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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); | |
98 | if (!urb) { | |
133a9fe9 | 99 | pr_err("usb_alloc_urb failed\n"); |
0a71d9ce JFM |
100 | return -ENOMEM; |
101 | } | |
102 | gspca_dev->urb[n] = urb; | |
997ea58e | 103 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
0a71d9ce JFM |
104 | SD_PKT_SZ * SD_NPKT, |
105 | GFP_KERNEL, | |
106 | &urb->transfer_dma); | |
107 | ||
108 | if (urb->transfer_buffer == NULL) { | |
133a9fe9 | 109 | pr_err("usb_alloc_coherent failed\n"); |
0a71d9ce JFM |
110 | return -ENOMEM; |
111 | } | |
112 | urb->dev = gspca_dev->dev; | |
113 | urb->context = gspca_dev; | |
114 | urb->transfer_buffer_length = SD_PKT_SZ * SD_NPKT; | |
115 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
116 | n & 1 ? 0x82 : 0x83); | |
117 | urb->transfer_flags = URB_ISO_ASAP | |
118 | | URB_NO_TRANSFER_DMA_MAP; | |
119 | urb->interval = 1; | |
120 | urb->complete = sd_isoc_irq; | |
121 | urb->number_of_packets = SD_NPKT; | |
122 | for (i = 0; i < SD_NPKT; i++) { | |
123 | urb->iso_frame_desc[i].length = SD_PKT_SZ; | |
124 | urb->iso_frame_desc[i].offset = SD_PKT_SZ * i; | |
125 | } | |
126 | } | |
127 | ||
128 | return gspca_dev->usb_err; | |
129 | } | |
130 | ||
131 | static void sd_stopN(struct gspca_dev *gspca_dev) | |
132 | { | |
6121ca57 JFM |
133 | struct usb_interface *intf; |
134 | ||
0a71d9ce JFM |
135 | reg_w(gspca_dev, 0x003c, 0x0003); |
136 | reg_w(gspca_dev, 0x003c, 0x0004); | |
137 | reg_w(gspca_dev, 0x003c, 0x0005); | |
138 | reg_w(gspca_dev, 0x003c, 0x0006); | |
139 | reg_w(gspca_dev, 0x003c, 0x0007); | |
6121ca57 JFM |
140 | |
141 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
780e3121 | 142 | usb_set_interface(gspca_dev->dev, gspca_dev->iface, |
6121ca57 | 143 | intf->num_altsetting - 1); |
0a71d9ce JFM |
144 | } |
145 | ||
146 | static void sd_pkt_scan(struct gspca_dev *gspca_dev, | |
147 | u8 *data, /* isoc packet */ | |
148 | int len) /* iso packet length */ | |
149 | { | |
150 | /* unused */ | |
151 | } | |
152 | ||
153 | /* reception of an URB */ | |
154 | static void sd_isoc_irq(struct urb *urb) | |
155 | { | |
156 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
157 | struct urb *urb0; | |
158 | u8 *data; | |
159 | int i, st; | |
160 | ||
161 | PDEBUG(D_PACK, "sd isoc irq"); | |
162 | if (!gspca_dev->streaming) | |
163 | return; | |
164 | if (urb->status != 0) { | |
165 | if (urb->status == -ESHUTDOWN) | |
166 | return; /* disconnection */ | |
167 | #ifdef CONFIG_PM | |
168 | if (gspca_dev->frozen) | |
169 | return; | |
170 | #endif | |
133a9fe9 | 171 | pr_err("urb status: %d\n", urb->status); |
0a71d9ce JFM |
172 | return; |
173 | } | |
174 | ||
175 | /* if this is a control URN (ep 0x83), wait */ | |
176 | if (urb == gspca_dev->urb[0] || urb == gspca_dev->urb[2]) | |
177 | return; | |
178 | ||
179 | /* scan both received URBs */ | |
180 | if (urb == gspca_dev->urb[1]) | |
181 | urb0 = gspca_dev->urb[0]; | |
182 | else | |
183 | urb0 = gspca_dev->urb[2]; | |
184 | for (i = 0; i < urb->number_of_packets; i++) { | |
185 | ||
186 | /* check the packet status and length */ | |
187 | if (urb0->iso_frame_desc[i].actual_length != SD_PKT_SZ | |
188 | || urb->iso_frame_desc[i].actual_length != SD_PKT_SZ) { | |
c93396e1 | 189 | PERR("ISOC bad lengths %d / %d", |
0a71d9ce JFM |
190 | urb0->iso_frame_desc[i].actual_length, |
191 | urb->iso_frame_desc[i].actual_length); | |
192 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
193 | continue; | |
194 | } | |
195 | st = urb0->iso_frame_desc[i].status; | |
196 | if (st == 0) | |
197 | st = urb->iso_frame_desc[i].status; | |
198 | if (st) { | |
133a9fe9 | 199 | pr_err("ISOC data error: [%d] status=%d\n", |
0a71d9ce JFM |
200 | i, st); |
201 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
202 | continue; | |
203 | } | |
204 | ||
205 | /* | |
206 | * The images are received in URBs of different endpoints | |
207 | * (0x83 and 0x82). | |
208 | * Image pieces in URBs of ep 0x83 are continuated in URBs of | |
209 | * ep 0x82 of the same index. | |
210 | * The packets in the URBs of endpoint 0x83 start with: | |
211 | * - 80 ba/bb 00 00 = start of image followed by 'ff d8' | |
212 | * - 04 ba/bb oo oo = image piece | |
213 | * where 'oo oo' is the image offset | |
214 | (not cheked) | |
215 | * - (other -> bad frame) | |
216 | * The images are JPEG encoded with full header and | |
217 | * normal ff escape. | |
218 | * The end of image ('ff d9') may occur in any URB. | |
219 | * (not cheked) | |
220 | */ | |
221 | data = (u8 *) urb0->transfer_buffer | |
222 | + urb0->iso_frame_desc[i].offset; | |
223 | if (data[0] == 0x80 && (data[1] & 0xfe) == 0xba) { | |
224 | ||
225 | /* new image */ | |
226 | gspca_frame_add(gspca_dev, LAST_PACKET, | |
227 | NULL, 0); | |
228 | gspca_frame_add(gspca_dev, FIRST_PACKET, | |
229 | data + 4, SD_PKT_SZ - 4); | |
230 | } else if (data[0] == 0x04 && (data[1] & 0xfe) == 0xba) { | |
231 | gspca_frame_add(gspca_dev, INTER_PACKET, | |
232 | data + 4, SD_PKT_SZ - 4); | |
233 | } else { | |
234 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
235 | continue; | |
236 | } | |
237 | data = (u8 *) urb->transfer_buffer | |
238 | + urb->iso_frame_desc[i].offset; | |
239 | gspca_frame_add(gspca_dev, INTER_PACKET, | |
240 | data, SD_PKT_SZ); | |
241 | } | |
242 | ||
243 | /* resubmit the URBs */ | |
244 | st = usb_submit_urb(urb0, GFP_ATOMIC); | |
245 | if (st < 0) | |
133a9fe9 | 246 | pr_err("usb_submit_urb(0) ret %d\n", st); |
0a71d9ce JFM |
247 | st = usb_submit_urb(urb, GFP_ATOMIC); |
248 | if (st < 0) | |
133a9fe9 | 249 | pr_err("usb_submit_urb() ret %d\n", st); |
0a71d9ce JFM |
250 | } |
251 | ||
252 | /* sub-driver description */ | |
253 | static const struct sd_desc sd_desc = { | |
254 | .name = MODULE_NAME, | |
0a71d9ce JFM |
255 | .config = sd_config, |
256 | .init = sd_init, | |
0a71d9ce JFM |
257 | .start = sd_start, |
258 | .stopN = sd_stopN, | |
259 | .pkt_scan = sd_pkt_scan, | |
260 | }; | |
261 | ||
262 | /* -- module initialisation -- */ | |
95c967c1 | 263 | static const struct usb_device_id device_table[] = { |
0a71d9ce JFM |
264 | {USB_DEVICE(0x04a5, 0x3035)}, |
265 | {} | |
266 | }; | |
267 | MODULE_DEVICE_TABLE(usb, device_table); | |
268 | ||
269 | /* -- device connect -- */ | |
270 | static int sd_probe(struct usb_interface *intf, | |
271 | const struct usb_device_id *id) | |
272 | { | |
273 | return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), | |
274 | THIS_MODULE); | |
275 | } | |
276 | ||
277 | static struct usb_driver sd_driver = { | |
278 | .name = MODULE_NAME, | |
279 | .id_table = device_table, | |
280 | .probe = sd_probe, | |
281 | .disconnect = gspca_disconnect, | |
282 | #ifdef CONFIG_PM | |
283 | .suspend = gspca_suspend, | |
284 | .resume = gspca_resume, | |
8bb58964 | 285 | .reset_resume = gspca_resume, |
0a71d9ce JFM |
286 | #endif |
287 | }; | |
288 | ||
ecb3b2b3 | 289 | module_usb_driver(sd_driver); |