i.MX: Add FEC Ethernet Emulator

This is based on mcf_fec.c FEC implementation for Coldfire

  * A generic PHY was added (borrowwed from LAN9118)
  * The buffer management is also modified as buffers are
    slightly different between Coldfire and i.MX

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: fb314f8a120aa49f8f6ad886f312c649b484fb5a.1441057361.git.jcd@tribudubois.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 113 insertions, 0 deletions

diff --git a/include/hw/net/imx_fec.h b/include/hw/net/imx_fec.h
new file mode 100644
index 0000000..cbf8650
--- /dev/null
+++ b/include/hw/net/imx_fec.h
@@ -0,0 +1,113 @@
+/*
+ * i.MX Fast Ethernet Controller emulation.
+ *
+ * Copyright (c) 2013 Jean-Christophe Dubois. <jcd@tribudubois.net>
+ *
+ * Based on Coldfire Fast Ethernet Controller emulation.
+ *
+ * Copyright (c) 2007 CodeSourcery.
+ *
+ *  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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IMX_FEC_H
+#define IMX_FEC_H
+
+#define TYPE_IMX_FEC "imx.fec"
+#define IMX_FEC(obj) OBJECT_CHECK(IMXFECState, (obj), TYPE_IMX_FEC)
+
+#include "hw/sysbus.h"
+#include "net/net.h"
+
+#define FEC_MAX_FRAME_SIZE 2032
+
+#define FEC_INT_HB      (1 << 31)
+#define FEC_INT_BABR    (1 << 30)
+#define FEC_INT_BABT    (1 << 29)
+#define FEC_INT_GRA     (1 << 28)
+#define FEC_INT_TXF     (1 << 27)
+#define FEC_INT_TXB     (1 << 26)
+#define FEC_INT_RXF     (1 << 25)
+#define FEC_INT_RXB     (1 << 24)
+#define FEC_INT_MII     (1 << 23)
+#define FEC_INT_EBERR   (1 << 22)
+#define FEC_INT_LC      (1 << 21)
+#define FEC_INT_RL      (1 << 20)
+#define FEC_INT_UN      (1 << 19)
+
+#define FEC_EN      2
+#define FEC_RESET   1
+
+/* Buffer Descriptor.  */
+typedef struct {
+    uint16_t length;
+    uint16_t flags;
+    uint32_t data;
+} IMXFECBufDesc;
+
+#define FEC_BD_R    (1 << 15)
+#define FEC_BD_E    (1 << 15)
+#define FEC_BD_O1   (1 << 14)
+#define FEC_BD_W    (1 << 13)
+#define FEC_BD_O2   (1 << 12)
+#define FEC_BD_L    (1 << 11)
+#define FEC_BD_TC   (1 << 10)
+#define FEC_BD_ABC  (1 << 9)
+#define FEC_BD_M    (1 << 8)
+#define FEC_BD_BC   (1 << 7)
+#define FEC_BD_MC   (1 << 6)
+#define FEC_BD_LG   (1 << 5)
+#define FEC_BD_NO   (1 << 4)
+#define FEC_BD_CR   (1 << 2)
+#define FEC_BD_OV   (1 << 1)
+#define FEC_BD_TR   (1 << 0)
+
+typedef struct IMXFECState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    NICState *nic;
+    NICConf conf;
+    qemu_irq irq;
+    MemoryRegion iomem;
+
+    uint32_t irq_state;
+    uint32_t eir;
+    uint32_t eimr;
+    uint32_t rx_enabled;
+    uint32_t rx_descriptor;
+    uint32_t tx_descriptor;
+    uint32_t ecr;
+    uint32_t mmfr;
+    uint32_t mscr;
+    uint32_t mibc;
+    uint32_t rcr;
+    uint32_t tcr;
+    uint32_t tfwr;
+    uint32_t frsr;
+    uint32_t erdsr;
+    uint32_t etdsr;
+    uint32_t emrbr;
+    uint32_t miigsk_cfgr;
+    uint32_t miigsk_enr;
+
+    uint32_t phy_status;
+    uint32_t phy_control;
+    uint32_t phy_advertise;
+    uint32_t phy_int;
+    uint32_t phy_int_mask;
+} IMXFECState;
+
+#endif