[PATCH] ft2232_spi: JTAGKey support, 2nd try

[Jörg Fischer]

Hi,

here is the 2nd version of the patch against current trunk.
Changes:
- renamed some vars
- JTAGkey is now displayed as "JTAGkey" instead of "4232H"
- and documented in manpage

Signed-off-by: Joerg Fischer

Index: flashrom.8
===================================================================
--- flashrom.8	(Revision 1109)
+++ flashrom.8	(Arbeitskopie)
@@ -177,11 +177,11 @@
 .sp
 .BR "* atahpt" " (for flash ROMs on Highpoint ATA/RAID controllers)"
 .sp
-.BR "* it87spi" " (for flash ROMs behind an ITE IT87xx Super I/O LPC/SPI\
+.BR "* it87spi" " (for flash ROMs behind an ITE IT87xx Super I/O LPC/SPI \
 translation unit)"
 .sp
-.BR "* ft2232_spi" " (for SPI flash ROMs attached to a FT2232H/FT4232H based\
-USB SPI programmer)"
+.BR "* ft2232_spi" " (for SPI flash ROMs attached to a FT2232H/FT4232H/JTAGkey \
+based USB SPI programmer)"
 .sp
 .BR "* serprog" " (for flash ROMs attached to a programmer speaking serprog)"
 .sp
@@ -351,7 +351,7 @@
 syntax where
 .B model
 can be any of
-.BR 2232H ", or " 4232H
+.BR 2232H ", "JTAGkey ", or " 4232H
 and
 .B interface
 can be any of
Index: ft2232_spi.c
===================================================================
--- ft2232_spi.c	(Revision 1109)
+++ ft2232_spi.c	(Arbeitskopie)
@@ -45,8 +45,31 @@
 #define BITMODE_BITBANG_NORMAL	1
 #define BITMODE_BITBANG_SPI	2

+        /* Set data bits low-byte command:
+         *  value: 0x08  CS=high, DI=low, DO=low, SK=low
+         *    dir: 0x0b  CS=output, DI=input, DO=output, SK=output
+         *
+         * Jtagkey(2) needs to enable its output via Bit4 / GPIOL0
+         *  value: 0x18  OE=high, CS=high, DI=low, DO=low, SK=low
+         *    dir: 0x1b  OE=output, CS=output, DI=input, DO=output, SK=output
+         *
+         */
+static unsigned char cs_bits = 0x08;
+static unsigned char pindir = 0x0b;
 static struct ftdi_context ftdic_context;

+#define AMONTEC_JTAGKEY_PID	0xCFF8
+
+static const char * getFT2232name(int ft2232_type)
+{
+	switch(ft2232_type)  {
+		case FTDI_FT2232H: return "2232H"; 
+		case AMONTEC_JTAGKEY_PID: return "JTAGkey";
+		default: return "4232H";
+	}
+	return "4232H";
+}
+
 static int send_buf(struct ftdi_context *ftdic, const unsigned char *buf, int size)
 {
    int r;
@@ -86,6 +109,12 @@
    		ft2232_type = FTDI_FT2232H;
    	else if (!strcasecmp(arg, "4232H"))
    		ft2232_type = FTDI_FT4232H;
+		else if (!strcasecmp(arg, "jtagkey")) {
+			ft2232_type = AMONTEC_JTAGKEY_PID;
+			ft2232_interface = INTERFACE_A;
+			cs_bits = 0x18;
+			pindir	= 0x1b;
+		}
    	else {
    		msg_perr("Error: Invalid device type specified.\n");
    		free(arg);
@@ -110,7 +139,7 @@
    }
    free(arg);
    msg_pdbg("Using device type %s ",
-		     (ft2232_type == FTDI_FT2232H) ? "2232H" : "4232H");
+		     getFT2232name(ft2232_type));
    msg_pdbg("interface %s\n",
    	     (ft2232_interface == INTERFACE_A) ? "A" : "B");

@@ -178,14 +207,9 @@
    	return -1;

msg_pdbg("Set data bits\n");
-	/* Set data bits low-byte command:
-	 *  value: 0x08  CS=high, DI=low, DO=low, SK=low
-	 *    dir: 0x0b  CS=output, DI=input, DO=output, SK=output
-	 */
-#define CS_BIT 0x08
    buf[0] = SET_BITS_LOW;
-	buf[1] = CS_BIT;
-	buf[2] = 0x0b;
+	buf[1] = cs_bits;
+	buf[2] = pindir;
    if (send_buf(ftdic, buf, 3))
    	return -1;

@@ -230,8 +254,8 @@
     */
    msg_pspew("Assert CS#\n");
    buf[i++] = SET_BITS_LOW;
-	buf[i++] = 0 & ~CS_BIT; /* assertive */
-	buf[i++] = 0x0b;
+	buf[i++] = 0 & ~cs_bits; /* assertive */
+	buf[i++] = pindir;

if (writecnt) {
    	buf[i++] = 0x11;
@@ -272,8 +296,8 @@

msg_pspew("De-assert CS#\n");
    buf[i++] = SET_BITS_LOW;
-	buf[i++] = CS_BIT;
-	buf[i++] = 0x0b;
+	buf[i++] = cs_bits;
+	buf[i++] = pindir;
    ret = send_buf(ftdic, buf, i);
    failed |= ret;
    if (ret)