1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Intel PXA25x on-chip full speed USB device controller
4 *
5 * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
6 * Copyright (C) 2003 David Brownell
7 * Copyright (C) 2012 Lukasz Dalek <luk0104@gmail.com>
8 */
9
10 #ifndef __LINUX_USB_GADGET_PXA25X_H
11 #define __LINUX_USB_GADGET_PXA25X_H
12
13 #include <linux/types.h>
14 #include <asm/arch/regs-usb.h>
15
16 /*
17 * Prefetching support - only ARMv5.
18 */
19
20 #ifdef ARCH_HAS_PREFETCH
prefetch(const void * ptr)21 static inline void prefetch(const void *ptr)
22 {
23 __asm__ __volatile__(
24 "pld\t%a0"
25 :
26 : "p" (ptr)
27 : "cc");
28 }
29
30 #define prefetchw(ptr) prefetch(ptr)
31 #endif /* ARCH_HAS_PREFETCH */
32
33 /*-------------------------------------------------------------------------*/
34
35 #define UDC_REGS ((struct pxa25x_udc_regs *)PXA25X_UDC_BASE)
36
37 /*-------------------------------------------------------------------------*/
38
39 struct pxa2xx_udc_mach_info {
40 int (*udc_is_connected)(void); /* do we see host? */
41 void (*udc_command)(int cmd);
42 #define PXA2XX_UDC_CMD_CONNECT 0 /* let host see us */
43 #define PXA2XX_UDC_CMD_DISCONNECT 1 /* so host won't see us */
44 };
45
46 struct pxa25x_udc;
47
48 struct pxa25x_ep {
49 struct usb_ep ep;
50 struct pxa25x_udc *dev;
51
52 const struct usb_endpoint_descriptor *desc;
53 struct list_head queue;
54 unsigned long pio_irqs;
55
56 unsigned short fifo_size;
57 u8 bEndpointAddress;
58 u8 bmAttributes;
59
60 unsigned stopped:1;
61
62 /* UDCCS = UDC Control/Status for this EP
63 * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
64 * UDDR = UDC Endpoint Data Register (the fifo)
65 * DRCM = DMA Request Channel Map
66 */
67 u32 *reg_udccs;
68 u32 *reg_ubcr;
69 u32 *reg_uddr;
70 };
71
72 struct pxa25x_request {
73 struct usb_request req;
74 struct list_head queue;
75 };
76
77 enum ep0_state {
78 EP0_IDLE,
79 EP0_IN_DATA_PHASE,
80 EP0_OUT_DATA_PHASE,
81 EP0_END_XFER,
82 EP0_STALL,
83 };
84
85 #define EP0_FIFO_SIZE 16U
86 #define BULK_FIFO_SIZE 64U
87 #define ISO_FIFO_SIZE 256U
88 #define INT_FIFO_SIZE 8U
89
90 struct udc_stats {
91 struct ep0stats {
92 unsigned long ops;
93 unsigned long bytes;
94 } read, write;
95 unsigned long irqs;
96 };
97
98 #ifdef CONFIG_USB_PXA25X_SMALL
99 /* when memory's tight, SMALL config saves code+data. */
100 #define PXA_UDC_NUM_ENDPOINTS 3
101 #endif
102
103 #ifndef PXA_UDC_NUM_ENDPOINTS
104 #define PXA_UDC_NUM_ENDPOINTS 16
105 #endif
106
107 struct pxa25x_watchdog {
108 unsigned running:1;
109 ulong period;
110 ulong base;
111 struct pxa25x_udc *udc;
112
113 void (*function)(struct pxa25x_udc *udc);
114 };
115
116 struct pxa25x_udc {
117 struct usb_gadget gadget;
118 struct usb_gadget_driver *driver;
119 struct pxa25x_udc_regs *regs;
120
121 enum ep0_state ep0state;
122 struct udc_stats stats;
123 unsigned got_irq:1,
124 pullup:1,
125 has_cfr:1,
126 req_pending:1,
127 req_std:1,
128 req_config:1,
129 active:1;
130
131 struct clk *clk;
132 struct pxa2xx_udc_mach_info *mach;
133 u64 dma_mask;
134 struct pxa25x_ep ep[PXA_UDC_NUM_ENDPOINTS];
135
136 struct pxa25x_watchdog watchdog;
137 };
138
139 /*-------------------------------------------------------------------------*/
140
141 static struct pxa25x_udc *the_controller;
142
143 /*-------------------------------------------------------------------------*/
144
145 #ifndef DEBUG
146 # define NOISY 0
147 #endif
148
149 #endif /* __LINUX_USB_GADGET_PXA25X_H */
150