diff options
Diffstat (limited to 'drivers/net/ne-h8300.c')
| -rw-r--r-- | drivers/net/ne-h8300.c | 670 |
1 files changed, 670 insertions, 0 deletions
diff --git a/drivers/net/ne-h8300.c b/drivers/net/ne-h8300.c new file mode 100644 index 00000000000..84e291e2493 --- /dev/null +++ b/drivers/net/ne-h8300.c @@ -0,0 +1,670 @@ +/* ne-h8300.c: A NE2000 clone on H8/300 driver for linux. */ +/* + original ne.c + Written 1992-94 by Donald Becker. + + Copyright 1993 United States Government as represented by the + Director, National Security Agency. + + 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 as becker@scyld.com, or C/O + Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 + + H8/300 modified + Yoshinori Sato <ysato@users.sourceforge.jp> +*/ + +static const char version1[] = +"ne-h8300.c:v1.00 2004/04/11 ysato\n"; + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/irq.h> + +#include "8390.h" + +#define DRV_NAME "ne-h8300" + +/* Some defines that people can play with if so inclined. */ + +/* Do we perform extra sanity checks on stuff ? */ +/* #define NE_SANITY_CHECK */ + +/* Do we implement the read before write bugfix ? */ +/* #define NE_RW_BUGFIX */ + +/* Do we have a non std. amount of memory? (in units of 256 byte pages) */ +/* #define PACKETBUF_MEMSIZE 0x40 */ + +/* A zero-terminated list of I/O addresses to be probed at boot. */ + +/* ---- No user-serviceable parts below ---- */ + +#define NE_BASE (dev->base_addr) +#define NE_CMD 0x00 +#define NE_DATAPORT (ei_status.word16?0x20:0x10) /* NatSemi-defined port window offset. */ +#define NE_RESET (ei_status.word16?0x3f:0x1f) /* Issue a read to reset, a write to clear. */ +#define NE_IO_EXTENT (ei_status.word16?0x40:0x20) + +#define NESM_START_PG 0x40 /* First page of TX buffer */ +#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ + +static int ne_probe1(struct net_device *dev, int ioaddr); + +static int ne_open(struct net_device *dev); +static int ne_close(struct net_device *dev); + +static void ne_reset_8390(struct net_device *dev); +static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page); +static void ne_block_input(struct net_device *dev, int count, + struct sk_buff *skb, int ring_offset); +static void ne_block_output(struct net_device *dev, const int count, + const unsigned char *buf, const int start_page); + + +static u32 reg_offset[16]; + +static int __init init_reg_offset(struct net_device *dev,unsigned long base_addr) +{ + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + int i; + unsigned char bus_width; + + bus_width = *(volatile unsigned char *)ABWCR; + bus_width &= 1 << ((base_addr >> 21) & 7); + + for (i = 0; i < sizeof(reg_offset) / sizeof(u32); i++) + if (bus_width == 0) + reg_offset[i] = i * 2 + 1; + else + reg_offset[i] = i; + + ei_local->reg_offset = reg_offset; + return 0; +} + +static int __initdata h8300_ne_count = 0; +#ifdef CONFIG_H8300H_H8MAX +static unsigned long __initdata h8300_ne_base[] = { 0x800600 }; +static int h8300_ne_irq[] = {EXT_IRQ4}; +#endif +#ifdef CONFIG_H8300H_AKI3068NET +static unsigned long __initdata h8300_ne_base[] = { 0x200000 }; +static int h8300_ne_irq[] = {EXT_IRQ5}; +#endif + +static inline int init_dev(struct net_device *dev) +{ + if (h8300_ne_count < (sizeof(h8300_ne_base) / sizeof(unsigned long))) { + dev->base_addr = h8300_ne_base[h8300_ne_count]; + dev->irq = h8300_ne_irq[h8300_ne_count]; + h8300_ne_count++; + return 0; + } else + return -ENODEV; +} + +/* Probe for various non-shared-memory ethercards. + + NEx000-clone boards have a Station Address PROM (SAPROM) in the packet + buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of + the SAPROM, while other supposed NE2000 clones must be detected by their + SA prefix. + + Reading the SAPROM from a word-wide card with the 8390 set in byte-wide + mode results in doubled values, which can be detected and compensated for. + + The probe is also responsible for initializing the card and filling + in the 'dev' and 'ei_status' structures. + + We use the minimum memory size for some ethercard product lines, iff we can't + distinguish models. You can increase the packet buffer size by setting + PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are: + E1010 starts at 0x100 and ends at 0x2000. + E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory") + E2010 starts at 0x100 and ends at 0x4000. + E2010-x starts at 0x100 and ends at 0xffff. */ + +static int __init do_ne_probe(struct net_device *dev) +{ + unsigned int base_addr = dev->base_addr; + + SET_MODULE_OWNER(dev); + + /* First check any supplied i/o locations. User knows best. <cough> */ + if (base_addr > 0x1ff) /* Check a single specified location. */ + return ne_probe1(dev, base_addr); + else if (base_addr != 0) /* Don't probe at all. */ + return -ENXIO; + + return -ENODEV; +} + +static void cleanup_card(struct net_device *dev) +{ + free_irq(dev->irq, dev); + release_region(dev->base_addr, NE_IO_EXTENT); +} + +#ifndef MODULE +struct net_device * __init ne_probe(int unit) +{ + struct net_device *dev = alloc_ei_netdev(); + int err; + + if (!dev) + return ERR_PTR(-ENOMEM); + + if (init_dev(dev)) + return ERR_PTR(-ENODEV); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + err = init_reg_offset(dev, dev->base_addr); + if (err) + goto out; + + err = do_ne_probe(dev); + if (err) + goto out; + err = register_netdev(dev); + if (err) + goto out1; + return dev; +out1: + cleanup_card(dev); +out: + free_netdev(dev); + return ERR_PTR(err); +} +#endif + +static int __init ne_probe1(struct net_device *dev, int ioaddr) +{ + int i; + unsigned char SA_prom[16]; + int wordlength = 2; + const char *name = NULL; + int start_page, stop_page; + int reg0, ret; + static unsigned version_printed; + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + unsigned char bus_width; + + if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME)) + return -EBUSY; + + reg0 = inb_p(ioaddr); + if (reg0 == 0xFF) { + ret = -ENODEV; + goto err_out; + } + + /* Do a preliminary verification that we have a 8390. */ + { + int regd; + outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD); + regd = inb_p(ioaddr + EI_SHIFT(0x0d)); + outb_p(0xff, ioaddr + EI_SHIFT(0x0d)); + outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD); + inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */ + if (inb_p(ioaddr + EN0_COUNTER0) != 0) { + outb_p(reg0, ioaddr + EI_SHIFT(0)); + outb_p(regd, ioaddr + EI_SHIFT(0x0d)); /* Restore the old values. */ + ret = -ENODEV; + goto err_out; + } + } + + if (ei_debug && version_printed++ == 0) + printk(KERN_INFO "%s", version1); + + printk(KERN_INFO "NE*000 ethercard probe at %08x:", ioaddr); + + /* Read the 16 bytes of station address PROM. + We must first initialize registers, similar to NS8390_init(eifdev, 0). + We can't reliably read the SAPROM address without this. + (I learned the hard way!). */ + { + struct {unsigned char value, offset; } program_seq[] = + { + {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ + {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */ + {0x00, EN0_RCNTLO}, /* Clear the count regs. */ + {0x00, EN0_RCNTHI}, + {0x00, EN0_IMR}, /* Mask completion irq. */ + {0xFF, EN0_ISR}, + {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */ + {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ + {32, EN0_RCNTLO}, + {0x00, EN0_RCNTHI}, + {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */ + {0x00, EN0_RSARHI}, + {E8390_RREAD+E8390_START, E8390_CMD}, + }; + + for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) + outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); + + } + bus_width = *(volatile unsigned char *)ABWCR; + bus_width &= 1 << ((ioaddr >> 21) & 7); + ei_status.word16 = (bus_width == 0); /* temporary setting */ + for(i = 0; i < 16 /*sizeof(SA_prom)*/; i++) { + SA_prom[i] = inb_p(ioaddr + NE_DATAPORT); + inb_p(ioaddr + NE_DATAPORT); /* dummy read */ + } + + start_page = NESM_START_PG; + stop_page = NESM_STOP_PG; + + if (bus_width) + wordlength = 1; + else + outb_p(0x49, ioaddr + EN0_DCFG); + + /* Set up the rest of the parameters. */ + name = (wordlength == 2) ? "NE2000" : "NE1000"; + + if (! dev->irq) { + printk(" failed to detect IRQ line.\n"); + ret = -EAGAIN; + goto err_out; + } + + /* Snarf the interrupt now. There's no point in waiting since we cannot + share and the board will usually be enabled. */ + ret = request_irq(dev->irq, ei_interrupt, 0, name, dev); + if (ret) { + printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret); + goto err_out; + } + + dev->base_addr = ioaddr; + + for(i = 0; i < ETHER_ADDR_LEN; i++) { + printk(" %2.2x", SA_prom[i]); + dev->dev_addr[i] = SA_prom[i]; + } + + printk("\n%s: %s found at %#x, using IRQ %d.\n", + dev->name, name, ioaddr, dev->irq); + + ei_status.name = name; + ei_status.tx_start_page = start_page; + ei_status.stop_page = stop_page; + ei_status.word16 = (wordlength == 2); + + ei_status.rx_start_page = start_page + TX_PAGES; +#ifdef PACKETBUF_MEMSIZE + /* Allow the packet buffer size to be overridden by know-it-alls. */ + ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE; +#endif + + ei_status.reset_8390 = &ne_reset_8390; + ei_status.block_input = &ne_block_input; + ei_status.block_output = &ne_block_output; + ei_status.get_8390_hdr = &ne_get_8390_hdr; + ei_status.priv = 0; + dev->open = &ne_open; + dev->stop = &ne_close; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = ei_poll; +#endif + NS8390_init(dev, 0); + return 0; + +err_out: + release_region(ioaddr, NE_IO_EXTENT); + return ret; +} + +static int ne_open(struct net_device *dev) +{ + ei_open(dev); + return 0; +} + +static int ne_close(struct net_device *dev) +{ + if (ei_debug > 1) + printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name); + ei_close(dev); + return 0; +} + +/* Hard reset the card. This used to pause for the same period that a + 8390 reset command required, but that shouldn't be necessary. */ + +static void ne_reset_8390(struct net_device *dev) +{ + unsigned long reset_start_time = jiffies; + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + + if (ei_debug > 1) + printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies); + + /* DON'T change these to inb_p/outb_p or reset will fail on clones. */ + outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET); + + ei_status.txing = 0; + ei_status.dmaing = 0; + + /* This check _should_not_ be necessary, omit eventually. */ + while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0) + if (jiffies - reset_start_time > 2*HZ/100) { + printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name); + break; + } + outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */ +} + +/* Grab the 8390 specific header. Similar to the block_input routine, but + we don't need to be concerned with ring wrap as the header will be at + the start of a page, so we optimize accordingly. */ + +static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) +{ + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + /* This *shouldn't* happen. If it does, it's the last thing you'll see */ + + if (ei_status.dmaing) + { + printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr " + "[DMAstat:%d][irqlock:%d].\n", + dev->name, ei_status.dmaing, ei_status.irqlock); + return; + } + + ei_status.dmaing |= 0x01; + outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD); + outb_p(sizeof(struct e8390_pkt_hdr), NE_BASE + EN0_RCNTLO); + outb_p(0, NE_BASE + EN0_RCNTHI); + outb_p(0, NE_BASE + EN0_RSARLO); /* On page boundary */ + outb_p(ring_page, NE_BASE + EN0_RSARHI); + outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); + + if (ei_status.word16) { + int len; + unsigned short *p = (unsigned short *)hdr; + for (len = sizeof(struct e8390_pkt_hdr)>>1; len > 0; len--) + *p++ = inw(NE_BASE + NE_DATAPORT); + } else + insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)); + + outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ + ei_status.dmaing &= ~0x01; + + le16_to_cpus(&hdr->count); +} + +/* Block input and output, similar to the Crynwr packet driver. If you + are porting to a new ethercard, look at the packet driver source for hints. + The NEx000 doesn't share the on-board packet memory -- you have to put + the packet out through the "remote DMA" dataport using outb. */ + +static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) +{ + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); +#ifdef NE_SANITY_CHECK + int xfer_count = count; +#endif + char *buf = skb->data; + + /* This *shouldn't* happen. If it does, it's the last thing you'll see */ + if (ei_status.dmaing) + { + printk(KERN_EMERG "%s: DMAing conflict in ne_block_input " + "[DMAstat:%d][irqlock:%d].\n", + dev->name, ei_status.dmaing, ei_status.irqlock); + return; + } + ei_status.dmaing |= 0x01; + outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD); + outb_p(count & 0xff, NE_BASE + EN0_RCNTLO); + outb_p(count >> 8, NE_BASE + EN0_RCNTHI); + outb_p(ring_offset & 0xff, NE_BASE + EN0_RSARLO); + outb_p(ring_offset >> 8, NE_BASE + EN0_RSARHI); + outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); + if (ei_status.word16) + { + int len; + unsigned short *p = (unsigned short *)buf; + for (len = count>>1; len > 0; len--) + *p++ = inw(NE_BASE + NE_DATAPORT); + if (count & 0x01) + { + buf[count-1] = inb(NE_BASE + NE_DATAPORT); +#ifdef NE_SANITY_CHECK + xfer_count++; +#endif + } + } else { + insb(NE_BASE + NE_DATAPORT, buf, count); + } + +#ifdef NE_SANITY_CHECK + /* This was for the ALPHA version only, but enough people have + been encountering problems so it is still here. If you see + this message you either 1) have a slightly incompatible clone + or 2) have noise/speed problems with your bus. */ + + if (ei_debug > 1) + { + /* DMA termination address check... */ + int addr, tries = 20; + do { + /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here + -- it's broken for Rx on some cards! */ + int high = inb_p(NE_BASE + EN0_RSARHI); + int low = inb_p(NE_BASE + EN0_RSARLO); + addr = (high << 8) + low; + if (((ring_offset + xfer_count) & 0xff) == low) + break; + } while (--tries > 0); + if (tries <= 0) + printk(KERN_WARNING "%s: RX transfer address mismatch," + "%#4.4x (expected) vs. %#4.4x (actual).\n", + dev->name, ring_offset + xfer_count, addr); + } +#endif + outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ + ei_status.dmaing &= ~0x01; +} + +static void ne_block_output(struct net_device *dev, int count, + const unsigned char *buf, const int start_page) +{ + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + unsigned long dma_start; +#ifdef NE_SANITY_CHECK + int retries = 0; +#endif + + /* Round the count up for word writes. Do we need to do this? + What effect will an odd byte count have on the 8390? + I should check someday. */ + + if (ei_status.word16 && (count & 0x01)) + count++; + + /* This *shouldn't* happen. If it does, it's the last thing you'll see */ + if (ei_status.dmaing) + { + printk(KERN_EMERG "%s: DMAing conflict in ne_block_output." + "[DMAstat:%d][irqlock:%d]\n", + dev->name, ei_status.dmaing, ei_status.irqlock); + return; + } + ei_status.dmaing |= 0x01; + /* We should already be in page 0, but to be safe... */ + outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, NE_BASE + NE_CMD); + +#ifdef NE_SANITY_CHECK +retry: +#endif + +#ifdef NE8390_RW_BUGFIX + /* Handle the read-before-write bug the same way as the + Crynwr packet driver -- the NatSemi method doesn't work. + Actually this doesn't always work either, but if you have + problems with your NEx000 this is better than nothing! */ + + outb_p(0x42, NE_BASE + EN0_RCNTLO); + outb_p(0x00, NE_BASE + EN0_RCNTHI); + outb_p(0x42, NE_BASE + EN0_RSARLO); + outb_p(0x00, NE_BASE + EN0_RSARHI); + outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); + /* Make certain that the dummy read has occurred. */ + udelay(6); +#endif + + outb_p(ENISR_RDC, NE_BASE + EN0_ISR); + + /* Now the normal output. */ + outb_p(count & 0xff, NE_BASE + EN0_RCNTLO); + outb_p(count >> 8, NE_BASE + EN0_RCNTHI); + outb_p(0x00, NE_BASE + EN0_RSARLO); + outb_p(start_page, NE_BASE + EN0_RSARHI); + + outb_p(E8390_RWRITE+E8390_START, NE_BASE + NE_CMD); + if (ei_status.word16) { + int len; + unsigned short *p = (unsigned short *)buf; + for (len = count>>1; len > 0; len--) + outw(*p++, NE_BASE + NE_DATAPORT); + } else { + outsb(NE_BASE + NE_DATAPORT, buf, count); + } + + dma_start = jiffies; + +#ifdef NE_SANITY_CHECK + /* This was for the ALPHA version only, but enough people have + been encountering problems so it is still here. */ + + if (ei_debug > 1) + { + /* DMA termination address check... */ + int addr, tries = 20; + do { + int high = inb_p(NE_BASE + EN0_RSARHI); + int low = inb_p(NE_BASE + EN0_RSARLO); + addr = (high << 8) + low; + if ((start_page << 8) + count == addr) + break; + } while (--tries > 0); + + if (tries <= 0) + { + printk(KERN_WARNING "%s: Tx packet transfer address mismatch," + "%#4.4x (expected) vs. %#4.4x (actual).\n", + dev->name, (start_page << 8) + count, addr); + if (retries++ == 0) + goto retry; + } + } +#endif + + while ((inb_p(NE_BASE + EN0_ISR) & ENISR_RDC) == 0) + if (jiffies - dma_start > 2*HZ/100) { /* 20ms */ + printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name); + ne_reset_8390(dev); + NS8390_init(dev,1); + break; + } + + outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ + ei_status.dmaing &= ~0x01; + return; +} + + +#ifdef MODULE +#define MAX_NE_CARDS 1 /* Max number of NE cards per module */ +static struct net_device *dev_ne[MAX_NE_CARDS]; +static int io[MAX_NE_CARDS]; +static int irq[MAX_NE_CARDS]; +static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */ + +MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); +MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); +MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); +MODULE_PARM_DESC(io, "I/O base address(es)"); +MODULE_PARM_DESC(irq, "IRQ number(s)"); +MODULE_DESCRIPTION("H8/300 NE2000 Ethernet driver"); +MODULE_LICENSE("GPL"); + +/* This is set up so that no ISA autoprobe takes place. We can't guarantee +that the ne2k probe is the last 8390 based probe to take place (as it +is at boot) and so the probe will get confused by any other 8390 cards. +ISA device autoprobes on a running machine are not recommended anyway. */ + +int init_module(void) +{ + int this_dev, found = 0; + int err; + + for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { + struct net_device *dev = alloc_ei_netdev(); + if (!dev) + break; + if (io[this_dev]) { + dev->irq = irq[this_dev]; + dev->mem_end = bad[this_dev]; + dev->base_addr = io[this_dev]; + } else { + dev->base_addr = h8300_ne_base[this_dev]; + dev->irq = h8300_ne_irq[this_dev]; + } + err = init_reg_offset(dev, dev->base_addr); + if (!err) { + if (do_ne_probe(dev) == 0) { + if (register_netdev(dev) == 0) { + dev_ne[found++] = dev; + continue; + } + cleanup_card(dev); + } + } + free_netdev(dev); + if (found) + break; + if (io[this_dev] != 0) + printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", dev->base_addr); + else + printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n"); + return -ENXIO; + } + if (found) + return 0; + return -ENODEV; +} + +void cleanup_module(void) +{ + int this_dev; + + for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { + struct net_device *dev = dev_ne[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} +#endif /* MODULE */ |