summaryrefslogtreecommitdiff
path: root/drivers/media/dvb-frontends/stb6000.c
blob: 8c9800d577e03548d3e1b5223c4d4f435ac28798 (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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
// SPDX-License-Identifier: GPL-2.0-or-later
  /*
     Driver for ST STB6000 DVBS Silicon tuner

     Copyright (C) 2008 Igor M. Liplianin (liplianin@me.by)


  */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <asm/types.h>

#include "stb6000.h"

static int debug;
#define dprintk(args...) \
	do { \
		if (debug) \
			printk(KERN_DEBUG "stb6000: " args); \
	} while (0)

struct stb6000_priv {
	/* i2c details */
	int i2c_address;
	struct i2c_adapter *i2c;
	u32 frequency;
};

static void stb6000_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
}

static int stb6000_sleep(struct dvb_frontend *fe)
{
	struct stb6000_priv *priv = fe->tuner_priv;
	int ret;
	u8 buf[] = { 10, 0 };
	struct i2c_msg msg = {
		.addr = priv->i2c_address,
		.flags = 0,
		.buf = buf,
		.len = 2
	};

	dprintk("%s:\n", __func__);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	ret = i2c_transfer(priv->i2c, &msg, 1);
	if (ret != 1)
		dprintk("%s: i2c error\n", __func__);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

	return (ret == 1) ? 0 : ret;
}

static int stb6000_set_params(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct stb6000_priv *priv = fe->tuner_priv;
	unsigned int n, m;
	int ret;
	u32 freq_mhz;
	int bandwidth;
	u8 buf[12];
	struct i2c_msg msg = {
		.addr = priv->i2c_address,
		.flags = 0,
		.buf = buf,
		.len = 12
	};

	dprintk("%s:\n", __func__);

	freq_mhz = p->frequency / 1000;
	bandwidth = p->symbol_rate / 1000000;

	if (bandwidth > 31)
		bandwidth = 31;

	if ((freq_mhz > 949) && (freq_mhz < 2151)) {
		buf[0] = 0x01;
		buf[1] = 0xac;
		if (freq_mhz < 1950)
			buf[1] = 0xaa;
		if (freq_mhz < 1800)
			buf[1] = 0xa8;
		if (freq_mhz < 1650)
			buf[1] = 0xa6;
		if (freq_mhz < 1530)
			buf[1] = 0xa5;
		if (freq_mhz < 1470)
			buf[1] = 0xa4;
		if (freq_mhz < 1370)
			buf[1] = 0xa2;
		if (freq_mhz < 1300)
			buf[1] = 0xa1;
		if (freq_mhz < 1200)
			buf[1] = 0xa0;
		if (freq_mhz < 1075)
			buf[1] = 0xbc;
		if (freq_mhz < 1000)
			buf[1] = 0xba;
		if (freq_mhz < 1075) {
			n = freq_mhz / 8; /* vco=lo*4 */
			m = 2;
		} else {
			n = freq_mhz / 16; /* vco=lo*2 */
			m = 1;
		}
		buf[2] = n >> 1;
		buf[3] = (unsigned char)(((n & 1) << 7) |
					(m * freq_mhz - n * 16) | 0x60);
		buf[4] = 0x04;
		buf[5] = 0x0e;

		buf[6] = (unsigned char)(bandwidth);

		buf[7] = 0xd8;
		buf[8] = 0xd0;
		buf[9] = 0x50;
		buf[10] = 0xeb;
		buf[11] = 0x4f;

		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);

		ret = i2c_transfer(priv->i2c, &msg, 1);
		if (ret != 1)
			dprintk("%s: i2c error\n", __func__);

		udelay(10);
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);

		buf[0] = 0x07;
		buf[1] = 0xdf;
		buf[2] = 0xd0;
		buf[3] = 0x50;
		buf[4] = 0xfb;
		msg.len = 5;

		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);

		ret = i2c_transfer(priv->i2c, &msg, 1);
		if (ret != 1)
			dprintk("%s: i2c error\n", __func__);

		udelay(10);
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);

		priv->frequency = freq_mhz * 1000;

		return (ret == 1) ? 0 : ret;
	}
	return -1;
}

static int stb6000_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct stb6000_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;
	return 0;
}

static const struct dvb_tuner_ops stb6000_tuner_ops = {
	.info = {
		.name = "ST STB6000",
		.frequency_min_hz =  950 * MHz,
		.frequency_max_hz = 2150 * MHz
	},
	.release = stb6000_release,
	.sleep = stb6000_sleep,
	.set_params = stb6000_set_params,
	.get_frequency = stb6000_get_frequency,
};

struct dvb_frontend *stb6000_attach(struct dvb_frontend *fe, int addr,
						struct i2c_adapter *i2c)
{
	struct stb6000_priv *priv = NULL;
	u8 b0[] = { 0 };
	u8 b1[] = { 0, 0 };
	struct i2c_msg msg[2] = {
		{
			.addr = addr,
			.flags = 0,
			.buf = b0,
			.len = 0
		}, {
			.addr = addr,
			.flags = I2C_M_RD,
			.buf = b1,
			.len = 2
		}
	};
	int ret;

	dprintk("%s:\n", __func__);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	/* is some i2c device here ? */
	ret = i2c_transfer(i2c, msg, 2);
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

	if (ret != 2)
		return NULL;

	priv = kzalloc(sizeof(struct stb6000_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	priv->i2c_address = addr;
	priv->i2c = i2c;

	memcpy(&fe->ops.tuner_ops, &stb6000_tuner_ops,
				sizeof(struct dvb_tuner_ops));

	fe->tuner_priv = priv;

	return fe;
}
EXPORT_SYMBOL(stb6000_attach);

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

MODULE_DESCRIPTION("DVB STB6000 driver");
MODULE_AUTHOR("Igor M. Liplianin <liplianin@me.by>");
MODULE_LICENSE("GPL");