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