LXR linux/arch/mips/alchemy/mtx-1/board

   1/*
   2 *
   3 * BRIEF MODULE DESCRIPTION
   4 *      4G Systems MTX-1 board setup.
   5 *
   6 * Copyright 2003, 2008 MontaVista Software Inc.
   7 * Author: MontaVista Software, Inc. <source@mvista.com>
   8 *         Bruno Randolf <bruno.randolf@4g-systems.biz>
   9 *
  10 *  This program is free software; you can redistribute  it and/or modify it
  11 *  under  the terms of  the GNU General  Public License as published by the
  12 *  Free Software Foundation;  either version 2 of the  License, or (at your
  13 *  option) any later version.
  14 *
  15 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  16 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  17 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  18 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  19 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  21 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  22 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  23 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25 *
  26 *  You should have received a copy of the  GNU General Public License along
  27 *  with this program; if not, write  to the Free Software Foundation, Inc.,
  28 *  675 Mass Ave, Cambridge, MA 02139, USA.
  29 */
  30
  31#include <linux/gpio.h>
  32#include <linux/init.h>
  33
  34#include <asm/mach-au1x00/au1000.h>
  35
  36#include <prom.h>
  37
  38extern int (*board_pci_idsel)(unsigned int devsel, int assert);
  39int mtx1_pci_idsel(unsigned int devsel, int assert);
  40
  41void board_reset(void)
  42{
  43        /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
  44        au_writel(0x00000000, 0xAE00001C);
  45}
  46
  47void __init board_setup(void)
  48{
  49#ifdef CONFIG_SERIAL_8250_CONSOLE
  50        char *argptr;
  51        argptr = prom_getcmdline();
  52        argptr = strstr(argptr, "console=");
  53        if (argptr == NULL) {
  54                argptr = prom_getcmdline();
  55                strcat(argptr, " console=ttyS0,115200");
  56        }
  57#endif
  58
  59        alchemy_gpio2_enable();
  60
  61#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
  62        /* Enable USB power switch */
  63        alchemy_gpio_direction_output(204, 0);
  64#endif /* defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) */
  65
  66#ifdef CONFIG_PCI
  67#if defined(__MIPSEB__)
  68        au_writel(0xf | (2 << 6) | (1 << 4), Au1500_PCI_CFG);
  69#else
  70        au_writel(0xf, Au1500_PCI_CFG);
  71#endif
  72        board_pci_idsel = mtx1_pci_idsel;
  73#endif
  74
  75        /* Initialize sys_pinfunc */
  76        au_writel(SYS_PF_NI2, SYS_PINFUNC);
  77
  78        /* Initialize GPIO */
  79        au_writel(0xFFFFFFFF, SYS_TRIOUTCLR);
  80        alchemy_gpio_direction_output(0, 0);    /* Disable M66EN (PCI 66MHz) */
  81        alchemy_gpio_direction_output(3, 1);    /* Disable PCI CLKRUN# */
  82        alchemy_gpio_direction_output(1, 1);    /* Enable EXT_IO3 */
  83        alchemy_gpio_direction_output(5, 0);    /* Disable eth PHY TX_ER */
  84
  85        /* Enable LED and set it to green */
  86        alchemy_gpio_direction_output(211, 1);  /* green on */
  87        alchemy_gpio_direction_output(212, 0);  /* red off */
  88
  89        printk(KERN_INFO "4G Systems MTX-1 Board\n");
  90}
  91
  92int
  93mtx1_pci_idsel(unsigned int devsel, int assert)
  94{
  95#define MTX_IDSEL_ONLY_0_AND_3 0
  96#if MTX_IDSEL_ONLY_0_AND_3
  97        if (devsel != 0 && devsel != 3) {
  98                printk(KERN_ERR "*** not 0 or 3\n");
  99                return 0;
 100        }
 101#endif
 102
 103        if (assert && devsel != 0)
 104                /* Suppress signal to Cardbus */
 105                gpio_set_value(1, 0);   /* set EXT_IO3 OFF */
 106        else
 107                gpio_set_value(1, 1);   /* set EXT_IO3 ON */
 108
 109        au_sync_udelay(1);
 110        return 1;
 111}
 112