| 1 | /* |
| 2 | * Resume reason sysfs for the Openmoko Freerunner GSM Phone |
| 3 | * |
| 4 | * (C) 2008 by Openmoko Inc. |
| 5 | * Author: Andy Green <andy@openmoko.com> |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License resume_reason 2 as |
| 10 | * published by the Free Software Foundation |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/io.h> |
| 19 | |
| 20 | #include <mach/regs-gpio.h> |
| 21 | |
| 22 | static unsigned int *gstatus4_mapped; |
| 23 | static char *resume_reasons[17] = { |
| 24 | "EINT00_ACCEL1", |
| 25 | "EINT01_GSM", |
| 26 | "EINT02_BLUETOOTH", |
| 27 | "EINT03_DEBUGBRD", |
| 28 | "EINT04_JACK", |
| 29 | "EINT05_WLAN", |
| 30 | "EINT06_AUXKEY", |
| 31 | "EINT07_HOLDKEY", |
| 32 | "EINT08_ACCEL2", |
| 33 | "EINT09_PMU", |
| 34 | "EINT10_NULL", |
| 35 | "EINT11_NULL", |
| 36 | "EINT12_GLAMO", |
| 37 | "EINT13_NULL", |
| 38 | "EINT14_NULL", |
| 39 | "EINT15_NULL", |
| 40 | NULL |
| 41 | }; |
| 42 | |
| 43 | static ssize_t resume_reason_read(struct device *dev, |
| 44 | struct device_attribute *attr, |
| 45 | char *buf) |
| 46 | { |
| 47 | int bit = 0; |
| 48 | char *end = buf; |
| 49 | |
| 50 | for (bit = 0; resume_reasons[bit]; bit++) { |
| 51 | if ((*gstatus4_mapped) & (1 << bit)) |
| 52 | end += sprintf(end, "* %s\n", resume_reasons[bit]); |
| 53 | else |
| 54 | end += sprintf(end, " %s\n", resume_reasons[bit]); |
| 55 | |
| 56 | } |
| 57 | |
| 58 | return end - buf; |
| 59 | } |
| 60 | |
| 61 | |
| 62 | static DEVICE_ATTR(resume_reason, 0644, resume_reason_read, NULL); |
| 63 | |
| 64 | static struct attribute *gta02_resume_reason_sysfs_entries[] = { |
| 65 | &dev_attr_resume_reason.attr, |
| 66 | NULL |
| 67 | }; |
| 68 | |
| 69 | static struct attribute_group gta02_resume_reason_attr_group = { |
| 70 | .name = NULL, |
| 71 | .attrs = gta02_resume_reason_sysfs_entries, |
| 72 | }; |
| 73 | |
| 74 | static int __init gta02_resume_reason_probe(struct platform_device *pdev) |
| 75 | { |
| 76 | dev_info(&pdev->dev, "starting\n"); |
| 77 | |
| 78 | gstatus4_mapped = ioremap(S3C24XX_GSTATUS4, 0x4); |
| 79 | if (!gstatus4_mapped) { |
| 80 | dev_err(&pdev->dev, "failed to ioremap() memory region\n"); |
| 81 | return -EINVAL; |
| 82 | } |
| 83 | |
| 84 | return sysfs_create_group(&pdev->dev.kobj, |
| 85 | >a02_resume_reason_attr_group); |
| 86 | } |
| 87 | |
| 88 | static int gta02_resume_reason_remove(struct platform_device *pdev) |
| 89 | { |
| 90 | sysfs_remove_group(&pdev->dev.kobj, >a02_resume_reason_attr_group); |
| 91 | iounmap(gstatus4_mapped); |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static struct platform_driver gta02_resume_reason_driver = { |
| 96 | .probe = gta02_resume_reason_probe, |
| 97 | .remove = gta02_resume_reason_remove, |
| 98 | .driver = { |
| 99 | .name = "gta02-resume-reason", |
| 100 | }, |
| 101 | }; |
| 102 | |
| 103 | static int __devinit gta02_resume_reason_init(void) |
| 104 | { |
| 105 | return platform_driver_register(>a02_resume_reason_driver); |
| 106 | } |
| 107 | |
| 108 | static void gta02_resume_reason_exit(void) |
| 109 | { |
| 110 | platform_driver_unregister(>a02_resume_reason_driver); |
| 111 | } |
| 112 | |
| 113 | module_init(gta02_resume_reason_init); |
| 114 | module_exit(gta02_resume_reason_exit); |
| 115 | |
| 116 | MODULE_LICENSE("GPL"); |
| 117 | MODULE_AUTHOR("Andy Green <andy@openmoko.com>"); |
| 118 | MODULE_DESCRIPTION("GTA02 resume_reason"); |
| 119 | |
