[linux-2.6-block.git] / arch / arm / plat-omap / common.c

/*
 * linux/arch/arm/plat-omap/common.c
 *
 * Code common to all OMAP machines.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/console.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <linux/clk.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>
#include <asm/setup.h>

#include <mach/common.h>
#include <mach/board.h>
#include <mach/control.h>
#include <mach/mux.h>
#include <mach/fpga.h>

#include <mach/clock.h>

#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
# include "../mach-omap2/sdrc.h"
#endif

#define NO_LENGTH_CHECK 0xffffffff

unsigned char omap_bootloader_tag[512];
int omap_bootloader_tag_len;

struct omap_board_config_kernel *omap_board_config;
int omap_board_config_size;

static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
{
	struct omap_board_config_kernel *kinfo = NULL;
	int i;

#ifdef CONFIG_OMAP_BOOT_TAG
	struct omap_board_config_entry *info = NULL;

	if (omap_bootloader_tag_len > 4)
		info = (struct omap_board_config_entry *) omap_bootloader_tag;
	while (info != NULL) {
		u8 *next;

		if (info->tag == tag) {
			if (skip == 0)
				break;
			skip--;
		}

		if ((info->len & 0x03) != 0) {
			/* We bail out to avoid an alignment fault */
			printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
			       info->len, info->tag);
			return NULL;
		}
		next = (u8 *) info + sizeof(*info) + info->len;
		if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
			info = NULL;
		else
			info = (struct omap_board_config_entry *) next;
	}
	if (info != NULL) {
		/* Check the length as a lame attempt to check for
		 * binary inconsistency. */
		if (len != NO_LENGTH_CHECK) {
			/* Word-align len */
			if (len & 0x03)
				len = (len + 3) & ~0x03;
			if (info->len != len) {
				printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
				       tag, len, info->len);
				return NULL;
			}
		}
		if (len_out != NULL)
			*len_out = info->len;
		return info->data;
	}
#endif
	/* Try to find the config from the board-specific structures
	 * in the kernel. */
	for (i = 0; i < omap_board_config_size; i++) {
		if (omap_board_config[i].tag == tag) {
			if (skip == 0) {
				kinfo = &omap_board_config[i];
				break;
			} else {
				skip--;
			}
		}
	}
	if (kinfo == NULL)
		return NULL;
	return kinfo->data;
}

const void *__omap_get_config(u16 tag, size_t len, int nr)
{
        return get_config(tag, len, nr, NULL);
}
EXPORT_SYMBOL(__omap_get_config);

const void *omap_get_var_config(u16 tag, size_t *len)
{
        return get_config(tag, NO_LENGTH_CHECK, 0, len);
}
EXPORT_SYMBOL(omap_get_var_config);

static int __init omap_add_serial_console(void)
{
	const struct omap_serial_console_config *con_info;
	const struct omap_uart_config *uart_info;
	static char speed[11], *opt = NULL;
	int line, i, uart_idx;

	uart_info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
	con_info = omap_get_config(OMAP_TAG_SERIAL_CONSOLE,
					struct omap_serial_console_config);
	if (uart_info == NULL || con_info == NULL)
		return 0;

	if (con_info->console_uart == 0)
		return 0;

	if (con_info->console_speed) {
		snprintf(speed, sizeof(speed), "%u", con_info->console_speed);
		opt = speed;
	}

	uart_idx = con_info->console_uart - 1;
	if (uart_idx >= OMAP_MAX_NR_PORTS) {
		printk(KERN_INFO "Console: external UART#%d. "
			"Not adding it as console this time.\n",
			uart_idx + 1);
		return 0;
	}
	if (!(uart_info->enabled_uarts & (1 << uart_idx))) {
		printk(KERN_ERR "Console: Selected UART#%d is "
			"not enabled for this platform\n",
			uart_idx + 1);
		return -1;
	}
	line = 0;
	for (i = 0; i < uart_idx; i++) {
		if (uart_info->enabled_uarts & (1 << i))
			line++;
	}
	return add_preferred_console("ttyS", line, opt);
}
console_initcall(omap_add_serial_console);


/*
 * 32KHz clocksource ... always available, on pretty most chips except
 * OMAP 730 and 1510.  Other timers could be used as clocksources, with
 * higher resolution in free-running counter modes (e.g. 12 MHz xtal),
 * but systems won't necessarily want to spend resources that way.
 */

#if defined(CONFIG_ARCH_OMAP16XX)
#define TIMER_32K_SYNCHRONIZED		0xfffbc410
#elif defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
#define TIMER_32K_SYNCHRONIZED		(OMAP2_32KSYNCT_BASE + 0x10)
#endif

#ifdef	TIMER_32K_SYNCHRONIZED

#include <linux/clocksource.h>

static cycle_t omap_32k_read(struct clocksource *cs)
{
	return omap_readl(TIMER_32K_SYNCHRONIZED);
}

static struct clocksource clocksource_32k = {
	.name		= "32k_counter",
	.rating		= 250,
	.read		= omap_32k_read,
	.mask		= CLOCKSOURCE_MASK(32),
	.shift		= 10,
	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
};

/*
 * Returns current time from boot in nsecs. It's OK for this to wrap
 * around for now, as it's just a relative time stamp.
 */
unsigned long long sched_clock(void)
{
	unsigned long long ret;

	ret = (unsigned long long)omap_32k_read(&clocksource_32k);
	ret = (ret * clocksource_32k.mult_orig) >> clocksource_32k.shift;
	return ret;
}

static int __init omap_init_clocksource_32k(void)
{
	static char err[] __initdata = KERN_ERR
			"%s: can't register clocksource!\n";

	if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
		struct clk *sync_32k_ick;

		sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
		if (sync_32k_ick)
			clk_enable(sync_32k_ick);

		clocksource_32k.mult = clocksource_hz2mult(32768,
					    clocksource_32k.shift);

		if (clocksource_register(&clocksource_32k))
			printk(err, clocksource_32k.name);
	}
	return 0;
}
arch_initcall(omap_init_clocksource_32k);

#endif	/* TIMER_32K_SYNCHRONIZED */

/* Global address base setup code */

#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)

static struct omap_globals *omap2_globals;

static void __init __omap2_set_globals(void)
{
	omap2_set_globals_tap(omap2_globals);
	omap2_set_globals_sdrc(omap2_globals);
	omap2_set_globals_control(omap2_globals);
	omap2_set_globals_prcm(omap2_globals);
}

#endif

#if defined(CONFIG_ARCH_OMAP2420)

static struct omap_globals omap242x_globals = {
	.class	= OMAP242X_CLASS,
	.tap	= OMAP2_IO_ADDRESS(0x48014000),
	.sdrc	= OMAP2_IO_ADDRESS(OMAP2420_SDRC_BASE),
	.sms	= OMAP2_IO_ADDRESS(OMAP2420_SMS_BASE),
	.ctrl	= OMAP2_IO_ADDRESS(OMAP2420_CTRL_BASE),
	.prm	= OMAP2_IO_ADDRESS(OMAP2420_PRM_BASE),
	.cm	= OMAP2_IO_ADDRESS(OMAP2420_CM_BASE),
};

void __init omap2_set_globals_242x(void)
{
	omap2_globals = &omap242x_globals;
	__omap2_set_globals();
}
#endif

#if defined(CONFIG_ARCH_OMAP2430)

static struct omap_globals omap243x_globals = {
	.class	= OMAP243X_CLASS,
	.tap	= OMAP2_IO_ADDRESS(0x4900a000),
	.sdrc	= OMAP2_IO_ADDRESS(OMAP243X_SDRC_BASE),
	.sms	= OMAP2_IO_ADDRESS(OMAP243X_SMS_BASE),
	.ctrl	= OMAP2_IO_ADDRESS(OMAP243X_CTRL_BASE),
	.prm	= OMAP2_IO_ADDRESS(OMAP2430_PRM_BASE),
	.cm	= OMAP2_IO_ADDRESS(OMAP2430_CM_BASE),
};

void __init omap2_set_globals_243x(void)
{
	omap2_globals = &omap243x_globals;
	__omap2_set_globals();
}
#endif

#if defined(CONFIG_ARCH_OMAP3430)

static struct omap_globals omap343x_globals = {
	.class	= OMAP343X_CLASS,
	.tap	= OMAP2_IO_ADDRESS(0x4830A000),
	.sdrc	= OMAP2_IO_ADDRESS(OMAP343X_SDRC_BASE),
	.sms	= OMAP2_IO_ADDRESS(OMAP343X_SMS_BASE),
	.ctrl	= OMAP2_IO_ADDRESS(OMAP343X_CTRL_BASE),
	.prm	= OMAP2_IO_ADDRESS(OMAP3430_PRM_BASE),
	.cm	= OMAP2_IO_ADDRESS(OMAP3430_CM_BASE),
};

void __init omap2_set_globals_343x(void)
{
	omap2_globals = &omap343x_globals;
	__omap2_set_globals();
}
#endif
Commit	Line	Data
5e1c5ff4 TL	1	/*
	2	* linux/arch/arm/plat-omap/common.c
	3	*
	4	* Code common to all OMAP machines.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
5e1c5ff4 TL	10	#include <linux/module.h>
	11	#include <linux/kernel.h>
	12	#include <linux/init.h>
	13	#include <linux/delay.h>
	14	#include <linux/pm.h>
	15	#include <linux/console.h>
	16	#include <linux/serial.h>
	17	#include <linux/tty.h>
	18	#include <linux/serial_8250.h>
	19	#include <linux/serial_reg.h>
f8ce2547	20	#include <linux/clk.h>
fced80c7	21	#include <linux/io.h>
5e1c5ff4	22
a09e64fb	23	#include <mach/hardware.h>
5e1c5ff4 TL	24	#include <asm/system.h>
	25	#include <asm/pgtable.h>
	26	#include <asm/mach/map.h>
92105bb7	27	#include <asm/setup.h>
5e1c5ff4	28
a09e64fb RK	29	#include <mach/common.h>
	30	#include <mach/board.h>
	31	#include <mach/control.h>
	32	#include <mach/mux.h>
	33	#include <mach/fpga.h>
5e1c5ff4	34
a09e64fb	35	#include <mach/clock.h>
5e1c5ff4	36
44595982 PW	37	#if defined(CONFIG_ARCH_OMAP2) \|\| defined(CONFIG_ARCH_OMAP3)
	38	# include "../mach-omap2/sdrc.h"
	39	#endif
	40
5e1c5ff4 TL	41	#define NO_LENGTH_CHECK 0xffffffff
5e1c5ff4 TL	42
92105bb7 TL	43	unsigned char omap_bootloader_tag[512];
92105bb7 TL	44	int omap_bootloader_tag_len;
5e1c5ff4 TL	45
5e1c5ff4 TL	46	struct omap_board_config_kernel *omap_board_config;
92105bb7	47	int omap_board_config_size;
5e1c5ff4 TL	48
	49	static const void get_config(u16 tag, size_t len, int skip, size_t len_out)
	50	{
	51	struct omap_board_config_kernel *kinfo = NULL;
	52	int i;
	53
	54	#ifdef CONFIG_OMAP_BOOT_TAG
	55	struct omap_board_config_entry *info = NULL;
	56
	57	if (omap_bootloader_tag_len > 4)
	58	info = (struct omap_board_config_entry *) omap_bootloader_tag;
	59	while (info != NULL) {
	60	u8 *next;
	61
	62	if (info->tag == tag) {
	63	if (skip == 0)
	64	break;
	65	skip--;
	66	}
	67
	68	if ((info->len & 0x03) != 0) {
	69	/* We bail out to avoid an alignment fault */
	70	printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
	71	info->len, info->tag);
	72	return NULL;
	73	}
	74	next = (u8 ) info + sizeof(info) + info->len;
	75	if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
	76	info = NULL;
	77	else
	78	info = (struct omap_board_config_entry *) next;
	79	}
	80	if (info != NULL) {
	81	/* Check the length as a lame attempt to check for
6cbdc8c5	82	* binary inconsistency. */
5e1c5ff4 TL	83	if (len != NO_LENGTH_CHECK) {
	84	/* Word-align len */
	85	if (len & 0x03)
	86	len = (len + 3) & ~0x03;
	87	if (info->len != len) {
	88	printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
	89	tag, len, info->len);
	90	return NULL;
	91	}
	92	}
	93	if (len_out != NULL)
	94	*len_out = info->len;
	95	return info->data;
	96	}
	97	#endif
	98	/* Try to find the config from the board-specific structures
	99	* in the kernel. */
	100	for (i = 0; i < omap_board_config_size; i++) {
	101	if (omap_board_config[i].tag == tag) {
c40fae95 TL	102	if (skip == 0) {
	103	kinfo = &omap_board_config[i];
	104	break;
	105	} else {
	106	skip--;
	107	}
5e1c5ff4 TL	108	}
	109	}
	110	if (kinfo == NULL)
	111	return NULL;
	112	return kinfo->data;
	113	}
	114
	115	const void *__omap_get_config(u16 tag, size_t len, int nr)
	116	{
	117	return get_config(tag, len, nr, NULL);
	118	}
	119	EXPORT_SYMBOL(__omap_get_config);
	120
	121	const void omap_get_var_config(u16 tag, size_t len)
	122	{
	123	return get_config(tag, NO_LENGTH_CHECK, 0, len);
	124	}
	125	EXPORT_SYMBOL(omap_get_var_config);
	126
	127	static int __init omap_add_serial_console(void)
	128	{
1a8bfa1e TL	129	const struct omap_serial_console_config *con_info;
	130	const struct omap_uart_config *uart_info;
	131	static char speed[11], *opt = NULL;
	132	int line, i, uart_idx;
	133
	134	uart_info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
	135	con_info = omap_get_config(OMAP_TAG_SERIAL_CONSOLE,
	136	struct omap_serial_console_config);
	137	if (uart_info == NULL \|\| con_info == NULL)
	138	return 0;
	139
	140	if (con_info->console_uart == 0)
	141	return 0;
	142
	143	if (con_info->console_speed) {
	144	snprintf(speed, sizeof(speed), "%u", con_info->console_speed);
	145	opt = speed;
	146	}
5e1c5ff4	147
1a8bfa1e TL	148	uart_idx = con_info->console_uart - 1;
	149	if (uart_idx >= OMAP_MAX_NR_PORTS) {
	150	printk(KERN_INFO "Console: external UART#%d. "
	151	"Not adding it as console this time.\n",
	152	uart_idx + 1);
	153	return 0;
	154	}
	155	if (!(uart_info->enabled_uarts & (1 << uart_idx))) {
	156	printk(KERN_ERR "Console: Selected UART#%d is "
	157	"not enabled for this platform\n",
	158	uart_idx + 1);
	159	return -1;
	160	}
	161	line = 0;
	162	for (i = 0; i < uart_idx; i++) {
	163	if (uart_info->enabled_uarts & (1 << i))
	164	line++;
5e1c5ff4	165	}
1a8bfa1e	166	return add_preferred_console("ttyS", line, opt);
5e1c5ff4 TL	167	}
5e1c5ff4 TL	168	console_initcall(omap_add_serial_console);
075192ae KH	169
	170
	171	/*
	172	* 32KHz clocksource ... always available, on pretty most chips except
	173	* OMAP 730 and 1510. Other timers could be used as clocksources, with
	174	* higher resolution in free-running counter modes (e.g. 12 MHz xtal),
	175	* but systems won't necessarily want to spend resources that way.
	176	*/
	177
	178	#if defined(CONFIG_ARCH_OMAP16XX)
	179	#define TIMER_32K_SYNCHRONIZED 0xfffbc410
44595982 PW	180	#elif defined(CONFIG_ARCH_OMAP24XX) \|\| defined(CONFIG_ARCH_OMAP34XX)
44595982 PW	181	#define TIMER_32K_SYNCHRONIZED (OMAP2_32KSYNCT_BASE + 0x10)
075192ae KH	182	#endif
	183
	184	#ifdef TIMER_32K_SYNCHRONIZED
	185
	186	#include <linux/clocksource.h>
	187
8e19608e	188	static cycle_t omap_32k_read(struct clocksource *cs)
075192ae KH	189	{
	190	return omap_readl(TIMER_32K_SYNCHRONIZED);
	191	}
	192
	193	static struct clocksource clocksource_32k = {
	194	.name = "32k_counter",
	195	.rating = 250,
	196	.read = omap_32k_read,
	197	.mask = CLOCKSOURCE_MASK(32),
	198	.shift = 10,
	199	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
	200	};
	201
f258b0c6 KH	202	/*
	203	* Returns current time from boot in nsecs. It's OK for this to wrap
	204	* around for now, as it's just a relative time stamp.
	205	*/
	206	unsigned long long sched_clock(void)
	207	{
80ea3bac AK	208	unsigned long long ret;
80ea3bac AK	209
8e19608e	210	ret = (unsigned long long)omap_32k_read(&clocksource_32k);
80ea3bac AK	211	ret = (ret * clocksource_32k.mult_orig) >> clocksource_32k.shift;
80ea3bac AK	212	return ret;
f258b0c6 KH	213	}
f258b0c6 KH	214
075192ae KH	215	static int __init omap_init_clocksource_32k(void)
	216	{
	217	static char err[] __initdata = KERN_ERR
	218	"%s: can't register clocksource!\n";
	219
44595982 PW	220	if (cpu_is_omap16xx() \|\| cpu_class_is_omap2()) {
	221	struct clk *sync_32k_ick;
	222
	223	sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
	224	if (sync_32k_ick)
	225	clk_enable(sync_32k_ick);
	226
075192ae KH	227	clocksource_32k.mult = clocksource_hz2mult(32768,
	228	clocksource_32k.shift);
	229
	230	if (clocksource_register(&clocksource_32k))
	231	printk(err, clocksource_32k.name);
	232	}
	233	return 0;
	234	}
	235	arch_initcall(omap_init_clocksource_32k);
	236
	237	#endif /* TIMER_32K_SYNCHRONIZED */
44595982 PW	238
	239	/* Global address base setup code */
	240
a58caad1 TL	241	#if defined(CONFIG_ARCH_OMAP2) \|\| defined(CONFIG_ARCH_OMAP3)
	242
	243	static struct omap_globals *omap2_globals;
	244
	245	static void __init __omap2_set_globals(void)
	246	{
0e564848	247	omap2_set_globals_tap(omap2_globals);
f2ab9977	248	omap2_set_globals_sdrc(omap2_globals);
a58caad1 TL	249	omap2_set_globals_control(omap2_globals);
	250	omap2_set_globals_prcm(omap2_globals);
	251	}
	252
	253	#endif
	254
44595982	255	#if defined(CONFIG_ARCH_OMAP2420)
a58caad1 TL	256
a58caad1 TL	257	static struct omap_globals omap242x_globals = {
0e564848	258	.class = OMAP242X_CLASS,
e8a91c95 RK	259	.tap = OMAP2_IO_ADDRESS(0x48014000),
	260	.sdrc = OMAP2_IO_ADDRESS(OMAP2420_SDRC_BASE),
	261	.sms = OMAP2_IO_ADDRESS(OMAP2420_SMS_BASE),
	262	.ctrl = OMAP2_IO_ADDRESS(OMAP2420_CTRL_BASE),
	263	.prm = OMAP2_IO_ADDRESS(OMAP2420_PRM_BASE),
	264	.cm = OMAP2_IO_ADDRESS(OMAP2420_CM_BASE),
a58caad1 TL	265	};
a58caad1 TL	266
44595982 PW	267	void __init omap2_set_globals_242x(void)
44595982 PW	268	{
a58caad1 TL	269	omap2_globals = &omap242x_globals;
a58caad1 TL	270	__omap2_set_globals();
44595982 PW	271	}
	272	#endif
	273
	274	#if defined(CONFIG_ARCH_OMAP2430)
a58caad1 TL	275
a58caad1 TL	276	static struct omap_globals omap243x_globals = {
0e564848	277	.class = OMAP243X_CLASS,
e8a91c95 RK	278	.tap = OMAP2_IO_ADDRESS(0x4900a000),
	279	.sdrc = OMAP2_IO_ADDRESS(OMAP243X_SDRC_BASE),
	280	.sms = OMAP2_IO_ADDRESS(OMAP243X_SMS_BASE),
	281	.ctrl = OMAP2_IO_ADDRESS(OMAP243X_CTRL_BASE),
	282	.prm = OMAP2_IO_ADDRESS(OMAP2430_PRM_BASE),
	283	.cm = OMAP2_IO_ADDRESS(OMAP2430_CM_BASE),
a58caad1 TL	284	};
a58caad1 TL	285
44595982 PW	286	void __init omap2_set_globals_243x(void)
44595982 PW	287	{
a58caad1 TL	288	omap2_globals = &omap243x_globals;
a58caad1 TL	289	__omap2_set_globals();
44595982 PW	290	}
	291	#endif
	292
	293	#if defined(CONFIG_ARCH_OMAP3430)
a58caad1 TL	294
a58caad1 TL	295	static struct omap_globals omap343x_globals = {
0e564848	296	.class = OMAP343X_CLASS,
e8a91c95 RK	297	.tap = OMAP2_IO_ADDRESS(0x4830A000),
	298	.sdrc = OMAP2_IO_ADDRESS(OMAP343X_SDRC_BASE),
	299	.sms = OMAP2_IO_ADDRESS(OMAP343X_SMS_BASE),
	300	.ctrl = OMAP2_IO_ADDRESS(OMAP343X_CTRL_BASE),
	301	.prm = OMAP2_IO_ADDRESS(OMAP3430_PRM_BASE),
	302	.cm = OMAP2_IO_ADDRESS(OMAP3430_CM_BASE),
a58caad1 TL	303	};
a58caad1 TL	304
44595982 PW	305	void __init omap2_set_globals_343x(void)
44595982 PW	306	{
a58caad1 TL	307	omap2_globals = &omap343x_globals;
a58caad1 TL	308	__omap2_set_globals();
44595982 PW	309	}
	310	#endif
	311