/arch/mips/gt64120/momenco_ocelot/reset.c

https://bitbucket.org/evzijst/gittest · C · 47 lines · 32 code · 4 blank · 11 comment · 2 complexity · 91fd485cdc008831196210b5da2650f4 MD5 · raw file 

    

  1. /*
    2. 

  2.  * This program is free software; you can redistribute  it and/or modify it
    3. 

  3.  * under  the terms of  the GNU General  Public License as published by the
    4. 

  4.  * Free Software Foundation;  either version 2 of the  License, or (at your
    5. 

  5.  * option) any later version.
    6. 

  6.  *
    7. 

  7.  * Copyright (C) 1997, 2001 Ralf Baechle
    8. 

  8.  * Copyright 2001 MontaVista Software Inc.
    9. 

  9.  * Author: jsun@mvista.com or jsun@junsun.net
    10. 

  10.  */
    11. 

  11. #include <linux/sched.h>
    12. 

  12. #include <linux/mm.h>
    13. 

  13. #include <asm/io.h>
    14. 

  14. #include <asm/pgtable.h>
    15. 

  15. #include <asm/processor.h>
    16. 

  16. #include <asm/reboot.h>
    17. 

  17. #include <asm/system.h>
    18. 

  18. #include <linux/delay.h>
    19. 

  19. 

  20. void momenco_ocelot_restart(char *command)
    21. 

  21. {
    22. 

  22. 	void *nvram = ioremap_nocache(0x2c807000, 0x1000);
    23. 

  23. 

  24. 	if (!nvram) {
    25. 

  25. 		printk(KERN_NOTICE "ioremap of reset register failed\n");
    26. 

  26. 		return;
    27. 

  27. 	}
    28. 

  28. 	writeb(0x84, nvram + 0xff7); /* Ask the NVRAM/RTC/watchdog chip to
    29. 

  29. 					assert reset in 1/16 second */
    30. 

  30. 	mdelay(10+(1000/16));
    31. 

  31. 	iounmap(nvram);
    32. 

  32. 	printk(KERN_NOTICE "Watchdog reset failed\n");
    33. 

  33. }
    34. 

  34. 

  35. void momenco_ocelot_halt(void)
    36. 

  36. {
    37. 

  37. 	printk(KERN_NOTICE "\n** You can safely turn off the power\n");
    38. 

  38. 	while (1)
    39. 

  39. 		__asm__(".set\tmips3\n\t"
    40. 

  40. 	                "wait\n\t"
    41. 

  41. 			".set\tmips0");
    42. 

  42. }
    43. 

  43. 

  44. void momenco_ocelot_power_off(void)
    45. 

  45. {
    46. 

  46. 	momenco_ocelot_halt();
    47. 

  47. }
    48.