[PATCH] DM9000 network driver
This patch adds support for the davicom dm9000 network driver. The dm9000
is found on some embedded arm boards such as the pimx1 or the scb9328.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
diff -puN /dev/null drivers/net/dm9000.c
diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
new file mode 100644
index 0000000..f4ba0ff
--- /dev/null
+++ b/drivers/net/dm9000.c
@@ -0,0 +1,1219 @@
+/*
+ * dm9000.c: Version 1.2 03/18/2003
+ *
+ * A Davicom DM9000 ISA 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.
+ *
+ * (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
+ *
+ * V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
+ * 06/22/2001 Support DM9801 progrmming
+ * E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
+ * E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
+ * R17 = (R17 & 0xfff0) | NF + 3
+ * E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
+ * R17 = (R17 & 0xfff0) | NF
+ *
+ * v1.00 modify by simon 2001.9.5
+ * change for kernel 2.4.x
+ *
+ * v1.1 11/09/2001 fix force mode bug
+ *
+ * v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
+ * Fixed phy reset.
+ * Added tx/rx 32 bit mode.
+ * Cleaned up for kernel merge.
+ *
+ * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de>
+ * Port to 2.6 kernel
+ *
+ * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk>
+ * Cleanup of code to remove ifdefs
+ * Allowed platform device data to influence access width
+ * Reformatting areas of code
+ *
+ * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de>
+ * * removed 2.4 style module parameters
+ * * removed removed unused stat counter and fixed
+ * net_device_stats
+ * * introduced tx_timeout function
+ * * reworked locking
+ */
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/dm9000.h>
+#include <linux/delay.h>
+
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include "dm9000.h"
+
+/* Board/System/Debug information/definition ---------------- */
+
+#define DM9000_PHY 0x40 /* PHY address 0x01 */
+
+#define TRUE 1
+#define FALSE 0
+
+#define CARDNAME "dm9000"
+#define PFX CARDNAME ": "
+
+#define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
+
+#define DM9000_DEBUG 0
+
+#if DM9000_DEBUG > 2
+#define PRINTK3(args...) printk(CARDNAME ": " args)
+#else
+#define PRINTK3(args...) do { } while(0)
+#endif
+
+#if DM9000_DEBUG > 1
+#define PRINTK2(args...) printk(CARDNAME ": " args)
+#else
+#define PRINTK2(args...) do { } while(0)
+#endif
+
+#if DM9000_DEBUG > 0
+#define PRINTK1(args...) printk(CARDNAME ": " args)
+#define PRINTK(args...) printk(CARDNAME ": " args)
+#else
+#define PRINTK1(args...) do { } while(0)
+#define PRINTK(args...) printk(KERN_DEBUG args)
+#endif
+
+/*
+ * Transmit timeout, default 5 seconds.
+ */
+static int watchdog = 5000;
+module_param(watchdog, int, 0400);
+MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
+
+/* Structure/enum declaration ------------------------------- */
+typedef struct board_info {
+
+ void __iomem *io_addr; /* Register I/O base address */
+ void __iomem *io_data; /* Data I/O address */
+ u16 irq; /* IRQ */
+
+ u16 tx_pkt_cnt;
+ u16 queue_pkt_len;
+ u16 queue_start_addr;
+ u16 dbug_cnt;
+ u8 io_mode; /* 0:word, 2:byte */
+ u8 phy_addr;
+
+ void (*inblk)(void __iomem *port, void *data, int length);
+ void (*outblk)(void __iomem *port, void *data, int length);
+ void (*dumpblk)(void __iomem *port, int length);
+
+ struct resource *addr_res; /* resources found */
+ struct resource *data_res;
+ struct resource *addr_req; /* resources requested */
+ struct resource *data_req;
+ struct resource *irq_res;
+
+ struct timer_list timer;
+ struct net_device_stats stats;
+ unsigned char srom[128];
+ spinlock_t lock;
+
+ struct mii_if_info mii;
+ u32 msg_enable;
+} board_info_t;
+
+/* function declaration ------------------------------------- */
+static int dm9000_probe(struct device *);
+static int dm9000_open(struct net_device *);
+static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
+static int dm9000_stop(struct net_device *);
+static int dm9000_do_ioctl(struct net_device *, struct ifreq *, int);
+
+
+static void dm9000_timer(unsigned long);
+static void dm9000_init_dm9000(struct net_device *);
+
+static struct net_device_stats *dm9000_get_stats(struct net_device *);
+
+static irqreturn_t dm9000_interrupt(int, void *, struct pt_regs *);
+
+static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
+static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
+ int value);
+static u16 read_srom_word(board_info_t *, int);
+static void dm9000_rx(struct net_device *);
+static void dm9000_hash_table(struct net_device *);
+
+//#define DM9000_PROGRAM_EEPROM
+#ifdef DM9000_PROGRAM_EEPROM
+static void program_eeprom(board_info_t * db);
+#endif
+/* DM9000 network board routine ---------------------------- */
+
+static void
+dm9000_reset(board_info_t * db)
+{
+ PRINTK1("dm9000x: resetting\n");
+ /* RESET device */
+ writeb(DM9000_NCR, db->io_addr);
+ udelay(200);
+ writeb(NCR_RST, db->io_data);
+ udelay(200);
+}
+
+/*
+ * Read a byte from I/O port
+ */
+static u8
+ior(board_info_t * db, int reg)
+{
+ writeb(reg, db->io_addr);
+ return readb(db->io_data);
+}
+
+/*
+ * Write a byte to I/O port
+ */
+
+static void
+iow(board_info_t * db, int reg, int value)
+{
+ writeb(reg, db->io_addr);
+ writeb(value, db->io_data);
+}
+
+/* routines for sending block to chip */
+
+static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
+{
+ writesb(reg, data, count);
+}
+
+static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
+{
+ writesw(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
+{
+ writesl(reg, data, (count+3) >> 2);
+}
+
+/* input block from chip to memory */
+
+static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
+{
+ readsb(reg, data, count+1);
+}
+
+
+static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
+{
+ readsw(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
+{
+ readsl(reg, data, (count+3) >> 2);
+}
+
+/* dump block from chip to null */
+
+static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
+{
+ int i;
+ int tmp;
+
+ for (i = 0; i < count; i++)
+ tmp = readb(reg);
+}
+
+static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
+{
+ int i;
+ int tmp;
+
+ count = (count + 1) >> 1;
+
+ for (i = 0; i < count; i++)
+ tmp = readw(reg);
+}
+
+static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
+{
+ int i;
+ int tmp;
+
+ count = (count + 3) >> 2;
+
+ for (i = 0; i < count; i++)
+ tmp = readl(reg);
+}
+
+/* dm9000_set_io
+ *
+ * select the specified set of io routines to use with the
+ * device
+ */
+
+static void dm9000_set_io(struct board_info *db, int byte_width)
+{
+ /* use the size of the data resource to work out what IO
+ * routines we want to use
+ */
+
+ switch (byte_width) {
+ case 1:
+ db->dumpblk = dm9000_dumpblk_8bit;
+ db->outblk = dm9000_outblk_8bit;
+ db->inblk = dm9000_inblk_8bit;
+ break;
+
+ case 2:
+ db->dumpblk = dm9000_dumpblk_16bit;
+ db->outblk = dm9000_outblk_16bit;
+ db->inblk = dm9000_inblk_16bit;
+ break;
+
+ case 3:
+ printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
+ db->dumpblk = dm9000_dumpblk_16bit;
+ db->outblk = dm9000_outblk_16bit;
+ db->inblk = dm9000_inblk_16bit;
+ break;
+
+ case 4:
+ default:
+ db->dumpblk = dm9000_dumpblk_32bit;
+ db->outblk = dm9000_outblk_32bit;
+ db->inblk = dm9000_inblk_32bit;
+ break;
+ }
+}
+
+
+/* Our watchdog timed out. Called by the networking layer */
+static void dm9000_timeout(struct net_device *dev)
+{
+ board_info_t *db = (board_info_t *) dev->priv;
+ u8 reg_save;
+ unsigned long flags;
+
+ /* Save previous register address */
+ reg_save = readb(db->io_addr);
+ spin_lock_irqsave(db->lock,flags);
+
+ netif_stop_queue(dev);
+ dm9000_reset(db);
+ dm9000_init_dm9000(dev);
+ /* We can accept TX packets again */
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+
+ /* Restore previous register address */
+ writeb(reg_save, db->io_addr);
+ spin_unlock_irqrestore(db->lock,flags);
+}
+
+
+/* dm9000_release_board
+ *
+ * release a board, and any mapped resources
+ */
+
+static void
+dm9000_release_board(struct platform_device *pdev, struct board_info *db)
+{
+ if (db->data_res == NULL) {
+ if (db->addr_res != NULL)
+ release_mem_region((unsigned long)db->io_addr, 4);
+ return;
+ }
+
+ /* unmap our resources */
+
+ iounmap(db->io_addr);
+ iounmap(db->io_data);
+
+ /* release the resources */
+
+ if (db->data_req != NULL) {
+ release_resource(db->data_req);
+ kfree(db->data_req);
+ }
+
+ if (db->addr_res != NULL) {
+ release_resource(db->data_req);
+ kfree(db->addr_req);
+ }
+}
+
+#define res_size(_r) (((_r)->end - (_r)->start) + 1)
+
+/*
+ * Search DM9000 board, allocate space and register it
+ */
+static int
+dm9000_probe(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct dm9000_plat_data *pdata = pdev->dev.platform_data;
+ struct board_info *db; /* Point a board information structure */
+ struct net_device *ndev;
+ unsigned long base;
+ int ret = 0;
+ int iosize;
+ int i;
+ u32 id_val;
+
+ printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
+
+ /* Init network device */
+ ndev = alloc_etherdev(sizeof (struct board_info));
+ if (!ndev) {
+ printk("%s: could not allocate device.\n", CARDNAME);
+ return -ENOMEM;
+ }
+
+ SET_MODULE_OWNER(ndev);
+ SET_NETDEV_DEV(ndev, dev);
+
+ PRINTK2("dm9000_probe()");
+
+ /* setup board info structure */
+ db = (struct board_info *) ndev->priv;
+ memset(db, 0, sizeof (*db));
+
+ if (pdev->num_resources < 2) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ switch (pdev->num_resources) {
+ case 2:
+ base = pdev->resource[0].start;
+
+ if (!request_mem_region(base, 4, ndev->name)) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ ndev->base_addr = base;
+ ndev->irq = pdev->resource[1].start;
+ db->io_addr = (void *)base;
+ db->io_data = (void *)(base + 4);
+
+ break;
+
+ case 3:
+ db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+ if (db->addr_res == NULL || db->data_res == NULL) {
+ printk(KERN_ERR PFX "insufficient resources\n");
+ ret = -ENOENT;
+ goto out;
+ }
+
+ i = res_size(db->addr_res);
+ db->addr_req = request_mem_region(db->addr_res->start, i,
+ pdev->name);
+
+ if (db->addr_req == NULL) {
+ printk(KERN_ERR PFX "cannot claim address reg area\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ db->io_addr = ioremap(db->addr_res->start, i);
+
+ if (db->io_addr == NULL) {
+ printk(KERN_ERR "failed to ioremap address reg\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ iosize = res_size(db->data_res);
+ db->data_req = request_mem_region(db->data_res->start, iosize,
+ pdev->name);
+
+ if (db->data_req == NULL) {
+ printk(KERN_ERR PFX "cannot claim data reg area\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ db->io_data = ioremap(db->data_res->start, iosize);
+
+ if (db->io_data == NULL) {
+ printk(KERN_ERR "failed to ioremap data reg\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* fill in parameters for net-dev structure */
+
+ ndev->base_addr = (unsigned long)db->io_addr;
+ ndev->irq = db->irq_res->start;
+
+ /* ensure at least we have a default set of IO routines */
+ dm9000_set_io(db, iosize);
+
+ }
+
+ /* check to see if anything is being over-ridden */
+ if (pdata != NULL) {
+ /* check to see if the driver wants to over-ride the
+ * default IO width */
+
+ if (pdata->flags & DM9000_PLATF_8BITONLY)
+ dm9000_set_io(db, 1);
+
+ if (pdata->flags & DM9000_PLATF_16BITONLY)
+ dm9000_set_io(db, 2);
+
+ if (pdata->flags & DM9000_PLATF_32BITONLY)
+ dm9000_set_io(db, 4);
+
+ /* check to see if there are any IO routine
+ * over-rides */
+
+ if (pdata->inblk != NULL)
+ db->inblk = pdata->inblk;
+
+ if (pdata->outblk != NULL)
+ db->outblk = pdata->outblk;
+
+ if (pdata->dumpblk != NULL)
+ 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;
+ ndev->do_ioctl = &dm9000_do_ioctl;
+
+#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))
+ printk("%s: Invalid ethernet MAC address. Please "
+ "set using ifconfig\n", ndev->name);
+
+ dev_set_drvdata(dev, 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);
+ kfree(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, SA_SHIRQ, 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 * 2;
+ 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;
+ spin_lock_init(&db->lock);
+}
+
+/*
+ * 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)
+{
+ board_info_t *db = (board_info_t *) dev->priv;
+
+ PRINTK3("dm9000_start_xmit\n");
+
+ if (db->tx_pkt_cnt > 1)
+ return 1;
+
+ netif_stop_queue(dev);
+
+ /* Disable all interrupts */
+ iow(db, DM9000_IMR, IMR_PAR);
+
+ /* 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;
+
+ /* TX control: First packet immediately send, second packet queue */
+ if (db->tx_pkt_cnt == 0) {
+
+ /* First Packet */
+ db->tx_pkt_cnt++;
+
+ /* 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->tx_pkt_cnt++;
+ db->queue_pkt_len = skb->len;
+ }
+
+ /* free this SKB */
+ dev_kfree_skb(skb);
+
+ /* Re-enable resource check */
+ if (db->tx_pkt_cnt == 1)
+ netif_wake_queue(dev);
+
+ /* Re-enable interrupt */
+ iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
+
+ 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
+ */
+
+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 pt_regs *regs)
+{
+ 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;
+}
+
+/*
+ * Process the upper socket ioctl command
+ */
+static int
+dm9000_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ PRINTK1("entering %s\n",__FUNCTION__);
+ return 0;
+}
+
+/*
+ * 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;
+ u8 reg_save;
+ unsigned long flags;
+
+ PRINTK3("dm9000_timer()\n");
+
+ spin_lock_irqsave(db->lock,flags);
+ /* Save previous register address */
+ reg_save = readb(db->io_addr);
+
+ mii_check_media(&db->mii, netif_msg_link(db), 0);
+
+ /* Restore previous register address */
+ writeb(reg_save, db->io_addr);
+ spin_unlock_irqrestore(db->lock,flags);
+
+ /* 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;
+ int 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->dev = dev;
+ 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;
+ int ret;
+
+ spin_lock_irqsave(&db->lock,flags);
+ /* 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);
+
+ 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;
+
+ spin_lock_irqsave(&db->lock,flags);
+
+ /* 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 */
+
+ spin_unlock_irqrestore(&db->lock,flags);
+}
+
+static int
+dm9000_drv_suspend(struct device *dev, u32 state, u32 level)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+
+ if (ndev && level == SUSPEND_DISABLE) {
+ if (netif_running(ndev)) {
+ netif_device_detach(ndev);
+ dm9000_shutdown(ndev);
+ }
+ }
+ return 0;
+}
+
+static int
+dm9000_drv_resume(struct device *dev, u32 level)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ board_info_t *db = (board_info_t *) ndev->priv;
+
+ if (ndev && level == RESUME_ENABLE) {
+
+ if (netif_running(ndev)) {
+ dm9000_reset(db);
+ dm9000_init_dm9000(ndev);
+
+ netif_device_attach(ndev);
+ }
+ }
+ return 0;
+}
+
+static int
+dm9000_drv_remove(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct net_device *ndev = dev_get_drvdata(dev);
+
+ dev_set_drvdata(dev, NULL);
+
+ unregister_netdev(ndev);
+ dm9000_release_board(pdev, (board_info_t *) ndev->priv);
+ kfree(ndev); /* free device structure */
+
+ PRINTK1("clean_module() exit\n");
+
+ return 0;
+}
+
+static struct device_driver dm9000_driver = {
+ .name = "dm9000",
+ .bus = &platform_bus_type,
+ .probe = dm9000_probe,
+ .remove = dm9000_drv_remove,
+ .suspend = dm9000_drv_suspend,
+ .resume = dm9000_drv_resume,
+};
+
+static int __init
+dm9000_init(void)
+{
+ return driver_register(&dm9000_driver); /* search board and register */
+}
+
+static void __exit
+dm9000_cleanup(void)
+{
+ 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");