Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/acorn/scsi/powertec.c | |
3 | * | |
4 | * Copyright (C) 1997-2005 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/module.h> | |
11 | #include <linux/blkdev.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/ioport.h> | |
1da177e4 LT |
15 | #include <linux/proc_fs.h> |
16 | #include <linux/delay.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/dma-mapping.h> | |
20 | ||
21 | #include <asm/dma.h> | |
22 | #include <asm/ecard.h> | |
23 | #include <asm/io.h> | |
1da177e4 LT |
24 | #include <asm/pgtable.h> |
25 | ||
26 | #include "../scsi.h" | |
27 | #include <scsi/scsi_host.h> | |
28 | #include "fas216.h" | |
29 | #include "scsi.h" | |
30 | ||
31 | #include <scsi/scsicam.h> | |
32 | ||
33 | #define POWERTEC_FAS216_OFFSET 0x3000 | |
34 | #define POWERTEC_FAS216_SHIFT 6 | |
35 | ||
36 | #define POWERTEC_INTR_STATUS 0x2000 | |
37 | #define POWERTEC_INTR_BIT 0x80 | |
38 | ||
39 | #define POWERTEC_RESET_CONTROL 0x1018 | |
40 | #define POWERTEC_RESET_BIT 1 | |
41 | ||
42 | #define POWERTEC_TERM_CONTROL 0x2018 | |
43 | #define POWERTEC_TERM_ENABLE 1 | |
44 | ||
45 | #define POWERTEC_INTR_CONTROL 0x101c | |
46 | #define POWERTEC_INTR_ENABLE 1 | |
47 | #define POWERTEC_INTR_DISABLE 0 | |
48 | ||
49 | #define VERSION "1.10 (19/01/2003 2.5.59)" | |
50 | ||
51 | /* | |
52 | * Use term=0,1,0,0,0 to turn terminators on/off. | |
53 | * One entry per slot. | |
54 | */ | |
55 | static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; | |
56 | ||
57 | #define NR_SG 256 | |
58 | ||
59 | struct powertec_info { | |
60 | FAS216_Info info; | |
61 | struct expansion_card *ec; | |
62 | void __iomem *base; | |
63 | unsigned int term_ctl; | |
64 | struct scatterlist sg[NR_SG]; | |
65 | }; | |
66 | ||
67 | /* Prototype: void powertecscsi_irqenable(ec, irqnr) | |
68 | * Purpose : Enable interrupts on Powertec SCSI card | |
69 | * Params : ec - expansion card structure | |
70 | * : irqnr - interrupt number | |
71 | */ | |
72 | static void | |
73 | powertecscsi_irqenable(struct expansion_card *ec, int irqnr) | |
74 | { | |
75 | struct powertec_info *info = ec->irq_data; | |
76 | writeb(POWERTEC_INTR_ENABLE, info->base + POWERTEC_INTR_CONTROL); | |
77 | } | |
78 | ||
79 | /* Prototype: void powertecscsi_irqdisable(ec, irqnr) | |
80 | * Purpose : Disable interrupts on Powertec SCSI card | |
81 | * Params : ec - expansion card structure | |
82 | * : irqnr - interrupt number | |
83 | */ | |
84 | static void | |
85 | powertecscsi_irqdisable(struct expansion_card *ec, int irqnr) | |
86 | { | |
87 | struct powertec_info *info = ec->irq_data; | |
88 | writeb(POWERTEC_INTR_DISABLE, info->base + POWERTEC_INTR_CONTROL); | |
89 | } | |
90 | ||
91 | static const expansioncard_ops_t powertecscsi_ops = { | |
92 | .irqenable = powertecscsi_irqenable, | |
93 | .irqdisable = powertecscsi_irqdisable, | |
94 | }; | |
95 | ||
96 | /* Prototype: void powertecscsi_terminator_ctl(host, on_off) | |
97 | * Purpose : Turn the Powertec SCSI terminators on or off | |
98 | * Params : host - card to turn on/off | |
99 | * : on_off - !0 to turn on, 0 to turn off | |
100 | */ | |
101 | static void | |
102 | powertecscsi_terminator_ctl(struct Scsi_Host *host, int on_off) | |
103 | { | |
104 | struct powertec_info *info = (struct powertec_info *)host->hostdata; | |
105 | ||
106 | info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0; | |
107 | writeb(info->term_ctl, info->base + POWERTEC_TERM_CONTROL); | |
108 | } | |
109 | ||
110 | /* Prototype: void powertecscsi_intr(irq, *dev_id, *regs) | |
111 | * Purpose : handle interrupts from Powertec SCSI card | |
112 | * Params : irq - interrupt number | |
113 | * dev_id - user-defined (Scsi_Host structure) | |
1da177e4 | 114 | */ |
7d12e780 | 115 | static irqreturn_t powertecscsi_intr(int irq, void *dev_id) |
1da177e4 LT |
116 | { |
117 | struct powertec_info *info = dev_id; | |
118 | ||
119 | return fas216_intr(&info->info); | |
120 | } | |
121 | ||
122 | /* Prototype: fasdmatype_t powertecscsi_dma_setup(host, SCpnt, direction, min_type) | |
123 | * Purpose : initialises DMA/PIO | |
124 | * Params : host - host | |
125 | * SCpnt - command | |
126 | * direction - DMA on to/off of card | |
127 | * min_type - minimum DMA support that we must have for this transfer | |
128 | * Returns : type of transfer to be performed | |
129 | */ | |
130 | static fasdmatype_t | |
0a04137e | 131 | powertecscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, |
1da177e4 LT |
132 | fasdmadir_t direction, fasdmatype_t min_type) |
133 | { | |
134 | struct powertec_info *info = (struct powertec_info *)host->hostdata; | |
135 | struct device *dev = scsi_get_device(host); | |
136 | int dmach = info->info.scsi.dma; | |
137 | ||
138 | if (info->info.ifcfg.capabilities & FASCAP_DMA && | |
139 | min_type == fasdma_real_all) { | |
140 | int bufs, map_dir, dma_dir; | |
141 | ||
142 | bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG); | |
143 | ||
144 | if (direction == DMA_OUT) | |
145 | map_dir = DMA_TO_DEVICE, | |
146 | dma_dir = DMA_MODE_WRITE; | |
147 | else | |
148 | map_dir = DMA_FROM_DEVICE, | |
149 | dma_dir = DMA_MODE_READ; | |
150 | ||
23d046f4 | 151 | dma_map_sg(dev, info->sg, bufs, map_dir); |
1da177e4 LT |
152 | |
153 | disable_dma(dmach); | |
23d046f4 | 154 | set_dma_sg(dmach, info->sg, bufs); |
1da177e4 LT |
155 | set_dma_mode(dmach, dma_dir); |
156 | enable_dma(dmach); | |
157 | return fasdma_real_all; | |
158 | } | |
159 | ||
160 | /* | |
161 | * If we're not doing DMA, | |
162 | * we'll do slow PIO | |
163 | */ | |
164 | return fasdma_pio; | |
165 | } | |
166 | ||
167 | /* Prototype: int powertecscsi_dma_stop(host, SCpnt) | |
168 | * Purpose : stops DMA/PIO | |
169 | * Params : host - host | |
170 | * SCpnt - command | |
171 | */ | |
172 | static void | |
0a04137e | 173 | powertecscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp) |
1da177e4 LT |
174 | { |
175 | struct powertec_info *info = (struct powertec_info *)host->hostdata; | |
176 | if (info->info.scsi.dma != NO_DMA) | |
177 | disable_dma(info->info.scsi.dma); | |
178 | } | |
179 | ||
180 | /* Prototype: const char *powertecscsi_info(struct Scsi_Host * host) | |
181 | * Purpose : returns a descriptive string about this interface, | |
182 | * Params : host - driver host structure to return info for. | |
183 | * Returns : pointer to a static buffer containing null terminated string. | |
184 | */ | |
185 | const char *powertecscsi_info(struct Scsi_Host *host) | |
186 | { | |
187 | struct powertec_info *info = (struct powertec_info *)host->hostdata; | |
188 | static char string[150]; | |
189 | ||
190 | sprintf(string, "%s (%s) in slot %d v%s terminators o%s", | |
191 | host->hostt->name, info->info.scsi.type, info->ec->slot_no, | |
192 | VERSION, info->term_ctl ? "n" : "ff"); | |
193 | ||
194 | return string; | |
195 | } | |
196 | ||
197 | /* Prototype: int powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) | |
198 | * Purpose : Set a driver specific function | |
199 | * Params : host - host to setup | |
200 | * : buffer - buffer containing string describing operation | |
201 | * : length - length of string | |
202 | * Returns : -EINVAL, or 0 | |
203 | */ | |
204 | static int | |
205 | powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) | |
206 | { | |
207 | int ret = length; | |
208 | ||
209 | if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) { | |
210 | buffer += 12; | |
211 | length -= 12; | |
212 | ||
213 | if (length >= 5 && strncmp(buffer, "term=", 5) == 0) { | |
214 | if (buffer[5] == '1') | |
215 | powertecscsi_terminator_ctl(host, 1); | |
216 | else if (buffer[5] == '0') | |
217 | powertecscsi_terminator_ctl(host, 0); | |
218 | else | |
219 | ret = -EINVAL; | |
220 | } else | |
221 | ret = -EINVAL; | |
222 | } else | |
223 | ret = -EINVAL; | |
224 | ||
225 | return ret; | |
226 | } | |
227 | ||
228 | /* Prototype: int powertecscsi_proc_info(char *buffer, char **start, off_t offset, | |
229 | * int length, int host_no, int inout) | |
230 | * Purpose : Return information about the driver to a user process accessing | |
231 | * the /proc filesystem. | |
232 | * Params : buffer - a buffer to write information to | |
233 | * start - a pointer into this buffer set by this routine to the start | |
234 | * of the required information. | |
25985edc | 235 | * offset - offset into information that we have read up to. |
1da177e4 LT |
236 | * length - length of buffer |
237 | * inout - 0 for reading, 1 for writing. | |
238 | * Returns : length of data written to buffer. | |
239 | */ | |
240 | int powertecscsi_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, | |
241 | int length, int inout) | |
242 | { | |
243 | struct powertec_info *info; | |
244 | char *p = buffer; | |
245 | int pos; | |
246 | ||
247 | if (inout == 1) | |
248 | return powertecscsi_set_proc_info(host, buffer, length); | |
249 | ||
250 | info = (struct powertec_info *)host->hostdata; | |
251 | ||
252 | p += sprintf(p, "PowerTec SCSI driver v%s\n", VERSION); | |
253 | p += fas216_print_host(&info->info, p); | |
254 | p += sprintf(p, "Term : o%s\n", | |
255 | info->term_ctl ? "n" : "ff"); | |
256 | ||
257 | p += fas216_print_stats(&info->info, p); | |
258 | p += fas216_print_devices(&info->info, p); | |
259 | ||
260 | *start = buffer + offset; | |
261 | pos = p - buffer - offset; | |
262 | if (pos > length) | |
263 | pos = length; | |
264 | ||
265 | return pos; | |
266 | } | |
267 | ||
10523b3b | 268 | static ssize_t powertecscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
269 | { |
270 | struct expansion_card *ec = ECARD_DEV(dev); | |
271 | struct Scsi_Host *host = ecard_get_drvdata(ec); | |
272 | struct powertec_info *info = (struct powertec_info *)host->hostdata; | |
273 | ||
274 | return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0); | |
275 | } | |
276 | ||
277 | static ssize_t | |
10523b3b | 278 | powertecscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) |
1da177e4 LT |
279 | { |
280 | struct expansion_card *ec = ECARD_DEV(dev); | |
281 | struct Scsi_Host *host = ecard_get_drvdata(ec); | |
282 | ||
283 | if (len > 1) | |
284 | powertecscsi_terminator_ctl(host, buf[0] != '0'); | |
285 | ||
286 | return len; | |
287 | } | |
288 | ||
289 | static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR, | |
290 | powertecscsi_show_term, powertecscsi_store_term); | |
291 | ||
d0be4a7d | 292 | static struct scsi_host_template powertecscsi_template = { |
1da177e4 LT |
293 | .module = THIS_MODULE, |
294 | .proc_info = powertecscsi_proc_info, | |
295 | .name = "PowerTec SCSI", | |
296 | .info = powertecscsi_info, | |
297 | .queuecommand = fas216_queue_command, | |
298 | .eh_host_reset_handler = fas216_eh_host_reset, | |
299 | .eh_bus_reset_handler = fas216_eh_bus_reset, | |
300 | .eh_device_reset_handler = fas216_eh_device_reset, | |
301 | .eh_abort_handler = fas216_eh_abort, | |
302 | ||
303 | .can_queue = 8, | |
304 | .this_id = 7, | |
5369bea7 RK |
305 | .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, |
306 | .dma_boundary = IOMD_DMA_BOUNDARY, | |
1da177e4 LT |
307 | .cmd_per_lun = 2, |
308 | .use_clustering = ENABLE_CLUSTERING, | |
309 | .proc_name = "powertec", | |
310 | }; | |
311 | ||
312 | static int __devinit | |
313 | powertecscsi_probe(struct expansion_card *ec, const struct ecard_id *id) | |
314 | { | |
315 | struct Scsi_Host *host; | |
316 | struct powertec_info *info; | |
1da177e4 LT |
317 | void __iomem *base; |
318 | int ret; | |
319 | ||
320 | ret = ecard_request_resources(ec); | |
321 | if (ret) | |
322 | goto out; | |
323 | ||
10bdaaa0 | 324 | base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); |
1da177e4 LT |
325 | if (!base) { |
326 | ret = -ENOMEM; | |
327 | goto out_region; | |
328 | } | |
329 | ||
330 | host = scsi_host_alloc(&powertecscsi_template, | |
331 | sizeof (struct powertec_info)); | |
332 | if (!host) { | |
333 | ret = -ENOMEM; | |
10bdaaa0 | 334 | goto out_region; |
1da177e4 LT |
335 | } |
336 | ||
337 | ecard_set_drvdata(ec, host); | |
338 | ||
339 | info = (struct powertec_info *)host->hostdata; | |
340 | info->base = base; | |
341 | powertecscsi_terminator_ctl(host, term[ec->slot_no]); | |
342 | ||
23d046f4 | 343 | info->ec = ec; |
1da177e4 LT |
344 | info->info.scsi.io_base = base + POWERTEC_FAS216_OFFSET; |
345 | info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT; | |
346 | info->info.scsi.irq = ec->irq; | |
347 | info->info.scsi.dma = ec->dma; | |
348 | info->info.ifcfg.clockrate = 40; /* MHz */ | |
349 | info->info.ifcfg.select_timeout = 255; | |
350 | info->info.ifcfg.asyncperiod = 200; /* ns */ | |
351 | info->info.ifcfg.sync_max_depth = 7; | |
352 | info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK; | |
353 | info->info.ifcfg.disconnect_ok = 1; | |
354 | info->info.ifcfg.wide_max_size = 0; | |
355 | info->info.ifcfg.capabilities = 0; | |
356 | info->info.dma.setup = powertecscsi_dma_setup; | |
357 | info->info.dma.pseudo = NULL; | |
358 | info->info.dma.stop = powertecscsi_dma_stop; | |
359 | ||
360 | ec->irqaddr = base + POWERTEC_INTR_STATUS; | |
361 | ec->irqmask = POWERTEC_INTR_BIT; | |
c7b87f3d RK |
362 | |
363 | ecard_setirq(ec, &powertecscsi_ops, info); | |
1da177e4 LT |
364 | |
365 | device_create_file(&ec->dev, &dev_attr_bus_term); | |
366 | ||
367 | ret = fas216_init(host); | |
368 | if (ret) | |
369 | goto out_free; | |
370 | ||
371 | ret = request_irq(ec->irq, powertecscsi_intr, | |
1d6f359a | 372 | IRQF_DISABLED, "powertec", info); |
1da177e4 LT |
373 | if (ret) { |
374 | printk("scsi%d: IRQ%d not free: %d\n", | |
375 | host->host_no, ec->irq, ret); | |
376 | goto out_release; | |
377 | } | |
378 | ||
379 | if (info->info.scsi.dma != NO_DMA) { | |
380 | if (request_dma(info->info.scsi.dma, "powertec")) { | |
381 | printk("scsi%d: DMA%d not free, using PIO\n", | |
382 | host->host_no, info->info.scsi.dma); | |
383 | info->info.scsi.dma = NO_DMA; | |
384 | } else { | |
385 | set_dma_speed(info->info.scsi.dma, 180); | |
386 | info->info.ifcfg.capabilities |= FASCAP_DMA; | |
387 | } | |
388 | } | |
389 | ||
390 | ret = fas216_add(host, &ec->dev); | |
391 | if (ret == 0) | |
392 | goto out; | |
393 | ||
394 | if (info->info.scsi.dma != NO_DMA) | |
395 | free_dma(info->info.scsi.dma); | |
396 | free_irq(ec->irq, host); | |
397 | ||
398 | out_release: | |
399 | fas216_release(host); | |
400 | ||
401 | out_free: | |
402 | device_remove_file(&ec->dev, &dev_attr_bus_term); | |
403 | scsi_host_put(host); | |
404 | ||
1da177e4 LT |
405 | out_region: |
406 | ecard_release_resources(ec); | |
407 | ||
408 | out: | |
409 | return ret; | |
410 | } | |
411 | ||
412 | static void __devexit powertecscsi_remove(struct expansion_card *ec) | |
413 | { | |
414 | struct Scsi_Host *host = ecard_get_drvdata(ec); | |
415 | struct powertec_info *info = (struct powertec_info *)host->hostdata; | |
416 | ||
417 | ecard_set_drvdata(ec, NULL); | |
418 | fas216_remove(host); | |
419 | ||
420 | device_remove_file(&ec->dev, &dev_attr_bus_term); | |
421 | ||
422 | if (info->info.scsi.dma != NO_DMA) | |
423 | free_dma(info->info.scsi.dma); | |
424 | free_irq(ec->irq, info); | |
425 | ||
1da177e4 LT |
426 | fas216_release(host); |
427 | scsi_host_put(host); | |
428 | ecard_release_resources(ec); | |
429 | } | |
430 | ||
431 | static const struct ecard_id powertecscsi_cids[] = { | |
432 | { MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI }, | |
433 | { 0xffff, 0xffff }, | |
434 | }; | |
435 | ||
436 | static struct ecard_driver powertecscsi_driver = { | |
437 | .probe = powertecscsi_probe, | |
438 | .remove = __devexit_p(powertecscsi_remove), | |
439 | .id_table = powertecscsi_cids, | |
440 | .drv = { | |
441 | .name = "powertecscsi", | |
442 | }, | |
443 | }; | |
444 | ||
445 | static int __init powertecscsi_init(void) | |
446 | { | |
447 | return ecard_register_driver(&powertecscsi_driver); | |
448 | } | |
449 | ||
450 | static void __exit powertecscsi_exit(void) | |
451 | { | |
452 | ecard_remove_driver(&powertecscsi_driver); | |
453 | } | |
454 | ||
455 | module_init(powertecscsi_init); | |
456 | module_exit(powertecscsi_exit); | |
457 | ||
458 | MODULE_AUTHOR("Russell King"); | |
459 | MODULE_DESCRIPTION("Powertec SCSI driver"); | |
8d3b33f6 | 460 | module_param_array(term, int, NULL, 0); |
1da177e4 LT |
461 | MODULE_PARM_DESC(term, "SCSI bus termination"); |
462 | MODULE_LICENSE("GPL"); |