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path: root/drivers/media/video/sh_mobile_csi2.c
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Diffstat (limited to 'drivers/media/video/sh_mobile_csi2.c')
-rw-r--r--drivers/media/video/sh_mobile_csi2.c372
1 files changed, 372 insertions, 0 deletions
diff --git a/drivers/media/video/sh_mobile_csi2.c b/drivers/media/video/sh_mobile_csi2.c
new file mode 100644
index 00000000000..2893a0134c7
--- /dev/null
+++ b/drivers/media/video/sh_mobile_csi2.c
@@ -0,0 +1,372 @@
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
19#include <media/sh_mobile_ceu.h>
20#include <media/sh_mobile_csi2.h>
21#include <media/soc_camera.h>
22#include <media/v4l2-common.h>
23#include <media/v4l2-dev.h>
24#include <media/v4l2-device.h>
25#include <media/v4l2-mediabus.h>
26#include <media/v4l2-subdev.h>
27
28#define SH_CSI2_TREF 0x00
29#define SH_CSI2_SRST 0x04
30#define SH_CSI2_PHYCNT 0x08
31#define SH_CSI2_CHKSUM 0x0C
32#define SH_CSI2_VCDT 0x10
33
34struct sh_csi2 {
35 struct v4l2_subdev subdev;
36 struct list_head list;
37 unsigned int irq;
38 void __iomem *base;
39 struct platform_device *pdev;
40 struct sh_csi2_client_config *client;
41 unsigned long (*query_bus_param)(struct soc_camera_device *);
42 int (*set_bus_param)(struct soc_camera_device *, unsigned long);
43};
44
45static int sh_csi2_try_fmt(struct v4l2_subdev *sd,
46 struct v4l2_mbus_framefmt *mf)
47{
48 struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
49 struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
50
51 if (mf->width > 8188)
52 mf->width = 8188;
53 else if (mf->width & 1)
54 mf->width &= ~1;
55
56 switch (pdata->type) {
57 case SH_CSI2C:
58 switch (mf->code) {
59 case V4L2_MBUS_FMT_UYVY8_2X8: /* YUV422 */
60 case V4L2_MBUS_FMT_YUYV8_1_5X8: /* YUV420 */
61 case V4L2_MBUS_FMT_Y8_1X8: /* RAW8 */
62 case V4L2_MBUS_FMT_SBGGR8_1X8:
63 case V4L2_MBUS_FMT_SGRBG8_1X8:
64 break;
65 default:
66 /* All MIPI CSI-2 devices must support one of primary formats */
67 mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
68 }
69 break;
70 case SH_CSI2I:
71 switch (mf->code) {
72 case V4L2_MBUS_FMT_Y8_1X8: /* RAW8 */
73 case V4L2_MBUS_FMT_SBGGR8_1X8:
74 case V4L2_MBUS_FMT_SGRBG8_1X8:
75 case V4L2_MBUS_FMT_SBGGR10_1X10: /* RAW10 */
76 case V4L2_MBUS_FMT_SBGGR12_1X12: /* RAW12 */
77 break;
78 default:
79 /* All MIPI CSI-2 devices must support one of primary formats */
80 mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
81 }
82 break;
83 }
84
85 return 0;
86}
87
88/*
89 * We have done our best in try_fmt to try and tell the sensor, which formats
90 * we support. If now the configuration is unsuitable for us we can only
91 * error out.
92 */
93static int sh_csi2_s_fmt(struct v4l2_subdev *sd,
94 struct v4l2_mbus_framefmt *mf)
95{
96 struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
97 u32 tmp = (priv->client->channel & 3) << 8;
98
99 dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
100 if (mf->width > 8188 || mf->width & 1)
101 return -EINVAL;
102
103 switch (mf->code) {
104 case V4L2_MBUS_FMT_UYVY8_2X8:
105 tmp |= 0x1e; /* YUV422 8 bit */
106 break;
107 case V4L2_MBUS_FMT_YUYV8_1_5X8:
108 tmp |= 0x18; /* YUV420 8 bit */
109 break;
110 case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
111 tmp |= 0x21; /* RGB555 */
112 break;
113 case V4L2_MBUS_FMT_RGB565_2X8_BE:
114 tmp |= 0x22; /* RGB565 */
115 break;
116 case V4L2_MBUS_FMT_Y8_1X8:
117 case V4L2_MBUS_FMT_SBGGR8_1X8:
118 case V4L2_MBUS_FMT_SGRBG8_1X8:
119 tmp |= 0x2a; /* RAW8 */
120 break;
121 default:
122 return -EINVAL;
123 }
124
125 iowrite32(tmp, priv->base + SH_CSI2_VCDT);
126
127 return 0;
128}
129
130static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = {
131 .s_mbus_fmt = sh_csi2_s_fmt,
132 .try_mbus_fmt = sh_csi2_try_fmt,
133};
134
135static void sh_csi2_hwinit(struct sh_csi2 *priv)
136{
137 struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
138 __u32 tmp = 0x10; /* Enable MIPI CSI clock lane */
139
140 /* Reflect registers immediately */
141 iowrite32(0x00000001, priv->base + SH_CSI2_TREF);
142 /* reset CSI2 harware */
143 iowrite32(0x00000001, priv->base + SH_CSI2_SRST);
144 udelay(5);
145 iowrite32(0x00000000, priv->base + SH_CSI2_SRST);
146
147 if (priv->client->lanes & 3)
148 tmp |= priv->client->lanes & 3;
149 else
150 /* Default - both lanes */
151 tmp |= 3;
152
153 if (priv->client->phy == SH_CSI2_PHY_MAIN)
154 tmp |= 0x8000;
155
156 iowrite32(tmp, priv->base + SH_CSI2_PHYCNT);
157
158 tmp = 0;
159 if (pdata->flags & SH_CSI2_ECC)
160 tmp |= 2;
161 if (pdata->flags & SH_CSI2_CRC)
162 tmp |= 1;
163 iowrite32(tmp, priv->base + SH_CSI2_CHKSUM);
164}
165
166static int sh_csi2_set_bus_param(struct soc_camera_device *icd,
167 unsigned long flags)
168{
169 return 0;
170}
171
172static unsigned long sh_csi2_query_bus_param(struct soc_camera_device *icd)
173{
174 struct soc_camera_link *icl = to_soc_camera_link(icd);
175 const unsigned long flags = SOCAM_PCLK_SAMPLE_RISING |
176 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
177 SOCAM_MASTER | SOCAM_DATAWIDTH_8 | SOCAM_DATA_ACTIVE_HIGH;
178
179 return soc_camera_apply_sensor_flags(icl, flags);
180}
181
182static int sh_csi2_client_connect(struct sh_csi2 *priv)
183{
184 struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
185 struct v4l2_subdev *sd, *csi2_sd = &priv->subdev;
186 struct soc_camera_device *icd = NULL;
187 struct device *dev = v4l2_get_subdevdata(&priv->subdev);
188 int i;
189
190 v4l2_device_for_each_subdev(sd, csi2_sd->v4l2_dev)
191 if (sd->grp_id) {
192 icd = (struct soc_camera_device *)sd->grp_id;
193 break;
194 }
195
196 if (!icd)
197 return -EINVAL;
198
199 for (i = 0; i < pdata->num_clients; i++)
200 if (&pdata->clients[i].pdev->dev == icd->pdev)
201 break;
202
203 dev_dbg(dev, "%s(%p): found #%d\n", __func__, dev, i);
204
205 if (i == pdata->num_clients)
206 return -ENODEV;
207
208 priv->client = pdata->clients + i;
209
210 priv->set_bus_param = icd->ops->set_bus_param;
211 priv->query_bus_param = icd->ops->query_bus_param;
212 icd->ops->set_bus_param = sh_csi2_set_bus_param;
213 icd->ops->query_bus_param = sh_csi2_query_bus_param;
214
215 csi2_sd->grp_id = (long)icd;
216
217 pm_runtime_get_sync(dev);
218
219 sh_csi2_hwinit(priv);
220
221 return 0;
222}
223
224static void sh_csi2_client_disconnect(struct sh_csi2 *priv)
225{
226 struct soc_camera_device *icd = (struct soc_camera_device *)priv->subdev.grp_id;
227
228 priv->client = NULL;
229 priv->subdev.grp_id = 0;
230
231 /* Driver is about to be unbound */
232 icd->ops->set_bus_param = priv->set_bus_param;
233 icd->ops->query_bus_param = priv->query_bus_param;
234 priv->set_bus_param = NULL;
235 priv->query_bus_param = NULL;
236
237 pm_runtime_put(v4l2_get_subdevdata(&priv->subdev));
238}
239
240static int sh_csi2_s_power(struct v4l2_subdev *sd, int on)
241{
242 struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
243
244 if (on)
245 return sh_csi2_client_connect(priv);
246
247 sh_csi2_client_disconnect(priv);
248 return 0;
249}
250
251static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops = {
252 .s_power = sh_csi2_s_power,
253};
254
255static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
256 .core = &sh_csi2_subdev_core_ops,
257 .video = &sh_csi2_subdev_video_ops,
258};
259
260static __devinit int sh_csi2_probe(struct platform_device *pdev)
261{
262 struct resource *res;
263 unsigned int irq;
264 int ret;
265 struct sh_csi2 *priv;
266 /* Platform data specify the PHY, lanes, ECC, CRC */
267 struct sh_csi2_pdata *pdata = pdev->dev.platform_data;
268
269 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
270 /* Interrupt unused so far */
271 irq = platform_get_irq(pdev, 0);
272
273 if (!res || (int)irq <= 0 || !pdata) {
274 dev_err(&pdev->dev, "Not enough CSI2 platform resources.\n");
275 return -ENODEV;
276 }
277
278 /* TODO: Add support for CSI2I. Careful: different register layout! */
279 if (pdata->type != SH_CSI2C) {
280 dev_err(&pdev->dev, "Only CSI2C supported ATM.\n");
281 return -EINVAL;
282 }
283
284 priv = kzalloc(sizeof(struct sh_csi2), GFP_KERNEL);
285 if (!priv)
286 return -ENOMEM;
287
288 priv->irq = irq;
289
290 if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
291 dev_err(&pdev->dev, "CSI2 register region already claimed\n");
292 ret = -EBUSY;
293 goto ereqreg;
294 }
295
296 priv->base = ioremap(res->start, resource_size(res));
297 if (!priv->base) {
298 ret = -ENXIO;
299 dev_err(&pdev->dev, "Unable to ioremap CSI2 registers.\n");
300 goto eremap;
301 }
302
303 priv->pdev = pdev;
304 platform_set_drvdata(pdev, priv);
305
306 v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops);
307 v4l2_set_subdevdata(&priv->subdev, &pdev->dev);
308
309 snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s.mipi-csi",
310 dev_name(pdata->v4l2_dev->dev));
311 ret = v4l2_device_register_subdev(pdata->v4l2_dev, &priv->subdev);
312 dev_dbg(&pdev->dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret);
313 if (ret < 0)
314 goto esdreg;
315
316 pm_runtime_enable(&pdev->dev);
317
318 dev_dbg(&pdev->dev, "CSI2 probed.\n");
319
320 return 0;
321
322esdreg:
323 iounmap(priv->base);
324eremap:
325 release_mem_region(res->start, resource_size(res));
326ereqreg:
327 kfree(priv);
328
329 return ret;
330}
331
332static __devexit int sh_csi2_remove(struct platform_device *pdev)
333{
334 struct sh_csi2 *priv = platform_get_drvdata(pdev);
335 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
336
337 v4l2_device_unregister_subdev(&priv->subdev);
338 pm_runtime_disable(&pdev->dev);
339 iounmap(priv->base);
340 release_mem_region(res->start, resource_size(res));
341 platform_set_drvdata(pdev, NULL);
342 kfree(priv);
343
344 return 0;
345}
346
347static struct platform_driver __refdata sh_csi2_pdrv = {
348 .remove = __devexit_p(sh_csi2_remove),
349 .probe = sh_csi2_probe,
350 .driver = {
351 .name = "sh-mobile-csi2",
352 .owner = THIS_MODULE,
353 },
354};
355
356static int __init sh_csi2_init(void)
357{
358 return platform_driver_register(&sh_csi2_pdrv);
359}
360
361static void __exit sh_csi2_exit(void)
362{
363 platform_driver_unregister(&sh_csi2_pdrv);
364}
365
366module_init(sh_csi2_init);
367module_exit(sh_csi2_exit);
368
369MODULE_DESCRIPTION("SH-Mobile MIPI CSI-2 driver");
370MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
371MODULE_LICENSE("GPL v2");
372MODULE_ALIAS("platform:sh-mobile-csi2");
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-21 10:50:47 -0400