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path: root/drivers/net/smc-ultra32.c
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Diffstat (limited to 'drivers/net/smc-ultra32.c')
-rw-r--r--drivers/net/smc-ultra32.c454
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diff --git a/drivers/net/smc-ultra32.c b/drivers/net/smc-ultra32.c
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index 000000000000..b3e397d7ca85
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+++ b/drivers/net/smc-ultra32.c
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+/* smc-ultra32.c: An SMC Ultra32 EISA ethernet driver for linux.
+
+Sources:
+
+ This driver is based on (cloned from) the ISA SMC Ultra driver
+ written by Donald Becker. Modifications to support the EISA
+ version of the card by Paul Gortmaker and Leonard N. Zubkoff.
+
+ This software may be used and distributed according to the terms
+ of the GNU General Public License, incorporated herein by reference.
+
+Theory of Operation:
+
+ The SMC Ultra32C card uses the SMC 83c790 chip which is also
+ found on the ISA SMC Ultra cards. It has a shared memory mode of
+ operation that makes it similar to the ISA version of the card.
+ The main difference is that the EISA card has 32KB of RAM, but
+ only an 8KB window into that memory. The EISA card also can be
+ set for a bus-mastering mode of operation via the ECU, but that
+ is not (and probably will never be) supported by this driver.
+ The ECU should be run to enable shared memory and to disable the
+ bus-mastering feature for use with linux.
+
+ By programming the 8390 to use only 8KB RAM, the modifications
+ to the ISA driver can be limited to the probe and initialization
+ code. This allows easy integration of EISA support into the ISA
+ driver. However, the driver development kit from SMC provided the
+ register information for sliding the 8KB window, and hence the 8390
+ is programmed to use the full 32KB RAM.
+
+ Unfortunately this required code changes outside the probe/init
+ routines, and thus we decided to separate the EISA driver from
+ the ISA one. In this way, ISA users don't end up with a larger
+ driver due to the EISA code, and EISA users don't end up with a
+ larger driver due to the ISA EtherEZ PIO code. The driver is
+ similar to the 3c503/16 driver, in that the window must be set
+ back to the 1st 8KB of space for access to the two 8390 Tx slots.
+
+ In testing, using only 8KB RAM (3 Tx / 5 Rx) didn't appear to
+ be a limiting factor, since the EISA bus could get packets off
+ the card fast enough, but having the use of lots of RAM as Rx
+ space is extra insurance if interrupt latencies become excessive.
+
+*/
+
+static const char *version = "smc-ultra32.c: 06/97 v1.00\n";
+
+
+#include <linux/module.h>
+#include <linux/eisa.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include "8390.h"
+
+#define DRV_NAME "smc-ultra32"
+
+static int ultra32_probe1(struct net_device *dev, int ioaddr);
+static int ultra32_open(struct net_device *dev);
+static void ultra32_reset_8390(struct net_device *dev);
+static void ultra32_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+ int ring_page);
+static void ultra32_block_input(struct net_device *dev, int count,
+ struct sk_buff *skb, int ring_offset);
+static void ultra32_block_output(struct net_device *dev, int count,
+ const unsigned char *buf,
+ const int start_page);
+static int ultra32_close(struct net_device *dev);
+
+#define ULTRA32_CMDREG 0 /* Offset to ASIC command register. */
+#define ULTRA32_RESET 0x80 /* Board reset, in ULTRA32_CMDREG. */
+#define ULTRA32_MEMENB 0x40 /* Enable the shared memory. */
+#define ULTRA32_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
+#define ULTRA32_IO_EXTENT 32
+#define EN0_ERWCNT 0x08 /* Early receive warning count. */
+
+/*
+ * Defines that apply only to the Ultra32 EISA card. Note that
+ * "smc" = 10011 01101 00011 = 0x4da3, and hence !smc8010.cfg translates
+ * into an EISA ID of 0x1080A34D
+ */
+#define ULTRA32_BASE 0xca0
+#define ULTRA32_ID 0x1080a34d
+#define ULTRA32_IDPORT (-0x20) /* 0xc80 */
+/* Config regs 1->7 from the EISA !SMC8010.CFG file. */
+#define ULTRA32_CFG1 0x04 /* 0xca4 */
+#define ULTRA32_CFG2 0x05 /* 0xca5 */
+#define ULTRA32_CFG3 (-0x18) /* 0xc88 */
+#define ULTRA32_CFG4 (-0x17) /* 0xc89 */
+#define ULTRA32_CFG5 (-0x16) /* 0xc8a */
+#define ULTRA32_CFG6 (-0x15) /* 0xc8b */
+#define ULTRA32_CFG7 0x0d /* 0xcad */
+
+static void cleanup_card(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET;
+ /* NB: ultra32_close_card() does free_irq */
+ release_region(ioaddr, ULTRA32_IO_EXTENT);
+ iounmap(ei_status.mem);
+}
+
+/* Probe for the Ultra32. This looks like a 8013 with the station
+ address PROM at I/O ports <base>+8 to <base>+13, with a checksum
+ following.
+*/
+
+struct net_device * __init ultra32_probe(int unit)
+{
+ struct net_device *dev;
+ int base;
+ int irq;
+ int err = -ENODEV;
+
+ if (!EISA_bus)
+ return ERR_PTR(-ENODEV);
+
+ dev = alloc_ei_netdev();
+
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ if (unit >= 0) {
+ sprintf(dev->name, "eth%d", unit);
+ netdev_boot_setup_check(dev);
+ }
+
+ SET_MODULE_OWNER(dev);
+
+ irq = dev->irq;
+
+ /* EISA spec allows for up to 16 slots, but 8 is typical. */
+ for (base = 0x1000 + ULTRA32_BASE; base < 0x9000; base += 0x1000) {
+ if (ultra32_probe1(dev, base) == 0)
+ break;
+ dev->irq = irq;
+ }
+ if (base >= 0x9000)
+ goto out;
+ err = register_netdev(dev);
+ if (err)
+ goto out1;
+ return dev;
+out1:
+ cleanup_card(dev);
+out:
+ free_netdev(dev);
+ return ERR_PTR(err);
+}
+
+static int __init ultra32_probe1(struct net_device *dev, int ioaddr)
+{
+ int i, edge, media, retval;
+ int checksum = 0;
+ const char *model_name;
+ static unsigned version_printed;
+ /* Values from various config regs. */
+ unsigned char idreg;
+ unsigned char reg4;
+ const char *ifmap[] = {"UTP No Link", "", "UTP/AUI", "UTP/BNC"};
+
+ if (!request_region(ioaddr, ULTRA32_IO_EXTENT, DRV_NAME))
+ return -EBUSY;
+
+ if (inb(ioaddr + ULTRA32_IDPORT) == 0xff ||
+ inl(ioaddr + ULTRA32_IDPORT) != ULTRA32_ID) {
+ retval = -ENODEV;
+ goto out;
+ }
+
+ media = inb(ioaddr + ULTRA32_CFG7) & 0x03;
+ edge = inb(ioaddr + ULTRA32_CFG5) & 0x08;
+ printk("SMC Ultra32 in EISA Slot %d, Media: %s, %s IRQs.\n",
+ ioaddr >> 12, ifmap[media],
+ (edge ? "Edge Triggered" : "Level Sensitive"));
+
+ idreg = inb(ioaddr + 7);
+ reg4 = inb(ioaddr + 4) & 0x7f;
+
+ /* Check the ID nibble. */
+ if ((idreg & 0xf0) != 0x20) { /* SMC Ultra */
+ retval = -ENODEV;
+ goto out;
+ }
+
+ /* Select the station address register set. */
+ outb(reg4, ioaddr + 4);
+
+ for (i = 0; i < 8; i++)
+ checksum += inb(ioaddr + 8 + i);
+ if ((checksum & 0xff) != 0xff) {
+ retval = -ENODEV;
+ goto out;
+ }
+
+ if (ei_debug && version_printed++ == 0)
+ printk(version);
+
+ model_name = "SMC Ultra32";
+
+ printk("%s: %s at 0x%X,", dev->name, model_name, ioaddr);
+
+ for (i = 0; i < 6; i++)
+ printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
+
+ /* Switch from the station address to the alternate register set and
+ read the useful registers there. */
+ outb(0x80 | reg4, ioaddr + 4);
+
+ /* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
+ outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
+
+ /* Reset RAM addr. */
+ outb(0x00, ioaddr + 0x0b);
+
+ /* Switch back to the station address register set so that the
+ MS-DOS driver can find the card after a warm boot. */
+ outb(reg4, ioaddr + 4);
+
+ if ((inb(ioaddr + ULTRA32_CFG5) & 0x40) == 0) {
+ printk("\nsmc-ultra32: Card RAM is disabled! "
+ "Run EISA config utility.\n");
+ retval = -ENODEV;
+ goto out;
+ }
+ if ((inb(ioaddr + ULTRA32_CFG2) & 0x04) == 0)
+ printk("\nsmc-ultra32: Ignoring Bus-Master enable bit. "
+ "Run EISA config utility.\n");
+
+ if (dev->irq < 2) {
+ unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
+ int irq = irqmap[inb(ioaddr + ULTRA32_CFG5) & 0x07];
+ if (irq == 0) {
+ printk(", failed to detect IRQ line.\n");
+ retval = -EAGAIN;
+ goto out;
+ }
+ dev->irq = irq;
+ }
+
+ /* The 8390 isn't at the base address, so fake the offset */
+ dev->base_addr = ioaddr + ULTRA32_NIC_OFFSET;
+
+ /* Save RAM address in the unused reg0 to avoid excess inb's. */
+ ei_status.reg0 = inb(ioaddr + ULTRA32_CFG3) & 0xfc;
+
+ dev->mem_start = 0xc0000 + ((ei_status.reg0 & 0x7c) << 11);
+
+ ei_status.name = model_name;
+ ei_status.word16 = 1;
+ ei_status.tx_start_page = 0;
+ ei_status.rx_start_page = TX_PAGES;
+ /* All Ultra32 cards have 32KB memory with an 8KB window. */
+ ei_status.stop_page = 128;
+
+ ei_status.mem = ioremap(dev->mem_start, 0x2000);
+ if (!ei_status.mem) {
+ printk(", failed to ioremap.\n");
+ retval = -ENOMEM;
+ goto out;
+ }
+ dev->mem_end = dev->mem_start + 0x1fff;
+
+ printk(", IRQ %d, 32KB memory, 8KB window at 0x%lx-0x%lx.\n",
+ dev->irq, dev->mem_start, dev->mem_end);
+ ei_status.block_input = &ultra32_block_input;
+ ei_status.block_output = &ultra32_block_output;
+ ei_status.get_8390_hdr = &ultra32_get_8390_hdr;
+ ei_status.reset_8390 = &ultra32_reset_8390;
+ dev->open = &ultra32_open;
+ dev->stop = &ultra32_close;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = ei_poll;
+#endif
+ NS8390_init(dev, 0);
+
+ return 0;
+out:
+ release_region(ioaddr, ULTRA32_IO_EXTENT);
+ return retval;
+}
+
+static int ultra32_open(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC addr */
+ int irq_flags = (inb(ioaddr + ULTRA32_CFG5) & 0x08) ? 0 : SA_SHIRQ;
+ int retval;
+
+ retval = request_irq(dev->irq, ei_interrupt, irq_flags, dev->name, dev);
+ if (retval)
+ return retval;
+
+ outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
+ outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
+ outb(0x84, ioaddr + 5); /* Enable MEM16 & Disable Bus Master. */
+ outb(0x01, ioaddr + 6); /* Enable Interrupts. */
+ /* Set the early receive warning level in window 0 high enough not
+ to receive ERW interrupts. */
+ outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
+ outb(0xff, dev->base_addr + EN0_ERWCNT);
+ ei_open(dev);
+ return 0;
+}
+
+static int ultra32_close(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* CMDREG */
+
+ netif_stop_queue(dev);
+
+ if (ei_debug > 1)
+ printk("%s: Shutting down ethercard.\n", dev->name);
+
+ outb(0x00, ioaddr + ULTRA32_CFG6); /* Disable Interrupts. */
+ outb(0x00, ioaddr + 6); /* Disable interrupts. */
+ free_irq(dev->irq, dev);
+
+ NS8390_init(dev, 0);
+
+ return 0;
+}
+
+static void ultra32_reset_8390(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC base addr */
+
+ outb(ULTRA32_RESET, ioaddr);
+ if (ei_debug > 1) printk("resetting Ultra32, t=%ld...", jiffies);
+ ei_status.txing = 0;
+
+ outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
+ outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
+ outb(0x84, ioaddr + 5); /* Enable MEM16 & Disable Bus Master. */
+ outb(0x01, ioaddr + 6); /* Enable Interrupts. */
+ if (ei_debug > 1) printk("reset done\n");
+ return;
+}
+
+/* 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 ultra32_get_8390_hdr(struct net_device *dev,
+ struct e8390_pkt_hdr *hdr,
+ int ring_page)
+{
+ void __iomem *hdr_start = ei_status.mem + ((ring_page & 0x1f) << 8);
+ unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
+
+ /* Select correct 8KB Window. */
+ outb(ei_status.reg0 | ((ring_page & 0x60) >> 5), RamReg);
+
+#ifdef __BIG_ENDIAN
+ /* Officially this is what we are doing, but the readl() is faster */
+ /* unfortunately it isn't endian aware of the struct */
+ memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
+ hdr->count = le16_to_cpu(hdr->count);
+#else
+ ((unsigned int*)hdr)[0] = readl(hdr_start);
+#endif
+}
+
+/* Block input and output are easy on shared memory ethercards, the only
+ complication is when the ring buffer wraps, or in this case, when a
+ packet spans an 8KB boundary. Note that the current 8KB segment is
+ already set by the get_8390_hdr routine. */
+
+static void ultra32_block_input(struct net_device *dev,
+ int count,
+ struct sk_buff *skb,
+ int ring_offset)
+{
+ void __iomem *xfer_start = ei_status.mem + (ring_offset & 0x1fff);
+ unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
+
+ if ((ring_offset & ~0x1fff) != ((ring_offset + count - 1) & ~0x1fff)) {
+ int semi_count = 8192 - (ring_offset & 0x1FFF);
+ memcpy_fromio(skb->data, xfer_start, semi_count);
+ count -= semi_count;
+ if (ring_offset < 96*256) {
+ /* Select next 8KB Window. */
+ ring_offset += semi_count;
+ outb(ei_status.reg0 | ((ring_offset & 0x6000) >> 13), RamReg);
+ memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
+ } else {
+ /* Select first 8KB Window. */
+ outb(ei_status.reg0, RamReg);
+ memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
+ }
+ } else {
+ /* Packet is in one chunk -- we can copy + cksum. */
+ eth_io_copy_and_sum(skb, xfer_start, count, 0);
+ }
+}
+
+static void ultra32_block_output(struct net_device *dev,
+ int count,
+ const unsigned char *buf,
+ int start_page)
+{
+ void __iomem *xfer_start = ei_status.mem + (start_page<<8);
+ unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
+
+ /* Select first 8KB Window. */
+ outb(ei_status.reg0, RamReg);
+
+ memcpy_toio(xfer_start, buf, count);
+}
+
+#ifdef MODULE
+#define MAX_ULTRA32_CARDS 4 /* Max number of Ultra cards per module */
+static struct net_device *dev_ultra[MAX_ULTRA32_CARDS];
+
+MODULE_DESCRIPTION("SMC Ultra32 EISA ethernet driver");
+MODULE_LICENSE("GPL");
+
+int init_module(void)
+{
+ int this_dev, found = 0;
+
+ for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
+ struct net_device *dev = ultra32_probe(-1);
+ if (IS_ERR(dev))
+ break;
+ dev_ultra[found++] = dev;
+ }
+ if (found)
+ return 0;
+ printk(KERN_WARNING "smc-ultra32.c: No SMC Ultra32 found.\n");
+ return -ENXIO;
+}
+
+void cleanup_module(void)
+{
+ int this_dev;
+
+ for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
+ struct net_device *dev = dev_ultra[this_dev];
+ if (dev) {
+ unregister_netdev(dev);
+ cleanup_card(dev);
+ free_netdev(dev);
+ }
+ }
+}
+#endif /* MODULE */
+