jazzsonic.c revision 6980cbe4a6dbb3d7871e99a3cbc74a572d14d327
1/* 2 * jazzsonic.c 3 * 4 * (C) 2005 Finn Thain 5 * 6 * Converted to DMA API, and (from the mac68k project) introduced 7 * dhd's support for 16-bit cards. 8 * 9 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de) 10 * 11 * This driver is based on work from Andreas Busse, but most of 12 * the code is rewritten. 13 * 14 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de) 15 * 16 * A driver for the onboard Sonic ethernet controller on Mips Jazz 17 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and 18 * perhaps others, too) 19 */ 20 21#include <linux/kernel.h> 22#include <linux/module.h> 23#include <linux/types.h> 24#include <linux/fcntl.h> 25#include <linux/gfp.h> 26#include <linux/interrupt.h> 27#include <linux/init.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 40#include <asm/bootinfo.h> 41#include <asm/pgtable.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 0x100 50 51#include "sonic.h" 52 53/* 54 * Macros to access SONIC registers 55 */ 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/* use 0 for production, 1 for verification, >1 for debug */ 65#ifdef SONIC_DEBUG 66static unsigned int sonic_debug = SONIC_DEBUG; 67#else 68static unsigned int sonic_debug = 1; 69#endif 70 71/* 72 * We cannot use station (ethernet) address prefixes to detect the 73 * sonic controller since these are board manufacturer depended. 74 * So we check for known Silicon Revision IDs instead. 75 */ 76static unsigned short known_revisions[] = 77{ 78 0x04, /* Mips Magnum 4000 */ 79 0xffff /* end of list */ 80}; 81 82static int jazzsonic_open(struct net_device* dev) 83{ 84 int retval; 85 86 retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED, 87 "sonic", dev); 88 if (retval) { 89 printk(KERN_ERR "%s: unable to get IRQ %d.\n", 90 dev->name, dev->irq); 91 return retval; 92 } 93 94 retval = sonic_open(dev); 95 if (retval) 96 free_irq(dev->irq, dev); 97 return retval; 98} 99 100static int jazzsonic_close(struct net_device* dev) 101{ 102 int err; 103 err = sonic_close(dev); 104 free_irq(dev->irq, dev); 105 return err; 106} 107 108static const struct net_device_ops sonic_netdev_ops = { 109 .ndo_open = jazzsonic_open, 110 .ndo_stop = jazzsonic_close, 111 .ndo_start_xmit = sonic_send_packet, 112 .ndo_get_stats = sonic_get_stats, 113 .ndo_set_rx_mode = sonic_multicast_list, 114 .ndo_tx_timeout = sonic_tx_timeout, 115 .ndo_change_mtu = eth_change_mtu, 116 .ndo_validate_addr = eth_validate_addr, 117 .ndo_set_mac_address = eth_mac_addr, 118}; 119 120static int sonic_probe1(struct net_device *dev) 121{ 122 static unsigned version_printed; 123 unsigned int silicon_revision; 124 unsigned int val; 125 struct sonic_local *lp = netdev_priv(dev); 126 int err = -ENODEV; 127 int i; 128 129 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) 130 return -EBUSY; 131 132 /* 133 * get the Silicon Revision ID. If this is one of the known 134 * one assume that we found a SONIC ethernet controller at 135 * the expected location. 136 */ 137 silicon_revision = SONIC_READ(SONIC_SR); 138 if (sonic_debug > 1) 139 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision); 140 141 i = 0; 142 while (known_revisions[i] != 0xffff && 143 known_revisions[i] != silicon_revision) 144 i++; 145 146 if (known_revisions[i] == 0xffff) { 147 printk("SONIC ethernet controller not found (0x%4x)\n", 148 silicon_revision); 149 goto out; 150 } 151 152 if (sonic_debug && version_printed++ == 0) 153 printk(version); 154 155 printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", 156 dev_name(lp->device), dev->base_addr); 157 158 /* 159 * Put the sonic into software reset, then 160 * retrieve and print the ethernet address. 161 */ 162 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); 163 SONIC_WRITE(SONIC_CEP,0); 164 for (i=0; i<3; i++) { 165 val = SONIC_READ(SONIC_CAP0-i); 166 dev->dev_addr[i*2] = val; 167 dev->dev_addr[i*2+1] = val >> 8; 168 } 169 170 err = -ENOMEM; 171 172 /* Initialize the device structure. */ 173 174 lp->dma_bitmode = SONIC_BITMODE32; 175 176 /* Allocate the entire chunk of memory for the descriptors. 177 Note that this cannot cross a 64K boundary. */ 178 if ((lp->descriptors = dma_alloc_coherent(lp->device, 179 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 180 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) { 181 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", 182 dev_name(lp->device)); 183 goto out; 184 } 185 186 /* Now set up the pointers to point to the appropriate places */ 187 lp->cda = lp->descriptors; 188 lp->tda = lp->cda + (SIZEOF_SONIC_CDA 189 * SONIC_BUS_SCALE(lp->dma_bitmode)); 190 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS 191 * SONIC_BUS_SCALE(lp->dma_bitmode)); 192 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS 193 * SONIC_BUS_SCALE(lp->dma_bitmode)); 194 195 lp->cda_laddr = lp->descriptors_laddr; 196 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA 197 * SONIC_BUS_SCALE(lp->dma_bitmode)); 198 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS 199 * SONIC_BUS_SCALE(lp->dma_bitmode)); 200 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS 201 * SONIC_BUS_SCALE(lp->dma_bitmode)); 202 203 dev->netdev_ops = &sonic_netdev_ops; 204 dev->watchdog_timeo = TX_TIMEOUT; 205 206 /* 207 * clear tally counter 208 */ 209 SONIC_WRITE(SONIC_CRCT,0xffff); 210 SONIC_WRITE(SONIC_FAET,0xffff); 211 SONIC_WRITE(SONIC_MPT,0xffff); 212 213 return 0; 214out: 215 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 216 return err; 217} 218 219/* 220 * Probe for a SONIC ethernet controller on a Mips Jazz board. 221 * Actually probing is superfluous but we're paranoid. 222 */ 223static int jazz_sonic_probe(struct platform_device *pdev) 224{ 225 struct net_device *dev; 226 struct sonic_local *lp; 227 struct resource *res; 228 int err = 0; 229 230 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 231 if (!res) 232 return -ENODEV; 233 234 dev = alloc_etherdev(sizeof(struct sonic_local)); 235 if (!dev) 236 return -ENOMEM; 237 238 lp = netdev_priv(dev); 239 lp->device = &pdev->dev; 240 SET_NETDEV_DEV(dev, &pdev->dev); 241 platform_set_drvdata(pdev, dev); 242 243 netdev_boot_setup_check(dev); 244 245 dev->base_addr = res->start; 246 dev->irq = platform_get_irq(pdev, 0); 247 err = sonic_probe1(dev); 248 if (err) 249 goto out; 250 err = register_netdev(dev); 251 if (err) 252 goto out1; 253 254 printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq); 255 256 return 0; 257 258out1: 259 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 260out: 261 free_netdev(dev); 262 263 return err; 264} 265 266MODULE_DESCRIPTION("Jazz SONIC ethernet driver"); 267module_param(sonic_debug, int, 0); 268MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)"); 269MODULE_ALIAS("platform:jazzsonic"); 270 271#include "sonic.c" 272 273static int jazz_sonic_device_remove(struct platform_device *pdev) 274{ 275 struct net_device *dev = platform_get_drvdata(pdev); 276 struct sonic_local* lp = netdev_priv(dev); 277 278 unregister_netdev(dev); 279 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 280 lp->descriptors, lp->descriptors_laddr); 281 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 282 free_netdev(dev); 283 284 return 0; 285} 286 287static struct platform_driver jazz_sonic_driver = { 288 .probe = jazz_sonic_probe, 289 .remove = jazz_sonic_device_remove, 290 .driver = { 291 .name = jazz_sonic_string, 292 .owner = THIS_MODULE, 293 }, 294}; 295 296module_platform_driver(jazz_sonic_driver); 297