| /******************************************************************************* |
| * |
| * Copyright(c) 2015,2016 Intel Corporation. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| ******************************************************************************/ |
| |
| /** |
| * @file |
| * @brief CDC ACM device class driver |
| * |
| * Driver for USB CDC ACM device class driver |
| */ |
| |
| #include <nanokernel.h> |
| #include <init.h> |
| #include <uart.h> |
| #include <string.h> |
| #include <misc/byteorder.h> |
| #include "cdc_acm.h" |
| #include "usb_device.h" |
| #include "usb_common.h" |
| |
| #ifndef CONFIG_UART_INTERRUPT_DRIVEN |
| #error "CONFIG_UART_INTERRUPT_DRIVEN must be set for CDC ACM driver" |
| #endif |
| |
| /* definitions */ |
| |
| #define SYS_LOG_LEVEL CONFIG_SYS_LOG_USB_CDC_ACM_LEVEL |
| #include <misc/sys_log.h> |
| |
| #define DEV_DATA(dev) \ |
| ((struct cdc_acm_dev_data_t * const)(dev)->driver_data) |
| |
| static struct uart_driver_api cdc_acm_driver_api; |
| |
| /* 115200bps, no parity, 1 stop bit, 8bit char */ |
| #define CDC_ACM_DEFAUL_BAUDRATE {sys_cpu_to_le32(115200), 0, 0, 8} |
| |
| /* Size of the internal buffer used for storing received data */ |
| #define CDC_ACM_BUFFER_SIZE (2 * CDC_BULK_EP_MPS) |
| |
| /* Misc. macros */ |
| #define LOW_BYTE(x) ((x) & 0xFF) |
| #define HIGH_BYTE(x) ((x) >> 8) |
| |
| struct device *cdc_acm_dev; |
| |
| static struct nano_sem poll_wait_sem; |
| |
| /* Device data structure */ |
| struct cdc_acm_dev_data_t { |
| /* USB device status code */ |
| enum usb_dc_status_code usb_status; |
| /* Callback function pointer */ |
| uart_irq_callback_t cb; |
| /* Tx ready status. Signals when */ |
| uint8_t tx_ready; |
| uint8_t rx_ready; /* Rx ready status */ |
| uint8_t tx_irq_ena; /* Tx interrupt enable status */ |
| uint8_t rx_irq_ena; /* Rx interrupt enable status */ |
| uint8_t rx_buf[CDC_ACM_BUFFER_SIZE];/* Internal Rx buffer */ |
| uint32_t rx_buf_head; /* Head of the internal Rx buffer */ |
| uint32_t rx_buf_tail; /* Tail of the internal Rx buffer */ |
| /* Interface data buffer */ |
| uint8_t interface_data[CDC_CLASS_REQ_MAX_DATA_SIZE]; |
| /* CDC ACM line coding properties. LE order */ |
| struct cdc_acm_line_coding line_coding; |
| /* CDC ACM line state bitmap, DTE side */ |
| uint8_t line_state; |
| /* CDC ACM serial state bitmap, DCE side */ |
| uint8_t serial_state; |
| /* CDC ACM notification sent status */ |
| uint8_t notification_sent; |
| }; |
| |
| /* Structure representing the global USB description */ |
| static const uint8_t cdc_acm_usb_description[] = { |
| /* Device descriptor */ |
| USB_DEVICE_DESC_SIZE, /* Descriptor size */ |
| USB_DEVICE_DESC, /* Descriptor type */ |
| LOW_BYTE(USB_1_1), |
| HIGH_BYTE(USB_1_1), /* USB version in BCD format */ |
| COMMUNICATION_DEVICE_CLASS, /* Class */ |
| 0x00, /* SubClass - Interface specific */ |
| 0x00, /* Protocol - Interface specific */ |
| MAX_PACKET_SIZE0, /* Max Packet Size */ |
| LOW_BYTE(CDC_VENDOR_ID), |
| HIGH_BYTE(CDC_VENDOR_ID), /* Vendor Id */ |
| LOW_BYTE(CDC_PRODUCT_ID), |
| HIGH_BYTE(CDC_PRODUCT_ID), /* Product Id */ |
| LOW_BYTE(BCDDEVICE_RELNUM), |
| HIGH_BYTE(BCDDEVICE_RELNUM), /* Device Release Number */ |
| /* Index of Manufacturer String Descriptor */ |
| 0x01, |
| /* Index of Product String Descriptor */ |
| 0x02, |
| /* Index of Serial Number String Descriptor */ |
| 0x03, |
| CDC_NUM_CONF, /* Number of Possible Configuration */ |
| |
| /* Configuration descriptor */ |
| USB_CONFIGURATION_DESC_SIZE, /* Descriptor size */ |
| USB_CONFIGURATION_DESC, /* Descriptor type */ |
| /* Total length in bytes of data returned */ |
| LOW_BYTE(CDC_CONF_SIZE), |
| HIGH_BYTE(CDC_CONF_SIZE), |
| CDC_NUM_ITF, /* Number of interfaces */ |
| 0x01, /* Configuration value */ |
| 0x00, /* Index of the Configuration string */ |
| USB_CONFIGURATION_ATTRIBUTES, /* Attributes */ |
| MAX_LOW_POWER, /* Max power consumption */ |
| |
| /* Interface descriptor */ |
| USB_INTERFACE_DESC_SIZE, /* Descriptor size */ |
| USB_INTERFACE_DESC, /* Descriptor type */ |
| 0x00, /* Interface index */ |
| 0x00, /* Alternate setting */ |
| CDC1_NUM_EP, /* Number of Endpoints */ |
| COMMUNICATION_DEVICE_CLASS, /* Class */ |
| ACM_SUBCLASS, /* SubClass */ |
| V25TER_PROTOCOL, /* Protocol */ |
| /* Index of the Interface String Descriptor */ |
| 0x00, |
| |
| /* Header Functional Descriptor */ |
| USB_HFUNC_DESC_SIZE, /* Descriptor size */ |
| CS_INTERFACE, /* Descriptor type */ |
| USB_HFUNC_SUBDESC, /* Descriptor SubType */ |
| LOW_BYTE(USB_1_1), |
| HIGH_BYTE(USB_1_1), /* CDC Device Release Number */ |
| |
| /* Call Management Functional Descriptor */ |
| USB_CMFUNC_DESC_SIZE, /* Descriptor size */ |
| CS_INTERFACE, /* Descriptor type */ |
| USB_CMFUNC_SUBDESC, /* Descriptor SubType */ |
| 0x00, /* Capabilities */ |
| 0x01, /* Data Interface */ |
| |
| /* ACM Functional Descriptor */ |
| USB_ACMFUNC_DESC_SIZE, /* Descriptor size */ |
| CS_INTERFACE, /* Descriptor type */ |
| USB_ACMFUNC_SUBDESC, /* Descriptor SubType */ |
| /* Capabilities - Device supports the request combination of: |
| * Set_Line_Coding, |
| * Set_Control_Line_State, |
| * Get_Line_Coding |
| * and the notification Serial_State |
| */ |
| 0x02, |
| |
| /* Union Functional Descriptor */ |
| USB_UFUNC_DESC_SIZE, /* Descriptor size */ |
| CS_INTERFACE, /* Descriptor type */ |
| USB_UFUNC_SUBDESC, /* Descriptor SubType */ |
| 0x00, /* Master Interface */ |
| 0x01, /* Slave Interface */ |
| |
| /* Endpoint INT */ |
| USB_ENDPOINT_DESC_SIZE, /* Descriptor size */ |
| USB_ENDPOINT_DESC, /* Descriptor type */ |
| CDC_ENDP_INT, /* Endpoint address */ |
| USB_DC_EP_INTERRUPT, /* Attributes */ |
| LOW_BYTE(CDC_INTERRUPT_EP_MPS), |
| HIGH_BYTE(CDC_INTERRUPT_EP_MPS),/* Max packet size */ |
| 0x0A, /* Interval */ |
| |
| /* Interface descriptor */ |
| USB_INTERFACE_DESC_SIZE, /* Descriptor size */ |
| USB_INTERFACE_DESC, /* Descriptor type */ |
| 0x01, /* Interface index */ |
| 0x00, /* Alternate setting */ |
| CDC2_NUM_EP, /* Number of Endpoints */ |
| COMMUNICATION_DEVICE_CLASS_DATA,/* Class */ |
| 0x00, /* SubClass */ |
| 0x00, /* Protocol */ |
| /* Index of the Interface String Descriptor */ |
| 0x00, |
| |
| /* First Endpoint IN */ |
| USB_ENDPOINT_DESC_SIZE, /* Descriptor size */ |
| USB_ENDPOINT_DESC, /* Descriptor type */ |
| CDC_ENDP_IN, /* Endpoint address */ |
| USB_DC_EP_BULK, /* Attributes */ |
| LOW_BYTE(CDC_BULK_EP_MPS), |
| HIGH_BYTE(CDC_BULK_EP_MPS), /* Max packet size */ |
| 0x00, /* Interval */ |
| |
| /* Second Endpoint OUT */ |
| USB_ENDPOINT_DESC_SIZE, /* Descriptor size */ |
| USB_ENDPOINT_DESC, /* Descriptor type */ |
| CDC_ENDP_OUT, /* Endpoint address */ |
| USB_DC_EP_BULK, /* Attributes */ |
| LOW_BYTE(CDC_BULK_EP_MPS), |
| HIGH_BYTE(CDC_BULK_EP_MPS), /* Max packet size */ |
| 0x00, /* Interval */ |
| |
| /* String descriptor language, only one, so min size 4 bytes. |
| * 0x0409 English(US) language code used |
| */ |
| USB_STRING_DESC_SIZE, /* Descriptor size */ |
| USB_STRING_DESC, /* Descriptor type */ |
| 0x09, |
| 0x04, |
| |
| /* Manufacturer String Descriptor "Intel" */ |
| 0x0C, |
| USB_STRING_DESC, |
| 'I', 0, 'n', 0, 't', 0, 'e', 0, 'l', 0, |
| |
| /* Product String Descriptor "CDC-ACM" */ |
| 0x10, |
| USB_STRING_DESC, |
| 'C', 0, 'D', 0, 'C', 0, '-', 0, 'A', 0, 'C', 0, 'M', 0, |
| |
| /* Serial Number String Descriptor "00.01" */ |
| 0x0C, |
| USB_STRING_DESC, |
| '0', 0, '0', 0, '.', 0, '0', 0, '1', 0, |
| }; |
| |
| /** |
| * @brief Handler called for Class requests not handled by the USB stack. |
| * |
| * @param pSetup Information about the request to execute. |
| * @param len Size of the buffer. |
| * @param data Buffer containing the request result. |
| * |
| * @return 0 on success, negative errno code on fail. |
| */ |
| int cdc_acm_class_handle_req(struct usb_setup_packet *pSetup, |
| int32_t *len, uint8_t **data) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(cdc_acm_dev); |
| |
| switch (pSetup->bRequest) { |
| case CDC_SET_LINE_CODING: |
| memcpy(&dev_data->line_coding, |
| *data, sizeof(dev_data->line_coding)); |
| SYS_LOG_DBG("\nCDC_SET_LINE_CODING %d %d %d %d", |
| sys_le32_to_cpu(dev_data->line_coding.dwDTERate), |
| dev_data->line_coding.bCharFormat, |
| dev_data->line_coding.bParityType, |
| dev_data->line_coding.bDataBits); |
| break; |
| |
| case CDC_SET_CONTROL_LINE_STATE: |
| dev_data->line_state = (uint8_t)sys_le16_to_cpu(pSetup->wValue); |
| SYS_LOG_DBG("CDC_SET_CONTROL_LINE_STATE 0x%x", |
| dev_data->line_state); |
| break; |
| |
| case CDC_GET_LINE_CODING: |
| *data = (uint8_t *)(&dev_data->line_coding); |
| *len = sizeof(dev_data->line_coding); |
| SYS_LOG_DBG("\nCDC_GET_LINE_CODING %d %d %d %d", |
| sys_le32_to_cpu(dev_data->line_coding.dwDTERate), |
| dev_data->line_coding.bCharFormat, |
| dev_data->line_coding.bParityType, |
| dev_data->line_coding.bDataBits); |
| break; |
| |
| default: |
| SYS_LOG_DBG("CDC ACM request 0x%x, value 0x%x", |
| pSetup->bRequest, pSetup->wValue); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * @brief EP Bulk IN handler, used to send data to the Host |
| * |
| * @param ep Endpoint address. |
| * @param ep_status Endpoint status code. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_bulk_in(uint8_t ep, enum usb_dc_ep_cb_status_code ep_status) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(cdc_acm_dev); |
| |
| dev_data->tx_ready = 1; |
| nano_sem_give(&poll_wait_sem); |
| /* Call callback only if tx irq ena */ |
| if (dev_data->cb && dev_data->tx_irq_ena) |
| dev_data->cb(cdc_acm_dev); |
| } |
| |
| /** |
| * @brief EP Bulk OUT handler, used to read the data received from the Host |
| * |
| * @param ep Endpoint address. |
| * @param ep_status Endpoint status code. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_bulk_out(uint8_t ep, |
| enum usb_dc_ep_cb_status_code ep_status) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(cdc_acm_dev); |
| uint32_t bytes_to_read, i, j, buf_head; |
| uint8_t tmp_buf[4]; |
| |
| /* Check how many bytes were received */ |
| usb_read(ep, NULL, 0, &bytes_to_read); |
| |
| buf_head = dev_data->rx_buf_head; |
| |
| /* |
| * Quark SE USB controller is always storing data |
| * in the FIFOs per 32-bit words. |
| */ |
| for (i = 0; i < bytes_to_read; i += 4) { |
| usb_read(ep, tmp_buf, 4, NULL); |
| for (j = 0; j < 4; j++) { |
| if (i + j == bytes_to_read) { |
| /* We read all the data */ |
| break; |
| } |
| |
| if (((buf_head + 1) % CDC_ACM_BUFFER_SIZE) == |
| dev_data->rx_buf_tail) { |
| /* FIFO full, discard data */ |
| SYS_LOG_ERR("CDC buffer full!"); |
| } else { |
| dev_data->rx_buf[buf_head] = tmp_buf[j]; |
| buf_head = (buf_head + 1) % CDC_ACM_BUFFER_SIZE; |
| } |
| } |
| } |
| |
| dev_data->rx_buf_head = buf_head; |
| dev_data->rx_ready = 1; |
| /* Call callback only if rx irq ena */ |
| if (dev_data->cb && dev_data->rx_irq_ena) |
| dev_data->cb(cdc_acm_dev); |
| } |
| |
| /** |
| * @brief EP Interrupt handler |
| * |
| * @param ep Endpoint address. |
| * @param ep_status Endpoint status code. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_int_in(uint8_t ep, enum usb_dc_ep_cb_status_code ep_status) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(cdc_acm_dev); |
| |
| dev_data->notification_sent = 1; |
| SYS_LOG_DBG("CDC_IntIN EP[%x]\r", ep); |
| } |
| |
| /** |
| * @brief Callback used to know the USB connection status |
| * |
| * @param status USB device status code. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_dev_status_cb(enum usb_dc_status_code status) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(cdc_acm_dev); |
| |
| /* Store the new status */ |
| dev_data->usb_status = status; |
| |
| /* Check the USB status and do needed action if required */ |
| switch (status) { |
| case USB_DC_ERROR: |
| SYS_LOG_DBG("USB device error"); |
| break; |
| case USB_DC_RESET: |
| SYS_LOG_DBG("USB device reset detected"); |
| break; |
| case USB_DC_CONNECTED: |
| SYS_LOG_DBG("USB device connected"); |
| break; |
| case USB_DC_CONFIGURED: |
| SYS_LOG_DBG("USB device configured"); |
| break; |
| case USB_DC_DISCONNECTED: |
| SYS_LOG_DBG("USB device disconnected"); |
| break; |
| case USB_DC_SUSPEND: |
| SYS_LOG_DBG("USB device supended"); |
| break; |
| case USB_DC_RESUME: |
| SYS_LOG_DBG("USB device resumed"); |
| break; |
| case USB_DC_UNKNOWN: |
| default: |
| SYS_LOG_DBG("USB unknown state"); |
| break; |
| } |
| } |
| |
| /* Describe EndPoints configuration */ |
| static struct usb_ep_cfg_data cdc_acm_ep_data[] = { |
| { |
| .ep_cb = cdc_acm_int_in, |
| .ep_addr = CDC_ENDP_INT |
| }, |
| { |
| .ep_cb = cdc_acm_bulk_out, |
| .ep_addr = CDC_ENDP_OUT |
| }, |
| { |
| .ep_cb = cdc_acm_bulk_in, |
| .ep_addr = CDC_ENDP_IN |
| } |
| }; |
| |
| /* Configuration of the CDC-ACM Device send to the USB Driver */ |
| static struct usb_cfg_data cdc_acm_config = { |
| .usb_device_description = cdc_acm_usb_description, |
| .cb_usb_status = cdc_acm_dev_status_cb, |
| .interface = { |
| .class_handler = cdc_acm_class_handle_req, |
| .custom_handler = NULL, |
| .payload_data = NULL, |
| }, |
| .num_endpoints = CDC1_NUM_EP + CDC2_NUM_EP, |
| .endpoint = cdc_acm_ep_data |
| }; |
| |
| /** |
| * @brief Set the baud rate |
| * |
| * This routine set the given baud rate for the UART. |
| * |
| * @param dev CDC ACM device struct. |
| * @param baudrate Baud rate. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_baudrate_set(struct device *dev, uint32_t baudrate) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| dev_data->line_coding.dwDTERate = sys_cpu_to_le32(baudrate); |
| } |
| |
| /** |
| * @brief Initialize UART channel |
| * |
| * This routine is called to reset the chip in a quiescent state. |
| * It is assumed that this function is called only once per UART. |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return 0 allways. |
| */ |
| static int cdc_acm_init(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| int ret; |
| |
| cdc_acm_config.interface.payload_data = dev_data->interface_data; |
| cdc_acm_dev = dev; |
| |
| /* Initialize the USB driver with the right configuration */ |
| ret = usb_set_config(&cdc_acm_config); |
| if (ret < 0) { |
| SYS_LOG_ERR("Failed to config USB"); |
| return ret; |
| } |
| |
| /* Enable USB driver */ |
| ret = usb_enable(&cdc_acm_config); |
| if (ret < 0) { |
| SYS_LOG_ERR("Failed to enable USB"); |
| return ret; |
| } |
| |
| dev->driver_api = &cdc_acm_driver_api; |
| nano_sem_init(&poll_wait_sem); |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Fill FIFO with data |
| * |
| * @param dev CDC ACM device struct. |
| * @param tx_data Data to transmit. |
| * @param len Number of bytes to send. |
| * |
| * @return Number of bytes sent. |
| */ |
| static int cdc_acm_fifo_fill(struct device *dev, |
| const uint8_t *tx_data, int len) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| uint32_t bytes_written = 0; |
| |
| if (dev_data->usb_status != USB_DC_CONFIGURED) |
| return 0; |
| |
| dev_data->tx_ready = 0; |
| usb_write(CDC_ENDP_IN, tx_data, len, &bytes_written); |
| |
| return bytes_written; |
| } |
| |
| /** |
| * @brief Read data from FIFO |
| * |
| * @param dev CDC ACM device struct. |
| * @param rx_data Pointer to data container. |
| * @param size Container size. |
| * |
| * @return Number of bytes read. |
| */ |
| static int cdc_acm_fifo_read(struct device *dev, uint8_t *rx_data, |
| const int size) |
| { |
| uint32_t avail_data, bytes_read, i; |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| avail_data = (CDC_ACM_BUFFER_SIZE + dev_data->rx_buf_head - |
| dev_data->rx_buf_tail) % CDC_ACM_BUFFER_SIZE; |
| if (avail_data > size) |
| bytes_read = size; |
| else |
| bytes_read = avail_data; |
| |
| for (i = 0; i < bytes_read; i++) |
| rx_data[i] = dev_data->rx_buf[(dev_data->rx_buf_tail + i) % |
| CDC_ACM_BUFFER_SIZE]; |
| |
| dev_data->rx_buf_tail = (dev_data->rx_buf_tail + bytes_read) % |
| CDC_ACM_BUFFER_SIZE; |
| |
| if (dev_data->rx_buf_tail == dev_data->rx_buf_head) { |
| /* Buffer empty */ |
| dev_data->rx_ready = 0; |
| } |
| |
| return bytes_read; |
| } |
| |
| /** |
| * @brief Enable TX interrupt |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_irq_tx_enable(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| dev_data->tx_irq_ena = 1; |
| } |
| |
| /** |
| * @brief Disable TX interrupt |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_irq_tx_disable(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| dev_data->tx_irq_ena = 0; |
| } |
| |
| /** |
| * @brief Check if Tx IRQ has been raised |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return 1 if a Tx IRQ is pending, 0 otherwise. |
| */ |
| static int cdc_acm_irq_tx_ready(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| if (dev_data->tx_ready) { |
| dev_data->tx_ready = 0; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Enable RX interrupt |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return N/A |
| */ |
| static void cdc_acm_irq_rx_enable(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| dev_data->rx_irq_ena = 1; |
| } |
| |
| /** |
| * @brief Disable RX interrupt |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return N/A. |
| */ |
| static void cdc_acm_irq_rx_disable(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| dev_data->rx_irq_ena = 0; |
| } |
| |
| /** |
| * @brief Check if Rx IRQ has been raised |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return 1 if an IRQ is ready, 0 otherwise. |
| */ |
| static int cdc_acm_irq_rx_ready(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| if (dev_data->rx_ready) { |
| dev_data->rx_ready = 0; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Check if Tx or Rx IRQ is pending |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return 1 if a Tx or Rx IRQ is pending, 0 otherwise. |
| */ |
| static int cdc_acm_irq_is_pending(struct device *dev) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| if (dev_data->tx_ready || dev_data->rx_ready) |
| return 1; |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Update IRQ status |
| * |
| * @param dev CDC ACM device struct. |
| * |
| * @return Always 1 |
| */ |
| static int cdc_acm_irq_update(struct device *dev) |
| { |
| return 1; |
| } |
| |
| /** |
| * @brief Set the callback function pointer for IRQ. |
| * |
| * @param dev CDC ACM device struct. |
| * @param cb Callback function pointer. |
| * |
| * @return N/A |
| */ |
| static void cdc_acm_irq_callback_set(struct device *dev, |
| uart_irq_callback_t cb) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| dev_data->cb = cb; |
| } |
| |
| #ifdef CONFIG_UART_LINE_CTRL |
| |
| /** |
| * @brief Send serial line state notification to the Host |
| * |
| * This routine sends asynchronous notification of UART status |
| * on the interrupt endpoint |
| * |
| * @param dev CDC ACM device struct. |
| * @param ep_status Endpoint status code. |
| * |
| * @return N/A. |
| */ |
| static int cdc_acm_send_notification(struct device *dev, uint16_t serial_state) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| struct cdc_acm_notification notification; |
| uint32_t cnt = 0; |
| |
| notification.bmRequestType = 0xA1; |
| notification.bNotificationType = 0x20; |
| notification.wValue = 0; |
| notification.wIndex = 0; |
| notification.wLength = sys_cpu_to_le16(sizeof(serial_state)); |
| notification.data = sys_cpu_to_le16(serial_state); |
| |
| dev_data->notification_sent = 0; |
| usb_write(CDC_ENDP_INT, (const uint8_t *)¬ification, |
| sizeof(notification), NULL); |
| |
| /* Wait for notification to be sent */ |
| while (!((volatile uint8_t)dev_data->notification_sent)) { |
| sys_thread_busy_wait(1); |
| if (++cnt > CDC_CONTROL_SERIAL_STATE_TIMEOUT_US) { |
| SYS_LOG_DBG("CDC ACM notification timeout!"); |
| return -EIO; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Manipulate line control for UART. |
| * |
| * @param dev CDC ACM device struct |
| * @param ctrl The line control to be manipulated |
| * @param val Value to set the line control |
| * |
| * @return 0 if successful, failed otherwise. |
| */ |
| static int cdc_acm_line_ctrl_set(struct device *dev, |
| uint32_t ctrl, uint32_t val) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| switch (ctrl) { |
| case LINE_CTRL_BAUD_RATE: |
| cdc_acm_baudrate_set(dev, val); |
| return 0; |
| case LINE_CTRL_DCD: |
| dev_data->serial_state &= ~CDC_CONTROL_SERIAL_STATE_DCD; |
| if (val) |
| dev_data->serial_state |= CDC_CONTROL_SERIAL_STATE_DCD; |
| |
| cdc_acm_send_notification(dev, CDC_CONTROL_SERIAL_STATE_DCD); |
| return 0; |
| case LINE_CTRL_DSR: |
| dev_data->serial_state &= ~CDC_CONTROL_SERIAL_STATE_DSR; |
| if (val) |
| dev_data->serial_state |= CDC_CONTROL_SERIAL_STATE_DSR; |
| |
| cdc_acm_send_notification(dev, dev_data->serial_state); |
| return 0; |
| default: |
| return -ENODEV; |
| } |
| |
| return -ENOTSUP; |
| } |
| |
| /** |
| * @brief Manipulate line control for UART. |
| * |
| * @param dev CDC ACM device struct |
| * @param ctrl The line control to be manipulated |
| * @param val Value to set the line control |
| * |
| * @return 0 if successful, failed otherwise. |
| */ |
| static int cdc_acm_line_ctrl_get(struct device *dev, |
| uint32_t ctrl, uint32_t *val) |
| { |
| struct cdc_acm_dev_data_t * const dev_data = DEV_DATA(dev); |
| |
| switch (ctrl) { |
| case LINE_CTRL_BAUD_RATE: |
| *val = sys_le32_to_cpu(dev_data->line_coding.dwDTERate); |
| return 0; |
| case LINE_CTRL_RTS: |
| *val = |
| (dev_data->line_state & CDC_CONTROL_LINE_STATE_RTS) ? 1 : 0; |
| return 0; |
| case LINE_CTRL_DTR: |
| *val = |
| (dev_data->line_state & CDC_CONTROL_LINE_STATE_DTR) ? 1 : 0; |
| return 0; |
| } |
| |
| return -ENOTSUP; |
| } |
| |
| #endif /* CONFIG_UART_LINE_CTRL */ |
| |
| /* |
| * @brief Poll the device for input. |
| * |
| * @return -ENOTSUP Since underlying USB device controller always uses |
| * interrupts, polled mode UART APIs are not implemented for the UART interface |
| * exported by CDC ACM driver. Apps should use fifo_read API instead. |
| */ |
| |
| static int cdc_acm_poll_in(struct device *dev, unsigned char *c) |
| { |
| return -ENOTSUP; |
| } |
| |
| /* |
| * @brief Output a character in polled mode. |
| * |
| * The UART poll method for USB UART is simulated by waiting till |
| * we get the next BULK In upcall from the USB device controller or 100 ms. |
| * |
| * @return the same character which is sent |
| */ |
| static unsigned char cdc_acm_poll_out(struct device *dev, |
| unsigned char c) |
| { |
| cdc_acm_fifo_fill(dev, &c, 1); |
| nano_sem_take(&poll_wait_sem, MSEC(100)); |
| |
| return c; |
| } |
| |
| static struct uart_driver_api cdc_acm_driver_api = { |
| .poll_in = cdc_acm_poll_in, |
| .poll_out = cdc_acm_poll_out, |
| .fifo_fill = cdc_acm_fifo_fill, |
| .fifo_read = cdc_acm_fifo_read, |
| .irq_tx_enable = cdc_acm_irq_tx_enable, |
| .irq_tx_disable = cdc_acm_irq_tx_disable, |
| .irq_tx_ready = cdc_acm_irq_tx_ready, |
| .irq_rx_enable = cdc_acm_irq_rx_enable, |
| .irq_rx_disable = cdc_acm_irq_rx_disable, |
| .irq_rx_ready = cdc_acm_irq_rx_ready, |
| .irq_is_pending = cdc_acm_irq_is_pending, |
| .irq_update = cdc_acm_irq_update, |
| .irq_callback_set = cdc_acm_irq_callback_set, |
| #ifdef CONFIG_UART_LINE_CTRL |
| .line_ctrl_set = cdc_acm_line_ctrl_set, |
| .line_ctrl_get = cdc_acm_line_ctrl_get, |
| #endif /* CONFIG_UART_LINE_CTRL */ |
| }; |
| |
| static struct cdc_acm_dev_data_t cdc_acm_dev_data = { |
| .usb_status = USB_DC_UNKNOWN, |
| .line_coding = CDC_ACM_DEFAUL_BAUDRATE, |
| }; |
| |
| DEVICE_INIT(cdc_acm, CONFIG_CDC_ACM_PORT_NAME, &cdc_acm_init, |
| &cdc_acm_dev_data, NULL, |
| APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEVICE); |