diff options
Diffstat (limited to 'drivers/net/dm9000.c')
| -rw-r--r-- | drivers/net/dm9000.c | 1219 |
1 files changed, 1219 insertions, 0 deletions
diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c new file mode 100644 index 000000000000..5fddc0ff8878 --- /dev/null +++ b/drivers/net/dm9000.c @@ -0,0 +1,1219 @@ +/* + * dm9000.c: Version 1.2 03/18/2003 + * + * A Davicom DM9000 ISA NIC fast Ethernet driver for Linux. + * Copyright (C) 1997 Sten Wang + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved. + * + * V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match + * 06/22/2001 Support DM9801 progrmming + * E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000 + * E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200 + * R17 = (R17 & 0xfff0) | NF + 3 + * E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200 + * R17 = (R17 & 0xfff0) | NF + * + * v1.00 modify by simon 2001.9.5 + * change for kernel 2.4.x + * + * v1.1 11/09/2001 fix force mode bug + * + * v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>: + * Fixed phy reset. + * Added tx/rx 32 bit mode. + * Cleaned up for kernel merge. + * + * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de> + * Port to 2.6 kernel + * + * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk> + * Cleanup of code to remove ifdefs + * Allowed platform device data to influence access width + * Reformatting areas of code + * + * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de> + * * removed 2.4 style module parameters + * * removed removed unused stat counter and fixed + * net_device_stats + * * introduced tx_timeout function + * * reworked locking + */ + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/init.h> +#include <linux/skbuff.h> +#include <linux/version.h> +#include <linux/spinlock.h> +#include <linux/crc32.h> +#include <linux/mii.h> +#include <linux/dm9000.h> +#include <linux/delay.h> + +#include <asm/delay.h> +#include <asm/irq.h> +#include <asm/io.h> + +#include "dm9000.h" + +/* Board/System/Debug information/definition ---------------- */ + +#define DM9000_PHY 0x40 /* PHY address 0x01 */ + +#define TRUE 1 +#define FALSE 0 + +#define CARDNAME "dm9000" +#define PFX CARDNAME ": " + +#define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */ + +#define DM9000_DEBUG 0 + +#if DM9000_DEBUG > 2 +#define PRINTK3(args...) printk(CARDNAME ": " args) +#else +#define PRINTK3(args...) do { } while(0) +#endif + +#if DM9000_DEBUG > 1 +#define PRINTK2(args...) printk(CARDNAME ": " args) +#else +#define PRINTK2(args...) do { } while(0) +#endif + +#if DM9000_DEBUG > 0 +#define PRINTK1(args...) printk(CARDNAME ": " args) +#define PRINTK(args...) printk(CARDNAME ": " args) +#else +#define PRINTK1(args...) do { } while(0) +#define PRINTK(args...) printk(KERN_DEBUG args) +#endif + +/* + * Transmit timeout, default 5 seconds. + */ +static int watchdog = 5000; +module_param(watchdog, int, 0400); +MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); + +/* Structure/enum declaration ------------------------------- */ +typedef struct board_info { + + void __iomem *io_addr; /* Register I/O base address */ + void __iomem *io_data; /* Data I/O address */ + u16 irq; /* IRQ */ + + u16 tx_pkt_cnt; + u16 queue_pkt_len; + u16 queue_start_addr; + u16 dbug_cnt; + u8 io_mode; /* 0:word, 2:byte */ + u8 phy_addr; + + void (*inblk)(void __iomem *port, void *data, int length); + void (*outblk)(void __iomem *port, void *data, int length); + void (*dumpblk)(void __iomem *port, int length); + + struct resource *addr_res; /* resources found */ + struct resource *data_res; + struct resource *addr_req; /* resources requested */ + struct resource *data_req; + struct resource *irq_res; + + struct timer_list timer; + struct net_device_stats stats; + unsigned char srom[128]; + spinlock_t lock; + + struct mii_if_info mii; + u32 msg_enable; +} board_info_t; + +/* function declaration ------------------------------------- */ +static int dm9000_probe(struct device *); +static int dm9000_open(struct net_device *); +static int dm9000_start_xmit(struct sk_buff *, struct net_device *); +static int dm9000_stop(struct net_device *); +static int dm9000_do_ioctl(struct net_device *, struct ifreq *, int); + + +static void dm9000_timer(unsigned long); +static void dm9000_init_dm9000(struct net_device *); + +static struct net_device_stats *dm9000_get_stats(struct net_device *); + +static irqreturn_t dm9000_interrupt(int, void *, struct pt_regs *); + +static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg); +static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, + int value); +static u16 read_srom_word(board_info_t *, int); +static void dm9000_rx(struct net_device *); +static void dm9000_hash_table(struct net_device *); + +//#define DM9000_PROGRAM_EEPROM +#ifdef DM9000_PROGRAM_EEPROM +static void program_eeprom(board_info_t * db); +#endif +/* DM9000 network board routine ---------------------------- */ + +static void +dm9000_reset(board_info_t * db) +{ + PRINTK1("dm9000x: resetting\n"); + /* RESET device */ + writeb(DM9000_NCR, db->io_addr); + udelay(200); + writeb(NCR_RST, db->io_data); + udelay(200); +} + +/* + * Read a byte from I/O port + */ +static u8 +ior(board_info_t * db, int reg) +{ + writeb(reg, db->io_addr); + return readb(db->io_data); +} + +/* + * Write a byte to I/O port + */ + +static void +iow(board_info_t * db, int reg, int value) +{ + writeb(reg, db->io_addr); + writeb(value, db->io_data); +} + +/* routines for sending block to chip */ + +static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count) +{ + writesb(reg, data, count); +} + +static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count) +{ + writesw(reg, data, (count+1) >> 1); +} + +static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count) +{ + writesl(reg, data, (count+3) >> 2); +} + +/* input block from chip to memory */ + +static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count) +{ + readsb(reg, data, count); +} + + +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->addr_res); + 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"); |