kernel/2.6.29.6-aldebaran-rt/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/init.h>
  32
  33 #include <asm/mach-au1x00/au1000.h>
  34
  35 #include <prom.h>
  36
  37 extern int (*board_pci_idsel)(unsigned int devsel, int assert);
  38 int mtx1_pci_idsel(unsigned int devsel, int assert);
  39
  40 void board_reset(void)
  41 {
  42         /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
  43         au_writel(0x00000000, 0xAE00001C);
  44 }
  45
  46 void __init board_setup(void)
  47 {
  48 #ifdef CONFIG_SERIAL_8250_CONSOLE
  49         char *argptr;
  50         argptr = prom_getcmdline();
  51         argptr = strstr(argptr, "console=");
  52         if (argptr == NULL) {
  53                 argptr = prom_getcmdline();
  54                 strcat(argptr, " console=ttyS0,115200");
  55         }
  56 #endif
  57
  58 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
  59         /* Enable USB power switch */
  60         au_writel(au_readl(GPIO2_DIR) | 0x10, GPIO2_DIR);
  61         au_writel(0x100000, GPIO2_OUTPUT);
  62 #endif /* defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) */
  63
  64 #ifdef CONFIG_PCI
  65 #if defined(__MIPSEB__)
  66         au_writel(0xf | (2 << 6) | (1 << 4), Au1500_PCI_CFG);
  67 #else
  68         au_writel(0xf, Au1500_PCI_CFG);
  69 #endif
  70 #endif
  71
  72         /* Initialize sys_pinfunc */
  73         au_writel(SYS_PF_NI2, SYS_PINFUNC);
  74
  75         /* Initialize GPIO */
  76         au_writel(0xFFFFFFFF, SYS_TRIOUTCLR);
  77         au_writel(0x00000001, SYS_OUTPUTCLR); /* set M66EN (PCI 66MHz) to OFF */
  78         au_writel(0x00000008, SYS_OUTPUTSET); /* set PCI CLKRUN# to OFF */
  79         au_writel(0x00000002, SYS_OUTPUTSET); /* set EXT_IO3 ON */
  80         au_writel(0x00000020, SYS_OUTPUTCLR); /* set eth PHY TX_ER to OFF */
  81
  82         /* Enable LED and set it to green */
  83         au_writel(au_readl(GPIO2_DIR) | 0x1800, GPIO2_DIR);
  84         au_writel(0x18000800, GPIO2_OUTPUT);
  85
  86         board_pci_idsel = mtx1_pci_idsel;
  87
  88         printk(KERN_INFO "4G Systems MTX-1 Board\n");
  89 }
  90
  91 int
  92 mtx1_pci_idsel(unsigned int devsel, int assert)
  93 {
  94 #define MTX_IDSEL_ONLY_0_AND_3 0
  95 #if MTX_IDSEL_ONLY_0_AND_3
  96         if (devsel != 0 && devsel != 3) {
  97                 printk(KERN_ERR "*** not 0 or 3\n");
  98                 return 0;
  99         }
 100 #endif
 101
 102         if (assert && devsel != 0)
 103                 /* Suppress signal to Cardbus */
 104                 au_writel(0x00000002, SYS_OUTPUTCLR); /* set EXT_IO3 OFF */
 105         else
 106                 au_writel(0x00000002, SYS_OUTPUTSET); /* set EXT_IO3 ON */
 107         au_sync_udelay(1);
 108         return 1;
 109 }
 110