dmfe.c

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/*
    A Davicom DM9102/DM9102A/DM9102A+DM9801/DM9102A+DM9802 NIC fast
    ethernet driver for Linux.
    Copyright (C) 1997  Sten Wang

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    DAVICOM Web-Site: www.davicom.com.tw

    Author: Sten Wang, 886-3-5798797-8517, E-mail: [e-mail]
    Maintainer: Tobias Ringstrom <[e-mail]>

    (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.

    Marcelo Tosatti <[e-mail]> :
    Made it compile in 2.3 (device to net_device)

    Alan Cox <[e-mail]> :
    Cleaned up for kernel merge.
    Removed the back compatibility support
    Reformatted, fixing spelling etc as I went
    Removed IRQ 0-15 assumption

    Jeff Garzik <[e-mail]> :
    Updated to use new PCI driver API.
    Resource usage cleanups.
    Report driver version to user.

    Tobias Ringstrom <[e-mail]> :
    Cleaned up and added SMP safety.  Thanks go to Jeff Garzik,
    Andrew Morton and Frank Davis for the SMP safety fixes.

    Vojtech Pavlik <[e-mail]> :
    Cleaned up pointer arithmetics.
    Fixed a lot of 64bit issues.
    Cleaned up printk()s a bit.
    Fixed some obvious big endian problems.

    Tobias Ringstrom <[e-mail]> :
    Use time_after for jiffies calculation.  Added ethtool
    support.  Updated PCI resource allocation.  Do not
    forget to unmap PCI mapped skbs.

    Alan Cox <[e-mail]>
    Added new PCI identifiers provided by Clear Zhang at ALi
    for their 1563 ethernet device.

    TODO

    Check on 64 bit boxes.
    Check and fix on big endian boxes.

    Test and make sure PCI latency is now correct for all cases.
*/

#define DRV_NAME	"dmfe"
#define DRV_VERSION	"1.36.4"
#define DRV_RELDATE	"2002-01-17"

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/crc32.h>
#include <linux/bitops.h>

#include <asm/processor.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
#include <asm/irq.h>


/* Board/System/Debug information/definition ---------------- */
#define PCI_DM9132_ID   0x91321282      /* Davicom DM9132 ID */
#define PCI_DM9102_ID   0x91021282      /* Davicom DM9102 ID */
#define PCI_DM9100_ID   0x91001282      /* Davicom DM9100 ID */
#define PCI_DM9009_ID   0x90091282      /* Davicom DM9009 ID */

#define DM9102_IO_SIZE  0x80
#define DM9102A_IO_SIZE 0x100
#define TX_MAX_SEND_CNT 0x1             /* Maximum tx packet per time */
#define TX_DESC_CNT     0x10            /* Allocated Tx descriptors */
#define RX_DESC_CNT     0x20            /* Allocated Rx descriptors */
#define TX_FREE_DESC_CNT (TX_DESC_CNT - 2)	/* Max TX packet count */
#define TX_WAKE_DESC_CNT (TX_DESC_CNT - 3)	/* TX wakeup count */
#define DESC_ALL_CNT    (TX_DESC_CNT + RX_DESC_CNT)
#define TX_BUF_ALLOC    0x600
#define RX_ALLOC_SIZE   0x620
#define DM910X_RESET    1
#define CR0_DEFAULT     0x00E00000      /* TX & RX burst mode */
#define CR6_DEFAULT     0x00080000      /* HD */
#define CR7_DEFAULT     0x180c1
#define CR15_DEFAULT    0x06            /* TxJabber RxWatchdog */
#define TDES0_ERR_MASK  0x4302          /* TXJT, LC, EC, FUE */
#define MAX_PACKET_SIZE 1514
#define DMFE_MAX_MULTICAST 14
#define RX_COPY_SIZE	100
#define MAX_CHECK_PACKET 0x8000
#define DM9801_NOISE_FLOOR 8
#define DM9802_NOISE_FLOOR 5

#define DMFE_WOL_LINKCHANGE	0x20000000
#define DMFE_WOL_SAMPLEPACKET	0x10000000
#define DMFE_WOL_MAGICPACKET	0x08000000


#define DMFE_10MHF      0
#define DMFE_100MHF     1
#define DMFE_10MFD      4
#define DMFE_100MFD     5
#define DMFE_AUTO       8
#define DMFE_1M_HPNA    0x10

#define DMFE_TXTH_72	0x400000	/* TX TH 72 byte */
#define DMFE_TXTH_96	0x404000	/* TX TH 96 byte */
#define DMFE_TXTH_128	0x0000		/* TX TH 128 byte */
#define DMFE_TXTH_256	0x4000		/* TX TH 256 byte */
#define DMFE_TXTH_512	0x8000		/* TX TH 512 byte */
#define DMFE_TXTH_1K	0xC000		/* TX TH 1K  byte */

#define DMFE_TIMER_WUT  (jiffies + HZ * 1)/* timer wakeup time : 1 second */
#define DMFE_TX_TIMEOUT ((3*HZ)/2)	/* tx packet time-out time 1.5 s" */
#define DMFE_TX_KICK 	(HZ/2)	/* tx packet Kick-out time 0.5 s" */

#define DMFE_DBUG(dbug_now, msg, value) \
	do { \
 		if (dmfe_debug || (dbug_now)) \
			printk(KERN_ERR DRV_NAME ": %s %lx\n",\
 				(msg), (long) (value)); \
	} while (0)

#define SHOW_MEDIA_TYPE(mode) \
	printk (KERN_INFO DRV_NAME ": Change Speed to %sMhz %s duplex\n" , \
		(mode & 1) ? "100":"10", (mode & 4) ? "full":"half");


/* CR9 definition: SROM/MII */
#define CR9_SROM_READ   0x4800
#define CR9_SRCS        0x1
#define CR9_SRCLK       0x2
#define CR9_CRDOUT      0x8
#define SROM_DATA_0     0x0
#define SROM_DATA_1     0x4
#define PHY_DATA_1      0x20000
#define PHY_DATA_0      0x00000
#define MDCLKH          0x10000

#define PHY_POWER_DOWN	0x800

#define SROM_V41_CODE   0x14

#define SROM_CLK_WRITE(data, ioaddr) \
	outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr); \
	udelay(5); \
	outl(data|CR9_SROM_READ|CR9_SRCS|CR9_SRCLK,ioaddr); \
	udelay(5); \
	outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr); \
	udelay(5);

#define __CHK_IO_SIZE(pci_id, dev_rev) \
 (( ((pci_id)==PCI_DM9132_ID) || ((dev_rev) >= 0x30) ) ? \
	DM9102A_IO_SIZE: DM9102_IO_SIZE)

#define CHK_IO_SIZE(pci_dev) \
	(__CHK_IO_SIZE(((pci_dev)->device << 16) | (pci_dev)->vendor, \
	(pci_dev)->revision))

/* Sten Check */
#define DEVICE net_device

/* Structure/enum declaration ------------------------------- */
struct tx_desc {
        __le32 tdes0, tdes1, tdes2, tdes3; /* Data for the card */
        char *tx_buf_ptr;               /* Data for us */
        struct tx_desc *next_tx_desc;
} __attribute__(( aligned(32) ));

struct rx_desc {
	__le32 rdes0, rdes1, rdes2, rdes3; /* Data for the card */
	struct sk_buff *rx_skb_ptr;	/* Data for us */
	struct rx_desc *next_rx_desc;
} __attribute__(( aligned(32) ));

struct dmfe_board_info {
	u32 chip_id;			/* Chip vendor/Device ID */
	u8 chip_revision;		/* Chip revision */
	struct DEVICE *next_dev;	/* next device */
	struct pci_dev *pdev;		/* PCI device */
	spinlock_t lock;

	long ioaddr;			/* I/O base address */
	u32 cr0_data;
	u32 cr5_data;
	u32 cr6_data;
	u32 cr7_data;
	u32 cr15_data;

	/* pointer for memory physical address */
	dma_addr_t buf_pool_dma_ptr;	/* Tx buffer pool memory */
	dma_addr_t buf_pool_dma_start;	/* Tx buffer pool align dword */
	dma_addr_t desc_pool_dma_ptr;	/* descriptor pool memory */
	dma_addr_t first_tx_desc_dma;
	dma_addr_t first_rx_desc_dma;

	/* descriptor pointer */
	unsigned char *buf_pool_ptr;	/* Tx buffer pool memory */
	unsigned char *buf_pool_start;	/* Tx buffer pool align dword */
	unsigned char *desc_pool_ptr;	/* descriptor pool memory */
	struct tx_desc *first_tx_desc;
	struct tx_desc *tx_insert_ptr;
	struct tx_desc *tx_remove_ptr;
	struct rx_desc *first_rx_desc;
	struct rx_desc *rx_insert_ptr;
	struct rx_desc *rx_ready_ptr;	/* packet come pointer */
	unsigned long tx_packet_cnt;	/* transmitted packet count */
	unsigned long tx_queue_cnt;	/* wait to send packet count */
	unsigned long rx_avail_cnt;	/* available rx descriptor count */
	unsigned long interval_rx_cnt;	/* rx packet count a callback time */

	u16 HPNA_command;		/* For HPNA register 16 */
	u16 HPNA_timer;			/* For HPNA remote device check */
	u16 dbug_cnt;
	u16 NIC_capability;		/* NIC media capability */
	u16 PHY_reg4;			/* Saved Phyxcer register 4 value */

	u8 HPNA_present;		/* 0:none, 1:DM9801, 2:DM9802 */
	u8 chip_type;			/* Keep DM9102A chip type */
	u8 media_mode;			/* user specify media mode */
	u8 op_mode;			/* real work media mode */
	u8 phy_addr;
	u8 wait_reset;			/* Hardware failed, need to reset */
	u8 dm910x_chk_mode;		/* Operating mode check */
	u8 first_in_callback;		/* Flag to record state */
	u8 wol_mode;			/* user WOL settings */
	struct timer_list timer;

	/* System defined statistic counter */
	struct net_device_stats stats;

	/* Driver defined statistic counter */
	unsigned long tx_fifo_underrun;
	unsigned long tx_loss_carrier;
	unsigned long tx_no_carrier;
	unsigned long tx_late_collision;
	unsigned long tx_excessive_collision;
	unsigned long tx_jabber_timeout;
	unsigned long reset_count;
	unsigned long reset_cr8;
	unsigned long reset_fatal;
	unsigned long reset_TXtimeout;

	/* NIC SROM data */
	unsigned char srom[128];
};

enum dmfe_offsets {
	DCR0 = 0x00, DCR1 = 0x08, DCR2 = 0x10, DCR3 = 0x18, DCR4 = 0x20,
	DCR5 = 0x28, DCR6 = 0x30, DCR7 = 0x38, DCR8 = 0x40, DCR9 = 0x48,
	DCR10 = 0x50, DCR11 = 0x58, DCR12 = 0x60, DCR13 = 0x68, DCR14 = 0x70,
	DCR15 = 0x78
};

enum dmfe_CR6_bits {
	CR6_RXSC = 0x2, CR6_PBF = 0x8, CR6_PM = 0x40, CR6_PAM = 0x80,
	CR6_FDM = 0x200, CR6_TXSC = 0x2000, CR6_STI = 0x100000,
	CR6_SFT = 0x200000, CR6_RXA = 0x40000000, CR6_NO_PURGE = 0x20000000
};

/* Global variable declaration ----------------------------- */
static int __devinitdata printed_version;
static char version[] __devinitdata =
	KERN_INFO DRV_NAME ": Davicom DM9xxx net driver, version "
	DRV_VERSION " (" DRV_RELDATE ")\n";

static int dmfe_debug;
static unsigned char dmfe_media_mode = DMFE_AUTO;
static u32 dmfe_cr6_user_set;

/* For module input parameter */
static int debug;
static u32 cr6set;
static unsigned char mode = 8;
static u8 chkmode = 1;
static u8 HPNA_mode;		/* Default: Low Power/High Speed */
static u8 HPNA_rx_cmd;		/* Default: Disable Rx remote command */
static u8 HPNA_tx_cmd;		/* Default: Don't issue remote command */
static u8 HPNA_NoiseFloor;	/* Default: HPNA NoiseFloor */
static u8 SF_mode;		/* Special Function: 1:VLAN, 2:RX Flow Control
				   4: TX pause packet */


/* function declaration ------------------------------------- */
static int dmfe_open(struct DEVICE *);
static int dmfe_start_xmit(struct sk_buff *, struct DEVICE *);
static int dmfe_stop(struct DEVICE *);
static struct net_device_stats * dmfe_get_stats(struct DEVICE *);
static void dmfe_set_filter_mode(struct DEVICE *);
static const struct ethtool_ops netdev_ethtool_ops;
static u16 read_srom_word(long ,int);
static irqreturn_t dmfe_interrupt(int , void *);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void poll_dmfe (struct net_device *dev);
#endif
static void dmfe_descriptor_init(struct dmfe_board_info *, unsigned long);
static void allocate_rx_buffer(struct dmfe_board_info *);
static void update_cr6(u32, unsigned long);
static void send_filter_frame(struct DEVICE * ,int);
static void dm9132_id_table(struct DEVICE * ,int);
static u16 phy_read(unsigned long, u8, u8, u32);
static void phy_write(unsigned long, u8, u8, u16, u32);
static void phy_write_1bit(unsigned long, u32);
static u16 phy_read_1bit(unsigned long);
static u8 dmfe_sense_speed(struct dmfe_board_info *);
static void dmfe_process_mode(struct dmfe_board_info *);
static void dmfe_timer(unsigned long);
static inline u32 cal_CRC(unsigned char *, unsigned int, u8);
static void dmfe_rx_packet(struct DEVICE *, struct dmfe_board_info *);
static void dmfe_free_tx_pkt(struct DEVICE *, struct dmfe_board_info *);
static void dmfe_reuse_skb(struct dmfe_board_info *, struct sk_buff *);
static void dmfe_dynamic_reset(struct DEVICE *);
static void dmfe_free_rxbuffer(struct dmfe_board_info *);
static void dmfe_init_dm910x(struct DEVICE *);
static void dmfe_parse_srom(struct dmfe_board_info *);
static void dmfe_program_DM9801(struct dmfe_board_info *, int);
static void dmfe_program_DM9802(struct dmfe_board_info *);
static void dmfe_HPNA_remote_cmd_chk(struct dmfe_board_info * );
static void dmfe_set_phyxcer(struct dmfe_board_info *);

/* DM910X network board routine ---------------------------- */

/*
 *	Search DM910X board ,allocate space and register it
 */

static int __devinit dmfe_init_one (struct pci_dev *pdev,
				    const struct pci_device_id *ent)
{
	struct dmfe_board_info *db;	/* board information structure */
	struct net_device *dev;
	u32 pci_pmr;
	int i, err;
	DECLARE_MAC_BUF(mac);

	DMFE_DBUG(0, "dmfe_init_one()", 0);

	if (!printed_version++)
		printk(version);

	/* Init network device */
	dev = alloc_etherdev(sizeof(*db));
	if (dev == NULL)
		return -ENOMEM;
	SET_NETDEV_DEV(dev, &pdev->dev);

	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
		printk(KERN_WARNING DRV_NAME
			": 32-bit PCI DMA not available.\n");
		err = -ENODEV;
		goto err_out_free;
	}

	/* Enable Master/IO access, Disable memory access */
	err = pci_enable_device(pdev);
	if (err)
		goto err_out_free;

	if (!pci_resource_start(pdev, 0)) {
		printk(KERN_ERR DRV_NAME ": I/O base is zero\n");
		err = -ENODEV;
		goto err_out_disable;
	}

	if (pci_resource_len(pdev, 0) < (CHK_IO_SIZE(pdev)) ) {
		printk(KERN_ERR DRV_NAME ": Allocated I/O size too small\n");
		err = -ENODEV;
		goto err_out_disable;
	}

#if 0	/* pci_{enable_device,set_master} sets minimum latency for us now */

	/* Set Latency Timer 80h */
	/* FIXME: setting values > 32 breaks some SiS 559x stuff.
	   Need a PCI quirk.. */

	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80);
#endif

	if (pci_request_regions(pdev, DRV_NAME)) {
		printk(KERN_ERR DRV_NAME ": Failed to request PCI regions\n");
		err = -ENODEV;
		goto err_out_disable;
	}

	/* Init system & device */
	db = netdev_priv(dev);

	/* Allocate Tx/Rx descriptor memory */
	db->desc_pool_ptr = pci_alloc_consistent(pdev, sizeof(struct tx_desc) *
			DESC_ALL_CNT + 0x20, &db->desc_pool_dma_ptr);

	db->buf_pool_ptr = pci_alloc_consistent(pdev, TX_BUF_ALLOC *
			TX_DESC_CNT + 4, &db->buf_pool_dma_ptr);

	db->first_tx_desc = (struct tx_desc *) db->desc_pool_ptr;
	db->first_tx_desc_dma = db->desc_pool_dma_ptr;
	db->buf_pool_start = db->buf_pool_ptr;
	db->buf_pool_dma_start = db->buf_pool_dma_ptr;

	db->chip_id = ent->driver_data;
	db->ioaddr = pci_resource_start(pdev, 0);
	db->chip_revision = pdev->revision;
	db->wol_mode = 0;

	db->pdev = pdev;

	dev->base_addr = db->ioaddr;
	dev->irq = pdev->irq;
	pci_set_drvdata(pdev, dev);
	dev->open = &dmfe_open;
	dev->hard_start_xmit = &dmfe_start_xmit;
	dev->stop = &dmfe_stop;
	dev->get_stats = &dmfe_get_stats;
	dev->set_multicast_list = &dmfe_set_filter_mode;
#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = &poll_dmfe;
#endif
	dev->ethtool_ops = &netdev_ethtool_ops;
	netif_carrier_off(dev);
	spin_lock_init(&db->lock);

	pci_read_config_dword(pdev, 0x50, &pci_pmr);
	pci_pmr &= 0x70000;
	if ( (pci_pmr == 0x10000) && (db->chip_revision == 0x31) )
		db->chip_type = 1;	/* DM9102A E3 */
	else
		db->chip_type = 0;

	/* read 64 word srom data */
	for (i = 0; i < 64; i++)
		((__le16 *) db->srom)[i] =
			cpu_to_le16(read_srom_word(db->ioaddr, i));

	/* Set Node address */
	for (i = 0; i < 6; i++)
		dev->dev_addr[i] = db->srom[20 + i];

	err = register_netdev (dev);
	if (err)
		goto err_out_res;

	printk(KERN_INFO "%s: Davicom DM%04lx at pci%s, "
	       "%s, irq %d.\n",
	       dev->name,
	       ent->driver_data >> 16,
	       pci_name(pdev),
	       print_mac(mac, dev->dev_addr),
	       dev->irq);

	pci_set_master(pdev);

	return 0;

err_out_res:
	pci_release_regions(pdev);
err_out_disable:
	pci_disable_device(pdev);
err_out_free:
	pci_set_drvdata(pdev, NULL);
	free_netdev(dev);

	return err;
}


static void __devexit dmfe_remove_one (struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct dmfe_board_info *db = netdev_priv(dev);

	DMFE_DBUG(0, "dmfe_remove_one()", 0);

 	if (dev) {

		unregister_netdev(dev);

		pci_free_consistent(db->pdev, sizeof(struct tx_desc) *
					DESC_ALL_CNT + 0x20, db->desc_pool_ptr,
 					db->desc_pool_dma_ptr);
		pci_free_consistent(db->pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
					db->buf_pool_ptr, db->buf_pool_dma_ptr);
		pci_release_regions(pdev);
		free_netdev(dev);	/* free board information */

		pci_set_drvdata(pdev, NULL);
	}

	DMFE_DBUG(0, "dmfe_remove_one() exit", 0);
}


/*
 *	Open the interface.
 *	The interface is opened whenever "ifconfig" actives it.
 */

static int dmfe_open(struct DEVICE *dev)
{
	int ret;
	struct dmfe_board_info *db = netdev_priv(dev);

	DMFE_DBUG(0, "dmfe_open", 0);

	ret = request_irq(dev->irq, &dmfe_interrupt,
			  IRQF_SHARED, dev->name, dev);
	if (ret)
		return ret;

	/* system variable init */
	db->cr6_data = CR6_DEFAULT | dmfe_cr6_user_set;
	db->tx_packet_cnt = 0;
	db->tx_queue_cnt = 0;
	db->rx_avail_cnt = 0;
	db->wait_reset = 0;

	db->first_in_callback = 0;
	db->NIC_capability = 0xf;	/* All capability*/
	db->PHY_reg4 = 0x1e0;

	/* CR6 operation mode decision */
	if ( !chkmode || (db->chip_id == PCI_DM9132_ID) ||
		(db->chip_revision >= 0x30) ) {
    		db->cr6_data |= DMFE_TXTH_256;
		db->cr0_data = CR0_DEFAULT;
		db->dm910x_chk_mode=4;		/* Enter the normal mode */
 	} else {
		db->cr6_data |= CR6_SFT;	/* Store & Forward mode */
		db->cr0_data = 0;
		db->dm910x_chk_mode = 1;	/* Enter the check mode */
	}