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-rw-r--r--init/init_msm.cpp265
1 files changed, 265 insertions, 0 deletions
diff --git a/init/init_msm.cpp b/init/init_msm.cpp
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+++ b/init/init_msm.cpp
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+/*
+ Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following
+ disclaimer in the documentation and/or other materials provided
+ with the distribution.
+ * Neither the name of The Linux Foundation nor the names of its
+ contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <private/android_filesystem_config.h>
+
+#include "vendor_init.h"
+#include "property_service.h"
+#include "log.h"
+#include "util.h"
+
+#include "init_msm.h"
+
+#include <sys/resource.h>
+
+#define SOC_ID_PATH1 "/sys/devices/soc0/soc_id"
+#define SOC_ID_PATH2 "/sys/devices/system/soc/soc0/id"
+#define SOC_VER_PATH1 "/sys/devices/soc0/platform_version"
+#define SOC_VER_PATH2 "/sys/devices/system/soc/soc0/platform_version"
+#define BOARD_TYPE_PATH1 "/sys/devices/soc0/hw_platform"
+#define BOARD_TYPE_PATH2 "/sys/devices/system/soc/soc0/hw_platform"
+
+#define BUF_SIZE 64
+#define STRCONV_(x) #x
+#define STRCONV(x) "%" STRCONV_(x) "s"
+
+static unsigned long msm_id;
+static unsigned long msm_ver;
+static char board_type[BUF_SIZE];
+static char tmp[BUF_SIZE];
+
+// sys and dev fb paths
+char sys_fb_path[] = "/sys/class/graphics/";
+char dev_fb_path[] = "/dev/graphics/";
+#define DEV_GFX_HDMI "/dev/graphics/hdmi"
+
+__attribute__ ((weak))
+void init_msm_properties(unsigned long soc, unsigned long socrev, char *board)
+{
+ UNUSED(soc);
+ UNUSED(socrev);
+ UNUSED(board);
+}
+
+int read_file2(const char *fname, char *data, int max_size)
+{
+ int fd, rc;
+
+ if (max_size < 1)
+ return 0;
+
+ fd = open(fname, O_RDONLY);
+ if (fd < 0) {
+ ERROR("failed to open '%s'\n", fname);
+ return 0;
+ }
+
+ rc = read(fd, data, max_size - 1);
+ if ((rc > 0) && (rc < max_size))
+ data[rc] = '\0';
+ else
+ data[0] = '\0';
+ close(fd);
+
+ return 1;
+}
+
+/*
+ * setPerms: sets the permission to the file node
+ * @path: file node
+ * @mode: permissions to be set(0664)
+ */
+void setPerms(char *path, uint32_t mode)
+{
+ // set the permission if the file exists
+ int fd = open(path, O_RDONLY | O_NOFOLLOW);
+ if (fd >= 0) {
+ if (fchmod(fd, mode) < 0)
+ ERROR("chmod failed for %s: errno = %d", path, errno);
+ close(fd);
+ }
+}
+
+/*
+ * setOwners: sets the owner and group for a file node
+ * @path: file node
+ * @owner: AID for owner
+ * @group: AID for group
+ */
+void setOwners(char *path, int owner, int group)
+{
+ // set the permissinn if the file exists
+ int fd = open(path, O_RDONLY | O_NOFOLLOW);
+ if (fd >= 0) {
+ if (fchown(fd, owner, group) < 0)
+ ERROR(" chown failed for %s: errno = %d", path, errno);
+ close(fd);
+ }
+}
+
+/*
+ * Setup Display related nodes & permissions. For HDMI, it can be fb1 or fb2
+ * Loop through the sysfs nodes and determine the HDMI(dtv panel)
+ */
+void set_display_node_perms()
+{
+ char panel_type[] = "dtv panel";
+ char buf[BUF_SIZE];
+ int num;
+
+ for (num=0; num<=2; num++) {
+ snprintf(tmp,sizeof(tmp),"%sfb%d/msm_fb_type", sys_fb_path, num);
+ if(read_file2(tmp, buf, sizeof(buf))) {
+ if(!strncmp(buf, panel_type, strlen(panel_type))) {
+ // Set appropriate permissions for the nodes
+ snprintf(tmp, sizeof(tmp), "%sfb%d/hpd", sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/res_info", sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/vendor_name", sys_fb_path,
+ num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/product_description",
+ sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/video_mode",
+ sys_fb_path, num);
+ setPerms(tmp, 0664);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/format_3d", sys_fb_path,
+ num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/s3d_mode", sys_fb_path,
+ num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/hdcp/tp", sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/cec/enable", sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/cec/logical_addr", sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/cec/rd_msg", sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/pa", sys_fb_path, num);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d/cec/wr_msg", sys_fb_path, num);
+ setPerms(tmp, 0600);
+ setOwners(tmp, AID_SYSTEM, AID_SYSTEM);
+ snprintf(tmp, sizeof(tmp), "%sfb%d", dev_fb_path, num);
+ symlink(tmp, DEV_GFX_HDMI);
+ break;
+ }
+ }
+ }
+ // Set the permission for idle_time.
+ snprintf(tmp, sizeof(tmp), "%sfb0/idle_time", sys_fb_path);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+
+ // Set the permission for mdp/bw_mode_bitmap.
+ snprintf(tmp, sizeof(tmp), "%sfb0/mdp/bw_mode_bitmap", sys_fb_path);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+
+ // Set write permission for dynamic_fps node.
+ snprintf(tmp, sizeof(tmp), "%sfb0/dynamic_fps", sys_fb_path);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+ // Set permissions for dynamic partial update
+ snprintf(tmp, sizeof(tmp), "%sfb0/dyn_pu", sys_fb_path);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+
+ snprintf(tmp, sizeof(tmp), "%sfb0/modes", sys_fb_path);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+
+ snprintf(tmp, sizeof(tmp), "%sfb0/mode", sys_fb_path);
+ setPerms(tmp, 0664);
+ setOwners(tmp, AID_SYSTEM, AID_GRAPHICS);
+}
+
+void vendor_load_properties()
+{
+ int rc;
+
+ /* Collect MSM info */
+ rc = read_file2(SOC_ID_PATH1, tmp, sizeof(tmp));
+ if (!rc) {
+ rc = read_file2(SOC_ID_PATH2, tmp, sizeof(tmp));
+ }
+ if (rc) {
+ msm_id = strtoul(tmp, NULL, 0);
+ }
+ rc = read_file2(SOC_VER_PATH1, tmp, sizeof(tmp));
+ if (!rc) {
+ rc = read_file2(SOC_VER_PATH2, tmp, sizeof(tmp));
+ }
+ if (rc) {
+ msm_ver = strtoul(tmp, NULL, 0);
+ }
+ rc = read_file2(BOARD_TYPE_PATH1, tmp, sizeof(tmp));
+ if (!rc) {
+ rc = read_file2(BOARD_TYPE_PATH2, tmp, sizeof(tmp));
+ }
+ if (rc) {
+ sscanf(tmp, STRCONV(BUF_SIZE), board_type);
+ }
+ if (!msm_id) {
+ /* abort */
+ ERROR("MSM SOC detection failed, skipping MSM initialization\n");
+ return;
+ }
+
+ ERROR("Detected MSM SOC ID=%lu SOC VER=%lu BOARD TYPE=%s\n",
+ msm_id, msm_ver, board_type);
+
+ /* Define MSM family properties */
+ init_msm_properties(msm_id, msm_ver, board_type);
+
+ /* Set Display Node Permissions */
+ set_display_node_perms();
+}
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