318{
319 struct Scsi_Host *host = ecard_get_drvdata(ec);
320
321 ecard_set_drvdata(ec, NULL);
322 fas216_remove(host);
323
324 fas216_release(host);
325 scsi_host_put(host);
326 ecard_release_resources(ec);
327}
328
329static const struct ecard_id arxescsi_cids[] = {
330 { MANU_ARXE, PROD_ARXE_SCSI },
331 { 0xffff, 0xffff },
332};
333
334static struct ecard_driver arxescsi_driver = {
335 .probe = arxescsi_probe,
336 .remove = arxescsi_remove,
337 .id_table = arxescsi_cids,
338 .drv = {
339 .name = "arxescsi",
340 },
341};
342
343static int __init init_arxe_scsi_driver(void)
344{
345 return ecard_register_driver(&arxescsi_driver);
346}
347
348static void __exit exit_arxe_scsi_driver(void)
349{
350 ecard_remove_driver(&arxescsi_driver);
351}
352
353module_init(init_arxe_scsi_driver);
354module_exit(exit_arxe_scsi_driver);
355
356MODULE_AUTHOR("Stefan Hanske");
357MODULE_DESCRIPTION("ARXESCSI driver for Acorn machines");
358MODULE_LICENSE("GPL");
359
360
