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/system.h> 42#include <asm/pgtable.h> 43#include <asm/io.h> 44#include <asm/dma.h> 45#include <asm/jazz.h> 46#include <asm/jazzdma.h> 47 48static char jazz_sonic_string[] = "jazzsonic"; 49 50#define SONIC_MEM_SIZE 0x100 51 52#include "sonic.h" 53 54/* 55 * Macros to access SONIC registers 56 */ 57#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg)) 58 59#define SONIC_WRITE(reg,val) \ 60do { \ 61 *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \ 62} while (0) 63 64 65/* use 0 for production, 1 for verification, >1 for debug */ 66#ifdef SONIC_DEBUG 67static unsigned int sonic_debug = SONIC_DEBUG; 68#else 69static unsigned int sonic_debug = 1; 70#endif 71 72/* 73 * We cannot use station (ethernet) address prefixes to detect the 74 * sonic controller since these are board manufacturer depended. 75 * So we check for known Silicon Revision IDs instead. 76 */ 77static unsigned short known_revisions[] = 78{ 79 0x04, /* Mips Magnum 4000 */ 80 0xffff /* end of list */ 81}; 82 83static int jazzsonic_open(struct net_device* dev) 84{ 85 int retval; 86 87 retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED, 88 "sonic", dev); 89 if (retval) { 90 printk(KERN_ERR "%s: unable to get IRQ %d.\n", 91 dev->name, dev->irq); 92 return retval; 93 } 94 95 retval = sonic_open(dev); 96 if (retval) 97 free_irq(dev->irq, dev); 98 return retval; 99} 100 101static int jazzsonic_close(struct net_device* dev) 102{ 103 int err; 104 err = sonic_close(dev); 105 free_irq(dev->irq, dev); 106 return err; 107} 108 109static const struct net_device_ops sonic_netdev_ops = { 110 .ndo_open = jazzsonic_open, 111 .ndo_stop = jazzsonic_close, 112 .ndo_start_xmit = sonic_send_packet, 113 .ndo_get_stats = sonic_get_stats, 114 .ndo_set_multicast_list = sonic_multicast_list, 115 .ndo_tx_timeout = sonic_tx_timeout, 116 .ndo_change_mtu = eth_change_mtu, 117 .ndo_validate_addr = eth_validate_addr, 118 .ndo_set_mac_address = eth_mac_addr, 119}; 120 121static int __devinit sonic_probe1(struct net_device *dev) 122{ 123 static unsigned version_printed; 124 unsigned int silicon_revision; 125 unsigned int val; 126 struct sonic_local *lp = netdev_priv(dev); 127 int err = -ENODEV; 128 int i; 129 130 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) 131 return -EBUSY; 132 133 /* 134 * get the Silicon Revision ID. If this is one of the known 135 * one assume that we found a SONIC ethernet controller at 136 * the expected location. 137 */ 138 silicon_revision = SONIC_READ(SONIC_SR); 139 if (sonic_debug > 1) 140 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision); 141 142 i = 0; 143 while (known_revisions[i] != 0xffff && 144 known_revisions[i] != silicon_revision) 145 i++; 146 147 if (known_revisions[i] == 0xffff) { 148 printk("SONIC ethernet controller not found (0x%4x)\n", 149 silicon_revision); 150 goto out; 151 } 152 153 if (sonic_debug && version_printed++ == 0) 154 printk(version); 155 156 printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", 157 dev_name(lp->device), dev->base_addr); 158 159 /* 160 * Put the sonic into software reset, then 161 * retrieve and print the ethernet address. 162 */ 163 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); 164 SONIC_WRITE(SONIC_CEP,0); 165 for (i=0; i<3; i++) { 166 val = SONIC_READ(SONIC_CAP0-i); 167 dev->dev_addr[i*2] = val; 168 dev->dev_addr[i*2+1] = val >> 8; 169 } 170 171 err = -ENOMEM; 172 173 /* Initialize the device structure. */ 174 175 lp->dma_bitmode = SONIC_BITMODE32; 176 177 /* Allocate the entire chunk of memory for the descriptors. 178 Note that this cannot cross a 64K boundary. */ 179 if ((lp->descriptors = dma_alloc_coherent(lp->device, 180 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 181 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) { 182 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", 183 dev_name(lp->device)); 184 goto out; 185 } 186 187 /* Now set up the pointers to point to the appropriate places */ 188 lp->cda = lp->descriptors; 189 lp->tda = lp->cda + (SIZEOF_SONIC_CDA 190 * SONIC_BUS_SCALE(lp->dma_bitmode)); 191 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS 192 * SONIC_BUS_SCALE(lp->dma_bitmode)); 193 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS 194 * SONIC_BUS_SCALE(lp->dma_bitmode)); 195 196 lp->cda_laddr = lp->descriptors_laddr; 197 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA 198 * SONIC_BUS_SCALE(lp->dma_bitmode)); 199 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS 200 * SONIC_BUS_SCALE(lp->dma_bitmode)); 201 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS 202 * SONIC_BUS_SCALE(lp->dma_bitmode)); 203 204 dev->netdev_ops = &sonic_netdev_ops; 205 dev->watchdog_timeo = TX_TIMEOUT; 206 207 /* 208 * clear tally counter 209 */ 210 SONIC_WRITE(SONIC_CRCT,0xffff); 211 SONIC_WRITE(SONIC_FAET,0xffff); 212 SONIC_WRITE(SONIC_MPT,0xffff); 213 214 return 0; 215out: 216 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 217 return err; 218} 219 220/* 221 * Probe for a SONIC ethernet controller on a Mips Jazz board. 222 * Actually probing is superfluous but we're paranoid. 223 */ 224static int __devinit jazz_sonic_probe(struct platform_device *pdev) 225{ 226 struct net_device *dev; 227 struct sonic_local *lp; 228 struct resource *res; 229 int err = 0; 230 231 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 232 if (!res) 233 return -ENODEV; 234 235 dev = alloc_etherdev(sizeof(struct sonic_local)); 236 if (!dev) 237 return -ENOMEM; 238 239 lp = netdev_priv(dev); 240 lp->device = &pdev->dev; 241 SET_NETDEV_DEV(dev, &pdev->dev); 242 platform_set_drvdata(pdev, dev); 243 244 netdev_boot_setup_check(dev); 245 246 dev->base_addr = res->start; 247 dev->irq = platform_get_irq(pdev, 0); 248 err = sonic_probe1(dev); 249 if (err) 250 goto out; 251 err = register_netdev(dev); 252 if (err) 253 goto out1; 254 255 printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq); 256 257 return 0; 258 259out1: 260 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 261out: 262 free_netdev(dev); 263 264 return err; 265} 266 267MODULE_DESCRIPTION("Jazz SONIC ethernet driver"); 268module_param(sonic_debug, int, 0); 269MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)"); 270MODULE_ALIAS("platform:jazzsonic"); 271 272#include "sonic.c" 273 274static int __devexit jazz_sonic_device_remove (struct platform_device *pdev) 275{ 276 struct net_device *dev = platform_get_drvdata(pdev); 277 struct sonic_local* lp = netdev_priv(dev); 278 279 unregister_netdev(dev); 280 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 281 lp->descriptors, lp->descriptors_laddr); 282 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 283 free_netdev(dev); 284 285 return 0; 286} 287 288static struct platform_driver jazz_sonic_driver = { 289 .probe = jazz_sonic_probe, 290 .remove = __devexit_p(jazz_sonic_device_remove), 291 .driver = { 292 .name = jazz_sonic_string, 293 .owner = THIS_MODULE, 294 }, 295}; 296 297static int __init jazz_sonic_init_module(void) 298{ 299 return platform_driver_register(&jazz_sonic_driver); 300} 301 302static void __exit jazz_sonic_cleanup_module(void) 303{ 304 platform_driver_unregister(&jazz_sonic_driver); 305} 306 307module_init(jazz_sonic_init_module); 308module_exit(jazz_sonic_cleanup_module); 309