diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/jtag/Makefile.am | 3 | ||||
| -rw-r--r-- | src/jtag/zy1000/jtag_minidriver.h | 210 | ||||
| -rw-r--r-- | src/jtag/zy1000/zy1000.c (renamed from src/jtag/zy1000.c) | 0 |
3 files changed, 212 insertions, 1 deletions
diff --git a/src/jtag/Makefile.am b/src/jtag/Makefile.am index 567a8fc2..b798a28d 100644 --- a/src/jtag/Makefile.am +++ b/src/jtag/Makefile.am @@ -46,7 +46,8 @@ EP93XXFILES = endif if ECOSBOARD -ECOSBOARDFILES = zy1000.c +ECOSBOARDFILES = zy1000/zy1000.c +AM_CPPFLAGS += -I$(srcdir)/zy1000 else ECOSBOARDFILES = endif diff --git a/src/jtag/zy1000/jtag_minidriver.h b/src/jtag/zy1000/jtag_minidriver.h new file mode 100644 index 00000000..5fafd9ec --- /dev/null +++ b/src/jtag/zy1000/jtag_minidriver.h @@ -0,0 +1,210 @@ +/***************************************************************************
+ * Copyright (C) 2007-2008 by Øyvind Harboe *
+ * *
+ * 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. *
+ ***************************************************************************/
+
+#include <cyg/hal/hal_io.h> // low level i/o
+
+//#define VERBOSE(a) a
+#define VERBOSE(a)
+
+/* used to test manual mode */
+#define TEST_MANUAL() 0
+
+#if 0
+int diag_printf( const char *fmt, ... );
+#define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b); diag_printf("poke 0x%08x,0x%08x\n", a, b)
+#define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b); diag_printf("peek 0x%08x=0x%08x\n", a, b)
+#else
+#define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b)
+#define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b)
+#endif
+
+// FIFO empty?
+static __inline__ void waitIdle(void)
+{
+ cyg_uint32 empty;
+ do
+ {
+ ZY1000_PEEK(ZY1000_JTAG_BASE+0x10, empty);
+ } while ((empty & 0x100)==0);
+}
+
+static __inline__ void waitQueue(void)
+{
+// waitIdle();
+}
+
+static void sampleShiftRegister(void)
+{
+#if 0
+ cyg_uint32 dummy;
+ waitIdle();
+ ZY1000_PEEK(ZY1000_JTAG_BASE+0xc, dummy);
+#endif
+}
+
+/* -O3 will inline this for us */
+static void setCurrentState(enum tap_state state)
+{
+ cyg_uint32 a;
+ a=state;
+ int repeat=0;
+ if (state==TAP_RESET)
+ {
+ // The FPGA nor we know the current state of the CPU TAP
+ // controller. This will move it to TAP for sure.
+ //
+ // 5 should be enough here, 7 is what OpenOCD uses
+ repeat=7;
+ }
+ waitQueue();
+ sampleShiftRegister();
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (repeat<<8)|(a<<4)|a);
+
+}
+
+/*
+ * Enter state and cause repeat transitions *out* of that state. So if the endState!=state, then
+ * the transition from state to endState counts as a transition out of state.
+ */
+static __inline__ void shiftValueInner(const enum tap_state state, const enum tap_state endState, int repeat, cyg_uint32 value)
+{
+ cyg_uint32 a,b;
+ a=state;
+ b=endState;
+ waitQueue();
+ sampleShiftRegister();
+ ZY1000_POKE(ZY1000_JTAG_BASE+0xc, value);
+#if 1
+#if TEST_MANUAL()
+ if ((state==TAP_DRSHIFT)&&(endState!=TAP_DRSHIFT))
+ {
+ int i;
+ setCurrentState(state);
+ for (i=0; i<repeat; i++)
+ {
+ int tms;
+ tms=0;
+ if ((i==repeat-1)&&(state!=endState))
+ {
+ tms=1;
+ }
+ /* shift out value */
+ waitIdle();
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x28, (((value>>i)&1)<<1)|tms);
+ }
+ waitIdle();
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x28, 0);
+ waitIdle();
+ //ZY1000_POKE(ZY1000_JTAG_BASE+0x20, TAP_DRSHIFT); // set this state and things break => expected
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x20, TAP_DRPAUSE); // set this and things will work => expected. Not setting this is not sufficient to make things break.
+ setCurrentState(endState);
+ } else
+ {
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (repeat<<8)|(a<<4)|b);
+ }
+#else
+ /* fast version */
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (repeat<<8)|(a<<4)|b);
+#endif
+#else
+ /* maximum debug version */
+ if ((repeat>0)&&((state==TAP_DRSHIFT)||(state==TAP_SI)))
+ {
+ int i;
+ /* sample shift register for every bit. */
+ for (i=0; i<repeat-1; i++)
+ {
+ sampleShiftRegister();
+ ZY1000_POKE(ZY1000_JTAG_BASE+0xc, value>>i);
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (1<<8)|(a<<4)|a);
+ }
+ sampleShiftRegister();
+ ZY1000_POKE(ZY1000_JTAG_BASE+0xc, value>>(repeat-1));
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (1<<8)|(a<<4)|b);
+ } else
+ {
+ sampleShiftRegister();
+ ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (repeat<<8)|(a<<4)|b);
+ }
+ sampleShiftRegister();
+#endif
+}
+
+
+
+static __inline__ void interface_jtag_add_dr_out_core(jtag_tap_t *target_tap,
+ int num_fields,
+ const int *num_bits,
+ const u32 *value,
+ enum tap_state end_state)
+{
+ enum tap_state pause_state = TAP_DRSHIFT;
+
+ jtag_tap_t *tap, *nextTap;
+ for(tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap=nextTap)
+ {
+ nextTap=jtag_tap_next_enabled(tap);
+ if (nextTap==NULL)
+ {
+ pause_state = end_state;
+ }
+ if (tap == target_tap)
+ {
+ int j;
+ for (j=0; j<(num_fields-1); j++)
+ {
+ shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[j], value[j]);
+ }
+ shiftValueInner(TAP_DRSHIFT, pause_state, num_bits[j], value[j]);
+ } else
+ {
+ /* program the scan field to 1 bit length, and ignore it's value */
+ shiftValueInner(TAP_DRSHIFT, pause_state, 1, 0);
+ }
+ }
+}
+
+static __inline__ void interface_jtag_add_dr_out(jtag_tap_t *target_tap,
+ int num_fields,
+ const int *num_bits,
+ const u32 *value,
+ enum tap_state end_state)
+{
+
+ int singletap=(jtag_tap_next_enabled(jtag_tap_next_enabled(NULL))==NULL);
+ if ((singletap)&&(num_fields==3))
+ {
+ /* used by embeddedice_write_reg_inner() */
+ shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
+ shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[1], value[1]);
+ shiftValueInner(TAP_DRSHIFT, end_state, num_bits[2], value[2]);
+ } else if ((singletap)&&(num_fields==2))
+ {
+ /* used by arm7 code */
+ shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
+ shiftValueInner(TAP_DRSHIFT, end_state, num_bits[1], value[1]);
+ } else
+ {
+ interface_jtag_add_dr_out_core(target_tap, num_fields, num_bits, value, end_state);
+ }
+}
+
+#define interface_jtag_add_callback(callback, in) callback(in)
+
+#define interface_jtag_add_callback4(callback, in, data1, data2, data3) jtag_set_error(callback(in, data1, data2, data3))
diff --git a/src/jtag/zy1000.c b/src/jtag/zy1000/zy1000.c index ad148f1d..ad148f1d 100644 --- a/src/jtag/zy1000.c +++ b/src/jtag/zy1000/zy1000.c |