mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
113 lines
3.6 KiB
C
113 lines
3.6 KiB
C
/*
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* Copyright 2002 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <asm/cpu.h>
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#include <asm/bootinfo.h>
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#include <asm/irq.h>
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#include <asm/mipsregs.h>
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#include <asm/reboot.h>
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#include <asm/pgtable.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-pb1x00/pb1100.h>
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void board_reset (void)
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{
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/* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
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au_writel(0x00000000, 0xAE00001C);
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}
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void __init board_setup(void)
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{
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u32 pin_func;
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u32 sys_freqctrl, sys_clksrc;
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// set AUX clock to 12MHz * 8 = 96 MHz
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au_writel(8, SYS_AUXPLL);
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au_writel(0, SYS_PININPUTEN);
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udelay(100);
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#ifdef CONFIG_USB_OHCI
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// configure pins GPIO[14:9] as GPIO
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pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x80);
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/* zero and disable FREQ2 */
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sys_freqctrl = au_readl(SYS_FREQCTRL0);
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sys_freqctrl &= ~0xFFF00000;
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au_writel(sys_freqctrl, SYS_FREQCTRL0);
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/* zero and disable USBH/USBD/IrDA clock */
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sys_clksrc = au_readl(SYS_CLKSRC);
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sys_clksrc &= ~0x0000001F;
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au_writel(sys_clksrc, SYS_CLKSRC);
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sys_freqctrl = au_readl(SYS_FREQCTRL0);
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sys_freqctrl &= ~0xFFF00000;
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sys_clksrc = au_readl(SYS_CLKSRC);
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sys_clksrc &= ~0x0000001F;
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// FREQ2 = aux/2 = 48 MHz
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sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20));
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au_writel(sys_freqctrl, SYS_FREQCTRL0);
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/*
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* Route 48MHz FREQ2 into USBH/USBD/IrDA
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*/
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sys_clksrc |= ((4<<2) | (0<<1) | 0 );
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au_writel(sys_clksrc, SYS_CLKSRC);
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/* setup the static bus controller */
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au_writel(0x00000002, MEM_STCFG3); /* type = PCMCIA */
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au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */
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au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */
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// get USB Functionality pin state (device vs host drive pins)
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pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8000);
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// 2nd USB port is USB host
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pin_func |= 0x8000;
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au_writel(pin_func, SYS_PINFUNC);
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#endif // defined (CONFIG_USB_OHCI)
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/* Enable sys bus clock divider when IDLE state or no bus activity. */
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au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL);
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// Enable the RTC if not already enabled
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if (!(readb(0xac000028) & 0x20)) {
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writeb(readb(0xac000028) | 0x20, 0xac000028);
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au_sync();
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}
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// Put the clock in BCD mode
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if (readb(0xac00002C) & 0x4) { /* reg B */
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writeb(readb(0xac00002c) & ~0x4, 0xac00002c);
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au_sync();
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}
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}
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