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/*
* pi5usb30216d.c
*
* Drivers for usb type-C interface's CC-Logic chip of Pericom
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/gpio.h>
#include <linux/miscdevice.h>
#include <linux/regulator/consumer.h>
#include <linux/of_gpio.h>
#include <linux/wakelock.h>
#include "cclogic-core.h"
#define DRIVER_NAME "pericom,pi5usb30216d"
/*
* pi5usb30216d_write_i2c()
* only modified 0x2 register value.
*/
static int pi5usb30216d_write_i2c(struct i2c_client *client, u8 reg, u8 data)
{
int ret = 0;
char val[4] = {0};
pr_debug("cclogic:[%s][%d]\n", __func__, __LINE__);
val[reg-1] = data;
ret = i2c_master_send(client, val, 2);
if (ret != 2) {
dev_err(&client->dev, "cclogic:%s-->i2c send error\n", __func__);
return ret;
}
return 0;
}
/* pi5usb30216d_parse_cclogic_state() */
static void pi5usb30216d_parse_cclogic_state(int reg3, int reg4,
struct cclogic_state *result)
{
pr_debug("cclogic:[%s][%d]\n", __func__, __LINE__);
result->vbus = false;
result->cc = CCLOGIC_CC_UNKNOWN;
result->evt = CCLOGIC_EVENT_NONE;
result->device = CCLOGIC_DEVICE_UNKNOWN;
result->charger = CCLOGIC_CURRENT_NONE;
if (reg3 == 0x3) {
pr_err("cclogic:%s-->detach and attach in the same time\n",
__func__);
} else{
if (reg3&0x2)
result->evt = CCLOGIC_EVENT_DETACHED;
if (reg3&0x1)
result->evt = CCLOGIC_EVENT_ATTACHED;
}
if (reg4&0x80)
result->vbus = true;
switch (reg4&0x60) {
case 0x00:
result->charger = CCLOGIC_CURRENT_NONE;
break;
case 0x20:
result->charger = CCLOGIC_CURRENT_DEFAULT;
break;
case 0x40:
result->charger = CCLOGIC_CURRENT_MEDIUM;
break;
case 0x60:
result->charger = CCLOGIC_CURRENT_HIGH;
break;
}
switch (reg4&0x3) {
case 0x01:
result->cc = CCLOGIC_CC1;
break;
case 0x02:
result->cc = CCLOGIC_CC2;
break;
default:
break;
}
switch (reg4&0x1C) {
case 0x00:
result->device = CCLOGIC_NO_DEVICE;
break;
case 0x04:
result->device = CCLOGIC_USB_DEVICE;
break;
case 0x08:
result->device = CCLOGIC_USB_HOST;
break;
case 0x0C:
result->device = CCLOGIC_AUDIO_DEVICE;
break;
case 0x10:
result->device = CCLOGIC_DEBUG_DEVICE;
break;
default:
result->device = CCLOGIC_DEVICE_UNKNOWN;
break;
}
}
/* pi5usb30216d_get_state() */
static int pi5usb30216d_get_state(struct i2c_client *client,
struct cclogic_state *state)
{
char reg[4] = {0};
int ret = 0;
pr_debug("cclogic:[%s][%d]\n", __func__, __LINE__);
ret = i2c_master_recv(client, reg, 4);
if (ret != 4) {
dev_err(&client->dev, "cclogic:%s-->i2c recv error\n", __func__);
return ret;
}
pr_debug("cclogic:%s-->i2c reg value: 0x%02x 0x%02x 0x%02x 0x%02x\n",
__func__, reg[0], reg[1], reg[2], reg[3]);
pi5usb30216d_parse_cclogic_state(reg[2], reg[3], state);
return 0;
}
/* pi5usb30216d_check_chip() */
static int pi5usb30216d_check_chip(struct i2c_client *client)
{
int ret;
char reg_test_r = {0};
pr_debug("cclogic:[%s][%d]\n", __func__, __LINE__);
/* ID check */
ret = i2c_master_recv(client, ®_test_r, 1);
if (ret != 1) {
dev_err(&client->dev, "cclogic:%s: i2c read error\n", __func__);
return ret;
}
if (reg_test_r != 0x20) {
dev_err(&client->dev, "cclogic:%s: devid mismatch (0x%02x!=0x20)\n",
__func__, reg_test_r);
return -ENODEV;
}
return 0;
}
/* pi5usb30216d_trymode() */
static int pi5usb30216d_trymode(struct i2c_client *client, int mode)
{
int ret;
char reg;
pr_debug("cclogic:[%s][%d]\n", __func__, __LINE__);
if (mode == CCLOGIC_MODE_UFP) {
reg = 0x60;
pr_debug("cclogic:trymode sink\n");
} else{
reg = 0x62;
pr_debug("cclogic:trymode source\n");
}
ret = pi5usb30216d_write_i2c(client, 0x2, reg);
if (ret) {
dev_err(&client->dev, "cclogic:%s: i2c write error\n", __func__);
return ret;
}
return ret;
}
/* pi5usb30216d_config_chip() */
static int pi5usb30216d_config_chip(struct i2c_client *client)
{
int ret;
pr_debug("cclogic:[%s][%d]\n", __func__, __LINE__);
ret = pi5usb30216d_write_i2c(client, 0x2, 0x66);
if (ret) {
dev_err(&client->dev, "cclogic:%s: i2c write error\n", __func__);
return ret;
}
return 0;
}
static struct cclogic_chip pi5usb30216d_chip = {
.chip_name = DRIVER_NAME,
.get_state = pi5usb30216d_get_state,
.ack_irq = NULL,
.chip_config = pi5usb30216d_config_chip,
.chip_reset = NULL,
.chip_check = pi5usb30216d_check_chip,
.chip_trymode = pi5usb30216d_trymode,
.typec_version = 11,/* spec 1.1 */
.support = CCLOGIC_SUPPORT_MODE_DUAL,
};
/* pi5usb30216d_init() */
static int __init pi5usb30216d_init(void)
{
pr_info("cclogic:[%s][%d]\n", __func__, __LINE__);
return cclogic_register(&pi5usb30216d_chip);
}
/* pi5usb30216d_exit() */
static void __exit pi5usb30216d_exit(void)
{
pr_info("cclogic:[%s][%d]\n", __func__, __LINE__);
cclogic_unregister(&pi5usb30216d_chip);
return;
}
late_initcall(pi5usb30216d_init);
module_exit(pi5usb30216d_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Yang ShaoYing <yangsy2@lenovo.com>");
MODULE_DESCRIPTION("Drivers for Type-C CC-Logic chip of Pericom pi5usb30216dd");
MODULE_ALIAS("platform:cc-logic");
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