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/**
 * @file
 * @brief CDC ACM device class driver header file
 *
 * Header file for USB CDC ACM device class driver
 */

#ifndef __CDC_ACM_H__
#define __CDC_ACM_H__

/* Data structure for GET_LINE_CODING / SET_LINE_CODING class requests */
struct cdc_acm_line_coding {
	u32_t dwDTERate;
	u8_t bCharFormat;
	u8_t bParityType;
	u8_t bDataBits;
} __packed;

struct cdc_acm_notification {
	u8_t bmRequestType;
	u8_t bNotificationType;
	u16_t wValue;
	u16_t wIndex;
	u16_t wLength;
	u16_t data;
} __packed;

/* Intel vendor ID */
#define CDC_VENDOR_ID	0x8086

/* Product Id, random value */
#define CDC_PRODUCT_ID	0xF8A1


/* Max packet size for Bulk endpoints */
#define CDC_BULK_EP_MPS		64

/* Max packet size for Interrupt endpoints */
#define CDC_INTERRUPT_EP_MPS	16

/* Max CDC ACM class request max data size */
#define CDC_CLASS_REQ_MAX_DATA_SIZE	8

/* Number of configurations for the USB Device */
#define CDC_NUM_CONF	0x01
/* Number of interfaces in the configuration */
#define CDC_NUM_ITF		0x02
/* Number of Endpoints in the first interface */
#define CDC1_NUM_EP		0x01
/* Number of Endpoints in the second interface */
#define CDC2_NUM_EP		0x02

#define CDC_ENDP_INT	0x81
#define CDC_ENDP_OUT	0x03
#define CDC_ENDP_IN		0x82

/* Decriptor size in bytes */
#define USB_HFUNC_DESC_SIZE		5 /* Header Functional Descriptor */
#define USB_CMFUNC_DESC_SIZE	5 /* Call Management Functional Descriptor */
#define USB_ACMFUNC_DESC_SIZE	4 /* ACM Functional Descriptor */
#define USB_UFUNC_DESC_SIZE		5 /* Union Functional Descriptor */

/* Descriptor type */
#define CS_INTERFACE		0x24
#define CS_ENDPOINT			0x25

/* Descriptor subtype */
#define USB_HFUNC_SUBDESC	0x00
#define USB_CMFUNC_SUBDESC	0x01
#define USB_ACMFUNC_SUBDESC	0x02
#define USB_UFUNC_SUBDESC	0x06

/* Class specific request */
#define CDC_SET_LINE_CODING			0x20
#define CDC_GET_LINE_CODING			0x21
#define CDC_SET_CONTROL_LINE_STATE	0x22

/* Control line state signal bitmap */
#define CDC_CONTROL_LINE_STATE_DTR	0x1
#define CDC_CONTROL_LINE_STATE_RTS	0x2

/* Serial state notification bitmap*/
#define CDC_CONTROL_SERIAL_STATE_DCD	0x1
#define CDC_CONTROL_SERIAL_STATE_DSR	0x2

/* Serial state notification timeout */
#define CDC_CONTROL_SERIAL_STATE_TIMEOUT_US 100000

/* Size in bytes of the configuration sent to
 * the Host on GetConfiguration() request
 * For Communication Device: CONF + (2 x ITF) +
 * (3 x EP) + HF + CMF + ACMF + UF -> 67 bytes
 */
#define CDC_CONF_SIZE   (USB_CONFIGURATION_DESC_SIZE + \
	(2 * USB_INTERFACE_DESC_SIZE) + (3 * USB_ENDPOINT_DESC_SIZE) + 19)

#endif /* __CDC_ACM_H__ */