mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 06:12:58 +00:00
488d3dae24
MAX14526 is a powerful extcon chip which allows detection of various plugs like usb, mhl, uart, headset etc. This version of driver implements support of AP-usb and CP-usb/uart paths. Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # LG P880 T30 Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # LG P895 T30 Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2022 Svyatoslav Ryhel <clamor95@gmail.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/err.h>
|
|
#include <log.h>
|
|
#include <extcon.h>
|
|
#include <asm/gpio.h>
|
|
|
|
#define CONTROL_1 0x01
|
|
#define SW_CONTROL 0x03
|
|
|
|
#define ID_200 0x10
|
|
#define ADC_EN 0x02
|
|
#define CP_EN 0x01
|
|
|
|
#define DP_USB 0x00
|
|
#define DP_UART 0x08
|
|
#define DP_AUDIO 0x10
|
|
#define DP_OPEN 0x38
|
|
|
|
#define DM_USB 0x00
|
|
#define DM_UART 0x01
|
|
#define DM_AUDIO 0x02
|
|
#define DM_OPEN 0x07
|
|
|
|
#define AP_USB BIT(0)
|
|
#define CP_USB BIT(1)
|
|
#define CP_UART BIT(2)
|
|
|
|
struct max14526_priv {
|
|
struct gpio_desc usif_gpio;
|
|
struct gpio_desc dp2t_gpio;
|
|
struct gpio_desc ifx_usb_vbus_gpio;
|
|
};
|
|
|
|
static void max14526_set_mode(struct udevice *dev, int mode)
|
|
{
|
|
struct max14526_priv *priv = dev_get_priv(dev);
|
|
int ret;
|
|
|
|
if ((mode & AP_USB) || (mode & CP_USB)) {
|
|
/* Connect CP UART signals to AP */
|
|
ret = dm_gpio_set_value(&priv->usif_gpio, 0);
|
|
if (ret)
|
|
log_debug("cp-uart > ap failed (%d)\n", ret);
|
|
}
|
|
|
|
if (mode & CP_UART) {
|
|
/* Connect CP UART signals to DP2T */
|
|
ret = dm_gpio_set_value(&priv->usif_gpio, 1);
|
|
if (ret)
|
|
log_debug("cp-uart > dp2t failed (%d)\n", ret);
|
|
}
|
|
|
|
if (mode & CP_USB) {
|
|
/* Connect CP USB to MUIC UART */
|
|
ret = dm_gpio_set_value(&priv->ifx_usb_vbus_gpio, 1);
|
|
if (ret)
|
|
log_debug("usb-vbus-gpio enable failed (%d)\n", ret);
|
|
|
|
ret = dm_gpio_set_value(&priv->dp2t_gpio, 1);
|
|
if (ret)
|
|
log_debug("cp-usb > muic-uart failed (%d)\n", ret);
|
|
}
|
|
|
|
if ((mode & AP_USB) || (mode & CP_UART)) {
|
|
/* Connect CP UART to MUIC UART */
|
|
ret = dm_gpio_set_value(&priv->dp2t_gpio, 0);
|
|
if (ret)
|
|
log_debug("cp-uart > muic-uart failed (%d)\n", ret);
|
|
}
|
|
|
|
if (mode & AP_USB) {
|
|
/* Enables USB Path */
|
|
ret = dm_i2c_reg_write(dev, SW_CONTROL, DP_USB | DM_USB);
|
|
if (ret)
|
|
log_debug("USB path set failed: %d\n", ret);
|
|
}
|
|
|
|
if ((mode & CP_USB) || (mode & CP_UART)) {
|
|
/* Enables UART Path */
|
|
ret = dm_i2c_reg_write(dev, SW_CONTROL, DP_UART | DM_UART);
|
|
if (ret)
|
|
log_debug("UART path set failed: %d\n", ret);
|
|
}
|
|
|
|
/* Enables 200K, Charger Pump, and ADC */
|
|
ret = dm_i2c_reg_write(dev, CONTROL_1, ID_200 | ADC_EN | CP_EN);
|
|
if (ret)
|
|
log_debug("200K, Charger Pump, and ADC set failed: %d\n", ret);
|
|
}
|
|
|
|
static int max14526_probe(struct udevice *dev)
|
|
{
|
|
struct max14526_priv *priv = dev_get_priv(dev);
|
|
int ret, mode = 0;
|
|
|
|
ret = gpio_request_by_name(dev, "usif-gpios", 0,
|
|
&priv->usif_gpio, GPIOD_IS_OUT);
|
|
if (ret) {
|
|
log_err("could not decode usif-gpios (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = gpio_request_by_name(dev, "dp2t-gpios", 0,
|
|
&priv->dp2t_gpio, GPIOD_IS_OUT);
|
|
if (ret) {
|
|
log_err("could not decode dp2t-gpios (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (dev_read_bool(dev, "maxim,ap-usb"))
|
|
mode |= AP_USB;
|
|
|
|
if (dev_read_bool(dev, "maxim,cp-usb")) {
|
|
mode |= CP_USB;
|
|
|
|
ret = gpio_request_by_name(dev, "usb-vbus-gpios", 0,
|
|
&priv->ifx_usb_vbus_gpio, GPIOD_IS_OUT);
|
|
if (ret) {
|
|
log_err("could not decode usb-vbus-gpios (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (dev_read_bool(dev, "maxim,cp-uart"))
|
|
mode |= CP_UART;
|
|
|
|
max14526_set_mode(dev, mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id max14526_ids[] = {
|
|
{ .compatible = "maxim,max14526-muic" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(extcon_max14526) = {
|
|
.name = "extcon_max14526",
|
|
.id = UCLASS_EXTCON,
|
|
.of_match = max14526_ids,
|
|
.probe = max14526_probe,
|
|
.priv_auto = sizeof(struct max14526_priv),
|
|
};
|