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https://github.com/NVIDIA/open-gpu-kernel-modules.git
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575.51.02
This commit is contained in:
Bernhard Stoeckner
273
kernel-open/nvidia/nv-gpio.c
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273
kernel-open/nvidia/nv-gpio.c
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/*
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* SPDX-FileCopyrightText: Copyright (c) 2020 - 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#define __NO_VERSION__
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#include "os-interface.h"
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#include "nv-linux.h"
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#include "os_gpio.h"
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#define NV_GPIOF_DIR_IN (1 << 0)
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/*!
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* @brief Mapping array of OS GPIO function ID to OS function name,
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* this name is used to get GPIO number from Device Tree.
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*/
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static const char *osMapGpioFunc[] = {
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[NV_OS_GPIO_FUNC_HOTPLUG_A] = "os_gpio_hotplug_a",
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[NV_OS_GPIO_FUNC_HOTPLUG_B] = "os_gpio_hotplug_b",
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};
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NV_STATUS NV_API_CALL nv_gpio_get_pin_state
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(
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nv_state_t *nv,
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NvU32 pinNum,
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NvU32 *pinValue
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)
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{
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int ret;
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#if defined(NV_GPIO_GET_VALUE_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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ret = gpio_get_value(pinNum);
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#else
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nv_printf(NV_DBG_ERRORS, "gpio_get_value not present\n");
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return NV_ERR_GENERIC;
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#endif
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if (ret < 0)
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{
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nv_printf(NV_DBG_ERRORS, "%s: failed with err: %d\n",
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__func__, ret);
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return NV_ERR_GENERIC;
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}
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*pinValue = ret;
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return NV_OK;
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}
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void NV_API_CALL nv_gpio_set_pin_state
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(
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nv_state_t *nv,
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NvU32 pinNum,
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NvU32 pinValue
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)
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{
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#if defined(NV_GPIO_SET_VALUE_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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gpio_set_value(pinNum, pinValue);
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#else
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nv_printf(NV_DBG_ERRORS, "gpio_set_value not present\n");
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#endif
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}
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NV_STATUS NV_API_CALL nv_gpio_set_pin_direction
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(
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nv_state_t *nv,
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NvU32 pinNum,
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NvU32 direction
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)
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{
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int ret;
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if (direction)
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{
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#if defined(NV_GPIO_DIRECTION_INPUT_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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ret = gpio_direction_input(pinNum);
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#else
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nv_printf(NV_DBG_ERRORS, "gpio_direction_input not present\n");
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return NV_ERR_GENERIC;
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#endif
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}
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else
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{
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#if defined(NV_GPIO_DIRECTION_OUTPUT_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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ret = gpio_direction_output(pinNum, 0);
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#else
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nv_printf(NV_DBG_ERRORS, "gpio_direction_output not present\n");
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return NV_ERR_GENERIC;
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#endif
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}
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if (ret)
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{
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nv_printf(NV_DBG_ERRORS, "%s: failed with err: %d\n",
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__func__, ret);
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return NV_ERR_GENERIC;
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}
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return NV_OK;
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}
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NV_STATUS NV_API_CALL nv_gpio_get_pin_direction
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(
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nv_state_t *nv,
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NvU32 pinNum,
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NvU32 *direction
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)
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{
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/*!
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* TODO: Commenting out until gpio_get_direction wrapper
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* support is added in kernel.
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*/
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#if 0
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int ret;
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ret = nv_gpio_get_direction(pinNum);
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if (ret)
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{
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nv_printf(NV_DBG_ERRORS, "%s: failed with err: %d\n",
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__func__, ret);
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return NV_ERR_GENERIC;
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}
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*direction = ret;
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#endif
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return NV_OK;
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}
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NV_STATUS NV_API_CALL nv_gpio_get_pin_number
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(
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nv_state_t *nv,
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NvU32 function,
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NvU32 *pinNum
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)
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{
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nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
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int rc;
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(void)nvl;
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#if defined(NV_OF_GET_NAME_GPIO_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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rc = of_get_named_gpio(nvl->dev->of_node, osMapGpioFunc[function], 0);
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#else
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nv_printf(NV_DBG_ERRORS, "of_get_named_gpio not present\n");
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return NV_ERR_GENERIC;
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#endif
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if (rc < 0)
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{
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nv_printf(NV_DBG_ERRORS, "of_get_name_gpio failed for gpio - %s, rc - %d\n",
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osMapGpioFunc[function], rc);
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return NV_ERR_GENERIC;
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}
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*pinNum = rc;
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#if defined(NV_DEVM_GPIO_REQUEST_ONE_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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rc = devm_gpio_request_one(nvl->dev, *pinNum, NV_GPIOF_DIR_IN,
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osMapGpioFunc[function]);
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#else
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nv_printf(NV_DBG_ERRORS, "devm_gpio_request_one not present\n");
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return NV_ERR_GENERIC;
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#endif
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if (rc < 0)
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{
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nv_printf(NV_DBG_ERRORS, "request gpio failed for gpio - %s, rc - %d\n",
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osMapGpioFunc[function], rc);
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return NV_ERR_GENERIC;
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}
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return NV_OK;
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}
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NvBool NV_API_CALL nv_gpio_get_pin_interrupt_status
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(
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nv_state_t *nv,
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NvU32 pinNum,
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NvU32 direction
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)
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{
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NvU32 irqGpioPin;
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NvU32 pinValue;
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if (nv_get_current_irq_type(nv) != NV_SOC_IRQ_GPIO_TYPE)
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{
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return NV_FALSE;
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}
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nv_get_current_irq_priv_data(nv, &irqGpioPin);
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if (pinNum != irqGpioPin)
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{
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return NV_FALSE;
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}
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#if defined(NV_GPIO_GET_VALUE_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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pinValue = gpio_get_value(pinNum);
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#else
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nv_printf(NV_DBG_ERRORS, "gpio_get_value not present\n");
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return NV_FALSE;
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#endif
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if (pinValue != direction)
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{
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return NV_FALSE;
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}
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return NV_TRUE;
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}
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NV_STATUS NV_API_CALL nv_gpio_set_pin_interrupt
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(
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nv_state_t * nv,
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NvU32 pinNum,
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NvU32 trigger_level
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)
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{
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nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
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int rc;
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int irq_num;
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#if defined(NV_GPIO_TO_IRQ_PRESENT) && NV_SUPPORTS_PLATFORM_DEVICE
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irq_num = gpio_to_irq(pinNum);
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#else
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nv_printf(NV_DBG_ERRORS, "gpio_to_irq not present\n");
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return NV_ERR_GENERIC;
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#endif
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/*
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* Ignore setting interrupt for falling trigger for hotplug gpio pin
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* as hotplug sequence calls this function twice to set the level
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* (rising/falling) of interrupt for same gpio pin. Linux interrupt
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* registration allows only once to register the interrupt with required
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* trigger levels. So to avoid re-registration, skip registering for
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* falling trigger level but when this function called with rising trigger
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* then itself register for both rising/falling triggers.
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*/
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if (trigger_level == 0)
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{
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return NV_OK;
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}
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rc = nv_request_soc_irq(nvl, irq_num, NV_SOC_IRQ_GPIO_TYPE,
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(IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
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IRQF_ONESHOT), pinNum,
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"hdmi-hotplug");
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if (rc < 0)
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{
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nv_printf(NV_DBG_ERRORS, "IRQ registration failed for gpio - %d, rc - %d\n",
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pinNum, rc);
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return NV_ERR_GENERIC;
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}
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/* Disable the irq after registration as RM init sequence re-enables it */
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disable_irq_nosync(irq_num);
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return NV_OK;
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}
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