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/config.h>
  16 #include <linux/delay.h>
  17 #include <asm/hardware.h>
  18
  19 /*
  20  * Shared variables
  21  */
  22 unsigned long iop3xx_pcibios_min_io = 0;
  23 unsigned long iop3xx_pcibios_min_mem = 0;
  24
  25 #ifdef CONFIG_ARCH_EP80219
  26 #include <linux/kernel.h>
  27 /*
  28  * Default power-off for EP80219
  29  */
  30 #include <asm/mach-types.h>
  31 #include <asm/hardware.h>
  32
  33 static inline void ep80219_send_to_pic(__u8 c) {
  34 }
  35
  36 void ep80219_power_off(void)
  37 {
  38         /*
  39      * This function will send a SHUTDOWN_COMPLETE message to the PIC controller
  40      * over I2C.  We are not using the i2c subsystem since we are going to power
  41      * off and it may be removed
  42      */
  43
  44         /* Send the Address byte w/ the start condition */
  45         *IOP321_IDBR1 = 0x60;
  46         *IOP321_ICR1 = 0xE9;
  47     mdelay(1);
  48
  49         /* Send the START_MSG byte w/ no start or stop condition */
  50         *IOP321_IDBR1 = 0x0F;
  51         *IOP321_ICR1 = 0xE8;
  52     mdelay(1);
  53
  54         /* Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or stop condition */
  55         *IOP321_IDBR1 = 0x03;
  56         *IOP321_ICR1 = 0xE8;
  57     mdelay(1);
  58
  59         /* Send an ignored byte w/ stop condition */
  60         *IOP321_IDBR1 = 0x00;
  61         *IOP321_ICR1 = 0xEA;
  62
  63         while (1) ;
  64 }
  65
  66 #include <linux/init.h>
  67 #include <linux/pm.h>
  68
  69 static int __init ep80219_init(void)
  70 {
  71         pm_power_off = ep80219_power_off;
  72         return 0;
  73 }
  74 arch_initcall(ep80219_init);
  75 #endif