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Diffstat (limited to 'arch/mips/au1000/common/reset.c')
| -rw-r--r-- | arch/mips/au1000/common/reset.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/arch/mips/au1000/common/reset.c b/arch/mips/au1000/common/reset.c new file mode 100644 index 00000000000..65b84db800e --- /dev/null +++ b/arch/mips/au1000/common/reset.c @@ -0,0 +1,195 @@ +/* + * + * 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(); +} |