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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 | ||
69 | static int tda665x_get_state(struct dvb_frontend *fe, | |
70 | enum tuner_param param, | |
71 | struct tuner_state *tstate) | |
72 | { | |
73 | struct tda665x_state *state = fe->tuner_priv; | |
74 | int err = 0; | |
75 | ||
76 | switch (param) { | |
77 | case DVBFE_TUNER_FREQUENCY: | |
78 | tstate->frequency = state->frequency; | |
79 | break; | |
80 | case DVBFE_TUNER_BANDWIDTH: | |
81 | break; | |
82 | default: | |
f5ae4f6f | 83 | printk(KERN_ERR "%s: Unknown parameter (param=%d)\n", __func__, param); |
3e978a82 MA |
84 | err = -EINVAL; |
85 | break; | |
86 | } | |
87 | ||
88 | return err; | |
89 | } | |
90 | ||
91 | static int tda665x_get_status(struct dvb_frontend *fe, u32 *status) | |
92 | { | |
93 | struct tda665x_state *state = fe->tuner_priv; | |
94 | u8 result = 0; | |
95 | int err = 0; | |
96 | ||
97 | *status = 0; | |
98 | ||
99 | err = tda665x_read(state, &result); | |
100 | if (err < 0) | |
101 | goto exit; | |
102 | ||
103 | if ((result >> 6) & 0x01) { | |
f5ae4f6f | 104 | printk(KERN_DEBUG "%s: Tuner Phase Locked\n", __func__); |
3e978a82 MA |
105 | *status = 1; |
106 | } | |
107 | ||
108 | return err; | |
109 | exit: | |
f5ae4f6f | 110 | printk(KERN_ERR "%s: I/O Error\n", __func__); |
3e978a82 MA |
111 | return err; |
112 | } | |
113 | ||
114 | static int tda665x_set_state(struct dvb_frontend *fe, | |
115 | enum tuner_param param, | |
116 | struct tuner_state *tstate) | |
117 | { | |
118 | struct tda665x_state *state = fe->tuner_priv; | |
119 | const struct tda665x_config *config = state->config; | |
120 | u32 frequency, status = 0; | |
121 | u8 buf[4]; | |
122 | int err = 0; | |
123 | ||
124 | if (param & DVBFE_TUNER_FREQUENCY) { | |
125 | ||
126 | frequency = tstate->frequency; | |
127 | if ((frequency < config->frequency_max) || (frequency > config->frequency_min)) { | |
f5ae4f6f | 128 | printk(KERN_ERR "%s: Frequency beyond limits, frequency=%d\n", __func__, frequency); |
3e978a82 MA |
129 | return -EINVAL; |
130 | } | |
131 | ||
132 | frequency += config->frequency_offst; | |
133 | frequency *= config->ref_multiplier; | |
134 | frequency += config->ref_divider >> 1; | |
135 | frequency /= config->ref_divider; | |
136 | ||
7ccf1eea | 137 | buf[0] = (u8) ((frequency & 0x7f00) >> 8); |
f5ae4f6f | 138 | buf[1] = (u8) (frequency & 0x00ff) >> 0; |
3e978a82 MA |
139 | buf[2] = 0x80 | 0x40 | 0x02; |
140 | buf[3] = 0x00; | |
141 | ||
142 | /* restore frequency */ | |
143 | frequency = tstate->frequency; | |
144 | ||
145 | if (frequency < 153000000) { | |
146 | /* VHF-L */ | |
147 | buf[3] |= 0x01; /* fc, Low Band, 47 - 153 MHz */ | |
148 | if (frequency < 68000000) | |
149 | buf[3] |= 0x40; /* 83uA */ | |
150 | if (frequency < 1040000000) | |
151 | buf[3] |= 0x60; /* 122uA */ | |
152 | if (frequency < 1250000000) | |
153 | buf[3] |= 0x80; /* 163uA */ | |
154 | else | |
155 | buf[3] |= 0xa0; /* 254uA */ | |
156 | } else if (frequency < 438000000) { | |
157 | /* VHF-H */ | |
158 | buf[3] |= 0x02; /* fc, Mid Band, 153 - 438 MHz */ | |
159 | if (frequency < 230000000) | |
160 | buf[3] |= 0x40; | |
161 | if (frequency < 300000000) | |
162 | buf[3] |= 0x60; | |
163 | else | |
164 | buf[3] |= 0x80; | |
165 | } else { | |
166 | /* UHF */ | |
167 | buf[3] |= 0x04; /* fc, High Band, 438 - 862 MHz */ | |
168 | if (frequency < 470000000) | |
169 | buf[3] |= 0x60; | |
170 | if (frequency < 526000000) | |
171 | buf[3] |= 0x80; | |
172 | else | |
173 | buf[3] |= 0xa0; | |
174 | } | |
175 | ||
176 | /* Set params */ | |
177 | err = tda665x_write(state, buf, 5); | |
178 | if (err < 0) | |
179 | goto exit; | |
180 | ||
181 | /* sleep for some time */ | |
f5ae4f6f | 182 | printk(KERN_DEBUG "%s: Waiting to Phase LOCK\n", __func__); |
3e978a82 MA |
183 | msleep(20); |
184 | /* check status */ | |
185 | err = tda665x_get_status(fe, &status); | |
186 | if (err < 0) | |
187 | goto exit; | |
188 | ||
189 | if (status == 1) { | |
f5ae4f6f | 190 | printk(KERN_DEBUG "%s: Tuner Phase locked: status=%d\n", __func__, status); |
3e978a82 MA |
191 | state->frequency = frequency; /* cache successful state */ |
192 | } else { | |
f5ae4f6f | 193 | printk(KERN_ERR "%s: No Phase lock: status=%d\n", __func__, status); |
3e978a82 MA |
194 | } |
195 | } else { | |
f5ae4f6f | 196 | printk(KERN_ERR "%s: Unknown parameter (param=%d)\n", __func__, param); |
3e978a82 MA |
197 | return -EINVAL; |
198 | } | |
199 | ||
200 | return 0; | |
201 | exit: | |
f5ae4f6f | 202 | printk(KERN_ERR "%s: I/O Error\n", __func__); |
3e978a82 MA |
203 | return err; |
204 | } | |
205 | ||
206 | static int tda665x_release(struct dvb_frontend *fe) | |
207 | { | |
208 | struct tda665x_state *state = fe->tuner_priv; | |
209 | ||
210 | fe->tuner_priv = NULL; | |
211 | kfree(state); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static struct dvb_tuner_ops tda665x_ops = { | |
216 | ||
217 | .set_state = tda665x_set_state, | |
218 | .get_state = tda665x_get_state, | |
219 | .get_status = tda665x_get_status, | |
220 | .release = tda665x_release | |
221 | }; | |
222 | ||
223 | struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe, | |
224 | const struct tda665x_config *config, | |
225 | struct i2c_adapter *i2c) | |
226 | { | |
227 | struct tda665x_state *state = NULL; | |
228 | struct dvb_tuner_info *info; | |
229 | ||
f5ae4f6f | 230 | state = kzalloc(sizeof(struct tda665x_state), GFP_KERNEL); |
0df10427 PST |
231 | if (!state) |
232 | return NULL; | |
3e978a82 MA |
233 | |
234 | state->config = config; | |
235 | state->i2c = i2c; | |
236 | state->fe = fe; | |
237 | fe->tuner_priv = state; | |
238 | fe->ops.tuner_ops = tda665x_ops; | |
239 | info = &fe->ops.tuner_ops.info; | |
240 | ||
f5ae4f6f | 241 | memcpy(info->name, config->name, sizeof(config->name)); |
3e978a82 MA |
242 | info->frequency_min = config->frequency_min; |
243 | info->frequency_max = config->frequency_max; | |
244 | info->frequency_step = config->frequency_offst; | |
245 | ||
f5ae4f6f | 246 | printk(KERN_DEBUG "%s: Attaching TDA665x (%s) tuner\n", __func__, info->name); |
3e978a82 MA |
247 | |
248 | return fe; | |
3e978a82 MA |
249 | } |
250 | EXPORT_SYMBOL(tda665x_attach); | |
251 | ||
252 | MODULE_DESCRIPTION("TDA665x driver"); | |
253 | MODULE_AUTHOR("Manu Abraham"); | |
254 | MODULE_LICENSE("GPL"); |