diff options
Diffstat (limited to 'exynos5/hal/libhdmi/libsForhdmi/libddc')
| -rw-r--r-- | exynos5/hal/libhdmi/libsForhdmi/libddc/Android.mk | 49 | ||||
| -rw-r--r-- | exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.c | 289 | ||||
| -rw-r--r-- | exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.h | 35 |
3 files changed, 373 insertions, 0 deletions
diff --git a/exynos5/hal/libhdmi/libsForhdmi/libddc/Android.mk b/exynos5/hal/libhdmi/libsForhdmi/libddc/Android.mk new file mode 100644 index 0000000..99af09b --- /dev/null +++ b/exynos5/hal/libhdmi/libsForhdmi/libddc/Android.mk @@ -0,0 +1,49 @@ +# Copyright (C) 2008 The Android Open Source Project +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +ifeq ($(BOARD_USES_HDMI),true) + +LOCAL_PATH:= $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_MODULE_TAGS := eng + +LOCAL_PRELINK_MODULE := false +LOCAL_SHARED_LIBRARIES := liblog +LOCAL_SRC_FILES := libddc.c + +LOCAL_C_INCLUDES := \ + $(LOCAL_PATH) \ + $(LOCAL_PATH)/../../../include + +ifeq ($(BOARD_HDMI_DDC_CH), DDC_CH_I2C_7) +LOCAL_CFLAGS += -DDDC_CH_I2C_7 +endif + +ifeq ($(BOARD_HDMI_DDC_CH), DDC_CH_I2C_1) +LOCAL_CFLAGS += -DDDC_CH_I2C_1 +endif + +ifeq ($(BOARD_HDMI_DDC_CH), DDC_CH_I2C_2) +LOCAL_CFLAGS += -DDDC_CH_I2C_2 +endif + +ifeq ($(BOARD_HDMI_DDC_CH), DDC_CH_I2C_8) +LOCAL_CFLAGS += -DDDC_CH_I2C_8 +endif + +LOCAL_MODULE := libddc +include $(BUILD_SHARED_LIBRARY) + +endif diff --git a/exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.c b/exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.c new file mode 100644 index 0000000..4e6e374 --- /dev/null +++ b/exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.c @@ -0,0 +1,289 @@ +/* +* Copyright@ Samsung Electronics Co. LTD +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ + +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> + +#include <linux/i2c.h> +#include <cutils/log.h> +#include "i2c-dev.h" + +#include "libddc.h" + +#define DDC_DEBUG 0 + +/** + * @brief DDC device name. + * User should change this. + */ +#ifdef DDC_CH_I2C_1 +#define DEV_NAME "/dev/i2c-1" +#endif + +#ifdef DDC_CH_I2C_2 +#define DEV_NAME "/dev/i2c-2" +#endif + +#ifdef DDC_CH_I2C_7 +#define DEV_NAME "/dev/i2c-7" +#endif + +#ifdef DDC_CH_I2C_8 +#define DEV_NAME "/dev/i2c-8" +#endif + +/** + * DDC file descriptor + */ +static int ddc_fd = -1; + +/** + * Reference count of DDC file descriptor + */ +static unsigned int ref_cnt = 0; + +/** + * Check if DDC file is already opened or not + * @return If DDC file is already opened, return 1; Otherwise, return 0. + */ +static int DDCFileAvailable() +{ + return (ddc_fd < 0) ? 0 : 1; +} + +/** + * Initialze DDC library. Open DDC device + * @return If succeed in opening DDC device or it is already opened, return 1;@n + * Otherwise, return 0. + */ +int DDCOpen() +{ + int ret = 1; + + // check already open?? + if (ref_cnt > 0) { + ref_cnt++; + return 1; + } + + // open + if ((ddc_fd = open(DEV_NAME,O_RDWR)) < 0) { + LOGE("%s: Cannot open I2C_DDC : %s",__func__, DEV_NAME); + ret = 0; + } + + ref_cnt++; + return ret; +} + +/** + * Finalize DDC library. Close DDC device + * @return If succeed in closing DDC device or it is being used yet, return 1;@n + * Otherwise, return 0. + */ +int DDCClose() +{ + int ret = 1; + // check if fd is available + if (ref_cnt == 0) { +#if DDC_DEBUG + LOGE("%s: I2C_DDC is not available!!!!", __func__); +#endif + return 1; + } + + // close + if (ref_cnt > 1) { + ref_cnt--; + return 1; + } + + if (close(ddc_fd) < 0) { +#if DDC_DEBUG + LOGE("%s: Cannot close I2C_DDC : %s",__func__,DEV_NAME); +#endif + ret = 0; + } + + ref_cnt--; + ddc_fd = -1; + + return ret; +} + +/** + * Read data though DDC. For more information of DDC, refer DDC Spec. + * @param addr [in] Device address + * @param offset [in] Byte offset + * @param size [in] Sizes of data + * @param buffer [out] Pointer to buffer to store data + * @return If succeed in reading, return 1; Otherwise, return 0. + */ +int DDCRead(unsigned char addr, unsigned char offset, + unsigned int size, unsigned char* buffer) +{ + struct i2c_rdwr_ioctl_data msgset; + struct i2c_msg msgs[2]; + int ret = 1; + + if (!DDCFileAvailable()) { +#if DDC_DEBUG + LOGE("%s: I2C_DDC is not available!!!!", __func__); +#endif + return 0; + } + + // set offset + msgs[0].addr = addr>>1; + msgs[0].flags = 0; + msgs[0].len = 1; + msgs[0].buf = &offset; + + // read data + msgs[1].addr = addr>>1; + msgs[1].flags = I2C_M_RD; + msgs[1].len = size; + msgs[1].buf = buffer; + + // set rdwr ioctl data + msgset.nmsgs = 2; + msgset.msgs = msgs; + + // i2c fast read + if ((ret = ioctl(ddc_fd, I2C_RDWR, &msgset)) < 0) { + perror("ddc error:"); + ret = 0; + } + + return ret; +} + +/** + * Read data though E-DDC. For more information of E-DDC, refer E-DDC Spec. + * @param segpointer [in] Segment pointer + * @param segment [in] Segment number + * @param addr [in] Device address + * @param offset [in] Byte offset + * @param size [in] Sizes of data + * @param buffer [out] Pointer to buffer to store data + * @return If succeed in reading, return 1; Otherwise, return 0. + */ + +int EDDCRead(unsigned char segpointer, unsigned char segment, unsigned char addr, + unsigned char offset, unsigned int size, unsigned char* buffer) +{ + struct i2c_rdwr_ioctl_data msgset; + struct i2c_msg msgs[3]; + int ret = 1; + + if (!DDCFileAvailable()) { +#if DDC_DEBUG + LOGE("%s: I2C_DDC is not available!!!!", __func__); +#endif + return 0; + } + + // set segment pointer + msgs[0].addr = segpointer>>1; + // ignore ack only if segment is "0" + if (segment == 0) + msgs[0].flags = I2C_M_IGNORE_NAK; + else + msgs[0].flags = 0; + + msgs[0].len = 1; + msgs[0].buf = &segment; + + // set offset + msgs[1].addr = addr>>1; + msgs[1].flags = 0; + msgs[1].len = 1; + msgs[1].buf = &offset; + + // read data + msgs[2].addr = addr>>1; + msgs[2].flags = I2C_M_RD; + msgs[2].len = size; + msgs[2].buf = buffer; + + msgset.nmsgs = 3; + msgset.msgs = msgs; + + // eddc read + if (ioctl(ddc_fd, I2C_RDWR, &msgset) < 0) { +#if DDC_DEBUG + LOGE("%s: ioctl(I2C_RDWR) failed!!!", __func__); +#endif + ret = 0; + } + return ret; +} + +/** + * Write data though DDC. For more information of DDC, refer DDC Spec. + * @param addr [in] Device address + * @param offset [in] Byte offset + * @param size [in] Sizes of data + * @param buffer [out] Pointer to buffer to write + * @return If succeed in writing, return 1; Otherwise, return 0. + */ +int DDCWrite(unsigned char addr, unsigned char offset, unsigned int size, unsigned char* buffer) +{ + unsigned char* temp; + int bytes; + int retval = 0; + + // allocate temporary buffer + temp = (unsigned char*) malloc((size+1)*sizeof(unsigned char)); + if (!temp) { + LOGE("%s: not enough resources at %s", __FUNCTION__); + goto exit; + } + + temp[0] = offset; + memcpy(temp+1,buffer,size); + + if (!DDCFileAvailable()) { + LOGE("%s: I2C_DDC is not available!!!!", __func__); + goto exit; + } + + if (ioctl(ddc_fd, I2C_SLAVE, addr>>1) < 0) { + LOGE("%s: cannot set slave address 0x%02x", __func__,addr); + goto exit; + } + + // write temp buffer + if ((bytes = write(ddc_fd,temp,size+1)) != (size+1)) { + LOGE("%s: fail to write %d bytes, only write %d bytes",__func__, size, bytes); + goto exit; + } + + retval = 1; + +exit: + // free temp buffer + if (temp) + free(temp); + + return retval; +} diff --git a/exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.h b/exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.h new file mode 100644 index 0000000..368855b --- /dev/null +++ b/exynos5/hal/libhdmi/libsForhdmi/libddc/libddc.h @@ -0,0 +1,35 @@ +/* + * Copyright@ Samsung Electronics Co. LTD + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef _LIBDDC_H_ +#define _LIBDDC_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +int DDCOpen(); +int DDCRead(unsigned char addr, unsigned char offset, unsigned int size, unsigned char* buffer); +int DDCWrite(unsigned char addr, unsigned char offset, unsigned int size, unsigned char* buffer); +int EDDCRead(unsigned char segpointer, unsigned char segment, unsigned char addr, + unsigned char offset, unsigned int size, unsigned char* buffer); +int DDCClose(); + +#ifdef __cplusplus +} +#endif + +#endif /* _LIBDDC_H_ */ |