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1// SPDX-License-Identifier: GPL-2.02/*3 * jazzsonic.c4 *5 * (C) 2005 Finn Thain6 *7 * Converted to DMA API, and (from the mac68k project) introduced8 * dhd's support for 16-bit cards.9 *10 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)11 *12 * This driver is based on work from Andreas Busse, but most of13 * the code is rewritten.14 *15 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)16 *17 * A driver for the onboard Sonic ethernet controller on Mips Jazz18 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and19 * perhaps others, too)20 */21 22#include <linux/kernel.h>23#include <linux/module.h>24#include <linux/types.h>25#include <linux/fcntl.h>26#include <linux/gfp.h>27#include <linux/interrupt.h>28#include <linux/ioport.h>29#include <linux/in.h>30#include <linux/string.h>31#include <linux/delay.h>32#include <linux/errno.h>33#include <linux/netdevice.h>34#include <linux/etherdevice.h>35#include <linux/skbuff.h>36#include <linux/platform_device.h>37#include <linux/dma-mapping.h>38#include <linux/slab.h>39#include <linux/pgtable.h>40 41#include <asm/bootinfo.h>42#include <asm/io.h>43#include <asm/dma.h>44#include <asm/jazz.h>45#include <asm/jazzdma.h>46 47static char jazz_sonic_string[] = "jazzsonic";48 49#define SONIC_MEM_SIZE 0x10050 51#include "sonic.h"52 53/*54 * Macros to access SONIC registers55 */56#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))57 58#define SONIC_WRITE(reg,val) \59do { \60 *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \61} while (0)62 63/*64 * We cannot use station (ethernet) address prefixes to detect the65 * sonic controller since these are board manufacturer depended.66 * So we check for known Silicon Revision IDs instead.67 */68static unsigned short known_revisions[] =69{70 0x04, /* Mips Magnum 4000 */71 0xffff /* end of list */72};73 74static int jazzsonic_open(struct net_device* dev)75{76 int retval;77 78 retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);79 if (retval) {80 printk(KERN_ERR "%s: unable to get IRQ %d.\n",81 dev->name, dev->irq);82 return retval;83 }84 85 retval = sonic_open(dev);86 if (retval)87 free_irq(dev->irq, dev);88 return retval;89}90 91static int jazzsonic_close(struct net_device* dev)92{93 int err;94 err = sonic_close(dev);95 free_irq(dev->irq, dev);96 return err;97}98 99static const struct net_device_ops sonic_netdev_ops = {100 .ndo_open = jazzsonic_open,101 .ndo_stop = jazzsonic_close,102 .ndo_start_xmit = sonic_send_packet,103 .ndo_get_stats = sonic_get_stats,104 .ndo_set_rx_mode = sonic_multicast_list,105 .ndo_tx_timeout = sonic_tx_timeout,106 .ndo_validate_addr = eth_validate_addr,107 .ndo_set_mac_address = eth_mac_addr,108};109 110static int sonic_probe1(struct net_device *dev)111{112 unsigned int silicon_revision;113 unsigned int val;114 struct sonic_local *lp = netdev_priv(dev);115 int err = -ENODEV;116 int i;117 unsigned char addr[ETH_ALEN];118 119 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))120 return -EBUSY;121 122 /*123 * get the Silicon Revision ID. If this is one of the known124 * one assume that we found a SONIC ethernet controller at125 * the expected location.126 */127 silicon_revision = SONIC_READ(SONIC_SR);128 i = 0;129 while (known_revisions[i] != 0xffff &&130 known_revisions[i] != silicon_revision)131 i++;132 133 if (known_revisions[i] == 0xffff) {134 pr_info("SONIC ethernet controller not found (0x%4x)\n",135 silicon_revision);136 goto out;137 }138 139 /*140 * Put the sonic into software reset, then141 * retrieve and print the ethernet address.142 */143 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);144 SONIC_WRITE(SONIC_CEP,0);145 for (i=0; i<3; i++) {146 val = SONIC_READ(SONIC_CAP0-i);147 addr[i*2] = val;148 addr[i*2+1] = val >> 8;149 }150 eth_hw_addr_set(dev, addr);151 152 lp->dma_bitmode = SONIC_BITMODE32;153 154 err = sonic_alloc_descriptors(dev);155 if (err)156 goto out;157 158 dev->netdev_ops = &sonic_netdev_ops;159 dev->watchdog_timeo = TX_TIMEOUT;160 161 /*162 * clear tally counter163 */164 SONIC_WRITE(SONIC_CRCT,0xffff);165 SONIC_WRITE(SONIC_FAET,0xffff);166 SONIC_WRITE(SONIC_MPT,0xffff);167 168 return 0;169out:170 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);171 return err;172}173 174/*175 * Probe for a SONIC ethernet controller on a Mips Jazz board.176 * Actually probing is superfluous but we're paranoid.177 */178static int jazz_sonic_probe(struct platform_device *pdev)179{180 struct net_device *dev;181 struct sonic_local *lp;182 struct resource *res;183 int err = 0;184 185 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);186 if (!res)187 return -ENODEV;188 189 dev = alloc_etherdev(sizeof(struct sonic_local));190 if (!dev)191 return -ENOMEM;192 193 lp = netdev_priv(dev);194 lp->device = &pdev->dev;195 SET_NETDEV_DEV(dev, &pdev->dev);196 platform_set_drvdata(pdev, dev);197 198 dev->base_addr = res->start;199 dev->irq = platform_get_irq(pdev, 0);200 err = sonic_probe1(dev);201 if (err)202 goto out;203 204 pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",205 dev->base_addr, dev->dev_addr, dev->irq);206 207 sonic_msg_init(dev);208 209 err = register_netdev(dev);210 if (err)211 goto undo_probe1;212 213 return 0;214 215undo_probe1:216 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),217 lp->descriptors, lp->descriptors_laddr);218 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);219out:220 free_netdev(dev);221 222 return err;223}224 225MODULE_DESCRIPTION("Jazz SONIC ethernet driver");226MODULE_ALIAS("platform:jazzsonic");227 228#include "sonic.c"229 230static void jazz_sonic_device_remove(struct platform_device *pdev)231{232 struct net_device *dev = platform_get_drvdata(pdev);233 struct sonic_local* lp = netdev_priv(dev);234 235 unregister_netdev(dev);236 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),237 lp->descriptors, lp->descriptors_laddr);238 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);239 free_netdev(dev);240}241 242static struct platform_driver jazz_sonic_driver = {243 .probe = jazz_sonic_probe,244 .remove_new = jazz_sonic_device_remove,245 .driver = {246 .name = jazz_sonic_string,247 },248};249 250module_platform_driver(jazz_sonic_driver);251