target/linux/ifxmips/patches-2.6.30/130-ethernet.patch

   1 Index: linux-2.6.30.8/drivers/net/Kconfig
   2 ===================================================================
   3 --- linux-2.6.30.8.orig/drivers/net/Kconfig     2009-10-19 21:31:30.000000000 +0200
   4 +++ linux-2.6.30.8/drivers/net/Kconfig  2009-10-19 21:31:32.000000000 +0200
   5 @@ -353,6 +353,12 @@
   6
   7  source "drivers/net/arm/Kconfig"
   8
   9 +config IFXMIPS_MII0
  10 +       tristate "Infineon IFXMips eth0 driver"
  11 +       depends on IFXMIPS
  12 +       help
  13 +         Support for the MII0 inside the IFXMips SOC
  14 +
  15  config AX88796
  16         tristate "ASIX AX88796 NE2000 clone support"
  17         depends on ARM || MIPS || SUPERH
  18 Index: linux-2.6.30.8/drivers/net/Makefile
  19 ===================================================================
  20 --- linux-2.6.30.8.orig/drivers/net/Makefile    2009-10-19 21:31:30.000000000 +0200
  21 +++ linux-2.6.30.8/drivers/net/Makefile 2009-10-19 21:31:32.000000000 +0200
  22 @@ -234,6 +234,7 @@
  23  obj-$(CONFIG_MLX4_CORE) += mlx4/
  24  obj-$(CONFIG_ENC28J60) += enc28j60.o
  25  obj-$(CONFIG_ETHOC) += ethoc.o
  26 +obj-$(CONFIG_IFXMIPS_MII0) += ifxmips_mii0.o
  27
  28  obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o
  29
  30 Index: linux-2.6.30.8/drivers/net/ifxmips_mii0.c
  31 ===================================================================
  32 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  33 +++ linux-2.6.30.8/drivers/net/ifxmips_mii0.c   2009-10-19 21:41:10.000000000 +0200
  34 @@ -0,0 +1,389 @@
  35 +/*
  36 + *   This program is free software; you can redistribute it and/or modify
  37 + *   it under the terms of the GNU General Public License as published by
  38 + *   the Free Software Foundation; either version 2 of the License, or
  39 + *   (at your option) any later version.
  40 + *
  41 + *   This program is distributed in the hope that it will be useful,
  42 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  43 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  44 + *   GNU General Public License for more details.
  45 + *
  46 + *   You should have received a copy of the GNU General Public License
  47 + *   along with this program; if not, write to the Free Software
  48 + *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  49 + *
  50 + *   Copyright (C) 2005 Wu Qi Ming <Qi-Ming.Wu@infineon.com>
  51 + *   Copyright (C) 2008 John Crispin <blogic@openwrt.org>
  52 + */
  53 +
  54 +#include <linux/kernel.h>
  55 +#include <linux/slab.h>
  56 +#include <linux/errno.h>
  57 +#include <linux/types.h>
  58 +#include <linux/interrupt.h>
  59 +#include <linux/uaccess.h>
  60 +#include <linux/in.h>
  61 +#include <linux/netdevice.h>
  62 +#include <linux/etherdevice.h>
  63 +#include <linux/ip.h>
  64 +#include <linux/tcp.h>
  65 +#include <linux/skbuff.h>
  66 +#include <linux/mm.h>
  67 +#include <linux/platform_device.h>
  68 +#include <linux/ethtool.h>
  69 +#include <linux/init.h>
  70 +#include <linux/delay.h>
  71 +
  72 +#include <asm/checksum.h>
  73 +
  74 +#include <ifxmips.h>
  75 +#include <ifxmips_dma.h>
  76 +#include <ifxmips_pmu.h>
  77 +
  78 +struct ifxmips_mii_priv {
  79 +       struct net_device_stats stats;
  80 +       struct dma_device_info *dma_device;
  81 +       struct sk_buff *skb;
  82 +};
  83 +
  84 +static struct net_device *ifxmips_mii0_dev;
  85 +static unsigned char mac_addr[MAX_ADDR_LEN];
  86 +
  87 +void ifxmips_write_mdio(u32 phy_addr, u32 phy_reg, u16 phy_data)
  88 +{
  89 +       u32 val = MDIO_ACC_REQUEST |
  90 +               ((phy_addr & MDIO_ACC_ADDR_MASK) << MDIO_ACC_ADDR_OFFSET) |
  91 +               ((phy_reg & MDIO_ACC_REG_MASK) << MDIO_ACC_REG_OFFSET) |
  92 +               phy_data;
  93 +
  94 +       while (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
  95 +               ;
  96 +       ifxmips_w32(val, IFXMIPS_PPE32_MDIO_ACC);
  97 +}
  98 +EXPORT_SYMBOL(ifxmips_write_mdio);
  99 +
 100 +unsigned short ifxmips_read_mdio(u32 phy_addr, u32 phy_reg)
 101 +{
 102 +       u32 val = MDIO_ACC_REQUEST | MDIO_ACC_READ |
 103 +               ((phy_addr & MDIO_ACC_ADDR_MASK) << MDIO_ACC_ADDR_OFFSET) |
 104 +               ((phy_reg & MDIO_ACC_REG_MASK) << MDIO_ACC_REG_OFFSET);
 105 +
 106 +       while (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
 107 +               ;
 108 +       ifxmips_w32(val, IFXMIPS_PPE32_MDIO_ACC);
 109 +       while (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
 110 +               ;
 111 +       val = ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_VAL_MASK;
 112 +       return val;
 113 +}
 114 +EXPORT_SYMBOL(ifxmips_read_mdio);
 115 +
 116 +int ifxmips_ifxmips_mii_open(struct net_device *dev)
 117 +{
 118 +       struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
 119 +       struct dma_device_info *dma_dev = priv->dma_device;
 120 +       int i;
 121 +
 122 +       for (i = 0; i < dma_dev->max_rx_chan_num; i++) {
 123 +               if ((dma_dev->rx_chan[i])->control == IFXMIPS_DMA_CH_ON)
 124 +                       (dma_dev->rx_chan[i])->open(dma_dev->rx_chan[i]);
 125 +       }
 126 +       netif_start_queue(dev);
 127 +       return 0;
 128 +}
 129 +
 130 +int ifxmips_mii_release(struct net_device *dev)
 131 +{
 132 +       struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
 133 +       struct dma_device_info *dma_dev = priv->dma_device;
 134 +       int i;
 135 +
 136 +       for (i = 0; i < dma_dev->max_rx_chan_num; i++)
 137 +               dma_dev->rx_chan[i]->close(dma_dev->rx_chan[i]);
 138 +       netif_stop_queue(dev);
 139 +       return 0;
 140 +}
 141 +
 142 +int ifxmips_mii_hw_receive(struct net_device *dev, struct dma_device_info *dma_dev)
 143 +{
 144 +       struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
 145 +       unsigned char *buf = NULL;
 146 +       struct sk_buff *skb = NULL;
 147 +       int len = 0;
 148 +
 149 +       len = dma_device_read(dma_dev, &buf, (void **)&skb);
 150 +
 151 +       if (len >= ETHERNET_PACKET_DMA_BUFFER_SIZE) {
 152 +               printk(KERN_INFO "ifxmips_mii0: packet too large %d\n", len);
 153 +               goto ifxmips_mii_hw_receive_err_exit;
 154 +       }
 155 +
 156 +       /* remove CRC */
 157 +       len -= 4;
 158 +       if (skb == NULL) {
 159 +               printk(KERN_INFO "ifxmips_mii0: cannot restore pointer\n");
 160 +               goto ifxmips_mii_hw_receive_err_exit;
 161 +       }
 162 +
 163 +       if (len > (skb->end - skb->tail)) {
 164 +               printk(KERN_INFO "ifxmips_mii0: BUG, len:%d end:%p tail:%p\n",
 165 +                       (len+4), skb->end, skb->tail);
 166 +               goto ifxmips_mii_hw_receive_err_exit;
 167 +       }
 168 +
 169 +       skb_put(skb, len);
 170 +       skb->dev = dev;
 171 +       skb->protocol = eth_type_trans(skb, dev);
 172 +       netif_rx(skb);
 173 +
 174 +       priv->stats.rx_packets++;
 175 +       priv->stats.rx_bytes += len;
 176 +       return 0;
 177 +
 178 +ifxmips_mii_hw_receive_err_exit:
 179 +       if (len == 0) {
 180 +               if (skb)
 181 +                       dev_kfree_skb_any(skb);
 182 +               priv->stats.rx_errors++;
 183 +               priv->stats.rx_dropped++;
 184 +               return -EIO;
 185 +       } else {
 186 +               return len;
 187 +       }
 188 +}
 189 +
 190 +int ifxmips_mii_hw_tx(char *buf, int len, struct net_device *dev)
 191 +{
 192 +       int ret = 0;
 193 +       struct ifxmips_mii_priv *priv = netdev_priv(dev);
 194 +       struct dma_device_info *dma_dev = priv->dma_device;
 195 +       ret = dma_device_write(dma_dev, buf, len, priv->skb);
 196 +       return ret;
 197 +}
 198 +
 199 +int ifxmips_mii_tx(struct sk_buff *skb, struct net_device *dev)
 200 +{
 201 +       int len;
 202 +       char *data;
 203 +       struct ifxmips_mii_priv *priv = netdev_priv(dev);
 204 +       struct dma_device_info *dma_dev = priv->dma_device;
 205 +
 206 +       len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
 207 +       data = skb->data;
 208 +       priv->skb = skb;
 209 +       dev->trans_start = jiffies;
 210 +       /* TODO: we got more than 1 dma channel,
 211 +          so we should do something intelligent here to select one */
 212 +       dma_dev->current_tx_chan = 0;
 213 +
 214 +       wmb();
 215 +
 216 +       if (ifxmips_mii_hw_tx(data, len, dev) != len) {
 217 +               dev_kfree_skb_any(skb);
 218 +               priv->stats.tx_errors++;
 219 +               priv->stats.tx_dropped++;
 220 +       } else {
 221 +               priv->stats.tx_packets++;
 222 +               priv->stats.tx_bytes += len;
 223 +       }
 224 +
 225 +       return 0;
 226 +}
 227 +
 228 +void ifxmips_mii_tx_timeout(struct net_device *dev)
 229 +{
 230 +       int i;
 231 +       struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
 232 +
 233 +       priv->stats.tx_errors++;
 234 +       for (i = 0; i < priv->dma_device->max_tx_chan_num; i++)
 235 +               priv->dma_device->tx_chan[i]->disable_irq(priv->dma_device->tx_chan[i]);
 236 +       netif_wake_queue(dev);
 237 +       return;
 238 +}
 239 +
 240 +int dma_intr_handler(struct dma_device_info *dma_dev, int status)
 241 +{
 242 +       int i;
 243 +
 244 +       switch (status) {
 245 +       case RCV_INT:
 246 +               ifxmips_mii_hw_receive(ifxmips_mii0_dev, dma_dev);
 247 +               break;
 248 +
 249 +       case TX_BUF_FULL_INT:
 250 +               printk(KERN_INFO "ifxmips_mii0: tx buffer full\n");
 251 +               netif_stop_queue(ifxmips_mii0_dev);
 252 +               for (i = 0; i < dma_dev->max_tx_chan_num; i++) {
 253 +                       if ((dma_dev->tx_chan[i])->control == IFXMIPS_DMA_CH_ON)
 254 +                               dma_dev->tx_chan[i]->enable_irq(dma_dev->tx_chan[i]);
 255 +               }
 256 +               break;
 257 +
 258 +       case TRANSMIT_CPT_INT:
 259 +               for (i = 0; i < dma_dev->max_tx_chan_num; i++)
 260 +                       dma_dev->tx_chan[i]->disable_irq(dma_dev->tx_chan[i]);
 261 +
 262 +               netif_wake_queue(ifxmips_mii0_dev);
 263 +               break;
 264 +       }
 265 +
 266 +       return 0;
 267 +}
 268 +
 269 +unsigned char *ifxmips_etop_dma_buffer_alloc(int len, int *byte_offset, void **opt)
 270 +{
 271 +       unsigned char *buffer = NULL;
 272 +       struct sk_buff *skb = NULL;
 273 +
 274 +       skb = dev_alloc_skb(ETHERNET_PACKET_DMA_BUFFER_SIZE);
 275 +       if (skb == NULL)
 276 +               return NULL;
 277 +
 278 +       buffer = (unsigned char *)(skb->data);
 279 +       skb_reserve(skb, 2);
 280 +       *(int *)opt = (int)skb;
 281 +       *byte_offset = 2;
 282 +
 283 +       return buffer;
 284 +}
 285 +
 286 +void ifxmips_etop_dma_buffer_free(unsigned char *dataptr, void *opt)
 287 +{
 288 +       struct sk_buff *skb = NULL;
 289 +
 290 +       if (opt == NULL) {
 291 +               kfree(dataptr);
 292 +       } else {
 293 +               skb = (struct sk_buff *)opt;
 294 +               dev_kfree_skb_any(skb);
 295 +       }
 296 +}
 297 +
 298 +static struct net_device_stats *ifxmips_get_stats(struct net_device *dev)
 299 +{
 300 +       return &((struct ifxmips_mii_priv *)netdev_priv(dev))->stats;
 301 +}
 302 +
 303 +static int ifxmips_mii_dev_init(struct net_device *dev)
 304 +{
 305 +       int i;
 306 +       struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
 307 +       ether_setup(dev);
 308 +       printk(KERN_INFO "ifxmips_mii0: %s is up\n", dev->name);
 309 +       dev->open = ifxmips_ifxmips_mii_open;
 310 +       dev->stop = ifxmips_mii_release;
 311 +       dev->hard_start_xmit = ifxmips_mii_tx;
 312 +       dev->get_stats = ifxmips_get_stats;
 313 +       dev->tx_timeout = ifxmips_mii_tx_timeout;
 314 +       dev->watchdog_timeo = 10 * HZ;
 315 +       memset(priv, 0, sizeof(struct ifxmips_mii_priv));
 316 +       priv->dma_device = dma_device_reserve("PPE");
 317 +       if (!priv->dma_device) {
 318 +               BUG();
 319 +               return -ENODEV;
 320 +       }
 321 +       priv->dma_device->buffer_alloc = &ifxmips_etop_dma_buffer_alloc;
 322 +       priv->dma_device->buffer_free = &ifxmips_etop_dma_buffer_free;
 323 +       priv->dma_device->intr_handler = &dma_intr_handler;
 324 +       priv->dma_device->max_rx_chan_num = 4;
 325 +
 326 +       for (i = 0; i < priv->dma_device->max_rx_chan_num; i++) {
 327 +               priv->dma_device->rx_chan[i]->packet_size = ETHERNET_PACKET_DMA_BUFFER_SIZE;
 328 +               priv->dma_device->rx_chan[i]->control = IFXMIPS_DMA_CH_ON;
 329 +       }
 330 +
 331 +       for (i = 0; i < priv->dma_device->max_tx_chan_num; i++)
 332 +               if (i == 0)
 333 +                       priv->dma_device->tx_chan[i]->control = IFXMIPS_DMA_CH_ON;
 334 +               else
 335 +                       priv->dma_device->tx_chan[i]->control = IFXMIPS_DMA_CH_OFF;
 336 +
 337 +       dma_device_register(priv->dma_device);
 338 +
 339 +       printk(KERN_INFO "ifxmips_mii0: using mac=");
 340 +       for (i = 0; i < 6; i++) {
 341 +               dev->dev_addr[i] = mac_addr[i];
 342 +               printk("%02X%c", dev->dev_addr[i], (i == 5) ? ('\n') : (':'));
 343 +       }
 344 +       return 0;
 345 +}
 346 +
 347 +static void ifxmips_mii_chip_init(int mode)
 348 +{
 349 +       ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_DMA);
 350 +       ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_PPE);
 351 +
 352 +       if (mode == REV_MII_MODE)
 353 +               ifxmips_w32_mask(PPE32_MII_MASK, PPE32_MII_REVERSE, IFXMIPS_PPE32_CFG);
 354 +       else if (mode == MII_MODE)
 355 +               ifxmips_w32_mask(PPE32_MII_MASK, PPE32_MII_NORMAL, IFXMIPS_PPE32_CFG);
 356 +       ifxmips_w32(PPE32_PLEN_UNDER | PPE32_PLEN_OVER, IFXMIPS_PPE32_IG_PLEN_CTRL);
 357 +       ifxmips_w32(PPE32_CGEN, IFXMIPS_PPE32_ENET_MAC_CFG);
 358 +       wmb();
 359 +}
 360 +
 361 +static int ifxmips_mii_probe(struct platform_device *dev)
 362 +{
 363 +       int result = 0;
 364 +       unsigned char *mac = (unsigned char *)dev->dev.platform_data;
 365 +       ifxmips_mii0_dev = alloc_etherdev(sizeof(struct ifxmips_mii_priv));
 366 +       ifxmips_mii0_dev->init = ifxmips_mii_dev_init;
 367 +       memcpy(mac_addr, mac, 6);
 368 +       strcpy(ifxmips_mii0_dev->name, "eth%d");
 369 +       ifxmips_mii_chip_init(REV_MII_MODE);
 370 +       result = register_netdev(ifxmips_mii0_dev);
 371 +       if (result) {
 372 +               printk(KERN_INFO "ifxmips_mii0: error %i registering device \"%s\"\n", result, ifxmips_mii0_dev->name);
 373 +               goto out;
 374 +       }
 375 +
 376 +       printk(KERN_INFO "ifxmips_mii0: driver loaded!\n");
 377 +
 378 +out:
 379 +       return result;
 380 +}
 381 +
 382 +static int ifxmips_mii_remove(struct platform_device *dev)
 383 +{
 384 +       struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(ifxmips_mii0_dev);
 385 +
 386 +       printk(KERN_INFO "ifxmips_mii0: ifxmips_mii0 cleanup\n");
 387 +
 388 +       dma_device_unregister(priv->dma_device);
 389 +       dma_device_release(priv->dma_device);
 390 +       kfree(priv->dma_device);
 391 +       unregister_netdev(ifxmips_mii0_dev);
 392 +       return 0;
 393 +}
 394 +
 395 +static struct platform_driver ifxmips_mii_driver = {
 396 +       .probe = ifxmips_mii_probe,
 397 +       .remove = ifxmips_mii_remove,
 398 +       .driver = {
 399 +               .name = "ifxmips_mii0",
 400 +               .owner = THIS_MODULE,
 401 +       },
 402 +};
 403 +
 404 +int __init ifxmips_mii_init(void)
 405 +{
 406 +       int ret = platform_driver_register(&ifxmips_mii_driver);
 407 +       if (ret)
 408 +               printk(KERN_INFO "ifxmips_mii0: Error registering platfom driver!");
 409 +       return ret;
 410 +}
 411 +
 412 +static void __exit ifxmips_mii_cleanup(void)
 413 +{
 414 +       platform_driver_unregister(&ifxmips_mii_driver);
 415 +}
 416 +
 417 +module_init(ifxmips_mii_init);
 418 +module_exit(ifxmips_mii_cleanup);
 419 +
 420 +MODULE_LICENSE("GPL");
 421 +MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
 422 +MODULE_DESCRIPTION("ethernet driver for IFXMIPS boards");
 423 +