2003-07-01 Marcel Telka <marcel@telka.sk>

* include/bus.h (new_sh7750r_bus, new_bcm1250_bus): New function declarations (patch 753300, Matan Ziv-Av). * src/bus/Makefile.am (libbus_a_SOURCES): Added bcm1250.c and sh7750r.c (patch 753300, Matan Ziv-Av). * src/bus/bcm1250.c: New file (patch 753300, Matan Ziv-Av). * src/bus/sh7750r.c: Ditto. * src/cmd/detect.c (cmd_detect_run): Added bus driver for SH7750R and BCM1250 (patch 753300, Matan Ziv-Av). git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@490 b68d4a1b-bc3d-0410-92ed-d4ac073336b7
22 years ago · e1179f5534
parent f017932912
commit e1179f5534
7 changed files with 831 additions and 1 deletions
--- a/jtag/ChangeLog
+++ b/jtag/ChangeLog
@ -1,3 +1,11 @@
+2003-07-01  Marcel Telka  <marcel@telka.sk>
+
+	* include/bus.h (new_sh7750r_bus, new_bcm1250_bus): New function declarations (patch 753300, Matan Ziv-Av).
+	* src/bus/Makefile.am (libbus_a_SOURCES): Added bcm1250.c and sh7750r.c (patch 753300, Matan Ziv-Av).
+	* src/bus/bcm1250.c: New file (patch 753300, Matan Ziv-Av).
+	* src/bus/sh7750r.c: Ditto.
+	* src/cmd/detect.c (cmd_detect_run): Added bus driver for SH7750R and BCM1250 (patch 753300, Matan Ziv-Av).
+
 2003-06-19  Marcel Telka  <marcel@telka.sk>

 	* include/jtag.h (discovery): Removed 'filename' parameter.
--- a/jtag/NEWS
+++ b/jtag/NEWS
@ -5,6 +5,7 @@ See libbrux/NEWS for more news.
 	* Fixed bug with SELECT, AUTOFD, and STROBE signals handling (bug 745824).
 	* Added new commands 'peek' and 'poke' (patch 747447, Matan Ziv-Av).
 	* Fixed bugs in SH7727 bus driver (thanks to Rainer Dörken).
+	* Added bus drivers for Hitachi SH7750R and Broadcom BCM1250 (patch 753300, Matan Ziv-Av).
 	* Added bus width detection using MD3 and MD4 signals in SH7727 bus driver
 		(thanks to Rainer Dörken).
 	* Changes in 'discovery' command:
--- a/jtag/include/bus.h
+++ b/jtag/include/bus.h
@ -35,5 +35,7 @@ bus_t *new_sa1110_bus( chain_t *chain, int pn );
 bus_t *new_pxa250_bus( chain_t *chain, int pn );
 bus_t *new_ixp425_bus( chain_t *chain, int pn );
 bus_t *new_sh7727_bus( chain_t *chain, int pn );
+bus_t *new_sh7750r_bus( chain_t *chain, int pn );
+bus_t *new_bcm1250_bus( chain_t *chain, int pn );

 #endif /* BUS_H */
--- a/jtag/src/bus/Makefile.am
+++ b/jtag/src/bus/Makefile.am
@ -26,7 +26,9 @@ include $(top_srcdir)/Makefile.rules
 noinst_LIBRARIES = libbus.a

 libbus_a_SOURCES = \
+	bcm1250.c \
 	ixp425.c \
 	pxa2x0.c \
 	sa1110.c \
-	sh7727.c
+	sh7727.c \
+	sh7750r.c
--- a/jtag/src/bus/bcm1250.c
+++ b/jtag/src/bus/bcm1250.c
@ -0,0 +1,467 @@
+//#define USE_BCM_EJTAG
+/*
+ * $Id$
+ *
+ * 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, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Written by Matan Ziv-Av.
+ *
+ */
+
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "config.h"
+#include "part.h"
+#include "bus.h"
+#include "chain.h"
+#include "bssignal.h"
+
+#ifdef USE_BCM_EJTAG
+int bcm1250_ejtag_do(bus_t *, uint64_t, uint64_t, int, int, unsigned char *, int);
+#endif
+typedef struct {
+	chain_t *chain;
+	part_t *part;
+	signal_t *io_ad[32];
+	signal_t *io_cs_l[7];
+	signal_t *io_rw;
+	signal_t *io_wr_l;
+	signal_t *io_oe_l;
+} bus_params_t;
+
+#define CHAIN   ((bus_params_t *) bus->params)->chain
+#define PART    ((bus_params_t *) bus->params)->part
+
+#define IO_AD ((bus_params_t *) bus->params)->io_ad
+#define IO_CS_L ((bus_params_t *) bus->params)->io_cs_l
+#define IO_RW ((bus_params_t *) bus->params)->io_rw
+#define IO_WR_L ((bus_params_t *) bus->params)->io_wr_l
+#define IO_OE_L ((bus_params_t *) bus->params)->io_oe_l
+
+static void
+setup_address( bus_t *bus, uint32_t a )
+{
+	int i;
+	part_t *p = PART;
+
+	for (i = 0; i < 24; i++) {
+		part_set_signal( p, IO_AD[i], 1, (a >> i) & 1 );
+	}
+}
+
+static void
+set_data_in( bus_t *bus )
+{
+	int i;
+	part_t *p = PART;
+
+	for (i = 0; i < 8; i++) {
+		part_set_signal( p, IO_AD[i+24], 0, 0 );
+	}
+}
+
+static void
+setup_data( bus_t *bus, uint32_t d )
+{
+	int i;
+	part_t *p = PART;
+
+	for (i = 0; i < 8; i++) {
+		part_set_signal( p, IO_AD[i+24], 1, (d >> i) & 1 );
+	}
+}
+
+#ifndef USE_BCM_EJTAG
+void
+bcm1250_bus_read_start( bus_t *bus, uint32_t adr )
+{
+	part_t *p = PART;
+	chain_t *chain = CHAIN;
+
+	part_set_signal( p, IO_CS_L[0], 1, 0 );
+	part_set_signal( p, IO_CS_L[1], 1, 1 );
+	part_set_signal( p, IO_CS_L[2], 1, 1 );
+	part_set_signal( p, IO_CS_L[3], 1, 1 );
+	part_set_signal( p, IO_CS_L[4], 1, 1 );
+	part_set_signal( p, IO_CS_L[5], 1, 1 );
+	part_set_signal( p, IO_CS_L[6], 1, 1 );
+	part_set_signal( p, IO_CS_L[7], 1, 1 );
+	part_set_signal( p, IO_RW, 1, 1 );
+	part_set_signal( p, IO_WR_L, 1, 1 );
+	part_set_signal( p, IO_OE_L, 1, 0 );
+
+	setup_address( bus, adr );
+	set_data_in( bus );
+
+	chain_shift_data_registers( chain, 0 );
+}
+
+uint32_t
+bcm1250_bus_read_next( bus_t *bus , uint32_t adr )
+{
+	part_t *p = PART;
+	chain_t *chain = CHAIN;
+
+	setup_address( bus, adr );
+	chain_shift_data_registers( chain, 1 );
+
+	{
+		int i;
+		uint32_t d = 0;
+
+		for (i = 0; i < 8; i++) {
+			d |= (uint32_t) (part_get_signal( p, IO_AD[i+24] ) << i);
+		}
+
+		return d;
+	}
+}
+
+uint32_t
+bcm1250_bus_read_end( bus_t *bus )
+{
+	part_t *p = PART;
+	chain_t *chain = CHAIN;
+
+	part_set_signal( p, IO_CS_L[0], 1, 1 );
+	part_set_signal( p, IO_OE_L, 1, 1 );
+	chain_shift_data_registers( chain, 1 );
+
+	{
+		int i;
+		uint32_t d = 0;
+
+		for (i = 0; i < 8; i++) {
+			d |= (uint32_t) (part_get_signal( p, IO_AD[i+24] ) << i);
+		}
+
+		return d;
+	}
+}
+
+uint32_t
+bcm1250_bus_read( bus_t *bus, uint32_t adr )
+{
+	uint32_t i;
+	bcm1250_bus_read_start( bus, adr );
+	i=bcm1250_bus_read_end( bus );
+	return i;
+}
+
+void
+bcm1250_bus_write( bus_t *bus, uint32_t adr, uint32_t data )
+{
+	part_t *p = PART;
+	chain_t *chain = CHAIN;
+
+	part_set_signal( p, IO_CS_L[0], 1, 0 );
+	part_set_signal( p, IO_CS_L[1], 1, 1 );
+	part_set_signal( p, IO_CS_L[2], 1, 1 );
+	part_set_signal( p, IO_CS_L[3], 1, 1 );
+	part_set_signal( p, IO_CS_L[4], 1, 1 );
+	part_set_signal( p, IO_CS_L[5], 1, 1 );
+	part_set_signal( p, IO_CS_L[6], 1, 1 );
+	part_set_signal( p, IO_CS_L[7], 1, 1 );
+	part_set_signal( p, IO_RW, 1, 0 );
+	part_set_signal( p, IO_WR_L, 1, 1 );
+	part_set_signal( p, IO_OE_L, 1, 1 );
+
+	setup_address( bus, adr );
+	setup_data( bus, data );
+
+	chain_shift_data_registers( chain, 0 );
+
+	part_set_signal( p, IO_WR_L, 1, 0 );
+	chain_shift_data_registers( chain, 0 );
+	
+	part_set_signal( p, IO_WR_L, 1, 1 );
+	chain_shift_data_registers( chain, 0 );
+}
+
+#else /* BCM_EJTAG */
+int addr;
+uint64_t base = 0x1fc00000;
+uint32_t bcm1250_bus_read(bus_t *bus, uint32_t adr ) {
+	unsigned char buf[32];
+	bcm1250_ejtag_do(bus, adr+base, 0, 1, 0, buf, 0);
+	return buf[adr&0x1f];
+		
+}
+
+uint32_t bcm1250_bus_read_next(bus_t *bus, uint32_t adr ) {
+	uint32_t t;
+	t=bcm1250_bus_read(bus, addr);
+	addr=adr;
+	return t;
+}
+
+uint32_t bcm1250_bus_read_end(bus_t *bus) {
+	return bcm1250_bus_read(bus, addr);
+}
+
+void bcm1250_bus_read_start(bus_t *bus, uint32_t adr ) {
+addr=adr;
+}
+
+void
+bcm1250_bus_write( bus_t *bus, uint32_t adr, uint32_t data ) {
+	unsigned char buf[32];
+	bcm1250_ejtag_do(bus, adr+base, data, 0, 0, buf, 0);
+}
+
+#endif
+	
+static unsigned int
+bcm1250_bus_width( bus_t *bus, uint32_t addr)
+{
+	return 8;
+}
+
+static void
+bcm1250_bus_prepare( bus_t *bus )
+{
+	part_set_instruction( PART, "EXTEST" );
+	chain_shift_instructions( CHAIN );
+}
+
+static void
+bcm1250_bus_free( bus_t *bus )
+{
+	free( bus->params );
+	free( bus );
+}
+
+static const bus_t bcm1250_bus = {
+	NULL,
+	bcm1250_bus_prepare,
+	bcm1250_bus_width,
+	bcm1250_bus_read_start,
+	bcm1250_bus_read_next,
+	bcm1250_bus_read_end,
+	bcm1250_bus_read,
+	bcm1250_bus_write,
+	bcm1250_bus_free
+};
+
+bus_t *
+new_bcm1250_bus( chain_t *chain, int pn )
+{
+    bus_t *bus;
+    char buff[10];
+    int i;
+    int failed = 0;
+
+    if (!chain || !chain->parts || chain->parts->len <= pn || pn < 0)
+        return NULL;
+
+    bus = malloc( sizeof (bus_t) );
+    if (!bus)
+        return NULL;
+
+    memcpy( bus, &bcm1250_bus, sizeof (bus_t) );
+
+    bus->params = calloc( 1, sizeof (bus_params_t) );
+    if (!bus->params) {
+        free( bus );
+        return NULL;
+    }
+
+    CHAIN = chain;
+    PART = chain->parts->parts[pn];
+
+    for (i = 0; i < 32; i++) {
+        sprintf( buff, "IO_AD%d", i );
+        IO_AD[i] = part_find_signal( PART, buff );
+        if (!IO_AD[i]) {
+            printf( _("signal '%s' not found\n"), buff );
+            failed = 1;
+            break;
+        }
+    }
+    for (i = 0; i < 8; i++) {
+        sprintf( buff, "IO_CS_L%d", i );
+        IO_CS_L[i] = part_find_signal( PART, buff );
+        if (!IO_CS_L[i]) {
+            printf( _("signal '%s' not found\n"), buff );
+            failed = 1;
+            break;
+        }
+    }
+    IO_RW = part_find_signal( PART, "IO_RW" );
+    if (!IO_RW) {
+        printf( _("signal '%s' not found\n"), "IO_RW" );
+        failed = 1;
+    }
+    IO_WR_L = part_find_signal( PART, "IO_WR_L" );
+    if (!IO_WR_L) {
+        printf( _("signal '%s' not found\n"), "IO_WR_L" );
+        failed = 1;
+    }
+    IO_OE_L = part_find_signal( PART, "IO_OE_L" );
+    if (!IO_OE_L) {
+        printf( _("signal '%s' not found\n"), "IO_OE_L" );
+        failed = 1;
+    }
+
+    if (failed) {
+        free( bus->params );
+        free( bus );
+        return NULL;
+    }
+
+    return bus;
+}
+
+
+#ifdef USE_BCM_EJTAG
+int bcm1250_ejtag_do(bus_t *bus, uint64_t ad, uint64_t da, int read, int type, 
+		unsigned char *buf, int verbose) {
+	
+	part_t *p = PART;
+	chain_t *chain = CHAIN;
+	char ctrl[15]="010000000000";
+	char addrr[80]="0000" "111" "000" 
+		"11111111111111111111111111111111"
+		"00000000" "00011111" "11000000" "00000000" "000";
+	int j, k, n, m;
+	uint64_t a;
+
+	if(verbose)printf("BCM1250: ejtag_do(%08Lx, %08Lx, %i, %i)\n", ad, da, read, type);
+	
+	a=ad>>5;
+	for(j=0;j<35;j++) {
+		addrr[76-j]='0'+(a&1);
+		a>>=1;
+	}
+	
+	j=(1<<type)-1;
+	for(m=10; m<42; m++) addrr[m]='0';
+	n=ad&(~j&0x1f);
+	for(m=n; m<n+(1<<type); m++) addrr[m+10]='1';	
+
+	ctrl[2]='0';
+	ctrl[3]='0';
+	part_set_instruction( p, "CONTROLL" );
+	chain_shift_instructions(chain);
+	j=strlen(ctrl);
+	k=0;
+	while(j>0){
+		j--;
+		p->active_instruction->data_register->in->data[j]=ctrl[k++]&1;
+	}
+	chain_shift_data_registers( chain, 1 );
+
+
+	if(read) {
+		addrr[7]='0';
+		addrr[8]='0';
+		addrr[9]='0';
+	} else {
+		addrr[7]='0';
+		addrr[8]='1';
+		addrr[9]='0';
+	}
+
+	part_set_instruction( p, "ADDR" );
+	chain_shift_instructions(chain);
+	j=strlen(addrr);
+	k=0;
+	while(j>0){
+		j--;
+		p->active_instruction->data_register->in->data[j]=addrr[k++]&1;
+	}
+	chain_shift_data_registers( chain, 0 );
+
+	if(!read) {
+		part_set_instruction( p, "DATA");
+		chain_shift_instructions(chain);
+		for(j=0;j<277;j++)
+			p->active_instruction->data_register->in->data[j]=j&1;
+		p->active_instruction->data_register->in->data[259]=1;
+		p->active_instruction->data_register->in->data[258]=0;
+		p->active_instruction->data_register->in->data[257]=0;
+		p->active_instruction->data_register->in->data[256]=1;
+		j=0;
+		if(type<5) {
+			k=256-(n+(1<<type))*8;
+			while(j<(8<<type)){
+				p->active_instruction->data_register->in->data[k+j]=da&1;
+				da>>=1;
+				j++;
+			}
+		} else {
+			int r;
+			for(r=0; r<32; r++) {
+				int s,t;
+				t=buf[r];
+				for(s=0;s<8;s++) {
+					p->active_instruction->data_register->in->data[248-r*8+s]=t&1;
+					t>>=1;
+				}
+			}
+		}
+		chain_shift_data_registers( chain, 0 );
+	}
+
+
+	ctrl[2]='1';
+	if(!read)ctrl[3]='1';
+	part_set_instruction( p, "CONTROLL" );
+	chain_shift_instructions(chain);
+	j=strlen(ctrl);
+	k=0;
+	while(j>0){
+		j--;
+		p->active_instruction->data_register->in->data[j]=ctrl[k++]&1;
+	}
+	chain_shift_data_registers( chain, 1 );
+	if(verbose || read) {
+		volatile int q;
+		int to;
+		
+		to=5;
+		for(q=0;q<100;q++);
+		part_set_instruction( p, "DATA");
+		chain_shift_instructions(chain);
+		chain_shift_data_registers( chain, 1 );
+		
+		while((p->active_instruction->data_register->out->data[276-17]==0) && to--) {
+			chain_shift_data_registers( chain, 1 );
+		}
+		for(j=n;j<n+(1<<type);j++) {
+			buf[j]=0;
+			for(m=0;m<8;m++) {
+				buf[j]<<=1;
+				buf[j]+=p->active_instruction->data_register->out->data[255-(j*8)-m]&1;
+			}
+			if(verbose)printf("%02x ",buf[j]);
+		}
+		if(verbose) {
+			printf("\n");
+
+			printf(" status:\n");
+			for(j=0;j<21;j++) {
+				printf("%c", '0'+p->active_instruction->data_register->out->data[276-j]);
+				if((j==5) || (j==11) || (j==12) || (j==16) || (j==17))printf(" ");
+			}
+			printf("\n");
+		}
+	}
+	return 0;
+}
+#endif
--- a/jtag/src/bus/sh7750r.c
+++ b/jtag/src/bus/sh7750r.c
@ -0,0 +1,346 @@
+/*
+ * $Id$
+ *
+ * Copyright (C) 2003 ETC s.r.o.
+ *
+ * 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, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Written by Matan Ziv-Av <matan@svgalib.org>, 2003.
+ * Modified by Marcel Telka <marcel@telka.sk>, 2003.
+ *
+ */
+
+#include <config.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "part.h"
+#include "bus.h"
+#include "chain.h"
+#include "bssignal.h"
+
+typedef struct {
+	chain_t *chain;
+	part_t *part;
+	signal_t *a[26];
+	signal_t *d[64];
+	signal_t *cs[7];
+	signal_t *we[4];
+	signal_t *rdwr;
+	signal_t *rd;
+	signal_t *rdwr2;
+	signal_t *rd2;
+} bus_params_t;
+
+#define	CHAIN	((bus_params_t *) bus->params)->chain
+#define	PART	((bus_params_t *) bus->params)->part
+#define	A	((bus_params_t *) bus->params)->a
+#define	D	((bus_params_t *) bus->params)->d
+#define	CS	((bus_params_t *) bus->params)->cs
+#define	WE	((bus_params_t *) bus->params)->we
+#define	RDWR	((bus_params_t *) bus->params)->rdwr
+#define	RD	((bus_params_t *) bus->params)->rd
+#define	RDWR2	((bus_params_t *) bus->params)->rdwr2
+#define	RD2	((bus_params_t *) bus->params)->rd2
+
+static void
+setup_address( bus_t *bus, uint32_t a )
+{
+	int i;
+	part_t *p = PART;
+
+	for (i = 0; i < 26; i++)
+		part_set_signal( p, A[i], 1, (a >> i) & 1 );
+}
+
+static void
+set_data_in( bus_t *bus )
+{
+	int i;
+	part_t *p = PART;
+
+	for (i = 0; i < 32; i++)
+		part_set_signal( p, D[i], 0, 0 );
+}
+
+static void
+setup_data( bus_t *bus, uint32_t d )
+{
+	int i;
+	part_t *p = PART;
+
+	for (i = 0; i < 32; i++)
+		part_set_signal( p, D[i], 1, (d >> i) & 1 );
+}
+
+static void
+sh7750r_bus_prepare( bus_t *bus )
+{
+	part_set_instruction( PART, "EXTEST" );
+	chain_shift_instructions( CHAIN );
+}
+
+static void
+sh7750r_bus_read_start( bus_t *bus, uint32_t adr )
+{
+	part_t *p = PART;
+	int cs[8];
+	int i;
+
+	for (i = 0; i < 8; i++)
+		cs[i] = 1;
+	cs[(adr & 0x1C000000) >> 26] = 0;
+
+	part_set_signal( p, CS[0], 1, cs[0] );
+	part_set_signal( p, CS[1], 1, cs[1] );
+	part_set_signal( p, CS[2], 1, cs[2] );
+	part_set_signal( p, CS[3], 1, cs[3] );
+	part_set_signal( p, CS[4], 1, cs[4] );
+	part_set_signal( p, CS[5], 1, cs[5] );
+	part_set_signal( p, CS[6], 1, cs[6] );
+	part_set_signal( p, RDWR, 1, 1 );
+	part_set_signal( p, RDWR2, 1, 1 );
+	part_set_signal( p, WE[0], 1, 1 );
+	part_set_signal( p, WE[1], 1, 1 );
+	part_set_signal( p, WE[2], 1, 1 );
+	part_set_signal( p, WE[3], 1, 1 );
+	part_set_signal( p, RD, 1, 0 );
+	part_set_signal( p, RD2, 1, 0 );
+
+	setup_address( bus, adr );
+	set_data_in( bus );
+	chain_shift_data_registers( CHAIN, 0 );
+}
+
+static uint32_t
+sh7750r_bus_read_next( bus_t *bus, uint32_t adr )
+{
+	part_t *p = PART;
+	int i;
+	uint32_t d = 0;
+
+	setup_address( bus, adr );
+	chain_shift_data_registers( CHAIN, 1 );
+
+	for (i = 0; i < 32; i++)
+		d |= (uint32_t) (part_get_signal( p, D[i] ) << i);
+
+	return d;
+}
+
+static uint32_t
+sh7750r_bus_read_end( bus_t *bus )
+{
+	part_t *p = PART;
+	int cs[8];
+	int i;
+	uint32_t d = 0;
+
+	for (i = 0; i < 8; i++)
+		cs[i] = 1;
+
+	part_set_signal( p, CS[0], 1, cs[0] );
+	part_set_signal( p, CS[1], 1, cs[1] );
+	part_set_signal( p, CS[2], 1, cs[2] );
+	part_set_signal( p, CS[3], 1, cs[3] );
+	part_set_signal( p, CS[4], 1, cs[4] );
+	part_set_signal( p, CS[5], 1, cs[5] );
+	part_set_signal( p, CS[6], 1, cs[6] );
+
+	part_set_signal( p, RD, 1, 1 );
+	part_set_signal( p, RD2, 1, 1 );
+	chain_shift_data_registers( CHAIN, 1 );
+
+	for (i = 0; i < 32; i++)
+		d |= (uint32_t) (part_get_signal( p, D[i] ) << i);
+
+	return d;
+}
+
+static uint32_t
+sh7750r_bus_read( bus_t *bus, uint32_t adr )
+{
+	sh7750r_bus_read_start( bus, adr );
+	return sh7750r_bus_read_end( bus );
+}
+
+static void
+sh7750r_bus_write( bus_t *bus, uint32_t adr, uint32_t data )
+{
+	chain_t *chain = CHAIN;
+	part_t *p = PART;
+	int cs[8];
+	int i;
+
+	for (i = 0; i < 8 ; i++)
+		cs[i] = 1;
+	cs[(adr & 0x1C000000) >> 26] = 0;
+
+	part_set_signal( p, CS[0], 1, cs[0] );
+	part_set_signal( p, CS[1], 1, cs[1] );
+	part_set_signal( p, CS[2], 1, cs[2] );
+	part_set_signal( p, CS[3], 1, cs[3] );
+	part_set_signal( p, CS[4], 1, cs[4] );
+	part_set_signal( p, CS[5], 1, cs[5] );
+	part_set_signal( p, CS[6], 1, cs[6] );
+
+	part_set_signal( p, RDWR, 1, 0 );
+	part_set_signal( p, RDWR2, 1, 0 );
+	part_set_signal( p, WE[0], 1, 1 );
+	part_set_signal( p, WE[1], 1, 1 );
+	part_set_signal( p, WE[2], 1, 1 );
+	part_set_signal( p, WE[3], 1, 1 );
+	part_set_signal( p, RD, 1, 1 );
+	part_set_signal( p, RD2, 1, 1 );
+
+	setup_address( bus, adr );
+	setup_data( bus, data );
+
+	chain_shift_data_registers( chain, 0 );
+
+	part_set_signal( p, WE[0], 1, 0 );
+	part_set_signal( p, WE[1], 1, 0 );
+	part_set_signal( p, WE[2], 1, 0 );
+	part_set_signal( p, WE[3], 1, 0 );
+	
+	chain_shift_data_registers( chain, 0 );
+	
+	part_set_signal( p, WE[0], 1, 1 );
+	part_set_signal( p, WE[1], 1, 1 );
+	part_set_signal( p, WE[2], 1, 1 );
+	part_set_signal( p, WE[3], 1, 1 );
+	
+	chain_shift_data_registers( chain, 0 );
+}
+
+static unsigned int
+sh7750r_bus_width( bus_t *bus, uint32_t adr )
+{
+	return 32;
+}
+
+static void
+sh7750r_bus_free( bus_t *bus )
+{
+	free( bus->params );
+	free( bus );
+}
+
+static const bus_t sh7750r_bus = {
+	NULL,
+	sh7750r_bus_prepare,
+	sh7750r_bus_width,
+	sh7750r_bus_read_start,
+	sh7750r_bus_read_next,
+	sh7750r_bus_read_end,
+	sh7750r_bus_read,
+	sh7750r_bus_write,
+	sh7750r_bus_free
+};
+
+bus_t *
+new_sh7750r_bus( chain_t *chain, int pn )
+{
+	bus_t *bus;
+	char buff[10];
+	int i;
+	int failed = 0;
+
+	if (!chain || !chain->parts || chain->parts->len <= pn || pn < 0)
+		return NULL;
+
+	bus = malloc( sizeof (bus_t) );
+	if (!bus)
+		return NULL;
+
+	memcpy( bus, &sh7750r_bus, sizeof (bus_t) );
+
+	bus->params = calloc( 1, sizeof (bus_params_t) );
+	if (!bus->params) {
+		free( bus );
+		return NULL;
+	}
+
+	CHAIN = chain;
+	PART = chain->parts->parts[pn];
+
+	for (i = 0; i < 26; i++) {
+		sprintf( buff, "A%d", i );
+		A[i] = part_find_signal( PART, buff );
+		if (!A[i]) {
+			printf( _("signal '%s' not found\n"), buff );
+			failed = 1;
+			break;
+		}
+	}
+	for (i = 0; i < 32; i++) {
+		sprintf( buff, "D%d", i );
+		D[i] = part_find_signal( PART, buff );
+		if (!D[i]) {
+			printf( _("signal '%s' not found\n"), buff );
+			failed = 1;
+			break;
+		}
+	}
+	for (i = 0; i < 7; i++) {
+		sprintf( buff, "CS%d", i );
+		CS[i] = part_find_signal( PART, buff );
+		if (!CS[i]) {
+			printf( _("signal '%s' not found\n"), buff );
+			failed = 1;
+			break;
+		}
+	}
+	for (i = 0; i < 8; i++) {
+		sprintf( buff, "WE%d", i );
+		WE[i] = part_find_signal( PART, buff );
+		if (!WE[i]) {
+			printf( _("signal '%s' not found\n"), buff );
+			failed = 1;
+			break;
+		}
+	}
+	RDWR = part_find_signal( PART, "RDWR" );
+	if (!RDWR) {
+		printf( _("signal '%s' not found\n"), "RDWR" );
+		failed = 1;
+	}
+	RD = part_find_signal( PART, "RD" );
+	if (!RD) {
+		printf( _("signal '%s' not found\n"), "RD" );
+		failed = 1;
+	}
+	RDWR2 = part_find_signal( PART, "RDWR2" );
+	if (!RDWR2) {
+		printf( _("signal '%s' not found\n"), "RDWR2" );
+		failed = 1;
+	}
+	RD2 = part_find_signal( PART, "RD2" );
+	if (!RD2) {
+		printf( _("signal '%s' not found\n"), "RD2" );
+		failed = 1;
+	}
+
+	if (failed) {
+		free( bus->params );
+		free( bus );
+		return NULL;
+	}
+
+	return bus;
+}
--- a/jtag/src/cmd/detect.c
+++ b/jtag/src/cmd/detect.c
@ -66,6 +66,10 @@ cmd_detect_run( char *params[] )
 		bus = new_ixp425_bus( chain, 0 );
 	if (strcmp( chain->parts->parts[0]->part, "SH7727" ) == 0)
 		bus = new_sh7727_bus( chain, 0 );
+	if (strcmp( chain->parts->parts[0]->part, "SH7750R" ) == 0)
+		bus = new_sh7750r_bus( chain, 0 );
+	if (strcmp( chain->parts->parts[0]->part, "BCM1250" ) == 0)
+		bus = new_bcm1250_bus( chain, 0 );

 	return 1;
 }