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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4521af78 | 2 | /* |
1ae2c589 MP |
3 | * Driver for Sharp IX2505V (marked B0017) DVB-S silicon tuner |
4 | * | |
5 | * Copyright (C) 2010 Malcolm Priestley | |
1ae2c589 MP |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/dvb/frontend.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/types.h> | |
12 | ||
13 | #include "ix2505v.h" | |
14 | ||
15 | static int ix2505v_debug; | |
9d10f3d7 MCC |
16 | #define dprintk(level, args...) do { \ |
17 | if (ix2505v_debug & level) \ | |
18 | printk(KERN_DEBUG "ix2505v: " args); \ | |
19 | } while (0) | |
1ae2c589 MP |
20 | |
21 | #define deb_info(args...) dprintk(0x01, args) | |
22 | #define deb_i2c(args...) dprintk(0x02, args) | |
23 | ||
24 | struct ix2505v_state { | |
25 | struct i2c_adapter *i2c; | |
26 | const struct ix2505v_config *config; | |
27 | u32 frequency; | |
28 | }; | |
29 | ||
4521af78 | 30 | /* |
1ae2c589 MP |
31 | * Data read format of the Sharp IX2505V B0017 |
32 | * | |
33 | * byte1: 1 | 1 | 0 | 0 | 0 | MA1 | MA0 | 1 | |
34 | * byte2: POR | FL | RD2 | RD1 | RD0 | X | X | X | |
35 | * | |
36 | * byte1 = address | |
37 | * byte2; | |
9d10f3d7 | 38 | * POR = Power on Reset (VCC H=<2.2v L=>2.2v) |
1ae2c589 MP |
39 | * FL = Phase Lock (H=lock L=unlock) |
40 | * RD0-2 = Reserved internal operations | |
41 | * | |
42 | * Only POR can be used to check the tuner is present | |
43 | * | |
44 | * Caution: after byte2 the I2C reverts to write mode continuing to read | |
45 | * may corrupt tuning data. | |
46 | * | |
47 | */ | |
48 | ||
49 | static int ix2505v_read_status_reg(struct ix2505v_state *state) | |
50 | { | |
51 | u8 addr = state->config->tuner_address; | |
52 | u8 b2[] = {0}; | |
53 | int ret; | |
54 | ||
55 | struct i2c_msg msg[1] = { | |
56 | { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } | |
57 | }; | |
58 | ||
59 | ret = i2c_transfer(state->i2c, msg, 1); | |
60 | deb_i2c("Read %s ", __func__); | |
61 | ||
13d28e49 | 62 | return (ret == 1) ? (int) b2[0] : -1; |
1ae2c589 MP |
63 | } |
64 | ||
65 | static int ix2505v_write(struct ix2505v_state *state, u8 buf[], u8 count) | |
66 | { | |
67 | struct i2c_msg msg[1] = { | |
68 | { .addr = state->config->tuner_address, .flags = 0, | |
69 | .buf = buf, .len = count }, | |
70 | }; | |
71 | ||
72 | int ret; | |
73 | ||
74 | ret = i2c_transfer(state->i2c, msg, 1); | |
75 | ||
76 | if (ret != 1) { | |
77 | deb_i2c("%s: i2c error, ret=%d\n", __func__, ret); | |
78 | return -EIO; | |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
f2709c20 MCC |
84 | static void ix2505v_release(struct dvb_frontend *fe) |
85 | { | |
86 | struct ix2505v_state *state = fe->tuner_priv; | |
87 | ||
88 | fe->tuner_priv = NULL; | |
89 | kfree(state); | |
90 | ||
91 | } | |
92 | ||
4521af78 | 93 | /* |
1ae2c589 MP |
94 | * Data write format of the Sharp IX2505V B0017 |
95 | * | |
96 | * byte1: 1 | 1 | 0 | 0 | 0 | 0(MA1)| 0(MA0)| 0 | |
97 | * byte2: 0 | BG1 | BG2 | N8 | N7 | N6 | N5 | N4 | |
98 | * byte3: N3 | N2 | N1 | A5 | A4 | A3 | A2 | A1 | |
99 | * byte4: 1 | 1(C1) | 1(C0) | PD5 | PD4 | TM | 0(RTS)| 1(REF) | |
100 | * byte5: BA2 | BA1 | BA0 | PSC | PD3 |PD2/TS2|DIV/TS1|PD0/TS0 | |
101 | * | |
102 | * byte1 = address | |
103 | * | |
104 | * Write order | |
105 | * 1) byte1 -> byte2 -> byte3 -> byte4 -> byte5 | |
106 | * 2) byte1 -> byte4 -> byte5 -> byte2 -> byte3 | |
107 | * 3) byte1 -> byte2 -> byte3 -> byte4 | |
108 | * 4) byte1 -> byte4 -> byte5 -> byte2 | |
109 | * 5) byte1 -> byte2 -> byte3 | |
110 | * 6) byte1 -> byte4 -> byte5 | |
111 | * 7) byte1 -> byte2 | |
112 | * 8) byte1 -> byte4 | |
113 | * | |
114 | * Recommended Setup | |
115 | * 1 -> 8 -> 6 | |
116 | */ | |
117 | ||
14d24d14 | 118 | static int ix2505v_set_params(struct dvb_frontend *fe) |
1ae2c589 | 119 | { |
3cc66df6 | 120 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
1ae2c589 | 121 | struct ix2505v_state *state = fe->tuner_priv; |
3cc66df6 MCC |
122 | u32 frequency = c->frequency; |
123 | u32 b_w = (c->symbol_rate * 27) / 32000; | |
1ae2c589 MP |
124 | u32 div_factor, N , A, x; |
125 | int ret = 0, len; | |
126 | u8 gain, cc, ref, psc, local_osc, lpf; | |
127 | u8 data[4] = {0}; | |
128 | ||
f1b1eabf MCC |
129 | if ((frequency < fe->ops.info.frequency_min_hz / kHz) |
130 | || (frequency > fe->ops.info.frequency_max_hz / kHz)) | |
1ae2c589 MP |
131 | return -EINVAL; |
132 | ||
133 | if (state->config->tuner_gain) | |
134 | gain = (state->config->tuner_gain < 4) | |
135 | ? state->config->tuner_gain : 0; | |
136 | else | |
137 | gain = 0x0; | |
138 | ||
139 | if (state->config->tuner_chargepump) | |
140 | cc = state->config->tuner_chargepump; | |
141 | else | |
142 | cc = 0x3; | |
143 | ||
144 | ref = 8; /* REF =1 */ | |
145 | psc = 32; /* PSC = 0 */ | |
146 | ||
147 | div_factor = (frequency * ref) / 40; /* local osc = 4Mhz */ | |
148 | x = div_factor / psc; | |
149 | N = x/100; | |
150 | A = ((x - (N * 100)) * psc) / 100; | |
151 | ||
152 | data[0] = ((gain & 0x3) << 5) | (N >> 3); | |
153 | data[1] = (N << 5) | (A & 0x1f); | |
154 | data[2] = 0x81 | ((cc & 0x3) << 5) ; /*PD5,PD4 & TM = 0|C1,C0|REF=1*/ | |
155 | ||
9d10f3d7 | 156 | deb_info("Frq=%d x=%d N=%d A=%d\n", frequency, x, N, A); |
1ae2c589 MP |
157 | |
158 | if (frequency <= 1065000) | |
159 | local_osc = (6 << 5) | 2; | |
160 | else if (frequency <= 1170000) | |
161 | local_osc = (7 << 5) | 2; | |
162 | else if (frequency <= 1300000) | |
163 | local_osc = (1 << 5); | |
164 | else if (frequency <= 1445000) | |
165 | local_osc = (2 << 5); | |
166 | else if (frequency <= 1607000) | |
167 | local_osc = (3 << 5); | |
168 | else if (frequency <= 1778000) | |
169 | local_osc = (4 << 5); | |
170 | else if (frequency <= 1942000) | |
171 | local_osc = (5 << 5); | |
9d10f3d7 | 172 | else /*frequency up to 2150000*/ |
1ae2c589 MP |
173 | local_osc = (6 << 5); |
174 | ||
175 | data[3] = local_osc; /* all other bits set 0 */ | |
176 | ||
1ae2c589 MP |
177 | if (b_w <= 10000) |
178 | lpf = 0xc; | |
179 | else if (b_w <= 12000) | |
180 | lpf = 0x2; | |
181 | else if (b_w <= 14000) | |
182 | lpf = 0xa; | |
183 | else if (b_w <= 16000) | |
184 | lpf = 0x6; | |
185 | else if (b_w <= 18000) | |
186 | lpf = 0xe; | |
187 | else if (b_w <= 20000) | |
188 | lpf = 0x1; | |
189 | else if (b_w <= 22000) | |
190 | lpf = 0x9; | |
191 | else if (b_w <= 24000) | |
192 | lpf = 0x5; | |
193 | else if (b_w <= 26000) | |
194 | lpf = 0xd; | |
195 | else if (b_w <= 28000) | |
196 | lpf = 0x3; | |
197 | else | |
198 | lpf = 0xb; | |
199 | ||
200 | deb_info("Osc=%x b_w=%x lpf=%x\n", local_osc, b_w, lpf); | |
aa735ee9 | 201 | deb_info("Data 0=[%4phN]\n", data); |
1ae2c589 MP |
202 | |
203 | if (fe->ops.i2c_gate_ctrl) | |
204 | fe->ops.i2c_gate_ctrl(fe, 1); | |
205 | ||
206 | len = sizeof(data); | |
1ae2c589 MP |
207 | ret |= ix2505v_write(state, data, len); |
208 | ||
209 | data[2] |= 0x4; /* set TM = 1 other bits same */ | |
210 | ||
853e3b29 MP |
211 | if (fe->ops.i2c_gate_ctrl) |
212 | fe->ops.i2c_gate_ctrl(fe, 1); | |
213 | ||
1ae2c589 MP |
214 | len = 1; |
215 | ret |= ix2505v_write(state, &data[2], len); /* write byte 4 only */ | |
216 | ||
1ae2c589 MP |
217 | msleep(10); |
218 | ||
219 | data[2] |= ((lpf >> 2) & 0x3) << 3; /* lpf */ | |
220 | data[3] |= (lpf & 0x3) << 2; | |
221 | ||
9d10f3d7 | 222 | deb_info("Data 2=[%x%x]\n", data[2], data[3]); |
1ae2c589 | 223 | |
853e3b29 MP |
224 | if (fe->ops.i2c_gate_ctrl) |
225 | fe->ops.i2c_gate_ctrl(fe, 1); | |
226 | ||
1ae2c589 MP |
227 | len = 2; |
228 | ret |= ix2505v_write(state, &data[2], len); /* write byte 4 & 5 */ | |
229 | ||
1ae2c589 MP |
230 | if (state->config->min_delay_ms) |
231 | msleep(state->config->min_delay_ms); | |
232 | ||
233 | state->frequency = frequency; | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | static int ix2505v_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
239 | { | |
240 | struct ix2505v_state *state = fe->tuner_priv; | |
241 | ||
242 | *frequency = state->frequency; | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
14c4bf3c | 247 | static const struct dvb_tuner_ops ix2505v_tuner_ops = { |
1ae2c589 MP |
248 | .info = { |
249 | .name = "Sharp IX2505V (B0017)", | |
a3f90c75 MCC |
250 | .frequency_min_hz = 950 * MHz, |
251 | .frequency_max_hz = 2175 * MHz | |
1ae2c589 | 252 | }, |
f2709c20 | 253 | .release = ix2505v_release, |
1ae2c589 MP |
254 | .set_params = ix2505v_set_params, |
255 | .get_frequency = ix2505v_get_frequency, | |
256 | }; | |
257 | ||
258 | struct dvb_frontend *ix2505v_attach(struct dvb_frontend *fe, | |
259 | const struct ix2505v_config *config, | |
260 | struct i2c_adapter *i2c) | |
261 | { | |
262 | struct ix2505v_state *state = NULL; | |
263 | int ret; | |
264 | ||
265 | if (NULL == config) { | |
266 | deb_i2c("%s: no config ", __func__); | |
267 | goto error; | |
268 | } | |
269 | ||
270 | state = kzalloc(sizeof(struct ix2505v_state), GFP_KERNEL); | |
271 | if (NULL == state) | |
272 | return NULL; | |
273 | ||
274 | state->config = config; | |
275 | state->i2c = i2c; | |
276 | ||
277 | if (state->config->tuner_write_only) { | |
278 | if (fe->ops.i2c_gate_ctrl) | |
279 | fe->ops.i2c_gate_ctrl(fe, 1); | |
280 | ||
281 | ret = ix2505v_read_status_reg(state); | |
282 | ||
283 | if (ret & 0x80) { | |
284 | deb_i2c("%s: No IX2505V found\n", __func__); | |
285 | goto error; | |
286 | } | |
287 | ||
288 | if (fe->ops.i2c_gate_ctrl) | |
289 | fe->ops.i2c_gate_ctrl(fe, 0); | |
290 | } | |
291 | ||
292 | fe->tuner_priv = state; | |
293 | ||
294 | memcpy(&fe->ops.tuner_ops, &ix2505v_tuner_ops, | |
295 | sizeof(struct dvb_tuner_ops)); | |
296 | deb_i2c("%s: initialization (%s addr=0x%02x) ok\n", | |
297 | __func__, fe->ops.tuner_ops.info.name, config->tuner_address); | |
298 | ||
299 | return fe; | |
300 | ||
301 | error: | |
36fd9788 | 302 | kfree(state); |
1ae2c589 MP |
303 | return NULL; |
304 | } | |
305 | EXPORT_SYMBOL(ix2505v_attach); | |
306 | ||
307 | module_param_named(debug, ix2505v_debug, int, 0644); | |
308 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); | |
309 | MODULE_DESCRIPTION("DVB IX2505V tuner driver"); | |
310 | MODULE_AUTHOR("Malcolm Priestley"); | |
311 | MODULE_LICENSE("GPL"); |