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Diffstat (limited to 'drivers/net/depca.c')
| -rw-r--r-- | drivers/net/depca.c | 2122 |
1 files changed, 2122 insertions, 0 deletions
diff --git a/drivers/net/depca.c b/drivers/net/depca.c new file mode 100644 index 000000000000..c4aa5fe2840e --- /dev/null +++ b/drivers/net/depca.c @@ -0,0 +1,2122 @@ +/* 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. + Verified to work with up to 2 DE212 cards in a system (although not + fully stress-tested). + + Currently known bugs/limitations: + + Note: with the MCA stuff as a module, it trusts the MCA configuration, + not the command line for IRQ and memory address. You can + specify them if you want, but it will throw your values out. + You still have to pass the IO address it was configured as + though. + + ************************************************************************ + TO DO: + ------ + + + 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/config.h> +#include <linux/module.h> +#include <linux/kernel.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/device.h> +#include <linux/bitops.h> + +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/dma.h> + +#ifdef CONFIG_MCA +#include <linux/mca.h> +#endif + +#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 = __devexit_p (depca_device_remove) + } +}; +#endif + +#ifdef CONFIG_MCA +/* +** Adapter ID for the MCA EtherWORKS DE210/212 adapter +*/ +#define DE210_ID 0x628d +#define DE212_ID 0x6def + +static short depca_mca_adapter_ids[] = { + DE210_ID, + DE212_ID, + 0x0000 +}; + +static char *depca_mca_adapter_name[] = { + "DEC EtherWORKS MC Adapter (DE210)", + "DEC EtherWORKS MC Adapter (DE212)", + NULL +}; + +static enum depca_type depca_mca_adapter_type[] = { + de210, + de212, + 0 +}; + +static int depca_mca_probe (struct device *); + +static struct mca_driver depca_mca_driver = { + .id_table = depca_mca_adapter_ids, + .driver = { + .name = depca_string, + .bus = &mca_bus_type, + .probe = depca_mca_probe, + .remove = __devexit_p(depca_device_remove), + }, +}; +#endif + +static int depca_isa_probe (struct device *); + +static struct device_driver depca_isa_driver = { + .name = depca_string, + .bus = &platform_bus_type, + .probe = depca_isa_probe, + .remove = __devexit_p(depca_device_remove), +}; + +/* +** 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_MCA = 1, + DEPCA_BUS_ISA, + 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. */ + struct net_device_stats stats; + 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 int depca_start_xmit(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs); +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 struct net_device_stats *depca_get_stats(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 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 = (struct depca_private *) dev->priv; + mem_start = lp->mem_start; + + if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown) + return -ENXIO; + + printk ("%s: %s at 0x%04lx", + device->bus_id, depca_signature[lp->adapter], ioaddr); + + switch (lp->depca_bus) { +#ifdef CONFIG_MCA + case DEPCA_BUS_MCA: + printk(" (MCA slot %d)", to_mca_device(device)->slot + 1); + break; +#endif + +#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); + if (status != 0) { + printk(" which has an Ethernet PROM CRC error.\n"); + return -ENXIO; + } + for (i = 0; i < ETH_ALEN - 1; i++) { /* get the ethernet address */ + printk("%2.2x:", dev->dev_addr[i]); + } + printk("%2.2x", dev->dev_addr[i]); + + /* 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; + + /* Only EISA/ISA needs start address to be re-computed */ + if (lp->depca_bus != DEPCA_BUS_MCA) + 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], device->bus_id); + 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 = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset); + lp->rx_ring_offset = offset; + + offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC); + lp->tx_ring = (struct depca_tx_desc __iomem *) (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->open = &depca_open; + dev->hard_start_xmit = &depca_start_xmit; + dev->stop = &depca_close; + dev->get_stats = &depca_get_stats; + dev->set_multicast_list = &set_multicast_list; + dev->do_ioctl = &depca_ioctl; + dev->tx_timeout = depca_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + + dev->mem_start = 0; + + device->driver_data = 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 = (struct depca_private *) dev->priv; + 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 = (struct depca_private *) dev->priv; + 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; + netif_wake_queue(dev); + InitRestartDepca(dev); +} + + +/* +** Writes a socket buffer to TX descriptor ring and starts transmission +*/ +static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct depca_private *lp = (struct depca_private *) dev->priv; + u_long ioaddr = dev->base_addr; + int status = 0; + + /* Transmitter timeout, serious problems. */ + if (skb->len < 1) + goto out; + + if (skb->len < ETH_ZLEN) { + skb = skb_padto(skb, ETH_ZLEN); + if (skb == NULL) + 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->trans_start = jiffies; + dev_kfree_skb(skb); + } + if (TX_BUFFS_AVAIL) + netif_start_queue(dev); + } else + status = -1; + + out: + return status; +} + +/* +** The DEPCA interrupt handler. +*/ +static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + 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 = (struct depca_private *) dev->priv; + 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 = (struct depca_private *) dev->priv; + 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. */ + lp->stats.rx_errors++; /* Update the error stats. */ + if (status & R_FRAM) + lp->stats.rx_frame_errors++; + if (status & R_OFLO) + lp->stats.rx_over_errors++; + if (status & R_CRC) + lp->stats.rx_crc_errors++; + if (status & R_BUFF) + lp->stats.rx_fifo_errors++; + } else { + short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4; + struct sk_buff *skb; + + skb = dev_alloc_skb(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); + skb->dev = dev; + 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->last_rx = jiffies; + lp->stats.rx_packets++; + lp->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 (buf[0] & 0x01) { /* Multicast/Broadcast */ + if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) { + lp->pktStats.broadcast++; + } else { + lp->pktStats.multicast++; + } + } else if ((*(s16 *) & buf[0] == *(s16 *) & dev->dev_addr[0]) && (*(s16 *) & buf[2] == *(s16 *) & dev->dev_addr[2]) && (*(s16 *) & buf[4] == *(s16 *) & dev->dev_addr[4])) { + 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); + lp->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) & 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) & 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 = (struct depca_private *) dev->priv; + 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); + lp->stats.tx_errors++; + if (status & TMD3_RTRY) + lp->stats.tx_aborted_errors++; + if (status & TMD3_LCAR) + lp->stats.tx_carrier_errors++; + if (status & TMD3_LCOL) + lp->stats.tx_window_errors++; + if (status & TMD3_UFLO) + lp->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)) { + lp->stats.collisions++; + } else { + lp->stats.tx_packets++; + } + + /* Update all the pointers */ + lp->tx_old = (++lp->tx_old) & lp->txRingMask; + } + + return 0; +} + +static int depca_close(struct net_device *dev) +{ + struct depca_private *lp = (struct depca_private *) dev->priv; + 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 = (struct depca_private *) dev->priv; + 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 */ + + return; +} + +static int InitRestartDepca(struct net_device *dev) +{ + struct depca_private *lp = (struct depca_private *) dev->priv; + 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; +} + +static struct net_device_stats *depca_get_stats(struct net_device *dev) +{ + struct depca_private *lp = (struct depca_private *) dev->priv; + + /* Null body since there is no framing error counter */ + + return &lp->stats; +} + +/* +** Set or clear the multicast filter for this adaptor. +*/ +static void set_multicast_list(struct net_device *dev) +{ + struct depca_private *lp = (struct depca_private *) dev->priv; + u_long ioaddr = dev->base_addr; + + if (dev) { + 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 = (struct depca_private *) dev->priv; + struct dev_mc_list *dmi = dev->mc_list; + char *addrs; + 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 */ + for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */ + addrs = dmi->dmi_addr; + dmi = dmi->next; + if ((*addrs & 0x01) == 1) { /* multicast address? */ + crc = ether_crc(ETH_ALEN, addrs); + 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; + } + } + } + + return; +} + +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; +} + +#ifdef CONFIG_MCA +/* +** Microchannel bus I/O device probe +*/ +static int __init depca_mca_probe(struct device *device) +{ + unsigned char pos[2]; + unsigned char where; + unsigned long iobase, mem_start; + int irq, err; + struct mca_device *mdev = to_mca_device (device); + struct net_device *dev; + struct depca_private *lp; + + /* + ** Search for the adapter. If an address has been given, search + ** specifically for the card at that address. Otherwise find the + ** first card in the system. + */ + + pos[0] = mca_device_read_stored_pos(mdev, 2); + pos[1] = mca_device_read_stored_pos(mdev, 3); + + /* + ** IO of card is handled by bits 1 and 2 of pos0. + ** + ** bit2 bit1 IO + ** 0 0 0x2c00 + ** 0 1 0x2c10 + ** 1 0 0x2c20 + ** 1 1 0x2c30 + */ + where = (pos[0] & 6) >> 1; + iobase = 0x2c00 + (0x10 * where); + + /* + ** Found the adapter we were looking for. Now start setting it up. + ** + ** First work on decoding the IRQ. It's stored in the lower 4 bits + ** of pos1. Bits are as follows (from the ADF file): + ** + ** Bits + ** 3 2 1 0 IRQ + ** -------------------- + ** 0 0 1 0 5 + ** 0 0 0 1 9 + ** 0 1 0 0 10 + ** 1 0 0 0 11 + */ + where = pos[1] & 0x0f; + switch (where) { + case 1: + irq = 9; + break; + case 2: + irq = 5; + break; + case 4: + irq = 10; + break; + case 8: + irq = 11; + break; + default: + printk("%s: mca_probe IRQ error. You should never get here (%d).\n", dev->name, where); + return -EINVAL; + } + + /* + ** Shared memory address of adapter is stored in bits 3-5 of pos0. + ** They are mapped as follows: + ** + ** Bit + ** 5 4 3 Memory Addresses + ** 0 0 0 C0000-CFFFF (64K) + ** 1 0 0 C8000-CFFFF (32K) + ** 0 0 1 D0000-DFFFF (64K) + ** 1 0 1 D8000-DFFFF (32K) + ** 0 1 0 E0000-EFFFF (64K) + ** 1 1 0 E8000-EFFFF (32K) + */ + where = (pos[0] & 0x18) >> 3; + mem_start = 0xc0000 + (where * 0x10000); + if (pos[0] & 0x20) { + mem_start += 0x8000; + } + + /* claim the slot */ + strncpy(mdev->name, depca_mca_adapter_name[mdev->index], + sizeof(mdev->name)); + mca_device_set_claim(mdev, 1); + + /* + ** Get everything allocated and initialized... (almost just + ** like the ISA and EISA probes) + */ + irq = mca_device_transform_irq(mdev, irq); + iobase = mca_device_transform_ioport(mdev, iobase); + + if ((err = depca_common_init (iobase, &dev))) + goto out_unclaim; + + dev->irq = irq; + dev->base_addr = iobase; + lp = dev->priv; + lp->depca_bus = DEPCA_BUS_MCA; + lp->adapter = depca_mca_adapter_type[mdev->index]; + lp->mem_start = mem_start; + + if ((err = depca_hw_init(dev, device))) + goto out_free; + + return 0; + + out_free: + free_netdev (dev); + release_region (iobase, DEPCA_TOTAL_SIZE); + out_unclaim: + mca_device_set_claim(mdev, 0); + + return err; +} +#endif + +/* +** ISA bus I/O device probe +*/ + +static void depca_platform_release (struct device *device) +{ + struct platform_device *pldev; + + /* free device */ + pldev = to_platform_device (device); + kfree (pldev); +} + +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; + + if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL))) + continue; + + memset (pldev, 0, sizeof (*pldev)); + pldev->name = depca_string; + pldev->id = i; + pldev->dev.platform_data = (void *) depca_io_ports[i].iobase; + pldev->dev.release = depca_platform_release; + depca_io_ports[i].device = pldev; + + if (platform_device_register (pldev)) { + kfree (pldev); + depca_io_ports[i].device = NULL; + 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 fuction will take care of freeing the + * allocated structure */ + + depca_io_ports[i].device = 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 __init depca_isa_probe (struct 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->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 = dev->priv; + lp->depca_bus = DEPCA_BUS_ISA; + lp->adapter = adapter; + 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; +} + +/* +** EISA callbacks from sysfs. +*/ + +#ifdef CONFIG_EISA +static int __init depca_eisa_probe (struct device *device) +{ + 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... */ + + depca_shmem_probe (&mem_start); + + dev->base_addr = ioaddr; + dev->irq = irq; + lp = dev->priv; + 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 __devexit depca_device_remove (struct device *device) +{ + struct net_device *dev; + struct depca_private *lp; + int bus; + + dev = device->driver_data; + lp = dev->priv; + + 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 = dev->priv; + 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 = (struct depca_private *) dev->priv; + int i, entry, end, len, status = 0; + + 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 = -1; + } + + return status; +} + +static void depca_dbg_open(struct net_device *dev) +{ + struct depca_private *lp = (struct depca_private *) dev->priv; + 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: "); + for (i = 0; i < ETH_ALEN - 1; i++) { + printk("%2.2x:", p->phys_addr[i]); + } + printk("%2.2x\n", p->phys_addr[i]); + 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)); + } + + return; +} + +/* +** 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 = (struct depca_private *) dev->priv; + 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_MCA + err = mca_register_driver (&depca_mca_driver); +#endif +#ifdef CONFIG_EISA + err |= eisa_driver_register (&depca_eisa_driver); +#endif + err |= driver_register (&depca_isa_driver); + depca_platform_probe (); + + return err; +} + +static void __exit depca_module_exit (void) +{ + int i; +#ifdef CONFIG_MCA + mca_unregister_driver (&depca_mca_driver); +#endif +#ifdef CONFIG_EISA + eisa_driver_unregister (&depca_eisa_driver); +#endif + driver_unregister (&depca_isa_driver); + + for (i = 0; depca_io_ports[i].iobase; i++) { + if (depca_io_ports[i].device) { + platform_device_unregister (depca_io_ports[i].device); + depca_io_ports[i].device = NULL; + } + } +} + +module_init (depca_module_init); +module_exit (depca_module_exit); |