Twinkie: add packet injection capability

Add commands to send PD packets and to tweak individual parameters (TX
clock frequency, RX detection threshold, resistors on CCx).

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=none
BUG=chrome-os-partner:28337
TEST=verify that the PD sniffing is still working by dumping traffic
between Zinger and Samus.
Connect Twinkie to Zinger, set Rd by using "tw res NONE RD" and see VBUS
going to 5V (reading it using "ina 0").
Send a BIST mode 2 request using the following command :
tw send 2 0x1043 50000000
and see the other end starting sending BIST.

Change-Id: I3c8ddf858435ac1c17a43f59351bbaa69603a209
Reviewed-on: https://chromium-review.googlesource.com/227778
Reviewed-by: Todd Broch <tbroch@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>

1 files changed, 79 insertions, 0 deletions

diff --git a/board/twinkie/injector.h b/board/twinkie/injector.h
new file mode 100644
index 0000000000..0e360a2fdc
--- /dev/null
+++ b/board/twinkie/injector.h
@@ -0,0 +1,79 @@
+/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef __INJECTOR_H
+#define __INJECTOR_H
+
+/*
+ * Finite state machine definition for sending complex sequences
+ *
+ * the 32-bit commands have the following definition :
+ *    [31:28]   [27:0]
+ *    Command    arg
+ *   INJ_CMD_x
+ *                  [27:16]     [15:0]
+ *                   arg12       arg0
+ *              [27:24] [23:16] [15:0]
+ *               arg2     arg1   arg0
+ */
+
+/* Macros to extract values from FSM command words */
+#define INJ_CMD(w) ((w) >> 28)
+#define INJ_ARG(w) ((w) & 0x0FFFFFFF)
+#define INJ_ARG0(w) ((w) & 0x0000FFFF)
+#define INJ_ARG1(w) (((w) >> 16) & 0xFF)
+#define INJ_ARG2(w) (((w) >> 24) & 0xF)
+#define INJ_ARG12(w) (((w) >> 16) & 0xFFF)
+
+enum inj_cmd {
+	INJ_CMD_END   = 0x0, /* stop the FSM */
+	INJ_CMD_SEND  = 0x1, /* Send message on CCx */
+			     /* arg0: header arg1/2:payload index/count  */
+	INJ_CMD_WAVE  = 0x2, /* Send arbitrary waveform */
+			     /* stored at index arg1 of len arg0 */
+	INJ_CMD_HRST  = 0x3, /* Send Hard Reset on CCx */
+	INJ_CMD_WAIT  = 0x4, /* Wait for arg12 edges if arg12 != 0 */
+			     /* and timeout after arg0 ms */
+	INJ_CMD_GET   = 0x5, /* Get parameter arg1 (INJ_GET_x) at index arg0 */
+	INJ_CMD_SET   = 0x6, /* Set parameter arg1 (INJ_SET_x) with arg0 */
+	INJ_CMD_JUMP  = 0x8, /* Jump to index (as arg0) */
+	INJ_CMD_NOP   = 0xF, /* No-Operation */
+};
+
+enum inj_set {
+	INJ_SET_RESISTOR1  = 0, /* CC1 resistor as arg0 (INJ_RES_x) */
+	INJ_SET_RESISTOR2  = 1, /* CC2 resistor as arg0 (INJ_RES_x) */
+	INJ_SET_RECORD     = 2, /* Recording on/off */
+	INJ_SET_TX_SPEED   = 3, /* TX frequency is arg0 kHz */
+	INJ_SET_RX_THRESH  = 4, /* RX voltage threshold is arg0 mV */
+	INJ_SET_POLARITY   = 5, /* Polarity for other operations (INJ_POL_CC) */
+};
+
+enum inj_get {
+	INJ_GET_CC       = 0,  /* CC1/CC2 voltages in mV */
+	INJ_GET_VBUS     = 1,  /* VBUS voltage in mV and current in mA */
+	INJ_GET_VCONN    = 2, /* VCONN voltage in mV and current in mA */
+	INJ_GET_POLARITY = 3, /* Current polarity (INJ_POL_CC) */
+};
+
+enum inj_res {
+	INJ_RES_NONE  = 0,
+	INJ_RES_RA    = 1,
+	INJ_RES_RD    = 2,
+	INJ_RES_RPUSB = 3,
+	INJ_RES_RP1A5 = 4,
+	INJ_RES_RP3A0 = 5,
+};
+
+enum inj_pol {
+	INJ_POL_CC1 = 0,
+	INJ_POL_CC2 = 1,
+	INJ_POL_AUTO = 0xffff,
+};
+
+/* Number of words in the FSM command/data buffer  */
+#define INJ_CMD_COUNT 128
+
+#endif /* __INJECTOR_H */