diff options
Diffstat (limited to 'src/jtag/ft2232.c')
| -rw-r--r-- | src/jtag/ft2232.c | 147 |
1 files changed, 141 insertions, 6 deletions
diff --git a/src/jtag/ft2232.c b/src/jtag/ft2232.c index 862003f5..7d2fac08 100644 --- a/src/jtag/ft2232.c +++ b/src/jtag/ft2232.c @@ -83,19 +83,29 @@ typedef struct ft2232_layout_s char* name; int(*init)(void); void(*reset)(int trst, int srst); + void(*blink)(void); } ft2232_layout_t; +/* init procedures for supported layouts */ int usbjtag_init(void); int jtagkey_init(void); +int olimex_jtag_init(void); + +/* reset procedures for supported layouts */ void usbjtag_reset(int trst, int srst); void jtagkey_reset(int trst, int srst); +void olimex_jtag_reset(int trst, int srst); + +/* blink procedures for layouts that support a blinking led */ +void olimex_jtag_blink(void); ft2232_layout_t ft2232_layouts[] = { - {"usbjtag", usbjtag_init, usbjtag_reset}, - {"jtagkey", jtagkey_init, jtagkey_reset}, - {"jtagkey_prototype_v1", jtagkey_init, jtagkey_reset}, - {"signalyzer", usbjtag_init, usbjtag_reset}, + {"usbjtag", usbjtag_init, usbjtag_reset, NULL}, + {"jtagkey", jtagkey_init, jtagkey_reset, NULL}, + {"jtagkey_prototype_v1", jtagkey_init, jtagkey_reset, NULL}, + {"signalyzer", usbjtag_init, usbjtag_reset, NULL}, + {"olimex-jtag", olimex_jtag_init, olimex_jtag_reset, olimex_jtag_blink}, {NULL, NULL, NULL}, }; @@ -128,7 +138,7 @@ jtag_interface_t ft2232_interface = .execute_queue = ft2232_execute_queue, - .support_statemove = 1, + .support_pathmove = 1, .speed = ft2232_speed, .register_commands = ft2232_register_commands, @@ -674,6 +684,40 @@ void jtagkey_reset(int trst, int srst) DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction); } +void olimex_jtag_reset(int trst, int srst) +{ + if (trst == 1) + { + cur_state = TAP_TLR; + if (jtag_reset_config & RESET_TRST_OPEN_DRAIN) + high_output &= ~nTRSTnOE; + else + high_output &= ~nTRST; + } + else if (trst == 0) + { + if (jtag_reset_config & RESET_TRST_OPEN_DRAIN) + high_output |= nTRSTnOE; + else + high_output |= nTRST; + } + + if (srst == 1) + { + high_output |= nSRST; + } + else if (srst == 0) + { + high_output &= ~nSRST; + } + + /* command "set data bits high byte" */ + BUFFER_ADD = 0x82; + BUFFER_ADD = high_output; + BUFFER_ADD = high_direction; + DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction); +} + int ft2232_execute_queue() { jtag_command_t *cmd = jtag_command_queue; /* currently processed command */ @@ -687,6 +731,10 @@ int ft2232_execute_queue() ft2232_buffer_size = 0; ft2232_expect_read = 0; + + /* blink, if the current layout has that feature */ + if (layout->blink) + layout->blink(); while (cmd) { @@ -1170,7 +1218,7 @@ int jtagkey_init(void) } /* initialize high port */ - buf[0] = 0x82; /* command "set data bits low byte" */ + buf[0] = 0x82; /* command "set data bits high byte" */ buf[1] = high_output; /* value */ buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */ DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]); @@ -1184,6 +1232,93 @@ int jtagkey_init(void) return ERROR_OK; } +int olimex_jtag_init(void) +{ + u8 buf[3]; + u32 bytes_written; + + low_output = 0x08; + low_direction = 0x1b; + + /* initialize low byte for jtag */ + buf[0] = 0x80; /* command "set data bits low byte" */ + buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */ + buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */ + DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]); + + if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3)) + { + ERROR("couldn't initialize FT2232 with 'JTAGkey' layout"); + return ERROR_JTAG_INIT_FAILED; + } + + nTRST = 0x01; + nTRSTnOE = 0x4; + nSRST = 0x02; + nSRSTnOE = 0x00; /* no output enable for nSRST */ + + high_output = 0x0; + high_direction = 0x0f; + + if (jtag_reset_config & RESET_TRST_OPEN_DRAIN) + { + high_output |= nTRSTnOE; + high_output &= ~nTRST; + } + else + { + high_output &= ~nTRSTnOE; + high_output |= nTRST; + } + + if (jtag_reset_config & RESET_SRST_PUSH_PULL) + { + ERROR("can't set nSRST to push-pull on the Olimex ARM-USB-OCD"); + } + else + { + high_output &= ~nSRST; + } + + /* turn red LED on */ + high_output |= 0x08; + + /* initialize high port */ + buf[0] = 0x82; /* command "set data bits high byte" */ + buf[1] = high_output; /* value */ + buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */ + DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]); + + if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3)) + { + ERROR("couldn't initialize FT2232 with 'JTAGkey' layout"); + return ERROR_JTAG_INIT_FAILED; + } + + return ERROR_OK; +} + +void olimex_jtag_blink(void) +{ + /* Olimex ARM-USB-OCD has a LED connected to ACBUS3 + * ACBUS3 is bit 3 of the GPIOH port + */ + if (high_output & 0x08) + { + /* set port pin high */ + high_output &= 0x07; + } + else + { + /* set port pin low */ + high_output |= 0x08; + } + + BUFFER_ADD = 0x82; + BUFFER_ADD = high_output; + BUFFER_ADD = high_direction; +} + int ft2232_quit(void) { #if BUILD_FT2232_FTD2XX == 1 |