Add support for the GOEPEL PicoTAP programmer

http://www.goepel.com/en/jtagboundary-scan/hardware/picotap.html

This device is actually a JTAG adapter, but since it uses standard
FT2232 A interface pins, it can be easily used as SPI programmer
(tested it here successfully). PicoTAP supports only 5V output, so one
needs to reduce this to 3.3V in a same manner as DLP Design DLP-USB1232H, see

  http://flashrom.org/FT2232SPI_Programmer#DLP_Design_DLP-USB1232H

for details.

The PicoTAP pin-out is as follows:

  PicoTAP |  SPI
 ---------+-------
    TCK   | SCLK
    TMS   |  CS#
    TDI   |  SO
    TDO   |  SI
   /TRST  |  -
    GND   |  GND
    +5V   |  VCC, HOLD# & WP# after 3.3V regulator

I managed to run PicoTAP in 10MHz, 15MHz and 30MHz modes (by forcing
DIVIDE_BY), against SST25VF016B SPI flash, read/write/erase all worked
fine (write seems somewhat slow).

Corresponding to flashrom svn r1453.

Signed-off-by: Samir Ibradžić <sibradzic@gmail.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

3 files changed, 15 insertions, 3 deletions

diff --git a/flashrom.8 b/flashrom.8
index 7a012de8c..a8f466040 100644
--- a/flashrom.8
+++ b/flashrom.8
@@ -199,8 +199,8 @@ cards)"
 based USB SPI programmer), including the DLP Design DLP-USB1232H, \
 FTDI FT2232H Mini-Module, FTDI FT4232H Mini-Module, openbiosprog-spi, Amontec \
 JTAGkey/JTAGkey-tiny/JTAGkey-2, Dangerous Prototypes Bus Blaster, \
-Olimex ARM-USB-TINY/-H, Olimex ARM-USB-OCD/-H, and TIAO/DIYGADGET USB
-Multi-Protocol Adapter (TUMPA).
+Olimex ARM-USB-TINY/-H, Olimex ARM-USB-OCD/-H, TIAO/DIYGADGET USB
+Multi-Protocol Adapter (TUMPA), and GOEPEL PicoTAP.
 .sp
 .BR "* serprog" " (for flash ROMs attached to a programmer speaking serprog), \
 including AVR flasher by Urja Rannikko, AVR flasher by eightdot, \
@@ -443,7 +443,7 @@ syntax where
 can be
 .BR 2232H ", " 4232H ", " jtagkey ", " busblaster ", " openmoko ", " \
 arm-usb-tiny ", " arm-usb-tiny-h ", " arm-usb-ocd ", " arm-usb-ocd-h \
-", or " tumpa
+", " tumpa ", or " picotap
 and
 .B interface
 can be
diff --git a/ft2232_spi.c b/ft2232_spi.c
index 7a52718b6..8d89ea10d 100644
--- a/ft2232_spi.c
+++ b/ft2232_spi.c
@@ -37,6 +37,9 @@
 #define TIAO_TUMPA_PID		0x8a98
 #define AMONTEC_JTAGKEY_PID	0xCFF8
 
+#define GOEPEL_VID		0x096C
+#define GOEPEL_PICOTAP_PID	0x1449
+
 #define FIC_VID			0x1457
 #define OPENMOKO_DBGBOARD_PID	0x5118
 
@@ -51,6 +54,7 @@ const struct usbdev_status devs_ft2232spi[] = {
 	{FTDI_VID, FTDI_FT4232H_PID, OK, "FTDI", "FT4232H"},
 	{FTDI_VID, TIAO_TUMPA_PID, OK, "TIAO", "USB Multi-Protocol Adapter"},
 	{FTDI_VID, AMONTEC_JTAGKEY_PID, OK, "Amontec", "JTAGkey"},
+	{GOEPEL_VID, GOEPEL_PICOTAP_PID, OK, "GOEPEL", "PicoTAP"},
 	{FIC_VID, OPENMOKO_DBGBOARD_PID, OK, "FIC",
 		"OpenMoko Neo1973 Debug board (V2+)"},
 	{OLIMEX_VID, OLIMEX_ARM_OCD_PID, NT, "Olimex", "ARM-USB-OCD"},
@@ -176,6 +180,10 @@ int ft2232_spi_init(void)
 			ft2232_interface = INTERFACE_A;
 			cs_bits = 0x18;
 			pindir = 0x1b;
+		} else if (!strcasecmp(arg, "picotap")) {
+			ft2232_vid = GOEPEL_VID;
+			ft2232_type = GOEPEL_PICOTAP_PID;
+			ft2232_interface = INTERFACE_A;
 		} else if (!strcasecmp(arg, "tumpa")) {
 			/* Interface A is SPI1, B is SPI2. */
 			ft2232_type = TIAO_TUMPA_PID;
diff --git a/util/z60_flashrom.rules b/util/z60_flashrom.rules
index 2b4ab6db9..8456a0426 100644
--- a/util/z60_flashrom.rules
+++ b/util/z60_flashrom.rules
@@ -56,6 +56,10 @@ ATTRS{idVendor}=="1457", ATTRS{idProduct}=="5118", MODE="664", GROUP="plugdev"
 # http://www.ftdichip.com/Products/EvaluationKits/FT4232H_MiniModule.htm
 ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6011", MODE="664", GROUP="plugdev"
 
+# GOEPEL PicoTAP
+# http://www.goepel.com/jtagboundary-scan/hardware/picotap.html
+ATTRS{idVendor}=="096c", ATTRS{idProduct}=="1449", MODE="664", GROUP="plugdev"
+
 # Olimex ARM-USB-OCD
 # http://olimex.com/dev/arm-usb-ocd.html
 ATTRS{idVendor}=="15ba", ATTRS{idProduct}=="0003", MODE="664", GROUP="plugdev"