fm/mEMAC: add mEMAC frame work

The multirate ethernet media access controller (mEMAC) interfaces to
10Gbps and below Ethernet/IEEE 802.3 networks via either RGMII/RMII
interfaces or XAUI/XFI/SGMII/QSGMII using the high-speed SerDes interface.

Signed-off-by: Sandeep Singh <Sandeep@freescale.com>
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

1 files changed, 132 insertions, 0 deletions

diff --git a/drivers/net/fm/memac.c b/drivers/net/fm/memac.c
new file mode 100644
index 0000000..32c7054
--- /dev/null
+++ b/drivers/net/fm/memac.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *	Roy Zang <tie-fei.zang@freescale.com>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* MAXFRM - maximum frame length */
+#define MAXFRM_MASK	0x0000ffff
+
+#include <common.h>
+#include <phy.h>
+#include <asm/types.h>
+#include <asm/io.h>
+#include <asm/fsl_enet.h>
+#include <asm/fsl_memac.h>
+
+#include "fm.h"
+
+static void memac_init_mac(struct fsl_enet_mac *mac)
+{
+	struct memac *regs = mac->base;
+
+	/* mask all interrupt */
+	out_be32(&regs->imask, IMASK_MASK_ALL);
+
+	/* clear all events */
+	out_be32(&regs->ievent, IEVENT_CLEAR_ALL);
+
+	/* set the max receive length */
+	out_be32(&regs->maxfrm, mac->max_rx_len & MAXFRM_MASK);
+
+	/* multicast frame reception for the hash entry disable */
+	out_be32(&regs->hashtable_ctrl, 0);
+}
+
+static void memac_enable_mac(struct fsl_enet_mac *mac)
+{
+	struct memac *regs = mac->base;
+
+	setbits_be32(&regs->command_config, MEMAC_CMD_CFG_RXTX_EN);
+}
+
+static void memac_disable_mac(struct fsl_enet_mac *mac)
+{
+	struct memac *regs = mac->base;
+
+	clrbits_be32(&regs->command_config, MEMAC_CMD_CFG_RXTX_EN);
+}
+
+static void memac_set_mac_addr(struct fsl_enet_mac *mac, u8 *mac_addr)
+{
+	struct memac *regs = mac->base;
+	u32 mac_addr0, mac_addr1;
+
+	/*
+	 * if a station address of 0x12345678ABCD, perform a write to
+	 * MAC_ADDR0 of 0x78563412, MAC_ADDR1 of 0x0000CDAB
+	 */
+	mac_addr0 = (mac_addr[3] << 24) | (mac_addr[2] << 16) | \
+			(mac_addr[1] << 8)  | (mac_addr[0]);
+	out_be32(&regs->mac_addr_0, mac_addr0);
+
+	mac_addr1 = ((mac_addr[5] << 8) | mac_addr[4]) & 0x0000ffff;
+	out_be32(&regs->mac_addr_1, mac_addr1);
+}
+
+static void memac_set_interface_mode(struct fsl_enet_mac *mac,
+					phy_interface_t type, int speed)
+{
+	/* Roy need more work here */
+
+	struct memac *regs = mac->base;
+	u32 if_mode, if_status;
+
+	/* clear all bits relative with interface mode */
+	if_mode = in_be32(&regs->if_mode);
+	if_status = in_be32(&regs->if_status);
+
+	/* set interface mode */
+	switch (type) {
+	case PHY_INTERFACE_MODE_GMII:
+		if_mode &= ~IF_MODE_MASK;
+		if_mode |= IF_MODE_GMII;
+		break;
+	case PHY_INTERFACE_MODE_RGMII:
+		if_mode |= (IF_MODE_GMII | IF_MODE_RG);
+		break;
+	case PHY_INTERFACE_MODE_RMII:
+		if_mode |= (IF_MODE_GMII | IF_MODE_RM);
+		break;
+	case PHY_INTERFACE_MODE_SGMII:
+		if_mode &= ~IF_MODE_MASK;
+		if_mode |= (IF_MODE_GMII);
+		break;
+	default:
+		break;
+	}
+	/* Enable automatic speed selection */
+	if_mode |= IF_MODE_EN_AUTO;
+
+	debug(" %s, if_mode = %x\n", __func__,  if_mode);
+	debug(" %s, if_status = %x\n", __func__,  if_status);
+	out_be32(&regs->if_mode, if_mode);
+	return;
+}
+
+void init_memac(struct fsl_enet_mac *mac, void *base,
+		void *phyregs, int max_rx_len)
+{
+	mac->base = base;
+	mac->phyregs = phyregs;
+	mac->max_rx_len = max_rx_len;
+	mac->init_mac = memac_init_mac;
+	mac->enable_mac = memac_enable_mac;
+	mac->disable_mac = memac_disable_mac;
+	mac->set_mac_addr = memac_set_mac_addr;
+	mac->set_if_mode = memac_set_interface_mode;
+}