[PATCH] DM9000 network driver
Sascha Hauer [Thu, 5 May 2005 22:14:15 +0000 (15:14 -0700)]
This patch adds support for the davicom dm9000 network driver.  The dm9000
is found on some embedded arm boards such as the pimx1 or the scb9328.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>

diff -puN /dev/null drivers/net/dm9000.c

drivers/net/Kconfig
drivers/net/Makefile
drivers/net/dm9000.c [new file with mode: 0644]
drivers/net/dm9000.h [new file with mode: 0644]
include/linux/dm9000.h [new file with mode: 0644]

index 3a0a55b..4d0c1fb 100644 (file)
@@ -824,6 +824,18 @@ config SMC9194
          <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
index 6202b10..cbd1168 100644 (file)
@@ -179,6 +179,7 @@ obj-$(CONFIG_AMD8111_ETH) += amd8111e.o
 obj-$(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 --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
new file mode 100644 (file)
index 0000000..f4ba0ff
--- /dev/null
@@ -0,0 +1,1219 @@
+/*
+ *   dm9000.c: Version 1.2 03/18/2003
+ *
+ *         A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
+ *     Copyright (C) 1997  Sten Wang
+ *
+ *     This program is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License
+ *     as published by the Free Software Foundation; either version 2
+ *     of the License, or (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *   (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
+ *
+ * V0.11       06/20/2001      REG_0A bit3=1, default enable BP with DA match
+ *     06/22/2001      Support DM9801 progrmming
+ *                     E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
+ *                     E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
+ *                             R17 = (R17 & 0xfff0) | NF + 3
+ *                     E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
+ *                             R17 = (R17 & 0xfff0) | NF
+ *
+ * v1.00                       modify by simon 2001.9.5
+ *                         change for kernel 2.4.x
+ *
+ * v1.1   11/09/2001           fix force mode bug
+ *
+ * v1.2   03/18/2003       Weilun Huang <weilun_huang@davicom.com.tw>:
+ *                     Fixed phy reset.
+ *                     Added tx/rx 32 bit mode.
+ *                     Cleaned up for kernel merge.
+ *
+ *        03/03/2004    Sascha Hauer <s.hauer@pengutronix.de>
+ *                      Port to 2.6 kernel
+ *
+ *       24-Sep-2004   Ben Dooks <ben@simtec.co.uk>
+ *                     Cleanup of code to remove ifdefs
+ *                     Allowed platform device data to influence access width
+ *                     Reformatting areas of code
+ *
+ *        17-Mar-2005   Sascha Hauer <s.hauer@pengutronix.de>
+ *                      * removed 2.4 style module parameters
+ *                      * removed removed unused stat counter and fixed
+ *                        net_device_stats
+ *                      * introduced tx_timeout function
+ *                      * reworked locking
+ */
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/dm9000.h>
+#include <linux/delay.h>
+
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include "dm9000.h"
+
+/* Board/System/Debug information/definition ---------------- */
+
+#define DM9000_PHY             0x40    /* PHY address 0x01 */
+
+#define TRUE                   1
+#define FALSE                  0
+
+#define CARDNAME "dm9000"
+#define PFX CARDNAME ": "
+
+#define DM9000_TIMER_WUT  jiffies+(HZ*2)       /* timer wakeup time : 2 second */
+
+#define DM9000_DEBUG 0
+
+#if DM9000_DEBUG > 2
+#define PRINTK3(args...)  printk(CARDNAME ": " args)
+#else
+#define PRINTK3(args...)  do { } while(0)
+#endif
+
+#if DM9000_DEBUG > 1
+#define PRINTK2(args...)  printk(CARDNAME ": " args)
+#else
+#define PRINTK2(args...)  do { } while(0)
+#endif
+
+#if DM9000_DEBUG > 0
+#define PRINTK1(args...)  printk(CARDNAME ": " args)
+#define PRINTK(args...)   printk(CARDNAME ": " args)
+#else
+#define PRINTK1(args...)  do { } while(0)
+#define PRINTK(args...)   printk(KERN_DEBUG args)
+#endif
+
+/*
+ * Transmit timeout, default 5 seconds.
+ */
+static int watchdog = 5000;
+module_param(watchdog, int, 0400);
+MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
+
+/* Structure/enum declaration ------------------------------- */
+typedef struct board_info {
+
+       void __iomem *io_addr;  /* Register I/O base address */
+       void __iomem *io_data;  /* Data I/O address */
+       u16 irq;                /* IRQ */
+
+       u16 tx_pkt_cnt;
+       u16 queue_pkt_len;
+       u16 queue_start_addr;
+       u16 dbug_cnt;
+       u8 io_mode;             /* 0:word, 2:byte */
+       u8 phy_addr;
+
+       void (*inblk)(void __iomem *port, void *data, int length);
+       void (*outblk)(void __iomem *port, void *data, int length);
+       void (*dumpblk)(void __iomem *port, int length);
+
+       struct resource *addr_res;   /* resources found */
+       struct resource *data_res;
+       struct resource *addr_req;   /* resources requested */
+       struct resource *data_req;
+       struct resource *irq_res;
+
+       struct timer_list timer;
+       struct net_device_stats stats;
+       unsigned char srom[128];
+       spinlock_t lock;
+
+       struct mii_if_info mii;
+       u32 msg_enable;
+} board_info_t;
+
+/* function declaration ------------------------------------- */
+static int dm9000_probe(struct device *);
+static int dm9000_open(struct net_device *);
+static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
+static int dm9000_stop(struct net_device *);
+static int dm9000_do_ioctl(struct net_device *, struct ifreq *, int);
+
+
+static void dm9000_timer(unsigned long);
+static void dm9000_init_dm9000(struct net_device *);
+
+static struct net_device_stats *dm9000_get_stats(struct net_device *);
+
+static irqreturn_t dm9000_interrupt(int, void *, struct pt_regs *);
+
+static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
+static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
+                          int value);
+static u16 read_srom_word(board_info_t *, int);
+static void dm9000_rx(struct net_device *);
+static void dm9000_hash_table(struct net_device *);
+
+//#define DM9000_PROGRAM_EEPROM
+#ifdef DM9000_PROGRAM_EEPROM
+static void program_eeprom(board_info_t * db);
+#endif
+/* DM9000 network board routine ---------------------------- */
+
+static void
+dm9000_reset(board_info_t * db)
+{
+       PRINTK1("dm9000x: resetting\n");
+       /* RESET device */
+       writeb(DM9000_NCR, db->io_addr);
+       udelay(200);
+       writeb(NCR_RST, db->io_data);
+       udelay(200);
+}
+
+/*
+ *   Read a byte from I/O port
+ */
+static u8
+ior(board_info_t * db, int reg)
+{
+       writeb(reg, db->io_addr);
+       return readb(db->io_data);
+}
+
+/*
+ *   Write a byte to I/O port
+ */
+
+static void
+iow(board_info_t * db, int reg, int value)
+{
+       writeb(reg, db->io_addr);
+       writeb(value, db->io_data);
+}
+
+/* routines for sending block to chip */
+
+static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
+{
+       writesb(reg, data, count);
+}
+
+static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
+{
+       writesw(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
+{
+       writesl(reg, data, (count+3) >> 2);
+}
+
+/* input block from chip to memory */
+
+static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
+{
+       readsb(reg, data, count+1);
+}
+
+
+static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
+{
+       readsw(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
+{
+       readsl(reg, data, (count+3) >> 2);
+}
+
+/* dump block from chip to null */
+
+static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
+{
+       int i;
+       int tmp;
+
+       for (i = 0; i < count; i++)
+               tmp = readb(reg);
+}
+
+static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
+{
+       int i;
+       int tmp;
+
+       count = (count + 1) >> 1;
+
+       for (i = 0; i < count; i++)
+               tmp = readw(reg);
+}
+
+static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
+{
+       int i;
+       int tmp;
+
+       count = (count + 3) >> 2;
+
+       for (i = 0; i < count; i++)
+               tmp = readl(reg);
+}
+
+/* dm9000_set_io
+ *
+ * select the specified set of io routines to use with the
+ * device
+ */
+
+static void dm9000_set_io(struct board_info *db, int byte_width)
+{
+       /* use the size of the data resource to work out what IO
+        * routines we want to use
+        */
+
+       switch (byte_width) {
+       case 1:
+               db->dumpblk = dm9000_dumpblk_8bit;
+               db->outblk  = dm9000_outblk_8bit;
+               db->inblk   = dm9000_inblk_8bit;
+               break;
+
+       case 2:
+               db->dumpblk = dm9000_dumpblk_16bit;
+               db->outblk  = dm9000_outblk_16bit;
+               db->inblk   = dm9000_inblk_16bit;
+               break;
+
+       case 3:
+               printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
+               db->dumpblk = dm9000_dumpblk_16bit;
+               db->outblk  = dm9000_outblk_16bit;
+               db->inblk   = dm9000_inblk_16bit;
+               break;
+
+       case 4:
+       default:
+               db->dumpblk = dm9000_dumpblk_32bit;
+               db->outblk  = dm9000_outblk_32bit;
+               db->inblk   = dm9000_inblk_32bit;
+               break;
+       }
+}
+
+
+/* Our watchdog timed out. Called by the networking layer */
+static void dm9000_timeout(struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+       u8 reg_save;
+       unsigned long flags;
+
+       /* Save previous register address */
+       reg_save = readb(db->io_addr);
+       spin_lock_irqsave(db->lock,flags);
+
+       netif_stop_queue(dev);
+       dm9000_reset(db);
+       dm9000_init_dm9000(dev);
+       /* We can accept TX packets again */
+       dev->trans_start = jiffies;
+       netif_wake_queue(dev);
+
+       /* Restore previous register address */
+       writeb(reg_save, db->io_addr);
+       spin_unlock_irqrestore(db->lock,flags);
+}
+
+
+/* dm9000_release_board
+ *
+ * release a board, and any mapped resources
+ */
+
+static void
+dm9000_release_board(struct platform_device *pdev, struct board_info *db)
+{
+       if (db->data_res == NULL) {
+               if (db->addr_res != NULL)
+                       release_mem_region((unsigned long)db->io_addr, 4);
+               return;
+       }
+
+       /* unmap our resources */
+
+       iounmap(db->io_addr);
+       iounmap(db->io_data);
+
+       /* release the resources */
+
+       if (db->data_req != NULL) {
+               release_resource(db->data_req);
+               kfree(db->data_req);
+       }
+
+       if (db->addr_res != NULL) {
+               release_resource(db->data_req);
+               kfree(db->addr_req);
+       }
+}
+
+#define res_size(_r) (((_r)->end - (_r)->start) + 1)
+
+/*
+ * Search DM9000 board, allocate space and register it
+ */
+static int
+dm9000_probe(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct dm9000_plat_data *pdata = pdev->dev.platform_data;
+       struct board_info *db;  /* Point a board information structure */
+       struct net_device *ndev;
+       unsigned long base;
+       int ret = 0;
+       int iosize;
+       int i;
+       u32 id_val;
+
+       printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
+
+       /* Init network device */
+       ndev = alloc_etherdev(sizeof (struct board_info));
+       if (!ndev) {
+               printk("%s: could not allocate device.\n", CARDNAME);
+               return -ENOMEM;
+       }
+
+       SET_MODULE_OWNER(ndev);
+       SET_NETDEV_DEV(ndev, dev);
+
+       PRINTK2("dm9000_probe()");
+
+       /* setup board info structure */
+       db = (struct board_info *) ndev->priv;
+       memset(db, 0, sizeof (*db));
+
+       if (pdev->num_resources < 2) {
+               ret = -ENODEV;
+               goto out;
+       }
+
+       switch (pdev->num_resources) {
+       case 2:
+               base = pdev->resource[0].start;
+
+               if (!request_mem_region(base, 4, ndev->name)) {
+                       ret = -EBUSY;
+                       goto out;
+               }
+
+               ndev->base_addr = base;
+               ndev->irq = pdev->resource[1].start;
+               db->io_addr = (void *)base;
+               db->io_data = (void *)(base + 4);
+
+               break;
+
+       case 3:
+               db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+               db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+               db->irq_res  = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+               if (db->addr_res == NULL || db->data_res == NULL) {
+                       printk(KERN_ERR PFX "insufficient resources\n");
+                       ret = -ENOENT;
+                       goto out;
+               }
+
+               i = res_size(db->addr_res);
+               db->addr_req = request_mem_region(db->addr_res->start, i,
+                                                 pdev->name);
+
+               if (db->addr_req == NULL) {
+                       printk(KERN_ERR PFX "cannot claim address reg area\n");
+                       ret = -EIO;
+                       goto out;
+               }
+
+               db->io_addr = ioremap(db->addr_res->start, i);
+
+               if (db->io_addr == NULL) {
+                       printk(KERN_ERR "failed to ioremap address reg\n");
+                       ret = -EINVAL;
+                       goto out;
+               }
+
+               iosize = res_size(db->data_res);
+               db->data_req = request_mem_region(db->data_res->start, iosize,
+                                                 pdev->name);
+
+               if (db->data_req == NULL) {
+                       printk(KERN_ERR PFX "cannot claim data reg area\n");
+                       ret = -EIO;
+                       goto out;
+               }
+
+               db->io_data = ioremap(db->data_res->start, iosize);
+
+               if (db->io_data == NULL) {
+                       printk(KERN_ERR "failed to ioremap data reg\n");
+                       ret = -EINVAL;
+                       goto out;
+               }
+
+               /* fill in parameters for net-dev structure */
+
+               ndev->base_addr = (unsigned long)db->io_addr;
+               ndev->irq       = db->irq_res->start;
+
+               /* ensure at least we have a default set of IO routines */
+               dm9000_set_io(db, iosize);
+
+       }
+
+       /* check to see if anything is being over-ridden */
+       if (pdata != NULL) {
+               /* check to see if the driver wants to over-ride the
+                * default IO width */
+
+               if (pdata->flags & DM9000_PLATF_8BITONLY)
+                       dm9000_set_io(db, 1);
+
+               if (pdata->flags & DM9000_PLATF_16BITONLY)
+                       dm9000_set_io(db, 2);
+
+               if (pdata->flags & DM9000_PLATF_32BITONLY)
+                       dm9000_set_io(db, 4);
+
+               /* check to see if there are any IO routine
+                * over-rides */
+
+               if (pdata->inblk != NULL)
+                       db->inblk = pdata->inblk;
+
+               if (pdata->outblk != NULL)
+                       db->outblk = pdata->outblk;
+
+               if (pdata->dumpblk != NULL)
+                       db->dumpblk = pdata->dumpblk;
+       }
+
+       dm9000_reset(db);
+
+       /* try two times, DM9000 sometimes gets the first read wrong */
+       for (i = 0; i < 2; i++) {
+               id_val  = ior(db, DM9000_VIDL);
+               id_val |= (u32)ior(db, DM9000_VIDH) << 8;
+               id_val |= (u32)ior(db, DM9000_PIDL) << 16;
+               id_val |= (u32)ior(db, DM9000_PIDH) << 24;
+
+               if (id_val == DM9000_ID)
+                       break;
+               printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
+       }
+
+       if (id_val != DM9000_ID) {
+               printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
+               goto release;
+       }
+
+       /* from this point we assume that we have found a DM9000 */
+
+       /* driver system function */
+       ether_setup(ndev);
+
+       ndev->open               = &dm9000_open;
+       ndev->hard_start_xmit    = &dm9000_start_xmit;
+       ndev->tx_timeout         = &dm9000_timeout;
+       ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
+       ndev->stop               = &dm9000_stop;
+       ndev->get_stats          = &dm9000_get_stats;
+       ndev->set_multicast_list = &dm9000_hash_table;
+       ndev->do_ioctl           = &dm9000_do_ioctl;
+
+#ifdef DM9000_PROGRAM_EEPROM
+       program_eeprom(db);
+#endif
+       db->msg_enable       = NETIF_MSG_LINK;
+       db->mii.phy_id_mask  = 0x1f;
+       db->mii.reg_num_mask = 0x1f;
+       db->mii.force_media  = 0;
+       db->mii.full_duplex  = 0;
+       db->mii.dev          = ndev;
+       db->mii.mdio_read    = dm9000_phy_read;
+       db->mii.mdio_write   = dm9000_phy_write;
+
+       /* Read SROM content */
+       for (i = 0; i < 64; i++)
+               ((u16 *) db->srom)[i] = read_srom_word(db, i);
+
+       /* Set Node Address */
+       for (i = 0; i < 6; i++)
+               ndev->dev_addr[i] = db->srom[i];
+
+       if (!is_valid_ether_addr(ndev->dev_addr))
+               printk("%s: Invalid ethernet MAC address.  Please "
+                      "set using ifconfig\n", ndev->name);
+
+       dev_set_drvdata(dev, ndev);
+       ret = register_netdev(ndev);
+
+       if (ret == 0) {
+               printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
+                      ndev->name,  db->io_addr, db->io_data, ndev->irq);
+               for (i = 0; i < 5; i++)
+                       printk("%02x:", ndev->dev_addr[i]);
+               printk("%02x\n", ndev->dev_addr[5]);
+       }
+       return 0;
+
+ release:
+ out:
+       printk("%s: not found (%d).\n", CARDNAME, ret);
+
+       dm9000_release_board(pdev, db);
+       kfree(ndev);
+
+       return ret;
+}
+
+/*
+ *  Open the interface.
+ *  The interface is opened whenever "ifconfig" actives it.
+ */
+static int
+dm9000_open(struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+
+       PRINTK2("entering dm9000_open\n");
+
+       if (request_irq(dev->irq, &dm9000_interrupt, SA_SHIRQ, dev->name, dev))
+               return -EAGAIN;
+
+       /* Initialize DM9000 board */
+       dm9000_reset(db);
+       dm9000_init_dm9000(dev);
+
+       /* Init driver variable */
+       db->dbug_cnt = 0;
+
+       /* set and active a timer process */
+       init_timer(&db->timer);
+       db->timer.expires  = DM9000_TIMER_WUT * 2;
+       db->timer.data     = (unsigned long) dev;
+       db->timer.function = &dm9000_timer;
+       add_timer(&db->timer);
+
+       mii_check_media(&db->mii, netif_msg_link(db), 1);
+       netif_start_queue(dev);
+
+       return 0;
+}
+
+/*
+ * Initilize dm9000 board
+ */
+static void
+dm9000_init_dm9000(struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+
+       PRINTK1("entering %s\n",__FUNCTION__);
+
+       /* I/O mode */
+       db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
+
+       /* GPIO0 on pre-activate PHY */
+       iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
+       iow(db, DM9000_GPCR, GPCR_GEP_CNTL);    /* Let GPIO0 output */
+       iow(db, DM9000_GPR, 0); /* Enable PHY */
+
+       /* Program operating register */
+       iow(db, DM9000_TCR, 0);         /* TX Polling clear */
+       iow(db, DM9000_BPTR, 0x3f);     /* Less 3Kb, 200us */
+       iow(db, DM9000_FCR, 0xff);      /* Flow Control */
+       iow(db, DM9000_SMCR, 0);        /* Special Mode */
+       /* clear TX status */
+       iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
+       iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
+
+       /* Set address filter table */
+       dm9000_hash_table(dev);
+
+       /* Activate DM9000 */
+       iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
+       /* Enable TX/RX interrupt mask */
+       iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
+
+       /* Init Driver variable */
+       db->tx_pkt_cnt = 0;
+       db->queue_pkt_len = 0;
+       dev->trans_start = 0;
+       spin_lock_init(&db->lock);
+}
+
+/*
+ *  Hardware start transmission.
+ *  Send a packet to media from the upper layer.
+ */
+static int
+dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+
+       PRINTK3("dm9000_start_xmit\n");
+
+       if (db->tx_pkt_cnt > 1)
+               return 1;
+
+       netif_stop_queue(dev);
+
+       /* Disable all interrupts */
+       iow(db, DM9000_IMR, IMR_PAR);
+
+       /* Move data to DM9000 TX RAM */
+       writeb(DM9000_MWCMD, db->io_addr);
+
+       (db->outblk)(db->io_data, skb->data, skb->len);
+       db->stats.tx_bytes += skb->len;
+
+       /* TX control: First packet immediately send, second packet queue */
+       if (db->tx_pkt_cnt == 0) {
+
+               /* First Packet */
+               db->tx_pkt_cnt++;
+
+               /* Set TX length to DM9000 */
+               iow(db, DM9000_TXPLL, skb->len & 0xff);
+               iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
+
+               /* Issue TX polling command */
+               iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
+
+               dev->trans_start = jiffies;     /* save the time stamp */
+
+       } else {
+               /* Second packet */
+               db->tx_pkt_cnt++;
+               db->queue_pkt_len = skb->len;
+       }
+
+       /* free this SKB */
+       dev_kfree_skb(skb);
+
+       /* Re-enable resource check */
+       if (db->tx_pkt_cnt == 1)
+               netif_wake_queue(dev);
+
+       /* Re-enable interrupt */
+       iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
+
+       return 0;
+}
+
+static void
+dm9000_shutdown(struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+
+       /* RESET device */
+       dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
+       iow(db, DM9000_GPR, 0x01);      /* Power-Down PHY */
+       iow(db, DM9000_IMR, IMR_PAR);   /* Disable all interrupt */
+       iow(db, DM9000_RCR, 0x00);      /* Disable RX */
+}
+
+/*
+ * Stop the interface.
+ * The interface is stopped when it is brought.
+ */
+static int
+dm9000_stop(struct net_device *ndev)
+{
+       board_info_t *db = (board_info_t *) ndev->priv;
+
+       PRINTK1("entering %s\n",__FUNCTION__);
+
+       /* deleted timer */
+       del_timer(&db->timer);
+
+       netif_stop_queue(ndev);
+       netif_carrier_off(ndev);
+
+       /* free interrupt */
+       free_irq(ndev->irq, ndev);
+
+       dm9000_shutdown(ndev);
+
+       return 0;
+}
+
+/*
+ * DM9000 interrupt handler
+ * receive the packet to upper layer, free the transmitted packet
+ */
+
+void
+dm9000_tx_done(struct net_device *dev, board_info_t * db)
+{
+       int tx_status = ior(db, DM9000_NSR);    /* Got TX status */
+
+       if (tx_status & (NSR_TX2END | NSR_TX1END)) {
+               /* One packet sent complete */
+               db->tx_pkt_cnt--;
+               db->stats.tx_packets++;
+
+               /* Queue packet check & send */
+               if (db->tx_pkt_cnt > 0) {
+                       iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
+                       iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
+                       iow(db, DM9000_TCR, TCR_TXREQ);
+                       dev->trans_start = jiffies;
+               }
+               netif_wake_queue(dev);
+       }
+}
+
+static irqreturn_t
+dm9000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+       struct net_device *dev = dev_id;
+       board_info_t *db;
+       int int_status;
+       u8 reg_save;
+
+       PRINTK3("entering %s\n",__FUNCTION__);
+
+       if (!dev) {
+               PRINTK1("dm9000_interrupt() without DEVICE arg\n");
+               return IRQ_HANDLED;
+       }
+
+       /* A real interrupt coming */
+       db = (board_info_t *) dev->priv;
+       spin_lock(&db->lock);
+
+       /* Save previous register address */
+       reg_save = readb(db->io_addr);
+
+       /* Disable all interrupts */
+       iow(db, DM9000_IMR, IMR_PAR);
+
+       /* Got DM9000 interrupt status */
+       int_status = ior(db, DM9000_ISR);       /* Got ISR */
+       iow(db, DM9000_ISR, int_status);        /* Clear ISR status */
+
+       /* Received the coming packet */
+       if (int_status & ISR_PRS)
+               dm9000_rx(dev);
+
+       /* Trnasmit Interrupt check */
+       if (int_status & ISR_PTS)
+               dm9000_tx_done(dev, db);
+
+       /* Re-enable interrupt mask */
+       iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
+
+       /* Restore previous register address */
+       writeb(reg_save, db->io_addr);
+
+       spin_unlock(&db->lock);
+
+       return IRQ_HANDLED;
+}
+
+/*
+ *  Get statistics from driver.
+ */
+static struct net_device_stats *
+dm9000_get_stats(struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+       return &db->stats;
+}
+
+/*
+ *  Process the upper socket ioctl command
+ */
+static int
+dm9000_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+       PRINTK1("entering %s\n",__FUNCTION__);
+       return 0;
+}
+
+/*
+ *  A periodic timer routine
+ *  Dynamic media sense, allocated Rx buffer...
+ */
+static void
+dm9000_timer(unsigned long data)
+{
+       struct net_device *dev = (struct net_device *) data;
+       board_info_t *db = (board_info_t *) dev->priv;
+       u8 reg_save;
+       unsigned long flags;
+
+       PRINTK3("dm9000_timer()\n");
+
+       spin_lock_irqsave(db->lock,flags);
+       /* Save previous register address */
+       reg_save = readb(db->io_addr);
+
+       mii_check_media(&db->mii, netif_msg_link(db), 0);
+
+       /* Restore previous register address */
+       writeb(reg_save, db->io_addr);
+       spin_unlock_irqrestore(db->lock,flags);
+
+       /* Set timer again */
+       db->timer.expires = DM9000_TIMER_WUT;
+       add_timer(&db->timer);
+}
+
+struct dm9000_rxhdr {
+       u16     RxStatus;
+       u16     RxLen;
+} __attribute__((__packed__));
+
+/*
+ *  Received a packet and pass to upper layer
+ */
+static void
+dm9000_rx(struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+       struct dm9000_rxhdr rxhdr;
+       struct sk_buff *skb;
+       u8 rxbyte, *rdptr;
+       int GoodPacket;
+       int RxLen;
+
+       /* Check packet ready or not */
+       do {
+               ior(db, DM9000_MRCMDX); /* Dummy read */
+
+               /* Get most updated data */
+               rxbyte = readb(db->io_data);
+
+               /* Status check: this byte must be 0 or 1 */
+               if (rxbyte > DM9000_PKT_RDY) {
+                       printk("status check failed: %d\n", rxbyte);
+                       iow(db, DM9000_RCR, 0x00);      /* Stop Device */
+                       iow(db, DM9000_ISR, IMR_PAR);   /* Stop INT request */
+                       return;
+               }
+
+               if (rxbyte != DM9000_PKT_RDY)
+                       return;
+
+               /* A packet ready now  & Get status/length */
+               GoodPacket = TRUE;
+               writeb(DM9000_MRCMD, db->io_addr);
+
+               (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
+
+               RxLen = rxhdr.RxLen;
+
+               /* Packet Status check */
+               if (RxLen < 0x40) {
+                       GoodPacket = FALSE;
+                       PRINTK1("Bad Packet received (runt)\n");
+               }
+
+               if (RxLen > DM9000_PKT_MAX) {
+                       PRINTK1("RST: RX Len:%x\n", RxLen);
+               }
+
+               if (rxhdr.RxStatus & 0xbf00) {
+                       GoodPacket = FALSE;
+                       if (rxhdr.RxStatus & 0x100) {
+                               PRINTK1("fifo error\n");
+                               db->stats.rx_fifo_errors++;
+                       }
+                       if (rxhdr.RxStatus & 0x200) {
+                               PRINTK1("crc error\n");
+                               db->stats.rx_crc_errors++;
+                       }
+                       if (rxhdr.RxStatus & 0x8000) {
+                               PRINTK1("length error\n");
+                               db->stats.rx_length_errors++;
+                       }
+               }
+
+               /* Move data from DM9000 */
+               if (GoodPacket
+                   && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
+                       skb->dev = dev;
+                       skb_reserve(skb, 2);
+                       rdptr = (u8 *) skb_put(skb, RxLen - 4);
+
+                       /* Read received packet from RX SRAM */
+
+                       (db->inblk)(db->io_data, rdptr, RxLen);
+                       db->stats.rx_bytes += RxLen;
+
+                       /* Pass to upper layer */
+                       skb->protocol = eth_type_trans(skb, dev);
+                       netif_rx(skb);
+                       db->stats.rx_packets++;
+
+               } else {
+                       /* need to dump the packet's data */
+
+                       (db->dumpblk)(db->io_data, RxLen);
+               }
+       } while (rxbyte == DM9000_PKT_RDY);
+}
+
+/*
+ *  Read a word data from SROM
+ */
+static u16
+read_srom_word(board_info_t * db, int offset)
+{
+       iow(db, DM9000_EPAR, offset);
+       iow(db, DM9000_EPCR, EPCR_ERPRR);
+       mdelay(8);              /* according to the datasheet 200us should be enough,
+                                  but it doesn't work */
+       iow(db, DM9000_EPCR, 0x0);
+       return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
+}
+
+#ifdef DM9000_PROGRAM_EEPROM
+/*
+ * Write a word data to SROM
+ */
+static void
+write_srom_word(board_info_t * db, int offset, u16 val)
+{
+       iow(db, DM9000_EPAR, offset);
+       iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
+       iow(db, DM9000_EPDRL, (val & 0xff));
+       iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
+       mdelay(8);              /* same shit */
+       iow(db, DM9000_EPCR, 0);
+}
+
+/*
+ * Only for development:
+ * Here we write static data to the eeprom in case
+ * we don't have valid content on a new board
+ */
+static void
+program_eeprom(board_info_t * db)
+{
+       u16 eeprom[] = { 0x0c00, 0x007f, 0x1300,        /* MAC Address */
+               0x0000,         /* Autoload: accept nothing */
+               0x0a46, 0x9000, /* Vendor / Product ID */
+               0x0000,         /* pin control */
+               0x0000,
+       };                      /* Wake-up mode control */
+       int i;
+       for (i = 0; i < 8; i++)
+               write_srom_word(db, i, eeprom[i]);
+}
+#endif
+
+
+/*
+ *  Calculate the CRC valude of the Rx packet
+ *  flag = 1 : return the reverse CRC (for the received packet CRC)
+ *         0 : return the normal CRC (for Hash Table index)
+ */
+
+static unsigned long
+cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
+{
+
+       u32 crc = ether_crc_le(Len, Data);
+
+       if (flag)
+               return ~crc;
+
+       return crc;
+}
+
+/*
+ *  Set DM9000 multicast address
+ */
+static void
+dm9000_hash_table(struct net_device *dev)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+       struct dev_mc_list *mcptr = dev->mc_list;
+       int mc_cnt = dev->mc_count;
+       u32 hash_val;
+       u16 i, oft, hash_table[4];
+       unsigned long flags;
+
+       PRINTK2("dm9000_hash_table()\n");
+
+       spin_lock_irqsave(&db->lock,flags);
+
+       for (i = 0, oft = 0x10; i < 6; i++, oft++)
+               iow(db, oft, dev->dev_addr[i]);
+
+       /* Clear Hash Table */
+       for (i = 0; i < 4; i++)
+               hash_table[i] = 0x0;
+
+       /* broadcast address */
+       hash_table[3] = 0x8000;
+
+       /* the multicast address in Hash Table : 64 bits */
+       for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
+               hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
+               hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
+       }
+
+       /* Write the hash table to MAC MD table */
+       for (i = 0, oft = 0x16; i < 4; i++) {
+               iow(db, oft++, hash_table[i] & 0xff);
+               iow(db, oft++, (hash_table[i] >> 8) & 0xff);
+       }
+
+       spin_unlock_irqrestore(&db->lock,flags);
+}
+
+
+/*
+ *   Read a word from phyxcer
+ */
+static int
+dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+       unsigned long flags;
+       int ret;
+
+       spin_lock_irqsave(&db->lock,flags);
+       /* Fill the phyxcer register into REG_0C */
+       iow(db, DM9000_EPAR, DM9000_PHY | reg);
+
+       iow(db, DM9000_EPCR, 0xc);      /* Issue phyxcer read command */
+       udelay(100);            /* Wait read complete */
+       iow(db, DM9000_EPCR, 0x0);      /* Clear phyxcer read command */
+
+       /* The read data keeps on REG_0D & REG_0E */
+       ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
+
+       spin_unlock_irqrestore(&db->lock,flags);
+
+       return ret;
+}
+
+/*
+ *   Write a word to phyxcer
+ */
+static void
+dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
+{
+       board_info_t *db = (board_info_t *) dev->priv;
+       unsigned long flags;
+
+       spin_lock_irqsave(&db->lock,flags);
+
+       /* Fill the phyxcer register into REG_0C */
+       iow(db, DM9000_EPAR, DM9000_PHY | reg);
+
+       /* Fill the written data into REG_0D & REG_0E */
+       iow(db, DM9000_EPDRL, (value & 0xff));
+       iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
+
+       iow(db, DM9000_EPCR, 0xa);      /* Issue phyxcer write command */
+       udelay(500);            /* Wait write complete */
+       iow(db, DM9000_EPCR, 0x0);      /* Clear phyxcer write command */
+
+       spin_unlock_irqrestore(&db->lock,flags);
+}
+
+static int
+dm9000_drv_suspend(struct device *dev, u32 state, u32 level)
+{
+       struct net_device *ndev = dev_get_drvdata(dev);
+
+       if (ndev && level == SUSPEND_DISABLE) {
+               if (netif_running(ndev)) {
+                       netif_device_detach(ndev);
+                       dm9000_shutdown(ndev);
+               }
+       }
+       return 0;
+}
+
+static int
+dm9000_drv_resume(struct device *dev, u32 level)
+{
+       struct net_device *ndev = dev_get_drvdata(dev);
+       board_info_t *db = (board_info_t *) ndev->priv;
+
+       if (ndev && level == RESUME_ENABLE) {
+
+               if (netif_running(ndev)) {
+                       dm9000_reset(db);
+                       dm9000_init_dm9000(ndev);
+
+                       netif_device_attach(ndev);
+               }
+       }
+       return 0;
+}
+
+static int
+dm9000_drv_remove(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct net_device *ndev = dev_get_drvdata(dev);
+
+       dev_set_drvdata(dev, NULL);
+
+       unregister_netdev(ndev);
+       dm9000_release_board(pdev, (board_info_t *) ndev->priv);
+       kfree(ndev);            /* free device structure */
+
+       PRINTK1("clean_module() exit\n");
+
+       return 0;
+}
+
+static struct device_driver dm9000_driver = {
+       .name    = "dm9000",
+       .bus     = &platform_bus_type,
+       .probe   = dm9000_probe,
+       .remove  = dm9000_drv_remove,
+       .suspend = dm9000_drv_suspend,
+       .resume  = dm9000_drv_resume,
+};
+
+static int __init
+dm9000_init(void)
+{
+       return driver_register(&dm9000_driver); /* search board and register */
+}
+
+static void __exit
+dm9000_cleanup(void)
+{
+       driver_unregister(&dm9000_driver);
+}
+
+module_init(dm9000_init);
+module_exit(dm9000_cleanup);
+
+MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
+MODULE_DESCRIPTION("Davicom DM9000 network driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/dm9000.h b/drivers/net/dm9000.h
new file mode 100644 (file)
index 0000000..82cad36
--- /dev/null
@@ -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 --git a/include/linux/dm9000.h b/include/linux/dm9000.h
new file mode 100644 (file)
index 0000000..0008e2a
--- /dev/null
@@ -0,0 +1,36 @@
+/* include/linux/dm9000.h
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ *   Ben Dooks <ben@simtec.co.uk>
+ *
+ * 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 */
+