Blackfin ethernet driver: on chip ethernet MAC controller driver

This patch implements the driver necessary use the Analog Devices
Blackfin processor's on-chip ethernet MAC controller.

[try#2]
 - add timeout control
 - kill dma_config_reg bitfields
 - some trivial cleanup

[try#3]
 - add endianess check
 - add DRV_NAME, DRV_VERSION... driver information string
 - add some comments for silicon anomaly and dma API confusion
 - some code trivial cleanup

[try#4]
 - add Blackfin latest GPIO pin mux opertion with Michael Hennerich's
  help and Dan's review
 - rewrite the DMA descriptor list operation in a more readable way
  by Joe's review

[try#5]
 - cleanup some coding style by Joe's review.

[try#6]
 - 1.1 version fix a bug when set up multicast list pointed by Mr. yoshfuji
 - rearrange the desc_list_free function.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Mike Frysinger <vapier.adi@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dan Williams <dcbw@redhat.com>
Cc: Joe Perches <joe@perches.com>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 132 insertions, 0 deletions

diff --git a/drivers/net/bfin_mac.h b/drivers/net/bfin_mac.h
new file mode 100644
index 000000000000..af87189b85fa
--- /dev/null
+++ b/drivers/net/bfin_mac.h
@@ -0,0 +1,132 @@
+/*
+ * File:        drivers/net/bfin_mac.c
+ * Based on:
+ * Maintainer:
+ *              Bryan Wu <bryan.wu@analog.com>
+ *
+ * Original author:
+ *              Luke Yang <luke.yang@analog.com>
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *              Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:        Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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, 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 ;  see the file COPYING.
+ * If not, write to the Free Software Foundation,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * PHY REGISTER NAMES
+ */
+#define PHYREG_MODECTL          0x0000
+#define PHYREG_MODESTAT         0x0001
+#define PHYREG_PHYID1           0x0002
+#define PHYREG_PHYID2           0x0003
+#define PHYREG_ANAR             0x0004
+#define PHYREG_ANLPAR           0x0005
+#define PHYREG_ANER             0x0006
+#define PHYREG_NSR              0x0010
+#define PHYREG_LBREMR           0x0011
+#define PHYREG_REC              0x0012
+#define PHYREG_10CFG            0x0013
+#define PHYREG_PHY1_1           0x0014
+#define PHYREG_PHY1_2           0x0015
+#define PHYREG_PHY2             0x0016
+#define PHYREG_TW_1             0x0017
+#define PHYREG_TW_2             0x0018
+#define PHYREG_TEST             0x0019
+
+#define PHY_RESET               0x8000
+#define PHY_ANEG_EN             0x1000
+#define PHY_DUPLEX              0x0100
+#define PHY_SPD_SET             0x2000
+
+#define BFIN_MAC_CSUM_OFFLOAD
+
+struct dma_descriptor {
+        struct dma_descriptor *next_dma_desc;
+        unsigned long start_addr;
+        unsigned short config;
+        unsigned short x_count;
+};
+
+struct status_area_rx {
+#if defined(BFIN_MAC_CSUM_OFFLOAD)
+        unsigned short ip_hdr_csum;     /* ip header checksum */
+        /* ip payload(udp or tcp or others) checksum */
+        unsigned short ip_payload_csum;
+#endif
+        unsigned long status_word;      /* the frame status word */
+};
+
+struct status_area_tx {
+        unsigned long status_word;      /* the frame status word */
+};
+
+/* use two descriptors for a packet */
+struct net_dma_desc_rx {
+        struct net_dma_desc_rx *next;
+        struct sk_buff *skb;
+        struct dma_descriptor desc_a;
+        struct dma_descriptor desc_b;
+        struct status_area_rx status;
+};
+
+/* use two descriptors for a packet */
+struct net_dma_desc_tx {
+        struct net_dma_desc_tx *next;
+        struct sk_buff *skb;
+        struct dma_descriptor desc_a;
+        struct dma_descriptor desc_b;
+        unsigned char packet[1560];
+        struct status_area_tx status;
+};
+
+struct bf537mac_local {
+        /*
+         * these are things that the kernel wants me to keep, so users
+         * can find out semi-useless statistics of how well the card is
+         * performing
+         */
+        struct net_device_stats stats;
+
+        int version;
+
+        int FlowEnabled;        /* record if data flow is active */
+        int EtherIntIVG;        /* IVG for the ethernet interrupt */
+        int RXIVG;              /* IVG for the RX completion */
+        int TXIVG;              /* IVG for the TX completion */
+        int PhyAddr;            /* PHY address */
+        int OpMode;             /* set these bits n the OPMODE regs */
+        int Port10;             /* set port speed to 10 Mbit/s */
+        int GenChksums;         /* IP checksums to be calculated */
+        int NoRcveLnth;         /* dont insert recv length at start of buffer */
+        int StripPads;          /* remove trailing pad bytes */
+        int FullDuplex;         /* set full duplex mode */
+        int Negotiate;          /* enable auto negotiation */
+        int Loopback;           /* loopback at the PHY */
+        int Cache;              /* Buffers may be cached */
+        int FlowControl;        /* flow control active */
+        int CLKIN;              /* clock in value in MHZ */
+        unsigned short IntMask; /* interrupt mask */
+        unsigned char Mac[6];   /* MAC address of the board */
+        spinlock_t lock;
+};
+
+extern void get_bf537_ether_addr(char *addr);