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