| /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */ |
| /* |
| Written 1992,1993 by Donald Becker. This is alpha test code. |
| 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 Public License, |
| incorporated herein by reference. |
| |
| This driver should work with many 8390-based ethernet boards. Currently |
| it support the NE1000, NE2000 (and clones), and some Cabletron products. |
| |
| The Author may be reached as becker@super.org or |
| C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715 |
| */ |
| |
| /* Routines for the NatSemi-based designs (NE[12]000). */ |
| |
| static char *version = |
| "ne.c:v0.99-10 5/28/93 Donald Becker (becker@super.org)\n"; |
| |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <asm/io.h> |
| #include <asm/system.h> |
| |
| #include "dev.h" |
| #include "8390.h" |
| |
| /* These should be in <asm/io.h> someday, borrowed from blk_drv/hd.c. */ |
| #define port_read(port,buf,nr) \ |
| __asm__("cld;rep;insw": :"d" (port),"D" (buf),"c" (nr):"cx","di") |
| #define port_write(port,buf,nr) \ |
| __asm__("cld;rep;outsw": :"d" (port),"S" (buf),"c" (nr):"cx","si") |
| |
| #define port_read_b(port,buf,nr) \ |
| __asm__("cld;rep;insb": :"d" (port),"D" (buf),"c" (nr):"cx","di") |
| #define port_write_b(port,buf,nr) \ |
| __asm__("cld;rep;outsb": :"d" (port),"S" (buf),"c" (nr):"cx","si") |
| |
| #define EN_CMD (dev->base_addr) |
| #define NE_BASE (dev->base_addr) |
| #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */ |
| #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */ |
| |
| #define NE1SM_START_PG 0x20 /* First page of TX buffer */ |
| #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */ |
| #define NESM_START_PG 0x40 /* First page of TX buffer */ |
| #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ |
| |
| extern void NS8390_init(struct device *dev, int startp); |
| extern int ei_debug; |
| extern struct sigaction ei_sigaction; |
| |
| int neprobe(int ioaddr, struct device *dev); |
| static int neprobe1(int ioaddr, struct device *dev, int verbose); |
| |
| static void ne_reset_8390(struct device *dev); |
| static int ne_block_input(struct device *dev, int count, |
| char *buf, int ring_offset); |
| static void ne_block_output(struct device *dev, const int count, |
| const unsigned char *buf, const int start_page); |
| |
| |
| /* 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 compansated 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. */ |
| |
| int neprobe(int ioaddr, struct device *dev) |
| { |
| int *port, ports[] = {0x300, 0x280, 0x320, 0x340, 0x360, 0}; |
| |
| if (ioaddr > 0x100) |
| return neprobe1(ioaddr, dev, 1); |
| |
| for (port = &ports[0]; *port; port++) |
| if (inb_p(*port) != 0xff && neprobe1(*port, dev, 0)) |
| return dev->base_addr = *port; |
| return 0; |
| } |
| |
| static int neprobe1(int ioaddr, struct device *dev, int verbose) |
| { |
| int i; |
| unsigned char SA_prom[32]; |
| int wordlength = 2; |
| int neX000, ctron, dlink; |
| |
| |
| if ( inb_p(ioaddr) == 0xFF) { |
| if (verbose) printk("8390 ethercard probe at %#3x failed.\n", ioaddr); |
| return 0; |
| } |
| |
| printk("8390 ethercard probe at %#3x:", ioaddr); |
| |
| /* Read the 16 bytes of station address prom, returning 1 for |
| an eight-bit interface and 2 for a 16-bit interface. |
| 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 {char value, offset; } program_seq[] = { |
| {E8390_NODMA+E8390_PAGE0+E8390_STOP, EN_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, EN_CMD}, |
| }; |
| for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) |
| outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); |
| } |
| for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) { |
| SA_prom[i] = inb_p(ioaddr + NE_DATAPORT); |
| SA_prom[i+1] = inb_p(ioaddr + NE_DATAPORT); |
| if (SA_prom[i] != SA_prom[i+1]) |
| wordlength = 1; |
| } |
| |
| if (wordlength == 2) { |
| /* We must set the 8390 for word mode, AND RESET IT. */ |
| int tmp; |
| outb_p(0x49, ioaddr + EN0_DCFG); |
| tmp = inb_p(NE_BASE + NE_RESET); |
| ei_status.word16 = 1; |
| outb(tmp, NE_BASE + NE_RESET); |
| /* Un-double the SA_prom values. */ |
| for (i = 0; i < 16; i++) |
| SA_prom[i] = SA_prom[i+i]; |
| } else |
| ei_status.word16 = 0; |
| |
| #if defined(show_all_SAPROM) |
| /* If your ethercard isn't detected define this to see the SA_PROM. */ |
| for(i = 0; i < sizeof(SA_prom); i++) |
| printk(" %2.2x", SA_prom[i]); |
| #else |
| for(i = 0; i < ETHER_ADDR_LEN; i++) { |
| dev->dev_addr[i] = SA_prom[i]; |
| printk(" %2.2x", SA_prom[i]); |
| } |
| #endif |
| |
| neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57); |
| ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d); |
| dlink = (SA_prom[0] == 0x00 && SA_prom[1] == 0xDE && SA_prom[2] == 0x01); |
| |
| /* Set up the rest of the parameters. */ |
| if (neX000 && wordlength == 2) { |
| ei_status.name = "NE2000"; |
| ei_status.tx_start_page = NESM_START_PG; |
| ei_status.stop_page = NESM_STOP_PG; |
| } else if (neX000 || dlink) { |
| ei_status.name = neX000 ? "NE1000" : "D-Link"; |
| ei_status.tx_start_page = NE1SM_START_PG; |
| ei_status.stop_page = NE1SM_STOP_PG; |
| } else if (ctron) { |
| ei_status.name = "Cabletron"; |
| ei_status.tx_start_page = 0x01; |
| ei_status.stop_page = (wordlength == 2) ? 0x40 : 0x20; |
| } else { |
| printk(" not found.\n"); |
| return 0; |
| } |
| ei_status.rx_start_page = ei_status.tx_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 |
| dev->base_addr = ioaddr; |
| |
| if (dev->irq < 2) { |
| int nic_base = dev->base_addr; |
| autoirq_setup(0); |
| outb_p(0x50, nic_base + EN0_IMR); /* Enable one interrupt. */ |
| outb_p(0x00, nic_base + EN0_RCNTLO); |
| outb_p(0x00, nic_base + EN0_RCNTHI); |
| outb_p(E8390_RREAD+E8390_START, nic_base); /* Trigger it... */ |
| outb_p(0x00, nic_base + EN0_IMR); /* Mask it again. */ |
| dev->irq = autoirq_report(0); |
| if (ei_debug > 2) |
| printk(" autoirq is %d", dev->irq); |
| } else if (dev->irq == 2) |
| /* Fixup for users that don't know that IRQ 2 is really IRQ 9, |
| or don't know which one to set. */ |
| dev->irq = 9; |
| |
| /* Snarf the interrupt now. There's no point in waiting since we cannot |
| share and the board will usually be enabled. */ |
| { int irqval = irqaction (dev->irq, &ei_sigaction); |
| if (irqval) { |
| printk (" unable to get IRQ %d (irqval=%d).\n", dev->irq, irqval); |
| return 0; |
| } |
| } |
| |
| printk("\n%s: %s found, using IRQ %d.\n", |
| dev->name, ei_status.name, dev->irq); |
| if (ei_debug > 1) |
| printk(version); |
| ei_status.reset_8390 = &ne_reset_8390; |
| ei_status.block_input = &ne_block_input; |
| ei_status.block_output = &ne_block_output; |
| NS8390_init(dev, 0); |
| return dev->base_addr; |
| } |
| |
| /* 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 device *dev) |
| { |
| int tmp = inb_p(NE_BASE + NE_RESET); |
| int reset_start_time = jiffies; |
| |
| if (ei_debug > 1) printk("resetting the 8390 t=%d...", jiffies); |
| ei_status.txing = 0; |
| |
| outb_p(tmp, NE_BASE + NE_RESET); |
| /* This check _should_not_ be necessary, omit eventually. */ |
| while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0) |
| if (jiffies - reset_start_time > 2) { |
| printk("%s: ne_reset_8390() did not complete.\n", dev->name); |
| break; |
| } |
| } |
| |
| /* Block input and output, similar to the Crynwr packet driver. If you |
| porting to a new ethercard look at the packet driver source for hints. |
| The NEx000 doesn't share it on-board packet memory -- you have to put |
| the packet out through the "remote DMA" dataport using outb. */ |
| |
| static int |
| ne_block_input(struct device *dev, int count, char *buf, int ring_offset) |
| { |
| int xfer_count = count; |
| int nic_base = dev->base_addr; |
| |
| if (ei_status.dmaing) { |
| if (ei_debug > 0) |
| printk("%s: DMAing conflict in ne_block_input." |
| "[DMAstat:%1x][irqlock:%1x]\n", |
| dev->name, ei_status.dmaing, ei_status.irqlock); |
| return 0; |
| } |
| ei_status.dmaing |= 0x01; |
| outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, EN_CMD); |
| outb_p(count & 0xff, nic_base + EN0_RCNTLO); |
| outb_p(count >> 8, nic_base + EN0_RCNTHI); |
| outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO); |
| outb_p(ring_offset >> 8, nic_base + EN0_RSARHI); |
| outb_p(E8390_RREAD+E8390_START, EN_CMD); |
| if (ei_status.word16) { |
| port_read(NE_BASE + NE_DATAPORT,buf,count>>1); |
| if (count & 0x01) |
| buf[count-1] = inb(NE_BASE + NE_DATAPORT), xfer_count++; |
| } else { |
| port_read_b(NE_BASE + NE_DATAPORT, buf, count); |
| } |
| |
| /* This was for the ALPHA version only, but enough people have |
| encountering problems that it is still here. */ |
| if (ei_debug > 0) { /* DMA termination address check... */ |
| int addr, tries = 20; |
| do { |
| /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here |
| -- it's broken! Check the "DMA" address instead. */ |
| int high = inb_p(nic_base + EN0_RSARHI); |
| int low = inb_p(nic_base + EN0_RSARLO); |
| addr = (high << 8) + low; |
| if (((ring_offset + xfer_count) & 0xff) == low) |
| break; |
| } while (--tries > 0); |
| if (tries <= 0) |
| printk("%s: RX transfer address mismatch," |
| "%#4.4x (should be) vs. %#4.4x (actual).\n", |
| dev->name, ring_offset + xfer_count, addr); |
| } |
| ei_status.dmaing &= ~0x01; |
| return ring_offset + count; |
| } |
| |
| static void |
| ne_block_output(struct device *dev, int count, |
| const unsigned char *buf, const int start_page) |
| { |
| int retries = 0; |
| int nic_base = NE_BASE; |
| |
| /* 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++; |
| if (ei_status.dmaing) { |
| if (ei_debug > 0) |
| printk("%s: DMAing conflict in ne_block_output." |
| "[DMAstat:%1x][irqlock:%1x]\n", |
| dev->name, ei_status.dmaing, ei_status.irqlock); |
| return; |
| } |
| ei_status.dmaing |= 0x02; |
| /* We should already be in page 0, but to be safe... */ |
| outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, EN_CMD); |
| |
| retry: |
| #if defined(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 aways work either, but if you have |
| problems with your NEx000 this is better than nothing! */ |
| outb_p(0x42, nic_base + EN0_RCNTLO); |
| outb_p(0x00, nic_base + EN0_RCNTHI); |
| outb_p(0x42, nic_base + EN0_RSARLO); |
| outb_p(0x00, nic_base + EN0_RSARHI); |
| outb_p(E8390_RREAD+E8390_START, EN_CMD); |
| /* Make certain that the dummy read has occured. */ |
| SLOW_DOWN_IO; |
| SLOW_DOWN_IO; |
| SLOW_DOWN_IO; |
| #endif /* rw_bugfix */ |
| |
| /* Now the normal output. */ |
| outb_p(count & 0xff, nic_base + EN0_RCNTLO); |
| outb_p(count >> 8, nic_base + EN0_RCNTHI); |
| outb_p(0x00, nic_base + EN0_RSARLO); |
| outb_p(start_page, nic_base + EN0_RSARHI); |
| |
| outb_p(E8390_RWRITE+E8390_START, EN_CMD); |
| if (ei_status.word16) { |
| port_write(NE_BASE + NE_DATAPORT, buf, count>>1); |
| } else { |
| port_write_b(NE_BASE + NE_DATAPORT, buf, count); |
| } |
| |
| /* This was for the ALPHA version only, but enough people have |
| encountering problems that it is still here. */ |
| if (ei_debug > 0) { /* DMA termination address check... */ |
| int addr, tries = 20; |
| do { |
| /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here |
| -- it's broken! Check the "DMA" address instead. */ |
| int high = inb_p(nic_base + EN0_RSARHI); |
| int low = inb_p(nic_base + EN0_RSARLO); |
| addr = (high << 8) + low; |
| if ((start_page << 8) + count == addr) |
| break; |
| } while (--tries > 0); |
| if (tries <= 0) { |
| printk("%s: Packet buffer transfer address mismatch on TX," |
| "%#4.4x vs. %#4.4x.\n", |
| dev->name, (start_page << 8) + count, addr); |
| if (retries++ == 0) |
| goto retry; |
| } |
| } |
| ei_status.dmaing &= ~0x02; |
| return; |
| } |
| |
| |
| /* |
| * Local variables: |
| * compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne.c" |
| * version-control: t |
| * kept-new-versions: 5 |
| * End: |
| */ |