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0a71d9ce JFM |
1 | /* |
2 | * Benq DC E300 subdriver | |
3 | * | |
4 | * Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr) | |
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 | * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
133a9fe9 JP |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
0a71d9ce JFM |
23 | #define MODULE_NAME "benq" |
24 | ||
25 | #include "gspca.h" | |
26 | ||
27 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); | |
28 | MODULE_DESCRIPTION("Benq DC E300 USB Camera Driver"); | |
29 | MODULE_LICENSE("GPL"); | |
30 | ||
31 | /* specific webcam descriptor */ | |
32 | struct sd { | |
33 | struct gspca_dev gspca_dev; /* !! must be the first item */ | |
34 | }; | |
35 | ||
0a71d9ce JFM |
36 | static const struct v4l2_pix_format vga_mode[] = { |
37 | {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, | |
38 | .bytesperline = 320, | |
39 | .sizeimage = 320 * 240 * 3 / 8 + 590, | |
40 | .colorspace = V4L2_COLORSPACE_JPEG}, | |
41 | }; | |
42 | ||
43 | static void sd_isoc_irq(struct urb *urb); | |
44 | ||
45 | /* -- write a register -- */ | |
46 | static void reg_w(struct gspca_dev *gspca_dev, | |
47 | u16 value, u16 index) | |
48 | { | |
49 | struct usb_device *dev = gspca_dev->dev; | |
50 | int ret; | |
51 | ||
52 | if (gspca_dev->usb_err < 0) | |
53 | return; | |
54 | ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
55 | 0x02, | |
56 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
57 | value, | |
58 | index, | |
59 | NULL, | |
60 | 0, | |
61 | 500); | |
62 | if (ret < 0) { | |
133a9fe9 | 63 | pr_err("reg_w err %d\n", ret); |
0a71d9ce JFM |
64 | gspca_dev->usb_err = ret; |
65 | } | |
66 | } | |
67 | ||
68 | /* this function is called at probe time */ | |
69 | static int sd_config(struct gspca_dev *gspca_dev, | |
70 | const struct usb_device_id *id) | |
71 | { | |
72 | gspca_dev->cam.cam_mode = vga_mode; | |
73 | gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode); | |
74 | gspca_dev->cam.no_urb_create = 1; | |
0a71d9ce JFM |
75 | return 0; |
76 | } | |
77 | ||
78 | /* this function is called at probe and resume time */ | |
79 | static int sd_init(struct gspca_dev *gspca_dev) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
0a71d9ce JFM |
84 | /* -- start the camera -- */ |
85 | static int sd_start(struct gspca_dev *gspca_dev) | |
86 | { | |
87 | struct urb *urb; | |
88 | int i, n; | |
89 | ||
90 | /* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */ | |
91 | #if MAX_NURBS < 4 | |
92 | #error "Not enough URBs in the gspca table" | |
93 | #endif | |
94 | #define SD_PKT_SZ 64 | |
95 | #define SD_NPKT 32 | |
96 | for (n = 0; n < 4; n++) { | |
97 | urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL); | |
60e36999 | 98 | if (!urb) |
0a71d9ce | 99 | return -ENOMEM; |
0a71d9ce | 100 | gspca_dev->urb[n] = urb; |
997ea58e | 101 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
0a71d9ce JFM |
102 | SD_PKT_SZ * SD_NPKT, |
103 | GFP_KERNEL, | |
104 | &urb->transfer_dma); | |
105 | ||
106 | if (urb->transfer_buffer == NULL) { | |
133a9fe9 | 107 | pr_err("usb_alloc_coherent failed\n"); |
0a71d9ce JFM |
108 | return -ENOMEM; |
109 | } | |
110 | urb->dev = gspca_dev->dev; | |
111 | urb->context = gspca_dev; | |
112 | urb->transfer_buffer_length = SD_PKT_SZ * SD_NPKT; | |
113 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
114 | n & 1 ? 0x82 : 0x83); | |
115 | urb->transfer_flags = URB_ISO_ASAP | |
116 | | URB_NO_TRANSFER_DMA_MAP; | |
117 | urb->interval = 1; | |
118 | urb->complete = sd_isoc_irq; | |
119 | urb->number_of_packets = SD_NPKT; | |
120 | for (i = 0; i < SD_NPKT; i++) { | |
121 | urb->iso_frame_desc[i].length = SD_PKT_SZ; | |
122 | urb->iso_frame_desc[i].offset = SD_PKT_SZ * i; | |
123 | } | |
124 | } | |
125 | ||
126 | return gspca_dev->usb_err; | |
127 | } | |
128 | ||
129 | static void sd_stopN(struct gspca_dev *gspca_dev) | |
130 | { | |
6121ca57 JFM |
131 | struct usb_interface *intf; |
132 | ||
0a71d9ce JFM |
133 | reg_w(gspca_dev, 0x003c, 0x0003); |
134 | reg_w(gspca_dev, 0x003c, 0x0004); | |
135 | reg_w(gspca_dev, 0x003c, 0x0005); | |
136 | reg_w(gspca_dev, 0x003c, 0x0006); | |
137 | reg_w(gspca_dev, 0x003c, 0x0007); | |
6121ca57 JFM |
138 | |
139 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
780e3121 | 140 | usb_set_interface(gspca_dev->dev, gspca_dev->iface, |
6121ca57 | 141 | intf->num_altsetting - 1); |
0a71d9ce JFM |
142 | } |
143 | ||
144 | static void sd_pkt_scan(struct gspca_dev *gspca_dev, | |
145 | u8 *data, /* isoc packet */ | |
146 | int len) /* iso packet length */ | |
147 | { | |
148 | /* unused */ | |
149 | } | |
150 | ||
151 | /* reception of an URB */ | |
152 | static void sd_isoc_irq(struct urb *urb) | |
153 | { | |
154 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
155 | struct urb *urb0; | |
156 | u8 *data; | |
157 | int i, st; | |
158 | ||
159 | PDEBUG(D_PACK, "sd isoc irq"); | |
160 | if (!gspca_dev->streaming) | |
161 | return; | |
162 | if (urb->status != 0) { | |
163 | if (urb->status == -ESHUTDOWN) | |
164 | return; /* disconnection */ | |
165 | #ifdef CONFIG_PM | |
166 | if (gspca_dev->frozen) | |
167 | return; | |
168 | #endif | |
133a9fe9 | 169 | pr_err("urb status: %d\n", urb->status); |
0a71d9ce JFM |
170 | return; |
171 | } | |
172 | ||
173 | /* if this is a control URN (ep 0x83), wait */ | |
174 | if (urb == gspca_dev->urb[0] || urb == gspca_dev->urb[2]) | |
175 | return; | |
176 | ||
177 | /* scan both received URBs */ | |
178 | if (urb == gspca_dev->urb[1]) | |
179 | urb0 = gspca_dev->urb[0]; | |
180 | else | |
181 | urb0 = gspca_dev->urb[2]; | |
182 | for (i = 0; i < urb->number_of_packets; i++) { | |
183 | ||
184 | /* check the packet status and length */ | |
185 | if (urb0->iso_frame_desc[i].actual_length != SD_PKT_SZ | |
186 | || urb->iso_frame_desc[i].actual_length != SD_PKT_SZ) { | |
c93396e1 | 187 | PERR("ISOC bad lengths %d / %d", |
0a71d9ce JFM |
188 | urb0->iso_frame_desc[i].actual_length, |
189 | urb->iso_frame_desc[i].actual_length); | |
190 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
191 | continue; | |
192 | } | |
193 | st = urb0->iso_frame_desc[i].status; | |
194 | if (st == 0) | |
195 | st = urb->iso_frame_desc[i].status; | |
196 | if (st) { | |
133a9fe9 | 197 | pr_err("ISOC data error: [%d] status=%d\n", |
0a71d9ce JFM |
198 | i, st); |
199 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
200 | continue; | |
201 | } | |
202 | ||
203 | /* | |
204 | * The images are received in URBs of different endpoints | |
205 | * (0x83 and 0x82). | |
206 | * Image pieces in URBs of ep 0x83 are continuated in URBs of | |
207 | * ep 0x82 of the same index. | |
208 | * The packets in the URBs of endpoint 0x83 start with: | |
209 | * - 80 ba/bb 00 00 = start of image followed by 'ff d8' | |
210 | * - 04 ba/bb oo oo = image piece | |
211 | * where 'oo oo' is the image offset | |
212 | (not cheked) | |
213 | * - (other -> bad frame) | |
214 | * The images are JPEG encoded with full header and | |
215 | * normal ff escape. | |
216 | * The end of image ('ff d9') may occur in any URB. | |
217 | * (not cheked) | |
218 | */ | |
219 | data = (u8 *) urb0->transfer_buffer | |
220 | + urb0->iso_frame_desc[i].offset; | |
221 | if (data[0] == 0x80 && (data[1] & 0xfe) == 0xba) { | |
222 | ||
223 | /* new image */ | |
224 | gspca_frame_add(gspca_dev, LAST_PACKET, | |
225 | NULL, 0); | |
226 | gspca_frame_add(gspca_dev, FIRST_PACKET, | |
227 | data + 4, SD_PKT_SZ - 4); | |
228 | } else if (data[0] == 0x04 && (data[1] & 0xfe) == 0xba) { | |
229 | gspca_frame_add(gspca_dev, INTER_PACKET, | |
230 | data + 4, SD_PKT_SZ - 4); | |
231 | } else { | |
232 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
233 | continue; | |
234 | } | |
235 | data = (u8 *) urb->transfer_buffer | |
236 | + urb->iso_frame_desc[i].offset; | |
ebb32634 MCC |
237 | gspca_frame_add(gspca_dev, INTER_PACKET, |
238 | data, SD_PKT_SZ); | |
0a71d9ce JFM |
239 | } |
240 | ||
241 | /* resubmit the URBs */ | |
242 | st = usb_submit_urb(urb0, GFP_ATOMIC); | |
243 | if (st < 0) | |
133a9fe9 | 244 | pr_err("usb_submit_urb(0) ret %d\n", st); |
0a71d9ce JFM |
245 | st = usb_submit_urb(urb, GFP_ATOMIC); |
246 | if (st < 0) | |
133a9fe9 | 247 | pr_err("usb_submit_urb() ret %d\n", st); |
0a71d9ce JFM |
248 | } |
249 | ||
250 | /* sub-driver description */ | |
251 | static const struct sd_desc sd_desc = { | |
252 | .name = MODULE_NAME, | |
0a71d9ce JFM |
253 | .config = sd_config, |
254 | .init = sd_init, | |
0a71d9ce JFM |
255 | .start = sd_start, |
256 | .stopN = sd_stopN, | |
257 | .pkt_scan = sd_pkt_scan, | |
258 | }; | |
259 | ||
260 | /* -- module initialisation -- */ | |
95c967c1 | 261 | static const struct usb_device_id device_table[] = { |
0a71d9ce JFM |
262 | {USB_DEVICE(0x04a5, 0x3035)}, |
263 | {} | |
264 | }; | |
265 | MODULE_DEVICE_TABLE(usb, device_table); | |
266 | ||
267 | /* -- device connect -- */ | |
268 | static int sd_probe(struct usb_interface *intf, | |
269 | const struct usb_device_id *id) | |
270 | { | |
271 | return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), | |
272 | THIS_MODULE); | |
273 | } | |
274 | ||
275 | static struct usb_driver sd_driver = { | |
276 | .name = MODULE_NAME, | |
277 | .id_table = device_table, | |
278 | .probe = sd_probe, | |
279 | .disconnect = gspca_disconnect, | |
280 | #ifdef CONFIG_PM | |
281 | .suspend = gspca_suspend, | |
282 | .resume = gspca_resume, | |
8bb58964 | 283 | .reset_resume = gspca_resume, |
0a71d9ce JFM |
284 | #endif |
285 | }; | |
286 | ||
ecb3b2b3 | 287 | module_usb_driver(sd_driver); |