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Michael Bruck <mbruck@digenius.de> change 'ir_scan' from 'int' to 'bool' to document...
[openocd.git] / src / jtag / ft2232.c
diff --git a/src/jtag/ft2232.c b/src/jtag/ft2232.c
index 9bcd1660168d136dd7bbbd778ec125316160a26f..27ad2ed22a00a10259f8363f341acc1bd90d5e46 100644 (file)
--- a/src/jtag/ft2232.c
+++ b/src/jtag/ft2232.c
@@ -33,23 +33,14 @@
 #include "config.h"
 #endif
 
-#if IS_CYGWIN == 1
-#include "windows.h"
-#endif
-
-#include "replacements.h"
-
 /* project specific includes */
-#include "log.h"
-#include "types.h"
 #include "jtag.h"
-#include "configuration.h"
 #include "time_support.h"
 
-/* system includes */
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
+#if IS_CYGWIN == 1
+#include <windows.h>
+#endif
+
 
 /* FT2232 access library includes */
 #if BUILD_FT2232_FTD2XX == 1
@@ -114,6 +105,7 @@ static int  comstick_init(void);
 static int  stm32stick_init(void);
 static int  axm0432_jtag_init(void);
 static int sheevaplug_init(void);
+static int icebear_jtag_init(void);
 
 /* reset procedures for supported layouts */
 static void usbjtag_reset(int trst, int srst);
@@ -125,6 +117,7 @@ static void comstick_reset(int trst, int srst);
 static void stm32stick_reset(int trst, int srst);
 static void axm0432_jtag_reset(int trst, int srst);
 static void sheevaplug_reset(int trst, int srst);
+static void icebear_jtag_reset(int trst, int srst);
 
 /* blink procedures for layouts that support a blinking led */
 static void olimex_jtag_blink(void);
@@ -146,6 +139,7 @@ ft2232_layout_t            ft2232_layouts[] =
        { "stm32stick",           stm32stick_init,           stm32stick_reset,   NULL                    },
        { "axm0432_jtag",         axm0432_jtag_init,         axm0432_jtag_reset, NULL                    },
        {"sheevaplug",            sheevaplug_init,           sheevaplug_reset,   NULL                    },
+       { "icebear",              icebear_jtag_init,         icebear_jtag_reset, NULL                    },
        { NULL,                   NULL,                      NULL,               NULL                    },
 };
 
@@ -579,7 +573,7 @@ static void ft2232_add_pathmove(pathmove_command_t* cmd)
 }
 
 
-void ft2232_add_scan(int ir_scan, enum scan_type type, u8* buffer, int scan_size)
+void ft2232_add_scan(bool ir_scan, enum scan_type type, u8* buffer, int scan_size)
 {
        int num_bytes = (scan_size + 7) / 8;
        int bits_left = scan_size;
@@ -1589,7 +1583,14 @@ static int ft2232_execute_queue()
        {
                if (ft2232_execute_command(cmd) != ERROR_OK)
                        retval = ERROR_JTAG_QUEUE_FAILED;
+               /* Start reading input before FT2232 TX buffer fills up */
                cmd = cmd->next;
+               if (ft2232_expect_read > 256)
+               {
+                       if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
+                               retval = ERROR_JTAG_QUEUE_FAILED;
+                       first_unsent = cmd;
+               }
        }
 
        if (require_send > 0)
@@ -2654,3 +2655,105 @@ static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd)
 
        return retval;
 }
+
+/* ---------------------------------------------------------------------
+ * Support for IceBear JTAG adapter from Section5:
+ *     http://section5.ch/icebear
+ *
+ * Author: Sten, debian@sansys-electronic.com
+ */
+
+/* Icebear pin layout
+ *
+ * ADBUS5 (nEMU) nSRST | 2   1|        GND (10k->VCC)
+ * GND GND             | 4   3|        n.c.
+ * ADBUS3 TMS          | 6   5|        ADBUS6 VCC
+ * ADBUS0 TCK          | 8   7|        ADBUS7 (GND)
+ * ADBUS4 nTRST                |10   9|        ACBUS0 (GND)
+ * ADBUS1 TDI          |12  11|        ACBUS1 (GND)
+ * ADBUS2 TDO          |14  13|        GND GND
+ *
+ * ADBUS0 O L TCK              ACBUS0 GND
+ * ADBUS1 O L TDI              ACBUS1 GND
+ * ADBUS2 I   TDO              ACBUS2 n.c.
+ * ADBUS3 O H TMS              ACBUS3 n.c.
+ * ADBUS4 O H nTRST
+ * ADBUS5 O H nSRST
+ * ADBUS6 -   VCC
+ * ADBUS7 -   GND
+ */
+static int icebear_jtag_init(void) {
+       u8  buf[3];
+       u32 bytes_written;
+
+       low_direction   = 0x0b; /* output: TCK TDI TMS; input: TDO */
+       low_output      = 0x08; /* high: TMS; low: TCK TDI */
+       nTRST           = 0x10;
+       nSRST           = 0x20;
+
+       if ((jtag_reset_config & RESET_TRST_OPEN_DRAIN) != 0) {
+               low_direction   &= ~nTRST;      /* nTRST high impedance */
+       }
+       else {
+               low_direction   |= nTRST;
+               low_output      |= nTRST;
+       }
+
+       low_direction   |= nSRST;
+       low_output      |= nSRST;
+
+       /* initialize low byte for jtag */
+       buf[0] = 0x80;          /* command "set data bits low byte" */
+       buf[1] = low_output;
+       buf[2] = low_direction;
+       LOG_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) ) {
+               LOG_ERROR("couldn't initialize FT2232 with 'IceBear' layout (low)");
+               return ERROR_JTAG_INIT_FAILED;
+       }
+
+       high_output    = 0x0;
+       high_direction = 0x00;
+
+
+       /* 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) */
+       LOG_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) ) {
+               LOG_ERROR("couldn't initialize FT2232 with 'IceBear' layout (high)");
+               return ERROR_JTAG_INIT_FAILED;
+       }
+
+       return ERROR_OK;
+}
+
+static void icebear_jtag_reset(int trst, int srst) {
+
+       if (trst == 1) {
+               low_direction   |= nTRST;
+               low_output      &= ~nTRST;
+       }
+       else if (trst == 0) {
+               if ((jtag_reset_config & RESET_TRST_OPEN_DRAIN) != 0)
+                       low_direction   &= ~nTRST;
+               else
+                       low_output      |= nTRST;
+       }
+
+       if (srst == 1) {
+               low_output &= ~nSRST;
+       }
+       else if (srst == 0) {
+               low_output |= nSRST;
+       }
+
+       /* command "set data bits low byte" */
+       BUFFER_ADD = 0x80;
+       BUFFER_ADD = low_output;
+       BUFFER_ADD = low_direction;
+       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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