summaryrefslogtreecommitdiffstats
path: root/drivers/w1/dscore.h
blob: 6cf5671d6ebea601dbd6d83a172bed0cd4e738a8 (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
/*
 *	dscore.h
 *
 * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
 *
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef __DSCORE_H
#define __DSCORE_H

#include <linux/usb.h>
#include <asm/atomic.h>

/* COMMAND TYPE CODES */
#define CONTROL_CMD			0x00
#define COMM_CMD			0x01
#define MODE_CMD			0x02

/* CONTROL COMMAND CODES */
#define CTL_RESET_DEVICE		0x0000
#define CTL_START_EXE			0x0001
#define CTL_RESUME_EXE			0x0002
#define CTL_HALT_EXE_IDLE		0x0003
#define CTL_HALT_EXE_DONE		0x0004
#define CTL_FLUSH_COMM_CMDS		0x0007
#define CTL_FLUSH_RCV_BUFFER		0x0008
#define CTL_FLUSH_XMT_BUFFER		0x0009
#define CTL_GET_COMM_CMDS		0x000A

/* MODE COMMAND CODES */
#define MOD_PULSE_EN			0x0000
#define MOD_SPEED_CHANGE_EN		0x0001
#define MOD_1WIRE_SPEED			0x0002
#define MOD_STRONG_PU_DURATION		0x0003
#define MOD_PULLDOWN_SLEWRATE		0x0004
#define MOD_PROG_PULSE_DURATION		0x0005
#define MOD_WRITE1_LOWTIME		0x0006
#define MOD_DSOW0_TREC			0x0007

/* COMMUNICATION COMMAND CODES */
#define COMM_ERROR_ESCAPE		0x0601
#define COMM_SET_DURATION		0x0012
#define COMM_BIT_IO			0x0020
#define COMM_PULSE			0x0030
#define COMM_1_WIRE_RESET		0x0042
#define COMM_BYTE_IO			0x0052
#define COMM_MATCH_ACCESS		0x0064
#define COMM_BLOCK_IO			0x0074
#define COMM_READ_STRAIGHT		0x0080
#define COMM_DO_RELEASE			0x6092
#define COMM_SET_PATH			0x00A2
#define COMM_WRITE_SRAM_PAGE		0x00B2
#define COMM_WRITE_EPROM		0x00C4
#define COMM_READ_CRC_PROT_PAGE		0x00D4
#define COMM_READ_REDIRECT_PAGE_CRC	0x21E4
#define COMM_SEARCH_ACCESS		0x00F4

/* Communication command bits */
#define COMM_TYPE			0x0008
#define COMM_SE				0x0008
#define COMM_D				0x0008
#define COMM_Z				0x0008
#define COMM_CH				0x0008
#define COMM_SM				0x0008
#define COMM_R				0x0008
#define COMM_IM				0x0001

#define COMM_PS				0x4000
#define COMM_PST			0x4000
#define COMM_CIB			0x4000
#define COMM_RTS			0x4000
#define COMM_DT				0x2000
#define COMM_SPU			0x1000
#define COMM_F				0x0800
#define COMM_NTP			0x0400
#define COMM_ICP			0x0200
#define COMM_RST			0x0100

#define PULSE_PROG			0x01
#define PULSE_SPUE			0x02

#define BRANCH_MAIN			0xCC
#define BRANCH_AUX			0x33

/*
 * Duration of the strong pull-up pulse in milliseconds.
 */
#define PULLUP_PULSE_DURATION		750

/* Status flags */
#define ST_SPUA				0x01  /* Strong Pull-up is active */
#define ST_PRGA				0x02  /* 12V programming pulse is being generated */
#define ST_12VP				0x04  /* external 12V programming voltage is present */
#define ST_PMOD				0x08  /* DS2490 powered from USB and external sources */
#define ST_HALT				0x10  /* DS2490 is currently halted */
#define ST_IDLE				0x20  /* DS2490 is currently idle */
#define ST_EPOF				0x80

#define SPEED_NORMAL			0x00
#define SPEED_FLEXIBLE			0x01
#define SPEED_OVERDRIVE			0x02

#define NUM_EP				4
#define EP_CONTROL			0
#define EP_STATUS			1
#define EP_DATA_OUT			2
#define EP_DATA_IN			3

struct ds_device
{
	struct usb_device	*udev;
	struct usb_interface	*intf;

	int			ep[NUM_EP];

	atomic_t		refcnt;
};

struct ds_status
{
	u8			enable;
	u8			speed;
	u8			pullup_dur;
	u8			ppuls_dur;
	u8			pulldown_slew;
	u8			write1_time;
	u8			write0_time;
	u8			reserved0;
	u8			status;
	u8			command0;
	u8			command1;
	u8			command_buffer_status;
	u8			data_out_buffer_status;
	u8			data_in_buffer_status;
	u8			reserved1;
	u8			reserved2;

};

int ds_touch_bit(struct ds_device *, u8, u8 *);
int ds_read_byte(struct ds_device *, u8 *);
int ds_read_bit(struct ds_device *, u8 *);
int ds_write_byte(struct ds_device *, u8);
int ds_write_bit(struct ds_device *, u8);
int ds_reset(struct ds_device *, struct ds_status *);
struct ds_device * ds_get_device(void);
void ds_put_device(struct ds_device *);
int ds_write_block(struct ds_device *, u8 *, int);
int ds_read_block(struct ds_device *, u8 *, int);

#endif /* __DSCORE_H */

OpenPOWER on IntegriCloud