[media] marvell-cam: Basic working MMP camera driver
[linux-2.6.git] / drivers / media / video / adv7180.c
1 /*
2  * adv7180.c Analog Devices ADV7180 video decoder 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/errno.h>
22 #include <linux/kernel.h>
23 #include <linux/interrupt.h>
24 #include <linux/i2c.h>
25 #include <linux/slab.h>
26 #include <media/v4l2-ioctl.h>
27 #include <linux/videodev2.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-chip-ident.h>
30 #include <linux/mutex.h>
31
32 #define DRIVER_NAME "adv7180"
33
34 #define ADV7180_INPUT_CONTROL_REG                       0x00
35 #define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM    0x00
36 #define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM_PED 0x10
37 #define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_J_SECAM     0x20
38 #define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_M_SECAM     0x30
39 #define ADV7180_INPUT_CONTROL_NTSC_J                    0x40
40 #define ADV7180_INPUT_CONTROL_NTSC_M                    0x50
41 #define ADV7180_INPUT_CONTROL_PAL60                     0x60
42 #define ADV7180_INPUT_CONTROL_NTSC_443                  0x70
43 #define ADV7180_INPUT_CONTROL_PAL_BG                    0x80
44 #define ADV7180_INPUT_CONTROL_PAL_N                     0x90
45 #define ADV7180_INPUT_CONTROL_PAL_M                     0xa0
46 #define ADV7180_INPUT_CONTROL_PAL_M_PED                 0xb0
47 #define ADV7180_INPUT_CONTROL_PAL_COMB_N                0xc0
48 #define ADV7180_INPUT_CONTROL_PAL_COMB_N_PED            0xd0
49 #define ADV7180_INPUT_CONTROL_PAL_SECAM                 0xe0
50 #define ADV7180_INPUT_CONTROL_PAL_SECAM_PED             0xf0
51
52 #define ADV7180_EXTENDED_OUTPUT_CONTROL_REG             0x04
53 #define ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS         0xC5
54
55 #define ADV7180_AUTODETECT_ENABLE_REG                   0x07
56 #define ADV7180_AUTODETECT_DEFAULT                      0x7f
57
58 #define ADV7180_ADI_CTRL_REG                            0x0e
59 #define ADV7180_ADI_CTRL_IRQ_SPACE                      0x20
60
61 #define ADV7180_STATUS1_REG                             0x10
62 #define ADV7180_STATUS1_IN_LOCK         0x01
63 #define ADV7180_STATUS1_AUTOD_MASK      0x70
64 #define ADV7180_STATUS1_AUTOD_NTSM_M_J  0x00
65 #define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10
66 #define ADV7180_STATUS1_AUTOD_PAL_M     0x20
67 #define ADV7180_STATUS1_AUTOD_PAL_60    0x30
68 #define ADV7180_STATUS1_AUTOD_PAL_B_G   0x40
69 #define ADV7180_STATUS1_AUTOD_SECAM     0x50
70 #define ADV7180_STATUS1_AUTOD_PAL_COMB  0x60
71 #define ADV7180_STATUS1_AUTOD_SECAM_525 0x70
72
73 #define ADV7180_IDENT_REG 0x11
74 #define ADV7180_ID_7180 0x18
75
76 #define ADV7180_ICONF1_ADI              0x40
77 #define ADV7180_ICONF1_ACTIVE_LOW       0x01
78 #define ADV7180_ICONF1_PSYNC_ONLY       0x10
79 #define ADV7180_ICONF1_ACTIVE_TO_CLR    0xC0
80
81 #define ADV7180_IRQ1_LOCK       0x01
82 #define ADV7180_IRQ1_UNLOCK     0x02
83 #define ADV7180_ISR1_ADI        0x42
84 #define ADV7180_ICR1_ADI        0x43
85 #define ADV7180_IMR1_ADI        0x44
86 #define ADV7180_IMR2_ADI        0x48
87 #define ADV7180_IRQ3_AD_CHANGE  0x08
88 #define ADV7180_ISR3_ADI        0x4A
89 #define ADV7180_ICR3_ADI        0x4B
90 #define ADV7180_IMR3_ADI        0x4C
91 #define ADV7180_IMR4_ADI        0x50
92
93 struct adv7180_state {
94         struct v4l2_subdev      sd;
95         struct work_struct      work;
96         struct mutex            mutex; /* mutual excl. when accessing chip */
97         int                     irq;
98         v4l2_std_id             curr_norm;
99         bool                    autodetect;
100 };
101
102 static v4l2_std_id adv7180_std_to_v4l2(u8 status1)
103 {
104         switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
105         case ADV7180_STATUS1_AUTOD_NTSM_M_J:
106                 return V4L2_STD_NTSC;
107         case ADV7180_STATUS1_AUTOD_NTSC_4_43:
108                 return V4L2_STD_NTSC_443;
109         case ADV7180_STATUS1_AUTOD_PAL_M:
110                 return V4L2_STD_PAL_M;
111         case ADV7180_STATUS1_AUTOD_PAL_60:
112                 return V4L2_STD_PAL_60;
113         case ADV7180_STATUS1_AUTOD_PAL_B_G:
114                 return V4L2_STD_PAL;
115         case ADV7180_STATUS1_AUTOD_SECAM:
116                 return V4L2_STD_SECAM;
117         case ADV7180_STATUS1_AUTOD_PAL_COMB:
118                 return V4L2_STD_PAL_Nc | V4L2_STD_PAL_N;
119         case ADV7180_STATUS1_AUTOD_SECAM_525:
120                 return V4L2_STD_SECAM;
121         default:
122                 return V4L2_STD_UNKNOWN;
123         }
124 }
125
126 static int v4l2_std_to_adv7180(v4l2_std_id std)
127 {
128         if (std == V4L2_STD_PAL_60)
129                 return ADV7180_INPUT_CONTROL_PAL60;
130         if (std == V4L2_STD_NTSC_443)
131                 return ADV7180_INPUT_CONTROL_NTSC_443;
132         if (std == V4L2_STD_PAL_N)
133                 return ADV7180_INPUT_CONTROL_PAL_N;
134         if (std == V4L2_STD_PAL_M)
135                 return ADV7180_INPUT_CONTROL_PAL_M;
136         if (std == V4L2_STD_PAL_Nc)
137                 return ADV7180_INPUT_CONTROL_PAL_COMB_N;
138
139         if (std & V4L2_STD_PAL)
140                 return ADV7180_INPUT_CONTROL_PAL_BG;
141         if (std & V4L2_STD_NTSC)
142                 return ADV7180_INPUT_CONTROL_NTSC_M;
143         if (std & V4L2_STD_SECAM)
144                 return ADV7180_INPUT_CONTROL_PAL_SECAM;
145
146         return -EINVAL;
147 }
148
149 static u32 adv7180_status_to_v4l2(u8 status1)
150 {
151         if (!(status1 & ADV7180_STATUS1_IN_LOCK))
152                 return V4L2_IN_ST_NO_SIGNAL;
153
154         return 0;
155 }
156
157 static int __adv7180_status(struct i2c_client *client, u32 *status,
158         v4l2_std_id *std)
159 {
160         int status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG);
161
162         if (status1 < 0)
163                 return status1;
164
165         if (status)
166                 *status = adv7180_status_to_v4l2(status1);
167         if (std)
168                 *std = adv7180_std_to_v4l2(status1);
169
170         return 0;
171 }
172
173 static inline struct adv7180_state *to_state(struct v4l2_subdev *sd)
174 {
175         return container_of(sd, struct adv7180_state, sd);
176 }
177
178 static int adv7180_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
179 {
180         struct adv7180_state *state = to_state(sd);
181         int err = mutex_lock_interruptible(&state->mutex);
182         if (err)
183                 return err;
184
185         /* when we are interrupt driven we know the state */
186         if (!state->autodetect || state->irq > 0)
187                 *std = state->curr_norm;
188         else
189                 err = __adv7180_status(v4l2_get_subdevdata(sd), NULL, std);
190
191         mutex_unlock(&state->mutex);
192         return err;
193 }
194
195 static int adv7180_g_input_status(struct v4l2_subdev *sd, u32 *status)
196 {
197         struct adv7180_state *state = to_state(sd);
198         int ret = mutex_lock_interruptible(&state->mutex);
199         if (ret)
200                 return ret;
201
202         ret = __adv7180_status(v4l2_get_subdevdata(sd), status, NULL);
203         mutex_unlock(&state->mutex);
204         return ret;
205 }
206
207 static int adv7180_g_chip_ident(struct v4l2_subdev *sd,
208         struct v4l2_dbg_chip_ident *chip)
209 {
210         struct i2c_client *client = v4l2_get_subdevdata(sd);
211
212         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7180, 0);
213 }
214
215 static int adv7180_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
216 {
217         struct adv7180_state *state = to_state(sd);
218         struct i2c_client *client = v4l2_get_subdevdata(sd);
219         int ret = mutex_lock_interruptible(&state->mutex);
220         if (ret)
221                 return ret;
222
223         /* all standards -> autodetect */
224         if (std == V4L2_STD_ALL) {
225                 ret = i2c_smbus_write_byte_data(client,
226                         ADV7180_INPUT_CONTROL_REG,
227                         ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM);
228                 if (ret < 0)
229                         goto out;
230
231                 __adv7180_status(client, NULL, &state->curr_norm);
232                 state->autodetect = true;
233         } else {
234                 ret = v4l2_std_to_adv7180(std);
235                 if (ret < 0)
236                         goto out;
237
238                 ret = i2c_smbus_write_byte_data(client,
239                         ADV7180_INPUT_CONTROL_REG, ret);
240                 if (ret < 0)
241                         goto out;
242
243                 state->curr_norm = std;
244                 state->autodetect = false;
245         }
246         ret = 0;
247 out:
248         mutex_unlock(&state->mutex);
249         return ret;
250 }
251
252 static const struct v4l2_subdev_video_ops adv7180_video_ops = {
253         .querystd = adv7180_querystd,
254         .g_input_status = adv7180_g_input_status,
255 };
256
257 static const struct v4l2_subdev_core_ops adv7180_core_ops = {
258         .g_chip_ident = adv7180_g_chip_ident,
259         .s_std = adv7180_s_std,
260 };
261
262 static const struct v4l2_subdev_ops adv7180_ops = {
263         .core = &adv7180_core_ops,
264         .video = &adv7180_video_ops,
265 };
266
267 static void adv7180_work(struct work_struct *work)
268 {
269         struct adv7180_state *state = container_of(work, struct adv7180_state,
270                 work);
271         struct i2c_client *client = v4l2_get_subdevdata(&state->sd);
272         u8 isr3;
273
274         mutex_lock(&state->mutex);
275         i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
276                 ADV7180_ADI_CTRL_IRQ_SPACE);
277         isr3 = i2c_smbus_read_byte_data(client, ADV7180_ISR3_ADI);
278         /* clear */
279         i2c_smbus_write_byte_data(client, ADV7180_ICR3_ADI, isr3);
280         i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, 0);
281
282         if (isr3 & ADV7180_IRQ3_AD_CHANGE && state->autodetect)
283                 __adv7180_status(client, NULL, &state->curr_norm);
284         mutex_unlock(&state->mutex);
285
286         enable_irq(state->irq);
287 }
288
289 static irqreturn_t adv7180_irq(int irq, void *devid)
290 {
291         struct adv7180_state *state = devid;
292
293         schedule_work(&state->work);
294
295         disable_irq_nosync(state->irq);
296
297         return IRQ_HANDLED;
298 }
299
300 /*
301  * Generic i2c probe
302  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
303  */
304
305 static __devinit int adv7180_probe(struct i2c_client *client,
306                         const struct i2c_device_id *id)
307 {
308         struct adv7180_state *state;
309         struct v4l2_subdev *sd;
310         int ret;
311
312         /* Check if the adapter supports the needed features */
313         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
314                 return -EIO;
315
316         v4l_info(client, "chip found @ 0x%02x (%s)\n",
317                         client->addr << 1, client->adapter->name);
318
319         state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL);
320         if (state == NULL) {
321                 ret = -ENOMEM;
322                 goto err;
323         }
324
325         state->irq = client->irq;
326         INIT_WORK(&state->work, adv7180_work);
327         mutex_init(&state->mutex);
328         state->autodetect = true;
329         sd = &state->sd;
330         v4l2_i2c_subdev_init(sd, client, &adv7180_ops);
331
332         /* Initialize adv7180 */
333         /* Enable autodetection */
334         ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG,
335                 ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM);
336         if (ret < 0)
337                 goto err_unreg_subdev;
338
339         ret = i2c_smbus_write_byte_data(client, ADV7180_AUTODETECT_ENABLE_REG,
340                 ADV7180_AUTODETECT_DEFAULT);
341         if (ret < 0)
342                 goto err_unreg_subdev;
343
344         /* ITU-R BT.656-4 compatible */
345         ret = i2c_smbus_write_byte_data(client,
346                 ADV7180_EXTENDED_OUTPUT_CONTROL_REG,
347                 ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS);
348         if (ret < 0)
349                 goto err_unreg_subdev;
350
351         /* read current norm */
352         __adv7180_status(client, NULL, &state->curr_norm);
353
354         /* register for interrupts */
355         if (state->irq > 0) {
356                 ret = request_irq(state->irq, adv7180_irq, 0, DRIVER_NAME,
357                         state);
358                 if (ret)
359                         goto err_unreg_subdev;
360
361                 ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
362                         ADV7180_ADI_CTRL_IRQ_SPACE);
363                 if (ret < 0)
364                         goto err_unreg_subdev;
365
366                 /* config the Interrupt pin to be active low */
367                 ret = i2c_smbus_write_byte_data(client, ADV7180_ICONF1_ADI,
368                         ADV7180_ICONF1_ACTIVE_LOW | ADV7180_ICONF1_PSYNC_ONLY);
369                 if (ret < 0)
370                         goto err_unreg_subdev;
371
372                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR1_ADI, 0);
373                 if (ret < 0)
374                         goto err_unreg_subdev;
375
376                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR2_ADI, 0);
377                 if (ret < 0)
378                         goto err_unreg_subdev;
379
380                 /* enable AD change interrupts interrupts */
381                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR3_ADI,
382                         ADV7180_IRQ3_AD_CHANGE);
383                 if (ret < 0)
384                         goto err_unreg_subdev;
385
386                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR4_ADI, 0);
387                 if (ret < 0)
388                         goto err_unreg_subdev;
389
390                 ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
391                         0);
392                 if (ret < 0)
393                         goto err_unreg_subdev;
394         }
395
396         return 0;
397
398 err_unreg_subdev:
399         mutex_destroy(&state->mutex);
400         v4l2_device_unregister_subdev(sd);
401         kfree(state);
402 err:
403         printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", ret);
404         return ret;
405 }
406
407 static __devexit int adv7180_remove(struct i2c_client *client)
408 {
409         struct v4l2_subdev *sd = i2c_get_clientdata(client);
410         struct adv7180_state *state = to_state(sd);
411
412         if (state->irq > 0) {
413                 free_irq(client->irq, state);
414                 if (cancel_work_sync(&state->work)) {
415                         /*
416                          * Work was pending, therefore we need to enable
417                          * IRQ here to balance the disable_irq() done in the
418                          * interrupt handler.
419                          */
420                         enable_irq(state->irq);
421                 }
422         }
423
424         mutex_destroy(&state->mutex);
425         v4l2_device_unregister_subdev(sd);
426         kfree(to_state(sd));
427         return 0;
428 }
429
430 static const struct i2c_device_id adv7180_id[] = {
431         {DRIVER_NAME, 0},
432         {},
433 };
434
435 MODULE_DEVICE_TABLE(i2c, adv7180_id);
436
437 static struct i2c_driver adv7180_driver = {
438         .driver = {
439                 .owner  = THIS_MODULE,
440                 .name   = DRIVER_NAME,
441         },
442         .probe          = adv7180_probe,
443         .remove         = __devexit_p(adv7180_remove),
444         .id_table       = adv7180_id,
445 };
446
447 static __init int adv7180_init(void)
448 {
449         return i2c_add_driver(&adv7180_driver);
450 }
451
452 static __exit void adv7180_exit(void)
453 {
454         i2c_del_driver(&adv7180_driver);
455 }
456
457 module_init(adv7180_init);
458 module_exit(adv7180_exit);
459
460 MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver");
461 MODULE_AUTHOR("Mocean Laboratories");
462 MODULE_LICENSE("GPL v2");
463