aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/media
diff options
context:
space:
mode:
authorLuca Risolia <luca.risolia@studio.unibo.it>2006-01-10 21:06:59 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-31 20:23:39 -0500
commit7ce08c93e388922e25a96a7d9895784182e4c72c (patch)
treea76883260255bd2d287dd9b5358e56cdddd11158 /drivers/usb/media
parentcd6fcc555fe278263880abdb93352ab205099db9 (diff)
[PATCH] USB: Add ET61X[12]51 Video4Linux2 driver
This patch adds a Video4Linux2 driver giving support to ET61X151 and ET61X251 PC Camera Controllers made by Etoms Electronics. Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/media')
-rw-r--r--drivers/usb/media/Kconfig17
-rw-r--r--drivers/usb/media/Makefile2
-rw-r--r--drivers/usb/media/et61x251.h220
-rw-r--r--drivers/usb/media/et61x251_core.c2605
-rw-r--r--drivers/usb/media/et61x251_sensor.h115
-rw-r--r--drivers/usb/media/et61x251_tas5130d1b.c137
6 files changed, 3094 insertions, 2 deletions
diff --git a/drivers/usb/media/Kconfig b/drivers/usb/media/Kconfig
index 21232ee2974c..0d3d2cc5d7be 100644
--- a/drivers/usb/media/Kconfig
+++ b/drivers/usb/media/Kconfig
@@ -53,6 +53,21 @@ config USB_DSBR
53 To compile this driver as a module, choose M here: the 53 To compile this driver as a module, choose M here: the
54 module will be called dsbr100. 54 module will be called dsbr100.
55 55
56config USB_ET61X251
57 tristate "USB ET61X[12]51 PC Camera Controller support"
58 depends on USB && VIDEO_DEV
59 ---help---
60 Say Y here if you want support for cameras based on Etoms ET61X151
61 or ET61X251 PC Camera Controllers.
62
63 See <file:Documentation/usb/et61x251.txt> for more informations.
64
65 This driver uses the Video For Linux API. You must say Y or M to
66 "Video For Linux" to use this driver.
67
68 To compile this driver as a module, choose M here: the
69 module will be called et61x251.
70
56config USB_IBMCAM 71config USB_IBMCAM
57 tristate "USB IBM (Xirlink) C-it Camera support" 72 tristate "USB IBM (Xirlink) C-it Camera support"
58 depends on USB && VIDEO_DEV 73 depends on USB && VIDEO_DEV
@@ -209,5 +224,3 @@ config USB_PWC
209 224
210 To compile this driver as a module, choose M here: the 225 To compile this driver as a module, choose M here: the
211 module will be called pwc. 226 module will be called pwc.
212
213
diff --git a/drivers/usb/media/Makefile b/drivers/usb/media/Makefile
index d83adffa925f..3957aa1be0f2 100644
--- a/drivers/usb/media/Makefile
+++ b/drivers/usb/media/Makefile
@@ -3,9 +3,11 @@
3# 3#
4 4
5sn9c102-objs := sn9c102_core.o sn9c102_hv7131d.o sn9c102_mi0343.o sn9c102_ov7630.o sn9c102_pas106b.o sn9c102_pas202bcb.o sn9c102_tas5110c1b.o sn9c102_tas5130d1b.o 5sn9c102-objs := sn9c102_core.o sn9c102_hv7131d.o sn9c102_mi0343.o sn9c102_ov7630.o sn9c102_pas106b.o sn9c102_pas202bcb.o sn9c102_tas5110c1b.o sn9c102_tas5130d1b.o
6et61x251-objs := et61x251_core.o et61x251_tas5130d1b.o
6 7
7obj-$(CONFIG_USB_DABUSB) += dabusb.o 8obj-$(CONFIG_USB_DABUSB) += dabusb.o
8obj-$(CONFIG_USB_DSBR) += dsbr100.o 9obj-$(CONFIG_USB_DSBR) += dsbr100.o
10obj-$(CONFIG_USB_ET61X251) += et61x251.o
9obj-$(CONFIG_USB_IBMCAM) += ibmcam.o usbvideo.o ultracam.o 11obj-$(CONFIG_USB_IBMCAM) += ibmcam.o usbvideo.o ultracam.o
10obj-$(CONFIG_USB_KONICAWC) += konicawc.o usbvideo.o 12obj-$(CONFIG_USB_KONICAWC) += konicawc.o usbvideo.o
11obj-$(CONFIG_USB_OV511) += ov511.o 13obj-$(CONFIG_USB_OV511) += ov511.o
diff --git a/drivers/usb/media/et61x251.h b/drivers/usb/media/et61x251.h
new file mode 100644
index 000000000000..652238f329f3
--- /dev/null
+++ b/drivers/usb/media/et61x251.h
@@ -0,0 +1,220 @@
1/***************************************************************************
2 * V4L2 driver for ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
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 as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21#ifndef _ET61X251_H_
22#define _ET61X251_H_
23
24#include <linux/version.h>
25#include <linux/usb.h>
26#include <linux/videodev2.h>
27#include <media/v4l2-common.h>
28#include <linux/device.h>
29#include <linux/list.h>
30#include <linux/spinlock.h>
31#include <linux/time.h>
32#include <linux/wait.h>
33#include <linux/types.h>
34#include <linux/param.h>
35#include <linux/rwsem.h>
36#include <asm/semaphore.h>
37
38#include "et61x251_sensor.h"
39
40/*****************************************************************************/
41
42#define ET61X251_DEBUG
43#define ET61X251_DEBUG_LEVEL 2
44#define ET61X251_MAX_DEVICES 64
45#define ET61X251_PRESERVE_IMGSCALE 0
46#define ET61X251_FORCE_MUNMAP 0
47#define ET61X251_MAX_FRAMES 32
48#define ET61X251_COMPRESSION_QUALITY 0
49#define ET61X251_URBS 2
50#define ET61X251_ISO_PACKETS 7
51#define ET61X251_ALTERNATE_SETTING 13
52#define ET61X251_URB_TIMEOUT msecs_to_jiffies(2 * ET61X251_ISO_PACKETS)
53#define ET61X251_CTRL_TIMEOUT 100
54
55/*****************************************************************************/
56
57static const struct usb_device_id et61x251_id_table[] = {
58 { USB_DEVICE(0x102c, 0x6151), },
59 { USB_DEVICE(0x102c, 0x6251), },
60 { USB_DEVICE(0x102c, 0x6253), },
61 { USB_DEVICE(0x102c, 0x6254), },
62 { USB_DEVICE(0x102c, 0x6255), },
63 { USB_DEVICE(0x102c, 0x6256), },
64 { USB_DEVICE(0x102c, 0x6257), },
65 { USB_DEVICE(0x102c, 0x6258), },
66 { USB_DEVICE(0x102c, 0x6259), },
67 { USB_DEVICE(0x102c, 0x625a), },
68 { USB_DEVICE(0x102c, 0x625b), },
69 { USB_DEVICE(0x102c, 0x625c), },
70 { USB_DEVICE(0x102c, 0x625d), },
71 { USB_DEVICE(0x102c, 0x625e), },
72 { USB_DEVICE(0x102c, 0x625f), },
73 { USB_DEVICE(0x102c, 0x6260), },
74 { USB_DEVICE(0x102c, 0x6261), },
75 { USB_DEVICE(0x102c, 0x6262), },
76 { USB_DEVICE(0x102c, 0x6263), },
77 { USB_DEVICE(0x102c, 0x6264), },
78 { USB_DEVICE(0x102c, 0x6265), },
79 { USB_DEVICE(0x102c, 0x6266), },
80 { USB_DEVICE(0x102c, 0x6267), },
81 { USB_DEVICE(0x102c, 0x6268), },
82 { USB_DEVICE(0x102c, 0x6269), },
83 { }
84};
85
86ET61X251_SENSOR_TABLE
87
88/*****************************************************************************/
89
90enum et61x251_frame_state {
91 F_UNUSED,
92 F_QUEUED,
93 F_GRABBING,
94 F_DONE,
95 F_ERROR,
96};
97
98struct et61x251_frame_t {
99 void* bufmem;
100 struct v4l2_buffer buf;
101 enum et61x251_frame_state state;
102 struct list_head frame;
103 unsigned long vma_use_count;
104};
105
106enum et61x251_dev_state {
107 DEV_INITIALIZED = 0x01,
108 DEV_DISCONNECTED = 0x02,
109 DEV_MISCONFIGURED = 0x04,
110};
111
112enum et61x251_io_method {
113 IO_NONE,
114 IO_READ,
115 IO_MMAP,
116};
117
118enum et61x251_stream_state {
119 STREAM_OFF,
120 STREAM_INTERRUPT,
121 STREAM_ON,
122};
123
124struct et61x251_sysfs_attr {
125 u8 reg, i2c_reg;
126};
127
128struct et61x251_module_param {
129 u8 force_munmap;
130};
131
132static DECLARE_MUTEX(et61x251_sysfs_lock);
133static DECLARE_RWSEM(et61x251_disconnect);
134
135struct et61x251_device {
136 struct video_device* v4ldev;
137
138 struct et61x251_sensor* sensor;
139
140 struct usb_device* usbdev;
141 struct urb* urb[ET61X251_URBS];
142 void* transfer_buffer[ET61X251_URBS];
143 u8* control_buffer;
144
145 struct et61x251_frame_t *frame_current, frame[ET61X251_MAX_FRAMES];
146 struct list_head inqueue, outqueue;
147 u32 frame_count, nbuffers, nreadbuffers;
148
149 enum et61x251_io_method io;
150 enum et61x251_stream_state stream;
151
152 struct v4l2_jpegcompression compression;
153
154 struct et61x251_sysfs_attr sysfs;
155 struct et61x251_module_param module_param;
156
157 enum et61x251_dev_state state;
158 u8 users;
159
160 struct semaphore dev_sem, fileop_sem;
161 spinlock_t queue_lock;
162 wait_queue_head_t open, wait_frame, wait_stream;
163};
164
165/*****************************************************************************/
166
167void
168et61x251_attach_sensor(struct et61x251_device* cam,
169 struct et61x251_sensor* sensor)
170{
171 cam->sensor = sensor;
172 cam->sensor->usbdev = cam->usbdev;
173}
174
175/*****************************************************************************/
176
177#undef DBG
178#undef KDBG
179#ifdef ET61X251_DEBUG
180# define DBG(level, fmt, args...) \
181do { \
182 if (debug >= (level)) { \
183 if ((level) == 1) \
184 dev_err(&cam->usbdev->dev, fmt "\n", ## args); \
185 else if ((level) == 2) \
186 dev_info(&cam->usbdev->dev, fmt "\n", ## args); \
187 else if ((level) >= 3) \
188 dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n", \
189 __FUNCTION__, __LINE__ , ## args); \
190 } \
191} while (0)
192# define KDBG(level, fmt, args...) \
193do { \
194 if (debug >= (level)) { \
195 if ((level) == 1 || (level) == 2) \
196 pr_info("et61x251: " fmt "\n", ## args); \
197 else if ((level) == 3) \
198 pr_debug("et61x251: [%s:%d] " fmt "\n", __FUNCTION__, \
199 __LINE__ , ## args); \
200 } \
201} while (0)
202# define V4LDBG(level, name, cmd) \
203do { \
204 if (debug >= (level)) \
205 v4l_print_ioctl(name, cmd); \
206} while (0)
207#else
208# define DBG(level, fmt, args...) do {;} while(0)
209# define KDBG(level, fmt, args...) do {;} while(0)
210# define V4LDBG(level, name, cmd) do {;} while(0)
211#endif
212
213#undef PDBG
214#define PDBG(fmt, args...) \
215dev_info(&cam->dev, "[%s:%d] " fmt "\n", __FUNCTION__, __LINE__ , ## args)
216
217#undef PDBGG
218#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
219
220#endif /* _ET61X251_H_ */
diff --git a/drivers/usb/media/et61x251_core.c b/drivers/usb/media/et61x251_core.c
new file mode 100644
index 000000000000..2c0171a5ad62
--- /dev/null
+++ b/drivers/usb/media/et61x251_core.c
@@ -0,0 +1,2605 @@
1/***************************************************************************
2 * V4L2 driver for ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
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 as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/param.h>
25#include <linux/moduleparam.h>
26#include <linux/errno.h>
27#include <linux/slab.h>
28#include <linux/string.h>
29#include <linux/device.h>
30#include <linux/fs.h>
31#include <linux/delay.h>
32#include <linux/stddef.h>
33#include <linux/compiler.h>
34#include <linux/ioctl.h>
35#include <linux/poll.h>
36#include <linux/stat.h>
37#include <linux/mm.h>
38#include <linux/vmalloc.h>
39#include <linux/page-flags.h>
40#include <linux/byteorder/generic.h>
41#include <asm/page.h>
42#include <asm/uaccess.h>
43
44#include "et61x251.h"
45
46/*****************************************************************************/
47
48#define ET61X251_MODULE_NAME "V4L2 driver for ET61X[12]51 " \
49 "PC Camera Controllers"
50#define ET61X251_MODULE_AUTHOR "(C) 2006 Luca Risolia"
51#define ET61X251_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
52#define ET61X251_MODULE_LICENSE "GPL"
53#define ET61X251_MODULE_VERSION "1:1.01"
54#define ET61X251_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 1)
55
56/*****************************************************************************/
57
58MODULE_DEVICE_TABLE(usb, et61x251_id_table);
59
60MODULE_AUTHOR(ET61X251_MODULE_AUTHOR " " ET61X251_AUTHOR_EMAIL);
61MODULE_DESCRIPTION(ET61X251_MODULE_NAME);
62MODULE_VERSION(ET61X251_MODULE_VERSION);
63MODULE_LICENSE(ET61X251_MODULE_LICENSE);
64
65static short video_nr[] = {[0 ... ET61X251_MAX_DEVICES-1] = -1};
66module_param_array(video_nr, short, NULL, 0444);
67MODULE_PARM_DESC(video_nr,
68 "\n<-1|n[,...]> Specify V4L2 minor mode number."
69 "\n -1 = use next available (default)"
70 "\n n = use minor number n (integer >= 0)"
71 "\nYou can specify up to "
72 __MODULE_STRING(ET61X251_MAX_DEVICES) " cameras this way."
73 "\nFor example:"
74 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
75 "\nthe second registered camera and use auto for the first"
76 "\none and for every other camera."
77 "\n");
78
79static short force_munmap[] = {[0 ... ET61X251_MAX_DEVICES-1] =
80 ET61X251_FORCE_MUNMAP};
81module_param_array(force_munmap, bool, NULL, 0444);
82MODULE_PARM_DESC(force_munmap,
83 "\n<0|1[,...]> Force the application to unmap previously"
84 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
85 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
86 "\nthis feature. This parameter is specific for each"
87 "\ndetected camera."
88 "\n 0 = do not force memory unmapping"
89 "\n 1 = force memory unmapping (save memory)"
90 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
91 "\n");
92
93#ifdef ET61X251_DEBUG
94static unsigned short debug = ET61X251_DEBUG_LEVEL;
95module_param(debug, ushort, 0644);
96MODULE_PARM_DESC(debug,
97 "\n<n> Debugging information level, from 0 to 3:"
98 "\n0 = none (use carefully)"
99 "\n1 = critical errors"
100 "\n2 = significant informations"
101 "\n3 = more verbose messages"
102 "\nLevel 3 is useful for testing only, when only "
103 "one device is used."
104 "\nDefault value is "__MODULE_STRING(ET61X251_DEBUG_LEVEL)"."
105 "\n");
106#endif
107
108/*****************************************************************************/
109
110static u32
111et61x251_request_buffers(struct et61x251_device* cam, u32 count,
112 enum et61x251_io_method io)
113{
114 struct v4l2_pix_format* p = &(cam->sensor->pix_format);
115 struct v4l2_rect* r = &(cam->sensor->cropcap.bounds);
116 const size_t imagesize = cam->module_param.force_munmap ||
117 io == IO_READ ?
118 (p->width * p->height * p->priv) / 8 :
119 (r->width * r->height * p->priv) / 8;
120 void* buff = NULL;
121 u32 i;
122
123 if (count > ET61X251_MAX_FRAMES)
124 count = ET61X251_MAX_FRAMES;
125
126 cam->nbuffers = count;
127 while (cam->nbuffers > 0) {
128 if ((buff = vmalloc_32(cam->nbuffers * PAGE_ALIGN(imagesize))))
129 break;
130 cam->nbuffers--;
131 }
132
133 for (i = 0; i < cam->nbuffers; i++) {
134 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
135 cam->frame[i].buf.index = i;
136 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
137 cam->frame[i].buf.length = imagesize;
138 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
139 cam->frame[i].buf.sequence = 0;
140 cam->frame[i].buf.field = V4L2_FIELD_NONE;
141 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
142 cam->frame[i].buf.flags = 0;
143 }
144
145 return cam->nbuffers;
146}
147
148
149static void et61x251_release_buffers(struct et61x251_device* cam)
150{
151 if (cam->nbuffers) {
152 vfree(cam->frame[0].bufmem);
153 cam->nbuffers = 0;
154 }
155 cam->frame_current = NULL;
156}
157
158
159static void et61x251_empty_framequeues(struct et61x251_device* cam)
160{
161 u32 i;
162
163 INIT_LIST_HEAD(&cam->inqueue);
164 INIT_LIST_HEAD(&cam->outqueue);
165
166 for (i = 0; i < ET61X251_MAX_FRAMES; i++) {
167 cam->frame[i].state = F_UNUSED;
168 cam->frame[i].buf.bytesused = 0;
169 }
170}
171
172
173static void et61x251_requeue_outqueue(struct et61x251_device* cam)
174{
175 struct et61x251_frame_t *i;
176
177 list_for_each_entry(i, &cam->outqueue, frame) {
178 i->state = F_QUEUED;
179 list_add(&i->frame, &cam->inqueue);
180 }
181
182 INIT_LIST_HEAD(&cam->outqueue);
183}
184
185
186static void et61x251_queue_unusedframes(struct et61x251_device* cam)
187{
188 unsigned long lock_flags;
189 u32 i;
190
191 for (i = 0; i < cam->nbuffers; i++)
192 if (cam->frame[i].state == F_UNUSED) {
193 cam->frame[i].state = F_QUEUED;
194 spin_lock_irqsave(&cam->queue_lock, lock_flags);
195 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
196 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
197 }
198}
199
200/*****************************************************************************/
201
202int et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
203{
204 struct usb_device* udev = cam->usbdev;
205 u8* buff = cam->control_buffer;
206 int res;
207
208 *buff = value;
209
210 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
211 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
212 if (res < 0) {
213 DBG(3, "Failed to write a register (value 0x%02X, index "
214 "0x%02X, error %d)", value, index, res);
215 return -1;
216 }
217
218 return 0;
219}
220
221
222int et61x251_read_reg(struct et61x251_device* cam, u16 index)
223{
224 struct usb_device* udev = cam->usbdev;
225 u8* buff = cam->control_buffer;
226 int res;
227
228 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
229 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
230 if (res < 0)
231 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
232 index, res);
233
234 return (res >= 0) ? (int)(*buff) : -1;
235}
236
237
238static int
239et61x251_i2c_wait(struct et61x251_device* cam, struct et61x251_sensor* sensor)
240{
241 int i, r;
242
243 for (i = 1; i <= 8; i++) {
244 if (sensor->interface == ET61X251_I2C_3WIRES) {
245 r = et61x251_read_reg(cam, 0x8e);
246 if (!(r & 0x02) && (r >= 0))
247 return 0;
248 } else {
249 r = et61x251_read_reg(cam, 0x8b);
250 if (!(r & 0x01) && (r >= 0))
251 return 0;
252 }
253 if (r < 0)
254 return -EIO;
255 udelay(8*8); /* minimum for sensors at 400kHz */
256 }
257
258 return -EBUSY;
259}
260
261
262int
263et61x251_i2c_try_read(struct et61x251_device* cam,
264 struct et61x251_sensor* sensor, u8 address)
265{
266 struct usb_device* udev = cam->usbdev;
267 u8* data = cam->control_buffer;
268 int err = 0, res;
269
270 data[0] = address;
271 data[1] = cam->sensor->i2c_slave_id;
272 data[2] = cam->sensor->rsta | 0x10;
273 data[3] = !(et61x251_read_reg(cam, 0x8b) & 0x02);
274 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
275 0, 0x88, data, 4, ET61X251_CTRL_TIMEOUT);
276 if (res < 0)
277 err += res;
278
279 err += et61x251_i2c_wait(cam, sensor);
280
281 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
282 0, 0x80, data, 8, ET61X251_CTRL_TIMEOUT);
283 if (res < 0)
284 err += res;
285
286 if (err)
287 DBG(3, "I2C read failed for %s image sensor", sensor->name);
288
289 PDBGG("I2C read: address 0x%02X, value: 0x%02X", address, data[0]);
290
291 return err ? -1 : (int)data[0];
292}
293
294
295int
296et61x251_i2c_try_write(struct et61x251_device* cam,
297 struct et61x251_sensor* sensor, u8 address, u8 value)
298{
299 struct usb_device* udev = cam->usbdev;
300 u8* data = cam->control_buffer;
301 int err = 0, res;
302
303 data[0] = address;
304 data[1] = cam->sensor->i2c_slave_id;
305 data[2] = cam->sensor->rsta | 0x12;
306 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
307 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
308 if (res < 0)
309 err += res;
310
311 data[0] = value;
312 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
313 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
314 if (res < 0)
315 err += res;
316
317 err += et61x251_i2c_wait(cam, sensor);
318
319 if (err)
320 DBG(3, "I2C write failed for %s image sensor", sensor->name);
321
322 PDBGG("I2C write: address 0x%02X, value: 0x%02X", address, value);
323
324 return err ? -1 : 0;
325}
326
327
328int
329et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
330 u8 data3, u8 data4, u8 data5, u8 data6, u8 data7,
331 u8 data8, u8 address)
332{
333 struct usb_device* udev = cam->usbdev;
334 u8* data = cam->control_buffer;
335 int err = 0, res;
336
337 if (!cam->sensor)
338 return -1;
339
340 data[0] = data2;
341 data[1] = data3;
342 data[2] = data4;
343 data[3] = data5;
344 data[4] = data6;
345 data[5] = data7;
346 data[6] = data8;
347 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
348 0, 0x81, data, n-1, ET61X251_CTRL_TIMEOUT);
349 if (res < 0)
350 err += res;
351
352 data[0] = address;
353 data[1] = cam->sensor->i2c_slave_id;
354 data[2] = cam->sensor->rsta | 0x02 | (n << 4);
355 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
356 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
357 if (res < 0)
358 err += res;
359
360 /* Start writing through the serial interface */
361 data[0] = data1;
362 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
363 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
364 if (res < 0)
365 err += res;
366
367 err += et61x251_i2c_wait(cam, cam->sensor);
368
369 if (err)
370 DBG(3, "I2C raw write failed for %s image sensor",
371 cam->sensor->name);
372
373 PDBGG("I2C raw write: %u bytes, address = 0x%02X, data1 = 0x%02X, "
374 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X,"
375 " data6 = 0x%02X, data7 = 0x%02X, data8 = 0x%02X", n, address,
376 data1, data2, data3, data4, data5, data6, data7, data8);
377
378 return err ? -1 : 0;
379
380}
381
382
383int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
384{
385 if (!cam->sensor)
386 return -1;
387
388 return et61x251_i2c_try_read(cam, cam->sensor, address);
389}
390
391
392int et61x251_i2c_write(struct et61x251_device* cam, u8 address, u8 value)
393{
394 if (!cam->sensor)
395 return -1;
396
397 return et61x251_i2c_try_write(cam, cam->sensor, address, value);
398}
399
400/*****************************************************************************/
401
402static void et61x251_urb_complete(struct urb *urb, struct pt_regs* regs)
403{
404 struct et61x251_device* cam = urb->context;
405 struct et61x251_frame_t** f;
406 size_t imagesize;
407 u8 i;
408 int err = 0;
409
410 if (urb->status == -ENOENT)
411 return;
412
413 f = &cam->frame_current;
414
415 if (cam->stream == STREAM_INTERRUPT) {
416 cam->stream = STREAM_OFF;
417 if ((*f))
418 (*f)->state = F_QUEUED;
419 DBG(3, "Stream interrupted");
420 wake_up_interruptible(&cam->wait_stream);
421 }
422
423 if (cam->state & DEV_DISCONNECTED)
424 return;
425
426 if (cam->state & DEV_MISCONFIGURED) {
427 wake_up_interruptible(&cam->wait_frame);
428 return;
429 }
430
431 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
432 goto resubmit_urb;
433
434 if (!(*f))
435 (*f) = list_entry(cam->inqueue.next, struct et61x251_frame_t,
436 frame);
437
438 imagesize = (cam->sensor->pix_format.width *
439 cam->sensor->pix_format.height *
440 cam->sensor->pix_format.priv) / 8;
441
442 for (i = 0; i < urb->number_of_packets; i++) {
443 unsigned int len, status;
444 void *pos;
445 u8* b1, * b2, sof;
446 const u8 VOID_BYTES = 6;
447 size_t imglen;
448
449 len = urb->iso_frame_desc[i].actual_length;
450 status = urb->iso_frame_desc[i].status;
451 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
452
453 if (status) {
454 DBG(3, "Error in isochronous frame");
455 (*f)->state = F_ERROR;
456 continue;
457 }
458
459 b1 = pos++;
460 b2 = pos++;
461 sof = ((*b1 & 0x3f) == 63);
462 imglen = ((*b1 & 0xc0) << 2) | *b2;
463
464 PDBGG("Isochrnous frame: length %u, #%u i, image length %zu",
465 len, i, imglen);
466
467 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
468start_of_frame:
469 if (sof) {
470 (*f)->state = F_GRABBING;
471 (*f)->buf.bytesused = 0;
472 do_gettimeofday(&(*f)->buf.timestamp);
473 pos += 22;
474 DBG(3, "SOF detected: new video frame");
475 }
476
477 if ((*f)->state == F_GRABBING) {
478 if (sof && (*f)->buf.bytesused) {
479 if (cam->sensor->pix_format.pixelformat ==
480 V4L2_PIX_FMT_ET61X251)
481 goto end_of_frame;
482 else {
483 DBG(3, "Not expected SOF detected "
484 "after %lu bytes",
485 (unsigned long)(*f)->buf.bytesused);
486 (*f)->state = F_ERROR;
487 continue;
488 }
489 }
490
491 if ((*f)->buf.bytesused + imglen > imagesize) {
492 DBG(3, "Video frame size exceeded");
493 (*f)->state = F_ERROR;
494 continue;
495 }
496
497 pos += VOID_BYTES;
498
499 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, imglen);
500 (*f)->buf.bytesused += imglen;
501
502 if ((*f)->buf.bytesused == imagesize) {
503 u32 b;
504end_of_frame:
505 b = (*f)->buf.bytesused;
506 (*f)->state = F_DONE;
507 (*f)->buf.sequence= ++cam->frame_count;
508 spin_lock(&cam->queue_lock);
509 list_move_tail(&(*f)->frame, &cam->outqueue);
510 if (!list_empty(&cam->inqueue))
511 (*f) = list_entry(cam->inqueue.next,
512 struct et61x251_frame_t,
513 frame);
514 else
515 (*f) = NULL;
516 spin_unlock(&cam->queue_lock);
517 DBG(3, "Video frame captured: : %lu bytes",
518 (unsigned long)(b));
519
520 if (!(*f))
521 goto resubmit_urb;
522
523 if (sof &&
524 cam->sensor->pix_format.pixelformat ==
525 V4L2_PIX_FMT_ET61X251)
526 goto start_of_frame;
527 }
528 }
529 }
530
531resubmit_urb:
532 urb->dev = cam->usbdev;
533 err = usb_submit_urb(urb, GFP_ATOMIC);
534 if (err < 0 && err != -EPERM) {
535 cam->state |= DEV_MISCONFIGURED;
536 DBG(1, "usb_submit_urb() failed");
537 }
538
539 wake_up_interruptible(&cam->wait_frame);
540}
541
542
543static int et61x251_start_transfer(struct et61x251_device* cam)
544{
545 struct usb_device *udev = cam->usbdev;
546 struct urb* urb;
547 const unsigned int wMaxPacketSize[] = {0, 256, 384, 512, 640, 768, 832,
548 864, 896, 920, 956, 980, 1000,
549 1022};
550 const unsigned int psz = wMaxPacketSize[ET61X251_ALTERNATE_SETTING];
551 s8 i, j;
552 int err = 0;
553
554 for (i = 0; i < ET61X251_URBS; i++) {
555 cam->transfer_buffer[i] = kzalloc(ET61X251_ISO_PACKETS * psz,
556 GFP_KERNEL);
557 if (!cam->transfer_buffer[i]) {
558 err = -ENOMEM;
559 DBG(1, "Not enough memory");
560 goto free_buffers;
561 }
562 }
563
564 for (i = 0; i < ET61X251_URBS; i++) {
565 urb = usb_alloc_urb(ET61X251_ISO_PACKETS, GFP_KERNEL);
566 cam->urb[i] = urb;
567 if (!urb) {
568 err = -ENOMEM;
569 DBG(1, "usb_alloc_urb() failed");
570 goto free_urbs;
571 }
572 urb->dev = udev;
573 urb->context = cam;
574 urb->pipe = usb_rcvisocpipe(udev, 1);
575 urb->transfer_flags = URB_ISO_ASAP;
576 urb->number_of_packets = ET61X251_ISO_PACKETS;
577 urb->complete = et61x251_urb_complete;
578 urb->transfer_buffer = cam->transfer_buffer[i];
579 urb->transfer_buffer_length = psz * ET61X251_ISO_PACKETS;
580 urb->interval = 1;
581 for (j = 0; j < ET61X251_ISO_PACKETS; j++) {
582 urb->iso_frame_desc[j].offset = psz * j;
583 urb->iso_frame_desc[j].length = psz;
584 }
585 }
586
587 err = et61x251_write_reg(cam, 0x01, 0x03);
588 err = et61x251_write_reg(cam, 0x00, 0x03);
589 err = et61x251_write_reg(cam, 0x08, 0x03);
590 if (err) {
591 err = -EIO;
592 DBG(1, "I/O hardware error");
593 goto free_urbs;
594 }
595
596 err = usb_set_interface(udev, 0, ET61X251_ALTERNATE_SETTING);
597 if (err) {
598 DBG(1, "usb_set_interface() failed");
599 goto free_urbs;
600 }
601
602 cam->frame_current = NULL;
603
604 for (i = 0; i < ET61X251_URBS; i++) {
605 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
606 if (err) {
607 for (j = i-1; j >= 0; j--)
608 usb_kill_urb(cam->urb[j]);
609 DBG(1, "usb_submit_urb() failed, error %d", err);
610 goto free_urbs;
611 }
612 }
613
614 return 0;
615
616free_urbs:
617 for (i = 0; (i < ET61X251_URBS) && cam->urb[i]; i++)
618 usb_free_urb(cam->urb[i]);
619
620free_buffers:
621 for (i = 0; (i < ET61X251_URBS) && cam->transfer_buffer[i]; i++)
622 kfree(cam->transfer_buffer[i]);
623
624 return err;
625}
626
627
628static int et61x251_stop_transfer(struct et61x251_device* cam)
629{
630 struct usb_device *udev = cam->usbdev;
631 s8 i;
632 int err = 0;
633
634 if (cam->state & DEV_DISCONNECTED)
635 return 0;
636
637 for (i = ET61X251_URBS-1; i >= 0; i--) {
638 usb_kill_urb(cam->urb[i]);
639 usb_free_urb(cam->urb[i]);
640 kfree(cam->transfer_buffer[i]);
641 }
642
643 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
644 if (err)
645 DBG(3, "usb_set_interface() failed");
646
647 return err;
648}
649
650
651static int et61x251_stream_interrupt(struct et61x251_device* cam)
652{
653 int err = 0;
654
655 cam->stream = STREAM_INTERRUPT;
656 err = wait_event_timeout(cam->wait_stream,
657 (cam->stream == STREAM_OFF) ||
658 (cam->state & DEV_DISCONNECTED),
659 ET61X251_URB_TIMEOUT);
660 if (cam->state & DEV_DISCONNECTED)
661 return -ENODEV;
662 else if (err) {
663 cam->state |= DEV_MISCONFIGURED;
664 DBG(1, "URB timeout reached. The camera is misconfigured. To "
665 "use it, close and open /dev/video%d again.",
666 cam->v4ldev->minor);
667 return err;
668 }
669
670 return 0;
671}
672
673/*****************************************************************************/
674
675#ifdef CONFIG_VIDEO_ADV_DEBUG
676static u8 et61x251_strtou8(const char* buff, size_t len, ssize_t* count)
677{
678 char str[5];
679 char* endp;
680 unsigned long val;
681
682 if (len < 4) {
683 strncpy(str, buff, len);
684 str[len+1] = '\0';
685 } else {
686 strncpy(str, buff, 4);
687 str[4] = '\0';
688 }
689
690 val = simple_strtoul(str, &endp, 0);
691
692 *count = 0;
693 if (val <= 0xff)
694 *count = (ssize_t)(endp - str);
695 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
696 *count += 1;
697
698 return (u8)val;
699}
700
701/*
702 NOTE 1: being inside one of the following methods implies that the v4l
703 device exists for sure (see kobjects and reference counters)
704 NOTE 2: buffers are PAGE_SIZE long
705*/
706
707static ssize_t et61x251_show_reg(struct class_device* cd, char* buf)
708{
709 struct et61x251_device* cam;
710 ssize_t count;
711
712 if (down_interruptible(&et61x251_sysfs_lock))
713 return -ERESTARTSYS;
714
715 cam = video_get_drvdata(to_video_device(cd));
716 if (!cam) {
717 up(&et61x251_sysfs_lock);
718 return -ENODEV;
719 }
720
721 count = sprintf(buf, "%u\n", cam->sysfs.reg);
722
723 up(&et61x251_sysfs_lock);
724
725 return count;
726}
727
728
729static ssize_t
730et61x251_store_reg(struct class_device* cd, const char* buf, size_t len)
731{
732 struct et61x251_device* cam;
733 u8 index;
734 ssize_t count;
735
736 if (down_interruptible(&et61x251_sysfs_lock))
737 return -ERESTARTSYS;
738
739 cam = video_get_drvdata(to_video_device(cd));
740 if (!cam) {
741 up(&et61x251_sysfs_lock);
742 return -ENODEV;
743 }
744
745 index = et61x251_strtou8(buf, len, &count);
746 if (index > 0x8e || !count) {
747 up(&et61x251_sysfs_lock);
748 return -EINVAL;
749 }
750
751 cam->sysfs.reg = index;
752
753 DBG(2, "Moved ET61X[12]51 register index to 0x%02X", cam->sysfs.reg);
754 DBG(3, "Written bytes: %zd", count);
755
756 up(&et61x251_sysfs_lock);
757
758 return count;
759}
760
761
762static ssize_t et61x251_show_val(struct class_device* cd, char* buf)
763{
764 struct et61x251_device* cam;
765 ssize_t count;
766 int val;
767
768 if (down_interruptible(&et61x251_sysfs_lock))
769 return -ERESTARTSYS;
770
771 cam = video_get_drvdata(to_video_device(cd));
772 if (!cam) {
773 up(&et61x251_sysfs_lock);
774 return -ENODEV;
775 }
776
777 if ((val = et61x251_read_reg(cam, cam->sysfs.reg)) < 0) {
778 up(&et61x251_sysfs_lock);
779 return -EIO;
780 }
781
782 count = sprintf(buf, "%d\n", val);
783
784 DBG(3, "Read bytes: %zd", count);
785
786 up(&et61x251_sysfs_lock);
787
788 return count;
789}
790
791
792static ssize_t
793et61x251_store_val(struct class_device* cd, const char* buf, size_t len)
794{
795 struct et61x251_device* cam;
796 u8 value;
797 ssize_t count;
798 int err;
799
800 if (down_interruptible(&et61x251_sysfs_lock))
801 return -ERESTARTSYS;
802
803 cam = video_get_drvdata(to_video_device(cd));
804 if (!cam) {
805 up(&et61x251_sysfs_lock);
806 return -ENODEV;
807 }
808
809 value = et61x251_strtou8(buf, len, &count);
810 if (!count) {
811 up(&et61x251_sysfs_lock);
812 return -EINVAL;
813 }
814
815 err = et61x251_write_reg(cam, value, cam->sysfs.reg);
816 if (err) {
817 up(&et61x251_sysfs_lock);
818 return -EIO;
819 }
820
821 DBG(2, "Written ET61X[12]51 reg. 0x%02X, val. 0x%02X",
822 cam->sysfs.reg, value);
823 DBG(3, "Written bytes: %zd", count);
824
825 up(&et61x251_sysfs_lock);
826
827 return count;
828}
829
830
831static ssize_t et61x251_show_i2c_reg(struct class_device* cd, char* buf)
832{
833 struct et61x251_device* cam;
834 ssize_t count;
835
836 if (down_interruptible(&et61x251_sysfs_lock))
837 return -ERESTARTSYS;
838
839 cam = video_get_drvdata(to_video_device(cd));
840 if (!cam) {
841 up(&et61x251_sysfs_lock);
842 return -ENODEV;
843 }
844
845 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
846
847 DBG(3, "Read bytes: %zd", count);
848
849 up(&et61x251_sysfs_lock);
850
851 return count;
852}
853
854
855static ssize_t
856et61x251_store_i2c_reg(struct class_device* cd, const char* buf, size_t len)
857{
858 struct et61x251_device* cam;
859 u8 index;
860 ssize_t count;
861
862 if (down_interruptible(&et61x251_sysfs_lock))
863 return -ERESTARTSYS;
864
865 cam = video_get_drvdata(to_video_device(cd));
866 if (!cam) {
867 up(&et61x251_sysfs_lock);
868 return -ENODEV;
869 }
870
871 index = et61x251_strtou8(buf, len, &count);
872 if (!count) {
873 up(&et61x251_sysfs_lock);
874 return -EINVAL;
875 }
876
877 cam->sysfs.i2c_reg = index;
878
879 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
880 DBG(3, "Written bytes: %zd", count);
881
882 up(&et61x251_sysfs_lock);
883
884 return count;
885}
886
887
888static ssize_t et61x251_show_i2c_val(struct class_device* cd, char* buf)
889{
890 struct et61x251_device* cam;
891 ssize_t count;
892 int val;
893
894 if (down_interruptible(&et61x251_sysfs_lock))
895 return -ERESTARTSYS;
896
897 cam = video_get_drvdata(to_video_device(cd));
898 if (!cam) {
899 up(&et61x251_sysfs_lock);
900 return -ENODEV;
901 }
902
903 if (!(cam->sensor->sysfs_ops & ET61X251_I2C_READ)) {
904 up(&et61x251_sysfs_lock);
905 return -ENOSYS;
906 }
907
908 if ((val = et61x251_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
909 up(&et61x251_sysfs_lock);
910 return -EIO;
911 }
912
913 count = sprintf(buf, "%d\n", val);
914
915 DBG(3, "Read bytes: %zd", count);
916
917 up(&et61x251_sysfs_lock);
918
919 return count;
920}
921
922
923static ssize_t
924et61x251_store_i2c_val(struct class_device* cd, const char* buf, size_t len)
925{
926 struct et61x251_device* cam;
927 u8 value;
928 ssize_t count;
929 int err;
930
931 if (down_interruptible(&et61x251_sysfs_lock))
932 return -ERESTARTSYS;
933
934 cam = video_get_drvdata(to_video_device(cd));
935 if (!cam) {
936 up(&et61x251_sysfs_lock);
937 return -ENODEV;
938 }
939
940 if (!(cam->sensor->sysfs_ops & ET61X251_I2C_READ)) {
941 up(&et61x251_sysfs_lock);
942 return -ENOSYS;
943 }
944
945 value = et61x251_strtou8(buf, len, &count);
946 if (!count) {
947 up(&et61x251_sysfs_lock);
948 return -EINVAL;
949 }
950
951 err = et61x251_i2c_write(cam, cam->sysfs.i2c_reg, value);
952 if (err) {
953 up(&et61x251_sysfs_lock);
954 return -EIO;
955 }
956
957 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
958 cam->sysfs.i2c_reg, value);
959 DBG(3, "Written bytes: %zd", count);
960
961 up(&et61x251_sysfs_lock);
962
963 return count;
964}
965
966
967static CLASS_DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
968 et61x251_show_reg, et61x251_store_reg);
969static CLASS_DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
970 et61x251_show_val, et61x251_store_val);
971static CLASS_DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
972 et61x251_show_i2c_reg, et61x251_store_i2c_reg);
973static CLASS_DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
974 et61x251_show_i2c_val, et61x251_store_i2c_val);
975
976
977static void et61x251_create_sysfs(struct et61x251_device* cam)
978{
979 struct video_device *v4ldev = cam->v4ldev;
980
981 video_device_create_file(v4ldev, &class_device_attr_reg);
982 video_device_create_file(v4ldev, &class_device_attr_val);
983 if (cam->sensor && cam->sensor->sysfs_ops) {
984 video_device_create_file(v4ldev, &class_device_attr_i2c_reg);
985 video_device_create_file(v4ldev, &class_device_attr_i2c_val);
986 }
987}
988#endif /* CONFIG_VIDEO_ADV_DEBUG */
989
990/*****************************************************************************/
991
992static int
993et61x251_set_pix_format(struct et61x251_device* cam,
994 struct v4l2_pix_format* pix)
995{
996 int r, err = 0;
997
998 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
999 err += r;
1000 if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1001 err += et61x251_write_reg(cam, r & 0xfd, 0x12);
1002 else
1003 err += et61x251_write_reg(cam, r | 0x02, 0x12);
1004
1005 return err ? -EIO : 0;
1006}
1007
1008
1009static int
1010et61x251_set_compression(struct et61x251_device* cam,
1011 struct v4l2_jpegcompression* compression)
1012{
1013 int r, err = 0;
1014
1015 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1016 err += r;
1017 if (compression->quality == 0)
1018 err += et61x251_write_reg(cam, r & 0xfb, 0x12);
1019 else
1020 err += et61x251_write_reg(cam, r | 0x04, 0x12);
1021
1022 return err ? -EIO : 0;
1023}
1024
1025
1026static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
1027{
1028 int r = 0, err = 0;
1029
1030 r = et61x251_read_reg(cam, 0x12);
1031 if (r < 0)
1032 err += r;
1033
1034 if (scale == 1)
1035 err += et61x251_write_reg(cam, r & ~0x01, 0x12);
1036 else if (scale == 2)
1037 err += et61x251_write_reg(cam, r | 0x01, 0x12);
1038
1039 if (err)
1040 return -EIO;
1041
1042 PDBGG("Scaling factor: %u", scale);
1043
1044 return 0;
1045}
1046
1047
1048static int
1049et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
1050{
1051 struct et61x251_sensor* s = cam->sensor;
1052 u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
1053 s->active_pixel.left),
1054 fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
1055 s->active_pixel.top),
1056 fmw_length = (u16)(rect->width),
1057 fmw_height = (u16)(rect->height);
1058 int err = 0;
1059
1060 err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
1061 err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
1062 err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
1063 err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
1064 err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
1065 | ((fmw_length & 0x300) >> 4)
1066 | ((fmw_height & 0x300) >> 2), 0x6d);
1067 if (err)
1068 return -EIO;
1069
1070 PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
1071 fmw_sx, fmw_sy, fmw_length, fmw_height);
1072
1073 return 0;
1074}
1075
1076
1077static int et61x251_init(struct et61x251_device* cam)
1078{
1079 struct et61x251_sensor* s = cam->sensor;
1080 struct v4l2_control ctrl;
1081 struct v4l2_queryctrl *qctrl;
1082 struct v4l2_rect* rect;
1083 u8 i = 0;
1084 int err = 0;
1085
1086 if (!(cam->state & DEV_INITIALIZED)) {
1087 init_waitqueue_head(&cam->open);
1088 qctrl = s->qctrl;
1089 rect = &(s->cropcap.defrect);
1090 cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
1091 } else { /* use current values */
1092 qctrl = s->_qctrl;
1093 rect = &(s->_rect);
1094 }
1095
1096 err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
1097 err += et61x251_set_crop(cam, rect);
1098 if (err)
1099 return err;
1100
1101 if (s->init) {
1102 err = s->init(cam);
1103 if (err) {
1104 DBG(3, "Sensor initialization failed");
1105 return err;
1106 }
1107 }
1108
1109 err += et61x251_set_compression(cam, &cam->compression);
1110 err += et61x251_set_pix_format(cam, &s->pix_format);
1111 if (s->set_pix_format)
1112 err += s->set_pix_format(cam, &s->pix_format);
1113 if (err)
1114 return err;
1115
1116 if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
1117 DBG(3, "Compressed video format is active, quality %d",
1118 cam->compression.quality);
1119 else
1120 DBG(3, "Uncompressed video format is active");
1121
1122 if (s->set_crop)
1123 if ((err = s->set_crop(cam, rect))) {
1124 DBG(3, "set_crop() failed");
1125 return err;
1126 }
1127
1128 if (s->set_ctrl) {
1129 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1130 if (s->qctrl[i].id != 0 &&
1131 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1132 ctrl.id = s->qctrl[i].id;
1133 ctrl.value = qctrl[i].default_value;
1134 err = s->set_ctrl(cam, &ctrl);
1135 if (err) {
1136 DBG(3, "Set %s control failed",
1137 s->qctrl[i].name);
1138 return err;
1139 }
1140 DBG(3, "Image sensor supports '%s' control",
1141 s->qctrl[i].name);
1142 }
1143 }
1144
1145 if (!(cam->state & DEV_INITIALIZED)) {
1146 init_MUTEX(&cam->fileop_sem);
1147 spin_lock_init(&cam->queue_lock);
1148 init_waitqueue_head(&cam->wait_frame);
1149 init_waitqueue_head(&cam->wait_stream);
1150 cam->nreadbuffers = 2;
1151 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1152 memcpy(&(s->_rect), &(s->cropcap.defrect),
1153 sizeof(struct v4l2_rect));
1154 cam->state |= DEV_INITIALIZED;
1155 }
1156
1157 DBG(2, "Initialization succeeded");
1158 return 0;
1159}
1160
1161
1162static void et61x251_release_resources(struct et61x251_device* cam)
1163{
1164 down(&et61x251_sysfs_lock);
1165
1166 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
1167 video_set_drvdata(cam->v4ldev, NULL);
1168 video_unregister_device(cam->v4ldev);
1169
1170 up(&et61x251_sysfs_lock);
1171
1172 kfree(cam->control_buffer);
1173}
1174
1175/*****************************************************************************/
1176
1177static int et61x251_open(struct inode* inode, struct file* filp)
1178{
1179 struct et61x251_device* cam;
1180 int err = 0;
1181
1182 /*
1183 This is the only safe way to prevent race conditions with
1184 disconnect
1185 */
1186 if (!down_read_trylock(&et61x251_disconnect))
1187 return -ERESTARTSYS;
1188
1189 cam = video_get_drvdata(video_devdata(filp));
1190
1191 if (down_interruptible(&cam->dev_sem)) {
1192 up_read(&et61x251_disconnect);
1193 return -ERESTARTSYS;
1194 }
1195
1196 if (cam->users) {
1197 DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
1198 if ((filp->f_flags & O_NONBLOCK) ||
1199 (filp->f_flags & O_NDELAY)) {
1200 err = -EWOULDBLOCK;
1201 goto out;
1202 }
1203 up(&cam->dev_sem);
1204 err = wait_event_interruptible_exclusive(cam->open,
1205 cam->state & DEV_DISCONNECTED
1206 || !cam->users);
1207 if (err) {
1208 up_read(&et61x251_disconnect);
1209 return err;
1210 }
1211 if (cam->state & DEV_DISCONNECTED) {
1212 up_read(&et61x251_disconnect);
1213 return -ENODEV;
1214 }
1215 down(&cam->dev_sem);
1216 }
1217
1218
1219 if (cam->state & DEV_MISCONFIGURED) {
1220 err = et61x251_init(cam);
1221 if (err) {
1222 DBG(1, "Initialization failed again. "
1223 "I will retry on next open().");
1224 goto out;
1225 }
1226 cam->state &= ~DEV_MISCONFIGURED;
1227 }
1228
1229 if ((err = et61x251_start_transfer(cam)))
1230 goto out;
1231
1232 filp->private_data = cam;
1233 cam->users++;
1234 cam->io = IO_NONE;
1235 cam->stream = STREAM_OFF;
1236 cam->nbuffers = 0;
1237 cam->frame_count = 0;
1238 et61x251_empty_framequeues(cam);
1239
1240 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
1241
1242out:
1243 up(&cam->dev_sem);
1244 up_read(&et61x251_disconnect);
1245 return err;
1246}
1247
1248
1249static int et61x251_release(struct inode* inode, struct file* filp)
1250{
1251 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1252
1253 down(&cam->dev_sem); /* prevent disconnect() to be called */
1254
1255 et61x251_stop_transfer(cam);
1256
1257 et61x251_release_buffers(cam);
1258
1259 if (cam->state & DEV_DISCONNECTED) {
1260 et61x251_release_resources(cam);
1261 up(&cam->dev_sem);
1262 kfree(cam);
1263 return 0;
1264 }
1265
1266 cam->users--;
1267 wake_up_interruptible_nr(&cam->open, 1);
1268
1269 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
1270
1271 up(&cam->dev_sem);
1272
1273 return 0;
1274}
1275
1276
1277static ssize_t
1278et61x251_read(struct file* filp, char __user * buf,
1279 size_t count, loff_t* f_pos)
1280{
1281 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1282 struct et61x251_frame_t* f, * i;
1283 unsigned long lock_flags;
1284 int err = 0;
1285
1286 if (down_interruptible(&cam->fileop_sem))
1287 return -ERESTARTSYS;
1288
1289 if (cam->state & DEV_DISCONNECTED) {
1290 DBG(1, "Device not present");
1291 up(&cam->fileop_sem);
1292 return -ENODEV;
1293 }
1294
1295 if (cam->state & DEV_MISCONFIGURED) {
1296 DBG(1, "The camera is misconfigured. Close and open it "
1297 "again.");
1298 up(&cam->fileop_sem);
1299 return -EIO;
1300 }
1301
1302 if (cam->io == IO_MMAP) {
1303 DBG(3, "Close and open the device again to choose the read "
1304 "method");
1305 up(&cam->fileop_sem);
1306 return -EINVAL;
1307 }
1308
1309 if (cam->io == IO_NONE) {
1310 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1311 IO_READ)) {
1312 DBG(1, "read() failed, not enough memory");
1313 up(&cam->fileop_sem);
1314 return -ENOMEM;
1315 }
1316 cam->io = IO_READ;
1317 cam->stream = STREAM_ON;
1318 }
1319
1320 if (list_empty(&cam->inqueue)) {
1321 if (!list_empty(&cam->outqueue))
1322 et61x251_empty_framequeues(cam);
1323 et61x251_queue_unusedframes(cam);
1324 }
1325
1326 if (!count) {
1327 up(&cam->fileop_sem);
1328 return 0;
1329 }
1330
1331 if (list_empty(&cam->outqueue)) {
1332 if (filp->f_flags & O_NONBLOCK) {
1333 up(&cam->fileop_sem);
1334 return -EAGAIN;
1335 }
1336 err = wait_event_interruptible
1337 ( cam->wait_frame,
1338 (!list_empty(&cam->outqueue)) ||
1339 (cam->state & DEV_DISCONNECTED) ||
1340 (cam->state & DEV_MISCONFIGURED) );
1341 if (err) {
1342 up(&cam->fileop_sem);
1343 return err;
1344 }
1345 if (cam->state & DEV_DISCONNECTED) {
1346 up(&cam->fileop_sem);
1347 return -ENODEV;
1348 }
1349 if (cam->state & DEV_MISCONFIGURED) {
1350 up(&cam->fileop_sem);
1351 return -EIO;
1352 }
1353 }
1354
1355 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1356
1357 if (count > f->buf.bytesused)
1358 count = f->buf.bytesused;
1359
1360 if (copy_to_user(buf, f->bufmem, count)) {
1361 err = -EFAULT;
1362 goto exit;
1363 }
1364 *f_pos += count;
1365
1366exit:
1367 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1368 list_for_each_entry(i, &cam->outqueue, frame)
1369 i->state = F_UNUSED;
1370 INIT_LIST_HEAD(&cam->outqueue);
1371 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1372
1373 et61x251_queue_unusedframes(cam);
1374
1375 PDBGG("Frame #%lu, bytes read: %zu",
1376 (unsigned long)f->buf.index, count);
1377
1378 up(&cam->fileop_sem);
1379
1380 return err ? err : count;
1381}
1382
1383
1384static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1385{
1386 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1387 struct et61x251_frame_t* f;
1388 unsigned long lock_flags;
1389 unsigned int mask = 0;
1390
1391 if (down_interruptible(&cam->fileop_sem))
1392 return POLLERR;
1393
1394 if (cam->state & DEV_DISCONNECTED) {
1395 DBG(1, "Device not present");
1396 goto error;
1397 }
1398
1399 if (cam->state & DEV_MISCONFIGURED) {
1400 DBG(1, "The camera is misconfigured. Close and open it "
1401 "again.");
1402 goto error;
1403 }
1404
1405 if (cam->io == IO_NONE) {
1406 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1407 IO_READ)) {
1408 DBG(1, "poll() failed, not enough memory");
1409 goto error;
1410 }
1411 cam->io = IO_READ;
1412 cam->stream = STREAM_ON;
1413 }
1414
1415 if (cam->io == IO_READ) {
1416 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1417 list_for_each_entry(f, &cam->outqueue, frame)
1418 f->state = F_UNUSED;
1419 INIT_LIST_HEAD(&cam->outqueue);
1420 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1421 et61x251_queue_unusedframes(cam);
1422 }
1423
1424 poll_wait(filp, &cam->wait_frame, wait);
1425
1426 if (!list_empty(&cam->outqueue))
1427 mask |= POLLIN | POLLRDNORM;
1428
1429 up(&cam->fileop_sem);
1430
1431 return mask;
1432
1433error:
1434 up(&cam->fileop_sem);
1435 return POLLERR;
1436}
1437
1438
1439static void et61x251_vm_open(struct vm_area_struct* vma)
1440{
1441 struct et61x251_frame_t* f = vma->vm_private_data;
1442 f->vma_use_count++;
1443}
1444
1445
1446static void et61x251_vm_close(struct vm_area_struct* vma)
1447{
1448 /* NOTE: buffers are not freed here */
1449 struct et61x251_frame_t* f = vma->vm_private_data;
1450 f->vma_use_count--;
1451}
1452
1453
1454static struct vm_operations_struct et61x251_vm_ops = {
1455 .open = et61x251_vm_open,
1456 .close = et61x251_vm_close,
1457};
1458
1459
1460static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1461{
1462 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1463 unsigned long size = vma->vm_end - vma->vm_start,
1464 start = vma->vm_start;
1465 void *pos;
1466 u32 i;
1467
1468 if (down_interruptible(&cam->fileop_sem))
1469 return -ERESTARTSYS;
1470
1471 if (cam->state & DEV_DISCONNECTED) {
1472 DBG(1, "Device not present");
1473 up(&cam->fileop_sem);
1474 return -ENODEV;
1475 }
1476
1477 if (cam->state & DEV_MISCONFIGURED) {
1478 DBG(1, "The camera is misconfigured. Close and open it "
1479 "again.");
1480 up(&cam->fileop_sem);
1481 return -EIO;
1482 }
1483
1484 if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
1485 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1486 up(&cam->fileop_sem);
1487 return -EINVAL;
1488 }
1489
1490 for (i = 0; i < cam->nbuffers; i++) {
1491 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1492 break;
1493 }
1494 if (i == cam->nbuffers) {
1495 up(&cam->fileop_sem);
1496 return -EINVAL;
1497 }
1498
1499 vma->vm_flags |= VM_IO;
1500 vma->vm_flags |= VM_RESERVED;
1501
1502 pos = cam->frame[i].bufmem;
1503 while (size > 0) { /* size is page-aligned */
1504 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1505 up(&cam->fileop_sem);
1506 return -EAGAIN;
1507 }
1508 start += PAGE_SIZE;
1509 pos += PAGE_SIZE;
1510 size -= PAGE_SIZE;
1511 }
1512
1513 vma->vm_ops = &et61x251_vm_ops;
1514 vma->vm_private_data = &cam->frame[i];
1515
1516 et61x251_vm_open(vma);
1517
1518 up(&cam->fileop_sem);
1519
1520 return 0;
1521}
1522
1523/*****************************************************************************/
1524
1525static int
1526et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1527{
1528 struct v4l2_capability cap = {
1529 .driver = "et61x251",
1530 .version = ET61X251_MODULE_VERSION_CODE,
1531 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1532 V4L2_CAP_STREAMING,
1533 };
1534
1535 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1536 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1537 strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
1538 sizeof(cap.bus_info));
1539
1540 if (copy_to_user(arg, &cap, sizeof(cap)))
1541 return -EFAULT;
1542
1543 return 0;
1544}
1545
1546
1547static int
1548et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1549{
1550 struct v4l2_input i;
1551
1552 if (copy_from_user(&i, arg, sizeof(i)))
1553 return -EFAULT;
1554
1555 if (i.index)
1556 return -EINVAL;
1557
1558 memset(&i, 0, sizeof(i));
1559 strcpy(i.name, "Camera");
1560
1561 if (copy_to_user(arg, &i, sizeof(i)))
1562 return -EFAULT;
1563
1564 return 0;
1565}
1566
1567
1568static int
1569et61x251_vidioc_gs_input(struct et61x251_device* cam, void __user * arg)
1570{
1571 int index;
1572
1573 if (copy_from_user(&index, arg, sizeof(index)))
1574 return -EFAULT;
1575
1576 if (index != 0)
1577 return -EINVAL;
1578
1579 return 0;
1580}
1581
1582
1583static int
1584et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1585{
1586 struct et61x251_sensor* s = cam->sensor;
1587 struct v4l2_queryctrl qc;
1588 u8 i;
1589
1590 if (copy_from_user(&qc, arg, sizeof(qc)))
1591 return -EFAULT;
1592
1593 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1594 if (qc.id && qc.id == s->qctrl[i].id) {
1595 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1596 if (copy_to_user(arg, &qc, sizeof(qc)))
1597 return -EFAULT;
1598 return 0;
1599 }
1600
1601 return -EINVAL;
1602}
1603
1604
1605static int
1606et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1607{
1608 struct et61x251_sensor* s = cam->sensor;
1609 struct v4l2_control ctrl;
1610 int err = 0;
1611 u8 i;
1612
1613 if (!s->get_ctrl && !s->set_ctrl)
1614 return -EINVAL;
1615
1616 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1617 return -EFAULT;
1618
1619 if (!s->get_ctrl) {
1620 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1621 if (ctrl.id == s->qctrl[i].id) {
1622 ctrl.value = s->_qctrl[i].default_value;
1623 goto exit;
1624 }
1625 return -EINVAL;
1626 } else
1627 err = s->get_ctrl(cam, &ctrl);
1628
1629exit:
1630 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1631 return -EFAULT;
1632
1633 return err;
1634}
1635
1636
1637static int
1638et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1639{
1640 struct et61x251_sensor* s = cam->sensor;
1641 struct v4l2_control ctrl;
1642 u8 i;
1643 int err = 0;
1644
1645 if (!s->set_ctrl)
1646 return -EINVAL;
1647
1648 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1649 return -EFAULT;
1650
1651 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1652 if (ctrl.id == s->qctrl[i].id) {
1653 if (ctrl.value < s->qctrl[i].minimum ||
1654 ctrl.value > s->qctrl[i].maximum)
1655 return -ERANGE;
1656 ctrl.value -= ctrl.value % s->qctrl[i].step;
1657 break;
1658 }
1659
1660 if ((err = s->set_ctrl(cam, &ctrl)))
1661 return err;
1662
1663 s->_qctrl[i].default_value = ctrl.value;
1664
1665 return 0;
1666}
1667
1668
1669static int
1670et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1671{
1672 struct v4l2_cropcap* cc = &(cam->sensor->cropcap);
1673
1674 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1675 cc->pixelaspect.numerator = 1;
1676 cc->pixelaspect.denominator = 1;
1677
1678 if (copy_to_user(arg, cc, sizeof(*cc)))
1679 return -EFAULT;
1680
1681 return 0;
1682}
1683
1684
1685static int
1686et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1687{
1688 struct et61x251_sensor* s = cam->sensor;
1689 struct v4l2_crop crop = {
1690 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1691 };
1692
1693 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1694
1695 if (copy_to_user(arg, &crop, sizeof(crop)))
1696 return -EFAULT;
1697
1698 return 0;
1699}
1700
1701
1702static int
1703et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1704{
1705 struct et61x251_sensor* s = cam->sensor;
1706 struct v4l2_crop crop;
1707 struct v4l2_rect* rect;
1708 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1709 struct v4l2_pix_format* pix_format = &(s->pix_format);
1710 u8 scale;
1711 const enum et61x251_stream_state stream = cam->stream;
1712 const u32 nbuffers = cam->nbuffers;
1713 u32 i;
1714 int err = 0;
1715
1716 if (copy_from_user(&crop, arg, sizeof(crop)))
1717 return -EFAULT;
1718
1719 rect = &(crop.c);
1720
1721 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1722 return -EINVAL;
1723
1724 if (cam->module_param.force_munmap)
1725 for (i = 0; i < cam->nbuffers; i++)
1726 if (cam->frame[i].vma_use_count) {
1727 DBG(3, "VIDIOC_S_CROP failed. "
1728 "Unmap the buffers first.");
1729 return -EINVAL;
1730 }
1731
1732 /* Preserve R,G or B origin */
1733 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1734 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1735
1736 if (rect->width < 4)
1737 rect->width = 4;
1738 if (rect->height < 4)
1739 rect->height = 4;
1740 if (rect->width > bounds->width)
1741 rect->width = bounds->width;
1742 if (rect->height > bounds->height)
1743 rect->height = bounds->height;
1744 if (rect->left < bounds->left)
1745 rect->left = bounds->left;
1746 if (rect->top < bounds->top)
1747 rect->top = bounds->top;
1748 if (rect->left + rect->width > bounds->left + bounds->width)
1749 rect->left = bounds->left+bounds->width - rect->width;
1750 if (rect->top + rect->height > bounds->top + bounds->height)
1751 rect->top = bounds->top+bounds->height - rect->height;
1752
1753 rect->width &= ~3L;
1754 rect->height &= ~3L;
1755
1756 if (ET61X251_PRESERVE_IMGSCALE) {
1757 /* Calculate the actual scaling factor */
1758 u32 a, b;
1759 a = rect->width * rect->height;
1760 b = pix_format->width * pix_format->height;
1761 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1762 } else
1763 scale = 1;
1764
1765 if (cam->stream == STREAM_ON)
1766 if ((err = et61x251_stream_interrupt(cam)))
1767 return err;
1768
1769 if (copy_to_user(arg, &crop, sizeof(crop))) {
1770 cam->stream = stream;
1771 return -EFAULT;
1772 }
1773
1774 if (cam->module_param.force_munmap || cam->io == IO_READ)
1775 et61x251_release_buffers(cam);
1776
1777 err = et61x251_set_crop(cam, rect);
1778 if (s->set_crop)
1779 err += s->set_crop(cam, rect);
1780 err += et61x251_set_scale(cam, scale);
1781
1782 if (err) { /* atomic, no rollback in ioctl() */
1783 cam->state |= DEV_MISCONFIGURED;
1784 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1785 "use the camera, close and open /dev/video%d again.",
1786 cam->v4ldev->minor);
1787 return -EIO;
1788 }
1789
1790 s->pix_format.width = rect->width/scale;
1791 s->pix_format.height = rect->height/scale;
1792 memcpy(&(s->_rect), rect, sizeof(*rect));
1793
1794 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1795 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1796 cam->state |= DEV_MISCONFIGURED;
1797 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1798 "use the camera, close and open /dev/video%d again.",
1799 cam->v4ldev->minor);
1800 return -ENOMEM;
1801 }
1802
1803 if (cam->io == IO_READ)
1804 et61x251_empty_framequeues(cam);
1805 else if (cam->module_param.force_munmap)
1806 et61x251_requeue_outqueue(cam);
1807
1808 cam->stream = stream;
1809
1810 return 0;
1811}
1812
1813
1814static int
1815et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1816{
1817 struct v4l2_fmtdesc fmtd;
1818
1819 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1820 return -EFAULT;
1821
1822 if (fmtd.index == 0) {
1823 strcpy(fmtd.description, "bayer rgb");
1824 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1825 } else if (fmtd.index == 1) {
1826 strcpy(fmtd.description, "compressed");
1827 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1828 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1829 } else
1830 return -EINVAL;
1831
1832 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1833 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1834
1835 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1836 return -EFAULT;
1837
1838 return 0;
1839}
1840
1841
1842static int
1843et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1844{
1845 struct v4l2_format format;
1846 struct v4l2_pix_format* pfmt = &(cam->sensor->pix_format);
1847
1848 if (copy_from_user(&format, arg, sizeof(format)))
1849 return -EFAULT;
1850
1851 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1852 return -EINVAL;
1853
1854 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1855 ? 0 : (pfmt->width * pfmt->priv) / 8;
1856 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1857 pfmt->field = V4L2_FIELD_NONE;
1858 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1859
1860 if (copy_to_user(arg, &format, sizeof(format)))
1861 return -EFAULT;
1862
1863 return 0;
1864}
1865
1866
1867static int
1868et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1869 void __user * arg)
1870{
1871 struct et61x251_sensor* s = cam->sensor;
1872 struct v4l2_format format;
1873 struct v4l2_pix_format* pix;
1874 struct v4l2_pix_format* pfmt = &(s->pix_format);
1875 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1876 struct v4l2_rect rect;
1877 u8 scale;
1878 const enum et61x251_stream_state stream = cam->stream;
1879 const u32 nbuffers = cam->nbuffers;
1880 u32 i;
1881 int err = 0;
1882
1883 if (copy_from_user(&format, arg, sizeof(format)))
1884 return -EFAULT;
1885
1886 pix = &(format.fmt.pix);
1887
1888 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1889 return -EINVAL;
1890
1891 memcpy(&rect, &(s->_rect), sizeof(rect));
1892
1893 { /* calculate the actual scaling factor */
1894 u32 a, b;
1895 a = rect.width * rect.height;
1896 b = pix->width * pix->height;
1897 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1898 }
1899
1900 rect.width = scale * pix->width;
1901 rect.height = scale * pix->height;
1902
1903 if (rect.width < 4)
1904 rect.width = 4;
1905 if (rect.height < 4)
1906 rect.height = 4;
1907 if (rect.width > bounds->left + bounds->width - rect.left)
1908 rect.width = bounds->left + bounds->width - rect.left;
1909 if (rect.height > bounds->top + bounds->height - rect.top)
1910 rect.height = bounds->top + bounds->height - rect.top;
1911
1912 rect.width &= ~3L;
1913 rect.height &= ~3L;
1914
1915 { /* adjust the scaling factor */
1916 u32 a, b;
1917 a = rect.width * rect.height;
1918 b = pix->width * pix->height;
1919 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1920 }
1921
1922 pix->width = rect.width / scale;
1923 pix->height = rect.height / scale;
1924
1925 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
1926 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
1927 pix->pixelformat = pfmt->pixelformat;
1928 pix->priv = pfmt->priv; /* bpp */
1929 pix->colorspace = pfmt->colorspace;
1930 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1931 ? 0 : (pix->width * pix->priv) / 8;
1932 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
1933 pix->field = V4L2_FIELD_NONE;
1934
1935 if (cmd == VIDIOC_TRY_FMT) {
1936 if (copy_to_user(arg, &format, sizeof(format)))
1937 return -EFAULT;
1938 return 0;
1939 }
1940
1941 if (cam->module_param.force_munmap)
1942 for (i = 0; i < cam->nbuffers; i++)
1943 if (cam->frame[i].vma_use_count) {
1944 DBG(3, "VIDIOC_S_FMT failed. "
1945 "Unmap the buffers first.");
1946 return -EINVAL;
1947 }
1948
1949 if (cam->stream == STREAM_ON)
1950 if ((err = et61x251_stream_interrupt(cam)))
1951 return err;
1952
1953 if (copy_to_user(arg, &format, sizeof(format))) {
1954 cam->stream = stream;
1955 return -EFAULT;
1956 }
1957
1958 if (cam->module_param.force_munmap || cam->io == IO_READ)
1959 et61x251_release_buffers(cam);
1960
1961 err += et61x251_set_pix_format(cam, pix);
1962 err += et61x251_set_crop(cam, &rect);
1963 if (s->set_pix_format)
1964 err += s->set_pix_format(cam, pix);
1965 if (s->set_crop)
1966 err += s->set_crop(cam, &rect);
1967 err += et61x251_set_scale(cam, scale);
1968
1969 if (err) { /* atomic, no rollback in ioctl() */
1970 cam->state |= DEV_MISCONFIGURED;
1971 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
1972 "use the camera, close and open /dev/video%d again.",
1973 cam->v4ldev->minor);
1974 return -EIO;
1975 }
1976
1977 memcpy(pfmt, pix, sizeof(*pix));
1978 memcpy(&(s->_rect), &rect, sizeof(rect));
1979
1980 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1981 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1982 cam->state |= DEV_MISCONFIGURED;
1983 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
1984 "use the camera, close and open /dev/video%d again.",
1985 cam->v4ldev->minor);
1986 return -ENOMEM;
1987 }
1988
1989 if (cam->io == IO_READ)
1990 et61x251_empty_framequeues(cam);
1991 else if (cam->module_param.force_munmap)
1992 et61x251_requeue_outqueue(cam);
1993
1994 cam->stream = stream;
1995
1996 return 0;
1997}
1998
1999
2000static int
2001et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2002{
2003 if (copy_to_user(arg, &cam->compression,
2004 sizeof(cam->compression)))
2005 return -EFAULT;
2006
2007 return 0;
2008}
2009
2010
2011static int
2012et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2013{
2014 struct v4l2_jpegcompression jc;
2015 const enum et61x251_stream_state stream = cam->stream;
2016 int err = 0;
2017
2018 if (copy_from_user(&jc, arg, sizeof(jc)))
2019 return -EFAULT;
2020
2021 if (jc.quality != 0 && jc.quality != 1)
2022 return -EINVAL;
2023
2024 if (cam->stream == STREAM_ON)
2025 if ((err = et61x251_stream_interrupt(cam)))
2026 return err;
2027
2028 err += et61x251_set_compression(cam, &jc);
2029 if (err) { /* atomic, no rollback in ioctl() */
2030 cam->state |= DEV_MISCONFIGURED;
2031 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2032 "problems. To use the camera, close and open "
2033 "/dev/video%d again.", cam->v4ldev->minor);
2034 return -EIO;
2035 }
2036
2037 cam->compression.quality = jc.quality;
2038
2039 cam->stream = stream;
2040
2041 return 0;
2042}
2043
2044
2045static int
2046et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2047{
2048 struct v4l2_requestbuffers rb;
2049 u32 i;
2050 int err;
2051
2052 if (copy_from_user(&rb, arg, sizeof(rb)))
2053 return -EFAULT;
2054
2055 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2056 rb.memory != V4L2_MEMORY_MMAP)
2057 return -EINVAL;
2058
2059 if (cam->io == IO_READ) {
2060 DBG(3, "Close and open the device again to choose the mmap "
2061 "I/O method");
2062 return -EINVAL;
2063 }
2064
2065 for (i = 0; i < cam->nbuffers; i++)
2066 if (cam->frame[i].vma_use_count) {
2067 DBG(3, "VIDIOC_REQBUFS failed. "
2068 "Previous buffers are still mapped.");
2069 return -EINVAL;
2070 }
2071
2072 if (cam->stream == STREAM_ON)
2073 if ((err = et61x251_stream_interrupt(cam)))
2074 return err;
2075
2076 et61x251_empty_framequeues(cam);
2077
2078 et61x251_release_buffers(cam);
2079 if (rb.count)
2080 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2081
2082 if (copy_to_user(arg, &rb, sizeof(rb))) {
2083 et61x251_release_buffers(cam);
2084 cam->io = IO_NONE;
2085 return -EFAULT;
2086 }
2087
2088 cam->io = rb.count ? IO_MMAP : IO_NONE;
2089
2090 return 0;
2091}
2092
2093
2094static int
2095et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2096{
2097 struct v4l2_buffer b;
2098
2099 if (copy_from_user(&b, arg, sizeof(b)))
2100 return -EFAULT;
2101
2102 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2103 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2104 return -EINVAL;
2105
2106 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2107
2108 if (cam->frame[b.index].vma_use_count)
2109 b.flags |= V4L2_BUF_FLAG_MAPPED;
2110
2111 if (cam->frame[b.index].state == F_DONE)
2112 b.flags |= V4L2_BUF_FLAG_DONE;
2113 else if (cam->frame[b.index].state != F_UNUSED)
2114 b.flags |= V4L2_BUF_FLAG_QUEUED;
2115
2116 if (copy_to_user(arg, &b, sizeof(b)))
2117 return -EFAULT;
2118
2119 return 0;
2120}
2121
2122
2123static int
2124et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2125{
2126 struct v4l2_buffer b;
2127 unsigned long lock_flags;
2128
2129 if (copy_from_user(&b, arg, sizeof(b)))
2130 return -EFAULT;
2131
2132 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2133 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2134 return -EINVAL;
2135
2136 if (cam->frame[b.index].state != F_UNUSED)
2137 return -EINVAL;
2138
2139 cam->frame[b.index].state = F_QUEUED;
2140
2141 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2142 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2143 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2144
2145 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2146
2147 return 0;
2148}
2149
2150
2151static int
2152et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2153 void __user * arg)
2154{
2155 struct v4l2_buffer b;
2156 struct et61x251_frame_t *f;
2157 unsigned long lock_flags;
2158 int err = 0;
2159
2160 if (copy_from_user(&b, arg, sizeof(b)))
2161 return -EFAULT;
2162
2163 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2164 return -EINVAL;
2165
2166 if (list_empty(&cam->outqueue)) {
2167 if (cam->stream == STREAM_OFF)
2168 return -EINVAL;
2169 if (filp->f_flags & O_NONBLOCK)
2170 return -EAGAIN;
2171 err = wait_event_interruptible
2172 ( cam->wait_frame,
2173 (!list_empty(&cam->outqueue)) ||
2174 (cam->state & DEV_DISCONNECTED) ||
2175 (cam->state & DEV_MISCONFIGURED) );
2176 if (err)
2177 return err;
2178 if (cam->state & DEV_DISCONNECTED)
2179 return -ENODEV;
2180 if (cam->state & DEV_MISCONFIGURED)
2181 return -EIO;
2182 }
2183
2184 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2185 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2186 list_del(cam->outqueue.next);
2187 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2188
2189 f->state = F_UNUSED;
2190
2191 memcpy(&b, &f->buf, sizeof(b));
2192 if (f->vma_use_count)
2193 b.flags |= V4L2_BUF_FLAG_MAPPED;
2194
2195 if (copy_to_user(arg, &b, sizeof(b)))
2196 return -EFAULT;
2197
2198 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2199
2200 return 0;
2201}
2202
2203
2204static int
2205et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2206{
2207 int type;
2208
2209 if (copy_from_user(&type, arg, sizeof(type)))
2210 return -EFAULT;
2211
2212 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2213 return -EINVAL;
2214
2215 if (list_empty(&cam->inqueue))
2216 return -EINVAL;
2217
2218 cam->stream = STREAM_ON;
2219
2220 DBG(3, "Stream on");
2221
2222 return 0;
2223}
2224
2225
2226static int
2227et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2228{
2229 int type, err;
2230
2231 if (copy_from_user(&type, arg, sizeof(type)))
2232 return -EFAULT;
2233
2234 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2235 return -EINVAL;
2236
2237 if (cam->stream == STREAM_ON)
2238 if ((err = et61x251_stream_interrupt(cam)))
2239 return err;
2240
2241 et61x251_empty_framequeues(cam);
2242
2243 DBG(3, "Stream off");
2244
2245 return 0;
2246}
2247
2248
2249static int
2250et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2251{
2252 struct v4l2_streamparm sp;
2253
2254 if (copy_from_user(&sp, arg, sizeof(sp)))
2255 return -EFAULT;
2256
2257 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2258 return -EINVAL;
2259
2260 sp.parm.capture.extendedmode = 0;
2261 sp.parm.capture.readbuffers = cam->nreadbuffers;
2262
2263 if (copy_to_user(arg, &sp, sizeof(sp)))
2264 return -EFAULT;
2265
2266 return 0;
2267}
2268
2269
2270static int
2271et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2272{
2273 struct v4l2_streamparm sp;
2274
2275 if (copy_from_user(&sp, arg, sizeof(sp)))
2276 return -EFAULT;
2277
2278 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2279 return -EINVAL;
2280
2281 sp.parm.capture.extendedmode = 0;
2282
2283 if (sp.parm.capture.readbuffers == 0)
2284 sp.parm.capture.readbuffers = cam->nreadbuffers;
2285
2286 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2287 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2288
2289 if (copy_to_user(arg, &sp, sizeof(sp)))
2290 return -EFAULT;
2291
2292 cam->nreadbuffers = sp.parm.capture.readbuffers;
2293
2294 return 0;
2295}
2296
2297
2298static int et61x251_ioctl_v4l2(struct inode* inode, struct file* filp,
2299 unsigned int cmd, void __user * arg)
2300{
2301 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2302
2303 switch (cmd) {
2304
2305 case VIDIOC_QUERYCAP:
2306 return et61x251_vidioc_querycap(cam, arg);
2307
2308 case VIDIOC_ENUMINPUT:
2309 return et61x251_vidioc_enuminput(cam, arg);
2310
2311 case VIDIOC_G_INPUT:
2312 case VIDIOC_S_INPUT:
2313 return et61x251_vidioc_gs_input(cam, arg);
2314
2315 case VIDIOC_QUERYCTRL:
2316 return et61x251_vidioc_query_ctrl(cam, arg);
2317
2318 case VIDIOC_G_CTRL:
2319 return et61x251_vidioc_g_ctrl(cam, arg);
2320
2321 case VIDIOC_S_CTRL_OLD:
2322 case VIDIOC_S_CTRL:
2323 return et61x251_vidioc_s_ctrl(cam, arg);
2324
2325 case VIDIOC_CROPCAP_OLD:
2326 case VIDIOC_CROPCAP:
2327 return et61x251_vidioc_cropcap(cam, arg);
2328
2329 case VIDIOC_G_CROP:
2330 return et61x251_vidioc_g_crop(cam, arg);
2331
2332 case VIDIOC_S_CROP:
2333 return et61x251_vidioc_s_crop(cam, arg);
2334
2335 case VIDIOC_ENUM_FMT:
2336 return et61x251_vidioc_enum_fmt(cam, arg);
2337
2338 case VIDIOC_G_FMT:
2339 return et61x251_vidioc_g_fmt(cam, arg);
2340
2341 case VIDIOC_TRY_FMT:
2342 case VIDIOC_S_FMT:
2343 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2344
2345 case VIDIOC_G_JPEGCOMP:
2346 return et61x251_vidioc_g_jpegcomp(cam, arg);
2347
2348 case VIDIOC_S_JPEGCOMP:
2349 return et61x251_vidioc_s_jpegcomp(cam, arg);
2350
2351 case VIDIOC_REQBUFS:
2352 return et61x251_vidioc_reqbufs(cam, arg);
2353
2354 case VIDIOC_QUERYBUF:
2355 return et61x251_vidioc_querybuf(cam, arg);
2356
2357 case VIDIOC_QBUF:
2358 return et61x251_vidioc_qbuf(cam, arg);
2359
2360 case VIDIOC_DQBUF:
2361 return et61x251_vidioc_dqbuf(cam, filp, arg);
2362
2363 case VIDIOC_STREAMON:
2364 return et61x251_vidioc_streamon(cam, arg);
2365
2366 case VIDIOC_STREAMOFF:
2367 return et61x251_vidioc_streamoff(cam, arg);
2368
2369 case VIDIOC_G_PARM:
2370 return et61x251_vidioc_g_parm(cam, arg);
2371
2372 case VIDIOC_S_PARM_OLD:
2373 case VIDIOC_S_PARM:
2374 return et61x251_vidioc_s_parm(cam, arg);
2375
2376 case VIDIOC_G_STD:
2377 case VIDIOC_S_STD:
2378 case VIDIOC_QUERYSTD:
2379 case VIDIOC_ENUMSTD:
2380 case VIDIOC_QUERYMENU:
2381 return -EINVAL;
2382
2383 default:
2384 return -EINVAL;
2385
2386 }
2387}
2388
2389
2390static int et61x251_ioctl(struct inode* inode, struct file* filp,
2391 unsigned int cmd, unsigned long arg)
2392{
2393 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2394 int err = 0;
2395
2396 if (down_interruptible(&cam->fileop_sem))
2397 return -ERESTARTSYS;
2398
2399 if (cam->state & DEV_DISCONNECTED) {
2400 DBG(1, "Device not present");
2401 up(&cam->fileop_sem);
2402 return -ENODEV;
2403 }
2404
2405 if (cam->state & DEV_MISCONFIGURED) {
2406 DBG(1, "The camera is misconfigured. Close and open it "
2407 "again.");
2408 up(&cam->fileop_sem);
2409 return -EIO;
2410 }
2411
2412 V4LDBG(3, "et61x251", cmd);
2413
2414 err = et61x251_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
2415
2416 up(&cam->fileop_sem);
2417
2418 return err;
2419}
2420
2421
2422static struct file_operations et61x251_fops = {
2423 .owner = THIS_MODULE,
2424 .open = et61x251_open,
2425 .release = et61x251_release,
2426 .ioctl = et61x251_ioctl,
2427 .read = et61x251_read,
2428 .poll = et61x251_poll,
2429 .mmap = et61x251_mmap,
2430 .llseek = no_llseek,
2431};
2432
2433/*****************************************************************************/
2434
2435/* It exists a single interface only. We do not need to validate anything. */
2436static int
2437et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2438{
2439 struct usb_device *udev = interface_to_usbdev(intf);
2440 struct et61x251_device* cam;
2441 static unsigned int dev_nr = 0;
2442 unsigned int i;
2443 int err = 0;
2444
2445 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2446 return -ENOMEM;
2447
2448 cam->usbdev = udev;
2449
2450 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2451 DBG(1, "kmalloc() failed");
2452 err = -ENOMEM;
2453 goto fail;
2454 }
2455
2456 if (!(cam->v4ldev = video_device_alloc())) {
2457 DBG(1, "video_device_alloc() failed");
2458 err = -ENOMEM;
2459 goto fail;
2460 }
2461
2462 init_MUTEX(&cam->dev_sem);
2463
2464 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2465 "(vid/pid 0x%04X/0x%04X)",id->idVendor, id->idProduct);
2466
2467 for (i = 0; et61x251_sensor_table[i]; i++) {
2468 err = et61x251_sensor_table[i](cam);
2469 if (!err)
2470 break;
2471 }
2472
2473 if (!err && cam->sensor)
2474 DBG(2, "%s image sensor detected", cam->sensor->name);
2475 else {
2476 DBG(1, "No supported image sensor detected");
2477 err = -ENODEV;
2478 goto fail;
2479 }
2480
2481 if (et61x251_init(cam)) {
2482 DBG(1, "Initialization failed. I will retry on open().");
2483 cam->state |= DEV_MISCONFIGURED;
2484 }
2485
2486 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2487 cam->v4ldev->owner = THIS_MODULE;
2488 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
2489 cam->v4ldev->hardware = 0;
2490 cam->v4ldev->fops = &et61x251_fops;
2491 cam->v4ldev->minor = video_nr[dev_nr];
2492 cam->v4ldev->release = video_device_release;
2493 video_set_drvdata(cam->v4ldev, cam);
2494
2495 down(&cam->dev_sem);
2496
2497 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2498 video_nr[dev_nr]);
2499 if (err) {
2500 DBG(1, "V4L2 device registration failed");
2501 if (err == -ENFILE && video_nr[dev_nr] == -1)
2502 DBG(1, "Free /dev/videoX node not found");
2503 video_nr[dev_nr] = -1;
2504 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2505 up(&cam->dev_sem);
2506 goto fail;
2507 }
2508
2509 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
2510
2511 cam->module_param.force_munmap = force_munmap[dev_nr];
2512
2513 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2514
2515#ifdef CONFIG_VIDEO_ADV_DEBUG
2516 et61x251_create_sysfs(cam);
2517 DBG(2, "Optional device control through 'sysfs' interface ready");
2518#endif
2519
2520 usb_set_intfdata(intf, cam);
2521
2522 up(&cam->dev_sem);
2523
2524 return 0;
2525
2526fail:
2527 if (cam) {
2528 kfree(cam->control_buffer);
2529 if (cam->v4ldev)
2530 video_device_release(cam->v4ldev);
2531 kfree(cam);
2532 }
2533 return err;
2534}
2535
2536
2537static void et61x251_usb_disconnect(struct usb_interface* intf)
2538{
2539 struct et61x251_device* cam = usb_get_intfdata(intf);
2540
2541 if (!cam)
2542 return;
2543
2544 down_write(&et61x251_disconnect);
2545
2546 down(&cam->dev_sem);
2547
2548 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2549
2550 wake_up_interruptible_all(&cam->open);
2551
2552 if (cam->users) {
2553 DBG(2, "Device /dev/video%d is open! Deregistration and "
2554 "memory deallocation are deferred on close.",
2555 cam->v4ldev->minor);
2556 cam->state |= DEV_MISCONFIGURED;
2557 et61x251_stop_transfer(cam);
2558 cam->state |= DEV_DISCONNECTED;
2559 wake_up_interruptible(&cam->wait_frame);
2560 wake_up_interruptible(&cam->wait_stream);
2561 } else {
2562 cam->state |= DEV_DISCONNECTED;
2563 et61x251_release_resources(cam);
2564 }
2565
2566 up(&cam->dev_sem);
2567
2568 if (!cam->users)
2569 kfree(cam);
2570
2571 up_write(&et61x251_disconnect);
2572}
2573
2574
2575static struct usb_driver et61x251_usb_driver = {
2576 .name = "et61x251",
2577 .id_table = et61x251_id_table,
2578 .probe = et61x251_usb_probe,
2579 .disconnect = et61x251_usb_disconnect,
2580};
2581
2582/*****************************************************************************/
2583
2584static int __init et61x251_module_init(void)
2585{
2586 int err = 0;
2587
2588 KDBG(2, ET61X251_MODULE_NAME " v" ET61X251_MODULE_VERSION);
2589 KDBG(3, ET61X251_MODULE_AUTHOR);
2590
2591 if ((err = usb_register(&et61x251_usb_driver)))
2592 KDBG(1, "usb_register() failed");
2593
2594 return err;
2595}
2596
2597
2598static void __exit et61x251_module_exit(void)
2599{
2600 usb_deregister(&et61x251_usb_driver);
2601}
2602
2603
2604module_init(et61x251_module_init);
2605module_exit(et61x251_module_exit);
diff --git a/drivers/usb/media/et61x251_sensor.h b/drivers/usb/media/et61x251_sensor.h
new file mode 100644
index 000000000000..b9df91062fc0
--- /dev/null
+++ b/drivers/usb/media/et61x251_sensor.h
@@ -0,0 +1,115 @@
1/***************************************************************************
2 * API for image sensors connected to ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
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 as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21#ifndef _ET61X251_SENSOR_H_
22#define _ET61X251_SENSOR_H_
23
24#include <linux/usb.h>
25#include <linux/videodev.h>
26#include <linux/device.h>
27#include <linux/stddef.h>
28#include <linux/errno.h>
29#include <asm/types.h>
30
31struct et61x251_device;
32struct et61x251_sensor;
33
34/*****************************************************************************/
35
36extern int et61x251_probe_tas5130d1b(struct et61x251_device* cam);
37
38#define ET61X251_SENSOR_TABLE \
39/* Weak detections must go at the end of the list */ \
40static int (*et61x251_sensor_table[])(struct et61x251_device*) = { \
41 &et61x251_probe_tas5130d1b, \
42 NULL, \
43};
44
45extern void
46et61x251_attach_sensor(struct et61x251_device* cam,
47 struct et61x251_sensor* sensor);
48
49/*****************************************************************************/
50
51extern int et61x251_write_reg(struct et61x251_device*, u8 value, u16 index);
52extern int et61x251_read_reg(struct et61x251_device*, u16 index);
53extern int et61x251_i2c_write(struct et61x251_device*, u8 address, u8 value);
54extern int et61x251_i2c_read(struct et61x251_device*, u8 address);
55extern int et61x251_i2c_try_write(struct et61x251_device*,
56 struct et61x251_sensor*, u8 address,
57 u8 value);
58extern int et61x251_i2c_try_read(struct et61x251_device*,
59 struct et61x251_sensor*, u8 address);
60extern int et61x251_i2c_raw_write(struct et61x251_device*, u8 n, u8 data1,
61 u8 data2, u8 data3, u8 data4, u8 data5,
62 u8 data6, u8 data7, u8 data8, u8 address);
63
64/*****************************************************************************/
65
66enum et61x251_i2c_sysfs_ops {
67 ET61X251_I2C_READ = 0x01,
68 ET61X251_I2C_WRITE = 0x02,
69};
70
71enum et61x251_i2c_interface {
72 ET61X251_I2C_2WIRES,
73 ET61X251_I2C_3WIRES,
74};
75
76/* Repeat start condition when RSTA is high */
77enum et61x251_i2c_rsta {
78 ET61X251_I2C_RSTA_STOP = 0x00, /* stop then start */
79 ET61X251_I2C_RSTA_REPEAT = 0x01, /* repeat start */
80};
81
82#define ET61X251_MAX_CTRLS V4L2_CID_LASTP1-V4L2_CID_BASE+10
83
84struct et61x251_sensor {
85 char name[32];
86
87 enum et61x251_i2c_sysfs_ops sysfs_ops;
88
89 enum et61x251_i2c_interface interface;
90 u8 i2c_slave_id;
91 enum et61x251_i2c_rsta rsta;
92 struct v4l2_rect active_pixel; /* left and top define FVSX and FVSY */
93
94 struct v4l2_queryctrl qctrl[ET61X251_MAX_CTRLS];
95 struct v4l2_cropcap cropcap;
96 struct v4l2_pix_format pix_format;
97
98 int (*init)(struct et61x251_device* cam);
99 int (*get_ctrl)(struct et61x251_device* cam,
100 struct v4l2_control* ctrl);
101 int (*set_ctrl)(struct et61x251_device* cam,
102 const struct v4l2_control* ctrl);
103 int (*set_crop)(struct et61x251_device* cam,
104 const struct v4l2_rect* rect);
105 int (*set_pix_format)(struct et61x251_device* cam,
106 const struct v4l2_pix_format* pix);
107
108 const struct usb_device* usbdev;
109
110 /* Private */
111 struct v4l2_queryctrl _qctrl[ET61X251_MAX_CTRLS];
112 struct v4l2_rect _rect;
113};
114
115#endif /* _ET61X251_SENSOR_H_ */
diff --git a/drivers/usb/media/et61x251_tas5130d1b.c b/drivers/usb/media/et61x251_tas5130d1b.c
new file mode 100644
index 000000000000..65f1ae9cf2b3
--- /dev/null
+++ b/drivers/usb/media/et61x251_tas5130d1b.c
@@ -0,0 +1,137 @@
1/***************************************************************************
2 * Plug-in for TAS5130D1B image sensor connected to the ET61X[12]51 *
3 * PC Camera Controllers *
4 * *
5 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
16 * *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the Free Software *
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
20 ***************************************************************************/
21
22#include "et61x251_sensor.h"
23
24
25static int tas5130d1b_init(struct et61x251_device* cam)
26{
27 int err = 0;
28
29 err += et61x251_write_reg(cam, 0x14, 0x01);
30 err += et61x251_write_reg(cam, 0x1b, 0x02);
31 err += et61x251_write_reg(cam, 0x02, 0x12);
32 err += et61x251_write_reg(cam, 0x0e, 0x60);
33 err += et61x251_write_reg(cam, 0x80, 0x61);
34 err += et61x251_write_reg(cam, 0xf0, 0x62);
35 err += et61x251_write_reg(cam, 0x03, 0x63);
36 err += et61x251_write_reg(cam, 0x14, 0x64);
37 err += et61x251_write_reg(cam, 0xf4, 0x65);
38 err += et61x251_write_reg(cam, 0x01, 0x66);
39 err += et61x251_write_reg(cam, 0x05, 0x67);
40 err += et61x251_write_reg(cam, 0x8f, 0x68);
41 err += et61x251_write_reg(cam, 0x0f, 0x8d);
42 err += et61x251_write_reg(cam, 0x08, 0x8e);
43
44 return err;
45}
46
47
48static int tas5130d1b_set_ctrl(struct et61x251_device* cam,
49 const struct v4l2_control* ctrl)
50{
51 int err = 0;
52
53 switch (ctrl->id) {
54 case V4L2_CID_GAIN:
55 err += et61x251_i2c_raw_write(cam, 2, 0x20,
56 0xf6-ctrl->value, 0, 0, 0,
57 0, 0, 0, 0);
58 break;
59 case V4L2_CID_EXPOSURE:
60 err += et61x251_i2c_raw_write(cam, 2, 0x40,
61 0x47-ctrl->value, 0, 0, 0,
62 0, 0, 0, 0);
63 break;
64 default:
65 return -EINVAL;
66 }
67
68 return err ? -EIO : 0;
69}
70
71
72static struct et61x251_sensor tas5130d1b = {
73 .name = "TAS5130D1B",
74 .interface = ET61X251_I2C_3WIRES,
75 .rsta = ET61X251_I2C_RSTA_STOP,
76 .active_pixel = {
77 .left = 106,
78 .top = 13,
79 },
80 .init = &tas5130d1b_init,
81 .qctrl = {
82 {
83 .id = V4L2_CID_GAIN,
84 .type = V4L2_CTRL_TYPE_INTEGER,
85 .name = "global gain",
86 .minimum = 0x00,
87 .maximum = 0xf6,
88 .step = 0x02,
89 .default_value = 0x0d,
90 .flags = 0,
91 },
92 {
93 .id = V4L2_CID_EXPOSURE,
94 .type = V4L2_CTRL_TYPE_INTEGER,
95 .name = "exposure",
96 .minimum = 0x00,
97 .maximum = 0x47,
98 .step = 0x01,
99 .default_value = 0x23,
100 .flags = 0,
101 },
102 },
103 .set_ctrl = &tas5130d1b_set_ctrl,
104 .cropcap = {
105 .bounds = {
106 .left = 0,
107 .top = 0,
108 .width = 640,
109 .height = 480,
110 },
111 .defrect = {
112 .left = 0,
113 .top = 0,
114 .width = 640,
115 .height = 480,
116 },
117 },
118 .pix_format = {
119 .width = 640,
120 .height = 480,
121 .pixelformat = V4L2_PIX_FMT_SBGGR8,
122 .priv = 8,
123 },
124};
125
126
127int et61x251_probe_tas5130d1b(struct et61x251_device* cam)
128{
129 /* This sensor has no identifiers, so let's attach it anyway */
130 et61x251_attach_sensor(cam, &tas5130d1b);
131
132 /* Sensor detection is based on USB pid/vid */
133 if (le16_to_cpu(tas5130d1b.usbdev->descriptor.idProduct) != 0x6251)
134 return -ENODEV;
135
136 return 0;
137}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 15:16:14 -0500