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