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

   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
  38 extern int (*board_pci_idsel)(unsigned int devsel, int assert);
  39 int mtx1_pci_idsel(unsigned int devsel, int assert);
  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 #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 #endif
  73
  74         /* Initialize sys_pinfunc */
  75         au_writel(SYS_PF_NI2, SYS_PINFUNC);
  76
  77         /* Initialize GPIO */
  78         au_writel(0xFFFFFFFF, SYS_TRIOUTCLR);
  79         alchemy_gpio_direction_output(0, 0);    /* Disable M66EN (PCI 66MHz) */
  80         alchemy_gpio_direction_output(3, 1);    /* Disable PCI CLKRUN# */
  81         alchemy_gpio_direction_output(1, 1);    /* Enable EXT_IO3 */
  82         alchemy_gpio_direction_output(5, 0);    /* Disable eth PHY TX_ER */
  83
  84         /* Enable LED and set it to green */
  85         alchemy_gpio_direction_output(211, 1);  /* green on */
  86         alchemy_gpio_direction_output(212, 0);  /* red off */
  87
  88         board_pci_idsel = mtx1_pci_idsel;
  89
  90         printk(KERN_INFO "4G Systems MTX-1 Board\n");
  91 }
  92
  93 int
  94 mtx1_pci_idsel(unsigned int devsel, int assert)
  95 {
  96 #define MTX_IDSEL_ONLY_0_AND_3 0
  97 #if MTX_IDSEL_ONLY_0_AND_3
  98         if (devsel != 0 && devsel != 3) {
  99                 printk(KERN_ERR "*** not 0 or 3\n");
 100                 return 0;
 101         }
 102 #endif
 103
 104         if (assert && devsel != 0)
 105                 /* Suppress signal to Cardbus */
 106                 gpio_set_value(1, 0);   /* set EXT_IO3 OFF */
 107         else
 108                 gpio_set_value(1, 1);   /* set EXT_IO3 ON */
 109
 110         au_sync_udelay(1);
 111         return 1;
 112 }