1916 lines · c
1/* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]02 * driver for linux.3 * Written 1996 by Russell Nelson, with reference to skeleton.c4 * written 1993-1994 by Donald Becker.5 *6 * This software may be used and distributed according to the terms7 * of the GNU General Public License, incorporated herein by reference.8 *9 * The author may be reached at nelson@crynwr.com, Crynwr10 * Software, 521 Pleasant Valley Rd., Potsdam, NY 1367611 *12 * Other contributors:13 * Mike Cruse : mcruse@cti-ltd.com14 * Russ Nelson15 * Melody Lee : ethernet@crystal.cirrus.com16 * Alan Cox17 * Andrew Morton18 * Oskar Schirmer : oskar@scara.com19 * Deepak Saxena : dsaxena@plexity.net20 * Dmitry Pervushin : dpervushin@ru.mvista.com21 * Deepak Saxena : dsaxena@plexity.net22 * Domenico Andreoli : cavokz@gmail.com23 */24 25 26/*27 * Set this to zero to disable DMA code28 *29 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'30 * module options so we don't break any startup scripts.31 */32#ifndef CONFIG_ISA_DMA_API33#define ALLOW_DMA 034#else35#define ALLOW_DMA 136#endif37 38/*39 * Set this to zero to remove all the debug statements via40 * dead code elimination41 */42#define DEBUGGING 143 44/* Sources:45 * Crynwr packet driver epktisa.46 * Crystal Semiconductor data sheets.47 */48 49#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt50 51#include <linux/module.h>52#include <linux/printk.h>53#include <linux/errno.h>54#include <linux/netdevice.h>55#include <linux/etherdevice.h>56#include <linux/of.h>57#include <linux/platform_device.h>58#include <linux/kernel.h>59#include <linux/types.h>60#include <linux/fcntl.h>61#include <linux/interrupt.h>62#include <linux/ioport.h>63#include <linux/in.h>64#include <linux/jiffies.h>65#include <linux/skbuff.h>66#include <linux/spinlock.h>67#include <linux/string.h>68#include <linux/init.h>69#include <linux/bitops.h>70#include <linux/delay.h>71#include <linux/gfp.h>72#include <linux/io.h>73 74#include <net/Space.h>75 76#include <asm/irq.h>77#include <linux/atomic.h>78#if ALLOW_DMA79#include <asm/dma.h>80#endif81 82#include "cs89x0.h"83 84#define cs89_dbg(val, level, fmt, ...) \85do { \86 if (val <= net_debug) \87 pr_##level(fmt, ##__VA_ARGS__); \88} while (0)89 90static char version[] __initdata =91 "v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton";92 93#define DRV_NAME "cs89x0"94 95/* First, a few definitions that the brave might change.96 * A zero-terminated list of I/O addresses to be probed. Some special flags..97 * Addr & 1 = Read back the address port, look for signature and reset98 * the page window before probing99 * Addr & 3 = Reset the page window and probe100 * The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,101 * but it is possible that a Cirrus board could be plugged into the ISA102 * slots.103 */104/* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps105 * them to system IRQ numbers. This mapping is card specific and is set to106 * the configuration of the Cirrus Eval board for this chip.107 */108#if IS_ENABLED(CONFIG_CS89x0_ISA)109static unsigned int netcard_portlist[] __used __initdata = {110 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240,111 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0112};113static unsigned int cs8900_irq_map[] = {114 10, 11, 12, 5115};116#endif117 118#if DEBUGGING119static unsigned int net_debug = DEBUGGING;120#else121#define net_debug 0 /* gcc will remove all the debug code for us */122#endif123 124/* The number of low I/O ports used by the ethercard. */125#define NETCARD_IO_EXTENT 16126 127/* we allow the user to override various values normally set in the EEPROM */128#define FORCE_RJ45 0x0001 /* pick one of these three */129#define FORCE_AUI 0x0002130#define FORCE_BNC 0x0004131 132#define FORCE_AUTO 0x0010 /* pick one of these three */133#define FORCE_HALF 0x0020134#define FORCE_FULL 0x0030135 136/* Information that need to be kept for each board. */137struct net_local {138 int chip_type; /* one of: CS8900, CS8920, CS8920M */139 char chip_revision; /* revision letter of the chip ('A'...) */140 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */141 int auto_neg_cnf; /* auto-negotiation word from EEPROM */142 int adapter_cnf; /* adapter configuration from EEPROM */143 int isa_config; /* ISA configuration from EEPROM */144 int irq_map; /* IRQ map from EEPROM */145 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */146 int curr_rx_cfg; /* a copy of PP_RxCFG */147 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */148 int send_underrun; /* keep track of how many underruns in a row we get */149 int force; /* force various values; see FORCE* above. */150 spinlock_t lock;151 void __iomem *virt_addr;/* CS89x0 virtual address. */152#if ALLOW_DMA153 int use_dma; /* Flag: we're using dma */154 int dma; /* DMA channel */155 int dmasize; /* 16 or 64 */156 unsigned char *dma_buff; /* points to the beginning of the buffer */157 unsigned char *end_dma_buff; /* points to the end of the buffer */158 unsigned char *rx_dma_ptr; /* points to the next packet */159#endif160};161 162/* Example routines you must write ;->. */163#define tx_done(dev) 1164 165/*166 * Permit 'cs89x0_dma=N' in the kernel boot environment167 */168#if !defined(MODULE)169#if ALLOW_DMA170static int g_cs89x0_dma;171 172static int __init dma_fn(char *str)173{174 g_cs89x0_dma = simple_strtol(str, NULL, 0);175 return 1;176}177 178__setup("cs89x0_dma=", dma_fn);179#endif /* ALLOW_DMA */180 181static int g_cs89x0_media__force;182 183static int __init media_fn(char *str)184{185 if (!strcmp(str, "rj45"))186 g_cs89x0_media__force = FORCE_RJ45;187 else if (!strcmp(str, "aui"))188 g_cs89x0_media__force = FORCE_AUI;189 else if (!strcmp(str, "bnc"))190 g_cs89x0_media__force = FORCE_BNC;191 192 return 1;193}194 195__setup("cs89x0_media=", media_fn);196#endif197 198static void readwords(struct net_local *lp, int portno, void *buf, int length)199{200 u8 *buf8 = (u8 *)buf;201 202 do {203 u16 tmp16;204 205 tmp16 = ioread16(lp->virt_addr + portno);206 *buf8++ = (u8)tmp16;207 *buf8++ = (u8)(tmp16 >> 8);208 } while (--length);209}210 211static void writewords(struct net_local *lp, int portno, void *buf, int length)212{213 u8 *buf8 = (u8 *)buf;214 215 do {216 u16 tmp16;217 218 tmp16 = *buf8++;219 tmp16 |= (*buf8++) << 8;220 iowrite16(tmp16, lp->virt_addr + portno);221 } while (--length);222}223 224static u16225readreg(struct net_device *dev, u16 regno)226{227 struct net_local *lp = netdev_priv(dev);228 229 iowrite16(regno, lp->virt_addr + ADD_PORT);230 return ioread16(lp->virt_addr + DATA_PORT);231}232 233static void234writereg(struct net_device *dev, u16 regno, u16 value)235{236 struct net_local *lp = netdev_priv(dev);237 238 iowrite16(regno, lp->virt_addr + ADD_PORT);239 iowrite16(value, lp->virt_addr + DATA_PORT);240}241 242static int __init243wait_eeprom_ready(struct net_device *dev)244{245 unsigned long timeout = jiffies;246 /* check to see if the EEPROM is ready,247 * a timeout is used just in case EEPROM is ready when248 * SI_BUSY in the PP_SelfST is clear249 */250 while (readreg(dev, PP_SelfST) & SI_BUSY)251 if (time_after_eq(jiffies, timeout + 40))252 return -1;253 return 0;254}255 256static int __init257get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)258{259 int i;260 261 cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len);262 for (i = 0; i < len; i++) {263 if (wait_eeprom_ready(dev) < 0)264 return -1;265 /* Now send the EEPROM read command and EEPROM location to read */266 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);267 if (wait_eeprom_ready(dev) < 0)268 return -1;269 buffer[i] = readreg(dev, PP_EEData);270 cs89_dbg(3, cont, " %04x", buffer[i]);271 }272 cs89_dbg(3, cont, "\n");273 return 0;274}275 276static int __init277get_eeprom_cksum(int off, int len, int *buffer)278{279 int i, cksum;280 281 cksum = 0;282 for (i = 0; i < len; i++)283 cksum += buffer[i];284 cksum &= 0xffff;285 if (cksum == 0)286 return 0;287 return -1;288}289 290static void291write_irq(struct net_device *dev, int chip_type, int irq)292{293 int i;294 295 if (chip_type == CS8900) {296#if IS_ENABLED(CONFIG_CS89x0_ISA)297 /* Search the mapping table for the corresponding IRQ pin. */298 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)299 if (cs8900_irq_map[i] == irq)300 break;301 /* Not found */302 if (i == ARRAY_SIZE(cs8900_irq_map))303 i = 3;304#else305 /* INTRQ0 pin is used for interrupt generation. */306 i = 0;307#endif308 writereg(dev, PP_CS8900_ISAINT, i);309 } else {310 writereg(dev, PP_CS8920_ISAINT, irq);311 }312}313 314static void315count_rx_errors(int status, struct net_device *dev)316{317 dev->stats.rx_errors++;318 if (status & RX_RUNT)319 dev->stats.rx_length_errors++;320 if (status & RX_EXTRA_DATA)321 dev->stats.rx_length_errors++;322 if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT)))323 /* per str 172 */324 dev->stats.rx_crc_errors++;325 if (status & RX_DRIBBLE)326 dev->stats.rx_frame_errors++;327}328 329/*********************************330 * This page contains DMA routines331 *********************************/332 333#if ALLOW_DMA334 335#define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17)336 337static void338get_dma_channel(struct net_device *dev)339{340 struct net_local *lp = netdev_priv(dev);341 342 if (lp->dma) {343 dev->dma = lp->dma;344 lp->isa_config |= ISA_RxDMA;345 } else {346 if ((lp->isa_config & ANY_ISA_DMA) == 0)347 return;348 dev->dma = lp->isa_config & DMA_NO_MASK;349 if (lp->chip_type == CS8900)350 dev->dma += 5;351 if (dev->dma < 5 || dev->dma > 7) {352 lp->isa_config &= ~ANY_ISA_DMA;353 return;354 }355 }356}357 358static void359write_dma(struct net_device *dev, int chip_type, int dma)360{361 struct net_local *lp = netdev_priv(dev);362 if ((lp->isa_config & ANY_ISA_DMA) == 0)363 return;364 if (chip_type == CS8900)365 writereg(dev, PP_CS8900_ISADMA, dma - 5);366 else367 writereg(dev, PP_CS8920_ISADMA, dma);368}369 370static void371set_dma_cfg(struct net_device *dev)372{373 struct net_local *lp = netdev_priv(dev);374 375 if (lp->use_dma) {376 if ((lp->isa_config & ANY_ISA_DMA) == 0) {377 cs89_dbg(3, err, "set_dma_cfg(): no DMA\n");378 return;379 }380 if (lp->isa_config & ISA_RxDMA) {381 lp->curr_rx_cfg |= RX_DMA_ONLY;382 cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n");383 } else {384 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */385 cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n");386 }387 }388}389 390static int391dma_bufcfg(struct net_device *dev)392{393 struct net_local *lp = netdev_priv(dev);394 if (lp->use_dma)395 return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0;396 else397 return 0;398}399 400static int401dma_busctl(struct net_device *dev)402{403 int retval = 0;404 struct net_local *lp = netdev_priv(dev);405 if (lp->use_dma) {406 if (lp->isa_config & ANY_ISA_DMA)407 retval |= RESET_RX_DMA; /* Reset the DMA pointer */408 if (lp->isa_config & DMA_BURST)409 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */410 if (lp->dmasize == 64)411 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */412 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */413 }414 return retval;415}416 417static void418dma_rx(struct net_device *dev)419{420 struct net_local *lp = netdev_priv(dev);421 struct sk_buff *skb;422 int status, length;423 unsigned char *bp = lp->rx_dma_ptr;424 425 status = bp[0] + (bp[1] << 8);426 length = bp[2] + (bp[3] << 8);427 bp += 4;428 429 cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n",430 dev->name, (unsigned long)bp, status, length);431 432 if ((status & RX_OK) == 0) {433 count_rx_errors(status, dev);434 goto skip_this_frame;435 }436 437 /* Malloc up new buffer. */438 skb = netdev_alloc_skb(dev, length + 2);439 if (skb == NULL) {440 dev->stats.rx_dropped++;441 442 /* AKPM: advance bp to the next frame */443skip_this_frame:444 bp += (length + 3) & ~3;445 if (bp >= lp->end_dma_buff)446 bp -= lp->dmasize * 1024;447 lp->rx_dma_ptr = bp;448 return;449 }450 skb_reserve(skb, 2); /* longword align L3 header */451 452 if (bp + length > lp->end_dma_buff) {453 int semi_cnt = lp->end_dma_buff - bp;454 skb_put_data(skb, bp, semi_cnt);455 skb_put_data(skb, lp->dma_buff, length - semi_cnt);456 } else {457 skb_put_data(skb, bp, length);458 }459 bp += (length + 3) & ~3;460 if (bp >= lp->end_dma_buff)461 bp -= lp->dmasize*1024;462 lp->rx_dma_ptr = bp;463 464 cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n",465 dev->name, length,466 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |467 skb->data[ETH_ALEN + ETH_ALEN + 1]));468 469 skb->protocol = eth_type_trans(skb, dev);470 netif_rx(skb);471 dev->stats.rx_packets++;472 dev->stats.rx_bytes += length;473}474 475static void release_dma_buff(struct net_local *lp)476{477 if (lp->dma_buff) {478 free_pages((unsigned long)(lp->dma_buff),479 get_order(lp->dmasize * 1024));480 lp->dma_buff = NULL;481 }482}483 484#endif /* ALLOW_DMA */485 486static void487control_dc_dc(struct net_device *dev, int on_not_off)488{489 struct net_local *lp = netdev_priv(dev);490 unsigned int selfcontrol;491 unsigned long timenow = jiffies;492 /* control the DC to DC convertor in the SelfControl register.493 * Note: This is hooked up to a general purpose pin, might not494 * always be a DC to DC convertor.495 */496 497 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */498 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)499 selfcontrol |= HCB1;500 else501 selfcontrol &= ~HCB1;502 writereg(dev, PP_SelfCTL, selfcontrol);503 504 /* Wait for the DC/DC converter to power up - 500ms */505 while (time_before(jiffies, timenow + HZ))506 ;507}508 509/* send a test packet - return true if carrier bits are ok */510static int511send_test_pkt(struct net_device *dev)512{513 struct net_local *lp = netdev_priv(dev);514 char test_packet[] = {515 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,516 0, 46, /* A 46 in network order */517 0, 0, /* DSAP=0 & SSAP=0 fields */518 0xf3, 0 /* Control (Test Req + P bit set) */519 };520 unsigned long timenow = jiffies;521 522 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);523 524 memcpy(test_packet, dev->dev_addr, ETH_ALEN);525 memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN);526 527 iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT);528 iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT);529 530 /* Test to see if the chip has allocated memory for the packet */531 while (time_before(jiffies, timenow + 5))532 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)533 break;534 if (time_after_eq(jiffies, timenow + 5))535 return 0; /* this shouldn't happen */536 537 /* Write the contents of the packet */538 writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1);539 540 cs89_dbg(1, debug, "Sending test packet ");541 /* wait a couple of jiffies for packet to be received */542 for (timenow = jiffies; time_before(jiffies, timenow + 3);)543 ;544 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {545 cs89_dbg(1, cont, "succeeded\n");546 return 1;547 }548 cs89_dbg(1, cont, "failed\n");549 return 0;550}551 552#define DETECTED_NONE 0553#define DETECTED_RJ45H 1554#define DETECTED_RJ45F 2555#define DETECTED_AUI 3556#define DETECTED_BNC 4557 558static int559detect_tp(struct net_device *dev)560{561 struct net_local *lp = netdev_priv(dev);562 unsigned long timenow = jiffies;563 int fdx;564 565 cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name);566 567 /* If connected to another full duplex capable 10-Base-T card568 * the link pulses seem to be lost when the auto detect bit in569 * the LineCTL is set. To overcome this the auto detect bit will570 * be cleared whilst testing the 10-Base-T interface. This would571 * not be necessary for the sparrow chip but is simpler to do it572 * anyway.573 */574 writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY);575 control_dc_dc(dev, 0);576 577 /* Delay for the hardware to work out if the TP cable is present578 * - 150ms579 */580 for (timenow = jiffies; time_before(jiffies, timenow + 15);)581 ;582 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)583 return DETECTED_NONE;584 585 if (lp->chip_type == CS8900) {586 switch (lp->force & 0xf0) {587#if 0588 case FORCE_AUTO:589 pr_info("%s: cs8900 doesn't autonegotiate\n",590 dev->name);591 return DETECTED_NONE;592#endif593 /* CS8900 doesn't support AUTO, change to HALF*/594 case FORCE_AUTO:595 lp->force &= ~FORCE_AUTO;596 lp->force |= FORCE_HALF;597 break;598 case FORCE_HALF:599 break;600 case FORCE_FULL:601 writereg(dev, PP_TestCTL,602 readreg(dev, PP_TestCTL) | FDX_8900);603 break;604 }605 fdx = readreg(dev, PP_TestCTL) & FDX_8900;606 } else {607 switch (lp->force & 0xf0) {608 case FORCE_AUTO:609 lp->auto_neg_cnf = AUTO_NEG_ENABLE;610 break;611 case FORCE_HALF:612 lp->auto_neg_cnf = 0;613 break;614 case FORCE_FULL:615 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;616 break;617 }618 619 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);620 621 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {622 pr_info("%s: negotiating duplex...\n", dev->name);623 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {624 if (time_after(jiffies, timenow + 4000)) {625 pr_err("**** Full / half duplex auto-negotiation timed out ****\n");626 break;627 }628 }629 }630 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;631 }632 if (fdx)633 return DETECTED_RJ45F;634 else635 return DETECTED_RJ45H;636}637 638static int639detect_bnc(struct net_device *dev)640{641 struct net_local *lp = netdev_priv(dev);642 643 cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name);644 control_dc_dc(dev, 1);645 646 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);647 648 if (send_test_pkt(dev))649 return DETECTED_BNC;650 else651 return DETECTED_NONE;652}653 654static int655detect_aui(struct net_device *dev)656{657 struct net_local *lp = netdev_priv(dev);658 659 cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name);660 control_dc_dc(dev, 0);661 662 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);663 664 if (send_test_pkt(dev))665 return DETECTED_AUI;666 else667 return DETECTED_NONE;668}669 670/* We have a good packet(s), get it/them out of the buffers. */671static void672net_rx(struct net_device *dev)673{674 struct net_local *lp = netdev_priv(dev);675 struct sk_buff *skb;676 int status, length;677 678 status = ioread16(lp->virt_addr + RX_FRAME_PORT);679 length = ioread16(lp->virt_addr + RX_FRAME_PORT);680 681 if ((status & RX_OK) == 0) {682 count_rx_errors(status, dev);683 return;684 }685 686 /* Malloc up new buffer. */687 skb = netdev_alloc_skb(dev, length + 2);688 if (skb == NULL) {689 dev->stats.rx_dropped++;690 return;691 }692 skb_reserve(skb, 2); /* longword align L3 header */693 694 readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1);695 if (length & 1)696 skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT);697 698 cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n",699 dev->name, length,700 (skb->data[ETH_ALEN + ETH_ALEN] << 8) |701 skb->data[ETH_ALEN + ETH_ALEN + 1]);702 703 skb->protocol = eth_type_trans(skb, dev);704 netif_rx(skb);705 dev->stats.rx_packets++;706 dev->stats.rx_bytes += length;707}708 709/* The typical workload of the driver:710 * Handle the network interface interrupts.711 */712 713static irqreturn_t net_interrupt(int irq, void *dev_id)714{715 struct net_device *dev = dev_id;716 struct net_local *lp;717 int status;718 int handled = 0;719 720 lp = netdev_priv(dev);721 722 /* we MUST read all the events out of the ISQ, otherwise we'll never723 * get interrupted again. As a consequence, we can't have any limit724 * on the number of times we loop in the interrupt handler. The725 * hardware guarantees that eventually we'll run out of events. Of726 * course, if you're on a slow machine, and packets are arriving727 * faster than you can read them off, you're screwed. Hasta la728 * vista, baby!729 */730 while ((status = ioread16(lp->virt_addr + ISQ_PORT))) {731 cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status);732 handled = 1;733 switch (status & ISQ_EVENT_MASK) {734 case ISQ_RECEIVER_EVENT:735 /* Got a packet(s). */736 net_rx(dev);737 break;738 case ISQ_TRANSMITTER_EVENT:739 dev->stats.tx_packets++;740 netif_wake_queue(dev); /* Inform upper layers. */741 if ((status & (TX_OK |742 TX_LOST_CRS |743 TX_SQE_ERROR |744 TX_LATE_COL |745 TX_16_COL)) != TX_OK) {746 if ((status & TX_OK) == 0)747 dev->stats.tx_errors++;748 if (status & TX_LOST_CRS)749 dev->stats.tx_carrier_errors++;750 if (status & TX_SQE_ERROR)751 dev->stats.tx_heartbeat_errors++;752 if (status & TX_LATE_COL)753 dev->stats.tx_window_errors++;754 if (status & TX_16_COL)755 dev->stats.tx_aborted_errors++;756 }757 break;758 case ISQ_BUFFER_EVENT:759 if (status & READY_FOR_TX) {760 /* we tried to transmit a packet earlier,761 * but inexplicably ran out of buffers.762 * That shouldn't happen since we only ever763 * load one packet. Shrug. Do the right764 * thing anyway.765 */766 netif_wake_queue(dev); /* Inform upper layers. */767 }768 if (status & TX_UNDERRUN) {769 cs89_dbg(0, err, "%s: transmit underrun\n",770 dev->name);771 lp->send_underrun++;772 if (lp->send_underrun == 3)773 lp->send_cmd = TX_AFTER_381;774 else if (lp->send_underrun == 6)775 lp->send_cmd = TX_AFTER_ALL;776 /* transmit cycle is done, although777 * frame wasn't transmitted - this778 * avoids having to wait for the upper779 * layers to timeout on us, in the780 * event of a tx underrun781 */782 netif_wake_queue(dev); /* Inform upper layers. */783 }784#if ALLOW_DMA785 if (lp->use_dma && (status & RX_DMA)) {786 int count = readreg(dev, PP_DmaFrameCnt);787 while (count) {788 cs89_dbg(5, debug,789 "%s: receiving %d DMA frames\n",790 dev->name, count);791 if (count > 1)792 cs89_dbg(2, debug,793 "%s: receiving %d DMA frames\n",794 dev->name, count);795 dma_rx(dev);796 if (--count == 0)797 count = readreg(dev, PP_DmaFrameCnt);798 if (count > 0)799 cs89_dbg(2, debug,800 "%s: continuing with %d DMA frames\n",801 dev->name, count);802 }803 }804#endif805 break;806 case ISQ_RX_MISS_EVENT:807 dev->stats.rx_missed_errors += (status >> 6);808 break;809 case ISQ_TX_COL_EVENT:810 dev->stats.collisions += (status >> 6);811 break;812 }813 }814 return IRQ_RETVAL(handled);815}816 817/* Open/initialize the board. This is called (in the current kernel)818 sometime after booting when the 'ifconfig' program is run.819 820 This routine should set everything up anew at each open, even821 registers that "should" only need to be set once at boot, so that822 there is non-reboot way to recover if something goes wrong.823*/824 825/* AKPM: do we need to do any locking here? */826 827static int828net_open(struct net_device *dev)829{830 struct net_local *lp = netdev_priv(dev);831 int result = 0;832 int i;833 int ret;834 835 if (dev->irq < 2) {836 /* Allow interrupts to be generated by the chip */837/* Cirrus' release had this: */838#if 0839 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);840#endif841/* And 2.3.47 had this: */842 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);843 844 for (i = 2; i < CS8920_NO_INTS; i++) {845 if ((1 << i) & lp->irq_map) {846 if (request_irq(i, net_interrupt, 0, dev->name,847 dev) == 0) {848 dev->irq = i;849 write_irq(dev, lp->chip_type, i);850 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */851 break;852 }853 }854 }855 856 if (i >= CS8920_NO_INTS) {857 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */858 pr_err("can't get an interrupt\n");859 ret = -EAGAIN;860 goto bad_out;861 }862 } else {863#if IS_ENABLED(CONFIG_CS89x0_ISA)864 if (((1 << dev->irq) & lp->irq_map) == 0) {865 pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",866 dev->name, dev->irq, lp->irq_map);867 ret = -EAGAIN;868 goto bad_out;869 }870#endif871/* FIXME: Cirrus' release had this: */872 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ);873/* And 2.3.47 had this: */874#if 0875 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);876#endif877 write_irq(dev, lp->chip_type, dev->irq);878 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);879 if (ret) {880 pr_err("request_irq(%d) failed\n", dev->irq);881 goto bad_out;882 }883 }884 885#if ALLOW_DMA886 if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) {887 unsigned long flags;888 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,889 get_order(lp->dmasize * 1024));890 if (!lp->dma_buff) {891 pr_err("%s: cannot get %dK memory for DMA\n",892 dev->name, lp->dmasize);893 goto release_irq;894 }895 cs89_dbg(1, debug, "%s: dma %lx %lx\n",896 dev->name,897 (unsigned long)lp->dma_buff,898 (unsigned long)isa_virt_to_bus(lp->dma_buff));899 if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS ||900 !dma_page_eq(lp->dma_buff,901 lp->dma_buff + lp->dmasize * 1024 - 1)) {902 pr_err("%s: not usable as DMA buffer\n", dev->name);903 goto release_irq;904 }905 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */906 if (request_dma(dev->dma, dev->name)) {907 pr_err("%s: cannot get dma channel %d\n",908 dev->name, dev->dma);909 goto release_irq;910 }911 write_dma(dev, lp->chip_type, dev->dma);912 lp->rx_dma_ptr = lp->dma_buff;913 lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024;914 spin_lock_irqsave(&lp->lock, flags);915 disable_dma(dev->dma);916 clear_dma_ff(dev->dma);917 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */918 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));919 set_dma_count(dev->dma, lp->dmasize * 1024);920 enable_dma(dev->dma);921 spin_unlock_irqrestore(&lp->lock, flags);922 }923#endif /* ALLOW_DMA */924 925 /* set the Ethernet address */926 for (i = 0; i < ETH_ALEN / 2; i++)927 writereg(dev, PP_IA + i * 2,928 (dev->dev_addr[i * 2] |929 (dev->dev_addr[i * 2 + 1] << 8)));930 931 /* while we're testing the interface, leave interrupts disabled */932 writereg(dev, PP_BusCTL, MEMORY_ON);933 934 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */935 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) &&936 (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))937 lp->linectl = LOW_RX_SQUELCH;938 else939 lp->linectl = 0;940 941 /* check to make sure that they have the "right" hardware available */942 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {943 case A_CNF_MEDIA_10B_T:944 result = lp->adapter_cnf & A_CNF_10B_T;945 break;946 case A_CNF_MEDIA_AUI:947 result = lp->adapter_cnf & A_CNF_AUI;948 break;949 case A_CNF_MEDIA_10B_2:950 result = lp->adapter_cnf & A_CNF_10B_2;951 break;952 default:953 result = lp->adapter_cnf & (A_CNF_10B_T |954 A_CNF_AUI |955 A_CNF_10B_2);956 }957 if (!result) {958 pr_err("%s: EEPROM is configured for unavailable media\n",959 dev->name);960release_dma:961#if ALLOW_DMA962 free_dma(dev->dma);963release_irq:964 release_dma_buff(lp);965#endif966 writereg(dev, PP_LineCTL,967 readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));968 free_irq(dev->irq, dev);969 ret = -EAGAIN;970 goto bad_out;971 }972 973 /* set the hardware to the configured choice */974 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {975 case A_CNF_MEDIA_10B_T:976 result = detect_tp(dev);977 if (result == DETECTED_NONE) {978 pr_warn("%s: 10Base-T (RJ-45) has no cable\n",979 dev->name);980 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */981 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */982 }983 break;984 case A_CNF_MEDIA_AUI:985 result = detect_aui(dev);986 if (result == DETECTED_NONE) {987 pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name);988 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */989 result = DETECTED_AUI; /* Yes! I don't care if I see a carrier */990 }991 break;992 case A_CNF_MEDIA_10B_2:993 result = detect_bnc(dev);994 if (result == DETECTED_NONE) {995 pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name);996 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */997 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */998 }999 break;1000 case A_CNF_MEDIA_AUTO:1001 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);1002 if (lp->adapter_cnf & A_CNF_10B_T) {1003 result = detect_tp(dev);1004 if (result != DETECTED_NONE)1005 break;1006 }1007 if (lp->adapter_cnf & A_CNF_AUI) {1008 result = detect_aui(dev);1009 if (result != DETECTED_NONE)1010 break;1011 }1012 if (lp->adapter_cnf & A_CNF_10B_2) {1013 result = detect_bnc(dev);1014 if (result != DETECTED_NONE)1015 break;1016 }1017 pr_err("%s: no media detected\n", dev->name);1018 goto release_dma;1019 }1020 switch (result) {1021 case DETECTED_NONE:1022 pr_err("%s: no network cable attached to configured media\n",1023 dev->name);1024 goto release_dma;1025 case DETECTED_RJ45H:1026 pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);1027 break;1028 case DETECTED_RJ45F:1029 pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);1030 break;1031 case DETECTED_AUI:1032 pr_info("%s: using 10Base-5 (AUI)\n", dev->name);1033 break;1034 case DETECTED_BNC:1035 pr_info("%s: using 10Base-2 (BNC)\n", dev->name);1036 break;1037 }1038 1039 /* Turn on both receive and transmit operations */1040 writereg(dev, PP_LineCTL,1041 readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);1042 1043 /* Receive only error free packets addressed to this card */1044 lp->rx_mode = 0;1045 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);1046 1047 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;1048 1049 if (lp->isa_config & STREAM_TRANSFER)1050 lp->curr_rx_cfg |= RX_STREAM_ENBL;1051#if ALLOW_DMA1052 set_dma_cfg(dev);1053#endif1054 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);1055 1056 writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL |1057 TX_SQE_ERROR_ENBL |1058 TX_OK_ENBL |1059 TX_LATE_COL_ENBL |1060 TX_JBR_ENBL |1061 TX_ANY_COL_ENBL |1062 TX_16_COL_ENBL));1063 1064 writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL |1065 RX_MISS_COUNT_OVRFLOW_ENBL |1066#if ALLOW_DMA1067 dma_bufcfg(dev) |1068#endif1069 TX_COL_COUNT_OVRFLOW_ENBL |1070 TX_UNDERRUN_ENBL));1071 1072 /* now that we've got our act together, enable everything */1073 writereg(dev, PP_BusCTL, (ENABLE_IRQ1074 | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */1075#if ALLOW_DMA1076 | dma_busctl(dev)1077#endif1078 ));1079 netif_start_queue(dev);1080 cs89_dbg(1, debug, "net_open() succeeded\n");1081 return 0;1082bad_out:1083 return ret;1084}1085 1086/* The inverse routine to net_open(). */1087static int1088net_close(struct net_device *dev)1089{1090#if ALLOW_DMA1091 struct net_local *lp = netdev_priv(dev);1092#endif1093 1094 netif_stop_queue(dev);1095 1096 writereg(dev, PP_RxCFG, 0);1097 writereg(dev, PP_TxCFG, 0);1098 writereg(dev, PP_BufCFG, 0);1099 writereg(dev, PP_BusCTL, 0);1100 1101 free_irq(dev->irq, dev);1102 1103#if ALLOW_DMA1104 if (lp->use_dma && lp->dma) {1105 free_dma(dev->dma);1106 release_dma_buff(lp);1107 }1108#endif1109 1110 /* Update the statistics here. */1111 return 0;1112}1113 1114/* Get the current statistics.1115 * This may be called with the card open or closed.1116 */1117static struct net_device_stats *1118net_get_stats(struct net_device *dev)1119{1120 struct net_local *lp = netdev_priv(dev);1121 unsigned long flags;1122 1123 spin_lock_irqsave(&lp->lock, flags);1124 /* Update the statistics from the device registers. */1125 dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);1126 dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);1127 spin_unlock_irqrestore(&lp->lock, flags);1128 1129 return &dev->stats;1130}1131 1132static void net_timeout(struct net_device *dev, unsigned int txqueue)1133{1134 /* If we get here, some higher level has decided we are broken.1135 There should really be a "kick me" function call instead. */1136 cs89_dbg(0, err, "%s: transmit timed out, %s?\n",1137 dev->name,1138 tx_done(dev) ? "IRQ conflict" : "network cable problem");1139 /* Try to restart the adaptor. */1140 netif_wake_queue(dev);1141}1142 1143static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev)1144{1145 struct net_local *lp = netdev_priv(dev);1146 unsigned long flags;1147 1148 cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n",1149 dev->name, skb->len,1150 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |1151 skb->data[ETH_ALEN + ETH_ALEN + 1]));1152 1153 /* keep the upload from being interrupted, since we1154 * ask the chip to start transmitting before the1155 * whole packet has been completely uploaded.1156 */1157 1158 spin_lock_irqsave(&lp->lock, flags);1159 netif_stop_queue(dev);1160 1161 /* initiate a transmit sequence */1162 iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT);1163 iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT);1164 1165 /* Test to see if the chip has allocated memory for the packet */1166 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {1167 /* Gasp! It hasn't. But that shouldn't happen since1168 * we're waiting for TxOk, so return 1 and requeue this packet.1169 */1170 1171 spin_unlock_irqrestore(&lp->lock, flags);1172 cs89_dbg(0, err, "Tx buffer not free!\n");1173 return NETDEV_TX_BUSY;1174 }1175 /* Write the contents of the packet */1176 writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1);1177 spin_unlock_irqrestore(&lp->lock, flags);1178 dev->stats.tx_bytes += skb->len;1179 dev_consume_skb_any(skb);1180 1181 /* We DO NOT call netif_wake_queue() here.1182 * We also DO NOT call netif_start_queue().1183 *1184 * Either of these would cause another bottom half run through1185 * net_send_packet() before this packet has fully gone out.1186 * That causes us to hit the "Gasp!" above and the send is rescheduled.1187 * it runs like a dog. We just return and wait for the Tx completion1188 * interrupt handler to restart the netdevice layer1189 */1190 1191 return NETDEV_TX_OK;1192}1193 1194static void set_multicast_list(struct net_device *dev)1195{1196 struct net_local *lp = netdev_priv(dev);1197 unsigned long flags;1198 u16 cfg;1199 1200 spin_lock_irqsave(&lp->lock, flags);1201 if (dev->flags & IFF_PROMISC)1202 lp->rx_mode = RX_ALL_ACCEPT;1203 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))1204 /* The multicast-accept list is initialized to accept-all,1205 * and we rely on higher-level filtering for now.1206 */1207 lp->rx_mode = RX_MULTCAST_ACCEPT;1208 else1209 lp->rx_mode = 0;1210 1211 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);1212 1213 /* in promiscuous mode, we accept errored packets,1214 * so we have to enable interrupts on them also1215 */1216 cfg = lp->curr_rx_cfg;1217 if (lp->rx_mode == RX_ALL_ACCEPT)1218 cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL;1219 writereg(dev, PP_RxCFG, cfg);1220 spin_unlock_irqrestore(&lp->lock, flags);1221}1222 1223static int set_mac_address(struct net_device *dev, void *p)1224{1225 int i;1226 struct sockaddr *addr = p;1227 1228 if (netif_running(dev))1229 return -EBUSY;1230 1231 eth_hw_addr_set(dev, addr->sa_data);1232 1233 cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n",1234 dev->name, dev->dev_addr);1235 1236 /* set the Ethernet address */1237 for (i = 0; i < ETH_ALEN / 2; i++)1238 writereg(dev, PP_IA + i * 2,1239 (dev->dev_addr[i * 2] |1240 (dev->dev_addr[i * 2 + 1] << 8)));1241 1242 return 0;1243}1244 1245#ifdef CONFIG_NET_POLL_CONTROLLER1246/*1247 * Polling receive - used by netconsole and other diagnostic tools1248 * to allow network i/o with interrupts disabled.1249 */1250static void net_poll_controller(struct net_device *dev)1251{1252 disable_irq(dev->irq);1253 net_interrupt(dev->irq, dev);1254 enable_irq(dev->irq);1255}1256#endif1257 1258static const struct net_device_ops net_ops = {1259 .ndo_open = net_open,1260 .ndo_stop = net_close,1261 .ndo_tx_timeout = net_timeout,1262 .ndo_start_xmit = net_send_packet,1263 .ndo_get_stats = net_get_stats,1264 .ndo_set_rx_mode = set_multicast_list,1265 .ndo_set_mac_address = set_mac_address,1266#ifdef CONFIG_NET_POLL_CONTROLLER1267 .ndo_poll_controller = net_poll_controller,1268#endif1269 .ndo_validate_addr = eth_validate_addr,1270};1271 1272static void __init reset_chip(struct net_device *dev)1273{1274#if !defined(CONFIG_MACH_MX31ADS)1275 struct net_local *lp = netdev_priv(dev);1276 unsigned long reset_start_time;1277 1278 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);1279 1280 /* wait 30 ms */1281 msleep(30);1282 1283 if (lp->chip_type != CS8900) {1284 /* Hardware problem requires PNP registers to be reconfigured after a reset */1285 iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT);1286 iowrite8(dev->irq, lp->virt_addr + DATA_PORT);1287 iowrite8(0, lp->virt_addr + DATA_PORT + 1);1288 1289 iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT);1290 iowrite8((dev->mem_start >> 16) & 0xff,1291 lp->virt_addr + DATA_PORT);1292 iowrite8((dev->mem_start >> 8) & 0xff,1293 lp->virt_addr + DATA_PORT + 1);1294 }1295 1296 /* Wait until the chip is reset */1297 reset_start_time = jiffies;1298 while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 &&1299 time_before(jiffies, reset_start_time + 2))1300 ;1301#endif /* !CONFIG_MACH_MX31ADS */1302}1303 1304/* This is the real probe routine.1305 * Linux has a history of friendly device probes on the ISA bus.1306 * A good device probes avoids doing writes, and1307 * verifies that the correct device exists and functions.1308 * Return 0 on success.1309 */1310static int __init1311cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular)1312{1313 struct net_local *lp = netdev_priv(dev);1314 int i;1315 int tmp;1316 unsigned rev_type = 0;1317 int eeprom_buff[CHKSUM_LEN];1318 u8 addr[ETH_ALEN];1319 int retval;1320 1321 /* Initialize the device structure. */1322 if (!modular) {1323 memset(lp, 0, sizeof(*lp));1324 spin_lock_init(&lp->lock);1325#ifndef MODULE1326#if ALLOW_DMA1327 if (g_cs89x0_dma) {1328 lp->use_dma = 1;1329 lp->dma = g_cs89x0_dma;1330 lp->dmasize = 16; /* Could make this an option... */1331 }1332#endif1333 lp->force = g_cs89x0_media__force;1334#endif1335 }1336 1337 pr_debug("PP_addr at %p[%x]: 0x%x\n",1338 ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT));1339 iowrite16(PP_ChipID, ioaddr + ADD_PORT);1340 1341 tmp = ioread16(ioaddr + DATA_PORT);1342 if (tmp != CHIP_EISA_ID_SIG) {1343 pr_debug("%s: incorrect signature at %p[%x]: 0x%x!="1344 CHIP_EISA_ID_SIG_STR "\n",1345 dev->name, ioaddr, DATA_PORT, tmp);1346 retval = -ENODEV;1347 goto out1;1348 }1349 1350 lp->virt_addr = ioaddr;1351 1352 /* get the chip type */1353 rev_type = readreg(dev, PRODUCT_ID_ADD);1354 lp->chip_type = rev_type & ~REVISON_BITS;1355 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';1356 1357 /* Check the chip type and revision in order to set the correct1358 * send command. CS8920 revision C and CS8900 revision F can use1359 * the faster send.1360 */1361 lp->send_cmd = TX_AFTER_381;1362 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')1363 lp->send_cmd = TX_NOW;1364 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')1365 lp->send_cmd = TX_NOW;1366 1367 pr_info_once("%s\n", version);1368 1369 pr_info("%s: cs89%c0%s rev %c found at %p ",1370 dev->name,1371 lp->chip_type == CS8900 ? '0' : '2',1372 lp->chip_type == CS8920M ? "M" : "",1373 lp->chip_revision,1374 lp->virt_addr);1375 1376 reset_chip(dev);1377 1378 /* Here we read the current configuration of the chip.1379 * If there is no Extended EEPROM then the idea is to not disturb1380 * the chip configuration, it should have been correctly setup by1381 * automatic EEPROM read on reset. So, if the chip says it read1382 * the EEPROM the driver will always do *something* instead of1383 * complain that adapter_cnf is 0.1384 */1385 1386 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==1387 (EEPROM_OK | EEPROM_PRESENT)) {1388 /* Load the MAC. */1389 for (i = 0; i < ETH_ALEN / 2; i++) {1390 unsigned int Addr;1391 Addr = readreg(dev, PP_IA + i * 2);1392 addr[i * 2] = Addr & 0xFF;1393 addr[i * 2 + 1] = Addr >> 8;1394 }1395 eth_hw_addr_set(dev, addr);1396 1397 /* Load the Adapter Configuration.1398 * Note: Barring any more specific information from some1399 * other source (ie EEPROM+Schematics), we would not know1400 * how to operate a 10Base2 interface on the AUI port.1401 * However, since we do read the status of HCB1 and use1402 * settings that always result in calls to control_dc_dc(dev,0)1403 * a BNC interface should work if the enable pin1404 * (dc/dc converter) is on HCB1.1405 * It will be called AUI however.1406 */1407 1408 lp->adapter_cnf = 0;1409 i = readreg(dev, PP_LineCTL);1410 /* Preserve the setting of the HCB1 pin. */1411 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))1412 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;1413 /* Save the sqelch bit */1414 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)1415 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;1416 /* Check if the card is in 10Base-t only mode */1417 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)1418 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;1419 /* Check if the card is in AUI only mode */1420 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)1421 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;1422 /* Check if the card is in Auto mode. */1423 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)1424 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |1425 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;1426 1427 cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",1428 dev->name, i, lp->adapter_cnf);1429 1430 /* IRQ. Other chips already probe, see below. */1431 if (lp->chip_type == CS8900)1432 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;1433 1434 pr_cont("[Cirrus EEPROM] ");1435 }1436 1437 pr_cont("\n");1438 1439 /* First check to see if an EEPROM is attached. */1440 1441 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)1442 pr_warn("No EEPROM, relying on command line....\n");1443 else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {1444 pr_warn("EEPROM read failed, relying on command line\n");1445 } else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {1446 /* Check if the chip was able to read its own configuration starting1447 at 0 in the EEPROM*/1448 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=1449 (EEPROM_OK | EEPROM_PRESENT))1450 pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");1451 1452 } else {1453 /* This reads an extended EEPROM that is not documented1454 * in the CS8900 datasheet.1455 */1456 1457 /* get transmission control word but keep the autonegotiation bits */1458 if (!lp->auto_neg_cnf)1459 lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2];1460 /* Store adapter configuration */1461 if (!lp->adapter_cnf)1462 lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2];1463 /* Store ISA configuration */1464 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2];1465 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8;1466 1467 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */1468 /* store the initial memory base address */1469 for (i = 0; i < ETH_ALEN / 2; i++) {1470 addr[i * 2] = eeprom_buff[i];1471 addr[i * 2 + 1] = eeprom_buff[i] >> 8;1472 }1473 eth_hw_addr_set(dev, addr);1474 cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n",1475 dev->name, lp->adapter_cnf);1476 }1477 1478 /* allow them to force multiple transceivers. If they force multiple, autosense */1479 {1480 int count = 0;1481 if (lp->force & FORCE_RJ45) {1482 lp->adapter_cnf |= A_CNF_10B_T;1483 count++;1484 }1485 if (lp->force & FORCE_AUI) {1486 lp->adapter_cnf |= A_CNF_AUI;1487 count++;1488 }1489 if (lp->force & FORCE_BNC) {1490 lp->adapter_cnf |= A_CNF_10B_2;1491 count++;1492 }1493 if (count > 1)1494 lp->adapter_cnf |= A_CNF_MEDIA_AUTO;1495 else if (lp->force & FORCE_RJ45)1496 lp->adapter_cnf |= A_CNF_MEDIA_10B_T;1497 else if (lp->force & FORCE_AUI)1498 lp->adapter_cnf |= A_CNF_MEDIA_AUI;1499 else if (lp->force & FORCE_BNC)1500 lp->adapter_cnf |= A_CNF_MEDIA_10B_2;1501 }1502 1503 cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n",1504 dev->name, lp->force, lp->adapter_cnf);1505 1506 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */1507 1508 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */1509 1510 /* FIXME: we don't set the Ethernet address on the command line. Use1511 * ifconfig IFACE hw ether AABBCCDDEEFF1512 */1513 1514 pr_info("media %s%s%s",1515 (lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "",1516 (lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "",1517 (lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : "");1518 1519 lp->irq_map = 0xffff;1520 1521 /* If this is a CS8900 then no pnp soft */1522 if (lp->chip_type != CS8900 &&1523 /* Check if the ISA IRQ has been set */1524 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,1525 (i != 0 && i < CS8920_NO_INTS))) {1526 if (!dev->irq)1527 dev->irq = i;1528 } else {1529 i = lp->isa_config & INT_NO_MASK;1530#if IS_ENABLED(CONFIG_CS89x0_ISA)1531 if (lp->chip_type == CS8900) {1532 /* Translate the IRQ using the IRQ mapping table. */1533 if (i >= ARRAY_SIZE(cs8900_irq_map))1534 pr_err("invalid ISA interrupt number %d\n", i);1535 else1536 i = cs8900_irq_map[i];1537 1538 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */1539 } else {1540 int irq_map_buff[IRQ_MAP_LEN/2];1541 1542 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,1543 IRQ_MAP_LEN / 2,1544 irq_map_buff) >= 0) {1545 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)1546 lp->irq_map = ((irq_map_buff[0] >> 8) |1547 (irq_map_buff[1] << 8));1548 }1549 }1550#endif1551 if (!dev->irq)1552 dev->irq = i;1553 }1554 1555 pr_cont(" IRQ %d", dev->irq);1556 1557#if ALLOW_DMA1558 if (lp->use_dma) {1559 get_dma_channel(dev);1560 pr_cont(", DMA %d", dev->dma);1561 } else1562#endif1563 pr_cont(", programmed I/O");1564 1565 /* print the ethernet address. */1566 pr_cont(", MAC %pM\n", dev->dev_addr);1567 1568 dev->netdev_ops = &net_ops;1569 dev->watchdog_timeo = HZ;1570 1571 cs89_dbg(0, info, "cs89x0_probe1() successful\n");1572 1573 retval = register_netdev(dev);1574 if (retval)1575 goto out2;1576 return 0;1577out2:1578 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);1579out1:1580 return retval;1581}1582 1583#if IS_ENABLED(CONFIG_CS89x0_ISA)1584/*1585 * This function converts the I/O port address used by the cs89x0_probe() and1586 * init_module() functions to the I/O memory address used by the1587 * cs89x0_probe1() function.1588 */1589static int __init1590cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular)1591{1592 struct net_local *lp = netdev_priv(dev);1593 int ret;1594 void __iomem *io_mem;1595 1596 if (!lp)1597 return -ENOMEM;1598 1599 dev->base_addr = ioport;1600 1601 if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) {1602 ret = -EBUSY;1603 goto out;1604 }1605 1606 io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT);1607 if (!io_mem) {1608 ret = -ENOMEM;1609 goto release;1610 }1611 1612 /* if they give us an odd I/O address, then do ONE write to1613 * the address port, to get it back to address zero, where we1614 * expect to find the EISA signature word. An IO with a base of 0x31615 * will skip the test for the ADD_PORT.1616 */1617 if (ioport & 1) {1618 cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n", dev->name, ioport);1619 if ((ioport & 2) != 2) {1620 if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) !=1621 ADD_SIG) {1622 pr_err("%s: bad signature 0x%x\n",1623 dev->name, ioread16(io_mem + ADD_PORT));1624 ret = -ENODEV;1625 goto unmap;1626 }1627 }1628 }1629 1630 ret = cs89x0_probe1(dev, io_mem, modular);1631 if (!ret)1632 goto out;1633unmap:1634 ioport_unmap(io_mem);1635release:1636 release_region(ioport, NETCARD_IO_EXTENT);1637out:1638 return ret;1639}1640 1641#ifndef MODULE1642/* Check for a network adaptor of this type, and return '0' iff one exists.1643 * If dev->base_addr == 0, probe all likely locations.1644 * If dev->base_addr == 1, always return failure.1645 * If dev->base_addr == 2, allocate space for the device and return success1646 * (detachable devices only).1647 * Return 0 on success.1648 */1649 1650struct net_device * __init cs89x0_probe(int unit)1651{1652 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));1653 unsigned *port;1654 int err = 0;1655 int irq;1656 int io;1657 1658 if (!dev)1659 return ERR_PTR(-ENODEV);1660 1661 sprintf(dev->name, "eth%d", unit);1662 netdev_boot_setup_check(dev);1663 io = dev->base_addr;1664 irq = dev->irq;1665 1666 cs89_dbg(0, info, "cs89x0_probe(0x%x)\n", io);1667 1668 if (io > 0x1ff) { /* Check a single specified location. */1669 err = cs89x0_ioport_probe(dev, io, 0);1670 } else if (io != 0) { /* Don't probe at all. */1671 err = -ENXIO;1672 } else {1673 for (port = netcard_portlist; *port; port++) {1674 if (cs89x0_ioport_probe(dev, *port, 0) == 0)1675 break;1676 dev->irq = irq;1677 }1678 if (!*port)1679 err = -ENODEV;1680 }1681 if (err)1682 goto out;1683 return dev;1684out:1685 free_netdev(dev);1686 pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");1687 return ERR_PTR(err);1688}1689#else1690static struct net_device *dev_cs89x0;1691 1692/* Support the 'debug' module parm even if we're compiled for non-debug to1693 * avoid breaking someone's startup scripts1694 */1695 1696static int io;1697static int irq;1698static int debug;1699static char media[8];1700static int duplex = -1;1701 1702static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */1703static int dma;1704static int dmasize = 16; /* or 64 */1705 1706module_param_hw(io, int, ioport, 0);1707module_param_hw(irq, int, irq, 0);1708module_param(debug, int, 0);1709module_param_string(media, media, sizeof(media), 0);1710module_param(duplex, int, 0);1711module_param_hw(dma , int, dma, 0);1712module_param(dmasize , int, 0);1713module_param(use_dma , int, 0);1714MODULE_PARM_DESC(io, "cs89x0 I/O base address");1715MODULE_PARM_DESC(irq, "cs89x0 IRQ number");1716#if DEBUGGING1717MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");1718#else1719MODULE_PARM_DESC(debug, "(ignored)");1720#endif1721MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");1722/* No other value than -1 for duplex seems to be currently interpreted */1723MODULE_PARM_DESC(duplex, "(ignored)");1724#if ALLOW_DMA1725MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");1726MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");1727MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");1728#else1729MODULE_PARM_DESC(dma , "(ignored)");1730MODULE_PARM_DESC(dmasize , "(ignored)");1731MODULE_PARM_DESC(use_dma , "(ignored)");1732#endif1733 1734MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");1735MODULE_LICENSE("GPL");1736 1737/*1738 * media=t - specify media type1739 * or media=21740 * or media=aui1741 * or medai=auto1742 * duplex=0 - specify forced half/full/autonegotiate duplex1743 * debug=# - debug level1744 *1745 * Default Chip Configuration:1746 * DMA Burst = enabled1747 * IOCHRDY Enabled = enabled1748 * UseSA = enabled1749 * CS8900 defaults to half-duplex if not specified on command-line1750 * CS8920 defaults to autoneg if not specified on command-line1751 * Use reset defaults for other config parameters1752 *1753 * Assumptions:1754 * media type specified is supported (circuitry is present)1755 * if memory address is > 1MB, then required mem decode hw is present1756 * if 10B-2, then agent other than driver will enable DC/DC converter1757 * (hw or software util)1758 */1759 1760static int __init cs89x0_isa_init_module(void)1761{1762 struct net_device *dev;1763 struct net_local *lp;1764 int ret = 0;1765 1766#if DEBUGGING1767 net_debug = debug;1768#else1769 debug = 0;1770#endif1771 dev = alloc_etherdev(sizeof(struct net_local));1772 if (!dev)1773 return -ENOMEM;1774 1775 dev->irq = irq;1776 dev->base_addr = io;1777 lp = netdev_priv(dev);1778 1779#if ALLOW_DMA1780 if (use_dma) {1781 lp->use_dma = use_dma;1782 lp->dma = dma;1783 lp->dmasize = dmasize;1784 }1785#endif1786 1787 spin_lock_init(&lp->lock);1788 1789 /* boy, they'd better get these right */1790 if (!strcmp(media, "rj45"))1791 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;1792 else if (!strcmp(media, "aui"))1793 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;1794 else if (!strcmp(media, "bnc"))1795 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;1796 else1797 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;1798 1799 if (duplex == -1)1800 lp->auto_neg_cnf = AUTO_NEG_ENABLE;1801 1802 if (io == 0) {1803 pr_err("Module autoprobing not allowed\n");1804 pr_err("Append io=0xNNN\n");1805 ret = -EPERM;1806 goto out;1807 } else if (io <= 0x1ff) {1808 ret = -ENXIO;1809 goto out;1810 }1811 1812#if ALLOW_DMA1813 if (use_dma && dmasize != 16 && dmasize != 64) {1814 pr_err("dma size must be either 16K or 64K, not %dK\n",1815 dmasize);1816 ret = -EPERM;1817 goto out;1818 }1819#endif1820 ret = cs89x0_ioport_probe(dev, io, 1);1821 if (ret)1822 goto out;1823 1824 dev_cs89x0 = dev;1825 return 0;1826out:1827 free_netdev(dev);1828 return ret;1829}1830module_init(cs89x0_isa_init_module);1831 1832static void __exit cs89x0_isa_cleanup_module(void)1833{1834 struct net_local *lp = netdev_priv(dev_cs89x0);1835 1836 unregister_netdev(dev_cs89x0);1837 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);1838 ioport_unmap(lp->virt_addr);1839 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);1840 free_netdev(dev_cs89x0);1841}1842module_exit(cs89x0_isa_cleanup_module);1843#endif /* MODULE */1844#endif /* CONFIG_CS89x0_ISA */1845 1846#if IS_ENABLED(CONFIG_CS89x0_PLATFORM)1847static int __init cs89x0_platform_probe(struct platform_device *pdev)1848{1849 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));1850 void __iomem *virt_addr;1851 int err;1852 1853 if (!dev)1854 return -ENOMEM;1855 1856 dev->irq = platform_get_irq(pdev, 0);1857 if (dev->irq < 0) {1858 err = dev->irq;1859 goto free;1860 }1861 1862 virt_addr = devm_platform_ioremap_resource(pdev, 0);1863 if (IS_ERR(virt_addr)) {1864 err = PTR_ERR(virt_addr);1865 goto free;1866 }1867 1868 err = cs89x0_probe1(dev, virt_addr, 0);1869 if (err) {1870 dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n");1871 goto free;1872 }1873 1874 platform_set_drvdata(pdev, dev);1875 return 0;1876 1877free:1878 free_netdev(dev);1879 return err;1880}1881 1882static void cs89x0_platform_remove(struct platform_device *pdev)1883{1884 struct net_device *dev = platform_get_drvdata(pdev);1885 1886 /* This platform_get_resource() call will not return NULL, because1887 * the same call in cs89x0_platform_probe() has returned a non NULL1888 * value.1889 */1890 unregister_netdev(dev);1891 free_netdev(dev);1892}1893 1894static const struct of_device_id __maybe_unused cs89x0_match[] = {1895 { .compatible = "cirrus,cs8900", },1896 { .compatible = "cirrus,cs8920", },1897 { },1898};1899MODULE_DEVICE_TABLE(of, cs89x0_match);1900 1901static struct platform_driver cs89x0_driver = {1902 .driver = {1903 .name = DRV_NAME,1904 .of_match_table = of_match_ptr(cs89x0_match),1905 },1906 .remove_new = cs89x0_platform_remove,1907};1908 1909module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe);1910 1911#endif /* CONFIG_CS89x0_PLATFORM */1912 1913MODULE_LICENSE("GPL");1914MODULE_DESCRIPTION("Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 network driver");1915MODULE_AUTHOR("Russell Nelson <nelson@crynwr.com>");1916