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1da177e4 LT |
1 | /* -*- mode: c; c-basic-offset: 8 -*- */ |
2 | ||
3 | /* NCR Dual 700 MCA SCSI Driver | |
4 | * | |
5 | * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com | |
6 | **----------------------------------------------------------------------------- | |
7 | ** | |
8 | ** This program is free software; you can redistribute it and/or modify | |
9 | ** it under the terms of the GNU General Public License as published by | |
10 | ** the Free Software Foundation; either version 2 of the License, or | |
11 | ** (at your option) any later version. | |
12 | ** | |
13 | ** This program is distributed in the hope that it will be useful, | |
14 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ** GNU General Public License for more details. | |
17 | ** | |
18 | ** You should have received a copy of the GNU General Public License | |
19 | ** along with this program; if not, write to the Free Software | |
20 | ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | ** | |
22 | **----------------------------------------------------------------------------- | |
23 | */ | |
24 | ||
25 | /* Notes: | |
26 | * | |
27 | * Most of the work is done in the chip specific module, 53c700.o | |
28 | * | |
29 | * TODO List: | |
30 | * | |
31 | * 1. Extract the SCSI ID from the voyager CMOS table (necessary to | |
32 | * support multi-host environments. | |
33 | * | |
34 | * */ | |
35 | ||
36 | ||
37 | /* CHANGELOG | |
38 | * | |
39 | * Version 2.2 | |
40 | * | |
41 | * Added mca_set_adapter_name(). | |
42 | * | |
43 | * Version 2.1 | |
44 | * | |
45 | * Modularise the driver into a Board piece (this file) and a chip | |
46 | * piece 53c700.[ch] and 53c700.scr, added module options. You can | |
47 | * now specify the scsi id by the parameters | |
48 | * | |
49 | * NCR_D700=slot:<n> [siop:<n>] id:<n> .... | |
50 | * | |
51 | * They need to be comma separated if compiled into the kernel | |
52 | * | |
53 | * Version 2.0 | |
54 | * | |
55 | * Initial implementation of TCQ (Tag Command Queueing). TCQ is full | |
56 | * featured and uses the clock algorithm to keep track of outstanding | |
57 | * tags and guard against individual tag starvation. Also fixed a bug | |
58 | * in all of the 1.x versions where the D700_data_residue() function | |
59 | * was returning results off by 32 bytes (and thus causing the same 32 | |
60 | * bytes to be written twice corrupting the data block). It turns out | |
61 | * the 53c700 only has a 6 bit DBC and DFIFO registers not 7 bit ones | |
62 | * like the 53c710 (The 710 is the only data manual still available, | |
63 | * which I'd been using to program the 700). | |
64 | * | |
65 | * Version 1.2 | |
66 | * | |
67 | * Much improved message handling engine | |
68 | * | |
69 | * Version 1.1 | |
70 | * | |
71 | * Add code to handle selection reasonably correctly. By the time we | |
72 | * get the selection interrupt, we've already responded, but drop off the | |
73 | * bus and hope the selector will go away. | |
74 | * | |
75 | * Version 1.0: | |
76 | * | |
77 | * Initial release. Fully functional except for procfs and tag | |
78 | * command queueing. Has only been tested on cards with 53c700-66 | |
79 | * chips and only single ended. Features are | |
80 | * | |
81 | * 1. Synchronous data transfers to offset 8 (limit of 700-66) and | |
82 | * 100ns (10MHz) limit of SCSI-2 | |
83 | * | |
84 | * 2. Disconnection and reselection | |
85 | * | |
86 | * Testing: | |
87 | * | |
88 | * I've only really tested this with the 700-66 chip, but have done | |
89 | * soak tests in multi-device environments to verify that | |
90 | * disconnections and reselections are being processed correctly. | |
91 | * */ | |
92 | ||
93 | #define NCR_D700_VERSION "2.2" | |
94 | ||
95 | #include <linux/blkdev.h> | |
96 | #include <linux/interrupt.h> | |
97 | #include <linux/kernel.h> | |
98 | #include <linux/module.h> | |
99 | #include <linux/mca.h> | |
1da177e4 LT |
100 | #include <asm/io.h> |
101 | #include <scsi/scsi_host.h> | |
102 | #include <scsi/scsi_device.h> | |
103 | #include <scsi/scsi_transport.h> | |
104 | #include <scsi/scsi_transport_spi.h> | |
105 | ||
106 | #include "53c700.h" | |
107 | #include "NCR_D700.h" | |
108 | ||
109 | static char *NCR_D700; /* command line from insmod */ | |
110 | ||
111 | MODULE_AUTHOR("James Bottomley"); | |
112 | MODULE_DESCRIPTION("NCR Dual700 SCSI Driver"); | |
113 | MODULE_LICENSE("GPL"); | |
114 | module_param(NCR_D700, charp, 0); | |
115 | ||
3bb056eb | 116 | static __u8 __devinitdata id_array[2*(MCA_MAX_SLOT_NR + 1)] = |
1da177e4 LT |
117 | { [0 ... 2*(MCA_MAX_SLOT_NR + 1)-1] = 7 }; |
118 | ||
119 | #ifdef MODULE | |
120 | #define ARG_SEP ' ' | |
121 | #else | |
122 | #define ARG_SEP ',' | |
123 | #endif | |
124 | ||
125 | static int __init | |
126 | param_setup(char *string) | |
127 | { | |
128 | char *pos = string, *next; | |
129 | int slot = -1, siop = -1; | |
130 | ||
131 | while(pos != NULL && (next = strchr(pos, ':')) != NULL) { | |
132 | int val = (int)simple_strtoul(++next, NULL, 0); | |
133 | ||
134 | if(!strncmp(pos, "slot:", 5)) | |
135 | slot = val; | |
136 | else if(!strncmp(pos, "siop:", 5)) | |
137 | siop = val; | |
138 | else if(!strncmp(pos, "id:", 3)) { | |
139 | if(slot == -1) { | |
140 | printk(KERN_WARNING "NCR D700: Must specify slot for id parameter\n"); | |
141 | } else if(slot > MCA_MAX_SLOT_NR) { | |
142 | printk(KERN_WARNING "NCR D700: Illegal slot %d for id %d\n", slot, val); | |
143 | } else { | |
144 | if(siop != 0 && siop != 1) { | |
145 | id_array[slot*2] = val; | |
146 | id_array[slot*2 + 1] =val; | |
147 | } else { | |
148 | id_array[slot*2 + siop] = val; | |
149 | } | |
150 | } | |
151 | } | |
152 | if((pos = strchr(pos, ARG_SEP)) != NULL) | |
153 | pos++; | |
154 | } | |
155 | return 1; | |
156 | } | |
157 | ||
158 | /* Host template. The 53c700 routine NCR_700_detect will | |
159 | * fill in all of the missing routines */ | |
160 | static struct scsi_host_template NCR_D700_driver_template = { | |
161 | .module = THIS_MODULE, | |
162 | .name = "NCR Dual 700 MCA", | |
163 | .proc_name = "NCR_D700", | |
164 | .this_id = 7, | |
165 | }; | |
166 | ||
167 | /* We needs this helper because we have two hosts per struct device */ | |
168 | struct NCR_D700_private { | |
169 | struct device *dev; | |
170 | struct Scsi_Host *hosts[2]; | |
171 | char name[30]; | |
172 | char pad; | |
173 | }; | |
174 | ||
3bb056eb | 175 | static int __devinit |
1da177e4 LT |
176 | NCR_D700_probe_one(struct NCR_D700_private *p, int siop, int irq, |
177 | int slot, u32 region, int differential) | |
178 | { | |
179 | struct NCR_700_Host_Parameters *hostdata; | |
180 | struct Scsi_Host *host; | |
181 | int ret; | |
182 | ||
dd00cc48 | 183 | hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL); |
1da177e4 LT |
184 | if (!hostdata) { |
185 | printk(KERN_ERR "NCR D700: SIOP%d: Failed to allocate host" | |
186 | "data, detatching\n", siop); | |
187 | return -ENOMEM; | |
188 | } | |
1da177e4 LT |
189 | |
190 | if (!request_region(region, 64, "NCR_D700")) { | |
191 | printk(KERN_ERR "NCR D700: Failed to reserve IO region 0x%x\n", | |
192 | region); | |
193 | ret = -ENODEV; | |
194 | goto region_failed; | |
195 | } | |
196 | ||
197 | /* Fill in the three required pieces of hostdata */ | |
56fece20 | 198 | hostdata->base = ioport_map(region, 64); |
1da177e4 LT |
199 | hostdata->differential = (((1<<siop) & differential) != 0); |
200 | hostdata->clock = NCR_D700_CLOCK_MHZ; | |
a5364c5a | 201 | hostdata->burst_length = 8; |
1da177e4 | 202 | |
1da177e4 LT |
203 | /* and register the siop */ |
204 | host = NCR_700_detect(&NCR_D700_driver_template, hostdata, p->dev); | |
205 | if (!host) { | |
206 | ret = -ENOMEM; | |
207 | goto detect_failed; | |
208 | } | |
209 | ||
210 | p->hosts[siop] = host; | |
211 | /* FIXME: read this from SUS */ | |
212 | host->this_id = id_array[slot * 2 + siop]; | |
213 | host->irq = irq; | |
56fece20 | 214 | host->base = region; |
1da177e4 LT |
215 | scsi_scan_host(host); |
216 | ||
217 | return 0; | |
218 | ||
219 | detect_failed: | |
8800727a | 220 | release_region(region, 64); |
1da177e4 LT |
221 | region_failed: |
222 | kfree(hostdata); | |
223 | ||
224 | return ret; | |
225 | } | |
226 | ||
227 | static int | |
7d12e780 | 228 | NCR_D700_intr(int irq, void *data) |
1da177e4 LT |
229 | { |
230 | struct NCR_D700_private *p = (struct NCR_D700_private *)data; | |
231 | int i, found = 0; | |
232 | ||
233 | for (i = 0; i < 2; i++) | |
234 | if (p->hosts[i] && | |
7d12e780 | 235 | NCR_700_intr(irq, p->hosts[i]) == IRQ_HANDLED) |
1da177e4 LT |
236 | found++; |
237 | ||
238 | return found ? IRQ_HANDLED : IRQ_NONE; | |
239 | } | |
240 | ||
241 | /* Detect a D700 card. Note, because of the setup --- the chips are | |
242 | * essentially connectecd to the MCA bus independently, it is easier | |
243 | * to set them up as two separate host adapters, rather than one | |
244 | * adapter with two channels */ | |
3bb056eb | 245 | static int __devinit |
1da177e4 LT |
246 | NCR_D700_probe(struct device *dev) |
247 | { | |
248 | struct NCR_D700_private *p; | |
249 | int differential; | |
250 | static int banner = 1; | |
251 | struct mca_device *mca_dev = to_mca_device(dev); | |
252 | int slot = mca_dev->slot; | |
253 | int found = 0; | |
254 | int irq, i; | |
255 | int pos3j, pos3k, pos3a, pos3b, pos4; | |
256 | __u32 base_addr, offset_addr; | |
257 | ||
258 | /* enable board interrupt */ | |
259 | pos4 = mca_device_read_pos(mca_dev, 4); | |
260 | pos4 |= 0x4; | |
261 | mca_device_write_pos(mca_dev, 4, pos4); | |
262 | ||
263 | mca_device_write_pos(mca_dev, 6, 9); | |
264 | pos3j = mca_device_read_pos(mca_dev, 3); | |
265 | mca_device_write_pos(mca_dev, 6, 10); | |
266 | pos3k = mca_device_read_pos(mca_dev, 3); | |
267 | mca_device_write_pos(mca_dev, 6, 0); | |
268 | pos3a = mca_device_read_pos(mca_dev, 3); | |
269 | mca_device_write_pos(mca_dev, 6, 1); | |
270 | pos3b = mca_device_read_pos(mca_dev, 3); | |
271 | ||
272 | base_addr = ((pos3j << 8) | pos3k) & 0xfffffff0; | |
273 | offset_addr = ((pos3a << 8) | pos3b) & 0xffffff70; | |
274 | ||
275 | irq = (pos4 & 0x3) + 11; | |
276 | if(irq >= 13) | |
277 | irq++; | |
278 | if(banner) { | |
279 | printk(KERN_NOTICE "NCR D700: Driver Version " NCR_D700_VERSION "\n" | |
280 | "NCR D700: Copyright (c) 2001 by James.Bottomley@HansenPartnership.com\n" | |
281 | "NCR D700:\n"); | |
282 | banner = 0; | |
283 | } | |
284 | /* now do the bus related transforms */ | |
285 | irq = mca_device_transform_irq(mca_dev, irq); | |
286 | base_addr = mca_device_transform_ioport(mca_dev, base_addr); | |
287 | offset_addr = mca_device_transform_ioport(mca_dev, offset_addr); | |
288 | ||
289 | printk(KERN_NOTICE "NCR D700: found in slot %d irq = %d I/O base = 0x%x\n", slot, irq, offset_addr); | |
290 | ||
291 | /*outb(BOARD_RESET, base_addr);*/ | |
292 | ||
293 | /* clear any pending interrupts */ | |
294 | (void)inb(base_addr + 0x08); | |
295 | /* get modctl, used later for setting diff bits */ | |
296 | switch(differential = (inb(base_addr + 0x08) >> 6)) { | |
297 | case 0x00: | |
298 | /* only SIOP1 differential */ | |
299 | differential = 0x02; | |
300 | break; | |
301 | case 0x01: | |
302 | /* Both SIOPs differential */ | |
303 | differential = 0x03; | |
304 | break; | |
305 | case 0x03: | |
306 | /* No SIOPs differential */ | |
307 | differential = 0x00; | |
308 | break; | |
309 | default: | |
310 | printk(KERN_ERR "D700: UNEXPECTED DIFFERENTIAL RESULT 0x%02x\n", | |
311 | differential); | |
312 | differential = 0x00; | |
313 | break; | |
314 | } | |
315 | ||
bbfbbbc1 | 316 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
1da177e4 LT |
317 | if (!p) |
318 | return -ENOMEM; | |
bbfbbbc1 | 319 | |
1da177e4 | 320 | p->dev = dev; |
71610f55 | 321 | snprintf(p->name, sizeof(p->name), "D700(%s)", dev_name(dev)); |
1d6f359a | 322 | if (request_irq(irq, NCR_D700_intr, IRQF_SHARED, p->name, p)) { |
1da177e4 LT |
323 | printk(KERN_ERR "D700: request_irq failed\n"); |
324 | kfree(p); | |
325 | return -EBUSY; | |
326 | } | |
327 | /* plumb in both 700 chips */ | |
328 | for (i = 0; i < 2; i++) { | |
329 | int err; | |
330 | ||
3bb056eb | 331 | if ((err = NCR_D700_probe_one(p, i, irq, slot, |
1da177e4 LT |
332 | offset_addr + (0x80 * i), |
333 | differential)) != 0) | |
334 | printk("D700: SIOP%d: probe failed, error = %d\n", | |
335 | i, err); | |
336 | else | |
337 | found++; | |
338 | } | |
339 | ||
340 | if (!found) { | |
341 | kfree(p); | |
342 | return -ENODEV; | |
343 | } | |
344 | ||
345 | mca_device_set_claim(mca_dev, 1); | |
346 | mca_device_set_name(mca_dev, "NCR_D700"); | |
347 | dev_set_drvdata(dev, p); | |
348 | return 0; | |
349 | } | |
350 | ||
3bb056eb | 351 | static void __devexit |
1da177e4 LT |
352 | NCR_D700_remove_one(struct Scsi_Host *host) |
353 | { | |
354 | scsi_remove_host(host); | |
355 | NCR_700_release(host); | |
356 | kfree((struct NCR_700_Host_Parameters *)host->hostdata[0]); | |
357 | free_irq(host->irq, host); | |
358 | release_region(host->base, 64); | |
359 | } | |
360 | ||
3bb056eb | 361 | static int __devexit |
1da177e4 LT |
362 | NCR_D700_remove(struct device *dev) |
363 | { | |
364 | struct NCR_D700_private *p = dev_get_drvdata(dev); | |
365 | int i; | |
366 | ||
367 | for (i = 0; i < 2; i++) | |
368 | NCR_D700_remove_one(p->hosts[i]); | |
369 | ||
370 | kfree(p); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static short NCR_D700_id_table[] = { NCR_D700_MCA_ID, 0 }; | |
375 | ||
376 | static struct mca_driver NCR_D700_driver = { | |
377 | .id_table = NCR_D700_id_table, | |
378 | .driver = { | |
379 | .name = "NCR_D700", | |
380 | .bus = &mca_bus_type, | |
381 | .probe = NCR_D700_probe, | |
3bb056eb | 382 | .remove = __devexit_p(NCR_D700_remove), |
1da177e4 LT |
383 | }, |
384 | }; | |
385 | ||
386 | static int __init NCR_D700_init(void) | |
387 | { | |
388 | #ifdef MODULE | |
389 | if (NCR_D700) | |
390 | param_setup(NCR_D700); | |
391 | #endif | |
392 | ||
393 | return mca_register_driver(&NCR_D700_driver); | |
394 | } | |
395 | ||
396 | static void __exit NCR_D700_exit(void) | |
397 | { | |
398 | mca_unregister_driver(&NCR_D700_driver); | |
399 | } | |
400 | ||
401 | module_init(NCR_D700_init); | |
402 | module_exit(NCR_D700_exit); | |
403 | ||
404 | __setup("NCR_D700=", param_setup); |