devices.c revision da04c52ab1036048520fca265cf02b61dca789e0
14f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* 24f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 34f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 44f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 54f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * you may not use this file except in compliance with the License. 64f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * You may obtain a copy of the License at 74f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 84f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 94f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * See the License for the specific language governing permissions and 144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * limitations under the License. 154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <errno.h> 18b93e5812faffd3b6c5fb349072413aace31918d8Olivier Bailly#include <stddef.h> 194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdio.h> 204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdlib.h> 214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/stat.h> 224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/types.h> 234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <fcntl.h> 254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <dirent.h> 264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <unistd.h> 274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <string.h> 284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/socket.h> 304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/un.h> 314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <linux/netlink.h> 324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <private/android_filesystem_config.h> 334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/time.h> 344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <asm/page.h> 35982a815c10cc28707d81c46112fc45b1c10df3beColin Cross#include <sys/wait.h> 364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 37da04c52ab1036048520fca265cf02b61dca789e0Dima Zavin#include <cutils/list.h> 383f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang#include <cutils/uevent.h> 393f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang 404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include "devices.h" 41b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross#include "util.h" 42ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "log.h" 434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define SYSFS_PREFIX "/sys" 4502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR1 "/etc/firmware" 4602863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR2 "/vendor/firmware" 474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 480dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic int device_fd = -1; 490dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross 504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct uevent { 514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *action; 524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *path; 534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *subsystem; 544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *firmware; 55b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *partition_name; 56b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int partition_num; 574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int major; 584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int minor; 594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perms_ { 624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *name; 63bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char *attr; 644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int uid; 664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid; 674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned short prefix; 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perm_node { 714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ dp; 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode plist; 734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 74bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 75fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstruct platform_node { 76fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross char *name; 77fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len; 78fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode list; 79fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross}; 80fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 81bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic list_declare(sys_perms); 8244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Crossstatic list_declare(dev_perms); 83fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic list_declare(platform_names); 844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 85bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandint add_dev_perms(const char *name, const char *attr, 86bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland mode_t perm, unsigned int uid, unsigned int gid, 87bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland unsigned short prefix) { 88bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perm_node *node = calloc(1, sizeof(*node)); 894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!node) 904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 92bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.name = strdup(name); 93bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.name) 944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 96bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) { 97bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.attr = strdup(attr); 98bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.attr) 99bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return -ENOMEM; 100bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland } 101bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.perm = perm; 1034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.uid = uid; 1044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.gid = gid; 1054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.prefix = prefix; 1064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 107bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) 108bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&sys_perms, &node->plist); 109bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland else 110bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&dev_perms, &node->plist); 111bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 1134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 115bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandvoid fixup_sys_perms(const char *upath) 1164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 117bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char buf[512]; 118bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct listnode *node; 119bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perms_ *dp; 1204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 121bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* upaths omit the "/sys" that paths in this list 122bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland * contain, so we add 4 when comparing... 123bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland */ 124bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_for_each(node, &sys_perms) { 125bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland dp = &(node_to_item(node, struct perm_node, plist))->dp; 126bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (dp->prefix) { 127bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strncmp(upath, dp->name + 4, strlen(dp->name + 4))) 1284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 130bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strcmp(upath, dp->name + 4)) 1314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 133bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 134bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf)) 135bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return; 136bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 137bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland sprintf(buf,"/sys%s/%s", upath, dp->attr); 138bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm); 139bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chown(buf, dp->uid, dp->gid); 140bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chmod(buf, dp->perm); 1414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) 1454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 14744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct listnode *node; 14844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perm_node *perm_node; 14944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perms_ *dp; 15044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 15144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* search the perms list in reverse so that ueventd.$hardware can 15244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross * override ueventd.rc 15344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross */ 15444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross list_for_each_reverse(node, &dev_perms) { 15544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross perm_node = node_to_item(node, struct perm_node, plist); 15644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross dp = &perm_node->dp; 15744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 15844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (dp->prefix) { 15944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strncmp(path, dp->name, strlen(dp->name))) 16044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 16144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross } else { 16244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strcmp(path, dp->name)) 16344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 1644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 16544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = dp->uid; 16644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = dp->gid; 16744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return dp->perm; 1684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 16944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* Default if nothing found. */ 17044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = 0; 17144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = 0; 17244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return 0600; 1734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 175bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic void make_device(const char *path, 176bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland const char *upath, 177bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland int block, int major, int minor) 1784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned uid; 1804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned gid; 1814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t mode; 1824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev_t dev; 1834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); 18517dcc5c57dcffb919f3de65ff7a0134ffa3bd874Colin Cross dev = makedev(major, minor); 1866405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly /* Temporarily change egid to avoid race condition setting the gid of the 1876405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * device node. Unforunately changing the euid would prevent creation of 1886405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * some device nodes, so the uid has to be set with chown() and is still 1896405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * racy. Fixing the gid race at least fixed the issue with system_server 1906405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * opening dynamic input devices under the AID_INPUT gid. */ 1916405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(gid); 1924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mknod(path, mode, dev); 1936405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly chown(path, uid, -1); 1946405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(AID_ROOT); 1954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 197fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void add_platform_device(const char *name) 198fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 199fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 200fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 201fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 202fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 203fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 204fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 205fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 206fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 207fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 208fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross /* subdevice of an existing platform, ignore it */ 209fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 210fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 211fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 212fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("adding platform device %s\n", name); 213fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 214fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = calloc(1, sizeof(struct platform_node)); 215fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name = strdup(name); 216fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name_len = name_len; 217fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_add_tail(&platform_names, &bus->list); 218fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 219fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 220fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross/* 221fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * given a name that may start with a platform device, find the length of the 222fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * platform device prefix. If it doesn't start with a platform device, return 223fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * 0. 224fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross */ 225fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic const char *find_platform_device(const char *name) 226fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 227fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 228fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 229fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 230fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 231fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 232fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 233fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 234fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 235fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 236fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return bus->name; 237fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 238fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 239fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return NULL; 240fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 241fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 242fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void remove_platform_device(const char *name) 243fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 244fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 245fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 246fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 247fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 248fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 249fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(name, bus->name)) { 250fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("removing platform device %s\n", name); 251fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus->name); 252fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_remove(node); 253fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus); 254fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 255fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 256fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 257fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 258fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 2591e070846f8908dff15086efa12fbba01ab7eae15Chuck Tuffli#if LOG_UEVENTS 2604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic inline suseconds_t get_usecs(void) 2624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct timeval tv; 2644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project gettimeofday(&tv, 0); 2654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec; 2664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(x...) INFO(x) 2694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#else 2714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(fmt, args...) do { } while (0) 2734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define get_usecs() 0 2744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#endif 2764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void parse_event(const char *msg, struct uevent *uevent) 2784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = ""; 2804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = ""; 2814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = ""; 2824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = ""; 2834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = -1; 2844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = -1; 285b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = NULL; 286b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = -1; 2874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* currently ignoring SEQNUM */ 2894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg) { 2904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strncmp(msg, "ACTION=", 7)) { 2914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 7; 2924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = msg; 2934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "DEVPATH=", 8)) { 2944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 8; 2954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = msg; 2964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { 2974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 10; 2984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = msg; 2994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "FIRMWARE=", 9)) { 3004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 9; 3014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = msg; 3024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MAJOR=", 6)) { 3034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = atoi(msg); 3054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MINOR=", 6)) { 3064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = atoi(msg); 308b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTN=", 6)) { 309b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 6; 310b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = atoi(msg); 311b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTNAME=", 9)) { 312b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 9; 313b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = msg; 3144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* advance to after the next \0 */ 3174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg++) 3184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ; 3194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n", 3224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action, uevent->path, uevent->subsystem, 3234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware, uevent->major, uevent->minor); 3244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 326d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobystatic char **get_character_device_symlinks(struct uevent *uevent) 327d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby{ 328d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby const char *parent; 329d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char *slash; 330d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char **links; 331d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int link_num = 0; 332d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int width; 333d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 334d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (strncmp(uevent->path, "/devices/platform/", 18)) 335d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 336d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 337d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links = malloc(sizeof(char *) * 2); 338d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!links) 339d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 340d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby memset(links, 0, sizeof(char *) * 2); 341d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 342d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip "/devices/platform/<driver>" */ 343d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby parent = strchr(uevent->path + 18, '/'); 344d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 345d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 346d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 347d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!strncmp(parent, "/usb", 4)) { 348d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip root hub name and device. use device interface */ 349d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 350d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (*parent) 351d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 352d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 353d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 354d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby slash = strchr(++parent, '/'); 355d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!slash) 356d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 357d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby width = slash - parent; 358d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (width <= 0) 359d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 360d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 361d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (asprintf(&links[link_num], "/dev/usb/%s%.*s", uevent->subsystem, width, parent) > 0) 362d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby link_num++; 363d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else 364d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links[link_num] = NULL; 365d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby mkdir("/dev/usb", 0755); 366d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 367d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else { 368d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 369d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 370d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 371d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return links; 372d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobyerr: 373d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby free(links); 374d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 375d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby} 376d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 377b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crossstatic char **parse_platform_block_device(struct uevent *uevent) 378b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross{ 379fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *device; 380b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *path; 381b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *slash; 382b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int width; 383b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char buf[256]; 384b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char link_path[256]; 385b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int fd; 386b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int link_num = 0; 387b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int ret; 388b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *p; 389b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross unsigned int size; 390b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross struct stat info; 391b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 392b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = malloc(sizeof(char *) * 4); 393b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!links) 394b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 395b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross memset(links, 0, sizeof(char *) * 4); 396b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 397b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross /* Drop "/devices/platform/" */ 398b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross path = uevent->path; 399fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = path + 18; 400fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = find_platform_device(device); 401fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!device) 402b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 403b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 404fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("found platform device %s\n", device); 405fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 406fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross snprintf(link_path, sizeof(link_path), "/dev/block/platform/%s", device); 407b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 408b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_name) { 409b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross p = strdup(uevent->partition_name); 410b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross sanitize(p); 411b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) 412b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 413b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 414b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 415b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(p); 416b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 417b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 418b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_num >= 0) { 419b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) 420b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 421b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 422b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 423b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 424b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 425b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strrchr(path, '/'); 426b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) 427b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 428b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 429b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 430b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 431b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return links; 432b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 433b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crosserr: 434b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 435b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 436b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross} 437b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 438eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device(const char *action, const char *devpath, 439eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *path, int block, int major, int minor, char **links) 4404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 441b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int i; 4424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 443eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "add")) { 444eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross make_device(devpath, path, block, major, minor); 445b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 446b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 447b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross make_link(devpath, links[i]); 448b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 451eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "remove")) { 452b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 453b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 454b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross remove_link(devpath, links[i]); 455b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unlink(devpath); 457b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 458b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 459b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 460b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 461b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links[i]); 462b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 4634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 4654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 466fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void handle_platform_device_event(struct uevent *uevent) 467fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 468fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *name = uevent->path + 18; /* length of /devices/platform/ */ 469fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 470fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(uevent->action, "add")) 471fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross add_platform_device(name); 472fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross else if (!strcmp(uevent->action, "remove")) 473fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross remove_platform_device(name); 474fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 475fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 476eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic const char *parse_device_name(struct uevent *uevent, unsigned int len) 477eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 478eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 479eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 480eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* if it's not a /dev device, nothing else to do */ 481eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if((uevent->major < 0) || (uevent->minor < 0)) 482eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 483eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 484eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* do we have a name? */ 485eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = strrchr(uevent->path, '/'); 486eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!name) 487eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 488eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name++; 489eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 490eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* too-long names would overrun our buffer */ 491eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(strlen(name) > len) 492eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 493eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 494eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return name; 495eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 496eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 497eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_block_device_event(struct uevent *uevent) 498eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 499eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *base = "/dev/block/"; 500eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 501eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96]; 502eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 503eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 504eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 505eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 506eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 507eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 508eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 509eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 510eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 511eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->path, "/devices/platform/", 18)) 512eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = parse_platform_block_device(uevent); 513eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 514eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 1, 515eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 516eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 517eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 518eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_generic_device_event(struct uevent *uevent) 519eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 520eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char *base; 521eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 522eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96] = {0}; 523eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 524eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 525eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 526eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 527eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 528eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 529eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "usb", 3)) { 530eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->subsystem, "usb")) { 531eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* This imitates the file system that would be created 532eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross * if we were using devfs instead. 533eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross * Minors are broken up into groups of 128, starting at "001" 534eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross */ 535eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross int bus_id = uevent->minor / 128 + 1; 536eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross int device_id = uevent->minor % 128 + 1; 537eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* build directories */ 538eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir("/dev/bus", 0755); 539eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir("/dev/bus/usb", 0755); 540eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id); 541eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(devpath, 0755); 542eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id); 543eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 544eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* ignore other USB events */ 545eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 546eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 547eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "graphics", 8)) { 548eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/graphics/"; 549eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 550eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { 551eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/oncrpc/"; 552eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 553eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "adsp", 4)) { 554eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/adsp/"; 555eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 556eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { 557eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/msm_camera/"; 558eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 559eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "input", 5)) { 560eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/input/"; 561eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 562eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "mtd", 3)) { 563eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/mtd/"; 564eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 565eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "sound", 5)) { 566eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/snd/"; 567eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 568eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "misc", 4) && 569eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross !strncmp(name, "log_", 4)) { 570eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/log/"; 571eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross mkdir(base, 0755); 572eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name += 4; 573eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else 574eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/"; 575eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = get_character_device_symlinks(uevent); 576eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 577eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!devpath[0]) 578eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 579eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 580eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 0, 581eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 582eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 583eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 584eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device_event(struct uevent *uevent) 585eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 586eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->action,"add")) 587eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross fixup_sys_perms(uevent->path); 588eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 589eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "block", 5)) { 590eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_block_device_event(uevent); 591fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } else if (!strncmp(uevent->subsystem, "platform", 8)) { 592fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross handle_platform_device_event(uevent); 593eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 594eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_generic_device_event(uevent); 595eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 596eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 597eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 5984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int load_firmware(int fw_fd, int loading_fd, int data_fd) 5994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct stat st; 6014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project long len_to_copy; 6024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int ret = 0; 6034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fstat(fw_fd, &st) < 0) 6054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 6064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy = st.st_size; 6074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "1", 1); /* start transfer */ 6094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (len_to_copy > 0) { 6114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buf[PAGE_SIZE]; 6124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nr; 6134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr = read(fw_fd, buf, sizeof(buf)); 6154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!nr) 6164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 6174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nr < 0) { 6184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 6194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 6204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy -= nr; 6234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (nr > 0) { 6244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nw = 0; 6254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nw = write(data_fd, buf + nw, nr); 6274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nw <= 0) { 6284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 6294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto out; 6304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr -= nw; 6324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectout: 6364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!ret) 6374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "0", 1); /* successful end of transfer */ 6384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 6394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "-1", 2); /* abort transfer */ 6404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return ret; 6424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6448d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandstatic int is_booting(void) 6458d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland{ 6468d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland return access("/dev/.booting", F_OK) == 0; 6478d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland} 6488d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland 6494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void process_firmware_event(struct uevent *uevent) 6504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 65102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland char *root, *loading, *data, *file1 = NULL, *file2 = NULL; 6524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int l, loading_fd, data_fd, fw_fd; 6538d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland int booting = is_booting(); 6544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6558d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: loading '%s' for '%s'\n", 6568d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland uevent->firmware, uevent->path); 6574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); 6594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 6604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 6614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&loading, "%sloading", root); 6634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 6644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto root_free_out; 6654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&data, "%sdata", root); 6674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 6684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_free_out; 6694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 67002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file1, FIRMWARE_DIR1"/%s", uevent->firmware); 67102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if (l == -1) 67202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_free_out; 67302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland 67402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file2, FIRMWARE_DIR2"/%s", uevent->firmware); 6754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 6764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_free_out; 6774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project loading_fd = open(loading, O_WRONLY); 6794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(loading_fd < 0) 6804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto file_free_out; 6814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project data_fd = open(data, O_WRONLY); 6834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(data_fd < 0) 6844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_close_out; 6854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6868d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandtry_loading_again: 68702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file1, O_RDONLY); 68802863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if(fw_fd < 0) { 68902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file2, O_RDONLY); 690609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby if (fw_fd < 0) { 6918d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland if (booting) { 6928d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland /* If we're not fully booted, we may be missing 6938d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland * filesystems needed for firmware, wait and retry. 6948d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland */ 6958d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland usleep(100000); 6968d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland booting = is_booting(); 6978d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland goto try_loading_again; 6988d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland } 6998d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: could not open '%s' %d\n", uevent->firmware, errno); 700609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby write(loading_fd, "-1", 2); 70102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_close_out; 702609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby } 70302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland } 7044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!load_firmware(fw_fd, loading_fd, data_fd)) 7068d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy success { '%s', '%s' }\n", root, uevent->firmware); 7074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 7088d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy failure { '%s', '%s' }\n", root, uevent->firmware); 7094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fw_fd); 7114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_close_out: 7124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(data_fd); 7134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_close_out: 7144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(loading_fd); 7154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectfile_free_out: 71602863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file1); 71702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file2); 7184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_free_out: 7194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(data); 7204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_free_out: 7214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(loading); 7224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectroot_free_out: 7234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(root); 7244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_firmware_event(struct uevent *uevent) 7274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid_t pid; 729982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int ret; 7304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->subsystem, "firmware")) 7324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->action, "add")) 7354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* we fork, to avoid making large memory allocations in init proper */ 7384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid = fork(); 7394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!pid) { 7404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project process_firmware_event(uevent); 7414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(EXIT_SUCCESS); 7424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define UEVENT_MSG_LEN 1024 7460dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid handle_device_fd() 7474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7483f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang char msg[UEVENT_MSG_LEN+2]; 7493f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang int n; 75057de8b8f27f887ca8084671df777a4ac199ba647Nick Kralevich while ((n = uevent_kernel_multicast_recv(device_fd, msg, UEVENT_MSG_LEN)) > 0) { 7515f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ 7524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 7534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n] = '\0'; 7554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n+1] = '\0'; 7564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7575f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct uevent uevent; 7584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project parse_event(msg, &uevent); 7594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_event(&uevent); 7614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_firmware_event(&uevent); 7624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Coldboot walks parts of the /sys tree and pokes the uevent files 7664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** to cause the kernel to regenerate device add events that happened 7674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** before init's device manager was started 7684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** 7694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** We drain any pending events from the netlink socket every time 7704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** we poke another uevent file to make sure we don't overrun the 7714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** socket's buffer. 7724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project*/ 7734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7740dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void do_coldboot(DIR *d) 7754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct dirent *de; 7774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int dfd, fd; 7784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dfd = dirfd(d); 7804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, "uevent", O_WRONLY); 7824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd >= 0) { 7834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(fd, "add\n", 4); 7844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 7850dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross handle_device_fd(); 7864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while((de = readdir(d))) { 7894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d2; 7904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(de->d_type != DT_DIR || de->d_name[0] == '.') 7924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 7934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 7954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 7964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 7974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project d2 = fdopendir(fd); 7994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d2 == 0) 8004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 8014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else { 8020dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d2); 8034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d2); 8044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8080dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void coldboot(const char *path) 8094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d = opendir(path); 8114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d) { 8120dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d); 8134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d); 8144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8170dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid device_init(void) 8184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project suseconds_t t0, t1; 820f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross struct stat info; 821f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross int fd; 8224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8232d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin /* is 64K enough? udev uses 16MB! */ 8242d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin device_fd = uevent_open_socket(64*1024, true); 8250dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross if(device_fd < 0) 8260dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return; 8274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8280dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFD, FD_CLOEXEC); 8290dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFL, O_NONBLOCK); 8304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 831f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross if (stat(coldboot_done, &info) < 0) { 832f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t0 = get_usecs(); 833f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/class"); 834f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/block"); 835f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/devices"); 836f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t1 = get_usecs(); 837f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000); 838f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross close(fd); 839f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); 840f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } else { 841f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("skipping coldboot, already done\n"); 842f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } 8430dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross} 8444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8450dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossint get_device_fd() 8460dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross{ 8470dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return device_fd; 8484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 849