+++ /dev/null
-/* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
-
- Written 1994, 1995 by David C. Davies.
-
-
- Copyright 1994 David C. Davies
- and
- United States Government
- (as represented by the Director, National Security Agency).
-
- Copyright 1995 Digital Equipment Corporation.
-
-
- This software may be used and distributed according to the terms of
- the GNU General Public License, incorporated herein by reference.
-
- This driver is written for the Digital Equipment Corporation series
- of DEPCA and EtherWORKS ethernet cards:
-
- DEPCA (the original)
- DE100
- DE101
- DE200 Turbo
- DE201 Turbo
- DE202 Turbo (TP BNC)
- DE210
- DE422 (EISA)
-
- The driver has been tested on DE100, DE200 and DE202 cards in a
- relatively busy network. The DE422 has been tested a little.
-
- This driver will NOT work for the DE203, DE204 and DE205 series of
- cards, since they have a new custom ASIC in place of the AMD LANCE
- chip. See the 'ewrk3.c' driver in the Linux source tree for running
- those cards.
-
- I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
- a DECstation 5000/200.
-
- The author may be reached at davies@maniac.ultranet.com
-
- =========================================================================
-
- The driver was originally based on the 'lance.c' driver from Donald
- Becker which is included with the standard driver distribution for
- linux. V0.4 is a complete re-write with only the kernel interface
- remaining from the original code.
-
- 1) Lance.c code in /linux/drivers/net/
- 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
- AMD, 1992 [(800) 222-9323].
- 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
- AMD, Pub. #17881, May 1993.
- 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
- AMD, Pub. #16907, May 1992
- 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
- Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
- 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
- Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
- 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
- Digital Equipment Corporation, 1989
- 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
- Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
-
-
- Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
- driver.
-
- The original DEPCA card requires that the ethernet ROM address counter
- be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
- only done when a 0x08 is read as the first address octet (to minimise
- the chances of writing over some other hardware's I/O register). The
- NICSR accesses have been changed to byte accesses for all the cards
- supported by this driver, since there is only one useful bit in the MSB
- (remote boot timeout) and it is not used. Also, there is a maximum of
- only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
- help debugging all this (and holding my feet to the fire until I got it
- right).
-
- The DE200 series boards have on-board 64kB RAM for use as a shared
- memory network buffer. Only the DE100 cards make use of a 2kB buffer
- mode which has not been implemented in this driver (only the 32kB and
- 64kB modes are supported [16kB/48kB for the original DEPCA]).
-
- At the most only 2 DEPCA cards can be supported on the ISA bus because
- there is only provision for two I/O base addresses on each card (0x300
- and 0x200). The I/O address is detected by searching for a byte sequence
- in the Ethernet station address PROM at the expected I/O address for the
- Ethernet PROM. The shared memory base address is 'autoprobed' by
- looking for the self test PROM and detecting the card name. When a
- second DEPCA is detected, information is placed in the base_addr
- variable of the next device structure (which is created if necessary),
- thus enabling ethif_probe initialization for the device. More than 2
- EISA cards can be supported, but care will be needed assigning the
- shared memory to ensure that each slot has the correct IRQ, I/O address
- and shared memory address assigned.
-
- ************************************************************************
-
- NOTE: If you are using two ISA DEPCAs, it is important that you assign
- the base memory addresses correctly. The driver autoprobes I/O 0x300
- then 0x200. The base memory address for the first device must be less
- than that of the second so that the auto probe will correctly assign the
- I/O and memory addresses on the same card. I can't think of a way to do
- this unambiguously at the moment, since there is nothing on the cards to
- tie I/O and memory information together.
-
- I am unable to test 2 cards together for now, so this code is
- unchecked. All reports, good or bad, are welcome.
-
- ************************************************************************
-
- The board IRQ setting must be at an unused IRQ which is auto-probed
- using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
- {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
- really IRQ9 in machines with 16 IRQ lines.
-
- No 16MB memory limitation should exist with this driver as DMA is not
- used and the common memory area is in low memory on the network card (my
- current system has 20MB and I've not had problems yet).
-
- The ability to load this driver as a loadable module has been added. To
- utilise this ability, you have to do <8 things:
-
- 0) have a copy of the loadable modules code installed on your system.
- 1) copy depca.c from the /linux/drivers/net directory to your favourite
- temporary directory.
- 2) if you wish, edit the source code near line 1530 to reflect the I/O
- address and IRQ you're using (see also 5).
- 3) compile depca.c, but include -DMODULE in the command line to ensure
- that the correct bits are compiled (see end of source code).
- 4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
- kernel with the depca configuration turned off and reboot.
- 5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
- [Alan Cox: Changed the code to allow command line irq/io assignments]
- [Dave Davies: Changed the code to allow command line mem/name
- assignments]
- 6) run the net startup bits for your eth?? interface manually
- (usually /etc/rc.inet[12] at boot time).
- 7) enjoy!
-
- Note that autoprobing is not allowed in loadable modules - the system is
- already up and running and you're messing with interrupts.
-
- To unload a module, turn off the associated interface
- 'ifconfig eth?? down' then 'rmmod depca'.
-
- To assign a base memory address for the shared memory when running as a
- loadable module, see 5 above. To include the adapter name (if you have
- no PROM but know the card name) also see 5 above. Note that this last
- option will not work with kernel built-in depca's.
-
- The shared memory assignment for a loadable module makes sense to avoid
- the 'memory autoprobe' picking the wrong shared memory (for the case of
- 2 depca's in a PC).
-
- ************************************************************************
- Support for MCA EtherWORKS cards added 11-3-98. (MCA since deleted)
- Verified to work with up to 2 DE212 cards in a system (although not
- fully stress-tested).
-
- Revision History
- ----------------
-
- Version Date Description
-
- 0.1 25-jan-94 Initial writing.
- 0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
- 0.3 1-feb-94 Added multiple DEPCA support.
- 0.31 4-feb-94 Added DE202 recognition.
- 0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
- 0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
- Add jabber packet fix from murf@perftech.com
- and becker@super.org
- 0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
- 0.35 8-mar-94 Added DE201 recognition. Tidied up.
- 0.351 30-apr-94 Added EISA support. Added DE422 recognition.
- 0.36 16-may-94 DE422 fix released.
- 0.37 22-jul-94 Added MODULE support
- 0.38 15-aug-94 Added DBR ROM switch in depca_close().
- Multi DEPCA bug fix.
- 0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
- 0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
- 0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
- 0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
- <stromain@alf.dec.com>
- 0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
- 0.385 3-apr-95 Fix a recognition bug reported by
- <ryan.niemi@lastfrontier.com>
- 0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
- 0.40 25-May-95 Rewrite for portability & updated.
- ALPHA support from <jestabro@amt.tay1.dec.com>
- 0.41 26-Jun-95 Added verify_area() calls in depca_ioctl() from
- suggestion by <heiko@colossus.escape.de>
- 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
- modules.
- Add 'adapter_name' for loadable modules when no PROM.
- Both above from a suggestion by
- <pchen@woodruffs121.residence.gatech.edu>.
- Add new multicasting code.
- 0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
- 0.422 29-Apr-96 Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
- 0.423 7-Jun-96 Fix module load bug <kmg@barco.be>
- 0.43 16-Aug-96 Update alloc_device() to conform to de4x5.c
- 0.44 1-Sep-97 Fix *_probe() to test check_region() first - bug
- reported by <mmogilvi@elbert.uccs.edu>
- 0.45 3-Nov-98 Added support for MCA EtherWORKS (DE210/DE212) cards
- by <tymm@computer.org>
- 0.451 5-Nov-98 Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
- 0.5 14-Nov-98 Re-spin for 2.1.x kernels.
- 0.51 27-Jun-99 Correct received packet length for CRC from
- report by <worm@dkik.dk>
- 0.52 16-Oct-00 Fixes for 2.3 io memory accesses
- Fix show-stopper (ints left masked) in depca_interrupt
- by <peterd@pnd-pc.demon.co.uk>
- 0.53 12-Jan-01 Release resources on failure, bss tidbits
- by acme@conectiva.com.br
- 0.54 08-Nov-01 use library crc32 functions
- by Matt_Domsch@dell.com
- 0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
-
- =========================================================================
-*/
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/crc32.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/time.h>
-#include <linux/types.h>
-#include <linux/unistd.h>
-#include <linux/ctype.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/bitops.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#ifdef CONFIG_EISA
-#include <linux/eisa.h>
-#endif
-
-#include "depca.h"
-
-static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
-
-#ifdef DEPCA_DEBUG
-static int depca_debug = DEPCA_DEBUG;
-#else
-static int depca_debug = 1;
-#endif
-
-#define DEPCA_NDA 0xffe0 /* No Device Address */
-
-#define TX_TIMEOUT (1*HZ)
-
-/*
-** Ethernet PROM defines
-*/
-#define PROBE_LENGTH 32
-#define ETH_PROM_SIG 0xAA5500FFUL
-
-/*
-** Set the number of Tx and Rx buffers. Ensure that the memory requested
-** here is <= to the amount of shared memory set up by the board switches.
-** The number of descriptors MUST BE A POWER OF 2.
-**
-** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
-*/
-#define NUM_RX_DESC 8 /* Number of RX descriptors */
-#define NUM_TX_DESC 8 /* Number of TX descriptors */
-#define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
-#define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
-
-/*
-** EISA bus defines
-*/
-#define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
-
-/*
-** ISA Bus defines
-*/
-#define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
-#define DEPCA_TOTAL_SIZE 0x10
-
-static struct {
- u_long iobase;
- struct platform_device *device;
-} depca_io_ports[] = {
- { 0x300, NULL },
- { 0x200, NULL },
- { 0 , NULL },
-};
-
-/*
-** Name <-> Adapter mapping
-*/
-#define DEPCA_SIGNATURE {"DEPCA",\
- "DE100","DE101",\
- "DE200","DE201","DE202",\
- "DE210","DE212",\
- "DE422",\
- ""}
-
-static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
-
-enum depca_type {
- DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
-};
-
-static char depca_string[] = "depca";
-
-static int depca_device_remove (struct device *device);
-
-#ifdef CONFIG_EISA
-static struct eisa_device_id depca_eisa_ids[] = {
- { "DEC4220", de422 },
- { "" }
-};
-MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
-
-static int depca_eisa_probe (struct device *device);
-
-static struct eisa_driver depca_eisa_driver = {
- .id_table = depca_eisa_ids,
- .driver = {
- .name = depca_string,
- .probe = depca_eisa_probe,
- .remove = depca_device_remove
- }
-};
-#endif
-
-static int depca_isa_probe (struct platform_device *);
-
-static int depca_isa_remove(struct platform_device *pdev)
-{
- return depca_device_remove(&pdev->dev);
-}
-
-static struct platform_driver depca_isa_driver = {
- .probe = depca_isa_probe,
- .remove = depca_isa_remove,
- .driver = {
- .name = depca_string,
- },
-};
-
-/*
-** Miscellaneous info...
-*/
-#define DEPCA_STRLEN 16
-
-/*
-** Memory Alignment. Each descriptor is 4 longwords long. To force a
-** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
-** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
-** and hence the RX descriptor ring's first entry.
-*/
-#define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
-#define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
-#define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
-
-/*
-** The DEPCA Rx and Tx ring descriptors.
-*/
-struct depca_rx_desc {
- volatile s32 base;
- s16 buf_length; /* This length is negative 2's complement! */
- s16 msg_length; /* This length is "normal". */
-};
-
-struct depca_tx_desc {
- volatile s32 base;
- s16 length; /* This length is negative 2's complement! */
- s16 misc; /* Errors and TDR info */
-};
-
-#define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
- to LANCE memory address space */
-
-/*
-** The Lance initialization block, described in databook, in common memory.
-*/
-struct depca_init {
- u16 mode; /* Mode register */
- u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
- u8 mcast_table[8]; /* Multicast Hash Table. */
- u32 rx_ring; /* Rx ring base pointer & ring length */
- u32 tx_ring; /* Tx ring base pointer & ring length */
-};
-
-#define DEPCA_PKT_STAT_SZ 16
-#define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
- increase DEPCA_PKT_STAT_SZ */
-struct depca_private {
- char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
- enum depca_type adapter; /* Adapter type */
- enum {
- DEPCA_BUS_ISA = 1,
- DEPCA_BUS_EISA,
- } depca_bus; /* type of bus */
- struct depca_init init_block; /* Shadow Initialization block */
-/* CPU address space fields */
- struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
- struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
- void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
- void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
- void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
- u_long mem_start; /* Bus address of device RAM (before remap) */
- u_long mem_len; /* device memory size */
-/* Device address space fields */
- u_long device_ram_start; /* Start of RAM in device addr space */
-/* Offsets used in both address spaces */
- u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
- u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
- u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
-/* Kernel-only (not device) fields */
- int rx_new, tx_new; /* The next free ring entry */
- int rx_old, tx_old; /* The ring entries to be free()ed. */
- spinlock_t lock;
- struct { /* Private stats counters */
- u32 bins[DEPCA_PKT_STAT_SZ];
- u32 unicast;
- u32 multicast;
- u32 broadcast;
- u32 excessive_collisions;
- u32 tx_underruns;
- u32 excessive_underruns;
- } pktStats;
- int txRingMask; /* TX ring mask */
- int rxRingMask; /* RX ring mask */
- s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
- s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
-};
-
-/*
-** The transmit ring full condition is described by the tx_old and tx_new
-** pointers by:
-** tx_old = tx_new Empty ring
-** tx_old = tx_new+1 Full ring
-** tx_old+txRingMask = tx_new Full ring (wrapped condition)
-*/
-#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
- lp->tx_old+lp->txRingMask-lp->tx_new:\
- lp->tx_old -lp->tx_new-1)
-
-/*
-** Public Functions
-*/
-static int depca_open(struct net_device *dev);
-static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
-static irqreturn_t depca_interrupt(int irq, void *dev_id);
-static int depca_close(struct net_device *dev);
-static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
-static void depca_tx_timeout(struct net_device *dev);
-static void set_multicast_list(struct net_device *dev);
-
-/*
-** Private functions
-*/
-static void depca_init_ring(struct net_device *dev);
-static int depca_rx(struct net_device *dev);
-static int depca_tx(struct net_device *dev);
-
-static void LoadCSRs(struct net_device *dev);
-static int InitRestartDepca(struct net_device *dev);
-static int DepcaSignature(char *name, u_long paddr);
-static int DevicePresent(u_long ioaddr);
-static int get_hw_addr(struct net_device *dev);
-static void SetMulticastFilter(struct net_device *dev);
-static int load_packet(struct net_device *dev, struct sk_buff *skb);
-static void depca_dbg_open(struct net_device *dev);
-
-static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
-static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
-static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
-static u_char *depca_irq;
-
-static int irq;
-static int io;
-static char *adapter_name;
-static int mem; /* For loadable module assignment
- use insmod mem=0x????? .... */
-module_param (irq, int, 0);
-module_param (io, int, 0);
-module_param (adapter_name, charp, 0);
-module_param (mem, int, 0);
-MODULE_PARM_DESC(irq, "DEPCA IRQ number");
-MODULE_PARM_DESC(io, "DEPCA I/O base address");
-MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
-MODULE_PARM_DESC(mem, "DEPCA shared memory address");
-MODULE_LICENSE("GPL");
-
-/*
-** Miscellaneous defines...
-*/
-#define STOP_DEPCA \
- outw(CSR0, DEPCA_ADDR);\
- outw(STOP, DEPCA_DATA)
-
-static const struct net_device_ops depca_netdev_ops = {
- .ndo_open = depca_open,
- .ndo_start_xmit = depca_start_xmit,
- .ndo_stop = depca_close,
- .ndo_set_rx_mode = set_multicast_list,
- .ndo_do_ioctl = depca_ioctl,
- .ndo_tx_timeout = depca_tx_timeout,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __init depca_hw_init (struct net_device *dev, struct device *device)
-{
- struct depca_private *lp;
- int i, j, offset, netRAM, mem_len, status = 0;
- s16 nicsr;
- u_long ioaddr;
- u_long mem_start;
-
- /*
- * We are now supposed to enter this function with the
- * following fields filled with proper values :
- *
- * dev->base_addr
- * lp->mem_start
- * lp->depca_bus
- * lp->adapter
- *
- * dev->irq can be set if known from device configuration (on
- * MCA or EISA) or module option. Otherwise, it will be auto
- * detected.
- */
-
- ioaddr = dev->base_addr;
-
- STOP_DEPCA;
-
- nicsr = inb(DEPCA_NICSR);
- nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
- outb(nicsr, DEPCA_NICSR);
-
- if (inw(DEPCA_DATA) != STOP) {
- return -ENXIO;
- }
-
- lp = netdev_priv(dev);
- mem_start = lp->mem_start;
-
- if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
- return -ENXIO;
-
- printk("%s: %s at 0x%04lx",
- dev_name(device), depca_signature[lp->adapter], ioaddr);
-
- switch (lp->depca_bus) {
-#ifdef CONFIG_EISA
- case DEPCA_BUS_EISA:
- printk(" (EISA slot %d)", to_eisa_device(device)->slot);
- break;
-#endif
-
- case DEPCA_BUS_ISA:
- break;
-
- default:
- printk("Unknown DEPCA bus %d\n", lp->depca_bus);
- return -ENXIO;
- }
-
- printk(", h/w address ");
- status = get_hw_addr(dev);
- printk("%pM", dev->dev_addr);
- if (status != 0) {
- printk(" which has an Ethernet PROM CRC error.\n");
- return -ENXIO;
- }
-
- /* Set up the maximum amount of network RAM(kB) */
- netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
- if ((nicsr & _128KB) && (lp->adapter == de422))
- netRAM = 128;
-
- /* Shared Memory Base Address */
- if (nicsr & BUF) {
- nicsr &= ~BS; /* DEPCA RAM in top 32k */
- netRAM -= 32;
- mem_start += 0x8000;
- }
-
- if ((mem_len = (NUM_RX_DESC * (sizeof(struct depca_rx_desc) + RX_BUFF_SZ) + NUM_TX_DESC * (sizeof(struct depca_tx_desc) + TX_BUFF_SZ) + sizeof(struct depca_init)))
- > (netRAM << 10)) {
- printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
- return -ENXIO;
- }
-
- printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
-
- /* Enable the shadow RAM. */
- if (lp->adapter != DEPCA) {
- nicsr |= SHE;
- outb(nicsr, DEPCA_NICSR);
- }
-
- spin_lock_init(&lp->lock);
- sprintf(lp->adapter_name, "%s (%s)",
- depca_signature[lp->adapter], dev_name(device));
- status = -EBUSY;
-
- /* Initialisation Block */
- if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
- printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
- goto out_priv;
- }
-
- status = -EIO;
- lp->sh_mem = ioremap(mem_start, mem_len);
- if (lp->sh_mem == NULL) {
- printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
- goto out1;
- }
-
- lp->mem_start = mem_start;
- lp->mem_len = mem_len;
- lp->device_ram_start = mem_start & LA_MASK;
-
- offset = 0;
- offset += sizeof(struct depca_init);
-
- /* Tx & Rx descriptors (aligned to a quadword boundary) */
- offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
- lp->rx_ring = lp->sh_mem + offset;
- lp->rx_ring_offset = offset;
-
- offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
- lp->tx_ring = lp->sh_mem + offset;
- lp->tx_ring_offset = offset;
-
- offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
-
- lp->buffs_offset = offset;
-
- /* Finish initialising the ring information. */
- lp->rxRingMask = NUM_RX_DESC - 1;
- lp->txRingMask = NUM_TX_DESC - 1;
-
- /* Calculate Tx/Rx RLEN size for the descriptors. */
- for (i = 0, j = lp->rxRingMask; j > 0; i++) {
- j >>= 1;
- }
- lp->rx_rlen = (s32) (i << 29);
- for (i = 0, j = lp->txRingMask; j > 0; i++) {
- j >>= 1;
- }
- lp->tx_rlen = (s32) (i << 29);
-
- /* Load the initialisation block */
- depca_init_ring(dev);
-
- /* Initialise the control and status registers */
- LoadCSRs(dev);
-
- /* Enable DEPCA board interrupts for autoprobing */
- nicsr = ((nicsr & ~IM) | IEN);
- outb(nicsr, DEPCA_NICSR);
-
- /* To auto-IRQ we enable the initialization-done and DMA err,
- interrupts. For now we will always get a DMA error. */
- if (dev->irq < 2) {
- unsigned char irqnum;
- unsigned long irq_mask, delay;
-
- irq_mask = probe_irq_on();
-
- /* Assign the correct irq list */
- switch (lp->adapter) {
- case DEPCA:
- case de100:
- case de101:
- depca_irq = de1xx_irq;
- break;
- case de200:
- case de201:
- case de202:
- case de210:
- case de212:
- depca_irq = de2xx_irq;
- break;
- case de422:
- depca_irq = de422_irq;
- break;
-
- default:
- break; /* Not reached */
- }
-
- /* Trigger an initialization just for the interrupt. */
- outw(INEA | INIT, DEPCA_DATA);
-
- delay = jiffies + HZ/50;
- while (time_before(jiffies, delay))
- yield();
-
- irqnum = probe_irq_off(irq_mask);
-
- status = -ENXIO;
- if (!irqnum) {
- printk(" and failed to detect IRQ line.\n");
- goto out2;
- } else {
- for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
- if (irqnum == depca_irq[i]) {
- dev->irq = irqnum;
- printk(" and uses IRQ%d.\n", dev->irq);
- }
-
- if (!dev->irq) {
- printk(" but incorrect IRQ line detected.\n");
- goto out2;
- }
- }
- } else {
- printk(" and assigned IRQ%d.\n", dev->irq);
- }
-
- if (depca_debug > 1) {
- printk(version);
- }
-
- /* The DEPCA-specific entries in the device structure. */
- dev->netdev_ops = &depca_netdev_ops;
- dev->watchdog_timeo = TX_TIMEOUT;
-
- dev->mem_start = 0;
-
- dev_set_drvdata(device, dev);
- SET_NETDEV_DEV (dev, device);
-
- status = register_netdev(dev);
- if (status == 0)
- return 0;
-out2:
- iounmap(lp->sh_mem);
-out1:
- release_mem_region (mem_start, mem_len);
-out_priv:
- return status;
-}
-
-
-static int depca_open(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- u_long ioaddr = dev->base_addr;
- s16 nicsr;
- int status = 0;
-
- STOP_DEPCA;
- nicsr = inb(DEPCA_NICSR);
-
- /* Make sure the shadow RAM is enabled */
- if (lp->adapter != DEPCA) {
- nicsr |= SHE;
- outb(nicsr, DEPCA_NICSR);
- }
-
- /* Re-initialize the DEPCA... */
- depca_init_ring(dev);
- LoadCSRs(dev);
-
- depca_dbg_open(dev);
-
- if (request_irq(dev->irq, depca_interrupt, 0, lp->adapter_name, dev)) {
- printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
- status = -EAGAIN;
- } else {
-
- /* Enable DEPCA board interrupts and turn off LED */
- nicsr = ((nicsr & ~IM & ~LED) | IEN);
- outb(nicsr, DEPCA_NICSR);
- outw(CSR0, DEPCA_ADDR);
-
- netif_start_queue(dev);
-
- status = InitRestartDepca(dev);
-
- if (depca_debug > 1) {
- printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
- printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
- }
- }
- return status;
-}
-
-/* Initialize the lance Rx and Tx descriptor rings. */
-static void depca_init_ring(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- u_int i;
- u_long offset;
-
- /* Lock out other processes whilst setting up the hardware */
- netif_stop_queue(dev);
-
- lp->rx_new = lp->tx_new = 0;
- lp->rx_old = lp->tx_old = 0;
-
- /* Initialize the base address and length of each buffer in the ring */
- for (i = 0; i <= lp->rxRingMask; i++) {
- offset = lp->buffs_offset + i * RX_BUFF_SZ;
- writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
- writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
- lp->rx_buff[i] = lp->sh_mem + offset;
- }
-
- for (i = 0; i <= lp->txRingMask; i++) {
- offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
- writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
- lp->tx_buff[i] = lp->sh_mem + offset;
- }
-
- /* Set up the initialization block */
- lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
- lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
-
- SetMulticastFilter(dev);
-
- for (i = 0; i < ETH_ALEN; i++) {
- lp->init_block.phys_addr[i] = dev->dev_addr[i];
- }
-
- lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
-}
-
-
-static void depca_tx_timeout(struct net_device *dev)
-{
- u_long ioaddr = dev->base_addr;
-
- printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
-
- STOP_DEPCA;
- depca_init_ring(dev);
- LoadCSRs(dev);
- dev->trans_start = jiffies; /* prevent tx timeout */
- netif_wake_queue(dev);
- InitRestartDepca(dev);
-}
-
-
-/*
-** Writes a socket buffer to TX descriptor ring and starts transmission
-*/
-static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- u_long ioaddr = dev->base_addr;
- int status = 0;
-
- /* Transmitter timeout, serious problems. */
- if (skb->len < 1)
- goto out;
-
- if (skb_padto(skb, ETH_ZLEN))
- goto out;
-
- netif_stop_queue(dev);
-
- if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
- status = load_packet(dev, skb);
-
- if (!status) {
- /* Trigger an immediate send demand. */
- outw(CSR0, DEPCA_ADDR);
- outw(INEA | TDMD, DEPCA_DATA);
-
- dev_kfree_skb(skb);
- }
- if (TX_BUFFS_AVAIL)
- netif_start_queue(dev);
- } else
- status = NETDEV_TX_LOCKED;
-
- out:
- return status;
-}
-
-/*
-** The DEPCA interrupt handler.
-*/
-static irqreturn_t depca_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct depca_private *lp;
- s16 csr0, nicsr;
- u_long ioaddr;
-
- if (dev == NULL) {
- printk("depca_interrupt(): irq %d for unknown device.\n", irq);
- return IRQ_NONE;
- }
-
- lp = netdev_priv(dev);
- ioaddr = dev->base_addr;
-
- spin_lock(&lp->lock);
-
- /* mask the DEPCA board interrupts and turn on the LED */
- nicsr = inb(DEPCA_NICSR);
- nicsr |= (IM | LED);
- outb(nicsr, DEPCA_NICSR);
-
- outw(CSR0, DEPCA_ADDR);
- csr0 = inw(DEPCA_DATA);
-
- /* Acknowledge all of the current interrupt sources ASAP. */
- outw(csr0 & INTE, DEPCA_DATA);
-
- if (csr0 & RINT) /* Rx interrupt (packet arrived) */
- depca_rx(dev);
-
- if (csr0 & TINT) /* Tx interrupt (packet sent) */
- depca_tx(dev);
-
- /* Any resources available? */
- if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
- netif_wake_queue(dev);
- }
-
- /* Unmask the DEPCA board interrupts and turn off the LED */
- nicsr = (nicsr & ~IM & ~LED);
- outb(nicsr, DEPCA_NICSR);
-
- spin_unlock(&lp->lock);
- return IRQ_HANDLED;
-}
-
-/* Called with lp->lock held */
-static int depca_rx(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- int i, entry;
- s32 status;
-
- for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
- status = readl(&lp->rx_ring[entry].base) >> 16;
- if (status & R_STP) { /* Remember start of frame */
- lp->rx_old = entry;
- }
- if (status & R_ENP) { /* Valid frame status */
- if (status & R_ERR) { /* There was an error. */
- dev->stats.rx_errors++; /* Update the error stats. */
- if (status & R_FRAM)
- dev->stats.rx_frame_errors++;
- if (status & R_OFLO)
- dev->stats.rx_over_errors++;
- if (status & R_CRC)
- dev->stats.rx_crc_errors++;
- if (status & R_BUFF)
- dev->stats.rx_fifo_errors++;
- } else {
- short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
- struct sk_buff *skb;
-
- skb = netdev_alloc_skb(dev, pkt_len + 2);
- if (skb != NULL) {
- unsigned char *buf;
- skb_reserve(skb, 2); /* 16 byte align the IP header */
- buf = skb_put(skb, pkt_len);
- if (entry < lp->rx_old) { /* Wrapped buffer */
- len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
- memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
- memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
- } else { /* Linear buffer */
- memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
- }
-
- /*
- ** Notify the upper protocol layers that there is another
- ** packet to handle
- */
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
-
- /*
- ** Update stats
- */
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
- for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
- if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
- lp->pktStats.bins[i]++;
- i = DEPCA_PKT_STAT_SZ;
- }
- }
- if (is_multicast_ether_addr(buf)) {
- if (is_broadcast_ether_addr(buf)) {
- lp->pktStats.broadcast++;
- } else {
- lp->pktStats.multicast++;
- }
- } else if (ether_addr_equal(buf,
- dev->dev_addr)) {
- lp->pktStats.unicast++;
- }
-
- lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
- if (lp->pktStats.bins[0] == 0) { /* Reset counters */
- memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
- }
- } else {
- printk("%s: Memory squeeze, deferring packet.\n", dev->name);
- dev->stats.rx_dropped++; /* Really, deferred. */
- break;
- }
- }
- /* Change buffer ownership for this last frame, back to the adapter */
- for (; lp->rx_old != entry; lp->rx_old = (lp->rx_old + 1) & lp->rxRingMask) {
- writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
- }
- writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
- }
-
- /*
- ** Update entry information
- */
- lp->rx_new = (lp->rx_new + 1) & lp->rxRingMask;
- }
-
- return 0;
-}
-
-/*
-** Buffer sent - check for buffer errors.
-** Called with lp->lock held
-*/
-static int depca_tx(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- int entry;
- s32 status;
- u_long ioaddr = dev->base_addr;
-
- for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
- status = readl(&lp->tx_ring[entry].base) >> 16;
-
- if (status < 0) { /* Packet not yet sent! */
- break;
- } else if (status & T_ERR) { /* An error occurred. */
- status = readl(&lp->tx_ring[entry].misc);
- dev->stats.tx_errors++;
- if (status & TMD3_RTRY)
- dev->stats.tx_aborted_errors++;
- if (status & TMD3_LCAR)
- dev->stats.tx_carrier_errors++;
- if (status & TMD3_LCOL)
- dev->stats.tx_window_errors++;
- if (status & TMD3_UFLO)
- dev->stats.tx_fifo_errors++;
- if (status & (TMD3_BUFF | TMD3_UFLO)) {
- /* Trigger an immediate send demand. */
- outw(CSR0, DEPCA_ADDR);
- outw(INEA | TDMD, DEPCA_DATA);
- }
- } else if (status & (T_MORE | T_ONE)) {
- dev->stats.collisions++;
- } else {
- dev->stats.tx_packets++;
- }
-
- /* Update all the pointers */
- lp->tx_old = (lp->tx_old + 1) & lp->txRingMask;
- }
-
- return 0;
-}
-
-static int depca_close(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- s16 nicsr;
- u_long ioaddr = dev->base_addr;
-
- netif_stop_queue(dev);
-
- outw(CSR0, DEPCA_ADDR);
-
- if (depca_debug > 1) {
- printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
- }
-
- /*
- ** We stop the DEPCA here -- it occasionally polls
- ** memory if we don't.
- */
- outw(STOP, DEPCA_DATA);
-
- /*
- ** Give back the ROM in case the user wants to go to DOS
- */
- if (lp->adapter != DEPCA) {
- nicsr = inb(DEPCA_NICSR);
- nicsr &= ~SHE;
- outb(nicsr, DEPCA_NICSR);
- }
-
- /*
- ** Free the associated irq
- */
- free_irq(dev->irq, dev);
- return 0;
-}
-
-static void LoadCSRs(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- u_long ioaddr = dev->base_addr;
-
- outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
- outw((u16) lp->device_ram_start, DEPCA_DATA);
- outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
- outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
- outw(CSR3, DEPCA_ADDR); /* ALE control */
- outw(ACON, DEPCA_DATA);
-
- outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
-}
-
-static int InitRestartDepca(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- u_long ioaddr = dev->base_addr;
- int i, status = 0;
-
- /* Copy the shadow init_block to shared memory */
- memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
-
- outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
- outw(INIT, DEPCA_DATA); /* initialize DEPCA */
-
- /* wait for lance to complete initialisation */
- for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
-
- if (i != 100) {
- /* clear IDON by writing a "1", enable interrupts and start lance */
- outw(IDON | INEA | STRT, DEPCA_DATA);
- if (depca_debug > 2) {
- printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
- }
- } else {
- printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
- status = -1;
- }
-
- return status;
-}
-
-/*
-** Set or clear the multicast filter for this adaptor.
-*/
-static void set_multicast_list(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- u_long ioaddr = dev->base_addr;
-
- netif_stop_queue(dev);
- while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
-
- STOP_DEPCA; /* Temporarily stop the depca. */
- depca_init_ring(dev); /* Initialize the descriptor rings */
-
- if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
- lp->init_block.mode |= PROM;
- } else {
- SetMulticastFilter(dev);
- lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
- }
-
- LoadCSRs(dev); /* Reload CSR3 */
- InitRestartDepca(dev); /* Resume normal operation. */
- netif_start_queue(dev); /* Unlock the TX ring */
-}
-
-/*
-** Calculate the hash code and update the logical address filter
-** from a list of ethernet multicast addresses.
-** Big endian crc one liner is mine, all mine, ha ha ha ha!
-** LANCE calculates its hash codes big endian.
-*/
-static void SetMulticastFilter(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- struct netdev_hw_addr *ha;
- int i, j, bit, byte;
- u16 hashcode;
- u32 crc;
-
- if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
- for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
- lp->init_block.mcast_table[i] = (char) 0xff;
- }
- } else {
- for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
- lp->init_block.mcast_table[i] = 0;
- }
- /* Add multicast addresses */
- netdev_for_each_mc_addr(ha, dev) {
- crc = ether_crc(ETH_ALEN, ha->addr);
- hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
- for (j = 0; j < 5; j++) { /* ... in reverse order. */
- hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
- }
-
- byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
- bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
- lp->init_block.mcast_table[byte] |= bit;
- }
- }
-}
-
-static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
-{
- int status = 0;
-
- if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
- status = -EBUSY;
- goto out;
- }
-
- if (DevicePresent(ioaddr)) {
- status = -ENODEV;
- goto out_release;
- }
-
- if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
- status = -ENOMEM;
- goto out_release;
- }
-
- return 0;
-
- out_release:
- release_region (ioaddr, DEPCA_TOTAL_SIZE);
- out:
- return status;
-}
-
-/*
-** ISA bus I/O device probe
-*/
-
-static void __init depca_platform_probe (void)
-{
- int i;
- struct platform_device *pldev;
-
- for (i = 0; depca_io_ports[i].iobase; i++) {
- depca_io_ports[i].device = NULL;
-
- /* if an address has been specified on the command
- * line, use it (if valid) */
- if (io && io != depca_io_ports[i].iobase)
- continue;
-
- pldev = platform_device_alloc(depca_string, i);
- if (!pldev)
- continue;
-
- pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
- depca_io_ports[i].device = pldev;
-
- if (platform_device_add(pldev)) {
- depca_io_ports[i].device = NULL;
- pldev->dev.platform_data = NULL;
- platform_device_put(pldev);
- continue;
- }
-
- if (!pldev->dev.driver) {
- /* The driver was not bound to this device, there was
- * no hardware at this address. Unregister it, as the
- * release function will take care of freeing the
- * allocated structure */
-
- depca_io_ports[i].device = NULL;
- pldev->dev.platform_data = NULL;
- platform_device_unregister (pldev);
- }
- }
-}
-
-static enum depca_type __init depca_shmem_probe (ulong *mem_start)
-{
- u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
- enum depca_type adapter = unknown;
- int i;
-
- for (i = 0; mem_base[i]; i++) {
- *mem_start = mem ? mem : mem_base[i];
- adapter = DepcaSignature (adapter_name, *mem_start);
- if (adapter != unknown)
- break;
- }
-
- return adapter;
-}
-
-static int depca_isa_probe(struct platform_device *device)
-{
- struct net_device *dev;
- struct depca_private *lp;
- u_long ioaddr, mem_start = 0;
- enum depca_type adapter = unknown;
- int status = 0;
-
- ioaddr = (u_long) device->dev.platform_data;
-
- if ((status = depca_common_init (ioaddr, &dev)))
- goto out;
-
- adapter = depca_shmem_probe (&mem_start);
-
- if (adapter == unknown) {
- status = -ENODEV;
- goto out_free;
- }
-
- dev->base_addr = ioaddr;
- dev->irq = irq; /* Use whatever value the user gave
- * us, and 0 if he didn't. */
- lp = netdev_priv(dev);
- lp->depca_bus = DEPCA_BUS_ISA;
- lp->adapter = adapter;
- lp->mem_start = mem_start;
-
- if ((status = depca_hw_init(dev, &device->dev)))
- goto out_free;
-
- return 0;
-
- out_free:
- free_netdev (dev);
- release_region (ioaddr, DEPCA_TOTAL_SIZE);
- out:
- return status;
-}
-
-/*
-** EISA callbacks from sysfs.
-*/
-
-#ifdef CONFIG_EISA
-static int __init depca_eisa_probe (struct device *device)
-{
- enum depca_type adapter = unknown;
- struct eisa_device *edev;
- struct net_device *dev;
- struct depca_private *lp;
- u_long ioaddr, mem_start;
- int status = 0;
-
- edev = to_eisa_device (device);
- ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
-
- if ((status = depca_common_init (ioaddr, &dev)))
- goto out;
-
- /* It would have been nice to get card configuration from the
- * card. Unfortunately, this register is write-only (shares
- * it's address with the ethernet prom)... As we don't parse
- * the EISA configuration structures (yet... :-), just rely on
- * the ISA probing to sort it out... */
-
- adapter = depca_shmem_probe (&mem_start);
- if (adapter == unknown) {
- status = -ENODEV;
- goto out_free;
- }
-
- dev->base_addr = ioaddr;
- dev->irq = irq;
- lp = netdev_priv(dev);
- lp->depca_bus = DEPCA_BUS_EISA;
- lp->adapter = edev->id.driver_data;
- lp->mem_start = mem_start;
-
- if ((status = depca_hw_init(dev, device)))
- goto out_free;
-
- return 0;
-
- out_free:
- free_netdev (dev);
- release_region (ioaddr, DEPCA_TOTAL_SIZE);
- out:
- return status;
-}
-#endif
-
-static int depca_device_remove(struct device *device)
-{
- struct net_device *dev;
- struct depca_private *lp;
- int bus;
-
- dev = dev_get_drvdata(device);
- lp = netdev_priv(dev);
-
- unregister_netdev (dev);
- iounmap (lp->sh_mem);
- release_mem_region (lp->mem_start, lp->mem_len);
- release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
- bus = lp->depca_bus;
- free_netdev (dev);
-
- return 0;
-}
-
-/*
-** Look for a particular board name in the on-board Remote Diagnostics
-** and Boot (readb) ROM. This will also give us a clue to the network RAM
-** base address.
-*/
-static int __init DepcaSignature(char *name, u_long base_addr)
-{
- u_int i, j, k;
- void __iomem *ptr;
- char tmpstr[16];
- u_long prom_addr = base_addr + 0xc000;
- u_long mem_addr = base_addr + 0x8000; /* 32KB */
-
- /* Can't reserve the prom region, it is already marked as
- * used, at least on x86. Instead, reserve a memory region a
- * board would certainly use. If it works, go ahead. If not,
- * run like hell... */
-
- if (!request_mem_region (mem_addr, 16, depca_string))
- return unknown;
-
- /* Copy the first 16 bytes of ROM */
-
- ptr = ioremap(prom_addr, 16);
- if (ptr == NULL) {
- printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
- return unknown;
- }
- for (i = 0; i < 16; i++) {
- tmpstr[i] = readb(ptr + i);
- }
- iounmap(ptr);
-
- release_mem_region (mem_addr, 16);
-
- /* Check if PROM contains a valid string */
- for (i = 0; *depca_signature[i] != '\0'; i++) {
- for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
- if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
- k++;
- } else { /* lost signature; begin search again */
- k = 0;
- }
- }
- if (k == strlen(depca_signature[i]))
- break;
- }
-
- /* Check if name string is valid, provided there's no PROM */
- if (name && *name && (i == unknown)) {
- for (i = 0; *depca_signature[i] != '\0'; i++) {
- if (strcmp(name, depca_signature[i]) == 0)
- break;
- }
- }
-
- return i;
-}
-
-/*
-** Look for a special sequence in the Ethernet station address PROM that
-** is common across all DEPCA products. Note that the original DEPCA needs
-** its ROM address counter to be initialized and enabled. Only enable
-** if the first address octet is a 0x08 - this minimises the chances of
-** messing around with some other hardware, but it assumes that this DEPCA
-** card initialized itself correctly.
-**
-** Search the Ethernet address ROM for the signature. Since the ROM address
-** counter can start at an arbitrary point, the search must include the entire
-** probe sequence length plus the (length_of_the_signature - 1).
-** Stop the search IMMEDIATELY after the signature is found so that the
-** PROM address counter is correctly positioned at the start of the
-** ethernet address for later read out.
-*/
-static int __init DevicePresent(u_long ioaddr)
-{
- union {
- struct {
- u32 a;
- u32 b;
- } llsig;
- char Sig[sizeof(u32) << 1];
- }
- dev;
- short sigLength = 0;
- s8 data;
- s16 nicsr;
- int i, j, status = 0;
-
- data = inb(DEPCA_PROM); /* clear counter on DEPCA */
- data = inb(DEPCA_PROM); /* read data */
-
- if (data == 0x08) { /* Enable counter on DEPCA */
- nicsr = inb(DEPCA_NICSR);
- nicsr |= AAC;
- outb(nicsr, DEPCA_NICSR);
- }
-
- dev.llsig.a = ETH_PROM_SIG;
- dev.llsig.b = ETH_PROM_SIG;
- sigLength = sizeof(u32) << 1;
-
- for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
- data = inb(DEPCA_PROM);
- if (dev.Sig[j] == data) { /* track signature */
- j++;
- } else { /* lost signature; begin search again */
- if (data == dev.Sig[0]) { /* rare case.... */
- j = 1;
- } else {
- j = 0;
- }
- }
- }
-
- if (j != sigLength) {
- status = -ENODEV; /* search failed */
- }
-
- return status;
-}
-
-/*
-** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
-** reason: access the upper half of the PROM with x=0; access the lower half
-** with x=1.
-*/
-static int __init get_hw_addr(struct net_device *dev)
-{
- u_long ioaddr = dev->base_addr;
- struct depca_private *lp = netdev_priv(dev);
- int i, k, tmp, status = 0;
- u_short j, x, chksum;
-
- x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
-
- for (i = 0, k = 0, j = 0; j < 3; j++) {
- k <<= 1;
- if (k > 0xffff)
- k -= 0xffff;
-
- k += (u_char) (tmp = inb(DEPCA_PROM + x));
- dev->dev_addr[i++] = (u_char) tmp;
- k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
- dev->dev_addr[i++] = (u_char) tmp;
-
- if (k > 0xffff)
- k -= 0xffff;
- }
- if (k == 0xffff)
- k = 0;
-
- chksum = (u_char) inb(DEPCA_PROM + x);
- chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
- if (k != chksum)
- status = -1;
-
- return status;
-}
-
-/*
-** Load a packet into the shared memory
-*/
-static int load_packet(struct net_device *dev, struct sk_buff *skb)
-{
- struct depca_private *lp = netdev_priv(dev);
- int i, entry, end, len, status = NETDEV_TX_OK;
-
- entry = lp->tx_new; /* Ring around buffer number. */
- end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
- if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
- /*
- ** Caution: the write order is important here... don't set up the
- ** ownership rights until all the other information is in place.
- */
- if (end < entry) { /* wrapped buffer */
- len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
- memcpy_toio(lp->tx_buff[entry], skb->data, len);
- memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
- } else { /* linear buffer */
- memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
- }
-
- /* set up the buffer descriptors */
- len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
- for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
- /* clean out flags */
- writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
- writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
- writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
- len -= TX_BUFF_SZ;
- }
- /* clean out flags */
- writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
- writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
- writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
-
- /* start of packet */
- writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
- /* end of packet */
- writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
-
- for (i = end; i != entry; --i) {
- /* ownership of packet */
- writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
- if (i == 0)
- i = lp->txRingMask + 1;
- }
- writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
-
- lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
- } else {
- status = NETDEV_TX_LOCKED;
- }
-
- return status;
-}
-
-static void depca_dbg_open(struct net_device *dev)
-{
- struct depca_private *lp = netdev_priv(dev);
- u_long ioaddr = dev->base_addr;
- struct depca_init *p = &lp->init_block;
- int i;
-
- if (depca_debug > 1) {
- /* Do not copy the shadow init block into shared memory */
- /* Debugging should not affect normal operation! */
- /* The shadow init block will get copied across during InitRestartDepca */
- printk("%s: depca open with irq %d\n", dev->name, dev->irq);
- printk("Descriptor head addresses (CPU):\n");
- printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
- printk("Descriptor addresses (CPU):\nRX: ");
- for (i = 0; i < lp->rxRingMask; i++) {
- if (i < 3) {
- printk("%p ", &lp->rx_ring[i].base);
- }
- }
- printk("...%p\n", &lp->rx_ring[i].base);
- printk("TX: ");
- for (i = 0; i < lp->txRingMask; i++) {
- if (i < 3) {
- printk("%p ", &lp->tx_ring[i].base);
- }
- }
- printk("...%p\n", &lp->tx_ring[i].base);
- printk("\nDescriptor buffers (Device):\nRX: ");
- for (i = 0; i < lp->rxRingMask; i++) {
- if (i < 3) {
- printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
- }
- }
- printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
- printk("TX: ");
- for (i = 0; i < lp->txRingMask; i++) {
- if (i < 3) {
- printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
- }
- }
- printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
- printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
- printk(" mode: 0x%4.4x\n", p->mode);
- printk(" physical address: %pM\n", p->phys_addr);
- printk(" multicast hash table: ");
- for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
- printk("%2.2x:", p->mcast_table[i]);
- }
- printk("%2.2x\n", p->mcast_table[i]);
- printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
- printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
- printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
- printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
- printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
- outw(CSR2, DEPCA_ADDR);
- printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
- outw(CSR1, DEPCA_ADDR);
- printk("%4.4x\n", inw(DEPCA_DATA));
- outw(CSR3, DEPCA_ADDR);
- printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
- }
-}
-
-/*
-** Perform IOCTL call functions here. Some are privileged operations and the
-** effective uid is checked in those cases.
-** All multicast IOCTLs will not work here and are for testing purposes only.
-*/
-static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
- struct depca_private *lp = netdev_priv(dev);
- struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
- int i, status = 0;
- u_long ioaddr = dev->base_addr;
- union {
- u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
- u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
- u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
- } tmp;
- unsigned long flags;
- void *buf;
-
- switch (ioc->cmd) {
- case DEPCA_GET_HWADDR: /* Get the hardware address */
- for (i = 0; i < ETH_ALEN; i++) {
- tmp.addr[i] = dev->dev_addr[i];
- }
- ioc->len = ETH_ALEN;
- if (copy_to_user(ioc->data, tmp.addr, ioc->len))
- return -EFAULT;
- break;
-
- case DEPCA_SET_HWADDR: /* Set the hardware address */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
- return -EFAULT;
- for (i = 0; i < ETH_ALEN; i++) {
- dev->dev_addr[i] = tmp.addr[i];
- }
- netif_stop_queue(dev);
- while (lp->tx_old != lp->tx_new)
- cpu_relax(); /* Wait for the ring to empty */
-
- STOP_DEPCA; /* Temporarily stop the depca. */
- depca_init_ring(dev); /* Initialize the descriptor rings */
- LoadCSRs(dev); /* Reload CSR3 */
- InitRestartDepca(dev); /* Resume normal operation. */
- netif_start_queue(dev); /* Unlock the TX ring */
- break;
-
- case DEPCA_SET_PROM: /* Set Promiscuous Mode */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- netif_stop_queue(dev);
- while (lp->tx_old != lp->tx_new)
- cpu_relax(); /* Wait for the ring to empty */
-
- STOP_DEPCA; /* Temporarily stop the depca. */
- depca_init_ring(dev); /* Initialize the descriptor rings */
- lp->init_block.mode |= PROM; /* Set promiscuous mode */
-
- LoadCSRs(dev); /* Reload CSR3 */
- InitRestartDepca(dev); /* Resume normal operation. */
- netif_start_queue(dev); /* Unlock the TX ring */
- break;
-
- case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- netif_stop_queue(dev);
- while (lp->tx_old != lp->tx_new)
- cpu_relax(); /* Wait for the ring to empty */
-
- STOP_DEPCA; /* Temporarily stop the depca. */
- depca_init_ring(dev); /* Initialize the descriptor rings */
- lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
-
- LoadCSRs(dev); /* Reload CSR3 */
- InitRestartDepca(dev); /* Resume normal operation. */
- netif_start_queue(dev); /* Unlock the TX ring */
- break;
-
- case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
- if(!capable(CAP_NET_ADMIN))
- return -EPERM;
- printk("%s: Boo!\n", dev->name);
- break;
-
- case DEPCA_GET_MCA: /* Get the multicast address table */
- ioc->len = (HASH_TABLE_LEN >> 3);
- if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
- return -EFAULT;
- break;
-
- case DEPCA_SET_MCA: /* Set a multicast address */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (ioc->len >= HASH_TABLE_LEN)
- return -EINVAL;
- if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
- return -EFAULT;
- set_multicast_list(dev);
- break;
-
- case DEPCA_CLR_MCA: /* Clear all multicast addresses */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- set_multicast_list(dev);
- break;
-
- case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- set_multicast_list(dev);
- break;
-
- case DEPCA_GET_STATS: /* Get the driver statistics */
- ioc->len = sizeof(lp->pktStats);
- buf = kmalloc(ioc->len, GFP_KERNEL);
- if(!buf)
- return -ENOMEM;
- spin_lock_irqsave(&lp->lock, flags);
- memcpy(buf, &lp->pktStats, ioc->len);
- spin_unlock_irqrestore(&lp->lock, flags);
- if (copy_to_user(ioc->data, buf, ioc->len))
- status = -EFAULT;
- kfree(buf);
- break;
-
- case DEPCA_CLR_STATS: /* Zero out the driver statistics */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- spin_lock_irqsave(&lp->lock, flags);
- memset(&lp->pktStats, 0, sizeof(lp->pktStats));
- spin_unlock_irqrestore(&lp->lock, flags);
- break;
-
- case DEPCA_GET_REG: /* Get the DEPCA Registers */
- i = 0;
- tmp.sval[i++] = inw(DEPCA_NICSR);
- outw(CSR0, DEPCA_ADDR); /* status register */
- tmp.sval[i++] = inw(DEPCA_DATA);
- memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
- ioc->len = i + sizeof(struct depca_init);
- if (copy_to_user(ioc->data, tmp.addr, ioc->len))
- return -EFAULT;
- break;
-
- default:
- return -EOPNOTSUPP;
- }
-
- return status;
-}
-
-static int __init depca_module_init (void)
-{
- int err = 0;
-
-#ifdef CONFIG_EISA
- err = eisa_driver_register(&depca_eisa_driver);
- if (err)
- goto err_eisa;
-#endif
- err = platform_driver_register(&depca_isa_driver);
- if (err)
- goto err_eisa;
-
- depca_platform_probe();
- return 0;
-
-err_eisa:
-#ifdef CONFIG_EISA
- eisa_driver_unregister(&depca_eisa_driver);
-#endif
- return err;
-}
-
-static void __exit depca_module_exit (void)
-{
- int i;
-#ifdef CONFIG_EISA
- eisa_driver_unregister (&depca_eisa_driver);
-#endif
- platform_driver_unregister (&depca_isa_driver);
-
- for (i = 0; depca_io_ports[i].iobase; i++) {
- if (depca_io_ports[i].device) {
- depca_io_ports[i].device->dev.platform_data = NULL;
- platform_device_unregister (depca_io_ports[i].device);
- depca_io_ports[i].device = NULL;
- }
- }
-}
-
-module_init (depca_module_init);
-module_exit (depca_module_exit);
projects / kernel.git / commitdiff