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ASoC: tlv312aic23: unbreak resume
[zen-stable.git] / drivers / media / video / sh_mobile_csi2.c
blob05286500b4d432de590fa206070c2611bcb57a5a
1 /*
2 * Driver for the SH-Mobile MIPI CSI-2 unit
3 *
4 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/delay.h>
12 #include <linux/i2c.h>
13 #include <linux/io.h>
14 #include <linux/platform_device.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/slab.h>
17 #include <linux/videodev2.h>
18 #include <linux/module.h>
19
20 #include <media/sh_mobile_ceu.h>
21 #include <media/sh_mobile_csi2.h>
22 #include <media/soc_camera.h>
23 #include <media/soc_mediabus.h>
24 #include <media/v4l2-common.h>
25 #include <media/v4l2-dev.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-mediabus.h>
28 #include <media/v4l2-subdev.h>
29
30 #define SH_CSI2_TREF 0x00
31 #define SH_CSI2_SRST 0x04
32 #define SH_CSI2_PHYCNT 0x08
33 #define SH_CSI2_CHKSUM 0x0C
34 #define SH_CSI2_VCDT 0x10
35
36 struct sh_csi2 {
37 struct v4l2_subdev subdev;
38 struct list_head list;
39 unsigned int irq;
40 unsigned long mipi_flags;
41 void __iomem *base;
42 struct platform_device *pdev;
43 struct sh_csi2_client_config *client;
44 };
45
46 static int sh_csi2_try_fmt(struct v4l2_subdev *sd,
47 struct v4l2_mbus_framefmt *mf)
48 {
49 struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
50 struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
51
52 if (mf->width > 8188)
53 mf->width = 8188;
54 else if (mf->width & 1)
55 mf->width &= ~1;
56
57 switch (pdata->type) {
58 case SH_CSI2C:
59 switch (mf->code) {
60 case V4L2_MBUS_FMT_UYVY8_2X8: /* YUV422 */
61 case V4L2_MBUS_FMT_YUYV8_1_5X8: /* YUV420 */
62 case V4L2_MBUS_FMT_Y8_1X8: /* RAW8 */
63 case V4L2_MBUS_FMT_SBGGR8_1X8:
64 case V4L2_MBUS_FMT_SGRBG8_1X8:
65 break;
66 default:
67 /* All MIPI CSI-2 devices must support one of primary formats */
68 mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
69 }
70 break;
71 case SH_CSI2I:
72 switch (mf->code) {
73 case V4L2_MBUS_FMT_Y8_1X8: /* RAW8 */
74 case V4L2_MBUS_FMT_SBGGR8_1X8:
75 case V4L2_MBUS_FMT_SGRBG8_1X8:
76 case V4L2_MBUS_FMT_SBGGR10_1X10: /* RAW10 */
77 case V4L2_MBUS_FMT_SBGGR12_1X12: /* RAW12 */
78 break;
79 default:
80 /* All MIPI CSI-2 devices must support one of primary formats */
81 mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
82 }
83 break;
84 }
85
86 return 0;
87 }
88
89 /*
90 * We have done our best in try_fmt to try and tell the sensor, which formats
91 * we support. If now the configuration is unsuitable for us we can only
92 * error out.
93 */
94 static int sh_csi2_s_fmt(struct v4l2_subdev *sd,
95 struct v4l2_mbus_framefmt *mf)
96 {
97 struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
98 u32 tmp = (priv->client->channel & 3) << 8;
99
100 dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
101 if (mf->width > 8188 || mf->width & 1)
102 return -EINVAL;
103
104 switch (mf->code) {
105 case V4L2_MBUS_FMT_UYVY8_2X8:
106 tmp |= 0x1e; /* YUV422 8 bit */
107 break;
108 case V4L2_MBUS_FMT_YUYV8_1_5X8:
109 tmp |= 0x18; /* YUV420 8 bit */
110 break;
111 case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
112 tmp |= 0x21; /* RGB555 */
113 break;
114 case V4L2_MBUS_FMT_RGB565_2X8_BE:
115 tmp |= 0x22; /* RGB565 */
116 break;
117 case V4L2_MBUS_FMT_Y8_1X8:
118 case V4L2_MBUS_FMT_SBGGR8_1X8:
119 case V4L2_MBUS_FMT_SGRBG8_1X8:
120 tmp |= 0x2a; /* RAW8 */
121 break;
122 default:
123 return -EINVAL;
124 }
125
126 iowrite32(tmp, priv->base + SH_CSI2_VCDT);
127
128 return 0;
129 }
130
131 static int sh_csi2_g_mbus_config(struct v4l2_subdev *sd,
132 struct v4l2_mbus_config *cfg)
133 {
134 cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING |
135 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
136 V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH;
137 cfg->type = V4L2_MBUS_PARALLEL;
138
139 return 0;
140 }
141
142 static int sh_csi2_s_mbus_config(struct v4l2_subdev *sd,
143 const struct v4l2_mbus_config *cfg)
144 {
145 struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
146 struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
147 struct v4l2_subdev *client_sd = soc_camera_to_subdev(icd);
148 struct v4l2_mbus_config client_cfg = {.type = V4L2_MBUS_CSI2,
149 .flags = priv->mipi_flags};
150
151 return v4l2_subdev_call(client_sd, video, s_mbus_config, &client_cfg);
152 }
153
154 static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = {
155 .s_mbus_fmt = sh_csi2_s_fmt,
156 .try_mbus_fmt = sh_csi2_try_fmt,
157 .g_mbus_config = sh_csi2_g_mbus_config,
158 .s_mbus_config = sh_csi2_s_mbus_config,
159 };
160
161 static void sh_csi2_hwinit(struct sh_csi2 *priv)
162 {
163 struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
164 __u32 tmp = 0x10; /* Enable MIPI CSI clock lane */
165
166 /* Reflect registers immediately */
167 iowrite32(0x00000001, priv->base + SH_CSI2_TREF);
168 /* reset CSI2 harware */
169 iowrite32(0x00000001, priv->base + SH_CSI2_SRST);
170 udelay(5);
171 iowrite32(0x00000000, priv->base + SH_CSI2_SRST);
172
173 switch (pdata->type) {
174 case SH_CSI2C:
175 if (priv->client->lanes == 1)
176 tmp |= 1;
177 else
178 /* Default - both lanes */
179 tmp |= 3;
180 break;
181 case SH_CSI2I:
182 if (!priv->client->lanes || priv->client->lanes > 4)
183 /* Default - all 4 lanes */
184 tmp |= 0xf;
185 else
186 tmp |= (1 << priv->client->lanes) - 1;
187 }
188
189 if (priv->client->phy == SH_CSI2_PHY_MAIN)
190 tmp |= 0x8000;
191
192 iowrite32(tmp, priv->base + SH_CSI2_PHYCNT);
193
194 tmp = 0;
195 if (pdata->flags & SH_CSI2_ECC)
196 tmp |= 2;
197 if (pdata->flags & SH_CSI2_CRC)
198 tmp |= 1;
199 iowrite32(tmp, priv->base + SH_CSI2_CHKSUM);
200 }
201
202 static int sh_csi2_client_connect(struct sh_csi2 *priv)
203 {
204 struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
205 struct soc_camera_device *icd = v4l2_get_subdev_hostdata(&priv->subdev);
206 struct v4l2_subdev *client_sd = soc_camera_to_subdev(icd);
207 struct device *dev = v4l2_get_subdevdata(&priv->subdev);
208 struct v4l2_mbus_config cfg;
209 unsigned long common_flags, csi2_flags;
210 int i, ret;
211
212 if (priv->client)
213 return -EBUSY;
214
215 for (i = 0; i < pdata->num_clients; i++)
216 if (&pdata->clients[i].pdev->dev == icd->pdev)
217 break;
218
219 dev_dbg(dev, "%s(%p): found #%d\n", __func__, dev, i);
220
221 if (i == pdata->num_clients)
222 return -ENODEV;
223
224 /* Check if we can support this camera */
225 csi2_flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK | V4L2_MBUS_CSI2_1_LANE;
226
227 switch (pdata->type) {
228 case SH_CSI2C:
229 if (pdata->clients[i].lanes != 1)
230 csi2_flags |= V4L2_MBUS_CSI2_2_LANE;
231 break;
232 case SH_CSI2I:
233 switch (pdata->clients[i].lanes) {
234 default:
235 csi2_flags |= V4L2_MBUS_CSI2_4_LANE;
236 case 3:
237 csi2_flags |= V4L2_MBUS_CSI2_3_LANE;
238 case 2:
239 csi2_flags |= V4L2_MBUS_CSI2_2_LANE;
240 }
241 }
242
243 cfg.type = V4L2_MBUS_CSI2;
244 ret = v4l2_subdev_call(client_sd, video, g_mbus_config, &cfg);
245 if (ret == -ENOIOCTLCMD)
246 common_flags = csi2_flags;
247 else if (!ret)
248 common_flags = soc_mbus_config_compatible(&cfg,
249 csi2_flags);
250 else
251 common_flags = 0;
252
253 if (!common_flags)
254 return -EINVAL;
255
256 /* All good: camera MIPI configuration supported */
257 priv->mipi_flags = common_flags;
258 priv->client = pdata->clients + i;
259
260 pm_runtime_get_sync(dev);
261
262 sh_csi2_hwinit(priv);
263
264 return 0;
265 }
266
267 static void sh_csi2_client_disconnect(struct sh_csi2 *priv)
268 {
269 if (!priv->client)
270 return;
271
272 priv->client = NULL;
273
274 pm_runtime_put(v4l2_get_subdevdata(&priv->subdev));
275 }
276
277 static int sh_csi2_s_power(struct v4l2_subdev *sd, int on)
278 {
279 struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
280
281 if (on)
282 return sh_csi2_client_connect(priv);
283
284 sh_csi2_client_disconnect(priv);
285 return 0;
286 }
287
288 static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops = {
289 .s_power = sh_csi2_s_power,
290 };
291
292 static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
293 .core = &sh_csi2_subdev_core_ops,
294 .video = &sh_csi2_subdev_video_ops,
295 };
296
297 static __devinit int sh_csi2_probe(struct platform_device *pdev)
298 {
299 struct resource *res;
300 unsigned int irq;
301 int ret;
302 struct sh_csi2 *priv;
303 /* Platform data specify the PHY, lanes, ECC, CRC */
304 struct sh_csi2_pdata *pdata = pdev->dev.platform_data;
305
306 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
307 /* Interrupt unused so far */
308 irq = platform_get_irq(pdev, 0);
309
310 if (!res || (int)irq <= 0 || !pdata) {
311 dev_err(&pdev->dev, "Not enough CSI2 platform resources.\n");
312 return -ENODEV;
313 }
314
315 /* TODO: Add support for CSI2I. Careful: different register layout! */
316 if (pdata->type != SH_CSI2C) {
317 dev_err(&pdev->dev, "Only CSI2C supported ATM.\n");
318 return -EINVAL;
319 }
320
321 priv = kzalloc(sizeof(struct sh_csi2), GFP_KERNEL);
322 if (!priv)
323 return -ENOMEM;
324
325 priv->irq = irq;
326
327 if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
328 dev_err(&pdev->dev, "CSI2 register region already claimed\n");
329 ret = -EBUSY;
330 goto ereqreg;
331 }
332
333 priv->base = ioremap(res->start, resource_size(res));
334 if (!priv->base) {
335 ret = -ENXIO;
336 dev_err(&pdev->dev, "Unable to ioremap CSI2 registers.\n");
337 goto eremap;
338 }
339
340 priv->pdev = pdev;
341 platform_set_drvdata(pdev, priv);
342
343 v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops);
344 v4l2_set_subdevdata(&priv->subdev, &pdev->dev);
345
346 snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s.mipi-csi",
347 dev_name(pdata->v4l2_dev->dev));
348 ret = v4l2_device_register_subdev(pdata->v4l2_dev, &priv->subdev);
349 dev_dbg(&pdev->dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret);
350 if (ret < 0)
351 goto esdreg;
352
353 pm_runtime_enable(&pdev->dev);
354
355 dev_dbg(&pdev->dev, "CSI2 probed.\n");
356
357 return 0;
358
359 esdreg:
360 iounmap(priv->base);
361 eremap:
362 release_mem_region(res->start, resource_size(res));
363 ereqreg:
364 kfree(priv);
365
366 return ret;
367 }
368
369 static __devexit int sh_csi2_remove(struct platform_device *pdev)
370 {
371 struct sh_csi2 *priv = platform_get_drvdata(pdev);
372 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
373
374 v4l2_device_unregister_subdev(&priv->subdev);
375 pm_runtime_disable(&pdev->dev);
376 iounmap(priv->base);
377 release_mem_region(res->start, resource_size(res));
378 platform_set_drvdata(pdev, NULL);
379 kfree(priv);
380
381 return 0;
382 }
383
384 static struct platform_driver __refdata sh_csi2_pdrv = {
385 .remove = __devexit_p(sh_csi2_remove),
386 .probe = sh_csi2_probe,
387 .driver = {
388 .name = "sh-mobile-csi2",
389 .owner = THIS_MODULE,
390 },
391 };
392
393 module_platform_driver(sh_csi2_pdrv);
394
395 MODULE_DESCRIPTION("SH-Mobile MIPI CSI-2 driver");
396 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
397 MODULE_LICENSE("GPL v2");
398 MODULE_ALIAS("platform:sh-mobile-csi2");