diff options
author | Hans Verkuil <hverkuil@xs4all.nl> | 2010-12-25 07:27:47 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-12-29 08:17:08 -0200 |
commit | 745da4280f272840976d47afba22ed853f07e1b2 (patch) | |
tree | 16808326f76543f443855b2d3b4990f3389bd49a /drivers/staging/usbvideo | |
parent | 5772dcaa790851ec068afcd0d1f160d801b1126e (diff) |
[media] usbvideo: deprecate the vicam driver
Move usbvideo to staging and mark it deprecated.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/staging/usbvideo')
-rw-r--r-- | drivers/staging/usbvideo/Kconfig | 15 | ||||
-rw-r--r-- | drivers/staging/usbvideo/Makefile | 2 | ||||
-rw-r--r-- | drivers/staging/usbvideo/usbvideo.c | 2230 | ||||
-rw-r--r-- | drivers/staging/usbvideo/usbvideo.h | 395 | ||||
-rw-r--r-- | drivers/staging/usbvideo/vicam.c | 952 |
5 files changed, 3594 insertions, 0 deletions
diff --git a/drivers/staging/usbvideo/Kconfig b/drivers/staging/usbvideo/Kconfig new file mode 100644 index 000000000000..aae863e8a902 --- /dev/null +++ b/drivers/staging/usbvideo/Kconfig @@ -0,0 +1,15 @@ +config VIDEO_USBVIDEO + tristate + +config USB_VICAM + tristate "USB 3com HomeConnect (aka vicam) support (DEPRECATED)" + depends on VIDEO_V4L1 && EXPERIMENTAL + select VIDEO_USBVIDEO + ---help--- + Say Y here if you have 3com homeconnect camera (vicam). + + This driver uses the deprecated V4L1 API and will be removed in + 2.6.39, unless someone converts it to the V4L2 API. + + To compile this driver as a module, choose M here: the + module will be called vicam. diff --git a/drivers/staging/usbvideo/Makefile b/drivers/staging/usbvideo/Makefile new file mode 100644 index 000000000000..3c99a9a2d8d3 --- /dev/null +++ b/drivers/staging/usbvideo/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_VIDEO_USBVIDEO) += usbvideo.o +obj-$(CONFIG_USB_VICAM) += vicam.o diff --git a/drivers/staging/usbvideo/usbvideo.c b/drivers/staging/usbvideo/usbvideo.c new file mode 100644 index 000000000000..f1fcf9744961 --- /dev/null +++ b/drivers/staging/usbvideo/usbvideo.c @@ -0,0 +1,2230 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/vmalloc.h> +#include <linux/init.h> +#include <linux/spinlock.h> + +#include <asm/io.h> + +#include "usbvideo.h" + +#if defined(MAP_NR) +#define virt_to_page(v) MAP_NR(v) /* Kernels 2.2.x */ +#endif + +static int video_nr = -1; +module_param(video_nr, int, 0); + +/* + * Local prototypes. + */ +static void usbvideo_Disconnect(struct usb_interface *intf); +static void usbvideo_CameraRelease(struct uvd *uvd); + +static long usbvideo_v4l_ioctl(struct file *file, + unsigned int cmd, unsigned long arg); +static int usbvideo_v4l_mmap(struct file *file, struct vm_area_struct *vma); +static int usbvideo_v4l_open(struct file *file); +static ssize_t usbvideo_v4l_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos); +static int usbvideo_v4l_close(struct file *file); + +static int usbvideo_StartDataPump(struct uvd *uvd); +static void usbvideo_StopDataPump(struct uvd *uvd); +static int usbvideo_GetFrame(struct uvd *uvd, int frameNum); +static int usbvideo_NewFrame(struct uvd *uvd, int framenum); +static void usbvideo_SoftwareContrastAdjustment(struct uvd *uvd, + struct usbvideo_frame *frame); + +/*******************************/ +/* Memory management functions */ +/*******************************/ +static void *usbvideo_rvmalloc(unsigned long size) +{ + void *mem; + unsigned long adr; + + size = PAGE_ALIGN(size); + mem = vmalloc_32(size); + if (!mem) + return NULL; + + memset(mem, 0, size); /* Clear the ram out, no junk to the user */ + adr = (unsigned long) mem; + while (size > 0) { + SetPageReserved(vmalloc_to_page((void *)adr)); + adr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + return mem; +} + +static void usbvideo_rvfree(void *mem, unsigned long size) +{ + unsigned long adr; + + if (!mem) + return; + + adr = (unsigned long) mem; + while ((long) size > 0) { + ClearPageReserved(vmalloc_to_page((void *)adr)); + adr += PAGE_SIZE; + size -= PAGE_SIZE; + } + vfree(mem); +} + +static void RingQueue_Initialize(struct RingQueue *rq) +{ + assert(rq != NULL); + init_waitqueue_head(&rq->wqh); +} + +static void RingQueue_Allocate(struct RingQueue *rq, int rqLen) +{ + /* Make sure the requested size is a power of 2 and + round up if necessary. This allows index wrapping + using masks rather than modulo */ + + int i = 1; + assert(rq != NULL); + assert(rqLen > 0); + + while(rqLen >> i) + i++; + if(rqLen != 1 << (i-1)) + rqLen = 1 << i; + + rq->length = rqLen; + rq->ri = rq->wi = 0; + rq->queue = usbvideo_rvmalloc(rq->length); + assert(rq->queue != NULL); +} + +static int RingQueue_IsAllocated(const struct RingQueue *rq) +{ + if (rq == NULL) + return 0; + return (rq->queue != NULL) && (rq->length > 0); +} + +static void RingQueue_Free(struct RingQueue *rq) +{ + assert(rq != NULL); + if (RingQueue_IsAllocated(rq)) { + usbvideo_rvfree(rq->queue, rq->length); + rq->queue = NULL; + rq->length = 0; + } +} + +int RingQueue_Dequeue(struct RingQueue *rq, unsigned char *dst, int len) +{ + int rql, toread; + + assert(rq != NULL); + assert(dst != NULL); + + rql = RingQueue_GetLength(rq); + if(!rql) + return 0; + + /* Clip requested length to available data */ + if(len > rql) + len = rql; + + toread = len; + if(rq->ri > rq->wi) { + /* Read data from tail */ + int read = (toread < (rq->length - rq->ri)) ? toread : rq->length - rq->ri; + memcpy(dst, rq->queue + rq->ri, read); + toread -= read; + dst += read; + rq->ri = (rq->ri + read) & (rq->length-1); + } + if(toread) { + /* Read data from head */ + memcpy(dst, rq->queue + rq->ri, toread); + rq->ri = (rq->ri + toread) & (rq->length-1); + } + return len; +} + +EXPORT_SYMBOL(RingQueue_Dequeue); + +int RingQueue_Enqueue(struct RingQueue *rq, const unsigned char *cdata, int n) +{ + int enqueued = 0; + + assert(rq != NULL); + assert(cdata != NULL); + assert(rq->length > 0); + while (n > 0) { + int m, q_avail; + + /* Calculate the largest chunk that fits the tail of the ring */ + q_avail = rq->length - rq->wi; + if (q_avail <= 0) { + rq->wi = 0; + q_avail = rq->length; + } + m = n; + assert(q_avail > 0); + if (m > q_avail) + m = q_avail; + + memcpy(rq->queue + rq->wi, cdata, m); + RING_QUEUE_ADVANCE_INDEX(rq, wi, m); + cdata += m; + enqueued += m; + n -= m; + } + return enqueued; +} + +EXPORT_SYMBOL(RingQueue_Enqueue); + +static void RingQueue_InterruptibleSleepOn(struct RingQueue *rq) +{ + assert(rq != NULL); + interruptible_sleep_on(&rq->wqh); +} + +void RingQueue_WakeUpInterruptible(struct RingQueue *rq) +{ + assert(rq != NULL); + if (waitqueue_active(&rq->wqh)) + wake_up_interruptible(&rq->wqh); +} + +EXPORT_SYMBOL(RingQueue_WakeUpInterruptible); + +void RingQueue_Flush(struct RingQueue *rq) +{ + assert(rq != NULL); + rq->ri = 0; + rq->wi = 0; +} + +EXPORT_SYMBOL(RingQueue_Flush); + + +/* + * usbvideo_VideosizeToString() + * + * This procedure converts given videosize value to readable string. + * + * History: + * 07-Aug-2000 Created. + * 19-Oct-2000 Reworked for usbvideo module. + */ +static void usbvideo_VideosizeToString(char *buf, int bufLen, videosize_t vs) +{ + char tmp[40]; + int n; + + n = 1 + sprintf(tmp, "%ldx%ld", VIDEOSIZE_X(vs), VIDEOSIZE_Y(vs)); + assert(n < sizeof(tmp)); + if ((buf == NULL) || (bufLen < n)) + err("usbvideo_VideosizeToString: buffer is too small."); + else + memmove(buf, tmp, n); +} + +/* + * usbvideo_OverlayChar() + * + * History: + * 01-Feb-2000 Created. + */ +static void usbvideo_OverlayChar(struct uvd *uvd, struct usbvideo_frame *frame, + int x, int y, int ch) +{ + static const unsigned short digits[16] = { + 0xF6DE, /* 0 */ + 0x2492, /* 1 */ + 0xE7CE, /* 2 */ + 0xE79E, /* 3 */ + 0xB792, /* 4 */ + 0xF39E, /* 5 */ + 0xF3DE, /* 6 */ + 0xF492, /* 7 */ + 0xF7DE, /* 8 */ + 0xF79E, /* 9 */ + 0x77DA, /* a */ + 0xD75C, /* b */ + 0xF24E, /* c */ + 0xD6DC, /* d */ + 0xF34E, /* e */ + 0xF348 /* f */ + }; + unsigned short digit; + int ix, iy; + int value; + + if ((uvd == NULL) || (frame == NULL)) + return; + + value = hex_to_bin(ch); + if (value < 0) + return; + digit = digits[value]; + + for (iy=0; iy < 5; iy++) { + for (ix=0; ix < 3; ix++) { + if (digit & 0x8000) { + if (uvd->paletteBits & (1L << VIDEO_PALETTE_RGB24)) { +/* TODO */ RGB24_PUTPIXEL(frame, x+ix, y+iy, 0xFF, 0xFF, 0xFF); + } + } + digit = digit << 1; + } + } +} + +/* + * usbvideo_OverlayString() + * + * History: + * 01-Feb-2000 Created. + */ +static void usbvideo_OverlayString(struct uvd *uvd, struct usbvideo_frame *frame, + int x, int y, const char *str) +{ + while (*str) { + usbvideo_OverlayChar(uvd, frame, x, y, *str); + str++; + x += 4; /* 3 pixels character + 1 space */ + } +} + +/* + * usbvideo_OverlayStats() + * + * Overlays important debugging information. + * + * History: + * 01-Feb-2000 Created. + */ +static void usbvideo_OverlayStats(struct uvd *uvd, struct usbvideo_frame *frame) +{ + const int y_diff = 8; + char tmp[16]; + int x = 10, y=10; + long i, j, barLength; + const int qi_x1 = 60, qi_y1 = 10; + const int qi_x2 = VIDEOSIZE_X(frame->request) - 10, qi_h = 10; + + /* Call the user callback, see if we may proceed after that */ + if (VALID_CALLBACK(uvd, overlayHook)) { + if (GET_CALLBACK(uvd, overlayHook)(uvd, frame) < 0) + return; + } + + /* + * We draw a (mostly) hollow rectangle with qi_xxx coordinates. + * Left edge symbolizes the queue index 0; right edge symbolizes + * the full capacity of the queue. + */ + barLength = qi_x2 - qi_x1 - 2; + if ((barLength > 10) && (uvd->paletteBits & (1L << VIDEO_PALETTE_RGB24))) { +/* TODO */ long u_lo, u_hi, q_used; + long m_ri, m_wi, m_lo, m_hi; + + /* + * Determine fill zones (used areas of the queue): + * 0 xxxxxxx u_lo ...... uvd->dp.ri xxxxxxxx u_hi ..... uvd->dp.length + * + * if u_lo < 0 then there is no first filler. + */ + + q_used = RingQueue_GetLength(&uvd->dp); + if ((uvd->dp.ri + q_used) >= uvd->dp.length) { + u_hi = uvd->dp.length; + u_lo = (q_used + uvd->dp.ri) & (uvd->dp.length-1); + } else { + u_hi = (q_used + uvd->dp.ri); + u_lo = -1; + } + + /* Convert byte indices into screen units */ + m_ri = qi_x1 + ((barLength * uvd->dp.ri) / uvd->dp.length); + m_wi = qi_x1 + ((barLength * uvd->dp.wi) / uvd->dp.length); + m_lo = (u_lo > 0) ? (qi_x1 + ((barLength * u_lo) / uvd->dp.length)) : -1; + m_hi = qi_x1 + ((barLength * u_hi) / uvd->dp.length); + + for (j=qi_y1; j < (qi_y1 + qi_h); j++) { + for (i=qi_x1; i < qi_x2; i++) { + /* Draw border lines */ + if ((j == qi_y1) || (j == (qi_y1 + qi_h - 1)) || + (i == qi_x1) || (i == (qi_x2 - 1))) { + RGB24_PUTPIXEL(frame, i, j, 0xFF, 0xFF, 0xFF); + continue; + } + /* For all other points the Y coordinate does not matter */ + if ((i >= m_ri) && (i <= (m_ri + 3))) { + RGB24_PUTPIXEL(frame, i, j, 0x00, 0xFF, 0x00); + } else if ((i >= m_wi) && (i <= (m_wi + 3))) { + RGB24_PUTPIXEL(frame, i, j, 0xFF, 0x00, 0x00); + } else if ((i < m_lo) || ((i > m_ri) && (i < m_hi))) + RGB24_PUTPIXEL(frame, i, j, 0x00, 0x00, 0xFF); + } + } + } + + sprintf(tmp, "%8lx", uvd->stats.frame_num); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8lx", uvd->stats.urb_count); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8lx", uvd->stats.urb_length); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8lx", uvd->stats.data_count); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8lx", uvd->stats.header_count); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8lx", uvd->stats.iso_skip_count); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8lx", uvd->stats.iso_err_count); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8x", uvd->vpic.colour); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8x", uvd->vpic.hue); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8x", uvd->vpic.brightness >> 8); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8x", uvd->vpic.contrast >> 12); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; + + sprintf(tmp, "%8d", uvd->vpic.whiteness >> 8); + usbvideo_OverlayString(uvd, frame, x, y, tmp); + y += y_diff; +} + +/* + * usbvideo_ReportStatistics() + * + * This procedure prints packet and transfer statistics. + * + * History: + * 14-Jan-2000 Corrected default multiplier. + */ +static void usbvideo_ReportStatistics(const struct uvd *uvd) +{ + if ((uvd != NULL) && (uvd->stats.urb_count > 0)) { + unsigned long allPackets, badPackets, goodPackets, percent; + allPackets = uvd->stats.urb_count * CAMERA_URB_FRAMES; + badPackets = uvd->stats.iso_skip_count + uvd->stats.iso_err_count; + goodPackets = allPackets - badPackets; + /* Calculate percentage wisely, remember integer limits */ + assert(allPackets != 0); + if (goodPackets < (((unsigned long)-1)/100)) + percent = (100 * goodPackets) / allPackets; + else + percent = goodPackets / (allPackets / 100); + dev_info(&uvd->dev->dev, + "Packet Statistics: Total=%lu. Empty=%lu. Usage=%lu%%\n", + allPackets, badPackets, percent); + if (uvd->iso_packet_len > 0) { + unsigned long allBytes, xferBytes; + char multiplier = ' '; + allBytes = allPackets * uvd->iso_packet_len; + xferBytes = uvd->stats.data_count; + assert(allBytes != 0); + if (xferBytes < (((unsigned long)-1)/100)) + percent = (100 * xferBytes) / allBytes; + else + percent = xferBytes / (allBytes / 100); + /* Scale xferBytes for easy reading */ + if (xferBytes > 10*1024) { + xferBytes /= 1024; + multiplier = 'K'; + if (xferBytes > 10*1024) { + xferBytes /= 1024; + multiplier = 'M'; + if (xferBytes > 10*1024) { + xferBytes /= 1024; + multiplier = 'G'; + if (xferBytes > 10*1024) { + xferBytes /= 1024; + multiplier = 'T'; + } + } + } + } + dev_info(&uvd->dev->dev, + "Transfer Statistics: Transferred=%lu%cB Usage=%lu%%\n", + xferBytes, multiplier, percent); + } + } +} + +/* + * usbvideo_TestPattern() + * + * Procedure forms a test pattern (yellow grid on blue background). + * + * Parameters: + * fullframe: if TRUE then entire frame is filled, otherwise the procedure + * continues from the current scanline. + * pmode 0: fill the frame with solid blue color (like on VCR or TV) + * 1: Draw a colored grid + * + * History: + * 01-Feb-2000 Created. + */ +void usbvideo_TestPattern(struct uvd *uvd, int fullframe, int pmode) +{ + struct usbvideo_frame *frame; + int num_cell = 0; + int scan_length = 0; + static int num_pass; + + if (uvd == NULL) { + err("%s: uvd == NULL", __func__); + return; + } + if ((uvd->curframe < 0) || (uvd->curframe >= USBVIDEO_NUMFRAMES)) { + err("%s: uvd->curframe=%d.", __func__, uvd->curframe); + return; + } + + /* Grab the current frame */ + frame = &uvd->frame[uvd->curframe]; + + /* Optionally start at the beginning */ + if (fullframe) { + frame->curline = 0; + frame->seqRead_Length = 0; + } +#if 0 + { /* For debugging purposes only */ + char tmp[20]; + usbvideo_VideosizeToString(tmp, sizeof(tmp), frame->request); + dev_info(&uvd->dev->dev, "testpattern: frame=%s\n", tmp); + } +#endif + /* Form every scan line */ + for (; frame->curline < VIDEOSIZE_Y(frame->request); frame->curline++) { + int i; + unsigned char *f = frame->data + + (VIDEOSIZE_X(frame->request) * V4L_BYTES_PER_PIXEL * frame->curline); + for (i=0; i < VIDEOSIZE_X(frame->request); i++) { + unsigned char cb=0x80; + unsigned char cg = 0; + unsigned char cr = 0; + + if (pmode == 1) { + if (frame->curline % 32 == 0) + cb = 0, cg = cr = 0xFF; + else if (i % 32 == 0) { + if (frame->curline % 32 == 1) + num_cell++; + cb = 0, cg = cr = 0xFF; + } else { + cb = ((num_cell*7) + num_pass) & 0xFF; + cg = ((num_cell*5) + num_pass*2) & 0xFF; + cr = ((num_cell*3) + num_pass*3) & 0xFF; + } + } else { + /* Just the blue screen */ + } + + *f++ = cb; + *f++ = cg; + *f++ = cr; + scan_length += 3; + } + } + + frame->frameState = FrameState_Done; + frame->seqRead_Length += scan_length; + ++num_pass; + + /* We do this unconditionally, regardless of FLAGS_OVERLAY_STATS */ + usbvideo_OverlayStats(uvd, frame); +} + +EXPORT_SYMBOL(usbvideo_TestPattern); + + +#ifdef DEBUG +/* + * usbvideo_HexDump() + * + * A debugging tool. Prints hex dumps. + * + * History: + * 29-Jul-2000 Added printing of offsets. + */ +void usbvideo_HexDump(const unsigned char *data, int len) +{ + const int bytes_per_line = 32; + char tmp[128]; /* 32*3 + 5 */ + int i, k; + + for (i=k=0; len > 0; i++, len--) { + if (i > 0 && ((i % bytes_per_line) == 0)) { + printk("%s\n", tmp); + k=0; + } + if ((i % bytes_per_line) == 0) + k += sprintf(&tmp[k], "%04x: ", i); + k += sprintf(&tmp[k], "%02x ", data[i]); + } + if (k > 0) + printk("%s\n", tmp); +} + +EXPORT_SYMBOL(usbvideo_HexDump); + +#endif + +/* ******************************************************************** */ + +/* XXX: this piece of crap really wants some error handling.. */ +static int usbvideo_ClientIncModCount(struct uvd *uvd) +{ + if (uvd == NULL) { + err("%s: uvd == NULL", __func__); + return -EINVAL; + } + if (uvd->handle == NULL) { + err("%s: uvd->handle == NULL", __func__); + return -EINVAL; + } + if (!try_module_get(uvd->handle->md_module)) { + err("%s: try_module_get() == 0", __func__); + return -ENODEV; + } + return 0; +} + +static void usbvideo_ClientDecModCount(struct uvd *uvd) +{ + if (uvd == NULL) { + err("%s: uvd == NULL", __func__); + return; + } + if (uvd->handle == NULL) { + err("%s: uvd->handle == NULL", __func__); + return; + } + if (uvd->handle->md_module == NULL) { + err("%s: uvd->handle->md_module == NULL", __func__); + return; + } + module_put(uvd->handle->md_module); +} + +int usbvideo_register( + struct usbvideo **pCams, + const int num_cams, + const int num_extra, + const char *driverName, + const struct usbvideo_cb *cbTbl, + struct module *md, + const struct usb_device_id *id_table) +{ + struct usbvideo *cams; + int i, base_size, result; + + /* Check parameters for sanity */ + if ((num_cams <= 0) || (pCams == NULL) || (cbTbl == NULL)) { + err("%s: Illegal call", __func__); + return -EINVAL; + } + + /* Check registration callback - must be set! */ + if (cbTbl->probe == NULL) { + err("%s: probe() is required!", __func__); + return -EINVAL; + } + + base_size = num_cams * sizeof(struct uvd) + sizeof(struct usbvideo); + cams = kzalloc(base_size, GFP_KERNEL); + if (cams == NULL) { + err("Failed to allocate %d. bytes for usbvideo struct", base_size); + return -ENOMEM; + } + dbg("%s: Allocated $%p (%d. bytes) for %d. cameras", + __func__, cams, base_size, num_cams); + + /* Copy callbacks, apply defaults for those that are not set */ + memmove(&cams->cb, cbTbl, sizeof(cams->cb)); + if (cams->cb.getFrame == NULL) + cams->cb.getFrame = usbvideo_GetFrame; + if (cams->cb.disconnect == NULL) + cams->cb.disconnect = usbvideo_Disconnect; + if (cams->cb.startDataPump == NULL) + cams->cb.startDataPump = usbvideo_StartDataPump; + if (cams->cb.stopDataPump == NULL) + cams->cb.stopDataPump = usbvideo_StopDataPump; + + cams->num_cameras = num_cams; + cams->cam = (struct uvd *) &cams[1]; + cams->md_module = md; + mutex_init(&cams->lock); /* to 1 == available */ + + for (i = 0; i < num_cams; i++) { + struct uvd *up = &cams->cam[i]; + + up->handle = cams; + + /* Allocate user_data separately because of kmalloc's limits */ + if (num_extra > 0) { + up->user_size = num_cams * num_extra; + up->user_data = kmalloc(up->user_size, GFP_KERNEL); + if (up->user_data == NULL) { + err("%s: Failed to allocate user_data (%d. bytes)", + __func__, up->user_size); + while (i) { + up = &cams->cam[--i]; + kfree(up->user_data); + } + kfree(cams); + return -ENOMEM; + } + dbg("%s: Allocated cams[%d].user_data=$%p (%d. bytes)", + __func__, i, up->user_data, up->user_size); + } + } + + /* + * Register ourselves with USB stack. + */ + strcpy(cams->drvName, (driverName != NULL) ? driverName : "Unknown"); + cams->usbdrv.name = cams->drvName; + cams->usbdrv.probe = cams->cb.probe; + cams->usbdrv.disconnect = cams->cb.disconnect; + cams->usbdrv.id_table = id_table; + + /* + * Update global handle to usbvideo. This is very important + * because probe() can be called before usb_register() returns. + * If the handle is not yet updated then the probe() will fail. + */ + *pCams = cams; + result = usb_register(&cams->usbdrv); + if (result) { + for (i = 0; i < num_cams; i++) { + struct uvd *up = &cams->cam[i]; + kfree(up->user_data); + } + kfree(cams); + } + + return result; +} + +EXPORT_SYMBOL(usbvideo_register); + +/* + * usbvideo_Deregister() + * + * Procedure frees all usbvideo and user data structures. Be warned that + * if you had some dynamically allocated components in ->user field then + * you should free them before calling here. + */ +void usbvideo_Deregister(struct usbvideo **pCams) +{ + struct usbvideo *cams; + int i; + + if (pCams == NULL) { + err("%s: pCams == NULL", __func__); + return; + } + cams = *pCams; + if (cams == NULL) { + err("%s: cams == NULL", __func__); + return; + } + + dbg("%s: Deregistering %s driver.", __func__, cams->drvName); + usb_deregister(&cams->usbdrv); + + dbg("%s: Deallocating cams=$%p (%d. cameras)", __func__, cams, cams->num_cameras); + for (i=0; i < cams->num_cameras; i++) { + struct uvd *up = &cams->cam[i]; + int warning = 0; + + if (up->user_data != NULL) { + if (up->user_size <= 0) + ++warning; + } else { + if (up->user_size > 0) + ++warning; + } + if (warning) { + err("%s: Warning: user_data=$%p user_size=%d.", + __func__, up->user_data, up->user_size); + } else { + dbg("%s: Freeing %d. $%p->user_data=$%p", + __func__, i, up, up->user_data); + kfree(up->user_data); + } + } + /* Whole array was allocated in one chunk */ + dbg("%s: Freed %d uvd structures", + __func__, cams->num_cameras); + kfree(cams); + *pCams = NULL; +} + +EXPORT_SYMBOL(usbvideo_Deregister); + +/* + * usbvideo_Disconnect() + * + * This procedure stops all driver activity. Deallocation of + * the interface-private structure (pointed by 'ptr') is done now + * (if we don't have any open files) or later, when those files + * are closed. After that driver should be removable. + * + * This code handles surprise removal. The uvd->user is a counter which + * increments on open() and decrements on close(). If we see here that + * this counter is not 0 then we have a client who still has us opened. + * We set uvd->remove_pending flag as early as possible, and after that + * all access to the camera will gracefully fail. These failures should + * prompt client to (eventually) close the video device, and then - in + * usbvideo_v4l_close() - we decrement uvd->uvd_used and usage counter. + * + * History: + * 22-Jan-2000 Added polling of MOD_IN_USE to delay removal until all users gone. + * 27-Jan-2000 Reworked to allow pending disconnects; see xxx_close() + * 24-May-2000 Corrected to prevent race condition (MOD_xxx_USE_COUNT). + * 19-Oct-2000 Moved to usbvideo module. + */ +static void usbvideo_Disconnect(struct usb_interface *intf) +{ + struct uvd *uvd = usb_get_intfdata (intf); + int i; + + if (uvd == NULL) { + err("%s($%p): Illegal call.", __func__, intf); + return; + } + + usb_set_intfdata (intf, NULL); + + usbvideo_ClientIncModCount(uvd); + if (uvd->debug > 0) + dev_info(&intf->dev, "%s(%p.)\n", __func__, intf); + + mutex_lock(&uvd->lock); + uvd->remove_pending = 1; /* Now all ISO data will be ignored */ + + /* At this time we ask to cancel outstanding URBs */ + GET_CALLBACK(uvd, stopDataPump)(uvd); + + for (i=0; i < USBVIDEO_NUMSBUF; i++) + usb_free_urb(uvd->sbuf[i].urb); + + usb_put_dev(uvd->dev); + uvd->dev = NULL; /* USB device is no more */ + + video_unregister_device(&uvd->vdev); + if (uvd->debug > 0) + dev_info(&intf->dev, "%s: Video unregistered.\n", __func__); + + if (uvd->user) + dev_info(&intf->dev, "%s: In use, disconnect pending.\n", + __func__); + else + usbvideo_CameraRelease(uvd); + mutex_unlock(&uvd->lock); + dev_info(&intf->dev, "USB camera disconnected.\n"); + + usbvideo_ClientDecModCount(uvd); +} + +/* + * usbvideo_CameraRelease() + * + * This code does final release of uvd. This happens + * after the device is disconnected -and- all clients + * closed their files. + * + * History: + * 27-Jan-2000 Created. + */ +static void usbvideo_CameraRelease(struct uvd *uvd) +{ + if (uvd == NULL) { + err("%s: Illegal call", __func__); + return; + } + + RingQueue_Free(&uvd->dp); + if (VALID_CALLBACK(uvd, userFree)) + GET_CALLBACK(uvd, userFree)(uvd); + uvd->uvd_used = 0; /* This is atomic, no need to take mutex */ +} + +/* + * usbvideo_find_struct() + * + * This code searches the array of preallocated (static) structures + * and returns index of the first one that isn't in use. Returns -1 + * if there are no free structures. + * + * History: + * 27-Jan-2000 Created. + */ +static int usbvideo_find_struct(struct usbvideo *cams) +{ + int u, rv = -1; + + if (cams == NULL) { + err("No usbvideo handle?"); + return -1; + } + mutex_lock(&cams->lock); + for (u = 0; u < cams->num_cameras; u++) { + struct uvd *uvd = &cams->cam[u]; + if (!uvd->uvd_used) /* This one is free */ + { + uvd->uvd_used = 1; /* In use now */ + mutex_init(&uvd->lock); /* to 1 == available */ + uvd->dev = NULL; + rv = u; + break; + } + } + mutex_unlock(&cams->lock); + return rv; +} + +static const struct v4l2_file_operations usbvideo_fops = { + .owner = THIS_MODULE, + .open = usbvideo_v4l_open, + .release =usbvideo_v4l_close, + .read = usbvideo_v4l_read, + .mmap = usbvideo_v4l_mmap, + .ioctl = usbvideo_v4l_ioctl, +}; +static const struct video_device usbvideo_template = { + .fops = &usbvideo_fops, +}; + +struct uvd *usbvideo_AllocateDevice(struct usbvideo *cams) +{ + int i, devnum; + struct uvd *uvd = NULL; + + if (cams == NULL) { + err("No usbvideo handle?"); + return NULL; + } + + devnum = usbvideo_find_struct(cams); + if (devnum == -1) { + err("IBM USB camera driver: Too many devices!"); + return NULL; + } + uvd = &cams->cam[devnum]; + dbg("Device entry #%d. at $%p", devnum, uvd); + + /* Not relying upon caller we increase module counter ourselves */ + usbvideo_ClientIncModCount(uvd); + + mutex_lock(&uvd->lock); + for (i=0; i < USBVIDEO_NUMSBUF; i++) { + uvd->sbuf[i].urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); + if (uvd->sbuf[i].urb == NULL) { + err("usb_alloc_urb(%d.) failed.", FRAMES_PER_DESC); + uvd->uvd_used = 0; + uvd = NULL; + goto allocate_done; + } + } + uvd->user=0; + uvd->remove_pending = 0; + uvd->last_error = 0; + RingQueue_Initialize(&uvd->dp); + + /* Initialize video device structure */ + uvd->vdev = usbvideo_template; + sprintf(uvd->vdev.name, "%.20s USB Camera", cams->drvName); + /* + * The client is free to overwrite those because we + * return control to the client's probe function right now. + */ +allocate_done: + mutex_unlock(&uvd->lock); + usbvideo_ClientDecModCount(uvd); + return uvd; +} + +EXPORT_SYMBOL(usbvideo_AllocateDevice); + +int usbvideo_RegisterVideoDevice(struct uvd *uvd) +{ + char tmp1[20], tmp2[20]; /* Buffers for printing */ + + if (uvd == NULL) { + err("%s: Illegal call.", __func__); + return -EINVAL; + } + if (uvd->video_endp == 0) { + dev_info(&uvd->dev->dev, + "%s: No video endpoint specified; data pump disabled.\n", + __func__); + } + if (uvd->paletteBits == 0) { + err("%s: No palettes specified!", __func__); + return -EINVAL; + } + if (uvd->defaultPalette == 0) { + dev_info(&uvd->dev->dev, "%s: No default palette!\n", + __func__); + } + + uvd->max_frame_size = VIDEOSIZE_X(uvd->canvas) * + VIDEOSIZE_Y(uvd->canvas) * V4L_BYTES_PER_PIXEL; + usbvideo_VideosizeToString(tmp1, sizeof(tmp1), uvd->videosize); + usbvideo_VideosizeToString(tmp2, sizeof(tmp2), uvd->canvas); + + if (uvd->debug > 0) { + dev_info(&uvd->dev->dev, + "%s: iface=%d. endpoint=$%02x paletteBits=$%08lx\n", + __func__, uvd->iface, uvd->video_endp, + uvd->paletteBits); + } + if (uvd->dev == NULL) { + err("%s: uvd->dev == NULL", __func__); + return -EINVAL; + } + uvd->vdev.parent = &uvd->dev->dev; + uvd->vdev.release = video_device_release_empty; + if (video_register_device(&uvd->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { + err("%s: video_register_device failed", __func__); + return -EPIPE; + } + if (uvd->debug > 1) { + dev_info(&uvd->dev->dev, + "%s: video_register_device() successful\n", __func__); + } + + dev_info(&uvd->dev->dev, "%s on %s: canvas=%s videosize=%s\n", + (uvd->handle != NULL) ? uvd->handle->drvName : "???", + video_device_node_name(&uvd->vdev), tmp2, tmp1); + + usb_get_dev(uvd->dev); + return 0; +} + +EXPORT_SYMBOL(usbvideo_RegisterVideoDevice); + +/* ******************************************************************** */ + +static int usbvideo_v4l_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct uvd *uvd = file->private_data; + unsigned long start = vma->vm_start; + unsigned long size = vma->vm_end-vma->vm_start; + unsigned long page, pos; + + if (!CAMERA_IS_OPERATIONAL(uvd)) + return -EFAULT; + + if (size > (((USBVIDEO_NUMFRAMES * uvd->max_frame_size) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))) + return -EINVAL; + + pos = (unsigned long) uvd->fbuf; + while (size > 0) { + page = vmalloc_to_pfn((void *)pos); + if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) + return -EAGAIN; + + start += PAGE_SIZE; + pos += PAGE_SIZE; + if (size > PAGE_SIZE) + size -= PAGE_SIZE; + else + size = 0; + } + + return 0; +} + +/* + * usbvideo_v4l_open() + * + * This is part of Video 4 Linux API. The driver can be opened by one + * client only (checks internal counter 'uvdser'). The procedure + * then allocates buffers needed for video processing. + * + * History: + * 22-Jan-2000 Rewrote, moved scratch buffer allocation here. Now the + * camera is also initialized here (once per connect), at + * expense of V4L client (it waits on open() call). + * 27-Jan-2000 Used USBVIDEO_NUMSBUF as number of URB buffers. + * 24-May-2000 Corrected to prevent race condition (MOD_xxx_USE_COUNT). |