277 lines
6.4 KiB
C
277 lines
6.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#if defined(MTK_LCM_DEVICE_TREE_SUPPORT)
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#ifndef BUILD_LK
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/i2c.h>
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#include <linux/i2c-dev.h>
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#include <linux/irq.h>
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#include <linux/uaccess.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/string.h>
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#include <linux/wait.h>
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#endif
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#ifdef BUILD_LK
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#include <platform/upmu_common.h>
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#include <platform/upmu_hw.h>
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#include <platform/mt_gpio.h>
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#include <platform/mt_i2c.h>
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#include <platform/mt_pmic.h>
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#include <string.h>
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#else
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#ifdef CONFIG_MTK_LEGACY
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#include <mach/mt_pm_ldo.h> /* hwPowerOn */
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#include <mt-plat/upmu_common.h>
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#include <mach/upmu_sw.h>
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#include <mach/upmu_hw.h>
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#endif
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#endif
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#ifdef CONFIG_MTK_LEGACY
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#include <mach/mt_gpio.h>
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#include <cust_gpio_usage.h>
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#include <cust_i2c.h>
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#endif
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#include "lcm_define.h"
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#include "lcm_drv.h"
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#include "lcm_i2c.h"
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/*****************************************************************************
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* Define
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*****************************************************************************/
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#ifndef CONFIG_FPGA_EARLY_PORTING
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#ifdef CONFIG_MTK_LEGACY
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#define LCM_I2C_ADDR 0x3E
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#define LCM_I2C_BUSNUM I2C_I2C_LCD_BIAS_CHANNEL /* for I2C channel 0 */
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#define LCM_I2C_ID_NAME "tps65132"
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#else
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#define LCM_I2C_ADDR 0x3E
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#define LCM_I2C_BUSNUM 1 /* for I2C channel 0 */
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#define LCM_I2C_ID_NAME "I2C_LCD_BIAS"
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#endif
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/*****************************************************************************
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* GLobal Variable
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*****************************************************************************/
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#ifdef CONFIG_MTK_LEGACY
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static struct i2c_board_info _lcm_i2c_board_info __initdata = {
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I2C_BOARD_INFO(LCM_I2C_ID_NAME, LCM_I2C_ADDR)
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};
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#else
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static const struct of_device_id _lcm_i2c_of_match[] = {
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{ .compatible = "mediatek,I2C_LCD_BIAS", },
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{},
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};
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#endif
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static struct i2c_client *_lcm_i2c_client;
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/*****************************************************************************
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* Function Prototype
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*****************************************************************************/
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static int _lcm_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int _lcm_i2c_remove(struct i2c_client *client);
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/*****************************************************************************
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* Data Structure
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*****************************************************************************/
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struct _lcm_i2c_dev {
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struct i2c_client *client;
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};
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static const struct i2c_device_id _lcm_i2c_id[] = {
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{LCM_I2C_ID_NAME, 0},
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{}
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};
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/* #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)) */
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/* static struct i2c_client_address_data addr_data = { .forces = forces,}; */
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/* #endif */
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static struct i2c_driver _lcm_i2c_driver = {
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.id_table = _lcm_i2c_id,
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.probe = _lcm_i2c_probe,
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.remove = _lcm_i2c_remove,
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/* .detect = _lcm_i2c_detect, */
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.driver = {
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.owner = THIS_MODULE,
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.name = LCM_I2C_ID_NAME,
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#ifdef CONFIG_MTK_LEGACY
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#else
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.of_match_table = _lcm_i2c_of_match,
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#endif
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},
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};
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/*****************************************************************************
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* Extern Area
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*****************************************************************************/
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/*****************************************************************************
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* Function
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*****************************************************************************/
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static int _lcm_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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pr_debug("[LCM][I2C] %s\n", __func__);
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pr_debug("[LCM][I2C] NT: info==>name=%s addr=0x%x\n",
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client->name, client->addr);
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_lcm_i2c_client = client;
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return 0;
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}
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static int _lcm_i2c_remove(struct i2c_client *client)
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{
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pr_debug("[LCM][I2C] %s\n", __func__);
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_lcm_i2c_client = NULL;
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i2c_unregister_device(client);
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return 0;
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}
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static int _lcm_i2c_write_bytes(unsigned char addr, unsigned char value)
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{
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int ret = 0;
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struct i2c_client *client = _lcm_i2c_client;
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char write_data[2] = { 0 };
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if (client == NULL) {
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pr_debug("ERROR!! _lcm_i2c_client is null\n");
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return 0;
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}
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write_data[0] = addr;
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write_data[1] = value;
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ret = i2c_master_send(client, write_data, 2);
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if (ret < 0)
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pr_info("[LCM][ERROR] _lcm_i2c write data fail !!\n");
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return ret;
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}
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/*
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* module load/unload record keeping
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*/
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static int __init _lcm_i2c_init(void)
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{
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pr_debug("[LCM][I2C] %s\n", __func__);
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#ifdef CONFIG_MTK_LEGACY
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i2c_register_board_info(LCM_I2C_BUSNUM, &_lcm_i2c_board_info, 1);
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pr_debug("[LCM][I2C] _lcm_i2c_init2\n");
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#endif
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i2c_add_driver(&_lcm_i2c_driver);
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pr_debug("[LCM][I2C] %s success\n", __func__);
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return 0;
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}
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static void __exit _lcm_i2c_exit(void)
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{
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pr_debug("[LCM][I2C] %s\n", __func__);
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i2c_del_driver(&_lcm_i2c_driver);
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}
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static enum LCM_STATUS _lcm_i2c_check_data(char type,
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const struct LCM_DATA_T2 *t2)
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{
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switch (type) {
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case LCM_I2C_WRITE:
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if (t2->cmd > 0xFF) {
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pr_info("[LCM][ERROR] %s/%d: %d\n",
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__func__, __LINE__, t2->cmd);
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return LCM_STATUS_ERROR;
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}
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if (t2->data > 0xFF) {
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pr_info("[LCM][ERROR] %s/%d: %d\n",
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__func__, __LINE__, t2->data);
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return LCM_STATUS_ERROR;
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}
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break;
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default:
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pr_info("[LCM][ERROR] %s/%d: %d\n", __func__, __LINE__, type);
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return LCM_STATUS_ERROR;
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}
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return LCM_STATUS_OK;
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}
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#endif
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enum LCM_STATUS lcm_i2c_set_data(char type, const struct LCM_DATA_T2 *t2)
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{
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#ifndef CONFIG_FPGA_EARLY_PORTING
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unsigned int ret_code = 0;
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/* check parameter is valid */
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if (_lcm_i2c_check_data(type, t2) == LCM_STATUS_OK) {
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switch (type) {
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case LCM_I2C_WRITE:
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pr_debug("[LCM][I2C] %s/%d: %d, 0x%x, 0x%x\n",
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__func__, __LINE__, type, t2->cmd, t2->data);
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ret_code =
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_lcm_i2c_write_bytes((unsigned char)t2->cmd,
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(unsigned char)t2->data);
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break;
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default:
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pr_info("[LCM][ERROR] %s/%d: %d\n",
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__func__, __LINE__, type);
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return LCM_STATUS_ERROR;
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}
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} else {
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pr_info("[LCM][ERROR] %s/%d: %d, 0x%x, 0x%x\n",
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__func__, __LINE__, type, t2->cmd, t2->data);
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return LCM_STATUS_ERROR;
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}
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if (ret_code < 0) {
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pr_info("[LCM][ERROR] %s/%d: 0x%x, 0x%x, %d\n",
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__func__, __LINE__, (unsigned int)t2->cmd,
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(unsigned int)t2->data, ret_code);
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return LCM_STATUS_ERROR;
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}
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#endif
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return LCM_STATUS_OK;
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}
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#ifndef CONFIG_FPGA_EARLY_PORTING
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module_init(_lcm_i2c_init);
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module_exit(_lcm_i2c_exit);
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MODULE_AUTHOR("Joey Pan");
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MODULE_DESCRIPTION("MTK LCM I2C Driver");
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MODULE_LICENSE("GPL");
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#endif
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#else
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struct i2c_client *_lcm_i2c_client;
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#endif
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