14795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft/* 24795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * driver for powerbutton on IBM cell blades 34795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * 44795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * (C) Copyright IBM Corp. 2005-2008 54795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * 64795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * Author: Christian Krafft <krafft@de.ibm.com> 74795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * 84795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * This program is free software; you can redistribute it and/or modify 94795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * it under the terms of the GNU General Public License as published by 104795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * the Free Software Foundation; either version 2, or (at your option) 114795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * any later version. 124795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * 134795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * This program is distributed in the hope that it will be useful, 144795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * but WITHOUT ANY WARRANTY; without even the implied warranty of 154795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 164795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * GNU General Public License for more details. 174795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * 184795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * You should have received a copy of the GNU General Public License 194795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * along with this program; if not, write to the Free Software 204795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 214795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft */ 224795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 234795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft#include <linux/input.h> 247dfe293cf66258c5ef5d010f75d1f843b38e5e4aPaul Gortmaker#include <linux/module.h> 254795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft#include <linux/platform_device.h> 264795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft#include <asm/pmi.h> 274795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft#include <asm/prom.h> 284795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 294795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftstatic struct input_dev *button_dev; 304795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftstatic struct platform_device *button_pdev; 314795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 324795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftstatic void cbe_powerbutton_handle_pmi(pmi_message_t pmi_msg) 334795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft{ 344795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft BUG_ON(pmi_msg.type != PMI_TYPE_POWER_BUTTON); 354795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 364795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft input_report_key(button_dev, KEY_POWER, 1); 374795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft input_sync(button_dev); 384795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft input_report_key(button_dev, KEY_POWER, 0); 394795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft input_sync(button_dev); 404795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft} 414795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 424795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftstatic struct pmi_handler cbe_pmi_handler = { 434795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft .type = PMI_TYPE_POWER_BUTTON, 444795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft .handle_pmi_message = cbe_powerbutton_handle_pmi, 454795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft}; 464795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 474795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftstatic int __init cbe_powerbutton_init(void) 484795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft{ 494795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft int ret = 0; 504795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft struct input_dev *dev; 514795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 5271a157e8edca55198e808f8561dd49017a54ee34Grant Likely if (!of_machine_is_compatible("IBM,CBPLUS-1.0")) { 534795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft printk(KERN_ERR "%s: Not a cell blade.\n", __func__); 544795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft ret = -ENODEV; 554795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft goto out; 564795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft } 574795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 584795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft dev = input_allocate_device(); 594795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft if (!dev) { 604795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft ret = -ENOMEM; 614795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft printk(KERN_ERR "%s: Not enough memory.\n", __func__); 624795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft goto out; 634795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft } 644795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 654795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft set_bit(EV_KEY, dev->evbit); 664795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft set_bit(KEY_POWER, dev->keybit); 674795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 684795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft dev->name = "Power Button"; 694795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft dev->id.bustype = BUS_HOST; 704795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 714795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft /* this makes the button look like an acpi power button 724795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft * no clue whether anyone relies on that though */ 734795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft dev->id.product = 0x02; 744795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft dev->phys = "LNXPWRBN/button/input0"; 754795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 764795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft button_pdev = platform_device_register_simple("power_button", 0, NULL, 0); 774795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft if (IS_ERR(button_pdev)) { 784795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft ret = PTR_ERR(button_pdev); 794795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft goto out_free_input; 804795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft } 814795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 824795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft dev->dev.parent = &button_pdev->dev; 834795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft ret = input_register_device(dev); 844795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft if (ret) { 854795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft printk(KERN_ERR "%s: Failed to register device\n", __func__); 864795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft goto out_free_pdev; 874795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft } 884795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 894795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft button_dev = dev; 904795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 914795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft ret = pmi_register_handler(&cbe_pmi_handler); 924795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft if (ret) { 934795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft printk(KERN_ERR "%s: Failed to register with pmi.\n", __func__); 944795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft goto out_free_pdev; 954795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft } 964795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 974795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft goto out; 984795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 994795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftout_free_pdev: 1004795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft platform_device_unregister(button_pdev); 1014795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftout_free_input: 1024795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft input_free_device(dev); 1034795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftout: 1044795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft return ret; 1054795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft} 1064795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 1074795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftstatic void __exit cbe_powerbutton_exit(void) 1084795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft{ 1094795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft pmi_unregister_handler(&cbe_pmi_handler); 1104795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft platform_device_unregister(button_pdev); 1114795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft input_free_device(button_dev); 1124795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft} 1134795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 1144795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftmodule_init(cbe_powerbutton_init); 1154795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafftmodule_exit(cbe_powerbutton_exit); 1164795b7801b07e1b7286edb0d9321433fc0eac6ccChristian Krafft 1174795b7801b07e1b7286edb0d9321433fc0eac6ccChristian KrafftMODULE_LICENSE("GPL"); 1184795b7801b07e1b7286edb0d9321433fc0eac6ccChristian KrafftMODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>"); 119