arch/mips/au1000/mtx-1/board_setup.c

   1 /*
   2  *
   3  * BRIEF MODULE DESCRIPTION
   4  *      4G Systems MTX-1 board setup.
   5  *
   6  * Copyright 2003 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc.
   8  *              ppopov@mvista.com or source@mvista.com
   9  *         Bruno Randolf <bruno.randolf@4g-systems.biz>
  10  *
  11  *  This program is free software; you can redistribute  it and/or modify it
  12  *  under  the terms of  the GNU General  Public License as published by the
  13  *  Free Software Foundation;  either version 2 of the  License, or (at your
  14  *  option) any later version.
  15  *
  16  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  17  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  18  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  19  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  20  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  22  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  23  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  24  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  *  You should have received a copy of the  GNU General Public License along
  28  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  29  *  675 Mass Ave, Cambridge, MA 02139, USA.
  30  */
  31 #include <linux/init.h>
  32 #include <linux/sched.h>
  33 #include <linux/ioport.h>
  34 #include <linux/mm.h>
  35 #include <linux/console.h>
  36 #include <linux/delay.h>
  37
  38 #include <asm/cpu.h>
  39 #include <asm/bootinfo.h>
  40 #include <asm/irq.h>
  41 #include <asm/mipsregs.h>
  42 #include <asm/reboot.h>
  43 #include <asm/pgtable.h>
  44 #include <asm/mach-au1x00/au1000.h>
  45
  46 extern int (*board_pci_idsel)(unsigned int devsel, int assert);
  47 int    mtx1_pci_idsel(unsigned int devsel, int assert);
  48
  49 void board_reset(void)
  50 {
  51         /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
  52         au_writel(0x00000000, 0xAE00001C);
  53 }
  54
  55 void __init board_setup(void)
  56 {
  57 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
  58         // enable USB power switch
  59         au_writel( au_readl(GPIO2_DIR) | 0x10, GPIO2_DIR );
  60         au_writel( 0x100000, GPIO2_OUTPUT );
  61 #endif /* defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) */
  62
  63 #ifdef CONFIG_PCI
  64 #if defined(__MIPSEB__)
  65         au_writel(0xf | (2<<6) | (1<<4), Au1500_PCI_CFG);
  66 #else
  67         au_writel(0xf, Au1500_PCI_CFG);
  68 #endif
  69 #endif
  70
  71         // initialize sys_pinfunc:
  72         au_writel( SYS_PF_NI2, SYS_PINFUNC );
  73
  74         // initialize GPIO
  75         au_writel( 0xFFFFFFFF, SYS_TRIOUTCLR );
  76         au_writel( 0x00000001, SYS_OUTPUTCLR ); // set M66EN (PCI 66MHz) to OFF
  77         au_writel( 0x00000008, SYS_OUTPUTSET ); // set PCI CLKRUN# to OFF
  78         au_writel( 0x00000002, SYS_OUTPUTSET ); // set EXT_IO3 ON
  79         au_writel( 0x00000020, SYS_OUTPUTCLR ); // set eth PHY TX_ER to OFF
  80
  81         // enable LED and set it to green
  82         au_writel( au_readl(GPIO2_DIR) | 0x1800, GPIO2_DIR );
  83         au_writel( 0x18000800, GPIO2_OUTPUT );
  84
  85         board_pci_idsel = mtx1_pci_idsel;
  86
  87         printk("4G Systems MTX-1 Board\n");
  88 }
  89
  90 int
  91 mtx1_pci_idsel(unsigned int devsel, int assert)
  92 {
  93 #define MTX_IDSEL_ONLY_0_AND_3 0
  94 #if MTX_IDSEL_ONLY_0_AND_3
  95        if (devsel != 0 && devsel != 3) {
  96                printk("*** not 0 or 3\n");
  97                return 0;
  98        }
  99 #endif
 100
 101        if (assert && devsel != 0) {
 102                // supress signal to cardbus
 103                au_writel( 0x00000002, SYS_OUTPUTCLR ); // set EXT_IO3 OFF
 104        }
 105        else {
 106                au_writel( 0x00000002, SYS_OUTPUTSET ); // set EXT_IO3 ON
 107        }
 108        au_sync_udelay(1);
 109        return 1;
 110 }
 111