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@@ -114,6 +114,7 @@ static int comstick_init(void); |
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static int stm32stick_init(void); |
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static int axm0432_jtag_init(void); |
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static int sheevaplug_init(void); |
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static int icebear_jtag_init(void); |
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/* reset procedures for supported layouts */ |
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static void usbjtag_reset(int trst, int srst); |
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@@ -125,6 +126,7 @@ static void comstick_reset(int trst, int srst); |
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static void stm32stick_reset(int trst, int srst); |
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static void axm0432_jtag_reset(int trst, int srst); |
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static void sheevaplug_reset(int trst, int srst); |
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static void icebear_jtag_reset(int trst, int srst); |
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/* blink procedures for layouts that support a blinking led */ |
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static void olimex_jtag_blink(void); |
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@@ -146,6 +148,7 @@ ft2232_layout_t ft2232_layouts[] = |
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{ "stm32stick", stm32stick_init, stm32stick_reset, NULL }, |
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{ "axm0432_jtag", axm0432_jtag_init, axm0432_jtag_reset, NULL }, |
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{"sheevaplug", sheevaplug_init, sheevaplug_reset, NULL }, |
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{ "icebear", icebear_jtag_init, icebear_jtag_reset, NULL }, |
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{ NULL, NULL, NULL, NULL }, |
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}; |
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@@ -2661,3 +2664,105 @@ static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd) |
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return retval; |
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} |
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/* --------------------------------------------------------------------- |
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* Support for IceBear JTAG adapter from Section5: |
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* http://section5.ch/icebear |
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* |
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* Author: Sten, debian@sansys-electronic.com |
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*/ |
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/* Icebear pin layout |
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* |
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* ADBUS5 (nEMU) nSRST | 2 1| GND (10k->VCC) |
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* GND GND | 4 3| n.c. |
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* ADBUS3 TMS | 6 5| ADBUS6 VCC |
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* ADBUS0 TCK | 8 7| ADBUS7 (GND) |
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* ADBUS4 nTRST |10 9| ACBUS0 (GND) |
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* ADBUS1 TDI |12 11| ACBUS1 (GND) |
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* ADBUS2 TDO |14 13| GND GND |
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* |
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* ADBUS0 O L TCK ACBUS0 GND |
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* ADBUS1 O L TDI ACBUS1 GND |
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* ADBUS2 I TDO ACBUS2 n.c. |
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* ADBUS3 O H TMS ACBUS3 n.c. |
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* ADBUS4 O H nTRST |
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* ADBUS5 O H nSRST |
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* ADBUS6 - VCC |
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* ADBUS7 - GND |
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*/ |
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static int icebear_jtag_init(void) { |
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u8 buf[3]; |
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u32 bytes_written; |
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low_direction = 0x0b; /* output: TCK TDI TMS; input: TDO */ |
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low_output = 0x08; /* high: TMS; low: TCK TDI */ |
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nTRST = 0x10; |
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nSRST = 0x20; |
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if ((jtag_reset_config & RESET_TRST_OPEN_DRAIN) != 0) { |
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low_direction &= ~nTRST; /* nTRST high impedance */ |
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} |
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else { |
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low_direction |= nTRST; |
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low_output |= nTRST; |
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} |
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low_direction |= nSRST; |
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low_output |= nSRST; |
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/* initialize low byte for jtag */ |
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buf[0] = 0x80; /* command "set data bits low byte" */ |
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buf[1] = low_output; |
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buf[2] = low_direction; |
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LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]); |
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if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) ) { |
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LOG_ERROR("couldn't initialize FT2232 with 'IceBear' layout (low)"); |
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return ERROR_JTAG_INIT_FAILED; |
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} |
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high_output = 0x0; |
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high_direction = 0x00; |
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/* initialize high port */ |
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buf[0] = 0x82; /* command "set data bits high byte" */ |
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buf[1] = high_output; /* value */ |
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buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */ |
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LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]); |
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if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) ) { |
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LOG_ERROR("couldn't initialize FT2232 with 'IceBear' layout (high)"); |
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return ERROR_JTAG_INIT_FAILED; |
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} |
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return ERROR_OK; |
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} |
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static void icebear_jtag_reset(int trst, int srst) { |
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if (trst == 1) { |
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low_direction |= nTRST; |
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low_output &= ~nTRST; |
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} |
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else if (trst == 0) { |
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if ((jtag_reset_config & RESET_TRST_OPEN_DRAIN) != 0) |
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low_direction &= ~nTRST; |
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else |
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low_output |= nTRST; |
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} |
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if (srst == 1) { |
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low_output &= ~nSRST; |
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} |
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else if (srst == 0) { |
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low_output |= nSRST; |
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} |
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/* command "set data bits low byte" */ |
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BUFFER_ADD = 0x80; |
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BUFFER_ADD = low_output; |
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BUFFER_ADD = low_direction; |
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LOG_DEBUG("trst: %i, srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", trst, srst, low_output, low_direction); |
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} |