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
  31 static inline void ep80219_send_to_pic(__u8 c) {
  32 }
  33
  34 void ep80219_power_off(void)
  35 {
  36         /*
  37      * This function will send a SHUTDOWN_COMPLETE message to the PIC controller
  38      * over I2C.  We are not using the i2c subsystem since we are going to power
  39      * off and it may be removed
  40      */
  41
  42         /* Send the Address byte w/ the start condition */
  43         *IOP321_IDBR1 = 0x60;
  44         *IOP321_ICR1 = 0xE9;
  45     mdelay(1);
  46
  47         /* Send the START_MSG byte w/ no start or stop condition */
  48         *IOP321_IDBR1 = 0x0F;
  49         *IOP321_ICR1 = 0xE8;
  50     mdelay(1);
  51
  52         /* Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or stop condition */
  53         *IOP321_IDBR1 = 0x03;
  54         *IOP321_ICR1 = 0xE8;
  55     mdelay(1);
  56
  57         /* Send an ignored byte w/ stop condition */
  58         *IOP321_IDBR1 = 0x00;
  59         *IOP321_ICR1 = 0xEA;
  60
  61         while (1) ;
  62 }
  63
  64 #include <linux/init.h>
  65 #include <linux/pm.h>
  66
  67 static int __init ep80219_init(void)
  68 {
  69         pm_power_off = ep80219_power_off;
  70         return 0;
  71 }
  72 arch_initcall(ep80219_init);
  73 #endif