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dbau1550.c revision 1.4 
      1 /* $NetBSD: dbau1550.c,v 1.4 2006/02/16 01:52:57 gdamore Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2006 Itronix Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Garrett D'Amore for Itronix Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. The name of Itronix Inc. may not be used to endorse
     18  *    or promote products derived from this software without specific
     19  *    prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
     25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     28  * ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: dbau1550.c,v 1.4 2006/02/16 01:52:57 gdamore Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <machine/bus.h>
     39 #include <machine/locore.h>
     40 #include <evbmips/alchemy/obiovar.h>
     41 #include <evbmips/alchemy/board.h>
     42 #include <evbmips/alchemy/dbau1550reg.h>
     43 
     44 #define	GET16(x)	\
     45 	(*((volatile uint16_t *)MIPS_PHYS_TO_KSEG1(x)))
     46 #define	PUT16(x, v)	\
     47 	(*((volatile uint16_t *)MIPS_PHYS_TO_KSEG1(x)) = (v))
     48 
     49 static void dbau1550_init(void);
     50 static int dbau1550_pci_intr_map(struct pci_attach_args *,
     51 				 pci_intr_handle_t *);
     52 static void dbau1550_poweroff(void);
     53 static void dbau1550_reboot(void);
     54 
     55 static const struct obiodev dbau1550_devices[] = {
     56 #if 0
     57 	{ "aupcmcia", -1, -1 },
     58 	{ "aupsc", -1, -1 },
     59 	{ "aupsc", -1, -1 },
     60 	{ "aupsc", -1, -1 },
     61 #endif
     62 	{ NULL },
     63 };
     64 
     65 static struct alchemy_board dbau1550_info = {
     66 	"AMD Alchemy DBAu1550",
     67 	dbau1550_devices,
     68 	dbau1550_init,
     69 	dbau1550_pci_intr_map,
     70 	dbau1550_reboot,
     71 	dbau1550_poweroff,
     72 };
     73 
     74 const struct alchemy_board *
     75 board_info(void)
     76 {
     77 
     78 	return &dbau1550_info;
     79 }
     80 
     81 void
     82 dbau1550_init(void)
     83 {
     84 	uint16_t		whoami;
     85 
     86 	if (MIPS_PRID_COPTS(cpu_id) != MIPS_AU1550)
     87 		panic("dbau1550: CPU not Au1550");
     88 
     89 	/* check the whoami register for a match */
     90 	whoami = GET16(DBAU1550_WHOAMI);
     91 
     92 	if (DBAU1550_WHOAMI_BOARD(whoami) != DBAU1550_WHOAMI_DBAU1550_REV1)
     93 		panic("dbau1550: WHOAMI (%x) not DBAu1550!", whoami);
     94 
     95 	printf("DBAu1550 (cabernet), CPLDv%d, ",
     96 	    DBAU1550_WHOAMI_CPLD(whoami));
     97 
     98 	if (DBAU1550_WHOAMI_DAUGHTER(whoami) != 0xf)
     99 		printf("daughtercard 0x%x\n",
    100 		    DBAU1550_WHOAMI_DAUGHTER(whoami));
    101 	else
    102 		printf("no daughtercard\n");
    103 
    104 	/* leave console and clocks alone -- YAMON should have got it right! */
    105 }
    106 
    107 int
    108 dbau1550_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
    109 {
    110 	/*
    111 	 * This platform has one onboard PCI IDE controller, and two
    112 	 * PCI expansion slots.
    113 	 */
    114 	static const int irqmap[3/*device*/][4/*pin*/] = {
    115 		{  5, -1, -1, -1 },	/* 11: IDE */
    116 		{  2,  5,  6,  1 },	/* 12: PCI Slot 2 */
    117 		{  1,  2,  5,  6 },	/* 13: PCI Slot 3 */
    118 	};
    119 	int	pin, dev, irq;
    120 
    121 	/* if interrupt pin not used... */
    122 	if ((pin = pa->pa_intrpin) == 0)
    123 		return 1;
    124 
    125 	if (pin > 4) {
    126 		printf("pci: bad interrupt pin %d\n", pin);
    127 		return 1;
    128 	}
    129 
    130 	pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, NULL, &dev, NULL);
    131 	if ((dev < 11) || (dev > 13)) {
    132 		printf("pci: bad device %d\n", dev);
    133 		return 1;
    134 	}
    135 
    136 	if ((irq = irqmap[dev - 11][pin - 1]) == -1) {
    137 		printf("pci: no IRQ routing for device %d pin %d\n", dev, pin);
    138 		return 1;
    139 	}
    140 
    141 	*ihp = irq;
    142 	return 0;
    143 }
    144 
    145 void
    146 dbau1550_reboot(void)
    147 {
    148 	PUT16(DBAU1550_SOFTWARE_RESET, 0);
    149 	delay(100000);	/* 100 msec */
    150 }
    151 
    152 void
    153 dbau1550_poweroff(void)
    154 {
    155 	printf("\n- poweroff -\n");
    156 	PUT16(DBAU1550_SOFTWARE_RESET,
    157 	    DBAU1550_SOFTWARE_RESET_PWROFF | DBAU1550_SOFTWARE_RESET_RESET);
    158 	delay(100000);	/* 100 msec */
    159 }
    160