1 | /* $NetBSD: cx24227.c,v 1.7 2015/03/07 14:16:51 jmcneill Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2008, 2011 Jonathan A. Kollasch |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
17 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
20 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
21 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
25 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
26 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #include <sys/cdefs.h> |
30 | __KERNEL_RCSID(0, "$NetBSD: cx24227.c,v 1.7 2015/03/07 14:16:51 jmcneill Exp $" ); |
31 | |
32 | #include <sys/param.h> |
33 | #include <sys/systm.h> |
34 | #include <sys/device.h> |
35 | #include <sys/kmem.h> |
36 | #include <sys/module.h> |
37 | |
38 | #include <dev/i2c/cx24227var.h> |
39 | |
40 | /* #define CX24227_DEBUG */ |
41 | |
42 | struct cx24227 { |
43 | device_t parent; |
44 | i2c_tag_t tag; |
45 | i2c_addr_t addr; |
46 | }; |
47 | |
48 | static int cx24227_writereg(struct cx24227 *, uint8_t, uint16_t); |
49 | static int cx24227_readreg(struct cx24227 *, uint8_t, uint16_t *); |
50 | |
51 | static int cx24227_init(struct cx24227 *); |
52 | |
53 | static struct documentation_wanted { |
54 | uint8_t r; |
55 | uint16_t v; |
56 | } documentation_wanted[] = { |
57 | { 0x00, 0x0071, }, |
58 | { 0x01, 0x3213, }, |
59 | { 0x09, 0x0025, }, |
60 | { 0x1c, 0x001d, }, |
61 | { 0x1f, 0x002d, }, |
62 | { 0x20, 0x001d, }, |
63 | { 0x22, 0x0022, }, |
64 | { 0x23, 0x0020, }, |
65 | { 0x29, 0x110f, }, |
66 | { 0x2a, 0x10b4, }, |
67 | { 0x2b, 0x10ae, }, |
68 | { 0x2c, 0x0031, }, |
69 | { 0x31, 0x010d, }, |
70 | { 0x32, 0x0100, }, |
71 | { 0x44, 0x0510, }, |
72 | { 0x54, 0x0104, }, |
73 | { 0x58, 0x2222, }, |
74 | { 0x59, 0x1162, }, |
75 | { 0x5a, 0x3211, }, |
76 | { 0x5d, 0x0370, }, |
77 | { 0x5e, 0x0296, }, |
78 | { 0x61, 0x0010, }, |
79 | { 0x63, 0x4a00, }, |
80 | { 0x65, 0x0800, }, |
81 | { 0x71, 0x0003, }, |
82 | { 0x72, 0x0470, }, |
83 | { 0x81, 0x0002, }, |
84 | { 0x82, 0x0600, }, |
85 | { 0x86, 0x0002, }, |
86 | { 0x8a, 0x2c38, }, |
87 | { 0x8b, 0x2a37, }, |
88 | { 0x92, 0x302f, }, |
89 | { 0x93, 0x3332, }, |
90 | { 0x96, 0x000c, }, |
91 | { 0x99, 0x0101, }, |
92 | { 0x9c, 0x2e37, }, |
93 | { 0x9d, 0x2c37, }, |
94 | { 0x9e, 0x2c37, }, |
95 | { 0xab, 0x0100, }, |
96 | { 0xac, 0x1003, }, |
97 | { 0xad, 0x103f, }, |
98 | { 0xe2, 0x0100, }, |
99 | { 0xe3, 0x1000, }, |
100 | { 0x28, 0x1010, }, |
101 | { 0xb1, 0x000e, }, |
102 | }; |
103 | |
104 | |
105 | static int |
106 | cx24227_writereg(struct cx24227 *sc, uint8_t reg, uint16_t data) |
107 | { |
108 | int error; |
109 | uint8_t r[3]; |
110 | |
111 | if (iic_acquire_bus(sc->tag, I2C_F_POLL) != 0) |
112 | return false; |
113 | |
114 | r[0] = reg; |
115 | r[1] = (data >> 8) & 0xff; |
116 | r[2] = data & 0xff; |
117 | error = iic_exec(sc->tag, I2C_OP_WRITE_WITH_STOP, sc->addr, |
118 | r, 3, NULL, 0, I2C_F_POLL); |
119 | |
120 | iic_release_bus(sc->tag, I2C_F_POLL); |
121 | |
122 | return error; |
123 | } |
124 | |
125 | static int |
126 | cx24227_readreg(struct cx24227 *sc, uint8_t reg, uint16_t *data) |
127 | { |
128 | int error; |
129 | uint8_t r[2]; |
130 | |
131 | *data = 0x0000; |
132 | |
133 | if (iic_acquire_bus(sc->tag, I2C_F_POLL) != 0) |
134 | return -1; |
135 | |
136 | error = iic_exec(sc->tag, I2C_OP_READ_WITH_STOP, sc->addr, |
137 | ®, 1, r, 2, I2C_F_POLL); |
138 | |
139 | iic_release_bus(sc->tag, I2C_F_POLL); |
140 | |
141 | *data |= r[0] << 8; |
142 | *data |= r[1]; |
143 | |
144 | return error; |
145 | } |
146 | |
147 | uint16_t |
148 | cx24227_get_signal(struct cx24227 *sc) |
149 | { |
150 | uint16_t sig = 0; |
151 | |
152 | cx24227_readreg(sc, 0xf1, &sig); |
153 | |
154 | return sig; |
155 | } |
156 | |
157 | fe_status_t |
158 | cx24227_get_dtv_status(struct cx24227 *sc) |
159 | { |
160 | uint16_t reg; |
161 | fe_status_t status = 0; |
162 | |
163 | cx24227_readreg(sc, 0xf1, ®); |
164 | |
165 | if(reg & 0x1000) |
166 | status = FE_HAS_VITERBI | FE_HAS_CARRIER | FE_HAS_SIGNAL; |
167 | if(reg & 0x8000) |
168 | status |= FE_HAS_LOCK | FE_HAS_SYNC; |
169 | |
170 | return status; |
171 | } |
172 | |
173 | int |
174 | cx24227_set_modulation(struct cx24227 *sc, fe_modulation_t modulation) |
175 | { |
176 | switch (modulation) { |
177 | case VSB_8: |
178 | case QAM_64: |
179 | case QAM_256: |
180 | case QAM_AUTO: |
181 | break; |
182 | default: |
183 | return EINVAL; |
184 | } |
185 | |
186 | /* soft reset */ |
187 | cx24227_writereg(sc, 0xf5, 0x0000); |
188 | cx24227_writereg(sc, 0xf5, 0x0001); |
189 | |
190 | switch (modulation) { |
191 | case VSB_8: |
192 | /* VSB8 */ |
193 | cx24227_writereg(sc, 0xf4, 0x0000); |
194 | break; |
195 | default: |
196 | /* QAM */ |
197 | cx24227_writereg(sc, 0xf4, 0x0001); |
198 | cx24227_writereg(sc, 0x85, 0x0110); |
199 | break; |
200 | } |
201 | |
202 | /* soft reset */ |
203 | cx24227_writereg(sc, 0xf5, 0x0000); |
204 | cx24227_writereg(sc, 0xf5, 0x0001); |
205 | |
206 | #if 0 |
207 | delay(100); |
208 | |
209 | /* open the i2c gate */ |
210 | cx24227_writereg(sc, 0xf3, 0x0001); |
211 | |
212 | /* we could tune in here? */ |
213 | |
214 | /* close the i2c gate */ |
215 | cx24227_writereg(sc, 0xf3, 0x0000); |
216 | |
217 | #endif |
218 | return 0; |
219 | } |
220 | |
221 | void |
222 | cx24227_enable(struct cx24227* sc, bool enable) |
223 | { |
224 | if (enable == true) { |
225 | cx24227_init(sc); |
226 | } |
227 | } |
228 | |
229 | struct cx24227 * |
230 | cx24227_open(device_t parent, i2c_tag_t tag, i2c_addr_t addr) |
231 | { |
232 | struct cx24227 *sc; |
233 | int e; |
234 | uint16_t value; |
235 | |
236 | sc = kmem_alloc(sizeof(*sc), KM_SLEEP); |
237 | if (sc == NULL) |
238 | return NULL; |
239 | |
240 | sc->parent = parent; |
241 | sc->tag = tag; |
242 | sc->addr = addr; |
243 | |
244 | /* read chip ids */ |
245 | value = 0; |
246 | e = cx24227_readreg(sc, 0x04, &value); |
247 | if (e) { |
248 | device_printf(parent, "cx24227: read failed: %d\n" , e); |
249 | kmem_free(sc, sizeof(*sc)); |
250 | return NULL; |
251 | } |
252 | #ifdef CX24227_DEBUG |
253 | device_printf(parent, "cx24227: chipid %04x\n" , value); |
254 | #endif |
255 | |
256 | |
257 | value = 0x0001; /* open the i2c gate */ |
258 | e = cx24227_writereg(sc, 0xf3, value); |
259 | #if 0 |
260 | if (e) { |
261 | device_printf(parent, "cx24227: write failed: %d\n" , e); |
262 | kmem_free(sc, sizeof(*sc)); |
263 | return NULL; |
264 | } |
265 | #endif |
266 | |
267 | cx24227_init(sc); |
268 | |
269 | return sc; |
270 | } |
271 | |
272 | void |
273 | cx24227_close(struct cx24227 *sc) |
274 | { |
275 | kmem_free(sc, sizeof(*sc)); |
276 | } |
277 | |
278 | |
279 | static void |
280 | cx24227_sleepreset(struct cx24227 *sc) |
281 | { |
282 | cx24227_writereg(sc, 0xf2, 0); |
283 | cx24227_writereg(sc, 0xfa, 0); |
284 | } |
285 | |
286 | static int |
287 | cx24227_init(struct cx24227 *sc) |
288 | { |
289 | unsigned int i; |
290 | uint16_t reg; |
291 | |
292 | cx24227_sleepreset(sc); |
293 | |
294 | for(i = 0; i < __arraycount(documentation_wanted); i++) |
295 | cx24227_writereg(sc, documentation_wanted[i].r, documentation_wanted[i].v); |
296 | |
297 | /* Serial */ |
298 | cx24227_readreg(sc, 0xab, ®); |
299 | reg |= 0x0100; |
300 | cx24227_writereg(sc, 0xab, reg); |
301 | |
302 | /* no spectral inversion */ |
303 | cx24227_writereg(sc, 0x1b, 0x0110); |
304 | |
305 | /* 44MHz IF */ |
306 | cx24227_writereg(sc, 0x87, 0x01be); |
307 | cx24227_writereg(sc, 0x88, 0x0436); |
308 | cx24227_writereg(sc, 0x89, 0x054d); |
309 | |
310 | /* GPIO on */ |
311 | cx24227_readreg(sc, 0xe3, ®); |
312 | reg |= 0x1100; |
313 | cx24227_writereg(sc, 0xe3, reg); |
314 | |
315 | /* clocking */ |
316 | cx24227_readreg(sc, 0xac, ®); |
317 | reg &= ~0x3000; |
318 | reg |= 0x1000; |
319 | cx24227_writereg(sc, 0xac, reg); |
320 | |
321 | /* soft reset */ |
322 | cx24227_writereg(sc, 0xf5, 0x0000); |
323 | cx24227_writereg(sc, 0xf5, 0x0001); |
324 | |
325 | /* open gate */ |
326 | cx24227_writereg(sc, 0xf3, 0x0001); |
327 | |
328 | return 0; |
329 | } |
330 | |
331 | MODULE(MODULE_CLASS_DRIVER, cx24227, "i2cexec" ); |
332 | |
333 | static int |
334 | cx24227_modcmd(modcmd_t cmd, void *priv) |
335 | { |
336 | if (cmd == MODULE_CMD_INIT || cmd == MODULE_CMD_FINI) |
337 | return 0; |
338 | return ENOTTY; |
339 | } |
340 | |