patch-2.2.18 linux/drivers/usb/ibmcam.c
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- Lines: 3163
- Date:
Sat Sep 23 13:22:07 2000
- Orig file:
v2.2.17/drivers/usb/ibmcam.c
- Orig date:
Thu Jan 1 01:00:00 1970
diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/ibmcam.c linux/drivers/usb/ibmcam.c
@@ -0,0 +1,3162 @@
+/*
+ * USB IBM C-It Video Camera driver
+ *
+ * Supports IBM C-It Video Camera.
+ *
+ * This driver is based on earlier work of:
+ *
+ * (C) Copyright 1999 Johannes Erdfelt
+ * (C) Copyright 1999 Randy Dunlap
+ *
+ * 5/24/00 Removed optional (and unnecessary) locking of the driver while
+ * the device remains plugged in. Corrected race conditions in ibmcam_open
+ * and ibmcam_probe() routines using this as a guideline:
+ *
+ * (2) The big kernel lock is automatically released when a process sleeps
+ * in the kernel and is automatically reacquired on reschedule if the
+ * process had the lock originally. Any code that can be compiled as
+ * a module and is entered with the big kernel lock held *MUST*
+ * increment the use count to activate the indirect module protection
+ * before doing anything that might sleep.
+ *
+ * In practice, this means that all routines that live in modules and
+ * are invoked under the big kernel lock should do MOD_INC_USE_COUNT
+ * as their very first action. And all failure paths from that
+ * routine must do MOD_DEC_USE_COUNT before returning.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+#include <linux/malloc.h>
+#include <linux/mm.h>
+#include <linux/smp_lock.h>
+#include <linux/videodev.h>
+#include <linux/vmalloc.h>
+#include <linux/wrapper.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/usb.h>
+
+#include <asm/io.h>
+
+#include "ibmcam.h"
+
+#define ENABLE_HEXDUMP 0 /* Enable if you need it */
+static int debug = 0;
+
+/* Completion states of the data parser */
+typedef enum {
+ scan_Continue, /* Just parse next item */
+ scan_NextFrame, /* Frame done, send it to V4L */
+ scan_Out, /* Not enough data for frame */
+ scan_EndParse /* End parsing */
+} scan_state_t;
+
+/* Bit flags (options) */
+#define FLAGS_RETRY_VIDIOCSYNC (1 << 0)
+#define FLAGS_MONOCHROME (1 << 1)
+#define FLAGS_DISPLAY_HINTS (1 << 2)
+#define FLAGS_OVERLAY_STATS (1 << 3)
+#define FLAGS_FORCE_TESTPATTERN (1 << 4)
+#define FLAGS_SEPARATE_FRAMES (1 << 5)
+#define FLAGS_CLEAN_FRAMES (1 << 6)
+
+static int flags = 0; /* FLAGS_DISPLAY_HINTS | FLAGS_OVERLAY_STATS; */
+
+/* This is the size of V4L frame that we provide */
+static const int imgwidth = V4L_FRAME_WIDTH_USED;
+static const int imgheight = V4L_FRAME_HEIGHT;
+static const int min_imgwidth = 8;
+static const int min_imgheight = 4;
+
+static int lighting = 1; /* Medium */
+
+#define SHARPNESS_MIN 0
+#define SHARPNESS_MAX 6
+static int sharpness = 4; /* Low noise, good details */
+
+#define FRAMERATE_MIN 0
+#define FRAMERATE_MAX 6
+static int framerate = 2; /* Lower, reliable frame rate (8-12 fps) */
+
+enum {
+ VIDEOSIZE_128x96 = 0,
+ VIDEOSIZE_176x144,
+ VIDEOSIZE_352x288,
+ VIDEOSIZE_320x240,
+ VIDEOSIZE_352x240,
+};
+
+static int videosize = VIDEOSIZE_352x288;
+
+/*
+ * The value of 'scratchbufsize' affects quality of the picture
+ * in many ways. Shorter buffers may cause loss of data when client
+ * is too slow. Larger buffers are memory-consuming and take longer
+ * to work with. This setting can be adjusted, but the default value
+ * should be OK for most desktop users.
+ */
+#define DEFAULT_SCRATCH_BUF_SIZE (0x10000) /* 64 KB */
+static const int scratchbufsize = DEFAULT_SCRATCH_BUF_SIZE;
+
+/*
+ * Here we define several initialization variables. They may
+ * be used to automatically set color, hue, brightness and
+ * contrast to desired values. This is particularly useful in
+ * case of webcams (which have no controls and no on-screen
+ * output) and also when a client V4L software is used that
+ * does not have some of those controls. In any case it's
+ * good to have startup values as options.
+ *
+ * These values are all in [0..255] range. This simplifies
+ * operation. Note that actual values of V4L variables may
+ * be scaled up (as much as << 8). User can see that only
+ * on overlay output, however, or through a V4L client.
+ */
+static int init_brightness = 128;
+static int init_contrast = 192;
+static int init_color = 128;
+static int init_hue = 128;
+static int hue_correction = 128;
+
+/* Settings for camera model 2 */
+static int init_model2_rg = -1;
+static int init_model2_rg2 = -1;
+static int init_model2_sat = -1;
+static int init_model2_yb = -1;
+
+MODULE_PARM(debug, "i");
+MODULE_PARM_DESC(debug, "Debug level: 0-9 (default=0)");
+MODULE_PARM(flags, "i");
+MODULE_PARM_DESC(flags, "Bitfield: 0=VIDIOCSYNC, 1=B/W, 2=show hints, 3=show stats, 4=test pattern, 5=seperate frames, 6=clean frames");
+MODULE_PARM(framerate, "i");
+MODULE_PARM_DESC(framerate, "Framerate setting: 0=slowest, 6=fastest (default=2)");
+MODULE_PARM(lighting, "i");
+MODULE_PARM_DESC(lighting, "Photosensitivity: 0=bright, 1=medium (default), 2=low light");
+MODULE_PARM(sharpness, "i");
+MODULE_PARM_DESC(sharpness, "Model1 noise reduction: 0=smooth, 6=sharp (default=4)");
+MODULE_PARM(videosize, "i");
+MODULE_PARM_DESC(videosize, "Image size: 0=128x96, 1=176x144, 2=352x288, 3=320x240, 4=352x240 (default=1)");
+MODULE_PARM(init_brightness, "i");
+MODULE_PARM_DESC(init_brightness, "Brightness preconfiguration: 0-255 (default=128)");
+MODULE_PARM(init_contrast, "i");
+MODULE_PARM_DESC(init_contrast, "Contrast preconfiguration: 0-255 (default=192)");
+MODULE_PARM(init_color, "i");
+MODULE_PARM_DESC(init_color, "Dolor preconfiguration: 0-255 (default=128)");
+MODULE_PARM(init_hue, "i");
+MODULE_PARM_DESC(init_hue, "Hue preconfiguration: 0-255 (default=128)");
+MODULE_PARM(hue_correction, "i");
+MODULE_PARM_DESC(hue_correction, "YUV colorspace regulation: 0-255 (default=128)");
+
+MODULE_PARM(init_model2_rg, "i");
+MODULE_PARM_DESC(init_model2_rg, "Model2 preconfiguration: 0-255 (default=112)");
+MODULE_PARM(init_model2_rg2, "i");
+MODULE_PARM_DESC(init_model2_rg2, "Model2 preconfiguration: 0-255 (default=47)");
+MODULE_PARM(init_model2_sat, "i");
+MODULE_PARM_DESC(init_model2_sat, "Model2 preconfiguration: 0-255 (default=52)");
+MODULE_PARM(init_model2_yb, "i");
+MODULE_PARM_DESC(init_model2_yb, "Model2 preconfiguration: 0-255 (default=160)");
+
+MODULE_AUTHOR ("module author");
+MODULE_DESCRIPTION ("IBM/Xirlink C-it USB Camera Driver for Linux (c) 2000");
+
+/* Still mysterious i2c commands */
+static const unsigned short unknown_88 = 0x0088;
+static const unsigned short unknown_89 = 0x0089;
+static const unsigned short bright_3x[3] = { 0x0031, 0x0032, 0x0033 };
+static const unsigned short contrast_14 = 0x0014;
+static const unsigned short light_27 = 0x0027;
+static const unsigned short sharp_13 = 0x0013;
+
+/* i2c commands for Model 2 cameras */
+static const unsigned short mod2_brightness = 0x001a; /* $5b .. $ee; default=$5a */
+static const unsigned short mod2_set_framerate = 0x001c; /* 0 (fast).. $1F (slow) */
+static const unsigned short mod2_color_balance_rg2 = 0x001e; /* 0 (red) .. $7F (green) */
+static const unsigned short mod2_saturation = 0x0020; /* 0 (b/w) - $7F (full color) */
+static const unsigned short mod2_color_balance_yb = 0x0022; /* 0..$7F, $50 is about right */
+static const unsigned short mod2_color_balance_rg = 0x0024; /* 0..$7F, $70 is about right */
+static const unsigned short mod2_sensitivity = 0x0028; /* 0 (min) .. $1F (max) */
+
+#define MAX_IBMCAM 4
+
+struct usb_ibmcam cams[MAX_IBMCAM];
+
+/*******************************/
+/* Memory management functions */
+/*******************************/
+
+#define MDEBUG(x) do { } while(0) /* Debug memory management */
+
+static struct usb_driver ibmcam_driver;
+static void usb_ibmcam_release(struct usb_ibmcam *ibmcam);
+
+/* Given PGD from the address space's page table, return the kernel
+ * virtual mapping of the physical memory mapped at ADR.
+ */
+static inline unsigned long uvirt_to_kva(pgd_t *pgd, unsigned long adr)
+{
+ unsigned long ret = 0UL;
+ pmd_t *pmd;
+ pte_t *ptep, pte;
+
+ if (!pgd_none(*pgd)) {
+ pmd = pmd_offset(pgd, adr);
+ if (!pmd_none(*pmd)) {
+ ptep = pte_offset(pmd, adr);
+ pte = *ptep;
+ if (pte_present(pte)) {
+ ret = (unsigned long) page_address(pte_page(pte));
+ ret |= (adr & (PAGE_SIZE - 1));
+ }
+ }
+ }
+ MDEBUG(printk("uv2kva(%lx-->%lx)", adr, ret));
+ return ret;
+}
+
+static inline unsigned long uvirt_to_bus(unsigned long adr)
+{
+ unsigned long kva, ret;
+
+ kva = uvirt_to_kva(pgd_offset(current->mm, adr), adr);
+ ret = virt_to_bus((void *)kva);
+ MDEBUG(printk("uv2b(%lx-->%lx)", adr, ret));
+ return ret;
+}
+
+static inline unsigned long kvirt_to_bus(unsigned long adr)
+{
+ unsigned long va, kva, ret;
+
+ va = VMALLOC_VMADDR(adr);
+ kva = uvirt_to_kva(pgd_offset_k(va), va);
+ ret = virt_to_bus((void *)kva);
+ MDEBUG(printk("kv2b(%lx-->%lx)", adr, ret));
+ return ret;
+}
+
+/* Here we want the physical address of the memory.
+ * This is used when initializing the contents of the
+ * area and marking the pages as reserved.
+ */
+static inline unsigned long kvirt_to_pa(unsigned long adr)
+{
+ unsigned long va, kva, ret;
+
+ va = VMALLOC_VMADDR(adr);
+ kva = uvirt_to_kva(pgd_offset_k(va), va);
+ ret = __pa(kva);
+ MDEBUG(printk("kv2pa(%lx-->%lx)", adr, ret));
+ return ret;
+}
+
+static void *rvmalloc(unsigned long size)
+{
+ void *mem;
+ unsigned long adr, page;
+
+ /* Round it off to PAGE_SIZE */
+ size += (PAGE_SIZE - 1);
+ size &= ~(PAGE_SIZE - 1);
+
+ 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) {
+ page = kvirt_to_pa(adr);
+ mem_map_reserve(MAP_NR(__va(page)));
+ adr += PAGE_SIZE;
+ if (size > PAGE_SIZE)
+ size -= PAGE_SIZE;
+ else
+ size = 0;
+ }
+
+ return mem;
+}
+
+static void rvfree(void *mem, unsigned long size)
+{
+ unsigned long adr, page;
+
+ if (!mem)
+ return;
+
+ size += (PAGE_SIZE - 1);
+ size &= ~(PAGE_SIZE - 1);
+
+ adr=(unsigned long) mem;
+ while (size > 0) {
+ page = kvirt_to_pa(adr);
+ mem_map_unreserve(MAP_NR(__va(page)));
+ adr += PAGE_SIZE;
+ if (size > PAGE_SIZE)
+ size -= PAGE_SIZE;
+ else
+ size = 0;
+ }
+ vfree(mem);
+}
+
+#if ENABLE_HEXDUMP
+static void ibmcam_hexdump(const unsigned char *data, int len)
+{
+ char tmp[80];
+ int i, k;
+
+ for (i=k=0; len > 0; i++, len--) {
+ if (i > 0 && (i%16 == 0)) {
+ printk("%s\n", tmp);
+ k=0;
+ }
+ k += sprintf(&tmp[k], "%02x ", data[i]);
+ }
+ if (k > 0)
+ printk("%s\n", tmp);
+}
+#endif
+
+/*
+ * usb_ibmcam_overlaychar()
+ *
+ * History:
+ * 1/2/00 Created.
+ */
+void usb_ibmcam_overlaychar(
+ struct usb_ibmcam *ibmcam,
+ struct ibmcam_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;
+
+ if ((ibmcam == NULL) || (frame == NULL))
+ return;
+
+ if (ch >= '0' && ch <= '9')
+ ch -= '0';
+ else if (ch >= 'A' && ch <= 'F')
+ ch = 10 + (ch - 'A');
+ else if (ch >= 'a' && ch <= 'f')
+ ch = 10 + (ch - 'a');
+ else
+ return;
+ digit = digits[ch];
+
+ for (iy=0; iy < 5; iy++) {
+ for (ix=0; ix < 3; ix++) {
+ if (digit & 0x8000) {
+ IBMCAM_PUTPIXEL(frame, x+ix, y+iy, 0xFF, 0xFF, 0xFF);
+ }
+ digit = digit << 1;
+ }
+ }
+}
+
+/*
+ * usb_ibmcam_overlaystring()
+ *
+ * History:
+ * 1/2/00 Created.
+ */
+void usb_ibmcam_overlaystring(
+ struct usb_ibmcam *ibmcam,
+ struct ibmcam_frame *frame,
+ int x, int y, const char *str)
+{
+ while (*str) {
+ usb_ibmcam_overlaychar(ibmcam, frame, x, y, *str);
+ str++;
+ x += 4; /* 3 pixels character + 1 space */
+ }
+}
+
+/*
+ * usb_ibmcam_overlaystats()
+ *
+ * Overlays important debugging information.
+ *
+ * History:
+ * 1/2/00 Created.
+ */
+void usb_ibmcam_overlaystats(struct usb_ibmcam *ibmcam, struct ibmcam_frame *frame)
+{
+ const int y_diff = 8;
+ char tmp[16];
+ int x = 10;
+ int y = 10;
+
+ sprintf(tmp, "%8x", ibmcam->frame_num);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8lx", ibmcam->urb_count);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8lx", ibmcam->urb_length);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8lx", ibmcam->data_count);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8lx", ibmcam->header_count);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8lx", ibmcam->scratch_ovf_count);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8lx", ibmcam->iso_skip_count);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8lx", ibmcam->iso_err_count);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8x", ibmcam->vpic.colour);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8x", ibmcam->vpic.hue);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8x", ibmcam->vpic.brightness >> 8);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8x", ibmcam->vpic.contrast >> 12);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+
+ sprintf(tmp, "%8d", ibmcam->vpic.whiteness >> 8);
+ usb_ibmcam_overlaystring(ibmcam, frame, x, y, tmp);
+ y += y_diff;
+}
+
+/*
+ * usb_ibmcam_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:
+ * 1/2/00 Created.
+ */
+void usb_ibmcam_testpattern(struct usb_ibmcam *ibmcam, int fullframe, int pmode)
+{
+ static const char proc[] = "usb_ibmcam_testpattern";
+ struct ibmcam_frame *frame;
+ unsigned char *f;
+ int num_cell = 0;
+ int scan_length = 0;
+ static int num_pass = 0;
+
+ if (ibmcam == NULL) {
+ printk(KERN_ERR "%s: ibmcam == NULL\n", proc);
+ return;
+ }
+ if ((ibmcam->curframe < 0) || (ibmcam->curframe >= IBMCAM_NUMFRAMES)) {
+ printk(KERN_ERR "%s: ibmcam->curframe=%d.\n", proc, ibmcam->curframe);
+ return;
+ }
+
+ /* Grab the current frame */
+ frame = &ibmcam->frame[ibmcam->curframe];
+
+ /* Optionally start at the beginning */
+ if (fullframe) {
+ frame->curline = 0;
+ frame->scanlength = 0;
+ }
+
+ /* Form every scan line */
+ for (; frame->curline < imgheight; frame->curline++) {
+ int i;
+
+ f = frame->data + (imgwidth * 3 * frame->curline);
+ for (i=0; i < imgwidth; 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->grabstate = FRAME_DONE;
+ frame->scanlength += scan_length;
+ ++num_pass;
+
+ /* We do this unconditionally, regardless of FLAGS_OVERLAY_STATS */
+ usb_ibmcam_overlaystats(ibmcam, frame);
+}
+
+static unsigned char *ibmcam_model1_find_header(unsigned char hdr_sig, unsigned char *data, int len)
+{
+ while (len >= 4)
+ {
+ if ((data[0] == 0x00) && (data[1] == 0xFF) && (data[2] == 0x00))
+ {
+#if 0
+ /* This code helps to detect new frame markers */
+ printk(KERN_DEBUG "Header sig: 00 FF 00 %02X\n", data[3]);
+#endif
+ if (data[3] == hdr_sig) {
+ if (debug > 2)
+ printk(KERN_DEBUG "Header found.\n");
+ return data+4;
+ }
+ }
+ ++data;
+ --len;
+ }
+ return NULL;
+}
+
+static unsigned char *ibmcam_model2_find_header(unsigned char hdr_sig, unsigned char *data, int len)
+{
+ int marker_len = 0;
+
+ switch (videosize) {
+ case VIDEOSIZE_176x144:
+ marker_len = 10;
+ break;
+ default:
+ marker_len = 2;
+ break;
+ }
+ while (len >= marker_len)
+ {
+ if ((data[0] == 0x00) && (data[1] == 0xFF))
+ {
+#if 0
+ /* This code helps to detect new frame markers */
+ static int pass = 0;
+ if (pass++ == 0)
+ ibmcam_hexdump(data, (len > 16) ? 16 : len);
+#endif
+ if (debug > 2)
+ printk(KERN_DEBUG "Header found.\n");
+ return data+marker_len;
+ }
+ ++data;
+ --len;
+ }
+ return NULL;
+}
+
+/* How much data is left in the scratch buf? */
+#define scratch_left(x) (ibmcam->scratchlen - (int)((char *)x - (char *)ibmcam->scratch))
+
+/* Grab the remaining */
+static void usb_ibmcam_align_scratch(struct usb_ibmcam *ibmcam, unsigned char *data)
+{
+ unsigned long left;
+
+ left = scratch_left(data);
+ memmove(ibmcam->scratch, data, left);
+ ibmcam->scratchlen = left;
+}
+
+/*
+ * usb_ibmcam_find_header()
+ *
+ * Locate one of supported header markers in the scratch buffer.
+ * Once found, remove all preceding bytes AND the marker (4 bytes)
+ * from the scratch buffer. Whatever follows must be video lines.
+ *
+ * History:
+ * 1/21/00 Created.
+ */
+static scan_state_t usb_ibmcam_find_header(struct usb_ibmcam *ibmcam)
+{
+ struct ibmcam_frame *frame;
+ unsigned char *data, *tmp;
+
+ data = ibmcam->scratch;
+ frame = &ibmcam->frame[ibmcam->curframe];
+
+ if (ibmcam->camera_model == IBMCAM_MODEL_1)
+ tmp = ibmcam_model1_find_header(frame->hdr_sig, data, scratch_left(data));
+ else if (ibmcam->camera_model == IBMCAM_MODEL_2)
+ tmp = ibmcam_model2_find_header(frame->hdr_sig, data, scratch_left(data));
+ else
+ tmp = NULL;
+
+ if (tmp == NULL) {
+ /* No header - entire scratch buffer is useless! */
+ if (debug > 2)
+ printk(KERN_DEBUG "Skipping frame, no header\n");
+ ibmcam->scratchlen = 0;
+ return scan_EndParse;
+ }
+ /* Header found */
+ data = tmp;
+
+ ibmcam->has_hdr = 1;
+ ibmcam->header_count++;
+ frame->scanstate = STATE_LINES;
+ frame->curline = 0;
+
+ if (flags & FLAGS_FORCE_TESTPATTERN) {
+ usb_ibmcam_testpattern(ibmcam, 1, 1);
+ return scan_NextFrame;
+ }
+ usb_ibmcam_align_scratch(ibmcam, data);
+ return scan_Continue;
+}
+
+/*
+ * usb_ibmcam_parse_lines()
+ *
+ * Parse one line (TODO: more than one!) from the scratch buffer, put
+ * decoded RGB value into the current frame buffer and add the written
+ * number of bytes (RGB) to the *pcopylen.
+ *
+ * History:
+ * 1/21/00 Created.
+ */
+static scan_state_t usb_ibmcam_parse_lines(struct usb_ibmcam *ibmcam, long *pcopylen)
+{
+ struct ibmcam_frame *frame;
+ unsigned char *data, *f, *chromaLine;
+ unsigned int len;
+ const int v4l_linesize = imgwidth * V4L_BYTES_PER_PIXEL; /* V4L line offset */
+ const int hue_corr = (ibmcam->vpic.hue - 0x8000) >> 10; /* -32..+31 */
+ const int hue2_corr = (hue_correction - 128) / 4; /* -32..+31 */
+ const int ccm = 128; /* Color correction median - see below */
+ int y, u, v, i, frame_done=0, mono_plane, color_corr;
+
+ color_corr = (ibmcam->vpic.colour - 0x8000) >> 8; /* -128..+127 = -ccm..+(ccm-1)*/
+ RESTRICT_TO_RANGE(color_corr, -ccm, ccm+1);
+ data = ibmcam->scratch;
+ frame = &ibmcam->frame[ibmcam->curframe];
+
+ len = frame->frmwidth * 3; /* 1 line of mono + 1 line of color */
+ /*printk(KERN_DEBUG "len=%d. left=%d.\n",len,scratch_left(data));*/
+
+ mono_plane = ((frame->curline & 1) == 0);
+
+ /*
+ * Lines are organized this way (or are they?)
+ *
+ * I420:
+ * ~~~~
+ * ___________________________________
+ * |-----Y-----|---UVUVUV...UVUV-----| \
+ * |-----------+---------------------| \
+ * |<-- 176 -->|<------ 176*2 ------>| Total 72. pairs of lines
+ * |... ... ...| /
+ * |___________|_____________________| /
+ * - odd line- ------- even line ---
+ *
+ * another format:
+ * ~~~~~~~~~~~~~~
+ * ___________________________________
+ * |-----Y-----|---UVUVUV...UVUV-----| \
+ * |-----------+---------------------| \
+ * |<-- 352 -->|<------ 352*2 ------>| Total 144. pairs of lines
+ * |... ... ...| /
+ * |___________|_____________________| /
+ * - odd line- ------- even line ---
+ */
+
+ /* Make sure there's enough data for the entire line */
+ if (scratch_left(data) < (len+1024)) {
+ /*printk(KERN_DEBUG "out of data, need %u.\n", len);*/
+ return scan_Out;
+ }
+
+#if 0
+ { /* This code prints beginning of the source frame */
+ static int pass = 0;
+ if ((pass++ % 3000) == 0)
+ ibmcam_hexdump(data, 16);
+ }
+#endif
+
+#if 0
+ if (frame->curline == 10 || frame->curline == 11) {
+ /* This code prints beginning of 10th (mono), 11th (chroma) line */
+ static int pass = 0;
+ if ((pass % 100) == 0)
+ ibmcam_hexdump(data, 16);
+ if (frame->curline == 11)
+ pass++;
+ }
+#endif
+ /*
+ * Make sure that our writing into output buffer
+ * will not exceed the buffer. Mind that we may write
+ * not into current output scanline but in several after
+ * it as well (if we enlarge image vertically.)
+ */
+ if ((frame->curline + 1) >= V4L_FRAME_HEIGHT)
+ return scan_NextFrame;
+
+ /*
+ * Now we are sure that entire line (representing all 'frame->frmwidth'
+ * pixels from the camera) is available in the scratch buffer. We
+ * start copying the line left-aligned to the V4L buffer (which
+ * might be larger - not smaller, hopefully). If the camera
+ * line is shorter then we should pad the V4L buffer with something
+ * (black in this case) to complete the line.
+ */
+ f = frame->data + (v4l_linesize * frame->curline);
+
+ /*
+ * chromaLine points to 1st pixel of the line with chrominance.
+ * If current line is monochrome then chromaLine points to next
+ * line after monochrome one. If current line has chrominance
+ * then chromaLine points to this very line. Such method allows
+ * to access chrominance data uniformly.
+ *
+ * To obtain chrominance data from the 'chromaLine' use this:
+ * v = chromaLine[0]; // 0-1:[0], 2-3:[4], 4-5:[8]...
+ * u = chromaLine[2]; // 0-1:[2], 2-3:[6], 4-5:[10]...
+ *
+ * Indices must be calculated this way:
+ * v_index = (i >> 1) << 2;
+ * u_index = (i >> 1) << 2 + 2;
+ *
+ * where 'i' is the column number [0..frame->frmwidth-1]
+ */
+ chromaLine = data;
+ if (mono_plane)
+ chromaLine += frame->frmwidth;
+
+ for (i = 0; i < frame->frmwidth; i++, data += (mono_plane ? 1 : 2))
+ {
+ unsigned char rv, gv, bv; /* RGB components */
+
+ /*
+ * Search for potential Start-Of-Frame marker. It should
+ * not be here, of course, but if your formats don't match
+ * you might exceed the frame. We must match the marker to
+ * each byte of multi-byte data element if it is multi-byte.
+ */
+#if 1
+ if ((ibmcam->camera_model == IBMCAM_MODEL_1) && (scratch_left(data) >= (4+2))) {
+ unsigned char *dp;
+ int j;
+
+ for (j=0, dp=data; j < 2; j++, dp++) {
+ if ((dp[0] == 0x00) && (dp[1] == 0xFF) &&
+ (dp[2] == 0x00) && (dp[3] == frame->hdr_sig)) {
+ ibmcam->has_hdr = 2;
+ frame_done++;
+ break;
+ }
+ }
+ }
+#endif
+
+ /* Check for various visual debugging hints (colorized pixels) */
+ if ((flags & FLAGS_DISPLAY_HINTS) && (ibmcam->has_hdr)) {
+ /*
+ * This is bad and should not happen. This means that
+ * we somehow overshoot the line and encountered new
+ * frame! Obviously our camera/V4L frame size is out
+ * of whack. This cyan dot will help you to figure
+ * out where exactly the new frame arrived.
+ */
+ if (ibmcam->has_hdr == 1) {
+ bv = 0; /* Yellow marker */
+ gv = 0xFF;
+ rv = 0xFF;
+ } else {
+ bv = 0xFF; /* Cyan marker */
+ gv = 0xFF;
+ rv = 0;
+ }
+ ibmcam->has_hdr = 0;
+ goto make_pixel;
+ }
+
+ if (mono_plane || frame->order_yc)
+ y = data[0];
+ else
+ y = data[1];
+
+ if (flags & FLAGS_MONOCHROME) /* Use monochrome for debugging */
+ rv = gv = bv = y;
+ else {
+ int off_0, off_2;
+
+ off_0 = (i >> 1) << 2;
+ off_2 = off_0 + 2;
+
+ if (frame->order_yc) {
+ off_0++;
+ off_2++;
+ }
+ if (!frame->order_uv) {
+ off_0 += 2;
+ off_2 -= 2;
+ }
+ u = chromaLine[off_0] + hue_corr;
+ v = chromaLine[off_2] + hue2_corr;
+
+ /* Apply color correction */
+ if (color_corr != 0) {
+ /* Magnify up to 2 times, reduce down to zero saturation */
+ u = 128 + ((ccm + color_corr) * (u - 128)) / ccm;
+ v = 128 + ((ccm + color_corr) * (v - 128)) / ccm;
+ }
+ YUV_TO_RGB_BY_THE_BOOK(y, u, v, rv, gv, bv);
+ }
+
+ make_pixel:
+ /*
+ * The purpose of creating the pixel here, in one,
+ * dedicated place is that we may need to make the
+ * pixel wider and taller than it actually is. This
+ * may be used if camera generates small frames for
+ * sake of frame rate (or any other reason.)
+ *
+ * The output data consists of B, G, R bytes
+ * (in this order).
+ */
+#if USES_IBMCAM_PUTPIXEL
+ IBMCAM_PUTPIXEL(frame, i, frame->curline, rv, gv, bv);
+#else
+ *f++ = bv;
+ *f++ = gv;
+ *f++ = rv;
+#endif
+ /*
+ * Typically we do not decide within a legitimate frame
+ * that we want to end the frame. However debugging code
+ * may detect marker of new frame within the data. Then
+ * this condition activates. The 'data' pointer is already
+ * pointing at the new marker, so we'd better leave it as is.
+ */
+ if (frame_done)
+ break; /* End scanning of lines */
+ }
+ /*
+ * Account for number of bytes that we wrote into output V4L frame.
+ * We do it here, after we are done with the scanline, because we
+ * may fill more than one output scanline if we do vertical
+ * enlargement.
+ */
+ frame->curline++;
+ *pcopylen += v4l_linesize;
+ usb_ibmcam_align_scratch(ibmcam, data);
+
+ if (frame_done || (frame->curline >= frame->frmheight))
+ return scan_NextFrame;
+ else
+ return scan_Continue;
+}
+
+/*
+ * usb_ibmcam_model2_parse_lines()
+ *
+ * This procedure deals with a weird RGB format that is produced by IBM
+ * camera model 2 in modes 320x240 and above; 'x' below is 159 or 175,
+ * depending on horizontal size of the picture:
+ *
+ * <--- 160 or 176 pairs of RA,RB bytes ----->
+ * *-----------------------------------------* \
+ * | RA0 | RB0 | RA1 | RB1 | ... | RAx | RBx | \
+ * |-----+-----+-----+-----+ ... +-----+-----| *- This is pair of horizontal lines,
+ * | B0 | G0 | B1 | G1 | ... | Bx | Gx | / total 240 or 288 lines (120 or 144
+ * |=====+=====+=====+=====+ ... +=====+=====| / such pairs).
+ *
+ * Each group of FOUR bytes (RAi, RBi, Bi, Gi) where i=0..frame_width/2-1
+ * defines ONE pixel. Therefore this format yields 176x144 "decoded"
+ * resolution at best. I do not know why camera sends such format - the
+ * previous model just used I420 and everyone was happy.
+ *
+ * I do not know what is the difference between RAi and RBi bytes. Both
+ * seemingly represent R component, but slightly vary in value (so that
+ * the picture looks a bit colored if one or another is used). I use
+ * them both as R component in attempt to at least partially recover the
+ * lost resolution.
+ */
+static scan_state_t usb_ibmcam_model2_parse_lines(struct usb_ibmcam *ibmcam, long *pcopylen)
+{
+ struct ibmcam_frame *frame;
+ unsigned char *data, *f, *la, *lb;
+ unsigned int len;
+ const int v4l_linesize = imgwidth * V4L_BYTES_PER_PIXEL; /* V4L line offset */
+ int i, j, frame_done=0, color_corr;
+
+ color_corr = (ibmcam->vpic.colour) >> 8; /* 0..+255 */
+
+ data = ibmcam->scratch;
+ frame = &ibmcam->frame[ibmcam->curframe];
+
+ /* Here we deal with pairs of horizontal lines */
+
+ len = frame->frmwidth * 2; /* 2 lines */
+ /*printk(KERN_DEBUG "len=%d. left=%d.\n",len,scratch_left(data));*/
+
+ /* Make sure there's enough data for the entire line */
+ if (scratch_left(data) < (len+32)) {
+ /*printk(KERN_DEBUG "out of data, need %u.\n", len);*/
+ return scan_Out;
+ }
+
+ /*
+ * Make sure that our writing into output buffer
+ * will not exceed the buffer. Mind that we may write
+ * not into current output scanline but in several after
+ * it as well (if we enlarge image vertically.)
+ */
+ if ((frame->curline + 1) >= V4L_FRAME_HEIGHT)
+ return scan_NextFrame;
+
+ if ((frame->curline & 1) == 0) {
+ la = data;
+ lb = data + frame->frmwidth;
+ } else {
+ la = data + frame->frmwidth;
+ lb = data;
+ }
+
+ /*
+ * Now we are sure that entire line (representing all 'frame->frmwidth'
+ * pixels from the camera) is available in the scratch buffer. We
+ * start copying the line left-aligned to the V4L buffer (which
+ * might be larger - not smaller, hopefully). If the camera
+ * line is shorter then we should pad the V4L buffer with something
+ * (black in this case) to complete the line.
+ */
+ f = frame->data + (v4l_linesize * frame->curline);
+
+ /* Fill the 2-line strip */
+ for (i = 0; i < frame->frmwidth; i++) {
+ int y, rv, gv, bv; /* RGB components */
+
+ j = i & (~1);
+
+ /* Check for various visual debugging hints (colorized pixels) */
+ if ((flags & FLAGS_DISPLAY_HINTS) && (ibmcam->has_hdr)) {
+ if (ibmcam->has_hdr == 1) {
+ bv = 0; /* Yellow marker */
+ gv = 0xFF;
+ rv = 0xFF;
+ } else {
+ bv = 0xFF; /* Cyan marker */
+ gv = 0xFF;
+ rv = 0;
+ }
+ ibmcam->has_hdr = 0;
+ goto make_pixel;
+ }
+
+ /*
+ * Here I use RA and RB components, one per physical pixel.
+ * This causes fine vertical grid on the picture but may improve
+ * horizontal resolution. If you prefer replicating, use this:
+ * rv = la[j + 0]; ... or ... rv = la[j + 1];
+ * then the pixel will be replicated.
+ */
+ rv = la[i];
+ gv = lb[j + 1];
+ bv = lb[j + 0];
+
+ y = (rv + gv + bv) / 3; /* Brightness (badly calculated) */
+
+ if (flags & FLAGS_MONOCHROME) /* Use monochrome for debugging */
+ rv = gv = bv = y;
+ else if (color_corr != 128) {
+
+ /* Calculate difference between color and brightness */
+ rv -= y;
+ gv -= y;
+ bv -= y;
+
+ /* Scale differences */
+ rv = (rv * color_corr) / 128;
+ gv = (gv * color_corr) / 128;
+ bv = (bv * color_corr) / 128;
+
+ /* Reapply brightness */
+ rv += y;
+ gv += y;
+ bv += y;
+
+ /* Watch for overflows */
+ RESTRICT_TO_RANGE(rv, 0, 255);
+ RESTRICT_TO_RANGE(gv, 0, 255);
+ RESTRICT_TO_RANGE(bv, 0, 255);
+ }
+
+ make_pixel:
+ IBMCAM_PUTPIXEL(frame, i, frame->curline, rv, gv, bv);
+ IBMCAM_PUTPIXEL(frame, i, frame->curline+1, rv, gv, bv);
+ }
+ /*
+ * Account for number of bytes that we wrote into output V4L frame.
+ * We do it here, after we are done with the scanline, because we
+ * may fill more than one output scanline if we do vertical
+ * enlargement.
+ */
+ frame->curline += 2;
+ *pcopylen += v4l_linesize * 2;
+ data += frame->frmwidth * 2;
+ usb_ibmcam_align_scratch(ibmcam, data);
+
+ if (frame_done || (frame->curline >= frame->frmheight))
+ return scan_NextFrame;
+ else
+ return scan_Continue;
+}
+
+/*
+ * ibmcam_parse_data()
+ *
+ * Generic routine to parse the scratch buffer. It employs either
+ * usb_ibmcam_find_header() or usb_ibmcam_parse_lines() to do most
+ * of work.
+ *
+ * History:
+ * 1/21/00 Created.
+ */
+static void ibmcam_parse_data(struct usb_ibmcam *ibmcam)
+{
+ struct ibmcam_frame *frame;
+ unsigned char *data = ibmcam->scratch;
+ scan_state_t newstate;
+ long copylen = 0;
+
+ /* Grab the current frame and the previous frame */
+ frame = &ibmcam->frame[ibmcam->curframe];
+
+ /* printk(KERN_DEBUG "parsing %u.\n", ibmcam->scratchlen); */
+
+ while (1) {
+
+ newstate = scan_Out;
+ if (scratch_left(data)) {
+ if (frame->scanstate == STATE_SCANNING)
+ newstate = usb_ibmcam_find_header(ibmcam);
+ else if (frame->scanstate == STATE_LINES) {
+ if ((ibmcam->camera_model == IBMCAM_MODEL_2) &&
+ (videosize >= VIDEOSIZE_352x288)) {
+ newstate = usb_ibmcam_model2_parse_lines(ibmcam, ©len);
+ }
+ else {
+ newstate = usb_ibmcam_parse_lines(ibmcam, ©len);
+ }
+ }
+ }
+ if (newstate == scan_Continue)
+ continue;
+ else if ((newstate == scan_NextFrame) || (newstate == scan_Out))
+ break;
+ else
+ return; /* scan_EndParse */
+ }
+
+ if (newstate == scan_NextFrame) {
+ frame->grabstate = FRAME_DONE;
+ ibmcam->curframe = -1;
+ ibmcam->frame_num++;
+
+ /* Optionally display statistics on the screen */
+ if (flags & FLAGS_OVERLAY_STATS)
+ usb_ibmcam_overlaystats(ibmcam, frame);
+
+ /* This will cause the process to request another frame. */
+ if (waitqueue_active(&frame->wq))
+ wake_up_interruptible(&frame->wq);
+ }
+
+ /* Update the frame's uncompressed length. */
+ frame->scanlength += copylen;
+}
+
+/*
+ * Make all of the blocks of data contiguous
+ */
+static int ibmcam_compress_isochronous(struct usb_ibmcam *ibmcam, urb_t *urb)
+{
+ unsigned char *cdata, *data, *data0;
+ int i, totlen = 0;
+
+ data = data0 = ibmcam->scratch + ibmcam->scratchlen;
+ for (i = 0; i < urb->number_of_packets; i++) {
+ int n = urb->iso_frame_desc[i].actual_length;
+ int st = urb->iso_frame_desc[i].status;
+
+ cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+
+ /* Detect and ignore errored packets */
+ if (st < 0) {
+ if (debug >= 1) {
+ printk(KERN_ERR "ibmcam data error: [%d] len=%d, status=%X\n",
+ i, n, st);
+ }
+ ibmcam->iso_err_count++;
+ continue;
+ }
+
+ /* Detect and ignore empty packets */
+ if (n <= 0) {
+ ibmcam->iso_skip_count++;
+ continue;
+ }
+
+ /*
+ * If camera continues to feed us with data but there is no
+ * consumption (if, for example, V4L client fell asleep) we
+ * may overflow the buffer. We have to move old data over to
+ * free room for new data. This is bad for old data. If we
+ * just drop new data then it's bad for new data... choose
+ * your favorite evil here.
+ */
+ if ((ibmcam->scratchlen + n) > scratchbufsize) {
+#if 0
+ ibmcam->scratch_ovf_count++;
+ if (debug >= 3)
+ printk(KERN_ERR "ibmcam: scratch buf overflow! "
+ "scr_len: %d, n: %d\n", ibmcam->scratchlen, n );
+ return totlen;
+#else
+ int mv;
+
+ ibmcam->scratch_ovf_count++;
+ if (debug >= 3) {
+ printk(KERN_ERR "ibmcam: scratch buf overflow! "
+ "scr_len: %d, n: %d\n", ibmcam->scratchlen, n );
+ }
+ mv = (ibmcam->scratchlen + n) - scratchbufsize;
+ if (ibmcam->scratchlen >= mv) {
+ int newslen = ibmcam->scratchlen - mv;
+ memmove(ibmcam->scratch, ibmcam->scratch + mv, newslen);
+ ibmcam->scratchlen = newslen;
+ data = data0 = ibmcam->scratch + ibmcam->scratchlen;
+ } else {
+ printk(KERN_ERR "ibmcam: scratch buf too small\n");
+ return totlen;
+ }
+#endif
+ }
+
+ /* Now we know that there is enough room in scratch buffer */
+ memmove(data, cdata, n);
+ data += n;
+ totlen += n;
+ ibmcam->scratchlen += n;
+ }
+#if 0
+ if (totlen > 0) {
+ static int foo=0;
+ if (foo < 1) {
+ printk(KERN_DEBUG "+%d.\n", totlen);
+ ibmcam_hexdump(data0, (totlen > 64) ? 64:totlen);
+ ++foo;
+ }
+ }
+#endif
+ return totlen;
+}
+
+static void ibmcam_isoc_irq(struct urb *urb)
+{
+ int len;
+ struct usb_ibmcam *ibmcam = urb->context;
+ struct ibmcam_sbuf *sbuf;
+ int i;
+
+ /* We don't want to do anything if we are about to be removed! */
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam))
+ return;
+
+#if 0
+ if (urb->actual_length > 0) {
+ printk(KERN_DEBUG "ibmcam_isoc_irq: %p status %d, "
+ " errcount = %d, length = %d\n", urb, urb->status,
+ urb->error_count, urb->actual_length);
+ } else {
+ static int c = 0;
+ if (c++ % 100 == 0)
+ printk(KERN_DEBUG "ibmcam_isoc_irq: no data\n");
+ }
+#endif
+
+ if (!ibmcam->streaming) {
+ if (debug >= 1)
+ printk(KERN_DEBUG "ibmcam: oops, not streaming, but interrupt\n");
+ return;
+ }
+
+ sbuf = &ibmcam->sbuf[ibmcam->cursbuf];
+
+ /* Copy the data received into our scratch buffer */
+ len = ibmcam_compress_isochronous(ibmcam, urb);
+
+ ibmcam->urb_count++;
+ ibmcam->urb_length = len;
+ ibmcam->data_count += len;
+
+#if 0 /* This code prints few initial bytes of ISO data: used to decode markers */
+ if (ibmcam->urb_count % 64 == 1) {
+ if (ibmcam->urb_count == 1) {
+ ibmcam_hexdump(ibmcam->scratch,
+ (ibmcam->scratchlen > 32) ? 32 : ibmcam->scratchlen);
+ }
+ }
+#endif
+
+ /* If we collected enough data let's parse! */
+ if (ibmcam->scratchlen) {
+ /* If we don't have a frame we're current working on, complain */
+ if (ibmcam->curframe >= 0)
+ ibmcam_parse_data(ibmcam);
+ else {
+ if (debug >= 1)
+ printk(KERN_DEBUG "ibmcam: received data, but no frame available\n");
+ }
+ }
+
+ for (i = 0; i < FRAMES_PER_DESC; i++) {
+ sbuf->urb->iso_frame_desc[i].status = 0;
+ sbuf->urb->iso_frame_desc[i].actual_length = 0;
+ }
+
+ /* Move to the next sbuf */
+ ibmcam->cursbuf = (ibmcam->cursbuf + 1) % IBMCAM_NUMSBUF;
+
+ return;
+}
+
+/*
+ * usb_ibmcam_veio()
+ *
+ * History:
+ * 1/27/00 Added check for dev == NULL; this happens if camera is unplugged.
+ */
+static int usb_ibmcam_veio(
+ struct usb_ibmcam *ibmcam,
+ unsigned char req,
+ unsigned short value,
+ unsigned short index)
+{
+ static const char proc[] = "usb_ibmcam_veio";
+ unsigned char cp[8] /* = { 0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xbe, 0xef } */;
+ int i;
+
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam))
+ return 0;
+
+ if (req == 1) {
+ i = usb_control_msg(
+ ibmcam->dev,
+ usb_rcvctrlpipe(ibmcam->dev, 0),
+ req,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
+ value,
+ index,
+ cp,
+ sizeof(cp),
+ HZ);
+#if 0
+ printk(KERN_DEBUG "USB => %02x%02x%02x%02x%02x%02x%02x%02x "
+ "(req=$%02x val=$%04x ind=$%04x)\n",
+ cp[0],cp[1],cp[2],cp[3],cp[4],cp[5],cp[6],cp[7],
+ req, value, index);
+#endif
+ } else {
+ i = usb_control_msg(
+ ibmcam->dev,
+ usb_sndctrlpipe(ibmcam->dev, 0),
+ req,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
+ value,
+ index,
+ NULL,
+ 0,
+ HZ);
+ }
+ if (i < 0) {
+ printk(KERN_ERR "%s: ERROR=%d. Camera stopped - "
+ "reconnect or reload driver.\n", proc, i);
+ ibmcam->last_error = i;
+ }
+ return i;
+}
+
+/*
+ * usb_ibmcam_calculate_fps()
+ *
+ * This procedure roughly calculates the real frame rate based
+ * on FPS code (framerate=NNN option). Actual FPS differs
+ * slightly depending on lighting conditions, so that actual frame
+ * rate is determined by the camera. Since I don't know how to ask
+ * the camera what FPS is now I have to use the FPS code instead.
+ *
+ * The FPS code is in range [0..6], 0 is slowest, 6 is fastest.
+ * Corresponding real FPS should be in range [3..30] frames per second.
+ * The conversion formula is obvious:
+ *
+ * real_fps = 3 + (fps_code * 4.5)
+ *
+ * History:
+ * 1/18/00 Created.
+ */
+static int usb_ibmcam_calculate_fps(void)
+{
+ return 3 + framerate*4 + framerate/2;
+}
+
+/*
+ * usb_ibmcam_send_FF_04_02()
+ *
+ * This procedure sends magic 3-command prefix to the camera.
+ * The purpose of this prefix is not known.
+ *
+ * History:
+ * 1/2/00 Created.
+ */
+static void usb_ibmcam_send_FF_04_02(struct usb_ibmcam *ibmcam)
+{
+ usb_ibmcam_veio(ibmcam, 0, 0x00FF, 0x0127);
+ usb_ibmcam_veio(ibmcam, 0, 0x0004, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0002, 0x0124);
+}
+
+static void usb_ibmcam_send_00_04_06(struct usb_ibmcam *ibmcam)
+{
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0127);
+ usb_ibmcam_veio(ibmcam, 0, 0x0004, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0006, 0x0124);
+}
+
+static void usb_ibmcam_send_x_00(struct usb_ibmcam *ibmcam, unsigned short x)
+{
+ usb_ibmcam_veio(ibmcam, 0, x, 0x0127);
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0124);
+}
+
+static void usb_ibmcam_send_x_00_05(struct usb_ibmcam *ibmcam, unsigned short x)
+{
+ usb_ibmcam_send_x_00(ibmcam, x);
+ usb_ibmcam_veio(ibmcam, 0, 0x0005, 0x0124);
+}
+
+static void usb_ibmcam_send_x_00_05_02(struct usb_ibmcam *ibmcam, unsigned short x)
+{
+ usb_ibmcam_veio(ibmcam, 0, x, 0x0127);
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0005, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0002, 0x0124);
+}
+
+static void usb_ibmcam_send_x_01_00_05(struct usb_ibmcam *ibmcam, unsigned short x)
+{
+ usb_ibmcam_veio(ibmcam, 0, x, 0x0127);
+ usb_ibmcam_veio(ibmcam, 0, 0x0001, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0005, 0x0124);
+}
+
+static void usb_ibmcam_send_x_00_05_02_01(struct usb_ibmcam *ibmcam, unsigned short x)
+{
+ usb_ibmcam_veio(ibmcam, 0, x, 0x0127);
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0005, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0002, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0001, 0x0124);
+}
+
+static void usb_ibmcam_send_x_00_05_02_08_01(struct usb_ibmcam *ibmcam, unsigned short x)
+{
+ usb_ibmcam_veio(ibmcam, 0, x, 0x0127);
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0005, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0002, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0008, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, 0x0001, 0x0124);
+}
+
+static void usb_ibmcam_Packet_Format1(struct usb_ibmcam *ibmcam, unsigned char fkey, unsigned char val)
+{
+ usb_ibmcam_send_x_01_00_05 (ibmcam, unknown_88);
+ usb_ibmcam_send_x_00_05 (ibmcam, fkey);
+ usb_ibmcam_send_x_00_05_02_08_01(ibmcam, val);
+ usb_ibmcam_send_x_00_05 (ibmcam, unknown_88);
+ usb_ibmcam_send_x_00_05_02_01 (ibmcam, fkey);
+ usb_ibmcam_send_x_00_05 (ibmcam, unknown_89);
+ usb_ibmcam_send_x_00 (ibmcam, fkey);
+ usb_ibmcam_send_00_04_06 (ibmcam);
+ usb_ibmcam_veio (ibmcam, 1, 0x0000, 0x0126);
+ usb_ibmcam_send_FF_04_02 (ibmcam);
+}
+
+static void usb_ibmcam_PacketFormat2(struct usb_ibmcam *ibmcam, unsigned char fkey, unsigned char val)
+{
+ usb_ibmcam_send_x_01_00_05 (ibmcam, unknown_88);
+ usb_ibmcam_send_x_00_05 (ibmcam, fkey);
+ usb_ibmcam_send_x_00_05_02 (ibmcam, val);
+}
+
+static void usb_ibmcam_model2_Packet2(struct usb_ibmcam *ibmcam)
+{
+ usb_ibmcam_veio(ibmcam, 0, 0x00ff, 0x012d);
+ usb_ibmcam_veio(ibmcam, 0, 0xfea3, 0x0124);
+}
+
+static void usb_ibmcam_model2_Packet1(struct usb_ibmcam *ibmcam, unsigned short v1, unsigned short v2)
+{
+ usb_ibmcam_veio(ibmcam, 0, 0x00aa, 0x012d);
+ usb_ibmcam_veio(ibmcam, 0, 0x00ff, 0x012e);
+ usb_ibmcam_veio(ibmcam, 0, v1, 0x012f);
+ usb_ibmcam_veio(ibmcam, 0, 0x00ff, 0x0130);
+ usb_ibmcam_veio(ibmcam, 0, 0xc719, 0x0124);
+ usb_ibmcam_veio(ibmcam, 0, v2, 0x0127);
+
+ usb_ibmcam_model2_Packet2(ibmcam);
+}
+
+/*
+ * usb_ibmcam_adjust_contrast()
+ *
+ * The contrast value changes from 0 (high contrast) to 15 (low contrast).
+ * This is in reverse to usual order of things (such as TV controls), so
+ * we reverse it again here.
+ *
+ * TODO: we probably don't need to send the setup 5 times...
+ *
+ * History:
+ * 1/2/00 Created.
+ */
+static void usb_ibmcam_adjust_contrast(struct usb_ibmcam *ibmcam)
+{
+ unsigned char new_contrast = ibmcam->vpic.contrast >> 12;
+ const int ntries = 5;
+
+ if (new_contrast >= 16)
+ new_contrast = 15;
+ new_contrast = 15 - new_contrast;
+ if (new_contrast != ibmcam->vpic_old.contrast) {
+ ibmcam->vpic_old.contrast = new_contrast;
+ if (ibmcam->camera_model == IBMCAM_MODEL_1) {
+ int i;
+ for (i=0; i < ntries; i++) {
+ usb_ibmcam_Packet_Format1(ibmcam, contrast_14, new_contrast);
+ usb_ibmcam_send_FF_04_02(ibmcam);
+ }
+ } else {
+ /* Camera model 2 does not have this control; implemented in software. */
+ }
+ }
+}
+
+/*
+ * usb_ibmcam_change_lighting_conditions()
+ *
+ * Camera model 1:
+ * We have 3 levels of lighting conditions: 0=Bright, 1=Medium, 2=Low.
+ *
+ * Camera model 2:
+ * We have 16 levels of lighting, 0 for bright light and up to 15 for
+ * low light. But values above 5 or so are useless because camera is
+ * not really capable to produce anything worth viewing at such light.
+ * This setting may be altered only in certain camera state.
+ *
+ * Low lighting forces slower FPS. Lighting is set as a module parameter.
+ *
+ * History:
+ * 1/5/00 Created.
+ * 2/20/00 Added support for Model 2 cameras.
+ */
+static void usb_ibmcam_change_lighting_conditions(struct usb_ibmcam *ibmcam)
+{
+ static const char proc[] = "usb_ibmcam_change_lighting_conditions";
+
+ if (debug > 0)
+ printk(KERN_INFO "%s: Set lighting to %hu.\n", proc, lighting);
+
+ if (ibmcam->camera_model == IBMCAM_MODEL_1) {
+ const int ntries = 5;
+ int i;
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, light_27, (unsigned short) lighting);
+ } else {
+ /*
+ * This command apparently requires camera to be stopped. My
+ * experiments showed that it -is- possible to alter the lighting
+ * conditions setting "on the fly", but why bother? This setting does
+ * not work reliably in all cases, so I decided simply to leave the
+ * setting where Xirlink put it - in the camera setup phase. This code
+ * is commented out because it does not work at -any- moment, so its
+ * presence makes no sense. You may use it for experiments.
+ */
+#if 0
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x010c); /* Stop camera */
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_sensitivity, lighting);
+ usb_ibmcam_veio(ibmcam, 0, 0x00c0, 0x010c); /* Start camera */
+#endif
+ }
+}
+
+/*
+ * usb_ibmcam_set_sharpness()
+ *
+ * Cameras model 1 have internal smoothing feature. It is controlled by value in
+ * range [0..6], where 0 is most smooth and 6 is most sharp (raw image, I guess).
+ * Recommended value is 4. Cameras model 2 do not have this feature at all.
+ */
+static void usb_ibmcam_set_sharpness(struct usb_ibmcam *ibmcam)
+{
+ static const char proc[] = "usb_ibmcam_set_sharpness";
+
+ if (ibmcam->camera_model == IBMCAM_MODEL_1) {
+ static const unsigned short sa[] = { 0x11, 0x13, 0x16, 0x18, 0x1a, 0x8, 0x0a };
+ unsigned short i, sv;
+
+ RESTRICT_TO_RANGE(sharpness, SHARPNESS_MIN, SHARPNESS_MAX);
+ if (debug > 0)
+ printk(KERN_INFO "%s: Set sharpness to %hu.\n", proc, sharpness);
+
+ sv = sa[sharpness - SHARPNESS_MIN];
+ for (i=0; i < 2; i++) {
+ usb_ibmcam_send_x_01_00_05 (ibmcam, unknown_88);
+ usb_ibmcam_send_x_00_05 (ibmcam, sharp_13);
+ usb_ibmcam_send_x_00_05_02 (ibmcam, sv);
+ }
+ } else {
+ /* Camera model 2 does not have this control */
+ }
+}
+
+/*
+ * usb_ibmcam_set_brightness()
+ *
+ * This procedure changes brightness of the picture.
+ */
+static void usb_ibmcam_set_brightness(struct usb_ibmcam *ibmcam)
+{
+ static const char proc[] = "usb_ibmcam_set_brightness";
+ static const unsigned short n = 1;
+ unsigned short i, j, bv[3];
+
+ bv[0] = bv[1] = bv[2] = ibmcam->vpic.brightness >> 10;
+ if (bv[0] == (ibmcam->vpic_old.brightness >> 10))
+ return;
+ ibmcam->vpic_old.brightness = ibmcam->vpic.brightness;
+
+ if (debug > 0)
+ printk(KERN_INFO "%s: Set brightness to (%hu,%hu,%hu)\n",
+ proc, bv[0], bv[1], bv[2]);
+
+ if (ibmcam->camera_model == IBMCAM_MODEL_1) {
+ for (j=0; j < 3; j++)
+ for (i=0; i < n; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, bright_3x[j], bv[j]);
+ } else {
+ i = ibmcam->vpic.brightness >> 12; /* 0 .. 15 */
+ j = 0x60 + i * ((0xee - 0x60) / 16); /* 0x60 .. 0xee or so */
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_brightness, j);
+ }
+}
+
+static void usb_ibmcam_model2_set_hue(struct usb_ibmcam *ibmcam)
+{
+ unsigned short hue = ibmcam->vpic.hue >> 9; /* 0 .. 7F */
+
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_color_balance_rg, hue);
+ /* usb_ibmcam_model2_Packet1(ibmcam, mod2_saturation, sat); */
+}
+
+/*
+ * usb_ibmcam_adjust_picture()
+ *
+ * This procedure gets called from V4L interface to update picture settings.
+ * Here we change brightness and contrast.
+ */
+static void usb_ibmcam_adjust_picture(struct usb_ibmcam *ibmcam)
+{
+ usb_ibmcam_adjust_contrast(ibmcam);
+ usb_ibmcam_set_brightness(ibmcam);
+ if (ibmcam->camera_model == IBMCAM_MODEL_2) {
+ usb_ibmcam_model2_set_hue(ibmcam);
+ }
+}
+
+static int usb_ibmcam_model1_setup(struct usb_ibmcam *ibmcam)
+{
+ const int ntries = 5;
+ int i;
+
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0128);
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0100);
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0100); /* LED On */
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0100);
+ usb_ibmcam_veio(ibmcam, 0, 0x81, 0x0100); /* LED Off */
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0100);
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0100); /* LED On */
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0108);
+
+ usb_ibmcam_veio(ibmcam, 0, 0x03, 0x0112);
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0115);
+ usb_ibmcam_veio(ibmcam, 0, 0x06, 0x0115);
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0116);
+ usb_ibmcam_veio(ibmcam, 0, 0x44, 0x0116);
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0116);
+ usb_ibmcam_veio(ibmcam, 0, 0x40, 0x0116);
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0115);
+ usb_ibmcam_veio(ibmcam, 0, 0x0e, 0x0115);
+ usb_ibmcam_veio(ibmcam, 0, 0x19, 0x012c);
+
+ usb_ibmcam_Packet_Format1(ibmcam, 0x00, 0x1e);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x39, 0x0d);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x39, 0x09);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x3b, 0x00);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x28, 0x22);
+ usb_ibmcam_Packet_Format1(ibmcam, light_27, 0);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2b, 0x1f);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x39, 0x08);
+
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2c, 0x00);
+
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x30, 0x14);
+
+ usb_ibmcam_PacketFormat2(ibmcam, 0x39, 0x02);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x01, 0xe1);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x02, 0xcd);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x03, 0xcd);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x04, 0xfa);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x3f, 0xff);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x39, 0x00);
+
+ usb_ibmcam_PacketFormat2(ibmcam, 0x39, 0x02);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x0a, 0x37);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x0b, 0xb8);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x0c, 0xf3);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x0d, 0xe3);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x0e, 0x0d);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x0f, 0xf2);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x10, 0xd5);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x11, 0xba);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x12, 0x53);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x3f, 0xff);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x39, 0x00);
+
+ usb_ibmcam_PacketFormat2(ibmcam, 0x39, 0x02);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x16, 0x00);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x17, 0x28);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x18, 0x7d);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x19, 0xbe);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x3f, 0xff);
+ usb_ibmcam_PacketFormat2(ibmcam, 0x39, 0x00);
+
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x00, 0x18);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x13, 0x18);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x14, 0x06);
+
+ /* This is default brightness */
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x31, 0x37);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x32, 0x46);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x33, 0x55);
+
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2e, 0x04);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2d, 0x04);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x29, 0x80);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2c, 0x01);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x30, 0x17);
+ usb_ibmcam_Packet_Format1(ibmcam, 0x39, 0x08);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x34, 0x00);
+
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x0101);
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x010a);
+
+ switch (videosize) {
+ case VIDEOSIZE_128x96:
+ usb_ibmcam_veio(ibmcam, 0, 0x80, 0x0103);
+ usb_ibmcam_veio(ibmcam, 0, 0x60, 0x0105);
+ usb_ibmcam_veio(ibmcam, 0, 0x0c, 0x010b);
+ usb_ibmcam_veio(ibmcam, 0, 0x04, 0x011b); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x0b, 0x011d);
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x011e); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x0129);
+ break;
+ case VIDEOSIZE_176x144:
+ usb_ibmcam_veio(ibmcam, 0, 0xb0, 0x0103);
+ usb_ibmcam_veio(ibmcam, 0, 0x8f, 0x0105);
+ usb_ibmcam_veio(ibmcam, 0, 0x06, 0x010b);
+ usb_ibmcam_veio(ibmcam, 0, 0x04, 0x011b); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x0d, 0x011d);
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x011e); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x03, 0x0129);
+ break;
+ case VIDEOSIZE_352x288:
+ usb_ibmcam_veio(ibmcam, 0, 0xb0, 0x0103);
+ usb_ibmcam_veio(ibmcam, 0, 0x90, 0x0105);
+ usb_ibmcam_veio(ibmcam, 0, 0x02, 0x010b);
+ usb_ibmcam_veio(ibmcam, 0, 0x04, 0x011b); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x05, 0x011d);
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x011e); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x0129);
+ break;
+ }
+
+ usb_ibmcam_veio(ibmcam, 0, 0xff, 0x012b);
+
+ /* This is another brightness - don't know why */
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x31, 0xc3);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x32, 0xd2);
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, 0x33, 0xe1);
+
+ /* Default contrast */
+ for (i=0; i < ntries; i++)
+ usb_ibmcam_Packet_Format1(ibmcam, contrast_14, 0x0a);
+
+ /* Default sharpness */
+ for (i=0; i < 2; i++)
+ usb_ibmcam_PacketFormat2(ibmcam, sharp_13, 0x1a); /* Level 4 FIXME */
+
+ /* Default lighting conditions */
+ usb_ibmcam_Packet_Format1(ibmcam, light_27, lighting); /* 0=Bright 2=Low */
+
+ /* Assorted init */
+
+ switch (videosize) {
+ case VIDEOSIZE_128x96:
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2b, 0x1e);
+ usb_ibmcam_veio(ibmcam, 0, 0xc9, 0x0119); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x80, 0x0109); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x36, 0x0102);
+ usb_ibmcam_veio(ibmcam, 0, 0x1a, 0x0104);
+ usb_ibmcam_veio(ibmcam, 0, 0x04, 0x011a); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x2b, 0x011c);
+ usb_ibmcam_veio(ibmcam, 0, 0x23, 0x012a); /* Same everywhere */
+#if 0
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x0106);
+ usb_ibmcam_veio(ibmcam, 0, 0x38, 0x0107);
+#else
+ usb_ibmcam_veio(ibmcam, 0, 0x02, 0x0106);
+ usb_ibmcam_veio(ibmcam, 0, 0x2a, 0x0107);
+#endif
+ break;
+ case VIDEOSIZE_176x144:
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2b, 0x1e);
+ usb_ibmcam_veio(ibmcam, 0, 0xc9, 0x0119); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x80, 0x0109); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x04, 0x0102);
+ usb_ibmcam_veio(ibmcam, 0, 0x02, 0x0104);
+ usb_ibmcam_veio(ibmcam, 0, 0x04, 0x011a); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x2b, 0x011c);
+ usb_ibmcam_veio(ibmcam, 0, 0x23, 0x012a); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0106);
+ usb_ibmcam_veio(ibmcam, 0, 0xca, 0x0107);
+ break;
+ case VIDEOSIZE_352x288:
+ usb_ibmcam_Packet_Format1(ibmcam, 0x2b, 0x1f);
+ usb_ibmcam_veio(ibmcam, 0, 0xc9, 0x0119); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x80, 0x0109); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x08, 0x0102);
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0104);
+ usb_ibmcam_veio(ibmcam, 0, 0x04, 0x011a); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x2f, 0x011c);
+ usb_ibmcam_veio(ibmcam, 0, 0x23, 0x012a); /* Same everywhere */
+ usb_ibmcam_veio(ibmcam, 0, 0x03, 0x0106);
+ usb_ibmcam_veio(ibmcam, 0, 0xf6, 0x0107);
+ break;
+ }
+ return IBMCAM_IS_OPERATIONAL(ibmcam);
+}
+
+static int usb_ibmcam_model2_setup(struct usb_ibmcam *ibmcam)
+{
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0100); /* LED on */
+ usb_ibmcam_veio(ibmcam, 1, 0x0000, 0x0116);
+ usb_ibmcam_veio(ibmcam, 0, 0x0060, 0x0116);
+ usb_ibmcam_veio(ibmcam, 0, 0x0002, 0x0112);
+ usb_ibmcam_veio(ibmcam, 0, 0x00bc, 0x012c);
+ usb_ibmcam_veio(ibmcam, 0, 0x0008, 0x012b);
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0108);
+ usb_ibmcam_veio(ibmcam, 0, 0x0001, 0x0133);
+ usb_ibmcam_veio(ibmcam, 0, 0x0001, 0x0102);
+ switch (videosize) {
+ case VIDEOSIZE_176x144:
+ usb_ibmcam_veio(ibmcam, 0, 0x002c, 0x0103); /* All except 320x240 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0104); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x0024, 0x0105); /* 176x144, 352x288 */
+ usb_ibmcam_veio(ibmcam, 0, 0x00b9, 0x010a); /* Unique to this mode */
+ usb_ibmcam_veio(ibmcam, 0, 0x0038, 0x0119); /* Unique to this mode */
+ usb_ibmcam_veio(ibmcam, 0, 0x0003, 0x0106); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x0090, 0x0107); /* Unique to every mode*/
+ break;
+ case VIDEOSIZE_320x240:
+ usb_ibmcam_veio(ibmcam, 0, 0x0028, 0x0103); /* Unique to this mode */
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0104); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x001e, 0x0105); /* 320x240, 352x240 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0039, 0x010a); /* All except 176x144 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0070, 0x0119); /* All except 176x144 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0003, 0x0106); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x0098, 0x0107); /* Unique to every mode*/
+ break;
+ case VIDEOSIZE_352x240:
+ usb_ibmcam_veio(ibmcam, 0, 0x002c, 0x0103); /* All except 320x240 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0104); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x001e, 0x0105); /* 320x240, 352x240 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0039, 0x010a); /* All except 176x144 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0070, 0x0119); /* All except 176x144 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0003, 0x0106); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x00da, 0x0107); /* Unique to every mode*/
+ break;
+ case VIDEOSIZE_352x288:
+ usb_ibmcam_veio(ibmcam, 0, 0x002c, 0x0103); /* All except 320x240 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0104); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x0024, 0x0105); /* 176x144, 352x288 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0039, 0x010a); /* All except 176x144 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0070, 0x0119); /* All except 176x144 */
+ usb_ibmcam_veio(ibmcam, 0, 0x0003, 0x0106); /* Same */
+ usb_ibmcam_veio(ibmcam, 0, 0x00fe, 0x0107); /* Unique to every mode*/
+ break;
+ }
+ return IBMCAM_IS_OPERATIONAL(ibmcam);
+}
+
+/*
+ * usb_ibmcam_model1_setup_after_video_if()
+ *
+ * This code adds finishing touches to the video data interface.
+ * Here we configure the frame rate and turn on the LED.
+ */
+static void usb_ibmcam_model1_setup_after_video_if(struct usb_ibmcam *ibmcam)
+{
+ unsigned short internal_frame_rate;
+
+ RESTRICT_TO_RANGE(framerate, FRAMERATE_MIN, FRAMERATE_MAX);
+ internal_frame_rate = FRAMERATE_MAX - framerate; /* 0=Fast 6=Slow */
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0100); /* LED On */
+ usb_ibmcam_veio(ibmcam, 0, internal_frame_rate, 0x0111);
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0114);
+ usb_ibmcam_veio(ibmcam, 0, 0xc0, 0x010c);
+}
+
+static void usb_ibmcam_model2_setup_after_video_if(struct usb_ibmcam *ibmcam)
+{
+ unsigned short setup_model2_rg, setup_model2_rg2, setup_model2_sat, setup_model2_yb;
+
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0100); /* LED on */
+
+ switch (videosize) {
+ case VIDEOSIZE_176x144:
+ usb_ibmcam_veio(ibmcam, 0, 0x0050, 0x0111);
+ usb_ibmcam_veio(ibmcam, 0, 0x00d0, 0x0111);
+ break;
+ case VIDEOSIZE_320x240:
+ case VIDEOSIZE_352x240:
+ case VIDEOSIZE_352x288:
+ usb_ibmcam_veio(ibmcam, 0, 0x0040, 0x0111);
+ usb_ibmcam_veio(ibmcam, 0, 0x00c0, 0x0111);
+ break;
+ }
+ usb_ibmcam_veio(ibmcam, 0, 0x009b, 0x010f);
+ usb_ibmcam_veio(ibmcam, 0, 0x00bb, 0x010f);
+
+ /*
+ * Hardware settings, may affect CMOS sensor; not user controls!
+ * -------------------------------------------------------------
+ * 0x0004: no effect
+ * 0x0006: hardware effect
+ * 0x0008: no effect
+ * 0x000a: stops video stream, probably important h/w setting
+ * 0x000c: changes color in hardware manner (not user setting)
+ * 0x0012: changes number of colors (does not affect speed)
+ * 0x002a: no effect
+ * 0x002c: hardware setting (related to scan lines)
+ * 0x002e: stops video stream, probably important h/w setting
+ */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x000a, 0x005c);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0004, 0x0000);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0006, 0x00fb);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0008, 0x0000);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x000c, 0x0009);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0012, 0x000a);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x002a, 0x0000);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x002c, 0x0000);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x002e, 0x0008);
+
+ /*
+ * Function 0x0030 pops up all over the place. Apparently
+ * it is a hardware control register, with every bit assigned to
+ * do something.
+ */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0030, 0x0000);
+
+ /*
+ * Magic control of CMOS sensor. Only lower values like
+ * 0-3 work, and picture shifts left or right. Don't change.
+ */
+ switch (videosize) {
+ case VIDEOSIZE_176x144:
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0014, 0x0002);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0016, 0x0002); /* Horizontal shift */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0018, 0x004a); /* Another hardware setting */
+ break;
+ case VIDEOSIZE_320x240:
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0014, 0x0009);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0016, 0x0005); /* Horizontal shift */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0018, 0x0044); /* Another hardware setting */
+ break;
+ case VIDEOSIZE_352x240:
+ /* This mode doesn't work as Windows programs it; changed to work */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0014, 0x0009); /* Windows sets this to 8 */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0016, 0x0003); /* Horizontal shift */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0018, 0x0044); /* Windows sets this to 0x0045 */
+ break;
+ case VIDEOSIZE_352x288:
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0014, 0x0003);
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0016, 0x0002); /* Horizontal shift */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0018, 0x004a); /* Another hardware setting */
+ break;
+ }
+
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_brightness, 0x005a);
+
+ /*
+ * We have our own frame rate setting varying from 0 (slowest) to 6 (fastest).
+ * The camera model 2 allows frame rate in range [0..0x1F] where 0 is also the
+ * slowest setting. However for all practical reasons high settings make no
+ * sense because USB is not fast enough to support high FPS. Be aware that
+ * the picture datastream will be severely disrupted if you ask for
+ * frame rate faster than allowed for the video size - see below:
+ *
+ * Allowable ranges (obtained experimentally on OHCI, K6-3, 450 MHz):
+ * -----------------------------------------------------------------
+ * 176x144: [6..31]
+ * 320x240: [8..31]
+ * 352x240: [10..31]
+ * 352x288: [16..31] I have to raise lower threshold for stability...
+ *
+ * As usual, slower FPS provides better sensitivity.
+ */
+ {
+ short hw_fps=31, i_framerate;
+
+ RESTRICT_TO_RANGE(framerate, FRAMERATE_MIN, FRAMERATE_MAX);
+ i_framerate = FRAMERATE_MAX - framerate + FRAMERATE_MIN;
+ switch (videosize) {
+ case VIDEOSIZE_176x144:
+ hw_fps = 6 + i_framerate*4;
+ break;
+ case VIDEOSIZE_320x240:
+ hw_fps = 8 + i_framerate*3;
+ break;
+ case VIDEOSIZE_352x240:
+ hw_fps = 10 + i_framerate*2;
+ break;
+ case VIDEOSIZE_352x288:
+ hw_fps = 28 + i_framerate/2;
+ break;
+ }
+ if (debug > 0)
+ printk(KERN_DEBUG "Framerate (hardware): %hd.\n", hw_fps);
+ RESTRICT_TO_RANGE(hw_fps, 0, 31);
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_set_framerate, hw_fps);
+ }
+
+ /*
+ * This setting does not visibly affect pictures; left it here
+ * because it was present in Windows USB data stream. This function
+ * does not allow arbitrary values and apparently is a bit mask, to
+ * be activated only at appropriate time. Don't change it randomly!
+ */
+ switch (videosize) {
+ case VIDEOSIZE_176x144:
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0026, 0x00c2);
+ break;
+ case VIDEOSIZE_320x240:
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0026, 0x0044);
+ break;
+ case VIDEOSIZE_352x240:
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0026, 0x0046);
+ break;
+ case VIDEOSIZE_352x288:
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0026, 0x0048);
+ break;
+ }
+
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_sensitivity, lighting);
+
+ if (init_model2_rg >= 0) {
+ RESTRICT_TO_RANGE(init_model2_rg, 0, 255);
+ setup_model2_rg = init_model2_rg;
+ } else
+ setup_model2_rg = 0x0070;
+
+ if (init_model2_rg2 >= 0) {
+ RESTRICT_TO_RANGE(init_model2_rg2, 0, 255);
+ setup_model2_rg2 = init_model2_rg2;
+ } else
+ setup_model2_rg2 = 0x002f;
+
+ if (init_model2_sat >= 0) {
+ RESTRICT_TO_RANGE(init_model2_sat, 0, 255);
+ setup_model2_sat = init_model2_sat;
+ } else
+ setup_model2_sat = 0x0034;
+
+ if (init_model2_yb >= 0) {
+ RESTRICT_TO_RANGE(init_model2_yb, 0, 255);
+ setup_model2_yb = init_model2_yb;
+ } else
+ setup_model2_yb = 0x00a0;
+
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_color_balance_rg2, setup_model2_rg2);
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_saturation, setup_model2_sat);
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_color_balance_yb, setup_model2_yb);
+ usb_ibmcam_model2_Packet1(ibmcam, mod2_color_balance_rg, setup_model2_rg);
+
+ /* Hardware control command */
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0030, 0x0004);
+
+ usb_ibmcam_veio(ibmcam, 0, 0x00c0, 0x010c); /* Go camera, go! */
+ usb_clear_halt(ibmcam->dev, ibmcam->video_endp);
+}
+
+/*
+ * usb_ibmcam_setup_video_stop()
+ *
+ * This code tells camera to stop streaming. The interface remains
+ * configured and bandwidth - claimed.
+ */
+static void usb_ibmcam_setup_video_stop(struct usb_ibmcam *ibmcam)
+{
+ if (ibmcam->camera_model == IBMCAM_MODEL_1) {
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x010c);
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x010c);
+ usb_ibmcam_veio(ibmcam, 0, 0x01, 0x0114);
+ usb_ibmcam_veio(ibmcam, 0, 0xc0, 0x010c);
+ usb_ibmcam_veio(ibmcam, 0, 0x00, 0x010c);
+ usb_ibmcam_send_FF_04_02(ibmcam);
+ usb_ibmcam_veio(ibmcam, 1, 0x00, 0x0100);
+ usb_ibmcam_veio(ibmcam, 0, 0x81, 0x0100); /* LED Off */
+ } else if (ibmcam->camera_model == IBMCAM_MODEL_2) {
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x010c); /* Stop the camera */
+
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0030, 0x0004);
+
+ usb_ibmcam_veio(ibmcam, 0, 0x0080, 0x0100); /* LED Off */
+ usb_ibmcam_veio(ibmcam, 0, 0x0020, 0x0111);
+ usb_ibmcam_veio(ibmcam, 0, 0x00a0, 0x0111);
+
+ usb_ibmcam_model2_Packet1(ibmcam, 0x0030, 0x0002);
+
+ usb_ibmcam_veio(ibmcam, 0, 0x0020, 0x0111);
+ usb_ibmcam_veio(ibmcam, 0, 0x0000, 0x0112);
+ }
+}
+
+/*
+ * usb_ibmcam_reinit_iso()
+ *
+ * This procedure sends couple of commands to the camera and then
+ * resets the video pipe. This sequence was observed to reinit the
+ * camera or, at least, to initiate ISO data stream.
+ *
+ * History:
+ * 1/2/00 Created.
+ */
+static void usb_ibmcam_reinit_iso(struct usb_ibmcam *ibmcam, int do_stop)
+{
+ if (ibmcam->camera_model == IBMCAM_MODEL_1) {
+ if (do_stop)
+ usb_ibmcam_setup_video_stop(ibmcam);
+ usb_ibmcam_veio(ibmcam, 0, 0x0001, 0x0114);
+ usb_ibmcam_veio(ibmcam, 0, 0x00c0, 0x010c);
+ usb_clear_halt(ibmcam->dev, ibmcam->video_endp);
+ usb_ibmcam_model1_setup_after_video_if(ibmcam);
+ } else if (ibmcam->camera_model == IBMCAM_MODEL_2) {
+ usb_ibmcam_model2_setup_after_video_if(ibmcam);
+ }
+}
+
+/*
+ * ibmcam_init_isoc()
+ *
+ * History:
+ * 1/27/00 Used ibmcam->iface, ibmcam->ifaceAltActive instead of hardcoded values.
+ * Simplified by using for loop, allowed any number of URBs.
+ */
+static int ibmcam_init_isoc(struct usb_ibmcam *ibmcam)
+{
+ struct usb_device *dev = ibmcam->dev;
+ int i, err;
+
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam))
+ return -EFAULT;
+
+ ibmcam->compress = 0;
+ ibmcam->curframe = -1;
+ ibmcam->cursbuf = 0;
+ ibmcam->scratchlen = 0;
+
+ /* Alternate interface 1 is is the biggest frame size */
+ i = usb_set_interface(dev, ibmcam->iface, ibmcam->ifaceAltActive);
+ if (i < 0) {
+ printk(KERN_ERR "usb_set_interface error\n");
+ ibmcam->last_error = i;
+ return -EBUSY;
+ }
+ usb_ibmcam_change_lighting_conditions(ibmcam);
+ usb_ibmcam_set_sharpness(ibmcam);
+ usb_ibmcam_reinit_iso(ibmcam, 0);
+
+ /* We double buffer the Iso lists */
+
+ for (i=0; i < IBMCAM_NUMSBUF; i++) {
+ int j, k;
+ urb_t *urb;
+
+ urb = usb_alloc_urb(FRAMES_PER_DESC);
+ if (urb == NULL) {
+ printk(KERN_ERR "ibmcam_init_isoc: usb_init_isoc() failed.\n");
+ return -ENOMEM;
+ }
+ ibmcam->sbuf[i].urb = urb;
+ urb->dev = dev;
+ urb->context = ibmcam;
+ urb->pipe = usb_rcvisocpipe(dev, ibmcam->video_endp);
+ urb->transfer_flags = USB_ISO_ASAP;
+ urb->transfer_buffer = ibmcam->sbuf[i].data;
+ urb->complete = ibmcam_isoc_irq;
+ urb->number_of_packets = FRAMES_PER_DESC;
+ urb->transfer_buffer_length = ibmcam->iso_packet_len * FRAMES_PER_DESC;
+ for (j=k=0; j < FRAMES_PER_DESC; j++, k += ibmcam->iso_packet_len) {
+ urb->iso_frame_desc[j].offset = k;
+ urb->iso_frame_desc[j].length = ibmcam->iso_packet_len;
+ }
+ }
+
+ /* Link URBs into a ring so that they invoke each other infinitely */
+ for (i=0; i < IBMCAM_NUMSBUF; i++) {
+ if ((i+1) < IBMCAM_NUMSBUF)
+ ibmcam->sbuf[i].urb->next = ibmcam->sbuf[i+1].urb;
+ else
+ ibmcam->sbuf[i].urb->next = ibmcam->sbuf[0].urb;
+ }
+
+ /* Submit all URBs */
+ for (i=0; i < IBMCAM_NUMSBUF; i++) {
+ err = usb_submit_urb(ibmcam->sbuf[i].urb);
+ if (err)
+ printk(KERN_ERR "ibmcam_init_isoc: usb_run_isoc(%d) ret %d\n",
+ i, err);
+ }
+
+ ibmcam->streaming = 1;
+ /* printk(KERN_DEBUG "streaming=1 ibmcam->video_endp=$%02x\n", ibmcam->video_endp); */
+ return 0;
+}
+
+/*
+ * ibmcam_stop_isoc()
+ *
+ * This procedure stops streaming and deallocates URBs. Then it
+ * activates zero-bandwidth alt. setting of the video interface.
+ *
+ * History:
+ * 1/22/00 Corrected order of actions to work after surprise removal.
+ * 1/27/00 Used ibmcam->iface, ibmcam->ifaceAltInactive instead of hardcoded values.
+ */
+static void ibmcam_stop_isoc(struct usb_ibmcam *ibmcam)
+{
+ static const char proc[] = "ibmcam_stop_isoc";
+ int i, j;
+
+ if (!ibmcam->streaming || (ibmcam->dev == NULL))
+ return;
+
+ /* Unschedule all of the iso td's */
+ for (i=0; i < IBMCAM_NUMSBUF; i++) {
+ j = usb_unlink_urb(ibmcam->sbuf[i].urb);
+ if (j < 0)
+ printk(KERN_ERR "%s: usb_unlink_urb() error %d.\n", proc, j);
+ }
+ /* printk(KERN_DEBUG "streaming=0\n"); */
+ ibmcam->streaming = 0;
+
+ /* Delete them all */
+ for (i=0; i < IBMCAM_NUMSBUF; i++)
+ usb_free_urb(ibmcam->sbuf[i].urb);
+
+ if (!ibmcam->remove_pending) {
+ usb_ibmcam_setup_video_stop(ibmcam);
+
+ /* Set packet size to 0 */
+ j = usb_set_interface(ibmcam->dev, ibmcam->iface, ibmcam->ifaceAltInactive);
+ if (j < 0) {
+ printk(KERN_ERR "%s: usb_set_interface() error %d.\n", proc, j);
+ ibmcam->last_error = j;
+ }
+ }
+}
+
+/*
+ * ibmcam_new_frame()
+ *
+ * History:
+ * 29-Mar-00 Added copying of previous frame into the current one.
+ */
+static int ibmcam_new_frame(struct usb_ibmcam *ibmcam, int framenum)
+{
+ struct ibmcam_frame *frame;
+ int n, width, height;
+
+ /* If we're not grabbing a frame right now and the other frame is */
+ /* ready to be grabbed into, then use it instead */
+ if (ibmcam->curframe != -1)
+ return 0;
+
+ n = (framenum - 1 + IBMCAM_NUMFRAMES) % IBMCAM_NUMFRAMES;
+ if (ibmcam->frame[n].grabstate == FRAME_READY)
+ framenum = n;
+
+ frame = &ibmcam->frame[framenum];
+
+ frame->grabstate = FRAME_GRABBING;
+ frame->scanstate = STATE_SCANNING;
+ frame->scanlength = 0; /* Accumulated in ibmcam_parse_data() */
+ ibmcam->curframe = framenum;
+
+ /*
+ * Normally we would want to copy previous frame into the current one
+ * before we even start filling it with data; this allows us to stop
+ * filling at any moment; top portion of the frame will be new and
+ * bottom portion will stay as it was in previous frame. If we don't
+ * do that then missing chunks of video stream will result in flickering
+ * portions of old data whatever it was before.
+ *
+ * If we choose not to copy previous frame (to, for example, save few
+ * bus cycles - the frame can be pretty large!) then we have an option
+ * to clear the frame before using. If we experience losses in this
+ * mode then missing picture will be black (no flickering).
+ *
+ * Finally, if user chooses not to clean the current frame before
+ * filling it with data then the old data will be visible if we fail
+ * to refill entire frame with new data.
+ */
+ if (!(flags & FLAGS_SEPARATE_FRAMES)) {
+ /* This copies previous frame into this one to mask losses */
+ memmove(frame->data, ibmcam->frame[1-framenum].data, MAX_FRAME_SIZE);
+ } else {
+ if (flags & FLAGS_CLEAN_FRAMES) {
+ /* This provides a "clean" frame but slows things down */
+ memset(frame->data, 0, MAX_FRAME_SIZE);
+ }
+ }
+ switch (videosize) {
+ case VIDEOSIZE_128x96:
+ frame->frmwidth = 128;
+ frame->frmheight = 96;
+ frame->order_uv = 1; /* U Y V Y ... */
+ frame->hdr_sig = 0x06; /* 00 FF 00 06 */
+ break;
+ case VIDEOSIZE_176x144:
+ frame->frmwidth = 176;
+ frame->frmheight = 144;
+ frame->order_uv = 1; /* U Y V Y ... */
+ frame->hdr_sig = 0x0E; /* 00 FF 00 0E */
+ break;
+ case VIDEOSIZE_320x240: /* For model 2 only */
+ frame->frmwidth = 320;
+ frame->frmheight = 240;
+ break;
+ case VIDEOSIZE_352x240: /* For model 2 only */
+ frame->frmwidth = 352;
+ frame->frmheight = 240;
+ break;
+ case VIDEOSIZE_352x288:
+ frame->frmwidth = 352;
+ frame->frmheight = 288;
+ frame->order_uv = 0; /* V Y U Y ... */
+ frame->hdr_sig = 0x00; /* 00 FF 00 00 */
+ break;
+ }
+ frame->order_yc = (ibmcam->camera_model == IBMCAM_MODEL_2);
+
+ width = frame->width;
+ RESTRICT_TO_RANGE(width, min_imgwidth, imgwidth);
+ width &= ~7; /* Multiple of 8 */
+
+ height = frame->height;
+ RESTRICT_TO_RANGE(height, min_imgheight, imgheight);
+ height &= ~3; /* Multiple of 4 */
+
+ return 0;
+}
+
+/*
+ * ibmcam_open()
+ *
+ * This is part of Video 4 Linux API. The driver can be opened by one
+ * client only (checks internal counter 'ibmcam->user'). The procedure
+ * then allocates buffers needed for video processing.
+ *
+ * History:
+ * 1/22/00 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).
+ * 1/27/00 Used IBMCAM_NUMSBUF as number of URB buffers.
+ * 5/24/00 Corrected to prevent race condition (MOD_xxx_USE_COUNT).
+ */
+static int ibmcam_open(struct video_device *dev, int flags)
+{
+ struct usb_ibmcam *ibmcam = (struct usb_ibmcam *)dev;
+ const int sb_size = FRAMES_PER_DESC * ibmcam->iso_packet_len;
+ int i, err = 0;
+
+ MOD_INC_USE_COUNT;
+ down(&ibmcam->lock);
+
+ if (ibmcam->user)
+ err = -EBUSY;
+ else {
+ /* Clean pointers so we know if we allocated something */
+ for (i=0; i < IBMCAM_NUMSBUF; i++)
+ ibmcam->sbuf[i].data = NULL;
+
+ /* Allocate memory for the frame buffers */
+ ibmcam->fbuf_size = IBMCAM_NUMFRAMES * MAX_FRAME_SIZE;
+ ibmcam->fbuf = rvmalloc(ibmcam->fbuf_size);
+ ibmcam->scratch = kmalloc(scratchbufsize, GFP_KERNEL);
+ ibmcam->scratchlen = 0;
+ if ((ibmcam->fbuf == NULL) || (ibmcam->scratch == NULL))
+ err = -ENOMEM;
+ else {
+ /* Allocate all buffers */
+ for (i=0; i < IBMCAM_NUMFRAMES; i++) {
+ ibmcam->frame[i].grabstate = FRAME_UNUSED;
+ ibmcam->frame[i].data = ibmcam->fbuf + i*MAX_FRAME_SIZE;
+ /*
+ * Set default sizes in case IOCTL (VIDIOCMCAPTURE)
+ * is not used (using read() instead).
+ */
+ ibmcam->frame[i].width = imgwidth;
+ ibmcam->frame[i].height = imgheight;
+ ibmcam->frame[i].bytes_read = 0;
+ }
+ for (i=0; i < IBMCAM_NUMSBUF; i++) {
+ ibmcam->sbuf[i].data = kmalloc(sb_size, GFP_KERNEL);
+ if (ibmcam->sbuf[i].data == NULL) {
+ err = -ENOMEM;
+ break;
+ }
+ }
+ }
+ if (err) {
+ /* Have to free all that memory */
+ if (ibmcam->fbuf != NULL) {
+ rvfree(ibmcam->fbuf, ibmcam->fbuf_size);
+ ibmcam->fbuf = NULL;
+ }
+ if (ibmcam->scratch != NULL) {
+ kfree(ibmcam->scratch);
+ ibmcam->scratch = NULL;
+ }
+ for (i=0; i < IBMCAM_NUMSBUF; i++) {
+ if (ibmcam->sbuf[i].data != NULL) {
+ kfree (ibmcam->sbuf[i].data);
+ ibmcam->sbuf[i].data = NULL;
+ }
+ }
+ }
+ }
+
+ /* If so far no errors then we shall start the camera */
+ if (!err) {
+ err = ibmcam_init_isoc(ibmcam);
+ if (!err) {
+ /* Send init sequence only once, it's large! */
+ if (!ibmcam->initialized) {
+ int setup_ok = 0;
+ if (ibmcam->camera_model == IBMCAM_MODEL_1)
+ setup_ok = usb_ibmcam_model1_setup(ibmcam);
+ else if (ibmcam->camera_model == IBMCAM_MODEL_2)
+ setup_ok = usb_ibmcam_model2_setup(ibmcam);
+ if (setup_ok)
+ ibmcam->initialized = 1;
+ else
+ err = -EBUSY;
+ }
+ if (!err)
+ ibmcam->user++;
+ }
+ }
+ up(&ibmcam->lock);
+ if (err)
+ MOD_DEC_USE_COUNT;
+ return err;
+}
+
+/*
+ * ibmcam_close()
+ *
+ * This is part of Video 4 Linux API. The procedure
+ * stops streaming and deallocates all buffers that were earlier
+ * allocated in ibmcam_open().
+ *
+ * History:
+ * 1/22/00 Moved scratch buffer deallocation here.
+ * 1/27/00 Used IBMCAM_NUMSBUF as number of URB buffers.
+ * 5/24/00 Moved MOD_DEC_USE_COUNT outside of code that can sleep.
+ */
+static void ibmcam_close(struct video_device *dev)
+{
+ struct usb_ibmcam *ibmcam = (struct usb_ibmcam *)dev;
+ int i;
+
+ down(&ibmcam->lock);
+
+ ibmcam_stop_isoc(ibmcam);
+
+ rvfree(ibmcam->fbuf, ibmcam->fbuf_size);
+ kfree(ibmcam->scratch);
+ for (i=0; i < IBMCAM_NUMSBUF; i++)
+ kfree(ibmcam->sbuf[i].data);
+
+ ibmcam->user--;
+
+ if (ibmcam->remove_pending) {
+ printk(KERN_INFO "ibmcam_close: Final disconnect.\n");
+ usb_ibmcam_release(ibmcam);
+ }
+ up(&ibmcam->lock);
+ MOD_DEC_USE_COUNT;
+}
+
+static int ibmcam_init_done(struct video_device *dev)
+{
+ return 0;
+}
+
+static long ibmcam_write(struct video_device *dev, const char *buf, unsigned long count, int noblock)
+{
+ return -EINVAL;
+}
+
+/*
+ * ibmcam_ioctl()
+ *
+ * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
+ *
+ * History:
+ * 1/22/00 Corrected VIDIOCSPICT to reject unsupported settings.
+ */
+static int ibmcam_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
+{
+ struct usb_ibmcam *ibmcam = (struct usb_ibmcam *)dev;
+
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam))
+ return -EFAULT;
+
+ switch (cmd) {
+ case VIDIOCGCAP:
+ {
+ if (copy_to_user(arg, &ibmcam->vcap, sizeof(ibmcam->vcap)))
+ return -EFAULT;
+ return 0;
+ }
+ case VIDIOCGCHAN:
+ {
+ if (copy_to_user(arg, &ibmcam->vchan, sizeof(ibmcam->vchan)))
+ return -EFAULT;
+ return 0;
+ }
+ case VIDIOCSCHAN:
+ {
+ int v;
+
+ if (copy_from_user(&v, arg, sizeof(v)))
+ return -EFAULT;
+ if ((v < 0) || (v >= 3)) /* 3 grades of lighting conditions */
+ return -EINVAL;
+ if (v != ibmcam->vchan.channel) {
+ ibmcam->vchan.channel = v;
+ usb_ibmcam_change_lighting_conditions(ibmcam);
+ }
+ return 0;
+ }
+ case VIDIOCGPICT:
+ {
+ if (copy_to_user(arg, &ibmcam->vpic, sizeof(ibmcam->vpic)))
+ return -EFAULT;
+ return 0;
+ }
+ case VIDIOCSPICT:
+ {
+ struct video_picture tmp;
+ /*
+ * Use temporary 'video_picture' structure to preserve our
+ * own settings (such as color depth, palette) that we
+ * aren't allowing everyone (V4L client) to change.
+ */
+ if (copy_from_user(&tmp, arg, sizeof(tmp)))
+ return -EFAULT;
+ ibmcam->vpic.brightness = tmp.brightness;
+ ibmcam->vpic.hue = tmp.hue;
+ ibmcam->vpic.colour = tmp.colour;
+ ibmcam->vpic.contrast = tmp.contrast;
+ usb_ibmcam_adjust_picture(ibmcam);
+ return 0;
+ }
+ case VIDIOCSWIN:
+ {
+ struct video_window vw;
+
+ if (copy_from_user(&vw, arg, sizeof(vw)))
+ return -EFAULT;
+ if (vw.flags)
+ return -EINVAL;
+ if (vw.clipcount)
+ return -EINVAL;
+ if (vw.height != imgheight)
+ return -EINVAL;
+ if (vw.width != imgwidth)
+ return -EINVAL;
+
+ ibmcam->compress = 0;
+
+ return 0;
+ }
+ case VIDIOCGWIN:
+ {
+ struct video_window vw;
+
+ vw.x = 0;
+ vw.y = 0;
+ vw.width = imgwidth;
+ vw.height = imgheight;
+ vw.chromakey = 0;
+ vw.flags = usb_ibmcam_calculate_fps();
+
+ if (copy_to_user(arg, &vw, sizeof(vw)))
+ return -EFAULT;
+
+ return 0;
+ }
+ case VIDIOCGMBUF:
+ {
+ struct video_mbuf vm;
+
+ memset(&vm, 0, sizeof(vm));
+ vm.size = MAX_FRAME_SIZE * 2;
+ vm.frames = 2;
+ vm.offsets[0] = 0;
+ vm.offsets[1] = MAX_FRAME_SIZE;
+
+ if (copy_to_user((void *)arg, (void *)&vm, sizeof(vm)))
+ return -EFAULT;
+
+ return 0;
+ }
+ case VIDIOCMCAPTURE:
+ {
+ struct video_mmap vm;
+
+ if (copy_from_user((void *)&vm, (void *)arg, sizeof(vm)))
+ return -EFAULT;
+
+ if (debug >= 1)
+ printk(KERN_DEBUG "frame: %d, size: %dx%d, format: %d\n",
+ vm.frame, vm.width, vm.height, vm.format);
+
+ if (vm.format != VIDEO_PALETTE_RGB24)
+ return -EINVAL;
+
+ if ((vm.frame != 0) && (vm.frame != 1))
+ return -EINVAL;
+
+ if (ibmcam->frame[vm.frame].grabstate == FRAME_GRABBING)
+ return -EBUSY;
+
+ /* Don't compress if the size changed */
+ if ((ibmcam->frame[vm.frame].width != vm.width) ||
+ (ibmcam->frame[vm.frame].height != vm.height))
+ ibmcam->compress = 0;
+
+ ibmcam->frame[vm.frame].width = vm.width;
+ ibmcam->frame[vm.frame].height = vm.height;
+
+ /* Mark it as ready */
+ ibmcam->frame[vm.frame].grabstate = FRAME_READY;
+
+ return ibmcam_new_frame(ibmcam, vm.frame);
+ }
+ case VIDIOCSYNC:
+ {
+ int frame;
+
+ if (copy_from_user((void *)&frame, arg, sizeof(int)))
+ return -EFAULT;
+
+ if (debug >= 1)
+ printk(KERN_DEBUG "ibmcam: syncing to frame %d\n", frame);
+
+ switch (ibmcam->frame[frame].grabstate) {
+ case FRAME_UNUSED:
+ return -EINVAL;
+ case FRAME_READY:
+ case FRAME_GRABBING:
+ case FRAME_ERROR:
+ {
+ int ntries;
+ redo:
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam))
+ return -EIO;
+ ntries = 0;
+ do {
+ interruptible_sleep_on(&ibmcam->frame[frame].wq);
+ if (signal_pending(current)) {
+ if (flags & FLAGS_RETRY_VIDIOCSYNC) {
+ /* Polling apps will destroy frames with that! */
+ ibmcam_new_frame(ibmcam, frame);
+ usb_ibmcam_testpattern(ibmcam, 1, 0);
+ ibmcam->curframe = -1;
+ ibmcam->frame_num++;
+
+ /* This will request another frame. */
+ if (waitqueue_active(&ibmcam->frame[frame].wq))
+ wake_up_interruptible(&ibmcam->frame[frame].wq);
+ return 0;
+ } else {
+ /* Standard answer: not ready yet! */
+ return -EINTR;
+ }
+ }
+ } while (ibmcam->frame[frame].grabstate == FRAME_GRABBING);
+
+ if (ibmcam->frame[frame].grabstate == FRAME_ERROR) {
+ int ret = ibmcam_new_frame(ibmcam, frame);
+ if (ret < 0)
+ return ret;
+ goto redo;
+ }
+ }
+ case FRAME_DONE:
+ ibmcam->frame[frame].grabstate = FRAME_UNUSED;
+ break;
+ }
+
+ ibmcam->frame[frame].grabstate = FRAME_UNUSED;
+
+ return 0;
+ }
+ case VIDIOCGFBUF:
+ {
+ struct video_buffer vb;
+
+ memset(&vb, 0, sizeof(vb));
+ vb.base = NULL; /* frame buffer not supported, not used */
+
+ if (copy_to_user((void *)arg, (void *)&vb, sizeof(vb)))
+ return -EFAULT;
+
+ return 0;
+ }
+ case VIDIOCKEY:
+ return 0;
+
+ case VIDIOCCAPTURE:
+ return -EINVAL;
+
+ case VIDIOCSFBUF:
+
+ case VIDIOCGTUNER:
+ case VIDIOCSTUNER:
+
+ case VIDIOCGFREQ:
+ case VIDIOCSFREQ:
+
+ case VIDIOCGAUDIO:
+ case VIDIOCSAUDIO:
+ return -EINVAL;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static long ibmcam_read(struct video_device *dev, char *buf, unsigned long count, int noblock)
+{
+ struct usb_ibmcam *ibmcam = (struct usb_ibmcam *)dev;
+ int frmx = -1;
+ volatile struct ibmcam_frame *frame;
+
+ if (debug >= 1)
+ printk(KERN_DEBUG "ibmcam_read: %ld bytes, noblock=%d\n", count, noblock);
+
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam) || (buf == NULL))
+ return -EFAULT;
+
+ /* See if a frame is completed, then use it. */
+ if (ibmcam->frame[0].grabstate >= FRAME_DONE) /* _DONE or _ERROR */
+ frmx = 0;
+ else if (ibmcam->frame[1].grabstate >= FRAME_DONE)/* _DONE or _ERROR */
+ frmx = 1;
+
+ if (noblock && (frmx == -1))
+ return -EAGAIN;
+
+ /* If no FRAME_DONE, look for a FRAME_GRABBING state. */
+ /* See if a frame is in process (grabbing), then use it. */
+ if (frmx == -1) {
+ if (ibmcam->frame[0].grabstate == FRAME_GRABBING)
+ frmx = 0;
+ else if (ibmcam->frame[1].grabstate == FRAME_GRABBING)
+ frmx = 1;
+ }
+
+ /* If no frame is active, start one. */
+ if (frmx == -1)
+ ibmcam_new_frame(ibmcam, frmx = 0);
+
+ frame = &ibmcam->frame[frmx];
+
+restart:
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam))
+ return -EIO;
+ while (frame->grabstate == FRAME_GRABBING) {
+ interruptible_sleep_on((void *)&frame->wq);
+ if (signal_pending(current))
+ return -EINTR;
+ }
+
+ if (frame->grabstate == FRAME_ERROR) {
+ frame->bytes_read = 0;
+ if (ibmcam_new_frame(ibmcam, frmx))
+ printk(KERN_ERR "ibmcam_read: ibmcam_new_frame error\n");
+ goto restart;
+ }
+
+ if (debug >= 1)
+ printk(KERN_DEBUG "ibmcam_read: frmx=%d, bytes_read=%ld, scanlength=%ld\n",
+ frmx, frame->bytes_read, frame->scanlength);
+
+ /* copy bytes to user space; we allow for partials reads */
+ if ((count + frame->bytes_read) > frame->scanlength)
+ count = frame->scanlength - frame->bytes_read;
+
+ if (copy_to_user(buf, frame->data + frame->bytes_read, count))
+ return -EFAULT;
+
+ frame->bytes_read += count;
+ if (debug >= 1)
+ printk(KERN_DEBUG "ibmcam_read: {copy} count used=%ld, new bytes_read=%ld\n",
+ count, frame->bytes_read);
+
+ if (frame->bytes_read >= frame->scanlength) { /* All data has been read */
+ frame->bytes_read = 0;
+
+ /* Mark it as available to be used again. */
+ ibmcam->frame[frmx].grabstate = FRAME_UNUSED;
+ if (ibmcam_new_frame(ibmcam, frmx ? 0 : 1))
+ printk(KERN_ERR "ibmcam_read: ibmcam_new_frame returned error\n");
+ }
+
+ return count;
+}
+
+static int ibmcam_mmap(struct video_device *dev, const char *adr, unsigned long size)
+{
+ struct usb_ibmcam *ibmcam = (struct usb_ibmcam *)dev;
+ unsigned long start = (unsigned long)adr;
+ unsigned long page, pos;
+
+ if (!IBMCAM_IS_OPERATIONAL(ibmcam))
+ return -EFAULT;
+
+ if (size > (((2 * MAX_FRAME_SIZE) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1)))
+ return -EINVAL;
+
+ pos = (unsigned long)ibmcam->fbuf;
+ while (size > 0) {
+ page = kvirt_to_pa(pos);
+ if (remap_page_range(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;
+}
+
+static struct video_device ibmcam_template = {
+ "CPiA USB Camera",
+ VID_TYPE_CAPTURE,
+ VID_HARDWARE_CPIA,
+ ibmcam_open,
+ ibmcam_close,
+ ibmcam_read,
+ ibmcam_write,
+ NULL,
+ ibmcam_ioctl,
+ ibmcam_mmap,
+ ibmcam_init_done,
+ NULL,
+ 0,
+ 0
+};
+
+static void usb_ibmcam_configure_video(struct usb_ibmcam *ibmcam)
+{
+ if (ibmcam == NULL)
+ return;
+
+ RESTRICT_TO_RANGE(init_brightness, 0, 255);
+ RESTRICT_TO_RANGE(init_contrast, 0, 255);
+ RESTRICT_TO_RANGE(init_color, 0, 255);
+ RESTRICT_TO_RANGE(init_hue, 0, 255);
+ RESTRICT_TO_RANGE(hue_correction, 0, 255);
+
+ memset(&ibmcam->vpic, 0, sizeof(ibmcam->vpic));
+ memset(&ibmcam->vpic_old, 0x55, sizeof(ibmcam->vpic_old));
+
+ ibmcam->vpic.colour = init_color << 8;
+ ibmcam->vpic.hue = init_hue << 8;
+ ibmcam->vpic.brightness = init_brightness << 8;
+ ibmcam->vpic.contrast = init_contrast << 8;
+ ibmcam->vpic.whiteness = 105 << 8; /* This one isn't used */
+ ibmcam->vpic.depth = 24;
+ ibmcam->vpic.palette = VIDEO_PALETTE_RGB24;
+
+ memset(&ibmcam->vcap, 0, sizeof(ibmcam->vcap));
+ strcpy(ibmcam->vcap.name, "IBM USB Camera");
+ ibmcam->vcap.type = VID_TYPE_CAPTURE;
+ ibmcam->vcap.channels = 1;
+ ibmcam->vcap.audios = 0;
+ ibmcam->vcap.maxwidth = imgwidth;
+ ibmcam->vcap.maxheight = imgheight;
+ ibmcam->vcap.minwidth = min_imgwidth;
+ ibmcam->vcap.minheight = min_imgheight;
+
+ memset(&ibmcam->vchan, 0, sizeof(ibmcam->vchan));
+ ibmcam->vchan.flags = 0;
+ ibmcam->vchan.tuners = 0;
+ ibmcam->vchan.channel = 0;
+ ibmcam->vchan.type = VIDEO_TYPE_CAMERA;
+ strcpy(ibmcam->vchan.name, "Camera");
+}
+
+/*
+ * ibmcam_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:
+ * 1/27/00 Created.
+ */
+static int ibmcam_find_struct(void)
+{
+ int i, u;
+
+ for (u = 0; u < MAX_IBMCAM; u++) {
+ struct usb_ibmcam *ibmcam = &cams[u];
+ if (!ibmcam->ibmcam_used) /* This one is free */
+ {
+ ibmcam->ibmcam_used = 1; /* In use now */
+ for (i=0; i < IBMCAM_NUMFRAMES; i++)
+ init_waitqueue_head(&ibmcam->frame[i].wq);
+ init_MUTEX(&ibmcam->lock); /* to 1 == available */
+ ibmcam->dev = NULL;
+ memcpy(&ibmcam->vdev, &ibmcam_template, sizeof(ibmcam_template));
+ return u;
+ }
+ }
+ return -1;
+}
+
+/*
+ * usb_ibmcam_probe()
+ *
+ * This procedure queries device descriptor and accepts the interface
+ * if it looks like IBM C-it camera.
+ *
+ * History:
+ * 1/22/00 Moved camera init code to ibmcam_open()
+ * 1/27/00 Changed to use static structures, added locking.
+ * 5/24/00 Corrected to prevent race condition (MOD_xxx_USE_COUNT).
+ * 7/3/00 Fixed endianness bug.
+ */
+static void *usb_ibmcam_probe(struct usb_device *dev, unsigned int ifnum)
+{
+ struct usb_ibmcam *ibmcam = NULL;
+ const struct usb_interface_descriptor *interface;
+ const struct usb_endpoint_descriptor *endpoint;
+ int devnum, model=0;
+
+ if (debug >= 1)
+ printk(KERN_DEBUG "ibmcam_probe(%p,%u.)\n", dev, ifnum);
+
+ /* We don't handle multi-config cameras */
+ if (dev->descriptor.bNumConfigurations != 1)
+ return NULL;
+
+ /* Is it an IBM camera? */
+ if ((dev->descriptor.idVendor != 0x0545) ||
+ (dev->descriptor.idProduct != 0x8080))
+ return NULL;
+
+ /* Check the version/revision */
+ switch (dev->descriptor.bcdDevice) {
+ case 0x0002:
+ if (ifnum != 2)
+ return NULL;
+ printk(KERN_INFO "IBM USB camera found (model 1, rev. 0x%04x).\n",
+ dev->descriptor.bcdDevice);
+ model = IBMCAM_MODEL_1;
+ break;
+ case 0x030A:
+ if (ifnum != 0)
+ return NULL;
+ printk(KERN_INFO "IBM USB camera found (model 2, rev. 0x%04x).\n",
+ dev->descriptor.bcdDevice);
+ model = IBMCAM_MODEL_2;
+ break;
+ default:
+ printk(KERN_ERR "IBM camera with revision 0x%04x is not supported.\n",
+ dev->descriptor.bcdDevice);
+ return NULL;
+ }
+
+ /* Validate found interface: must have one ISO endpoint */
+ interface = &dev->actconfig->interface[ifnum].altsetting[0];
+ if (interface->bNumEndpoints != 1) {
+ printk(KERN_ERR "IBM camera: interface %d. has %u. endpoints!\n",
+ ifnum, (unsigned)(interface->bNumEndpoints));
+ return NULL;
+ }
+ endpoint = &interface->endpoint[0];
+ if ((endpoint->bmAttributes & 0x03) != 0x01) {
+ printk(KERN_ERR "IBM camera: interface %d. has non-ISO endpoint!\n", ifnum);
+ return NULL;
+ }
+ if ((endpoint->bEndpointAddress & 0x80) == 0) {
+ printk(KERN_ERR "IBM camera: interface %d. has ISO OUT endpoint!\n", ifnum);
+ return NULL;
+ }
+
+ /* Validate options */
+ if (model == IBMCAM_MODEL_1) {
+ RESTRICT_TO_RANGE(lighting, 0, 2);
+ RESTRICT_TO_RANGE(videosize, VIDEOSIZE_128x96, VIDEOSIZE_352x288);
+ } else {
+ RESTRICT_TO_RANGE(lighting, 0, 15);
+ RESTRICT_TO_RANGE(videosize, VIDEOSIZE_176x144, VIDEOSIZE_352x240);
+ }
+
+ /* Code below may sleep, need to lock module while we are here */
+ MOD_INC_USE_COUNT;
+
+ devnum = ibmcam_find_struct();
+ if (devnum == -1) {
+ printk(KERN_INFO "IBM USB camera driver: Too many devices!\n");
+ ibmcam = NULL; /* Do not free, it's preallocated */
+ goto probe_done;
+ }
+ ibmcam = &cams[devnum];
+
+ down(&ibmcam->lock);
+ ibmcam->camera_model = model;
+ ibmcam->remove_pending = 0;
+ ibmcam->last_error = 0;
+ ibmcam->dev = dev;
+ ibmcam->iface = ifnum;
+ ibmcam->ifaceAltInactive = 0;
+ ibmcam->ifaceAltActive = 1;
+ ibmcam->video_endp = endpoint->bEndpointAddress;
+ ibmcam->iso_packet_len = 1014;
+ ibmcam->compress = 0;
+ ibmcam->user=0;
+
+ usb_ibmcam_configure_video(ibmcam);
+ up (&ibmcam->lock);
+
+ if (video_register_device(&ibmcam->vdev, VFL_TYPE_GRABBER) == -1) {
+ printk(KERN_ERR "video_register_device failed\n");
+ ibmcam = NULL; /* Do not free, it's preallocated */
+ }
+ if (debug > 1)
+ printk(KERN_DEBUG "video_register_device() successful\n");
+probe_done:
+ MOD_DEC_USE_COUNT;
+ return ibmcam;
+}
+
+/*
+ * usb_ibmcam_release()
+ *
+ * This code does final release of struct usb_ibmcam. This happens
+ * after the device is disconnected -and- all clients closed their files.
+ *
+ * History:
+ * 1/27/00 Created.
+ */
+static void usb_ibmcam_release(struct usb_ibmcam *ibmcam)
+{
+ video_unregister_device(&ibmcam->vdev);
+ if (debug > 0)
+ printk(KERN_DEBUG "usb_ibmcam_release: Video unregistered.\n");
+ ibmcam->ibmcam_used = 0;
+ ibmcam->initialized = 0;
+}
+
+/*
+ * usb_ibmcam_disconnect()
+ *
+ * This procedure stops all driver activity, deallocates interface-private
+ * structure (pointed by 'ptr') and after that driver should be removable
+ * with no ill consequences.
+ *
+ * This code handles surprise removal. The ibmcam->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 ibmcam->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
+ * ibmcam_close() - we decrement ibmcam->ibmcam_used and usage counter.
+ *
+ * History:
+ * 1/22/00 Added polling of MOD_IN_USE to delay removal until all users gone.
+ * 1/27/00 Reworked to allow pending disconnects; see ibmcam_close()
+ * 5/24/00 Corrected to prevent race condition (MOD_xxx_USE_COUNT).
+ */
+static void usb_ibmcam_disconnect(struct usb_device *dev, void *ptr)
+{
+ static const char proc[] = "usb_ibmcam_disconnect";
+ struct usb_ibmcam *ibmcam = (struct usb_ibmcam *) ptr;
+
+ MOD_INC_USE_COUNT;
+
+ if (debug > 0)
+ printk(KERN_DEBUG "%s(%p,%p.)\n", proc, dev, ptr);
+
+ down(&ibmcam->lock);
+ ibmcam->remove_pending = 1; /* Now all ISO data will be ignored */
+
+ /* At this time we ask to cancel outstanding URBs */
+ ibmcam_stop_isoc(ibmcam);
+
+ ibmcam->dev = NULL; /* USB device is no more */
+
+ if (ibmcam->user)
+ printk(KERN_INFO "%s: In use, disconnect pending.\n", proc);
+ else
+ usb_ibmcam_release(ibmcam);
+ up(&ibmcam->lock);
+ printk(KERN_INFO "IBM USB camera disconnected.\n");
+
+ MOD_DEC_USE_COUNT;
+}
+
+static struct usb_driver ibmcam_driver = {
+ "ibmcam",
+ usb_ibmcam_probe,
+ usb_ibmcam_disconnect,
+ { NULL, NULL }
+};
+
+/*
+ * usb_ibmcam_init()
+ *
+ * This code is run to initialize the driver.
+ *
+ * History:
+ * 1/27/00 Reworked to use statically allocated usb_ibmcam structures.
+ */
+static int __init usb_ibmcam_init(void)
+{
+ unsigned u;
+
+ /* Initialize struct */
+ for (u = 0; u < MAX_IBMCAM; u++) {
+ struct usb_ibmcam *ibmcam = &cams[u];
+ memset (ibmcam, 0, sizeof(struct usb_ibmcam));
+ }
+ return usb_register(&ibmcam_driver);
+}
+
+static void __exit usb_ibmcam_cleanup(void)
+{
+ usb_deregister(&ibmcam_driver);
+}
+
+module_init(usb_ibmcam_init);
+module_exit(usb_ibmcam_cleanup);
+
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)