forked from Minki/linux
a8de5ce989
Spelling fixes in arch/ppc/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Paul Mackerras <paulus@samba.org>
1985 lines
50 KiB
C
1985 lines
50 KiB
C
/*
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* Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
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* Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
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*
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* This version of the driver is specific to the FADS implementation,
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* since the board contains control registers external to the processor
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* for the control of the LevelOne LXT970 transceiver. The MPC860T manual
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* describes connections using the internal parallel port I/O, which
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* is basically all of Port D.
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*
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* Includes support for the following PHYs: QS6612, LXT970, LXT971/2.
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*
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* Right now, I am very wasteful with the buffers. I allocate memory
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* pages and then divide them into 2K frame buffers. This way I know I
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* have buffers large enough to hold one frame within one buffer descriptor.
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* Once I get this working, I will use 64 or 128 byte CPM buffers, which
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* will be much more memory efficient and will easily handle lots of
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* small packets.
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*
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* Much better multiple PHY support by Magnus Damm.
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* Copyright (c) 2000 Ericsson Radio Systems AB.
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*
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* Make use of MII for PHY control configurable.
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* Some fixes.
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* Copyright (c) 2000-2002 Wolfgang Denk, DENX Software Engineering.
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*
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* Support for AMD AM79C874 added.
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* Thomas Lange, thomas@corelatus.com
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/ptrace.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/bitops.h>
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#ifdef CONFIG_FEC_PACKETHOOK
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#include <linux/pkthook.h>
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#endif
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#include <asm/8xx_immap.h>
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#include <asm/pgtable.h>
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#include <asm/mpc8xx.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/commproc.h>
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#ifdef CONFIG_USE_MDIO
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/* Forward declarations of some structures to support different PHYs
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*/
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typedef struct {
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uint mii_data;
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void (*funct)(uint mii_reg, struct net_device *dev);
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} phy_cmd_t;
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typedef struct {
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uint id;
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char *name;
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const phy_cmd_t *config;
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const phy_cmd_t *startup;
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const phy_cmd_t *ack_int;
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const phy_cmd_t *shutdown;
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} phy_info_t;
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#endif /* CONFIG_USE_MDIO */
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/* The number of Tx and Rx buffers. These are allocated from the page
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* pool. The code may assume these are power of two, so it is best
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* to keep them that size.
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* We don't need to allocate pages for the transmitter. We just use
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* the skbuffer directly.
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*/
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#ifdef CONFIG_ENET_BIG_BUFFERS
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#define FEC_ENET_RX_PAGES 16
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#define FEC_ENET_RX_FRSIZE 2048
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#define FEC_ENET_RX_FRPPG (PAGE_SIZE / FEC_ENET_RX_FRSIZE)
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#define RX_RING_SIZE (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES)
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#define TX_RING_SIZE 16 /* Must be power of two */
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#define TX_RING_MOD_MASK 15 /* for this to work */
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#else
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#define FEC_ENET_RX_PAGES 4
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#define FEC_ENET_RX_FRSIZE 2048
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#define FEC_ENET_RX_FRPPG (PAGE_SIZE / FEC_ENET_RX_FRSIZE)
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#define RX_RING_SIZE (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES)
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#define TX_RING_SIZE 8 /* Must be power of two */
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#define TX_RING_MOD_MASK 7 /* for this to work */
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#endif
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/* Interrupt events/masks.
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*/
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#define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */
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#define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */
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#define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */
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#define FEC_ENET_GRA ((uint)0x10000000) /* Graceful stop complete */
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#define FEC_ENET_TXF ((uint)0x08000000) /* Full frame transmitted */
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#define FEC_ENET_TXB ((uint)0x04000000) /* A buffer was transmitted */
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#define FEC_ENET_RXF ((uint)0x02000000) /* Full frame received */
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#define FEC_ENET_RXB ((uint)0x01000000) /* A buffer was received */
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#define FEC_ENET_MII ((uint)0x00800000) /* MII interrupt */
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#define FEC_ENET_EBERR ((uint)0x00400000) /* SDMA bus error */
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/*
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*/
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#define FEC_ECNTRL_PINMUX 0x00000004
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#define FEC_ECNTRL_ETHER_EN 0x00000002
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#define FEC_ECNTRL_RESET 0x00000001
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#define FEC_RCNTRL_BC_REJ 0x00000010
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#define FEC_RCNTRL_PROM 0x00000008
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#define FEC_RCNTRL_MII_MODE 0x00000004
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#define FEC_RCNTRL_DRT 0x00000002
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#define FEC_RCNTRL_LOOP 0x00000001
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#define FEC_TCNTRL_FDEN 0x00000004
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#define FEC_TCNTRL_HBC 0x00000002
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#define FEC_TCNTRL_GTS 0x00000001
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/* Delay to wait for FEC reset command to complete (in us)
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*/
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#define FEC_RESET_DELAY 50
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/* The FEC stores dest/src/type, data, and checksum for receive packets.
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*/
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#define PKT_MAXBUF_SIZE 1518
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#define PKT_MINBUF_SIZE 64
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#define PKT_MAXBLR_SIZE 1520
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/* The FEC buffer descriptors track the ring buffers. The rx_bd_base and
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* tx_bd_base always point to the base of the buffer descriptors. The
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* cur_rx and cur_tx point to the currently available buffer.
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* The dirty_tx tracks the current buffer that is being sent by the
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* controller. The cur_tx and dirty_tx are equal under both completely
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* empty and completely full conditions. The empty/ready indicator in
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* the buffer descriptor determines the actual condition.
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*/
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struct fec_enet_private {
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/* The saved address of a sent-in-place packet/buffer, for skfree(). */
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struct sk_buff* tx_skbuff[TX_RING_SIZE];
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ushort skb_cur;
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ushort skb_dirty;
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/* CPM dual port RAM relative addresses.
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*/
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cbd_t *rx_bd_base; /* Address of Rx and Tx buffers. */
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cbd_t *tx_bd_base;
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cbd_t *cur_rx, *cur_tx; /* The next free ring entry */
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cbd_t *dirty_tx; /* The ring entries to be free()ed. */
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/* Virtual addresses for the receive buffers because we can't
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* do a __va() on them anymore.
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*/
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unsigned char *rx_vaddr[RX_RING_SIZE];
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struct net_device_stats stats;
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uint tx_full;
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spinlock_t lock;
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#ifdef CONFIG_USE_MDIO
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uint phy_id;
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uint phy_id_done;
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uint phy_status;
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uint phy_speed;
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phy_info_t *phy;
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struct work_struct phy_task;
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struct net_device *dev;
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uint sequence_done;
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uint phy_addr;
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#endif /* CONFIG_USE_MDIO */
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int link;
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int old_link;
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int full_duplex;
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#ifdef CONFIG_FEC_PACKETHOOK
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unsigned long ph_lock;
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fec_ph_func *ph_rxhandler;
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fec_ph_func *ph_txhandler;
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__u16 ph_proto;
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volatile __u32 *ph_regaddr;
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void *ph_priv;
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#endif
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};
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static int fec_enet_open(struct net_device *dev);
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static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
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#ifdef CONFIG_USE_MDIO
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static void fec_enet_mii(struct net_device *dev);
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#endif /* CONFIG_USE_MDIO */
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static irqreturn_t fec_enet_interrupt(int irq, void * dev_id);
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#ifdef CONFIG_FEC_PACKETHOOK
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static void fec_enet_tx(struct net_device *dev, __u32 regval);
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static void fec_enet_rx(struct net_device *dev, __u32 regval);
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#else
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static void fec_enet_tx(struct net_device *dev);
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static void fec_enet_rx(struct net_device *dev);
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#endif
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static int fec_enet_close(struct net_device *dev);
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static struct net_device_stats *fec_enet_get_stats(struct net_device *dev);
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static void set_multicast_list(struct net_device *dev);
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static void fec_restart(struct net_device *dev, int duplex);
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static void fec_stop(struct net_device *dev);
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static ushort my_enet_addr[3];
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#ifdef CONFIG_USE_MDIO
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/* MII processing. We keep this as simple as possible. Requests are
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* placed on the list (if there is room). When the request is finished
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* by the MII, an optional function may be called.
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*/
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typedef struct mii_list {
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uint mii_regval;
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void (*mii_func)(uint val, struct net_device *dev);
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struct mii_list *mii_next;
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} mii_list_t;
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#define NMII 20
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mii_list_t mii_cmds[NMII];
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mii_list_t *mii_free;
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mii_list_t *mii_head;
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mii_list_t *mii_tail;
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static int mii_queue(struct net_device *dev, int request,
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void (*func)(uint, struct net_device *));
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/* Make MII read/write commands for the FEC.
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*/
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#define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
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#define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | \
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(VAL & 0xffff))
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#define mk_mii_end 0
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#endif /* CONFIG_USE_MDIO */
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/* Transmitter timeout.
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*/
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#define TX_TIMEOUT (2*HZ)
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#ifdef CONFIG_USE_MDIO
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/* Register definitions for the PHY.
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*/
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#define MII_REG_CR 0 /* Control Register */
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#define MII_REG_SR 1 /* Status Register */
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#define MII_REG_PHYIR1 2 /* PHY Identification Register 1 */
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#define MII_REG_PHYIR2 3 /* PHY Identification Register 2 */
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#define MII_REG_ANAR 4 /* A-N Advertisement Register */
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#define MII_REG_ANLPAR 5 /* A-N Link Partner Ability Register */
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#define MII_REG_ANER 6 /* A-N Expansion Register */
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#define MII_REG_ANNPTR 7 /* A-N Next Page Transmit Register */
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#define MII_REG_ANLPRNPR 8 /* A-N Link Partner Received Next Page Reg. */
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/* values for phy_status */
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#define PHY_CONF_ANE 0x0001 /* 1 auto-negotiation enabled */
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#define PHY_CONF_LOOP 0x0002 /* 1 loopback mode enabled */
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#define PHY_CONF_SPMASK 0x00f0 /* mask for speed */
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#define PHY_CONF_10HDX 0x0010 /* 10 Mbit half duplex supported */
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#define PHY_CONF_10FDX 0x0020 /* 10 Mbit full duplex supported */
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#define PHY_CONF_100HDX 0x0040 /* 100 Mbit half duplex supported */
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#define PHY_CONF_100FDX 0x0080 /* 100 Mbit full duplex supported */
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#define PHY_STAT_LINK 0x0100 /* 1 up - 0 down */
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#define PHY_STAT_FAULT 0x0200 /* 1 remote fault */
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#define PHY_STAT_ANC 0x0400 /* 1 auto-negotiation complete */
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#define PHY_STAT_SPMASK 0xf000 /* mask for speed */
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#define PHY_STAT_10HDX 0x1000 /* 10 Mbit half duplex selected */
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#define PHY_STAT_10FDX 0x2000 /* 10 Mbit full duplex selected */
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#define PHY_STAT_100HDX 0x4000 /* 100 Mbit half duplex selected */
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#define PHY_STAT_100FDX 0x8000 /* 100 Mbit full duplex selected */
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#endif /* CONFIG_USE_MDIO */
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#ifdef CONFIG_FEC_PACKETHOOK
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int
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fec_register_ph(struct net_device *dev, fec_ph_func *rxfun, fec_ph_func *txfun,
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__u16 proto, volatile __u32 *regaddr, void *priv)
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{
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struct fec_enet_private *fep;
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int retval = 0;
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fep = dev->priv;
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if (test_and_set_bit(0, (void*)&fep->ph_lock) != 0) {
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/* Someone is messing with the packet hook */
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return -EAGAIN;
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}
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if (fep->ph_rxhandler != NULL || fep->ph_txhandler != NULL) {
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retval = -EBUSY;
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goto out;
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}
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fep->ph_rxhandler = rxfun;
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fep->ph_txhandler = txfun;
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fep->ph_proto = proto;
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fep->ph_regaddr = regaddr;
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fep->ph_priv = priv;
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out:
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fep->ph_lock = 0;
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return retval;
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}
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int
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fec_unregister_ph(struct net_device *dev)
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{
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struct fec_enet_private *fep;
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int retval = 0;
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fep = dev->priv;
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if (test_and_set_bit(0, (void*)&fep->ph_lock) != 0) {
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/* Someone is messing with the packet hook */
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return -EAGAIN;
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}
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fep->ph_rxhandler = fep->ph_txhandler = NULL;
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fep->ph_proto = 0;
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fep->ph_regaddr = NULL;
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fep->ph_priv = NULL;
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fep->ph_lock = 0;
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return retval;
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}
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EXPORT_SYMBOL(fec_register_ph);
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EXPORT_SYMBOL(fec_unregister_ph);
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#endif /* CONFIG_FEC_PACKETHOOK */
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static int
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fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct fec_enet_private *fep;
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volatile fec_t *fecp;
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volatile cbd_t *bdp;
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fep = dev->priv;
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fecp = (volatile fec_t*)dev->base_addr;
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if (!fep->link) {
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/* Link is down or autonegotiation is in progress. */
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return 1;
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}
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/* Fill in a Tx ring entry */
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bdp = fep->cur_tx;
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#ifndef final_version
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if (bdp->cbd_sc & BD_ENET_TX_READY) {
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/* Ooops. All transmit buffers are full. Bail out.
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* This should not happen, since dev->tbusy should be set.
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*/
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printk("%s: tx queue full!.\n", dev->name);
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return 1;
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}
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#endif
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/* Clear all of the status flags.
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*/
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bdp->cbd_sc &= ~BD_ENET_TX_STATS;
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/* Set buffer length and buffer pointer.
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*/
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bdp->cbd_bufaddr = __pa(skb->data);
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bdp->cbd_datlen = skb->len;
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/* Save skb pointer.
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*/
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fep->tx_skbuff[fep->skb_cur] = skb;
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fep->stats.tx_bytes += skb->len;
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fep->skb_cur = (fep->skb_cur+1) & TX_RING_MOD_MASK;
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/* Push the data cache so the CPM does not get stale memory
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* data.
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*/
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flush_dcache_range((unsigned long)skb->data,
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(unsigned long)skb->data + skb->len);
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/* disable interrupts while triggering transmit */
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spin_lock_irq(&fep->lock);
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/* Send it on its way. Tell FEC its ready, interrupt when done,
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* its the last BD of the frame, and to put the CRC on the end.
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*/
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bdp->cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_INTR
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| BD_ENET_TX_LAST | BD_ENET_TX_TC);
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dev->trans_start = jiffies;
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/* Trigger transmission start */
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fecp->fec_x_des_active = 0x01000000;
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/* If this was the last BD in the ring, start at the beginning again.
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*/
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if (bdp->cbd_sc & BD_ENET_TX_WRAP) {
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bdp = fep->tx_bd_base;
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} else {
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bdp++;
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}
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if (bdp->cbd_sc & BD_ENET_TX_READY) {
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netif_stop_queue(dev);
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fep->tx_full = 1;
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}
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fep->cur_tx = (cbd_t *)bdp;
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spin_unlock_irq(&fep->lock);
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return 0;
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}
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static void
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fec_timeout(struct net_device *dev)
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{
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struct fec_enet_private *fep = dev->priv;
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printk("%s: transmit timed out.\n", dev->name);
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fep->stats.tx_errors++;
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#ifndef final_version
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{
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int i;
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cbd_t *bdp;
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printk("Ring data dump: cur_tx %lx%s, dirty_tx %lx cur_rx: %lx\n",
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(unsigned long)fep->cur_tx, fep->tx_full ? " (full)" : "",
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(unsigned long)fep->dirty_tx,
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(unsigned long)fep->cur_rx);
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bdp = fep->tx_bd_base;
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printk(" tx: %u buffers\n", TX_RING_SIZE);
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for (i = 0 ; i < TX_RING_SIZE; i++) {
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printk(" %08x: %04x %04x %08x\n",
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(uint) bdp,
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bdp->cbd_sc,
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bdp->cbd_datlen,
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bdp->cbd_bufaddr);
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bdp++;
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}
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bdp = fep->rx_bd_base;
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printk(" rx: %lu buffers\n", RX_RING_SIZE);
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for (i = 0 ; i < RX_RING_SIZE; i++) {
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printk(" %08x: %04x %04x %08x\n",
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(uint) bdp,
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bdp->cbd_sc,
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bdp->cbd_datlen,
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bdp->cbd_bufaddr);
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bdp++;
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}
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}
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#endif
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if (!fep->tx_full)
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netif_wake_queue(dev);
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}
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|
|
/* The interrupt handler.
|
|
* This is called from the MPC core interrupt.
|
|
*/
|
|
static irqreturn_t
|
|
fec_enet_interrupt(int irq, void * dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
volatile fec_t *fecp;
|
|
uint int_events;
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
struct fec_enet_private *fep = dev->priv;
|
|
__u32 regval;
|
|
|
|
if (fep->ph_regaddr) regval = *fep->ph_regaddr;
|
|
#endif
|
|
fecp = (volatile fec_t*)dev->base_addr;
|
|
|
|
/* Get the interrupt events that caused us to be here.
|
|
*/
|
|
while ((int_events = fecp->fec_ievent) != 0) {
|
|
fecp->fec_ievent = int_events;
|
|
if ((int_events & (FEC_ENET_HBERR | FEC_ENET_BABR |
|
|
FEC_ENET_BABT | FEC_ENET_EBERR)) != 0) {
|
|
printk("FEC ERROR %x\n", int_events);
|
|
}
|
|
|
|
/* Handle receive event in its own function.
|
|
*/
|
|
if (int_events & FEC_ENET_RXF) {
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
fec_enet_rx(dev, regval);
|
|
#else
|
|
fec_enet_rx(dev);
|
|
#endif
|
|
}
|
|
|
|
/* Transmit OK, or non-fatal error. Update the buffer
|
|
descriptors. FEC handles all errors, we just discover
|
|
them as part of the transmit process.
|
|
*/
|
|
if (int_events & FEC_ENET_TXF) {
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
fec_enet_tx(dev, regval);
|
|
#else
|
|
fec_enet_tx(dev);
|
|
#endif
|
|
}
|
|
|
|
if (int_events & FEC_ENET_MII) {
|
|
#ifdef CONFIG_USE_MDIO
|
|
fec_enet_mii(dev);
|
|
#else
|
|
printk("%s[%d] %s: unexpected FEC_ENET_MII event\n", __FILE__,__LINE__,__FUNCTION__);
|
|
#endif /* CONFIG_USE_MDIO */
|
|
}
|
|
|
|
}
|
|
return IRQ_RETVAL(IRQ_HANDLED);
|
|
}
|
|
|
|
|
|
static void
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
fec_enet_tx(struct net_device *dev, __u32 regval)
|
|
#else
|
|
fec_enet_tx(struct net_device *dev)
|
|
#endif
|
|
{
|
|
struct fec_enet_private *fep;
|
|
volatile cbd_t *bdp;
|
|
struct sk_buff *skb;
|
|
|
|
fep = dev->priv;
|
|
/* lock while transmitting */
|
|
spin_lock(&fep->lock);
|
|
bdp = fep->dirty_tx;
|
|
|
|
while ((bdp->cbd_sc&BD_ENET_TX_READY) == 0) {
|
|
if (bdp == fep->cur_tx && fep->tx_full == 0) break;
|
|
|
|
skb = fep->tx_skbuff[fep->skb_dirty];
|
|
/* Check for errors. */
|
|
if (bdp->cbd_sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
|
|
BD_ENET_TX_RL | BD_ENET_TX_UN |
|
|
BD_ENET_TX_CSL)) {
|
|
fep->stats.tx_errors++;
|
|
if (bdp->cbd_sc & BD_ENET_TX_HB) /* No heartbeat */
|
|
fep->stats.tx_heartbeat_errors++;
|
|
if (bdp->cbd_sc & BD_ENET_TX_LC) /* Late collision */
|
|
fep->stats.tx_window_errors++;
|
|
if (bdp->cbd_sc & BD_ENET_TX_RL) /* Retrans limit */
|
|
fep->stats.tx_aborted_errors++;
|
|
if (bdp->cbd_sc & BD_ENET_TX_UN) /* Underrun */
|
|
fep->stats.tx_fifo_errors++;
|
|
if (bdp->cbd_sc & BD_ENET_TX_CSL) /* Carrier lost */
|
|
fep->stats.tx_carrier_errors++;
|
|
} else {
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
/* Packet hook ... */
|
|
if (fep->ph_txhandler &&
|
|
((struct ethhdr *)skb->data)->h_proto
|
|
== fep->ph_proto) {
|
|
fep->ph_txhandler((__u8*)skb->data, skb->len,
|
|
regval, fep->ph_priv);
|
|
}
|
|
#endif
|
|
fep->stats.tx_packets++;
|
|
}
|
|
|
|
#ifndef final_version
|
|
if (bdp->cbd_sc & BD_ENET_TX_READY)
|
|
printk("HEY! Enet xmit interrupt and TX_READY.\n");
|
|
#endif
|
|
/* Deferred means some collisions occurred during transmit,
|
|
* but we eventually sent the packet OK.
|
|
*/
|
|
if (bdp->cbd_sc & BD_ENET_TX_DEF)
|
|
fep->stats.collisions++;
|
|
|
|
/* Free the sk buffer associated with this last transmit.
|
|
*/
|
|
#if 0
|
|
printk("TXI: %x %x %x\n", bdp, skb, fep->skb_dirty);
|
|
#endif
|
|
dev_kfree_skb_irq (skb/*, FREE_WRITE*/);
|
|
fep->tx_skbuff[fep->skb_dirty] = NULL;
|
|
fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK;
|
|
|
|
/* Update pointer to next buffer descriptor to be transmitted.
|
|
*/
|
|
if (bdp->cbd_sc & BD_ENET_TX_WRAP)
|
|
bdp = fep->tx_bd_base;
|
|
else
|
|
bdp++;
|
|
|
|
/* Since we have freed up a buffer, the ring is no longer
|
|
* full.
|
|
*/
|
|
if (fep->tx_full) {
|
|
fep->tx_full = 0;
|
|
if (netif_queue_stopped(dev))
|
|
netif_wake_queue(dev);
|
|
}
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
/* Re-read register. Not exactly guaranteed to be correct,
|
|
but... */
|
|
if (fep->ph_regaddr) regval = *fep->ph_regaddr;
|
|
#endif
|
|
}
|
|
fep->dirty_tx = (cbd_t *)bdp;
|
|
spin_unlock(&fep->lock);
|
|
}
|
|
|
|
|
|
/* During a receive, the cur_rx points to the current incoming buffer.
|
|
* When we update through the ring, if the next incoming buffer has
|
|
* not been given to the system, we just set the empty indicator,
|
|
* effectively tossing the packet.
|
|
*/
|
|
static void
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
fec_enet_rx(struct net_device *dev, __u32 regval)
|
|
#else
|
|
fec_enet_rx(struct net_device *dev)
|
|
#endif
|
|
{
|
|
struct fec_enet_private *fep;
|
|
volatile fec_t *fecp;
|
|
volatile cbd_t *bdp;
|
|
struct sk_buff *skb;
|
|
ushort pkt_len;
|
|
__u8 *data;
|
|
|
|
fep = dev->priv;
|
|
fecp = (volatile fec_t*)dev->base_addr;
|
|
|
|
/* First, grab all of the stats for the incoming packet.
|
|
* These get messed up if we get called due to a busy condition.
|
|
*/
|
|
bdp = fep->cur_rx;
|
|
|
|
while (!(bdp->cbd_sc & BD_ENET_RX_EMPTY)) {
|
|
|
|
#ifndef final_version
|
|
/* Since we have allocated space to hold a complete frame,
|
|
* the last indicator should be set.
|
|
*/
|
|
if ((bdp->cbd_sc & BD_ENET_RX_LAST) == 0)
|
|
printk("FEC ENET: rcv is not +last\n");
|
|
#endif
|
|
|
|
/* Check for errors. */
|
|
if (bdp->cbd_sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
|
|
BD_ENET_RX_CR | BD_ENET_RX_OV)) {
|
|
fep->stats.rx_errors++;
|
|
if (bdp->cbd_sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
|
|
/* Frame too long or too short. */
|
|
fep->stats.rx_length_errors++;
|
|
}
|
|
if (bdp->cbd_sc & BD_ENET_RX_NO) /* Frame alignment */
|
|
fep->stats.rx_frame_errors++;
|
|
if (bdp->cbd_sc & BD_ENET_RX_CR) /* CRC Error */
|
|
fep->stats.rx_crc_errors++;
|
|
if (bdp->cbd_sc & BD_ENET_RX_OV) /* FIFO overrun */
|
|
fep->stats.rx_crc_errors++;
|
|
}
|
|
|
|
/* Report late collisions as a frame error.
|
|
* On this error, the BD is closed, but we don't know what we
|
|
* have in the buffer. So, just drop this frame on the floor.
|
|
*/
|
|
if (bdp->cbd_sc & BD_ENET_RX_CL) {
|
|
fep->stats.rx_errors++;
|
|
fep->stats.rx_frame_errors++;
|
|
goto rx_processing_done;
|
|
}
|
|
|
|
/* Process the incoming frame.
|
|
*/
|
|
fep->stats.rx_packets++;
|
|
pkt_len = bdp->cbd_datlen;
|
|
fep->stats.rx_bytes += pkt_len;
|
|
data = fep->rx_vaddr[bdp - fep->rx_bd_base];
|
|
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
/* Packet hook ... */
|
|
if (fep->ph_rxhandler) {
|
|
if (((struct ethhdr *)data)->h_proto == fep->ph_proto) {
|
|
switch (fep->ph_rxhandler(data, pkt_len, regval,
|
|
fep->ph_priv)) {
|
|
case 1:
|
|
goto rx_processing_done;
|
|
break;
|
|
case 0:
|
|
break;
|
|
default:
|
|
fep->stats.rx_errors++;
|
|
goto rx_processing_done;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* If it wasn't filtered - copy it to an sk buffer. */
|
|
#endif
|
|
|
|
/* This does 16 byte alignment, exactly what we need.
|
|
* The packet length includes FCS, but we don't want to
|
|
* include that when passing upstream as it messes up
|
|
* bridging applications.
|
|
*/
|
|
skb = dev_alloc_skb(pkt_len-4);
|
|
|
|
if (skb == NULL) {
|
|
printk("%s: Memory squeeze, dropping packet.\n", dev->name);
|
|
fep->stats.rx_dropped++;
|
|
} else {
|
|
skb_put(skb,pkt_len-4); /* Make room */
|
|
eth_copy_and_sum(skb, data, pkt_len-4, 0);
|
|
skb->protocol=eth_type_trans(skb,dev);
|
|
netif_rx(skb);
|
|
}
|
|
rx_processing_done:
|
|
|
|
/* Clear the status flags for this buffer.
|
|
*/
|
|
bdp->cbd_sc &= ~BD_ENET_RX_STATS;
|
|
|
|
/* Mark the buffer empty.
|
|
*/
|
|
bdp->cbd_sc |= BD_ENET_RX_EMPTY;
|
|
|
|
/* Update BD pointer to next entry.
|
|
*/
|
|
if (bdp->cbd_sc & BD_ENET_RX_WRAP)
|
|
bdp = fep->rx_bd_base;
|
|
else
|
|
bdp++;
|
|
|
|
#if 1
|
|
/* Doing this here will keep the FEC running while we process
|
|
* incoming frames. On a heavily loaded network, we should be
|
|
* able to keep up at the expense of system resources.
|
|
*/
|
|
fecp->fec_r_des_active = 0x01000000;
|
|
#endif
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
/* Re-read register. Not exactly guaranteed to be correct,
|
|
but... */
|
|
if (fep->ph_regaddr) regval = *fep->ph_regaddr;
|
|
#endif
|
|
} /* while (!(bdp->cbd_sc & BD_ENET_RX_EMPTY)) */
|
|
fep->cur_rx = (cbd_t *)bdp;
|
|
|
|
#if 0
|
|
/* Doing this here will allow us to process all frames in the
|
|
* ring before the FEC is allowed to put more there. On a heavily
|
|
* loaded network, some frames may be lost. Unfortunately, this
|
|
* increases the interrupt overhead since we can potentially work
|
|
* our way back to the interrupt return only to come right back
|
|
* here.
|
|
*/
|
|
fecp->fec_r_des_active = 0x01000000;
|
|
#endif
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
static void
|
|
fec_enet_mii(struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep;
|
|
volatile fec_t *ep;
|
|
mii_list_t *mip;
|
|
uint mii_reg;
|
|
|
|
fep = (struct fec_enet_private *)dev->priv;
|
|
ep = &(((immap_t *)IMAP_ADDR)->im_cpm.cp_fec);
|
|
mii_reg = ep->fec_mii_data;
|
|
|
|
if ((mip = mii_head) == NULL) {
|
|
printk("MII and no head!\n");
|
|
return;
|
|
}
|
|
|
|
if (mip->mii_func != NULL)
|
|
(*(mip->mii_func))(mii_reg, dev);
|
|
|
|
mii_head = mip->mii_next;
|
|
mip->mii_next = mii_free;
|
|
mii_free = mip;
|
|
|
|
if ((mip = mii_head) != NULL) {
|
|
ep->fec_mii_data = mip->mii_regval;
|
|
|
|
}
|
|
}
|
|
|
|
static int
|
|
mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_device *))
|
|
{
|
|
struct fec_enet_private *fep;
|
|
unsigned long flags;
|
|
mii_list_t *mip;
|
|
int retval;
|
|
|
|
/* Add PHY address to register command.
|
|
*/
|
|
fep = dev->priv;
|
|
regval |= fep->phy_addr << 23;
|
|
|
|
retval = 0;
|
|
|
|
/* lock while modifying mii_list */
|
|
spin_lock_irqsave(&fep->lock, flags);
|
|
|
|
if ((mip = mii_free) != NULL) {
|
|
mii_free = mip->mii_next;
|
|
mip->mii_regval = regval;
|
|
mip->mii_func = func;
|
|
mip->mii_next = NULL;
|
|
if (mii_head) {
|
|
mii_tail->mii_next = mip;
|
|
mii_tail = mip;
|
|
} else {
|
|
mii_head = mii_tail = mip;
|
|
(&(((immap_t *)IMAP_ADDR)->im_cpm.cp_fec))->fec_mii_data = regval;
|
|
}
|
|
} else {
|
|
retval = 1;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&fep->lock, flags);
|
|
|
|
return(retval);
|
|
}
|
|
|
|
static void mii_do_cmd(struct net_device *dev, const phy_cmd_t *c)
|
|
{
|
|
int k;
|
|
|
|
if(!c)
|
|
return;
|
|
|
|
for(k = 0; (c+k)->mii_data != mk_mii_end; k++)
|
|
mii_queue(dev, (c+k)->mii_data, (c+k)->funct);
|
|
}
|
|
|
|
static void mii_parse_sr(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
*s &= ~(PHY_STAT_LINK | PHY_STAT_FAULT | PHY_STAT_ANC);
|
|
|
|
if (mii_reg & 0x0004)
|
|
*s |= PHY_STAT_LINK;
|
|
if (mii_reg & 0x0010)
|
|
*s |= PHY_STAT_FAULT;
|
|
if (mii_reg & 0x0020)
|
|
*s |= PHY_STAT_ANC;
|
|
|
|
fep->link = (*s & PHY_STAT_LINK) ? 1 : 0;
|
|
}
|
|
|
|
static void mii_parse_cr(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
*s &= ~(PHY_CONF_ANE | PHY_CONF_LOOP);
|
|
|
|
if (mii_reg & 0x1000)
|
|
*s |= PHY_CONF_ANE;
|
|
if (mii_reg & 0x4000)
|
|
*s |= PHY_CONF_LOOP;
|
|
}
|
|
|
|
static void mii_parse_anar(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
*s &= ~(PHY_CONF_SPMASK);
|
|
|
|
if (mii_reg & 0x0020)
|
|
*s |= PHY_CONF_10HDX;
|
|
if (mii_reg & 0x0040)
|
|
*s |= PHY_CONF_10FDX;
|
|
if (mii_reg & 0x0080)
|
|
*s |= PHY_CONF_100HDX;
|
|
if (mii_reg & 0x00100)
|
|
*s |= PHY_CONF_100FDX;
|
|
}
|
|
#if 0
|
|
static void mii_disp_reg(uint mii_reg, struct net_device *dev)
|
|
{
|
|
printk("reg %u = 0x%04x\n", (mii_reg >> 18) & 0x1f, mii_reg & 0xffff);
|
|
}
|
|
#endif
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
/* The Level one LXT970 is used by many boards */
|
|
|
|
#ifdef CONFIG_FEC_LXT970
|
|
|
|
#define MII_LXT970_MIRROR 16 /* Mirror register */
|
|
#define MII_LXT970_IER 17 /* Interrupt Enable Register */
|
|
#define MII_LXT970_ISR 18 /* Interrupt Status Register */
|
|
#define MII_LXT970_CONFIG 19 /* Configuration Register */
|
|
#define MII_LXT970_CSR 20 /* Chip Status Register */
|
|
|
|
static void mii_parse_lxt970_csr(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
*s &= ~(PHY_STAT_SPMASK);
|
|
|
|
if (mii_reg & 0x0800) {
|
|
if (mii_reg & 0x1000)
|
|
*s |= PHY_STAT_100FDX;
|
|
else
|
|
*s |= PHY_STAT_100HDX;
|
|
}
|
|
else {
|
|
if (mii_reg & 0x1000)
|
|
*s |= PHY_STAT_10FDX;
|
|
else
|
|
*s |= PHY_STAT_10HDX;
|
|
}
|
|
}
|
|
|
|
static phy_info_t phy_info_lxt970 = {
|
|
0x07810000,
|
|
"LXT970",
|
|
|
|
(const phy_cmd_t []) { /* config */
|
|
#if 0
|
|
// { mk_mii_write(MII_REG_ANAR, 0x0021), NULL },
|
|
|
|
/* Set default operation of 100-TX....for some reason
|
|
* some of these bits are set on power up, which is wrong.
|
|
*/
|
|
{ mk_mii_write(MII_LXT970_CONFIG, 0), NULL },
|
|
#endif
|
|
{ mk_mii_read(MII_REG_CR), mii_parse_cr },
|
|
{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* startup - enable interrupts */
|
|
{ mk_mii_write(MII_LXT970_IER, 0x0002), NULL },
|
|
{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* ack_int */
|
|
/* read SR and ISR to acknowledge */
|
|
|
|
{ mk_mii_read(MII_REG_SR), mii_parse_sr },
|
|
{ mk_mii_read(MII_LXT970_ISR), NULL },
|
|
|
|
/* find out the current status */
|
|
|
|
{ mk_mii_read(MII_LXT970_CSR), mii_parse_lxt970_csr },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* shutdown - disable interrupts */
|
|
{ mk_mii_write(MII_LXT970_IER, 0x0000), NULL },
|
|
{ mk_mii_end, }
|
|
},
|
|
};
|
|
|
|
#endif /* CONFIG_FEC_LXT970 */
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
/* The Level one LXT971 is used on some of my custom boards */
|
|
|
|
#ifdef CONFIG_FEC_LXT971
|
|
|
|
/* register definitions for the 971 */
|
|
|
|
#define MII_LXT971_PCR 16 /* Port Control Register */
|
|
#define MII_LXT971_SR2 17 /* Status Register 2 */
|
|
#define MII_LXT971_IER 18 /* Interrupt Enable Register */
|
|
#define MII_LXT971_ISR 19 /* Interrupt Status Register */
|
|
#define MII_LXT971_LCR 20 /* LED Control Register */
|
|
#define MII_LXT971_TCR 30 /* Transmit Control Register */
|
|
|
|
/*
|
|
* I had some nice ideas of running the MDIO faster...
|
|
* The 971 should support 8MHz and I tried it, but things acted really
|
|
* weird, so 2.5 MHz ought to be enough for anyone...
|
|
*/
|
|
|
|
static void mii_parse_lxt971_sr2(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
*s &= ~(PHY_STAT_SPMASK);
|
|
|
|
if (mii_reg & 0x4000) {
|
|
if (mii_reg & 0x0200)
|
|
*s |= PHY_STAT_100FDX;
|
|
else
|
|
*s |= PHY_STAT_100HDX;
|
|
}
|
|
else {
|
|
if (mii_reg & 0x0200)
|
|
*s |= PHY_STAT_10FDX;
|
|
else
|
|
*s |= PHY_STAT_10HDX;
|
|
}
|
|
if (mii_reg & 0x0008)
|
|
*s |= PHY_STAT_FAULT;
|
|
}
|
|
|
|
static phy_info_t phy_info_lxt971 = {
|
|
0x0001378e,
|
|
"LXT971",
|
|
|
|
(const phy_cmd_t []) { /* config */
|
|
// { mk_mii_write(MII_REG_ANAR, 0x021), NULL }, /* 10 Mbps, HD */
|
|
{ mk_mii_read(MII_REG_CR), mii_parse_cr },
|
|
{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* startup - enable interrupts */
|
|
{ mk_mii_write(MII_LXT971_IER, 0x00f2), NULL },
|
|
{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
|
|
|
|
/* Somehow does the 971 tell me that the link is down
|
|
* the first read after power-up.
|
|
* read here to get a valid value in ack_int */
|
|
|
|
{ mk_mii_read(MII_REG_SR), mii_parse_sr },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* ack_int */
|
|
/* find out the current status */
|
|
|
|
{ mk_mii_read(MII_REG_SR), mii_parse_sr },
|
|
{ mk_mii_read(MII_LXT971_SR2), mii_parse_lxt971_sr2 },
|
|
|
|
/* we only need to read ISR to acknowledge */
|
|
|
|
{ mk_mii_read(MII_LXT971_ISR), NULL },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* shutdown - disable interrupts */
|
|
{ mk_mii_write(MII_LXT971_IER, 0x0000), NULL },
|
|
{ mk_mii_end, }
|
|
},
|
|
};
|
|
|
|
#endif /* CONFIG_FEC_LXT970 */
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
/* The Quality Semiconductor QS6612 is used on the RPX CLLF */
|
|
|
|
#ifdef CONFIG_FEC_QS6612
|
|
|
|
/* register definitions */
|
|
|
|
#define MII_QS6612_MCR 17 /* Mode Control Register */
|
|
#define MII_QS6612_FTR 27 /* Factory Test Register */
|
|
#define MII_QS6612_MCO 28 /* Misc. Control Register */
|
|
#define MII_QS6612_ISR 29 /* Interrupt Source Register */
|
|
#define MII_QS6612_IMR 30 /* Interrupt Mask Register */
|
|
#define MII_QS6612_PCR 31 /* 100BaseTx PHY Control Reg. */
|
|
|
|
static void mii_parse_qs6612_pcr(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
*s &= ~(PHY_STAT_SPMASK);
|
|
|
|
switch((mii_reg >> 2) & 7) {
|
|
case 1: *s |= PHY_STAT_10HDX; break;
|
|
case 2: *s |= PHY_STAT_100HDX; break;
|
|
case 5: *s |= PHY_STAT_10FDX; break;
|
|
case 6: *s |= PHY_STAT_100FDX; break;
|
|
}
|
|
}
|
|
|
|
static phy_info_t phy_info_qs6612 = {
|
|
0x00181440,
|
|
"QS6612",
|
|
|
|
(const phy_cmd_t []) { /* config */
|
|
// { mk_mii_write(MII_REG_ANAR, 0x061), NULL }, /* 10 Mbps */
|
|
|
|
/* The PHY powers up isolated on the RPX,
|
|
* so send a command to allow operation.
|
|
*/
|
|
|
|
{ mk_mii_write(MII_QS6612_PCR, 0x0dc0), NULL },
|
|
|
|
/* parse cr and anar to get some info */
|
|
|
|
{ mk_mii_read(MII_REG_CR), mii_parse_cr },
|
|
{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* startup - enable interrupts */
|
|
{ mk_mii_write(MII_QS6612_IMR, 0x003a), NULL },
|
|
{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* ack_int */
|
|
|
|
/* we need to read ISR, SR and ANER to acknowledge */
|
|
|
|
{ mk_mii_read(MII_QS6612_ISR), NULL },
|
|
{ mk_mii_read(MII_REG_SR), mii_parse_sr },
|
|
{ mk_mii_read(MII_REG_ANER), NULL },
|
|
|
|
/* read pcr to get info */
|
|
|
|
{ mk_mii_read(MII_QS6612_PCR), mii_parse_qs6612_pcr },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* shutdown - disable interrupts */
|
|
{ mk_mii_write(MII_QS6612_IMR, 0x0000), NULL },
|
|
{ mk_mii_end, }
|
|
},
|
|
};
|
|
|
|
#endif /* CONFIG_FEC_QS6612 */
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
/* The Advanced Micro Devices AM79C874 is used on the ICU862 */
|
|
|
|
#ifdef CONFIG_FEC_AM79C874
|
|
|
|
/* register definitions for the 79C874 */
|
|
|
|
#define MII_AM79C874_MFR 16 /* Miscellaneous Features Register */
|
|
#define MII_AM79C874_ICSR 17 /* Interrupt Control/Status Register */
|
|
#define MII_AM79C874_DR 18 /* Diagnostic Register */
|
|
#define MII_AM79C874_PMLR 19 /* Power Management & Loopback Register */
|
|
#define MII_AM79C874_MCR 21 /* Mode Control Register */
|
|
#define MII_AM79C874_DC 23 /* Disconnect Counter */
|
|
#define MII_AM79C874_REC 24 /* Receiver Error Counter */
|
|
|
|
static void mii_parse_amd79c874_dr(uint mii_reg, struct net_device *dev, uint data)
|
|
{
|
|
volatile struct fec_enet_private *fep = dev->priv;
|
|
uint s = fep->phy_status;
|
|
|
|
s &= ~(PHY_STAT_SPMASK);
|
|
|
|
/* Register 18: Bit 10 is data rate, 11 is Duplex */
|
|
switch ((mii_reg >> 10) & 3) {
|
|
case 0: s |= PHY_STAT_10HDX; break;
|
|
case 1: s |= PHY_STAT_100HDX; break;
|
|
case 2: s |= PHY_STAT_10FDX; break;
|
|
case 3: s |= PHY_STAT_100FDX; break;
|
|
}
|
|
|
|
fep->phy_status = s;
|
|
}
|
|
|
|
static phy_info_t phy_info_amd79c874 = {
|
|
0x00022561,
|
|
"AM79C874",
|
|
|
|
(const phy_cmd_t []) { /* config */
|
|
// { mk_mii_write(MII_REG_ANAR, 0x021), NULL }, /* 10 Mbps, HD */
|
|
{ mk_mii_read(MII_REG_CR), mii_parse_cr },
|
|
{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* startup - enable interrupts */
|
|
{ mk_mii_write(MII_AM79C874_ICSR, 0xff00), NULL },
|
|
{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* ack_int */
|
|
/* find out the current status */
|
|
|
|
{ mk_mii_read(MII_REG_SR), mii_parse_sr },
|
|
{ mk_mii_read(MII_AM79C874_DR), mii_parse_amd79c874_dr },
|
|
|
|
/* we only need to read ICSR to acknowledge */
|
|
|
|
{ mk_mii_read(MII_AM79C874_ICSR), NULL },
|
|
{ mk_mii_end, }
|
|
},
|
|
(const phy_cmd_t []) { /* shutdown - disable interrupts */
|
|
{ mk_mii_write(MII_AM79C874_ICSR, 0x0000), NULL },
|
|
{ mk_mii_end, }
|
|
},
|
|
};
|
|
|
|
#endif /* CONFIG_FEC_AM79C874 */
|
|
|
|
static phy_info_t *phy_info[] = {
|
|
|
|
#ifdef CONFIG_FEC_LXT970
|
|
&phy_info_lxt970,
|
|
#endif /* CONFIG_FEC_LXT970 */
|
|
|
|
#ifdef CONFIG_FEC_LXT971
|
|
&phy_info_lxt971,
|
|
#endif /* CONFIG_FEC_LXT971 */
|
|
|
|
#ifdef CONFIG_FEC_QS6612
|
|
&phy_info_qs6612,
|
|
#endif /* CONFIG_FEC_QS6612 */
|
|
|
|
#ifdef CONFIG_FEC_AM79C874
|
|
&phy_info_amd79c874,
|
|
#endif /* CONFIG_FEC_AM79C874 */
|
|
|
|
NULL
|
|
};
|
|
|
|
static void mii_display_status(struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
if (!fep->link && !fep->old_link) {
|
|
/* Link is still down - don't print anything */
|
|
return;
|
|
}
|
|
|
|
printk("%s: status: ", dev->name);
|
|
|
|
if (!fep->link) {
|
|
printk("link down");
|
|
} else {
|
|
printk("link up");
|
|
|
|
switch(*s & PHY_STAT_SPMASK) {
|
|
case PHY_STAT_100FDX: printk(", 100 Mbps Full Duplex"); break;
|
|
case PHY_STAT_100HDX: printk(", 100 Mbps Half Duplex"); break;
|
|
case PHY_STAT_10FDX: printk(", 10 Mbps Full Duplex"); break;
|
|
case PHY_STAT_10HDX: printk(", 10 Mbps Half Duplex"); break;
|
|
default:
|
|
printk(", Unknown speed/duplex");
|
|
}
|
|
|
|
if (*s & PHY_STAT_ANC)
|
|
printk(", auto-negotiation complete");
|
|
}
|
|
|
|
if (*s & PHY_STAT_FAULT)
|
|
printk(", remote fault");
|
|
|
|
printk(".\n");
|
|
}
|
|
|
|
static void mii_display_config(struct work_struct *work)
|
|
{
|
|
struct fec_enet_private *fep =
|
|
container_of(work, struct fec_enet_private, phy_task);
|
|
struct net_device *dev = fep->dev;
|
|
volatile uint *s = &(fep->phy_status);
|
|
|
|
printk("%s: config: auto-negotiation ", dev->name);
|
|
|
|
if (*s & PHY_CONF_ANE)
|
|
printk("on");
|
|
else
|
|
printk("off");
|
|
|
|
if (*s & PHY_CONF_100FDX)
|
|
printk(", 100FDX");
|
|
if (*s & PHY_CONF_100HDX)
|
|
printk(", 100HDX");
|
|
if (*s & PHY_CONF_10FDX)
|
|
printk(", 10FDX");
|
|
if (*s & PHY_CONF_10HDX)
|
|
printk(", 10HDX");
|
|
if (!(*s & PHY_CONF_SPMASK))
|
|
printk(", No speed/duplex selected?");
|
|
|
|
if (*s & PHY_CONF_LOOP)
|
|
printk(", loopback enabled");
|
|
|
|
printk(".\n");
|
|
|
|
fep->sequence_done = 1;
|
|
}
|
|
|
|
static void mii_relink(struct work_struct *work)
|
|
{
|
|
struct fec_enet_private *fep =
|
|
container_of(work, struct fec_enet_private, phy_task);
|
|
struct net_device *dev = fep->dev;
|
|
int duplex;
|
|
|
|
fep->link = (fep->phy_status & PHY_STAT_LINK) ? 1 : 0;
|
|
mii_display_status(dev);
|
|
fep->old_link = fep->link;
|
|
|
|
if (fep->link) {
|
|
duplex = 0;
|
|
if (fep->phy_status
|
|
& (PHY_STAT_100FDX | PHY_STAT_10FDX))
|
|
duplex = 1;
|
|
fec_restart(dev, duplex);
|
|
}
|
|
else
|
|
fec_stop(dev);
|
|
|
|
#if 0
|
|
enable_irq(fep->mii_irq);
|
|
#endif
|
|
|
|
}
|
|
|
|
static void mii_queue_relink(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
|
|
fep->dev = dev;
|
|
INIT_WORK(&fep->phy_task, mii_relink);
|
|
schedule_work(&fep->phy_task);
|
|
}
|
|
|
|
static void mii_queue_config(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
|
|
fep->dev = dev;
|
|
INIT_WORK(&fep->phy_task, mii_display_config);
|
|
schedule_work(&fep->phy_task);
|
|
}
|
|
|
|
|
|
|
|
phy_cmd_t phy_cmd_relink[] = { { mk_mii_read(MII_REG_CR), mii_queue_relink },
|
|
{ mk_mii_end, } };
|
|
phy_cmd_t phy_cmd_config[] = { { mk_mii_read(MII_REG_CR), mii_queue_config },
|
|
{ mk_mii_end, } };
|
|
|
|
|
|
|
|
/* Read remainder of PHY ID.
|
|
*/
|
|
static void
|
|
mii_discover_phy3(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep;
|
|
int i;
|
|
|
|
fep = dev->priv;
|
|
fep->phy_id |= (mii_reg & 0xffff);
|
|
|
|
for(i = 0; phy_info[i]; i++)
|
|
if(phy_info[i]->id == (fep->phy_id >> 4))
|
|
break;
|
|
|
|
if(!phy_info[i])
|
|
panic("%s: PHY id 0x%08x is not supported!\n",
|
|
dev->name, fep->phy_id);
|
|
|
|
fep->phy = phy_info[i];
|
|
fep->phy_id_done = 1;
|
|
|
|
printk("%s: Phy @ 0x%x, type %s (0x%08x)\n",
|
|
dev->name, fep->phy_addr, fep->phy->name, fep->phy_id);
|
|
}
|
|
|
|
/* Scan all of the MII PHY addresses looking for someone to respond
|
|
* with a valid ID. This usually happens quickly.
|
|
*/
|
|
static void
|
|
mii_discover_phy(uint mii_reg, struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep;
|
|
uint phytype;
|
|
|
|
fep = dev->priv;
|
|
|
|
if ((phytype = (mii_reg & 0xffff)) != 0xffff) {
|
|
|
|
/* Got first part of ID, now get remainder.
|
|
*/
|
|
fep->phy_id = phytype << 16;
|
|
mii_queue(dev, mk_mii_read(MII_REG_PHYIR2), mii_discover_phy3);
|
|
} else {
|
|
fep->phy_addr++;
|
|
if (fep->phy_addr < 32) {
|
|
mii_queue(dev, mk_mii_read(MII_REG_PHYIR1),
|
|
mii_discover_phy);
|
|
} else {
|
|
printk("fec: No PHY device found.\n");
|
|
}
|
|
}
|
|
}
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
/* This interrupt occurs when the PHY detects a link change.
|
|
*/
|
|
static
|
|
#ifdef CONFIG_RPXCLASSIC
|
|
void mii_link_interrupt(void *dev_id)
|
|
#else
|
|
irqreturn_t mii_link_interrupt(int irq, void * dev_id)
|
|
#endif
|
|
{
|
|
#ifdef CONFIG_USE_MDIO
|
|
struct net_device *dev = dev_id;
|
|
struct fec_enet_private *fep = dev->priv;
|
|
volatile immap_t *immap = (immap_t *)IMAP_ADDR;
|
|
volatile fec_t *fecp = &(immap->im_cpm.cp_fec);
|
|
unsigned int ecntrl = fecp->fec_ecntrl;
|
|
|
|
/* We need the FEC enabled to access the MII
|
|
*/
|
|
if ((ecntrl & FEC_ECNTRL_ETHER_EN) == 0) {
|
|
fecp->fec_ecntrl |= FEC_ECNTRL_ETHER_EN;
|
|
}
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
#if 0
|
|
disable_irq(fep->mii_irq); /* disable now, enable later */
|
|
#endif
|
|
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
mii_do_cmd(dev, fep->phy->ack_int);
|
|
mii_do_cmd(dev, phy_cmd_relink); /* restart and display status */
|
|
|
|
if ((ecntrl & FEC_ECNTRL_ETHER_EN) == 0) {
|
|
fecp->fec_ecntrl = ecntrl; /* restore old settings */
|
|
}
|
|
#else
|
|
printk("%s[%d] %s: unexpected Link interrupt\n", __FILE__,__LINE__,__FUNCTION__);
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
#ifndef CONFIG_RPXCLASSIC
|
|
return IRQ_RETVAL(IRQ_HANDLED);
|
|
#endif /* CONFIG_RPXCLASSIC */
|
|
}
|
|
|
|
static int
|
|
fec_enet_open(struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = dev->priv;
|
|
|
|
/* I should reset the ring buffers here, but I don't yet know
|
|
* a simple way to do that.
|
|
*/
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
fep->sequence_done = 0;
|
|
fep->link = 0;
|
|
|
|
if (fep->phy) {
|
|
mii_do_cmd(dev, fep->phy->ack_int);
|
|
mii_do_cmd(dev, fep->phy->config);
|
|
mii_do_cmd(dev, phy_cmd_config); /* display configuration */
|
|
while(!fep->sequence_done)
|
|
schedule();
|
|
|
|
mii_do_cmd(dev, fep->phy->startup);
|
|
netif_start_queue(dev);
|
|
return 0; /* Success */
|
|
}
|
|
return -ENODEV; /* No PHY we understand */
|
|
#else
|
|
fep->link = 1;
|
|
netif_start_queue(dev);
|
|
return 0; /* Success */
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
}
|
|
|
|
static int
|
|
fec_enet_close(struct net_device *dev)
|
|
{
|
|
/* Don't know what to do yet.
|
|
*/
|
|
netif_stop_queue(dev);
|
|
fec_stop(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *fec_enet_get_stats(struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep = (struct fec_enet_private *)dev->priv;
|
|
|
|
return &fep->stats;
|
|
}
|
|
|
|
/* Set or clear the multicast filter for this adaptor.
|
|
* Skeleton taken from sunlance driver.
|
|
* The CPM Ethernet implementation allows Multicast as well as individual
|
|
* MAC address filtering. Some of the drivers check to make sure it is
|
|
* a group multicast address, and discard those that are not. I guess I
|
|
* will do the same for now, but just remove the test if you want
|
|
* individual filtering as well (do the upper net layers want or support
|
|
* this kind of feature?).
|
|
*/
|
|
|
|
static void set_multicast_list(struct net_device *dev)
|
|
{
|
|
struct fec_enet_private *fep;
|
|
volatile fec_t *ep;
|
|
|
|
fep = (struct fec_enet_private *)dev->priv;
|
|
ep = &(((immap_t *)IMAP_ADDR)->im_cpm.cp_fec);
|
|
|
|
if (dev->flags&IFF_PROMISC) {
|
|
|
|
/* Log any net taps. */
|
|
printk("%s: Promiscuous mode enabled.\n", dev->name);
|
|
ep->fec_r_cntrl |= FEC_RCNTRL_PROM;
|
|
} else {
|
|
|
|
ep->fec_r_cntrl &= ~FEC_RCNTRL_PROM;
|
|
|
|
if (dev->flags & IFF_ALLMULTI) {
|
|
/* Catch all multicast addresses, so set the
|
|
* filter to all 1's.
|
|
*/
|
|
ep->fec_hash_table_high = 0xffffffff;
|
|
ep->fec_hash_table_low = 0xffffffff;
|
|
}
|
|
#if 0
|
|
else {
|
|
/* Clear filter and add the addresses in the list.
|
|
*/
|
|
ep->sen_gaddr1 = 0;
|
|
ep->sen_gaddr2 = 0;
|
|
ep->sen_gaddr3 = 0;
|
|
ep->sen_gaddr4 = 0;
|
|
|
|
dmi = dev->mc_list;
|
|
|
|
for (i=0; i<dev->mc_count; i++) {
|
|
|
|
/* Only support group multicast for now.
|
|
*/
|
|
if (!(dmi->dmi_addr[0] & 1))
|
|
continue;
|
|
|
|
/* The address in dmi_addr is LSB first,
|
|
* and taddr is MSB first. We have to
|
|
* copy bytes MSB first from dmi_addr.
|
|
*/
|
|
mcptr = (u_char *)dmi->dmi_addr + 5;
|
|
tdptr = (u_char *)&ep->sen_taddrh;
|
|
for (j=0; j<6; j++)
|
|
*tdptr++ = *mcptr--;
|
|
|
|
/* Ask CPM to run CRC and set bit in
|
|
* filter mask.
|
|
*/
|
|
cpmp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SCC1, CPM_CR_SET_GADDR) | CPM_CR_FLG;
|
|
/* this delay is necessary here -- Cort */
|
|
udelay(10);
|
|
while (cpmp->cp_cpcr & CPM_CR_FLG);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Initialize the FEC Ethernet on 860T.
|
|
*/
|
|
static int __init fec_enet_init(void)
|
|
{
|
|
struct net_device *dev;
|
|
struct fec_enet_private *fep;
|
|
int i, j, k, err;
|
|
unsigned char *eap, *iap, *ba;
|
|
dma_addr_t mem_addr;
|
|
volatile cbd_t *bdp;
|
|
cbd_t *cbd_base;
|
|
volatile immap_t *immap;
|
|
volatile fec_t *fecp;
|
|
bd_t *bd;
|
|
#ifdef CONFIG_SCC_ENET
|
|
unsigned char tmpaddr[6];
|
|
#endif
|
|
|
|
immap = (immap_t *)IMAP_ADDR; /* pointer to internal registers */
|
|
|
|
bd = (bd_t *)__res;
|
|
|
|
dev = alloc_etherdev(sizeof(*fep));
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
fep = dev->priv;
|
|
|
|
fecp = &(immap->im_cpm.cp_fec);
|
|
|
|
/* Whack a reset. We should wait for this.
|
|
*/
|
|
fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET;
|
|
for (i = 0;
|
|
(fecp->fec_ecntrl & FEC_ECNTRL_RESET) && (i < FEC_RESET_DELAY);
|
|
++i) {
|
|
udelay(1);
|
|
}
|
|
if (i == FEC_RESET_DELAY) {
|
|
printk ("FEC Reset timeout!\n");
|
|
}
|
|
|
|
/* Set the Ethernet address. If using multiple Enets on the 8xx,
|
|
* this needs some work to get unique addresses.
|
|
*/
|
|
eap = (unsigned char *)my_enet_addr;
|
|
iap = bd->bi_enetaddr;
|
|
|
|
#ifdef CONFIG_SCC_ENET
|
|
/*
|
|
* If a board has Ethernet configured both on a SCC and the
|
|
* FEC, it needs (at least) 2 MAC addresses (we know that Sun
|
|
* disagrees, but anyway). For the FEC port, we create
|
|
* another address by setting one of the address bits above
|
|
* something that would have (up to now) been allocated.
|
|
*/
|
|
for (i=0; i<6; i++)
|
|
tmpaddr[i] = *iap++;
|
|
tmpaddr[3] |= 0x80;
|
|
iap = tmpaddr;
|
|
#endif
|
|
|
|
for (i=0; i<6; i++) {
|
|
dev->dev_addr[i] = *eap++ = *iap++;
|
|
}
|
|
|
|
/* Allocate memory for buffer descriptors.
|
|
*/
|
|
if (((RX_RING_SIZE + TX_RING_SIZE) * sizeof(cbd_t)) > PAGE_SIZE) {
|
|
printk("FEC init error. Need more space.\n");
|
|
printk("FEC initialization failed.\n");
|
|
return 1;
|
|
}
|
|
cbd_base = (cbd_t *)dma_alloc_coherent(dev->class_dev.dev, PAGE_SIZE,
|
|
&mem_addr, GFP_KERNEL);
|
|
|
|
/* Set receive and transmit descriptor base.
|
|
*/
|
|
fep->rx_bd_base = cbd_base;
|
|
fep->tx_bd_base = cbd_base + RX_RING_SIZE;
|
|
|
|
fep->skb_cur = fep->skb_dirty = 0;
|
|
|
|
/* Initialize the receive buffer descriptors.
|
|
*/
|
|
bdp = fep->rx_bd_base;
|
|
k = 0;
|
|
for (i=0; i<FEC_ENET_RX_PAGES; i++) {
|
|
|
|
/* Allocate a page.
|
|
*/
|
|
ba = (unsigned char *)dma_alloc_coherent(dev->class_dev.dev,
|
|
PAGE_SIZE,
|
|
&mem_addr,
|
|
GFP_KERNEL);
|
|
/* BUG: no check for failure */
|
|
|
|
/* Initialize the BD for every fragment in the page.
|
|
*/
|
|
for (j=0; j<FEC_ENET_RX_FRPPG; j++) {
|
|
bdp->cbd_sc = BD_ENET_RX_EMPTY;
|
|
bdp->cbd_bufaddr = mem_addr;
|
|
fep->rx_vaddr[k++] = ba;
|
|
mem_addr += FEC_ENET_RX_FRSIZE;
|
|
ba += FEC_ENET_RX_FRSIZE;
|
|
bdp++;
|
|
}
|
|
}
|
|
|
|
/* Set the last buffer to wrap.
|
|
*/
|
|
bdp--;
|
|
bdp->cbd_sc |= BD_SC_WRAP;
|
|
|
|
#ifdef CONFIG_FEC_PACKETHOOK
|
|
fep->ph_lock = 0;
|
|
fep->ph_rxhandler = fep->ph_txhandler = NULL;
|
|
fep->ph_proto = 0;
|
|
fep->ph_regaddr = NULL;
|
|
fep->ph_priv = NULL;
|
|
#endif
|
|
|
|
/* Install our interrupt handler.
|
|
*/
|
|
if (request_irq(FEC_INTERRUPT, fec_enet_interrupt, 0, "fec", dev) != 0)
|
|
panic("Could not allocate FEC IRQ!");
|
|
|
|
#ifdef CONFIG_RPXCLASSIC
|
|
/* Make Port C, bit 15 an input that causes interrupts.
|
|
*/
|
|
immap->im_ioport.iop_pcpar &= ~0x0001;
|
|
immap->im_ioport.iop_pcdir &= ~0x0001;
|
|
immap->im_ioport.iop_pcso &= ~0x0001;
|
|
immap->im_ioport.iop_pcint |= 0x0001;
|
|
cpm_install_handler(CPMVEC_PIO_PC15, mii_link_interrupt, dev);
|
|
|
|
/* Make LEDS reflect Link status.
|
|
*/
|
|
*((uint *) RPX_CSR_ADDR) &= ~BCSR2_FETHLEDMODE;
|
|
#endif
|
|
|
|
#ifdef PHY_INTERRUPT
|
|
((immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel |=
|
|
(0x80000000 >> PHY_INTERRUPT);
|
|
|
|
if (request_irq(PHY_INTERRUPT, mii_link_interrupt, 0, "mii", dev) != 0)
|
|
panic("Could not allocate MII IRQ!");
|
|
#endif
|
|
|
|
dev->base_addr = (unsigned long)fecp;
|
|
|
|
/* The FEC Ethernet specific entries in the device structure. */
|
|
dev->open = fec_enet_open;
|
|
dev->hard_start_xmit = fec_enet_start_xmit;
|
|
dev->tx_timeout = fec_timeout;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
dev->stop = fec_enet_close;
|
|
dev->get_stats = fec_enet_get_stats;
|
|
dev->set_multicast_list = set_multicast_list;
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
for (i=0; i<NMII-1; i++)
|
|
mii_cmds[i].mii_next = &mii_cmds[i+1];
|
|
mii_free = mii_cmds;
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
/* Configure all of port D for MII.
|
|
*/
|
|
immap->im_ioport.iop_pdpar = 0x1fff;
|
|
|
|
/* Bits moved from Rev. D onward.
|
|
*/
|
|
if ((mfspr(SPRN_IMMR) & 0xffff) < 0x0501)
|
|
immap->im_ioport.iop_pddir = 0x1c58; /* Pre rev. D */
|
|
else
|
|
immap->im_ioport.iop_pddir = 0x1fff; /* Rev. D and later */
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
/* Set MII speed to 2.5 MHz
|
|
*/
|
|
fecp->fec_mii_speed = fep->phy_speed =
|
|
(( (bd->bi_intfreq + 500000) / 2500000 / 2 ) & 0x3F ) << 1;
|
|
#else
|
|
fecp->fec_mii_speed = 0; /* turn off MDIO */
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
err = register_netdev(dev);
|
|
if (err) {
|
|
free_netdev(dev);
|
|
return err;
|
|
}
|
|
|
|
printk ("%s: FEC ENET Version 0.2, FEC irq %d"
|
|
#ifdef PHY_INTERRUPT
|
|
", MII irq %d"
|
|
#endif
|
|
", addr ",
|
|
dev->name, FEC_INTERRUPT
|
|
#ifdef PHY_INTERRUPT
|
|
, PHY_INTERRUPT
|
|
#endif
|
|
);
|
|
for (i=0; i<6; i++)
|
|
printk("%02x%c", dev->dev_addr[i], (i==5) ? '\n' : ':');
|
|
|
|
#ifdef CONFIG_USE_MDIO /* start in full duplex mode, and negotiate speed */
|
|
fec_restart (dev, 1);
|
|
#else /* always use half duplex mode only */
|
|
fec_restart (dev, 0);
|
|
#endif
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
/* Queue up command to detect the PHY and initialize the
|
|
* remainder of the interface.
|
|
*/
|
|
fep->phy_id_done = 0;
|
|
fep->phy_addr = 0;
|
|
mii_queue(dev, mk_mii_read(MII_REG_PHYIR1), mii_discover_phy);
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
return 0;
|
|
}
|
|
module_init(fec_enet_init);
|
|
|
|
/* This function is called to start or restart the FEC during a link
|
|
* change. This only happens when switching between half and full
|
|
* duplex.
|
|
*/
|
|
static void
|
|
fec_restart(struct net_device *dev, int duplex)
|
|
{
|
|
struct fec_enet_private *fep;
|
|
int i;
|
|
volatile cbd_t *bdp;
|
|
volatile immap_t *immap;
|
|
volatile fec_t *fecp;
|
|
|
|
immap = (immap_t *)IMAP_ADDR; /* pointer to internal registers */
|
|
|
|
fecp = &(immap->im_cpm.cp_fec);
|
|
|
|
fep = dev->priv;
|
|
|
|
/* Whack a reset. We should wait for this.
|
|
*/
|
|
fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET;
|
|
for (i = 0;
|
|
(fecp->fec_ecntrl & FEC_ECNTRL_RESET) && (i < FEC_RESET_DELAY);
|
|
++i) {
|
|
udelay(1);
|
|
}
|
|
if (i == FEC_RESET_DELAY) {
|
|
printk ("FEC Reset timeout!\n");
|
|
}
|
|
|
|
/* Set station address.
|
|
*/
|
|
fecp->fec_addr_low = (my_enet_addr[0] << 16) | my_enet_addr[1];
|
|
fecp->fec_addr_high = my_enet_addr[2];
|
|
|
|
/* Reset all multicast.
|
|
*/
|
|
fecp->fec_hash_table_high = 0;
|
|
fecp->fec_hash_table_low = 0;
|
|
|
|
/* Set maximum receive buffer size.
|
|
*/
|
|
fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
|
|
fecp->fec_r_hash = PKT_MAXBUF_SIZE;
|
|
|
|
/* Set receive and transmit descriptor base.
|
|
*/
|
|
fecp->fec_r_des_start = iopa((uint)(fep->rx_bd_base));
|
|
fecp->fec_x_des_start = iopa((uint)(fep->tx_bd_base));
|
|
|
|
fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
|
|
fep->cur_rx = fep->rx_bd_base;
|
|
|
|
/* Reset SKB transmit buffers.
|
|
*/
|
|
fep->skb_cur = fep->skb_dirty = 0;
|
|
for (i=0; i<=TX_RING_MOD_MASK; i++) {
|
|
if (fep->tx_skbuff[i] != NULL) {
|
|
dev_kfree_skb(fep->tx_skbuff[i]);
|
|
fep->tx_skbuff[i] = NULL;
|
|
}
|
|
}
|
|
|
|
/* Initialize the receive buffer descriptors.
|
|
*/
|
|
bdp = fep->rx_bd_base;
|
|
for (i=0; i<RX_RING_SIZE; i++) {
|
|
|
|
/* Initialize the BD for every fragment in the page.
|
|
*/
|
|
bdp->cbd_sc = BD_ENET_RX_EMPTY;
|
|
bdp++;
|
|
}
|
|
|
|
/* Set the last buffer to wrap.
|
|
*/
|
|
bdp--;
|
|
bdp->cbd_sc |= BD_SC_WRAP;
|
|
|
|
/* ...and the same for transmit.
|
|
*/
|
|
bdp = fep->tx_bd_base;
|
|
for (i=0; i<TX_RING_SIZE; i++) {
|
|
|
|
/* Initialize the BD for every fragment in the page.
|
|
*/
|
|
bdp->cbd_sc = 0;
|
|
bdp->cbd_bufaddr = 0;
|
|
bdp++;
|
|
}
|
|
|
|
/* Set the last buffer to wrap.
|
|
*/
|
|
bdp--;
|
|
bdp->cbd_sc |= BD_SC_WRAP;
|
|
|
|
/* Enable MII mode.
|
|
*/
|
|
if (duplex) {
|
|
fecp->fec_r_cntrl = FEC_RCNTRL_MII_MODE; /* MII enable */
|
|
fecp->fec_x_cntrl = FEC_TCNTRL_FDEN; /* FD enable */
|
|
}
|
|
else {
|
|
fecp->fec_r_cntrl = FEC_RCNTRL_MII_MODE | FEC_RCNTRL_DRT;
|
|
fecp->fec_x_cntrl = 0;
|
|
}
|
|
fep->full_duplex = duplex;
|
|
|
|
/* Enable big endian and don't care about SDMA FC.
|
|
*/
|
|
fecp->fec_fun_code = 0x78000000;
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
/* Set MII speed.
|
|
*/
|
|
fecp->fec_mii_speed = fep->phy_speed;
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
/* Clear any outstanding interrupt.
|
|
*/
|
|
fecp->fec_ievent = 0xffc0;
|
|
|
|
fecp->fec_ivec = (FEC_INTERRUPT/2) << 29;
|
|
|
|
/* Enable interrupts we wish to service.
|
|
*/
|
|
fecp->fec_imask = ( FEC_ENET_TXF | FEC_ENET_TXB |
|
|
FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_MII );
|
|
|
|
/* And last, enable the transmit and receive processing.
|
|
*/
|
|
fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN;
|
|
fecp->fec_r_des_active = 0x01000000;
|
|
}
|
|
|
|
static void
|
|
fec_stop(struct net_device *dev)
|
|
{
|
|
volatile immap_t *immap;
|
|
volatile fec_t *fecp;
|
|
struct fec_enet_private *fep;
|
|
int i;
|
|
|
|
immap = (immap_t *)IMAP_ADDR; /* pointer to internal registers */
|
|
|
|
fecp = &(immap->im_cpm.cp_fec);
|
|
|
|
if ((fecp->fec_ecntrl & FEC_ECNTRL_ETHER_EN) == 0)
|
|
return; /* already down */
|
|
|
|
fep = dev->priv;
|
|
|
|
|
|
fecp->fec_x_cntrl = 0x01; /* Graceful transmit stop */
|
|
|
|
for (i = 0;
|
|
((fecp->fec_ievent & 0x10000000) == 0) && (i < FEC_RESET_DELAY);
|
|
++i) {
|
|
udelay(1);
|
|
}
|
|
if (i == FEC_RESET_DELAY) {
|
|
printk ("FEC timeout on graceful transmit stop\n");
|
|
}
|
|
|
|
/* Clear outstanding MII command interrupts.
|
|
*/
|
|
fecp->fec_ievent = FEC_ENET_MII;
|
|
|
|
/* Enable MII command finished interrupt
|
|
*/
|
|
fecp->fec_ivec = (FEC_INTERRUPT/2) << 29;
|
|
fecp->fec_imask = FEC_ENET_MII;
|
|
|
|
#ifdef CONFIG_USE_MDIO
|
|
/* Set MII speed.
|
|
*/
|
|
fecp->fec_mii_speed = fep->phy_speed;
|
|
#endif /* CONFIG_USE_MDIO */
|
|
|
|
/* Disable FEC
|
|
*/
|
|
fecp->fec_ecntrl &= ~(FEC_ECNTRL_ETHER_EN);
|
|
}
|