arch/arm/mach-iop3xx/common.c

   1 /*
   2  * arch/arm/mach-iop3xx/common.c
   3  *
   4  * Common routines shared across all IOP3xx implementations
   5  *
   6  * Author: Deepak Saxena <dsaxena@mvista.com>
   7  *
   8  * Copyright 2003 (c) MontaVista, Software, Inc.
   9  *
  10  * This file is licensed under  the terms of the GNU General Public
  11  * License version 2. This program is licensed "as is" without any
  12  * warranty of any kind, whether express or implied.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <asm/hardware.h>
  17
  18 /*
  19  * Shared variables
  20  */
  21 unsigned long iop3xx_pcibios_min_io = 0;
  22 unsigned long iop3xx_pcibios_min_mem = 0;
  23
  24 #ifdef CONFIG_ARCH_EP80219
  25 #include <linux/kernel.h>
  26 /*
  27  * Default power-off for EP80219
  28  */
  29
  30 static inline void ep80219_send_to_pic(__u8 c) {
  31 }
  32
  33 void ep80219_power_off(void)
  34 {
  35         /*
  36      * This function will send a SHUTDOWN_COMPLETE message to the PIC controller
  37      * over I2C.  We are not using the i2c subsystem since we are going to power
  38      * off and it may be removed
  39      */
  40
  41         /* Send the Address byte w/ the start condition */
  42         *IOP321_IDBR1 = 0x60;
  43         *IOP321_ICR1 = 0xE9;
  44     mdelay(1);
  45
  46         /* Send the START_MSG byte w/ no start or stop condition */
  47         *IOP321_IDBR1 = 0x0F;
  48         *IOP321_ICR1 = 0xE8;
  49     mdelay(1);
  50
  51         /* Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or stop condition */
  52         *IOP321_IDBR1 = 0x03;
  53         *IOP321_ICR1 = 0xE8;
  54     mdelay(1);
  55
  56         /* Send an ignored byte w/ stop condition */
  57         *IOP321_IDBR1 = 0x00;
  58         *IOP321_ICR1 = 0xEA;
  59
  60         while (1) ;
  61 }
  62
  63 #include <linux/init.h>
  64 #include <linux/pm.h>
  65
  66 static int __init ep80219_init(void)
  67 {
  68         pm_power_off = ep80219_power_off;
  69         return 0;
  70 }
  71 arch_initcall(ep80219_init);
  72 #endif