--- /dev/null
+/*
+ * 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/interrupt.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/ethtool.h>
+#include <linux/dm9000.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.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 DRV_VERSION "1.31"
+
+/*
+ * Transmit timeout, default 5 seconds.
+ */
+static int watchdog = 5000;
+module_param(watchdog, int, 0400);
+MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
+
+/*
+ * Debug messages level
+ */
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "dm9000 debug level (0-4)");
+
+/* 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.
+ */
+
+/* The driver supports the original DM9000E, and now the two newer
+ * devices, DM9000A and DM9000B.
+ */
+
+enum dm9000_type {
+ TYPE_DM9000E, /* original DM9000 */
+ TYPE_DM9000A,
+ TYPE_DM9000B
+};
+
+/* Structure/enum declaration ------------------------------- */
+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 queue_ip_summed;
+ u16 dbug_cnt;
+ u8 io_mode; /* 0:word, 2:byte */
+ u8 phy_addr;
+ u8 imr_all;
+
+ unsigned int flags;
+ unsigned int in_timeout:1;
+ unsigned int in_suspend:1;
+ unsigned int wake_supported:1;
+
+ enum dm9000_type type;
+
+ 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;
+
+ int irq_wake;
+
+ struct mutex addr_lock; /* phy and eeprom access lock */
+
+ struct delayed_work phy_poll;
+ struct net_device *ndev;
+
+ spinlock_t lock;
+
+ struct mii_if_info mii;
+ u32 msg_enable;
+ u32 wake_state;
+
+ int ip_summed;
+};
+
+/* debug code */
+
+#define dm9000_dbg(db, lev, msg...) do { \
+ if ((lev) < debug) { \
+ dev_dbg(db->dev, msg); \
+ } \
+} while (0)
+
+static inline struct board_info *to_dm9000_board(struct net_device *dev)
+{
+ return netdev_priv(dev);
+}
+
+/* DM9000 network board routine ---------------------------- */
+
+/*
+ * Read a byte from I/O port
+ */
+static u8
+ior(struct board_info *db, int reg)
+{
+ writeb(reg, db->io_addr);
+ return readb(db->io_data);
+}
+
+/*
+ * Write a byte to I/O port
+ */
+
+static void
+iow(struct board_info *db, int reg, int value)
+{
+ writeb(reg, db->io_addr);
+ writeb(value, db->io_data);
+}
+
+static void
+dm9000_reset(struct board_info *db)
+{
+ dev_dbg(db->dev, "resetting device\n");
+
+ /* Reset DM9000, see DM9000 Application Notes V1.22 Jun 11, 2004 page 29
+ * The essential point is that we have to do a double reset, and the
+ * instruction is to set LBK into MAC internal loopback mode.
+ */
+ iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK);
+ udelay(100); /* Application note says at least 20 us */
+ if (ior(db, DM9000_NCR) & 1)
+ dev_err(db->dev, "dm9000 did not respond to first reset\n");
+
+ iow(db, DM9000_NCR, 0);
+ iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK);
+ udelay(100);
+ if (ior(db, DM9000_NCR) & 1)
+ dev_err(db->dev, "dm9000 did not respond to second reset\n");
+}
+
+/* routines for sending block to chip */
+
+static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
+{
+ iowrite8_rep(reg, data, count);
+}
+
+static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
+{
+ iowrite16_rep(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
+{
+ iowrite32_rep(reg, data, (count+3) >> 2);
+}
+
+/* input block from chip to memory */
+
+static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
+{
+ ioread8_rep(reg, data, count);
+}
+
+
+static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
+{
+ ioread16_rep(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
+{
+ ioread32_rep(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);
+}
+
+/*
+ * Sleep, either by using msleep() or if we are suspending, then
+ * use mdelay() to sleep.
+ */
+static void dm9000_msleep(struct board_info *db, unsigned int ms)
+{
+ if (db->in_suspend || db->in_timeout)
+ 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)
+{
+ struct board_info *db = netdev_priv(dev);
+ 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);
+
+ /* Issue phyxcer read command */
+ iow(db, DM9000_EPCR, EPCR_ERPRR | EPCR_EPOS);
+
+ 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);
+
+ dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret);
+ return ret;
+}
+
+/* Write a word to phyxcer */
+static void
+dm9000_phy_write(struct net_device *dev,
+ int phyaddr_unused, int reg, int value)
+{
+ struct board_info *db = netdev_priv(dev);
+ unsigned long flags;
+ unsigned long reg_save;
+
+ dm9000_dbg(db, 5, "phy_write[%02x] = %04x\n", reg, value);
+ if (!db->in_timeout)
+ 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);
+
+ /* Issue phyxcer write command */
+ iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW);
+
+ 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);
+ if (!db->in_timeout)
+ mutex_unlock(&db->addr_lock);
+}
+
+/* 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;
+ }
+}
+
+static void dm9000_schedule_poll(struct board_info *db)
+{
+ if (db->type == TYPE_DM9000E)
+ schedule_delayed_work(&db->phy_poll, HZ * 2);
+}
+
+static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL);
+}
+
+static unsigned int
+dm9000_read_locked(struct board_info *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(struct board_info *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;
+
+ msleep(1);
+
+ 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(struct board_info *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(struct board_info *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);
+}
+
+/* ethtool ops */
+
+static void dm9000_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+
+ strlcpy(info->driver, CARDNAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ strlcpy(info->bus_info, to_platform_device(dm->dev)->name,
+ sizeof(info->bus_info));
+}
+
+static u32 dm9000_get_msglevel(struct net_device *dev)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+
+ return dm->msg_enable;
+}
+
+static void dm9000_set_msglevel(struct net_device *dev, u32 value)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+
+ dm->msg_enable = value;
+}
+
+static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct board_info *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)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+
+ return mii_ethtool_sset(&dm->mii, cmd);
+}
+
+static int dm9000_nway_reset(struct net_device *dev)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+ return mii_nway_restart(&dm->mii);
+}
+
+static int dm9000_set_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+ netdev_features_t changed = dev->features ^ features;
+ unsigned long flags;
+
+ if (!(changed & NETIF_F_RXCSUM))
+ return 0;
+
+ spin_lock_irqsave(&dm->lock, flags);
+ iow(dm, DM9000_RCSR, (features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);
+ spin_unlock_irqrestore(&dm->lock, flags);
+
+ return 0;
+}
+
+static u32 dm9000_get_link(struct net_device *dev)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+ u32 ret;
+
+ if (dm->flags & DM9000_PLATF_EXT_PHY)
+ ret = mii_link_ok(&dm->mii);
+ else
+ ret = dm9000_read_locked(dm, DM9000_NSR) & NSR_LINKST ? 1 : 0;
+
+ return ret;
+}
+
+#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)
+{
+ struct board_info *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)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+ int offset = ee->offset;
+ int len = ee->len;
+ int done;
+
+ /* EEPROM access is aligned to two bytes */
+
+ if (dm->flags & DM9000_PLATF_NO_EEPROM)
+ return -ENOENT;
+
+ if (ee->magic != DM_EEPROM_MAGIC)
+ return -EINVAL;
+
+ while (len > 0) {
+ if (len & 1 || offset & 1) {
+ int which = offset & 1;
+ u8 tmp[2];
+
+ dm9000_read_eeprom(dm, offset / 2, tmp);
+ tmp[which] = *data;
+ dm9000_write_eeprom(dm, offset / 2, tmp);
+
+ done = 1;
+ } else {
+ dm9000_write_eeprom(dm, offset / 2, data);
+ done = 2;
+ }
+
+ data += done;
+ offset += done;
+ len -= done;
+ }
+
+ return 0;
+}
+
+static void dm9000_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+
+ memset(w, 0, sizeof(struct ethtool_wolinfo));
+
+ /* note, we could probably support wake-phy too */
+ w->supported = dm->wake_supported ? WAKE_MAGIC : 0;
+ w->wolopts = dm->wake_state;
+}
+
+static int dm9000_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+ unsigned long flags;
+ u32 opts = w->wolopts;
+ u32 wcr = 0;
+
+ if (!dm->wake_supported)
+ return -EOPNOTSUPP;
+
+ if (opts & ~WAKE_MAGIC)
+ return -EINVAL;
+
+ if (opts & WAKE_MAGIC)
+ wcr |= WCR_MAGICEN;
+
+ mutex_lock(&dm->addr_lock);
+
+ spin_lock_irqsave(&dm->lock, flags);
+ iow(dm, DM9000_WCR, wcr);
+ spin_unlock_irqrestore(&dm->lock, flags);
+
+ mutex_unlock(&dm->addr_lock);
+
+ if (dm->wake_state != opts) {
+ /* change in wol state, update IRQ state */
+
+ if (!dm->wake_state)
+ irq_set_irq_wake(dm->irq_wake, 1);
+ else if (dm->wake_state && !opts)
+ irq_set_irq_wake(dm->irq_wake, 0);
+ }
+
+ dm->wake_state = opts;
+ 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_wol = dm9000_get_wol,
+ .set_wol = dm9000_set_wol,
+ .get_eeprom_len = dm9000_get_eeprom_len,
+ .get_eeprom = dm9000_get_eeprom,
+ .set_eeprom = dm9000_set_eeprom,
+};
+
+static void dm9000_show_carrier(struct board_info *db,
+ unsigned carrier, unsigned nsr)
+{
+ int lpa;
+ struct net_device *ndev = db->ndev;
+ struct mii_if_info *mii = &db->mii;
+ unsigned ncr = dm9000_read_locked(db, DM9000_NCR);
+
+ if (carrier) {
+ lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
+ dev_info(db->dev,
+ "%s: link up, %dMbps, %s-duplex, lpa 0x%04X\n",
+ ndev->name, (nsr & NSR_SPEED) ? 10 : 100,
+ (ncr & NCR_FDX) ? "full" : "half", lpa);
+ } else {
+ dev_info(db->dev, "%s: link down\n", ndev->name);
+ }
+}
+
+static void
+dm9000_poll_work(struct work_struct *w)
+{
+ struct delayed_work *dw = to_delayed_work(w);
+ struct board_info *db = container_of(dw, struct board_info, phy_poll);
+ struct net_device *ndev = db->ndev;
+
+ if (db->flags & DM9000_PLATF_SIMPLE_PHY &&
+ !(db->flags & DM9000_PLATF_EXT_PHY)) {
+ unsigned nsr = dm9000_read_locked(db, DM9000_NSR);
+ unsigned old_carrier = netif_carrier_ok(ndev) ? 1 : 0;
+ unsigned new_carrier;
+
+ new_carrier = (nsr & NSR_LINKST) ? 1 : 0;
+
+ if (old_carrier != new_carrier) {
+ if (netif_msg_link(db))
+ dm9000_show_carrier(db, new_carrier, nsr);
+
+ if (!new_carrier)
+ netif_carrier_off(ndev);
+ else
+ netif_carrier_on(ndev);
+ }
+ } else
+ mii_check_media(&db->mii, netif_msg_link(db), 0);
+
+ if (netif_running(ndev))
+ dm9000_schedule_poll(db);
+}
+
+/* dm9000_release_board
+ *
+ * release a board, and any mapped resources
+ */
+
+static void
+dm9000_release_board(struct platform_device *pdev, struct board_info *db)
+{
+ /* unmap our resources */
+
+ iounmap(db->io_addr);
+ iounmap(db->io_data);
+
+ /* release the resources */
+
+ if (db->data_req)
+ release_resource(db->data_req);
+ kfree(db->data_req);
+
+ if (db->addr_req)
+ release_resource(db->addr_req);
+ kfree(db->addr_req);
+}
+
+static unsigned char dm9000_type_to_char(enum dm9000_type type)
+{
+ switch (type) {
+ case TYPE_DM9000E: return 'e';
+ case TYPE_DM9000A: return 'a';
+ case TYPE_DM9000B: return 'b';
+ }
+
+ return '?';
+}
+
+/*
+ * Set DM9000 multicast address
+ */
+static void
+dm9000_hash_table_unlocked(struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+ struct netdev_hw_addr *ha;
+ int i, oft;
+ u32 hash_val;
+ u16 hash_table[4] = { 0, 0, 0, 0x8000 }; /* broadcast address */
+ u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
+
+ dm9000_dbg(db, 1, "entering %s\n", __func__);
+
+ for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
+ iow(db, oft, dev->dev_addr[i]);
+
+ if (dev->flags & IFF_PROMISC)
+ rcr |= RCR_PRMSC;
+
+ if (dev->flags & IFF_ALLMULTI)
+ rcr |= RCR_ALL;
+
+ /* the multicast address in Hash Table : 64 bits */
+ netdev_for_each_mc_addr(ha, dev) {
+ hash_val = ether_crc_le(6, ha->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);
+}
+
+static void
+dm9000_hash_table(struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&db->lock, flags);
+ dm9000_hash_table_unlocked(dev);
+ spin_unlock_irqrestore(&db->lock, flags);
+}
+
+static void
+dm9000_mask_interrupts(struct board_info *db)
+{
+ iow(db, DM9000_IMR, IMR_PAR);
+}
+
+static void
+dm9000_unmask_interrupts(struct board_info *db)
+{
+ iow(db, DM9000_IMR, db->imr_all);
+}
+
+/*
+ * Initialize dm9000 board
+ */
+static void
+dm9000_init_dm9000(struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+ unsigned int imr;
+ unsigned int ncr;
+
+ dm9000_dbg(db, 1, "entering %s\n", __func__);
+
+ dm9000_reset(db);
+ dm9000_mask_interrupts(db);
+
+ /* I/O mode */
+ db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
+
+ /* Checksum mode */
+ if (dev->hw_features & NETIF_F_RXCSUM)
+ iow(db, DM9000_RCSR,
+ (dev->features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);
+
+ iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
+ iow(db, DM9000_GPR, 0);
+
+ /* If we are dealing with DM9000B, some extra steps are required: a
+ * manual phy reset, and setting init params.
+ */
+ if (db->type == TYPE_DM9000B) {
+ dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);
+ dm9000_phy_write(dev, 0, MII_DM_DSPCR, DSPCR_INIT_PARAM);
+ }
+
+ ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0;
+
+ /* if wol is needed, then always set NCR_WAKEEN otherwise we end
+ * up dumping the wake events if we disable this. There is already
+ * a wake-mask in DM9000_WCR */
+ if (db->wake_supported)
+ ncr |= NCR_WAKEEN;
+
+ iow(db, DM9000_NCR, ncr);
+
+ /* 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_unlocked(dev);
+
+ imr = IMR_PAR | IMR_PTM | IMR_PRM;
+ if (db->type != TYPE_DM9000E)
+ imr |= IMR_LNKCHNG;
+
+ db->imr_all = imr;
+
+ /* Init Driver variable */
+ db->tx_pkt_cnt = 0;
+ db->queue_pkt_len = 0;
+ dev->trans_start = jiffies;
+}
+
+/* Our watchdog timed out. Called by the networking layer */
+static void dm9000_timeout(struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+ u8 reg_save;
+ unsigned long flags;
+
+ /* Save previous register address */
+ spin_lock_irqsave(&db->lock, flags);
+ db->in_timeout = 1;
+ reg_save = readb(db->io_addr);
+
+ netif_stop_queue(dev);
+ dm9000_init_dm9000(dev);
+ dm9000_unmask_interrupts(db);
+ /* We can accept TX packets again */
+ dev->trans_start = jiffies; /* prevent tx timeout */
+ netif_wake_queue(dev);
+
+ /* Restore previous register address */
+ writeb(reg_save, db->io_addr);
+ db->in_timeout = 0;
+ spin_unlock_irqrestore(&db->lock, flags);
+}
+
+static void dm9000_send_packet(struct net_device *dev,
+ int ip_summed,
+ u16 pkt_len)
+{
+ struct board_info *dm = to_dm9000_board(dev);
+
+ /* The DM9000 is not smart enough to leave fragmented packets alone. */
+ if (dm->ip_summed != ip_summed) {
+ if (ip_summed == CHECKSUM_NONE)
+ iow(dm, DM9000_TCCR, 0);
+ else
+ iow(dm, DM9000_TCCR, TCCR_IP | TCCR_UDP | TCCR_TCP);
+ dm->ip_summed = ip_summed;
+ }
+
+ /* Set TX length to DM9000 */
+ iow(dm, DM9000_TXPLL, pkt_len);
+ iow(dm, DM9000_TXPLH, pkt_len >> 8);
+
+ /* Issue TX polling command */
+ iow(dm, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
+}
+
+/*
+ * 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;
+ struct board_info *db = netdev_priv(dev);
+
+ dm9000_dbg(db, 3, "%s:\n", __func__);
+
+ if (db->tx_pkt_cnt > 1)
+ return NETDEV_TX_BUSY;
+
+ 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) {
+ dm9000_send_packet(dev, skb->ip_summed, skb->len);
+ } else {
+ /* Second packet */
+ db->queue_pkt_len = skb->len;
+ db->queue_ip_summed = skb->ip_summed;
+ netif_stop_queue(dev);
+ }
+
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ /* free this SKB */
+ dev_consume_skb_any(skb);
+
+ return NETDEV_TX_OK;
+}
+
+/*
+ * DM9000 interrupt handler
+ * receive the packet to upper layer, free the transmitted packet
+ */
+
+static void dm9000_tx_done(struct net_device *dev, struct board_info *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)
+ dm9000_send_packet(dev, db->queue_ip_summed,
+ db->queue_pkt_len);
+ netif_wake_queue(dev);
+ }
+}
+
+struct dm9000_rxhdr {
+ u8 RxPktReady;
+ u8 RxStatus;
+ __le16 RxLen;
+} __packed;
+
+/*
+ * Received a packet and pass to upper layer
+ */
+static void
+dm9000_rx(struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+ 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_ERR) {
+ dev_warn(db->dev, "status check fail: %d\n", rxbyte);
+ iow(db, DM9000_RCR, 0x00); /* Stop Device */
+ 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);
+ }
+
+ /* rxhdr.RxStatus is identical to RSR register. */
+ if (rxhdr.RxStatus & (RSR_FOE | RSR_CE | RSR_AE |
+ RSR_PLE | RSR_RWTO |
+ RSR_LCS | RSR_RF)) {
+ GoodPacket = false;
+ if (rxhdr.RxStatus & RSR_FOE) {
+ if (netif_msg_rx_err(db))
+ dev_dbg(db->dev, "fifo error\n");
+ dev->stats.rx_fifo_errors++;
+ }
+ if (rxhdr.RxStatus & RSR_CE) {
+ if (netif_msg_rx_err(db))
+ dev_dbg(db->dev, "crc error\n");
+ dev->stats.rx_crc_errors++;
+ }
+ if (rxhdr.RxStatus & RSR_RF) {
+ 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 = netdev_alloc_skb(dev, 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);
+ if (dev->features & NETIF_F_RXCSUM) {
+ if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ else
+ skb_checksum_none_assert(skb);
+ }
+ 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 irqreturn_t dm9000_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct board_info *db = netdev_priv(dev);
+ int int_status;
+ unsigned long flags;
+ u8 reg_save;
+
+ dm9000_dbg(db, 3, "entering %s\n", __func__);
+
+ /* A real interrupt coming */
+
+ /* holders of db->lock must always block IRQs */
+ spin_lock_irqsave(&db->lock, flags);
+
+ /* Save previous register address */
+ reg_save = readb(db->io_addr);
+
+ dm9000_mask_interrupts(db);
+ /* 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);
+
+ if (db->type != TYPE_DM9000E) {
+ if (int_status & ISR_LNKCHNG) {
+ /* fire a link-change request */
+ schedule_delayed_work(&db->phy_poll, 1);
+ }
+ }
+
+ dm9000_unmask_interrupts(db);
+ /* Restore previous register address */
+ writeb(reg_save, db->io_addr);
+
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t dm9000_wol_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct board_info *db = netdev_priv(dev);
+ unsigned long flags;
+ unsigned nsr, wcr;
+
+ spin_lock_irqsave(&db->lock, flags);
+
+ nsr = ior(db, DM9000_NSR);
+ wcr = ior(db, DM9000_WCR);
+
+ dev_dbg(db->dev, "%s: NSR=0x%02x, WCR=0x%02x\n", __func__, nsr, wcr);
+
+ if (nsr & NSR_WAKEST) {
+ /* clear, so we can avoid */
+ iow(db, DM9000_NSR, NSR_WAKEST);
+
+ if (wcr & WCR_LINKST)
+ dev_info(db->dev, "wake by link status change\n");
+ if (wcr & WCR_SAMPLEST)
+ dev_info(db->dev, "wake by sample packet\n");
+ if (wcr & WCR_MAGICST)
+ dev_info(db->dev, "wake by magic packet\n");
+ if (!(wcr & (WCR_LINKST | WCR_SAMPLEST | WCR_MAGICST)))
+ dev_err(db->dev, "wake signalled with no reason? "
+ "NSR=0x%02x, WSR=0x%02x\n", nsr, wcr);
+ }
+
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ return (nsr & NSR_WAKEST) ? IRQ_HANDLED : IRQ_NONE;
+}
+
+#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
+
+/*
+ * Open the interface.
+ * The interface is opened whenever "ifconfig" actives it.
+ */
+static int
+dm9000_open(struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+ 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)
+ irqflags = irq_get_trigger_type(dev->irq);
+
+ if (irqflags == IRQF_TRIGGER_NONE)
+ dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
+
+ irqflags |= IRQF_SHARED;
+
+ /* GPIO0 on pre-activate PHY, Reg 1F is not set by reset */
+ iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
+ mdelay(1); /* delay needs by DM9000B */
+
+ /* Initialize DM9000 board */
+ dm9000_init_dm9000(dev);
+
+ if (request_irq(dev->irq, dm9000_interrupt, irqflags, dev->name, dev))
+ return -EAGAIN;
+ /* Now that we have an interrupt handler hooked up we can unmask
+ * our interrupts
+ */
+ dm9000_unmask_interrupts(db);
+
+ /* Init driver variable */
+ db->dbug_cnt = 0;
+
+ mii_check_media(&db->mii, netif_msg_link(db), 1);
+ netif_start_queue(dev);
+
+ /* Poll initial link status */
+ schedule_delayed_work(&db->phy_poll, 1);
+
+ return 0;
+}
+
+static void
+dm9000_shutdown(struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+
+ /* RESET device */
+ dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
+ iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
+ dm9000_mask_interrupts(db);
+ 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)
+{
+ struct board_info *db = netdev_priv(ndev);
+
+ if (netif_msg_ifdown(db))
+ dev_dbg(db->dev, "shutting down %s\n", ndev->name);
+
+ cancel_delayed_work_sync(&db->phy_poll);
+
+ netif_stop_queue(ndev);
+ netif_carrier_off(ndev);
+
+ /* free interrupt */
+ free_irq(ndev->irq, ndev);
+
+ dm9000_shutdown(ndev);
+
+ return 0;
+}
+
+static const struct net_device_ops dm9000_netdev_ops = {
+ .ndo_open = dm9000_open,
+ .ndo_stop = dm9000_stop,
+ .ndo_start_xmit = dm9000_start_xmit,
+ .ndo_tx_timeout = dm9000_timeout,
+ .ndo_set_rx_mode = dm9000_hash_table,
+ .ndo_do_ioctl = dm9000_ioctl,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_features = dm9000_set_features,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = dm9000_poll_controller,
+#endif
+};
+
+static struct dm9000_plat_data *dm9000_parse_dt(struct device *dev)
+{
+ struct dm9000_plat_data *pdata;
+ struct device_node *np = dev->of_node;
+ const void *mac_addr;
+
+ if (!IS_ENABLED(CONFIG_OF) || !np)
+ return ERR_PTR(-ENXIO);
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ if (of_find_property(np, "davicom,ext-phy", NULL))
+ pdata->flags |= DM9000_PLATF_EXT_PHY;
+ if (of_find_property(np, "davicom,no-eeprom", NULL))
+ pdata->flags |= DM9000_PLATF_NO_EEPROM;
+
+ mac_addr = of_get_mac_address(np);
+ if (mac_addr)
+ memcpy(pdata->dev_addr, mac_addr, sizeof(pdata->dev_addr));
+
+ return pdata;
+}
+
+/*
+ * Search DM9000 board, allocate space and register it
+ */
+static int
+dm9000_probe(struct platform_device *pdev)
+{
+ struct dm9000_plat_data *pdata = dev_get_platdata(&pdev->dev);
+ struct board_info *db; /* Point a board information structure */
+ struct net_device *ndev;
+ struct device *dev = &pdev->dev;
+ const unsigned char *mac_src;
+ int ret = 0;
+ int iosize;
+ int i;
+ u32 id_val;
+ int reset_gpios;
+ enum of_gpio_flags flags;
+ struct regulator *power;
+
+ power = devm_regulator_get(dev, "vcc");
+ if (IS_ERR(power)) {
+ if (PTR_ERR(power) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_dbg(dev, "no regulator provided\n");
+ } else {
+ ret = regulator_enable(power);
+ if (ret != 0) {
+ dev_err(dev,
+ "Failed to enable power regulator: %d\n", ret);
+ return ret;
+ }
+ dev_dbg(dev, "regulator enabled\n");
+ }
+
+ reset_gpios = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0,
+ &flags);
+ if (gpio_is_valid(reset_gpios)) {
+ ret = devm_gpio_request_one(dev, reset_gpios, flags,
+ "dm9000_reset");
+ if (ret) {
+ dev_err(dev, "failed to request reset gpio %d: %d\n",
+ reset_gpios, ret);
+ return -ENODEV;
+ }
+
+ /* According to manual PWRST# Low Period Min 1ms */
+ msleep(2);
+ gpio_set_value(reset_gpios, 1);
+ /* Needs 3ms to read eeprom when PWRST is deasserted */
+ msleep(4);
+ }
+
+ if (!pdata) {
+ pdata = dm9000_parse_dt(&pdev->dev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ }
+
+ /* Init network device */
+ ndev = alloc_etherdev(sizeof(struct board_info));
+ if (!ndev)
+ return -ENOMEM;
+
+ SET_NETDEV_DEV(ndev, &pdev->dev);
+
+ dev_dbg(&pdev->dev, "dm9000_probe()\n");
+
+ /* setup board info structure */
+ db = netdev_priv(ndev);
+
+ db->dev = &pdev->dev;
+ db->ndev = ndev;
+
+ spin_lock_init(&db->lock);
+ mutex_init(&db->addr_lock);
+
+ INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work);
+
+ 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;
+ }
+
+ db->irq_wake = platform_get_irq(pdev, 1);
+ if (db->irq_wake >= 0) {
+ dev_dbg(db->dev, "wakeup irq %d\n", db->irq_wake);
+
+ ret = request_irq(db->irq_wake, dm9000_wol_interrupt,
+ IRQF_SHARED, dev_name(db->dev), ndev);
+ if (ret) {
+ dev_err(db->dev, "cannot get wakeup irq (%d)\n", ret);
+ } else {
+
+ /* test to see if irq is really wakeup capable */
+ ret = irq_set_irq_wake(db->irq_wake, 1);
+ if (ret) {
+ dev_err(db->dev, "irq %d cannot set wakeup (%d)\n",
+ db->irq_wake, ret);
+ ret = 0;
+ } else {
+ irq_set_irq_wake(db->irq_wake, 0);
+ db->wake_supported = 1;
+ }
+ }
+ }
+
+ iosize = resource_size(db->addr_res);
+ db->addr_req = request_mem_region(db->addr_res->start, iosize,
+ 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, iosize);
+
+ if (db->io_addr == NULL) {
+ dev_err(db->dev, "failed to ioremap address reg\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ iosize = resource_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;
+ }
+
+#ifdef CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL
+ db->flags |= DM9000_PLATF_SIMPLE_PHY;
+#endif
+
+ dm9000_reset(db);
+
+ /* try multiple times, DM9000 sometimes gets the 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;
+ }
+
+ /* Identify what type of DM9000 we are working on */
+
+ id_val = ior(db, DM9000_CHIPR);
+ dev_dbg(db->dev, "dm9000 revision 0x%02x\n", id_val);
+
+ switch (id_val) {
+ case CHIPR_DM9000A:
+ db->type = TYPE_DM9000A;
+ break;
+ case CHIPR_DM9000B:
+ db->type = TYPE_DM9000B;
+ break;
+ default:
+ dev_dbg(db->dev, "ID %02x => defaulting to DM9000E\n", id_val);
+ db->type = TYPE_DM9000E;
+ }
+
+ /* dm9000a/b are capable of hardware checksum offload */
+ if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) {
+ ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
+ ndev->features |= ndev->hw_features;
+ }
+
+ /* from this point we assume that we have found a DM9000 */
+
+ ndev->netdev_ops = &dm9000_netdev_ops;
+ ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
+ ndev->ethtool_ops = &dm9000_ethtool_ops;
+
+ 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) && pdata != NULL) {
+ mac_src = "platform data";
+ memcpy(ndev->dev_addr, pdata->dev_addr, ETH_ALEN);
+ }
+
+ 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);
+
+ eth_hw_addr_random(ndev);
+ mac_src = "random";
+ }
+
+
+ platform_set_drvdata(pdev, ndev);
+ ret = register_netdev(ndev);
+
+ if (ret == 0)
+ printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)\n",
+ ndev->name, dm9000_type_to_char(db->type),
+ db->io_addr, db->io_data, ndev->irq,
+ 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;
+}
+
+static int
+dm9000_drv_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct board_info *db;
+
+ if (ndev) {
+ db = netdev_priv(ndev);
+ db->in_suspend = 1;
+
+ if (!netif_running(ndev))
+ return 0;
+
+ netif_device_detach(ndev);
+
+ /* only shutdown if not using WoL */
+ if (!db->wake_state)
+ dm9000_shutdown(ndev);
+ }
+ return 0;
+}
+
+static int
+dm9000_drv_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct board_info *db = netdev_priv(ndev);
+
+ if (ndev) {
+ if (netif_running(ndev)) {
+ /* reset if we were not in wake mode to ensure if
+ * the device was powered off it is in a known state */
+ if (!db->wake_state) {
+ dm9000_init_dm9000(ndev);
+ dm9000_unmask_interrupts(db);
+ }
+
+ netif_device_attach(ndev);
+ }
+
+ db->in_suspend = 0;
+ }
+ return 0;
+}
+
+static const struct dev_pm_ops dm9000_drv_pm_ops = {
+ .suspend = dm9000_drv_suspend,
+ .resume = dm9000_drv_resume,
+};
+
+static int
+dm9000_drv_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+
+ unregister_netdev(ndev);
+ dm9000_release_board(pdev, netdev_priv(ndev));
+ free_netdev(ndev); /* free device structure */
+
+ dev_dbg(&pdev->dev, "released and freed device\n");
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id dm9000_of_matches[] = {
+ { .compatible = "davicom,dm9000", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dm9000_of_matches);
+#endif
+
+static struct platform_driver dm9000_driver = {
+ .driver = {
+ .name = "dm9000",
+ .pm = &dm9000_drv_pm_ops,
+ .of_match_table = of_match_ptr(dm9000_of_matches),
+ },
+ .probe = dm9000_probe,
+ .remove = dm9000_drv_remove,
+};
+
+module_platform_driver(dm9000_driver);
+
+MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
+MODULE_DESCRIPTION("Davicom DM9000 network driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:dm9000");
Code Review / kvmfornfv.git / blobdiff