[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / platforms / maple / setup.c

/*
 *  Maple (970 eval board) setup code
 *
 *  (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
 *                     IBM Corp. 
 *
 *  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.
 *
 */

#undef DEBUG

#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <linux/ide.h>
#include <linux/pci.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/smp.h>

#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/kexec.h>
#include <asm/pci-bridge.h>
#include <asm/iommu.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/cputable.h>
#include <asm/time.h>
#include <asm/of_device.h>
#include <asm/lmb.h>
#include <asm/mpic.h>
#include <asm/udbg.h>

#include "maple.h"

#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif

static unsigned long maple_find_nvram_base(void)
{
	struct device_node *rtcs;
	unsigned long result = 0;

	/* find NVRAM device */
	rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
	if (rtcs) {
		struct resource r;
		if (of_address_to_resource(rtcs, 0, &r)) {
			printk(KERN_EMERG "Maple: Unable to translate NVRAM"
			       " address\n");
			goto bail;
		}
		if (!(r.flags & IORESOURCE_IO)) {
			printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
			goto bail;
		}
		result = r.start;
	} else
		printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
 bail:
	of_node_put(rtcs);
	return result;
}

static void maple_restart(char *cmd)
{
	unsigned int maple_nvram_base;
	unsigned int maple_nvram_offset;
	unsigned int maple_nvram_command;
	struct device_node *sp;

	maple_nvram_base = maple_find_nvram_base();
	if (maple_nvram_base == 0)
		goto fail;

	/* find service processor device */
	sp = of_find_node_by_name(NULL, "service-processor");
	if (!sp) {
		printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
		goto fail;
	}
	maple_nvram_offset = *(unsigned int*) get_property(sp,
			"restart-addr", NULL);
	maple_nvram_command = *(unsigned int*) get_property(sp,
			"restart-value", NULL);
	of_node_put(sp);

	/* send command */
	outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
	for (;;) ;
 fail:
	printk(KERN_EMERG "Maple: Manual Restart Required\n");
}

static void maple_power_off(void)
{
	unsigned int maple_nvram_base;
	unsigned int maple_nvram_offset;
	unsigned int maple_nvram_command;
	struct device_node *sp;

	maple_nvram_base = maple_find_nvram_base();
	if (maple_nvram_base == 0)
		goto fail;

	/* find service processor device */
	sp = of_find_node_by_name(NULL, "service-processor");
	if (!sp) {
		printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
		goto fail;
	}
	maple_nvram_offset = *(unsigned int*) get_property(sp,
			"power-off-addr", NULL);
	maple_nvram_command = *(unsigned int*) get_property(sp,
			"power-off-value", NULL);
	of_node_put(sp);

	/* send command */
	outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
	for (;;) ;
 fail:
	printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
}

static void maple_halt(void)
{
	maple_power_off();
}

#ifdef CONFIG_SMP
struct smp_ops_t maple_smp_ops = {
	.probe		= smp_mpic_probe,
	.message_pass	= smp_mpic_message_pass,
	.kick_cpu	= smp_generic_kick_cpu,
	.setup_cpu	= smp_mpic_setup_cpu,
	.give_timebase	= smp_generic_give_timebase,
	.take_timebase	= smp_generic_take_timebase,
};
#endif /* CONFIG_SMP */

void __init maple_setup_arch(void)
{
	/* init to some ~sane value until calibrate_delay() runs */
	loops_per_jiffy = 50000000;

	/* Setup SMP callback */
#ifdef CONFIG_SMP
	smp_ops = &maple_smp_ops;
#endif
	/* Lookup PCI hosts */
       	maple_pci_init();

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif

	printk(KERN_DEBUG "Using native/NAP idle loop\n");
}

/* 
 * Early initialization.
 */
static void __init maple_init_early(void)
{
	DBG(" -> maple_init_early\n");

	iommu_init_early_dart();

	DBG(" <- maple_init_early\n");
}

/*
 * This is almost identical to pSeries and CHRP. We need to make that
 * code generic at one point, with appropriate bits in the device-tree to
 * identify the presence of an HT APIC
 */
static void __init maple_init_IRQ(void)
{
	struct device_node *root, *np, *mpic_node = NULL;
	unsigned int *opprop;
	unsigned long openpic_addr = 0;
	int naddr, n, i, opplen, has_isus = 0;
	struct mpic *mpic;
	unsigned int flags = MPIC_PRIMARY;

	/* Locate MPIC in the device-tree. Note that there is a bug
	 * in Maple device-tree where the type of the controller is
	 * open-pic and not interrupt-controller
	 */
	for_each_node_by_type(np, "open-pic") {
		mpic_node = np;
		break;
	}
	if (mpic_node == NULL) {
		printk(KERN_ERR
		       "Failed to locate the MPIC interrupt controller\n");
		return;
	}

	/* Find address list in /platform-open-pic */
	root = of_find_node_by_path("/");
	naddr = prom_n_addr_cells(root);
	opprop = (unsigned int *) get_property(root, "platform-open-pic",
					       &opplen);
	if (opprop != 0) {
		openpic_addr = of_read_number(opprop, naddr);
		has_isus = (opplen > naddr);
		printk(KERN_DEBUG "OpenPIC addr: %lx, has ISUs: %d\n",
		       openpic_addr, has_isus);
	}
	of_node_put(root);

	BUG_ON(openpic_addr == 0);

	/* Check for a big endian MPIC */
	if (get_property(np, "big-endian", NULL) != NULL)
		flags |= MPIC_BIG_ENDIAN;

	/* XXX Maple specific bits */
	flags |= MPIC_BROKEN_U3 | MPIC_WANTS_RESET;

	/* Setup the openpic driver. More device-tree junks, we hard code no
	 * ISUs for now. I'll have to revisit some stuffs with the folks doing
	 * the firmware for those
	 */
	mpic = mpic_alloc(mpic_node, openpic_addr, flags,
			  /*has_isus ? 16 :*/ 0, 0, " MPIC     ");
	BUG_ON(mpic == NULL);

	/* Add ISUs */
	opplen /= sizeof(u32);
	for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
		unsigned long isuaddr = of_read_number(opprop + i, naddr);
		mpic_assign_isu(mpic, n, isuaddr);
	}

	/* All ISUs are setup, complete initialization */
	mpic_init(mpic);
	ppc_md.get_irq = mpic_get_irq;
	of_node_put(mpic_node);
	of_node_put(root);
}

static void __init maple_progress(char *s, unsigned short hex)
{
	printk("*** %04x : %s\n", hex, s ? s : "");
}


/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init maple_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	if (!of_flat_dt_is_compatible(root, "Momentum,Maple") &&
	    !of_flat_dt_is_compatible(root, "Momentum,Apache"))
		return 0;
	/*
	 * On U3, the DART (iommu) must be allocated now since it
	 * has an impact on htab_initialize (due to the large page it
	 * occupies having to be broken up so the DART itself is not
	 * part of the cacheable linar mapping
	 */
	alloc_dart_table();

	hpte_init_native();

	return 1;
}

define_machine(maple_md) {
	.name			= "Maple",
	.probe			= maple_probe,
	.setup_arch		= maple_setup_arch,
	.init_early		= maple_init_early,
	.init_IRQ		= maple_init_IRQ,
	.pcibios_fixup		= maple_pcibios_fixup,
	.pci_get_legacy_ide_irq	= maple_pci_get_legacy_ide_irq,
	.restart		= maple_restart,
	.power_off		= maple_power_off,
	.halt			= maple_halt,
       	.get_boot_time		= maple_get_boot_time,
       	.set_rtc_time		= maple_set_rtc_time,
       	.get_rtc_time		= maple_get_rtc_time,
      	.calibrate_decr		= generic_calibrate_decr,
	.progress		= maple_progress,
	.power_save		= power4_idle,
#ifdef CONFIG_KEXEC
	.machine_kexec		= default_machine_kexec,
	.machine_kexec_prepare	= default_machine_kexec_prepare,
	.machine_crash_shutdown	= default_machine_crash_shutdown,
#endif
};
Commit	Line	Data
1da177e4	1	/*
0cb7b2af	2	* Maple (970 eval board) setup code
1da177e4 LT	3	*
	4	* (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
	5	* IBM Corp.
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version
	10	* 2 of the License, or (at your option) any later version.
	11	*
	12	*/
	13
980a6513	14	#undef DEBUG
1da177e4	15
1da177e4 LT	16	#include <linux/init.h>
	17	#include <linux/errno.h>
	18	#include <linux/sched.h>
	19	#include <linux/kernel.h>
	20	#include <linux/mm.h>
	21	#include <linux/stddef.h>
	22	#include <linux/unistd.h>
	23	#include <linux/ptrace.h>
	24	#include <linux/slab.h>
	25	#include <linux/user.h>
	26	#include <linux/a.out.h>
	27	#include <linux/tty.h>
	28	#include <linux/string.h>
	29	#include <linux/delay.h>
	30	#include <linux/ioport.h>
	31	#include <linux/major.h>
	32	#include <linux/initrd.h>
	33	#include <linux/vt_kern.h>
	34	#include <linux/console.h>
	35	#include <linux/ide.h>
	36	#include <linux/pci.h>
	37	#include <linux/adb.h>
	38	#include <linux/cuda.h>
	39	#include <linux/pmu.h>
	40	#include <linux/irq.h>
	41	#include <linux/seq_file.h>
	42	#include <linux/root_dev.h>
	43	#include <linux/serial.h>
	44	#include <linux/smp.h>
	45
	46	#include <asm/processor.h>
	47	#include <asm/sections.h>
	48	#include <asm/prom.h>
	49	#include <asm/system.h>
	50	#include <asm/pgtable.h>
	51	#include <asm/bitops.h>
	52	#include <asm/io.h>
3d1229d6	53	#include <asm/kexec.h>
1da177e4 LT	54	#include <asm/pci-bridge.h>
	55	#include <asm/iommu.h>
	56	#include <asm/machdep.h>
	57	#include <asm/dma.h>
	58	#include <asm/cputable.h>
	59	#include <asm/time.h>
	60	#include <asm/of_device.h>
	61	#include <asm/lmb.h>
bbeb3f4c	62	#include <asm/mpic.h>
40ef8cbc	63	#include <asm/udbg.h>
1da177e4	64
0cb7b2af PM	65	#include "maple.h"
0cb7b2af PM	66
1da177e4 LT	67	#ifdef DEBUG
	68	#define DBG(fmt...) udbg_printf(fmt)
	69	#else
	70	#define DBG(fmt...)
	71	#endif
	72
4c882b01 BH	73	static unsigned long maple_find_nvram_base(void)
	74	{
	75	struct device_node *rtcs;
	76	unsigned long result = 0;
	77
	78	/* find NVRAM device */
	79	rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
	80	if (rtcs) {
	81	struct resource r;
	82	if (of_address_to_resource(rtcs, 0, &r)) {
	83	printk(KERN_EMERG "Maple: Unable to translate NVRAM"
	84	" address\n");
	85	goto bail;
	86	}
	87	if (!(r.flags & IORESOURCE_IO)) {
	88	printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
	89	goto bail;
	90	}
	91	result = r.start;
	92	} else
	93	printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
	94	bail:
	95	of_node_put(rtcs);
	96	return result;
	97	}
	98
1da177e4 LT	99	static void maple_restart(char *cmd)
1da177e4 LT	100	{
d7152fe1 DG	101	unsigned int maple_nvram_base;
	102	unsigned int maple_nvram_offset;
	103	unsigned int maple_nvram_command;
4c882b01	104	struct device_node *sp;
d7152fe1	105
4c882b01 BH	106	maple_nvram_base = maple_find_nvram_base();
	107	if (maple_nvram_base == 0)
	108	goto fail;
d7152fe1 DG	109
d7152fe1 DG	110	/* find service processor device */
4c882b01 BH	111	sp = of_find_node_by_name(NULL, "service-processor");
4c882b01 BH	112	if (!sp) {
d7152fe1	113	printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
4c882b01	114	goto fail;
d7152fe1	115	}
4c882b01	116	maple_nvram_offset = (unsigned int) get_property(sp,
d7152fe1	117	"restart-addr", NULL);
4c882b01	118	maple_nvram_command = (unsigned int) get_property(sp,
d7152fe1	119	"restart-value", NULL);
4c882b01	120	of_node_put(sp);
d7152fe1 DG	121
	122	/* send command */
	123	outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
	124	for (;;) ;
4c882b01 BH	125	fail:
4c882b01 BH	126	printk(KERN_EMERG "Maple: Manual Restart Required\n");
1da177e4 LT	127	}
	128
	129	static void maple_power_off(void)
	130	{
d7152fe1 DG	131	unsigned int maple_nvram_base;
	132	unsigned int maple_nvram_offset;
	133	unsigned int maple_nvram_command;
4c882b01	134	struct device_node *sp;
d7152fe1	135
4c882b01 BH	136	maple_nvram_base = maple_find_nvram_base();
	137	if (maple_nvram_base == 0)
	138	goto fail;
d7152fe1 DG	139
d7152fe1 DG	140	/* find service processor device */
4c882b01 BH	141	sp = of_find_node_by_name(NULL, "service-processor");
4c882b01 BH	142	if (!sp) {
d7152fe1	143	printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
4c882b01	144	goto fail;
d7152fe1	145	}
4c882b01	146	maple_nvram_offset = (unsigned int) get_property(sp,
d7152fe1	147	"power-off-addr", NULL);
4c882b01	148	maple_nvram_command = (unsigned int) get_property(sp,
d7152fe1	149	"power-off-value", NULL);
4c882b01	150	of_node_put(sp);
d7152fe1 DG	151
	152	/* send command */
	153	outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
	154	for (;;) ;
4c882b01 BH	155	fail:
4c882b01 BH	156	printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
1da177e4 LT	157	}
	158
	159	static void maple_halt(void)
	160	{
d7152fe1	161	maple_power_off();
1da177e4 LT	162	}
	163
	164	#ifdef CONFIG_SMP
	165	struct smp_ops_t maple_smp_ops = {
	166	.probe = smp_mpic_probe,
	167	.message_pass = smp_mpic_message_pass,
	168	.kick_cpu = smp_generic_kick_cpu,
	169	.setup_cpu = smp_mpic_setup_cpu,
	170	.give_timebase = smp_generic_give_timebase,
	171	.take_timebase = smp_generic_take_timebase,
	172	};
	173	#endif /* CONFIG_SMP */
	174
	175	void __init maple_setup_arch(void)
	176	{
	177	/* init to some ~sane value until calibrate_delay() runs */
	178	loops_per_jiffy = 50000000;
	179
	180	/* Setup SMP callback */
	181	#ifdef CONFIG_SMP
	182	smp_ops = &maple_smp_ops;
	183	#endif
	184	/* Lookup PCI hosts */
	185	maple_pci_init();
	186
	187	#ifdef CONFIG_DUMMY_CONSOLE
	188	conswitchp = &dummy_con;
	189	#endif
62d60e9f	190
4baaf0cf	191	printk(KERN_DEBUG "Using native/NAP idle loop\n");
1da177e4 LT	192	}
	193
	194	/*
	195	* Early initialization.
	196	*/
	197	static void __init maple_init_early(void)
	198	{
1da177e4 LT	199	DBG(" -> maple_init_early\n");
1da177e4 LT	200
1beb6a7d	201	iommu_init_early_dart();
1da177e4 LT	202
	203	DBG(" <- maple_init_early\n");
	204	}
	205
0ebfff14 BH	206	/*
	207	* This is almost identical to pSeries and CHRP. We need to make that
	208	* code generic at one point, with appropriate bits in the device-tree to
	209	* identify the presence of an HT APIC
	210	*/
	211	static void __init maple_init_IRQ(void)
1da177e4	212	{
0ebfff14	213	struct device_node root, np, *mpic_node = NULL;
1da177e4	214	unsigned int *opprop;
0ebfff14 BH	215	unsigned long openpic_addr = 0;
0ebfff14 BH	216	int naddr, n, i, opplen, has_isus = 0;
1da177e4	217	struct mpic *mpic;
0ebfff14	218	unsigned int flags = MPIC_PRIMARY;
1da177e4	219
0ebfff14 BH	220	/* Locate MPIC in the device-tree. Note that there is a bug
	221	* in Maple device-tree where the type of the controller is
	222	* open-pic and not interrupt-controller
	223	*/
	224	for_each_node_by_type(np, "open-pic") {
	225	mpic_node = np;
	226	break;
	227	}
	228	if (mpic_node == NULL) {
	229	printk(KERN_ERR
	230	"Failed to locate the MPIC interrupt controller\n");
	231	return;
	232	}
1da177e4	233
0ebfff14	234	/* Find address list in /platform-open-pic */
1da177e4	235	root = of_find_node_by_path("/");
0ebfff14 BH	236	naddr = prom_n_addr_cells(root);
	237	opprop = (unsigned int *) get_property(root, "platform-open-pic",
	238	&opplen);
	239	if (opprop != 0) {
	240	openpic_addr = of_read_number(opprop, naddr);
	241	has_isus = (opplen > naddr);
	242	printk(KERN_DEBUG "OpenPIC addr: %lx, has ISUs: %d\n",
	243	openpic_addr, has_isus);
	244	}
1da177e4 LT	245	of_node_put(root);
1da177e4 LT	246
0ebfff14	247	BUG_ON(openpic_addr == 0);
1da177e4	248
0ebfff14 BH	249	/* Check for a big endian MPIC */
	250	if (get_property(np, "big-endian", NULL) != NULL)
	251	flags \|= MPIC_BIG_ENDIAN;
	252
	253	/* XXX Maple specific bits */
	254	flags \|= MPIC_BROKEN_U3 \| MPIC_WANTS_RESET;
	255
	256	/* Setup the openpic driver. More device-tree junks, we hard code no
	257	* ISUs for now. I'll have to revisit some stuffs with the folks doing
	258	* the firmware for those
	259	*/
	260	mpic = mpic_alloc(mpic_node, openpic_addr, flags,
	261	/has_isus ? 16 :/ 0, 0, " MPIC ");
1da177e4	262	BUG_ON(mpic == NULL);
1da177e4	263
0ebfff14 BH	264	/* Add ISUs */
	265	opplen /= sizeof(u32);
	266	for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
	267	unsigned long isuaddr = of_read_number(opprop + i, naddr);
	268	mpic_assign_isu(mpic, n, isuaddr);
	269	}
	270
	271	/* All ISUs are setup, complete initialization */
	272	mpic_init(mpic);
	273	ppc_md.get_irq = mpic_get_irq;
	274	of_node_put(mpic_node);
	275	of_node_put(root);
1da177e4 LT	276	}
	277
	278	static void __init maple_progress(char *s, unsigned short hex)
	279	{
	280	printk("*** %04x : %s\n", hex, s ? s : "");
	281	}
	282
	283
	284	/*
	285	* Called very early, MMU is off, device-tree isn't unflattened
	286	*/
e8222502	287	static int __init maple_probe(void)
1da177e4	288	{
e8222502	289	unsigned long root = of_get_flat_dt_root();
980a6513 BH	290
	291	if (!of_flat_dt_is_compatible(root, "Momentum,Maple") &&
	292	!of_flat_dt_is_compatible(root, "Momentum,Apache"))
1da177e4 LT	293	return 0;
	294	/*
	295	* On U3, the DART (iommu) must be allocated now since it
	296	* has an impact on htab_initialize (due to the large page it
	297	* occupies having to be broken up so the DART itself is not
	298	* part of the cacheable linar mapping
	299	*/
1beb6a7d	300	alloc_dart_table();
1da177e4	301
7d0daae4 ME	302	hpte_init_native();
7d0daae4 ME	303
1da177e4 LT	304	return 1;
	305	}
	306
e8222502 BH	307	define_machine(maple_md) {
e8222502 BH	308	.name = "Maple",
1da177e4 LT	309	.probe = maple_probe,
	310	.setup_arch = maple_setup_arch,
	311	.init_early = maple_init_early,
	312	.init_IRQ = maple_init_IRQ,
1da177e4 LT	313	.pcibios_fixup = maple_pcibios_fixup,
	314	.pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
	315	.restart = maple_restart,
	316	.power_off = maple_power_off,
	317	.halt = maple_halt,
	318	.get_boot_time = maple_get_boot_time,
	319	.set_rtc_time = maple_set_rtc_time,
	320	.get_rtc_time = maple_get_rtc_time,
10f7e7c1	321	.calibrate_decr = generic_calibrate_decr,
1da177e4	322	.progress = maple_progress,
a0652fc9	323	.power_save = power4_idle,
3d1229d6 ME	324	#ifdef CONFIG_KEXEC
	325	.machine_kexec = default_machine_kexec,
	326	.machine_kexec_prepare = default_machine_kexec_prepare,
cc532915	327	.machine_crash_shutdown = default_machine_crash_shutdown,
3d1229d6	328	#endif
1da177e4	329	};