#ifndef OPENOCD_JTAG_INTERFACE_H
#define OPENOCD_JTAG_INTERFACE_H
-#include "jtag.h"
+#include <jtag/jtag.h>
/* @file
* The "Cable Helper API" is what the cable drivers can use to help
#if defined(_DEBUG_JTAG_IO_)
#define tap_set_state(new_state) \
do { \
- LOG_DEBUG( "tap_set_state(%s)", tap_state_name(new_state) ); \
+ LOG_DEBUG("tap_set_state(%s)", tap_state_name(new_state)); \
tap_set_state_impl(new_state); \
} while (0)
#else
*/
tap_state_t tap_state_transition(tap_state_t current_state, bool tms);
-/**
- * Function tap_state_name
- * Returns a string suitable for display representing the JTAG tap_state
- */
-const char* tap_state_name(tap_state_t state);
-
-/// Provides user-friendly name lookup of TAP states.
-tap_state_t tap_state_by_name(const char *name);
-
/// Allow switching between old and new TMS tables. @see tap_get_tms_path
void tap_use_new_tms_table(bool use_new);
/// @returns True if new TMS table is active; false otherwise.
}
#endif // _DEBUG_JTAG_IO_
-typedef struct jtag_interface_s
-{
+/**
+ * Represents a driver for a debugging interface.
+ *
+ * @todo Rename; perhaps "debug_driver". This isn't an interface,
+ * it's a driver! Also, not all drivers support JTAG.
+ *
+ * @todo We need a per-instance structure too, and changes to pass
+ * that structure to the driver. Instances can for example be in
+ * either SWD or JTAG modes. This will help remove globals, and
+ * eventually to cope with systems which have more than one such
+ * debugging interface.
+ */
+struct jtag_interface {
+ /// The name of the JTAG interface driver.
char* name;
- /* queued command execution
+ /**
+ * Bit vector listing capabilities exposed by this driver.
+ */
+ unsigned supported;
+#define DEBUG_CAP_TMS_SEQ (1 << 0)
+
+ /** transports supported in C code (NULL terminated vector) */
+ const char **transports;
+
+ const struct swd_driver *swd;
+
+ /**
+ * Execute queued commands.
+ * @returns ERROR_OK on success, or an error code on failure.
*/
int (*execute_queue)(void);
- /* interface initalization
+ /**
+ * Set the interface speed.
+ * @param speed The new interface speed setting.
+ * @returns ERROR_OK on success, or an error code on failure.
*/
int (*speed)(int speed);
- int (*register_commands)(struct command_context_s* cmd_ctx);
+
+ /**
+ * The interface driver may register additional commands to expose
+ * additional features not covered by the standard command set.
+ */
+ const struct command_registration *commands;
+
+ /**
+ * Interface driver must initialize any resources and connect to a
+ * JTAG device.
+ *
+ * quit() is invoked if and only if init() succeeds. quit() is always
+ * invoked if init() succeeds. Same as malloc() + free(). Always
+ * invoke free() if malloc() succeeds and do not invoke free()
+ * otherwise.
+ *
+ * @returns ERROR_OK on success, or an error code on failure.
+ */
int (*init)(void);
+
+ /**
+ * Interface driver must tear down all resources and disconnect from
+ * the JTAG device.
+ *
+ * @returns ERROR_OK on success, or an error code on failure.
+ */
int (*quit)(void);
- /* returns JTAG maxium speed for KHz. 0=RTCK. The function returns
+ /**
+ * Returns JTAG maxium speed for KHz. 0 = RTCK. The function returns
* a failure if it can't support the KHz/RTCK.
*
* WARNING!!!! if RTCK is *slow* then think carefully about
* whether you actually want to support this in the driver.
* Many target scripts are written to handle the absence of RTCK
* and use a fallback kHz TCK.
+ * @returns ERROR_OK on success, or an error code on failure.
*/
int (*khz)(int khz, int* jtag_speed);
- /* returns the KHz for the provided JTAG speed. 0=RTCK. The function returns
- * a failure if it can't support the KHz/RTCK. */
+ /**
+ * Calculate the clock frequency (in KHz) for the given @a speed.
+ * @param speed The desired interface speed setting.
+ * @param khz On return, contains the speed in KHz (0 for RTCK).
+ * @returns ERROR_OK on success, or an error code if the
+ * interface cannot support the specified speed (KHz or RTCK).
+ */
int (*speed_div)(int speed, int* khz);
- /* Read and clear the power dropout flag. Note that a power dropout
- * can be transitionary, easily much less than a ms.
+ /**
+ * Read and clear the power dropout flag. Note that a power dropout
+ * can be transitionary, easily much less than a ms.
*
- * So to find out if the power is *currently* on, you must invoke
- * this method twice. Once to clear the power dropout flag and a
- * second time to read the current state.
+ * To find out if the power is *currently* on, one must invoke this
+ * method twice. Once to clear the power dropout flag and a second
+ * time to read the current state. The default implementation
+ * never reports power dropouts.
*
- * Currently the default implementation is never to detect power dropout.
+ * @returns ERROR_OK on success, or an error code on failure.
*/
int (*power_dropout)(int* power_dropout);
- /* Read and clear the srst asserted detection flag.
+ /**
+ * Read and clear the srst asserted detection flag.
*
- * NB!!!! like power_dropout this does *not* read the current
- * state. srst assertion is transitionary and *can* be much
- * less than 1ms.
+ * Like power_dropout this does *not* read the current
+ * state. SRST assertion is transitionary and may be much
+ * less than 1ms, so the interface driver must watch for these
+ * events until this routine is called.
+ *
+ * @param srst_asserted On return, indicates whether SRST has
+ * been asserted.
+ * @returns ERROR_OK on success, or an error code on failure.
*/
int (*srst_asserted)(int* srst_asserted);
-} jtag_interface_t;
+};
+
+
+extern const char *jtag_only[];
+extern const struct swd_driver *swd;
#endif // OPENOCD_JTAG_INTERFACE_H
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