xref: /linux/drivers/scsi/aic7xxx/aic7770.c (revision 3eb66e91a25497065c5322b1268cbc3953642227)
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 #include "aic7xxx_osm.h"
46 #include "aic7xxx_inline.h"
47 #include "aic7xxx_93cx6.h"
48 
49 #define ID_AIC7770	0x04907770
50 #define ID_AHA_274x	0x04907771
51 #define ID_AHA_284xB	0x04907756 /* BIOS enabled */
52 #define ID_AHA_284x	0x04907757 /* BIOS disabled*/
53 #define	ID_OLV_274x	0x04907782 /* Olivetti OEM */
54 #define	ID_OLV_274xD	0x04907783 /* Olivetti OEM (Differential) */
55 
56 static int aic7770_chip_init(struct ahc_softc *ahc);
57 static int aha2840_load_seeprom(struct ahc_softc *ahc);
58 static ahc_device_setup_t ahc_aic7770_VL_setup;
59 static ahc_device_setup_t ahc_aic7770_EISA_setup;
60 static ahc_device_setup_t ahc_aic7770_setup;
61 
62 struct aic7770_identity aic7770_ident_table[] =
63 {
64 	{
65 		ID_AHA_274x,
66 		0xFFFFFFFF,
67 		"Adaptec 274X SCSI adapter",
68 		ahc_aic7770_EISA_setup
69 	},
70 	{
71 		ID_AHA_284xB,
72 		0xFFFFFFFE,
73 		"Adaptec 284X SCSI adapter",
74 		ahc_aic7770_VL_setup
75 	},
76 	{
77 		ID_AHA_284x,
78 		0xFFFFFFFE,
79 		"Adaptec 284X SCSI adapter (BIOS Disabled)",
80 		ahc_aic7770_VL_setup
81 	},
82 	{
83 		ID_OLV_274x,
84 		0xFFFFFFFF,
85 		"Adaptec (Olivetti OEM) 274X SCSI adapter",
86 		ahc_aic7770_EISA_setup
87 	},
88 	{
89 		ID_OLV_274xD,
90 		0xFFFFFFFF,
91 		"Adaptec (Olivetti OEM) 274X Differential SCSI adapter",
92 		ahc_aic7770_EISA_setup
93 	},
94 	/* Generic chip probes for devices we don't know 'exactly' */
95 	{
96 		ID_AIC7770,
97 		0xFFFFFFFF,
98 		"Adaptec aic7770 SCSI adapter",
99 		ahc_aic7770_EISA_setup
100 	}
101 };
102 const int ahc_num_aic7770_devs = ARRAY_SIZE(aic7770_ident_table);
103 
104 struct aic7770_identity *
aic7770_find_device(uint32_t id)105 aic7770_find_device(uint32_t id)
106 {
107 	struct	aic7770_identity *entry;
108 	int	i;
109 
110 	for (i = 0; i < ahc_num_aic7770_devs; i++) {
111 		entry = &aic7770_ident_table[i];
112 		if (entry->full_id == (id & entry->id_mask))
113 			return (entry);
114 	}
115 	return (NULL);
116 }
117 
118 int
aic7770_config(struct ahc_softc * ahc,struct aic7770_identity * entry,u_int io)119 aic7770_config(struct ahc_softc *ahc, struct aic7770_identity *entry, u_int io)
120 {
121 	int	error;
122 	int	have_seeprom;
123 	u_int	hostconf;
124 	u_int   irq;
125 	u_int	intdef;
126 
127 	error = entry->setup(ahc);
128 	have_seeprom = 0;
129 	if (error != 0)
130 		return (error);
131 
132 	error = aic7770_map_registers(ahc, io);
133 	if (error != 0)
134 		return (error);
135 
136 	/*
137 	 * Before we continue probing the card, ensure that
138 	 * its interrupts are *disabled*.  We don't want
139 	 * a misstep to hang the machine in an interrupt
140 	 * storm.
141 	 */
142 	ahc_intr_enable(ahc, FALSE);
143 
144 	ahc->description = entry->name;
145 	error = ahc_softc_init(ahc);
146 	if (error != 0)
147 		return (error);
148 
149 	ahc->bus_chip_init = aic7770_chip_init;
150 
151 	error = ahc_reset(ahc, /*reinit*/FALSE);
152 	if (error != 0)
153 		return (error);
154 
155 	/* Make sure we have a valid interrupt vector */
156 	intdef = ahc_inb(ahc, INTDEF);
157 	irq = intdef & VECTOR;
158 	switch (irq) {
159 	case 9:
160 	case 10:
161 	case 11:
162 	case 12:
163 	case 14:
164 	case 15:
165 		break;
166 	default:
167 		printk("aic7770_config: invalid irq setting %d\n", intdef);
168 		return (ENXIO);
169 	}
170 
171 	if ((intdef & EDGE_TRIG) != 0)
172 		ahc->flags |= AHC_EDGE_INTERRUPT;
173 
174 	switch (ahc->chip & (AHC_EISA|AHC_VL)) {
175 	case AHC_EISA:
176 	{
177 		u_int biosctrl;
178 		u_int scsiconf;
179 		u_int scsiconf1;
180 
181 		biosctrl = ahc_inb(ahc, HA_274_BIOSCTRL);
182 		scsiconf = ahc_inb(ahc, SCSICONF);
183 		scsiconf1 = ahc_inb(ahc, SCSICONF + 1);
184 
185 		/* Get the primary channel information */
186 		if ((biosctrl & CHANNEL_B_PRIMARY) != 0)
187 			ahc->flags |= 1;
188 
189 		if ((biosctrl & BIOSMODE) == BIOSDISABLED) {
190 			ahc->flags |= AHC_USEDEFAULTS;
191 		} else {
192 			if ((ahc->features & AHC_WIDE) != 0) {
193 				ahc->our_id = scsiconf1 & HWSCSIID;
194 				if (scsiconf & TERM_ENB)
195 					ahc->flags |= AHC_TERM_ENB_A;
196 			} else {
197 				ahc->our_id = scsiconf & HSCSIID;
198 				ahc->our_id_b = scsiconf1 & HSCSIID;
199 				if (scsiconf & TERM_ENB)
200 					ahc->flags |= AHC_TERM_ENB_A;
201 				if (scsiconf1 & TERM_ENB)
202 					ahc->flags |= AHC_TERM_ENB_B;
203 			}
204 		}
205 		if ((ahc_inb(ahc, HA_274_BIOSGLOBAL) & HA_274_EXTENDED_TRANS))
206 			ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B;
207 		break;
208 	}
209 	case AHC_VL:
210 	{
211 		have_seeprom = aha2840_load_seeprom(ahc);
212 		break;
213 	}
214 	default:
215 		break;
216 	}
217 	if (have_seeprom == 0) {
218 		kfree(ahc->seep_config);
219 		ahc->seep_config = NULL;
220 	}
221 
222 	/*
223 	 * Ensure autoflush is enabled
224 	 */
225 	ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
226 
227 	/* Setup the FIFO threshold and the bus off time */
228 	hostconf = ahc_inb(ahc, HOSTCONF);
229 	ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
230 	ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
231 
232 	ahc->bus_softc.aic7770_softc.busspd = hostconf & DFTHRSH;
233 	ahc->bus_softc.aic7770_softc.bustime = (hostconf << 2) & BOFF;
234 
235 	/*
236 	 * Generic aic7xxx initialization.
237 	 */
238 	error = ahc_init(ahc);
239 	if (error != 0)
240 		return (error);
241 
242 	error = aic7770_map_int(ahc, irq);
243 	if (error != 0)
244 		return (error);
245 
246 	ahc->init_level++;
247 
248 	/*
249 	 * Enable the board's BUS drivers
250 	 */
251 	ahc_outb(ahc, BCTL, ENABLE);
252 	return (0);
253 }
254 
255 static int
aic7770_chip_init(struct ahc_softc * ahc)256 aic7770_chip_init(struct ahc_softc *ahc)
257 {
258 	ahc_outb(ahc, BUSSPD, ahc->bus_softc.aic7770_softc.busspd);
259 	ahc_outb(ahc, BUSTIME, ahc->bus_softc.aic7770_softc.bustime);
260 	ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
261 	ahc_outb(ahc, BCTL, ENABLE);
262 	return (ahc_chip_init(ahc));
263 }
264 
265 /*
266  * Read the 284x SEEPROM.
267  */
268 static int
aha2840_load_seeprom(struct ahc_softc * ahc)269 aha2840_load_seeprom(struct ahc_softc *ahc)
270 {
271 	struct	seeprom_descriptor sd;
272 	struct	seeprom_config *sc;
273 	int	have_seeprom;
274 	uint8_t scsi_conf;
275 
276 	sd.sd_ahc = ahc;
277 	sd.sd_control_offset = SEECTL_2840;
278 	sd.sd_status_offset = STATUS_2840;
279 	sd.sd_dataout_offset = STATUS_2840;
280 	sd.sd_chip = C46;
281 	sd.sd_MS = 0;
282 	sd.sd_RDY = EEPROM_TF;
283 	sd.sd_CS = CS_2840;
284 	sd.sd_CK = CK_2840;
285 	sd.sd_DO = DO_2840;
286 	sd.sd_DI = DI_2840;
287 	sc = ahc->seep_config;
288 
289 	if (bootverbose)
290 		printk("%s: Reading SEEPROM...", ahc_name(ahc));
291 	have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
292 					/*start_addr*/0, sizeof(*sc)/2);
293 
294 	if (have_seeprom) {
295 
296 		if (ahc_verify_cksum(sc) == 0) {
297 			if(bootverbose)
298 				printk ("checksum error\n");
299 			have_seeprom = 0;
300 		} else if (bootverbose) {
301 			printk("done.\n");
302 		}
303 	}
304 
305 	if (!have_seeprom) {
306 		if (bootverbose)
307 			printk("%s: No SEEPROM available\n", ahc_name(ahc));
308 		ahc->flags |= AHC_USEDEFAULTS;
309 	} else {
310 		/*
311 		 * Put the data we've collected down into SRAM
312 		 * where ahc_init will find it.
313 		 */
314 		int	 i;
315 		int	 max_targ;
316 		uint16_t discenable;
317 
318 		max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8;
319 		discenable = 0;
320 		for (i = 0; i < max_targ; i++){
321 			uint8_t target_settings;
322 
323 			target_settings = (sc->device_flags[i] & CFXFER) << 4;
324 			if (sc->device_flags[i] & CFSYNCH)
325 				target_settings |= SOFS;
326 			if (sc->device_flags[i] & CFWIDEB)
327 				target_settings |= WIDEXFER;
328 			if (sc->device_flags[i] & CFDISC)
329 				discenable |= (0x01 << i);
330 			ahc_outb(ahc, TARG_SCSIRATE + i, target_settings);
331 		}
332 		ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
333 		ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));
334 
335 		ahc->our_id = sc->brtime_id & CFSCSIID;
336 
337 		scsi_conf = (ahc->our_id & 0x7);
338 		if (sc->adapter_control & CFSPARITY)
339 			scsi_conf |= ENSPCHK;
340 		if (sc->adapter_control & CFRESETB)
341 			scsi_conf |= RESET_SCSI;
342 
343 		if (sc->bios_control & CF284XEXTEND)
344 			ahc->flags |= AHC_EXTENDED_TRANS_A;
345 		/* Set SCSICONF info */
346 		ahc_outb(ahc, SCSICONF, scsi_conf);
347 
348 		if (sc->adapter_control & CF284XSTERM)
349 			ahc->flags |= AHC_TERM_ENB_A;
350 	}
351 	return (have_seeprom);
352 }
353 
354 static int
ahc_aic7770_VL_setup(struct ahc_softc * ahc)355 ahc_aic7770_VL_setup(struct ahc_softc *ahc)
356 {
357 	int error;
358 
359 	error = ahc_aic7770_setup(ahc);
360 	ahc->chip |= AHC_VL;
361 	return (error);
362 }
363 
364 static int
ahc_aic7770_EISA_setup(struct ahc_softc * ahc)365 ahc_aic7770_EISA_setup(struct ahc_softc *ahc)
366 {
367 	int error;
368 
369 	error = ahc_aic7770_setup(ahc);
370 	ahc->chip |= AHC_EISA;
371 	return (error);
372 }
373 
374 static int
ahc_aic7770_setup(struct ahc_softc * ahc)375 ahc_aic7770_setup(struct ahc_softc *ahc)
376 {
377 	ahc->channel = 'A';
378 	ahc->channel_b = 'B';
379 	ahc->chip = AHC_AIC7770;
380 	ahc->features = AHC_AIC7770_FE;
381 	ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
382 	ahc->flags |= AHC_PAGESCBS;
383 	ahc->instruction_ram_size = 448;
384 	return (0);
385 }
386