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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Driver for the NXP ISP1761 device controller
4 *
5 * Copyright 2021 Linaro, Rui Miguel Silva
6 * Copyright 2014 Ideas on Board Oy
7 *
8 * Contacts:
9 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 * Rui Miguel Silva <rui.silva@linaro.org>
11 */
12
13#ifndef _ISP1760_UDC_H_
14#define _ISP1760_UDC_H_
15
16#include <linux/ioport.h>
17#include <linux/list.h>
18#include <linux/spinlock.h>
19#include <linux/timer.h>
20#include <linux/usb/gadget.h>
21
22#include "isp1760-regs.h"
23
24struct isp1760_device;
25struct isp1760_udc;
26
27enum isp1760_ctrl_state {
28 ISP1760_CTRL_SETUP, /* Waiting for a SETUP transaction */
29 ISP1760_CTRL_DATA_IN, /* Setup received, data IN stage */
30 ISP1760_CTRL_DATA_OUT, /* Setup received, data OUT stage */
31 ISP1760_CTRL_STATUS, /* 0-length request in status stage */
32};
33
34struct isp1760_ep {
35 struct isp1760_udc *udc;
36 struct usb_ep ep;
37
38 struct list_head queue;
39
40 unsigned int addr;
41 unsigned int maxpacket;
42 char name[7];
43
44 const struct usb_endpoint_descriptor *desc;
45
46 bool rx_pending;
47 bool halted;
48 bool wedged;
49};
50
51/**
52 * struct isp1760_udc - UDC state information
53 * irq: IRQ number
54 * irqname: IRQ name (as passed to request_irq)
55 * regs: regmap for UDC registers
56 * driver: Gadget driver
57 * gadget: Gadget device
58 * lock: Protects driver, vbus_timer, ep, ep0_*, DC_EPINDEX register
59 * ep: Array of endpoints
60 * ep0_state: Control request state for endpoint 0
61 * ep0_dir: Direction of the current control request
62 * ep0_length: Length of the current control request
63 * connected: Tracks gadget driver bus connection state
64 */
65struct isp1760_udc {
66 struct isp1760_device *isp;
67
68 int irq;
69 char *irqname;
70
71 struct regmap *regs;
72 struct regmap_field *fields[DC_FIELD_MAX];
73
74 struct usb_gadget_driver *driver;
75 struct usb_gadget gadget;
76
77 spinlock_t lock;
78 struct timer_list vbus_timer;
79
80 struct isp1760_ep ep[15];
81
82 enum isp1760_ctrl_state ep0_state;
83 u8 ep0_dir;
84 u16 ep0_length;
85
86 bool connected;
87 bool is_isp1763;
88
89 unsigned int devstatus;
90};
91
92#ifdef CONFIG_USB_ISP1761_UDC
93int isp1760_udc_register(struct isp1760_device *isp, int irq,
94 unsigned long irqflags);
95void isp1760_udc_unregister(struct isp1760_device *isp);
96#else
97static inline int isp1760_udc_register(struct isp1760_device *isp, int irq,
98 unsigned long irqflags)
99{
100 return 0;
101}
102
103static inline void isp1760_udc_unregister(struct isp1760_device *isp)
104{
105}
106#endif
107
108#endif
1/*
2 * Driver for the NXP ISP1761 device controller
3 *
4 * Copyright 2014 Ideas on Board Oy
5 *
6 * Contacts:
7 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 */
13
14#ifndef _ISP1760_UDC_H_
15#define _ISP1760_UDC_H_
16
17#include <linux/ioport.h>
18#include <linux/list.h>
19#include <linux/spinlock.h>
20#include <linux/timer.h>
21#include <linux/usb/gadget.h>
22
23struct isp1760_device;
24struct isp1760_udc;
25
26enum isp1760_ctrl_state {
27 ISP1760_CTRL_SETUP, /* Waiting for a SETUP transaction */
28 ISP1760_CTRL_DATA_IN, /* Setup received, data IN stage */
29 ISP1760_CTRL_DATA_OUT, /* Setup received, data OUT stage */
30 ISP1760_CTRL_STATUS, /* 0-length request in status stage */
31};
32
33struct isp1760_ep {
34 struct isp1760_udc *udc;
35 struct usb_ep ep;
36
37 struct list_head queue;
38
39 unsigned int addr;
40 unsigned int maxpacket;
41 char name[7];
42
43 const struct usb_endpoint_descriptor *desc;
44
45 bool rx_pending;
46 bool halted;
47 bool wedged;
48};
49
50/**
51 * struct isp1760_udc - UDC state information
52 * irq: IRQ number
53 * irqname: IRQ name (as passed to request_irq)
54 * regs: Base address of the UDC registers
55 * driver: Gadget driver
56 * gadget: Gadget device
57 * lock: Protects driver, vbus_timer, ep, ep0_*, DC_EPINDEX register
58 * ep: Array of endpoints
59 * ep0_state: Control request state for endpoint 0
60 * ep0_dir: Direction of the current control request
61 * ep0_length: Length of the current control request
62 * connected: Tracks gadget driver bus connection state
63 */
64struct isp1760_udc {
65#ifdef CONFIG_USB_ISP1761_UDC
66 struct isp1760_device *isp;
67
68 int irq;
69 char *irqname;
70 void __iomem *regs;
71
72 struct usb_gadget_driver *driver;
73 struct usb_gadget gadget;
74
75 spinlock_t lock;
76 struct timer_list vbus_timer;
77
78 struct isp1760_ep ep[15];
79
80 enum isp1760_ctrl_state ep0_state;
81 u8 ep0_dir;
82 u16 ep0_length;
83
84 bool connected;
85
86 unsigned int devstatus;
87#endif
88};
89
90#ifdef CONFIG_USB_ISP1761_UDC
91int isp1760_udc_register(struct isp1760_device *isp, int irq,
92 unsigned long irqflags);
93void isp1760_udc_unregister(struct isp1760_device *isp);
94#else
95static inline int isp1760_udc_register(struct isp1760_device *isp, int irq,
96 unsigned long irqflags)
97{
98 return 0;
99}
100
101static inline void isp1760_udc_unregister(struct isp1760_device *isp)
102{
103}
104#endif
105
106#endif