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133 lines
4.0 KiB
C
133 lines
4.0 KiB
C
/*
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* Copyright 2000 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/pb1500.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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sys_clksrc = sys_freqctrl = pin_func = 0;
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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_PINSTATERD);
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udelay(100);
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#ifdef CONFIG_USB_OHCI
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/* GPIO201 is input for PCMCIA card detect */
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/* GPIO203 is input for PCMCIA interrupt request */
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au_writel(au_readl(GPIO2_DIR) & (u32)(~((1<<1)|(1<<3))), GPIO2_DIR);
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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 clocks */
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sys_clksrc = au_readl(SYS_CLKSRC);
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sys_clksrc &= ~0x00007FE0;
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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 &= ~0x00007FE0;
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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 USB Host and/or Device
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*/
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#ifdef CONFIG_USB_OHCI
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sys_clksrc |= ((4<<12) | (0<<11) | (0<<10));
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#endif
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au_writel(sys_clksrc, SYS_CLKSRC);
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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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#ifdef CONFIG_PCI
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// Setup PCI bus controller
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au_writel(0, Au1500_PCI_CMEM);
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au_writel(0x00003fff, Au1500_CFG_BASE);
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#if defined(__MIPSEB__)
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au_writel(0xf | (2<<6) | (1<<4), Au1500_PCI_CFG);
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#else
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au_writel(0xf, Au1500_PCI_CFG);
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#endif
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au_writel(0xf0000000, Au1500_PCI_MWMASK_DEV);
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au_writel(0, Au1500_PCI_MWBASE_REV_CCL);
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au_writel(0x02a00356, Au1500_PCI_STATCMD);
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au_writel(0x00003c04, Au1500_PCI_HDRTYPE);
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au_writel(0x00000008, Au1500_PCI_MBAR);
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au_sync();
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#endif
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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 (!(au_readl(0xac000028) & 0x20)) {
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printk("enabling clock ...\n");
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au_writel((au_readl(0xac000028) | 0x20), 0xac000028);
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}
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/* Put the clock in BCD mode */
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if (readl(0xac00002C) & 0x4) { /* reg B */
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au_writel(au_readl(0xac00002c) & ~0x4, 0xac00002c);
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au_sync();
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}
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}
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