Commit | Line | Data |
---|---|---|
51ff2e2c AP |
1 | /* |
2 | * NXP TDA18218HN silicon tuner driver | |
3 | * | |
4 | * Copyright (C) 2010 Antti Palosaari <crope@iki.fi> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
51ff2e2c AP |
21 | #include "tda18218_priv.h" |
22 | ||
f1baab87 MCC |
23 | /* Max transfer size done by I2C transfer functions */ |
24 | #define MAX_XFER_SIZE 64 | |
25 | ||
51ff2e2c AP |
26 | /* write multiple registers */ |
27 | static int tda18218_wr_regs(struct tda18218_priv *priv, u8 reg, u8 *val, u8 len) | |
28 | { | |
af3a07ac | 29 | int ret = 0, len2, remaining; |
f1baab87 | 30 | u8 buf[MAX_XFER_SIZE]; |
51ff2e2c AP |
31 | struct i2c_msg msg[1] = { |
32 | { | |
33 | .addr = priv->cfg->i2c_address, | |
34 | .flags = 0, | |
35 | .buf = buf, | |
36 | } | |
37 | }; | |
38 | ||
f1baab87 MCC |
39 | if (1 + len > sizeof(buf)) { |
40 | dev_warn(&priv->i2c->dev, | |
41 | "%s: i2c wr reg=%04x: len=%d is too big!\n", | |
42 | KBUILD_MODNAME, reg, len); | |
43 | return -EINVAL; | |
44 | } | |
45 | ||
af3a07ac AP |
46 | for (remaining = len; remaining > 0; |
47 | remaining -= (priv->cfg->i2c_wr_max - 1)) { | |
48 | len2 = remaining; | |
49 | if (len2 > (priv->cfg->i2c_wr_max - 1)) | |
50 | len2 = (priv->cfg->i2c_wr_max - 1); | |
51ff2e2c | 51 | |
af3a07ac AP |
52 | msg[0].len = 1 + len2; |
53 | buf[0] = reg + len - remaining; | |
54 | memcpy(&buf[1], &val[len - remaining], len2); | |
51ff2e2c AP |
55 | |
56 | ret = i2c_transfer(priv->i2c, msg, 1); | |
57 | if (ret != 1) | |
58 | break; | |
59 | } | |
60 | ||
61 | if (ret == 1) { | |
62 | ret = 0; | |
63 | } else { | |
9edd6987 AP |
64 | dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \ |
65 | "len=%d\n", KBUILD_MODNAME, ret, reg, len); | |
51ff2e2c AP |
66 | ret = -EREMOTEIO; |
67 | } | |
68 | ||
69 | return ret; | |
70 | } | |
71 | ||
72 | /* read multiple registers */ | |
73 | static int tda18218_rd_regs(struct tda18218_priv *priv, u8 reg, u8 *val, u8 len) | |
74 | { | |
75 | int ret; | |
f1baab87 | 76 | u8 buf[MAX_XFER_SIZE]; /* we must start read always from reg 0x00 */ |
51ff2e2c AP |
77 | struct i2c_msg msg[2] = { |
78 | { | |
79 | .addr = priv->cfg->i2c_address, | |
80 | .flags = 0, | |
81 | .len = 1, | |
82 | .buf = "\x00", | |
83 | }, { | |
84 | .addr = priv->cfg->i2c_address, | |
85 | .flags = I2C_M_RD, | |
f1baab87 | 86 | .len = reg + len, |
51ff2e2c AP |
87 | .buf = buf, |
88 | } | |
89 | }; | |
90 | ||
f1baab87 MCC |
91 | if (reg + len > sizeof(buf)) { |
92 | dev_warn(&priv->i2c->dev, | |
93 | "%s: i2c wr reg=%04x: len=%d is too big!\n", | |
94 | KBUILD_MODNAME, reg, len); | |
95 | return -EINVAL; | |
96 | } | |
97 | ||
51ff2e2c AP |
98 | ret = i2c_transfer(priv->i2c, msg, 2); |
99 | if (ret == 2) { | |
100 | memcpy(val, &buf[reg], len); | |
101 | ret = 0; | |
102 | } else { | |
9edd6987 AP |
103 | dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \ |
104 | "len=%d\n", KBUILD_MODNAME, ret, reg, len); | |
51ff2e2c AP |
105 | ret = -EREMOTEIO; |
106 | } | |
107 | ||
108 | return ret; | |
109 | } | |
110 | ||
111 | /* write single register */ | |
112 | static int tda18218_wr_reg(struct tda18218_priv *priv, u8 reg, u8 val) | |
113 | { | |
114 | return tda18218_wr_regs(priv, reg, &val, 1); | |
115 | } | |
116 | ||
117 | /* read single register */ | |
118 | ||
119 | static int tda18218_rd_reg(struct tda18218_priv *priv, u8 reg, u8 *val) | |
120 | { | |
121 | return tda18218_rd_regs(priv, reg, val, 1); | |
122 | } | |
123 | ||
14d24d14 | 124 | static int tda18218_set_params(struct dvb_frontend *fe) |
51ff2e2c AP |
125 | { |
126 | struct tda18218_priv *priv = fe->tuner_priv; | |
67ccfe3b MCC |
127 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
128 | u32 bw = c->bandwidth_hz; | |
51ff2e2c AP |
129 | int ret; |
130 | u8 buf[3], i, BP_Filter, LP_Fc; | |
131 | u32 LO_Frac; | |
132 | /* TODO: find out correct AGC algorithm */ | |
133 | u8 agc[][2] = { | |
134 | { R20_AGC11, 0x60 }, | |
135 | { R23_AGC21, 0x02 }, | |
136 | { R20_AGC11, 0xa0 }, | |
137 | { R23_AGC21, 0x09 }, | |
138 | { R20_AGC11, 0xe0 }, | |
139 | { R23_AGC21, 0x0c }, | |
140 | { R20_AGC11, 0x40 }, | |
141 | { R23_AGC21, 0x01 }, | |
142 | { R20_AGC11, 0x80 }, | |
143 | { R23_AGC21, 0x08 }, | |
144 | { R20_AGC11, 0xc0 }, | |
145 | { R23_AGC21, 0x0b }, | |
146 | { R24_AGC22, 0x1c }, | |
147 | { R24_AGC22, 0x0c }, | |
148 | }; | |
149 | ||
150 | if (fe->ops.i2c_gate_ctrl) | |
151 | fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ | |
152 | ||
153 | /* low-pass filter cut-off frequency */ | |
67ccfe3b | 154 | if (bw <= 6000000) { |
51ff2e2c | 155 | LP_Fc = 0; |
b4d48c94 | 156 | priv->if_frequency = 3000000; |
67ccfe3b | 157 | } else if (bw <= 7000000) { |
51ff2e2c | 158 | LP_Fc = 1; |
522fdf73 | 159 | priv->if_frequency = 3500000; |
67ccfe3b | 160 | } else { |
51ff2e2c | 161 | LP_Fc = 2; |
522fdf73 | 162 | priv->if_frequency = 4000000; |
51ff2e2c AP |
163 | } |
164 | ||
67ccfe3b | 165 | LO_Frac = c->frequency + priv->if_frequency; |
522fdf73 | 166 | |
51ff2e2c AP |
167 | /* band-pass filter */ |
168 | if (LO_Frac < 188000000) | |
169 | BP_Filter = 3; | |
170 | else if (LO_Frac < 253000000) | |
171 | BP_Filter = 4; | |
172 | else if (LO_Frac < 343000000) | |
173 | BP_Filter = 5; | |
174 | else | |
175 | BP_Filter = 6; | |
176 | ||
177 | buf[0] = (priv->regs[R1A_IF1] & ~7) | BP_Filter; /* BP_Filter */ | |
178 | buf[1] = (priv->regs[R1B_IF2] & ~3) | LP_Fc; /* LP_Fc */ | |
179 | buf[2] = priv->regs[R1C_AGC2B]; | |
180 | ret = tda18218_wr_regs(priv, R1A_IF1, buf, 3); | |
181 | if (ret) | |
182 | goto error; | |
183 | ||
184 | buf[0] = (LO_Frac / 1000) >> 12; /* LO_Frac_0 */ | |
185 | buf[1] = (LO_Frac / 1000) >> 4; /* LO_Frac_1 */ | |
186 | buf[2] = (LO_Frac / 1000) << 4 | | |
187 | (priv->regs[R0C_MD5] & 0x0f); /* LO_Frac_2 */ | |
188 | ret = tda18218_wr_regs(priv, R0A_MD3, buf, 3); | |
189 | if (ret) | |
190 | goto error; | |
191 | ||
192 | buf[0] = priv->regs[R0F_MD8] | (1 << 6); /* Freq_prog_Start */ | |
193 | ret = tda18218_wr_regs(priv, R0F_MD8, buf, 1); | |
194 | if (ret) | |
195 | goto error; | |
196 | ||
197 | buf[0] = priv->regs[R0F_MD8] & ~(1 << 6); /* Freq_prog_Start */ | |
198 | ret = tda18218_wr_regs(priv, R0F_MD8, buf, 1); | |
199 | if (ret) | |
200 | goto error; | |
201 | ||
202 | /* trigger AGC */ | |
203 | for (i = 0; i < ARRAY_SIZE(agc); i++) { | |
204 | ret = tda18218_wr_reg(priv, agc[i][0], agc[i][1]); | |
205 | if (ret) | |
206 | goto error; | |
207 | } | |
208 | ||
209 | error: | |
210 | if (fe->ops.i2c_gate_ctrl) | |
211 | fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ | |
212 | ||
213 | if (ret) | |
9edd6987 | 214 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
51ff2e2c AP |
215 | |
216 | return ret; | |
217 | } | |
218 | ||
522fdf73 AP |
219 | static int tda18218_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
220 | { | |
221 | struct tda18218_priv *priv = fe->tuner_priv; | |
222 | *frequency = priv->if_frequency; | |
9edd6987 | 223 | dev_dbg(&priv->i2c->dev, "%s: if_frequency=%d\n", __func__, *frequency); |
522fdf73 AP |
224 | return 0; |
225 | } | |
226 | ||
51ff2e2c AP |
227 | static int tda18218_sleep(struct dvb_frontend *fe) |
228 | { | |
229 | struct tda18218_priv *priv = fe->tuner_priv; | |
230 | int ret; | |
231 | ||
232 | if (fe->ops.i2c_gate_ctrl) | |
233 | fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ | |
234 | ||
235 | /* standby */ | |
236 | ret = tda18218_wr_reg(priv, R17_PD1, priv->regs[R17_PD1] | (1 << 0)); | |
237 | ||
238 | if (fe->ops.i2c_gate_ctrl) | |
239 | fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ | |
240 | ||
241 | if (ret) | |
9edd6987 | 242 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
51ff2e2c AP |
243 | |
244 | return ret; | |
245 | } | |
246 | ||
247 | static int tda18218_init(struct dvb_frontend *fe) | |
248 | { | |
249 | struct tda18218_priv *priv = fe->tuner_priv; | |
250 | int ret; | |
251 | ||
252 | /* TODO: calibrations */ | |
253 | ||
254 | if (fe->ops.i2c_gate_ctrl) | |
255 | fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ | |
256 | ||
257 | ret = tda18218_wr_regs(priv, R00_ID, priv->regs, TDA18218_NUM_REGS); | |
258 | ||
259 | if (fe->ops.i2c_gate_ctrl) | |
260 | fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ | |
261 | ||
262 | if (ret) | |
9edd6987 | 263 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
51ff2e2c AP |
264 | |
265 | return ret; | |
266 | } | |
267 | ||
268 | static int tda18218_release(struct dvb_frontend *fe) | |
269 | { | |
270 | kfree(fe->tuner_priv); | |
271 | fe->tuner_priv = NULL; | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static const struct dvb_tuner_ops tda18218_tuner_ops = { | |
276 | .info = { | |
277 | .name = "NXP TDA18218", | |
278 | ||
279 | .frequency_min = 174000000, | |
280 | .frequency_max = 864000000, | |
281 | .frequency_step = 1000, | |
282 | }, | |
283 | ||
284 | .release = tda18218_release, | |
285 | .init = tda18218_init, | |
286 | .sleep = tda18218_sleep, | |
287 | ||
288 | .set_params = tda18218_set_params, | |
522fdf73 AP |
289 | |
290 | .get_if_frequency = tda18218_get_if_frequency, | |
51ff2e2c AP |
291 | }; |
292 | ||
293 | struct dvb_frontend *tda18218_attach(struct dvb_frontend *fe, | |
294 | struct i2c_adapter *i2c, struct tda18218_config *cfg) | |
295 | { | |
296 | struct tda18218_priv *priv = NULL; | |
ed2e3301 | 297 | u8 val; |
51ff2e2c AP |
298 | int ret; |
299 | /* chip default registers values */ | |
300 | static u8 def_regs[] = { | |
301 | 0xc0, 0x88, 0x00, 0x8e, 0x03, 0x00, 0x00, 0xd0, 0x00, 0x40, | |
302 | 0x00, 0x00, 0x07, 0xff, 0x84, 0x09, 0x00, 0x13, 0x00, 0x00, | |
303 | 0x01, 0x84, 0x09, 0xf0, 0x19, 0x0a, 0x8e, 0x69, 0x98, 0x01, | |
304 | 0x00, 0x58, 0x10, 0x40, 0x8c, 0x00, 0x0c, 0x48, 0x85, 0xc9, | |
305 | 0xa7, 0x00, 0x00, 0x00, 0x30, 0x81, 0x80, 0x00, 0x39, 0x00, | |
306 | 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf6, 0xf6 | |
307 | }; | |
308 | ||
309 | priv = kzalloc(sizeof(struct tda18218_priv), GFP_KERNEL); | |
310 | if (priv == NULL) | |
311 | return NULL; | |
312 | ||
313 | priv->cfg = cfg; | |
314 | priv->i2c = i2c; | |
315 | fe->tuner_priv = priv; | |
316 | ||
317 | if (fe->ops.i2c_gate_ctrl) | |
318 | fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ | |
319 | ||
320 | /* check if the tuner is there */ | |
321 | ret = tda18218_rd_reg(priv, R00_ID, &val); | |
ed2e3301 PB |
322 | if (!ret) |
323 | dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val); | |
51ff2e2c AP |
324 | if (ret || val != def_regs[R00_ID]) { |
325 | kfree(priv); | |
326 | return NULL; | |
327 | } | |
328 | ||
9edd6987 AP |
329 | dev_info(&priv->i2c->dev, |
330 | "%s: NXP TDA18218HN successfully identified\n", | |
331 | KBUILD_MODNAME); | |
51ff2e2c AP |
332 | |
333 | memcpy(&fe->ops.tuner_ops, &tda18218_tuner_ops, | |
334 | sizeof(struct dvb_tuner_ops)); | |
335 | memcpy(priv->regs, def_regs, sizeof(def_regs)); | |
336 | ||
337 | /* loop-through enabled chip default register values */ | |
338 | if (priv->cfg->loop_through) { | |
339 | priv->regs[R17_PD1] = 0xb0; | |
340 | priv->regs[R18_PD2] = 0x59; | |
341 | } | |
342 | ||
343 | /* standby */ | |
344 | ret = tda18218_wr_reg(priv, R17_PD1, priv->regs[R17_PD1] | (1 << 0)); | |
345 | if (ret) | |
9edd6987 | 346 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
51ff2e2c AP |
347 | |
348 | if (fe->ops.i2c_gate_ctrl) | |
349 | fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ | |
350 | ||
351 | return fe; | |
352 | } | |
353 | EXPORT_SYMBOL(tda18218_attach); | |
354 | ||
355 | MODULE_DESCRIPTION("NXP TDA18218HN silicon tuner driver"); | |
356 | MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); | |
357 | MODULE_LICENSE("GPL"); |