1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 // SPDX-License-Identifier: GPL-2.0-or-later /* * Ethernet interface part of the LG VL600 LTE modem (4G dongle) * * Copyright (C) 2011 Intel Corporation * Author: Andrzej Zaborowski <balrogg@gmail.com> */ #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/mii.h> #include <linux/usb.h> #include <linux/usb/cdc.h> #include <linux/usb/usbnet.h> #include <linux/if_ether.h> #include <linux/if_arp.h> #include <linux/inetdevice.h> #include <linux/module.h> /* * The device has a CDC ACM port for modem control (it claims to be * CDC ACM anyway) and a CDC Ethernet port for actual network data. * It will however ignore data on both ports that is not encapsulated * in a specific way, any data returned is also encapsulated the same * way. The headers don't seem to follow any popular standard. * * This driver adds and strips these headers from the ethernet frames * sent/received from the CDC Ethernet port. The proprietary header * replaces the standard ethernet header in a packet so only actual * ethernet frames are allowed. The headers allow some form of * multiplexing by using non standard values of the .h_proto field. * Windows/Mac drivers do send a couple of such frames to the device * during initialisation, with protocol set to 0x0906 or 0x0b06 and (what * seems to be) a flag in the .dummy_flags. This doesn't seem necessary * for modem operation but can possibly be used for GPS or other functions. */ struct vl600_frame_hdr { __le32 len; __le32 serial; __le32 pkt_cnt; __le32 dummy_flags; __le32 dummy; __le32 magic; } __attribute__((packed)); struct vl600_pkt_hdr { __le32 dummy[2]; __le32 len; __be16 h_proto; } __attribute__((packed)); struct vl600_state { struct sk_buff *current_rx_buf; }; static int vl600_bind(struct usbnet *dev, struct usb_interface *intf) { int ret; struct vl600_state *s = kzalloc(sizeof(struct vl600_state), GFP_KERNEL); if (!s) return -ENOMEM; ret = usbnet_cdc_bind(dev, intf); if (ret) { kfree(s); return ret; } dev->driver_priv = s; /* ARP packets don't go through, but they're also of no use. The * subnet has only two hosts anyway: us and the gateway / DHCP * server (probably simulated by modem firmware or network operator) * whose address changes every time we connect to the intarwebz and * who doesn't bother answering ARP requests either. So hardware * addresses have no meaning, the destination and the source of every * packet depend only on whether it is on the IN or OUT endpoint. */ dev->net->flags |= IFF_NOARP; /* IPv6 NDP relies on multicast. Enable it by default. */ dev->net->flags |= IFF_MULTICAST; return ret; } static void vl600_unbind(struct usbnet *dev, struct usb_interface *intf) { struct vl600_state *s = dev->driver_priv; dev_kfree_skb(s->current_rx_buf); kfree(s); return usbnet_cdc_unbind(dev, intf); } static int vl600_rx_fixup(struct usbnet *dev, struct sk_buff *skb) { struct vl600_frame_hdr *frame; struct vl600_pkt_hdr *packet; struct ethhdr *ethhdr; int packet_len, count; struct sk_buff *buf = skb; struct sk_buff *clone; struct vl600_state *s = dev->driver_priv; /* Frame lengths are generally 4B multiplies but every couple of * hours there's an odd number of bytes sized yet correct frame, * so don't require this. */ /* Allow a packet (or multiple packets batched together) to be * split across many frames. We don't allow a new batch to * begin in the same frame another one is ending however, and no * leading or trailing pad bytes. */ if (s->current_rx_buf) { frame = (struct vl600_frame_hdr *) s->current_rx_buf->data; if (skb->len + s->current_rx_buf->len > le32_to_cpup(&frame->len)) { netif_err(dev, ifup, dev->net, "Fragment too long\n"); dev->net->stats.rx_length_errors++; goto error; } buf = s->current_rx_buf; skb_put_data(buf, skb->data, skb->len); } else if (skb->len < 4) { netif_err(dev, ifup, dev->net, "Frame too short\n"); dev->net->stats.rx_length_errors++; goto error; } frame = (struct vl600_frame_hdr *) buf->data; /* Yes, check that frame->magic == 0x53544448 (or 0x44544d48), * otherwise we may run out of memory w/a bad packet */ if (ntohl(frame->magic) != 0x53544448 && ntohl(frame->magic) != 0x44544d48) goto error; if (buf->len < sizeof(*frame) || buf->len != le32_to_cpup(&frame->len)) { /* Save this fragment for later assembly */ if (s->current_rx_buf) return 0; s->current_rx_buf = skb_copy_expand(skb, 0, le32_to_cpup(&frame->len), GFP_ATOMIC); if (!s->current_rx_buf) dev->net->stats.rx_errors++; return 0; } count = le32_to_cpup(&frame->pkt_cnt); skb_pull(buf, sizeof(*frame)); while (count--) { if (buf->len < sizeof(*packet)) { netif_err(dev, ifup, dev->net, "Packet too short\n"); goto error; } packet = (struct vl600_pkt_hdr *) buf->data; packet_len = sizeof(*packet) + le32_to_cpup(&packet->len); if (packet_len > buf->len) { netif_err(dev, ifup, dev->net, "Bad packet length stored in header\n"); goto error; } /* Packet header is same size as the ethernet header * (sizeof(*packet) == sizeof(*ethhdr)), additionally * the h_proto field is in the same place so we just leave it * alone and fill in the remaining fields. */ ethhdr = (struct ethhdr *) skb->data; if (be16_to_cpup(&ethhdr->h_proto) == ETH_P_ARP && buf->len > 0x26) { /* Copy the addresses from packet contents */ memcpy(ethhdr->h_source, &buf->data[sizeof(*ethhdr) + 0x8], ETH_ALEN); memcpy(ethhdr->h_dest, &buf->data[sizeof(*ethhdr) + 0x12], ETH_ALEN); } else { eth_zero_addr(ethhdr->h_source); memcpy(ethhdr->h_dest, dev->net->dev_addr, ETH_ALEN); /* Inbound IPv6 packets have an IPv4 ethertype (0x800) * for some reason. Peek at the L3 header to check * for IPv6 packets, and set the ethertype to IPv6 * (0x86dd) so Linux can understand it. */ if ((buf->data[sizeof(*ethhdr)] & 0xf0) == 0x60) ethhdr->h_proto = htons(ETH_P_IPV6); } if (count) { /* Not the last packet in this batch */ clone = skb_clone(buf, GFP_ATOMIC); if (!clone) goto error; skb_trim(clone, packet_len); usbnet_skb_return(dev, clone); skb_pull(buf, (packet_len + 3) & ~3); } else { skb_trim(buf, packet_len); if (s->current_rx_buf) { usbnet_skb_return(dev, buf); s->current_rx_buf = NULL; return 0; } return 1; } } error: if (s->current_rx_buf) { dev_kfree_skb_any(s->current_rx_buf); s->current_rx_buf = NULL; } dev->net->stats.rx_errors++; return 0; } static struct sk_buff *vl600_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) { struct sk_buff *ret; struct vl600_frame_hdr *frame; struct vl600_pkt_hdr *packet; static uint32_t serial = 1; int orig_len = skb->len - sizeof(struct ethhdr); int full_len = (skb->len + sizeof(struct vl600_frame_hdr) + 3) & ~3; frame = (struct vl600_frame_hdr *) skb->data; if (skb->len > sizeof(*frame) && skb->len == le32_to_cpup(&frame->len)) return skb; /* Already encapsulated? */ if (skb->len < sizeof(struct ethhdr)) /* Drop, device can only deal with ethernet packets */ return NULL; if (!skb_cloned(skb)) { int headroom = skb_headroom(skb); int tailroom = skb_tailroom(skb); if (tailroom >= full_len - skb->len - sizeof(*frame) && headroom >= sizeof(*frame)) /* There's enough head and tail room */ goto encapsulate; if (headroom + tailroom + skb->len >= full_len) { /* There's enough total room, just readjust */ skb->data = memmove(skb->head + sizeof(*frame), skb->data, skb->len); skb_set_tail_pointer(skb, skb->len); goto encapsulate; } } /* Alloc a new skb with the required size */ ret = skb_copy_expand(skb, sizeof(struct vl600_frame_hdr), full_len - skb->len - sizeof(struct vl600_frame_hdr), flags); dev_kfree_skb_any(skb); if (!ret) return ret; skb = ret; encapsulate: /* Packet header is same size as ethernet packet header * (sizeof(*packet) == sizeof(struct ethhdr)), additionally the * h_proto field is in the same place so we just leave it alone and * overwrite the remaining fields. */ packet = (struct vl600_pkt_hdr *) skb->data; /* The VL600 wants IPv6 packets to have an IPv4 ethertype * Since this modem only supports IPv4 and IPv6, just set all * frames to 0x0800 (ETH_P_IP) */ packet->h_proto = htons(ETH_P_IP); memset(&packet->dummy, 0, sizeof(packet->dummy)); packet->len = cpu_to_le32(orig_len); frame = skb_push(skb, sizeof(*frame)); memset(frame, 0, sizeof(*frame)); frame->len = cpu_to_le32(full_len); frame->serial = cpu_to_le32(serial++); frame->pkt_cnt = cpu_to_le32(1); if (skb->len < full_len) /* Pad */ skb_put(skb, full_len - skb->len); return skb; } static const struct driver_info vl600_info = { .description = "LG VL600 modem", .flags = FLAG_RX_ASSEMBLE | FLAG_WWAN, .bind = vl600_bind, .unbind = vl600_unbind, .status = usbnet_cdc_status, .rx_fixup = vl600_rx_fixup, .tx_fixup = vl600_tx_fixup, }; static const struct usb_device_id products[] = { { USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE), .driver_info = (unsigned long) &vl600_info, }, {}, /* End */ }; MODULE_DEVICE_TABLE(usb, products); static struct usb_driver lg_vl600_driver = { .name = "lg-vl600", .id_table = products, .probe = usbnet_probe, .disconnect = usbnet_disconnect, .suspend = usbnet_suspend, .resume = usbnet_resume, .disable_hub_initiated_lpm = 1, }; module_usb_driver(lg_vl600_driver); MODULE_AUTHOR("Anrzej Zaborowski"); MODULE_DESCRIPTION("LG-VL600 modem's ethernet link"); MODULE_LICENSE("GPL");
1 1 1 1 1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 // SPDX-License-Identifier: GPL-2.0-or-later /* * spca1528 subdriver * * Copyright (C) 2010-2011 Jean-Francois Moine (http://moinejf.free.fr) */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #define MODULE_NAME "spca1528" #include "gspca.h" #include "jpeg.h" MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); MODULE_DESCRIPTION("SPCA1528 USB Camera Driver"); MODULE_LICENSE("GPL"); /* specific webcam descriptor */ struct sd { struct gspca_dev gspca_dev; /* !! must be the first item */ u8 pkt_seq; u8 jpeg_hdr[JPEG_HDR_SZ]; }; static const struct v4l2_pix_format vga_mode[] = { /* (does not work correctly) {176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, .bytesperline = 176, .sizeimage = 176 * 144 * 5 / 8 + 590, .colorspace = V4L2_COLORSPACE_JPEG, .priv = 3}, */ {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, .bytesperline = 320, .sizeimage = 320 * 240 * 4 / 8 + 590, .colorspace = V4L2_COLORSPACE_JPEG, .priv = 2}, {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, .bytesperline = 640, .sizeimage = 640 * 480 * 3 / 8 + 590, .colorspace = V4L2_COLORSPACE_JPEG, .priv = 1}, }; /* read <len> bytes to gspca usb_buf */ static void reg_r(struct gspca_dev *gspca_dev, u8 req, u16 index, int len) { #if USB_BUF_SZ < 64 #error "USB buffer too small" #endif struct usb_device *dev = gspca_dev->dev; int ret; if (gspca_dev->usb_err < 0) return; ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), req, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, /* value */ index, gspca_dev->usb_buf, len, 500); gspca_dbg(gspca_dev, D_USBI, "GET %02x 0000 %04x %02x\n", req, index, gspca_dev->usb_buf[0]); if (ret < 0) { pr_err("reg_r err %d\n", ret); gspca_dev->usb_err = ret; /* * Make sure the buffer is zeroed to avoid uninitialized * values. */ memset(gspca_dev->usb_buf, 0, USB_BUF_SZ); } } static void reg_w(struct gspca_dev *gspca_dev, u8 req, u16 value, u16 index) { struct usb_device *dev = gspca_dev->dev; int ret; if (gspca_dev->usb_err < 0) return; gspca_dbg(gspca_dev, D_USBO, "SET %02x %04x %04x\n", req, value, index); ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), req, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, NULL, 0, 500); if (ret < 0) { pr_err("reg_w err %d\n", ret); gspca_dev->usb_err = ret; } } static void reg_wb(struct gspca_dev *gspca_dev, u8 req, u16 value, u16 index, u8 byte) { struct usb_device *dev = gspca_dev->dev; int ret; if (gspca_dev->usb_err < 0) return; gspca_dbg(gspca_dev, D_USBO, "SET %02x %04x %04x %02x\n", req, value, index, byte); gspca_dev->usb_buf[0] = byte; ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), req, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, gspca_dev->usb_buf, 1, 500); if (ret < 0) { pr_err("reg_w err %d\n", ret); gspca_dev->usb_err = ret; } } static void wait_status_0(struct gspca_dev *gspca_dev) { int i, w; i = 16; w = 0; do { reg_r(gspca_dev, 0x21, 0x0000, 1); if (gspca_dev->usb_buf[0] == 0) return; w += 15; msleep(w); } while (--i > 0); gspca_err(gspca_dev, "wait_status_0 timeout\n"); gspca_dev->usb_err = -ETIME; } static void wait_status_1(struct gspca_dev *gspca_dev) { int i; i = 10; do { reg_r(gspca_dev, 0x21, 0x0001, 1); msleep(10); if (gspca_dev->usb_buf[0] == 1) { reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00); reg_r(gspca_dev, 0x21, 0x0001, 1); return; } } while (--i > 0); gspca_err(gspca_dev, "wait_status_1 timeout\n"); gspca_dev->usb_err = -ETIME; } static void setbrightness(struct gspca_dev *gspca_dev, s32 val) { reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val); } static void setcontrast(struct gspca_dev *gspca_dev, s32 val) { reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val); } static void sethue(struct gspca_dev *gspca_dev, s32 val) { reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val); } static void setcolor(struct gspca_dev *gspca_dev, s32 val) { reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val); } static void setsharpness(struct gspca_dev *gspca_dev, s32 val) { reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, val); } /* this function is called at probe time */ static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) { gspca_dev->cam.cam_mode = vga_mode; gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode); gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */ /*fixme: 256 in ms-win traces*/ return 0; } /* this function is called at probe and resume time */ static int sd_init(struct gspca_dev *gspca_dev) { reg_w(gspca_dev, 0x00, 0x0001, 0x2067); reg_w(gspca_dev, 0x00, 0x00d0, 0x206b); reg_w(gspca_dev, 0x00, 0x0000, 0x206c); reg_w(gspca_dev, 0x00, 0x0001, 0x2069); msleep(8); reg_w(gspca_dev, 0x00, 0x00c0, 0x206b); reg_w(gspca_dev, 0x00, 0x0000, 0x206c); reg_w(gspca_dev, 0x00, 0x0001, 0x2069); reg_r(gspca_dev, 0x20, 0x0000, 1); reg_r(gspca_dev, 0x20, 0x0000, 5); reg_r(gspca_dev, 0x23, 0x0000, 64); gspca_dbg(gspca_dev, D_PROBE, "%s%s\n", &gspca_dev->usb_buf[0x1c], &gspca_dev->usb_buf[0x30]); reg_r(gspca_dev, 0x23, 0x0001, 64); return gspca_dev->usb_err; } /* function called at start time before URB creation */ static int sd_isoc_init(struct gspca_dev *gspca_dev) { u8 mode; reg_r(gspca_dev, 0x00, 0x2520, 1); wait_status_0(gspca_dev); reg_w(gspca_dev, 0xc5, 0x0003, 0x0000); wait_status_1(gspca_dev); wait_status_0(gspca_dev); mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv; reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode); reg_r(gspca_dev, 0x25, 0x0004, 1); reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06); /* 420 */ reg_r(gspca_dev, 0x27, 0x0000, 1); /* not useful.. gspca_dev->alt = 4; * use alternate setting 3 */ return gspca_dev->usb_err; } /* -- start the camera -- */ static int sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; /* initialize the JPEG header */ jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height, gspca_dev->pixfmt.width, 0x22); /* JPEG 411 */ /* the JPEG quality shall be 85% */ jpeg_set_qual(sd->jpeg_hdr, 85); reg_r(gspca_dev, 0x00, 0x2520, 1); msleep(8); /* start the capture */ wait_status_0(gspca_dev); reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* start request */ wait_status_1(gspca_dev); wait_status_0(gspca_dev); msleep(200); sd->pkt_seq = 0; return gspca_dev->usb_err; } static void sd_stopN(struct gspca_dev *gspca_dev) { /* stop the capture */ wait_status_0(gspca_dev); reg_w(gspca_dev, 0x31, 0x0000, 0x0000); /* stop request */ wait_status_1(gspca_dev); wait_status_0(gspca_dev); } /* move a packet adding 0x00 after 0xff */ static void add_packet(struct gspca_dev *gspca_dev, u8 *data, int len) { int i; i = 0; do { if (data[i] == 0xff) { gspca_frame_add(gspca_dev, INTER_PACKET, data, i + 1); len -= i; data += i; *data = 0x00; i = 0; } } while (++i < len); gspca_frame_add(gspca_dev, INTER_PACKET, data, len); } static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, /* isoc packet */ int len) /* iso packet length */ { struct sd *sd = (struct sd *) gspca_dev; static const u8 ffd9[] = {0xff, 0xd9}; /* image packets start with: * 02 8n * with <n> bit: * 0x01: even (0) / odd (1) image * 0x02: end of image when set */ if (len < 3) return; /* empty packet */ if (*data == 0x02) { if (data[1] & 0x02) { sd->pkt_seq = !(data[1] & 1); add_packet(gspca_dev, data + 2, len - 2); gspca_frame_add(gspca_dev, LAST_PACKET, ffd9, 2); return; } if ((data[1] & 1) != sd->pkt_seq) goto err; if (gspca_dev->last_packet_type == LAST_PACKET) gspca_frame_add(gspca_dev, FIRST_PACKET, sd->jpeg_hdr, JPEG_HDR_SZ); add_packet(gspca_dev, data + 2, len - 2); return; } err: gspca_dev->last_packet_type = DISCARD_PACKET; } static int sd_s_ctrl(struct v4l2_ctrl *ctrl) { struct gspca_dev *gspca_dev = container_of(ctrl->handler, struct gspca_dev, ctrl_handler); gspca_dev->usb_err = 0; if (!gspca_dev->streaming) return 0; switch (ctrl->id) { case V4L2_CID_BRIGHTNESS: setbrightness(gspca_dev, ctrl->val); break; case V4L2_CID_CONTRAST: setcontrast(gspca_dev, ctrl->val); break; case V4L2_CID_HUE: sethue(gspca_dev, ctrl->val); break; case V4L2_CID_SATURATION: setcolor(gspca_dev, ctrl->val); break; case V4L2_CID_SHARPNESS: setsharpness(gspca_dev, ctrl->val); break; } return gspca_dev->usb_err; } static const struct v4l2_ctrl_ops sd_ctrl_ops = { .s_ctrl = sd_s_ctrl, }; static int sd_init_controls(struct gspca_dev *gspca_dev) { struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; gspca_dev->vdev.ctrl_handler = hdl; v4l2_ctrl_handler_init(hdl, 5); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_CONTRAST, 0, 8, 1, 1); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_HUE, 0, 255, 1, 0); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_SATURATION, 0, 8, 1, 1); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_SHARPNESS, 0, 255, 1, 0); if (hdl->error) { pr_err("Could not initialize controls\n"); return hdl->error; } return 0; } /* sub-driver description */ static const struct sd_desc sd_desc = { .name = MODULE_NAME, .config = sd_config, .init = sd_init, .init_controls = sd_init_controls, .isoc_init = sd_isoc_init, .start = sd_start, .stopN = sd_stopN, .pkt_scan = sd_pkt_scan, }; /* -- module initialisation -- */ static const struct usb_device_id device_table[] = { {USB_DEVICE(0x04fc, 0x1528)}, {} }; MODULE_DEVICE_TABLE(usb, device_table); /* -- device connect -- */ static int sd_probe(struct usb_interface *intf, const struct usb_device_id *id) { /* the video interface for isochronous transfer is 1 */ if (intf->cur_altsetting->desc.bInterfaceNumber != 1) return -ENODEV; return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd), THIS_MODULE); } static struct usb_driver sd_driver = { .name = MODULE_NAME, .id_table = device_table, .probe = sd_probe, .disconnect = gspca_disconnect, #ifdef CONFIG_PM .suspend = gspca_suspend, .resume = gspca_resume, .reset_resume = gspca_resume, #endif }; module_usb_driver(sd_driver);
128 128 128 128 128 128 128 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 // SPDX-License-Identifier: LGPL-2.0+ /* * Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. * This file is part of the GNU C Library. * Contributed by Paul Eggert (eggert@twinsun.com). * * The GNU C Library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * The GNU C Library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with the GNU C Library; see the file COPYING.LIB. If not, * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Converts the calendar time to broken-down time representation * * 2009-7-14: * Moved from glibc-2.6 to kernel by Zhaolei<zhaolei@cn.fujitsu.com> * 2021-06-02: * Reimplemented by Cassio Neri <cassio.neri@gmail.com> */ #include <linux/time.h> #include <linux/module.h> #include <linux/kernel.h> #define SECS_PER_HOUR (60 * 60) #define SECS_PER_DAY (SECS_PER_HOUR * 24) /** * time64_to_tm - converts the calendar time to local broken-down time * * @totalsecs: the number of seconds elapsed since 00:00:00 on January 1, 1970, * Coordinated Universal Time (UTC). * @offset: offset seconds adding to totalsecs. * @result: pointer to struct tm variable to receive broken-down time */ void time64_to_tm(time64_t totalsecs, int offset, struct tm *result) { u32 u32tmp, day_of_century, year_of_century, day_of_year, month, day; u64 u64tmp, udays, century, year; bool is_Jan_or_Feb, is_leap_year; long days, rem; int remainder; days = div_s64_rem(totalsecs, SECS_PER_DAY, &remainder); rem = remainder; rem += offset; while (rem < 0) { rem += SECS_PER_DAY; --days; } while (rem >= SECS_PER_DAY) { rem -= SECS_PER_DAY; ++days; } result->tm_hour = rem / SECS_PER_HOUR; rem %= SECS_PER_HOUR; result->tm_min = rem / 60; result->tm_sec = rem % 60; /* January 1, 1970 was a Thursday. */ result->tm_wday = (4 + days) % 7; if (result->tm_wday < 0) result->tm_wday += 7; /* * The following algorithm is, basically, Proposition 6.3 of Neri * and Schneider [1]. In a few words: it works on the computational * (fictitious) calendar where the year starts in March, month = 2 * (*), and finishes in February, month = 13. This calendar is * mathematically convenient because the day of the year does not * depend on whether the year is leap or not. For instance: * * March 1st 0-th day of the year; * ... * April 1st 31-st day of the year; * ... * January 1st 306-th day of the year; (Important!) * ... * February 28th 364-th day of the year; * February 29th 365-th day of the year (if it exists). * * After having worked out the date in the computational calendar * (using just arithmetics) it's easy to convert it to the * corresponding date in the Gregorian calendar. * * [1] "Euclidean Affine Functions and Applications to Calendar * Algorithms". https://arxiv.org/abs/2102.06959 * * (*) The numbering of months follows tm more closely and thus, * is slightly different from [1]. */ udays = ((u64) days) + 2305843009213814918ULL; u64tmp = 4 * udays + 3; century = div64_u64_rem(u64tmp, 146097, &u64tmp); day_of_century = (u32) (u64tmp / 4); u32tmp = 4 * day_of_century + 3; u64tmp = 2939745ULL * u32tmp; year_of_century = upper_32_bits(u64tmp); day_of_year = lower_32_bits(u64tmp) / 2939745 / 4; year = 100 * century + year_of_century; is_leap_year = year_of_century ? !(year_of_century % 4) : !(century % 4); u32tmp = 2141 * day_of_year + 132377; month = u32tmp >> 16; day = ((u16) u32tmp) / 2141; /* * Recall that January 1st is the 306-th day of the year in the * computational (not Gregorian) calendar. */ is_Jan_or_Feb = day_of_year >= 306; /* Convert to the Gregorian calendar and adjust to Unix time. */ year = year + is_Jan_or_Feb - 6313183731940000ULL; month = is_Jan_or_Feb ? month - 12 : month; day = day + 1; day_of_year += is_Jan_or_Feb ? -306 : 31 + 28 + is_leap_year; /* Convert to tm's format. */ result->tm_year = (long) (year - 1900); result->tm_mon = (int) month; result->tm_mday = (int) day; result->tm_yday = (int) day_of_year; } EXPORT_SYMBOL(time64_to_tm);
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 // SPDX-License-Identifier: GPL-2.0-or-later /* * Directory notifications for Linux. * * Copyright (C) 2000,2001,2002 Stephen Rothwell * * Copyright (C) 2009 Eric Paris <Red Hat Inc> * dnotify was largly rewritten to use the new fsnotify infrastructure */ #include <linux/fs.h> #include <linux/module.h> #include <linux/sched.h> #include <linux/sched/signal.h> #include <linux/dnotify.h> #include <linux/init.h> #include <linux/security.h> #include <linux/spinlock.h> #include <linux/slab.h> #include <linux/fdtable.h> #include <linux/fsnotify_backend.h> int dir_notify_enable __read_mostly = 1; static struct kmem_cache *dnotify_struct_cache __read_mostly; static struct kmem_cache *dnotify_mark_cache __read_mostly; static struct fsnotify_group *dnotify_group __read_mostly; /* * dnotify will attach one of these to each inode (i_fsnotify_marks) which * is being watched by dnotify. If multiple userspace applications are watching * the same directory with dnotify their information is chained in dn */ struct dnotify_mark { struct fsnotify_mark fsn_mark; struct dnotify_struct *dn; }; /* * When a process starts or stops watching an inode the set of events which * dnotify cares about for that inode may change. This function runs the * list of everything receiving dnotify events about this directory and calculates * the set of all those events. After it updates what dnotify is interested in * it calls the fsnotify function so it can update the set of all events relevant * to this inode. */ static void dnotify_recalc_inode_mask(struct fsnotify_mark *fsn_mark) { __u32 new_mask = 0; struct dnotify_struct *dn; struct dnotify_mark *dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark); assert_spin_locked(&fsn_mark->lock); for (dn = dn_mark->dn; dn != NULL; dn = dn->dn_next) new_mask |= (dn->dn_mask & ~FS_DN_MULTISHOT); if (fsn_mark->mask == new_mask) return; fsn_mark->mask = new_mask; fsnotify_recalc_mask(fsn_mark->connector); } /* * Mains fsnotify call where events are delivered to dnotify. * Find the dnotify mark on the relevant inode, run the list of dnotify structs * on that mark and determine which of them has expressed interest in receiving * events of this type. When found send the correct process and signal and * destroy the dnotify struct if it was not registered to receive multiple * events. */ static int dnotify_handle_event(struct fsnotify_mark *inode_mark, u32 mask, struct inode *inode, struct inode *dir, const struct qstr *name, u32 cookie) { struct dnotify_mark *dn_mark; struct dnotify_struct *dn; struct dnotify_struct **prev; struct fown_struct *fown; __u32 test_mask = mask & ~FS_EVENT_ON_CHILD; /* not a dir, dnotify doesn't care */ if (!dir && !(mask & FS_ISDIR)) return 0; dn_mark = container_of(inode_mark, struct dnotify_mark, fsn_mark); spin_lock(&inode_mark->lock); prev = &dn_mark->dn; while ((dn = *prev) != NULL) { if ((dn->dn_mask & test_mask) == 0) { prev = &dn->dn_next; continue; } fown = &dn->dn_filp->f_owner; send_sigio(fown, dn->dn_fd, POLL_MSG); if (dn->dn_mask & FS_DN_MULTISHOT) prev = &dn->dn_next; else { *prev = dn->dn_next; kmem_cache_free(dnotify_struct_cache, dn); dnotify_recalc_inode_mask(inode_mark); } } spin_unlock(&inode_mark->lock); return 0; } static void dnotify_free_mark(struct fsnotify_mark *fsn_mark) { struct dnotify_mark *dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark); BUG_ON(dn_mark->dn); kmem_cache_free(dnotify_mark_cache, dn_mark); } static const struct fsnotify_ops dnotify_fsnotify_ops = { .handle_inode_event = dnotify_handle_event, .free_mark = dnotify_free_mark, }; /* * Called every time a file is closed. Looks first for a dnotify mark on the * inode. If one is found run all of the ->dn structures attached to that * mark for one relevant to this process closing the file and remove that * dnotify_struct. If that was the last dnotify_struct also remove the * fsnotify_mark. */ void dnotify_flush(struct file *filp, fl_owner_t id) { struct fsnotify_mark *fsn_mark; struct dnotify_mark *dn_mark; struct dnotify_struct *dn; struct dnotify_struct **prev; struct inode *inode; bool free = false; inode = file_inode(filp); if (!S_ISDIR(inode->i_mode)) return; fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, dnotify_group); if (!fsn_mark) return; dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark); mutex_lock(&dnotify_group->mark_mutex); spin_lock(&fsn_mark->lock); prev = &dn_mark->dn; while ((dn = *prev) != NULL) { if ((dn->dn_owner == id) && (dn->dn_filp == filp)) { *prev = dn->dn_next; kmem_cache_free(dnotify_struct_cache, dn); dnotify_recalc_inode_mask(fsn_mark); break; } prev = &dn->dn_next; } spin_unlock(&fsn_mark->lock); /* nothing else could have found us thanks to the dnotify_groups mark_mutex */ if (dn_mark->dn == NULL) { fsnotify_detach_mark(fsn_mark); free = true; } mutex_unlock(&dnotify_group->mark_mutex); if (free) fsnotify_free_mark(fsn_mark); fsnotify_put_mark(fsn_mark); } /* this conversion is done only at watch creation */ static __u32 convert_arg(unsigned long arg) { __u32 new_mask = FS_EVENT_ON_CHILD; if (arg & DN_MULTISHOT) new_mask |= FS_DN_MULTISHOT; if (arg & DN_DELETE) new_mask |= (FS_DELETE | FS_MOVED_FROM); if (arg & DN_MODIFY) new_mask |= FS_MODIFY; if (arg & DN_ACCESS) new_mask |= FS_ACCESS; if (arg & DN_ATTRIB) new_mask |= FS_ATTRIB; if (arg & DN_RENAME) new_mask |= FS_DN_RENAME; if (arg & DN_CREATE) new_mask |= (FS_CREATE | FS_MOVED_TO); return new_mask; } /* * If multiple processes watch the same inode with dnotify there is only one * dnotify mark in inode->i_fsnotify_marks but we chain a dnotify_struct * onto that mark. This function either attaches the new dnotify_struct onto * that list, or it |= the mask onto an existing dnofiy_struct. */ static int attach_dn(struct dnotify_struct *dn, struct dnotify_mark *dn_mark, fl_owner_t id, int fd, struct file *filp, __u32 mask) { struct dnotify_struct *odn; odn = dn_mark->dn; while (odn != NULL) { /* adding more events to existing dnofiy_struct? */ if ((odn->dn_owner == id) && (odn->dn_filp == filp)) { odn->dn_fd = fd; odn->dn_mask |= mask; return -EEXIST; } odn = odn->dn_next; } dn->dn_mask = mask; dn->dn_fd = fd; dn->dn_filp = filp; dn->dn_owner = id; dn->dn_next = dn_mark->dn; dn_mark->dn = dn; return 0; } /* * When a process calls fcntl to attach a dnotify watch to a directory it ends * up here. Allocate both a mark for fsnotify to add and a dnotify_struct to be * attached to the fsnotify_mark. */ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg) { struct dnotify_mark *new_dn_mark, *dn_mark; struct fsnotify_mark *new_fsn_mark, *fsn_mark; struct dnotify_struct *dn; struct inode *inode; fl_owner_t id = current->files; struct file *f; int destroy = 0, error = 0; __u32 mask; /* we use these to tell if we need to kfree */ new_fsn_mark = NULL; dn = NULL; if (!dir_notify_enable) { error = -EINVAL; goto out_err; } /* a 0 mask means we are explicitly removing the watch */ if ((arg & ~DN_MULTISHOT) == 0) { dnotify_flush(filp, id); error = 0; goto out_err; } /* dnotify only works on directories */ inode = file_inode(filp); if (!S_ISDIR(inode->i_mode)) { error = -ENOTDIR; goto out_err; } /* * convert the userspace DN_* "arg" to the internal FS_* * defined in fsnotify */ mask = convert_arg(arg); error = security_path_notify(&filp->f_path, mask, FSNOTIFY_OBJ_TYPE_INODE); if (error) goto out_err; /* expect most fcntl to add new rather than augment old */ dn = kmem_cache_alloc(dnotify_struct_cache, GFP_KERNEL); if (!dn) { error = -ENOMEM; goto out_err; } /* new fsnotify mark, we expect most fcntl calls to add a new mark */ new_dn_mark = kmem_cache_alloc(dnotify_mark_cache, GFP_KERNEL); if (!new_dn_mark) { error = -ENOMEM; goto out_err; } /* set up the new_fsn_mark and new_dn_mark */ new_fsn_mark = &new_dn_mark->fsn_mark; fsnotify_init_mark(new_fsn_mark, dnotify_group); new_fsn_mark->mask = mask; new_dn_mark->dn = NULL; /* this is needed to prevent the fcntl/close race described below */ mutex_lock(&dnotify_group->mark_mutex); /* add the new_fsn_mark or find an old one. */ fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, dnotify_group); if (fsn_mark) { dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark); spin_lock(&fsn_mark->lock); } else { error = fsnotify_add_inode_mark_locked(new_fsn_mark, inode, 0); if (error) { mutex_unlock(&dnotify_group->mark_mutex); goto out_err; } spin_lock(&new_fsn_mark->lock); fsn_mark = new_fsn_mark; dn_mark = new_dn_mark; /* we used new_fsn_mark, so don't free it */ new_fsn_mark = NULL; } rcu_read_lock(); f = lookup_fd_rcu(fd); rcu_read_unlock(); /* if (f != filp) means that we lost a race and another task/thread * actually closed the fd we are still playing with before we grabbed * the dnotify_groups mark_mutex and fsn_mark->lock. Since closing the * fd is the only time we clean up the marks we need to get our mark * off the list. */ if (f != filp) { /* if we added ourselves, shoot ourselves, it's possible that * the flush actually did shoot this fsn_mark. That's fine too * since multiple calls to destroy_mark is perfectly safe, if * we found a dn_mark already attached to the inode, just sod * off silently as the flush at close time dealt with it. */ if (dn_mark == new_dn_mark) destroy = 1; error = 0; goto out; } __f_setown(filp, task_pid(current), PIDTYPE_TGID, 0); error = attach_dn(dn, dn_mark, id, fd, filp, mask); /* !error means that we attached the dn to the dn_mark, so don't free it */ if (!error) dn = NULL; /* -EEXIST means that we didn't add this new dn and used an old one. * that isn't an error (and the unused dn should be freed) */ else if (error == -EEXIST) error = 0; dnotify_recalc_inode_mask(fsn_mark); out: spin_unlock(&fsn_mark->lock); if (destroy) fsnotify_detach_mark(fsn_mark); mutex_unlock(&dnotify_group->mark_mutex); if (destroy) fsnotify_free_mark(fsn_mark); fsnotify_put_mark(fsn_mark); out_err: if (new_fsn_mark) fsnotify_put_mark(new_fsn_mark); if (dn) kmem_cache_free(dnotify_struct_cache, dn); return error; } static int __init dnotify_init(void) { dnotify_struct_cache = KMEM_CACHE(dnotify_struct, SLAB_PANIC|SLAB_ACCOUNT); dnotify_mark_cache = KMEM_CACHE(dnotify_mark, SLAB_PANIC|SLAB_ACCOUNT); dnotify_group = fsnotify_alloc_group(&dnotify_fsnotify_ops); if (IS_ERR(dnotify_group)) panic("unable to allocate fsnotify group for dnotify\n"); return 0; } module_init(dnotify_init)
2 1 1 1 11 7 7 5 16 5 2 21 21 21 21 21 18 21 107 107 107 107 107 94 18 16 16 16 16 75 75 5 74 88 108 1 89 108 21 21 7 21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 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1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 // SPDX-License-Identifier: GPL-2.0-or-later /* * Main USB camera driver * * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr> * * Camera button input handling by Márton Németh * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #define GSPCA_VERSION "2.14.0" #include <linux/init.h> #include <linux/fs.h> #include <linux/vmalloc.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/string.h> #include <linux/pagemap.h> #include <linux/io.h> #include <asm/page.h> #include <linux/uaccess.h> #include <linux/ktime.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-fh.h> #include <media/v4l2-event.h> #include "gspca.h" #if IS_ENABLED(CONFIG_INPUT) #include <linux/input.h> #include <linux/usb/input.h> #endif /* global values */ #define DEF_NURBS 3 /* default number of URBs */ #if DEF_NURBS > MAX_NURBS #error "DEF_NURBS too big" #endif MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); MODULE_DESCRIPTION("GSPCA USB Camera Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(GSPCA_VERSION); int gspca_debug; EXPORT_SYMBOL(gspca_debug); static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt, __u32 pixfmt, int w, int h) { if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n", txt, pixfmt & 0xff, (pixfmt >> 8) & 0xff, (pixfmt >> 16) & 0xff, pixfmt >> 24, w, h); } else { gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n", txt, pixfmt, w, h); } } /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ #define GSPCA_MEMORY_READ 7 /* * Input and interrupt endpoint handling functions */ #if IS_ENABLED(CONFIG_INPUT) static void int_irq(struct urb *urb) { struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; int ret; ret = urb->status; switch (ret) { case 0: if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, urb->transfer_buffer, urb->actual_length) < 0) { gspca_err(gspca_dev, "Unknown packet received\n"); } break; case -ENOENT: case -ECONNRESET: case -ENODEV: case -ESHUTDOWN: /* Stop is requested either by software or hardware is gone, * keep the ret value non-zero and don't resubmit later. */ break; default: gspca_err(gspca_dev, "URB error %i, resubmitting\n", urb->status); urb->status = 0; ret = 0; } if (ret == 0) { ret = usb_submit_urb(urb, GFP_ATOMIC); if (ret < 0) pr_err("Resubmit URB failed with error %i\n", ret); } } static int gspca_input_connect(struct gspca_dev *dev) { struct input_dev *input_dev; int err = 0; dev->input_dev = NULL; if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { input_dev = input_allocate_device(); if (!input_dev) return -ENOMEM; usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); strlcat(dev->phys, "/input0", sizeof(dev->phys)); input_dev->name = dev->sd_desc->name; input_dev->phys = dev->phys; usb_to_input_id(dev->dev, &input_dev->id); input_dev->evbit[0] = BIT_MASK(EV_KEY); input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); input_dev->dev.parent = &dev->dev->dev; err = input_register_device(input_dev); if (err) { pr_err("Input device registration failed with error %i\n", err); input_dev->dev.parent = NULL; input_free_device(input_dev); } else { dev->input_dev = input_dev; } } return err; } static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, struct usb_endpoint_descriptor *ep) { unsigned int buffer_len; int interval; struct urb *urb; struct usb_device *dev; void *buffer = NULL; int ret = -EINVAL; buffer_len = le16_to_cpu(ep->wMaxPacketSize); interval = ep->bInterval; gspca_dbg(gspca_dev, D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u\n", ep->bEndpointAddress, buffer_len, interval); dev = gspca_dev->dev; urb = usb_alloc_urb(0, GFP_KERNEL); if (!urb) { ret = -ENOMEM; goto error; } buffer = usb_alloc_coherent(dev, buffer_len, GFP_KERNEL, &urb->transfer_dma); if (!buffer) { ret = -ENOMEM; goto error_buffer; } usb_fill_int_urb(urb, dev, usb_rcvintpipe(dev, ep->bEndpointAddress), buffer, buffer_len, int_irq, (void *)gspca_dev, interval); urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; ret = usb_submit_urb(urb, GFP_KERNEL); if (ret < 0) { gspca_err(gspca_dev, "submit int URB failed with error %i\n", ret); goto error_submit; } gspca_dev->int_urb = urb; return ret; error_submit: usb_free_coherent(dev, urb->transfer_buffer_length, urb->transfer_buffer, urb->transfer_dma); error_buffer: usb_free_urb(urb); error: return ret; } static void gspca_input_create_urb(struct gspca_dev *gspca_dev) { struct usb_interface *intf; struct usb_host_interface *intf_desc; struct usb_endpoint_descriptor *ep; int i; if (gspca_dev->sd_desc->int_pkt_scan) { intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); intf_desc = intf->cur_altsetting; for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { ep = &intf_desc->endpoint[i].desc; if (usb_endpoint_dir_in(ep) && usb_endpoint_xfer_int(ep)) { alloc_and_submit_int_urb(gspca_dev, ep); break; } } } } static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) { struct urb *urb; urb = gspca_dev->int_urb; if (urb) { gspca_dev->int_urb = NULL; usb_kill_urb(urb); usb_free_coherent(gspca_dev->dev, urb->transfer_buffer_length, urb->transfer_buffer, urb->transfer_dma); usb_free_urb(urb); } } #else static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) { } static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) { } static inline int gspca_input_connect(struct gspca_dev *dev) { return 0; } #endif /* * fill a video frame from an URB and resubmit */ static void fill_frame(struct gspca_dev *gspca_dev, struct urb *urb) { u8 *data; /* address of data in the iso message */ int i, len, st; cam_pkt_op pkt_scan; if (urb->status != 0) { if (urb->status == -ESHUTDOWN) return; /* disconnection */ #ifdef CONFIG_PM if (gspca_dev->frozen) return; #endif gspca_err(gspca_dev, "urb status: %d\n", urb->status); urb->status = 0; goto resubmit; } pkt_scan = gspca_dev->sd_desc->pkt_scan; for (i = 0; i < urb->number_of_packets; i++) { len = urb->iso_frame_desc[i].actual_length; /* check the packet status and length */ st = urb->iso_frame_desc[i].status; if (st) { gspca_dbg(gspca_dev, D_PACK, "ISOC data error: [%d] len=%d, status=%d\n", i, len, st); gspca_dev->last_packet_type = DISCARD_PACKET; continue; } if (len == 0) { if (gspca_dev->empty_packet == 0) gspca_dev->empty_packet = 1; continue; } /* let the packet be analyzed by the subdriver */ gspca_dbg(gspca_dev, D_PACK, "packet [%d] o:%d l:%d\n", i, urb->iso_frame_desc[i].offset, len); data = (u8 *) urb->transfer_buffer + urb->iso_frame_desc[i].offset; pkt_scan(gspca_dev, data, len); } resubmit: if (!gspca_dev->streaming) return; /* resubmit the URB */ st = usb_submit_urb(urb, GFP_ATOMIC); if (st < 0) pr_err("usb_submit_urb() ret %d\n", st); } /* * ISOC message interrupt from the USB device * * Analyse each packet and call the subdriver for copy to the frame buffer. */ static void isoc_irq(struct urb *urb) { struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; gspca_dbg(gspca_dev, D_PACK, "isoc irq\n"); if (!gspca_dev->streaming) return; fill_frame(gspca_dev, urb); } /* * bulk message interrupt from the USB device */ static void bulk_irq(struct urb *urb) { struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; int st; gspca_dbg(gspca_dev, D_PACK, "bulk irq\n"); if (!gspca_dev->streaming) return; switch (urb->status) { case 0: break; case -ESHUTDOWN: return; /* disconnection */ default: #ifdef CONFIG_PM if (gspca_dev->frozen) return; #endif gspca_err(gspca_dev, "urb status: %d\n", urb->status); urb->status = 0; goto resubmit; } gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n", urb->actual_length); gspca_dev->sd_desc->pkt_scan(gspca_dev, urb->transfer_buffer, urb->actual_length); resubmit: if (!gspca_dev->streaming) return; /* resubmit the URB */ if (gspca_dev->cam.bulk_nurbs != 0) { st = usb_submit_urb(urb, GFP_ATOMIC); if (st < 0) pr_err("usb_submit_urb() ret %d\n", st); } } /* * add data to the current frame * * This function is called by the subdrivers at interrupt level. * * To build a frame, these ones must add * - one FIRST_PACKET * - 0 or many INTER_PACKETs * - one LAST_PACKET * DISCARD_PACKET invalidates the whole frame. */ void gspca_frame_add(struct gspca_dev *gspca_dev, enum gspca_packet_type packet_type, const u8 *data, int len) { struct gspca_buffer *buf; unsigned long flags; gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len); spin_lock_irqsave(&gspca_dev->qlock, flags); buf = list_first_entry_or_null(&gspca_dev->buf_list, typeof(*buf), list); spin_unlock_irqrestore(&gspca_dev->qlock, flags); if (packet_type == FIRST_PACKET) { /* if there is no queued buffer, discard the whole frame */ if (!buf) { gspca_dev->last_packet_type = DISCARD_PACKET; gspca_dev->sequence++; return; } gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); gspca_dev->image_len = 0; } else { switch (gspca_dev->last_packet_type) { case DISCARD_PACKET: if (packet_type == LAST_PACKET) { gspca_dev->last_packet_type = packet_type; gspca_dev->image = NULL; gspca_dev->image_len = 0; } return; case LAST_PACKET: return; } } /* append the packet to the frame buffer */ if (len > 0) { if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) { gspca_err(gspca_dev, "frame overflow %d > %d\n", gspca_dev->image_len + len, PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)); packet_type = DISCARD_PACKET; } else { /* !! image is NULL only when last pkt is LAST or DISCARD if (gspca_dev->image == NULL) { pr_err("gspca_frame_add() image == NULL\n"); return; } */ memcpy(gspca_dev->image + gspca_dev->image_len, data, len); gspca_dev->image_len += len; } } gspca_dev->last_packet_type = p