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1ae2c589 MP |
1 | /** |
2 | * Driver for Sharp IX2505V (marked B0017) DVB-S silicon tuner | |
3 | * | |
4 | * Copyright (C) 2010 Malcolm Priestley | |
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 Version 2, as | |
8 | * published by the Free Software Foundation. | |
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 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/dvb/frontend.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/types.h> | |
25 | ||
26 | #include "ix2505v.h" | |
27 | ||
28 | static int ix2505v_debug; | |
9d10f3d7 MCC |
29 | #define dprintk(level, args...) do { \ |
30 | if (ix2505v_debug & level) \ | |
31 | printk(KERN_DEBUG "ix2505v: " args); \ | |
32 | } while (0) | |
1ae2c589 MP |
33 | |
34 | #define deb_info(args...) dprintk(0x01, args) | |
35 | #define deb_i2c(args...) dprintk(0x02, args) | |
36 | ||
37 | struct ix2505v_state { | |
38 | struct i2c_adapter *i2c; | |
39 | const struct ix2505v_config *config; | |
40 | u32 frequency; | |
41 | }; | |
42 | ||
43 | /** | |
44 | * Data read format of the Sharp IX2505V B0017 | |
45 | * | |
46 | * byte1: 1 | 1 | 0 | 0 | 0 | MA1 | MA0 | 1 | |
47 | * byte2: POR | FL | RD2 | RD1 | RD0 | X | X | X | |
48 | * | |
49 | * byte1 = address | |
50 | * byte2; | |
9d10f3d7 | 51 | * POR = Power on Reset (VCC H=<2.2v L=>2.2v) |
1ae2c589 MP |
52 | * FL = Phase Lock (H=lock L=unlock) |
53 | * RD0-2 = Reserved internal operations | |
54 | * | |
55 | * Only POR can be used to check the tuner is present | |
56 | * | |
57 | * Caution: after byte2 the I2C reverts to write mode continuing to read | |
58 | * may corrupt tuning data. | |
59 | * | |
60 | */ | |
61 | ||
62 | static int ix2505v_read_status_reg(struct ix2505v_state *state) | |
63 | { | |
64 | u8 addr = state->config->tuner_address; | |
65 | u8 b2[] = {0}; | |
66 | int ret; | |
67 | ||
68 | struct i2c_msg msg[1] = { | |
69 | { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } | |
70 | }; | |
71 | ||
72 | ret = i2c_transfer(state->i2c, msg, 1); | |
73 | deb_i2c("Read %s ", __func__); | |
74 | ||
13d28e49 | 75 | return (ret == 1) ? (int) b2[0] : -1; |
1ae2c589 MP |
76 | } |
77 | ||
78 | static int ix2505v_write(struct ix2505v_state *state, u8 buf[], u8 count) | |
79 | { | |
80 | struct i2c_msg msg[1] = { | |
81 | { .addr = state->config->tuner_address, .flags = 0, | |
82 | .buf = buf, .len = count }, | |
83 | }; | |
84 | ||
85 | int ret; | |
86 | ||
87 | ret = i2c_transfer(state->i2c, msg, 1); | |
88 | ||
89 | if (ret != 1) { | |
90 | deb_i2c("%s: i2c error, ret=%d\n", __func__, ret); | |
91 | return -EIO; | |
92 | } | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | static int ix2505v_release(struct dvb_frontend *fe) | |
98 | { | |
99 | struct ix2505v_state *state = fe->tuner_priv; | |
100 | ||
101 | fe->tuner_priv = NULL; | |
102 | kfree(state); | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | /** | |
108 | * Data write format of the Sharp IX2505V B0017 | |
109 | * | |
110 | * byte1: 1 | 1 | 0 | 0 | 0 | 0(MA1)| 0(MA0)| 0 | |
111 | * byte2: 0 | BG1 | BG2 | N8 | N7 | N6 | N5 | N4 | |
112 | * byte3: N3 | N2 | N1 | A5 | A4 | A3 | A2 | A1 | |
113 | * byte4: 1 | 1(C1) | 1(C0) | PD5 | PD4 | TM | 0(RTS)| 1(REF) | |
114 | * byte5: BA2 | BA1 | BA0 | PSC | PD3 |PD2/TS2|DIV/TS1|PD0/TS0 | |
115 | * | |
116 | * byte1 = address | |
117 | * | |
118 | * Write order | |
119 | * 1) byte1 -> byte2 -> byte3 -> byte4 -> byte5 | |
120 | * 2) byte1 -> byte4 -> byte5 -> byte2 -> byte3 | |
121 | * 3) byte1 -> byte2 -> byte3 -> byte4 | |
122 | * 4) byte1 -> byte4 -> byte5 -> byte2 | |
123 | * 5) byte1 -> byte2 -> byte3 | |
124 | * 6) byte1 -> byte4 -> byte5 | |
125 | * 7) byte1 -> byte2 | |
126 | * 8) byte1 -> byte4 | |
127 | * | |
128 | * Recommended Setup | |
129 | * 1 -> 8 -> 6 | |
130 | */ | |
131 | ||
132 | static int ix2505v_set_params(struct dvb_frontend *fe, | |
133 | struct dvb_frontend_parameters *params) | |
134 | { | |
135 | struct ix2505v_state *state = fe->tuner_priv; | |
136 | u32 frequency = params->frequency; | |
137 | u32 b_w = (params->u.qpsk.symbol_rate * 27) / 32000; | |
138 | u32 div_factor, N , A, x; | |
139 | int ret = 0, len; | |
140 | u8 gain, cc, ref, psc, local_osc, lpf; | |
141 | u8 data[4] = {0}; | |
142 | ||
143 | if ((frequency < fe->ops.info.frequency_min) | |
144 | || (frequency > fe->ops.info.frequency_max)) | |
145 | return -EINVAL; | |
146 | ||
147 | if (state->config->tuner_gain) | |
148 | gain = (state->config->tuner_gain < 4) | |
149 | ? state->config->tuner_gain : 0; | |
150 | else | |
151 | gain = 0x0; | |
152 | ||
153 | if (state->config->tuner_chargepump) | |
154 | cc = state->config->tuner_chargepump; | |
155 | else | |
156 | cc = 0x3; | |
157 | ||
158 | ref = 8; /* REF =1 */ | |
159 | psc = 32; /* PSC = 0 */ | |
160 | ||
161 | div_factor = (frequency * ref) / 40; /* local osc = 4Mhz */ | |
162 | x = div_factor / psc; | |
163 | N = x/100; | |
164 | A = ((x - (N * 100)) * psc) / 100; | |
165 | ||
166 | data[0] = ((gain & 0x3) << 5) | (N >> 3); | |
167 | data[1] = (N << 5) | (A & 0x1f); | |
168 | data[2] = 0x81 | ((cc & 0x3) << 5) ; /*PD5,PD4 & TM = 0|C1,C0|REF=1*/ | |
169 | ||
9d10f3d7 | 170 | deb_info("Frq=%d x=%d N=%d A=%d\n", frequency, x, N, A); |
1ae2c589 MP |
171 | |
172 | if (frequency <= 1065000) | |
173 | local_osc = (6 << 5) | 2; | |
174 | else if (frequency <= 1170000) | |
175 | local_osc = (7 << 5) | 2; | |
176 | else if (frequency <= 1300000) | |
177 | local_osc = (1 << 5); | |
178 | else if (frequency <= 1445000) | |
179 | local_osc = (2 << 5); | |
180 | else if (frequency <= 1607000) | |
181 | local_osc = (3 << 5); | |
182 | else if (frequency <= 1778000) | |
183 | local_osc = (4 << 5); | |
184 | else if (frequency <= 1942000) | |
185 | local_osc = (5 << 5); | |
9d10f3d7 | 186 | else /*frequency up to 2150000*/ |
1ae2c589 MP |
187 | local_osc = (6 << 5); |
188 | ||
189 | data[3] = local_osc; /* all other bits set 0 */ | |
190 | ||
1ae2c589 MP |
191 | if (b_w <= 10000) |
192 | lpf = 0xc; | |
193 | else if (b_w <= 12000) | |
194 | lpf = 0x2; | |
195 | else if (b_w <= 14000) | |
196 | lpf = 0xa; | |
197 | else if (b_w <= 16000) | |
198 | lpf = 0x6; | |
199 | else if (b_w <= 18000) | |
200 | lpf = 0xe; | |
201 | else if (b_w <= 20000) | |
202 | lpf = 0x1; | |
203 | else if (b_w <= 22000) | |
204 | lpf = 0x9; | |
205 | else if (b_w <= 24000) | |
206 | lpf = 0x5; | |
207 | else if (b_w <= 26000) | |
208 | lpf = 0xd; | |
209 | else if (b_w <= 28000) | |
210 | lpf = 0x3; | |
211 | else | |
212 | lpf = 0xb; | |
213 | ||
214 | deb_info("Osc=%x b_w=%x lpf=%x\n", local_osc, b_w, lpf); | |
9d10f3d7 | 215 | deb_info("Data 0=[%x%x%x%x]\n", data[0], data[1], data[2], data[3]); |
1ae2c589 MP |
216 | |
217 | if (fe->ops.i2c_gate_ctrl) | |
218 | fe->ops.i2c_gate_ctrl(fe, 1); | |
219 | ||
220 | len = sizeof(data); | |
221 | ||
222 | ret |= ix2505v_write(state, data, len); | |
223 | ||
224 | data[2] |= 0x4; /* set TM = 1 other bits same */ | |
225 | ||
226 | len = 1; | |
227 | ret |= ix2505v_write(state, &data[2], len); /* write byte 4 only */ | |
228 | ||
1ae2c589 MP |
229 | msleep(10); |
230 | ||
231 | data[2] |= ((lpf >> 2) & 0x3) << 3; /* lpf */ | |
232 | data[3] |= (lpf & 0x3) << 2; | |
233 | ||
9d10f3d7 | 234 | deb_info("Data 2=[%x%x]\n", data[2], data[3]); |
1ae2c589 MP |
235 | |
236 | len = 2; | |
237 | ret |= ix2505v_write(state, &data[2], len); /* write byte 4 & 5 */ | |
238 | ||
239 | if (fe->ops.i2c_gate_ctrl) | |
240 | fe->ops.i2c_gate_ctrl(fe, 0); | |
241 | ||
242 | if (state->config->min_delay_ms) | |
243 | msleep(state->config->min_delay_ms); | |
244 | ||
245 | state->frequency = frequency; | |
246 | ||
247 | return ret; | |
248 | } | |
249 | ||
250 | static int ix2505v_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
251 | { | |
252 | struct ix2505v_state *state = fe->tuner_priv; | |
253 | ||
254 | *frequency = state->frequency; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | static struct dvb_tuner_ops ix2505v_tuner_ops = { | |
260 | .info = { | |
261 | .name = "Sharp IX2505V (B0017)", | |
262 | .frequency_min = 950000, | |
263 | .frequency_max = 2175000 | |
264 | }, | |
265 | .release = ix2505v_release, | |
266 | .set_params = ix2505v_set_params, | |
267 | .get_frequency = ix2505v_get_frequency, | |
268 | }; | |
269 | ||
270 | struct dvb_frontend *ix2505v_attach(struct dvb_frontend *fe, | |
271 | const struct ix2505v_config *config, | |
272 | struct i2c_adapter *i2c) | |
273 | { | |
274 | struct ix2505v_state *state = NULL; | |
275 | int ret; | |
276 | ||
277 | if (NULL == config) { | |
278 | deb_i2c("%s: no config ", __func__); | |
279 | goto error; | |
280 | } | |
281 | ||
282 | state = kzalloc(sizeof(struct ix2505v_state), GFP_KERNEL); | |
283 | if (NULL == state) | |
284 | return NULL; | |
285 | ||
286 | state->config = config; | |
287 | state->i2c = i2c; | |
288 | ||
289 | if (state->config->tuner_write_only) { | |
290 | if (fe->ops.i2c_gate_ctrl) | |
291 | fe->ops.i2c_gate_ctrl(fe, 1); | |
292 | ||
293 | ret = ix2505v_read_status_reg(state); | |
294 | ||
295 | if (ret & 0x80) { | |
296 | deb_i2c("%s: No IX2505V found\n", __func__); | |
297 | goto error; | |
298 | } | |
299 | ||
300 | if (fe->ops.i2c_gate_ctrl) | |
301 | fe->ops.i2c_gate_ctrl(fe, 0); | |
302 | } | |
303 | ||
304 | fe->tuner_priv = state; | |
305 | ||
306 | memcpy(&fe->ops.tuner_ops, &ix2505v_tuner_ops, | |
307 | sizeof(struct dvb_tuner_ops)); | |
308 | deb_i2c("%s: initialization (%s addr=0x%02x) ok\n", | |
309 | __func__, fe->ops.tuner_ops.info.name, config->tuner_address); | |
310 | ||
311 | return fe; | |
312 | ||
313 | error: | |
36fd9788 | 314 | kfree(state); |
1ae2c589 MP |
315 | return NULL; |
316 | } | |
317 | EXPORT_SYMBOL(ix2505v_attach); | |
318 | ||
319 | module_param_named(debug, ix2505v_debug, int, 0644); | |
320 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); | |
321 | MODULE_DESCRIPTION("DVB IX2505V tuner driver"); | |
322 | MODULE_AUTHOR("Malcolm Priestley"); | |
323 | MODULE_LICENSE("GPL"); |