Commit | Line | Data |
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3e978a82 MA |
1 | /* |
2 | TDA665x tuner driver | |
3 | Copyright (C) Manu Abraham (abraham.manu@gmail.com) | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | #include <linux/init.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
3e978a82 MA |
24 | |
25 | #include "dvb_frontend.h" | |
26 | #include "tda665x.h" | |
27 | ||
28 | struct tda665x_state { | |
29 | struct dvb_frontend *fe; | |
30 | struct i2c_adapter *i2c; | |
31 | const struct tda665x_config *config; | |
32 | ||
33 | u32 frequency; | |
34 | u32 bandwidth; | |
35 | }; | |
36 | ||
37 | static int tda665x_read(struct tda665x_state *state, u8 *buf) | |
38 | { | |
39 | const struct tda665x_config *config = state->config; | |
40 | int err = 0; | |
41 | struct i2c_msg msg = { .addr = config->addr, .flags = I2C_M_RD, .buf = buf, .len = 2 }; | |
42 | ||
43 | err = i2c_transfer(state->i2c, &msg, 1); | |
44 | if (err != 1) | |
45 | goto exit; | |
46 | ||
47 | return err; | |
48 | exit: | |
f5ae4f6f | 49 | printk(KERN_ERR "%s: I/O Error err=<%d>\n", __func__, err); |
3e978a82 MA |
50 | return err; |
51 | } | |
52 | ||
53 | static int tda665x_write(struct tda665x_state *state, u8 *buf, u8 length) | |
54 | { | |
55 | const struct tda665x_config *config = state->config; | |
56 | int err = 0; | |
57 | struct i2c_msg msg = { .addr = config->addr, .flags = 0, .buf = buf, .len = length }; | |
58 | ||
59 | err = i2c_transfer(state->i2c, &msg, 1); | |
60 | if (err != 1) | |
61 | goto exit; | |
62 | ||
63 | return err; | |
64 | exit: | |
f5ae4f6f | 65 | printk(KERN_ERR "%s: I/O Error err=<%d>\n", __func__, err); |
3e978a82 MA |
66 | return err; |
67 | } | |
68 | ||
8fdc25bf MCC |
69 | static int tda665x_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
70 | { | |
71 | struct tda665x_state *state = fe->tuner_priv; | |
72 | ||
73 | *frequency = state->frequency; | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
3e978a82 MA |
78 | static int tda665x_get_status(struct dvb_frontend *fe, u32 *status) |
79 | { | |
80 | struct tda665x_state *state = fe->tuner_priv; | |
81 | u8 result = 0; | |
82 | int err = 0; | |
83 | ||
84 | *status = 0; | |
85 | ||
86 | err = tda665x_read(state, &result); | |
87 | if (err < 0) | |
88 | goto exit; | |
89 | ||
90 | if ((result >> 6) & 0x01) { | |
f5ae4f6f | 91 | printk(KERN_DEBUG "%s: Tuner Phase Locked\n", __func__); |
3e978a82 MA |
92 | *status = 1; |
93 | } | |
94 | ||
95 | return err; | |
96 | exit: | |
f5ae4f6f | 97 | printk(KERN_ERR "%s: I/O Error\n", __func__); |
3e978a82 MA |
98 | return err; |
99 | } | |
100 | ||
8e6c4be3 MCC |
101 | static int tda665x_set_frequency(struct dvb_frontend *fe, |
102 | u32 new_frequency) | |
3e978a82 MA |
103 | { |
104 | struct tda665x_state *state = fe->tuner_priv; | |
105 | const struct tda665x_config *config = state->config; | |
106 | u32 frequency, status = 0; | |
107 | u8 buf[4]; | |
108 | int err = 0; | |
109 | ||
8e6c4be3 MCC |
110 | if ((new_frequency < config->frequency_max) |
111 | || (new_frequency > config->frequency_min)) { | |
112 | printk(KERN_ERR "%s: Frequency beyond limits, frequency=%d\n", | |
113 | __func__, new_frequency); | |
3e978a82 MA |
114 | return -EINVAL; |
115 | } | |
116 | ||
8e6c4be3 MCC |
117 | frequency = new_frequency; |
118 | ||
119 | frequency += config->frequency_offst; | |
120 | frequency *= config->ref_multiplier; | |
121 | frequency += config->ref_divider >> 1; | |
122 | frequency /= config->ref_divider; | |
123 | ||
124 | buf[0] = (u8) ((frequency & 0x7f00) >> 8); | |
125 | buf[1] = (u8) (frequency & 0x00ff) >> 0; | |
126 | buf[2] = 0x80 | 0x40 | 0x02; | |
127 | buf[3] = 0x00; | |
128 | ||
129 | /* restore frequency */ | |
130 | frequency = new_frequency; | |
131 | ||
132 | if (frequency < 153000000) { | |
133 | /* VHF-L */ | |
134 | buf[3] |= 0x01; /* fc, Low Band, 47 - 153 MHz */ | |
135 | if (frequency < 68000000) | |
136 | buf[3] |= 0x40; /* 83uA */ | |
137 | if (frequency < 1040000000) | |
138 | buf[3] |= 0x60; /* 122uA */ | |
139 | if (frequency < 1250000000) | |
140 | buf[3] |= 0x80; /* 163uA */ | |
141 | else | |
142 | buf[3] |= 0xa0; /* 254uA */ | |
143 | } else if (frequency < 438000000) { | |
144 | /* VHF-H */ | |
145 | buf[3] |= 0x02; /* fc, Mid Band, 153 - 438 MHz */ | |
146 | if (frequency < 230000000) | |
147 | buf[3] |= 0x40; | |
148 | if (frequency < 300000000) | |
149 | buf[3] |= 0x60; | |
150 | else | |
151 | buf[3] |= 0x80; | |
152 | } else { | |
153 | /* UHF */ | |
154 | buf[3] |= 0x04; /* fc, High Band, 438 - 862 MHz */ | |
155 | if (frequency < 470000000) | |
156 | buf[3] |= 0x60; | |
157 | if (frequency < 526000000) | |
158 | buf[3] |= 0x80; | |
159 | else | |
160 | buf[3] |= 0xa0; | |
161 | } | |
162 | ||
163 | /* Set params */ | |
164 | err = tda665x_write(state, buf, 5); | |
165 | if (err < 0) | |
166 | goto exit; | |
167 | ||
168 | /* sleep for some time */ | |
169 | printk(KERN_DEBUG "%s: Waiting to Phase LOCK\n", __func__); | |
170 | msleep(20); | |
171 | /* check status */ | |
172 | err = tda665x_get_status(fe, &status); | |
173 | if (err < 0) | |
174 | goto exit; | |
175 | ||
176 | if (status == 1) { | |
177 | printk(KERN_DEBUG "%s: Tuner Phase locked: status=%d\n", | |
178 | __func__, status); | |
179 | state->frequency = frequency; /* cache successful state */ | |
180 | } else { | |
181 | printk(KERN_ERR "%s: No Phase lock: status=%d\n", | |
182 | __func__, status); | |
183 | } | |
184 | ||
3e978a82 MA |
185 | return 0; |
186 | exit: | |
f5ae4f6f | 187 | printk(KERN_ERR "%s: I/O Error\n", __func__); |
3e978a82 MA |
188 | return err; |
189 | } | |
190 | ||
8fdc25bf MCC |
191 | static int tda665x_set_params(struct dvb_frontend *fe) |
192 | { | |
193 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
194 | ||
195 | tda665x_set_frequency(fe, c->frequency); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
3e978a82 MA |
200 | static int tda665x_release(struct dvb_frontend *fe) |
201 | { | |
202 | struct tda665x_state *state = fe->tuner_priv; | |
203 | ||
204 | fe->tuner_priv = NULL; | |
205 | kfree(state); | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static struct dvb_tuner_ops tda665x_ops = { | |
3e978a82 | 210 | .get_status = tda665x_get_status, |
8fdc25bf MCC |
211 | .set_params = tda665x_set_params, |
212 | .get_frequency = tda665x_get_frequency, | |
3e978a82 MA |
213 | .release = tda665x_release |
214 | }; | |
215 | ||
216 | struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe, | |
217 | const struct tda665x_config *config, | |
218 | struct i2c_adapter *i2c) | |
219 | { | |
220 | struct tda665x_state *state = NULL; | |
221 | struct dvb_tuner_info *info; | |
222 | ||
f5ae4f6f | 223 | state = kzalloc(sizeof(struct tda665x_state), GFP_KERNEL); |
0df10427 PST |
224 | if (!state) |
225 | return NULL; | |
3e978a82 MA |
226 | |
227 | state->config = config; | |
228 | state->i2c = i2c; | |
229 | state->fe = fe; | |
230 | fe->tuner_priv = state; | |
231 | fe->ops.tuner_ops = tda665x_ops; | |
232 | info = &fe->ops.tuner_ops.info; | |
233 | ||
f5ae4f6f | 234 | memcpy(info->name, config->name, sizeof(config->name)); |
3e978a82 MA |
235 | info->frequency_min = config->frequency_min; |
236 | info->frequency_max = config->frequency_max; | |
237 | info->frequency_step = config->frequency_offst; | |
238 | ||
f5ae4f6f | 239 | printk(KERN_DEBUG "%s: Attaching TDA665x (%s) tuner\n", __func__, info->name); |
3e978a82 MA |
240 | |
241 | return fe; | |
3e978a82 MA |
242 | } |
243 | EXPORT_SYMBOL(tda665x_attach); | |
244 | ||
245 | MODULE_DESCRIPTION("TDA665x driver"); | |
246 | MODULE_AUTHOR("Manu Abraham"); | |
247 | MODULE_LICENSE("GPL"); |