Adds initial avrftdi TPI support.

Device identification is possible tested under OS X 10.6.8 with an
FT4232H and ATtiny10.

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1145 81a1dc3b-b13d-400b-aceb-764788c761c2

avrftdi_private.h

@@ -0,0 +1,63 @@
+#pragma once
+#include "ac_cfg.h"
+
+#include <stdint.h>
+
+#ifdef HAVE_LIBFTDI1
+#  include <libftdi1/ftdi.h>
+#else
+#  error "libftdi1 required for avrftdi."
+#endif
+
+#include "pgm.h"
+
+#define E(x, ftdi)                                                  \
+	do {                                                              \
+		if ((x))                                                        \
+		{                                                               \
+			fprintf(stderr, "%s:%d %s() %s: %s (%d)\n\t%s\n",             \
+					__FILE__, __LINE__, __FUNCTION__,                         \
+					#x, strerror(errno), errno, ftdi_get_error_string(ftdi)); \
+			return -1;                                                    \
+		}                                                               \
+	} while(0)
+
+#define E_VOID(x, ftdi)                                             \
+	do {                                                              \
+		if ((x))                                                        \
+		{                                                               \
+			fprintf(stderr, "%s:%d %s() %s: %s (%d)\n\t%s\n",             \
+					__FILE__, __LINE__, __FUNCTION__,                         \
+	 			 #x, strerror(errno), errno, ftdi_get_error_string(ftdi));  \
+		}                                                               \
+	} while(0)
+
+
+#define to_pdata(pgm) \
+	((avrftdi_t *)((pgm)->cookie))
+
+typedef struct avrftdi_s {
+	/* pointer to struct maintained by libftdi to identify the device */
+	struct ftdi_context* ftdic; 
+	/* bitmask of values for pins. bit 0 represents pin 0 ([A|B]DBUS0) */
+	uint16_t pin_value;
+	/* bitmask of pin direction. a '1' make a pin an output.
+	 * bit 0 corresponds to pin 0. */
+	uint16_t pin_direction;
+	/* don't know. not useful. someone put it in. */
+	uint16_t led_mask;
+	/* total number of pins supported by a programmer. varies with FTDI chips */
+	int pin_limit;
+	/* internal RX buffer of the device. needed for INOUT transfers */
+	int rx_buffer_size;
+	/* number of guard bits for TPI. should be moved to struct PROGRAMMER */
+	int guard_bits;
+	/* function pointer to the set_pin function, so that we do not have to drag
+	 * it into global scope. it's a hack, but i think it's slightly better than
+	 * the alternative.
+	 */
+	int (*set_pin)(PROGRAMMER *, int, int);
+} avrftdi_t;
+
+void avrftdi_print(int level, const char * fmt, ...);
+