summaryrefslogtreecommitdiff
path: root/drivers/media/video/hdpvr/hdpvr-i2c.c
blob: 45b88cf60d68457ca0cfd8f304a2df8c52a83e96 (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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192

/*
 * Hauppauge HD PVR USB driver
 *
 * Copyright (C) 2008      Janne Grunau (j@jannau.net)
 *
 * IR device registration code is
 * Copyright (C) 2010	Andy Walls <awalls@md.metrocast.net>
 *
 *	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, version 2.
 *
 */

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)

#include <linux/i2c.h>
#include <linux/slab.h>

#include "hdpvr.h"

#define CTRL_READ_REQUEST	0xb8
#define CTRL_WRITE_REQUEST	0x38

#define REQTYPE_I2C_READ	0xb1
#define REQTYPE_I2C_WRITE	0xb0
#define REQTYPE_I2C_WRITE_STATT	0xd0

#define Z8F0811_IR_TX_I2C_ADDR	0x70
#define Z8F0811_IR_RX_I2C_ADDR	0x71


static struct i2c_board_info hdpvr_i2c_board_info = {
	I2C_BOARD_INFO("ir_tx_z8f0811_hdpvr", Z8F0811_IR_TX_I2C_ADDR),
	I2C_BOARD_INFO("ir_rx_z8f0811_hdpvr", Z8F0811_IR_RX_I2C_ADDR),
};

int hdpvr_register_i2c_ir(struct hdpvr_device *dev)
{
	struct i2c_client *c;
	struct IR_i2c_init_data *init_data = &dev->ir_i2c_init_data;

	/* Our default information for ir-kbd-i2c.c to use */
	init_data->ir_codes = RC_MAP_HAUPPAUGE_NEW;
	init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
	init_data->type = RC_TYPE_RC5;
	init_data->name = "HD PVR";
	hdpvr_i2c_board_info.platform_data = init_data;

	c = i2c_new_device(&dev->i2c_adapter, &hdpvr_i2c_board_info);

	return (c == NULL) ? -ENODEV : 0;
}

static int hdpvr_i2c_read(struct hdpvr_device *dev, int bus,
			  unsigned char addr, char *data, int len)
{
	int ret;
	char *buf = kmalloc(len, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	ret = usb_control_msg(dev->udev,
			      usb_rcvctrlpipe(dev->udev, 0),
			      REQTYPE_I2C_READ, CTRL_READ_REQUEST,
			      (bus << 8) | addr, 0, buf, len, 1000);

	if (ret == len) {
		memcpy(data, buf, len);
		ret = 0;
	} else if (ret >= 0)
		ret = -EIO;

	kfree(buf);

	return ret;
}

static int hdpvr_i2c_write(struct hdpvr_device *dev, int bus,
			   unsigned char addr, char *data, int len)
{
	int ret;
	char *buf = kmalloc(len, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	memcpy(buf, data, len);
	ret = usb_control_msg(dev->udev,
			      usb_sndctrlpipe(dev->udev, 0),
			      REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST,
			      (bus << 8) | addr, 0, buf, len, 1000);

	if (ret < 0)
		goto error;

	ret = usb_control_msg(dev->udev,
			      usb_rcvctrlpipe(dev->udev, 0),
			      REQTYPE_I2C_WRITE_STATT, CTRL_READ_REQUEST,
			      0, 0, buf, 2, 1000);

	if ((ret == 2) && (buf[1] == (len - 1)))
		ret = 0;
	else if (ret >= 0)
		ret = -EIO;

error:
	kfree(buf);
	return ret;
}

static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs,
			  int num)
{
	struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter);
	int retval = 0, i, addr;

	if (num <= 0)
		return 0;

	mutex_lock(&dev->i2c_mutex);

	for (i = 0; i < num && !retval; i++) {
		addr = msgs[i].addr << 1;

		if (msgs[i].flags & I2C_M_RD)
			retval = hdpvr_i2c_read(dev, 1, addr, msgs[i].buf,
						msgs[i].len);
		else
			retval = hdpvr_i2c_write(dev, 1, addr, msgs[i].buf,
						 msgs[i].len);
	}

	mutex_unlock(&dev->i2c_mutex);

	return retval ? retval : num;
}

static u32 hdpvr_functionality(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}

static struct i2c_algorithm hdpvr_algo = {
	.master_xfer   = hdpvr_transfer,
	.functionality = hdpvr_functionality,
};

static struct i2c_adapter hdpvr_i2c_adapter_template = {
	.name   = "Hauppage HD PVR I2C",
	.owner  = THIS_MODULE,
	.algo   = &hdpvr_algo,
};

static int hdpvr_activate_ir(struct hdpvr_device *dev)
{
	char buffer[8];

	mutex_lock(&dev->i2c_mutex);

	hdpvr_i2c_read(dev, 0, 0x54, buffer, 1);

	buffer[0] = 0;
	buffer[1] = 0x8;
	hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);

	buffer[1] = 0x18;
	hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);

	mutex_unlock(&dev->i2c_mutex);

	return 0;
}

int hdpvr_register_i2c_adapter(struct hdpvr_device *dev)
{
	int retval = -ENOMEM;

	hdpvr_activate_ir(dev);

	memcpy(&dev->i2c_adapter, &hdpvr_i2c_adapter_template,
	       sizeof(struct i2c_adapter));
	dev->i2c_adapter.dev.parent = &dev->udev->dev;

	i2c_set_adapdata(&dev->i2c_adapter, dev);

	retval = i2c_add_adapter(&dev->i2c_adapter);

	return retval;
}

#endif