board_setup.c

LINUX 2.6.17.4的源码

/*
 *
 * BRIEF MODULE DESCRIPTION
 *	4G Systems MTX-1 board setup.
 *
 * Copyright 2003 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *         	[e-mail] or [e-mail]
 *         Bruno Randolf <[e-mail]>
 *
 *  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  SOFTWARE  IS PROVIDED   ``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 AUTHOR  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.
 *
 *  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.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/config.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/console.h>
#include <linux/delay.h>

#include <asm/cpu.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/mipsregs.h>
#include <asm/reboot.h>
#include <asm/pgtable.h>
#include <asm/mach-au1x00/au1000.h>

void board_reset (void)
{
	/* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
	au_writel(0x00000000, 0xAE00001C);
}

void __init board_setup(void)
{
#if defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE)
#ifdef CONFIG_AU1X00_USB_DEVICE
	// 2nd USB port is USB device
	au_writel(au_readl(SYS_PINFUNC) & (u32)(~0x8000), SYS_PINFUNC);
#endif
	// enable USB power switch
	au_writel( au_readl(GPIO2_DIR) | 0x10, GPIO2_DIR );
	au_writel( 0x100000, GPIO2_OUTPUT );
#endif // defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE)

#ifdef CONFIG_PCI
#if defined(__MIPSEB__)
	au_writel(0xf | (2<<6) | (1<<4), Au1500_PCI_CFG);
#else
	au_writel(0xf, Au1500_PCI_CFG);
#endif
#endif

	// initialize sys_pinfunc:
	// disable second ethernet port (SYS_PF_NI2)
	// set U3/GPIO23 to GPIO23 (SYS_PF_U3)
	au_writel( SYS_PF_NI2 | SYS_PF_U3, SYS_PINFUNC );

	// initialize GPIO
	au_writel( 0xFFFFFFFF, SYS_TRIOUTCLR );
	au_writel( 0x00000001, SYS_OUTPUTCLR ); // set M66EN (PCI 66MHz) to OFF
	au_writel( 0x00000008, SYS_OUTPUTSET ); // set PCI CLKRUN# to OFF
	au_writel( 0x00000020, SYS_OUTPUTCLR ); // set eth PHY TX_ER to OFF

	// enable LED and set it to green
	au_writel( au_readl(GPIO2_DIR) | 0x1800, GPIO2_DIR );
	au_writel( 0x18000800, GPIO2_OUTPUT );

	printk("4G Systems MTX-1 Board\n");
}