arch/mips/alchemy/xxs1500/board_setup.c

   1 /*
   2  * Copyright 2000-2003, 2008 MontaVista Software Inc.
   3  * Author: MontaVista Software, Inc. <source@mvista.com>
   4  *
   5  *  This program is free software; you can redistribute  it and/or modify it
   6  *  under  the terms of  the GNU General  Public License as published by the
   7  *  Free Software Foundation;  either version 2 of the  License, or (at your
   8  *  option) any later version.
   9  *
  10  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  11  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  12  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  13  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  14  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  15  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  16  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  17  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  18  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  19  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  20  *
  21  *  You should have received a copy of the  GNU General Public License along
  22  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  23  *  675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/gpio.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29
  30 #include <asm/mach-au1x00/au1000.h>
  31
  32 #include <prom.h>
  33
  34 void board_reset(void)
  35 {
  36         /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
  37         au_writel(0x00000000, 0xAE00001C);
  38 }
  39
  40 void __init board_setup(void)
  41 {
  42         u32 pin_func;
  43
  44 #ifdef CONFIG_SERIAL_8250_CONSOLE
  45         char *argptr;
  46         argptr = prom_getcmdline();
  47         argptr = strstr(argptr, "console=");
  48         if (argptr == NULL) {
  49                 argptr = prom_getcmdline();
  50                 strcat(argptr, " console=ttyS0,115200");
  51         }
  52 #endif
  53
  54         alchemy_gpio1_input_enable();
  55         alchemy_gpio2_enable();
  56
  57         /* Set multiple use pins (UART3/GPIO) to UART (it's used as UART too) */
  58         pin_func  = au_readl(SYS_PINFUNC) & ~SYS_PF_UR3;
  59         pin_func |= SYS_PF_UR3;
  60         au_writel(pin_func, SYS_PINFUNC);
  61
  62         /* Enable UART */
  63         au_writel(0x01, UART3_ADDR + UART_MOD_CNTRL); /* clock enable (CE) */
  64         mdelay(10);
  65         au_writel(0x03, UART3_ADDR + UART_MOD_CNTRL); /* CE and "enable" */
  66         mdelay(10);
  67
  68         /* Enable DTR = USB power up */
  69         au_writel(0x01, UART3_ADDR + UART_MCR); /* UART_MCR_DTR is 0x01??? */
  70
  71 #ifdef CONFIG_PCMCIA_XXS1500
  72         /* GPIO 0, 1, and 4 are inputs */
  73         alchemy_gpio_direction_input(0);
  74         alchemy_gpio_direction_input(1);
  75         alchemy_gpio_direction_input(4);
  76
  77         /* GPIO2 208/9/10/11 are inputs */
  78         alchemy_gpio_direction_input(208);
  79         alchemy_gpio_direction_input(209);
  80         alchemy_gpio_direction_input(210);
  81         alchemy_gpio_direction_input(211);
  82
  83         /* Turn off power */
  84         alchemy_gpio_direction_output(214, 0);
  85 #endif
  86
  87 #ifdef CONFIG_PCI
  88 #if defined(__MIPSEB__)
  89         au_writel(0xf | (2 << 6) | (1 << 4), Au1500_PCI_CFG);
  90 #else
  91         au_writel(0xf, Au1500_PCI_CFG);
  92 #endif
  93 #endif
  94 }