diff options
Diffstat (limited to 'drivers/net/cs89x0.c')
| -rw-r--r-- | drivers/net/cs89x0.c | 1866 |
1 files changed, 1866 insertions, 0 deletions
diff --git a/drivers/net/cs89x0.c b/drivers/net/cs89x0.c new file mode 100644 index 00000000000..5c5f540da26 --- /dev/null +++ b/drivers/net/cs89x0.c @@ -0,0 +1,1866 @@ +/* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 + * driver for linux. + */ + +/* + Written 1996 by Russell Nelson, with reference to skeleton.c + written 1993-1994 by Donald Becker. + + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + The author may be reached at nelson@crynwr.com, Crynwr + Software, 521 Pleasant Valley Rd., Potsdam, NY 13676 + + Changelog: + + Mike Cruse : mcruse@cti-ltd.com + : Changes for Linux 2.0 compatibility. + : Added dev_id parameter in net_interrupt(), + : request_irq() and free_irq(). Just NULL for now. + + Mike Cruse : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros + : in net_open() and net_close() so kerneld would know + : that the module is in use and wouldn't eject the + : driver prematurely. + + Mike Cruse : Rewrote init_module() and cleanup_module using 8390.c + : as an example. Disabled autoprobing in init_module(), + : not a good thing to do to other devices while Linux + : is running from all accounts. + + Russ Nelson : Jul 13 1998. Added RxOnly DMA support. + + Melody Lee : Aug 10 1999. Changes for Linux 2.2.5 compatibility. + : email: ethernet@crystal.cirrus.com + + Alan Cox : Removed 1.2 support, added 2.1 extra counters. + + Andrew Morton : andrewm@uow.edu.au + : Kernel 2.3.48 + : Handle kmalloc() failures + : Other resource allocation fixes + : Add SMP locks + : Integrate Russ Nelson's ALLOW_DMA functionality back in. + : If ALLOW_DMA is true, make DMA runtime selectable + : Folded in changes from Cirrus (Melody Lee + : <klee@crystal.cirrus.com>) + : Don't call netif_wake_queue() in net_send_packet() + : Fixed an out-of-mem bug in dma_rx() + : Updated Documentation/networking/cs89x0.txt + + Andrew Morton : andrewm@uow.edu.au / Kernel 2.3.99-pre1 + : Use skb_reserve to longword align IP header (two places) + : Remove a delay loop from dma_rx() + : Replace '100' with HZ + : Clean up a couple of skb API abuses + : Added 'cs89x0_dma=N' kernel boot option + : Correctly initialise lp->lock in non-module compile + + Andrew Morton : andrewm@uow.edu.au / Kernel 2.3.99-pre4-1 + : MOD_INC/DEC race fix (see + : http://www.uwsg.indiana.edu/hypermail/linux/kernel/0003.3/1532.html) + + Andrew Morton : andrewm@uow.edu.au / Kernel 2.4.0-test7-pre2 + : Enhanced EEPROM support to cover more devices, + : abstracted IRQ mapping to support CONFIG_ARCH_CLPS7500 arch + : (Jason Gunthorpe <jgg@ualberta.ca>) + + Andrew Morton : Kernel 2.4.0-test11-pre4 + : Use dev->name in request_*() (Andrey Panin) + : Fix an error-path memleak in init_module() + : Preserve return value from request_irq() + : Fix type of `media' module parm (Keith Owens) + : Use SET_MODULE_OWNER() + : Tidied up strange request_irq() abuse in net_open(). + + Andrew Morton : Kernel 2.4.3-pre1 + : Request correct number of pages for DMA (Hugh Dickens) + : Select PP_ChipID _after_ unregister_netdev in cleanup_module() + : because unregister_netdev() calls get_stats. + : Make `version[]' __initdata + : Uninlined the read/write reg/word functions. + + Oskar Schirmer : oskar@scara.com + : HiCO.SH4 (superh) support added (irq#1, cs89x0_media=) + + Deepak Saxena : dsaxena@plexity.net + : Intel IXDP2x01 (XScale ixp2x00 NPU) platform support + +*/ + +/* Always include 'config.h' first in case the user wants to turn on + or override something. */ +#include <linux/config.h> +#include <linux/module.h> + +/* + * Set this to zero to disable DMA code + * + * Note that even if DMA is turned off we still support the 'dma' and 'use_dma' + * module options so we don't break any startup scripts. + */ +#ifndef CONFIG_ARCH_IXDP2X01 +#define ALLOW_DMA 0 +#else +#define ALLOW_DMA 1 +#endif + +/* + * Set this to zero to remove all the debug statements via + * dead code elimination + */ +#define DEBUGGING 1 + +/* + Sources: + + Crynwr packet driver epktisa. + + Crystal Semiconductor data sheets. + +*/ + +#include <linux/errno.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/skbuff.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <linux/delay.h> + +#include <asm/system.h> +#include <asm/io.h> +#if ALLOW_DMA +#include <asm/dma.h> +#endif + +#include "cs89x0.h" + +static char version[] __initdata = +"cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>\n"; + +#define DRV_NAME "cs89x0" + +/* First, a few definitions that the brave might change. + A zero-terminated list of I/O addresses to be probed. Some special flags.. + Addr & 1 = Read back the address port, look for signature and reset + the page window before probing + Addr & 3 = Reset the page window and probe + The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space, + but it is possible that a Cirrus board could be plugged into the ISA + slots. */ +/* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps + them to system IRQ numbers. This mapping is card specific and is set to + the configuration of the Cirrus Eval board for this chip. */ +#ifdef CONFIG_ARCH_CLPS7500 +static unsigned int netcard_portlist[] __initdata = + { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0}; +static unsigned int cs8900_irq_map[] = {12,0,0,0}; +#elif defined(CONFIG_SH_HICOSH4) +static unsigned int netcard_portlist[] __initdata = + { 0x0300, 0}; +static unsigned int cs8900_irq_map[] = {1,0,0,0}; +#elif defined(CONFIG_ARCH_IXDP2X01) +#include <asm/irq.h> +static unsigned int netcard_portlist[] __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0}; +static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0}; +#else +static unsigned int netcard_portlist[] __initdata = + { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0}; +static unsigned int cs8900_irq_map[] = {10,11,12,5}; +#endif + +#if DEBUGGING +static unsigned int net_debug = DEBUGGING; +#else +#define net_debug 0 /* gcc will remove all the debug code for us */ +#endif + +/* The number of low I/O ports used by the ethercard. */ +#define NETCARD_IO_EXTENT 16 + +/* we allow the user to override various values normally set in the EEPROM */ +#define FORCE_RJ45 0x0001 /* pick one of these three */ +#define FORCE_AUI 0x0002 +#define FORCE_BNC 0x0004 + +#define FORCE_AUTO 0x0010 /* pick one of these three */ +#define FORCE_HALF 0x0020 +#define FORCE_FULL 0x0030 + +/* Information that need to be kept for each board. */ +struct net_local { + struct net_device_stats stats; + int chip_type; /* one of: CS8900, CS8920, CS8920M */ + char chip_revision; /* revision letter of the chip ('A'...) */ + int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */ + int auto_neg_cnf; /* auto-negotiation word from EEPROM */ + int adapter_cnf; /* adapter configuration from EEPROM */ + int isa_config; /* ISA configuration from EEPROM */ + int irq_map; /* IRQ map from EEPROM */ + int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */ + int curr_rx_cfg; /* a copy of PP_RxCFG */ + int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */ + int send_underrun; /* keep track of how many underruns in a row we get */ + int force; /* force various values; see FORCE* above. */ + spinlock_t lock; +#if ALLOW_DMA + int use_dma; /* Flag: we're using dma */ + int dma; /* DMA channel */ + int dmasize; /* 16 or 64 */ + unsigned char *dma_buff; /* points to the beginning of the buffer */ + unsigned char *end_dma_buff; /* points to the end of the buffer */ + unsigned char *rx_dma_ptr; /* points to the next packet */ +#endif +}; + +/* Index to functions, as function prototypes. */ + +static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular); +static int net_open(struct net_device *dev); +static int net_send_packet(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs); +static void set_multicast_list(struct net_device *dev); +static void net_timeout(struct net_device *dev); +static void net_rx(struct net_device *dev); +static int net_close(struct net_device *dev); +static struct net_device_stats *net_get_stats(struct net_device *dev); +static void reset_chip(struct net_device *dev); +static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer); +static int get_eeprom_cksum(int off, int len, int *buffer); +static int set_mac_address(struct net_device *dev, void *addr); +static void count_rx_errors(int status, struct net_local *lp); +#if ALLOW_DMA +static void get_dma_channel(struct net_device *dev); +static void release_dma_buff(struct net_local *lp); +#endif + +/* Example routines you must write ;->. */ +#define tx_done(dev) 1 + +/* + * Permit 'cs89x0_dma=N' in the kernel boot environment + */ +#if !defined(MODULE) && (ALLOW_DMA != 0) +static int g_cs89x0_dma; + +static int __init dma_fn(char *str) +{ + g_cs89x0_dma = simple_strtol(str,NULL,0); + return 1; +} + +__setup("cs89x0_dma=", dma_fn); +#endif /* !defined(MODULE) && (ALLOW_DMA != 0) */ + +#ifndef MODULE +static int g_cs89x0_media__force; + +static int __init media_fn(char *str) +{ + if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45; + else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI; + else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC; + return 1; +} + +__setup("cs89x0_media=", media_fn); + + +/* Check for a network adaptor of this type, and return '0' iff one exists. + If dev->base_addr == 0, probe all likely locations. + If dev->base_addr == 1, always return failure. + If dev->base_addr == 2, allocate space for the device and return success + (detachable devices only). + Return 0 on success. + */ + +struct net_device * __init cs89x0_probe(int unit) +{ + struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); + unsigned *port; + int err = 0; + int irq; + int io; + + if (!dev) + return ERR_PTR(-ENODEV); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + io = dev->base_addr; + irq = dev->irq; + + if (net_debug) + printk("cs89x0:cs89x0_probe(0x%x)\n", io); + + if (io > 0x1ff) { /* Check a single specified location. */ + err = cs89x0_probe1(dev, io, 0); + } else if (io != 0) { /* Don't probe at all. */ + err = -ENXIO; + } else { + for (port = netcard_portlist; *port; port++) { + if (cs89x0_probe1(dev, *port, 0) == 0) + break; + dev->irq = irq; + } + if (!*port) + err = -ENODEV; + } + if (err) + goto out; + err = register_netdev(dev); + if (err) + goto out1; + return dev; +out1: + outw(PP_ChipID, dev->base_addr + ADD_PORT); + release_region(dev->base_addr, NETCARD_IO_EXTENT); +out: + free_netdev(dev); + printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n"); + return ERR_PTR(err); +} +#endif + +static int +readreg(struct net_device *dev, int portno) +{ + outw(portno, dev->base_addr + ADD_PORT); + return inw(dev->base_addr + DATA_PORT); +} + +static void +writereg(struct net_device *dev, int portno, int value) +{ + outw(portno, dev->base_addr + ADD_PORT); + outw(value, dev->base_addr + DATA_PORT); +} + +static int +readword(struct net_device *dev, int portno) +{ + return inw(dev->base_addr + portno); +} + +static void +writeword(struct net_device *dev, int portno, int value) +{ + outw(value, dev->base_addr + portno); +} + +static int __init +wait_eeprom_ready(struct net_device *dev) +{ + int timeout = jiffies; + /* check to see if the EEPROM is ready, a timeout is used - + just in case EEPROM is ready when SI_BUSY in the + PP_SelfST is clear */ + while(readreg(dev, PP_SelfST) & SI_BUSY) + if (jiffies - timeout >= 40) + return -1; + return 0; +} + +static int __init +get_eeprom_data(struct net_device *dev, int off, int len, int *buffer) +{ + int i; + + if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len); + for (i = 0; i < len; i++) { + if (wait_eeprom_ready(dev) < 0) return -1; + /* Now send the EEPROM read command and EEPROM location to read */ + writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD); + if (wait_eeprom_ready(dev) < 0) return -1; + buffer[i] = readreg(dev, PP_EEData); + if (net_debug > 3) printk("%04x ", buffer[i]); + } + if (net_debug > 3) printk("\n"); + return 0; +} + +static int __init +get_eeprom_cksum(int off, int len, int *buffer) +{ + int i, cksum; + + cksum = 0; + for (i = 0; i < len; i++) + cksum += buffer[i]; + cksum &= 0xffff; + if (cksum == 0) + return 0; + return -1; +} + +/* This is the real probe routine. Linux has a history of friendly device + probes on the ISA bus. A good device probes avoids doing writes, and + verifies that the correct device exists and functions. + Return 0 on success. + */ + +static int __init +cs89x0_probe1(struct net_device *dev, int ioaddr, int modular) +{ + struct net_local *lp = netdev_priv(dev); + static unsigned version_printed; + int i; + unsigned rev_type = 0; + int eeprom_buff[CHKSUM_LEN]; + int retval; + + SET_MODULE_OWNER(dev); + /* Initialize the device structure. */ + if (!modular) { + memset(lp, 0, sizeof(*lp)); + spin_lock_init(&lp->lock); +#ifndef MODULE +#if ALLOW_DMA + if (g_cs89x0_dma) { + lp->use_dma = 1; + lp->dma = g_cs89x0_dma; + lp->dmasize = 16; /* Could make this an option... */ + } +#endif + lp->force = g_cs89x0_media__force; +#endif + } + + /* Grab the region so we can find another board if autoIRQ fails. */ + /* WTF is going on here? */ + if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) { + printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n", + DRV_NAME, ioaddr, NETCARD_IO_EXTENT); + retval = -EBUSY; + goto out1; + } + +#ifdef CONFIG_SH_HICOSH4 + /* truely reset the chip */ + outw(0x0114, ioaddr + ADD_PORT); + outw(0x0040, ioaddr + DATA_PORT); +#endif + + /* if they give us an odd I/O address, then do ONE write to + the address port, to get it back to address zero, where we + expect to find the EISA signature word. An IO with a base of 0x3 + will skip the test for the ADD_PORT. */ + if (ioaddr & 1) { + if (net_debug > 1) + printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr); + if ((ioaddr & 2) != 2) + if ((inw((ioaddr & ~3)+ ADD_PORT) & ADD_MASK) != ADD_SIG) { + printk(KERN_ERR "%s: bad signature 0x%x\n", + dev->name, inw((ioaddr & ~3)+ ADD_PORT)); + retval = -ENODEV; + goto out2; + } + } +printk("PP_addr=0x%x\n", inw(ioaddr + ADD_PORT)); + + ioaddr &= ~3; + outw(PP_ChipID, ioaddr + ADD_PORT); + + if (inw(ioaddr + DATA_PORT) != CHIP_EISA_ID_SIG) { + printk(KERN_ERR "%s: incorrect signature 0x%x\n", + dev->name, inw(ioaddr + DATA_PORT)); + retval = -ENODEV; + goto out2; + } + + /* Fill in the 'dev' fields. */ + dev->base_addr = ioaddr; + + /* get the chip type */ + rev_type = readreg(dev, PRODUCT_ID_ADD); + lp->chip_type = rev_type &~ REVISON_BITS; + lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A'; + + /* Check the chip type and revision in order to set the correct send command + CS8920 revision C and CS8900 revision F can use the faster send. */ + lp->send_cmd = TX_AFTER_381; + if (lp->chip_type == CS8900 && lp->chip_revision >= 'F') + lp->send_cmd = TX_NOW; + if (lp->chip_type != CS8900 && lp->chip_revision >= 'C') + lp->send_cmd = TX_NOW; + + if (net_debug && version_printed++ == 0) + printk(version); + + printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ", + dev->name, + lp->chip_type==CS8900?'0':'2', + lp->chip_type==CS8920M?"M":"", + lp->chip_revision, + dev->base_addr); + + reset_chip(dev); + + /* Here we read the current configuration of the chip. If there + is no Extended EEPROM then the idea is to not disturb the chip + configuration, it should have been correctly setup by automatic + EEPROM read on reset. So, if the chip says it read the EEPROM + the driver will always do *something* instead of complain that + adapter_cnf is 0. */ + +#ifdef CONFIG_SH_HICOSH4 + if (1) { + /* For the HiCO.SH4 board, things are different: we don't + have EEPROM, but there is some data in flash, so we go + get it there directly (MAC). */ + __u16 *confd; + short cnt; + if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff) + == 0x006c3000) { + confd = (__u16*) 0xa0013fc0; + } else { + confd = (__u16*) 0xa001ffc0; + } + cnt = (*confd++ & 0x00ff) >> 1; + while (--cnt > 0) { + __u16 j = *confd++; + + switch (j & 0x0fff) { + case PP_IA: + for (i = 0; i < ETH_ALEN/2; i++) { + dev->dev_addr[i*2] = confd[i] & 0xFF; + dev->dev_addr[i*2+1] = confd[i] >> 8; + } + break; + } + j = (j >> 12) + 1; + confd += j; + cnt -= j; + } + } else +#endif + + if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) == + (EEPROM_OK|EEPROM_PRESENT)) { + /* Load the MAC. */ + for (i=0; i < ETH_ALEN/2; i++) { + unsigned int Addr; + Addr = readreg(dev, PP_IA+i*2); + dev->dev_addr[i*2] = Addr & 0xFF; + dev->dev_addr[i*2+1] = Addr >> 8; + } + + /* Load the Adapter Configuration. + Note: Barring any more specific information from some + other source (ie EEPROM+Schematics), we would not know + how to operate a 10Base2 interface on the AUI port. + However, since we do read the status of HCB1 and use + settings that always result in calls to control_dc_dc(dev,0) + a BNC interface should work if the enable pin + (dc/dc converter) is on HCB1. It will be called AUI + however. */ + + lp->adapter_cnf = 0; + i = readreg(dev, PP_LineCTL); + /* Preserve the setting of the HCB1 pin. */ + if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL)) + lp->adapter_cnf |= A_CNF_DC_DC_POLARITY; + /* Save the sqelch bit */ + if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH) + lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH; + /* Check if the card is in 10Base-t only mode */ + if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0) + lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T; + /* Check if the card is in AUI only mode */ + if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY) + lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI; + /* Check if the card is in Auto mode. */ + if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET) + lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T | + A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO; + + if (net_debug > 1) + printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n", + dev->name, i, lp->adapter_cnf); + + /* IRQ. Other chips already probe, see below. */ + if (lp->chip_type == CS8900) + lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK; + + printk( "[Cirrus EEPROM] "); + } + + printk("\n"); + + /* First check to see if an EEPROM is attached. */ +#ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */ + if (1) { + printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n"); + } else +#endif + if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0) + printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n"); + else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) { + printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n"); + } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) { + /* Check if the chip was able to read its own configuration starting + at 0 in the EEPROM*/ + if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) != + (EEPROM_OK|EEPROM_PRESENT)) + printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n"); + + } else { + /* This reads an extended EEPROM that is not documented + in the CS8900 datasheet. */ + + /* get transmission control word but keep the autonegotiation bits */ + if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2]; + /* Store adapter configuration */ + if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2]; + /* Store ISA configuration */ + lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2]; + dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8; + + /* eeprom_buff has 32-bit ints, so we can't just memcpy it */ + /* store the initial memory base address */ + for (i = 0; i < ETH_ALEN/2; i++) { + dev->dev_addr[i*2] = eeprom_buff[i]; + dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8; + } + if (net_debug > 1) + printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n", + dev->name, lp->adapter_cnf); + } + + /* allow them to force multiple transceivers. If they force multiple, autosense */ + { + int count = 0; + if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; } + if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; } + if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; } + if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; } + else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; } + else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; } + else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; } + } + + if (net_debug > 1) + printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n", + dev->name, lp->force, lp->adapter_cnf); + + /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */ + + /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */ + + /* FIXME: we don't set the Ethernet address on the command line. Use + ifconfig IFACE hw ether AABBCCDDEEFF */ + + printk(KERN_INFO "cs89x0 media %s%s%s", + (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"", + (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"", + (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":""); + + lp->irq_map = 0xffff; + + /* If this is a CS8900 then no pnp soft */ + if (lp->chip_type != CS8900 && + /* Check if the ISA IRQ has been set */ + (i = readreg(dev, PP_CS8920_ISAINT) & 0xff, + (i != 0 && i < CS8920_NO_INTS))) { + if (!dev->irq) + dev->irq = i; + } else { + i = lp->isa_config & INT_NO_MASK; + if (lp->chip_type == CS8900) { +#ifdef CONFIG_ARCH_IXDP2X01 + i = cs8900_irq_map[0]; +#else + /* Translate the IRQ using the IRQ mapping table. */ + if (i >= sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0])) + printk("\ncs89x0: invalid ISA interrupt number %d\n", i); + else + i = cs8900_irq_map[i]; + + lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */ + } else { + int irq_map_buff[IRQ_MAP_LEN/2]; + + if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA, + IRQ_MAP_LEN/2, + irq_map_buff) >= 0) { + if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT) + lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8); + } +#endif + } + if (!dev->irq) + dev->irq = i; + } + + printk(" IRQ %d", dev->irq); + +#if ALLOW_DMA + if (lp->use_dma) { + get_dma_channel(dev); + printk(", DMA %d", dev->dma); + } + else +#endif + { + printk(", programmed I/O"); + } + + /* print the ethernet address. */ + printk(", MAC"); + for (i = 0; i < ETH_ALEN; i++) + { + printk("%c%02x", i ? ':' : ' ', dev->dev_addr[i]); + } + + dev->open = net_open; + dev->stop = net_close; + dev->tx_timeout = net_timeout; + dev->watchdog_timeo = HZ; + dev->hard_start_xmit = net_send_packet; + dev->get_stats = net_get_stats; + dev->set_multicast_list = set_multicast_list; + dev->set_mac_address = set_mac_address; + + printk("\n"); + if (net_debug) + printk("cs89x0_probe1() successful\n"); + return 0; +out2: + release_region(ioaddr & ~3, NETCARD_IO_EXTENT); +out1: + return retval; +} + + +/********************************* + * This page contains DMA routines +**********************************/ + +#if ALLOW_DMA + +#define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17) + +static void +get_dma_channel(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + if (lp->dma) { + dev->dma = lp->dma; + lp->isa_config |= ISA_RxDMA; + } else { + if ((lp->isa_config & ANY_ISA_DMA) == 0) + return; + dev->dma = lp->isa_config & DMA_NO_MASK; + if (lp->chip_type == CS8900) + dev->dma += 5; + if (dev->dma < 5 || dev->dma > 7) { + lp->isa_config &= ~ANY_ISA_DMA; + return; + } + } + return; +} + +static void +write_dma(struct net_device *dev, int chip_type, int dma) +{ + struct net_local *lp = netdev_priv(dev); + if ((lp->isa_config & ANY_ISA_DMA) == 0) + return; + if (chip_type == CS8900) { + writereg(dev, PP_CS8900_ISADMA, dma-5); + } else { + writereg(dev, PP_CS8920_ISADMA, dma); + } +} + +static void +set_dma_cfg(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + if (lp->use_dma) { + if ((lp->isa_config & ANY_ISA_DMA) == 0) { + if (net_debug > 3) + printk("set_dma_cfg(): no DMA\n"); + return; + } + if (lp->isa_config & ISA_RxDMA) { + lp->curr_rx_cfg |= RX_DMA_ONLY; + if (net_debug > 3) + printk("set_dma_cfg(): RX_DMA_ONLY\n"); + } else { + lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */ + if (net_debug > 3) + printk("set_dma_cfg(): AUTO_RX_DMA\n"); + } + } +} + +static int +dma_bufcfg(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + if (lp->use_dma) + return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0; + else + return 0; +} + +static int +dma_busctl(struct net_device *dev) +{ + int retval = 0; + struct net_local *lp = netdev_priv(dev); + if (lp->use_dma) { + if (lp->isa_config & ANY_ISA_DMA) + retval |= RESET_RX_DMA; /* Reset the DMA pointer */ + if (lp->isa_config & DMA_BURST) + retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */ + if (lp->dmasize == 64) + retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */ + retval |= MEMORY_ON; /* we need memory enabled to use DMA. */ + } + return retval; +} + +static void +dma_rx(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + struct sk_buff *skb; + int status, length; + unsigned char *bp = lp->rx_dma_ptr; + + status = bp[0] + (bp[1]<<8); + length = bp[2] + (bp[3]<<8); + bp += 4; + if (net_debug > 5) { + printk( "%s: receiving DMA packet at %lx, status %x, length %x\n", + dev->name, (unsigned long)bp, status, length); + } + if ((status & RX_OK) == 0) { + count_rx_errors(status, lp); + goto skip_this_frame; + } + + /* Malloc up new buffer. */ + skb = dev_alloc_skb(length + 2); + if (skb == NULL) { + if (net_debug) /* I don't think we want to do this to a stressed system */ + printk("%s: Memory squeeze, dropping packet.\n", dev->name); + lp->stats.rx_dropped++; + + /* AKPM: advance bp to the next frame */ +skip_this_frame: + bp += (length + 3) & ~3; + if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024; + lp->rx_dma_ptr = bp; + return; + } + skb_reserve(skb, 2); /* longword align L3 header */ + skb->dev = dev; + + if (bp + length > lp->end_dma_buff) { + int semi_cnt = lp->end_dma_buff - bp; + memcpy(skb_put(skb,semi_cnt), bp, semi_cnt); + memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff, + length - semi_cnt); + } else { + memcpy(skb_put(skb,length), bp, length); + } + bp += (length + 3) & ~3; + if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024; + lp->rx_dma_ptr = bp; + + if (net_debug > 3) { + printk( "%s: received %d byte DMA packet of type %x\n", + dev->name, length, + (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]); + } + skb->protocol=eth_type_trans(skb,dev); + netif_rx(skb); + dev->last_rx = jiffies; + lp->stats.rx_packets++; + lp->stats.rx_bytes += length; +} + +#endif /* ALLOW_DMA */ + +void __init reset_chip(struct net_device *dev) +{ +#ifndef CONFIG_ARCH_IXDP2X01 + struct net_local *lp = netdev_priv(dev); + int ioaddr = dev->base_addr; +#endif + int reset_start_time; + + writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET); + + /* wait 30 ms */ + msleep(30); + +#ifndef CONFIG_ARCH_IXDP2X01 + if (lp->chip_type != CS8900) { + /* Hardware problem requires PNP registers to be reconfigured after a reset */ + outw(PP_CS8920_ISAINT, ioaddr + ADD_PORT); + outb(dev->irq, ioaddr + DATA_PORT); + outb(0, ioaddr + DATA_PORT + 1); + + outw(PP_CS8920_ISAMemB, ioaddr + ADD_PORT); + outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT); + outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1); + } +#endif /* IXDP2x01 */ + + /* Wait until the chip is reset */ + reset_start_time = jiffies; + while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2) + ; +} + + +static void +control_dc_dc(struct net_device *dev, int on_not_off) +{ + struct net_local *lp = netdev_priv(dev); + unsigned int selfcontrol; + int timenow = jiffies; + /* control the DC to DC convertor in the SelfControl register. + Note: This is hooked up to a general purpose pin, might not + always be a DC to DC convertor. */ + + selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */ + if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off) + selfcontrol |= HCB1; + else + selfcontrol &= ~HCB1; + writereg(dev, PP_SelfCTL, selfcontrol); + + /* Wait for the DC/DC converter to power up - 500ms */ + while (jiffies - timenow < HZ) + ; +} + +#define DETECTED_NONE 0 +#define DETECTED_RJ45H 1 +#define DETECTED_RJ45F 2 +#define DETECTED_AUI 3 +#define DETECTED_BNC 4 + +static int +detect_tp(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + int timenow = jiffies; + int fdx; + + if (net_debug > 1) printk("%s: Attempting TP\n", dev->name); + + /* If connected to another full duplex capable 10-Base-T card the link pulses + seem to be lost when the auto detect bit in the LineCTL is set. + To overcome this the auto detect bit will be cleared whilst testing the + 10-Base-T interface. This would not be necessary for the sparrow chip but + is simpler to do it anyway. */ + writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY); + control_dc_dc(dev, 0); + + /* Delay for the hardware to work out if the TP cable is present - 150ms */ + for (timenow = jiffies; jiffies - timenow < 15; ) + ; + if ((readreg(dev, PP_LineST) & LINK_OK) == 0) + return DETECTED_NONE; + + if (lp->chip_type == CS8900) { + switch (lp->force & 0xf0) { +#if 0 + case FORCE_AUTO: + printk("%s: cs8900 doesn't autonegotiate\n",dev->name); + return DETECTED_NONE; +#endif + /* CS8900 doesn't support AUTO, change to HALF*/ + case FORCE_AUTO: + lp->force &= ~FORCE_AUTO; + lp->force |= FORCE_HALF; + break; + case FORCE_HALF: + break; + case FORCE_FULL: + writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900); + break; + } + fdx = readreg(dev, PP_TestCTL) & FDX_8900; + } else { + switch (lp->force & 0xf0) { + case FORCE_AUTO: + lp->auto_neg_cnf = AUTO_NEG_ENABLE; + break; + case FORCE_HALF: + lp->auto_neg_cnf = 0; + break; + case FORCE_FULL: + lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX; + break; + } + + writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK); + + if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) { + printk(KERN_INFO "%s: negotiating duplex...\n",dev->name); + while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) { + if (jiffies - timenow > 4000) { + printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n"); + break; + } + } + } + fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE; + } + if (fdx) + return DETECTED_RJ45F; + else + return DETECTED_RJ45H; +} + +/* send a test packet - return true if carrier bits are ok */ +static int +send_test_pkt(struct net_device *dev) +{ + char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0, + 0, 46, /* A 46 in network order */ + 0, 0, /* DSAP=0 & SSAP=0 fields */ + 0xf3, 0 /* Control (Test Req + P bit set) */ }; + long timenow = jiffies; + + writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON); + + memcpy(test_packet, dev->dev_addr, ETH_ALEN); + memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN); + + writeword(dev, TX_CMD_PORT, TX_AFTER_ALL); + writeword(dev, TX_LEN_PORT, ETH_ZLEN); + + /* Test to see if the chip has allocated memory for the packet */ + while (jiffies - timenow < 5) + if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW) + break; + if (jiffies - timenow >= 5) + return 0; /* this shouldn't happen */ + + /* Write the contents of the packet */ + outsw(dev->base_addr + TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1); + + if (net_debug > 1) printk("Sending test packet "); + /* wait a couple of jiffies for packet to be received */ + for (timenow = jiffies; jiffies - timenow < 3; ) + ; + if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) { + if (net_debug > 1) printk("succeeded\n"); + return 1; + } + if (net_debug > 1) printk("failed\n"); + return 0; +} + + +static int +detect_aui(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name); + control_dc_dc(dev, 0); + + writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY); + + if (send_test_pkt(dev)) + return DETECTED_AUI; + else + return DETECTED_NONE; +} + +static int +detect_bnc(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name); + control_dc_dc(dev, 1); + + writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY); + + if (send_test_pkt(dev)) + return DETECTED_BNC; + else + return DETECTED_NONE; +} + + +static void +write_irq(struct net_device *dev, int chip_type, int irq) +{ + int i; + + if (chip_type == CS8900) { + /* Search the mapping table for the corresponding IRQ pin. */ + for (i = 0; i != sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]); i++) + if (cs8900_irq_map[i] == irq) + break; + /* Not found */ + if (i == sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0])) + i = 3; + writereg(dev, PP_CS8900_ISAINT, i); + } else { + writereg(dev, PP_CS8920_ISAINT, irq); + } +} + +/* Open/initialize the board. This is called (in the current kernel) + sometime after booting when the 'ifconfig' program is run. + + This routine should set everything up anew at each open, even + registers that "should" only need to be set once at boot, so that + there is non-reboot way to recover if something goes wrong. + */ + +/* AKPM: do we need to do any locking here? */ + +static int +net_open(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + int result = 0; + int i; + int ret; + +#ifndef CONFIG_SH_HICOSH4 /* uses irq#1, so this won't work */ + if (dev->irq < 2) { + /* Allow interrupts to be generated by the chip */ +/* Cirrus' release had this: */ +#if 0 + writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ ); +#endif +/* And 2.3.47 had this: */ + writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); + + for (i = 2; i < CS8920_NO_INTS; i++) { + if ((1 << i) & lp->irq_map) { + if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) { + dev->irq = i; + write_irq(dev, lp->chip_type, i); + /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */ + break; + } + } + } + + if (i >= CS8920_NO_INTS) { + writereg(dev, PP_BusCTL, 0); /* disable interrupts. */ + printk(KERN_ERR "cs89x0: can't get an interrupt\n"); + ret = -EAGAIN; + goto bad_out; + } + } + else +#endif + { +#ifndef CONFIG_ARCH_IXDP2X01 + if (((1 << dev->irq) & lp->irq_map) == 0) { + printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n", + dev->name, dev->irq, lp->irq_map); + ret = -EAGAIN; + goto bad_out; + } +#endif +/* FIXME: Cirrus' release had this: */ + writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ ); +/* And 2.3.47 had this: */ +#if 0 + writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); +#endif + write_irq(dev, lp->chip_type, dev->irq); + ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev); + if (ret) { + if (net_debug) + printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq); + goto bad_out; + } + } + +#if ALLOW_DMA + if (lp->use_dma) { + if (lp->isa_config & ANY_ISA_DMA) { + unsigned long flags; + lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL, + get_order(lp->dmasize * 1024)); + + if (!lp->dma_buff) { + printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize); + goto release_irq; + } + if (net_debug > 1) { + printk( "%s: dma %lx %lx\n", + dev->name, + (unsigned long)lp->dma_buff, + (unsigned long)isa_virt_to_bus(lp->dma_buff)); + } + if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS || + !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) { + printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name); + goto release_irq; + } + memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */ + if (request_dma(dev->dma, dev->name)) { + printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma); + goto release_irq; + } + write_dma(dev, lp->chip_type, dev->dma); + lp->rx_dma_ptr = lp->dma_buff; + lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024; + spin_lock_irqsave(&lp->lock, flags); + disable_dma(dev->dma); + clear_dma_ff(dev->dma); + set_dma_mode(dev->dma, 0x14); /* auto_init as well */ + set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff)); + set_dma_count(dev->dma, lp->dmasize*1024); + enable_dma(dev->dma); + spin_unlock_irqrestore(&lp->lock, flags); + } + } +#endif /* ALLOW_DMA */ + + /* set the Ethernet address */ + for (i=0; i < ETH_ALEN/2; i++) + writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8)); + + /* while we're testing the interface, leave interrupts disabled */ + writereg(dev, PP_BusCTL, MEMORY_ON); + + /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */ + if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH)) + lp->linectl = LOW_RX_SQUELCH; + else + lp->linectl = 0; + + /* check to make sure that they have the "right" hardware available */ + switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) { + case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break; + case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break; + case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break; + default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2); + } + if (!result) { + printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name); + release_irq: +#if ALLOW_DMA + release_dma_buff(lp); +#endif + writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON)); + free_irq(dev->irq, dev); + ret = -EAGAIN; + goto bad_out; + } + + /* set the hardware to the configured choice */ + switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) { + case A_CNF_MEDIA_10B_T: + result = detect_tp(dev); + if (result==DETECTED_NONE) { + printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name); + if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ + result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */ + } + break; + case A_CNF_MEDIA_AUI: + result = detect_aui(dev); + if (result==DETECTED_NONE) { + printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name); + if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ + result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */ + } + break; + case A_CNF_MEDIA_10B_2: + result = detect_bnc(dev); + if (result==DETECTED_NONE) { + printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name); + if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ + result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */ + } + break; + case A_CNF_MEDIA_AUTO: + writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET); + if (lp->adapter_cnf & A_CNF_10B_T) + if ((result = detect_tp(dev)) != DETECTED_NONE) + break; + if (lp->adapter_cnf & A_CNF_AUI) + if ((result = detect_aui(dev)) != DETECTED_NONE) + break; + if (lp->adapter_cnf & A_CNF_10B_2) + if ((result = detect_bnc(dev)) != DETECTED_NONE) + break; + printk(KERN_ERR "%s: no media detected\n", dev->name); + goto release_irq; + } + switch(result) { + case DETECTED_NONE: + printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name); + goto release_irq; + case DETECTED_RJ45H: + printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name); + break; + case DETECTED_RJ45F: + printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name); + break; + case DETECTED_AUI: + printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name); + break; + case DETECTED_BNC: + printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name); + break; + } + + /* Turn on both receive and transmit operations */ + writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON); + + /* Receive only error free packets addressed to this card */ + lp->rx_mode = 0; + writereg(dev, PP_RxCTL, DEF_RX_ACCEPT); + + lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL; + + if (lp->isa_config & STREAM_TRANSFER) + lp->curr_rx_cfg |= RX_STREAM_ENBL; +#if ALLOW_DMA + set_dma_cfg(dev); +#endif + writereg(dev, PP_RxCFG, lp->curr_rx_cfg); + + writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL | + TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL); + + writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL | +#if ALLOW_DMA + dma_bufcfg(dev) | +#endif + TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL); + + /* now that we've got our act together, enable everything */ + writereg(dev, PP_BusCTL, ENABLE_IRQ + | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */ +#if ALLOW_DMA + | dma_busctl(dev) +#endif + ); + netif_start_queue(dev); + if (net_debug > 1) + printk("cs89x0: net_open() succeeded\n"); + return 0; +bad_out: + return ret; +} + +static void net_timeout(struct net_device *dev) +{ + /* If we get here, some higher level has decided we are broken. + There should really be a "kick me" function call instead. */ + if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name, + tx_done(dev) ? "IRQ conflict ?" : "network cable problem"); + /* Try to restart the adaptor. */ + netif_wake_queue(dev); +} + +static int net_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + if (net_debug > 3) { + printk("%s: sent %d byte packet of type %x\n", + dev->name, skb->len, + (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]); + } + + /* keep the upload from being interrupted, since we + ask the chip to start transmitting before the + whole packet has been completely uploaded. */ + + spin_lock_irq(&lp->lock); + netif_stop_queue(dev); + + /* initiate a transmit sequence */ + writeword(dev, TX_CMD_PORT, lp->send_cmd); + writeword(dev, TX_LEN_PORT, skb->len); + + /* Test to see if the chip has allocated memory for the packet */ + if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) { + /* + * Gasp! It hasn't. But that shouldn't happen since + * we're waiting for TxOk, so return 1 and requeue this packet. + */ + + spin_unlock_irq(&lp->lock); + if (net_debug) printk("cs89x0: Tx buffer not free!\n"); + return 1; + } + /* Write the contents of the packet */ + outsw(dev->base_addr + TX_FRAME_PORT,skb->data,(skb->len+1) >>1); + spin_unlock_irq(&lp->lock); + dev->trans_start = jiffies; + dev_kfree_skb (skb); + + /* + * We DO NOT call netif_wake_queue() here. + * We also DO NOT call netif_start_queue(). + * + * Either of these would cause another bottom half run through + * net_send_packet() before this packet has fully gone out. That causes + * us to hit the "Gasp!" above and the send is rescheduled. it runs like + * a dog. We just return and wait for the Tx completion interrupt handler + * to restart the netdevice layer + */ + + return 0; +} + +/* The typical workload of the driver: + Handle the network interface interrupts. */ + +static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs * regs) +{ + struct net_device *dev = dev_id; + struct net_local *lp; + int ioaddr, status; + int handled = 0; + + ioaddr = dev->base_addr; + lp = netdev_priv(dev); + + /* we MUST read all the events out of the ISQ, otherwise we'll never + get interrupted again. As a consequence, we can't have any limit + on the number of times we loop in the interrupt handler. The + hardware guarantees that eventually we'll run out of events. Of + course, if you're on a slow machine, and packets are arriving + faster than you can read them off, you're screwed. Hasta la + vista, baby! */ + while ((status = readword(dev, ISQ_PORT))) { + if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status); + handled = 1; + switch(status & ISQ_EVENT_MASK) { + case ISQ_RECEIVER_EVENT: + /* Got a packet(s). */ + net_rx(dev); + break; + case ISQ_TRANSMITTER_EVENT: + lp->stats.tx_packets++; + netif_wake_queue(dev); /* Inform upper layers. */ + if ((status & ( TX_OK | + TX_LOST_CRS | + TX_SQE_ERROR | + TX_LATE_COL | + TX_16_COL)) != TX_OK) { + if ((status & TX_OK) == 0) lp->stats.tx_errors++; + if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++; + if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++; + if (status & TX_LATE_COL) lp->stats.tx_window_errors++; + if (status & TX_16_COL) lp->stats.tx_aborted_errors++; + } + break; + case ISQ_BUFFER_EVENT: + if (status & READY_FOR_TX) { + /* we tried to transmit a packet earlier, + but inexplicably ran out of buffers. + That shouldn't happen since we only ever + load one packet. Shrug. Do the right + thing anyway. */ + netif_wake_queue(dev); /* Inform upper layers. */ + } + if (status & TX_UNDERRUN) { + if (net_debug > 0) printk("%s: transmit underrun\n", dev->name); + lp->send_underrun++; + if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381; + else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL; + /* transmit cycle is done, although + frame wasn't transmitted - this + avoids having to wait for the upper + layers to timeout on us, in the + event of a tx underrun */ + netif_wake_queue(dev); /* Inform upper layers. */ + } +#if ALLOW_DMA + if (lp->use_dma && (status & RX_DMA)) { + int count = readreg(dev, PP_DmaFrameCnt); + while(count) { + if (net_debug > 5) + printk("%s: receiving %d DMA frames\n", dev->name, count); + if (net_debug > 2 && count >1) + printk("%s: receiving %d DMA frames\n", dev->name, count); + dma_rx(dev); + if (--count == 0) + count = readreg(dev, PP_DmaFrameCnt); + if (net_debug > 2 && count > 0) + printk("%s: continuing with %d DMA frames\n", dev->name, count); + } + } +#endif + break; + case ISQ_RX_MISS_EVENT: + lp->stats.rx_missed_errors += (status >>6); + break; + case ISQ_TX_COL_EVENT: + lp->stats.collisions += (status >>6); + break; + } + } + return IRQ_RETVAL(handled); +} + +static void +count_rx_errors(int status, struct net_local *lp) +{ + lp->stats.rx_errors++; + if (status & RX_RUNT) lp->stats.rx_length_errors++; + if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++; + if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT))) + /* per str 172 */ + lp->stats.rx_crc_errors++; + if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++; + return; +} + +/* We have a good packet(s), get it/them out of the buffers. */ +static void +net_rx(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + struct sk_buff *skb; + int status, length; + + int ioaddr = dev->base_addr; + status = inw(ioaddr + RX_FRAME_PORT); + length = inw(ioaddr + RX_FRAME_PORT); + + if ((status & RX_OK) == 0) { + count_rx_errors(status, lp); + return; + } + + /* Malloc up new buffer. */ + skb = dev_alloc_skb(length + 2); + if (skb == NULL) { +#if 0 /* Again, this seems a cruel thing to do */ + printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name); +#endif + lp->stats.rx_dropped++; + return; + } + skb_reserve(skb, 2); /* longword align L3 header */ + skb->dev = dev; + + insw(ioaddr + RX_FRAME_PORT, skb_put(skb, length), length >> 1); + if (length & 1) + skb->data[length-1] = inw(ioaddr + RX_FRAME_PORT); + + if (net_debug > 3) { + printk( "%s: received %d byte packet of type %x\n", + dev->name, length, + (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]); + } + + skb->protocol=eth_type_trans(skb,dev); + netif_rx(skb); + dev->last_rx = jiffies; + lp->stats.rx_packets++; + lp->stats.rx_bytes += length; +} + +#if ALLOW_DMA +static void release_dma_buff(struct net_local *lp) +{ + if (lp->dma_buff) { + free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024)); + lp->dma_buff = NULL; + } +} +#endif + +/* The inverse routine to net_open(). */ +static int +net_close(struct net_device *dev) +{ +#if ALLOW_DMA + struct net_local *lp = netdev_priv(dev); +#endif + + netif_stop_queue(dev); + + writereg(dev, PP_RxCFG, 0); + writereg(dev, PP_TxCFG, 0); + writereg(dev, PP_BufCFG, 0); + writereg(dev, PP_BusCTL, 0); + + free_irq(dev->irq, dev); + +#if ALLOW_DMA + if (lp->use_dma && lp->dma) { + free_dma(dev->dma); + release_dma_buff(lp); + } +#endif + + /* Update the statistics here. */ + return 0; +} + +/* Get the current statistics. This may be called with the card open or + closed. */ +static struct net_device_stats * +net_get_stats(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&lp->lock, flags); + /* Update the statistics from the device registers. */ + lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6); + lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6); + spin_unlock_irqrestore(&lp->lock, flags); + + return &lp->stats; +} + +static void set_multicast_list(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&lp->lock, flags); + if(dev->flags&IFF_PROMISC) + { + lp->rx_mode = RX_ALL_ACCEPT; + } + else if((dev->flags&IFF_ALLMULTI)||dev->mc_list) + { + /* The multicast-accept list is initialized to accept-all, and we + rely on higher-level filtering for now. */ + lp->rx_mode = RX_MULTCAST_ACCEPT; + } + else + lp->rx_mode = 0; + + writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode); + + /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */ + writereg(dev, PP_RxCFG, lp->curr_rx_cfg | + (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0)); + spin_unlock_irqrestore(&lp->lock, flags); +} + + +static int set_mac_address(struct net_device *dev, void *p) +{ + int i; + struct sockaddr *addr = p; + + + if (netif_running(dev)) + return -EBUSY; + + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + + if (net_debug) { + printk("%s: Setting MAC address to ", dev->name); + for (i = 0; i < dev->addr_len; i++) + printk(" %2.2x", dev->dev_addr[i]); + printk(".\n"); + } + /* set the Ethernet address */ + for (i=0; i < ETH_ALEN/2; i++) + writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8)); + + return 0; +} + +#ifdef MODULE + +static struct net_device *dev_cs89x0; + +/* + * Support the 'debug' module parm even if we're compiled for non-debug to + * avoid breaking someone's startup scripts + */ + +static int io; +static int irq; +static int debug; +static char media[8]; +static int duplex=-1; + +static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */ +static int dma; +static int dmasize=16; /* or 64 */ + +module_param(io, int, 0); +module_param(irq, int, 0); +module_param(debug, int, 0); +module_param_string(media, media, sizeof(media), 0); +module_param(duplex, int, 0); +module_param(dma , int, 0); +module_param(dmasize , int, 0); +module_param(use_dma , int, 0); +MODULE_PARM_DESC(io, "cs89x0 I/O base address"); +MODULE_PARM_DESC(irq, "cs89x0 IRQ number"); +#if DEBUGGING +MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)"); +#else +MODULE_PARM_DESC(debug, "(ignored)"); +#endif +MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)"); +/* No other value than -1 for duplex seems to be currently interpreted */ +MODULE_PARM_DESC(duplex, "(ignored)"); +#if ALLOW_DMA +MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0"); +MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0"); +MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)"); +#else +MODULE_PARM_DESC(dma , "(ignored)"); +MODULE_PARM_DESC(dmasize , "(ignored)"); +MODULE_PARM_DESC(use_dma , "(ignored)"); +#endif + +MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>"); +MODULE_LICENSE("GPL"); + + +/* +* media=t - specify media type + or media=2 + or media=aui + or medai=auto +* duplex=0 - specify forced half/full/autonegotiate duplex +* debug=# - debug level + + +* Default Chip Configuration: + * DMA Burst = enabled + * IOCHRDY Enabled = enabled + * UseSA = enabled + * CS8900 defaults to half-duplex if not specified on command-line + * CS8920 defaults to autoneg if not specified on command-line + * Use reset defaults for other config parameters + +* Assumptions: + * media type specified is supported (circuitry is present) + * if memory address is > 1MB, then required mem decode hw is present + * if 10B-2, then agent other than driver will enable DC/DC converter + (hw or software util) + + +*/ + +int +init_module(void) +{ + struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); + struct net_local *lp; + int ret = 0; + +#if DEBUGGING + net_debug = debug; +#else + debug = 0; +#endif + if (!dev) + return -ENOMEM; + + dev->irq = irq; + dev->base_addr = io; + lp = netdev_priv(dev); + +#if ALLOW_DMA + if (use_dma) { + lp->use_dma = use_dma; + lp->dma = dma; + lp->dmasize = dmasize; + } +#endif + + spin_lock_init(&lp->lock); + + /* boy, they'd better get these right */ + if (!strcmp(media, "rj45")) + lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; + else if (!strcmp(media, "aui")) + lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI; + else if (!strcmp(media, "bnc")) + lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2; + else + lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; + + if (duplex==-1) + lp->auto_neg_cnf = AUTO_NEG_ENABLE; + + if (io == 0) { + printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n"); + printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n"); + ret = -EPERM; + goto out; + } else if (io <= 0x1ff) { + ret = -ENXIO; + goto out; + } + +#if ALLOW_DMA + if (use_dma && dmasize != 16 && dmasize != 64) { + printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize); + ret = -EPERM; + goto out; + } +#endif + ret = cs89x0_probe1(dev, io, 1); + if (ret) + goto out; + + if (register_netdev(dev) != 0) { + printk(KERN_ERR "cs89x0.c: No card found at 0x%x\n", io); + ret = -ENXIO; + outw(PP_ChipID, dev->base_addr + ADD_PORT); + release_region(dev->base_addr, NETCARD_IO_EXTENT); + goto out; + } + dev_cs89x0 = dev; + return 0; +out: + free_netdev(dev); + return ret; +} + +void +cleanup_module(void) +{ + unregister_netdev(dev_cs89x0); + outw(PP_ChipID, dev_cs89x0->base_addr + ADD_PORT); + release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT); + free_netdev(dev_cs89x0); +} +#endif /* MODULE */ + +/* + * Local variables: + * version-control: t + * kept-new-versions: 5 + * c-indent-level: 8 + * tab-width: 8 + * End: + * + */ |