79e44c952c
Remove left over code for parsing omap boot tags. This is no longer used. see commit fc0ef1bfa1353e048e055374a09c75320d22231b Signed-off-by: Roger Quadros <ext-roger.quadros@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
296 lines
7.2 KiB
C
296 lines
7.2 KiB
C
/*
|
|
* linux/arch/arm/plat-omap/common.c
|
|
*
|
|
* Code common to all OMAP machines.
|
|
* The file is created by Tony Lindgren <tony@atomide.com>
|
|
*
|
|
* Copyright (C) 2009 Texas Instruments
|
|
* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
|
|
*
|
|
* 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/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;
|
|
|
|
/* 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);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410
|
|
|
|
#if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX))
|
|
|
|
#include <linux/clocksource.h>
|
|
|
|
#ifdef CONFIG_ARCH_OMAP16XX
|
|
static cycle_t omap16xx_32k_read(struct clocksource *cs)
|
|
{
|
|
return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED);
|
|
}
|
|
#else
|
|
#define omap16xx_32k_read NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_OMAP2420
|
|
static cycle_t omap2420_32k_read(struct clocksource *cs)
|
|
{
|
|
return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10);
|
|
}
|
|
#else
|
|
#define omap2420_32k_read NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_OMAP2430
|
|
static cycle_t omap2430_32k_read(struct clocksource *cs)
|
|
{
|
|
return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10);
|
|
}
|
|
#else
|
|
#define omap2430_32k_read NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_OMAP34XX
|
|
static cycle_t omap34xx_32k_read(struct clocksource *cs)
|
|
{
|
|
return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10);
|
|
}
|
|
#else
|
|
#define omap34xx_32k_read NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_OMAP4
|
|
static cycle_t omap44xx_32k_read(struct clocksource *cs)
|
|
{
|
|
return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10);
|
|
}
|
|
#else
|
|
#define omap44xx_32k_read NULL
|
|
#endif
|
|
|
|
/*
|
|
* Kernel assumes that sched_clock can be called early but may not have
|
|
* things ready yet.
|
|
*/
|
|
static cycle_t omap_32k_read_dummy(struct clocksource *cs)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct clocksource clocksource_32k = {
|
|
.name = "32k_counter",
|
|
.rating = 250,
|
|
.read = omap_32k_read_dummy,
|
|
.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)clocksource_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;
|
|
|
|
if (cpu_is_omap16xx())
|
|
clocksource_32k.read = omap16xx_32k_read;
|
|
else if (cpu_is_omap2420())
|
|
clocksource_32k.read = omap2420_32k_read;
|
|
else if (cpu_is_omap2430())
|
|
clocksource_32k.read = omap2430_32k_read;
|
|
else if (cpu_is_omap34xx())
|
|
clocksource_32k.read = omap34xx_32k_read;
|
|
else if (cpu_is_omap44xx())
|
|
clocksource_32k.read = omap44xx_32k_read;
|
|
else
|
|
return -ENODEV;
|
|
|
|
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 /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */
|
|
|
|
/* Global address base setup code */
|
|
|
|
#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
|
|
|
|
static void __init __omap2_set_globals(struct omap_globals *omap2_globals)
|
|
{
|
|
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_set_globals(&omap242x_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_set_globals(&omap243x_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_set_globals(&omap343x_globals);
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_ARCH_OMAP4)
|
|
static struct omap_globals omap4_globals = {
|
|
.class = OMAP443X_CLASS,
|
|
.tap = OMAP2_IO_ADDRESS(0x4830a000),
|
|
.ctrl = OMAP2_IO_ADDRESS(OMAP443X_CTRL_BASE),
|
|
.prm = OMAP2_IO_ADDRESS(OMAP4430_PRM_BASE),
|
|
.cm = OMAP2_IO_ADDRESS(OMAP4430_CM_BASE),
|
|
};
|
|
|
|
void __init omap2_set_globals_443x(void)
|
|
{
|
|
omap2_set_globals_tap(&omap4_globals);
|
|
omap2_set_globals_control(&omap4_globals);
|
|
}
|
|
#endif
|
|
|