diff options
Diffstat (limited to 'drivers/misc/cclogic/pi5usb30216d.c')
| -rw-r--r-- | drivers/misc/cclogic/pi5usb30216d.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/misc/cclogic/pi5usb30216d.c b/drivers/misc/cclogic/pi5usb30216d.c new file mode 100644 index 000000000000..ba7d6449c736 --- /dev/null +++ b/drivers/misc/cclogic/pi5usb30216d.c @@ -0,0 +1,245 @@ +/* + * 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"); |