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/ioport.h> 28 #include <linux/in.h> 29 #include <linux/string.h> 30 #include <linux/delay.h> 31 #include <linux/errno.h> 32 #include <linux/netdevice.h> 33 #include <linux/etherdevice.h> 34 #include <linux/skbuff.h> 35 #include <linux/platform_device.h> 36 #include <linux/dma-mapping.h> 37 #include <linux/slab.h> 38 39 #include <asm/bootinfo.h> 40 #include <asm/pgtable.h> 41 #include <asm/io.h> 42 #include <asm/dma.h> 43 #include <asm/jazz.h> 44 #include <asm/jazzdma.h> 45 46 static char jazz_sonic_string[] = "jazzsonic"; 47 48 #define SONIC_MEM_SIZE 0x100 49 50 #include "sonic.h" 51 52 /* 53 * Macros to access SONIC registers 54 */ 55 #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg)) 56 57 #define SONIC_WRITE(reg,val) \ 58 do { \ 59 *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \ 60 } while (0) 61 62 63 /* use 0 for production, 1 for verification, >1 for debug */ 64 #ifdef SONIC_DEBUG 65 static unsigned int sonic_debug = SONIC_DEBUG; 66 #else 67 static unsigned int sonic_debug = 1; 68 #endif 69 70 /* 71 * We cannot use station (ethernet) address prefixes to detect the 72 * sonic controller since these are board manufacturer depended. 73 * So we check for known Silicon Revision IDs instead. 74 */ 75 static unsigned short known_revisions[] = 76 { 77 0x04, /* Mips Magnum 4000 */ 78 0xffff /* end of list */ 79 }; 80 81 static int jazzsonic_open(struct net_device* dev) 82 { 83 int retval; 84 85 retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev); 86 if (retval) { 87 printk(KERN_ERR "%s: unable to get IRQ %d.\n", 88 dev->name, dev->irq); 89 return retval; 90 } 91 92 retval = sonic_open(dev); 93 if (retval) 94 free_irq(dev->irq, dev); 95 return retval; 96 } 97 98 static int jazzsonic_close(struct net_device* dev) 99 { 100 int err; 101 err = sonic_close(dev); 102 free_irq(dev->irq, dev); 103 return err; 104 } 105 106 static const struct net_device_ops sonic_netdev_ops = { 107 .ndo_open = jazzsonic_open, 108 .ndo_stop = jazzsonic_close, 109 .ndo_start_xmit = sonic_send_packet, 110 .ndo_get_stats = sonic_get_stats, 111 .ndo_set_rx_mode = sonic_multicast_list, 112 .ndo_tx_timeout = sonic_tx_timeout, 113 .ndo_validate_addr = eth_validate_addr, 114 .ndo_set_mac_address = eth_mac_addr, 115 }; 116 117 static int sonic_probe1(struct net_device *dev) 118 { 119 static unsigned version_printed; 120 unsigned int silicon_revision; 121 unsigned int val; 122 struct sonic_local *lp = netdev_priv(dev); 123 int err = -ENODEV; 124 int i; 125 126 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) 127 return -EBUSY; 128 129 /* 130 * get the Silicon Revision ID. If this is one of the known 131 * one assume that we found a SONIC ethernet controller at 132 * the expected location. 133 */ 134 silicon_revision = SONIC_READ(SONIC_SR); 135 if (sonic_debug > 1) 136 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision); 137 138 i = 0; 139 while (known_revisions[i] != 0xffff && 140 known_revisions[i] != silicon_revision) 141 i++; 142 143 if (known_revisions[i] == 0xffff) { 144 printk("SONIC ethernet controller not found (0x%4x)\n", 145 silicon_revision); 146 goto out; 147 } 148 149 if (sonic_debug && version_printed++ == 0) 150 printk(version); 151 152 printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", 153 dev_name(lp->device), dev->base_addr); 154 155 /* 156 * Put the sonic into software reset, then 157 * retrieve and print the ethernet address. 158 */ 159 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); 160 SONIC_WRITE(SONIC_CEP,0); 161 for (i=0; i<3; i++) { 162 val = SONIC_READ(SONIC_CAP0-i); 163 dev->dev_addr[i*2] = val; 164 dev->dev_addr[i*2+1] = val >> 8; 165 } 166 167 err = -ENOMEM; 168 169 /* Initialize the device structure. */ 170 171 lp->dma_bitmode = SONIC_BITMODE32; 172 173 /* Allocate the entire chunk of memory for the descriptors. 174 Note that this cannot cross a 64K boundary. */ 175 lp->descriptors = dma_alloc_coherent(lp->device, 176 SIZEOF_SONIC_DESC * 177 SONIC_BUS_SCALE(lp->dma_bitmode), 178 &lp->descriptors_laddr, 179 GFP_KERNEL); 180 if (lp->descriptors == NULL) 181 goto out; 182 183 /* Now set up the pointers to point to the appropriate places */ 184 lp->cda = lp->descriptors; 185 lp->tda = lp->cda + (SIZEOF_SONIC_CDA 186 * SONIC_BUS_SCALE(lp->dma_bitmode)); 187 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS 188 * SONIC_BUS_SCALE(lp->dma_bitmode)); 189 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS 190 * SONIC_BUS_SCALE(lp->dma_bitmode)); 191 192 lp->cda_laddr = lp->descriptors_laddr; 193 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA 194 * SONIC_BUS_SCALE(lp->dma_bitmode)); 195 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS 196 * SONIC_BUS_SCALE(lp->dma_bitmode)); 197 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS 198 * SONIC_BUS_SCALE(lp->dma_bitmode)); 199 200 dev->netdev_ops = &sonic_netdev_ops; 201 dev->watchdog_timeo = TX_TIMEOUT; 202 203 /* 204 * clear tally counter 205 */ 206 SONIC_WRITE(SONIC_CRCT,0xffff); 207 SONIC_WRITE(SONIC_FAET,0xffff); 208 SONIC_WRITE(SONIC_MPT,0xffff); 209 210 return 0; 211 out: 212 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 213 return err; 214 } 215 216 /* 217 * Probe for a SONIC ethernet controller on a Mips Jazz board. 218 * Actually probing is superfluous but we're paranoid. 219 */ 220 static int jazz_sonic_probe(struct platform_device *pdev) 221 { 222 struct net_device *dev; 223 struct sonic_local *lp; 224 struct resource *res; 225 int err = 0; 226 227 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 228 if (!res) 229 return -ENODEV; 230 231 dev = alloc_etherdev(sizeof(struct sonic_local)); 232 if (!dev) 233 return -ENOMEM; 234 235 lp = netdev_priv(dev); 236 lp->device = &pdev->dev; 237 SET_NETDEV_DEV(dev, &pdev->dev); 238 platform_set_drvdata(pdev, dev); 239 240 netdev_boot_setup_check(dev); 241 242 dev->base_addr = res->start; 243 dev->irq = platform_get_irq(pdev, 0); 244 err = sonic_probe1(dev); 245 if (err) 246 goto out; 247 err = register_netdev(dev); 248 if (err) 249 goto out1; 250 251 printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq); 252 253 return 0; 254 255 out1: 256 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 257 out: 258 free_netdev(dev); 259 260 return err; 261 } 262 263 MODULE_DESCRIPTION("Jazz SONIC ethernet driver"); 264 module_param(sonic_debug, int, 0); 265 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)"); 266 MODULE_ALIAS("platform:jazzsonic"); 267 268 #include "sonic.c" 269 270 static int jazz_sonic_device_remove(struct platform_device *pdev) 271 { 272 struct net_device *dev = platform_get_drvdata(pdev); 273 struct sonic_local* lp = netdev_priv(dev); 274 275 unregister_netdev(dev); 276 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 277 lp->descriptors, lp->descriptors_laddr); 278 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 279 free_netdev(dev); 280 281 return 0; 282 } 283 284 static struct platform_driver jazz_sonic_driver = { 285 .probe = jazz_sonic_probe, 286 .remove = jazz_sonic_device_remove, 287 .driver = { 288 .name = jazz_sonic_string, 289 }, 290 }; 291 292 module_platform_driver(jazz_sonic_driver); 293