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![Joe Perches](/assets/img/avatar_default.png)
This patch removes from drivers/net/ all the unnecessary return; statements that precede the last closing brace of void functions. It does not remove the returns that are immediately preceded by a label as gcc doesn't like that. It also does not remove null void functions with return. Done via: $ grep -rP --include=*.[ch] -l "return;\n}" net/ | \ xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }' with some cleanups by hand. Compile tested x86 allmodconfig only. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
438 lines
13 KiB
C
438 lines
13 KiB
C
/* hp.c: A HP LAN ethernet driver for linux. */
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/*
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Written 1993-94 by Donald Becker.
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Copyright 1993 United States Government as represented by the
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Director, National Security Agency.
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This software may be used and distributed according to the terms
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of the GNU General Public License, incorporated herein by reference.
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The author may be reached as becker@scyld.com, or C/O
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Scyld Computing Corporation
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410 Severn Ave., Suite 210
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Annapolis MD 21403
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This is a driver for the HP PC-LAN adaptors.
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Sources:
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The Crynwr packet driver.
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*/
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static const char version[] =
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"hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include "8390.h"
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#define DRV_NAME "hp"
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/* A zero-terminated list of I/O addresses to be probed. */
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static unsigned int hppclan_portlist[] __initdata =
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{ 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
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#define HP_IO_EXTENT 32
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#define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
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#define HP_ID 0x07
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#define HP_CONFIGURE 0x08 /* Configuration register. */
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#define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
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#define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
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#define HP_DATAON 0x10 /* Turn on dataport */
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#define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
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#define HP_START_PG 0x00 /* First page of TX buffer */
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#define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
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#define HP_16BSTOP_PG 0xFF /* Same, for 16 bit cards. */
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static int hp_probe1(struct net_device *dev, int ioaddr);
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static void hp_reset_8390(struct net_device *dev);
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static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
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int ring_page);
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static void hp_block_input(struct net_device *dev, int count,
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struct sk_buff *skb , int ring_offset);
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static void hp_block_output(struct net_device *dev, int count,
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const unsigned char *buf, int start_page);
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static void hp_init_card(struct net_device *dev);
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/* The map from IRQ number to HP_CONFIGURE register setting. */
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/* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
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static char irqmap[16] __initdata= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
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/* Probe for an HP LAN adaptor.
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Also initialize the card and fill in STATION_ADDR with the station
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address. */
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static int __init do_hp_probe(struct net_device *dev)
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{
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int i;
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int base_addr = dev->base_addr;
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int irq = dev->irq;
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if (base_addr > 0x1ff) /* Check a single specified location. */
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return hp_probe1(dev, base_addr);
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else if (base_addr != 0) /* Don't probe at all. */
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return -ENXIO;
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for (i = 0; hppclan_portlist[i]; i++) {
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if (hp_probe1(dev, hppclan_portlist[i]) == 0)
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return 0;
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dev->irq = irq;
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}
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return -ENODEV;
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}
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#ifndef MODULE
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struct net_device * __init hp_probe(int unit)
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{
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struct net_device *dev = alloc_eip_netdev();
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int err;
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if (!dev)
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return ERR_PTR(-ENOMEM);
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sprintf(dev->name, "eth%d", unit);
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netdev_boot_setup_check(dev);
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err = do_hp_probe(dev);
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if (err)
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goto out;
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return dev;
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out:
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free_netdev(dev);
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return ERR_PTR(err);
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}
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#endif
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static int __init hp_probe1(struct net_device *dev, int ioaddr)
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{
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int i, retval, board_id, wordmode;
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const char *name;
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static unsigned version_printed;
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if (!request_region(ioaddr, HP_IO_EXTENT, DRV_NAME))
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return -EBUSY;
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/* Check for the HP physical address, 08 00 09 xx xx xx. */
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/* This really isn't good enough: we may pick up HP LANCE boards
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also! Avoid the lance 0x5757 signature. */
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if (inb(ioaddr) != 0x08
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|| inb(ioaddr+1) != 0x00
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|| inb(ioaddr+2) != 0x09
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|| inb(ioaddr+14) == 0x57) {
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retval = -ENODEV;
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goto out;
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}
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/* Set up the parameters based on the board ID.
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If you have additional mappings, please mail them to me -djb. */
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if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
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name = "HP27247";
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wordmode = 1;
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} else {
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name = "HP27250";
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wordmode = 0;
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}
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if (ei_debug && version_printed++ == 0)
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printk(version);
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printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
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for(i = 0; i < ETHER_ADDR_LEN; i++)
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dev->dev_addr[i] = inb(ioaddr + i);
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printk(" %pM", dev->dev_addr);
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/* Snarf the interrupt now. Someday this could be moved to open(). */
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if (dev->irq < 2) {
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int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
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int irq_8list[] = { 7, 5, 3, 4, 9, 0};
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int *irqp = wordmode ? irq_16list : irq_8list;
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do {
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int irq = *irqp;
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if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
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unsigned long cookie = probe_irq_on();
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/* Twinkle the interrupt, and check if it's seen. */
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outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
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outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
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if (irq == probe_irq_off(cookie) /* It's a good IRQ line! */
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&& request_irq (irq, eip_interrupt, 0, DRV_NAME, dev) == 0) {
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printk(" selecting IRQ %d.\n", irq);
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dev->irq = *irqp;
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break;
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}
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}
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} while (*++irqp);
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if (*irqp == 0) {
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printk(" no free IRQ lines.\n");
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retval = -EBUSY;
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goto out;
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}
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} else {
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if (dev->irq == 2)
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dev->irq = 9;
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if ((retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev))) {
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printk (" unable to get IRQ %d.\n", dev->irq);
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goto out;
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}
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}
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/* Set the base address to point to the NIC, not the "real" base! */
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dev->base_addr = ioaddr + NIC_OFFSET;
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dev->netdev_ops = &eip_netdev_ops;
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ei_status.name = name;
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ei_status.word16 = wordmode;
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ei_status.tx_start_page = HP_START_PG;
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ei_status.rx_start_page = HP_START_PG + TX_PAGES;
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ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
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ei_status.reset_8390 = &hp_reset_8390;
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ei_status.get_8390_hdr = &hp_get_8390_hdr;
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ei_status.block_input = &hp_block_input;
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ei_status.block_output = &hp_block_output;
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hp_init_card(dev);
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retval = register_netdev(dev);
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if (retval)
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goto out1;
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return 0;
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out1:
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free_irq(dev->irq, dev);
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out:
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release_region(ioaddr, HP_IO_EXTENT);
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return retval;
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}
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static void
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hp_reset_8390(struct net_device *dev)
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{
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int hp_base = dev->base_addr - NIC_OFFSET;
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int saved_config = inb_p(hp_base + HP_CONFIGURE);
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if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
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outb_p(0x00, hp_base + HP_CONFIGURE);
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ei_status.txing = 0;
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/* Pause just a few cycles for the hardware reset to take place. */
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udelay(5);
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outb_p(saved_config, hp_base + HP_CONFIGURE);
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udelay(5);
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if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
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printk("%s: hp_reset_8390() did not complete.\n", dev->name);
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if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
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}
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static void
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hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
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{
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int nic_base = dev->base_addr;
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int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
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outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
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outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
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outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
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outb_p(0, nic_base + EN0_RCNTHI);
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outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
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outb_p(ring_page, nic_base + EN0_RSARHI);
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outb_p(E8390_RREAD+E8390_START, nic_base);
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if (ei_status.word16)
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insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
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else
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insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
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outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
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}
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/* Block input and output, similar to the Crynwr packet driver. If you are
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porting to a new ethercard look at the packet driver source for hints.
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The HP LAN doesn't use shared memory -- we put the packet
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out through the "remote DMA" dataport. */
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static void
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hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
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{
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int nic_base = dev->base_addr;
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int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
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int xfer_count = count;
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char *buf = skb->data;
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outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
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outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
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outb_p(count & 0xff, nic_base + EN0_RCNTLO);
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outb_p(count >> 8, nic_base + EN0_RCNTHI);
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outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
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outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
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outb_p(E8390_RREAD+E8390_START, nic_base);
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if (ei_status.word16) {
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insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
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if (count & 0x01)
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buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
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} else {
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insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
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}
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/* This is for the ALPHA version only, remove for later releases. */
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if (ei_debug > 0) { /* DMA termination address check... */
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int high = inb_p(nic_base + EN0_RSARHI);
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int low = inb_p(nic_base + EN0_RSARLO);
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int addr = (high << 8) + low;
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/* Check only the lower 8 bits so we can ignore ring wrap. */
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if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
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printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
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dev->name, ring_offset + xfer_count, addr);
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}
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outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
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}
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static void
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hp_block_output(struct net_device *dev, int count,
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const unsigned char *buf, int start_page)
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{
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int nic_base = dev->base_addr;
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int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
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outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
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/* Round the count up for word writes. Do we need to do this?
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What effect will an odd byte count have on the 8390?
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I should check someday. */
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if (ei_status.word16 && (count & 0x01))
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count++;
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/* We should already be in page 0, but to be safe... */
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outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
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#ifdef NE8390_RW_BUGFIX
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/* Handle the read-before-write bug the same way as the
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Crynwr packet driver -- the NatSemi method doesn't work. */
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outb_p(0x42, nic_base + EN0_RCNTLO);
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outb_p(0, nic_base + EN0_RCNTHI);
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outb_p(0xff, nic_base + EN0_RSARLO);
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outb_p(0x00, nic_base + EN0_RSARHI);
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#define NE_CMD 0x00
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outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
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/* Make certain that the dummy read has occurred. */
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inb_p(0x61);
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inb_p(0x61);
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#endif
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outb_p(count & 0xff, nic_base + EN0_RCNTLO);
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outb_p(count >> 8, nic_base + EN0_RCNTHI);
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outb_p(0x00, nic_base + EN0_RSARLO);
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outb_p(start_page, nic_base + EN0_RSARHI);
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outb_p(E8390_RWRITE+E8390_START, nic_base);
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if (ei_status.word16) {
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/* Use the 'rep' sequence for 16 bit boards. */
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outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
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} else {
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outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
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}
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/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
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/* This is for the ALPHA version only, remove for later releases. */
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if (ei_debug > 0) { /* DMA termination address check... */
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int high = inb_p(nic_base + EN0_RSARHI);
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int low = inb_p(nic_base + EN0_RSARLO);
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int addr = (high << 8) + low;
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if ((start_page << 8) + count != addr)
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printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
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dev->name, (start_page << 8) + count, addr);
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}
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outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
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}
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/* This function resets the ethercard if something screws up. */
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static void __init
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hp_init_card(struct net_device *dev)
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{
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int irq = dev->irq;
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NS8390p_init(dev, 0);
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outb_p(irqmap[irq&0x0f] | HP_RUN,
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dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
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}
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#ifdef MODULE
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#define MAX_HP_CARDS 4 /* Max number of HP cards per module */
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static struct net_device *dev_hp[MAX_HP_CARDS];
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static int io[MAX_HP_CARDS];
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static int irq[MAX_HP_CARDS];
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module_param_array(io, int, NULL, 0);
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module_param_array(irq, int, NULL, 0);
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MODULE_PARM_DESC(io, "I/O base address(es)");
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MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
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MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver");
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MODULE_LICENSE("GPL");
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/* This is set up so that only a single autoprobe takes place per call.
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ISA device autoprobes on a running machine are not recommended. */
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int __init
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init_module(void)
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{
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struct net_device *dev;
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int this_dev, found = 0;
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for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
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if (io[this_dev] == 0) {
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if (this_dev != 0) break; /* only autoprobe 1st one */
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printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
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}
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dev = alloc_eip_netdev();
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if (!dev)
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break;
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dev->irq = irq[this_dev];
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dev->base_addr = io[this_dev];
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if (do_hp_probe(dev) == 0) {
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dev_hp[found++] = dev;
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continue;
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}
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free_netdev(dev);
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printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
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break;
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}
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if (found)
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return 0;
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return -ENXIO;
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}
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static void cleanup_card(struct net_device *dev)
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{
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free_irq(dev->irq, dev);
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release_region(dev->base_addr - NIC_OFFSET, HP_IO_EXTENT);
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}
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void __exit
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cleanup_module(void)
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{
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int this_dev;
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for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
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struct net_device *dev = dev_hp[this_dev];
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if (dev) {
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unregister_netdev(dev);
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cleanup_card(dev);
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free_netdev(dev);
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}
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}
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}
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#endif /* MODULE */
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