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Diffstat (limited to 'cleopatre/linux-2.6.25.10-spc300/drivers/net/dm9000.c')
-rw-r--r--cleopatre/linux-2.6.25.10-spc300/drivers/net/dm9000.c1420
1 files changed, 1420 insertions, 0 deletions
diff --git a/cleopatre/linux-2.6.25.10-spc300/drivers/net/dm9000.c b/cleopatre/linux-2.6.25.10-spc300/drivers/net/dm9000.c
new file mode 100644
index 0000000000..d63cc93f05
--- /dev/null
+++ b/cleopatre/linux-2.6.25.10-spc300/drivers/net/dm9000.c
@@ -0,0 +1,1420 @@
+/*
+ * Davicom DM9000 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.
+ *
+ * Additional updates, Copyright:
+ * Ben Dooks <ben@simtec.co.uk>
+ * Sascha Hauer <s.hauer@pengutronix.de>
+ */
+
+#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/spinlock.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/dm9000.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/irq.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 CARDNAME "dm9000"
+#define PFX CARDNAME ": "
+#define DRV_VERSION "1.30"
+
+#ifdef CONFIG_BLACKFIN
+#define readsb insb
+#define readsw insw
+#define readsl insl
+#define writesb outsb
+#define writesw outsw
+#define writesl outsl
+#define DEFAULT_TRIGGER IRQF_TRIGGER_HIGH
+#else
+#define DEFAULT_TRIGGER (0)
+#endif
+
+/*
+ * Transmit timeout, default 5 seconds.
+ */
+static int watchdog = 5000;
+module_param(watchdog, int, 0400);
+MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
+
+/* DM9000 register address locking.
+ *
+ * The DM9000 uses an address register to control where data written
+ * to the data register goes. This means that the address register
+ * must be preserved over interrupts or similar calls.
+ *
+ * During interrupt and other critical calls, a spinlock is used to
+ * protect the system, but the calls themselves save the address
+ * in the address register in case they are interrupting another
+ * access to the device.
+ *
+ * For general accesses a lock is provided so that calls which are
+ * allowed to sleep are serialised so that the address register does
+ * not need to be saved. This lock also serves to serialise access
+ * to the EEPROM and PHY access registers which are shared between
+ * these two devices.
+ */
+
+/* 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;
+ unsigned int flags;
+ unsigned int in_suspend :1;
+
+ int debug_level;
+
+ 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 device *dev; /* parent device */
+
+ 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 mutex addr_lock; /* phy and eeprom access lock */
+
+ spinlock_t lock;
+
+ struct mii_if_info mii;
+ u32 msg_enable;
+} board_info_t;
+
+/* debug code */
+
+#define dm9000_dbg(db, lev, msg...) do { \
+ if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
+ (lev) < db->debug_level) { \
+ dev_dbg(db->dev, msg); \
+ } \
+} while (0)
+
+static inline board_info_t *to_dm9000_board(struct net_device *dev)
+{
+ return dev->priv;
+}
+
+/* function declaration ------------------------------------- */
+static int dm9000_probe(struct platform_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_ioctl(struct net_device *dev, struct ifreq *req, int cmd);
+
+static void dm9000_init_dm9000(struct net_device *);
+
+static irqreturn_t dm9000_interrupt(int, void *);
+
+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 void dm9000_read_eeprom(board_info_t *, int addr, u8 *to);
+static void dm9000_write_eeprom(board_info_t *, int addr, u8 *dp);
+static void dm9000_rx(struct net_device *);
+static void dm9000_hash_table(struct net_device *);
+
+/* DM9000 network board routine ---------------------------- */
+
+static void
+dm9000_reset(board_info_t * db)
+{
+ dev_dbg(db->dev, "resetting device\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);
+}
+
+
+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 3:
+ dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
+ case 2:
+ 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);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ *Used by netconsole
+ */
+static void dm9000_poll_controller(struct net_device *dev)
+{
+ disable_irq(dev->irq);
+ dm9000_interrupt(dev->irq,dev);
+ enable_irq(dev->irq);
+}
+#endif
+
+static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL);
+}
+
+/* ethtool ops */
+
+static void dm9000_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+
+ strcpy(info->driver, CARDNAME);
+ strcpy(info->version, DRV_VERSION);
+ strcpy(info->bus_info, to_platform_device(dm->dev)->name);
+}
+
+static u32 dm9000_get_msglevel(struct net_device *dev)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+
+ return dm->msg_enable;
+}
+
+static void dm9000_set_msglevel(struct net_device *dev, u32 value)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+
+ dm->msg_enable = value;
+}
+
+static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+
+ mii_ethtool_gset(&dm->mii, cmd);
+ return 0;
+}
+
+static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+
+ return mii_ethtool_sset(&dm->mii, cmd);
+}
+
+static int dm9000_nway_reset(struct net_device *dev)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+ return mii_nway_restart(&dm->mii);
+}
+
+static u32 dm9000_get_link(struct net_device *dev)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+ return mii_link_ok(&dm->mii);
+}
+
+#define DM_EEPROM_MAGIC (0x444D394B)
+
+static int dm9000_get_eeprom_len(struct net_device *dev)
+{
+ return 128;
+}
+
+static int dm9000_get_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+ int offset = ee->offset;
+ int len = ee->len;
+ int i;
+
+ /* EEPROM access is aligned to two bytes */
+
+ if ((len & 1) != 0 || (offset & 1) != 0)
+ return -EINVAL;
+
+ if (dm->flags & DM9000_PLATF_NO_EEPROM)
+ return -ENOENT;
+
+ ee->magic = DM_EEPROM_MAGIC;
+
+ for (i = 0; i < len; i += 2)
+ dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
+
+ return 0;
+}
+
+static int dm9000_set_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ board_info_t *dm = to_dm9000_board(dev);
+ int offset = ee->offset;
+ int len = ee->len;
+ int i;
+
+ /* EEPROM access is aligned to two bytes */
+
+ if ((len & 1) != 0 || (offset & 1) != 0)
+ return -EINVAL;
+
+ if (dm->flags & DM9000_PLATF_NO_EEPROM)
+ return -ENOENT;
+
+ if (ee->magic != DM_EEPROM_MAGIC)
+ return -EINVAL;
+
+ for (i = 0; i < len; i += 2)
+ dm9000_write_eeprom(dm, (offset + i) / 2, data + i);
+
+ return 0;
+}
+
+static const struct ethtool_ops dm9000_ethtool_ops = {
+ .get_drvinfo = dm9000_get_drvinfo,
+ .get_settings = dm9000_get_settings,
+ .set_settings = dm9000_set_settings,
+ .get_msglevel = dm9000_get_msglevel,
+ .set_msglevel = dm9000_set_msglevel,
+ .nway_reset = dm9000_nway_reset,
+ .get_link = dm9000_get_link,
+ .get_eeprom_len = dm9000_get_eeprom_len,
+ .get_eeprom = dm9000_get_eeprom,
+ .set_eeprom = dm9000_set_eeprom,
+};
+
+
+/* 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_req != NULL) {
+ release_resource(db->addr_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 platform_device *pdev)
+{
+ struct dm9000_plat_data *pdata = pdev->dev.platform_data;
+ struct board_info *db; /* Point a board information structure */
+ struct net_device *ndev;
+ const unsigned char *mac_src;
+ unsigned long base;
+ int ret = 0;
+ int iosize;
+ int i;
+ u32 id_val;
+
+ /* Init network device */
+ ndev = alloc_etherdev(sizeof (struct board_info));
+ if (!ndev) {
+ dev_err(&pdev->dev, "could not allocate device.\n");
+ return -ENOMEM;
+ }
+
+ SET_NETDEV_DEV(ndev, &pdev->dev);
+
+ dev_dbg(&pdev->dev, "dm9000_probe()");
+
+ /* setup board info structure */
+ db = (struct board_info *) ndev->priv;
+ memset(db, 0, sizeof (*db));
+
+ db->dev = &pdev->dev;
+
+ spin_lock_init(&db->lock);
+ mutex_init(&db->addr_lock);
+
+ if (pdev->num_resources < 2) {
+ ret = -ENODEV;
+ goto out;
+ } else if (pdev->num_resources == 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 __iomem *)base;
+ db->io_data = (void __iomem *)(base + 4);
+
+ /* ensure at least we have a default set of IO routines */
+ dm9000_set_io(db, 2);
+
+ } else {
+ 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 ||
+ db->irq_res == NULL) {
+ dev_err(db->dev, "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) {
+ dev_err(db->dev, "cannot claim address reg area\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ db->io_addr = ioremap(db->addr_res->start, i);
+
+ if (db->io_addr == NULL) {
+ dev_err(db->dev, "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) {
+ dev_err(db->dev, "cannot claim data reg area\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ db->io_data = ioremap(db->data_res->start, iosize);
+
+ if (db->io_data == NULL) {
+ dev_err(db->dev,"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;
+
+ db->flags = pdata->flags;
+ }
+
+ dm9000_reset(db);
+
+ /* try two times, DM9000 sometimes gets the first read wrong */
+ for (i = 0; i < 8; 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;
+ dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
+ }
+
+ if (id_val != DM9000_ID) {
+ dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
+ ret = -ENODEV;
+ goto out;
+ }
+
+ /* 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->set_multicast_list = &dm9000_hash_table;
+ ndev->ethtool_ops = &dm9000_ethtool_ops;
+ ndev->do_ioctl = &dm9000_ioctl;
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ ndev->poll_controller = &dm9000_poll_controller;
+#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;
+
+ mac_src = "eeprom";
+
+ /* try reading the node address from the attached EEPROM */
+ for (i = 0; i < 6; i += 2)
+ dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
+
+ if (!is_valid_ether_addr(ndev->dev_addr)) {
+ /* try reading from mac */
+
+ mac_src = "chip";
+ for (i = 0; i < 6; i++)
+ ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
+ }
+
+ if (!is_valid_ether_addr(ndev->dev_addr))
+ dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
+ "set using ifconfig\n", ndev->name);
+
+ platform_set_drvdata(pdev, ndev);
+ ret = register_netdev(ndev);
+
+ if (ret == 0) {
+ DECLARE_MAC_BUF(mac);
+ printk("%s: dm9000 at %p,%p IRQ %d MAC: %s (%s)\n",
+ ndev->name, db->io_addr, db->io_data, ndev->irq,
+ print_mac(mac, ndev->dev_addr), mac_src);
+ }
+ return 0;
+
+out:
+ dev_err(db->dev, "not found (%d).\n", ret);
+
+ dm9000_release_board(pdev, db);
+ free_netdev(ndev);
+
+ return ret;
+}
+
+/*
+ * Open the interface.
+ * The interface is opened whenever "ifconfig" actives it.
+ */
+static int
+dm9000_open(struct net_device *dev)
+{
+ board_info_t *db = (board_info_t *) dev->priv;
+ unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
+
+ if (netif_msg_ifup(db))
+ dev_dbg(db->dev, "enabling %s\n", dev->name);
+
+ /* If there is no IRQ type specified, default to something that
+ * may work, and tell the user that this is a problem */
+
+ if (irqflags == IRQF_TRIGGER_NONE) {
+ dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
+ irqflags = DEFAULT_TRIGGER;
+ }
+
+ irqflags |= IRQF_SHARED;
+
+ if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
+ return -EAGAIN;
+
+ /* Initialize DM9000 board */
+ dm9000_reset(db);
+ dm9000_init_dm9000(dev);
+
+ /* Init driver variable */
+ db->dbug_cnt = 0;
+
+ 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;
+
+ dm9000_dbg(db, 1, "entering %s\n", __func__);
+
+ /* 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 */
+
+ if (db->flags & DM9000_PLATF_EXT_PHY)
+ iow(db, DM9000_NCR, NCR_EXT_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);
+
+ /* Enable TX/RX interrupt mask */
+ iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
+
+ /* Init Driver variable */
+ db->tx_pkt_cnt = 0;
+ db->queue_pkt_len = 0;
+ dev->trans_start = 0;
+}
+
+/*
+ * Hardware start transmission.
+ * Send a packet to media from the upper layer.
+ */
+static int
+dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ unsigned long flags;
+ board_info_t *db = (board_info_t *) dev->priv;
+
+ dm9000_dbg(db, 3, "%s:\n", __func__);
+
+ if (db->tx_pkt_cnt > 1)
+ return 1;
+
+ spin_lock_irqsave(&db->lock, flags);
+
+ /* Move data to DM9000 TX RAM */
+ writeb(DM9000_MWCMD, db->io_addr);
+
+ (db->outblk)(db->io_data, skb->data, skb->len);
+ dev->stats.tx_bytes += skb->len;
+
+ db->tx_pkt_cnt++;
+ /* TX control: First packet immediately send, second packet queue */
+ if (db->tx_pkt_cnt == 1) {
+ /* Set TX length to DM9000 */
+ iow(db, DM9000_TXPLL, skb->len);
+ iow(db, DM9000_TXPLH, skb->len >> 8);
+
+ /* Issue TX polling command */
+ iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
+
+ dev->trans_start = jiffies; /* save the time stamp */
+ } else {
+ /* Second packet */
+ db->queue_pkt_len = skb->len;
+ netif_stop_queue(dev);
+ }
+
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ /* free this SKB */
+ dev_kfree_skb(skb);
+
+ return 0;
+}
+
+static void
+dm9000_shutdown(struct net_device *dev)
+{
+ board_info_t *db = (board_info_t *) dev->priv;
+
+ /* RESET device */
+ dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
+ iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
+ iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
+ iow(db, DM9000_RCR, 0x00); /* Disable RX */
+}
+
+/*
+ * Stop the interface.
+ * The interface is stopped when it is brought.
+ */
+static int
+dm9000_stop(struct net_device *ndev)
+{
+ board_info_t *db = (board_info_t *) ndev->priv;
+
+ if (netif_msg_ifdown(db))
+ dev_dbg(db->dev, "shutting down %s\n", ndev->name);
+
+ netif_stop_queue(ndev);
+ netif_carrier_off(ndev);
+
+ /* free interrupt */
+ free_irq(ndev->irq, ndev);
+
+ dm9000_shutdown(ndev);
+
+ return 0;
+}
+
+/*
+ * DM9000 interrupt handler
+ * receive the packet to upper layer, free the transmitted packet
+ */
+
+static void
+dm9000_tx_done(struct net_device *dev, board_info_t * db)
+{
+ int tx_status = ior(db, DM9000_NSR); /* Got TX status */
+
+ if (tx_status & (NSR_TX2END | NSR_TX1END)) {
+ /* One packet sent complete */
+ db->tx_pkt_cnt--;
+ dev->stats.tx_packets++;
+
+ if (netif_msg_tx_done(db))
+ dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status);
+
+ /* Queue packet check & send */
+ if (db->tx_pkt_cnt > 0) {
+ iow(db, DM9000_TXPLL, db->queue_pkt_len);
+ iow(db, DM9000_TXPLH, db->queue_pkt_len >> 8);
+ iow(db, DM9000_TCR, TCR_TXREQ);
+ dev->trans_start = jiffies;
+ }
+ netif_wake_queue(dev);
+ }
+}
+
+static irqreturn_t
+dm9000_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ board_info_t *db = (board_info_t *) dev->priv;
+ int int_status;
+ u8 reg_save;
+
+ dm9000_dbg(db, 3, "entering %s\n", __func__);
+
+ /* A real interrupt coming */
+
+ 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 */
+
+ if (netif_msg_intr(db))
+ dev_dbg(db->dev, "interrupt status %02x\n", int_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;
+}
+
+struct dm9000_rxhdr {
+ u8 RxPktReady;
+ u8 RxStatus;
+ __le16 RxLen;
+} __attribute__((__packed__));
+
+/*
+ * Received a packet and pass to upper layer
+ */
+static void
+dm9000_rx(struct net_device *dev)
+{
+ board_info_t *db = (board_info_t *) dev->priv;
+ struct dm9000_rxhdr rxhdr;
+ struct sk_buff *skb;
+ u8 rxbyte, *rdptr;
+ bool GoodPacket;
+ int RxLen;
+
+ /* Check packet ready or not */
+ do {
+ ior(db, DM9000_MRCMDX); /* Dummy read */
+
+ /* Get most updated data */
+ rxbyte = readb(db->io_data);
+
+ /* Status check: this byte must be 0 or 1 */
+ if (rxbyte > DM9000_PKT_RDY) {
+ dev_warn(db->dev, "status check fail: %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 = le16_to_cpu(rxhdr.RxLen);
+
+ if (netif_msg_rx_status(db))
+ dev_dbg(db->dev, "RX: status %02x, length %04x\n",
+ rxhdr.RxStatus, RxLen);
+
+ /* Packet Status check */
+ if (RxLen < 0x40) {
+ GoodPacket = false;
+ if (netif_msg_rx_err(db))
+ dev_dbg(db->dev, "RX: Bad Packet (runt)\n");
+ }
+
+ if (RxLen > DM9000_PKT_MAX) {
+ dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
+ }
+
+ if (rxhdr.RxStatus & 0xbf) {
+ GoodPacket = false;
+ if (rxhdr.RxStatus & 0x01) {
+ if (netif_msg_rx_err(db))
+ dev_dbg(db->dev, "fifo error\n");
+ dev->stats.rx_fifo_errors++;
+ }
+ if (rxhdr.RxStatus & 0x02) {
+ if (netif_msg_rx_err(db))
+ dev_dbg(db->dev, "crc error\n");
+ dev->stats.rx_crc_errors++;
+ }
+ if (rxhdr.RxStatus & 0x80) {
+ if (netif_msg_rx_err(db))
+ dev_dbg(db->dev, "length error\n");
+ dev->stats.rx_length_errors++;
+ }
+ }
+
+ /* Move data from DM9000 */
+ if (GoodPacket
+ && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
+ skb_reserve(skb, 2);
+ rdptr = (u8 *) skb_put(skb, RxLen - 4);
+
+ /* Read received packet from RX SRAM */
+
+ (db->inblk)(db->io_data, rdptr, RxLen);
+ dev->stats.rx_bytes += RxLen;
+
+ /* Pass to upper layer */
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+
+ } else {
+ /* need to dump the packet's data */
+
+ (db->dumpblk)(db->io_data, RxLen);
+ }
+ } while (rxbyte == DM9000_PKT_RDY);
+}
+
+static unsigned int
+dm9000_read_locked(board_info_t *db, int reg)
+{
+ unsigned long flags;
+ unsigned int ret;
+
+ spin_lock_irqsave(&db->lock, flags);
+ ret = ior(db, reg);
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ return ret;
+}
+
+static int dm9000_wait_eeprom(board_info_t *db)
+{
+ unsigned int status;
+ int timeout = 8; /* wait max 8msec */
+
+ /* The DM9000 data sheets say we should be able to
+ * poll the ERRE bit in EPCR to wait for the EEPROM
+ * operation. From testing several chips, this bit
+ * does not seem to work.
+ *
+ * We attempt to use the bit, but fall back to the
+ * timeout (which is why we do not return an error
+ * on expiry) to say that the EEPROM operation has
+ * completed.
+ */
+
+ while (1) {
+ status = dm9000_read_locked(db, DM9000_EPCR);
+
+ if ((status & EPCR_ERRE) == 0)
+ break;
+
+ if (timeout-- < 0) {
+ dev_dbg(db->dev, "timeout waiting EEPROM\n");
+ break;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Read a word data from EEPROM
+ */
+static void
+dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
+{
+ unsigned long flags;
+
+ if (db->flags & DM9000_PLATF_NO_EEPROM) {
+ to[0] = 0xff;
+ to[1] = 0xff;
+ return;
+ }
+
+ mutex_lock(&db->addr_lock);
+
+ spin_lock_irqsave(&db->lock, flags);
+
+ iow(db, DM9000_EPAR, offset);
+ iow(db, DM9000_EPCR, EPCR_ERPRR);
+
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ dm9000_wait_eeprom(db);
+
+ /* delay for at-least 150uS */
+ msleep(1);
+
+ spin_lock_irqsave(&db->lock, flags);
+
+ iow(db, DM9000_EPCR, 0x0);
+
+ to[0] = ior(db, DM9000_EPDRL);
+ to[1] = ior(db, DM9000_EPDRH);
+
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ mutex_unlock(&db->addr_lock);
+}
+
+/*
+ * Write a word data to SROM
+ */
+static void
+dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
+{
+ unsigned long flags;
+
+ if (db->flags & DM9000_PLATF_NO_EEPROM)
+ return;
+
+ mutex_lock(&db->addr_lock);
+
+ spin_lock_irqsave(&db->lock, flags);
+ iow(db, DM9000_EPAR, offset);
+ iow(db, DM9000_EPDRH, data[1]);
+ iow(db, DM9000_EPDRL, data[0]);
+ iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ dm9000_wait_eeprom(db);
+
+ mdelay(1); /* wait at least 150uS to clear */
+
+ spin_lock_irqsave(&db->lock, flags);
+ iow(db, DM9000_EPCR, 0);
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ mutex_unlock(&db->addr_lock);
+}
+
+/*
+ * 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;
+ int i, oft;
+ u32 hash_val;
+ u16 hash_table[4];
+ u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
+ unsigned long flags;
+
+ dm9000_dbg(db, 1, "entering %s\n", __func__);
+
+ spin_lock_irqsave(&db->lock, flags);
+
+ for (i = 0, oft = DM9000_PAR; 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;
+
+ if (dev->flags & IFF_PROMISC)
+ rcr |= RCR_PRMSC;
+
+ if (dev->flags & IFF_ALLMULTI)
+ rcr |= RCR_ALL;
+
+ /* the multicast address in Hash Table : 64 bits */
+ for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
+ hash_val = ether_crc_le(6, mcptr->dmi_addr) & 0x3f;
+ hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
+ }
+
+ /* Write the hash table to MAC MD table */
+ for (i = 0, oft = DM9000_MAR; i < 4; i++) {
+ iow(db, oft++, hash_table[i]);
+ iow(db, oft++, hash_table[i] >> 8);
+ }
+
+ iow(db, DM9000_RCR, rcr);
+ spin_unlock_irqrestore(&db->lock, flags);
+}
+
+
+/*
+ * Sleep, either by using msleep() or if we are suspending, then
+ * use mdelay() to sleep.
+ */
+static void dm9000_msleep(board_info_t *db, unsigned int ms)
+{
+ if (db->in_suspend)
+ mdelay(ms);
+ else
+ msleep(ms);
+}
+
+/*
+ * Read a word from phyxcer
+ */
+static int
+dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
+{
+ board_info_t *db = (board_info_t *) dev->priv;
+ unsigned long flags;
+ unsigned int reg_save;
+ int ret;
+
+ mutex_lock(&db->addr_lock);
+
+ spin_lock_irqsave(&db->lock,flags);
+
+ /* Save previous register address */
+ reg_save = readb(db->io_addr);
+
+ /* Fill the phyxcer register into REG_0C */
+ iow(db, DM9000_EPAR, DM9000_PHY | reg);
+
+ iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
+
+ writeb(reg_save, db->io_addr);
+ spin_unlock_irqrestore(&db->lock,flags);
+
+ dm9000_msleep(db, 1); /* Wait read complete */
+
+ spin_lock_irqsave(&db->lock,flags);
+ reg_save = readb(db->io_addr);
+
+ iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
+
+ /* The read data keeps on REG_0D & REG_0E */
+ ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
+
+ /* restore the previous address */
+ writeb(reg_save, db->io_addr);
+ spin_unlock_irqrestore(&db->lock,flags);
+
+ mutex_unlock(&db->addr_lock);
+ return ret;
+}
+
+/*
+ * Write a word to phyxcer
+ */
+static void
+dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
+{
+ board_info_t *db = (board_info_t *) dev->priv;
+ unsigned long flags;
+ unsigned long reg_save;
+
+ mutex_lock(&db->addr_lock);
+
+ spin_lock_irqsave(&db->lock,flags);
+
+ /* Save previous register address */
+ reg_save = readb(db->io_addr);
+
+ /* Fill the phyxcer register into REG_0C */
+ iow(db, DM9000_EPAR, DM9000_PHY | reg);
+
+ /* Fill the written data into REG_0D & REG_0E */
+ iow(db, DM9000_EPDRL, value);
+ iow(db, DM9000_EPDRH, value >> 8);
+
+ iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
+
+ writeb(reg_save, db->io_addr);
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ dm9000_msleep(db, 1); /* Wait write complete */
+
+ spin_lock_irqsave(&db->lock,flags);
+ reg_save = readb(db->io_addr);
+
+ iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
+
+ /* restore the previous address */
+ writeb(reg_save, db->io_addr);
+
+ spin_unlock_irqrestore(&db->lock, flags);
+ mutex_unlock(&db->addr_lock);
+}
+
+static int
+dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct net_device *ndev = platform_get_drvdata(dev);
+ board_info_t *db;
+
+ if (ndev) {
+ db = (board_info_t *) ndev->priv;
+ db->in_suspend = 1;
+
+ if (netif_running(ndev)) {
+ netif_device_detach(ndev);
+ dm9000_shutdown(ndev);
+ }
+ }
+ return 0;
+}
+
+static int
+dm9000_drv_resume(struct platform_device *dev)
+{
+ struct net_device *ndev = platform_get_drvdata(dev);
+ board_info_t *db = (board_info_t *) ndev->priv;
+
+ if (ndev) {
+
+ if (netif_running(ndev)) {
+ dm9000_reset(db);
+ dm9000_init_dm9000(ndev);
+
+ netif_device_attach(ndev);
+ }
+
+ db->in_suspend = 0;
+ }
+ return 0;
+}
+
+static int
+dm9000_drv_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ unregister_netdev(ndev);
+ dm9000_release_board(pdev, (board_info_t *) ndev->priv);
+ free_netdev(ndev); /* free device structure */
+
+ dev_dbg(&pdev->dev, "released and freed device\n");
+ return 0;
+}
+
+static struct platform_driver dm9000_driver = {
+ .driver = {
+ .name = "dm9000",
+ .owner = THIS_MODULE,
+ },
+ .probe = dm9000_probe,
+ .remove = dm9000_drv_remove,
+ .suspend = dm9000_drv_suspend,
+ .resume = dm9000_drv_resume,
+};
+
+static int __init
+dm9000_init(void)
+{
+ printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);
+
+ return platform_driver_register(&dm9000_driver); /* search board and register */
+}
+
+static void __exit
+dm9000_cleanup(void)
+{
+ platform_driver_unregister(&dm9000_driver);
+}
+
+module_init(dm9000_init);
+module_exit(dm9000_cleanup);
+
+MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
+MODULE_DESCRIPTION("Davicom DM9000 network driver");
+MODULE_LICENSE("GPL");