1 files changed, 149 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qualcomm/qca_7k.c b/drivers/net/ethernet/qualcomm/qca_7k.c
new file mode 100644
index 000000000000..f0066fbb44a6
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/qca_7k.c
@@ -0,0 +1,149 @@
+/*
+ *
+ *   Copyright (c) 2011, 2012, Qualcomm Atheros Communications Inc.
+ *   Copyright (c) 2014, I2SE GmbH
+ *
+ *   Permission to use, copy, modify, and/or distribute this software
+ *   for any purpose with or without fee is hereby granted, provided
+ *   that the above copyright notice and this permission notice appear
+ *   in all copies.
+ *
+ *   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ *   WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ *   WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+ *   THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+ *   CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ *   LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ *   NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ *   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+/*   This module implements the Qualcomm Atheros SPI protocol for
+ *   kernel-based SPI device.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/spi/spi.h>
+#include <linux/version.h>
+
+#include "qca_7k.h"
+
+void
+qcaspi_spi_error(struct qcaspi *qca)
+{
+	if (qca->sync != QCASPI_SYNC_READY)
+		return;
+
+	netdev_err(qca->net_dev, "spi error\n");
+	qca->sync = QCASPI_SYNC_UNKNOWN;
+	qca->stats.spi_err++;
+}
+
+int
+qcaspi_read_register(struct qcaspi *qca, u16 reg, u16 *result)
+{
+	__be16 rx_data;
+	__be16 tx_data;
+	struct spi_transfer *transfer;
+	struct spi_message *msg;
+	int ret;
+
+	tx_data = cpu_to_be16(QCA7K_SPI_READ | QCA7K_SPI_INTERNAL | reg);
+
+	if (qca->legacy_mode) {
+		msg = &qca->spi_msg1;
+		transfer = &qca->spi_xfer1;
+		transfer->tx_buf = &tx_data;
+		transfer->rx_buf = NULL;
+		transfer->len = QCASPI_CMD_LEN;
+		spi_sync(qca->spi_dev, msg);
+	} else {
+		msg = &qca->spi_msg2;
+		transfer = &qca->spi_xfer2[0];
+		transfer->tx_buf = &tx_data;
+		transfer->rx_buf = NULL;
+		transfer->len = QCASPI_CMD_LEN;
+		transfer = &qca->spi_xfer2[1];
+	}
+	transfer->tx_buf = NULL;
+	transfer->rx_buf = &rx_data;
+	transfer->len = QCASPI_CMD_LEN;
+	ret = spi_sync(qca->spi_dev, msg);
+
+	if (!ret)
+		ret = msg->status;
+
+	if (ret)
+		qcaspi_spi_error(qca);
+	else
+		*result = be16_to_cpu(rx_data);
+
+	return ret;
+}
+
+int
+qcaspi_write_register(struct qcaspi *qca, u16 reg, u16 value)
+{
+	__be16 tx_data[2];
+	struct spi_transfer *transfer;
+	struct spi_message *msg;
+	int ret;
+
+	tx_data[0] = cpu_to_be16(QCA7K_SPI_WRITE | QCA7K_SPI_INTERNAL | reg);
+	tx_data[1] = cpu_to_be16(value);
+
+	if (qca->legacy_mode) {
+		msg = &qca->spi_msg1;
+		transfer = &qca->spi_xfer1;
+		transfer->tx_buf = &tx_data[0];
+		transfer->rx_buf = NULL;
+		transfer->len = QCASPI_CMD_LEN;
+		spi_sync(qca->spi_dev, msg);
+	} else {
+		msg = &qca->spi_msg2;
+		transfer = &qca->spi_xfer2[0];
+		transfer->tx_buf = &tx_data[0];
+		transfer->rx_buf = NULL;
+		transfer->len = QCASPI_CMD_LEN;
+		transfer = &qca->spi_xfer2[1];
+	}
+	transfer->tx_buf = &tx_data[1];
+	transfer->rx_buf = NULL;
+	transfer->len = QCASPI_CMD_LEN;
+	ret = spi_sync(qca->spi_dev, msg);
+
+	if (!ret)
+		ret = msg->status;
+
+	if (ret)
+		qcaspi_spi_error(qca);
+
+	return ret;
+}
+
+int
+qcaspi_tx_cmd(struct qcaspi *qca, u16 cmd)
+{
+	__be16 tx_data;
+	struct spi_message *msg = &qca->spi_msg1;
+	struct spi_transfer *transfer = &qca->spi_xfer1;
+	int ret;
+
+	tx_data = cpu_to_be16(cmd);
+	transfer->len = sizeof(tx_data);
+	transfer->tx_buf = &tx_data;
+	transfer->rx_buf = NULL;
+
+	ret = spi_sync(qca->spi_dev, msg);
+
+	if (!ret)
+		ret = msg->status;
+
+	if (ret)
+		qcaspi_spi_error(qca);
+
+	return ret;
+}