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Lukasz Dalek3c09a282012-10-02 17:04:32 +02001/*
2 * Intel PXA25x on-chip full speed USB device controller
3 *
4 * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
5 * Copyright (C) 2003 David Brownell
6 * Copyright (C) 2012 Lukasz Dalek <luk0104@gmail.com>
7 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02008 * SPDX-License-Identifier: GPL-2.0+
Lukasz Dalek3c09a282012-10-02 17:04:32 +02009 */
10
11#ifndef __LINUX_USB_GADGET_PXA25X_H
12#define __LINUX_USB_GADGET_PXA25X_H
13
14#include <linux/types.h>
15#include <asm/arch/regs-usb.h>
16
17/*
18 * Prefetching support - only ARMv5.
19 */
20
21#ifdef ARCH_HAS_PREFETCH
22static inline void prefetch(const void *ptr)
23{
24 __asm__ __volatile__(
25 "pld\t%a0"
26 :
27 : "p" (ptr)
28 : "cc");
29}
30
31#define prefetchw(ptr) prefetch(ptr)
32#endif /* ARCH_HAS_PREFETCH */
33
34/*-------------------------------------------------------------------------*/
35
36#define UDC_REGS ((struct pxa25x_udc_regs *)PXA25X_UDC_BASE)
37
38/*-------------------------------------------------------------------------*/
39
40struct pxa2xx_udc_mach_info {
41 int (*udc_is_connected)(void); /* do we see host? */
42 void (*udc_command)(int cmd);
43#define PXA2XX_UDC_CMD_CONNECT 0 /* let host see us */
44#define PXA2XX_UDC_CMD_DISCONNECT 1 /* so host won't see us */
45};
46
47struct pxa25x_udc;
48
49struct pxa25x_ep {
50 struct usb_ep ep;
51 struct pxa25x_udc *dev;
52
53 const struct usb_endpoint_descriptor *desc;
54 struct list_head queue;
55 unsigned long pio_irqs;
56
57 unsigned short fifo_size;
58 u8 bEndpointAddress;
59 u8 bmAttributes;
60
61 unsigned stopped:1;
62
63 /* UDCCS = UDC Control/Status for this EP
64 * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
65 * UDDR = UDC Endpoint Data Register (the fifo)
66 * DRCM = DMA Request Channel Map
67 */
68 u32 *reg_udccs;
69 u32 *reg_ubcr;
70 u32 *reg_uddr;
71};
72
73struct pxa25x_request {
74 struct usb_request req;
75 struct list_head queue;
76};
77
78enum ep0_state {
79 EP0_IDLE,
80 EP0_IN_DATA_PHASE,
81 EP0_OUT_DATA_PHASE,
82 EP0_END_XFER,
83 EP0_STALL,
84};
85
86#define EP0_FIFO_SIZE 16U
87#define BULK_FIFO_SIZE 64U
88#define ISO_FIFO_SIZE 256U
89#define INT_FIFO_SIZE 8U
90
91struct udc_stats {
92 struct ep0stats {
93 unsigned long ops;
94 unsigned long bytes;
95 } read, write;
96 unsigned long irqs;
97};
98
99#ifdef CONFIG_USB_PXA25X_SMALL
100/* when memory's tight, SMALL config saves code+data. */
101#define PXA_UDC_NUM_ENDPOINTS 3
102#endif
103
104#ifndef PXA_UDC_NUM_ENDPOINTS
105#define PXA_UDC_NUM_ENDPOINTS 16
106#endif
107
108struct pxa25x_watchdog {
109 unsigned running:1;
110 ulong period;
111 ulong base;
112 struct pxa25x_udc *udc;
113
114 void (*function)(struct pxa25x_udc *udc);
115};
116
117struct pxa25x_udc {
118 struct usb_gadget gadget;
119 struct usb_gadget_driver *driver;
120 struct pxa25x_udc_regs *regs;
121
122 enum ep0_state ep0state;
123 struct udc_stats stats;
124 unsigned got_irq:1,
125 pullup:1,
126 has_cfr:1,
127 req_pending:1,
128 req_std:1,
129 req_config:1,
130 active:1;
131
132 struct clk *clk;
133 struct pxa2xx_udc_mach_info *mach;
134 u64 dma_mask;
135 struct pxa25x_ep ep[PXA_UDC_NUM_ENDPOINTS];
136
137 struct pxa25x_watchdog watchdog;
138};
139
140/*-------------------------------------------------------------------------*/
141
142static struct pxa25x_udc *the_controller;
143
144/*-------------------------------------------------------------------------*/
145
146#ifndef DEBUG
147# define NOISY 0
148#endif
149
150#endif /* __LINUX_USB_GADGET_PXA25X_H */