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28 KiB
1234 lines
28 KiB
/*
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* dm9000.c: Version 1.2 03/18/2003
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*
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* A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
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* Copyright (C) 1997 Sten Wang
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
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*
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* V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
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* 06/22/2001 Support DM9801 progrmming
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* E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
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* E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
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* R17 = (R17 & 0xfff0) | NF + 3
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* E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
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* R17 = (R17 & 0xfff0) | NF
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*
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* v1.00 modify by simon 2001.9.5
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* change for kernel 2.4.x
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*
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* v1.1 11/09/2001 fix force mode bug
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*
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* v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
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* Fixed phy reset.
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* Added tx/rx 32 bit mode.
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* Cleaned up for kernel merge.
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*
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* 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de>
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* Port to 2.6 kernel
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*
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* 24-Sep-2004 Ben Dooks <ben@simtec.co.uk>
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* Cleanup of code to remove ifdefs
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* Allowed platform device data to influence access width
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* Reformatting areas of code
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*
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* 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de>
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* * removed 2.4 style module parameters
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* * removed removed unused stat counter and fixed
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* net_device_stats
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* * introduced tx_timeout function
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* * reworked locking
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*
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* 01-Jul-2005 Ben Dooks <ben@simtec.co.uk>
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* * fixed spinlock call without pointer
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* * ensure spinlock is initialised
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*/
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/crc32.h>
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#include <linux/mii.h>
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#include <linux/dm9000.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <asm/delay.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include "dm9000.h"
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/* Board/System/Debug information/definition ---------------- */
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#define DM9000_PHY 0x40 /* PHY address 0x01 */
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#define CARDNAME "dm9000"
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#define PFX CARDNAME ": "
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#define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
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#define DM9000_DEBUG 0
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#if DM9000_DEBUG > 2
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#define PRINTK3(args...) printk(CARDNAME ": " args)
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#else
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#define PRINTK3(args...) do { } while(0)
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#endif
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#if DM9000_DEBUG > 1
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#define PRINTK2(args...) printk(CARDNAME ": " args)
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#else
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#define PRINTK2(args...) do { } while(0)
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#endif
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#if DM9000_DEBUG > 0
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#define PRINTK1(args...) printk(CARDNAME ": " args)
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#define PRINTK(args...) printk(CARDNAME ": " args)
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#else
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#define PRINTK1(args...) do { } while(0)
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#define PRINTK(args...) printk(KERN_DEBUG args)
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#endif
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#ifdef CONFIG_BLACKFIN
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#define readsb insb
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#define readsw insw
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#define readsl insl
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#define writesb outsb
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#define writesw outsw
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#define writesl outsl
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#define DM9000_IRQ_FLAGS (IRQF_SHARED | IRQF_TRIGGER_HIGH)
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#else
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#define DM9000_IRQ_FLAGS IRQF_SHARED
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#endif
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/*
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* Transmit timeout, default 5 seconds.
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*/
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static int watchdog = 5000;
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module_param(watchdog, int, 0400);
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MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
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/* Structure/enum declaration ------------------------------- */
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typedef struct board_info {
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void __iomem *io_addr; /* Register I/O base address */
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void __iomem *io_data; /* Data I/O address */
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u16 irq; /* IRQ */
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u16 tx_pkt_cnt;
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u16 queue_pkt_len;
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u16 queue_start_addr;
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u16 dbug_cnt;
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u8 io_mode; /* 0:word, 2:byte */
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u8 phy_addr;
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void (*inblk)(void __iomem *port, void *data, int length);
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void (*outblk)(void __iomem *port, void *data, int length);
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void (*dumpblk)(void __iomem *port, int length);
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struct resource *addr_res; /* resources found */
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struct resource *data_res;
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struct resource *addr_req; /* resources requested */
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struct resource *data_req;
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struct resource *irq_res;
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struct timer_list timer;
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struct net_device_stats stats;
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unsigned char srom[128];
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spinlock_t lock;
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struct mii_if_info mii;
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u32 msg_enable;
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} board_info_t;
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/* function declaration ------------------------------------- */
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static int dm9000_probe(struct platform_device *);
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static int dm9000_open(struct net_device *);
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static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
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static int dm9000_stop(struct net_device *);
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static void dm9000_timer(unsigned long);
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static void dm9000_init_dm9000(struct net_device *);
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static struct net_device_stats *dm9000_get_stats(struct net_device *);
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static irqreturn_t dm9000_interrupt(int, void *);
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static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
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static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
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int value);
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static u16 read_srom_word(board_info_t *, int);
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static void dm9000_rx(struct net_device *);
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static void dm9000_hash_table(struct net_device *);
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//#define DM9000_PROGRAM_EEPROM
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#ifdef DM9000_PROGRAM_EEPROM
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static void program_eeprom(board_info_t * db);
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#endif
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/* DM9000 network board routine ---------------------------- */
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static void
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dm9000_reset(board_info_t * db)
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{
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PRINTK1("dm9000x: resetting\n");
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/* RESET device */
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writeb(DM9000_NCR, db->io_addr);
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udelay(200);
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writeb(NCR_RST, db->io_data);
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udelay(200);
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}
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/*
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* Read a byte from I/O port
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*/
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static u8
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ior(board_info_t * db, int reg)
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{
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writeb(reg, db->io_addr);
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return readb(db->io_data);
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}
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/*
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* Write a byte to I/O port
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*/
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static void
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iow(board_info_t * db, int reg, int value)
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{
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writeb(reg, db->io_addr);
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writeb(value, db->io_data);
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}
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/* routines for sending block to chip */
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static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
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{
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writesb(reg, data, count);
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}
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static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
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{
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writesw(reg, data, (count+1) >> 1);
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}
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static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
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{
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writesl(reg, data, (count+3) >> 2);
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}
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/* input block from chip to memory */
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static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
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{
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readsb(reg, data, count);
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}
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static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
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{
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readsw(reg, data, (count+1) >> 1);
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}
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static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
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{
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readsl(reg, data, (count+3) >> 2);
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}
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/* dump block from chip to null */
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static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
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{
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int i;
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int tmp;
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for (i = 0; i < count; i++)
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tmp = readb(reg);
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}
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static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
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{
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int i;
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int tmp;
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count = (count + 1) >> 1;
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for (i = 0; i < count; i++)
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tmp = readw(reg);
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}
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static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
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{
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int i;
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int tmp;
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count = (count + 3) >> 2;
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for (i = 0; i < count; i++)
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tmp = readl(reg);
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}
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/* dm9000_set_io
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*
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* select the specified set of io routines to use with the
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* device
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*/
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static void dm9000_set_io(struct board_info *db, int byte_width)
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{
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/* use the size of the data resource to work out what IO
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* routines we want to use
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*/
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switch (byte_width) {
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case 1:
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db->dumpblk = dm9000_dumpblk_8bit;
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db->outblk = dm9000_outblk_8bit;
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db->inblk = dm9000_inblk_8bit;
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break;
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case 2:
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db->dumpblk = dm9000_dumpblk_16bit;
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db->outblk = dm9000_outblk_16bit;
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db->inblk = dm9000_inblk_16bit;
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break;
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case 3:
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printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
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db->dumpblk = dm9000_dumpblk_16bit;
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db->outblk = dm9000_outblk_16bit;
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db->inblk = dm9000_inblk_16bit;
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break;
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case 4:
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default:
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db->dumpblk = dm9000_dumpblk_32bit;
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db->outblk = dm9000_outblk_32bit;
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db->inblk = dm9000_inblk_32bit;
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break;
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}
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}
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/* Our watchdog timed out. Called by the networking layer */
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static void dm9000_timeout(struct net_device *dev)
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{
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board_info_t *db = (board_info_t *) dev->priv;
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u8 reg_save;
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unsigned long flags;
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/* Save previous register address */
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reg_save = readb(db->io_addr);
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spin_lock_irqsave(&db->lock,flags);
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netif_stop_queue(dev);
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dm9000_reset(db);
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dm9000_init_dm9000(dev);
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/* We can accept TX packets again */
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dev->trans_start = jiffies;
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netif_wake_queue(dev);
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/* Restore previous register address */
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writeb(reg_save, db->io_addr);
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spin_unlock_irqrestore(&db->lock,flags);
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}
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#ifdef CONFIG_NET_POLL_CONTROLLER
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/*
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*Used by netconsole
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*/
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static void dm9000_poll_controller(struct net_device *dev)
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{
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disable_irq(dev->irq);
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dm9000_interrupt(dev->irq,dev);
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enable_irq(dev->irq);
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}
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#endif
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/* dm9000_release_board
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*
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* release a board, and any mapped resources
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*/
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static void
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dm9000_release_board(struct platform_device *pdev, struct board_info *db)
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{
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if (db->data_res == NULL) {
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if (db->addr_res != NULL)
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release_mem_region((unsigned long)db->io_addr, 4);
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return;
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}
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/* unmap our resources */
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iounmap(db->io_addr);
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iounmap(db->io_data);
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/* release the resources */
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if (db->data_req != NULL) {
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release_resource(db->data_req);
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kfree(db->data_req);
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}
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if (db->addr_req != NULL) {
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release_resource(db->addr_req);
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kfree(db->addr_req);
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}
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}
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#define res_size(_r) (((_r)->end - (_r)->start) + 1)
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/*
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* Search DM9000 board, allocate space and register it
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*/
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static int
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dm9000_probe(struct platform_device *pdev)
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{
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struct dm9000_plat_data *pdata = pdev->dev.platform_data;
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struct board_info *db; /* Point a board information structure */
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struct net_device *ndev;
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unsigned long base;
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int ret = 0;
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int iosize;
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int i;
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u32 id_val;
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/* Init network device */
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ndev = alloc_etherdev(sizeof (struct board_info));
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if (!ndev) {
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printk("%s: could not allocate device.\n", CARDNAME);
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return -ENOMEM;
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}
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SET_MODULE_OWNER(ndev);
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SET_NETDEV_DEV(ndev, &pdev->dev);
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PRINTK2("dm9000_probe()");
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/* setup board info structure */
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db = (struct board_info *) ndev->priv;
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memset(db, 0, sizeof (*db));
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spin_lock_init(&db->lock);
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if (pdev->num_resources < 2) {
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ret = -ENODEV;
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goto out;
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} else if (pdev->num_resources == 2) {
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base = pdev->resource[0].start;
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if (!request_mem_region(base, 4, ndev->name)) {
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ret = -EBUSY;
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goto out;
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}
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ndev->base_addr = base;
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ndev->irq = pdev->resource[1].start;
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db->io_addr = (void __iomem *)base;
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db->io_data = (void __iomem *)(base + 4);
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/* ensure at least we have a default set of IO routines */
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dm9000_set_io(db, 2);
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} else {
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db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (db->addr_res == NULL || db->data_res == NULL ||
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db->irq_res == NULL) {
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printk(KERN_ERR PFX "insufficient resources\n");
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ret = -ENOENT;
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goto out;
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}
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i = res_size(db->addr_res);
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db->addr_req = request_mem_region(db->addr_res->start, i,
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pdev->name);
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if (db->addr_req == NULL) {
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printk(KERN_ERR PFX "cannot claim address reg area\n");
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ret = -EIO;
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goto out;
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}
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db->io_addr = ioremap(db->addr_res->start, i);
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if (db->io_addr == NULL) {
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printk(KERN_ERR "failed to ioremap address reg\n");
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ret = -EINVAL;
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goto out;
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}
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iosize = res_size(db->data_res);
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db->data_req = request_mem_region(db->data_res->start, iosize,
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pdev->name);
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if (db->data_req == NULL) {
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printk(KERN_ERR PFX "cannot claim data reg area\n");
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ret = -EIO;
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goto out;
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}
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db->io_data = ioremap(db->data_res->start, iosize);
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if (db->io_data == NULL) {
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printk(KERN_ERR "failed to ioremap data reg\n");
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ret = -EINVAL;
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goto out;
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}
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/* fill in parameters for net-dev structure */
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ndev->base_addr = (unsigned long)db->io_addr;
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ndev->irq = db->irq_res->start;
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/* ensure at least we have a default set of IO routines */
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dm9000_set_io(db, iosize);
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}
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/* check to see if anything is being over-ridden */
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if (pdata != NULL) {
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/* check to see if the driver wants to over-ride the
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* default IO width */
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if (pdata->flags & DM9000_PLATF_8BITONLY)
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dm9000_set_io(db, 1);
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if (pdata->flags & DM9000_PLATF_16BITONLY)
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dm9000_set_io(db, 2);
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if (pdata->flags & DM9000_PLATF_32BITONLY)
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dm9000_set_io(db, 4);
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/* check to see if there are any IO routine
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* over-rides */
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if (pdata->inblk != NULL)
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db->inblk = pdata->inblk;
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if (pdata->outblk != NULL)
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db->outblk = pdata->outblk;
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if (pdata->dumpblk != NULL)
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db->dumpblk = pdata->dumpblk;
|
|
}
|
|
|
|
dm9000_reset(db);
|
|
|
|
/* try two times, DM9000 sometimes gets the first read wrong */
|
|
for (i = 0; i < 2; i++) {
|
|
id_val = ior(db, DM9000_VIDL);
|
|
id_val |= (u32)ior(db, DM9000_VIDH) << 8;
|
|
id_val |= (u32)ior(db, DM9000_PIDL) << 16;
|
|
id_val |= (u32)ior(db, DM9000_PIDH) << 24;
|
|
|
|
if (id_val == DM9000_ID)
|
|
break;
|
|
printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
|
|
}
|
|
|
|
if (id_val != DM9000_ID) {
|
|
printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
|
|
goto release;
|
|
}
|
|
|
|
/* from this point we assume that we have found a DM9000 */
|
|
|
|
/* driver system function */
|
|
ether_setup(ndev);
|
|
|
|
ndev->open = &dm9000_open;
|
|
ndev->hard_start_xmit = &dm9000_start_xmit;
|
|
ndev->tx_timeout = &dm9000_timeout;
|
|
ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
|
|
ndev->stop = &dm9000_stop;
|
|
ndev->get_stats = &dm9000_get_stats;
|
|
ndev->set_multicast_list = &dm9000_hash_table;
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
ndev->poll_controller = &dm9000_poll_controller;
|
|
#endif
|
|
|
|
#ifdef DM9000_PROGRAM_EEPROM
|
|
program_eeprom(db);
|
|
#endif
|
|
db->msg_enable = NETIF_MSG_LINK;
|
|
db->mii.phy_id_mask = 0x1f;
|
|
db->mii.reg_num_mask = 0x1f;
|
|
db->mii.force_media = 0;
|
|
db->mii.full_duplex = 0;
|
|
db->mii.dev = ndev;
|
|
db->mii.mdio_read = dm9000_phy_read;
|
|
db->mii.mdio_write = dm9000_phy_write;
|
|
|
|
/* Read SROM content */
|
|
for (i = 0; i < 64; i++)
|
|
((u16 *) db->srom)[i] = read_srom_word(db, i);
|
|
|
|
/* Set Node Address */
|
|
for (i = 0; i < 6; i++)
|
|
ndev->dev_addr[i] = db->srom[i];
|
|
|
|
if (!is_valid_ether_addr(ndev->dev_addr)) {
|
|
/* try reading from mac */
|
|
|
|
for (i = 0; i < 6; i++)
|
|
ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
|
|
}
|
|
|
|
if (!is_valid_ether_addr(ndev->dev_addr))
|
|
printk("%s: Invalid ethernet MAC address. Please "
|
|
"set using ifconfig\n", ndev->name);
|
|
|
|
platform_set_drvdata(pdev, ndev);
|
|
ret = register_netdev(ndev);
|
|
|
|
if (ret == 0) {
|
|
printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
|
|
ndev->name, db->io_addr, db->io_data, ndev->irq);
|
|
for (i = 0; i < 5; i++)
|
|
printk("%02x:", ndev->dev_addr[i]);
|
|
printk("%02x\n", ndev->dev_addr[5]);
|
|
}
|
|
return 0;
|
|
|
|
release:
|
|
out:
|
|
printk("%s: not found (%d).\n", CARDNAME, ret);
|
|
|
|
dm9000_release_board(pdev, db);
|
|
free_netdev(ndev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Open the interface.
|
|
* The interface is opened whenever "ifconfig" actives it.
|
|
*/
|
|
static int
|
|
dm9000_open(struct net_device *dev)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
|
|
PRINTK2("entering dm9000_open\n");
|
|
|
|
if (request_irq(dev->irq, &dm9000_interrupt, DM9000_IRQ_FLAGS, dev->name, dev))
|
|
return -EAGAIN;
|
|
|
|
/* Initialize DM9000 board */
|
|
dm9000_reset(db);
|
|
dm9000_init_dm9000(dev);
|
|
|
|
/* Init driver variable */
|
|
db->dbug_cnt = 0;
|
|
|
|
/* set and active a timer process */
|
|
init_timer(&db->timer);
|
|
db->timer.expires = DM9000_TIMER_WUT;
|
|
db->timer.data = (unsigned long) dev;
|
|
db->timer.function = &dm9000_timer;
|
|
add_timer(&db->timer);
|
|
|
|
mii_check_media(&db->mii, netif_msg_link(db), 1);
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initilize dm9000 board
|
|
*/
|
|
static void
|
|
dm9000_init_dm9000(struct net_device *dev)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
|
|
PRINTK1("entering %s\n",__FUNCTION__);
|
|
|
|
/* I/O mode */
|
|
db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
|
|
|
|
/* GPIO0 on pre-activate PHY */
|
|
iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
|
|
iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
|
|
iow(db, DM9000_GPR, 0); /* Enable PHY */
|
|
|
|
/* Program operating register */
|
|
iow(db, DM9000_TCR, 0); /* TX Polling clear */
|
|
iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
|
|
iow(db, DM9000_FCR, 0xff); /* Flow Control */
|
|
iow(db, DM9000_SMCR, 0); /* Special Mode */
|
|
/* clear TX status */
|
|
iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
|
|
iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
|
|
|
|
/* Set address filter table */
|
|
dm9000_hash_table(dev);
|
|
|
|
/* Activate DM9000 */
|
|
iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
|
|
/* Enable TX/RX interrupt mask */
|
|
iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
|
|
|
|
/* Init Driver variable */
|
|
db->tx_pkt_cnt = 0;
|
|
db->queue_pkt_len = 0;
|
|
dev->trans_start = 0;
|
|
}
|
|
|
|
/*
|
|
* Hardware start transmission.
|
|
* Send a packet to media from the upper layer.
|
|
*/
|
|
static int
|
|
dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
unsigned long flags;
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
|
|
PRINTK3("dm9000_start_xmit\n");
|
|
|
|
if (db->tx_pkt_cnt > 1)
|
|
return 1;
|
|
|
|
spin_lock_irqsave(&db->lock, flags);
|
|
|
|
/* Move data to DM9000 TX RAM */
|
|
writeb(DM9000_MWCMD, db->io_addr);
|
|
|
|
(db->outblk)(db->io_data, skb->data, skb->len);
|
|
db->stats.tx_bytes += skb->len;
|
|
|
|
db->tx_pkt_cnt++;
|
|
/* TX control: First packet immediately send, second packet queue */
|
|
if (db->tx_pkt_cnt == 1) {
|
|
/* Set TX length to DM9000 */
|
|
iow(db, DM9000_TXPLL, skb->len & 0xff);
|
|
iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
|
|
|
|
/* Issue TX polling command */
|
|
iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
|
|
|
|
dev->trans_start = jiffies; /* save the time stamp */
|
|
} else {
|
|
/* Second packet */
|
|
db->queue_pkt_len = skb->len;
|
|
netif_stop_queue(dev);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&db->lock, flags);
|
|
|
|
/* free this SKB */
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
dm9000_shutdown(struct net_device *dev)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
|
|
/* RESET device */
|
|
dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
|
|
iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
|
|
iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
|
|
iow(db, DM9000_RCR, 0x00); /* Disable RX */
|
|
}
|
|
|
|
/*
|
|
* Stop the interface.
|
|
* The interface is stopped when it is brought.
|
|
*/
|
|
static int
|
|
dm9000_stop(struct net_device *ndev)
|
|
{
|
|
board_info_t *db = (board_info_t *) ndev->priv;
|
|
|
|
PRINTK1("entering %s\n",__FUNCTION__);
|
|
|
|
/* deleted timer */
|
|
del_timer(&db->timer);
|
|
|
|
netif_stop_queue(ndev);
|
|
netif_carrier_off(ndev);
|
|
|
|
/* free interrupt */
|
|
free_irq(ndev->irq, ndev);
|
|
|
|
dm9000_shutdown(ndev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* DM9000 interrupt handler
|
|
* receive the packet to upper layer, free the transmitted packet
|
|
*/
|
|
|
|
static void
|
|
dm9000_tx_done(struct net_device *dev, board_info_t * db)
|
|
{
|
|
int tx_status = ior(db, DM9000_NSR); /* Got TX status */
|
|
|
|
if (tx_status & (NSR_TX2END | NSR_TX1END)) {
|
|
/* One packet sent complete */
|
|
db->tx_pkt_cnt--;
|
|
db->stats.tx_packets++;
|
|
|
|
/* Queue packet check & send */
|
|
if (db->tx_pkt_cnt > 0) {
|
|
iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
|
|
iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
|
|
iow(db, DM9000_TCR, TCR_TXREQ);
|
|
dev->trans_start = jiffies;
|
|
}
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t
|
|
dm9000_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
board_info_t *db;
|
|
int int_status;
|
|
u8 reg_save;
|
|
|
|
PRINTK3("entering %s\n",__FUNCTION__);
|
|
|
|
if (!dev) {
|
|
PRINTK1("dm9000_interrupt() without DEVICE arg\n");
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* A real interrupt coming */
|
|
db = (board_info_t *) dev->priv;
|
|
spin_lock(&db->lock);
|
|
|
|
/* Save previous register address */
|
|
reg_save = readb(db->io_addr);
|
|
|
|
/* Disable all interrupts */
|
|
iow(db, DM9000_IMR, IMR_PAR);
|
|
|
|
/* Got DM9000 interrupt status */
|
|
int_status = ior(db, DM9000_ISR); /* Got ISR */
|
|
iow(db, DM9000_ISR, int_status); /* Clear ISR status */
|
|
|
|
/* Received the coming packet */
|
|
if (int_status & ISR_PRS)
|
|
dm9000_rx(dev);
|
|
|
|
/* Trnasmit Interrupt check */
|
|
if (int_status & ISR_PTS)
|
|
dm9000_tx_done(dev, db);
|
|
|
|
/* Re-enable interrupt mask */
|
|
iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
|
|
|
|
/* Restore previous register address */
|
|
writeb(reg_save, db->io_addr);
|
|
|
|
spin_unlock(&db->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* Get statistics from driver.
|
|
*/
|
|
static struct net_device_stats *
|
|
dm9000_get_stats(struct net_device *dev)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
return &db->stats;
|
|
}
|
|
|
|
|
|
/*
|
|
* A periodic timer routine
|
|
* Dynamic media sense, allocated Rx buffer...
|
|
*/
|
|
static void
|
|
dm9000_timer(unsigned long data)
|
|
{
|
|
struct net_device *dev = (struct net_device *) data;
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
|
|
PRINTK3("dm9000_timer()\n");
|
|
|
|
mii_check_media(&db->mii, netif_msg_link(db), 0);
|
|
|
|
/* Set timer again */
|
|
db->timer.expires = DM9000_TIMER_WUT;
|
|
add_timer(&db->timer);
|
|
}
|
|
|
|
struct dm9000_rxhdr {
|
|
u16 RxStatus;
|
|
u16 RxLen;
|
|
} __attribute__((__packed__));
|
|
|
|
/*
|
|
* Received a packet and pass to upper layer
|
|
*/
|
|
static void
|
|
dm9000_rx(struct net_device *dev)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
struct dm9000_rxhdr rxhdr;
|
|
struct sk_buff *skb;
|
|
u8 rxbyte, *rdptr;
|
|
bool GoodPacket;
|
|
int RxLen;
|
|
|
|
/* Check packet ready or not */
|
|
do {
|
|
ior(db, DM9000_MRCMDX); /* Dummy read */
|
|
|
|
/* Get most updated data */
|
|
rxbyte = readb(db->io_data);
|
|
|
|
/* Status check: this byte must be 0 or 1 */
|
|
if (rxbyte > DM9000_PKT_RDY) {
|
|
printk("status check failed: %d\n", rxbyte);
|
|
iow(db, DM9000_RCR, 0x00); /* Stop Device */
|
|
iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
|
|
return;
|
|
}
|
|
|
|
if (rxbyte != DM9000_PKT_RDY)
|
|
return;
|
|
|
|
/* A packet ready now & Get status/length */
|
|
GoodPacket = true;
|
|
writeb(DM9000_MRCMD, db->io_addr);
|
|
|
|
(db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
|
|
|
|
RxLen = rxhdr.RxLen;
|
|
|
|
/* Packet Status check */
|
|
if (RxLen < 0x40) {
|
|
GoodPacket = false;
|
|
PRINTK1("Bad Packet received (runt)\n");
|
|
}
|
|
|
|
if (RxLen > DM9000_PKT_MAX) {
|
|
PRINTK1("RST: RX Len:%x\n", RxLen);
|
|
}
|
|
|
|
if (rxhdr.RxStatus & 0xbf00) {
|
|
GoodPacket = false;
|
|
if (rxhdr.RxStatus & 0x100) {
|
|
PRINTK1("fifo error\n");
|
|
db->stats.rx_fifo_errors++;
|
|
}
|
|
if (rxhdr.RxStatus & 0x200) {
|
|
PRINTK1("crc error\n");
|
|
db->stats.rx_crc_errors++;
|
|
}
|
|
if (rxhdr.RxStatus & 0x8000) {
|
|
PRINTK1("length error\n");
|
|
db->stats.rx_length_errors++;
|
|
}
|
|
}
|
|
|
|
/* Move data from DM9000 */
|
|
if (GoodPacket
|
|
&& ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
|
|
skb_reserve(skb, 2);
|
|
rdptr = (u8 *) skb_put(skb, RxLen - 4);
|
|
|
|
/* Read received packet from RX SRAM */
|
|
|
|
(db->inblk)(db->io_data, rdptr, RxLen);
|
|
db->stats.rx_bytes += RxLen;
|
|
|
|
/* Pass to upper layer */
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
netif_rx(skb);
|
|
db->stats.rx_packets++;
|
|
|
|
} else {
|
|
/* need to dump the packet's data */
|
|
|
|
(db->dumpblk)(db->io_data, RxLen);
|
|
}
|
|
} while (rxbyte == DM9000_PKT_RDY);
|
|
}
|
|
|
|
/*
|
|
* Read a word data from SROM
|
|
*/
|
|
static u16
|
|
read_srom_word(board_info_t * db, int offset)
|
|
{
|
|
iow(db, DM9000_EPAR, offset);
|
|
iow(db, DM9000_EPCR, EPCR_ERPRR);
|
|
mdelay(8); /* according to the datasheet 200us should be enough,
|
|
but it doesn't work */
|
|
iow(db, DM9000_EPCR, 0x0);
|
|
return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
|
|
}
|
|
|
|
#ifdef DM9000_PROGRAM_EEPROM
|
|
/*
|
|
* Write a word data to SROM
|
|
*/
|
|
static void
|
|
write_srom_word(board_info_t * db, int offset, u16 val)
|
|
{
|
|
iow(db, DM9000_EPAR, offset);
|
|
iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
|
|
iow(db, DM9000_EPDRL, (val & 0xff));
|
|
iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
|
|
mdelay(8); /* same shit */
|
|
iow(db, DM9000_EPCR, 0);
|
|
}
|
|
|
|
/*
|
|
* Only for development:
|
|
* Here we write static data to the eeprom in case
|
|
* we don't have valid content on a new board
|
|
*/
|
|
static void
|
|
program_eeprom(board_info_t * db)
|
|
{
|
|
u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
|
|
0x0000, /* Autoload: accept nothing */
|
|
0x0a46, 0x9000, /* Vendor / Product ID */
|
|
0x0000, /* pin control */
|
|
0x0000,
|
|
}; /* Wake-up mode control */
|
|
int i;
|
|
for (i = 0; i < 8; i++)
|
|
write_srom_word(db, i, eeprom[i]);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Calculate the CRC valude of the Rx packet
|
|
* flag = 1 : return the reverse CRC (for the received packet CRC)
|
|
* 0 : return the normal CRC (for Hash Table index)
|
|
*/
|
|
|
|
static unsigned long
|
|
cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
|
|
{
|
|
|
|
u32 crc = ether_crc_le(Len, Data);
|
|
|
|
if (flag)
|
|
return ~crc;
|
|
|
|
return crc;
|
|
}
|
|
|
|
/*
|
|
* Set DM9000 multicast address
|
|
*/
|
|
static void
|
|
dm9000_hash_table(struct net_device *dev)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
struct dev_mc_list *mcptr = dev->mc_list;
|
|
int mc_cnt = dev->mc_count;
|
|
u32 hash_val;
|
|
u16 i, oft, hash_table[4];
|
|
unsigned long flags;
|
|
|
|
PRINTK2("dm9000_hash_table()\n");
|
|
|
|
spin_lock_irqsave(&db->lock,flags);
|
|
|
|
for (i = 0, oft = 0x10; i < 6; i++, oft++)
|
|
iow(db, oft, dev->dev_addr[i]);
|
|
|
|
/* Clear Hash Table */
|
|
for (i = 0; i < 4; i++)
|
|
hash_table[i] = 0x0;
|
|
|
|
/* broadcast address */
|
|
hash_table[3] = 0x8000;
|
|
|
|
/* the multicast address in Hash Table : 64 bits */
|
|
for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
|
|
hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
|
|
hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
|
|
}
|
|
|
|
/* Write the hash table to MAC MD table */
|
|
for (i = 0, oft = 0x16; i < 4; i++) {
|
|
iow(db, oft++, hash_table[i] & 0xff);
|
|
iow(db, oft++, (hash_table[i] >> 8) & 0xff);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&db->lock,flags);
|
|
}
|
|
|
|
|
|
/*
|
|
* Read a word from phyxcer
|
|
*/
|
|
static int
|
|
dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
unsigned long flags;
|
|
unsigned int reg_save;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&db->lock,flags);
|
|
|
|
/* Save previous register address */
|
|
reg_save = readb(db->io_addr);
|
|
|
|
/* Fill the phyxcer register into REG_0C */
|
|
iow(db, DM9000_EPAR, DM9000_PHY | reg);
|
|
|
|
iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
|
|
udelay(100); /* Wait read complete */
|
|
iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
|
|
|
|
/* The read data keeps on REG_0D & REG_0E */
|
|
ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
|
|
|
|
/* restore the previous address */
|
|
writeb(reg_save, db->io_addr);
|
|
|
|
spin_unlock_irqrestore(&db->lock,flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Write a word to phyxcer
|
|
*/
|
|
static void
|
|
dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
|
|
{
|
|
board_info_t *db = (board_info_t *) dev->priv;
|
|
unsigned long flags;
|
|
unsigned long reg_save;
|
|
|
|
spin_lock_irqsave(&db->lock,flags);
|
|
|
|
/* Save previous register address */
|
|
reg_save = readb(db->io_addr);
|
|
|
|
/* Fill the phyxcer register into REG_0C */
|
|
iow(db, DM9000_EPAR, DM9000_PHY | reg);
|
|
|
|
/* Fill the written data into REG_0D & REG_0E */
|
|
iow(db, DM9000_EPDRL, (value & 0xff));
|
|
iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
|
|
|
|
iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
|
|
udelay(500); /* Wait write complete */
|
|
iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
|
|
|
|
/* restore the previous address */
|
|
writeb(reg_save, db->io_addr);
|
|
|
|
spin_unlock_irqrestore(&db->lock,flags);
|
|
}
|
|
|
|
static int
|
|
dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(dev);
|
|
|
|
if (ndev) {
|
|
if (netif_running(ndev)) {
|
|
netif_device_detach(ndev);
|
|
dm9000_shutdown(ndev);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
dm9000_drv_resume(struct platform_device *dev)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(dev);
|
|
board_info_t *db = (board_info_t *) ndev->priv;
|
|
|
|
if (ndev) {
|
|
|
|
if (netif_running(ndev)) {
|
|
dm9000_reset(db);
|
|
dm9000_init_dm9000(ndev);
|
|
|
|
netif_device_attach(ndev);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
dm9000_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(pdev);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
unregister_netdev(ndev);
|
|
dm9000_release_board(pdev, (board_info_t *) ndev->priv);
|
|
free_netdev(ndev); /* free device structure */
|
|
|
|
PRINTK1("clean_module() exit\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver dm9000_driver = {
|
|
.driver = {
|
|
.name = "dm9000",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = dm9000_probe,
|
|
.remove = dm9000_drv_remove,
|
|
.suspend = dm9000_drv_suspend,
|
|
.resume = dm9000_drv_resume,
|
|
};
|
|
|
|
static int __init
|
|
dm9000_init(void)
|
|
{
|
|
printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
|
|
|
|
return platform_driver_register(&dm9000_driver); /* search board and register */
|
|
}
|
|
|
|
static void __exit
|
|
dm9000_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&dm9000_driver);
|
|
}
|
|
|
|
module_init(dm9000_init);
|
|
module_exit(dm9000_cleanup);
|
|
|
|
MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
|
|
MODULE_DESCRIPTION("Davicom DM9000 network driver");
|
|
MODULE_LICENSE("GPL");
|
|
|