1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Designware DWC2 on-chip full/high speed USB device controllers
4  * Copyright (C) 2005 for Samsung Electronics
5  */
6 
7 #ifndef __DWC2_UDC_OTG_PRIV__
8 #define __DWC2_UDC_OTG_PRIV__
9 
10 #include <linux/errno.h>
11 #include <linux/sizes.h>
12 #include <linux/usb/ch9.h>
13 #include <linux/usb/gadget.h>
14 #include <linux/list.h>
15 #include <usb/dwc2_udc.h>
16 
17 /*-------------------------------------------------------------------------*/
18 /* DMA bounce buffer size, 16K is enough even for mass storage */
19 #define DMA_BUFFER_SIZE	(16*SZ_1K)
20 
21 #define EP0_FIFO_SIZE		64
22 #define EP_FIFO_SIZE		512
23 #define EP_FIFO_SIZE2		1024
24 /* ep0-control, ep1in-bulk, ep2out-bulk, ep3in-int */
25 #define DWC2_MAX_ENDPOINTS	4
26 #define DWC2_MAX_HW_ENDPOINTS	16
27 
28 #define WAIT_FOR_SETUP          0
29 #define DATA_STATE_XMIT         1
30 #define DATA_STATE_NEED_ZLP     2
31 #define WAIT_FOR_OUT_STATUS     3
32 #define DATA_STATE_RECV         4
33 #define WAIT_FOR_COMPLETE	5
34 #define WAIT_FOR_OUT_COMPLETE	6
35 #define WAIT_FOR_IN_COMPLETE	7
36 #define WAIT_FOR_NULL_COMPLETE	8
37 
38 #define TEST_J_SEL		0x1
39 #define TEST_K_SEL		0x2
40 #define TEST_SE0_NAK_SEL	0x3
41 #define TEST_PACKET_SEL		0x4
42 #define TEST_FORCE_ENABLE_SEL	0x5
43 
44 /* ************************************************************************* */
45 /* IO
46  */
47 
48 enum ep_type {
49 	ep_control, ep_bulk_in, ep_bulk_out, ep_interrupt
50 };
51 
52 struct dwc2_ep {
53 	struct usb_ep ep;
54 	struct dwc2_udc *dev;
55 
56 	const struct usb_endpoint_descriptor *desc;
57 	struct list_head queue;
58 	unsigned long pio_irqs;
59 	int len;
60 	void *dma_buf;
61 
62 	u8 stopped;
63 	u8 bEndpointAddress;
64 	u8 bmAttributes;
65 
66 	enum ep_type ep_type;
67 	int fifo_num;
68 };
69 
70 struct dwc2_request {
71 	struct usb_request req;
72 	struct list_head queue;
73 };
74 
75 struct dwc2_udc {
76 	struct usb_gadget gadget;
77 	struct usb_gadget_driver *driver;
78 
79 	struct dwc2_plat_otg_data *pdata;
80 
81 	int ep0state;
82 	struct dwc2_ep ep[DWC2_MAX_ENDPOINTS];
83 
84 	unsigned char usb_address;
85 
86 	unsigned req_pending:1, req_std:1;
87 };
88 
89 #define ep_is_in(EP) (((EP)->bEndpointAddress&USB_DIR_IN) == USB_DIR_IN)
90 #define ep_index(EP) ((EP)->bEndpointAddress&0xF)
91 #define ep_maxpacket(EP) ((EP)->ep.maxpacket)
92 
93 void otg_phy_init(struct dwc2_udc *dev);
94 void otg_phy_off(struct dwc2_udc *dev);
95 
96 #endif	/* __DWC2_UDC_OTG_PRIV__ */
97