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reset.c

/*
 *
 * BRIEF MODULE DESCRIPTION
 *    Au1xx0 reset routines.
 *
 * Copyright 2001, 2006, 2008 MontaVista Software Inc.
 * Author: MontaVista Software, Inc. <source@mvista.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <asm/cacheflush.h>

#include <asm/mach-au1x00/au1000.h>

extern int au_sleep(void);

void au1000_restart(char *command)
{
      /* Set all integrated peripherals to disabled states */
      extern void board_reset(void);
      u32 prid = read_c0_prid();

      printk(KERN_NOTICE "\n** Resetting Integrated Peripherals\n");

      switch (prid & 0xFF000000) {
      case 0x00000000: /* Au1000 */
            au_writel(0x02, 0xb0000010); /* ac97_enable */
            au_writel(0x08, 0xb017fffc); /* usbh_enable - early errata */
            asm("sync");
            au_writel(0x00, 0xb017fffc); /* usbh_enable */
            au_writel(0x00, 0xb0200058); /* usbd_enable */
            au_writel(0x00, 0xb0300040); /* ir_enable */
            au_writel(0x00, 0xb4004104); /* mac dma */
            au_writel(0x00, 0xb4004114); /* mac dma */
            au_writel(0x00, 0xb4004124); /* mac dma */
            au_writel(0x00, 0xb4004134); /* mac dma */
            au_writel(0x00, 0xb0520000); /* macen0 */
            au_writel(0x00, 0xb0520004); /* macen1 */
            au_writel(0x00, 0xb1000008); /* i2s_enable  */
            au_writel(0x00, 0xb1100100); /* uart0_enable */
            au_writel(0x00, 0xb1200100); /* uart1_enable */
            au_writel(0x00, 0xb1300100); /* uart2_enable */
            au_writel(0x00, 0xb1400100); /* uart3_enable */
            au_writel(0x02, 0xb1600100); /* ssi0_enable */
            au_writel(0x02, 0xb1680100); /* ssi1_enable */
            au_writel(0x00, 0xb1900020); /* sys_freqctrl0 */
            au_writel(0x00, 0xb1900024); /* sys_freqctrl1 */
            au_writel(0x00, 0xb1900028); /* sys_clksrc */
            au_writel(0x10, 0xb1900060); /* sys_cpupll */
            au_writel(0x00, 0xb1900064); /* sys_auxpll */
            au_writel(0x00, 0xb1900100); /* sys_pininputen */
            break;
      case 0x01000000: /* Au1500 */
            au_writel(0x02, 0xb0000010); /* ac97_enable */
            au_writel(0x08, 0xb017fffc); /* usbh_enable - early errata */
            asm("sync");
            au_writel(0x00, 0xb017fffc); /* usbh_enable */
            au_writel(0x00, 0xb0200058); /* usbd_enable */
            au_writel(0x00, 0xb4004104); /* mac dma */
            au_writel(0x00, 0xb4004114); /* mac dma */
            au_writel(0x00, 0xb4004124); /* mac dma */
            au_writel(0x00, 0xb4004134); /* mac dma */
            au_writel(0x00, 0xb1520000); /* macen0 */
            au_writel(0x00, 0xb1520004); /* macen1 */
            au_writel(0x00, 0xb1100100); /* uart0_enable */
            au_writel(0x00, 0xb1400100); /* uart3_enable */
            au_writel(0x00, 0xb1900020); /* sys_freqctrl0 */
            au_writel(0x00, 0xb1900024); /* sys_freqctrl1 */
            au_writel(0x00, 0xb1900028); /* sys_clksrc */
            au_writel(0x10, 0xb1900060); /* sys_cpupll */
            au_writel(0x00, 0xb1900064); /* sys_auxpll */
            au_writel(0x00, 0xb1900100); /* sys_pininputen */
            break;
      case 0x02000000: /* Au1100 */
            au_writel(0x02, 0xb0000010); /* ac97_enable */
            au_writel(0x08, 0xb017fffc); /* usbh_enable - early errata */
            asm("sync");
            au_writel(0x00, 0xb017fffc); /* usbh_enable */
            au_writel(0x00, 0xb0200058); /* usbd_enable */
            au_writel(0x00, 0xb0300040); /* ir_enable */
            au_writel(0x00, 0xb4004104); /* mac dma */
            au_writel(0x00, 0xb4004114); /* mac dma */
            au_writel(0x00, 0xb4004124); /* mac dma */
            au_writel(0x00, 0xb4004134); /* mac dma */
            au_writel(0x00, 0xb0520000); /* macen0 */
            au_writel(0x00, 0xb1000008); /* i2s_enable  */
            au_writel(0x00, 0xb1100100); /* uart0_enable */
            au_writel(0x00, 0xb1200100); /* uart1_enable */
            au_writel(0x00, 0xb1400100); /* uart3_enable */
            au_writel(0x02, 0xb1600100); /* ssi0_enable */
            au_writel(0x02, 0xb1680100); /* ssi1_enable */
            au_writel(0x00, 0xb1900020); /* sys_freqctrl0 */
            au_writel(0x00, 0xb1900024); /* sys_freqctrl1 */
            au_writel(0x00, 0xb1900028); /* sys_clksrc */
            au_writel(0x10, 0xb1900060); /* sys_cpupll */
            au_writel(0x00, 0xb1900064); /* sys_auxpll */
            au_writel(0x00, 0xb1900100); /* sys_pininputen */
            break;
      case 0x03000000: /* Au1550 */
            au_writel(0x00, 0xb1a00004); /* psc 0 */
            au_writel(0x00, 0xb1b00004); /* psc 1 */
            au_writel(0x00, 0xb0a00004); /* psc 2 */
            au_writel(0x00, 0xb0b00004); /* psc 3 */
            au_writel(0x00, 0xb017fffc); /* usbh_enable */
            au_writel(0x00, 0xb0200058); /* usbd_enable */
            au_writel(0x00, 0xb4004104); /* mac dma */
            au_writel(0x00, 0xb4004114); /* mac dma */
            au_writel(0x00, 0xb4004124); /* mac dma */
            au_writel(0x00, 0xb4004134); /* mac dma */
            au_writel(0x00, 0xb1520000); /* macen0 */
            au_writel(0x00, 0xb1520004); /* macen1 */
            au_writel(0x00, 0xb1100100); /* uart0_enable */
            au_writel(0x00, 0xb1200100); /* uart1_enable */
            au_writel(0x00, 0xb1400100); /* uart3_enable */
            au_writel(0x00, 0xb1900020); /* sys_freqctrl0 */
            au_writel(0x00, 0xb1900024); /* sys_freqctrl1 */
            au_writel(0x00, 0xb1900028); /* sys_clksrc */
            au_writel(0x10, 0xb1900060); /* sys_cpupll */
            au_writel(0x00, 0xb1900064); /* sys_auxpll */
            au_writel(0x00, 0xb1900100); /* sys_pininputen */
            break;
      }

      set_c0_status(ST0_BEV | ST0_ERL);
      change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
      flush_cache_all();
      write_c0_wired(0);

      /* Give board a chance to do a hardware reset */
      board_reset();

      /* Jump to the beggining in case board_reset() is empty */
      __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
}

void au1000_halt(void)
{
#if defined(CONFIG_MIPS_PB1550) || defined(CONFIG_MIPS_DB1550)
      /* Power off system */
      printk(KERN_NOTICE "\n** Powering off...\n");
      au_writew(au_readw(0xAF00001C) | (3 << 14), 0xAF00001C);
      au_sync();
      while (1); /* should not get here */
#else
      printk(KERN_NOTICE "\n** You can safely turn off the power\n");
#ifdef CONFIG_MIPS_MIRAGE
      au_writel((1 << 26) | (1 << 10), GPIO2_OUTPUT);
#endif
#ifdef CONFIG_MIPS_DB1200
      au_writew(au_readw(0xB980001C) | (1 << 14), 0xB980001C);
#endif
#ifdef CONFIG_PM
      au_sleep();

      /* Should not get here */
      printk(KERN_ERR "Unable to put CPU in sleep mode\n");
      while (1);
#else
      while (1)
            __asm__(".set\tmips3\n\t"
                      "wait\n\t"
                  ".set\tmips0");
#endif
#endif /* defined(CONFIG_MIPS_PB1550) || defined(CONFIG_MIPS_DB1550) */
}

void au1000_power_off(void)
{
      au1000_halt();
}

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