1/* 2 * drivers/net/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/module.h> 22#include <linux/kernel.h> 23#include <linux/delay.h> 24 25#include <linux/netdevice.h> 26#include <linux/platform_device.h> 27#include <linux/etherdevice.h> 28#include <linux/skbuff.h> 29#include <linux/mii.h> 30 31#include <asm/io.h> 32#include <mach/hardware.h> 33#include <mach/netx-regs.h> 34#include <mach/pfifo.h> 35#include <mach/xc.h> 36#include <mach/eth.h> 37 38/* XC Fifo Offsets */ 39#define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */ 40#define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */ 41 /* Data packages are indicated by XC */ 42#define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */ 43 /* Data packages are indicated by XC */ 44#define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */ 45 /* have to be indicated by ARM which */ 46 /* shall be sent */ 47#define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */ 48 /* have to be indicated by ARM which shall */ 49 /* be sent */ 50#define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */ 51 /* are confirmed */ 52#define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */ 53 /* packages are confirmed */ 54#define PFIFO_MASK(xcno) (0x7f << (xcno*8)) 55 56#define FIFO_PTR_FRAMELEN_SHIFT 0 57#define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0) 58#define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK) 59#define FIFO_PTR_TIMETRIG (1<<11) 60#define FIFO_PTR_MULTI_REQ 61#define FIFO_PTR_ORIGIN (1<<14) 62#define FIFO_PTR_VLAN (1<<15) 63#define FIFO_PTR_FRAMENO_SHIFT 16 64#define FIFO_PTR_FRAMENO_MASK (0x3f << 16) 65#define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK) 66#define FIFO_PTR_SEGMENT_SHIFT 22 67#define FIFO_PTR_SEGMENT_MASK (0xf << 22) 68#define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22) 69#define FIFO_PTR_ERROR_SHIFT 28 70#define FIFO_PTR_ERROR_MASK (0xf << 28) 71 72#define ISR_LINK_STATUS_CHANGE (1<<4) 73#define ISR_IND_LO (1<<3) 74#define ISR_CON_LO (1<<2) 75#define ISR_IND_HI (1<<1) 76#define ISR_CON_HI (1<<0) 77 78#define ETH_MAC_LOCAL_CONFIG 0x1560 79#define ETH_MAC_4321 0x1564 80#define ETH_MAC_65 0x1568 81 82#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16 83#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) 84#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK) 85#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24) 86#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23) 87#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22) 88#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21) 89#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20) 90 91#define CARDNAME "netx-eth" 92 93/* LSB must be zero */ 94#define INTERNAL_PHY_ADR 0x1c 95 96struct netx_eth_priv { 97 void __iomem *sram_base, *xpec_base, *xmac_base; 98 int id; 99 struct mii_if_info mii; 100 u32 msg_enable; 101 struct xc *xc; 102 spinlock_t lock; 103}; 104 105static void netx_eth_set_multicast_list(struct net_device *ndev) 106{ 107 /* implement me */ 108} 109 110static int 111netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) 112{ 113 struct netx_eth_priv *priv = netdev_priv(ndev); 114 unsigned char *buf = skb->data; 115 unsigned int len = skb->len; 116 117 spin_lock_irq(&priv->lock); 118 memcpy_toio(priv->sram_base + 1560, (void *)buf, len); 119 if (len < 60) { 120 memset_io(priv->sram_base + 1560 + len, 0, 60 - len); 121 len = 60; 122 } 123 124 pfifo_push(REQ_FIFO_PORT_LO(priv->id), 125 FIFO_PTR_SEGMENT(priv->id) | 126 FIFO_PTR_FRAMENO(1) | 127 FIFO_PTR_FRAMELEN(len)); 128 129 ndev->stats.tx_packets++; 130 ndev->stats.tx_bytes += skb->len; 131 132 netif_stop_queue(ndev); 133 spin_unlock_irq(&priv->lock); 134 dev_kfree_skb(skb); 135 136 return NETDEV_TX_OK; 137} 138 139static void netx_eth_receive(struct net_device *ndev) 140{ 141 struct netx_eth_priv *priv = netdev_priv(ndev); 142 unsigned int val, frameno, seg, len; 143 unsigned char *data; 144 struct sk_buff *skb; 145 146 val = pfifo_pop(IND_FIFO_PORT_LO(priv->id)); 147 148 frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT; 149 seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT; 150 len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT; 151 152 skb = dev_alloc_skb(len); 153 if (unlikely(skb == NULL)) { 154 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n", 155 ndev->name); 156 ndev->stats.rx_dropped++; 157 return; 158 } 159 160 data = skb_put(skb, len); 161 162 memcpy_fromio(data, priv->sram_base + frameno * 1560, len); 163 164 pfifo_push(EMPTY_PTR_FIFO(priv->id), 165 FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno)); 166 167 skb->protocol = eth_type_trans(skb, ndev); 168 netif_rx(skb); 169 ndev->stats.rx_packets++; 170 ndev->stats.rx_bytes += len; 171} 172 173static irqreturn_t 174netx_eth_interrupt(int irq, void *dev_id) 175{ 176 struct net_device *ndev = dev_id; 177 struct netx_eth_priv *priv = netdev_priv(ndev); 178 int status; 179 unsigned long flags; 180 181 spin_lock_irqsave(&priv->lock, flags); 182 183 status = readl(NETX_PFIFO_XPEC_ISR(priv->id)); 184 while (status) { 185 int fill_level; 186 writel(status, NETX_PFIFO_XPEC_ISR(priv->id)); 187 188 if ((status & ISR_CON_HI) || (status & ISR_IND_HI)) 189 printk("%s: unexpected status: 0x%08x\n", 190 __func__, status); 191 192 fill_level = 193 readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id))); 194 while (fill_level--) 195 netx_eth_receive(ndev); 196 197 if (status & ISR_CON_LO) 198 netif_wake_queue(ndev); 199 200 if (status & ISR_LINK_STATUS_CHANGE) 201 mii_check_media(&priv->mii, netif_msg_link(priv), 1); 202 203 status = readl(NETX_PFIFO_XPEC_ISR(priv->id)); 204 } 205 spin_unlock_irqrestore(&priv->lock, flags); 206 return IRQ_HANDLED; 207} 208 209static int netx_eth_open(struct net_device *ndev) 210{ 211 struct netx_eth_priv *priv = netdev_priv(ndev); 212 213 if (request_irq 214 (ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev)) 215 return -EAGAIN; 216 217 writel(ndev->dev_addr[0] | 218 ndev->dev_addr[1]<<8 | 219 ndev->dev_addr[2]<<16 | 220 ndev->dev_addr[3]<<24, 221 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321); 222 writel(ndev->dev_addr[4] | 223 ndev->dev_addr[5]<<8, 224 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65); 225 226 writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN | 227 LOCAL_CONFIG_CON_LO_IRQ_EN | 228 LOCAL_CONFIG_CON_HI_IRQ_EN | 229 LOCAL_CONFIG_IND_LO_IRQ_EN | 230 LOCAL_CONFIG_IND_HI_IRQ_EN, 231 priv->xpec_base + NETX_XPEC_RAM_START_OFS + 232 ETH_MAC_LOCAL_CONFIG); 233 234 mii_check_media(&priv->mii, netif_msg_link(priv), 1); 235 netif_start_queue(ndev); 236 237 return 0; 238} 239 240static int netx_eth_close(struct net_device *ndev) 241{ 242 struct netx_eth_priv *priv = netdev_priv(ndev); 243 244 netif_stop_queue(ndev); 245 246 writel(0, 247 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG); 248 249 free_irq(ndev->irq, ndev); 250 251 return 0; 252} 253 254static void netx_eth_timeout(struct net_device *ndev) 255{ 256 struct netx_eth_priv *priv = netdev_priv(ndev); 257 int i; 258 259 printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name); 260 261 spin_lock_irq(&priv->lock); 262 263 xc_reset(priv->xc); 264 xc_start(priv->xc); 265 266 for (i=2; i<=18; i++) 267 pfifo_push(EMPTY_PTR_FIFO(priv->id), 268 FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id)); 269 270 spin_unlock_irq(&priv->lock); 271 272 netif_wake_queue(ndev); 273} 274 275static int 276netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg) 277{ 278 unsigned int val; 279 280 val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) | 281 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES; 282 283 writel(val, NETX_MIIMU); 284 while (readl(NETX_MIIMU) & MIIMU_SNRDY); 285 286 return readl(NETX_MIIMU) >> 16; 287 288} 289 290static void 291netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value) 292{ 293 unsigned int val; 294 295 val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) | 296 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE | 297 MIIMU_DATA(value); 298 299 writel(val, NETX_MIIMU); 300 while (readl(NETX_MIIMU) & MIIMU_SNRDY); 301} 302 303static const struct net_device_ops netx_eth_netdev_ops = { 304 .ndo_open = netx_eth_open, 305 .ndo_stop = netx_eth_close, 306 .ndo_start_xmit = netx_eth_hard_start_xmit, 307 .ndo_tx_timeout = netx_eth_timeout, 308 .ndo_set_multicast_list = netx_eth_set_multicast_list, 309 .ndo_change_mtu = eth_change_mtu, 310 .ndo_validate_addr = eth_validate_addr, 311 .ndo_set_mac_address = eth_mac_addr, 312}; 313 314static int netx_eth_enable(struct net_device *ndev) 315{ 316 struct netx_eth_priv *priv = netdev_priv(ndev); 317 unsigned int mac4321, mac65; 318 int running, i; 319 320 ether_setup(ndev); 321 322 ndev->netdev_ops = &netx_eth_netdev_ops; 323 ndev->watchdog_timeo = msecs_to_jiffies(5000); 324 325 priv->msg_enable = NETIF_MSG_LINK; 326 priv->mii.phy_id_mask = 0x1f; 327 priv->mii.reg_num_mask = 0x1f; 328 priv->mii.force_media = 0; 329 priv->mii.full_duplex = 0; 330 priv->mii.dev = ndev; 331 priv->mii.mdio_read = netx_eth_phy_read; 332 priv->mii.mdio_write = netx_eth_phy_write; 333 priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id; 334 335 running = xc_running(priv->xc); 336 xc_stop(priv->xc); 337 338 /* if the xc engine is already running, assume the bootloader has 339 * loaded the firmware for us 340 */ 341 if (running) { 342 /* get Node Address from hardware */ 343 mac4321 = readl(priv->xpec_base + 344 NETX_XPEC_RAM_START_OFS + ETH_MAC_4321); 345 mac65 = readl(priv->xpec_base + 346 NETX_XPEC_RAM_START_OFS + ETH_MAC_65); 347 348 ndev->dev_addr[0] = mac4321 & 0xff; 349 ndev->dev_addr[1] = (mac4321 >> 8) & 0xff; 350 ndev->dev_addr[2] = (mac4321 >> 16) & 0xff; 351 ndev->dev_addr[3] = (mac4321 >> 24) & 0xff; 352 ndev->dev_addr[4] = mac65 & 0xff; 353 ndev->dev_addr[5] = (mac65 >> 8) & 0xff; 354 } else { 355 if (xc_request_firmware(priv->xc)) { 356 printk(CARDNAME ": requesting firmware failed\n"); 357 return -ENODEV; 358 } 359 } 360 361 xc_reset(priv->xc); 362 xc_start(priv->xc); 363 364 if (!is_valid_ether_addr(ndev->dev_addr)) 365 printk("%s: Invalid ethernet MAC address. Please " 366 "set using ifconfig\n", ndev->name); 367 368 for (i=2; i<=18; i++) 369 pfifo_push(EMPTY_PTR_FIFO(priv->id), 370 FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id)); 371 372 return register_netdev(ndev); 373 374} 375 376static int netx_eth_drv_probe(struct platform_device *pdev) 377{ 378 struct netx_eth_priv *priv; 379 struct net_device *ndev; 380 struct netxeth_platform_data *pdata; 381 int ret; 382 383 ndev = alloc_etherdev(sizeof (struct netx_eth_priv)); 384 if (!ndev) { 385 printk("%s: could not allocate device.\n", CARDNAME); 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