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19a11bf06c
The data from the kernel command line is no longer used since the
probe function gets it from the platform device resources instead.
The jazz version was changed to be like this in 2007, the xtensa
version apparently copied the code from there.
Fixes: ed9f0e0bf3 ("remove setup of platform device from jazzsonic.c")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
274 lines
6.4 KiB
C
274 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* xtsonic.c
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*
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* (C) 2001 - 2007 Tensilica Inc.
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* Kevin Chea <kchea@yahoo.com>
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* Marc Gauthier <marc@linux-xtensa.org>
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* Chris Zankel <chris@zankel.net>
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*
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* (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
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*
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* This driver is based on work from Andreas Busse, but most of
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* the code is rewritten.
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*
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* (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
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*
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* A driver for the onboard Sonic ethernet controller on the XT2000.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/gfp.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <linux/pgtable.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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static char xtsonic_string[] = "xtsonic";
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extern unsigned xtboard_nvram_valid(void);
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extern void xtboard_get_ether_addr(unsigned char *buf);
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#include "sonic.h"
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/*
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* According to the documentation for the Sonic ethernet controller,
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* EOBC should be 760 words (1520 bytes) for 32-bit applications, and,
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* as such, 2 words less than the buffer size. The value for RBSIZE
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* defined in sonic.h, however is only 1520.
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*
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* (Note that in 16-bit configurations, EOBC is 759 words (1518 bytes) and
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* RBSIZE 1520 bytes)
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*/
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#undef SONIC_RBSIZE
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#define SONIC_RBSIZE 1524
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/*
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* The chip provides 256 byte register space.
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*/
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#define SONIC_MEM_SIZE 0x100
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/*
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* Macros to access SONIC registers
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*/
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#define SONIC_READ(reg) \
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(0xffff & *((volatile unsigned int *)dev->base_addr+reg))
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#define SONIC_WRITE(reg,val) \
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*((volatile unsigned int *)dev->base_addr+reg) = val
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/*
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* We cannot use station (ethernet) address prefixes to detect the
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* sonic controller since these are board manufacturer depended.
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* So we check for known Silicon Revision IDs instead.
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*/
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static unsigned short known_revisions[] =
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{
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0x101, /* SONIC 83934 */
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0xffff /* end of list */
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};
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static int xtsonic_open(struct net_device *dev)
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{
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int retval;
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retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);
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if (retval) {
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printk(KERN_ERR "%s: unable to get IRQ %d.\n",
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dev->name, dev->irq);
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return -EAGAIN;
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}
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retval = sonic_open(dev);
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if (retval)
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free_irq(dev->irq, dev);
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return retval;
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}
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static int xtsonic_close(struct net_device *dev)
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{
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int err;
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err = sonic_close(dev);
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free_irq(dev->irq, dev);
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return err;
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}
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static const struct net_device_ops xtsonic_netdev_ops = {
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.ndo_open = xtsonic_open,
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.ndo_stop = xtsonic_close,
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.ndo_start_xmit = sonic_send_packet,
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.ndo_get_stats = sonic_get_stats,
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.ndo_set_rx_mode = sonic_multicast_list,
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.ndo_tx_timeout = sonic_tx_timeout,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_mac_address = eth_mac_addr,
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};
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static int __init sonic_probe1(struct net_device *dev)
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{
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unsigned int silicon_revision;
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struct sonic_local *lp = netdev_priv(dev);
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unsigned int base_addr = dev->base_addr;
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int i;
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int err = 0;
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if (!request_mem_region(base_addr, 0x100, xtsonic_string))
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return -EBUSY;
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/*
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* get the Silicon Revision ID. If this is one of the known
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* one assume that we found a SONIC ethernet controller at
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* the expected location.
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*/
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silicon_revision = SONIC_READ(SONIC_SR);
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i = 0;
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while ((known_revisions[i] != 0xffff) &&
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(known_revisions[i] != silicon_revision))
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i++;
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if (known_revisions[i] == 0xffff) {
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pr_info("SONIC ethernet controller not found (0x%4x)\n",
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silicon_revision);
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return -ENODEV;
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}
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/*
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* Put the sonic into software reset, then retrieve ethernet address.
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* Note: we are assuming that the boot-loader has initialized the cam.
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*/
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SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
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SONIC_WRITE(SONIC_DCR,
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SONIC_DCR_WC0|SONIC_DCR_DW|SONIC_DCR_LBR|SONIC_DCR_SBUS);
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SONIC_WRITE(SONIC_CEP,0);
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SONIC_WRITE(SONIC_IMR,0);
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SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
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SONIC_WRITE(SONIC_CEP,0);
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for (i=0; i<3; i++) {
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unsigned int val = SONIC_READ(SONIC_CAP0-i);
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dev->dev_addr[i*2] = val;
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dev->dev_addr[i*2+1] = val >> 8;
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}
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lp->dma_bitmode = SONIC_BITMODE32;
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err = sonic_alloc_descriptors(dev);
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if (err)
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goto out;
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dev->netdev_ops = &xtsonic_netdev_ops;
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dev->watchdog_timeo = TX_TIMEOUT;
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/*
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* clear tally counter
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*/
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SONIC_WRITE(SONIC_CRCT,0xffff);
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SONIC_WRITE(SONIC_FAET,0xffff);
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SONIC_WRITE(SONIC_MPT,0xffff);
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return 0;
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out:
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release_region(dev->base_addr, SONIC_MEM_SIZE);
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return err;
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}
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/*
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* Probe for a SONIC ethernet controller on an XT2000 board.
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* Actually probing is superfluous but we're paranoid.
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*/
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int xtsonic_probe(struct platform_device *pdev)
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{
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struct net_device *dev;
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struct sonic_local *lp;
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struct resource *resmem, *resirq;
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int err = 0;
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if ((resmem = platform_get_resource(pdev, IORESOURCE_MEM, 0)) == NULL)
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return -ENODEV;
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if ((resirq = platform_get_resource(pdev, IORESOURCE_IRQ, 0)) == NULL)
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return -ENODEV;
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if ((dev = alloc_etherdev(sizeof(struct sonic_local))) == NULL)
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return -ENOMEM;
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lp = netdev_priv(dev);
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lp->device = &pdev->dev;
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platform_set_drvdata(pdev, dev);
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SET_NETDEV_DEV(dev, &pdev->dev);
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dev->base_addr = resmem->start;
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dev->irq = resirq->start;
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if ((err = sonic_probe1(dev)))
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goto out;
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pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
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dev->base_addr, dev->dev_addr, dev->irq);
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sonic_msg_init(dev);
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if ((err = register_netdev(dev)))
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goto undo_probe1;
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return 0;
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undo_probe1:
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dma_free_coherent(lp->device,
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SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
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lp->descriptors, lp->descriptors_laddr);
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release_region(dev->base_addr, SONIC_MEM_SIZE);
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out:
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free_netdev(dev);
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return err;
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}
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MODULE_DESCRIPTION("Xtensa XT2000 SONIC ethernet driver");
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#include "sonic.c"
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static int xtsonic_device_remove(struct platform_device *pdev)
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{
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struct net_device *dev = platform_get_drvdata(pdev);
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struct sonic_local *lp = netdev_priv(dev);
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unregister_netdev(dev);
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dma_free_coherent(lp->device,
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SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
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lp->descriptors, lp->descriptors_laddr);
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release_region (dev->base_addr, SONIC_MEM_SIZE);
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free_netdev(dev);
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return 0;
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}
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static struct platform_driver xtsonic_driver = {
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.probe = xtsonic_probe,
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.remove = xtsonic_device_remove,
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.driver = {
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.name = xtsonic_string,
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},
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};
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module_platform_driver(xtsonic_driver);
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