arch/mips/au1000/pb1100/board_setup.c

   1 /*
   2  * Copyright 2002 MontaVista Software Inc.
   3  * Author: MontaVista Software, Inc.
   4  *              ppopov@mvista.com or source@mvista.com
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  *
  11  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  12  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  13  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  14  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  15  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  16  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  17  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  18  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  19  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  20  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  21  *
  22  *  You should have received a copy of the  GNU General Public License along
  23  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  24  *  675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26 #include <linux/config.h>
  27 #include <linux/init.h>
  28 #include <linux/sched.h>
  29 #include <linux/ioport.h>
  30 #include <linux/mm.h>
  31 #include <linux/console.h>
  32 #include <linux/delay.h>
  33
  34 #include <asm/cpu.h>
  35 #include <asm/bootinfo.h>
  36 #include <asm/irq.h>
  37 #include <asm/mipsregs.h>
  38 #include <asm/reboot.h>
  39 #include <asm/pgtable.h>
  40 #include <asm/mach-au1x00/au1000.h>
  41 #include <asm/mach-pb1x00/pb1100.h>
  42
  43 void board_reset (void)
  44 {
  45     /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
  46     au_writel(0x00000000, 0xAE00001C);
  47 }
  48
  49 void __init board_setup(void)
  50 {
  51         u32 pin_func;
  52         u32 sys_freqctrl, sys_clksrc;
  53
  54         // set AUX clock to 12MHz * 8 = 96 MHz
  55         au_writel(8, SYS_AUXPLL);
  56         au_writel(0, SYS_PININPUTEN);
  57         udelay(100);
  58
  59 #if defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE)
  60         // configure pins GPIO[14:9] as GPIO
  61         pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x80);
  62
  63         /* zero and disable FREQ2 */
  64         sys_freqctrl = au_readl(SYS_FREQCTRL0);
  65         sys_freqctrl &= ~0xFFF00000;
  66         au_writel(sys_freqctrl, SYS_FREQCTRL0);
  67
  68         /* zero and disable USBH/USBD/IrDA clock */
  69         sys_clksrc = au_readl(SYS_CLKSRC);
  70         sys_clksrc &= ~0x0000001F;
  71         au_writel(sys_clksrc, SYS_CLKSRC);
  72
  73         sys_freqctrl = au_readl(SYS_FREQCTRL0);
  74         sys_freqctrl &= ~0xFFF00000;
  75
  76         sys_clksrc = au_readl(SYS_CLKSRC);
  77         sys_clksrc &= ~0x0000001F;
  78
  79         // FREQ2 = aux/2 = 48 MHz
  80         sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20));
  81         au_writel(sys_freqctrl, SYS_FREQCTRL0);
  82
  83         /*
  84          * Route 48MHz FREQ2 into USBH/USBD/IrDA
  85          */
  86         sys_clksrc |= ((4<<2) | (0<<1) | 0 );
  87         au_writel(sys_clksrc, SYS_CLKSRC);
  88
  89         /* setup the static bus controller */
  90         au_writel(0x00000002, MEM_STCFG3);  /* type = PCMCIA */
  91         au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */
  92         au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */
  93
  94         // get USB Functionality pin state (device vs host drive pins)
  95         pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8000);
  96 #ifndef CONFIG_AU1X00_USB_DEVICE
  97         // 2nd USB port is USB host
  98         pin_func |= 0x8000;
  99 #endif
 100         au_writel(pin_func, SYS_PINFUNC);
 101 #endif // defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE)
 102
 103         /* Enable sys bus clock divider when IDLE state or no bus activity. */
 104         au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL);
 105
 106         // Enable the RTC if not already enabled
 107         if (!(readb(0xac000028) & 0x20)) {
 108                 writeb(readb(0xac000028) | 0x20, 0xac000028);
 109                 au_sync();
 110         }
 111         // Put the clock in BCD mode
 112         if (readb(0xac00002C) & 0x4) { /* reg B */
 113                 writeb(readb(0xac00002c) & ~0x4, 0xac00002c);
 114                 au_sync();
 115         }
 116 }