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519 lines
17 KiB
519 lines
17 KiB
/*
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* Copyright (c) 2014, 2016, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define DEBUG 0
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#define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
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#include <cstdlib>
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#include <cutils/log.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <hardware/hdmi_cec.h>
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#include <utils/Trace.h>
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#include "qhdmi_cec.h"
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#include "QHDMIClient.h"
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namespace qhdmicec {
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const int NUM_HDMI_PORTS = 1;
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const int MAX_SYSFS_DATA = 128;
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const int MAX_CEC_FRAME_SIZE = 20;
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const int MAX_SEND_MESSAGE_RETRIES = 1;
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enum {
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LOGICAL_ADDRESS_SET = 1,
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LOGICAL_ADDRESS_UNSET = -1,
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};
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// Offsets of members of struct hdmi_cec_msg
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// drivers/video/msm/mdss/mdss_hdmi_cec.c
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// XXX: Get this from a driver header
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enum {
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CEC_OFFSET_SENDER_ID,
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CEC_OFFSET_RECEIVER_ID,
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CEC_OFFSET_OPCODE,
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CEC_OFFSET_OPERAND,
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CEC_OFFSET_FRAME_LENGTH = 17,
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CEC_OFFSET_RETRANSMIT,
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};
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//Forward declarations
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static void cec_close_context(cec_context_t* ctx __unused);
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static int cec_enable(cec_context_t *ctx, int enable);
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static int cec_is_connected(const struct hdmi_cec_device* dev, int port_id);
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static ssize_t read_node(const char *path, char *data)
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{
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ssize_t err = 0;
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FILE *fp = NULL;
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err = access(path, R_OK);
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if (!err) {
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fp = fopen(path, "r");
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if (fp) {
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err = fread(data, sizeof(char), MAX_SYSFS_DATA ,fp);
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fclose(fp);
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}
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}
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return err;
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}
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static ssize_t write_node(const char *path, const char *data, size_t len)
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{
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ssize_t err = 0;
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int fd = -1;
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err = access(path, W_OK);
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if (!err) {
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fd = open(path, O_WRONLY);
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errno = 0;
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err = write(fd, data, len);
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if (err < 0) {
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err = -errno;
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}
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close(fd);
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} else {
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ALOGE("%s: Failed to access path: %s error: %s",
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__FUNCTION__, path, strerror(errno));
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err = -errno;
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}
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return err;
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}
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// Helper function to write integer values to the full sysfs path
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static ssize_t write_int_to_node(cec_context_t *ctx,
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const char *path_postfix,
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const int value)
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{
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char sysfs_full_path[MAX_PATH_LENGTH];
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char sysfs_data[MAX_SYSFS_DATA];
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snprintf(sysfs_data, sizeof(sysfs_data), "%d",value);
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snprintf(sysfs_full_path,sizeof(sysfs_full_path), "%s/%s",
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ctx->fb_sysfs_path, path_postfix);
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ssize_t err = write_node(sysfs_full_path, sysfs_data, strlen(sysfs_data));
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return err;
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}
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static void hex_to_string(const char *msg, ssize_t len, char *str)
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{
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//Functions assumes sufficient memory in str
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char *ptr = str;
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for(int i=0; i < len ; i++) {
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ptr += snprintf(ptr, 3, "%02X", msg[i]);
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// Overwrite null termination of snprintf in all except the last byte
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if (i < len - 1)
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*ptr = ':';
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ptr++;
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}
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}
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static ssize_t cec_get_fb_node_number(cec_context_t *ctx)
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{
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//XXX: Do this from a common utility library across the display HALs
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const int MAX_FB_DEVICES = 2;
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ssize_t len = 0;
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char fb_type_path[MAX_PATH_LENGTH];
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char fb_type[MAX_SYSFS_DATA];
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const char *dtv_panel_str = "dtv panel";
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for(int num = 0; num < MAX_FB_DEVICES; num++) {
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snprintf(fb_type_path, sizeof(fb_type_path),"%s%d/msm_fb_type",
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SYSFS_BASE,num);
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ALOGD_IF(DEBUG, "%s: num: %d fb_type_path: %s", __FUNCTION__, num, fb_type_path);
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len = read_node(fb_type_path, fb_type);
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ALOGD_IF(DEBUG, "%s: fb_type:%s", __FUNCTION__, fb_type);
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if(len > 0 && (strncmp(fb_type, dtv_panel_str, strlen(dtv_panel_str)) == 0)){
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ALOGD_IF(DEBUG, "%s: Found DTV panel at fb%d", __FUNCTION__, num);
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ctx->fb_num = num;
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snprintf(ctx->fb_sysfs_path, sizeof(ctx->fb_sysfs_path),
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"%s%d", SYSFS_BASE, num);
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break;
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}
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}
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if (len < 0)
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return len;
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else
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return 0;
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}
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static int cec_add_logical_address(const struct hdmi_cec_device* dev,
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cec_logical_address_t addr)
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{
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if (addr < CEC_ADDR_TV || addr > CEC_ADDR_BROADCAST) {
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ALOGE("%s: Received invalid address: %d ", __FUNCTION__, addr);
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return -EINVAL;
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}
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cec_context_t* ctx = (cec_context_t*)(dev);
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ctx->logical_address[addr] = LOGICAL_ADDRESS_SET;
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//XXX: We can get multiple logical addresses here but we can only send one
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//to the driver. Store locally for now
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ssize_t err = write_int_to_node(ctx, "cec/logical_addr", addr);
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ALOGI("%s: Allocated logical address: %d ", __FUNCTION__, addr);
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return (int) err;
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}
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static void cec_clear_logical_address(const struct hdmi_cec_device* dev)
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{
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cec_context_t* ctx = (cec_context_t*)(dev);
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memset(ctx->logical_address, LOGICAL_ADDRESS_UNSET,
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sizeof(ctx->logical_address));
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//XXX: Find logical_addr that needs to be reset
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write_int_to_node(ctx, "cec/logical_addr", 15);
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ALOGD_IF(DEBUG, "%s: Cleared logical addresses", __FUNCTION__);
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}
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static int cec_get_physical_address(const struct hdmi_cec_device* dev,
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uint16_t* addr)
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{
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cec_context_t* ctx = (cec_context_t*)(dev);
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char pa_path[MAX_PATH_LENGTH];
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char pa_data[MAX_SYSFS_DATA];
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snprintf (pa_path, sizeof(pa_path),"%s/pa",
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ctx->fb_sysfs_path);
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int err = (int) read_node(pa_path, pa_data);
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*addr = (uint16_t) atoi(pa_data);
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ALOGD_IF(DEBUG, "%s: Physical Address: 0x%x", __FUNCTION__, *addr);
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if (err < 0)
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return err;
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else
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return 0;
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}
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static int cec_send_message(const struct hdmi_cec_device* dev,
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const cec_message_t* msg)
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{
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ATRACE_CALL();
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if(cec_is_connected(dev, 0) <= 0)
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return HDMI_RESULT_FAIL;
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cec_context_t* ctx = (cec_context_t*)(dev);
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ALOGD_IF(DEBUG, "%s: initiator: %d destination: %d length: %u",
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__FUNCTION__, msg->initiator, msg->destination,
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(uint32_t) msg->length);
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// Dump message received from framework
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char dump[128];
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if(msg->length > 0) {
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hex_to_string((char*)msg->body, msg->length, dump);
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ALOGD_IF(DEBUG, "%s: message from framework: %s", __FUNCTION__, dump);
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}
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char write_msg_path[MAX_PATH_LENGTH];
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char write_msg[MAX_CEC_FRAME_SIZE];
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memset(write_msg, 0, sizeof(write_msg));
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// See definition of struct hdmi_cec_msg in driver code
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// drivers/video/msm/mdss/mdss_hdmi_cec.c
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// Write header block
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// XXX: Include this from header in kernel
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write_msg[CEC_OFFSET_SENDER_ID] = msg->initiator;
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write_msg[CEC_OFFSET_RECEIVER_ID] = msg->destination;
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//Kernel splits opcode/operand, but Android sends it in one byte array
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write_msg[CEC_OFFSET_OPCODE] = msg->body[0];
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if(msg->length > 1) {
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memcpy(&write_msg[CEC_OFFSET_OPERAND], &msg->body[1],
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sizeof(char)*(msg->length - 1));
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}
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//msg length + initiator + destination
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write_msg[CEC_OFFSET_FRAME_LENGTH] = (unsigned char) (msg->length + 1);
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hex_to_string(write_msg, sizeof(write_msg), dump);
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ALOGD_IF(DEBUG, "%s: message to driver: %s", __FUNCTION__, dump);
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snprintf(write_msg_path, sizeof(write_msg_path), "%s/cec/wr_msg",
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ctx->fb_sysfs_path);
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int retry_count = 0;
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ssize_t err = 0;
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//HAL spec requires us to retry at least once.
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while (true) {
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err = write_node(write_msg_path, write_msg, sizeof(write_msg));
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retry_count++;
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if (err == -EAGAIN && retry_count <= MAX_SEND_MESSAGE_RETRIES) {
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ALOGE("%s: CEC line busy, retrying", __FUNCTION__);
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} else {
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break;
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}
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}
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if (err < 0) {
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if (err == -ENXIO) {
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ALOGI("%s: No device exists with the destination address",
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__FUNCTION__);
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return HDMI_RESULT_NACK;
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} else if (err == -EAGAIN) {
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ALOGE("%s: CEC line is busy, max retry count exceeded",
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__FUNCTION__);
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return HDMI_RESULT_BUSY;
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} else {
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return HDMI_RESULT_FAIL;
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ALOGE("%s: Failed to send CEC message err: %zd - %s",
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__FUNCTION__, err, strerror(int(-err)));
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}
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} else {
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ALOGD_IF(DEBUG, "%s: Sent CEC message - %zd bytes written",
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__FUNCTION__, err);
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return HDMI_RESULT_SUCCESS;
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}
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}
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void cec_receive_message(cec_context_t *ctx, char *msg, ssize_t len)
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{
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if(!ctx->system_control)
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return;
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char dump[128];
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if(len > 0) {
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hex_to_string(msg, len, dump);
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ALOGD_IF(DEBUG, "%s: Message from driver: %s", __FUNCTION__, dump);
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}
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hdmi_event_t event;
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event.type = HDMI_EVENT_CEC_MESSAGE;
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event.dev = (hdmi_cec_device *) ctx;
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// Remove initiator/destination from this calculation
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event.cec.length = msg[CEC_OFFSET_FRAME_LENGTH] - 1;
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event.cec.initiator = (cec_logical_address_t) msg[CEC_OFFSET_SENDER_ID];
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event.cec.destination = (cec_logical_address_t) msg[CEC_OFFSET_RECEIVER_ID];
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//Copy opcode and operand
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memcpy(event.cec.body, &msg[CEC_OFFSET_OPCODE], event.cec.length);
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hex_to_string((char *) event.cec.body, event.cec.length, dump);
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ALOGD_IF(DEBUG, "%s: Message to framework: %s", __FUNCTION__, dump);
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ctx->callback.callback_func(&event, ctx->callback.callback_arg);
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}
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void cec_hdmi_hotplug(cec_context_t *ctx, int connected)
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{
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//Ignore unplug events when system control is disabled
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if(!ctx->system_control && connected == 0)
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return;
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hdmi_event_t event;
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event.type = HDMI_EVENT_HOT_PLUG;
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event.dev = (hdmi_cec_device *) ctx;
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event.hotplug.connected = connected ? HDMI_CONNECTED : HDMI_NOT_CONNECTED;
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ctx->callback.callback_func(&event, ctx->callback.callback_arg);
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}
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static void cec_register_event_callback(const struct hdmi_cec_device* dev,
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event_callback_t callback, void* arg)
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{
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ALOGD_IF(DEBUG, "%s: Registering callback", __FUNCTION__);
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cec_context_t* ctx = (cec_context_t*)(dev);
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ctx->callback.callback_func = callback;
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ctx->callback.callback_arg = arg;
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}
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static void cec_get_version(const struct hdmi_cec_device* dev, int* version)
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{
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cec_context_t* ctx = (cec_context_t*)(dev);
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*version = ctx->version;
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ALOGD_IF(DEBUG, "%s: version: %d", __FUNCTION__, *version);
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}
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static void cec_get_vendor_id(const struct hdmi_cec_device* dev,
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uint32_t* vendor_id)
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{
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cec_context_t* ctx = (cec_context_t*)(dev);
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*vendor_id = ctx->vendor_id;
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ALOGD_IF(DEBUG, "%s: vendor id: %u", __FUNCTION__, *vendor_id);
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}
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static void cec_get_port_info(const struct hdmi_cec_device* dev,
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struct hdmi_port_info* list[], int* total)
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{
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ALOGD_IF(DEBUG, "%s: Get port info", __FUNCTION__);
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cec_context_t* ctx = (cec_context_t*)(dev);
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*total = NUM_HDMI_PORTS;
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*list = ctx->port_info;
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}
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static void cec_set_option(const struct hdmi_cec_device* dev, int flag,
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int value)
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{
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cec_context_t* ctx = (cec_context_t*)(dev);
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switch (flag) {
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case HDMI_OPTION_WAKEUP:
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ALOGD_IF(DEBUG, "%s: Wakeup: value: %d", __FUNCTION__, value);
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//XXX
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break;
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case HDMI_OPTION_ENABLE_CEC:
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ALOGD_IF(DEBUG, "%s: Enable CEC: value: %d", __FUNCTION__, value);
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cec_enable(ctx, value? 1 : 0);
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break;
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case HDMI_OPTION_SYSTEM_CEC_CONTROL:
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ALOGD_IF(DEBUG, "%s: system_control: value: %d",
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__FUNCTION__, value);
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ctx->system_control = !!value;
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break;
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}
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}
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static void cec_set_audio_return_channel(const struct hdmi_cec_device* dev,
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int port, int flag)
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{
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cec_context_t* ctx = (cec_context_t*)(dev);
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ctx->arc_enabled = flag ? true : false;
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ALOGD_IF(DEBUG, "%s: ARC flag: %d port: %d", __FUNCTION__, flag, port);
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}
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static int cec_is_connected(const struct hdmi_cec_device* dev, int port_id)
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{
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// Ignore port_id since we have only one port
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int connected = 0;
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cec_context_t* ctx = (cec_context_t*)(dev);
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char connected_path[MAX_PATH_LENGTH];
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char connected_data[MAX_SYSFS_DATA];
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snprintf (connected_path, sizeof(connected_path),"%s/connected",
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ctx->fb_sysfs_path);
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ssize_t err = read_node(connected_path, connected_data);
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connected = atoi(connected_data);
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ALOGD_IF(DEBUG, "%s: HDMI at port %d is - %s", __FUNCTION__, port_id,
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connected ? "connected":"disconnected");
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if (err < 0)
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return (int) err;
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else
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return connected;
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}
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static int cec_device_close(struct hw_device_t *dev)
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{
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ALOGD_IF(DEBUG, "%s: Close CEC HAL ", __FUNCTION__);
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if (!dev) {
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ALOGE("%s: NULL device pointer", __FUNCTION__);
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return -EINVAL;
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}
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cec_context_t* ctx = (cec_context_t*)(dev);
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cec_close_context(ctx);
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free(dev);
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return 0;
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}
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static int cec_enable(cec_context_t *ctx, int enable)
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{
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ssize_t err;
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// Enable CEC
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int value = enable ? 0x3 : 0x0;
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err = write_int_to_node(ctx, "cec/enable", value);
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if(err < 0) {
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ALOGE("%s: Failed to toggle CEC: enable: %d",
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__FUNCTION__, enable);
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return (int) err;
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}
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ctx->enabled = enable;
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return 0;
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}
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static void cec_init_context(cec_context_t *ctx)
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{
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ALOGD_IF(DEBUG, "%s: Initializing context", __FUNCTION__);
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cec_get_fb_node_number(ctx);
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//Initialize ports - We support only one output port
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ctx->port_info = new hdmi_port_info[NUM_HDMI_PORTS];
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ctx->port_info[0].type = HDMI_OUTPUT;
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ctx->port_info[0].port_id = 1;
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ctx->port_info[0].cec_supported = 1;
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//XXX: Enable ARC if supported
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ctx->port_info[0].arc_supported = 0;
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cec_get_physical_address((hdmi_cec_device *) ctx,
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&ctx->port_info[0].physical_address );
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ctx->version = 0x4;
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ctx->vendor_id = 0xA47733;
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cec_clear_logical_address((hdmi_cec_device_t*)ctx);
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//Set up listener for HDMI events
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ctx->disp_client = new qClient::QHDMIClient();
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ctx->disp_client->setCECContext(ctx);
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ctx->disp_client->registerClient(ctx->disp_client);
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//Enable CEC - framework expects it to be enabled by default
|
|
cec_enable(ctx, true);
|
|
|
|
ALOGD("%s: CEC enabled", __FUNCTION__);
|
|
}
|
|
|
|
static void cec_close_context(cec_context_t* ctx __unused)
|
|
{
|
|
ALOGD("%s: Closing context", __FUNCTION__);
|
|
}
|
|
|
|
static int cec_device_open(const struct hw_module_t* module,
|
|
const char* name,
|
|
struct hw_device_t** device)
|
|
{
|
|
ALOGD_IF(DEBUG, "%s: name: %s", __FUNCTION__, name);
|
|
int status = -EINVAL;
|
|
if (!strcmp(name, HDMI_CEC_HARDWARE_INTERFACE )) {
|
|
struct cec_context_t *dev;
|
|
dev = (cec_context_t *) calloc (1, sizeof(*dev));
|
|
if (dev) {
|
|
cec_init_context(dev);
|
|
|
|
//Setup CEC methods
|
|
dev->device.common.tag = HARDWARE_DEVICE_TAG;
|
|
dev->device.common.version = HDMI_CEC_DEVICE_API_VERSION_1_0;
|
|
dev->device.common.module = const_cast<hw_module_t* >(module);
|
|
dev->device.common.close = cec_device_close;
|
|
dev->device.add_logical_address = cec_add_logical_address;
|
|
dev->device.clear_logical_address = cec_clear_logical_address;
|
|
dev->device.get_physical_address = cec_get_physical_address;
|
|
dev->device.send_message = cec_send_message;
|
|
dev->device.register_event_callback = cec_register_event_callback;
|
|
dev->device.get_version = cec_get_version;
|
|
dev->device.get_vendor_id = cec_get_vendor_id;
|
|
dev->device.get_port_info = cec_get_port_info;
|
|
dev->device.set_option = cec_set_option;
|
|
dev->device.set_audio_return_channel = cec_set_audio_return_channel;
|
|
dev->device.is_connected = cec_is_connected;
|
|
|
|
*device = &dev->device.common;
|
|
status = 0;
|
|
} else {
|
|
status = -EINVAL;
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
}; //namespace qhdmicec
|
|
|
|
// Standard HAL module, should be outside qhdmicec namespace
|
|
static struct hw_module_methods_t cec_module_methods = {
|
|
.open = qhdmicec::cec_device_open
|
|
};
|
|
|
|
hdmi_module_t HAL_MODULE_INFO_SYM = {
|
|
.common = {
|
|
.tag = HARDWARE_MODULE_TAG,
|
|
.version_major = 1,
|
|
.version_minor = 0,
|
|
.id = HDMI_CEC_HARDWARE_MODULE_ID,
|
|
.name = "QTI HDMI CEC module",
|
|
.author = "The Linux Foundation",
|
|
.methods = &cec_module_methods,
|
|
}
|
|
};
|
|
|
|
|