1 files changed, 121 insertions, 0 deletions
diff --git a/src/target/firmware/calypso/tsp.c b/src/target/firmware/calypso/tsp.c
new file mode 100644
index 00000000..5d24f48e
--- /dev/null
+++ b/src/target/firmware/calypso/tsp.c
@@ -0,0 +1,121 @@
+/* Calypso DBB internal TSP (Time Serial Port) Driver */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include <debug.h>
+#include <memory.h>
+#include <calypso/tpu.h>
+#include <calypso/tsp.h>
+
+static uint16_t tspact_state;
+
+/* initiate a TSP write through the TPU */
+void tsp_write(uint8_t dev_idx, uint8_t bitlen, uint32_t dout)
+{
+	if (bitlen <= 8) {
+		tpu_enq_move(TPUI_TX_1, dout & 0xff);
+	} else if (bitlen <= 16) {
+		tpu_enq_move(TPUI_TX_1, (dout >> 8) & 0xff);
+		tpu_enq_move(TPUI_TX_2, dout & 0xff);
+	} else if (bitlen <= 24) {
+		tpu_enq_move(TPUI_TX_1, (dout >> 16) & 0xff);
+		tpu_enq_move(TPUI_TX_2, (dout >> 8) & 0xff);
+		tpu_enq_move(TPUI_TX_3, dout & 0xff);
+	} else {
+		tpu_enq_move(TPUI_TX_1, (dout >> 24) & 0xff);
+		tpu_enq_move(TPUI_TX_2, (dout >> 16) & 0xff);
+		tpu_enq_move(TPUI_TX_3, (dout >> 8) & 0xff);
+		tpu_enq_move(TPUI_TX_4, dout & 0xff);
+	}
+	tpu_enq_move(TPUI_TSP_CTRL1, (dev_idx << 5) | (bitlen - 1));
+	tpu_enq_move(TPUI_TSP_CTRL2, TPUI_CTRL2_WR);
+}
+
+/* Configure clock edge and chip enable polarity for a device */
+void tsp_setup(uint8_t dev_idx, int clk_rising, int en_positive, int en_edge)
+{
+	uint8_t reg = TPUI_TSP_SET1 + (dev_idx / 2);
+	uint8_t val = 0;
+	uint8_t shift;
+
+	if (dev_idx & 1)
+		shift = 4;
+	else
+		shift = 0;
+
+	if (clk_rising)
+		val |= 1;
+	if (en_positive)
+		val |= 2;
+	if (en_edge)
+		val |= 4;
+
+	tpu_enq_move(reg, (val << shift));
+}
+
+/* Update the TSPACT state, including enable and disable */
+void tsp_act_update(uint16_t new_act)
+{
+	uint8_t low = new_act & 0xff;
+	uint8_t high = new_act >> 8;
+
+	if (low != (tspact_state & 0xff))
+		tpu_enq_move(TPUI_TSP_ACT_L, low);
+	if (high != (tspact_state >> 8))
+		tpu_enq_move(TPUI_TSP_ACT_U, high);
+
+	tspact_state = new_act;
+}
+
+/* Enable one or multiple TSPACT signals */
+void tsp_act_enable(uint16_t bitmask)
+{
+	uint16_t new_act = tspact_state | bitmask;
+	tsp_act_update(new_act);
+}
+
+/* Disable one or multiple TSPACT signals */
+void tsp_act_disable(uint16_t bitmask)
+{
+	uint16_t new_act = tspact_state & ~bitmask;
+	tsp_act_update(new_act);
+}
+
+/* Obtain the current tspact state */
+uint16_t tsp_act_state(void)
+{
+	return tspact_state;
+}
+
+/* Toggle one or multiple TSPACT signals */
+void tsp_act_toggle(uint16_t bitmask)
+{
+	uint16_t new_act = tspact_state ^ bitmask;
+	tsp_act_update(new_act);
+}
+
+void tsp_init(void)
+{
+	tsp_act_update(0);
+}