platform/mdm9x15/platform.c

/*
 * Copyright (c) 2008, Google Inc.
 * All rights reserved.
 *
 * Copyright (c) 2009-2011, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *	notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *	notice, this list of conditions and the following disclaimer in
 *	the documentation and/or other materials provided with the
 *	distribution.
 *  * Neither the name of Google, Inc. nor the names of its contributors
 *	may be used to endorse or promote products derived from this
 *	software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <reg.h>
#include <debug.h>
#include <kernel/thread.h>
#include <platform/debug.h>
#include <platform/iomap.h>
#include <smem.h>
#include <qgic.h>

static uint32_t ticks_per_sec = 0;

extern void platform_uninit_timer(void);

void platform_init_timer();

void platform_early_init(void)
{
	uint8_t cfg_bid = 0x1;
	uint8_t cfg_pid = 0x1;
	uint8_t gsbi_id = target_uart_gsbi();

	uart_dm_init(gsbi_id, GSBI_BASE(gsbi_id), GSBI_UART_DM_BASE(gsbi_id));

	/* Timers - QGIC Config */
	writel((cfg_bid << 7 | cfg_pid << 10), APCS_GLB_QGIC_CFG);
	qgic_init();
	platform_init_timer();
}

void platform_init(void)
{
	dprintf(INFO, "platform_init()\n");
	acpu_clock_init();
}

void platform_uninit(void)
{
	platform_uninit_timer();
}

/* Initialize DGT timer */
void platform_init_timer(void)
{
	/* disable timer */
	writel(0, DGT_ENABLE);

	ticks_per_sec = 19200000; /* Uses CXO (19.2 MHz) */
}

/* Returns timer ticks per sec */
uint32_t platform_tick_rate(void)
{
	return ticks_per_sec;
}