diff options
Diffstat (limited to 'src/jtag/zy1000/zy1000.c')
| -rw-r--r-- | src/jtag/zy1000/zy1000.c | 809 |
1 files changed, 809 insertions, 0 deletions
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c new file mode 100644 index 00000000..ad148f1d --- /dev/null +++ b/src/jtag/zy1000/zy1000.c @@ -0,0 +1,809 @@ +/*************************************************************************** + * 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. * + ***************************************************************************/ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "embeddedice.h" +#include "minidriver.h" +#include "interface.h" + +#include <cyg/hal/hal_io.h> // low level i/o +#include <cyg/hal/hal_diag.h> + + +#define ZYLIN_VERSION "1.52" +#define ZYLIN_DATE __DATE__ +#define ZYLIN_TIME __TIME__ +#define ZYLIN_OPENOCD "$Revision$" +#define ZYLIN_OPENOCD_VERSION "Zylin JTAG ZY1000 " ZYLIN_VERSION " " ZYLIN_DATE " " ZYLIN_TIME +const char *zylin_config_dir="/config/settings"; + +/* low level command set + */ +int zy1000_read(void); +static void zy1000_write(int tck, int tms, int tdi); +void zy1000_reset(int trst, int srst); + + +int zy1000_speed(int speed); +int zy1000_register_commands(struct command_context_s *cmd_ctx); +int zy1000_init(void); +int zy1000_quit(void); + +/* interface commands */ +int zy1000_handle_zy1000_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc); + +static int zy1000_khz(int khz, int *jtag_speed) +{ + if (khz==0) + { + *jtag_speed=0; + } + else + { + *jtag_speed=64000/khz; + } + return ERROR_OK; +} + +static int zy1000_speed_div(int speed, int *khz) +{ + if (speed==0) + { + *khz = 0; + } + else + { + *khz=64000/speed; + } + + return ERROR_OK; +} + +static bool readPowerDropout(void) +{ + cyg_uint32 state; + // sample and clear power dropout + HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x80); + HAL_READ_UINT32(ZY1000_JTAG_BASE+0x10, state); + bool powerDropout; + powerDropout = (state & 0x80) != 0; + return powerDropout; +} + + +static bool readSRST(void) +{ + cyg_uint32 state; + // sample and clear SRST sensing + HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x00000040); + HAL_READ_UINT32(ZY1000_JTAG_BASE+0x10, state); + bool srstAsserted; + srstAsserted = (state & 0x40) != 0; + return srstAsserted; +} + +static int zy1000_srst_asserted(int *srst_asserted) +{ + *srst_asserted=readSRST(); + return ERROR_OK; +} + +static int zy1000_power_dropout(int *dropout) +{ + *dropout=readPowerDropout(); + return ERROR_OK; +} + + +jtag_interface_t zy1000_interface = +{ + .name = "ZY1000", + .execute_queue = NULL, + .speed = zy1000_speed, + .register_commands = zy1000_register_commands, + .init = zy1000_init, + .quit = zy1000_quit, + .khz = zy1000_khz, + .speed_div = zy1000_speed_div, + .power_dropout = zy1000_power_dropout, + .srst_asserted = zy1000_srst_asserted, +}; + +static void zy1000_write(int tck, int tms, int tdi) +{ + +} + +int zy1000_read(void) +{ + return -1; +} + +extern bool readSRST(void); + +void zy1000_reset(int trst, int srst) +{ + LOG_DEBUG("zy1000 trst=%d, srst=%d", trst, srst); + if(!srst) + { + ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x00000001); + } + else + { + /* Danger!!! if clk!=0 when in + * idle in TAP_IDLE, reset halt on str912 will fail. + */ + ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x00000001); + } + + if(!trst) + { + ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x00000002); + } + else + { + /* assert reset */ + ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x00000002); + } + + if (trst||(srst&&(jtag_reset_config & RESET_SRST_PULLS_TRST))) + { + waitIdle(); + /* we're now in the RESET state until trst is deasserted */ + ZY1000_POKE(ZY1000_JTAG_BASE+0x20, TAP_RESET); + } else + { + /* We'll get RCLK failure when we assert TRST, so clear any false positives here */ + ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x400); + } + + /* wait for srst to float back up */ + if (!srst) + { + int i; + for (i=0; i<1000; i++) + { + // We don't want to sense our own reset, so we clear here. + // There is of course a timing hole where we could loose + // a "real" reset. + if (!readSRST()) + break; + + /* wait 1ms */ + alive_sleep(1); + } + + if (i==1000) + { + LOG_USER("SRST didn't deassert after %dms", i); + } else if (i>1) + { + LOG_USER("SRST took %dms to deassert", i); + } + } +} + +int zy1000_speed(int speed) +{ + if(speed == 0) + { + /*0 means RCLK*/ + speed = 0; + ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x100); + LOG_DEBUG("jtag_speed using RCLK"); + } + else + { + if(speed > 8190 || speed < 2) + { + LOG_USER("valid ZY1000 jtag_speed=[8190,2]. Divisor is 64MHz / even values between 8190-2, i.e. min 7814Hz, max 32MHz"); + return ERROR_INVALID_ARGUMENTS; + } + + LOG_USER("jtag_speed %d => JTAG clk=%f", speed, 64.0/(float)speed); + ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x100); + ZY1000_POKE(ZY1000_JTAG_BASE+0x1c, speed&~1); + } + return ERROR_OK; +} + +static bool savePower; + + +static void setPower(bool power) +{ + savePower = power; + if (power) + { + HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x14, 0x8); + } else + { + HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x8); + } +} + +int handle_power_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +{ + if (argc > 1) + { + return ERROR_INVALID_ARGUMENTS; + } + + if (argc == 1) + { + if (strcmp(args[0], "on") == 0) + { + setPower(1); + } + else if (strcmp(args[0], "off") == 0) + { + setPower(0); + } else + { + command_print(cmd_ctx, "arg is \"on\" or \"off\""); + return ERROR_INVALID_ARGUMENTS; + } + } + + command_print(cmd_ctx, "Target power %s", savePower ? "on" : "off"); + + return ERROR_OK; +} + + +/* Give TELNET a way to find out what version this is */ +static int jim_zy1000_version(Jim_Interp *interp, int argc, Jim_Obj *const *argv) +{ + if ((argc < 1) || (argc > 2)) + return JIM_ERR; + char buff[128]; + const char *version_str=NULL; + + if (argc == 1) + { + version_str=ZYLIN_OPENOCD_VERSION; + } else + { + const char *str = Jim_GetString(argv[1], NULL); + if (strcmp("openocd", str) == 0) + { + int revision; + revision = atol(ZYLIN_OPENOCD+strlen("XRevision: ")); + sprintf(buff, "%d", revision); + version_str=buff; + } + else if (strcmp("zy1000", str) == 0) + { + version_str=ZYLIN_VERSION; + } + else if (strcmp("date", str) == 0) + { + version_str=ZYLIN_DATE; + } + else + { + return JIM_ERR; + } + } + + Jim_SetResult(interp, Jim_NewStringObj(interp, version_str, -1)); + + return JIM_OK; +} + + +static int +zylinjtag_Jim_Command_powerstatus(Jim_Interp *interp, + int argc, + Jim_Obj * const *argv) +{ + if (argc != 1) + { + Jim_WrongNumArgs(interp, 1, argv, "powerstatus"); + return JIM_ERR; + } + + cyg_uint32 status; + ZY1000_PEEK(ZY1000_JTAG_BASE+0x10, status); + + Jim_SetResult(interp, Jim_NewIntObj(interp, (status&0x80)!=0)); + + return JIM_OK; +} + +int zy1000_register_commands(struct command_context_s *cmd_ctx) +{ + register_command(cmd_ctx, NULL, "power", handle_power_command, COMMAND_ANY, + "power <on/off> - turn power switch to target on/off. No arguments - print status."); + + Jim_CreateCommand(interp, "zy1000_version", jim_zy1000_version, NULL, NULL); + + + Jim_CreateCommand(interp, "powerstatus", zylinjtag_Jim_Command_powerstatus, NULL, NULL); + + return ERROR_OK; +} + + + + +int zy1000_init(void) +{ + LOG_USER("%s", ZYLIN_OPENOCD_VERSION); + + ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x30); // Turn on LED1 & LED2 + + setPower(true); // on by default + + + /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */ + zy1000_reset(0, 0); + zy1000_speed(jtag_speed); + + return ERROR_OK; +} + +int zy1000_quit(void) +{ + + return ERROR_OK; +} + + + +int interface_jtag_execute_queue(void) +{ + cyg_uint32 empty; + + waitIdle(); + ZY1000_PEEK(ZY1000_JTAG_BASE+0x10, empty); + /* clear JTAG error register */ + ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x400); + + if ((empty&0x400)!=0) + { + LOG_WARNING("RCLK timeout"); + /* the error is informative only as we don't want to break the firmware if there + * is a false positive. + */ +// return ERROR_FAIL; + } + return ERROR_OK; +} + + + + + +static cyg_uint32 getShiftValue(void) +{ + cyg_uint32 value; + waitIdle(); + ZY1000_PEEK(ZY1000_JTAG_BASE+0xc, value); + VERBOSE(LOG_INFO("getShiftValue %08x", value)); + return value; +} +#if 0 +static cyg_uint32 getShiftValueFlip(void) +{ + cyg_uint32 value; + waitIdle(); + ZY1000_PEEK(ZY1000_JTAG_BASE+0x18, value); + VERBOSE(LOG_INFO("getShiftValue %08x (flipped)", value)); + return value; +} +#endif + +#if 0 +static void shiftValueInnerFlip(const tap_state_t state, const tap_state_t endState, int repeat, cyg_uint32 value) +{ + VERBOSE(LOG_INFO("shiftValueInner %s %s %d %08x (flipped)", tap_state_name(state), tap_state_name(endState), repeat, value)); + cyg_uint32 a,b; + a=state; + b=endState; + ZY1000_POKE(ZY1000_JTAG_BASE+0xc, value); + ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (1<<15)|(repeat<<8)|(a<<4)|b); + VERBOSE(getShiftValueFlip()); +} +#endif + +extern int jtag_check_value(u8 *captured, void *priv); + +static __inline void scanFields(int num_fields, scan_field_t *fields, tap_state_t shiftState, tap_state_t end_state) +{ + int i; + int j; + int k; + + for (i = 0; i < num_fields; i++) + { + cyg_uint32 value; + + static u8 *in_buff=NULL; /* pointer to buffer for scanned data */ + static int in_buff_size=0; + u8 *inBuffer=NULL; + + + // figure out where to store the input data + int num_bits=fields[i].num_bits; + if (fields[i].in_value!=NULL) + { + inBuffer=fields[i].in_value; + } + + // here we shuffle N bits out/in + j=0; + while (j<num_bits) + { + tap_state_t pause_state; + int l; + k=num_bits-j; + pause_state=(shiftState==TAP_DRSHIFT)?TAP_DRSHIFT:TAP_IRSHIFT; + if (k>32) + { + k=32; + /* we have more to shift out */ + } else if (i == num_fields-1) + { + /* this was the last to shift out this time */ + pause_state=end_state; + } + + // we have (num_bits+7)/8 bytes of bits to toggle out. + // bits are pushed out LSB to MSB + value=0; + if (fields[i].out_value!=NULL) + { + for (l=0; l<k; l+=8) + { + value|=fields[i].out_value[(j+l)/8]<<l; + } + } + /* mask away unused bits for easier debugging */ + value&=~(((u32)0xffffffff)<<k); + + shiftValueInner(shiftState, pause_state, k, value); + + if (inBuffer!=NULL) + { + // data in, LSB to MSB + value=getShiftValue(); + // we're shifting in data to MSB, shift data to be aligned for returning the value + value >>= 32-k; + + for (l=0; l<k; l+=8) + { + inBuffer[(j+l)/8]=(value>>l)&0xff; + } + } + j+=k; + } + } +} + +int interface_jtag_set_end_state(tap_state_t state) +{ + return ERROR_OK; +} + + +int interface_jtag_add_ir_scan(int num_fields, const scan_field_t *fields, tap_state_t state) +{ + + int j; + int scan_size = 0; + jtag_tap_t *tap, *nextTap; + for(tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap=nextTap) + { + nextTap=jtag_tap_next_enabled(tap); + tap_state_t end_state; + if (nextTap==NULL) + { + end_state = state; + } else + { + end_state = TAP_IRSHIFT; + } + + int found = 0; + + scan_size = tap->ir_length; + + /* search the list */ + for (j=0; j < num_fields; j++) + { + if (tap == fields[j].tap) + { + found = 1; + + scanFields(1, fields+j, TAP_IRSHIFT, end_state); + /* update device information */ + buf_cpy(fields[j].out_value, tap->cur_instr, scan_size); + + tap->bypass = 0; + break; + } + } + + if (!found) + { + /* if a device isn't listed, set it to BYPASS */ + u8 ones[]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff}; + + scan_field_t tmp; + memset(&tmp, 0, sizeof(tmp)); + tmp.out_value = ones; + tmp.num_bits = scan_size; + scanFields(1, &tmp, TAP_IRSHIFT, end_state); + /* update device information */ + buf_cpy(tmp.out_value, tap->cur_instr, scan_size); + tap->bypass = 1; + } + } + + return ERROR_OK; +} + + + + + +int interface_jtag_add_plain_ir_scan(int num_fields, const scan_field_t *fields, tap_state_t state) +{ + scanFields(num_fields, fields, TAP_IRSHIFT, state); + + return ERROR_OK; +} + +/*extern jtag_command_t **jtag_get_last_command_p(void);*/ + +int interface_jtag_add_dr_scan(int num_fields, const scan_field_t *fields, tap_state_t state) +{ + + int j; + jtag_tap_t *tap, *nextTap; + for(tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap=nextTap) + { + nextTap=jtag_tap_next_enabled(tap); + int found=0; + tap_state_t end_state; + if (nextTap==NULL) + { + end_state = state; + } else + { + end_state = TAP_DRSHIFT; + } + + for (j=0; j < num_fields; j++) + { + if (tap == fields[j].tap) + { + found = 1; + + scanFields(1, fields+j, TAP_DRSHIFT, end_state); + } + } + if (!found) + { + scan_field_t tmp; + /* program the scan field to 1 bit length, and ignore it's value */ + tmp.num_bits = 1; + tmp.out_value = NULL; + tmp.in_value = NULL; + + scanFields(1, &tmp, TAP_DRSHIFT, end_state); + } + else + { + } + } + return ERROR_OK; +} + +int interface_jtag_add_plain_dr_scan(int num_fields, const scan_field_t *fields, tap_state_t state) +{ + scanFields(num_fields, fields, TAP_DRSHIFT, state); + return ERROR_OK; +} + + +int interface_jtag_add_tlr() +{ + setCurrentState(TAP_RESET); + return ERROR_OK; +} + + + + +extern int jtag_nsrst_delay; +extern int jtag_ntrst_delay; + +int interface_jtag_add_reset(int req_trst, int req_srst) +{ + zy1000_reset(req_trst, req_srst); + return ERROR_OK; +} + +static int zy1000_jtag_add_clocks(int num_cycles, tap_state_t state, tap_state_t clockstate) +{ + /* num_cycles can be 0 */ + setCurrentState(clockstate); + + /* execute num_cycles, 32 at the time. */ + int i; + for (i=0; i<num_cycles; i+=32) + { + int num; + num=32; + if (num_cycles-i<num) + { + num=num_cycles-i; + } + shiftValueInner(clockstate, clockstate, num, 0); + } + +#if !TEST_MANUAL() + /* finish in end_state */ + setCurrentState(state); +#else + tap_state_t t=TAP_IDLE; + /* test manual drive code on any target */ + int tms; + u8 tms_scan = tap_get_tms_path(t, state); + int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state()); + + for (i = 0; i < tms_count; i++) + { + tms = (tms_scan >> i) & 1; + waitIdle(); + ZY1000_POKE(ZY1000_JTAG_BASE+0x28, tms); + } + waitIdle(); + ZY1000_POKE(ZY1000_JTAG_BASE+0x20, state); +#endif + + + return ERROR_OK; +} + +int interface_jtag_add_runtest(int num_cycles, tap_state_t state) +{ + return zy1000_jtag_add_clocks(num_cycles, state, TAP_IDLE); +} + +int interface_jtag_add_clocks(int num_cycles) +{ + return zy1000_jtag_add_clocks(num_cycles, cmd_queue_cur_state, cmd_queue_cur_state); +} + +int interface_jtag_add_sleep(u32 us) +{ + jtag_sleep(us); + return ERROR_OK; +} + +int interface_jtag_add_pathmove(int num_states, const tap_state_t *path) +{ + int state_count; + int tms = 0; + + /*wait for the fifo to be empty*/ + waitIdle(); + + state_count = 0; + + tap_state_t cur_state=cmd_queue_cur_state; + + while (num_states) + { + if (tap_state_transition(cur_state, false) == path[state_count]) + { + tms = 0; + } + else if (tap_state_transition(cur_state, true) == path[state_count]) + { + tms = 1; + } + else + { + LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(cur_state), tap_state_name(path[state_count])); + exit(-1); + } + + waitIdle(); + ZY1000_POKE(ZY1000_JTAG_BASE+0x28, tms); + + cur_state = path[state_count]; + state_count++; + num_states--; + } + + waitIdle(); + ZY1000_POKE(ZY1000_JTAG_BASE+0x20, cur_state); + return ERROR_OK; +} + + + +void embeddedice_write_dcc(jtag_tap_t *tap, int reg_addr, u8 *buffer, int little, int count) +{ +// static int const reg_addr=0x5; + tap_state_t end_state=jtag_get_end_state(); + if (jtag_tap_next_enabled(jtag_tap_next_enabled(NULL))==NULL) + { + /* better performance via code duplication */ + if (little) + { + int i; + for (i = 0; i < count; i++) + { + shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 1)); + shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr|(1<<5)); + buffer+=4; + } + } else + { + int i; + for (i = 0; i < count; i++) + { + shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 0)); + shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr|(1<<5)); + buffer+=4; + } + } + } + else + { + int i; + for (i = 0; i < count; i++) + { + embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little)); + buffer += 4; + } + } +} + +int loadFile(const char *fileName, void **data, int *len); + +/* boolean parameter stored on config */ +int boolParam(char *var) +{ + bool result = false; + char *name = alloc_printf("%s/%s", zylin_config_dir, var); + if (name == NULL) + return result; + + void *data; + int len; + if (loadFile(name, &data, &len) == ERROR_OK) + { + if (len > 1) + len = 1; + result = strncmp((char *) data, "1", len) == 0; + free(data); + } + free(name); + return result; +} + + |