Hello all,
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.
Sascha Hauer
Signed-off-by: Sascha Hauer <[email protected]>
diff -urN linux-2.6.11/drivers/net/Kconfig linux-2.6.11-work/drivers/net/Kconfig
--- linux-2.6.11/drivers/net/Kconfig 2005-03-02 08:38:25.000000000 +0100
+++ linux-2.6.11-work/drivers/net/Kconfig 2005-03-17 12:33:26.000000000 +0100
@@ -849,6 +849,18 @@
<file:Documentation/networking/net-modules.txt>. The module
will be called smc9194.
+config DM9000
+ tristate "DM9000 support"
+ depends on ARM && NET_ETHERNET
+ select CRC32
+ select MII
+ ---help---
+ Support for DM9000 chipset.
+
+ To compile this driver as a module, choose M here and read
+ <file:Documentation/networking/net-modules.txt>. The module will be
+ called dm9000.
+
config NET_VENDOR_RACAL
bool "Racal-Interlan (Micom) NI cards"
depends on NET_ETHERNET && ISA
diff -urN linux-2.6.11/drivers/net/Makefile linux-2.6.11-work/drivers/net/Makefile
--- linux-2.6.11/drivers/net/Makefile 2005-03-02 08:37:52.000000000 +0100
+++ linux-2.6.11-work/drivers/net/Makefile 2005-03-17 12:32:16.000000000 +0100
@@ -181,6 +181,7 @@
obj-$(CONFIG_IBMVETH) += ibmveth.o
obj-$(CONFIG_S2IO) += s2io.o
obj-$(CONFIG_SMC91X) += smc91x.o
+obj-$(CONFIG_DM9000) += dm9000.o
obj-$(CONFIG_FEC_8XX) += fec_8xx/
obj-$(CONFIG_ARM) += arm/
diff -urN linux-2.6.11/drivers/net/dm9000.c linux-2.6.11-work/drivers/net/dm9000.c
--- linux-2.6.11/drivers/net/dm9000.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.11-work/drivers/net/dm9000.c 2005-03-17 16:04:49.000000000 +0100
@@ -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 <[email protected]>:
+ * Fixed phy reset.
+ * Added tx/rx 32 bit mode.
+ * Cleaned up for kernel merge.
+ *
+ * 03/03/2004 Sascha Hauer <[email protected]>
+ * Port to 2.6 kernel
+ *
+ * 24-Sep-2004 Ben Dooks <[email protected]>
+ * Cleanup of code to remove ifdefs
+ * Allowed platform device data to influence access width
+ * Reformatting areas of code
+ *
+ * 17-Mar-2005 Sascha Hauer <[email protected]>
+ * * 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");
diff -urN linux-2.6.11/drivers/net/dm9000.h linux-2.6.11-work/drivers/net/dm9000.h
--- linux-2.6.11/drivers/net/dm9000.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.11-work/drivers/net/dm9000.h 2005-03-17 15:59:43.000000000 +0100
@@ -0,0 +1,135 @@
+/*
+ * dm9000 Ethernet
+ */
+
+#ifndef _DM9000X_H_
+#define _DM9000X_H_
+
+#define DM9000_ID 0x90000A46
+
+/* although the registers are 16 bit, they are 32-bit aligned.
+ */
+
+#define DM9000_NCR 0x00
+#define DM9000_NSR 0x01
+#define DM9000_TCR 0x02
+#define DM9000_TSR1 0x03
+#define DM9000_TSR2 0x04
+#define DM9000_RCR 0x05
+#define DM9000_RSR 0x06
+#define DM9000_ROCR 0x07
+#define DM9000_BPTR 0x08
+#define DM9000_FCTR 0x09
+#define DM9000_FCR 0x0A
+#define DM9000_EPCR 0x0B
+#define DM9000_EPAR 0x0C
+#define DM9000_EPDRL 0x0D
+#define DM9000_EPDRH 0x0E
+#define DM9000_WCR 0x0F
+
+#define DM9000_PAR 0x10
+#define DM9000_MAR 0x16
+
+#define DM9000_GPCR 0x1e
+#define DM9000_GPR 0x1f
+#define DM9000_TRPAL 0x22
+#define DM9000_TRPAH 0x23
+#define DM9000_RWPAL 0x24
+#define DM9000_RWPAH 0x25
+
+#define DM9000_VIDL 0x28
+#define DM9000_VIDH 0x29
+#define DM9000_PIDL 0x2A
+#define DM9000_PIDH 0x2B
+
+#define DM9000_CHIPR 0x2C
+#define DM9000_SMCR 0x2F
+
+#define DM9000_MRCMDX 0xF0
+#define DM9000_MRCMD 0xF2
+#define DM9000_MRRL 0xF4
+#define DM9000_MRRH 0xF5
+#define DM9000_MWCMDX 0xF6
+#define DM9000_MWCMD 0xF8
+#define DM9000_MWRL 0xFA
+#define DM9000_MWRH 0xFB
+#define DM9000_TXPLL 0xFC
+#define DM9000_TXPLH 0xFD
+#define DM9000_ISR 0xFE
+#define DM9000_IMR 0xFF
+
+#define NCR_EXT_PHY (1<<7)
+#define NCR_WAKEEN (1<<6)
+#define NCR_FCOL (1<<4)
+#define NCR_FDX (1<<3)
+#define NCR_LBK (3<<1)
+#define NCR_RST (1<<0)
+
+#define NSR_SPEED (1<<7)
+#define NSR_LINKST (1<<6)
+#define NSR_WAKEST (1<<5)
+#define NSR_TX2END (1<<3)
+#define NSR_TX1END (1<<2)
+#define NSR_RXOV (1<<1)
+
+#define TCR_TJDIS (1<<6)
+#define TCR_EXCECM (1<<5)
+#define TCR_PAD_DIS2 (1<<4)
+#define TCR_CRC_DIS2 (1<<3)
+#define TCR_PAD_DIS1 (1<<2)
+#define TCR_CRC_DIS1 (1<<1)
+#define TCR_TXREQ (1<<0)
+
+#define TSR_TJTO (1<<7)
+#define TSR_LC (1<<6)
+#define TSR_NC (1<<5)
+#define TSR_LCOL (1<<4)
+#define TSR_COL (1<<3)
+#define TSR_EC (1<<2)
+
+#define RCR_WTDIS (1<<6)
+#define RCR_DIS_LONG (1<<5)
+#define RCR_DIS_CRC (1<<4)
+#define RCR_ALL (1<<3)
+#define RCR_RUNT (1<<2)
+#define RCR_PRMSC (1<<1)
+#define RCR_RXEN (1<<0)
+
+#define RSR_RF (1<<7)
+#define RSR_MF (1<<6)
+#define RSR_LCS (1<<5)
+#define RSR_RWTO (1<<4)
+#define RSR_PLE (1<<3)
+#define RSR_AE (1<<2)
+#define RSR_CE (1<<1)
+#define RSR_FOE (1<<0)
+
+#define FCTR_HWOT(ot) (( ot & 0xf ) << 4 )
+#define FCTR_LWOT(ot) ( ot & 0xf )
+
+#define IMR_PAR (1<<7)
+#define IMR_ROOM (1<<3)
+#define IMR_ROM (1<<2)
+#define IMR_PTM (1<<1)
+#define IMR_PRM (1<<0)
+
+#define ISR_ROOS (1<<3)
+#define ISR_ROS (1<<2)
+#define ISR_PTS (1<<1)
+#define ISR_PRS (1<<0)
+#define ISR_CLR_STATUS (ISR_ROOS | ISR_ROS | ISR_PTS | ISR_PRS)
+
+#define EPCR_REEP (1<<5)
+#define EPCR_WEP (1<<4)
+#define EPCR_EPOS (1<<3)
+#define EPCR_ERPRR (1<<2)
+#define EPCR_ERPRW (1<<1)
+#define EPCR_ERRE (1<<0)
+
+#define GPCR_GEP_CNTL (1<<0)
+
+#define DM9000_PKT_RDY 0x01 /* Packet ready to receive */
+#define DM9000_PKT_MAX 1536 /* Received packet max size */
+
+#endif /* _DM9000X_H_ */
+
diff -urN linux-2.6.11/include/linux/dm9000.h linux-2.6.11-work/include/linux/dm9000.h
--- linux-2.6.11/include/linux/dm9000.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.11-work/include/linux/dm9000.h 2005-03-17 12:34:36.000000000 +0100
@@ -0,0 +1,36 @@
+/* include/linux/dm9000.h
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ * Ben Dooks <[email protected]>
+ *
+ * Header file for dm9000 platform data
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#ifndef __DM9000_PLATFORM_DATA
+#define __DM9000_PLATFORM_DATA __FILE__
+
+/* IO control flags */
+
+#define DM9000_PLATF_8BITONLY (0x0001)
+#define DM9000_PLATF_16BITONLY (0x0002)
+#define DM9000_PLATF_32BITONLY (0x0004)
+
+/* platfrom data for platfrom device structure's platfrom_data field */
+
+struct dm9000_plat_data {
+ unsigned int flags;
+
+ /* allow replacement IO routines */
+
+ void (*inblk)(void __iomem *reg, void *data, int len);
+ void (*outblk)(void __iomem *reg, void *data, int len);
+ void (*dumpblk)(void __iomem *reg, int len);
+};
+
+#endif /* __DM9000_PLATFORM_DATA */
+
Sacrificing readibility a little bit, you could do something useful.
Instead of those ugly switch statements you could define function
pointer arrays and call appropriate function
switch(foo) {
case 1:
f1();
case2 :
f2();
};
could well become
void (*func)[] = { f1, f2 };
func(i);
On Fri, 18 Mar 2005 14:31:44 +0100, Sascha Hauer <[email protected]> wrote:
>
> Hello all,
>
> 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.
>
> Sascha Hauer
>
> Signed-off-by: Sascha Hauer <[email protected]>
>
> diff -urN linux-2.6.11/drivers/net/Kconfig linux-2.6.11-work/drivers/net/Kconfig
> --- linux-2.6.11/drivers/net/Kconfig 2005-03-02 08:38:25.000000000 +0100
> +++ linux-2.6.11-work/drivers/net/Kconfig 2005-03-17 12:33:26.000000000 +0100
> @@ -849,6 +849,18 @@
> <file:Documentation/networking/net-modules.txt>. The module
> will be called smc9194.
>
> +config DM9000
> + tristate "DM9000 support"
> + depends on ARM && NET_ETHERNET
> + select CRC32
> + select MII
> + ---help---
> + Support for DM9000 chipset.
> +
> + To compile this driver as a module, choose M here and read
> + <file:Documentation/networking/net-modules.txt>. The module will be
> + called dm9000.
> +
> config NET_VENDOR_RACAL
> bool "Racal-Interlan (Micom) NI cards"
> depends on NET_ETHERNET && ISA
> diff -urN linux-2.6.11/drivers/net/Makefile linux-2.6.11-work/drivers/net/Makefile
> --- linux-2.6.11/drivers/net/Makefile 2005-03-02 08:37:52.000000000 +0100
> +++ linux-2.6.11-work/drivers/net/Makefile 2005-03-17 12:32:16.000000000 +0100
> @@ -181,6 +181,7 @@
> obj-$(CONFIG_IBMVETH) += ibmveth.o
> obj-$(CONFIG_S2IO) += s2io.o
> obj-$(CONFIG_SMC91X) += smc91x.o
> +obj-$(CONFIG_DM9000) += dm9000.o
> obj-$(CONFIG_FEC_8XX) += fec_8xx/
>
> obj-$(CONFIG_ARM) += arm/
> diff -urN linux-2.6.11/drivers/net/dm9000.c linux-2.6.11-work/drivers/net/dm9000.c
> --- linux-2.6.11/drivers/net/dm9000.c 1970-01-01 01:00:00.000000000 +0100
> +++ linux-2.6.11-work/drivers/net/dm9000.c 2005-03-17 16:04:49.000000000 +0100
> @@ -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 <[email protected]>:
> + * Fixed phy reset.
> + * Added tx/rx 32 bit mode.
> + * Cleaned up for kernel merge.
> + *
> + * 03/03/2004 Sascha Hauer <[email protected]>
> + * Port to 2.6 kernel
> + *
> + * 24-Sep-2004 Ben Dooks <[email protected]>
> + * Cleanup of code to remove ifdefs
> + * Allowed platform device data to influence access width
> + * Reformatting areas of code
> + *
> + * 17-Mar-2005 Sascha Hauer <[email protected]>
> + * * 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");
> diff -urN linux-2.6.11/drivers/net/dm9000.h linux-2.6.11-work/drivers/net/dm9000.h
> --- linux-2.6.11/drivers/net/dm9000.h 1970-01-01 01:00:00.000000000 +0100
> +++ linux-2.6.11-work/drivers/net/dm9000.h 2005-03-17 15:59:43.000000000 +0100
> @@ -0,0 +1,135 @@
> +/*
> + * dm9000 Ethernet
> + */
> +
> +#ifndef _DM9000X_H_
> +#define _DM9000X_H_
> +
> +#define DM9000_ID 0x90000A46
> +
> +/* although the registers are 16 bit, they are 32-bit aligned.
> + */
> +
> +#define DM9000_NCR 0x00
> +#define DM9000_NSR 0x01
> +#define DM9000_TCR 0x02
> +#define DM9000_TSR1 0x03
> +#define DM9000_TSR2 0x04
> +#define DM9000_RCR 0x05
> +#define DM9000_RSR 0x06
> +#define DM9000_ROCR 0x07
> +#define DM9000_BPTR 0x08
> +#define DM9000_FCTR 0x09
> +#define DM9000_FCR 0x0A
> +#define DM9000_EPCR 0x0B
> +#define DM9000_EPAR 0x0C
> +#define DM9000_EPDRL 0x0D
> +#define DM9000_EPDRH 0x0E
> +#define DM9000_WCR 0x0F
> +
> +#define DM9000_PAR 0x10
> +#define DM9000_MAR 0x16
> +
> +#define DM9000_GPCR 0x1e
> +#define DM9000_GPR 0x1f
> +#define DM9000_TRPAL 0x22
> +#define DM9000_TRPAH 0x23
> +#define DM9000_RWPAL 0x24
> +#define DM9000_RWPAH 0x25
> +
> +#define DM9000_VIDL 0x28
> +#define DM9000_VIDH 0x29
> +#define DM9000_PIDL 0x2A
> +#define DM9000_PIDH 0x2B
> +
> +#define DM9000_CHIPR 0x2C
> +#define DM9000_SMCR 0x2F
> +
> +#define DM9000_MRCMDX 0xF0
> +#define DM9000_MRCMD 0xF2
> +#define DM9000_MRRL 0xF4
> +#define DM9000_MRRH 0xF5
> +#define DM9000_MWCMDX 0xF6
> +#define DM9000_MWCMD 0xF8
> +#define DM9000_MWRL 0xFA
> +#define DM9000_MWRH 0xFB
> +#define DM9000_TXPLL 0xFC
> +#define DM9000_TXPLH 0xFD
> +#define DM9000_ISR 0xFE
> +#define DM9000_IMR 0xFF
> +
> +#define NCR_EXT_PHY (1<<7)
> +#define NCR_WAKEEN (1<<6)
> +#define NCR_FCOL (1<<4)
> +#define NCR_FDX (1<<3)
> +#define NCR_LBK (3<<1)
> +#define NCR_RST (1<<0)
> +
> +#define NSR_SPEED (1<<7)
> +#define NSR_LINKST (1<<6)
> +#define NSR_WAKEST (1<<5)
> +#define NSR_TX2END (1<<3)
> +#define NSR_TX1END (1<<2)
> +#define NSR_RXOV (1<<1)
> +
> +#define TCR_TJDIS (1<<6)
> +#define TCR_EXCECM (1<<5)
> +#define TCR_PAD_DIS2 (1<<4)
> +#define TCR_CRC_DIS2 (1<<3)
> +#define TCR_PAD_DIS1 (1<<2)
> +#define TCR_CRC_DIS1 (1<<1)
> +#define TCR_TXREQ (1<<0)
> +
> +#define TSR_TJTO (1<<7)
> +#define TSR_LC (1<<6)
> +#define TSR_NC (1<<5)
> +#define TSR_LCOL (1<<4)
> +#define TSR_COL (1<<3)
> +#define TSR_EC (1<<2)
> +
> +#define RCR_WTDIS (1<<6)
> +#define RCR_DIS_LONG (1<<5)
> +#define RCR_DIS_CRC (1<<4)
> +#define RCR_ALL (1<<3)
> +#define RCR_RUNT (1<<2)
> +#define RCR_PRMSC (1<<1)
> +#define RCR_RXEN (1<<0)
> +
> +#define RSR_RF (1<<7)
> +#define RSR_MF (1<<6)
> +#define RSR_LCS (1<<5)
> +#define RSR_RWTO (1<<4)
> +#define RSR_PLE (1<<3)
> +#define RSR_AE (1<<2)
> +#define RSR_CE (1<<1)
> +#define RSR_FOE (1<<0)
> +
> +#define FCTR_HWOT(ot) (( ot & 0xf ) << 4 )
> +#define FCTR_LWOT(ot) ( ot & 0xf )
> +
> +#define IMR_PAR (1<<7)
> +#define IMR_ROOM (1<<3)
> +#define IMR_ROM (1<<2)
> +#define IMR_PTM (1<<1)
> +#define IMR_PRM (1<<0)
> +
> +#define ISR_ROOS (1<<3)
> +#define ISR_ROS (1<<2)
> +#define ISR_PTS (1<<1)
> +#define ISR_PRS (1<<0)
> +#define ISR_CLR_STATUS (ISR_ROOS | ISR_ROS | ISR_PTS | ISR_PRS)
> +
> +#define EPCR_REEP (1<<5)
> +#define EPCR_WEP (1<<4)
> +#define EPCR_EPOS (1<<3)
> +#define EPCR_ERPRR (1<<2)
> +#define EPCR_ERPRW (1<<1)
> +#define EPCR_ERRE (1<<0)
> +
> +#define GPCR_GEP_CNTL (1<<0)
> +
> +#define DM9000_PKT_RDY 0x01 /* Packet ready to receive */
> +#define DM9000_PKT_MAX 1536 /* Received packet max size */
> +
> +#endif /* _DM9000X_H_ */
> +
> diff -urN linux-2.6.11/include/linux/dm9000.h linux-2.6.11-work/include/linux/dm9000.h
> --- linux-2.6.11/include/linux/dm9000.h 1970-01-01 01:00:00.000000000 +0100
> +++ linux-2.6.11-work/include/linux/dm9000.h 2005-03-17 12:34:36.000000000 +0100
> @@ -0,0 +1,36 @@
> +/* include/linux/dm9000.h
> + *
> + * Copyright (c) 2004 Simtec Electronics
> + * Ben Dooks <[email protected]>
> + *
> + * Header file for dm9000 platform data
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> +*/
> +
> +#ifndef __DM9000_PLATFORM_DATA
> +#define __DM9000_PLATFORM_DATA __FILE__
> +
> +/* IO control flags */
> +
> +#define DM9000_PLATF_8BITONLY (0x0001)
> +#define DM9000_PLATF_16BITONLY (0x0002)
> +#define DM9000_PLATF_32BITONLY (0x0004)
> +
> +/* platfrom data for platfrom device structure's platfrom_data field */
> +
> +struct dm9000_plat_data {
> + unsigned int flags;
> +
> + /* allow replacement IO routines */
> +
> + void (*inblk)(void __iomem *reg, void *data, int len);
> + void (*outblk)(void __iomem *reg, void *data, int len);
> + void (*dumpblk)(void __iomem *reg, int len);
> +};
> +
> +#endif /* __DM9000_PLATFORM_DATA */
> +
>
> -
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> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
On Fri, Mar 18, 2005 at 08:41:52PM +0530, Hong Kong Phoey wrote:
> Sacrificing readibility a little bit, you could do something useful.
> Instead of those ugly switch statements you could define function
> pointer arrays and call appropriate function
>
> switch(foo) {
>
> case 1:
> f1();
> case2 :
> f2();
> };
>
> could well become
>
> void (*func)[] = { f1, f2 };
>
> func(i);
Ewww!
How about sticking with obvious readable code rather than trying to save
a couple of conditional branches. If it is an obvious good
optimization, let the compiler do it. of course if you ever needed to
pass different parameters to f1 and/or f2 it would have to be rewritten
back to the original again.
Len Sorensen
On Fri, Mar 18, 2005 at 10:25:54AM -0500, Lennart Sorensen wrote:
> On Fri, Mar 18, 2005 at 08:41:52PM +0530, Hong Kong Phoey wrote:
> > switch(foo) {
> >
> > case 1:
> > f1();
> > case2 :
> > f2();
> > };
> >
> > could well become
> >
> > void (*func)[] = { f1, f2 };
> >
> > func(i);
>
> Ewww!
My thoughts exactly...there might be a place for something like that,
but I don't think this is it...
John
--
John W. Linville
[email protected]
On Fri, 18 Mar 2005 10:25:54 -0500, Lennart Sorensen
<[email protected]> wrote:
> On Fri, Mar 18, 2005 at 08:41:52PM +0530, Hong Kong Phoey wrote:
> > Sacrificing readibility a little bit, you could do something useful.
> > Instead of those ugly switch statements you could define function
> > pointer arrays and call appropriate function
> >
> > switch(foo) {
> >
> > case 1:
> > f1();
> > case2 :
> > f2();
> > };
> >
> > could well become
> >
> > void (*func)[] = { f1, f2 };
> >
> > func(i);
>
> Ewww!
>
> How about sticking with obvious readable code rather than trying to save
> a couple of conditional branches.
On top of that I highly doibt that setting up stack frame for an
indirect function call is less expensive than a conditional branch.
--
Dmitry
On Fri, 18 Mar 2005 [email protected] wrote:
> On Fri, Mar 18, 2005 at 08:41:52PM +0530, Hong Kong Phoey wrote:
>> Sacrificing readibility a little bit, you could do something useful.
>> Instead of those ugly switch statements you could define function
>> pointer arrays and call appropriate function
>>
>> switch(foo) {
>>
>> case 1:
>> f1();
>> case2 :
>> f2();
>> };
>>
>> could well become
>>
>> void (*func)[] = { f1, f2 };
>>
>> func(i);
>
> Ewww!
>
> How about sticking with obvious readable code rather than trying to save
> a couple of conditional branches. If it is an obvious good
> optimization, let the compiler do it. of course if you ever needed to
> pass different parameters to f1 and/or f2 it would have to be rewritten
> back to the original again.
>
> Len Sorensen
Also, those "ugly" switch-statements are not ugly and are
most efficient if the case(s) are enumerated types in
automatically-generated incrementing order. I see a lot
of values assigned to enumerated types which destroys their
usefulness. They might just as well be "#defined" values
if you do this.
Code that does:
enum {
one,
two,
three };
switch(val)
{
case one:
case two:
case three:
....
}
... calculates the offset of each of those case(s) and branches
directly.
movl (val), %ebx
shll $2, %ebx # Size of table entries
jmp *table(%ebx) # Table contains a list of switch offsets
If somebody does:
enum {
one = 1234,
two = 4321,
three = 8765
};
.. no such calculation is possible and the compiler output must
devolve to:
movl (val), %eax
cmpl $1235, %eax
jz one
cmpl $4321, %eax
jz two
cmpl $8765, %eax
jz three
jmp none
one:
.... a bunch of comparisons. So, you make switches efficient
by using enumerated types without fixed values. Of course
some switches, such as found in ioctl() function numbers
must be hard-coded because they must correspond to whatever
the 'C' runtime library and its headers expect. In this
case, you can make them efficient by having no holes
in the allocated numbers and putting the cases in sorted
order. This gives the 'C' compiler a chance to optimize.
Cheers,
Dick Johnson
Penguin : Linux version 2.6.11 on an i686 machine (5537.79 BogoMips).
Notice : All mail here is now cached for review by Dictator Bush.
98.36% of all statistics are fiction.
On Gwe, 2005-03-18 at 13:31, Sascha Hauer wrote:
> Hello all,
>
> 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.
Unless I'm missing something its just yet another NE2000 (ie 8390) clone
and can used the 8390 core or maybe even ne2k-pci ?
On Fri, Mar 18, 2005 at 04:21:30PM +0000, Alan Cox wrote:
> On Gwe, 2005-03-18 at 13:31, Sascha Hauer wrote:
> > Hello all,
> >
> > 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.
>
> Unless I'm missing something its just yet another NE2000 (ie 8390) clone
> and can used the 8390 core or maybe even ne2k-pci ?
Yes, you are missing something. The dm9000 is definetly
not an ne2k compatible, for a start it only uses two ports
(address and data), manages it's own transmit/receive queues, etc.
As the person who did the updates to Sacha's
original driver port, he should have really checked
with me for up-to-date version first, and to collect
a Signed-off-by: line.
Signed-off-by: Ben Dooks <[email protected]>
--
Ben ([email protected], http://www.fluff.org/)
'a smiley only costs 4 bytes'
On Fri, Mar 18, 2005 at 04:58:17PM +0000, Ben Dooks wrote:
>
> As the person who did the updates to Sacha's
> original driver port, he should have really checked
> with me for up-to-date version first, and to collect
> a Signed-off-by: line.
>
Sorry, Ben. Of course I should have asked you first, but I had this
patch lying around for too long, and I felt I had to do something.
Do you still have updates to the driver? Then we should work them in
before we go ahead.
Sascha