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linux/arch/mips/au1000/common/reset.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

195 lines
7.1 KiB
C
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/*
*
* BRIEF MODULE DESCRIPTION
* Au1000 reset routines.
*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or 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 <linux/config.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/reboot.h>
#include <asm/system.h>
#include <asm/mach-au1x00/au1000.h>
extern int au_sleep(void);
extern void (*flush_cache_all)(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;
default:
break;
}
set_c0_status(ST0_BEV | ST0_ERL);
set_c0_config(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)
/* power off system */
printk("\n** Powering off Pb1550\n");
au_writew(au_readw(0xAF00001C) | (3<<14), 0xAF00001C);
au_sync();
while(1); /* should not get here */
#endif
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_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
}
void au1000_power_off(void)
{
au1000_halt();
}
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