tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/delay.h>
22#include <linux/errno.h>
23#include <linux/kernel.h>
24#include <linux/interrupt.h>
25#include <linux/i2c.h>
26#include <linux/slab.h>
27#include <media/v4l2-device.h>
28#include <media/v4l2-chip-ident.h>
29
30#define DRIVER_NAME "saa7706h"
31
32/* the I2C memory map looks like this
33
34 $1C00 - $FFFF Not Used
35 $2200 - $3FFF Reserved YRAM (DSP2) space
36 $2000 - $21FF YRAM (DSP2)
37 $1FF0 - $1FFF Hardware Registers
38 $1280 - $1FEF Reserved XRAM (DSP2) space
39 $1000 - $127F XRAM (DSP2)
40 $0FFF DSP CONTROL
41 $0A00 - $0FFE Reserved
42 $0980 - $09FF Reserved YRAM (DSP1) space
43 $0800 - $097F YRAM (DSP1)
44 $0200 - $07FF Not Used
45 $0180 - $01FF Reserved XRAM (DSP1) space
46 $0000 - $017F XRAM (DSP1)
47*/
48
49#define SAA7706H_REG_CTRL 0x0fff
50#define SAA7706H_CTRL_BYP_PLL 0x0001
51#define SAA7706H_CTRL_PLL_DIV_MASK 0x003e
52#define SAA7706H_CTRL_PLL3_62975MHZ 0x003e
53#define SAA7706H_CTRL_DSP_TURBO 0x0040
54#define SAA7706H_CTRL_PC_RESET_DSP1 0x0080
55#define SAA7706H_CTRL_PC_RESET_DSP2 0x0100
56#define SAA7706H_CTRL_DSP1_ROM_EN_MASK 0x0600
57#define SAA7706H_CTRL_DSP1_FUNC_PROM 0x0000
58#define SAA7706H_CTRL_DSP2_ROM_EN_MASK 0x1800
59#define SAA7706H_CTRL_DSP2_FUNC_PROM 0x0000
60#define SAA7706H_CTRL_DIG_SIL_INTERPOL 0x8000
61
62#define SAA7706H_REG_EVALUATION 0x1ff0
63#define SAA7706H_EVAL_DISABLE_CHARGE_PUMP 0x000001
64#define SAA7706H_EVAL_DCS_CLOCK 0x000002
65#define SAA7706H_EVAL_GNDRC1_ENABLE 0x000004
66#define SAA7706H_EVAL_GNDRC2_ENABLE 0x000008
67
68#define SAA7706H_REG_CL_GEN1 0x1ff3
69#define SAA7706H_CL_GEN1_MIN_LOOPGAIN_MASK 0x00000f
70#define SAA7706H_CL_GEN1_LOOPGAIN_MASK 0x0000f0
71#define SAA7706H_CL_GEN1_COARSE_RATION 0xffff00
72
73#define SAA7706H_REG_CL_GEN2 0x1ff4
74#define SAA7706H_CL_GEN2_WSEDGE_FALLING 0x000001
75#define SAA7706H_CL_GEN2_STOP_VCO 0x000002
76#define SAA7706H_CL_GEN2_FRERUN 0x000004
77#define SAA7706H_CL_GEN2_ADAPTIVE 0x000008
78#define SAA7706H_CL_GEN2_FINE_RATIO_MASK 0x0ffff0
79
80#define SAA7706H_REG_CL_GEN4 0x1ff6
81#define SAA7706H_CL_GEN4_BYPASS_PLL1 0x001000
82#define SAA7706H_CL_GEN4_PLL1_DIV_MASK 0x03e000
83#define SAA7706H_CL_GEN4_DSP1_TURBO 0x040000
84
85#define SAA7706H_REG_SEL 0x1ff7
86#define SAA7706H_SEL_DSP2_SRCA_MASK 0x000007
87#define SAA7706H_SEL_DSP2_FMTA_MASK 0x000031
88#define SAA7706H_SEL_DSP2_SRCB_MASK 0x0001c0
89#define SAA7706H_SEL_DSP2_FMTB_MASK 0x000e00
90#define SAA7706H_SEL_DSP1_SRC_MASK 0x003000
91#define SAA7706H_SEL_DSP1_FMT_MASK 0x01c003
92#define SAA7706H_SEL_SPDIF2 0x020000
93#define SAA7706H_SEL_HOST_IO_FMT_MASK 0x1c0000
94#define SAA7706H_SEL_EN_HOST_IO 0x200000
95
96#define SAA7706H_REG_IAC 0x1ff8
97#define SAA7706H_REG_CLK_SET 0x1ff9
98#define SAA7706H_REG_CLK_COEFF 0x1ffa
99#define SAA7706H_REG_INPUT_SENS 0x1ffb
100#define SAA7706H_INPUT_SENS_RDS_VOL_MASK 0x0003f
101#define SAA7706H_INPUT_SENS_FM_VOL_MASK 0x00fc0
102#define SAA7706H_INPUT_SENS_FM_MPX 0x01000
103#define SAA7706H_INPUT_SENS_OFF_FILTER_A_EN 0x02000
104#define SAA7706H_INPUT_SENS_OFF_FILTER_B_EN 0x04000
105#define SAA7706H_REG_PHONE_NAV_AUDIO 0x1ffc
106#define SAA7706H_REG_IO_CONF_DSP2 0x1ffd
107#define SAA7706H_REG_STATUS_DSP2 0x1ffe
108#define SAA7706H_REG_PC_DSP2 0x1fff
109
110#define SAA7706H_DSP1_MOD0 0x0800
111#define SAA7706H_DSP1_ROM_VER 0x097f
112#define SAA7706H_DSP2_MPTR0 0x1000
113
114#define SAA7706H_DSP1_MODPNTR 0x0000
115
116#define SAA7706H_DSP2_XMEM_CONTLLCW 0x113e
117#define SAA7706H_DSP2_XMEM_BUSAMP 0x114a
118#define SAA7706H_DSP2_XMEM_FDACPNTR 0x11f9
119#define SAA7706H_DSP2_XMEM_IIS1PNTR 0x11fb
120
121#define SAA7706H_DSP2_YMEM_PVGA 0x212a
122#define SAA7706H_DSP2_YMEM_PVAT1 0x212b
123#define SAA7706H_DSP2_YMEM_PVAT 0x212c
124#define SAA7706H_DSP2_YMEM_ROM_VER 0x21ff
125
126#define SUPPORTED_DSP1_ROM_VER 0x667
127
128struct saa7706h_state {
129 struct v4l2_subdev sd;
130 unsigned muted;
131};
132
133static inline struct saa7706h_state *to_state(struct v4l2_subdev *sd)
134{
135 return container_of(sd, struct saa7706h_state, sd);
136}
137
138static int saa7706h_i2c_send(struct i2c_client *client, const u8 *data, int len)
139{
140 int err = i2c_master_send(client, data, len);
141 if (err == len)
142 return 0;
143 return err > 0 ? -EIO : err;
144}
145
146static int saa7706h_i2c_transfer(struct i2c_client *client,
147 struct i2c_msg *msgs, int num)
148{
149 int err = i2c_transfer(client->adapter, msgs, num);
150 if (err == num)
151 return 0;
152 return err > 0 ? -EIO : err;
153}
154
155static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val)
156{
157 struct i2c_client *client = v4l2_get_subdevdata(sd);
158 u8 buf[5];
159 int pos = 0;
160
161 buf[pos++] = reg >> 8;
162 buf[pos++] = reg;
163 buf[pos++] = val >> 16;
164 buf[pos++] = val >> 8;
165 buf[pos++] = val;
166
167 return saa7706h_i2c_send(client, buf, pos);
168}
169
170static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val,
171 int *err)
172{
173 return *err ? *err : saa7706h_set_reg24(sd, reg, val);
174}
175
176static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val)
177{
178 struct i2c_client *client = v4l2_get_subdevdata(sd);
179 u8 buf[4];
180 int pos = 0;
181
182 buf[pos++] = reg >> 8;
183 buf[pos++] = reg;
184 buf[pos++] = val >> 8;
185 buf[pos++] = val;
186
187 return saa7706h_i2c_send(client, buf, pos);
188}
189
190static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val,
191 int *err)
192{
193 return *err ? *err : saa7706h_set_reg16(sd, reg, val);
194}
195
196static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg)
197{
198 struct i2c_client *client = v4l2_get_subdevdata(sd);
199 u8 buf[2];
200 int err;
201 u8 regaddr[] = {reg >> 8, reg};
202 struct i2c_msg msg[] = { {client->addr, 0, sizeof(regaddr), regaddr},
203 {client->addr, I2C_M_RD, sizeof(buf), buf} };
204
205 err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg));
206 if (err)
207 return err;
208
209 return buf[0] << 8 | buf[1];
210}
211
212static int saa7706h_unmute(struct v4l2_subdev *sd)
213{
214 struct saa7706h_state *state = to_state(sd);
215 int err = 0;
216
217 err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
218 SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
219 SAA7706H_CTRL_PC_RESET_DSP2, &err);
220
221 /* newer versions of the chip requires a small sleep after reset */
222 msleep(1);
223
224 err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
225 SAA7706H_CTRL_PLL3_62975MHZ, &err);
226
227 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err);
228
229 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err);
230
231 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2,
232 SAA7706H_CL_GEN2_WSEDGE_FALLING, &err);
233
234 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err);
235
236 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err);
237
238 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err);
239
240 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err);
241
242 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a,
243 &err);
244
245 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7,
246 &err);
247
248 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO,
249 0x0e22ff, &err);
250
251 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8,
252 &err);
253
254 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003,
255 &err);
256
257 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err);
258
259 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err);
260
261 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err);
262
263 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err);
264
265 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err);
266
267 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819,
268 &err);
269
270 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a,
271 &err);
272
273 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff,
274 &err);
275
276 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb,
277 &err);
278
279 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb,
280 &err);
281
282 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err);
283
284 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800,
285 &err);
286
287 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err);
288
289 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905,
290 &err);
291 if (!err)
292 state->muted = 0;
293 return err;
294}
295
296static int saa7706h_mute(struct v4l2_subdev *sd)
297{
298 struct saa7706h_state *state = to_state(sd);
299 int err;
300
301 err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL,
302 SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
303 SAA7706H_CTRL_PC_RESET_DSP2);
304 if (!err)
305 state->muted = 1;
306 return err;
307}
308
309static int saa7706h_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
310{
311 switch (qc->id) {
312 case V4L2_CID_AUDIO_MUTE:
313 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
314 }
315 return -EINVAL;
316}
317
318static int saa7706h_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
319{
320 struct saa7706h_state *state = to_state(sd);
321
322 switch (ctrl->id) {
323 case V4L2_CID_AUDIO_MUTE:
324 ctrl->value = state->muted;
325 return 0;
326 }
327 return -EINVAL;
328}
329
330static int saa7706h_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
331{
332 switch (ctrl->id) {
333 case V4L2_CID_AUDIO_MUTE:
334 if (ctrl->value)
335 return saa7706h_mute(sd);
336 return saa7706h_unmute(sd);
337 }
338 return -EINVAL;
339}
340
341static int saa7706h_g_chip_ident(struct v4l2_subdev *sd,
342 struct v4l2_dbg_chip_ident *chip)
343{
344 struct i2c_client *client = v4l2_get_subdevdata(sd);
345
346 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7706H, 0);
347}
348
349static const struct v4l2_subdev_core_ops saa7706h_core_ops = {
350 .g_chip_ident = saa7706h_g_chip_ident,
351 .queryctrl = saa7706h_queryctrl,
352 .g_ctrl = saa7706h_g_ctrl,
353 .s_ctrl = saa7706h_s_ctrl,
354};
355
356static const struct v4l2_subdev_ops saa7706h_ops = {
357 .core = &saa7706h_core_ops,
358};
359
360/*
361 * Generic i2c probe
362 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
363 */
364
365static int __devinit saa7706h_probe(struct i2c_client *client,
366 const struct i2c_device_id *id)
367{
368 struct saa7706h_state *state;
369 struct v4l2_subdev *sd;
370 int err;
371
372 /* Check if the adapter supports the needed features */
373 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
374 return -EIO;
375
376 v4l_info(client, "chip found @ 0x%02x (%s)\n",
377 client->addr << 1, client->adapter->name);
378
379 state = kmalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
380 if (state == NULL)
381 return -ENOMEM;
382 sd = &state->sd;
383 v4l2_i2c_subdev_init(sd, client, &saa7706h_ops);
384
385 /* check the rom versions */
386 err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER);
387 if (err < 0)
388 goto err;
389 if (err != SUPPORTED_DSP1_ROM_VER)
390 v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err);
391
392 state->muted = 1;
393
394 /* startup in a muted state */
395 err = saa7706h_mute(sd);
396 if (err)
397 goto err;
398
399 return 0;
400
401err:
402 v4l2_device_unregister_subdev(sd);
403 kfree(to_state(sd));
404
405 printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err);
406
407 return err;
408}
409
410static int __devexit saa7706h_remove(struct i2c_client *client)
411{
412 struct v4l2_subdev *sd = i2c_get_clientdata(client);
413
414 saa7706h_mute(sd);
415 v4l2_device_unregister_subdev(sd);
416 kfree(to_state(sd));
417 return 0;
418}
419
420static const struct i2c_device_id saa7706h_id[] = {
421 {DRIVER_NAME, 0},
422 {},
423};
424
425MODULE_DEVICE_TABLE(i2c, saa7706h_id);
426
427static struct i2c_driver saa7706h_driver = {
428 .driver = {
429 .owner = THIS_MODULE,
430 .name = DRIVER_NAME,
431 },
432 .probe = saa7706h_probe,
433 .remove = saa7706h_remove,
434 .id_table = saa7706h_id,
435};
436
437static __init int saa7706h_init(void)
438{
439 return i2c_add_driver(&saa7706h_driver);
440}
441
442static __exit void saa7706h_exit(void)
443{
444 i2c_del_driver(&saa7706h_driver);
445}
446
447module_init(saa7706h_init);
448module_exit(saa7706h_exit);
449
450MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver");
451MODULE_AUTHOR("Mocean Laboratories");
452MODULE_LICENSE("GPL v2");