arch/mips/au1000/xxs1500/board_setup.c

   1 /*
   2  * Copyright 2000-2003 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/init.h>
  27 #include <linux/sched.h>
  28 #include <linux/ioport.h>
  29 #include <linux/mm.h>
  30 #include <linux/console.h>
  31 #include <linux/delay.h>
  32
  33 #include <asm/cpu.h>
  34 #include <asm/bootinfo.h>
  35 #include <asm/irq.h>
  36 #include <asm/mipsregs.h>
  37 #include <asm/reboot.h>
  38 #include <asm/pgtable.h>
  39 #include <asm/mach-au1x00/au1000.h>
  40
  41 void board_reset(void)
  42 {
  43         /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
  44         au_writel(0x00000000, 0xAE00001C);
  45 }
  46
  47 void __init board_setup(void)
  48 {
  49         u32 pin_func;
  50
  51         // set multiple use pins (UART3/GPIO) to UART (it's used as UART too)
  52         pin_func = au_readl(SYS_PINFUNC) & (u32)(~SYS_PF_UR3);
  53         pin_func |= SYS_PF_UR3;
  54         au_writel(pin_func, SYS_PINFUNC);
  55
  56         // enable UART
  57         au_writel(0x01, UART3_ADDR+UART_MOD_CNTRL); // clock enable (CE)
  58         mdelay(10);
  59         au_writel(0x03, UART3_ADDR+UART_MOD_CNTRL); // CE and "enable"
  60         mdelay(10);
  61
  62         // enable DTR = USB power up
  63         au_writel(0x01, UART3_ADDR+UART_MCR); //? UART_MCR_DTR is 0x01???
  64
  65 #ifdef CONFIG_PCMCIA_XXS1500
  66         /* setup pcmcia signals */
  67         au_writel(0, SYS_PININPUTEN);
  68
  69         /* gpio 0, 1, and 4 are inputs */
  70         au_writel(1 | (1<<1) | (1<<4), SYS_TRIOUTCLR);
  71
  72         /* enable GPIO2 if not already enabled */
  73         au_writel(1, GPIO2_ENABLE);
  74         /* gpio2 208/9/10/11 are inputs */
  75         au_writel((1<<8) | (1<<9) | (1<<10) | (1<<11), GPIO2_DIR);
  76
  77         /* turn off power */
  78         au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<14))|(1<<30), GPIO2_OUTPUT);
  79 #endif
  80
  81
  82 #ifdef CONFIG_PCI
  83 #if defined(__MIPSEB__)
  84         au_writel(0xf | (2<<6) | (1<<4), Au1500_PCI_CFG);
  85 #else
  86         au_writel(0xf, Au1500_PCI_CFG);
  87 #endif
  88 #endif
  89 }