[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / aic7xxx / aic7770.c

/*
 * Product specific probe and attach routines for:
 * 	27/284X and aic7770 motherboard SCSI controllers
 *
 * Copyright (c) 1994-1998, 2000, 2001 Justin T. Gibbs.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * $Id: //depot/aic7xxx/aic7xxx/aic7770.c#32 $
 *
 * $FreeBSD$
 */

#ifdef __linux__
#include "aic7xxx_osm.h"
#include "aic7xxx_inline.h"
#include "aic7xxx_93cx6.h"
#else
#include <dev/aic7xxx/aic7xxx_osm.h>
#include <dev/aic7xxx/aic7xxx_inline.h>
#include <dev/aic7xxx/aic7xxx_93cx6.h>
#endif

#define ID_AIC7770	0x04907770
#define ID_AHA_274x	0x04907771
#define ID_AHA_284xB	0x04907756 /* BIOS enabled */
#define ID_AHA_284x	0x04907757 /* BIOS disabled*/
#define	ID_OLV_274x	0x04907782 /* Olivetti OEM */
#define	ID_OLV_274xD	0x04907783 /* Olivetti OEM (Differential) */

static int aic7770_chip_init(struct ahc_softc *ahc);
static int aha2840_load_seeprom(struct ahc_softc *ahc);
static ahc_device_setup_t ahc_aic7770_VL_setup;
static ahc_device_setup_t ahc_aic7770_EISA_setup;
static ahc_device_setup_t ahc_aic7770_setup;

struct aic7770_identity aic7770_ident_table[] =
{
	{
		ID_AHA_274x,
		0xFFFFFFFF,
		"Adaptec 274X SCSI adapter",
		ahc_aic7770_EISA_setup
	},
	{
		ID_AHA_284xB,
		0xFFFFFFFE,
		"Adaptec 284X SCSI adapter",
		ahc_aic7770_VL_setup
	},
	{
		ID_AHA_284x,
		0xFFFFFFFE,
		"Adaptec 284X SCSI adapter (BIOS Disabled)",
		ahc_aic7770_VL_setup
	},
	{
		ID_OLV_274x,
		0xFFFFFFFF,
		"Adaptec (Olivetti OEM) 274X SCSI adapter",
		ahc_aic7770_EISA_setup
	},
	{
		ID_OLV_274xD,
		0xFFFFFFFF,
		"Adaptec (Olivetti OEM) 274X Differential SCSI adapter",
		ahc_aic7770_EISA_setup
	},
	/* Generic chip probes for devices we don't know 'exactly' */
	{
		ID_AIC7770,
		0xFFFFFFFF,
		"Adaptec aic7770 SCSI adapter",
		ahc_aic7770_EISA_setup
	}
};
const int ahc_num_aic7770_devs = ARRAY_SIZE(aic7770_ident_table);

struct aic7770_identity *
aic7770_find_device(uint32_t id)
{
	struct	aic7770_identity *entry;
	int	i;

	for (i = 0; i < ahc_num_aic7770_devs; i++) {
		entry = &aic7770_ident_table[i];
		if (entry->full_id == (id & entry->id_mask))
			return (entry);
	}
	return (NULL);
}

int
aic7770_config(struct ahc_softc *ahc, struct aic7770_identity *entry, u_int io)
{
	int	error;
	int	have_seeprom;
	u_int	hostconf;
	u_int   irq;
	u_int	intdef;

	error = entry->setup(ahc);
	have_seeprom = 0;
	if (error != 0)
		return (error);

	error = aic7770_map_registers(ahc, io);
	if (error != 0)
		return (error);

	/*
	 * Before we continue probing the card, ensure that
	 * its interrupts are *disabled*.  We don't want
	 * a misstep to hang the machine in an interrupt
	 * storm.
	 */
	ahc_intr_enable(ahc, FALSE);

	ahc->description = entry->name;
	error = ahc_softc_init(ahc);
	if (error != 0)
		return (error);

	ahc->bus_chip_init = aic7770_chip_init;

	error = ahc_reset(ahc, /*reinit*/FALSE);
	if (error != 0)
		return (error);

	/* Make sure we have a valid interrupt vector */
	intdef = ahc_inb(ahc, INTDEF);
	irq = intdef & VECTOR;
	switch (irq) {
	case 9:
	case 10:
	case 11:
	case 12:
	case 14:
	case 15:
		break;
	default:
		printk("aic7770_config: invalid irq setting %d\n", intdef);
		return (ENXIO);
	}

	if ((intdef & EDGE_TRIG) != 0)
		ahc->flags |= AHC_EDGE_INTERRUPT;

	switch (ahc->chip & (AHC_EISA|AHC_VL)) {
	case AHC_EISA:
	{
		u_int biosctrl;
		u_int scsiconf;
		u_int scsiconf1;

		biosctrl = ahc_inb(ahc, HA_274_BIOSCTRL);
		scsiconf = ahc_inb(ahc, SCSICONF);
		scsiconf1 = ahc_inb(ahc, SCSICONF + 1);

		/* Get the primary channel information */
		if ((biosctrl & CHANNEL_B_PRIMARY) != 0)
			ahc->flags |= 1;

		if ((biosctrl & BIOSMODE) == BIOSDISABLED) {
			ahc->flags |= AHC_USEDEFAULTS;
		} else {
			if ((ahc->features & AHC_WIDE) != 0) {
				ahc->our_id = scsiconf1 & HWSCSIID;
				if (scsiconf & TERM_ENB)
					ahc->flags |= AHC_TERM_ENB_A;
			} else {
				ahc->our_id = scsiconf & HSCSIID;
				ahc->our_id_b = scsiconf1 & HSCSIID;
				if (scsiconf & TERM_ENB)
					ahc->flags |= AHC_TERM_ENB_A;
				if (scsiconf1 & TERM_ENB)
					ahc->flags |= AHC_TERM_ENB_B;
			}
		}
		if ((ahc_inb(ahc, HA_274_BIOSGLOBAL) & HA_274_EXTENDED_TRANS))
			ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B;
		break;
	}
	case AHC_VL:
	{
		have_seeprom = aha2840_load_seeprom(ahc);
		break;
	}
	default:
		break;
	}
	if (have_seeprom == 0) {
		kfree(ahc->seep_config);
		ahc->seep_config = NULL;
	}

	/*
	 * Ensure autoflush is enabled
	 */
	ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);

	/* Setup the FIFO threshold and the bus off time */
	hostconf = ahc_inb(ahc, HOSTCONF);
	ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
	ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);

	ahc->bus_softc.aic7770_softc.busspd = hostconf & DFTHRSH;
	ahc->bus_softc.aic7770_softc.bustime = (hostconf << 2) & BOFF;

	/*
	 * Generic aic7xxx initialization.
	 */
	error = ahc_init(ahc);
	if (error != 0)
		return (error);

	error = aic7770_map_int(ahc, irq);
	if (error != 0)
		return (error);

	ahc->init_level++;

	/*
	 * Enable the board's BUS drivers
	 */
	ahc_outb(ahc, BCTL, ENABLE);
	return (0);
}

static int
aic7770_chip_init(struct ahc_softc *ahc)
{
	ahc_outb(ahc, BUSSPD, ahc->bus_softc.aic7770_softc.busspd);
	ahc_outb(ahc, BUSTIME, ahc->bus_softc.aic7770_softc.bustime);
	ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
	ahc_outb(ahc, BCTL, ENABLE);
	return (ahc_chip_init(ahc));
}

/*
 * Read the 284x SEEPROM.
 */
static int
aha2840_load_seeprom(struct ahc_softc *ahc)
{
	struct	seeprom_descriptor sd;
	struct	seeprom_config *sc;
	int	have_seeprom;
	uint8_t scsi_conf;

	sd.sd_ahc = ahc;
	sd.sd_control_offset = SEECTL_2840;
	sd.sd_status_offset = STATUS_2840;
	sd.sd_dataout_offset = STATUS_2840;		
	sd.sd_chip = C46;
	sd.sd_MS = 0;
	sd.sd_RDY = EEPROM_TF;
	sd.sd_CS = CS_2840;
	sd.sd_CK = CK_2840;
	sd.sd_DO = DO_2840;
	sd.sd_DI = DI_2840;
	sc = ahc->seep_config;

	if (bootverbose)
		printk("%s: Reading SEEPROM...", ahc_name(ahc));
	have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
					/*start_addr*/0, sizeof(*sc)/2);

	if (have_seeprom) {

		if (ahc_verify_cksum(sc) == 0) {
			if(bootverbose)
				printk ("checksum error\n");
			have_seeprom = 0;
		} else if (bootverbose) {
			printk("done.\n");
		}
	}

	if (!have_seeprom) {
		if (bootverbose)
			printk("%s: No SEEPROM available\n", ahc_name(ahc));
		ahc->flags |= AHC_USEDEFAULTS;
	} else {
		/*
		 * Put the data we've collected down into SRAM
		 * where ahc_init will find it.
		 */
		int	 i;
		int	 max_targ;
		uint16_t discenable;

		max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8;
		discenable = 0;
		for (i = 0; i < max_targ; i++){
			uint8_t target_settings;

			target_settings = (sc->device_flags[i] & CFXFER) << 4;
			if (sc->device_flags[i] & CFSYNCH)
				target_settings |= SOFS;
			if (sc->device_flags[i] & CFWIDEB)
				target_settings |= WIDEXFER;
			if (sc->device_flags[i] & CFDISC)
				discenable |= (0x01 << i);
			ahc_outb(ahc, TARG_SCSIRATE + i, target_settings);
		}
		ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
		ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));

		ahc->our_id = sc->brtime_id & CFSCSIID;

		scsi_conf = (ahc->our_id & 0x7);
		if (sc->adapter_control & CFSPARITY)
			scsi_conf |= ENSPCHK;
		if (sc->adapter_control & CFRESETB)
			scsi_conf |= RESET_SCSI;

		if (sc->bios_control & CF284XEXTEND)		
			ahc->flags |= AHC_EXTENDED_TRANS_A;
		/* Set SCSICONF info */
		ahc_outb(ahc, SCSICONF, scsi_conf);

		if (sc->adapter_control & CF284XSTERM)
			ahc->flags |= AHC_TERM_ENB_A;
	}
	return (have_seeprom);
}

static int
ahc_aic7770_VL_setup(struct ahc_softc *ahc)
{
	int error;

	error = ahc_aic7770_setup(ahc);
	ahc->chip |= AHC_VL;
	return (error);
}

static int
ahc_aic7770_EISA_setup(struct ahc_softc *ahc)
{
	int error;

	error = ahc_aic7770_setup(ahc);
	ahc->chip |= AHC_EISA;
	return (error);
}

static int
ahc_aic7770_setup(struct ahc_softc *ahc)
{
	ahc->channel = 'A';
	ahc->channel_b = 'B';
	ahc->chip = AHC_AIC7770;
	ahc->features = AHC_AIC7770_FE;
	ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
	ahc->flags |= AHC_PAGESCBS;
	ahc->instruction_ram_size = 448;
	return (0);
}
Commit	Line	Data
1da177e4 LT	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);
1da177e4 LT	63	static int aha2840_load_seeprom(struct ahc_softc *ahc);
	64	static ahc_device_setup_t ahc_aic7770_VL_setup;
	65	static ahc_device_setup_t ahc_aic7770_EISA_setup;
	66	static ahc_device_setup_t ahc_aic7770_setup;
	67
	68	struct aic7770_identity aic7770_ident_table[] =
	69	{
	70	{
	71	ID_AHA_274x,
	72	0xFFFFFFFF,
	73	"Adaptec 274X SCSI adapter",
	74	ahc_aic7770_EISA_setup
	75	},
	76	{
	77	ID_AHA_284xB,
	78	0xFFFFFFFE,
	79	"Adaptec 284X SCSI adapter",
	80	ahc_aic7770_VL_setup
	81	},
	82	{
	83	ID_AHA_284x,
	84	0xFFFFFFFE,
	85	"Adaptec 284X SCSI adapter (BIOS Disabled)",
	86	ahc_aic7770_VL_setup
	87	},
	88	{
	89	ID_OLV_274x,
	90	0xFFFFFFFF,
	91	"Adaptec (Olivetti OEM) 274X SCSI adapter",
	92	ahc_aic7770_EISA_setup
	93	},
	94	{
	95	ID_OLV_274xD,
	96	0xFFFFFFFF,
	97	"Adaptec (Olivetti OEM) 274X Differential SCSI adapter",
	98	ahc_aic7770_EISA_setup
	99	},
	100	/* Generic chip probes for devices we don't know 'exactly' */
	101	{
	102	ID_AIC7770,
	103	0xFFFFFFFF,
	104	"Adaptec aic7770 SCSI adapter",
	105	ahc_aic7770_EISA_setup
	106	}
	107	};
6391a113	108	const int ahc_num_aic7770_devs = ARRAY_SIZE(aic7770_ident_table);
1da177e4 LT	109
	110	struct aic7770_identity *
	111	aic7770_find_device(uint32_t id)
	112	{
	113	struct aic7770_identity *entry;
	114	int i;
	115
	116	for (i = 0; i < ahc_num_aic7770_devs; i++) {
	117	entry = &aic7770_ident_table[i];
	118	if (entry->full_id == (id & entry->id_mask))
	119	return (entry);
	120	}
	121	return (NULL);
	122	}
	123
	124	int
	125	aic7770_config(struct ahc_softc ahc, struct aic7770_identity entry, u_int io)
	126	{
1da177e4 LT	127	int error;
	128	int have_seeprom;
	129	u_int hostconf;
	130	u_int irq;
	131	u_int intdef;
	132
	133	error = entry->setup(ahc);
	134	have_seeprom = 0;
	135	if (error != 0)
	136	return (error);
	137
	138	error = aic7770_map_registers(ahc, io);
	139	if (error != 0)
	140	return (error);
	141
	142	/*
	143	* Before we continue probing the card, ensure that
	144	* its interrupts are disabled. We don't want
	145	* a misstep to hang the machine in an interrupt
	146	* storm.
	147	*/
	148	ahc_intr_enable(ahc, FALSE);
	149
	150	ahc->description = entry->name;
	151	error = ahc_softc_init(ahc);
	152	if (error != 0)
	153	return (error);
	154
	155	ahc->bus_chip_init = aic7770_chip_init;
1da177e4 LT	156
	157	error = ahc_reset(ahc, /reinit/FALSE);
	158	if (error != 0)
	159	return (error);
	160
	161	/* Make sure we have a valid interrupt vector */
	162	intdef = ahc_inb(ahc, INTDEF);
	163	irq = intdef & VECTOR;
	164	switch (irq) {
	165	case 9:
	166	case 10:
	167	case 11:
	168	case 12:
	169	case 14:
	170	case 15:
	171	break;
	172	default:
48813cf9	173	printk("aic7770_config: invalid irq setting %d\n", intdef);
1da177e4 LT	174	return (ENXIO);
	175	}
	176
	177	if ((intdef & EDGE_TRIG) != 0)
	178	ahc->flags \|= AHC_EDGE_INTERRUPT;
	179
	180	switch (ahc->chip & (AHC_EISA\|AHC_VL)) {
	181	case AHC_EISA:
	182	{
	183	u_int biosctrl;
	184	u_int scsiconf;
	185	u_int scsiconf1;
	186
	187	biosctrl = ahc_inb(ahc, HA_274_BIOSCTRL);
	188	scsiconf = ahc_inb(ahc, SCSICONF);
	189	scsiconf1 = ahc_inb(ahc, SCSICONF + 1);
	190
	191	/* Get the primary channel information */
	192	if ((biosctrl & CHANNEL_B_PRIMARY) != 0)
	193	ahc->flags \|= 1;
	194
	195	if ((biosctrl & BIOSMODE) == BIOSDISABLED) {
	196	ahc->flags \|= AHC_USEDEFAULTS;
	197	} else {
	198	if ((ahc->features & AHC_WIDE) != 0) {
	199	ahc->our_id = scsiconf1 & HWSCSIID;
	200	if (scsiconf & TERM_ENB)
	201	ahc->flags \|= AHC_TERM_ENB_A;
	202	} else {
	203	ahc->our_id = scsiconf & HSCSIID;
	204	ahc->our_id_b = scsiconf1 & HSCSIID;
	205	if (scsiconf & TERM_ENB)
	206	ahc->flags \|= AHC_TERM_ENB_A;
	207	if (scsiconf1 & TERM_ENB)
	208	ahc->flags \|= AHC_TERM_ENB_B;
	209	}
	210	}
	211	if ((ahc_inb(ahc, HA_274_BIOSGLOBAL) & HA_274_EXTENDED_TRANS))
	212	ahc->flags \|= AHC_EXTENDED_TRANS_A\|AHC_EXTENDED_TRANS_B;
	213	break;
	214	}
	215	case AHC_VL:
	216	{
	217	have_seeprom = aha2840_load_seeprom(ahc);
	218	break;
	219	}
	220	default:
	221	break;
	222	}
	223	if (have_seeprom == 0) {
48813cf9	224	kfree(ahc->seep_config);
1da177e4 LT	225	ahc->seep_config = NULL;
	226	}
	227
	228	/*
	229	* Ensure autoflush is enabled
	230	*/
	231	ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
	232
	233	/* Setup the FIFO threshold and the bus off time */
	234	hostconf = ahc_inb(ahc, HOSTCONF);
	235	ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
	236	ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
	237
	238	ahc->bus_softc.aic7770_softc.busspd = hostconf & DFTHRSH;
	239	ahc->bus_softc.aic7770_softc.bustime = (hostconf << 2) & BOFF;
	240
	241	/*
	242	* Generic aic7xxx initialization.
	243	*/
	244	error = ahc_init(ahc);
	245	if (error != 0)
	246	return (error);
	247
	248	error = aic7770_map_int(ahc, irq);
	249	if (error != 0)
	250	return (error);
	251
2a40342e	252	ahc->init_level++;
1da177e4 LT	253
	254	/*
	255	* Enable the board's BUS drivers
	256	*/
	257	ahc_outb(ahc, BCTL, ENABLE);
1da177e4 LT	258	return (0);
	259	}
	260
	261	static int
	262	aic7770_chip_init(struct ahc_softc *ahc)
	263	{
	264	ahc_outb(ahc, BUSSPD, ahc->bus_softc.aic7770_softc.busspd);
	265	ahc_outb(ahc, BUSTIME, ahc->bus_softc.aic7770_softc.bustime);
	266	ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
	267	ahc_outb(ahc, BCTL, ENABLE);
	268	return (ahc_chip_init(ahc));
	269	}
	270
1da177e4 LT	271	/*
	272	* Read the 284x SEEPROM.
	273	*/
	274	static int
	275	aha2840_load_seeprom(struct ahc_softc *ahc)
	276	{
	277	struct seeprom_descriptor sd;
	278	struct seeprom_config *sc;
	279	int have_seeprom;
	280	uint8_t scsi_conf;
	281
	282	sd.sd_ahc = ahc;
	283	sd.sd_control_offset = SEECTL_2840;
	284	sd.sd_status_offset = STATUS_2840;
	285	sd.sd_dataout_offset = STATUS_2840;
	286	sd.sd_chip = C46;
	287	sd.sd_MS = 0;
	288	sd.sd_RDY = EEPROM_TF;
	289	sd.sd_CS = CS_2840;
	290	sd.sd_CK = CK_2840;
	291	sd.sd_DO = DO_2840;
	292	sd.sd_DI = DI_2840;
	293	sc = ahc->seep_config;
	294
	295	if (bootverbose)
48813cf9	296	printk("%s: Reading SEEPROM...", ahc_name(ahc));
1da177e4 LT	297	have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
	298	/start_addr/0, sizeof(*sc)/2);
	299
	300	if (have_seeprom) {
	301
	302	if (ahc_verify_cksum(sc) == 0) {
	303	if(bootverbose)
48813cf9	304	printk ("checksum error\n");
1da177e4 LT	305	have_seeprom = 0;
1da177e4 LT	306	} else if (bootverbose) {
48813cf9	307	printk("done.\n");
1da177e4 LT	308	}
	309	}
	310
	311	if (!have_seeprom) {
	312	if (bootverbose)
48813cf9	313	printk("%s: No SEEPROM available\n", ahc_name(ahc));
1da177e4 LT	314	ahc->flags \|= AHC_USEDEFAULTS;
	315	} else {
	316	/*
	317	* Put the data we've collected down into SRAM
	318	* where ahc_init will find it.
	319	*/
	320	int i;
	321	int max_targ;
	322	uint16_t discenable;
	323
	324	max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8;
	325	discenable = 0;
	326	for (i = 0; i < max_targ; i++){
	327	uint8_t target_settings;
	328
	329	target_settings = (sc->device_flags[i] & CFXFER) << 4;
	330	if (sc->device_flags[i] & CFSYNCH)
	331	target_settings \|= SOFS;
	332	if (sc->device_flags[i] & CFWIDEB)
	333	target_settings \|= WIDEXFER;
	334	if (sc->device_flags[i] & CFDISC)
	335	discenable \|= (0x01 << i);
	336	ahc_outb(ahc, TARG_SCSIRATE + i, target_settings);
	337	}
	338	ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
	339	ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));
	340
	341	ahc->our_id = sc->brtime_id & CFSCSIID;
	342
	343	scsi_conf = (ahc->our_id & 0x7);
	344	if (sc->adapter_control & CFSPARITY)
	345	scsi_conf \|= ENSPCHK;
	346	if (sc->adapter_control & CFRESETB)
	347	scsi_conf \|= RESET_SCSI;
	348
	349	if (sc->bios_control & CF284XEXTEND)
	350	ahc->flags \|= AHC_EXTENDED_TRANS_A;
	351	/* Set SCSICONF info */
	352	ahc_outb(ahc, SCSICONF, scsi_conf);
	353
	354	if (sc->adapter_control & CF284XSTERM)
	355	ahc->flags \|= AHC_TERM_ENB_A;
	356	}
	357	return (have_seeprom);
	358	}
	359
	360	static int
	361	ahc_aic7770_VL_setup(struct ahc_softc *ahc)
	362	{
	363	int error;
	364
	365	error = ahc_aic7770_setup(ahc);
	366	ahc->chip \|= AHC_VL;
	367	return (error);
	368	}
	369
	370	static int
	371	ahc_aic7770_EISA_setup(struct ahc_softc *ahc)
	372	{
	373	int error;
	374
	375	error = ahc_aic7770_setup(ahc);
	376	ahc->chip \|= AHC_EISA;
	377	return (error);
378	}
379
380	static int
381	ahc_aic7770_setup(struct ahc_softc *ahc)
382	{
383	ahc->channel = 'A';
384	ahc->channel_b = 'B';
385	ahc->chip = AHC_AIC7770;
386	ahc->features = AHC_AIC7770_FE;
387	ahc->bugs \|= AHC_TMODE_WIDEODD_BUG;
388	ahc->flags \|= AHC_PAGESCBS;
389	ahc->instruction_ram_size = 448;
390	return (0);
391	}