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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / scsi / aic7xxx / aic7770.c
blob92703bb35982224cc48252edf1969db29b4d79cd
1 /*
2 * Product specific probe and attach routines for:
3 * 27/284X and aic7770 motherboard SCSI controllers
4 *
5 * Copyright (c) 1994-1998, 2000, 2001 Justin T. Gibbs.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification.
14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
15 * substantially similar to the "NO WARRANTY" disclaimer below
16 * ("Disclaimer") and any redistribution must be conditioned upon
17 * including a substantially similar Disclaimer requirement for further
18 * binary redistribution.
19 * 3. Neither the names of the above-listed copyright holders nor the names
20 * of any contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * Alternatively, this software may be distributed under the terms of the
24 * GNU General Public License ("GPL") version 2 as published by the Free
25 * Software Foundation.
26 *
27 * NO WARRANTY
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
37 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGES.
39 *
40 * $Id: //depot/aic7xxx/aic7xxx/aic7770.c#32 $
41 *
42 * $FreeBSD$
43 */
44
45 #ifdef __linux__
46 #include "aic7xxx_osm.h"
47 #include "aic7xxx_inline.h"
48 #include "aic7xxx_93cx6.h"
49 #else
50 #include <dev/aic7xxx/aic7xxx_osm.h>
51 #include <dev/aic7xxx/aic7xxx_inline.h>
52 #include <dev/aic7xxx/aic7xxx_93cx6.h>
53 #endif
54
55 #define ID_AIC7770 0x04907770
56 #define ID_AHA_274x 0x04907771
57 #define ID_AHA_284xB 0x04907756 /* BIOS enabled */
58 #define ID_AHA_284x 0x04907757 /* BIOS disabled*/
59 #define ID_OLV_274x 0x04907782 /* Olivetti OEM */
60 #define ID_OLV_274xD 0x04907783 /* Olivetti OEM (Differential) */
61
62 static int aic7770_chip_init(struct ahc_softc *ahc);
63 static int aic7770_suspend(struct ahc_softc *ahc);
64 static int aic7770_resume(struct ahc_softc *ahc);
65 static int aha2840_load_seeprom(struct ahc_softc *ahc);
66 static ahc_device_setup_t ahc_aic7770_VL_setup;
67 static ahc_device_setup_t ahc_aic7770_EISA_setup;
68 static ahc_device_setup_t ahc_aic7770_setup;
69
70 struct aic7770_identity aic7770_ident_table[] =
71 {
72 {
73 ID_AHA_274x,
74 0xFFFFFFFF,
75 "Adaptec 274X SCSI adapter",
76 ahc_aic7770_EISA_setup
77 },
78 {
79 ID_AHA_284xB,
80 0xFFFFFFFE,
81 "Adaptec 284X SCSI adapter",
82 ahc_aic7770_VL_setup
83 },
84 {
85 ID_AHA_284x,
86 0xFFFFFFFE,
87 "Adaptec 284X SCSI adapter (BIOS Disabled)",
88 ahc_aic7770_VL_setup
89 },
90 {
91 ID_OLV_274x,
92 0xFFFFFFFF,
93 "Adaptec (Olivetti OEM) 274X SCSI adapter",
94 ahc_aic7770_EISA_setup
95 },
96 {
97 ID_OLV_274xD,
98 0xFFFFFFFF,
99 "Adaptec (Olivetti OEM) 274X Differential SCSI adapter",
100 ahc_aic7770_EISA_setup
101 },
102 /* Generic chip probes for devices we don't know 'exactly' */
103 {
104 ID_AIC7770,
105 0xFFFFFFFF,
106 "Adaptec aic7770 SCSI adapter",
107 ahc_aic7770_EISA_setup
108 }
109 };
110 const int ahc_num_aic7770_devs = NUM_ELEMENTS(aic7770_ident_table);
111
112 struct aic7770_identity *
113 aic7770_find_device(uint32_t id)
114 {
115 struct aic7770_identity *entry;
116 int i;
117
118 for (i = 0; i < ahc_num_aic7770_devs; i++) {
119 entry = &aic7770_ident_table[i];
120 if (entry->full_id == (id & entry->id_mask))
121 return (entry);
122 }
123 return (NULL);
124 }
125
126 int
127 aic7770_config(struct ahc_softc *ahc, struct aic7770_identity *entry, u_int io)
128 {
129 u_long l;
130 int error;
131 int have_seeprom;
132 u_int hostconf;
133 u_int irq;
134 u_int intdef;
135
136 error = entry->setup(ahc);
137 have_seeprom = 0;
138 if (error != 0)
139 return (error);
140
141 error = aic7770_map_registers(ahc, io);
142 if (error != 0)
143 return (error);
144
145 /*
146 * Before we continue probing the card, ensure that
147 * its interrupts are *disabled*. We don't want
148 * a misstep to hang the machine in an interrupt
149 * storm.
150 */
151 ahc_intr_enable(ahc, FALSE);
152
153 ahc->description = entry->name;
154 error = ahc_softc_init(ahc);
155 if (error != 0)
156 return (error);
157
158 ahc->bus_chip_init = aic7770_chip_init;
159 ahc->bus_suspend = aic7770_suspend;
160 ahc->bus_resume = aic7770_resume;
161
162 error = ahc_reset(ahc, /*reinit*/FALSE);
163 if (error != 0)
164 return (error);
165
166 /* Make sure we have a valid interrupt vector */
167 intdef = ahc_inb(ahc, INTDEF);
168 irq = intdef & VECTOR;
169 switch (irq) {
170 case 9:
171 case 10:
172 case 11:
173 case 12:
174 case 14:
175 case 15:
176 break;
177 default:
178 printf("aic7770_config: invalid irq setting %d\n", intdef);
179 return (ENXIO);
180 }
181
182 if ((intdef & EDGE_TRIG) != 0)
183 ahc->flags |= AHC_EDGE_INTERRUPT;
184
185 switch (ahc->chip & (AHC_EISA|AHC_VL)) {
186 case AHC_EISA:
187 {
188 u_int biosctrl;
189 u_int scsiconf;
190 u_int scsiconf1;
191
192 biosctrl = ahc_inb(ahc, HA_274_BIOSCTRL);
193 scsiconf = ahc_inb(ahc, SCSICONF);
194 scsiconf1 = ahc_inb(ahc, SCSICONF + 1);
195
196 /* Get the primary channel information */
197 if ((biosctrl & CHANNEL_B_PRIMARY) != 0)
198 ahc->flags |= 1;
199
200 if ((biosctrl & BIOSMODE) == BIOSDISABLED) {
201 ahc->flags |= AHC_USEDEFAULTS;
202 } else {
203 if ((ahc->features & AHC_WIDE) != 0) {
204 ahc->our_id = scsiconf1 & HWSCSIID;
205 if (scsiconf & TERM_ENB)
206 ahc->flags |= AHC_TERM_ENB_A;
207 } else {
208 ahc->our_id = scsiconf & HSCSIID;
209 ahc->our_id_b = scsiconf1 & HSCSIID;
210 if (scsiconf & TERM_ENB)
211 ahc->flags |= AHC_TERM_ENB_A;
212 if (scsiconf1 & TERM_ENB)
213 ahc->flags |= AHC_TERM_ENB_B;
214 }
215 }
216 if ((ahc_inb(ahc, HA_274_BIOSGLOBAL) & HA_274_EXTENDED_TRANS))
217 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B;
218 break;
219 }
220 case AHC_VL:
221 {
222 have_seeprom = aha2840_load_seeprom(ahc);
223 break;
224 }
225 default:
226 break;
227 }
228 if (have_seeprom == 0) {
229 free(ahc->seep_config, M_DEVBUF);
230 ahc->seep_config = NULL;
231 }
232
233 /*
234 * Ensure autoflush is enabled
235 */
236 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
237
238 /* Setup the FIFO threshold and the bus off time */
239 hostconf = ahc_inb(ahc, HOSTCONF);
240 ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
241 ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
242
243 ahc->bus_softc.aic7770_softc.busspd = hostconf & DFTHRSH;
244 ahc->bus_softc.aic7770_softc.bustime = (hostconf << 2) & BOFF;
245
246 /*
247 * Generic aic7xxx initialization.
248 */
249 error = ahc_init(ahc);
250 if (error != 0)
251 return (error);
252
253 error = aic7770_map_int(ahc, irq);
254 if (error != 0)
255 return (error);
256
257 ahc_list_lock(&l);
258 /*
259 * Link this softc in with all other ahc instances.
260 */
261 ahc_softc_insert(ahc);
262
263 /*
264 * Enable the board's BUS drivers
265 */
266 ahc_outb(ahc, BCTL, ENABLE);
267
268 ahc_list_unlock(&l);
269
270 return (0);
271 }
272
273 static int
274 aic7770_chip_init(struct ahc_softc *ahc)
275 {
276 ahc_outb(ahc, BUSSPD, ahc->bus_softc.aic7770_softc.busspd);
277 ahc_outb(ahc, BUSTIME, ahc->bus_softc.aic7770_softc.bustime);
278 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
279 ahc_outb(ahc, BCTL, ENABLE);
280 return (ahc_chip_init(ahc));
281 }
282
283 static int
284 aic7770_suspend(struct ahc_softc *ahc)
285 {
286 return (ahc_suspend(ahc));
287 }
288
289 static int
290 aic7770_resume(struct ahc_softc *ahc)
291 {
292 return (ahc_resume(ahc));
293 }
294
295 /*
296 * Read the 284x SEEPROM.
297 */
298 static int
299 aha2840_load_seeprom(struct ahc_softc *ahc)
300 {
301 struct seeprom_descriptor sd;
302 struct seeprom_config *sc;
303 int have_seeprom;
304 uint8_t scsi_conf;
305
306 sd.sd_ahc = ahc;
307 sd.sd_control_offset = SEECTL_2840;
308 sd.sd_status_offset = STATUS_2840;
309 sd.sd_dataout_offset = STATUS_2840;
310 sd.sd_chip = C46;
311 sd.sd_MS = 0;
312 sd.sd_RDY = EEPROM_TF;
313 sd.sd_CS = CS_2840;
314 sd.sd_CK = CK_2840;
315 sd.sd_DO = DO_2840;
316 sd.sd_DI = DI_2840;
317 sc = ahc->seep_config;
318
319 if (bootverbose)
320 printf("%s: Reading SEEPROM...", ahc_name(ahc));
321 have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
322 /*start_addr*/0, sizeof(*sc)/2);
323
324 if (have_seeprom) {
325
326 if (ahc_verify_cksum(sc) == 0) {
327 if(bootverbose)
328 printf ("checksum error\n");
329 have_seeprom = 0;
330 } else if (bootverbose) {
331 printf("done.\n");
332 }
333 }
334
335 if (!have_seeprom) {
336 if (bootverbose)
337 printf("%s: No SEEPROM available\n", ahc_name(ahc));
338 ahc->flags |= AHC_USEDEFAULTS;
339 } else {
340 /*
341 * Put the data we've collected down into SRAM
342 * where ahc_init will find it.
343 */
344 int i;
345 int max_targ;
346 uint16_t discenable;
347
348 max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8;
349 discenable = 0;
350 for (i = 0; i < max_targ; i++){
351 uint8_t target_settings;
352
353 target_settings = (sc->device_flags[i] & CFXFER) << 4;
354 if (sc->device_flags[i] & CFSYNCH)
355 target_settings |= SOFS;
356 if (sc->device_flags[i] & CFWIDEB)
357 target_settings |= WIDEXFER;
358 if (sc->device_flags[i] & CFDISC)
359 discenable |= (0x01 << i);
360 ahc_outb(ahc, TARG_SCSIRATE + i, target_settings);
361 }
362 ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
363 ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));
364
365 ahc->our_id = sc->brtime_id & CFSCSIID;
366
367 scsi_conf = (ahc->our_id & 0x7);
368 if (sc->adapter_control & CFSPARITY)
369 scsi_conf |= ENSPCHK;
370 if (sc->adapter_control & CFRESETB)
371 scsi_conf |= RESET_SCSI;
372
373 if (sc->bios_control & CF284XEXTEND)
374 ahc->flags |= AHC_EXTENDED_TRANS_A;
375 /* Set SCSICONF info */
376 ahc_outb(ahc, SCSICONF, scsi_conf);
377
378 if (sc->adapter_control & CF284XSTERM)
379 ahc->flags |= AHC_TERM_ENB_A;
380 }
381 return (have_seeprom);
382 }
383
384 static int
385 ahc_aic7770_VL_setup(struct ahc_softc *ahc)
386 {
387 int error;
388
389 error = ahc_aic7770_setup(ahc);
390 ahc->chip |= AHC_VL;
391 return (error);
392 }
393
394 static int
395 ahc_aic7770_EISA_setup(struct ahc_softc *ahc)
396 {
397 int error;
398
399 error = ahc_aic7770_setup(ahc);
400 ahc->chip |= AHC_EISA;
401 return (error);
402 }
403
404 static int
405 ahc_aic7770_setup(struct ahc_softc *ahc)
406 {
407 ahc->channel = 'A';
408 ahc->channel_b = 'B';
409 ahc->chip = AHC_AIC7770;
410 ahc->features = AHC_AIC7770_FE;
411 ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
412 ahc->flags |= AHC_PAGESCBS;
413 ahc->instruction_ram_size = 448;
414 return (0);
415 }
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