summaryrefslogtreecommitdiff
path: root/drivers/usb/gadget/udc/at91_udc.h
blob: 01752466338164e898b48a511078c5b2252b15a7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/*
 * Copyright (C) 2004 by Thomas Rathbone, HP Labs
 * Copyright (C) 2005 by Ivan Kokshaysky
 * Copyright (C) 2006 by SAN People
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef AT91_UDC_H
#define AT91_UDC_H

/*
 * USB Device Port (UDP) registers.
 * Based on AT91RM9200 datasheet revision E.
 */

#define AT91_UDP_FRM_NUM	0x00		/* Frame Number Register */
#define     AT91_UDP_NUM	(0x7ff <<  0)	/* Frame Number */
#define     AT91_UDP_FRM_ERR	(1     << 16)	/* Frame Error */
#define     AT91_UDP_FRM_OK	(1     << 17)	/* Frame OK */

#define AT91_UDP_GLB_STAT	0x04		/* Global State Register */
#define     AT91_UDP_FADDEN	(1 <<  0)	/* Function Address Enable */
#define     AT91_UDP_CONFG	(1 <<  1)	/* Configured */
#define     AT91_UDP_ESR	(1 <<  2)	/* Enable Send Resume */
#define     AT91_UDP_RSMINPR	(1 <<  3)	/* Resume has been sent */
#define     AT91_UDP_RMWUPE	(1 <<  4)	/* Remote Wake Up Enable */

#define AT91_UDP_FADDR		0x08		/* Function Address Register */
#define     AT91_UDP_FADD	(0x7f << 0)	/* Function Address Value */
#define     AT91_UDP_FEN	(1    << 8)	/* Function Enable */

#define AT91_UDP_IER		0x10		/* Interrupt Enable Register */
#define AT91_UDP_IDR		0x14		/* Interrupt Disable Register */
#define AT91_UDP_IMR		0x18		/* Interrupt Mask Register */

#define AT91_UDP_ISR		0x1c		/* Interrupt Status Register */
#define     AT91_UDP_EP(n)	(1 << (n))	/* Endpoint Interrupt Status */
#define     AT91_UDP_RXSUSP	(1 <<  8) 	/* USB Suspend Interrupt Status */
#define     AT91_UDP_RXRSM	(1 <<  9)	/* USB Resume Interrupt Status */
#define     AT91_UDP_EXTRSM	(1 << 10)	/* External Resume Interrupt Status [AT91RM9200 only] */
#define     AT91_UDP_SOFINT	(1 << 11)	/* Start of Frame Interrupt Status */
#define     AT91_UDP_ENDBUSRES	(1 << 12)	/* End of Bus Reset Interrupt Status */
#define     AT91_UDP_WAKEUP	(1 << 13)	/* USB Wakeup Interrupt Status [AT91RM9200 only] */

#define AT91_UDP_ICR		0x20		/* Interrupt Clear Register */
#define AT91_UDP_RST_EP		0x28		/* Reset Endpoint Register */

#define AT91_UDP_CSR(n)		(0x30+((n)*4))	/* Endpoint Control/Status Registers 0-7 */
#define     AT91_UDP_TXCOMP	(1 <<  0)	/* Generates IN packet with data previously written in DPR */
#define     AT91_UDP_RX_DATA_BK0 (1 <<  1)	/* Receive Data Bank 0 */
#define     AT91_UDP_RXSETUP	(1 <<  2)	/* Send STALL to the host */
#define     AT91_UDP_STALLSENT	(1 <<  3)	/* Stall Sent / Isochronous error (Isochronous endpoints) */
#define     AT91_UDP_TXPKTRDY	(1 <<  4)	/* Transmit Packet Ready */
#define     AT91_UDP_FORCESTALL	(1 <<  5)	/* Force Stall */
#define     AT91_UDP_RX_DATA_BK1 (1 <<  6)	/* Receive Data Bank 1 */
#define     AT91_UDP_DIR	(1 <<  7)	/* Transfer Direction */
#define     AT91_UDP_EPTYPE	(7 <<  8)	/* Endpoint Type */
#define		AT91_UDP_EPTYPE_CTRL		(0 <<  8)
#define		AT91_UDP_EPTYPE_ISO_OUT		(1 <<  8)
#define		AT91_UDP_EPTYPE_BULK_OUT	(2 <<  8)
#define		AT91_UDP_EPTYPE_INT_OUT		(3 <<  8)
#define		AT91_UDP_EPTYPE_ISO_IN		(5 <<  8)
#define		AT91_UDP_EPTYPE_BULK_IN		(6 <<  8)
#define		AT91_UDP_EPTYPE_INT_IN		(7 <<  8)
#define     AT91_UDP_DTGLE	(1 << 11)	/* Data Toggle */
#define     AT91_UDP_EPEDS	(1 << 15)	/* Endpoint Enable/Disable */
#define     AT91_UDP_RXBYTECNT	(0x7ff << 16)	/* Number of bytes in FIFO */

#define AT91_UDP_FDR(n)		(0x50+((n)*4))	/* Endpoint FIFO Data Registers 0-7 */

#define AT91_UDP_TXVC		0x74		/* Transceiver Control Register */
#define     AT91_UDP_TXVC_TXVDIS (1 << 8)	/* Transceiver Disable */
#define     AT91_UDP_TXVC_PUON   (1 << 9)	/* PullUp On [AT91SAM9260 only] */

/*-------------------------------------------------------------------------*/

/*
 * controller driver data structures
 */

#define	NUM_ENDPOINTS	6

/*
 * hardware won't disable bus reset, or resume while the controller
 * is suspended ... watching suspend helps keep the logic symmetric.
 */
#define	MINIMUS_INTERRUPTUS \
	(AT91_UDP_ENDBUSRES | AT91_UDP_RXRSM | AT91_UDP_RXSUSP)

struct at91_ep {
	struct usb_ep			ep;
	struct list_head		queue;
	struct at91_udc			*udc;
	void __iomem			*creg;

	unsigned			maxpacket:16;
	u8				int_mask;
	unsigned			is_pingpong:1;

	unsigned			stopped:1;
	unsigned			is_in:1;
	unsigned			is_iso:1;
	unsigned			fifo_bank:1;
};

/*
 * driver is non-SMP, and just blocks IRQs whenever it needs
 * access protection for chip registers or driver state
 */
struct at91_udc {
	struct usb_gadget		gadget;
	struct at91_ep			ep[NUM_ENDPOINTS];
	struct usb_gadget_driver	*driver;
	unsigned			vbus:1;
	unsigned			enabled:1;
	unsigned			clocked:1;
	unsigned			suspended:1;
	unsigned			req_pending:1;
	unsigned			wait_for_addr_ack:1;
	unsigned			wait_for_config_ack:1;
	unsigned			selfpowered:1;
	unsigned			active_suspend:1;
	u8				addr;
	struct at91_udc_data		board;
	struct clk			*iclk, *fclk, *uclk;
	struct platform_device		*pdev;
	struct proc_dir_entry		*pde;
	void __iomem			*udp_baseaddr;
	int				udp_irq;
	spinlock_t			lock;
	struct timer_list		vbus_timer;
	struct work_struct		vbus_timer_work;
};

static inline struct at91_udc *to_udc(struct usb_gadget *g)
{
	return container_of(g, struct at91_udc, gadget);
}

struct at91_request {
	struct usb_request		req;
	struct list_head		queue;
};

/*-------------------------------------------------------------------------*/

#ifdef VERBOSE_DEBUG
#    define VDBG		DBG
#else
#    define VDBG(stuff...)	do{}while(0)
#endif

#ifdef PACKET_TRACE
#    define PACKET		VDBG
#else
#    define PACKET(stuff...)	do{}while(0)
#endif

#define ERR(stuff...)		pr_err("udc: " stuff)
#define WARNING(stuff...)	pr_warning("udc: " stuff)
#define INFO(stuff...)		pr_info("udc: " stuff)
#define DBG(stuff...)		pr_debug("udc: " stuff)

#endif