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ee4b9dbb RR |
1 | /* |
2 | * saa7706.c Philips SAA7706H Car Radio DSP driver | |
3 | * Copyright (c) 2009 Intel Corporation | |
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 version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
ee4b9dbb RR |
13 | */ |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/i2c.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
ee4b9dbb | 23 | #include <media/v4l2-device.h> |
8ff61832 | 24 | #include <media/v4l2-ctrls.h> |
ee4b9dbb RR |
25 | |
26 | #define DRIVER_NAME "saa7706h" | |
27 | ||
28 | /* the I2C memory map looks like this | |
29 | ||
30 | $1C00 - $FFFF Not Used | |
31 | $2200 - $3FFF Reserved YRAM (DSP2) space | |
32 | $2000 - $21FF YRAM (DSP2) | |
33 | $1FF0 - $1FFF Hardware Registers | |
34 | $1280 - $1FEF Reserved XRAM (DSP2) space | |
35 | $1000 - $127F XRAM (DSP2) | |
36 | $0FFF DSP CONTROL | |
37 | $0A00 - $0FFE Reserved | |
38 | $0980 - $09FF Reserved YRAM (DSP1) space | |
39 | $0800 - $097F YRAM (DSP1) | |
40 | $0200 - $07FF Not Used | |
41 | $0180 - $01FF Reserved XRAM (DSP1) space | |
42 | $0000 - $017F XRAM (DSP1) | |
43 | */ | |
44 | ||
45 | #define SAA7706H_REG_CTRL 0x0fff | |
46 | #define SAA7706H_CTRL_BYP_PLL 0x0001 | |
47 | #define SAA7706H_CTRL_PLL_DIV_MASK 0x003e | |
48 | #define SAA7706H_CTRL_PLL3_62975MHZ 0x003e | |
49 | #define SAA7706H_CTRL_DSP_TURBO 0x0040 | |
50 | #define SAA7706H_CTRL_PC_RESET_DSP1 0x0080 | |
51 | #define SAA7706H_CTRL_PC_RESET_DSP2 0x0100 | |
52 | #define SAA7706H_CTRL_DSP1_ROM_EN_MASK 0x0600 | |
53 | #define SAA7706H_CTRL_DSP1_FUNC_PROM 0x0000 | |
54 | #define SAA7706H_CTRL_DSP2_ROM_EN_MASK 0x1800 | |
55 | #define SAA7706H_CTRL_DSP2_FUNC_PROM 0x0000 | |
56 | #define SAA7706H_CTRL_DIG_SIL_INTERPOL 0x8000 | |
57 | ||
58 | #define SAA7706H_REG_EVALUATION 0x1ff0 | |
59 | #define SAA7706H_EVAL_DISABLE_CHARGE_PUMP 0x000001 | |
60 | #define SAA7706H_EVAL_DCS_CLOCK 0x000002 | |
61 | #define SAA7706H_EVAL_GNDRC1_ENABLE 0x000004 | |
62 | #define SAA7706H_EVAL_GNDRC2_ENABLE 0x000008 | |
63 | ||
64 | #define SAA7706H_REG_CL_GEN1 0x1ff3 | |
65 | #define SAA7706H_CL_GEN1_MIN_LOOPGAIN_MASK 0x00000f | |
66 | #define SAA7706H_CL_GEN1_LOOPGAIN_MASK 0x0000f0 | |
67 | #define SAA7706H_CL_GEN1_COARSE_RATION 0xffff00 | |
68 | ||
69 | #define SAA7706H_REG_CL_GEN2 0x1ff4 | |
70 | #define SAA7706H_CL_GEN2_WSEDGE_FALLING 0x000001 | |
71 | #define SAA7706H_CL_GEN2_STOP_VCO 0x000002 | |
72 | #define SAA7706H_CL_GEN2_FRERUN 0x000004 | |
73 | #define SAA7706H_CL_GEN2_ADAPTIVE 0x000008 | |
74 | #define SAA7706H_CL_GEN2_FINE_RATIO_MASK 0x0ffff0 | |
75 | ||
76 | #define SAA7706H_REG_CL_GEN4 0x1ff6 | |
77 | #define SAA7706H_CL_GEN4_BYPASS_PLL1 0x001000 | |
78 | #define SAA7706H_CL_GEN4_PLL1_DIV_MASK 0x03e000 | |
79 | #define SAA7706H_CL_GEN4_DSP1_TURBO 0x040000 | |
80 | ||
81 | #define SAA7706H_REG_SEL 0x1ff7 | |
82 | #define SAA7706H_SEL_DSP2_SRCA_MASK 0x000007 | |
83 | #define SAA7706H_SEL_DSP2_FMTA_MASK 0x000031 | |
84 | #define SAA7706H_SEL_DSP2_SRCB_MASK 0x0001c0 | |
85 | #define SAA7706H_SEL_DSP2_FMTB_MASK 0x000e00 | |
86 | #define SAA7706H_SEL_DSP1_SRC_MASK 0x003000 | |
87 | #define SAA7706H_SEL_DSP1_FMT_MASK 0x01c003 | |
88 | #define SAA7706H_SEL_SPDIF2 0x020000 | |
89 | #define SAA7706H_SEL_HOST_IO_FMT_MASK 0x1c0000 | |
90 | #define SAA7706H_SEL_EN_HOST_IO 0x200000 | |
91 | ||
92 | #define SAA7706H_REG_IAC 0x1ff8 | |
93 | #define SAA7706H_REG_CLK_SET 0x1ff9 | |
94 | #define SAA7706H_REG_CLK_COEFF 0x1ffa | |
95 | #define SAA7706H_REG_INPUT_SENS 0x1ffb | |
96 | #define SAA7706H_INPUT_SENS_RDS_VOL_MASK 0x0003f | |
97 | #define SAA7706H_INPUT_SENS_FM_VOL_MASK 0x00fc0 | |
98 | #define SAA7706H_INPUT_SENS_FM_MPX 0x01000 | |
99 | #define SAA7706H_INPUT_SENS_OFF_FILTER_A_EN 0x02000 | |
100 | #define SAA7706H_INPUT_SENS_OFF_FILTER_B_EN 0x04000 | |
101 | #define SAA7706H_REG_PHONE_NAV_AUDIO 0x1ffc | |
102 | #define SAA7706H_REG_IO_CONF_DSP2 0x1ffd | |
103 | #define SAA7706H_REG_STATUS_DSP2 0x1ffe | |
104 | #define SAA7706H_REG_PC_DSP2 0x1fff | |
105 | ||
106 | #define SAA7706H_DSP1_MOD0 0x0800 | |
107 | #define SAA7706H_DSP1_ROM_VER 0x097f | |
108 | #define SAA7706H_DSP2_MPTR0 0x1000 | |
109 | ||
110 | #define SAA7706H_DSP1_MODPNTR 0x0000 | |
111 | ||
112 | #define SAA7706H_DSP2_XMEM_CONTLLCW 0x113e | |
113 | #define SAA7706H_DSP2_XMEM_BUSAMP 0x114a | |
114 | #define SAA7706H_DSP2_XMEM_FDACPNTR 0x11f9 | |
115 | #define SAA7706H_DSP2_XMEM_IIS1PNTR 0x11fb | |
116 | ||
117 | #define SAA7706H_DSP2_YMEM_PVGA 0x212a | |
118 | #define SAA7706H_DSP2_YMEM_PVAT1 0x212b | |
119 | #define SAA7706H_DSP2_YMEM_PVAT 0x212c | |
120 | #define SAA7706H_DSP2_YMEM_ROM_VER 0x21ff | |
121 | ||
122 | #define SUPPORTED_DSP1_ROM_VER 0x667 | |
123 | ||
124 | struct saa7706h_state { | |
125 | struct v4l2_subdev sd; | |
8ff61832 | 126 | struct v4l2_ctrl_handler hdl; |
ee4b9dbb RR |
127 | unsigned muted; |
128 | }; | |
129 | ||
130 | static inline struct saa7706h_state *to_state(struct v4l2_subdev *sd) | |
131 | { | |
132 | return container_of(sd, struct saa7706h_state, sd); | |
133 | } | |
134 | ||
135 | static int saa7706h_i2c_send(struct i2c_client *client, const u8 *data, int len) | |
136 | { | |
137 | int err = i2c_master_send(client, data, len); | |
138 | if (err == len) | |
139 | return 0; | |
140 | return err > 0 ? -EIO : err; | |
141 | } | |
142 | ||
143 | static int saa7706h_i2c_transfer(struct i2c_client *client, | |
144 | struct i2c_msg *msgs, int num) | |
145 | { | |
146 | int err = i2c_transfer(client->adapter, msgs, num); | |
147 | if (err == num) | |
148 | return 0; | |
149 | return err > 0 ? -EIO : err; | |
150 | } | |
151 | ||
152 | static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val) | |
153 | { | |
154 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
155 | u8 buf[5]; | |
156 | int pos = 0; | |
157 | ||
158 | buf[pos++] = reg >> 8; | |
159 | buf[pos++] = reg; | |
160 | buf[pos++] = val >> 16; | |
161 | buf[pos++] = val >> 8; | |
162 | buf[pos++] = val; | |
163 | ||
164 | return saa7706h_i2c_send(client, buf, pos); | |
165 | } | |
166 | ||
167 | static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val, | |
168 | int *err) | |
169 | { | |
170 | return *err ? *err : saa7706h_set_reg24(sd, reg, val); | |
171 | } | |
172 | ||
173 | static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val) | |
174 | { | |
175 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
176 | u8 buf[4]; | |
177 | int pos = 0; | |
178 | ||
179 | buf[pos++] = reg >> 8; | |
180 | buf[pos++] = reg; | |
181 | buf[pos++] = val >> 8; | |
182 | buf[pos++] = val; | |
183 | ||
184 | return saa7706h_i2c_send(client, buf, pos); | |
185 | } | |
186 | ||
187 | static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val, | |
188 | int *err) | |
189 | { | |
190 | return *err ? *err : saa7706h_set_reg16(sd, reg, val); | |
191 | } | |
192 | ||
193 | static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg) | |
194 | { | |
195 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
196 | u8 buf[2]; | |
197 | int err; | |
198 | u8 regaddr[] = {reg >> 8, reg}; | |
c43737aa S |
199 | struct i2c_msg msg[] = { |
200 | { | |
201 | .addr = client->addr, | |
202 | .len = sizeof(regaddr), | |
203 | .buf = regaddr | |
204 | }, | |
205 | { | |
206 | .addr = client->addr, | |
207 | .flags = I2C_M_RD, | |
208 | .len = sizeof(buf), | |
209 | .buf = buf | |
210 | } | |
211 | }; | |
ee4b9dbb RR |
212 | |
213 | err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg)); | |
214 | if (err) | |
215 | return err; | |
216 | ||
217 | return buf[0] << 8 | buf[1]; | |
218 | } | |
219 | ||
220 | static int saa7706h_unmute(struct v4l2_subdev *sd) | |
221 | { | |
222 | struct saa7706h_state *state = to_state(sd); | |
223 | int err = 0; | |
224 | ||
225 | err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL, | |
226 | SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 | | |
227 | SAA7706H_CTRL_PC_RESET_DSP2, &err); | |
228 | ||
229 | /* newer versions of the chip requires a small sleep after reset */ | |
230 | msleep(1); | |
231 | ||
232 | err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL, | |
233 | SAA7706H_CTRL_PLL3_62975MHZ, &err); | |
234 | ||
235 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err); | |
236 | ||
237 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err); | |
238 | ||
239 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2, | |
240 | SAA7706H_CL_GEN2_WSEDGE_FALLING, &err); | |
241 | ||
242 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err); | |
243 | ||
244 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err); | |
245 | ||
246 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err); | |
247 | ||
248 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err); | |
249 | ||
250 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a, | |
251 | &err); | |
252 | ||
253 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7, | |
254 | &err); | |
255 | ||
256 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO, | |
257 | 0x0e22ff, &err); | |
258 | ||
259 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8, | |
260 | &err); | |
261 | ||
262 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003, | |
263 | &err); | |
264 | ||
265 | err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err); | |
266 | ||
267 | err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err); | |
268 | ||
269 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err); | |
270 | ||
271 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err); | |
272 | ||
273 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err); | |
274 | ||
275 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819, | |
276 | &err); | |
277 | ||
278 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a, | |
279 | &err); | |
280 | ||
281 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff, | |
282 | &err); | |
283 | ||
284 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb, | |
285 | &err); | |
286 | ||
287 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb, | |
288 | &err); | |
289 | ||
290 | err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err); | |
291 | ||
292 | err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800, | |
293 | &err); | |
294 | ||
295 | err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err); | |
296 | ||
297 | err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905, | |
298 | &err); | |
299 | if (!err) | |
300 | state->muted = 0; | |
301 | return err; | |
302 | } | |
303 | ||
304 | static int saa7706h_mute(struct v4l2_subdev *sd) | |
305 | { | |
306 | struct saa7706h_state *state = to_state(sd); | |
307 | int err; | |
308 | ||
309 | err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL, | |
310 | SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 | | |
311 | SAA7706H_CTRL_PC_RESET_DSP2); | |
312 | if (!err) | |
313 | state->muted = 1; | |
314 | return err; | |
315 | } | |
316 | ||
8ff61832 | 317 | static int saa7706h_s_ctrl(struct v4l2_ctrl *ctrl) |
ee4b9dbb | 318 | { |
8ff61832 HV |
319 | struct saa7706h_state *state = |
320 | container_of(ctrl->handler, struct saa7706h_state, hdl); | |
ee4b9dbb RR |
321 | |
322 | switch (ctrl->id) { | |
323 | case V4L2_CID_AUDIO_MUTE: | |
8ff61832 HV |
324 | if (ctrl->val) |
325 | return saa7706h_mute(&state->sd); | |
326 | return saa7706h_unmute(&state->sd); | |
ee4b9dbb RR |
327 | } |
328 | return -EINVAL; | |
329 | } | |
330 | ||
8ff61832 HV |
331 | static const struct v4l2_ctrl_ops saa7706h_ctrl_ops = { |
332 | .s_ctrl = saa7706h_s_ctrl, | |
333 | }; | |
ee4b9dbb | 334 | |
387a6924 | 335 | static const struct v4l2_subdev_ops empty_ops = {}; |
ee4b9dbb RR |
336 | |
337 | /* | |
338 | * Generic i2c probe | |
339 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
340 | */ | |
341 | ||
4c62e976 GKH |
342 | static int saa7706h_probe(struct i2c_client *client, |
343 | const struct i2c_device_id *id) | |
ee4b9dbb RR |
344 | { |
345 | struct saa7706h_state *state; | |
346 | struct v4l2_subdev *sd; | |
347 | int err; | |
348 | ||
349 | /* Check if the adapter supports the needed features */ | |
350 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
351 | return -EIO; | |
352 | ||
353 | v4l_info(client, "chip found @ 0x%02x (%s)\n", | |
354 | client->addr << 1, client->adapter->name); | |
355 | ||
80845a33 | 356 | state = kzalloc(sizeof(struct saa7706h_state), GFP_KERNEL); |
ee4b9dbb RR |
357 | if (state == NULL) |
358 | return -ENOMEM; | |
359 | sd = &state->sd; | |
387a6924 | 360 | v4l2_i2c_subdev_init(sd, client, &empty_ops); |
ee4b9dbb | 361 | |
8ff61832 HV |
362 | v4l2_ctrl_handler_init(&state->hdl, 4); |
363 | v4l2_ctrl_new_std(&state->hdl, &saa7706h_ctrl_ops, | |
364 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); | |
365 | sd->ctrl_handler = &state->hdl; | |
366 | err = state->hdl.error; | |
367 | if (err) | |
368 | goto err; | |
369 | ||
ee4b9dbb RR |
370 | /* check the rom versions */ |
371 | err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER); | |
372 | if (err < 0) | |
373 | goto err; | |
374 | if (err != SUPPORTED_DSP1_ROM_VER) | |
375 | v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err); | |
ee4b9dbb RR |
376 | state->muted = 1; |
377 | ||
378 | /* startup in a muted state */ | |
379 | err = saa7706h_mute(sd); | |
380 | if (err) | |
381 | goto err; | |
382 | ||
383 | return 0; | |
384 | ||
385 | err: | |
386 | v4l2_device_unregister_subdev(sd); | |
8ff61832 | 387 | v4l2_ctrl_handler_free(&state->hdl); |
ee4b9dbb RR |
388 | kfree(to_state(sd)); |
389 | ||
390 | printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err); | |
391 | ||
392 | return err; | |
393 | } | |
394 | ||
4c62e976 | 395 | static int saa7706h_remove(struct i2c_client *client) |
ee4b9dbb RR |
396 | { |
397 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
8ff61832 | 398 | struct saa7706h_state *state = to_state(sd); |
ee4b9dbb RR |
399 | |
400 | saa7706h_mute(sd); | |
401 | v4l2_device_unregister_subdev(sd); | |
8ff61832 | 402 | v4l2_ctrl_handler_free(&state->hdl); |
ee4b9dbb RR |
403 | kfree(to_state(sd)); |
404 | return 0; | |
405 | } | |
406 | ||
407 | static const struct i2c_device_id saa7706h_id[] = { | |
408 | {DRIVER_NAME, 0}, | |
409 | {}, | |
410 | }; | |
411 | ||
412 | MODULE_DEVICE_TABLE(i2c, saa7706h_id); | |
413 | ||
414 | static struct i2c_driver saa7706h_driver = { | |
415 | .driver = { | |
ee4b9dbb RR |
416 | .name = DRIVER_NAME, |
417 | }, | |
418 | .probe = saa7706h_probe, | |
4c62e976 | 419 | .remove = saa7706h_remove, |
ee4b9dbb RR |
420 | .id_table = saa7706h_id, |
421 | }; | |
422 | ||
c6e8d86f | 423 | module_i2c_driver(saa7706h_driver); |
ee4b9dbb RR |
424 | |
425 | MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver"); | |
426 | MODULE_AUTHOR("Mocean Laboratories"); | |
427 | MODULE_LICENSE("GPL v2"); |