X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fjtag%2Fjtag.h;h=16eeef5440c8e11eb4d297d93b1bc0f35be4a8c7;hp=fba65852f205576e06b8aeb33d304fc071949def;hb=0cba0d4df3fe120f08945703506f8405760325c9;hpb=9a9cc91bcb61e340ba60b46dedb9017a58c8c91a diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h index fba65852f2..16eeef5440 100644 --- a/src/jtag/jtag.h +++ b/src/jtag/jtag.h @@ -2,6 +2,9 @@ * Copyright (C) 2005 by Dominic Rath * * Dominic.Rath@gmx.de * * * + * Copyright (C) 2007,2008 Øyvind Harboe * + * oyvind.harboe@zylin.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, or * @@ -30,20 +33,15 @@ #define _DEBUG_JTAG_IO_ #endif -/* Tap States - * TLR - Test-Logic-Reset, RTI - Run-Test/Idle, - * SDS - Select-DR-Scan, CD - Capture-DR, SD - Shift-DR, E1D - Exit1-DR, - * PD - Pause-DR, E2D - Exit2-DR, UD - Update-DR, - * SIS - Select-IR-Scan, CI - Capture-IR, SI - Shift-IR, E1I - Exit1-IR, - * PI - Pause-IR, E2I - Exit2-IR, UI - Update-IR +/* 16 Tap States, from page 21 of ASSET InterTech, Inc.'s svf.pdf */ enum tap_state { - TAP_TLR = 0x0, TAP_RTI = 0x8, - TAP_SDS = 0x1, TAP_CD = 0x2, TAP_SD = 0x3, TAP_E1D = 0x4, - TAP_PD = 0x5, TAP_E2D = 0x6, TAP_UD = 0x7, - TAP_SIS = 0x9, TAP_CI = 0xa, TAP_SI = 0xb, TAP_E1I = 0xc, - TAP_PI = 0xd, TAP_E2I = 0xe, TAP_UI = 0xf + TAP_RESET = 0x0, TAP_IDLE = 0x8, + TAP_DRSELECT = 0x1, TAP_DRCAPTURE = 0x2, TAP_DRSHIFT = 0x3, TAP_DREXIT1 = 0x4, + TAP_DRPAUSE = 0x5, TAP_DREXIT2 = 0x6, TAP_DRUPDATE = 0x7, + TAP_IRSELECT = 0x9, TAP_IRCAPTURE = 0xa, TAP_IRSHIFT = 0xb, TAP_IREXIT1 = 0xc, + TAP_IRPAUSE = 0xd, TAP_IREXIT2 = 0xe, TAP_IRUPDATE = 0xf }; typedef struct tap_transition_s @@ -72,19 +70,18 @@ typedef int (*in_handler_t)(u8 *in_value, void *priv, struct scan_field_s *field typedef struct scan_field_s { - int device; /* ordinal device number this instruction refers to */ + jtag_tap_t *tap; /* tap pointer this instruction refers to */ int num_bits; /* number of bits this field specifies (up to 32) */ u8 *out_value; /* value to be scanned into the device */ u8 *out_mask; /* only masked bits care */ u8 *in_value; /* pointer to a 32-bit memory location to take data scanned out */ /* in_check_value/mask, in_handler_error_handler, in_handler_priv can be used by the in handler, otherwise they contain garbage */ - u8 *in_check_value; /* used to validate scan results */ + u8 *in_check_value; /* used to validate scan results */ u8 *in_check_mask; /* check specified bits against check_value */ - in_handler_t in_handler; /* process received buffer using this handler */ + in_handler_t in_handler;/* process received buffer using this handler */ void *in_handler_priv; /* additional information for the in_handler */ } scan_field_t; - enum scan_type { /* IN: from device to host, OUT: from host to device */ @@ -160,20 +157,62 @@ typedef struct jtag_command_s extern jtag_command_t *jtag_command_queue; -typedef struct jtag_device_s +/* forward declaration */ +typedef struct jtag_tap_event_action_s jtag_tap_event_action_t; + +/* this is really: typedef jtag_tap_t */ +/* But - the typedef is done in "types.h" */ +/* due to "forward decloration reasons" */ +struct jtag_tap_s { + const char *chip; + const char *tapname; + const char *dotted_name; + int abs_chain_position; + int enabled; int ir_length; /* size of instruction register */ + u32 ir_capture_value; u8 *expected; /* Capture-IR expected value */ + u32 ir_capture_mask; u8 *expected_mask; /* Capture-IR expected mask */ u32 idcode; /* device identification code */ + u32 *expected_ids; /* Array of expected identification codes */ + u8 expected_ids_cnt;/* Number of expected identification codes */ u8 *cur_instr; /* current instruction */ int bypass; /* bypass register selected */ - struct jtag_device_s *next; -} jtag_device_t; -extern jtag_device_t *jtag_devices; -extern int jtag_num_devices; -extern int jtag_ir_scan_size; + jtag_tap_event_action_t *event_action; + + jtag_tap_t *next_tap; +}; +extern jtag_tap_t *jtag_AllTaps(void); +extern jtag_tap_t *jtag_TapByPosition(int n); +extern jtag_tap_t *jtag_TapByPosition(int n); +extern jtag_tap_t *jtag_TapByString(const char *dotted_name); +extern jtag_tap_t *jtag_TapByJimObj(Jim_Interp *interp, Jim_Obj *obj); +extern jtag_tap_t *jtag_TapByAbsPosition(int abs_position); +extern int jtag_NumEnabledTaps(void); +extern int jtag_NumTotalTaps(void); + +static __inline__ jtag_tap_t * +jtag_NextEnabledTap( jtag_tap_t *p ) +{ + if( p == NULL ){ + /* start at the head of list */ + p = jtag_AllTaps(); + } else { + /* start *after* this one */ + p = p->next_tap; + } + while( p ){ + if( p->enabled ){ + break; + } else { + p = p->next_tap; + } + } + return p; +} enum reset_line_mode { @@ -184,29 +223,70 @@ enum reset_line_mode typedef struct jtag_interface_s { char* name; - + /* queued command execution */ int (*execute_queue)(void); - + /* interface initalization */ int (*speed)(int speed); int (*register_commands)(struct command_context_s *cmd_ctx); int (*init)(void); int (*quit)(void); - + /* 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. + */ + 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. */ + 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. + + 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. + + Currently the default implementation is never to detect power dropout. + */ + int (*power_dropout)(int *power_dropout); + /* 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. + */ + int (*srst_asserted)(int *srst_asserted); + } jtag_interface_t; enum jtag_event { - JTAG_SRST_ASSERTED, - JTAG_TRST_ASSERTED, - JTAG_SRST_RELEASED, - JTAG_TRST_RELEASED, + JTAG_TRST_ASSERTED +}; + +extern char * jtag_event_strings[]; + +enum jtag_tap_event +{ + JTAG_TAP_EVENT_ENABLE, + JTAG_TAP_EVENT_DISABLE }; -extern char* jtag_event_strings[]; +extern const Jim_Nvp nvp_jtag_tap_event[]; + +struct jtag_tap_event_action_s { + enum jtag_tap_event event; + Jim_Obj *body; + jtag_tap_event_action_t *next; +}; extern int jtag_trst; extern int jtag_srst; @@ -225,13 +305,14 @@ extern enum tap_state end_state; extern enum tap_state cur_state; extern int jtag_speed; +extern int jtag_speed_post_reset; enum reset_types { - RESET_NONE = 0x0, - RESET_HAS_TRST = 0x1, - RESET_HAS_SRST = 0x2, - RESET_TRST_AND_SRST = 0x3, + RESET_NONE = 0x0, + RESET_HAS_TRST = 0x1, + RESET_HAS_SRST = 0x2, + RESET_TRST_AND_SRST = 0x3, RESET_SRST_PULLS_TRST = 0x4, RESET_TRST_PULLS_SRST = 0x8, RESET_TRST_OPEN_DRAIN = 0x10, @@ -240,11 +321,30 @@ enum reset_types extern enum reset_types jtag_reset_config; -/* JTAG subsystem */ +/* initialize interface upon startup. A successful no-op + * upon subsequent invocations + */ +extern int jtag_interface_init(struct command_context_s *cmd_ctx); +/* initialize JTAG chain using only a RESET reset. If init fails, + * try reset + init. + */ extern int jtag_init(struct command_context_s *cmd_ctx); +/* reset, then initialize JTAG chain */ +extern int jtag_init_reset(struct command_context_s *cmd_ctx); extern int jtag_register_commands(struct command_context_s *cmd_ctx); -/* JTAG interface, can be implemented with a software or hardware fifo */ +/* JTAG interface, can be implemented with a software or hardware fifo + * + * TAP_DRSHIFT and TAP_IRSHIFT are illegal end states. TAP_DRSHIFT/IRSHIFT as end states + * can be emulated by using a larger scan. + * + * Code that is relatively insensitive to the path(as long + * as it is JTAG compliant) taken through state machine can use + * endstate for jtag_add_xxx_scan(). Otherwise the pause state must be + * specified as end state and a subsequent jtag_add_pathmove() must + * be issued. + * + */ extern void jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); extern int interface_jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); extern void jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); @@ -253,87 +353,113 @@ extern void jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum ta extern int interface_jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); extern void jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); extern int interface_jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); -/* execute a state transition within the JTAG standard, but the exact path - * path that is taken is undefined. Many implementations use precisely - * 7 clocks to perform a transition, but it could be more or less - * than that. - * - * The following assertions are made about certain common state moves: - * - * - A state move from Pause-[ID]R to Pause-[ID]R should always go through - * Update-[ID]R and Capture-[ID]R before returning to Pause-[ID]R, otherwise - * there's no way force a register update, if you can't go to Run-Test/Idle for - * some reason. +/* run a TAP_RESET reset. End state is TAP_RESET, regardless + * of start state. + */ +extern void jtag_add_tlr(void); +extern int interface_jtag_add_tlr(void); +/* Do not use jtag_add_pathmove() unless you need to, but do use it + * if you have to. * - * - A state move from Pause-[ID]R to Shift-[ID]R must not go through - * Update-[ID]R. + * DANGER! If the target is dependent upon a particular sequence + * of transitions for things to work correctly(e.g. as a workaround + * for an errata that contradicts the JTAG standard), then pathmove + * must be used, even if some jtag interfaces happen to use the + * desired path. Worse, the jtag interface used for testing a + * particular implementation, could happen to use the "desired" + * path when transitioning to/from end + * state. * - * - Run-Test/Idle must not be entered unless requested, because R-T/I may have - * side effects. - * - * NB! a jtag_add_statemove() to the current state is not - * a no-operation. - */ -extern void jtag_add_statemove(enum tap_state endstate); -extern int interface_jtag_add_statemove(enum tap_state endstate); -/* A list of unambigious single clock state transitions, not + * A list of unambigious single clock state transitions, not * all drivers can support this, but it is required for e.g. * XScale and Xilinx support - * - * Note! TAP_TLR must not be used in the path! - * - * Note that the first on the list must be reachable - * via a single transition from the current state. + * + * Note! TAP_RESET must not be used in the path! + * + * Note that the first on the list must be reachable + * via a single transition from the current state. + * + * All drivers are required to implement jtag_add_pathmove(). + * However, if the pathmove sequence can not be precisely + * executed, an interface_jtag_add_pathmove() or jtag_execute_queue() + * must return an error. It is legal, but not recommended, that + * a driver returns an error in all cases for a pathmove if it + * can only implement a few transitions and therefore + * a partial implementation of pathmove would have little practical + * application. */ extern void jtag_add_pathmove(int num_states, enum tap_state *path); extern int interface_jtag_add_pathmove(int num_states, enum tap_state *path); -/* go to TAP_RTI, if we're not already there and cycle - * precisely num_cycles in the TAP_RTI after which move - * to the end state, if it is != TAP_RTI +/* go to TAP_IDLE, if we're not already there and cycle + * precisely num_cycles in the TAP_IDLE after which move + * to the end state, if it is != TAP_IDLE + * + * nb! num_cycles can be 0, in which case the fn will navigate + * to endstate via TAP_IDLE */ extern void jtag_add_runtest(int num_cycles, enum tap_state endstate); extern int interface_jtag_add_runtest(int num_cycles, enum tap_state endstate); -/* If it fails and one of the error messages below are returned, nothing is - * added to the queue and jtag_execute() won't return an error code. - * - * ERROR_JTAG_RESET_WOULD_ASSERT_TRST - * ERROR_JTAG_RESET_CANT_SRST - * - * All other error codes will result in jtag_execute_queue() returning - * an error. +/* A reset of the TAP state machine can be requested. + * + * Whether tms or trst reset is used depends on the capabilities of + * the target and jtag interface(reset_config command configures this). + * + * srst can driver a reset of the TAP state machine and vice + * versa + * + * Application code may need to examine value of jtag_reset_config + * to determine the proper codepath + * + * DANGER! Even though srst drives trst, trst might not be connected to + * the interface, and it might actually be *harmful* to assert trst in this case. + * + * This is why combinations such as "reset_config srst_only srst_pulls_trst" + * are supported. + * + * only req_tlr_or_trst and srst can have a transition for a + * call as the effects of transitioning both at the "same time" + * are undefined, but when srst_pulls_trst or vice versa, + * then trst & srst *must* be asserted together. + */ +extern void jtag_add_reset(int req_tlr_or_trst, int srst); +/* this drives the actual srst and trst pins. srst will always be 0 + * if jtag_reset_config & RESET_SRST_PULLS_TRST != 0 and ditto for + * trst. + * + * the higher level jtag_add_reset will invoke jtag_add_tlr() if + * approperiate */ -extern int jtag_add_reset(int trst, int srst); extern int interface_jtag_add_reset(int trst, int srst); extern void jtag_add_end_state(enum tap_state endstate); extern int interface_jtag_add_end_state(enum tap_state endstate); extern void jtag_add_sleep(u32 us); extern int interface_jtag_add_sleep(u32 us); - - /* - * For software FIFO implementations, the queued commands can be executed + * For software FIFO implementations, the queued commands can be executed * during this call or earlier. A sw queue might decide to push out * some of the jtag_add_xxx() operations once the queue is "big enough". - * - * This fn will return an error code if any of the prior jtag_add_xxx() + * + * This fn will return an error code if any of the prior jtag_add_xxx() * calls caused a failure, e.g. check failure. Note that it does not * matter if the operation was executed *before* jtag_execute_queue(), - * jtag_execute_queue() will still return an error code. - * + * jtag_execute_queue() will still return an error code. + * * All jtag_add_xxx() calls that have in_handler!=NULL will have been - * executed when this fn returns, but if what has been queued only - * clocks data out, without reading anything back, then JTAG could - * be running *after* jtag_execute_queue() returns. The API does - * not define a way to flush a hw FIFO that runs *after* - * jtag_execute_queue() returns. - * - * jtag_add_xxx() commands can either be executed immediately or - * at some time between the jtag_add_xxx() fn call and jtag_execute_queue(). + * executed when this fn returns, but if what has been queued only + * clocks data out, without reading anything back, then JTAG could + * be running *after* jtag_execute_queue() returns. The API does + * not define a way to flush a hw FIFO that runs *after* + * jtag_execute_queue() returns. + * + * jtag_add_xxx() commands can either be executed immediately or + * at some time between the jtag_add_xxx() fn call and jtag_execute_queue(). */ extern int jtag_execute_queue(void); /* can be implemented by hw+sw */ extern int interface_jtag_execute_queue(void); +extern int jtag_power_dropout(int *dropout); +extern int jtag_srst_asserted(int *srst_asserted); /* JTAG support functions */ extern void jtag_set_check_value(scan_field_t *field, u8 *value, u8 *mask, error_handler_t *in_error_handler); @@ -341,13 +467,15 @@ extern enum scan_type jtag_scan_type(scan_command_t *cmd); extern int jtag_scan_size(scan_command_t *cmd); extern int jtag_read_buffer(u8 *buffer, scan_command_t *cmd); extern int jtag_build_buffer(scan_command_t *cmd, u8 **buffer); -extern jtag_device_t* jtag_get_device(int num); + extern void jtag_sleep(u32 us); extern int jtag_call_event_callbacks(enum jtag_event event); extern int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv); extern int jtag_verify_capture_ir; +void jtag_tap_handle_event( jtag_tap_t * tap, enum jtag_tap_event e); + /* error codes * JTAG subsystem uses codes between -100 and -199 */ @@ -356,57 +484,49 @@ extern int jtag_verify_capture_ir; #define ERROR_JTAG_NOT_IMPLEMENTED (-102) #define ERROR_JTAG_TRST_ASSERTED (-103) #define ERROR_JTAG_QUEUE_FAILED (-104) -#define ERROR_JTAG_RESET_WOULD_ASSERT_TRST (-105) -#define ERROR_JTAG_RESET_CANT_SRST (-106) #define ERROR_JTAG_DEVICE_ERROR (-107) - - /* this allows JTAG devices to implement the entire jtag_xxx() layer in hw/sw */ #ifdef HAVE_JTAG_MINIDRIVER_H /* Here a #define MINIDRIVER() and an inline version of hw fifo interface_jtag_add_dr_out can be defined */ #include "jtag_minidriver.h" -#define MINIDRIVER(a) notused ## a +#define MINIDRIVER(a) notused ## a #else #define MINIDRIVER(a) a -/* jtag_add_dr_out() is a faster version of jtag_add_dr_scan() - * - * Current or end_state can not be TAP_TLR. end_state can be -1 - * +/* jtag_add_dr_out() is a faster version of jtag_add_dr_scan() + * + * Current or end_state can not be TAP_RESET. end_state can be -1 + * * num_bits[i] is the number of bits to clock out from value[i] LSB first. - * + * * If the device is in bypass, then that is an error condition in * the caller code that is not detected by this fn, whereas jtag_add_dr_scan() * does detect it. Similarly if the device is not in bypass, data must - * be passed to it. - * + * be passed to it. + * * If anything fails, then jtag_error will be set and jtag_execute() will * return an error. There is no way to determine if there was a failure * during this function call. - * + * * Note that this jtag_add_dr_out can be defined as an inline function. */ -extern void interface_jtag_add_dr_out(int device, +extern void interface_jtag_add_dr_out(jtag_tap_t *tap, int num_fields, - int *num_bits, - u32 *value, + const int *num_bits, + const u32 *value, enum tap_state end_state); #endif - - - -static __inline__ void jtag_add_dr_out(int device, +static __inline__ void jtag_add_dr_out(jtag_tap_t *tap, int num_fields, - int *num_bits, - u32 *value, + const int *num_bits, + const u32 *value, enum tap_state end_state) { if (end_state != -1) cmd_queue_end_state=end_state; cmd_queue_cur_state=cmd_queue_end_state; - interface_jtag_add_dr_out(device, num_fields, num_bits, value, cmd_queue_end_state); + interface_jtag_add_dr_out(tap, num_fields, num_bits, value, cmd_queue_end_state); } - #endif /* JTAG_H */