diff options
Diffstat (limited to 'drivers/misc/microchip/hub/hub_usb5734.c')
| -rw-r--r-- | drivers/misc/microchip/hub/hub_usb5734.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/drivers/misc/microchip/hub/hub_usb5734.c b/drivers/misc/microchip/hub/hub_usb5734.c new file mode 100644 index 000000000000..e71c9934b0b8 --- /dev/null +++ b/drivers/misc/microchip/hub/hub_usb5734.c @@ -0,0 +1,300 @@ +/* + * otgid_gpio_hub.c + * + * Copyright (c) Hisilicon Tech. Co., Ltd. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/timer.h> +#include <linux/param.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/workqueue.h> +#include <linux/slab.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/uaccess.h> +#include <linux/fs.h> +#include <linux/hisi/log/hisi_log.h> +#include <linux/hisi/usb/hisi_usb.h> +#include <linux/tifm.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/hisi/usb/hub/hisi_hub.h> +#define DEVICE_DRIVER_NAME "gpio_hub_for_usb5734" + +#define GPIO_HUB_OTG_HOST 1 +#define GPIO_HUB_OTG_DEVICE 0 +#define GPIO_TYPEC_VBUS_POWER 1 +#define GPIO_TYPEC_NO_POWER 0 +#define GPIO_HUB_VBUS_POWER 1 +#define GPIO_HUB_VBUS_NO_POWER 0 +#define GPIO_HUB_HUB_VBUS_POWER 1 + +/* SOC_CRGPERIPH_PEREN1_UNION */ +#define SOC_CRGPERIPH_PEREN1_ADDR(base) ((base) + (0x010)) + +#define HISILOG_TAG GPIO_HUB +HISILOG_REGIST(); + +struct gpio_hub_info { + struct platform_device *pdev; + int otg_switch_gpio; + int typec_vbus_gpio; + int typec_vbus_enable_val; + int hub_vbus_gpio; +}; + +static struct gpio_hub_info gpio_hub_driver_info = { + .otg_switch_gpio = -1, + .typec_vbus_gpio = -1, + .typec_vbus_enable_val = -1, + .hub_vbus_gpio = -1, +}; + +void gpio_hub_power_off(void) +{ + if (gpio_is_valid(gpio_hub_driver_info.hub_vbus_gpio)) { + gpio_set_value(gpio_hub_driver_info.hub_vbus_gpio, + GPIO_HUB_VBUS_NO_POWER); + hisilog_info("%s: gpio hub hub vbus no power set success", + __func__); + } else { + hisilog_err("%s: gpio hub hub vbus no power set err", + __func__); + } +} + +void gpio_hub_power_on(void) +{ + if (gpio_is_valid(gpio_hub_driver_info.hub_vbus_gpio)) + gpio_set_value(gpio_hub_driver_info.hub_vbus_gpio, + GPIO_HUB_VBUS_POWER); + else + hisilog_err("%s: gpio hub hub vbus set err", __func__); +} + +void gpio_hub_switch_to_hub(void) +{ + int gpio = gpio_hub_driver_info.otg_switch_gpio; + + if (!gpio_is_valid(gpio)) { + hisilog_err("%s: otg_switch_gpio is err\n", __func__); + return; + } + + if (gpio_get_value(gpio)) { + hisilog_info("%s: already switch to hub\n", __func__); + return; + } + + gpio_direction_output(gpio, 1); + hisilog_err("%s: switch to hub\n", __func__); +} +EXPORT_SYMBOL_GPL(gpio_hub_switch_to_hub); + +void gpio_hub_switch_to_typec(void) +{ + int gpio = gpio_hub_driver_info.otg_switch_gpio; + + if (!gpio_is_valid(gpio)) { + hisilog_err("%s: otg_switch_gpio is err\n", __func__); + return; + } + + if (!gpio_get_value(gpio)) { + hisilog_info("%s: already switch to typec\n", __func__); + return; + } + + gpio_direction_output(gpio, 0); + hisilog_err("%s: switch to typec\n", __func__); +} +EXPORT_SYMBOL_GPL(gpio_hub_switch_to_typec); + +static void gpio_hub_change_typec_power(int gpio, int on) +{ + if (!gpio_is_valid(gpio)) { + hisilog_err("%s: typec power gpio is err\n", __func__); + return; + } + + if (gpio_get_value(gpio) == on) { + hisilog_info("%s: typec power no change\n", __func__); + return; + } + + gpio_direction_output(gpio, on); + hisilog_info("%s: set typec vbus gpio to %d\n", __func__, on); +} + +void gpio_hub_typec_power_on(void) +{ + struct gpio_hub_info *info = &gpio_hub_driver_info; + + gpio_hub_change_typec_power(info->typec_vbus_gpio, + info->typec_vbus_enable_val); +} +EXPORT_SYMBOL_GPL(gpio_hub_typec_power_on); + +void gpio_hub_typec_power_off(void) +{ + struct gpio_hub_info *info = &gpio_hub_driver_info; + + gpio_hub_change_typec_power(info->typec_vbus_gpio, + !info->typec_vbus_enable_val); +} +EXPORT_SYMBOL_GPL(gpio_hub_typec_power_off); + +static int gpio_hub_probe(struct platform_device *pdev) +{ + int ret; + struct device_node *root = pdev->dev.of_node; + struct gpio_hub_info *info = &gpio_hub_driver_info; + + hisilog_info("%s: step in\n", __func__); + + info->pdev = pdev; + if (!pdev) + return -EBUSY; + + info->hub_vbus_gpio = of_get_named_gpio(root, "hub_vdd33_en_gpio", 0); + if (!gpio_is_valid(info->hub_vbus_gpio)) { + hisilog_err("%s: hub_vbus_gpio is err\n", __func__); + return info->hub_vbus_gpio; + } + ret = gpio_request(info->hub_vbus_gpio, "hub_vbus_int_gpio"); + if (ret) { + hisilog_err("%s: request hub_vbus_gpio err\n", __func__); + return ret; + } + + info->typec_vbus_gpio = of_get_named_gpio(root, + "typc_vbus_int_gpio,typec-gpios", 0); + if (!gpio_is_valid(info->hub_vbus_gpio)) { + hisilog_err("%s: typec_vbus_gpio is err\n", __func__); + ret = info->typec_vbus_gpio; + goto free_gpio1; + } + ret = gpio_request(info->typec_vbus_gpio, "typc_vbus_int_gpio"); + if (ret) { + hisilog_err("%s: request typec_vbus_gpio err\n", __func__); + goto free_gpio1; + } + + ret = of_property_read_u32(root, "typc_vbus_enable_val", + &info->typec_vbus_enable_val); + if (ret) { + hisilog_err("%s: typc_vbus_enable_val can't get\n", __func__); + goto free_gpio2; + } + info->typec_vbus_enable_val = !!info->typec_vbus_enable_val; + + /* only for v2 */ + info->otg_switch_gpio = of_get_named_gpio(root, "otg_gpio", 0); + if (!gpio_is_valid(info->otg_switch_gpio)) { + hisilog_info("%s: otg_switch_gpio is err\n", __func__); + info->otg_switch_gpio = -1; + } + + ret = gpio_direction_output(info->hub_vbus_gpio, GPIO_HUB_VBUS_POWER); + if (ret) { + hisilog_err("%s: power on hub vbus err\n", __func__); + goto free_gpio2; + } + + ret = gpio_direction_output(info->typec_vbus_gpio, + info->typec_vbus_enable_val); + if (ret) { + hisilog_err("%s: power on typec vbus err", __func__); + goto free_gpio2; + } + + return 0; + +free_gpio2: + gpio_free(info->typec_vbus_gpio); + info->typec_vbus_gpio = -1; +free_gpio1: + gpio_free(info->hub_vbus_gpio); + info->hub_vbus_gpio = -1; + + return ret; +} + +static int gpio_hub_remove(struct platform_device *pdev) +{ + struct gpio_hub_info *info = &gpio_hub_driver_info; + + if (gpio_is_valid(info->otg_switch_gpio)) { + gpio_free(info->otg_switch_gpio); + info->otg_switch_gpio = -1; + } + + if (gpio_is_valid(info->typec_vbus_gpio)) { + gpio_free(info->typec_vbus_gpio); + info->typec_vbus_gpio = -1; + } + + if (gpio_is_valid(info->hub_vbus_gpio)) { + gpio_free(info->hub_vbus_gpio); + info->hub_vbus_gpio = -1; + } + return 0; +} + +static const struct of_device_id id_table_for_gpio_hub[] = { + {.compatible = "hisilicon,gpio_hubv1"}, + {.compatible = "hisilicon,gpio_hubv2"}, + {} +}; + +static struct platform_driver gpio_hub_driver = { + .probe = gpio_hub_probe, + .remove = gpio_hub_remove, + .driver = { + .name = DEVICE_DRIVER_NAME, + .of_match_table = of_match_ptr(id_table_for_gpio_hub), + + }, +}; + +static int __init gpio_hub_init(void) +{ + int ret = platform_driver_register(&gpio_hub_driver); + + hisilog_info("%s:gpio hub init status:%d\n", __func__, ret); + return ret; +} + +static void __exit gpio_hub_exit(void) +{ + platform_driver_unregister(&gpio_hub_driver); +} + +module_init(gpio_hub_init); +module_exit(gpio_hub_exit); + +MODULE_AUTHOR("wangbinghui<wangbinghui@hisilicon.com>"); +MODULE_DESCRIPTION("HUB GPIO FOR OTG ID driver"); +MODULE_LICENSE("GPL v2"); |