Commit | Line | Data |
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077e2c10 GL |
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> | |
7a707b89 | 18 | #include <linux/module.h> |
077e2c10 | 19 | |
6b526fed | 20 | #include <media/sh_mobile_ceu.h> |
077e2c10 GL |
21 | #include <media/sh_mobile_csi2.h> |
22 | #include <media/soc_camera.h> | |
f836c628 | 23 | #include <media/soc_mediabus.h> |
077e2c10 GL |
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; | |
077e2c10 | 39 | unsigned int irq; |
022e52cf | 40 | unsigned long mipi_flags; |
077e2c10 GL |
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 */ | |
07670433 | 62 | case V4L2_MBUS_FMT_Y8_1X8: /* RAW8 */ |
077e2c10 GL |
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) { | |
07670433 | 73 | case V4L2_MBUS_FMT_Y8_1X8: /* RAW8 */ |
077e2c10 GL |
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; | |
07670433 | 117 | case V4L2_MBUS_FMT_Y8_1X8: |
077e2c10 GL |
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 | ||
022e52cf GL |
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); | |
4c0b036d | 146 | struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd); |
022e52cf GL |
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 | ||
077e2c10 GL |
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, | |
022e52cf GL |
157 | .g_mbus_config = sh_csi2_g_mbus_config, |
158 | .s_mbus_config = sh_csi2_s_mbus_config, | |
077e2c10 GL |
159 | }; |
160 | ||
077e2c10 GL |
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 | ||
f836c628 GL |
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 | } | |
077e2c10 GL |
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 | ||
6b526fed | 202 | static int sh_csi2_client_connect(struct sh_csi2 *priv) |
077e2c10 | 203 | { |
077e2c10 | 204 | struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data; |
4c0b036d | 205 | struct soc_camera_device *icd = v4l2_get_subdev_hostdata(&priv->subdev); |
da83d9dc | 206 | struct v4l2_subdev *client_sd = soc_camera_to_subdev(icd); |
6b526fed | 207 | struct device *dev = v4l2_get_subdevdata(&priv->subdev); |
f836c628 GL |
208 | struct v4l2_mbus_config cfg; |
209 | unsigned long common_flags, csi2_flags; | |
210 | int i, ret; | |
6b526fed | 211 | |
2fbdc9bd GL |
212 | if (priv->client) |
213 | return -EBUSY; | |
214 | ||
077e2c10 GL |
215 | for (i = 0; i < pdata->num_clients; i++) |
216 | if (&pdata->clients[i].pdev->dev == icd->pdev) | |
217 | break; | |
218 | ||
6b526fed | 219 | dev_dbg(dev, "%s(%p): found #%d\n", __func__, dev, i); |
077e2c10 GL |
220 | |
221 | if (i == pdata->num_clients) | |
6b526fed | 222 | return -ENODEV; |
077e2c10 | 223 | |
f836c628 GL |
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; | |
da83d9dc | 244 | ret = v4l2_subdev_call(client_sd, video, g_mbus_config, &cfg); |
f836c628 GL |
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 */ | |
022e52cf | 257 | priv->mipi_flags = common_flags; |
6b526fed | 258 | priv->client = pdata->clients + i; |
077e2c10 | 259 | |
6b526fed | 260 | pm_runtime_get_sync(dev); |
077e2c10 | 261 | |
6b526fed | 262 | sh_csi2_hwinit(priv); |
077e2c10 | 263 | |
6b526fed GL |
264 | return 0; |
265 | } | |
077e2c10 | 266 | |
6b526fed GL |
267 | static void sh_csi2_client_disconnect(struct sh_csi2 *priv) |
268 | { | |
2fbdc9bd GL |
269 | if (!priv->client) |
270 | return; | |
271 | ||
6b526fed | 272 | priv->client = NULL; |
077e2c10 | 273 | |
6b526fed | 274 | pm_runtime_put(v4l2_get_subdevdata(&priv->subdev)); |
077e2c10 GL |
275 | } |
276 | ||
6b526fed GL |
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 | ||
077e2c10 GL |
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; | |
077e2c10 GL |
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; | |
6b526fed | 341 | platform_set_drvdata(pdev, priv); |
077e2c10 GL |
342 | |
343 | v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops); | |
344 | v4l2_set_subdevdata(&priv->subdev, &pdev->dev); | |
345 | ||
6b526fed GL |
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; | |
077e2c10 GL |
352 | |
353 | pm_runtime_enable(&pdev->dev); | |
354 | ||
355 | dev_dbg(&pdev->dev, "CSI2 probed.\n"); | |
356 | ||
357 | return 0; | |
358 | ||
6b526fed GL |
359 | esdreg: |
360 | iounmap(priv->base); | |
077e2c10 GL |
361 | eremap: |
362 | release_mem_region(res->start, resource_size(res)); | |
363 | ereqreg: | |
077e2c10 GL |
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 | ||
6b526fed | 374 | v4l2_device_unregister_subdev(&priv->subdev); |
077e2c10 GL |
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 = { | |
6b526fed GL |
385 | .remove = __devexit_p(sh_csi2_remove), |
386 | .probe = sh_csi2_probe, | |
387 | .driver = { | |
077e2c10 GL |
388 | .name = "sh-mobile-csi2", |
389 | .owner = THIS_MODULE, | |
390 | }, | |
391 | }; | |
392 | ||
1d6629b1 | 393 | module_platform_driver(sh_csi2_pdrv); |
077e2c10 GL |
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"); |