1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2025 Nuvoton Technology Corp.
4 *
5 * Nuvoton NCT6694 USB transaction and data structure.
6 */
7
8#ifndef __MFD_NCT6694_H
9#define __MFD_NCT6694_H
10
11#define NCT6694_VENDOR_ID 0x0416
12#define NCT6694_PRODUCT_ID 0x200B
13#define NCT6694_INT_IN_EP 0x81
14#define NCT6694_BULK_IN_EP 0x02
15#define NCT6694_BULK_OUT_EP 0x03
16
17#define NCT6694_HCTRL_SET 0x40
18#define NCT6694_HCTRL_GET 0x80
19
20#define NCT6694_URB_TIMEOUT 1000
21
22enum nct6694_irq_id {
23 NCT6694_IRQ_GPIO0 = 0,
24 NCT6694_IRQ_GPIO1,
25 NCT6694_IRQ_GPIO2,
26 NCT6694_IRQ_GPIO3,
27 NCT6694_IRQ_GPIO4,
28 NCT6694_IRQ_GPIO5,
29 NCT6694_IRQ_GPIO6,
30 NCT6694_IRQ_GPIO7,
31 NCT6694_IRQ_GPIO8,
32 NCT6694_IRQ_GPIO9,
33 NCT6694_IRQ_GPIOA,
34 NCT6694_IRQ_GPIOB,
35 NCT6694_IRQ_GPIOC,
36 NCT6694_IRQ_GPIOD,
37 NCT6694_IRQ_GPIOE,
38 NCT6694_IRQ_GPIOF,
39 NCT6694_IRQ_CAN0,
40 NCT6694_IRQ_CAN1,
41 NCT6694_IRQ_RTC,
42 NCT6694_NR_IRQS,
43};
44
45enum nct6694_response_err_status {
46 NCT6694_NO_ERROR = 0,
47 NCT6694_FORMAT_ERROR,
48 NCT6694_RESERVED1,
49 NCT6694_RESERVED2,
50 NCT6694_NOT_SUPPORT_ERROR,
51 NCT6694_NO_RESPONSE_ERROR,
52 NCT6694_TIMEOUT_ERROR,
53 NCT6694_PENDING,
54};
55
56struct __packed nct6694_cmd_header {
57 u8 rsv1;
58 u8 mod;
59 union __packed {
60 __le16 offset;
61 struct __packed {
62 u8 cmd;
63 u8 sel;
64 };
65 };
66 u8 hctrl;
67 u8 rsv2;
68 __le16 len;
69};
70
71struct __packed nct6694_response_header {
72 u8 sequence_id;
73 u8 sts;
74 u8 reserved[4];
75 __le16 len;
76};
77
78union __packed nct6694_usb_msg {
79 struct nct6694_cmd_header cmd_header;
80 struct nct6694_response_header response_header;
81};
82
83struct nct6694 {
84 struct device *dev;
85 struct ida gpio_ida;
86 struct ida i2c_ida;
87 struct ida canfd_ida;
88 struct ida wdt_ida;
89 struct irq_domain *domain;
90 struct mutex access_lock;
91 spinlock_t irq_lock;
92 struct urb *int_in_urb;
93 struct usb_device *udev;
94 union nct6694_usb_msg *usb_msg;
95 __le32 *int_buffer;
96 unsigned int irq_enable;
97};
98
99int nct6694_read_msg(struct nct6694 *nct6694, const struct nct6694_cmd_header *cmd_hd, void *buf);
100int nct6694_write_msg(struct nct6694 *nct6694, const struct nct6694_cmd_header *cmd_hd, void *buf);
101
102#endif
103

source code of linux/include/linux/mfd/nct6694.h