| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "imx8-gpio.h" |
| |
| #include <ddk/binding.h> |
| #include <ddk/debug.h> |
| #include <ddk/platform-defs.h> |
| #include <ddk/protocol/platform-device-lib.h> |
| #include <soc/imx8m-mini/imx8m-mini-iomux.h> |
| #include <stdlib.h> |
| |
| // Configure a pin for an alternate function specified by fn |
| static zx_status_t imx8m_mini_gpio_set_alt_function(void* ctx, const uint32_t pin, |
| const uint64_t fn) { |
| imx8_gpio_t* gpio = ctx; |
| iomux_cfg_struct s_cfg = (iomux_cfg_struct)fn; |
| |
| volatile uint8_t* iomux = (volatile uint8_t*)gpio->mmio_iomux.vaddr; |
| |
| zxlogf(SPEW, "0x%lx\n", s_cfg); |
| zxlogf(SPEW, "val = 0x%lx, reg = %p\n", |
| IOMUX_CFG_MUX_MODE_VAL(GET_MUX_MODE_VAL(s_cfg)) | |
| IOMUX_CFG_SION_VAL(GET_SION_VAL(s_cfg)), |
| iomux + GET_MUX_CTL_OFF_VAL(s_cfg)); |
| zxlogf(SPEW, "val = 0x%lx, reg = %p\n", |
| IOMUX_CFG_DSE_VAL(GET_DSE_VAL(s_cfg)) | |
| IOMUX_CFG_FSEL_VAL(GET_FSEL_VAL(s_cfg)) | |
| IOMUX_CFG_ODE_VAL(GET_ODE_VAL(s_cfg)) | |
| IOMUX_CFG_PUE_VAL(GET_PUE_VAL(s_cfg)) | |
| IOMUX_CFG_HYS_VAL(GET_HYS_VAL(s_cfg)) | |
| IOMUX_CFG_PE_VAL(GET_PE_VAL(s_cfg)), |
| iomux + GET_PAD_CTL_OFF_VAL(s_cfg)); |
| zxlogf(SPEW, "val = 0x%lx, reg = %p\n", |
| IOMUX_CFG_DAISY_VAL(GET_DAISY_VAL(s_cfg)), |
| iomux + GET_SEL_INP_OFF_VAL(s_cfg)); |
| |
| if (GET_MUX_CTL_OFF_VAL(s_cfg)) { |
| writel( |
| IOMUX_CFG_MUX_MODE_VAL(GET_MUX_MODE_VAL(s_cfg)) | |
| IOMUX_CFG_SION_VAL(GET_SION_VAL(s_cfg)), |
| iomux + GET_MUX_CTL_OFF_VAL(s_cfg)); |
| } |
| if (GET_PAD_CTL_OFF_VAL(s_cfg)) { |
| writel( |
| IOMUX_CFG_DSE_VAL(GET_DSE_VAL(s_cfg)) | |
| IOMUX_CFG_FSEL_VAL(GET_FSEL_VAL(s_cfg)) | |
| IOMUX_CFG_ODE_VAL(GET_ODE_VAL(s_cfg)) | |
| IOMUX_CFG_PUE_VAL(GET_PUE_VAL(s_cfg)) | |
| IOMUX_CFG_HYS_VAL(GET_HYS_VAL(s_cfg)) | |
| IOMUX_CFG_PE_VAL(GET_PE_VAL(s_cfg)), |
| iomux + GET_PAD_CTL_OFF_VAL(s_cfg)); |
| } |
| if (GET_SEL_INP_OFF_VAL(s_cfg)) { |
| writel(IOMUX_CFG_DAISY_VAL(GET_DAISY_VAL(s_cfg)), |
| iomux + GET_SEL_INP_OFF_VAL(s_cfg)); |
| } |
| |
| return ZX_OK; |
| } |
| |
| static gpio_impl_protocol_ops_t gpio_ops = { |
| .config_in = imx8_gpio_config_in, |
| .config_out = imx8_gpio_config_out, |
| .set_alt_function = imx8m_mini_gpio_set_alt_function, |
| .read = imx8_gpio_read, |
| .write = imx8_gpio_write, |
| .get_interrupt = imx8_gpio_get_interrupt, |
| .release_interrupt = imx8_gpio_release_interrupt, |
| .set_polarity = imx8_gpio_set_polarity, |
| }; |
| |
| static void imx8m_mini_gpio_release(void* ctx) { |
| unsigned i; |
| imx8_gpio_t* gpio = ctx; |
| mtx_lock(&gpio->gpio_lock); |
| for (i = 0; i < IMX_GPIO_BLOCKS; i++) { |
| mmio_buffer_release(&gpio->mmios[i]); |
| } |
| mmio_buffer_release(&gpio->mmio_iomux); |
| |
| for (int i = 0; i < IMX_GPIO_INTERRUPTS; i++) { |
| zx_interrupt_destroy(gpio->inth[i]); |
| zx_handle_close(gpio->inth[i]); |
| } |
| free(gpio); |
| mtx_unlock(&gpio->gpio_lock); |
| } |
| |
| static zx_protocol_device_t gpio_device_proto = { |
| .version = DEVICE_OPS_VERSION, |
| .release = imx8m_mini_gpio_release, |
| }; |
| |
| static zx_status_t imx8m_mini_gpio_bind(void* ctx, zx_device_t* parent) { |
| zx_status_t status; |
| unsigned i; |
| |
| imx8_gpio_t* gpio = calloc(1, sizeof(imx8_gpio_t)); |
| if (!gpio) { |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| status = device_get_protocol(parent, ZX_PROTOCOL_PDEV, &gpio->pdev); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: ZX_PROTOCOL_PLATFORM_DEV not available %d \n", __FUNCTION__, status); |
| goto fail; |
| } |
| |
| status = device_get_protocol(parent, ZX_PROTOCOL_PBUS, &gpio->pbus); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: ZX_PROTOCOL_PBUS not available %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| |
| for (i = 0; i < IMX_GPIO_BLOCKS; i++) { |
| status = pdev_map_mmio_buffer(&gpio->pdev, i, ZX_CACHE_POLICY_UNCACHED_DEVICE, |
| &gpio->mmios[i]); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: pdev_map_mmio_buffer gpio failed %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| |
| mtx_init(&gpio->lock[i], mtx_plain); |
| } |
| |
| status = pdev_map_mmio_buffer(&gpio->pdev, IMX_GPIO_BLOCKS, ZX_CACHE_POLICY_UNCACHED_DEVICE, |
| &gpio->mmio_iomux); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: pdev_map_mmio_buffer iomux failed %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| |
| pdev_device_info_t info; |
| status = pdev_get_device_info(&gpio->pdev, &info); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: pdev_get_device_info failed %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| |
| status = zx_port_create(ZX_PORT_BIND_TO_INTERRUPT, &gpio->porth); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: zx_port_create failed %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| |
| for (i = 0; i < info.irq_count; i++) { |
| // Create Interrupt Object |
| status = pdev_map_interrupt(&gpio->pdev, i, |
| &gpio->inth[i]); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: pdev_map_interrupt failed %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| // The KEY is the Interrupt Number for our usecase |
| status = zx_interrupt_bind(gpio->inth[i], gpio->porth, i, 0 /*optons*/); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: zx_interrupt_bind failed %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| } |
| |
| thrd_create_with_name(&gpio->irq_handler, imx8_gpio_irq_handler, gpio, |
| "imx8m_mini_gpio_irq_handler"); |
| |
| device_add_args_t args = { |
| .version = DEVICE_ADD_ARGS_VERSION, |
| .name = "imx8m-mini-gpio", |
| .ctx = gpio, |
| .ops = &gpio_device_proto, |
| .flags = DEVICE_ADD_NON_BINDABLE, |
| }; |
| |
| status = device_add(parent, &args, &gpio->zxdev); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: device_add failed! %d\n", __FUNCTION__, status); |
| goto fail; |
| } |
| |
| gpio->gpio.ops = &gpio_ops; |
| gpio->gpio.ctx = gpio; |
| const platform_proxy_cb_t kCallback = {NULL, NULL}; |
| pbus_register_protocol(&gpio->pbus, ZX_PROTOCOL_GPIO_IMPL, &gpio->gpio, sizeof(gpio->gpio), |
| &kCallback); |
| |
| return ZX_OK; |
| |
| fail: |
| imx8m_mini_gpio_release(gpio); |
| return status; |
| } |
| |
| static zx_driver_ops_t imx8m_mini_gpio_driver_ops = { |
| .version = DRIVER_OPS_VERSION, |
| .bind = imx8m_mini_gpio_bind, |
| }; |
| |
| ZIRCON_DRIVER_BEGIN(imx8m_mini_gpio, imx8m_mini_gpio_driver_ops, "zircon", "0.1", 4) |
| BI_ABORT_IF(NE, BIND_PROTOCOL, ZX_PROTOCOL_PDEV), |
| BI_ABORT_IF(NE, BIND_PLATFORM_DEV_VID, PDEV_VID_NXP), |
| BI_ABORT_IF(NE, BIND_PLATFORM_DEV_DID, PDEV_DID_IMX_GPIO), |
| BI_MATCH_IF(EQ, BIND_PLATFORM_DEV_PID, PDEV_PID_IMX8MMEVK), |
| ZIRCON_DRIVER_END(imx8m_mini_gpio) |
