diff --git a/drivers/media/video/pvrusb2/pvrusb2-debugifc.c b/drivers/media/video/pvrusb2/pvrusb2-debugifc.c
new file mode 100644
index 0000000..586900e
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-debugifc.c
@@ -0,0 +1,478 @@
+/*
+ *
+ *  $Id$
+ *
+ *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/string.h>
+#include <linux/slab.h>
+#include "pvrusb2-debugifc.h"
+#include "pvrusb2-hdw.h"
+#include "pvrusb2-debug.h"
+#include "pvrusb2-i2c-core.h"
+
+struct debugifc_mask_item {
+	const char *name;
+	unsigned long msk;
+};
+
+static struct debugifc_mask_item mask_items[] = {
+	{"ENC_FIRMWARE",(1<<PVR2_SUBSYS_B_ENC_FIRMWARE)},
+	{"ENC_CFG",(1<<PVR2_SUBSYS_B_ENC_CFG)},
+	{"DIG_RUN",(1<<PVR2_SUBSYS_B_DIGITIZER_RUN)},
+	{"USB_RUN",(1<<PVR2_SUBSYS_B_USBSTREAM_RUN)},
+	{"ENC_RUN",(1<<PVR2_SUBSYS_B_ENC_RUN)},
+};
+
+
+static unsigned int debugifc_count_whitespace(const char *buf,
+					      unsigned int count)
+{
+	unsigned int scnt;
+	char ch;
+
+	for (scnt = 0; scnt < count; scnt++) {
+		ch = buf[scnt];
+		if (ch == ' ') continue;
+		if (ch == '\t') continue;
+		if (ch == '\n') continue;
+		break;
+	}
+	return scnt;
+}
+
+
+static unsigned int debugifc_count_nonwhitespace(const char *buf,
+						 unsigned int count)
+{
+	unsigned int scnt;
+	char ch;
+
+	for (scnt = 0; scnt < count; scnt++) {
+		ch = buf[scnt];
+		if (ch == ' ') break;
+		if (ch == '\t') break;
+		if (ch == '\n') break;
+	}
+	return scnt;
+}
+
+
+static unsigned int debugifc_isolate_word(const char *buf,unsigned int count,
+					  const char **wstrPtr,
+					  unsigned int *wlenPtr)
+{
+	const char *wptr;
+	unsigned int consume_cnt = 0;
+	unsigned int wlen;
+	unsigned int scnt;
+
+	wptr = 0;
+	wlen = 0;
+	scnt = debugifc_count_whitespace(buf,count);
+	consume_cnt += scnt; count -= scnt; buf += scnt;
+	if (!count) goto done;
+
+	scnt = debugifc_count_nonwhitespace(buf,count);
+	if (!scnt) goto done;
+	wptr = buf;
+	wlen = scnt;
+	consume_cnt += scnt; count -= scnt; buf += scnt;
+
+ done:
+	*wstrPtr = wptr;
+	*wlenPtr = wlen;
+	return consume_cnt;
+}
+
+
+static int debugifc_parse_unsigned_number(const char *buf,unsigned int count,
+					  u32 *num_ptr)
+{
+	u32 result = 0;
+	u32 val;
+	int ch;
+	int radix = 10;
+	if ((count >= 2) && (buf[0] == '0') &&
+	    ((buf[1] == 'x') || (buf[1] == 'X'))) {
+		radix = 16;
+		count -= 2;
+		buf += 2;
+	} else if ((count >= 1) && (buf[0] == '0')) {
+		radix = 8;
+	}
+
+	while (count--) {
+		ch = *buf++;
+		if ((ch >= '0') && (ch <= '9')) {
+			val = ch - '0';
+		} else if ((ch >= 'a') && (ch <= 'f')) {
+			val = ch - 'a' + 10;
+		} else if ((ch >= 'A') && (ch <= 'F')) {
+			val = ch - 'A' + 10;
+		} else {
+			return -EINVAL;
+		}
+		if (val >= radix) return -EINVAL;
+		result *= radix;
+		result += val;
+	}
+	*num_ptr = result;
+	return 0;
+}
+
+
+static int debugifc_match_keyword(const char *buf,unsigned int count,
+				  const char *keyword)
+{
+	unsigned int kl;
+	if (!keyword) return 0;
+	kl = strlen(keyword);
+	if (kl != count) return 0;
+	return !memcmp(buf,keyword,kl);
+}
+
+
+static unsigned long debugifc_find_mask(const char *buf,unsigned int count)
+{
+	struct debugifc_mask_item *mip;
+	unsigned int idx;
+	for (idx = 0; idx < sizeof(mask_items)/sizeof(mask_items[0]); idx++) {
+		mip = mask_items + idx;
+		if (debugifc_match_keyword(buf,count,mip->name)) {
+			return mip->msk;
+		}
+	}
+	return 0;
+}
+
+
+static int debugifc_print_mask(char *buf,unsigned int sz,
+			       unsigned long msk,unsigned long val)
+{
+	struct debugifc_mask_item *mip;
+	unsigned int idx;
+	int bcnt = 0;
+	int ccnt;
+	for (idx = 0; idx < sizeof(mask_items)/sizeof(mask_items[0]); idx++) {
+		mip = mask_items + idx;
+		if (!(mip->msk & msk)) continue;
+		ccnt = scnprintf(buf,sz,"%s%c%s",
+				 (bcnt ? " " : ""),
+				 ((mip->msk & val) ? '+' : '-'),
+				 mip->name);
+		sz -= ccnt;
+		buf += ccnt;
+		bcnt += ccnt;
+	}
+	return bcnt;
+}
+
+static unsigned int debugifc_parse_subsys_mask(const char *buf,
+					       unsigned int count,
+					       unsigned long *mskPtr,
+					       unsigned long *valPtr)
+{
+	const char *wptr;
+	unsigned int consume_cnt = 0;
+	unsigned int scnt;
+	unsigned int wlen;
+	int mode;
+	unsigned long m1,msk,val;
+
+	msk = 0;
+	val = 0;
+
+	while (count) {
+		scnt = debugifc_isolate_word(buf,count,&wptr,&wlen);
+		if (!scnt) break;
+		consume_cnt += scnt; count -= scnt; buf += scnt;
+		if (!wptr) break;
+
+		mode = 0;
+		if (wlen) switch (wptr[0]) {
+		case '+':
+			wptr++;
+			wlen--;
+			break;
+		case '-':
+			mode = 1;
+			wptr++;
+			wlen--;
+			break;
+		}
+		if (!wlen) continue;
+		m1 = debugifc_find_mask(wptr,wlen);
+		if (!m1) break;
+		msk |= m1;
+		if (!mode) val |= m1;
+	}
+	*mskPtr = msk;
+	*valPtr = val;
+	return consume_cnt;
+}
+
+
+int pvr2_debugifc_print_info(struct pvr2_hdw *hdw,char *buf,unsigned int acnt)
+{
+	int bcnt = 0;
+	int ccnt;
+	struct pvr2_hdw_debug_info dbg;
+
+	pvr2_hdw_get_debug_info(hdw,&dbg);
+
+	ccnt = scnprintf(buf,acnt,"big lock %s; ctl lock %s",
+			 (dbg.big_lock_held ? "held" : "free"),
+			 (dbg.ctl_lock_held ? "held" : "free"));
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	if (dbg.ctl_lock_held) {
+		ccnt = scnprintf(buf,acnt,"; cmd_state=%d cmd_code=%d"
+				 " cmd_wlen=%d cmd_rlen=%d"
+				 " wpend=%d rpend=%d tmout=%d rstatus=%d"
+				 " wstatus=%d",
+				 dbg.cmd_debug_state,dbg.cmd_code,
+				 dbg.cmd_debug_write_len,
+				 dbg.cmd_debug_read_len,
+				 dbg.cmd_debug_write_pend,
+				 dbg.cmd_debug_read_pend,
+				 dbg.cmd_debug_timeout,
+				 dbg.cmd_debug_rstatus,
+				 dbg.cmd_debug_wstatus);
+		bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	}
+	ccnt = scnprintf(buf,acnt,"\n");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(
+		buf,acnt,"driver flags: %s %s %s\n",
+		(dbg.flag_init_ok ? "initialized" : "uninitialized"),
+		(dbg.flag_ok ? "ok" : "fail"),
+		(dbg.flag_disconnected ? "disconnected" : "connected"));
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"Subsystems enabled / configured: ");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = debugifc_print_mask(buf,acnt,dbg.subsys_flags,dbg.subsys_flags);
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"\n");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"Subsystems disabled / unconfigured: ");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = debugifc_print_mask(buf,acnt,~dbg.subsys_flags,dbg.subsys_flags);
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"\n");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+
+	ccnt = scnprintf(buf,acnt,"Attached I2C modules:\n");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = pvr2_i2c_report(hdw,buf,acnt);
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+
+	return bcnt;
+}
+
+
+int pvr2_debugifc_print_status(struct pvr2_hdw *hdw,
+			       char *buf,unsigned int acnt)
+{
+	int bcnt = 0;
+	int ccnt;
+	unsigned long msk;
+	int ret;
+	u32 gpio_dir,gpio_in,gpio_out;
+
+	ret = pvr2_hdw_is_hsm(hdw);
+	ccnt = scnprintf(buf,acnt,"USB link speed: %s\n",
+			 (ret < 0 ? "FAIL" : (ret ? "high" : "full")));
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+
+	gpio_dir = 0; gpio_in = 0; gpio_out = 0;
+	pvr2_hdw_gpio_get_dir(hdw,&gpio_dir);
+	pvr2_hdw_gpio_get_out(hdw,&gpio_out);
+	pvr2_hdw_gpio_get_in(hdw,&gpio_in);
+	ccnt = scnprintf(buf,acnt,"GPIO state: dir=0x%x in=0x%x out=0x%x\n",
+			 gpio_dir,gpio_in,gpio_out);
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+
+	ccnt = scnprintf(buf,acnt,"Streaming is %s\n",
+			 pvr2_hdw_get_streaming(hdw) ? "on" : "off");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+
+	msk = pvr2_hdw_subsys_get(hdw);
+	ccnt = scnprintf(buf,acnt,"Subsystems enabled / configured: ");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = debugifc_print_mask(buf,acnt,msk,msk);
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"\n");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"Subsystems disabled / unconfigured: ");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = debugifc_print_mask(buf,acnt,~msk,msk);
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"\n");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+
+	msk = pvr2_hdw_subsys_stream_get(hdw);
+	ccnt = scnprintf(buf,acnt,"Subsystems stopped on stream shutdown: ");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = debugifc_print_mask(buf,acnt,msk,msk);
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+	ccnt = scnprintf(buf,acnt,"\n");
+	bcnt += ccnt; acnt -= ccnt; buf += ccnt;
+
+	return bcnt;
+}
+
+
+int pvr2_debugifc_do1cmd(struct pvr2_hdw *hdw,const char *buf,
+			 unsigned int count)
+{
+	const char *wptr;
+	unsigned int wlen;
+	unsigned int scnt;
+
+	scnt = debugifc_isolate_word(buf,count,&wptr,&wlen);
+	if (!scnt) return 0;
+	count -= scnt; buf += scnt;
+	if (!wptr) return 0;
+
+	pvr2_trace(PVR2_TRACE_DEBUGIFC,"debugifc cmd: \"%.*s\"",wlen,wptr);
+	if (debugifc_match_keyword(wptr,wlen,"reset")) {
+		scnt = debugifc_isolate_word(buf,count,&wptr,&wlen);
+		if (!scnt) return -EINVAL;
+		count -= scnt; buf += scnt;
+		if (!wptr) return -EINVAL;
+		if (debugifc_match_keyword(wptr,wlen,"cpu")) {
+			pvr2_hdw_cpureset_assert(hdw,!0);
+			pvr2_hdw_cpureset_assert(hdw,0);
+			return 0;
+		} else if (debugifc_match_keyword(wptr,wlen,"bus")) {
+			pvr2_hdw_device_reset(hdw);
+		} else if (debugifc_match_keyword(wptr,wlen,"soft")) {
+			return pvr2_hdw_cmd_powerup(hdw);
+		} else if (debugifc_match_keyword(wptr,wlen,"deep")) {
+			return pvr2_hdw_cmd_deep_reset(hdw);
+		} else if (debugifc_match_keyword(wptr,wlen,"firmware")) {
+			return pvr2_upload_firmware2(hdw);
+		} else if (debugifc_match_keyword(wptr,wlen,"decoder")) {
+			return pvr2_hdw_cmd_decoder_reset(hdw);
+		}
+		return -EINVAL;
+	} else if (debugifc_match_keyword(wptr,wlen,"subsys_flags")) {
+		unsigned long msk = 0;
+		unsigned long val = 0;
+		if (debugifc_parse_subsys_mask(buf,count,&msk,&val) != count) {
+			pvr2_trace(PVR2_TRACE_DEBUGIFC,
+				   "debugifc parse error on subsys mask");
+			return -EINVAL;
+		}
+		pvr2_hdw_subsys_bit_chg(hdw,msk,val);
+		return 0;
+	} else if (debugifc_match_keyword(wptr,wlen,"stream_flags")) {
+		unsigned long msk = 0;
+		unsigned long val = 0;
+		if (debugifc_parse_subsys_mask(buf,count,&msk,&val) != count) {
+			pvr2_trace(PVR2_TRACE_DEBUGIFC,
+				   "debugifc parse error on stream mask");
+			return -EINVAL;
+		}
+		pvr2_hdw_subsys_stream_bit_chg(hdw,msk,val);
+		return 0;
+	} else if (debugifc_match_keyword(wptr,wlen,"cpufw")) {
+		scnt = debugifc_isolate_word(buf,count,&wptr,&wlen);
+		if (!scnt) return -EINVAL;
+		count -= scnt; buf += scnt;
+		if (!wptr) return -EINVAL;
+		if (debugifc_match_keyword(wptr,wlen,"fetch")) {
+			pvr2_hdw_cpufw_set_enabled(hdw,!0);
+			return 0;
+		} else if (debugifc_match_keyword(wptr,wlen,"done")) {
+			pvr2_hdw_cpufw_set_enabled(hdw,0);
+			return 0;
+		} else {
+			return -EINVAL;
+		}
+	} else if (debugifc_match_keyword(wptr,wlen,"gpio")) {
+		int dir_fl = 0;
+		int ret;
+		u32 msk,val;
+		scnt = debugifc_isolate_word(buf,count,&wptr,&wlen);
+		if (!scnt) return -EINVAL;
+		count -= scnt; buf += scnt;
+		if (!wptr) return -EINVAL;
+		if (debugifc_match_keyword(wptr,wlen,"dir")) {
+			dir_fl = !0;
+		} else if (!debugifc_match_keyword(wptr,wlen,"out")) {
+			return -EINVAL;
+		}
+		scnt = debugifc_isolate_word(buf,count,&wptr,&wlen);
+		if (!scnt) return -EINVAL;
+		count -= scnt; buf += scnt;
+		if (!wptr) return -EINVAL;
+		ret = debugifc_parse_unsigned_number(wptr,wlen,&msk);
+		if (ret) return ret;
+		scnt = debugifc_isolate_word(buf,count,&wptr,&wlen);
+		if (wptr) {
+			ret = debugifc_parse_unsigned_number(wptr,wlen,&val);
+			if (ret) return ret;
+		} else {
+			val = msk;
+			msk = 0xffffffff;
+		}
+		if (dir_fl) {
+			ret = pvr2_hdw_gpio_chg_dir(hdw,msk,val);
+		} else {
+			ret = pvr2_hdw_gpio_chg_out(hdw,msk,val);
+		}
+		return ret;
+	}
+	pvr2_trace(PVR2_TRACE_DEBUGIFC,
+		   "debugifc failed to recognize cmd: \"%.*s\"",wlen,wptr);
+	return -EINVAL;
+}
+
+
+int pvr2_debugifc_docmd(struct pvr2_hdw *hdw,const char *buf,
+			unsigned int count)
+{
+	unsigned int bcnt = 0;
+	int ret;
+
+	while (count) {
+		for (bcnt = 0; bcnt < count; bcnt++) {
+			if (buf[bcnt] == '\n') break;
+		}
+
+		ret = pvr2_debugifc_do1cmd(hdw,buf,bcnt);
+		if (ret < 0) return ret;
+		if (bcnt < count) bcnt++;
+		buf += bcnt;
+		count -= bcnt;
+	}
+
+	return 0;
+}
+
+
+/*
+  Stuff for Emacs to see, in order to encourage consistent editing style:
+  *** Local Variables: ***
+  *** mode: c ***
+  *** fill-column: 75 ***
+  *** tab-width: 8 ***
+  *** c-basic-offset: 8 ***
+  *** End: ***
+  */