1/* 2 * drivers/net/ethernet/netx-eth.c 3 * 4 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 20#include <linux/init.h> 21#include <linux/interrupt.h> 22#include <linux/module.h> 23#include <linux/kernel.h> 24#include <linux/delay.h> 25 26#include <linux/netdevice.h> 27#include <linux/platform_device.h> 28#include <linux/etherdevice.h> 29#include <linux/skbuff.h> 30#include <linux/mii.h> 31 32#include <asm/io.h> 33#include <mach/hardware.h> 34#include <mach/netx-regs.h> 35#include <mach/pfifo.h> 36#include <mach/xc.h> 37#include <mach/eth.h> 38 39/* XC Fifo Offsets */ 40#define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */ 41#define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */ 42 /* Data packages are indicated by XC */ 43#define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */ 44 /* Data packages are indicated by XC */ 45#define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */ 46 /* have to be indicated by ARM which */ 47 /* shall be sent */ 48#define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */ 49 /* have to be indicated by ARM which shall */ 50 /* be sent */ 51#define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */ 52 /* are confirmed */ 53#define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */ 54 /* packages are confirmed */ 55#define PFIFO_MASK(xcno) (0x7f << (xcno*8)) 56 57#define FIFO_PTR_FRAMELEN_SHIFT 0 58#define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0) 59#define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK) 60#define FIFO_PTR_TIMETRIG (1<<11) 61#define FIFO_PTR_MULTI_REQ 62#define FIFO_PTR_ORIGIN (1<<14) 63#define FIFO_PTR_VLAN (1<<15) 64#define FIFO_PTR_FRAMENO_SHIFT 16 65#define FIFO_PTR_FRAMENO_MASK (0x3f << 16) 66#define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK) 67#define FIFO_PTR_SEGMENT_SHIFT 22 68#define FIFO_PTR_SEGMENT_MASK (0xf << 22) 69#define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22) 70#define FIFO_PTR_ERROR_SHIFT 28 71#define FIFO_PTR_ERROR_MASK (0xf << 28) 72 73#define ISR_LINK_STATUS_CHANGE (1<<4) 74#define ISR_IND_LO (1<<3) 75#define ISR_CON_LO (1<<2) 76#define ISR_IND_HI (1<<1) 77#define ISR_CON_HI (1<<0) 78 79#define ETH_MAC_LOCAL_CONFIG 0x1560 80#define ETH_MAC_4321 0x1564 81#define ETH_MAC_65 0x1568 82 83#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16 84#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) 85#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK) 86#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24) 87#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23) 88#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22) 89#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21) 90#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20) 91 92#define CARDNAME "netx-eth" 93 94/* LSB must be zero */ 95#define INTERNAL_PHY_ADR 0x1c 96 97struct netx_eth_priv { 98 void __iomem *sram_base, *xpec_base, *xmac_base; 99 int id; 100 struct mii_if_info mii; 101 u32 msg_enable; 102 struct xc *xc; 103 spinlock_t lock; 104}; 105 106static void netx_eth_set_multicast_list(struct net_device *ndev) 107{ 108 /* implement me */ 109} 110 111static int 112netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) 113{ 114 struct netx_eth_priv *priv = netdev_priv(ndev); 115 unsigned char *buf = skb->data; 116 unsigned int len = skb->len; 117 118 spin_lock_irq(&priv->lock); 119 memcpy_toio(priv->sram_base + 1560, (void *)buf, len); 120 if (len < 60) { 121 memset_io(priv->sram_base + 1560 + len, 0, 60 - len); 122 len = 60; 123 } 124 125 pfifo_push(REQ_FIFO_PORT_LO(priv->id), 126 FIFO_PTR_SEGMENT(priv->id) | 127 FIFO_PTR_FRAMENO(1) | 128 FIFO_PTR_FRAMELEN(len)); 129 130 ndev->stats.tx_packets++; 131 ndev->stats.tx_bytes += skb->len; 132 133 netif_stop_queue(ndev); 134 spin_unlock_irq(&priv->lock); 135 dev_kfree_skb(skb); 136 137 return NETDEV_TX_OK; 138} 139 140static void netx_eth_receive(struct net_device *ndev) 141{ 142 struct netx_eth_priv *priv = netdev_priv(ndev); 143 unsigned int val, frameno, seg, len; 144 unsigned char *data; 145 struct sk_buff *skb; 146 147 val = pfifo_pop(IND_FIFO_PORT_LO(priv->id)); 148 149 frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT; 150 seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT; 151 len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT; 152 153 skb = netdev_alloc_skb(ndev, len); 154 if (unlikely(skb == NULL)) { 155 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n", 156 ndev->name); 157 ndev->stats.rx_dropped++; 158 return; 159 } 160 161 data = skb_put(skb, len); 162 163 memcpy_fromio(data, priv->sram_base + frameno * 1560, len); 164 165 pfifo_push(EMPTY_PTR_FIFO(priv->id), 166 FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno)); 167 168 skb->protocol = eth_type_trans(skb, ndev); 169 netif_rx(skb); 170 ndev->stats.rx_packets++; 171 ndev->stats.rx_bytes += len; 172} 173 174static irqreturn_t 175netx_eth_interrupt(int irq, void *dev_id) 176{ 177 struct net_device *ndev = dev_id; 178 struct netx_eth_priv *priv = netdev_priv(ndev); 179 int status; 180 unsigned long flags; 181 182 spin_lock_irqsave(&priv->lock, flags); 183 184 status = readl(NETX_PFIFO_XPEC_ISR(priv->id)); 185 while (status) { 186 int fill_level; 187 writel(status, NETX_PFIFO_XPEC_ISR(priv->id)); 188 189 if ((status & ISR_CON_HI) || (status & ISR_IND_HI)) 190 printk("%s: unexpected status: 0x%08x\n", 191 __func__, status); 192 193 fill_level = 194 readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id))); 195 while (fill_level--) 196 netx_eth_receive(ndev); 197 198 if (status & ISR_CON_LO) 199 netif_wake_queue(ndev); 200 201 if (status & ISR_LINK_STATUS_CHANGE) 202 mii_check_media(&priv->mii, netif_msg_link(priv), 1); 203 204 status = readl(NETX_PFIFO_XPEC_ISR(priv->id)); 205 } 206 spin_unlock_irqrestore(&priv->lock, flags); 207 return IRQ_HANDLED; 208} 209 210static int netx_eth_open(struct net_device *ndev) 211{ 212 struct netx_eth_priv *priv = netdev_priv(ndev); 213 214 if (request_irq 215 (ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev)) 216 return -EAGAIN; 217 218 writel(ndev->dev_addr[0] | 219 ndev->dev_addr[1]<<8 | 220 ndev->dev_addr[2]<<16 | 221 ndev->dev_addr[3]<<24, 222 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321); 223 writel(ndev->dev_addr[4] | 224 ndev->dev_addr[5]<<8, 225 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65); 226 227 writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN | 228 LOCAL_CONFIG_CON_LO_IRQ_EN | 229 LOCAL_CONFIG_CON_HI_IRQ_EN | 230 LOCAL_CONFIG_IND_LO_IRQ_EN | 231 LOCAL_CONFIG_IND_HI_IRQ_EN, 232 priv->xpec_base + NETX_XPEC_RAM_START_OFS + 233 ETH_MAC_LOCAL_CONFIG); 234 235 mii_check_media(&priv->mii, netif_msg_link(priv), 1); 236 netif_start_queue(ndev); 237 238 return 0; 239} 240 241static int netx_eth_close(struct net_device *ndev) 242{ 243 struct netx_eth_priv *priv = netdev_priv(ndev); 244 245 netif_stop_queue(ndev); 246 247 writel(0, 248 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG); 249 250 free_irq(ndev->irq, ndev); 251 252 return 0; 253} 254 255static void netx_eth_timeout(struct net_device *ndev) 256{ 257 struct netx_eth_priv *priv = netdev_priv(ndev); 258 int i; 259 260 printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name); 261 262 spin_lock_irq(&priv->lock); 263 264 xc_reset(priv->xc); 265 xc_start(priv->xc); 266 267 for (i=2; i<=18; i++) 268 pfifo_push(EMPTY_PTR_FIFO(priv->id), 269 FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id)); 270 271 spin_unlock_irq(&priv->lock); 272 273 netif_wake_queue(ndev); 274} 275 276static int 277netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg) 278{ 279 unsigned int val; 280 281 val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) | 282 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES; 283 284 writel(val, NETX_MIIMU); 285 while (readl(NETX_MIIMU) & MIIMU_SNRDY); 286 287 return readl(NETX_MIIMU) >> 16; 288 289} 290 291static void 292netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value) 293{ 294 unsigned int val; 295 296 val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) | 297 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE | 298 MIIMU_DATA(value); 299 300 writel(val, NETX_MIIMU); 301 while (readl(NETX_MIIMU) & MIIMU_SNRDY); 302} 303 304static const struct net_device_ops netx_eth_netdev_ops = { 305 .ndo_open = netx_eth_open, 306 .ndo_stop = netx_eth_close, 307 .ndo_start_xmit = netx_eth_hard_start_xmit, 308 .ndo_tx_timeout = netx_eth_timeout, 309 .ndo_set_rx_mode = netx_eth_set_multicast_list, 310 .ndo_change_mtu = eth_change_mtu, 311 .ndo_validate_addr = eth_validate_addr, 312 .ndo_set_mac_address = eth_mac_addr, 313}; 314 315static int netx_eth_enable(struct net_device *ndev) 316{ 317 struct netx_eth_priv *priv = netdev_priv(ndev); 318 unsigned int mac4321, mac65; 319 int running, i; 320 321 ether_setup(ndev); 322 323 ndev->netdev_ops = &netx_eth_netdev_ops; 324 ndev->watchdog_timeo = msecs_to_jiffies(5000); 325 326 priv->msg_enable = NETIF_MSG_LINK; 327 priv->mii.phy_id_mask = 0x1f; 328 priv->mii.reg_num_mask = 0x1f; 329 priv->mii.force_media = 0; 330 priv->mii.full_duplex = 0; 331 priv->mii.dev = ndev; 332 priv->mii.mdio_read = netx_eth_phy_read; 333 priv->mii.mdio_write = netx_eth_phy_write; 334 priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id; 335 336 running = xc_running(priv->xc); 337 xc_stop(priv->xc); 338 339 /* if the xc engine is already running, assume the bootloader has 340 * loaded the firmware for us 341 */ 342 if (running) { 343 /* get Node Address from hardware */ 344 mac4321 = readl(priv->xpec_base + 345 NETX_XPEC_RAM_START_OFS + ETH_MAC_4321); 346 mac65 = readl(priv->xpec_base + 347 NETX_XPEC_RAM_START_OFS + ETH_MAC_65); 348 349 ndev->dev_addr[0] = mac4321 & 0xff; 350 ndev->dev_addr[1] = (mac4321 >> 8) & 0xff; 351 ndev->dev_addr[2] = (mac4321 >> 16) & 0xff; 352 ndev->dev_addr[3] = (mac4321 >> 24) & 0xff; 353 ndev->dev_addr[4] = mac65 & 0xff; 354 ndev->dev_addr[5] = (mac65 >> 8) & 0xff; 355 } else { 356 if (xc_request_firmware(priv->xc)) { 357 printk(CARDNAME ": requesting firmware failed\n"); 358 return -ENODEV; 359 } 360 } 361 362 xc_reset(priv->xc); 363 xc_start(priv->xc); 364 365 if (!is_valid_ether_addr(ndev->dev_addr)) 366 printk("%s: Invalid ethernet MAC address. Please " 367 "set using ifconfig\n", ndev->name); 368 369 for (i=2; i<=18; i++) 370 pfifo_push(EMPTY_PTR_FIFO(priv->id), 371 FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id)); 372 373 return register_netdev(ndev); 374 375} 376 377static int netx_eth_drv_probe(struct platform_device *pdev) 378{ 379 struct netx_eth_priv *priv; 380 struct net_device *ndev; 381 struct netxeth_platform_data *pdata; 382 int ret; 383 384 ndev = alloc_etherdev(sizeof (struct netx_eth_priv)); 385 if (!ndev) { 386 ret = -ENOMEM; 387 goto exit; 388 } 389 SET_NETDEV_DEV(ndev, &pdev->dev); 390 391 platform_set_drvdata(pdev, ndev); 392 393 priv = netdev_priv(ndev); 394 395 pdata = (struct netxeth_platform_data *)pdev->dev.platform_data; 396 priv->xc = request_xc(pdata->xcno, &pdev->dev); 397 if (!priv->xc) { 398 dev_err(&pdev->dev, "unable to request xc engine\n"); 399 ret = -ENODEV; 400 goto exit_free_netdev; 401 } 402 403 ndev->irq = priv->xc->irq; 404 priv->id = pdev->id; 405 priv->xpec_base = priv->xc->xpec_base; 406 priv->xmac_base = priv->xc->xmac_base; 407 priv->sram_base = priv->xc->sram_base; 408 409 spin_lock_init(&priv->lock); 410 411 ret = pfifo_request(PFIFO_MASK(priv->id)); 412 if (ret) { 413 printk("unable to request PFIFO\n"); 414 goto exit_free_xc; 415 } 416 417 ret = netx_eth_enable(ndev); 418 if (ret) 419 goto exit_free_pfifo; 420 421 return 0; 422exit_free_pfifo: 423 pfifo_free(PFIFO_MASK(priv->id)); 424exit_free_xc: 425 free_xc(priv->xc); 426exit_free_netdev: 427 platform_set_drvdata(pdev, NULL); 428 free_netdev(ndev); 429exit: 430 return ret; 431} 432 433static int netx_eth_drv_remove(struct platform_device *pdev) 434{ 435 struct net_device *ndev = dev_get_drvdata(&pdev->dev); 436 struct netx_eth_priv *priv = netdev_priv(ndev); 437 438 platform_set_drvdata(pdev, NULL); 439 440 unregister_netdev(ndev); 441 xc_stop(priv->xc); 442 free_xc(priv->xc); 443 free_netdev(ndev); 444 pfifo_free(PFIFO_MASK(priv->id)); 445 446 return 0; 447} 448 449static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state) 450{ 451 dev_err(&pdev->dev, "suspend not implemented\n"); 452 return 0; 453} 454 455static int netx_eth_drv_resume(struct platform_device *pdev) 456{ 457 dev_err(&pdev->dev, "resume not implemented\n"); 458 return 0; 459} 460 461static struct platform_driver netx_eth_driver = { 462 .probe = netx_eth_drv_probe, 463 .remove = netx_eth_drv_remove, 464 .suspend = netx_eth_drv_suspend, 465 .resume = netx_eth_drv_resume, 466 .driver = { 467 .name = CARDNAME, 468 .owner = THIS_MODULE, 469 }, 470}; 471 472static int __init netx_eth_init(void) 473{ 474 unsigned int phy_control, val; 475 476 printk("NetX Ethernet driver\n"); 477 478 phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) | 479 PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) | 480 PHY_CONTROL_PHY1_AUTOMDIX | 481 PHY_CONTROL_PHY1_EN | 482 PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) | 483 PHY_CONTROL_PHY0_AUTOMDIX | 484 PHY_CONTROL_PHY0_EN | 485 PHY_CONTROL_CLK_XLATIN; 486 487 val = readl(NETX_SYSTEM_IOC_ACCESS_KEY); 488 writel(val, NETX_SYSTEM_IOC_ACCESS_KEY); 489 490 writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL); 491 udelay(100); 492 493 val = readl(NETX_SYSTEM_IOC_ACCESS_KEY); 494 writel(val, NETX_SYSTEM_IOC_ACCESS_KEY); 495 496 writel(phy_control, NETX_SYSTEM_PHY_CONTROL); 497 498 return platform_driver_register(&netx_eth_driver); 499} 500 501static void __exit netx_eth_cleanup(void) 502{ 503 platform_driver_unregister(&netx_eth_driver); 504} 505 506module_init(netx_eth_init); 507module_exit(netx_eth_cleanup); 508 509MODULE_AUTHOR("Sascha Hauer, Pengutronix"); 510MODULE_LICENSE("GPL"); 511MODULE_ALIAS("platform:" CARDNAME); 512MODULE_FIRMWARE("xc0.bin"); 513MODULE_FIRMWARE("xc1.bin"); 514MODULE_FIRMWARE("xc2.bin"); 515