| 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/interrupt.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/ioport.h> |
| 28 | #include <linux/in.h> |
| 29 | #include <linux/slab.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 | |
| 39 | #include <asm/bootinfo.h> |
| 40 | #include <asm/system.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 | if (request_irq(dev->irq, &sonic_interrupt, IRQF_DISABLED, "sonic", dev)) { |
| 85 | printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq); |
| 86 | return -EAGAIN; |
| 87 | } |
| 88 | return sonic_open(dev); |
| 89 | } |
| 90 | |
| 91 | static int jazzsonic_close(struct net_device* dev) |
| 92 | { |
| 93 | int err; |
| 94 | err = sonic_close(dev); |
| 95 | free_irq(dev->irq, dev); |
| 96 | return err; |
| 97 | } |
| 98 | |
| 99 | static const struct net_device_ops sonic_netdev_ops = { |
| 100 | .ndo_open = jazzsonic_open, |
| 101 | .ndo_stop = jazzsonic_close, |
| 102 | .ndo_start_xmit = sonic_send_packet, |
| 103 | .ndo_get_stats = sonic_get_stats, |
| 104 | .ndo_set_multicast_list = sonic_multicast_list, |
| 105 | .ndo_tx_timeout = sonic_tx_timeout, |
| 106 | .ndo_change_mtu = eth_change_mtu, |
| 107 | .ndo_validate_addr = eth_validate_addr, |
| 108 | .ndo_set_mac_address = eth_mac_addr, |
| 109 | }; |
| 110 | |
| 111 | static int __devinit sonic_probe1(struct net_device *dev) |
| 112 | { |
| 113 | static unsigned version_printed; |
| 114 | unsigned int silicon_revision; |
| 115 | unsigned int val; |
| 116 | struct sonic_local *lp = netdev_priv(dev); |
| 117 | int err = -ENODEV; |
| 118 | int i; |
| 119 | |
| 120 | if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) |
| 121 | return -EBUSY; |
| 122 | |
| 123 | /* |
| 124 | * get the Silicon Revision ID. If this is one of the known |
| 125 | * one assume that we found a SONIC ethernet controller at |
| 126 | * the expected location. |
| 127 | */ |
| 128 | silicon_revision = SONIC_READ(SONIC_SR); |
| 129 | if (sonic_debug > 1) |
| 130 | printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision); |
| 131 | |
| 132 | i = 0; |
| 133 | while (known_revisions[i] != 0xffff |
| 134 | && known_revisions[i] != silicon_revision) |
| 135 | i++; |
| 136 | |
| 137 | if (known_revisions[i] == 0xffff) { |
| 138 | printk("SONIC ethernet controller not found (0x%4x)\n", |
| 139 | silicon_revision); |
| 140 | goto out; |
| 141 | } |
| 142 | |
| 143 | if (sonic_debug && version_printed++ == 0) |
| 144 | printk(version); |
| 145 | |
| 146 | printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", |
| 147 | dev_name(lp->device), dev->base_addr); |
| 148 | |
| 149 | /* |
| 150 | * Put the sonic into software reset, then |
| 151 | * retrieve and print the ethernet address. |
| 152 | */ |
| 153 | SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); |
| 154 | SONIC_WRITE(SONIC_CEP,0); |
| 155 | for (i=0; i<3; i++) { |
| 156 | val = SONIC_READ(SONIC_CAP0-i); |
| 157 | dev->dev_addr[i*2] = val; |
| 158 | dev->dev_addr[i*2+1] = val >> 8; |
| 159 | } |
| 160 | |
| 161 | err = -ENOMEM; |
| 162 | |
| 163 | /* Initialize the device structure. */ |
| 164 | |
| 165 | lp->dma_bitmode = SONIC_BITMODE32; |
| 166 | |
| 167 | /* Allocate the entire chunk of memory for the descriptors. |
| 168 | Note that this cannot cross a 64K boundary. */ |
| 169 | if ((lp->descriptors = dma_alloc_coherent(lp->device, |
| 170 | SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), |
| 171 | &lp->descriptors_laddr, GFP_KERNEL)) == NULL) { |
| 172 | printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", |
| 173 | dev_name(lp->device)); |
| 174 | goto out; |
| 175 | } |
| 176 | |
| 177 | /* Now set up the pointers to point to the appropriate places */ |
| 178 | lp->cda = lp->descriptors; |
| 179 | lp->tda = lp->cda + (SIZEOF_SONIC_CDA |
| 180 | * SONIC_BUS_SCALE(lp->dma_bitmode)); |
| 181 | lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS |
| 182 | * SONIC_BUS_SCALE(lp->dma_bitmode)); |
| 183 | lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS |
| 184 | * SONIC_BUS_SCALE(lp->dma_bitmode)); |
| 185 | |
| 186 | lp->cda_laddr = lp->descriptors_laddr; |
| 187 | lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA |
| 188 | * SONIC_BUS_SCALE(lp->dma_bitmode)); |
| 189 | lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS |
| 190 | * SONIC_BUS_SCALE(lp->dma_bitmode)); |
| 191 | lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS |
| 192 | * SONIC_BUS_SCALE(lp->dma_bitmode)); |
| 193 | |
| 194 | dev->netdev_ops = &sonic_netdev_ops; |
| 195 | dev->watchdog_timeo = TX_TIMEOUT; |
| 196 | |
| 197 | /* |
| 198 | * clear tally counter |
| 199 | */ |
| 200 | SONIC_WRITE(SONIC_CRCT,0xffff); |
| 201 | SONIC_WRITE(SONIC_FAET,0xffff); |
| 202 | SONIC_WRITE(SONIC_MPT,0xffff); |
| 203 | |
| 204 | return 0; |
| 205 | out: |
| 206 | release_mem_region(dev->base_addr, SONIC_MEM_SIZE); |
| 207 | return err; |
| 208 | } |
| 209 | |
| 210 | /* |
| 211 | * Probe for a SONIC ethernet controller on a Mips Jazz board. |
| 212 | * Actually probing is superfluous but we're paranoid. |
| 213 | */ |
| 214 | static int __devinit jazz_sonic_probe(struct platform_device *pdev) |
| 215 | { |
| 216 | struct net_device *dev; |
| 217 | struct sonic_local *lp; |
| 218 | struct resource *res; |
| 219 | int err = 0; |
| 220 | |
| 221 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 222 | if (!res) |
| 223 | return -ENODEV; |
| 224 | |
| 225 | dev = alloc_etherdev(sizeof(struct sonic_local)); |
| 226 | if (!dev) |
| 227 | return -ENOMEM; |
| 228 | |
| 229 | lp = netdev_priv(dev); |
| 230 | lp->device = &pdev->dev; |
| 231 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 232 | platform_set_drvdata(pdev, dev); |
| 233 | |
| 234 | netdev_boot_setup_check(dev); |
| 235 | |
| 236 | dev->base_addr = res->start; |
| 237 | dev->irq = platform_get_irq(pdev, 0); |
| 238 | err = sonic_probe1(dev); |
| 239 | if (err) |
| 240 | goto out; |
| 241 | err = register_netdev(dev); |
| 242 | if (err) |
| 243 | goto out1; |
| 244 | |
| 245 | printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq); |
| 246 | |
| 247 | return 0; |
| 248 | |
| 249 | out1: |
| 250 | release_mem_region(dev->base_addr, SONIC_MEM_SIZE); |
| 251 | out: |
| 252 | free_netdev(dev); |
| 253 | |
| 254 | return err; |
| 255 | } |
| 256 | |
| 257 | MODULE_DESCRIPTION("Jazz SONIC ethernet driver"); |
| 258 | module_param(sonic_debug, int, 0); |
| 259 | MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)"); |
| 260 | MODULE_ALIAS("platform:jazzsonic"); |
| 261 | |
| 262 | #include "sonic.c" |
| 263 | |
| 264 | static int __devexit jazz_sonic_device_remove (struct platform_device *pdev) |
| 265 | { |
| 266 | struct net_device *dev = platform_get_drvdata(pdev); |
| 267 | struct sonic_local* lp = netdev_priv(dev); |
| 268 | |
| 269 | unregister_netdev(dev); |
| 270 | dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), |
| 271 | lp->descriptors, lp->descriptors_laddr); |
| 272 | release_mem_region(dev->base_addr, SONIC_MEM_SIZE); |
| 273 | free_netdev(dev); |
| 274 | |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | static struct platform_driver jazz_sonic_driver = { |
| 279 | .probe = jazz_sonic_probe, |
| 280 | .remove = __devexit_p(jazz_sonic_device_remove), |
| 281 | .driver = { |
| 282 | .name = jazz_sonic_string, |
| 283 | .owner = THIS_MODULE, |
| 284 | }, |
| 285 | }; |
| 286 | |
| 287 | static int __init jazz_sonic_init_module(void) |
| 288 | { |
| 289 | return platform_driver_register(&jazz_sonic_driver); |
| 290 | } |
| 291 | |
| 292 | static void __exit jazz_sonic_cleanup_module(void) |
| 293 | { |
| 294 | platform_driver_unregister(&jazz_sonic_driver); |
| 295 | } |
| 296 | |
| 297 | module_init(jazz_sonic_init_module); |
| 298 | module_exit(jazz_sonic_cleanup_module); |