[net-next-2.6.git] / arch / mips / sibyte / sb1250 / setup.c

/*
 * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/string.h>

#include <asm/bootinfo.h>
#include <asm/mipsregs.h>
#include <asm/io.h>
#include <asm/sibyte/sb1250.h>
#include <asm/sibyte/sb1250_regs.h>
#include <asm/sibyte/sb1250_scd.h>

unsigned int sb1_pass;
unsigned int soc_pass;
unsigned int soc_type;
EXPORT_SYMBOL(soc_type);
unsigned int periph_rev;
unsigned int zbbus_mhz;
EXPORT_SYMBOL(zbbus_mhz);

static char *soc_str;
static char *pass_str;
static unsigned int war_pass;	/* XXXKW don't overload PASS defines? */

static int __init setup_bcm1250(void)
{
	int ret = 0;

	switch (soc_pass) {
	case K_SYS_REVISION_BCM1250_PASS1:
		periph_rev = 1;
		pass_str = "Pass 1";
		break;
	case K_SYS_REVISION_BCM1250_A10:
		periph_rev = 2;
		pass_str = "A8/A10";
		/* XXXKW different war_pass? */
		war_pass = K_SYS_REVISION_BCM1250_PASS2;
		break;
	case K_SYS_REVISION_BCM1250_PASS2_2:
		periph_rev = 2;
		pass_str = "B1";
		break;
	case K_SYS_REVISION_BCM1250_B2:
		periph_rev = 2;
		pass_str = "B2";
		war_pass = K_SYS_REVISION_BCM1250_PASS2_2;
		break;
	case K_SYS_REVISION_BCM1250_PASS3:
		periph_rev = 3;
		pass_str = "C0";
		break;
	case K_SYS_REVISION_BCM1250_C1:
		periph_rev = 3;
		pass_str = "C1";
		break;
	default:
		if (soc_pass < K_SYS_REVISION_BCM1250_PASS2_2) {
			periph_rev = 2;
			pass_str = "A0-A6";
			war_pass = K_SYS_REVISION_BCM1250_PASS2;
		} else {
			printk("Unknown BCM1250 rev %x\n", soc_pass);
			ret = 1;
		}
		break;
	}

	return ret;
}

int sb1250_m3_workaround_needed(void)
{
	switch (soc_type) {
	case K_SYS_SOC_TYPE_BCM1250:
	case K_SYS_SOC_TYPE_BCM1250_ALT:
	case K_SYS_SOC_TYPE_BCM1250_ALT2:
	case K_SYS_SOC_TYPE_BCM1125:
	case K_SYS_SOC_TYPE_BCM1125H:
		return soc_pass < K_SYS_REVISION_BCM1250_C0;

	default:
		return 0;
	}
}

static int __init setup_bcm112x(void)
{
	int ret = 0;

	switch (soc_pass) {
	case 0:
		/* Early build didn't have revid set */
		periph_rev = 3;
		pass_str = "A1";
		war_pass = K_SYS_REVISION_BCM112x_A1;
		break;
	case K_SYS_REVISION_BCM112x_A1:
		periph_rev = 3;
		pass_str = "A1";
		break;
	case K_SYS_REVISION_BCM112x_A2:
		periph_rev = 3;
		pass_str = "A2";
		break;
	case K_SYS_REVISION_BCM112x_A3:
		periph_rev = 3;
		pass_str = "A3";
		break;
	case K_SYS_REVISION_BCM112x_A4:
		periph_rev = 3;
		pass_str = "A4";
		break;
	case K_SYS_REVISION_BCM112x_B0:
		periph_rev = 3;
		pass_str = "B0";
		break;
	default:
		printk("Unknown %s rev %x\n", soc_str, soc_pass);
		ret = 1;
	}

	return ret;
}

/* Setup code likely to be common to all SiByte platforms */

static int __init sys_rev_decode(void)
{
	int ret = 0;

	war_pass = soc_pass;
	switch (soc_type) {
	case K_SYS_SOC_TYPE_BCM1250:
	case K_SYS_SOC_TYPE_BCM1250_ALT:
	case K_SYS_SOC_TYPE_BCM1250_ALT2:
		soc_str = "BCM1250";
		ret = setup_bcm1250();
		break;
	case K_SYS_SOC_TYPE_BCM1120:
		soc_str = "BCM1120";
		ret = setup_bcm112x();
		break;
	case K_SYS_SOC_TYPE_BCM1125:
		soc_str = "BCM1125";
		ret = setup_bcm112x();
		break;
	case K_SYS_SOC_TYPE_BCM1125H:
		soc_str = "BCM1125H";
		ret = setup_bcm112x();
		break;
	default:
		printk("Unknown SOC type %x\n", soc_type);
		ret = 1;
		break;
	}

	return ret;
}

void __init sb1250_setup(void)
{
	uint64_t sys_rev;
	int plldiv;
	int bad_config = 0;

	sb1_pass = read_c0_prid() & 0xff;
	sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION));
	soc_type = SYS_SOC_TYPE(sys_rev);
	soc_pass = G_SYS_REVISION(sys_rev);

	if (sys_rev_decode()) {
		printk("Restart after failure to identify SiByte chip\n");
		machine_restart(NULL);
	}

	plldiv = G_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
	zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);

	printk("Broadcom SiByte %s %s @ %d MHz (SB1 rev %d)\n",
		    soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
	printk("Board type: %s\n", get_system_type());

	switch (war_pass) {
	case K_SYS_REVISION_BCM1250_PASS1:
#ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
		printk("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, "
		            "and the kernel doesn't have the proper "
		            "workarounds compiled in. @@@@\n");
		bad_config = 1;
#endif
		break;
	case K_SYS_REVISION_BCM1250_PASS2:
		/* Pass 2 - easiest as default for now - so many numbers */
#if !defined(CONFIG_SB1_PASS_2_WORKAROUNDS) || \
    !defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS)
		printk("@@@@ This is a BCM1250 A3-A10 board, and the "
		            "kernel doesn't have the proper workarounds "
		            "compiled in. @@@@\n");
		bad_config = 1;
#endif
#ifdef CONFIG_CPU_HAS_PREFETCH
		printk("@@@@ Prefetches may be enabled in this kernel, "
		            "but are buggy on this board.  @@@@\n");
		bad_config = 1;
#endif
		break;
	case K_SYS_REVISION_BCM1250_PASS2_2:
#ifndef CONFIG_SB1_PASS_2_WORKAROUNDS
		printk("@@@@ This is a BCM1250 B1/B2. board, and the "
		            "kernel doesn't have the proper workarounds "
		            "compiled in. @@@@\n");
		bad_config = 1;
#endif
#if defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) || \
    !defined(CONFIG_CPU_HAS_PREFETCH)
		printk("@@@@ This is a BCM1250 B1/B2, but the kernel is "
		            "conservatively configured for an 'A' stepping. "
		            "@@@@\n");
#endif
		break;
	default:
		break;
	}
	if (bad_config) {
		printk("Invalid configuration for this chip.\n");
		machine_restart(NULL);
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version 2
	7	* of the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*/
5ac71fd1	18	#include <linux/init.h>
bb9b813b	19	#include <linux/module.h>
1da177e4 LT	20	#include <linux/kernel.h>
	21	#include <linux/reboot.h>
	22	#include <linux/string.h>
	23
	24	#include <asm/bootinfo.h>
	25	#include <asm/mipsregs.h>
	26	#include <asm/io.h>
	27	#include <asm/sibyte/sb1250.h>
	28	#include <asm/sibyte/sb1250_regs.h>
	29	#include <asm/sibyte/sb1250_scd.h>
	30
	31	unsigned int sb1_pass;
	32	unsigned int soc_pass;
	33	unsigned int soc_type;
b45d5279	34	EXPORT_SYMBOL(soc_type);
1da177e4 LT	35	unsigned int periph_rev;
1da177e4 LT	36	unsigned int zbbus_mhz;
bb9b813b	37	EXPORT_SYMBOL(zbbus_mhz);
1da177e4 LT	38
	39	static char *soc_str;
	40	static char *pass_str;
	41	static unsigned int war_pass; /* XXXKW don't overload PASS defines? */
	42
5ac71fd1	43	static int __init setup_bcm1250(void)
1da177e4 LT	44	{
	45	int ret = 0;
	46
	47	switch (soc_pass) {
	48	case K_SYS_REVISION_BCM1250_PASS1:
	49	periph_rev = 1;
	50	pass_str = "Pass 1";
	51	break;
	52	case K_SYS_REVISION_BCM1250_A10:
	53	periph_rev = 2;
	54	pass_str = "A8/A10";
	55	/* XXXKW different war_pass? */
	56	war_pass = K_SYS_REVISION_BCM1250_PASS2;
	57	break;
	58	case K_SYS_REVISION_BCM1250_PASS2_2:
	59	periph_rev = 2;
	60	pass_str = "B1";
	61	break;
	62	case K_SYS_REVISION_BCM1250_B2:
	63	periph_rev = 2;
	64	pass_str = "B2";
	65	war_pass = K_SYS_REVISION_BCM1250_PASS2_2;
	66	break;
	67	case K_SYS_REVISION_BCM1250_PASS3:
	68	periph_rev = 3;
	69	pass_str = "C0";
	70	break;
	71	case K_SYS_REVISION_BCM1250_C1:
	72	periph_rev = 3;
	73	pass_str = "C1";
	74	break;
	75	default:
	76	if (soc_pass < K_SYS_REVISION_BCM1250_PASS2_2) {
	77	periph_rev = 2;
	78	pass_str = "A0-A6";
	79	war_pass = K_SYS_REVISION_BCM1250_PASS2;
	80	} else {
36a88530	81	printk("Unknown BCM1250 rev %x\n", soc_pass);
1da177e4 LT	82	ret = 1;
	83	}
	84	break;
	85	}
7c4b4773	86
1da177e4 LT	87	return ret;
	88	}
	89
8d9df29d RB	90	int sb1250_m3_workaround_needed(void)
	91	{
	92	switch (soc_type) {
	93	case K_SYS_SOC_TYPE_BCM1250:
	94	case K_SYS_SOC_TYPE_BCM1250_ALT:
	95	case K_SYS_SOC_TYPE_BCM1250_ALT2:
	96	case K_SYS_SOC_TYPE_BCM1125:
	97	case K_SYS_SOC_TYPE_BCM1125H:
	98	return soc_pass < K_SYS_REVISION_BCM1250_C0;
	99
	100	default:
	101	return 0;
	102	}
	103	}
	104
5ac71fd1	105	static int __init setup_bcm112x(void)
1da177e4 LT	106	{
	107	int ret = 0;
	108
	109	switch (soc_pass) {
	110	case 0:
	111	/* Early build didn't have revid set */
	112	periph_rev = 3;
	113	pass_str = "A1";
	114	war_pass = K_SYS_REVISION_BCM112x_A1;
	115	break;
	116	case K_SYS_REVISION_BCM112x_A1:
	117	periph_rev = 3;
	118	pass_str = "A1";
	119	break;
	120	case K_SYS_REVISION_BCM112x_A2:
	121	periph_rev = 3;
	122	pass_str = "A2";
	123	break;
9a994357 MM	124	case K_SYS_REVISION_BCM112x_A3:
	125	periph_rev = 3;
	126	pass_str = "A3";
	127	break;
	128	case K_SYS_REVISION_BCM112x_A4:
	129	periph_rev = 3;
	130	pass_str = "A4";
	131	break;
	132	case K_SYS_REVISION_BCM112x_B0:
	133	periph_rev = 3;
	134	pass_str = "B0";
	135	break;
1da177e4	136	default:
36a88530	137	printk("Unknown %s rev %x\n", soc_str, soc_pass);
1da177e4 LT	138	ret = 1;
1da177e4 LT	139	}
7c4b4773 RB	140
	141	return ret;
	142	}
	143
	144	/* Setup code likely to be common to all SiByte platforms */
	145
	146	static int __init sys_rev_decode(void)
	147	{
	148	int ret = 0;
	149
	150	war_pass = soc_pass;
	151	switch (soc_type) {
	152	case K_SYS_SOC_TYPE_BCM1250:
	153	case K_SYS_SOC_TYPE_BCM1250_ALT:
	154	case K_SYS_SOC_TYPE_BCM1250_ALT2:
	155	soc_str = "BCM1250";
	156	ret = setup_bcm1250();
	157	break;
	158	case K_SYS_SOC_TYPE_BCM1120:
	159	soc_str = "BCM1120";
	160	ret = setup_bcm112x();
	161	break;
	162	case K_SYS_SOC_TYPE_BCM1125:
	163	soc_str = "BCM1125";
	164	ret = setup_bcm112x();
	165	break;
	166	case K_SYS_SOC_TYPE_BCM1125H:
	167	soc_str = "BCM1125H";
	168	ret = setup_bcm112x();
	169	break;
	170	default:
	171	printk("Unknown SOC type %x\n", soc_type);
	172	ret = 1;
	173	break;
	174	}
	175
1da177e4 LT	176	return ret;
	177	}
	178
5ac71fd1	179	void __init sb1250_setup(void)
1da177e4 LT	180	{
	181	uint64_t sys_rev;
	182	int plldiv;
	183	int bad_config = 0;
	184
	185	sb1_pass = read_c0_prid() & 0xff;
65bda1a9	186	sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION));
1da177e4 LT	187	soc_type = SYS_SOC_TYPE(sys_rev);
	188	soc_pass = G_SYS_REVISION(sys_rev);
	189
	190	if (sys_rev_decode()) {
36a88530	191	printk("Restart after failure to identify SiByte chip\n");
1da177e4 LT	192	machine_restart(NULL);
	193	}
	194
65bda1a9	195	plldiv = G_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
1da177e4 LT	196	zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
1da177e4 LT	197
36a88530	198	printk("Broadcom SiByte %s %s @ %d MHz (SB1 rev %d)\n",
1da177e4	199	soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
36a88530	200	printk("Board type: %s\n", get_system_type());
1da177e4	201
b6f7880b	202	switch (war_pass) {
1da177e4 LT	203	case K_SYS_REVISION_BCM1250_PASS1:
1da177e4 LT	204	#ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
36a88530	205	printk("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, "
b6f7880b RB	206	"and the kernel doesn't have the proper "
b6f7880b RB	207	"workarounds compiled in. @@@@\n");
1da177e4 LT	208	bad_config = 1;
	209	#endif
	210	break;
	211	case K_SYS_REVISION_BCM1250_PASS2:
	212	/* Pass 2 - easiest as default for now - so many numbers */
b6f7880b RB	213	#if !defined(CONFIG_SB1_PASS_2_WORKAROUNDS) \|\| \
b6f7880b RB	214	!defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS)
36a88530	215	printk("@@@@ This is a BCM1250 A3-A10 board, and the "
b6f7880b RB	216	"kernel doesn't have the proper workarounds "
b6f7880b RB	217	"compiled in. @@@@\n");
1da177e4 LT	218	bad_config = 1;
	219	#endif
	220	#ifdef CONFIG_CPU_HAS_PREFETCH
36a88530	221	printk("@@@@ Prefetches may be enabled in this kernel, "
b6f7880b	222	"but are buggy on this board. @@@@\n");
1da177e4 LT	223	bad_config = 1;
	224	#endif
	225	break;
	226	case K_SYS_REVISION_BCM1250_PASS2_2:
	227	#ifndef CONFIG_SB1_PASS_2_WORKAROUNDS
36a88530	228	printk("@@@@ This is a BCM1250 B1/B2. board, and the "
b6f7880b RB	229	"kernel doesn't have the proper workarounds "
b6f7880b RB	230	"compiled in. @@@@\n");
1da177e4 LT	231	bad_config = 1;
1da177e4 LT	232	#endif
b6f7880b RB	233	#if defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) \|\| \
b6f7880b RB	234	!defined(CONFIG_CPU_HAS_PREFETCH)
36a88530	235	printk("@@@@ This is a BCM1250 B1/B2, but the kernel is "
b6f7880b RB	236	"conservatively configured for an 'A' stepping. "
b6f7880b RB	237	"@@@@\n");
1da177e4 LT	238	#endif
	239	break;
	240	default:
	241	break;
	242	}
	243	if (bad_config) {
36a88530	244	printk("Invalid configuration for this chip.\n");
1da177e4 LT	245	machine_restart(NULL);
	246	}
	247	}