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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>
152 lines
3.4 KiB
C
152 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2022 Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <i2c.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <log.h>
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#include <extcon.h>
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#include <asm/gpio.h>
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#define CONTROL_1 0x01
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#define SW_CONTROL 0x03
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#define ID_200 0x10
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#define ADC_EN 0x02
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#define CP_EN 0x01
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#define DP_USB 0x00
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#define DP_UART 0x08
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#define DP_AUDIO 0x10
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#define DP_OPEN 0x38
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#define DM_USB 0x00
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#define DM_UART 0x01
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#define DM_AUDIO 0x02
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#define DM_OPEN 0x07
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#define AP_USB BIT(0)
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#define CP_USB BIT(1)
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#define CP_UART BIT(2)
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struct max14526_priv {
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struct gpio_desc usif_gpio;
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struct gpio_desc dp2t_gpio;
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struct gpio_desc ifx_usb_vbus_gpio;
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};
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static void max14526_set_mode(struct udevice *dev, int mode)
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{
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struct max14526_priv *priv = dev_get_priv(dev);
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int ret;
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if ((mode & AP_USB) || (mode & CP_USB)) {
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/* Connect CP UART signals to AP */
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ret = dm_gpio_set_value(&priv->usif_gpio, 0);
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if (ret)
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log_debug("cp-uart > ap failed (%d)\n", ret);
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}
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if (mode & CP_UART) {
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/* Connect CP UART signals to DP2T */
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ret = dm_gpio_set_value(&priv->usif_gpio, 1);
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if (ret)
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log_debug("cp-uart > dp2t failed (%d)\n", ret);
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}
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if (mode & CP_USB) {
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/* Connect CP USB to MUIC UART */
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ret = dm_gpio_set_value(&priv->ifx_usb_vbus_gpio, 1);
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if (ret)
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log_debug("usb-vbus-gpio enable failed (%d)\n", ret);
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ret = dm_gpio_set_value(&priv->dp2t_gpio, 1);
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if (ret)
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log_debug("cp-usb > muic-uart failed (%d)\n", ret);
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}
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if ((mode & AP_USB) || (mode & CP_UART)) {
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/* Connect CP UART to MUIC UART */
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ret = dm_gpio_set_value(&priv->dp2t_gpio, 0);
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if (ret)
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log_debug("cp-uart > muic-uart failed (%d)\n", ret);
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}
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if (mode & AP_USB) {
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/* Enables USB Path */
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ret = dm_i2c_reg_write(dev, SW_CONTROL, DP_USB | DM_USB);
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if (ret)
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log_debug("USB path set failed: %d\n", ret);
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}
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if ((mode & CP_USB) || (mode & CP_UART)) {
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/* Enables UART Path */
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ret = dm_i2c_reg_write(dev, SW_CONTROL, DP_UART | DM_UART);
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if (ret)
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log_debug("UART path set failed: %d\n", ret);
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}
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/* Enables 200K, Charger Pump, and ADC */
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ret = dm_i2c_reg_write(dev, CONTROL_1, ID_200 | ADC_EN | CP_EN);
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if (ret)
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log_debug("200K, Charger Pump, and ADC set failed: %d\n", ret);
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}
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static int max14526_probe(struct udevice *dev)
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{
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struct max14526_priv *priv = dev_get_priv(dev);
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int ret, mode = 0;
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ret = gpio_request_by_name(dev, "usif-gpios", 0,
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&priv->usif_gpio, GPIOD_IS_OUT);
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if (ret) {
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log_err("could not decode usif-gpios (%d)\n", ret);
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return ret;
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}
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ret = gpio_request_by_name(dev, "dp2t-gpios", 0,
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&priv->dp2t_gpio, GPIOD_IS_OUT);
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if (ret) {
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log_err("could not decode dp2t-gpios (%d)\n", ret);
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return ret;
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}
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if (dev_read_bool(dev, "maxim,ap-usb"))
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mode |= AP_USB;
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if (dev_read_bool(dev, "maxim,cp-usb")) {
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mode |= CP_USB;
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ret = gpio_request_by_name(dev, "usb-vbus-gpios", 0,
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&priv->ifx_usb_vbus_gpio, GPIOD_IS_OUT);
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if (ret) {
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log_err("could not decode usb-vbus-gpios (%d)\n", ret);
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return ret;
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}
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}
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if (dev_read_bool(dev, "maxim,cp-uart"))
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mode |= CP_UART;
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max14526_set_mode(dev, mode);
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return 0;
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}
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static const struct udevice_id max14526_ids[] = {
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{ .compatible = "maxim,max14526-muic" },
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{ }
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};
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U_BOOT_DRIVER(extcon_max14526) = {
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.name = "extcon_max14526",
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.id = UCLASS_EXTCON,
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.of_match = max14526_ids,
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.probe = max14526_probe,
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.priv_auto = sizeof(struct max14526_priv),
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};
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